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drm/panthor: Don't add write fences to the shared BOs
[drm/drm-misc.git] / fs / smb / server / smb2pdu.c
blob7460089c186f08241b0b2c823e99578fdff7e01e
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
4 * Copyright (C) 2018 Samsung Electronics Co., Ltd.
5 */
6
7 #include <linux/inetdevice.h>
8 #include <net/addrconf.h>
9 #include <linux/syscalls.h>
10 #include <linux/namei.h>
11 #include <linux/statfs.h>
12 #include <linux/ethtool.h>
13 #include <linux/falloc.h>
14 #include <linux/mount.h>
15 #include <linux/filelock.h>
16
17 #include "glob.h"
18 #include "smbfsctl.h"
19 #include "oplock.h"
20 #include "smbacl.h"
21
22 #include "auth.h"
23 #include "asn1.h"
24 #include "connection.h"
25 #include "transport_ipc.h"
26 #include "transport_rdma.h"
27 #include "vfs.h"
28 #include "vfs_cache.h"
29 #include "misc.h"
30
31 #include "server.h"
32 #include "smb_common.h"
33 #include "../common/smb2status.h"
34 #include "ksmbd_work.h"
35 #include "mgmt/user_config.h"
36 #include "mgmt/share_config.h"
37 #include "mgmt/tree_connect.h"
38 #include "mgmt/user_session.h"
39 #include "mgmt/ksmbd_ida.h"
40 #include "ndr.h"
41
42 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
43 {
44 if (work->next_smb2_rcv_hdr_off) {
45 *req = ksmbd_req_buf_next(work);
46 *rsp = ksmbd_resp_buf_next(work);
47 } else {
48 *req = smb2_get_msg(work->request_buf);
49 *rsp = smb2_get_msg(work->response_buf);
50 }
51 }
52
53 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs))
54
55 /**
56 * check_session_id() - check for valid session id in smb header
57 * @conn: connection instance
58 * @id: session id from smb header
59 *
60 * Return: 1 if valid session id, otherwise 0
61 */
62 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
63 {
64 struct ksmbd_session *sess;
65
66 if (id == 0 || id == -1)
67 return false;
68
69 sess = ksmbd_session_lookup_all(conn, id);
70 if (sess)
71 return true;
72 pr_err("Invalid user session id: %llu\n", id);
73 return false;
74 }
75
76 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
77 {
78 return xa_load(&sess->ksmbd_chann_list, (long)conn);
79 }
80
81 /**
82 * smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
83 * @work: smb work
84 *
85 * Return: 0 if there is a tree connection matched or these are
86 * skipable commands, otherwise error
87 */
88 int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
89 {
90 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
91 unsigned int cmd = le16_to_cpu(req_hdr->Command);
92 unsigned int tree_id;
93
94 if (cmd == SMB2_TREE_CONNECT_HE ||
95 cmd == SMB2_CANCEL_HE ||
96 cmd == SMB2_LOGOFF_HE) {
97 ksmbd_debug(SMB, "skip to check tree connect request\n");
98 return 0;
99 }
100
101 if (xa_empty(&work->sess->tree_conns)) {
102 ksmbd_debug(SMB, "NO tree connected\n");
103 return -ENOENT;
104 }
105
106 tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
107
108 /*
109 * If request is not the first in Compound request,
110 * Just validate tree id in header with work->tcon->id.
111 */
112 if (work->next_smb2_rcv_hdr_off) {
113 if (!work->tcon) {
114 pr_err("The first operation in the compound does not have tcon\n");
115 return -EINVAL;
116 }
117 if (tree_id != UINT_MAX && work->tcon->id != tree_id) {
118 pr_err("tree id(%u) is different with id(%u) in first operation\n",
119 tree_id, work->tcon->id);
120 return -EINVAL;
121 }
122 return 1;
123 }
124
125 work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
126 if (!work->tcon) {
127 pr_err("Invalid tid %d\n", tree_id);
128 return -ENOENT;
129 }
130
131 return 1;
132 }
133
134 /**
135 * smb2_set_err_rsp() - set error response code on smb response
136 * @work: smb work containing response buffer
137 */
138 void smb2_set_err_rsp(struct ksmbd_work *work)
139 {
140 struct smb2_err_rsp *err_rsp;
141
142 if (work->next_smb2_rcv_hdr_off)
143 err_rsp = ksmbd_resp_buf_next(work);
144 else
145 err_rsp = smb2_get_msg(work->response_buf);
146
147 if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
148 int err;
149
150 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
151 err_rsp->ErrorContextCount = 0;
152 err_rsp->Reserved = 0;
153 err_rsp->ByteCount = 0;
154 err_rsp->ErrorData[0] = 0;
155 err = ksmbd_iov_pin_rsp(work, (void *)err_rsp,
156 __SMB2_HEADER_STRUCTURE_SIZE +
157 SMB2_ERROR_STRUCTURE_SIZE2);
158 if (err)
159 work->send_no_response = 1;
160 }
161 }
162
163 /**
164 * is_smb2_neg_cmd() - is it smb2 negotiation command
165 * @work: smb work containing smb header
166 *
167 * Return: true if smb2 negotiation command, otherwise false
168 */
169 bool is_smb2_neg_cmd(struct ksmbd_work *work)
170 {
171 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
172
173 /* is it SMB2 header ? */
174 if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
175 return false;
176
177 /* make sure it is request not response message */
178 if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
179 return false;
180
181 if (hdr->Command != SMB2_NEGOTIATE)
182 return false;
183
184 return true;
185 }
186
187 /**
188 * is_smb2_rsp() - is it smb2 response
189 * @work: smb work containing smb response buffer
190 *
191 * Return: true if smb2 response, otherwise false
192 */
193 bool is_smb2_rsp(struct ksmbd_work *work)
194 {
195 struct smb2_hdr *hdr = smb2_get_msg(work->response_buf);
196
197 /* is it SMB2 header ? */
198 if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
199 return false;
200
201 /* make sure it is response not request message */
202 if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
203 return false;
204
205 return true;
206 }
207
208 /**
209 * get_smb2_cmd_val() - get smb command code from smb header
210 * @work: smb work containing smb request buffer
211 *
212 * Return: smb2 request command value
213 */
214 u16 get_smb2_cmd_val(struct ksmbd_work *work)
215 {
216 struct smb2_hdr *rcv_hdr;
217
218 if (work->next_smb2_rcv_hdr_off)
219 rcv_hdr = ksmbd_req_buf_next(work);
220 else
221 rcv_hdr = smb2_get_msg(work->request_buf);
222 return le16_to_cpu(rcv_hdr->Command);
223 }
224
225 /**
226 * set_smb2_rsp_status() - set error response code on smb2 header
227 * @work: smb work containing response buffer
228 * @err: error response code
229 */
230 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
231 {
232 struct smb2_hdr *rsp_hdr;
233
234 rsp_hdr = smb2_get_msg(work->response_buf);
235 rsp_hdr->Status = err;
236
237 work->iov_idx = 0;
238 work->iov_cnt = 0;
239 work->next_smb2_rcv_hdr_off = 0;
240 smb2_set_err_rsp(work);
241 }
242
243 /**
244 * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
245 * @work: smb work containing smb request buffer
246 *
247 * smb2 negotiate response is sent in reply of smb1 negotiate command for
248 * dialect auto-negotiation.
249 */
250 int init_smb2_neg_rsp(struct ksmbd_work *work)
251 {
252 struct smb2_hdr *rsp_hdr;
253 struct smb2_negotiate_rsp *rsp;
254 struct ksmbd_conn *conn = work->conn;
255 int err;
256
257 rsp_hdr = smb2_get_msg(work->response_buf);
258 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
259 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
260 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
261 rsp_hdr->CreditRequest = cpu_to_le16(2);
262 rsp_hdr->Command = SMB2_NEGOTIATE;
263 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
264 rsp_hdr->NextCommand = 0;
265 rsp_hdr->MessageId = 0;
266 rsp_hdr->Id.SyncId.ProcessId = 0;
267 rsp_hdr->Id.SyncId.TreeId = 0;
268 rsp_hdr->SessionId = 0;
269 memset(rsp_hdr->Signature, 0, 16);
270
271 rsp = smb2_get_msg(work->response_buf);
272
273 WARN_ON(ksmbd_conn_good(conn));
274
275 rsp->StructureSize = cpu_to_le16(65);
276 ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
277 rsp->DialectRevision = cpu_to_le16(conn->dialect);
278 /* Not setting conn guid rsp->ServerGUID, as it
279 * not used by client for identifying connection
280 */
281 rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
282 /* Default Max Message Size till SMB2.0, 64K*/
283 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
284 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
285 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
286
287 rsp->SystemTime = cpu_to_le64(ksmbd_systime());
288 rsp->ServerStartTime = 0;
289
290 rsp->SecurityBufferOffset = cpu_to_le16(128);
291 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
292 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
293 le16_to_cpu(rsp->SecurityBufferOffset));
294 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
295 if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
296 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
297 err = ksmbd_iov_pin_rsp(work, rsp,
298 sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH);
299 if (err)
300 return err;
301 conn->use_spnego = true;
302
303 ksmbd_conn_set_need_negotiate(conn);
304 return 0;
305 }
306
307 /**
308 * smb2_set_rsp_credits() - set number of credits in response buffer
309 * @work: smb work containing smb response buffer
310 */
311 int smb2_set_rsp_credits(struct ksmbd_work *work)
312 {
313 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
314 struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
315 struct ksmbd_conn *conn = work->conn;
316 unsigned short credits_requested, aux_max;
317 unsigned short credit_charge, credits_granted = 0;
318
319 if (work->send_no_response)
320 return 0;
321
322 hdr->CreditCharge = req_hdr->CreditCharge;
323
324 if (conn->total_credits > conn->vals->max_credits) {
325 hdr->CreditRequest = 0;
326 pr_err("Total credits overflow: %d\n", conn->total_credits);
327 return -EINVAL;
328 }
329
330 credit_charge = max_t(unsigned short,
331 le16_to_cpu(req_hdr->CreditCharge), 1);
332 if (credit_charge > conn->total_credits) {
333 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",
334 credit_charge, conn->total_credits);
335 return -EINVAL;
336 }
337
338 conn->total_credits -= credit_charge;
339 conn->outstanding_credits -= credit_charge;
340 credits_requested = max_t(unsigned short,
341 le16_to_cpu(req_hdr->CreditRequest), 1);
342
343 /* according to smb2.credits smbtorture, Windows server
344 * 2016 or later grant up to 8192 credits at once.
345 *
346 * TODO: Need to adjuct CreditRequest value according to
347 * current cpu load
348 */
349 if (hdr->Command == SMB2_NEGOTIATE)
350 aux_max = 1;
351 else
352 aux_max = conn->vals->max_credits - conn->total_credits;
353 credits_granted = min_t(unsigned short, credits_requested, aux_max);
354
355 conn->total_credits += credits_granted;
356 work->credits_granted += credits_granted;
357
358 if (!req_hdr->NextCommand) {
359 /* Update CreditRequest in last request */
360 hdr->CreditRequest = cpu_to_le16(work->credits_granted);
361 }
362 ksmbd_debug(SMB,
363 "credits: requested[%d] granted[%d] total_granted[%d]\n",
364 credits_requested, credits_granted,
365 conn->total_credits);
366 return 0;
367 }
368
369 /**
370 * init_chained_smb2_rsp() - initialize smb2 chained response
371 * @work: smb work containing smb response buffer
372 */
373 static void init_chained_smb2_rsp(struct ksmbd_work *work)
374 {
375 struct smb2_hdr *req = ksmbd_req_buf_next(work);
376 struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
377 struct smb2_hdr *rsp_hdr;
378 struct smb2_hdr *rcv_hdr;
379 int next_hdr_offset = 0;
380 int len, new_len;
381
382 /* Len of this response = updated RFC len - offset of previous cmd
383 * in the compound rsp
384 */
385
386 /* Storing the current local FID which may be needed by subsequent
387 * command in the compound request
388 */
389 if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
390 work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId;
391 work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId;
392 work->compound_sid = le64_to_cpu(rsp->SessionId);
393 }
394
395 len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
396 next_hdr_offset = le32_to_cpu(req->NextCommand);
397
398 new_len = ALIGN(len, 8);
399 work->iov[work->iov_idx].iov_len += (new_len - len);
400 inc_rfc1001_len(work->response_buf, new_len - len);
401 rsp->NextCommand = cpu_to_le32(new_len);
402
403 work->next_smb2_rcv_hdr_off += next_hdr_offset;
404 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
405 work->next_smb2_rsp_hdr_off += new_len;
406 ksmbd_debug(SMB,
407 "Compound req new_len = %d rcv off = %d rsp off = %d\n",
408 new_len, work->next_smb2_rcv_hdr_off,
409 work->next_smb2_rsp_hdr_off);
410
411 rsp_hdr = ksmbd_resp_buf_next(work);
412 rcv_hdr = ksmbd_req_buf_next(work);
413
414 if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
415 ksmbd_debug(SMB, "related flag should be set\n");
416 work->compound_fid = KSMBD_NO_FID;
417 work->compound_pfid = KSMBD_NO_FID;
418 }
419 memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
420 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
421 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
422 rsp_hdr->Command = rcv_hdr->Command;
423
424 /*
425 * Message is response. We don't grant oplock yet.
426 */
427 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
428 SMB2_FLAGS_RELATED_OPERATIONS);
429 rsp_hdr->NextCommand = 0;
430 rsp_hdr->MessageId = rcv_hdr->MessageId;
431 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
432 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
433 rsp_hdr->SessionId = rcv_hdr->SessionId;
434 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
435 }
436
437 /**
438 * is_chained_smb2_message() - check for chained command
439 * @work: smb work containing smb request buffer
440 *
441 * Return: true if chained request, otherwise false
442 */
443 bool is_chained_smb2_message(struct ksmbd_work *work)
444 {
445 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
446 unsigned int len, next_cmd;
447
448 if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
449 return false;
450
451 hdr = ksmbd_req_buf_next(work);
452 next_cmd = le32_to_cpu(hdr->NextCommand);
453 if (next_cmd > 0) {
454 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
455 __SMB2_HEADER_STRUCTURE_SIZE >
456 get_rfc1002_len(work->request_buf)) {
457 pr_err("next command(%u) offset exceeds smb msg size\n",
458 next_cmd);
459 return false;
460 }
461
462 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
463 work->response_sz) {
464 pr_err("next response offset exceeds response buffer size\n");
465 return false;
466 }
467
468 ksmbd_debug(SMB, "got SMB2 chained command\n");
469 init_chained_smb2_rsp(work);
470 return true;
471 } else if (work->next_smb2_rcv_hdr_off) {
472 /*
473 * This is last request in chained command,
474 * align response to 8 byte
475 */
476 len = ALIGN(get_rfc1002_len(work->response_buf), 8);
477 len = len - get_rfc1002_len(work->response_buf);
478 if (len) {
479 ksmbd_debug(SMB, "padding len %u\n", len);
480 work->iov[work->iov_idx].iov_len += len;
481 inc_rfc1001_len(work->response_buf, len);
482 }
483 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
484 }
485 return false;
486 }
487
488 /**
489 * init_smb2_rsp_hdr() - initialize smb2 response
490 * @work: smb work containing smb request buffer
491 *
492 * Return: 0
493 */
494 int init_smb2_rsp_hdr(struct ksmbd_work *work)
495 {
496 struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf);
497 struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf);
498
499 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
500 rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
501 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
502 rsp_hdr->Command = rcv_hdr->Command;
503
504 /*
505 * Message is response. We don't grant oplock yet.
506 */
507 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
508 rsp_hdr->NextCommand = 0;
509 rsp_hdr->MessageId = rcv_hdr->MessageId;
510 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
511 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
512 rsp_hdr->SessionId = rcv_hdr->SessionId;
513 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
514
515 return 0;
516 }
517
518 /**
519 * smb2_allocate_rsp_buf() - allocate smb2 response buffer
520 * @work: smb work containing smb request buffer
521 *
522 * Return: 0 on success, otherwise error
523 */
524 int smb2_allocate_rsp_buf(struct ksmbd_work *work)
525 {
526 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
527 size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
528 size_t large_sz = small_sz + work->conn->vals->max_trans_size;
529 size_t sz = small_sz;
530 int cmd = le16_to_cpu(hdr->Command);
531
532 if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)
533 sz = large_sz;
534
535 if (cmd == SMB2_QUERY_INFO_HE) {
536 struct smb2_query_info_req *req;
537
538 if (get_rfc1002_len(work->request_buf) <
539 offsetof(struct smb2_query_info_req, OutputBufferLength))
540 return -EINVAL;
541
542 req = smb2_get_msg(work->request_buf);
543 if ((req->InfoType == SMB2_O_INFO_FILE &&
544 (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
545 req->FileInfoClass == FILE_ALL_INFORMATION)) ||
546 req->InfoType == SMB2_O_INFO_SECURITY)
547 sz = large_sz;
548 }
549
550 /* allocate large response buf for chained commands */
551 if (le32_to_cpu(hdr->NextCommand) > 0)
552 sz = large_sz;
553
554 work->response_buf = kvzalloc(sz, GFP_KERNEL);
555 if (!work->response_buf)
556 return -ENOMEM;
557
558 work->response_sz = sz;
559 return 0;
560 }
561
562 /**
563 * smb2_check_user_session() - check for valid session for a user
564 * @work: smb work containing smb request buffer
565 *
566 * Return: 0 on success, otherwise error
567 */
568 int smb2_check_user_session(struct ksmbd_work *work)
569 {
570 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
571 struct ksmbd_conn *conn = work->conn;
572 unsigned int cmd = le16_to_cpu(req_hdr->Command);
573 unsigned long long sess_id;
574
575 /*
576 * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
577 * require a session id, so no need to validate user session's for
578 * these commands.
579 */
580 if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
581 cmd == SMB2_SESSION_SETUP_HE)
582 return 0;
583
584 if (!ksmbd_conn_good(conn))
585 return -EIO;
586
587 sess_id = le64_to_cpu(req_hdr->SessionId);
588
589 /*
590 * If request is not the first in Compound request,
591 * Just validate session id in header with work->sess->id.
592 */
593 if (work->next_smb2_rcv_hdr_off) {
594 if (!work->sess) {
595 pr_err("The first operation in the compound does not have sess\n");
596 return -EINVAL;
597 }
598 if (sess_id != ULLONG_MAX && work->sess->id != sess_id) {
599 pr_err("session id(%llu) is different with the first operation(%lld)\n",
600 sess_id, work->sess->id);
601 return -EINVAL;
602 }
603 return 1;
604 }
605
606 /* Check for validity of user session */
607 work->sess = ksmbd_session_lookup_all(conn, sess_id);
608 if (work->sess)
609 return 1;
610 ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
611 return -ENOENT;
612 }
613
614 /**
615 * smb2_get_name() - get filename string from on the wire smb format
616 * @src: source buffer
617 * @maxlen: maxlen of source string
618 * @local_nls: nls_table pointer
619 *
620 * Return: matching converted filename on success, otherwise error ptr
621 */
622 static char *
623 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)
624 {
625 char *name;
626
627 name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
628 if (IS_ERR(name)) {
629 pr_err("failed to get name %ld\n", PTR_ERR(name));
630 return name;
631 }
632
633 if (*name == '\\') {
634 pr_err("not allow directory name included leading slash\n");
635 kfree(name);
636 return ERR_PTR(-EINVAL);
637 }
638
639 ksmbd_conv_path_to_unix(name);
640 ksmbd_strip_last_slash(name);
641 return name;
642 }
643
644 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
645 {
646 struct ksmbd_conn *conn = work->conn;
647 int id;
648
649 id = ksmbd_acquire_async_msg_id(&conn->async_ida);
650 if (id < 0) {
651 pr_err("Failed to alloc async message id\n");
652 return id;
653 }
654 work->asynchronous = true;
655 work->async_id = id;
656
657 ksmbd_debug(SMB,
658 "Send interim Response to inform async request id : %d\n",
659 work->async_id);
660
661 work->cancel_fn = fn;
662 work->cancel_argv = arg;
663
664 if (list_empty(&work->async_request_entry)) {
665 spin_lock(&conn->request_lock);
666 list_add_tail(&work->async_request_entry, &conn->async_requests);
667 spin_unlock(&conn->request_lock);
668 }
669
670 return 0;
671 }
672
673 void release_async_work(struct ksmbd_work *work)
674 {
675 struct ksmbd_conn *conn = work->conn;
676
677 spin_lock(&conn->request_lock);
678 list_del_init(&work->async_request_entry);
679 spin_unlock(&conn->request_lock);
680
681 work->asynchronous = 0;
682 work->cancel_fn = NULL;
683 kfree(work->cancel_argv);
684 work->cancel_argv = NULL;
685 if (work->async_id) {
686 ksmbd_release_id(&conn->async_ida, work->async_id);
687 work->async_id = 0;
688 }
689 }
690
691 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
692 {
693 struct smb2_hdr *rsp_hdr;
694 struct ksmbd_work *in_work = ksmbd_alloc_work_struct();
695
696 if (allocate_interim_rsp_buf(in_work)) {
697 pr_err("smb_allocate_rsp_buf failed!\n");
698 ksmbd_free_work_struct(in_work);
699 return;
700 }
701
702 in_work->conn = work->conn;
703 memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work),
704 __SMB2_HEADER_STRUCTURE_SIZE);
705
706 rsp_hdr = smb2_get_msg(in_work->response_buf);
707 rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
708 rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id);
709 smb2_set_err_rsp(in_work);
710 rsp_hdr->Status = status;
711
712 ksmbd_conn_write(in_work);
713 ksmbd_free_work_struct(in_work);
714 }
715
716 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
717 {
718 if (S_ISDIR(mode) || S_ISREG(mode))
719 return 0;
720
721 if (S_ISLNK(mode))
722 return IO_REPARSE_TAG_LX_SYMLINK_LE;
723 else if (S_ISFIFO(mode))
724 return IO_REPARSE_TAG_LX_FIFO_LE;
725 else if (S_ISSOCK(mode))
726 return IO_REPARSE_TAG_AF_UNIX_LE;
727 else if (S_ISCHR(mode))
728 return IO_REPARSE_TAG_LX_CHR_LE;
729 else if (S_ISBLK(mode))
730 return IO_REPARSE_TAG_LX_BLK_LE;
731
732 return 0;
733 }
734
735 /**
736 * smb2_get_dos_mode() - get file mode in dos format from unix mode
737 * @stat: kstat containing file mode
738 * @attribute: attribute flags
739 *
740 * Return: converted dos mode
741 */
742 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
743 {
744 int attr = 0;
745
746 if (S_ISDIR(stat->mode)) {
747 attr = FILE_ATTRIBUTE_DIRECTORY |
748 (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
749 } else {
750 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
751 attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
752 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
753 FILE_SUPPORTS_SPARSE_FILES))
754 attr |= FILE_ATTRIBUTE_SPARSE_FILE;
755
756 if (smb2_get_reparse_tag_special_file(stat->mode))
757 attr |= FILE_ATTRIBUTE_REPARSE_POINT;
758 }
759
760 return attr;
761 }
762
763 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
764 __le16 hash_id)
765 {
766 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
767 pneg_ctxt->DataLength = cpu_to_le16(38);
768 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
769 pneg_ctxt->Reserved = cpu_to_le32(0);
770 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
771 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
772 pneg_ctxt->HashAlgorithms = hash_id;
773 }
774
775 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
776 __le16 cipher_type)
777 {
778 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
779 pneg_ctxt->DataLength = cpu_to_le16(4);
780 pneg_ctxt->Reserved = cpu_to_le32(0);
781 pneg_ctxt->CipherCount = cpu_to_le16(1);
782 pneg_ctxt->Ciphers[0] = cipher_type;
783 }
784
785 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
786 __le16 sign_algo)
787 {
788 pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
789 pneg_ctxt->DataLength =
790 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
791 - sizeof(struct smb2_neg_context));
792 pneg_ctxt->Reserved = cpu_to_le32(0);
793 pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
794 pneg_ctxt->SigningAlgorithms[0] = sign_algo;
795 }
796
797 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
798 {
799 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
800 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
801 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
802 pneg_ctxt->Name[0] = 0x93;
803 pneg_ctxt->Name[1] = 0xAD;
804 pneg_ctxt->Name[2] = 0x25;
805 pneg_ctxt->Name[3] = 0x50;
806 pneg_ctxt->Name[4] = 0x9C;
807 pneg_ctxt->Name[5] = 0xB4;
808 pneg_ctxt->Name[6] = 0x11;
809 pneg_ctxt->Name[7] = 0xE7;
810 pneg_ctxt->Name[8] = 0xB4;
811 pneg_ctxt->Name[9] = 0x23;
812 pneg_ctxt->Name[10] = 0x83;
813 pneg_ctxt->Name[11] = 0xDE;
814 pneg_ctxt->Name[12] = 0x96;
815 pneg_ctxt->Name[13] = 0x8B;
816 pneg_ctxt->Name[14] = 0xCD;
817 pneg_ctxt->Name[15] = 0x7C;
818 }
819
820 static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn,
821 struct smb2_negotiate_rsp *rsp)
822 {
823 char * const pneg_ctxt = (char *)rsp +
824 le32_to_cpu(rsp->NegotiateContextOffset);
825 int neg_ctxt_cnt = 1;
826 int ctxt_size;
827
828 ksmbd_debug(SMB,
829 "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
830 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
831 conn->preauth_info->Preauth_HashId);
832 ctxt_size = sizeof(struct smb2_preauth_neg_context);
833
834 if (conn->cipher_type) {
835 /* Round to 8 byte boundary */
836 ctxt_size = round_up(ctxt_size, 8);
837 ksmbd_debug(SMB,
838 "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
839 build_encrypt_ctxt((struct smb2_encryption_neg_context *)
840 (pneg_ctxt + ctxt_size),
841 conn->cipher_type);
842 neg_ctxt_cnt++;
843 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
844 }
845
846 /* compression context not yet supported */
847 WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE);
848
849 if (conn->posix_ext_supported) {
850 ctxt_size = round_up(ctxt_size, 8);
851 ksmbd_debug(SMB,
852 "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
853 build_posix_ctxt((struct smb2_posix_neg_context *)
854 (pneg_ctxt + ctxt_size));
855 neg_ctxt_cnt++;
856 ctxt_size += sizeof(struct smb2_posix_neg_context);
857 }
858
859 if (conn->signing_negotiated) {
860 ctxt_size = round_up(ctxt_size, 8);
861 ksmbd_debug(SMB,
862 "assemble SMB2_SIGNING_CAPABILITIES context\n");
863 build_sign_cap_ctxt((struct smb2_signing_capabilities *)
864 (pneg_ctxt + ctxt_size),
865 conn->signing_algorithm);
866 neg_ctxt_cnt++;
867 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
868 }
869
870 rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
871 return ctxt_size + AUTH_GSS_PADDING;
872 }
873
874 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
875 struct smb2_preauth_neg_context *pneg_ctxt,
876 int ctxt_len)
877 {
878 /*
879 * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt,
880 * which may not be present. Only check for used HashAlgorithms[1].
881 */
882 if (ctxt_len <
883 sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN)
884 return STATUS_INVALID_PARAMETER;
885
886 if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
887 return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
888
889 conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512;
890 return STATUS_SUCCESS;
891 }
892
893 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
894 struct smb2_encryption_neg_context *pneg_ctxt,
895 int ctxt_len)
896 {
897 int cph_cnt;
898 int i, cphs_size;
899
900 if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) {
901 pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n");
902 return;
903 }
904
905 conn->cipher_type = 0;
906
907 cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
908 cphs_size = cph_cnt * sizeof(__le16);
909
910 if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
911 ctxt_len) {
912 pr_err("Invalid cipher count(%d)\n", cph_cnt);
913 return;
914 }
915
916 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF)
917 return;
918
919 for (i = 0; i < cph_cnt; i++) {
920 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
921 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
922 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
923 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
924 ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
925 pneg_ctxt->Ciphers[i]);
926 conn->cipher_type = pneg_ctxt->Ciphers[i];
927 break;
928 }
929 }
930 }
931
932 /**
933 * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
934 * @conn: smb connection
935 *
936 * Return: true if connection should be encrypted, else false
937 */
938 bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
939 {
940 if (!conn->ops->generate_encryptionkey)
941 return false;
942
943 /*
944 * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
945 * SMB 3.1.1 uses the cipher_type field.
