projects / linux-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Linux 5.2
[linux-block.git] / fs / cifs / smb2pdu.c
CommitLineData
ec2e4523
PS		 1/*
2 * fs/cifs/smb2pdu.c
3 *
2b80d049 4 * Copyright (C) International Business Machines Corp., 2009, 2013
ec2e4523
PS		 5 * Etersoft, 2012
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
8 *
9 * Contains the routines for constructing the SMB2 PDUs themselves
10 *
11 * This library is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published
13 * by the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
15 *
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
19 * the GNU Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 */
25
26 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
27 /* Note that there are handle based routines which must be */
28 /* treated slightly differently for reconnection purposes since we never */
29 /* want to reuse a stale file handle and only the caller knows the file info */
30
31#include <linux/fs.h>
32#include <linux/kernel.h>
33#include <linux/vfs.h>
09a4707e 34#include <linux/task_io_accounting_ops.h>
ec2e4523 35#include <linux/uaccess.h>
c6e970a0 36#include <linux/uuid.h>
33319141 37#include <linux/pagemap.h>
ec2e4523
PS		 38#include <linux/xattr.h>
39#include "smb2pdu.h"
40#include "cifsglob.h"
41#include "cifsacl.h"
42#include "cifsproto.h"
43#include "smb2proto.h"
44#include "cifs_unicode.h"
45#include "cifs_debug.h"
46#include "ntlmssp.h"
47#include "smb2status.h"
09a4707e 48#include "smb2glob.h"
d324f08d 49#include "cifspdu.h"
ceb1b0b9 50#include "cifs_spnego.h"
db223a59 51#include "smbdirect.h"
eccb4422 52#include "trace.h"
a3a53b76
PA		 53#ifdef CONFIG_CIFS_DFS_UPCALL
54#include "dfs_cache.h"
55#endif
ec2e4523
PS		 56
57/*
58 * The following table defines the expected "StructureSize" of SMB2 requests
59 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
60 *
61 * Note that commands are defined in smb2pdu.h in le16 but the array below is
62 * indexed by command in host byte order.
63 */
64static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
65 /* SMB2_NEGOTIATE */ 36,
66 /* SMB2_SESSION_SETUP */ 25,
67 /* SMB2_LOGOFF */ 4,
68 /* SMB2_TREE_CONNECT */ 9,
69 /* SMB2_TREE_DISCONNECT */ 4,
70 /* SMB2_CREATE */ 57,
71 /* SMB2_CLOSE */ 24,
72 /* SMB2_FLUSH */ 24,
73 /* SMB2_READ */ 49,
74 /* SMB2_WRITE */ 49,
75 /* SMB2_LOCK */ 48,
76 /* SMB2_IOCTL */ 57,
77 /* SMB2_CANCEL */ 4,
78 /* SMB2_ECHO */ 4,
79 /* SMB2_QUERY_DIRECTORY */ 33,
80 /* SMB2_CHANGE_NOTIFY */ 32,
81 /* SMB2_QUERY_INFO */ 41,
82 /* SMB2_SET_INFO */ 33,
83 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
84};
85
730928c8 86int smb3_encryption_required(const struct cifs_tcon *tcon)
7fb8986e 87{
ae6f8dd4
PS		 88 if (!tcon)
89 return 0;
7fb8986e
PS		 90 if ((tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
91 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
92 return 1;
ae6f8dd4
PS		 93 if (tcon->seal &&
94 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
95 return 1;
7fb8986e
PS		 96 return 0;
97}
ec2e4523
PS		 98
99static void
cb200bd6 100smb2_hdr_assemble(struct smb2_sync_hdr *shdr, __le16 smb2_cmd,
ec2e4523
PS		 101 const struct cifs_tcon *tcon)
102{
31473fc4
PS		 103 shdr->ProtocolId = SMB2_PROTO_NUMBER;
104 shdr->StructureSize = cpu_to_le16(64);
105 shdr->Command = smb2_cmd;
7d414f39
RL		 106 if (tcon && tcon->ses && tcon->ses->server) {
107 struct TCP_Server_Info *server = tcon->ses->server;
108
109 spin_lock(&server->req_lock);
69dc4b18 110 /* Request up to 10 credits but don't go over the limit. */
141891f4 111 if (server->credits >= server->max_credits)
31473fc4 112 shdr->CreditRequest = cpu_to_le16(0);
7d414f39 113 else
31473fc4 114 shdr->CreditRequest = cpu_to_le16(
141891f4 115 min_t(int, server->max_credits -
69dc4b18 116 server->credits, 10));
7d414f39
RL		 117 spin_unlock(&server->req_lock);
118 } else {
31473fc4 119 shdr->CreditRequest = cpu_to_le16(2);
7d414f39 120 }
31473fc4 121 shdr->ProcessId = cpu_to_le32((__u16)current->tgid);
ec2e4523
PS		 122
123 if (!tcon)
124 goto out;
125
2b80d049
SF		 126 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
127 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
1dc92c45 128 if ((tcon->ses) && (tcon->ses->server) &&
84ceeb96 129 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
31473fc4 130 shdr->CreditCharge = cpu_to_le16(1);
2b80d049
SF		 131 /* else CreditCharge MBZ */
132
31473fc4 133 shdr->TreeId = tcon->tid;
ec2e4523
PS		 134 /* Uid is not converted */
135 if (tcon->ses)
31473fc4 136 shdr->SessionId = tcon->ses->Suid;
f87ab88b
SF		 137
138 /*
139 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
140 * to pass the path on the Open SMB prefixed by \\server\share.
141 * Not sure when we would need to do the augmented path (if ever) and
142 * setting this flag breaks the SMB2 open operation since it is
143 * illegal to send an empty path name (without \\server\share prefix)
144 * when the DFS flag is set in the SMB open header. We could
145 * consider setting the flag on all operations other than open
146 * but it is safer to net set it for now.
147 */
148/* if (tcon->share_flags & SHI1005_FLAGS_DFS)
31473fc4 149 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
f87ab88b 150
7fb8986e 151 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign &&
5a77e75f 152 !smb3_encryption_required(tcon))
31473fc4 153 shdr->Flags |= SMB2_FLAGS_SIGNED;
ec2e4523 154out:
ec2e4523
PS		 155 return;
156}
157
a3a53b76
PA		 158#ifdef CONFIG_CIFS_DFS_UPCALL
159static int __smb2_reconnect(const struct nls_table *nlsc,
160 struct cifs_tcon *tcon)
161{
162 int rc;
163 struct dfs_cache_tgt_list tl;
164 struct dfs_cache_tgt_iterator *it = NULL;
15bc77f9 165 char *tree;
a3a53b76
PA		 166 const char *tcp_host;
167 size_t tcp_host_len;
168 const char *dfs_host;
169 size_t dfs_host_len;
170
15bc77f9
AA		 171 tree = kzalloc(MAX_TREE_SIZE, GFP_KERNEL);
172 if (!tree)
173 return -ENOMEM;
174
a3a53b76 175 if (tcon->ipc) {
74ea5f98
RS		 176 scnprintf(tree, MAX_TREE_SIZE, "\\\\%s\\IPC$",
177 tcon->ses->server->hostname);
15bc77f9
AA		 178 rc = SMB2_tcon(0, tcon->ses, tree, tcon, nlsc);
179 goto out;
a3a53b76
PA		 180 }
181
15bc77f9
AA		 182 if (!tcon->dfs_path) {
183 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nlsc);
184 goto out;
185 }
a3a53b76
PA		 186
187 rc = dfs_cache_noreq_find(tcon->dfs_path + 1, NULL, &tl);
188 if (rc)
15bc77f9 189 goto out;
a3a53b76
PA		 190
191 extract_unc_hostname(tcon->ses->server->hostname, &tcp_host,
192 &tcp_host_len);
193
194 for (it = dfs_cache_get_tgt_iterator(&tl); it;
195 it = dfs_cache_get_next_tgt(&tl, it)) {
196 const char *tgt = dfs_cache_get_tgt_name(it);
197
198 extract_unc_hostname(tgt, &dfs_host, &dfs_host_len);
199
200 if (dfs_host_len != tcp_host_len
201 || strncasecmp(dfs_host, tcp_host, dfs_host_len) != 0) {
202 cifs_dbg(FYI, "%s: skipping %.*s, doesn't match %.*s",
203 __func__,
204 (int)dfs_host_len, dfs_host,
205 (int)tcp_host_len, tcp_host);
206 continue;
207 }
208
74ea5f98 209 scnprintf(tree, MAX_TREE_SIZE, "\\%s", tgt);
a3a53b76
PA		 210
211 rc = SMB2_tcon(0, tcon->ses, tree, tcon, nlsc);
212 if (!rc)
213 break;
214 if (rc == -EREMOTE)
215 break;
216 }
217
218 if (!rc) {
219 if (it)
220 rc = dfs_cache_noreq_update_tgthint(tcon->dfs_path + 1,
221 it);
222 else
223 rc = -ENOENT;
224 }
225 dfs_cache_free_tgts(&tl);
15bc77f9
AA		 226out:
227 kfree(tree);
a3a53b76
PA		 228 return rc;
229}
230#else
231static inline int __smb2_reconnect(const struct nls_table *nlsc,
232 struct cifs_tcon *tcon)
233{
234 return SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nlsc);
235}
236#endif
237
ec2e4523
PS		 238static int
239smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
240{
7ffbe655 241 int rc;
aa24d1e9
PS		 242 struct nls_table *nls_codepage;
243 struct cifs_ses *ses;
244 struct TCP_Server_Info *server;
a3a53b76 245 int retries;
aa24d1e9
PS		 246
247 /*
248 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
249 * check for tcp and smb session status done differently
250 * for those three - in the calling routine.
251 */
252 if (tcon == NULL)
7ffbe655 253 return 0;
aa24d1e9
PS		 254
255 if (smb2_command == SMB2_TREE_CONNECT)
7ffbe655 256 return 0;
aa24d1e9
PS		 257
258 if (tcon->tidStatus == CifsExiting) {
259 /*
260 * only tree disconnect, open, and write,
261 * (and ulogoff which does not have tcon)
262 * are allowed as we start force umount.
263 */
264 if ((smb2_command != SMB2_WRITE) &&
265 (smb2_command != SMB2_CREATE) &&
266 (smb2_command != SMB2_TREE_DISCONNECT)) {
f96637be
JP		 267 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
268 smb2_command);
aa24d1e9
PS		 269 return -ENODEV;
270 }
271 }
272 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
273 (!tcon->ses->server))
274 return -EIO;
275
276 ses = tcon->ses;
277 server = ses->server;
278
a3a53b76
PA		 279 retries = server->nr_targets;
280
aa24d1e9 281 /*
a3a53b76
PA		 282 * Give demultiplex thread up to 10 seconds to each target available for
283 * reconnect -- should be greater than cifs socket timeout which is 7
284 * seconds.
aa24d1e9
PS		 285 */
286 while (server->tcpStatus == CifsNeedReconnect) {
287 /*
288 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
289 * here since they are implicitly done when session drops.
290 */
291 switch (smb2_command) {
292 /*
293 * BB Should we keep oplock break and add flush to exceptions?
294 */
295 case SMB2_TREE_DISCONNECT:
296 case SMB2_CANCEL:
297 case SMB2_CLOSE:
298 case SMB2_OPLOCK_BREAK:
299 return -EAGAIN;
300 }
301
7ffbe655
PA		 302 rc = wait_event_interruptible_timeout(server->response_q,
303 (server->tcpStatus != CifsNeedReconnect),
304 10 * HZ);
305 if (rc < 0) {
306 cifs_dbg(FYI, "%s: aborting reconnect due to a received"
307 " signal by the process\n", __func__);
308 return -ERESTARTSYS;
309 }
aa24d1e9
PS		 310
311 /* are we still trying to reconnect? */
312 if (server->tcpStatus != CifsNeedReconnect)
313 break;
314
a3a53b76
PA		 315 if (--retries)
316 continue;
317
aa24d1e9
PS		 318 /*
319 * on "soft" mounts we wait once. Hard mounts keep
320 * retrying until process is killed or server comes
321 * back on-line
322 */
323 if (!tcon->retry) {
f96637be 324 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
aa24d1e9
PS		 325 return -EHOSTDOWN;
326 }
a3a53b76 327 retries = server->nr_targets;
aa24d1e9
PS		 328 }
329
330 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
7ffbe655 331 return 0;
aa24d1e9
PS		 332
333 nls_codepage = load_nls_default();
334
335 /*
336 * need to prevent multiple threads trying to simultaneously reconnect
337 * the same SMB session
338 */
339 mutex_lock(&tcon->ses->session_mutex);
76e75270
SC		 340
341 /*
342 * Recheck after acquire mutex. If another thread is negotiating
343 * and the server never sends an answer the socket will be closed
344 * and tcpStatus set to reconnect.
345 */
346 if (server->tcpStatus == CifsNeedReconnect) {
347 rc = -EHOSTDOWN;
348 mutex_unlock(&tcon->ses->session_mutex);
349 goto out;
350 }
351
aa24d1e9
PS		 352 rc = cifs_negotiate_protocol(0, tcon->ses);
353 if (!rc && tcon->ses->need_reconnect)
354 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
355
356 if (rc || !tcon->need_reconnect) {
357 mutex_unlock(&tcon->ses->session_mutex);
358 goto out;
359 }
360
361 cifs_mark_open_files_invalid(tcon);
96a988ff
PS		 362 if (tcon->use_persistent)
363 tcon->need_reopen_files = true;
52ace1ef 364
a3a53b76 365 rc = __smb2_reconnect(nls_codepage, tcon);
aa24d1e9 366 mutex_unlock(&tcon->ses->session_mutex);
52ace1ef 367
f96637be 368 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
c318e6c2
SF		 369 if (rc) {
370 /* If sess reconnected but tcon didn't, something strange ... */
371 printk_once(KERN_WARNING "reconnect tcon failed rc = %d\n", rc);
aa24d1e9 372 goto out;
c318e6c2 373 }
96a988ff
PS		 374
375 if (smb2_command != SMB2_INTERNAL_CMD)
376 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
377
aa24d1e9 378 atomic_inc(&tconInfoReconnectCount);
aa24d1e9
PS		 379out:
380 /*
381 * Check if handle based operation so we know whether we can continue
382 * or not without returning to caller to reset file handle.
383 */
384 /*
385 * BB Is flush done by server on drop of tcp session? Should we special
386 * case it and skip above?
387 */
388 switch (smb2_command) {
389 case SMB2_FLUSH:
390 case SMB2_READ:
391 case SMB2_WRITE:
392 case SMB2_LOCK:
393 case SMB2_IOCTL:
394 case SMB2_QUERY_DIRECTORY:
395 case SMB2_CHANGE_NOTIFY:
396 case SMB2_QUERY_INFO:
397 case SMB2_SET_INFO:
4772c795 398 rc = -EAGAIN;
aa24d1e9
PS		 399 }
400 unload_nls(nls_codepage);
ec2e4523
PS		 401 return rc;
402}
403
cb200bd6
PS		 404static void
405fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, void *buf,
406 unsigned int *total_len)
407{
408 struct smb2_sync_pdu *spdu = (struct smb2_sync_pdu *)buf;
409 /* lookup word count ie StructureSize from table */
410 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)];
411
412 /*
413 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
414 * largest operations (Create)
415 */
416 memset(buf, 0, 256);
417
418 smb2_hdr_assemble(&spdu->sync_hdr, smb2_command, tcon);
419 spdu->StructureSize2 = cpu_to_le16(parmsize);
420
421 *total_len = parmsize + sizeof(struct smb2_sync_hdr);
422}
423
ec2e4523
PS		 424/*
425 * Allocate and return pointer to an SMB request hdr, and set basic
426 * SMB information in the SMB header. If the return code is zero, this
305428ac 427 * function must have filled in request_buf pointer.
ec2e4523
PS		 428 */
429static int
305428ac
RS		 430smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
431 void **request_buf, unsigned int *total_len)
ec2e4523 432{
cb200bd6 433 int rc;
ec2e4523
PS		 434
435 rc = smb2_reconnect(smb2_command, tcon);
436 if (rc)
437 return rc;
438
439 /* BB eventually switch this to SMB2 specific small buf size */
f46ecbd9
SB		 440 if (smb2_command == SMB2_SET_INFO)
441 *request_buf = cifs_buf_get();
442 else
443 *request_buf = cifs_small_buf_get();
ec2e4523
PS		 444 if (*request_buf == NULL) {
445 /* BB should we add a retry in here if not a writepage? */
446 return -ENOMEM;
447 }
448
305428ac
RS		 449 fill_small_buf(smb2_command, tcon,
450 (struct smb2_sync_hdr *)(*request_buf),
451 total_len);
ec2e4523
PS		 452
453 if (tcon != NULL) {
ec2e4523
PS		 454 uint16_t com_code = le16_to_cpu(smb2_command);
455 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
ec2e4523
PS		 456 cifs_stats_inc(&tcon->num_smbs_sent);
457 }
458
459 return rc;
460}
461
d7bef4c4 462/* For explanation of negotiate contexts see MS-SMB2 section 2.2.3.1 */
ebb3a9d4
SF		 463
464static void
465build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
466{
467 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
468 pneg_ctxt->DataLength = cpu_to_le16(38);
469 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
470 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
471 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
472 pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
473}
474
26ea888f
SF		 475static void
476build_compression_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt)
477{
478 pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES;
479 pneg_ctxt->DataLength =
480 cpu_to_le16(sizeof(struct smb2_compression_capabilities_context)
481 - sizeof(struct smb2_neg_context));
482 pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(3);
483 pneg_ctxt->CompressionAlgorithms[0] = SMB3_COMPRESS_LZ77;
484 pneg_ctxt->CompressionAlgorithms[1] = SMB3_COMPRESS_LZ77_HUFF;
485 pneg_ctxt->CompressionAlgorithms[2] = SMB3_COMPRESS_LZNT1;
486}
487
ebb3a9d4
SF		 488static void
489build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
490{
491 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
23657ad7
SF		 492 pneg_ctxt->DataLength = cpu_to_le16(4); /* Cipher Count + le16 cipher */
493 pneg_ctxt->CipherCount = cpu_to_le16(1);
494/* pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;*/ /* not supported yet */
495 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_CCM;
ebb3a9d4
SF		 496}
497
fcef0db6
SF		 498static void
499build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
500{
501 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
502 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
0d481325
SF		 503 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
504 pneg_ctxt->Name[0] = 0x93;
505 pneg_ctxt->Name[1] = 0xAD;
506 pneg_ctxt->Name[2] = 0x25;
507 pneg_ctxt->Name[3] = 0x50;
508 pneg_ctxt->Name[4] = 0x9C;
509 pneg_ctxt->Name[5] = 0xB4;
510 pneg_ctxt->Name[6] = 0x11;
511 pneg_ctxt->Name[7] = 0xE7;
512 pneg_ctxt->Name[8] = 0xB4;
513 pneg_ctxt->Name[9] = 0x23;
514 pneg_ctxt->Name[10] = 0x83;
515 pneg_ctxt->Name[11] = 0xDE;
516 pneg_ctxt->Name[12] = 0x96;
517 pneg_ctxt->Name[13] = 0x8B;
518 pneg_ctxt->Name[14] = 0xCD;
519 pneg_ctxt->Name[15] = 0x7C;
fcef0db6
SF		 520}
521
ebb3a9d4 522static void
13cacea7
RS		 523assemble_neg_contexts(struct smb2_negotiate_req *req,
524 unsigned int *total_len)
ebb3a9d4 525{
d5c7076b 526 char *pneg_ctxt = (char *)req;
fcef0db6 527 unsigned int ctxt_len;
ebb3a9d4 528
d5c7076b
SF		 529 if (*total_len > 200) {
530 /* In case length corrupted don't want to overrun smb buffer */
531 cifs_dbg(VFS, "Bad frame length assembling neg contexts\n");
532 return;
533 }
534
535 /*
536 * round up total_len of fixed part of SMB3 negotiate request to 8
537 * byte boundary before adding negotiate contexts
538 */
539 *total_len = roundup(*total_len, 8);
540
541 pneg_ctxt = (*total_len) + (char *)req;
542 req->NegotiateContextOffset = cpu_to_le32(*total_len);
543
ebb3a9d4 544 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
fcef0db6
SF		 545 ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_preauth_neg_context), 8) * 8;
546 *total_len += ctxt_len;
547 pneg_ctxt += ctxt_len;
13cacea7 548
ebb3a9d4 549 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
fcef0db6
SF		 550 ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_encryption_neg_context), 8) * 8;
551 *total_len += ctxt_len;
552 pneg_ctxt += ctxt_len;
553
26ea888f
SF		 554 build_compression_ctxt((struct smb2_compression_capabilities_context *)
555 pneg_ctxt);
556 ctxt_len = DIV_ROUND_UP(
557 sizeof(struct smb2_compression_capabilities_context), 8) * 8;
558 *total_len += ctxt_len;
559 pneg_ctxt += ctxt_len;
560
fcef0db6
SF		 561 build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
562 *total_len += sizeof(struct smb2_posix_neg_context);
13cacea7 563
26ea888f 564 req->NegotiateContextCount = cpu_to_le16(4);
ebb3a9d4 565}
5100d8a3
SF		 566
567static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt)
568{
569 unsigned int len = le16_to_cpu(ctxt->DataLength);
570
571 /* If invalid preauth context warn but use what we requested, SHA-512 */
572 if (len < MIN_PREAUTH_CTXT_DATA_LEN) {
573 printk_once(KERN_WARNING "server sent bad preauth context\n");
574 return;
575 }
576 if (le16_to_cpu(ctxt->HashAlgorithmCount) != 1)
577 printk_once(KERN_WARNING "illegal SMB3 hash algorithm count\n");
578 if (ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
579 printk_once(KERN_WARNING "unknown SMB3 hash algorithm\n");
580}
581
26ea888f
SF		 582static void decode_compress_ctx(struct TCP_Server_Info *server,
583 struct smb2_compression_capabilities_context *ctxt)
584{
585 unsigned int len = le16_to_cpu(ctxt->DataLength);
586
587 /* sizeof compress context is a one element compression capbility struct */
588 if (len < 10) {
589 printk_once(KERN_WARNING "server sent bad compression cntxt\n");
590 return;
591 }
592 if (le16_to_cpu(ctxt->CompressionAlgorithmCount) != 1) {
593 printk_once(KERN_WARNING "illegal SMB3 compress algorithm count\n");
594 return;
595 }
596 if (le16_to_cpu(ctxt->CompressionAlgorithms[0]) > 3) {
597 printk_once(KERN_WARNING "unknown compression algorithm\n");
598 return;
599 }
600 server->compress_algorithm = ctxt->CompressionAlgorithms[0];
601}
602
5100d8a3
SF		 603static int decode_encrypt_ctx(struct TCP_Server_Info *server,
604 struct smb2_encryption_neg_context *ctxt)
605{
606 unsigned int len = le16_to_cpu(ctxt->DataLength);
607
608 cifs_dbg(FYI, "decode SMB3.11 encryption neg context of len %d\n", len);
609 if (len < MIN_ENCRYPT_CTXT_DATA_LEN) {
610 printk_once(KERN_WARNING "server sent bad crypto ctxt len\n");
611 return -EINVAL;
612 }
613
614 if (le16_to_cpu(ctxt->CipherCount) != 1) {
615 printk_once(KERN_WARNING "illegal SMB3.11 cipher count\n");
616 return -EINVAL;
617 }
618 cifs_dbg(FYI, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt->Ciphers[0]));
619 if ((ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_CCM) &&
620 (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_GCM)) {
621 printk_once(KERN_WARNING "invalid SMB3.11 cipher returned\n");
622 return -EINVAL;
623 }
624 server->cipher_type = ctxt->Ciphers[0];
23657ad7 625 server->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
