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cifs: Make sure all data pages are signed correctly
[linux-2.6-block.git] / fs / cifs / smb2ops.c
CommitLineData
1080ef75
SF		 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
3a3bab50 20#include <linux/pagemap.h>
6fc05c25 21#include <linux/vfs.h>
f29ebb47 22#include <linux/falloc.h>
026e93dc 23#include <linux/scatterlist.h>
4fa8e504 24#include <linux/uuid.h>
026e93dc 25#include <crypto/aead.h>
1080ef75 26#include "cifsglob.h"
2dc7e1c0
PS		 27#include "smb2pdu.h"
28#include "smb2proto.h"
28ea5290
PS		 29#include "cifsproto.h"
30#include "cifs_debug.h"
b42bf888 31#include "cifs_unicode.h"
2e44b288 32#include "smb2status.h"
6fc05c25 33#include "smb2glob.h"
834170c8 34#include "cifs_ioctl.h"
09902f8d 35#include "smbdirect.h"
28ea5290
PS		 36
37static int
38change_conf(struct TCP_Server_Info *server)
39{
40 server->credits += server->echo_credits + server->oplock_credits;
41 server->oplock_credits = server->echo_credits = 0;
42 switch (server->credits) {
43 case 0:
44 return -1;
45 case 1:
46 server->echoes = false;
47 server->oplocks = false;
f96637be 48 cifs_dbg(VFS, "disabling echoes and oplocks\n");
28ea5290
PS		 49 break;
50 case 2:
51 server->echoes = true;
52 server->oplocks = false;
53 server->echo_credits = 1;
f96637be 54 cifs_dbg(FYI, "disabling oplocks\n");
28ea5290
PS		 55 break;
56 default:
57 server->echoes = true;
e0ddde9d
SF		 58 if (enable_oplocks) {
59 server->oplocks = true;
60 server->oplock_credits = 1;
61 } else
62 server->oplocks = false;
63
28ea5290 64 server->echo_credits = 1;
28ea5290
PS		 65 }
66 server->credits -= server->echo_credits + server->oplock_credits;
67 return 0;
68}
69
70static void
71smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
72 const int optype)
73{
74 int *val, rc = 0;
75 spin_lock(&server->req_lock);
76 val = server->ops->get_credits_field(server, optype);
77 *val += add;
141891f4
SF		 78 if (*val > 65000) {
79 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
80 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
81 }
28ea5290 82 server->in_flight--;
ec2e4523 83 if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
28ea5290 84 rc = change_conf(server);
983c88a4
PS		 85 /*
86 * Sometimes server returns 0 credits on oplock break ack - we need to
87 * rebalance credits in this case.
88 */
89 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
90 server->oplocks) {
91 if (server->credits > 1) {
92 server->credits--;
93 server->oplock_credits++;
94 }
95 }
28ea5290
PS		 96 spin_unlock(&server->req_lock);
97 wake_up(&server->request_q);
98 if (rc)
99 cifs_reconnect(server);
100}
101
102static void
103smb2_set_credits(struct TCP_Server_Info *server, const int val)
104{
105 spin_lock(&server->req_lock);
106 server->credits = val;
107 spin_unlock(&server->req_lock);
108}
109
110static int *
111smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
112{
113 switch (optype) {
114 case CIFS_ECHO_OP:
115 return &server->echo_credits;
116 case CIFS_OBREAK_OP:
117 return &server->oplock_credits;
118 default:
119 return &server->credits;
120 }
121}
122
123static unsigned int
124smb2_get_credits(struct mid_q_entry *mid)
125{
49f466bd 126 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)mid->resp_buf;
31473fc4
PS		 127
128 return le16_to_cpu(shdr->CreditRequest);
28ea5290 129}
2dc7e1c0 130
cb7e9eab
PS		 131static int
132smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
133 unsigned int *num, unsigned int *credits)
134{
135 int rc = 0;
136 unsigned int scredits;
137
138 spin_lock(&server->req_lock);
139 while (1) {
140 if (server->credits <= 0) {
141 spin_unlock(&server->req_lock);
142 cifs_num_waiters_inc(server);
143 rc = wait_event_killable(server->request_q,
144 has_credits(server, &server->credits));
145 cifs_num_waiters_dec(server);
146 if (rc)
147 return rc;
148 spin_lock(&server->req_lock);
149 } else {
150 if (server->tcpStatus == CifsExiting) {
151 spin_unlock(&server->req_lock);
152 return -ENOENT;
153 }
154
155 scredits = server->credits;
156 /* can deadlock with reopen */
157 if (scredits == 1) {
158 *num = SMB2_MAX_BUFFER_SIZE;
159 *credits = 0;
160 break;
161 }
162
163 /* leave one credit for a possible reopen */
164 scredits--;
165 *num = min_t(unsigned int, size,
166 scredits * SMB2_MAX_BUFFER_SIZE);
167
168 *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
169 server->credits -= *credits;
170 server->in_flight++;
171 break;
172 }
173 }
174 spin_unlock(&server->req_lock);
175 return rc;
176}
177
2dc7e1c0
PS		 178static __u64
179smb2_get_next_mid(struct TCP_Server_Info *server)
180{
181 __u64 mid;
182 /* for SMB2 we need the current value */
183 spin_lock(&GlobalMid_Lock);
184 mid = server->CurrentMid++;
185 spin_unlock(&GlobalMid_Lock);
186 return mid;
187}
1080ef75 188
093b2bda
PS		 189static struct mid_q_entry *
190smb2_find_mid(struct TCP_Server_Info *server, char *buf)
191{
192 struct mid_q_entry *mid;
49f466bd 193 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
31473fc4 194 __u64 wire_mid = le64_to_cpu(shdr->MessageId);
093b2bda 195
31473fc4 196 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
373512ec
SF		 197 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
198 return NULL;
199 }
200
093b2bda
PS		 201 spin_lock(&GlobalMid_Lock);
202 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
9235d098 203 if ((mid->mid == wire_mid) &&
093b2bda 204 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
31473fc4 205 (mid->command == shdr->Command)) {
696e420b 206 kref_get(&mid->refcount);
093b2bda
PS		 207 spin_unlock(&GlobalMid_Lock);
208 return mid;
209 }
210 }
211 spin_unlock(&GlobalMid_Lock);
212 return NULL;
213}
214
215static void
14547f7d 216smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
093b2bda
PS		 217{
218#ifdef CONFIG_CIFS_DEBUG2
49f466bd 219 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
093b2bda 220
f96637be 221 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
31473fc4
PS		 222 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
223 shdr->ProcessId);
14547f7d 224 cifs_dbg(VFS, "smb buf %p len %u\n", buf,
71992e62 225 server->ops->calc_smb_size(buf, server));
093b2bda
PS		 226#endif
227}
228
ec2e4523
PS		 229static bool
230smb2_need_neg(struct TCP_Server_Info *server)
231{
232 return server->max_read == 0;
233}
234
235static int
236smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
237{
238 int rc;
239 ses->server->CurrentMid = 0;
240 rc = SMB2_negotiate(xid, ses);
241 /* BB we probably don't need to retry with modern servers */
242 if (rc == -EAGAIN)
243 rc = -EHOSTDOWN;
244 return rc;
245}
246
3a3bab50
PS		 247static unsigned int
248smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
249{
250 struct TCP_Server_Info *server = tcon->ses->server;
251 unsigned int wsize;
252
253 /* start with specified wsize, or default */
254 wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
255 wsize = min_t(unsigned int, wsize, server->max_write);
09902f8d 256#ifdef CONFIG_CIFS_SMB_DIRECT
bb4c0419
LL		 257 if (server->rdma) {
258 if (server->sign)
259 wsize = min_t(unsigned int,
260 wsize, server->smbd_conn->max_fragmented_send_size);
261 else
262 wsize = min_t(unsigned int,
09902f8d 263 wsize, server->smbd_conn->max_readwrite_size);
bb4c0419 264 }
09902f8d 265#endif
cb7e9eab
PS		 266 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
267 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
3a3bab50 268
3a3bab50
PS		 269 return wsize;
270}
271
272static unsigned int
273smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
274{
275 struct TCP_Server_Info *server = tcon->ses->server;
276 unsigned int rsize;
277
278 /* start with specified rsize, or default */
279 rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
280 rsize = min_t(unsigned int, rsize, server->max_read);
09902f8d 281#ifdef CONFIG_CIFS_SMB_DIRECT
bb4c0419
LL		 282 if (server->rdma) {
283 if (server->sign)
284 rsize = min_t(unsigned int,
285 rsize, server->smbd_conn->max_fragmented_recv_size);
286 else
287 rsize = min_t(unsigned int,
09902f8d 288 rsize, server->smbd_conn->max_readwrite_size);
bb4c0419 289 }
09902f8d 290#endif
bed9da02
PS		 291
292 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
293 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
3a3bab50 294
3a3bab50
PS		 295 return rsize;
296}
297
fe856be4
AA		 298
299static int
300parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
301 size_t buf_len,
302 struct cifs_server_iface **iface_list,
303 size_t *iface_count)
304{
305 struct network_interface_info_ioctl_rsp *p;
306 struct sockaddr_in *addr4;
307 struct sockaddr_in6 *addr6;
308 struct iface_info_ipv4 *p4;
309 struct iface_info_ipv6 *p6;
310 struct cifs_server_iface *info;
311 ssize_t bytes_left;
312 size_t next = 0;
313 int nb_iface = 0;
314 int rc = 0;
315
316 *iface_list = NULL;
317 *iface_count = 0;
318
319 /*
320 * Fist pass: count and sanity check
321 */
322
323 bytes_left = buf_len;
324 p = buf;
325 while (bytes_left >= sizeof(*p)) {
326 nb_iface++;
327 next = le32_to_cpu(p->Next);
328 if (!next) {
329 bytes_left -= sizeof(*p);
330 break;
331 }
332 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
333 bytes_left -= next;
334 }
335
336 if (!nb_iface) {
337 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
338 rc = -EINVAL;
339 goto out;
340 }
341
342 if (bytes_left || p->Next)
343 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
344
345
346 /*
347 * Second pass: extract info to internal structure
348 */
349
350 *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
351 if (!*iface_list) {
352 rc = -ENOMEM;
353 goto out;
354 }
355
356 info = *iface_list;
357 bytes_left = buf_len;
358 p = buf;
359 while (bytes_left >= sizeof(*p)) {
360 info->speed = le64_to_cpu(p->LinkSpeed);
361 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
362 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
363
364 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
365 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
366 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
367 le32_to_cpu(p->Capability));
368
369 switch (p->Family) {
370 /*
371 * The kernel and wire socket structures have the same
372 * layout and use network byte order but make the
373 * conversion explicit in case either one changes.
374 */
375 case INTERNETWORK:
376 addr4 = (struct sockaddr_in *)&info->sockaddr;
377 p4 = (struct iface_info_ipv4 *)p->Buffer;
378 addr4->sin_family = AF_INET;
379 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
380
381 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
382 addr4->sin_port = cpu_to_be16(CIFS_PORT);
383
384 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
385 &addr4->sin_addr);
386 break;
387 case INTERNETWORKV6:
388 addr6 = (struct sockaddr_in6 *)&info->sockaddr;
389 p6 = (struct iface_info_ipv6 *)p->Buffer;
390 addr6->sin6_family = AF_INET6;
391 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
392
393 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
394 addr6->sin6_flowinfo = 0;
395 addr6->sin6_scope_id = 0;
396 addr6->sin6_port = cpu_to_be16(CIFS_PORT);
397
398 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
399 &addr6->sin6_addr);
400 break;
401 default:
402 cifs_dbg(VFS,
403 "%s: skipping unsupported socket family\n",
404 __func__);
405 goto next_iface;
406 }
407
408 (*iface_count)++;
409 info++;
410next_iface:
411 next = le32_to_cpu(p->Next);
412 if (!next)
413 break;
414 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
415 bytes_left -= next;
416 }
417
418 if (!*iface_count) {
419 rc = -EINVAL;
420 goto out;
421 }
422
423out:
424 if (rc) {
425 kfree(*iface_list);
426 *iface_count = 0;
427 *iface_list = NULL;
428 }
429 return rc;
430}
431
432
c481e9fe
SF		 433static int
434SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
435{
436 int rc;
437 unsigned int ret_data_len = 0;
fe856be4
AA		 438 struct network_interface_info_ioctl_rsp *out_buf = NULL;
439 struct cifs_server_iface *iface_list;
440 size_t iface_count;
441 struct cifs_ses *ses = tcon->ses;
c481e9fe
SF		 442
443 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
444 FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
445 NULL /* no data input */, 0 /* no data input */,
446 (char **)&out_buf, &ret_data_len);
fe856be4 447 if (rc != 0) {
9ffc5412 448 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
fe856be4 449 goto out;
9ffc5412 450 }
fe856be4
AA		 451
452 rc = parse_server_interfaces(out_buf, ret_data_len,
453 &iface_list, &iface_count);
454 if (rc)
455 goto out;
456
457 spin_lock(&ses->iface_lock);
458 kfree(ses->iface_list);
459 ses->iface_list = iface_list;
460 ses->iface_count = iface_count;
461 ses->iface_last_update = jiffies;
462 spin_unlock(&ses->iface_lock);
463
464out:
24df1483 465 kfree(out_buf);
c481e9fe
SF		 466 return rc;
467}
c481e9fe 468
a93864d9
RS		 469void
470smb2_cached_lease_break(struct work_struct *work)
471{
472 struct cached_fid *cfid = container_of(work,
473 struct cached_fid, lease_break);
474 mutex_lock(&cfid->fid_mutex);
475 if (cfid->is_valid) {
476 cifs_dbg(FYI, "clear cached root file handle\n");
477 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
478 cfid->fid->volatile_fid);
479 cfid->is_valid = false;
480 }
481 mutex_unlock(&cfid->fid_mutex);
482}
483
3d4ef9a1
SF		 484/*
485 * Open the directory at the root of a share
486 */
487int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
488{
489 struct cifs_open_parms oparams;
490 int rc;
491 __le16 srch_path = 0; /* Null - since an open of top of share */
a93864d9 492 u8 oplock = SMB2_OPLOCK_LEVEL_II;
3d4ef9a1 493
a93864d9
RS		 494 mutex_lock(&tcon->crfid.fid_mutex);
495 if (tcon->crfid.is_valid) {
3d4ef9a1 496 cifs_dbg(FYI, "found a cached root file handle\n");
a93864d9
RS		 497 memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
498 mutex_unlock(&tcon->crfid.fid_mutex);
3d4ef9a1
SF		 499 return 0;
500 }
501
502 oparams.tcon = tcon;
503 oparams.create_options = 0;
504 oparams.desired_access = FILE_READ_ATTRIBUTES;
505 oparams.disposition = FILE_OPEN;
506 oparams.fid = pfid;
507 oparams.reconnect = false;
508
9d874c36 509 rc = SMB2_open(xid, &oparams, &srch_path, &oplock, NULL, NULL, NULL);
3d4ef9a1 510 if (rc == 0) {
a93864d9
RS		 511 memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
512 tcon->crfid.tcon = tcon;
513 tcon->crfid.is_valid = true;
3d4ef9a1 514 }
a93864d9 515 mutex_unlock(&tcon->crfid.fid_mutex);
3d4ef9a1
SF		 516 return rc;
517}
518
af6a12ea
SF		 519static void
520smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
521{
522 int rc;
523 __le16 srch_path = 0; /* Null - open root of share */
524 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
525 struct cifs_open_parms oparms;
526 struct cifs_fid fid;
3d4ef9a1 527 bool no_cached_open = tcon->nohandlecache;
af6a12ea
SF		 528
529 oparms.tcon = tcon;
530 oparms.desired_access = FILE_READ_ATTRIBUTES;
531 oparms.disposition = FILE_OPEN;
532 oparms.create_options = 0;
533 oparms.fid = &fid;
534 oparms.reconnect = false;
535
3d4ef9a1 536 if (no_cached_open)
9d874c36
