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Merge tag 'f2fs-for-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk...
[linux-2.6-block.git] / fs / cifs / smb2ops.c
CommitLineData
1080ef75
SF		 1/*
2 * SMB2 version specific operations
3 *
4 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
5 *
6 * This library is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License v2 as published
8 * by the Free Software Foundation.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public License
16 * along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
3a3bab50 20#include <linux/pagemap.h>
6fc05c25 21#include <linux/vfs.h>
f29ebb47 22#include <linux/falloc.h>
026e93dc 23#include <linux/scatterlist.h>
4fa8e504 24#include <linux/uuid.h>
026e93dc 25#include <crypto/aead.h>
1080ef75 26#include "cifsglob.h"
2dc7e1c0
PS		 27#include "smb2pdu.h"
28#include "smb2proto.h"
28ea5290
PS		 29#include "cifsproto.h"
30#include "cifs_debug.h"
b42bf888 31#include "cifs_unicode.h"
2e44b288 32#include "smb2status.h"
6fc05c25 33#include "smb2glob.h"
834170c8 34#include "cifs_ioctl.h"
09902f8d 35#include "smbdirect.h"
28ea5290
PS		 36
37static int
38change_conf(struct TCP_Server_Info *server)
39{
40 server->credits += server->echo_credits + server->oplock_credits;
41 server->oplock_credits = server->echo_credits = 0;
42 switch (server->credits) {
43 case 0:
44 return -1;
45 case 1:
46 server->echoes = false;
47 server->oplocks = false;
f96637be 48 cifs_dbg(VFS, "disabling echoes and oplocks\n");
28ea5290
PS		 49 break;
50 case 2:
51 server->echoes = true;
52 server->oplocks = false;
53 server->echo_credits = 1;
f96637be 54 cifs_dbg(FYI, "disabling oplocks\n");
28ea5290
PS		 55 break;
56 default:
57 server->echoes = true;
e0ddde9d
SF		 58 if (enable_oplocks) {
59 server->oplocks = true;
60 server->oplock_credits = 1;
61 } else
62 server->oplocks = false;
63
28ea5290 64 server->echo_credits = 1;
28ea5290
PS		 65 }
66 server->credits -= server->echo_credits + server->oplock_credits;
67 return 0;
68}
69
70static void
71smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
72 const int optype)
73{
74 int *val, rc = 0;
75 spin_lock(&server->req_lock);
76 val = server->ops->get_credits_field(server, optype);
b340a4d4
SF		 77
78 /* eg found case where write overlapping reconnect messed up credits */
79 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
80 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
81 server->hostname, *val);
82
28ea5290 83 *val += add;
141891f4
SF		 84 if (*val > 65000) {
85 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
86 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
87 }
28ea5290 88 server->in_flight--;
ec2e4523 89 if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
28ea5290 90 rc = change_conf(server);
983c88a4
PS		 91 /*
92 * Sometimes server returns 0 credits on oplock break ack - we need to
93 * rebalance credits in this case.
94 */
95 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
96 server->oplocks) {
97 if (server->credits > 1) {
98 server->credits--;
99 server->oplock_credits++;
100 }
101 }
28ea5290
PS		 102 spin_unlock(&server->req_lock);
103 wake_up(&server->request_q);
104 if (rc)
105 cifs_reconnect(server);
106}
107
108static void
109smb2_set_credits(struct TCP_Server_Info *server, const int val)
110{
111 spin_lock(&server->req_lock);
112 server->credits = val;
9e1a37da
SF		 113 if (val == 1)
114 server->reconnect_instance++;
28ea5290 115 spin_unlock(&server->req_lock);
6e4d3bbe
SF		 116 /* don't log while holding the lock */
117 if (val == 1)
118 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
28ea5290
PS		 119}
120
121static int *
122smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
123{
124 switch (optype) {
125 case CIFS_ECHO_OP:
126 return &server->echo_credits;
127 case CIFS_OBREAK_OP:
128 return &server->oplock_credits;
129 default:
130 return &server->credits;
131 }
132}
133
134static unsigned int
135smb2_get_credits(struct mid_q_entry *mid)
136{
49f466bd 137 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)mid->resp_buf;
31473fc4
PS		 138
139 return le16_to_cpu(shdr->CreditRequest);
28ea5290 140}
2dc7e1c0 141
cb7e9eab
PS		 142static int
143smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
144 unsigned int *num, unsigned int *credits)
145{
146 int rc = 0;
147 unsigned int scredits;
148
149 spin_lock(&server->req_lock);
150 while (1) {
151 if (server->credits <= 0) {
152 spin_unlock(&server->req_lock);
153 cifs_num_waiters_inc(server);
154 rc = wait_event_killable(server->request_q,
155 has_credits(server, &server->credits));
156 cifs_num_waiters_dec(server);
157 if (rc)
158 return rc;
159 spin_lock(&server->req_lock);
160 } else {
161 if (server->tcpStatus == CifsExiting) {
162 spin_unlock(&server->req_lock);
163 return -ENOENT;
164 }
165
166 scredits = server->credits;
167 /* can deadlock with reopen */
168 if (scredits == 1) {
169 *num = SMB2_MAX_BUFFER_SIZE;
170 *credits = 0;
171 break;
172 }
173
174 /* leave one credit for a possible reopen */
175 scredits--;
176 *num = min_t(unsigned int, size,
177 scredits * SMB2_MAX_BUFFER_SIZE);
178
179 *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
180 server->credits -= *credits;
181 server->in_flight++;
182 break;
183 }
184 }
185 spin_unlock(&server->req_lock);
186 return rc;
187}
188
2dc7e1c0
PS		 189static __u64
190smb2_get_next_mid(struct TCP_Server_Info *server)
191{
192 __u64 mid;
193 /* for SMB2 we need the current value */
194 spin_lock(&GlobalMid_Lock);
195 mid = server->CurrentMid++;
196 spin_unlock(&GlobalMid_Lock);
197 return mid;
198}
1080ef75 199
093b2bda
PS		 200static struct mid_q_entry *
201smb2_find_mid(struct TCP_Server_Info *server, char *buf)
202{
203 struct mid_q_entry *mid;
49f466bd 204 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
31473fc4 205 __u64 wire_mid = le64_to_cpu(shdr->MessageId);
093b2bda 206
31473fc4 207 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
373512ec
SF		 208 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
209 return NULL;
210 }
211
093b2bda
PS		 212 spin_lock(&GlobalMid_Lock);
213 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
9235d098 214 if ((mid->mid == wire_mid) &&
093b2bda 215 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
31473fc4 216 (mid->command == shdr->Command)) {
696e420b 217 kref_get(&mid->refcount);
093b2bda
PS		 218 spin_unlock(&GlobalMid_Lock);
219 return mid;
220 }
221 }
222 spin_unlock(&GlobalMid_Lock);
223 return NULL;
224}
225
226static void
14547f7d 227smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
093b2bda
PS		 228{
229#ifdef CONFIG_CIFS_DEBUG2
49f466bd 230 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
093b2bda 231
f96637be 232 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
31473fc4
PS		 233 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
234 shdr->ProcessId);
14547f7d 235 cifs_dbg(VFS, "smb buf %p len %u\n", buf,
71992e62 236 server->ops->calc_smb_size(buf, server));
093b2bda
PS		 237#endif
238}
239
ec2e4523
PS		 240static bool
241smb2_need_neg(struct TCP_Server_Info *server)
242{
243 return server->max_read == 0;
244}
245
246static int
247smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
248{
249 int rc;
250 ses->server->CurrentMid = 0;
251 rc = SMB2_negotiate(xid, ses);
252 /* BB we probably don't need to retry with modern servers */
253 if (rc == -EAGAIN)
254 rc = -EHOSTDOWN;
255 return rc;
256}
257
3a3bab50
PS		 258static unsigned int
259smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
260{
261 struct TCP_Server_Info *server = tcon->ses->server;
262 unsigned int wsize;
263
264 /* start with specified wsize, or default */
265 wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
266 wsize = min_t(unsigned int, wsize, server->max_write);
09902f8d 267#ifdef CONFIG_CIFS_SMB_DIRECT
bb4c0419
LL		 268 if (server->rdma) {
269 if (server->sign)
270 wsize = min_t(unsigned int,
271 wsize, server->smbd_conn->max_fragmented_send_size);
272 else
273 wsize = min_t(unsigned int,
09902f8d 274 wsize, server->smbd_conn->max_readwrite_size);
bb4c0419 275 }
09902f8d 276#endif
cb7e9eab
PS		 277 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
278 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
3a3bab50 279
3a3bab50
PS		 280 return wsize;
281}
282
3d621230
SF		 283static unsigned int
284smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
285{
286 struct TCP_Server_Info *server = tcon->ses->server;
287 unsigned int wsize;
288
289 /* start with specified wsize, or default */
290 wsize = volume_info->wsize ? volume_info->wsize : SMB3_DEFAULT_IOSIZE;
291 wsize = min_t(unsigned int, wsize, server->max_write);
292#ifdef CONFIG_CIFS_SMB_DIRECT
293 if (server->rdma) {
294 if (server->sign)
295 wsize = min_t(unsigned int,
296 wsize, server->smbd_conn->max_fragmented_send_size);
297 else
298 wsize = min_t(unsigned int,
299 wsize, server->smbd_conn->max_readwrite_size);
300 }
301#endif
302 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
303 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
304
305 return wsize;
306}
307
3a3bab50
PS		 308static unsigned int
309smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
310{
311 struct TCP_Server_Info *server = tcon->ses->server;
312 unsigned int rsize;
313
314 /* start with specified rsize, or default */
315 rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
316 rsize = min_t(unsigned int, rsize, server->max_read);
09902f8d 317#ifdef CONFIG_CIFS_SMB_DIRECT
bb4c0419
LL		 318 if (server->rdma) {
319 if (server->sign)
320 rsize = min_t(unsigned int,
321 rsize, server->smbd_conn->max_fragmented_recv_size);
322 else
323 rsize = min_t(unsigned int,
09902f8d 324 rsize, server->smbd_conn->max_readwrite_size);
bb4c0419 325 }
09902f8d 326#endif
bed9da02
PS		 327
328 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
329 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
3a3bab50 330
3a3bab50
PS		 331 return rsize;
332}
333
3d621230
SF		 334static unsigned int
335smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
336{
337 struct TCP_Server_Info *server = tcon->ses->server;
338 unsigned int rsize;
339
340 /* start with specified rsize, or default */
341 rsize = volume_info->rsize ? volume_info->rsize : SMB3_DEFAULT_IOSIZE;
342 rsize = min_t(unsigned int, rsize, server->max_read);
343#ifdef CONFIG_CIFS_SMB_DIRECT
344 if (server->rdma) {
345 if (server->sign)
346 rsize = min_t(unsigned int,
347 rsize, server->smbd_conn->max_fragmented_recv_size);
348 else
349 rsize = min_t(unsigned int,
350 rsize, server->smbd_conn->max_readwrite_size);
351 }
352#endif
353
354 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
355 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
356
357 return rsize;
358}
fe856be4
AA		 359
360static int
361parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
362 size_t buf_len,
363 struct cifs_server_iface **iface_list,
364 size_t *iface_count)
365{
366 struct network_interface_info_ioctl_rsp *p;
367 struct sockaddr_in *addr4;
368 struct sockaddr_in6 *addr6;
369 struct iface_info_ipv4 *p4;
370 struct iface_info_ipv6 *p6;
371 struct cifs_server_iface *info;
372 ssize_t bytes_left;
373 size_t next = 0;
374 int nb_iface = 0;
375 int rc = 0;
376
377 *iface_list = NULL;
378 *iface_count = 0;
379
380 /*
381 * Fist pass: count and sanity check
382 */
383
384 bytes_left = buf_len;
385 p = buf;
386 while (bytes_left >= sizeof(*p)) {
387 nb_iface++;
388 next = le32_to_cpu(p->Next);
389 if (!next) {
390 bytes_left -= sizeof(*p);
391 break;
392 }
393 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
394 bytes_left -= next;
395 }
396
397 if (!nb_iface) {
398 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
399 rc = -EINVAL;
400 goto out;
401 }
402
403 if (bytes_left || p->Next)
404 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
405
406
407 /*
408 * Second pass: extract info to internal structure
409 */
410
411 *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
412 if (!*iface_list) {
413 rc = -ENOMEM;
414 goto out;
415 }
416
417 info = *iface_list;
418 bytes_left = buf_len;
419 p = buf;
420 while (bytes_left >= sizeof(*p)) {
421 info->speed = le64_to_cpu(p->LinkSpeed);
422 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
423 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
424
425 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
426 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
427 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
428 le32_to_cpu(p->Capability));
429
430 switch (p->Family) {
431 /*
432 * The kernel and wire socket structures have the same
433 * layout and use network byte order but make the
434 * conversion explicit in case either one changes.
