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