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cifs: update receive_encrypted_standard to handle compounded responses
[thirdparty/linux.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);
c3ed4402
SF		 447 if (rc == -EOPNOTSUPP) {
448 cifs_dbg(FYI,
449 "server does not support query network interfaces\n");
450 goto out;
451 } else if (rc != 0) {
9ffc5412 452 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
fe856be4 453 goto out;
9ffc5412 454 }
fe856be4
AA		 455
456 rc = parse_server_interfaces(out_buf, ret_data_len,
457 &iface_list, &iface_count);
458 if (rc)
459 goto out;
460
461 spin_lock(&ses->iface_lock);
462 kfree(ses->iface_list);
463 ses->iface_list = iface_list;
464 ses->iface_count = iface_count;
465 ses->iface_last_update = jiffies;
466 spin_unlock(&ses->iface_lock);
467
468out:
24df1483 469 kfree(out_buf);
c481e9fe
SF		 470 return rc;
471}
c481e9fe 472
9da6ec77
RS		 473static void
474smb2_close_cached_fid(struct kref *ref)
a93864d9 475{
9da6ec77
RS		 476 struct cached_fid *cfid = container_of(ref, struct cached_fid,
477 refcount);
478
a93864d9
RS		 479 if (cfid->is_valid) {
480 cifs_dbg(FYI, "clear cached root file handle\n");
481 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
482 cfid->fid->volatile_fid);
483 cfid->is_valid = false;
484 }
9da6ec77
RS		 485}
486
487void close_shroot(struct cached_fid *cfid)
488{
489 mutex_lock(&cfid->fid_mutex);
490 kref_put(&cfid->refcount, smb2_close_cached_fid);
a93864d9
RS		 491 mutex_unlock(&cfid->fid_mutex);
492}
493
9da6ec77
RS		 494void
495smb2_cached_lease_break(struct work_struct *work)
496{
497 struct cached_fid *cfid = container_of(work,
498 struct cached_fid, lease_break);
499
500 close_shroot(cfid);
501}
502
3d4ef9a1
SF		 503/*
504 * Open the directory at the root of a share
505 */
506int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
507{
508 struct cifs_open_parms oparams;
509 int rc;
510 __le16 srch_path = 0; /* Null - since an open of top of share */
a93864d9 511 u8 oplock = SMB2_OPLOCK_LEVEL_II;
3d4ef9a1 512
a93864d9
RS		 513 mutex_lock(&tcon->crfid.fid_mutex);
514 if (tcon->crfid.is_valid) {
3d4ef9a1 515 cifs_dbg(FYI, "found a cached root file handle\n");
a93864d9 516 memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
9da6ec77 517 kref_get(&tcon->crfid.refcount);
a93864d9 518 mutex_unlock(&tcon->crfid.fid_mutex);
3d4ef9a1
SF		 519 return 0;
520 }
521
522 oparams.tcon = tcon;
523 oparams.create_options = 0;
524 oparams.desired_access = FILE_READ_ATTRIBUTES;
525 oparams.disposition = FILE_OPEN;
526 oparams.fid = pfid;
527 oparams.reconnect = false;
528
9d874c36 529 rc = SMB2_open(xid, &oparams, &srch_path, &oplock, NULL, NULL, NULL);
3d4ef9a1 530 if (rc == 0) {
a93864d9
RS		 531 memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
532 tcon->crfid.tcon = tcon;
533 tcon->crfid.is_valid = true;
9da6ec77
RS		 534 kref_init(&tcon->crfid.refcount);
535 kref_get(&tcon->crfid.refcount);
3d4ef9a1 536 }
a93864d9 537 mutex_unlock(&tcon->crfid.fid_mutex);
3d4ef9a1
SF		 538 return rc;
539}
540
af6a12ea
SF		 541static void
542smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
543{
544 int rc;
545 __le16 srch_path = 0; /* Null - open root of share */
546 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
547 struct cifs_open_parms oparms;
548 struct cifs_fid fid;
3d4ef9a1 549 bool no_cached_open = tcon->nohandlecache;
af6a12ea
SF		 550
551 oparms.tcon = tcon;
552 oparms.desired_access = FILE_READ_ATTRIBUTES;
553 oparms.disposition = FILE_OPEN;
554 oparms.create_options = 0;
555 oparms.fid = &fid;
556 oparms.reconnect = false;
557
3d4ef9a1 558 if (no_cached_open)
9d874c36
RS		 559 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
560 NULL);
3d4ef9a1
SF		 561 else
562 rc = open_shroot(xid, tcon, &fid);
563
af6a12ea
SF		 564 if (rc)
565 return;
566
c481e9fe 567 SMB3_request_interfaces(xid, tcon);
c481e9fe 568
af6a12ea
SF		 569 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
570 FS_ATTRIBUTE_INFORMATION);
571 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
572 FS_DEVICE_INFORMATION);
21ba3845
SF		 573 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
574 FS_VOLUME_INFORMATION);
af6a12ea
SF		 575 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
576 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
3d4ef9a1
SF		 577 if (no_cached_open)
578 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
9da6ec77
RS		 579 else
580 close_shroot(&tcon->crfid);
581
af6a12ea
SF		 582 return;
583}
584
34f62640
SF		 585static void
586smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
587{
588 int rc;
589 __le16 srch_path = 0; /* Null - open root of share */
590 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
591 struct cifs_open_parms oparms;
592 struct cifs_fid fid;
593
594 oparms.tcon = tcon;
595 oparms.desired_access = FILE_READ_ATTRIBUTES;
596 oparms.disposition = FILE_OPEN;
597 oparms.create_options = 0;
598 oparms.fid = &fid;
599 oparms.reconnect = false;
600
9d874c36 601 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
34f62640
SF		 602 if (rc)
603 return;
604
2167114c
SF		 605 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
606 FS_ATTRIBUTE_INFORMATION);
607 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
608 FS_DEVICE_INFORMATION);
34f62640
SF		 609 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
610 return;
611}
612
2503a0db
PS		 613static int
614smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
615 struct cifs_sb_info *cifs_sb, const char *full_path)
616{
617 int rc;
2503a0db 618 __le16 *utf16_path;
2e44b288 619 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
064f6047
PS		 620 struct cifs_open_parms oparms;
621 struct cifs_fid fid;
2503a0db 622
a93864d9 623 if ((*full_path == 0) && tcon->crfid.is_valid)
3d4ef9a1
SF		 624 return 0;
625
2503a0db
PS		 626 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
627 if (!utf16_path)
628 return -ENOMEM;
629
064f6047
PS		 630 oparms.tcon = tcon;
631 oparms.desired_access = FILE_READ_ATTRIBUTES;
632 oparms.disposition = FILE_OPEN;
633 oparms.create_options = 0;
634 oparms.fid = &fid;
9cbc0b73 635 oparms.reconnect = false;
064f6047 636
9d874c36 637 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2503a0db
PS		 638 if (rc) {
639 kfree(utf16_path);
640 return rc;
641 }
642
064f6047 643 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2503a0db
PS		 644 kfree(utf16_path);
645 return rc;
646}
647
be4cb9e3
PS		 648static int
649smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
650 struct cifs_sb_info *cifs_sb, const char *full_path,
651 u64 *uniqueid, FILE_ALL_INFO *data)
652{
653 *uniqueid = le64_to_cpu(data->IndexNumber);
654 return 0;
655}
656
b7546bc5
PS		 657static int
658smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
659 struct cifs_fid *fid, FILE_ALL_INFO *data)
660{
661 int rc;
662 struct smb2_file_all_info *smb2_data;
663
1bbe4997 664 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
b7546bc5
PS		 665 GFP_KERNEL);
666 if (smb2_data == NULL)
667 return -ENOMEM;
668
669 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
670 smb2_data);
671 if (!rc)
672 move_smb2_info_to_cifs(data, smb2_data);
673 kfree(smb2_data);
674 return rc;
675}
676
1368f155 677#ifdef CONFIG_CIFS_XATTR
95907fea
RS		 678static ssize_t
679move_smb2_ea_to_cifs(char *dst, size_t dst_size,
680 struct smb2_file_full_ea_info *src, size_t src_size,
681 const unsigned char *ea_name)
682{
683 int rc = 0;
684 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
685 char *name, *value;
686 size_t name_len, value_len, user_name_len;
687
688 while (src_size > 0) {
689 name = &src->ea_data[0];
690 name_len = (size_t)src->ea_name_length;
691 value = &src->ea_data[src->ea_name_length + 1];
692 value_len = (size_t)le16_to_cpu(src->ea_value_length);
693
694 if (name_len == 0) {
695 break;
696 }
697
698 if (src_size < 8 + name_len + 1 + value_len) {
699 cifs_dbg(FYI, "EA entry goes beyond length of list\n");
700 rc = -EIO;
701 goto out;
702 }
703
704 if (ea_name) {
705 if (ea_name_len == name_len &&
706 memcmp(ea_name, name, name_len) == 0) {
707 rc = value_len;
708 if (dst_size == 0)
709 goto out;
710 if (dst_size < value_len) {
711 rc = -ERANGE;
712 goto out;
713 }
714 memcpy(dst, value, value_len);
715 goto out;
716 }
717 } else {
718 /* 'user.' plus a terminating null */
719 user_name_len = 5 + 1 + name_len;
720
721 rc += user_name_len;
722
723 if (dst_size >= user_name_len) {
724 dst_size -= user_name_len;
725 memcpy(dst, "user.", 5);
726 dst += 5;
727 memcpy(dst, src->ea_data, name_len);
728 dst += name_len;
729 *dst = 0;
730 ++dst;
731 } else if (dst_size == 0) {
732 /* skip copy - calc size only */
733 } else {
734 /* stop before overrun buffer */
735 rc = -ERANGE;
736 break;
737 }
738 }
739
740 if (!src->next_entry_offset)
741 break;
742
743 if (src_size < le32_to_cpu(src->next_entry_offset)) {
744 /* stop before overrun buffer */
745 rc = -ERANGE;
746 break;
747 }
748 src_size -= le32_to_cpu(src->next_entry_offset);
749 src = (void *)((char *)src +
750 le32_to_cpu(src->next_entry_offset));
751 }
752
753 /* didn't find the named attribute */
754 if (ea_name)
755 rc = -ENODATA;
756
757out:
758 return (ssize_t)rc;
759}
760
761static ssize_t
762smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
763 const unsigned char *path, const unsigned char *ea_name,
764 char *ea_data, size_t buf_size,
765 struct cifs_sb_info *cifs_sb)
766{
767 int rc;
768 __le16 *utf16_path;
769 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
770 struct cifs_open_parms oparms;
771 struct cifs_fid fid;
772 struct smb2_file_full_ea_info *smb2_data;
7cb3def4 773 int ea_buf_size = SMB2_MIN_EA_BUF;
95907fea
RS		 774
775 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
776 if (!utf16_path)
777 return -ENOMEM;
778
779 oparms.tcon = tcon;
780 oparms.desired_access = FILE_READ_EA;
781 oparms.disposition = FILE_OPEN;
782 oparms.create_options = 0;
783 oparms.fid = &fid;
784 oparms.reconnect = false;
785
9d874c36 786 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
95907fea
RS		 787 kfree(utf16_path);
788 if (rc) {
789 cifs_dbg(FYI, "open failed rc=%d\n", rc);
790 return rc;
791 }
792
7cb3def4
RS		 793 while (1) {
794 smb2_data = kzalloc(ea_buf_size, GFP_KERNEL);
795 if (smb2_data == NULL) {
796 SMB2_close(xid, tcon, fid.persistent_fid,
797 fid.volatile_fid);
798 return -ENOMEM;
799 }
800
801 rc = SMB2_query_eas(xid, tcon, fid.persistent_fid,
802 fid.volatile_fid,
803 ea_buf_size, smb2_data);
804
805 if (rc != -E2BIG)
806 break;
807
808 kfree(smb2_data);
809 ea_buf_size <<= 1;
810
811 if (ea_buf_size > SMB2_MAX_EA_BUF) {
812 cifs_dbg(VFS, "EA size is too large\n");
813 SMB2_close(xid, tcon, fid.persistent_fid,
814 fid.volatile_fid);
815 return -ENOMEM;
816 }
95907fea
RS		 817 }
818
95907fea
RS		 819 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
820
ae2cd7fb
PA		 821 /*
822 * If ea_name is NULL (listxattr) and there are no EAs, return 0 as it's
823 * not an error. Otherwise, the specified ea_name was not found.
