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usb: dwc3: replace %p with %pK
[linux/fpc-iii.git] / fs / cifs / smb2ops.c
blob7e48561abd299012616428d28f256906a7c5381f
1 /*
2 * SMB2 version specific operations
3 *
4 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
5 *
6 * This library is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License v2 as published
8 * by the Free Software Foundation.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public License
16 * along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20 #include <linux/pagemap.h>
21 #include <linux/vfs.h>
22 #include <linux/falloc.h>
23 #include <linux/scatterlist.h>
24 #include <linux/uuid.h>
25 #include <crypto/aead.h>
26 #include "cifsglob.h"
27 #include "smb2pdu.h"
28 #include "smb2proto.h"
29 #include "cifsproto.h"
30 #include "cifs_debug.h"
31 #include "cifs_unicode.h"
32 #include "smb2status.h"
33 #include "smb2glob.h"
34 #include "cifs_ioctl.h"
35
36 static int
37 change_conf(struct TCP_Server_Info *server)
38 {
39 server->credits += server->echo_credits + server->oplock_credits;
40 server->oplock_credits = server->echo_credits = 0;
41 switch (server->credits) {
42 case 0:
43 return -1;
44 case 1:
45 server->echoes = false;
46 server->oplocks = false;
47 cifs_dbg(VFS, "disabling echoes and oplocks\n");
48 break;
49 case 2:
50 server->echoes = true;
51 server->oplocks = false;
52 server->echo_credits = 1;
53 cifs_dbg(FYI, "disabling oplocks\n");
54 break;
55 default:
56 server->echoes = true;
57 if (enable_oplocks) {
58 server->oplocks = true;
59 server->oplock_credits = 1;
60 } else
61 server->oplocks = false;
62
63 server->echo_credits = 1;
64 }
65 server->credits -= server->echo_credits + server->oplock_credits;
66 return 0;
67 }
68
69 static void
70 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
71 const int optype)
72 {
73 int *val, rc = 0;
74 spin_lock(&server->req_lock);
75 val = server->ops->get_credits_field(server, optype);
76 *val += add;
77 if (*val > 65000) {
78 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
79 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
80 }
81 server->in_flight--;
82 if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
83 rc = change_conf(server);
84 /*
85 * Sometimes server returns 0 credits on oplock break ack - we need to
86 * rebalance credits in this case.
87 */
88 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
89 server->oplocks) {
90 if (server->credits > 1) {
91 server->credits--;
92 server->oplock_credits++;
93 }
94 }
95 spin_unlock(&server->req_lock);
96 wake_up(&server->request_q);
97 if (rc)
98 cifs_reconnect(server);
99 }
100
101 static void
102 smb2_set_credits(struct TCP_Server_Info *server, const int val)
103 {
104 spin_lock(&server->req_lock);
105 server->credits = val;
106 spin_unlock(&server->req_lock);
107 }
108
109 static int *
110 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
111 {
112 switch (optype) {
113 case CIFS_ECHO_OP:
114 return &server->echo_credits;
115 case CIFS_OBREAK_OP:
116 return &server->oplock_credits;
117 default:
118 return &server->credits;
119 }
120 }
121
122 static unsigned int
123 smb2_get_credits(struct mid_q_entry *mid)
124 {
125 struct smb2_sync_hdr *shdr = get_sync_hdr(mid->resp_buf);
126
127 return le16_to_cpu(shdr->CreditRequest);
128 }
129
130 static int
131 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
132 unsigned int *num, unsigned int *credits)
133 {
134 int rc = 0;
135 unsigned int scredits;
136
137 spin_lock(&server->req_lock);
138 while (1) {
139 if (server->credits <= 0) {
140 spin_unlock(&server->req_lock);
141 cifs_num_waiters_inc(server);
142 rc = wait_event_killable(server->request_q,
143 has_credits(server, &server->credits));
144 cifs_num_waiters_dec(server);
145 if (rc)
146 return rc;
147 spin_lock(&server->req_lock);
148 } else {
149 if (server->tcpStatus == CifsExiting) {
150 spin_unlock(&server->req_lock);
151 return -ENOENT;
152 }
153
154 scredits = server->credits;
155 /* can deadlock with reopen */
156 if (scredits == 1) {
157 *num = SMB2_MAX_BUFFER_SIZE;
158 *credits = 0;
159 break;
160 }
161
162 /* leave one credit for a possible reopen */
163 scredits--;
164 *num = min_t(unsigned int, size,
165 scredits * SMB2_MAX_BUFFER_SIZE);
166
167 *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
168 server->credits -= *credits;
169 server->in_flight++;
170 break;
171 }
172 }
173 spin_unlock(&server->req_lock);
174 return rc;
175 }
176
177 static __u64
178 smb2_get_next_mid(struct TCP_Server_Info *server)
179 {
180 __u64 mid;
181 /* for SMB2 we need the current value */
182 spin_lock(&GlobalMid_Lock);
183 mid = server->CurrentMid++;
184 spin_unlock(&GlobalMid_Lock);
185 return mid;
186 }
187
188 static struct mid_q_entry *
189 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
190 {
191 struct mid_q_entry *mid;
192 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
193 __u64 wire_mid = le64_to_cpu(shdr->MessageId);
194
195 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
196 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
197 return NULL;
198 }
199
200 spin_lock(&GlobalMid_Lock);
201 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
202 if ((mid->mid == wire_mid) &&
203 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
204 (mid->command == shdr->Command)) {
205 spin_unlock(&GlobalMid_Lock);
206 return mid;
207 }
208 }
209 spin_unlock(&GlobalMid_Lock);
210 return NULL;
211 }
212
213 static void
214 smb2_dump_detail(void *buf)
215 {
216 #ifdef CONFIG_CIFS_DEBUG2
217 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
218
219 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
220 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
221 shdr->ProcessId);
222 cifs_dbg(VFS, "smb buf %p len %u\n", buf, smb2_calc_size(buf));
223 #endif
224 }
225
226 static bool
227 smb2_need_neg(struct TCP_Server_Info *server)
228 {
229 return server->max_read == 0;
230 }
231
232 static int
233 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
234 {
235 int rc;
236 ses->server->CurrentMid = 0;
237 rc = SMB2_negotiate(xid, ses);
238 /* BB we probably don't need to retry with modern servers */
239 if (rc == -EAGAIN)
240 rc = -EHOSTDOWN;
241 return rc;
242 }
243
244 static unsigned int
245 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
246 {
247 struct TCP_Server_Info *server = tcon->ses->server;
248 unsigned int wsize;
249
250 /* start with specified wsize, or default */
251 wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
252 wsize = min_t(unsigned int, wsize, server->max_write);
253
254 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
255 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
256
257 return wsize;
258 }
259
260 static unsigned int
261 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
262 {
263 struct TCP_Server_Info *server = tcon->ses->server;
264 unsigned int rsize;
265
266 /* start with specified rsize, or default */
267 rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
268 rsize = min_t(unsigned int, rsize, server->max_read);
269
270 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
271 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
272
273 return rsize;
274 }
275
276 #ifdef CONFIG_CIFS_STATS2
277 static int
278 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
279 {
280 int rc;
281 unsigned int ret_data_len = 0;
282 struct network_interface_info_ioctl_rsp *out_buf;
283
284 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
285 FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
286 false /* use_ipc */,
287 NULL /* no data input */, 0 /* no data input */,
288 (char **)&out_buf, &ret_data_len);
289 if (rc != 0)
290 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
291 else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
292 cifs_dbg(VFS, "server returned bad net interface info buf\n");
293 rc = -EINVAL;
294 } else {
295 /* Dump info on first interface */
296 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
297 le32_to_cpu(out_buf->Capability));
298 cifs_dbg(FYI, "Link Speed %lld\n",
299 le64_to_cpu(out_buf->LinkSpeed));
300 }
301 kfree(out_buf);
302 return rc;
303 }
304 #endif /* STATS2 */
305
306 static void
307 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
308 {
309 int rc;
310 __le16 srch_path = 0; /* Null - open root of share */
311 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
312 struct cifs_open_parms oparms;
313 struct cifs_fid fid;
314
315 oparms.tcon = tcon;
316 oparms.desired_access = FILE_READ_ATTRIBUTES;
317 oparms.disposition = FILE_OPEN;
318 oparms.create_options = 0;
319 oparms.fid = &fid;
320 oparms.reconnect = false;
321
322 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
323 if (rc)
324 return;
325
326 #ifdef CONFIG_CIFS_STATS2
327 SMB3_request_interfaces(xid, tcon);
328 #endif /* STATS2 */
329
330 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
331 FS_ATTRIBUTE_INFORMATION);
332 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
333 FS_DEVICE_INFORMATION);
334 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
335 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
336 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
337 return;
338 }
339
340 static void
341 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
342 {
343 int rc;
344 __le16 srch_path = 0; /* Null - open root of share */
345 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
346 struct cifs_open_parms oparms;
347 struct cifs_fid fid;
348
349 oparms.tcon = tcon;
350 oparms.desired_access = FILE_READ_ATTRIBUTES;
351 oparms.disposition = FILE_OPEN;
352 oparms.create_options = 0;
353 oparms.fid = &fid;
354 oparms.reconnect = false;
355
356 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
357 if (rc)
358 return;
359
360 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
361 FS_ATTRIBUTE_INFORMATION);
362 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
363 FS_DEVICE_INFORMATION);
364 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
365 return;
366 }
367
368 static int
369 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
370 struct cifs_sb_info *cifs_sb, const char *full_path)
371 {
372 int rc;
373 __le16 *utf16_path;
374 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
375 struct cifs_open_parms oparms;
376 struct cifs_fid fid;
377
378 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
379 if (!utf16_path)
380 return -ENOMEM;
381
382 oparms.tcon = tcon;
383 oparms.desired_access = FILE_READ_ATTRIBUTES;
384 oparms.disposition = FILE_OPEN;
385 oparms.create_options = 0;
386 oparms.fid = &fid;
387 oparms.reconnect = false;
388
389 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
390 if (rc) {
391 kfree(utf16_path);
392 return rc;
393 }
394
395 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
396 kfree(utf16_path);
397 return rc;
398 }
399
400 static int
401 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
402 struct cifs_sb_info *cifs_sb, const char *full_path,
403 u64 *uniqueid, FILE_ALL_INFO *data)
404 {
405 *uniqueid = le64_to_cpu(data->IndexNumber);
406 return 0;
407 }
408
409 static int
410 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
411 struct cifs_fid *fid, FILE_ALL_INFO *data)
412 {
413 int rc;
414 struct smb2_file_all_info *smb2_data;
415
416 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
417 GFP_KERNEL);
418 if (smb2_data == NULL)
419 return -ENOMEM;
420
421 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
422 smb2_data);
423 if (!rc)
424 move_smb2_info_to_cifs(data, smb2_data);
425 kfree(smb2_data);
426 return rc;
427 }
428
429 static bool
430 smb2_can_echo(struct TCP_Server_Info *server)
431 {
432 return server->echoes;
433 }
434
435 static void
436 smb2_clear_stats(struct cifs_tcon *tcon)
437 {
438 #ifdef CONFIG_CIFS_STATS
439 int i;
440 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
441 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
442 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
443 }
444 #endif
445 }
446
447 static void
