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cifs: Fix NULL pointer dereference of devname
[linux-block.git] / fs / cifs / smb2pdu.c
CommitLineData
ec2e4523
PS		 1/*
2 * fs/cifs/smb2pdu.c
3 *
2b80d049 4 * Copyright (C) International Business Machines Corp., 2009, 2013
ec2e4523
PS		 5 * Etersoft, 2012
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
8 *
9 * Contains the routines for constructing the SMB2 PDUs themselves
10 *
11 * This library is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published
13 * by the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
15 *
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
19 * the GNU Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 */
25
26 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
27 /* Note that there are handle based routines which must be */
28 /* treated slightly differently for reconnection purposes since we never */
29 /* want to reuse a stale file handle and only the caller knows the file info */
30
31#include <linux/fs.h>
32#include <linux/kernel.h>
33#include <linux/vfs.h>
09a4707e 34#include <linux/task_io_accounting_ops.h>
ec2e4523 35#include <linux/uaccess.h>
c6e970a0 36#include <linux/uuid.h>
33319141 37#include <linux/pagemap.h>
ec2e4523
PS		 38#include <linux/xattr.h>
39#include "smb2pdu.h"
40#include "cifsglob.h"
41#include "cifsacl.h"
42#include "cifsproto.h"
43#include "smb2proto.h"
44#include "cifs_unicode.h"
45#include "cifs_debug.h"
46#include "ntlmssp.h"
47#include "smb2status.h"
09a4707e 48#include "smb2glob.h"
d324f08d 49#include "cifspdu.h"
ceb1b0b9 50#include "cifs_spnego.h"
db223a59 51#include "smbdirect.h"
eccb4422 52#include "trace.h"
a3a53b76
PA		 53#ifdef CONFIG_CIFS_DFS_UPCALL
54#include "dfs_cache.h"
55#endif
ec2e4523
PS		 56
57/*
58 * The following table defines the expected "StructureSize" of SMB2 requests
59 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
60 *
61 * Note that commands are defined in smb2pdu.h in le16 but the array below is
62 * indexed by command in host byte order.
63 */
64static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
65 /* SMB2_NEGOTIATE */ 36,
66 /* SMB2_SESSION_SETUP */ 25,
67 /* SMB2_LOGOFF */ 4,
68 /* SMB2_TREE_CONNECT */ 9,
69 /* SMB2_TREE_DISCONNECT */ 4,
70 /* SMB2_CREATE */ 57,
71 /* SMB2_CLOSE */ 24,
72 /* SMB2_FLUSH */ 24,
73 /* SMB2_READ */ 49,
74 /* SMB2_WRITE */ 49,
75 /* SMB2_LOCK */ 48,
76 /* SMB2_IOCTL */ 57,
77 /* SMB2_CANCEL */ 4,
78 /* SMB2_ECHO */ 4,
79 /* SMB2_QUERY_DIRECTORY */ 33,
80 /* SMB2_CHANGE_NOTIFY */ 32,
81 /* SMB2_QUERY_INFO */ 41,
82 /* SMB2_SET_INFO */ 33,
83 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
84};
85
730928c8 86int smb3_encryption_required(const struct cifs_tcon *tcon)
7fb8986e 87{
ae6f8dd4
PS		 88 if (!tcon)
89 return 0;
7fb8986e
PS		 90 if ((tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
91 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
92 return 1;
ae6f8dd4
PS		 93 if (tcon->seal &&
94 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
95 return 1;
7fb8986e
PS		 96 return 0;
97}
ec2e4523
PS		 98
99static void
cb200bd6 100smb2_hdr_assemble(struct smb2_sync_hdr *shdr, __le16 smb2_cmd,
ec2e4523
PS		 101 const struct cifs_tcon *tcon)
102{
31473fc4
PS		 103 shdr->ProtocolId = SMB2_PROTO_NUMBER;
104 shdr->StructureSize = cpu_to_le16(64);
105 shdr->Command = smb2_cmd;
7d414f39
RL		 106 if (tcon && tcon->ses && tcon->ses->server) {
107 struct TCP_Server_Info *server = tcon->ses->server;
108
109 spin_lock(&server->req_lock);
110 /* Request up to 2 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 -
7d414f39
RL		 116 server->credits, 2));
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) {
15bc77f9 176 snprintf(tree, MAX_TREE_SIZE, "\\\\%s\\IPC$",
a3a53b76 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
15bc77f9 209 snprintf(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);
493}
494
ebb3a9d4 495static void
13cacea7
RS		 496assemble_neg_contexts(struct smb2_negotiate_req *req,
497 unsigned int *total_len)
ebb3a9d4 498{
d5c7076b 499 char *pneg_ctxt = (char *)req;
fcef0db6 500 unsigned int ctxt_len;
ebb3a9d4 501
d5c7076b
SF		 502 if (*total_len > 200) {
503 /* In case length corrupted don't want to overrun smb buffer */
504 cifs_dbg(VFS, "Bad frame length assembling neg contexts\n");
505 return;
506 }
507
508 /*
509 * round up total_len of fixed part of SMB3 negotiate request to 8
510 * byte boundary before adding negotiate contexts
511 */
512 *total_len = roundup(*total_len, 8);
513
514 pneg_ctxt = (*total_len) + (char *)req;
515 req->NegotiateContextOffset = cpu_to_le32(*total_len);
516
ebb3a9d4 517 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
fcef0db6
SF		 518 ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_preauth_neg_context), 8) * 8;
519 *total_len += ctxt_len;
520 pneg_ctxt += ctxt_len;
13cacea7 521
ebb3a9d4 522 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
fcef0db6
SF		 523 ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_encryption_neg_context), 8) * 8;
524 *total_len += ctxt_len;
525 pneg_ctxt += ctxt_len;
526
527 build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
528 *total_len += sizeof(struct smb2_posix_neg_context);
13cacea7 529
fcef0db6 530 req->NegotiateContextCount = cpu_to_le16(3);
ebb3a9d4 531}
5100d8a3
SF		 532
533static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt)
534{
535 unsigned int len = le16_to_cpu(ctxt->DataLength);
536
537 /* If invalid preauth context warn but use what we requested, SHA-512 */
538 if (len < MIN_PREAUTH_CTXT_DATA_LEN) {
539 printk_once(KERN_WARNING "server sent bad preauth context\n");
540 return;
541 }
542 if (le16_to_cpu(ctxt->HashAlgorithmCount) != 1)
543 printk_once(KERN_WARNING "illegal SMB3 hash algorithm count\n");
544 if (ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
545 printk_once(KERN_WARNING "unknown SMB3 hash algorithm\n");
546}
547
548static int decode_encrypt_ctx(struct TCP_Server_Info *server,
549 struct smb2_encryption_neg_context *ctxt)
550{
551 unsigned int len = le16_to_cpu(ctxt->DataLength);
552
553 cifs_dbg(FYI, "decode SMB3.11 encryption neg context of len %d\n", len);
554 if (len < MIN_ENCRYPT_CTXT_DATA_LEN) {
555 printk_once(KERN_WARNING "server sent bad crypto ctxt len\n");
556 return -EINVAL;
557 }
558
559 if (le16_to_cpu(ctxt->CipherCount) != 1) {
560 printk_once(KERN_WARNING "illegal SMB3.11 cipher count\n");
561 return -EINVAL;
562 }
563 cifs_dbg(FYI, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt->Ciphers[0]));
564 if ((ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_CCM) &&
565 (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_GCM)) {
566 printk_once(KERN_WARNING "invalid SMB3.11 cipher returned\n");
567 return -EINVAL;
568 }
569 server->cipher_type = ctxt->Ciphers[0];
23657ad7 570 server->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
5100d8a3
SF		 571 return 0;
572}
573
574static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp,
977b6170
RS		 575 struct TCP_Server_Info *server,
576 unsigned int len_of_smb)
5100d8a3
SF		 577{
578 struct smb2_neg_context *pctx;
579 unsigned int offset = le32_to_cpu(rsp->NegotiateContextOffset);
580 unsigned int ctxt_cnt = le16_to_cpu(rsp->NegotiateContextCount);
5100d8a3
SF		 581 unsigned int len_of_ctxts, i;
582 int rc = 0;
583
584 cifs_dbg(FYI, "decoding %d negotiate contexts\n", ctxt_cnt);
585 if (len_of_smb <= offset) {
586 cifs_dbg(VFS, "Invalid response: negotiate context offset\n");
587 return -EINVAL;
588 }
589
590 len_of_ctxts = len_of_smb - offset;
591
592 for (i = 0; i < ctxt_cnt; i++) {
593 int clen;
594 /* check that offset is not beyond end of SMB */
595 if (len_of_ctxts == 0)
596 break;
597
598 if (len_of_ctxts < sizeof(struct smb2_neg_context))
599 break;
600
1fc6ad2f 601 pctx = (struct smb2_neg_context *)(offset + (char *)rsp);
5100d8a3
SF		 602 clen = le16_to_cpu(pctx->DataLength);
603 if (clen > len_of_ctxts)
604 break;
605
606 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES)
607 decode_preauth_context(
608 (struct smb2_preauth_neg_context *)pctx);
609 else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES)
610 rc = decode_encrypt_ctx(server,
611 (struct smb2_encryption_neg_context *)pctx);
fcef0db6
SF		 612 else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE)
613 server->posix_ext_supported = true;
5100d8a3
SF		 614 else
615 cifs_dbg(VFS, "unknown negcontext of type %d ignored\n",
616 le16_to_cpu(pctx->ContextType));
617
618 if (rc)
619 break;
620 /* offsets must be 8 byte aligned */
621 clen = (clen + 7) & ~0x7;
622 offset += clen + sizeof(struct smb2_neg_context);
623 len_of_ctxts -= clen;
624 }
625 return rc;
626}
627
ce558b0e
SF		 628static struct create_posix *
629create_posix_buf(umode_t mode)
630{
631 struct create_posix *buf;
632
633 buf = kzalloc(sizeof(struct create_posix),
634 GFP_KERNEL);
635 if (!buf)
636 return NULL;
637
638 buf->ccontext.DataOffset =
639 cpu_to_le16(offsetof(struct create_posix, Mode));
640 buf->ccontext.DataLength = cpu_to_le32(4);
641 buf->ccontext.NameOffset =
642 cpu_to_le16(offsetof(struct create_posix, Name));
643 buf->ccontext.NameLength = cpu_to_le16(16);
644
645 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
646 buf->Name[0] = 0x93;
647 buf->Name[1] = 0xAD;
648 buf->Name[2] = 0x25;
649 buf->Name[3] = 0x50;
650 buf->Name[4] = 0x9C;
651 buf->Name[5] = 0xB4;
652 buf->Name[6] = 0x11;
653 buf->Name[7] = 0xE7;
654 buf->Name[8] = 0xB4;
655 buf->Name[9] = 0x23;
656 buf->Name[10] = 0x83;
657 buf->Name[11] = 0xDE;
658 buf->Name[12] = 0x96;
659 buf->Name[13] = 0x8B;
660 buf->Name[14] = 0xCD;
661 buf->Name[15] = 0x7C;
662 buf->Mode = cpu_to_le32(mode);
663 cifs_dbg(FYI, "mode on posix create 0%o", mode);
664 return buf;
665}
666
667static int
668add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode)
669{
670 struct smb2_create_req *req = iov[0].iov_base;
671 unsigned int num = *num_iovec;
672
673 iov[num].iov_base = create_posix_buf(mode);
674 if (iov[num].iov_base == NULL)
675 return -ENOMEM;
676 iov[num].iov_len = sizeof(struct create_posix);