435 */
436 case INTERNETWORK:
437 addr4 = (struct sockaddr_in *)&info->sockaddr;
438 p4 = (struct iface_info_ipv4 *)p->Buffer;
439 addr4->sin_family = AF_INET;
440 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
441
442 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
443 addr4->sin_port = cpu_to_be16(CIFS_PORT);
444
445 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
446 &addr4->sin_addr);
447 break;
448 case INTERNETWORKV6:
449 addr6 = (struct sockaddr_in6 *)&info->sockaddr;
450 p6 = (struct iface_info_ipv6 *)p->Buffer;
451 addr6->sin6_family = AF_INET6;
452 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
453
454 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
455 addr6->sin6_flowinfo = 0;
456 addr6->sin6_scope_id = 0;
457 addr6->sin6_port = cpu_to_be16(CIFS_PORT);
458
459 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
460 &addr6->sin6_addr);
461 break;
462 default:
463 cifs_dbg(VFS,
464 "%s: skipping unsupported socket family\n",
465 __func__);
466 goto next_iface;
467 }
468
469 (*iface_count)++;
470 info++;
471next_iface:
472 next = le32_to_cpu(p->Next);
473 if (!next)
474 break;
475 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
476 bytes_left -= next;
477 }
478
479 if (!*iface_count) {
480 rc = -EINVAL;
481 goto out;
482 }
483
484out:
485 if (rc) {
486 kfree(*iface_list);
487 *iface_count = 0;
488 *iface_list = NULL;
489 }
490 return rc;
491}
492
493
c481e9fe
SF		 494static int
495SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
496{
497 int rc;
498 unsigned int ret_data_len = 0;
fe856be4
AA		 499 struct network_interface_info_ioctl_rsp *out_buf = NULL;
500 struct cifs_server_iface *iface_list;
501 size_t iface_count;
502 struct cifs_ses *ses = tcon->ses;
c481e9fe
SF		 503
504 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
505 FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
506 NULL /* no data input */, 0 /* no data input */,
507 (char **)&out_buf, &ret_data_len);
c3ed4402
SF		 508 if (rc == -EOPNOTSUPP) {
509 cifs_dbg(FYI,
510 "server does not support query network interfaces\n");
511 goto out;
512 } else if (rc != 0) {
9ffc5412 513 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
fe856be4 514 goto out;
9ffc5412 515 }
fe856be4
AA		 516
517 rc = parse_server_interfaces(out_buf, ret_data_len,
518 &iface_list, &iface_count);
519 if (rc)
520 goto out;
521
522 spin_lock(&ses->iface_lock);
523 kfree(ses->iface_list);
524 ses->iface_list = iface_list;
525 ses->iface_count = iface_count;
526 ses->iface_last_update = jiffies;
527 spin_unlock(&ses->iface_lock);
528
529out:
24df1483 530 kfree(out_buf);
c481e9fe
SF		 531 return rc;
532}
c481e9fe 533
9da6ec77
RS		 534static void
535smb2_close_cached_fid(struct kref *ref)
a93864d9 536{
9da6ec77
RS		 537 struct cached_fid *cfid = container_of(ref, struct cached_fid,
538 refcount);
539
a93864d9
RS		 540 if (cfid->is_valid) {
541 cifs_dbg(FYI, "clear cached root file handle\n");
542 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
543 cfid->fid->volatile_fid);
544 cfid->is_valid = false;
545 }
9da6ec77
RS		 546}
547
548void close_shroot(struct cached_fid *cfid)
549{
550 mutex_lock(&cfid->fid_mutex);
551 kref_put(&cfid->refcount, smb2_close_cached_fid);
a93864d9
RS		 552 mutex_unlock(&cfid->fid_mutex);
553}
554
9da6ec77
RS		 555void
556smb2_cached_lease_break(struct work_struct *work)
557{
558 struct cached_fid *cfid = container_of(work,
559 struct cached_fid, lease_break);
560
561 close_shroot(cfid);
562}
563
3d4ef9a1
SF		 564/*
565 * Open the directory at the root of a share
566 */
567int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
568{
569 struct cifs_open_parms oparams;
570 int rc;
571 __le16 srch_path = 0; /* Null - since an open of top of share */
a93864d9 572 u8 oplock = SMB2_OPLOCK_LEVEL_II;
3d4ef9a1 573
a93864d9
RS		 574 mutex_lock(&tcon->crfid.fid_mutex);
575 if (tcon->crfid.is_valid) {
3d4ef9a1 576 cifs_dbg(FYI, "found a cached root file handle\n");
a93864d9 577 memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
9da6ec77 578 kref_get(&tcon->crfid.refcount);
a93864d9 579 mutex_unlock(&tcon->crfid.fid_mutex);
3d4ef9a1
SF		 580 return 0;
581 }
582
583 oparams.tcon = tcon;
584 oparams.create_options = 0;
585 oparams.desired_access = FILE_READ_ATTRIBUTES;
586 oparams.disposition = FILE_OPEN;
587 oparams.fid = pfid;
588 oparams.reconnect = false;
589
9d874c36 590 rc = SMB2_open(xid, &oparams, &srch_path, &oplock, NULL, NULL, NULL);
3d4ef9a1 591 if (rc == 0) {
a93864d9
RS		 592 memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
593 tcon->crfid.tcon = tcon;
594 tcon->crfid.is_valid = true;
9da6ec77
RS		 595 kref_init(&tcon->crfid.refcount);
596 kref_get(&tcon->crfid.refcount);
3d4ef9a1 597 }
a93864d9 598 mutex_unlock(&tcon->crfid.fid_mutex);
3d4ef9a1
SF		 599 return rc;
600}
601
af6a12ea
SF		 602static void
603smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
604{
605 int rc;
606 __le16 srch_path = 0; /* Null - open root of share */
607 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
608 struct cifs_open_parms oparms;
609 struct cifs_fid fid;
3d4ef9a1 610 bool no_cached_open = tcon->nohandlecache;
af6a12ea
SF		 611
612 oparms.tcon = tcon;
613 oparms.desired_access = FILE_READ_ATTRIBUTES;
614 oparms.disposition = FILE_OPEN;
615 oparms.create_options = 0;
616 oparms.fid = &fid;
617 oparms.reconnect = false;
618
3d4ef9a1 619 if (no_cached_open)
9d874c36
RS		 620 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
621 NULL);
3d4ef9a1
SF		 622 else
623 rc = open_shroot(xid, tcon, &fid);
624
af6a12ea
SF		 625 if (rc)
626 return;
627
c481e9fe 628 SMB3_request_interfaces(xid, tcon);
c481e9fe 629
af6a12ea
SF		 630 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
631 FS_ATTRIBUTE_INFORMATION);
632 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
633 FS_DEVICE_INFORMATION);
21ba3845
SF		 634 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
635 FS_VOLUME_INFORMATION);
af6a12ea
SF		 636 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
637 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
3d4ef9a1
SF		 638 if (no_cached_open)
639 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
9da6ec77
RS		 640 else
641 close_shroot(&tcon->crfid);
642
af6a12ea
SF		 643 return;
644}
645
34f62640
SF		 646static void
647smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
648{
649 int rc;
650 __le16 srch_path = 0; /* Null - open root of share */
651 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
652 struct cifs_open_parms oparms;
653 struct cifs_fid fid;
654
655 oparms.tcon = tcon;
656 oparms.desired_access = FILE_READ_ATTRIBUTES;
657 oparms.disposition = FILE_OPEN;
658 oparms.create_options = 0;
659 oparms.fid = &fid;
660 oparms.reconnect = false;
661
9d874c36 662 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
34f62640
SF		 663 if (rc)
664 return;
665
2167114c
SF		 666 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
667 FS_ATTRIBUTE_INFORMATION);
668 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
669 FS_DEVICE_INFORMATION);
34f62640
SF		 670 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
671 return;
672}
673
2503a0db
PS		 674static int
675smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
676 struct cifs_sb_info *cifs_sb, const char *full_path)
677{
678 int rc;
2503a0db 679 __le16 *utf16_path;
2e44b288 680 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
064f6047
PS		 681 struct cifs_open_parms oparms;
682 struct cifs_fid fid;
2503a0db 683
a93864d9 684 if ((*full_path == 0) && tcon->crfid.is_valid)
3d4ef9a1
SF		 685 return 0;
686
2503a0db
PS		 687 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
688 if (!utf16_path)
689 return -ENOMEM;
690
064f6047
PS		 691 oparms.tcon = tcon;
692 oparms.desired_access = FILE_READ_ATTRIBUTES;
693 oparms.disposition = FILE_OPEN;
5e19697b
SF		 694 if (backup_cred(cifs_sb))
695 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
696 else
697 oparms.create_options = 0;
064f6047 698 oparms.fid = &fid;
9cbc0b73 699 oparms.reconnect = false;
064f6047 700
9d874c36 701 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2503a0db
PS		 702 if (rc) {
703 kfree(utf16_path);
704 return rc;
705 }
706
064f6047 707 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2503a0db
PS		 708 kfree(utf16_path);
709 return rc;
710}
711
be4cb9e3
PS		 712static int
713smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
714 struct cifs_sb_info *cifs_sb, const char *full_path,
715 u64 *uniqueid, FILE_ALL_INFO *data)
716{
717 *uniqueid = le64_to_cpu(data->IndexNumber);
718 return 0;
719}
720
b7546bc5
PS		 721static int
722smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
723 struct cifs_fid *fid, FILE_ALL_INFO *data)
724{
725 int rc;
726 struct smb2_file_all_info *smb2_data;
727
1bbe4997 728 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
b7546bc5
PS		 729 GFP_KERNEL);
730 if (smb2_data == NULL)
731 return -ENOMEM;
732
733 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
734 smb2_data);
735 if (!rc)
736 move_smb2_info_to_cifs(data, smb2_data);
737 kfree(smb2_data);
738 return rc;
739}
740
1368f155 741#ifdef CONFIG_CIFS_XATTR
95907fea
RS		 742static ssize_t
743move_smb2_ea_to_cifs(char *dst, size_t dst_size,
744 struct smb2_file_full_ea_info *src, size_t src_size,
745 const unsigned char *ea_name)
746{
747 int rc = 0;
748 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
749 char *name, *value;
0c5d6cb6 750 size_t buf_size = dst_size;
95907fea
RS		 751 size_t name_len, value_len, user_name_len;
752
753 while (src_size > 0) {
754 name = &src->ea_data[0];
755 name_len = (size_t)src->ea_name_length;
756 value = &src->ea_data[src->ea_name_length + 1];
757 value_len = (size_t)le16_to_cpu(src->ea_value_length);
758
759 if (name_len == 0) {
760 break;
761 }
762
763 if (src_size < 8 + name_len + 1 + value_len) {
764 cifs_dbg(FYI, "EA entry goes beyond length of list\n");
765 rc = -EIO;
766 goto out;
767 }
768
769 if (ea_name) {
770 if (ea_name_len == name_len &&
771 memcmp(ea_name, name, name_len) == 0) {
772 rc = value_len;
773 if (dst_size == 0)
774 goto out;
775 if (dst_size < value_len) {
776 rc = -ERANGE;
777 goto out;
778 }
779 memcpy(dst, value, value_len);
780 goto out;
781 }
782 } else {
783 /* 'user.' plus a terminating null */
784 user_name_len = 5 + 1 + name_len;
785
0c5d6cb6
RS		 786 if (buf_size == 0) {
787 /* skip copy - calc size only */
788 rc += user_name_len;
789 } else if (dst_size >= user_name_len) {
95907fea
RS		 790 dst_size -= user_name_len;
791 memcpy(dst, "user.", 5);
792 dst += 5;
793 memcpy(dst, src->ea_data, name_len);
794 dst += name_len;
795 *dst = 0;
796 ++dst;
0c5d6cb6 797 rc += user_name_len;
95907fea
RS		 798 } else {
799 /* stop before overrun buffer */
800 rc = -ERANGE;
801 break;
802 }
803 }
804
805 if (!src->next_entry_offset)
806 break;
807
808 if (src_size < le32_to_cpu(src->next_entry_offset)) {
809 /* stop before overrun buffer */
810 rc = -ERANGE;
811 break;
812 }
813 src_size -= le32_to_cpu(src->next_entry_offset);
814 src = (void *)((char *)src +
815 le32_to_cpu(src->next_entry_offset));
816 }
817
818 /* didn't find the named attribute */
819 if (ea_name)
820 rc = -ENODATA;
821
822out:
823 return (ssize_t)rc;
824}
825
826static ssize_t
827smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
828 const unsigned char *path, const unsigned char *ea_name,
829 char *ea_data, size_t buf_size,
830 struct cifs_sb_info *cifs_sb)
831{
832 int rc;
833 __le16 *utf16_path;
834 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
835 struct cifs_open_parms oparms;
836 struct cifs_fid fid;
837 struct smb2_file_full_ea_info *smb2_data;
7cb3def4 838 int ea_buf_size = SMB2_MIN_EA_BUF;
95907fea
RS		 839
840 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
841 if (!utf16_path)
842 return -ENOMEM;
843
844 oparms.tcon = tcon;
845 oparms.desired_access = FILE_READ_EA;
846 oparms.disposition = FILE_OPEN;
5e19697b
SF		 847 if (backup_cred(cifs_sb))
848 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
849 else
850 oparms.create_options = 0;
95907fea
RS		 851 oparms.fid = &fid;
852 oparms.reconnect = false;
853
9d874c36 854 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
95907fea
RS		 855 kfree(utf16_path);
856 if (rc) {
857 cifs_dbg(FYI, "open failed rc=%d\n", rc);
858 return rc;
859 }
860
7cb3def4
RS		 861 while (1) {
862 smb2_data = kzalloc(ea_buf_size, GFP_KERNEL);
863 if (smb2_data == NULL) {
864 SMB2_close(xid, tcon, fid.persistent_fid,
865 fid.volatile_fid);
866 return -ENOMEM;
867 }
868
869 rc = SMB2_query_eas(xid, tcon, fid.persistent_fid,
870 fid.volatile_fid,
871 ea_buf_size, smb2_data);
872
873 if (rc != -E2BIG)
874 break;
875
876 kfree(smb2_data);
877 ea_buf_size <<= 1;
878
879 if (ea_buf_size > SMB2_MAX_EA_BUF) {
880 cifs_dbg(VFS, "EA size is too large\n");
881 SMB2_close(xid, tcon, fid.persistent_fid,
882 fid.volatile_fid);
883 return -ENOMEM;
884 }
95907fea
RS		 885 }
886
95907fea
RS		 887 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
888
ae2cd7fb
PA		 889 /*
890 * If ea_name is NULL (listxattr) and there are no EAs, return 0 as it's
891 * not an error. Otherwise, the specified ea_name was not found.
892 */
95907fea
RS		 893 if (!rc)
894 rc = move_smb2_ea_to_cifs(ea_data, buf_size, smb2_data,
895 SMB2_MAX_EA_BUF, ea_name);
ae2cd7fb
PA		 896 else if (!ea_name && rc == -ENODATA)
897 rc = 0;
95907fea
RS		 898
899 kfree(smb2_data);
900 return rc;
901}
902
5517554e
RS		 903
904static int
905smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
906 const char *path, const char *ea_name, const void *ea_value,
907 const __u16 ea_value_len, const struct nls_table *nls_codepage,
908 struct cifs_sb_info *cifs_sb)
909{
910 int rc;
911 __le16 *utf16_path;
912 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
913 struct cifs_open_parms oparms;
914 struct cifs_fid fid;
915 struct smb2_file_full_ea_info *ea;
916 int ea_name_len = strlen(ea_name);
917 int len;
918
919 if (ea_name_len > 255)
920 return -EINVAL;
921
922 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
923 if (!utf16_path)
924 return -ENOMEM;
925
926 oparms.tcon = tcon;
927 oparms.desired_access = FILE_WRITE_EA;
928 oparms.disposition = FILE_OPEN;
5e19697b
SF		 929 if (backup_cred(cifs_sb))
930 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
931 else
932 oparms.create_options = 0;
5517554e
RS		 933 oparms.fid = &fid;
934 oparms.reconnect = false;
935
9d874c36 936 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
5517554e
RS		 937 kfree(utf16_path);
938 if (rc) {
939 cifs_dbg(FYI, "open failed rc=%d\n", rc);
940 return rc;
941 }
942
943 len = sizeof(ea) + ea_name_len + ea_value_len + 1;
944 ea = kzalloc(len, GFP_KERNEL);
945 if (ea == NULL) {
946 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
947 return -ENOMEM;
948 }
949
950 ea->ea_name_length = ea_name_len;
951 ea->ea_value_length = cpu_to_le16(ea_value_len);
952 memcpy(ea->ea_data, ea_name, ea_name_len + 1);
953 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
954
955 rc = SMB2_set_ea(xid, tcon, fid.persistent_fid, fid.volatile_fid, ea,
956 len);
6aa0c114
PA		 957 kfree(ea);
958
5517554e
RS		 959 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
960
961 return rc;
962}
1368f155 963#endif
5517554e 964
9094fad1
PS		 965static bool
966smb2_can_echo(struct TCP_Server_Info *server)
967{
968 return server->echoes;
969}
970
d60622eb
PS		 971static void
972smb2_clear_stats(struct cifs_tcon *tcon)
973{
d60622eb
PS		 974 int i;
975 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
976 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
977 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
978 }
d60622eb
PS		 979}
980
769ee6a4
SF		 981static void
982smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
983{
984 seq_puts(m, "\n\tShare Capabilities:");
985 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
986 seq_puts(m, " DFS,");
987 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
988 seq_puts(m, " CONTINUOUS AVAILABILITY,");
989 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
990 seq_puts(m, " SCALEOUT,");
991 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
992 seq_puts(m, " CLUSTER,");
993 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
994 seq_puts(m, " ASYMMETRIC,");
995 if (tcon->capabilities == 0)
996 seq_puts(m, " None");
af6a12ea
SF		 997 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
998 seq_puts(m, " Aligned,");
999 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1000 seq_puts(m, " Partition Aligned,");
1001 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1002 seq_puts(m, " SSD,");
1003 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1004 seq_puts(m, " TRIM-support,");
1005
769ee6a4 1006 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
e0386e44 1007 seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
af6a12ea
SF		 1008 if (tcon->perf_sector_size)
1009 seq_printf(m, "\tOptimal sector size: 0x%x",
1010 tcon->perf_sector_size);
e0386e44 1011 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
769ee6a4
SF		 1012}
1013
d60622eb
PS		 1014static void
1015smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1016{
d60622eb
PS		 1017 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1018 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1995d28f
SF		 1019
1020 /*
1021 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1022 * totals (requests sent) since those SMBs are per-session not per tcon
1023 */
52ce1ac4
SF		 1024 seq_printf(m, "\nBytes read: %llu Bytes written: %llu",
1025 (long long)(tcon->bytes_read),
1026 (long long)(tcon->bytes_written));
fae8044c
SF		 1027 seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1028 atomic_read(&tcon->num_local_opens),
1029 atomic_read(&tcon->num_remote_opens));
1995d28f 1030 seq_printf(m, "\nTreeConnects: %d total %d failed",
d60622eb
PS		 1031 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1032 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1995d28f 1033 seq_printf(m, "\nTreeDisconnects: %d total %d failed",
d60622eb
PS		 1034 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1035 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1995d28f 1036 seq_printf(m, "\nCreates: %d total %d failed",
d60622eb
PS		 1037 atomic_read(&sent[SMB2_CREATE_HE]),
1038 atomic_read(&failed[SMB2_CREATE_HE]));
1995d28f 1039 seq_printf(m, "\nCloses: %d total %d failed",
d60622eb
PS		 1040 atomic_read(&sent[SMB2_CLOSE_HE]),
1041 atomic_read(&failed[SMB2_CLOSE_HE]));
1995d28f 1042 seq_printf(m, "\nFlushes: %d total %d failed",
d60622eb
PS		 1043 atomic_read(&sent[SMB2_FLUSH_HE]),
1044 atomic_read(&failed[SMB2_FLUSH_HE]));
1995d28f 1045 seq_printf(m, "\nReads: %d total %d failed",
d60622eb
PS		 1046 atomic_read(&sent[SMB2_READ_HE]),
1047 atomic_read(&failed[SMB2_READ_HE]));
1995d28f 1048 seq_printf(m, "\nWrites: %d total %d failed",
d60622eb
PS		 1049 atomic_read(&sent[SMB2_WRITE_HE]),
1050 atomic_read(&failed[SMB2_WRITE_HE]));
1995d28f 1051 seq_printf(m, "\nLocks: %d total %d failed",
d60622eb
PS		 1052 atomic_read(&sent[SMB2_LOCK_HE]),
1053 atomic_read(&failed[SMB2_LOCK_HE]));
1995d28f 1054 seq_printf(m, "\nIOCTLs: %d total %d failed",
d60622eb
PS		 1055 atomic_read(&sent[SMB2_IOCTL_HE]),
1056 atomic_read(&failed[SMB2_IOCTL_HE]));
1995d28f 1057 seq_printf(m, "\nQueryDirectories: %d total %d failed",
d60622eb
