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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / fs / cifs / smb2ops.c
blobeb68e2fcc5001825adab93e623990d50895afe59
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 #include "smbdirect.h"
36
37 static int
38 change_conf(struct TCP_Server_Info *server)
39 {
40 server->credits += server->echo_credits + server->oplock_credits;
41 server->oplock_credits = server->echo_credits = 0;
42 switch (server->credits) {
43 case 0:
44 return -1;
45 case 1:
46 server->echoes = false;
47 server->oplocks = false;
48 cifs_dbg(VFS, "disabling echoes and oplocks\n");
49 break;
50 case 2:
51 server->echoes = true;
52 server->oplocks = false;
53 server->echo_credits = 1;
54 cifs_dbg(FYI, "disabling oplocks\n");
55 break;
56 default:
57 server->echoes = true;
58 if (enable_oplocks) {
59 server->oplocks = true;
60 server->oplock_credits = 1;
61 } else
62 server->oplocks = false;
63
64 server->echo_credits = 1;
65 }
66 server->credits -= server->echo_credits + server->oplock_credits;
67 return 0;
68 }
69
70 static void
71 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
72 const int optype)
73 {
74 int *val, rc = 0;
75 spin_lock(&server->req_lock);
76 val = server->ops->get_credits_field(server, optype);
77 *val += add;
78 if (*val > 65000) {
79 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
80 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
81 }
82 server->in_flight--;
83 if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
84 rc = change_conf(server);
85 /*
86 * Sometimes server returns 0 credits on oplock break ack - we need to
87 * rebalance credits in this case.
88 */
89 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
90 server->oplocks) {
91 if (server->credits > 1) {
92 server->credits--;
93 server->oplock_credits++;
94 }
95 }
96 spin_unlock(&server->req_lock);
97 wake_up(&server->request_q);
98 if (rc)
99 cifs_reconnect(server);
100 }
101
102 static void
103 smb2_set_credits(struct TCP_Server_Info *server, const int val)
104 {
105 spin_lock(&server->req_lock);
106 server->credits = val;
107 spin_unlock(&server->req_lock);
108 }
109
110 static int *
111 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
112 {
113 switch (optype) {
114 case CIFS_ECHO_OP:
115 return &server->echo_credits;
116 case CIFS_OBREAK_OP:
117 return &server->oplock_credits;
118 default:
119 return &server->credits;
120 }
121 }
122
123 static unsigned int
124 smb2_get_credits(struct mid_q_entry *mid)
125 {
126 struct smb2_sync_hdr *shdr = get_sync_hdr(mid->resp_buf);
127
128 return le16_to_cpu(shdr->CreditRequest);
129 }
130
131 static int
132 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
133 unsigned int *num, unsigned int *credits)
134 {
135 int rc = 0;
136 unsigned int scredits;
137
138 spin_lock(&server->req_lock);
139 while (1) {
140 if (server->credits <= 0) {
141 spin_unlock(&server->req_lock);
142 cifs_num_waiters_inc(server);
143 rc = wait_event_killable(server->request_q,
144 has_credits(server, &server->credits));
145 cifs_num_waiters_dec(server);
146 if (rc)
147 return rc;
148 spin_lock(&server->req_lock);
149 } else {
150 if (server->tcpStatus == CifsExiting) {
151 spin_unlock(&server->req_lock);
152 return -ENOENT;
153 }
154
155 scredits = server->credits;
156 /* can deadlock with reopen */
157 if (scredits == 1) {
158 *num = SMB2_MAX_BUFFER_SIZE;
159 *credits = 0;
160 break;
161 }
162
163 /* leave one credit for a possible reopen */
164 scredits--;
165 *num = min_t(unsigned int, size,
166 scredits * SMB2_MAX_BUFFER_SIZE);
167
168 *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
169 server->credits -= *credits;
170 server->in_flight++;
171 break;
172 }
173 }
174 spin_unlock(&server->req_lock);
175 return rc;
176 }
177
178 static __u64
179 smb2_get_next_mid(struct TCP_Server_Info *server)
180 {
181 __u64 mid;
182 /* for SMB2 we need the current value */
183 spin_lock(&GlobalMid_Lock);
184 mid = server->CurrentMid++;
185 spin_unlock(&GlobalMid_Lock);
186 return mid;
187 }
188
189 static struct mid_q_entry *
190 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
191 {
192 struct mid_q_entry *mid;
193 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
194 __u64 wire_mid = le64_to_cpu(shdr->MessageId);
195
196 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
197 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
198 return NULL;
199 }
200
201 spin_lock(&GlobalMid_Lock);
202 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
203 if ((mid->mid == wire_mid) &&
204 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
205 (mid->command == shdr->Command)) {
206 spin_unlock(&GlobalMid_Lock);
207 return mid;
208 }
209 }
210 spin_unlock(&GlobalMid_Lock);
211 return NULL;
212 }
213
214 static void
215 smb2_dump_detail(void *buf)
216 {
217 #ifdef CONFIG_CIFS_DEBUG2
218 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
219
220 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
221 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
222 shdr->ProcessId);
223 cifs_dbg(VFS, "smb buf %p len %u\n", buf, smb2_calc_size(buf));
224 #endif
225 }
226
227 static bool
228 smb2_need_neg(struct TCP_Server_Info *server)
229 {
230 return server->max_read == 0;
231 }
232
233 static int
234 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
235 {
236 int rc;
237 ses->server->CurrentMid = 0;
238 rc = SMB2_negotiate(xid, ses);
239 /* BB we probably don't need to retry with modern servers */
240 if (rc == -EAGAIN)
241 rc = -EHOSTDOWN;
242 return rc;
243 }
244
245 static unsigned int
246 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
247 {
248 struct TCP_Server_Info *server = tcon->ses->server;
249 unsigned int wsize;
250
251 /* start with specified wsize, or default */
252 wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
253 wsize = min_t(unsigned int, wsize, server->max_write);
254 #ifdef CONFIG_CIFS_SMB_DIRECT
255 if (server->rdma)
256 wsize = min_t(unsigned int,
257 wsize, server->smbd_conn->max_readwrite_size);
258 #endif
259 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
260 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
261
262 return wsize;
263 }
264
265 static unsigned int
266 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
267 {
268 struct TCP_Server_Info *server = tcon->ses->server;
269 unsigned int rsize;
270
271 /* start with specified rsize, or default */
272 rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
273 rsize = min_t(unsigned int, rsize, server->max_read);
274 #ifdef CONFIG_CIFS_SMB_DIRECT
275 if (server->rdma)
276 rsize = min_t(unsigned int,
277 rsize, server->smbd_conn->max_readwrite_size);
278 #endif
279
280 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
281 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
282
283 return rsize;
284 }
285
286 #ifdef CONFIG_CIFS_STATS2
287 static int
288 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
289 {
290 int rc;
291 unsigned int ret_data_len = 0;
292 struct network_interface_info_ioctl_rsp *out_buf;
293
294 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
295 FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
296 NULL /* no data input */, 0 /* no data input */,
297 (char **)&out_buf, &ret_data_len);
298 if (rc != 0)
299 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
300 else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
301 cifs_dbg(VFS, "server returned bad net interface info buf\n");
302 rc = -EINVAL;
303 } else {
304 /* Dump info on first interface */
305 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
306 le32_to_cpu(out_buf->Capability));
307 cifs_dbg(FYI, "Link Speed %lld\n",
308 le64_to_cpu(out_buf->LinkSpeed));
309 }
310 kfree(out_buf);
311 return rc;
312 }
313 #endif /* STATS2 */
314
315 static void
316 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
317 {
318 int rc;
319 __le16 srch_path = 0; /* Null - open root of share */
320 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
321 struct cifs_open_parms oparms;
322 struct cifs_fid fid;
323
324 oparms.tcon = tcon;
325 oparms.desired_access = FILE_READ_ATTRIBUTES;
326 oparms.disposition = FILE_OPEN;
327 oparms.create_options = 0;
328 oparms.fid = &fid;
329 oparms.reconnect = false;
330
331 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
332 if (rc)
333 return;
334
335 #ifdef CONFIG_CIFS_STATS2
336 SMB3_request_interfaces(xid, tcon);
337 #endif /* STATS2 */
338
339 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
340 FS_ATTRIBUTE_INFORMATION);
341 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
342 FS_DEVICE_INFORMATION);
343 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
344 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
345 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
346 return;
347 }
348
349 static void
350 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
351 {
352 int rc;
353 __le16 srch_path = 0; /* Null - open root of share */
354 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
355 struct cifs_open_parms oparms;
356 struct cifs_fid fid;
357
358 oparms.tcon = tcon;
359 oparms.desired_access = FILE_READ_ATTRIBUTES;
360 oparms.disposition = FILE_OPEN;
361 oparms.create_options = 0;
362 oparms.fid = &fid;
363 oparms.reconnect = false;
364
365 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
366 if (rc)
367 return;
368
369 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
370 FS_ATTRIBUTE_INFORMATION);
371 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
372 FS_DEVICE_INFORMATION);
373 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
374 return;
375 }
376
377 static int
378 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
379 struct cifs_sb_info *cifs_sb, const char *full_path)
380 {
381 int rc;
382 __le16 *utf16_path;
383 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
384 struct cifs_open_parms oparms;
385 struct cifs_fid fid;
386
387 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
388 if (!utf16_path)
389 return -ENOMEM;
390
391 oparms.tcon = tcon;
392 oparms.desired_access = FILE_READ_ATTRIBUTES;
393 oparms.disposition = FILE_OPEN;
394 oparms.create_options = 0;
395 oparms.fid = &fid;
396 oparms.reconnect = false;
397
398 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
399 if (rc) {
400 kfree(utf16_path);
401 return rc;
402 }
403
404 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
405 kfree(utf16_path);
406 return rc;
407 }
408
409 static int
410 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
411 struct cifs_sb_info *cifs_sb, const char *full_path,
412 u64 *uniqueid, FILE_ALL_INFO *data)
413 {
414 *uniqueid = le64_to_cpu(data->IndexNumber);
415 return 0;
416 }
417
418 static int
419 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
420 struct cifs_fid *fid, FILE_ALL_INFO *data)
421 {
422 int rc;
423 struct smb2_file_all_info *smb2_data;
424
425 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
426 GFP_KERNEL);
427 if (smb2_data == NULL)
428 return -ENOMEM;
429
430 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
431 smb2_data);
432 if (!rc)
433 move_smb2_info_to_cifs(data, smb2_data);
434 kfree(smb2_data);
435 return rc;
436 }
437
438 #ifdef CONFIG_CIFS_XATTR
439 static ssize_t
440 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
441 struct smb2_file_full_ea_info *src, size_t src_size,
442 const unsigned char *ea_name)
443 {
444 int rc = 0;
445 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
446 char *name, *value;
447 size_t name_len, value_len, user_name_len;
448
449 while (src_size > 0) {
450 name = &src->ea_data[0];
451 name_len = (size_t)src->ea_name_length;
452 value = &src->ea_data[src->ea_name_length + 1];
453 value_len = (size_t)le16_to_cpu(src->ea_value_length);
454
455 if (name_len == 0) {
456 break;
457 }
458
459 if (src_size < 8 + name_len + 1 + value_len) {
460 cifs_dbg(FYI, "EA entry goes beyond length of list\n");
461 rc = -EIO;
462 goto out;
463 }
464
465 if (ea_name) {
466 if (ea_name_len == name_len &&
467 memcmp(ea_name, name, name_len) == 0) {
468 rc = value_len;
469 if (dst_size == 0)
470 goto out;
471 if (dst_size < value_len) {
472 rc = -ERANGE;
473 goto out;
474 }
475 memcpy(dst, value, value_len);
476 goto out;
477 }
478 } else {
479 /* 'user.' plus a terminating null */
480 user_name_len = 5 + 1 + name_len;
481
482 rc += user_name_len;
483
484 if (dst_size >= user_name_len) {
485 dst_size -= user_name_len;
486 memcpy(dst, "user.", 5);
487 dst += 5;
488 memcpy(dst, src->ea_data, name_len);
489 dst += name_len;
490 *dst = 0;
491 ++dst;
492 } else if (dst_size == 0) {
493 /* skip copy - calc size only */
494 } else {
495 /* stop before overrun buffer */
496 rc = -ERANGE;
497 break;
498 }
499 }
500
501 if (!src->next_entry_offset)
502 break;
503
504 if (src_size < le32_to_cpu(src->next_entry_offset)) {
505 /* stop before overrun buffer */
506 rc = -ERANGE;
507 break;
508 }
509 src_size -= le32_to_cpu(src->next_entry_offset);
510 src = (void *)((char *)src +