824 */
95907fea
RS		 825 if (!rc)
826 rc = move_smb2_ea_to_cifs(ea_data, buf_size, smb2_data,
827 SMB2_MAX_EA_BUF, ea_name);
ae2cd7fb
PA		 828 else if (!ea_name && rc == -ENODATA)
829 rc = 0;
95907fea
RS		 830
831 kfree(smb2_data);
832 return rc;
833}
834
5517554e
RS		 835
836static int
837smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
838 const char *path, const char *ea_name, const void *ea_value,
839 const __u16 ea_value_len, const struct nls_table *nls_codepage,
840 struct cifs_sb_info *cifs_sb)
841{
842 int rc;
843 __le16 *utf16_path;
844 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
845 struct cifs_open_parms oparms;
846 struct cifs_fid fid;
847 struct smb2_file_full_ea_info *ea;
848 int ea_name_len = strlen(ea_name);
849 int len;
850
851 if (ea_name_len > 255)
852 return -EINVAL;
853
854 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
855 if (!utf16_path)
856 return -ENOMEM;
857
858 oparms.tcon = tcon;
859 oparms.desired_access = FILE_WRITE_EA;
860 oparms.disposition = FILE_OPEN;
861 oparms.create_options = 0;
862 oparms.fid = &fid;
863 oparms.reconnect = false;
864
9d874c36 865 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
5517554e
RS		 866 kfree(utf16_path);
867 if (rc) {
868 cifs_dbg(FYI, "open failed rc=%d\n", rc);
869 return rc;
870 }
871
872 len = sizeof(ea) + ea_name_len + ea_value_len + 1;
873 ea = kzalloc(len, GFP_KERNEL);
874 if (ea == NULL) {
875 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
876 return -ENOMEM;
877 }
878
879 ea->ea_name_length = ea_name_len;
880 ea->ea_value_length = cpu_to_le16(ea_value_len);
881 memcpy(ea->ea_data, ea_name, ea_name_len + 1);
882 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
883
884 rc = SMB2_set_ea(xid, tcon, fid.persistent_fid, fid.volatile_fid, ea,
885 len);
6aa0c114
PA		 886 kfree(ea);
887
5517554e
RS		 888 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
889
890 return rc;
891}
1368f155 892#endif
5517554e 893
9094fad1
PS		 894static bool
895smb2_can_echo(struct TCP_Server_Info *server)
896{
897 return server->echoes;
898}
899
d60622eb
PS		 900static void
901smb2_clear_stats(struct cifs_tcon *tcon)
902{
d60622eb
PS		 903 int i;
904 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
905 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
906 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
907 }
d60622eb
PS		 908}
909
769ee6a4
SF		 910static void
911smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
912{
913 seq_puts(m, "\n\tShare Capabilities:");
914 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
915 seq_puts(m, " DFS,");
916 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
917 seq_puts(m, " CONTINUOUS AVAILABILITY,");
918 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
919 seq_puts(m, " SCALEOUT,");
920 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
921 seq_puts(m, " CLUSTER,");
922 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
923 seq_puts(m, " ASYMMETRIC,");
924 if (tcon->capabilities == 0)
925 seq_puts(m, " None");
af6a12ea
SF		 926 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
927 seq_puts(m, " Aligned,");
928 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
929 seq_puts(m, " Partition Aligned,");
930 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
931 seq_puts(m, " SSD,");
932 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
933 seq_puts(m, " TRIM-support,");
934
769ee6a4 935 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
e0386e44 936 seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
af6a12ea
SF		 937 if (tcon->perf_sector_size)
938 seq_printf(m, "\tOptimal sector size: 0x%x",
939 tcon->perf_sector_size);
e0386e44 940 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
769ee6a4
SF		 941}
942
d60622eb
PS		 943static void
944smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
945{
d60622eb
PS		 946 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
947 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1995d28f
SF		 948
949 /*
950 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
951 * totals (requests sent) since those SMBs are per-session not per tcon
952 */
52ce1ac4
SF		 953 seq_printf(m, "\nBytes read: %llu Bytes written: %llu",
954 (long long)(tcon->bytes_read),
955 (long long)(tcon->bytes_written));
1995d28f 956 seq_printf(m, "\nTreeConnects: %d total %d failed",
d60622eb
PS		 957 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
958 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1995d28f 959 seq_printf(m, "\nTreeDisconnects: %d total %d failed",
d60622eb
PS		 960 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
961 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1995d28f 962 seq_printf(m, "\nCreates: %d total %d failed",
d60622eb
PS		 963 atomic_read(&sent[SMB2_CREATE_HE]),
964 atomic_read(&failed[SMB2_CREATE_HE]));
1995d28f 965 seq_printf(m, "\nCloses: %d total %d failed",
d60622eb
PS		 966 atomic_read(&sent[SMB2_CLOSE_HE]),
967 atomic_read(&failed[SMB2_CLOSE_HE]));
1995d28f 968 seq_printf(m, "\nFlushes: %d total %d failed",
d60622eb
PS		 969 atomic_read(&sent[SMB2_FLUSH_HE]),
970 atomic_read(&failed[SMB2_FLUSH_HE]));
1995d28f 971 seq_printf(m, "\nReads: %d total %d failed",
d60622eb
PS		 972 atomic_read(&sent[SMB2_READ_HE]),
973 atomic_read(&failed[SMB2_READ_HE]));
1995d28f 974 seq_printf(m, "\nWrites: %d total %d failed",
d60622eb
PS		 975 atomic_read(&sent[SMB2_WRITE_HE]),
976 atomic_read(&failed[SMB2_WRITE_HE]));
1995d28f 977 seq_printf(m, "\nLocks: %d total %d failed",
d60622eb
PS		 978 atomic_read(&sent[SMB2_LOCK_HE]),
979 atomic_read(&failed[SMB2_LOCK_HE]));
1995d28f 980 seq_printf(m, "\nIOCTLs: %d total %d failed",
d60622eb
PS		 981 atomic_read(&sent[SMB2_IOCTL_HE]),
982 atomic_read(&failed[SMB2_IOCTL_HE]));
1995d28f 983 seq_printf(m, "\nQueryDirectories: %d total %d failed",
d60622eb
PS		 984 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
985 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1995d28f 986 seq_printf(m, "\nChangeNotifies: %d total %d failed",
d60622eb
PS		 987 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
988 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1995d28f 989 seq_printf(m, "\nQueryInfos: %d total %d failed",
d60622eb
PS		 990 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
991 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1995d28f 992 seq_printf(m, "\nSetInfos: %d total %d failed",
d60622eb
PS		 993 atomic_read(&sent[SMB2_SET_INFO_HE]),
994 atomic_read(&failed[SMB2_SET_INFO_HE]));
995 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
996 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
997 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
d60622eb
PS		 998}
999
f0df737e
PS		 1000static void
1001smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1002{
2b0143b5 1003 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
53ef1016
PS		 1004 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1005
f0df737e
PS		 1006 cfile->fid.persistent_fid = fid->persistent_fid;
1007 cfile->fid.volatile_fid = fid->volatile_fid;
42873b0a
PS		 1008 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1009 &fid->purge_cache);
18cceb6a 1010 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
94f87371 1011 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
f0df737e
PS		 1012}
1013
760ad0ca 1014static void
f0df737e
PS		 1015smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1016 struct cifs_fid *fid)
1017{
760ad0ca 1018 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
f0df737e
PS		 1019}
1020
41c1358e
SF		 1021static int
1022SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1023 u64 persistent_fid, u64 volatile_fid,
1024 struct copychunk_ioctl *pcchunk)
1025{
1026 int rc;
1027 unsigned int ret_data_len;
1028 struct resume_key_req *res_key;
1029
1030 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1031 FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1032 NULL, 0 /* no input */,
1033 (char **)&res_key, &ret_data_len);
1034
1035 if (rc) {
1036 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1037 goto req_res_key_exit;
1038 }
1039 if (ret_data_len < sizeof(struct resume_key_req)) {
1040 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
1041 rc = -EINVAL;
1042 goto req_res_key_exit;
1043 }
1044 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1045
1046req_res_key_exit:
1047 kfree(res_key);
1048 return rc;
1049}
1050
620d8745 1051static ssize_t
312bbc59 1052smb2_copychunk_range(const unsigned int xid,
41c1358e
SF		 1053 struct cifsFileInfo *srcfile,
1054 struct cifsFileInfo *trgtfile, u64 src_off,
1055 u64 len, u64 dest_off)
1056{
1057 int rc;
1058 unsigned int ret_data_len;
1059 struct copychunk_ioctl *pcchunk;
9bf0c9cd
SF		 1060 struct copychunk_ioctl_rsp *retbuf = NULL;
1061 struct cifs_tcon *tcon;
1062 int chunks_copied = 0;
1063 bool chunk_sizes_updated = false;
620d8745 1064 ssize_t bytes_written, total_bytes_written = 0;
41c1358e
SF		 1065
1066 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1067
1068 if (pcchunk == NULL)
1069 return -ENOMEM;
1070
312bbc59 1071 cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
41c1358e
SF		 1072 /* Request a key from the server to identify the source of the copy */
1073 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1074 srcfile->fid.persistent_fid,
1075 srcfile->fid.volatile_fid, pcchunk);
1076
1077 /* Note: request_res_key sets res_key null only if rc !=0 */
1078 if (rc)
9bf0c9cd 1079 goto cchunk_out;
41c1358e
SF		 1080
1081 /* For now array only one chunk long, will make more flexible later */
bc09d141 1082 pcchunk->ChunkCount = cpu_to_le32(1);
41c1358e 1083 pcchunk->Reserved = 0;
41c1358e
SF		 1084 pcchunk->Reserved2 = 0;
1085
9bf0c9cd 1086 tcon = tlink_tcon(trgtfile->tlink);
41c1358e 1087
9bf0c9cd
SF		 1088 while (len > 0) {
1089 pcchunk->SourceOffset = cpu_to_le64(src_off);
1090 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1091 pcchunk->Length =
1092 cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
41c1358e 1093
9bf0c9cd
SF		 1094 /* Request server copy to target from src identified by key */
1095 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1096 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
63a83b86 1097 true /* is_fsctl */, (char *)pcchunk,
9bf0c9cd
SF		 1098 sizeof(struct copychunk_ioctl), (char **)&retbuf,
1099 &ret_data_len);
1100 if (rc == 0) {
1101 if (ret_data_len !=
1102 sizeof(struct copychunk_ioctl_rsp)) {
1103 cifs_dbg(VFS, "invalid cchunk response size\n");
1104 rc = -EIO;
1105 goto cchunk_out;
1106 }
1107 if (retbuf->TotalBytesWritten == 0) {
1108 cifs_dbg(FYI, "no bytes copied\n");
1109 rc = -EIO;
1110 goto cchunk_out;
1111 }
1112 /*
1113 * Check if server claimed to write more than we asked
1114 */
1115 if (le32_to_cpu(retbuf->TotalBytesWritten) >
1116 le32_to_cpu(pcchunk->Length)) {
1117 cifs_dbg(VFS, "invalid copy chunk response\n");
1118 rc = -EIO;
1119 goto cchunk_out;
1120 }
1121 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1122 cifs_dbg(VFS, "invalid num chunks written\n");
1123 rc = -EIO;
1124 goto cchunk_out;
1125 }
1126 chunks_copied++;
1127
620d8745
SP		 1128 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1129 src_off += bytes_written;
1130 dest_off += bytes_written;
1131 len -= bytes_written;
1132 total_bytes_written += bytes_written;
9bf0c9cd 1133
620d8745 1134 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
9bf0c9cd
SF		 1135 le32_to_cpu(retbuf->ChunksWritten),
1136 le32_to_cpu(retbuf->ChunkBytesWritten),
620d8745 1137 bytes_written);
9bf0c9cd
SF		 1138 } else if (rc == -EINVAL) {
1139 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1140 goto cchunk_out;
1141
1142 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1143 le32_to_cpu(retbuf->ChunksWritten),
1144 le32_to_cpu(retbuf->ChunkBytesWritten),
1145 le32_to_cpu(retbuf->TotalBytesWritten));
1146
1147 /*
1148 * Check if this is the first request using these sizes,
1149 * (ie check if copy succeed once with original sizes
1150 * and check if the server gave us different sizes after
1151 * we already updated max sizes on previous request).
1152 * if not then why is the server returning an error now
1153 */
1154 if ((chunks_copied != 0) || chunk_sizes_updated)
1155 goto cchunk_out;
1156
1157 /* Check that server is not asking us to grow size */
1158 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1159 tcon->max_bytes_chunk)
1160 tcon->max_bytes_chunk =
1161 le32_to_cpu(retbuf->ChunkBytesWritten);
1162 else
1163 goto cchunk_out; /* server gave us bogus size */
1164
1165 /* No need to change MaxChunks since already set to 1 */
1166 chunk_sizes_updated = true;
2477bc58
SP		 1167 } else
1168 goto cchunk_out;
9bf0c9cd 1169 }
41c1358e 1170
9bf0c9cd 1171cchunk_out:
41c1358e 1172 kfree(pcchunk);
24df1483 1173 kfree(retbuf);
620d8745
SP		 1174 if (rc)
1175 return rc;
1176 else
1177 return total_bytes_written;
41c1358e
SF		 1178}
1179
7a5cfb19
PS		 1180static int
1181smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1182 struct cifs_fid *fid)
1183{
1184 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1185}
1186
09a4707e
PS		 1187static unsigned int
1188smb2_read_data_offset(char *buf)
1189{
1190 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1191 return rsp->DataOffset;
1192}
1193
1194static unsigned int
74dcf418 1195smb2_read_data_length(char *buf, bool in_remaining)
09a4707e
PS		 1196{
1197 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
74dcf418
LL		 1198
1199 if (in_remaining)
1200 return le32_to_cpu(rsp->DataRemaining);
1201
09a4707e
PS		 1202 return le32_to_cpu(rsp->DataLength);
1203}
1204
d8e05039
PS		 1205
1206static int
db8b631d 1207smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
d8e05039
PS		 1208 struct cifs_io_parms *parms, unsigned int *bytes_read,
1209 char **buf, int *buf_type)
1210{
db8b631d
SF		 1211 parms->persistent_fid = pfid->persistent_fid;
1212 parms->volatile_fid = pfid->volatile_fid;
d8e05039
PS		 1213 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1214}
1215
009d3443 1216static int
db8b631d 1217smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
009d3443
PS		 1218 struct cifs_io_parms *parms, unsigned int *written,
1219 struct kvec *iov, unsigned long nr_segs)
1220{
1221
db8b631d
SF		 1222 parms->persistent_fid = pfid->persistent_fid;
1223 parms->volatile_fid = pfid->volatile_fid;
009d3443
PS		 1224 return SMB2_write(xid, parms, written, iov, nr_segs);
1225}
1226
d43cc793
SF		 1227/* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1228static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1229 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1230{
1231 struct cifsInodeInfo *cifsi;
1232 int rc;
1233
1234 cifsi = CIFS_I(inode);
1235
1236 /* if file already sparse don't bother setting sparse again */
1237 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1238 return true; /* already sparse */
1239
1240 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1241 return true; /* already not sparse */
1242
1243 /*
1244 * Can't check for sparse support on share the usual way via the
1245 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1246 * since Samba server doesn't set the flag on the share, yet
1247 * supports the set sparse FSCTL and returns sparse correctly
1248 * in the file attributes. If we fail setting sparse though we
1249 * mark that server does not support sparse files for this share
1250 * to avoid repeatedly sending the unsupported fsctl to server
1251 * if the file is repeatedly extended.