5100d8a3
SF		 626 return 0;
627}
628
629static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp,
977b6170
RS		 630 struct TCP_Server_Info *server,
631 unsigned int len_of_smb)
5100d8a3
SF		 632{
633 struct smb2_neg_context *pctx;
634 unsigned int offset = le32_to_cpu(rsp->NegotiateContextOffset);
635 unsigned int ctxt_cnt = le16_to_cpu(rsp->NegotiateContextCount);
5100d8a3
SF		 636 unsigned int len_of_ctxts, i;
637 int rc = 0;
638
639 cifs_dbg(FYI, "decoding %d negotiate contexts\n", ctxt_cnt);
640 if (len_of_smb <= offset) {
641 cifs_dbg(VFS, "Invalid response: negotiate context offset\n");
642 return -EINVAL;
643 }
644
645 len_of_ctxts = len_of_smb - offset;
646
647 for (i = 0; i < ctxt_cnt; i++) {
648 int clen;
649 /* check that offset is not beyond end of SMB */
650 if (len_of_ctxts == 0)
651 break;
652
653 if (len_of_ctxts < sizeof(struct smb2_neg_context))
654 break;
655
1fc6ad2f 656 pctx = (struct smb2_neg_context *)(offset + (char *)rsp);
5100d8a3
SF		 657 clen = le16_to_cpu(pctx->DataLength);
658 if (clen > len_of_ctxts)
659 break;
660
661 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES)
662 decode_preauth_context(
663 (struct smb2_preauth_neg_context *)pctx);
664 else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES)
665 rc = decode_encrypt_ctx(server,
666 (struct smb2_encryption_neg_context *)pctx);
26ea888f
SF		 667 else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES)
668 decode_compress_ctx(server,
669 (struct smb2_compression_capabilities_context *)pctx);
fcef0db6
SF		 670 else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE)
671 server->posix_ext_supported = true;
5100d8a3
SF		 672 else
673 cifs_dbg(VFS, "unknown negcontext of type %d ignored\n",
674 le16_to_cpu(pctx->ContextType));
675
676 if (rc)
677 break;
678 /* offsets must be 8 byte aligned */
679 clen = (clen + 7) & ~0x7;
680 offset += clen + sizeof(struct smb2_neg_context);
681 len_of_ctxts -= clen;
682 }
683 return rc;
684}
685
ce558b0e
SF		 686static struct create_posix *
687create_posix_buf(umode_t mode)
688{
689 struct create_posix *buf;
690
691 buf = kzalloc(sizeof(struct create_posix),
692 GFP_KERNEL);
693 if (!buf)
694 return NULL;
695
696 buf->ccontext.DataOffset =
697 cpu_to_le16(offsetof(struct create_posix, Mode));
698 buf->ccontext.DataLength = cpu_to_le32(4);
699 buf->ccontext.NameOffset =
700 cpu_to_le16(offsetof(struct create_posix, Name));
701 buf->ccontext.NameLength = cpu_to_le16(16);
702
703 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
704 buf->Name[0] = 0x93;
705 buf->Name[1] = 0xAD;
706 buf->Name[2] = 0x25;
707 buf->Name[3] = 0x50;
708 buf->Name[4] = 0x9C;
709 buf->Name[5] = 0xB4;
710 buf->Name[6] = 0x11;
711 buf->Name[7] = 0xE7;
712 buf->Name[8] = 0xB4;
713 buf->Name[9] = 0x23;
714 buf->Name[10] = 0x83;
715 buf->Name[11] = 0xDE;
716 buf->Name[12] = 0x96;
717 buf->Name[13] = 0x8B;
718 buf->Name[14] = 0xCD;
719 buf->Name[15] = 0x7C;
720 buf->Mode = cpu_to_le32(mode);
721 cifs_dbg(FYI, "mode on posix create 0%o", mode);
722 return buf;
723}
724
725static int
726add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode)
727{
728 struct smb2_create_req *req = iov[0].iov_base;
729 unsigned int num = *num_iovec;
730
731 iov[num].iov_base = create_posix_buf(mode);
732 if (iov[num].iov_base == NULL)
733 return -ENOMEM;
734 iov[num].iov_len = sizeof(struct create_posix);
735 if (!req->CreateContextsOffset)
736 req->CreateContextsOffset = cpu_to_le32(
737 sizeof(struct smb2_create_req) +
738 iov[num - 1].iov_len);
739 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_posix));
740 *num_iovec = num + 1;
741 return 0;
742}
743
ebb3a9d4 744
ec2e4523
PS		 745/*
746 *
747 * SMB2 Worker functions follow:
748 *
749 * The general structure of the worker functions is:
750 * 1) Call smb2_init (assembles SMB2 header)
751 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
752 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
753 * 4) Decode SMB2 command specific fields in the fixed length area
754 * 5) Decode variable length data area (if any for this SMB2 command type)
755 * 6) Call free smb buffer
756 * 7) return
757 *
758 */
759
760int
761SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
762{
40eff45b 763 struct smb_rqst rqst;
ec2e4523
PS		 764 struct smb2_negotiate_req *req;
765 struct smb2_negotiate_rsp *rsp;
766 struct kvec iov[1];
da502f7d 767 struct kvec rsp_iov;
ec2e4523
PS		 768 int rc = 0;
769 int resp_buftype;
3534b850 770 struct TCP_Server_Info *server = ses->server;
ec2e4523
PS		 771 int blob_offset, blob_length;
772 char *security_blob;
773 int flags = CIFS_NEG_OP;
13cacea7 774 unsigned int total_len;
ec2e4523 775
f96637be 776 cifs_dbg(FYI, "Negotiate protocol\n");
ec2e4523 777
3534b850
JL		 778 if (!server) {
779 WARN(1, "%s: server is NULL!\n", __func__);
780 return -EIO;
ec2e4523
PS		 781 }
782
13cacea7 783 rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, (void **) &req, &total_len);
ec2e4523
PS		 784 if (rc)
785 return rc;
786
13cacea7 787 req->sync_hdr.SessionId = 0;
0fdfef9a 788
8bd68c6e
AA		 789 memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
790 memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
ec2e4523 791
9764c02f
SF		 792 if (strcmp(ses->server->vals->version_string,
793 SMB3ANY_VERSION_STRING) == 0) {
794 req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
795 req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
796 req->DialectCount = cpu_to_le16(2);
13cacea7 797 total_len += 4;
9764c02f
SF		 798 } else if (strcmp(ses->server->vals->version_string,
799 SMBDEFAULT_VERSION_STRING) == 0) {
800 req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
801 req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
802 req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
d5c7076b
SF		 803 req->Dialects[3] = cpu_to_le16(SMB311_PROT_ID);
804 req->DialectCount = cpu_to_le16(4);
805 total_len += 8;
9764c02f
SF		 806 } else {
807 /* otherwise send specific dialect */
808 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
809 req->DialectCount = cpu_to_le16(1);
13cacea7 810 total_len += 2;
9764c02f 811 }
ec2e4523
PS		 812
813 /* only one of SMB2 signing flags may be set in SMB2 request */
38d77c50 814 if (ses->sign)
9cd2e62c 815 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
38d77c50 816 else if (global_secflags & CIFSSEC_MAY_SIGN)
9cd2e62c 817 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
38d77c50
JL		 818 else
819 req->SecurityMode = 0;
ec2e4523 820
e4aa25e7 821 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
ec2e4523 822
3c5f9be1
SF		 823 /* ClientGUID must be zero for SMB2.02 dialect */
824 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
825 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
ebb3a9d4 826 else {
3c5f9be1
SF		 827 memcpy(req->ClientGUID, server->client_guid,
828 SMB2_CLIENT_GUID_SIZE);
d5c7076b
SF		 829 if ((ses->server->vals->protocol_id == SMB311_PROT_ID) ||
830 (strcmp(ses->server->vals->version_string,
831 SMBDEFAULT_VERSION_STRING) == 0))
13cacea7 832 assemble_neg_contexts(req, &total_len);
ebb3a9d4 833 }
ec2e4523 834 iov[0].iov_base = (char *)req;
13cacea7 835 iov[0].iov_len = total_len;
ec2e4523 836
40eff45b
RS		 837 memset(&rqst, 0, sizeof(struct smb_rqst));
838 rqst.rq_iov = iov;
839 rqst.rq_nvec = 1;
840
841 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 842 cifs_small_buf_release(req);
843 rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base;
ec2e4523
PS		 844 /*
845 * No tcon so can't do
846 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
847 */
7e682f76
SF		 848 if (rc == -EOPNOTSUPP) {
849 cifs_dbg(VFS, "Dialect not supported by server. Consider "
9764c02f 850 "specifying vers=1.0 or vers=2.0 on mount for accessing"
7e682f76
SF		 851 " older servers\n");
852 goto neg_exit;
853 } else if (rc != 0)
ec2e4523
PS		 854 goto neg_exit;
855
9764c02f
SF		 856 if (strcmp(ses->server->vals->version_string,
857 SMB3ANY_VERSION_STRING) == 0) {
858 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
859 cifs_dbg(VFS,
860 "SMB2 dialect returned but not requested\n");
861 return -EIO;
862 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
863 cifs_dbg(VFS,
864 "SMB2.1 dialect returned but not requested\n");
865 return -EIO;
866 }
867 } else if (strcmp(ses->server->vals->version_string,
868 SMBDEFAULT_VERSION_STRING) == 0) {
869 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
870 cifs_dbg(VFS,
871 "SMB2 dialect returned but not requested\n");
872 return -EIO;
873 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
874 /* ops set to 3.0 by default for default so update */
875 ses->server->ops = &smb21_operations;
b57a55e2
Z		 876 ses->server->vals = &smb21_values;
877 } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
d5c7076b 878 ses->server->ops = &smb311_operations;
b57a55e2
Z		 879 ses->server->vals = &smb311_values;
880 }
590d08d3
SF		 881 } else if (le16_to_cpu(rsp->DialectRevision) !=
882 ses->server->vals->protocol_id) {
9764c02f
SF		 883 /* if requested single dialect ensure returned dialect matched */
884 cifs_dbg(VFS, "Illegal 0x%x dialect returned: not requested\n",
590d08d3 885 le16_to_cpu(rsp->DialectRevision));
9764c02f
SF		 886 return -EIO;
887 }
888
f96637be 889 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
ec2e4523 890
e4aa25e7 891 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
f96637be 892 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
e4aa25e7 893 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
f96637be 894 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
e4aa25e7 895 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
f96637be 896 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
20b6d8b4
SF		 897 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
898 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
5f7fbf73
SF		 899 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
900 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
ec2e4523 901 else {
f799d623 902 cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
f96637be 903 le16_to_cpu(rsp->DialectRevision));
ec2e4523
PS		 904 rc = -EIO;
905 goto neg_exit;
906 }
907 server->dialect = le16_to_cpu(rsp->DialectRevision);
908
8bd68c6e
AA		 909 /*
910 * Keep a copy of the hash after negprot. This hash will be
911 * the starting hash value for all sessions made from this
912 * server.
913 */
914 memcpy(server->preauth_sha_hash, ses->preauth_sha_hash,
915 SMB2_PREAUTH_HASH_SIZE);
0fdfef9a 916
e598d1d8
JL		 917 /* SMB2 only has an extended negflavor */
918 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
2365c4ea
PS		 919 /* set it to the maximum buffer size value we can send with 1 credit */
920 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
921 SMB2_MAX_BUFFER_SIZE);
ec2e4523
PS		 922 server->max_read = le32_to_cpu(rsp->MaxReadSize);
923 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
ec2e4523 924 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
07108d0e
SF		 925 if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode)
926 cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n",
927 server->sec_mode);
ec2e4523 928 server->capabilities = le32_to_cpu(rsp->Capabilities);
29e20f9c
PS		 929 /* Internal types */
930 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
ec2e4523
PS		 931
932 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
49f466bd 933 (struct smb2_sync_hdr *)rsp);
5d875cc9
SF		 934 /*
935 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
936 * for us will be
937 * ses->sectype = RawNTLMSSP;
938 * but for time being this is our only auth choice so doesn't matter.
939 * We just found a server which sets blob length to zero expecting raw.
940 */
67dbea2c 941 if (blob_length == 0) {
5d875cc9 942 cifs_dbg(FYI, "missing security blob on negprot\n");
67dbea2c
PS		 943 server->sec_ntlmssp = true;
944 }
3c1bf7e4 945
38d77c50 946 rc = cifs_enable_signing(server, ses->sign);
9ddec561
JL		 947 if (rc)
948 goto neg_exit;
ceb1b0b9 949 if (blob_length) {
ebdd207e 950 rc = decode_negTokenInit(security_blob, blob_length, server);
ceb1b0b9
SF		 951 if (rc == 1)
952 rc = 0;
953 else if (rc == 0)
954 rc = -EIO;
ec2e4523 955 }
5100d8a3 956
5100d8a3
SF		 957 if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
958 if (rsp->NegotiateContextCount)
977b6170
RS		 959 rc = smb311_decode_neg_context(rsp, server,
960 rsp_iov.iov_len);
5100d8a3
SF		 961 else
962 cifs_dbg(VFS, "Missing expected negotiate contexts\n");
963 }
ec2e4523
PS		 964neg_exit:
965 free_rsp_buf(resp_buftype, rsp);
966 return rc;
967}
5478f9ba 968
ff1c038a
SF		 969int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
970{
2796d303
LL		 971 int rc;
972 struct validate_negotiate_info_req *pneg_inbuf;
fe83bebc 973 struct validate_negotiate_info_rsp *pneg_rsp = NULL;
ff1c038a 974 u32 rsplen;
9764c02f 975 u32 inbuflen; /* max of 4 dialects */
ff1c038a
SF		 976
977 cifs_dbg(FYI, "validate negotiate\n");
978
8bd68c6e
AA		 979 /* In SMB3.11 preauth integrity supersedes validate negotiate */
980 if (tcon->ses->server->dialect == SMB311_PROT_ID)
981 return 0;
982
ff1c038a
SF		 983 /*
984 * validation ioctl must be signed, so no point sending this if we
0603c96f
SF		 985 * can not sign it (ie are not known user). Even if signing is not
986 * required (enabled but not negotiated), in those cases we selectively
ff1c038a 987 * sign just this, the first and only signed request on a connection.
0603c96f 988 * Having validation of negotiate info helps reduce attack vectors.
ff1c038a 989 */
0603c96f 990 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
ff1c038a
SF		 991 return 0; /* validation requires signing */
992
0603c96f
SF		 993 if (tcon->ses->user_name == NULL) {
994 cifs_dbg(FYI, "Can't validate negotiate: null user mount\n");
995 return 0; /* validation requires signing */
996 }
997
998 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
999 cifs_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n");
1000
2796d303
LL		 1001 pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS);
1002 if (!pneg_inbuf)
1003 return -ENOMEM;
1004
1005 pneg_inbuf->Capabilities =
ff1c038a 1006 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
2796d303 1007 memcpy(pneg_inbuf->Guid, tcon->ses->server->client_guid,
39552ea8 1008 SMB2_CLIENT_GUID_SIZE);
ff1c038a
SF		 1009
1010 if (tcon->ses->sign)
2796d303 1011 pneg_inbuf->SecurityMode =
ff1c038a
SF		 1012 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
1013 else if (global_secflags & CIFSSEC_MAY_SIGN)
2796d303 1014 pneg_inbuf->SecurityMode =
ff1c038a
SF		 1015 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
1016 else
2796d303 1017 pneg_inbuf->SecurityMode = 0;
ff1c038a 1018
9764c02f
SF		 1019
1020 if (strcmp(tcon->ses->server->vals->version_string,
1021 SMB3ANY_VERSION_STRING) == 0) {
2796d303
LL		 1022 pneg_inbuf->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
1023 pneg_inbuf->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
1024 pneg_inbuf->DialectCount = cpu_to_le16(2);
9764c02f 1025 /* structure is big enough for 3 dialects, sending only 2 */
2796d303 1026 inbuflen = sizeof(*pneg_inbuf) -
d5c7076b 1027 (2 * sizeof(pneg_inbuf->Dialects[0]));
9764c02f
SF		 1028 } else if (strcmp(tcon->ses->server->vals->version_string,
1029 SMBDEFAULT_VERSION_STRING) == 0) {
2796d303
LL		 1030 pneg_inbuf->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
1031 pneg_inbuf->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
1032 pneg_inbuf->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
d5c7076b
SF		 1033 pneg_inbuf->Dialects[3] = cpu_to_le16(SMB311_PROT_ID);
1034 pneg_inbuf->DialectCount = cpu_to_le16(4);
9764c02f 1035 /* structure is big enough for 3 dialects */
2796d303 1036 inbuflen = sizeof(*pneg_inbuf);
9764c02f
SF		 1037 } else {
1038 /* otherwise specific dialect was requested */
2796d303 1039 pneg_inbuf->Dialects[0] =
9764c02f 1040 cpu_to_le16(tcon->ses->server->vals->protocol_id);
2796d303 1041 pneg_inbuf->DialectCount = cpu_to_le16(1);
9764c02f 1042 /* structure is big enough for 3 dialects, sending only 1 */
2796d303
LL		 1043 inbuflen = sizeof(*pneg_inbuf) -
1044 sizeof(pneg_inbuf->Dialects[0]) * 2;
9764c02f 1045 }
ff1c038a
SF		 1046
1047 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1048 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
153322f7
SF		 1049 (char *)pneg_inbuf, inbuflen, CIFSMaxBufSize,
1050 (char **)&pneg_rsp, &rsplen);
969ae8e8
NJ		 1051 if (rc == -EOPNOTSUPP) {
1052 /*
1053 * Old Windows versions or Netapp SMB server can return
1054 * not supported error. Client should accept it.
1055 */
1056 cifs_dbg(VFS, "Server does not support validate negotiate\n");
21078203
CIK		 1057 rc = 0;
1058 goto out_free_inbuf;
969ae8e8 1059 } else if (rc != 0) {
ff1c038a 1060 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
2796d303
LL		 1061 rc = -EIO;
1062 goto out_free_inbuf;
ff1c038a
SF		 1063 }
1064
2796d303
LL		 1065 rc = -EIO;
1066 if (rsplen != sizeof(*pneg_rsp)) {
7db0a6ef
SF		 1067 cifs_dbg(VFS, "invalid protocol negotiate response size: %d\n",
1068 rsplen);
1069
1070 /* relax check since Mac returns max bufsize allowed on ioctl */
2796d303
LL		 1071 if (rsplen > CIFSMaxBufSize || rsplen < sizeof(*pneg_rsp))
1072 goto out_free_rsp;
ff1c038a
SF		 1073 }
1074
1075 /* check validate negotiate info response matches what we got earlier */
9aca7e45 1076 if (pneg_rsp->Dialect != cpu_to_le16(tcon->ses->server->dialect))
ff1c038a
SF		 1077 goto vneg_out;
1078
1079 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
1080 goto vneg_out;
1081
1082 /* do not validate server guid because not saved at negprot time yet */
1083
1084 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
1085 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
1086 goto vneg_out;
1087
1088 /* validate negotiate successful */
2796d303 1089 rc = 0;
ff1c038a 1090 cifs_dbg(FYI, "validate negotiate info successful\n");
2796d303 1091 goto out_free_rsp;
ff1c038a
SF		 1092
1093vneg_out:
1094 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
2796d303 1095out_free_rsp:
fe83bebc 1096 kfree(pneg_rsp);
2796d303
LL		 1097out_free_inbuf:
1098 kfree(pneg_inbuf);
1099 return rc;
ff1c038a
SF		 1100}
1101
ef65aaed
SP		 1102enum securityEnum
1103smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
1104{
1105 switch (requested) {
1106 case Kerberos:
1107 case RawNTLMSSP:
1108 return requested;
1109 case NTLMv2:
1110 return RawNTLMSSP;
1111 case Unspecified:
1112 if (server->sec_ntlmssp &&
1113 (global_secflags & CIFSSEC_MAY_NTLMSSP))
1114 return RawNTLMSSP;
1115 if ((server->sec_kerberos || server->sec_mskerberos) &&
1116 (global_secflags & CIFSSEC_MAY_KRB5))
1117 return Kerberos;
1118 /* Fallthrough */
1119 default:
1120 return Unspecified;
1121 }
1122}
1123
3baf1a7b
SP		 1124struct SMB2_sess_data {
1125 unsigned int xid;
1126 struct cifs_ses *ses;
1127 struct nls_table *nls_cp;
1128 void (*func)(struct SMB2_sess_data *);
1129 int result;
1130 u64 previous_session;
1131
1132 /* we will send the SMB in three pieces:
1133 * a fixed length beginning part, an optional
1134 * SPNEGO blob (which can be zero length), and a
1135 * last part which will include the strings
1136 * and rest of bcc area. This allows us to avoid
1137 * a large buffer 17K allocation
1138 */
1139 int buf0_type;
1140 struct kvec iov[2];
1141};
1142
1143static int
1144SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
1145{
1146 int rc;
1147 struct cifs_ses *ses = sess_data->ses;
1148 struct smb2_sess_setup_req *req;
1149 struct TCP_Server_Info *server = ses->server;
88ea5cb7 1150 unsigned int total_len;
3baf1a7b 1151
88ea5cb7
RS		 1152 rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, (void **) &req,
1153 &total_len);
3baf1a7b
SP		 1154 if (rc)
1155 return rc;
1156
31473fc4 1157 /* First session, not a reauthenticate */
88ea5cb7 1158 req->sync_hdr.SessionId = 0;
3baf1a7b
SP		 1159
1160 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
1161 req->PreviousSessionId = sess_data->previous_session;
1162
1163 req->Flags = 0; /* MBZ */
d409014e
SF		 1164
1165 /* enough to enable echos and oplocks and one max size write */
1166 req->sync_hdr.CreditRequest = cpu_to_le16(130);
3baf1a7b
SP		 1167
1168 /* only one of SMB2 signing flags may be set in SMB2 request */
1169 if (server->sign)
1170 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
1171 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
1172 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
1173 else
1174 req->SecurityMode = 0;
1175
1176 req->Capabilities = 0;
1177 req->Channel = 0; /* MBZ */
1178
1179 sess_data->iov[0].iov_base = (char *)req;
88ea5cb7
RS		 1180 /* 1 for pad */
1181 sess_data->iov[0].iov_len = total_len - 1;
3baf1a7b
SP		 1182 /*
1183 * This variable will be used to clear the buffer
1184 * allocated above in case of any error in the calling function.