946 */
947 return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
948 conn->cipher_type;
949 }
950
951 static void decode_compress_ctxt(struct ksmbd_conn *conn,
952 struct smb2_compression_capabilities_context *pneg_ctxt)
953 {
954 conn->compress_algorithm = SMB3_COMPRESS_NONE;
955 }
956
957 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
958 struct smb2_signing_capabilities *pneg_ctxt,
959 int ctxt_len)
960 {
961 int sign_algo_cnt;
962 int i, sign_alos_size;
963
964 if (sizeof(struct smb2_signing_capabilities) > ctxt_len) {
965 pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n");
966 return;
967 }
968
969 conn->signing_negotiated = false;
970 sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
971 sign_alos_size = sign_algo_cnt * sizeof(__le16);
972
973 if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
974 ctxt_len) {
975 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
976 return;
977 }
978
979 for (i = 0; i < sign_algo_cnt; i++) {
980 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
981 pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
982 ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
983 pneg_ctxt->SigningAlgorithms[i]);
984 conn->signing_negotiated = true;
985 conn->signing_algorithm =
986 pneg_ctxt->SigningAlgorithms[i];
987 break;
988 }
989 }
990 }
991
992 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
993 struct smb2_negotiate_req *req,
994 unsigned int len_of_smb)
995 {
996 /* +4 is to account for the RFC1001 len field */
997 struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
998 int i = 0, len_of_ctxts;
999 unsigned int offset = le32_to_cpu(req->NegotiateContextOffset);
1000 unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
1001 __le32 status = STATUS_INVALID_PARAMETER;
1002
1003 ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
1004 if (len_of_smb <= offset) {
1005 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
1006 return status;
1007 }
1008
1009 len_of_ctxts = len_of_smb - offset;
1010
1011 while (i++ < neg_ctxt_cnt) {
1012 int clen, ctxt_len;
1013
1014 if (len_of_ctxts < (int)sizeof(struct smb2_neg_context))
1015 break;
1016
1017 pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1018 clen = le16_to_cpu(pctx->DataLength);
1019 ctxt_len = clen + sizeof(struct smb2_neg_context);
1020
1021 if (ctxt_len > len_of_ctxts)
1022 break;
1023
1024 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1025 ksmbd_debug(SMB,
1026 "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1027 if (conn->preauth_info->Preauth_HashId)
1028 break;
1029
1030 status = decode_preauth_ctxt(conn,
1031 (struct smb2_preauth_neg_context *)pctx,
1032 ctxt_len);
1033 if (status != STATUS_SUCCESS)
1034 break;
1035 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1036 ksmbd_debug(SMB,
1037 "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1038 if (conn->cipher_type)
1039 break;
1040
1041 decode_encrypt_ctxt(conn,
1042 (struct smb2_encryption_neg_context *)pctx,
1043 ctxt_len);
1044 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1045 ksmbd_debug(SMB,
1046 "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1047 if (conn->compress_algorithm)
1048 break;
1049
1050 decode_compress_ctxt(conn,
1051 (struct smb2_compression_capabilities_context *)pctx);
1052 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1053 ksmbd_debug(SMB,
1054 "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1055 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1056 ksmbd_debug(SMB,
1057 "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1058 conn->posix_ext_supported = true;
1059 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1060 ksmbd_debug(SMB,
1061 "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1062
1063 decode_sign_cap_ctxt(conn,
1064 (struct smb2_signing_capabilities *)pctx,
1065 ctxt_len);
1066 }
1067
1068 /* offsets must be 8 byte aligned */
1069 offset = (ctxt_len + 7) & ~0x7;
1070 len_of_ctxts -= offset;
1071 }
1072 return status;
1073 }
1074
1075 /**
1076 * smb2_handle_negotiate() - handler for smb2 negotiate command
1077 * @work: smb work containing smb request buffer
1078 *
1079 * Return: 0
1080 */
1081 int smb2_handle_negotiate(struct ksmbd_work *work)
1082 {
1083 struct ksmbd_conn *conn = work->conn;
1084 struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
1085 struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
1086 int rc = 0;
1087 unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0;
1088 __le32 status;
1089
1090 ksmbd_debug(SMB, "Received negotiate request\n");
1091 conn->need_neg = false;
1092 if (ksmbd_conn_good(conn)) {
1093 pr_err("conn->tcp_status is already in CifsGood State\n");
1094 work->send_no_response = 1;
1095 return rc;
1096 }
1097
1098 smb2_buf_len = get_rfc1002_len(work->request_buf);
1099 smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
1100 if (smb2_neg_size > smb2_buf_len) {
1101 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1102 rc = -EINVAL;
1103 goto err_out;
1104 }
1105
1106 if (req->DialectCount == 0) {
1107 pr_err("malformed packet\n");
1108 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1109 rc = -EINVAL;
1110 goto err_out;
1111 }
1112
1113 if (conn->dialect == SMB311_PROT_ID) {
1114 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1115
1116 if (smb2_buf_len < nego_ctxt_off) {
1117 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1118 rc = -EINVAL;
1119 goto err_out;
1120 }
1121
1122 if (smb2_neg_size > nego_ctxt_off) {
1123 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1124 rc = -EINVAL;
1125 goto err_out;
1126 }
1127
1128 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1129 nego_ctxt_off) {
1130 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1131 rc = -EINVAL;
1132 goto err_out;
1133 }
1134 } else {
1135 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1136 smb2_buf_len) {
1137 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1138 rc = -EINVAL;
1139 goto err_out;
1140 }
1141 }
1142
1143 conn->cli_cap = le32_to_cpu(req->Capabilities);
1144 switch (conn->dialect) {
1145 case SMB311_PROT_ID:
1146 conn->preauth_info =
1147 kzalloc(sizeof(struct preauth_integrity_info),
1148 GFP_KERNEL);
1149 if (!conn->preauth_info) {
1150 rc = -ENOMEM;
1151 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1152 goto err_out;
1153 }
1154
1155 status = deassemble_neg_contexts(conn, req,
1156 get_rfc1002_len(work->request_buf));
1157 if (status != STATUS_SUCCESS) {
1158 pr_err("deassemble_neg_contexts error(0x%x)\n",
1159 status);
1160 rsp->hdr.Status = status;
1161 rc = -EINVAL;
1162 kfree(conn->preauth_info);
1163 conn->preauth_info = NULL;
1164 goto err_out;
1165 }
1166
1167 rc = init_smb3_11_server(conn);
1168 if (rc < 0) {
1169 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1170 kfree(conn->preauth_info);
1171 conn->preauth_info = NULL;
1172 goto err_out;
1173 }
1174
1175 ksmbd_gen_preauth_integrity_hash(conn,
1176 work->request_buf,
1177 conn->preauth_info->Preauth_HashValue);
1178 rsp->NegotiateContextOffset =
1179 cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1180 neg_ctxt_len = assemble_neg_contexts(conn, rsp);
1181 break;
1182 case SMB302_PROT_ID:
1183 init_smb3_02_server(conn);
1184 break;
1185 case SMB30_PROT_ID:
1186 init_smb3_0_server(conn);
1187 break;
1188 case SMB21_PROT_ID:
1189 init_smb2_1_server(conn);
1190 break;
1191 case SMB2X_PROT_ID:
1192 case BAD_PROT_ID:
1193 default:
1194 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1195 conn->dialect);
1196 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1197 rc = -EINVAL;
1198 goto err_out;
1199 }
1200 rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1201
1202 /* For stats */
1203 conn->connection_type = conn->dialect;
1204
1205 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1206 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1207 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1208
1209 memcpy(conn->ClientGUID, req->ClientGUID,
1210 SMB2_CLIENT_GUID_SIZE);
1211 conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1212
1213 rsp->StructureSize = cpu_to_le16(65);
1214 rsp->DialectRevision = cpu_to_le16(conn->dialect);
1215 /* Not setting conn guid rsp->ServerGUID, as it
1216 * not used by client for identifying server
1217 */
1218 memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1219
1220 rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1221 rsp->ServerStartTime = 0;
1222 ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1223 le32_to_cpu(rsp->NegotiateContextOffset),
1224 le16_to_cpu(rsp->NegotiateContextCount));
1225
1226 rsp->SecurityBufferOffset = cpu_to_le16(128);
1227 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1228 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
1229 le16_to_cpu(rsp->SecurityBufferOffset));
1230
1231 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1232 conn->use_spnego = true;
1233
1234 if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1235 server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1236 req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1237 conn->sign = true;
1238 else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1239 server_conf.enforced_signing = true;
1240 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1241 conn->sign = true;
1242 }
1243
1244 conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1245 ksmbd_conn_set_need_negotiate(conn);
1246
1247 err_out:
1248 if (rc)
1249 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1250
1251 if (!rc)
1252 rc = ksmbd_iov_pin_rsp(work, rsp,
1253 sizeof(struct smb2_negotiate_rsp) +
1254 AUTH_GSS_LENGTH + neg_ctxt_len);
1255 if (rc < 0)
1256 smb2_set_err_rsp(work);
1257 return rc;
1258 }
1259
1260 static int alloc_preauth_hash(struct ksmbd_session *sess,
1261 struct ksmbd_conn *conn)
1262 {
1263 if (sess->Preauth_HashValue)
1264 return 0;
1265
1266 sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1267 PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
1268 if (!sess->Preauth_HashValue)
1269 return -ENOMEM;
1270
1271 return 0;
1272 }
1273
1274 static int generate_preauth_hash(struct ksmbd_work *work)
1275 {
1276 struct ksmbd_conn *conn = work->conn;
1277 struct ksmbd_session *sess = work->sess;
1278 u8 *preauth_hash;
1279
1280 if (conn->dialect != SMB311_PROT_ID)
1281 return 0;
1282
1283 if (conn->binding) {
1284 struct preauth_session *preauth_sess;
1285
1286 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1287 if (!preauth_sess) {
1288 preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1289 if (!preauth_sess)
1290 return -ENOMEM;
1291 }
1292
1293 preauth_hash = preauth_sess->Preauth_HashValue;
1294 } else {
1295 if (!sess->Preauth_HashValue)
1296 if (alloc_preauth_hash(sess, conn))
1297 return -ENOMEM;
1298 preauth_hash = sess->Preauth_HashValue;
1299 }
1300
1301 ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1302 return 0;
1303 }
1304
1305 static int decode_negotiation_token(struct ksmbd_conn *conn,
1306 struct negotiate_message *negblob,
1307 size_t sz)
1308 {
1309 if (!conn->use_spnego)
1310 return -EINVAL;
1311
1312 if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1313 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1314 conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1315 conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1316 conn->use_spnego = false;
1317 }
1318 }
1319 return 0;
1320 }
1321
1322 static int ntlm_negotiate(struct ksmbd_work *work,
1323 struct negotiate_message *negblob,
1324 size_t negblob_len, struct smb2_sess_setup_rsp *rsp)
1325 {
1326 struct challenge_message *chgblob;
1327 unsigned char *spnego_blob = NULL;
1328 u16 spnego_blob_len;
1329 char *neg_blob;
1330 int sz, rc;
1331
1332 ksmbd_debug(SMB, "negotiate phase\n");
1333 rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
1334 if (rc)
1335 return rc;
1336
1337 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1338 chgblob = (struct challenge_message *)rsp->Buffer;
1339 memset(chgblob, 0, sizeof(struct challenge_message));
1340
1341 if (!work->conn->use_spnego) {
1342 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1343 if (sz < 0)
1344 return -ENOMEM;
1345
1346 rsp->SecurityBufferLength = cpu_to_le16(sz);
1347 return 0;
1348 }
1349
1350 sz = sizeof(struct challenge_message);
1351 sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1352
1353 neg_blob = kzalloc(sz, GFP_KERNEL);
1354 if (!neg_blob)
1355 return -ENOMEM;
1356
1357 chgblob = (struct challenge_message *)neg_blob;
1358 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1359 if (sz < 0) {
1360 rc = -ENOMEM;
1361 goto out;
1362 }
1363
1364 rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1365 neg_blob, sz);
1366 if (rc) {
1367 rc = -ENOMEM;
1368 goto out;
1369 }
1370
1371 memcpy(rsp->Buffer, spnego_blob, spnego_blob_len);
1372 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1373
1374 out:
1375 kfree(spnego_blob);
1376 kfree(neg_blob);
1377 return rc;
1378 }
1379
1380 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1381 struct smb2_sess_setup_req *req)
1382 {
1383 int sz;
1384
1385 if (conn->use_spnego && conn->mechToken)
1386 return (struct authenticate_message *)conn->mechToken;
1387
1388 sz = le16_to_cpu(req->SecurityBufferOffset);
1389 return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1390 + sz);
1391 }
1392
1393 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1394 struct smb2_sess_setup_req *req)
1395 {
1396 struct authenticate_message *authblob;
1397 struct ksmbd_user *user;
1398 char *name;
1399 unsigned int name_off, name_len, secbuf_len;
1400
1401 if (conn->use_spnego && conn->mechToken)
1402 secbuf_len = conn->mechTokenLen;
1403 else
1404 secbuf_len = le16_to_cpu(req->SecurityBufferLength);
1405 if (secbuf_len < sizeof(struct authenticate_message)) {
1406 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
1407 return NULL;
1408 }
1409 authblob = user_authblob(conn, req);
1410 name_off = le32_to_cpu(authblob->UserName.BufferOffset);
1411 name_len = le16_to_cpu(authblob->UserName.Length);
1412
1413 if (secbuf_len < (u64)name_off + name_len)
1414 return NULL;
1415
1416 name = smb_strndup_from_utf16((const char *)authblob + name_off,
1417 name_len,
1418 true,
1419 conn->local_nls);
1420 if (IS_ERR(name)) {
1421 pr_err("cannot allocate memory\n");
1422 return NULL;
1423 }
1424
1425 ksmbd_debug(SMB, "session setup request for user %s\n", name);
1426 user = ksmbd_login_user(name);
1427 kfree(name);
1428 return user;
1429 }
1430
1431 static int ntlm_authenticate(struct ksmbd_work *work,
1432 struct smb2_sess_setup_req *req,
1433 struct smb2_sess_setup_rsp *rsp)
1434 {
1435 struct ksmbd_conn *conn = work->conn;
1436 struct ksmbd_session *sess = work->sess;
1437 struct channel *chann = NULL;
1438 struct ksmbd_user *user;
1439 u64 prev_id;
1440 int sz, rc;
1441
1442 ksmbd_debug(SMB, "authenticate phase\n");
1443 if (conn->use_spnego) {
1444 unsigned char *spnego_blob;
1445 u16 spnego_blob_len;
1446
1447 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1448 &spnego_blob_len,
1449 0);
1450 if (rc)
1451 return -ENOMEM;
1452
1453 memcpy(rsp->Buffer, spnego_blob, spnego_blob_len);
1454 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1455 kfree(spnego_blob);
1456 }
1457
1458 user = session_user(conn, req);
1459 if (!user) {
1460 ksmbd_debug(SMB, "Unknown user name or an error\n");
1461 return -EPERM;
1462 }
1463
1464 /* Check for previous session */
1465 prev_id = le64_to_cpu(req->PreviousSessionId);
1466 if (prev_id && prev_id != sess->id)
1467 destroy_previous_session(conn, user, prev_id);
1468
1469 if (sess->state == SMB2_SESSION_VALID) {
1470 /*
1471 * Reuse session if anonymous try to connect
1472 * on reauthetication.
1473 */
1474 if (conn->binding == false && ksmbd_anonymous_user(user)) {
1475 ksmbd_free_user(user);
1476 return 0;
1477 }
1478
1479 if (!ksmbd_compare_user(sess->user, user)) {
1480 ksmbd_free_user(user);
1481 return -EPERM;
1482 }
1483 ksmbd_free_user(user);
1484 } else {
1485 sess->user = user;
1486 }
1487
1488 if (conn->binding == false && user_guest(sess->user)) {
1489 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1490 } else {
1491 struct authenticate_message *authblob;
1492
1493 authblob = user_authblob(conn, req);
1494 if (conn->use_spnego && conn->mechToken)
1495 sz = conn->mechTokenLen;
1496 else
1497 sz = le16_to_cpu(req->SecurityBufferLength);
1498 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
1499 if (rc) {
1500 set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1501 ksmbd_debug(SMB, "authentication failed\n");
1502 return -EPERM;
1503 }
1504 }
1505
1506 /*
1507 * If session state is SMB2_SESSION_VALID, We can assume
1508 * that it is reauthentication. And the user/password
1509 * has been verified, so return it here.
1510 */
1511 if (sess->state == SMB2_SESSION_VALID) {
1512 if (conn->binding)
1513 goto binding_session;
1514 return 0;
1515 }
1516
1517 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1518 (conn->sign || server_conf.enforced_signing)) ||
1519 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1520 sess->sign = true;
1521
1522 if (smb3_encryption_negotiated(conn) &&
1523 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1524 rc = conn->ops->generate_encryptionkey(conn, sess);
1525 if (rc) {
1526 ksmbd_debug(SMB,
1527 "SMB3 encryption key generation failed\n");
1528 return -EINVAL;
1529 }
1530 sess->enc = true;
1531 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1532 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1533 /*
1534 * signing is disable if encryption is enable
1535 * on this session
1536 */
1537 sess->sign = false;
1538 }
1539
1540 binding_session:
1541 if (conn->dialect >= SMB30_PROT_ID) {
1542 chann = lookup_chann_list(sess, conn);
1543 if (!chann) {
1544 chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1545 if (!chann)
1546 return -ENOMEM;
1547
1548 chann->conn = conn;
1549 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1550 }
1551 }
1552
1553 if (conn->ops->generate_signingkey) {
1554 rc = conn->ops->generate_signingkey(sess, conn);
1555 if (rc) {
1556 ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1557 return -EINVAL;
1558 }
1559 }
1560
1561 if (!ksmbd_conn_lookup_dialect(conn)) {
1562 pr_err("fail to verify the dialect\n");
1563 return -ENOENT;
1564 }
1565 return 0;
1566 }
1567
1568 #ifdef CONFIG_SMB_SERVER_KERBEROS5
1569 static int krb5_authenticate(struct ksmbd_work *work,
1570 struct smb2_sess_setup_req *req,
1571 struct smb2_sess_setup_rsp *rsp)
1572 {
1573 struct ksmbd_conn *conn = work->conn;
1574 struct ksmbd_session *sess = work->sess;
1575 char *in_blob, *out_blob;
1576 struct channel *chann = NULL;
1577 u64 prev_sess_id;
1578 int in_len, out_len;
1579 int retval;
1580
1581 in_blob = (char *)&req->hdr.ProtocolId +
1582 le16_to_cpu(req->SecurityBufferOffset);
1583 in_len = le16_to_cpu(req->SecurityBufferLength);
1584 out_blob = (char *)&rsp->hdr.ProtocolId +
1585 le16_to_cpu(rsp->SecurityBufferOffset);
1586 out_len = work->response_sz -
1587 (le16_to_cpu(rsp->SecurityBufferOffset) + 4);
1588
1589 /* Check previous session */
1590 prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1591 if (prev_sess_id && prev_sess_id != sess->id)
1592 destroy_previous_session(conn, sess->user, prev_sess_id);
1593
1594 if (sess->state == SMB2_SESSION_VALID)
1595 ksmbd_free_user(sess->user);
1596
1597 retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1598 out_blob, &out_len);
1599 if (retval) {
1600 ksmbd_debug(SMB, "krb5 authentication failed\n");
1601 return -EINVAL;
1602 }
1603 rsp->SecurityBufferLength = cpu_to_le16(out_len);
1604
1605 if ((conn->sign || server_conf.enforced_signing) ||
1606 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1607 sess->sign = true;
1608
1609 if (smb3_encryption_negotiated(conn)) {
1610 retval = conn->ops->generate_encryptionkey(conn, sess);
1611 if (retval) {
1612 ksmbd_debug(SMB,
1613 "SMB3 encryption key generation failed\n");
1614 return -EINVAL;
1615 }
1616 sess->enc = true;
1617 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1618 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1619 sess->sign = false;
1620 }
1621
1622 if (conn->dialect >= SMB30_PROT_ID) {
1623 chann = lookup_chann_list(sess, conn);
1624 if (!chann) {
1625 chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1626 if (!chann)
1627 return -ENOMEM;
1628
1629 chann->conn = conn;
1630 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1631 }
1632 }
1633
1634 if (conn->ops->generate_signingkey) {
1635 retval = conn->ops->generate_signingkey(sess, conn);
1636 if (retval) {
1637 ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1638 return -EINVAL;
1639 }
1640 }
1641
1642 if (!ksmbd_conn_lookup_dialect(conn)) {
1643 pr_err("fail to verify the dialect\n");
1644 return -ENOENT;
1645 }
1646 return 0;
1647 }
1648 #else
1649 static int krb5_authenticate(struct ksmbd_work *work,
1650 struct smb2_sess_setup_req *req,
1651 struct smb2_sess_setup_rsp *rsp)
1652 {
1653 return -EOPNOTSUPP;
1654 }
1655 #endif
1656
1657 int smb2_sess_setup(struct ksmbd_work *work)
1658 {
1659 struct ksmbd_conn *conn = work->conn;
1660 struct smb2_sess_setup_req *req;
1661 struct smb2_sess_setup_rsp *rsp;
1662 struct ksmbd_session *sess;
1663 struct negotiate_message *negblob;
1664 unsigned int negblob_len, negblob_off;
1665 int rc = 0;
1666
1667 ksmbd_debug(SMB, "Received request for session setup\n");
1668
1669 WORK_BUFFERS(work, req, rsp);
1670
1671 rsp->StructureSize = cpu_to_le16(9);
1672 rsp->SessionFlags = 0;
1673 rsp->SecurityBufferOffset = cpu_to_le16(72);
1674 rsp->SecurityBufferLength = 0;
1675
1676 ksmbd_conn_lock(conn);
1677 if (!req->hdr.SessionId) {
1678 sess = ksmbd_smb2_session_create();
1679 if (!sess) {
1680 rc = -ENOMEM;
1681 goto out_err;
1682 }
1683 rsp->hdr.SessionId = cpu_to_le64(sess->id);
1684 rc = ksmbd_session_register(conn, sess);
1685 if (rc)
1686 goto out_err;
1687
1688 conn->binding = false;
1689 } else if (conn->dialect >= SMB30_PROT_ID &&
1690 (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1691 req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1692 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1693
1694 sess = ksmbd_session_lookup_slowpath(sess_id);
1695 if (!sess) {
1696 rc = -ENOENT;
1697 goto out_err;
1698 }
1699
1700 if (conn->dialect != sess->dialect) {
1701 rc = -EINVAL;
1702 goto out_err;
1703 }
1704
1705 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1706 rc = -EINVAL;
1707 goto out_err;
1708 }
1709
1710 if (strncmp(conn->ClientGUID, sess->ClientGUID,
1711 SMB2_CLIENT_GUID_SIZE)) {
1712 rc = -ENOENT;
1713 goto out_err;
1714 }
1715
1716 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1717 rc = -EACCES;
1718 goto out_err;
1719 }
1720
1721 if (sess->state == SMB2_SESSION_EXPIRED) {
1722 rc = -EFAULT;
1723 goto out_err;
1724 }
1725
1726 if (ksmbd_conn_need_reconnect(conn)) {
1727 rc = -EFAULT;
1728 sess = NULL;
1729 goto out_err;
1730 }
1731
1732 if (ksmbd_session_lookup(conn, sess_id)) {
1733 rc = -EACCES;
1734 goto out_err;
1735 }
1736
1737 if (user_guest(sess->user)) {
1738 rc = -EOPNOTSUPP;
1739 goto out_err;
1740 }
1741
1742 conn->binding = true;
1743 } else if ((conn->dialect < SMB30_PROT_ID ||
1744 server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1745 (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1746 sess = NULL;
1747 rc = -EACCES;
1748 goto out_err;
1749 } else {
1750 sess = ksmbd_session_lookup(conn,
1751 le64_to_cpu(req->hdr.SessionId));
1752 if (!sess) {
1753 rc = -ENOENT;
1754 goto out_err;
1755 }
1756
1757 if (sess->state == SMB2_SESSION_EXPIRED) {
1758 rc = -EFAULT;
1759 goto out_err;
1760 }
1761
1762 if (ksmbd_conn_need_reconnect(conn)) {
1763 rc = -EFAULT;
1764 sess = NULL;
1765 goto out_err;
1766 }
1767
1768 conn->binding = false;
1769 }
1770 work->sess = sess;
1771
1772 negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1773 negblob_len = le16_to_cpu(req->SecurityBufferLength);
1774 if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) {
1775 rc = -EINVAL;
1776 goto out_err;
1777 }
1778
1779 negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1780 negblob_off);
1781
1782 if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1783 if (conn->mechToken) {
1784 negblob = (struct negotiate_message *)conn->mechToken;
1785 negblob_len = conn->mechTokenLen;
1786 }
1787 }
1788
1789 if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1790 rc = -EINVAL;
1791 goto out_err;
1792 }
1793
1794 if (server_conf.auth_mechs & conn->auth_mechs) {
1795 rc = generate_preauth_hash(work);
1796 if (rc)
1797 goto out_err;
1798
1799 if (conn->preferred_auth_mech &
1800 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1801 rc = krb5_authenticate(work, req, rsp);
1802 if (rc) {
1803 rc = -EINVAL;
1804 goto out_err;
1805 }
1806
1807 if (!ksmbd_conn_need_reconnect(conn)) {
1808 ksmbd_conn_set_good(conn);
1809 sess->state = SMB2_SESSION_VALID;
1810 }
1811 kfree(sess->Preauth_HashValue);
1812 sess->Preauth_HashValue = NULL;
1813 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1814 if (negblob->MessageType == NtLmNegotiate) {
1815 rc = ntlm_negotiate(work, negblob, negblob_len, rsp);
1816 if (rc)
1817 goto out_err;
1818 rsp->hdr.Status =
1819 STATUS_MORE_PROCESSING_REQUIRED;
1820 } else if (negblob->MessageType == NtLmAuthenticate) {
1821 rc = ntlm_authenticate(work, req, rsp);
1822 if (rc)
1823 goto out_err;
1824
1825 if (!ksmbd_conn_need_reconnect(conn)) {
1826 ksmbd_conn_set_good(conn);
1827 sess->state = SMB2_SESSION_VALID;
1828 }
1829 if (conn->binding) {
1830 struct preauth_session *preauth_sess;
1831
1832 preauth_sess =
1833 ksmbd_preauth_session_lookup(conn, sess->id);
1834 if (preauth_sess) {
1835 list_del(&preauth_sess->preauth_entry);
1836 kfree(preauth_sess);
1837 }
1838 }
1839 kfree(sess->Preauth_HashValue);
1840 sess->Preauth_HashValue = NULL;
1841 } else {
1842 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",
1843 le32_to_cpu(negblob->MessageType));
1844 rc = -EINVAL;
1845 }
1846 } else {
1847 /* TODO: need one more negotiation */
1848 pr_err("Not support the preferred authentication\n");
1849 rc = -EINVAL;
1850 }
1851 } else {
1852 pr_err("Not support authentication\n");
1853 rc = -EINVAL;
1854 }
1855
1856 out_err:
1857 if (rc == -EINVAL)
1858 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1859 else if (rc == -ENOENT)
1860 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1861 else if (rc == -EACCES)
1862 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1863 else if (rc == -EFAULT)
1864 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1865 else if (rc == -ENOMEM)
1866 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1867 else if (rc == -EOPNOTSUPP)
1868 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1869 else if (rc)
1870 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1871
1872 if (conn->use_spnego && conn->mechToken) {
1873 kfree(conn->mechToken);
1874 conn->mechToken = NULL;
1875 }
1876
1877 if (rc < 0) {
1878 /*
1879 * SecurityBufferOffset should be set to zero
1880 * in session setup error response.
1881 */
1882 rsp->SecurityBufferOffset = 0;
1883
1884 if (sess) {
1885 bool try_delay = false;
1886
1887 /*
1888 * To avoid dictionary attacks (repeated session setups rapidly sent) to
1889 * connect to server, ksmbd make a delay of a 5 seconds on session setup
1890 * failure to make it harder to send enough random connection requests
1891 * to break into a server.
1892 */
1893 if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1894 try_delay = true;
1895
1896 sess->last_active = jiffies;
1897 sess->state = SMB2_SESSION_EXPIRED;
1898 if (try_delay) {
1899 ksmbd_conn_set_need_reconnect(conn);
1900 ssleep(5);
1901 ksmbd_conn_set_need_negotiate(conn);
1902 }
1903 }
1904 smb2_set_err_rsp(work);
1905 } else {
1906 unsigned int iov_len;
1907
1908 if (rsp->SecurityBufferLength)
1909 iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) +
1910 le16_to_cpu(rsp->SecurityBufferLength);
1911 else
1912 iov_len = sizeof(struct smb2_sess_setup_rsp);
1913 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len);
1914 if (rc)
1915 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1916 }
1917
1918 ksmbd_conn_unlock(conn);
1919 return rc;
1920 }
1921
1922 /**
1923 * smb2_tree_connect() - handler for smb2 tree connect command
1924 * @work: smb work containing smb request buffer
1925 *
1926 * Return: 0 on success, otherwise error
1927 */
1928 int smb2_tree_connect(struct ksmbd_work *work)
1929 {
1930 struct ksmbd_conn *conn = work->conn;
1931 struct smb2_tree_connect_req *req;
1932 struct smb2_tree_connect_rsp *rsp;
1933 struct ksmbd_session *sess = work->sess;
1934 char *treename = NULL, *name = NULL;
1935 struct ksmbd_tree_conn_status status;
1936 struct ksmbd_share_config *share = NULL;
1937 int rc = -EINVAL;
1938
1939 WORK_BUFFERS(work, req, rsp);
1940
1941 treename = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->PathOffset),
1942 le16_to_cpu(req->PathLength), true,
1943 conn->local_nls);
1944 if (IS_ERR(treename)) {
1945 pr_err("treename is NULL\n");
1946 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1947 goto out_err1;
1948 }
1949
1950 name = ksmbd_extract_sharename(conn->um, treename);
1951 if (IS_ERR(name)) {
1952 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1953 goto out_err1;
1954 }
1955
1956 ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1957 name, treename);
1958
1959 status = ksmbd_tree_conn_connect(work, name);
1960 if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1961 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1962 else
1963 goto out_err1;
1964
1965 share = status.tree_conn->share_conf;
1966 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1967 ksmbd_debug(SMB, "IPC share path request\n");
1968 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1969 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1970 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1971 FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1972 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1973 FILE_SYNCHRONIZE_LE;
1974 } else {
1975 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1976 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1977 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1978 if (test_tree_conn_flag(status.tree_conn,
1979 KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1980 rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1981 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1982 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1983 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1984 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1985 FILE_SYNCHRONIZE_LE;
1986 }
1987 }
1988
1989 status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1990 if (conn->posix_ext_supported)
1991 status.tree_conn->posix_extensions = true;
1992
1993 write_lock(&sess->tree_conns_lock);
1994 status.tree_conn->t_state = TREE_CONNECTED;
1995 write_unlock(&sess->tree_conns_lock);
1996 rsp->StructureSize = cpu_to_le16(16);
1997 out_err1:
1998 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && share &&
1999 test_share_config_flag(share,
2000 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))
2001 rsp->Capabilities = SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY;
2002 else
2003 rsp->Capabilities = 0;
2004 rsp->Reserved = 0;
2005 /* default manual caching */
2006 rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
2007
2008 rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp));
2009 if (rc)
2010 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM;
2011
2012 if (!IS_ERR(treename))
2013 kfree(treename);
2014 if (!IS_ERR(name))
2015 kfree(name);
2016
2017 switch (status.ret) {
2018 case KSMBD_TREE_CONN_STATUS_OK:
2019 rsp->hdr.Status = STATUS_SUCCESS;
2020 rc = 0;
2021 break;
2022 case -ESTALE:
2023 case -ENOENT:
2024 case KSMBD_TREE_CONN_STATUS_NO_SHARE:
2025 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
2026 break;
2027 case -ENOMEM:
2028 case KSMBD_TREE_CONN_STATUS_NOMEM:
2029 rsp->hdr.Status = STATUS_NO_MEMORY;
2030 break;
2031 case KSMBD_TREE_CONN_STATUS_ERROR:
2032 case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
2033 case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
2034 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2035 break;
2036 case -EINVAL:
2037 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2038 break;
2039 default:
2040 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2041 }
2042
2043 if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
2044 smb2_set_err_rsp(work);
2045
2046 return rc;
2047 }
2048
2049 /**
2050 * smb2_create_open_flags() - convert smb open flags to unix open flags
2051 * @file_present: is file already present
2052 * @access: file access flags
2053 * @disposition: file disposition flags
2054 * @may_flags: set with MAY_ flags
2055 * @coptions: file creation options
2056 * @mode: file mode
2057 *
2058 * Return: file open flags
2059 */
2060 static int smb2_create_open_flags(bool file_present, __le32 access,
2061 __le32 disposition,
2062 int *may_flags,
2063 __le32 coptions,
2064 umode_t mode)
2065 {
2066 int oflags = O_NONBLOCK | O_LARGEFILE;
2067
2068 if (coptions & FILE_DIRECTORY_FILE_LE || S_ISDIR(mode)) {
2069 access &= ~FILE_WRITE_DESIRE_ACCESS_LE;
2070 ksmbd_debug(SMB, "Discard write access to a directory\n");
2071 }
2072
2073 if (access & FILE_READ_DESIRED_ACCESS_LE &&
2074 access & FILE_WRITE_DESIRE_ACCESS_LE) {
2075 oflags |= O_RDWR;
2076 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
2077 } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
2078 oflags |= O_WRONLY;
2079 *may_flags = MAY_OPEN | MAY_WRITE;
2080 } else {
2081 oflags |= O_RDONLY;
2082 *may_flags = MAY_OPEN | MAY_READ;
2083 }
2084
2085 if (access == FILE_READ_ATTRIBUTES_LE || S_ISBLK(mode) || S_ISCHR(mode))
2086 oflags |= O_PATH;
2087
2088 if (file_present) {
2089 switch (disposition & FILE_CREATE_MASK_LE) {
2090 case FILE_OPEN_LE:
2091 case FILE_CREATE_LE:
2092 break;
2093 case FILE_SUPERSEDE_LE:
2094 case FILE_OVERWRITE_LE:
2095 case FILE_OVERWRITE_IF_LE:
2096 oflags |= O_TRUNC;
2097 break;
2098 default:
2099 break;
2100 }
2101 } else {
2102 switch (disposition & FILE_CREATE_MASK_LE) {
2103 case FILE_SUPERSEDE_LE:
2104 case FILE_CREATE_LE:
2105 case FILE_OPEN_IF_LE:
2106 case FILE_OVERWRITE_IF_LE:
2107 oflags |= O_CREAT;
2108 break;
2109 case FILE_OPEN_LE:
2110 case FILE_OVERWRITE_LE:
2111 oflags &= ~O_CREAT;
2112 break;
2113 default:
2114 break;
2115 }
2116 }
2117
2118 return oflags;
2119 }
2120
2121 /**
2122 * smb2_tree_disconnect() - handler for smb tree connect request
2123 * @work: smb work containing request buffer
2124 *
2125 * Return: 0
2126 */
2127 int smb2_tree_disconnect(struct ksmbd_work *work)
2128 {
2129 struct smb2_tree_disconnect_rsp *rsp;
2130 struct smb2_tree_disconnect_req *req;
2131 struct ksmbd_session *sess = work->sess;
2132 struct ksmbd_tree_connect *tcon = work->tcon;
2133 int err;
2134
2135 WORK_BUFFERS(work, req, rsp);
2136
2137 ksmbd_debug(SMB, "request\n");
2138
2139 if (!tcon) {
2140 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2141
2142 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2143 err = -ENOENT;
2144 goto err_out;
2145 }
2146
2147 ksmbd_close_tree_conn_fds(work);