677 if (!req->CreateContextsOffset)
678 req->CreateContextsOffset = cpu_to_le32(
679 sizeof(struct smb2_create_req) +
680 iov[num - 1].iov_len);
681 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_posix));
682 *num_iovec = num + 1;
683 return 0;
684}
685
ebb3a9d4 686
ec2e4523
PS		 687/*
688 *
689 * SMB2 Worker functions follow:
690 *
691 * The general structure of the worker functions is:
692 * 1) Call smb2_init (assembles SMB2 header)
693 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
694 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
695 * 4) Decode SMB2 command specific fields in the fixed length area
696 * 5) Decode variable length data area (if any for this SMB2 command type)
697 * 6) Call free smb buffer
698 * 7) return
699 *
700 */
701
702int
703SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
704{
40eff45b 705 struct smb_rqst rqst;
ec2e4523
PS		 706 struct smb2_negotiate_req *req;
707 struct smb2_negotiate_rsp *rsp;
708 struct kvec iov[1];
da502f7d 709 struct kvec rsp_iov;
ec2e4523
PS		 710 int rc = 0;
711 int resp_buftype;
3534b850 712 struct TCP_Server_Info *server = ses->server;
ec2e4523
PS		 713 int blob_offset, blob_length;
714 char *security_blob;
715 int flags = CIFS_NEG_OP;
13cacea7 716 unsigned int total_len;
ec2e4523 717
f96637be 718 cifs_dbg(FYI, "Negotiate protocol\n");
ec2e4523 719
3534b850
JL		 720 if (!server) {
721 WARN(1, "%s: server is NULL!\n", __func__);
722 return -EIO;
ec2e4523
PS		 723 }
724
13cacea7 725 rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, (void **) &req, &total_len);
ec2e4523
PS		 726 if (rc)
727 return rc;
728
13cacea7 729 req->sync_hdr.SessionId = 0;
0fdfef9a 730
8bd68c6e
AA		 731 memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
732 memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
ec2e4523 733
9764c02f
SF		 734 if (strcmp(ses->server->vals->version_string,
735 SMB3ANY_VERSION_STRING) == 0) {
736 req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
737 req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
738 req->DialectCount = cpu_to_le16(2);
13cacea7 739 total_len += 4;
9764c02f
SF		 740 } else if (strcmp(ses->server->vals->version_string,
741 SMBDEFAULT_VERSION_STRING) == 0) {
742 req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
743 req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
744 req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
d5c7076b
SF		 745 req->Dialects[3] = cpu_to_le16(SMB311_PROT_ID);
746 req->DialectCount = cpu_to_le16(4);
747 total_len += 8;
9764c02f
SF		 748 } else {
749 /* otherwise send specific dialect */
750 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
751 req->DialectCount = cpu_to_le16(1);
13cacea7 752 total_len += 2;
9764c02f 753 }
ec2e4523
PS		 754
755 /* only one of SMB2 signing flags may be set in SMB2 request */
38d77c50 756 if (ses->sign)
9cd2e62c 757 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
38d77c50 758 else if (global_secflags & CIFSSEC_MAY_SIGN)
9cd2e62c 759 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
38d77c50
JL		 760 else
761 req->SecurityMode = 0;
ec2e4523 762
e4aa25e7 763 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
ec2e4523 764
3c5f9be1
SF		 765 /* ClientGUID must be zero for SMB2.02 dialect */
766 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
767 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
ebb3a9d4 768 else {
3c5f9be1
SF		 769 memcpy(req->ClientGUID, server->client_guid,
770 SMB2_CLIENT_GUID_SIZE);
d5c7076b
SF		 771 if ((ses->server->vals->protocol_id == SMB311_PROT_ID) ||
772 (strcmp(ses->server->vals->version_string,
773 SMBDEFAULT_VERSION_STRING) == 0))
13cacea7 774 assemble_neg_contexts(req, &total_len);
ebb3a9d4 775 }
ec2e4523 776 iov[0].iov_base = (char *)req;
13cacea7 777 iov[0].iov_len = total_len;
ec2e4523 778
40eff45b
RS		 779 memset(&rqst, 0, sizeof(struct smb_rqst));
780 rqst.rq_iov = iov;
781 rqst.rq_nvec = 1;
782
783 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 784 cifs_small_buf_release(req);
785 rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base;
ec2e4523
PS		 786 /*
787 * No tcon so can't do
788 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
789 */
7e682f76
SF		 790 if (rc == -EOPNOTSUPP) {
791 cifs_dbg(VFS, "Dialect not supported by server. Consider "
9764c02f 792 "specifying vers=1.0 or vers=2.0 on mount for accessing"
7e682f76
SF		 793 " older servers\n");
794 goto neg_exit;
795 } else if (rc != 0)
ec2e4523
PS		 796 goto neg_exit;
797
9764c02f
SF		 798 if (strcmp(ses->server->vals->version_string,
799 SMB3ANY_VERSION_STRING) == 0) {
800 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
801 cifs_dbg(VFS,
802 "SMB2 dialect returned but not requested\n");
803 return -EIO;
804 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
805 cifs_dbg(VFS,
806 "SMB2.1 dialect returned but not requested\n");
807 return -EIO;
808 }
809 } else if (strcmp(ses->server->vals->version_string,
810 SMBDEFAULT_VERSION_STRING) == 0) {
811 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
812 cifs_dbg(VFS,
813 "SMB2 dialect returned but not requested\n");
814 return -EIO;
815 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
816 /* ops set to 3.0 by default for default so update */
817 ses->server->ops = &smb21_operations;
d5c7076b
SF		 818 } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
819 ses->server->ops = &smb311_operations;
590d08d3
SF		 820 } else if (le16_to_cpu(rsp->DialectRevision) !=
821 ses->server->vals->protocol_id) {
9764c02f
SF		 822 /* if requested single dialect ensure returned dialect matched */
823 cifs_dbg(VFS, "Illegal 0x%x dialect returned: not requested\n",
590d08d3 824 le16_to_cpu(rsp->DialectRevision));
9764c02f
SF		 825 return -EIO;
826 }
827
f96637be 828 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
ec2e4523 829
e4aa25e7 830 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
f96637be 831 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
e4aa25e7 832 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
f96637be 833 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
e4aa25e7 834 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
f96637be 835 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
20b6d8b4
SF		 836 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
837 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
5f7fbf73
SF		 838 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
839 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
ec2e4523 840 else {
f799d623 841 cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
f96637be 842 le16_to_cpu(rsp->DialectRevision));
ec2e4523
PS		 843 rc = -EIO;
844 goto neg_exit;
845 }
846 server->dialect = le16_to_cpu(rsp->DialectRevision);
847
8bd68c6e
AA		 848 /*
849 * Keep a copy of the hash after negprot. This hash will be
850 * the starting hash value for all sessions made from this
851 * server.
852 */
853 memcpy(server->preauth_sha_hash, ses->preauth_sha_hash,
854 SMB2_PREAUTH_HASH_SIZE);
0fdfef9a 855
e598d1d8
JL		 856 /* SMB2 only has an extended negflavor */
857 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
2365c4ea
PS		 858 /* set it to the maximum buffer size value we can send with 1 credit */
859 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
860 SMB2_MAX_BUFFER_SIZE);
ec2e4523
PS		 861 server->max_read = le32_to_cpu(rsp->MaxReadSize);
862 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
ec2e4523 863 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
07108d0e
SF		 864 if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode)
865 cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n",
866 server->sec_mode);
ec2e4523 867 server->capabilities = le32_to_cpu(rsp->Capabilities);
29e20f9c
PS		 868 /* Internal types */
869 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
ec2e4523
PS		 870
871 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
49f466bd 872 (struct smb2_sync_hdr *)rsp);
5d875cc9
SF		 873 /*
874 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
875 * for us will be
876 * ses->sectype = RawNTLMSSP;
877 * but for time being this is our only auth choice so doesn't matter.
878 * We just found a server which sets blob length to zero expecting raw.
879 */
67dbea2c 880 if (blob_length == 0) {
5d875cc9 881 cifs_dbg(FYI, "missing security blob on negprot\n");
67dbea2c
PS		 882 server->sec_ntlmssp = true;
883 }
3c1bf7e4 884
38d77c50 885 rc = cifs_enable_signing(server, ses->sign);
9ddec561
JL		 886 if (rc)
887 goto neg_exit;
ceb1b0b9 888 if (blob_length) {
ebdd207e 889 rc = decode_negTokenInit(security_blob, blob_length, server);
ceb1b0b9
SF		 890 if (rc == 1)
891 rc = 0;
892 else if (rc == 0)
893 rc = -EIO;
ec2e4523 894 }
5100d8a3 895
5100d8a3
SF		 896 if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
897 if (rsp->NegotiateContextCount)
977b6170
RS		 898 rc = smb311_decode_neg_context(rsp, server,
899 rsp_iov.iov_len);
5100d8a3
SF		 900 else
901 cifs_dbg(VFS, "Missing expected negotiate contexts\n");
902 }
ec2e4523
PS		 903neg_exit:
904 free_rsp_buf(resp_buftype, rsp);
905 return rc;
906}
5478f9ba 907
ff1c038a
SF		 908int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
909{
2796d303
LL		 910 int rc;
911 struct validate_negotiate_info_req *pneg_inbuf;
fe83bebc 912 struct validate_negotiate_info_rsp *pneg_rsp = NULL;
ff1c038a 913 u32 rsplen;
9764c02f 914 u32 inbuflen; /* max of 4 dialects */
ff1c038a
SF		 915
916 cifs_dbg(FYI, "validate negotiate\n");
917
8bd68c6e
AA		 918 /* In SMB3.11 preauth integrity supersedes validate negotiate */
919 if (tcon->ses->server->dialect == SMB311_PROT_ID)
920 return 0;
921
ff1c038a
SF		 922 /*
923 * validation ioctl must be signed, so no point sending this if we
0603c96f
SF		 924 * can not sign it (ie are not known user). Even if signing is not
925 * required (enabled but not negotiated), in those cases we selectively
ff1c038a 926 * sign just this, the first and only signed request on a connection.
0603c96f 927 * Having validation of negotiate info helps reduce attack vectors.
