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cifs: Fix lease buffer length error
[thirdparty/kernel/linux.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
0fdfef9a 462
ebb3a9d4
SF		 463#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
464#define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
fcef0db6 465#define SMB2_POSIX_EXTENSIONS_AVAILABLE cpu_to_le16(0x100)
ebb3a9d4
SF		 466
467static void
468build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
469{
470 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
471 pneg_ctxt->DataLength = cpu_to_le16(38);
472 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
473 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
474 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
475 pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
476}
477
478static void
479build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
480{
481 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
23657ad7
SF		 482 pneg_ctxt->DataLength = cpu_to_le16(4); /* Cipher Count + le16 cipher */
483 pneg_ctxt->CipherCount = cpu_to_le16(1);
484/* pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;*/ /* not supported yet */
485 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_CCM;
ebb3a9d4
SF		 486}
487
fcef0db6
SF		 488static void
489build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
490{
491 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
492 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
0d481325
SF		 493 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
494 pneg_ctxt->Name[0] = 0x93;
495 pneg_ctxt->Name[1] = 0xAD;
496 pneg_ctxt->Name[2] = 0x25;
497 pneg_ctxt->Name[3] = 0x50;
498 pneg_ctxt->Name[4] = 0x9C;
499 pneg_ctxt->Name[5] = 0xB4;
500 pneg_ctxt->Name[6] = 0x11;
501 pneg_ctxt->Name[7] = 0xE7;
502 pneg_ctxt->Name[8] = 0xB4;
503 pneg_ctxt->Name[9] = 0x23;
504 pneg_ctxt->Name[10] = 0x83;
505 pneg_ctxt->Name[11] = 0xDE;
506 pneg_ctxt->Name[12] = 0x96;
507 pneg_ctxt->Name[13] = 0x8B;
508 pneg_ctxt->Name[14] = 0xCD;
509 pneg_ctxt->Name[15] = 0x7C;
fcef0db6
SF		 510}
511
ebb3a9d4 512static void
13cacea7
RS		 513assemble_neg_contexts(struct smb2_negotiate_req *req,
514 unsigned int *total_len)
ebb3a9d4 515{
d5c7076b 516 char *pneg_ctxt = (char *)req;
fcef0db6 517 unsigned int ctxt_len;
ebb3a9d4 518
d5c7076b
SF		 519 if (*total_len > 200) {
520 /* In case length corrupted don't want to overrun smb buffer */
521 cifs_dbg(VFS, "Bad frame length assembling neg contexts\n");
522 return;
523 }
524
525 /*
526 * round up total_len of fixed part of SMB3 negotiate request to 8
527 * byte boundary before adding negotiate contexts
528 */
529 *total_len = roundup(*total_len, 8);
530
531 pneg_ctxt = (*total_len) + (char *)req;
532 req->NegotiateContextOffset = cpu_to_le32(*total_len);
533
ebb3a9d4 534 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
fcef0db6
SF		 535 ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_preauth_neg_context), 8) * 8;
536 *total_len += ctxt_len;
537 pneg_ctxt += ctxt_len;
13cacea7 538
ebb3a9d4 539 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
fcef0db6
SF		 540 ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_encryption_neg_context), 8) * 8;
541 *total_len += ctxt_len;
542 pneg_ctxt += ctxt_len;
543
544 build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
545 *total_len += sizeof(struct smb2_posix_neg_context);
13cacea7 546
fcef0db6 547 req->NegotiateContextCount = cpu_to_le16(3);
ebb3a9d4 548}
5100d8a3
SF		 549
550static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt)
551{
552 unsigned int len = le16_to_cpu(ctxt->DataLength);
553
554 /* If invalid preauth context warn but use what we requested, SHA-512 */
555 if (len < MIN_PREAUTH_CTXT_DATA_LEN) {
556 printk_once(KERN_WARNING "server sent bad preauth context\n");
557 return;
558 }
559 if (le16_to_cpu(ctxt->HashAlgorithmCount) != 1)
560 printk_once(KERN_WARNING "illegal SMB3 hash algorithm count\n");
561 if (ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
562 printk_once(KERN_WARNING "unknown SMB3 hash algorithm\n");
563}
564
565static int decode_encrypt_ctx(struct TCP_Server_Info *server,
566 struct smb2_encryption_neg_context *ctxt)
567{
568 unsigned int len = le16_to_cpu(ctxt->DataLength);
569
570 cifs_dbg(FYI, "decode SMB3.11 encryption neg context of len %d\n", len);
571 if (len < MIN_ENCRYPT_CTXT_DATA_LEN) {
572 printk_once(KERN_WARNING "server sent bad crypto ctxt len\n");
573 return -EINVAL;
574 }
575
576 if (le16_to_cpu(ctxt->CipherCount) != 1) {
577 printk_once(KERN_WARNING "illegal SMB3.11 cipher count\n");
578 return -EINVAL;
579 }
580 cifs_dbg(FYI, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt->Ciphers[0]));
581 if ((ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_CCM) &&
582 (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_GCM)) {
583 printk_once(KERN_WARNING "invalid SMB3.11 cipher returned\n");
584 return -EINVAL;
585 }
586 server->cipher_type = ctxt->Ciphers[0];
23657ad7 587 server->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
5100d8a3
SF		 588 return 0;
589}
590
591static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp,
977b6170
RS		 592 struct TCP_Server_Info *server,
593 unsigned int len_of_smb)
5100d8a3
SF		 594{
595 struct smb2_neg_context *pctx;
596 unsigned int offset = le32_to_cpu(rsp->NegotiateContextOffset);
597 unsigned int ctxt_cnt = le16_to_cpu(rsp->NegotiateContextCount);
5100d8a3
SF		 598 unsigned int len_of_ctxts, i;
599 int rc = 0;
600
601 cifs_dbg(FYI, "decoding %d negotiate contexts\n", ctxt_cnt);
602 if (len_of_smb <= offset) {
603 cifs_dbg(VFS, "Invalid response: negotiate context offset\n");
604 return -EINVAL;
605 }
606
607 len_of_ctxts = len_of_smb - offset;
608
609 for (i = 0; i < ctxt_cnt; i++) {
610 int clen;
611 /* check that offset is not beyond end of SMB */
612 if (len_of_ctxts == 0)
613 break;
614
615 if (len_of_ctxts < sizeof(struct smb2_neg_context))
616 break;
617
1fc6ad2f 618 pctx = (struct smb2_neg_context *)(offset + (char *)rsp);
5100d8a3
SF		 619 clen = le16_to_cpu(pctx->DataLength);
620 if (clen > len_of_ctxts)
621 break;
622
623 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES)
624 decode_preauth_context(
625 (struct smb2_preauth_neg_context *)pctx);
626 else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES)
627 rc = decode_encrypt_ctx(server,
628 (struct smb2_encryption_neg_context *)pctx);
fcef0db6
SF		 629 else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE)
630 server->posix_ext_supported = true;
5100d8a3
SF		 631 else
632 cifs_dbg(VFS, "unknown negcontext of type %d ignored\n",
633 le16_to_cpu(pctx->ContextType));
634
635 if (rc)
636 break;
637 /* offsets must be 8 byte aligned */
638 clen = (clen + 7) & ~0x7;
639 offset += clen + sizeof(struct smb2_neg_context);
640 len_of_ctxts -= clen;
641 }
642 return rc;
643}
644
ce558b0e
SF		 645static struct create_posix *
646create_posix_buf(umode_t mode)
647{
648 struct create_posix *buf;
649
650 buf = kzalloc(sizeof(struct create_posix),
651 GFP_KERNEL);
652 if (!buf)
653 return NULL;
654
655 buf->ccontext.DataOffset =
656 cpu_to_le16(offsetof(struct create_posix, Mode));
657 buf->ccontext.DataLength = cpu_to_le32(4);
658 buf->ccontext.NameOffset =
659 cpu_to_le16(offsetof(struct create_posix, Name));
660 buf->ccontext.NameLength = cpu_to_le16(16);
661
662 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
663 buf->Name[0] = 0x93;
664 buf->Name[1] = 0xAD;
665 buf->Name[2] = 0x25;
666 buf->Name[3] = 0x50;
667 buf->Name[4] = 0x9C;
668 buf->Name[5] = 0xB4;
669 buf->Name[6] = 0x11;
670 buf->Name[7] = 0xE7;
671 buf->Name[8] = 0xB4;
672 buf->Name[9] = 0x23;
673 buf->Name[10] = 0x83;
674 buf->Name[11] = 0xDE;
675 buf->Name[12] = 0x96;
676 buf->Name[13] = 0x8B;
677 buf->Name[14] = 0xCD;
678 buf->Name[15] = 0x7C;
679 buf->Mode = cpu_to_le32(mode);
680 cifs_dbg(FYI, "mode on posix create 0%o", mode);
681 return buf;
682}
683
684static int
685add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode)
686{
687 struct smb2_create_req *req = iov[0].iov_base;
688 unsigned int num = *num_iovec;
689
690 iov[num].iov_base = create_posix_buf(mode);
691 if (iov[num].iov_base == NULL)
692 return -ENOMEM;
693 iov[num].iov_len = sizeof(struct create_posix);
694 if (!req->CreateContextsOffset)
695 req->CreateContextsOffset = cpu_to_le32(
696 sizeof(struct smb2_create_req) +
697 iov[num - 1].iov_len);
698 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_posix));
699 *num_iovec = num + 1;
700 return 0;
701}
702
ebb3a9d4 703
ec2e4523
PS		 704/*
705 *
706 * SMB2 Worker functions follow:
707 *
708 * The general structure of the worker functions is:
709 * 1) Call smb2_init (assembles SMB2 header)
710 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
711 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
712 * 4) Decode SMB2 command specific fields in the fixed length area
713 * 5) Decode variable length data area (if any for this SMB2 command type)
714 * 6) Call free smb buffer
715 * 7) return
716 *
717 */
718
719int
720SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
721{
40eff45b 722 struct smb_rqst rqst;
ec2e4523
PS		 723 struct smb2_negotiate_req *req;
724 struct smb2_negotiate_rsp *rsp;
725 struct kvec iov[1];
da502f7d 726 struct kvec rsp_iov;
ec2e4523
PS		 727 int rc = 0;
728 int resp_buftype;
3534b850 729 struct TCP_Server_Info *server = ses->server;
ec2e4523
PS		 730 int blob_offset, blob_length;
731 char *security_blob;
732 int flags = CIFS_NEG_OP;
13cacea7 733 unsigned int total_len;
ec2e4523 734
f96637be 735 cifs_dbg(FYI, "Negotiate protocol\n");
ec2e4523 736
3534b850
JL		 737 if (!server) {
738 WARN(1, "%s: server is NULL!\n", __func__);
739 return -EIO;
ec2e4523
PS		 740 }
741
13cacea7 742 rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, (void **) &req, &total_len);
ec2e4523
PS		 743 if (rc)
744 return rc;
745
13cacea7 746 req->sync_hdr.SessionId = 0;
0fdfef9a 747
8bd68c6e
AA		 748 memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
749 memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
ec2e4523 750
9764c02f
SF		 751 if (strcmp(ses->server->vals->version_string,
752 SMB3ANY_VERSION_STRING) == 0) {
753 req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
754 req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
755 req->DialectCount = cpu_to_le16(2);
13cacea7 756 total_len += 4;
9764c02f
SF		 757 } else if (strcmp(ses->server->vals->version_string,
758 SMBDEFAULT_VERSION_STRING) == 0) {
759 req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
760 req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
761 req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
d5c7076b
SF		 762 req->Dialects[3] = cpu_to_le16(SMB311_PROT_ID);
763 req->DialectCount = cpu_to_le16(4);
764 total_len += 8;
9764c02f
SF		 765 } else {
766 /* otherwise send specific dialect */
767 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
768 req->DialectCount = cpu_to_le16(1);
13cacea7 769 total_len += 2;
9764c02f 770 }
ec2e4523
PS		 771
772 /* only one of SMB2 signing flags may be set in SMB2 request */
38d77c50 773 if (ses->sign)
9cd2e62c 774 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
38d77c50 775 else if (global_secflags & CIFSSEC_MAY_SIGN)
9cd2e62c 776 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
38d77c50
JL		 777 else
778 req->SecurityMode = 0;
ec2e4523 779
e4aa25e7 780 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
ec2e4523 781
3c5f9be1
SF		 782 /* ClientGUID must be zero for SMB2.02 dialect */
783 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
784 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
ebb3a9d4 785 else {
3c5f9be1
SF		 786 memcpy(req->ClientGUID, server->client_guid,
787 SMB2_CLIENT_GUID_SIZE);
d5c7076b
SF		 788 if ((ses->server->vals->protocol_id == SMB311_PROT_ID) ||
789 (strcmp(ses->server->vals->version_string,
790 SMBDEFAULT_VERSION_STRING) == 0))
13cacea7 791 assemble_neg_contexts(req, &total_len);
ebb3a9d4 792 }
ec2e4523 793 iov[0].iov_base = (char *)req;
13cacea7 794 iov[0].iov_len = total_len;
ec2e4523 795
40eff45b
RS		 796 memset(&rqst, 0, sizeof(struct smb_rqst));
797 rqst.rq_iov = iov;
798 rqst.rq_nvec = 1;
799
800 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 801 cifs_small_buf_release(req);
802 rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base;
ec2e4523
PS		 803 /*
804 * No tcon so can't do
805 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
806 */
7e682f76
SF		 807 if (rc == -EOPNOTSUPP) {
808 cifs_dbg(VFS, "Dialect not supported by server. Consider "
9764c02f 809 "specifying vers=1.0 or vers=2.0 on mount for accessing"
7e682f76
SF		 810 " older servers\n");
811 goto neg_exit;
812 } else if (rc != 0)
ec2e4523
PS		 813 goto neg_exit;
814
9764c02f
SF		 815 if (strcmp(ses->server->vals->version_string,
816 SMB3ANY_VERSION_STRING) == 0) {
817 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
818 cifs_dbg(VFS,
819 "SMB2 dialect returned but not requested\n");
820 return -EIO;
821 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
822 cifs_dbg(VFS,
823 "SMB2.1 dialect returned but not requested\n");
824 return -EIO;
825 }
826 } else if (strcmp(ses->server->vals->version_string,
827 SMBDEFAULT_VERSION_STRING) == 0) {
828 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
829 cifs_dbg(VFS,
830 "SMB2 dialect returned but not requested\n");
831 return -EIO;
832 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
833 /* ops set to 3.0 by default for default so update */
834 ses->server->ops = &smb21_operations;
b57a55e2
Z		 835 ses->server->vals = &smb21_values;
836 } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
d5c7076b 837 ses->server->ops = &smb311_operations;
b57a55e2
Z		 838 ses->server->vals = &smb311_values;
839 }
590d08d3
SF		 840 } else if (le16_to_cpu(rsp->DialectRevision) !=
841 ses->server->vals->protocol_id) {
9764c02f
SF		 842 /* if requested single dialect ensure returned dialect matched */
843 cifs_dbg(VFS, "Illegal 0x%x dialect returned: not requested\n",
590d08d3 844 le16_to_cpu(rsp->DialectRevision));
9764c02f
SF		 845 return -EIO;
846 }
847
f96637be 848 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
ec2e4523 849
e4aa25e7 850 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
f96637be 851 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
e4aa25e7 852 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
f96637be 853 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
e4aa25e7 854 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
f96637be 855 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
20b6d8b4
SF		 856 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
857 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
5f7fbf73
SF		 858 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
859 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
ec2e4523 860 else {
f799d623 861 cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
f96637be 862 le16_to_cpu(rsp->DialectRevision));
ec2e4523
PS		 863 rc = -EIO;
864 goto neg_exit;
865 }
866 server->dialect = le16_to_cpu(rsp->DialectRevision);
867
8bd68c6e
AA		 868 /*
869 * Keep a copy of the hash after negprot. This hash will be
870 * the starting hash value for all sessions made from this
871 * server.
872 */
873 memcpy(server->preauth_sha_hash, ses->preauth_sha_hash,
874 SMB2_PREAUTH_HASH_SIZE);
0fdfef9a 875
e598d1d8
JL		 876 /* SMB2 only has an extended negflavor */
877 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
2365c4ea
PS		 878 /* set it to the maximum buffer size value we can send with 1 credit */
879 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
880 SMB2_MAX_BUFFER_SIZE);
ec2e4523
PS		 881 server->max_read = le32_to_cpu(rsp->MaxReadSize);
882 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
ec2e4523 883 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
07108d0e
SF		 884 if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode)
885 cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n",
886 server->sec_mode);
ec2e4523 887 server->capabilities = le32_to_cpu(rsp->Capabilities);
29e20f9c
PS		 888 /* Internal types */
889 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
ec2e4523
PS		 890
891 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
49f466bd 892 (struct smb2_sync_hdr *)rsp);
5d875cc9
SF		 893 /*
894 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
895 * for us will be
896 * ses->sectype = RawNTLMSSP;
897 * but for time being this is our only auth choice so doesn't matter.
898 * We just found a server which sets blob length to zero expecting raw.
899 */
67dbea2c 900 if (blob_length == 0) {
5d875cc9 901 cifs_dbg(FYI, "missing security blob on negprot\n");
67dbea2c
PS		 902 server->sec_ntlmssp = true;
903 }
3c1bf7e4 904
38d77c50 905 rc = cifs_enable_signing(server, ses->sign);
9ddec561
JL		 906 if (rc)
907 goto neg_exit;
ceb1b0b9 908 if (blob_length) {
ebdd207e 909 rc = decode_negTokenInit(security_blob, blob_length, server);
ceb1b0b9
SF		 910 if (rc == 1)
911 rc = 0;
912 else if (rc == 0)
913 rc = -EIO;
ec2e4523 914 }
5100d8a3 915
5100d8a3
SF		 916 if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
917 if (rsp->NegotiateContextCount)
977b6170
RS		 918 rc = smb311_decode_neg_context(rsp, server,
919 rsp_iov.iov_len);
5100d8a3
SF		 920 else
921 cifs_dbg(VFS, "Missing expected negotiate contexts\n");
922 }
ec2e4523
PS		 923neg_exit:
924 free_rsp_buf(resp_buftype, rsp);
925 return rc;
926}
5478f9ba 927
ff1c038a
SF		 928int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
929{
2796d303
LL		 930 int rc;
931 struct validate_negotiate_info_req *pneg_inbuf;
fe83bebc 932 struct validate_negotiate_info_rsp *pneg_rsp = NULL;
ff1c038a 933 u32 rsplen;
9764c02f 934 u32 inbuflen; /* max of 4 dialects */
ff1c038a
SF		 935
936 cifs_dbg(FYI, "validate negotiate\n");
937
8bd68c6e
AA		 938 /* In SMB3.11 preauth integrity supersedes validate negotiate */
939 if (tcon->ses->server->dialect == SMB311_PROT_ID)
940 return 0;
941
ff1c038a
SF		 942 /*
943 * validation ioctl must be signed, so no point sending this if we
0603c96f
SF		 944 * can not sign it (ie are not known user). Even if signing is not
945 * required (enabled but not negotiated), in those cases we selectively
ff1c038a 946 * sign just this, the first and only signed request on a connection.