1185 */
1186 sess_data->buf0_type = CIFS_SMALL_BUFFER;
1187
1188 return 0;
1189}
1190
1191static void
1192SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
1193{
1194 free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
1195 sess_data->buf0_type = CIFS_NO_BUFFER;
1196}
1197
1198static int
1199SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
1200{
1201 int rc;
40eff45b 1202 struct smb_rqst rqst;
3baf1a7b 1203 struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
da502f7d 1204 struct kvec rsp_iov = { NULL, 0 };
3baf1a7b
SP		 1205
1206 /* Testing shows that buffer offset must be at location of Buffer[0] */
1207 req->SecurityBufferOffset =
88ea5cb7 1208 cpu_to_le16(sizeof(struct smb2_sess_setup_req) - 1 /* pad */);
3baf1a7b
SP		 1209 req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
1210
40eff45b
RS		 1211 memset(&rqst, 0, sizeof(struct smb_rqst));
1212 rqst.rq_iov = sess_data->iov;
1213 rqst.rq_nvec = 2;
3baf1a7b 1214
40eff45b
RS		 1215 /* BB add code to build os and lm fields */
1216 rc = cifs_send_recv(sess_data->xid, sess_data->ses,
1217 &rqst,
88ea5cb7
RS		 1218 &sess_data->buf0_type,
1219 CIFS_LOG_ERROR | CIFS_NEG_OP, &rsp_iov);
da502f7d
PS		 1220 cifs_small_buf_release(sess_data->iov[0].iov_base);
1221 memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
3baf1a7b
SP		 1222
1223 return rc;
1224}
1225
1226static int
1227SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
1228{
1229 int rc = 0;
1230 struct cifs_ses *ses = sess_data->ses;
1231
1232 mutex_lock(&ses->server->srv_mutex);
cabfb368 1233 if (ses->server->ops->generate_signingkey) {
3baf1a7b 1234 rc = ses->server->ops->generate_signingkey(ses);
3baf1a7b
SP		 1235 if (rc) {
1236 cifs_dbg(FYI,
1237 "SMB3 session key generation failed\n");
1238 mutex_unlock(&ses->server->srv_mutex);
cabfb368 1239 return rc;
3baf1a7b
SP		 1240 }
1241 }
1242 if (!ses->server->session_estab) {
1243 ses->server->sequence_number = 0x2;
1244 ses->server->session_estab = true;
1245 }
1246 mutex_unlock(&ses->server->srv_mutex);
1247
1248 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
1249 spin_lock(&GlobalMid_Lock);
1250 ses->status = CifsGood;
1251 ses->need_reconnect = false;
1252 spin_unlock(&GlobalMid_Lock);
3baf1a7b
SP		 1253 return rc;
1254}
1255
1256#ifdef CONFIG_CIFS_UPCALL
1257static void
1258SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1259{
1260 int rc;
1261 struct cifs_ses *ses = sess_data->ses;
1262 struct cifs_spnego_msg *msg;
1263 struct key *spnego_key = NULL;
1264 struct smb2_sess_setup_rsp *rsp = NULL;
1265
1266 rc = SMB2_sess_alloc_buffer(sess_data);
1267 if (rc)
1268 goto out;
1269
1270 spnego_key = cifs_get_spnego_key(ses);
1271 if (IS_ERR(spnego_key)) {
1272 rc = PTR_ERR(spnego_key);
1273 spnego_key = NULL;
1274 goto out;
1275 }
1276
1277 msg = spnego_key->payload.data[0];
1278 /*
1279 * check version field to make sure that cifs.upcall is
1280 * sending us a response in an expected form
1281 */
1282 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
1283 cifs_dbg(VFS,
1284 "bad cifs.upcall version. Expected %d got %d",
1285 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
1286 rc = -EKEYREJECTED;
1287 goto out_put_spnego_key;
1288 }
1289
1290 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
1291 GFP_KERNEL);
1292 if (!ses->auth_key.response) {
1293 cifs_dbg(VFS,
1294 "Kerberos can't allocate (%u bytes) memory",
1295 msg->sesskey_len);
1296 rc = -ENOMEM;
1297 goto out_put_spnego_key;
1298 }
1299 ses->auth_key.len = msg->sesskey_len;
1300
1301 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
1302 sess_data->iov[1].iov_len = msg->secblob_len;
1303
1304 rc = SMB2_sess_sendreceive(sess_data);
1305 if (rc)
1306 goto out_put_spnego_key;
1307
1308 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
49f466bd 1309 ses->Suid = rsp->sync_hdr.SessionId;
3baf1a7b
SP		 1310
1311 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
3baf1a7b
SP		 1312
1313 rc = SMB2_sess_establish_session(sess_data);
1314out_put_spnego_key:
1315 key_invalidate(spnego_key);
1316 key_put(spnego_key);
1317out:
1318 sess_data->result = rc;
1319 sess_data->func = NULL;
1320 SMB2_sess_free_buffer(sess_data);
1321}
1322#else
1323static void
1324SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1325{
1326 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
1327 sess_data->result = -EOPNOTSUPP;
1328 sess_data->func = NULL;
1329}
1330#endif
1331
166cea4d
SP		 1332static void
1333SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
1334
1335static void
1336SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
5478f9ba 1337{
166cea4d
SP		 1338 int rc;
1339 struct cifs_ses *ses = sess_data->ses;
5478f9ba 1340 struct smb2_sess_setup_rsp *rsp = NULL;
166cea4d 1341 char *ntlmssp_blob = NULL;
5478f9ba 1342 bool use_spnego = false; /* else use raw ntlmssp */
166cea4d 1343 u16 blob_length = 0;
d4e63bd6 1344
5478f9ba
PS		 1345 /*
1346 * If memory allocation is successful, caller of this function
1347 * frees it.
1348 */
1349 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
166cea4d
SP		 1350 if (!ses->ntlmssp) {
1351 rc = -ENOMEM;
1352 goto out_err;
1353 }
5c234aa5 1354 ses->ntlmssp->sesskey_per_smbsess = true;
5478f9ba 1355
166cea4d 1356 rc = SMB2_sess_alloc_buffer(sess_data);
5478f9ba 1357 if (rc)
166cea4d 1358 goto out_err;
5478f9ba 1359
166cea4d
SP		 1360 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
1361 GFP_KERNEL);
1362 if (ntlmssp_blob == NULL) {
1363 rc = -ENOMEM;
1364 goto out;
1365 }
c2afb814 1366
166cea4d
SP		 1367 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
1368 if (use_spnego) {
1369 /* BB eventually need to add this */
1370 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1371 rc = -EOPNOTSUPP;
1372 goto out;
1373 } else {
1374 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
1375 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
1376 }
1377 sess_data->iov[1].iov_base = ntlmssp_blob;
1378 sess_data->iov[1].iov_len = blob_length;
c2afb814 1379
166cea4d
SP		 1380 rc = SMB2_sess_sendreceive(sess_data);
1381 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
5478f9ba 1382
166cea4d
SP		 1383 /* If true, rc here is expected and not an error */
1384 if (sess_data->buf0_type != CIFS_NO_BUFFER &&
49f466bd 1385 rsp->sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
166cea4d 1386 rc = 0;
38d77c50 1387
166cea4d
SP		 1388 if (rc)
1389 goto out;
5478f9ba 1390
1fc6ad2f 1391 if (offsetof(struct smb2_sess_setup_rsp, Buffer) !=
166cea4d
SP		 1392 le16_to_cpu(rsp->SecurityBufferOffset)) {
1393 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
1394 le16_to_cpu(rsp->SecurityBufferOffset));
5478f9ba 1395 rc = -EIO;
166cea4d 1396 goto out;
5478f9ba 1397 }
166cea4d
SP		 1398 rc = decode_ntlmssp_challenge(rsp->Buffer,
1399 le16_to_cpu(rsp->SecurityBufferLength), ses);
1400 if (rc)
1401 goto out;
5478f9ba 1402
166cea4d 1403 cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
5478f9ba 1404
5478f9ba 1405
49f466bd 1406 ses->Suid = rsp->sync_hdr.SessionId;
166cea4d 1407 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
166cea4d
SP		 1408
1409out:
1410 kfree(ntlmssp_blob);
1411 SMB2_sess_free_buffer(sess_data);
1412 if (!rc) {
1413 sess_data->result = 0;
1414 sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
1415 return;
1416 }
1417out_err:
1418 kfree(ses->ntlmssp);
1419 ses->ntlmssp = NULL;
1420 sess_data->result = rc;
1421 sess_data->func = NULL;
1422}
5478f9ba 1423
166cea4d
SP		 1424static void
1425SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
1426{
1427 int rc;
1428 struct cifs_ses *ses = sess_data->ses;
1429 struct smb2_sess_setup_req *req;
1430 struct smb2_sess_setup_rsp *rsp = NULL;
1431 unsigned char *ntlmssp_blob = NULL;
1432 bool use_spnego = false; /* else use raw ntlmssp */
1433 u16 blob_length = 0;
5478f9ba 1434
166cea4d
SP		 1435 rc = SMB2_sess_alloc_buffer(sess_data);
1436 if (rc)
1437 goto out;
5478f9ba 1438
166cea4d 1439 req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
88ea5cb7 1440 req->sync_hdr.SessionId = ses->Suid;
166cea4d
SP		 1441
1442 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
1443 sess_data->nls_cp);
1444 if (rc) {
1445 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
1446 goto out;
5478f9ba
PS		 1447 }
1448
166cea4d
SP		 1449 if (use_spnego) {
1450 /* BB eventually need to add this */
1451 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1452 rc = -EOPNOTSUPP;
1453 goto out;
1454 }
1455 sess_data->iov[1].iov_base = ntlmssp_blob;
1456 sess_data->iov[1].iov_len = blob_length;
5478f9ba 1457
166cea4d
SP		 1458 rc = SMB2_sess_sendreceive(sess_data);
1459 if (rc)
1460 goto out;
1461
1462 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1463
49f466bd 1464 ses->Suid = rsp->sync_hdr.SessionId;
5478f9ba 1465 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
5478f9ba 1466
166cea4d
SP		 1467 rc = SMB2_sess_establish_session(sess_data);
1468out:
1469 kfree(ntlmssp_blob);
1470 SMB2_sess_free_buffer(sess_data);
1471 kfree(ses->ntlmssp);
1472 ses->ntlmssp = NULL;
1473 sess_data->result = rc;
1474 sess_data->func = NULL;
1475}
d4e63bd6 1476
166cea4d
SP		 1477static int
1478SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data)
1479{
ef65aaed
SP		 1480 int type;
1481
1482 type = smb2_select_sectype(ses->server, ses->sectype);
1483 cifs_dbg(FYI, "sess setup type %d\n", type);
1484 if (type == Unspecified) {
1485 cifs_dbg(VFS,
1486 "Unable to select appropriate authentication method!");
1487 return -EINVAL;
1488 }
d4e63bd6 1489
ef65aaed 1490 switch (type) {
166cea4d
SP		 1491 case Kerberos:
1492 sess_data->func = SMB2_auth_kerberos;
1493 break;
1494 case RawNTLMSSP:
1495 sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
1496 break;
1497 default:
ef65aaed 1498 cifs_dbg(VFS, "secType %d not supported!\n", type);
166cea4d 1499 return -EOPNOTSUPP;
d4e63bd6
SP		 1500 }
1501
166cea4d
SP		 1502 return 0;
1503}
1504
1505int
1506SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
1507 const struct nls_table *nls_cp)
1508{
1509 int rc = 0;
1510 struct TCP_Server_Info *server = ses->server;
1511 struct SMB2_sess_data *sess_data;
1512
1513 cifs_dbg(FYI, "Session Setup\n");
1514
1515 if (!server) {
1516 WARN(1, "%s: server is NULL!\n", __func__);
1517 return -EIO;
d4e63bd6 1518 }
d4e63bd6 1519
166cea4d
SP		 1520 sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
1521 if (!sess_data)
1522 return -ENOMEM;
1523
1524 rc = SMB2_select_sec(ses, sess_data);
1525 if (rc)
1526 goto out;
1527 sess_data->xid = xid;
1528 sess_data->ses = ses;
1529 sess_data->buf0_type = CIFS_NO_BUFFER;
1530 sess_data->nls_cp = (struct nls_table *) nls_cp;
b2adf22f 1531 sess_data->previous_session = ses->Suid;
166cea4d 1532
8bd68c6e
AA		 1533 /*
1534 * Initialize the session hash with the server one.
1535 */
1536 memcpy(ses->preauth_sha_hash, ses->server->preauth_sha_hash,
1537 SMB2_PREAUTH_HASH_SIZE);
8bd68c6e 1538
166cea4d
SP		 1539 while (sess_data->func)
1540 sess_data->func(sess_data);
1541
c721c389
SF		 1542 if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign))
1543 cifs_dbg(VFS, "signing requested but authenticated as guest\n");
3baf1a7b 1544 rc = sess_data->result;
166cea4d 1545out:
3baf1a7b 1546 kfree(sess_data);
5478f9ba
PS		 1547 return rc;
1548}
1549
1550int
1551SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
1552{
40eff45b 1553 struct smb_rqst rqst;
5478f9ba
PS		 1554 struct smb2_logoff_req *req; /* response is also trivial struct */
1555 int rc = 0;
1556 struct TCP_Server_Info *server;
7fb8986e 1557 int flags = 0;
45305eda
RS		 1558 unsigned int total_len;
1559 struct kvec iov[1];
1560 struct kvec rsp_iov;
1561 int resp_buf_type;
5478f9ba 1562
f96637be 1563 cifs_dbg(FYI, "disconnect session %p\n", ses);
5478f9ba
PS		 1564
1565 if (ses && (ses->server))
1566 server = ses->server;
1567 else
1568 return -EIO;
1569
eb4c7df6
SP		 1570 /* no need to send SMB logoff if uid already closed due to reconnect */
1571 if (ses->need_reconnect)
1572 goto smb2_session_already_dead;
1573
45305eda 1574 rc = smb2_plain_req_init(SMB2_LOGOFF, NULL, (void **) &req, &total_len);
5478f9ba
PS		 1575 if (rc)
1576 return rc;
1577
1578 /* since no tcon, smb2_init can not do this, so do here */
45305eda 1579 req->sync_hdr.SessionId = ses->Suid;
7fb8986e
PS		 1580
1581 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
1582 flags |= CIFS_TRANSFORM_REQ;
1583 else if (server->sign)
45305eda
RS		 1584 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1585
392e1c5d 1586 flags |= CIFS_NO_RSP_BUF;
45305eda
RS		 1587
1588 iov[0].iov_base = (char *)req;
1589 iov[0].iov_len = total_len;
5478f9ba 1590
40eff45b
RS		 1591 memset(&rqst, 0, sizeof(struct smb_rqst));
1592 rqst.rq_iov = iov;
1593 rqst.rq_nvec = 1;
1594
1595 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
da502f7d 1596 cifs_small_buf_release(req);
5478f9ba
PS		 1597 /*
1598 * No tcon so can't do
1599 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1600 */
eb4c7df6
SP		 1601
1602smb2_session_already_dead:
5478f9ba
PS		 1603 return rc;
1604}
faaf946a
PS		 1605
1606static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
1607{
d60622eb 1608 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
faaf946a
PS		 1609}
1610
1611#define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1612
de9f68df
SF		 1613/* These are similar values to what Windows uses */
1614static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
1615{
1616 tcon->max_chunks = 256;
1617 tcon->max_bytes_chunk = 1048576;
1618 tcon->max_bytes_copy = 16777216;
1619}
1620
faaf946a
PS		 1621int
1622SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
1623 struct cifs_tcon *tcon, const struct nls_table *cp)
1624{
40eff45b 1625 struct smb_rqst rqst;
faaf946a
PS		 1626 struct smb2_tree_connect_req *req;
1627 struct smb2_tree_connect_rsp *rsp = NULL;
1628 struct kvec iov[2];
db3b5474 1629 struct kvec rsp_iov = { NULL, 0 };
faaf946a
PS		 1630 int rc = 0;
1631 int resp_buftype;
1632 int unc_path_len;
faaf946a 1633 __le16 *unc_path = NULL;
7fb8986e 1634 int flags = 0;
661bb943 1635 unsigned int total_len;
faaf946a 1636
f96637be 1637 cifs_dbg(FYI, "TCON\n");
faaf946a 1638
68a6afa7 1639 if (!(ses->server) || !tree)
faaf946a
PS		 1640 return -EIO;
1641
faaf946a
PS		 1642 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
1643 if (unc_path == NULL)
1644 return -ENOMEM;
1645
1646 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
1647 unc_path_len *= 2;
1648 if (unc_path_len < 2) {
1649 kfree(unc_path);
1650 return -EINVAL;
1651 }
1652
806a28ef 1653 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
b327a717 1654 tcon->tid = 0;
fae8044c 1655 atomic_set(&tcon->num_remote_opens, 0);
661bb943
RS		 1656 rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, (void **) &req,
1657 &total_len);
faaf946a
PS		 1658 if (rc) {
1659 kfree(unc_path);
1660 return rc;
1661 }
1662
5a77e75f 1663 if (smb3_encryption_required(tcon))
ae6f8dd4 1664 flags |= CIFS_TRANSFORM_REQ;
faaf946a
PS		 1665
1666 iov[0].iov_base = (char *)req;
661bb943
RS		 1667 /* 1 for pad */
1668 iov[0].iov_len = total_len - 1;
faaf946a
PS		 1669
1670 /* Testing shows that buffer offset must be at location of Buffer[0] */
1671 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
661bb943 1672 - 1 /* pad */);
faaf946a
PS		 1673 req->PathLength = cpu_to_le16(unc_path_len - 2);
1674 iov[1].iov_base = unc_path;
1675 iov[1].iov_len = unc_path_len;
1676
e71ab2aa
RS		 1677 /*
1678 * 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1
1679 * unless it is guest or anonymous user. See MS-SMB2 3.2.5.3.1
8c11a607 1680 * (Samba servers don't always set the flag so also check if null user)
e71ab2aa 1681 */
6188f28b 1682 if ((ses->server->dialect == SMB311_PROT_ID) &&
e71ab2aa 1683 !smb3_encryption_required(tcon) &&
8c11a607
SF		 1684 !(ses->session_flags &
1685 (SMB2_SESSION_FLAG_IS_GUEST|SMB2_SESSION_FLAG_IS_NULL)) &&
1686 ((ses->user_name != NULL) || (ses->sectype == Kerberos)))
6188f28b
SF		 1687 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1688
40eff45b
RS		 1689 memset(&rqst, 0, sizeof(struct smb_rqst));
1690 rqst.rq_iov = iov;
1691 rqst.rq_nvec = 2;
1692
4fe75c4e
SF		 1693 /* Need 64 for max size write so ask for more in case not there yet */
1694 req->sync_hdr.CreditRequest = cpu_to_le16(64);
1695
40eff45b 1696 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1697 cifs_small_buf_release(req);
1698 rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
f8af49dd 1699 trace_smb3_tcon(xid, tcon->tid, ses->Suid, tree, rc);
faaf946a
PS		 1700 if (rc != 0) {
1701 if (tcon) {
1702 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
1703 tcon->need_reconnect = true;
1704 }
1705 goto tcon_error_exit;
1706 }
1707
cd123007
CJ		 1708 switch (rsp->ShareType) {
1709 case SMB2_SHARE_TYPE_DISK:
f96637be 1710 cifs_dbg(FYI, "connection to disk share\n");
cd123007
CJ		 1711 break;
1712 case SMB2_SHARE_TYPE_PIPE:
b327a717 1713 tcon->pipe = true;
f96637be 1714 cifs_dbg(FYI, "connection to pipe share\n");
cd123007
CJ		 1715 break;
1716 case SMB2_SHARE_TYPE_PRINT:
b327a717 1717 tcon->print = true;
f96637be 1718 cifs_dbg(FYI, "connection to printer\n");
cd123007
CJ		 1719 break;
1720 default:
f96637be 1721 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
faaf946a
PS		 1722 rc = -EOPNOTSUPP;
1723 goto tcon_error_exit;
1724 }
1725
1726 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
769ee6a4 1727 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
faaf946a
PS		 1728 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1729 tcon->tidStatus = CifsGood;
1730 tcon->need_reconnect = false;
49f466bd 1731 tcon->tid = rsp->sync_hdr.TreeId;
46b51d08 1732 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
faaf946a
PS		 1733
1734 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1735 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
f96637be 1736 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
ae6f8dd4
PS		 1737
1738 if (tcon->seal &&
1739 !(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
1740 cifs_dbg(VFS, "Encryption is requested but not supported\n");
1741
de9f68df 1742 init_copy_chunk_defaults(tcon);
ff1c038a
SF		 1743 if (tcon->ses->server->ops->validate_negotiate)
1744 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
faaf946a 1745tcon_exit:
f8af49dd 1746
faaf946a
PS		 1747 free_rsp_buf(resp_buftype, rsp);
1748 kfree(unc_path);
1749 return rc;
1750
1751tcon_error_exit:
49f466bd 1752 if (rsp && rsp->sync_hdr.Status == STATUS_BAD_NETWORK_NAME) {
f96637be 1753 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
faaf946a
PS		 1754 }
1755 goto tcon_exit;
1756}
1757
1758int
1759SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1760{
40eff45b 1761 struct smb_rqst rqst;
faaf946a
PS		 1762 struct smb2_tree_disconnect_req *req; /* response is trivial */
1763 int rc = 0;
faaf946a 1764 struct cifs_ses *ses = tcon->ses;
7fb8986e 1765 int flags = 0;
4eecf4cf
RS		 1766 unsigned int total_len;
1767 struct kvec iov[1];
1768 struct kvec rsp_iov;
1769 int resp_buf_type;
faaf946a 1770
f96637be 1771 cifs_dbg(FYI, "Tree Disconnect\n");
faaf946a 1772
68a6afa7 1773 if (!ses || !(ses->server))
faaf946a
PS		 1774 return -EIO;
1775
1776 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1777 return 0;
1778
4eecf4cf
RS		 1779 rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req,
1780 &total_len);
faaf946a
PS		 1781 if (rc)
1782 return rc;
1783
5a77e75f 1784 if (smb3_encryption_required(tcon))
7fb8986e
PS		 1785 flags |= CIFS_TRANSFORM_REQ;
1786
392e1c5d 1787 flags |= CIFS_NO_RSP_BUF;
4eecf4cf
RS		 1788
1789 iov[0].iov_base = (char *)req;
1790 iov[0].iov_len = total_len;
1791
40eff45b
RS		 1792 memset(&rqst, 0, sizeof(struct smb_rqst));
1793 rqst.rq_iov = iov;
1794 rqst.rq_nvec = 1;
1795
1796 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
da502f7d 1797 cifs_small_buf_release(req);
faaf946a
PS		 1798 if (rc)
1799 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1800
1801 return rc;
1802}
2503a0db 1803
b8c32dbb 1804
63eb3def
PS		 1805static struct create_durable *
1806create_durable_buf(void)
1807{
1808 struct create_durable *buf;
1809
1810 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1811 if (!buf)
1812 return NULL;
1813
1814 buf->ccontext.DataOffset = cpu_to_le16(offsetof
9cbc0b73 1815 (struct create_durable, Data));
63eb3def
PS		 1816 buf->ccontext.DataLength = cpu_to_le32(16);
1817 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1818 (struct create_durable, Name));
1819 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 1820 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
63eb3def
PS		 1821 buf->Name[0] = 'D';
1822 buf->Name[1] = 'H';
1823 buf->Name[2] = 'n';
1824 buf->Name[3] = 'Q';
1825 return buf;
1826}
1827
9cbc0b73
PS		 1828static struct create_durable *
1829create_reconnect_durable_buf(struct cifs_fid *fid)
1830{
1831 struct create_durable *buf;
1832
1833 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1834 if (!buf)
1835 return NULL;
1836
1837 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1838 (struct create_durable, Data));
1839 buf->ccontext.DataLength = cpu_to_le32(16);
1840 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1841 (struct create_durable, Name));
1842 buf->ccontext.NameLength = cpu_to_le16(4);
1843 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1844 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
12197a7f 1845 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
9cbc0b73
PS		 1846 buf->Name[0] = 'D';
1847 buf->Name[1] = 'H';
1848 buf->Name[2] = 'n';
1849 buf->Name[3] = 'C';
1850 return buf;
1851}
1852
b0f6df73
RS		 1853__u8
1854smb2_parse_lease_state(struct TCP_Server_Info *server,
1855 struct smb2_create_rsp *rsp,
1856 unsigned int *epoch, char *lease_key)
b8c32dbb
PS		 1857{
1858 char *data_offset;
b5c7cde3 1859 struct create_context *cc;
deb7deff
JM		 1860 unsigned int next;
1861 unsigned int remaining;
fd554396 1862 char *name;
b8c32dbb 1863
1fc6ad2f 1864 data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset);
deb7deff 1865 remaining = le32_to_cpu(rsp->CreateContextsLength);
b5c7cde3 1866 cc = (struct create_context *)data_offset;
deb7deff 1867 while (remaining >= sizeof(struct create_context)) {
b5c7cde3 1868 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
deb7deff
JM		 1869 if (le16_to_cpu(cc->NameLength) == 4 &&
1870 strncmp(name, "RqLs", 4) == 0)
96164ab2
RS		 1871 return server->ops->parse_lease_buf(cc, epoch,
1872 lease_key);
deb7deff
JM		 1873
1874 next = le32_to_cpu(cc->Next);
1875 if (!next)
1876 break;
1877 remaining -= next;
1878 cc = (struct create_context *)((char *)cc + next);
1879 }
b8c32dbb 1880
b5c7cde3 1881 return 0;
b8c32dbb
PS		 1882}
1883
d22cbfec 1884static int
a41a28bd 1885add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
729c0c9d 1886 unsigned int *num_iovec, u8 *lease_key, __u8 *oplock)
d22cbfec
PS		 1887{
1888 struct smb2_create_req *req = iov[0].iov_base;
1889 unsigned int num = *num_iovec;
1890
729c0c9d 1891 iov[num].iov_base = server->ops->create_lease_buf(lease_key, *oplock);
d22cbfec
PS		 1892 if (iov[num].iov_base == NULL)
1893 return -ENOMEM;
a41a28bd 1894 iov[num].iov_len = server->vals->create_lease_size;
d22cbfec
PS		 1895 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1896 if (!req->CreateContextsOffset)
1897 req->CreateContextsOffset = cpu_to_le32(
4f33bc35 1898 sizeof(struct smb2_create_req) +
d22cbfec 1899 iov[num - 1].iov_len);
a41a28bd
PS		 1900 le32_add_cpu(&req->CreateContextsLength,
1901 server->vals->create_lease_size);
d22cbfec
PS		 1902 *num_iovec = num + 1;
1903 return 0;
1904}
1905
b56eae4d 1906static struct create_durable_v2 *
ca567eb2 1907create_durable_v2_buf(struct cifs_open_parms *oparms)
b56eae4d 1908{
ca567eb2 1909 struct cifs_fid *pfid = oparms->fid;
b56eae4d
SF		 1910 struct create_durable_v2 *buf;
1911
1912 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
1913 if (!buf)
1914 return NULL;
1915
1916 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1917 (struct create_durable_v2, dcontext));
1918 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
1919 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1920 (struct create_durable_v2, Name));
1921 buf->ccontext.NameLength = cpu_to_le16(4);
1922
ca567eb2
SF		 1923 /*
1924 * NB: Handle timeout defaults to 0, which allows server to choose
1925 * (most servers default to 120 seconds) and most clients default to 0.