RS		 537 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
538 NULL);
3d4ef9a1
SF		 539 else
540 rc = open_shroot(xid, tcon, &fid);
541
af6a12ea
SF		 542 if (rc)
543 return;
544
c481e9fe 545 SMB3_request_interfaces(xid, tcon);
c481e9fe 546
af6a12ea
SF		 547 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
548 FS_ATTRIBUTE_INFORMATION);
549 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
550 FS_DEVICE_INFORMATION);
551 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
552 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
3d4ef9a1
SF		 553 if (no_cached_open)
554 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
af6a12ea
SF		 555 return;
556}
557
34f62640
SF		 558static void
559smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
560{
561 int rc;
562 __le16 srch_path = 0; /* Null - open root of share */
563 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
564 struct cifs_open_parms oparms;
565 struct cifs_fid fid;
566
567 oparms.tcon = tcon;
568 oparms.desired_access = FILE_READ_ATTRIBUTES;
569 oparms.disposition = FILE_OPEN;
570 oparms.create_options = 0;
571 oparms.fid = &fid;
572 oparms.reconnect = false;
573
9d874c36 574 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
34f62640
SF		 575 if (rc)
576 return;
577
2167114c
SF		 578 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
579 FS_ATTRIBUTE_INFORMATION);
580 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
581 FS_DEVICE_INFORMATION);
34f62640
SF		 582 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
583 return;
584}
585
2503a0db
PS		 586static int
587smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
588 struct cifs_sb_info *cifs_sb, const char *full_path)
589{
590 int rc;
2503a0db 591 __le16 *utf16_path;
2e44b288 592 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
064f6047
PS		 593 struct cifs_open_parms oparms;
594 struct cifs_fid fid;
2503a0db 595
a93864d9 596 if ((*full_path == 0) && tcon->crfid.is_valid)
3d4ef9a1
SF		 597 return 0;
598
2503a0db
PS		 599 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
600 if (!utf16_path)
601 return -ENOMEM;
602
064f6047
PS		 603 oparms.tcon = tcon;
604 oparms.desired_access = FILE_READ_ATTRIBUTES;
605 oparms.disposition = FILE_OPEN;
606 oparms.create_options = 0;
607 oparms.fid = &fid;
9cbc0b73 608 oparms.reconnect = false;
064f6047 609
9d874c36 610 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2503a0db
PS		 611 if (rc) {
612 kfree(utf16_path);
613 return rc;
614 }
615
064f6047 616 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2503a0db
PS		 617 kfree(utf16_path);
618 return rc;
619}
620
be4cb9e3
PS		 621static int
622smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
623 struct cifs_sb_info *cifs_sb, const char *full_path,
624 u64 *uniqueid, FILE_ALL_INFO *data)
625{
626 *uniqueid = le64_to_cpu(data->IndexNumber);
627 return 0;
628}
629
b7546bc5
PS		 630static int
631smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
632 struct cifs_fid *fid, FILE_ALL_INFO *data)
633{
634 int rc;
635 struct smb2_file_all_info *smb2_data;
636
1bbe4997 637 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
b7546bc5
PS		 638 GFP_KERNEL);
639 if (smb2_data == NULL)
640 return -ENOMEM;
641
642 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
643 smb2_data);
644 if (!rc)
645 move_smb2_info_to_cifs(data, smb2_data);
646 kfree(smb2_data);
647 return rc;
648}
649
1368f155 650#ifdef CONFIG_CIFS_XATTR
95907fea
RS		 651static ssize_t
652move_smb2_ea_to_cifs(char *dst, size_t dst_size,
653 struct smb2_file_full_ea_info *src, size_t src_size,
654 const unsigned char *ea_name)
655{
656 int rc = 0;
657 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
658 char *name, *value;
659 size_t name_len, value_len, user_name_len;
660
661 while (src_size > 0) {
662 name = &src->ea_data[0];
663 name_len = (size_t)src->ea_name_length;
664 value = &src->ea_data[src->ea_name_length + 1];
665 value_len = (size_t)le16_to_cpu(src->ea_value_length);
666
667 if (name_len == 0) {
668 break;
669 }
670
671 if (src_size < 8 + name_len + 1 + value_len) {
672 cifs_dbg(FYI, "EA entry goes beyond length of list\n");
673 rc = -EIO;
674 goto out;
675 }
676
677 if (ea_name) {
678 if (ea_name_len == name_len &&
679 memcmp(ea_name, name, name_len) == 0) {
680 rc = value_len;
681 if (dst_size == 0)
682 goto out;
683 if (dst_size < value_len) {
684 rc = -ERANGE;
685 goto out;
686 }
687 memcpy(dst, value, value_len);
688 goto out;
689 }
690 } else {
691 /* 'user.' plus a terminating null */
692 user_name_len = 5 + 1 + name_len;
693
694 rc += user_name_len;
695
696 if (dst_size >= user_name_len) {
697 dst_size -= user_name_len;
698 memcpy(dst, "user.", 5);
699 dst += 5;
700 memcpy(dst, src->ea_data, name_len);
701 dst += name_len;
702 *dst = 0;
703 ++dst;
704 } else if (dst_size == 0) {
705 /* skip copy - calc size only */
706 } else {
707 /* stop before overrun buffer */
708 rc = -ERANGE;
709 break;
710 }
711 }
712
713 if (!src->next_entry_offset)
714 break;
715
716 if (src_size < le32_to_cpu(src->next_entry_offset)) {
717 /* stop before overrun buffer */
718 rc = -ERANGE;
719 break;
720 }
721 src_size -= le32_to_cpu(src->next_entry_offset);
722 src = (void *)((char *)src +
723 le32_to_cpu(src->next_entry_offset));
724 }
725
726 /* didn't find the named attribute */
727 if (ea_name)
728 rc = -ENODATA;
729
730out:
731 return (ssize_t)rc;
732}
733
734static ssize_t
735smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
736 const unsigned char *path, const unsigned char *ea_name,
737 char *ea_data, size_t buf_size,
738 struct cifs_sb_info *cifs_sb)
739{
740 int rc;
741 __le16 *utf16_path;
742 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
743 struct cifs_open_parms oparms;
744 struct cifs_fid fid;
745 struct smb2_file_full_ea_info *smb2_data;
7cb3def4 746 int ea_buf_size = SMB2_MIN_EA_BUF;
95907fea
RS		 747
748 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
749 if (!utf16_path)
750 return -ENOMEM;
751
752 oparms.tcon = tcon;
753 oparms.desired_access = FILE_READ_EA;
754 oparms.disposition = FILE_OPEN;
755 oparms.create_options = 0;
756 oparms.fid = &fid;
757 oparms.reconnect = false;
758
9d874c36 759 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
95907fea
RS		 760 kfree(utf16_path);
761 if (rc) {
762 cifs_dbg(FYI, "open failed rc=%d\n", rc);
763 return rc;
764 }
765
7cb3def4
RS		 766 while (1) {
767 smb2_data = kzalloc(ea_buf_size, GFP_KERNEL);
768 if (smb2_data == NULL) {
769 SMB2_close(xid, tcon, fid.persistent_fid,
770 fid.volatile_fid);
771 return -ENOMEM;
772 }
773
774 rc = SMB2_query_eas(xid, tcon, fid.persistent_fid,
775 fid.volatile_fid,
776 ea_buf_size, smb2_data);
777
778 if (rc != -E2BIG)
779 break;
780
781 kfree(smb2_data);
782 ea_buf_size <<= 1;
783
784 if (ea_buf_size > SMB2_MAX_EA_BUF) {
785 cifs_dbg(VFS, "EA size is too large\n");
786 SMB2_close(xid, tcon, fid.persistent_fid,
787 fid.volatile_fid);
788 return -ENOMEM;
789 }
95907fea
RS		 790 }
791
95907fea
RS		 792 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
793
ae2cd7fb
PA		 794 /*
795 * If ea_name is NULL (listxattr) and there are no EAs, return 0 as it's
796 * not an error. Otherwise, the specified ea_name was not found.
797 */
95907fea
RS		 798 if (!rc)
799 rc = move_smb2_ea_to_cifs(ea_data, buf_size, smb2_data,
800 SMB2_MAX_EA_BUF, ea_name);
ae2cd7fb
PA		 801 else if (!ea_name && rc == -ENODATA)
802 rc = 0;
95907fea
RS		 803
804 kfree(smb2_data);
805 return rc;
806}
807
5517554e
RS		 808
809static int
810smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
811 const char *path, const char *ea_name, const void *ea_value,
812 const __u16 ea_value_len, const struct nls_table *nls_codepage,
813 struct cifs_sb_info *cifs_sb)
814{
815 int rc;
816 __le16 *utf16_path;
817 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
818 struct cifs_open_parms oparms;
819 struct cifs_fid fid;
820 struct smb2_file_full_ea_info *ea;
821 int ea_name_len = strlen(ea_name);
822 int len;
823
824 if (ea_name_len > 255)
825 return -EINVAL;
826
827 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
828 if (!utf16_path)
829 return -ENOMEM;
830
831 oparms.tcon = tcon;
832 oparms.desired_access = FILE_WRITE_EA;
833 oparms.disposition = FILE_OPEN;
834 oparms.create_options = 0;
835 oparms.fid = &fid;
836 oparms.reconnect = false;
837
9d874c36 838 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
5517554e
RS		 839 kfree(utf16_path);
840 if (rc) {
841 cifs_dbg(FYI, "open failed rc=%d\n", rc);
842 return rc;
843 }
844
845 len = sizeof(ea) + ea_name_len + ea_value_len + 1;
846 ea = kzalloc(len, GFP_KERNEL);
847 if (ea == NULL) {
848 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
849 return -ENOMEM;
850 }
851
852 ea->ea_name_length = ea_name_len;
853 ea->ea_value_length = cpu_to_le16(ea_value_len);
854 memcpy(ea->ea_data, ea_name, ea_name_len + 1);
855 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
856
857 rc = SMB2_set_ea(xid, tcon, fid.persistent_fid, fid.volatile_fid, ea,
858 len);
6aa0c114
PA		 859 kfree(ea);
860
5517554e
RS		 861 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
862
863 return rc;
864}
1368f155 865#endif
5517554e 866
9094fad1
PS		 867static bool
868smb2_can_echo(struct TCP_Server_Info *server)
869{
870 return server->echoes;
871}
872
d60622eb
PS		 873static void
874smb2_clear_stats(struct cifs_tcon *tcon)
875{
876#ifdef CONFIG_CIFS_STATS
877 int i;
878 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
879 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
880 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
881 }
882#endif
883}
884
769ee6a4
SF		 885static void
886smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
887{
888 seq_puts(m, "\n\tShare Capabilities:");
889 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
890 seq_puts(m, " DFS,");
891 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
892 seq_puts(m, " CONTINUOUS AVAILABILITY,");
893 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
894 seq_puts(m, " SCALEOUT,");
895 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
896 seq_puts(m, " CLUSTER,");
897 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
898 seq_puts(m, " ASYMMETRIC,");
899 if (tcon->capabilities == 0)
900 seq_puts(m, " None");
af6a12ea
SF		 901 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
902 seq_puts(m, " Aligned,");
903 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
904 seq_puts(m, " Partition Aligned,");
905 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
906 seq_puts(m, " SSD,");
907 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
908 seq_puts(m, " TRIM-support,");
909
769ee6a4 910 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
e0386e44 911 seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
af6a12ea
SF		 912 if (tcon->perf_sector_size)
913 seq_printf(m, "\tOptimal sector size: 0x%x",
914 tcon->perf_sector_size);
e0386e44 915 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
769ee6a4
SF		 916}
917
d60622eb
PS		 918static void
919smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
920{
921#ifdef CONFIG_CIFS_STATS
922 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
923 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
924 seq_printf(m, "\nNegotiates: %d sent %d failed",
925 atomic_read(&sent[SMB2_NEGOTIATE_HE]),
926 atomic_read(&failed[SMB2_NEGOTIATE_HE]));
927 seq_printf(m, "\nSessionSetups: %d sent %d failed",
928 atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
929 atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
d60622eb
PS		 930 seq_printf(m, "\nLogoffs: %d sent %d failed",
931 atomic_read(&sent[SMB2_LOGOFF_HE]),
932 atomic_read(&failed[SMB2_LOGOFF_HE]));
933 seq_printf(m, "\nTreeConnects: %d sent %d failed",
934 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
935 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
936 seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
937 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
938 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
939 seq_printf(m, "\nCreates: %d sent %d failed",
940 atomic_read(&sent[SMB2_CREATE_HE]),
941 atomic_read(&failed[SMB2_CREATE_HE]));
942 seq_printf(m, "\nCloses: %d sent %d failed",
943 atomic_read(&sent[SMB2_CLOSE_HE]),
944 atomic_read(&failed[SMB2_CLOSE_HE]));
945 seq_printf(m, "\nFlushes: %d sent %d failed",
946 atomic_read(&sent[SMB2_FLUSH_HE]),
947 atomic_read(&failed[SMB2_FLUSH_HE]));
948 seq_printf(m, "\nReads: %d sent %d failed",
949 atomic_read(&sent[SMB2_READ_HE]),
950 atomic_read(&failed[SMB2_READ_HE]));
951 seq_printf(m, "\nWrites: %d sent %d failed",
952 atomic_read(&sent[SMB2_WRITE_HE]),
953 atomic_read(&failed[SMB2_WRITE_HE]));
954 seq_printf(m, "\nLocks: %d sent %d failed",
955 atomic_read(&sent[SMB2_LOCK_HE]),
956 atomic_read(&failed[SMB2_LOCK_HE]));
957 seq_printf(m, "\nIOCTLs: %d sent %d failed",
958 atomic_read(&sent[SMB2_IOCTL_HE]),
959 atomic_read(&failed[SMB2_IOCTL_HE]));
960 seq_printf(m, "\nCancels: %d sent %d failed",
961 atomic_read(&sent[SMB2_CANCEL_HE]),
962 atomic_read(&failed[SMB2_CANCEL_HE]));
963 seq_printf(m, "\nEchos: %d sent %d failed",
964 atomic_read(&sent[SMB2_ECHO_HE]),
965 atomic_read(&failed[SMB2_ECHO_HE]));
966 seq_printf(m, "\nQueryDirectories: %d sent %d failed",
967 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
968 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
969 seq_printf(m, "\nChangeNotifies: %d sent %d failed",
970 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
971 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
972 seq_printf(m, "\nQueryInfos: %d sent %d failed",
973 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
974 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
975 seq_printf(m, "\nSetInfos: %d sent %d failed",
976 atomic_read(&sent[SMB2_SET_INFO_HE]),
977 atomic_read(&failed[SMB2_SET_INFO_HE]));
978 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
979 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
980 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
981#endif
982}
983
f0df737e
PS		 984static void
985smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
986{
2b0143b5 987 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
53ef1016
PS		 988 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
989
f0df737e
PS		 990 cfile->fid.persistent_fid = fid->persistent_fid;
991 cfile->fid.volatile_fid = fid->volatile_fid;
42873b0a
PS		 992 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
993 &fid->purge_cache);
18cceb6a 994 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
94f87371 995 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
f0df737e
PS		 996}
997
760ad0ca 998static void
f0df737e
PS		 999smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1000 struct cifs_fid *fid)
1001{
760ad0ca 1002 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
f0df737e
PS		 1003}
1004
41c1358e
SF		 1005static int
1006SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1007 u64 persistent_fid, u64 volatile_fid,
1008 struct copychunk_ioctl *pcchunk)
1009{
1010 int rc;
1011 unsigned int ret_data_len;