0603c96f 947 * Having validation of negotiate info helps reduce attack vectors.
ff1c038a 948 */
0603c96f 949 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
ff1c038a
SF		 950 return 0; /* validation requires signing */
951
0603c96f
SF		 952 if (tcon->ses->user_name == NULL) {
953 cifs_dbg(FYI, "Can't validate negotiate: null user mount\n");
954 return 0; /* validation requires signing */
955 }
956
957 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
958 cifs_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n");
959
2796d303
LL		 960 pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS);
961 if (!pneg_inbuf)
962 return -ENOMEM;
963
964 pneg_inbuf->Capabilities =
ff1c038a 965 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
2796d303 966 memcpy(pneg_inbuf->Guid, tcon->ses->server->client_guid,
39552ea8 967 SMB2_CLIENT_GUID_SIZE);
ff1c038a
SF		 968
969 if (tcon->ses->sign)
2796d303 970 pneg_inbuf->SecurityMode =
ff1c038a
SF		 971 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
972 else if (global_secflags & CIFSSEC_MAY_SIGN)
2796d303 973 pneg_inbuf->SecurityMode =
ff1c038a
SF		 974 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
975 else
2796d303 976 pneg_inbuf->SecurityMode = 0;
ff1c038a 977
9764c02f
SF		 978
979 if (strcmp(tcon->ses->server->vals->version_string,
980 SMB3ANY_VERSION_STRING) == 0) {
2796d303
LL		 981 pneg_inbuf->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
982 pneg_inbuf->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
983 pneg_inbuf->DialectCount = cpu_to_le16(2);
9764c02f 984 /* structure is big enough for 3 dialects, sending only 2 */
2796d303 985 inbuflen = sizeof(*pneg_inbuf) -
d5c7076b 986 (2 * sizeof(pneg_inbuf->Dialects[0]));
9764c02f
SF		 987 } else if (strcmp(tcon->ses->server->vals->version_string,
988 SMBDEFAULT_VERSION_STRING) == 0) {
2796d303
LL		 989 pneg_inbuf->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
990 pneg_inbuf->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
991 pneg_inbuf->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
d5c7076b
SF		 992 pneg_inbuf->Dialects[3] = cpu_to_le16(SMB311_PROT_ID);
993 pneg_inbuf->DialectCount = cpu_to_le16(4);
9764c02f 994 /* structure is big enough for 3 dialects */
2796d303 995 inbuflen = sizeof(*pneg_inbuf);
9764c02f
SF		 996 } else {
997 /* otherwise specific dialect was requested */
2796d303 998 pneg_inbuf->Dialects[0] =
9764c02f 999 cpu_to_le16(tcon->ses->server->vals->protocol_id);
2796d303 1000 pneg_inbuf->DialectCount = cpu_to_le16(1);
9764c02f 1001 /* structure is big enough for 3 dialects, sending only 1 */
2796d303
LL		 1002 inbuflen = sizeof(*pneg_inbuf) -
1003 sizeof(pneg_inbuf->Dialects[0]) * 2;
9764c02f 1004 }
ff1c038a
SF		 1005
1006 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1007 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
153322f7
SF		 1008 (char *)pneg_inbuf, inbuflen, CIFSMaxBufSize,
1009 (char **)&pneg_rsp, &rsplen);
969ae8e8
NJ		 1010 if (rc == -EOPNOTSUPP) {
1011 /*
1012 * Old Windows versions or Netapp SMB server can return
1013 * not supported error. Client should accept it.
1014 */
1015 cifs_dbg(VFS, "Server does not support validate negotiate\n");
1016 return 0;
1017 } else if (rc != 0) {
ff1c038a 1018 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
2796d303
LL		 1019 rc = -EIO;
1020 goto out_free_inbuf;
ff1c038a
SF		 1021 }
1022
2796d303
LL		 1023 rc = -EIO;
1024 if (rsplen != sizeof(*pneg_rsp)) {
7db0a6ef
SF		 1025 cifs_dbg(VFS, "invalid protocol negotiate response size: %d\n",
1026 rsplen);
1027
1028 /* relax check since Mac returns max bufsize allowed on ioctl */
2796d303
LL		 1029 if (rsplen > CIFSMaxBufSize || rsplen < sizeof(*pneg_rsp))
1030 goto out_free_rsp;
ff1c038a
SF		 1031 }
1032
1033 /* check validate negotiate info response matches what we got earlier */
9aca7e45 1034 if (pneg_rsp->Dialect != cpu_to_le16(tcon->ses->server->dialect))
ff1c038a
SF		 1035 goto vneg_out;
1036
1037 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
1038 goto vneg_out;
1039
1040 /* do not validate server guid because not saved at negprot time yet */
1041
1042 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
1043 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
1044 goto vneg_out;
1045
1046 /* validate negotiate successful */
2796d303 1047 rc = 0;
ff1c038a 1048 cifs_dbg(FYI, "validate negotiate info successful\n");
2796d303 1049 goto out_free_rsp;
ff1c038a
SF		 1050
1051vneg_out:
1052 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
2796d303 1053out_free_rsp:
fe83bebc 1054 kfree(pneg_rsp);
2796d303
LL		 1055out_free_inbuf:
1056 kfree(pneg_inbuf);
1057 return rc;
ff1c038a
SF		 1058}
1059
ef65aaed
SP		 1060enum securityEnum
1061smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
1062{
1063 switch (requested) {
1064 case Kerberos:
1065 case RawNTLMSSP:
1066 return requested;
1067 case NTLMv2:
1068 return RawNTLMSSP;
1069 case Unspecified:
1070 if (server->sec_ntlmssp &&
1071 (global_secflags & CIFSSEC_MAY_NTLMSSP))
1072 return RawNTLMSSP;
1073 if ((server->sec_kerberos || server->sec_mskerberos) &&
1074 (global_secflags & CIFSSEC_MAY_KRB5))
1075 return Kerberos;
1076 /* Fallthrough */
1077 default:
1078 return Unspecified;
1079 }
1080}
1081
3baf1a7b
SP		 1082struct SMB2_sess_data {
1083 unsigned int xid;
1084 struct cifs_ses *ses;
1085 struct nls_table *nls_cp;
1086 void (*func)(struct SMB2_sess_data *);
1087 int result;
1088 u64 previous_session;
1089
1090 /* we will send the SMB in three pieces:
1091 * a fixed length beginning part, an optional
1092 * SPNEGO blob (which can be zero length), and a
1093 * last part which will include the strings
1094 * and rest of bcc area. This allows us to avoid
1095 * a large buffer 17K allocation
1096 */
1097 int buf0_type;
1098 struct kvec iov[2];
1099};
1100
1101static int
1102SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
1103{
1104 int rc;
1105 struct cifs_ses *ses = sess_data->ses;
1106 struct smb2_sess_setup_req *req;
1107 struct TCP_Server_Info *server = ses->server;
88ea5cb7 1108 unsigned int total_len;
3baf1a7b 1109
88ea5cb7
RS		 1110 rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, (void **) &req,
1111 &total_len);
3baf1a7b
SP		 1112 if (rc)
1113 return rc;
1114
31473fc4 1115 /* First session, not a reauthenticate */
88ea5cb7 1116 req->sync_hdr.SessionId = 0;
3baf1a7b
SP		 1117
1118 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
1119 req->PreviousSessionId = sess_data->previous_session;
1120
1121 req->Flags = 0; /* MBZ */
d409014e
SF		 1122
1123 /* enough to enable echos and oplocks and one max size write */
1124 req->sync_hdr.CreditRequest = cpu_to_le16(130);
3baf1a7b
SP		 1125
1126 /* only one of SMB2 signing flags may be set in SMB2 request */
1127 if (server->sign)
1128 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
1129 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
1130 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
1131 else
1132 req->SecurityMode = 0;
1133
1134 req->Capabilities = 0;
1135 req->Channel = 0; /* MBZ */
1136
1137 sess_data->iov[0].iov_base = (char *)req;
88ea5cb7
RS		 1138 /* 1 for pad */
1139 sess_data->iov[0].iov_len = total_len - 1;
3baf1a7b
SP		 1140 /*
1141 * This variable will be used to clear the buffer
1142 * allocated above in case of any error in the calling function.
1143 */
1144 sess_data->buf0_type = CIFS_SMALL_BUFFER;
1145
1146 return 0;
1147}
1148
1149static void
1150SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
1151{
1152 free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
1153 sess_data->buf0_type = CIFS_NO_BUFFER;
1154}
1155
1156static int
1157SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
1158{
1159 int rc;
40eff45b 1160 struct smb_rqst rqst;
3baf1a7b 1161 struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
da502f7d 1162 struct kvec rsp_iov = { NULL, 0 };
3baf1a7b
SP		 1163
1164 /* Testing shows that buffer offset must be at location of Buffer[0] */
1165 req->SecurityBufferOffset =
88ea5cb7 1166 cpu_to_le16(sizeof(struct smb2_sess_setup_req) - 1 /* pad */);
3baf1a7b
SP		 1167 req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
1168
40eff45b
RS		 1169 memset(&rqst, 0, sizeof(struct smb_rqst));
1170 rqst.rq_iov = sess_data->iov;
1171 rqst.rq_nvec = 2;
3baf1a7b 1172
40eff45b
RS		 1173 /* BB add code to build os and lm fields */
1174 rc = cifs_send_recv(sess_data->xid, sess_data->ses,
1175 &rqst,
88ea5cb7
RS		 1176 &sess_data->buf0_type,
1177 CIFS_LOG_ERROR | CIFS_NEG_OP, &rsp_iov);
da502f7d
PS		 1178 cifs_small_buf_release(sess_data->iov[0].iov_base);
1179 memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
3baf1a7b
SP		 1180
1181 return rc;
1182}
1183
1184static int
1185SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
1186{
1187 int rc = 0;
1188 struct cifs_ses *ses = sess_data->ses;
1189
1190 mutex_lock(&ses->server->srv_mutex);
cabfb368 1191 if (ses->server->ops->generate_signingkey) {
3baf1a7b 1192 rc = ses->server->ops->generate_signingkey(ses);
3baf1a7b
SP		 1193 if (rc) {
1194 cifs_dbg(FYI,
1195 "SMB3 session key generation failed\n");
1196 mutex_unlock(&ses->server->srv_mutex);
cabfb368 1197 return rc;
3baf1a7b
SP		 1198 }
1199 }
1200 if (!ses->server->session_estab) {
1201 ses->server->sequence_number = 0x2;
1202 ses->server->session_estab = true;
1203 }
1204 mutex_unlock(&ses->server->srv_mutex);
1205
1206 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
1207 spin_lock(&GlobalMid_Lock);
1208 ses->status = CifsGood;
1209 ses->need_reconnect = false;
1210 spin_unlock(&GlobalMid_Lock);
3baf1a7b
SP		 1211 return rc;
1212}
1213
1214#ifdef CONFIG_CIFS_UPCALL
1215static void
1216SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1217{
1218 int rc;
1219 struct cifs_ses *ses = sess_data->ses;
1220 struct cifs_spnego_msg *msg;
1221 struct key *spnego_key = NULL;
1222 struct smb2_sess_setup_rsp *rsp = NULL;
1223
1224 rc = SMB2_sess_alloc_buffer(sess_data);
1225 if (rc)
1226 goto out;
1227
1228 spnego_key = cifs_get_spnego_key(ses);
1229 if (IS_ERR(spnego_key)) {
1230 rc = PTR_ERR(spnego_key);
1231 spnego_key = NULL;
1232 goto out;
1233 }
1234
1235 msg = spnego_key->payload.data[0];
1236 /*
1237 * check version field to make sure that cifs.upcall is
1238 * sending us a response in an expected form
1239 */
1240 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
1241 cifs_dbg(VFS,
1242 "bad cifs.upcall version. Expected %d got %d",
1243 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
1244 rc = -EKEYREJECTED;
1245 goto out_put_spnego_key;
1246 }
1247
1248 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
1249 GFP_KERNEL);
1250 if (!ses->auth_key.response) {
1251 cifs_dbg(VFS,
1252 "Kerberos can't allocate (%u bytes) memory",
1253 msg->sesskey_len);
1254 rc = -ENOMEM;
1255 goto out_put_spnego_key;
1256 }
1257 ses->auth_key.len = msg->sesskey_len;
1258
1259 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
1260 sess_data->iov[1].iov_len = msg->secblob_len;
1261
1262 rc = SMB2_sess_sendreceive(sess_data);
1263 if (rc)
1264 goto out_put_spnego_key;
1265
1266 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
49f466bd 1267 ses->Suid = rsp->sync_hdr.SessionId;
3baf1a7b
SP		 1268
1269 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
3baf1a7b
SP		 1270
1271 rc = SMB2_sess_establish_session(sess_data);
1272out_put_spnego_key:
1273 key_invalidate(spnego_key);
1274 key_put(spnego_key);
1275out:
1276 sess_data->result = rc;
1277 sess_data->func = NULL;
1278 SMB2_sess_free_buffer(sess_data);
1279}
1280#else
1281static void
1282SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1283{
1284 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
1285 sess_data->result = -EOPNOTSUPP;
1286 sess_data->func = NULL;
1287}
1288#endif
1289
166cea4d
SP		 1290static void
1291SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
1292
1293static void
1294SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
5478f9ba 1295{
166cea4d
SP		 1296 int rc;
1297 struct cifs_ses *ses = sess_data->ses;
5478f9ba 1298 struct smb2_sess_setup_rsp *rsp = NULL;
166cea4d 1299 char *ntlmssp_blob = NULL;
5478f9ba 1300 bool use_spnego = false; /* else use raw ntlmssp */
166cea4d 1301 u16 blob_length = 0;
d4e63bd6 1302
5478f9ba
PS		 1303 /*
1304 * If memory allocation is successful, caller of this function
1305 * frees it.
1306 */
1307 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
166cea4d
SP		 1308 if (!ses->ntlmssp) {
1309 rc = -ENOMEM;
1310 goto out_err;
1311 }
5c234aa5 1312 ses->ntlmssp->sesskey_per_smbsess = true;
5478f9ba 1313
166cea4d 1314 rc = SMB2_sess_alloc_buffer(sess_data);
5478f9ba 1315 if (rc)
166cea4d 1316 goto out_err;
5478f9ba 1317
166cea4d
SP		 1318 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
1319 GFP_KERNEL);
1320 if (ntlmssp_blob == NULL) {
1321 rc = -ENOMEM;
1322 goto out;
1323 }
c2afb814 1324
166cea4d
SP		 1325 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
1326 if (use_spnego) {
1327 /* BB eventually need to add this */
1328 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1329 rc = -EOPNOTSUPP;
1330 goto out;
1331 } else {
1332 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
1333 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
1334 }
1335 sess_data->iov[1].iov_base = ntlmssp_blob;
1336 sess_data->iov[1].iov_len = blob_length;
c2afb814 1337
166cea4d
SP		 1338 rc = SMB2_sess_sendreceive(sess_data);
1339 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
5478f9ba 1340
166cea4d
SP		 1341 /* If true, rc here is expected and not an error */
1342 if (sess_data->buf0_type != CIFS_NO_BUFFER &&
49f466bd 1343 rsp->sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
166cea4d 1344 rc = 0;
38d77c50 1345
166cea4d
SP		 1346 if (rc)
1347 goto out;
5478f9ba 1348
1fc6ad2f 1349 if (offsetof(struct smb2_sess_setup_rsp, Buffer) !=
166cea4d
SP		 1350 le16_to_cpu(rsp->SecurityBufferOffset)) {
1351 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
1352 le16_to_cpu(rsp->SecurityBufferOffset));
5478f9ba 1353 rc = -EIO;
166cea4d 1354 goto out;
5478f9ba 1355 }
166cea4d
SP		 1356 rc = decode_ntlmssp_challenge(rsp->Buffer,
1357 le16_to_cpu(rsp->SecurityBufferLength), ses);
1358 if (rc)
1359 goto out;
5478f9ba 1360
166cea4d 1361 cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
5478f9ba 1362
5478f9ba 1363
49f466bd 1364 ses->Suid = rsp->sync_hdr.SessionId;
166cea4d 1365 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
166cea4d
SP		 1366
1367out:
1368 kfree(ntlmssp_blob);
1369 SMB2_sess_free_buffer(sess_data);
1370 if (!rc) {
1371 sess_data->result = 0;
1372 sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
1373 return;
1374 }
1375out_err:
1376 kfree(ses->ntlmssp);
1377 ses->ntlmssp = NULL;
1378 sess_data->result = rc;
1379 sess_data->func = NULL;
1380}
5478f9ba 1381
166cea4d
SP		 1382static void
1383SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
1384{
1385 int rc;
1386 struct cifs_ses *ses = sess_data->ses;
1387 struct smb2_sess_setup_req *req;
1388 struct smb2_sess_setup_rsp *rsp = NULL;
1389 unsigned char *ntlmssp_blob = NULL;
1390 bool use_spnego = false; /* else use raw ntlmssp */
1391 u16 blob_length = 0;
5478f9ba 1392
166cea4d
SP		 1393 rc = SMB2_sess_alloc_buffer(sess_data);
1394 if (rc)
1395 goto out;
5478f9ba 1396
166cea4d 1397 req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
88ea5cb7 1398 req->sync_hdr.SessionId = ses->Suid;
166cea4d
SP		 1399
1400 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
1401 sess_data->nls_cp);
1402 if (rc) {
1403 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
1404 goto out;
5478f9ba
PS		 1405 }
1406
166cea4d
SP		 1407 if (use_spnego) {
1408 /* BB eventually need to add this */
1409 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1410 rc = -EOPNOTSUPP;
1411 goto out;
1412 }
1413 sess_data->iov[1].iov_base = ntlmssp_blob;
1414 sess_data->iov[1].iov_len = blob_length;
5478f9ba 1415
166cea4d
SP		 1416 rc = SMB2_sess_sendreceive(sess_data);
1417 if (rc)
1418 goto out;
1419
1420 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1421
49f466bd 1422 ses->Suid = rsp->sync_hdr.SessionId;
5478f9ba 1423 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
5478f9ba 1424
166cea4d
SP		 1425 rc = SMB2_sess_establish_session(sess_data);
1426out:
1427 kfree(ntlmssp_blob);
1428 SMB2_sess_free_buffer(sess_data);
1429 kfree(ses->ntlmssp);
1430 ses->ntlmssp = NULL;
1431 sess_data->result = rc;
1432 sess_data->func = NULL;
1433}
d4e63bd6 1434
166cea4d
SP		 1435static int
1436SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data)
1437{
ef65aaed
SP		 1438 int type;
1439
1440 type = smb2_select_sectype(ses->server, ses->sectype);
1441 cifs_dbg(FYI, "sess setup type %d\n", type);
1442 if (type == Unspecified) {
1443 cifs_dbg(VFS,
1444 "Unable to select appropriate authentication method!");
1445 return -EINVAL;
1446 }
d4e63bd6 1447
ef65aaed 1448 switch (type) {
166cea4d
SP		 1449 case Kerberos:
1450 sess_data->func = SMB2_auth_kerberos;
1451 break;
1452 case RawNTLMSSP:
1453 sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
1454 break;
1455 default:
ef65aaed 1456 cifs_dbg(VFS, "secType %d not supported!\n", type);
166cea4d 1457 return -EOPNOTSUPP;
d4e63bd6
SP		 1458 }
1459
166cea4d
SP		 1460 return 0;
1461}
1462
1463int
1464SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
1465 const struct nls_table *nls_cp)
1466{
1467 int rc = 0;
1468 struct TCP_Server_Info *server = ses->server;
1469 struct SMB2_sess_data *sess_data;
1470
1471 cifs_dbg(FYI, "Session Setup\n");
1472
1473 if (!server) {
1474 WARN(1, "%s: server is NULL!\n", __func__);
1475 return -EIO;
d4e63bd6 1476 }
d4e63bd6 1477
166cea4d
SP		 1478 sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
1479 if (!sess_data)
1480 return -ENOMEM;
1481
1482 rc = SMB2_select_sec(ses, sess_data);
1483 if (rc)
1484 goto out;
1485 sess_data->xid = xid;
1486 sess_data->ses = ses;
1487 sess_data->buf0_type = CIFS_NO_BUFFER;
1488 sess_data->nls_cp = (struct nls_table *) nls_cp;
b2adf22f 1489 sess_data->previous_session = ses->Suid;
166cea4d 1490
8bd68c6e
AA		 1491 /*
1492 * Initialize the session hash with the server one.