2148
2149 write_lock(&sess->tree_conns_lock);
2150 if (tcon->t_state == TREE_DISCONNECTED) {
2151 write_unlock(&sess->tree_conns_lock);
2152 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2153 err = -ENOENT;
2154 goto err_out;
2155 }
2156
2157 WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount));
2158 tcon->t_state = TREE_DISCONNECTED;
2159 write_unlock(&sess->tree_conns_lock);
2160
2161 err = ksmbd_tree_conn_disconnect(sess, tcon);
2162 if (err) {
2163 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2164 goto err_out;
2165 }
2166
2167 work->tcon = NULL;
2168
2169 rsp->StructureSize = cpu_to_le16(4);
2170 err = ksmbd_iov_pin_rsp(work, rsp,
2171 sizeof(struct smb2_tree_disconnect_rsp));
2172 if (err) {
2173 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2174 goto err_out;
2175 }
2176
2177 return 0;
2178
2179 err_out:
2180 smb2_set_err_rsp(work);
2181 return err;
2182
2183 }
2184
2185 /**
2186 * smb2_session_logoff() - handler for session log off request
2187 * @work: smb work containing request buffer
2188 *
2189 * Return: 0
2190 */
2191 int smb2_session_logoff(struct ksmbd_work *work)
2192 {
2193 struct ksmbd_conn *conn = work->conn;
2194 struct smb2_logoff_req *req;
2195 struct smb2_logoff_rsp *rsp;
2196 struct ksmbd_session *sess;
2197 u64 sess_id;
2198 int err;
2199
2200 WORK_BUFFERS(work, req, rsp);
2201
2202 ksmbd_debug(SMB, "request\n");
2203
2204 ksmbd_conn_lock(conn);
2205 if (!ksmbd_conn_good(conn)) {
2206 ksmbd_conn_unlock(conn);
2207 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2208 smb2_set_err_rsp(work);
2209 return -ENOENT;
2210 }
2211 sess_id = le64_to_cpu(req->hdr.SessionId);
2212 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT);
2213 ksmbd_conn_unlock(conn);
2214
2215 ksmbd_close_session_fds(work);
2216 ksmbd_conn_wait_idle(conn);
2217
2218 /*
2219 * Re-lookup session to validate if session is deleted
2220 * while waiting request complete
2221 */
2222 sess = ksmbd_session_lookup_all(conn, sess_id);
2223 if (ksmbd_tree_conn_session_logoff(sess)) {
2224 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2225 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2226 smb2_set_err_rsp(work);
2227 return -ENOENT;
2228 }
2229
2230 ksmbd_destroy_file_table(&sess->file_table);
2231 sess->state = SMB2_SESSION_EXPIRED;
2232
2233 ksmbd_free_user(sess->user);
2234 sess->user = NULL;
2235 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE);
2236
2237 rsp->StructureSize = cpu_to_le16(4);
2238 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp));
2239 if (err) {
2240 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2241 smb2_set_err_rsp(work);
2242 return err;
2243 }
2244 return 0;
2245 }
2246
2247 /**
2248 * create_smb2_pipe() - create IPC pipe
2249 * @work: smb work containing request buffer
2250 *
2251 * Return: 0 on success, otherwise error
2252 */
2253 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2254 {
2255 struct smb2_create_rsp *rsp;
2256 struct smb2_create_req *req;
2257 int id;
2258 int err;
2259 char *name;
2260
2261 WORK_BUFFERS(work, req, rsp);
2262
2263 name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2264 1, work->conn->local_nls);
2265 if (IS_ERR(name)) {
2266 rsp->hdr.Status = STATUS_NO_MEMORY;
2267 err = PTR_ERR(name);
2268 goto out;
2269 }
2270
2271 id = ksmbd_session_rpc_open(work->sess, name);
2272 if (id < 0) {
2273 pr_err("Unable to open RPC pipe: %d\n", id);
2274 err = id;
2275 goto out;
2276 }
2277
2278 rsp->hdr.Status = STATUS_SUCCESS;
2279 rsp->StructureSize = cpu_to_le16(89);
2280 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2281 rsp->Flags = 0;
2282 rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2283
2284 rsp->CreationTime = cpu_to_le64(0);
2285 rsp->LastAccessTime = cpu_to_le64(0);
2286 rsp->ChangeTime = cpu_to_le64(0);
2287 rsp->AllocationSize = cpu_to_le64(0);
2288 rsp->EndofFile = cpu_to_le64(0);
2289 rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2290 rsp->Reserved2 = 0;
2291 rsp->VolatileFileId = id;
2292 rsp->PersistentFileId = 0;
2293 rsp->CreateContextsOffset = 0;
2294 rsp->CreateContextsLength = 0;
2295
2296 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer));
2297 if (err)
2298 goto out;
2299
2300 kfree(name);
2301 return 0;
2302
2303 out:
2304 switch (err) {
2305 case -EINVAL:
2306 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2307 break;
2308 case -ENOSPC:
2309 case -ENOMEM:
2310 rsp->hdr.Status = STATUS_NO_MEMORY;
2311 break;
2312 }
2313
2314 if (!IS_ERR(name))
2315 kfree(name);
2316
2317 smb2_set_err_rsp(work);
2318 return err;
2319 }
2320
2321 /**
2322 * smb2_set_ea() - handler for setting extended attributes using set
2323 * info command
2324 * @eabuf: set info command buffer
2325 * @buf_len: set info command buffer length
2326 * @path: dentry path for get ea
2327 * @get_write: get write access to a mount
2328 *
2329 * Return: 0 on success, otherwise error
2330 */
2331 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2332 const struct path *path, bool get_write)
2333 {
2334 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2335 char *attr_name = NULL, *value;
2336 int rc = 0;
2337 unsigned int next = 0;
2338
2339 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2340 le16_to_cpu(eabuf->EaValueLength))
2341 return -EINVAL;
2342
2343 attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2344 if (!attr_name)
2345 return -ENOMEM;
2346
2347 do {
2348 if (!eabuf->EaNameLength)
2349 goto next;
2350
2351 ksmbd_debug(SMB,
2352 "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2353 eabuf->name, eabuf->EaNameLength,
2354 le16_to_cpu(eabuf->EaValueLength),
2355 le32_to_cpu(eabuf->NextEntryOffset));
2356
2357 if (eabuf->EaNameLength >
2358 (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2359 rc = -EINVAL;
2360 break;
2361 }
2362
2363 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2364 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2365 eabuf->EaNameLength);
2366 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2367 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2368
2369 if (!eabuf->EaValueLength) {
2370 rc = ksmbd_vfs_casexattr_len(idmap,
2371 path->dentry,
2372 attr_name,
2373 XATTR_USER_PREFIX_LEN +
2374 eabuf->EaNameLength);
2375
2376 /* delete the EA only when it exits */
2377 if (rc > 0) {
2378 rc = ksmbd_vfs_remove_xattr(idmap,
2379 path,
2380 attr_name,
2381 get_write);
2382
2383 if (rc < 0) {
2384 ksmbd_debug(SMB,
2385 "remove xattr failed(%d)\n",
2386 rc);
2387 break;
2388 }
2389 }
2390
2391 /* if the EA doesn't exist, just do nothing. */
2392 rc = 0;
2393 } else {
2394 rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value,
2395 le16_to_cpu(eabuf->EaValueLength),
2396 0, get_write);
2397 if (rc < 0) {
2398 ksmbd_debug(SMB,
2399 "ksmbd_vfs_setxattr is failed(%d)\n",
2400 rc);
2401 break;
2402 }
2403 }
2404
2405 next:
2406 next = le32_to_cpu(eabuf->NextEntryOffset);
2407 if (next == 0 || buf_len < next)
2408 break;
2409 buf_len -= next;
2410 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2411 if (buf_len < sizeof(struct smb2_ea_info)) {
2412 rc = -EINVAL;
2413 break;
2414 }
2415
2416 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2417 le16_to_cpu(eabuf->EaValueLength)) {
2418 rc = -EINVAL;
2419 break;
2420 }
2421 } while (next != 0);
2422
2423 kfree(attr_name);
2424 return rc;
2425 }
2426
2427 static noinline int smb2_set_stream_name_xattr(const struct path *path,
2428 struct ksmbd_file *fp,
2429 char *stream_name, int s_type)
2430 {
2431 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2432 size_t xattr_stream_size;
2433 char *xattr_stream_name;
2434 int rc;
2435
2436 rc = ksmbd_vfs_xattr_stream_name(stream_name,
2437 &xattr_stream_name,
2438 &xattr_stream_size,
2439 s_type);
2440 if (rc)
2441 return rc;
2442
2443 fp->stream.name = xattr_stream_name;
2444 fp->stream.size = xattr_stream_size;
2445
2446 /* Check if there is stream prefix in xattr space */
2447 rc = ksmbd_vfs_casexattr_len(idmap,
2448 path->dentry,
2449 xattr_stream_name,
2450 xattr_stream_size);
2451 if (rc >= 0)
2452 return 0;
2453
2454 if (fp->cdoption == FILE_OPEN_LE) {
2455 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2456 return -EBADF;
2457 }
2458
2459 rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false);
2460 if (rc < 0)
2461 pr_err("Failed to store XATTR stream name :%d\n", rc);
2462 return 0;
2463 }
2464
2465 static int smb2_remove_smb_xattrs(const struct path *path)
2466 {
2467 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2468 char *name, *xattr_list = NULL;
2469 ssize_t xattr_list_len;
2470 int err = 0;
2471
2472 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2473 if (xattr_list_len < 0) {
2474 goto out;
2475 } else if (!xattr_list_len) {
2476 ksmbd_debug(SMB, "empty xattr in the file\n");
2477 goto out;
2478 }
2479
2480 for (name = xattr_list; name - xattr_list < xattr_list_len;
2481 name += strlen(name) + 1) {
2482 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2483
2484 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2485 !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
2486 STREAM_PREFIX_LEN)) {
2487 err = ksmbd_vfs_remove_xattr(idmap, path,
2488 name, true);
2489 if (err)
2490 ksmbd_debug(SMB, "remove xattr failed : %s\n",
2491 name);
2492 }
2493 }
2494 out:
2495 kvfree(xattr_list);
2496 return err;
2497 }
2498
2499 static int smb2_create_truncate(const struct path *path)
2500 {
2501 int rc = vfs_truncate(path, 0);
2502
2503 if (rc) {
2504 pr_err("vfs_truncate failed, rc %d\n", rc);
2505 return rc;
2506 }
2507
2508 rc = smb2_remove_smb_xattrs(path);
2509 if (rc == -EOPNOTSUPP)
2510 rc = 0;
2511 if (rc)
2512 ksmbd_debug(SMB,
2513 "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2514 rc);
2515 return rc;
2516 }
2517
2518 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
2519 struct ksmbd_file *fp)
2520 {
2521 struct xattr_dos_attrib da = {0};
2522 int rc;
2523
2524 if (!test_share_config_flag(tcon->share_conf,
2525 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2526 return;
2527
2528 da.version = 4;
2529 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2530 da.itime = da.create_time = fp->create_time;
2531 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2532 XATTR_DOSINFO_ITIME;
2533
2534 rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true);
2535 if (rc)
2536 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2537 }
2538
2539 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2540 const struct path *path, struct ksmbd_file *fp)
2541 {
2542 struct xattr_dos_attrib da;
2543 int rc;
2544
2545 fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2546
2547 /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2548 if (!test_share_config_flag(tcon->share_conf,
2549 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2550 return;
2551
2552 rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt),
2553 path->dentry, &da);
2554 if (rc > 0) {
2555 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2556 fp->create_time = da.create_time;
2557 fp->itime = da.itime;
2558 }
2559 }
2560
2561 static int smb2_creat(struct ksmbd_work *work, struct path *parent_path,
2562 struct path *path, char *name, int open_flags,
2563 umode_t posix_mode, bool is_dir)
2564 {
2565 struct ksmbd_tree_connect *tcon = work->tcon;
2566 struct ksmbd_share_config *share = tcon->share_conf;
2567 umode_t mode;
2568 int rc;
2569
2570 if (!(open_flags & O_CREAT))
2571 return -EBADF;
2572
2573 ksmbd_debug(SMB, "file does not exist, so creating\n");
2574 if (is_dir == true) {
2575 ksmbd_debug(SMB, "creating directory\n");
2576
2577 mode = share_config_directory_mode(share, posix_mode);
2578 rc = ksmbd_vfs_mkdir(work, name, mode);
2579 if (rc)
2580 return rc;
2581 } else {
2582 ksmbd_debug(SMB, "creating regular file\n");
2583
2584 mode = share_config_create_mode(share, posix_mode);
2585 rc = ksmbd_vfs_create(work, name, mode);
2586 if (rc)
2587 return rc;
2588 }
2589
2590 rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0);
2591 if (rc) {
2592 pr_err("cannot get linux path (%s), err = %d\n",
2593 name, rc);
2594 return rc;
2595 }
2596 return 0;
2597 }
2598
2599 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2600 struct smb2_create_req *req,
2601 const struct path *path)
2602 {
2603 struct create_context *context;
2604 struct create_sd_buf_req *sd_buf;
2605
2606 if (!req->CreateContextsOffset)
2607 return -ENOENT;
2608
2609 /* Parse SD BUFFER create contexts */
2610 context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4);
2611 if (!context)
2612 return -ENOENT;
2613 else if (IS_ERR(context))
2614 return PTR_ERR(context);
2615
2616 ksmbd_debug(SMB,
2617 "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2618 sd_buf = (struct create_sd_buf_req *)context;
2619 if (le16_to_cpu(context->DataOffset) +
2620 le32_to_cpu(context->DataLength) <
2621 sizeof(struct create_sd_buf_req))
2622 return -EINVAL;
2623 return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2624 le32_to_cpu(sd_buf->ccontext.DataLength), true, false);
2625 }
2626
2627 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2628 struct mnt_idmap *idmap,
2629 struct inode *inode)
2630 {
2631 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
2632 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
2633
2634 fattr->cf_uid = vfsuid_into_kuid(vfsuid);
2635 fattr->cf_gid = vfsgid_into_kgid(vfsgid);
2636 fattr->cf_mode = inode->i_mode;
2637 fattr->cf_acls = NULL;
2638 fattr->cf_dacls = NULL;
2639
2640 if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2641 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);
2642 if (S_ISDIR(inode->i_mode))
2643 fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);
2644 }
2645 }
2646
2647 enum {
2648 DURABLE_RECONN_V2 = 1,
2649 DURABLE_RECONN,
2650 DURABLE_REQ_V2,
2651 DURABLE_REQ,
2652 };
2653
2654 struct durable_info {
2655 struct ksmbd_file *fp;
2656 unsigned short int type;
2657 bool persistent;
2658 bool reconnected;
2659 unsigned int timeout;
2660 char *CreateGuid;
2661 };
2662
2663 static int parse_durable_handle_context(struct ksmbd_work *work,
2664 struct smb2_create_req *req,
2665 struct lease_ctx_info *lc,
2666 struct durable_info *dh_info)
2667 {
2668 struct ksmbd_conn *conn = work->conn;
2669 struct create_context *context;
2670 int dh_idx, err = 0;
2671 u64 persistent_id = 0;
2672 int req_op_level;
2673 static const char * const durable_arr[] = {"DH2C", "DHnC", "DH2Q", "DHnQ"};
2674
2675 req_op_level = req->RequestedOplockLevel;
2676 for (dh_idx = DURABLE_RECONN_V2; dh_idx <= ARRAY_SIZE(durable_arr);
2677 dh_idx++) {
2678 context = smb2_find_context_vals(req, durable_arr[dh_idx - 1], 4);
2679 if (IS_ERR(context)) {
2680 err = PTR_ERR(context);
2681 goto out;
2682 }
2683 if (!context)
2684 continue;
2685
2686 switch (dh_idx) {
2687 case DURABLE_RECONN_V2:
2688 {
2689 struct create_durable_reconn_v2_req *recon_v2;
2690
2691 if (dh_info->type == DURABLE_RECONN ||
2692 dh_info->type == DURABLE_REQ_V2) {
2693 err = -EINVAL;
2694 goto out;
2695 }
2696
2697 recon_v2 = (struct create_durable_reconn_v2_req *)context;
2698 persistent_id = recon_v2->Fid.PersistentFileId;
2699 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id);
2700 if (!dh_info->fp) {
2701 ksmbd_debug(SMB, "Failed to get durable handle state\n");
2702 err = -EBADF;
2703 goto out;
2704 }
2705
2706 if (memcmp(dh_info->fp->create_guid, recon_v2->CreateGuid,
2707 SMB2_CREATE_GUID_SIZE)) {
2708 err = -EBADF;
2709 ksmbd_put_durable_fd(dh_info->fp);
2710 goto out;
2711 }
2712
2713 dh_info->type = dh_idx;
2714 dh_info->reconnected = true;
2715 ksmbd_debug(SMB,
2716 "reconnect v2 Persistent-id from reconnect = %llu\n",
2717 persistent_id);
2718 break;
2719 }
2720 case DURABLE_RECONN:
2721 {
2722 struct create_durable_reconn_req *recon;
2723
2724 if (dh_info->type == DURABLE_RECONN_V2 ||
2725 dh_info->type == DURABLE_REQ_V2) {
2726 err = -EINVAL;
2727 goto out;
2728 }
2729
2730 recon = (struct create_durable_reconn_req *)context;
2731 persistent_id = recon->Data.Fid.PersistentFileId;
2732 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id);
2733 if (!dh_info->fp) {
2734 ksmbd_debug(SMB, "Failed to get durable handle state\n");
2735 err = -EBADF;
2736 goto out;
2737 }
2738
2739 dh_info->type = dh_idx;
2740 dh_info->reconnected = true;
2741 ksmbd_debug(SMB, "reconnect Persistent-id from reconnect = %llu\n",
2742 persistent_id);
2743 break;
2744 }
2745 case DURABLE_REQ_V2:
2746 {
2747 struct create_durable_req_v2 *durable_v2_blob;
2748
2749 if (dh_info->type == DURABLE_RECONN ||
2750 dh_info->type == DURABLE_RECONN_V2) {
2751 err = -EINVAL;
2752 goto out;
2753 }
2754
2755 durable_v2_blob =
2756 (struct create_durable_req_v2 *)context;
2757 ksmbd_debug(SMB, "Request for durable v2 open\n");
2758 dh_info->fp = ksmbd_lookup_fd_cguid(durable_v2_blob->CreateGuid);
2759 if (dh_info->fp) {
2760 if (!memcmp(conn->ClientGUID, dh_info->fp->client_guid,
2761 SMB2_CLIENT_GUID_SIZE)) {
2762 if (!(req->hdr.Flags & SMB2_FLAGS_REPLAY_OPERATION)) {
2763 err = -ENOEXEC;
2764 goto out;
2765 }
2766
2767 dh_info->fp->conn = conn;
2768 dh_info->reconnected = true;
2769 goto out;
2770 }
2771 }
2772
2773 if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) ||
2774 req_op_level == SMB2_OPLOCK_LEVEL_BATCH) {
2775 dh_info->CreateGuid =
2776 durable_v2_blob->CreateGuid;
2777 dh_info->persistent =
2778 le32_to_cpu(durable_v2_blob->Flags);
2779 dh_info->timeout =
2780 le32_to_cpu(durable_v2_blob->Timeout);
2781 dh_info->type = dh_idx;
2782 }
2783 break;
2784 }
2785 case DURABLE_REQ:
2786 if (dh_info->type == DURABLE_RECONN)
2787 goto out;
2788 if (dh_info->type == DURABLE_RECONN_V2 ||
2789 dh_info->type == DURABLE_REQ_V2) {
2790 err = -EINVAL;
2791 goto out;
2792 }
2793
2794 if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) ||
2795 req_op_level == SMB2_OPLOCK_LEVEL_BATCH) {
2796 ksmbd_debug(SMB, "Request for durable open\n");
2797 dh_info->type = dh_idx;
2798 }
2799 }
2800 }
2801
2802 out:
2803 return err;
2804 }
2805
2806 /**
2807 * smb2_open() - handler for smb file open request
2808 * @work: smb work containing request buffer
2809 *
2810 * Return: 0 on success, otherwise error
2811 */
2812 int smb2_open(struct ksmbd_work *work)
2813 {
2814 struct ksmbd_conn *conn = work->conn;
2815 struct ksmbd_session *sess = work->sess;
2816 struct ksmbd_tree_connect *tcon = work->tcon;
2817 struct smb2_create_req *req;
2818 struct smb2_create_rsp *rsp;
2819 struct path path, parent_path;
2820 struct ksmbd_share_config *share = tcon->share_conf;
2821 struct ksmbd_file *fp = NULL;
2822 struct file *filp = NULL;
2823 struct mnt_idmap *idmap = NULL;
2824 struct kstat stat;
2825 struct create_context *context;
2826 struct lease_ctx_info *lc = NULL;
2827 struct create_ea_buf_req *ea_buf = NULL;
2828 struct oplock_info *opinfo;
2829 struct durable_info dh_info = {0};
2830 __le32 *next_ptr = NULL;
2831 int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2832 int rc = 0;
2833 int contxt_cnt = 0, query_disk_id = 0;
2834 int maximal_access_ctxt = 0, posix_ctxt = 0;
2835 int s_type = 0;
2836 int next_off = 0;
2837 char *name = NULL;
2838 char *stream_name = NULL;
2839 bool file_present = false, created = false, already_permitted = false;
2840 int share_ret, need_truncate = 0;
2841 u64 time;
2842 umode_t posix_mode = 0;
2843 __le32 daccess, maximal_access = 0;
2844 int iov_len = 0;
2845
2846 WORK_BUFFERS(work, req, rsp);
2847
2848 if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2849 (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2850 ksmbd_debug(SMB, "invalid flag in chained command\n");
2851 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2852 smb2_set_err_rsp(work);
2853 return -EINVAL;
2854 }
2855
2856 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2857 ksmbd_debug(SMB, "IPC pipe create request\n");
2858 return create_smb2_pipe(work);
2859 }
2860
2861 if (req->NameLength) {
2862 name = smb2_get_name((char *)req + le16_to_cpu(req->NameOffset),
2863 le16_to_cpu(req->NameLength),
2864 work->conn->local_nls);
2865 if (IS_ERR(name)) {
2866 rc = PTR_ERR(name);
2867 name = NULL;
2868 goto err_out2;
2869 }
2870
2871 ksmbd_debug(SMB, "converted name = %s\n", name);
2872 if (strchr(name, ':')) {
2873 if (!test_share_config_flag(work->tcon->share_conf,
2874 KSMBD_SHARE_FLAG_STREAMS)) {
2875 rc = -EBADF;
2876 goto err_out2;
2877 }
2878 rc = parse_stream_name(name, &stream_name, &s_type);
2879 if (rc < 0)
2880 goto err_out2;
2881 }
2882
2883 rc = ksmbd_validate_filename(name);
2884 if (rc < 0)
2885 goto err_out2;
2886
2887 if (ksmbd_share_veto_filename(share, name)) {
2888 rc = -ENOENT;
2889 ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2890 name);
2891 goto err_out2;
2892 }
2893 } else {
2894 name = kstrdup("", GFP_KERNEL);
2895 if (!name) {
2896 rc = -ENOMEM;
2897 goto err_out2;
2898 }
2899 }
2900
2901 req_op_level = req->RequestedOplockLevel;
2902
2903 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE &&
2904 req->CreateContextsOffset) {
2905 lc = parse_lease_state(req);
2906 rc = parse_durable_handle_context(work, req, lc, &dh_info);
2907 if (rc) {
2908 ksmbd_debug(SMB, "error parsing durable handle context\n");
2909 goto err_out2;
2910 }
2911
2912 if (dh_info.reconnected == true) {
2913 rc = smb2_check_durable_oplock(conn, share, dh_info.fp, lc, name);
2914 if (rc) {
2915 ksmbd_put_durable_fd(dh_info.fp);
2916 goto err_out2;
2917 }
2918
2919 rc = ksmbd_reopen_durable_fd(work, dh_info.fp);
2920 if (rc) {
2921 ksmbd_put_durable_fd(dh_info.fp);
2922 goto err_out2;
2923 }
2924
2925 if (ksmbd_override_fsids(work)) {
2926 rc = -ENOMEM;
2927 ksmbd_put_durable_fd(dh_info.fp);
2928 goto err_out2;
2929 }
2930
2931 fp = dh_info.fp;
2932 file_info = FILE_OPENED;
2933
2934 rc = ksmbd_vfs_getattr(&fp->filp->f_path, &stat);
2935 if (rc)
2936 goto err_out2;
2937
2938 ksmbd_put_durable_fd(fp);
2939 goto reconnected_fp;
2940 }
2941 } else if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
2942 lc = parse_lease_state(req);
2943
2944 if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
2945 pr_err("Invalid impersonationlevel : 0x%x\n",
2946 le32_to_cpu(req->ImpersonationLevel));
2947 rc = -EIO;
2948 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2949 goto err_out2;
2950 }
2951
2952 if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
2953 pr_err("Invalid create options : 0x%x\n",
2954 le32_to_cpu(req->CreateOptions));
2955 rc = -EINVAL;
2956 goto err_out2;
2957 } else {
2958 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2959 req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2960 req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2961
2962 if (req->CreateOptions &
2963 (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2964 FILE_RESERVE_OPFILTER_LE)) {
2965 rc = -EOPNOTSUPP;
2966 goto err_out2;
2967 }
2968
2969 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2970 if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2971 rc = -EINVAL;
2972 goto err_out2;
2973 } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2974 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2975 }
2976 }
2977 }
2978
2979 if (le32_to_cpu(req->CreateDisposition) >
2980 le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2981 pr_err("Invalid create disposition : 0x%x\n",
2982 le32_to_cpu(req->CreateDisposition));
2983 rc = -EINVAL;
2984 goto err_out2;
2985 }
2986
2987 if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2988 pr_err("Invalid desired access : 0x%x\n",
2989 le32_to_cpu(req->DesiredAccess));
2990 rc = -EACCES;
2991 goto err_out2;
2992 }
2993
2994 if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
2995 pr_err("Invalid file attribute : 0x%x\n",
2996 le32_to_cpu(req->FileAttributes));
2997 rc = -EINVAL;
2998 goto err_out2;
2999 }
3000
3001 if (req->CreateContextsOffset) {
3002 /* Parse non-durable handle create contexts */
3003 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4);
3004 if (IS_ERR(context)) {
3005 rc = PTR_ERR(context);
3006 goto err_out2;
3007 } else if (context) {
3008 ea_buf = (struct create_ea_buf_req *)context;
3009 if (le16_to_cpu(context->DataOffset) +
3010 le32_to_cpu(context->DataLength) <
3011 sizeof(struct create_ea_buf_req)) {
3012 rc = -EINVAL;
3013 goto err_out2;
3014 }
3015 if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
3016 rsp->hdr.Status = STATUS_ACCESS_DENIED;
3017 rc = -EACCES;
3018 goto err_out2;
3019 }
3020 }
3021
3022 context = smb2_find_context_vals(req,
3023 SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4);
3024 if (IS_ERR(context)) {
3025 rc = PTR_ERR(context);
3026 goto err_out2;
3027 } else if (context) {
3028 ksmbd_debug(SMB,
3029 "get query maximal access context\n");
3030 maximal_access_ctxt = 1;
3031 }
3032
3033 context = smb2_find_context_vals(req,
3034 SMB2_CREATE_TIMEWARP_REQUEST, 4);
3035 if (IS_ERR(context)) {
3036 rc = PTR_ERR(context);
3037 goto err_out2;
3038 } else if (context) {
3039 ksmbd_debug(SMB, "get timewarp context\n");
3040 rc = -EBADF;
3041 goto err_out2;
3042 }
3043
3044 if (tcon->posix_extensions) {
3045 context = smb2_find_context_vals(req,
3046 SMB2_CREATE_TAG_POSIX, 16);
3047 if (IS_ERR(context)) {
3048 rc = PTR_ERR(context);
3049 goto err_out2;
3050 } else if (context) {
3051 struct create_posix *posix =
3052 (struct create_posix *)context;
3053 if (le16_to_cpu(context->DataOffset) +
3054 le32_to_cpu(context->DataLength) <
3055 sizeof(struct create_posix) - 4) {
3056 rc = -EINVAL;
3057 goto err_out2;
3058 }
3059 ksmbd_debug(SMB, "get posix context\n");
3060
3061 posix_mode = le32_to_cpu(posix->Mode);
3062 posix_ctxt = 1;
3063 }
3064 }
3065 }
3066
3067 if (ksmbd_override_fsids(work)) {
3068 rc = -ENOMEM;
3069 goto err_out2;
3070 }
3071
3072 rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS,
3073 &parent_path, &path, 1);
3074 if (!rc) {
3075 file_present = true;
3076
3077 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
3078 /*
3079 * If file exists with under flags, return access
3080 * denied error.
3081 */
3082 if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
3083 req->CreateDisposition == FILE_OPEN_IF_LE) {
3084 rc = -EACCES;
3085 goto err_out;
3086 }
3087
3088 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
3089 ksmbd_debug(SMB,
3090 "User does not have write permission\n");
3091 rc = -EACCES;
3092 goto err_out;
3093 }
3094 } else if (d_is_symlink(path.dentry)) {
3095 rc = -EACCES;
3096 goto err_out;
3097 }
3098
3099 idmap = mnt_idmap(path.mnt);
3100 } else {
3101 if (rc != -ENOENT)
3102 goto err_out;
3103 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
3104 name, rc);
3105 rc = 0;
3106 }
3107
3108 if (stream_name) {
3109 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
3110 if (s_type == DATA_STREAM) {
3111 rc = -EIO;
3112 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3113 }
3114 } else {
3115 if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
3116 s_type == DATA_STREAM) {
3117 rc = -EIO;
3118 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
3119 }
3120 }
3121
3122 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
3123 req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
3124 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3125 rc = -EIO;
3126 }
3127
3128 if (rc < 0)
3129 goto err_out;
3130 }
3131
3132 if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
3133 S_ISDIR(d_inode(path.dentry)->i_mode) &&
3134 !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3135 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
3136 name, req->CreateOptions);
3137 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
3138 rc = -EIO;
3139 goto err_out;
3140 }
3141
3142 if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
3143 !(req->CreateDisposition == FILE_CREATE_LE) &&
3144 !S_ISDIR(d_inode(path.dentry)->i_mode)) {
3145 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3146 rc = -EIO;
3147 goto err_out;
3148 }
3149
3150 if (!stream_name && file_present &&
3151 req->CreateDisposition == FILE_CREATE_LE) {
3152 rc = -EEXIST;
3153 goto err_out;
3154 }
3155
3156 daccess = smb_map_generic_desired_access(req->DesiredAccess);
3157
3158 if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3159 rc = smb_check_perm_dacl(conn, &path, &daccess,
3160 sess->user->uid);
3161 if (rc)
3162 goto err_out;
3163 }
3164
3165 if (daccess & FILE_MAXIMAL_ACCESS_LE) {
3166 if (!file_present) {
3167 daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
3168 } else {
3169 ksmbd_vfs_query_maximal_access(idmap,
3170 path.dentry,
3171 &daccess);
3172 already_permitted = true;
3173 }
3174 maximal_access = daccess;
3175 }
3176
3177 open_flags = smb2_create_open_flags(file_present, daccess,
3178 req->CreateDisposition,
3179 &may_flags,
3180 req->CreateOptions,
3181 file_present ? d_inode(path.dentry)->i_mode : 0);
3182
3183 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
3184 if (open_flags & (O_CREAT | O_TRUNC)) {
3185 ksmbd_debug(SMB,
3186 "User does not have write permission\n");
3187 rc = -EACCES;
3188 goto err_out;
3189 }
3190 }
3191
3192 /*create file if not present */
3193 if (!file_present) {
3194 rc = smb2_creat(work, &parent_path, &path, name, open_flags,
3195 posix_mode,
3196 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
3197 if (rc) {
3198 if (rc == -ENOENT) {
3199 rc = -EIO;
3200 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
3201 }
3202 goto err_out;
3203 }
3204
3205 created = true;
3206 idmap = mnt_idmap(path.mnt);
3207 if (ea_buf) {
3208 if (le32_to_cpu(ea_buf->ccontext.DataLength) <
3209 sizeof(struct smb2_ea_info)) {
3210 rc = -EINVAL;
3211 goto err_out;
3212 }
3213
3214 rc = smb2_set_ea(&ea_buf->ea,
3215 le32_to_cpu(ea_buf->ccontext.DataLength),
3216 &path, false);
3217 if (rc == -EOPNOTSUPP)
3218 rc = 0;
3219 else if (rc)
3220 goto err_out;
3221 }
3222 } else if (!already_permitted) {
3223 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
3224 * because execute(search) permission on a parent directory,
3225 * is already granted.
3226 */
3227 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
3228 rc = inode_permission(idmap,
3229 d_inode(path.dentry),
3230 may_flags);
3231 if (rc)
3232 goto err_out;
3233
3234 if ((daccess & FILE_DELETE_LE) ||
3235 (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3236 rc = inode_permission(idmap,
3237 d_inode(path.dentry->d_parent),
3238 MAY_EXEC | MAY_WRITE);
3239 if (rc)
3240 goto err_out;
3241 }
3242 }
3243 }
3244
3245 rc = ksmbd_query_inode_status(path.dentry->d_parent);
3246 if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
3247 rc = -EBUSY;
3248 goto err_out;
3249 }
3250
3251 rc = 0;
3252 filp = dentry_open(&path, open_flags, current_cred());
3253 if (IS_ERR(filp)) {
3254 rc = PTR_ERR(filp);
3255 pr_err("dentry open for dir failed, rc %d\n", rc);
3256 goto err_out;
3257 }
3258
3259 if (file_present) {
3260 if (!(open_flags & O_TRUNC))
3261 file_info = FILE_OPENED;
3262 else
3263 file_info = FILE_OVERWRITTEN;
3264
3265 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
3266 FILE_SUPERSEDE_LE)
3267 file_info = FILE_SUPERSEDED;
3268 } else if (open_flags & O_CREAT) {
3269 file_info = FILE_CREATED;
3270 }
3271
3272 ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
3273
3274 /* Obtain Volatile-ID */
3275 fp = ksmbd_open_fd(work, filp);
3276 if (IS_ERR(fp)) {
3277 fput(filp);
3278 rc = PTR_ERR(fp);
3279 fp = NULL;
3280 goto err_out;
3281 }
3282
3283 /* Get Persistent-ID */
3284 ksmbd_open_durable_fd(fp);
3285 if (!has_file_id(fp->persistent_id)) {
3286 rc = -ENOMEM;
3287 goto err_out;
3288 }
3289
3290 fp->cdoption = req->CreateDisposition;
3291 fp->daccess = daccess;
3292 fp->saccess = req->ShareAccess;
3293 fp->coption = req->CreateOptions;
3294
3295 /* Set default windows and posix acls if creating new file */
3296 if (created) {
3297 int posix_acl_rc;
3298 struct inode *inode = d_inode(path.dentry);
3299
3300 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap,
3301 &path,
3302 d_inode(path.dentry->d_parent));
3303 if (posix_acl_rc)
3304 ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
3305
3306 if (test_share_config_flag(work->tcon->share_conf,
3307 KSMBD_SHARE_FLAG_ACL_XATTR)) {
3308 rc = smb_inherit_dacl(conn, &path, sess->user->uid,
3309 sess->user->gid);
3310 }
3311
3312 if (rc) {
3313 rc = smb2_create_sd_buffer(work, req, &path);
3314 if (rc) {
3315 if (posix_acl_rc)
3316 ksmbd_vfs_set_init_posix_acl(idmap,
3317 &path);
3318
3319 if (test_share_config_flag(work->tcon->share_conf,
3320 KSMBD_SHARE_FLAG_ACL_XATTR)) {
3321 struct smb_fattr fattr;
3322 struct smb_ntsd *pntsd;
3323 int pntsd_size, ace_num = 0;
3324
3325 ksmbd_acls_fattr(&fattr, idmap, inode);
3326 if (fattr.cf_acls)
3327 ace_num = fattr.cf_acls->a_count;
3328 if (fattr.cf_dacls)
3329 ace_num += fattr.cf_dacls->a_count;
3330
3331 pntsd = kmalloc(sizeof(struct smb_ntsd) +
3332 sizeof(struct smb_sid) * 3 +
3333 sizeof(struct smb_acl) +
3334 sizeof(struct smb_ace) * ace_num * 2,
3335 GFP_KERNEL);
3336 if (!pntsd) {
3337 posix_acl_release(fattr.cf_acls);
3338 posix_acl_release(fattr.cf_dacls);
3339 goto err_out;
3340 }
3341
3342 rc = build_sec_desc(idmap,
3343 pntsd, NULL, 0,
3344 OWNER_SECINFO |
3345 GROUP_SECINFO |
3346 DACL_SECINFO,
3347 &pntsd_size, &fattr);
3348 posix_acl_release(fattr.cf_acls);
3349 posix_acl_release(fattr.cf_dacls);
3350 if (rc) {
3351 kfree(pntsd);
3352 goto err_out;
3353 }
3354
3355 rc = ksmbd_vfs_set_sd_xattr(conn,
3356 idmap,
3357 &path,
3358 pntsd,
3359 pntsd_size,
3360 false);
3361 kfree(pntsd);
3362 if (rc)
3363 pr_err("failed to store ntacl in xattr : %d\n",
3364 rc);
3365 }
3366 }
3367 }
3368 rc = 0;
3369 }
3370
3371 if (stream_name) {
3372 rc = smb2_set_stream_name_xattr(&path,
3373 fp,
3374 stream_name,
3375 s_type);
3376 if (rc)
3377 goto err_out;
3378 file_info = FILE_CREATED;
3379 }
3380
3381 fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3382 FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3383
3384 /* fp should be searchable through ksmbd_inode.m_fp_list
3385 * after daccess, saccess, attrib_only, and stream are
3386 * initialized.
3387 */
3388 down_write(&fp->f_ci->m_lock);
3389 list_add(&fp->node, &fp->f_ci->m_fp_list);
3390 up_write(&fp->f_ci->m_lock);
3391
3392 /* Check delete pending among previous fp before oplock break */
3393 if (ksmbd_inode_pending_delete(fp)) {
3394 rc = -EBUSY;
3395 goto err_out;
3396 }
3397
3398 if (file_present || created)
3399 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3400
3401 if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3402 !fp->attrib_only && !stream_name) {
3403 smb_break_all_oplock(work, fp);
3404 need_truncate = 1;
3405 }
3406
3407 share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3408 if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3409 (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3410 !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3411 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3412 rc = share_ret;
3413 goto err_out1;
3414 }
3415 } else {
3416 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && lc) {
3417 if (S_ISDIR(file_inode(filp)->i_mode)) {
3418 lc->req_state &= ~SMB2_LEASE_WRITE_CACHING_LE;
3419 lc->is_dir = true;
3420 }
3421
3422 /*
3423 * Compare parent lease using parent key. If there is no
3424 * a lease that has same parent key, Send lease break
3425 * notification.