1252 */
1253 if (tcon->broken_sparse_sup)
1254 return false;
1255
1256 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1257 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
63a83b86 1258 true /* is_fctl */,
51146625 1259 &setsparse, 1, NULL, NULL);
d43cc793
SF		 1260 if (rc) {
1261 tcon->broken_sparse_sup = true;
1262 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1263 return false;
1264 }
1265
1266 if (setsparse)
1267 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1268 else
1269 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1270
1271 return true;
1272}
1273
c839ff24
PS		 1274static int
1275smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1276 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1277{
1278 __le64 eof = cpu_to_le64(size);
3d1a3745
SF		 1279 struct inode *inode;
1280
1281 /*
1282 * If extending file more than one page make sparse. Many Linux fs
1283 * make files sparse by default when extending via ftruncate
1284 */
2b0143b5 1285 inode = d_inode(cfile->dentry);
3d1a3745
SF		 1286
1287 if (!set_alloc && (size > inode->i_size + 8192)) {
3d1a3745 1288 __u8 set_sparse = 1;
d43cc793
SF		 1289
1290 /* whether set sparse succeeds or not, extend the file */
1291 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
3d1a3745
SF		 1292 }
1293
c839ff24 1294 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
f29ebb47 1295 cfile->fid.volatile_fid, cfile->pid, &eof, false);
c839ff24
PS		 1296}
1297
02b16665
SF		 1298static int
1299smb2_duplicate_extents(const unsigned int xid,
1300 struct cifsFileInfo *srcfile,
1301 struct cifsFileInfo *trgtfile, u64 src_off,
1302 u64 len, u64 dest_off)
1303{
1304 int rc;
1305 unsigned int ret_data_len;
02b16665
SF		 1306 struct duplicate_extents_to_file dup_ext_buf;
1307 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1308
1309 /* server fileays advertise duplicate extent support with this flag */
1310 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1311 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1312 return -EOPNOTSUPP;
1313
1314 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1315 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1316 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1317 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1318 dup_ext_buf.ByteCount = cpu_to_le64(len);
1319 cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
1320 src_off, dest_off, len);
1321
1322 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1323 if (rc)
1324 goto duplicate_extents_out;
1325
1326 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1327 trgtfile->fid.volatile_fid,
1328 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
63a83b86 1329 true /* is_fsctl */,
51146625 1330 (char *)&dup_ext_buf,
02b16665 1331 sizeof(struct duplicate_extents_to_file),
24df1483 1332 NULL,
02b16665
SF		 1333 &ret_data_len);
1334
1335 if (ret_data_len > 0)
1336 cifs_dbg(FYI, "non-zero response length in duplicate extents");
1337
1338duplicate_extents_out:
1339 return rc;
1340}
02b16665 1341
64a5cfa6
SF		 1342static int
1343smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1344 struct cifsFileInfo *cfile)
1345{
1346 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1347 cfile->fid.volatile_fid);
1348}
1349
b3152e2c
SF		 1350static int
1351smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1352 struct cifsFileInfo *cfile)
1353{
1354 struct fsctl_set_integrity_information_req integr_info;
b3152e2c
SF		 1355 unsigned int ret_data_len;
1356
1357 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1358 integr_info.Flags = 0;
1359 integr_info.Reserved = 0;
1360
1361 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1362 cfile->fid.volatile_fid,
1363 FSCTL_SET_INTEGRITY_INFORMATION,
63a83b86 1364 true /* is_fsctl */,
51146625 1365 (char *)&integr_info,
b3152e2c 1366 sizeof(struct fsctl_set_integrity_information_req),
24df1483 1367 NULL,
b3152e2c
SF		 1368 &ret_data_len);
1369
1370}
1371
834170c8
SF		 1372static int
1373smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1374 struct cifsFileInfo *cfile, void __user *ioc_buf)
1375{
1376 char *retbuf = NULL;
1377 unsigned int ret_data_len = 0;
1378 int rc;
1379 struct smb_snapshot_array snapshot_in;
1380
1381 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1382 cfile->fid.volatile_fid,
1383 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
63a83b86 1384 true /* is_fsctl */,
51146625 1385 NULL, 0 /* no input data */,
834170c8
SF		 1386 (char **)&retbuf,
1387 &ret_data_len);
1388 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1389 rc, ret_data_len);
1390 if (rc)
1391 return rc;
1392
1393 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
1394 /* Fixup buffer */
1395 if (copy_from_user(&snapshot_in, ioc_buf,
1396 sizeof(struct smb_snapshot_array))) {
1397 rc = -EFAULT;
1398 kfree(retbuf);
1399 return rc;
1400 }
1401 if (snapshot_in.snapshot_array_size < sizeof(struct smb_snapshot_array)) {
1402 rc = -ERANGE;
0e5c7955 1403 kfree(retbuf);
834170c8
SF		 1404 return rc;
1405 }
1406
1407 if (ret_data_len > snapshot_in.snapshot_array_size)
1408 ret_data_len = snapshot_in.snapshot_array_size;
1409
1410 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
1411 rc = -EFAULT;
1412 }
1413
1414 kfree(retbuf);
1415 return rc;
1416}
1417
d324f08d
PS		 1418static int
1419smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
1420 const char *path, struct cifs_sb_info *cifs_sb,
1421 struct cifs_fid *fid, __u16 search_flags,
1422 struct cifs_search_info *srch_inf)
1423{
1424 __le16 *utf16_path;
1425 int rc;
2e44b288 1426 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
064f6047 1427 struct cifs_open_parms oparms;
d324f08d
PS		 1428
1429 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1430 if (!utf16_path)
1431 return -ENOMEM;
1432
064f6047
PS		 1433 oparms.tcon = tcon;
1434 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
1435 oparms.disposition = FILE_OPEN;
1436 oparms.create_options = 0;
1437 oparms.fid = fid;
9cbc0b73 1438 oparms.reconnect = false;
064f6047 1439
9d874c36 1440 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
d324f08d
PS		 1441 kfree(utf16_path);
1442 if (rc) {
dcd87838 1443 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
d324f08d
PS		 1444 return rc;
1445 }
1446
1447 srch_inf->entries_in_buffer = 0;
1448 srch_inf->index_of_last_entry = 0;
d324f08d 1449
064f6047
PS		 1450 rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
1451 fid->volatile_fid, 0, srch_inf);
d324f08d 1452 if (rc) {
dcd87838 1453 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
064f6047 1454 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
d324f08d
PS		 1455 }
1456 return rc;
1457}
1458
1459static int
1460smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1461 struct cifs_fid *fid, __u16 search_flags,
1462 struct cifs_search_info *srch_inf)
1463{
1464 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1465 fid->volatile_fid, 0, srch_inf);
1466}
1467
1468static int
1469smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1470 struct cifs_fid *fid)
1471{
1472 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1473}
1474
2e44b288
PS		 1475/*
1476* If we negotiate SMB2 protocol and get STATUS_PENDING - update
1477* the number of credits and return true. Otherwise - return false.
1478*/
1479static bool
1480smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1481{
49f466bd 1482 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2e44b288 1483
31473fc4 1484 if (shdr->Status != STATUS_PENDING)
2e44b288
PS		 1485 return false;
1486
1487 if (!length) {
1488 spin_lock(&server->req_lock);
31473fc4 1489 server->credits += le16_to_cpu(shdr->CreditRequest);
2e44b288
PS		 1490 spin_unlock(&server->req_lock);
1491 wake_up(&server->request_q);
1492 }
1493
1494 return true;
1495}
1496
511c54a2
PS		 1497static bool
1498smb2_is_session_expired(char *buf)
1499{
49f466bd 1500 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
511c54a2 1501
d81243c6
MS		 1502 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
1503 shdr->Status != STATUS_USER_SESSION_DELETED)
511c54a2
PS		 1504 return false;
1505
e68a932b
SF		 1506 trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
1507 le16_to_cpu(shdr->Command),
1508 le64_to_cpu(shdr->MessageId));
d81243c6 1509 cifs_dbg(FYI, "Session expired or deleted\n");
e68a932b 1510
511c54a2
PS		 1511 return true;
1512}
1513
983c88a4
PS		 1514static int
1515smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1516 struct cifsInodeInfo *cinode)
1517{
0822f514
PS		 1518 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1519 return SMB2_lease_break(0, tcon, cinode->lease_key,
1520 smb2_get_lease_state(cinode));
1521
983c88a4
PS		 1522 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1523 fid->volatile_fid,
18cceb6a 1524 CIFS_CACHE_READ(cinode) ? 1 : 0);
983c88a4
PS		 1525}
1526
6fc05c25
PS		 1527static int
1528smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1529 struct kstatfs *buf)
1530{
1531 int rc;
6fc05c25
PS		 1532 __le16 srch_path = 0; /* Null - open root of share */
1533 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
064f6047
PS		 1534 struct cifs_open_parms oparms;
1535 struct cifs_fid fid;
1536
1537 oparms.tcon = tcon;
1538 oparms.desired_access = FILE_READ_ATTRIBUTES;
1539 oparms.disposition = FILE_OPEN;
1540 oparms.create_options = 0;
1541 oparms.fid = &fid;
9cbc0b73 1542 oparms.reconnect = false;
6fc05c25 1543
9d874c36 1544 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
6fc05c25
PS		 1545 if (rc)
1546 return rc;
1547 buf->f_type = SMB2_MAGIC_NUMBER;
064f6047
PS		 1548 rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1549 buf);
1550 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
6fc05c25
PS		 1551 return rc;
1552}
1553
2d304217
SF		 1554static int
1555smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1556 struct kstatfs *buf)
1557{
1558 int rc;
1559 __le16 srch_path = 0; /* Null - open root of share */
1560 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1561 struct cifs_open_parms oparms;
1562 struct cifs_fid fid;
1563
1564 if (!tcon->posix_extensions)
1565 return smb2_queryfs(xid, tcon, buf);
1566
1567 oparms.tcon = tcon;
1568 oparms.desired_access = FILE_READ_ATTRIBUTES;
1569 oparms.disposition = FILE_OPEN;
1570 oparms.create_options = 0;
1571 oparms.fid = &fid;
1572 oparms.reconnect = false;
1573
1574 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
1575 if (rc)
1576 return rc;
1577
1578 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
1579 fid.volatile_fid, buf);
1580 buf->f_type = SMB2_MAGIC_NUMBER;
1581 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1582 return rc;
1583}
2d304217 1584
027e8eec
PS		 1585static bool
1586smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1587{
1588 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1589 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1590}
1591
f7ba7fe6
PS		 1592static int
1593smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1594 __u64 length, __u32 type, int lock, int unlock, bool wait)
1595{
1596 if (unlock && !lock)
1597 type = SMB2_LOCKFLAG_UNLOCK;
1598 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1599 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1600 current->tgid, length, offset, type, wait);
1601}
1602
b8c32dbb
PS		 1603static void
1604smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1605{
1606 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1607}
1608
1609static void
1610smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1611{
1612 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1613}
1614
1615static void
1616smb2_new_lease_key(struct cifs_fid *fid)
1617{
fa70b87c 1618 generate_random_uuid(fid->lease_key);
b8c32dbb
PS		 1619}
1620
9d49640a
AA		 1621static int
1622smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
1623 const char *search_name,
1624 struct dfs_info3_param **target_nodes,
1625 unsigned int *num_of_nodes,
1626 const struct nls_table *nls_codepage, int remap)
1627{
1628 int rc;
1629 __le16 *utf16_path = NULL;
1630 int utf16_path_len = 0;
1631 struct cifs_tcon *tcon;
1632 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
1633 struct get_dfs_referral_rsp *dfs_rsp = NULL;
1634 u32 dfs_req_size = 0, dfs_rsp_size = 0;
1635
1636 cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
1637
1638 /*
63a83b86 1639 * Try to use the IPC tcon, otherwise just use any
9d49640a 1640 */
63a83b86
AA		 1641 tcon = ses->tcon_ipc;
1642 if (tcon == NULL) {
1643 spin_lock(&cifs_tcp_ses_lock);
1644 tcon = list_first_entry_or_null(&ses->tcon_list,
1645 struct cifs_tcon,
1646 tcon_list);
1647 if (tcon)
1648 tcon->tc_count++;
1649 spin_unlock(&cifs_tcp_ses_lock);
1650 }
1651
1652 if (tcon == NULL) {
9d49640a
AA		 1653 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
1654 ses);
1655 rc = -ENOTCONN;
1656 goto out;
1657 }
1658
1659 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
1660 &utf16_path_len,
1661 nls_codepage, remap);
1662 if (!utf16_path) {
1663 rc = -ENOMEM;
1664 goto out;
1665 }
1666
1667 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
1668 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
1669 if (!dfs_req) {
1670 rc = -ENOMEM;
1671 goto out;
1672 }
1673
1674 /* Highest DFS referral version understood */
1675 dfs_req->MaxReferralLevel = DFS_VERSION;
1676
1677 /* Path to resolve in an UTF-16 null-terminated string */
1678 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
1679
1680 do {
9d49640a
AA		 1681 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1682 FSCTL_DFS_GET_REFERRALS,