ff1c038a 928 */
0603c96f 929 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
ff1c038a
SF		 930 return 0; /* validation requires signing */
931
0603c96f
SF		 932 if (tcon->ses->user_name == NULL) {
933 cifs_dbg(FYI, "Can't validate negotiate: null user mount\n");
934 return 0; /* validation requires signing */
935 }
936
937 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
938 cifs_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n");
939
2796d303
LL		 940 pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS);
941 if (!pneg_inbuf)
942 return -ENOMEM;
943
944 pneg_inbuf->Capabilities =
ff1c038a 945 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
2796d303 946 memcpy(pneg_inbuf->Guid, tcon->ses->server->client_guid,
39552ea8 947 SMB2_CLIENT_GUID_SIZE);
ff1c038a
SF		 948
949 if (tcon->ses->sign)
2796d303 950 pneg_inbuf->SecurityMode =
ff1c038a
SF		 951 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
952 else if (global_secflags & CIFSSEC_MAY_SIGN)
2796d303 953 pneg_inbuf->SecurityMode =
ff1c038a
SF		 954 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
955 else
2796d303 956 pneg_inbuf->SecurityMode = 0;
ff1c038a 957
9764c02f
SF		 958
959 if (strcmp(tcon->ses->server->vals->version_string,
960 SMB3ANY_VERSION_STRING) == 0) {
2796d303
LL		 961 pneg_inbuf->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
962 pneg_inbuf->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
963 pneg_inbuf->DialectCount = cpu_to_le16(2);
9764c02f 964 /* structure is big enough for 3 dialects, sending only 2 */
2796d303 965 inbuflen = sizeof(*pneg_inbuf) -
d5c7076b 966 (2 * sizeof(pneg_inbuf->Dialects[0]));
9764c02f
SF		 967 } else if (strcmp(tcon->ses->server->vals->version_string,
968 SMBDEFAULT_VERSION_STRING) == 0) {
2796d303
LL		 969 pneg_inbuf->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
970 pneg_inbuf->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
971 pneg_inbuf->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
d5c7076b
SF		 972 pneg_inbuf->Dialects[3] = cpu_to_le16(SMB311_PROT_ID);
973 pneg_inbuf->DialectCount = cpu_to_le16(4);
9764c02f 974 /* structure is big enough for 3 dialects */
2796d303 975 inbuflen = sizeof(*pneg_inbuf);
9764c02f
SF		 976 } else {
977 /* otherwise specific dialect was requested */
2796d303 978 pneg_inbuf->Dialects[0] =
9764c02f 979 cpu_to_le16(tcon->ses->server->vals->protocol_id);
2796d303 980 pneg_inbuf->DialectCount = cpu_to_le16(1);
9764c02f 981 /* structure is big enough for 3 dialects, sending only 1 */
2796d303
LL		 982 inbuflen = sizeof(*pneg_inbuf) -
983 sizeof(pneg_inbuf->Dialects[0]) * 2;
9764c02f 984 }
ff1c038a
SF		 985
986 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
987 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
2796d303 988 (char *)pneg_inbuf, inbuflen, (char **)&pneg_rsp, &rsplen);
ff1c038a
SF		 989
990 if (rc != 0) {
991 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
2796d303
LL		 992 rc = -EIO;
993 goto out_free_inbuf;
ff1c038a
SF		 994 }
995
2796d303
LL		 996 rc = -EIO;
997 if (rsplen != sizeof(*pneg_rsp)) {
7db0a6ef
SF		 998 cifs_dbg(VFS, "invalid protocol negotiate response size: %d\n",
999 rsplen);
1000
1001 /* relax check since Mac returns max bufsize allowed on ioctl */
2796d303
LL		 1002 if (rsplen > CIFSMaxBufSize || rsplen < sizeof(*pneg_rsp))
1003 goto out_free_rsp;
ff1c038a
SF		 1004 }
1005
1006 /* check validate negotiate info response matches what we got earlier */
9aca7e45 1007 if (pneg_rsp->Dialect != cpu_to_le16(tcon->ses->server->dialect))
ff1c038a
SF		 1008 goto vneg_out;
1009
1010 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
1011 goto vneg_out;
1012
1013 /* do not validate server guid because not saved at negprot time yet */
1014
1015 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
1016 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
1017 goto vneg_out;
1018
1019 /* validate negotiate successful */
2796d303 1020 rc = 0;
ff1c038a 1021 cifs_dbg(FYI, "validate negotiate info successful\n");
2796d303 1022 goto out_free_rsp;
ff1c038a
SF		 1023
1024vneg_out:
1025 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
2796d303 1026out_free_rsp:
fe83bebc 1027 kfree(pneg_rsp);
2796d303
LL		 1028out_free_inbuf:
1029 kfree(pneg_inbuf);
1030 return rc;
ff1c038a
SF		 1031}
1032
ef65aaed
SP		 1033enum securityEnum
1034smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
1035{
1036 switch (requested) {
1037 case Kerberos:
1038 case RawNTLMSSP:
1039 return requested;
1040 case NTLMv2:
1041 return RawNTLMSSP;
1042 case Unspecified:
1043 if (server->sec_ntlmssp &&
1044 (global_secflags & CIFSSEC_MAY_NTLMSSP))
1045 return RawNTLMSSP;
1046 if ((server->sec_kerberos || server->sec_mskerberos) &&
1047 (global_secflags & CIFSSEC_MAY_KRB5))
1048 return Kerberos;
1049 /* Fallthrough */
1050 default:
1051 return Unspecified;
1052 }
1053}
1054
3baf1a7b
SP		 1055struct SMB2_sess_data {
1056 unsigned int xid;
1057 struct cifs_ses *ses;
1058 struct nls_table *nls_cp;
1059 void (*func)(struct SMB2_sess_data *);
1060 int result;
1061 u64 previous_session;
1062
1063 /* we will send the SMB in three pieces:
1064 * a fixed length beginning part, an optional
1065 * SPNEGO blob (which can be zero length), and a
1066 * last part which will include the strings
1067 * and rest of bcc area. This allows us to avoid
1068 * a large buffer 17K allocation
1069 */
1070 int buf0_type;
1071 struct kvec iov[2];
1072};
1073
1074static int
1075SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
1076{
1077 int rc;
1078 struct cifs_ses *ses = sess_data->ses;
1079 struct smb2_sess_setup_req *req;
1080 struct TCP_Server_Info *server = ses->server;
88ea5cb7 1081 unsigned int total_len;
3baf1a7b 1082
88ea5cb7
RS		 1083 rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, (void **) &req,
1084 &total_len);
3baf1a7b
SP		 1085 if (rc)
1086 return rc;
1087
31473fc4 1088 /* First session, not a reauthenticate */
88ea5cb7 1089 req->sync_hdr.SessionId = 0;
3baf1a7b
SP		 1090
1091 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
1092 req->PreviousSessionId = sess_data->previous_session;
1093
1094 req->Flags = 0; /* MBZ */
d409014e
SF		 1095
1096 /* enough to enable echos and oplocks and one max size write */
1097 req->sync_hdr.CreditRequest = cpu_to_le16(130);
3baf1a7b
SP		 1098
1099 /* only one of SMB2 signing flags may be set in SMB2 request */
1100 if (server->sign)
1101 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
1102 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
1103 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
1104 else
1105 req->SecurityMode = 0;
1106
1107 req->Capabilities = 0;
1108 req->Channel = 0; /* MBZ */
1109
1110 sess_data->iov[0].iov_base = (char *)req;
88ea5cb7
RS		 1111 /* 1 for pad */
1112 sess_data->iov[0].iov_len = total_len - 1;
3baf1a7b
SP		 1113 /*
1114 * This variable will be used to clear the buffer
1115 * allocated above in case of any error in the calling function.
1116 */
1117 sess_data->buf0_type = CIFS_SMALL_BUFFER;
1118
1119 return 0;
1120}
1121
1122static void
1123SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
1124{
1125 free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
1126 sess_data->buf0_type = CIFS_NO_BUFFER;
1127}
1128
1129static int
1130SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
1131{
1132 int rc;
40eff45b 1133 struct smb_rqst rqst;
3baf1a7b 1134 struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
da502f7d 1135 struct kvec rsp_iov = { NULL, 0 };
3baf1a7b
SP		 1136
1137 /* Testing shows that buffer offset must be at location of Buffer[0] */
1138 req->SecurityBufferOffset =
88ea5cb7 1139 cpu_to_le16(sizeof(struct smb2_sess_setup_req) - 1 /* pad */);
3baf1a7b
SP		 1140 req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
1141
40eff45b
RS		 1142 memset(&rqst, 0, sizeof(struct smb_rqst));
1143 rqst.rq_iov = sess_data->iov;
1144 rqst.rq_nvec = 2;
3baf1a7b 1145
40eff45b
RS		 1146 /* BB add code to build os and lm fields */
1147 rc = cifs_send_recv(sess_data->xid, sess_data->ses,
1148 &rqst,
88ea5cb7
RS		 1149 &sess_data->buf0_type,
1150 CIFS_LOG_ERROR | CIFS_NEG_OP, &rsp_iov);
da502f7d
PS		 1151 cifs_small_buf_release(sess_data->iov[0].iov_base);
1152 memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
3baf1a7b
SP		 1153
1154 return rc;
1155}
1156
1157static int
1158SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
1159{
1160 int rc = 0;
1161 struct cifs_ses *ses = sess_data->ses;
1162
1163 mutex_lock(&ses->server->srv_mutex);
cabfb368 1164 if (ses->server->ops->generate_signingkey) {
3baf1a7b 1165 rc = ses->server->ops->generate_signingkey(ses);
3baf1a7b
SP		 1166 if (rc) {
1167 cifs_dbg(FYI,
1168 "SMB3 session key generation failed\n");
1169 mutex_unlock(&ses->server->srv_mutex);
cabfb368 1170 return rc;
3baf1a7b
SP		 1171 }
1172 }
1173 if (!ses->server->session_estab) {
1174 ses->server->sequence_number = 0x2;
1175 ses->server->session_estab = true;
1176 }
1177 mutex_unlock(&ses->server->srv_mutex);
1178
1179 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
1180 spin_lock(&GlobalMid_Lock);
1181 ses->status = CifsGood;
1182 ses->need_reconnect = false;
1183 spin_unlock(&GlobalMid_Lock);
3baf1a7b
SP		 1184 return rc;
1185}
1186
1187#ifdef CONFIG_CIFS_UPCALL
1188static void
1189SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1190{
1191 int rc;
1192 struct cifs_ses *ses = sess_data->ses;
1193 struct cifs_spnego_msg *msg;
1194 struct key *spnego_key = NULL;
1195 struct smb2_sess_setup_rsp *rsp = NULL;
1196
1197 rc = SMB2_sess_alloc_buffer(sess_data);
1198 if (rc)
1199 goto out;
1200
1201 spnego_key = cifs_get_spnego_key(ses);
1202 if (IS_ERR(spnego_key)) {
1203 rc = PTR_ERR(spnego_key);
1204 spnego_key = NULL;
1205 goto out;
1206 }
1207
1208 msg = spnego_key->payload.data[0];
1209 /*
1210 * check version field to make sure that cifs.upcall is
1211 * sending us a response in an expected form
1212 */
1213 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
1214 cifs_dbg(VFS,
1215 "bad cifs.upcall version. Expected %d got %d",
1216 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
1217 rc = -EKEYREJECTED;
1218 goto out_put_spnego_key;
1219 }
1220
1221 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
1222 GFP_KERNEL);
1223 if (!ses->auth_key.response) {
1224 cifs_dbg(VFS,
1225 "Kerberos can't allocate (%u bytes) memory",
1226 msg->sesskey_len);
1227 rc = -ENOMEM;
1228 goto out_put_spnego_key;
1229 }
1230 ses->auth_key.len = msg->sesskey_len;
1231
1232 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
1233 sess_data->iov[1].iov_len = msg->secblob_len;
1234
1235 rc = SMB2_sess_sendreceive(sess_data);
1236 if (rc)
1237 goto out_put_spnego_key;
1238
1239 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
49f466bd 1240 ses->Suid = rsp->sync_hdr.SessionId;
3baf1a7b
SP		 1241
1242 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
3baf1a7b
SP		 1243
1244 rc = SMB2_sess_establish_session(sess_data);
1245out_put_spnego_key:
1246 key_invalidate(spnego_key);
1247 key_put(spnego_key);
1248out:
1249 sess_data->result = rc;
1250 sess_data->func = NULL;
1251 SMB2_sess_free_buffer(sess_data);
1252}
1253#else
1254static void
1255SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1256{
1257 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
1258 sess_data->result = -EOPNOTSUPP;
1259 sess_data->func = NULL;
1260}
1261#endif
1262
166cea4d
SP		 1263static void
1264SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
1265
1266static void
1267SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
5478f9ba 1268{
166cea4d
SP		 1269 int rc;
1270 struct cifs_ses *ses = sess_data->ses;
5478f9ba 1271 struct smb2_sess_setup_rsp *rsp = NULL;
166cea4d 1272 char *ntlmssp_blob = NULL;
5478f9ba 1273 bool use_spnego = false; /* else use raw ntlmssp */
166cea4d 1274 u16 blob_length = 0;
d4e63bd6 1275
5478f9ba
PS		 1276 /*
1277 * If memory allocation is successful, caller of this function
1278 * frees it.