448 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
449 {
450 seq_puts(m, "\n\tShare Capabilities:");
451 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
452 seq_puts(m, " DFS,");
453 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
454 seq_puts(m, " CONTINUOUS AVAILABILITY,");
455 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
456 seq_puts(m, " SCALEOUT,");
457 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
458 seq_puts(m, " CLUSTER,");
459 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
460 seq_puts(m, " ASYMMETRIC,");
461 if (tcon->capabilities == 0)
462 seq_puts(m, " None");
463 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
464 seq_puts(m, " Aligned,");
465 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
466 seq_puts(m, " Partition Aligned,");
467 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
468 seq_puts(m, " SSD,");
469 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
470 seq_puts(m, " TRIM-support,");
471
472 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
473 if (tcon->perf_sector_size)
474 seq_printf(m, "\tOptimal sector size: 0x%x",
475 tcon->perf_sector_size);
476 }
477
478 static void
479 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
480 {
481 #ifdef CONFIG_CIFS_STATS
482 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
483 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
484 seq_printf(m, "\nNegotiates: %d sent %d failed",
485 atomic_read(&sent[SMB2_NEGOTIATE_HE]),
486 atomic_read(&failed[SMB2_NEGOTIATE_HE]));
487 seq_printf(m, "\nSessionSetups: %d sent %d failed",
488 atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
489 atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
490 seq_printf(m, "\nLogoffs: %d sent %d failed",
491 atomic_read(&sent[SMB2_LOGOFF_HE]),
492 atomic_read(&failed[SMB2_LOGOFF_HE]));
493 seq_printf(m, "\nTreeConnects: %d sent %d failed",
494 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
495 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
496 seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
497 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
498 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
499 seq_printf(m, "\nCreates: %d sent %d failed",
500 atomic_read(&sent[SMB2_CREATE_HE]),
501 atomic_read(&failed[SMB2_CREATE_HE]));
502 seq_printf(m, "\nCloses: %d sent %d failed",
503 atomic_read(&sent[SMB2_CLOSE_HE]),
504 atomic_read(&failed[SMB2_CLOSE_HE]));
505 seq_printf(m, "\nFlushes: %d sent %d failed",
506 atomic_read(&sent[SMB2_FLUSH_HE]),
507 atomic_read(&failed[SMB2_FLUSH_HE]));
508 seq_printf(m, "\nReads: %d sent %d failed",
509 atomic_read(&sent[SMB2_READ_HE]),
510 atomic_read(&failed[SMB2_READ_HE]));
511 seq_printf(m, "\nWrites: %d sent %d failed",
512 atomic_read(&sent[SMB2_WRITE_HE]),
513 atomic_read(&failed[SMB2_WRITE_HE]));
514 seq_printf(m, "\nLocks: %d sent %d failed",
515 atomic_read(&sent[SMB2_LOCK_HE]),
516 atomic_read(&failed[SMB2_LOCK_HE]));
517 seq_printf(m, "\nIOCTLs: %d sent %d failed",
518 atomic_read(&sent[SMB2_IOCTL_HE]),
519 atomic_read(&failed[SMB2_IOCTL_HE]));
520 seq_printf(m, "\nCancels: %d sent %d failed",
521 atomic_read(&sent[SMB2_CANCEL_HE]),
522 atomic_read(&failed[SMB2_CANCEL_HE]));
523 seq_printf(m, "\nEchos: %d sent %d failed",
524 atomic_read(&sent[SMB2_ECHO_HE]),
525 atomic_read(&failed[SMB2_ECHO_HE]));
526 seq_printf(m, "\nQueryDirectories: %d sent %d failed",
527 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
528 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
529 seq_printf(m, "\nChangeNotifies: %d sent %d failed",
530 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
531 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
532 seq_printf(m, "\nQueryInfos: %d sent %d failed",
533 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
534 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
535 seq_printf(m, "\nSetInfos: %d sent %d failed",
536 atomic_read(&sent[SMB2_SET_INFO_HE]),
537 atomic_read(&failed[SMB2_SET_INFO_HE]));
538 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
539 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
540 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
541 #endif
542 }
543
544 static void
545 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
546 {
547 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
548 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
549
550 cfile->fid.persistent_fid = fid->persistent_fid;
551 cfile->fid.volatile_fid = fid->volatile_fid;
552 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
553 &fid->purge_cache);
554 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
555 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
556 }
557
558 static void
559 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
560 struct cifs_fid *fid)
561 {
562 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
563 }
564
565 static int
566 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
567 u64 persistent_fid, u64 volatile_fid,
568 struct copychunk_ioctl *pcchunk)
569 {
570 int rc;
571 unsigned int ret_data_len;
572 struct resume_key_req *res_key;
573
574 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
575 FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
576 false /* use_ipc */,
577 NULL, 0 /* no input */,
578 (char **)&res_key, &ret_data_len);
579
580 if (rc) {
581 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
582 goto req_res_key_exit;
583 }
584 if (ret_data_len < sizeof(struct resume_key_req)) {
585 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
586 rc = -EINVAL;
587 goto req_res_key_exit;
588 }
589 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
590
591 req_res_key_exit:
592 kfree(res_key);
593 return rc;
594 }
595
596 static ssize_t
597 smb2_copychunk_range(const unsigned int xid,
598 struct cifsFileInfo *srcfile,
599 struct cifsFileInfo *trgtfile, u64 src_off,
600 u64 len, u64 dest_off)
601 {
602 int rc;
603 unsigned int ret_data_len;
604 struct copychunk_ioctl *pcchunk;
605 struct copychunk_ioctl_rsp *retbuf = NULL;
606 struct cifs_tcon *tcon;
607 int chunks_copied = 0;
608 bool chunk_sizes_updated = false;
609 ssize_t bytes_written, total_bytes_written = 0;
610
611 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
612
613 if (pcchunk == NULL)
614 return -ENOMEM;
615
616 cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
617 /* Request a key from the server to identify the source of the copy */
618 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
619 srcfile->fid.persistent_fid,
620 srcfile->fid.volatile_fid, pcchunk);
621
622 /* Note: request_res_key sets res_key null only if rc !=0 */
623 if (rc)
624 goto cchunk_out;
625
626 /* For now array only one chunk long, will make more flexible later */
627 pcchunk->ChunkCount = cpu_to_le32(1);
628 pcchunk->Reserved = 0;
629 pcchunk->Reserved2 = 0;
630
631 tcon = tlink_tcon(trgtfile->tlink);
632
633 while (len > 0) {
634 pcchunk->SourceOffset = cpu_to_le64(src_off);
635 pcchunk->TargetOffset = cpu_to_le64(dest_off);
636 pcchunk->Length =
637 cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
638
639 /* Request server copy to target from src identified by key */
640 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
641 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
642 true /* is_fsctl */, false /* use_ipc */,
643 (char *)pcchunk,
644 sizeof(struct copychunk_ioctl), (char **)&retbuf,
645 &ret_data_len);
646 if (rc == 0) {
647 if (ret_data_len !=
648 sizeof(struct copychunk_ioctl_rsp)) {
649 cifs_dbg(VFS, "invalid cchunk response size\n");
650 rc = -EIO;
651 goto cchunk_out;
652 }
653 if (retbuf->TotalBytesWritten == 0) {
654 cifs_dbg(FYI, "no bytes copied\n");
655 rc = -EIO;
656 goto cchunk_out;
657 }
658 /*
659 * Check if server claimed to write more than we asked
660 */
661 if (le32_to_cpu(retbuf->TotalBytesWritten) >
662 le32_to_cpu(pcchunk->Length)) {
663 cifs_dbg(VFS, "invalid copy chunk response\n");
664 rc = -EIO;
665 goto cchunk_out;
666 }
667 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
668 cifs_dbg(VFS, "invalid num chunks written\n");
669 rc = -EIO;
670 goto cchunk_out;
671 }
672 chunks_copied++;
673
674 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
675 src_off += bytes_written;
676 dest_off += bytes_written;
677 len -= bytes_written;
678 total_bytes_written += bytes_written;
679
680 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
681 le32_to_cpu(retbuf->ChunksWritten),
682 le32_to_cpu(retbuf->ChunkBytesWritten),
683 bytes_written);
684 } else if (rc == -EINVAL) {
685 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
686 goto cchunk_out;
687
688 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
689 le32_to_cpu(retbuf->ChunksWritten),
690 le32_to_cpu(retbuf->ChunkBytesWritten),
691 le32_to_cpu(retbuf->TotalBytesWritten));
692
693 /*
694 * Check if this is the first request using these sizes,
695 * (ie check if copy succeed once with original sizes
696 * and check if the server gave us different sizes after
697 * we already updated max sizes on previous request).
698 * if not then why is the server returning an error now
699 */
700 if ((chunks_copied != 0) || chunk_sizes_updated)
701 goto cchunk_out;
702
703 /* Check that server is not asking us to grow size */
704 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
705 tcon->max_bytes_chunk)
706 tcon->max_bytes_chunk =
707 le32_to_cpu(retbuf->ChunkBytesWritten);
708 else
709 goto cchunk_out; /* server gave us bogus size */
710
711 /* No need to change MaxChunks since already set to 1 */
712 chunk_sizes_updated = true;
713 } else
714 goto cchunk_out;
715 }
716
717 cchunk_out:
718 kfree(pcchunk);
719 kfree(retbuf);
720 if (rc)
721 return rc;
722 else
723 return total_bytes_written;
724 }
725
726 static int
727 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
728 struct cifs_fid *fid)
729 {
730 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
731 }
732
733 static unsigned int
734 smb2_read_data_offset(char *buf)
735 {
736 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
737 return rsp->DataOffset;
738 }
739
740 static unsigned int
741 smb2_read_data_length(char *buf)
742 {
743 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
744 return le32_to_cpu(rsp->DataLength);
745 }
746
747
748 static int
749 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
750 struct cifs_io_parms *parms, unsigned int *bytes_read,
751 char **buf, int *buf_type)
752 {
753 parms->persistent_fid = pfid->persistent_fid;
754 parms->volatile_fid = pfid->volatile_fid;
755 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
756 }
757
758 static int
759 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
760 struct cifs_io_parms *parms, unsigned int *written,
761 struct kvec *iov, unsigned long nr_segs)
762 {
763
764 parms->persistent_fid = pfid->persistent_fid;
765 parms->volatile_fid = pfid->volatile_fid;
766 return SMB2_write(xid, parms, written, iov, nr_segs);
767 }
768
769 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
770 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
771 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
772 {
773 struct cifsInodeInfo *cifsi;
774 int rc;
775
776 cifsi = CIFS_I(inode);
777
778 /* if file already sparse don't bother setting sparse again */
779 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
780 return true; /* already sparse */
781
782 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
783 return true; /* already not sparse */
784
785 /*
786 * Can't check for sparse support on share the usual way via the
787 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
788 * since Samba server doesn't set the flag on the share, yet
789 * supports the set sparse FSCTL and returns sparse correctly
790 * in the file attributes. If we fail setting sparse though we
791 * mark that server does not support sparse files for this share
792 * to avoid repeatedly sending the unsupported fsctl to server
793 * if the file is repeatedly extended.