3426 */
3427 smb_send_parent_lease_break_noti(fp, lc);
3428
3429 req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3430 ksmbd_debug(SMB,
3431 "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3432 name, req_op_level, lc->req_state);
3433 rc = find_same_lease_key(sess, fp->f_ci, lc);
3434 if (rc)
3435 goto err_out1;
3436 } else if (open_flags == O_RDONLY &&
3437 (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3438 req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3439 req_op_level = SMB2_OPLOCK_LEVEL_II;
3440
3441 rc = smb_grant_oplock(work, req_op_level,
3442 fp->persistent_id, fp,
3443 le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3444 lc, share_ret);
3445 if (rc < 0)
3446 goto err_out1;
3447 }
3448
3449 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3450 ksmbd_fd_set_delete_on_close(fp, file_info);
3451
3452 if (need_truncate) {
3453 rc = smb2_create_truncate(&fp->filp->f_path);
3454 if (rc)
3455 goto err_out1;
3456 }
3457
3458 if (req->CreateContextsOffset) {
3459 struct create_alloc_size_req *az_req;
3460
3461 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3462 SMB2_CREATE_ALLOCATION_SIZE, 4);
3463 if (IS_ERR(az_req)) {
3464 rc = PTR_ERR(az_req);
3465 goto err_out1;
3466 } else if (az_req) {
3467 loff_t alloc_size;
3468 int err;
3469
3470 if (le16_to_cpu(az_req->ccontext.DataOffset) +
3471 le32_to_cpu(az_req->ccontext.DataLength) <
3472 sizeof(struct create_alloc_size_req)) {
3473 rc = -EINVAL;
3474 goto err_out1;
3475 }
3476 alloc_size = le64_to_cpu(az_req->AllocationSize);
3477 ksmbd_debug(SMB,
3478 "request smb2 create allocate size : %llu\n",
3479 alloc_size);
3480 smb_break_all_levII_oplock(work, fp, 1);
3481 err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3482 alloc_size);
3483 if (err < 0)
3484 ksmbd_debug(SMB,
3485 "vfs_fallocate is failed : %d\n",
3486 err);
3487 }
3488
3489 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4);
3490 if (IS_ERR(context)) {
3491 rc = PTR_ERR(context);
3492 goto err_out1;
3493 } else if (context) {
3494 ksmbd_debug(SMB, "get query on disk id context\n");
3495 query_disk_id = 1;
3496 }
3497 }
3498
3499 rc = ksmbd_vfs_getattr(&path, &stat);
3500 if (rc)
3501 goto err_out1;
3502
3503 if (stat.result_mask & STATX_BTIME)
3504 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3505 else
3506 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3507 if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3508 fp->f_ci->m_fattr =
3509 cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3510
3511 if (!created)
3512 smb2_update_xattrs(tcon, &path, fp);
3513 else
3514 smb2_new_xattrs(tcon, &path, fp);
3515
3516 memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3517
3518 if (dh_info.type == DURABLE_REQ_V2 || dh_info.type == DURABLE_REQ) {
3519 if (dh_info.type == DURABLE_REQ_V2 && dh_info.persistent &&
3520 test_share_config_flag(work->tcon->share_conf,
3521 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))
3522 fp->is_persistent = true;
3523 else
3524 fp->is_durable = true;
3525
3526 if (dh_info.type == DURABLE_REQ_V2) {
3527 memcpy(fp->create_guid, dh_info.CreateGuid,
3528 SMB2_CREATE_GUID_SIZE);
3529 if (dh_info.timeout)
3530 fp->durable_timeout =
3531 min_t(unsigned int, dh_info.timeout,
3532 DURABLE_HANDLE_MAX_TIMEOUT);
3533 else
3534 fp->durable_timeout = 60;
3535 }
3536 }
3537
3538 reconnected_fp:
3539 rsp->StructureSize = cpu_to_le16(89);
3540 rcu_read_lock();
3541 opinfo = rcu_dereference(fp->f_opinfo);
3542 rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3543 rcu_read_unlock();
3544 rsp->Flags = 0;
3545 rsp->CreateAction = cpu_to_le32(file_info);
3546 rsp->CreationTime = cpu_to_le64(fp->create_time);
3547 time = ksmbd_UnixTimeToNT(stat.atime);
3548 rsp->LastAccessTime = cpu_to_le64(time);
3549 time = ksmbd_UnixTimeToNT(stat.mtime);
3550 rsp->LastWriteTime = cpu_to_le64(time);
3551 time = ksmbd_UnixTimeToNT(stat.ctime);
3552 rsp->ChangeTime = cpu_to_le64(time);
3553 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3554 cpu_to_le64(stat.blocks << 9);
3555 rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3556 rsp->FileAttributes = fp->f_ci->m_fattr;
3557
3558 rsp->Reserved2 = 0;
3559
3560 rsp->PersistentFileId = fp->persistent_id;
3561 rsp->VolatileFileId = fp->volatile_id;
3562
3563 rsp->CreateContextsOffset = 0;
3564 rsp->CreateContextsLength = 0;
3565 iov_len = offsetof(struct smb2_create_rsp, Buffer);
3566
3567 /* If lease is request send lease context response */
3568 if (opinfo && opinfo->is_lease) {
3569 struct create_context *lease_ccontext;
3570
3571 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3572 name, opinfo->o_lease->state);
3573 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3574
3575 lease_ccontext = (struct create_context *)rsp->Buffer;
3576 contxt_cnt++;
3577 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3578 le32_add_cpu(&rsp->CreateContextsLength,
3579 conn->vals->create_lease_size);
3580 iov_len += conn->vals->create_lease_size;
3581 next_ptr = &lease_ccontext->Next;
3582 next_off = conn->vals->create_lease_size;
3583 }
3584
3585 if (maximal_access_ctxt) {
3586 struct create_context *mxac_ccontext;
3587
3588 if (maximal_access == 0)
3589 ksmbd_vfs_query_maximal_access(idmap,
3590 path.dentry,
3591 &maximal_access);
3592 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3593 le32_to_cpu(rsp->CreateContextsLength));
3594 contxt_cnt++;
3595 create_mxac_rsp_buf(rsp->Buffer +
3596 le32_to_cpu(rsp->CreateContextsLength),
3597 le32_to_cpu(maximal_access));
3598 le32_add_cpu(&rsp->CreateContextsLength,
3599 conn->vals->create_mxac_size);
3600 iov_len += conn->vals->create_mxac_size;
3601 if (next_ptr)
3602 *next_ptr = cpu_to_le32(next_off);
3603 next_ptr = &mxac_ccontext->Next;
3604 next_off = conn->vals->create_mxac_size;
3605 }
3606
3607 if (query_disk_id) {
3608 struct create_context *disk_id_ccontext;
3609
3610 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3611 le32_to_cpu(rsp->CreateContextsLength));
3612 contxt_cnt++;
3613 create_disk_id_rsp_buf(rsp->Buffer +
3614 le32_to_cpu(rsp->CreateContextsLength),
3615 stat.ino, tcon->id);
3616 le32_add_cpu(&rsp->CreateContextsLength,
3617 conn->vals->create_disk_id_size);
3618 iov_len += conn->vals->create_disk_id_size;
3619 if (next_ptr)
3620 *next_ptr = cpu_to_le32(next_off);
3621 next_ptr = &disk_id_ccontext->Next;
3622 next_off = conn->vals->create_disk_id_size;
3623 }
3624
3625 if (dh_info.type == DURABLE_REQ || dh_info.type == DURABLE_REQ_V2) {
3626 struct create_context *durable_ccontext;
3627
3628 durable_ccontext = (struct create_context *)(rsp->Buffer +
3629 le32_to_cpu(rsp->CreateContextsLength));
3630 contxt_cnt++;
3631 if (dh_info.type == DURABLE_REQ) {
3632 create_durable_rsp_buf(rsp->Buffer +
3633 le32_to_cpu(rsp->CreateContextsLength));
3634 le32_add_cpu(&rsp->CreateContextsLength,
3635 conn->vals->create_durable_size);
3636 iov_len += conn->vals->create_durable_size;
3637 } else {
3638 create_durable_v2_rsp_buf(rsp->Buffer +
3639 le32_to_cpu(rsp->CreateContextsLength),
3640 fp);
3641 le32_add_cpu(&rsp->CreateContextsLength,
3642 conn->vals->create_durable_v2_size);
3643 iov_len += conn->vals->create_durable_v2_size;
3644 }
3645
3646 if (next_ptr)
3647 *next_ptr = cpu_to_le32(next_off);
3648 next_ptr = &durable_ccontext->Next;
3649 next_off = conn->vals->create_durable_size;
3650 }
3651
3652 if (posix_ctxt) {
3653 contxt_cnt++;
3654 create_posix_rsp_buf(rsp->Buffer +
3655 le32_to_cpu(rsp->CreateContextsLength),
3656 fp);
3657 le32_add_cpu(&rsp->CreateContextsLength,
3658 conn->vals->create_posix_size);
3659 iov_len += conn->vals->create_posix_size;
3660 if (next_ptr)
3661 *next_ptr = cpu_to_le32(next_off);
3662 }
3663
3664 if (contxt_cnt > 0) {
3665 rsp->CreateContextsOffset =
3666 cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3667 }
3668
3669 err_out:
3670 if (rc && (file_present || created))
3671 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3672
3673 err_out1:
3674 ksmbd_revert_fsids(work);
3675
3676 err_out2:
3677 if (!rc) {
3678 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED);
3679 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len);
3680 }
3681 if (rc) {
3682 if (rc == -EINVAL)
3683 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3684 else if (rc == -EOPNOTSUPP)
3685 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3686 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3687 rsp->hdr.Status = STATUS_ACCESS_DENIED;
3688 else if (rc == -ENOENT)
3689 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3690 else if (rc == -EPERM)
3691 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3692 else if (rc == -EBUSY)
3693 rsp->hdr.Status = STATUS_DELETE_PENDING;
3694 else if (rc == -EBADF)
3695 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3696 else if (rc == -ENOEXEC)
3697 rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3698 else if (rc == -ENXIO)
3699 rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3700 else if (rc == -EEXIST)
3701 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3702 else if (rc == -EMFILE)
3703 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3704 if (!rsp->hdr.Status)
3705 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3706
3707 if (fp)
3708 ksmbd_fd_put(work, fp);
3709 smb2_set_err_rsp(work);
3710 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3711 }
3712
3713 kfree(name);
3714 kfree(lc);
3715
3716 return rc;
3717 }
3718
3719 static int readdir_info_level_struct_sz(int info_level)
3720 {
3721 switch (info_level) {
3722 case FILE_FULL_DIRECTORY_INFORMATION:
3723 return sizeof(struct file_full_directory_info);
3724 case FILE_BOTH_DIRECTORY_INFORMATION:
3725 return sizeof(struct file_both_directory_info);
3726 case FILE_DIRECTORY_INFORMATION:
3727 return sizeof(struct file_directory_info);
3728 case FILE_NAMES_INFORMATION:
3729 return sizeof(struct file_names_info);
3730 case FILEID_FULL_DIRECTORY_INFORMATION:
3731 return sizeof(struct file_id_full_dir_info);
3732 case FILEID_BOTH_DIRECTORY_INFORMATION:
3733 return sizeof(struct file_id_both_directory_info);
3734 case SMB_FIND_FILE_POSIX_INFO:
3735 return sizeof(struct smb2_posix_info);
3736 default:
3737 return -EOPNOTSUPP;
3738 }
3739 }
3740
3741 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3742 {
3743 switch (info_level) {
3744 case FILE_FULL_DIRECTORY_INFORMATION:
3745 {
3746 struct file_full_directory_info *ffdinfo;
3747
3748 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3749 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3750 d_info->name = ffdinfo->FileName;
3751 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3752 return 0;
3753 }
3754 case FILE_BOTH_DIRECTORY_INFORMATION:
3755 {
3756 struct file_both_directory_info *fbdinfo;
3757
3758 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3759 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3760 d_info->name = fbdinfo->FileName;
3761 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3762 return 0;
3763 }
3764 case FILE_DIRECTORY_INFORMATION:
3765 {
3766 struct file_directory_info *fdinfo;
3767
3768 fdinfo = (struct file_directory_info *)d_info->rptr;
3769 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3770 d_info->name = fdinfo->FileName;
3771 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3772 return 0;
3773 }
3774 case FILE_NAMES_INFORMATION:
3775 {
3776 struct file_names_info *fninfo;
3777
3778 fninfo = (struct file_names_info *)d_info->rptr;
3779 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3780 d_info->name = fninfo->FileName;
3781 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3782 return 0;
3783 }
3784 case FILEID_FULL_DIRECTORY_INFORMATION:
3785 {
3786 struct file_id_full_dir_info *dinfo;
3787
3788 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3789 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3790 d_info->name = dinfo->FileName;
3791 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3792 return 0;
3793 }
3794 case FILEID_BOTH_DIRECTORY_INFORMATION:
3795 {
3796 struct file_id_both_directory_info *fibdinfo;
3797
3798 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3799 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3800 d_info->name = fibdinfo->FileName;
3801 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3802 return 0;
3803 }
3804 case SMB_FIND_FILE_POSIX_INFO:
3805 {
3806 struct smb2_posix_info *posix_info;
3807
3808 posix_info = (struct smb2_posix_info *)d_info->rptr;
3809 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3810 d_info->name = posix_info->name;
3811 d_info->name_len = le32_to_cpu(posix_info->name_len);
3812 return 0;
3813 }
3814 default:
3815 return -EINVAL;
3816 }
3817 }
3818
3819 /**
3820 * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3821 * buffer
3822 * @conn: connection instance
3823 * @info_level: smb information level
3824 * @d_info: structure included variables for query dir
3825 * @ksmbd_kstat: ksmbd wrapper of dirent stat information
3826 *
3827 * if directory has many entries, find first can't read it fully.
3828 * find next might be called multiple times to read remaining dir entries
3829 *
3830 * Return: 0 on success, otherwise error
3831 */
3832 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3833 struct ksmbd_dir_info *d_info,
3834 struct ksmbd_kstat *ksmbd_kstat)
3835 {
3836 int next_entry_offset = 0;
3837 char *conv_name;
3838 int conv_len;
3839 void *kstat;
3840 int struct_sz, rc = 0;
3841
3842 conv_name = ksmbd_convert_dir_info_name(d_info,
3843 conn->local_nls,
3844 &conv_len);
3845 if (!conv_name)
3846 return -ENOMEM;
3847
3848 /* Somehow the name has only terminating NULL bytes */
3849 if (conv_len < 0) {
3850 rc = -EINVAL;
3851 goto free_conv_name;
3852 }
3853
3854 struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;
3855 next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3856 d_info->last_entry_off_align = next_entry_offset - struct_sz;
3857
3858 if (next_entry_offset > d_info->out_buf_len) {
3859 d_info->out_buf_len = 0;
3860 rc = -ENOSPC;
3861 goto free_conv_name;
3862 }
3863
3864 kstat = d_info->wptr;
3865 if (info_level != FILE_NAMES_INFORMATION)
3866 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3867
3868 switch (info_level) {
3869 case FILE_FULL_DIRECTORY_INFORMATION:
3870 {
3871 struct file_full_directory_info *ffdinfo;
3872
3873 ffdinfo = (struct file_full_directory_info *)kstat;
3874 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3875 ffdinfo->EaSize =
3876 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3877 if (ffdinfo->EaSize)
3878 ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3879 if (d_info->hide_dot_file && d_info->name[0] == '.')
3880 ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3881 memcpy(ffdinfo->FileName, conv_name, conv_len);
3882 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3883 break;
3884 }
3885 case FILE_BOTH_DIRECTORY_INFORMATION:
3886 {
3887 struct file_both_directory_info *fbdinfo;
3888
3889 fbdinfo = (struct file_both_directory_info *)kstat;
3890 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3891 fbdinfo->EaSize =
3892 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3893 if (fbdinfo->EaSize)
3894 fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3895 fbdinfo->ShortNameLength = 0;
3896 fbdinfo->Reserved = 0;
3897 if (d_info->hide_dot_file && d_info->name[0] == '.')
3898 fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3899 memcpy(fbdinfo->FileName, conv_name, conv_len);
3900 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3901 break;
3902 }
3903 case FILE_DIRECTORY_INFORMATION:
3904 {
3905 struct file_directory_info *fdinfo;
3906
3907 fdinfo = (struct file_directory_info *)kstat;
3908 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3909 if (d_info->hide_dot_file && d_info->name[0] == '.')
3910 fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3911 memcpy(fdinfo->FileName, conv_name, conv_len);
3912 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3913 break;
3914 }
3915 case FILE_NAMES_INFORMATION:
3916 {
3917 struct file_names_info *fninfo;
3918
3919 fninfo = (struct file_names_info *)kstat;
3920 fninfo->FileNameLength = cpu_to_le32(conv_len);
3921 memcpy(fninfo->FileName, conv_name, conv_len);
3922 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3923 break;
3924 }
3925 case FILEID_FULL_DIRECTORY_INFORMATION:
3926 {
3927 struct file_id_full_dir_info *dinfo;
3928
3929 dinfo = (struct file_id_full_dir_info *)kstat;
3930 dinfo->FileNameLength = cpu_to_le32(conv_len);
3931 dinfo->EaSize =
3932 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3933 if (dinfo->EaSize)
3934 dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3935 dinfo->Reserved = 0;
3936 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3937 if (d_info->hide_dot_file && d_info->name[0] == '.')
3938 dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3939 memcpy(dinfo->FileName, conv_name, conv_len);
3940 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3941 break;
3942 }
3943 case FILEID_BOTH_DIRECTORY_INFORMATION:
3944 {
3945 struct file_id_both_directory_info *fibdinfo;
3946
3947 fibdinfo = (struct file_id_both_directory_info *)kstat;
3948 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3949 fibdinfo->EaSize =
3950 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3951 if (fibdinfo->EaSize)
3952 fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3953 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3954 fibdinfo->ShortNameLength = 0;
3955 fibdinfo->Reserved = 0;
3956 fibdinfo->Reserved2 = cpu_to_le16(0);
3957 if (d_info->hide_dot_file && d_info->name[0] == '.')
3958 fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3959 memcpy(fibdinfo->FileName, conv_name, conv_len);
3960 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3961 break;
3962 }
3963 case SMB_FIND_FILE_POSIX_INFO:
3964 {
3965 struct smb2_posix_info *posix_info;
3966 u64 time;
3967
3968 posix_info = (struct smb2_posix_info *)kstat;
3969 posix_info->Ignored = 0;
3970 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3971 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3972 posix_info->ChangeTime = cpu_to_le64(time);
3973 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3974 posix_info->LastAccessTime = cpu_to_le64(time);
3975 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3976 posix_info->LastWriteTime = cpu_to_le64(time);
3977 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3978 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3979 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3980 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3981 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
3982 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3983 posix_info->DosAttributes =
3984 S_ISDIR(ksmbd_kstat->kstat->mode) ?
3985 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
3986 if (d_info->hide_dot_file && d_info->name[0] == '.')
3987 posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3988 /*
3989 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
3990 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
3991 * sub_auth(4 * 1(num_subauth)) + RID(4).
3992 */
3993 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
3994 SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
3995 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
3996 SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
3997 memcpy(posix_info->name, conv_name, conv_len);
3998 posix_info->name_len = cpu_to_le32(conv_len);
3999 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
4000 break;
4001 }
4002
4003 } /* switch (info_level) */
4004
4005 d_info->last_entry_offset = d_info->data_count;
4006 d_info->data_count += next_entry_offset;
4007 d_info->out_buf_len -= next_entry_offset;
4008 d_info->wptr += next_entry_offset;
4009
4010 ksmbd_debug(SMB,
4011 "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
4012 info_level, d_info->out_buf_len,
4013 next_entry_offset, d_info->data_count);
4014
4015 free_conv_name:
4016 kfree(conv_name);
4017 return rc;
4018 }
4019
4020 struct smb2_query_dir_private {
4021 struct ksmbd_work *work;
4022 char *search_pattern;
4023 struct ksmbd_file *dir_fp;
4024
4025 struct ksmbd_dir_info *d_info;
4026 int info_level;
4027 };
4028
4029 static void lock_dir(struct ksmbd_file *dir_fp)
4030 {
4031 struct dentry *dir = dir_fp->filp->f_path.dentry;
4032
4033 inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
4034 }
4035
4036 static void unlock_dir(struct ksmbd_file *dir_fp)
4037 {
4038 struct dentry *dir = dir_fp->filp->f_path.dentry;
4039
4040 inode_unlock(d_inode(dir));
4041 }
4042
4043 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
4044 {
4045 struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp);
4046 struct kstat kstat;
4047 struct ksmbd_kstat ksmbd_kstat;
4048 int rc;
4049 int i;
4050
4051 for (i = 0; i < priv->d_info->num_entry; i++) {
4052 struct dentry *dent;
4053
4054 if (dentry_name(priv->d_info, priv->info_level))
4055 return -EINVAL;
4056
4057 lock_dir(priv->dir_fp);
4058 dent = lookup_one(idmap, priv->d_info->name,
4059 priv->dir_fp->filp->f_path.dentry,
4060 priv->d_info->name_len);
4061 unlock_dir(priv->dir_fp);
4062
4063 if (IS_ERR(dent)) {
4064 ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
4065 priv->d_info->name,
4066 PTR_ERR(dent));
4067 continue;
4068 }
4069 if (unlikely(d_is_negative(dent))) {
4070 dput(dent);
4071 ksmbd_debug(SMB, "Negative dentry `%s'\n",
4072 priv->d_info->name);
4073 continue;
4074 }
4075
4076 ksmbd_kstat.kstat = &kstat;
4077 if (priv->info_level != FILE_NAMES_INFORMATION) {
4078 rc = ksmbd_vfs_fill_dentry_attrs(priv->work,
4079 idmap,
4080 dent,
4081 &ksmbd_kstat);
4082 if (rc) {
4083 dput(dent);
4084 continue;
4085 }
4086 }
4087
4088 rc = smb2_populate_readdir_entry(priv->work->conn,
4089 priv->info_level,
4090 priv->d_info,
4091 &ksmbd_kstat);
4092 dput(dent);
4093 if (rc)
4094 return rc;
4095 }
4096 return 0;
4097 }
4098
4099 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
4100 int info_level)
4101 {
4102 int struct_sz;
4103 int conv_len;
4104 int next_entry_offset;
4105
4106 struct_sz = readdir_info_level_struct_sz(info_level);
4107 if (struct_sz == -EOPNOTSUPP)
4108 return -EOPNOTSUPP;
4109
4110 conv_len = (d_info->name_len + 1) * 2;
4111 next_entry_offset = ALIGN(struct_sz + conv_len,
4112 KSMBD_DIR_INFO_ALIGNMENT);
4113
4114 if (next_entry_offset > d_info->out_buf_len) {
4115 d_info->out_buf_len = 0;
4116 return -ENOSPC;
4117 }
4118
4119 switch (info_level) {
4120 case FILE_FULL_DIRECTORY_INFORMATION:
4121 {
4122 struct file_full_directory_info *ffdinfo;
4123
4124 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
4125 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
4126 ffdinfo->FileName[d_info->name_len] = 0x00;
4127 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4128 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4129 break;
4130 }
4131 case FILE_BOTH_DIRECTORY_INFORMATION:
4132 {
4133 struct file_both_directory_info *fbdinfo;
4134
4135 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
4136 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
4137 fbdinfo->FileName[d_info->name_len] = 0x00;
4138 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4139 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4140 break;
4141 }
4142 case FILE_DIRECTORY_INFORMATION:
4143 {
4144 struct file_directory_info *fdinfo;
4145
4146 fdinfo = (struct file_directory_info *)d_info->wptr;
4147 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
4148 fdinfo->FileName[d_info->name_len] = 0x00;
4149 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4150 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4151 break;
4152 }
4153 case FILE_NAMES_INFORMATION:
4154 {
4155 struct file_names_info *fninfo;
4156
4157 fninfo = (struct file_names_info *)d_info->wptr;
4158 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
4159 fninfo->FileName[d_info->name_len] = 0x00;
4160 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
4161 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4162 break;
4163 }
4164 case FILEID_FULL_DIRECTORY_INFORMATION:
4165 {
4166 struct file_id_full_dir_info *dinfo;
4167
4168 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
4169 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
4170 dinfo->FileName[d_info->name_len] = 0x00;
4171 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4172 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4173 break;
4174 }
4175 case FILEID_BOTH_DIRECTORY_INFORMATION:
4176 {
4177 struct file_id_both_directory_info *fibdinfo;
4178
4179 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
4180 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
4181 fibdinfo->FileName[d_info->name_len] = 0x00;
4182 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4183 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4184 break;
4185 }
4186 case SMB_FIND_FILE_POSIX_INFO:
4187 {
4188 struct smb2_posix_info *posix_info;
4189
4190 posix_info = (struct smb2_posix_info *)d_info->wptr;
4191 memcpy(posix_info->name, d_info->name, d_info->name_len);
4192 posix_info->name[d_info->name_len] = 0x00;
4193 posix_info->name_len = cpu_to_le32(d_info->name_len);
4194 posix_info->NextEntryOffset =
4195 cpu_to_le32(next_entry_offset);
4196 break;
4197 }
4198 } /* switch (info_level) */
4199
4200 d_info->num_entry++;
4201 d_info->out_buf_len -= next_entry_offset;
4202 d_info->wptr += next_entry_offset;
4203 return 0;
4204 }
4205
4206 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
4207 loff_t offset, u64 ino, unsigned int d_type)
4208 {
4209 struct ksmbd_readdir_data *buf;
4210 struct smb2_query_dir_private *priv;
4211 struct ksmbd_dir_info *d_info;
4212 int rc;
4213
4214 buf = container_of(ctx, struct ksmbd_readdir_data, ctx);
4215 priv = buf->private;
4216 d_info = priv->d_info;
4217
4218 /* dot and dotdot entries are already reserved */
4219 if (!strcmp(".", name) || !strcmp("..", name))
4220 return true;
4221 if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
4222 return true;
4223 if (!match_pattern(name, namlen, priv->search_pattern))
4224 return true;
4225
4226 d_info->name = name;
4227 d_info->name_len = namlen;
4228 rc = reserve_populate_dentry(d_info, priv->info_level);
4229 if (rc)
4230 return false;
4231 if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
4232 d_info->out_buf_len = 0;
4233 return true;
4234 }
4235
4236 static int verify_info_level(int info_level)
4237 {
4238 switch (info_level) {
4239 case FILE_FULL_DIRECTORY_INFORMATION:
4240 case FILE_BOTH_DIRECTORY_INFORMATION:
4241 case FILE_DIRECTORY_INFORMATION:
4242 case FILE_NAMES_INFORMATION:
4243 case FILEID_FULL_DIRECTORY_INFORMATION:
4244 case FILEID_BOTH_DIRECTORY_INFORMATION:
4245 case SMB_FIND_FILE_POSIX_INFO:
4246 break;
4247 default:
4248 return -EOPNOTSUPP;
4249 }
4250
4251 return 0;
4252 }
4253
4254 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
4255 {
4256 int free_len;
4257
4258 free_len = (int)(work->response_sz -
4259 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
4260 return free_len;
4261 }
4262
4263 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
4264 unsigned short hdr2_len,
4265 unsigned int out_buf_len)
4266 {
4267 int free_len;
4268
4269 if (out_buf_len > work->conn->vals->max_trans_size)
4270 return -EINVAL;
4271
4272 free_len = smb2_resp_buf_len(work, hdr2_len);
4273 if (free_len < 0)
4274 return -EINVAL;
4275
4276 return min_t(int, out_buf_len, free_len);
4277 }
4278
4279 int smb2_query_dir(struct ksmbd_work *work)
4280 {
4281 struct ksmbd_conn *conn = work->conn;
4282 struct smb2_query_directory_req *req;
4283 struct smb2_query_directory_rsp *rsp;
4284 struct ksmbd_share_config *share = work->tcon->share_conf;
4285 struct ksmbd_file *dir_fp = NULL;
4286 struct ksmbd_dir_info d_info;
4287 int rc = 0;
4288 char *srch_ptr = NULL;
4289 unsigned char srch_flag;
4290 int buffer_sz;
4291 struct smb2_query_dir_private query_dir_private = {NULL, };
4292
4293 WORK_BUFFERS(work, req, rsp);
4294
4295 if (ksmbd_override_fsids(work)) {
4296 rsp->hdr.Status = STATUS_NO_MEMORY;
4297 smb2_set_err_rsp(work);
4298 return -ENOMEM;
4299 }
4300
4301 rc = verify_info_level(req->FileInformationClass);
4302 if (rc) {
4303 rc = -EFAULT;
4304 goto err_out2;
4305 }
4306
4307 dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
4308 if (!dir_fp) {
4309 rc = -EBADF;
4310 goto err_out2;
4311 }
4312
4313 if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
4314 inode_permission(file_mnt_idmap(dir_fp->filp),
4315 file_inode(dir_fp->filp),
4316 MAY_READ | MAY_EXEC)) {
4317 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
4318 rc = -EACCES;
4319 goto err_out2;
4320 }
4321
4322 if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
4323 pr_err("can't do query dir for a file\n");
4324 rc = -EINVAL;
4325 goto err_out2;
4326 }
4327
4328 srch_flag = req->Flags;
4329 srch_ptr = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->FileNameOffset),
4330 le16_to_cpu(req->FileNameLength), 1,
4331 conn->local_nls);
4332 if (IS_ERR(srch_ptr)) {
4333 ksmbd_debug(SMB, "Search Pattern not found\n");
4334 rc = -EINVAL;
4335 goto err_out2;
4336 } else {
4337 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
4338 }
4339
4340 if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
4341 ksmbd_debug(SMB, "Restart directory scan\n");
4342 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
4343 }
4344
4345 memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
4346 d_info.wptr = (char *)rsp->Buffer;
4347 d_info.rptr = (char *)rsp->Buffer;
4348 d_info.out_buf_len =
4349 smb2_calc_max_out_buf_len(work, 8,
4350 le32_to_cpu(req->OutputBufferLength));
4351 if (d_info.out_buf_len < 0) {
4352 rc = -EINVAL;
4353 goto err_out;
4354 }
4355 d_info.flags = srch_flag;
4356
4357 /*
4358 * reserve dot and dotdot entries in head of buffer
4359 * in first response
4360 */
4361 rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
4362 dir_fp, &d_info, srch_ptr,
4363 smb2_populate_readdir_entry);
4364 if (rc == -ENOSPC)
4365 rc = 0;
4366 else if (rc)
4367 goto err_out;
4368
4369 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
4370 d_info.hide_dot_file = true;
4371
4372 buffer_sz = d_info.out_buf_len;
4373 d_info.rptr = d_info.wptr;
4374 query_dir_private.work = work;
4375 query_dir_private.search_pattern = srch_ptr;
4376 query_dir_private.dir_fp = dir_fp;
4377 query_dir_private.d_info = &d_info;
4378 query_dir_private.info_level = req->FileInformationClass;
4379 dir_fp->readdir_data.private = &query_dir_private;
4380 set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
4381
4382 rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
4383 /*
4384 * req->OutputBufferLength is too small to contain even one entry.
4385 * In this case, it immediately returns OutputBufferLength 0 to client.
4386 */
4387 if (!d_info.out_buf_len && !d_info.num_entry)
4388 goto no_buf_len;
4389 if (rc > 0 || rc == -ENOSPC)
4390 rc = 0;
4391 else if (rc)
4392 goto err_out;
4393
4394 d_info.wptr = d_info.rptr;
4395 d_info.out_buf_len = buffer_sz;
4396 rc = process_query_dir_entries(&query_dir_private);
4397 if (rc)
4398 goto err_out;
4399
4400 if (!d_info.data_count && d_info.out_buf_len >= 0) {
4401 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
4402 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4403 } else {
4404 dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
4405 rsp->hdr.Status = STATUS_NO_MORE_FILES;
4406 }
4407 rsp->StructureSize = cpu_to_le16(9);
4408 rsp->OutputBufferOffset = cpu_to_le16(0);
4409 rsp->OutputBufferLength = cpu_to_le32(0);
4410 rsp->Buffer[0] = 0;
4411 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4412 offsetof(struct smb2_query_directory_rsp, Buffer)
4413 + 1);
4414 if (rc)
4415 goto err_out;
4416 } else {
4417 no_buf_len:
4418 ((struct file_directory_info *)
4419 ((char *)rsp->Buffer + d_info.last_entry_offset))
4420 ->NextEntryOffset = 0;
4421 if (d_info.data_count >= d_info.last_entry_off_align)
4422 d_info.data_count -= d_info.last_entry_off_align;
4423
4424 rsp->StructureSize = cpu_to_le16(9);
4425 rsp->OutputBufferOffset = cpu_to_le16(72);
4426 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
4427 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4428 offsetof(struct smb2_query_directory_rsp, Buffer) +
4429 d_info.data_count);
4430 if (rc)
4431 goto err_out;
4432 }
4433
4434 kfree(srch_ptr);
4435 ksmbd_fd_put(work, dir_fp);
4436 ksmbd_revert_fsids(work);
4437 return 0;
4438
4439 err_out:
4440 pr_err("error while processing smb2 query dir rc = %d\n", rc);
4441 kfree(srch_ptr);
4442
4443 err_out2:
4444 if (rc == -EINVAL)
4445 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
4446 else if (rc == -EACCES)
4447 rsp->hdr.Status = STATUS_ACCESS_DENIED;
4448 else if (rc == -ENOENT)
4449 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4450 else if (rc == -EBADF)
4451 rsp->hdr.Status = STATUS_FILE_CLOSED;
4452 else if (rc == -ENOMEM)
4453 rsp->hdr.Status = STATUS_NO_MEMORY;
4454 else if (rc == -EFAULT)
4455 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4456 else if (rc == -EIO)
4457 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
4458 if (!rsp->hdr.Status)
4459 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4460
4461 smb2_set_err_rsp(work);
4462 ksmbd_fd_put(work, dir_fp);
4463 ksmbd_revert_fsids(work);
4464 return 0;
4465 }
4466
4467 /**
4468 * buffer_check_err() - helper function to check buffer errors
4469 * @reqOutputBufferLength: max buffer length expected in command response
4470 * @rsp: query info response buffer contains output buffer length
4471 * @rsp_org: base response buffer pointer in case of chained response
4472 *
4473 * Return: 0 on success, otherwise error
4474 */
4475 static int buffer_check_err(int reqOutputBufferLength,
4476 struct smb2_query_info_rsp *rsp,
4477 void *rsp_org)
4478 {
4479 if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4480 pr_err("Invalid Buffer Size Requested\n");
4481 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4482 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4483 return -EINVAL;
4484 }
4485 return 0;
4486 }
4487
4488 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4489 void *rsp_org)
4490 {
4491 struct smb2_file_standard_info *sinfo;
4492
4493 sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4494
4495 sinfo->AllocationSize = cpu_to_le64(4096);
4496 sinfo->EndOfFile = cpu_to_le64(0);
4497 sinfo->NumberOfLinks = cpu_to_le32(1);
4498 sinfo->DeletePending = 1;
4499 sinfo->Directory = 0;
4500 rsp->OutputBufferLength =
4501 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4502 }
4503
4504 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4505 void *rsp_org)
4506 {
4507 struct smb2_file_internal_info *file_info;
4508
4509 file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4510
4511 /* any unique number */
4512 file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4513 rsp->OutputBufferLength =
4514 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4515 }
4516
4517 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4518 struct smb2_query_info_req *req,
4519 struct smb2_query_info_rsp *rsp,
4520 void *rsp_org)
4521 {
4522 u64 id;
4523 int rc;
4524
4525 /*
4526 * Windows can sometime send query file info request on
4527 * pipe without opening it, checking error condition here
4528 */
4529 id = req->VolatileFileId;
4530 if (!ksmbd_session_rpc_method(sess, id))
4531 return -ENOENT;
4532
4533 ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4534 req->FileInfoClass, req->VolatileFileId);
4535
4536 switch (req->FileInfoClass) {
4537 case FILE_STANDARD_INFORMATION:
4538 get_standard_info_pipe(rsp, rsp_org);
4539 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4540 rsp, rsp_org);
4541 break;
4542 case FILE_INTERNAL_INFORMATION:
4543 get_internal_info_pipe(rsp, id, rsp_org);
4544 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4545 rsp, rsp_org);
4546 break;
4547 default:
4548 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4549 req->FileInfoClass);
4550 rc = -EOPNOTSUPP;
4551 }
4552 return rc;
4553 }
4554
4555 /**
4556 * smb2_get_ea() - handler for smb2 get extended attribute command
4557 * @work: smb work containing query info command buffer
4558 * @fp: ksmbd_file pointer
4559 * @req: get extended attribute request
4560 * @rsp: response buffer pointer
4561 * @rsp_org: base response buffer pointer in case of chained response
4562 *
4563 * Return: 0 on success, otherwise error
4564 */
4565 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4566 struct smb2_query_info_req *req,
4567 struct smb2_query_info_rsp *rsp, void *rsp_org)
4568 {
4569 struct smb2_ea_info *eainfo, *prev_eainfo;
4570 char *name, *ptr, *xattr_list = NULL, *buf;
4571 int rc, name_len, value_len, xattr_list_len, idx;
4572 ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4573 struct smb2_ea_info_req *ea_req = NULL;
4574 const struct path *path;
4575 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4576
4577 if (!(fp->daccess & FILE_READ_EA_LE)) {
4578 pr_err("Not permitted to read ext attr : 0x%x\n",
4579 fp->daccess);
4580 return -EACCES;
4581 }
4582
4583 path = &fp->filp->f_path;
4584 /* single EA entry is requested with given user.* name */
4585 if (req->InputBufferLength) {
4586 if (le32_to_cpu(req->InputBufferLength) <=
4587 sizeof(struct smb2_ea_info_req))
4588 return -EINVAL;
4589
4590 ea_req = (struct smb2_ea_info_req *)((char *)req +
4591 le16_to_cpu(req->InputBufferOffset));
4592 } else {
4593 /* need to send all EAs, if no specific EA is requested*/
4594 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4595 ksmbd_debug(SMB,
4596 "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4597 le32_to_cpu(req->Flags));
4598 }
4599
4600 buf_free_len =
4601 smb2_calc_max_out_buf_len(work, 8,
4602 le32_to_cpu(req->OutputBufferLength));
4603 if (buf_free_len < 0)
4604 return -EINVAL;
4605
4606 rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4607 if (rc < 0) {
4608 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4609 goto out;
4610 } else if (!rc) { /* there is no EA in the file */
4611 ksmbd_debug(SMB, "no ea data in the file\n");
4612 goto done;
4613 }
4614 xattr_list_len = rc;
4615
4616 ptr = (char *)rsp->Buffer;
4617 eainfo = (struct smb2_ea_info *)ptr;
4618 prev_eainfo = eainfo;
4619 idx = 0;
4620
4621 while (idx < xattr_list_len) {
4622 name = xattr_list + idx;
4623 name_len = strlen(name);
4624
4625 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4626 idx += name_len + 1;
4627
4628 /*
4629 * CIFS does not support EA other than user.* namespace,
4630 * still keep the framework generic, to list other attrs
4631 * in future.