1279 */
1280 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
166cea4d
SP		 1281 if (!ses->ntlmssp) {
1282 rc = -ENOMEM;
1283 goto out_err;
1284 }
5c234aa5 1285 ses->ntlmssp->sesskey_per_smbsess = true;
5478f9ba 1286
166cea4d 1287 rc = SMB2_sess_alloc_buffer(sess_data);
5478f9ba 1288 if (rc)
166cea4d 1289 goto out_err;
5478f9ba 1290
166cea4d
SP		 1291 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
1292 GFP_KERNEL);
1293 if (ntlmssp_blob == NULL) {
1294 rc = -ENOMEM;
1295 goto out;
1296 }
c2afb814 1297
166cea4d
SP		 1298 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
1299 if (use_spnego) {
1300 /* BB eventually need to add this */
1301 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1302 rc = -EOPNOTSUPP;
1303 goto out;
1304 } else {
1305 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
1306 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
1307 }
1308 sess_data->iov[1].iov_base = ntlmssp_blob;
1309 sess_data->iov[1].iov_len = blob_length;
c2afb814 1310
166cea4d
SP		 1311 rc = SMB2_sess_sendreceive(sess_data);
1312 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
5478f9ba 1313
166cea4d
SP		 1314 /* If true, rc here is expected and not an error */
1315 if (sess_data->buf0_type != CIFS_NO_BUFFER &&
49f466bd 1316 rsp->sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
166cea4d 1317 rc = 0;
38d77c50 1318
166cea4d
SP		 1319 if (rc)
1320 goto out;
5478f9ba 1321
1fc6ad2f 1322 if (offsetof(struct smb2_sess_setup_rsp, Buffer) !=
166cea4d
SP		 1323 le16_to_cpu(rsp->SecurityBufferOffset)) {
1324 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
1325 le16_to_cpu(rsp->SecurityBufferOffset));
5478f9ba 1326 rc = -EIO;
166cea4d 1327 goto out;
5478f9ba 1328 }
166cea4d
SP		 1329 rc = decode_ntlmssp_challenge(rsp->Buffer,
1330 le16_to_cpu(rsp->SecurityBufferLength), ses);
1331 if (rc)
1332 goto out;
5478f9ba 1333
166cea4d 1334 cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
5478f9ba 1335
5478f9ba 1336
49f466bd 1337 ses->Suid = rsp->sync_hdr.SessionId;
166cea4d 1338 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
166cea4d
SP		 1339
1340out:
1341 kfree(ntlmssp_blob);
1342 SMB2_sess_free_buffer(sess_data);
1343 if (!rc) {
1344 sess_data->result = 0;
1345 sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
1346 return;
1347 }
1348out_err:
1349 kfree(ses->ntlmssp);
1350 ses->ntlmssp = NULL;
1351 sess_data->result = rc;
1352 sess_data->func = NULL;
1353}
5478f9ba 1354
166cea4d
SP		 1355static void
1356SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
1357{
1358 int rc;
1359 struct cifs_ses *ses = sess_data->ses;
1360 struct smb2_sess_setup_req *req;
1361 struct smb2_sess_setup_rsp *rsp = NULL;
1362 unsigned char *ntlmssp_blob = NULL;
1363 bool use_spnego = false; /* else use raw ntlmssp */
1364 u16 blob_length = 0;
5478f9ba 1365
166cea4d
SP		 1366 rc = SMB2_sess_alloc_buffer(sess_data);
1367 if (rc)
1368 goto out;
5478f9ba 1369
166cea4d 1370 req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
88ea5cb7 1371 req->sync_hdr.SessionId = ses->Suid;
166cea4d
SP		 1372
1373 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
1374 sess_data->nls_cp);
1375 if (rc) {
1376 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
1377 goto out;
5478f9ba
PS		 1378 }
1379
166cea4d
SP		 1380 if (use_spnego) {
1381 /* BB eventually need to add this */
1382 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1383 rc = -EOPNOTSUPP;
1384 goto out;
1385 }
1386 sess_data->iov[1].iov_base = ntlmssp_blob;
1387 sess_data->iov[1].iov_len = blob_length;
5478f9ba 1388
166cea4d
SP		 1389 rc = SMB2_sess_sendreceive(sess_data);
1390 if (rc)
1391 goto out;
1392
1393 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1394
49f466bd 1395 ses->Suid = rsp->sync_hdr.SessionId;
5478f9ba 1396 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
5478f9ba 1397
166cea4d
SP		 1398 rc = SMB2_sess_establish_session(sess_data);
1399out:
1400 kfree(ntlmssp_blob);
1401 SMB2_sess_free_buffer(sess_data);
1402 kfree(ses->ntlmssp);
1403 ses->ntlmssp = NULL;
1404 sess_data->result = rc;
1405 sess_data->func = NULL;
1406}
d4e63bd6 1407
166cea4d
SP		 1408static int
1409SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data)
1410{
ef65aaed
SP		 1411 int type;
1412
1413 type = smb2_select_sectype(ses->server, ses->sectype);
1414 cifs_dbg(FYI, "sess setup type %d\n", type);
1415 if (type == Unspecified) {
1416 cifs_dbg(VFS,
1417 "Unable to select appropriate authentication method!");
1418 return -EINVAL;
1419 }
d4e63bd6 1420
ef65aaed 1421 switch (type) {
166cea4d
SP		 1422 case Kerberos:
1423 sess_data->func = SMB2_auth_kerberos;
1424 break;
1425 case RawNTLMSSP:
1426 sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
1427 break;
1428 default:
ef65aaed 1429 cifs_dbg(VFS, "secType %d not supported!\n", type);
166cea4d 1430 return -EOPNOTSUPP;
d4e63bd6
SP		 1431 }
1432
166cea4d
SP		 1433 return 0;
1434}
1435
1436int
1437SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
1438 const struct nls_table *nls_cp)
1439{
1440 int rc = 0;
1441 struct TCP_Server_Info *server = ses->server;
1442 struct SMB2_sess_data *sess_data;
1443
1444 cifs_dbg(FYI, "Session Setup\n");
1445
1446 if (!server) {
1447 WARN(1, "%s: server is NULL!\n", __func__);
1448 return -EIO;
d4e63bd6 1449 }
d4e63bd6 1450
166cea4d
SP		 1451 sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
1452 if (!sess_data)
1453 return -ENOMEM;
1454
1455 rc = SMB2_select_sec(ses, sess_data);
1456 if (rc)
1457 goto out;
1458 sess_data->xid = xid;
1459 sess_data->ses = ses;
1460 sess_data->buf0_type = CIFS_NO_BUFFER;
1461 sess_data->nls_cp = (struct nls_table *) nls_cp;
b2adf22f 1462 sess_data->previous_session = ses->Suid;
166cea4d 1463
8bd68c6e
AA		 1464 /*
1465 * Initialize the session hash with the server one.
1466 */
1467 memcpy(ses->preauth_sha_hash, ses->server->preauth_sha_hash,
1468 SMB2_PREAUTH_HASH_SIZE);
8bd68c6e 1469
166cea4d
SP		 1470 while (sess_data->func)
1471 sess_data->func(sess_data);
1472
c721c389
SF		 1473 if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign))
1474 cifs_dbg(VFS, "signing requested but authenticated as guest\n");
3baf1a7b 1475 rc = sess_data->result;
166cea4d 1476out:
3baf1a7b 1477 kfree(sess_data);
5478f9ba
PS		 1478 return rc;
1479}
1480
1481int
1482SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
1483{
40eff45b 1484 struct smb_rqst rqst;
5478f9ba
PS		 1485 struct smb2_logoff_req *req; /* response is also trivial struct */
1486 int rc = 0;
1487 struct TCP_Server_Info *server;
7fb8986e 1488 int flags = 0;
45305eda
RS		 1489 unsigned int total_len;
1490 struct kvec iov[1];
1491 struct kvec rsp_iov;
1492 int resp_buf_type;
5478f9ba 1493
f96637be 1494 cifs_dbg(FYI, "disconnect session %p\n", ses);
5478f9ba
PS		 1495
1496 if (ses && (ses->server))
1497 server = ses->server;
1498 else
1499 return -EIO;
1500
eb4c7df6
SP		 1501 /* no need to send SMB logoff if uid already closed due to reconnect */
1502 if (ses->need_reconnect)
1503 goto smb2_session_already_dead;
1504
45305eda 1505 rc = smb2_plain_req_init(SMB2_LOGOFF, NULL, (void **) &req, &total_len);
5478f9ba
PS		 1506 if (rc)
1507 return rc;
1508
1509 /* since no tcon, smb2_init can not do this, so do here */
45305eda 1510 req->sync_hdr.SessionId = ses->Suid;
7fb8986e
PS		 1511
1512 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
1513 flags |= CIFS_TRANSFORM_REQ;
1514 else if (server->sign)
45305eda
RS		 1515 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1516
1517 flags |= CIFS_NO_RESP;
1518
1519 iov[0].iov_base = (char *)req;
1520 iov[0].iov_len = total_len;
5478f9ba 1521
40eff45b
RS		 1522 memset(&rqst, 0, sizeof(struct smb_rqst));
1523 rqst.rq_iov = iov;
1524 rqst.rq_nvec = 1;
1525
1526 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
da502f7d 1527 cifs_small_buf_release(req);
5478f9ba
PS		 1528 /*
1529 * No tcon so can't do
1530 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1531 */
eb4c7df6
SP		 1532
1533smb2_session_already_dead:
5478f9ba
PS		 1534 return rc;
1535}
faaf946a
PS		 1536
1537static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
1538{
d60622eb 1539 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
faaf946a
PS		 1540}
1541
1542#define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1543
de9f68df
SF		 1544/* These are similar values to what Windows uses */
1545static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
1546{
1547 tcon->max_chunks = 256;
1548 tcon->max_bytes_chunk = 1048576;
1549 tcon->max_bytes_copy = 16777216;
1550}
1551
faaf946a
PS		 1552int
1553SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
1554 struct cifs_tcon *tcon, const struct nls_table *cp)
1555{
40eff45b 1556 struct smb_rqst rqst;
faaf946a
PS		 1557 struct smb2_tree_connect_req *req;
1558 struct smb2_tree_connect_rsp *rsp = NULL;
1559 struct kvec iov[2];
db3b5474 1560 struct kvec rsp_iov = { NULL, 0 };
faaf946a
PS		 1561 int rc = 0;
1562 int resp_buftype;
1563 int unc_path_len;
faaf946a 1564 __le16 *unc_path = NULL;
7fb8986e 1565 int flags = 0;
661bb943 1566 unsigned int total_len;
faaf946a 1567
f96637be 1568 cifs_dbg(FYI, "TCON\n");
faaf946a 1569
68a6afa7 1570 if (!(ses->server) || !tree)
faaf946a
PS		 1571 return -EIO;
1572
faaf946a
PS		 1573 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
1574 if (unc_path == NULL)
1575 return -ENOMEM;
1576
1577 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
1578 unc_path_len *= 2;
1579 if (unc_path_len < 2) {
1580 kfree(unc_path);
1581 return -EINVAL;
1582 }
1583
806a28ef 1584 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
b327a717 1585 tcon->tid = 0;
fae8044c 1586 atomic_set(&tcon->num_remote_opens, 0);
661bb943
RS		 1587 rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, (void **) &req,
1588 &total_len);
faaf946a
PS		 1589 if (rc) {
1590 kfree(unc_path);
1591 return rc;
1592 }
1593
5a77e75f 1594 if (smb3_encryption_required(tcon))
ae6f8dd4 1595 flags |= CIFS_TRANSFORM_REQ;
faaf946a
PS		 1596
1597 iov[0].iov_base = (char *)req;
661bb943
RS		 1598 /* 1 for pad */
1599 iov[0].iov_len = total_len - 1;
faaf946a
PS		 1600
1601 /* Testing shows that buffer offset must be at location of Buffer[0] */
1602 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
661bb943 1603 - 1 /* pad */);
faaf946a
PS		 1604 req->PathLength = cpu_to_le16(unc_path_len - 2);
1605 iov[1].iov_base = unc_path;
1606 iov[1].iov_len = unc_path_len;
1607
6188f28b
SF		 1608 /* 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 */
1609 if ((ses->server->dialect == SMB311_PROT_ID) &&
5a77e75f 1610 !smb3_encryption_required(tcon))
6188f28b
SF		 1611 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1612
40eff45b
RS		 1613 memset(&rqst, 0, sizeof(struct smb_rqst));
1614 rqst.rq_iov = iov;
1615 rqst.rq_nvec = 2;
1616
1617 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1618 cifs_small_buf_release(req);