794 */
795 if (tcon->broken_sparse_sup)
796 return false;
797
798 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
799 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
800 true /* is_fctl */, false /* use_ipc */,
801 &setsparse, 1, NULL, NULL);
802 if (rc) {
803 tcon->broken_sparse_sup = true;
804 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
805 return false;
806 }
807
808 if (setsparse)
809 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
810 else
811 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
812
813 return true;
814 }
815
816 static int
817 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
818 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
819 {
820 __le64 eof = cpu_to_le64(size);
821 struct inode *inode;
822
823 /*
824 * If extending file more than one page make sparse. Many Linux fs
825 * make files sparse by default when extending via ftruncate
826 */
827 inode = d_inode(cfile->dentry);
828
829 if (!set_alloc && (size > inode->i_size + 8192)) {
830 __u8 set_sparse = 1;
831
832 /* whether set sparse succeeds or not, extend the file */
833 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
834 }
835
836 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
837 cfile->fid.volatile_fid, cfile->pid, &eof, false);
838 }
839
840 static int
841 smb2_duplicate_extents(const unsigned int xid,
842 struct cifsFileInfo *srcfile,
843 struct cifsFileInfo *trgtfile, u64 src_off,
844 u64 len, u64 dest_off)
845 {
846 int rc;
847 unsigned int ret_data_len;
848 struct duplicate_extents_to_file dup_ext_buf;
849 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
850
851 /* server fileays advertise duplicate extent support with this flag */
852 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
853 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
854 return -EOPNOTSUPP;
855
856 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
857 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
858 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
859 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
860 dup_ext_buf.ByteCount = cpu_to_le64(len);
861 cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
862 src_off, dest_off, len);
863
864 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
865 if (rc)
866 goto duplicate_extents_out;
867
868 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
869 trgtfile->fid.volatile_fid,
870 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
871 true /* is_fsctl */, false /* use_ipc */,
872 (char *)&dup_ext_buf,
873 sizeof(struct duplicate_extents_to_file),
874 NULL,
875 &ret_data_len);
876
877 if (ret_data_len > 0)
878 cifs_dbg(FYI, "non-zero response length in duplicate extents");
879
880 duplicate_extents_out:
881 return rc;
882 }
883
884 static int
885 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
886 struct cifsFileInfo *cfile)
887 {
888 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
889 cfile->fid.volatile_fid);
890 }
891
892 static int
893 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
894 struct cifsFileInfo *cfile)
895 {
896 struct fsctl_set_integrity_information_req integr_info;
897 unsigned int ret_data_len;
898
899 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
900 integr_info.Flags = 0;
901 integr_info.Reserved = 0;
902
903 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
904 cfile->fid.volatile_fid,
905 FSCTL_SET_INTEGRITY_INFORMATION,
906 true /* is_fsctl */, false /* use_ipc */,
907 (char *)&integr_info,
908 sizeof(struct fsctl_set_integrity_information_req),
909 NULL,
910 &ret_data_len);
911
912 }
913
914 static int
915 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
916 struct cifsFileInfo *cfile, void __user *ioc_buf)
917 {
918 char *retbuf = NULL;
919 unsigned int ret_data_len = 0;
920 int rc;
921 struct smb_snapshot_array snapshot_in;
922
923 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
924 cfile->fid.volatile_fid,
925 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
926 true /* is_fsctl */, false /* use_ipc */,
927 NULL, 0 /* no input data */,
928 (char **)&retbuf,
929 &ret_data_len);
930 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
931 rc, ret_data_len);
932 if (rc)
933 return rc;
934
935 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
936 /* Fixup buffer */
937 if (copy_from_user(&snapshot_in, ioc_buf,
938 sizeof(struct smb_snapshot_array))) {
939 rc = -EFAULT;
940 kfree(retbuf);
941 return rc;
942 }
943 if (snapshot_in.snapshot_array_size < sizeof(struct smb_snapshot_array)) {
944 rc = -ERANGE;
945 kfree(retbuf);
946 return rc;
947 }
948
949 if (ret_data_len > snapshot_in.snapshot_array_size)
950 ret_data_len = snapshot_in.snapshot_array_size;
951
952 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
953 rc = -EFAULT;
954 }
955
956 kfree(retbuf);
957 return rc;
958 }
959
960 static int
961 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
962 const char *path, struct cifs_sb_info *cifs_sb,
963 struct cifs_fid *fid, __u16 search_flags,
964 struct cifs_search_info *srch_inf)
965 {
966 __le16 *utf16_path;
967 int rc;
968 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
969 struct cifs_open_parms oparms;
970
971 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
972 if (!utf16_path)
973 return -ENOMEM;
974
975 oparms.tcon = tcon;
976 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
977 oparms.disposition = FILE_OPEN;
978 oparms.create_options = 0;
979 oparms.fid = fid;
980 oparms.reconnect = false;
981
982 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
983 kfree(utf16_path);
984 if (rc) {
985 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
986 return rc;
987 }
988
989 srch_inf->entries_in_buffer = 0;
990 srch_inf->index_of_last_entry = 0;
991
992 rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
993 fid->volatile_fid, 0, srch_inf);
994 if (rc) {
995 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
996 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
997 }
998 return rc;
999 }
1000
1001 static int
1002 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1003 struct cifs_fid *fid, __u16 search_flags,
1004 struct cifs_search_info *srch_inf)
1005 {
1006 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1007 fid->volatile_fid, 0, srch_inf);
1008 }
1009
1010 static int
1011 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1012 struct cifs_fid *fid)
1013 {
1014 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1015 }
1016
1017 /*
1018 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
1019 * the number of credits and return true. Otherwise - return false.
1020 */
1021 static bool
1022 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1023 {
1024 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
1025
1026 if (shdr->Status != STATUS_PENDING)
1027 return false;
1028
1029 if (!length) {
1030 spin_lock(&server->req_lock);
1031 server->credits += le16_to_cpu(shdr->CreditRequest);
1032 spin_unlock(&server->req_lock);
1033 wake_up(&server->request_q);
1034 }
1035
1036 return true;
1037 }
1038
1039 static int
1040 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1041 struct cifsInodeInfo *cinode)
1042 {
1043 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1044 return SMB2_lease_break(0, tcon, cinode->lease_key,
1045 smb2_get_lease_state(cinode));
1046
1047 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1048 fid->volatile_fid,
1049 CIFS_CACHE_READ(cinode) ? 1 : 0);
1050 }
1051
1052 static int
1053 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1054 struct kstatfs *buf)
1055 {
1056 int rc;
1057 __le16 srch_path = 0; /* Null - open root of share */
1058 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1059 struct cifs_open_parms oparms;
1060 struct cifs_fid fid;
1061
1062 oparms.tcon = tcon;
1063 oparms.desired_access = FILE_READ_ATTRIBUTES;
1064 oparms.disposition = FILE_OPEN;
1065 oparms.create_options = 0;
1066 oparms.fid = &fid;
1067 oparms.reconnect = false;
1068
1069 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
1070 if (rc)
1071 return rc;
1072 buf->f_type = SMB2_MAGIC_NUMBER;
1073 rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1074 buf);
1075 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1076 return rc;
1077 }
1078
1079 static bool
1080 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1081 {
1082 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1083 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1084 }
1085
1086 static int
1087 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1088 __u64 length, __u32 type, int lock, int unlock, bool wait)
1089 {
1090 if (unlock && !lock)
1091 type = SMB2_LOCKFLAG_UNLOCK;
1092 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1093 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1094 current->tgid, length, offset, type, wait);
1095 }
1096
1097 static void
1098 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1099 {
1100 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1101 }
1102
1103 static void
1104 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1105 {
1106 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1107 }
1108
1109 static void
1110 smb2_new_lease_key(struct cifs_fid *fid)
1111 {
1112 generate_random_uuid(fid->lease_key);
1113 }
1114
1115 static int
1116 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
1117 const char *search_name,
1118 struct dfs_info3_param **target_nodes,
1119 unsigned int *num_of_nodes,
1120 const struct nls_table *nls_codepage, int remap)
1121 {
1122 int rc;
1123 __le16 *utf16_path = NULL;
1124 int utf16_path_len = 0;
1125 struct cifs_tcon *tcon;
1126 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
1127 struct get_dfs_referral_rsp *dfs_rsp = NULL;
1128 u32 dfs_req_size = 0, dfs_rsp_size = 0;
1129
1130 cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
1131
1132 /*
1133 * Use any tcon from the current session. Here, the first one.