1926 * This can be overridden at mount ("handletimeout=") if the user wants
1927 * a different persistent (or resilient) handle timeout for all opens
1928 * opens on a particular SMB3 mount.
1929 */
1930 buf->dcontext.Timeout = cpu_to_le32(oparms->tcon->handle_timeout);
b56eae4d 1931 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
fa70b87c 1932 generate_random_uuid(buf->dcontext.CreateGuid);
b56eae4d
SF		 1933 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
1934
1935 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1936 buf->Name[0] = 'D';
1937 buf->Name[1] = 'H';
1938 buf->Name[2] = '2';
1939 buf->Name[3] = 'Q';
1940 return buf;
1941}
1942
1943static struct create_durable_handle_reconnect_v2 *
1944create_reconnect_durable_v2_buf(struct cifs_fid *fid)
1945{
1946 struct create_durable_handle_reconnect_v2 *buf;
1947
1948 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
1949 GFP_KERNEL);
1950 if (!buf)
1951 return NULL;
1952
1953 buf->ccontext.DataOffset =
1954 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1955 dcontext));
1956 buf->ccontext.DataLength =
1957 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
1958 buf->ccontext.NameOffset =
1959 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1960 Name));
1961 buf->ccontext.NameLength = cpu_to_le16(4);
1962
1963 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
1964 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
1965 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1966 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
1967
1968 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1969 buf->Name[0] = 'D';
1970 buf->Name[1] = 'H';
1971 buf->Name[2] = '2';
1972 buf->Name[3] = 'C';
1973 return buf;
1974}
1975
63eb3def 1976static int
b56eae4d
SF		 1977add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
1978 struct cifs_open_parms *oparms)
1979{
1980 struct smb2_create_req *req = iov[0].iov_base;
1981 unsigned int num = *num_iovec;
1982
ca567eb2 1983 iov[num].iov_base = create_durable_v2_buf(oparms);
b56eae4d
SF		 1984 if (iov[num].iov_base == NULL)
1985 return -ENOMEM;
1986 iov[num].iov_len = sizeof(struct create_durable_v2);
1987 if (!req->CreateContextsOffset)
1988 req->CreateContextsOffset =
4f33bc35 1989 cpu_to_le32(sizeof(struct smb2_create_req) +
b56eae4d
SF		 1990 iov[1].iov_len);
1991 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
b56eae4d
SF		 1992 *num_iovec = num + 1;
1993 return 0;
1994}
1995
1996static int
1997add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
9cbc0b73 1998 struct cifs_open_parms *oparms)
63eb3def
PS		 1999{
2000 struct smb2_create_req *req = iov[0].iov_base;
2001 unsigned int num = *num_iovec;
2002
b56eae4d
SF		 2003 /* indicate that we don't need to relock the file */
2004 oparms->reconnect = false;
2005
2006 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
2007 if (iov[num].iov_base == NULL)
2008 return -ENOMEM;
2009 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
2010 if (!req->CreateContextsOffset)
2011 req->CreateContextsOffset =
4f33bc35 2012 cpu_to_le32(sizeof(struct smb2_create_req) +
b56eae4d
SF		 2013 iov[1].iov_len);
2014 le32_add_cpu(&req->CreateContextsLength,
2015 sizeof(struct create_durable_handle_reconnect_v2));
b56eae4d
SF		 2016 *num_iovec = num + 1;
2017 return 0;
2018}
2019
2020static int
2021add_durable_context(struct kvec *iov, unsigned int *num_iovec,
2022 struct cifs_open_parms *oparms, bool use_persistent)
2023{
2024 struct smb2_create_req *req = iov[0].iov_base;
2025 unsigned int num = *num_iovec;
2026
2027 if (use_persistent) {
2028 if (oparms->reconnect)
2029 return add_durable_reconnect_v2_context(iov, num_iovec,
2030 oparms);
2031 else
2032 return add_durable_v2_context(iov, num_iovec, oparms);
2033 }
2034
9cbc0b73
PS		 2035 if (oparms->reconnect) {
2036 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
2037 /* indicate that we don't need to relock the file */
2038 oparms->reconnect = false;
2039 } else
2040 iov[num].iov_base = create_durable_buf();
63eb3def
PS		 2041 if (iov[num].iov_base == NULL)
2042 return -ENOMEM;
2043 iov[num].iov_len = sizeof(struct create_durable);
2044 if (!req->CreateContextsOffset)
2045 req->CreateContextsOffset =
4f33bc35 2046 cpu_to_le32(sizeof(struct smb2_create_req) +
63eb3def 2047 iov[1].iov_len);
31f92e9a 2048 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
63eb3def
PS		 2049 *num_iovec = num + 1;
2050 return 0;
2051}
2052
cdeaf9d0
SF		 2053/* See MS-SMB2 2.2.13.2.7 */
2054static struct crt_twarp_ctxt *
2055create_twarp_buf(__u64 timewarp)
2056{
2057 struct crt_twarp_ctxt *buf;
2058
2059 buf = kzalloc(sizeof(struct crt_twarp_ctxt), GFP_KERNEL);
2060 if (!buf)
2061 return NULL;
2062
2063 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2064 (struct crt_twarp_ctxt, Timestamp));
2065 buf->ccontext.DataLength = cpu_to_le32(8);
2066 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2067 (struct crt_twarp_ctxt, Name));
2068 buf->ccontext.NameLength = cpu_to_le16(4);
2069 /* SMB2_CREATE_TIMEWARP_TOKEN is "TWrp" */
2070 buf->Name[0] = 'T';
2071 buf->Name[1] = 'W';
2072 buf->Name[2] = 'r';
2073 buf->Name[3] = 'p';
2074 buf->Timestamp = cpu_to_le64(timewarp);
2075 return buf;
2076}
2077
2078/* See MS-SMB2 2.2.13.2.7 */
2079static int
2080add_twarp_context(struct kvec *iov, unsigned int *num_iovec, __u64 timewarp)
2081{
2082 struct smb2_create_req *req = iov[0].iov_base;
2083 unsigned int num = *num_iovec;
2084
2085 iov[num].iov_base = create_twarp_buf(timewarp);
2086 if (iov[num].iov_base == NULL)
2087 return -ENOMEM;
2088 iov[num].iov_len = sizeof(struct crt_twarp_ctxt);
2089 if (!req->CreateContextsOffset)
2090 req->CreateContextsOffset = cpu_to_le32(
2091 sizeof(struct smb2_create_req) +
2092 iov[num - 1].iov_len);
2093 le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_twarp_ctxt));
2094 *num_iovec = num + 1;
2095 return 0;
2096}
2097
f0712928
AA		 2098static int
2099alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
2100 const char *treename, const __le16 *path)
2101{
2102 int treename_len, path_len;
2103 struct nls_table *cp;
2104 const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
2105
2106 /*
2107 * skip leading "\\"
2108 */
2109 treename_len = strlen(treename);
2110 if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\'))
2111 return -EINVAL;
2112
2113 treename += 2;
2114 treename_len -= 2;
2115
2116 path_len = UniStrnlen((wchar_t *)path, PATH_MAX);
2117
2118 /*
2119 * make room for one path separator between the treename and
2120 * path
2121 */
2122 *out_len = treename_len + 1 + path_len;
2123
2124 /*
2125 * final path needs to be null-terminated UTF16 with a
2126 * size aligned to 8
2127 */
2128
2129 *out_size = roundup((*out_len+1)*2, 8);
2130 *out_path = kzalloc(*out_size, GFP_KERNEL);
2131 if (!*out_path)
2132 return -ENOMEM;
2133
2134 cp = load_nls_default();
2135 cifs_strtoUTF16(*out_path, treename, treename_len, cp);
2136 UniStrcat(*out_path, sep);
2137 UniStrcat(*out_path, path);
2138 unload_nls(cp);
2139
2140 return 0;
2141}
2142
bea851b8
SF		 2143int smb311_posix_mkdir(const unsigned int xid, struct inode *inode,
2144 umode_t mode, struct cifs_tcon *tcon,
2145 const char *full_path,
2146 struct cifs_sb_info *cifs_sb)
2147{
2148 struct smb_rqst rqst;
2149 struct smb2_create_req *req;
256b4c3f 2150 struct smb2_create_rsp *rsp = NULL;
bea851b8
SF		 2151 struct cifs_ses *ses = tcon->ses;
2152 struct kvec iov[3]; /* make sure at least one for each open context */
2153 struct kvec rsp_iov = {NULL, 0};
2154 int resp_buftype;
2155 int uni_path_len;
2156 __le16 *copy_path = NULL;
2157 int copy_size;
2158 int rc = 0;
2159 unsigned int n_iov = 2;
2160 __u32 file_attributes = 0;
2161 char *pc_buf = NULL;
2162 int flags = 0;
2163 unsigned int total_len;
256b4c3f 2164 __le16 *utf16_path = NULL;
bea851b8
SF		 2165
2166 cifs_dbg(FYI, "mkdir\n");
2167
256b4c3f
AA		 2168 /* resource #1: path allocation */
2169 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2170 if (!utf16_path)
2171 return -ENOMEM;
2172
29cbfa1b 2173 if (!ses || !(ses->server)) {
256b4c3f
AA		 2174 rc = -EIO;
2175 goto err_free_path;
2176 }
bea851b8 2177
256b4c3f 2178 /* resource #2: request */
bea851b8 2179 rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
bea851b8 2180 if (rc)
256b4c3f
AA		 2181 goto err_free_path;
2182
bea851b8
SF		 2183
2184 if (smb3_encryption_required(tcon))
2185 flags |= CIFS_TRANSFORM_REQ;
2186
bea851b8
SF		 2187 req->ImpersonationLevel = IL_IMPERSONATION;
2188 req->DesiredAccess = cpu_to_le32(FILE_WRITE_ATTRIBUTES);
2189 /* File attributes ignored on open (used in create though) */
2190 req->FileAttributes = cpu_to_le32(file_attributes);
2191 req->ShareAccess = FILE_SHARE_ALL_LE;
2192 req->CreateDisposition = cpu_to_le32(FILE_CREATE);
2193 req->CreateOptions = cpu_to_le32(CREATE_NOT_FILE);
2194
2195 iov[0].iov_base = (char *)req;
2196 /* -1 since last byte is buf[0] which is sent below (path) */
2197 iov[0].iov_len = total_len - 1;
2198
2199 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
2200
2201 /* [MS-SMB2] 2.2.13 NameOffset:
2202 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2203 * the SMB2 header, the file name includes a prefix that will
2204 * be processed during DFS name normalization as specified in
2205 * section 3.3.5.9. Otherwise, the file name is relative to
2206 * the share that is identified by the TreeId in the SMB2
2207 * header.
2208 */
2209 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
2210 int name_len;
2211
2212 req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
2213 rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
2214 &name_len,
256b4c3f
AA		 2215 tcon->treeName, utf16_path);
2216 if (rc)
2217 goto err_free_req;
2218
bea851b8
SF		 2219 req->NameLength = cpu_to_le16(name_len * 2);
2220 uni_path_len = copy_size;
256b4c3f
AA		 2221 /* free before overwriting resource */
2222 kfree(utf16_path);
2223 utf16_path = copy_path;
bea851b8 2224 } else {
256b4c3f 2225 uni_path_len = (2 * UniStrnlen((wchar_t *)utf16_path, PATH_MAX)) + 2;
bea851b8
SF		 2226 /* MUST set path len (NameLength) to 0 opening root of share */
2227 req->NameLength = cpu_to_le16(uni_path_len - 2);
2228 if (uni_path_len % 8 != 0) {
2229 copy_size = roundup(uni_path_len, 8);
2230 copy_path = kzalloc(copy_size, GFP_KERNEL);
2231 if (!copy_path) {
256b4c3f
AA		 2232 rc = -ENOMEM;
2233 goto err_free_req;
bea851b8 2234 }
256b4c3f 2235 memcpy((char *)copy_path, (const char *)utf16_path,
bea851b8
SF		 2236 uni_path_len);
2237 uni_path_len = copy_size;
256b4c3f
AA		 2238 /* free before overwriting resource */
2239 kfree(utf16_path);
2240 utf16_path = copy_path;
bea851b8
SF		 2241 }
2242 }
2243
2244 iov[1].iov_len = uni_path_len;
256b4c3f 2245 iov[1].iov_base = utf16_path;
bea851b8
SF		 2246 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2247
2248 if (tcon->posix_extensions) {
256b4c3f 2249 /* resource #3: posix buf */
bea851b8 2250 rc = add_posix_context(iov, &n_iov, mode);
256b4c3f
AA		 2251 if (rc)
2252 goto err_free_req;
bea851b8
SF		 2253 pc_buf = iov[n_iov-1].iov_base;
2254 }
2255
2256
2257 memset(&rqst, 0, sizeof(struct smb_rqst));
2258 rqst.rq_iov = iov;
2259 rqst.rq_nvec = n_iov;
2260
efe2e9f3
SF		 2261 trace_smb3_posix_mkdir_enter(xid, tcon->tid, ses->Suid, CREATE_NOT_FILE,
2262 FILE_WRITE_ATTRIBUTES);
256b4c3f
AA		 2263 /* resource #4: response buffer */
2264 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
2265 if (rc) {
bea851b8
SF		 2266 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
2267 trace_smb3_posix_mkdir_err(xid, tcon->tid, ses->Suid,
256b4c3f
AA		 2268 CREATE_NOT_FILE,
2269 FILE_WRITE_ATTRIBUTES, rc);
2270 goto err_free_rsp_buf;
2271 }
2272
2273 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2274 trace_smb3_posix_mkdir_done(xid, rsp->PersistentFileId, tcon->tid,
2275 ses->Suid, CREATE_NOT_FILE,
2276 FILE_WRITE_ATTRIBUTES);
bea851b8
SF		 2277
2278 SMB2_close(xid, tcon, rsp->PersistentFileId, rsp->VolatileFileId);
2279
2280 /* Eventually save off posix specific response info and timestaps */
2281
256b4c3f 2282err_free_rsp_buf:
bea851b8 2283 free_rsp_buf(resp_buftype, rsp);
256b4c3f
AA		 2284 kfree(pc_buf);
2285err_free_req:
2286 cifs_small_buf_release(req);
2287err_free_path:
2288 kfree(utf16_path);
bea851b8 2289 return rc;
bea851b8 2290}
bea851b8 2291
2503a0db 2292int
1eb9fb52
RS		 2293SMB2_open_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, __u8 *oplock,
2294 struct cifs_open_parms *oparms, __le16 *path)
2503a0db 2295{
1eb9fb52 2296 struct TCP_Server_Info *server = tcon->ses->server;
2503a0db 2297 struct smb2_create_req *req;
da502f7d 2298 unsigned int n_iov = 2;
ca81983f 2299 __u32 file_attributes = 0;
1eb9fb52
RS		 2300 int copy_size;
2301 int uni_path_len;
4f33bc35 2302 unsigned int total_len;
1eb9fb52
RS		 2303 struct kvec *iov = rqst->rq_iov;
2304 __le16 *copy_path;
2305 int rc;
2503a0db 2306
4f33bc35 2307 rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
2503a0db
PS		 2308 if (rc)
2309 return rc;
2310
1eb9fb52
RS		 2311 iov[0].iov_base = (char *)req;
2312 /* -1 since last byte is buf[0] which is sent below (path) */
2313 iov[0].iov_len = total_len - 1;
7fb8986e 2314
064f6047 2315 if (oparms->create_options & CREATE_OPTION_READONLY)
ca81983f 2316 file_attributes |= ATTR_READONLY;
db8b631d
SF		 2317 if (oparms->create_options & CREATE_OPTION_SPECIAL)
2318 file_attributes |= ATTR_SYSTEM;
ca81983f 2319
2503a0db 2320 req->ImpersonationLevel = IL_IMPERSONATION;
064f6047 2321 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
2503a0db
PS		 2322 /* File attributes ignored on open (used in create though) */
2323 req->FileAttributes = cpu_to_le32(file_attributes);
2324 req->ShareAccess = FILE_SHARE_ALL_LE;
064f6047
PS		 2325 req->CreateDisposition = cpu_to_le32(oparms->disposition);
2326 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
4f33bc35 2327 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
f0712928
AA		 2328
2329 /* [MS-SMB2] 2.2.13 NameOffset:
2330 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2331 * the SMB2 header, the file name includes a prefix that will
2332 * be processed during DFS name normalization as specified in
2333 * section 3.3.5.9. Otherwise, the file name is relative to
2334 * the share that is identified by the TreeId in the SMB2
2335 * header.
2336 */
2337 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
2338 int name_len;
2339
4f33bc35 2340 req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
f0712928
AA		 2341 rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
2342 &name_len,
2343 tcon->treeName, path);
1eb9fb52 2344 if (rc)
f0712928
AA		 2345 return rc;
2346 req->NameLength = cpu_to_le16(name_len * 2);
59aa3718
PS		 2347 uni_path_len = copy_size;
2348 path = copy_path;
f0712928
AA		 2349 } else {
2350 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
2351 /* MUST set path len (NameLength) to 0 opening root of share */
2352 req->NameLength = cpu_to_le16(uni_path_len - 2);
1eb9fb52
RS		 2353 copy_size = uni_path_len;
2354 if (copy_size % 8 != 0)
2355 copy_size = roundup(copy_size, 8);
2356 copy_path = kzalloc(copy_size, GFP_KERNEL);
2357 if (!copy_path)
2358 return -ENOMEM;
2359 memcpy((char *)copy_path, (const char *)path,
2360 uni_path_len);
2361 uni_path_len = copy_size;
2362 path = copy_path;
2503a0db
PS		 2363 }
2364
59aa3718
PS		 2365 iov[1].iov_len = uni_path_len;
2366 iov[1].iov_base = path;
59aa3718 2367
b8c32dbb
PS		 2368 if (!server->oplocks)
2369 *oplock = SMB2_OPLOCK_LEVEL_NONE;
2370
a41a28bd 2371 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
b8c32dbb
PS		 2372 *oplock == SMB2_OPLOCK_LEVEL_NONE)
2373 req->RequestedOplockLevel = *oplock;
f8015683
SF		 2374 else if (!(server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING) &&
2375 (oparms->create_options & CREATE_NOT_FILE))
2376 req->RequestedOplockLevel = *oplock; /* no srv lease support */
b8c32dbb 2377 else {
729c0c9d
SB		 2378 rc = add_lease_context(server, iov, &n_iov,
2379 oparms->fid->lease_key, oplock);
1eb9fb52 2380 if (rc)
d22cbfec 2381 return rc;
b8c32dbb
PS		 2382 }
2383
63eb3def
PS		 2384 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
2385 /* need to set Next field of lease context if we request it */
a41a28bd 2386 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
63eb3def 2387 struct create_context *ccontext =
da502f7d 2388 (struct create_context *)iov[n_iov-1].iov_base;
1c46943f 2389 ccontext->Next =
a41a28bd 2390 cpu_to_le32(server->vals->create_lease_size);
63eb3def 2391 }
b56eae4d 2392
da502f7d 2393 rc = add_durable_context(iov, &n_iov, oparms,
b56eae4d 2394 tcon->use_persistent);
1eb9fb52 2395 if (rc)
63eb3def 2396 return rc;
63eb3def
PS		 2397 }
2398
ce558b0e
SF		 2399 if (tcon->posix_extensions) {
2400 if (n_iov > 2) {
2401 struct create_context *ccontext =
2402 (struct create_context *)iov[n_iov-1].iov_base;
2403 ccontext->Next =
2404 cpu_to_le32(iov[n_iov-1].iov_len);
2405 }
2406
2407 rc = add_posix_context(iov, &n_iov, oparms->mode);
1eb9fb52 2408 if (rc)
ce558b0e 2409 return rc;
ce558b0e 2410 }
ce558b0e 2411
cdeaf9d0
SF		 2412 if (tcon->snapshot_time) {
2413 cifs_dbg(FYI, "adding snapshot context\n");
2414 if (n_iov > 2) {
2415 struct create_context *ccontext =
2416 (struct create_context *)iov[n_iov-1].iov_base;
2417 ccontext->Next =
2418 cpu_to_le32(iov[n_iov-1].iov_len);
2419 }
2420
2421 rc = add_twarp_context(iov, &n_iov, tcon->snapshot_time);
2422 if (rc)
2423 return rc;
2424 }
2425
2426
1eb9fb52
RS		 2427 rqst->rq_nvec = n_iov;
2428 return 0;
2429}
2430
2431/* rq_iov[0] is the request and is released by cifs_small_buf_release().