PS		 1058 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1059 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1995d28f 1060 seq_printf(m, "\nChangeNotifies: %d total %d failed",
d60622eb
PS		 1061 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1062 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1995d28f 1063 seq_printf(m, "\nQueryInfos: %d total %d failed",
d60622eb
PS		 1064 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1065 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1995d28f 1066 seq_printf(m, "\nSetInfos: %d total %d failed",
d60622eb
PS		 1067 atomic_read(&sent[SMB2_SET_INFO_HE]),
1068 atomic_read(&failed[SMB2_SET_INFO_HE]));
1069 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1070 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1071 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
d60622eb
PS		 1072}
1073
f0df737e
PS		 1074static void
1075smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1076{
2b0143b5 1077 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
53ef1016
PS		 1078 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1079
f0df737e
PS		 1080 cfile->fid.persistent_fid = fid->persistent_fid;
1081 cfile->fid.volatile_fid = fid->volatile_fid;
dfe33f9a
SF		 1082#ifdef CONFIG_CIFS_DEBUG2
1083 cfile->fid.mid = fid->mid;
1084#endif /* CIFS_DEBUG2 */
42873b0a
PS		 1085 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1086 &fid->purge_cache);
18cceb6a 1087 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
94f87371 1088 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
f0df737e
PS		 1089}
1090
760ad0ca 1091static void
f0df737e
PS		 1092smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1093 struct cifs_fid *fid)
1094{
760ad0ca 1095 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
f0df737e
PS		 1096}
1097
41c1358e
SF		 1098static int
1099SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1100 u64 persistent_fid, u64 volatile_fid,
1101 struct copychunk_ioctl *pcchunk)
1102{
1103 int rc;
1104 unsigned int ret_data_len;
1105 struct resume_key_req *res_key;
1106
1107 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1108 FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1109 NULL, 0 /* no input */,
1110 (char **)&res_key, &ret_data_len);
1111
1112 if (rc) {
1113 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1114 goto req_res_key_exit;
1115 }
1116 if (ret_data_len < sizeof(struct resume_key_req)) {
1117 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
1118 rc = -EINVAL;
1119 goto req_res_key_exit;
1120 }
1121 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1122
1123req_res_key_exit:
1124 kfree(res_key);
1125 return rc;
1126}
1127
f5b05d62
RS		 1128static int
1129smb2_ioctl_query_info(const unsigned int xid,
8d8b26e5
RS		 1130 struct cifs_tcon *tcon,
1131 __le16 *path, int is_dir,
f5b05d62
RS		 1132 unsigned long p)
1133{
f5b05d62
RS		 1134 struct cifs_ses *ses = tcon->ses;
1135 char __user *arg = (char __user *)p;
1136 struct smb_query_info qi;
1137 struct smb_query_info __user *pqi;
1138 int rc = 0;
1139 int flags = 0;
f5b05d62 1140 struct smb2_query_info_rsp *rsp = NULL;
8d8b26e5
RS		 1141 void *buffer = NULL;
1142 struct smb_rqst rqst[3];
1143 int resp_buftype[3];
1144 struct kvec rsp_iov[3];
1145 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1146 struct cifs_open_parms oparms;
1147 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1148 struct cifs_fid fid;
1149 struct kvec qi_iov[1];
1150 struct kvec close_iov[1];
1151
1152 memset(rqst, 0, sizeof(rqst));
1153 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1154 memset(rsp_iov, 0, sizeof(rsp_iov));
f5b05d62
RS		 1155
1156 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
1157 return -EFAULT;
1158
1159 if (qi.output_buffer_length > 1024)
1160 return -EINVAL;
1161
1162 if (!ses || !(ses->server))
1163 return -EIO;
1164
1165 if (smb3_encryption_required(tcon))
1166 flags |= CIFS_TRANSFORM_REQ;
1167
1168 buffer = kmalloc(qi.output_buffer_length, GFP_KERNEL);
1169 if (buffer == NULL)
1170 return -ENOMEM;
1171
1172 if (copy_from_user(buffer, arg + sizeof(struct smb_query_info),
1173 qi.output_buffer_length)) {
8d8b26e5
RS		 1174 rc = -EFAULT;
1175 goto iqinf_exit;
f5b05d62
RS		 1176 }
1177
8d8b26e5
RS		 1178 /* Open */
1179 memset(&open_iov, 0, sizeof(open_iov));
1180 rqst[0].rq_iov = open_iov;
1181 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1182
1183 memset(&oparms, 0, sizeof(oparms));
1184 oparms.tcon = tcon;
1185 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1186 oparms.disposition = FILE_OPEN;
1187 if (is_dir)
1188 oparms.create_options = CREATE_NOT_FILE;
1189 else
1190 oparms.create_options = CREATE_NOT_DIR;
1191 oparms.fid = &fid;
1192 oparms.reconnect = false;
1193
1194 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, path);
1195 if (rc)
1196 goto iqinf_exit;
271b9c0c 1197 smb2_set_next_command(ses->server, &rqst[0], 0);
8d8b26e5
RS		 1198
1199 /* Query */
1200 memset(&qi_iov, 0, sizeof(qi_iov));
1201 rqst[1].rq_iov = qi_iov;
1202 rqst[1].rq_nvec = 1;
f5b05d62 1203
8d8b26e5 1204 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
f5b05d62
RS		 1205 qi.file_info_class, qi.info_type,
1206 qi.additional_information,
1207 qi.input_buffer_length,
1208 qi.output_buffer_length, buffer);
f5b05d62
RS		 1209 if (rc)
1210 goto iqinf_exit;
271b9c0c 1211 smb2_set_next_command(ses->server, &rqst[1], 0);
8d8b26e5
RS		 1212 smb2_set_related(&rqst[1]);
1213
1214 /* Close */
1215 memset(&close_iov, 0, sizeof(close_iov));
1216 rqst[2].rq_iov = close_iov;
1217 rqst[2].rq_nvec = 1;
f5b05d62 1218
8d8b26e5 1219 rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
f5b05d62
RS		 1220 if (rc)
1221 goto iqinf_exit;
8d8b26e5 1222 smb2_set_related(&rqst[2]);
f5b05d62 1223
8d8b26e5
RS		 1224 rc = compound_send_recv(xid, ses, flags, 3, rqst,
1225 resp_buftype, rsp_iov);
1226 if (rc)
1227 goto iqinf_exit;
f5b05d62 1228 pqi = (struct smb_query_info __user *)arg;
8d8b26e5 1229 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
f5b05d62
RS		 1230 if (le32_to_cpu(rsp->OutputBufferLength) < qi.input_buffer_length)
1231 qi.input_buffer_length = le32_to_cpu(rsp->OutputBufferLength);
1232 if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length,
1233 sizeof(qi.input_buffer_length))) {
1234 rc = -EFAULT;
1235 goto iqinf_exit;
1236 }
1237 if (copy_to_user(pqi + 1, rsp->Buffer, qi.input_buffer_length)) {
1238 rc = -EFAULT;
1239 goto iqinf_exit;
1240 }
1241
1242 iqinf_exit:
8d8b26e5
RS		 1243 kfree(buffer);
1244 SMB2_open_free(&rqst[0]);
1245 SMB2_query_info_free(&rqst[1]);
1246 SMB2_close_free(&rqst[2]);
1247 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1248 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1249 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
f5b05d62
RS		 1250 return rc;
1251}
1252
620d8745 1253static ssize_t
312bbc59 1254smb2_copychunk_range(const unsigned int xid,
41c1358e
SF		 1255 struct cifsFileInfo *srcfile,
1256 struct cifsFileInfo *trgtfile, u64 src_off,
1257 u64 len, u64 dest_off)
1258{
1259 int rc;
1260 unsigned int ret_data_len;
1261 struct copychunk_ioctl *pcchunk;
9bf0c9cd
SF		 1262 struct copychunk_ioctl_rsp *retbuf = NULL;
1263 struct cifs_tcon *tcon;
1264 int chunks_copied = 0;
1265 bool chunk_sizes_updated = false;
620d8745 1266 ssize_t bytes_written, total_bytes_written = 0;
41c1358e
SF		 1267
1268 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1269
1270 if (pcchunk == NULL)
1271 return -ENOMEM;
1272
312bbc59 1273 cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
41c1358e
SF		 1274 /* Request a key from the server to identify the source of the copy */
1275 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1276 srcfile->fid.persistent_fid,
1277 srcfile->fid.volatile_fid, pcchunk);
1278
1279 /* Note: request_res_key sets res_key null only if rc !=0 */
1280 if (rc)
9bf0c9cd 1281 goto cchunk_out;
41c1358e
SF		 1282
1283 /* For now array only one chunk long, will make more flexible later */
bc09d141 1284 pcchunk->ChunkCount = cpu_to_le32(1);
41c1358e 1285 pcchunk->Reserved = 0;
41c1358e
SF		 1286 pcchunk->Reserved2 = 0;
1287
9bf0c9cd 1288 tcon = tlink_tcon(trgtfile->tlink);
41c1358e 1289
9bf0c9cd
SF		 1290 while (len > 0) {
1291 pcchunk->SourceOffset = cpu_to_le64(src_off);
1292 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1293 pcchunk->Length =
1294 cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
41c1358e 1295
9bf0c9cd
SF		 1296 /* Request server copy to target from src identified by key */
1297 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1298 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
63a83b86 1299 true /* is_fsctl */, (char *)pcchunk,
9bf0c9cd
SF		 1300 sizeof(struct copychunk_ioctl), (char **)&retbuf,
1301 &ret_data_len);
1302 if (rc == 0) {
1303 if (ret_data_len !=
1304 sizeof(struct copychunk_ioctl_rsp)) {
1305 cifs_dbg(VFS, "invalid cchunk response size\n");
1306 rc = -EIO;
1307 goto cchunk_out;
1308 }
1309 if (retbuf->TotalBytesWritten == 0) {
1310 cifs_dbg(FYI, "no bytes copied\n");
1311 rc = -EIO;
1312 goto cchunk_out;
1313 }
1314 /*
1315 * Check if server claimed to write more than we asked
1316 */
1317 if (le32_to_cpu(retbuf->TotalBytesWritten) >
1318 le32_to_cpu(pcchunk->Length)) {
1319 cifs_dbg(VFS, "invalid copy chunk response\n");
1320 rc = -EIO;
1321 goto cchunk_out;
1322 }
1323 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1324 cifs_dbg(VFS, "invalid num chunks written\n");
1325 rc = -EIO;
1326 goto cchunk_out;
1327 }
1328 chunks_copied++;
1329
620d8745
SP		 1330 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1331 src_off += bytes_written;
1332 dest_off += bytes_written;
1333 len -= bytes_written;
1334 total_bytes_written += bytes_written;
9bf0c9cd 1335
620d8745 1336 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
9bf0c9cd
SF		 1337 le32_to_cpu(retbuf->ChunksWritten),
1338 le32_to_cpu(retbuf->ChunkBytesWritten),
620d8745 1339 bytes_written);
9bf0c9cd
SF		 1340 } else if (rc == -EINVAL) {
1341 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1342 goto cchunk_out;
1343
1344 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1345 le32_to_cpu(retbuf->ChunksWritten),
1346 le32_to_cpu(retbuf->ChunkBytesWritten),
1347 le32_to_cpu(retbuf->TotalBytesWritten));
1348
1349 /*
1350 * Check if this is the first request using these sizes,
1351 * (ie check if copy succeed once with original sizes
1352 * and check if the server gave us different sizes after
1353 * we already updated max sizes on previous request).
1354 * if not then why is the server returning an error now
1355 */
1356 if ((chunks_copied != 0) || chunk_sizes_updated)
1357 goto cchunk_out;
1358
1359 /* Check that server is not asking us to grow size */
1360 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1361 tcon->max_bytes_chunk)
1362 tcon->max_bytes_chunk =
1363 le32_to_cpu(retbuf->ChunkBytesWritten);
1364 else
1365 goto cchunk_out; /* server gave us bogus size */
1366
1367 /* No need to change MaxChunks since already set to 1 */
1368 chunk_sizes_updated = true;
2477bc58
SP		 1369 } else
1370 goto cchunk_out;
9bf0c9cd 1371 }
41c1358e 1372
9bf0c9cd 1373cchunk_out:
41c1358e 1374 kfree(pcchunk);
24df1483 1375 kfree(retbuf);
620d8745
SP		 1376 if (rc)
1377 return rc;
1378 else
1379 return total_bytes_written;
41c1358e
SF		 1380}
1381
7a5cfb19
PS		 1382static int
1383smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1384 struct cifs_fid *fid)
1385{
1386 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1387}
1388
09a4707e
PS		 1389static unsigned int
1390smb2_read_data_offset(char *buf)
1391{
1392 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1393 return rsp->DataOffset;
1394}
1395
1396static unsigned int
74dcf418 1397smb2_read_data_length(char *buf, bool in_remaining)
09a4707e
PS		 1398{
1399 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
74dcf418
LL		 1400
1401 if (in_remaining)
1402 return le32_to_cpu(rsp->DataRemaining);
1403
09a4707e
PS		 1404 return le32_to_cpu(rsp->DataLength);
1405}
1406
d8e05039
PS		 1407
1408static int
db8b631d 1409smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
d8e05039
PS		 1410 struct cifs_io_parms *parms, unsigned int *bytes_read,
1411 char **buf, int *buf_type)
1412{
db8b631d
SF		 1413 parms->persistent_fid = pfid->persistent_fid;
1414 parms->volatile_fid = pfid->volatile_fid;
d8e05039
PS		 1415 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1416}
1417
009d3443 1418static int
db8b631d 1419smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
009d3443
PS		 1420 struct cifs_io_parms *parms, unsigned int *written,
1421 struct kvec *iov, unsigned long nr_segs)
1422{
1423
db8b631d
SF		 1424 parms->persistent_fid = pfid->persistent_fid;
1425 parms->volatile_fid = pfid->volatile_fid;
009d3443
PS		 1426 return SMB2_write(xid, parms, written, iov, nr_segs);
1427}
1428
d43cc793
SF		 1429/* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1430static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1431 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1432{
1433 struct cifsInodeInfo *cifsi;
1434 int rc;
1435
1436 cifsi = CIFS_I(inode);
1437
1438 /* if file already sparse don't bother setting sparse again */
1439 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1440 return true; /* already sparse */
1441
1442 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1443 return true; /* already not sparse */
1444
1445 /*
1446 * Can't check for sparse support on share the usual way via the
1447 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1448 * since Samba server doesn't set the flag on the share, yet
1449 * supports the set sparse FSCTL and returns sparse correctly
1450 * in the file attributes. If we fail setting sparse though we
1451 * mark that server does not support sparse files for this share
1452 * to avoid repeatedly sending the unsupported fsctl to server
1453 * if the file is repeatedly extended.
1454 */
1455 if (tcon->broken_sparse_sup)
1456 return false;
1457
1458 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1459 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
63a83b86 1460 true /* is_fctl */,
51146625 1461 &setsparse, 1, NULL, NULL);
d43cc793
SF		 1462 if (rc) {
1463 tcon->broken_sparse_sup = true;
1464 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1465 return false;
1466 }
1467
1468 if (setsparse)
1469 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1470 else
1471 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1472
1473 return true;
1474}
1475
c839ff24
PS		 1476static int
1477smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1478 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1479{
1480 __le64 eof = cpu_to_le64(size);
3d1a3745
SF		 1481 struct inode *inode;
1482
1483 /*
1484 * If extending file more than one page make sparse. Many Linux fs
1485 * make files sparse by default when extending via ftruncate
1486 */
2b0143b5 1487 inode = d_inode(cfile->dentry);
3d1a3745
SF		 1488
1489 if (!set_alloc && (size > inode->i_size + 8192)) {
3d1a3745 1490 __u8 set_sparse = 1;
d43cc793
SF		 1491
1492 /* whether set sparse succeeds or not, extend the file */
1493 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
3d1a3745
SF		 1494 }
1495
c839ff24 1496 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3764cbd1 1497 cfile->fid.volatile_fid, cfile->pid, &eof);
c839ff24
PS		 1498}
1499
02b16665
SF		 1500static int
1501smb2_duplicate_extents(const unsigned int xid,
1502 struct cifsFileInfo *srcfile,
1503 struct cifsFileInfo *trgtfile, u64 src_off,
1504 u64 len, u64 dest_off)
1505{
1506 int rc;
1507 unsigned int ret_data_len;
02b16665
SF		 1508 struct duplicate_extents_to_file dup_ext_buf;
1509 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1510
1511 /* server fileays advertise duplicate extent support with this flag */
1512 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1513 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1514 return -EOPNOTSUPP;
1515
1516 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1517 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1518 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1519 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1520 dup_ext_buf.ByteCount = cpu_to_le64(len);
1521 cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
1522 src_off, dest_off, len);
1523
1524 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1525 if (rc)
1526 goto duplicate_extents_out;
1527
1528 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1529 trgtfile->fid.volatile_fid,
1530 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
63a83b86 1531 true /* is_fsctl */,
51146625 1532 (char *)&dup_ext_buf,
02b16665 1533 sizeof(struct duplicate_extents_to_file),
24df1483 1534 NULL,
02b16665
SF		 1535 &ret_data_len);
1536
1537 if (ret_data_len > 0)
1538 cifs_dbg(FYI, "non-zero response length in duplicate extents");
1539
1540duplicate_extents_out:
1541 return rc;
1542}
02b16665 1543
64a5cfa6
SF		 1544static int
1545smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1546 struct cifsFileInfo *cfile)
1547{
1548 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1549 cfile->fid.volatile_fid);
1550}
1551
b3152e2c
SF		 1552static int
1553smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1554 struct cifsFileInfo *cfile)
1555{
1556 struct fsctl_set_integrity_information_req integr_info;
b3152e2c
SF		 1557 unsigned int ret_data_len;
1558
1559 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1560 integr_info.Flags = 0;
1561 integr_info.Reserved = 0;
1562
1563 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1564 cfile->fid.volatile_fid,
1565 FSCTL_SET_INTEGRITY_INFORMATION,
63a83b86 1566 true /* is_fsctl */,
51146625 1567 (char *)&integr_info,
b3152e2c 1568 sizeof(struct fsctl_set_integrity_information_req),
24df1483 1569 NULL,
b3152e2c
SF		 1570 &ret_data_len);
1571
1572}
1573
e02789a5
SF		 1574/* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1575#define GMT_TOKEN_SIZE 50
1576
1577/*
1578 * Input buffer contains (empty) struct smb_snapshot array with size filled in
1579 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
1580 */
834170c8
SF		 1581static int
1582smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1583 struct cifsFileInfo *cfile, void __user *ioc_buf)
1584{
1585 char *retbuf = NULL;
1586 unsigned int ret_data_len = 0;
1587 int rc;
1588 struct smb_snapshot_array snapshot_in;
1589
1590 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1591 cfile->fid.volatile_fid,
1592 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
63a83b86 1593 true /* is_fsctl */,
51146625 1594 NULL, 0 /* no input data */,
834170c8
SF		 1595 (char **)&retbuf,
1596 &ret_data_len);
1597 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1598 rc, ret_data_len);
1599 if (rc)
1600 return rc;
1601
1602 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
1603 /* Fixup buffer */
1604 if (copy_from_user(&snapshot_in, ioc_buf,
1605 sizeof(struct smb_snapshot_array))) {
1606 rc = -EFAULT;
1607 kfree(retbuf);
1608 return rc;
1609 }
834170c8 1610
e02789a5
SF		 1611 /*
1612 * Check for min size, ie not large enough to fit even one GMT
1613 * token (snapshot). On the first ioctl some users may pass in
1614 * smaller size (or zero) to simply get the size of the array
1615 * so the user space caller can allocate sufficient memory
1616 * and retry the ioctl again with larger array size sufficient
1617 * to hold all of the snapshot GMT tokens on the second try.