1134 */
1135 spin_lock(&cifs_tcp_ses_lock);
1136 tcon = list_first_entry_or_null(&ses->tcon_list, struct cifs_tcon,
1137 tcon_list);
1138 if (tcon)
1139 tcon->tc_count++;
1140 spin_unlock(&cifs_tcp_ses_lock);
1141
1142 if (!tcon) {
1143 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
1144 ses);
1145 rc = -ENOTCONN;
1146 goto out;
1147 }
1148
1149 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
1150 &utf16_path_len,
1151 nls_codepage, remap);
1152 if (!utf16_path) {
1153 rc = -ENOMEM;
1154 goto out;
1155 }
1156
1157 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
1158 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
1159 if (!dfs_req) {
1160 rc = -ENOMEM;
1161 goto out;
1162 }
1163
1164 /* Highest DFS referral version understood */
1165 dfs_req->MaxReferralLevel = DFS_VERSION;
1166
1167 /* Path to resolve in an UTF-16 null-terminated string */
1168 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
1169
1170 do {
1171 /* try first with IPC */
1172 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1173 FSCTL_DFS_GET_REFERRALS,
1174 true /* is_fsctl */, true /* use_ipc */,
1175 (char *)dfs_req, dfs_req_size,
1176 (char **)&dfs_rsp, &dfs_rsp_size);
1177 if (rc == -ENOTCONN) {
1178 /* try with normal tcon */
1179 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1180 FSCTL_DFS_GET_REFERRALS,
1181 true /* is_fsctl */, false /*use_ipc*/,
1182 (char *)dfs_req, dfs_req_size,
1183 (char **)&dfs_rsp, &dfs_rsp_size);
1184 }
1185 } while (rc == -EAGAIN);
1186
1187 if (rc) {
1188 cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
1189 goto out;
1190 }
1191
1192 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
1193 num_of_nodes, target_nodes,
1194 nls_codepage, remap, search_name,
1195 true /* is_unicode */);
1196 if (rc) {
1197 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
1198 goto out;
1199 }
1200
1201 out:
1202 if (tcon) {
1203 spin_lock(&cifs_tcp_ses_lock);
1204 tcon->tc_count--;
1205 spin_unlock(&cifs_tcp_ses_lock);
1206 }
1207 kfree(utf16_path);
1208 kfree(dfs_req);
1209 kfree(dfs_rsp);
1210 return rc;
1211 }
1212 #define SMB2_SYMLINK_STRUCT_SIZE \
1213 (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1214
1215 static int
1216 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1217 const char *full_path, char **target_path,
1218 struct cifs_sb_info *cifs_sb)
1219 {
1220 int rc;
1221 __le16 *utf16_path;
1222 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1223 struct cifs_open_parms oparms;
1224 struct cifs_fid fid;
1225 struct smb2_err_rsp *err_buf = NULL;
1226 struct smb2_symlink_err_rsp *symlink;
1227 unsigned int sub_len;
1228 unsigned int sub_offset;
1229 unsigned int print_len;
1230 unsigned int print_offset;
1231
1232 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1233
1234 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1235 if (!utf16_path)
1236 return -ENOMEM;
1237
1238 oparms.tcon = tcon;
1239 oparms.desired_access = FILE_READ_ATTRIBUTES;
1240 oparms.disposition = FILE_OPEN;
1241 oparms.create_options = 0;
1242 oparms.fid = &fid;
1243 oparms.reconnect = false;
1244
1245 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1246
1247 if (!rc || !err_buf) {
1248 kfree(utf16_path);
1249 return -ENOENT;
1250 }
1251
1252 if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1253 get_rfc1002_length(err_buf) + 4 < SMB2_SYMLINK_STRUCT_SIZE) {
1254 kfree(utf16_path);
1255 return -ENOENT;
1256 }
1257
1258 /* open must fail on symlink - reset rc */
1259 rc = 0;
1260 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1261 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1262 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1263 print_len = le16_to_cpu(symlink->PrintNameLength);
1264 print_offset = le16_to_cpu(symlink->PrintNameOffset);
1265
1266 if (get_rfc1002_length(err_buf) + 4 <
1267 SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1268 kfree(utf16_path);
1269 return -ENOENT;
1270 }
1271
1272 if (get_rfc1002_length(err_buf) + 4 <
1273 SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1274 kfree(utf16_path);
1275 return -ENOENT;
1276 }
1277
1278 *target_path = cifs_strndup_from_utf16(
1279 (char *)symlink->PathBuffer + sub_offset,
1280 sub_len, true, cifs_sb->local_nls);
1281 if (!(*target_path)) {
1282 kfree(utf16_path);
1283 return -ENOMEM;
1284 }
1285 convert_delimiter(*target_path, '/');
1286 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1287 kfree(utf16_path);
1288 return rc;
1289 }
1290
1291 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1292 loff_t offset, loff_t len, bool keep_size)
1293 {
1294 struct inode *inode;
1295 struct cifsInodeInfo *cifsi;
1296 struct cifsFileInfo *cfile = file->private_data;
1297 struct file_zero_data_information fsctl_buf;
1298 long rc;
1299 unsigned int xid;
1300
1301 xid = get_xid();
1302
1303 inode = d_inode(cfile->dentry);
1304 cifsi = CIFS_I(inode);
1305
1306 /* if file not oplocked can't be sure whether asking to extend size */
1307 if (!CIFS_CACHE_READ(cifsi))
1308 if (keep_size == false)
1309 return -EOPNOTSUPP;
1310
1311 /*
1312 * Must check if file sparse since fallocate -z (zero range) assumes
1313 * non-sparse allocation
1314 */
1315 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1316 return -EOPNOTSUPP;
1317
1318 /*
1319 * need to make sure we are not asked to extend the file since the SMB3
1320 * fsctl does not change the file size. In the future we could change
1321 * this to zero the first part of the range then set the file size
1322 * which for a non sparse file would zero the newly extended range
1323 */
1324 if (keep_size == false)
1325 if (i_size_read(inode) < offset + len)
1326 return -EOPNOTSUPP;
1327
1328 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1329
1330 fsctl_buf.FileOffset = cpu_to_le64(offset);
1331 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1332
1333 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1334 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1335 true /* is_fctl */, false /* use_ipc */,
1336 (char *)&fsctl_buf,
1337 sizeof(struct file_zero_data_information), NULL, NULL);
1338 free_xid(xid);
1339 return rc;
1340 }
1341
1342 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1343 loff_t offset, loff_t len)
1344 {
1345 struct inode *inode;
1346 struct cifsInodeInfo *cifsi;
1347 struct cifsFileInfo *cfile = file->private_data;
1348 struct file_zero_data_information fsctl_buf;
1349 long rc;
1350 unsigned int xid;
1351 __u8 set_sparse = 1;
1352
1353 xid = get_xid();
1354
1355 inode = d_inode(cfile->dentry);
1356 cifsi = CIFS_I(inode);
1357
1358 /* Need to make file sparse, if not already, before freeing range. */
1359 /* Consider adding equivalent for compressed since it could also work */
1360 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1361 return -EOPNOTSUPP;
1362
1363 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1364
1365 fsctl_buf.FileOffset = cpu_to_le64(offset);
1366 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1367
1368 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1369 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1370 true /* is_fctl */, false /* use_ipc */,
1371 (char *)&fsctl_buf,
1372 sizeof(struct file_zero_data_information), NULL, NULL);
1373 free_xid(xid);
1374 return rc;
1375 }
1376
1377 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1378 loff_t off, loff_t len, bool keep_size)
1379 {
1380 struct inode *inode;
1381 struct cifsInodeInfo *cifsi;
1382 struct cifsFileInfo *cfile = file->private_data;
1383 long rc = -EOPNOTSUPP;
1384 unsigned int xid;
1385
1386 xid = get_xid();
1387
1388 inode = d_inode(cfile->dentry);
1389 cifsi = CIFS_I(inode);
1390
1391 /* if file not oplocked can't be sure whether asking to extend size */
1392 if (!CIFS_CACHE_READ(cifsi))
1393 if (keep_size == false)
1394 return -EOPNOTSUPP;
1395
1396 /*
1397 * Files are non-sparse by default so falloc may be a no-op
1398 * Must check if file sparse. If not sparse, and not extending
1399 * then no need to do anything since file already allocated
1400 */
1401 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1402 if (keep_size == true)
1403 return 0;
1404 /* check if extending file */
1405 else if (i_size_read(inode) >= off + len)
1406 /* not extending file and already not sparse */
1407 return 0;
1408 /* BB: in future add else clause to extend file */
1409 else
1410 return -EOPNOTSUPP;
1411 }
1412
1413 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1414 /*
1415 * Check if falloc starts within first few pages of file
1416 * and ends within a few pages of the end of file to
1417 * ensure that most of file is being forced to be
1418 * fallocated now. If so then setting whole file sparse
1419 * ie potentially making a few extra pages at the beginning
1420 * or end of the file non-sparse via set_sparse is harmless.
1421 */
1422 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1423 return -EOPNOTSUPP;
1424
1425 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1426 }
1427 /* BB: else ... in future add code to extend file and set sparse */
1428
1429
1430 free_xid(xid);
1431 return rc;
1432 }
1433
1434
1435 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1436 loff_t off, loff_t len)
1437 {
1438 /* KEEP_SIZE already checked for by do_fallocate */
1439 if (mode & FALLOC_FL_PUNCH_HOLE)
1440 return smb3_punch_hole(file, tcon, off, len);
1441 else if (mode & FALLOC_FL_ZERO_RANGE) {
1442 if (mode & FALLOC_FL_KEEP_SIZE)
1443 return smb3_zero_range(file, tcon, off, len, true);
1444 return smb3_zero_range(file, tcon, off, len, false);
1445 } else if (mode == FALLOC_FL_KEEP_SIZE)
1446 return smb3_simple_falloc(file, tcon, off, len, true);
1447 else if (mode == 0)
1448 return smb3_simple_falloc(file, tcon, off, len, false);
1449
1450 return -EOPNOTSUPP;
1451 }
1452
1453 static void
1454 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1455 struct cifsInodeInfo *cinode, bool set_level2)
1456 {
1457 if (set_level2)
1458 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1459 0, NULL);
1460 else
1461 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1462 }
1463
1464 static void
1465 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1466 unsigned int epoch, bool *purge_cache)
1467 {
1468 oplock &= 0xFF;
1469 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1470 return;
1471 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1472 cinode->oplock = CIFS_CACHE_RHW_FLG;
1473 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1474 &cinode->vfs_inode);
1475 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1476 cinode->oplock = CIFS_CACHE_RW_FLG;
1477 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1478 &cinode->vfs_inode);
1479 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1480 cinode->oplock = CIFS_CACHE_READ_FLG;
1481 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1482 &cinode->vfs_inode);
1483 } else
1484 cinode->oplock = 0;
1485 }
1486
1487 static void
1488 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1489 unsigned int epoch, bool *purge_cache)
1490 {
1491 char message[5] = {0};
1492
1493 oplock &= 0xFF;
1494 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1495 return;
1496
1497 cinode->oplock = 0;
1498 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1499 cinode->oplock |= CIFS_CACHE_READ_FLG;
1500 strcat(message, "R");
1501 }
1502 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1503 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1504 strcat(message, "H");
1505 }
1506 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1507 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1508 strcat(message, "W");
1509 }
1510 if (!cinode->oplock)
1511 strcat(message, "None");
1512 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1513 &cinode->vfs_inode);
1514 }
1515
1516 static void
1517 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1518 unsigned int epoch, bool *purge_cache)
1519 {
1520 unsigned int old_oplock = cinode->oplock;
1521
1522 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1523
1524 if (purge_cache) {
1525 *purge_cache = false;
1526 if (old_oplock == CIFS_CACHE_READ_FLG) {
1527 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1528 (epoch - cinode->epoch > 0))
1529 *purge_cache = true;
1530 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1531 (epoch - cinode->epoch > 1))
1532 *purge_cache = true;
1533 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1534 (epoch - cinode->epoch > 1))
1535 *purge_cache = true;
1536 else if (cinode->oplock == 0 &&
1537 (epoch - cinode->epoch > 0))
1538 *purge_cache = true;
1539 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1540 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1541 (epoch - cinode->epoch > 0))
1542 *purge_cache = true;
1543 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1544 (epoch - cinode->epoch > 1))
1545 *purge_cache = true;
1546 }
1547 cinode->epoch = epoch;
1548 }
1549 }
1550
1551 static bool
1552 smb2_is_read_op(__u32 oplock)
1553 {
1554 return oplock == SMB2_OPLOCK_LEVEL_II;
1555 }
1556
1557 static bool
1558 smb21_is_read_op(__u32 oplock)
1559 {
1560 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1561 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1562 }
1563
1564 static __le32
1565 map_oplock_to_lease(u8 oplock)
1566 {
1567 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1568 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1569 else if (oplock == SMB2_OPLOCK_LEVEL_II)
1570 return SMB2_LEASE_READ_CACHING;
1571 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1572 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1573 SMB2_LEASE_WRITE_CACHING;
1574 return 0;
1575 }
1576
1577 static char *
1578 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1579 {
1580 struct create_lease *buf;
1581
1582 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1583 if (!buf)
1584 return NULL;
1585
1586 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1587 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1588 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1589
1590 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1591 (struct create_lease, lcontext));