1493 */
1494 memcpy(ses->preauth_sha_hash, ses->server->preauth_sha_hash,
1495 SMB2_PREAUTH_HASH_SIZE);
8bd68c6e 1496
166cea4d
SP		 1497 while (sess_data->func)
1498 sess_data->func(sess_data);
1499
c721c389
SF		 1500 if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign))
1501 cifs_dbg(VFS, "signing requested but authenticated as guest\n");
3baf1a7b 1502 rc = sess_data->result;
166cea4d 1503out:
3baf1a7b 1504 kfree(sess_data);
5478f9ba
PS		 1505 return rc;
1506}
1507
1508int
1509SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
1510{
40eff45b 1511 struct smb_rqst rqst;
5478f9ba
PS		 1512 struct smb2_logoff_req *req; /* response is also trivial struct */
1513 int rc = 0;
1514 struct TCP_Server_Info *server;
7fb8986e 1515 int flags = 0;
45305eda
RS		 1516 unsigned int total_len;
1517 struct kvec iov[1];
1518 struct kvec rsp_iov;
1519 int resp_buf_type;
5478f9ba 1520
f96637be 1521 cifs_dbg(FYI, "disconnect session %p\n", ses);
5478f9ba
PS		 1522
1523 if (ses && (ses->server))
1524 server = ses->server;
1525 else
1526 return -EIO;
1527
eb4c7df6
SP		 1528 /* no need to send SMB logoff if uid already closed due to reconnect */
1529 if (ses->need_reconnect)
1530 goto smb2_session_already_dead;
1531
45305eda 1532 rc = smb2_plain_req_init(SMB2_LOGOFF, NULL, (void **) &req, &total_len);
5478f9ba
PS		 1533 if (rc)
1534 return rc;
1535
1536 /* since no tcon, smb2_init can not do this, so do here */
45305eda 1537 req->sync_hdr.SessionId = ses->Suid;
7fb8986e
PS		 1538
1539 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
1540 flags |= CIFS_TRANSFORM_REQ;
1541 else if (server->sign)
45305eda
RS		 1542 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1543
1544 flags |= CIFS_NO_RESP;
1545
1546 iov[0].iov_base = (char *)req;
1547 iov[0].iov_len = total_len;
5478f9ba 1548
40eff45b
RS		 1549 memset(&rqst, 0, sizeof(struct smb_rqst));
1550 rqst.rq_iov = iov;
1551 rqst.rq_nvec = 1;
1552
1553 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
da502f7d 1554 cifs_small_buf_release(req);
5478f9ba
PS		 1555 /*
1556 * No tcon so can't do
1557 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1558 */
eb4c7df6
SP		 1559
1560smb2_session_already_dead:
5478f9ba
PS		 1561 return rc;
1562}
faaf946a
PS		 1563
1564static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
1565{
d60622eb 1566 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
faaf946a
PS		 1567}
1568
1569#define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1570
de9f68df
SF		 1571/* These are similar values to what Windows uses */
1572static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
1573{
1574 tcon->max_chunks = 256;
1575 tcon->max_bytes_chunk = 1048576;
1576 tcon->max_bytes_copy = 16777216;
1577}
1578
faaf946a
PS		 1579int
1580SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
1581 struct cifs_tcon *tcon, const struct nls_table *cp)
1582{
40eff45b 1583 struct smb_rqst rqst;
faaf946a
PS		 1584 struct smb2_tree_connect_req *req;
1585 struct smb2_tree_connect_rsp *rsp = NULL;
1586 struct kvec iov[2];
db3b5474 1587 struct kvec rsp_iov = { NULL, 0 };
faaf946a
PS		 1588 int rc = 0;
1589 int resp_buftype;
1590 int unc_path_len;
faaf946a 1591 __le16 *unc_path = NULL;
7fb8986e 1592 int flags = 0;
661bb943 1593 unsigned int total_len;
faaf946a 1594
f96637be 1595 cifs_dbg(FYI, "TCON\n");
faaf946a 1596
68a6afa7 1597 if (!(ses->server) || !tree)
faaf946a
PS		 1598 return -EIO;
1599
faaf946a
PS		 1600 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
1601 if (unc_path == NULL)
1602 return -ENOMEM;
1603
1604 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
1605 unc_path_len *= 2;
1606 if (unc_path_len < 2) {
1607 kfree(unc_path);
1608 return -EINVAL;
1609 }
1610
806a28ef 1611 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
b327a717 1612 tcon->tid = 0;
fae8044c 1613 atomic_set(&tcon->num_remote_opens, 0);
661bb943
RS		 1614 rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, (void **) &req,
1615 &total_len);
faaf946a
PS		 1616 if (rc) {
1617 kfree(unc_path);
1618 return rc;
1619 }
1620
5a77e75f 1621 if (smb3_encryption_required(tcon))
ae6f8dd4 1622 flags |= CIFS_TRANSFORM_REQ;
faaf946a
PS		 1623
1624 iov[0].iov_base = (char *)req;
661bb943
RS		 1625 /* 1 for pad */
1626 iov[0].iov_len = total_len - 1;
faaf946a
PS		 1627
1628 /* Testing shows that buffer offset must be at location of Buffer[0] */
1629 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
661bb943 1630 - 1 /* pad */);
faaf946a
PS		 1631 req->PathLength = cpu_to_le16(unc_path_len - 2);
1632 iov[1].iov_base = unc_path;
1633 iov[1].iov_len = unc_path_len;
1634
e71ab2aa
RS		 1635 /*
1636 * 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1
1637 * unless it is guest or anonymous user. See MS-SMB2 3.2.5.3.1
8c11a607 1638 * (Samba servers don't always set the flag so also check if null user)
e71ab2aa 1639 */
6188f28b 1640 if ((ses->server->dialect == SMB311_PROT_ID) &&
e71ab2aa 1641 !smb3_encryption_required(tcon) &&
8c11a607
SF		 1642 !(ses->session_flags &
1643 (SMB2_SESSION_FLAG_IS_GUEST|SMB2_SESSION_FLAG_IS_NULL)) &&
1644 ((ses->user_name != NULL) || (ses->sectype == Kerberos)))
6188f28b
SF		 1645 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1646
40eff45b
RS		 1647 memset(&rqst, 0, sizeof(struct smb_rqst));
1648 rqst.rq_iov = iov;
1649 rqst.rq_nvec = 2;
1650
4fe75c4e
SF		 1651 /* Need 64 for max size write so ask for more in case not there yet */
1652 req->sync_hdr.CreditRequest = cpu_to_le16(64);
1653
40eff45b 1654 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1655 cifs_small_buf_release(req);
1656 rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
f8af49dd 1657 trace_smb3_tcon(xid, tcon->tid, ses->Suid, tree, rc);
faaf946a
PS		 1658 if (rc != 0) {
1659 if (tcon) {
1660 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
1661 tcon->need_reconnect = true;
1662 }
1663 goto tcon_error_exit;
1664 }
1665
cd123007
CJ		 1666 switch (rsp->ShareType) {
1667 case SMB2_SHARE_TYPE_DISK:
f96637be 1668 cifs_dbg(FYI, "connection to disk share\n");
cd123007
CJ		 1669 break;
1670 case SMB2_SHARE_TYPE_PIPE:
b327a717 1671 tcon->pipe = true;
f96637be 1672 cifs_dbg(FYI, "connection to pipe share\n");
cd123007
CJ		 1673 break;
1674 case SMB2_SHARE_TYPE_PRINT:
b327a717 1675 tcon->print = true;
f96637be 1676 cifs_dbg(FYI, "connection to printer\n");
cd123007
CJ		 1677 break;
1678 default:
f96637be 1679 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
faaf946a
PS		 1680 rc = -EOPNOTSUPP;
1681 goto tcon_error_exit;
1682 }
1683
1684 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
769ee6a4 1685 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
faaf946a
PS		 1686 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1687 tcon->tidStatus = CifsGood;
1688 tcon->need_reconnect = false;
49f466bd 1689 tcon->tid = rsp->sync_hdr.TreeId;
46b51d08 1690 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
faaf946a
PS		 1691
1692 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1693 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
f96637be 1694 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
ae6f8dd4
PS		 1695
1696 if (tcon->seal &&
1697 !(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
1698 cifs_dbg(VFS, "Encryption is requested but not supported\n");
1699
de9f68df 1700 init_copy_chunk_defaults(tcon);
ff1c038a
SF		 1701 if (tcon->ses->server->ops->validate_negotiate)
1702 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
faaf946a 1703tcon_exit:
f8af49dd 1704
faaf946a
PS		 1705 free_rsp_buf(resp_buftype, rsp);
1706 kfree(unc_path);
1707 return rc;
1708
1709tcon_error_exit:
49f466bd 1710 if (rsp && rsp->sync_hdr.Status == STATUS_BAD_NETWORK_NAME) {
f96637be 1711 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
faaf946a
PS		 1712 }
1713 goto tcon_exit;
1714}
1715
1716int
1717SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1718{
40eff45b 1719 struct smb_rqst rqst;
faaf946a
PS		 1720 struct smb2_tree_disconnect_req *req; /* response is trivial */
1721 int rc = 0;
faaf946a 1722 struct cifs_ses *ses = tcon->ses;
7fb8986e 1723 int flags = 0;
4eecf4cf
RS		 1724 unsigned int total_len;
1725 struct kvec iov[1];
1726 struct kvec rsp_iov;
1727 int resp_buf_type;
faaf946a 1728
f96637be 1729 cifs_dbg(FYI, "Tree Disconnect\n");
faaf946a 1730
68a6afa7 1731 if (!ses || !(ses->server))
faaf946a
PS		 1732 return -EIO;
1733
1734 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1735 return 0;
1736
4eecf4cf
RS		 1737 rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req,
1738 &total_len);
faaf946a
PS		 1739 if (rc)
1740 return rc;
1741
5a77e75f 1742 if (smb3_encryption_required(tcon))
7fb8986e
PS		 1743 flags |= CIFS_TRANSFORM_REQ;
1744
4eecf4cf
RS		 1745 flags |= CIFS_NO_RESP;
1746
1747 iov[0].iov_base = (char *)req;
1748 iov[0].iov_len = total_len;
1749
40eff45b
RS		 1750 memset(&rqst, 0, sizeof(struct smb_rqst));
1751 rqst.rq_iov = iov;
1752 rqst.rq_nvec = 1;
1753
1754 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
da502f7d 1755 cifs_small_buf_release(req);
faaf946a
PS		 1756 if (rc)
1757 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1758
1759 return rc;
1760}
2503a0db 1761
b8c32dbb 1762
63eb3def
PS		 1763static struct create_durable *
1764create_durable_buf(void)
1765{
1766 struct create_durable *buf;
1767
1768 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1769 if (!buf)
1770 return NULL;
1771
1772 buf->ccontext.DataOffset = cpu_to_le16(offsetof
9cbc0b73 1773 (struct create_durable, Data));
63eb3def
PS		 1774 buf->ccontext.DataLength = cpu_to_le32(16);
1775 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1776 (struct create_durable, Name));
1777 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 1778 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
63eb3def
PS		 1779 buf->Name[0] = 'D';
1780 buf->Name[1] = 'H';
1781 buf->Name[2] = 'n';
1782 buf->Name[3] = 'Q';
1783 return buf;
1784}
1785
9cbc0b73
PS		 1786static struct create_durable *
1787create_reconnect_durable_buf(struct cifs_fid *fid)
1788{
1789 struct create_durable *buf;
1790
1791 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1792 if (!buf)
1793 return NULL;
1794
1795 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1796 (struct create_durable, Data));
1797 buf->ccontext.DataLength = cpu_to_le32(16);
1798 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1799 (struct create_durable, Name));
1800 buf->ccontext.NameLength = cpu_to_le16(4);
1801 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1802 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
12197a7f 1803 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
9cbc0b73
PS		 1804 buf->Name[0] = 'D';
1805 buf->Name[1] = 'H';
1806 buf->Name[2] = 'n';
1807 buf->Name[3] = 'C';
1808 return buf;
1809}
1810
b0f6df73
RS		 1811__u8
1812smb2_parse_lease_state(struct TCP_Server_Info *server,
1813 struct smb2_create_rsp *rsp,
1814 unsigned int *epoch, char *lease_key)
b8c32dbb
PS		 1815{
1816 char *data_offset;
b5c7cde3 1817 struct create_context *cc;
deb7deff
JM		 1818 unsigned int next;
1819 unsigned int remaining;
fd554396 1820 char *name;
b8c32dbb 1821
1fc6ad2f 1822 data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset);
deb7deff 1823 remaining = le32_to_cpu(rsp->CreateContextsLength);
b5c7cde3 1824 cc = (struct create_context *)data_offset;
deb7deff 1825 while (remaining >= sizeof(struct create_context)) {
b5c7cde3 1826 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
deb7deff
JM		 1827 if (le16_to_cpu(cc->NameLength) == 4 &&
1828 strncmp(name, "RqLs", 4) == 0)
96164ab2
RS		 1829 return server->ops->parse_lease_buf(cc, epoch,
1830 lease_key);
deb7deff
JM		 1831
1832 next = le32_to_cpu(cc->Next);
1833 if (!next)
1834 break;
1835 remaining -= next;
1836 cc = (struct create_context *)((char *)cc + next);
1837 }
b8c32dbb 1838
b5c7cde3 1839 return 0;
b8c32dbb
PS		 1840}
1841
d22cbfec 1842static int
a41a28bd 1843add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
729c0c9d 1844 unsigned int *num_iovec, u8 *lease_key, __u8 *oplock)
d22cbfec
PS		 1845{
1846 struct smb2_create_req *req = iov[0].iov_base;
1847 unsigned int num = *num_iovec;
1848
729c0c9d 1849 iov[num].iov_base = server->ops->create_lease_buf(lease_key, *oplock);
d22cbfec
PS		 1850 if (iov[num].iov_base == NULL)
1851 return -ENOMEM;
a41a28bd 1852 iov[num].iov_len = server->vals->create_lease_size;
d22cbfec
PS		 1853 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1854 if (!req->CreateContextsOffset)
1855 req->CreateContextsOffset = cpu_to_le32(
4f33bc35 1856 sizeof(struct smb2_create_req) +
d22cbfec 1857 iov[num - 1].iov_len);
a41a28bd
PS		 1858 le32_add_cpu(&req->CreateContextsLength,
1859 server->vals->create_lease_size);
d22cbfec
PS		 1860 *num_iovec = num + 1;
1861 return 0;
1862}
1863
b56eae4d 1864static struct create_durable_v2 *
ca567eb2 1865create_durable_v2_buf(struct cifs_open_parms *oparms)
b56eae4d 1866{
ca567eb2 1867 struct cifs_fid *pfid = oparms->fid;
b56eae4d
SF		 1868 struct create_durable_v2 *buf;
1869
1870 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
1871 if (!buf)
1872 return NULL;
1873
1874 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1875 (struct create_durable_v2, dcontext));
1876 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
1877 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1878 (struct create_durable_v2, Name));
1879 buf->ccontext.NameLength = cpu_to_le16(4);
1880
ca567eb2
SF		 1881 /*
1882 * NB: Handle timeout defaults to 0, which allows server to choose
1883 * (most servers default to 120 seconds) and most clients default to 0.
1884 * This can be overridden at mount ("handletimeout=") if the user wants
1885 * a different persistent (or resilient) handle timeout for all opens
1886 * opens on a particular SMB3 mount.
1887 */
1888 buf->dcontext.Timeout = cpu_to_le32(oparms->tcon->handle_timeout);
b56eae4d 1889 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
fa70b87c 1890 generate_random_uuid(buf->dcontext.CreateGuid);
b56eae4d
SF		 1891 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
1892
1893 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1894 buf->Name[0] = 'D';
1895 buf->Name[1] = 'H';
1896 buf->Name[2] = '2';
1897 buf->Name[3] = 'Q';
1898 return buf;
1899}
1900
1901static struct create_durable_handle_reconnect_v2 *
1902create_reconnect_durable_v2_buf(struct cifs_fid *fid)
1903{
1904 struct create_durable_handle_reconnect_v2 *buf;
1905
1906 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
1907 GFP_KERNEL);
1908 if (!buf)
1909 return NULL;
1910
1911 buf->ccontext.DataOffset =
1912 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1913 dcontext));
1914 buf->ccontext.DataLength =
1915 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
1916 buf->ccontext.NameOffset =
1917 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1918 Name));
1919 buf->ccontext.NameLength = cpu_to_le16(4);
1920
1921 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
1922 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
1923 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1924 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
1925
1926 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1927 buf->Name[0] = 'D';
1928 buf->Name[1] = 'H';
1929 buf->Name[2] = '2';
1930 buf->Name[3] = 'C';
1931 return buf;
1932}
1933
63eb3def 1934static int
b56eae4d
SF		 1935add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
1936 struct cifs_open_parms *oparms)
1937{
1938 struct smb2_create_req *req = iov[0].iov_base;
1939 unsigned int num = *num_iovec;
1940
ca567eb2 1941 iov[num].iov_base = create_durable_v2_buf(oparms);
b56eae4d
SF		 1942 if (iov[num].iov_base == NULL)
1943 return -ENOMEM;
1944 iov[num].iov_len = sizeof(struct create_durable_v2);
1945 if (!req->CreateContextsOffset)
1946 req->CreateContextsOffset =
4f33bc35 1947 cpu_to_le32(sizeof(struct smb2_create_req) +
b56eae4d
SF		 1948 iov[1].iov_len);
1949 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
b56eae4d
SF		 1950 *num_iovec = num + 1;
1951 return 0;
1952}
1953
1954static int
1955add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
9cbc0b73 1956 struct cifs_open_parms *oparms)
63eb3def
PS		 1957{
1958 struct smb2_create_req *req = iov[0].iov_base;
1959 unsigned int num = *num_iovec;
1960
b56eae4d
SF		 1961 /* indicate that we don't need to relock the file */
1962 oparms->reconnect = false;
1963
1964 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
1965 if (iov[num].iov_base == NULL)
1966 return -ENOMEM;
1967 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
1968 if (!req->CreateContextsOffset)
1969 req->CreateContextsOffset =
4f33bc35 1970 cpu_to_le32(sizeof(struct smb2_create_req) +
b56eae4d
SF		 1971 iov[1].iov_len);
1972 le32_add_cpu(&req->CreateContextsLength,
1973 sizeof(struct create_durable_handle_reconnect_v2));
b56eae4d
SF		 1974 *num_iovec = num + 1;
1975 return 0;
1976}
1977
1978static int
1979add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1980 struct cifs_open_parms *oparms, bool use_persistent)
1981{
1982 struct smb2_create_req *req = iov[0].iov_base;
1983 unsigned int num = *num_iovec;
1984
1985 if (use_persistent) {
1986 if (oparms->reconnect)
1987 return add_durable_reconnect_v2_context(iov, num_iovec,
1988 oparms);
1989 else
1990 return add_durable_v2_context(iov, num_iovec, oparms);
1991 }
1992
9cbc0b73
PS		 1993 if (oparms->reconnect) {
1994 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1995 /* indicate that we don't need to relock the file */
1996 oparms->reconnect = false;
1997 } else
1998 iov[num].iov_base = create_durable_buf();
63eb3def
PS		 1999 if (iov[num].iov_base == NULL)
2000 return -ENOMEM;
2001 iov[num].iov_len = sizeof(struct create_durable);
2002 if (!req->CreateContextsOffset)
2003 req->CreateContextsOffset =
4f33bc35 2004 cpu_to_le32(sizeof(struct smb2_create_req) +
63eb3def 2005 iov[1].iov_len);
31f92e9a 2006 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
63eb3def
PS		 2007 *num_iovec = num + 1;
2008 return 0;
2009}
2010
cdeaf9d0
SF		 2011/* See MS-SMB2 2.2.13.2.7 */
2012static struct crt_twarp_ctxt *
2013create_twarp_buf(__u64 timewarp)
2014{
2015 struct crt_twarp_ctxt *buf;
2016
2017 buf = kzalloc(sizeof(struct crt_twarp_ctxt), GFP_KERNEL);
2018 if (!buf)
2019 return NULL;
2020
2021 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2022 (struct crt_twarp_ctxt, Timestamp));
2023 buf->ccontext.DataLength = cpu_to_le32(8);
2024 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2025 (struct crt_twarp_ctxt, Name));
2026 buf->ccontext.NameLength = cpu_to_le16(4);
2027 /* SMB2_CREATE_TIMEWARP_TOKEN is "TWrp" */
2028 buf->Name[0] = 'T';
2029 buf->Name[1] = 'W';
2030 buf->Name[2] = 'r';
2031 buf->Name[3] = 'p';
2032 buf->Timestamp = cpu_to_le64(timewarp);
2033 return buf;
2034}
2035
2036/* See MS-SMB2 2.2.13.2.7 */
2037static int
2038add_twarp_context(struct kvec *iov, unsigned int *num_iovec, __u64 timewarp)
2039{
2040 struct smb2_create_req *req = iov[0].iov_base;
2041 unsigned int num = *num_iovec;
2042
2043 iov[num].iov_base = create_twarp_buf(timewarp);
2044 if (iov[num].iov_base == NULL)
2045 return -ENOMEM;
2046 iov[num].iov_len = sizeof(struct crt_twarp_ctxt);
2047 if (!req->CreateContextsOffset)
2048 req->CreateContextsOffset = cpu_to_le32(
2049 sizeof(struct smb2_create_req) +
2050 iov[num - 1].iov_len);
2051 le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_twarp_ctxt));
2052 *num_iovec = num + 1;
2053 return 0;
2054}
2055
f0712928
AA		 2056static int
2057alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
2058 const char *treename, const __le16 *path)
2059{
2060 int treename_len, path_len;
2061 struct nls_table *cp;
2062 const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
2063
2064 /*
2065 * skip leading "\\"
2066 */
2067 treename_len = strlen(treename);
2068 if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\'))
2069 return -EINVAL;
2070
2071 treename += 2;
2072 treename_len -= 2;
2073
2074 path_len = UniStrnlen((wchar_t *)path, PATH_MAX);
2075
2076 /*
2077 * make room for one path separator between the treename and
2078 * path
2079 */
2080 *out_len = treename_len + 1 + path_len;
2081
2082 /*
2083 * final path needs to be null-terminated UTF16 with a
2084 * size aligned to 8
2085 */
2086
2087 *out_size = roundup((*out_len+1)*2, 8);
2088 *out_path = kzalloc(*out_size, GFP_KERNEL);
2089 if (!*out_path)
2090 return -ENOMEM;
2091
2092 cp = load_nls_default();
2093 cifs_strtoUTF16(*out_path, treename, treename_len, cp);
2094 UniStrcat(*out_path, sep);
2095 UniStrcat(*out_path, path);
2096 unload_nls(cp);
2097
2098 return 0;
2099}
2100
bea851b8
SF		 2101int smb311_posix_mkdir(const unsigned int xid, struct inode *inode,
2102 umode_t mode, struct cifs_tcon *tcon,
2103 const char *full_path,
2104 struct cifs_sb_info *cifs_sb)
2105{
2106 struct smb_rqst rqst;
2107 struct smb2_create_req *req;
256b4c3f 2108 struct smb2_create_rsp *rsp = NULL;
bea851b8
SF		 2109 struct cifs_ses *ses = tcon->ses;
2110 struct kvec iov[3]; /* make sure at least one for each open context */
2111 struct kvec rsp_iov = {NULL, 0};
2112 int resp_buftype;
2113 int uni_path_len;
2114 __le16 *copy_path = NULL;
2115 int copy_size;
2116 int rc = 0;
2117 unsigned int n_iov = 2;
2118 __u32 file_attributes = 0;
2119 char *pc_buf = NULL;
2120 int flags = 0;
2121 unsigned int total_len;
256b4c3f 2122 __le16 *utf16_path = NULL;
bea851b8
SF		 2123
2124 cifs_dbg(FYI, "mkdir\n");
2125
256b4c3f
AA		 2126 /* resource #1: path allocation */
2127 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2128 if (!utf16_path)
2129 return -ENOMEM;
2130
29cbfa1b 2131 if (!ses || !(ses->server)) {
256b4c3f
AA		 2132 rc = -EIO;
2133 goto err_free_path;
2134 }
bea851b8 2135
256b4c3f 2136 /* resource #2: request */
bea851b8 2137 rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
bea851b8 2138 if (rc)
256b4c3f
AA		 2139 goto err_free_path;
2140
bea851b8
SF		 2141
2142 if (smb3_encryption_required(tcon))
2143 flags |= CIFS_TRANSFORM_REQ;
2144
bea851b8
SF		 2145 req->ImpersonationLevel = IL_IMPERSONATION;
2146 req->DesiredAccess = cpu_to_le32(FILE_WRITE_ATTRIBUTES);
2147 /* File attributes ignored on open (used in create though) */
2148 req->FileAttributes = cpu_to_le32(file_attributes);
2149 req->ShareAccess = FILE_SHARE_ALL_LE;
2150 req->CreateDisposition = cpu_to_le32(FILE_CREATE);
2151 req->CreateOptions = cpu_to_le32(CREATE_NOT_FILE);
2152
2153 iov[0].iov_base = (char *)req;
2154 /* -1 since last byte is buf[0] which is sent below (path) */
2155 iov[0].iov_len = total_len - 1;
2156
2157 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
2158
2159 /* [MS-SMB2] 2.2.13 NameOffset:
2160 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2161 * the SMB2 header, the file name includes a prefix that will
2162 * be processed during DFS name normalization as specified in
2163 * section 3.3.5.9. Otherwise, the file name is relative to
2164 * the share that is identified by the TreeId in the SMB2
2165 * header.