511 le32_to_cpu(src->next_entry_offset));
512 }
513
514 /* didn't find the named attribute */
515 if (ea_name)
516 rc = -ENODATA;
517
518 out:
519 return (ssize_t)rc;
520 }
521
522 static ssize_t
523 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
524 const unsigned char *path, const unsigned char *ea_name,
525 char *ea_data, size_t buf_size,
526 struct cifs_sb_info *cifs_sb)
527 {
528 int rc;
529 __le16 *utf16_path;
530 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
531 struct cifs_open_parms oparms;
532 struct cifs_fid fid;
533 struct smb2_file_full_ea_info *smb2_data;
534 int ea_buf_size = SMB2_MIN_EA_BUF;
535
536 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
537 if (!utf16_path)
538 return -ENOMEM;
539
540 oparms.tcon = tcon;
541 oparms.desired_access = FILE_READ_EA;
542 oparms.disposition = FILE_OPEN;
543 oparms.create_options = 0;
544 oparms.fid = &fid;
545 oparms.reconnect = false;
546
547 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
548 kfree(utf16_path);
549 if (rc) {
550 cifs_dbg(FYI, "open failed rc=%d\n", rc);
551 return rc;
552 }
553
554 while (1) {
555 smb2_data = kzalloc(ea_buf_size, GFP_KERNEL);
556 if (smb2_data == NULL) {
557 SMB2_close(xid, tcon, fid.persistent_fid,
558 fid.volatile_fid);
559 return -ENOMEM;
560 }
561
562 rc = SMB2_query_eas(xid, tcon, fid.persistent_fid,
563 fid.volatile_fid,
564 ea_buf_size, smb2_data);
565
566 if (rc != -E2BIG)
567 break;
568
569 kfree(smb2_data);
570 ea_buf_size <<= 1;
571
572 if (ea_buf_size > SMB2_MAX_EA_BUF) {
573 cifs_dbg(VFS, "EA size is too large\n");
574 SMB2_close(xid, tcon, fid.persistent_fid,
575 fid.volatile_fid);
576 return -ENOMEM;
577 }
578 }
579
580 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
581
582 if (!rc)
583 rc = move_smb2_ea_to_cifs(ea_data, buf_size, smb2_data,
584 SMB2_MAX_EA_BUF, ea_name);
585
586 kfree(smb2_data);
587 return rc;
588 }
589
590
591 static int
592 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
593 const char *path, const char *ea_name, const void *ea_value,
594 const __u16 ea_value_len, const struct nls_table *nls_codepage,
595 struct cifs_sb_info *cifs_sb)
596 {
597 int rc;
598 __le16 *utf16_path;
599 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
600 struct cifs_open_parms oparms;
601 struct cifs_fid fid;
602 struct smb2_file_full_ea_info *ea;
603 int ea_name_len = strlen(ea_name);
604 int len;
605
606 if (ea_name_len > 255)
607 return -EINVAL;
608
609 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
610 if (!utf16_path)
611 return -ENOMEM;
612
613 oparms.tcon = tcon;
614 oparms.desired_access = FILE_WRITE_EA;
615 oparms.disposition = FILE_OPEN;
616 oparms.create_options = 0;
617 oparms.fid = &fid;
618 oparms.reconnect = false;
619
620 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
621 kfree(utf16_path);
622 if (rc) {
623 cifs_dbg(FYI, "open failed rc=%d\n", rc);
624 return rc;
625 }
626
627 len = sizeof(ea) + ea_name_len + ea_value_len + 1;
628 ea = kzalloc(len, GFP_KERNEL);
629 if (ea == NULL) {
630 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
631 return -ENOMEM;
632 }
633
634 ea->ea_name_length = ea_name_len;
635 ea->ea_value_length = cpu_to_le16(ea_value_len);
636 memcpy(ea->ea_data, ea_name, ea_name_len + 1);
637 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
638
639 rc = SMB2_set_ea(xid, tcon, fid.persistent_fid, fid.volatile_fid, ea,
640 len);
641 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
642
643 return rc;
644 }
645 #endif
646
647 static bool
648 smb2_can_echo(struct TCP_Server_Info *server)
649 {
650 return server->echoes;
651 }
652
653 static void
654 smb2_clear_stats(struct cifs_tcon *tcon)
655 {
656 #ifdef CONFIG_CIFS_STATS
657 int i;
658 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
659 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
660 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
661 }
662 #endif
663 }
664
665 static void
666 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
667 {
668 seq_puts(m, "\n\tShare Capabilities:");
669 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
670 seq_puts(m, " DFS,");
671 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
672 seq_puts(m, " CONTINUOUS AVAILABILITY,");
673 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
674 seq_puts(m, " SCALEOUT,");
675 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
676 seq_puts(m, " CLUSTER,");
677 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
678 seq_puts(m, " ASYMMETRIC,");
679 if (tcon->capabilities == 0)
680 seq_puts(m, " None");
681 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
682 seq_puts(m, " Aligned,");
683 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
684 seq_puts(m, " Partition Aligned,");
685 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
686 seq_puts(m, " SSD,");
687 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
688 seq_puts(m, " TRIM-support,");
689
690 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
691 if (tcon->perf_sector_size)
692 seq_printf(m, "\tOptimal sector size: 0x%x",
693 tcon->perf_sector_size);
694 }
695
696 static void
697 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
698 {
699 #ifdef CONFIG_CIFS_STATS
700 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
701 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
702 seq_printf(m, "\nNegotiates: %d sent %d failed",
703 atomic_read(&sent[SMB2_NEGOTIATE_HE]),
704 atomic_read(&failed[SMB2_NEGOTIATE_HE]));
705 seq_printf(m, "\nSessionSetups: %d sent %d failed",
706 atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
707 atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
708 seq_printf(m, "\nLogoffs: %d sent %d failed",
709 atomic_read(&sent[SMB2_LOGOFF_HE]),
710 atomic_read(&failed[SMB2_LOGOFF_HE]));
711 seq_printf(m, "\nTreeConnects: %d sent %d failed",
712 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
713 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
714 seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
715 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
716 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
717 seq_printf(m, "\nCreates: %d sent %d failed",
718 atomic_read(&sent[SMB2_CREATE_HE]),
719 atomic_read(&failed[SMB2_CREATE_HE]));
720 seq_printf(m, "\nCloses: %d sent %d failed",
721 atomic_read(&sent[SMB2_CLOSE_HE]),
722 atomic_read(&failed[SMB2_CLOSE_HE]));
723 seq_printf(m, "\nFlushes: %d sent %d failed",
724 atomic_read(&sent[SMB2_FLUSH_HE]),
725 atomic_read(&failed[SMB2_FLUSH_HE]));
726 seq_printf(m, "\nReads: %d sent %d failed",
727 atomic_read(&sent[SMB2_READ_HE]),
728 atomic_read(&failed[SMB2_READ_HE]));
729 seq_printf(m, "\nWrites: %d sent %d failed",
730 atomic_read(&sent[SMB2_WRITE_HE]),
731 atomic_read(&failed[SMB2_WRITE_HE]));
732 seq_printf(m, "\nLocks: %d sent %d failed",
733 atomic_read(&sent[SMB2_LOCK_HE]),
734 atomic_read(&failed[SMB2_LOCK_HE]));
735 seq_printf(m, "\nIOCTLs: %d sent %d failed",
736 atomic_read(&sent[SMB2_IOCTL_HE]),
737 atomic_read(&failed[SMB2_IOCTL_HE]));
738 seq_printf(m, "\nCancels: %d sent %d failed",
739 atomic_read(&sent[SMB2_CANCEL_HE]),
740 atomic_read(&failed[SMB2_CANCEL_HE]));
741 seq_printf(m, "\nEchos: %d sent %d failed",
742 atomic_read(&sent[SMB2_ECHO_HE]),
743 atomic_read(&failed[SMB2_ECHO_HE]));
744 seq_printf(m, "\nQueryDirectories: %d sent %d failed",
745 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
746 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
747 seq_printf(m, "\nChangeNotifies: %d sent %d failed",
748 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
749 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
750 seq_printf(m, "\nQueryInfos: %d sent %d failed",
751 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
752 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
753 seq_printf(m, "\nSetInfos: %d sent %d failed",
754 atomic_read(&sent[SMB2_SET_INFO_HE]),
755 atomic_read(&failed[SMB2_SET_INFO_HE]));
756 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
757 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
758 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
759 #endif
760 }
761
762 static void
763 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
764 {
765 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
766 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
767
768 cfile->fid.persistent_fid = fid->persistent_fid;
769 cfile->fid.volatile_fid = fid->volatile_fid;
770 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
771 &fid->purge_cache);
772 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
773 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
774 }
775
776 static void
777 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
778 struct cifs_fid *fid)
779 {
780 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
781 }
782
783 static int
784 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
785 u64 persistent_fid, u64 volatile_fid,
786 struct copychunk_ioctl *pcchunk)
787 {
788 int rc;
789 unsigned int ret_data_len;
790 struct resume_key_req *res_key;
791
792 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
793 FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
794 NULL, 0 /* no input */,
795 (char **)&res_key, &ret_data_len);
796
797 if (rc) {
798 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
799 goto req_res_key_exit;
800 }
801 if (ret_data_len < sizeof(struct resume_key_req)) {
802 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
803 rc = -EINVAL;
804 goto req_res_key_exit;
805 }
806 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
807
808 req_res_key_exit:
809 kfree(res_key);
810 return rc;
811 }
812
813 static ssize_t
814 smb2_copychunk_range(const unsigned int xid,
815 struct cifsFileInfo *srcfile,
816 struct cifsFileInfo *trgtfile, u64 src_off,
817 u64 len, u64 dest_off)
818 {
819 int rc;
820 unsigned int ret_data_len;
821 struct copychunk_ioctl *pcchunk;
822 struct copychunk_ioctl_rsp *retbuf = NULL;
823 struct cifs_tcon *tcon;
824 int chunks_copied = 0;
825 bool chunk_sizes_updated = false;
826 ssize_t bytes_written, total_bytes_written = 0;
827
828 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
829
830 if (pcchunk == NULL)
831 return -ENOMEM;
832
833 cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
834 /* Request a key from the server to identify the source of the copy */
835 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
836 srcfile->fid.persistent_fid,
837 srcfile->fid.volatile_fid, pcchunk);
838
839 /* Note: request_res_key sets res_key null only if rc !=0 */
840 if (rc)
841 goto cchunk_out;
842
843 /* For now array only one chunk long, will make more flexible later */
844 pcchunk->ChunkCount = cpu_to_le32(1);
845 pcchunk->Reserved = 0;
846 pcchunk->Reserved2 = 0;
847
848 tcon = tlink_tcon(trgtfile->tlink);
849
850 while (len > 0) {
851 pcchunk->SourceOffset = cpu_to_le64(src_off);
852 pcchunk->TargetOffset = cpu_to_le64(dest_off);
853 pcchunk->Length =
854 cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
855
856 /* Request server copy to target from src identified by key */
857 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
858 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
859 true /* is_fsctl */, (char *)pcchunk,
860 sizeof(struct copychunk_ioctl), (char **)&retbuf,
861 &ret_data_len);
862 if (rc == 0) {
863 if (ret_data_len !=
864 sizeof(struct copychunk_ioctl_rsp)) {
865 cifs_dbg(VFS, "invalid cchunk response size\n");
866 rc = -EIO;
867 goto cchunk_out;
868 }
869 if (retbuf->TotalBytesWritten == 0) {
870 cifs_dbg(FYI, "no bytes copied\n");
871 rc = -EIO;
872 goto cchunk_out;
873 }
874 /*
875 * Check if server claimed to write more than we asked
876 */
877 if (le32_to_cpu(retbuf->TotalBytesWritten) >
878 le32_to_cpu(pcchunk->Length)) {
879 cifs_dbg(VFS, "invalid copy chunk response\n");
880 rc = -EIO;
881 goto cchunk_out;
882 }
883 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
884 cifs_dbg(VFS, "invalid num chunks written\n");
885 rc = -EIO;
886 goto cchunk_out;
887 }
888 chunks_copied++;
889
890 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
891 src_off += bytes_written;
892 dest_off += bytes_written;
893 len -= bytes_written;
894 total_bytes_written += bytes_written;
895
896 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
897 le32_to_cpu(retbuf->ChunksWritten),
898 le32_to_cpu(retbuf->ChunkBytesWritten),
899 bytes_written);
900 } else if (rc == -EINVAL) {
901 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
902 goto cchunk_out;
903
904 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
905 le32_to_cpu(retbuf->ChunksWritten),
906 le32_to_cpu(retbuf->ChunkBytesWritten),
907 le32_to_cpu(retbuf->TotalBytesWritten));
908
909 /*
910 * Check if this is the first request using these sizes,
911 * (ie check if copy succeed once with original sizes
912 * and check if the server gave us different sizes after
913 * we already updated max sizes on previous request).