1592 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1593 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1594 (struct create_lease, Name));
1595 buf->ccontext.NameLength = cpu_to_le16(4);
1596 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1597 buf->Name[0] = 'R';
1598 buf->Name[1] = 'q';
1599 buf->Name[2] = 'L';
1600 buf->Name[3] = 's';
1601 return (char *)buf;
1602 }
1603
1604 static char *
1605 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1606 {
1607 struct create_lease_v2 *buf;
1608
1609 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1610 if (!buf)
1611 return NULL;
1612
1613 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1614 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1615 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1616
1617 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1618 (struct create_lease_v2, lcontext));
1619 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1620 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1621 (struct create_lease_v2, Name));
1622 buf->ccontext.NameLength = cpu_to_le16(4);
1623 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1624 buf->Name[0] = 'R';
1625 buf->Name[1] = 'q';
1626 buf->Name[2] = 'L';
1627 buf->Name[3] = 's';
1628 return (char *)buf;
1629 }
1630
1631 static __u8
1632 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1633 {
1634 struct create_lease *lc = (struct create_lease *)buf;
1635
1636 *epoch = 0; /* not used */
1637 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1638 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1639 return le32_to_cpu(lc->lcontext.LeaseState);
1640 }
1641
1642 static __u8
1643 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1644 {
1645 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1646
1647 *epoch = le16_to_cpu(lc->lcontext.Epoch);
1648 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1649 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1650 return le32_to_cpu(lc->lcontext.LeaseState);
1651 }
1652
1653 static unsigned int
1654 smb2_wp_retry_size(struct inode *inode)
1655 {
1656 return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1657 SMB2_MAX_BUFFER_SIZE);
1658 }
1659
1660 static bool
1661 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1662 {
1663 return !cfile->invalidHandle;
1664 }
1665
1666 static void
1667 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, struct smb_rqst *old_rq)
1668 {
1669 struct smb2_sync_hdr *shdr =
1670 (struct smb2_sync_hdr *)old_rq->rq_iov[1].iov_base;
1671 unsigned int orig_len = get_rfc1002_length(old_rq->rq_iov[0].iov_base);
1672
1673 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
1674 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
1675 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
1676 tr_hdr->Flags = cpu_to_le16(0x01);
1677 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
1678 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
1679 inc_rfc1001_len(tr_hdr, sizeof(struct smb2_transform_hdr) - 4);
1680 inc_rfc1001_len(tr_hdr, orig_len);
1681 }
1682
1683 static struct scatterlist *
1684 init_sg(struct smb_rqst *rqst, u8 *sign)
1685 {
1686 unsigned int sg_len = rqst->rq_nvec + rqst->rq_npages + 1;
1687 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 24;
1688 struct scatterlist *sg;
1689 unsigned int i;
1690 unsigned int j;
1691
1692 sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
1693 if (!sg)
1694 return NULL;
1695
1696 sg_init_table(sg, sg_len);
1697 sg_set_buf(&sg[0], rqst->rq_iov[0].iov_base + 24, assoc_data_len);
1698 for (i = 1; i < rqst->rq_nvec; i++)
1699 sg_set_buf(&sg[i], rqst->rq_iov[i].iov_base,
1700 rqst->rq_iov[i].iov_len);
1701 for (j = 0; i < sg_len - 1; i++, j++) {
1702 unsigned int len = (j < rqst->rq_npages - 1) ? rqst->rq_pagesz
1703 : rqst->rq_tailsz;
1704 sg_set_page(&sg[i], rqst->rq_pages[j], len, 0);
1705 }
1706 sg_set_buf(&sg[sg_len - 1], sign, SMB2_SIGNATURE_SIZE);
1707 return sg;
1708 }
1709
1710 struct cifs_crypt_result {
1711 int err;
1712 struct completion completion;
1713 };
1714
1715 static void cifs_crypt_complete(struct crypto_async_request *req, int err)
1716 {
1717 struct cifs_crypt_result *res = req->data;
1718
1719 if (err == -EINPROGRESS)
1720 return;
1721
1722 res->err = err;
1723 complete(&res->completion);
1724 }
1725
1726 static int
1727 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
1728 {
1729 struct cifs_ses *ses;
1730 u8 *ses_enc_key;
1731
1732 spin_lock(&cifs_tcp_ses_lock);
1733 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
1734 if (ses->Suid != ses_id)
1735 continue;
1736 ses_enc_key = enc ? ses->smb3encryptionkey :
1737 ses->smb3decryptionkey;
1738 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
1739 spin_unlock(&cifs_tcp_ses_lock);
1740 return 0;
1741 }
1742 spin_unlock(&cifs_tcp_ses_lock);
1743
1744 return 1;
1745 }
1746 /*
1747 * Encrypt or decrypt @rqst message. @rqst has the following format:
1748 * iov[0] - transform header (associate data),
1749 * iov[1-N] and pages - data to encrypt.
1750 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
1751 * untouched.
1752 */
1753 static int
1754 crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
1755 {
1756 struct smb2_transform_hdr *tr_hdr =
1757 (struct smb2_transform_hdr *)rqst->rq_iov[0].iov_base;
1758 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 24;
1759 int rc = 0;
1760 struct scatterlist *sg;
1761 u8 sign[SMB2_SIGNATURE_SIZE] = {};
1762 u8 key[SMB3_SIGN_KEY_SIZE];
1763 struct aead_request *req;
1764 char *iv;
1765 unsigned int iv_len;
1766 struct cifs_crypt_result result = {0, };
1767 struct crypto_aead *tfm;
1768 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
1769
1770 init_completion(&result.completion);
1771
1772 rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
1773 if (rc) {
1774 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
1775 enc ? "en" : "de");
1776 return 0;
1777 }
1778
1779 rc = smb3_crypto_aead_allocate(server);
1780 if (rc) {
1781 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
1782 return rc;
1783 }
1784
1785 tfm = enc ? server->secmech.ccmaesencrypt :
1786 server->secmech.ccmaesdecrypt;
1787 rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
1788 if (rc) {
1789 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
1790 return rc;
1791 }
1792
1793 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
1794 if (rc) {
1795 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
1796 return rc;
1797 }
1798
1799 req = aead_request_alloc(tfm, GFP_KERNEL);
1800 if (!req) {
1801 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
1802 return -ENOMEM;
1803 }
1804
1805 if (!enc) {
1806 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
1807 crypt_len += SMB2_SIGNATURE_SIZE;
1808 }
1809
1810 sg = init_sg(rqst, sign);
1811 if (!sg) {
1812 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
1813 rc = -ENOMEM;
1814 goto free_req;
1815 }
1816
1817 iv_len = crypto_aead_ivsize(tfm);
1818 iv = kzalloc(iv_len, GFP_KERNEL);
1819 if (!iv) {
1820 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
1821 rc = -ENOMEM;
1822 goto free_sg;
1823 }
1824 iv[0] = 3;
1825 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
1826
1827 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
1828 aead_request_set_ad(req, assoc_data_len);
1829
1830 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
1831 cifs_crypt_complete, &result);
1832
1833 rc = enc ? crypto_aead_encrypt(req) : crypto_aead_decrypt(req);
1834
1835 if (rc == -EINPROGRESS || rc == -EBUSY) {
1836 wait_for_completion(&result.completion);
1837 rc = result.err;
1838 }
1839
1840 if (!rc && enc)
1841 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
1842
1843 kfree(iv);
1844 free_sg:
1845 kfree(sg);
1846 free_req:
1847 kfree(req);
1848 return rc;
1849 }
1850
1851 static int
1852 smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
1853 struct smb_rqst *old_rq)
1854 {
1855 struct kvec *iov;
1856 struct page **pages;
1857 struct smb2_transform_hdr *tr_hdr;
1858 unsigned int npages = old_rq->rq_npages;
1859 int i;
1860 int rc = -ENOMEM;
1861
1862 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
1863 if (!pages)
1864 return rc;
1865
1866 new_rq->rq_pages = pages;
1867 new_rq->rq_npages = old_rq->rq_npages;
1868 new_rq->rq_pagesz = old_rq->rq_pagesz;
1869 new_rq->rq_tailsz = old_rq->rq_tailsz;
1870
1871 for (i = 0; i < npages; i++) {
1872 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
1873 if (!pages[i])
1874 goto err_free_pages;
1875 }
1876
1877 iov = kmalloc_array(old_rq->rq_nvec, sizeof(struct kvec), GFP_KERNEL);
1878 if (!iov)
1879 goto err_free_pages;
1880
1881 /* copy all iovs from the old except the 1st one (rfc1002 length) */
1882 memcpy(&iov[1], &old_rq->rq_iov[1],
1883 sizeof(struct kvec) * (old_rq->rq_nvec - 1));
1884 new_rq->rq_iov = iov;
1885 new_rq->rq_nvec = old_rq->rq_nvec;
1886
1887 tr_hdr = kmalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
1888 if (!tr_hdr)
1889 goto err_free_iov;
1890
1891 /* fill the 1st iov with a transform header */
1892 fill_transform_hdr(tr_hdr, old_rq);
1893 new_rq->rq_iov[0].iov_base = tr_hdr;
1894 new_rq->rq_iov[0].iov_len = sizeof(struct smb2_transform_hdr);
1895
1896 /* copy pages form the old */
1897 for (i = 0; i < npages; i++) {
1898 char *dst = kmap(new_rq->rq_pages[i]);
1899 char *src = kmap(old_rq->rq_pages[i]);
1900 unsigned int len = (i < npages - 1) ? new_rq->rq_pagesz :
1901 new_rq->rq_tailsz;
1902 memcpy(dst, src, len);
1903 kunmap(new_rq->rq_pages[i]);
1904 kunmap(old_rq->rq_pages[i]);
1905 }
1906
1907 rc = crypt_message(server, new_rq, 1);
1908 cifs_dbg(FYI, "encrypt message returned %d", rc);
1909 if (rc)
1910 goto err_free_tr_hdr;
1911
1912 return rc;
1913
1914 err_free_tr_hdr:
1915 kfree(tr_hdr);
1916 err_free_iov:
1917 kfree(iov);
1918 err_free_pages:
1919 for (i = i - 1; i >= 0; i--)
1920 put_page(pages[i]);
1921 kfree(pages);
1922 return rc;
1923 }
1924
1925 static void
1926 smb3_free_transform_rq(struct smb_rqst *rqst)
1927 {
1928 int i = rqst->rq_npages - 1;
1929
1930 for (; i >= 0; i--)
1931 put_page(rqst->rq_pages[i]);
1932 kfree(rqst->rq_pages);
1933 /* free transform header */
1934 kfree(rqst->rq_iov[0].iov_base);
1935 kfree(rqst->rq_iov);
1936 }
1937
1938 static int
1939 smb3_is_transform_hdr(void *buf)
1940 {
1941 struct smb2_transform_hdr *trhdr = buf;
1942
1943 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
1944 }
1945
1946 static int
1947 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
1948 unsigned int buf_data_size, struct page **pages,
1949 unsigned int npages, unsigned int page_data_size)
1950 {
1951 struct kvec iov[2];
1952 struct smb_rqst rqst = {NULL};
1953 struct smb2_hdr *hdr;
1954 int rc;
1955
1956 iov[0].iov_base = buf;
1957 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
1958 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
1959 iov[1].iov_len = buf_data_size;
1960
1961 rqst.rq_iov = iov;
1962 rqst.rq_nvec = 2;
1963 rqst.rq_pages = pages;
1964 rqst.rq_npages = npages;
1965 rqst.rq_pagesz = PAGE_SIZE;
1966 rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
1967
1968 rc = crypt_message(server, &rqst, 0);
1969 cifs_dbg(FYI, "decrypt message returned %d\n", rc);
1970
1971 if (rc)
1972 return rc;
1973
1974 memmove(buf + 4, iov[1].iov_base, buf_data_size);
1975 hdr = (struct smb2_hdr *)buf;
1976 hdr->smb2_buf_length = cpu_to_be32(buf_data_size + page_data_size);
1977 server->total_read = buf_data_size + page_data_size + 4;
1978
1979 return rc;
1980 }
1981
1982 static int
1983 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
1984 unsigned int npages, unsigned int len)
1985 {
1986 int i;
1987 int length;
1988
1989 for (i = 0; i < npages; i++) {
1990 struct page *page = pages[i];
1991 size_t n;
1992
1993 n = len;
1994 if (len >= PAGE_SIZE) {
1995 /* enough data to fill the page */
1996 n = PAGE_SIZE;
1997 len -= n;
1998 } else {
1999 zero_user(page, len, PAGE_SIZE - len);
2000 len = 0;
2001 }
2002 length = cifs_read_page_from_socket(server, page, n);
2003 if (length < 0)
2004 return length;
2005 server->total_read += length;
2006 }
2007
2008 return 0;
2009 }
2010
2011 static int
2012 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
2013 unsigned int cur_off, struct bio_vec **page_vec)
2014 {
2015 struct bio_vec *bvec;
2016 int i;
2017
2018 bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
2019 if (!bvec)
2020 return -ENOMEM;
2021
2022 for (i = 0; i < npages; i++) {
2023 bvec[i].bv_page = pages[i];
2024 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
2025 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
2026 data_size -= bvec[i].bv_len;
2027 }
2028
2029 if (data_size != 0) {
2030 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
2031 kfree(bvec);
2032 return -EIO;
2033 }
2034
2035 *page_vec = bvec;
2036 return 0;
2037 }
2038
2039 static int
2040 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
2041 char *buf, unsigned int buf_len, struct page **pages,
2042 unsigned int npages, unsigned int page_data_size)
2043 {
2044 unsigned int data_offset;
2045 unsigned int data_len;
2046 unsigned int cur_off;
2047 unsigned int cur_page_idx;
2048 unsigned int pad_len;
2049 struct cifs_readdata *rdata = mid->callback_data;
2050 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
2051 struct bio_vec *bvec = NULL;
2052 struct iov_iter iter;
2053 struct kvec iov;
2054 int length;
2055
2056 if (shdr->Command != SMB2_READ) {
2057 cifs_dbg(VFS, "only big read responses are supported\n");
2058 return -ENOTSUPP;
2059 }
2060
2061 if (server->ops->is_status_pending &&
2062 server->ops->is_status_pending(buf, server, 0))
2063 return -1;
2064
2065 rdata->result = server->ops->map_error(buf, false);
2066 if (rdata->result != 0) {
2067 cifs_dbg(FYI, "%s: server returned error %d\n",
2068 __func__, rdata->result);
2069 dequeue_mid(mid, rdata->result);
2070 return 0;
2071 }
2072
2073 data_offset = server->ops->read_data_offset(buf) + 4;
2074 data_len = server->ops->read_data_length(buf);
2075
2076 if (data_offset < server->vals->read_rsp_size) {
2077 /*
2078 * win2k8 sometimes sends an offset of 0 when the read
2079 * is beyond the EOF. Treat it as if the data starts just after
2080 * the header.
