]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - fs/cifs/smb2ops.c
projects / mirror_ubuntu-bionic-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge tag 'reset-fixes-for-4.14' of git://git.pengutronix.de/git/pza/linux into fixes
[mirror_ubuntu-bionic-kernel.git] / fs / cifs / smb2ops.c
1 /*
2 * SMB2 version specific operations
3 *
4 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
5 *
6 * This library is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License v2 as published
8 * by the Free Software Foundation.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public License
16 * along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20 #include <linux/pagemap.h>
21 #include <linux/vfs.h>
22 #include <linux/falloc.h>
23 #include <linux/scatterlist.h>
24 #include <linux/uuid.h>
25 #include <crypto/aead.h>
26 #include "cifsglob.h"
27 #include "smb2pdu.h"
28 #include "smb2proto.h"
29 #include "cifsproto.h"
30 #include "cifs_debug.h"
31 #include "cifs_unicode.h"
32 #include "smb2status.h"
33 #include "smb2glob.h"
34 #include "cifs_ioctl.h"
35
36 static int
37 change_conf(struct TCP_Server_Info *server)
38 {
39 server->credits += server->echo_credits + server->oplock_credits;
40 server->oplock_credits = server->echo_credits = 0;
41 switch (server->credits) {
42 case 0:
43 return -1;
44 case 1:
45 server->echoes = false;
46 server->oplocks = false;
47 cifs_dbg(VFS, "disabling echoes and oplocks\n");
48 break;
49 case 2:
50 server->echoes = true;
51 server->oplocks = false;
52 server->echo_credits = 1;
53 cifs_dbg(FYI, "disabling oplocks\n");
54 break;
55 default:
56 server->echoes = true;
57 if (enable_oplocks) {
58 server->oplocks = true;
59 server->oplock_credits = 1;
60 } else
61 server->oplocks = false;
62
63 server->echo_credits = 1;
64 }
65 server->credits -= server->echo_credits + server->oplock_credits;
66 return 0;
67 }
68
69 static void
70 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
71 const int optype)
72 {
73 int *val, rc = 0;
74 spin_lock(&server->req_lock);
75 val = server->ops->get_credits_field(server, optype);
76 *val += add;
77 if (*val > 65000) {
78 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
79 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
80 }
81 server->in_flight--;
82 if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
83 rc = change_conf(server);
84 /*
85 * Sometimes server returns 0 credits on oplock break ack - we need to
86 * rebalance credits in this case.
87 */
88 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
89 server->oplocks) {
90 if (server->credits > 1) {
91 server->credits--;
92 server->oplock_credits++;
93 }
94 }
95 spin_unlock(&server->req_lock);
96 wake_up(&server->request_q);
97 if (rc)
98 cifs_reconnect(server);
99 }
100
101 static void
102 smb2_set_credits(struct TCP_Server_Info *server, const int val)
103 {
104 spin_lock(&server->req_lock);
105 server->credits = val;
106 spin_unlock(&server->req_lock);
107 }
108
109 static int *
110 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
111 {
112 switch (optype) {
113 case CIFS_ECHO_OP:
114 return &server->echo_credits;
115 case CIFS_OBREAK_OP:
116 return &server->oplock_credits;
117 default:
118 return &server->credits;
119 }
120 }
121
122 static unsigned int
123 smb2_get_credits(struct mid_q_entry *mid)
124 {
125 struct smb2_sync_hdr *shdr = get_sync_hdr(mid->resp_buf);
126
127 return le16_to_cpu(shdr->CreditRequest);
128 }
129
130 static int
131 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
132 unsigned int *num, unsigned int *credits)
133 {
134 int rc = 0;
135 unsigned int scredits;
136
137 spin_lock(&server->req_lock);
138 while (1) {
139 if (server->credits <= 0) {
140 spin_unlock(&server->req_lock);
141 cifs_num_waiters_inc(server);
142 rc = wait_event_killable(server->request_q,
143 has_credits(server, &server->credits));
144 cifs_num_waiters_dec(server);
145 if (rc)
146 return rc;
147 spin_lock(&server->req_lock);
148 } else {
149 if (server->tcpStatus == CifsExiting) {
150 spin_unlock(&server->req_lock);
151 return -ENOENT;
152 }
153
154 scredits = server->credits;
155 /* can deadlock with reopen */
156 if (scredits == 1) {
157 *num = SMB2_MAX_BUFFER_SIZE;
158 *credits = 0;
159 break;
160 }
161
162 /* leave one credit for a possible reopen */
163 scredits--;
164 *num = min_t(unsigned int, size,
165 scredits * SMB2_MAX_BUFFER_SIZE);
166
167 *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
168 server->credits -= *credits;
169 server->in_flight++;
170 break;
171 }
172 }
173 spin_unlock(&server->req_lock);
174 return rc;
175 }
176
177 static __u64
178 smb2_get_next_mid(struct TCP_Server_Info *server)
179 {
180 __u64 mid;
181 /* for SMB2 we need the current value */
182 spin_lock(&GlobalMid_Lock);
183 mid = server->CurrentMid++;
184 spin_unlock(&GlobalMid_Lock);
185 return mid;
186 }
187
188 static struct mid_q_entry *
189 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
190 {
191 struct mid_q_entry *mid;
192 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
193 __u64 wire_mid = le64_to_cpu(shdr->MessageId);
194
195 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
196 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
197 return NULL;
198 }
199
200 spin_lock(&GlobalMid_Lock);
201 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
202 if ((mid->mid == wire_mid) &&
203 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
204 (mid->command == shdr->Command)) {
205 spin_unlock(&GlobalMid_Lock);
206 return mid;
207 }
208 }
209 spin_unlock(&GlobalMid_Lock);
210 return NULL;
211 }
212
213 static void
214 smb2_dump_detail(void *buf)
215 {
216 #ifdef CONFIG_CIFS_DEBUG2
217 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
218
219 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
220 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
221 shdr->ProcessId);
222 cifs_dbg(VFS, "smb buf %p len %u\n", buf, smb2_calc_size(buf));
223 #endif
224 }
225
226 static bool
227 smb2_need_neg(struct TCP_Server_Info *server)
228 {
229 return server->max_read == 0;
230 }
231
232 static int
233 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
234 {
235 int rc;
236 ses->server->CurrentMid = 0;
237 rc = SMB2_negotiate(xid, ses);
238 /* BB we probably don't need to retry with modern servers */
239 if (rc == -EAGAIN)
240 rc = -EHOSTDOWN;
241 return rc;
242 }
243
244 static unsigned int
245 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
246 {
247 struct TCP_Server_Info *server = tcon->ses->server;
248 unsigned int wsize;
249
250 /* start with specified wsize, or default */
251 wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
252 wsize = min_t(unsigned int, wsize, server->max_write);
253
254 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
255 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
256
257 return wsize;
258 }
259
260 static unsigned int
261 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
262 {
263 struct TCP_Server_Info *server = tcon->ses->server;
264 unsigned int rsize;
265
266 /* start with specified rsize, or default */
267 rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
268 rsize = min_t(unsigned int, rsize, server->max_read);
269
270 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
271 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
272
273 return rsize;
274 }
275
276 #ifdef CONFIG_CIFS_STATS2
277 static int
278 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
279 {
280 int rc;
281 unsigned int ret_data_len = 0;
282 struct network_interface_info_ioctl_rsp *out_buf;
283
284 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
285 FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
286 false /* use_ipc */,
287 NULL /* no data input */, 0 /* no data input */,
288 (char **)&out_buf, &ret_data_len);
289 if (rc != 0)
290 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
291 else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
292 cifs_dbg(VFS, "server returned bad net interface info buf\n");
293 rc = -EINVAL;
294 } else {
295 /* Dump info on first interface */
296 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
297 le32_to_cpu(out_buf->Capability));
298 cifs_dbg(FYI, "Link Speed %lld\n",
299 le64_to_cpu(out_buf->LinkSpeed));
300 }
301 kfree(out_buf);
302 return rc;
303 }
304 #endif /* STATS2 */
305
306 static void
307 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
308 {
309 int rc;
310 __le16 srch_path = 0; /* Null - open root of share */
311 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
312 struct cifs_open_parms oparms;
313 struct cifs_fid fid;
314
315 oparms.tcon = tcon;
316 oparms.desired_access = FILE_READ_ATTRIBUTES;
317 oparms.disposition = FILE_OPEN;
318 oparms.create_options = 0;
319 oparms.fid = &fid;
320 oparms.reconnect = false;
321
322 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
323 if (rc)
324 return;
325
326 #ifdef CONFIG_CIFS_STATS2
327 SMB3_request_interfaces(xid, tcon);
328 #endif /* STATS2 */
329
330 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
331 FS_ATTRIBUTE_INFORMATION);
332 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
333 FS_DEVICE_INFORMATION);
334 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
335 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
336 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
337 return;
338 }
339
340 static void
341 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
342 {
343 int rc;
344 __le16 srch_path = 0; /* Null - open root of share */
345 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
346 struct cifs_open_parms oparms;
347 struct cifs_fid fid;
348
349 oparms.tcon = tcon;
350 oparms.desired_access = FILE_READ_ATTRIBUTES;
351 oparms.disposition = FILE_OPEN;
352 oparms.create_options = 0;
353 oparms.fid = &fid;
354 oparms.reconnect = false;
355
356 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
357 if (rc)
358 return;
359
360 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
361 FS_ATTRIBUTE_INFORMATION);
362 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
363 FS_DEVICE_INFORMATION);
364 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
365 return;
366 }
367
368 static int
369 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
370 struct cifs_sb_info *cifs_sb, const char *full_path)
371 {
372 int rc;
373 __le16 *utf16_path;
374 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
375 struct cifs_open_parms oparms;
376 struct cifs_fid fid;
377
378 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
379 if (!utf16_path)
380 return -ENOMEM;
381
382 oparms.tcon = tcon;
383 oparms.desired_access = FILE_READ_ATTRIBUTES;
384 oparms.disposition = FILE_OPEN;
385 oparms.create_options = 0;
386 oparms.fid = &fid;
387 oparms.reconnect = false;
388
389 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
390 if (rc) {
391 kfree(utf16_path);
392 return rc;
393 }
394
395 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
396 kfree(utf16_path);
397 return rc;
398 }
399
400 static int
401 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
402 struct cifs_sb_info *cifs_sb, const char *full_path,
403 u64 *uniqueid, FILE_ALL_INFO *data)
404 {
405 *uniqueid = le64_to_cpu(data->IndexNumber);
406 return 0;
407 }
408
409 static int
410 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
411 struct cifs_fid *fid, FILE_ALL_INFO *data)
412 {
413 int rc;
414 struct smb2_file_all_info *smb2_data;
415
416 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
417 GFP_KERNEL);
418 if (smb2_data == NULL)
419 return -ENOMEM;
420
421 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
422 smb2_data);
423 if (!rc)
424 move_smb2_info_to_cifs(data, smb2_data);
425 kfree(smb2_data);
426 return rc;
427 }
428
429 #ifdef CONFIG_CIFS_XATTR
430 static ssize_t
431 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
432 struct smb2_file_full_ea_info *src, size_t src_size,
433 const unsigned char *ea_name)
434 {
435 int rc = 0;
436 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
437 char *name, *value;
438 size_t name_len, value_len, user_name_len;
439
440 while (src_size > 0) {
441 name = &src->ea_data[0];
442 name_len = (size_t)src->ea_name_length;
443 value = &src->ea_data[src->ea_name_length + 1];
444 value_len = (size_t)le16_to_cpu(src->ea_value_length);
445
446 if (name_len == 0) {
447 break;
448 }
449
450 if (src_size < 8 + name_len + 1 + value_len) {
451 cifs_dbg(FYI, "EA entry goes beyond length of list\n");
452 rc = -EIO;
453 goto out;
454 }
455
456 if (ea_name) {
457 if (ea_name_len == name_len &&
458 memcmp(ea_name, name, name_len) == 0) {
459 rc = value_len;
460 if (dst_size == 0)
461 goto out;
462 if (dst_size < value_len) {
463 rc = -ERANGE;
464 goto out;
465 }
466 memcpy(dst, value, value_len);
467 goto out;
468 }
469 } else {
470 /* 'user.' plus a terminating null */
471 user_name_len = 5 + 1 + name_len;
472
473 rc += user_name_len;
474
475 if (dst_size >= user_name_len) {
476 dst_size -= user_name_len;
477 memcpy(dst, "user.", 5);
478 dst += 5;
479 memcpy(dst, src->ea_data, name_len);
480 dst += name_len;
481 *dst = 0;
482 ++dst;