914 * if not then why is the server returning an error now
915 */
916 if ((chunks_copied != 0) || chunk_sizes_updated)
917 goto cchunk_out;
918
919 /* Check that server is not asking us to grow size */
920 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
921 tcon->max_bytes_chunk)
922 tcon->max_bytes_chunk =
923 le32_to_cpu(retbuf->ChunkBytesWritten);
924 else
925 goto cchunk_out; /* server gave us bogus size */
926
927 /* No need to change MaxChunks since already set to 1 */
928 chunk_sizes_updated = true;
929 } else
930 goto cchunk_out;
931 }
932
933 cchunk_out:
934 kfree(pcchunk);
935 kfree(retbuf);
936 if (rc)
937 return rc;
938 else
939 return total_bytes_written;
940 }
941
942 static int
943 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
944 struct cifs_fid *fid)
945 {
946 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
947 }
948
949 static unsigned int
950 smb2_read_data_offset(char *buf)
951 {
952 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
953 return rsp->DataOffset;
954 }
955
956 static unsigned int
957 smb2_read_data_length(char *buf, bool in_remaining)
958 {
959 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
960
961 if (in_remaining)
962 return le32_to_cpu(rsp->DataRemaining);
963
964 return le32_to_cpu(rsp->DataLength);
965 }
966
967
968 static int
969 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
970 struct cifs_io_parms *parms, unsigned int *bytes_read,
971 char **buf, int *buf_type)
972 {
973 parms->persistent_fid = pfid->persistent_fid;
974 parms->volatile_fid = pfid->volatile_fid;
975 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
976 }
977
978 static int
979 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
980 struct cifs_io_parms *parms, unsigned int *written,
981 struct kvec *iov, unsigned long nr_segs)
982 {
983
984 parms->persistent_fid = pfid->persistent_fid;
985 parms->volatile_fid = pfid->volatile_fid;
986 return SMB2_write(xid, parms, written, iov, nr_segs);
987 }
988
989 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
990 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
991 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
992 {
993 struct cifsInodeInfo *cifsi;
994 int rc;
995
996 cifsi = CIFS_I(inode);
997
998 /* if file already sparse don't bother setting sparse again */
999 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1000 return true; /* already sparse */
1001
1002 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1003 return true; /* already not sparse */
1004
1005 /*
1006 * Can't check for sparse support on share the usual way via the
1007 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1008 * since Samba server doesn't set the flag on the share, yet
1009 * supports the set sparse FSCTL and returns sparse correctly
1010 * in the file attributes. If we fail setting sparse though we
1011 * mark that server does not support sparse files for this share
1012 * to avoid repeatedly sending the unsupported fsctl to server
1013 * if the file is repeatedly extended.
1014 */
1015 if (tcon->broken_sparse_sup)
1016 return false;
1017
1018 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1019 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1020 true /* is_fctl */,
1021 &setsparse, 1, NULL, NULL);
1022 if (rc) {
1023 tcon->broken_sparse_sup = true;
1024 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1025 return false;
1026 }
1027
1028 if (setsparse)
1029 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1030 else
1031 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1032
1033 return true;
1034 }
1035
1036 static int
1037 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1038 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1039 {
1040 __le64 eof = cpu_to_le64(size);
1041 struct inode *inode;
1042
1043 /*
1044 * If extending file more than one page make sparse. Many Linux fs
1045 * make files sparse by default when extending via ftruncate
1046 */
1047 inode = d_inode(cfile->dentry);
1048
1049 if (!set_alloc && (size > inode->i_size + 8192)) {
1050 __u8 set_sparse = 1;
1051
1052 /* whether set sparse succeeds or not, extend the file */
1053 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1054 }
1055
1056 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1057 cfile->fid.volatile_fid, cfile->pid, &eof, false);
1058 }
1059
1060 static int
1061 smb2_duplicate_extents(const unsigned int xid,
1062 struct cifsFileInfo *srcfile,
1063 struct cifsFileInfo *trgtfile, u64 src_off,
1064 u64 len, u64 dest_off)
1065 {
1066 int rc;
1067 unsigned int ret_data_len;
1068 struct duplicate_extents_to_file dup_ext_buf;
1069 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1070
1071 /* server fileays advertise duplicate extent support with this flag */
1072 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1073 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1074 return -EOPNOTSUPP;
1075
1076 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1077 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1078 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1079 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1080 dup_ext_buf.ByteCount = cpu_to_le64(len);
1081 cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
1082 src_off, dest_off, len);
1083
1084 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1085 if (rc)
1086 goto duplicate_extents_out;
1087
1088 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1089 trgtfile->fid.volatile_fid,
1090 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1091 true /* is_fsctl */,
1092 (char *)&dup_ext_buf,
1093 sizeof(struct duplicate_extents_to_file),
1094 NULL,
1095 &ret_data_len);
1096
1097 if (ret_data_len > 0)
1098 cifs_dbg(FYI, "non-zero response length in duplicate extents");
1099
1100 duplicate_extents_out:
1101 return rc;
1102 }
1103
1104 static int
1105 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1106 struct cifsFileInfo *cfile)
1107 {
1108 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1109 cfile->fid.volatile_fid);
1110 }
1111
1112 static int
1113 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1114 struct cifsFileInfo *cfile)
1115 {
1116 struct fsctl_set_integrity_information_req integr_info;
1117 unsigned int ret_data_len;
1118
1119 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1120 integr_info.Flags = 0;
1121 integr_info.Reserved = 0;
1122
1123 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1124 cfile->fid.volatile_fid,
1125 FSCTL_SET_INTEGRITY_INFORMATION,
1126 true /* is_fsctl */,
1127 (char *)&integr_info,
1128 sizeof(struct fsctl_set_integrity_information_req),
1129 NULL,
1130 &ret_data_len);
1131
1132 }
1133
1134 static int
1135 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1136 struct cifsFileInfo *cfile, void __user *ioc_buf)
1137 {
1138 char *retbuf = NULL;
1139 unsigned int ret_data_len = 0;
1140 int rc;
1141 struct smb_snapshot_array snapshot_in;
1142
1143 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1144 cfile->fid.volatile_fid,
1145 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
1146 true /* is_fsctl */,
1147 NULL, 0 /* no input data */,
1148 (char **)&retbuf,
1149 &ret_data_len);
1150 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1151 rc, ret_data_len);
1152 if (rc)
1153 return rc;
1154
1155 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
1156 /* Fixup buffer */
1157 if (copy_from_user(&snapshot_in, ioc_buf,
1158 sizeof(struct smb_snapshot_array))) {
1159 rc = -EFAULT;
1160 kfree(retbuf);
1161 return rc;
1162 }
1163 if (snapshot_in.snapshot_array_size < sizeof(struct smb_snapshot_array)) {
1164 rc = -ERANGE;
1165 kfree(retbuf);
1166 return rc;
1167 }
1168
1169 if (ret_data_len > snapshot_in.snapshot_array_size)
1170 ret_data_len = snapshot_in.snapshot_array_size;
1171
1172 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
1173 rc = -EFAULT;
1174 }
1175
1176 kfree(retbuf);
1177 return rc;
1178 }
1179
1180 static int
1181 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
1182 const char *path, struct cifs_sb_info *cifs_sb,
1183 struct cifs_fid *fid, __u16 search_flags,
1184 struct cifs_search_info *srch_inf)
1185 {
1186 __le16 *utf16_path;
1187 int rc;
1188 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1189 struct cifs_open_parms oparms;
1190
1191 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1192 if (!utf16_path)
1193 return -ENOMEM;
1194
1195 oparms.tcon = tcon;
1196 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
1197 oparms.disposition = FILE_OPEN;
1198 oparms.create_options = 0;
1199 oparms.fid = fid;
1200 oparms.reconnect = false;
1201
1202 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1203 kfree(utf16_path);
1204 if (rc) {
1205 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
1206 return rc;
1207 }
1208
1209 srch_inf->entries_in_buffer = 0;
1210 srch_inf->index_of_last_entry = 0;
1211
1212 rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
1213 fid->volatile_fid, 0, srch_inf);
1214 if (rc) {
1215 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
1216 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1217 }
1218 return rc;
1219 }
1220
1221 static int
1222 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1223 struct cifs_fid *fid, __u16 search_flags,
1224 struct cifs_search_info *srch_inf)
1225 {
1226 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1227 fid->volatile_fid, 0, srch_inf);
1228 }
1229
1230 static int
1231 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1232 struct cifs_fid *fid)
1233 {
1234 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1235 }
1236
1237 /*
1238 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
1239 * the number of credits and return true. Otherwise - return false.
1240 */
1241 static bool
1242 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1243 {
1244 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
1245
1246 if (shdr->Status != STATUS_PENDING)
1247 return false;
1248
1249 if (!length) {
1250 spin_lock(&server->req_lock);
1251 server->credits += le16_to_cpu(shdr->CreditRequest);
1252 spin_unlock(&server->req_lock);
1253 wake_up(&server->request_q);
1254 }
1255
1256 return true;
1257 }
1258
1259 static bool
1260 smb2_is_session_expired(char *buf)
1261 {
1262 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
1263
1264 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED)
1265 return false;
1266
1267 cifs_dbg(FYI, "Session expired\n");
1268 return true;
1269 }
1270
1271 static int
1272 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1273 struct cifsInodeInfo *cinode)
1274 {
1275 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1276 return SMB2_lease_break(0, tcon, cinode->lease_key,
1277 smb2_get_lease_state(cinode));
1278
1279 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1280 fid->volatile_fid,
1281 CIFS_CACHE_READ(cinode) ? 1 : 0);
1282 }
1283
1284 static int
1285 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1286 struct kstatfs *buf)
1287 {
1288 int rc;
1289 __le16 srch_path = 0; /* Null - open root of share */
1290 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1291 struct cifs_open_parms oparms;
1292 struct cifs_fid fid;
1293
1294 oparms.tcon = tcon;
1295 oparms.desired_access = FILE_READ_ATTRIBUTES;
1296 oparms.disposition = FILE_OPEN;
1297 oparms.create_options = 0;
1298 oparms.fid = &fid;
1299 oparms.reconnect = false;
1300
1301 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
1302 if (rc)
1303 return rc;
1304 buf->f_type = SMB2_MAGIC_NUMBER;
1305 rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1306 buf);
1307 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1308 return rc;
1309 }
1310
1311 static bool
1312 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1313 {
1314 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1315 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1316 }
1317
1318 static int
1319 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1320 __u64 length, __u32 type, int lock, int unlock, bool wait)
1321 {
1322 if (unlock && !lock)
1323 type = SMB2_LOCKFLAG_UNLOCK;
1324 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1325 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1326 current->tgid, length, offset, type, wait);
1327 }
1328
1329 static void
1330 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1331 {
1332 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1333 }
1334
1335 static void
1336 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1337 {
1338 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1339 }
1340
1341 static void
1342 smb2_new_lease_key(struct cifs_fid *fid)
1343 {
1344 generate_random_uuid(fid->lease_key);
1345 }
1346
1347 static int
1348 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
1349 const char *search_name,
1350 struct dfs_info3_param **target_nodes,
1351 unsigned int *num_of_nodes,
1352 const struct nls_table *nls_codepage, int remap)
1353 {
1354 int rc;
1355 __le16 *utf16_path = NULL;
1356 int utf16_path_len = 0;
1357 struct cifs_tcon *tcon;
1358 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
1359 struct get_dfs_referral_rsp *dfs_rsp = NULL;
1360 u32 dfs_req_size = 0, dfs_rsp_size = 0;