1618 */
1619 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
1620 ret_data_len = sizeof(struct smb_snapshot_array);
1621
1622 /*
1623 * We return struct SRV_SNAPSHOT_ARRAY, followed by
1624 * the snapshot array (of 50 byte GMT tokens) each
1625 * representing an available previous version of the data
1626 */
1627 if (ret_data_len > (snapshot_in.snapshot_array_size +
1628 sizeof(struct smb_snapshot_array)))
1629 ret_data_len = snapshot_in.snapshot_array_size +
1630 sizeof(struct smb_snapshot_array);
834170c8
SF		 1631
1632 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
1633 rc = -EFAULT;
1634 }
1635
1636 kfree(retbuf);
1637 return rc;
1638}
1639
d324f08d
PS		 1640static int
1641smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
1642 const char *path, struct cifs_sb_info *cifs_sb,
1643 struct cifs_fid *fid, __u16 search_flags,
1644 struct cifs_search_info *srch_inf)
1645{
1646 __le16 *utf16_path;
1647 int rc;
2e44b288 1648 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
064f6047 1649 struct cifs_open_parms oparms;
d324f08d
PS		 1650
1651 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1652 if (!utf16_path)
1653 return -ENOMEM;
1654
064f6047
PS		 1655 oparms.tcon = tcon;
1656 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
1657 oparms.disposition = FILE_OPEN;
5e19697b
SF		 1658 if (backup_cred(cifs_sb))
1659 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1660 else
1661 oparms.create_options = 0;
064f6047 1662 oparms.fid = fid;
9cbc0b73 1663 oparms.reconnect = false;
064f6047 1664
9d874c36 1665 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
d324f08d
PS		 1666 kfree(utf16_path);
1667 if (rc) {
dcd87838 1668 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
d324f08d
PS		 1669 return rc;
1670 }
1671
1672 srch_inf->entries_in_buffer = 0;
0595751f 1673 srch_inf->index_of_last_entry = 2;
d324f08d 1674
064f6047
PS		 1675 rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
1676 fid->volatile_fid, 0, srch_inf);
d324f08d 1677 if (rc) {
dcd87838 1678 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
064f6047 1679 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
d324f08d
PS		 1680 }
1681 return rc;
1682}
1683
1684static int
1685smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1686 struct cifs_fid *fid, __u16 search_flags,
1687 struct cifs_search_info *srch_inf)
1688{
1689 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1690 fid->volatile_fid, 0, srch_inf);
1691}
1692
1693static int
1694smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1695 struct cifs_fid *fid)
1696{
1697 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1698}
1699
2e44b288
PS		 1700/*
1701* If we negotiate SMB2 protocol and get STATUS_PENDING - update
1702* the number of credits and return true. Otherwise - return false.
1703*/
1704static bool
1705smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1706{
49f466bd 1707 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2e44b288 1708
31473fc4 1709 if (shdr->Status != STATUS_PENDING)
2e44b288
PS		 1710 return false;
1711
1712 if (!length) {
1713 spin_lock(&server->req_lock);
31473fc4 1714 server->credits += le16_to_cpu(shdr->CreditRequest);
2e44b288
PS		 1715 spin_unlock(&server->req_lock);
1716 wake_up(&server->request_q);
1717 }
1718
1719 return true;
1720}
1721
511c54a2
PS		 1722static bool
1723smb2_is_session_expired(char *buf)
1724{
49f466bd 1725 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
511c54a2 1726
d81243c6
MS		 1727 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
1728 shdr->Status != STATUS_USER_SESSION_DELETED)
511c54a2
PS		 1729 return false;
1730
e68a932b
SF		 1731 trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
1732 le16_to_cpu(shdr->Command),
1733 le64_to_cpu(shdr->MessageId));
d81243c6 1734 cifs_dbg(FYI, "Session expired or deleted\n");
e68a932b 1735
511c54a2
PS		 1736 return true;
1737}
1738
983c88a4
PS		 1739static int
1740smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1741 struct cifsInodeInfo *cinode)
1742{
0822f514
PS		 1743 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1744 return SMB2_lease_break(0, tcon, cinode->lease_key,
1745 smb2_get_lease_state(cinode));
1746
983c88a4
PS		 1747 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1748 fid->volatile_fid,
18cceb6a 1749 CIFS_CACHE_READ(cinode) ? 1 : 0);
983c88a4
PS		 1750}
1751
c5a5f38f 1752void
730928c8
RS		 1753smb2_set_related(struct smb_rqst *rqst)
1754{
1755 struct smb2_sync_hdr *shdr;
1756
1757 shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
1758 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
1759}
1760
1761char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
1762
c5a5f38f 1763void
271b9c0c
RS		 1764smb2_set_next_command(struct TCP_Server_Info *server, struct smb_rqst *rqst,
1765 bool has_space_for_padding)
730928c8
RS		 1766{
1767 struct smb2_sync_hdr *shdr;
1768 unsigned long len = smb_rqst_len(server, rqst);
1769
1770 /* SMB headers in a compound are 8 byte aligned. */
1771 if (len & 7) {
271b9c0c
RS		 1772 if (has_space_for_padding) {
1773 len = rqst->rq_iov[rqst->rq_nvec - 1].iov_len;
1774 rqst->rq_iov[rqst->rq_nvec - 1].iov_len =
1775 (len + 7) & ~7;
1776 } else {
1777 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
1778 rqst->rq_iov[rqst->rq_nvec].iov_len = 8 - (len & 7);
1779 rqst->rq_nvec++;
1780 }
730928c8
RS		 1781 len = smb_rqst_len(server, rqst);
1782 }
1783
1784 shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
1785 shdr->NextCommand = cpu_to_le32(len);
1786}
1787
6fc05c25
PS		 1788static int
1789smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1790 struct kstatfs *buf)
1791{
730928c8
RS		 1792 struct smb2_query_info_rsp *rsp;
1793 struct smb2_fs_full_size_info *info = NULL;
1794 struct smb_rqst rqst[3];
1795 int resp_buftype[3];
1796 struct kvec rsp_iov[3];
4d8dfafc 1797 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
730928c8
RS		 1798 struct kvec qi_iov[1];
1799 struct kvec close_iov[1];
1800 struct cifs_ses *ses = tcon->ses;
1801 struct TCP_Server_Info *server = ses->server;
6fc05c25
PS		 1802 __le16 srch_path = 0; /* Null - open root of share */
1803 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
064f6047
PS		 1804 struct cifs_open_parms oparms;
1805 struct cifs_fid fid;
730928c8
RS		 1806 int flags = 0;
1807 int rc;
1808
1809 if (smb3_encryption_required(tcon))
1810 flags |= CIFS_TRANSFORM_REQ;
1811
1812 memset(rqst, 0, sizeof(rqst));
c5a5f38f 1813 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
730928c8
RS		 1814 memset(rsp_iov, 0, sizeof(rsp_iov));
1815
1816 memset(&open_iov, 0, sizeof(open_iov));
1817 rqst[0].rq_iov = open_iov;
4d8dfafc 1818 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
064f6047
PS		 1819
1820 oparms.tcon = tcon;
1821 oparms.desired_access = FILE_READ_ATTRIBUTES;
1822 oparms.disposition = FILE_OPEN;
1823 oparms.create_options = 0;
1824 oparms.fid = &fid;
9cbc0b73 1825 oparms.reconnect = false;
6fc05c25 1826
730928c8 1827 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, &srch_path);
6fc05c25 1828 if (rc)
730928c8 1829 goto qfs_exit;
271b9c0c 1830 smb2_set_next_command(server, &rqst[0], 0);
730928c8
RS		 1831
1832 memset(&qi_iov, 0, sizeof(qi_iov));
1833 rqst[1].rq_iov = qi_iov;
1834 rqst[1].rq_nvec = 1;
1835
1836 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1837 FS_FULL_SIZE_INFORMATION,
1838 SMB2_O_INFO_FILESYSTEM, 0,
f5b05d62
RS		 1839 sizeof(struct smb2_fs_full_size_info), 0,
1840 NULL);
730928c8
RS		 1841 if (rc)
1842 goto qfs_exit;
271b9c0c 1843 smb2_set_next_command(server, &rqst[1], 0);
730928c8
RS		 1844 smb2_set_related(&rqst[1]);
1845
1846 memset(&close_iov, 0, sizeof(close_iov));
1847 rqst[2].rq_iov = close_iov;
1848 rqst[2].rq_nvec = 1;
1849
1850 rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
1851 if (rc)
1852 goto qfs_exit;
1853 smb2_set_related(&rqst[2]);
1854
1855 rc = compound_send_recv(xid, ses, flags, 3, rqst,
1856 resp_buftype, rsp_iov);
1857 if (rc)
1858 goto qfs_exit;
1859
1860 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
6fc05c25 1861 buf->f_type = SMB2_MAGIC_NUMBER;
730928c8
RS		 1862 info = (struct smb2_fs_full_size_info *)(
1863 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1864 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1865 le32_to_cpu(rsp->OutputBufferLength),
1866 &rsp_iov[1],
1867 sizeof(struct smb2_fs_full_size_info));
1868 if (!rc)
1869 smb2_copy_fs_info_to_kstatfs(info, buf);
1870
1871qfs_exit:
1872 SMB2_open_free(&rqst[0]);
1873 SMB2_query_info_free(&rqst[1]);
1874 SMB2_close_free(&rqst[2]);
1875 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1876 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1877 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
6fc05c25
PS		 1878 return rc;
1879}
1880
2d304217
SF		 1881static int
1882smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1883 struct kstatfs *buf)
1884{
1885 int rc;
1886 __le16 srch_path = 0; /* Null - open root of share */
1887 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1888 struct cifs_open_parms oparms;
1889 struct cifs_fid fid;
1890
1891 if (!tcon->posix_extensions)
1892 return smb2_queryfs(xid, tcon, buf);
1893
1894 oparms.tcon = tcon;
1895 oparms.desired_access = FILE_READ_ATTRIBUTES;
1896 oparms.disposition = FILE_OPEN;
1897 oparms.create_options = 0;
1898 oparms.fid = &fid;
1899 oparms.reconnect = false;
1900
1901 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
1902 if (rc)
1903 return rc;
1904
1905 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
1906 fid.volatile_fid, buf);
1907 buf->f_type = SMB2_MAGIC_NUMBER;
1908 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1909 return rc;
1910}
2d304217 1911
027e8eec
PS		 1912static bool
1913smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1914{
1915 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1916 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1917}
1918
f7ba7fe6
PS		 1919static int
1920smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1921 __u64 length, __u32 type, int lock, int unlock, bool wait)
1922{
1923 if (unlock && !lock)
1924 type = SMB2_LOCKFLAG_UNLOCK;
1925 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1926 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1927 current->tgid, length, offset, type, wait);
1928}
1929
b8c32dbb
PS		 1930static void
1931smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1932{
1933 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1934}
1935
1936static void
1937smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1938{
1939 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1940}
1941
1942static void
1943smb2_new_lease_key(struct cifs_fid *fid)
1944{
fa70b87c 1945 generate_random_uuid(fid->lease_key);
b8c32dbb
PS		 1946}
1947
9d49640a
AA		 1948static int
1949smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
1950 const char *search_name,
1951 struct dfs_info3_param **target_nodes,
1952 unsigned int *num_of_nodes,
1953 const struct nls_table *nls_codepage, int remap)
1954{
1955 int rc;
1956 __le16 *utf16_path = NULL;
1957 int utf16_path_len = 0;
1958 struct cifs_tcon *tcon;
1959 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
1960 struct get_dfs_referral_rsp *dfs_rsp = NULL;
1961 u32 dfs_req_size = 0, dfs_rsp_size = 0;
1962
1963 cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
1964
1965 /*
63a83b86 1966 * Try to use the IPC tcon, otherwise just use any
9d49640a 1967 */
63a83b86
AA		 1968 tcon = ses->tcon_ipc;
1969 if (tcon == NULL) {
1970 spin_lock(&cifs_tcp_ses_lock);
1971 tcon = list_first_entry_or_null(&ses->tcon_list,
1972 struct cifs_tcon,
1973 tcon_list);
1974 if (tcon)
1975 tcon->tc_count++;
1976 spin_unlock(&cifs_tcp_ses_lock);
1977 }
1978
1979 if (tcon == NULL) {
9d49640a
AA		 1980 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
1981 ses);
1982 rc = -ENOTCONN;
1983 goto out;
1984 }
1985
1986 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
1987 &utf16_path_len,
1988 nls_codepage, remap);
1989 if (!utf16_path) {
1990 rc = -ENOMEM;
1991 goto out;
1992 }
1993
1994 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
1995 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
1996 if (!dfs_req) {
1997 rc = -ENOMEM;
1998 goto out;
1999 }
2000
2001 /* Highest DFS referral version understood */
2002 dfs_req->MaxReferralLevel = DFS_VERSION;
2003
2004 /* Path to resolve in an UTF-16 null-terminated string */
2005 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2006
2007 do {
9d49640a
AA		 2008 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2009 FSCTL_DFS_GET_REFERRALS,
63a83b86 2010 true /* is_fsctl */,
9d49640a
AA		 2011 (char *)dfs_req, dfs_req_size,
2012 (char **)&dfs_rsp, &dfs_rsp_size);
9d49640a
AA		 2013 } while (rc == -EAGAIN);
2014
2015 if (rc) {
2564f2ff 2016 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
5702591f 2017 cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
9d49640a
AA		 2018 goto out;
2019 }
2020
2021 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2022 num_of_nodes, target_nodes,
2023 nls_codepage, remap, search_name,
2024 true /* is_unicode */);
2025 if (rc) {
2026 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
2027 goto out;
2028 }
2029
2030 out:
63a83b86
AA		 2031 if (tcon && !tcon->ipc) {
2032 /* ipc tcons are not refcounted */
9d49640a
AA		 2033 spin_lock(&cifs_tcp_ses_lock);
2034 tcon->tc_count--;
2035 spin_unlock(&cifs_tcp_ses_lock);
2036 }
2037 kfree(utf16_path);
2038 kfree(dfs_req);
2039 kfree(dfs_rsp);
2040 return rc;
2041}
7893242e
PS		 2042#define SMB2_SYMLINK_STRUCT_SIZE \
2043 (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
2044
b42bf888
PS		 2045static int
2046smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2047 const char *full_path, char **target_path,
2048 struct cifs_sb_info *cifs_sb)
2049{
2050 int rc;
2051 __le16 *utf16_path;
2052 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2053 struct cifs_open_parms oparms;
2054 struct cifs_fid fid;
91cb74f5 2055 struct kvec err_iov = {NULL, 0};
9d874c36
RS		 2056 struct smb2_err_rsp *err_buf = NULL;
2057 int resp_buftype;
b42bf888 2058 struct smb2_symlink_err_rsp *symlink;
7893242e
PS		 2059 unsigned int sub_len;
2060 unsigned int sub_offset;
2061 unsigned int print_len;
2062 unsigned int print_offset;
b42bf888
PS		 2063
2064 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2065
2066 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2067 if (!utf16_path)
2068 return -ENOMEM;
2069
2070 oparms.tcon = tcon;
2071 oparms.desired_access = FILE_READ_ATTRIBUTES;
2072 oparms.disposition = FILE_OPEN;
5e19697b
SF		 2073 if (backup_cred(cifs_sb))
2074 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2075 else
2076 oparms.create_options = 0;
b42bf888
PS		 2077 oparms.fid = &fid;
2078 oparms.reconnect = false;
2079
9d874c36
RS		 2080 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_iov,
2081 &resp_buftype);
0d568cd3 2082 if (!rc || !err_iov.iov_base) {
9d874c36 2083 rc = -ENOENT;
ff361fda 2084 goto free_path;
b42bf888 2085 }
7893242e 2086
91cb74f5 2087 err_buf = err_iov.iov_base;
7893242e 2088 if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1fc6ad2f 2089 err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
9d874c36
RS		 2090 rc = -ENOENT;
2091 goto querty_exit;
7893242e
PS		 2092 }
2093
b42bf888
PS		 2094 /* open must fail on symlink - reset rc */
2095 rc = 0;
2096 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
2097 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
2098 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
7893242e
PS		 2099 print_len = le16_to_cpu(symlink->PrintNameLength);
2100 print_offset = le16_to_cpu(symlink->PrintNameOffset);
2101
1fc6ad2f 2102 if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
9d874c36
RS		 2103 rc = -ENOENT;
2104 goto querty_exit;
7893242e
PS		 2105 }
2106
1fc6ad2f
RS		 2107 if (err_iov.iov_len <
2108 SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
9d874c36
RS		 2109 rc = -ENOENT;
2110 goto querty_exit;
7893242e
PS		 2111 }
2112
b42bf888
PS		 2113 *target_path = cifs_strndup_from_utf16(
2114 (char *)symlink->PathBuffer + sub_offset,
2115 sub_len, true, cifs_sb->local_nls);
2116 if (!(*target_path)) {
9d874c36
RS		 2117 rc = -ENOMEM;
2118 goto querty_exit;
b42bf888
PS		 2119 }
2120 convert_delimiter(*target_path, '/');
2121 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
9d874c36
RS		 2122
2123 querty_exit:
2124 free_rsp_buf(resp_buftype, err_buf);
ff361fda 2125 free_path:
b42bf888
PS		 2126 kfree(utf16_path);
2127 return rc;
2128}
2129
84908426 2130#ifdef CONFIG_CIFS_ACL
2f1afe25
SP		 2131static struct cifs_ntsd *
2132get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
2133 const struct cifs_fid *cifsfid, u32 *pacllen)
2134{
2135 struct cifs_ntsd *pntsd = NULL;
2136 unsigned int xid;
2137 int rc = -EOPNOTSUPP;
2138 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2139
2140 if (IS_ERR(tlink))
2141 return ERR_CAST(tlink);
2142
2143 xid = get_xid();
2144 cifs_dbg(FYI, "trying to get acl\n");
2145
2146 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
2147 cifsfid->volatile_fid, (void **)&pntsd, pacllen);
2148 free_xid(xid);
2149
2150 cifs_put_tlink(tlink);
2151
2152 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2153 if (rc)
2154 return ERR_PTR(rc);
2155 return pntsd;
2156
2157}
2158
2159static struct cifs_ntsd *
2160get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
2161 const char *path, u32 *pacllen)
2162{
2163 struct cifs_ntsd *pntsd = NULL;
2164 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2165 unsigned int xid;
2166 int rc;
2167 struct cifs_tcon *tcon;
2168 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2169 struct cifs_fid fid;