2166 */
2167 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
2168 int name_len;
2169
2170 req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
2171 rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
2172 &name_len,
256b4c3f
AA		 2173 tcon->treeName, utf16_path);
2174 if (rc)
2175 goto err_free_req;
2176
bea851b8
SF		 2177 req->NameLength = cpu_to_le16(name_len * 2);
2178 uni_path_len = copy_size;
256b4c3f
AA		 2179 /* free before overwriting resource */
2180 kfree(utf16_path);
2181 utf16_path = copy_path;
bea851b8 2182 } else {
256b4c3f 2183 uni_path_len = (2 * UniStrnlen((wchar_t *)utf16_path, PATH_MAX)) + 2;
bea851b8
SF		 2184 /* MUST set path len (NameLength) to 0 opening root of share */
2185 req->NameLength = cpu_to_le16(uni_path_len - 2);
2186 if (uni_path_len % 8 != 0) {
2187 copy_size = roundup(uni_path_len, 8);
2188 copy_path = kzalloc(copy_size, GFP_KERNEL);
2189 if (!copy_path) {
256b4c3f
AA		 2190 rc = -ENOMEM;
2191 goto err_free_req;
bea851b8 2192 }
256b4c3f 2193 memcpy((char *)copy_path, (const char *)utf16_path,
bea851b8
SF		 2194 uni_path_len);
2195 uni_path_len = copy_size;
256b4c3f
AA		 2196 /* free before overwriting resource */
2197 kfree(utf16_path);
2198 utf16_path = copy_path;
bea851b8
SF		 2199 }
2200 }
2201
2202 iov[1].iov_len = uni_path_len;
256b4c3f 2203 iov[1].iov_base = utf16_path;
bea851b8
SF		 2204 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2205
2206 if (tcon->posix_extensions) {
256b4c3f 2207 /* resource #3: posix buf */
bea851b8 2208 rc = add_posix_context(iov, &n_iov, mode);
256b4c3f
AA		 2209 if (rc)
2210 goto err_free_req;
bea851b8
SF		 2211 pc_buf = iov[n_iov-1].iov_base;
2212 }
2213
2214
2215 memset(&rqst, 0, sizeof(struct smb_rqst));
2216 rqst.rq_iov = iov;
2217 rqst.rq_nvec = n_iov;
2218
efe2e9f3
SF		 2219 trace_smb3_posix_mkdir_enter(xid, tcon->tid, ses->Suid, CREATE_NOT_FILE,
2220 FILE_WRITE_ATTRIBUTES);
256b4c3f
AA		 2221 /* resource #4: response buffer */
2222 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
2223 if (rc) {
bea851b8
SF		 2224 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
2225 trace_smb3_posix_mkdir_err(xid, tcon->tid, ses->Suid,
256b4c3f
AA		 2226 CREATE_NOT_FILE,
2227 FILE_WRITE_ATTRIBUTES, rc);
2228 goto err_free_rsp_buf;
2229 }
2230
2231 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2232 trace_smb3_posix_mkdir_done(xid, rsp->PersistentFileId, tcon->tid,
2233 ses->Suid, CREATE_NOT_FILE,
2234 FILE_WRITE_ATTRIBUTES);
bea851b8
SF		 2235
2236 SMB2_close(xid, tcon, rsp->PersistentFileId, rsp->VolatileFileId);
2237
2238 /* Eventually save off posix specific response info and timestaps */
2239
256b4c3f 2240err_free_rsp_buf:
bea851b8 2241 free_rsp_buf(resp_buftype, rsp);
256b4c3f
AA		 2242 kfree(pc_buf);
2243err_free_req:
2244 cifs_small_buf_release(req);
2245err_free_path:
2246 kfree(utf16_path);
bea851b8 2247 return rc;
bea851b8 2248}
bea851b8 2249
2503a0db 2250int
1eb9fb52
RS		 2251SMB2_open_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, __u8 *oplock,
2252 struct cifs_open_parms *oparms, __le16 *path)
2503a0db 2253{
1eb9fb52 2254 struct TCP_Server_Info *server = tcon->ses->server;
2503a0db 2255 struct smb2_create_req *req;
da502f7d 2256 unsigned int n_iov = 2;
ca81983f 2257 __u32 file_attributes = 0;
1eb9fb52
RS		 2258 int copy_size;
2259 int uni_path_len;
4f33bc35 2260 unsigned int total_len;
1eb9fb52
RS		 2261 struct kvec *iov = rqst->rq_iov;
2262 __le16 *copy_path;
2263 int rc;
2503a0db 2264
4f33bc35 2265 rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
2503a0db
PS		 2266 if (rc)
2267 return rc;
2268
1eb9fb52
RS		 2269 iov[0].iov_base = (char *)req;
2270 /* -1 since last byte is buf[0] which is sent below (path) */
2271 iov[0].iov_len = total_len - 1;
7fb8986e 2272
064f6047 2273 if (oparms->create_options & CREATE_OPTION_READONLY)
ca81983f 2274 file_attributes |= ATTR_READONLY;
db8b631d
SF		 2275 if (oparms->create_options & CREATE_OPTION_SPECIAL)
2276 file_attributes |= ATTR_SYSTEM;
ca81983f 2277
2503a0db 2278 req->ImpersonationLevel = IL_IMPERSONATION;
064f6047 2279 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
2503a0db
PS		 2280 /* File attributes ignored on open (used in create though) */
2281 req->FileAttributes = cpu_to_le32(file_attributes);
2282 req->ShareAccess = FILE_SHARE_ALL_LE;
064f6047
PS		 2283 req->CreateDisposition = cpu_to_le32(oparms->disposition);
2284 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
4f33bc35 2285 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
f0712928
AA		 2286
2287 /* [MS-SMB2] 2.2.13 NameOffset:
2288 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2289 * the SMB2 header, the file name includes a prefix that will
2290 * be processed during DFS name normalization as specified in
2291 * section 3.3.5.9. Otherwise, the file name is relative to
2292 * the share that is identified by the TreeId in the SMB2
2293 * header.
2294 */
2295 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
2296 int name_len;
2297
4f33bc35 2298 req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
f0712928
AA		 2299 rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
2300 &name_len,
2301 tcon->treeName, path);
1eb9fb52 2302 if (rc)
f0712928
AA		 2303 return rc;
2304 req->NameLength = cpu_to_le16(name_len * 2);
59aa3718
PS		 2305 uni_path_len = copy_size;
2306 path = copy_path;
f0712928
AA		 2307 } else {
2308 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
2309 /* MUST set path len (NameLength) to 0 opening root of share */
2310 req->NameLength = cpu_to_le16(uni_path_len - 2);
1eb9fb52
RS		 2311 copy_size = uni_path_len;
2312 if (copy_size % 8 != 0)
2313 copy_size = roundup(copy_size, 8);
2314 copy_path = kzalloc(copy_size, GFP_KERNEL);
2315 if (!copy_path)
2316 return -ENOMEM;
2317 memcpy((char *)copy_path, (const char *)path,
2318 uni_path_len);
2319 uni_path_len = copy_size;
2320 path = copy_path;
2503a0db
PS		 2321 }
2322
59aa3718
PS		 2323 iov[1].iov_len = uni_path_len;
2324 iov[1].iov_base = path;
59aa3718 2325
b8c32dbb
PS		 2326 if (!server->oplocks)
2327 *oplock = SMB2_OPLOCK_LEVEL_NONE;
2328
a41a28bd 2329 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
b8c32dbb
PS		 2330 *oplock == SMB2_OPLOCK_LEVEL_NONE)
2331 req->RequestedOplockLevel = *oplock;
f8015683
SF		 2332 else if (!(server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING) &&
2333 (oparms->create_options & CREATE_NOT_FILE))
2334 req->RequestedOplockLevel = *oplock; /* no srv lease support */
b8c32dbb 2335 else {
729c0c9d
SB		 2336 rc = add_lease_context(server, iov, &n_iov,
2337 oparms->fid->lease_key, oplock);
1eb9fb52 2338 if (rc)
d22cbfec 2339 return rc;
b8c32dbb
PS		 2340 }
2341
63eb3def
PS		 2342 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
2343 /* need to set Next field of lease context if we request it */
a41a28bd 2344 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
63eb3def 2345 struct create_context *ccontext =
da502f7d 2346 (struct create_context *)iov[n_iov-1].iov_base;
1c46943f 2347 ccontext->Next =
a41a28bd 2348 cpu_to_le32(server->vals->create_lease_size);
63eb3def 2349 }
b56eae4d 2350
da502f7d 2351 rc = add_durable_context(iov, &n_iov, oparms,
b56eae4d 2352 tcon->use_persistent);
1eb9fb52 2353 if (rc)
63eb3def 2354 return rc;
63eb3def
PS		 2355 }
2356
ce558b0e
SF		 2357 if (tcon->posix_extensions) {
2358 if (n_iov > 2) {
2359 struct create_context *ccontext =
2360 (struct create_context *)iov[n_iov-1].iov_base;
2361 ccontext->Next =
2362 cpu_to_le32(iov[n_iov-1].iov_len);
2363 }
2364
2365 rc = add_posix_context(iov, &n_iov, oparms->mode);
1eb9fb52 2366 if (rc)
ce558b0e 2367 return rc;
ce558b0e 2368 }
ce558b0e 2369
cdeaf9d0
SF		 2370 if (tcon->snapshot_time) {
2371 cifs_dbg(FYI, "adding snapshot context\n");
2372 if (n_iov > 2) {
2373 struct create_context *ccontext =
2374 (struct create_context *)iov[n_iov-1].iov_base;
2375 ccontext->Next =
2376 cpu_to_le32(iov[n_iov-1].iov_len);
2377 }
2378
2379 rc = add_twarp_context(iov, &n_iov, tcon->snapshot_time);
2380 if (rc)
2381 return rc;
2382 }
2383
2384
1eb9fb52
RS		 2385 rqst->rq_nvec = n_iov;
2386 return 0;
2387}
2388
2389/* rq_iov[0] is the request and is released by cifs_small_buf_release().
2390 * All other vectors are freed by kfree().
2391 */
2392void
2393SMB2_open_free(struct smb_rqst *rqst)
2394{
2395 int i;
2396
32a1fb36
RS		 2397 if (rqst && rqst->rq_iov) {
2398 cifs_small_buf_release(rqst->rq_iov[0].iov_base);
2399 for (i = 1; i < rqst->rq_nvec; i++)
2400 if (rqst->rq_iov[i].iov_base != smb2_padding)
2401 kfree(rqst->rq_iov[i].iov_base);
2402 }
1eb9fb52
RS		 2403}
2404
2405int
2406SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
2407 __u8 *oplock, struct smb2_file_all_info *buf,
2408 struct kvec *err_iov, int *buftype)
2409{
2410 struct smb_rqst rqst;
2411 struct smb2_create_rsp *rsp = NULL;
2412 struct TCP_Server_Info *server;
2413 struct cifs_tcon *tcon = oparms->tcon;
2414 struct cifs_ses *ses = tcon->ses;
4d8dfafc 2415 struct kvec iov[SMB2_CREATE_IOV_SIZE];
1eb9fb52 2416 struct kvec rsp_iov = {NULL, 0};
ef2298a0 2417 int resp_buftype = CIFS_NO_BUFFER;
1eb9fb52
RS		 2418 int rc = 0;
2419 int flags = 0;
2420
2421 cifs_dbg(FYI, "create/open\n");
2422 if (ses && (ses->server))
2423 server = ses->server;
2424 else
2425 return -EIO;
2426
2427 if (smb3_encryption_required(tcon))
2428 flags |= CIFS_TRANSFORM_REQ;
2429
40eff45b 2430 memset(&rqst, 0, sizeof(struct smb_rqst));
1eb9fb52 2431 memset(&iov, 0, sizeof(iov));
40eff45b 2432 rqst.rq_iov = iov;
4d8dfafc 2433 rqst.rq_nvec = SMB2_CREATE_IOV_SIZE;
1eb9fb52
RS		 2434
2435 rc = SMB2_open_init(tcon, &rqst, oplock, oparms, path);
2436 if (rc)
2437 goto creat_exit;
40eff45b 2438
efe2e9f3
SF		 2439 trace_smb3_open_enter(xid, tcon->tid, tcon->ses->Suid,
2440 oparms->create_options, oparms->desired_access);
2441
40eff45b 2442 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
4f33bc35 2443 &rsp_iov);
da502f7d 2444 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2503a0db
PS		 2445
2446 if (rc != 0) {
2447 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
91cb74f5
RS		 2448 if (err_iov && rsp) {
2449 *err_iov = rsp_iov;
9d874c36 2450 *buftype = resp_buftype;
91cb74f5
RS		 2451 resp_buftype = CIFS_NO_BUFFER;
2452 rsp = NULL;
2453 }
28d59363
SF		 2454 trace_smb3_open_err(xid, tcon->tid, ses->Suid,
2455 oparms->create_options, oparms->desired_access, rc);
2503a0db 2456 goto creat_exit;
28d59363
SF		 2457 } else
2458 trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid,
2459 ses->Suid, oparms->create_options,
2460 oparms->desired_access);
2503a0db 2461
fae8044c 2462 atomic_inc(&tcon->num_remote_opens);
064f6047
PS		 2463 oparms->fid->persistent_fid = rsp->PersistentFileId;
2464 oparms->fid->volatile_fid = rsp->VolatileFileId;
dfe33f9a
SF		 2465#ifdef CONFIG_CIFS_DEBUG2
2466 oparms->fid->mid = le64_to_cpu(rsp->sync_hdr.MessageId);
2467#endif /* CIFS_DEBUG2 */
f0df737e
PS		 2468
2469 if (buf) {
2470 memcpy(buf, &rsp->CreationTime, 32);
2471 buf->AllocationSize = rsp->AllocationSize;
2472 buf->EndOfFile = rsp->EndofFile;
2473 buf->Attributes = rsp->FileAttributes;
2474 buf->NumberOfLinks = cpu_to_le32(1);
2475 buf->DeletePending = 0;
2476 }
2e44b288 2477
b8c32dbb 2478 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
b0f6df73
RS		 2479 *oplock = smb2_parse_lease_state(server, rsp,
2480 &oparms->fid->epoch,
2481 oparms->fid->lease_key);
b8c32dbb
PS		 2482 else
2483 *oplock = rsp->OplockLevel;
2503a0db 2484creat_exit:
1eb9fb52 2485 SMB2_open_free(&rqst);
2503a0db
PS		 2486 free_rsp_buf(resp_buftype, rsp);
2487 return rc;
2488}
2489
4a72dafa 2490int
ccdc77a3
RS		 2491SMB2_ioctl_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
2492 u64 persistent_fid, u64 volatile_fid, u32 opcode,
153322f7
SF		 2493 bool is_fsctl, char *in_data, u32 indatalen,
2494 __u32 max_response_size)
4a72dafa
SF		 2495{
2496 struct smb2_ioctl_req *req;
ccdc77a3 2497 struct kvec *iov = rqst->rq_iov;
97754680 2498 unsigned int total_len;
ccdc77a3 2499 int rc;
4a72dafa 2500
97754680 2501 rc = smb2_plain_req_init(SMB2_IOCTL, tcon, (void **) &req, &total_len);
4a72dafa
SF		 2502 if (rc)
2503 return rc;
2504
2505 req->CtlCode = cpu_to_le32(opcode);
2506 req->PersistentFileId = persistent_fid;
2507 req->VolatileFileId = volatile_fid;
2508
ccdc77a3
RS		 2509 iov[0].iov_base = (char *)req;
2510 /*
2511 * If no input data, the size of ioctl struct in
2512 * protocol spec still includes a 1 byte data buffer,
2513 * but if input data passed to ioctl, we do not
2514 * want to double count this, so we do not send
2515 * the dummy one byte of data in iovec[0] if sending
2516 * input data (in iovec[1]).
2517 */
4a72dafa
SF		 2518 if (indatalen) {
2519 req->InputCount = cpu_to_le32(indatalen);
2520 /* do not set InputOffset if no input data */
2521 req->InputOffset =
97754680 2522 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer));
ccdc77a3
RS		 2523 rqst->rq_nvec = 2;
2524 iov[0].iov_len = total_len - 1;
4a72dafa
SF		 2525 iov[1].iov_base = in_data;
2526 iov[1].iov_len = indatalen;
ccdc77a3
RS		 2527 } else {
2528 rqst->rq_nvec = 1;
2529 iov[0].iov_len = total_len;
2530 }
4a72dafa
SF		 2531
2532 req->OutputOffset = 0;
2533 req->OutputCount = 0; /* MBZ */
2534
2535 /*
153322f7
SF		 2536 * In most cases max_response_size is set to 16K (CIFSMaxBufSize)
2537 * We Could increase default MaxOutputResponse, but that could require
2538 * more credits. Windows typically sets this smaller, but for some
4a72dafa
SF		 2539 * ioctls it may be useful to allow server to send more. No point
2540 * limiting what the server can send as long as fits in one credit
153322f7
SF		 2541 * We can not handle more than CIFS_MAX_BUF_SIZE yet but may want
2542 * to increase this limit up in the future.
2543 * Note that for snapshot queries that servers like Azure expect that
2544 * the first query be minimal size (and just used to get the number/size
2545 * of previous versions) so response size must be specified as EXACTLY
2546 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2547 * of eight bytes. Currently that is the only case where we set max
2548 * response size smaller.