1619 rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
f8af49dd 1620 trace_smb3_tcon(xid, tcon->tid, ses->Suid, tree, rc);
faaf946a
PS		 1621 if (rc != 0) {
1622 if (tcon) {
1623 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
1624 tcon->need_reconnect = true;
1625 }
1626 goto tcon_error_exit;
1627 }
1628
cd123007
CJ		 1629 switch (rsp->ShareType) {
1630 case SMB2_SHARE_TYPE_DISK:
f96637be 1631 cifs_dbg(FYI, "connection to disk share\n");
cd123007
CJ		 1632 break;
1633 case SMB2_SHARE_TYPE_PIPE:
b327a717 1634 tcon->pipe = true;
f96637be 1635 cifs_dbg(FYI, "connection to pipe share\n");
cd123007
CJ		 1636 break;
1637 case SMB2_SHARE_TYPE_PRINT:
b327a717 1638 tcon->print = true;
f96637be 1639 cifs_dbg(FYI, "connection to printer\n");
cd123007
CJ		 1640 break;
1641 default:
f96637be 1642 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
faaf946a
PS		 1643 rc = -EOPNOTSUPP;
1644 goto tcon_error_exit;
1645 }
1646
1647 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
769ee6a4 1648 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
faaf946a
PS		 1649 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1650 tcon->tidStatus = CifsGood;
1651 tcon->need_reconnect = false;
49f466bd 1652 tcon->tid = rsp->sync_hdr.TreeId;
46b51d08 1653 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
faaf946a
PS		 1654
1655 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1656 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
f96637be 1657 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
ae6f8dd4
PS		 1658
1659 if (tcon->seal &&
1660 !(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
1661 cifs_dbg(VFS, "Encryption is requested but not supported\n");
1662
de9f68df 1663 init_copy_chunk_defaults(tcon);
ff1c038a
SF		 1664 if (tcon->ses->server->ops->validate_negotiate)
1665 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
faaf946a 1666tcon_exit:
f8af49dd 1667
faaf946a
PS		 1668 free_rsp_buf(resp_buftype, rsp);
1669 kfree(unc_path);
1670 return rc;
1671
1672tcon_error_exit:
49f466bd 1673 if (rsp && rsp->sync_hdr.Status == STATUS_BAD_NETWORK_NAME) {
f96637be 1674 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
faaf946a
PS		 1675 }
1676 goto tcon_exit;
1677}
1678
1679int
1680SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1681{
40eff45b 1682 struct smb_rqst rqst;
faaf946a
PS		 1683 struct smb2_tree_disconnect_req *req; /* response is trivial */
1684 int rc = 0;
faaf946a 1685 struct cifs_ses *ses = tcon->ses;
7fb8986e 1686 int flags = 0;
4eecf4cf
RS		 1687 unsigned int total_len;
1688 struct kvec iov[1];
1689 struct kvec rsp_iov;
1690 int resp_buf_type;
faaf946a 1691
f96637be 1692 cifs_dbg(FYI, "Tree Disconnect\n");
faaf946a 1693
68a6afa7 1694 if (!ses || !(ses->server))
faaf946a
PS		 1695 return -EIO;
1696
1697 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1698 return 0;
1699
4eecf4cf
RS		 1700 rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req,
1701 &total_len);
faaf946a
PS		 1702 if (rc)
1703 return rc;
1704
5a77e75f 1705 if (smb3_encryption_required(tcon))
7fb8986e
PS		 1706 flags |= CIFS_TRANSFORM_REQ;
1707
4eecf4cf
RS		 1708 flags |= CIFS_NO_RESP;
1709
1710 iov[0].iov_base = (char *)req;
1711 iov[0].iov_len = total_len;
1712
40eff45b
RS		 1713 memset(&rqst, 0, sizeof(struct smb_rqst));
1714 rqst.rq_iov = iov;
1715 rqst.rq_nvec = 1;
1716
1717 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
da502f7d 1718 cifs_small_buf_release(req);
faaf946a
PS		 1719 if (rc)
1720 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1721
1722 return rc;
1723}
2503a0db 1724
b8c32dbb 1725
63eb3def
PS		 1726static struct create_durable *
1727create_durable_buf(void)
1728{
1729 struct create_durable *buf;
1730
1731 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1732 if (!buf)
1733 return NULL;
1734
1735 buf->ccontext.DataOffset = cpu_to_le16(offsetof
9cbc0b73 1736 (struct create_durable, Data));
63eb3def
PS		 1737 buf->ccontext.DataLength = cpu_to_le32(16);
1738 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1739 (struct create_durable, Name));
1740 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 1741 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
63eb3def
PS		 1742 buf->Name[0] = 'D';
1743 buf->Name[1] = 'H';
1744 buf->Name[2] = 'n';
1745 buf->Name[3] = 'Q';
1746 return buf;
1747}
1748
9cbc0b73
PS		 1749static struct create_durable *
1750create_reconnect_durable_buf(struct cifs_fid *fid)
1751{
1752 struct create_durable *buf;
1753
1754 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1755 if (!buf)
1756 return NULL;
1757
1758 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1759 (struct create_durable, Data));
1760 buf->ccontext.DataLength = cpu_to_le32(16);
1761 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1762 (struct create_durable, Name));
1763 buf->ccontext.NameLength = cpu_to_le16(4);
1764 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1765 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
12197a7f 1766 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
9cbc0b73
PS		 1767 buf->Name[0] = 'D';
1768 buf->Name[1] = 'H';
1769 buf->Name[2] = 'n';
1770 buf->Name[3] = 'C';
1771 return buf;
1772}
1773
b8c32dbb 1774static __u8
42873b0a 1775parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
96164ab2 1776 unsigned int *epoch, char *lease_key)
b8c32dbb
PS		 1777{
1778 char *data_offset;
b5c7cde3 1779 struct create_context *cc;
deb7deff
JM		 1780 unsigned int next;
1781 unsigned int remaining;
fd554396 1782 char *name;
b8c32dbb 1783
1fc6ad2f 1784 data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset);
deb7deff 1785 remaining = le32_to_cpu(rsp->CreateContextsLength);
b5c7cde3 1786 cc = (struct create_context *)data_offset;
deb7deff 1787 while (remaining >= sizeof(struct create_context)) {
b5c7cde3 1788 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
deb7deff
JM		 1789 if (le16_to_cpu(cc->NameLength) == 4 &&
1790 strncmp(name, "RqLs", 4) == 0)
96164ab2
RS		 1791 return server->ops->parse_lease_buf(cc, epoch,
1792 lease_key);
deb7deff
JM		 1793
1794 next = le32_to_cpu(cc->Next);
1795 if (!next)
1796 break;
1797 remaining -= next;
1798 cc = (struct create_context *)((char *)cc + next);
1799 }
b8c32dbb 1800
b5c7cde3 1801 return 0;
b8c32dbb
PS		 1802}
1803
d22cbfec 1804static int
a41a28bd 1805add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
729c0c9d 1806 unsigned int *num_iovec, u8 *lease_key, __u8 *oplock)
d22cbfec
PS		 1807{
1808 struct smb2_create_req *req = iov[0].iov_base;
1809 unsigned int num = *num_iovec;
1810
729c0c9d 1811 iov[num].iov_base = server->ops->create_lease_buf(lease_key, *oplock);
d22cbfec
PS		 1812 if (iov[num].iov_base == NULL)
1813 return -ENOMEM;
a41a28bd 1814 iov[num].iov_len = server->vals->create_lease_size;
d22cbfec
PS		 1815 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1816 if (!req->CreateContextsOffset)
1817 req->CreateContextsOffset = cpu_to_le32(
4f33bc35 1818 sizeof(struct smb2_create_req) +
d22cbfec 1819 iov[num - 1].iov_len);
a41a28bd
PS		 1820 le32_add_cpu(&req->CreateContextsLength,
1821 server->vals->create_lease_size);
d22cbfec
PS		 1822 *num_iovec = num + 1;
1823 return 0;
1824}
1825
b56eae4d
SF		 1826static struct create_durable_v2 *
1827create_durable_v2_buf(struct cifs_fid *pfid)
1828{
1829 struct create_durable_v2 *buf;
1830
1831 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
1832 if (!buf)
1833 return NULL;
1834
1835 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1836 (struct create_durable_v2, dcontext));
1837 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
1838 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1839 (struct create_durable_v2, Name));
1840 buf->ccontext.NameLength = cpu_to_le16(4);
1841
1842 buf->dcontext.Timeout = 0; /* Should this be configurable by workload */
1843 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
fa70b87c 1844 generate_random_uuid(buf->dcontext.CreateGuid);
b56eae4d
SF		 1845 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
1846
1847 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1848 buf->Name[0] = 'D';
1849 buf->Name[1] = 'H';
1850 buf->Name[2] = '2';
1851 buf->Name[3] = 'Q';
1852 return buf;
1853}
1854
1855static struct create_durable_handle_reconnect_v2 *
1856create_reconnect_durable_v2_buf(struct cifs_fid *fid)
1857{
1858 struct create_durable_handle_reconnect_v2 *buf;
1859
1860 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
1861 GFP_KERNEL);
1862 if (!buf)
1863 return NULL;
1864
1865 buf->ccontext.DataOffset =
1866 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1867 dcontext));
1868 buf->ccontext.DataLength =
1869 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
1870 buf->ccontext.NameOffset =
1871 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1872 Name));
1873 buf->ccontext.NameLength = cpu_to_le16(4);
1874
1875 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
1876 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
1877 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1878 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
1879
1880 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1881 buf->Name[0] = 'D';
1882 buf->Name[1] = 'H';
1883 buf->Name[2] = '2';
1884 buf->Name[3] = 'C';
1885 return buf;
1886}
1887
63eb3def 1888static int
b56eae4d
SF		 1889add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
1890 struct cifs_open_parms *oparms)
1891{
1892 struct smb2_create_req *req = iov[0].iov_base;
1893 unsigned int num = *num_iovec;
1894
1895 iov[num].iov_base = create_durable_v2_buf(oparms->fid);
1896 if (iov[num].iov_base == NULL)
1897 return -ENOMEM;
1898 iov[num].iov_len = sizeof(struct create_durable_v2);
1899 if (!req->CreateContextsOffset)
1900 req->CreateContextsOffset =
4f33bc35 1901 cpu_to_le32(sizeof(struct smb2_create_req) +
b56eae4d
SF		 1902 iov[1].iov_len);
1903 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
b56eae4d
SF		 1904 *num_iovec = num + 1;
1905 return 0;
1906}
1907
1908static int
1909add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
9cbc0b73 1910 struct cifs_open_parms *oparms)
63eb3def
PS		 1911{
1912 struct smb2_create_req *req = iov[0].iov_base;
1913 unsigned int num = *num_iovec;
1914
b56eae4d
SF		 1915 /* indicate that we don't need to relock the file */
1916 oparms->reconnect = false;
1917
1918 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
1919 if (iov[num].iov_base == NULL)
1920 return -ENOMEM;
1921 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
1922 if (!req->CreateContextsOffset)
1923 req->CreateContextsOffset =
4f33bc35 1924 cpu_to_le32(sizeof(struct smb2_create_req) +
b56eae4d
SF		 1925 iov[1].iov_len);
1926 le32_add_cpu(&req->CreateContextsLength,
1927 sizeof(struct create_durable_handle_reconnect_v2));
b56eae4d
SF		 1928 *num_iovec = num + 1;
1929 return 0;
1930}
1931
1932static int