2170 struct cifs_open_parms oparms;
2171 __le16 *utf16_path;
2172
2173 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
2174 if (IS_ERR(tlink))
2175 return ERR_CAST(tlink);
2176
2177 tcon = tlink_tcon(tlink);
2178 xid = get_xid();
2179
2180 if (backup_cred(cifs_sb))
709340a0 2181 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2f1afe25
SP		 2182 else
2183 oparms.create_options = 0;
2184
2185 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
cfe89091
SF		 2186 if (!utf16_path) {
2187 rc = -ENOMEM;
2188 free_xid(xid);
2189 return ERR_PTR(rc);
2190 }
2f1afe25
SP		 2191
2192 oparms.tcon = tcon;
2193 oparms.desired_access = READ_CONTROL;
2194 oparms.disposition = FILE_OPEN;
2195 oparms.fid = &fid;
2196 oparms.reconnect = false;
2197
9d874c36 2198 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2f1afe25
SP		 2199 kfree(utf16_path);
2200 if (!rc) {
2201 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
2202 fid.volatile_fid, (void **)&pntsd, pacllen);
2203 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2204 }
2205
2206 cifs_put_tlink(tlink);
2207 free_xid(xid);
2208
2209 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2210 if (rc)
2211 return ERR_PTR(rc);
2212 return pntsd;
2213}
2214
366ed846
SP		 2215#ifdef CONFIG_CIFS_ACL
2216static int
2217set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
2218 struct inode *inode, const char *path, int aclflag)
2219{
2220 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2221 unsigned int xid;
2222 int rc, access_flags = 0;
2223 struct cifs_tcon *tcon;
2224 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2225 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2226 struct cifs_fid fid;
2227 struct cifs_open_parms oparms;
2228 __le16 *utf16_path;
2229
2230 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
2231 if (IS_ERR(tlink))
2232 return PTR_ERR(tlink);
2233
2234 tcon = tlink_tcon(tlink);
2235 xid = get_xid();
2236
2237 if (backup_cred(cifs_sb))
2238 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2239 else
2240 oparms.create_options = 0;
2241
2242 if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
2243 access_flags = WRITE_OWNER;
2244 else
2245 access_flags = WRITE_DAC;
2246
2247 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
cfe89091
SF		 2248 if (!utf16_path) {
2249 rc = -ENOMEM;
2250 free_xid(xid);
2251 return rc;
2252 }
366ed846
SP		 2253
2254 oparms.tcon = tcon;
2255 oparms.desired_access = access_flags;
2256 oparms.disposition = FILE_OPEN;
2257 oparms.path = path;
2258 oparms.fid = &fid;
2259 oparms.reconnect = false;
2260
9d874c36 2261 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
366ed846
SP		 2262 kfree(utf16_path);
2263 if (!rc) {
2264 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
2265 fid.volatile_fid, pnntsd, acllen, aclflag);
2266 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2267 }
2268
2269 cifs_put_tlink(tlink);
2270 free_xid(xid);
2271 return rc;
2272}
2273#endif /* CIFS_ACL */
2274
2f1afe25
SP		 2275/* Retrieve an ACL from the server */
2276static struct cifs_ntsd *
2277get_smb2_acl(struct cifs_sb_info *cifs_sb,
2278 struct inode *inode, const char *path,
2279 u32 *pacllen)
2280{
2281 struct cifs_ntsd *pntsd = NULL;
2282 struct cifsFileInfo *open_file = NULL;
2283
2284 if (inode)
2285 open_file = find_readable_file(CIFS_I(inode), true);
2286 if (!open_file)
2287 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
2288
2289 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
2290 cifsFileInfo_put(open_file);
2291 return pntsd;
2292}
84908426 2293#endif
2f1afe25 2294
30175628
SF		 2295static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
2296 loff_t offset, loff_t len, bool keep_size)
2297{
2298 struct inode *inode;
2299 struct cifsInodeInfo *cifsi;
2300 struct cifsFileInfo *cfile = file->private_data;
2301 struct file_zero_data_information fsctl_buf;
2302 long rc;
2303 unsigned int xid;
2304
2305 xid = get_xid();
2306
2b0143b5 2307 inode = d_inode(cfile->dentry);
30175628
SF		 2308 cifsi = CIFS_I(inode);
2309
2310 /* if file not oplocked can't be sure whether asking to extend size */
2311 if (!CIFS_CACHE_READ(cifsi))
cfe89091
SF		 2312 if (keep_size == false) {
2313 rc = -EOPNOTSUPP;
2314 free_xid(xid);
2315 return rc;
2316 }
30175628 2317
2bb93d24 2318 /*
30175628
SF		 2319 * Must check if file sparse since fallocate -z (zero range) assumes
2320 * non-sparse allocation
2321 */
cfe89091
SF		 2322 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
2323 rc = -EOPNOTSUPP;
2324 free_xid(xid);
2325 return rc;
2326 }
30175628
SF		 2327
2328 /*
2329 * need to make sure we are not asked to extend the file since the SMB3
2330 * fsctl does not change the file size. In the future we could change
2331 * this to zero the first part of the range then set the file size
2332 * which for a non sparse file would zero the newly extended range
2333 */
2334 if (keep_size == false)
cfe89091
SF		 2335 if (i_size_read(inode) < offset + len) {
2336 rc = -EOPNOTSUPP;
2337 free_xid(xid);
2338 return rc;
2339 }
30175628
SF		 2340
2341 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
2342
2343 fsctl_buf.FileOffset = cpu_to_le64(offset);
2344 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
2345
2346 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2347 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
63a83b86 2348 true /* is_fctl */, (char *)&fsctl_buf,
30175628
SF		 2349 sizeof(struct file_zero_data_information), NULL, NULL);
2350 free_xid(xid);
2351 return rc;
2352}
2353
31742c5a
SF		 2354static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
2355 loff_t offset, loff_t len)
2356{
2357 struct inode *inode;
2358 struct cifsInodeInfo *cifsi;
2359 struct cifsFileInfo *cfile = file->private_data;
2360 struct file_zero_data_information fsctl_buf;
2361 long rc;
2362 unsigned int xid;
2363 __u8 set_sparse = 1;
2364
2365 xid = get_xid();
2366
2b0143b5 2367 inode = d_inode(cfile->dentry);
31742c5a
SF		 2368 cifsi = CIFS_I(inode);
2369
2370 /* Need to make file sparse, if not already, before freeing range. */
2371 /* Consider adding equivalent for compressed since it could also work */
cfe89091
SF		 2372 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
2373 rc = -EOPNOTSUPP;
2374 free_xid(xid);
2375 return rc;
2376 }
31742c5a
SF		 2377
2378 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
2379
2380 fsctl_buf.FileOffset = cpu_to_le64(offset);
2381 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
2382
2383 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2384 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
63a83b86 2385 true /* is_fctl */, (char *)&fsctl_buf,
31742c5a
SF		 2386 sizeof(struct file_zero_data_information), NULL, NULL);
2387 free_xid(xid);
2388 return rc;
2389}
2390
9ccf3216
SF		 2391static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
2392 loff_t off, loff_t len, bool keep_size)
2393{
2394 struct inode *inode;
2395 struct cifsInodeInfo *cifsi;
2396 struct cifsFileInfo *cfile = file->private_data;
2397 long rc = -EOPNOTSUPP;
2398 unsigned int xid;
2399
2400 xid = get_xid();
2401
2b0143b5 2402 inode = d_inode(cfile->dentry);
9ccf3216
SF		 2403 cifsi = CIFS_I(inode);
2404
2405 /* if file not oplocked can't be sure whether asking to extend size */
2406 if (!CIFS_CACHE_READ(cifsi))
cfe89091
SF		 2407 if (keep_size == false) {
2408 free_xid(xid);
2409 return rc;
2410 }
9ccf3216
SF		 2411
2412 /*
2413 * Files are non-sparse by default so falloc may be a no-op
2414 * Must check if file sparse. If not sparse, and not extending
2415 * then no need to do anything since file already allocated
2416 */
2417 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
2418 if (keep_size == true)
cfe89091 2419 rc = 0;
9ccf3216
SF		 2420 /* check if extending file */
2421 else if (i_size_read(inode) >= off + len)
2422 /* not extending file and already not sparse */
cfe89091 2423 rc = 0;
9ccf3216
SF		 2424 /* BB: in future add else clause to extend file */
2425 else
cfe89091
SF		 2426 rc = -EOPNOTSUPP;
2427 free_xid(xid);
2428 return rc;
9ccf3216
SF		 2429 }
2430
2431 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
2432 /*
2433 * Check if falloc starts within first few pages of file
2434 * and ends within a few pages of the end of file to
2435 * ensure that most of file is being forced to be
2436 * fallocated now. If so then setting whole file sparse
2437 * ie potentially making a few extra pages at the beginning
2438 * or end of the file non-sparse via set_sparse is harmless.
2439 */
cfe89091
SF		 2440 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
2441 rc = -EOPNOTSUPP;
2442 free_xid(xid);
2443 return rc;
2444 }
9ccf3216
SF		 2445
2446 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
2447 }
2448 /* BB: else ... in future add code to extend file and set sparse */
2449
2450
2451 free_xid(xid);
2452 return rc;
2453}
2454
2455
31742c5a
SF		 2456static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
2457 loff_t off, loff_t len)
2458{
2459 /* KEEP_SIZE already checked for by do_fallocate */
2460 if (mode & FALLOC_FL_PUNCH_HOLE)
2461 return smb3_punch_hole(file, tcon, off, len);
30175628
SF		 2462 else if (mode & FALLOC_FL_ZERO_RANGE) {
2463 if (mode & FALLOC_FL_KEEP_SIZE)
2464 return smb3_zero_range(file, tcon, off, len, true);
2465 return smb3_zero_range(file, tcon, off, len, false);
9ccf3216
SF		 2466 } else if (mode == FALLOC_FL_KEEP_SIZE)
2467 return smb3_simple_falloc(file, tcon, off, len, true);
2468 else if (mode == 0)
2469 return smb3_simple_falloc(file, tcon, off, len, false);
31742c5a
SF		 2470
2471 return -EOPNOTSUPP;
2472}
2473
c11f1df5
SP		 2474static void
2475smb2_downgrade_oplock(struct TCP_Server_Info *server,
2476 struct cifsInodeInfo *cinode, bool set_level2)
2477{
2478 if (set_level2)
2479 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
2480 0, NULL);
2481 else
2482 server->ops->set_oplock_level(cinode, 0, 0, NULL);
2483}
2484
53ef1016 2485static void
42873b0a
PS		 2486smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2487 unsigned int epoch, bool *purge_cache)
53ef1016
PS		 2488{
2489 oplock &= 0xFF;
2490 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2491 return;
2492 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
42873b0a 2493 cinode->oplock = CIFS_CACHE_RHW_FLG;
53ef1016
PS		 2494 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
2495 &cinode->vfs_inode);
2496 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
42873b0a 2497 cinode->oplock = CIFS_CACHE_RW_FLG;
53ef1016
PS		 2498 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
2499 &cinode->vfs_inode);
2500 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
2501 cinode->oplock = CIFS_CACHE_READ_FLG;
2502 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
2503 &cinode->vfs_inode);
2504 } else
2505 cinode->oplock = 0;
2506}
2507
2508static void
42873b0a
PS		 2509smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2510 unsigned int epoch, bool *purge_cache)
53ef1016
PS		 2511{
2512 char message[5] = {0};
2513
2514 oplock &= 0xFF;
2515 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2516 return;
2517
2518 cinode->oplock = 0;
2519 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
2520 cinode->oplock |= CIFS_CACHE_READ_FLG;
2521 strcat(message, "R");
2522 }
2523 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
2524 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
2525 strcat(message, "H");
2526 }
2527 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
2528 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
2529 strcat(message, "W");
2530 }
2531 if (!cinode->oplock)
2532 strcat(message, "None");
2533 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
2534 &cinode->vfs_inode);
2535}
2536
42873b0a
PS		 2537static void
2538smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2539 unsigned int epoch, bool *purge_cache)
2540{
2541 unsigned int old_oplock = cinode->oplock;
2542
2543 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
2544
2545 if (purge_cache) {
2546 *purge_cache = false;
2547 if (old_oplock == CIFS_CACHE_READ_FLG) {
2548 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
2549 (epoch - cinode->epoch > 0))
2550 *purge_cache = true;
2551 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2552 (epoch - cinode->epoch > 1))
2553 *purge_cache = true;
2554 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2555 (epoch - cinode->epoch > 1))
2556 *purge_cache = true;
2557 else if (cinode->oplock == 0 &&
2558 (epoch - cinode->epoch > 0))
2559 *purge_cache = true;
2560 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
2561 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2562 (epoch - cinode->epoch > 0))
2563 *purge_cache = true;
2564 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2565 (epoch - cinode->epoch > 1))
2566 *purge_cache = true;
2567 }
2568 cinode->epoch = epoch;
2569 }
2570}
2571
53ef1016
PS		 2572static bool
2573smb2_is_read_op(__u32 oplock)
2574{
2575 return oplock == SMB2_OPLOCK_LEVEL_II;
2576}
2577
2578static bool
2579smb21_is_read_op(__u32 oplock)
2580{
2581 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
2582 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
2583}
2584
f047390a
PS		 2585static __le32
2586map_oplock_to_lease(u8 oplock)
2587{
2588 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
2589 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
2590 else if (oplock == SMB2_OPLOCK_LEVEL_II)
2591 return SMB2_LEASE_READ_CACHING;
2592 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
2593 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
2594 SMB2_LEASE_WRITE_CACHING;
2595 return 0;
2596}
2597
a41a28bd
PS		 2598static char *
2599smb2_create_lease_buf(u8 *lease_key, u8 oplock)
2600{
2601 struct create_lease *buf;
2602
2603 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
2604 if (!buf)
2605 return NULL;
2606
729c0c9d 2607 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
f047390a 2608 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
a41a28bd
PS		 2609
2610 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2611 (struct create_lease, lcontext));
2612 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
2613 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2614 (struct create_lease, Name));
2615 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 2616 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
a41a28bd
PS		 2617 buf->Name[0] = 'R';
2618 buf->Name[1] = 'q';
2619 buf->Name[2] = 'L';
2620 buf->Name[3] = 's';
2621 return (char *)buf;
2622}
2623
f047390a
PS		 2624static char *
2625smb3_create_lease_buf(u8 *lease_key, u8 oplock)
2626{
2627 struct create_lease_v2 *buf;
2628
2629 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
2630 if (!buf)
2631 return NULL;
2632
729c0c9d 2633 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
f047390a
PS		 2634 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2635
2636 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2637 (struct create_lease_v2, lcontext));
2638 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
2639 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2640 (struct create_lease_v2, Name));
2641 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 2642 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
f047390a
PS		 2643 buf->Name[0] = 'R';
2644 buf->Name[1] = 'q';
2645 buf->Name[2] = 'L';
2646 buf->Name[3] = 's';
2647 return (char *)buf;
2648}
2649
b5c7cde3 2650static __u8
96164ab2 2651smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
b5c7cde3
PS		 2652{
2653 struct create_lease *lc = (struct create_lease *)buf;
2654
42873b0a 2655 *epoch = 0; /* not used */
b5c7cde3
PS		 2656 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2657 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2658 return le32_to_cpu(lc->lcontext.LeaseState);
2659}
2660
f047390a 2661static __u8
96164ab2 2662smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
f047390a
PS		 2663{
2664 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
2665
42873b0a 2666 *epoch = le16_to_cpu(lc->lcontext.Epoch);
f047390a
PS		 2667 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2668 return SMB2_OPLOCK_LEVEL_NOCHANGE;
96164ab2 2669 if (lease_key)
729c0c9d 2670 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
f047390a
PS		 2671 return le32_to_cpu(lc->lcontext.LeaseState);
2672}
2673
7f6c5008
PS		 2674static unsigned int
2675smb2_wp_retry_size(struct inode *inode)
2676{
2677 return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
2678 SMB2_MAX_BUFFER_SIZE);
2679}
2680
52755808
PS		 2681static bool
2682smb2_dir_needs_close(struct cifsFileInfo *cfile)
2683{
2684 return !cfile->invalidHandle;
2685}
2686
026e93dc 2687static void
977b6170
RS		 2688fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
2689 struct smb_rqst *old_rq)
026e93dc
PS		 2690{
2691 struct smb2_sync_hdr *shdr =
c713c877 2692 (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
026e93dc
PS		 2693
2694 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
2695 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
2696 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
2697 tr_hdr->Flags = cpu_to_le16(0x01);
2698 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2699 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
026e93dc
PS		 2700}
2701
262916bc
RS		 2702/* We can not use the normal sg_set_buf() as we will sometimes pass a
2703 * stack object as buf.
2704 */
2705static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
2706 unsigned int buflen)
2707{
2708 sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
2709}
2710
b2c96de7
RS		 2711/* Assumes the first rqst has a transform header as the first iov.