1012 struct resume_key_req *res_key;
1013
1014 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1015 FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1016 NULL, 0 /* no input */,
1017 (char **)&res_key, &ret_data_len);
1018
1019 if (rc) {
1020 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1021 goto req_res_key_exit;
1022 }
1023 if (ret_data_len < sizeof(struct resume_key_req)) {
1024 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
1025 rc = -EINVAL;
1026 goto req_res_key_exit;
1027 }
1028 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1029
1030req_res_key_exit:
1031 kfree(res_key);
1032 return rc;
1033}
1034
620d8745 1035static ssize_t
312bbc59 1036smb2_copychunk_range(const unsigned int xid,
41c1358e
SF		 1037 struct cifsFileInfo *srcfile,
1038 struct cifsFileInfo *trgtfile, u64 src_off,
1039 u64 len, u64 dest_off)
1040{
1041 int rc;
1042 unsigned int ret_data_len;
1043 struct copychunk_ioctl *pcchunk;
9bf0c9cd
SF		 1044 struct copychunk_ioctl_rsp *retbuf = NULL;
1045 struct cifs_tcon *tcon;
1046 int chunks_copied = 0;
1047 bool chunk_sizes_updated = false;
620d8745 1048 ssize_t bytes_written, total_bytes_written = 0;
41c1358e
SF		 1049
1050 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1051
1052 if (pcchunk == NULL)
1053 return -ENOMEM;
1054
312bbc59 1055 cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
41c1358e
SF		 1056 /* Request a key from the server to identify the source of the copy */
1057 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1058 srcfile->fid.persistent_fid,
1059 srcfile->fid.volatile_fid, pcchunk);
1060
1061 /* Note: request_res_key sets res_key null only if rc !=0 */
1062 if (rc)
9bf0c9cd 1063 goto cchunk_out;
41c1358e
SF		 1064
1065 /* For now array only one chunk long, will make more flexible later */
bc09d141 1066 pcchunk->ChunkCount = cpu_to_le32(1);
41c1358e 1067 pcchunk->Reserved = 0;
41c1358e
SF		 1068 pcchunk->Reserved2 = 0;
1069
9bf0c9cd 1070 tcon = tlink_tcon(trgtfile->tlink);
41c1358e 1071
9bf0c9cd
SF		 1072 while (len > 0) {
1073 pcchunk->SourceOffset = cpu_to_le64(src_off);
1074 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1075 pcchunk->Length =
1076 cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
41c1358e 1077
9bf0c9cd
SF		 1078 /* Request server copy to target from src identified by key */
1079 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1080 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
63a83b86 1081 true /* is_fsctl */, (char *)pcchunk,
9bf0c9cd
SF		 1082 sizeof(struct copychunk_ioctl), (char **)&retbuf,
1083 &ret_data_len);
1084 if (rc == 0) {
1085 if (ret_data_len !=
1086 sizeof(struct copychunk_ioctl_rsp)) {
1087 cifs_dbg(VFS, "invalid cchunk response size\n");
1088 rc = -EIO;
1089 goto cchunk_out;
1090 }
1091 if (retbuf->TotalBytesWritten == 0) {
1092 cifs_dbg(FYI, "no bytes copied\n");
1093 rc = -EIO;
1094 goto cchunk_out;
1095 }
1096 /*
1097 * Check if server claimed to write more than we asked
1098 */
1099 if (le32_to_cpu(retbuf->TotalBytesWritten) >
1100 le32_to_cpu(pcchunk->Length)) {
1101 cifs_dbg(VFS, "invalid copy chunk response\n");
1102 rc = -EIO;
1103 goto cchunk_out;
1104 }
1105 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1106 cifs_dbg(VFS, "invalid num chunks written\n");
1107 rc = -EIO;
1108 goto cchunk_out;
1109 }
1110 chunks_copied++;
1111
620d8745
SP		 1112 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1113 src_off += bytes_written;
1114 dest_off += bytes_written;
1115 len -= bytes_written;
1116 total_bytes_written += bytes_written;
9bf0c9cd 1117
620d8745 1118 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
9bf0c9cd
SF		 1119 le32_to_cpu(retbuf->ChunksWritten),
1120 le32_to_cpu(retbuf->ChunkBytesWritten),
620d8745 1121 bytes_written);
9bf0c9cd
SF		 1122 } else if (rc == -EINVAL) {
1123 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1124 goto cchunk_out;
1125
1126 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1127 le32_to_cpu(retbuf->ChunksWritten),
1128 le32_to_cpu(retbuf->ChunkBytesWritten),
1129 le32_to_cpu(retbuf->TotalBytesWritten));
1130
1131 /*
1132 * Check if this is the first request using these sizes,
1133 * (ie check if copy succeed once with original sizes
1134 * and check if the server gave us different sizes after
1135 * we already updated max sizes on previous request).
1136 * if not then why is the server returning an error now
1137 */
1138 if ((chunks_copied != 0) || chunk_sizes_updated)
1139 goto cchunk_out;
1140
1141 /* Check that server is not asking us to grow size */
1142 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1143 tcon->max_bytes_chunk)
1144 tcon->max_bytes_chunk =
1145 le32_to_cpu(retbuf->ChunkBytesWritten);
1146 else
1147 goto cchunk_out; /* server gave us bogus size */
1148
1149 /* No need to change MaxChunks since already set to 1 */
1150 chunk_sizes_updated = true;
2477bc58
SP		 1151 } else
1152 goto cchunk_out;
9bf0c9cd 1153 }
41c1358e 1154
9bf0c9cd 1155cchunk_out:
41c1358e 1156 kfree(pcchunk);
24df1483 1157 kfree(retbuf);
620d8745
SP		 1158 if (rc)
1159 return rc;
1160 else
1161 return total_bytes_written;
41c1358e
SF		 1162}
1163
7a5cfb19
PS		 1164static int
1165smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1166 struct cifs_fid *fid)
1167{
1168 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1169}
1170
09a4707e
PS		 1171static unsigned int
1172smb2_read_data_offset(char *buf)
1173{
1174 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1175 return rsp->DataOffset;
1176}
1177
1178static unsigned int
74dcf418 1179smb2_read_data_length(char *buf, bool in_remaining)
09a4707e
PS		 1180{
1181 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
74dcf418
LL		 1182
1183 if (in_remaining)
1184 return le32_to_cpu(rsp->DataRemaining);
1185
09a4707e
PS		 1186 return le32_to_cpu(rsp->DataLength);
1187}
1188
d8e05039
PS		 1189
1190static int
db8b631d 1191smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
d8e05039
PS		 1192 struct cifs_io_parms *parms, unsigned int *bytes_read,
1193 char **buf, int *buf_type)
1194{
db8b631d
SF		 1195 parms->persistent_fid = pfid->persistent_fid;
1196 parms->volatile_fid = pfid->volatile_fid;
d8e05039
PS		 1197 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1198}
1199
009d3443 1200static int
db8b631d 1201smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
009d3443
PS		 1202 struct cifs_io_parms *parms, unsigned int *written,
1203 struct kvec *iov, unsigned long nr_segs)
1204{
1205
db8b631d
SF		 1206 parms->persistent_fid = pfid->persistent_fid;
1207 parms->volatile_fid = pfid->volatile_fid;
009d3443
PS		 1208 return SMB2_write(xid, parms, written, iov, nr_segs);
1209}
1210
d43cc793
SF		 1211/* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1212static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1213 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1214{
1215 struct cifsInodeInfo *cifsi;
1216 int rc;
1217
1218 cifsi = CIFS_I(inode);
1219
1220 /* if file already sparse don't bother setting sparse again */
1221 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1222 return true; /* already sparse */
1223
1224 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1225 return true; /* already not sparse */
1226
1227 /*
1228 * Can't check for sparse support on share the usual way via the
1229 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1230 * since Samba server doesn't set the flag on the share, yet
1231 * supports the set sparse FSCTL and returns sparse correctly
1232 * in the file attributes. If we fail setting sparse though we
1233 * mark that server does not support sparse files for this share
1234 * to avoid repeatedly sending the unsupported fsctl to server
1235 * if the file is repeatedly extended.
1236 */
1237 if (tcon->broken_sparse_sup)
1238 return false;
1239
1240 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1241 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
63a83b86 1242 true /* is_fctl */,
51146625 1243 &setsparse, 1, NULL, NULL);
d43cc793
SF		 1244 if (rc) {
1245 tcon->broken_sparse_sup = true;
1246 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1247 return false;
1248 }
1249
1250 if (setsparse)
1251 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1252 else
1253 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1254
1255 return true;
1256}
1257
c839ff24
PS		 1258static int
1259smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1260 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1261{
1262 __le64 eof = cpu_to_le64(size);
3d1a3745
SF		 1263 struct inode *inode;
1264
1265 /*
1266 * If extending file more than one page make sparse. Many Linux fs
1267 * make files sparse by default when extending via ftruncate
1268 */
2b0143b5 1269 inode = d_inode(cfile->dentry);
3d1a3745
SF		 1270
1271 if (!set_alloc && (size > inode->i_size + 8192)) {
3d1a3745 1272 __u8 set_sparse = 1;
d43cc793
SF		 1273
1274 /* whether set sparse succeeds or not, extend the file */
1275 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
3d1a3745
SF		 1276 }
1277
c839ff24 1278 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
f29ebb47 1279 cfile->fid.volatile_fid, cfile->pid, &eof, false);
c839ff24
PS		 1280}
1281
02b16665
SF		 1282static int
1283smb2_duplicate_extents(const unsigned int xid,
1284 struct cifsFileInfo *srcfile,
1285 struct cifsFileInfo *trgtfile, u64 src_off,
1286 u64 len, u64 dest_off)
1287{
1288 int rc;
1289 unsigned int ret_data_len;
02b16665
SF		 1290 struct duplicate_extents_to_file dup_ext_buf;
1291 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1292
1293 /* server fileays advertise duplicate extent support with this flag */
1294 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1295 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1296 return -EOPNOTSUPP;
1297
1298 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1299 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1300 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1301 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1302 dup_ext_buf.ByteCount = cpu_to_le64(len);
1303 cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
1304 src_off, dest_off, len);
1305
1306 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1307 if (rc)
1308 goto duplicate_extents_out;
1309
1310 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1311 trgtfile->fid.volatile_fid,
1312 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
63a83b86 1313 true /* is_fsctl */,
51146625 1314 (char *)&dup_ext_buf,
02b16665 1315 sizeof(struct duplicate_extents_to_file),
24df1483 1316 NULL,
02b16665
SF		 1317 &ret_data_len);
1318
1319 if (ret_data_len > 0)
1320 cifs_dbg(FYI, "non-zero response length in duplicate extents");
1321
1322duplicate_extents_out:
1323 return rc;
1324}
02b16665 1325
64a5cfa6
SF		 1326static int
1327smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1328 struct cifsFileInfo *cfile)
1329{
1330 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1331 cfile->fid.volatile_fid);
1332}
1333
b3152e2c
SF		 1334static int
1335smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1336 struct cifsFileInfo *cfile)
1337{
1338 struct fsctl_set_integrity_information_req integr_info;
b3152e2c
SF		 1339 unsigned int ret_data_len;
1340
1341 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1342 integr_info.Flags = 0;
1343 integr_info.Reserved = 0;
1344
1345 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1346 cfile->fid.volatile_fid,
1347 FSCTL_SET_INTEGRITY_INFORMATION,
63a83b86 1348 true /* is_fsctl */,
51146625 1349 (char *)&integr_info,
b3152e2c 1350 sizeof(struct fsctl_set_integrity_information_req),
24df1483 1351 NULL,
b3152e2c
SF		 1352 &ret_data_len);
1353
1354}
1355
834170c8
SF		 1356static int
1357smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1358 struct cifsFileInfo *cfile, void __user *ioc_buf)
1359{
1360 char *retbuf = NULL;
1361 unsigned int ret_data_len = 0;
1362 int rc;
1363 struct smb_snapshot_array snapshot_in;
1364
1365 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1366 cfile->fid.volatile_fid,
1367 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
63a83b86 1368 true /* is_fsctl */,
51146625 1369 NULL, 0 /* no input data */,
834170c8
SF		 1370 (char **)&retbuf,
1371 &ret_data_len);
1372 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1373 rc, ret_data_len);
1374 if (rc)
1375 return rc;
1376
1377 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
1378 /* Fixup buffer */
1379 if (copy_from_user(&snapshot_in, ioc_buf,
1380 sizeof(struct smb_snapshot_array))) {
1381 rc = -EFAULT;
1382 kfree(retbuf);
1383 return rc;
1384 }
1385 if (snapshot_in.snapshot_array_size < sizeof(struct smb_snapshot_array)) {
1386 rc = -ERANGE;
0e5c7955 1387 kfree(retbuf);
834170c8
SF		 1388 return rc;
1389 }
1390
1391 if (ret_data_len > snapshot_in.snapshot_array_size)
1392 ret_data_len = snapshot_in.snapshot_array_size;
1393
1394 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
1395 rc = -EFAULT;
1396 }
1397
1398 kfree(retbuf);
1399 return rc;
1400}
1401
d324f08d
PS		 1402static int
1403smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
1404 const char *path, struct cifs_sb_info *cifs_sb,
1405 struct cifs_fid *fid, __u16 search_flags,
1406 struct cifs_search_info *srch_inf)
1407{
1408 __le16 *utf16_path;
1409 int rc;
2e44b288 1410 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
064f6047 1411 struct cifs_open_parms oparms;
d324f08d
PS		 1412
1413 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1414 if (!utf16_path)
1415 return -ENOMEM;
1416
064f6047
PS		 1417 oparms.tcon = tcon;
1418 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
1419 oparms.disposition = FILE_OPEN;
1420 oparms.create_options = 0;
1421 oparms.fid = fid;
9cbc0b73 1422 oparms.reconnect = false;
064f6047 1423
9d874c36 1424 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
d324f08d
PS		 1425 kfree(utf16_path);
1426 if (rc) {
dcd87838 1427 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
d324f08d
PS		 1428 return rc;
1429 }
1430
1431 srch_inf->entries_in_buffer = 0;
1432 srch_inf->index_of_last_entry = 0;
d324f08d 1433
064f6047
PS		 1434 rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
1435 fid->volatile_fid, 0, srch_inf);
d324f08d 1436 if (rc) {
dcd87838 1437 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
064f6047 1438 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
d324f08d
PS		 1439 }
1440 return rc;
1441}
1442
1443static int
1444smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1445 struct cifs_fid *fid, __u16 search_flags,
1446 struct cifs_search_info *srch_inf)
1447{
1448 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1449 fid->volatile_fid, 0, srch_inf);
1450}
1451
1452static int
1453smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1454 struct cifs_fid *fid)
1455{
1456 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1457}
1458
2e44b288
PS		 1459/*
1460* If we negotiate SMB2 protocol and get STATUS_PENDING - update
1461* the number of credits and return true. Otherwise - return false.