483 } else if (dst_size == 0) {
484 /* skip copy - calc size only */
485 } else {
486 /* stop before overrun buffer */
487 rc = -ERANGE;
488 break;
489 }
490 }
491
492 if (!src->next_entry_offset)
493 break;
494
495 if (src_size < le32_to_cpu(src->next_entry_offset)) {
496 /* stop before overrun buffer */
497 rc = -ERANGE;
498 break;
499 }
500 src_size -= le32_to_cpu(src->next_entry_offset);
501 src = (void *)((char *)src +
502 le32_to_cpu(src->next_entry_offset));
503 }
504
505 /* didn't find the named attribute */
506 if (ea_name)
507 rc = -ENODATA;
508
509 out:
510 return (ssize_t)rc;
511 }
512
513 static ssize_t
514 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
515 const unsigned char *path, const unsigned char *ea_name,
516 char *ea_data, size_t buf_size,
517 struct cifs_sb_info *cifs_sb)
518 {
519 int rc;
520 __le16 *utf16_path;
521 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
522 struct cifs_open_parms oparms;
523 struct cifs_fid fid;
524 struct smb2_file_full_ea_info *smb2_data;
525
526 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
527 if (!utf16_path)
528 return -ENOMEM;
529
530 oparms.tcon = tcon;
531 oparms.desired_access = FILE_READ_EA;
532 oparms.disposition = FILE_OPEN;
533 oparms.create_options = 0;
534 oparms.fid = &fid;
535 oparms.reconnect = false;
536
537 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
538 kfree(utf16_path);
539 if (rc) {
540 cifs_dbg(FYI, "open failed rc=%d\n", rc);
541 return rc;
542 }
543
544 smb2_data = kzalloc(SMB2_MAX_EA_BUF, GFP_KERNEL);
545 if (smb2_data == NULL) {
546 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
547 return -ENOMEM;
548 }
549
550 rc = SMB2_query_eas(xid, tcon, fid.persistent_fid, fid.volatile_fid,
551 smb2_data);
552 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
553
554 if (!rc)
555 rc = move_smb2_ea_to_cifs(ea_data, buf_size, smb2_data,
556 SMB2_MAX_EA_BUF, ea_name);
557
558 kfree(smb2_data);
559 return rc;
560 }
561
562
563 static int
564 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
565 const char *path, const char *ea_name, const void *ea_value,
566 const __u16 ea_value_len, const struct nls_table *nls_codepage,
567 struct cifs_sb_info *cifs_sb)
568 {
569 int rc;
570 __le16 *utf16_path;
571 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
572 struct cifs_open_parms oparms;
573 struct cifs_fid fid;
574 struct smb2_file_full_ea_info *ea;
575 int ea_name_len = strlen(ea_name);
576 int len;
577
578 if (ea_name_len > 255)
579 return -EINVAL;
580
581 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
582 if (!utf16_path)
583 return -ENOMEM;
584
585 oparms.tcon = tcon;
586 oparms.desired_access = FILE_WRITE_EA;
587 oparms.disposition = FILE_OPEN;
588 oparms.create_options = 0;
589 oparms.fid = &fid;
590 oparms.reconnect = false;
591
592 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
593 kfree(utf16_path);
594 if (rc) {
595 cifs_dbg(FYI, "open failed rc=%d\n", rc);
596 return rc;
597 }
598
599 len = sizeof(ea) + ea_name_len + ea_value_len + 1;
600 ea = kzalloc(len, GFP_KERNEL);
601 if (ea == NULL) {
602 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
603 return -ENOMEM;
604 }
605
606 ea->ea_name_length = ea_name_len;
607 ea->ea_value_length = cpu_to_le16(ea_value_len);
608 memcpy(ea->ea_data, ea_name, ea_name_len + 1);
609 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
610
611 rc = SMB2_set_ea(xid, tcon, fid.persistent_fid, fid.volatile_fid, ea,
612 len);
613 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
614
615 return rc;
616 }
617 #endif
618
619 static bool
620 smb2_can_echo(struct TCP_Server_Info *server)
621 {
622 return server->echoes;
623 }
624
625 static void
626 smb2_clear_stats(struct cifs_tcon *tcon)
627 {
628 #ifdef CONFIG_CIFS_STATS
629 int i;
630 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
631 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
632 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
633 }
634 #endif
635 }
636
637 static void
638 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
639 {
640 seq_puts(m, "\n\tShare Capabilities:");
641 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
642 seq_puts(m, " DFS,");
643 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
644 seq_puts(m, " CONTINUOUS AVAILABILITY,");
645 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
646 seq_puts(m, " SCALEOUT,");
647 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
648 seq_puts(m, " CLUSTER,");
649 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
650 seq_puts(m, " ASYMMETRIC,");
651 if (tcon->capabilities == 0)
652 seq_puts(m, " None");
653 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
654 seq_puts(m, " Aligned,");
655 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
656 seq_puts(m, " Partition Aligned,");
657 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
658 seq_puts(m, " SSD,");
659 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
660 seq_puts(m, " TRIM-support,");
661
662 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
663 if (tcon->perf_sector_size)
664 seq_printf(m, "\tOptimal sector size: 0x%x",
665 tcon->perf_sector_size);
666 }
667
668 static void
669 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
670 {
671 #ifdef CONFIG_CIFS_STATS
672 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
673 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
674 seq_printf(m, "\nNegotiates: %d sent %d failed",
675 atomic_read(&sent[SMB2_NEGOTIATE_HE]),
676 atomic_read(&failed[SMB2_NEGOTIATE_HE]));
677 seq_printf(m, "\nSessionSetups: %d sent %d failed",
678 atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
679 atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
680 seq_printf(m, "\nLogoffs: %d sent %d failed",
681 atomic_read(&sent[SMB2_LOGOFF_HE]),
682 atomic_read(&failed[SMB2_LOGOFF_HE]));
683 seq_printf(m, "\nTreeConnects: %d sent %d failed",
684 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
685 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
686 seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
687 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
688 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
689 seq_printf(m, "\nCreates: %d sent %d failed",
690 atomic_read(&sent[SMB2_CREATE_HE]),
691 atomic_read(&failed[SMB2_CREATE_HE]));
692 seq_printf(m, "\nCloses: %d sent %d failed",
693 atomic_read(&sent[SMB2_CLOSE_HE]),
694 atomic_read(&failed[SMB2_CLOSE_HE]));
695 seq_printf(m, "\nFlushes: %d sent %d failed",
696 atomic_read(&sent[SMB2_FLUSH_HE]),
697 atomic_read(&failed[SMB2_FLUSH_HE]));
698 seq_printf(m, "\nReads: %d sent %d failed",
699 atomic_read(&sent[SMB2_READ_HE]),
700 atomic_read(&failed[SMB2_READ_HE]));
701 seq_printf(m, "\nWrites: %d sent %d failed",
702 atomic_read(&sent[SMB2_WRITE_HE]),
703 atomic_read(&failed[SMB2_WRITE_HE]));
704 seq_printf(m, "\nLocks: %d sent %d failed",
705 atomic_read(&sent[SMB2_LOCK_HE]),
706 atomic_read(&failed[SMB2_LOCK_HE]));
707 seq_printf(m, "\nIOCTLs: %d sent %d failed",
708 atomic_read(&sent[SMB2_IOCTL_HE]),
709 atomic_read(&failed[SMB2_IOCTL_HE]));
710 seq_printf(m, "\nCancels: %d sent %d failed",
711 atomic_read(&sent[SMB2_CANCEL_HE]),
712 atomic_read(&failed[SMB2_CANCEL_HE]));
713 seq_printf(m, "\nEchos: %d sent %d failed",
714 atomic_read(&sent[SMB2_ECHO_HE]),
715 atomic_read(&failed[SMB2_ECHO_HE]));
716 seq_printf(m, "\nQueryDirectories: %d sent %d failed",
717 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
718 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
719 seq_printf(m, "\nChangeNotifies: %d sent %d failed",
720 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
721 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
722 seq_printf(m, "\nQueryInfos: %d sent %d failed",
723 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
724 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
725 seq_printf(m, "\nSetInfos: %d sent %d failed",
726 atomic_read(&sent[SMB2_SET_INFO_HE]),
727 atomic_read(&failed[SMB2_SET_INFO_HE]));
728 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
729 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
730 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
731 #endif
732 }
733
734 static void
735 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
736 {
737 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
738 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
739
740 cfile->fid.persistent_fid = fid->persistent_fid;
741 cfile->fid.volatile_fid = fid->volatile_fid;
742 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
743 &fid->purge_cache);
744 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
745 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
746 }
747
748 static void
749 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
750 struct cifs_fid *fid)
751 {
752 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
753 }
754
755 static int
756 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
757 u64 persistent_fid, u64 volatile_fid,
758 struct copychunk_ioctl *pcchunk)
759 {
760 int rc;
761 unsigned int ret_data_len;
762 struct resume_key_req *res_key;
763
764 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
765 FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
766 false /* use_ipc */,
767 NULL, 0 /* no input */,
768 (char **)&res_key, &ret_data_len);
769
770 if (rc) {
771 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
772 goto req_res_key_exit;
773 }
774 if (ret_data_len < sizeof(struct resume_key_req)) {
775 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
776 rc = -EINVAL;
777 goto req_res_key_exit;
778 }
779 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
780
781 req_res_key_exit:
782 kfree(res_key);
783 return rc;
784 }
785
786 static ssize_t
787 smb2_copychunk_range(const unsigned int xid,
788 struct cifsFileInfo *srcfile,
789 struct cifsFileInfo *trgtfile, u64 src_off,
790 u64 len, u64 dest_off)
791 {
792 int rc;
793 unsigned int ret_data_len;
794 struct copychunk_ioctl *pcchunk;
795 struct copychunk_ioctl_rsp *retbuf = NULL;
796 struct cifs_tcon *tcon;
797 int chunks_copied = 0;
798 bool chunk_sizes_updated = false;
799 ssize_t bytes_written, total_bytes_written = 0;
800
801 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
802
803 if (pcchunk == NULL)
804 return -ENOMEM;
805
806 cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
807 /* Request a key from the server to identify the source of the copy */
808 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
809 srcfile->fid.persistent_fid,
810 srcfile->fid.volatile_fid, pcchunk);
811
812 /* Note: request_res_key sets res_key null only if rc !=0 */
813 if (rc)
814 goto cchunk_out;
815
816 /* For now array only one chunk long, will make more flexible later */
817 pcchunk->ChunkCount = cpu_to_le32(1);
818 pcchunk->Reserved = 0;
819 pcchunk->Reserved2 = 0;
820
821 tcon = tlink_tcon(trgtfile->tlink);
822
823 while (len > 0) {
824 pcchunk->SourceOffset = cpu_to_le64(src_off);
825 pcchunk->TargetOffset = cpu_to_le64(dest_off);
826 pcchunk->Length =
827 cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
828
829 /* Request server copy to target from src identified by key */
830 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
831 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
832 true /* is_fsctl */, false /* use_ipc */,
833 (char *)pcchunk,
834 sizeof(struct copychunk_ioctl), (char **)&retbuf,
835 &ret_data_len);
836 if (rc == 0) {
837 if (ret_data_len !=
838 sizeof(struct copychunk_ioctl_rsp)) {
839 cifs_dbg(VFS, "invalid cchunk response size\n");
840 rc = -EIO;
841 goto cchunk_out;
842 }
843 if (retbuf->TotalBytesWritten == 0) {
844 cifs_dbg(FYI, "no bytes copied\n");
845 rc = -EIO;
846 goto cchunk_out;
847 }
848 /*
849 * Check if server claimed to write more than we asked
850 */
851 if (le32_to_cpu(retbuf->TotalBytesWritten) >
852 le32_to_cpu(pcchunk->Length)) {
853 cifs_dbg(VFS, "invalid copy chunk response\n");
854 rc = -EIO;
855 goto cchunk_out;
856 }
857 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
858 cifs_dbg(VFS, "invalid num chunks written\n");
859 rc = -EIO;
860 goto cchunk_out;
861 }
862 chunks_copied++;
863
864 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
865 src_off += bytes_written;
866 dest_off += bytes_written;
867 len -= bytes_written;
868 total_bytes_written += bytes_written;
869
870 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
871 le32_to_cpu(retbuf->ChunksWritten),
872 le32_to_cpu(retbuf->ChunkBytesWritten),
873 bytes_written);
874 } else if (rc == -EINVAL) {
875 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
876 goto cchunk_out;
877
878 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
879 le32_to_cpu(retbuf->ChunksWritten),
880 le32_to_cpu(retbuf->ChunkBytesWritten),
881 le32_to_cpu(retbuf->TotalBytesWritten));
882
883 /*
884 * Check if this is the first request using these sizes,
885 * (ie check if copy succeed once with original sizes
886 * and check if the server gave us different sizes after
887 * we already updated max sizes on previous request).