4a72dafa 2549 */
153322f7 2550 req->MaxOutputResponse = cpu_to_le32(max_response_size);
4a72dafa
SF		 2551
2552 if (is_fsctl)
2553 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
2554 else
2555 req->Flags = 0;
2556
4587eee0
SF		 2557 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
2558 if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO)
97754680 2559 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
4a72dafa 2560
ccdc77a3
RS		 2561 return 0;
2562}
2563
2564void
2565SMB2_ioctl_free(struct smb_rqst *rqst)
2566{
2567 if (rqst && rqst->rq_iov)
2568 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
2569}
2570
153322f7 2571
ccdc77a3
RS		 2572/*
2573 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
2574 */
2575int
2576SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2577 u64 volatile_fid, u32 opcode, bool is_fsctl,
153322f7 2578 char *in_data, u32 indatalen, u32 max_out_data_len,
ccdc77a3
RS		 2579 char **out_data, u32 *plen /* returned data len */)
2580{
2581 struct smb_rqst rqst;
2582 struct smb2_ioctl_rsp *rsp = NULL;
2583 struct cifs_ses *ses;
72c419d9 2584 struct kvec iov[SMB2_IOCTL_IOV_SIZE];
ccdc77a3
RS		 2585 struct kvec rsp_iov = {NULL, 0};
2586 int resp_buftype = CIFS_NO_BUFFER;
2587 int rc = 0;
2588 int flags = 0;
2589
2590 cifs_dbg(FYI, "SMB2 IOCTL\n");
2591
2592 if (out_data != NULL)
2593 *out_data = NULL;
2594
2595 /* zero out returned data len, in case of error */
2596 if (plen)
2597 *plen = 0;
2598
2599 if (tcon)
2600 ses = tcon->ses;
2601 else
2602 return -EIO;
2603
2604 if (!ses || !(ses->server))
2605 return -EIO;
2606
2607 if (smb3_encryption_required(tcon))
2608 flags |= CIFS_TRANSFORM_REQ;
2609
40eff45b 2610 memset(&rqst, 0, sizeof(struct smb_rqst));
ccdc77a3 2611 memset(&iov, 0, sizeof(iov));
40eff45b 2612 rqst.rq_iov = iov;
72c419d9 2613 rqst.rq_nvec = SMB2_IOCTL_IOV_SIZE;
ccdc77a3 2614
153322f7
SF		 2615 rc = SMB2_ioctl_init(tcon, &rqst, persistent_fid, volatile_fid, opcode,
2616 is_fsctl, in_data, indatalen, max_out_data_len);
ccdc77a3
RS		 2617 if (rc)
2618 goto ioctl_exit;
40eff45b
RS		 2619
2620 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
97754680 2621 &rsp_iov);
da502f7d 2622 rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
4a72dafa 2623
eccb4422
SF		 2624 if (rc != 0)
2625 trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid,
2626 ses->Suid, 0, opcode, rc);
2627
9bf0c9cd 2628 if ((rc != 0) && (rc != -EINVAL)) {
8e353106 2629 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
4a72dafa 2630 goto ioctl_exit;
9bf0c9cd
SF		 2631 } else if (rc == -EINVAL) {
2632 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
2633 (opcode != FSCTL_SRV_COPYCHUNK)) {
8e353106 2634 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
9bf0c9cd
SF		 2635 goto ioctl_exit;
2636 }
4a72dafa
SF		 2637 }
2638
2639 /* check if caller wants to look at return data or just return rc */
2640 if ((plen == NULL) || (out_data == NULL))
2641 goto ioctl_exit;
2642
2643 *plen = le32_to_cpu(rsp->OutputCount);
2644
2645 /* We check for obvious errors in the output buffer length and offset */
2646 if (*plen == 0)
2647 goto ioctl_exit; /* server returned no data */
2d204ee9 2648 else if (*plen > rsp_iov.iov_len || *plen > 0xFF00) {
4a72dafa
SF		 2649 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
2650 *plen = 0;
2651 rc = -EIO;
2652 goto ioctl_exit;
2653 }
2654
2d204ee9 2655 if (rsp_iov.iov_len - *plen < le32_to_cpu(rsp->OutputOffset)) {
4a72dafa
SF		 2656 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
2657 le32_to_cpu(rsp->OutputOffset));
2658 *plen = 0;
2659 rc = -EIO;
2660 goto ioctl_exit;
2661 }
2662
d034feeb
Y		 2663 *out_data = kmemdup((char *)rsp + le32_to_cpu(rsp->OutputOffset),
2664 *plen, GFP_KERNEL);
4a72dafa
SF		 2665 if (*out_data == NULL) {
2666 rc = -ENOMEM;
2667 goto ioctl_exit;
2668 }
2669
4a72dafa 2670ioctl_exit:
ccdc77a3 2671 SMB2_ioctl_free(&rqst);
4a72dafa
SF		 2672 free_rsp_buf(resp_buftype, rsp);
2673 return rc;
2674}
2675
64a5cfa6
SF		 2676/*
2677 * Individual callers to ioctl worker function follow
2678 */
2679
2680int
2681SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2682 u64 persistent_fid, u64 volatile_fid)
2683{
2684 int rc;
64a5cfa6
SF		 2685 struct compress_ioctl fsctl_input;
2686 char *ret_data = NULL;
2687
2688 fsctl_input.CompressionState =
bc09d141 2689 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
64a5cfa6
SF		 2690
2691 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
2692 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
2693 (char *)&fsctl_input /* data input */,
153322f7
SF		 2694 2 /* in data len */, CIFSMaxBufSize /* max out data */,
2695 &ret_data /* out data */, NULL);
64a5cfa6
SF		 2696
2697 cifs_dbg(FYI, "set compression rc %d\n", rc);
64a5cfa6
SF		 2698
2699 return rc;
2700}
2701
8eb4ecfa
RS		 2702int
2703SMB2_close_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
2704 u64 persistent_fid, u64 volatile_fid)
2705{
2706 struct smb2_close_req *req;
2707 struct kvec *iov = rqst->rq_iov;
2708 unsigned int total_len;
2709 int rc;
2710
2711 rc = smb2_plain_req_init(SMB2_CLOSE, tcon, (void **) &req, &total_len);
2712 if (rc)
2713 return rc;
2714
2715 req->PersistentFileId = persistent_fid;
2716 req->VolatileFileId = volatile_fid;
2717 iov[0].iov_base = (char *)req;
2718 iov[0].iov_len = total_len;
2719
2720 return 0;
2721}
2722
2723void
2724SMB2_close_free(struct smb_rqst *rqst)
2725{
32a1fb36
RS		 2726 if (rqst && rqst->rq_iov)
2727 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
8eb4ecfa
RS		 2728}
2729
2503a0db 2730int
97ca1762
RS		 2731SMB2_close_flags(const unsigned int xid, struct cifs_tcon *tcon,
2732 u64 persistent_fid, u64 volatile_fid, int flags)
2503a0db 2733{
40eff45b 2734 struct smb_rqst rqst;
8eb4ecfa 2735 struct smb2_close_rsp *rsp = NULL;
2503a0db
PS		 2736 struct cifs_ses *ses = tcon->ses;
2737 struct kvec iov[1];
da502f7d 2738 struct kvec rsp_iov;
ef2298a0 2739 int resp_buftype = CIFS_NO_BUFFER;
2503a0db
PS		 2740 int rc = 0;
2741
f96637be 2742 cifs_dbg(FYI, "Close\n");
2503a0db 2743
68a6afa7 2744 if (!ses || !(ses->server))
2503a0db
PS		 2745 return -EIO;
2746
5a77e75f 2747 if (smb3_encryption_required(tcon))
7fb8986e
PS		 2748 flags |= CIFS_TRANSFORM_REQ;
2749
40eff45b 2750 memset(&rqst, 0, sizeof(struct smb_rqst));
8eb4ecfa 2751 memset(&iov, 0, sizeof(iov));
40eff45b
RS		 2752 rqst.rq_iov = iov;
2753 rqst.rq_nvec = 1;
2754
8eb4ecfa
RS		 2755 rc = SMB2_close_init(tcon, &rqst, persistent_fid, volatile_fid);
2756 if (rc)
2757 goto close_exit;
2758
40eff45b 2759 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 2760 rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
2503a0db
PS		 2761
2762 if (rc != 0) {
d4a029d2 2763 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
eccb4422
SF		 2764 trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid,
2765 rc);
2503a0db
PS		 2766 goto close_exit;
2767 }
2768
fae8044c
SF		 2769 atomic_dec(&tcon->num_remote_opens);
2770
2503a0db
PS		 2771 /* BB FIXME - decode close response, update inode for caching */
2772
2773close_exit:
8eb4ecfa 2774 SMB2_close_free(&rqst);
2503a0db
PS		 2775 free_rsp_buf(resp_buftype, rsp);
2776 return rc;
2777}
be4cb9e3 2778
97ca1762
RS		 2779int
2780SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
2781 u64 persistent_fid, u64 volatile_fid)
2782{
2783 return SMB2_close_flags(xid, tcon, persistent_fid, volatile_fid, 0);
2784}
2785
730928c8
RS		 2786int
2787smb2_validate_iov(unsigned int offset, unsigned int buffer_length,
2788 struct kvec *iov, unsigned int min_buf_size)
be4cb9e3 2789{
c1596ff5 2790 unsigned int smb_len = iov->iov_len;
1fc6ad2f
RS		 2791 char *end_of_smb = smb_len + (char *)iov->iov_base;
2792 char *begin_of_buf = offset + (char *)iov->iov_base;
be4cb9e3
PS		 2793 char *end_of_buf = begin_of_buf + buffer_length;
2794
2795
2796 if (buffer_length < min_buf_size) {
f96637be
JP		 2797 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
2798 buffer_length, min_buf_size);
be4cb9e3
PS		 2799 return -EINVAL;
2800 }
2801
2802 /* check if beyond RFC1001 maximum length */
2803 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
f96637be
JP		 2804 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
2805 buffer_length, smb_len);
be4cb9e3
PS		 2806 return -EINVAL;
2807 }
2808
2809 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
f96637be 2810 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
be4cb9e3
PS		 2811 return -EINVAL;
2812 }
2813
2814 return 0;
2815}
2816
2817/*
2818 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2819 * Caller must free buffer.
2820 */
c5a5f38f
RS		 2821int
2822smb2_validate_and_copy_iov(unsigned int offset, unsigned int buffer_length,
2823 struct kvec *iov, unsigned int minbufsize,
2824 char *data)
be4cb9e3 2825{
1fc6ad2f 2826 char *begin_of_buf = offset + (char *)iov->iov_base;
be4cb9e3
PS		 2827 int rc;
2828
2829 if (!data)
2830 return -EINVAL;
2831
730928c8 2832 rc = smb2_validate_iov(offset, buffer_length, iov, minbufsize);
be4cb9e3
PS		 2833 if (rc)
2834 return rc;
2835
2836 memcpy(data, begin_of_buf, buffer_length);
2837
2838 return 0;
2839}
2840
296ecbae
RS		 2841int
2842SMB2_query_info_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
2843 u64 persistent_fid, u64 volatile_fid,
2844 u8 info_class, u8 info_type, u32 additional_info,
f5b05d62 2845 size_t output_len, size_t input_len, void *input)
be4cb9e3
PS		 2846{
2847 struct smb2_query_info_req *req;
296ecbae 2848 struct kvec *iov = rqst->rq_iov;
b2fb7fec 2849 unsigned int total_len;
296ecbae 2850 int rc;
be4cb9e3 2851
b2fb7fec
RS		 2852 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
2853 &total_len);
be4cb9e3
PS		 2854 if (rc)
2855 return rc;
2856
42c493c1 2857 req->InfoType = info_type;
f0df737e 2858 req->FileInfoClass = info_class;
be4cb9e3
PS		 2859 req->PersistentFileId = persistent_fid;
2860 req->VolatileFileId = volatile_fid;
42c493c1 2861 req->AdditionalInformation = cpu_to_le32(additional_info);
48923d2a 2862
f0df737e 2863 req->OutputBufferLength = cpu_to_le32(output_len);
f5b05d62
RS		 2864 if (input_len) {
2865 req->InputBufferLength = cpu_to_le32(input_len);
2866 /* total_len for smb query request never close to le16 max */
2867 req->InputBufferOffset = cpu_to_le16(total_len - 1);
2868 memcpy(req->Buffer, input, input_len);
2869 }
be4cb9e3
PS		 2870
2871 iov[0].iov_base = (char *)req;
b2fb7fec 2872 /* 1 for Buffer */
f5b05d62 2873 iov[0].iov_len = total_len - 1 + input_len;
296ecbae
RS		 2874 return 0;
2875}
2876
2877void
2878SMB2_query_info_free(struct smb_rqst *rqst)
2879{
32a1fb36
RS		 2880 if (rqst && rqst->rq_iov)
2881 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
296ecbae
RS		 2882}
2883
2884static int
2885query_info(const unsigned int xid, struct cifs_tcon *tcon,
2886 u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
2887 u32 additional_info, size_t output_len, size_t min_len, void **data,
2888 u32 *dlen)
2889{
2890 struct smb_rqst rqst;
2891 struct smb2_query_info_rsp *rsp = NULL;
2892 struct kvec iov[1];
2893 struct kvec rsp_iov;
2894 int rc = 0;
ef2298a0 2895 int resp_buftype = CIFS_NO_BUFFER;
296ecbae
RS		 2896 struct cifs_ses *ses = tcon->ses;
2897 int flags = 0;
73aaf920 2898 bool allocated = false;
296ecbae
RS		 2899
2900 cifs_dbg(FYI, "Query Info\n");
2901
2902 if (!ses || !(ses->server))
2903 return -EIO;
2904
2905 if (smb3_encryption_required(tcon))
2906 flags |= CIFS_TRANSFORM_REQ;
be4cb9e3 2907
40eff45b 2908 memset(&rqst, 0, sizeof(struct smb_rqst));
296ecbae 2909 memset(&iov, 0, sizeof(iov));
40eff45b
RS		 2910 rqst.rq_iov = iov;
2911 rqst.rq_nvec = 1;
2912
296ecbae
RS		 2913 rc = SMB2_query_info_init(tcon, &rqst, persistent_fid, volatile_fid,
2914 info_class, info_type, additional_info,
f5b05d62 2915 output_len, 0, NULL);
296ecbae
RS		 2916 if (rc)
2917 goto qinf_exit;
2918
d42043a6
SF		 2919 trace_smb3_query_info_enter(xid, persistent_fid, tcon->tid,
2920 ses->Suid, info_class, (__u32)info_type);
2921
40eff45b 2922 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 2923 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
e5d04887 2924
be4cb9e3
PS		 2925 if (rc) {
2926 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
eccb4422
SF		 2927 trace_smb3_query_info_err(xid, persistent_fid, tcon->tid,
2928 ses->Suid, info_class, (__u32)info_type, rc);
be4cb9e3
PS		 2929 goto qinf_exit;
2930 }
2931
d42043a6
SF		 2932 trace_smb3_query_info_done(xid, persistent_fid, tcon->tid,
2933 ses->Suid, info_class, (__u32)info_type);
2934
42c493c1
SP		 2935 if (dlen) {
2936 *dlen = le32_to_cpu(rsp->OutputBufferLength);
2937 if (!*data) {
2938 *data = kmalloc(*dlen, GFP_KERNEL);
2939 if (!*data) {
2940 cifs_dbg(VFS,
2941 "Error %d allocating memory for acl\n",
2942 rc);
2943 *dlen = 0;
73aaf920 2944 rc = -ENOMEM;
42c493c1
SP		 2945 goto qinf_exit;
2946 }
73aaf920 2947 allocated = true;
42c493c1
SP		 2948 }
2949 }
2950
c5a5f38f
RS		 2951 rc = smb2_validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset),
2952 le32_to_cpu(rsp->OutputBufferLength),
2953 &rsp_iov, min_len, *data);
73aaf920
CIK		 2954 if (rc && allocated) {
2955 kfree(*data);
2956 *data = NULL;
2957 *dlen = 0;
2958 }
be4cb9e3
PS		 2959
2960qinf_exit:
296ecbae 2961 SMB2_query_info_free(&rqst);
be4cb9e3
PS		 2962 free_rsp_buf(resp_buftype, rsp);
2963 return rc;
2964}
9094fad1 2965
42c493c1
SP		 2966int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
2967 u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data)
2968{
2969 return query_info(xid, tcon, persistent_fid, volatile_fid,
2970 FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0,
2971 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
2972 sizeof(struct smb2_file_all_info), (void **)&data,
2973 NULL);
2974}
2975
f0df737e 2976int
42c493c1 2977SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
f0df737e 2978 u64 persistent_fid, u64 volatile_fid,
42c493c1 2979 void **data, u32 *plen)
f0df737e 2980{
42c493c1
SP		 2981 __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO;
2982 *plen = 0;
2983
f0df737e 2984 return query_info(xid, tcon, persistent_fid, volatile_fid,
42c493c1 2985 0, SMB2_O_INFO_SECURITY, additional_info,
ee25c6dd 2986 SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen);
f0df737e
PS		 2987}
2988
2989int
2990SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
2991 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
2992{
2993 return query_info(xid, tcon, persistent_fid, volatile_fid,
42c493c1
SP		 2994 FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0,
2995 sizeof(struct smb2_file_internal_info),
f0df737e 2996 sizeof(struct smb2_file_internal_info),
42c493c1 2997 (void **)&uniqueid, NULL);
f0df737e
PS		 2998}
2999
9094fad1
PS		 3000/*
3001 * This is a no-op for now. We're not really interested in the reply, but
3002 * rather in the fact that the server sent one and that server->lstrp
3003 * gets updated.
3004 *
3005 * FIXME: maybe we should consider checking that the reply matches request?
3006 */
3007static void
3008smb2_echo_callback(struct mid_q_entry *mid)
3009{
3010 struct TCP_Server_Info *server = mid->callback_data;
31473fc4 3011 struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
34f4deb7 3012 struct cifs_credits credits = { .value = 0, .instance = 0 };
9094fad1 3013
0fd1d37b 3014 if (mid->mid_state == MID_RESPONSE_RECEIVED
34f4deb7
PS		 3015 || mid->mid_state == MID_RESPONSE_MALFORMED) {
3016 credits.value = le16_to_cpu(rsp->sync_hdr.CreditRequest);
3017 credits.instance = server->reconnect_instance;
3018 }
9094fad1
PS		 3019
3020 DeleteMidQEntry(mid);
34f4deb7 3021 add_credits(server, &credits, CIFS_ECHO_OP);
9094fad1
PS		 3022}
3023
53e0e11e
PS		 3024void smb2_reconnect_server(struct work_struct *work)
3025{
3026 struct TCP_Server_Info *server = container_of(work,
3027 struct TCP_Server_Info, reconnect.work);
3028 struct cifs_ses *ses;
3029 struct cifs_tcon *tcon, *tcon2;
3030 struct list_head tmp_list;
3031 int tcon_exist = false;
18ea4311
GP		 3032 int rc;
3033 int resched = false;
3034
53e0e11e
PS		 3035
3036 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
3037 mutex_lock(&server->reconnect_mutex);
3038
3039 INIT_LIST_HEAD(&tmp_list);
3040 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
3041
3042 spin_lock(&cifs_tcp_ses_lock);
3043 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
3044 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
96a988ff 3045 if (tcon->need_reconnect || tcon->need_reopen_files) {
53e0e11e
PS		 3046 tcon->tc_count++;
3047 list_add_tail(&tcon->rlist, &tmp_list);
3048 tcon_exist = true;
3049 }
3050 }
b327a717
AA		 3051 if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) {
3052 list_add_tail(&ses->tcon_ipc->rlist, &tmp_list);
3053 tcon_exist = true;
3054 }
53e0e11e
PS		 3055 }
3056 /*
3057 * Get the reference to server struct to be sure that the last call of
3058 * cifs_put_tcon() in the loop below won't release the server pointer.