1361
1362 cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
1363
1364 /*
1365 * Try to use the IPC tcon, otherwise just use any
1366 */
1367 tcon = ses->tcon_ipc;
1368 if (tcon == NULL) {
1369 spin_lock(&cifs_tcp_ses_lock);
1370 tcon = list_first_entry_or_null(&ses->tcon_list,
1371 struct cifs_tcon,
1372 tcon_list);
1373 if (tcon)
1374 tcon->tc_count++;
1375 spin_unlock(&cifs_tcp_ses_lock);
1376 }
1377
1378 if (tcon == NULL) {
1379 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
1380 ses);
1381 rc = -ENOTCONN;
1382 goto out;
1383 }
1384
1385 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
1386 &utf16_path_len,
1387 nls_codepage, remap);
1388 if (!utf16_path) {
1389 rc = -ENOMEM;
1390 goto out;
1391 }
1392
1393 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
1394 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
1395 if (!dfs_req) {
1396 rc = -ENOMEM;
1397 goto out;
1398 }
1399
1400 /* Highest DFS referral version understood */
1401 dfs_req->MaxReferralLevel = DFS_VERSION;
1402
1403 /* Path to resolve in an UTF-16 null-terminated string */
1404 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
1405
1406 do {
1407 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1408 FSCTL_DFS_GET_REFERRALS,
1409 true /* is_fsctl */,
1410 (char *)dfs_req, dfs_req_size,
1411 (char **)&dfs_rsp, &dfs_rsp_size);
1412 } while (rc == -EAGAIN);
1413
1414 if (rc) {
1415 if (rc != -ENOENT)
1416 cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
1417 goto out;
1418 }
1419
1420 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
1421 num_of_nodes, target_nodes,
1422 nls_codepage, remap, search_name,
1423 true /* is_unicode */);
1424 if (rc) {
1425 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
1426 goto out;
1427 }
1428
1429 out:
1430 if (tcon && !tcon->ipc) {
1431 /* ipc tcons are not refcounted */
1432 spin_lock(&cifs_tcp_ses_lock);
1433 tcon->tc_count--;
1434 spin_unlock(&cifs_tcp_ses_lock);
1435 }
1436 kfree(utf16_path);
1437 kfree(dfs_req);
1438 kfree(dfs_rsp);
1439 return rc;
1440 }
1441 #define SMB2_SYMLINK_STRUCT_SIZE \
1442 (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1443
1444 static int
1445 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1446 const char *full_path, char **target_path,
1447 struct cifs_sb_info *cifs_sb)
1448 {
1449 int rc;
1450 __le16 *utf16_path;
1451 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1452 struct cifs_open_parms oparms;
1453 struct cifs_fid fid;
1454 struct smb2_err_rsp *err_buf = NULL;
1455 struct smb2_symlink_err_rsp *symlink;
1456 unsigned int sub_len;
1457 unsigned int sub_offset;
1458 unsigned int print_len;
1459 unsigned int print_offset;
1460
1461 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1462
1463 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1464 if (!utf16_path)
1465 return -ENOMEM;
1466
1467 oparms.tcon = tcon;
1468 oparms.desired_access = FILE_READ_ATTRIBUTES;
1469 oparms.disposition = FILE_OPEN;
1470 oparms.create_options = 0;
1471 oparms.fid = &fid;
1472 oparms.reconnect = false;
1473
1474 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1475
1476 if (!rc || !err_buf) {
1477 kfree(utf16_path);
1478 return -ENOENT;
1479 }
1480
1481 if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1482 get_rfc1002_length(err_buf) + 4 < SMB2_SYMLINK_STRUCT_SIZE) {
1483 kfree(utf16_path);
1484 return -ENOENT;
1485 }
1486
1487 /* open must fail on symlink - reset rc */
1488 rc = 0;
1489 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1490 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1491 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1492 print_len = le16_to_cpu(symlink->PrintNameLength);
1493 print_offset = le16_to_cpu(symlink->PrintNameOffset);
1494
1495 if (get_rfc1002_length(err_buf) + 4 <
1496 SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1497 kfree(utf16_path);
1498 return -ENOENT;
1499 }
1500
1501 if (get_rfc1002_length(err_buf) + 4 <
1502 SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1503 kfree(utf16_path);
1504 return -ENOENT;
1505 }
1506
1507 *target_path = cifs_strndup_from_utf16(
1508 (char *)symlink->PathBuffer + sub_offset,
1509 sub_len, true, cifs_sb->local_nls);
1510 if (!(*target_path)) {
1511 kfree(utf16_path);
1512 return -ENOMEM;
1513 }
1514 convert_delimiter(*target_path, '/');
1515 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1516 kfree(utf16_path);
1517 return rc;
1518 }
1519
1520 #ifdef CONFIG_CIFS_ACL
1521 static struct cifs_ntsd *
1522 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
1523 const struct cifs_fid *cifsfid, u32 *pacllen)
1524 {
1525 struct cifs_ntsd *pntsd = NULL;
1526 unsigned int xid;
1527 int rc = -EOPNOTSUPP;
1528 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1529
1530 if (IS_ERR(tlink))
1531 return ERR_CAST(tlink);
1532
1533 xid = get_xid();
1534 cifs_dbg(FYI, "trying to get acl\n");
1535
1536 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
1537 cifsfid->volatile_fid, (void **)&pntsd, pacllen);
1538 free_xid(xid);
1539
1540 cifs_put_tlink(tlink);
1541
1542 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1543 if (rc)
1544 return ERR_PTR(rc);
1545 return pntsd;
1546
1547 }
1548
1549 static struct cifs_ntsd *
1550 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
1551 const char *path, u32 *pacllen)
1552 {
1553 struct cifs_ntsd *pntsd = NULL;
1554 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1555 unsigned int xid;
1556 int rc;
1557 struct cifs_tcon *tcon;
1558 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1559 struct cifs_fid fid;
1560 struct cifs_open_parms oparms;
1561 __le16 *utf16_path;
1562
1563 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
1564 if (IS_ERR(tlink))
1565 return ERR_CAST(tlink);
1566
1567 tcon = tlink_tcon(tlink);
1568 xid = get_xid();
1569
1570 if (backup_cred(cifs_sb))
1571 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1572 else
1573 oparms.create_options = 0;
1574
1575 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1576 if (!utf16_path)
1577 return ERR_PTR(-ENOMEM);
1578
1579 oparms.tcon = tcon;
1580 oparms.desired_access = READ_CONTROL;
1581 oparms.disposition = FILE_OPEN;
1582 oparms.fid = &fid;
1583 oparms.reconnect = false;
1584
1585 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1586 kfree(utf16_path);
1587 if (!rc) {
1588 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1589 fid.volatile_fid, (void **)&pntsd, pacllen);
1590 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1591 }
1592
1593 cifs_put_tlink(tlink);
1594 free_xid(xid);
1595
1596 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1597 if (rc)
1598 return ERR_PTR(rc);
1599 return pntsd;
1600 }
1601
1602 #ifdef CONFIG_CIFS_ACL
1603 static int
1604 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
1605 struct inode *inode, const char *path, int aclflag)
1606 {
1607 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1608 unsigned int xid;
1609 int rc, access_flags = 0;
1610 struct cifs_tcon *tcon;
1611 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1612 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1613 struct cifs_fid fid;
1614 struct cifs_open_parms oparms;
1615 __le16 *utf16_path;
1616
1617 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
1618 if (IS_ERR(tlink))
1619 return PTR_ERR(tlink);
1620
1621 tcon = tlink_tcon(tlink);
1622 xid = get_xid();
1623
1624 if (backup_cred(cifs_sb))
1625 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1626 else
1627 oparms.create_options = 0;
1628
1629 if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
1630 access_flags = WRITE_OWNER;
1631 else
1632 access_flags = WRITE_DAC;
1633
1634 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1635 if (!utf16_path)
1636 return -ENOMEM;
1637
1638 oparms.tcon = tcon;
1639 oparms.desired_access = access_flags;
1640 oparms.disposition = FILE_OPEN;
1641 oparms.path = path;
1642 oparms.fid = &fid;
1643 oparms.reconnect = false;
1644
1645 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1646 kfree(utf16_path);
1647 if (!rc) {
1648 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1649 fid.volatile_fid, pnntsd, acllen, aclflag);
1650 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1651 }
1652
1653 cifs_put_tlink(tlink);
1654 free_xid(xid);
1655 return rc;
1656 }
1657 #endif /* CIFS_ACL */
1658
1659 /* Retrieve an ACL from the server */
1660 static struct cifs_ntsd *
1661 get_smb2_acl(struct cifs_sb_info *cifs_sb,
1662 struct inode *inode, const char *path,
1663 u32 *pacllen)
1664 {
1665 struct cifs_ntsd *pntsd = NULL;
1666 struct cifsFileInfo *open_file = NULL;
1667
1668 if (inode)
1669 open_file = find_readable_file(CIFS_I(inode), true);
1670 if (!open_file)
1671 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
1672
1673 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
1674 cifsFileInfo_put(open_file);
1675 return pntsd;
1676 }
1677 #endif
1678
1679 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1680 loff_t offset, loff_t len, bool keep_size)
1681 {
1682 struct inode *inode;
1683 struct cifsInodeInfo *cifsi;
1684 struct cifsFileInfo *cfile = file->private_data;
1685 struct file_zero_data_information fsctl_buf;
1686 long rc;
1687 unsigned int xid;
1688
1689 xid = get_xid();
1690
1691 inode = d_inode(cfile->dentry);
1692 cifsi = CIFS_I(inode);
1693
1694 /* if file not oplocked can't be sure whether asking to extend size */
1695 if (!CIFS_CACHE_READ(cifsi))
1696 if (keep_size == false)
1697 return -EOPNOTSUPP;
1698
1699 /*
1700 * Must check if file sparse since fallocate -z (zero range) assumes
1701 * non-sparse allocation
1702 */
1703 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1704 return -EOPNOTSUPP;
1705
1706 /*
1707 * need to make sure we are not asked to extend the file since the SMB3
1708 * fsctl does not change the file size. In the future we could change
1709 * this to zero the first part of the range then set the file size
1710 * which for a non sparse file would zero the newly extended range
1711 */
1712 if (keep_size == false)
1713 if (i_size_read(inode) < offset + len)
1714 return -EOPNOTSUPP;
1715
1716 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1717
1718 fsctl_buf.FileOffset = cpu_to_le64(offset);
1719 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1720
1721 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1722 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1723 true /* is_fctl */, (char *)&fsctl_buf,
1724 sizeof(struct file_zero_data_information), NULL, NULL);
1725 free_xid(xid);
1726 return rc;
1727 }
1728
1729 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1730 loff_t offset, loff_t len)
1731 {
1732 struct inode *inode;
1733 struct cifsInodeInfo *cifsi;
1734 struct cifsFileInfo *cfile = file->private_data;
1735 struct file_zero_data_information fsctl_buf;
1736 long rc;
1737 unsigned int xid;
1738 __u8 set_sparse = 1;
1739
1740 xid = get_xid();
1741
1742 inode = d_inode(cfile->dentry);
1743 cifsi = CIFS_I(inode);
1744
1745 /* Need to make file sparse, if not already, before freeing range. */
1746 /* Consider adding equivalent for compressed since it could also work */
1747 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1748 return -EOPNOTSUPP;
1749
1750 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1751
1752 fsctl_buf.FileOffset = cpu_to_le64(offset);
1753 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1754
1755 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1756 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1757 true /* is_fctl */, (char *)&fsctl_buf,
1758 sizeof(struct file_zero_data_information), NULL, NULL);
1759 free_xid(xid);
1760 return rc;
1761 }
1762
1763 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1764 loff_t off, loff_t len, bool keep_size)
1765 {
1766 struct inode *inode;
1767 struct cifsInodeInfo *cifsi;
1768 struct cifsFileInfo *cfile = file->private_data;
1769 long rc = -EOPNOTSUPP;
1770 unsigned int xid;
1771
1772 xid = get_xid();
1773
1774 inode = d_inode(cfile->dentry);
1775 cifsi = CIFS_I(inode);
1776
1777 /* if file not oplocked can't be sure whether asking to extend size */
1778 if (!CIFS_CACHE_READ(cifsi))
1779 if (keep_size == false)
1780 return -EOPNOTSUPP;
1781
1782 /*
1783 * Files are non-sparse by default so falloc may be a no-op
1784 * Must check if file sparse. If not sparse, and not extending
1785 * then no need to do anything since file already allocated
1786 */
1787 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1788 if (keep_size == true)
1789 return 0;
1790 /* check if extending file */
1791 else if (i_size_read(inode) >= off + len)
1792 /* not extending file and already not sparse */
1793 return 0;
1794 /* BB: in future add else clause to extend file */
1795 else
1796 return -EOPNOTSUPP;
1797 }
1798
1799 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1800 /*
1801 * Check if falloc starts within first few pages of file
1802 * and ends within a few pages of the end of file to
1803 * ensure that most of file is being forced to be
1804 * fallocated now. If so then setting whole file sparse
1805 * ie potentially making a few extra pages at the beginning
1806 * or end of the file non-sparse via set_sparse is harmless.