888 * if not then why is the server returning an error now
889 */
890 if ((chunks_copied != 0) || chunk_sizes_updated)
891 goto cchunk_out;
892
893 /* Check that server is not asking us to grow size */
894 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
895 tcon->max_bytes_chunk)
896 tcon->max_bytes_chunk =
897 le32_to_cpu(retbuf->ChunkBytesWritten);
898 else
899 goto cchunk_out; /* server gave us bogus size */
900
901 /* No need to change MaxChunks since already set to 1 */
902 chunk_sizes_updated = true;
903 } else
904 goto cchunk_out;
905 }
906
907 cchunk_out:
908 kfree(pcchunk);
909 kfree(retbuf);
910 if (rc)
911 return rc;
912 else
913 return total_bytes_written;
914 }
915
916 static int
917 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
918 struct cifs_fid *fid)
919 {
920 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
921 }
922
923 static unsigned int
924 smb2_read_data_offset(char *buf)
925 {
926 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
927 return rsp->DataOffset;
928 }
929
930 static unsigned int
931 smb2_read_data_length(char *buf)
932 {
933 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
934 return le32_to_cpu(rsp->DataLength);
935 }
936
937
938 static int
939 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
940 struct cifs_io_parms *parms, unsigned int *bytes_read,
941 char **buf, int *buf_type)
942 {
943 parms->persistent_fid = pfid->persistent_fid;
944 parms->volatile_fid = pfid->volatile_fid;
945 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
946 }
947
948 static int
949 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
950 struct cifs_io_parms *parms, unsigned int *written,
951 struct kvec *iov, unsigned long nr_segs)
952 {
953
954 parms->persistent_fid = pfid->persistent_fid;
955 parms->volatile_fid = pfid->volatile_fid;
956 return SMB2_write(xid, parms, written, iov, nr_segs);
957 }
958
959 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
960 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
961 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
962 {
963 struct cifsInodeInfo *cifsi;
964 int rc;
965
966 cifsi = CIFS_I(inode);
967
968 /* if file already sparse don't bother setting sparse again */
969 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
970 return true; /* already sparse */
971
972 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
973 return true; /* already not sparse */
974
975 /*
976 * Can't check for sparse support on share the usual way via the
977 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
978 * since Samba server doesn't set the flag on the share, yet
979 * supports the set sparse FSCTL and returns sparse correctly
980 * in the file attributes. If we fail setting sparse though we
981 * mark that server does not support sparse files for this share
982 * to avoid repeatedly sending the unsupported fsctl to server
983 * if the file is repeatedly extended.
984 */
985 if (tcon->broken_sparse_sup)
986 return false;
987
988 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
989 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
990 true /* is_fctl */, false /* use_ipc */,
991 &setsparse, 1, NULL, NULL);
992 if (rc) {
993 tcon->broken_sparse_sup = true;
994 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
995 return false;
996 }
997
998 if (setsparse)
999 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1000 else
1001 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1002
1003 return true;
1004 }
1005
1006 static int
1007 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1008 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1009 {
1010 __le64 eof = cpu_to_le64(size);
1011 struct inode *inode;
1012
1013 /*
1014 * If extending file more than one page make sparse. Many Linux fs
1015 * make files sparse by default when extending via ftruncate
1016 */
1017 inode = d_inode(cfile->dentry);
1018
1019 if (!set_alloc && (size > inode->i_size + 8192)) {
1020 __u8 set_sparse = 1;
1021
1022 /* whether set sparse succeeds or not, extend the file */
1023 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1024 }
1025
1026 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1027 cfile->fid.volatile_fid, cfile->pid, &eof, false);
1028 }
1029
1030 static int
1031 smb2_duplicate_extents(const unsigned int xid,
1032 struct cifsFileInfo *srcfile,
1033 struct cifsFileInfo *trgtfile, u64 src_off,
1034 u64 len, u64 dest_off)
1035 {
1036 int rc;
1037 unsigned int ret_data_len;
1038 struct duplicate_extents_to_file dup_ext_buf;
1039 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1040
1041 /* server fileays advertise duplicate extent support with this flag */
1042 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1043 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1044 return -EOPNOTSUPP;
1045
1046 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1047 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1048 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1049 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1050 dup_ext_buf.ByteCount = cpu_to_le64(len);
1051 cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
1052 src_off, dest_off, len);
1053
1054 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1055 if (rc)
1056 goto duplicate_extents_out;
1057
1058 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1059 trgtfile->fid.volatile_fid,
1060 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1061 true /* is_fsctl */, false /* use_ipc */,
1062 (char *)&dup_ext_buf,
1063 sizeof(struct duplicate_extents_to_file),
1064 NULL,
1065 &ret_data_len);
1066
1067 if (ret_data_len > 0)
1068 cifs_dbg(FYI, "non-zero response length in duplicate extents");
1069
1070 duplicate_extents_out:
1071 return rc;
1072 }
1073
1074 static int
1075 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1076 struct cifsFileInfo *cfile)
1077 {
1078 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1079 cfile->fid.volatile_fid);
1080 }
1081
1082 static int
1083 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1084 struct cifsFileInfo *cfile)
1085 {
1086 struct fsctl_set_integrity_information_req integr_info;
1087 unsigned int ret_data_len;
1088
1089 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1090 integr_info.Flags = 0;
1091 integr_info.Reserved = 0;
1092
1093 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1094 cfile->fid.volatile_fid,
1095 FSCTL_SET_INTEGRITY_INFORMATION,
1096 true /* is_fsctl */, false /* use_ipc */,
1097 (char *)&integr_info,
1098 sizeof(struct fsctl_set_integrity_information_req),
1099 NULL,
1100 &ret_data_len);
1101
1102 }
1103
1104 static int
1105 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1106 struct cifsFileInfo *cfile, void __user *ioc_buf)
1107 {
1108 char *retbuf = NULL;
1109 unsigned int ret_data_len = 0;
1110 int rc;
1111 struct smb_snapshot_array snapshot_in;
1112
1113 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1114 cfile->fid.volatile_fid,
1115 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
1116 true /* is_fsctl */, false /* use_ipc */,
1117 NULL, 0 /* no input data */,
1118 (char **)&retbuf,
1119 &ret_data_len);
1120 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1121 rc, ret_data_len);
1122 if (rc)
1123 return rc;
1124
1125 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
1126 /* Fixup buffer */
1127 if (copy_from_user(&snapshot_in, ioc_buf,
1128 sizeof(struct smb_snapshot_array))) {
1129 rc = -EFAULT;
1130 kfree(retbuf);
1131 return rc;
1132 }
1133 if (snapshot_in.snapshot_array_size < sizeof(struct smb_snapshot_array)) {
1134 rc = -ERANGE;
1135 kfree(retbuf);
1136 return rc;
1137 }
1138
1139 if (ret_data_len > snapshot_in.snapshot_array_size)
1140 ret_data_len = snapshot_in.snapshot_array_size;
1141
1142 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
1143 rc = -EFAULT;
1144 }
1145
1146 kfree(retbuf);
1147 return rc;
1148 }
1149
1150 static int
1151 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
1152 const char *path, struct cifs_sb_info *cifs_sb,
1153 struct cifs_fid *fid, __u16 search_flags,
1154 struct cifs_search_info *srch_inf)
1155 {
1156 __le16 *utf16_path;
1157 int rc;
1158 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1159 struct cifs_open_parms oparms;
1160
1161 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1162 if (!utf16_path)
1163 return -ENOMEM;
1164
1165 oparms.tcon = tcon;
1166 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
1167 oparms.disposition = FILE_OPEN;
1168 oparms.create_options = 0;
1169 oparms.fid = fid;
1170 oparms.reconnect = false;
1171
1172 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1173 kfree(utf16_path);
1174 if (rc) {
1175 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
1176 return rc;
1177 }
1178
1179 srch_inf->entries_in_buffer = 0;
1180 srch_inf->index_of_last_entry = 0;
1181
1182 rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
1183 fid->volatile_fid, 0, srch_inf);
1184 if (rc) {
1185 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
1186 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1187 }
1188 return rc;
1189 }
1190
1191 static int
1192 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1193 struct cifs_fid *fid, __u16 search_flags,
1194 struct cifs_search_info *srch_inf)
1195 {
1196 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1197 fid->volatile_fid, 0, srch_inf);
1198 }
1199
1200 static int
1201 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1202 struct cifs_fid *fid)
1203 {
1204 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1205 }
1206
1207 /*
1208 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
1209 * the number of credits and return true. Otherwise - return false.
1210 */
1211 static bool
1212 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1213 {
1214 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
1215
1216 if (shdr->Status != STATUS_PENDING)
1217 return false;
1218
1219 if (!length) {
1220 spin_lock(&server->req_lock);
1221 server->credits += le16_to_cpu(shdr->CreditRequest);
1222 spin_unlock(&server->req_lock);
1223 wake_up(&server->request_q);
1224 }
1225
1226 return true;
1227 }
1228
1229 static bool
1230 smb2_is_session_expired(char *buf)
1231 {
1232 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
1233
1234 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED)
1235 return false;
1236
1237 cifs_dbg(FYI, "Session expired\n");
1238 return true;
1239 }
1240
1241 static int
1242 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1243 struct cifsInodeInfo *cinode)
1244 {
1245 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1246 return SMB2_lease_break(0, tcon, cinode->lease_key,
1247 smb2_get_lease_state(cinode));
1248
1249 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1250 fid->volatile_fid,
1251 CIFS_CACHE_READ(cinode) ? 1 : 0);
1252 }
1253
1254 static int
1255 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1256 struct kstatfs *buf)
1257 {
1258 int rc;
1259 __le16 srch_path = 0; /* Null - open root of share */
1260 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1261 struct cifs_open_parms oparms;
1262 struct cifs_fid fid;
1263
1264 oparms.tcon = tcon;
1265 oparms.desired_access = FILE_READ_ATTRIBUTES;
1266 oparms.disposition = FILE_OPEN;
1267 oparms.create_options = 0;
1268 oparms.fid = &fid;
1269 oparms.reconnect = false;
1270
1271 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
1272 if (rc)
1273 return rc;
1274 buf->f_type = SMB2_MAGIC_NUMBER;
1275 rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1276 buf);
1277 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1278 return rc;
1279 }
1280
1281 static bool
1282 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1283 {
1284 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1285 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1286 }
1287
1288 static int
1289 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1290 __u64 length, __u32 type, int lock, int unlock, bool wait)
1291 {
1292 if (unlock && !lock)
1293 type = SMB2_LOCKFLAG_UNLOCK;
1294 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1295 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1296 current->tgid, length, offset, type, wait);
1297 }
1298
1299 static void
1300 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1301 {
1302 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1303 }
1304
1305 static void
1306 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1307 {
1308 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1309 }
1310
1311 static void
1312 smb2_new_lease_key(struct cifs_fid *fid)
1313 {
1314 generate_random_uuid(fid->lease_key);
1315 }
1316
1317 static int
1318 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
1319 const char *search_name,
1320 struct dfs_info3_param **target_nodes,
1321 unsigned int *num_of_nodes,
1322 const struct nls_table *nls_codepage, int remap)
1323 {
1324 int rc;
1325 __le16 *utf16_path = NULL;
1326 int utf16_path_len = 0;
1327 struct cifs_tcon *tcon;
1328 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
1329 struct get_dfs_referral_rsp *dfs_rsp = NULL;
1330 u32 dfs_req_size = 0, dfs_rsp_size = 0;
1331
1332 cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
1333
1334 /*
1335 * Use any tcon from the current session. Here, the first one.