2081 */
2082 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
2083 __func__, data_offset);
2084 data_offset = server->vals->read_rsp_size;
2085 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
2086 /* data_offset is beyond the end of smallbuf */
2087 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
2088 __func__, data_offset);
2089 rdata->result = -EIO;
2090 dequeue_mid(mid, rdata->result);
2091 return 0;
2092 }
2093
2094 pad_len = data_offset - server->vals->read_rsp_size;
2095
2096 if (buf_len <= data_offset) {
2097 /* read response payload is in pages */
2098 cur_page_idx = pad_len / PAGE_SIZE;
2099 cur_off = pad_len % PAGE_SIZE;
2100
2101 if (cur_page_idx != 0) {
2102 /* data offset is beyond the 1st page of response */
2103 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
2104 __func__, data_offset);
2105 rdata->result = -EIO;
2106 dequeue_mid(mid, rdata->result);
2107 return 0;
2108 }
2109
2110 if (data_len > page_data_size - pad_len) {
2111 /* data_len is corrupt -- discard frame */
2112 rdata->result = -EIO;
2113 dequeue_mid(mid, rdata->result);
2114 return 0;
2115 }
2116
2117 rdata->result = init_read_bvec(pages, npages, page_data_size,
2118 cur_off, &bvec);
2119 if (rdata->result != 0) {
2120 dequeue_mid(mid, rdata->result);
2121 return 0;
2122 }
2123
2124 iov_iter_bvec(&iter, WRITE | ITER_BVEC, bvec, npages, data_len);
2125 } else if (buf_len >= data_offset + data_len) {
2126 /* read response payload is in buf */
2127 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
2128 iov.iov_base = buf + data_offset;
2129 iov.iov_len = data_len;
2130 iov_iter_kvec(&iter, WRITE | ITER_KVEC, &iov, 1, data_len);
2131 } else {
2132 /* read response payload cannot be in both buf and pages */
2133 WARN_ONCE(1, "buf can not contain only a part of read data");
2134 rdata->result = -EIO;
2135 dequeue_mid(mid, rdata->result);
2136 return 0;
2137 }
2138
2139 /* set up first iov for signature check */
2140 rdata->iov[0].iov_base = buf;
2141 rdata->iov[0].iov_len = 4;
2142 rdata->iov[1].iov_base = buf + 4;
2143 rdata->iov[1].iov_len = server->vals->read_rsp_size - 4;
2144 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
2145 rdata->iov[0].iov_base, server->vals->read_rsp_size);
2146
2147 length = rdata->copy_into_pages(server, rdata, &iter);
2148
2149 kfree(bvec);
2150
2151 if (length < 0)
2152 return length;
2153
2154 dequeue_mid(mid, false);
2155 return length;
2156 }
2157
2158 static int
2159 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2160 {
2161 char *buf = server->smallbuf;
2162 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2163 unsigned int npages;
2164 struct page **pages;
2165 unsigned int len;
2166 unsigned int buflen = get_rfc1002_length(buf) + 4;
2167 int rc;
2168 int i = 0;
2169
2170 len = min_t(unsigned int, buflen, server->vals->read_rsp_size - 4 +
2171 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
2172
2173 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
2174 if (rc < 0)
2175 return rc;
2176 server->total_read += rc;
2177
2178 len = le32_to_cpu(tr_hdr->OriginalMessageSize) + 4 -
2179 server->vals->read_rsp_size;
2180 npages = DIV_ROUND_UP(len, PAGE_SIZE);
2181
2182 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2183 if (!pages) {
2184 rc = -ENOMEM;
2185 goto discard_data;
2186 }
2187
2188 for (; i < npages; i++) {
2189 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2190 if (!pages[i]) {
2191 rc = -ENOMEM;
2192 goto discard_data;
2193 }
2194 }
2195
2196 /* read read data into pages */
2197 rc = read_data_into_pages(server, pages, npages, len);
2198 if (rc)
2199 goto free_pages;
2200
2201 rc = cifs_discard_remaining_data(server);
2202 if (rc)
2203 goto free_pages;
2204
2205 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size - 4,
2206 pages, npages, len);
2207 if (rc)
2208 goto free_pages;
2209
2210 *mid = smb2_find_mid(server, buf);
2211 if (*mid == NULL)
2212 cifs_dbg(FYI, "mid not found\n");
2213 else {
2214 cifs_dbg(FYI, "mid found\n");
2215 (*mid)->decrypted = true;
2216 rc = handle_read_data(server, *mid, buf,
2217 server->vals->read_rsp_size,
2218 pages, npages, len);
2219 }
2220
2221 free_pages:
2222 for (i = i - 1; i >= 0; i--)
2223 put_page(pages[i]);
2224 kfree(pages);
2225 return rc;
2226 discard_data:
2227 cifs_discard_remaining_data(server);
2228 goto free_pages;
2229 }
2230
2231 static int
2232 receive_encrypted_standard(struct TCP_Server_Info *server,
2233 struct mid_q_entry **mid)
2234 {
2235 int length;
2236 char *buf = server->smallbuf;
2237 unsigned int pdu_length = get_rfc1002_length(buf);
2238 unsigned int buf_size;
2239 struct mid_q_entry *mid_entry;
2240
2241 /* switch to large buffer if too big for a small one */
2242 if (pdu_length + 4 > MAX_CIFS_SMALL_BUFFER_SIZE) {
2243 server->large_buf = true;
2244 memcpy(server->bigbuf, buf, server->total_read);
2245 buf = server->bigbuf;
2246 }
2247
2248 /* now read the rest */
2249 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
2250 pdu_length - HEADER_SIZE(server) + 1 + 4);
2251 if (length < 0)
2252 return length;
2253 server->total_read += length;
2254
2255 buf_size = pdu_length + 4 - sizeof(struct smb2_transform_hdr);
2256 length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
2257 if (length)
2258 return length;
2259
2260 mid_entry = smb2_find_mid(server, buf);
2261 if (mid_entry == NULL)
2262 cifs_dbg(FYI, "mid not found\n");
2263 else {
2264 cifs_dbg(FYI, "mid found\n");
2265 mid_entry->decrypted = true;
2266 }
2267
2268 *mid = mid_entry;
2269
2270 if (mid_entry && mid_entry->handle)
2271 return mid_entry->handle(server, mid_entry);
2272
2273 return cifs_handle_standard(server, mid_entry);
2274 }
2275
2276 static int
2277 smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2278 {
2279 char *buf = server->smallbuf;
2280 unsigned int pdu_length = get_rfc1002_length(buf);
2281 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2282 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2283
2284 if (pdu_length + 4 < sizeof(struct smb2_transform_hdr) +
2285 sizeof(struct smb2_sync_hdr)) {
2286 cifs_dbg(VFS, "Transform message is too small (%u)\n",
2287 pdu_length);
2288 cifs_reconnect(server);
2289 wake_up(&server->response_q);
2290 return -ECONNABORTED;
2291 }
2292
2293 if (pdu_length + 4 < orig_len + sizeof(struct smb2_transform_hdr)) {
2294 cifs_dbg(VFS, "Transform message is broken\n");
2295 cifs_reconnect(server);
2296 wake_up(&server->response_q);
2297 return -ECONNABORTED;
2298 }
2299
2300 if (pdu_length + 4 > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
2301 return receive_encrypted_read(server, mid);
2302
2303 return receive_encrypted_standard(server, mid);
2304 }
2305
2306 int
2307 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
2308 {
2309 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
2310
2311 return handle_read_data(server, mid, buf, get_rfc1002_length(buf) + 4,
2312 NULL, 0, 0);
2313 }
2314
2315 struct smb_version_operations smb20_operations = {
2316 .compare_fids = smb2_compare_fids,
2317 .setup_request = smb2_setup_request,
2318 .setup_async_request = smb2_setup_async_request,
2319 .check_receive = smb2_check_receive,
2320 .add_credits = smb2_add_credits,
2321 .set_credits = smb2_set_credits,
2322 .get_credits_field = smb2_get_credits_field,
2323 .get_credits = smb2_get_credits,
2324 .wait_mtu_credits = cifs_wait_mtu_credits,
2325 .get_next_mid = smb2_get_next_mid,
2326 .read_data_offset = smb2_read_data_offset,
2327 .read_data_length = smb2_read_data_length,
2328 .map_error = map_smb2_to_linux_error,
2329 .find_mid = smb2_find_mid,
2330 .check_message = smb2_check_message,
2331 .dump_detail = smb2_dump_detail,
2332 .clear_stats = smb2_clear_stats,
2333 .print_stats = smb2_print_stats,
2334 .is_oplock_break = smb2_is_valid_oplock_break,
2335 .handle_cancelled_mid = smb2_handle_cancelled_mid,
2336 .downgrade_oplock = smb2_downgrade_oplock,
2337 .need_neg = smb2_need_neg,
2338 .negotiate = smb2_negotiate,
2339 .negotiate_wsize = smb2_negotiate_wsize,
2340 .negotiate_rsize = smb2_negotiate_rsize,
2341 .sess_setup = SMB2_sess_setup,
2342 .logoff = SMB2_logoff,
2343 .tree_connect = SMB2_tcon,
2344 .tree_disconnect = SMB2_tdis,
2345 .qfs_tcon = smb2_qfs_tcon,
2346 .is_path_accessible = smb2_is_path_accessible,
2347 .can_echo = smb2_can_echo,
2348 .echo = SMB2_echo,
2349 .query_path_info = smb2_query_path_info,
2350 .get_srv_inum = smb2_get_srv_inum,
2351 .query_file_info = smb2_query_file_info,
2352 .set_path_size = smb2_set_path_size,
2353 .set_file_size = smb2_set_file_size,