1807 */
1808 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1809 return -EOPNOTSUPP;
1810
1811 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1812 }
1813 /* BB: else ... in future add code to extend file and set sparse */
1814
1815
1816 free_xid(xid);
1817 return rc;
1818 }
1819
1820
1821 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1822 loff_t off, loff_t len)
1823 {
1824 /* KEEP_SIZE already checked for by do_fallocate */
1825 if (mode & FALLOC_FL_PUNCH_HOLE)
1826 return smb3_punch_hole(file, tcon, off, len);
1827 else if (mode & FALLOC_FL_ZERO_RANGE) {
1828 if (mode & FALLOC_FL_KEEP_SIZE)
1829 return smb3_zero_range(file, tcon, off, len, true);
1830 return smb3_zero_range(file, tcon, off, len, false);
1831 } else if (mode == FALLOC_FL_KEEP_SIZE)
1832 return smb3_simple_falloc(file, tcon, off, len, true);
1833 else if (mode == 0)
1834 return smb3_simple_falloc(file, tcon, off, len, false);
1835
1836 return -EOPNOTSUPP;
1837 }
1838
1839 static void
1840 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1841 struct cifsInodeInfo *cinode, bool set_level2)
1842 {
1843 if (set_level2)
1844 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1845 0, NULL);
1846 else
1847 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1848 }
1849
1850 static void
1851 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1852 unsigned int epoch, bool *purge_cache)
1853 {
1854 oplock &= 0xFF;
1855 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1856 return;
1857 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1858 cinode->oplock = CIFS_CACHE_RHW_FLG;
1859 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1860 &cinode->vfs_inode);
1861 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1862 cinode->oplock = CIFS_CACHE_RW_FLG;
1863 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1864 &cinode->vfs_inode);
1865 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1866 cinode->oplock = CIFS_CACHE_READ_FLG;
1867 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1868 &cinode->vfs_inode);
1869 } else
1870 cinode->oplock = 0;
1871 }
1872
1873 static void
1874 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1875 unsigned int epoch, bool *purge_cache)
1876 {
1877 char message[5] = {0};
1878
1879 oplock &= 0xFF;
1880 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1881 return;
1882
1883 cinode->oplock = 0;
1884 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1885 cinode->oplock |= CIFS_CACHE_READ_FLG;
1886 strcat(message, "R");
1887 }
1888 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1889 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1890 strcat(message, "H");
1891 }
1892 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1893 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1894 strcat(message, "W");
1895 }
1896 if (!cinode->oplock)
1897 strcat(message, "None");
1898 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1899 &cinode->vfs_inode);
1900 }
1901
1902 static void
1903 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1904 unsigned int epoch, bool *purge_cache)
1905 {
1906 unsigned int old_oplock = cinode->oplock;
1907
1908 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1909
1910 if (purge_cache) {
1911 *purge_cache = false;
1912 if (old_oplock == CIFS_CACHE_READ_FLG) {
1913 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1914 (epoch - cinode->epoch > 0))
1915 *purge_cache = true;
1916 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1917 (epoch - cinode->epoch > 1))
1918 *purge_cache = true;
1919 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1920 (epoch - cinode->epoch > 1))
1921 *purge_cache = true;
1922 else if (cinode->oplock == 0 &&
1923 (epoch - cinode->epoch > 0))
1924 *purge_cache = true;
1925 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1926 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1927 (epoch - cinode->epoch > 0))
1928 *purge_cache = true;
1929 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1930 (epoch - cinode->epoch > 1))
1931 *purge_cache = true;
1932 }
1933 cinode->epoch = epoch;
1934 }
1935 }
1936
1937 static bool
1938 smb2_is_read_op(__u32 oplock)
1939 {
1940 return oplock == SMB2_OPLOCK_LEVEL_II;
1941 }
1942
1943 static bool
1944 smb21_is_read_op(__u32 oplock)
1945 {
1946 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1947 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1948 }
1949
1950 static __le32
1951 map_oplock_to_lease(u8 oplock)
1952 {
1953 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1954 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1955 else if (oplock == SMB2_OPLOCK_LEVEL_II)
1956 return SMB2_LEASE_READ_CACHING;
1957 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1958 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1959 SMB2_LEASE_WRITE_CACHING;
1960 return 0;
1961 }
1962
1963 static char *
1964 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1965 {
1966 struct create_lease *buf;
1967
1968 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1969 if (!buf)
1970 return NULL;
1971
1972 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1973 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1974 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1975
1976 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1977 (struct create_lease, lcontext));
1978 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1979 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1980 (struct create_lease, Name));
1981 buf->ccontext.NameLength = cpu_to_le16(4);
1982 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1983 buf->Name[0] = 'R';
1984 buf->Name[1] = 'q';
1985 buf->Name[2] = 'L';
1986 buf->Name[3] = 's';
1987 return (char *)buf;
1988 }
1989
1990 static char *
1991 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1992 {
1993 struct create_lease_v2 *buf;
1994
1995 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1996 if (!buf)
1997 return NULL;
1998
1999 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
2000 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
2001 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2002
2003 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2004 (struct create_lease_v2, lcontext));
2005 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
2006 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2007 (struct create_lease_v2, Name));
2008 buf->ccontext.NameLength = cpu_to_le16(4);
2009 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2010 buf->Name[0] = 'R';
2011 buf->Name[1] = 'q';
2012 buf->Name[2] = 'L';
2013 buf->Name[3] = 's';
2014 return (char *)buf;
2015 }
2016
2017 static __u8
2018 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
2019 {
2020 struct create_lease *lc = (struct create_lease *)buf;
2021
2022 *epoch = 0; /* not used */
2023 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2024 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2025 return le32_to_cpu(lc->lcontext.LeaseState);
2026 }
2027
2028 static __u8
2029 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
2030 {
2031 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
2032
2033 *epoch = le16_to_cpu(lc->lcontext.Epoch);
2034 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2035 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2036 return le32_to_cpu(lc->lcontext.LeaseState);
2037 }
2038
2039 static unsigned int
2040 smb2_wp_retry_size(struct inode *inode)
2041 {
2042 return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
2043 SMB2_MAX_BUFFER_SIZE);
2044 }
2045
2046 static bool
2047 smb2_dir_needs_close(struct cifsFileInfo *cfile)
2048 {
2049 return !cfile->invalidHandle;
2050 }
2051
2052 static void
2053 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, struct smb_rqst *old_rq)
2054 {
2055 struct smb2_sync_hdr *shdr =
2056 (struct smb2_sync_hdr *)old_rq->rq_iov[1].iov_base;
2057 unsigned int orig_len = get_rfc1002_length(old_rq->rq_iov[0].iov_base);
2058
2059 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
2060 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
2061 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
2062 tr_hdr->Flags = cpu_to_le16(0x01);
2063 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2064 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
2065 inc_rfc1001_len(tr_hdr, sizeof(struct smb2_transform_hdr) - 4);
2066 inc_rfc1001_len(tr_hdr, orig_len);
2067 }
2068
2069 static struct scatterlist *
2070 init_sg(struct smb_rqst *rqst, u8 *sign)
2071 {
2072 unsigned int sg_len = rqst->rq_nvec + rqst->rq_npages + 1;
2073 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 24;
2074 struct scatterlist *sg;
2075 unsigned int i;
2076 unsigned int j;
2077
2078 sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
2079 if (!sg)
2080 return NULL;
2081
2082 sg_init_table(sg, sg_len);
2083 sg_set_buf(&sg[0], rqst->rq_iov[0].iov_base + 24, assoc_data_len);
2084 for (i = 1; i < rqst->rq_nvec; i++)
2085 sg_set_buf(&sg[i], rqst->rq_iov[i].iov_base,
2086 rqst->rq_iov[i].iov_len);
2087 for (j = 0; i < sg_len - 1; i++, j++) {
2088 unsigned int len = (j < rqst->rq_npages - 1) ? rqst->rq_pagesz
2089 : rqst->rq_tailsz;
2090 sg_set_page(&sg[i], rqst->rq_pages[j], len, 0);
2091 }
2092 sg_set_buf(&sg[sg_len - 1], sign, SMB2_SIGNATURE_SIZE);
2093 return sg;
2094 }
2095
2096 static int
2097 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
2098 {
2099 struct cifs_ses *ses;
2100 u8 *ses_enc_key;
2101
2102 spin_lock(&cifs_tcp_ses_lock);
2103 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2104 if (ses->Suid != ses_id)
2105 continue;
2106 ses_enc_key = enc ? ses->smb3encryptionkey :
2107 ses->smb3decryptionkey;
2108 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
2109 spin_unlock(&cifs_tcp_ses_lock);
2110 return 0;
2111 }
2112 spin_unlock(&cifs_tcp_ses_lock);
2113
2114 return 1;
2115 }
2116 /*
2117 * Encrypt or decrypt @rqst message. @rqst has the following format:
2118 * iov[0] - transform header (associate data),
2119 * iov[1-N] and pages - data to encrypt.
2120 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
2121 * untouched.
2122 */
2123 static int
2124 crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
2125 {
2126 struct smb2_transform_hdr *tr_hdr =
2127 (struct smb2_transform_hdr *)rqst->rq_iov[0].iov_base;
2128 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 24;
2129 int rc = 0;
2130 struct scatterlist *sg;
2131 u8 sign[SMB2_SIGNATURE_SIZE] = {};
2132 u8 key[SMB3_SIGN_KEY_SIZE];
2133 struct aead_request *req;
2134 char *iv;
2135 unsigned int iv_len;
2136 DECLARE_CRYPTO_WAIT(wait);
2137 struct crypto_aead *tfm;
2138 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2139
2140 rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
2141 if (rc) {
2142 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
2143 enc ? "en" : "de");
2144 return 0;
2145 }
2146
2147 rc = smb3_crypto_aead_allocate(server);
2148 if (rc) {
2149 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
2150 return rc;
2151 }
2152
2153 tfm = enc ? server->secmech.ccmaesencrypt :
2154 server->secmech.ccmaesdecrypt;
2155 rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
2156 if (rc) {
2157 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
2158 return rc;
2159 }
2160
2161 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
2162 if (rc) {
2163 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
2164 return rc;
2165 }
2166
2167 req = aead_request_alloc(tfm, GFP_KERNEL);
2168 if (!req) {
2169 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
2170 return -ENOMEM;
2171 }
2172
2173 if (!enc) {
2174 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
2175 crypt_len += SMB2_SIGNATURE_SIZE;
2176 }
2177
2178 sg = init_sg(rqst, sign);
2179 if (!sg) {
2180 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
2181 rc = -ENOMEM;
2182 goto free_req;
2183 }
2184
2185 iv_len = crypto_aead_ivsize(tfm);
2186 iv = kzalloc(iv_len, GFP_KERNEL);
2187 if (!iv) {
2188 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