4632 */
4633 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4634 continue;
4635
4636 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4637 STREAM_PREFIX_LEN))
4638 continue;
4639
4640 if (req->InputBufferLength &&
4641 strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4642 ea_req->EaNameLength))
4643 continue;
4644
4645 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4646 DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4647 continue;
4648
4649 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4650 name_len -= XATTR_USER_PREFIX_LEN;
4651
4652 ptr = eainfo->name + name_len + 1;
4653 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4654 name_len + 1);
4655 /* bailout if xattr can't fit in buf_free_len */
4656 value_len = ksmbd_vfs_getxattr(idmap, path->dentry,
4657 name, &buf);
4658 if (value_len <= 0) {
4659 rc = -ENOENT;
4660 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4661 goto out;
4662 }
4663
4664 buf_free_len -= value_len;
4665 if (buf_free_len < 0) {
4666 kfree(buf);
4667 break;
4668 }
4669
4670 memcpy(ptr, buf, value_len);
4671 kfree(buf);
4672
4673 ptr += value_len;
4674 eainfo->Flags = 0;
4675 eainfo->EaNameLength = name_len;
4676
4677 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4678 memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4679 name_len);
4680 else
4681 memcpy(eainfo->name, name, name_len);
4682
4683 eainfo->name[name_len] = '\0';
4684 eainfo->EaValueLength = cpu_to_le16(value_len);
4685 next_offset = offsetof(struct smb2_ea_info, name) +
4686 name_len + 1 + value_len;
4687
4688 /* align next xattr entry at 4 byte bundary */
4689 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4690 if (alignment_bytes) {
4691 memset(ptr, '\0', alignment_bytes);
4692 ptr += alignment_bytes;
4693 next_offset += alignment_bytes;
4694 buf_free_len -= alignment_bytes;
4695 }
4696 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4697 prev_eainfo = eainfo;
4698 eainfo = (struct smb2_ea_info *)ptr;
4699 rsp_data_cnt += next_offset;
4700
4701 if (req->InputBufferLength) {
4702 ksmbd_debug(SMB, "single entry requested\n");
4703 break;
4704 }
4705 }
4706
4707 /* no more ea entries */
4708 prev_eainfo->NextEntryOffset = 0;
4709 done:
4710 rc = 0;
4711 if (rsp_data_cnt == 0)
4712 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4713 rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4714 out:
4715 kvfree(xattr_list);
4716 return rc;
4717 }
4718
4719 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4720 struct ksmbd_file *fp, void *rsp_org)
4721 {
4722 struct smb2_file_access_info *file_info;
4723
4724 file_info = (struct smb2_file_access_info *)rsp->Buffer;
4725 file_info->AccessFlags = fp->daccess;
4726 rsp->OutputBufferLength =
4727 cpu_to_le32(sizeof(struct smb2_file_access_info));
4728 }
4729
4730 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4731 struct ksmbd_file *fp, void *rsp_org)
4732 {
4733 struct smb2_file_basic_info *basic_info;
4734 struct kstat stat;
4735 u64 time;
4736 int ret;
4737
4738 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4739 pr_err("no right to read the attributes : 0x%x\n",
4740 fp->daccess);
4741 return -EACCES;
4742 }
4743
4744 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4745 AT_STATX_SYNC_AS_STAT);
4746 if (ret)
4747 return ret;
4748
4749 basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4750 basic_info->CreationTime = cpu_to_le64(fp->create_time);
4751 time = ksmbd_UnixTimeToNT(stat.atime);
4752 basic_info->LastAccessTime = cpu_to_le64(time);
4753 time = ksmbd_UnixTimeToNT(stat.mtime);
4754 basic_info->LastWriteTime = cpu_to_le64(time);
4755 time = ksmbd_UnixTimeToNT(stat.ctime);
4756 basic_info->ChangeTime = cpu_to_le64(time);
4757 basic_info->Attributes = fp->f_ci->m_fattr;
4758 basic_info->Pad1 = 0;
4759 rsp->OutputBufferLength =
4760 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4761 return 0;
4762 }
4763
4764 static int get_file_standard_info(struct smb2_query_info_rsp *rsp,
4765 struct ksmbd_file *fp, void *rsp_org)
4766 {
4767 struct smb2_file_standard_info *sinfo;
4768 unsigned int delete_pending;
4769 struct kstat stat;
4770 int ret;
4771
4772 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4773 AT_STATX_SYNC_AS_STAT);
4774 if (ret)
4775 return ret;
4776
4777 sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4778 delete_pending = ksmbd_inode_pending_delete(fp);
4779
4780 sinfo->AllocationSize = cpu_to_le64(stat.blocks << 9);
4781 sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4782 sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4783 sinfo->DeletePending = delete_pending;
4784 sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4785 rsp->OutputBufferLength =
4786 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4787
4788 return 0;
4789 }
4790
4791 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4792 void *rsp_org)
4793 {
4794 struct smb2_file_alignment_info *file_info;
4795
4796 file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4797 file_info->AlignmentRequirement = 0;
4798 rsp->OutputBufferLength =
4799 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4800 }
4801
4802 static int get_file_all_info(struct ksmbd_work *work,
4803 struct smb2_query_info_rsp *rsp,
4804 struct ksmbd_file *fp,
4805 void *rsp_org)
4806 {
4807 struct ksmbd_conn *conn = work->conn;
4808 struct smb2_file_all_info *file_info;
4809 unsigned int delete_pending;
4810 struct kstat stat;
4811 int conv_len;
4812 char *filename;
4813 u64 time;
4814 int ret;
4815
4816 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4817 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4818 fp->daccess);
4819 return -EACCES;
4820 }
4821
4822 filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
4823 if (IS_ERR(filename))
4824 return PTR_ERR(filename);
4825
4826 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4827 AT_STATX_SYNC_AS_STAT);
4828 if (ret)
4829 return ret;
4830
4831 ksmbd_debug(SMB, "filename = %s\n", filename);
4832 delete_pending = ksmbd_inode_pending_delete(fp);
4833 file_info = (struct smb2_file_all_info *)rsp->Buffer;
4834
4835 file_info->CreationTime = cpu_to_le64(fp->create_time);
4836 time = ksmbd_UnixTimeToNT(stat.atime);
4837 file_info->LastAccessTime = cpu_to_le64(time);
4838 time = ksmbd_UnixTimeToNT(stat.mtime);
4839 file_info->LastWriteTime = cpu_to_le64(time);
4840 time = ksmbd_UnixTimeToNT(stat.ctime);
4841 file_info->ChangeTime = cpu_to_le64(time);
4842 file_info->Attributes = fp->f_ci->m_fattr;
4843 file_info->Pad1 = 0;
4844 file_info->AllocationSize =
4845 cpu_to_le64(stat.blocks << 9);
4846 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4847 file_info->NumberOfLinks =
4848 cpu_to_le32(get_nlink(&stat) - delete_pending);
4849 file_info->DeletePending = delete_pending;
4850 file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4851 file_info->Pad2 = 0;
4852 file_info->IndexNumber = cpu_to_le64(stat.ino);
4853 file_info->EASize = 0;
4854 file_info->AccessFlags = fp->daccess;
4855 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4856 file_info->Mode = fp->coption;
4857 file_info->AlignmentRequirement = 0;
4858 conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4859 PATH_MAX, conn->local_nls, 0);
4860 conv_len *= 2;
4861 file_info->FileNameLength = cpu_to_le32(conv_len);
4862 rsp->OutputBufferLength =
4863 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4864 kfree(filename);
4865 return 0;
4866 }
4867
4868 static void get_file_alternate_info(struct ksmbd_work *work,
4869 struct smb2_query_info_rsp *rsp,
4870 struct ksmbd_file *fp,
4871 void *rsp_org)
4872 {
4873 struct ksmbd_conn *conn = work->conn;
4874 struct smb2_file_alt_name_info *file_info;
4875 struct dentry *dentry = fp->filp->f_path.dentry;
4876 int conv_len;
4877
4878 spin_lock(&dentry->d_lock);
4879 file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4880 conv_len = ksmbd_extract_shortname(conn,
4881 dentry->d_name.name,
4882 file_info->FileName);
4883 spin_unlock(&dentry->d_lock);
4884 file_info->FileNameLength = cpu_to_le32(conv_len);
4885 rsp->OutputBufferLength =
4886 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4887 }
4888
4889 static int get_file_stream_info(struct ksmbd_work *work,
4890 struct smb2_query_info_rsp *rsp,
4891 struct ksmbd_file *fp,
4892 void *rsp_org)
4893 {
4894 struct ksmbd_conn *conn = work->conn;
4895 struct smb2_file_stream_info *file_info;
4896 char *stream_name, *xattr_list = NULL, *stream_buf;
4897 struct kstat stat;
4898 const struct path *path = &fp->filp->f_path;
4899 ssize_t xattr_list_len;
4900 int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4901 int buf_free_len;
4902 struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4903 int ret;
4904
4905 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4906 AT_STATX_SYNC_AS_STAT);
4907 if (ret)
4908 return ret;
4909
4910 file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4911
4912 buf_free_len =
4913 smb2_calc_max_out_buf_len(work, 8,
4914 le32_to_cpu(req->OutputBufferLength));
4915 if (buf_free_len < 0)
4916 goto out;
4917
4918 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4919 if (xattr_list_len < 0) {
4920 goto out;
4921 } else if (!xattr_list_len) {
4922 ksmbd_debug(SMB, "empty xattr in the file\n");
4923 goto out;
4924 }
4925
4926 while (idx < xattr_list_len) {
4927 stream_name = xattr_list + idx;
4928 streamlen = strlen(stream_name);
4929 idx += streamlen + 1;
4930
4931 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4932
4933 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4934 STREAM_PREFIX, STREAM_PREFIX_LEN))
4935 continue;
4936
4937 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4938 STREAM_PREFIX_LEN);
4939 streamlen = stream_name_len;
4940
4941 /* plus : size */
4942 streamlen += 1;
4943 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4944 if (!stream_buf)
4945 break;
4946
4947 streamlen = snprintf(stream_buf, streamlen + 1,
4948 ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4949
4950 next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4951 if (next > buf_free_len) {
4952 kfree(stream_buf);
4953 break;
4954 }
4955
4956 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4957 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4958 stream_buf, streamlen,
4959 conn->local_nls, 0);
4960 streamlen *= 2;
4961 kfree(stream_buf);
4962 file_info->StreamNameLength = cpu_to_le32(streamlen);
4963 file_info->StreamSize = cpu_to_le64(stream_name_len);
4964 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4965
4966 nbytes += next;
4967 buf_free_len -= next;
4968 file_info->NextEntryOffset = cpu_to_le32(next);
4969 }
4970
4971 out:
4972 if (!S_ISDIR(stat.mode) &&
4973 buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
4974 file_info = (struct smb2_file_stream_info *)
4975 &rsp->Buffer[nbytes];
4976 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4977 "::$DATA", 7, conn->local_nls, 0);
4978 streamlen *= 2;
4979 file_info->StreamNameLength = cpu_to_le32(streamlen);
4980 file_info->StreamSize = cpu_to_le64(stat.size);
4981 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
4982 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4983 }
4984
4985 /* last entry offset should be 0 */
4986 file_info->NextEntryOffset = 0;
4987 kvfree(xattr_list);
4988
4989 rsp->OutputBufferLength = cpu_to_le32(nbytes);
4990
4991 return 0;
4992 }
4993
4994 static int get_file_internal_info(struct smb2_query_info_rsp *rsp,
4995 struct ksmbd_file *fp, void *rsp_org)
4996 {
4997 struct smb2_file_internal_info *file_info;
4998 struct kstat stat;
4999 int ret;
5000
5001 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5002 AT_STATX_SYNC_AS_STAT);
5003 if (ret)
5004 return ret;
5005
5006 file_info = (struct smb2_file_internal_info *)rsp->Buffer;
5007 file_info->IndexNumber = cpu_to_le64(stat.ino);
5008 rsp->OutputBufferLength =
5009 cpu_to_le32(sizeof(struct smb2_file_internal_info));
5010
5011 return 0;
5012 }
5013
5014 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
5015 struct ksmbd_file *fp, void *rsp_org)
5016 {
5017 struct smb2_file_ntwrk_info *file_info;
5018 struct kstat stat;
5019 u64 time;
5020 int ret;
5021
5022 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
5023 pr_err("no right to read the attributes : 0x%x\n",
5024 fp->daccess);
5025 return -EACCES;
5026 }
5027
5028 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5029 AT_STATX_SYNC_AS_STAT);
5030 if (ret)
5031 return ret;
5032
5033 file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
5034
5035 file_info->CreationTime = cpu_to_le64(fp->create_time);
5036 time = ksmbd_UnixTimeToNT(stat.atime);
5037 file_info->LastAccessTime = cpu_to_le64(time);
5038 time = ksmbd_UnixTimeToNT(stat.mtime);
5039 file_info->LastWriteTime = cpu_to_le64(time);
5040 time = ksmbd_UnixTimeToNT(stat.ctime);
5041 file_info->ChangeTime = cpu_to_le64(time);
5042 file_info->Attributes = fp->f_ci->m_fattr;
5043 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9);
5044 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
5045 file_info->Reserved = cpu_to_le32(0);
5046 rsp->OutputBufferLength =
5047 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
5048 return 0;
5049 }
5050
5051 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
5052 {
5053 struct smb2_file_ea_info *file_info;
5054
5055 file_info = (struct smb2_file_ea_info *)rsp->Buffer;
5056 file_info->EASize = 0;
5057 rsp->OutputBufferLength =
5058 cpu_to_le32(sizeof(struct smb2_file_ea_info));
5059 }
5060
5061 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
5062 struct ksmbd_file *fp, void *rsp_org)
5063 {
5064 struct smb2_file_pos_info *file_info;
5065
5066 file_info = (struct smb2_file_pos_info *)rsp->Buffer;
5067 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
5068 rsp->OutputBufferLength =
5069 cpu_to_le32(sizeof(struct smb2_file_pos_info));
5070 }
5071
5072 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
5073 struct ksmbd_file *fp, void *rsp_org)
5074 {
5075 struct smb2_file_mode_info *file_info;
5076
5077 file_info = (struct smb2_file_mode_info *)rsp->Buffer;
5078 file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
5079 rsp->OutputBufferLength =
5080 cpu_to_le32(sizeof(struct smb2_file_mode_info));
5081 }
5082
5083 static int get_file_compression_info(struct smb2_query_info_rsp *rsp,
5084 struct ksmbd_file *fp, void *rsp_org)
5085 {
5086 struct smb2_file_comp_info *file_info;
5087 struct kstat stat;
5088 int ret;
5089
5090 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5091 AT_STATX_SYNC_AS_STAT);
5092 if (ret)
5093 return ret;
5094
5095 file_info = (struct smb2_file_comp_info *)rsp->Buffer;
5096 file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
5097 file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
5098 file_info->CompressionUnitShift = 0;
5099 file_info->ChunkShift = 0;
5100 file_info->ClusterShift = 0;
5101 memset(&file_info->Reserved[0], 0, 3);
5102
5103 rsp->OutputBufferLength =
5104 cpu_to_le32(sizeof(struct smb2_file_comp_info));
5105
5106 return 0;
5107 }
5108
5109 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
5110 struct ksmbd_file *fp, void *rsp_org)
5111 {
5112 struct smb2_file_attr_tag_info *file_info;
5113
5114 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
5115 pr_err("no right to read the attributes : 0x%x\n",
5116 fp->daccess);
5117 return -EACCES;
5118 }
5119
5120 file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
5121 file_info->FileAttributes = fp->f_ci->m_fattr;
5122 file_info->ReparseTag = 0;
5123 rsp->OutputBufferLength =
5124 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
5125 return 0;
5126 }
5127
5128 static int find_file_posix_info(struct smb2_query_info_rsp *rsp,
5129 struct ksmbd_file *fp, void *rsp_org)
5130 {
5131 struct smb311_posix_qinfo *file_info;
5132 struct inode *inode = file_inode(fp->filp);
5133 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
5134 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
5135 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
5136 struct kstat stat;
5137 u64 time;
5138 int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
5139 int ret;
5140
5141 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5142 AT_STATX_SYNC_AS_STAT);
5143 if (ret)
5144 return ret;
5145
5146 file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
5147 file_info->CreationTime = cpu_to_le64(fp->create_time);
5148 time = ksmbd_UnixTimeToNT(stat.atime);
5149 file_info->LastAccessTime = cpu_to_le64(time);
5150 time = ksmbd_UnixTimeToNT(stat.mtime);
5151 file_info->LastWriteTime = cpu_to_le64(time);
5152 time = ksmbd_UnixTimeToNT(stat.ctime);
5153 file_info->ChangeTime = cpu_to_le64(time);
5154 file_info->DosAttributes = fp->f_ci->m_fattr;
5155 file_info->Inode = cpu_to_le64(stat.ino);
5156 file_info->EndOfFile = cpu_to_le64(stat.size);
5157 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9);
5158 file_info->HardLinks = cpu_to_le32(stat.nlink);
5159 file_info->Mode = cpu_to_le32(stat.mode & 0777);
5160 file_info->DeviceId = cpu_to_le32(stat.rdev);
5161
5162 /*
5163 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
5164 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
5165 * sub_auth(4 * 1(num_subauth)) + RID(4).
5166 */
5167 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
5168 SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
5169 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
5170 SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
5171
5172 rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
5173
5174 return 0;
5175 }
5176
5177 static int smb2_get_info_file(struct ksmbd_work *work,
5178 struct smb2_query_info_req *req,
5179 struct smb2_query_info_rsp *rsp)
5180 {
5181 struct ksmbd_file *fp;
5182 int fileinfoclass = 0;
5183 int rc = 0;
5184 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5185
5186 if (test_share_config_flag(work->tcon->share_conf,
5187 KSMBD_SHARE_FLAG_PIPE)) {
5188 /* smb2 info file called for pipe */
5189 return smb2_get_info_file_pipe(work->sess, req, rsp,
5190 work->response_buf);
5191 }
5192
5193 if (work->next_smb2_rcv_hdr_off) {
5194 if (!has_file_id(req->VolatileFileId)) {
5195 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5196 work->compound_fid);
5197 id = work->compound_fid;
5198 pid = work->compound_pfid;
5199 }
5200 }
5201
5202 if (!has_file_id(id)) {
5203 id = req->VolatileFileId;
5204 pid = req->PersistentFileId;
5205 }
5206
5207 fp = ksmbd_lookup_fd_slow(work, id, pid);
5208 if (!fp)
5209 return -ENOENT;
5210
5211 fileinfoclass = req->FileInfoClass;
5212
5213 switch (fileinfoclass) {
5214 case FILE_ACCESS_INFORMATION:
5215 get_file_access_info(rsp, fp, work->response_buf);
5216 break;
5217
5218 case FILE_BASIC_INFORMATION:
5219 rc = get_file_basic_info(rsp, fp, work->response_buf);
5220 break;
5221
5222 case FILE_STANDARD_INFORMATION:
5223 rc = get_file_standard_info(rsp, fp, work->response_buf);
5224 break;
5225
5226 case FILE_ALIGNMENT_INFORMATION:
5227 get_file_alignment_info(rsp, work->response_buf);
5228 break;
5229
5230 case FILE_ALL_INFORMATION:
5231 rc = get_file_all_info(work, rsp, fp, work->response_buf);
5232 break;
5233
5234 case FILE_ALTERNATE_NAME_INFORMATION:
5235 get_file_alternate_info(work, rsp, fp, work->response_buf);
5236 break;
5237
5238 case FILE_STREAM_INFORMATION:
5239 rc = get_file_stream_info(work, rsp, fp, work->response_buf);
5240 break;
5241
5242 case FILE_INTERNAL_INFORMATION:
5243 rc = get_file_internal_info(rsp, fp, work->response_buf);
5244 break;
5245
5246 case FILE_NETWORK_OPEN_INFORMATION:
5247 rc = get_file_network_open_info(rsp, fp, work->response_buf);
5248 break;
5249
5250 case FILE_EA_INFORMATION:
5251 get_file_ea_info(rsp, work->response_buf);
5252 break;
5253
5254 case FILE_FULL_EA_INFORMATION:
5255 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
5256 break;
5257
5258 case FILE_POSITION_INFORMATION:
5259 get_file_position_info(rsp, fp, work->response_buf);
5260 break;
5261
5262 case FILE_MODE_INFORMATION:
5263 get_file_mode_info(rsp, fp, work->response_buf);
5264 break;
5265
5266 case FILE_COMPRESSION_INFORMATION:
5267 rc = get_file_compression_info(rsp, fp, work->response_buf);
5268 break;
5269
5270 case FILE_ATTRIBUTE_TAG_INFORMATION:
5271 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
5272 break;
5273 case SMB_FIND_FILE_POSIX_INFO:
5274 if (!work->tcon->posix_extensions) {
5275 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5276 rc = -EOPNOTSUPP;
5277 } else {
5278 rc = find_file_posix_info(rsp, fp, work->response_buf);
5279 }
5280 break;
5281 default:
5282 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
5283 fileinfoclass);
5284 rc = -EOPNOTSUPP;
5285 }
5286 if (!rc)
5287 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5288 rsp, work->response_buf);
5289 ksmbd_fd_put(work, fp);
5290 return rc;
5291 }
5292
5293 static int smb2_get_info_filesystem(struct ksmbd_work *work,
5294 struct smb2_query_info_req *req,
5295 struct smb2_query_info_rsp *rsp)
5296 {
5297 struct ksmbd_session *sess = work->sess;
5298 struct ksmbd_conn *conn = work->conn;
5299 struct ksmbd_share_config *share = work->tcon->share_conf;
5300 int fsinfoclass = 0;
5301 struct kstatfs stfs;
5302 struct path path;
5303 int rc = 0, len;
5304
5305 if (!share->path)
5306 return -EIO;
5307
5308 rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
5309 if (rc) {
5310 pr_err("cannot create vfs path\n");
5311 return -EIO;
5312 }
5313
5314 rc = vfs_statfs(&path, &stfs);
5315 if (rc) {
5316 pr_err("cannot do stat of path %s\n", share->path);
5317 path_put(&path);
5318 return -EIO;
5319 }
5320
5321 fsinfoclass = req->FileInfoClass;
5322
5323 switch (fsinfoclass) {
5324 case FS_DEVICE_INFORMATION:
5325 {
5326 struct filesystem_device_info *info;
5327
5328 info = (struct filesystem_device_info *)rsp->Buffer;
5329
5330 info->DeviceType = cpu_to_le32(FILE_DEVICE_DISK);
5331 info->DeviceCharacteristics =
5332 cpu_to_le32(FILE_DEVICE_IS_MOUNTED);
5333 if (!test_tree_conn_flag(work->tcon,
5334 KSMBD_TREE_CONN_FLAG_WRITABLE))
5335 info->DeviceCharacteristics |=
5336 cpu_to_le32(FILE_READ_ONLY_DEVICE);
5337 rsp->OutputBufferLength = cpu_to_le32(8);
5338 break;
5339 }
5340 case FS_ATTRIBUTE_INFORMATION:
5341 {
5342 struct filesystem_attribute_info *info;
5343 size_t sz;
5344
5345 info = (struct filesystem_attribute_info *)rsp->Buffer;
5346 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
5347 FILE_PERSISTENT_ACLS |
5348 FILE_UNICODE_ON_DISK |
5349 FILE_CASE_PRESERVED_NAMES |
5350 FILE_CASE_SENSITIVE_SEARCH |
5351 FILE_SUPPORTS_BLOCK_REFCOUNTING);
5352
5353 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
5354
5355 if (test_share_config_flag(work->tcon->share_conf,
5356 KSMBD_SHARE_FLAG_STREAMS))
5357 info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS);
5358
5359 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
5360 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
5361 "NTFS", PATH_MAX, conn->local_nls, 0);
5362 len = len * 2;
5363 info->FileSystemNameLen = cpu_to_le32(len);
5364 sz = sizeof(struct filesystem_attribute_info) + len;
5365 rsp->OutputBufferLength = cpu_to_le32(sz);
5366 break;
5367 }
5368 case FS_VOLUME_INFORMATION:
5369 {
5370 struct filesystem_vol_info *info;
5371 size_t sz;
5372 unsigned int serial_crc = 0;
5373
5374 info = (struct filesystem_vol_info *)(rsp->Buffer);
5375 info->VolumeCreationTime = 0;
5376 serial_crc = crc32_le(serial_crc, share->name,
5377 strlen(share->name));
5378 serial_crc = crc32_le(serial_crc, share->path,
5379 strlen(share->path));
5380 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
5381 strlen(ksmbd_netbios_name()));
5382 /* Taking dummy value of serial number*/
5383 info->SerialNumber = cpu_to_le32(serial_crc);
5384 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
5385 share->name, PATH_MAX,
5386 conn->local_nls, 0);
5387 len = len * 2;
5388 info->VolumeLabelSize = cpu_to_le32(len);
5389 info->Reserved = 0;
5390 sz = sizeof(struct filesystem_vol_info) + len;
5391 rsp->OutputBufferLength = cpu_to_le32(sz);
5392 break;
5393 }
5394 case FS_SIZE_INFORMATION:
5395 {
5396 struct filesystem_info *info;
5397
5398 info = (struct filesystem_info *)(rsp->Buffer);
5399 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5400 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
5401 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5402 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5403 rsp->OutputBufferLength = cpu_to_le32(24);
5404 break;
5405 }
5406 case FS_FULL_SIZE_INFORMATION:
5407 {
5408 struct smb2_fs_full_size_info *info;
5409
5410 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
5411 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5412 info->CallerAvailableAllocationUnits =
5413 cpu_to_le64(stfs.f_bavail);
5414 info->ActualAvailableAllocationUnits =
5415 cpu_to_le64(stfs.f_bfree);
5416 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5417 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5418 rsp->OutputBufferLength = cpu_to_le32(32);
5419 break;
5420 }
5421 case FS_OBJECT_ID_INFORMATION:
5422 {
5423 struct object_id_info *info;
5424
5425 info = (struct object_id_info *)(rsp->Buffer);
5426
5427 if (!user_guest(sess->user))
5428 memcpy(info->objid, user_passkey(sess->user), 16);
5429 else
5430 memset(info->objid, 0, 16);
5431
5432 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
5433 info->extended_info.version = cpu_to_le32(1);
5434 info->extended_info.release = cpu_to_le32(1);
5435 info->extended_info.rel_date = 0;
5436 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5437 rsp->OutputBufferLength = cpu_to_le32(64);
5438 break;
5439 }
5440 case FS_SECTOR_SIZE_INFORMATION:
5441 {
5442 struct smb3_fs_ss_info *info;
5443 unsigned int sector_size =
5444 min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
5445
5446 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5447
5448 info->LogicalBytesPerSector = cpu_to_le32(sector_size);
5449 info->PhysicalBytesPerSectorForAtomicity =
5450 cpu_to_le32(sector_size);
5451 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
5452 info->FSEffPhysicalBytesPerSectorForAtomicity =
5453 cpu_to_le32(sector_size);
5454 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5455 SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5456 info->ByteOffsetForSectorAlignment = 0;
5457 info->ByteOffsetForPartitionAlignment = 0;
5458 rsp->OutputBufferLength = cpu_to_le32(28);
5459 break;
5460 }
5461 case FS_CONTROL_INFORMATION:
5462 {
5463 /*
5464 * TODO : The current implementation is based on
5465 * test result with win7(NTFS) server. It's need to
5466 * modify this to get valid Quota values
5467 * from Linux kernel
5468 */
5469 struct smb2_fs_control_info *info;
5470
5471 info = (struct smb2_fs_control_info *)(rsp->Buffer);
5472 info->FreeSpaceStartFiltering = 0;
5473 info->FreeSpaceThreshold = 0;
5474 info->FreeSpaceStopFiltering = 0;
5475 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5476 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5477 info->Padding = 0;
5478 rsp->OutputBufferLength = cpu_to_le32(48);
5479 break;
5480 }
5481 case FS_POSIX_INFORMATION:
5482 {
5483 struct filesystem_posix_info *info;
5484
5485 if (!work->tcon->posix_extensions) {
5486 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5487 rc = -EOPNOTSUPP;
5488 } else {
5489 info = (struct filesystem_posix_info *)(rsp->Buffer);
5490 info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5491 info->BlockSize = cpu_to_le32(stfs.f_bsize);
5492 info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5493 info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5494 info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5495 info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5496 info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5497 rsp->OutputBufferLength = cpu_to_le32(56);
5498 }
5499 break;
5500 }
5501 default:
5502 path_put(&path);
5503 return -EOPNOTSUPP;
5504 }
5505 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5506 rsp, work->response_buf);
5507 path_put(&path);
5508 return rc;
5509 }
5510
5511 static int smb2_get_info_sec(struct ksmbd_work *work,
5512 struct smb2_query_info_req *req,
5513 struct smb2_query_info_rsp *rsp)
5514 {
5515 struct ksmbd_file *fp;
5516 struct mnt_idmap *idmap;
5517 struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5518 struct smb_fattr fattr = {{0}};
5519 struct inode *inode;
5520 __u32 secdesclen = 0;
5521 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5522 int addition_info = le32_to_cpu(req->AdditionalInformation);
5523 int rc = 0, ppntsd_size = 0;
5524
5525 if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5526 PROTECTED_DACL_SECINFO |
5527 UNPROTECTED_DACL_SECINFO)) {
5528 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5529 addition_info);
5530
5531 pntsd->revision = cpu_to_le16(1);
5532 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5533 pntsd->osidoffset = 0;
5534 pntsd->gsidoffset = 0;
5535 pntsd->sacloffset = 0;
5536 pntsd->dacloffset = 0;
5537
5538 secdesclen = sizeof(struct smb_ntsd);
5539 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5540
5541 return 0;
5542 }
5543
5544 if (work->next_smb2_rcv_hdr_off) {
5545 if (!has_file_id(req->VolatileFileId)) {
5546 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5547 work->compound_fid);
5548 id = work->compound_fid;
5549 pid = work->compound_pfid;
5550 }
5551 }
5552
5553 if (!has_file_id(id)) {
5554 id = req->VolatileFileId;
5555 pid = req->PersistentFileId;
5556 }
5557
5558 fp = ksmbd_lookup_fd_slow(work, id, pid);
5559 if (!fp)
5560 return -ENOENT;
5561
5562 idmap = file_mnt_idmap(fp->filp);
5563 inode = file_inode(fp->filp);
5564 ksmbd_acls_fattr(&fattr, idmap, inode);
5565
5566 if (test_share_config_flag(work->tcon->share_conf,
5567 KSMBD_SHARE_FLAG_ACL_XATTR))
5568 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap,
5569 fp->filp->f_path.dentry,
5570 &ppntsd);
5571
5572 /* Check if sd buffer size exceeds response buffer size */
5573 if (smb2_resp_buf_len(work, 8) > ppntsd_size)
5574 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size,
5575 addition_info, &secdesclen, &fattr);
5576 posix_acl_release(fattr.cf_acls);
5577 posix_acl_release(fattr.cf_dacls);
5578 kfree(ppntsd);
5579 ksmbd_fd_put(work, fp);
5580 if (rc)
5581 return rc;
5582
5583 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5584 return 0;
5585 }
5586
5587 /**
5588 * smb2_query_info() - handler for smb2 query info command
5589 * @work: smb work containing query info request buffer
5590 *
5591 * Return: 0 on success, otherwise error
5592 */
5593 int smb2_query_info(struct ksmbd_work *work)
5594 {
5595 struct smb2_query_info_req *req;
5596 struct smb2_query_info_rsp *rsp;
5597 int rc = 0;
5598
5599 WORK_BUFFERS(work, req, rsp);
5600
5601 ksmbd_debug(SMB, "GOT query info request\n");
5602
5603 if (ksmbd_override_fsids(work)) {
5604 rc = -ENOMEM;
5605 goto err_out;
5606 }
5607
5608 switch (req->InfoType) {
5609 case SMB2_O_INFO_FILE:
5610 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5611 rc = smb2_get_info_file(work, req, rsp);
5612 break;
5613 case SMB2_O_INFO_FILESYSTEM:
5614 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5615 rc = smb2_get_info_filesystem(work, req, rsp);
5616 break;
5617 case SMB2_O_INFO_SECURITY:
5618 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5619 rc = smb2_get_info_sec(work, req, rsp);
5620 break;
5621 default:
5622 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5623 req->InfoType);
5624 rc = -EOPNOTSUPP;
5625 }
5626 ksmbd_revert_fsids(work);
5627
5628 if (!rc) {
5629 rsp->StructureSize = cpu_to_le16(9);
5630 rsp->OutputBufferOffset = cpu_to_le16(72);
5631 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
5632 offsetof(struct smb2_query_info_rsp, Buffer) +
5633 le32_to_cpu(rsp->OutputBufferLength));
5634 }
5635
5636 err_out:
5637 if (rc < 0) {
5638 if (rc == -EACCES)
5639 rsp->hdr.Status = STATUS_ACCESS_DENIED;
5640 else if (rc == -ENOENT)
5641 rsp->hdr.Status = STATUS_FILE_CLOSED;
5642 else if (rc == -EIO)
5643 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5644 else if (rc == -ENOMEM)
5645 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
5646 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5647 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5648 smb2_set_err_rsp(work);
5649
5650 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5651 rc);
5652 return rc;
5653 }
5654 return 0;
5655 }
5656
5657 /**
5658 * smb2_close_pipe() - handler for closing IPC pipe
5659 * @work: smb work containing close request buffer
5660 *
5661 * Return: 0
5662 */
5663 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5664 {
5665 u64 id;
5666 struct smb2_close_req *req;
5667 struct smb2_close_rsp *rsp;
5668
5669 WORK_BUFFERS(work, req, rsp);
5670
5671 id = req->VolatileFileId;
5672 ksmbd_session_rpc_close(work->sess, id);
5673
5674 rsp->StructureSize = cpu_to_le16(60);
5675 rsp->Flags = 0;
5676 rsp->Reserved = 0;
5677 rsp->CreationTime = 0;
5678 rsp->LastAccessTime = 0;
5679 rsp->LastWriteTime = 0;
5680 rsp->ChangeTime = 0;
5681 rsp->AllocationSize = 0;
5682 rsp->EndOfFile = 0;
5683 rsp->Attributes = 0;
5684
5685 return ksmbd_iov_pin_rsp(work, (void *)rsp,
5686 sizeof(struct smb2_close_rsp));
5687 }
5688
5689 /**
5690 * smb2_close() - handler for smb2 close file command
5691 * @work: smb work containing close request buffer
5692 *
5693 * Return: 0
5694 */
5695 int smb2_close(struct ksmbd_work *work)
5696 {
5697 u64 volatile_id = KSMBD_NO_FID;
5698 u64 sess_id;
5699 struct smb2_close_req *req;
5700 struct smb2_close_rsp *rsp;
5701 struct ksmbd_conn *conn = work->conn;
5702 struct ksmbd_file *fp;
5703 u64 time;
5704 int err = 0;
5705
5706 WORK_BUFFERS(work, req, rsp);
5707
5708 if (test_share_config_flag(work->tcon->share_conf,
5709 KSMBD_SHARE_FLAG_PIPE)) {
5710 ksmbd_debug(SMB, "IPC pipe close request\n");
5711 return smb2_close_pipe(work);
5712 }
5713
5714 sess_id = le64_to_cpu(req->hdr.SessionId);
5715 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5716 sess_id = work->compound_sid;
5717
5718 work->compound_sid = 0;
5719 if (check_session_id(conn, sess_id)) {
5720 work->compound_sid = sess_id;
5721 } else {
5722 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5723 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5724 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5725 err = -EBADF;