2712 * I.e.
2713 * rqst[0].rq_iov[0] is transform header
2714 * rqst[0].rq_iov[1+] data to be encrypted/decrypted
2715 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
977b6170 2716 */
026e93dc 2717static struct scatterlist *
b2c96de7 2718init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
026e93dc 2719{
b2c96de7 2720 unsigned int sg_len;
026e93dc
PS		 2721 struct scatterlist *sg;
2722 unsigned int i;
2723 unsigned int j;
b2c96de7
RS		 2724 unsigned int idx = 0;
2725 int skip;
2726
2727 sg_len = 1;
2728 for (i = 0; i < num_rqst; i++)
2729 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
026e93dc
PS		 2730
2731 sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
2732 if (!sg)
2733 return NULL;
2734
2735 sg_init_table(sg, sg_len);
b2c96de7
RS		 2736 for (i = 0; i < num_rqst; i++) {
2737 for (j = 0; j < rqst[i].rq_nvec; j++) {
2738 /*
2739 * The first rqst has a transform header where the
2740 * first 20 bytes are not part of the encrypted blob
2741 */
2742 skip = (i == 0) && (j == 0) ? 20 : 0;
2743 smb2_sg_set_buf(&sg[idx++],
2744 rqst[i].rq_iov[j].iov_base + skip,
2745 rqst[i].rq_iov[j].iov_len - skip);
2746 }
2747
2748 for (j = 0; j < rqst[i].rq_npages; j++) {
2749 unsigned int len, offset;
d5f07fb3 2750
b2c96de7
RS		 2751 rqst_page_get_length(&rqst[i], j, &len, &offset);
2752 sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
2753 }
026e93dc 2754 }
b2c96de7 2755 smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
026e93dc
PS		 2756 return sg;
2757}
2758
61cfac6f
PS		 2759static int
2760smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
2761{
2762 struct cifs_ses *ses;
2763 u8 *ses_enc_key;
2764
2765 spin_lock(&cifs_tcp_ses_lock);
2766 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2767 if (ses->Suid != ses_id)
2768 continue;
2769 ses_enc_key = enc ? ses->smb3encryptionkey :
2770 ses->smb3decryptionkey;
2771 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
2772 spin_unlock(&cifs_tcp_ses_lock);
2773 return 0;
2774 }
2775 spin_unlock(&cifs_tcp_ses_lock);
2776
2777 return 1;
2778}
026e93dc 2779/*
c713c877
RS		 2780 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
2781 * iov[0] - transform header (associate data),
2782 * iov[1-N] - SMB2 header and pages - data to encrypt.
2783 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
026e93dc
PS		 2784 * untouched.
2785 */
2786static int
b2c96de7
RS		 2787crypt_message(struct TCP_Server_Info *server, int num_rqst,
2788 struct smb_rqst *rqst, int enc)
026e93dc
PS		 2789{
2790 struct smb2_transform_hdr *tr_hdr =
b2c96de7 2791 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
1fc6ad2f 2792 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
026e93dc
PS		 2793 int rc = 0;
2794 struct scatterlist *sg;
2795 u8 sign[SMB2_SIGNATURE_SIZE] = {};
61cfac6f 2796 u8 key[SMB3_SIGN_KEY_SIZE];
026e93dc
PS		 2797 struct aead_request *req;
2798 char *iv;
2799 unsigned int iv_len;
a5186b85 2800 DECLARE_CRYPTO_WAIT(wait);
026e93dc
PS		 2801 struct crypto_aead *tfm;
2802 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2803
61cfac6f
PS		 2804 rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
2805 if (rc) {
2806 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
2807 enc ? "en" : "de");
026e93dc
PS		 2808 return 0;
2809 }
2810
2811 rc = smb3_crypto_aead_allocate(server);
2812 if (rc) {
2813 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
2814 return rc;
2815 }
2816
2817 tfm = enc ? server->secmech.ccmaesencrypt :
2818 server->secmech.ccmaesdecrypt;
61cfac6f 2819 rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
026e93dc
PS		 2820 if (rc) {
2821 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
2822 return rc;
2823 }
2824
2825 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
2826 if (rc) {
2827 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
2828 return rc;
2829 }
2830
2831 req = aead_request_alloc(tfm, GFP_KERNEL);
2832 if (!req) {
2833 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
2834 return -ENOMEM;
2835 }
2836
2837 if (!enc) {
2838 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
2839 crypt_len += SMB2_SIGNATURE_SIZE;
2840 }
2841
b2c96de7 2842 sg = init_sg(num_rqst, rqst, sign);
026e93dc 2843 if (!sg) {
517a6e43
CJ		 2844 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
2845 rc = -ENOMEM;
026e93dc
PS		 2846 goto free_req;
2847 }
2848
2849 iv_len = crypto_aead_ivsize(tfm);
2850 iv = kzalloc(iv_len, GFP_KERNEL);
2851 if (!iv) {
2852 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
517a6e43 2853 rc = -ENOMEM;
026e93dc
PS		 2854 goto free_sg;
2855 }
2856 iv[0] = 3;
2857 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2858
2859 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
2860 aead_request_set_ad(req, assoc_data_len);
2861
2862 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
a5186b85 2863 crypto_req_done, &wait);
026e93dc 2864
a5186b85
GBY		 2865 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
2866 : crypto_aead_decrypt(req), &wait);
026e93dc
PS		 2867
2868 if (!rc && enc)
2869 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
2870
2871 kfree(iv);
2872free_sg:
2873 kfree(sg);
2874free_req:
2875 kfree(req);
2876 return rc;
2877}
2878
b2c96de7
RS		 2879void
2880smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
2881{
2882 int i, j;
2883
2884 for (i = 0; i < num_rqst; i++) {
2885 if (rqst[i].rq_pages) {
2886 for (j = rqst[i].rq_npages - 1; j >= 0; j--)
2887 put_page(rqst[i].rq_pages[j]);
2888 kfree(rqst[i].rq_pages);
2889 }
2890 }
2891}
2892
2893/*
2894 * This function will initialize new_rq and encrypt the content.
2895 * The first entry, new_rq[0], only contains a single iov which contains
2896 * a smb2_transform_hdr and is pre-allocated by the caller.
2897 * This function then populates new_rq[1+] with the content from olq_rq[0+].
2898 *
2899 * The end result is an array of smb_rqst structures where the first structure
2900 * only contains a single iov for the transform header which we then can pass
2901 * to crypt_message().
2902 *
2903 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller
2904 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
2905 */
026e93dc 2906static int
b2c96de7
RS		 2907smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
2908 struct smb_rqst *new_rq, struct smb_rqst *old_rq)
026e93dc 2909{
026e93dc 2910 struct page **pages;
b2c96de7
RS		 2911 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
2912 unsigned int npages;
2913 unsigned int orig_len = 0;
2914 int i, j;
026e93dc
PS		 2915 int rc = -ENOMEM;
2916
b2c96de7
RS		 2917 for (i = 1; i < num_rqst; i++) {
2918 npages = old_rq[i - 1].rq_npages;
2919 pages = kmalloc_array(npages, sizeof(struct page *),
2920 GFP_KERNEL);
2921 if (!pages)
2922 goto err_free;
2923
2924 new_rq[i].rq_pages = pages;
2925 new_rq[i].rq_npages = npages;
2926 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
2927 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
2928 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
2929 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
2930 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
2931
2932 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
2933
2934 for (j = 0; j < npages; j++) {
2935 pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2936 if (!pages[j])
2937 goto err_free;
2938 }
026e93dc 2939
b2c96de7
RS		 2940 /* copy pages form the old */
2941 for (j = 0; j < npages; j++) {
2942 char *dst, *src;
2943 unsigned int offset, len;
977b6170 2944
b2c96de7 2945 rqst_page_get_length(&new_rq[i], j, &len, &offset);
026e93dc 2946
b2c96de7
RS		 2947 dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
2948 src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
026e93dc 2949
b2c96de7
RS		 2950 memcpy(dst, src, len);
2951 kunmap(new_rq[i].rq_pages[j]);
2952 kunmap(old_rq[i - 1].rq_pages[j]);
2953 }
2954 }
35e2cc1b 2955
b2c96de7 2956 /* fill the 1st iov with a transform header */
977b6170 2957 fill_transform_hdr(tr_hdr, orig_len, old_rq);
d5f07fb3 2958
b2c96de7 2959 rc = crypt_message(server, num_rqst, new_rq, 1);
026e93dc
PS		 2960 cifs_dbg(FYI, "encrypt message returned %d", rc);
2961 if (rc)
b2c96de7 2962 goto err_free;
026e93dc
PS		 2963
2964 return rc;
2965
b2c96de7
RS		 2966err_free:
2967 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
026e93dc
PS		 2968 return rc;
2969}
2970
4326ed2f
PS		 2971static int
2972smb3_is_transform_hdr(void *buf)
2973{
2974 struct smb2_transform_hdr *trhdr = buf;
2975
2976 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
2977}
2978
2979static int
2980decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
2981 unsigned int buf_data_size, struct page **pages,
2982 unsigned int npages, unsigned int page_data_size)
2983{
c713c877 2984 struct kvec iov[2];
4326ed2f 2985 struct smb_rqst rqst = {NULL};
4326ed2f
PS		 2986 int rc;
2987
c713c877
RS		 2988 iov[0].iov_base = buf;
2989 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2990 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
2991 iov[1].iov_len = buf_data_size;
4326ed2f
PS		 2992
2993 rqst.rq_iov = iov;
c713c877 2994 rqst.rq_nvec = 2;
4326ed2f
PS		 2995 rqst.rq_pages = pages;
2996 rqst.rq_npages = npages;
2997 rqst.rq_pagesz = PAGE_SIZE;
2998 rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
2999
b2c96de7 3000 rc = crypt_message(server, 1, &rqst, 0);
4326ed2f
PS		 3001 cifs_dbg(FYI, "decrypt message returned %d\n", rc);
3002
3003 if (rc)
3004 return rc;
3005
c713c877 3006 memmove(buf, iov[1].iov_base, buf_data_size);
977b6170
RS		 3007
3008 server->total_read = buf_data_size + page_data_size;
4326ed2f
PS		 3009
3010 return rc;
3011}
3012
c42a6abe
PS		 3013static int
3014read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
3015 unsigned int npages, unsigned int len)
3016{
3017 int i;
3018 int length;
3019
3020 for (i = 0; i < npages; i++) {
3021 struct page *page = pages[i];
3022 size_t n;
3023
3024 n = len;
3025 if (len >= PAGE_SIZE) {
3026 /* enough data to fill the page */
3027 n = PAGE_SIZE;
3028 len -= n;
3029 } else {
3030 zero_user(page, len, PAGE_SIZE - len);
3031 len = 0;
3032 }
1dbe3466 3033 length = cifs_read_page_from_socket(server, page, 0, n);
c42a6abe
PS		 3034 if (length < 0)
3035 return length;
3036 server->total_read += length;
3037 }
3038
3039 return 0;
3040}
3041
3042static int
3043init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
3044 unsigned int cur_off, struct bio_vec **page_vec)
3045{
3046 struct bio_vec *bvec;
3047 int i;
3048
3049 bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
3050 if (!bvec)
3051 return -ENOMEM;
3052
3053 for (i = 0; i < npages; i++) {
3054 bvec[i].bv_page = pages[i];
3055 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
3056 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
3057 data_size -= bvec[i].bv_len;
3058 }
3059
3060 if (data_size != 0) {
3061 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
3062 kfree(bvec);
3063 return -EIO;
3064 }
3065
3066 *page_vec = bvec;
3067 return 0;
3068}
3069
4326ed2f
PS		 3070static int
3071handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
3072 char *buf, unsigned int buf_len, struct page **pages,
3073 unsigned int npages, unsigned int page_data_size)
3074{
3075 unsigned int data_offset;
3076 unsigned int data_len;
c42a6abe
PS		 3077 unsigned int cur_off;
3078 unsigned int cur_page_idx;
3079 unsigned int pad_len;
4326ed2f 3080 struct cifs_readdata *rdata = mid->callback_data;
49f466bd 3081 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
4326ed2f
PS		 3082 struct bio_vec *bvec = NULL;
3083 struct iov_iter iter;
3084 struct kvec iov;
3085 int length;
74dcf418 3086 bool use_rdma_mr = false;
4326ed2f
PS		 3087
3088 if (shdr->Command != SMB2_READ) {
3089 cifs_dbg(VFS, "only big read responses are supported\n");
3090 return -ENOTSUPP;
3091 }
3092
511c54a2
PS		 3093 if (server->ops->is_session_expired &&
3094 server->ops->is_session_expired(buf)) {
3095 cifs_reconnect(server);
3096 wake_up(&server->response_q);
3097 return -1;
3098 }
3099
4326ed2f
PS		 3100 if (server->ops->is_status_pending &&
3101 server->ops->is_status_pending(buf, server, 0))
3102 return -1;
3103
3104 rdata->result = server->ops->map_error(buf, false);
3105 if (rdata->result != 0) {
3106 cifs_dbg(FYI, "%s: server returned error %d\n",
3107 __func__, rdata->result);
3108 dequeue_mid(mid, rdata->result);
3109 return 0;
3110 }
3111
1fc6ad2f 3112 data_offset = server->ops->read_data_offset(buf);
74dcf418
LL		 3113#ifdef CONFIG_CIFS_SMB_DIRECT
3114 use_rdma_mr = rdata->mr;
3115#endif
3116 data_len = server->ops->read_data_length(buf, use_rdma_mr);
4326ed2f
PS		 3117
3118 if (data_offset < server->vals->read_rsp_size) {
3119 /*
3120 * win2k8 sometimes sends an offset of 0 when the read
3121 * is beyond the EOF. Treat it as if the data starts just after
3122 * the header.