1933add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1934 struct cifs_open_parms *oparms, bool use_persistent)
1935{
1936 struct smb2_create_req *req = iov[0].iov_base;
1937 unsigned int num = *num_iovec;
1938
1939 if (use_persistent) {
1940 if (oparms->reconnect)
1941 return add_durable_reconnect_v2_context(iov, num_iovec,
1942 oparms);
1943 else
1944 return add_durable_v2_context(iov, num_iovec, oparms);
1945 }
1946
9cbc0b73
PS		 1947 if (oparms->reconnect) {
1948 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1949 /* indicate that we don't need to relock the file */
1950 oparms->reconnect = false;
1951 } else
1952 iov[num].iov_base = create_durable_buf();
63eb3def
PS		 1953 if (iov[num].iov_base == NULL)
1954 return -ENOMEM;
1955 iov[num].iov_len = sizeof(struct create_durable);
1956 if (!req->CreateContextsOffset)
1957 req->CreateContextsOffset =
4f33bc35 1958 cpu_to_le32(sizeof(struct smb2_create_req) +
63eb3def 1959 iov[1].iov_len);
31f92e9a 1960 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
63eb3def
PS		 1961 *num_iovec = num + 1;
1962 return 0;
1963}
1964
cdeaf9d0
SF		 1965/* See MS-SMB2 2.2.13.2.7 */
1966static struct crt_twarp_ctxt *
1967create_twarp_buf(__u64 timewarp)
1968{
1969 struct crt_twarp_ctxt *buf;
1970
1971 buf = kzalloc(sizeof(struct crt_twarp_ctxt), GFP_KERNEL);
1972 if (!buf)
1973 return NULL;
1974
1975 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1976 (struct crt_twarp_ctxt, Timestamp));
1977 buf->ccontext.DataLength = cpu_to_le32(8);
1978 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1979 (struct crt_twarp_ctxt, Name));
1980 buf->ccontext.NameLength = cpu_to_le16(4);
1981 /* SMB2_CREATE_TIMEWARP_TOKEN is "TWrp" */
1982 buf->Name[0] = 'T';
1983 buf->Name[1] = 'W';
1984 buf->Name[2] = 'r';
1985 buf->Name[3] = 'p';
1986 buf->Timestamp = cpu_to_le64(timewarp);
1987 return buf;
1988}
1989
1990/* See MS-SMB2 2.2.13.2.7 */
1991static int
1992add_twarp_context(struct kvec *iov, unsigned int *num_iovec, __u64 timewarp)
1993{
1994 struct smb2_create_req *req = iov[0].iov_base;
1995 unsigned int num = *num_iovec;
1996
1997 iov[num].iov_base = create_twarp_buf(timewarp);
1998 if (iov[num].iov_base == NULL)
1999 return -ENOMEM;
2000 iov[num].iov_len = sizeof(struct crt_twarp_ctxt);
2001 if (!req->CreateContextsOffset)
2002 req->CreateContextsOffset = cpu_to_le32(
2003 sizeof(struct smb2_create_req) +
2004 iov[num - 1].iov_len);
2005 le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_twarp_ctxt));
2006 *num_iovec = num + 1;
2007 return 0;
2008}
2009
f0712928
AA		 2010static int
2011alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
2012 const char *treename, const __le16 *path)
2013{
2014 int treename_len, path_len;
2015 struct nls_table *cp;
2016 const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
2017
2018 /*
2019 * skip leading "\\"
2020 */
2021 treename_len = strlen(treename);
2022 if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\'))
2023 return -EINVAL;
2024
2025 treename += 2;
2026 treename_len -= 2;
2027
2028 path_len = UniStrnlen((wchar_t *)path, PATH_MAX);
2029
2030 /*
2031 * make room for one path separator between the treename and
2032 * path
2033 */
2034 *out_len = treename_len + 1 + path_len;
2035
2036 /*
2037 * final path needs to be null-terminated UTF16 with a
2038 * size aligned to 8
2039 */
2040
2041 *out_size = roundup((*out_len+1)*2, 8);
2042 *out_path = kzalloc(*out_size, GFP_KERNEL);
2043 if (!*out_path)
2044 return -ENOMEM;
2045
2046 cp = load_nls_default();
2047 cifs_strtoUTF16(*out_path, treename, treename_len, cp);
2048 UniStrcat(*out_path, sep);
2049 UniStrcat(*out_path, path);
2050 unload_nls(cp);
2051
2052 return 0;
2053}
2054
bea851b8
SF		 2055int smb311_posix_mkdir(const unsigned int xid, struct inode *inode,
2056 umode_t mode, struct cifs_tcon *tcon,
2057 const char *full_path,
2058 struct cifs_sb_info *cifs_sb)
2059{
2060 struct smb_rqst rqst;
2061 struct smb2_create_req *req;
256b4c3f 2062 struct smb2_create_rsp *rsp = NULL;
bea851b8
SF		 2063 struct cifs_ses *ses = tcon->ses;
2064 struct kvec iov[3]; /* make sure at least one for each open context */
2065 struct kvec rsp_iov = {NULL, 0};
2066 int resp_buftype;
2067 int uni_path_len;
2068 __le16 *copy_path = NULL;
2069 int copy_size;
2070 int rc = 0;
2071 unsigned int n_iov = 2;
2072 __u32 file_attributes = 0;
2073 char *pc_buf = NULL;
2074 int flags = 0;
2075 unsigned int total_len;
256b4c3f 2076 __le16 *utf16_path = NULL;
bea851b8
SF		 2077
2078 cifs_dbg(FYI, "mkdir\n");
2079
256b4c3f
AA		 2080 /* resource #1: path allocation */
2081 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2082 if (!utf16_path)
2083 return -ENOMEM;
2084
29cbfa1b 2085 if (!ses || !(ses->server)) {
256b4c3f
AA		 2086 rc = -EIO;
2087 goto err_free_path;
2088 }
bea851b8 2089
256b4c3f 2090 /* resource #2: request */
bea851b8 2091 rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
bea851b8 2092 if (rc)
256b4c3f
AA		 2093 goto err_free_path;
2094
bea851b8
SF		 2095
2096 if (smb3_encryption_required(tcon))
2097 flags |= CIFS_TRANSFORM_REQ;
2098
bea851b8
SF		 2099 req->ImpersonationLevel = IL_IMPERSONATION;
2100 req->DesiredAccess = cpu_to_le32(FILE_WRITE_ATTRIBUTES);
2101 /* File attributes ignored on open (used in create though) */
2102 req->FileAttributes = cpu_to_le32(file_attributes);
2103 req->ShareAccess = FILE_SHARE_ALL_LE;
2104 req->CreateDisposition = cpu_to_le32(FILE_CREATE);
2105 req->CreateOptions = cpu_to_le32(CREATE_NOT_FILE);
2106
2107 iov[0].iov_base = (char *)req;
2108 /* -1 since last byte is buf[0] which is sent below (path) */
2109 iov[0].iov_len = total_len - 1;
2110
2111 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
2112
2113 /* [MS-SMB2] 2.2.13 NameOffset:
2114 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2115 * the SMB2 header, the file name includes a prefix that will
2116 * be processed during DFS name normalization as specified in
2117 * section 3.3.5.9. Otherwise, the file name is relative to
2118 * the share that is identified by the TreeId in the SMB2
2119 * header.
2120 */
2121 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
2122 int name_len;
2123
2124 req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
2125 rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
2126 &name_len,
256b4c3f
AA		 2127 tcon->treeName, utf16_path);
2128 if (rc)
2129 goto err_free_req;
2130
bea851b8
SF		 2131 req->NameLength = cpu_to_le16(name_len * 2);
2132 uni_path_len = copy_size;
256b4c3f
AA		 2133 /* free before overwriting resource */
2134 kfree(utf16_path);
2135 utf16_path = copy_path;
bea851b8 2136 } else {
256b4c3f 2137 uni_path_len = (2 * UniStrnlen((wchar_t *)utf16_path, PATH_MAX)) + 2;
bea851b8
SF		 2138 /* MUST set path len (NameLength) to 0 opening root of share */
2139 req->NameLength = cpu_to_le16(uni_path_len - 2);
2140 if (uni_path_len % 8 != 0) {
2141 copy_size = roundup(uni_path_len, 8);
2142 copy_path = kzalloc(copy_size, GFP_KERNEL);
2143 if (!copy_path) {
256b4c3f
AA		 2144 rc = -ENOMEM;
2145 goto err_free_req;
bea851b8 2146 }
256b4c3f 2147 memcpy((char *)copy_path, (const char *)utf16_path,
bea851b8
SF		 2148 uni_path_len);
2149 uni_path_len = copy_size;
256b4c3f
AA		 2150 /* free before overwriting resource */
2151 kfree(utf16_path);
2152 utf16_path = copy_path;
bea851b8
SF		 2153 }
2154 }
2155
2156 iov[1].iov_len = uni_path_len;
256b4c3f 2157 iov[1].iov_base = utf16_path;
bea851b8
SF		 2158 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2159
2160 if (tcon->posix_extensions) {
256b4c3f 2161 /* resource #3: posix buf */
bea851b8 2162 rc = add_posix_context(iov, &n_iov, mode);
256b4c3f
AA		 2163 if (rc)
2164 goto err_free_req;
bea851b8
SF		 2165 pc_buf = iov[n_iov-1].iov_base;
2166 }
2167
2168
2169 memset(&rqst, 0, sizeof(struct smb_rqst));
2170 rqst.rq_iov = iov;
2171 rqst.rq_nvec = n_iov;
2172
256b4c3f
AA		 2173 /* resource #4: response buffer */
2174 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
2175 if (rc) {
bea851b8
SF		 2176 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
2177 trace_smb3_posix_mkdir_err(xid, tcon->tid, ses->Suid,
256b4c3f
AA		 2178 CREATE_NOT_FILE,
2179 FILE_WRITE_ATTRIBUTES, rc);
2180 goto err_free_rsp_buf;
2181 }
2182
2183 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2184 trace_smb3_posix_mkdir_done(xid, rsp->PersistentFileId, tcon->tid,
2185 ses->Suid, CREATE_NOT_FILE,
2186 FILE_WRITE_ATTRIBUTES);
bea851b8
SF		 2187
2188 SMB2_close(xid, tcon, rsp->PersistentFileId, rsp->VolatileFileId);
2189
2190 /* Eventually save off posix specific response info and timestaps */
2191
256b4c3f 2192err_free_rsp_buf:
bea851b8 2193 free_rsp_buf(resp_buftype, rsp);
256b4c3f
AA		 2194 kfree(pc_buf);
2195err_free_req:
2196 cifs_small_buf_release(req);
2197err_free_path:
2198 kfree(utf16_path);
bea851b8 2199 return rc;
bea851b8 2200}
bea851b8 2201
2503a0db 2202int
1eb9fb52
RS		 2203SMB2_open_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, __u8 *oplock,
2204 struct cifs_open_parms *oparms, __le16 *path)
2503a0db 2205{
1eb9fb52 2206 struct TCP_Server_Info *server = tcon->ses->server;
2503a0db 2207 struct smb2_create_req *req;
da502f7d 2208 unsigned int n_iov = 2;
ca81983f 2209 __u32 file_attributes = 0;
1eb9fb52
RS		 2210 int copy_size;
2211 int uni_path_len;
4f33bc35 2212 unsigned int total_len;
1eb9fb52
RS		 2213 struct kvec *iov = rqst->rq_iov;
2214 __le16 *copy_path;
2215 int rc;
2503a0db 2216
4f33bc35 2217 rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
2503a0db
PS		 2218 if (rc)
2219 return rc;
2220
1eb9fb52
RS		 2221 iov[0].iov_base = (char *)req;
2222 /* -1 since last byte is buf[0] which is sent below (path) */
2223 iov[0].iov_len = total_len - 1;
7fb8986e 2224
064f6047 2225 if (oparms->create_options & CREATE_OPTION_READONLY)
ca81983f 2226 file_attributes |= ATTR_READONLY;
db8b631d
SF		 2227 if (oparms->create_options & CREATE_OPTION_SPECIAL)
2228 file_attributes |= ATTR_SYSTEM;
ca81983f 2229
2503a0db 2230 req->ImpersonationLevel = IL_IMPERSONATION;
064f6047 2231 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
2503a0db
PS		 2232 /* File attributes ignored on open (used in create though) */
2233 req->FileAttributes = cpu_to_le32(file_attributes);
2234 req->ShareAccess = FILE_SHARE_ALL_LE;
064f6047
PS		 2235 req->CreateDisposition = cpu_to_le32(oparms->disposition);
2236 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
4f33bc35 2237 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
f0712928
AA		 2238
2239 /* [MS-SMB2] 2.2.13 NameOffset:
2240 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2241 * the SMB2 header, the file name includes a prefix that will
2242 * be processed during DFS name normalization as specified in
2243 * section 3.3.5.9. Otherwise, the file name is relative to
2244 * the share that is identified by the TreeId in the SMB2
2245 * header.