5726 goto out;
5727 }
5728
5729 if (work->next_smb2_rcv_hdr_off &&
5730 !has_file_id(req->VolatileFileId)) {
5731 if (!has_file_id(work->compound_fid)) {
5732 /* file already closed, return FILE_CLOSED */
5733 ksmbd_debug(SMB, "file already closed\n");
5734 rsp->hdr.Status = STATUS_FILE_CLOSED;
5735 err = -EBADF;
5736 goto out;
5737 } else {
5738 ksmbd_debug(SMB,
5739 "Compound request set FID = %llu:%llu\n",
5740 work->compound_fid,
5741 work->compound_pfid);
5742 volatile_id = work->compound_fid;
5743
5744 /* file closed, stored id is not valid anymore */
5745 work->compound_fid = KSMBD_NO_FID;
5746 work->compound_pfid = KSMBD_NO_FID;
5747 }
5748 } else {
5749 volatile_id = req->VolatileFileId;
5750 }
5751 ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5752
5753 rsp->StructureSize = cpu_to_le16(60);
5754 rsp->Reserved = 0;
5755
5756 if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5757 struct kstat stat;
5758 int ret;
5759
5760 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5761 if (!fp) {
5762 err = -ENOENT;
5763 goto out;
5764 }
5765
5766 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5767 AT_STATX_SYNC_AS_STAT);
5768 if (ret) {
5769 ksmbd_fd_put(work, fp);
5770 goto out;
5771 }
5772
5773 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5774 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
5775 cpu_to_le64(stat.blocks << 9);
5776 rsp->EndOfFile = cpu_to_le64(stat.size);
5777 rsp->Attributes = fp->f_ci->m_fattr;
5778 rsp->CreationTime = cpu_to_le64(fp->create_time);
5779 time = ksmbd_UnixTimeToNT(stat.atime);
5780 rsp->LastAccessTime = cpu_to_le64(time);
5781 time = ksmbd_UnixTimeToNT(stat.mtime);
5782 rsp->LastWriteTime = cpu_to_le64(time);
5783 time = ksmbd_UnixTimeToNT(stat.ctime);
5784 rsp->ChangeTime = cpu_to_le64(time);
5785 ksmbd_fd_put(work, fp);
5786 } else {
5787 rsp->Flags = 0;
5788 rsp->AllocationSize = 0;
5789 rsp->EndOfFile = 0;
5790 rsp->Attributes = 0;
5791 rsp->CreationTime = 0;
5792 rsp->LastAccessTime = 0;
5793 rsp->LastWriteTime = 0;
5794 rsp->ChangeTime = 0;
5795 }
5796
5797 err = ksmbd_close_fd(work, volatile_id);
5798 out:
5799 if (!err)
5800 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
5801 sizeof(struct smb2_close_rsp));
5802
5803 if (err) {
5804 if (rsp->hdr.Status == 0)
5805 rsp->hdr.Status = STATUS_FILE_CLOSED;
5806 smb2_set_err_rsp(work);
5807 }
5808
5809 return err;
5810 }
5811
5812 /**
5813 * smb2_echo() - handler for smb2 echo(ping) command
5814 * @work: smb work containing echo request buffer
5815 *
5816 * Return: 0
5817 */
5818 int smb2_echo(struct ksmbd_work *work)
5819 {
5820 struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5821
5822 if (work->next_smb2_rcv_hdr_off)
5823 rsp = ksmbd_resp_buf_next(work);
5824
5825 rsp->StructureSize = cpu_to_le16(4);
5826 rsp->Reserved = 0;
5827 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp));
5828 }
5829
5830 static int smb2_rename(struct ksmbd_work *work,
5831 struct ksmbd_file *fp,
5832 struct smb2_file_rename_info *file_info,
5833 struct nls_table *local_nls)
5834 {
5835 struct ksmbd_share_config *share = fp->tcon->share_conf;
5836 char *new_name = NULL;
5837 int rc, flags = 0;
5838
5839 ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5840 new_name = smb2_get_name(file_info->FileName,
5841 le32_to_cpu(file_info->FileNameLength),
5842 local_nls);
5843 if (IS_ERR(new_name))
5844 return PTR_ERR(new_name);
5845
5846 if (strchr(new_name, ':')) {
5847 int s_type;
5848 char *xattr_stream_name, *stream_name = NULL;
5849 size_t xattr_stream_size;
5850 int len;
5851
5852 rc = parse_stream_name(new_name, &stream_name, &s_type);
5853 if (rc < 0)
5854 goto out;
5855
5856 len = strlen(new_name);
5857 if (len > 0 && new_name[len - 1] != '/') {
5858 pr_err("not allow base filename in rename\n");
5859 rc = -ESHARE;
5860 goto out;
5861 }
5862
5863 rc = ksmbd_vfs_xattr_stream_name(stream_name,
5864 &xattr_stream_name,
5865 &xattr_stream_size,
5866 s_type);
5867 if (rc)
5868 goto out;
5869
5870 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp),
5871 &fp->filp->f_path,
5872 xattr_stream_name,
5873 NULL, 0, 0, true);
5874 if (rc < 0) {
5875 pr_err("failed to store stream name in xattr: %d\n",
5876 rc);
5877 rc = -EINVAL;
5878 goto out;
5879 }
5880
5881 goto out;
5882 }
5883
5884 ksmbd_debug(SMB, "new name %s\n", new_name);
5885 if (ksmbd_share_veto_filename(share, new_name)) {
5886 rc = -ENOENT;
5887 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5888 goto out;
5889 }
5890
5891 if (!file_info->ReplaceIfExists)
5892 flags = RENAME_NOREPLACE;
5893
5894 rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags);
5895 if (!rc)
5896 smb_break_all_levII_oplock(work, fp, 0);
5897 out:
5898 kfree(new_name);
5899 return rc;
5900 }
5901
5902 static int smb2_create_link(struct ksmbd_work *work,
5903 struct ksmbd_share_config *share,
5904 struct smb2_file_link_info *file_info,
5905 unsigned int buf_len, struct file *filp,
5906 struct nls_table *local_nls)
5907 {
5908 char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5909 struct path path, parent_path;
5910 bool file_present = false;
5911 int rc;
5912
5913 if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5914 le32_to_cpu(file_info->FileNameLength))
5915 return -EINVAL;
5916
5917 ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5918 pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5919 if (!pathname)
5920 return -ENOMEM;
5921
5922 link_name = smb2_get_name(file_info->FileName,
5923 le32_to_cpu(file_info->FileNameLength),
5924 local_nls);
5925 if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5926 rc = -EINVAL;
5927 goto out;
5928 }
5929
5930 ksmbd_debug(SMB, "link name is %s\n", link_name);
5931 target_name = file_path(filp, pathname, PATH_MAX);
5932 if (IS_ERR(target_name)) {
5933 rc = -EINVAL;
5934 goto out;
5935 }
5936
5937 ksmbd_debug(SMB, "target name is %s\n", target_name);
5938 rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS,
5939 &parent_path, &path, 0);
5940 if (rc) {
5941 if (rc != -ENOENT)
5942 goto out;
5943 } else
5944 file_present = true;
5945
5946 if (file_info->ReplaceIfExists) {
5947 if (file_present) {
5948 rc = ksmbd_vfs_remove_file(work, &path);
5949 if (rc) {
5950 rc = -EINVAL;
5951 ksmbd_debug(SMB, "cannot delete %s\n",
5952 link_name);
5953 goto out;
5954 }
5955 }
5956 } else {
5957 if (file_present) {
5958 rc = -EEXIST;
5959 ksmbd_debug(SMB, "link already exists\n");
5960 goto out;
5961 }
5962 }
5963
5964 rc = ksmbd_vfs_link(work, target_name, link_name);
5965 if (rc)
5966 rc = -EINVAL;
5967 out:
5968 if (file_present)
5969 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
5970
5971 if (!IS_ERR(link_name))
5972 kfree(link_name);
5973 kfree(pathname);
5974 return rc;
5975 }
5976
5977 static int set_file_basic_info(struct ksmbd_file *fp,
5978 struct smb2_file_basic_info *file_info,
5979 struct ksmbd_share_config *share)
5980 {
5981 struct iattr attrs;
5982 struct file *filp;
5983 struct inode *inode;
5984 struct mnt_idmap *idmap;
5985 int rc = 0;
5986
5987 if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5988 return -EACCES;
5989
5990 attrs.ia_valid = 0;
5991 filp = fp->filp;
5992 inode = file_inode(filp);
5993 idmap = file_mnt_idmap(filp);
5994
5995 if (file_info->CreationTime)
5996 fp->create_time = le64_to_cpu(file_info->CreationTime);
5997
5998 if (file_info->LastAccessTime) {
5999 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
6000 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
6001 }
6002
6003 attrs.ia_valid |= ATTR_CTIME;
6004 if (file_info->ChangeTime)
6005 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
6006 else
6007 attrs.ia_ctime = inode_get_ctime(inode);
6008
6009 if (file_info->LastWriteTime) {
6010 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
6011 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
6012 }
6013
6014 if (file_info->Attributes) {
6015 if (!S_ISDIR(inode->i_mode) &&
6016 file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
6017 pr_err("can't change a file to a directory\n");
6018 return -EINVAL;
6019 }
6020
6021 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
6022 fp->f_ci->m_fattr = file_info->Attributes |
6023 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
6024 }
6025
6026 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
6027 (file_info->CreationTime || file_info->Attributes)) {
6028 struct xattr_dos_attrib da = {0};
6029
6030 da.version = 4;
6031 da.itime = fp->itime;
6032 da.create_time = fp->create_time;
6033 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
6034 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
6035 XATTR_DOSINFO_ITIME;
6036
6037 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da,
6038 true);
6039 if (rc)
6040 ksmbd_debug(SMB,
6041 "failed to restore file attribute in EA\n");
6042 rc = 0;
6043 }
6044
6045 if (attrs.ia_valid) {
6046 struct dentry *dentry = filp->f_path.dentry;
6047 struct inode *inode = d_inode(dentry);
6048
6049 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
6050 return -EACCES;
6051
6052 inode_lock(inode);
6053 inode_set_ctime_to_ts(inode, attrs.ia_ctime);
6054 attrs.ia_valid &= ~ATTR_CTIME;
6055 rc = notify_change(idmap, dentry, &attrs, NULL);
6056 inode_unlock(inode);
6057 }
6058 return rc;
6059 }
6060
6061 static int set_file_allocation_info(struct ksmbd_work *work,
6062 struct ksmbd_file *fp,
6063 struct smb2_file_alloc_info *file_alloc_info)
6064 {
6065 /*
6066 * TODO : It's working fine only when store dos attributes
6067 * is not yes. need to implement a logic which works
6068 * properly with any smb.conf option
6069 */
6070
6071 loff_t alloc_blks;
6072 struct inode *inode;
6073 struct kstat stat;
6074 int rc;
6075
6076 if (!(fp->daccess & FILE_WRITE_DATA_LE))
6077 return -EACCES;
6078
6079 rc = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
6080 AT_STATX_SYNC_AS_STAT);
6081 if (rc)
6082 return rc;
6083
6084 alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
6085 inode = file_inode(fp->filp);
6086
6087 if (alloc_blks > stat.blocks) {
6088 smb_break_all_levII_oplock(work, fp, 1);
6089 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
6090 alloc_blks * 512);
6091 if (rc && rc != -EOPNOTSUPP) {
6092 pr_err("vfs_fallocate is failed : %d\n", rc);
6093 return rc;
6094 }
6095 } else if (alloc_blks < stat.blocks) {
6096 loff_t size;
6097
6098 /*
6099 * Allocation size could be smaller than original one
6100 * which means allocated blocks in file should be
6101 * deallocated. use truncate to cut out it, but inode
6102 * size is also updated with truncate offset.
6103 * inode size is retained by backup inode size.
6104 */
6105 size = i_size_read(inode);
6106 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
6107 if (rc) {
6108 pr_err("truncate failed!, err %d\n", rc);
6109 return rc;
6110 }
6111 if (size < alloc_blks * 512)
6112 i_size_write(inode, size);
6113 }
6114 return 0;
6115 }
6116
6117 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
6118 struct smb2_file_eof_info *file_eof_info)
6119 {
6120 loff_t newsize;
6121 struct inode *inode;
6122 int rc;
6123
6124 if (!(fp->daccess & FILE_WRITE_DATA_LE))
6125 return -EACCES;
6126
6127 newsize = le64_to_cpu(file_eof_info->EndOfFile);
6128 inode = file_inode(fp->filp);
6129
6130 /*
6131 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
6132 * on FAT32 shared device, truncate execution time is too long
6133 * and network error could cause from windows client. because
6134 * truncate of some filesystem like FAT32 fill zero data in
6135 * truncated range.
6136 */
6137 if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
6138 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
6139 rc = ksmbd_vfs_truncate(work, fp, newsize);
6140 if (rc) {
6141 ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
6142 if (rc != -EAGAIN)
6143 rc = -EBADF;
6144 return rc;
6145 }
6146 }
6147 return 0;
6148 }
6149
6150 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
6151 struct smb2_file_rename_info *rename_info,
6152 unsigned int buf_len)
6153 {
6154 if (!(fp->daccess & FILE_DELETE_LE)) {
6155 pr_err("no right to delete : 0x%x\n", fp->daccess);
6156 return -EACCES;
6157 }
6158
6159 if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
6160 le32_to_cpu(rename_info->FileNameLength))
6161 return -EINVAL;
6162
6163 if (!le32_to_cpu(rename_info->FileNameLength))
6164 return -EINVAL;
6165
6166 return smb2_rename(work, fp, rename_info, work->conn->local_nls);
6167 }
6168
6169 static int set_file_disposition_info(struct ksmbd_file *fp,
6170 struct smb2_file_disposition_info *file_info)
6171 {
6172 struct inode *inode;
6173
6174 if (!(fp->daccess & FILE_DELETE_LE)) {
6175 pr_err("no right to delete : 0x%x\n", fp->daccess);
6176 return -EACCES;
6177 }
6178
6179 inode = file_inode(fp->filp);
6180 if (file_info->DeletePending) {
6181 if (S_ISDIR(inode->i_mode) &&
6182 ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
6183 return -EBUSY;
6184 ksmbd_set_inode_pending_delete(fp);
6185 } else {
6186 ksmbd_clear_inode_pending_delete(fp);
6187 }
6188 return 0;
6189 }
6190
6191 static int set_file_position_info(struct ksmbd_file *fp,
6192 struct smb2_file_pos_info *file_info)
6193 {
6194 loff_t current_byte_offset;
6195 unsigned long sector_size;
6196 struct inode *inode;
6197
6198 inode = file_inode(fp->filp);
6199 current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
6200 sector_size = inode->i_sb->s_blocksize;
6201
6202 if (current_byte_offset < 0 ||
6203 (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
6204 current_byte_offset & (sector_size - 1))) {
6205 pr_err("CurrentByteOffset is not valid : %llu\n",
6206 current_byte_offset);
6207 return -EINVAL;
6208 }
6209
6210 fp->filp->f_pos = current_byte_offset;
6211 return 0;
6212 }
6213
6214 static int set_file_mode_info(struct ksmbd_file *fp,
6215 struct smb2_file_mode_info *file_info)
6216 {
6217 __le32 mode;
6218
6219 mode = file_info->Mode;
6220
6221 if ((mode & ~FILE_MODE_INFO_MASK)) {
6222 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
6223 return -EINVAL;
6224 }
6225
6226 /*
6227 * TODO : need to implement consideration for
6228 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
6229 */
6230 ksmbd_vfs_set_fadvise(fp->filp, mode);
6231 fp->coption = mode;
6232 return 0;
6233 }
6234
6235 /**
6236 * smb2_set_info_file() - handler for smb2 set info command
6237 * @work: smb work containing set info command buffer
6238 * @fp: ksmbd_file pointer
6239 * @req: request buffer pointer
6240 * @share: ksmbd_share_config pointer
6241 *
6242 * Return: 0 on success, otherwise error
6243 * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
6244 */
6245 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
6246 struct smb2_set_info_req *req,
6247 struct ksmbd_share_config *share)
6248 {
6249 unsigned int buf_len = le32_to_cpu(req->BufferLength);
6250 char *buffer = (char *)req + le16_to_cpu(req->BufferOffset);
6251
6252 switch (req->FileInfoClass) {
6253 case FILE_BASIC_INFORMATION:
6254 {
6255 if (buf_len < sizeof(struct smb2_file_basic_info))
6256 return -EINVAL;
6257
6258 return set_file_basic_info(fp, (struct smb2_file_basic_info *)buffer, share);
6259 }
6260 case FILE_ALLOCATION_INFORMATION:
6261 {
6262 if (buf_len < sizeof(struct smb2_file_alloc_info))
6263 return -EINVAL;
6264
6265 return set_file_allocation_info(work, fp,
6266 (struct smb2_file_alloc_info *)buffer);
6267 }
6268 case FILE_END_OF_FILE_INFORMATION:
6269 {
6270 if (buf_len < sizeof(struct smb2_file_eof_info))
6271 return -EINVAL;
6272
6273 return set_end_of_file_info(work, fp,
6274 (struct smb2_file_eof_info *)buffer);
6275 }
6276 case FILE_RENAME_INFORMATION:
6277 {
6278 if (buf_len < sizeof(struct smb2_file_rename_info))
6279 return -EINVAL;
6280
6281 return set_rename_info(work, fp,
6282 (struct smb2_file_rename_info *)buffer,
6283 buf_len);
6284 }
6285 case FILE_LINK_INFORMATION:
6286 {
6287 if (buf_len < sizeof(struct smb2_file_link_info))
6288 return -EINVAL;
6289
6290 return smb2_create_link(work, work->tcon->share_conf,
6291 (struct smb2_file_link_info *)buffer,
6292 buf_len, fp->filp,
6293 work->conn->local_nls);
6294 }
6295 case FILE_DISPOSITION_INFORMATION:
6296 {
6297 if (buf_len < sizeof(struct smb2_file_disposition_info))
6298 return -EINVAL;
6299
6300 return set_file_disposition_info(fp,
6301 (struct smb2_file_disposition_info *)buffer);
6302 }
6303 case FILE_FULL_EA_INFORMATION:
6304 {
6305 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
6306 pr_err("Not permitted to write ext attr: 0x%x\n",
6307 fp->daccess);
6308 return -EACCES;
6309 }
6310
6311 if (buf_len < sizeof(struct smb2_ea_info))
6312 return -EINVAL;
6313
6314 return smb2_set_ea((struct smb2_ea_info *)buffer,
6315 buf_len, &fp->filp->f_path, true);
6316 }
6317 case FILE_POSITION_INFORMATION:
6318 {
6319 if (buf_len < sizeof(struct smb2_file_pos_info))
6320 return -EINVAL;
6321
6322 return set_file_position_info(fp, (struct smb2_file_pos_info *)buffer);
6323 }
6324 case FILE_MODE_INFORMATION:
6325 {
6326 if (buf_len < sizeof(struct smb2_file_mode_info))
6327 return -EINVAL;
6328
6329 return set_file_mode_info(fp, (struct smb2_file_mode_info *)buffer);
6330 }
6331 }
6332
6333 pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
6334 return -EOPNOTSUPP;
6335 }
6336
6337 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
6338 char *buffer, int buf_len)
6339 {
6340 struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
6341
6342 fp->saccess |= FILE_SHARE_DELETE_LE;
6343
6344 return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
6345 buf_len, false, true);
6346 }
6347
6348 /**
6349 * smb2_set_info() - handler for smb2 set info command handler
6350 * @work: smb work containing set info request buffer
6351 *
6352 * Return: 0 on success, otherwise error
6353 */
6354 int smb2_set_info(struct ksmbd_work *work)
6355 {
6356 struct smb2_set_info_req *req;
6357 struct smb2_set_info_rsp *rsp;
6358 struct ksmbd_file *fp = NULL;
6359 int rc = 0;
6360 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6361
6362 ksmbd_debug(SMB, "Received set info request\n");
6363
6364 if (work->next_smb2_rcv_hdr_off) {
6365 req = ksmbd_req_buf_next(work);
6366 rsp = ksmbd_resp_buf_next(work);
6367 if (!has_file_id(req->VolatileFileId)) {
6368 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6369 work->compound_fid);
6370 id = work->compound_fid;
6371 pid = work->compound_pfid;
6372 }
6373 } else {
6374 req = smb2_get_msg(work->request_buf);
6375 rsp = smb2_get_msg(work->response_buf);
6376 }
6377
6378 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6379 ksmbd_debug(SMB, "User does not have write permission\n");
6380 pr_err("User does not have write permission\n");
6381 rc = -EACCES;
6382 goto err_out;
6383 }
6384
6385 if (!has_file_id(id)) {
6386 id = req->VolatileFileId;
6387 pid = req->PersistentFileId;
6388 }
6389
6390 fp = ksmbd_lookup_fd_slow(work, id, pid);
6391 if (!fp) {
6392 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6393 rc = -ENOENT;
6394 goto err_out;
6395 }
6396
6397 switch (req->InfoType) {
6398 case SMB2_O_INFO_FILE:
6399 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6400 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6401 break;
6402 case SMB2_O_INFO_SECURITY:
6403 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6404 if (ksmbd_override_fsids(work)) {
6405 rc = -ENOMEM;
6406 goto err_out;
6407 }
6408 rc = smb2_set_info_sec(fp,
6409 le32_to_cpu(req->AdditionalInformation),
6410 (char *)req + le16_to_cpu(req->BufferOffset),
6411 le32_to_cpu(req->BufferLength));
6412 ksmbd_revert_fsids(work);
6413 break;
6414 default:
6415 rc = -EOPNOTSUPP;
6416 }
6417
6418 if (rc < 0)
6419 goto err_out;
6420
6421 rsp->StructureSize = cpu_to_le16(2);
6422 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
6423 sizeof(struct smb2_set_info_rsp));
6424 if (rc)
6425 goto err_out;
6426 ksmbd_fd_put(work, fp);
6427 return 0;
6428
6429 err_out:
6430 if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6431 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6432 else if (rc == -EINVAL)
6433 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6434 else if (rc == -ESHARE)
6435 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6436 else if (rc == -ENOENT)
6437 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6438 else if (rc == -EBUSY || rc == -ENOTEMPTY)
6439 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6440 else if (rc == -EAGAIN)
6441 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6442 else if (rc == -EBADF || rc == -ESTALE)
6443 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6444 else if (rc == -EEXIST)
6445 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6446 else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6447 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6448 smb2_set_err_rsp(work);
6449 ksmbd_fd_put(work, fp);
6450 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6451 return rc;
6452 }
6453
6454 /**
6455 * smb2_read_pipe() - handler for smb2 read from IPC pipe
6456 * @work: smb work containing read IPC pipe command buffer
6457 *
6458 * Return: 0 on success, otherwise error
6459 */
6460 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6461 {
6462 int nbytes = 0, err;
6463 u64 id;
6464 struct ksmbd_rpc_command *rpc_resp;
6465 struct smb2_read_req *req;
6466 struct smb2_read_rsp *rsp;
6467
6468 WORK_BUFFERS(work, req, rsp);
6469
6470 id = req->VolatileFileId;
6471
6472 rpc_resp = ksmbd_rpc_read(work->sess, id);
6473 if (rpc_resp) {
6474 void *aux_payload_buf;
6475
6476 if (rpc_resp->flags != KSMBD_RPC_OK) {
6477 err = -EINVAL;
6478 goto out;
6479 }
6480
6481 aux_payload_buf =
6482 kvmalloc(rpc_resp->payload_sz, GFP_KERNEL);
6483 if (!aux_payload_buf) {
6484 err = -ENOMEM;
6485 goto out;
6486 }
6487
6488 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz);
6489
6490 nbytes = rpc_resp->payload_sz;
6491 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6492 offsetof(struct smb2_read_rsp, Buffer),
6493 aux_payload_buf, nbytes);
6494 if (err) {
6495 kvfree(aux_payload_buf);
6496 goto out;
6497 }
6498 kvfree(rpc_resp);
6499 } else {
6500 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6501 offsetof(struct smb2_read_rsp, Buffer));
6502 if (err)
6503 goto out;
6504 }
6505
6506 rsp->StructureSize = cpu_to_le16(17);
6507 rsp->DataOffset = 80;
6508 rsp->Reserved = 0;
6509 rsp->DataLength = cpu_to_le32(nbytes);
6510 rsp->DataRemaining = 0;
6511 rsp->Flags = 0;
6512 return 0;
6513
6514 out:
6515 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6516 smb2_set_err_rsp(work);
6517 kvfree(rpc_resp);
6518 return err;
6519 }
6520
6521 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6522 struct smb2_buffer_desc_v1 *desc,
6523 __le32 Channel,
6524 __le16 ChannelInfoLength)
6525 {
6526 unsigned int i, ch_count;
6527
6528 if (work->conn->dialect == SMB30_PROT_ID &&
6529 Channel != SMB2_CHANNEL_RDMA_V1)
6530 return -EINVAL;
6531
6532 ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6533 if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6534 for (i = 0; i < ch_count; i++) {
6535 pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6536 i,
6537 le32_to_cpu(desc[i].token),
6538 le32_to_cpu(desc[i].length));
6539 }
6540 }
6541 if (!ch_count)
6542 return -EINVAL;
6543
6544 work->need_invalidate_rkey =
6545 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6546 if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
6547 work->remote_key = le32_to_cpu(desc->token);
6548 return 0;
6549 }
6550
6551 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6552 struct smb2_read_req *req, void *data_buf,
6553 size_t length)
6554 {
6555 int err;
6556
6557 err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6558 (struct smb2_buffer_desc_v1 *)
6559 ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
6560 le16_to_cpu(req->ReadChannelInfoLength));
6561 if (err)
6562 return err;
6563
6564 return length;
6565 }
6566
6567 /**
6568 * smb2_read() - handler for smb2 read from file
6569 * @work: smb work containing read command buffer
6570 *
6571 * Return: 0 on success, otherwise error
6572 */
6573 int smb2_read(struct ksmbd_work *work)
6574 {
6575 struct ksmbd_conn *conn = work->conn;
6576 struct smb2_read_req *req;
6577 struct smb2_read_rsp *rsp;
6578 struct ksmbd_file *fp = NULL;
6579 loff_t offset;
6580 size_t length, mincount;
6581 ssize_t nbytes = 0, remain_bytes = 0;
6582 int err = 0;
6583 bool is_rdma_channel = false;
6584 unsigned int max_read_size = conn->vals->max_read_size;
6585 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6586 void *aux_payload_buf;
6587
6588 if (test_share_config_flag(work->tcon->share_conf,
6589 KSMBD_SHARE_FLAG_PIPE)) {
6590 ksmbd_debug(SMB, "IPC pipe read request\n");
6591 return smb2_read_pipe(work);
6592 }
6593
6594 if (work->next_smb2_rcv_hdr_off) {
6595 req = ksmbd_req_buf_next(work);
6596 rsp = ksmbd_resp_buf_next(work);
6597 if (!has_file_id(req->VolatileFileId)) {
6598 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6599 work->compound_fid);
6600 id = work->compound_fid;
6601 pid = work->compound_pfid;
6602 }
6603 } else {
6604 req = smb2_get_msg(work->request_buf);
6605 rsp = smb2_get_msg(work->response_buf);
6606 }
6607
6608 if (!has_file_id(id)) {
6609 id = req->VolatileFileId;
6610 pid = req->PersistentFileId;
6611 }
6612
6613 if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6614 req->Channel == SMB2_CHANNEL_RDMA_V1) {
6615 is_rdma_channel = true;
6616 max_read_size = get_smbd_max_read_write_size();
6617 }
6618
6619 if (is_rdma_channel == true) {
6620 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6621
6622 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6623 err = -EINVAL;
6624 goto out;
6625 }
6626 err = smb2_set_remote_key_for_rdma(work,
6627 (struct smb2_buffer_desc_v1 *)
6628 ((char *)req + ch_offset),
6629 req->Channel,
6630 req->ReadChannelInfoLength);
6631 if (err)
6632 goto out;
6633 }
6634
6635 fp = ksmbd_lookup_fd_slow(work, id, pid);
6636 if (!fp) {
6637 err = -ENOENT;
6638 goto out;
6639 }
6640
6641 if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6642 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6643 err = -EACCES;
6644 goto out;
6645 }
6646
6647 offset = le64_to_cpu(req->Offset);
6648 length = le32_to_cpu(req->Length);
6649 mincount = le32_to_cpu(req->MinimumCount);
6650
6651 if (length > max_read_size) {
6652 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6653 max_read_size);
6654 err = -EINVAL;
6655 goto out;
6656 }
6657
6658 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6659 fp->filp, offset, length);
6660
6661 aux_payload_buf = kvzalloc(length, GFP_KERNEL);
6662 if (!aux_payload_buf) {
6663 err = -ENOMEM;
6664 goto out;
6665 }
6666
6667 nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf);
6668 if (nbytes < 0) {
6669 err = nbytes;
6670 goto out;
6671 }
6672
6673 if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6674 kvfree(aux_payload_buf);
6675 rsp->hdr.Status = STATUS_END_OF_FILE;
6676 smb2_set_err_rsp(work);
6677 ksmbd_fd_put(work, fp);
6678 return 0;
6679 }
6680
6681 ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6682 nbytes, offset, mincount);
6683
6684 if (is_rdma_channel == true) {
6685 /* write data to the client using rdma channel */
6686 remain_bytes = smb2_read_rdma_channel(work, req,
6687 aux_payload_buf,
6688 nbytes);
6689 kvfree(aux_payload_buf);
6690 aux_payload_buf = NULL;
6691 nbytes = 0;
6692 if (remain_bytes < 0) {
6693 err = (int)remain_bytes;
6694 goto out;
6695 }
6696 }
6697
6698 rsp->StructureSize = cpu_to_le16(17);
6699 rsp->DataOffset = 80;
6700 rsp->Reserved = 0;
6701 rsp->DataLength = cpu_to_le32(nbytes);
6702 rsp->DataRemaining = cpu_to_le32(remain_bytes);
6703 rsp->Flags = 0;
6704 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6705 offsetof(struct smb2_read_rsp, Buffer),
6706 aux_payload_buf, nbytes);
6707 if (err) {
6708 kvfree(aux_payload_buf);
6709 goto out;
6710 }
6711 ksmbd_fd_put(work, fp);
6712 return 0;
6713
6714 out:
6715 if (err) {
6716 if (err == -EISDIR)
6717 rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6718 else if (err == -EAGAIN)
6719 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6720 else if (err == -ENOENT)
6721 rsp->hdr.Status = STATUS_FILE_CLOSED;
6722 else if (err == -EACCES)
6723 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6724 else if (err == -ESHARE)
6725 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6726 else if (err == -EINVAL)
6727 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6728 else
6729 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6730
6731 smb2_set_err_rsp(work);
6732 }
6733 ksmbd_fd_put(work, fp);
6734 return err;
6735 }
6736
6737 /**
6738 * smb2_write_pipe() - handler for smb2 write on IPC pipe
6739 * @work: smb work containing write IPC pipe command buffer
6740 *
6741 * Return: 0 on success, otherwise error
6742 */
6743 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6744 {
6745 struct smb2_write_req *req;
6746 struct smb2_write_rsp *rsp;
6747 struct ksmbd_rpc_command *rpc_resp;
6748 u64 id = 0;
6749 int err = 0, ret = 0;
6750 char *data_buf;
6751 size_t length;
6752
6753 WORK_BUFFERS(work, req, rsp);
6754
6755 length = le32_to_cpu(req->Length);
6756 id = req->VolatileFileId;
6757
6758 if ((u64)le16_to_cpu(req->DataOffset) + length >
6759 get_rfc1002_len(work->request_buf)) {
6760 pr_err("invalid write data offset %u, smb_len %u\n",
6761 le16_to_cpu(req->DataOffset),
6762 get_rfc1002_len(work->request_buf));
6763 err = -EINVAL;
6764 goto out;
6765 }
6766
6767 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6768 le16_to_cpu(req->DataOffset));
6769
6770 rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6771 if (rpc_resp) {
6772 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6773 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6774 kvfree(rpc_resp);
6775 smb2_set_err_rsp(work);
6776 return -EOPNOTSUPP;
6777 }
6778 if (rpc_resp->flags != KSMBD_RPC_OK) {
6779 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6780 smb2_set_err_rsp(work);
6781 kvfree(rpc_resp);
6782 return ret;
6783 }
6784 kvfree(rpc_resp);
6785 }
6786
6787 rsp->StructureSize = cpu_to_le16(17);
6788 rsp->DataOffset = 0;
6789 rsp->Reserved = 0;
6790 rsp->DataLength = cpu_to_le32(length);
6791 rsp->DataRemaining = 0;
6792 rsp->Reserved2 = 0;
6793 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6794 offsetof(struct smb2_write_rsp, Buffer));
6795 out:
6796 if (err) {
6797 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6798 smb2_set_err_rsp(work);
6799 }
6800
6801 return err;
6802 }
6803
6804 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6805 struct smb2_write_req *req,
6806 struct ksmbd_file *fp,
6807 loff_t offset, size_t length, bool sync)
6808 {
6809 char *data_buf;
6810 int ret;
6811 ssize_t nbytes;
6812
6813 data_buf = kvzalloc(length, GFP_KERNEL);
6814 if (!data_buf)
6815 return -ENOMEM;
6816
6817 ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6818 (struct smb2_buffer_desc_v1 *)
6819 ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
6820 le16_to_cpu(req->WriteChannelInfoLength));
6821 if (ret < 0) {
6822 kvfree(data_buf);
6823 return ret;
6824 }
6825
6826 ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6827 kvfree(data_buf);
6828 if (ret < 0)
6829 return ret;
6830
6831 return nbytes;
6832 }
6833
6834 /**
6835 * smb2_write() - handler for smb2 write from file
6836 * @work: smb work containing write command buffer
6837 *
6838 * Return: 0 on success, otherwise error
6839 */
6840 int smb2_write(struct ksmbd_work *work)
6841 {
6842 struct smb2_write_req *req;
6843 struct smb2_write_rsp *rsp;
6844 struct ksmbd_file *fp = NULL;
6845 loff_t offset;
6846 size_t length;
6847 ssize_t nbytes;
6848 char *data_buf;
6849 bool writethrough = false, is_rdma_channel = false;
6850 int err = 0;
6851 unsigned int max_write_size = work->conn->vals->max_write_size;
6852
6853 WORK_BUFFERS(work, req, rsp);
6854
6855 if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6856 ksmbd_debug(SMB, "IPC pipe write request\n");
6857 return smb2_write_pipe(work);
6858 }
6859
6860 offset = le64_to_cpu(req->Offset);
6861 length = le32_to_cpu(req->Length);
6862
6863 if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
6864 req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6865 is_rdma_channel = true;
6866 max_write_size = get_smbd_max_read_write_size();
6867 length = le32_to_cpu(req->RemainingBytes);
6868 }
6869
6870 if (is_rdma_channel == true) {
6871 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
6872
6873 if (req->Length != 0 || req->DataOffset != 0 ||
6874 ch_offset < offsetof(struct smb2_write_req, Buffer)) {
6875 err = -EINVAL;
6876 goto out;
6877 }
6878 err = smb2_set_remote_key_for_rdma(work,
6879 (struct smb2_buffer_desc_v1 *)
6880 ((char *)req + ch_offset),
6881 req->Channel,
6882 req->WriteChannelInfoLength);
6883 if (err)
6884 goto out;
6885 }
6886
6887 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6888 ksmbd_debug(SMB, "User does not have write permission\n");
6889 err = -EACCES;
6890 goto out;
6891 }
6892
6893 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6894 if (!fp) {
6895 err = -ENOENT;
6896 goto out;
6897 }
6898
6899 if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6900 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6901 err = -EACCES;
6902 goto out;
6903 }
6904
6905 if (length > max_write_size) {
6906 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6907 max_write_size);
6908 err = -EINVAL;
6909 goto out;
6910 }
6911
6912 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6913 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6914 writethrough = true;
6915
6916 if (is_rdma_channel == false) {
6917 if (le16_to_cpu(req->DataOffset) <
6918 offsetof(struct smb2_write_req, Buffer)) {
6919 err = -EINVAL;
6920 goto out;
6921 }
6922
6923 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6924 le16_to_cpu(req->DataOffset));
6925
6926 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6927 fp->filp, offset, length);
6928 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6929 writethrough, &nbytes);
6930 if (err < 0)
6931 goto out;
6932 } else {
6933 /* read data from the client using rdma channel, and
6934 * write the data.