2432 * All other vectors are freed by kfree().
2433 */
2434void
2435SMB2_open_free(struct smb_rqst *rqst)
2436{
2437 int i;
2438
32a1fb36
RS		 2439 if (rqst && rqst->rq_iov) {
2440 cifs_small_buf_release(rqst->rq_iov[0].iov_base);
2441 for (i = 1; i < rqst->rq_nvec; i++)
2442 if (rqst->rq_iov[i].iov_base != smb2_padding)
2443 kfree(rqst->rq_iov[i].iov_base);
2444 }
1eb9fb52
RS		 2445}
2446
2447int
2448SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
2449 __u8 *oplock, struct smb2_file_all_info *buf,
2450 struct kvec *err_iov, int *buftype)
2451{
2452 struct smb_rqst rqst;
2453 struct smb2_create_rsp *rsp = NULL;
2454 struct TCP_Server_Info *server;
2455 struct cifs_tcon *tcon = oparms->tcon;
2456 struct cifs_ses *ses = tcon->ses;
4d8dfafc 2457 struct kvec iov[SMB2_CREATE_IOV_SIZE];
1eb9fb52 2458 struct kvec rsp_iov = {NULL, 0};
ef2298a0 2459 int resp_buftype = CIFS_NO_BUFFER;
1eb9fb52
RS		 2460 int rc = 0;
2461 int flags = 0;
2462
2463 cifs_dbg(FYI, "create/open\n");
2464 if (ses && (ses->server))
2465 server = ses->server;
2466 else
2467 return -EIO;
2468
2469 if (smb3_encryption_required(tcon))
2470 flags |= CIFS_TRANSFORM_REQ;
2471
40eff45b 2472 memset(&rqst, 0, sizeof(struct smb_rqst));
1eb9fb52 2473 memset(&iov, 0, sizeof(iov));
40eff45b 2474 rqst.rq_iov = iov;
4d8dfafc 2475 rqst.rq_nvec = SMB2_CREATE_IOV_SIZE;
1eb9fb52
RS		 2476
2477 rc = SMB2_open_init(tcon, &rqst, oplock, oparms, path);
2478 if (rc)
2479 goto creat_exit;
40eff45b 2480
efe2e9f3
SF		 2481 trace_smb3_open_enter(xid, tcon->tid, tcon->ses->Suid,
2482 oparms->create_options, oparms->desired_access);
2483
40eff45b 2484 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
4f33bc35 2485 &rsp_iov);
da502f7d 2486 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2503a0db
PS		 2487
2488 if (rc != 0) {
2489 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
91cb74f5
RS		 2490 if (err_iov && rsp) {
2491 *err_iov = rsp_iov;
9d874c36 2492 *buftype = resp_buftype;
91cb74f5
RS		 2493 resp_buftype = CIFS_NO_BUFFER;
2494 rsp = NULL;
2495 }
28d59363
SF		 2496 trace_smb3_open_err(xid, tcon->tid, ses->Suid,
2497 oparms->create_options, oparms->desired_access, rc);
2503a0db 2498 goto creat_exit;
28d59363
SF		 2499 } else
2500 trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid,
2501 ses->Suid, oparms->create_options,
2502 oparms->desired_access);
2503a0db 2503
fae8044c 2504 atomic_inc(&tcon->num_remote_opens);
064f6047
PS		 2505 oparms->fid->persistent_fid = rsp->PersistentFileId;
2506 oparms->fid->volatile_fid = rsp->VolatileFileId;
dfe33f9a
SF		 2507#ifdef CONFIG_CIFS_DEBUG2
2508 oparms->fid->mid = le64_to_cpu(rsp->sync_hdr.MessageId);
2509#endif /* CIFS_DEBUG2 */
f0df737e
PS		 2510
2511 if (buf) {
2512 memcpy(buf, &rsp->CreationTime, 32);
2513 buf->AllocationSize = rsp->AllocationSize;
2514 buf->EndOfFile = rsp->EndofFile;
2515 buf->Attributes = rsp->FileAttributes;
2516 buf->NumberOfLinks = cpu_to_le32(1);
2517 buf->DeletePending = 0;
2518 }
2e44b288 2519
b8c32dbb 2520 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
b0f6df73
RS		 2521 *oplock = smb2_parse_lease_state(server, rsp,
2522 &oparms->fid->epoch,
2523 oparms->fid->lease_key);
b8c32dbb
PS		 2524 else
2525 *oplock = rsp->OplockLevel;
2503a0db 2526creat_exit:
1eb9fb52 2527 SMB2_open_free(&rqst);
2503a0db
PS		 2528 free_rsp_buf(resp_buftype, rsp);
2529 return rc;
2530}
2531
4a72dafa 2532int
ccdc77a3
RS		 2533SMB2_ioctl_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
2534 u64 persistent_fid, u64 volatile_fid, u32 opcode,
153322f7
SF		 2535 bool is_fsctl, char *in_data, u32 indatalen,
2536 __u32 max_response_size)
4a72dafa
SF		 2537{
2538 struct smb2_ioctl_req *req;
ccdc77a3 2539 struct kvec *iov = rqst->rq_iov;
97754680 2540 unsigned int total_len;
ccdc77a3 2541 int rc;
2c87d6a9 2542 char *in_data_buf;
4a72dafa 2543
97754680 2544 rc = smb2_plain_req_init(SMB2_IOCTL, tcon, (void **) &req, &total_len);
4a72dafa
SF		 2545 if (rc)
2546 return rc;
2547
2c87d6a9
LL		 2548 if (indatalen) {
2549 /*
2550 * indatalen is usually small at a couple of bytes max, so
2551 * just allocate through generic pool
2552 */
2553 in_data_buf = kmalloc(indatalen, GFP_NOFS);
2554 if (!in_data_buf) {
2555 cifs_small_buf_release(req);
2556 return -ENOMEM;
2557 }
2558 memcpy(in_data_buf, in_data, indatalen);
2559 }
2560
4a72dafa
SF		 2561 req->CtlCode = cpu_to_le32(opcode);
2562 req->PersistentFileId = persistent_fid;
2563 req->VolatileFileId = volatile_fid;
2564
ccdc77a3
RS		 2565 iov[0].iov_base = (char *)req;
2566 /*
2567 * If no input data, the size of ioctl struct in
2568 * protocol spec still includes a 1 byte data buffer,
2569 * but if input data passed to ioctl, we do not
2570 * want to double count this, so we do not send
2571 * the dummy one byte of data in iovec[0] if sending
2572 * input data (in iovec[1]).
2573 */
4a72dafa
SF		 2574 if (indatalen) {
2575 req->InputCount = cpu_to_le32(indatalen);
2576 /* do not set InputOffset if no input data */
2577 req->InputOffset =
97754680 2578 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer));
ccdc77a3
RS		 2579 rqst->rq_nvec = 2;
2580 iov[0].iov_len = total_len - 1;
2c87d6a9 2581 iov[1].iov_base = in_data_buf;
4a72dafa 2582 iov[1].iov_len = indatalen;
ccdc77a3
RS		 2583 } else {
2584 rqst->rq_nvec = 1;
2585 iov[0].iov_len = total_len;
2586 }
4a72dafa
SF		 2587
2588 req->OutputOffset = 0;
2589 req->OutputCount = 0; /* MBZ */
2590
2591 /*
153322f7
SF		 2592 * In most cases max_response_size is set to 16K (CIFSMaxBufSize)
2593 * We Could increase default MaxOutputResponse, but that could require
2594 * more credits. Windows typically sets this smaller, but for some
4a72dafa
SF		 2595 * ioctls it may be useful to allow server to send more. No point
2596 * limiting what the server can send as long as fits in one credit
153322f7
SF		 2597 * We can not handle more than CIFS_MAX_BUF_SIZE yet but may want
2598 * to increase this limit up in the future.
2599 * Note that for snapshot queries that servers like Azure expect that
2600 * the first query be minimal size (and just used to get the number/size
2601 * of previous versions) so response size must be specified as EXACTLY
2602 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2603 * of eight bytes. Currently that is the only case where we set max
2604 * response size smaller.
4a72dafa 2605 */
153322f7 2606 req->MaxOutputResponse = cpu_to_le32(max_response_size);
4a72dafa
SF		 2607
2608 if (is_fsctl)
2609 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
2610 else
2611 req->Flags = 0;
2612
4587eee0
SF		 2613 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
2614 if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO)
97754680 2615 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
4a72dafa 2616
ccdc77a3
RS		 2617 return 0;
2618}
2619
2620void
2621SMB2_ioctl_free(struct smb_rqst *rqst)
2622{
6457c20e 2623 int i;
2c87d6a9 2624 if (rqst && rqst->rq_iov) {
ccdc77a3 2625 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
6457c20e
MZ		 2626 for (i = 1; i < rqst->rq_nvec; i++)
2627 if (rqst->rq_iov[i].iov_base != smb2_padding)
2628 kfree(rqst->rq_iov[i].iov_base);
2c87d6a9 2629 }
ccdc77a3
RS		 2630}
2631
153322f7 2632
ccdc77a3
RS		 2633/*
2634 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
2635 */
2636int
2637SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2638 u64 volatile_fid, u32 opcode, bool is_fsctl,
153322f7 2639 char *in_data, u32 indatalen, u32 max_out_data_len,
ccdc77a3
RS		 2640 char **out_data, u32 *plen /* returned data len */)
2641{
2642 struct smb_rqst rqst;
2643 struct smb2_ioctl_rsp *rsp = NULL;
2644 struct cifs_ses *ses;
72c419d9 2645 struct kvec iov[SMB2_IOCTL_IOV_SIZE];
ccdc77a3
RS		 2646 struct kvec rsp_iov = {NULL, 0};
2647 int resp_buftype = CIFS_NO_BUFFER;
2648 int rc = 0;
2649 int flags = 0;
2650
2651 cifs_dbg(FYI, "SMB2 IOCTL\n");
2652
2653 if (out_data != NULL)
2654 *out_data = NULL;
2655
2656 /* zero out returned data len, in case of error */
2657 if (plen)
2658 *plen = 0;
2659
2660 if (tcon)
2661 ses = tcon->ses;
2662 else
2663 return -EIO;
2664
2665 if (!ses || !(ses->server))
2666 return -EIO;
2667
2668 if (smb3_encryption_required(tcon))
2669 flags |= CIFS_TRANSFORM_REQ;
2670
40eff45b 2671 memset(&rqst, 0, sizeof(struct smb_rqst));
ccdc77a3 2672 memset(&iov, 0, sizeof(iov));
40eff45b 2673 rqst.rq_iov = iov;
72c419d9 2674 rqst.rq_nvec = SMB2_IOCTL_IOV_SIZE;
ccdc77a3 2675
153322f7
SF		 2676 rc = SMB2_ioctl_init(tcon, &rqst, persistent_fid, volatile_fid, opcode,
2677 is_fsctl, in_data, indatalen, max_out_data_len);
ccdc77a3
RS		 2678 if (rc)
2679 goto ioctl_exit;
40eff45b
RS		 2680
2681 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
97754680 2682 &rsp_iov);
da502f7d 2683 rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
4a72dafa 2684
eccb4422
SF		 2685 if (rc != 0)
2686 trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid,
2687 ses->Suid, 0, opcode, rc);
2688
2f3ebaba 2689 if ((rc != 0) && (rc != -EINVAL) && (rc != -E2BIG)) {
8e353106 2690 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
4a72dafa 2691 goto ioctl_exit;
9bf0c9cd
SF		 2692 } else if (rc == -EINVAL) {
2693 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
2694 (opcode != FSCTL_SRV_COPYCHUNK)) {
8e353106 2695 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
9bf0c9cd
SF		 2696 goto ioctl_exit;
2697 }
2f3ebaba
RS		 2698 } else if (rc == -E2BIG) {
2699 if (opcode != FSCTL_QUERY_ALLOCATED_RANGES) {
2700 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
2701 goto ioctl_exit;
2702 }
4a72dafa
SF		 2703 }
2704
2705 /* check if caller wants to look at return data or just return rc */
2706 if ((plen == NULL) || (out_data == NULL))
2707 goto ioctl_exit;
2708
2709 *plen = le32_to_cpu(rsp->OutputCount);
2710
2711 /* We check for obvious errors in the output buffer length and offset */
2712 if (*plen == 0)
2713 goto ioctl_exit; /* server returned no data */
2d204ee9 2714 else if (*plen > rsp_iov.iov_len || *plen > 0xFF00) {
4a72dafa
SF		 2715 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
2716 *plen = 0;
2717 rc = -EIO;
2718 goto ioctl_exit;
2719 }
2720
2d204ee9 2721 if (rsp_iov.iov_len - *plen < le32_to_cpu(rsp->OutputOffset)) {
4a72dafa
SF		 2722 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
2723 le32_to_cpu(rsp->OutputOffset));
2724 *plen = 0;
2725 rc = -EIO;
2726 goto ioctl_exit;
2727 }
2728
d034feeb
Y		 2729 *out_data = kmemdup((char *)rsp + le32_to_cpu(rsp->OutputOffset),
2730 *plen, GFP_KERNEL);
4a72dafa
SF		 2731 if (*out_data == NULL) {
2732 rc = -ENOMEM;
2733 goto ioctl_exit;
2734 }
2735
4a72dafa 2736ioctl_exit:
ccdc77a3 2737 SMB2_ioctl_free(&rqst);
4a72dafa
SF		 2738 free_rsp_buf(resp_buftype, rsp);
2739 return rc;
2740}
2741
64a5cfa6
SF		 2742/*
2743 * Individual callers to ioctl worker function follow
2744 */
2745
2746int
2747SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2748 u64 persistent_fid, u64 volatile_fid)
2749{
2750 int rc;
64a5cfa6
SF		 2751 struct compress_ioctl fsctl_input;
2752 char *ret_data = NULL;
2753
2754 fsctl_input.CompressionState =
bc09d141 2755 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
64a5cfa6
SF		 2756
2757 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
2758 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
2759 (char *)&fsctl_input /* data input */,
153322f7
SF		 2760 2 /* in data len */, CIFSMaxBufSize /* max out data */,
2761 &ret_data /* out data */, NULL);
64a5cfa6
SF		 2762
2763 cifs_dbg(FYI, "set compression rc %d\n", rc);
64a5cfa6
SF		 2764
2765 return rc;
2766}
2767
8eb4ecfa
RS		 2768int
2769SMB2_close_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
2770 u64 persistent_fid, u64 volatile_fid)
2771{
2772 struct smb2_close_req *req;
2773 struct kvec *iov = rqst->rq_iov;
2774 unsigned int total_len;
2775 int rc;
2776
2777 rc = smb2_plain_req_init(SMB2_CLOSE, tcon, (void **) &req, &total_len);
2778 if (rc)
2779 return rc;
2780
2781 req->PersistentFileId = persistent_fid;
2782 req->VolatileFileId = volatile_fid;
2783 iov[0].iov_base = (char *)req;
2784 iov[0].iov_len = total_len;
2785
2786 return 0;
2787}
2788
2789void
2790SMB2_close_free(struct smb_rqst *rqst)
2791{
32a1fb36
RS		 2792 if (rqst && rqst->rq_iov)
2793 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
8eb4ecfa
RS		 2794}
2795
2503a0db 2796int
97ca1762
RS		 2797SMB2_close_flags(const unsigned int xid, struct cifs_tcon *tcon,
2798 u64 persistent_fid, u64 volatile_fid, int flags)
2503a0db 2799{
40eff45b 2800 struct smb_rqst rqst;
8eb4ecfa 2801 struct smb2_close_rsp *rsp = NULL;
2503a0db
PS		 2802 struct cifs_ses *ses = tcon->ses;
2803 struct kvec iov[1];
da502f7d 2804 struct kvec rsp_iov;
ef2298a0 2805 int resp_buftype = CIFS_NO_BUFFER;
2503a0db
PS		 2806 int rc = 0;
2807
f96637be 2808 cifs_dbg(FYI, "Close\n");
2503a0db 2809
68a6afa7 2810 if (!ses || !(ses->server))
2503a0db
PS		 2811 return -EIO;
2812
5a77e75f 2813 if (smb3_encryption_required(tcon))
7fb8986e
PS		 2814 flags |= CIFS_TRANSFORM_REQ;
2815
40eff45b 2816 memset(&rqst, 0, sizeof(struct smb_rqst));
8eb4ecfa 2817 memset(&iov, 0, sizeof(iov));
40eff45b
RS		 2818 rqst.rq_iov = iov;
2819 rqst.rq_nvec = 1;
2820
8eb4ecfa
RS		 2821 rc = SMB2_close_init(tcon, &rqst, persistent_fid, volatile_fid);
2822 if (rc)
2823 goto close_exit;
2824
40eff45b 2825 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 2826 rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
2503a0db
PS		 2827
2828 if (rc != 0) {
d4a029d2 2829 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
eccb4422
SF		 2830 trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid,
2831 rc);
2503a0db
PS		 2832 goto close_exit;
2833 }
2834
fae8044c
SF		 2835 atomic_dec(&tcon->num_remote_opens);
2836
2503a0db
PS		 2837 /* BB FIXME - decode close response, update inode for caching */
2838
2839close_exit:
8eb4ecfa 2840 SMB2_close_free(&rqst);
2503a0db
PS		 2841 free_rsp_buf(resp_buftype, rsp);
2842 return rc;
2843}
be4cb9e3 2844
97ca1762
RS		 2845int
2846SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
2847 u64 persistent_fid, u64 volatile_fid)
2848{
2849 return SMB2_close_flags(xid, tcon, persistent_fid, volatile_fid, 0);
2850}
2851
730928c8
RS		 2852int
2853smb2_validate_iov(unsigned int offset, unsigned int buffer_length,
2854 struct kvec *iov, unsigned int min_buf_size)
be4cb9e3 2855{
c1596ff5 2856 unsigned int smb_len = iov->iov_len;
1fc6ad2f
RS		 2857 char *end_of_smb = smb_len + (char *)iov->iov_base;
2858 char *begin_of_buf = offset + (char *)iov->iov_base;
be4cb9e3
PS		 2859 char *end_of_buf = begin_of_buf + buffer_length;
2860
2861
2862 if (buffer_length < min_buf_size) {
f96637be
JP		 2863 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
2864 buffer_length, min_buf_size);
be4cb9e3
PS		 2865 return -EINVAL;
2866 }
2867
2868 /* check if beyond RFC1001 maximum length */
2869 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
f96637be
JP		 2870 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
2871 buffer_length, smb_len);
be4cb9e3
PS		 2872 return -EINVAL;
2873 }
2874
2875 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
f96637be 2876 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
be4cb9e3
PS		 2877 return -EINVAL;
2878 }
2879
2880 return 0;
2881}
2882
2883/*
2884 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2885 * Caller must free buffer.