1462*/
1463static bool
1464smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1465{
49f466bd 1466 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2e44b288 1467
31473fc4 1468 if (shdr->Status != STATUS_PENDING)
2e44b288
PS		 1469 return false;
1470
1471 if (!length) {
1472 spin_lock(&server->req_lock);
31473fc4 1473 server->credits += le16_to_cpu(shdr->CreditRequest);
2e44b288
PS		 1474 spin_unlock(&server->req_lock);
1475 wake_up(&server->request_q);
1476 }
1477
1478 return true;
1479}
1480
511c54a2
PS		 1481static bool
1482smb2_is_session_expired(char *buf)
1483{
49f466bd 1484 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
511c54a2 1485
d81243c6
MS		 1486 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
1487 shdr->Status != STATUS_USER_SESSION_DELETED)
511c54a2
PS		 1488 return false;
1489
d81243c6 1490 cifs_dbg(FYI, "Session expired or deleted\n");
511c54a2
PS		 1491 return true;
1492}
1493
983c88a4
PS		 1494static int
1495smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1496 struct cifsInodeInfo *cinode)
1497{
0822f514
PS		 1498 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1499 return SMB2_lease_break(0, tcon, cinode->lease_key,
1500 smb2_get_lease_state(cinode));
1501
983c88a4
PS		 1502 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1503 fid->volatile_fid,
18cceb6a 1504 CIFS_CACHE_READ(cinode) ? 1 : 0);
983c88a4
PS		 1505}
1506
6fc05c25
PS		 1507static int
1508smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1509 struct kstatfs *buf)
1510{
1511 int rc;
6fc05c25
PS		 1512 __le16 srch_path = 0; /* Null - open root of share */
1513 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
064f6047
PS		 1514 struct cifs_open_parms oparms;
1515 struct cifs_fid fid;
1516
1517 oparms.tcon = tcon;
1518 oparms.desired_access = FILE_READ_ATTRIBUTES;
1519 oparms.disposition = FILE_OPEN;
1520 oparms.create_options = 0;
1521 oparms.fid = &fid;
9cbc0b73 1522 oparms.reconnect = false;
6fc05c25 1523
9d874c36 1524 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
6fc05c25
PS		 1525 if (rc)
1526 return rc;
1527 buf->f_type = SMB2_MAGIC_NUMBER;
064f6047
PS		 1528 rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1529 buf);
1530 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
6fc05c25
PS		 1531 return rc;
1532}
1533
027e8eec
PS		 1534static bool
1535smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1536{
1537 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1538 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1539}
1540
f7ba7fe6
PS		 1541static int
1542smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1543 __u64 length, __u32 type, int lock, int unlock, bool wait)
1544{
1545 if (unlock && !lock)
1546 type = SMB2_LOCKFLAG_UNLOCK;
1547 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1548 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1549 current->tgid, length, offset, type, wait);
1550}
1551
b8c32dbb
PS		 1552static void
1553smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1554{
1555 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1556}
1557
1558static void
1559smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1560{
1561 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1562}
1563
1564static void
1565smb2_new_lease_key(struct cifs_fid *fid)
1566{
fa70b87c 1567 generate_random_uuid(fid->lease_key);
b8c32dbb
PS		 1568}
1569
9d49640a
AA		 1570static int
1571smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
1572 const char *search_name,
1573 struct dfs_info3_param **target_nodes,
1574 unsigned int *num_of_nodes,
1575 const struct nls_table *nls_codepage, int remap)
1576{
1577 int rc;
1578 __le16 *utf16_path = NULL;
1579 int utf16_path_len = 0;
1580 struct cifs_tcon *tcon;
1581 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
1582 struct get_dfs_referral_rsp *dfs_rsp = NULL;
1583 u32 dfs_req_size = 0, dfs_rsp_size = 0;
1584
1585 cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
1586
1587 /*
63a83b86 1588 * Try to use the IPC tcon, otherwise just use any
9d49640a 1589 */
63a83b86
AA		 1590 tcon = ses->tcon_ipc;
1591 if (tcon == NULL) {
1592 spin_lock(&cifs_tcp_ses_lock);
1593 tcon = list_first_entry_or_null(&ses->tcon_list,
1594 struct cifs_tcon,
1595 tcon_list);
1596 if (tcon)
1597 tcon->tc_count++;
1598 spin_unlock(&cifs_tcp_ses_lock);
1599 }
1600
1601 if (tcon == NULL) {
9d49640a
AA		 1602 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
1603 ses);
1604 rc = -ENOTCONN;
1605 goto out;
1606 }
1607
1608 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
1609 &utf16_path_len,
1610 nls_codepage, remap);
1611 if (!utf16_path) {
1612 rc = -ENOMEM;
1613 goto out;
1614 }
1615
1616 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
1617 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
1618 if (!dfs_req) {
1619 rc = -ENOMEM;
1620 goto out;
1621 }
1622
1623 /* Highest DFS referral version understood */
1624 dfs_req->MaxReferralLevel = DFS_VERSION;
1625
1626 /* Path to resolve in an UTF-16 null-terminated string */
1627 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
1628
1629 do {
9d49640a
AA		 1630 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1631 FSCTL_DFS_GET_REFERRALS,
63a83b86 1632 true /* is_fsctl */,
9d49640a
AA		 1633 (char *)dfs_req, dfs_req_size,
1634 (char **)&dfs_rsp, &dfs_rsp_size);
9d49640a
AA		 1635 } while (rc == -EAGAIN);
1636
1637 if (rc) {
2564f2ff 1638 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
5702591f 1639 cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
9d49640a
AA		 1640 goto out;
1641 }
1642
1643 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
1644 num_of_nodes, target_nodes,
1645 nls_codepage, remap, search_name,
1646 true /* is_unicode */);
1647 if (rc) {
1648 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
1649 goto out;
1650 }
1651
1652 out:
63a83b86
AA		 1653 if (tcon && !tcon->ipc) {
1654 /* ipc tcons are not refcounted */
9d49640a
AA		 1655 spin_lock(&cifs_tcp_ses_lock);
1656 tcon->tc_count--;
1657 spin_unlock(&cifs_tcp_ses_lock);
1658 }
1659 kfree(utf16_path);
1660 kfree(dfs_req);
1661 kfree(dfs_rsp);
1662 return rc;
1663}
7893242e
PS		 1664#define SMB2_SYMLINK_STRUCT_SIZE \
1665 (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1666
b42bf888
PS		 1667static int
1668smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1669 const char *full_path, char **target_path,
1670 struct cifs_sb_info *cifs_sb)
1671{
1672 int rc;
1673 __le16 *utf16_path;
1674 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1675 struct cifs_open_parms oparms;
1676 struct cifs_fid fid;
91cb74f5 1677 struct kvec err_iov = {NULL, 0};
9d874c36
RS		 1678 struct smb2_err_rsp *err_buf = NULL;
1679 int resp_buftype;
b42bf888 1680 struct smb2_symlink_err_rsp *symlink;
7893242e
PS		 1681 unsigned int sub_len;
1682 unsigned int sub_offset;
1683 unsigned int print_len;
1684 unsigned int print_offset;
b42bf888
PS		 1685
1686 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1687
1688 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1689 if (!utf16_path)
1690 return -ENOMEM;
1691
1692 oparms.tcon = tcon;
1693 oparms.desired_access = FILE_READ_ATTRIBUTES;
1694 oparms.disposition = FILE_OPEN;
1695 oparms.create_options = 0;
1696 oparms.fid = &fid;
1697 oparms.reconnect = false;
1698
9d874c36
RS		 1699 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_iov,
1700 &resp_buftype);
0d568cd3 1701 if (!rc || !err_iov.iov_base) {
9d874c36 1702 rc = -ENOENT;
ff361fda 1703 goto free_path;
b42bf888 1704 }
7893242e 1705
91cb74f5 1706 err_buf = err_iov.iov_base;
7893242e 1707 if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1fc6ad2f 1708 err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
9d874c36
RS		 1709 rc = -ENOENT;
1710 goto querty_exit;
7893242e
PS		 1711 }
1712
b42bf888
PS		 1713 /* open must fail on symlink - reset rc */
1714 rc = 0;
1715 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1716 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1717 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
7893242e
PS		 1718 print_len = le16_to_cpu(symlink->PrintNameLength);
1719 print_offset = le16_to_cpu(symlink->PrintNameOffset);
1720
1fc6ad2f 1721 if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
9d874c36
RS		 1722 rc = -ENOENT;
1723 goto querty_exit;
7893242e
PS		 1724 }
1725
1fc6ad2f
RS		 1726 if (err_iov.iov_len <
1727 SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
9d874c36
RS		 1728 rc = -ENOENT;
1729 goto querty_exit;
7893242e
PS		 1730 }
1731
b42bf888
PS		 1732 *target_path = cifs_strndup_from_utf16(
1733 (char *)symlink->PathBuffer + sub_offset,
1734 sub_len, true, cifs_sb->local_nls);
1735 if (!(*target_path)) {
9d874c36
RS		 1736 rc = -ENOMEM;
1737 goto querty_exit;
b42bf888
PS		 1738 }
1739 convert_delimiter(*target_path, '/');
1740 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
9d874c36
RS		 1741
1742 querty_exit:
1743 free_rsp_buf(resp_buftype, err_buf);
ff361fda 1744 free_path:
b42bf888
PS		 1745 kfree(utf16_path);
1746 return rc;
1747}
1748
84908426 1749#ifdef CONFIG_CIFS_ACL
2f1afe25
SP		 1750static struct cifs_ntsd *
1751get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
1752 const struct cifs_fid *cifsfid, u32 *pacllen)
1753{
1754 struct cifs_ntsd *pntsd = NULL;
1755 unsigned int xid;
1756 int rc = -EOPNOTSUPP;
1757 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1758
1759 if (IS_ERR(tlink))
1760 return ERR_CAST(tlink);
1761
1762 xid = get_xid();
1763 cifs_dbg(FYI, "trying to get acl\n");
1764
1765 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
1766 cifsfid->volatile_fid, (void **)&pntsd, pacllen);
1767 free_xid(xid);
1768
1769 cifs_put_tlink(tlink);
1770
1771 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1772 if (rc)
1773 return ERR_PTR(rc);
1774 return pntsd;
1775
1776}
1777
1778static struct cifs_ntsd *
1779get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
1780 const char *path, u32 *pacllen)
1781{
1782 struct cifs_ntsd *pntsd = NULL;
1783 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1784 unsigned int xid;
1785 int rc;
1786 struct cifs_tcon *tcon;
1787 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1788 struct cifs_fid fid;
1789 struct cifs_open_parms oparms;
1790 __le16 *utf16_path;
1791
1792 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
1793 if (IS_ERR(tlink))
1794 return ERR_CAST(tlink);
1795
1796 tcon = tlink_tcon(tlink);
1797 xid = get_xid();
1798
1799 if (backup_cred(cifs_sb))
709340a0 1800 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2f1afe25
SP		 1801 else
1802 oparms.create_options = 0;
1803
1804 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
cfe89091
SF		 1805 if (!utf16_path) {
1806 rc = -ENOMEM;
1807 free_xid(xid);
1808 return ERR_PTR(rc);
1809 }
2f1afe25
SP		 1810
1811 oparms.tcon = tcon;
1812 oparms.desired_access = READ_CONTROL;
1813 oparms.disposition = FILE_OPEN;
1814 oparms.fid = &fid;
1815 oparms.reconnect = false;
1816
9d874c36 1817 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2f1afe25
SP		 1818 kfree(utf16_path);
1819 if (!rc) {
1820 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1821 fid.volatile_fid, (void **)&pntsd, pacllen);
1822 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1823 }
1824
1825 cifs_put_tlink(tlink);
1826 free_xid(xid);
1827
1828 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1829 if (rc)
1830 return ERR_PTR(rc);
1831 return pntsd;
1832}
1833
366ed846
SP		 1834#ifdef CONFIG_CIFS_ACL
1835static int
1836set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
1837 struct inode *inode, const char *path, int aclflag)
1838{
1839 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1840 unsigned int xid;
1841 int rc, access_flags = 0;
1842 struct cifs_tcon *tcon;
1843 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1844 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1845 struct cifs_fid fid;
1846 struct cifs_open_parms oparms;
1847 __le16 *utf16_path;
1848
1849 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
1850 if (IS_ERR(tlink))
1851 return PTR_ERR(tlink);
1852
1853 tcon = tlink_tcon(tlink);
1854 xid = get_xid();
1855
1856 if (backup_cred(cifs_sb))
1857 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1858 else
1859 oparms.create_options = 0;
1860
1861 if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
1862 access_flags = WRITE_OWNER;
1863 else
1864 access_flags = WRITE_DAC;
1865
1866 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
cfe89091
SF		 1867 if (!utf16_path) {
1868 rc = -ENOMEM;
1869 free_xid(xid);
1870 return rc;
1871 }
366ed846
SP		 1872
1873 oparms.tcon = tcon;
1874 oparms.desired_access = access_flags;
1875 oparms.disposition = FILE_OPEN;
1876 oparms.path = path;
1877 oparms.fid = &fid;
1878 oparms.reconnect = false;
1879
9d874c36 1880 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
366ed846
SP		 1881 kfree(utf16_path);
1882 if (!rc) {
1883 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1884 fid.volatile_fid, pnntsd, acllen, aclflag);
1885 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1886 }
1887
1888 cifs_put_tlink(tlink);
1889 free_xid(xid);
1890 return rc;
1891}
1892#endif /* CIFS_ACL */
1893
2f1afe25
SP		 1894/* Retrieve an ACL from the server */
1895static struct cifs_ntsd *
1896get_smb2_acl(struct cifs_sb_info *cifs_sb,
1897 struct inode *inode, const char *path,
1898 u32 *pacllen)
1899{
1900 struct cifs_ntsd *pntsd = NULL;
1901 struct cifsFileInfo *open_file = NULL;
1902
1903 if (inode)
1904 open_file = find_readable_file(CIFS_I(inode), true);
1905 if (!open_file)
1906 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
1907
1908 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
1909 cifsFileInfo_put(open_file);
1910 return pntsd;
1911}
84908426 1912#endif
2f1afe25 1913
30175628
SF		 1914static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1915 loff_t offset, loff_t len, bool keep_size)
1916{
1917 struct inode *inode;
1918 struct cifsInodeInfo *cifsi;
1919 struct cifsFileInfo *cfile = file->private_data;
1920 struct file_zero_data_information fsctl_buf;
1921 long rc;
1922 unsigned int xid;
1923
1924 xid = get_xid();
1925
2b0143b5 1926 inode = d_inode(cfile->dentry);
30175628
SF		 1927 cifsi = CIFS_I(inode);
1928
1929 /* if file not oplocked can't be sure whether asking to extend size */
1930 if (!CIFS_CACHE_READ(cifsi))
cfe89091
SF		 1931 if (keep_size == false) {
1932 rc = -EOPNOTSUPP;
1933 free_xid(xid);
1934 return rc;
1935 }
30175628 1936
2bb93d24 1937 /*
30175628
SF		 1938 * Must check if file sparse since fallocate -z (zero range) assumes
1939 * non-sparse allocation
1940 */
cfe89091
SF		 1941 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
1942 rc = -EOPNOTSUPP;
1943 free_xid(xid);
1944 return rc;
1945 }
30175628
SF		 1946
1947 /*
1948 * need to make sure we are not asked to extend the file since the SMB3
1949 * fsctl does not change the file size. In the future we could change
1950 * this to zero the first part of the range then set the file size
1951 * which for a non sparse file would zero the newly extended range
1952 */
1953 if (keep_size == false)
cfe89091
SF		 1954 if (i_size_read(inode) < offset + len) {
1955 rc = -EOPNOTSUPP;
1956 free_xid(xid);
1957 return rc;
1958 }
30175628
SF		 1959
1960 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1961
1962 fsctl_buf.FileOffset = cpu_to_le64(offset);
1963 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1964
1965 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1966 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
63a83b86 1967 true /* is_fctl */, (char *)&fsctl_buf,
30175628
SF		 1968 sizeof(struct file_zero_data_information), NULL, NULL);
1969 free_xid(xid);
1970 return rc;
1971}
1972
31742c5a
SF		 1973static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1974 loff_t offset, loff_t len)
1975{
1976 struct inode *inode;
1977 struct cifsInodeInfo *cifsi;
1978 struct cifsFileInfo *cfile = file->private_data;
1979 struct file_zero_data_information fsctl_buf;
1980 long rc;
1981 unsigned int xid;
1982 __u8 set_sparse = 1;
1983
1984 xid = get_xid();
1985
2b0143b5 1986 inode = d_inode(cfile->dentry);
31742c5a
SF		 1987 cifsi = CIFS_I(inode);
1988
1989 /* Need to make file sparse, if not already, before freeing range. */
1990 /* Consider adding equivalent for compressed since it could also work */
cfe89091
SF		 1991 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
1992 rc = -EOPNOTSUPP;
1993 free_xid(xid);
1994 return rc;
1995 }
31742c5a
SF		 1996
1997 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1998
1999 fsctl_buf.FileOffset = cpu_to_le64(offset);
2000 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
2001
2002 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2003 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
63a83b86 2004 true /* is_fctl */, (char *)&fsctl_buf,
31742c5a
SF		 2005 sizeof(struct file_zero_data_information), NULL, NULL);
2006 free_xid(xid);
2007 return rc;
2008}
2009
9ccf3216
SF		 2010static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
2011 loff_t off, loff_t len, bool keep_size)
2012{
2013 struct inode *inode;
2014 struct cifsInodeInfo *cifsi;
2015 struct cifsFileInfo *cfile = file->private_data;
2016 long rc = -EOPNOTSUPP;
2017 unsigned int xid;
2018
2019 xid = get_xid();
2020
2b0143b5 2021 inode = d_inode(cfile->dentry);
9ccf3216
SF		 2022 cifsi = CIFS_I(inode);
2023
2024 /* if file not oplocked can't be sure whether asking to extend size */
2025 if (!CIFS_CACHE_READ(cifsi))
cfe89091
SF		 2026 if (keep_size == false) {
2027 free_xid(xid);
2028 return rc;
2029 }
9ccf3216
SF		 2030
2031 /*
2032 * Files are non-sparse by default so falloc may be a no-op
2033 * Must check if file sparse. If not sparse, and not extending
2034 * then no need to do anything since file already allocated
2035 */
2036 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
2037 if (keep_size == true)
cfe89091 2038 rc = 0;
9ccf3216
SF		 2039 /* check if extending file */
2040 else if (i_size_read(inode) >= off + len)
2041 /* not extending file and already not sparse */
cfe89091 2042 rc = 0;
9ccf3216
SF		 2043 /* BB: in future add else clause to extend file */
2044 else
cfe89091
SF		 2045 rc = -EOPNOTSUPP;
2046 free_xid(xid);
2047 return rc;
9ccf3216
SF		 2048 }
2049
2050 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
2051 /*
2052 * Check if falloc starts within first few pages of file
2053 * and ends within a few pages of the end of file to
2054 * ensure that most of file is being forced to be
2055 * fallocated now. If so then setting whole file sparse
2056 * ie potentially making a few extra pages at the beginning
2057 * or end of the file non-sparse via set_sparse is harmless.