1336 */
1337 spin_lock(&cifs_tcp_ses_lock);
1338 tcon = list_first_entry_or_null(&ses->tcon_list, struct cifs_tcon,
1339 tcon_list);
1340 if (tcon)
1341 tcon->tc_count++;
1342 spin_unlock(&cifs_tcp_ses_lock);
1343
1344 if (!tcon) {
1345 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
1346 ses);
1347 rc = -ENOTCONN;
1348 goto out;
1349 }
1350
1351 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
1352 &utf16_path_len,
1353 nls_codepage, remap);
1354 if (!utf16_path) {
1355 rc = -ENOMEM;
1356 goto out;
1357 }
1358
1359 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
1360 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
1361 if (!dfs_req) {
1362 rc = -ENOMEM;
1363 goto out;
1364 }
1365
1366 /* Highest DFS referral version understood */
1367 dfs_req->MaxReferralLevel = DFS_VERSION;
1368
1369 /* Path to resolve in an UTF-16 null-terminated string */
1370 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
1371
1372 do {
1373 /* try first with IPC */
1374 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1375 FSCTL_DFS_GET_REFERRALS,
1376 true /* is_fsctl */, true /* use_ipc */,
1377 (char *)dfs_req, dfs_req_size,
1378 (char **)&dfs_rsp, &dfs_rsp_size);
1379 if (rc == -ENOTCONN) {
1380 /* try with normal tcon */
1381 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1382 FSCTL_DFS_GET_REFERRALS,
1383 true /* is_fsctl */, false /*use_ipc*/,
1384 (char *)dfs_req, dfs_req_size,
1385 (char **)&dfs_rsp, &dfs_rsp_size);
1386 }
1387 } while (rc == -EAGAIN);
1388
1389 if (rc) {
1390 cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
1391 goto out;
1392 }
1393
1394 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
1395 num_of_nodes, target_nodes,
1396 nls_codepage, remap, search_name,
1397 true /* is_unicode */);
1398 if (rc) {
1399 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
1400 goto out;
1401 }
1402
1403 out:
1404 if (tcon) {
1405 spin_lock(&cifs_tcp_ses_lock);
1406 tcon->tc_count--;
1407 spin_unlock(&cifs_tcp_ses_lock);
1408 }
1409 kfree(utf16_path);
1410 kfree(dfs_req);
1411 kfree(dfs_rsp);
1412 return rc;
1413 }
1414 #define SMB2_SYMLINK_STRUCT_SIZE \
1415 (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1416
1417 static int
1418 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1419 const char *full_path, char **target_path,
1420 struct cifs_sb_info *cifs_sb)
1421 {
1422 int rc;
1423 __le16 *utf16_path;
1424 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1425 struct cifs_open_parms oparms;
1426 struct cifs_fid fid;
1427 struct smb2_err_rsp *err_buf = NULL;
1428 struct smb2_symlink_err_rsp *symlink;
1429 unsigned int sub_len;
1430 unsigned int sub_offset;
1431 unsigned int print_len;
1432 unsigned int print_offset;
1433
1434 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1435
1436 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1437 if (!utf16_path)
1438 return -ENOMEM;
1439
1440 oparms.tcon = tcon;
1441 oparms.desired_access = FILE_READ_ATTRIBUTES;
1442 oparms.disposition = FILE_OPEN;
1443 oparms.create_options = 0;
1444 oparms.fid = &fid;
1445 oparms.reconnect = false;
1446
1447 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1448
1449 if (!rc || !err_buf) {
1450 kfree(utf16_path);
1451 return -ENOENT;
1452 }
1453
1454 if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1455 get_rfc1002_length(err_buf) + 4 < SMB2_SYMLINK_STRUCT_SIZE) {
1456 kfree(utf16_path);
1457 return -ENOENT;
1458 }
1459
1460 /* open must fail on symlink - reset rc */
1461 rc = 0;
1462 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1463 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1464 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1465 print_len = le16_to_cpu(symlink->PrintNameLength);
1466 print_offset = le16_to_cpu(symlink->PrintNameOffset);
1467
1468 if (get_rfc1002_length(err_buf) + 4 <
1469 SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1470 kfree(utf16_path);
1471 return -ENOENT;
1472 }
1473
1474 if (get_rfc1002_length(err_buf) + 4 <
1475 SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1476 kfree(utf16_path);
1477 return -ENOENT;
1478 }
1479
1480 *target_path = cifs_strndup_from_utf16(
1481 (char *)symlink->PathBuffer + sub_offset,
1482 sub_len, true, cifs_sb->local_nls);
1483 if (!(*target_path)) {
1484 kfree(utf16_path);
1485 return -ENOMEM;
1486 }
1487 convert_delimiter(*target_path, '/');
1488 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1489 kfree(utf16_path);
1490 return rc;
1491 }
1492
1493 #ifdef CONFIG_CIFS_ACL
1494 static struct cifs_ntsd *
1495 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
1496 const struct cifs_fid *cifsfid, u32 *pacllen)
1497 {
1498 struct cifs_ntsd *pntsd = NULL;
1499 unsigned int xid;
1500 int rc = -EOPNOTSUPP;
1501 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1502
1503 if (IS_ERR(tlink))
1504 return ERR_CAST(tlink);
1505
1506 xid = get_xid();
1507 cifs_dbg(FYI, "trying to get acl\n");
1508
1509 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
1510 cifsfid->volatile_fid, (void **)&pntsd, pacllen);
1511 free_xid(xid);
1512
1513 cifs_put_tlink(tlink);
1514
1515 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1516 if (rc)
1517 return ERR_PTR(rc);
1518 return pntsd;
1519
1520 }
1521
1522 static struct cifs_ntsd *
1523 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
1524 const char *path, u32 *pacllen)
1525 {
1526 struct cifs_ntsd *pntsd = NULL;
1527 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1528 unsigned int xid;
1529 int rc;
1530 struct cifs_tcon *tcon;
1531 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1532 struct cifs_fid fid;
1533 struct cifs_open_parms oparms;
1534 __le16 *utf16_path;
1535
1536 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
1537 if (IS_ERR(tlink))
1538 return ERR_CAST(tlink);
1539
1540 tcon = tlink_tcon(tlink);
1541 xid = get_xid();
1542
1543 if (backup_cred(cifs_sb))
1544 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1545 else
1546 oparms.create_options = 0;
1547
1548 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1549 if (!utf16_path)
1550 return ERR_PTR(-ENOMEM);
1551
1552 oparms.tcon = tcon;
1553 oparms.desired_access = READ_CONTROL;
1554 oparms.disposition = FILE_OPEN;
1555 oparms.fid = &fid;
1556 oparms.reconnect = false;
1557
1558 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1559 kfree(utf16_path);
1560 if (!rc) {
1561 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1562 fid.volatile_fid, (void **)&pntsd, pacllen);
1563 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1564 }
1565
1566 cifs_put_tlink(tlink);
1567 free_xid(xid);
1568
1569 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1570 if (rc)
1571 return ERR_PTR(rc);
1572 return pntsd;
1573 }
1574
1575 #ifdef CONFIG_CIFS_ACL
1576 static int
1577 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
1578 struct inode *inode, const char *path, int aclflag)
1579 {
1580 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1581 unsigned int xid;
1582 int rc, access_flags = 0;
1583 struct cifs_tcon *tcon;
1584 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1585 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1586 struct cifs_fid fid;
1587 struct cifs_open_parms oparms;
1588 __le16 *utf16_path;
1589
1590 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
1591 if (IS_ERR(tlink))
1592 return PTR_ERR(tlink);
1593
1594 tcon = tlink_tcon(tlink);
1595 xid = get_xid();
1596
1597 if (backup_cred(cifs_sb))
1598 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1599 else
1600 oparms.create_options = 0;
1601
1602 if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
1603 access_flags = WRITE_OWNER;
1604 else
1605 access_flags = WRITE_DAC;
1606
1607 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1608 if (!utf16_path)
1609 return -ENOMEM;
1610
1611 oparms.tcon = tcon;
1612 oparms.desired_access = access_flags;
1613 oparms.disposition = FILE_OPEN;
1614 oparms.path = path;
1615 oparms.fid = &fid;
1616 oparms.reconnect = false;
1617
1618 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1619 kfree(utf16_path);
1620 if (!rc) {
1621 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1622 fid.volatile_fid, pnntsd, acllen, aclflag);
1623 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1624 }
1625
1626 cifs_put_tlink(tlink);
1627 free_xid(xid);
1628 return rc;
1629 }
1630 #endif /* CIFS_ACL */
1631
1632 /* Retrieve an ACL from the server */
1633 static struct cifs_ntsd *
1634 get_smb2_acl(struct cifs_sb_info *cifs_sb,
1635 struct inode *inode, const char *path,
1636 u32 *pacllen)
1637 {
1638 struct cifs_ntsd *pntsd = NULL;
1639 struct cifsFileInfo *open_file = NULL;
1640
1641 if (inode)
1642 open_file = find_readable_file(CIFS_I(inode), true);
1643 if (!open_file)
1644 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
1645
1646 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
1647 cifsFileInfo_put(open_file);
1648 return pntsd;
1649 }
1650 #endif
1651
1652 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1653 loff_t offset, loff_t len, bool keep_size)
1654 {
1655 struct inode *inode;
1656 struct cifsInodeInfo *cifsi;
1657 struct cifsFileInfo *cfile = file->private_data;
1658 struct file_zero_data_information fsctl_buf;
1659 long rc;
1660 unsigned int xid;
1661
1662 xid = get_xid();
1663
1664 inode = d_inode(cfile->dentry);
1665 cifsi = CIFS_I(inode);
1666
1667 /* if file not oplocked can't be sure whether asking to extend size */
1668 if (!CIFS_CACHE_READ(cifsi))
1669 if (keep_size == false)
1670 return -EOPNOTSUPP;
1671
1672 /*
1673 * Must check if file sparse since fallocate -z (zero range) assumes
1674 * non-sparse allocation
1675 */
1676 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1677 return -EOPNOTSUPP;
1678
1679 /*
1680 * need to make sure we are not asked to extend the file since the SMB3
1681 * fsctl does not change the file size. In the future we could change
1682 * this to zero the first part of the range then set the file size
1683 * which for a non sparse file would zero the newly extended range
1684 */
1685 if (keep_size == false)
1686 if (i_size_read(inode) < offset + len)
1687 return -EOPNOTSUPP;
1688
1689 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1690
1691 fsctl_buf.FileOffset = cpu_to_le64(offset);
1692 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1693
1694 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1695 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1696 true /* is_fctl */, false /* use_ipc */,
1697 (char *)&fsctl_buf,
1698 sizeof(struct file_zero_data_information), NULL, NULL);
1699 free_xid(xid);
1700 return rc;
1701 }
1702
1703 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1704 loff_t offset, loff_t len)
1705 {
1706 struct inode *inode;
1707 struct cifsInodeInfo *cifsi;
1708 struct cifsFileInfo *cfile = file->private_data;
1709 struct file_zero_data_information fsctl_buf;
1710 long rc;
1711 unsigned int xid;
1712 __u8 set_sparse = 1;
1713
1714 xid = get_xid();
1715
1716 inode = d_inode(cfile->dentry);
1717 cifsi = CIFS_I(inode);
1718
1719 /* Need to make file sparse, if not already, before freeing range. */
1720 /* Consider adding equivalent for compressed since it could also work */
1721 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1722 return -EOPNOTSUPP;
1723
1724 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1725
1726 fsctl_buf.FileOffset = cpu_to_le64(offset);
1727 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1728
1729 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1730 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1731 true /* is_fctl */, false /* use_ipc */,
1732 (char *)&fsctl_buf,
1733 sizeof(struct file_zero_data_information), NULL, NULL);
1734 free_xid(xid);
1735 return rc;
1736 }
1737
1738 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1739 loff_t off, loff_t len, bool keep_size)
1740 {
1741 struct inode *inode;
1742 struct cifsInodeInfo *cifsi;
1743 struct cifsFileInfo *cfile = file->private_data;
1744 long rc = -EOPNOTSUPP;
1745 unsigned int xid;
1746
1747 xid = get_xid();
1748
1749 inode = d_inode(cfile->dentry);
1750 cifsi = CIFS_I(inode);
1751
1752 /* if file not oplocked can't be sure whether asking to extend size */
1753 if (!CIFS_CACHE_READ(cifsi))
1754 if (keep_size == false)
1755 return -EOPNOTSUPP;
1756
1757 /*
1758 * Files are non-sparse by default so falloc may be a no-op
1759 * Must check if file sparse. If not sparse, and not extending
1760 * then no need to do anything since file already allocated
1761 */
1762 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1763 if (keep_size == true)
1764 return 0;
1765 /* check if extending file */
1766 else if (i_size_read(inode) >= off + len)
1767 /* not extending file and already not sparse */
1768 return 0;
1769 /* BB: in future add else clause to extend file */
1770 else
1771 return -EOPNOTSUPP;
1772 }
1773
1774 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1775 /*
1776 * Check if falloc starts within first few pages of file
1777 * and ends within a few pages of the end of file to
1778 * ensure that most of file is being forced to be
1779 * fallocated now. If so then setting whole file sparse
1780 * ie potentially making a few extra pages at the beginning
1781 * or end of the file non-sparse via set_sparse is harmless.