2886 */
c5a5f38f
RS		 2887int
2888smb2_validate_and_copy_iov(unsigned int offset, unsigned int buffer_length,
2889 struct kvec *iov, unsigned int minbufsize,
2890 char *data)
be4cb9e3 2891{
1fc6ad2f 2892 char *begin_of_buf = offset + (char *)iov->iov_base;
be4cb9e3
PS		 2893 int rc;
2894
2895 if (!data)
2896 return -EINVAL;
2897
730928c8 2898 rc = smb2_validate_iov(offset, buffer_length, iov, minbufsize);
be4cb9e3
PS		 2899 if (rc)
2900 return rc;
2901
2902 memcpy(data, begin_of_buf, buffer_length);
2903
2904 return 0;
2905}
2906
296ecbae
RS		 2907int
2908SMB2_query_info_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
2909 u64 persistent_fid, u64 volatile_fid,
2910 u8 info_class, u8 info_type, u32 additional_info,
f5b05d62 2911 size_t output_len, size_t input_len, void *input)
be4cb9e3
PS		 2912{
2913 struct smb2_query_info_req *req;
296ecbae 2914 struct kvec *iov = rqst->rq_iov;
b2fb7fec 2915 unsigned int total_len;
296ecbae 2916 int rc;
be4cb9e3 2917
b2fb7fec
RS		 2918 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
2919 &total_len);
be4cb9e3
PS		 2920 if (rc)
2921 return rc;
2922
42c493c1 2923 req->InfoType = info_type;
f0df737e 2924 req->FileInfoClass = info_class;
be4cb9e3
PS		 2925 req->PersistentFileId = persistent_fid;
2926 req->VolatileFileId = volatile_fid;
42c493c1 2927 req->AdditionalInformation = cpu_to_le32(additional_info);
48923d2a 2928
f0df737e 2929 req->OutputBufferLength = cpu_to_le32(output_len);
f5b05d62
RS		 2930 if (input_len) {
2931 req->InputBufferLength = cpu_to_le32(input_len);
2932 /* total_len for smb query request never close to le16 max */
2933 req->InputBufferOffset = cpu_to_le16(total_len - 1);
2934 memcpy(req->Buffer, input, input_len);
2935 }
be4cb9e3
PS		 2936
2937 iov[0].iov_base = (char *)req;
b2fb7fec 2938 /* 1 for Buffer */
f5b05d62 2939 iov[0].iov_len = total_len - 1 + input_len;
296ecbae
RS		 2940 return 0;
2941}
2942
2943void
2944SMB2_query_info_free(struct smb_rqst *rqst)
2945{
32a1fb36
RS		 2946 if (rqst && rqst->rq_iov)
2947 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
296ecbae
RS		 2948}
2949
2950static int
2951query_info(const unsigned int xid, struct cifs_tcon *tcon,
2952 u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
2953 u32 additional_info, size_t output_len, size_t min_len, void **data,
2954 u32 *dlen)
2955{
2956 struct smb_rqst rqst;
2957 struct smb2_query_info_rsp *rsp = NULL;
2958 struct kvec iov[1];
2959 struct kvec rsp_iov;
2960 int rc = 0;
ef2298a0 2961 int resp_buftype = CIFS_NO_BUFFER;
296ecbae
RS		 2962 struct cifs_ses *ses = tcon->ses;
2963 int flags = 0;
73aaf920 2964 bool allocated = false;
296ecbae
RS		 2965
2966 cifs_dbg(FYI, "Query Info\n");
2967
2968 if (!ses || !(ses->server))
2969 return -EIO;
2970
2971 if (smb3_encryption_required(tcon))
2972 flags |= CIFS_TRANSFORM_REQ;
be4cb9e3 2973
40eff45b 2974 memset(&rqst, 0, sizeof(struct smb_rqst));
296ecbae 2975 memset(&iov, 0, sizeof(iov));
40eff45b
RS		 2976 rqst.rq_iov = iov;
2977 rqst.rq_nvec = 1;
2978
296ecbae
RS		 2979 rc = SMB2_query_info_init(tcon, &rqst, persistent_fid, volatile_fid,
2980 info_class, info_type, additional_info,
f5b05d62 2981 output_len, 0, NULL);
296ecbae
RS		 2982 if (rc)
2983 goto qinf_exit;
2984
d42043a6
SF		 2985 trace_smb3_query_info_enter(xid, persistent_fid, tcon->tid,
2986 ses->Suid, info_class, (__u32)info_type);
2987
40eff45b 2988 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 2989 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
e5d04887 2990
be4cb9e3
PS		 2991 if (rc) {
2992 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
eccb4422
SF		 2993 trace_smb3_query_info_err(xid, persistent_fid, tcon->tid,
2994 ses->Suid, info_class, (__u32)info_type, rc);
be4cb9e3
PS		 2995 goto qinf_exit;
2996 }
2997
d42043a6
SF		 2998 trace_smb3_query_info_done(xid, persistent_fid, tcon->tid,
2999 ses->Suid, info_class, (__u32)info_type);
3000
42c493c1
SP		 3001 if (dlen) {
3002 *dlen = le32_to_cpu(rsp->OutputBufferLength);
3003 if (!*data) {
3004 *data = kmalloc(*dlen, GFP_KERNEL);
3005 if (!*data) {
3006 cifs_dbg(VFS,
3007 "Error %d allocating memory for acl\n",
3008 rc);
3009 *dlen = 0;
73aaf920 3010 rc = -ENOMEM;
42c493c1
SP		 3011 goto qinf_exit;
3012 }
73aaf920 3013 allocated = true;
42c493c1
SP		 3014 }
3015 }
3016
c5a5f38f
RS		 3017 rc = smb2_validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset),
3018 le32_to_cpu(rsp->OutputBufferLength),
3019 &rsp_iov, min_len, *data);
73aaf920
CIK		 3020 if (rc && allocated) {
3021 kfree(*data);
3022 *data = NULL;
3023 *dlen = 0;
3024 }
be4cb9e3
PS		 3025
3026qinf_exit:
296ecbae 3027 SMB2_query_info_free(&rqst);
be4cb9e3
PS		 3028 free_rsp_buf(resp_buftype, rsp);
3029 return rc;
3030}
9094fad1 3031
42c493c1
SP		 3032int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
3033 u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data)
3034{
3035 return query_info(xid, tcon, persistent_fid, volatile_fid,
3036 FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0,
3037 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
3038 sizeof(struct smb2_file_all_info), (void **)&data,
3039 NULL);
3040}
3041
f0df737e 3042int
42c493c1 3043SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
f0df737e 3044 u64 persistent_fid, u64 volatile_fid,
42c493c1 3045 void **data, u32 *plen)
f0df737e 3046{
42c493c1
SP		 3047 __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO;
3048 *plen = 0;
3049
f0df737e 3050 return query_info(xid, tcon, persistent_fid, volatile_fid,
42c493c1 3051 0, SMB2_O_INFO_SECURITY, additional_info,
ee25c6dd 3052 SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen);
f0df737e
PS		 3053}
3054
3055int
3056SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
3057 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
3058{
3059 return query_info(xid, tcon, persistent_fid, volatile_fid,
42c493c1
SP		 3060 FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0,
3061 sizeof(struct smb2_file_internal_info),
f0df737e 3062 sizeof(struct smb2_file_internal_info),
42c493c1 3063 (void **)&uniqueid, NULL);
f0df737e
PS		 3064}
3065
9094fad1
PS		 3066/*
3067 * This is a no-op for now. We're not really interested in the reply, but
3068 * rather in the fact that the server sent one and that server->lstrp
3069 * gets updated.
3070 *
3071 * FIXME: maybe we should consider checking that the reply matches request?
3072 */
3073static void
3074smb2_echo_callback(struct mid_q_entry *mid)
3075{
3076 struct TCP_Server_Info *server = mid->callback_data;
31473fc4 3077 struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
34f4deb7 3078 struct cifs_credits credits = { .value = 0, .instance = 0 };
9094fad1 3079
0fd1d37b 3080 if (mid->mid_state == MID_RESPONSE_RECEIVED
34f4deb7
PS		 3081 || mid->mid_state == MID_RESPONSE_MALFORMED) {
3082 credits.value = le16_to_cpu(rsp->sync_hdr.CreditRequest);
3083 credits.instance = server->reconnect_instance;
3084 }
9094fad1
PS		 3085
3086 DeleteMidQEntry(mid);
34f4deb7 3087 add_credits(server, &credits, CIFS_ECHO_OP);
9094fad1
PS		 3088}
3089
53e0e11e
PS		 3090void smb2_reconnect_server(struct work_struct *work)
3091{
3092 struct TCP_Server_Info *server = container_of(work,
3093 struct TCP_Server_Info, reconnect.work);
3094 struct cifs_ses *ses;
3095 struct cifs_tcon *tcon, *tcon2;
3096 struct list_head tmp_list;
3097 int tcon_exist = false;
18ea4311
GP		 3098 int rc;
3099 int resched = false;
3100
53e0e11e
PS		 3101
3102 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
3103 mutex_lock(&server->reconnect_mutex);
3104
3105 INIT_LIST_HEAD(&tmp_list);
3106 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
3107
3108 spin_lock(&cifs_tcp_ses_lock);
3109 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
3110 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
96a988ff 3111 if (tcon->need_reconnect || tcon->need_reopen_files) {
53e0e11e
PS		 3112 tcon->tc_count++;
3113 list_add_tail(&tcon->rlist, &tmp_list);
3114 tcon_exist = true;
3115 }
3116 }
0ff2b018
RS		 3117 /*
3118 * IPC has the same lifetime as its session and uses its
3119 * refcount.
3120 */
b327a717
AA		 3121 if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) {
3122 list_add_tail(&ses->tcon_ipc->rlist, &tmp_list);
3123 tcon_exist = true;
0ff2b018 3124 ses->ses_count++;
b327a717 3125 }
53e0e11e
PS		 3126 }
3127 /*
3128 * Get the reference to server struct to be sure that the last call of
3129 * cifs_put_tcon() in the loop below won't release the server pointer.
3130 */
3131 if (tcon_exist)
3132 server->srv_count++;
3133
3134 spin_unlock(&cifs_tcp_ses_lock);
3135
3136 list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
18ea4311
GP		 3137 rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon);
3138 if (!rc)
96a988ff 3139 cifs_reopen_persistent_handles(tcon);
18ea4311
GP		 3140 else
3141 resched = true;
53e0e11e 3142 list_del_init(&tcon->rlist);
0ff2b018
RS		 3143 if (tcon->ipc)
3144 cifs_put_smb_ses(tcon->ses);
3145 else
3146 cifs_put_tcon(tcon);
53e0e11e
PS		 3147 }
3148
3149 cifs_dbg(FYI, "Reconnecting tcons finished\n");
18ea4311
GP		 3150 if (resched)
3151 queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
53e0e11e
PS		 3152 mutex_unlock(&server->reconnect_mutex);
3153
3154 /* now we can safely release srv struct */
3155 if (tcon_exist)
3156 cifs_put_tcp_session(server, 1);
3157}
3158
9094fad1
PS		 3159int
3160SMB2_echo(struct TCP_Server_Info *server)
3161{
3162 struct smb2_echo_req *req;
3163 int rc = 0;
c713c877 3164 struct kvec iov[1];
738f9de5 3165 struct smb_rqst rqst = { .rq_iov = iov,
c713c877 3166 .rq_nvec = 1 };
7f7ae759 3167 unsigned int total_len;
9094fad1 3168
f96637be 3169 cifs_dbg(FYI, "In echo request\n");
9094fad1 3170
4fcd1813 3171 if (server->tcpStatus == CifsNeedNegotiate) {
53e0e11e
PS		 3172 /* No need to send echo on newly established connections */
3173 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
3174 return rc;
4fcd1813
SF		 3175 }
3176
7f7ae759 3177 rc = smb2_plain_req_init(SMB2_ECHO, NULL, (void **)&req, &total_len);
9094fad1
PS		 3178 if (rc)
3179 return rc;
3180
7f7ae759 3181 req->sync_hdr.CreditRequest = cpu_to_le16(1);
9094fad1 3182
c713c877
RS		 3183 iov[0].iov_len = total_len;
3184 iov[0].iov_base = (char *)req;
9094fad1 3185
9b7c18a2 3186 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
3349c3a7 3187 server, CIFS_ECHO_OP, NULL);
9094fad1 3188 if (rc)
f96637be 3189 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
9094fad1
PS		 3190
3191 cifs_small_buf_release(req);
3192 return rc;
3193}
7a5cfb19
PS		 3194
3195int
3196SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
3197 u64 volatile_fid)
3198{
40eff45b 3199 struct smb_rqst rqst;
7a5cfb19 3200 struct smb2_flush_req *req;
7a5cfb19
PS		 3201 struct cifs_ses *ses = tcon->ses;
3202 struct kvec iov[1];
da502f7d 3203 struct kvec rsp_iov;
7a5cfb19
PS		 3204 int resp_buftype;
3205 int rc = 0;
7fb8986e 3206 int flags = 0;
1f444e4c 3207 unsigned int total_len;
7a5cfb19 3208
f96637be 3209 cifs_dbg(FYI, "Flush\n");
7a5cfb19 3210
68a6afa7 3211 if (!ses || !(ses->server))
7a5cfb19
PS		 3212 return -EIO;
3213
1f444e4c 3214 rc = smb2_plain_req_init(SMB2_FLUSH, tcon, (void **) &req, &total_len);
7a5cfb19
PS		 3215 if (rc)
3216 return rc;
3217
5a77e75f 3218 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3219 flags |= CIFS_TRANSFORM_REQ;
3220
7a5cfb19
PS		 3221 req->PersistentFileId = persistent_fid;
3222 req->VolatileFileId = volatile_fid;
3223
3224 iov[0].iov_base = (char *)req;
1f444e4c 3225 iov[0].iov_len = total_len;
7a5cfb19 3226
40eff45b
RS		 3227 memset(&rqst, 0, sizeof(struct smb_rqst));
3228 rqst.rq_iov = iov;
3229 rqst.rq_nvec = 1;
3230
3231 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 3232 cifs_small_buf_release(req);
7a5cfb19 3233
eccb4422 3234 if (rc != 0) {
7a5cfb19 3235 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
eccb4422
SF		 3236 trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid,
3237 rc);
3238 }
7a5cfb19 3239
da502f7d 3240 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
7a5cfb19
PS		 3241 return rc;
3242}
09a4707e
PS		 3243
3244/*
3245 * To form a chain of read requests, any read requests after the first should
3246 * have the end_of_chain boolean set to true.
3247 */
3248static int
738f9de5 3249smb2_new_read_req(void **buf, unsigned int *total_len,
2dabfd5b
LL		 3250 struct cifs_io_parms *io_parms, struct cifs_readdata *rdata,
3251 unsigned int remaining_bytes, int request_type)
09a4707e
PS		 3252{
3253 int rc = -EACCES;
b8f57ee8 3254 struct smb2_read_plain_req *req = NULL;
31473fc4 3255 struct smb2_sync_hdr *shdr;
2dabfd5b 3256 struct TCP_Server_Info *server;
09a4707e 3257
b8f57ee8
PS		 3258 rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
3259 total_len);
09a4707e
PS		 3260 if (rc)
3261 return rc;
2dabfd5b
LL		 3262
3263 server = io_parms->tcon->ses->server;
3264 if (server == NULL)
09a4707e
PS		 3265 return -ECONNABORTED;
3266
b8f57ee8 3267 shdr = &req->sync_hdr;
31473fc4 3268 shdr->ProcessId = cpu_to_le32(io_parms->pid);
09a4707e
PS		 3269
3270 req->PersistentFileId = io_parms->persistent_fid;
3271 req->VolatileFileId = io_parms->volatile_fid;
3272 req->ReadChannelInfoOffset = 0; /* reserved */
3273 req->ReadChannelInfoLength = 0; /* reserved */
3274 req->Channel = 0; /* reserved */
3275 req->MinimumCount = 0;
3276 req->Length = cpu_to_le32(io_parms->length);
3277 req->Offset = cpu_to_le64(io_parms->offset);
d323c246
SF		 3278
3279 trace_smb3_read_enter(0 /* xid */,
3280 io_parms->persistent_fid,
3281 io_parms->tcon->tid, io_parms->tcon->ses->Suid,
3282 io_parms->offset, io_parms->length);
bd3dcc6a
LL		 3283#ifdef CONFIG_CIFS_SMB_DIRECT
3284 /*
3285 * If we want to do a RDMA write, fill in and append
3286 * smbd_buffer_descriptor_v1 to the end of read request
3287 */
bb4c0419 3288 if (server->rdma && rdata && !server->sign &&
bd3dcc6a
LL		 3289 rdata->bytes >= server->smbd_conn->rdma_readwrite_threshold) {
3290
3291 struct smbd_buffer_descriptor_v1 *v1;
3292 bool need_invalidate =
3293 io_parms->tcon->ses->server->dialect == SMB30_PROT_ID;
3294
3295 rdata->mr = smbd_register_mr(
3296 server->smbd_conn, rdata->pages,
7cf20bce
LL		 3297 rdata->nr_pages, rdata->page_offset,
3298 rdata->tailsz, true, need_invalidate);
bd3dcc6a 3299 if (!rdata->mr)
b7972092 3300 return -EAGAIN;
bd3dcc6a
LL		 3301
3302 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
3303 if (need_invalidate)
3304 req->Channel = SMB2_CHANNEL_RDMA_V1;
3305 req->ReadChannelInfoOffset =
2026b06e 3306 cpu_to_le16(offsetof(struct smb2_read_plain_req, Buffer));
bd3dcc6a 3307 req->ReadChannelInfoLength =
2026b06e 3308 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
bd3dcc6a 3309 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
2026b06e
SF		 3310 v1->offset = cpu_to_le64(rdata->mr->mr->iova);
3311 v1->token = cpu_to_le32(rdata->mr->mr->rkey);
3312 v1->length = cpu_to_le32(rdata->mr->mr->length);
bd3dcc6a
LL		 3313
3314 *total_len += sizeof(*v1) - 1;
3315 }
3316#endif
09a4707e
PS		 3317 if (request_type & CHAINED_REQUEST) {
3318 if (!(request_type & END_OF_CHAIN)) {
b8f57ee8
PS		 3319 /* next 8-byte aligned request */
3320 *total_len = DIV_ROUND_UP(*total_len, 8) * 8;
3321 shdr->NextCommand = cpu_to_le32(*total_len);
09a4707e 3322 } else /* END_OF_CHAIN */
31473fc4 3323 shdr->NextCommand = 0;
09a4707e 3324 if (request_type & RELATED_REQUEST) {
31473fc4 3325 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
09a4707e
PS		 3326 /*
3327 * Related requests use info from previous read request
3328 * in chain.
3329 */
31473fc4
PS		 3330 shdr->SessionId = 0xFFFFFFFF;
3331 shdr->TreeId = 0xFFFFFFFF;
09a4707e
PS		 3332 req->PersistentFileId = 0xFFFFFFFF;
3333 req->VolatileFileId = 0xFFFFFFFF;
3334 }
3335 }
3336 if (remaining_bytes > io_parms->length)
3337 req->RemainingBytes = cpu_to_le32(remaining_bytes);
3338 else
3339 req->RemainingBytes = 0;
3340
738f9de5 3341 *buf = req;
09a4707e
PS		 3342 return rc;
3343}
3344
3345static void
3346smb2_readv_callback(struct mid_q_entry *mid)
3347{
3348 struct cifs_readdata *rdata = mid->callback_data;
3349 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
3350 struct TCP_Server_Info *server = tcon->ses->server;
738f9de5 3351 struct smb2_sync_hdr *shdr =
977b6170 3352 (struct smb2_sync_hdr *)rdata->iov[0].iov_base;
34f4deb7 3353 struct cifs_credits credits = { .value = 0, .instance = 0 };
738f9de5
PS		 3354 struct smb_rqst rqst = { .rq_iov = rdata->iov,
3355 .rq_nvec = 2,
8321fec4 3356 .rq_pages = rdata->pages,
1dbe3466 3357 .rq_offset = rdata->page_offset,
8321fec4
JL		 3358 .rq_npages = rdata->nr_pages,
3359 .rq_pagesz = rdata->pagesz,
3360 .rq_tailsz = rdata->tailsz };
09a4707e 3361
f96637be
JP		 3362 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
3363 __func__, mid->mid, mid->mid_state, rdata->result,
3364 rdata->bytes);
09a4707e
PS		 3365
3366 switch (mid->mid_state) {
3367 case MID_RESPONSE_RECEIVED:
34f4deb7
PS		 3368 credits.value = le16_to_cpu(shdr->CreditRequest);
3369 credits.instance = server->reconnect_instance;
09a4707e 3370 /* result already set, check signature */
4326ed2f 3371 if (server->sign && !mid->decrypted) {
3c1bf7e4
PS		 3372 int rc;
3373
0b688cfc 3374 rc = smb2_verify_signature(&rqst, server);
3c1bf7e4 3375 if (rc)
f96637be
JP		 3376 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
3377 rc);
3c1bf7e4 3378 }
09a4707e 3379 /* FIXME: should this be counted toward the initiating task? */
34a54d61
PS		 3380 task_io_account_read(rdata->got_bytes);
3381 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 3382 break;
3383 case MID_REQUEST_SUBMITTED:
3384 case MID_RETRY_NEEDED:
3385 rdata->result = -EAGAIN;
d913ed17
PS		 3386 if (server->sign && rdata->got_bytes)
3387 /* reset bytes number since we can not check a sign */
3388 rdata->got_bytes = 0;
3389 /* FIXME: should this be counted toward the initiating task? */
3390 task_io_account_read(rdata->got_bytes);
3391 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e 3392 break;
0fd1d37b 3393 case MID_RESPONSE_MALFORMED:
34f4deb7
PS		 3394 credits.value = le16_to_cpu(shdr->CreditRequest);
3395 credits.instance = server->reconnect_instance;
0fd1d37b 3396 /* fall through */
09a4707e 3397 default:
6b15eb18 3398 rdata->result = -EIO;
09a4707e 3399 }
bd3dcc6a
LL		 3400#ifdef CONFIG_CIFS_SMB_DIRECT
3401 /*
3402 * If this rdata has a memmory registered, the MR can be freed
3403 * MR needs to be freed as soon as I/O finishes to prevent deadlock
3404 * because they have limited number and are used for future I/Os
3405 */
3406 if (rdata->mr) {
3407 smbd_deregister_mr(rdata->mr);
3408 rdata->mr = NULL;
3409 }
3410#endif
082aaa87 3411 if (rdata->result && rdata->result != -ENODATA) {
09a4707e 3412 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
7d42e72f
PS		 3413 trace_smb3_read_err(0 /* xid */,
3414 rdata->cfile->fid.persistent_fid,
3415 tcon->tid, tcon->ses->Suid, rdata->offset,
3416 rdata->bytes, rdata->result);
3417 } else
3418 trace_smb3_read_done(0 /* xid */,
3419 rdata->cfile->fid.persistent_fid,
3420 tcon->tid, tcon->ses->Suid,
3421 rdata->offset, rdata->got_bytes);
09a4707e
PS		 3422
3423 queue_work(cifsiod_wq, &rdata->work);
3424 DeleteMidQEntry(mid);
34f4deb7 3425 add_credits(server, &credits, 0);
09a4707e
PS		 3426}
3427
738f9de5 3428/* smb2_async_readv - send an async read, and set up mid to handle result */
09a4707e
PS		 3429int
3430smb2_async_readv(struct cifs_readdata *rdata)
3431{
bed9da02 3432 int rc, flags = 0;
31473fc4
PS		 3433 char *buf;
3434 struct smb2_sync_hdr *shdr;
09a4707e 3435 struct cifs_io_parms io_parms;
738f9de5 3436 struct smb_rqst rqst = { .rq_iov = rdata->iov,
c713c877 3437 .rq_nvec = 1 };
bed9da02 3438 struct TCP_Server_Info *server;
738f9de5 3439 unsigned int total_len;
09a4707e 3440
f96637be
JP		 3441 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
3442 __func__, rdata->offset, rdata->bytes);
09a4707e
PS		 3443
3444 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
3445 io_parms.offset = rdata->offset;
3446 io_parms.length = rdata->bytes;
3447 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
3448 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
3449 io_parms.pid = rdata->pid;
bed9da02
PS		 3450
3451 server = io_parms.tcon->ses->server;
3452
2dabfd5b
LL		 3453 rc = smb2_new_read_req(
3454 (void **) &buf, &total_len, &io_parms, rdata, 0, 0);
f0b93cb9 3455 if (rc)
09a4707e
PS		 3456 return rc;
3457
5a77e75f 3458 if (smb3_encryption_required(io_parms.tcon))
7fb8986e
PS		 3459 flags |= CIFS_TRANSFORM_REQ;
3460
c713c877
RS		 3461 rdata->iov[0].iov_base = buf;
3462 rdata->iov[0].iov_len = total_len;
b8f57ee8
PS		 3463
3464 shdr = (struct smb2_sync_hdr *)buf;
09a4707e 3465
335b7b62 3466 if (rdata->credits.value > 0) {
31473fc4 3467 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
bed9da02 3468 SMB2_MAX_BUFFER_SIZE));
b983f7e9
PS		 3469 shdr->CreditRequest =
3470 cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 1);
9a1c67e8
PS		 3471
3472 rc = adjust_credits(server, &rdata->credits, rdata->bytes);
3473 if (rc)
335b7b62 3474 goto async_readv_out;
9a1c67e8 3475
7fb8986e 3476 flags |= CIFS_HAS_CREDITS;
bed9da02
PS		 3477 }
3478
09a4707e 3479 kref_get(&rdata->refcount);
fec344e3 3480 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
09a4707e 3481 cifs_readv_receive, smb2_readv_callback,
3349c3a7
PS		 3482 smb3_handle_read_data, rdata, flags,
3483 &rdata->credits);
e5d04887 3484 if (rc) {
09a4707e 3485 kref_put(&rdata->refcount, cifs_readdata_release);
e5d04887 3486 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
7d42e72f
PS		 3487 trace_smb3_read_err(0 /* xid */, io_parms.persistent_fid,
3488 io_parms.tcon->tid,
3489 io_parms.tcon->ses->Suid,
3490 io_parms.offset, io_parms.length, rc);
3491 }
09a4707e 3492
335b7b62 3493async_readv_out:
09a4707e
PS		 3494 cifs_small_buf_release(buf);
3495 return rc;
3496}
33319141 3497
d8e05039
PS		 3498int
3499SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
3500 unsigned int *nbytes, char **buf, int *buf_type)
3501{
40eff45b 3502 struct smb_rqst rqst;
d8e05039 3503 int resp_buftype, rc = -EACCES;
b8f57ee8 3504 struct smb2_read_plain_req *req = NULL;
d8e05039 3505 struct smb2_read_rsp *rsp = NULL;
f5688a6d 3506 struct kvec iov[1];
da502f7d 3507 struct kvec rsp_iov;
738f9de5 3508 unsigned int total_len;
7fb8986e
PS		 3509 int flags = CIFS_LOG_ERROR;
3510 struct cifs_ses *ses = io_parms->tcon->ses;
d8e05039
PS		 3511
3512 *nbytes = 0;
2dabfd5b 3513 rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0);
d8e05039
PS		 3514 if (rc)
3515 return rc;
3516
5a77e75f 3517 if (smb3_encryption_required(io_parms->tcon))
7fb8986e
PS		 3518 flags |= CIFS_TRANSFORM_REQ;
3519
f5688a6d
RS		 3520 iov[0].iov_base = (char *)req;
3521 iov[0].iov_len = total_len;
b8f57ee8 3522
40eff45b
RS		 3523 memset(&rqst, 0, sizeof(struct smb_rqst));
3524 rqst.rq_iov = iov;
3525 rqst.rq_nvec = 1;
3526
3527 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 3528 rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
d8e05039 3529
a821df3f
RS		 3530 if (rc) {
3531 if (rc != -ENODATA) {
3532 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
3533 cifs_dbg(VFS, "Send error in read = %d\n", rc);
7d42e72f
PS		 3534 trace_smb3_read_err(xid, req->PersistentFileId,
3535 io_parms->tcon->tid, ses->Suid,
3536 io_parms->offset, io_parms->length,
3537 rc);
b0a42f2a
SF		 3538 } else
3539 trace_smb3_read_done(xid, req->PersistentFileId,
3540 io_parms->tcon->tid, ses->Suid,
3541 io_parms->offset, 0);
da502f7d 3542 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
05fd5c2c 3543 cifs_small_buf_release(req);
a821df3f 3544 return rc == -ENODATA ? 0 : rc;
eccb4422
SF		 3545 } else
3546 trace_smb3_read_done(xid, req->PersistentFileId,
3547 io_parms->tcon->tid, ses->Suid,
3548 io_parms->offset, io_parms->length);
d8e05039 3549
088aaf17
Z		 3550 cifs_small_buf_release(req);
3551
a821df3f
RS		 3552 *nbytes = le32_to_cpu(rsp->DataLength);
3553 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
3554 (*nbytes > io_parms->length)) {
3555 cifs_dbg(FYI, "bad length %d for count %d\n",
3556 *nbytes, io_parms->length);
3557 rc = -EIO;
3558 *nbytes = 0;
d8e05039
PS		 3559 }
3560
3561 if (*buf) {
977b6170 3562 memcpy(*buf, (char *)rsp + rsp->DataOffset, *nbytes);
da502f7d 3563 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
d8e05039 3564 } else if (resp_buftype != CIFS_NO_BUFFER) {
da502f7d 3565 *buf = rsp_iov.iov_base;
d8e05039
PS		 3566 if (resp_buftype == CIFS_SMALL_BUFFER)
3567 *buf_type = CIFS_SMALL_BUFFER;
3568 else if (resp_buftype == CIFS_LARGE_BUFFER)
3569 *buf_type = CIFS_LARGE_BUFFER;
3570 }
3571 return rc;
3572}
3573
33319141
PS		 3574/*
3575 * Check the mid_state and signature on received buffer (if any), and queue the
3576 * workqueue completion task.