2058 */
cfe89091
SF		 2059 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
2060 rc = -EOPNOTSUPP;
2061 free_xid(xid);
2062 return rc;
2063 }
9ccf3216
SF		 2064
2065 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
2066 }
2067 /* BB: else ... in future add code to extend file and set sparse */
2068
2069
2070 free_xid(xid);
2071 return rc;
2072}
2073
2074
31742c5a
SF		 2075static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
2076 loff_t off, loff_t len)
2077{
2078 /* KEEP_SIZE already checked for by do_fallocate */
2079 if (mode & FALLOC_FL_PUNCH_HOLE)
2080 return smb3_punch_hole(file, tcon, off, len);
30175628
SF		 2081 else if (mode & FALLOC_FL_ZERO_RANGE) {
2082 if (mode & FALLOC_FL_KEEP_SIZE)
2083 return smb3_zero_range(file, tcon, off, len, true);
2084 return smb3_zero_range(file, tcon, off, len, false);
9ccf3216
SF		 2085 } else if (mode == FALLOC_FL_KEEP_SIZE)
2086 return smb3_simple_falloc(file, tcon, off, len, true);
2087 else if (mode == 0)
2088 return smb3_simple_falloc(file, tcon, off, len, false);
31742c5a
SF		 2089
2090 return -EOPNOTSUPP;
2091}
2092
c11f1df5
SP		 2093static void
2094smb2_downgrade_oplock(struct TCP_Server_Info *server,
2095 struct cifsInodeInfo *cinode, bool set_level2)
2096{
2097 if (set_level2)
2098 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
2099 0, NULL);
2100 else
2101 server->ops->set_oplock_level(cinode, 0, 0, NULL);
2102}
2103
53ef1016 2104static void
42873b0a
PS		 2105smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2106 unsigned int epoch, bool *purge_cache)
53ef1016
PS		 2107{
2108 oplock &= 0xFF;
2109 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2110 return;
2111 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
42873b0a 2112 cinode->oplock = CIFS_CACHE_RHW_FLG;
53ef1016
PS		 2113 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
2114 &cinode->vfs_inode);
2115 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
42873b0a 2116 cinode->oplock = CIFS_CACHE_RW_FLG;
53ef1016
PS		 2117 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
2118 &cinode->vfs_inode);
2119 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
2120 cinode->oplock = CIFS_CACHE_READ_FLG;
2121 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
2122 &cinode->vfs_inode);
2123 } else
2124 cinode->oplock = 0;
2125}
2126
2127static void
42873b0a
PS		 2128smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2129 unsigned int epoch, bool *purge_cache)
53ef1016
PS		 2130{
2131 char message[5] = {0};
2132
2133 oplock &= 0xFF;
2134 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2135 return;
2136
2137 cinode->oplock = 0;
2138 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
2139 cinode->oplock |= CIFS_CACHE_READ_FLG;
2140 strcat(message, "R");
2141 }
2142 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
2143 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
2144 strcat(message, "H");
2145 }
2146 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
2147 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
2148 strcat(message, "W");
2149 }
2150 if (!cinode->oplock)
2151 strcat(message, "None");
2152 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
2153 &cinode->vfs_inode);
2154}
2155
42873b0a
PS		 2156static void
2157smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2158 unsigned int epoch, bool *purge_cache)
2159{
2160 unsigned int old_oplock = cinode->oplock;
2161
2162 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
2163
2164 if (purge_cache) {
2165 *purge_cache = false;
2166 if (old_oplock == CIFS_CACHE_READ_FLG) {
2167 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
2168 (epoch - cinode->epoch > 0))
2169 *purge_cache = true;
2170 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2171 (epoch - cinode->epoch > 1))
2172 *purge_cache = true;
2173 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2174 (epoch - cinode->epoch > 1))
2175 *purge_cache = true;
2176 else if (cinode->oplock == 0 &&
2177 (epoch - cinode->epoch > 0))
2178 *purge_cache = true;
2179 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
2180 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2181 (epoch - cinode->epoch > 0))
2182 *purge_cache = true;
2183 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2184 (epoch - cinode->epoch > 1))
2185 *purge_cache = true;
2186 }
2187 cinode->epoch = epoch;
2188 }
2189}
2190
53ef1016
PS		 2191static bool
2192smb2_is_read_op(__u32 oplock)
2193{
2194 return oplock == SMB2_OPLOCK_LEVEL_II;
2195}
2196
2197static bool
2198smb21_is_read_op(__u32 oplock)
2199{
2200 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
2201 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
2202}
2203
f047390a
PS		 2204static __le32
2205map_oplock_to_lease(u8 oplock)
2206{
2207 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
2208 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
2209 else if (oplock == SMB2_OPLOCK_LEVEL_II)
2210 return SMB2_LEASE_READ_CACHING;
2211 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
2212 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
2213 SMB2_LEASE_WRITE_CACHING;
2214 return 0;
2215}
2216
a41a28bd
PS		 2217static char *
2218smb2_create_lease_buf(u8 *lease_key, u8 oplock)
2219{
2220 struct create_lease *buf;
2221
2222 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
2223 if (!buf)
2224 return NULL;
2225
729c0c9d 2226 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
f047390a 2227 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
a41a28bd
PS		 2228
2229 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2230 (struct create_lease, lcontext));
2231 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
2232 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2233 (struct create_lease, Name));
2234 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 2235 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
a41a28bd
PS		 2236 buf->Name[0] = 'R';
2237 buf->Name[1] = 'q';
2238 buf->Name[2] = 'L';
2239 buf->Name[3] = 's';
2240 return (char *)buf;
2241}
2242
f047390a
PS		 2243static char *
2244smb3_create_lease_buf(u8 *lease_key, u8 oplock)
2245{
2246 struct create_lease_v2 *buf;
2247
2248 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
2249 if (!buf)
2250 return NULL;
2251
729c0c9d 2252 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
f047390a
PS		 2253 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2254
2255 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2256 (struct create_lease_v2, lcontext));
2257 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
2258 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2259 (struct create_lease_v2, Name));
2260 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 2261 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
f047390a
PS		 2262 buf->Name[0] = 'R';
2263 buf->Name[1] = 'q';
2264 buf->Name[2] = 'L';
2265 buf->Name[3] = 's';
2266 return (char *)buf;
2267}
2268
b5c7cde3 2269static __u8
96164ab2 2270smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
b5c7cde3
PS		 2271{
2272 struct create_lease *lc = (struct create_lease *)buf;
2273
42873b0a 2274 *epoch = 0; /* not used */
b5c7cde3
PS		 2275 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2276 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2277 return le32_to_cpu(lc->lcontext.LeaseState);
2278}
2279
f047390a 2280static __u8
96164ab2 2281smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
f047390a
PS		 2282{
2283 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
2284
42873b0a 2285 *epoch = le16_to_cpu(lc->lcontext.Epoch);
f047390a
PS		 2286 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2287 return SMB2_OPLOCK_LEVEL_NOCHANGE;
96164ab2 2288 if (lease_key)
729c0c9d 2289 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
f047390a
PS		 2290 return le32_to_cpu(lc->lcontext.LeaseState);
2291}
2292
7f6c5008
PS		 2293static unsigned int
2294smb2_wp_retry_size(struct inode *inode)
2295{
2296 return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
2297 SMB2_MAX_BUFFER_SIZE);
2298}
2299
52755808
PS		 2300static bool
2301smb2_dir_needs_close(struct cifsFileInfo *cfile)
2302{
2303 return !cfile->invalidHandle;
2304}
2305
026e93dc 2306static void
977b6170
RS		 2307fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
2308 struct smb_rqst *old_rq)
026e93dc
PS		 2309{
2310 struct smb2_sync_hdr *shdr =
c713c877 2311 (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
026e93dc
PS		 2312
2313 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
2314 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
2315 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
2316 tr_hdr->Flags = cpu_to_le16(0x01);
2317 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2318 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
026e93dc
PS		 2319}
2320
262916bc
RS		 2321/* We can not use the normal sg_set_buf() as we will sometimes pass a
2322 * stack object as buf.
2323 */
2324static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
2325 unsigned int buflen)
2326{
2327 sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
2328}
2329
977b6170 2330/* Assumes:
cd2dca60 2331 * rqst->rq_iov[0] is transform header
c713c877 2332 * rqst->rq_iov[1+] data to be encrypted/decrypted
977b6170 2333 */
026e93dc
PS		 2334static struct scatterlist *
2335init_sg(struct smb_rqst *rqst, u8 *sign)
2336{
c713c877 2337 unsigned int sg_len = rqst->rq_nvec + rqst->rq_npages + 1;
977b6170 2338 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
026e93dc
PS		 2339 struct scatterlist *sg;
2340 unsigned int i;
2341 unsigned int j;
2342
2343 sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
2344 if (!sg)
2345 return NULL;
2346
2347 sg_init_table(sg, sg_len);
c713c877
RS		 2348 smb2_sg_set_buf(&sg[0], rqst->rq_iov[0].iov_base + 20, assoc_data_len);
2349 for (i = 1; i < rqst->rq_nvec; i++)
2350 smb2_sg_set_buf(&sg[i], rqst->rq_iov[i].iov_base,
2351 rqst->rq_iov[i].iov_len);
026e93dc 2352 for (j = 0; i < sg_len - 1; i++, j++) {
d5f07fb3
SF		 2353 unsigned int len, offset;
2354
2355 rqst_page_get_length(rqst, j, &len, &offset);
2356 sg_set_page(&sg[i], rqst->rq_pages[j], len, offset);
026e93dc 2357 }
262916bc 2358 smb2_sg_set_buf(&sg[sg_len - 1], sign, SMB2_SIGNATURE_SIZE);
026e93dc
PS		 2359 return sg;
2360}
2361
61cfac6f
PS		 2362static int
2363smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
2364{
2365 struct cifs_ses *ses;
2366 u8 *ses_enc_key;
2367
2368 spin_lock(&cifs_tcp_ses_lock);
2369 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2370 if (ses->Suid != ses_id)
2371 continue;
2372 ses_enc_key = enc ? ses->smb3encryptionkey :
2373 ses->smb3decryptionkey;
2374 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
2375 spin_unlock(&cifs_tcp_ses_lock);
2376 return 0;
2377 }
2378 spin_unlock(&cifs_tcp_ses_lock);
2379
2380 return 1;
2381}
026e93dc 2382/*
c713c877
RS		 2383 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
2384 * iov[0] - transform header (associate data),
2385 * iov[1-N] - SMB2 header and pages - data to encrypt.
2386 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
026e93dc
PS		 2387 * untouched.