63a83b86 1683 true /* is_fsctl */,
9d49640a
AA		 1684 (char *)dfs_req, dfs_req_size,
1685 (char **)&dfs_rsp, &dfs_rsp_size);
9d49640a
AA		 1686 } while (rc == -EAGAIN);
1687
1688 if (rc) {
2564f2ff 1689 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
5702591f 1690 cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
9d49640a
AA		 1691 goto out;
1692 }
1693
1694 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
1695 num_of_nodes, target_nodes,
1696 nls_codepage, remap, search_name,
1697 true /* is_unicode */);
1698 if (rc) {
1699 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
1700 goto out;
1701 }
1702
1703 out:
63a83b86
AA		 1704 if (tcon && !tcon->ipc) {
1705 /* ipc tcons are not refcounted */
9d49640a
AA		 1706 spin_lock(&cifs_tcp_ses_lock);
1707 tcon->tc_count--;
1708 spin_unlock(&cifs_tcp_ses_lock);
1709 }
1710 kfree(utf16_path);
1711 kfree(dfs_req);
1712 kfree(dfs_rsp);
1713 return rc;
1714}
7893242e
PS		 1715#define SMB2_SYMLINK_STRUCT_SIZE \
1716 (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1717
b42bf888
PS		 1718static int
1719smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1720 const char *full_path, char **target_path,
1721 struct cifs_sb_info *cifs_sb)
1722{
1723 int rc;
1724 __le16 *utf16_path;
1725 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1726 struct cifs_open_parms oparms;
1727 struct cifs_fid fid;
91cb74f5 1728 struct kvec err_iov = {NULL, 0};
9d874c36
RS		 1729 struct smb2_err_rsp *err_buf = NULL;
1730 int resp_buftype;
b42bf888 1731 struct smb2_symlink_err_rsp *symlink;
7893242e
PS		 1732 unsigned int sub_len;
1733 unsigned int sub_offset;
1734 unsigned int print_len;
1735 unsigned int print_offset;
b42bf888
PS		 1736
1737 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1738
1739 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1740 if (!utf16_path)
1741 return -ENOMEM;
1742
1743 oparms.tcon = tcon;
1744 oparms.desired_access = FILE_READ_ATTRIBUTES;
1745 oparms.disposition = FILE_OPEN;
1746 oparms.create_options = 0;
1747 oparms.fid = &fid;
1748 oparms.reconnect = false;
1749
9d874c36
RS		 1750 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_iov,
1751 &resp_buftype);
0d568cd3 1752 if (!rc || !err_iov.iov_base) {
9d874c36 1753 rc = -ENOENT;
ff361fda 1754 goto free_path;
b42bf888 1755 }
7893242e 1756
91cb74f5 1757 err_buf = err_iov.iov_base;
7893242e 1758 if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1fc6ad2f 1759 err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
9d874c36
RS		 1760 rc = -ENOENT;
1761 goto querty_exit;
7893242e
PS		 1762 }
1763
b42bf888
PS		 1764 /* open must fail on symlink - reset rc */
1765 rc = 0;
1766 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1767 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1768 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
7893242e
PS		 1769 print_len = le16_to_cpu(symlink->PrintNameLength);
1770 print_offset = le16_to_cpu(symlink->PrintNameOffset);
1771
1fc6ad2f 1772 if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
9d874c36
RS		 1773 rc = -ENOENT;
1774 goto querty_exit;
7893242e
PS		 1775 }
1776
1fc6ad2f
RS		 1777 if (err_iov.iov_len <
1778 SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
9d874c36
RS		 1779 rc = -ENOENT;
1780 goto querty_exit;
7893242e
PS		 1781 }
1782
b42bf888
PS		 1783 *target_path = cifs_strndup_from_utf16(
1784 (char *)symlink->PathBuffer + sub_offset,
1785 sub_len, true, cifs_sb->local_nls);
1786 if (!(*target_path)) {
9d874c36
RS		 1787 rc = -ENOMEM;
1788 goto querty_exit;
b42bf888
PS		 1789 }
1790 convert_delimiter(*target_path, '/');
1791 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
9d874c36
RS		 1792
1793 querty_exit:
1794 free_rsp_buf(resp_buftype, err_buf);
ff361fda 1795 free_path:
b42bf888
PS		 1796 kfree(utf16_path);
1797 return rc;
1798}
1799
84908426 1800#ifdef CONFIG_CIFS_ACL
2f1afe25
SP		 1801static struct cifs_ntsd *
1802get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
1803 const struct cifs_fid *cifsfid, u32 *pacllen)
1804{
1805 struct cifs_ntsd *pntsd = NULL;
1806 unsigned int xid;
1807 int rc = -EOPNOTSUPP;
1808 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1809
1810 if (IS_ERR(tlink))
1811 return ERR_CAST(tlink);
1812
1813 xid = get_xid();
1814 cifs_dbg(FYI, "trying to get acl\n");
1815
1816 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
1817 cifsfid->volatile_fid, (void **)&pntsd, pacllen);
1818 free_xid(xid);
1819
1820 cifs_put_tlink(tlink);
1821
1822 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1823 if (rc)
1824 return ERR_PTR(rc);
1825 return pntsd;
1826
1827}
1828
1829static struct cifs_ntsd *
1830get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
1831 const char *path, u32 *pacllen)
1832{
1833 struct cifs_ntsd *pntsd = NULL;
1834 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1835 unsigned int xid;
1836 int rc;
1837 struct cifs_tcon *tcon;
1838 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1839 struct cifs_fid fid;
1840 struct cifs_open_parms oparms;
1841 __le16 *utf16_path;
1842
1843 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
1844 if (IS_ERR(tlink))
1845 return ERR_CAST(tlink);
1846
1847 tcon = tlink_tcon(tlink);
1848 xid = get_xid();
1849
1850 if (backup_cred(cifs_sb))
709340a0 1851 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2f1afe25
SP		 1852 else
1853 oparms.create_options = 0;
1854
1855 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
cfe89091
SF		 1856 if (!utf16_path) {
1857 rc = -ENOMEM;
1858 free_xid(xid);
1859 return ERR_PTR(rc);
1860 }
2f1afe25
SP		 1861
1862 oparms.tcon = tcon;
1863 oparms.desired_access = READ_CONTROL;
1864 oparms.disposition = FILE_OPEN;
1865 oparms.fid = &fid;
1866 oparms.reconnect = false;
1867
9d874c36 1868 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2f1afe25
SP		 1869 kfree(utf16_path);
1870 if (!rc) {
1871 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1872 fid.volatile_fid, (void **)&pntsd, pacllen);
1873 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1874 }
1875
1876 cifs_put_tlink(tlink);
1877 free_xid(xid);
1878
1879 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1880 if (rc)
1881 return ERR_PTR(rc);
1882 return pntsd;
1883}
1884
366ed846
SP		 1885#ifdef CONFIG_CIFS_ACL
1886static int
1887set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
1888 struct inode *inode, const char *path, int aclflag)
1889{
1890 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1891 unsigned int xid;
1892 int rc, access_flags = 0;
1893 struct cifs_tcon *tcon;
1894 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1895 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1896 struct cifs_fid fid;
1897 struct cifs_open_parms oparms;
1898 __le16 *utf16_path;
1899
1900 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
1901 if (IS_ERR(tlink))
1902 return PTR_ERR(tlink);
1903
1904 tcon = tlink_tcon(tlink);
1905 xid = get_xid();
1906
1907 if (backup_cred(cifs_sb))
1908 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1909 else
1910 oparms.create_options = 0;
1911
1912 if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
1913 access_flags = WRITE_OWNER;
1914 else
1915 access_flags = WRITE_DAC;
1916
1917 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
cfe89091
SF		 1918 if (!utf16_path) {
1919 rc = -ENOMEM;
1920 free_xid(xid);
1921 return rc;
1922 }
366ed846
SP		 1923
1924 oparms.tcon = tcon;
1925 oparms.desired_access = access_flags;
1926 oparms.disposition = FILE_OPEN;
1927 oparms.path = path;
1928 oparms.fid = &fid;
1929 oparms.reconnect = false;
1930
9d874c36 1931 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
366ed846
SP		 1932 kfree(utf16_path);
1933 if (!rc) {
1934 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1935 fid.volatile_fid, pnntsd, acllen, aclflag);
1936 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1937 }
1938
1939 cifs_put_tlink(tlink);
1940 free_xid(xid);
1941 return rc;
1942}
1943#endif /* CIFS_ACL */
1944
2f1afe25
SP		 1945/* Retrieve an ACL from the server */
1946static struct cifs_ntsd *
1947get_smb2_acl(struct cifs_sb_info *cifs_sb,
1948 struct inode *inode, const char *path,
1949 u32 *pacllen)
1950{
1951 struct cifs_ntsd *pntsd = NULL;
1952 struct cifsFileInfo *open_file = NULL;
1953
1954 if (inode)
1955 open_file = find_readable_file(CIFS_I(inode), true);
1956 if (!open_file)
1957 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
1958
1959 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
1960 cifsFileInfo_put(open_file);
1961 return pntsd;
1962}
84908426 1963#endif
2f1afe25 1964
30175628
SF		 1965static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1966 loff_t offset, loff_t len, bool keep_size)
1967{
1968 struct inode *inode;
1969 struct cifsInodeInfo *cifsi;
1970 struct cifsFileInfo *cfile = file->private_data;
1971 struct file_zero_data_information fsctl_buf;
1972 long rc;
1973 unsigned int xid;
1974
1975 xid = get_xid();
1976
2b0143b5 1977 inode = d_inode(cfile->dentry);
30175628
SF		 1978 cifsi = CIFS_I(inode);
1979
1980 /* if file not oplocked can't be sure whether asking to extend size */
1981 if (!CIFS_CACHE_READ(cifsi))
cfe89091
SF		 1982 if (keep_size == false) {
1983 rc = -EOPNOTSUPP;
1984 free_xid(xid);
1985 return rc;
1986 }
30175628 1987
2bb93d24 1988 /*
30175628
SF		 1989 * Must check if file sparse since fallocate -z (zero range) assumes
1990 * non-sparse allocation
1991 */
cfe89091
SF		 1992 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
1993 rc = -EOPNOTSUPP;
1994 free_xid(xid);
1995 return rc;
1996 }
30175628
SF		 1997
1998 /*
1999 * need to make sure we are not asked to extend the file since the SMB3
2000 * fsctl does not change the file size. In the future we could change
2001 * this to zero the first part of the range then set the file size
2002 * which for a non sparse file would zero the newly extended range
2003 */
2004 if (keep_size == false)
cfe89091
SF		 2005 if (i_size_read(inode) < offset + len) {
2006 rc = -EOPNOTSUPP;
2007 free_xid(xid);
2008 return rc;
2009 }
30175628
SF		 2010
2011 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
2012
2013 fsctl_buf.FileOffset = cpu_to_le64(offset);
2014 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
2015
2016 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2017 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
63a83b86 2018 true /* is_fctl */, (char *)&fsctl_buf,
30175628
SF		 2019 sizeof(struct file_zero_data_information), NULL, NULL);
2020 free_xid(xid);
2021 return rc;
2022}
2023
31742c5a
SF		 2024static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
2025 loff_t offset, loff_t len)
2026{
2027 struct inode *inode;
2028 struct cifsInodeInfo *cifsi;
2029 struct cifsFileInfo *cfile = file->private_data;
2030 struct file_zero_data_information fsctl_buf;
2031 long rc;
2032 unsigned int xid;
2033 __u8 set_sparse = 1;
2034
2035 xid = get_xid();
2036
2b0143b5 2037 inode = d_inode(cfile->dentry);
31742c5a
SF		 2038 cifsi = CIFS_I(inode);
2039
2040 /* Need to make file sparse, if not already, before freeing range. */
2041 /* Consider adding equivalent for compressed since it could also work */
cfe89091
SF		 2042 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
2043 rc = -EOPNOTSUPP;
2044 free_xid(xid);
2045 return rc;
2046 }
31742c5a
SF		 2047
2048 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
2049
2050 fsctl_buf.FileOffset = cpu_to_le64(offset);
2051 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
2052
2053 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2054 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
63a83b86 2055 true /* is_fctl */, (char *)&fsctl_buf,
31742c5a
SF		 2056 sizeof(struct file_zero_data_information), NULL, NULL);
2057 free_xid(xid);
2058 return rc;
2059}
2060
9ccf3216
SF		 2061static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
2062 loff_t off, loff_t len, bool keep_size)
2063{
2064 struct inode *inode;
2065 struct cifsInodeInfo *cifsi;
2066 struct cifsFileInfo *cfile = file->private_data;
2067 long rc = -EOPNOTSUPP;
2068 unsigned int xid;
2069
2070 xid = get_xid();
2071
2b0143b5 2072 inode = d_inode(cfile->dentry);
9ccf3216
SF		 2073 cifsi = CIFS_I(inode);
2074
2075 /* if file not oplocked can't be sure whether asking to extend size */
2076 if (!CIFS_CACHE_READ(cifsi))
cfe89091
SF		 2077 if (keep_size == false) {
2078 free_xid(xid);
2079 return rc;
2080 }
9ccf3216
SF		 2081
2082 /*
2083 * Files are non-sparse by default so falloc may be a no-op
2084 * Must check if file sparse. If not sparse, and not extending
2085 * then no need to do anything since file already allocated
2086 */
2087 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
2088 if (keep_size == true)
cfe89091 2089 rc = 0;
9ccf3216
SF		 2090 /* check if extending file */
2091 else if (i_size_read(inode) >= off + len)
2092 /* not extending file and already not sparse */
cfe89091 2093 rc = 0;
9ccf3216
SF		 2094 /* BB: in future add else clause to extend file */
2095 else
cfe89091
SF		 2096 rc = -EOPNOTSUPP;
2097 free_xid(xid);
2098 return rc;
9ccf3216
SF		 2099 }
2100
2101 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
2102 /*
2103 * Check if falloc starts within first few pages of file
2104 * and ends within a few pages of the end of file to
2105 * ensure that most of file is being forced to be
2106 * fallocated now. If so then setting whole file sparse
2107 * ie potentially making a few extra pages at the beginning
2108 * or end of the file non-sparse via set_sparse is harmless.