3059 */
3060 if (tcon_exist)
3061 server->srv_count++;
3062
3063 spin_unlock(&cifs_tcp_ses_lock);
3064
3065 list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
18ea4311
GP		 3066 rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon);
3067 if (!rc)
96a988ff 3068 cifs_reopen_persistent_handles(tcon);
18ea4311
GP		 3069 else
3070 resched = true;
53e0e11e
PS		 3071 list_del_init(&tcon->rlist);
3072 cifs_put_tcon(tcon);
3073 }
3074
3075 cifs_dbg(FYI, "Reconnecting tcons finished\n");
18ea4311
GP		 3076 if (resched)
3077 queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
53e0e11e
PS		 3078 mutex_unlock(&server->reconnect_mutex);
3079
3080 /* now we can safely release srv struct */
3081 if (tcon_exist)
3082 cifs_put_tcp_session(server, 1);
3083}
3084
9094fad1
PS		 3085int
3086SMB2_echo(struct TCP_Server_Info *server)
3087{
3088 struct smb2_echo_req *req;
3089 int rc = 0;
c713c877 3090 struct kvec iov[1];
738f9de5 3091 struct smb_rqst rqst = { .rq_iov = iov,
c713c877 3092 .rq_nvec = 1 };
7f7ae759 3093 unsigned int total_len;
9094fad1 3094
f96637be 3095 cifs_dbg(FYI, "In echo request\n");
9094fad1 3096
4fcd1813 3097 if (server->tcpStatus == CifsNeedNegotiate) {
53e0e11e
PS		 3098 /* No need to send echo on newly established connections */
3099 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
3100 return rc;
4fcd1813
SF		 3101 }
3102
7f7ae759 3103 rc = smb2_plain_req_init(SMB2_ECHO, NULL, (void **)&req, &total_len);
9094fad1
PS		 3104 if (rc)
3105 return rc;
3106
7f7ae759 3107 req->sync_hdr.CreditRequest = cpu_to_le16(1);
9094fad1 3108
c713c877
RS		 3109 iov[0].iov_len = total_len;
3110 iov[0].iov_base = (char *)req;
9094fad1 3111
9b7c18a2 3112 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
3349c3a7 3113 server, CIFS_ECHO_OP, NULL);
9094fad1 3114 if (rc)
f96637be 3115 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
9094fad1
PS		 3116
3117 cifs_small_buf_release(req);
3118 return rc;
3119}
7a5cfb19
PS		 3120
3121int
3122SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
3123 u64 volatile_fid)
3124{
40eff45b 3125 struct smb_rqst rqst;
7a5cfb19 3126 struct smb2_flush_req *req;
7a5cfb19
PS		 3127 struct cifs_ses *ses = tcon->ses;
3128 struct kvec iov[1];
da502f7d 3129 struct kvec rsp_iov;
7a5cfb19
PS		 3130 int resp_buftype;
3131 int rc = 0;
7fb8986e 3132 int flags = 0;
1f444e4c 3133 unsigned int total_len;
7a5cfb19 3134
f96637be 3135 cifs_dbg(FYI, "Flush\n");
7a5cfb19 3136
68a6afa7 3137 if (!ses || !(ses->server))
7a5cfb19
PS		 3138 return -EIO;
3139
1f444e4c 3140 rc = smb2_plain_req_init(SMB2_FLUSH, tcon, (void **) &req, &total_len);
7a5cfb19
PS		 3141 if (rc)
3142 return rc;
3143
5a77e75f 3144 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3145 flags |= CIFS_TRANSFORM_REQ;
3146
7a5cfb19
PS		 3147 req->PersistentFileId = persistent_fid;
3148 req->VolatileFileId = volatile_fid;
3149
3150 iov[0].iov_base = (char *)req;
1f444e4c 3151 iov[0].iov_len = total_len;
7a5cfb19 3152
40eff45b
RS		 3153 memset(&rqst, 0, sizeof(struct smb_rqst));
3154 rqst.rq_iov = iov;
3155 rqst.rq_nvec = 1;
3156
3157 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 3158 cifs_small_buf_release(req);
7a5cfb19 3159
eccb4422 3160 if (rc != 0) {
7a5cfb19 3161 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
eccb4422
SF		 3162 trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid,
3163 rc);
3164 }
7a5cfb19 3165
da502f7d 3166 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
7a5cfb19
PS		 3167 return rc;
3168}
09a4707e
PS		 3169
3170/*
3171 * To form a chain of read requests, any read requests after the first should
3172 * have the end_of_chain boolean set to true.
3173 */
3174static int
738f9de5 3175smb2_new_read_req(void **buf, unsigned int *total_len,
2dabfd5b
LL		 3176 struct cifs_io_parms *io_parms, struct cifs_readdata *rdata,
3177 unsigned int remaining_bytes, int request_type)
09a4707e
PS		 3178{
3179 int rc = -EACCES;
b8f57ee8 3180 struct smb2_read_plain_req *req = NULL;
31473fc4 3181 struct smb2_sync_hdr *shdr;
2dabfd5b 3182 struct TCP_Server_Info *server;
09a4707e 3183
b8f57ee8
PS		 3184 rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
3185 total_len);
09a4707e
PS		 3186 if (rc)
3187 return rc;
2dabfd5b
LL		 3188
3189 server = io_parms->tcon->ses->server;
3190 if (server == NULL)
09a4707e
PS		 3191 return -ECONNABORTED;
3192
b8f57ee8 3193 shdr = &req->sync_hdr;
31473fc4 3194 shdr->ProcessId = cpu_to_le32(io_parms->pid);
09a4707e
PS		 3195
3196 req->PersistentFileId = io_parms->persistent_fid;
3197 req->VolatileFileId = io_parms->volatile_fid;
3198 req->ReadChannelInfoOffset = 0; /* reserved */
3199 req->ReadChannelInfoLength = 0; /* reserved */
3200 req->Channel = 0; /* reserved */
3201 req->MinimumCount = 0;
3202 req->Length = cpu_to_le32(io_parms->length);
3203 req->Offset = cpu_to_le64(io_parms->offset);
d323c246
SF		 3204
3205 trace_smb3_read_enter(0 /* xid */,
3206 io_parms->persistent_fid,
3207 io_parms->tcon->tid, io_parms->tcon->ses->Suid,
3208 io_parms->offset, io_parms->length);
bd3dcc6a
LL		 3209#ifdef CONFIG_CIFS_SMB_DIRECT
3210 /*
3211 * If we want to do a RDMA write, fill in and append
3212 * smbd_buffer_descriptor_v1 to the end of read request
3213 */
bb4c0419 3214 if (server->rdma && rdata && !server->sign &&
bd3dcc6a
LL		 3215 rdata->bytes >= server->smbd_conn->rdma_readwrite_threshold) {
3216
3217 struct smbd_buffer_descriptor_v1 *v1;
3218 bool need_invalidate =
3219 io_parms->tcon->ses->server->dialect == SMB30_PROT_ID;
3220
3221 rdata->mr = smbd_register_mr(
3222 server->smbd_conn, rdata->pages,
7cf20bce
LL		 3223 rdata->nr_pages, rdata->page_offset,
3224 rdata->tailsz, true, need_invalidate);
bd3dcc6a
LL		 3225 if (!rdata->mr)
3226 return -ENOBUFS;
3227
3228 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
3229 if (need_invalidate)
3230 req->Channel = SMB2_CHANNEL_RDMA_V1;
3231 req->ReadChannelInfoOffset =
2026b06e 3232 cpu_to_le16(offsetof(struct smb2_read_plain_req, Buffer));
bd3dcc6a 3233 req->ReadChannelInfoLength =
2026b06e 3234 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
bd3dcc6a 3235 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
2026b06e
SF		 3236 v1->offset = cpu_to_le64(rdata->mr->mr->iova);
3237 v1->token = cpu_to_le32(rdata->mr->mr->rkey);
3238 v1->length = cpu_to_le32(rdata->mr->mr->length);
bd3dcc6a
LL		 3239
3240 *total_len += sizeof(*v1) - 1;
3241 }
3242#endif
09a4707e
PS		 3243 if (request_type & CHAINED_REQUEST) {
3244 if (!(request_type & END_OF_CHAIN)) {
b8f57ee8
PS		 3245 /* next 8-byte aligned request */
3246 *total_len = DIV_ROUND_UP(*total_len, 8) * 8;
3247 shdr->NextCommand = cpu_to_le32(*total_len);
09a4707e 3248 } else /* END_OF_CHAIN */
31473fc4 3249 shdr->NextCommand = 0;
09a4707e 3250 if (request_type & RELATED_REQUEST) {
31473fc4 3251 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
09a4707e
PS		 3252 /*
3253 * Related requests use info from previous read request
3254 * in chain.
3255 */
31473fc4
PS		 3256 shdr->SessionId = 0xFFFFFFFF;
3257 shdr->TreeId = 0xFFFFFFFF;
09a4707e
PS		 3258 req->PersistentFileId = 0xFFFFFFFF;
3259 req->VolatileFileId = 0xFFFFFFFF;
3260 }
3261 }
3262 if (remaining_bytes > io_parms->length)
3263 req->RemainingBytes = cpu_to_le32(remaining_bytes);
3264 else
3265 req->RemainingBytes = 0;
3266
738f9de5 3267 *buf = req;
09a4707e
PS		 3268 return rc;
3269}
3270
3271static void
3272smb2_readv_callback(struct mid_q_entry *mid)
3273{
3274 struct cifs_readdata *rdata = mid->callback_data;
3275 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
3276 struct TCP_Server_Info *server = tcon->ses->server;
738f9de5 3277 struct smb2_sync_hdr *shdr =
977b6170 3278 (struct smb2_sync_hdr *)rdata->iov[0].iov_base;
34f4deb7 3279 struct cifs_credits credits = { .value = 0, .instance = 0 };
738f9de5
PS		 3280 struct smb_rqst rqst = { .rq_iov = rdata->iov,
3281 .rq_nvec = 2,
8321fec4 3282 .rq_pages = rdata->pages,
1dbe3466 3283 .rq_offset = rdata->page_offset,
8321fec4
JL		 3284 .rq_npages = rdata->nr_pages,
3285 .rq_pagesz = rdata->pagesz,
3286 .rq_tailsz = rdata->tailsz };
09a4707e 3287
f96637be
JP		 3288 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
3289 __func__, mid->mid, mid->mid_state, rdata->result,
3290 rdata->bytes);
09a4707e
PS		 3291
3292 switch (mid->mid_state) {
3293 case MID_RESPONSE_RECEIVED:
34f4deb7
PS		 3294 credits.value = le16_to_cpu(shdr->CreditRequest);
3295 credits.instance = server->reconnect_instance;
09a4707e 3296 /* result already set, check signature */
4326ed2f 3297 if (server->sign && !mid->decrypted) {
3c1bf7e4
PS		 3298 int rc;
3299
0b688cfc 3300 rc = smb2_verify_signature(&rqst, server);
3c1bf7e4 3301 if (rc)
f96637be
JP		 3302 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
3303 rc);
3c1bf7e4 3304 }
09a4707e 3305 /* FIXME: should this be counted toward the initiating task? */
34a54d61
PS		 3306 task_io_account_read(rdata->got_bytes);
3307 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 3308 break;
3309 case MID_REQUEST_SUBMITTED:
3310 case MID_RETRY_NEEDED:
3311 rdata->result = -EAGAIN;
d913ed17
PS		 3312 if (server->sign && rdata->got_bytes)
3313 /* reset bytes number since we can not check a sign */
3314 rdata->got_bytes = 0;
3315 /* FIXME: should this be counted toward the initiating task? */
3316 task_io_account_read(rdata->got_bytes);
3317 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e 3318 break;
0fd1d37b 3319 case MID_RESPONSE_MALFORMED:
34f4deb7
PS		 3320 credits.value = le16_to_cpu(shdr->CreditRequest);
3321 credits.instance = server->reconnect_instance;
0fd1d37b 3322 /* fall through */
09a4707e 3323 default:
6b15eb18 3324 rdata->result = -EIO;
09a4707e 3325 }
bd3dcc6a
LL		 3326#ifdef CONFIG_CIFS_SMB_DIRECT
3327 /*
3328 * If this rdata has a memmory registered, the MR can be freed
3329 * MR needs to be freed as soon as I/O finishes to prevent deadlock
3330 * because they have limited number and are used for future I/Os
3331 */
3332 if (rdata->mr) {
3333 smbd_deregister_mr(rdata->mr);
3334 rdata->mr = NULL;
3335 }
3336#endif
082aaa87 3337 if (rdata->result && rdata->result != -ENODATA) {
09a4707e 3338 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
7d42e72f
PS		 3339 trace_smb3_read_err(0 /* xid */,
3340 rdata->cfile->fid.persistent_fid,
3341 tcon->tid, tcon->ses->Suid, rdata->offset,
3342 rdata->bytes, rdata->result);
3343 } else
3344 trace_smb3_read_done(0 /* xid */,
3345 rdata->cfile->fid.persistent_fid,
3346 tcon->tid, tcon->ses->Suid,
3347 rdata->offset, rdata->got_bytes);
09a4707e
PS		 3348
3349 queue_work(cifsiod_wq, &rdata->work);
3350 DeleteMidQEntry(mid);
34f4deb7 3351 add_credits(server, &credits, 0);
09a4707e
PS		 3352}
3353
738f9de5 3354/* smb2_async_readv - send an async read, and set up mid to handle result */
09a4707e
PS		 3355int
3356smb2_async_readv(struct cifs_readdata *rdata)
3357{
bed9da02 3358 int rc, flags = 0;
31473fc4
PS		 3359 char *buf;
3360 struct smb2_sync_hdr *shdr;
09a4707e 3361 struct cifs_io_parms io_parms;
738f9de5 3362 struct smb_rqst rqst = { .rq_iov = rdata->iov,
c713c877 3363 .rq_nvec = 1 };
bed9da02 3364 struct TCP_Server_Info *server;
738f9de5 3365 unsigned int total_len;
09a4707e 3366
f96637be
JP		 3367 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
3368 __func__, rdata->offset, rdata->bytes);
09a4707e
PS		 3369
3370 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
3371 io_parms.offset = rdata->offset;
3372 io_parms.length = rdata->bytes;
3373 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
3374 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
3375 io_parms.pid = rdata->pid;
bed9da02
PS		 3376
3377 server = io_parms.tcon->ses->server;
3378
2dabfd5b
LL		 3379 rc = smb2_new_read_req(
3380 (void **) &buf, &total_len, &io_parms, rdata, 0, 0);
f0b93cb9 3381 if (rc)
09a4707e
PS		 3382 return rc;
3383
5a77e75f 3384 if (smb3_encryption_required(io_parms.tcon))
7fb8986e
PS		 3385 flags |= CIFS_TRANSFORM_REQ;
3386
c713c877
RS		 3387 rdata->iov[0].iov_base = buf;
3388 rdata->iov[0].iov_len = total_len;
b8f57ee8
PS		 3389
3390 shdr = (struct smb2_sync_hdr *)buf;
09a4707e 3391
335b7b62 3392 if (rdata->credits.value > 0) {
31473fc4 3393 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
bed9da02 3394 SMB2_MAX_BUFFER_SIZE));
b983f7e9
PS		 3395 shdr->CreditRequest =
3396 cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 1);
9a1c67e8
PS		 3397
3398 rc = adjust_credits(server, &rdata->credits, rdata->bytes);
3399 if (rc)
335b7b62 3400 goto async_readv_out;
9a1c67e8 3401
7fb8986e 3402 flags |= CIFS_HAS_CREDITS;
bed9da02
PS		 3403 }
3404
09a4707e 3405 kref_get(&rdata->refcount);
fec344e3 3406 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
09a4707e 3407 cifs_readv_receive, smb2_readv_callback,
3349c3a7
PS		 3408 smb3_handle_read_data, rdata, flags,
3409 &rdata->credits);
e5d04887 3410 if (rc) {
09a4707e 3411 kref_put(&rdata->refcount, cifs_readdata_release);
e5d04887 3412 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
7d42e72f
PS		 3413 trace_smb3_read_err(0 /* xid */, io_parms.persistent_fid,
3414 io_parms.tcon->tid,
3415 io_parms.tcon->ses->Suid,
3416 io_parms.offset, io_parms.length, rc);
3417 }
09a4707e 3418
335b7b62 3419async_readv_out:
09a4707e
PS		 3420 cifs_small_buf_release(buf);
3421 return rc;
3422}
33319141 3423
d8e05039
PS		 3424int
3425SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
3426 unsigned int *nbytes, char **buf, int *buf_type)
3427{
40eff45b 3428 struct smb_rqst rqst;
d8e05039 3429 int resp_buftype, rc = -EACCES;
b8f57ee8 3430 struct smb2_read_plain_req *req = NULL;
d8e05039 3431 struct smb2_read_rsp *rsp = NULL;
f5688a6d 3432 struct kvec iov[1];
da502f7d 3433 struct kvec rsp_iov;
738f9de5 3434 unsigned int total_len;
7fb8986e
PS		 3435 int flags = CIFS_LOG_ERROR;
3436 struct cifs_ses *ses = io_parms->tcon->ses;
d8e05039
PS		 3437
3438 *nbytes = 0;
2dabfd5b 3439 rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0);
d8e05039
PS		 3440 if (rc)
3441 return rc;
3442
5a77e75f 3443 if (smb3_encryption_required(io_parms->tcon))
7fb8986e
PS		 3444 flags |= CIFS_TRANSFORM_REQ;
3445
f5688a6d
RS		 3446 iov[0].iov_base = (char *)req;
3447 iov[0].iov_len = total_len;
b8f57ee8 3448
40eff45b
RS		 3449 memset(&rqst, 0, sizeof(struct smb_rqst));
3450 rqst.rq_iov = iov;
3451 rqst.rq_nvec = 1;
3452
3453 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 3454 rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
d8e05039 3455
a821df3f
RS		 3456 if (rc) {
3457 if (rc != -ENODATA) {
3458 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
3459 cifs_dbg(VFS, "Send error in read = %d\n", rc);
7d42e72f
PS		 3460 trace_smb3_read_err(xid, req->PersistentFileId,
3461 io_parms->tcon->tid, ses->Suid,
3462 io_parms->offset, io_parms->length,
3463 rc);
b0a42f2a
SF		 3464 } else
3465 trace_smb3_read_done(xid, req->PersistentFileId,
3466 io_parms->tcon->tid, ses->Suid,
3467 io_parms->offset, 0);
da502f7d 3468 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
a821df3f 3469 return rc == -ENODATA ? 0 : rc;
eccb4422
SF		 3470 } else
3471 trace_smb3_read_done(xid, req->PersistentFileId,
3472 io_parms->tcon->tid, ses->Suid,
3473 io_parms->offset, io_parms->length);
d8e05039 3474
088aaf17
Z		 3475 cifs_small_buf_release(req);
3476
a821df3f
RS		 3477 *nbytes = le32_to_cpu(rsp->DataLength);
3478 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
3479 (*nbytes > io_parms->length)) {
3480 cifs_dbg(FYI, "bad length %d for count %d\n",
3481 *nbytes, io_parms->length);
3482 rc = -EIO;
3483 *nbytes = 0;
d8e05039
PS		 3484 }
3485
3486 if (*buf) {
977b6170 3487 memcpy(*buf, (char *)rsp + rsp->DataOffset, *nbytes);
da502f7d 3488 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
d8e05039 3489 } else if (resp_buftype != CIFS_NO_BUFFER) {
da502f7d 3490 *buf = rsp_iov.iov_base;
d8e05039
PS		 3491 if (resp_buftype == CIFS_SMALL_BUFFER)
3492 *buf_type = CIFS_SMALL_BUFFER;
3493 else if (resp_buftype == CIFS_LARGE_BUFFER)
3494 *buf_type = CIFS_LARGE_BUFFER;
3495 }
3496 return rc;
3497}
3498
33319141
PS		 3499/*
3500 * Check the mid_state and signature on received buffer (if any), and queue the
3501 * workqueue completion task.
3502 */
3503static void
3504smb2_writev_callback(struct mid_q_entry *mid)
3505{
3506 struct cifs_writedata *wdata = mid->callback_data;
3507 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
34f4deb7 3508 struct TCP_Server_Info *server = tcon->ses->server;
33319141
PS		 3509 unsigned int written;
3510 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
34f4deb7 3511 struct cifs_credits credits = { .value = 0, .instance = 0 };
33319141
PS		 3512
3513 switch (mid->mid_state) {
3514 case MID_RESPONSE_RECEIVED:
34f4deb7
PS		 3515 credits.value = le16_to_cpu(rsp->sync_hdr.CreditRequest);
3516 credits.instance = server->reconnect_instance;
3517 wdata->result = smb2_check_receive(mid, server, 0);
33319141
PS		 3518 if (wdata->result != 0)
3519 break;
3520
3521 written = le32_to_cpu(rsp->DataLength);
3522 /*
3523 * Mask off high 16 bits when bytes written as returned
3524 * by the server is greater than bytes requested by the
3525 * client. OS/2 servers are known to set incorrect
3526 * CountHigh values.