2246 */
2247 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
2248 int name_len;
2249
4f33bc35 2250 req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
f0712928
AA		 2251 rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
2252 &name_len,
2253 tcon->treeName, path);
1eb9fb52 2254 if (rc)
f0712928
AA		 2255 return rc;
2256 req->NameLength = cpu_to_le16(name_len * 2);
59aa3718
PS		 2257 uni_path_len = copy_size;
2258 path = copy_path;
f0712928
AA		 2259 } else {
2260 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
2261 /* MUST set path len (NameLength) to 0 opening root of share */
2262 req->NameLength = cpu_to_le16(uni_path_len - 2);
1eb9fb52
RS		 2263 copy_size = uni_path_len;
2264 if (copy_size % 8 != 0)
2265 copy_size = roundup(copy_size, 8);
2266 copy_path = kzalloc(copy_size, GFP_KERNEL);
2267 if (!copy_path)
2268 return -ENOMEM;
2269 memcpy((char *)copy_path, (const char *)path,
2270 uni_path_len);
2271 uni_path_len = copy_size;
2272 path = copy_path;
2503a0db
PS		 2273 }
2274
59aa3718
PS		 2275 iov[1].iov_len = uni_path_len;
2276 iov[1].iov_base = path;
59aa3718 2277
b8c32dbb
PS		 2278 if (!server->oplocks)
2279 *oplock = SMB2_OPLOCK_LEVEL_NONE;
2280
a41a28bd 2281 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
b8c32dbb
PS		 2282 *oplock == SMB2_OPLOCK_LEVEL_NONE)
2283 req->RequestedOplockLevel = *oplock;
f8015683
SF		 2284 else if (!(server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING) &&
2285 (oparms->create_options & CREATE_NOT_FILE))
2286 req->RequestedOplockLevel = *oplock; /* no srv lease support */
b8c32dbb 2287 else {
729c0c9d
SB		 2288 rc = add_lease_context(server, iov, &n_iov,
2289 oparms->fid->lease_key, oplock);
1eb9fb52 2290 if (rc)
d22cbfec 2291 return rc;
b8c32dbb
PS		 2292 }
2293
63eb3def
PS		 2294 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
2295 /* need to set Next field of lease context if we request it */
a41a28bd 2296 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
63eb3def 2297 struct create_context *ccontext =
da502f7d 2298 (struct create_context *)iov[n_iov-1].iov_base;
1c46943f 2299 ccontext->Next =
a41a28bd 2300 cpu_to_le32(server->vals->create_lease_size);
63eb3def 2301 }
b56eae4d 2302
da502f7d 2303 rc = add_durable_context(iov, &n_iov, oparms,
b56eae4d 2304 tcon->use_persistent);
1eb9fb52 2305 if (rc)
63eb3def 2306 return rc;
63eb3def
PS		 2307 }
2308
ce558b0e
SF		 2309 if (tcon->posix_extensions) {
2310 if (n_iov > 2) {
2311 struct create_context *ccontext =
2312 (struct create_context *)iov[n_iov-1].iov_base;
2313 ccontext->Next =
2314 cpu_to_le32(iov[n_iov-1].iov_len);
2315 }
2316
2317 rc = add_posix_context(iov, &n_iov, oparms->mode);
1eb9fb52 2318 if (rc)
ce558b0e 2319 return rc;
ce558b0e 2320 }
ce558b0e 2321
cdeaf9d0
SF		 2322 if (tcon->snapshot_time) {
2323 cifs_dbg(FYI, "adding snapshot context\n");
2324 if (n_iov > 2) {
2325 struct create_context *ccontext =
2326 (struct create_context *)iov[n_iov-1].iov_base;
2327 ccontext->Next =
2328 cpu_to_le32(iov[n_iov-1].iov_len);
2329 }
2330
2331 rc = add_twarp_context(iov, &n_iov, tcon->snapshot_time);
2332 if (rc)
2333 return rc;
2334 }
2335
2336
1eb9fb52
RS		 2337 rqst->rq_nvec = n_iov;
2338 return 0;
2339}
2340
2341/* rq_iov[0] is the request and is released by cifs_small_buf_release().
2342 * All other vectors are freed by kfree().
2343 */
2344void
2345SMB2_open_free(struct smb_rqst *rqst)
2346{
2347 int i;
2348
32a1fb36
RS		 2349 if (rqst && rqst->rq_iov) {
2350 cifs_small_buf_release(rqst->rq_iov[0].iov_base);
2351 for (i = 1; i < rqst->rq_nvec; i++)
2352 if (rqst->rq_iov[i].iov_base != smb2_padding)
2353 kfree(rqst->rq_iov[i].iov_base);
2354 }
1eb9fb52
RS		 2355}
2356
2357int
2358SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
2359 __u8 *oplock, struct smb2_file_all_info *buf,
2360 struct kvec *err_iov, int *buftype)
2361{
2362 struct smb_rqst rqst;
2363 struct smb2_create_rsp *rsp = NULL;
2364 struct TCP_Server_Info *server;
2365 struct cifs_tcon *tcon = oparms->tcon;
2366 struct cifs_ses *ses = tcon->ses;
4d8dfafc 2367 struct kvec iov[SMB2_CREATE_IOV_SIZE];
1eb9fb52 2368 struct kvec rsp_iov = {NULL, 0};
ef2298a0 2369 int resp_buftype = CIFS_NO_BUFFER;
1eb9fb52
RS		 2370 int rc = 0;
2371 int flags = 0;
2372
2373 cifs_dbg(FYI, "create/open\n");
2374 if (ses && (ses->server))
2375 server = ses->server;
2376 else
2377 return -EIO;
2378
2379 if (smb3_encryption_required(tcon))
2380 flags |= CIFS_TRANSFORM_REQ;
2381
40eff45b 2382 memset(&rqst, 0, sizeof(struct smb_rqst));
1eb9fb52 2383 memset(&iov, 0, sizeof(iov));
40eff45b 2384 rqst.rq_iov = iov;
4d8dfafc 2385 rqst.rq_nvec = SMB2_CREATE_IOV_SIZE;
1eb9fb52
RS		 2386
2387 rc = SMB2_open_init(tcon, &rqst, oplock, oparms, path);
2388 if (rc)
2389 goto creat_exit;
40eff45b
RS		 2390
2391 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
4f33bc35 2392 &rsp_iov);
da502f7d 2393 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2503a0db
PS		 2394
2395 if (rc != 0) {
2396 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
91cb74f5
RS		 2397 if (err_iov && rsp) {
2398 *err_iov = rsp_iov;
9d874c36 2399 *buftype = resp_buftype;
91cb74f5
RS		 2400 resp_buftype = CIFS_NO_BUFFER;
2401 rsp = NULL;
2402 }
28d59363
SF		 2403 trace_smb3_open_err(xid, tcon->tid, ses->Suid,
2404 oparms->create_options, oparms->desired_access, rc);
2503a0db 2405 goto creat_exit;
28d59363
SF		 2406 } else
2407 trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid,
2408 ses->Suid, oparms->create_options,
2409 oparms->desired_access);
2503a0db 2410
fae8044c 2411 atomic_inc(&tcon->num_remote_opens);
064f6047
PS		 2412 oparms->fid->persistent_fid = rsp->PersistentFileId;
2413 oparms->fid->volatile_fid = rsp->VolatileFileId;
dfe33f9a
SF		 2414#ifdef CONFIG_CIFS_DEBUG2
2415 oparms->fid->mid = le64_to_cpu(rsp->sync_hdr.MessageId);
2416#endif /* CIFS_DEBUG2 */
f0df737e
PS		 2417
2418 if (buf) {
2419 memcpy(buf, &rsp->CreationTime, 32);
2420 buf->AllocationSize = rsp->AllocationSize;
2421 buf->EndOfFile = rsp->EndofFile;
2422 buf->Attributes = rsp->FileAttributes;
2423 buf->NumberOfLinks = cpu_to_le32(1);
2424 buf->DeletePending = 0;
2425 }
2e44b288 2426
b8c32dbb 2427 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
96164ab2
RS		 2428 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch,
2429 oparms->fid->lease_key);
b8c32dbb
PS		 2430 else
2431 *oplock = rsp->OplockLevel;
2503a0db 2432creat_exit:
1eb9fb52 2433 SMB2_open_free(&rqst);
2503a0db
PS		 2434 free_rsp_buf(resp_buftype, rsp);
2435 return rc;
2436}
2437
4a72dafa
SF		 2438/*
2439 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
2440 */
2441int
2442SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
63a83b86 2443 u64 volatile_fid, u32 opcode, bool is_fsctl,
51146625
AA		 2444 char *in_data, u32 indatalen,
2445 char **out_data, u32 *plen /* returned data len */)
4a72dafa 2446{
40eff45b 2447 struct smb_rqst rqst;
4a72dafa
SF		 2448 struct smb2_ioctl_req *req;
2449 struct smb2_ioctl_rsp *rsp;
8e353106 2450 struct cifs_ses *ses;
4a72dafa 2451 struct kvec iov[2];
da502f7d 2452 struct kvec rsp_iov;
4a72dafa 2453 int resp_buftype;
da502f7d 2454 int n_iov;
4a72dafa 2455 int rc = 0;
7fb8986e 2456 int flags = 0;
97754680 2457 unsigned int total_len;
4a72dafa
SF		 2458
2459 cifs_dbg(FYI, "SMB2 IOCTL\n");
2460
3d1a3745
SF		 2461 if (out_data != NULL)
2462 *out_data = NULL;
2463
4a72dafa
SF		 2464 /* zero out returned data len, in case of error */
2465 if (plen)
2466 *plen = 0;
2467
8e353106
SF		 2468 if (tcon)
2469 ses = tcon->ses;
2470 else
2471 return -EIO;
2472
68a6afa7 2473 if (!ses || !(ses->server))
4a72dafa
SF		 2474 return -EIO;
2475
97754680 2476 rc = smb2_plain_req_init(SMB2_IOCTL, tcon, (void **) &req, &total_len);
4a72dafa
SF		 2477 if (rc)
2478 return rc;
2479
5a77e75f 2480 if (smb3_encryption_required(tcon))
7fb8986e
PS		 2481 flags |= CIFS_TRANSFORM_REQ;
2482
4a72dafa
SF		 2483 req->CtlCode = cpu_to_le32(opcode);
2484 req->PersistentFileId = persistent_fid;
2485 req->VolatileFileId = volatile_fid;
2486
2487 if (indatalen) {
2488 req->InputCount = cpu_to_le32(indatalen);
2489 /* do not set InputOffset if no input data */
2490 req->InputOffset =
97754680 2491 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer));
4a72dafa
SF		 2492 iov[1].iov_base = in_data;
2493 iov[1].iov_len = indatalen;
da502f7d 2494 n_iov = 2;
4a72dafa 2495 } else
da502f7d 2496 n_iov = 1;
4a72dafa
SF		 2497
2498 req->OutputOffset = 0;
2499 req->OutputCount = 0; /* MBZ */
2500
2501 /*
2502 * Could increase MaxOutputResponse, but that would require more
2503 * than one credit. Windows typically sets this smaller, but for some
2504 * ioctls it may be useful to allow server to send more. No point
2505 * limiting what the server can send as long as fits in one credit
7db0a6ef
SF		 2506 * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE
2507 * (by default, note that it can be overridden to make max larger)
2508 * in responses (except for read responses which can be bigger.
2509 * We may want to bump this limit up
4a72dafa 2510 */
7db0a6ef 2511 req->MaxOutputResponse = cpu_to_le32(CIFSMaxBufSize);
4a72dafa
SF		 2512
2513 if (is_fsctl)
2514 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
2515 else
2516 req->Flags = 0;
2517
2518 iov[0].iov_base = (char *)req;
4a72dafa 2519
7ff8d45c
SF		 2520 /*
2521 * If no input data, the size of ioctl struct in
2522 * protocol spec still includes a 1 byte data buffer,
2523 * but if input data passed to ioctl, we do not
2524 * want to double count this, so we do not send
2525 * the dummy one byte of data in iovec[0] if sending
97754680 2526 * input data (in iovec[1]).