2109 */
cfe89091
SF		 2110 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
2111 rc = -EOPNOTSUPP;
2112 free_xid(xid);
2113 return rc;
2114 }
9ccf3216
SF		 2115
2116 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
2117 }
2118 /* BB: else ... in future add code to extend file and set sparse */
2119
2120
2121 free_xid(xid);
2122 return rc;
2123}
2124
2125
31742c5a
SF		 2126static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
2127 loff_t off, loff_t len)
2128{
2129 /* KEEP_SIZE already checked for by do_fallocate */
2130 if (mode & FALLOC_FL_PUNCH_HOLE)
2131 return smb3_punch_hole(file, tcon, off, len);
30175628
SF		 2132 else if (mode & FALLOC_FL_ZERO_RANGE) {
2133 if (mode & FALLOC_FL_KEEP_SIZE)
2134 return smb3_zero_range(file, tcon, off, len, true);
2135 return smb3_zero_range(file, tcon, off, len, false);
9ccf3216
SF		 2136 } else if (mode == FALLOC_FL_KEEP_SIZE)
2137 return smb3_simple_falloc(file, tcon, off, len, true);
2138 else if (mode == 0)
2139 return smb3_simple_falloc(file, tcon, off, len, false);
31742c5a
SF		 2140
2141 return -EOPNOTSUPP;
2142}
2143
c11f1df5
SP		 2144static void
2145smb2_downgrade_oplock(struct TCP_Server_Info *server,
2146 struct cifsInodeInfo *cinode, bool set_level2)
2147{
2148 if (set_level2)
2149 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
2150 0, NULL);
2151 else
2152 server->ops->set_oplock_level(cinode, 0, 0, NULL);
2153}
2154
53ef1016 2155static void
42873b0a
PS		 2156smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2157 unsigned int epoch, bool *purge_cache)
53ef1016
PS		 2158{
2159 oplock &= 0xFF;
2160 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2161 return;
2162 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
42873b0a 2163 cinode->oplock = CIFS_CACHE_RHW_FLG;
53ef1016
PS		 2164 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
2165 &cinode->vfs_inode);
2166 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
42873b0a 2167 cinode->oplock = CIFS_CACHE_RW_FLG;
53ef1016
PS		 2168 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
2169 &cinode->vfs_inode);
2170 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
2171 cinode->oplock = CIFS_CACHE_READ_FLG;
2172 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
2173 &cinode->vfs_inode);
2174 } else
2175 cinode->oplock = 0;
2176}
2177
2178static void
42873b0a
PS		 2179smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2180 unsigned int epoch, bool *purge_cache)
53ef1016
PS		 2181{
2182 char message[5] = {0};
2183
2184 oplock &= 0xFF;
2185 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2186 return;
2187
2188 cinode->oplock = 0;
2189 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
2190 cinode->oplock |= CIFS_CACHE_READ_FLG;
2191 strcat(message, "R");
2192 }
2193 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
2194 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
2195 strcat(message, "H");
2196 }
2197 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
2198 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
2199 strcat(message, "W");
2200 }
2201 if (!cinode->oplock)
2202 strcat(message, "None");
2203 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
2204 &cinode->vfs_inode);
2205}
2206
42873b0a
PS		 2207static void
2208smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2209 unsigned int epoch, bool *purge_cache)
2210{
2211 unsigned int old_oplock = cinode->oplock;
2212
2213 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
2214
2215 if (purge_cache) {
2216 *purge_cache = false;
2217 if (old_oplock == CIFS_CACHE_READ_FLG) {
2218 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
2219 (epoch - cinode->epoch > 0))
2220 *purge_cache = true;
2221 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2222 (epoch - cinode->epoch > 1))
2223 *purge_cache = true;
2224 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2225 (epoch - cinode->epoch > 1))
2226 *purge_cache = true;
2227 else if (cinode->oplock == 0 &&
2228 (epoch - cinode->epoch > 0))
2229 *purge_cache = true;
2230 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
2231 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2232 (epoch - cinode->epoch > 0))
2233 *purge_cache = true;
2234 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2235 (epoch - cinode->epoch > 1))
2236 *purge_cache = true;
2237 }
2238 cinode->epoch = epoch;
2239 }
2240}
2241
53ef1016
PS		 2242static bool
2243smb2_is_read_op(__u32 oplock)
2244{
2245 return oplock == SMB2_OPLOCK_LEVEL_II;
2246}
2247
2248static bool
2249smb21_is_read_op(__u32 oplock)
2250{
2251 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
2252 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
2253}
2254
f047390a
PS		 2255static __le32
2256map_oplock_to_lease(u8 oplock)
2257{
2258 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
2259 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
2260 else if (oplock == SMB2_OPLOCK_LEVEL_II)
2261 return SMB2_LEASE_READ_CACHING;
2262 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
2263 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
2264 SMB2_LEASE_WRITE_CACHING;
2265 return 0;
2266}
2267
a41a28bd
PS		 2268static char *
2269smb2_create_lease_buf(u8 *lease_key, u8 oplock)
2270{
2271 struct create_lease *buf;
2272
2273 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
2274 if (!buf)
2275 return NULL;
2276
729c0c9d 2277 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
f047390a 2278 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
a41a28bd
PS		 2279
2280 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2281 (struct create_lease, lcontext));
2282 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
2283 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2284 (struct create_lease, Name));
2285 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 2286 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
a41a28bd
PS		 2287 buf->Name[0] = 'R';
2288 buf->Name[1] = 'q';
2289 buf->Name[2] = 'L';
2290 buf->Name[3] = 's';
2291 return (char *)buf;
2292}
2293
f047390a
PS		 2294static char *
2295smb3_create_lease_buf(u8 *lease_key, u8 oplock)
2296{
2297 struct create_lease_v2 *buf;
2298
2299 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
2300 if (!buf)
2301 return NULL;
2302
729c0c9d 2303 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
f047390a
PS		 2304 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2305
2306 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2307 (struct create_lease_v2, lcontext));
2308 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
2309 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2310 (struct create_lease_v2, Name));
2311 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 2312 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
f047390a
PS		 2313 buf->Name[0] = 'R';
2314 buf->Name[1] = 'q';
2315 buf->Name[2] = 'L';
2316 buf->Name[3] = 's';
2317 return (char *)buf;
2318}
2319
b5c7cde3 2320static __u8
96164ab2 2321smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
b5c7cde3
PS		 2322{
2323 struct create_lease *lc = (struct create_lease *)buf;
2324
42873b0a 2325 *epoch = 0; /* not used */
b5c7cde3
PS		 2326 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2327 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2328 return le32_to_cpu(lc->lcontext.LeaseState);
2329}
2330
f047390a 2331static __u8
96164ab2 2332smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
f047390a
PS		 2333{
2334 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
2335
42873b0a 2336 *epoch = le16_to_cpu(lc->lcontext.Epoch);
f047390a
PS		 2337 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2338 return SMB2_OPLOCK_LEVEL_NOCHANGE;
96164ab2 2339 if (lease_key)
729c0c9d 2340 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
f047390a
PS		 2341 return le32_to_cpu(lc->lcontext.LeaseState);
2342}
2343
7f6c5008
PS		 2344static unsigned int
2345smb2_wp_retry_size(struct inode *inode)
2346{
2347 return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
2348 SMB2_MAX_BUFFER_SIZE);
2349}
2350
52755808
PS		 2351static bool
2352smb2_dir_needs_close(struct cifsFileInfo *cfile)
2353{
2354 return !cfile->invalidHandle;
2355}
2356
026e93dc 2357static void
977b6170
RS		 2358fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
2359 struct smb_rqst *old_rq)
026e93dc
PS		 2360{
2361 struct smb2_sync_hdr *shdr =
c713c877 2362 (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
026e93dc
PS		 2363
2364 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
2365 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
2366 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
2367 tr_hdr->Flags = cpu_to_le16(0x01);
2368 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2369 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
026e93dc
PS		 2370}
2371
262916bc
RS		 2372/* We can not use the normal sg_set_buf() as we will sometimes pass a
2373 * stack object as buf.
2374 */
2375static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
2376 unsigned int buflen)
2377{
2378 sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
2379}
2380
b2c96de7
RS		 2381/* Assumes the first rqst has a transform header as the first iov.
2382 * I.e.
2383 * rqst[0].rq_iov[0] is transform header
2384 * rqst[0].rq_iov[1+] data to be encrypted/decrypted
2385 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
977b6170 2386 */
026e93dc 2387static struct scatterlist *
b2c96de7 2388init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
026e93dc 2389{
b2c96de7 2390 unsigned int sg_len;
026e93dc
PS		 2391 struct scatterlist *sg;
2392 unsigned int i;
2393 unsigned int j;
b2c96de7
RS		 2394 unsigned int idx = 0;
2395 int skip;
2396
2397 sg_len = 1;
2398 for (i = 0; i < num_rqst; i++)
2399 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
026e93dc
PS		 2400
2401 sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
2402 if (!sg)
2403 return NULL;
2404
2405 sg_init_table(sg, sg_len);
b2c96de7
RS		 2406 for (i = 0; i < num_rqst; i++) {
2407 for (j = 0; j < rqst[i].rq_nvec; j++) {
2408 /*
2409 * The first rqst has a transform header where the
2410 * first 20 bytes are not part of the encrypted blob
2411 */
2412 skip = (i == 0) && (j == 0) ? 20 : 0;
2413 smb2_sg_set_buf(&sg[idx++],
2414 rqst[i].rq_iov[j].iov_base + skip,
2415 rqst[i].rq_iov[j].iov_len - skip);
2416 }
2417
2418 for (j = 0; j < rqst[i].rq_npages; j++) {
2419 unsigned int len, offset;
d5f07fb3 2420
b2c96de7
RS		 2421 rqst_page_get_length(&rqst[i], j, &len, &offset);
2422 sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
2423 }
026e93dc 2424 }
b2c96de7 2425 smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
026e93dc
PS		 2426 return sg;
2427}
2428
61cfac6f
PS		 2429static int
2430smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
2431{
2432 struct cifs_ses *ses;
2433 u8 *ses_enc_key;
2434
2435 spin_lock(&cifs_tcp_ses_lock);
2436 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2437 if (ses->Suid != ses_id)
2438 continue;
2439 ses_enc_key = enc ? ses->smb3encryptionkey :
2440 ses->smb3decryptionkey;
2441 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
2442 spin_unlock(&cifs_tcp_ses_lock);
2443 return 0;
2444 }
2445 spin_unlock(&cifs_tcp_ses_lock);
2446
2447 return 1;
2448}
026e93dc 2449/*
c713c877
RS		 2450 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
2451 * iov[0] - transform header (associate data),
2452 * iov[1-N] - SMB2 header and pages - data to encrypt.
2453 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
026e93dc
PS		 2454 * untouched.
2455 */
2456static int
b2c96de7
RS		 2457crypt_message(struct TCP_Server_Info *server, int num_rqst,
2458 struct smb_rqst *rqst, int enc)
026e93dc
PS		 2459{
2460 struct smb2_transform_hdr *tr_hdr =
b2c96de7 2461 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
1fc6ad2f 2462 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
026e93dc
PS		 2463 int rc = 0;
2464 struct scatterlist *sg;
2465 u8 sign[SMB2_SIGNATURE_SIZE] = {};
61cfac6f 2466 u8 key[SMB3_SIGN_KEY_SIZE];
026e93dc
PS		 2467 struct aead_request *req;
2468 char *iv;
2469 unsigned int iv_len;
a5186b85 2470 DECLARE_CRYPTO_WAIT(wait);
026e93dc
PS		 2471 struct crypto_aead *tfm;
2472 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2473
61cfac6f
PS		 2474 rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
2475 if (rc) {
2476 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
2477 enc ? "en" : "de");
026e93dc
PS		 2478 return 0;
2479 }
2480
2481 rc = smb3_crypto_aead_allocate(server);
2482 if (rc) {
2483 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
2484 return rc;
2485 }
2486
2487 tfm = enc ? server->secmech.ccmaesencrypt :
2488 server->secmech.ccmaesdecrypt;
61cfac6f 2489 rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
026e93dc
PS		 2490 if (rc) {
2491 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
2492 return rc;
2493 }
2494
2495 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
2496 if (rc) {
2497 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
2498 return rc;
2499 }
2500
2501 req = aead_request_alloc(tfm, GFP_KERNEL);
2502 if (!req) {
2503 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
2504 return -ENOMEM;
2505 }
2506
2507 if (!enc) {
2508 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
2509 crypt_len += SMB2_SIGNATURE_SIZE;
2510 }
2511
b2c96de7 2512 sg = init_sg(num_rqst, rqst, sign);
026e93dc 2513 if (!sg) {
517a6e43
CJ		 2514 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
2515 rc = -ENOMEM;
026e93dc
PS		 2516 goto free_req;
2517 }
2518
2519 iv_len = crypto_aead_ivsize(tfm);
2520 iv = kzalloc(iv_len, GFP_KERNEL);
2521 if (!iv) {
2522 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
517a6e43 2523 rc = -ENOMEM;
026e93dc
PS		 2524 goto free_sg;
2525 }
2526 iv[0] = 3;
2527 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2528
2529 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
2530 aead_request_set_ad(req, assoc_data_len);
2531
2532 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
a5186b85 2533 crypto_req_done, &wait);
026e93dc 2534
a5186b85
GBY		 2535 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
2536 : crypto_aead_decrypt(req), &wait);
026e93dc
PS		 2537
2538 if (!rc && enc)
2539 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
2540
2541 kfree(iv);
2542free_sg:
2543 kfree(sg);
2544free_req:
2545 kfree(req);
2546 return rc;
2547}
2548
b2c96de7
RS		 2549void
2550smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
2551{
2552 int i, j;
2553
2554 for (i = 0; i < num_rqst; i++) {
2555 if (rqst[i].rq_pages) {
2556 for (j = rqst[i].rq_npages - 1; j >= 0; j--)
2557 put_page(rqst[i].rq_pages[j]);
2558 kfree(rqst[i].rq_pages);
2559 }
2560 }
2561}
2562
2563/*
2564 * This function will initialize new_rq and encrypt the content.
2565 * The first entry, new_rq[0], only contains a single iov which contains
2566 * a smb2_transform_hdr and is pre-allocated by the caller.
2567 * This function then populates new_rq[1+] with the content from olq_rq[0+].
2568 *
2569 * The end result is an array of smb_rqst structures where the first structure
2570 * only contains a single iov for the transform header which we then can pass
2571 * to crypt_message().