1782 */
1783 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1784 return -EOPNOTSUPP;
1785
1786 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1787 }
1788 /* BB: else ... in future add code to extend file and set sparse */
1789
1790
1791 free_xid(xid);
1792 return rc;
1793 }
1794
1795
1796 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1797 loff_t off, loff_t len)
1798 {
1799 /* KEEP_SIZE already checked for by do_fallocate */
1800 if (mode & FALLOC_FL_PUNCH_HOLE)
1801 return smb3_punch_hole(file, tcon, off, len);
1802 else if (mode & FALLOC_FL_ZERO_RANGE) {
1803 if (mode & FALLOC_FL_KEEP_SIZE)
1804 return smb3_zero_range(file, tcon, off, len, true);
1805 return smb3_zero_range(file, tcon, off, len, false);
1806 } else if (mode == FALLOC_FL_KEEP_SIZE)
1807 return smb3_simple_falloc(file, tcon, off, len, true);
1808 else if (mode == 0)
1809 return smb3_simple_falloc(file, tcon, off, len, false);
1810
1811 return -EOPNOTSUPP;
1812 }
1813
1814 static void
1815 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1816 struct cifsInodeInfo *cinode, bool set_level2)
1817 {
1818 if (set_level2)
1819 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1820 0, NULL);
1821 else
1822 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1823 }
1824
1825 static void
1826 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1827 unsigned int epoch, bool *purge_cache)
1828 {
1829 oplock &= 0xFF;
1830 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1831 return;
1832 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1833 cinode->oplock = CIFS_CACHE_RHW_FLG;
1834 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1835 &cinode->vfs_inode);
1836 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1837 cinode->oplock = CIFS_CACHE_RW_FLG;
1838 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1839 &cinode->vfs_inode);
1840 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1841 cinode->oplock = CIFS_CACHE_READ_FLG;
1842 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1843 &cinode->vfs_inode);
1844 } else
1845 cinode->oplock = 0;
1846 }
1847
1848 static void
1849 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1850 unsigned int epoch, bool *purge_cache)
1851 {
1852 char message[5] = {0};
1853
1854 oplock &= 0xFF;
1855 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1856 return;
1857
1858 cinode->oplock = 0;
1859 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1860 cinode->oplock |= CIFS_CACHE_READ_FLG;
1861 strcat(message, "R");
1862 }
1863 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1864 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1865 strcat(message, "H");
1866 }
1867 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1868 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1869 strcat(message, "W");
1870 }
1871 if (!cinode->oplock)
1872 strcat(message, "None");
1873 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1874 &cinode->vfs_inode);
1875 }
1876
1877 static void
1878 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1879 unsigned int epoch, bool *purge_cache)
1880 {
1881 unsigned int old_oplock = cinode->oplock;
1882
1883 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1884
1885 if (purge_cache) {
1886 *purge_cache = false;
1887 if (old_oplock == CIFS_CACHE_READ_FLG) {
1888 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1889 (epoch - cinode->epoch > 0))
1890 *purge_cache = true;
1891 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1892 (epoch - cinode->epoch > 1))
1893 *purge_cache = true;
1894 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1895 (epoch - cinode->epoch > 1))
1896 *purge_cache = true;
1897 else if (cinode->oplock == 0 &&
1898 (epoch - cinode->epoch > 0))
1899 *purge_cache = true;
1900 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1901 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1902 (epoch - cinode->epoch > 0))
1903 *purge_cache = true;
1904 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1905 (epoch - cinode->epoch > 1))
1906 *purge_cache = true;
1907 }
1908 cinode->epoch = epoch;
1909 }
1910 }
1911
1912 static bool
1913 smb2_is_read_op(__u32 oplock)
1914 {
1915 return oplock == SMB2_OPLOCK_LEVEL_II;
1916 }
1917
1918 static bool
1919 smb21_is_read_op(__u32 oplock)
1920 {
1921 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1922 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1923 }
1924
1925 static __le32
1926 map_oplock_to_lease(u8 oplock)
1927 {
1928 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1929 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1930 else if (oplock == SMB2_OPLOCK_LEVEL_II)
1931 return SMB2_LEASE_READ_CACHING;
1932 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1933 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1934 SMB2_LEASE_WRITE_CACHING;
1935 return 0;
1936 }
1937
1938 static char *
1939 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1940 {
1941 struct create_lease *buf;
1942
1943 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1944 if (!buf)
1945 return NULL;
1946
1947 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1948 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1949 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1950
1951 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1952 (struct create_lease, lcontext));
1953 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1954 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1955 (struct create_lease, Name));
1956 buf->ccontext.NameLength = cpu_to_le16(4);
1957 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1958 buf->Name[0] = 'R';
1959 buf->Name[1] = 'q';
1960 buf->Name[2] = 'L';
1961 buf->Name[3] = 's';
1962 return (char *)buf;
1963 }
1964
1965 static char *
1966 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1967 {
1968 struct create_lease_v2 *buf;
1969
1970 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1971 if (!buf)
1972 return NULL;
1973
1974 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1975 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1976 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1977
1978 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1979 (struct create_lease_v2, lcontext));
1980 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1981 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1982 (struct create_lease_v2, Name));
1983 buf->ccontext.NameLength = cpu_to_le16(4);
1984 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1985 buf->Name[0] = 'R';
1986 buf->Name[1] = 'q';
1987 buf->Name[2] = 'L';
1988 buf->Name[3] = 's';
1989 return (char *)buf;
1990 }
1991
1992 static __u8
1993 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1994 {
1995 struct create_lease *lc = (struct create_lease *)buf;
1996
1997 *epoch = 0; /* not used */
1998 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1999 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2000 return le32_to_cpu(lc->lcontext.LeaseState);
2001 }
2002
2003 static __u8
2004 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
2005 {
2006 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
2007
2008 *epoch = le16_to_cpu(lc->lcontext.Epoch);
2009 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2010 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2011 return le32_to_cpu(lc->lcontext.LeaseState);
2012 }
2013
2014 static unsigned int
2015 smb2_wp_retry_size(struct inode *inode)
2016 {
2017 return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
2018 SMB2_MAX_BUFFER_SIZE);
2019 }
2020
2021 static bool
2022 smb2_dir_needs_close(struct cifsFileInfo *cfile)
2023 {
2024 return !cfile->invalidHandle;
2025 }
2026
2027 static void
2028 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, struct smb_rqst *old_rq)
2029 {
2030 struct smb2_sync_hdr *shdr =
2031 (struct smb2_sync_hdr *)old_rq->rq_iov[1].iov_base;
2032 unsigned int orig_len = get_rfc1002_length(old_rq->rq_iov[0].iov_base);
2033
2034 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
2035 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
2036 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
2037 tr_hdr->Flags = cpu_to_le16(0x01);
2038 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2039 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
2040 inc_rfc1001_len(tr_hdr, sizeof(struct smb2_transform_hdr) - 4);
2041 inc_rfc1001_len(tr_hdr, orig_len);
2042 }
2043
2044 static struct scatterlist *
2045 init_sg(struct smb_rqst *rqst, u8 *sign)
2046 {
2047 unsigned int sg_len = rqst->rq_nvec + rqst->rq_npages + 1;
2048 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 24;
2049 struct scatterlist *sg;
2050 unsigned int i;
2051 unsigned int j;
2052
2053 sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
2054 if (!sg)
2055 return NULL;
2056
2057 sg_init_table(sg, sg_len);
2058 sg_set_buf(&sg[0], rqst->rq_iov[0].iov_base + 24, assoc_data_len);
2059 for (i = 1; i < rqst->rq_nvec; i++)
2060 sg_set_buf(&sg[i], rqst->rq_iov[i].iov_base,
2061 rqst->rq_iov[i].iov_len);
2062 for (j = 0; i < sg_len - 1; i++, j++) {
2063 unsigned int len = (j < rqst->rq_npages - 1) ? rqst->rq_pagesz
2064 : rqst->rq_tailsz;
2065 sg_set_page(&sg[i], rqst->rq_pages[j], len, 0);
2066 }
2067 sg_set_buf(&sg[sg_len - 1], sign, SMB2_SIGNATURE_SIZE);
2068 return sg;
2069 }
2070
2071 struct cifs_crypt_result {
2072 int err;
2073 struct completion completion;
2074 };
2075
2076 static void cifs_crypt_complete(struct crypto_async_request *req, int err)
2077 {
2078 struct cifs_crypt_result *res = req->data;
2079
2080 if (err == -EINPROGRESS)
2081 return;
2082
2083 res->err = err;
2084 complete(&res->completion);
2085 }
2086
2087 static int
2088 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
2089 {
2090 struct cifs_ses *ses;
2091 u8 *ses_enc_key;
2092
2093 spin_lock(&cifs_tcp_ses_lock);
2094 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2095 if (ses->Suid != ses_id)
2096 continue;
2097 ses_enc_key = enc ? ses->smb3encryptionkey :
2098 ses->smb3decryptionkey;
2099 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
2100 spin_unlock(&cifs_tcp_ses_lock);
2101 return 0;
2102 }
2103 spin_unlock(&cifs_tcp_ses_lock);
2104
2105 return 1;
2106 }
2107 /*
2108 * Encrypt or decrypt @rqst message. @rqst has the following format:
2109 * iov[0] - transform header (associate data),
2110 * iov[1-N] and pages - data to encrypt.
2111 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
2112 * untouched.
2113 */
2114 static int
2115 crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
2116 {
2117 struct smb2_transform_hdr *tr_hdr =
2118 (struct smb2_transform_hdr *)rqst->rq_iov[0].iov_base;
2119 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 24;
2120 int rc = 0;
2121 struct scatterlist *sg;
2122 u8 sign[SMB2_SIGNATURE_SIZE] = {};
2123 u8 key[SMB3_SIGN_KEY_SIZE];
2124 struct aead_request *req;
2125 char *iv;
2126 unsigned int iv_len;
2127 struct cifs_crypt_result result = {0, };
2128 struct crypto_aead *tfm;
2129 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2130
2131 init_completion(&result.completion);
2132
2133 rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
2134 if (rc) {
2135 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
2136 enc ? "en" : "de");
2137 return 0;
2138 }
2139
2140 rc = smb3_crypto_aead_allocate(server);
2141 if (rc) {
2142 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
2143 return rc;
2144 }
2145
2146 tfm = enc ? server->secmech.ccmaesencrypt :
2147 server->secmech.ccmaesdecrypt;
2148 rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
2149 if (rc) {
2150 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
2151 return rc;
2152 }
2153
2154 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
2155 if (rc) {
2156 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
2157 return rc;
2158 }
2159
2160 req = aead_request_alloc(tfm, GFP_KERNEL);
2161 if (!req) {
2162 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
2163 return -ENOMEM;
2164 }
2165
2166 if (!enc) {
2167 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
2168 crypt_len += SMB2_SIGNATURE_SIZE;