6935 */
6936 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
6937 writethrough);
6938 if (nbytes < 0) {
6939 err = (int)nbytes;
6940 goto out;
6941 }
6942 }
6943
6944 rsp->StructureSize = cpu_to_le16(17);
6945 rsp->DataOffset = 0;
6946 rsp->Reserved = 0;
6947 rsp->DataLength = cpu_to_le32(nbytes);
6948 rsp->DataRemaining = 0;
6949 rsp->Reserved2 = 0;
6950 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer));
6951 if (err)
6952 goto out;
6953 ksmbd_fd_put(work, fp);
6954 return 0;
6955
6956 out:
6957 if (err == -EAGAIN)
6958 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6959 else if (err == -ENOSPC || err == -EFBIG)
6960 rsp->hdr.Status = STATUS_DISK_FULL;
6961 else if (err == -ENOENT)
6962 rsp->hdr.Status = STATUS_FILE_CLOSED;
6963 else if (err == -EACCES)
6964 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6965 else if (err == -ESHARE)
6966 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6967 else if (err == -EINVAL)
6968 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6969 else
6970 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6971
6972 smb2_set_err_rsp(work);
6973 ksmbd_fd_put(work, fp);
6974 return err;
6975 }
6976
6977 /**
6978 * smb2_flush() - handler for smb2 flush file - fsync
6979 * @work: smb work containing flush command buffer
6980 *
6981 * Return: 0 on success, otherwise error
6982 */
6983 int smb2_flush(struct ksmbd_work *work)
6984 {
6985 struct smb2_flush_req *req;
6986 struct smb2_flush_rsp *rsp;
6987 int err;
6988
6989 WORK_BUFFERS(work, req, rsp);
6990
6991 ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);
6992
6993 err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
6994 if (err)
6995 goto out;
6996
6997 rsp->StructureSize = cpu_to_le16(4);
6998 rsp->Reserved = 0;
6999 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp));
7000
7001 out:
7002 rsp->hdr.Status = STATUS_INVALID_HANDLE;
7003 smb2_set_err_rsp(work);
7004 return err;
7005 }
7006
7007 /**
7008 * smb2_cancel() - handler for smb2 cancel command
7009 * @work: smb work containing cancel command buffer
7010 *
7011 * Return: 0 on success, otherwise error
7012 */
7013 int smb2_cancel(struct ksmbd_work *work)
7014 {
7015 struct ksmbd_conn *conn = work->conn;
7016 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
7017 struct smb2_hdr *chdr;
7018 struct ksmbd_work *iter;
7019 struct list_head *command_list;
7020
7021 if (work->next_smb2_rcv_hdr_off)
7022 hdr = ksmbd_resp_buf_next(work);
7023
7024 ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
7025 hdr->MessageId, hdr->Flags);
7026
7027 if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
7028 command_list = &conn->async_requests;
7029
7030 spin_lock(&conn->request_lock);
7031 list_for_each_entry(iter, command_list,
7032 async_request_entry) {
7033 chdr = smb2_get_msg(iter->request_buf);
7034
7035 if (iter->async_id !=
7036 le64_to_cpu(hdr->Id.AsyncId))
7037 continue;
7038
7039 ksmbd_debug(SMB,
7040 "smb2 with AsyncId %llu cancelled command = 0x%x\n",
7041 le64_to_cpu(hdr->Id.AsyncId),
7042 le16_to_cpu(chdr->Command));
7043 iter->state = KSMBD_WORK_CANCELLED;
7044 if (iter->cancel_fn)
7045 iter->cancel_fn(iter->cancel_argv);
7046 break;
7047 }
7048 spin_unlock(&conn->request_lock);
7049 } else {
7050 command_list = &conn->requests;
7051
7052 spin_lock(&conn->request_lock);
7053 list_for_each_entry(iter, command_list, request_entry) {
7054 chdr = smb2_get_msg(iter->request_buf);
7055
7056 if (chdr->MessageId != hdr->MessageId ||
7057 iter == work)
7058 continue;
7059
7060 ksmbd_debug(SMB,
7061 "smb2 with mid %llu cancelled command = 0x%x\n",
7062 le64_to_cpu(hdr->MessageId),
7063 le16_to_cpu(chdr->Command));
7064 iter->state = KSMBD_WORK_CANCELLED;
7065 break;
7066 }
7067 spin_unlock(&conn->request_lock);
7068 }
7069
7070 /* For SMB2_CANCEL command itself send no response*/
7071 work->send_no_response = 1;
7072 return 0;
7073 }
7074
7075 struct file_lock *smb_flock_init(struct file *f)
7076 {
7077 struct file_lock *fl;
7078
7079 fl = locks_alloc_lock();
7080 if (!fl)
7081 goto out;
7082
7083 locks_init_lock(fl);
7084
7085 fl->c.flc_owner = f;
7086 fl->c.flc_pid = current->tgid;
7087 fl->c.flc_file = f;
7088 fl->c.flc_flags = FL_POSIX;
7089 fl->fl_ops = NULL;
7090 fl->fl_lmops = NULL;
7091
7092 out:
7093 return fl;
7094 }
7095
7096 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
7097 {
7098 int cmd = -EINVAL;
7099
7100 /* Checking for wrong flag combination during lock request*/
7101 switch (flags) {
7102 case SMB2_LOCKFLAG_SHARED:
7103 ksmbd_debug(SMB, "received shared request\n");
7104 cmd = F_SETLKW;
7105 flock->c.flc_type = F_RDLCK;
7106 flock->c.flc_flags |= FL_SLEEP;
7107 break;
7108 case SMB2_LOCKFLAG_EXCLUSIVE:
7109 ksmbd_debug(SMB, "received exclusive request\n");
7110 cmd = F_SETLKW;
7111 flock->c.flc_type = F_WRLCK;
7112 flock->c.flc_flags |= FL_SLEEP;
7113 break;
7114 case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
7115 ksmbd_debug(SMB,
7116 "received shared & fail immediately request\n");
7117 cmd = F_SETLK;
7118 flock->c.flc_type = F_RDLCK;
7119 break;
7120 case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
7121 ksmbd_debug(SMB,
7122 "received exclusive & fail immediately request\n");
7123 cmd = F_SETLK;
7124 flock->c.flc_type = F_WRLCK;
7125 break;
7126 case SMB2_LOCKFLAG_UNLOCK:
7127 ksmbd_debug(SMB, "received unlock request\n");
7128 flock->c.flc_type = F_UNLCK;
7129 cmd = F_SETLK;
7130 break;
7131 }
7132
7133 return cmd;
7134 }
7135
7136 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
7137 unsigned int cmd, int flags,
7138 struct list_head *lock_list)
7139 {
7140 struct ksmbd_lock *lock;
7141
7142 lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
7143 if (!lock)
7144 return NULL;
7145
7146 lock->cmd = cmd;
7147 lock->fl = flock;
7148 lock->start = flock->fl_start;
7149 lock->end = flock->fl_end;
7150 lock->flags = flags;
7151 if (lock->start == lock->end)
7152 lock->zero_len = 1;
7153 INIT_LIST_HEAD(&lock->clist);
7154 INIT_LIST_HEAD(&lock->flist);
7155 INIT_LIST_HEAD(&lock->llist);
7156 list_add_tail(&lock->llist, lock_list);
7157
7158 return lock;
7159 }
7160
7161 static void smb2_remove_blocked_lock(void **argv)
7162 {
7163 struct file_lock *flock = (struct file_lock *)argv[0];
7164
7165 ksmbd_vfs_posix_lock_unblock(flock);
7166 locks_wake_up(flock);
7167 }
7168
7169 static inline bool lock_defer_pending(struct file_lock *fl)
7170 {
7171 /* check pending lock waiters */
7172 return waitqueue_active(&fl->c.flc_wait);
7173 }
7174
7175 /**
7176 * smb2_lock() - handler for smb2 file lock command
7177 * @work: smb work containing lock command buffer
7178 *
7179 * Return: 0 on success, otherwise error
7180 */
7181 int smb2_lock(struct ksmbd_work *work)
7182 {
7183 struct smb2_lock_req *req;
7184 struct smb2_lock_rsp *rsp;
7185 struct smb2_lock_element *lock_ele;
7186 struct ksmbd_file *fp = NULL;
7187 struct file_lock *flock = NULL;
7188 struct file *filp = NULL;
7189 int lock_count;
7190 int flags = 0;
7191 int cmd = 0;
7192 int err = -EIO, i, rc = 0;
7193 u64 lock_start, lock_length;
7194 struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
7195 struct ksmbd_conn *conn;
7196 int nolock = 0;
7197 LIST_HEAD(lock_list);
7198 LIST_HEAD(rollback_list);
7199 int prior_lock = 0;
7200
7201 WORK_BUFFERS(work, req, rsp);
7202
7203 ksmbd_debug(SMB, "Received lock request\n");
7204 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7205 if (!fp) {
7206 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
7207 err = -ENOENT;
7208 goto out2;
7209 }
7210
7211 filp = fp->filp;
7212 lock_count = le16_to_cpu(req->LockCount);
7213 lock_ele = req->locks;
7214
7215 ksmbd_debug(SMB, "lock count is %d\n", lock_count);
7216 if (!lock_count) {
7217 err = -EINVAL;
7218 goto out2;
7219 }
7220
7221 for (i = 0; i < lock_count; i++) {
7222 flags = le32_to_cpu(lock_ele[i].Flags);
7223
7224 flock = smb_flock_init(filp);
7225 if (!flock)
7226 goto out;
7227
7228 cmd = smb2_set_flock_flags(flock, flags);
7229
7230 lock_start = le64_to_cpu(lock_ele[i].Offset);
7231 lock_length = le64_to_cpu(lock_ele[i].Length);
7232 if (lock_start > U64_MAX - lock_length) {
7233 pr_err("Invalid lock range requested\n");
7234 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
7235 locks_free_lock(flock);
7236 goto out;
7237 }
7238
7239 if (lock_start > OFFSET_MAX)
7240 flock->fl_start = OFFSET_MAX;
7241 else
7242 flock->fl_start = lock_start;
7243
7244 lock_length = le64_to_cpu(lock_ele[i].Length);
7245 if (lock_length > OFFSET_MAX - flock->fl_start)
7246 lock_length = OFFSET_MAX - flock->fl_start;
7247
7248 flock->fl_end = flock->fl_start + lock_length;
7249
7250 if (flock->fl_end < flock->fl_start) {
7251 ksmbd_debug(SMB,
7252 "the end offset(%llx) is smaller than the start offset(%llx)\n",
7253 flock->fl_end, flock->fl_start);
7254 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
7255 locks_free_lock(flock);
7256 goto out;
7257 }
7258
7259 /* Check conflict locks in one request */
7260 list_for_each_entry(cmp_lock, &lock_list, llist) {
7261 if (cmp_lock->fl->fl_start <= flock->fl_start &&
7262 cmp_lock->fl->fl_end >= flock->fl_end) {
7263 if (cmp_lock->fl->c.flc_type != F_UNLCK &&
7264 flock->c.flc_type != F_UNLCK) {
7265 pr_err("conflict two locks in one request\n");
7266 err = -EINVAL;
7267 locks_free_lock(flock);
7268 goto out;
7269 }
7270 }
7271 }
7272
7273 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
7274 if (!smb_lock) {
7275 err = -EINVAL;
7276 locks_free_lock(flock);
7277 goto out;
7278 }
7279 }
7280
7281 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7282 if (smb_lock->cmd < 0) {
7283 err = -EINVAL;
7284 goto out;
7285 }
7286
7287 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
7288 err = -EINVAL;
7289 goto out;
7290 }
7291
7292 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
7293 smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
7294 (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
7295 !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
7296 err = -EINVAL;
7297 goto out;
7298 }
7299
7300 prior_lock = smb_lock->flags;
7301
7302 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
7303 !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
7304 goto no_check_cl;
7305
7306 nolock = 1;
7307 /* check locks in connection list */
7308 down_read(&conn_list_lock);
7309 list_for_each_entry(conn, &conn_list, conns_list) {
7310 spin_lock(&conn->llist_lock);
7311 list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
7312 if (file_inode(cmp_lock->fl->c.flc_file) !=
7313 file_inode(smb_lock->fl->c.flc_file))
7314 continue;
7315
7316 if (lock_is_unlock(smb_lock->fl)) {
7317 if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file &&
7318 cmp_lock->start == smb_lock->start &&
7319 cmp_lock->end == smb_lock->end &&
7320 !lock_defer_pending(cmp_lock->fl)) {
7321 nolock = 0;
7322 list_del(&cmp_lock->flist);
7323 list_del(&cmp_lock->clist);
7324 spin_unlock(&conn->llist_lock);
7325 up_read(&conn_list_lock);
7326
7327 locks_free_lock(cmp_lock->fl);
7328 kfree(cmp_lock);
7329 goto out_check_cl;
7330 }
7331 continue;
7332 }
7333
7334 if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file) {
7335 if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
7336 continue;
7337 } else {
7338 if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
7339 continue;
7340 }
7341
7342 /* check zero byte lock range */
7343 if (cmp_lock->zero_len && !smb_lock->zero_len &&
7344 cmp_lock->start > smb_lock->start &&
7345 cmp_lock->start < smb_lock->end) {
7346 spin_unlock(&conn->llist_lock);
7347 up_read(&conn_list_lock);
7348 pr_err("previous lock conflict with zero byte lock range\n");
7349 goto out;
7350 }
7351
7352 if (smb_lock->zero_len && !cmp_lock->zero_len &&
7353 smb_lock->start > cmp_lock->start &&
7354 smb_lock->start < cmp_lock->end) {
7355 spin_unlock(&conn->llist_lock);
7356 up_read(&conn_list_lock);
7357 pr_err("current lock conflict with zero byte lock range\n");
7358 goto out;
7359 }
7360
7361 if (((cmp_lock->start <= smb_lock->start &&
7362 cmp_lock->end > smb_lock->start) ||
7363 (cmp_lock->start < smb_lock->end &&
7364 cmp_lock->end >= smb_lock->end)) &&
7365 !cmp_lock->zero_len && !smb_lock->zero_len) {
7366 spin_unlock(&conn->llist_lock);
7367 up_read(&conn_list_lock);
7368 pr_err("Not allow lock operation on exclusive lock range\n");
7369 goto out;
7370 }
7371 }
7372 spin_unlock(&conn->llist_lock);
7373 }
7374 up_read(&conn_list_lock);
7375 out_check_cl:
7376 if (lock_is_unlock(smb_lock->fl) && nolock) {
7377 pr_err("Try to unlock nolocked range\n");
7378 rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
7379 goto out;
7380 }
7381
7382 no_check_cl:
7383 if (smb_lock->zero_len) {
7384 err = 0;
7385 goto skip;
7386 }
7387
7388 flock = smb_lock->fl;
7389 list_del(&smb_lock->llist);
7390 retry:
7391 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
7392 skip:
7393 if (flags & SMB2_LOCKFLAG_UNLOCK) {
7394 if (!rc) {
7395 ksmbd_debug(SMB, "File unlocked\n");
7396 } else if (rc == -ENOENT) {
7397 rsp->hdr.Status = STATUS_NOT_LOCKED;
7398 goto out;
7399 }
7400 locks_free_lock(flock);
7401 kfree(smb_lock);
7402 } else {
7403 if (rc == FILE_LOCK_DEFERRED) {
7404 void **argv;
7405
7406 ksmbd_debug(SMB,
7407 "would have to wait for getting lock\n");
7408 list_add(&smb_lock->llist, &rollback_list);
7409
7410 argv = kmalloc(sizeof(void *), GFP_KERNEL);
7411 if (!argv) {
7412 err = -ENOMEM;
7413 goto out;
7414 }
7415 argv[0] = flock;
7416
7417 rc = setup_async_work(work,
7418 smb2_remove_blocked_lock,
7419 argv);
7420 if (rc) {
7421 kfree(argv);
7422 err = -ENOMEM;
7423 goto out;
7424 }
7425 spin_lock(&fp->f_lock);
7426 list_add(&work->fp_entry, &fp->blocked_works);
7427 spin_unlock(&fp->f_lock);
7428
7429 smb2_send_interim_resp(work, STATUS_PENDING);
7430
7431 ksmbd_vfs_posix_lock_wait(flock);
7432
7433 spin_lock(&fp->f_lock);
7434 list_del(&work->fp_entry);
7435 spin_unlock(&fp->f_lock);
7436
7437 if (work->state != KSMBD_WORK_ACTIVE) {
7438 list_del(&smb_lock->llist);
7439 locks_free_lock(flock);
7440
7441 if (work->state == KSMBD_WORK_CANCELLED) {
7442 rsp->hdr.Status =
7443 STATUS_CANCELLED;
7444 kfree(smb_lock);
7445 smb2_send_interim_resp(work,
7446 STATUS_CANCELLED);
7447 work->send_no_response = 1;
7448 goto out;
7449 }
7450
7451 rsp->hdr.Status =
7452 STATUS_RANGE_NOT_LOCKED;
7453 kfree(smb_lock);
7454 goto out2;
7455 }
7456
7457 list_del(&smb_lock->llist);
7458 release_async_work(work);
7459 goto retry;
7460 } else if (!rc) {
7461 list_add(&smb_lock->llist, &rollback_list);
7462 spin_lock(&work->conn->llist_lock);
7463 list_add_tail(&smb_lock->clist,
7464 &work->conn->lock_list);
7465 list_add_tail(&smb_lock->flist,
7466 &fp->lock_list);
7467 spin_unlock(&work->conn->llist_lock);
7468 ksmbd_debug(SMB, "successful in taking lock\n");
7469 } else {
7470 goto out;
7471 }
7472 }
7473 }
7474
7475 if (atomic_read(&fp->f_ci->op_count) > 1)
7476 smb_break_all_oplock(work, fp);
7477
7478 rsp->StructureSize = cpu_to_le16(4);
7479 ksmbd_debug(SMB, "successful in taking lock\n");
7480 rsp->hdr.Status = STATUS_SUCCESS;
7481 rsp->Reserved = 0;
7482 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp));
7483 if (err)
7484 goto out;
7485
7486 ksmbd_fd_put(work, fp);
7487 return 0;
7488
7489 out:
7490 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7491 locks_free_lock(smb_lock->fl);
7492 list_del(&smb_lock->llist);
7493 kfree(smb_lock);
7494 }
7495
7496 list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7497 struct file_lock *rlock = NULL;
7498
7499 rlock = smb_flock_init(filp);
7500 rlock->c.flc_type = F_UNLCK;
7501 rlock->fl_start = smb_lock->start;
7502 rlock->fl_end = smb_lock->end;
7503
7504 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);
7505 if (rc)
7506 pr_err("rollback unlock fail : %d\n", rc);
7507
7508 list_del(&smb_lock->llist);
7509 spin_lock(&work->conn->llist_lock);
7510 if (!list_empty(&smb_lock->flist))
7511 list_del(&smb_lock->flist);
7512 list_del(&smb_lock->clist);
7513 spin_unlock(&work->conn->llist_lock);
7514
7515 locks_free_lock(smb_lock->fl);
7516 locks_free_lock(rlock);
7517 kfree(smb_lock);
7518 }
7519 out2:
7520 ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7521
7522 if (!rsp->hdr.Status) {
7523 if (err == -EINVAL)
7524 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7525 else if (err == -ENOMEM)
7526 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7527 else if (err == -ENOENT)
7528 rsp->hdr.Status = STATUS_FILE_CLOSED;
7529 else
7530 rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7531 }
7532
7533 smb2_set_err_rsp(work);
7534 ksmbd_fd_put(work, fp);
7535 return err;
7536 }
7537
7538 static int fsctl_copychunk(struct ksmbd_work *work,
7539 struct copychunk_ioctl_req *ci_req,
7540 unsigned int cnt_code,
7541 unsigned int input_count,
7542 unsigned long long volatile_id,
7543 unsigned long long persistent_id,
7544 struct smb2_ioctl_rsp *rsp)
7545 {
7546 struct copychunk_ioctl_rsp *ci_rsp;
7547 struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7548 struct srv_copychunk *chunks;
7549 unsigned int i, chunk_count, chunk_count_written = 0;
7550 unsigned int chunk_size_written = 0;
7551 loff_t total_size_written = 0;
7552 int ret = 0;
7553
7554 ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7555
7556 rsp->VolatileFileId = volatile_id;
7557 rsp->PersistentFileId = persistent_id;
7558 ci_rsp->ChunksWritten =
7559 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7560 ci_rsp->ChunkBytesWritten =
7561 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7562 ci_rsp->TotalBytesWritten =
7563 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7564
7565 chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7566 chunk_count = le32_to_cpu(ci_req->ChunkCount);
7567 if (chunk_count == 0)
7568 goto out;
7569 total_size_written = 0;
7570
7571 /* verify the SRV_COPYCHUNK_COPY packet */
7572 if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7573 input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
7574 chunk_count * sizeof(struct srv_copychunk)) {
7575 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7576 return -EINVAL;
7577 }
7578
7579 for (i = 0; i < chunk_count; i++) {
7580 if (le32_to_cpu(chunks[i].Length) == 0 ||
7581 le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7582 break;
7583 total_size_written += le32_to_cpu(chunks[i].Length);
7584 }
7585
7586 if (i < chunk_count ||
7587 total_size_written > ksmbd_server_side_copy_max_total_size()) {
7588 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7589 return -EINVAL;
7590 }
7591
7592 src_fp = ksmbd_lookup_foreign_fd(work,
7593 le64_to_cpu(ci_req->ResumeKey[0]));
7594 dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7595 ret = -EINVAL;
7596 if (!src_fp ||
7597 src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7598 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7599 goto out;
7600 }
7601
7602 if (!dst_fp) {
7603 rsp->hdr.Status = STATUS_FILE_CLOSED;
7604 goto out;
7605 }
7606
7607 /*
7608 * FILE_READ_DATA should only be included in
7609 * the FSCTL_COPYCHUNK case
7610 */
7611 if (cnt_code == FSCTL_COPYCHUNK &&
7612 !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7613 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7614 goto out;
7615 }
7616
7617 ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7618 chunks, chunk_count,
7619 &chunk_count_written,
7620 &chunk_size_written,
7621 &total_size_written);
7622 if (ret < 0) {
7623 if (ret == -EACCES)
7624 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7625 if (ret == -EAGAIN)
7626 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7627 else if (ret == -EBADF)
7628 rsp->hdr.Status = STATUS_INVALID_HANDLE;
7629 else if (ret == -EFBIG || ret == -ENOSPC)
7630 rsp->hdr.Status = STATUS_DISK_FULL;
7631 else if (ret == -EINVAL)
7632 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7633 else if (ret == -EISDIR)
7634 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7635 else if (ret == -E2BIG)
7636 rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7637 else
7638 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7639 }
7640
7641 ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7642 ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7643 ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7644 out:
7645 ksmbd_fd_put(work, src_fp);
7646 ksmbd_fd_put(work, dst_fp);
7647 return ret;
7648 }
7649
7650 static __be32 idev_ipv4_address(struct in_device *idev)
7651 {
7652 __be32 addr = 0;
7653
7654 struct in_ifaddr *ifa;
7655
7656 rcu_read_lock();
7657 in_dev_for_each_ifa_rcu(ifa, idev) {
7658 if (ifa->ifa_flags & IFA_F_SECONDARY)
7659 continue;
7660
7661 addr = ifa->ifa_address;
7662 break;
7663 }
7664 rcu_read_unlock();
7665 return addr;
7666 }
7667
7668 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7669 struct smb2_ioctl_rsp *rsp,
7670 unsigned int out_buf_len)
7671 {
7672 struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7673 int nbytes = 0;
7674 struct net_device *netdev;
7675 struct sockaddr_storage_rsp *sockaddr_storage;
7676 unsigned int flags;
7677 unsigned long long speed;
7678
7679 rtnl_lock();
7680 for_each_netdev(&init_net, netdev) {
7681 bool ipv4_set = false;
7682
7683 if (netdev->type == ARPHRD_LOOPBACK)
7684 continue;
7685
7686 flags = dev_get_flags(netdev);
7687 if (!(flags & IFF_RUNNING))
7688 continue;
7689 ipv6_retry:
7690 if (out_buf_len <
7691 nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7692 rtnl_unlock();
7693 return -ENOSPC;
7694 }
7695
7696 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7697 &rsp->Buffer[nbytes];
7698 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7699
7700 nii_rsp->Capability = 0;
7701 if (netdev->real_num_tx_queues > 1)
7702 nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7703 if (ksmbd_rdma_capable_netdev(netdev))
7704 nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7705
7706 nii_rsp->Next = cpu_to_le32(152);
7707 nii_rsp->Reserved = 0;
7708
7709 if (netdev->ethtool_ops->get_link_ksettings) {
7710 struct ethtool_link_ksettings cmd;
7711
7712 netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7713 speed = cmd.base.speed;
7714 } else {
7715 ksmbd_debug(SMB, "%s %s\n", netdev->name,
7716 "speed is unknown, defaulting to 1Gb/sec");
7717 speed = SPEED_1000;
7718 }
7719
7720 speed *= 1000000;
7721 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7722
7723 sockaddr_storage = (struct sockaddr_storage_rsp *)
7724 nii_rsp->SockAddr_Storage;
7725 memset(sockaddr_storage, 0, 128);
7726
7727 if (!ipv4_set) {
7728 struct in_device *idev;
7729
7730 sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7731 sockaddr_storage->addr4.Port = 0;
7732
7733 idev = __in_dev_get_rtnl(netdev);
7734 if (!idev)
7735 continue;
7736 sockaddr_storage->addr4.IPv4address =
7737 idev_ipv4_address(idev);
7738 nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7739 ipv4_set = true;
7740 goto ipv6_retry;
7741 } else {
7742 struct inet6_dev *idev6;
7743 struct inet6_ifaddr *ifa;
7744 __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7745
7746 sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7747 sockaddr_storage->addr6.Port = 0;
7748 sockaddr_storage->addr6.FlowInfo = 0;
7749
7750 idev6 = __in6_dev_get(netdev);
7751 if (!idev6)
7752 continue;
7753
7754 list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7755 if (ifa->flags & (IFA_F_TENTATIVE |
7756 IFA_F_DEPRECATED))
7757 continue;
7758 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7759 break;
7760 }
7761 sockaddr_storage->addr6.ScopeId = 0;
7762 nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7763 }
7764 }
7765 rtnl_unlock();
7766
7767 /* zero if this is last one */
7768 if (nii_rsp)
7769 nii_rsp->Next = 0;
7770
7771 rsp->PersistentFileId = SMB2_NO_FID;
7772 rsp->VolatileFileId = SMB2_NO_FID;
7773 return nbytes;
7774 }
7775
7776 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7777 struct validate_negotiate_info_req *neg_req,
7778 struct validate_negotiate_info_rsp *neg_rsp,
7779 unsigned int in_buf_len)
7780 {
7781 int ret = 0;
7782 int dialect;
7783
7784 if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7785 le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7786 return -EINVAL;
7787
7788 dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7789 neg_req->DialectCount);
7790 if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7791 ret = -EINVAL;
7792 goto err_out;
7793 }
7794
7795 if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7796 ret = -EINVAL;
7797 goto err_out;
7798 }
7799
7800 if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7801 ret = -EINVAL;
7802 goto err_out;
7803 }
7804
7805 if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7806 ret = -EINVAL;
7807 goto err_out;
7808 }
7809
7810 neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7811 memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7812 neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7813 neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7814 err_out:
7815 return ret;
7816 }
7817
7818 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7819 struct file_allocated_range_buffer *qar_req,
7820 struct file_allocated_range_buffer *qar_rsp,
7821 unsigned int in_count, unsigned int *out_count)
7822 {
7823 struct ksmbd_file *fp;
7824 loff_t start, length;
7825 int ret = 0;
7826
7827 *out_count = 0;
7828 if (in_count == 0)
7829 return -EINVAL;
7830
7831 start = le64_to_cpu(qar_req->file_offset);
7832 length = le64_to_cpu(qar_req->length);
7833
7834 if (start < 0 || length < 0)
7835 return -EINVAL;
7836
7837 fp = ksmbd_lookup_fd_fast(work, id);
7838 if (!fp)
7839 return -ENOENT;
7840
7841 ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7842 qar_rsp, in_count, out_count);
7843 if (ret && ret != -E2BIG)
7844 *out_count = 0;
7845
7846 ksmbd_fd_put(work, fp);
7847 return ret;
7848 }
7849
7850 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7851 unsigned int out_buf_len,
7852 struct smb2_ioctl_req *req,
7853 struct smb2_ioctl_rsp *rsp)
7854 {
7855 struct ksmbd_rpc_command *rpc_resp;
7856 char *data_buf = (char *)req + le32_to_cpu(req->InputOffset);
7857 int nbytes = 0;
7858
7859 rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7860 le32_to_cpu(req->InputCount));
7861 if (rpc_resp) {
7862 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7863 /*
7864 * set STATUS_SOME_NOT_MAPPED response
7865 * for unknown domain sid.