2388 */
2389static int
2390crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
2391{
2392 struct smb2_transform_hdr *tr_hdr =
cd2dca60 2393 (struct smb2_transform_hdr *)rqst->rq_iov[0].iov_base;
1fc6ad2f 2394 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
026e93dc
PS		 2395 int rc = 0;
2396 struct scatterlist *sg;
2397 u8 sign[SMB2_SIGNATURE_SIZE] = {};
61cfac6f 2398 u8 key[SMB3_SIGN_KEY_SIZE];
026e93dc
PS		 2399 struct aead_request *req;
2400 char *iv;
2401 unsigned int iv_len;
a5186b85 2402 DECLARE_CRYPTO_WAIT(wait);
026e93dc
PS		 2403 struct crypto_aead *tfm;
2404 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2405
61cfac6f
PS		 2406 rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
2407 if (rc) {
2408 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
2409 enc ? "en" : "de");
026e93dc
PS		 2410 return 0;
2411 }
2412
2413 rc = smb3_crypto_aead_allocate(server);
2414 if (rc) {
2415 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
2416 return rc;
2417 }
2418
2419 tfm = enc ? server->secmech.ccmaesencrypt :
2420 server->secmech.ccmaesdecrypt;
61cfac6f 2421 rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
026e93dc
PS		 2422 if (rc) {
2423 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
2424 return rc;
2425 }
2426
2427 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
2428 if (rc) {
2429 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
2430 return rc;
2431 }
2432
2433 req = aead_request_alloc(tfm, GFP_KERNEL);
2434 if (!req) {
2435 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
2436 return -ENOMEM;
2437 }
2438
2439 if (!enc) {
2440 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
2441 crypt_len += SMB2_SIGNATURE_SIZE;
2442 }
2443
2444 sg = init_sg(rqst, sign);
2445 if (!sg) {
517a6e43
CJ		 2446 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
2447 rc = -ENOMEM;
026e93dc
PS		 2448 goto free_req;
2449 }
2450
2451 iv_len = crypto_aead_ivsize(tfm);
2452 iv = kzalloc(iv_len, GFP_KERNEL);
2453 if (!iv) {
2454 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
517a6e43 2455 rc = -ENOMEM;
026e93dc
PS		 2456 goto free_sg;
2457 }
2458 iv[0] = 3;
2459 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2460
2461 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
2462 aead_request_set_ad(req, assoc_data_len);
2463
2464 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
a5186b85 2465 crypto_req_done, &wait);
026e93dc 2466
a5186b85
GBY		 2467 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
2468 : crypto_aead_decrypt(req), &wait);
026e93dc
PS		 2469
2470 if (!rc && enc)
2471 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
2472
2473 kfree(iv);
2474free_sg:
2475 kfree(sg);
2476free_req:
2477 kfree(req);
2478 return rc;
2479}
2480
2481static int
2482smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
2483 struct smb_rqst *old_rq)
2484{
2485 struct kvec *iov;
2486 struct page **pages;
2487 struct smb2_transform_hdr *tr_hdr;
2488 unsigned int npages = old_rq->rq_npages;
35e2cc1b 2489 unsigned int orig_len;
026e93dc
PS		 2490 int i;
2491 int rc = -ENOMEM;
2492
2493 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2494 if (!pages)
2495 return rc;
2496
2497 new_rq->rq_pages = pages;
d5f07fb3 2498 new_rq->rq_offset = old_rq->rq_offset;
026e93dc
PS		 2499 new_rq->rq_npages = old_rq->rq_npages;
2500 new_rq->rq_pagesz = old_rq->rq_pagesz;
2501 new_rq->rq_tailsz = old_rq->rq_tailsz;
2502
2503 for (i = 0; i < npages; i++) {
2504 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2505 if (!pages[i])
2506 goto err_free_pages;
2507 }
2508
977b6170
RS		 2509 iov = kmalloc_array(old_rq->rq_nvec + 1, sizeof(struct kvec),
2510 GFP_KERNEL);
026e93dc
PS		 2511 if (!iov)
2512 goto err_free_pages;
2513
c713c877
RS		 2514 /* copy all iovs from the old */
2515 memcpy(&iov[1], &old_rq->rq_iov[0],
2516 sizeof(struct kvec) * old_rq->rq_nvec);
977b6170 2517
026e93dc 2518 new_rq->rq_iov = iov;
977b6170 2519 new_rq->rq_nvec = old_rq->rq_nvec + 1;
026e93dc
PS		 2520
2521 tr_hdr = kmalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
2522 if (!tr_hdr)
2523 goto err_free_iov;
2524
81f39f95 2525 orig_len = smb_rqst_len(server, old_rq);
35e2cc1b 2526
977b6170
RS		 2527 /* fill the 2nd iov with a transform header */
2528 fill_transform_hdr(tr_hdr, orig_len, old_rq);
c713c877
RS		 2529 new_rq->rq_iov[0].iov_base = tr_hdr;
2530 new_rq->rq_iov[0].iov_len = sizeof(struct smb2_transform_hdr);
026e93dc
PS		 2531
2532 /* copy pages form the old */
2533 for (i = 0; i < npages; i++) {
d5f07fb3
SF		 2534 char *dst, *src;
2535 unsigned int offset, len;
2536
2537 rqst_page_get_length(new_rq, i, &len, &offset);
2538
2539 dst = (char *) kmap(new_rq->rq_pages[i]) + offset;
2540 src = (char *) kmap(old_rq->rq_pages[i]) + offset;
2541
026e93dc
PS		 2542 memcpy(dst, src, len);
2543 kunmap(new_rq->rq_pages[i]);
2544 kunmap(old_rq->rq_pages[i]);
2545 }
2546
2547 rc = crypt_message(server, new_rq, 1);
2548 cifs_dbg(FYI, "encrypt message returned %d", rc);
2549 if (rc)
2550 goto err_free_tr_hdr;
2551
2552 return rc;
2553
2554err_free_tr_hdr:
2555 kfree(tr_hdr);
2556err_free_iov:
2557 kfree(iov);
2558err_free_pages:
2559 for (i = i - 1; i >= 0; i--)
2560 put_page(pages[i]);
2561 kfree(pages);
2562 return rc;
2563}
2564
2565static void
2566smb3_free_transform_rq(struct smb_rqst *rqst)
2567{
2568 int i = rqst->rq_npages - 1;
2569
2570 for (; i >= 0; i--)
2571 put_page(rqst->rq_pages[i]);
2572 kfree(rqst->rq_pages);
2573 /* free transform header */
c713c877 2574 kfree(rqst->rq_iov[0].iov_base);
026e93dc
PS		 2575 kfree(rqst->rq_iov);
2576}
2577
4326ed2f
PS		 2578static int
2579smb3_is_transform_hdr(void *buf)
2580{
2581 struct smb2_transform_hdr *trhdr = buf;
2582
2583 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
2584}
2585
2586static int
2587decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
2588 unsigned int buf_data_size, struct page **pages,
2589 unsigned int npages, unsigned int page_data_size)
2590{
c713c877 2591 struct kvec iov[2];
4326ed2f 2592 struct smb_rqst rqst = {NULL};
4326ed2f
PS		 2593 int rc;
2594
c713c877
RS		 2595 iov[0].iov_base = buf;
2596 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2597 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
2598 iov[1].iov_len = buf_data_size;
4326ed2f
PS		 2599
2600 rqst.rq_iov = iov;
c713c877 2601 rqst.rq_nvec = 2;
4326ed2f
PS		 2602 rqst.rq_pages = pages;
2603 rqst.rq_npages = npages;
2604 rqst.rq_pagesz = PAGE_SIZE;
2605 rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
2606
2607 rc = crypt_message(server, &rqst, 0);
2608 cifs_dbg(FYI, "decrypt message returned %d\n", rc);
2609
2610 if (rc)
2611 return rc;
2612
c713c877 2613 memmove(buf, iov[1].iov_base, buf_data_size);
977b6170
RS		 2614
2615 server->total_read = buf_data_size + page_data_size;
4326ed2f
PS		 2616
2617 return rc;
2618}
2619
c42a6abe
PS		 2620static int
2621read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
2622 unsigned int npages, unsigned int len)
2623{
2624 int i;
2625 int length;
2626
2627 for (i = 0; i < npages; i++) {
2628 struct page *page = pages[i];
2629 size_t n;
2630
2631 n = len;
2632 if (len >= PAGE_SIZE) {
2633 /* enough data to fill the page */
2634 n = PAGE_SIZE;
2635 len -= n;
2636 } else {
2637 zero_user(page, len, PAGE_SIZE - len);
2638 len = 0;
2639 }
1dbe3466 2640 length = cifs_read_page_from_socket(server, page, 0, n);
c42a6abe
PS		 2641 if (length < 0)
2642 return length;
2643 server->total_read += length;
2644 }
2645
2646 return 0;
2647}
2648
2649static int
2650init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
2651 unsigned int cur_off, struct bio_vec **page_vec)
2652{
2653 struct bio_vec *bvec;
2654 int i;
2655
2656 bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
2657 if (!bvec)
2658 return -ENOMEM;
2659
2660 for (i = 0; i < npages; i++) {
2661 bvec[i].bv_page = pages[i];
2662 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
2663 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
2664 data_size -= bvec[i].bv_len;
2665 }
2666
2667 if (data_size != 0) {
2668 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
2669 kfree(bvec);
2670 return -EIO;
2671 }
2672
2673 *page_vec = bvec;
2674 return 0;
2675}
2676
4326ed2f
PS		 2677static int
2678handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
2679 char *buf, unsigned int buf_len, struct page **pages,
2680 unsigned int npages, unsigned int page_data_size)
2681{
2682 unsigned int data_offset;
2683 unsigned int data_len;
c42a6abe
PS		 2684 unsigned int cur_off;
2685 unsigned int cur_page_idx;
2686 unsigned int pad_len;
4326ed2f 2687 struct cifs_readdata *rdata = mid->callback_data;
49f466bd 2688 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
4326ed2f
PS		 2689 struct bio_vec *bvec = NULL;
2690 struct iov_iter iter;
2691 struct kvec iov;
2692 int length;
74dcf418 2693 bool use_rdma_mr = false;
4326ed2f
PS		 2694
2695 if (shdr->Command != SMB2_READ) {
2696 cifs_dbg(VFS, "only big read responses are supported\n");
2697 return -ENOTSUPP;
2698 }
2699
511c54a2
PS		 2700 if (server->ops->is_session_expired &&
2701 server->ops->is_session_expired(buf)) {
2702 cifs_reconnect(server);
2703 wake_up(&server->response_q);
2704 return -1;
2705 }
2706
4326ed2f
PS		 2707 if (server->ops->is_status_pending &&
2708 server->ops->is_status_pending(buf, server, 0))
2709 return -1;
2710
2711 rdata->result = server->ops->map_error(buf, false);
2712 if (rdata->result != 0) {
2713 cifs_dbg(FYI, "%s: server returned error %d\n",
2714 __func__, rdata->result);
2715 dequeue_mid(mid, rdata->result);
2716 return 0;
2717 }
2718
1fc6ad2f 2719 data_offset = server->ops->read_data_offset(buf);
74dcf418
LL		 2720#ifdef CONFIG_CIFS_SMB_DIRECT
2721 use_rdma_mr = rdata->mr;
2722#endif
2723 data_len = server->ops->read_data_length(buf, use_rdma_mr);
4326ed2f
PS		 2724
2725 if (data_offset < server->vals->read_rsp_size) {
2726 /*
2727 * win2k8 sometimes sends an offset of 0 when the read
2728 * is beyond the EOF. Treat it as if the data starts just after
2729 * the header.
2730 */
2731 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
2732 __func__, data_offset);
2733 data_offset = server->vals->read_rsp_size;
2734 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
2735 /* data_offset is beyond the end of smallbuf */
2736 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
2737 __func__, data_offset);
2738 rdata->result = -EIO;
2739 dequeue_mid(mid, rdata->result);
2740 return 0;
2741 }
2742
c42a6abe
PS		 2743 pad_len = data_offset - server->vals->read_rsp_size;
2744
4326ed2f
PS		 2745 if (buf_len <= data_offset) {
2746 /* read response payload is in pages */
c42a6abe
PS		 2747 cur_page_idx = pad_len / PAGE_SIZE;
2748 cur_off = pad_len % PAGE_SIZE;
2749
2750 if (cur_page_idx != 0) {
2751 /* data offset is beyond the 1st page of response */
2752 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
2753 __func__, data_offset);
2754 rdata->result = -EIO;
2755 dequeue_mid(mid, rdata->result);
2756 return 0;
2757 }
2758
2759 if (data_len > page_data_size - pad_len) {
2760 /* data_len is corrupt -- discard frame */
2761 rdata->result = -EIO;
2762 dequeue_mid(mid, rdata->result);
2763 return 0;
2764 }
2765
2766 rdata->result = init_read_bvec(pages, npages, page_data_size,
2767 cur_off, &bvec);
2768 if (rdata->result != 0) {
2769 dequeue_mid(mid, rdata->result);
2770 return 0;
2771 }
2772
2773 iov_iter_bvec(&iter, WRITE | ITER_BVEC, bvec, npages, data_len);
4326ed2f
PS		 2774 } else if (buf_len >= data_offset + data_len) {
2775 /* read response payload is in buf */
2776 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
2777 iov.iov_base = buf + data_offset;
2778 iov.iov_len = data_len;
2779 iov_iter_kvec(&iter, WRITE | ITER_KVEC, &iov, 1, data_len);
2780 } else {
2781 /* read response payload cannot be in both buf and pages */
2782 WARN_ONCE(1, "buf can not contain only a part of read data");
2783 rdata->result = -EIO;
2784 dequeue_mid(mid, rdata->result);
2785 return 0;
2786 }
2787
2788 /* set up first iov for signature check */
2789 rdata->iov[0].iov_base = buf;
2790 rdata->iov[0].iov_len = 4;
2791 rdata->iov[1].iov_base = buf + 4;
2792 rdata->iov[1].iov_len = server->vals->read_rsp_size - 4;
2793 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
2794 rdata->iov[0].iov_base, server->vals->read_rsp_size);
2795
2796 length = rdata->copy_into_pages(server, rdata, &iter);
2797
2798 kfree(bvec);
2799
2800 if (length < 0)
2801 return length;
2802
2803 dequeue_mid(mid, false);
2804 return length;
2805}
2806
c42a6abe
PS		 2807static int
2808receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2809{
2810 char *buf = server->smallbuf;
2811 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2812 unsigned int npages;
2813 struct page **pages;
2814 unsigned int len;
1fc6ad2f 2815 unsigned int buflen = server->pdu_size;
c42a6abe
PS		 2816 int rc;
2817 int i = 0;
2818
1fc6ad2f 2819 len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
c42a6abe
PS		 2820 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
2821
2822 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
2823 if (rc < 0)
2824 return rc;
2825 server->total_read += rc;
2826
1fc6ad2f 2827 len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
93012bf9 2828 server->vals->read_rsp_size;
c42a6abe
PS		 2829 npages = DIV_ROUND_UP(len, PAGE_SIZE);
2830
2831 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2832 if (!pages) {
2833 rc = -ENOMEM;
2834 goto discard_data;
2835 }
2836
2837 for (; i < npages; i++) {
2838 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2839 if (!pages[i]) {
2840 rc = -ENOMEM;
2841 goto discard_data;
2842 }
2843 }
2844
2845 /* read read data into pages */
2846 rc = read_data_into_pages(server, pages, npages, len);
2847 if (rc)
2848 goto free_pages;
2849
350be257 2850 rc = cifs_discard_remaining_data(server);
c42a6abe
PS		 2851 if (rc)
2852 goto free_pages;
2853
1fc6ad2f 2854 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
c42a6abe
PS		 2855 pages, npages, len);