2169 }
2170
2171 sg = init_sg(rqst, sign);
2172 if (!sg) {
2173 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
2174 rc = -ENOMEM;
2175 goto free_req;
2176 }
2177
2178 iv_len = crypto_aead_ivsize(tfm);
2179 iv = kzalloc(iv_len, GFP_KERNEL);
2180 if (!iv) {
2181 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
2182 rc = -ENOMEM;
2183 goto free_sg;
2184 }
2185 iv[0] = 3;
2186 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2187
2188 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
2189 aead_request_set_ad(req, assoc_data_len);
2190
2191 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
2192 cifs_crypt_complete, &result);
2193
2194 rc = enc ? crypto_aead_encrypt(req) : crypto_aead_decrypt(req);
2195
2196 if (rc == -EINPROGRESS || rc == -EBUSY) {
2197 wait_for_completion(&result.completion);
2198 rc = result.err;
2199 }
2200
2201 if (!rc && enc)
2202 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
2203
2204 kfree(iv);
2205 free_sg:
2206 kfree(sg);
2207 free_req:
2208 kfree(req);
2209 return rc;
2210 }
2211
2212 static int
2213 smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
2214 struct smb_rqst *old_rq)
2215 {
2216 struct kvec *iov;
2217 struct page **pages;
2218 struct smb2_transform_hdr *tr_hdr;
2219 unsigned int npages = old_rq->rq_npages;
2220 int i;
2221 int rc = -ENOMEM;
2222
2223 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2224 if (!pages)
2225 return rc;
2226
2227 new_rq->rq_pages = pages;
2228 new_rq->rq_npages = old_rq->rq_npages;
2229 new_rq->rq_pagesz = old_rq->rq_pagesz;
2230 new_rq->rq_tailsz = old_rq->rq_tailsz;
2231
2232 for (i = 0; i < npages; i++) {
2233 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2234 if (!pages[i])
2235 goto err_free_pages;
2236 }
2237
2238 iov = kmalloc_array(old_rq->rq_nvec, sizeof(struct kvec), GFP_KERNEL);
2239 if (!iov)
2240 goto err_free_pages;
2241
2242 /* copy all iovs from the old except the 1st one (rfc1002 length) */
2243 memcpy(&iov[1], &old_rq->rq_iov[1],
2244 sizeof(struct kvec) * (old_rq->rq_nvec - 1));
2245 new_rq->rq_iov = iov;
2246 new_rq->rq_nvec = old_rq->rq_nvec;
2247
2248 tr_hdr = kmalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
2249 if (!tr_hdr)
2250 goto err_free_iov;
2251
2252 /* fill the 1st iov with a transform header */
2253 fill_transform_hdr(tr_hdr, old_rq);
2254 new_rq->rq_iov[0].iov_base = tr_hdr;
2255 new_rq->rq_iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2256
2257 /* copy pages form the old */
2258 for (i = 0; i < npages; i++) {
2259 char *dst = kmap(new_rq->rq_pages[i]);
2260 char *src = kmap(old_rq->rq_pages[i]);
2261 unsigned int len = (i < npages - 1) ? new_rq->rq_pagesz :
2262 new_rq->rq_tailsz;
2263 memcpy(dst, src, len);
2264 kunmap(new_rq->rq_pages[i]);
2265 kunmap(old_rq->rq_pages[i]);
2266 }
2267
2268 rc = crypt_message(server, new_rq, 1);
2269 cifs_dbg(FYI, "encrypt message returned %d", rc);
2270 if (rc)
2271 goto err_free_tr_hdr;
2272
2273 return rc;
2274
2275 err_free_tr_hdr:
2276 kfree(tr_hdr);
2277 err_free_iov:
2278 kfree(iov);
2279 err_free_pages:
2280 for (i = i - 1; i >= 0; i--)
2281 put_page(pages[i]);
2282 kfree(pages);
2283 return rc;
2284 }
2285
2286 static void
2287 smb3_free_transform_rq(struct smb_rqst *rqst)
2288 {
2289 int i = rqst->rq_npages - 1;
2290
2291 for (; i >= 0; i--)
2292 put_page(rqst->rq_pages[i]);
2293 kfree(rqst->rq_pages);
2294 /* free transform header */
2295 kfree(rqst->rq_iov[0].iov_base);
2296 kfree(rqst->rq_iov);
2297 }
2298
2299 static int
2300 smb3_is_transform_hdr(void *buf)
2301 {
2302 struct smb2_transform_hdr *trhdr = buf;
2303
2304 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
2305 }
2306
2307 static int
2308 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
2309 unsigned int buf_data_size, struct page **pages,
2310 unsigned int npages, unsigned int page_data_size)
2311 {
2312 struct kvec iov[2];
2313 struct smb_rqst rqst = {NULL};
2314 struct smb2_hdr *hdr;
2315 int rc;
2316
2317 iov[0].iov_base = buf;
2318 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2319 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
2320 iov[1].iov_len = buf_data_size;
2321
2322 rqst.rq_iov = iov;
2323 rqst.rq_nvec = 2;
2324 rqst.rq_pages = pages;
2325 rqst.rq_npages = npages;
2326 rqst.rq_pagesz = PAGE_SIZE;
2327 rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
2328
2329 rc = crypt_message(server, &rqst, 0);
2330 cifs_dbg(FYI, "decrypt message returned %d\n", rc);
2331
2332 if (rc)
2333 return rc;
2334
2335 memmove(buf + 4, iov[1].iov_base, buf_data_size);
2336 hdr = (struct smb2_hdr *)buf;
2337 hdr->smb2_buf_length = cpu_to_be32(buf_data_size + page_data_size);
2338 server->total_read = buf_data_size + page_data_size + 4;
2339
2340 return rc;
2341 }
2342
2343 static int
2344 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
2345 unsigned int npages, unsigned int len)
2346 {
2347 int i;
2348 int length;
2349
2350 for (i = 0; i < npages; i++) {
2351 struct page *page = pages[i];
2352 size_t n;
2353
2354 n = len;
2355 if (len >= PAGE_SIZE) {
2356 /* enough data to fill the page */
2357 n = PAGE_SIZE;
2358 len -= n;
2359 } else {
2360 zero_user(page, len, PAGE_SIZE - len);
2361 len = 0;
2362 }
2363 length = cifs_read_page_from_socket(server, page, n);
2364 if (length < 0)
2365 return length;
2366 server->total_read += length;
2367 }
2368
2369 return 0;
2370 }
2371
2372 static int
2373 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
2374 unsigned int cur_off, struct bio_vec **page_vec)
2375 {
2376 struct bio_vec *bvec;
2377 int i;
2378
2379 bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
2380 if (!bvec)
2381 return -ENOMEM;
2382
2383 for (i = 0; i < npages; i++) {
2384 bvec[i].bv_page = pages[i];
2385 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
2386 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
2387 data_size -= bvec[i].bv_len;
2388 }
2389
2390 if (data_size != 0) {
2391 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
2392 kfree(bvec);
2393 return -EIO;
2394 }
2395
2396 *page_vec = bvec;
2397 return 0;
2398 }
2399
2400 static int
2401 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
2402 char *buf, unsigned int buf_len, struct page **pages,
2403 unsigned int npages, unsigned int page_data_size)
2404 {
2405 unsigned int data_offset;
2406 unsigned int data_len;
2407 unsigned int cur_off;
2408 unsigned int cur_page_idx;
2409 unsigned int pad_len;
2410 struct cifs_readdata *rdata = mid->callback_data;
2411 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
2412 struct bio_vec *bvec = NULL;
2413 struct iov_iter iter;
2414 struct kvec iov;
2415 int length;
2416
2417 if (shdr->Command != SMB2_READ) {
2418 cifs_dbg(VFS, "only big read responses are supported\n");
2419 return -ENOTSUPP;
2420 }
2421
2422 if (server->ops->is_session_expired &&
2423 server->ops->is_session_expired(buf)) {
2424 cifs_reconnect(server);
2425 wake_up(&server->response_q);
2426 return -1;
2427 }
2428
2429 if (server->ops->is_status_pending &&
2430 server->ops->is_status_pending(buf, server, 0))
2431 return -1;
2432
2433 rdata->result = server->ops->map_error(buf, false);
2434 if (rdata->result != 0) {
2435 cifs_dbg(FYI, "%s: server returned error %d\n",
2436 __func__, rdata->result);
2437 dequeue_mid(mid, rdata->result);
2438 return 0;
2439 }
2440
2441 data_offset = server->ops->read_data_offset(buf) + 4;
2442 data_len = server->ops->read_data_length(buf);
2443
2444 if (data_offset < server->vals->read_rsp_size) {
2445 /*
2446 * win2k8 sometimes sends an offset of 0 when the read
2447 * is beyond the EOF. Treat it as if the data starts just after
2448 * the header.
2449 */
2450 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
2451 __func__, data_offset);
2452 data_offset = server->vals->read_rsp_size;
2453 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
2454 /* data_offset is beyond the end of smallbuf */
2455 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
2456 __func__, data_offset);
2457 rdata->result = -EIO;
2458 dequeue_mid(mid, rdata->result);
2459 return 0;
2460 }
2461
2462 pad_len = data_offset - server->vals->read_rsp_size;
2463
2464 if (buf_len <= data_offset) {
2465 /* read response payload is in pages */
2466 cur_page_idx = pad_len / PAGE_SIZE;
2467 cur_off = pad_len % PAGE_SIZE;
2468
2469 if (cur_page_idx != 0) {
2470 /* data offset is beyond the 1st page of response */
2471 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
2472 __func__, data_offset);
2473 rdata->result = -EIO;
2474 dequeue_mid(mid, rdata->result);
2475 return 0;
2476 }
2477
2478 if (data_len > page_data_size - pad_len) {
2479 /* data_len is corrupt -- discard frame */
2480 rdata->result = -EIO;
2481 dequeue_mid(mid, rdata->result);
2482 return 0;
2483 }
2484
2485 rdata->result = init_read_bvec(pages, npages, page_data_size,
2486 cur_off, &bvec);
2487 if (rdata->result != 0) {
2488 dequeue_mid(mid, rdata->result);
2489 return 0;
2490 }
2491
2492 iov_iter_bvec(&iter, WRITE | ITER_BVEC, bvec, npages, data_len);
2493 } else if (buf_len >= data_offset + data_len) {
2494 /* read response payload is in buf */
2495 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
2496 iov.iov_base = buf + data_offset;
2497 iov.iov_len = data_len;
2498 iov_iter_kvec(&iter, WRITE | ITER_KVEC, &iov, 1, data_len);
2499 } else {
2500 /* read response payload cannot be in both buf and pages */
2501 WARN_ONCE(1, "buf can not contain only a part of read data");
2502 rdata->result = -EIO;
2503 dequeue_mid(mid, rdata->result);
2504 return 0;
2505 }
2506
2507 /* set up first iov for signature check */
2508 rdata->iov[0].iov_base = buf;
2509 rdata->iov[0].iov_len = 4;
2510 rdata->iov[1].iov_base = buf + 4;
2511 rdata->iov[1].iov_len = server->vals->read_rsp_size - 4;
2512 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
2513 rdata->iov[0].iov_base, server->vals->read_rsp_size);
2514
2515 length = rdata->copy_into_pages(server, rdata, &iter);
2516
2517 kfree(bvec);
2518
2519 if (length < 0)
2520 return length;
2521
2522 dequeue_mid(mid, false);
2523 return length;
2524 }
2525
2526 static int
2527 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2528 {
2529 char *buf = server->smallbuf;
2530 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2531 unsigned int npages;
2532 struct page **pages;
2533 unsigned int len;
2534 unsigned int buflen = get_rfc1002_length(buf) + 4;
2535 int rc;
2536 int i = 0;
2537
2538 len = min_t(unsigned int, buflen, server->vals->read_rsp_size - 4 +
2539 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
2540
2541 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
2542 if (rc < 0)
2543 return rc;
2544 server->total_read += rc;
2545
2546 len = le32_to_cpu(tr_hdr->OriginalMessageSize) + 4 -
2547 server->vals->read_rsp_size;
2548 npages = DIV_ROUND_UP(len, PAGE_SIZE);
2549
2550 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2551 if (!pages) {
2552 rc = -ENOMEM;
2553 goto discard_data;
2554 }
2555
2556 for (; i < npages; i++) {
2557 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2558 if (!pages[i]) {
2559 rc = -ENOMEM;
2560 goto discard_data;
2561 }
2562 }
2563
2564 /* read read data into pages */
2565 rc = read_data_into_pages(server, pages, npages, len);
2566 if (rc)
2567 goto free_pages;
2568
2569 rc = cifs_discard_remaining_data(server);
2570 if (rc)
2571 goto free_pages;
2572
2573 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size - 4,
2574 pages, npages, len);
2575 if (rc)
2576 goto free_pages;
2577
2578 *mid = smb2_find_mid(server, buf);
2579 if (*mid == NULL)
2580 cifs_dbg(FYI, "mid not found\n");
2581 else {
2582 cifs_dbg(FYI, "mid found\n");
2583 (*mid)->decrypted = true;
2584 rc = handle_read_data(server, *mid, buf,
2585 server->vals->read_rsp_size,
2586 pages, npages, len);
2587 }
2588
2589 free_pages:
2590 for (i = i - 1; i >= 0; i--)
2591 put_page(pages[i]);
2592 kfree(pages);
2593 return rc;
2594 discard_data:
2595 cifs_discard_remaining_data(server);
2596 goto free_pages;
2597 }
2598
2599 static int
2600 receive_encrypted_standard(struct TCP_Server_Info *server,