3123 */
3124 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
3125 __func__, data_offset);
3126 data_offset = server->vals->read_rsp_size;
3127 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
3128 /* data_offset is beyond the end of smallbuf */
3129 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
3130 __func__, data_offset);
3131 rdata->result = -EIO;
3132 dequeue_mid(mid, rdata->result);
3133 return 0;
3134 }
3135
c42a6abe
PS		 3136 pad_len = data_offset - server->vals->read_rsp_size;
3137
4326ed2f
PS		 3138 if (buf_len <= data_offset) {
3139 /* read response payload is in pages */
c42a6abe
PS		 3140 cur_page_idx = pad_len / PAGE_SIZE;
3141 cur_off = pad_len % PAGE_SIZE;
3142
3143 if (cur_page_idx != 0) {
3144 /* data offset is beyond the 1st page of response */
3145 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
3146 __func__, data_offset);
3147 rdata->result = -EIO;
3148 dequeue_mid(mid, rdata->result);
3149 return 0;
3150 }
3151
3152 if (data_len > page_data_size - pad_len) {
3153 /* data_len is corrupt -- discard frame */
3154 rdata->result = -EIO;
3155 dequeue_mid(mid, rdata->result);
3156 return 0;
3157 }
3158
3159 rdata->result = init_read_bvec(pages, npages, page_data_size,
3160 cur_off, &bvec);
3161 if (rdata->result != 0) {
3162 dequeue_mid(mid, rdata->result);
3163 return 0;
3164 }
3165
aa563d7b 3166 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
4326ed2f
PS		 3167 } else if (buf_len >= data_offset + data_len) {
3168 /* read response payload is in buf */
3169 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
3170 iov.iov_base = buf + data_offset;
3171 iov.iov_len = data_len;
aa563d7b 3172 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
4326ed2f
PS		 3173 } else {
3174 /* read response payload cannot be in both buf and pages */
3175 WARN_ONCE(1, "buf can not contain only a part of read data");
3176 rdata->result = -EIO;
3177 dequeue_mid(mid, rdata->result);
3178 return 0;
3179 }
3180
3181 /* set up first iov for signature check */
3182 rdata->iov[0].iov_base = buf;
3183 rdata->iov[0].iov_len = 4;
3184 rdata->iov[1].iov_base = buf + 4;
3185 rdata->iov[1].iov_len = server->vals->read_rsp_size - 4;
3186 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
3187 rdata->iov[0].iov_base, server->vals->read_rsp_size);
3188
3189 length = rdata->copy_into_pages(server, rdata, &iter);
3190
3191 kfree(bvec);
3192
3193 if (length < 0)
3194 return length;
3195
3196 dequeue_mid(mid, false);
3197 return length;
3198}
3199
c42a6abe
PS		 3200static int
3201receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
3202{
3203 char *buf = server->smallbuf;
3204 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
3205 unsigned int npages;
3206 struct page **pages;
3207 unsigned int len;
1fc6ad2f 3208 unsigned int buflen = server->pdu_size;
c42a6abe
PS		 3209 int rc;
3210 int i = 0;
3211
1fc6ad2f 3212 len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
c42a6abe
PS		 3213 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
3214
3215 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
3216 if (rc < 0)
3217 return rc;
3218 server->total_read += rc;
3219
1fc6ad2f 3220 len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
93012bf9 3221 server->vals->read_rsp_size;
c42a6abe
PS		 3222 npages = DIV_ROUND_UP(len, PAGE_SIZE);
3223
3224 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
3225 if (!pages) {
3226 rc = -ENOMEM;
3227 goto discard_data;
3228 }
3229
3230 for (; i < npages; i++) {
3231 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
3232 if (!pages[i]) {
3233 rc = -ENOMEM;
3234 goto discard_data;
3235 }
3236 }
3237
3238 /* read read data into pages */
3239 rc = read_data_into_pages(server, pages, npages, len);
3240 if (rc)
3241 goto free_pages;
3242
350be257 3243 rc = cifs_discard_remaining_data(server);
c42a6abe
PS		 3244 if (rc)
3245 goto free_pages;
3246
1fc6ad2f 3247 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
c42a6abe
PS		 3248 pages, npages, len);
3249 if (rc)
3250 goto free_pages;
3251
3252 *mid = smb2_find_mid(server, buf);
3253 if (*mid == NULL)
3254 cifs_dbg(FYI, "mid not found\n");
3255 else {
3256 cifs_dbg(FYI, "mid found\n");
3257 (*mid)->decrypted = true;
3258 rc = handle_read_data(server, *mid, buf,
3259 server->vals->read_rsp_size,
3260 pages, npages, len);
3261 }
3262
3263free_pages:
3264 for (i = i - 1; i >= 0; i--)
3265 put_page(pages[i]);
3266 kfree(pages);
3267 return rc;
3268discard_data:
350be257 3269 cifs_discard_remaining_data(server);
c42a6abe
PS		 3270 goto free_pages;
3271}
3272
4326ed2f
PS		 3273static int
3274receive_encrypted_standard(struct TCP_Server_Info *server,
b24df3e3
RS		 3275 struct mid_q_entry **mids, char **bufs,
3276 int *num_mids)
4326ed2f 3277{
b24df3e3 3278 int ret, length;
4326ed2f 3279 char *buf = server->smallbuf;
b24df3e3
RS		 3280 char *tmpbuf;
3281 struct smb2_sync_hdr *shdr;
2e96467d 3282 unsigned int pdu_length = server->pdu_size;
4326ed2f
PS		 3283 unsigned int buf_size;
3284 struct mid_q_entry *mid_entry;
b24df3e3
RS		 3285 int next_is_large;
3286 char *next_buffer = NULL;
3287
3288 *num_mids = 0;
4326ed2f
PS		 3289
3290 /* switch to large buffer if too big for a small one */
1fc6ad2f 3291 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4326ed2f
PS		 3292 server->large_buf = true;
3293 memcpy(server->bigbuf, buf, server->total_read);
3294 buf = server->bigbuf;
3295 }
3296
3297 /* now read the rest */
3298 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
1fc6ad2f 3299 pdu_length - HEADER_SIZE(server) + 1);
4326ed2f
PS		 3300 if (length < 0)
3301 return length;
3302 server->total_read += length;
3303
1fc6ad2f 3304 buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4326ed2f
PS		 3305 length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
3306 if (length)
3307 return length;
3308
b24df3e3
RS		 3309 next_is_large = server->large_buf;
3310 one_more:
3311 shdr = (struct smb2_sync_hdr *)buf;
3312 if (shdr->NextCommand) {
3313 if (next_is_large) {
3314 tmpbuf = server->bigbuf;
3315 next_buffer = (char *)cifs_buf_get();
3316 } else {
3317 tmpbuf = server->smallbuf;
3318 next_buffer = (char *)cifs_small_buf_get();
3319 }
3320 memcpy(next_buffer,
3321 tmpbuf + le32_to_cpu(shdr->NextCommand),
3322 pdu_length - le32_to_cpu(shdr->NextCommand));
3323 }
3324
4326ed2f
PS		 3325 mid_entry = smb2_find_mid(server, buf);
3326 if (mid_entry == NULL)
3327 cifs_dbg(FYI, "mid not found\n");
3328 else {
3329 cifs_dbg(FYI, "mid found\n");
3330 mid_entry->decrypted = true;
b24df3e3 3331 mid_entry->resp_buf_size = server->pdu_size;
4326ed2f
PS		 3332 }
3333
b24df3e3
RS		 3334 if (*num_mids >= MAX_COMPOUND) {
3335 cifs_dbg(VFS, "too many PDUs in compound\n");
3336 return -1;
3337 }
3338 bufs[*num_mids] = buf;
3339 mids[(*num_mids)++] = mid_entry;
4326ed2f
PS		 3340
3341 if (mid_entry && mid_entry->handle)
b24df3e3
RS		 3342 ret = mid_entry->handle(server, mid_entry);
3343 else
3344 ret = cifs_handle_standard(server, mid_entry);
3345
3346 if (ret == 0 && shdr->NextCommand) {
3347 pdu_length -= le32_to_cpu(shdr->NextCommand);
3348 server->large_buf = next_is_large;
3349 if (next_is_large)
3350 server->bigbuf = next_buffer;
3351 else
3352 server->smallbuf = next_buffer;
3353
3354 buf += le32_to_cpu(shdr->NextCommand);
3355 goto one_more;
3356 }
4326ed2f 3357
b24df3e3 3358 return ret;
4326ed2f
PS		 3359}
3360
3361static int
b24df3e3
RS		 3362smb3_receive_transform(struct TCP_Server_Info *server,
3363 struct mid_q_entry **mids, char **bufs, int *num_mids)
4326ed2f
PS		 3364{
3365 char *buf = server->smallbuf;
2e96467d 3366 unsigned int pdu_length = server->pdu_size;
4326ed2f
PS		 3367 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
3368 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
3369
1fc6ad2f 3370 if (pdu_length < sizeof(struct smb2_transform_hdr) +
4326ed2f
PS		 3371 sizeof(struct smb2_sync_hdr)) {
3372 cifs_dbg(VFS, "Transform message is too small (%u)\n",
3373 pdu_length);
3374 cifs_reconnect(server);
3375 wake_up(&server->response_q);
3376 return -ECONNABORTED;
3377 }
3378
1fc6ad2f 3379 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4326ed2f
PS		 3380 cifs_dbg(VFS, "Transform message is broken\n");
3381 cifs_reconnect(server);
3382 wake_up(&server->response_q);
3383 return -ECONNABORTED;
3384 }
3385
b24df3e3 3386 /* TODO: add support for compounds containing READ. */
1fc6ad2f 3387 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
b24df3e3 3388 return receive_encrypted_read(server, &mids[0]);
4326ed2f 3389
b24df3e3 3390 return receive_encrypted_standard(server, mids, bufs, num_mids);
4326ed2f
PS		 3391}
3392
3393int
3394smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
3395{
3396 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
3397
1fc6ad2f 3398 return handle_read_data(server, mid, buf, server->pdu_size,
4326ed2f
PS		 3399 NULL, 0, 0);
3400}
3401
8ce79ec3
RS		 3402static int
3403smb2_next_header(char *buf)
3404{
3405 struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
3406 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
3407
3408 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
3409 return sizeof(struct smb2_transform_hdr) +
3410 le32_to_cpu(t_hdr->OriginalMessageSize);
3411
3412 return le32_to_cpu(hdr->NextCommand);
3413}
3414
53ef1016 3415struct smb_version_operations smb20_operations = {
027e8eec 3416 .compare_fids = smb2_compare_fids,
2dc7e1c0 3417 .setup_request = smb2_setup_request,
c95b8eed 3418 .setup_async_request = smb2_setup_async_request,
2dc7e1c0 3419 .check_receive = smb2_check_receive,
28ea5290
PS		 3420 .add_credits = smb2_add_credits,
3421 .set_credits = smb2_set_credits,
3422 .get_credits_field = smb2_get_credits_field,
3423 .get_credits = smb2_get_credits,
cb7e9eab 3424 .wait_mtu_credits = cifs_wait_mtu_credits,
2dc7e1c0 3425 .get_next_mid = smb2_get_next_mid,
09a4707e
PS		 3426 .read_data_offset = smb2_read_data_offset,
3427 .read_data_length = smb2_read_data_length,
3428 .map_error = map_smb2_to_linux_error,
093b2bda
PS		 3429 .find_mid = smb2_find_mid,
3430 .check_message = smb2_check_message,
3431 .dump_detail = smb2_dump_detail,
d60622eb
PS		 3432 .clear_stats = smb2_clear_stats,
3433 .print_stats = smb2_print_stats,
983c88a4 3434 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 3435 .handle_cancelled_mid = smb2_handle_cancelled_mid,
c11f1df5 3436 .downgrade_oplock = smb2_downgrade_oplock,
ec2e4523
PS		 3437 .need_neg = smb2_need_neg,
3438 .negotiate = smb2_negotiate,
3a3bab50
PS		 3439 .negotiate_wsize = smb2_negotiate_wsize,
3440 .negotiate_rsize = smb2_negotiate_rsize,
5478f9ba
PS		 3441 .sess_setup = SMB2_sess_setup,
3442 .logoff = SMB2_logoff,
faaf946a
PS		 3443 .tree_connect = SMB2_tcon,
3444 .tree_disconnect = SMB2_tdis,
34f62640 3445 .qfs_tcon = smb2_qfs_tcon,
2503a0db 3446 .is_path_accessible = smb2_is_path_accessible,
9094fad1
PS		 3447 .can_echo = smb2_can_echo,
3448 .echo = SMB2_echo,
be4cb9e3
PS		 3449 .query_path_info = smb2_query_path_info,
3450 .get_srv_inum = smb2_get_srv_inum,
b7546bc5 3451 .query_file_info = smb2_query_file_info,
c839ff24
PS		 3452 .set_path_size = smb2_set_path_size,
3453 .set_file_size = smb2_set_file_size,
1feeaac7 3454 .set_file_info = smb2_set_file_info,
64a5cfa6 3455 .set_compression = smb2_set_compression,
a0e73183
PS		 3456 .mkdir = smb2_mkdir,
3457 .mkdir_setinfo = smb2_mkdir_setinfo,
1a500f01 3458 .rmdir = smb2_rmdir,
cbe6f439 3459 .unlink = smb2_unlink,
35143eb5 3460 .rename = smb2_rename_path,
568798cc 3461 .create_hardlink = smb2_create_hardlink,
b42bf888 3462 .query_symlink = smb2_query_symlink,
5b23c97d
SP		 3463 .query_mf_symlink = smb3_query_mf_symlink,
3464 .create_mf_symlink = smb3_create_mf_symlink,
f0df737e
PS		 3465 .open = smb2_open_file,
3466 .set_fid = smb2_set_fid,
3467 .close = smb2_close_file,
7a5cfb19 3468 .flush = smb2_flush_file,
09a4707e 3469 .async_readv = smb2_async_readv,
33319141 3470 .async_writev = smb2_async_writev,
d8e05039 3471 .sync_read = smb2_sync_read,
009d3443 3472 .sync_write = smb2_sync_write,
d324f08d
PS		 3473 .query_dir_first = smb2_query_dir_first,
3474 .query_dir_next = smb2_query_dir_next,
3475 .close_dir = smb2_close_dir,
3476 .calc_smb_size = smb2_calc_size,
2e44b288 3477 .is_status_pending = smb2_is_status_pending,
511c54a2 3478 .is_session_expired = smb2_is_session_expired,
983c88a4 3479 .oplock_response = smb2_oplock_response,
6fc05c25 3480 .queryfs = smb2_queryfs,
f7ba7fe6
PS		 3481 .mand_lock = smb2_mand_lock,
3482 .mand_unlock_range = smb2_unlock_range,
b140799a 3483 .push_mand_locks = smb2_push_mandatory_locks,
b8c32dbb
PS		 3484 .get_lease_key = smb2_get_lease_key,
3485 .set_lease_key = smb2_set_lease_key,
3486 .new_lease_key = smb2_new_lease_key,
38107d45 3487 .calc_signature = smb2_calc_signature,
53ef1016
PS		 3488 .is_read_op = smb2_is_read_op,
3489 .set_oplock_level = smb2_set_oplock_level,
a41a28bd 3490 .create_lease_buf = smb2_create_lease_buf,
b5c7cde3 3491 .parse_lease_buf = smb2_parse_lease_buf,
312bbc59 3492 .copychunk_range = smb2_copychunk_range,
7f6c5008 3493 .wp_retry_size = smb2_wp_retry_size,
52755808 3494 .dir_needs_close = smb2_dir_needs_close,
9d49640a 3495 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 3496 .select_sectype = smb2_select_sectype,
95907fea
RS		 3497#ifdef CONFIG_CIFS_XATTR
3498 .query_all_EAs = smb2_query_eas,
5517554e 3499 .set_EA = smb2_set_ea,
95907fea 3500#endif /* CIFS_XATTR */
2f1afe25
SP		 3501#ifdef CONFIG_CIFS_ACL
3502 .get_acl = get_smb2_acl,
3503 .get_acl_by_fid = get_smb2_acl_by_fid,
366ed846 3504 .set_acl = set_smb2_acl,
2f1afe25 3505#endif /* CIFS_ACL */
8ce79ec3 3506 .next_header = smb2_next_header,
f5b05d62 3507 .ioctl_query_info = smb2_ioctl_query_info,
38107d45
SF		 3508};
3509
53ef1016
PS		 3510struct smb_version_operations smb21_operations = {
3511 .compare_fids = smb2_compare_fids,
3512 .setup_request = smb2_setup_request,
3513 .setup_async_request = smb2_setup_async_request,
3514 .check_receive = smb2_check_receive,
3515 .add_credits = smb2_add_credits,
3516 .set_credits = smb2_set_credits,
3517 .get_credits_field = smb2_get_credits_field,
3518 .get_credits = smb2_get_credits,
cb7e9eab 3519 .wait_mtu_credits = smb2_wait_mtu_credits,
53ef1016
PS		 3520 .get_next_mid = smb2_get_next_mid,
3521 .read_data_offset = smb2_read_data_offset,
3522 .read_data_length = smb2_read_data_length,
3523 .map_error = map_smb2_to_linux_error,
3524 .find_mid = smb2_find_mid,
3525 .check_message = smb2_check_message,
3526 .dump_detail = smb2_dump_detail,
3527 .clear_stats = smb2_clear_stats,
3528 .print_stats = smb2_print_stats,
3529 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 3530 .handle_cancelled_mid = smb2_handle_cancelled_mid,
c11f1df5 3531 .downgrade_oplock = smb2_downgrade_oplock,
53ef1016
PS		 3532 .need_neg = smb2_need_neg,
3533 .negotiate = smb2_negotiate,
3534 .negotiate_wsize = smb2_negotiate_wsize,
3535 .negotiate_rsize = smb2_negotiate_rsize,
3536 .sess_setup = SMB2_sess_setup,
3537 .logoff = SMB2_logoff,
3538 .tree_connect = SMB2_tcon,
3539 .tree_disconnect = SMB2_tdis,
34f62640 3540 .qfs_tcon = smb2_qfs_tcon,
53ef1016
PS		 3541 .is_path_accessible = smb2_is_path_accessible,
3542 .can_echo = smb2_can_echo,
3543 .echo = SMB2_echo,
3544 .query_path_info = smb2_query_path_info,
3545 .get_srv_inum = smb2_get_srv_inum,
3546 .query_file_info = smb2_query_file_info,
3547 .set_path_size = smb2_set_path_size,
3548 .set_file_size = smb2_set_file_size,
3549 .set_file_info = smb2_set_file_info,
64a5cfa6 3550 .set_compression = smb2_set_compression,
53ef1016
PS		 3551 .mkdir = smb2_mkdir,
3552 .mkdir_setinfo = smb2_mkdir_setinfo,
3553 .rmdir = smb2_rmdir,
3554 .unlink = smb2_unlink,
3555 .rename = smb2_rename_path,
3556 .create_hardlink = smb2_create_hardlink,
3557 .query_symlink = smb2_query_symlink,
c22870ea 3558 .query_mf_symlink = smb3_query_mf_symlink,
5ab97578 3559 .create_mf_symlink = smb3_create_mf_symlink,
53ef1016
PS		 3560 .open = smb2_open_file,
3561 .set_fid = smb2_set_fid,
3562 .close = smb2_close_file,
3563 .flush = smb2_flush_file,
3564 .async_readv = smb2_async_readv,
3565 .async_writev = smb2_async_writev,
3566 .sync_read = smb2_sync_read,
3567 .sync_write = smb2_sync_write,
3568 .query_dir_first = smb2_query_dir_first,
3569 .query_dir_next = smb2_query_dir_next,
3570 .close_dir = smb2_close_dir,
3571 .calc_smb_size = smb2_calc_size,
3572 .is_status_pending = smb2_is_status_pending,
511c54a2 3573 .is_session_expired = smb2_is_session_expired,
53ef1016
PS		 3574 .oplock_response = smb2_oplock_response,
3575 .queryfs = smb2_queryfs,
3576 .mand_lock = smb2_mand_lock,
3577 .mand_unlock_range = smb2_unlock_range,
3578 .push_mand_locks = smb2_push_mandatory_locks,
3579 .get_lease_key = smb2_get_lease_key,
3580 .set_lease_key = smb2_set_lease_key,
3581 .new_lease_key = smb2_new_lease_key,
3582 .calc_signature = smb2_calc_signature,
3583 .is_read_op = smb21_is_read_op,
3584 .set_oplock_level = smb21_set_oplock_level,