2572 *
2573 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller
2574 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
2575 */
026e93dc 2576static int
b2c96de7
RS		 2577smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
2578 struct smb_rqst *new_rq, struct smb_rqst *old_rq)
026e93dc 2579{
026e93dc 2580 struct page **pages;
b2c96de7
RS		 2581 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
2582 unsigned int npages;
2583 unsigned int orig_len = 0;
2584 int i, j;
026e93dc
PS		 2585 int rc = -ENOMEM;
2586
b2c96de7
RS		 2587 for (i = 1; i < num_rqst; i++) {
2588 npages = old_rq[i - 1].rq_npages;
2589 pages = kmalloc_array(npages, sizeof(struct page *),
2590 GFP_KERNEL);
2591 if (!pages)
2592 goto err_free;
2593
2594 new_rq[i].rq_pages = pages;
2595 new_rq[i].rq_npages = npages;
2596 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
2597 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
2598 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
2599 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
2600 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
2601
2602 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
2603
2604 for (j = 0; j < npages; j++) {
2605 pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2606 if (!pages[j])
2607 goto err_free;
2608 }
026e93dc 2609
b2c96de7
RS		 2610 /* copy pages form the old */
2611 for (j = 0; j < npages; j++) {
2612 char *dst, *src;
2613 unsigned int offset, len;
977b6170 2614
b2c96de7 2615 rqst_page_get_length(&new_rq[i], j, &len, &offset);
026e93dc 2616
b2c96de7
RS		 2617 dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
2618 src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
026e93dc 2619
b2c96de7
RS		 2620 memcpy(dst, src, len);
2621 kunmap(new_rq[i].rq_pages[j]);
2622 kunmap(old_rq[i - 1].rq_pages[j]);
2623 }
2624 }
35e2cc1b 2625
b2c96de7 2626 /* fill the 1st iov with a transform header */
977b6170 2627 fill_transform_hdr(tr_hdr, orig_len, old_rq);
d5f07fb3 2628
b2c96de7 2629 rc = crypt_message(server, num_rqst, new_rq, 1);
026e93dc
PS		 2630 cifs_dbg(FYI, "encrypt message returned %d", rc);
2631 if (rc)
b2c96de7 2632 goto err_free;
026e93dc
PS		 2633
2634 return rc;
2635
b2c96de7
RS		 2636err_free:
2637 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
026e93dc
PS		 2638 return rc;
2639}
2640
4326ed2f
PS		 2641static int
2642smb3_is_transform_hdr(void *buf)
2643{
2644 struct smb2_transform_hdr *trhdr = buf;
2645
2646 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
2647}
2648
2649static int
2650decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
2651 unsigned int buf_data_size, struct page **pages,
2652 unsigned int npages, unsigned int page_data_size)
2653{
c713c877 2654 struct kvec iov[2];
4326ed2f 2655 struct smb_rqst rqst = {NULL};
4326ed2f
PS		 2656 int rc;
2657
c713c877
RS		 2658 iov[0].iov_base = buf;
2659 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2660 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
2661 iov[1].iov_len = buf_data_size;
4326ed2f
PS		 2662
2663 rqst.rq_iov = iov;
c713c877 2664 rqst.rq_nvec = 2;
4326ed2f
PS		 2665 rqst.rq_pages = pages;
2666 rqst.rq_npages = npages;
2667 rqst.rq_pagesz = PAGE_SIZE;
2668 rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
2669
b2c96de7 2670 rc = crypt_message(server, 1, &rqst, 0);
4326ed2f
PS		 2671 cifs_dbg(FYI, "decrypt message returned %d\n", rc);
2672
2673 if (rc)
2674 return rc;
2675
c713c877 2676 memmove(buf, iov[1].iov_base, buf_data_size);
977b6170
RS		 2677
2678 server->total_read = buf_data_size + page_data_size;
4326ed2f
PS		 2679
2680 return rc;
2681}
2682
c42a6abe
PS		 2683static int
2684read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
2685 unsigned int npages, unsigned int len)
2686{
2687 int i;
2688 int length;
2689
2690 for (i = 0; i < npages; i++) {
2691 struct page *page = pages[i];
2692 size_t n;
2693
2694 n = len;
2695 if (len >= PAGE_SIZE) {
2696 /* enough data to fill the page */
2697 n = PAGE_SIZE;
2698 len -= n;
2699 } else {
2700 zero_user(page, len, PAGE_SIZE - len);
2701 len = 0;
2702 }
1dbe3466 2703 length = cifs_read_page_from_socket(server, page, 0, n);
c42a6abe
PS		 2704 if (length < 0)
2705 return length;
2706 server->total_read += length;
2707 }
2708
2709 return 0;
2710}
2711
2712static int
2713init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
2714 unsigned int cur_off, struct bio_vec **page_vec)
2715{
2716 struct bio_vec *bvec;
2717 int i;
2718
2719 bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
2720 if (!bvec)
2721 return -ENOMEM;
2722
2723 for (i = 0; i < npages; i++) {
2724 bvec[i].bv_page = pages[i];
2725 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
2726 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
2727 data_size -= bvec[i].bv_len;
2728 }
2729
2730 if (data_size != 0) {
2731 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
2732 kfree(bvec);
2733 return -EIO;
2734 }
2735
2736 *page_vec = bvec;
2737 return 0;
2738}
2739
4326ed2f
PS		 2740static int
2741handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
2742 char *buf, unsigned int buf_len, struct page **pages,
2743 unsigned int npages, unsigned int page_data_size)
2744{
2745 unsigned int data_offset;
2746 unsigned int data_len;
c42a6abe
PS		 2747 unsigned int cur_off;
2748 unsigned int cur_page_idx;
2749 unsigned int pad_len;
4326ed2f 2750 struct cifs_readdata *rdata = mid->callback_data;
49f466bd 2751 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
4326ed2f
PS		 2752 struct bio_vec *bvec = NULL;
2753 struct iov_iter iter;
2754 struct kvec iov;
2755 int length;
74dcf418 2756 bool use_rdma_mr = false;
4326ed2f
PS		 2757
2758 if (shdr->Command != SMB2_READ) {
2759 cifs_dbg(VFS, "only big read responses are supported\n");
2760 return -ENOTSUPP;
2761 }
2762
511c54a2
PS		 2763 if (server->ops->is_session_expired &&
2764 server->ops->is_session_expired(buf)) {
2765 cifs_reconnect(server);
2766 wake_up(&server->response_q);
2767 return -1;
2768 }
2769
4326ed2f
PS		 2770 if (server->ops->is_status_pending &&
2771 server->ops->is_status_pending(buf, server, 0))
2772 return -1;
2773
2774 rdata->result = server->ops->map_error(buf, false);
2775 if (rdata->result != 0) {
2776 cifs_dbg(FYI, "%s: server returned error %d\n",
2777 __func__, rdata->result);
2778 dequeue_mid(mid, rdata->result);
2779 return 0;
2780 }
2781
1fc6ad2f 2782 data_offset = server->ops->read_data_offset(buf);
74dcf418
LL		 2783#ifdef CONFIG_CIFS_SMB_DIRECT
2784 use_rdma_mr = rdata->mr;
2785#endif
2786 data_len = server->ops->read_data_length(buf, use_rdma_mr);
4326ed2f
PS		 2787
2788 if (data_offset < server->vals->read_rsp_size) {
2789 /*
2790 * win2k8 sometimes sends an offset of 0 when the read
2791 * is beyond the EOF. Treat it as if the data starts just after
2792 * the header.
2793 */
2794 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
2795 __func__, data_offset);
2796 data_offset = server->vals->read_rsp_size;
2797 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
2798 /* data_offset is beyond the end of smallbuf */
2799 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
2800 __func__, data_offset);
2801 rdata->result = -EIO;
2802 dequeue_mid(mid, rdata->result);
2803 return 0;
2804 }
2805
c42a6abe
PS		 2806 pad_len = data_offset - server->vals->read_rsp_size;
2807
4326ed2f
PS		 2808 if (buf_len <= data_offset) {
2809 /* read response payload is in pages */
c42a6abe
PS		 2810 cur_page_idx = pad_len / PAGE_SIZE;
2811 cur_off = pad_len % PAGE_SIZE;
2812
2813 if (cur_page_idx != 0) {
2814 /* data offset is beyond the 1st page of response */
2815 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
2816 __func__, data_offset);
2817 rdata->result = -EIO;
2818 dequeue_mid(mid, rdata->result);
2819 return 0;
2820 }
2821
2822 if (data_len > page_data_size - pad_len) {
2823 /* data_len is corrupt -- discard frame */
2824 rdata->result = -EIO;
2825 dequeue_mid(mid, rdata->result);
2826 return 0;
2827 }
2828
2829 rdata->result = init_read_bvec(pages, npages, page_data_size,
2830 cur_off, &bvec);
2831 if (rdata->result != 0) {
2832 dequeue_mid(mid, rdata->result);
2833 return 0;
2834 }
2835
2836 iov_iter_bvec(&iter, WRITE | ITER_BVEC, bvec, npages, data_len);
4326ed2f
PS		 2837 } else if (buf_len >= data_offset + data_len) {
2838 /* read response payload is in buf */
2839 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
2840 iov.iov_base = buf + data_offset;
2841 iov.iov_len = data_len;
2842 iov_iter_kvec(&iter, WRITE | ITER_KVEC, &iov, 1, data_len);
2843 } else {
2844 /* read response payload cannot be in both buf and pages */
2845 WARN_ONCE(1, "buf can not contain only a part of read data");
2846 rdata->result = -EIO;
2847 dequeue_mid(mid, rdata->result);
2848 return 0;
2849 }
2850
2851 /* set up first iov for signature check */
2852 rdata->iov[0].iov_base = buf;
2853 rdata->iov[0].iov_len = 4;
2854 rdata->iov[1].iov_base = buf + 4;
2855 rdata->iov[1].iov_len = server->vals->read_rsp_size - 4;
2856 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
2857 rdata->iov[0].iov_base, server->vals->read_rsp_size);
2858
2859 length = rdata->copy_into_pages(server, rdata, &iter);
2860
2861 kfree(bvec);
2862
2863 if (length < 0)
2864 return length;
2865
2866 dequeue_mid(mid, false);
2867 return length;
2868}
2869
c42a6abe
PS		 2870static int
2871receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2872{
2873 char *buf = server->smallbuf;
2874 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2875 unsigned int npages;
2876 struct page **pages;
2877 unsigned int len;
1fc6ad2f 2878 unsigned int buflen = server->pdu_size;
c42a6abe
PS		 2879 int rc;
2880 int i = 0;
2881
1fc6ad2f 2882 len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
c42a6abe
PS		 2883 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
2884
2885 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
2886 if (rc < 0)
2887 return rc;
2888 server->total_read += rc;
2889
1fc6ad2f 2890 len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
93012bf9 2891 server->vals->read_rsp_size;
c42a6abe
PS		 2892 npages = DIV_ROUND_UP(len, PAGE_SIZE);
2893
2894 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2895 if (!pages) {
2896 rc = -ENOMEM;
2897 goto discard_data;
2898 }
2899
2900 for (; i < npages; i++) {
2901 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2902 if (!pages[i]) {
2903 rc = -ENOMEM;
2904 goto discard_data;
2905 }
2906 }
2907
2908 /* read read data into pages */
2909 rc = read_data_into_pages(server, pages, npages, len);
2910 if (rc)
2911 goto free_pages;
2912
350be257 2913 rc = cifs_discard_remaining_data(server);
c42a6abe
PS		 2914 if (rc)
2915 goto free_pages;
2916
1fc6ad2f 2917 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
c42a6abe
PS		 2918 pages, npages, len);
2919 if (rc)
2920 goto free_pages;
2921
2922 *mid = smb2_find_mid(server, buf);
2923 if (*mid == NULL)
2924 cifs_dbg(FYI, "mid not found\n");
2925 else {
2926 cifs_dbg(FYI, "mid found\n");
2927 (*mid)->decrypted = true;
2928 rc = handle_read_data(server, *mid, buf,
2929 server->vals->read_rsp_size,
2930 pages, npages, len);
2931 }
2932
2933free_pages:
2934 for (i = i - 1; i >= 0; i--)
2935 put_page(pages[i]);
2936 kfree(pages);
2937 return rc;
2938discard_data:
350be257 2939 cifs_discard_remaining_data(server);
c42a6abe
PS		 2940 goto free_pages;
2941}
2942
4326ed2f
PS		 2943static int
2944receive_encrypted_standard(struct TCP_Server_Info *server,
b24df3e3
RS		 2945 struct mid_q_entry **mids, char **bufs,
2946 int *num_mids)
4326ed2f 2947{
b24df3e3 2948 int ret, length;
4326ed2f 2949 char *buf = server->smallbuf;
b24df3e3
RS		 2950 char *tmpbuf;
2951 struct smb2_sync_hdr *shdr;
2e96467d 2952 unsigned int pdu_length = server->pdu_size;
4326ed2f
PS		 2953 unsigned int buf_size;
2954 struct mid_q_entry *mid_entry;
b24df3e3
RS		 2955 int next_is_large;
2956 char *next_buffer = NULL;
2957
2958 *num_mids = 0;
4326ed2f
PS		 2959
2960 /* switch to large buffer if too big for a small one */
1fc6ad2f 2961 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4326ed2f
PS		 2962 server->large_buf = true;
2963 memcpy(server->bigbuf, buf, server->total_read);
2964 buf = server->bigbuf;
2965 }
2966
2967 /* now read the rest */
2968 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
1fc6ad2f 2969 pdu_length - HEADER_SIZE(server) + 1);
4326ed2f
PS		 2970 if (length < 0)
2971 return length;
2972 server->total_read += length;
2973
1fc6ad2f 2974 buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4326ed2f
PS		 2975 length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
2976 if (length)
2977 return length;
2978
b24df3e3
RS		 2979 next_is_large = server->large_buf;
2980 one_more:
2981 shdr = (struct smb2_sync_hdr *)buf;
2982 if (shdr->NextCommand) {
2983 if (next_is_large) {
2984 tmpbuf = server->bigbuf;
2985 next_buffer = (char *)cifs_buf_get();
2986 } else {
2987 tmpbuf = server->smallbuf;
2988 next_buffer = (char *)cifs_small_buf_get();
2989 }
2990 memcpy(next_buffer,
2991 tmpbuf + le32_to_cpu(shdr->NextCommand),
2992 pdu_length - le32_to_cpu(shdr->NextCommand));
2993 }
2994
4326ed2f
PS		 2995 mid_entry = smb2_find_mid(server, buf);
2996 if (mid_entry == NULL)
2997 cifs_dbg(FYI, "mid not found\n");
2998 else {
2999 cifs_dbg(FYI, "mid found\n");