7866 */
7867 rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7868 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7869 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7870 goto out;
7871 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7872 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7873 goto out;
7874 }
7875
7876 nbytes = rpc_resp->payload_sz;
7877 if (rpc_resp->payload_sz > out_buf_len) {
7878 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7879 nbytes = out_buf_len;
7880 }
7881
7882 if (!rpc_resp->payload_sz) {
7883 rsp->hdr.Status =
7884 STATUS_UNEXPECTED_IO_ERROR;
7885 goto out;
7886 }
7887
7888 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7889 }
7890 out:
7891 kvfree(rpc_resp);
7892 return nbytes;
7893 }
7894
7895 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7896 struct file_sparse *sparse)
7897 {
7898 struct ksmbd_file *fp;
7899 struct mnt_idmap *idmap;
7900 int ret = 0;
7901 __le32 old_fattr;
7902
7903 fp = ksmbd_lookup_fd_fast(work, id);
7904 if (!fp)
7905 return -ENOENT;
7906 idmap = file_mnt_idmap(fp->filp);
7907
7908 old_fattr = fp->f_ci->m_fattr;
7909 if (sparse->SetSparse)
7910 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
7911 else
7912 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
7913
7914 if (fp->f_ci->m_fattr != old_fattr &&
7915 test_share_config_flag(work->tcon->share_conf,
7916 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7917 struct xattr_dos_attrib da;
7918
7919 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap,
7920 fp->filp->f_path.dentry, &da);
7921 if (ret <= 0)
7922 goto out;
7923
7924 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7925 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap,
7926 &fp->filp->f_path,
7927 &da, true);
7928 if (ret)
7929 fp->f_ci->m_fattr = old_fattr;
7930 }
7931
7932 out:
7933 ksmbd_fd_put(work, fp);
7934 return ret;
7935 }
7936
7937 static int fsctl_request_resume_key(struct ksmbd_work *work,
7938 struct smb2_ioctl_req *req,
7939 struct resume_key_ioctl_rsp *key_rsp)
7940 {
7941 struct ksmbd_file *fp;
7942
7943 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7944 if (!fp)
7945 return -ENOENT;
7946
7947 memset(key_rsp, 0, sizeof(*key_rsp));
7948 key_rsp->ResumeKey[0] = req->VolatileFileId;
7949 key_rsp->ResumeKey[1] = req->PersistentFileId;
7950 ksmbd_fd_put(work, fp);
7951
7952 return 0;
7953 }
7954
7955 /**
7956 * smb2_ioctl() - handler for smb2 ioctl command
7957 * @work: smb work containing ioctl command buffer
7958 *
7959 * Return: 0 on success, otherwise error
7960 */
7961 int smb2_ioctl(struct ksmbd_work *work)
7962 {
7963 struct smb2_ioctl_req *req;
7964 struct smb2_ioctl_rsp *rsp;
7965 unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
7966 u64 id = KSMBD_NO_FID;
7967 struct ksmbd_conn *conn = work->conn;
7968 int ret = 0;
7969 char *buffer;
7970
7971 if (work->next_smb2_rcv_hdr_off) {
7972 req = ksmbd_req_buf_next(work);
7973 rsp = ksmbd_resp_buf_next(work);
7974 if (!has_file_id(req->VolatileFileId)) {
7975 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7976 work->compound_fid);
7977 id = work->compound_fid;
7978 }
7979 } else {
7980 req = smb2_get_msg(work->request_buf);
7981 rsp = smb2_get_msg(work->response_buf);
7982 }
7983
7984 if (!has_file_id(id))
7985 id = req->VolatileFileId;
7986
7987 if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7988 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7989 goto out;
7990 }
7991
7992 buffer = (char *)req + le32_to_cpu(req->InputOffset);
7993
7994 cnt_code = le32_to_cpu(req->CtlCode);
7995 ret = smb2_calc_max_out_buf_len(work, 48,
7996 le32_to_cpu(req->MaxOutputResponse));
7997 if (ret < 0) {
7998 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7999 goto out;
8000 }
8001 out_buf_len = (unsigned int)ret;
8002 in_buf_len = le32_to_cpu(req->InputCount);
8003
8004 switch (cnt_code) {
8005 case FSCTL_DFS_GET_REFERRALS:
8006 case FSCTL_DFS_GET_REFERRALS_EX:
8007 /* Not support DFS yet */
8008 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
8009 goto out;
8010 case FSCTL_CREATE_OR_GET_OBJECT_ID:
8011 {
8012 struct file_object_buf_type1_ioctl_rsp *obj_buf;
8013
8014 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
8015 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
8016 &rsp->Buffer[0];
8017
8018 /*
8019 * TODO: This is dummy implementation to pass smbtorture
8020 * Need to check correct response later
8021 */
8022 memset(obj_buf->ObjectId, 0x0, 16);
8023 memset(obj_buf->BirthVolumeId, 0x0, 16);
8024 memset(obj_buf->BirthObjectId, 0x0, 16);
8025 memset(obj_buf->DomainId, 0x0, 16);
8026
8027 break;
8028 }
8029 case FSCTL_PIPE_TRANSCEIVE:
8030 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
8031 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
8032 break;
8033 case FSCTL_VALIDATE_NEGOTIATE_INFO:
8034 if (conn->dialect < SMB30_PROT_ID) {
8035 ret = -EOPNOTSUPP;
8036 goto out;
8037 }
8038
8039 if (in_buf_len < offsetof(struct validate_negotiate_info_req,
8040 Dialects)) {
8041 ret = -EINVAL;
8042 goto out;
8043 }
8044
8045 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
8046 ret = -EINVAL;
8047 goto out;
8048 }
8049
8050 ret = fsctl_validate_negotiate_info(conn,
8051 (struct validate_negotiate_info_req *)buffer,
8052 (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
8053 in_buf_len);
8054 if (ret < 0)
8055 goto out;
8056
8057 nbytes = sizeof(struct validate_negotiate_info_rsp);
8058 rsp->PersistentFileId = SMB2_NO_FID;
8059 rsp->VolatileFileId = SMB2_NO_FID;
8060 break;
8061 case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
8062 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
8063 if (ret < 0)
8064 goto out;
8065 nbytes = ret;
8066 break;
8067 case FSCTL_REQUEST_RESUME_KEY:
8068 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
8069 ret = -EINVAL;
8070 goto out;
8071 }
8072
8073 ret = fsctl_request_resume_key(work, req,
8074 (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
8075 if (ret < 0)
8076 goto out;
8077 rsp->PersistentFileId = req->PersistentFileId;
8078 rsp->VolatileFileId = req->VolatileFileId;
8079 nbytes = sizeof(struct resume_key_ioctl_rsp);
8080 break;
8081 case FSCTL_COPYCHUNK:
8082 case FSCTL_COPYCHUNK_WRITE:
8083 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
8084 ksmbd_debug(SMB,
8085 "User does not have write permission\n");
8086 ret = -EACCES;
8087 goto out;
8088 }
8089
8090 if (in_buf_len <= sizeof(struct copychunk_ioctl_req)) {
8091 ret = -EINVAL;
8092 goto out;
8093 }
8094
8095 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
8096 ret = -EINVAL;
8097 goto out;
8098 }
8099
8100 nbytes = sizeof(struct copychunk_ioctl_rsp);
8101 rsp->VolatileFileId = req->VolatileFileId;
8102 rsp->PersistentFileId = req->PersistentFileId;
8103 fsctl_copychunk(work,
8104 (struct copychunk_ioctl_req *)buffer,
8105 le32_to_cpu(req->CtlCode),
8106 le32_to_cpu(req->InputCount),
8107 req->VolatileFileId,
8108 req->PersistentFileId,
8109 rsp);
8110 break;
8111 case FSCTL_SET_SPARSE:
8112 if (in_buf_len < sizeof(struct file_sparse)) {
8113 ret = -EINVAL;
8114 goto out;
8115 }
8116
8117 ret = fsctl_set_sparse(work, id, (struct file_sparse *)buffer);
8118 if (ret < 0)
8119 goto out;
8120 break;
8121 case FSCTL_SET_ZERO_DATA:
8122 {
8123 struct file_zero_data_information *zero_data;
8124 struct ksmbd_file *fp;
8125 loff_t off, len, bfz;
8126
8127 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
8128 ksmbd_debug(SMB,
8129 "User does not have write permission\n");
8130 ret = -EACCES;
8131 goto out;
8132 }
8133
8134 if (in_buf_len < sizeof(struct file_zero_data_information)) {
8135 ret = -EINVAL;
8136 goto out;
8137 }
8138
8139 zero_data =
8140 (struct file_zero_data_information *)buffer;
8141
8142 off = le64_to_cpu(zero_data->FileOffset);
8143 bfz = le64_to_cpu(zero_data->BeyondFinalZero);
8144 if (off < 0 || bfz < 0 || off > bfz) {
8145 ret = -EINVAL;
8146 goto out;
8147 }
8148
8149 len = bfz - off;
8150 if (len) {
8151 fp = ksmbd_lookup_fd_fast(work, id);
8152 if (!fp) {
8153 ret = -ENOENT;
8154 goto out;
8155 }
8156
8157 ret = ksmbd_vfs_zero_data(work, fp, off, len);
8158 ksmbd_fd_put(work, fp);
8159 if (ret < 0)
8160 goto out;
8161 }
8162 break;
8163 }
8164 case FSCTL_QUERY_ALLOCATED_RANGES:
8165 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
8166 ret = -EINVAL;
8167 goto out;
8168 }
8169
8170 ret = fsctl_query_allocated_ranges(work, id,
8171 (struct file_allocated_range_buffer *)buffer,
8172 (struct file_allocated_range_buffer *)&rsp->Buffer[0],
8173 out_buf_len /
8174 sizeof(struct file_allocated_range_buffer), &nbytes);
8175 if (ret == -E2BIG) {
8176 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
8177 } else if (ret < 0) {
8178 nbytes = 0;
8179 goto out;
8180 }
8181
8182 nbytes *= sizeof(struct file_allocated_range_buffer);
8183 break;
8184 case FSCTL_GET_REPARSE_POINT:
8185 {
8186 struct reparse_data_buffer *reparse_ptr;
8187 struct ksmbd_file *fp;
8188
8189 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
8190 fp = ksmbd_lookup_fd_fast(work, id);
8191 if (!fp) {
8192 pr_err("not found fp!!\n");
8193 ret = -ENOENT;
8194 goto out;
8195 }
8196
8197 reparse_ptr->ReparseTag =
8198 smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
8199 reparse_ptr->ReparseDataLength = 0;
8200 ksmbd_fd_put(work, fp);
8201 nbytes = sizeof(struct reparse_data_buffer);
8202 break;
8203 }
8204 case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
8205 {
8206 struct ksmbd_file *fp_in, *fp_out = NULL;
8207 struct duplicate_extents_to_file *dup_ext;
8208 loff_t src_off, dst_off, length, cloned;
8209
8210 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
8211 ret = -EINVAL;
8212 goto out;
8213 }
8214
8215 dup_ext = (struct duplicate_extents_to_file *)buffer;
8216
8217 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
8218 dup_ext->PersistentFileHandle);
8219 if (!fp_in) {
8220 pr_err("not found file handle in duplicate extent to file\n");
8221 ret = -ENOENT;
8222 goto out;
8223 }
8224
8225 fp_out = ksmbd_lookup_fd_fast(work, id);
8226 if (!fp_out) {
8227 pr_err("not found fp\n");
8228 ret = -ENOENT;
8229 goto dup_ext_out;
8230 }
8231
8232 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
8233 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
8234 length = le64_to_cpu(dup_ext->ByteCount);
8235 /*
8236 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
8237 * should fall back to vfs_copy_file_range(). This could be
8238 * beneficial when re-exporting nfs/smb mount, but note that
8239 * this can result in partial copy that returns an error status.
8240 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
8241 * fall back to vfs_copy_file_range(), should be avoided when
8242 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
8243 */
8244 cloned = vfs_clone_file_range(fp_in->filp, src_off,
8245 fp_out->filp, dst_off, length, 0);
8246 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
8247 ret = -EOPNOTSUPP;
8248 goto dup_ext_out;
8249 } else if (cloned != length) {
8250 cloned = vfs_copy_file_range(fp_in->filp, src_off,
8251 fp_out->filp, dst_off,
8252 length, 0);
8253 if (cloned != length) {
8254 if (cloned < 0)
8255 ret = cloned;
8256 else
8257 ret = -EINVAL;
8258 }
8259 }
8260
8261 dup_ext_out:
8262 ksmbd_fd_put(work, fp_in);
8263 ksmbd_fd_put(work, fp_out);
8264 if (ret < 0)
8265 goto out;
8266 break;
8267 }
8268 default:
8269 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
8270 cnt_code);
8271 ret = -EOPNOTSUPP;
8272 goto out;
8273 }
8274
8275 rsp->CtlCode = cpu_to_le32(cnt_code);
8276 rsp->InputCount = cpu_to_le32(0);
8277 rsp->InputOffset = cpu_to_le32(112);
8278 rsp->OutputOffset = cpu_to_le32(112);
8279 rsp->OutputCount = cpu_to_le32(nbytes);
8280 rsp->StructureSize = cpu_to_le16(49);
8281 rsp->Reserved = cpu_to_le16(0);
8282 rsp->Flags = cpu_to_le32(0);
8283 rsp->Reserved2 = cpu_to_le32(0);
8284 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes);
8285 if (!ret)
8286 return ret;
8287
8288 out:
8289 if (ret == -EACCES)
8290 rsp->hdr.Status = STATUS_ACCESS_DENIED;
8291 else if (ret == -ENOENT)
8292 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
8293 else if (ret == -EOPNOTSUPP)
8294 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
8295 else if (ret == -ENOSPC)
8296 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
8297 else if (ret < 0 || rsp->hdr.Status == 0)
8298 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8299 smb2_set_err_rsp(work);
8300 return 0;
8301 }
8302
8303 /**
8304 * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
8305 * @work: smb work containing oplock break command buffer
8306 *
8307 * Return: 0
8308 */
8309 static void smb20_oplock_break_ack(struct ksmbd_work *work)
8310 {
8311 struct smb2_oplock_break *req;
8312 struct smb2_oplock_break *rsp;
8313 struct ksmbd_file *fp;
8314 struct oplock_info *opinfo = NULL;
8315 __le32 err = 0;
8316 int ret = 0;
8317 u64 volatile_id, persistent_id;
8318 char req_oplevel = 0, rsp_oplevel = 0;
8319 unsigned int oplock_change_type;
8320
8321 WORK_BUFFERS(work, req, rsp);
8322
8323 volatile_id = req->VolatileFid;
8324 persistent_id = req->PersistentFid;
8325 req_oplevel = req->OplockLevel;
8326 ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
8327 volatile_id, persistent_id, req_oplevel);
8328
8329 fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
8330 if (!fp) {
8331 rsp->hdr.Status = STATUS_FILE_CLOSED;
8332 smb2_set_err_rsp(work);
8333 return;
8334 }
8335
8336 opinfo = opinfo_get(fp);
8337 if (!opinfo) {
8338 pr_err("unexpected null oplock_info\n");
8339 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8340 smb2_set_err_rsp(work);
8341 ksmbd_fd_put(work, fp);
8342 return;
8343 }
8344
8345 if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
8346 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8347 goto err_out;
8348 }
8349
8350 if (opinfo->op_state == OPLOCK_STATE_NONE) {
8351 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
8352 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8353 goto err_out;
8354 }
8355
8356 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8357 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8358 (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
8359 req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
8360 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8361 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8362 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8363 req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
8364 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8365 oplock_change_type = OPLOCK_READ_TO_NONE;
8366 } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
8367 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8368 err = STATUS_INVALID_DEVICE_STATE;
8369 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8370 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8371 req_oplevel == SMB2_OPLOCK_LEVEL_II) {
8372 oplock_change_type = OPLOCK_WRITE_TO_READ;
8373 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8374 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8375 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8376 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8377 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8378 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8379 oplock_change_type = OPLOCK_READ_TO_NONE;
8380 } else {
8381 oplock_change_type = 0;
8382 }
8383 } else {
8384 oplock_change_type = 0;
8385 }
8386
8387 switch (oplock_change_type) {
8388 case OPLOCK_WRITE_TO_READ:
8389 ret = opinfo_write_to_read(opinfo);
8390 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
8391 break;
8392 case OPLOCK_WRITE_TO_NONE:
8393 ret = opinfo_write_to_none(opinfo);
8394 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8395 break;
8396 case OPLOCK_READ_TO_NONE:
8397 ret = opinfo_read_to_none(opinfo);
8398 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8399 break;
8400 default:
8401 pr_err("unknown oplock change 0x%x -> 0x%x\n",
8402 opinfo->level, rsp_oplevel);
8403 }
8404
8405 if (ret < 0) {
8406 rsp->hdr.Status = err;
8407 goto err_out;
8408 }
8409
8410 opinfo->op_state = OPLOCK_STATE_NONE;
8411 wake_up_interruptible_all(&opinfo->oplock_q);
8412 opinfo_put(opinfo);
8413 ksmbd_fd_put(work, fp);
8414
8415 rsp->StructureSize = cpu_to_le16(24);
8416 rsp->OplockLevel = rsp_oplevel;
8417 rsp->Reserved = 0;
8418 rsp->Reserved2 = 0;
8419 rsp->VolatileFid = volatile_id;
8420 rsp->PersistentFid = persistent_id;
8421 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break));
8422 if (!ret)
8423 return;
8424
8425 err_out:
8426 opinfo->op_state = OPLOCK_STATE_NONE;
8427 wake_up_interruptible_all(&opinfo->oplock_q);
8428
8429 opinfo_put(opinfo);
8430 ksmbd_fd_put(work, fp);
8431 smb2_set_err_rsp(work);
8432 }
8433
8434 static int check_lease_state(struct lease *lease, __le32 req_state)
8435 {
8436 if ((lease->new_state ==
8437 (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8438 !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8439 lease->new_state = req_state;
8440 return 0;
8441 }
8442
8443 if (lease->new_state == req_state)
8444 return 0;
8445
8446 return 1;
8447 }
8448
8449 /**
8450 * smb21_lease_break_ack() - handler for smb2.1 lease break command
8451 * @work: smb work containing lease break command buffer
8452 *
8453 * Return: 0
8454 */
8455 static void smb21_lease_break_ack(struct ksmbd_work *work)
8456 {
8457 struct ksmbd_conn *conn = work->conn;
8458 struct smb2_lease_ack *req;
8459 struct smb2_lease_ack *rsp;
8460 struct oplock_info *opinfo;
8461 __le32 err = 0;
8462 int ret = 0;
8463 unsigned int lease_change_type;
8464 __le32 lease_state;
8465 struct lease *lease;
8466
8467 WORK_BUFFERS(work, req, rsp);
8468
8469 ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8470 le32_to_cpu(req->LeaseState));
8471 opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8472 if (!opinfo) {
8473 ksmbd_debug(OPLOCK, "file not opened\n");
8474 smb2_set_err_rsp(work);
8475 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8476 return;
8477 }
8478 lease = opinfo->o_lease;
8479
8480 if (opinfo->op_state == OPLOCK_STATE_NONE) {
8481 pr_err("unexpected lease break state 0x%x\n",
8482 opinfo->op_state);
8483 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8484 goto err_out;
8485 }
8486
8487 if (check_lease_state(lease, req->LeaseState)) {
8488 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8489 ksmbd_debug(OPLOCK,
8490 "req lease state: 0x%x, expected state: 0x%x\n",
8491 req->LeaseState, lease->new_state);
8492 goto err_out;
8493 }
8494
8495 if (!atomic_read(&opinfo->breaking_cnt)) {
8496 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8497 goto err_out;
8498 }
8499
8500 /* check for bad lease state */
8501 if (req->LeaseState &
8502 (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8503 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8504 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8505 lease_change_type = OPLOCK_WRITE_TO_NONE;
8506 else
8507 lease_change_type = OPLOCK_READ_TO_NONE;
8508 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8509 le32_to_cpu(lease->state),
8510 le32_to_cpu(req->LeaseState));
8511 } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8512 req->LeaseState != SMB2_LEASE_NONE_LE) {
8513 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8514 lease_change_type = OPLOCK_READ_TO_NONE;
8515 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8516 le32_to_cpu(lease->state),
8517 le32_to_cpu(req->LeaseState));
8518 } else {
8519 /* valid lease state changes */
8520 err = STATUS_INVALID_DEVICE_STATE;
8521 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8522 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8523 lease_change_type = OPLOCK_WRITE_TO_NONE;
8524 else
8525 lease_change_type = OPLOCK_READ_TO_NONE;
8526 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8527 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8528 lease_change_type = OPLOCK_WRITE_TO_READ;
8529 else
8530 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8531 } else {
8532 lease_change_type = 0;
8533 }
8534 }
8535
8536 switch (lease_change_type) {
8537 case OPLOCK_WRITE_TO_READ:
8538 ret = opinfo_write_to_read(opinfo);
8539 break;
8540 case OPLOCK_READ_HANDLE_TO_READ:
8541 ret = opinfo_read_handle_to_read(opinfo);
8542 break;
8543 case OPLOCK_WRITE_TO_NONE:
8544 ret = opinfo_write_to_none(opinfo);
8545 break;
8546 case OPLOCK_READ_TO_NONE:
8547 ret = opinfo_read_to_none(opinfo);
8548 break;
8549 default:
8550 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8551 le32_to_cpu(lease->state),
8552 le32_to_cpu(req->LeaseState));
8553 }
8554
8555 if (ret < 0) {
8556 rsp->hdr.Status = err;
8557 goto err_out;
8558 }
8559
8560 lease_state = lease->state;
8561 opinfo->op_state = OPLOCK_STATE_NONE;
8562 wake_up_interruptible_all(&opinfo->oplock_q);
8563 atomic_dec(&opinfo->breaking_cnt);
8564 wake_up_interruptible_all(&opinfo->oplock_brk);
8565 opinfo_put(opinfo);
8566
8567 rsp->StructureSize = cpu_to_le16(36);
8568 rsp->Reserved = 0;
8569 rsp->Flags = 0;
8570 memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8571 rsp->LeaseState = lease_state;
8572 rsp->LeaseDuration = 0;
8573 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack));
8574 if (!ret)
8575 return;
8576
8577 err_out:
8578 wake_up_interruptible_all(&opinfo->oplock_q);
8579 atomic_dec(&opinfo->breaking_cnt);
8580 wake_up_interruptible_all(&opinfo->oplock_brk);
8581
8582 opinfo_put(opinfo);
8583 smb2_set_err_rsp(work);
8584 }
8585
8586 /**
8587 * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8588 * @work: smb work containing oplock/lease break command buffer
8589 *
8590 * Return: 0
8591 */
8592 int smb2_oplock_break(struct ksmbd_work *work)
8593 {
8594 struct smb2_oplock_break *req;
8595 struct smb2_oplock_break *rsp;
8596
8597 WORK_BUFFERS(work, req, rsp);
8598
8599 switch (le16_to_cpu(req->StructureSize)) {
8600 case OP_BREAK_STRUCT_SIZE_20:
8601 smb20_oplock_break_ack(work);
8602 break;
8603 case OP_BREAK_STRUCT_SIZE_21:
8604 smb21_lease_break_ack(work);
8605 break;
8606 default:
8607 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8608 le16_to_cpu(req->StructureSize));
8609 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8610 smb2_set_err_rsp(work);
8611 }
8612
8613 return 0;
8614 }
8615
8616 /**
8617 * smb2_notify() - handler for smb2 notify request
8618 * @work: smb work containing notify command buffer
8619 *
8620 * Return: 0
8621 */
8622 int smb2_notify(struct ksmbd_work *work)
8623 {
8624 struct smb2_change_notify_req *req;
8625 struct smb2_change_notify_rsp *rsp;
8626
8627 WORK_BUFFERS(work, req, rsp);
8628
8629 if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8630 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8631 smb2_set_err_rsp(work);
8632 return 0;
8633 }
8634
8635 smb2_set_err_rsp(work);
8636 rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8637 return 0;
8638 }
8639
8640 /**
8641 * smb2_is_sign_req() - handler for checking packet signing status
8642 * @work: smb work containing notify command buffer
8643 * @command: SMB2 command id
8644 *
8645 * Return: true if packed is signed, false otherwise
8646 */
8647 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8648 {
8649 struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8650
8651 if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8652 command != SMB2_NEGOTIATE_HE &&
8653 command != SMB2_SESSION_SETUP_HE &&
8654 command != SMB2_OPLOCK_BREAK_HE)
8655 return true;
8656
8657 return false;
8658 }
8659
8660 /**
8661 * smb2_check_sign_req() - handler for req packet sign processing
8662 * @work: smb work containing notify command buffer
8663 *
8664 * Return: 1 on success, 0 otherwise
8665 */
8666 int smb2_check_sign_req(struct ksmbd_work *work)
8667 {
8668 struct smb2_hdr *hdr;
8669 char signature_req[SMB2_SIGNATURE_SIZE];
8670 char signature[SMB2_HMACSHA256_SIZE];
8671 struct kvec iov[1];
8672 size_t len;
8673
8674 hdr = smb2_get_msg(work->request_buf);
8675 if (work->next_smb2_rcv_hdr_off)
8676 hdr = ksmbd_req_buf_next(work);
8677
8678 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8679 len = get_rfc1002_len(work->request_buf);
8680 else if (hdr->NextCommand)
8681 len = le32_to_cpu(hdr->NextCommand);
8682 else
8683 len = get_rfc1002_len(work->request_buf) -
8684 work->next_smb2_rcv_hdr_off;
8685
8686 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8687 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8688
8689 iov[0].iov_base = (char *)&hdr->ProtocolId;
8690 iov[0].iov_len = len;
8691
8692 if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8693 signature))
8694 return 0;
8695
8696 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8697 pr_err("bad smb2 signature\n");
8698 return 0;
8699 }
8700
8701 return 1;
8702 }
8703
8704 /**
8705 * smb2_set_sign_rsp() - handler for rsp packet sign processing
8706 * @work: smb work containing notify command buffer
8707 *
8708 */
8709 void smb2_set_sign_rsp(struct ksmbd_work *work)
8710 {
8711 struct smb2_hdr *hdr;
8712 char signature[SMB2_HMACSHA256_SIZE];
8713 struct kvec *iov;
8714 int n_vec = 1;
8715
8716 hdr = ksmbd_resp_buf_curr(work);
8717 hdr->Flags |= SMB2_FLAGS_SIGNED;
8718 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8719
8720 if (hdr->Command == SMB2_READ) {
8721 iov = &work->iov[work->iov_idx - 1];
8722 n_vec++;
8723 } else {
8724 iov = &work->iov[work->iov_idx];
8725 }
8726
8727 if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8728 signature))
8729 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8730 }
8731
8732 /**
8733 * smb3_check_sign_req() - handler for req packet sign processing
8734 * @work: smb work containing notify command buffer
8735 *
8736 * Return: 1 on success, 0 otherwise
8737 */
8738 int smb3_check_sign_req(struct ksmbd_work *work)
8739 {
8740 struct ksmbd_conn *conn = work->conn;
8741 char *signing_key;
8742 struct smb2_hdr *hdr;
8743 struct channel *chann;
8744 char signature_req[SMB2_SIGNATURE_SIZE];
8745 char signature[SMB2_CMACAES_SIZE];
8746 struct kvec iov[1];
8747 size_t len;
8748
8749 hdr = smb2_get_msg(work->request_buf);
8750 if (work->next_smb2_rcv_hdr_off)
8751 hdr = ksmbd_req_buf_next(work);
8752
8753 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8754 len = get_rfc1002_len(work->request_buf);
8755 else if (hdr->NextCommand)
8756 len = le32_to_cpu(hdr->NextCommand);
8757 else
8758 len = get_rfc1002_len(work->request_buf) -
8759 work->next_smb2_rcv_hdr_off;
8760
8761 if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8762 signing_key = work->sess->smb3signingkey;
8763 } else {
8764 chann = lookup_chann_list(work->sess, conn);
8765 if (!chann) {
8766 return 0;
8767 }
8768 signing_key = chann->smb3signingkey;
8769 }
8770
8771 if (!signing_key) {
8772 pr_err("SMB3 signing key is not generated\n");
8773 return 0;
8774 }
8775
8776 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8777 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8778 iov[0].iov_base = (char *)&hdr->ProtocolId;
8779 iov[0].iov_len = len;
8780
8781 if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8782 return 0;
8783
8784 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8785 pr_err("bad smb2 signature\n");
8786 return 0;
8787 }
8788
8789 return 1;
8790 }
8791
8792 /**
8793 * smb3_set_sign_rsp() - handler for rsp packet sign processing
8794 * @work: smb work containing notify command buffer
8795 *
8796 */
8797 void smb3_set_sign_rsp(struct ksmbd_work *work)
8798 {
8799 struct ksmbd_conn *conn = work->conn;
8800 struct smb2_hdr *hdr;
8801 struct channel *chann;
8802 char signature[SMB2_CMACAES_SIZE];
8803 struct kvec *iov;
8804 int n_vec = 1;
8805 char *signing_key;
8806
8807 hdr = ksmbd_resp_buf_curr(work);
8808
8809 if (conn->binding == false &&
8810 le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8811 signing_key = work->sess->smb3signingkey;
8812 } else {
8813 chann = lookup_chann_list(work->sess, work->conn);
8814 if (!chann) {
8815 return;
8816 }
8817 signing_key = chann->smb3signingkey;
8818 }
8819
8820 if (!signing_key)
8821 return;
8822
8823 hdr->Flags |= SMB2_FLAGS_SIGNED;
8824 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8825
8826 if (hdr->Command == SMB2_READ) {
8827 iov = &work->iov[work->iov_idx - 1];
8828 n_vec++;
8829 } else {
8830 iov = &work->iov[work->iov_idx];
8831 }
8832
8833 if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec,
8834 signature))
8835 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8836 }
8837
8838 /**
8839 * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8840 * @work: smb work containing response buffer
8841 *
8842 */
8843 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8844 {
8845 struct ksmbd_conn *conn = work->conn;
8846 struct ksmbd_session *sess = work->sess;
8847 struct smb2_hdr *req, *rsp;
8848
8849 if (conn->dialect != SMB311_PROT_ID)
8850 return;
8851
8852 WORK_BUFFERS(work, req, rsp);
8853
8854 if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8855 conn->preauth_info)
8856 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8857 conn->preauth_info->Preauth_HashValue);
8858
8859 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8860 __u8 *hash_value;
8861
8862 if (conn->binding) {
8863 struct preauth_session *preauth_sess;
8864
8865 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8866 if (!preauth_sess)
8867 return;
8868 hash_value = preauth_sess->Preauth_HashValue;
8869 } else {
8870 hash_value = sess->Preauth_HashValue;
8871 if (!hash_value)
8872 return;
8873 }
8874 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8875 hash_value);
8876 }
8877 }
8878
8879 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
8880 {
8881 struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
8882 struct smb2_hdr *hdr = smb2_get_msg(old_buf);
8883 unsigned int orig_len = get_rfc1002_len(old_buf);
8884
8885 /* tr_buf must be cleared by the caller */
8886 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8887 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8888 tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
8889 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8890 cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8891 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8892 else
8893 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8894 memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8895 inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
8896 inc_rfc1001_len(tr_buf, orig_len);
8897 }
8898
8899 int smb3_encrypt_resp(struct ksmbd_work *work)
8900 {
8901 struct kvec *iov = work->iov;
8902 int rc = -ENOMEM;
8903 void *tr_buf;
8904
8905 tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
8906 if (!tr_buf)
8907 return rc;
8908
8909 /* fill transform header */
8910 fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type);
8911
8912 iov[0].iov_base = tr_buf;
8913 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8914 work->tr_buf = tr_buf;
8915
8916 return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1);
8917 }
8918
8919 bool smb3_is_transform_hdr(void *buf)
8920 {
8921 struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
8922
8923 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8924 }
8925
8926 int smb3_decrypt_req(struct ksmbd_work *work)
8927 {
8928 struct ksmbd_session *sess;
8929 char *buf = work->request_buf;
8930 unsigned int pdu_length = get_rfc1002_len(buf);
8931 struct kvec iov[2];
8932 int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
8933 struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
8934 int rc = 0;
8935
8936 if (pdu_length < sizeof(struct smb2_transform_hdr) ||
8937 buf_data_size < sizeof(struct smb2_hdr)) {
8938 pr_err("Transform message is too small (%u)\n",
8939 pdu_length);
8940 return -ECONNABORTED;
8941 }
8942
8943 if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8944 pr_err("Transform message is broken\n");
8945 return -ECONNABORTED;
8946 }
8947
8948 sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
8949 if (!sess) {
8950 pr_err("invalid session id(%llx) in transform header\n",
8951 le64_to_cpu(tr_hdr->SessionId));
8952 return -ECONNABORTED;
8953 }
8954
8955 iov[0].iov_base = buf;
8956 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8957 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
8958 iov[1].iov_len = buf_data_size;
8959 rc = ksmbd_crypt_message(work, iov, 2, 0);
8960 if (rc)
8961 return rc;
8962
8963 memmove(buf + 4, iov[1].iov_base, buf_data_size);
8964 *(__be32 *)buf = cpu_to_be32(buf_data_size);
8965
8966 return rc;
8967 }
8968
8969 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8970 {
8971 struct ksmbd_conn *conn = work->conn;
8972 struct ksmbd_session *sess = work->sess;
8973 struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
8974
8975 if (conn->dialect < SMB30_PROT_ID)
8976 return false;
8977
8978 if (work->next_smb2_rcv_hdr_off)
8979 rsp = ksmbd_resp_buf_next(work);
8980
8981 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8982 sess->user && !user_guest(sess->user) &&
8983 rsp->Status == STATUS_SUCCESS)
8984 return true;
8985 return false;
8986 }
Kernel DRM miscellaneous fixes and cross-tree changes