2189 rc = -ENOMEM;
2190 goto free_sg;
2191 }
2192 iv[0] = 3;
2193 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2194
2195 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
2196 aead_request_set_ad(req, assoc_data_len);
2197
2198 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
2199 crypto_req_done, &wait);
2200
2201 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
2202 : crypto_aead_decrypt(req), &wait);
2203
2204 if (!rc && enc)
2205 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
2206
2207 kfree(iv);
2208 free_sg:
2209 kfree(sg);
2210 free_req:
2211 kfree(req);
2212 return rc;
2213 }
2214
2215 static int
2216 smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
2217 struct smb_rqst *old_rq)
2218 {
2219 struct kvec *iov;
2220 struct page **pages;
2221 struct smb2_transform_hdr *tr_hdr;
2222 unsigned int npages = old_rq->rq_npages;
2223 int i;
2224 int rc = -ENOMEM;
2225
2226 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2227 if (!pages)
2228 return rc;
2229
2230 new_rq->rq_pages = pages;
2231 new_rq->rq_npages = old_rq->rq_npages;
2232 new_rq->rq_pagesz = old_rq->rq_pagesz;
2233 new_rq->rq_tailsz = old_rq->rq_tailsz;
2234
2235 for (i = 0; i < npages; i++) {
2236 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2237 if (!pages[i])
2238 goto err_free_pages;
2239 }
2240
2241 iov = kmalloc_array(old_rq->rq_nvec, sizeof(struct kvec), GFP_KERNEL);
2242 if (!iov)
2243 goto err_free_pages;
2244
2245 /* copy all iovs from the old except the 1st one (rfc1002 length) */
2246 memcpy(&iov[1], &old_rq->rq_iov[1],
2247 sizeof(struct kvec) * (old_rq->rq_nvec - 1));
2248 new_rq->rq_iov = iov;
2249 new_rq->rq_nvec = old_rq->rq_nvec;
2250
2251 tr_hdr = kmalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
2252 if (!tr_hdr)
2253 goto err_free_iov;
2254
2255 /* fill the 1st iov with a transform header */
2256 fill_transform_hdr(tr_hdr, old_rq);
2257 new_rq->rq_iov[0].iov_base = tr_hdr;
2258 new_rq->rq_iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2259
2260 /* copy pages form the old */
2261 for (i = 0; i < npages; i++) {
2262 char *dst = kmap(new_rq->rq_pages[i]);
2263 char *src = kmap(old_rq->rq_pages[i]);
2264 unsigned int len = (i < npages - 1) ? new_rq->rq_pagesz :
2265 new_rq->rq_tailsz;
2266 memcpy(dst, src, len);
2267 kunmap(new_rq->rq_pages[i]);
2268 kunmap(old_rq->rq_pages[i]);
2269 }
2270
2271 rc = crypt_message(server, new_rq, 1);
2272 cifs_dbg(FYI, "encrypt message returned %d", rc);
2273 if (rc)
2274 goto err_free_tr_hdr;
2275
2276 return rc;
2277
2278 err_free_tr_hdr:
2279 kfree(tr_hdr);
2280 err_free_iov:
2281 kfree(iov);
2282 err_free_pages:
2283 for (i = i - 1; i >= 0; i--)
2284 put_page(pages[i]);
2285 kfree(pages);
2286 return rc;
2287 }
2288
2289 static void
2290 smb3_free_transform_rq(struct smb_rqst *rqst)
2291 {
2292 int i = rqst->rq_npages - 1;
2293
2294 for (; i >= 0; i--)
2295 put_page(rqst->rq_pages[i]);
2296 kfree(rqst->rq_pages);
2297 /* free transform header */
2298 kfree(rqst->rq_iov[0].iov_base);
2299 kfree(rqst->rq_iov);
2300 }
2301
2302 static int
2303 smb3_is_transform_hdr(void *buf)
2304 {
2305 struct smb2_transform_hdr *trhdr = buf;
2306
2307 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
2308 }
2309
2310 static int
2311 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
2312 unsigned int buf_data_size, struct page **pages,
2313 unsigned int npages, unsigned int page_data_size)
2314 {
2315 struct kvec iov[2];
2316 struct smb_rqst rqst = {NULL};
2317 struct smb2_hdr *hdr;
2318 int rc;
2319
2320 iov[0].iov_base = buf;
2321 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2322 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
2323 iov[1].iov_len = buf_data_size;
2324
2325 rqst.rq_iov = iov;
2326 rqst.rq_nvec = 2;
2327 rqst.rq_pages = pages;
2328 rqst.rq_npages = npages;
2329 rqst.rq_pagesz = PAGE_SIZE;
2330 rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
2331
2332 rc = crypt_message(server, &rqst, 0);
2333 cifs_dbg(FYI, "decrypt message returned %d\n", rc);
2334
2335 if (rc)
2336 return rc;
2337
2338 memmove(buf + 4, iov[1].iov_base, buf_data_size);
2339 hdr = (struct smb2_hdr *)buf;
2340 hdr->smb2_buf_length = cpu_to_be32(buf_data_size + page_data_size);
2341 server->total_read = buf_data_size + page_data_size + 4;
2342
2343 return rc;
2344 }
2345
2346 static int
2347 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
2348 unsigned int npages, unsigned int len)
2349 {
2350 int i;
2351 int length;
2352
2353 for (i = 0; i < npages; i++) {
2354 struct page *page = pages[i];
2355 size_t n;
2356
2357 n = len;
2358 if (len >= PAGE_SIZE) {
2359 /* enough data to fill the page */
2360 n = PAGE_SIZE;
2361 len -= n;
2362 } else {
2363 zero_user(page, len, PAGE_SIZE - len);
2364 len = 0;
2365 }
2366 length = cifs_read_page_from_socket(server, page, n);
2367 if (length < 0)
2368 return length;
2369 server->total_read += length;
2370 }
2371
2372 return 0;
2373 }
2374
2375 static int
2376 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
2377 unsigned int cur_off, struct bio_vec **page_vec)
2378 {
2379 struct bio_vec *bvec;
2380 int i;
2381
2382 bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
2383 if (!bvec)
2384 return -ENOMEM;
2385
2386 for (i = 0; i < npages; i++) {
2387 bvec[i].bv_page = pages[i];
2388 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
2389 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
2390 data_size -= bvec[i].bv_len;
2391 }
2392
2393 if (data_size != 0) {
2394 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
2395 kfree(bvec);
2396 return -EIO;
2397 }
2398
2399 *page_vec = bvec;
2400 return 0;
2401 }
2402
2403 static int
2404 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
2405 char *buf, unsigned int buf_len, struct page **pages,
2406 unsigned int npages, unsigned int page_data_size)
2407 {
2408 unsigned int data_offset;
2409 unsigned int data_len;
2410 unsigned int cur_off;
2411 unsigned int cur_page_idx;
2412 unsigned int pad_len;
2413 struct cifs_readdata *rdata = mid->callback_data;
2414 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
2415 struct bio_vec *bvec = NULL;
2416 struct iov_iter iter;
2417 struct kvec iov;
2418 int length;
2419 bool use_rdma_mr = false;
2420
2421 if (shdr->Command != SMB2_READ) {
2422 cifs_dbg(VFS, "only big read responses are supported\n");
2423 return -ENOTSUPP;
2424 }
2425
2426 if (server->ops->is_session_expired &&
2427 server->ops->is_session_expired(buf)) {
2428 cifs_reconnect(server);
2429 wake_up(&server->response_q);
2430 return -1;
2431 }
2432
2433 if (server->ops->is_status_pending &&
2434 server->ops->is_status_pending(buf, server, 0))
2435 return -1;
2436
2437 rdata->result = server->ops->map_error(buf, false);
2438 if (rdata->result != 0) {
2439 cifs_dbg(FYI, "%s: server returned error %d\n",
2440 __func__, rdata->result);
2441 dequeue_mid(mid, rdata->result);
2442 return 0;
2443 }
2444
2445 data_offset = server->ops->read_data_offset(buf) + 4;
2446 #ifdef CONFIG_CIFS_SMB_DIRECT
2447 use_rdma_mr = rdata->mr;
2448 #endif
2449 data_len = server->ops->read_data_length(buf, use_rdma_mr);
2450
2451 if (data_offset < server->vals->read_rsp_size) {
2452 /*
2453 * win2k8 sometimes sends an offset of 0 when the read
2454 * is beyond the EOF. Treat it as if the data starts just after
2455 * the header.
2456 */
2457 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
2458 __func__, data_offset);
2459 data_offset = server->vals->read_rsp_size;
2460 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
2461 /* data_offset is beyond the end of smallbuf */
2462 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
2463 __func__, data_offset);
2464 rdata->result = -EIO;
2465 dequeue_mid(mid, rdata->result);
2466 return 0;
2467 }
2468
2469 pad_len = data_offset - server->vals->read_rsp_size;
2470
2471 if (buf_len <= data_offset) {
2472 /* read response payload is in pages */
2473 cur_page_idx = pad_len / PAGE_SIZE;
2474 cur_off = pad_len % PAGE_SIZE;
2475
2476 if (cur_page_idx != 0) {
2477 /* data offset is beyond the 1st page of response */
2478 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
2479 __func__, data_offset);
2480 rdata->result = -EIO;
2481 dequeue_mid(mid, rdata->result);
2482 return 0;
2483 }
2484
2485 if (data_len > page_data_size - pad_len) {
2486 /* data_len is corrupt -- discard frame */
2487 rdata->result = -EIO;
2488 dequeue_mid(mid, rdata->result);
2489 return 0;
2490 }
2491
2492 rdata->result = init_read_bvec(pages, npages, page_data_size,
2493 cur_off, &bvec);
2494 if (rdata->result != 0) {
2495 dequeue_mid(mid, rdata->result);
2496 return 0;
2497 }
2498
2499 iov_iter_bvec(&iter, WRITE | ITER_BVEC, bvec, npages, data_len);
2500 } else if (buf_len >= data_offset + data_len) {
2501 /* read response payload is in buf */
2502 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
2503 iov.iov_base = buf + data_offset;
2504 iov.iov_len = data_len;
2505 iov_iter_kvec(&iter, WRITE | ITER_KVEC, &iov, 1, data_len);
2506 } else {
2507 /* read response payload cannot be in both buf and pages */
2508 WARN_ONCE(1, "buf can not contain only a part of read data");
2509 rdata->result = -EIO;
2510 dequeue_mid(mid, rdata->result);
2511 return 0;
2512 }
2513
2514 /* set up first iov for signature check */
2515 rdata->iov[0].iov_base = buf;
2516 rdata->iov[0].iov_len = 4;
2517 rdata->iov[1].iov_base = buf + 4;
2518 rdata->iov[1].iov_len = server->vals->read_rsp_size - 4;
2519 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
2520 rdata->iov[0].iov_base, server->vals->read_rsp_size);
2521
2522 length = rdata->copy_into_pages(server, rdata, &iter);
2523
2524 kfree(bvec);
2525
2526 if (length < 0)
2527 return length;
2528
2529 dequeue_mid(mid, false);
2530 return length;
2531 }
2532
2533 static int
2534 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2535 {
2536 char *buf = server->smallbuf;
2537 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2538 unsigned int npages;
2539 struct page **pages;
2540 unsigned int len;
2541 unsigned int buflen = get_rfc1002_length(buf) + 4;
2542 int rc;
2543 int i = 0;
2544
2545 len = min_t(unsigned int, buflen, server->vals->read_rsp_size - 4 +
2546 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
2547
2548 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
2549 if (rc < 0)
2550 return rc;
2551 server->total_read += rc;
2552
2553 len = le32_to_cpu(tr_hdr->OriginalMessageSize) + 4 -
2554 server->vals->read_rsp_size;
2555 npages = DIV_ROUND_UP(len, PAGE_SIZE);
2556
2557 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2558 if (!pages) {
2559 rc = -ENOMEM;
2560 goto discard_data;
2561 }
2562
2563 for (; i < npages; i++) {
2564 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2565 if (!pages[i]) {
2566 rc = -ENOMEM;
2567 goto discard_data;
2568 }
2569 }
2570
2571 /* read read data into pages */
2572 rc = read_data_into_pages(server, pages, npages, len);
2573 if (rc)
2574 goto free_pages;
2575
2576 rc = cifs_discard_remaining_data(server);
2577 if (rc)
2578 goto free_pages;
2579
2580 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size - 4,
2581 pages, npages, len);
2582 if (rc)
2583 goto free_pages;
2584
2585 *mid = smb2_find_mid(server, buf);
2586 if (*mid == NULL)
2587 cifs_dbg(FYI, "mid not found\n");
2588 else {
2589 cifs_dbg(FYI, "mid found\n");
2590 (*mid)->decrypted = true;
2591 rc = handle_read_data(server, *mid, buf,
2592 server->vals->read_rsp_size,
2593 pages, npages, len);
2594 }
2595
2596 free_pages:
2597 for (i = i - 1; i >= 0; i--)
2598 put_page(pages[i]);
2599 kfree(pages);
2600 return rc;
2601 discard_data:
2602 cifs_discard_remaining_data(server);
2603 goto free_pages;
2604 }
2605
2606 static int
2607 receive_encrypted_standard(struct TCP_Server_Info *server,
2608 struct mid_q_entry **mid)
2609 {
2610 int length;
2611 char *buf = server->smallbuf;
2612 unsigned int pdu_length = get_rfc1002_length(buf);
2613 unsigned int buf_size;
2614 struct mid_q_entry *mid_entry;