3000 mid_entry->decrypted = true;
b24df3e3 3001 mid_entry->resp_buf_size = server->pdu_size;
4326ed2f
PS		 3002 }
3003
b24df3e3
RS		 3004 if (*num_mids >= MAX_COMPOUND) {
3005 cifs_dbg(VFS, "too many PDUs in compound\n");
3006 return -1;
3007 }
3008 bufs[*num_mids] = buf;
3009 mids[(*num_mids)++] = mid_entry;
4326ed2f
PS		 3010
3011 if (mid_entry && mid_entry->handle)
b24df3e3
RS		 3012 ret = mid_entry->handle(server, mid_entry);
3013 else
3014 ret = cifs_handle_standard(server, mid_entry);
3015
3016 if (ret == 0 && shdr->NextCommand) {
3017 pdu_length -= le32_to_cpu(shdr->NextCommand);
3018 server->large_buf = next_is_large;
3019 if (next_is_large)
3020 server->bigbuf = next_buffer;
3021 else
3022 server->smallbuf = next_buffer;
3023
3024 buf += le32_to_cpu(shdr->NextCommand);
3025 goto one_more;
3026 }
4326ed2f 3027
b24df3e3 3028 return ret;
4326ed2f
PS		 3029}
3030
3031static int
b24df3e3
RS		 3032smb3_receive_transform(struct TCP_Server_Info *server,
3033 struct mid_q_entry **mids, char **bufs, int *num_mids)
4326ed2f
PS		 3034{
3035 char *buf = server->smallbuf;
2e96467d 3036 unsigned int pdu_length = server->pdu_size;
4326ed2f
PS		 3037 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
3038 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
3039
1fc6ad2f 3040 if (pdu_length < sizeof(struct smb2_transform_hdr) +
4326ed2f
PS		 3041 sizeof(struct smb2_sync_hdr)) {
3042 cifs_dbg(VFS, "Transform message is too small (%u)\n",
3043 pdu_length);
3044 cifs_reconnect(server);
3045 wake_up(&server->response_q);
3046 return -ECONNABORTED;
3047 }
3048
1fc6ad2f 3049 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4326ed2f
PS		 3050 cifs_dbg(VFS, "Transform message is broken\n");
3051 cifs_reconnect(server);
3052 wake_up(&server->response_q);
3053 return -ECONNABORTED;
3054 }
3055
b24df3e3 3056 /* TODO: add support for compounds containing READ. */
1fc6ad2f 3057 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
b24df3e3 3058 return receive_encrypted_read(server, &mids[0]);
4326ed2f 3059
b24df3e3 3060 return receive_encrypted_standard(server, mids, bufs, num_mids);
4326ed2f
PS		 3061}
3062
3063int
3064smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
3065{
3066 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
3067
1fc6ad2f 3068 return handle_read_data(server, mid, buf, server->pdu_size,
4326ed2f
PS		 3069 NULL, 0, 0);
3070}
3071
8ce79ec3
RS		 3072static int
3073smb2_next_header(char *buf)
3074{
3075 struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
3076 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
3077
3078 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
3079 return sizeof(struct smb2_transform_hdr) +
3080 le32_to_cpu(t_hdr->OriginalMessageSize);
3081
3082 return le32_to_cpu(hdr->NextCommand);
3083}
3084
53ef1016 3085struct smb_version_operations smb20_operations = {
027e8eec 3086 .compare_fids = smb2_compare_fids,
2dc7e1c0 3087 .setup_request = smb2_setup_request,
c95b8eed 3088 .setup_async_request = smb2_setup_async_request,
2dc7e1c0 3089 .check_receive = smb2_check_receive,
28ea5290
PS		 3090 .add_credits = smb2_add_credits,
3091 .set_credits = smb2_set_credits,
3092 .get_credits_field = smb2_get_credits_field,
3093 .get_credits = smb2_get_credits,
cb7e9eab 3094 .wait_mtu_credits = cifs_wait_mtu_credits,
2dc7e1c0 3095 .get_next_mid = smb2_get_next_mid,
09a4707e
PS		 3096 .read_data_offset = smb2_read_data_offset,
3097 .read_data_length = smb2_read_data_length,
3098 .map_error = map_smb2_to_linux_error,
093b2bda
PS		 3099 .find_mid = smb2_find_mid,
3100 .check_message = smb2_check_message,
3101 .dump_detail = smb2_dump_detail,
d60622eb
PS		 3102 .clear_stats = smb2_clear_stats,
3103 .print_stats = smb2_print_stats,
983c88a4 3104 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 3105 .handle_cancelled_mid = smb2_handle_cancelled_mid,
c11f1df5 3106 .downgrade_oplock = smb2_downgrade_oplock,
ec2e4523
PS		 3107 .need_neg = smb2_need_neg,
3108 .negotiate = smb2_negotiate,
3a3bab50
PS		 3109 .negotiate_wsize = smb2_negotiate_wsize,
3110 .negotiate_rsize = smb2_negotiate_rsize,
5478f9ba
PS		 3111 .sess_setup = SMB2_sess_setup,
3112 .logoff = SMB2_logoff,
faaf946a
PS		 3113 .tree_connect = SMB2_tcon,
3114 .tree_disconnect = SMB2_tdis,
34f62640 3115 .qfs_tcon = smb2_qfs_tcon,
2503a0db 3116 .is_path_accessible = smb2_is_path_accessible,
9094fad1
PS		 3117 .can_echo = smb2_can_echo,
3118 .echo = SMB2_echo,
be4cb9e3
PS		 3119 .query_path_info = smb2_query_path_info,
3120 .get_srv_inum = smb2_get_srv_inum,
b7546bc5 3121 .query_file_info = smb2_query_file_info,
c839ff24
PS		 3122 .set_path_size = smb2_set_path_size,
3123 .set_file_size = smb2_set_file_size,
1feeaac7 3124 .set_file_info = smb2_set_file_info,
64a5cfa6 3125 .set_compression = smb2_set_compression,
a0e73183
PS		 3126 .mkdir = smb2_mkdir,
3127 .mkdir_setinfo = smb2_mkdir_setinfo,
1a500f01 3128 .rmdir = smb2_rmdir,
cbe6f439 3129 .unlink = smb2_unlink,
35143eb5 3130 .rename = smb2_rename_path,
568798cc 3131 .create_hardlink = smb2_create_hardlink,
b42bf888 3132 .query_symlink = smb2_query_symlink,
5b23c97d
SP		 3133 .query_mf_symlink = smb3_query_mf_symlink,
3134 .create_mf_symlink = smb3_create_mf_symlink,
f0df737e
PS		 3135 .open = smb2_open_file,
3136 .set_fid = smb2_set_fid,
3137 .close = smb2_close_file,
7a5cfb19 3138 .flush = smb2_flush_file,
09a4707e 3139 .async_readv = smb2_async_readv,
33319141 3140 .async_writev = smb2_async_writev,
d8e05039 3141 .sync_read = smb2_sync_read,
009d3443 3142 .sync_write = smb2_sync_write,
d324f08d
PS		 3143 .query_dir_first = smb2_query_dir_first,
3144 .query_dir_next = smb2_query_dir_next,
3145 .close_dir = smb2_close_dir,
3146 .calc_smb_size = smb2_calc_size,
2e44b288 3147 .is_status_pending = smb2_is_status_pending,
511c54a2 3148 .is_session_expired = smb2_is_session_expired,
983c88a4 3149 .oplock_response = smb2_oplock_response,
6fc05c25 3150 .queryfs = smb2_queryfs,
f7ba7fe6
PS		 3151 .mand_lock = smb2_mand_lock,
3152 .mand_unlock_range = smb2_unlock_range,
b140799a 3153 .push_mand_locks = smb2_push_mandatory_locks,
b8c32dbb
PS		 3154 .get_lease_key = smb2_get_lease_key,
3155 .set_lease_key = smb2_set_lease_key,
3156 .new_lease_key = smb2_new_lease_key,
38107d45 3157 .calc_signature = smb2_calc_signature,
53ef1016
PS		 3158 .is_read_op = smb2_is_read_op,
3159 .set_oplock_level = smb2_set_oplock_level,
a41a28bd 3160 .create_lease_buf = smb2_create_lease_buf,
b5c7cde3 3161 .parse_lease_buf = smb2_parse_lease_buf,
312bbc59 3162 .copychunk_range = smb2_copychunk_range,
7f6c5008 3163 .wp_retry_size = smb2_wp_retry_size,
52755808 3164 .dir_needs_close = smb2_dir_needs_close,
9d49640a 3165 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 3166 .select_sectype = smb2_select_sectype,
95907fea
RS		 3167#ifdef CONFIG_CIFS_XATTR
3168 .query_all_EAs = smb2_query_eas,
5517554e 3169 .set_EA = smb2_set_ea,
95907fea 3170#endif /* CIFS_XATTR */
2f1afe25
SP		 3171#ifdef CONFIG_CIFS_ACL
3172 .get_acl = get_smb2_acl,
3173 .get_acl_by_fid = get_smb2_acl_by_fid,
366ed846 3174 .set_acl = set_smb2_acl,
2f1afe25 3175#endif /* CIFS_ACL */
8ce79ec3 3176 .next_header = smb2_next_header,
38107d45
SF		 3177};
3178
53ef1016
PS		 3179struct smb_version_operations smb21_operations = {
3180 .compare_fids = smb2_compare_fids,
3181 .setup_request = smb2_setup_request,
3182 .setup_async_request = smb2_setup_async_request,
3183 .check_receive = smb2_check_receive,
3184 .add_credits = smb2_add_credits,
3185 .set_credits = smb2_set_credits,
3186 .get_credits_field = smb2_get_credits_field,
3187 .get_credits = smb2_get_credits,
cb7e9eab 3188 .wait_mtu_credits = smb2_wait_mtu_credits,
53ef1016
PS		 3189 .get_next_mid = smb2_get_next_mid,
3190 .read_data_offset = smb2_read_data_offset,
3191 .read_data_length = smb2_read_data_length,
3192 .map_error = map_smb2_to_linux_error,
3193 .find_mid = smb2_find_mid,
3194 .check_message = smb2_check_message,
3195 .dump_detail = smb2_dump_detail,
3196 .clear_stats = smb2_clear_stats,
3197 .print_stats = smb2_print_stats,
3198 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 3199 .handle_cancelled_mid = smb2_handle_cancelled_mid,
c11f1df5 3200 .downgrade_oplock = smb2_downgrade_oplock,
53ef1016
PS		 3201 .need_neg = smb2_need_neg,
3202 .negotiate = smb2_negotiate,
3203 .negotiate_wsize = smb2_negotiate_wsize,
3204 .negotiate_rsize = smb2_negotiate_rsize,
3205 .sess_setup = SMB2_sess_setup,
3206 .logoff = SMB2_logoff,
3207 .tree_connect = SMB2_tcon,
3208 .tree_disconnect = SMB2_tdis,
34f62640 3209 .qfs_tcon = smb2_qfs_tcon,
53ef1016
PS		 3210 .is_path_accessible = smb2_is_path_accessible,
3211 .can_echo = smb2_can_echo,
3212 .echo = SMB2_echo,
3213 .query_path_info = smb2_query_path_info,
3214 .get_srv_inum = smb2_get_srv_inum,
3215 .query_file_info = smb2_query_file_info,
3216 .set_path_size = smb2_set_path_size,
3217 .set_file_size = smb2_set_file_size,
3218 .set_file_info = smb2_set_file_info,
64a5cfa6 3219 .set_compression = smb2_set_compression,
53ef1016
PS		 3220 .mkdir = smb2_mkdir,
3221 .mkdir_setinfo = smb2_mkdir_setinfo,
3222 .rmdir = smb2_rmdir,
3223 .unlink = smb2_unlink,
3224 .rename = smb2_rename_path,
3225 .create_hardlink = smb2_create_hardlink,
3226 .query_symlink = smb2_query_symlink,
c22870ea 3227 .query_mf_symlink = smb3_query_mf_symlink,
5ab97578 3228 .create_mf_symlink = smb3_create_mf_symlink,
53ef1016
PS		 3229 .open = smb2_open_file,
3230 .set_fid = smb2_set_fid,
3231 .close = smb2_close_file,
3232 .flush = smb2_flush_file,
3233 .async_readv = smb2_async_readv,
3234 .async_writev = smb2_async_writev,
3235 .sync_read = smb2_sync_read,
3236 .sync_write = smb2_sync_write,
3237 .query_dir_first = smb2_query_dir_first,
3238 .query_dir_next = smb2_query_dir_next,
3239 .close_dir = smb2_close_dir,
3240 .calc_smb_size = smb2_calc_size,
3241 .is_status_pending = smb2_is_status_pending,
511c54a2 3242 .is_session_expired = smb2_is_session_expired,
53ef1016
PS		 3243 .oplock_response = smb2_oplock_response,
3244 .queryfs = smb2_queryfs,
3245 .mand_lock = smb2_mand_lock,
3246 .mand_unlock_range = smb2_unlock_range,
3247 .push_mand_locks = smb2_push_mandatory_locks,
3248 .get_lease_key = smb2_get_lease_key,
3249 .set_lease_key = smb2_set_lease_key,
3250 .new_lease_key = smb2_new_lease_key,
3251 .calc_signature = smb2_calc_signature,
3252 .is_read_op = smb21_is_read_op,
3253 .set_oplock_level = smb21_set_oplock_level,
a41a28bd 3254 .create_lease_buf = smb2_create_lease_buf,
b5c7cde3 3255 .parse_lease_buf = smb2_parse_lease_buf,
312bbc59 3256 .copychunk_range = smb2_copychunk_range,
7f6c5008 3257 .wp_retry_size = smb2_wp_retry_size,
52755808 3258 .dir_needs_close = smb2_dir_needs_close,
834170c8 3259 .enum_snapshots = smb3_enum_snapshots,
9d49640a 3260 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 3261 .select_sectype = smb2_select_sectype,
95907fea
RS		 3262#ifdef CONFIG_CIFS_XATTR
3263 .query_all_EAs = smb2_query_eas,
5517554e 3264 .set_EA = smb2_set_ea,
95907fea 3265#endif /* CIFS_XATTR */
2f1afe25
SP		 3266#ifdef CONFIG_CIFS_ACL
3267 .get_acl = get_smb2_acl,
3268 .get_acl_by_fid = get_smb2_acl_by_fid,
366ed846 3269 .set_acl = set_smb2_acl,
2f1afe25 3270#endif /* CIFS_ACL */
8ce79ec3 3271 .next_header = smb2_next_header,
53ef1016 3272};
38107d45
SF		 3273
3274struct smb_version_operations smb30_operations = {
3275 .compare_fids = smb2_compare_fids,
3276 .setup_request = smb2_setup_request,
3277 .setup_async_request = smb2_setup_async_request,
3278 .check_receive = smb2_check_receive,
3279 .add_credits = smb2_add_credits,
3280 .set_credits = smb2_set_credits,
3281 .get_credits_field = smb2_get_credits_field,
3282 .get_credits = smb2_get_credits,
cb7e9eab 3283 .wait_mtu_credits = smb2_wait_mtu_credits,
38107d45
SF		 3284 .get_next_mid = smb2_get_next_mid,
3285 .read_data_offset = smb2_read_data_offset,
3286 .read_data_length = smb2_read_data_length,
3287 .map_error = map_smb2_to_linux_error,
3288 .find_mid = smb2_find_mid,
3289 .check_message = smb2_check_message,
3290 .dump_detail = smb2_dump_detail,
3291 .clear_stats = smb2_clear_stats,
3292 .print_stats = smb2_print_stats,
769ee6a4 3293 .dump_share_caps = smb2_dump_share_caps,
38107d45 3294 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 3295 .handle_cancelled_mid = smb2_handle_cancelled_mid,
c11f1df5 3296 .downgrade_oplock = smb2_downgrade_oplock,
38107d45
SF		 3297 .need_neg = smb2_need_neg,
3298 .negotiate = smb2_negotiate,
3299 .negotiate_wsize = smb2_negotiate_wsize,
3300 .negotiate_rsize = smb2_negotiate_rsize,
3301 .sess_setup = SMB2_sess_setup,
3302 .logoff = SMB2_logoff,
3303 .tree_connect = SMB2_tcon,
3304 .tree_disconnect = SMB2_tdis,
af6a12ea 3305 .qfs_tcon = smb3_qfs_tcon,
38107d45
SF		 3306 .is_path_accessible = smb2_is_path_accessible,
3307 .can_echo = smb2_can_echo,
3308 .echo = SMB2_echo,
3309 .query_path_info = smb2_query_path_info,
3310 .get_srv_inum = smb2_get_srv_inum,
3311 .query_file_info = smb2_query_file_info,
3312 .set_path_size = smb2_set_path_size,
3313 .set_file_size = smb2_set_file_size,
3314 .set_file_info = smb2_set_file_info,
64a5cfa6 3315 .set_compression = smb2_set_compression,
38107d45
SF		 3316 .mkdir = smb2_mkdir,
3317 .mkdir_setinfo = smb2_mkdir_setinfo,
3318 .rmdir = smb2_rmdir,
3319 .unlink = smb2_unlink,
3320 .rename = smb2_rename_path,