2856 if (rc)
2857 goto free_pages;
2858
2859 *mid = smb2_find_mid(server, buf);
2860 if (*mid == NULL)
2861 cifs_dbg(FYI, "mid not found\n");
2862 else {
2863 cifs_dbg(FYI, "mid found\n");
2864 (*mid)->decrypted = true;
2865 rc = handle_read_data(server, *mid, buf,
2866 server->vals->read_rsp_size,
2867 pages, npages, len);
2868 }
2869
2870free_pages:
2871 for (i = i - 1; i >= 0; i--)
2872 put_page(pages[i]);
2873 kfree(pages);
2874 return rc;
2875discard_data:
350be257 2876 cifs_discard_remaining_data(server);
c42a6abe
PS		 2877 goto free_pages;
2878}
2879
4326ed2f
PS		 2880static int
2881receive_encrypted_standard(struct TCP_Server_Info *server,
2882 struct mid_q_entry **mid)
2883{
2884 int length;
2885 char *buf = server->smallbuf;
2e96467d 2886 unsigned int pdu_length = server->pdu_size;
4326ed2f
PS		 2887 unsigned int buf_size;
2888 struct mid_q_entry *mid_entry;
2889
2890 /* switch to large buffer if too big for a small one */
1fc6ad2f 2891 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4326ed2f
PS		 2892 server->large_buf = true;
2893 memcpy(server->bigbuf, buf, server->total_read);
2894 buf = server->bigbuf;
2895 }
2896
2897 /* now read the rest */
2898 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
1fc6ad2f 2899 pdu_length - HEADER_SIZE(server) + 1);
4326ed2f
PS		 2900 if (length < 0)
2901 return length;
2902 server->total_read += length;
2903
1fc6ad2f 2904 buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4326ed2f
PS		 2905 length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
2906 if (length)
2907 return length;
2908
2909 mid_entry = smb2_find_mid(server, buf);
2910 if (mid_entry == NULL)
2911 cifs_dbg(FYI, "mid not found\n");
2912 else {
2913 cifs_dbg(FYI, "mid found\n");
2914 mid_entry->decrypted = true;
2915 }
2916
2917 *mid = mid_entry;
2918
2919 if (mid_entry && mid_entry->handle)
2920 return mid_entry->handle(server, mid_entry);
2921
2922 return cifs_handle_standard(server, mid_entry);
2923}
2924
2925static int
2926smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2927{
2928 char *buf = server->smallbuf;
2e96467d 2929 unsigned int pdu_length = server->pdu_size;
4326ed2f
PS		 2930 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2931 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2932
1fc6ad2f 2933 if (pdu_length < sizeof(struct smb2_transform_hdr) +
4326ed2f
PS		 2934 sizeof(struct smb2_sync_hdr)) {
2935 cifs_dbg(VFS, "Transform message is too small (%u)\n",
2936 pdu_length);
2937 cifs_reconnect(server);
2938 wake_up(&server->response_q);
2939 return -ECONNABORTED;
2940 }
2941
1fc6ad2f 2942 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4326ed2f
PS		 2943 cifs_dbg(VFS, "Transform message is broken\n");
2944 cifs_reconnect(server);
2945 wake_up(&server->response_q);
2946 return -ECONNABORTED;
2947 }
2948
1fc6ad2f 2949 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
c42a6abe 2950 return receive_encrypted_read(server, mid);
4326ed2f
PS		 2951
2952 return receive_encrypted_standard(server, mid);
2953}
2954
2955int
2956smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
2957{
2958 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
2959
1fc6ad2f 2960 return handle_read_data(server, mid, buf, server->pdu_size,
4326ed2f
PS		 2961 NULL, 0, 0);
2962}
2963
8ce79ec3
RS		 2964static int
2965smb2_next_header(char *buf)
2966{
2967 struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
2968 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
2969
2970 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
2971 return sizeof(struct smb2_transform_hdr) +
2972 le32_to_cpu(t_hdr->OriginalMessageSize);
2973
2974 return le32_to_cpu(hdr->NextCommand);
2975}
2976
53ef1016 2977struct smb_version_operations smb20_operations = {
027e8eec 2978 .compare_fids = smb2_compare_fids,
2dc7e1c0 2979 .setup_request = smb2_setup_request,
c95b8eed 2980 .setup_async_request = smb2_setup_async_request,
2dc7e1c0 2981 .check_receive = smb2_check_receive,
28ea5290
PS		 2982 .add_credits = smb2_add_credits,
2983 .set_credits = smb2_set_credits,
2984 .get_credits_field = smb2_get_credits_field,
2985 .get_credits = smb2_get_credits,
cb7e9eab 2986 .wait_mtu_credits = cifs_wait_mtu_credits,
2dc7e1c0 2987 .get_next_mid = smb2_get_next_mid,
09a4707e
PS		 2988 .read_data_offset = smb2_read_data_offset,
2989 .read_data_length = smb2_read_data_length,
2990 .map_error = map_smb2_to_linux_error,
093b2bda
PS		 2991 .find_mid = smb2_find_mid,
2992 .check_message = smb2_check_message,
2993 .dump_detail = smb2_dump_detail,
d60622eb
PS		 2994 .clear_stats = smb2_clear_stats,
2995 .print_stats = smb2_print_stats,
983c88a4 2996 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 2997 .handle_cancelled_mid = smb2_handle_cancelled_mid,
c11f1df5 2998 .downgrade_oplock = smb2_downgrade_oplock,
ec2e4523
PS		 2999 .need_neg = smb2_need_neg,
3000 .negotiate = smb2_negotiate,
3a3bab50
PS		 3001 .negotiate_wsize = smb2_negotiate_wsize,
3002 .negotiate_rsize = smb2_negotiate_rsize,
5478f9ba
PS		 3003 .sess_setup = SMB2_sess_setup,
3004 .logoff = SMB2_logoff,
faaf946a
PS		 3005 .tree_connect = SMB2_tcon,
3006 .tree_disconnect = SMB2_tdis,
34f62640 3007 .qfs_tcon = smb2_qfs_tcon,
2503a0db 3008 .is_path_accessible = smb2_is_path_accessible,
9094fad1
PS		 3009 .can_echo = smb2_can_echo,
3010 .echo = SMB2_echo,
be4cb9e3
PS		 3011 .query_path_info = smb2_query_path_info,
3012 .get_srv_inum = smb2_get_srv_inum,
b7546bc5 3013 .query_file_info = smb2_query_file_info,
c839ff24
PS		 3014 .set_path_size = smb2_set_path_size,
3015 .set_file_size = smb2_set_file_size,
1feeaac7 3016 .set_file_info = smb2_set_file_info,
64a5cfa6 3017 .set_compression = smb2_set_compression,
a0e73183
PS		 3018 .mkdir = smb2_mkdir,
3019 .mkdir_setinfo = smb2_mkdir_setinfo,
1a500f01 3020 .rmdir = smb2_rmdir,
cbe6f439 3021 .unlink = smb2_unlink,
35143eb5 3022 .rename = smb2_rename_path,
568798cc 3023 .create_hardlink = smb2_create_hardlink,
b42bf888 3024 .query_symlink = smb2_query_symlink,
5b23c97d
SP		 3025 .query_mf_symlink = smb3_query_mf_symlink,
3026 .create_mf_symlink = smb3_create_mf_symlink,
f0df737e
PS		 3027 .open = smb2_open_file,
3028 .set_fid = smb2_set_fid,
3029 .close = smb2_close_file,
7a5cfb19 3030 .flush = smb2_flush_file,
09a4707e 3031 .async_readv = smb2_async_readv,
33319141 3032 .async_writev = smb2_async_writev,
d8e05039 3033 .sync_read = smb2_sync_read,
009d3443 3034 .sync_write = smb2_sync_write,
d324f08d
PS		 3035 .query_dir_first = smb2_query_dir_first,
3036 .query_dir_next = smb2_query_dir_next,
3037 .close_dir = smb2_close_dir,
3038 .calc_smb_size = smb2_calc_size,
2e44b288 3039 .is_status_pending = smb2_is_status_pending,
511c54a2 3040 .is_session_expired = smb2_is_session_expired,
983c88a4 3041 .oplock_response = smb2_oplock_response,
6fc05c25 3042 .queryfs = smb2_queryfs,
f7ba7fe6
PS		 3043 .mand_lock = smb2_mand_lock,
3044 .mand_unlock_range = smb2_unlock_range,
b140799a 3045 .push_mand_locks = smb2_push_mandatory_locks,
b8c32dbb
PS		 3046 .get_lease_key = smb2_get_lease_key,
3047 .set_lease_key = smb2_set_lease_key,
3048 .new_lease_key = smb2_new_lease_key,
38107d45 3049 .calc_signature = smb2_calc_signature,
53ef1016
PS		 3050 .is_read_op = smb2_is_read_op,
3051 .set_oplock_level = smb2_set_oplock_level,
a41a28bd 3052 .create_lease_buf = smb2_create_lease_buf,
b5c7cde3 3053 .parse_lease_buf = smb2_parse_lease_buf,
312bbc59 3054 .copychunk_range = smb2_copychunk_range,
7f6c5008 3055 .wp_retry_size = smb2_wp_retry_size,
52755808 3056 .dir_needs_close = smb2_dir_needs_close,
9d49640a 3057 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 3058 .select_sectype = smb2_select_sectype,
95907fea
RS		 3059#ifdef CONFIG_CIFS_XATTR
3060 .query_all_EAs = smb2_query_eas,
5517554e 3061 .set_EA = smb2_set_ea,
95907fea 3062#endif /* CIFS_XATTR */
2f1afe25
SP		 3063#ifdef CONFIG_CIFS_ACL
3064 .get_acl = get_smb2_acl,
3065 .get_acl_by_fid = get_smb2_acl_by_fid,
366ed846 3066 .set_acl = set_smb2_acl,
2f1afe25 3067#endif /* CIFS_ACL */
8ce79ec3 3068 .next_header = smb2_next_header,
38107d45
SF		 3069};
3070
53ef1016
PS		 3071struct smb_version_operations smb21_operations = {
3072 .compare_fids = smb2_compare_fids,
3073 .setup_request = smb2_setup_request,
3074 .setup_async_request = smb2_setup_async_request,
3075 .check_receive = smb2_check_receive,
3076 .add_credits = smb2_add_credits,
3077 .set_credits = smb2_set_credits,
3078 .get_credits_field = smb2_get_credits_field,
3079 .get_credits = smb2_get_credits,
cb7e9eab 3080 .wait_mtu_credits = smb2_wait_mtu_credits,
53ef1016
PS		 3081 .get_next_mid = smb2_get_next_mid,
3082 .read_data_offset = smb2_read_data_offset,
3083 .read_data_length = smb2_read_data_length,
3084 .map_error = map_smb2_to_linux_error,
3085 .find_mid = smb2_find_mid,
3086 .check_message = smb2_check_message,
3087 .dump_detail = smb2_dump_detail,
3088 .clear_stats = smb2_clear_stats,
3089 .print_stats = smb2_print_stats,
3090 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 3091 .handle_cancelled_mid = smb2_handle_cancelled_mid,
c11f1df5 3092 .downgrade_oplock = smb2_downgrade_oplock,
53ef1016
PS		 3093 .need_neg = smb2_need_neg,
3094 .negotiate = smb2_negotiate,
3095 .negotiate_wsize = smb2_negotiate_wsize,
3096 .negotiate_rsize = smb2_negotiate_rsize,
3097 .sess_setup = SMB2_sess_setup,
3098 .logoff = SMB2_logoff,
3099 .tree_connect = SMB2_tcon,
3100 .tree_disconnect = SMB2_tdis,
34f62640 3101 .qfs_tcon = smb2_qfs_tcon,
53ef1016
PS		 3102 .is_path_accessible = smb2_is_path_accessible,
3103 .can_echo = smb2_can_echo,
3104 .echo = SMB2_echo,
3105 .query_path_info = smb2_query_path_info,
3106 .get_srv_inum = smb2_get_srv_inum,
3107 .query_file_info = smb2_query_file_info,
3108 .set_path_size = smb2_set_path_size,
3109 .set_file_size = smb2_set_file_size,
3110 .set_file_info = smb2_set_file_info,
64a5cfa6 3111 .set_compression = smb2_set_compression,
53ef1016
PS		 3112 .mkdir = smb2_mkdir,
3113 .mkdir_setinfo = smb2_mkdir_setinfo,
3114 .rmdir = smb2_rmdir,
3115 .unlink = smb2_unlink,
3116 .rename = smb2_rename_path,
3117 .create_hardlink = smb2_create_hardlink,
3118 .query_symlink = smb2_query_symlink,
c22870ea 3119 .query_mf_symlink = smb3_query_mf_symlink,
5ab97578 3120 .create_mf_symlink = smb3_create_mf_symlink,
53ef1016
PS		 3121 .open = smb2_open_file,
3122 .set_fid = smb2_set_fid,
3123 .close = smb2_close_file,
3124 .flush = smb2_flush_file,
3125 .async_readv = smb2_async_readv,
3126 .async_writev = smb2_async_writev,
3127 .sync_read = smb2_sync_read,
3128 .sync_write = smb2_sync_write,
3129 .query_dir_first = smb2_query_dir_first,
3130 .query_dir_next = smb2_query_dir_next,
3131 .close_dir = smb2_close_dir,
3132 .calc_smb_size = smb2_calc_size,
3133 .is_status_pending = smb2_is_status_pending,
511c54a2 3134 .is_session_expired = smb2_is_session_expired,
53ef1016
PS		 3135 .oplock_response = smb2_oplock_response,
3136 .queryfs = smb2_queryfs,
3137 .mand_lock = smb2_mand_lock,
3138 .mand_unlock_range = smb2_unlock_range,
3139 .push_mand_locks = smb2_push_mandatory_locks,
3140 .get_lease_key = smb2_get_lease_key,
3141 .set_lease_key = smb2_set_lease_key,
3142 .new_lease_key = smb2_new_lease_key,
3143 .calc_signature = smb2_calc_signature,
3144 .is_read_op = smb21_is_read_op,
3145 .set_oplock_level = smb21_set_oplock_level,
a41a28bd 3146 .create_lease_buf = smb2_create_lease_buf,
b5c7cde3 3147 .parse_lease_buf = smb2_parse_lease_buf,
312bbc59 3148 .copychunk_range = smb2_copychunk_range,
7f6c5008 3149 .wp_retry_size = smb2_wp_retry_size,
52755808 3150 .dir_needs_close = smb2_dir_needs_close,
834170c8 3151 .enum_snapshots = smb3_enum_snapshots,
9d49640a 3152 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 3153 .select_sectype = smb2_select_sectype,
95907fea
RS		 3154#ifdef CONFIG_CIFS_XATTR
3155 .query_all_EAs = smb2_query_eas,
5517554e 3156 .set_EA = smb2_set_ea,
95907fea 3157#endif /* CIFS_XATTR */
2f1afe25
SP		 3158#ifdef CONFIG_CIFS_ACL
3159 .get_acl = get_smb2_acl,
3160 .get_acl_by_fid = get_smb2_acl_by_fid,
366ed846 3161 .set_acl = set_smb2_acl,
2f1afe25 3162#endif /* CIFS_ACL */
8ce79ec3 3163 .next_header = smb2_next_header,
53ef1016 3164};
38107d45
SF		 3165
3166struct smb_version_operations smb30_operations = {
3167 .compare_fids = smb2_compare_fids,
3168 .setup_request = smb2_setup_request,
3169 .setup_async_request = smb2_setup_async_request,
3170 .check_receive = smb2_check_receive,
3171 .add_credits = smb2_add_credits,
3172 .set_credits = smb2_set_credits,
3173 .get_credits_field = smb2_get_credits_field,
3174 .get_credits = smb2_get_credits,
cb7e9eab 3175 .wait_mtu_credits = smb2_wait_mtu_credits,
38107d45
SF		 3176 .get_next_mid = smb2_get_next_mid,
3177 .read_data_offset = smb2_read_data_offset,
3178 .read_data_length = smb2_read_data_length,
3179 .map_error = map_smb2_to_linux_error,
3180 .find_mid = smb2_find_mid,
3181 .check_message = smb2_check_message,
3182 .dump_detail = smb2_dump_detail,
3183 .clear_stats = smb2_clear_stats,
3184 .print_stats = smb2_print_stats,
769ee6a4 3185 .dump_share_caps = smb2_dump_share_caps,
38107d45 3186 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 3187 .handle_cancelled_mid = smb2_handle_cancelled_mid,
c11f1df5 3188 .downgrade_oplock = smb2_downgrade_oplock,
38107d45
SF		 3189 .need_neg = smb2_need_neg,
3190 .negotiate = smb2_negotiate,
3191 .negotiate_wsize = smb2_negotiate_wsize,
3192 .negotiate_rsize = smb2_negotiate_rsize,
3193 .sess_setup = SMB2_sess_setup,
3194 .logoff = SMB2_logoff,
3195 .tree_connect = SMB2_tcon,
3196 .tree_disconnect = SMB2_tdis,
af6a12ea 3197 .qfs_tcon = smb3_qfs_tcon,
38107d45
SF		 3198 .is_path_accessible = smb2_is_path_accessible,
3199 .can_echo = smb2_can_echo,
3200 .echo = SMB2_echo,
3201 .query_path_info = smb2_query_path_info,
3202 .get_srv_inum = smb2_get_srv_inum,
3203 .query_file_info = smb2_query_file_info,
3204 .set_path_size = smb2_set_path_size,
3205 .set_file_size = smb2_set_file_size,
3206 .set_file_info = smb2_set_file_info,
64a5cfa6 3207 .set_compression = smb2_set_compression,