2615
2616 /* switch to large buffer if too big for a small one */
2617 if (pdu_length + 4 > MAX_CIFS_SMALL_BUFFER_SIZE) {
2618 server->large_buf = true;
2619 memcpy(server->bigbuf, buf, server->total_read);
2620 buf = server->bigbuf;
2621 }
2622
2623 /* now read the rest */
2624 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
2625 pdu_length - HEADER_SIZE(server) + 1 + 4);
2626 if (length < 0)
2627 return length;
2628 server->total_read += length;
2629
2630 buf_size = pdu_length + 4 - sizeof(struct smb2_transform_hdr);
2631 length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
2632 if (length)
2633 return length;
2634
2635 mid_entry = smb2_find_mid(server, buf);
2636 if (mid_entry == NULL)
2637 cifs_dbg(FYI, "mid not found\n");
2638 else {
2639 cifs_dbg(FYI, "mid found\n");
2640 mid_entry->decrypted = true;
2641 }
2642
2643 *mid = mid_entry;
2644
2645 if (mid_entry && mid_entry->handle)
2646 return mid_entry->handle(server, mid_entry);
2647
2648 return cifs_handle_standard(server, mid_entry);
2649 }
2650
2651 static int
2652 smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2653 {
2654 char *buf = server->smallbuf;
2655 unsigned int pdu_length = get_rfc1002_length(buf);
2656 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2657 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2658
2659 if (pdu_length + 4 < sizeof(struct smb2_transform_hdr) +
2660 sizeof(struct smb2_sync_hdr)) {
2661 cifs_dbg(VFS, "Transform message is too small (%u)\n",
2662 pdu_length);
2663 cifs_reconnect(server);
2664 wake_up(&server->response_q);
2665 return -ECONNABORTED;
2666 }
2667
2668 if (pdu_length + 4 < orig_len + sizeof(struct smb2_transform_hdr)) {
2669 cifs_dbg(VFS, "Transform message is broken\n");
2670 cifs_reconnect(server);
2671 wake_up(&server->response_q);
2672 return -ECONNABORTED;
2673 }
2674
2675 if (pdu_length + 4 > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
2676 return receive_encrypted_read(server, mid);
2677
2678 return receive_encrypted_standard(server, mid);
2679 }
2680
2681 int
2682 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
2683 {
2684 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
2685
2686 return handle_read_data(server, mid, buf, get_rfc1002_length(buf) + 4,
2687 NULL, 0, 0);
2688 }
2689
2690 struct smb_version_operations smb20_operations = {
2691 .compare_fids = smb2_compare_fids,
2692 .setup_request = smb2_setup_request,
2693 .setup_async_request = smb2_setup_async_request,
2694 .check_receive = smb2_check_receive,
2695 .add_credits = smb2_add_credits,
2696 .set_credits = smb2_set_credits,
2697 .get_credits_field = smb2_get_credits_field,
2698 .get_credits = smb2_get_credits,
2699 .wait_mtu_credits = cifs_wait_mtu_credits,
2700 .get_next_mid = smb2_get_next_mid,
2701 .read_data_offset = smb2_read_data_offset,
2702 .read_data_length = smb2_read_data_length,
2703 .map_error = map_smb2_to_linux_error,
2704 .find_mid = smb2_find_mid,
2705 .check_message = smb2_check_message,
2706 .dump_detail = smb2_dump_detail,
2707 .clear_stats = smb2_clear_stats,
2708 .print_stats = smb2_print_stats,
2709 .is_oplock_break = smb2_is_valid_oplock_break,
2710 .handle_cancelled_mid = smb2_handle_cancelled_mid,
2711 .downgrade_oplock = smb2_downgrade_oplock,
2712 .need_neg = smb2_need_neg,
2713 .negotiate = smb2_negotiate,
2714 .negotiate_wsize = smb2_negotiate_wsize,
2715 .negotiate_rsize = smb2_negotiate_rsize,
2716 .sess_setup = SMB2_sess_setup,
2717 .logoff = SMB2_logoff,
2718 .tree_connect = SMB2_tcon,
2719 .tree_disconnect = SMB2_tdis,
2720 .qfs_tcon = smb2_qfs_tcon,
2721 .is_path_accessible = smb2_is_path_accessible,
2722 .can_echo = smb2_can_echo,
2723 .echo = SMB2_echo,
2724 .query_path_info = smb2_query_path_info,
2725 .get_srv_inum = smb2_get_srv_inum,
2726 .query_file_info = smb2_query_file_info,
2727 .set_path_size = smb2_set_path_size,
2728 .set_file_size = smb2_set_file_size,
2729 .set_file_info = smb2_set_file_info,
2730 .set_compression = smb2_set_compression,
2731 .mkdir = smb2_mkdir,
2732 .mkdir_setinfo = smb2_mkdir_setinfo,
2733 .rmdir = smb2_rmdir,
2734 .unlink = smb2_unlink,
2735 .rename = smb2_rename_path,
2736 .create_hardlink = smb2_create_hardlink,
2737 .query_symlink = smb2_query_symlink,
2738 .query_mf_symlink = smb3_query_mf_symlink,
2739 .create_mf_symlink = smb3_create_mf_symlink,
2740 .open = smb2_open_file,
2741 .set_fid = smb2_set_fid,
2742 .close = smb2_close_file,
2743 .flush = smb2_flush_file,
2744 .async_readv = smb2_async_readv,
2745 .async_writev = smb2_async_writev,
2746 .sync_read = smb2_sync_read,
2747 .sync_write = smb2_sync_write,
2748 .query_dir_first = smb2_query_dir_first,
2749 .query_dir_next = smb2_query_dir_next,
2750 .close_dir = smb2_close_dir,
2751 .calc_smb_size = smb2_calc_size,
2752 .is_status_pending = smb2_is_status_pending,
2753 .is_session_expired = smb2_is_session_expired,
2754 .oplock_response = smb2_oplock_response,
2755 .queryfs = smb2_queryfs,
2756 .mand_lock = smb2_mand_lock,
2757 .mand_unlock_range = smb2_unlock_range,
2758 .push_mand_locks = smb2_push_mandatory_locks,
2759 .get_lease_key = smb2_get_lease_key,
2760 .set_lease_key = smb2_set_lease_key,
2761 .new_lease_key = smb2_new_lease_key,
2762 .calc_signature = smb2_calc_signature,
2763 .is_read_op = smb2_is_read_op,
2764 .set_oplock_level = smb2_set_oplock_level,
2765 .create_lease_buf = smb2_create_lease_buf,
2766 .parse_lease_buf = smb2_parse_lease_buf,
2767 .copychunk_range = smb2_copychunk_range,
2768 .wp_retry_size = smb2_wp_retry_size,
2769 .dir_needs_close = smb2_dir_needs_close,
2770 .get_dfs_refer = smb2_get_dfs_refer,
2771 .select_sectype = smb2_select_sectype,
2772 #ifdef CONFIG_CIFS_XATTR
2773 .query_all_EAs = smb2_query_eas,
2774 .set_EA = smb2_set_ea,
2775 #endif /* CIFS_XATTR */
2776 #ifdef CONFIG_CIFS_ACL
2777 .get_acl = get_smb2_acl,
2778 .get_acl_by_fid = get_smb2_acl_by_fid,
2779 .set_acl = set_smb2_acl,
2780 #endif /* CIFS_ACL */
2781 };
2782
2783 struct smb_version_operations smb21_operations = {
2784 .compare_fids = smb2_compare_fids,
2785 .setup_request = smb2_setup_request,
2786 .setup_async_request = smb2_setup_async_request,
2787 .check_receive = smb2_check_receive,
2788 .add_credits = smb2_add_credits,
2789 .set_credits = smb2_set_credits,
2790 .get_credits_field = smb2_get_credits_field,
2791 .get_credits = smb2_get_credits,
2792 .wait_mtu_credits = smb2_wait_mtu_credits,
2793 .get_next_mid = smb2_get_next_mid,
2794 .read_data_offset = smb2_read_data_offset,
2795 .read_data_length = smb2_read_data_length,
2796 .map_error = map_smb2_to_linux_error,
2797 .find_mid = smb2_find_mid,
2798 .check_message = smb2_check_message,
2799 .dump_detail = smb2_dump_detail,
2800 .clear_stats = smb2_clear_stats,
2801 .print_stats = smb2_print_stats,
2802 .is_oplock_break = smb2_is_valid_oplock_break,
2803 .handle_cancelled_mid = smb2_handle_cancelled_mid,
2804 .downgrade_oplock = smb2_downgrade_oplock,
2805 .need_neg = smb2_need_neg,
2806 .negotiate = smb2_negotiate,
2807 .negotiate_wsize = smb2_negotiate_wsize,
2808 .negotiate_rsize = smb2_negotiate_rsize,
2809 .sess_setup = SMB2_sess_setup,
2810 .logoff = SMB2_logoff,
2811 .tree_connect = SMB2_tcon,
2812 .tree_disconnect = SMB2_tdis,
2813 .qfs_tcon = smb2_qfs_tcon,
2814 .is_path_accessible = smb2_is_path_accessible,
2815 .can_echo = smb2_can_echo,
2816 .echo = SMB2_echo,
2817 .query_path_info = smb2_query_path_info,
2818 .get_srv_inum = smb2_get_srv_inum,
2819 .query_file_info = smb2_query_file_info,
2820 .set_path_size = smb2_set_path_size,
2821 .set_file_size = smb2_set_file_size,
2822 .set_file_info = smb2_set_file_info,
2823 .set_compression = smb2_set_compression,
2824 .mkdir = smb2_mkdir,
2825 .mkdir_setinfo = smb2_mkdir_setinfo,
2826 .rmdir = smb2_rmdir,
2827 .unlink = smb2_unlink,
2828 .rename = smb2_rename_path,
2829 .create_hardlink = smb2_create_hardlink,
2830 .query_symlink = smb2_query_symlink,
2831 .query_mf_symlink = smb3_query_mf_symlink,
2832 .create_mf_symlink = smb3_create_mf_symlink,
2833 .open = smb2_open_file,
2834 .set_fid = smb2_set_fid,
2835 .close = smb2_close_file,
2836 .flush = smb2_flush_file,
2837 .async_readv = smb2_async_readv,
2838 .async_writev = smb2_async_writev,
2839 .sync_read = smb2_sync_read,
2840 .sync_write = smb2_sync_write,
2841 .query_dir_first = smb2_query_dir_first,
2842 .query_dir_next = smb2_query_dir_next,
2843 .close_dir = smb2_close_dir,
2844 .calc_smb_size = smb2_calc_size,
2845 .is_status_pending = smb2_is_status_pending,
2846 .is_session_expired = smb2_is_session_expired,
2847 .oplock_response = smb2_oplock_response,
2848 .queryfs = smb2_queryfs,
2849 .mand_lock = smb2_mand_lock,
2850 .mand_unlock_range = smb2_unlock_range,
2851 .push_mand_locks = smb2_push_mandatory_locks,
2852 .get_lease_key = smb2_get_lease_key,
2853 .set_lease_key = smb2_set_lease_key,
2854 .new_lease_key = smb2_new_lease_key,
2855 .calc_signature = smb2_calc_signature,
2856 .is_read_op = smb21_is_read_op,
2857 .set_oplock_level = smb21_set_oplock_level,
2858 .create_lease_buf = smb2_create_lease_buf,
2859 .parse_lease_buf = smb2_parse_lease_buf,
2860 .copychunk_range = smb2_copychunk_range,
2861 .wp_retry_size = smb2_wp_retry_size,
2862 .dir_needs_close = smb2_dir_needs_close,
2863 .enum_snapshots = smb3_enum_snapshots,
2864 .get_dfs_refer = smb2_get_dfs_refer,
2865 .select_sectype = smb2_select_sectype,
2866 #ifdef CONFIG_CIFS_XATTR
2867 .query_all_EAs = smb2_query_eas,
2868 .set_EA = smb2_set_ea,
2869 #endif /* CIFS_XATTR */
2870 #ifdef CONFIG_CIFS_ACL
2871 .get_acl = get_smb2_acl,
2872 .get_acl_by_fid = get_smb2_acl_by_fid,
2873 .set_acl = set_smb2_acl,
2874 #endif /* CIFS_ACL */
2875 };
2876
2877 struct smb_version_operations smb30_operations = {
2878 .compare_fids = smb2_compare_fids,
2879 .setup_request = smb2_setup_request,
2880 .setup_async_request = smb2_setup_async_request,
2881 .check_receive = smb2_check_receive,
2882 .add_credits = smb2_add_credits,
2883 .set_credits = smb2_set_credits,
2884 .get_credits_field = smb2_get_credits_field,
2885 .get_credits = smb2_get_credits,
2886 .wait_mtu_credits = smb2_wait_mtu_credits,
2887 .get_next_mid = smb2_get_next_mid,
2888 .read_data_offset = smb2_read_data_offset,
2889 .read_data_length = smb2_read_data_length,
2890 .map_error = map_smb2_to_linux_error,
2891 .find_mid = smb2_find_mid,
2892 .check_message = smb2_check_message,
2893 .dump_detail = smb2_dump_detail,
2894 .clear_stats = smb2_clear_stats,
2895 .print_stats = smb2_print_stats,
2896 .dump_share_caps = smb2_dump_share_caps,
2897 .is_oplock_break = smb2_is_valid_oplock_break,
2898 .handle_cancelled_mid = smb2_handle_cancelled_mid,
2899 .downgrade_oplock = smb2_downgrade_oplock,
2900 .need_neg = smb2_need_neg,
2901 .negotiate = smb2_negotiate,
2902 .negotiate_wsize = smb2_negotiate_wsize,
2903 .negotiate_rsize = smb2_negotiate_rsize,
2904 .sess_setup = SMB2_sess_setup,
2905 .logoff = SMB2_logoff,
2906 .tree_connect = SMB2_tcon,
2907 .tree_disconnect = SMB2_tdis,
2908 .qfs_tcon = smb3_qfs_tcon,
2909 .is_path_accessible = smb2_is_path_accessible,
2910 .can_echo = smb2_can_echo,
2911 .echo = SMB2_echo,
2912 .query_path_info = smb2_query_path_info,
2913 .get_srv_inum = smb2_get_srv_inum,
2914 .query_file_info = smb2_query_file_info,
2915 .set_path_size = smb2_set_path_size,
2916 .set_file_size = smb2_set_file_size,
2917 .set_file_info = smb2_set_file_info,
2918 .set_compression = smb2_set_compression,
2919 .mkdir = smb2_mkdir,
2920 .mkdir_setinfo = smb2_mkdir_setinfo,
2921 .rmdir = smb2_rmdir,
2922 .unlink = smb2_unlink,
2923 .rename = smb2_rename_path,
2924 .create_hardlink = smb2_create_hardlink,
2925 .query_symlink = smb2_query_symlink,
2926 .query_mf_symlink = smb3_query_mf_symlink,
2927 .create_mf_symlink = smb3_create_mf_symlink,
2928 .open = smb2_open_file,
2929 .set_fid = smb2_set_fid,
2930 .close = smb2_close_file,
2931 .flush = smb2_flush_file,
2932 .async_readv = smb2_async_readv,
2933 .async_writev = smb2_async_writev,
2934 .sync_read = smb2_sync_read,