a41a28bd 3585 .create_lease_buf = smb2_create_lease_buf,
b5c7cde3 3586 .parse_lease_buf = smb2_parse_lease_buf,
312bbc59 3587 .copychunk_range = smb2_copychunk_range,
7f6c5008 3588 .wp_retry_size = smb2_wp_retry_size,
52755808 3589 .dir_needs_close = smb2_dir_needs_close,
834170c8 3590 .enum_snapshots = smb3_enum_snapshots,
9d49640a 3591 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 3592 .select_sectype = smb2_select_sectype,
95907fea
RS		 3593#ifdef CONFIG_CIFS_XATTR
3594 .query_all_EAs = smb2_query_eas,
5517554e 3595 .set_EA = smb2_set_ea,
95907fea 3596#endif /* CIFS_XATTR */
2f1afe25
SP		 3597#ifdef CONFIG_CIFS_ACL
3598 .get_acl = get_smb2_acl,
3599 .get_acl_by_fid = get_smb2_acl_by_fid,
366ed846 3600 .set_acl = set_smb2_acl,
2f1afe25 3601#endif /* CIFS_ACL */
8ce79ec3 3602 .next_header = smb2_next_header,
f5b05d62 3603 .ioctl_query_info = smb2_ioctl_query_info,
53ef1016 3604};
38107d45
SF		 3605
3606struct smb_version_operations smb30_operations = {
3607 .compare_fids = smb2_compare_fids,
3608 .setup_request = smb2_setup_request,
3609 .setup_async_request = smb2_setup_async_request,
3610 .check_receive = smb2_check_receive,
3611 .add_credits = smb2_add_credits,
3612 .set_credits = smb2_set_credits,
3613 .get_credits_field = smb2_get_credits_field,
3614 .get_credits = smb2_get_credits,
cb7e9eab 3615 .wait_mtu_credits = smb2_wait_mtu_credits,
38107d45
SF		 3616 .get_next_mid = smb2_get_next_mid,
3617 .read_data_offset = smb2_read_data_offset,
3618 .read_data_length = smb2_read_data_length,
3619 .map_error = map_smb2_to_linux_error,
3620 .find_mid = smb2_find_mid,
3621 .check_message = smb2_check_message,
3622 .dump_detail = smb2_dump_detail,
3623 .clear_stats = smb2_clear_stats,
3624 .print_stats = smb2_print_stats,
769ee6a4 3625 .dump_share_caps = smb2_dump_share_caps,
38107d45 3626 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 3627 .handle_cancelled_mid = smb2_handle_cancelled_mid,
c11f1df5 3628 .downgrade_oplock = smb2_downgrade_oplock,
38107d45
SF		 3629 .need_neg = smb2_need_neg,
3630 .negotiate = smb2_negotiate,
3d621230
SF		 3631 .negotiate_wsize = smb3_negotiate_wsize,
3632 .negotiate_rsize = smb3_negotiate_rsize,
38107d45
SF		 3633 .sess_setup = SMB2_sess_setup,
3634 .logoff = SMB2_logoff,
3635 .tree_connect = SMB2_tcon,
3636 .tree_disconnect = SMB2_tdis,
af6a12ea 3637 .qfs_tcon = smb3_qfs_tcon,
38107d45
SF		 3638 .is_path_accessible = smb2_is_path_accessible,
3639 .can_echo = smb2_can_echo,
3640 .echo = SMB2_echo,
3641 .query_path_info = smb2_query_path_info,
3642 .get_srv_inum = smb2_get_srv_inum,
3643 .query_file_info = smb2_query_file_info,
3644 .set_path_size = smb2_set_path_size,
3645 .set_file_size = smb2_set_file_size,
3646 .set_file_info = smb2_set_file_info,
64a5cfa6 3647 .set_compression = smb2_set_compression,
38107d45
SF		 3648 .mkdir = smb2_mkdir,
3649 .mkdir_setinfo = smb2_mkdir_setinfo,
3650 .rmdir = smb2_rmdir,
3651 .unlink = smb2_unlink,
3652 .rename = smb2_rename_path,
3653 .create_hardlink = smb2_create_hardlink,
b42bf888 3654 .query_symlink = smb2_query_symlink,
c22870ea 3655 .query_mf_symlink = smb3_query_mf_symlink,
5ab97578 3656 .create_mf_symlink = smb3_create_mf_symlink,
38107d45
SF		 3657 .open = smb2_open_file,
3658 .set_fid = smb2_set_fid,
3659 .close = smb2_close_file,
3660 .flush = smb2_flush_file,
3661 .async_readv = smb2_async_readv,
3662 .async_writev = smb2_async_writev,
3663 .sync_read = smb2_sync_read,
3664 .sync_write = smb2_sync_write,
3665 .query_dir_first = smb2_query_dir_first,
3666 .query_dir_next = smb2_query_dir_next,
3667 .close_dir = smb2_close_dir,
3668 .calc_smb_size = smb2_calc_size,
3669 .is_status_pending = smb2_is_status_pending,
511c54a2 3670 .is_session_expired = smb2_is_session_expired,
38107d45
SF		 3671 .oplock_response = smb2_oplock_response,
3672 .queryfs = smb2_queryfs,
3673 .mand_lock = smb2_mand_lock,
3674 .mand_unlock_range = smb2_unlock_range,
3675 .push_mand_locks = smb2_push_mandatory_locks,
3676 .get_lease_key = smb2_get_lease_key,
3677 .set_lease_key = smb2_set_lease_key,
3678 .new_lease_key = smb2_new_lease_key,
373512ec 3679 .generate_signingkey = generate_smb30signingkey,
38107d45 3680 .calc_signature = smb3_calc_signature,
b3152e2c 3681 .set_integrity = smb3_set_integrity,
53ef1016 3682 .is_read_op = smb21_is_read_op,
42873b0a 3683 .set_oplock_level = smb3_set_oplock_level,
f047390a
PS		 3684 .create_lease_buf = smb3_create_lease_buf,
3685 .parse_lease_buf = smb3_parse_lease_buf,
312bbc59 3686 .copychunk_range = smb2_copychunk_range,
ca9e7a1c 3687 .duplicate_extents = smb2_duplicate_extents,
ff1c038a 3688 .validate_negotiate = smb3_validate_negotiate,
7f6c5008 3689 .wp_retry_size = smb2_wp_retry_size,
52755808 3690 .dir_needs_close = smb2_dir_needs_close,
31742c5a 3691 .fallocate = smb3_fallocate,
834170c8 3692 .enum_snapshots = smb3_enum_snapshots,
026e93dc 3693 .init_transform_rq = smb3_init_transform_rq,
4326ed2f
PS		 3694 .is_transform_hdr = smb3_is_transform_hdr,
3695 .receive_transform = smb3_receive_transform,
9d49640a 3696 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 3697 .select_sectype = smb2_select_sectype,
95907fea
RS		 3698#ifdef CONFIG_CIFS_XATTR
3699 .query_all_EAs = smb2_query_eas,
5517554e 3700 .set_EA = smb2_set_ea,
95907fea 3701#endif /* CIFS_XATTR */
2f1afe25
SP		 3702#ifdef CONFIG_CIFS_ACL
3703 .get_acl = get_smb2_acl,
3704 .get_acl_by_fid = get_smb2_acl_by_fid,
366ed846 3705 .set_acl = set_smb2_acl,
2f1afe25 3706#endif /* CIFS_ACL */
8ce79ec3 3707 .next_header = smb2_next_header,
f5b05d62 3708 .ioctl_query_info = smb2_ioctl_query_info,
1080ef75
SF		 3709};
3710
aab1893d
SF		 3711struct smb_version_operations smb311_operations = {
3712 .compare_fids = smb2_compare_fids,
3713 .setup_request = smb2_setup_request,
3714 .setup_async_request = smb2_setup_async_request,
3715 .check_receive = smb2_check_receive,
3716 .add_credits = smb2_add_credits,
3717 .set_credits = smb2_set_credits,
3718 .get_credits_field = smb2_get_credits_field,
3719 .get_credits = smb2_get_credits,
3720 .wait_mtu_credits = smb2_wait_mtu_credits,
3721 .get_next_mid = smb2_get_next_mid,
3722 .read_data_offset = smb2_read_data_offset,
3723 .read_data_length = smb2_read_data_length,
3724 .map_error = map_smb2_to_linux_error,
3725 .find_mid = smb2_find_mid,
3726 .check_message = smb2_check_message,
3727 .dump_detail = smb2_dump_detail,
3728 .clear_stats = smb2_clear_stats,
3729 .print_stats = smb2_print_stats,
3730 .dump_share_caps = smb2_dump_share_caps,
3731 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 3732 .handle_cancelled_mid = smb2_handle_cancelled_mid,
aab1893d
SF		 3733 .downgrade_oplock = smb2_downgrade_oplock,
3734 .need_neg = smb2_need_neg,
3735 .negotiate = smb2_negotiate,
3d621230
SF		 3736 .negotiate_wsize = smb3_negotiate_wsize,
3737 .negotiate_rsize = smb3_negotiate_rsize,
aab1893d
SF		 3738 .sess_setup = SMB2_sess_setup,
3739 .logoff = SMB2_logoff,
3740 .tree_connect = SMB2_tcon,
3741 .tree_disconnect = SMB2_tdis,
3742 .qfs_tcon = smb3_qfs_tcon,
3743 .is_path_accessible = smb2_is_path_accessible,
3744 .can_echo = smb2_can_echo,
3745 .echo = SMB2_echo,
3746 .query_path_info = smb2_query_path_info,
3747 .get_srv_inum = smb2_get_srv_inum,
3748 .query_file_info = smb2_query_file_info,
3749 .set_path_size = smb2_set_path_size,
3750 .set_file_size = smb2_set_file_size,
3751 .set_file_info = smb2_set_file_info,
3752 .set_compression = smb2_set_compression,
3753 .mkdir = smb2_mkdir,
3754 .mkdir_setinfo = smb2_mkdir_setinfo,
bea851b8 3755 .posix_mkdir = smb311_posix_mkdir,
aab1893d
SF		 3756 .rmdir = smb2_rmdir,
3757 .unlink = smb2_unlink,
3758 .rename = smb2_rename_path,
3759 .create_hardlink = smb2_create_hardlink,
3760 .query_symlink = smb2_query_symlink,
3761 .query_mf_symlink = smb3_query_mf_symlink,
3762 .create_mf_symlink = smb3_create_mf_symlink,
3763 .open = smb2_open_file,
3764 .set_fid = smb2_set_fid,
3765 .close = smb2_close_file,
3766 .flush = smb2_flush_file,
3767 .async_readv = smb2_async_readv,
3768 .async_writev = smb2_async_writev,
3769 .sync_read = smb2_sync_read,
3770 .sync_write = smb2_sync_write,
3771 .query_dir_first = smb2_query_dir_first,
3772 .query_dir_next = smb2_query_dir_next,
3773 .close_dir = smb2_close_dir,
3774 .calc_smb_size = smb2_calc_size,
3775 .is_status_pending = smb2_is_status_pending,
511c54a2 3776 .is_session_expired = smb2_is_session_expired,
aab1893d 3777 .oplock_response = smb2_oplock_response,
2d304217 3778 .queryfs = smb311_queryfs,
aab1893d
SF		 3779 .mand_lock = smb2_mand_lock,
3780 .mand_unlock_range = smb2_unlock_range,
3781 .push_mand_locks = smb2_push_mandatory_locks,
3782 .get_lease_key = smb2_get_lease_key,
3783 .set_lease_key = smb2_set_lease_key,
3784 .new_lease_key = smb2_new_lease_key,
373512ec 3785 .generate_signingkey = generate_smb311signingkey,
aab1893d 3786 .calc_signature = smb3_calc_signature,
b3152e2c 3787 .set_integrity = smb3_set_integrity,
aab1893d
SF		 3788 .is_read_op = smb21_is_read_op,
3789 .set_oplock_level = smb3_set_oplock_level,
3790 .create_lease_buf = smb3_create_lease_buf,
3791 .parse_lease_buf = smb3_parse_lease_buf,
312bbc59 3792 .copychunk_range = smb2_copychunk_range,
02b16665 3793 .duplicate_extents = smb2_duplicate_extents,
aab1893d
SF		 3794/* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
3795 .wp_retry_size = smb2_wp_retry_size,
3796 .dir_needs_close = smb2_dir_needs_close,
3797 .fallocate = smb3_fallocate,
834170c8 3798 .enum_snapshots = smb3_enum_snapshots,
026e93dc 3799 .init_transform_rq = smb3_init_transform_rq,
4326ed2f
PS		 3800 .is_transform_hdr = smb3_is_transform_hdr,
3801 .receive_transform = smb3_receive_transform,
9d49640a 3802 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 3803 .select_sectype = smb2_select_sectype,
95907fea
RS		 3804#ifdef CONFIG_CIFS_XATTR
3805 .query_all_EAs = smb2_query_eas,
5517554e 3806 .set_EA = smb2_set_ea,
95907fea 3807#endif /* CIFS_XATTR */
c1777df1
RS		 3808#ifdef CONFIG_CIFS_ACL
3809 .get_acl = get_smb2_acl,
3810 .get_acl_by_fid = get_smb2_acl_by_fid,
3811 .set_acl = set_smb2_acl,
3812#endif /* CIFS_ACL */
8ce79ec3 3813 .next_header = smb2_next_header,
f5b05d62 3814 .ioctl_query_info = smb2_ioctl_query_info,
aab1893d 3815};
aab1893d 3816
dd446b16
SF		 3817struct smb_version_values smb20_values = {
3818 .version_string = SMB20_VERSION_STRING,
3819 .protocol_id = SMB20_PROT_ID,
3820 .req_capabilities = 0, /* MBZ */
3821 .large_lock_type = 0,
3822 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3823 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3824 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3825 .header_size = sizeof(struct smb2_sync_hdr),
3826 .header_preamble_size = 0,
dd446b16
SF		 3827 .max_header_size = MAX_SMB2_HDR_SIZE,
3828 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3829 .lock_cmd = SMB2_LOCK,
3830 .cap_unix = 0,
3831 .cap_nt_find = SMB2_NT_FIND,
3832 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 3833 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3834 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
a41a28bd 3835 .create_lease_size = sizeof(struct create_lease),
dd446b16
SF		 3836};
3837
1080ef75
SF		 3838struct smb_version_values smb21_values = {
3839 .version_string = SMB21_VERSION_STRING,
e4aa25e7
SF		 3840 .protocol_id = SMB21_PROT_ID,
3841 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
3842 .large_lock_type = 0,
3843 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3844 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3845 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3846 .header_size = sizeof(struct smb2_sync_hdr),
3847 .header_preamble_size = 0,
e4aa25e7
SF		 3848 .max_header_size = MAX_SMB2_HDR_SIZE,
3849 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3850 .lock_cmd = SMB2_LOCK,
3851 .cap_unix = 0,
3852 .cap_nt_find = SMB2_NT_FIND,
3853 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 3854 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3855 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
a41a28bd 3856 .create_lease_size = sizeof(struct create_lease),
e4aa25e7
SF		 3857};
3858
9764c02f
SF		 3859struct smb_version_values smb3any_values = {
3860 .version_string = SMB3ANY_VERSION_STRING,
3861 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
f8015683 3862 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
9764c02f
SF		 3863 .large_lock_type = 0,
3864 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3865 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3866 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3867 .header_size = sizeof(struct smb2_sync_hdr),
3868 .header_preamble_size = 0,
9764c02f
SF		 3869 .max_header_size = MAX_SMB2_HDR_SIZE,
3870 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3871 .lock_cmd = SMB2_LOCK,
3872 .cap_unix = 0,
3873 .cap_nt_find = SMB2_NT_FIND,
3874 .cap_large_files = SMB2_LARGE_FILES,
3875 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3876 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3877 .create_lease_size = sizeof(struct create_lease_v2),
3878};
3879
3880struct smb_version_values smbdefault_values = {
3881 .version_string = SMBDEFAULT_VERSION_STRING,
3882 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
f8015683 3883 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
9764c02f
SF		 3884 .large_lock_type = 0,
3885 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3886 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3887 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3888 .header_size = sizeof(struct smb2_sync_hdr),
3889 .header_preamble_size = 0,
9764c02f
SF		 3890 .max_header_size = MAX_SMB2_HDR_SIZE,
3891 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3892 .lock_cmd = SMB2_LOCK,
3893 .cap_unix = 0,
3894 .cap_nt_find = SMB2_NT_FIND,
3895 .cap_large_files = SMB2_LARGE_FILES,
3896 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3897 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3898 .create_lease_size = sizeof(struct create_lease_v2),
3899};
3900
e4aa25e7
SF		 3901struct smb_version_values smb30_values = {
3902 .version_string = SMB30_VERSION_STRING,
3903 .protocol_id = SMB30_PROT_ID,
f8015683 3904 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
027e8eec
PS		 3905 .large_lock_type = 0,
3906 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3907 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3908 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3909 .header_size = sizeof(struct smb2_sync_hdr),
3910 .header_preamble_size = 0,
093b2bda 3911 .max_header_size = MAX_SMB2_HDR_SIZE,
09a4707e 3912 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2dc7e1c0 3913 .lock_cmd = SMB2_LOCK,
29e20f9c
PS		 3914 .cap_unix = 0,
3915 .cap_nt_find = SMB2_NT_FIND,
3916 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 3917 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3918 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
f047390a 3919 .create_lease_size = sizeof(struct create_lease_v2),
1080ef75 3920};
20b6d8b4
SF		 3921
3922struct smb_version_values smb302_values = {
3923 .version_string = SMB302_VERSION_STRING,
3924 .protocol_id = SMB302_PROT_ID,
f8015683 3925 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
20b6d8b4
SF		 3926 .large_lock_type = 0,
3927 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3928 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3929 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3930 .header_size = sizeof(struct smb2_sync_hdr),
3931 .header_preamble_size = 0,
20b6d8b4
SF		 3932 .max_header_size = MAX_SMB2_HDR_SIZE,
3933 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3934 .lock_cmd = SMB2_LOCK,
3935 .cap_unix = 0,
3936 .cap_nt_find = SMB2_NT_FIND,
3937 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 3938 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3939 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
f047390a 3940 .create_lease_size = sizeof(struct create_lease_v2),
20b6d8b4 3941};
5f7fbf73 3942
5f7fbf73
SF		 3943struct smb_version_values smb311_values = {
3944 .version_string = SMB311_VERSION_STRING,
3945 .protocol_id = SMB311_PROT_ID,
f8015683 3946 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5f7fbf73
SF		 3947 .large_lock_type = 0,
3948 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3949 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3950 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3951 .header_size = sizeof(struct smb2_sync_hdr),
3952 .header_preamble_size = 0,
5f7fbf73
SF		 3953 .max_header_size = MAX_SMB2_HDR_SIZE,
3954 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3955 .lock_cmd = SMB2_LOCK,
3956 .cap_unix = 0,
3957 .cap_nt_find = SMB2_NT_FIND,
3958 .cap_large_files = SMB2_LARGE_FILES,
3959 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3960 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3961 .create_lease_size = sizeof(struct create_lease_v2),
3962};
Linux 6.x block layer and io_uring tree(s)