2354 .set_file_info = smb2_set_file_info,
2355 .set_compression = smb2_set_compression,
2356 .mkdir = smb2_mkdir,
2357 .mkdir_setinfo = smb2_mkdir_setinfo,
2358 .rmdir = smb2_rmdir,
2359 .unlink = smb2_unlink,
2360 .rename = smb2_rename_path,
2361 .create_hardlink = smb2_create_hardlink,
2362 .query_symlink = smb2_query_symlink,
2363 .query_mf_symlink = smb3_query_mf_symlink,
2364 .create_mf_symlink = smb3_create_mf_symlink,
2365 .open = smb2_open_file,
2366 .set_fid = smb2_set_fid,
2367 .close = smb2_close_file,
2368 .flush = smb2_flush_file,
2369 .async_readv = smb2_async_readv,
2370 .async_writev = smb2_async_writev,
2371 .sync_read = smb2_sync_read,
2372 .sync_write = smb2_sync_write,
2373 .query_dir_first = smb2_query_dir_first,
2374 .query_dir_next = smb2_query_dir_next,
2375 .close_dir = smb2_close_dir,
2376 .calc_smb_size = smb2_calc_size,
2377 .is_status_pending = smb2_is_status_pending,
2378 .oplock_response = smb2_oplock_response,
2379 .queryfs = smb2_queryfs,
2380 .mand_lock = smb2_mand_lock,
2381 .mand_unlock_range = smb2_unlock_range,
2382 .push_mand_locks = smb2_push_mandatory_locks,
2383 .get_lease_key = smb2_get_lease_key,
2384 .set_lease_key = smb2_set_lease_key,
2385 .new_lease_key = smb2_new_lease_key,
2386 .calc_signature = smb2_calc_signature,
2387 .is_read_op = smb2_is_read_op,
2388 .set_oplock_level = smb2_set_oplock_level,
2389 .create_lease_buf = smb2_create_lease_buf,
2390 .parse_lease_buf = smb2_parse_lease_buf,
2391 .copychunk_range = smb2_copychunk_range,
2392 .wp_retry_size = smb2_wp_retry_size,
2393 .dir_needs_close = smb2_dir_needs_close,
2394 .get_dfs_refer = smb2_get_dfs_refer,
2395 .select_sectype = smb2_select_sectype,
2396 };
2397
2398 struct smb_version_operations smb21_operations = {
2399 .compare_fids = smb2_compare_fids,
2400 .setup_request = smb2_setup_request,
2401 .setup_async_request = smb2_setup_async_request,
2402 .check_receive = smb2_check_receive,
2403 .add_credits = smb2_add_credits,
2404 .set_credits = smb2_set_credits,
2405 .get_credits_field = smb2_get_credits_field,
2406 .get_credits = smb2_get_credits,
2407 .wait_mtu_credits = smb2_wait_mtu_credits,
2408 .get_next_mid = smb2_get_next_mid,
2409 .read_data_offset = smb2_read_data_offset,
2410 .read_data_length = smb2_read_data_length,
2411 .map_error = map_smb2_to_linux_error,
2412 .find_mid = smb2_find_mid,
2413 .check_message = smb2_check_message,
2414 .dump_detail = smb2_dump_detail,
2415 .clear_stats = smb2_clear_stats,
2416 .print_stats = smb2_print_stats,
2417 .is_oplock_break = smb2_is_valid_oplock_break,
2418 .handle_cancelled_mid = smb2_handle_cancelled_mid,
2419 .downgrade_oplock = smb2_downgrade_oplock,
2420 .need_neg = smb2_need_neg,
2421 .negotiate = smb2_negotiate,
2422 .negotiate_wsize = smb2_negotiate_wsize,
2423 .negotiate_rsize = smb2_negotiate_rsize,
2424 .sess_setup = SMB2_sess_setup,
2425 .logoff = SMB2_logoff,
2426 .tree_connect = SMB2_tcon,
2427 .tree_disconnect = SMB2_tdis,
2428 .qfs_tcon = smb2_qfs_tcon,
2429 .is_path_accessible = smb2_is_path_accessible,
2430 .can_echo = smb2_can_echo,
2431 .echo = SMB2_echo,
2432 .query_path_info = smb2_query_path_info,
2433 .get_srv_inum = smb2_get_srv_inum,
2434 .query_file_info = smb2_query_file_info,
2435 .set_path_size = smb2_set_path_size,
2436 .set_file_size = smb2_set_file_size,
2437 .set_file_info = smb2_set_file_info,
2438 .set_compression = smb2_set_compression,
2439 .mkdir = smb2_mkdir,
2440 .mkdir_setinfo = smb2_mkdir_setinfo,
2441 .rmdir = smb2_rmdir,
2442 .unlink = smb2_unlink,
2443 .rename = smb2_rename_path,
2444 .create_hardlink = smb2_create_hardlink,
2445 .query_symlink = smb2_query_symlink,
2446 .query_mf_symlink = smb3_query_mf_symlink,
2447 .create_mf_symlink = smb3_create_mf_symlink,
2448 .open = smb2_open_file,
2449 .set_fid = smb2_set_fid,
2450 .close = smb2_close_file,
2451 .flush = smb2_flush_file,
2452 .async_readv = smb2_async_readv,
2453 .async_writev = smb2_async_writev,
2454 .sync_read = smb2_sync_read,
2455 .sync_write = smb2_sync_write,
2456 .query_dir_first = smb2_query_dir_first,
2457 .query_dir_next = smb2_query_dir_next,
2458 .close_dir = smb2_close_dir,
2459 .calc_smb_size = smb2_calc_size,
2460 .is_status_pending = smb2_is_status_pending,
2461 .oplock_response = smb2_oplock_response,
2462 .queryfs = smb2_queryfs,
2463 .mand_lock = smb2_mand_lock,
2464 .mand_unlock_range = smb2_unlock_range,
2465 .push_mand_locks = smb2_push_mandatory_locks,
2466 .get_lease_key = smb2_get_lease_key,
2467 .set_lease_key = smb2_set_lease_key,
2468 .new_lease_key = smb2_new_lease_key,
2469 .calc_signature = smb2_calc_signature,
2470 .is_read_op = smb21_is_read_op,
2471 .set_oplock_level = smb21_set_oplock_level,
2472 .create_lease_buf = smb2_create_lease_buf,
2473 .parse_lease_buf = smb2_parse_lease_buf,
2474 .copychunk_range = smb2_copychunk_range,
2475 .wp_retry_size = smb2_wp_retry_size,
2476 .dir_needs_close = smb2_dir_needs_close,
2477 .enum_snapshots = smb3_enum_snapshots,
2478 .get_dfs_refer = smb2_get_dfs_refer,
2479 .select_sectype = smb2_select_sectype,
2480 };
2481
2482 struct smb_version_operations smb30_operations = {
2483 .compare_fids = smb2_compare_fids,
2484 .setup_request = smb2_setup_request,
2485 .setup_async_request = smb2_setup_async_request,
2486 .check_receive = smb2_check_receive,
2487 .add_credits = smb2_add_credits,
2488 .set_credits = smb2_set_credits,
2489 .get_credits_field = smb2_get_credits_field,
2490 .get_credits = smb2_get_credits,
2491 .wait_mtu_credits = smb2_wait_mtu_credits,
2492 .get_next_mid = smb2_get_next_mid,
2493 .read_data_offset = smb2_read_data_offset,
2494 .read_data_length = smb2_read_data_length,
2495 .map_error = map_smb2_to_linux_error,
2496 .find_mid = smb2_find_mid,
2497 .check_message = smb2_check_message,
2498 .dump_detail = smb2_dump_detail,
2499 .clear_stats = smb2_clear_stats,
2500 .print_stats = smb2_print_stats,
2501 .dump_share_caps = smb2_dump_share_caps,
2502 .is_oplock_break = smb2_is_valid_oplock_break,
2503 .handle_cancelled_mid = smb2_handle_cancelled_mid,
2504 .downgrade_oplock = smb2_downgrade_oplock,
2505 .need_neg = smb2_need_neg,
2506 .negotiate = smb2_negotiate,
2507 .negotiate_wsize = smb2_negotiate_wsize,
2508 .negotiate_rsize = smb2_negotiate_rsize,
2509 .sess_setup = SMB2_sess_setup,
2510 .logoff = SMB2_logoff,
2511 .tree_connect = SMB2_tcon,
2512 .tree_disconnect = SMB2_tdis,
2513 .qfs_tcon = smb3_qfs_tcon,
2514 .is_path_accessible = smb2_is_path_accessible,
2515 .can_echo = smb2_can_echo,
2516 .echo = SMB2_echo,
2517 .query_path_info = smb2_query_path_info,
2518 .get_srv_inum = smb2_get_srv_inum,
2519 .query_file_info = smb2_query_file_info,
2520 .set_path_size = smb2_set_path_size,
2521 .set_file_size = smb2_set_file_size,
2522 .set_file_info = smb2_set_file_info,
2523 .set_compression = smb2_set_compression,
2524 .mkdir = smb2_mkdir,
2525 .mkdir_setinfo = smb2_mkdir_setinfo,
2526 .rmdir = smb2_rmdir,
2527 .unlink = smb2_unlink,
2528 .rename = smb2_rename_path,
2529 .create_hardlink = smb2_create_hardlink,
2530 .query_symlink = smb2_query_symlink,
2531 .query_mf_symlink = smb3_query_mf_symlink,
2532 .create_mf_symlink = smb3_create_mf_symlink,
2533 .open = smb2_open_file,
2534 .set_fid = smb2_set_fid,
2535 .close = smb2_close_file,
2536 .flush = smb2_flush_file,
2537 .async_readv = smb2_async_readv,
2538 .async_writev = smb2_async_writev,
2539 .sync_read = smb2_sync_read,
2540 .sync_write = smb2_sync_write,
2541 .query_dir_first = smb2_query_dir_first,
2542 .query_dir_next = smb2_query_dir_next,
2543 .close_dir = smb2_close_dir,
2544 .calc_smb_size = smb2_calc_size,
2545 .is_status_pending = smb2_is_status_pending,
2546 .oplock_response = smb2_oplock_response,
2547 .queryfs = smb2_queryfs,
2548 .mand_lock = smb2_mand_lock,
2549 .mand_unlock_range = smb2_unlock_range,
2550 .push_mand_locks = smb2_push_mandatory_locks,
2551 .get_lease_key = smb2_get_lease_key,
2552 .set_lease_key = smb2_set_lease_key,
2553 .new_lease_key = smb2_new_lease_key,
2554 .generate_signingkey = generate_smb30signingkey,
2555 .calc_signature = smb3_calc_signature,
2556 .set_integrity = smb3_set_integrity,
2557 .is_read_op = smb21_is_read_op,
2558 .set_oplock_level = smb3_set_oplock_level,
2559 .create_lease_buf = smb3_create_lease_buf,
2560 .parse_lease_buf = smb3_parse_lease_buf,
2561 .copychunk_range = smb2_copychunk_range,
2562 .duplicate_extents = smb2_duplicate_extents,
2563 .validate_negotiate = smb3_validate_negotiate,
2564 .wp_retry_size = smb2_wp_retry_size,
2565 .dir_needs_close = smb2_dir_needs_close,
2566 .fallocate = smb3_fallocate,