3527 */
3528 if (written > wdata->bytes)
3529 written &= 0xFFFF;
3530
3531 if (written < wdata->bytes)
3532 wdata->result = -ENOSPC;
3533 else
3534 wdata->bytes = written;
3535 break;
3536 case MID_REQUEST_SUBMITTED:
3537 case MID_RETRY_NEEDED:
3538 wdata->result = -EAGAIN;
3539 break;
0fd1d37b 3540 case MID_RESPONSE_MALFORMED:
34f4deb7
PS		 3541 credits.value = le16_to_cpu(rsp->sync_hdr.CreditRequest);
3542 credits.instance = server->reconnect_instance;
0fd1d37b 3543 /* fall through */
33319141
PS		 3544 default:
3545 wdata->result = -EIO;
3546 break;
3547 }
db223a59
LL		 3548#ifdef CONFIG_CIFS_SMB_DIRECT
3549 /*
3550 * If this wdata has a memory registered, the MR can be freed
3551 * The number of MRs available is limited, it's important to recover
3552 * used MR as soon as I/O is finished. Hold MR longer in the later
3553 * I/O process can possibly result in I/O deadlock due to lack of MR
3554 * to send request on I/O retry
3555 */
3556 if (wdata->mr) {
3557 smbd_deregister_mr(wdata->mr);
3558 wdata->mr = NULL;
3559 }
3560#endif
7d42e72f 3561 if (wdata->result) {
33319141 3562 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
7d42e72f
PS		 3563 trace_smb3_write_err(0 /* no xid */,
3564 wdata->cfile->fid.persistent_fid,
3565 tcon->tid, tcon->ses->Suid, wdata->offset,
3566 wdata->bytes, wdata->result);
3567 } else
3568 trace_smb3_write_done(0 /* no xid */,
3569 wdata->cfile->fid.persistent_fid,
3570 tcon->tid, tcon->ses->Suid,
3571 wdata->offset, wdata->bytes);
33319141
PS		 3572
3573 queue_work(cifsiod_wq, &wdata->work);
3574 DeleteMidQEntry(mid);
34f4deb7 3575 add_credits(server, &credits, 0);
33319141
PS		 3576}
3577
3578/* smb2_async_writev - send an async write, and set up mid to handle result */
3579int
4a5c80d7
SF		 3580smb2_async_writev(struct cifs_writedata *wdata,
3581 void (*release)(struct kref *kref))
33319141 3582{
cb7e9eab 3583 int rc = -EACCES, flags = 0;
33319141 3584 struct smb2_write_req *req = NULL;
31473fc4 3585 struct smb2_sync_hdr *shdr;
33319141 3586 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
cb7e9eab 3587 struct TCP_Server_Info *server = tcon->ses->server;
c713c877 3588 struct kvec iov[1];
738f9de5 3589 struct smb_rqst rqst = { };
f5688a6d 3590 unsigned int total_len;
33319141 3591
f5688a6d 3592 rc = smb2_plain_req_init(SMB2_WRITE, tcon, (void **) &req, &total_len);
f0b93cb9
PS		 3593 if (rc)
3594 return rc;
33319141 3595
5a77e75f 3596 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3597 flags |= CIFS_TRANSFORM_REQ;
3598
f5688a6d 3599 shdr = (struct smb2_sync_hdr *)req;
31473fc4 3600 shdr->ProcessId = cpu_to_le32(wdata->cfile->pid);
33319141
PS		 3601
3602 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
3603 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
3604 req->WriteChannelInfoOffset = 0;
3605 req->WriteChannelInfoLength = 0;
3606 req->Channel = 0;
3607 req->Offset = cpu_to_le64(wdata->offset);
33319141 3608 req->DataOffset = cpu_to_le16(
f5688a6d 3609 offsetof(struct smb2_write_req, Buffer));
33319141 3610 req->RemainingBytes = 0;
d323c246
SF		 3611
3612 trace_smb3_write_enter(0 /* xid */, wdata->cfile->fid.persistent_fid,
3613 tcon->tid, tcon->ses->Suid, wdata->offset, wdata->bytes);
db223a59
LL		 3614#ifdef CONFIG_CIFS_SMB_DIRECT
3615 /*
3616 * If we want to do a server RDMA read, fill in and append
3617 * smbd_buffer_descriptor_v1 to the end of write request
3618 */
bb4c0419 3619 if (server->rdma && !server->sign && wdata->bytes >=
db223a59
LL		 3620 server->smbd_conn->rdma_readwrite_threshold) {
3621
3622 struct smbd_buffer_descriptor_v1 *v1;
3623 bool need_invalidate = server->dialect == SMB30_PROT_ID;
3624
3625 wdata->mr = smbd_register_mr(
3626 server->smbd_conn, wdata->pages,
7cf20bce
LL		 3627 wdata->nr_pages, wdata->page_offset,
3628 wdata->tailsz, false, need_invalidate);
db223a59
LL		 3629 if (!wdata->mr) {
3630 rc = -ENOBUFS;
3631 goto async_writev_out;
3632 }
3633 req->Length = 0;
3634 req->DataOffset = 0;
7cf20bce
LL		 3635 if (wdata->nr_pages > 1)
3636 req->RemainingBytes =
3637 cpu_to_le32(
3638 (wdata->nr_pages - 1) * wdata->pagesz -
3639 wdata->page_offset + wdata->tailsz
3640 );
3641 else
3642 req->RemainingBytes = cpu_to_le32(wdata->tailsz);
db223a59
LL		 3643 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
3644 if (need_invalidate)
3645 req->Channel = SMB2_CHANNEL_RDMA_V1;
3646 req->WriteChannelInfoOffset =
2026b06e 3647 cpu_to_le16(offsetof(struct smb2_write_req, Buffer));
db223a59 3648 req->WriteChannelInfoLength =
2026b06e 3649 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
db223a59 3650 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
2026b06e
SF		 3651 v1->offset = cpu_to_le64(wdata->mr->mr->iova);
3652 v1->token = cpu_to_le32(wdata->mr->mr->rkey);
3653 v1->length = cpu_to_le32(wdata->mr->mr->length);
db223a59
LL		 3654 }
3655#endif
c713c877
RS		 3656 iov[0].iov_len = total_len - 1;
3657 iov[0].iov_base = (char *)req;
33319141 3658
738f9de5 3659 rqst.rq_iov = iov;
c713c877 3660 rqst.rq_nvec = 1;
eddb079d 3661 rqst.rq_pages = wdata->pages;
57a929a6 3662 rqst.rq_offset = wdata->page_offset;
eddb079d
JL		 3663 rqst.rq_npages = wdata->nr_pages;
3664 rqst.rq_pagesz = wdata->pagesz;
3665 rqst.rq_tailsz = wdata->tailsz;
db223a59
LL		 3666#ifdef CONFIG_CIFS_SMB_DIRECT
3667 if (wdata->mr) {
c713c877 3668 iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1);
db223a59
LL		 3669 rqst.rq_npages = 0;
3670 }
3671#endif
f96637be
JP		 3672 cifs_dbg(FYI, "async write at %llu %u bytes\n",
3673 wdata->offset, wdata->bytes);
33319141 3674
db223a59
LL		 3675#ifdef CONFIG_CIFS_SMB_DIRECT
3676 /* For RDMA read, I/O size is in RemainingBytes not in Length */
3677 if (!wdata->mr)
3678 req->Length = cpu_to_le32(wdata->bytes);
3679#else
33319141 3680 req->Length = cpu_to_le32(wdata->bytes);
db223a59 3681#endif
33319141 3682
335b7b62 3683 if (wdata->credits.value > 0) {
31473fc4 3684 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
cb7e9eab 3685 SMB2_MAX_BUFFER_SIZE));
b983f7e9
PS		 3686 shdr->CreditRequest =
3687 cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 1);
9a1c67e8
PS		 3688
3689 rc = adjust_credits(server, &wdata->credits, wdata->bytes);
3690 if (rc)
335b7b62 3691 goto async_writev_out;
9a1c67e8 3692
7fb8986e 3693 flags |= CIFS_HAS_CREDITS;
cb7e9eab
PS		 3694 }
3695
33319141 3696 kref_get(&wdata->refcount);
9b7c18a2 3697 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
3349c3a7 3698 wdata, flags, &wdata->credits);
33319141 3699
e5d04887 3700 if (rc) {
eccb4422
SF		 3701 trace_smb3_write_err(0 /* no xid */, req->PersistentFileId,
3702 tcon->tid, tcon->ses->Suid, wdata->offset,
3703 wdata->bytes, rc);
4a5c80d7 3704 kref_put(&wdata->refcount, release);
e5d04887 3705 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
7d42e72f 3706 }
33319141 3707
33319141
PS		 3708async_writev_out:
3709 cifs_small_buf_release(req);
33319141
PS		 3710 return rc;
3711}
009d3443
PS		 3712
3713/*
3714 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
3715 * The length field from io_parms must be at least 1 and indicates a number of
3716 * elements with data to write that begins with position 1 in iov array. All
3717 * data length is specified by count.
3718 */
3719int
3720SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
3721 unsigned int *nbytes, struct kvec *iov, int n_vec)
3722{
40eff45b 3723 struct smb_rqst rqst;
009d3443
PS		 3724 int rc = 0;
3725 struct smb2_write_req *req = NULL;
3726 struct smb2_write_rsp *rsp = NULL;
3727 int resp_buftype;
da502f7d 3728 struct kvec rsp_iov;
7fb8986e 3729 int flags = 0;
f5688a6d 3730 unsigned int total_len;
da502f7d 3731
009d3443
PS		 3732 *nbytes = 0;
3733
3734 if (n_vec < 1)
3735 return rc;
3736
f5688a6d
RS		 3737 rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, (void **) &req,
3738 &total_len);
009d3443
PS		 3739 if (rc)
3740 return rc;
3741
3742 if (io_parms->tcon->ses->server == NULL)
3743 return -ECONNABORTED;
3744
5a77e75f 3745 if (smb3_encryption_required(io_parms->tcon))
7fb8986e
PS		 3746 flags |= CIFS_TRANSFORM_REQ;
3747
f5688a6d 3748 req->sync_hdr.ProcessId = cpu_to_le32(io_parms->pid);
009d3443
PS		 3749
3750 req->PersistentFileId = io_parms->persistent_fid;
3751 req->VolatileFileId = io_parms->volatile_fid;
3752 req->WriteChannelInfoOffset = 0;
3753 req->WriteChannelInfoLength = 0;
3754 req->Channel = 0;
3755 req->Length = cpu_to_le32(io_parms->length);
3756 req->Offset = cpu_to_le64(io_parms->offset);
009d3443 3757 req->DataOffset = cpu_to_le16(
f5688a6d 3758 offsetof(struct smb2_write_req, Buffer));
009d3443
PS		 3759 req->RemainingBytes = 0;
3760
d323c246
SF		 3761 trace_smb3_write_enter(xid, io_parms->persistent_fid,
3762 io_parms->tcon->tid, io_parms->tcon->ses->Suid,
3763 io_parms->offset, io_parms->length);
3764
009d3443 3765 iov[0].iov_base = (char *)req;
f5688a6d
RS		 3766 /* 1 for Buffer */
3767 iov[0].iov_len = total_len - 1;
009d3443 3768
40eff45b
RS		 3769 memset(&rqst, 0, sizeof(struct smb_rqst));
3770 rqst.rq_iov = iov;
3771 rqst.rq_nvec = n_vec + 1;
3772
3773 rc = cifs_send_recv(xid, io_parms->tcon->ses, &rqst,
f5688a6d 3774 &resp_buftype, flags, &rsp_iov);
da502f7d 3775 rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
009d3443
PS		 3776
3777 if (rc) {
eccb4422
SF		 3778 trace_smb3_write_err(xid, req->PersistentFileId,
3779 io_parms->tcon->tid,
3780 io_parms->tcon->ses->Suid,
3781 io_parms->offset, io_parms->length, rc);
009d3443 3782 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
f96637be 3783 cifs_dbg(VFS, "Send error in write = %d\n", rc);
eccb4422 3784 } else {
009d3443 3785 *nbytes = le32_to_cpu(rsp->DataLength);
eccb4422
SF		 3786 trace_smb3_write_done(xid, req->PersistentFileId,
3787 io_parms->tcon->tid,
3788 io_parms->tcon->ses->Suid,
3789 io_parms->offset, *nbytes);
3790 }
e5d04887 3791
6a3eb336 3792 cifs_small_buf_release(req);
e5d04887 3793 free_rsp_buf(resp_buftype, rsp);
009d3443
PS		 3794 return rc;
3795}
35143eb5 3796
d324f08d
PS		 3797static unsigned int
3798num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
3799{
3800 int len;
3801 unsigned int entrycount = 0;
3802 unsigned int next_offset = 0;
56446f21
DC		 3803 char *entryptr;
3804 FILE_DIRECTORY_INFO *dir_info;
d324f08d
PS		 3805
3806 if (bufstart == NULL)
3807 return 0;
3808
56446f21 3809 entryptr = bufstart;
d324f08d
PS		 3810
3811 while (1) {
56446f21
DC		 3812 if (entryptr + next_offset < entryptr ||
3813 entryptr + next_offset > end_of_buf ||
3814 entryptr + next_offset + size > end_of_buf) {
f96637be 3815 cifs_dbg(VFS, "malformed search entry would overflow\n");
d324f08d
PS		 3816 break;
3817 }
3818
56446f21
DC		 3819 entryptr = entryptr + next_offset;
3820 dir_info = (FILE_DIRECTORY_INFO *)entryptr;
3821
3822 len = le32_to_cpu(dir_info->FileNameLength);
3823 if (entryptr + len < entryptr ||
3824 entryptr + len > end_of_buf ||
3825 entryptr + len + size > end_of_buf) {
f96637be
JP		 3826 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
3827 end_of_buf);
d324f08d
PS		 3828 break;
3829 }
3830
56446f21 3831 *lastentry = entryptr;
d324f08d
PS		 3832 entrycount++;
3833
56446f21 3834 next_offset = le32_to_cpu(dir_info->NextEntryOffset);
d324f08d
PS		 3835 if (!next_offset)
3836 break;
3837 }
3838
3839 return entrycount;
3840}
3841
3842/*
3843 * Readdir/FindFirst
3844 */
3845int
3846SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
3847 u64 persistent_fid, u64 volatile_fid, int index,
3848 struct cifs_search_info *srch_inf)
3849{
40eff45b 3850 struct smb_rqst rqst;
d324f08d
PS		 3851 struct smb2_query_directory_req *req;
3852 struct smb2_query_directory_rsp *rsp = NULL;
3853 struct kvec iov[2];
da502f7d 3854 struct kvec rsp_iov;
d324f08d
PS		 3855 int rc = 0;
3856 int len;
75fdfc84 3857 int resp_buftype = CIFS_NO_BUFFER;
d324f08d
PS		 3858 unsigned char *bufptr;
3859 struct TCP_Server_Info *server;
3860 struct cifs_ses *ses = tcon->ses;
3861 __le16 asteriks = cpu_to_le16('*');
3862 char *end_of_smb;
3863 unsigned int output_size = CIFSMaxBufSize;
3864 size_t info_buf_size;
7fb8986e 3865 int flags = 0;
7c00c3a6 3866 unsigned int total_len;
d324f08d
PS		 3867
3868 if (ses && (ses->server))
3869 server = ses->server;
3870 else
3871 return -EIO;
3872
7c00c3a6
RS		 3873 rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req,
3874 &total_len);
d324f08d
PS		 3875 if (rc)
3876 return rc;
3877
5a77e75f 3878 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3879 flags |= CIFS_TRANSFORM_REQ;
3880
d324f08d
PS		 3881 switch (srch_inf->info_level) {
3882 case SMB_FIND_FILE_DIRECTORY_INFO:
3883 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
3884 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
3885 break;
3886 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
3887 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
3888 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
3889 break;
3890 default:
f96637be
JP		 3891 cifs_dbg(VFS, "info level %u isn't supported\n",
3892 srch_inf->info_level);
d324f08d
PS		 3893 rc = -EINVAL;
3894 goto qdir_exit;
3895 }
3896
3897 req->FileIndex = cpu_to_le32(index);
3898 req->PersistentFileId = persistent_fid;
3899 req->VolatileFileId = volatile_fid;
3900
3901 len = 0x2;
3902 bufptr = req->Buffer;
3903 memcpy(bufptr, &asteriks, len);
3904
3905 req->FileNameOffset =
7c00c3a6 3906 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1);
d324f08d
PS		 3907 req->FileNameLength = cpu_to_le16(len);
3908 /*
3909 * BB could be 30 bytes or so longer if we used SMB2 specific
3910 * buffer lengths, but this is safe and close enough.