2935 .sync_write = smb2_sync_write,
2936 .query_dir_first = smb2_query_dir_first,
2937 .query_dir_next = smb2_query_dir_next,
2938 .close_dir = smb2_close_dir,
2939 .calc_smb_size = smb2_calc_size,
2940 .is_status_pending = smb2_is_status_pending,
2941 .is_session_expired = smb2_is_session_expired,
2942 .oplock_response = smb2_oplock_response,
2943 .queryfs = smb2_queryfs,
2944 .mand_lock = smb2_mand_lock,
2945 .mand_unlock_range = smb2_unlock_range,
2946 .push_mand_locks = smb2_push_mandatory_locks,
2947 .get_lease_key = smb2_get_lease_key,
2948 .set_lease_key = smb2_set_lease_key,
2949 .new_lease_key = smb2_new_lease_key,
2950 .generate_signingkey = generate_smb30signingkey,
2951 .calc_signature = smb3_calc_signature,
2952 .set_integrity = smb3_set_integrity,
2953 .is_read_op = smb21_is_read_op,
2954 .set_oplock_level = smb3_set_oplock_level,
2955 .create_lease_buf = smb3_create_lease_buf,
2956 .parse_lease_buf = smb3_parse_lease_buf,
2957 .copychunk_range = smb2_copychunk_range,
2958 .duplicate_extents = smb2_duplicate_extents,
2959 .validate_negotiate = smb3_validate_negotiate,
2960 .wp_retry_size = smb2_wp_retry_size,
2961 .dir_needs_close = smb2_dir_needs_close,
2962 .fallocate = smb3_fallocate,
2963 .enum_snapshots = smb3_enum_snapshots,
2964 .init_transform_rq = smb3_init_transform_rq,
2965 .free_transform_rq = smb3_free_transform_rq,
2966 .is_transform_hdr = smb3_is_transform_hdr,
2967 .receive_transform = smb3_receive_transform,
2968 .get_dfs_refer = smb2_get_dfs_refer,
2969 .select_sectype = smb2_select_sectype,
2970 #ifdef CONFIG_CIFS_XATTR
2971 .query_all_EAs = smb2_query_eas,
2972 .set_EA = smb2_set_ea,
2973 #endif /* CIFS_XATTR */
2974 #ifdef CONFIG_CIFS_ACL
2975 .get_acl = get_smb2_acl,
2976 .get_acl_by_fid = get_smb2_acl_by_fid,
2977 .set_acl = set_smb2_acl,
2978 #endif /* CIFS_ACL */
2979 };
2980
2981 #ifdef CONFIG_CIFS_SMB311
2982 struct smb_version_operations smb311_operations = {
2983 .compare_fids = smb2_compare_fids,
2984 .setup_request = smb2_setup_request,
2985 .setup_async_request = smb2_setup_async_request,
2986 .check_receive = smb2_check_receive,
2987 .add_credits = smb2_add_credits,
2988 .set_credits = smb2_set_credits,
2989 .get_credits_field = smb2_get_credits_field,
2990 .get_credits = smb2_get_credits,
2991 .wait_mtu_credits = smb2_wait_mtu_credits,
2992 .get_next_mid = smb2_get_next_mid,
2993 .read_data_offset = smb2_read_data_offset,
2994 .read_data_length = smb2_read_data_length,
2995 .map_error = map_smb2_to_linux_error,
2996 .find_mid = smb2_find_mid,
2997 .check_message = smb2_check_message,
2998 .dump_detail = smb2_dump_detail,
2999 .clear_stats = smb2_clear_stats,
3000 .print_stats = smb2_print_stats,
3001 .dump_share_caps = smb2_dump_share_caps,
3002 .is_oplock_break = smb2_is_valid_oplock_break,
3003 .handle_cancelled_mid = smb2_handle_cancelled_mid,
3004 .downgrade_oplock = smb2_downgrade_oplock,
3005 .need_neg = smb2_need_neg,
3006 .negotiate = smb2_negotiate,
3007 .negotiate_wsize = smb2_negotiate_wsize,
3008 .negotiate_rsize = smb2_negotiate_rsize,
3009 .sess_setup = SMB2_sess_setup,
3010 .logoff = SMB2_logoff,
3011 .tree_connect = SMB2_tcon,
3012 .tree_disconnect = SMB2_tdis,
3013 .qfs_tcon = smb3_qfs_tcon,
3014 .is_path_accessible = smb2_is_path_accessible,
3015 .can_echo = smb2_can_echo,
3016 .echo = SMB2_echo,
3017 .query_path_info = smb2_query_path_info,
3018 .get_srv_inum = smb2_get_srv_inum,
3019 .query_file_info = smb2_query_file_info,
3020 .set_path_size = smb2_set_path_size,
3021 .set_file_size = smb2_set_file_size,
3022 .set_file_info = smb2_set_file_info,
3023 .set_compression = smb2_set_compression,
3024 .mkdir = smb2_mkdir,
3025 .mkdir_setinfo = smb2_mkdir_setinfo,
3026 .rmdir = smb2_rmdir,
3027 .unlink = smb2_unlink,
3028 .rename = smb2_rename_path,
3029 .create_hardlink = smb2_create_hardlink,
3030 .query_symlink = smb2_query_symlink,
3031 .query_mf_symlink = smb3_query_mf_symlink,
3032 .create_mf_symlink = smb3_create_mf_symlink,
3033 .open = smb2_open_file,
3034 .set_fid = smb2_set_fid,
3035 .close = smb2_close_file,
3036 .flush = smb2_flush_file,
3037 .async_readv = smb2_async_readv,
3038 .async_writev = smb2_async_writev,
3039 .sync_read = smb2_sync_read,
3040 .sync_write = smb2_sync_write,
3041 .query_dir_first = smb2_query_dir_first,
3042 .query_dir_next = smb2_query_dir_next,
3043 .close_dir = smb2_close_dir,
3044 .calc_smb_size = smb2_calc_size,
3045 .is_status_pending = smb2_is_status_pending,
3046 .is_session_expired = smb2_is_session_expired,
3047 .oplock_response = smb2_oplock_response,
3048 .queryfs = smb2_queryfs,
3049 .mand_lock = smb2_mand_lock,
3050 .mand_unlock_range = smb2_unlock_range,
3051 .push_mand_locks = smb2_push_mandatory_locks,
3052 .get_lease_key = smb2_get_lease_key,
3053 .set_lease_key = smb2_set_lease_key,
3054 .new_lease_key = smb2_new_lease_key,
3055 .generate_signingkey = generate_smb311signingkey,
3056 .calc_signature = smb3_calc_signature,
3057 .set_integrity = smb3_set_integrity,
3058 .is_read_op = smb21_is_read_op,
3059 .set_oplock_level = smb3_set_oplock_level,
3060 .create_lease_buf = smb3_create_lease_buf,
3061 .parse_lease_buf = smb3_parse_lease_buf,
3062 .copychunk_range = smb2_copychunk_range,
3063 .duplicate_extents = smb2_duplicate_extents,
3064 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
3065 .wp_retry_size = smb2_wp_retry_size,
3066 .dir_needs_close = smb2_dir_needs_close,
3067 .fallocate = smb3_fallocate,
3068 .enum_snapshots = smb3_enum_snapshots,
3069 .init_transform_rq = smb3_init_transform_rq,
3070 .free_transform_rq = smb3_free_transform_rq,
3071 .is_transform_hdr = smb3_is_transform_hdr,
3072 .receive_transform = smb3_receive_transform,
3073 .get_dfs_refer = smb2_get_dfs_refer,
3074 .select_sectype = smb2_select_sectype,
3075 #ifdef CONFIG_CIFS_XATTR
3076 .query_all_EAs = smb2_query_eas,
3077 .set_EA = smb2_set_ea,
3078 #endif /* CIFS_XATTR */
3079 };
3080 #endif /* CIFS_SMB311 */
3081
3082 struct smb_version_values smb20_values = {
3083 .version_string = SMB20_VERSION_STRING,
3084 .protocol_id = SMB20_PROT_ID,
3085 .req_capabilities = 0, /* MBZ */
3086 .large_lock_type = 0,
3087 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3088 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3089 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3090 .header_size = sizeof(struct smb2_hdr),
3091 .max_header_size = MAX_SMB2_HDR_SIZE,
3092 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3093 .lock_cmd = SMB2_LOCK,
3094 .cap_unix = 0,
3095 .cap_nt_find = SMB2_NT_FIND,
3096 .cap_large_files = SMB2_LARGE_FILES,
3097 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3098 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3099 .create_lease_size = sizeof(struct create_lease),
3100 };
3101
3102 struct smb_version_values smb21_values = {
3103 .version_string = SMB21_VERSION_STRING,
3104 .protocol_id = SMB21_PROT_ID,
3105 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
3106 .large_lock_type = 0,
3107 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3108 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3109 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3110 .header_size = sizeof(struct smb2_hdr),
3111 .max_header_size = MAX_SMB2_HDR_SIZE,
3112 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3113 .lock_cmd = SMB2_LOCK,
3114 .cap_unix = 0,
3115 .cap_nt_find = SMB2_NT_FIND,
3116 .cap_large_files = SMB2_LARGE_FILES,
3117 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3118 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3119 .create_lease_size = sizeof(struct create_lease),
3120 };
3121
3122 struct smb_version_values smb3any_values = {
3123 .version_string = SMB3ANY_VERSION_STRING,
3124 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3125 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3126 .large_lock_type = 0,
3127 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3128 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3129 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3130 .header_size = sizeof(struct smb2_hdr),
3131 .max_header_size = MAX_SMB2_HDR_SIZE,
3132 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3133 .lock_cmd = SMB2_LOCK,
3134 .cap_unix = 0,
3135 .cap_nt_find = SMB2_NT_FIND,
3136 .cap_large_files = SMB2_LARGE_FILES,
3137 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3138 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3139 .create_lease_size = sizeof(struct create_lease_v2),
3140 };
3141
3142 struct smb_version_values smbdefault_values = {
3143 .version_string = SMBDEFAULT_VERSION_STRING,
3144 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3145 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3146 .large_lock_type = 0,
3147 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3148 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3149 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3150 .header_size = sizeof(struct smb2_hdr),
3151 .max_header_size = MAX_SMB2_HDR_SIZE,
3152 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3153 .lock_cmd = SMB2_LOCK,
3154 .cap_unix = 0,
3155 .cap_nt_find = SMB2_NT_FIND,
3156 .cap_large_files = SMB2_LARGE_FILES,
3157 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3158 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3159 .create_lease_size = sizeof(struct create_lease_v2),
3160 };
3161
3162 struct smb_version_values smb30_values = {
3163 .version_string = SMB30_VERSION_STRING,
3164 .protocol_id = SMB30_PROT_ID,
3165 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3166 .large_lock_type = 0,
3167 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3168 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3169 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3170 .header_size = sizeof(struct smb2_hdr),
3171 .max_header_size = MAX_SMB2_HDR_SIZE,
3172 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3173 .lock_cmd = SMB2_LOCK,
3174 .cap_unix = 0,
3175 .cap_nt_find = SMB2_NT_FIND,
3176 .cap_large_files = SMB2_LARGE_FILES,
3177 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3178 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3179 .create_lease_size = sizeof(struct create_lease_v2),
3180 };
3181
3182 struct smb_version_values smb302_values = {
3183 .version_string = SMB302_VERSION_STRING,
3184 .protocol_id = SMB302_PROT_ID,
3185 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3186 .large_lock_type = 0,
3187 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3188 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3189 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3190 .header_size = sizeof(struct smb2_hdr),
3191 .max_header_size = MAX_SMB2_HDR_SIZE,
3192 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3193 .lock_cmd = SMB2_LOCK,
3194 .cap_unix = 0,
3195 .cap_nt_find = SMB2_NT_FIND,
3196 .cap_large_files = SMB2_LARGE_FILES,
3197 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3198 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3199 .create_lease_size = sizeof(struct create_lease_v2),
3200 };
3201
3202 #ifdef CONFIG_CIFS_SMB311
3203 struct smb_version_values smb311_values = {
3204 .version_string = SMB311_VERSION_STRING,
3205 .protocol_id = SMB311_PROT_ID,
3206 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3207 .large_lock_type = 0,
3208 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3209 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3210 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3211 .header_size = sizeof(struct smb2_hdr),
3212 .max_header_size = MAX_SMB2_HDR_SIZE,
3213 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3214 .lock_cmd = SMB2_LOCK,
3215 .cap_unix = 0,
3216 .cap_nt_find = SMB2_NT_FIND,
3217 .cap_large_files = SMB2_LARGE_FILES,
3218 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3219 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3220 .create_lease_size = sizeof(struct create_lease_v2),
3221 };
3222 #endif /* SMB311 */
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