3577 */
3578static void
3579smb2_writev_callback(struct mid_q_entry *mid)
3580{
3581 struct cifs_writedata *wdata = mid->callback_data;
3582 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
34f4deb7 3583 struct TCP_Server_Info *server = tcon->ses->server;
33319141
PS		 3584 unsigned int written;
3585 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
34f4deb7 3586 struct cifs_credits credits = { .value = 0, .instance = 0 };
33319141
PS		 3587
3588 switch (mid->mid_state) {
3589 case MID_RESPONSE_RECEIVED:
34f4deb7
PS		 3590 credits.value = le16_to_cpu(rsp->sync_hdr.CreditRequest);
3591 credits.instance = server->reconnect_instance;
3592 wdata->result = smb2_check_receive(mid, server, 0);
33319141
PS		 3593 if (wdata->result != 0)
3594 break;
3595
3596 written = le32_to_cpu(rsp->DataLength);
3597 /*
3598 * Mask off high 16 bits when bytes written as returned
3599 * by the server is greater than bytes requested by the
3600 * client. OS/2 servers are known to set incorrect
3601 * CountHigh values.
3602 */
3603 if (written > wdata->bytes)
3604 written &= 0xFFFF;
3605
3606 if (written < wdata->bytes)
3607 wdata->result = -ENOSPC;
3608 else
3609 wdata->bytes = written;
3610 break;
3611 case MID_REQUEST_SUBMITTED:
3612 case MID_RETRY_NEEDED:
3613 wdata->result = -EAGAIN;
3614 break;
0fd1d37b 3615 case MID_RESPONSE_MALFORMED:
34f4deb7
PS		 3616 credits.value = le16_to_cpu(rsp->sync_hdr.CreditRequest);
3617 credits.instance = server->reconnect_instance;
0fd1d37b 3618 /* fall through */
33319141
PS		 3619 default:
3620 wdata->result = -EIO;
3621 break;
3622 }
db223a59
LL		 3623#ifdef CONFIG_CIFS_SMB_DIRECT
3624 /*
3625 * If this wdata has a memory registered, the MR can be freed
3626 * The number of MRs available is limited, it's important to recover
3627 * used MR as soon as I/O is finished. Hold MR longer in the later
3628 * I/O process can possibly result in I/O deadlock due to lack of MR
3629 * to send request on I/O retry
3630 */
3631 if (wdata->mr) {
3632 smbd_deregister_mr(wdata->mr);
3633 wdata->mr = NULL;
3634 }
3635#endif
7d42e72f 3636 if (wdata->result) {
33319141 3637 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
7d42e72f
PS		 3638 trace_smb3_write_err(0 /* no xid */,
3639 wdata->cfile->fid.persistent_fid,
3640 tcon->tid, tcon->ses->Suid, wdata->offset,
3641 wdata->bytes, wdata->result);
3642 } else
3643 trace_smb3_write_done(0 /* no xid */,
3644 wdata->cfile->fid.persistent_fid,
3645 tcon->tid, tcon->ses->Suid,
3646 wdata->offset, wdata->bytes);
33319141
PS		 3647
3648 queue_work(cifsiod_wq, &wdata->work);
3649 DeleteMidQEntry(mid);
34f4deb7 3650 add_credits(server, &credits, 0);
33319141
PS		 3651}
3652
3653/* smb2_async_writev - send an async write, and set up mid to handle result */
3654int
4a5c80d7
SF		 3655smb2_async_writev(struct cifs_writedata *wdata,
3656 void (*release)(struct kref *kref))
33319141 3657{
cb7e9eab 3658 int rc = -EACCES, flags = 0;
33319141 3659 struct smb2_write_req *req = NULL;
31473fc4 3660 struct smb2_sync_hdr *shdr;
33319141 3661 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
cb7e9eab 3662 struct TCP_Server_Info *server = tcon->ses->server;
c713c877 3663 struct kvec iov[1];
738f9de5 3664 struct smb_rqst rqst = { };
f5688a6d 3665 unsigned int total_len;
33319141 3666
f5688a6d 3667 rc = smb2_plain_req_init(SMB2_WRITE, tcon, (void **) &req, &total_len);
f0b93cb9
PS		 3668 if (rc)
3669 return rc;
33319141 3670
5a77e75f 3671 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3672 flags |= CIFS_TRANSFORM_REQ;
3673
f5688a6d 3674 shdr = (struct smb2_sync_hdr *)req;
31473fc4 3675 shdr->ProcessId = cpu_to_le32(wdata->cfile->pid);
33319141
PS		 3676
3677 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
3678 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
3679 req->WriteChannelInfoOffset = 0;
3680 req->WriteChannelInfoLength = 0;
3681 req->Channel = 0;
3682 req->Offset = cpu_to_le64(wdata->offset);
33319141 3683 req->DataOffset = cpu_to_le16(
f5688a6d 3684 offsetof(struct smb2_write_req, Buffer));
33319141 3685 req->RemainingBytes = 0;
d323c246
SF		 3686
3687 trace_smb3_write_enter(0 /* xid */, wdata->cfile->fid.persistent_fid,
3688 tcon->tid, tcon->ses->Suid, wdata->offset, wdata->bytes);
db223a59
LL		 3689#ifdef CONFIG_CIFS_SMB_DIRECT
3690 /*
3691 * If we want to do a server RDMA read, fill in and append
3692 * smbd_buffer_descriptor_v1 to the end of write request
3693 */
bb4c0419 3694 if (server->rdma && !server->sign && wdata->bytes >=
db223a59
LL		 3695 server->smbd_conn->rdma_readwrite_threshold) {
3696
3697 struct smbd_buffer_descriptor_v1 *v1;
3698 bool need_invalidate = server->dialect == SMB30_PROT_ID;
3699
3700 wdata->mr = smbd_register_mr(
3701 server->smbd_conn, wdata->pages,
7cf20bce
LL		 3702 wdata->nr_pages, wdata->page_offset,
3703 wdata->tailsz, false, need_invalidate);
db223a59 3704 if (!wdata->mr) {
b7972092 3705 rc = -EAGAIN;
db223a59
LL		 3706 goto async_writev_out;
3707 }
3708 req->Length = 0;
3709 req->DataOffset = 0;
7cf20bce
LL		 3710 if (wdata->nr_pages > 1)
3711 req->RemainingBytes =
3712 cpu_to_le32(
3713 (wdata->nr_pages - 1) * wdata->pagesz -
3714 wdata->page_offset + wdata->tailsz
3715 );
3716 else
3717 req->RemainingBytes = cpu_to_le32(wdata->tailsz);
db223a59
LL		 3718 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
3719 if (need_invalidate)
3720 req->Channel = SMB2_CHANNEL_RDMA_V1;
3721 req->WriteChannelInfoOffset =
2026b06e 3722 cpu_to_le16(offsetof(struct smb2_write_req, Buffer));
db223a59 3723 req->WriteChannelInfoLength =
2026b06e 3724 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
db223a59 3725 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
2026b06e
SF		 3726 v1->offset = cpu_to_le64(wdata->mr->mr->iova);
3727 v1->token = cpu_to_le32(wdata->mr->mr->rkey);
3728 v1->length = cpu_to_le32(wdata->mr->mr->length);
db223a59
LL		 3729 }
3730#endif
c713c877
RS		 3731 iov[0].iov_len = total_len - 1;
3732 iov[0].iov_base = (char *)req;
33319141 3733
738f9de5 3734 rqst.rq_iov = iov;
c713c877 3735 rqst.rq_nvec = 1;
eddb079d 3736 rqst.rq_pages = wdata->pages;
57a929a6 3737 rqst.rq_offset = wdata->page_offset;
eddb079d
JL		 3738 rqst.rq_npages = wdata->nr_pages;
3739 rqst.rq_pagesz = wdata->pagesz;
3740 rqst.rq_tailsz = wdata->tailsz;
db223a59
LL		 3741#ifdef CONFIG_CIFS_SMB_DIRECT
3742 if (wdata->mr) {
c713c877 3743 iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1);
db223a59
LL		 3744 rqst.rq_npages = 0;
3745 }
3746#endif
f96637be
JP		 3747 cifs_dbg(FYI, "async write at %llu %u bytes\n",
3748 wdata->offset, wdata->bytes);
33319141 3749
db223a59
LL		 3750#ifdef CONFIG_CIFS_SMB_DIRECT
3751 /* For RDMA read, I/O size is in RemainingBytes not in Length */
3752 if (!wdata->mr)
3753 req->Length = cpu_to_le32(wdata->bytes);
3754#else
33319141 3755 req->Length = cpu_to_le32(wdata->bytes);
db223a59 3756#endif
33319141 3757
335b7b62 3758 if (wdata->credits.value > 0) {
31473fc4 3759 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
cb7e9eab 3760 SMB2_MAX_BUFFER_SIZE));
b983f7e9
PS		 3761 shdr->CreditRequest =
3762 cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 1);
9a1c67e8
PS		 3763
3764 rc = adjust_credits(server, &wdata->credits, wdata->bytes);
3765 if (rc)
335b7b62 3766 goto async_writev_out;
9a1c67e8 3767
7fb8986e 3768 flags |= CIFS_HAS_CREDITS;
cb7e9eab
PS		 3769 }
3770
33319141 3771 kref_get(&wdata->refcount);
9b7c18a2 3772 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
3349c3a7 3773 wdata, flags, &wdata->credits);
33319141 3774
e5d04887 3775 if (rc) {
eccb4422
SF		 3776 trace_smb3_write_err(0 /* no xid */, req->PersistentFileId,
3777 tcon->tid, tcon->ses->Suid, wdata->offset,
3778 wdata->bytes, rc);
4a5c80d7 3779 kref_put(&wdata->refcount, release);
e5d04887 3780 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
7d42e72f 3781 }
33319141 3782
33319141
PS		 3783async_writev_out:
3784 cifs_small_buf_release(req);
33319141
PS		 3785 return rc;
3786}
009d3443
PS		 3787
3788/*
3789 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
3790 * The length field from io_parms must be at least 1 and indicates a number of
3791 * elements with data to write that begins with position 1 in iov array. All
3792 * data length is specified by count.
3793 */
3794int
3795SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
3796 unsigned int *nbytes, struct kvec *iov, int n_vec)
3797{
40eff45b 3798 struct smb_rqst rqst;
009d3443
PS		 3799 int rc = 0;
3800 struct smb2_write_req *req = NULL;
3801 struct smb2_write_rsp *rsp = NULL;
3802 int resp_buftype;
da502f7d 3803 struct kvec rsp_iov;
7fb8986e 3804 int flags = 0;
f5688a6d 3805 unsigned int total_len;
da502f7d 3806
009d3443
PS		 3807 *nbytes = 0;
3808
3809 if (n_vec < 1)
3810 return rc;
3811
f5688a6d
RS		 3812 rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, (void **) &req,
3813 &total_len);
009d3443
PS		 3814 if (rc)
3815 return rc;
3816
3817 if (io_parms->tcon->ses->server == NULL)
3818 return -ECONNABORTED;
3819
5a77e75f 3820 if (smb3_encryption_required(io_parms->tcon))
7fb8986e
PS		 3821 flags |= CIFS_TRANSFORM_REQ;
3822
f5688a6d 3823 req->sync_hdr.ProcessId = cpu_to_le32(io_parms->pid);
009d3443
PS		 3824
3825 req->PersistentFileId = io_parms->persistent_fid;
3826 req->VolatileFileId = io_parms->volatile_fid;
3827 req->WriteChannelInfoOffset = 0;
3828 req->WriteChannelInfoLength = 0;
3829 req->Channel = 0;
3830 req->Length = cpu_to_le32(io_parms->length);
3831 req->Offset = cpu_to_le64(io_parms->offset);
009d3443 3832 req->DataOffset = cpu_to_le16(
f5688a6d 3833 offsetof(struct smb2_write_req, Buffer));
009d3443
PS		 3834 req->RemainingBytes = 0;
3835
d323c246
SF		 3836 trace_smb3_write_enter(xid, io_parms->persistent_fid,
3837 io_parms->tcon->tid, io_parms->tcon->ses->Suid,
3838 io_parms->offset, io_parms->length);
3839
009d3443 3840 iov[0].iov_base = (char *)req;
f5688a6d
RS		 3841 /* 1 for Buffer */
3842 iov[0].iov_len = total_len - 1;
009d3443 3843
40eff45b
RS		 3844 memset(&rqst, 0, sizeof(struct smb_rqst));
3845 rqst.rq_iov = iov;
3846 rqst.rq_nvec = n_vec + 1;
3847
3848 rc = cifs_send_recv(xid, io_parms->tcon->ses, &rqst,
f5688a6d 3849 &resp_buftype, flags, &rsp_iov);
da502f7d 3850 rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
009d3443
PS		 3851
3852 if (rc) {
eccb4422
SF		 3853 trace_smb3_write_err(xid, req->PersistentFileId,
3854 io_parms->tcon->tid,
3855 io_parms->tcon->ses->Suid,
3856 io_parms->offset, io_parms->length, rc);
009d3443 3857 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
f96637be 3858 cifs_dbg(VFS, "Send error in write = %d\n", rc);
eccb4422 3859 } else {
009d3443 3860 *nbytes = le32_to_cpu(rsp->DataLength);
eccb4422
SF		 3861 trace_smb3_write_done(xid, req->PersistentFileId,
3862 io_parms->tcon->tid,
3863 io_parms->tcon->ses->Suid,
3864 io_parms->offset, *nbytes);
3865 }
e5d04887 3866
6a3eb336 3867 cifs_small_buf_release(req);
e5d04887 3868 free_rsp_buf(resp_buftype, rsp);
009d3443
PS		 3869 return rc;
3870}
35143eb5 3871
d324f08d
PS		 3872static unsigned int
3873num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
3874{
3875 int len;
3876 unsigned int entrycount = 0;
3877 unsigned int next_offset = 0;
56446f21
DC		 3878 char *entryptr;
3879 FILE_DIRECTORY_INFO *dir_info;
d324f08d
PS		 3880
3881 if (bufstart == NULL)
3882 return 0;
3883
56446f21 3884 entryptr = bufstart;
d324f08d
PS		 3885
3886 while (1) {
56446f21
DC		 3887 if (entryptr + next_offset < entryptr ||
3888 entryptr + next_offset > end_of_buf ||
3889 entryptr + next_offset + size > end_of_buf) {
f96637be 3890 cifs_dbg(VFS, "malformed search entry would overflow\n");
d324f08d
PS		 3891 break;
3892 }
3893
56446f21
DC		 3894 entryptr = entryptr + next_offset;
3895 dir_info = (FILE_DIRECTORY_INFO *)entryptr;
3896
3897 len = le32_to_cpu(dir_info->FileNameLength);
3898 if (entryptr + len < entryptr ||
3899 entryptr + len > end_of_buf ||
3900 entryptr + len + size > end_of_buf) {
f96637be
JP		 3901 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
3902 end_of_buf);
d324f08d
PS		 3903 break;
3904 }
3905
56446f21 3906 *lastentry = entryptr;
d324f08d
PS		 3907 entrycount++;
3908
56446f21 3909 next_offset = le32_to_cpu(dir_info->NextEntryOffset);
d324f08d
PS		 3910 if (!next_offset)
3911 break;
3912 }
3913
3914 return entrycount;
3915}
3916
3917/*
3918 * Readdir/FindFirst
3919 */
3920int
3921SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
3922 u64 persistent_fid, u64 volatile_fid, int index,
3923 struct cifs_search_info *srch_inf)
3924{
40eff45b 3925 struct smb_rqst rqst;
d324f08d
PS		 3926 struct smb2_query_directory_req *req;
3927 struct smb2_query_directory_rsp *rsp = NULL;
3928 struct kvec iov[2];
da502f7d 3929 struct kvec rsp_iov;
d324f08d
PS		 3930 int rc = 0;
3931 int len;
75fdfc84 3932 int resp_buftype = CIFS_NO_BUFFER;
d324f08d
PS		 3933 unsigned char *bufptr;
3934 struct TCP_Server_Info *server;
3935 struct cifs_ses *ses = tcon->ses;
3936 __le16 asteriks = cpu_to_le16('*');
3937 char *end_of_smb;
3938 unsigned int output_size = CIFSMaxBufSize;
3939 size_t info_buf_size;
7fb8986e 3940 int flags = 0;
7c00c3a6 3941 unsigned int total_len;
d324f08d
PS		 3942
3943 if (ses && (ses->server))
3944 server = ses->server;
3945 else
3946 return -EIO;
3947
7c00c3a6
RS		 3948 rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req,
3949 &total_len);
d324f08d
PS		 3950 if (rc)
3951 return rc;
3952
5a77e75f 3953 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3954 flags |= CIFS_TRANSFORM_REQ;
3955
d324f08d
PS		 3956 switch (srch_inf->info_level) {
3957 case SMB_FIND_FILE_DIRECTORY_INFO:
3958 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
3959 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
3960 break;
3961 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
3962 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
3963 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
3964 break;
3965 default:
f96637be
JP		 3966 cifs_dbg(VFS, "info level %u isn't supported\n",
3967 srch_inf->info_level);
d324f08d
PS		 3968 rc = -EINVAL;
3969 goto qdir_exit;
3970 }
3971
3972 req->FileIndex = cpu_to_le32(index);
3973 req->PersistentFileId = persistent_fid;
3974 req->VolatileFileId = volatile_fid;
3975
3976 len = 0x2;
3977 bufptr = req->Buffer;
3978 memcpy(bufptr, &asteriks, len);
3979
3980 req->FileNameOffset =
7c00c3a6 3981 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1);
d324f08d
PS		 3982 req->FileNameLength = cpu_to_le16(len);
3983 /*
3984 * BB could be 30 bytes or so longer if we used SMB2 specific
3985 * buffer lengths, but this is safe and close enough.