38107d45
SF		 3208 .mkdir = smb2_mkdir,
3209 .mkdir_setinfo = smb2_mkdir_setinfo,
3210 .rmdir = smb2_rmdir,
3211 .unlink = smb2_unlink,
3212 .rename = smb2_rename_path,
3213 .create_hardlink = smb2_create_hardlink,
b42bf888 3214 .query_symlink = smb2_query_symlink,
c22870ea 3215 .query_mf_symlink = smb3_query_mf_symlink,
5ab97578 3216 .create_mf_symlink = smb3_create_mf_symlink,
38107d45
SF		 3217 .open = smb2_open_file,
3218 .set_fid = smb2_set_fid,
3219 .close = smb2_close_file,
3220 .flush = smb2_flush_file,
3221 .async_readv = smb2_async_readv,
3222 .async_writev = smb2_async_writev,
3223 .sync_read = smb2_sync_read,
3224 .sync_write = smb2_sync_write,
3225 .query_dir_first = smb2_query_dir_first,
3226 .query_dir_next = smb2_query_dir_next,
3227 .close_dir = smb2_close_dir,
3228 .calc_smb_size = smb2_calc_size,
3229 .is_status_pending = smb2_is_status_pending,
511c54a2 3230 .is_session_expired = smb2_is_session_expired,
38107d45
SF		 3231 .oplock_response = smb2_oplock_response,
3232 .queryfs = smb2_queryfs,
3233 .mand_lock = smb2_mand_lock,
3234 .mand_unlock_range = smb2_unlock_range,
3235 .push_mand_locks = smb2_push_mandatory_locks,
3236 .get_lease_key = smb2_get_lease_key,
3237 .set_lease_key = smb2_set_lease_key,
3238 .new_lease_key = smb2_new_lease_key,
373512ec 3239 .generate_signingkey = generate_smb30signingkey,
38107d45 3240 .calc_signature = smb3_calc_signature,
b3152e2c 3241 .set_integrity = smb3_set_integrity,
53ef1016 3242 .is_read_op = smb21_is_read_op,
42873b0a 3243 .set_oplock_level = smb3_set_oplock_level,
f047390a
PS		 3244 .create_lease_buf = smb3_create_lease_buf,
3245 .parse_lease_buf = smb3_parse_lease_buf,
312bbc59 3246 .copychunk_range = smb2_copychunk_range,
ca9e7a1c 3247 .duplicate_extents = smb2_duplicate_extents,
ff1c038a 3248 .validate_negotiate = smb3_validate_negotiate,
7f6c5008 3249 .wp_retry_size = smb2_wp_retry_size,
52755808 3250 .dir_needs_close = smb2_dir_needs_close,
31742c5a 3251 .fallocate = smb3_fallocate,
834170c8 3252 .enum_snapshots = smb3_enum_snapshots,
026e93dc
PS		 3253 .init_transform_rq = smb3_init_transform_rq,
3254 .free_transform_rq = smb3_free_transform_rq,
4326ed2f
PS		 3255 .is_transform_hdr = smb3_is_transform_hdr,
3256 .receive_transform = smb3_receive_transform,
9d49640a 3257 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 3258 .select_sectype = smb2_select_sectype,
95907fea
RS		 3259#ifdef CONFIG_CIFS_XATTR
3260 .query_all_EAs = smb2_query_eas,
5517554e 3261 .set_EA = smb2_set_ea,
95907fea 3262#endif /* CIFS_XATTR */
2f1afe25
SP		 3263#ifdef CONFIG_CIFS_ACL
3264 .get_acl = get_smb2_acl,
3265 .get_acl_by_fid = get_smb2_acl_by_fid,
366ed846 3266 .set_acl = set_smb2_acl,
2f1afe25 3267#endif /* CIFS_ACL */
8ce79ec3 3268 .next_header = smb2_next_header,
1080ef75
SF		 3269};
3270
aab1893d
SF		 3271#ifdef CONFIG_CIFS_SMB311
3272struct smb_version_operations smb311_operations = {
3273 .compare_fids = smb2_compare_fids,
3274 .setup_request = smb2_setup_request,
3275 .setup_async_request = smb2_setup_async_request,
3276 .check_receive = smb2_check_receive,
3277 .add_credits = smb2_add_credits,
3278 .set_credits = smb2_set_credits,
3279 .get_credits_field = smb2_get_credits_field,
3280 .get_credits = smb2_get_credits,
3281 .wait_mtu_credits = smb2_wait_mtu_credits,
3282 .get_next_mid = smb2_get_next_mid,
3283 .read_data_offset = smb2_read_data_offset,
3284 .read_data_length = smb2_read_data_length,
3285 .map_error = map_smb2_to_linux_error,
3286 .find_mid = smb2_find_mid,
3287 .check_message = smb2_check_message,
3288 .dump_detail = smb2_dump_detail,
3289 .clear_stats = smb2_clear_stats,
3290 .print_stats = smb2_print_stats,
3291 .dump_share_caps = smb2_dump_share_caps,
3292 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 3293 .handle_cancelled_mid = smb2_handle_cancelled_mid,
aab1893d
SF		 3294 .downgrade_oplock = smb2_downgrade_oplock,
3295 .need_neg = smb2_need_neg,
3296 .negotiate = smb2_negotiate,
3297 .negotiate_wsize = smb2_negotiate_wsize,
3298 .negotiate_rsize = smb2_negotiate_rsize,
3299 .sess_setup = SMB2_sess_setup,
3300 .logoff = SMB2_logoff,
3301 .tree_connect = SMB2_tcon,
3302 .tree_disconnect = SMB2_tdis,
3303 .qfs_tcon = smb3_qfs_tcon,
3304 .is_path_accessible = smb2_is_path_accessible,
3305 .can_echo = smb2_can_echo,
3306 .echo = SMB2_echo,
3307 .query_path_info = smb2_query_path_info,
3308 .get_srv_inum = smb2_get_srv_inum,
3309 .query_file_info = smb2_query_file_info,
3310 .set_path_size = smb2_set_path_size,
3311 .set_file_size = smb2_set_file_size,
3312 .set_file_info = smb2_set_file_info,
3313 .set_compression = smb2_set_compression,
3314 .mkdir = smb2_mkdir,
3315 .mkdir_setinfo = smb2_mkdir_setinfo,
bea851b8 3316 .posix_mkdir = smb311_posix_mkdir,
aab1893d
SF		 3317 .rmdir = smb2_rmdir,
3318 .unlink = smb2_unlink,
3319 .rename = smb2_rename_path,
3320 .create_hardlink = smb2_create_hardlink,
3321 .query_symlink = smb2_query_symlink,
3322 .query_mf_symlink = smb3_query_mf_symlink,
3323 .create_mf_symlink = smb3_create_mf_symlink,
3324 .open = smb2_open_file,
3325 .set_fid = smb2_set_fid,
3326 .close = smb2_close_file,
3327 .flush = smb2_flush_file,
3328 .async_readv = smb2_async_readv,
3329 .async_writev = smb2_async_writev,
3330 .sync_read = smb2_sync_read,
3331 .sync_write = smb2_sync_write,
3332 .query_dir_first = smb2_query_dir_first,
3333 .query_dir_next = smb2_query_dir_next,
3334 .close_dir = smb2_close_dir,
3335 .calc_smb_size = smb2_calc_size,
3336 .is_status_pending = smb2_is_status_pending,
511c54a2 3337 .is_session_expired = smb2_is_session_expired,
aab1893d
SF		 3338 .oplock_response = smb2_oplock_response,
3339 .queryfs = smb2_queryfs,
3340 .mand_lock = smb2_mand_lock,
3341 .mand_unlock_range = smb2_unlock_range,
3342 .push_mand_locks = smb2_push_mandatory_locks,
3343 .get_lease_key = smb2_get_lease_key,
3344 .set_lease_key = smb2_set_lease_key,
3345 .new_lease_key = smb2_new_lease_key,
373512ec 3346 .generate_signingkey = generate_smb311signingkey,
aab1893d 3347 .calc_signature = smb3_calc_signature,
b3152e2c 3348 .set_integrity = smb3_set_integrity,
aab1893d
SF		 3349 .is_read_op = smb21_is_read_op,
3350 .set_oplock_level = smb3_set_oplock_level,
3351 .create_lease_buf = smb3_create_lease_buf,
3352 .parse_lease_buf = smb3_parse_lease_buf,
312bbc59 3353 .copychunk_range = smb2_copychunk_range,
02b16665 3354 .duplicate_extents = smb2_duplicate_extents,
aab1893d
SF		 3355/* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
3356 .wp_retry_size = smb2_wp_retry_size,
3357 .dir_needs_close = smb2_dir_needs_close,
3358 .fallocate = smb3_fallocate,
834170c8 3359 .enum_snapshots = smb3_enum_snapshots,
026e93dc
PS		 3360 .init_transform_rq = smb3_init_transform_rq,
3361 .free_transform_rq = smb3_free_transform_rq,
4326ed2f
PS		 3362 .is_transform_hdr = smb3_is_transform_hdr,
3363 .receive_transform = smb3_receive_transform,
9d49640a 3364 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 3365 .select_sectype = smb2_select_sectype,
95907fea
RS		 3366#ifdef CONFIG_CIFS_XATTR
3367 .query_all_EAs = smb2_query_eas,
5517554e 3368 .set_EA = smb2_set_ea,
95907fea 3369#endif /* CIFS_XATTR */
8ce79ec3 3370 .next_header = smb2_next_header,
aab1893d
SF		 3371};
3372#endif /* CIFS_SMB311 */
3373
dd446b16
SF		 3374struct smb_version_values smb20_values = {
3375 .version_string = SMB20_VERSION_STRING,
3376 .protocol_id = SMB20_PROT_ID,
3377 .req_capabilities = 0, /* MBZ */
3378 .large_lock_type = 0,
3379 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3380 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3381 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3382 .header_size = sizeof(struct smb2_sync_hdr),
3383 .header_preamble_size = 0,
dd446b16
SF		 3384 .max_header_size = MAX_SMB2_HDR_SIZE,
3385 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3386 .lock_cmd = SMB2_LOCK,
3387 .cap_unix = 0,
3388 .cap_nt_find = SMB2_NT_FIND,
3389 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 3390 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3391 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
a41a28bd 3392 .create_lease_size = sizeof(struct create_lease),
dd446b16
SF		 3393};
3394
1080ef75
SF		 3395struct smb_version_values smb21_values = {
3396 .version_string = SMB21_VERSION_STRING,
e4aa25e7
SF		 3397 .protocol_id = SMB21_PROT_ID,
3398 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
3399 .large_lock_type = 0,
3400 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3401 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3402 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3403 .header_size = sizeof(struct smb2_sync_hdr),
3404 .header_preamble_size = 0,
e4aa25e7
SF		 3405 .max_header_size = MAX_SMB2_HDR_SIZE,
3406 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3407 .lock_cmd = SMB2_LOCK,
3408 .cap_unix = 0,
3409 .cap_nt_find = SMB2_NT_FIND,
3410 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 3411 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3412 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
a41a28bd 3413 .create_lease_size = sizeof(struct create_lease),
e4aa25e7
SF		 3414};
3415
9764c02f
SF		 3416struct smb_version_values smb3any_values = {
3417 .version_string = SMB3ANY_VERSION_STRING,
3418 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3419 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3420 .large_lock_type = 0,
3421 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3422 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3423 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3424 .header_size = sizeof(struct smb2_sync_hdr),
3425 .header_preamble_size = 0,
9764c02f
SF		 3426 .max_header_size = MAX_SMB2_HDR_SIZE,
3427 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3428 .lock_cmd = SMB2_LOCK,
3429 .cap_unix = 0,
3430 .cap_nt_find = SMB2_NT_FIND,
3431 .cap_large_files = SMB2_LARGE_FILES,
3432 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3433 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3434 .create_lease_size = sizeof(struct create_lease_v2),
3435};
3436
3437struct smb_version_values smbdefault_values = {
3438 .version_string = SMBDEFAULT_VERSION_STRING,
3439 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3440 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3441 .large_lock_type = 0,
3442 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3443 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3444 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3445 .header_size = sizeof(struct smb2_sync_hdr),
3446 .header_preamble_size = 0,
9764c02f
SF		 3447 .max_header_size = MAX_SMB2_HDR_SIZE,
3448 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3449 .lock_cmd = SMB2_LOCK,
3450 .cap_unix = 0,
3451 .cap_nt_find = SMB2_NT_FIND,
3452 .cap_large_files = SMB2_LARGE_FILES,
3453 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3454 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3455 .create_lease_size = sizeof(struct create_lease_v2),
3456};
3457
e4aa25e7
SF		 3458struct smb_version_values smb30_values = {
3459 .version_string = SMB30_VERSION_STRING,
3460 .protocol_id = SMB30_PROT_ID,
373512ec 3461 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
027e8eec
PS		 3462 .large_lock_type = 0,
3463 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3464 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3465 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3466 .header_size = sizeof(struct smb2_sync_hdr),
3467 .header_preamble_size = 0,
093b2bda 3468 .max_header_size = MAX_SMB2_HDR_SIZE,
09a4707e 3469 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2dc7e1c0 3470 .lock_cmd = SMB2_LOCK,
29e20f9c
PS		 3471 .cap_unix = 0,
3472 .cap_nt_find = SMB2_NT_FIND,
3473 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 3474 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3475 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
f047390a 3476 .create_lease_size = sizeof(struct create_lease_v2),
1080ef75 3477};
20b6d8b4
SF		 3478
3479struct smb_version_values smb302_values = {
3480 .version_string = SMB302_VERSION_STRING,
3481 .protocol_id = SMB302_PROT_ID,
373512ec 3482 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
20b6d8b4
SF		 3483 .large_lock_type = 0,
3484 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3485 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3486 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3487 .header_size = sizeof(struct smb2_sync_hdr),
3488 .header_preamble_size = 0,
20b6d8b4
SF		 3489 .max_header_size = MAX_SMB2_HDR_SIZE,
3490 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3491 .lock_cmd = SMB2_LOCK,
3492 .cap_unix = 0,
3493 .cap_nt_find = SMB2_NT_FIND,
3494 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 3495 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3496 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
f047390a 3497 .create_lease_size = sizeof(struct create_lease_v2),
20b6d8b4 3498};
5f7fbf73
SF		 3499
3500#ifdef CONFIG_CIFS_SMB311
3501struct smb_version_values smb311_values = {
3502 .version_string = SMB311_VERSION_STRING,
3503 .protocol_id = SMB311_PROT_ID,
1955880b 3504 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
5f7fbf73
SF		 3505 .large_lock_type = 0,
3506 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3507 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3508 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3509 .header_size = sizeof(struct smb2_sync_hdr),
3510 .header_preamble_size = 0,
5f7fbf73
SF		 3511 .max_header_size = MAX_SMB2_HDR_SIZE,
3512 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3513 .lock_cmd = SMB2_LOCK,
3514 .cap_unix = 0,
3515 .cap_nt_find = SMB2_NT_FIND,
3516 .cap_large_files = SMB2_LARGE_FILES,
3517 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3518 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3519 .create_lease_size = sizeof(struct create_lease_v2),
3520};
3521#endif /* SMB311 */
Linux 6.x block layer and io_uring tree(s)