2567 .enum_snapshots = smb3_enum_snapshots,
2568 .init_transform_rq = smb3_init_transform_rq,
2569 .free_transform_rq = smb3_free_transform_rq,
2570 .is_transform_hdr = smb3_is_transform_hdr,
2571 .receive_transform = smb3_receive_transform,
2572 .get_dfs_refer = smb2_get_dfs_refer,
2573 .select_sectype = smb2_select_sectype,
2574 };
2575
2576 #ifdef CONFIG_CIFS_SMB311
2577 struct smb_version_operations smb311_operations = {
2578 .compare_fids = smb2_compare_fids,
2579 .setup_request = smb2_setup_request,
2580 .setup_async_request = smb2_setup_async_request,
2581 .check_receive = smb2_check_receive,
2582 .add_credits = smb2_add_credits,
2583 .set_credits = smb2_set_credits,
2584 .get_credits_field = smb2_get_credits_field,
2585 .get_credits = smb2_get_credits,
2586 .wait_mtu_credits = smb2_wait_mtu_credits,
2587 .get_next_mid = smb2_get_next_mid,
2588 .read_data_offset = smb2_read_data_offset,
2589 .read_data_length = smb2_read_data_length,
2590 .map_error = map_smb2_to_linux_error,
2591 .find_mid = smb2_find_mid,
2592 .check_message = smb2_check_message,
2593 .dump_detail = smb2_dump_detail,
2594 .clear_stats = smb2_clear_stats,
2595 .print_stats = smb2_print_stats,
2596 .dump_share_caps = smb2_dump_share_caps,
2597 .is_oplock_break = smb2_is_valid_oplock_break,
2598 .handle_cancelled_mid = smb2_handle_cancelled_mid,
2599 .downgrade_oplock = smb2_downgrade_oplock,
2600 .need_neg = smb2_need_neg,
2601 .negotiate = smb2_negotiate,
2602 .negotiate_wsize = smb2_negotiate_wsize,
2603 .negotiate_rsize = smb2_negotiate_rsize,
2604 .sess_setup = SMB2_sess_setup,
2605 .logoff = SMB2_logoff,
2606 .tree_connect = SMB2_tcon,
2607 .tree_disconnect = SMB2_tdis,
2608 .qfs_tcon = smb3_qfs_tcon,
2609 .is_path_accessible = smb2_is_path_accessible,
2610 .can_echo = smb2_can_echo,
2611 .echo = SMB2_echo,
2612 .query_path_info = smb2_query_path_info,
2613 .get_srv_inum = smb2_get_srv_inum,
2614 .query_file_info = smb2_query_file_info,
2615 .set_path_size = smb2_set_path_size,
2616 .set_file_size = smb2_set_file_size,
2617 .set_file_info = smb2_set_file_info,
2618 .set_compression = smb2_set_compression,
2619 .mkdir = smb2_mkdir,
2620 .mkdir_setinfo = smb2_mkdir_setinfo,
2621 .rmdir = smb2_rmdir,
2622 .unlink = smb2_unlink,
2623 .rename = smb2_rename_path,
2624 .create_hardlink = smb2_create_hardlink,
2625 .query_symlink = smb2_query_symlink,
2626 .query_mf_symlink = smb3_query_mf_symlink,
2627 .create_mf_symlink = smb3_create_mf_symlink,
2628 .open = smb2_open_file,
2629 .set_fid = smb2_set_fid,
2630 .close = smb2_close_file,
2631 .flush = smb2_flush_file,
2632 .async_readv = smb2_async_readv,
2633 .async_writev = smb2_async_writev,
2634 .sync_read = smb2_sync_read,
2635 .sync_write = smb2_sync_write,
2636 .query_dir_first = smb2_query_dir_first,
2637 .query_dir_next = smb2_query_dir_next,
2638 .close_dir = smb2_close_dir,
2639 .calc_smb_size = smb2_calc_size,
2640 .is_status_pending = smb2_is_status_pending,
2641 .oplock_response = smb2_oplock_response,
2642 .queryfs = smb2_queryfs,
2643 .mand_lock = smb2_mand_lock,
2644 .mand_unlock_range = smb2_unlock_range,
2645 .push_mand_locks = smb2_push_mandatory_locks,
2646 .get_lease_key = smb2_get_lease_key,
2647 .set_lease_key = smb2_set_lease_key,
2648 .new_lease_key = smb2_new_lease_key,
2649 .generate_signingkey = generate_smb311signingkey,
2650 .calc_signature = smb3_calc_signature,
2651 .set_integrity = smb3_set_integrity,
2652 .is_read_op = smb21_is_read_op,
2653 .set_oplock_level = smb3_set_oplock_level,
2654 .create_lease_buf = smb3_create_lease_buf,
2655 .parse_lease_buf = smb3_parse_lease_buf,
2656 .copychunk_range = smb2_copychunk_range,
2657 .duplicate_extents = smb2_duplicate_extents,
2658 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
2659 .wp_retry_size = smb2_wp_retry_size,
2660 .dir_needs_close = smb2_dir_needs_close,
2661 .fallocate = smb3_fallocate,
2662 .enum_snapshots = smb3_enum_snapshots,
2663 .init_transform_rq = smb3_init_transform_rq,
2664 .free_transform_rq = smb3_free_transform_rq,
2665 .is_transform_hdr = smb3_is_transform_hdr,
2666 .receive_transform = smb3_receive_transform,
2667 .get_dfs_refer = smb2_get_dfs_refer,
2668 .select_sectype = smb2_select_sectype,
2669 };
2670 #endif /* CIFS_SMB311 */
2671
2672 struct smb_version_values smb20_values = {
2673 .version_string = SMB20_VERSION_STRING,
2674 .protocol_id = SMB20_PROT_ID,
2675 .req_capabilities = 0, /* MBZ */
2676 .large_lock_type = 0,
2677 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
2678 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
2679 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
2680 .header_size = sizeof(struct smb2_hdr),
2681 .max_header_size = MAX_SMB2_HDR_SIZE,
2682 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2683 .lock_cmd = SMB2_LOCK,
2684 .cap_unix = 0,
2685 .cap_nt_find = SMB2_NT_FIND,
2686 .cap_large_files = SMB2_LARGE_FILES,
2687 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
2688 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
2689 .create_lease_size = sizeof(struct create_lease),
2690 };
2691
2692 struct smb_version_values smb21_values = {
2693 .version_string = SMB21_VERSION_STRING,
2694 .protocol_id = SMB21_PROT_ID,
2695 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
2696 .large_lock_type = 0,
2697 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
2698 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
2699 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
2700 .header_size = sizeof(struct smb2_hdr),
2701 .max_header_size = MAX_SMB2_HDR_SIZE,
2702 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2703 .lock_cmd = SMB2_LOCK,
2704 .cap_unix = 0,
2705 .cap_nt_find = SMB2_NT_FIND,
2706 .cap_large_files = SMB2_LARGE_FILES,
2707 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
2708 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
2709 .create_lease_size = sizeof(struct create_lease),
2710 };
2711
2712 struct smb_version_values smb30_values = {
2713 .version_string = SMB30_VERSION_STRING,
2714 .protocol_id = SMB30_PROT_ID,
2715 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
2716 .large_lock_type = 0,
2717 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
2718 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
2719 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
2720 .header_size = sizeof(struct smb2_hdr),
2721 .max_header_size = MAX_SMB2_HDR_SIZE,
2722 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2723 .lock_cmd = SMB2_LOCK,
2724 .cap_unix = 0,
2725 .cap_nt_find = SMB2_NT_FIND,
2726 .cap_large_files = SMB2_LARGE_FILES,
2727 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
2728 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
2729 .create_lease_size = sizeof(struct create_lease_v2),
2730 };
2731
2732 struct smb_version_values smb302_values = {
2733 .version_string = SMB302_VERSION_STRING,
2734 .protocol_id = SMB302_PROT_ID,
2735 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
2736 .large_lock_type = 0,
2737 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
2738 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
2739 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
2740 .header_size = sizeof(struct smb2_hdr),
2741 .max_header_size = MAX_SMB2_HDR_SIZE,
2742 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2743 .lock_cmd = SMB2_LOCK,
2744 .cap_unix = 0,
2745 .cap_nt_find = SMB2_NT_FIND,
2746 .cap_large_files = SMB2_LARGE_FILES,
2747 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
2748 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
2749 .create_lease_size = sizeof(struct create_lease_v2),
2750 };
2751
2752 #ifdef CONFIG_CIFS_SMB311
2753 struct smb_version_values smb311_values = {
2754 .version_string = SMB311_VERSION_STRING,
2755 .protocol_id = SMB311_PROT_ID,
2756 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
2757 .large_lock_type = 0,
2758 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
2759 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
2760 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
2761 .header_size = sizeof(struct smb2_hdr),
2762 .max_header_size = MAX_SMB2_HDR_SIZE,
2763 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2764 .lock_cmd = SMB2_LOCK,
2765 .cap_unix = 0,
2766 .cap_nt_find = SMB2_NT_FIND,
2767 .cap_large_files = SMB2_LARGE_FILES,
2768 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
2769 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
2770 .create_lease_size = sizeof(struct create_lease_v2),
2771 };
2772 #endif /* SMB311 */
Linux with added FPC-III support