3986 */
3987 output_size = min_t(unsigned int, output_size, server->maxBuf);
3988 output_size = min_t(unsigned int, output_size, 2 << 15);
3989 req->OutputBufferLength = cpu_to_le32(output_size);
3990
3991 iov[0].iov_base = (char *)req;
7c00c3a6
RS		 3992 /* 1 for Buffer */
3993 iov[0].iov_len = total_len - 1;
d324f08d
PS		 3994
3995 iov[1].iov_base = (char *)(req->Buffer);
3996 iov[1].iov_len = len;
3997
40eff45b
RS		 3998 memset(&rqst, 0, sizeof(struct smb_rqst));
3999 rqst.rq_iov = iov;
4000 rqst.rq_nvec = 2;
4001
d323c246
SF		 4002 trace_smb3_query_dir_enter(xid, persistent_fid, tcon->tid,
4003 tcon->ses->Suid, index, output_size);
4004
40eff45b 4005 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 4006 cifs_small_buf_release(req);
4007 rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
e5d04887 4008
d324f08d 4009 if (rc) {
31473fc4 4010 if (rc == -ENODATA &&
49f466bd 4011 rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
adb3b4e9
SF		 4012 trace_smb3_query_dir_done(xid, persistent_fid,
4013 tcon->tid, tcon->ses->Suid, index, 0);
52755808
PS		 4014 srch_inf->endOfSearch = true;
4015 rc = 0;
adb3b4e9
SF		 4016 } else {
4017 trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
4018 tcon->ses->Suid, index, 0, rc);
8e6e72ae 4019 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
adb3b4e9 4020 }
d324f08d
PS		 4021 goto qdir_exit;
4022 }
d324f08d 4023
730928c8
RS		 4024 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
4025 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
4026 info_buf_size);
adb3b4e9
SF		 4027 if (rc) {
4028 trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
4029 tcon->ses->Suid, index, 0, rc);
d324f08d 4030 goto qdir_exit;
adb3b4e9 4031 }
d324f08d
PS		 4032
4033 srch_inf->unicode = true;
4034
4035 if (srch_inf->ntwrk_buf_start) {
4036 if (srch_inf->smallBuf)
4037 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
4038 else
4039 cifs_buf_release(srch_inf->ntwrk_buf_start);
4040 }
4041 srch_inf->ntwrk_buf_start = (char *)rsp;
977b6170
RS		 4042 srch_inf->srch_entries_start = srch_inf->last_entry =
4043 (char *)rsp + le16_to_cpu(rsp->OutputBufferOffset);
4044 end_of_smb = rsp_iov.iov_len + (char *)rsp;
d324f08d
PS		 4045 srch_inf->entries_in_buffer =
4046 num_entries(srch_inf->srch_entries_start, end_of_smb,
4047 &srch_inf->last_entry, info_buf_size);
4048 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
f96637be
JP		 4049 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
4050 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
4051 srch_inf->srch_entries_start, srch_inf->last_entry);
d324f08d
PS		 4052 if (resp_buftype == CIFS_LARGE_BUFFER)
4053 srch_inf->smallBuf = false;
4054 else if (resp_buftype == CIFS_SMALL_BUFFER)
4055 srch_inf->smallBuf = true;
4056 else
f96637be 4057 cifs_dbg(VFS, "illegal search buffer type\n");
d324f08d 4058
adb3b4e9
SF		 4059 trace_smb3_query_dir_done(xid, persistent_fid, tcon->tid,
4060 tcon->ses->Suid, index, srch_inf->entries_in_buffer);
d324f08d
PS		 4061 return rc;
4062
4063qdir_exit:
4064 free_rsp_buf(resp_buftype, rsp);
4065 return rc;
4066}
4067
ba8ca116
RS		 4068int
4069SMB2_set_info_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
dac95340 4070 u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
ba8ca116 4071 u8 info_type, u32 additional_info,
dac95340 4072 void **data, unsigned int *size)
35143eb5
PS		 4073{
4074 struct smb2_set_info_req *req;
ba8ca116
RS		 4075 struct kvec *iov = rqst->rq_iov;
4076 unsigned int i, total_len;
4077 int rc;
35143eb5 4078
2fc803ef 4079 rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, (void **) &req, &total_len);
ba8ca116 4080 if (rc)
35143eb5 4081 return rc;
7fb8986e 4082
2fc803ef 4083 req->sync_hdr.ProcessId = cpu_to_le32(pid);
dac95340 4084 req->InfoType = info_type;
35143eb5
PS		 4085 req->FileInfoClass = info_class;
4086 req->PersistentFileId = persistent_fid;
4087 req->VolatileFileId = volatile_fid;
dac95340 4088 req->AdditionalInformation = cpu_to_le32(additional_info);
35143eb5 4089
35143eb5 4090 req->BufferOffset =
2fc803ef 4091 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1);
35143eb5
PS		 4092 req->BufferLength = cpu_to_le32(*size);
4093
35143eb5 4094 memcpy(req->Buffer, *data, *size);
2fc803ef 4095 total_len += *size;
35143eb5
PS		 4096
4097 iov[0].iov_base = (char *)req;
2fc803ef
RS		 4098 /* 1 for Buffer */
4099 iov[0].iov_len = total_len - 1;
35143eb5 4100
ba8ca116 4101 for (i = 1; i < rqst->rq_nvec; i++) {
35143eb5
PS		 4102 le32_add_cpu(&req->BufferLength, size[i]);
4103 iov[i].iov_base = (char *)data[i];
4104 iov[i].iov_len = size[i];
4105 }
4106
ba8ca116
RS		 4107 return 0;
4108}
4109
4110void
4111SMB2_set_info_free(struct smb_rqst *rqst)
4112{
32a1fb36
RS		 4113 if (rqst && rqst->rq_iov)
4114 cifs_buf_release(rqst->rq_iov[0].iov_base); /* request */
ba8ca116
RS		 4115}
4116
4117static int
4118send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
4119 u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
4120 u8 info_type, u32 additional_info, unsigned int num,
4121 void **data, unsigned int *size)
4122{
4123 struct smb_rqst rqst;
4124 struct smb2_set_info_rsp *rsp = NULL;
4125 struct kvec *iov;
4126 struct kvec rsp_iov;
4127 int rc = 0;
4128 int resp_buftype;
4129 struct cifs_ses *ses = tcon->ses;
4130 int flags = 0;
4131
4132 if (!ses || !(ses->server))
4133 return -EIO;
4134
4135 if (!num)
4136 return -EINVAL;
4137
4138 if (smb3_encryption_required(tcon))
4139 flags |= CIFS_TRANSFORM_REQ;
4140
4141 iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL);
4142 if (!iov)
4143 return -ENOMEM;
4144
40eff45b
RS		 4145 memset(&rqst, 0, sizeof(struct smb_rqst));
4146 rqst.rq_iov = iov;
4147 rqst.rq_nvec = num;
4148
ba8ca116
RS		 4149 rc = SMB2_set_info_init(tcon, &rqst, persistent_fid, volatile_fid, pid,
4150 info_class, info_type, additional_info,
4151 data, size);
4152 if (rc) {
4153 kfree(iov);
4154 return rc;
4155 }
4156
4157
40eff45b 4158 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
2fc803ef 4159 &rsp_iov);
ba8ca116 4160 SMB2_set_info_free(&rqst);
da502f7d 4161 rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
35143eb5 4162
eccb4422 4163 if (rc != 0) {
35143eb5 4164 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
eccb4422
SF		 4165 trace_smb3_set_info_err(xid, persistent_fid, tcon->tid,
4166 ses->Suid, info_class, (__u32)info_type, rc);
4167 }
7d3fb24b 4168
35143eb5
PS		 4169 free_rsp_buf(resp_buftype, rsp);
4170 kfree(iov);
4171 return rc;
4172}
4173
c839ff24
PS		 4174int
4175SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
3764cbd1 4176 u64 volatile_fid, u32 pid, __le64 *eof)
c839ff24
PS		 4177{
4178 struct smb2_file_eof_info info;
4179 void *data;
4180 unsigned int size;
4181
4182 info.EndOfFile = *eof;
4183
4184 data = &info;
4185 size = sizeof(struct smb2_file_eof_info);
4186
3764cbd1 4187 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 4188 pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE,
4189 0, 1, &data, &size);
c839ff24 4190}
1feeaac7 4191
dac95340
SP		 4192int
4193SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
4194 u64 persistent_fid, u64 volatile_fid,
4195 struct cifs_ntsd *pnntsd, int pacllen, int aclflag)
4196{
4197 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
4198 current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag,
4199 1, (void **)&pnntsd, &pacllen);
1feeaac7 4200}
983c88a4 4201
5517554e
RS		 4202int
4203SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
4204 u64 persistent_fid, u64 volatile_fid,
4205 struct smb2_file_full_ea_info *buf, int len)
4206{
4207 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
4208 current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE,
4209 0, 1, (void **)&buf, &len);
4210}
4211
983c88a4
PS		 4212int
4213SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
4214 const u64 persistent_fid, const u64 volatile_fid,
4215 __u8 oplock_level)
4216{
40eff45b 4217 struct smb_rqst rqst;
983c88a4 4218 int rc;
0d5a288d 4219 struct smb2_oplock_break *req = NULL;
21ad9487 4220 struct cifs_ses *ses = tcon->ses;
7fb8986e 4221 int flags = CIFS_OBREAK_OP;
21ad9487
RS		 4222 unsigned int total_len;
4223 struct kvec iov[1];
4224 struct kvec rsp_iov;
4225 int resp_buf_type;
983c88a4 4226
f96637be 4227 cifs_dbg(FYI, "SMB2_oplock_break\n");
21ad9487
RS		 4228 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
4229 &total_len);
983c88a4
PS		 4230 if (rc)
4231 return rc;
4232
5a77e75f 4233 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4234 flags |= CIFS_TRANSFORM_REQ;
4235
983c88a4
PS		 4236 req->VolatileFid = volatile_fid;
4237 req->PersistentFid = persistent_fid;
4238 req->OplockLevel = oplock_level;
21ad9487 4239 req->sync_hdr.CreditRequest = cpu_to_le16(1);
983c88a4 4240
392e1c5d 4241 flags |= CIFS_NO_RSP_BUF;
21ad9487
RS		 4242
4243 iov[0].iov_base = (char *)req;
4244 iov[0].iov_len = total_len;
4245
40eff45b
RS		 4246 memset(&rqst, 0, sizeof(struct smb_rqst));
4247 rqst.rq_iov = iov;
4248 rqst.rq_nvec = 1;
4249
4250 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
da502f7d 4251 cifs_small_buf_release(req);
983c88a4
PS		 4252
4253 if (rc) {
4254 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 4255 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
983c88a4
PS		 4256 }
4257
4258 return rc;
4259}
6fc05c25 4260
730928c8
RS		 4261void
4262smb2_copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
4263 struct kstatfs *kst)
6fc05c25
PS		 4264{
4265 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
4266 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
4267 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
42bec214
SP		 4268 kst->f_bfree = kst->f_bavail =
4269 le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
6fc05c25
PS		 4270 return;
4271}
4272
2d304217
SF		 4273static void
4274copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO *response_data,
4275 struct kstatfs *kst)
4276{
4277 kst->f_bsize = le32_to_cpu(response_data->BlockSize);
4278 kst->f_blocks = le64_to_cpu(response_data->TotalBlocks);
4279 kst->f_bfree = le64_to_cpu(response_data->BlocksAvail);
4280 if (response_data->UserBlocksAvail == cpu_to_le64(-1))
4281 kst->f_bavail = kst->f_bfree;
4282 else
4283 kst->f_bavail = le64_to_cpu(response_data->UserBlocksAvail);
4284 if (response_data->TotalFileNodes != cpu_to_le64(-1))
4285 kst->f_files = le64_to_cpu(response_data->TotalFileNodes);
4286 if (response_data->FreeFileNodes != cpu_to_le64(-1))
4287 kst->f_ffree = le64_to_cpu(response_data->FreeFileNodes);
4288
4289 return;
4290}
2d304217 4291
6fc05c25
PS		 4292static int
4293build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
4294 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
4295{
4296 int rc;
4297 struct smb2_query_info_req *req;
b2fb7fec 4298 unsigned int total_len;
6fc05c25 4299
f96637be 4300 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
6fc05c25
PS		 4301
4302 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
4303 return -EIO;
4304
b2fb7fec
RS		 4305 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
4306 &total_len);
6fc05c25
PS		 4307 if (rc)
4308 return rc;
4309
4310 req->InfoType = SMB2_O_INFO_FILESYSTEM;
4311 req->FileInfoClass = level;
4312 req->PersistentFileId = persistent_fid;
4313 req->VolatileFileId = volatile_fid;
b2fb7fec 4314 /* 1 for pad */
6fc05c25 4315 req->InputBufferOffset =
b2fb7fec 4316 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1);
6fc05c25 4317 req->OutputBufferLength = cpu_to_le32(
1fc6ad2f 4318 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1);
6fc05c25
PS		 4319
4320 iov->iov_base = (char *)req;
b2fb7fec 4321 iov->iov_len = total_len;
6fc05c25
PS		 4322 return 0;
4323}
4324
2d304217
SF		 4325int
4326SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon,
4327 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
4328{
4329 struct smb_rqst rqst;
4330 struct smb2_query_info_rsp *rsp = NULL;
4331 struct kvec iov;
4332 struct kvec rsp_iov;
4333 int rc = 0;
4334 int resp_buftype;
4335 struct cifs_ses *ses = tcon->ses;
4336 FILE_SYSTEM_POSIX_INFO *info = NULL;
4337 int flags = 0;
4338
4339 rc = build_qfs_info_req(&iov, tcon, FS_POSIX_INFORMATION,
4340 sizeof(FILE_SYSTEM_POSIX_INFO),
4341 persistent_fid, volatile_fid);
4342 if (rc)
4343 return rc;
4344
4345 if (smb3_encryption_required(tcon))
4346 flags |= CIFS_TRANSFORM_REQ;
4347
4348 memset(&rqst, 0, sizeof(struct smb_rqst));
4349 rqst.rq_iov = &iov;
4350 rqst.rq_nvec = 1;
4351
4352 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
4353 cifs_small_buf_release(iov.iov_base);
4354 if (rc) {
4355 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
4356 goto posix_qfsinf_exit;
4357 }
4358 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
4359
4360 info = (FILE_SYSTEM_POSIX_INFO *)(
4361 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
730928c8
RS		 4362 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
4363 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
4364 sizeof(FILE_SYSTEM_POSIX_INFO));
2d304217
SF		 4365 if (!rc)
4366 copy_posix_fs_info_to_kstatfs(info, fsdata);
4367
4368posix_qfsinf_exit:
4369 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
4370 return rc;
4371}
2d304217 4372
6fc05c25
PS		 4373int
4374SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
4375 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
4376{
40eff45b 4377 struct smb_rqst rqst;
6fc05c25
PS		 4378 struct smb2_query_info_rsp *rsp = NULL;
4379 struct kvec iov;
da502f7d 4380 struct kvec rsp_iov;
6fc05c25
PS		 4381 int rc = 0;
4382 int resp_buftype;
4383 struct cifs_ses *ses = tcon->ses;
4384 struct smb2_fs_full_size_info *info = NULL;
7fb8986e 4385 int flags = 0;
6fc05c25
PS		 4386
4387 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
4388 sizeof(struct smb2_fs_full_size_info),
4389 persistent_fid, volatile_fid);
4390 if (rc)
4391 return rc;
4392
5a77e75f 4393 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4394 flags |= CIFS_TRANSFORM_REQ;
4395
40eff45b
RS		 4396 memset(&rqst, 0, sizeof(struct smb_rqst));
4397 rqst.rq_iov = &iov;
4398 rqst.rq_nvec = 1;
4399
4400 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 4401 cifs_small_buf_release(iov.iov_base);
6fc05c25
PS		 4402 if (rc) {
4403 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
34f62640 4404 goto qfsinf_exit;
6fc05c25 4405 }
da502f7d 4406 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
6fc05c25 4407
1fc6ad2f 4408 info = (struct smb2_fs_full_size_info *)(
49f466bd 4409 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
730928c8
RS		 4410 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
4411 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
4412 sizeof(struct smb2_fs_full_size_info));
6fc05c25 4413 if (!rc)
730928c8 4414 smb2_copy_fs_info_to_kstatfs(info, fsdata);
6fc05c25 4415
34f62640 4416qfsinf_exit:
da502f7d 4417 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
34f62640
SF		 4418 return rc;
4419}
4420
4421int
4422SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2167114c 4423 u64 persistent_fid, u64 volatile_fid, int level)
34f62640 4424{
40eff45b 4425 struct smb_rqst rqst;
34f62640
SF		 4426 struct smb2_query_info_rsp *rsp = NULL;
4427 struct kvec iov;
da502f7d 4428 struct kvec rsp_iov;
34f62640 4429 int rc = 0;
2167114c 4430 int resp_buftype, max_len, min_len;
34f62640
SF		 4431 struct cifs_ses *ses = tcon->ses;
4432 unsigned int rsp_len, offset;
7fb8986e 4433 int flags = 0;
34f62640 4434
2167114c
SF		 4435 if (level == FS_DEVICE_INFORMATION) {
4436 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
4437 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
4438 } else if (level == FS_ATTRIBUTE_INFORMATION) {
4439 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
4440 min_len = MIN_FS_ATTR_INFO_SIZE;
af6a12ea
SF		 4441 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
4442 max_len = sizeof(struct smb3_fs_ss_info);
4443 min_len = sizeof(struct smb3_fs_ss_info);
21ba3845
SF		 4444 } else if (level == FS_VOLUME_INFORMATION) {
4445 max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN;
4446 min_len = sizeof(struct smb3_fs_vol_info);
2167114c 4447 } else {
af6a12ea 4448 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2167114c
SF		 4449 return -EINVAL;
4450 }
4451
4452 rc = build_qfs_info_req(&iov, tcon, level, max_len,
34f62640
SF		 4453 persistent_fid, volatile_fid);
4454 if (rc)
4455 return rc;
4456
5a77e75f 4457 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4458 flags |= CIFS_TRANSFORM_REQ;
4459
40eff45b
RS		 4460 memset(&rqst, 0, sizeof(struct smb_rqst));
4461 rqst.rq_iov = &iov;
4462 rqst.rq_nvec = 1;
4463
4464 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 4465 cifs_small_buf_release(iov.iov_base);
34f62640
SF		 4466 if (rc) {
4467 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
4468 goto qfsattr_exit;
4469 }
da502f7d 4470 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
34f62640
SF		 4471
4472 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
4473 offset = le16_to_cpu(rsp->OutputBufferOffset);
730928c8 4474 rc = smb2_validate_iov(offset, rsp_len, &rsp_iov, min_len);
2167114c
SF		 4475 if (rc)
4476 goto qfsattr_exit;
4477
4478 if (level == FS_ATTRIBUTE_INFORMATION)
1fc6ad2f 4479 memcpy(&tcon->fsAttrInfo, offset
49f466bd 4480 + (char *)rsp, min_t(unsigned int,
2167114c
SF		 4481 rsp_len, max_len));
4482 else if (level == FS_DEVICE_INFORMATION)
1fc6ad2f 4483 memcpy(&tcon->fsDevInfo, offset
49f466bd 4484 + (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO));
af6a12ea
SF		 4485 else if (level == FS_SECTOR_SIZE_INFORMATION) {
4486 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
1fc6ad2f 4487 (offset + (char *)rsp);
af6a12ea
SF		 4488 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
4489 tcon->perf_sector_size =
4490 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
21ba3845
SF		 4491 } else if (level == FS_VOLUME_INFORMATION) {
4492 struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *)
4493 (offset + (char *)rsp);
4494 tcon->vol_serial_number = vol_info->VolumeSerialNumber;
4495 tcon->vol_create_time = vol_info->VolumeCreationTime;
af6a12ea 4496 }
34f62640
SF		 4497
4498qfsattr_exit:
da502f7d 4499 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
6fc05c25
PS		 4500 return rc;
4501}
f7ba7fe6
PS		 4502
4503int
4504smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
4505 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
4506 const __u32 num_lock, struct smb2_lock_element *buf)
4507{
40eff45b 4508 struct smb_rqst rqst;
f7ba7fe6
PS		 4509 int rc = 0;
4510 struct smb2_lock_req *req = NULL;
4511 struct kvec iov[2];
da502f7d 4512 struct kvec rsp_iov;
f7ba7fe6
PS		 4513 int resp_buf_type;
4514 unsigned int count;
392e1c5d 4515 int flags = CIFS_NO_RSP_BUF;
ced93679 4516 unsigned int total_len;
f7ba7fe6 4517
f96637be 4518 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
f7ba7fe6 4519
ced93679 4520 rc = smb2_plain_req_init(SMB2_LOCK, tcon, (void **) &req, &total_len);
f7ba7fe6
PS		 4521 if (rc)
4522 return rc;
4523
5a77e75f 4524 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4525 flags |= CIFS_TRANSFORM_REQ;
4526
ced93679 4527 req->sync_hdr.ProcessId = cpu_to_le32(pid);
f7ba7fe6
PS		 4528 req->LockCount = cpu_to_le16(num_lock);
4529
4530 req->PersistentFileId = persist_fid;
4531 req->VolatileFileId = volatile_fid;
4532
4533 count = num_lock * sizeof(struct smb2_lock_element);
f7ba7fe6
PS		 4534
4535 iov[0].iov_base = (char *)req;
ced93679 4536 iov[0].iov_len = total_len - sizeof(struct smb2_lock_element);
f7ba7fe6
PS		 4537 iov[1].iov_base = (char *)buf;
4538 iov[1].iov_len = count;
4539
4540 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
40eff45b
RS		 4541
4542 memset(&rqst, 0, sizeof(struct smb_rqst));
4543 rqst.rq_iov = iov;
4544 rqst.rq_nvec = 2;
4545
4546 rc = cifs_send_recv(xid, tcon->ses, &rqst, &resp_buf_type, flags,
ced93679 4547 &rsp_iov);
da502f7d 4548 cifs_small_buf_release(req);
f7ba7fe6 4549 if (rc) {
f96637be 4550 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
f7ba7fe6 4551 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
eccb4422
SF		 4552 trace_smb3_lock_err(xid, persist_fid, tcon->tid,
4553 tcon->ses->Suid, rc);
f7ba7fe6
PS		 4554 }
4555
4556 return rc;
4557}
4558
4559int
4560SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
4561 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
4562 const __u64 length, const __u64 offset, const __u32 lock_flags,
4563 const bool wait)
4564{
4565 struct smb2_lock_element lock;
4566
4567 lock.Offset = cpu_to_le64(offset);
4568 lock.Length = cpu_to_le64(length);
4569 lock.Flags = cpu_to_le32(lock_flags);
4570 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
4571 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
4572
4573 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
4574}
0822f514
PS		 4575
4576int
4577SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
4578 __u8 *lease_key, const __le32 lease_state)
4579{
40eff45b 4580 struct smb_rqst rqst;
0822f514
PS		 4581 int rc;
4582 struct smb2_lease_ack *req = NULL;
8eb7998e 4583 struct cifs_ses *ses = tcon->ses;
7fb8986e 4584 int flags = CIFS_OBREAK_OP;
8eb7998e
RS		 4585 unsigned int total_len;
4586 struct kvec iov[1];
4587 struct kvec rsp_iov;
4588 int resp_buf_type;
179e44d4
SF		 4589 __u64 *please_key_high;
4590 __u64 *please_key_low;
0822f514 4591
f96637be 4592 cifs_dbg(FYI, "SMB2_lease_break\n");
8eb7998e
RS		 4593 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
4594 &total_len);
0822f514
PS		 4595 if (rc)
4596 return rc;
4597
5a77e75f 4598 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4599 flags |= CIFS_TRANSFORM_REQ;
4600
8eb7998e 4601 req->sync_hdr.CreditRequest = cpu_to_le16(1);
0822f514 4602 req->StructureSize = cpu_to_le16(36);
8eb7998e 4603 total_len += 12;
0822f514
PS		 4604
4605 memcpy(req->LeaseKey, lease_key, 16);
4606 req->LeaseState = lease_state;
4607
392e1c5d 4608 flags |= CIFS_NO_RSP_BUF;
8eb7998e
RS		 4609
4610 iov[0].iov_base = (char *)req;
4611 iov[0].iov_len = total_len;
4612
40eff45b
RS		 4613 memset(&rqst, 0, sizeof(struct smb_rqst));
4614 rqst.rq_iov = iov;
4615 rqst.rq_nvec = 1;
4616
4617 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
da502f7d 4618 cifs_small_buf_release(req);
0822f514 4619
d339adc1
AA		 4620 please_key_low = (__u64 *)lease_key;
4621 please_key_high = (__u64 *)(lease_key+8);
0822f514
PS		 4622 if (rc) {
4623 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
179e44d4
SF		 4624 trace_smb3_lease_err(le32_to_cpu(lease_state), tcon->tid,
4625 ses->Suid, *please_key_low, *please_key_high, rc);
f96637be 4626 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
179e44d4
SF		 4627 } else
4628 trace_smb3_lease_done(le32_to_cpu(lease_state), tcon->tid,
4629 ses->Suid, *please_key_low, *please_key_high);
0822f514
PS		 4630
4631 return rc;
4632}
Linux 6.x block layer and io_uring tree(s)