3321 .create_hardlink = smb2_create_hardlink,
b42bf888 3322 .query_symlink = smb2_query_symlink,
c22870ea 3323 .query_mf_symlink = smb3_query_mf_symlink,
5ab97578 3324 .create_mf_symlink = smb3_create_mf_symlink,
38107d45
SF		 3325 .open = smb2_open_file,
3326 .set_fid = smb2_set_fid,
3327 .close = smb2_close_file,
3328 .flush = smb2_flush_file,
3329 .async_readv = smb2_async_readv,
3330 .async_writev = smb2_async_writev,
3331 .sync_read = smb2_sync_read,
3332 .sync_write = smb2_sync_write,
3333 .query_dir_first = smb2_query_dir_first,
3334 .query_dir_next = smb2_query_dir_next,
3335 .close_dir = smb2_close_dir,
3336 .calc_smb_size = smb2_calc_size,
3337 .is_status_pending = smb2_is_status_pending,
511c54a2 3338 .is_session_expired = smb2_is_session_expired,
38107d45
SF		 3339 .oplock_response = smb2_oplock_response,
3340 .queryfs = smb2_queryfs,
3341 .mand_lock = smb2_mand_lock,
3342 .mand_unlock_range = smb2_unlock_range,
3343 .push_mand_locks = smb2_push_mandatory_locks,
3344 .get_lease_key = smb2_get_lease_key,
3345 .set_lease_key = smb2_set_lease_key,
3346 .new_lease_key = smb2_new_lease_key,
373512ec 3347 .generate_signingkey = generate_smb30signingkey,
38107d45 3348 .calc_signature = smb3_calc_signature,
b3152e2c 3349 .set_integrity = smb3_set_integrity,
53ef1016 3350 .is_read_op = smb21_is_read_op,
42873b0a 3351 .set_oplock_level = smb3_set_oplock_level,
f047390a
PS		 3352 .create_lease_buf = smb3_create_lease_buf,
3353 .parse_lease_buf = smb3_parse_lease_buf,
312bbc59 3354 .copychunk_range = smb2_copychunk_range,
ca9e7a1c 3355 .duplicate_extents = smb2_duplicate_extents,
ff1c038a 3356 .validate_negotiate = smb3_validate_negotiate,
7f6c5008 3357 .wp_retry_size = smb2_wp_retry_size,
52755808 3358 .dir_needs_close = smb2_dir_needs_close,
31742c5a 3359 .fallocate = smb3_fallocate,
834170c8 3360 .enum_snapshots = smb3_enum_snapshots,
026e93dc 3361 .init_transform_rq = smb3_init_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 */
2f1afe25
SP		 3370#ifdef CONFIG_CIFS_ACL
3371 .get_acl = get_smb2_acl,
3372 .get_acl_by_fid = get_smb2_acl_by_fid,
366ed846 3373 .set_acl = set_smb2_acl,
2f1afe25 3374#endif /* CIFS_ACL */
8ce79ec3 3375 .next_header = smb2_next_header,
1080ef75
SF		 3376};
3377
aab1893d
SF		 3378struct smb_version_operations smb311_operations = {
3379 .compare_fids = smb2_compare_fids,
3380 .setup_request = smb2_setup_request,
3381 .setup_async_request = smb2_setup_async_request,
3382 .check_receive = smb2_check_receive,
3383 .add_credits = smb2_add_credits,
3384 .set_credits = smb2_set_credits,
3385 .get_credits_field = smb2_get_credits_field,
3386 .get_credits = smb2_get_credits,
3387 .wait_mtu_credits = smb2_wait_mtu_credits,
3388 .get_next_mid = smb2_get_next_mid,
3389 .read_data_offset = smb2_read_data_offset,
3390 .read_data_length = smb2_read_data_length,
3391 .map_error = map_smb2_to_linux_error,
3392 .find_mid = smb2_find_mid,
3393 .check_message = smb2_check_message,
3394 .dump_detail = smb2_dump_detail,
3395 .clear_stats = smb2_clear_stats,
3396 .print_stats = smb2_print_stats,
3397 .dump_share_caps = smb2_dump_share_caps,
3398 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 3399 .handle_cancelled_mid = smb2_handle_cancelled_mid,
aab1893d
SF		 3400 .downgrade_oplock = smb2_downgrade_oplock,
3401 .need_neg = smb2_need_neg,
3402 .negotiate = smb2_negotiate,
3403 .negotiate_wsize = smb2_negotiate_wsize,
3404 .negotiate_rsize = smb2_negotiate_rsize,
3405 .sess_setup = SMB2_sess_setup,
3406 .logoff = SMB2_logoff,
3407 .tree_connect = SMB2_tcon,
3408 .tree_disconnect = SMB2_tdis,
3409 .qfs_tcon = smb3_qfs_tcon,
3410 .is_path_accessible = smb2_is_path_accessible,
3411 .can_echo = smb2_can_echo,
3412 .echo = SMB2_echo,
3413 .query_path_info = smb2_query_path_info,
3414 .get_srv_inum = smb2_get_srv_inum,
3415 .query_file_info = smb2_query_file_info,
3416 .set_path_size = smb2_set_path_size,
3417 .set_file_size = smb2_set_file_size,
3418 .set_file_info = smb2_set_file_info,
3419 .set_compression = smb2_set_compression,
3420 .mkdir = smb2_mkdir,
3421 .mkdir_setinfo = smb2_mkdir_setinfo,
bea851b8 3422 .posix_mkdir = smb311_posix_mkdir,
aab1893d
SF		 3423 .rmdir = smb2_rmdir,
3424 .unlink = smb2_unlink,
3425 .rename = smb2_rename_path,
3426 .create_hardlink = smb2_create_hardlink,
3427 .query_symlink = smb2_query_symlink,
3428 .query_mf_symlink = smb3_query_mf_symlink,
3429 .create_mf_symlink = smb3_create_mf_symlink,
3430 .open = smb2_open_file,
3431 .set_fid = smb2_set_fid,
3432 .close = smb2_close_file,
3433 .flush = smb2_flush_file,
3434 .async_readv = smb2_async_readv,
3435 .async_writev = smb2_async_writev,
3436 .sync_read = smb2_sync_read,
3437 .sync_write = smb2_sync_write,
3438 .query_dir_first = smb2_query_dir_first,
3439 .query_dir_next = smb2_query_dir_next,
3440 .close_dir = smb2_close_dir,
3441 .calc_smb_size = smb2_calc_size,
3442 .is_status_pending = smb2_is_status_pending,
511c54a2 3443 .is_session_expired = smb2_is_session_expired,
aab1893d 3444 .oplock_response = smb2_oplock_response,
2d304217 3445 .queryfs = smb311_queryfs,
aab1893d
SF		 3446 .mand_lock = smb2_mand_lock,
3447 .mand_unlock_range = smb2_unlock_range,
3448 .push_mand_locks = smb2_push_mandatory_locks,
3449 .get_lease_key = smb2_get_lease_key,
3450 .set_lease_key = smb2_set_lease_key,
3451 .new_lease_key = smb2_new_lease_key,
373512ec 3452 .generate_signingkey = generate_smb311signingkey,
aab1893d 3453 .calc_signature = smb3_calc_signature,
b3152e2c 3454 .set_integrity = smb3_set_integrity,
aab1893d
SF		 3455 .is_read_op = smb21_is_read_op,
3456 .set_oplock_level = smb3_set_oplock_level,
3457 .create_lease_buf = smb3_create_lease_buf,
3458 .parse_lease_buf = smb3_parse_lease_buf,
312bbc59 3459 .copychunk_range = smb2_copychunk_range,
02b16665 3460 .duplicate_extents = smb2_duplicate_extents,
aab1893d
SF		 3461/* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
3462 .wp_retry_size = smb2_wp_retry_size,
3463 .dir_needs_close = smb2_dir_needs_close,
3464 .fallocate = smb3_fallocate,
834170c8 3465 .enum_snapshots = smb3_enum_snapshots,
026e93dc 3466 .init_transform_rq = smb3_init_transform_rq,
4326ed2f
PS		 3467 .is_transform_hdr = smb3_is_transform_hdr,
3468 .receive_transform = smb3_receive_transform,
9d49640a 3469 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 3470 .select_sectype = smb2_select_sectype,
95907fea
RS		 3471#ifdef CONFIG_CIFS_XATTR
3472 .query_all_EAs = smb2_query_eas,
5517554e 3473 .set_EA = smb2_set_ea,
95907fea 3474#endif /* CIFS_XATTR */
8ce79ec3 3475 .next_header = smb2_next_header,
aab1893d 3476};
aab1893d 3477
dd446b16
SF		 3478struct smb_version_values smb20_values = {
3479 .version_string = SMB20_VERSION_STRING,
3480 .protocol_id = SMB20_PROT_ID,
3481 .req_capabilities = 0, /* MBZ */
3482 .large_lock_type = 0,
3483 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3484 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3485 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3486 .header_size = sizeof(struct smb2_sync_hdr),
3487 .header_preamble_size = 0,
dd446b16
SF		 3488 .max_header_size = MAX_SMB2_HDR_SIZE,
3489 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3490 .lock_cmd = SMB2_LOCK,
3491 .cap_unix = 0,
3492 .cap_nt_find = SMB2_NT_FIND,
3493 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 3494 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3495 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
a41a28bd 3496 .create_lease_size = sizeof(struct create_lease),
dd446b16
SF		 3497};
3498
1080ef75
SF		 3499struct smb_version_values smb21_values = {
3500 .version_string = SMB21_VERSION_STRING,
e4aa25e7
SF		 3501 .protocol_id = SMB21_PROT_ID,
3502 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
3503 .large_lock_type = 0,
3504 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3505 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3506 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3507 .header_size = sizeof(struct smb2_sync_hdr),
3508 .header_preamble_size = 0,
e4aa25e7
SF		 3509 .max_header_size = MAX_SMB2_HDR_SIZE,
3510 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3511 .lock_cmd = SMB2_LOCK,
3512 .cap_unix = 0,
3513 .cap_nt_find = SMB2_NT_FIND,
3514 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 3515 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3516 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
a41a28bd 3517 .create_lease_size = sizeof(struct create_lease),
e4aa25e7
SF		 3518};
3519
9764c02f
SF		 3520struct smb_version_values smb3any_values = {
3521 .version_string = SMB3ANY_VERSION_STRING,
3522 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3523 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3524 .large_lock_type = 0,
3525 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3526 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3527 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3528 .header_size = sizeof(struct smb2_sync_hdr),
3529 .header_preamble_size = 0,
9764c02f
SF		 3530 .max_header_size = MAX_SMB2_HDR_SIZE,
3531 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3532 .lock_cmd = SMB2_LOCK,
3533 .cap_unix = 0,
3534 .cap_nt_find = SMB2_NT_FIND,
3535 .cap_large_files = SMB2_LARGE_FILES,
3536 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3537 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3538 .create_lease_size = sizeof(struct create_lease_v2),
3539};
3540
3541struct smb_version_values smbdefault_values = {
3542 .version_string = SMBDEFAULT_VERSION_STRING,
3543 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3544 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3545 .large_lock_type = 0,
3546 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3547 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3548 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3549 .header_size = sizeof(struct smb2_sync_hdr),
3550 .header_preamble_size = 0,
9764c02f
SF		 3551 .max_header_size = MAX_SMB2_HDR_SIZE,
3552 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3553 .lock_cmd = SMB2_LOCK,
3554 .cap_unix = 0,
3555 .cap_nt_find = SMB2_NT_FIND,
3556 .cap_large_files = SMB2_LARGE_FILES,
3557 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3558 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3559 .create_lease_size = sizeof(struct create_lease_v2),
3560};
3561
e4aa25e7
SF		 3562struct smb_version_values smb30_values = {
3563 .version_string = SMB30_VERSION_STRING,
3564 .protocol_id = SMB30_PROT_ID,
373512ec 3565 .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		 3566 .large_lock_type = 0,
3567 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3568 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3569 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3570 .header_size = sizeof(struct smb2_sync_hdr),
3571 .header_preamble_size = 0,
093b2bda 3572 .max_header_size = MAX_SMB2_HDR_SIZE,
09a4707e 3573 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2dc7e1c0 3574 .lock_cmd = SMB2_LOCK,
29e20f9c
PS		 3575 .cap_unix = 0,
3576 .cap_nt_find = SMB2_NT_FIND,
3577 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 3578 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3579 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
f047390a 3580 .create_lease_size = sizeof(struct create_lease_v2),
1080ef75 3581};
20b6d8b4
SF		 3582
3583struct smb_version_values smb302_values = {
3584 .version_string = SMB302_VERSION_STRING,
3585 .protocol_id = SMB302_PROT_ID,
373512ec 3586 .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		 3587 .large_lock_type = 0,
3588 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3589 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3590 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3591 .header_size = sizeof(struct smb2_sync_hdr),
3592 .header_preamble_size = 0,
20b6d8b4
SF		 3593 .max_header_size = MAX_SMB2_HDR_SIZE,
3594 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3595 .lock_cmd = SMB2_LOCK,
3596 .cap_unix = 0,
3597 .cap_nt_find = SMB2_NT_FIND,
3598 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 3599 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3600 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
f047390a 3601 .create_lease_size = sizeof(struct create_lease_v2),
20b6d8b4 3602};
5f7fbf73 3603
5f7fbf73
SF		 3604struct smb_version_values smb311_values = {
3605 .version_string = SMB311_VERSION_STRING,
3606 .protocol_id = SMB311_PROT_ID,
1955880b 3607 .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		 3608 .large_lock_type = 0,
3609 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3610 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3611 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3612 .header_size = sizeof(struct smb2_sync_hdr),
3613 .header_preamble_size = 0,
5f7fbf73
SF		 3614 .max_header_size = MAX_SMB2_HDR_SIZE,
3615 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3616 .lock_cmd = SMB2_LOCK,
3617 .cap_unix = 0,
3618 .cap_nt_find = SMB2_NT_FIND,
3619 .cap_large_files = SMB2_LARGE_FILES,
3620 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3621 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3622 .create_lease_size = sizeof(struct create_lease_v2),
3623};
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