3911 */
3912 output_size = min_t(unsigned int, output_size, server->maxBuf);
3913 output_size = min_t(unsigned int, output_size, 2 << 15);
3914 req->OutputBufferLength = cpu_to_le32(output_size);
3915
3916 iov[0].iov_base = (char *)req;
7c00c3a6
RS		 3917 /* 1 for Buffer */
3918 iov[0].iov_len = total_len - 1;
d324f08d
PS		 3919
3920 iov[1].iov_base = (char *)(req->Buffer);
3921 iov[1].iov_len = len;
3922
40eff45b
RS		 3923 memset(&rqst, 0, sizeof(struct smb_rqst));
3924 rqst.rq_iov = iov;
3925 rqst.rq_nvec = 2;
3926
d323c246
SF		 3927 trace_smb3_query_dir_enter(xid, persistent_fid, tcon->tid,
3928 tcon->ses->Suid, index, output_size);
3929
40eff45b 3930 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 3931 cifs_small_buf_release(req);
3932 rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
e5d04887 3933
d324f08d 3934 if (rc) {
31473fc4 3935 if (rc == -ENODATA &&
49f466bd 3936 rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
adb3b4e9
SF		 3937 trace_smb3_query_dir_done(xid, persistent_fid,
3938 tcon->tid, tcon->ses->Suid, index, 0);
52755808
PS		 3939 srch_inf->endOfSearch = true;
3940 rc = 0;
adb3b4e9
SF		 3941 } else {
3942 trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
3943 tcon->ses->Suid, index, 0, rc);
8e6e72ae 3944 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
adb3b4e9 3945 }
d324f08d
PS		 3946 goto qdir_exit;
3947 }
d324f08d 3948
730928c8
RS		 3949 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
3950 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
3951 info_buf_size);
adb3b4e9
SF		 3952 if (rc) {
3953 trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
3954 tcon->ses->Suid, index, 0, rc);
d324f08d 3955 goto qdir_exit;
adb3b4e9 3956 }
d324f08d
PS		 3957
3958 srch_inf->unicode = true;
3959
3960 if (srch_inf->ntwrk_buf_start) {
3961 if (srch_inf->smallBuf)
3962 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
3963 else
3964 cifs_buf_release(srch_inf->ntwrk_buf_start);
3965 }
3966 srch_inf->ntwrk_buf_start = (char *)rsp;
977b6170
RS		 3967 srch_inf->srch_entries_start = srch_inf->last_entry =
3968 (char *)rsp + le16_to_cpu(rsp->OutputBufferOffset);
3969 end_of_smb = rsp_iov.iov_len + (char *)rsp;
d324f08d
PS		 3970 srch_inf->entries_in_buffer =
3971 num_entries(srch_inf->srch_entries_start, end_of_smb,
3972 &srch_inf->last_entry, info_buf_size);
3973 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
f96637be
JP		 3974 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
3975 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
3976 srch_inf->srch_entries_start, srch_inf->last_entry);
d324f08d
PS		 3977 if (resp_buftype == CIFS_LARGE_BUFFER)
3978 srch_inf->smallBuf = false;
3979 else if (resp_buftype == CIFS_SMALL_BUFFER)
3980 srch_inf->smallBuf = true;
3981 else
f96637be 3982 cifs_dbg(VFS, "illegal search buffer type\n");
d324f08d 3983
adb3b4e9
SF		 3984 trace_smb3_query_dir_done(xid, persistent_fid, tcon->tid,
3985 tcon->ses->Suid, index, srch_inf->entries_in_buffer);
d324f08d
PS		 3986 return rc;
3987
3988qdir_exit:
3989 free_rsp_buf(resp_buftype, rsp);
3990 return rc;
3991}
3992
ba8ca116
RS		 3993int
3994SMB2_set_info_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
dac95340 3995 u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
ba8ca116 3996 u8 info_type, u32 additional_info,
dac95340 3997 void **data, unsigned int *size)
35143eb5
PS		 3998{
3999 struct smb2_set_info_req *req;
ba8ca116
RS		 4000 struct kvec *iov = rqst->rq_iov;
4001 unsigned int i, total_len;
4002 int rc;
35143eb5 4003
2fc803ef 4004 rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, (void **) &req, &total_len);
ba8ca116 4005 if (rc)
35143eb5 4006 return rc;
7fb8986e 4007
2fc803ef 4008 req->sync_hdr.ProcessId = cpu_to_le32(pid);
dac95340 4009 req->InfoType = info_type;
35143eb5
PS		 4010 req->FileInfoClass = info_class;
4011 req->PersistentFileId = persistent_fid;
4012 req->VolatileFileId = volatile_fid;
dac95340 4013 req->AdditionalInformation = cpu_to_le32(additional_info);
35143eb5 4014
35143eb5 4015 req->BufferOffset =
2fc803ef 4016 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1);
35143eb5
PS		 4017 req->BufferLength = cpu_to_le32(*size);
4018
35143eb5 4019 memcpy(req->Buffer, *data, *size);
2fc803ef 4020 total_len += *size;
35143eb5
PS		 4021
4022 iov[0].iov_base = (char *)req;
2fc803ef
RS		 4023 /* 1 for Buffer */
4024 iov[0].iov_len = total_len - 1;
35143eb5 4025
ba8ca116 4026 for (i = 1; i < rqst->rq_nvec; i++) {
35143eb5
PS		 4027 le32_add_cpu(&req->BufferLength, size[i]);
4028 iov[i].iov_base = (char *)data[i];
4029 iov[i].iov_len = size[i];
4030 }
4031
ba8ca116
RS		 4032 return 0;
4033}
4034
4035void
4036SMB2_set_info_free(struct smb_rqst *rqst)
4037{
32a1fb36
RS		 4038 if (rqst && rqst->rq_iov)
4039 cifs_buf_release(rqst->rq_iov[0].iov_base); /* request */
ba8ca116
RS		 4040}
4041
4042static int
4043send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
4044 u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
4045 u8 info_type, u32 additional_info, unsigned int num,
4046 void **data, unsigned int *size)
4047{
4048 struct smb_rqst rqst;
4049 struct smb2_set_info_rsp *rsp = NULL;
4050 struct kvec *iov;
4051 struct kvec rsp_iov;
4052 int rc = 0;
4053 int resp_buftype;
4054 struct cifs_ses *ses = tcon->ses;
4055 int flags = 0;
4056
4057 if (!ses || !(ses->server))
4058 return -EIO;
4059
4060 if (!num)
4061 return -EINVAL;
4062
4063 if (smb3_encryption_required(tcon))
4064 flags |= CIFS_TRANSFORM_REQ;
4065
4066 iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL);
4067 if (!iov)
4068 return -ENOMEM;
4069
40eff45b
RS		 4070 memset(&rqst, 0, sizeof(struct smb_rqst));
4071 rqst.rq_iov = iov;
4072 rqst.rq_nvec = num;
4073
ba8ca116
RS		 4074 rc = SMB2_set_info_init(tcon, &rqst, persistent_fid, volatile_fid, pid,
4075 info_class, info_type, additional_info,
4076 data, size);
4077 if (rc) {
4078 kfree(iov);
4079 return rc;
4080 }
4081
4082
40eff45b 4083 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
2fc803ef 4084 &rsp_iov);
ba8ca116 4085 SMB2_set_info_free(&rqst);
da502f7d 4086 rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
35143eb5 4087
eccb4422 4088 if (rc != 0) {
35143eb5 4089 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
eccb4422
SF		 4090 trace_smb3_set_info_err(xid, persistent_fid, tcon->tid,
4091 ses->Suid, info_class, (__u32)info_type, rc);
4092 }
7d3fb24b 4093
35143eb5
PS		 4094 free_rsp_buf(resp_buftype, rsp);
4095 kfree(iov);
4096 return rc;
4097}
4098
c839ff24
PS		 4099int
4100SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
3764cbd1 4101 u64 volatile_fid, u32 pid, __le64 *eof)
c839ff24
PS		 4102{
4103 struct smb2_file_eof_info info;
4104 void *data;
4105 unsigned int size;
4106
4107 info.EndOfFile = *eof;
4108
4109 data = &info;
4110 size = sizeof(struct smb2_file_eof_info);
4111
3764cbd1 4112 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 4113 pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE,
4114 0, 1, &data, &size);
c839ff24 4115}
1feeaac7 4116
dac95340
SP		 4117int
4118SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
4119 u64 persistent_fid, u64 volatile_fid,
4120 struct cifs_ntsd *pnntsd, int pacllen, int aclflag)
4121{
4122 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
4123 current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag,
4124 1, (void **)&pnntsd, &pacllen);
1feeaac7 4125}
983c88a4 4126
5517554e
RS		 4127int
4128SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
4129 u64 persistent_fid, u64 volatile_fid,
4130 struct smb2_file_full_ea_info *buf, int len)
4131{
4132 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
4133 current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE,
4134 0, 1, (void **)&buf, &len);
4135}
4136
983c88a4
PS		 4137int
4138SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
4139 const u64 persistent_fid, const u64 volatile_fid,
4140 __u8 oplock_level)
4141{
40eff45b 4142 struct smb_rqst rqst;
983c88a4 4143 int rc;
0d5a288d 4144 struct smb2_oplock_break *req = NULL;
21ad9487 4145 struct cifs_ses *ses = tcon->ses;
7fb8986e 4146 int flags = CIFS_OBREAK_OP;
21ad9487
RS		 4147 unsigned int total_len;
4148 struct kvec iov[1];
4149 struct kvec rsp_iov;
4150 int resp_buf_type;
983c88a4 4151
f96637be 4152 cifs_dbg(FYI, "SMB2_oplock_break\n");
21ad9487
RS		 4153 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
4154 &total_len);
983c88a4
PS		 4155 if (rc)
4156 return rc;
4157
5a77e75f 4158 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4159 flags |= CIFS_TRANSFORM_REQ;
4160
983c88a4
PS		 4161 req->VolatileFid = volatile_fid;
4162 req->PersistentFid = persistent_fid;
4163 req->OplockLevel = oplock_level;
21ad9487 4164 req->sync_hdr.CreditRequest = cpu_to_le16(1);
983c88a4 4165
21ad9487
RS		 4166 flags |= CIFS_NO_RESP;
4167
4168 iov[0].iov_base = (char *)req;
4169 iov[0].iov_len = total_len;
4170
40eff45b
RS		 4171 memset(&rqst, 0, sizeof(struct smb_rqst));
4172 rqst.rq_iov = iov;
4173 rqst.rq_nvec = 1;
4174
4175 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
da502f7d 4176 cifs_small_buf_release(req);
983c88a4
PS		 4177
4178 if (rc) {
4179 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 4180 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
983c88a4
PS		 4181 }
4182
4183 return rc;
4184}
6fc05c25 4185
730928c8
RS		 4186void
4187smb2_copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
4188 struct kstatfs *kst)
6fc05c25
PS		 4189{
4190 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
4191 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
4192 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
42bec214
SP		 4193 kst->f_bfree = kst->f_bavail =
4194 le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
6fc05c25
PS		 4195 return;
4196}
4197
2d304217
SF		 4198static void
4199copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO *response_data,
4200 struct kstatfs *kst)
4201{
4202 kst->f_bsize = le32_to_cpu(response_data->BlockSize);
4203 kst->f_blocks = le64_to_cpu(response_data->TotalBlocks);
4204 kst->f_bfree = le64_to_cpu(response_data->BlocksAvail);
4205 if (response_data->UserBlocksAvail == cpu_to_le64(-1))
4206 kst->f_bavail = kst->f_bfree;
4207 else
4208 kst->f_bavail = le64_to_cpu(response_data->UserBlocksAvail);
4209 if (response_data->TotalFileNodes != cpu_to_le64(-1))
4210 kst->f_files = le64_to_cpu(response_data->TotalFileNodes);
4211 if (response_data->FreeFileNodes != cpu_to_le64(-1))
4212 kst->f_ffree = le64_to_cpu(response_data->FreeFileNodes);
4213
4214 return;
4215}
2d304217 4216
6fc05c25
PS		 4217static int
4218build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
4219 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
4220{
4221 int rc;
4222 struct smb2_query_info_req *req;
b2fb7fec 4223 unsigned int total_len;
6fc05c25 4224
f96637be 4225 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
6fc05c25
PS		 4226
4227 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
4228 return -EIO;
4229
b2fb7fec
RS		 4230 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
4231 &total_len);
6fc05c25
PS		 4232 if (rc)
4233 return rc;
4234
4235 req->InfoType = SMB2_O_INFO_FILESYSTEM;
4236 req->FileInfoClass = level;
4237 req->PersistentFileId = persistent_fid;
4238 req->VolatileFileId = volatile_fid;
b2fb7fec 4239 /* 1 for pad */
6fc05c25 4240 req->InputBufferOffset =
b2fb7fec 4241 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1);
6fc05c25 4242 req->OutputBufferLength = cpu_to_le32(
1fc6ad2f 4243 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1);
6fc05c25
PS		 4244
4245 iov->iov_base = (char *)req;
b2fb7fec 4246 iov->iov_len = total_len;
6fc05c25
PS		 4247 return 0;
4248}
4249
2d304217
SF		 4250int
4251SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon,
4252 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
4253{
4254 struct smb_rqst rqst;
4255 struct smb2_query_info_rsp *rsp = NULL;
4256 struct kvec iov;
4257 struct kvec rsp_iov;
4258 int rc = 0;
4259 int resp_buftype;
4260 struct cifs_ses *ses = tcon->ses;
4261 FILE_SYSTEM_POSIX_INFO *info = NULL;
4262 int flags = 0;
4263
4264 rc = build_qfs_info_req(&iov, tcon, FS_POSIX_INFORMATION,
4265 sizeof(FILE_SYSTEM_POSIX_INFO),
4266 persistent_fid, volatile_fid);
4267 if (rc)
4268 return rc;
4269
4270 if (smb3_encryption_required(tcon))
4271 flags |= CIFS_TRANSFORM_REQ;
4272
4273 memset(&rqst, 0, sizeof(struct smb_rqst));
4274 rqst.rq_iov = &iov;
4275 rqst.rq_nvec = 1;
4276
4277 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
4278 cifs_small_buf_release(iov.iov_base);
4279 if (rc) {
4280 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
4281 goto posix_qfsinf_exit;
4282 }
4283 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
4284
4285 info = (FILE_SYSTEM_POSIX_INFO *)(
4286 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
730928c8
RS		 4287 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
4288 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
4289 sizeof(FILE_SYSTEM_POSIX_INFO));
2d304217
SF		 4290 if (!rc)
4291 copy_posix_fs_info_to_kstatfs(info, fsdata);
4292
4293posix_qfsinf_exit:
4294 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
4295 return rc;
4296}
2d304217 4297
6fc05c25
PS		 4298int
4299SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
4300 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
4301{
40eff45b 4302 struct smb_rqst rqst;
6fc05c25
PS		 4303 struct smb2_query_info_rsp *rsp = NULL;
4304 struct kvec iov;
da502f7d 4305 struct kvec rsp_iov;
6fc05c25
PS		 4306 int rc = 0;
4307 int resp_buftype;
4308 struct cifs_ses *ses = tcon->ses;
4309 struct smb2_fs_full_size_info *info = NULL;
7fb8986e 4310 int flags = 0;
6fc05c25
PS		 4311
4312 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
4313 sizeof(struct smb2_fs_full_size_info),
4314 persistent_fid, volatile_fid);
4315 if (rc)
4316 return rc;
4317
5a77e75f 4318 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4319 flags |= CIFS_TRANSFORM_REQ;
4320
40eff45b
RS		 4321 memset(&rqst, 0, sizeof(struct smb_rqst));
4322 rqst.rq_iov = &iov;
4323 rqst.rq_nvec = 1;
4324
4325 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 4326 cifs_small_buf_release(iov.iov_base);
6fc05c25
PS		 4327 if (rc) {
4328 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
34f62640 4329 goto qfsinf_exit;
6fc05c25 4330 }
da502f7d 4331 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
6fc05c25 4332
1fc6ad2f 4333 info = (struct smb2_fs_full_size_info *)(
49f466bd 4334 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
730928c8
RS		 4335 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
4336 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
4337 sizeof(struct smb2_fs_full_size_info));
6fc05c25 4338 if (!rc)
730928c8 4339 smb2_copy_fs_info_to_kstatfs(info, fsdata);
6fc05c25 4340
34f62640 4341qfsinf_exit:
da502f7d 4342 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
34f62640
SF		 4343 return rc;
4344}
4345
4346int
4347SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2167114c 4348 u64 persistent_fid, u64 volatile_fid, int level)
34f62640 4349{
40eff45b 4350 struct smb_rqst rqst;
34f62640
SF		 4351 struct smb2_query_info_rsp *rsp = NULL;
4352 struct kvec iov;
da502f7d 4353 struct kvec rsp_iov;
34f62640 4354 int rc = 0;
2167114c 4355 int resp_buftype, max_len, min_len;
34f62640
SF		 4356 struct cifs_ses *ses = tcon->ses;
4357 unsigned int rsp_len, offset;
7fb8986e 4358 int flags = 0;
34f62640 4359
2167114c
SF		 4360 if (level == FS_DEVICE_INFORMATION) {
4361 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
4362 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
4363 } else if (level == FS_ATTRIBUTE_INFORMATION) {
4364 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
4365 min_len = MIN_FS_ATTR_INFO_SIZE;
af6a12ea
SF		 4366 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
4367 max_len = sizeof(struct smb3_fs_ss_info);
4368 min_len = sizeof(struct smb3_fs_ss_info);
21ba3845
SF		 4369 } else if (level == FS_VOLUME_INFORMATION) {
4370 max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN;
4371 min_len = sizeof(struct smb3_fs_vol_info);
2167114c 4372 } else {
af6a12ea 4373 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2167114c
SF		 4374 return -EINVAL;
4375 }
4376
4377 rc = build_qfs_info_req(&iov, tcon, level, max_len,
34f62640
SF		 4378 persistent_fid, volatile_fid);
4379 if (rc)
4380 return rc;
4381
5a77e75f 4382 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4383 flags |= CIFS_TRANSFORM_REQ;
4384
40eff45b
RS		 4385 memset(&rqst, 0, sizeof(struct smb_rqst));
4386 rqst.rq_iov = &iov;
4387 rqst.rq_nvec = 1;
4388
4389 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 4390 cifs_small_buf_release(iov.iov_base);
34f62640
SF		 4391 if (rc) {
4392 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
4393 goto qfsattr_exit;
4394 }
da502f7d 4395 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
34f62640
SF		 4396
4397 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
4398 offset = le16_to_cpu(rsp->OutputBufferOffset);
730928c8 4399 rc = smb2_validate_iov(offset, rsp_len, &rsp_iov, min_len);
2167114c
SF		 4400 if (rc)
4401 goto qfsattr_exit;
4402
4403 if (level == FS_ATTRIBUTE_INFORMATION)
1fc6ad2f 4404 memcpy(&tcon->fsAttrInfo, offset
49f466bd 4405 + (char *)rsp, min_t(unsigned int,
2167114c
SF		 4406 rsp_len, max_len));
4407 else if (level == FS_DEVICE_INFORMATION)
1fc6ad2f 4408 memcpy(&tcon->fsDevInfo, offset
49f466bd 4409 + (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO));
af6a12ea
SF		 4410 else if (level == FS_SECTOR_SIZE_INFORMATION) {
4411 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
1fc6ad2f 4412 (offset + (char *)rsp);
af6a12ea
SF		 4413 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
4414 tcon->perf_sector_size =
4415 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
21ba3845
SF		 4416 } else if (level == FS_VOLUME_INFORMATION) {
4417 struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *)
4418 (offset + (char *)rsp);
4419 tcon->vol_serial_number = vol_info->VolumeSerialNumber;
4420 tcon->vol_create_time = vol_info->VolumeCreationTime;
af6a12ea 4421 }
34f62640
SF		 4422
4423qfsattr_exit:
da502f7d 4424 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
6fc05c25
PS		 4425 return rc;
4426}
f7ba7fe6
PS		 4427
4428int
4429smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
4430 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
4431 const __u32 num_lock, struct smb2_lock_element *buf)
4432{
40eff45b 4433 struct smb_rqst rqst;
f7ba7fe6
PS		 4434 int rc = 0;
4435 struct smb2_lock_req *req = NULL;
4436 struct kvec iov[2];
da502f7d 4437 struct kvec rsp_iov;
f7ba7fe6
PS		 4438 int resp_buf_type;
4439 unsigned int count;
7fb8986e 4440 int flags = CIFS_NO_RESP;
ced93679 4441 unsigned int total_len;
f7ba7fe6 4442
f96637be 4443 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
f7ba7fe6 4444
ced93679 4445 rc = smb2_plain_req_init(SMB2_LOCK, tcon, (void **) &req, &total_len);
f7ba7fe6
PS		 4446 if (rc)
4447 return rc;
4448
5a77e75f 4449 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4450 flags |= CIFS_TRANSFORM_REQ;
4451
ced93679 4452 req->sync_hdr.ProcessId = cpu_to_le32(pid);
f7ba7fe6
PS		 4453 req->LockCount = cpu_to_le16(num_lock);
4454
4455 req->PersistentFileId = persist_fid;
4456 req->VolatileFileId = volatile_fid;
4457
4458 count = num_lock * sizeof(struct smb2_lock_element);
f7ba7fe6
PS		 4459
4460 iov[0].iov_base = (char *)req;
ced93679 4461 iov[0].iov_len = total_len - sizeof(struct smb2_lock_element);
f7ba7fe6
PS		 4462 iov[1].iov_base = (char *)buf;
4463 iov[1].iov_len = count;
4464
4465 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
40eff45b
RS		 4466
4467 memset(&rqst, 0, sizeof(struct smb_rqst));
4468 rqst.rq_iov = iov;
4469 rqst.rq_nvec = 2;
4470
4471 rc = cifs_send_recv(xid, tcon->ses, &rqst, &resp_buf_type, flags,
ced93679 4472 &rsp_iov);
da502f7d 4473 cifs_small_buf_release(req);
f7ba7fe6 4474 if (rc) {
f96637be 4475 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
f7ba7fe6 4476 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
eccb4422
SF		 4477 trace_smb3_lock_err(xid, persist_fid, tcon->tid,
4478 tcon->ses->Suid, rc);
f7ba7fe6
PS		 4479 }
4480
4481 return rc;
4482}
4483
4484int
4485SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
4486 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
4487 const __u64 length, const __u64 offset, const __u32 lock_flags,
4488 const bool wait)
4489{
4490 struct smb2_lock_element lock;
4491
4492 lock.Offset = cpu_to_le64(offset);
4493 lock.Length = cpu_to_le64(length);
4494 lock.Flags = cpu_to_le32(lock_flags);
4495 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
4496 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
4497
4498 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
4499}
0822f514
PS		 4500
4501int
4502SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
4503 __u8 *lease_key, const __le32 lease_state)
4504{
40eff45b 4505 struct smb_rqst rqst;
0822f514
PS		 4506 int rc;
4507 struct smb2_lease_ack *req = NULL;
8eb7998e 4508 struct cifs_ses *ses = tcon->ses;
7fb8986e 4509 int flags = CIFS_OBREAK_OP;
8eb7998e
RS		 4510 unsigned int total_len;
4511 struct kvec iov[1];
4512 struct kvec rsp_iov;
4513 int resp_buf_type;
179e44d4
SF		 4514 __u64 *please_key_high;
4515 __u64 *please_key_low;
0822f514 4516
f96637be 4517 cifs_dbg(FYI, "SMB2_lease_break\n");
8eb7998e
RS		 4518 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
4519 &total_len);
0822f514
PS		 4520 if (rc)
4521 return rc;
4522
5a77e75f 4523 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4524 flags |= CIFS_TRANSFORM_REQ;
4525
8eb7998e 4526 req->sync_hdr.CreditRequest = cpu_to_le16(1);
0822f514 4527 req->StructureSize = cpu_to_le16(36);
8eb7998e 4528 total_len += 12;
0822f514
PS		 4529
4530 memcpy(req->LeaseKey, lease_key, 16);
4531 req->LeaseState = lease_state;
4532
8eb7998e
RS		 4533 flags |= CIFS_NO_RESP;
4534
4535 iov[0].iov_base = (char *)req;
4536 iov[0].iov_len = total_len;
4537
40eff45b
RS		 4538 memset(&rqst, 0, sizeof(struct smb_rqst));
4539 rqst.rq_iov = iov;
4540 rqst.rq_nvec = 1;
4541
4542 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
da502f7d 4543 cifs_small_buf_release(req);
0822f514 4544
d339adc1
AA		 4545 please_key_low = (__u64 *)lease_key;
4546 please_key_high = (__u64 *)(lease_key+8);
0822f514
PS		 4547 if (rc) {
4548 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
179e44d4
SF		 4549 trace_smb3_lease_err(le32_to_cpu(lease_state), tcon->tid,
4550 ses->Suid, *please_key_low, *please_key_high, rc);
f96637be 4551 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
179e44d4
SF		 4552 } else
4553 trace_smb3_lease_done(le32_to_cpu(lease_state), tcon->tid,
4554 ses->Suid, *please_key_low, *please_key_high);
0822f514
PS		 4555
4556 return rc;
4557}
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