2601 struct mid_q_entry **mid)
2602 {
2603 int length;
2604 char *buf = server->smallbuf;
2605 unsigned int pdu_length = get_rfc1002_length(buf);
2606 unsigned int buf_size;
2607 struct mid_q_entry *mid_entry;
2608
2609 /* switch to large buffer if too big for a small one */
2610 if (pdu_length + 4 > MAX_CIFS_SMALL_BUFFER_SIZE) {
2611 server->large_buf = true;
2612 memcpy(server->bigbuf, buf, server->total_read);
2613 buf = server->bigbuf;
2614 }
2615
2616 /* now read the rest */
2617 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
2618 pdu_length - HEADER_SIZE(server) + 1 + 4);
2619 if (length < 0)
2620 return length;
2621 server->total_read += length;
2622
2623 buf_size = pdu_length + 4 - sizeof(struct smb2_transform_hdr);
2624 length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
2625 if (length)
2626 return length;
2627
2628 mid_entry = smb2_find_mid(server, buf);
2629 if (mid_entry == NULL)
2630 cifs_dbg(FYI, "mid not found\n");
2631 else {
2632 cifs_dbg(FYI, "mid found\n");
2633 mid_entry->decrypted = true;
2634 }
2635
2636 *mid = mid_entry;
2637
2638 if (mid_entry && mid_entry->handle)
2639 return mid_entry->handle(server, mid_entry);
2640
2641 return cifs_handle_standard(server, mid_entry);
2642 }
2643
2644 static int
2645 smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2646 {
2647 char *buf = server->smallbuf;
2648 unsigned int pdu_length = get_rfc1002_length(buf);
2649 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2650 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2651
2652 if (pdu_length + 4 < sizeof(struct smb2_transform_hdr) +
2653 sizeof(struct smb2_sync_hdr)) {
2654 cifs_dbg(VFS, "Transform message is too small (%u)\n",
2655 pdu_length);
2656 cifs_reconnect(server);
2657 wake_up(&server->response_q);
2658 return -ECONNABORTED;
2659 }
2660
2661 if (pdu_length + 4 < orig_len + sizeof(struct smb2_transform_hdr)) {
2662 cifs_dbg(VFS, "Transform message is broken\n");
2663 cifs_reconnect(server);
2664 wake_up(&server->response_q);
2665 return -ECONNABORTED;
2666 }
2667
2668 if (pdu_length + 4 > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
2669 return receive_encrypted_read(server, mid);
2670
2671 return receive_encrypted_standard(server, mid);
2672 }
2673
2674 int
2675 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
2676 {
2677 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
2678
2679 return handle_read_data(server, mid, buf, get_rfc1002_length(buf) + 4,
2680 NULL, 0, 0);
2681 }
2682
2683 struct smb_version_operations smb20_operations = {
2684 .compare_fids = smb2_compare_fids,
2685 .setup_request = smb2_setup_request,
2686 .setup_async_request = smb2_setup_async_request,
2687 .check_receive = smb2_check_receive,
2688 .add_credits = smb2_add_credits,
2689 .set_credits = smb2_set_credits,
2690 .get_credits_field = smb2_get_credits_field,
2691 .get_credits = smb2_get_credits,
2692 .wait_mtu_credits = cifs_wait_mtu_credits,
2693 .get_next_mid = smb2_get_next_mid,
2694 .read_data_offset = smb2_read_data_offset,
2695 .read_data_length = smb2_read_data_length,
2696 .map_error = map_smb2_to_linux_error,
2697 .find_mid = smb2_find_mid,
2698 .check_message = smb2_check_message,
2699 .dump_detail = smb2_dump_detail,
2700 .clear_stats = smb2_clear_stats,
2701 .print_stats = smb2_print_stats,
2702 .is_oplock_break = smb2_is_valid_oplock_break,
2703 .handle_cancelled_mid = smb2_handle_cancelled_mid,
2704 .downgrade_oplock = smb2_downgrade_oplock,
2705 .need_neg = smb2_need_neg,
2706 .negotiate = smb2_negotiate,
2707 .negotiate_wsize = smb2_negotiate_wsize,
2708 .negotiate_rsize = smb2_negotiate_rsize,
2709 .sess_setup = SMB2_sess_setup,
2710 .logoff = SMB2_logoff,
2711 .tree_connect = SMB2_tcon,
2712 .tree_disconnect = SMB2_tdis,
2713 .qfs_tcon = smb2_qfs_tcon,
2714 .is_path_accessible = smb2_is_path_accessible,
2715 .can_echo = smb2_can_echo,
2716 .echo = SMB2_echo,
2717 .query_path_info = smb2_query_path_info,
2718 .get_srv_inum = smb2_get_srv_inum,
2719 .query_file_info = smb2_query_file_info,
2720 .set_path_size = smb2_set_path_size,
2721 .set_file_size = smb2_set_file_size,
2722 .set_file_info = smb2_set_file_info,
2723 .set_compression = smb2_set_compression,
2724 .mkdir = smb2_mkdir,
2725 .mkdir_setinfo = smb2_mkdir_setinfo,
2726 .rmdir = smb2_rmdir,
2727 .unlink = smb2_unlink,
2728 .rename = smb2_rename_path,
2729 .create_hardlink = smb2_create_hardlink,
2730 .query_symlink = smb2_query_symlink,
2731 .query_mf_symlink = smb3_query_mf_symlink,
2732 .create_mf_symlink = smb3_create_mf_symlink,
2733 .open = smb2_open_file,
2734 .set_fid = smb2_set_fid,
2735 .close = smb2_close_file,
2736 .flush = smb2_flush_file,
2737 .async_readv = smb2_async_readv,
2738 .async_writev = smb2_async_writev,
2739 .sync_read = smb2_sync_read,
2740 .sync_write = smb2_sync_write,
2741 .query_dir_first = smb2_query_dir_first,
2742 .query_dir_next = smb2_query_dir_next,
2743 .close_dir = smb2_close_dir,
2744 .calc_smb_size = smb2_calc_size,
2745 .is_status_pending = smb2_is_status_pending,
2746 .is_session_expired = smb2_is_session_expired,
2747 .oplock_response = smb2_oplock_response,
2748 .queryfs = smb2_queryfs,
2749 .mand_lock = smb2_mand_lock,
2750 .mand_unlock_range = smb2_unlock_range,
2751 .push_mand_locks = smb2_push_mandatory_locks,
2752 .get_lease_key = smb2_get_lease_key,
2753 .set_lease_key = smb2_set_lease_key,
2754 .new_lease_key = smb2_new_lease_key,
2755 .calc_signature = smb2_calc_signature,
2756 .is_read_op = smb2_is_read_op,
2757 .set_oplock_level = smb2_set_oplock_level,
2758 .create_lease_buf = smb2_create_lease_buf,
2759 .parse_lease_buf = smb2_parse_lease_buf,
2760 .copychunk_range = smb2_copychunk_range,
2761 .wp_retry_size = smb2_wp_retry_size,
2762 .dir_needs_close = smb2_dir_needs_close,
2763 .get_dfs_refer = smb2_get_dfs_refer,
2764 .select_sectype = smb2_select_sectype,
2765 #ifdef CONFIG_CIFS_XATTR
2766 .query_all_EAs = smb2_query_eas,
2767 .set_EA = smb2_set_ea,
2768 #endif /* CIFS_XATTR */
2769 #ifdef CONFIG_CIFS_ACL
2770 .get_acl = get_smb2_acl,
2771 .get_acl_by_fid = get_smb2_acl_by_fid,
2772 .set_acl = set_smb2_acl,
2773 #endif /* CIFS_ACL */
2774 };
2775
2776 struct smb_version_operations smb21_operations = {
2777 .compare_fids = smb2_compare_fids,
2778 .setup_request = smb2_setup_request,
2779 .setup_async_request = smb2_setup_async_request,
2780 .check_receive = smb2_check_receive,
2781 .add_credits = smb2_add_credits,
2782 .set_credits = smb2_set_credits,
2783 .get_credits_field = smb2_get_credits_field,
2784 .get_credits = smb2_get_credits,
2785 .wait_mtu_credits = smb2_wait_mtu_credits,
2786 .get_next_mid = smb2_get_next_mid,
2787 .read_data_offset = smb2_read_data_offset,
2788 .read_data_length = smb2_read_data_length,
2789 .map_error = map_smb2_to_linux_error,
2790 .find_mid = smb2_find_mid,
2791 .check_message = smb2_check_message,
2792 .dump_detail = smb2_dump_detail,
2793 .clear_stats = smb2_clear_stats,
2794 .print_stats = smb2_print_stats,
2795 .is_oplock_break = smb2_is_valid_oplock_break,
2796 .handle_cancelled_mid = smb2_handle_cancelled_mid,
2797 .downgrade_oplock = smb2_downgrade_oplock,
2798 .need_neg = smb2_need_neg,
2799 .negotiate = smb2_negotiate,
2800 .negotiate_wsize = smb2_negotiate_wsize,
2801 .negotiate_rsize = smb2_negotiate_rsize,
2802 .sess_setup = SMB2_sess_setup,
2803 .logoff = SMB2_logoff,
2804 .tree_connect = SMB2_tcon,
2805 .tree_disconnect = SMB2_tdis,
2806 .qfs_tcon = smb2_qfs_tcon,
2807 .is_path_accessible = smb2_is_path_accessible,
2808 .can_echo = smb2_can_echo,
2809 .echo = SMB2_echo,
2810 .query_path_info = smb2_query_path_info,
2811 .get_srv_inum = smb2_get_srv_inum,
2812 .query_file_info = smb2_query_file_info,
2813 .set_path_size = smb2_set_path_size,
2814 .set_file_size = smb2_set_file_size,
2815 .set_file_info = smb2_set_file_info,
2816 .set_compression = smb2_set_compression,
2817 .mkdir = smb2_mkdir,
2818 .mkdir_setinfo = smb2_mkdir_setinfo,
2819 .rmdir = smb2_rmdir,
2820 .unlink = smb2_unlink,
2821 .rename = smb2_rename_path,
2822 .create_hardlink = smb2_create_hardlink,
2823 .query_symlink = smb2_query_symlink,
2824 .query_mf_symlink = smb3_query_mf_symlink,
2825 .create_mf_symlink = smb3_create_mf_symlink,
2826 .open = smb2_open_file,
2827 .set_fid = smb2_set_fid,
2828 .close = smb2_close_file,
2829 .flush = smb2_flush_file,
2830 .async_readv = smb2_async_readv,
2831 .async_writev = smb2_async_writev,
2832 .sync_read = smb2_sync_read,
2833 .sync_write = smb2_sync_write,
2834 .query_dir_first = smb2_query_dir_first,
2835 .query_dir_next = smb2_query_dir_next,
2836 .close_dir = smb2_close_dir,
2837 .calc_smb_size = smb2_calc_size,
2838 .is_status_pending = smb2_is_status_pending,
2839 .is_session_expired = smb2_is_session_expired,
2840 .oplock_response = smb2_oplock_response,
2841 .queryfs = smb2_queryfs,
2842 .mand_lock = smb2_mand_lock,
2843 .mand_unlock_range = smb2_unlock_range,
2844 .push_mand_locks = smb2_push_mandatory_locks,
2845 .get_lease_key = smb2_get_lease_key,
2846 .set_lease_key = smb2_set_lease_key,
2847 .new_lease_key = smb2_new_lease_key,
2848 .calc_signature = smb2_calc_signature,
2849 .is_read_op = smb21_is_read_op,
2850 .set_oplock_level = smb21_set_oplock_level,
2851 .create_lease_buf = smb2_create_lease_buf,
2852 .parse_lease_buf = smb2_parse_lease_buf,
2853 .copychunk_range = smb2_copychunk_range,
2854 .wp_retry_size = smb2_wp_retry_size,
2855 .dir_needs_close = smb2_dir_needs_close,
2856 .enum_snapshots = smb3_enum_snapshots,
2857 .get_dfs_refer = smb2_get_dfs_refer,
2858 .select_sectype = smb2_select_sectype,
2859 #ifdef CONFIG_CIFS_XATTR
2860 .query_all_EAs = smb2_query_eas,
2861 .set_EA = smb2_set_ea,
2862 #endif /* CIFS_XATTR */
2863 #ifdef CONFIG_CIFS_ACL
2864 .get_acl = get_smb2_acl,
2865 .get_acl_by_fid = get_smb2_acl_by_fid,
2866 .set_acl = set_smb2_acl,
2867 #endif /* CIFS_ACL */
2868 };
2869
2870 struct smb_version_operations smb30_operations = {
2871 .compare_fids = smb2_compare_fids,
2872 .setup_request = smb2_setup_request,
2873 .setup_async_request = smb2_setup_async_request,
2874 .check_receive = smb2_check_receive,
2875 .add_credits = smb2_add_credits,
2876 .set_credits = smb2_set_credits,
2877 .get_credits_field = smb2_get_credits_field,
2878 .get_credits = smb2_get_credits,
2879 .wait_mtu_credits = smb2_wait_mtu_credits,
2880 .get_next_mid = smb2_get_next_mid,
2881 .read_data_offset = smb2_read_data_offset,
2882 .read_data_length = smb2_read_data_length,
2883 .map_error = map_smb2_to_linux_error,
2884 .find_mid = smb2_find_mid,
2885 .check_message = smb2_check_message,
2886 .dump_detail = smb2_dump_detail,
2887 .clear_stats = smb2_clear_stats,
2888 .print_stats = smb2_print_stats,
2889 .dump_share_caps = smb2_dump_share_caps,
2890 .is_oplock_break = smb2_is_valid_oplock_break,
2891 .handle_cancelled_mid = smb2_handle_cancelled_mid,
2892 .downgrade_oplock = smb2_downgrade_oplock,
2893 .need_neg = smb2_need_neg,
2894 .negotiate = smb2_negotiate,
2895 .negotiate_wsize = smb2_negotiate_wsize,
2896 .negotiate_rsize = smb2_negotiate_rsize,
2897 .sess_setup = SMB2_sess_setup,
2898 .logoff = SMB2_logoff,
2899 .tree_connect = SMB2_tcon,
2900 .tree_disconnect = SMB2_tdis,
2901 .qfs_tcon = smb3_qfs_tcon,
2902 .is_path_accessible = smb2_is_path_accessible,
2903 .can_echo = smb2_can_echo,
2904 .echo = SMB2_echo,
2905 .query_path_info = smb2_query_path_info,
2906 .get_srv_inum = smb2_get_srv_inum,
2907 .query_file_info = smb2_query_file_info,
2908 .set_path_size = smb2_set_path_size,
2909 .set_file_size = smb2_set_file_size,
2910 .set_file_info = smb2_set_file_info,
2911 .set_compression = smb2_set_compression,
2912 .mkdir = smb2_mkdir,
2913 .mkdir_setinfo = smb2_mkdir_setinfo,
2914 .rmdir = smb2_rmdir,
2915 .unlink = smb2_unlink,
2916 .rename = smb2_rename_path,
2917 .create_hardlink = smb2_create_hardlink,
2918 .query_symlink = smb2_query_symlink,
2919 .query_mf_symlink = smb3_query_mf_symlink,
2920 .create_mf_symlink = smb3_create_mf_symlink,
2921 .open = smb2_open_file,
2922 .set_fid = smb2_set_fid,
2923 .close = smb2_close_file,
2924 .flush = smb2_flush_file,
2925 .async_readv = smb2_async_readv,
2926 .async_writev = smb2_async_writev,
2927 .sync_read = smb2_sync_read,
2928 .sync_write = smb2_sync_write,
2929 .query_dir_first = smb2_query_dir_first,
2930 .query_dir_next = smb2_query_dir_next,
2931 .close_dir = smb2_close_dir,
2932 .calc_smb_size = smb2_calc_size,
2933 .is_status_pending = smb2_is_status_pending,
2934 .is_session_expired = smb2_is_session_expired,
2935 .oplock_response = smb2_oplock_response,
2936 .queryfs = smb2_queryfs,
2937 .mand_lock = smb2_mand_lock,
2938 .mand_unlock_range = smb2_unlock_range,
2939 .push_mand_locks = smb2_push_mandatory_locks,
2940 .get_lease_key = smb2_get_lease_key,
2941 .set_lease_key = smb2_set_lease_key,
2942 .new_lease_key = smb2_new_lease_key,
2943 .generate_signingkey = generate_smb30signingkey,
2944 .calc_signature = smb3_calc_signature,
2945 .set_integrity = smb3_set_integrity,
2946 .is_read_op = smb21_is_read_op,
2947 .set_oplock_level = smb3_set_oplock_level,
2948 .create_lease_buf = smb3_create_lease_buf,
2949 .parse_lease_buf = smb3_parse_lease_buf,
2950 .copychunk_range = smb2_copychunk_range,
2951 .duplicate_extents = smb2_duplicate_extents,
2952 .validate_negotiate = smb3_validate_negotiate,
2953 .wp_retry_size = smb2_wp_retry_size,
2954 .dir_needs_close = smb2_dir_needs_close,
2955 .fallocate = smb3_fallocate,
2956 .enum_snapshots = smb3_enum_snapshots,
2957 .init_transform_rq = smb3_init_transform_rq,
2958 .free_transform_rq = smb3_free_transform_rq,
2959 .is_transform_hdr = smb3_is_transform_hdr,
2960 .receive_transform = smb3_receive_transform,
2961 .get_dfs_refer = smb2_get_dfs_refer,
2962 .select_sectype = smb2_select_sectype,
2963 #ifdef CONFIG_CIFS_XATTR
2964 .query_all_EAs = smb2_query_eas,
2965 .set_EA = smb2_set_ea,
2966 #endif /* CIFS_XATTR */
2967 #ifdef CONFIG_CIFS_ACL
2968 .get_acl = get_smb2_acl,
2969 .get_acl_by_fid = get_smb2_acl_by_fid,
2970 .set_acl = set_smb2_acl,
2971 #endif /* CIFS_ACL */
2972 };
2973
2974 #ifdef CONFIG_CIFS_SMB311
2975 struct smb_version_operations smb311_operations = {
2976 .compare_fids = smb2_compare_fids,
2977 .setup_request = smb2_setup_request,
2978 .setup_async_request = smb2_setup_async_request,
2979 .check_receive = smb2_check_receive,
2980 .add_credits = smb2_add_credits,
2981 .set_credits = smb2_set_credits,
2982 .get_credits_field = smb2_get_credits_field,
2983 .get_credits = smb2_get_credits,
2984 .wait_mtu_credits = smb2_wait_mtu_credits,
2985 .get_next_mid = smb2_get_next_mid,
2986 .read_data_offset = smb2_read_data_offset,
2987 .read_data_length = smb2_read_data_length,
2988 .map_error = map_smb2_to_linux_error,
2989 .find_mid = smb2_find_mid,
2990 .check_message = smb2_check_message,
2991 .dump_detail = smb2_dump_detail,
2992 .clear_stats = smb2_clear_stats,
2993 .print_stats = smb2_print_stats,
2994 .dump_share_caps = smb2_dump_share_caps,
2995 .is_oplock_break = smb2_is_valid_oplock_break,
2996 .handle_cancelled_mid = smb2_handle_cancelled_mid,
2997 .downgrade_oplock = smb2_downgrade_oplock,
2998 .need_neg = smb2_need_neg,
2999 .negotiate = smb2_negotiate,
3000 .negotiate_wsize = smb2_negotiate_wsize,
3001 .negotiate_rsize = smb2_negotiate_rsize,
3002 .sess_setup = SMB2_sess_setup,
3003 .logoff = SMB2_logoff,
3004 .tree_connect = SMB2_tcon,
3005 .tree_disconnect = SMB2_tdis,
3006 .qfs_tcon = smb3_qfs_tcon,
3007 .is_path_accessible = smb2_is_path_accessible,
3008 .can_echo = smb2_can_echo,
3009 .echo = SMB2_echo,
3010 .query_path_info = smb2_query_path_info,
3011 .get_srv_inum = smb2_get_srv_inum,
3012 .query_file_info = smb2_query_file_info,
3013 .set_path_size = smb2_set_path_size,
3014 .set_file_size = smb2_set_file_size,
3015 .set_file_info = smb2_set_file_info,
3016 .set_compression = smb2_set_compression,
3017 .mkdir = smb2_mkdir,
3018 .mkdir_setinfo = smb2_mkdir_setinfo,
3019 .rmdir = smb2_rmdir,
3020 .unlink = smb2_unlink,
3021 .rename = smb2_rename_path,
3022 .create_hardlink = smb2_create_hardlink,
3023 .query_symlink = smb2_query_symlink,
3024 .query_mf_symlink = smb3_query_mf_symlink,
3025 .create_mf_symlink = smb3_create_mf_symlink,
3026 .open = smb2_open_file,
3027 .set_fid = smb2_set_fid,
3028 .close = smb2_close_file,
3029 .flush = smb2_flush_file,
3030 .async_readv = smb2_async_readv,
3031 .async_writev = smb2_async_writev,
3032 .sync_read = smb2_sync_read,
3033 .sync_write = smb2_sync_write,
3034 .query_dir_first = smb2_query_dir_first,
3035 .query_dir_next = smb2_query_dir_next,
3036 .close_dir = smb2_close_dir,
3037 .calc_smb_size = smb2_calc_size,
3038 .is_status_pending = smb2_is_status_pending,
3039 .is_session_expired = smb2_is_session_expired,
3040 .oplock_response = smb2_oplock_response,
3041 .queryfs = smb2_queryfs,
3042 .mand_lock = smb2_mand_lock,
3043 .mand_unlock_range = smb2_unlock_range,
3044 .push_mand_locks = smb2_push_mandatory_locks,
3045 .get_lease_key = smb2_get_lease_key,
3046 .set_lease_key = smb2_set_lease_key,
3047 .new_lease_key = smb2_new_lease_key,
3048 .generate_signingkey = generate_smb311signingkey,
3049 .calc_signature = smb3_calc_signature,
3050 .set_integrity = smb3_set_integrity,
3051 .is_read_op = smb21_is_read_op,
3052 .set_oplock_level = smb3_set_oplock_level,
3053 .create_lease_buf = smb3_create_lease_buf,
3054 .parse_lease_buf = smb3_parse_lease_buf,
3055 .copychunk_range = smb2_copychunk_range,
3056 .duplicate_extents = smb2_duplicate_extents,
3057 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
3058 .wp_retry_size = smb2_wp_retry_size,
3059 .dir_needs_close = smb2_dir_needs_close,
3060 .fallocate = smb3_fallocate,
3061 .enum_snapshots = smb3_enum_snapshots,
3062 .init_transform_rq = smb3_init_transform_rq,
3063 .free_transform_rq = smb3_free_transform_rq,
3064 .is_transform_hdr = smb3_is_transform_hdr,
3065 .receive_transform = smb3_receive_transform,
3066 .get_dfs_refer = smb2_get_dfs_refer,
3067 .select_sectype = smb2_select_sectype,
3068 #ifdef CONFIG_CIFS_XATTR
3069 .query_all_EAs = smb2_query_eas,
3070 .set_EA = smb2_set_ea,
3071 #endif /* CIFS_XATTR */
3072 };
3073 #endif /* CIFS_SMB311 */
3074
3075 struct smb_version_values smb20_values = {
3076 .version_string = SMB20_VERSION_STRING,
3077 .protocol_id = SMB20_PROT_ID,
3078 .req_capabilities = 0, /* MBZ */
3079 .large_lock_type = 0,
3080 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3081 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3082 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3083 .header_size = sizeof(struct smb2_hdr),
3084 .max_header_size = MAX_SMB2_HDR_SIZE,
3085 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3086 .lock_cmd = SMB2_LOCK,
3087 .cap_unix = 0,
3088 .cap_nt_find = SMB2_NT_FIND,
3089 .cap_large_files = SMB2_LARGE_FILES,
3090 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3091 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3092 .create_lease_size = sizeof(struct create_lease),
3093 };
3094
3095 struct smb_version_values smb21_values = {
3096 .version_string = SMB21_VERSION_STRING,
3097 .protocol_id = SMB21_PROT_ID,
3098 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
3099 .large_lock_type = 0,
3100 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3101 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3102 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3103 .header_size = sizeof(struct smb2_hdr),
3104 .max_header_size = MAX_SMB2_HDR_SIZE,
3105 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3106 .lock_cmd = SMB2_LOCK,
3107 .cap_unix = 0,
3108 .cap_nt_find = SMB2_NT_FIND,
3109 .cap_large_files = SMB2_LARGE_FILES,
3110 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3111 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3112 .create_lease_size = sizeof(struct create_lease),
3113 };
3114
3115 struct smb_version_values smb3any_values = {
3116 .version_string = SMB3ANY_VERSION_STRING,
3117 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3118 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3119 .large_lock_type = 0,
3120 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3121 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3122 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3123 .header_size = sizeof(struct smb2_hdr),
3124 .max_header_size = MAX_SMB2_HDR_SIZE,
3125 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3126 .lock_cmd = SMB2_LOCK,
3127 .cap_unix = 0,
3128 .cap_nt_find = SMB2_NT_FIND,
3129 .cap_large_files = SMB2_LARGE_FILES,
3130 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3131 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3132 .create_lease_size = sizeof(struct create_lease_v2),
3133 };
3134
3135 struct smb_version_values smbdefault_values = {
3136 .version_string = SMBDEFAULT_VERSION_STRING,
3137 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3138 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3139 .large_lock_type = 0,
3140 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3141 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3142 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3143 .header_size = sizeof(struct smb2_hdr),
3144 .max_header_size = MAX_SMB2_HDR_SIZE,
3145 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3146 .lock_cmd = SMB2_LOCK,
3147 .cap_unix = 0,
3148 .cap_nt_find = SMB2_NT_FIND,
3149 .cap_large_files = SMB2_LARGE_FILES,
3150 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3151 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3152 .create_lease_size = sizeof(struct create_lease_v2),
3153 };
3154
3155 struct smb_version_values smb30_values = {
3156 .version_string = SMB30_VERSION_STRING,
3157 .protocol_id = SMB30_PROT_ID,
3158 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3159 .large_lock_type = 0,
3160 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3161 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3162 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3163 .header_size = sizeof(struct smb2_hdr),
3164 .max_header_size = MAX_SMB2_HDR_SIZE,
3165 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3166 .lock_cmd = SMB2_LOCK,
3167 .cap_unix = 0,
3168 .cap_nt_find = SMB2_NT_FIND,
3169 .cap_large_files = SMB2_LARGE_FILES,
3170 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3171 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3172 .create_lease_size = sizeof(struct create_lease_v2),
3173 };
3174
3175 struct smb_version_values smb302_values = {
3176 .version_string = SMB302_VERSION_STRING,
3177 .protocol_id = SMB302_PROT_ID,
3178 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3179 .large_lock_type = 0,
3180 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3181 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3182 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3183 .header_size = sizeof(struct smb2_hdr),
3184 .max_header_size = MAX_SMB2_HDR_SIZE,
3185 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3186 .lock_cmd = SMB2_LOCK,
3187 .cap_unix = 0,
3188 .cap_nt_find = SMB2_NT_FIND,
3189 .cap_large_files = SMB2_LARGE_FILES,
3190 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3191 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3192 .create_lease_size = sizeof(struct create_lease_v2),
3193 };
3194
3195 #ifdef CONFIG_CIFS_SMB311
3196 struct smb_version_values smb311_values = {
3197 .version_string = SMB311_VERSION_STRING,
3198 .protocol_id = SMB311_PROT_ID,
3199 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3200 .large_lock_type = 0,
3201 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3202 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3203 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3204 .header_size = sizeof(struct smb2_hdr),
3205 .max_header_size = MAX_SMB2_HDR_SIZE,
3206 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3207 .lock_cmd = SMB2_LOCK,
3208 .cap_unix = 0,
3209 .cap_nt_find = SMB2_NT_FIND,
3210 .cap_large_files = SMB2_LARGE_FILES,
3211 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3212 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3213 .create_lease_size = sizeof(struct create_lease_v2),
3214 };
3215 #endif /* SMB311 */
ubuntu-bionic-kernel mirror