7ff8d45c
SF		 2527 */
2528
2529 if (indatalen) {
97754680 2530 iov[0].iov_len = total_len - 1;
7ff8d45c 2531 } else
97754680 2532 iov[0].iov_len = total_len;
7ff8d45c 2533
4587eee0
SF		 2534 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
2535 if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO)
97754680 2536 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
4a72dafa 2537
40eff45b
RS		 2538 memset(&rqst, 0, sizeof(struct smb_rqst));
2539 rqst.rq_iov = iov;
2540 rqst.rq_nvec = n_iov;
2541
2542 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
97754680 2543 &rsp_iov);
da502f7d
PS		 2544 cifs_small_buf_release(req);
2545 rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
4a72dafa 2546
eccb4422
SF		 2547 if (rc != 0)
2548 trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid,
2549 ses->Suid, 0, opcode, rc);
2550
9bf0c9cd 2551 if ((rc != 0) && (rc != -EINVAL)) {
8e353106 2552 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
4a72dafa 2553 goto ioctl_exit;
9bf0c9cd
SF		 2554 } else if (rc == -EINVAL) {
2555 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
2556 (opcode != FSCTL_SRV_COPYCHUNK)) {
8e353106 2557 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
9bf0c9cd
SF		 2558 goto ioctl_exit;
2559 }
4a72dafa
SF		 2560 }
2561
2562 /* check if caller wants to look at return data or just return rc */
2563 if ((plen == NULL) || (out_data == NULL))
2564 goto ioctl_exit;
2565
2566 *plen = le32_to_cpu(rsp->OutputCount);
2567
2568 /* We check for obvious errors in the output buffer length and offset */
2569 if (*plen == 0)
2570 goto ioctl_exit; /* server returned no data */
2d204ee9 2571 else if (*plen > rsp_iov.iov_len || *plen > 0xFF00) {
4a72dafa
SF		 2572 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
2573 *plen = 0;
2574 rc = -EIO;
2575 goto ioctl_exit;
2576 }
2577
2d204ee9 2578 if (rsp_iov.iov_len - *plen < le32_to_cpu(rsp->OutputOffset)) {
4a72dafa
SF		 2579 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
2580 le32_to_cpu(rsp->OutputOffset));
2581 *plen = 0;
2582 rc = -EIO;
2583 goto ioctl_exit;
2584 }
2585
d034feeb
Y		 2586 *out_data = kmemdup((char *)rsp + le32_to_cpu(rsp->OutputOffset),
2587 *plen, GFP_KERNEL);
4a72dafa
SF		 2588 if (*out_data == NULL) {
2589 rc = -ENOMEM;
2590 goto ioctl_exit;
2591 }
2592
4a72dafa
SF		 2593ioctl_exit:
2594 free_rsp_buf(resp_buftype, rsp);
2595 return rc;
2596}
2597
64a5cfa6
SF		 2598/*
2599 * Individual callers to ioctl worker function follow
2600 */
2601
2602int
2603SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2604 u64 persistent_fid, u64 volatile_fid)
2605{
2606 int rc;
64a5cfa6
SF		 2607 struct compress_ioctl fsctl_input;
2608 char *ret_data = NULL;
2609
2610 fsctl_input.CompressionState =
bc09d141 2611 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
64a5cfa6
SF		 2612
2613 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
2614 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
2615 (char *)&fsctl_input /* data input */,
2616 2 /* in data len */, &ret_data /* out data */, NULL);
2617
2618 cifs_dbg(FYI, "set compression rc %d\n", rc);
64a5cfa6
SF		 2619
2620 return rc;
2621}
2622
8eb4ecfa
RS		 2623int
2624SMB2_close_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
2625 u64 persistent_fid, u64 volatile_fid)
2626{
2627 struct smb2_close_req *req;
2628 struct kvec *iov = rqst->rq_iov;
2629 unsigned int total_len;
2630 int rc;
2631
2632 rc = smb2_plain_req_init(SMB2_CLOSE, tcon, (void **) &req, &total_len);
2633 if (rc)
2634 return rc;
2635
2636 req->PersistentFileId = persistent_fid;
2637 req->VolatileFileId = volatile_fid;
2638 iov[0].iov_base = (char *)req;
2639 iov[0].iov_len = total_len;
2640
2641 return 0;
2642}
2643
2644void
2645SMB2_close_free(struct smb_rqst *rqst)
2646{
32a1fb36
RS		 2647 if (rqst && rqst->rq_iov)
2648 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
8eb4ecfa
RS		 2649}
2650
2503a0db 2651int
97ca1762
RS		 2652SMB2_close_flags(const unsigned int xid, struct cifs_tcon *tcon,
2653 u64 persistent_fid, u64 volatile_fid, int flags)
2503a0db 2654{
40eff45b 2655 struct smb_rqst rqst;
8eb4ecfa 2656 struct smb2_close_rsp *rsp = NULL;
2503a0db
PS		 2657 struct cifs_ses *ses = tcon->ses;
2658 struct kvec iov[1];
da502f7d 2659 struct kvec rsp_iov;
ef2298a0 2660 int resp_buftype = CIFS_NO_BUFFER;
2503a0db
PS		 2661 int rc = 0;
2662
f96637be 2663 cifs_dbg(FYI, "Close\n");
2503a0db 2664
68a6afa7 2665 if (!ses || !(ses->server))
2503a0db
PS		 2666 return -EIO;
2667
5a77e75f 2668 if (smb3_encryption_required(tcon))
7fb8986e
PS		 2669 flags |= CIFS_TRANSFORM_REQ;
2670
40eff45b 2671 memset(&rqst, 0, sizeof(struct smb_rqst));
8eb4ecfa 2672 memset(&iov, 0, sizeof(iov));
40eff45b
RS		 2673 rqst.rq_iov = iov;
2674 rqst.rq_nvec = 1;
2675
8eb4ecfa
RS		 2676 rc = SMB2_close_init(tcon, &rqst, persistent_fid, volatile_fid);
2677 if (rc)
2678 goto close_exit;
2679
40eff45b 2680 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 2681 rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
2503a0db
PS		 2682
2683 if (rc != 0) {
d4a029d2 2684 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
eccb4422
SF		 2685 trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid,
2686 rc);
2503a0db
PS		 2687 goto close_exit;
2688 }
2689
fae8044c
SF		 2690 atomic_dec(&tcon->num_remote_opens);
2691
2503a0db
PS		 2692 /* BB FIXME - decode close response, update inode for caching */
2693
2694close_exit:
8eb4ecfa 2695 SMB2_close_free(&rqst);
2503a0db
PS		 2696 free_rsp_buf(resp_buftype, rsp);
2697 return rc;
2698}
be4cb9e3 2699
97ca1762
RS		 2700int
2701SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
2702 u64 persistent_fid, u64 volatile_fid)
2703{
2704 return SMB2_close_flags(xid, tcon, persistent_fid, volatile_fid, 0);
2705}
2706
730928c8
RS		 2707int
2708smb2_validate_iov(unsigned int offset, unsigned int buffer_length,
2709 struct kvec *iov, unsigned int min_buf_size)
be4cb9e3 2710{
c1596ff5 2711 unsigned int smb_len = iov->iov_len;
1fc6ad2f
RS		 2712 char *end_of_smb = smb_len + (char *)iov->iov_base;
2713 char *begin_of_buf = offset + (char *)iov->iov_base;
be4cb9e3
PS		 2714 char *end_of_buf = begin_of_buf + buffer_length;
2715
2716
2717 if (buffer_length < min_buf_size) {
f96637be
JP		 2718 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
2719 buffer_length, min_buf_size);
be4cb9e3
PS		 2720 return -EINVAL;
2721 }
2722
2723 /* check if beyond RFC1001 maximum length */
2724 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
f96637be
JP		 2725 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
2726 buffer_length, smb_len);
be4cb9e3
PS		 2727 return -EINVAL;
2728 }
2729
2730 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
f96637be 2731 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
be4cb9e3
PS		 2732 return -EINVAL;
2733 }
2734
2735 return 0;
2736}
2737
2738/*
2739 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2740 * Caller must free buffer.
2741 */
c5a5f38f
RS		 2742int
2743smb2_validate_and_copy_iov(unsigned int offset, unsigned int buffer_length,
2744 struct kvec *iov, unsigned int minbufsize,
2745 char *data)
be4cb9e3 2746{
1fc6ad2f 2747 char *begin_of_buf = offset + (char *)iov->iov_base;
be4cb9e3
PS		 2748 int rc;
2749
2750 if (!data)
2751 return -EINVAL;
2752
730928c8 2753 rc = smb2_validate_iov(offset, buffer_length, iov, minbufsize);
be4cb9e3
PS		 2754 if (rc)
2755 return rc;
2756
2757 memcpy(data, begin_of_buf, buffer_length);
2758
2759 return 0;
2760}
2761
296ecbae
RS		 2762int
2763SMB2_query_info_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
2764 u64 persistent_fid, u64 volatile_fid,
2765 u8 info_class, u8 info_type, u32 additional_info,
f5b05d62 2766 size_t output_len, size_t input_len, void *input)
be4cb9e3
PS		 2767{
2768 struct smb2_query_info_req *req;
296ecbae 2769 struct kvec *iov = rqst->rq_iov;
b2fb7fec 2770 unsigned int total_len;
296ecbae 2771 int rc;
be4cb9e3 2772
b2fb7fec
RS		 2773 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
2774 &total_len);
be4cb9e3
PS		 2775 if (rc)
2776 return rc;
2777
42c493c1 2778 req->InfoType = info_type;
f0df737e 2779 req->FileInfoClass = info_class;
be4cb9e3
PS		 2780 req->PersistentFileId = persistent_fid;
2781 req->VolatileFileId = volatile_fid;
42c493c1 2782 req->AdditionalInformation = cpu_to_le32(additional_info);
48923d2a 2783
f0df737e 2784 req->OutputBufferLength = cpu_to_le32(output_len);
f5b05d62
RS		 2785 if (input_len) {
2786 req->InputBufferLength = cpu_to_le32(input_len);
2787 /* total_len for smb query request never close to le16 max */
2788 req->InputBufferOffset = cpu_to_le16(total_len - 1);
2789 memcpy(req->Buffer, input, input_len);
2790 }
be4cb9e3
PS		 2791
2792 iov[0].iov_base = (char *)req;
b2fb7fec 2793 /* 1 for Buffer */
f5b05d62 2794 iov[0].iov_len = total_len - 1 + input_len;
296ecbae
RS		 2795 return 0;
2796}
2797
2798void
2799SMB2_query_info_free(struct smb_rqst *rqst)
2800{
32a1fb36
RS		 2801 if (rqst && rqst->rq_iov)
2802 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
296ecbae
RS		 2803}
2804
2805static int
2806query_info(const unsigned int xid, struct cifs_tcon *tcon,
2807 u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
2808 u32 additional_info, size_t output_len, size_t min_len, void **data,
2809 u32 *dlen)
2810{
2811 struct smb_rqst rqst;
2812 struct smb2_query_info_rsp *rsp = NULL;
2813 struct kvec iov[1];
2814 struct kvec rsp_iov;
2815 int rc = 0;
ef2298a0 2816 int resp_buftype = CIFS_NO_BUFFER;
296ecbae
RS		 2817 struct cifs_ses *ses = tcon->ses;
2818 int flags = 0;
73aaf920 2819 bool allocated = false;
296ecbae
RS		 2820
2821 cifs_dbg(FYI, "Query Info\n");
2822
2823 if (!ses || !(ses->server))
2824 return -EIO;
2825
2826 if (smb3_encryption_required(tcon))
2827 flags |= CIFS_TRANSFORM_REQ;
be4cb9e3 2828
40eff45b 2829 memset(&rqst, 0, sizeof(struct smb_rqst));
296ecbae 2830 memset(&iov, 0, sizeof(iov));
40eff45b
RS		 2831 rqst.rq_iov = iov;
2832 rqst.rq_nvec = 1;
2833
296ecbae
RS		 2834 rc = SMB2_query_info_init(tcon, &rqst, persistent_fid, volatile_fid,
2835 info_class, info_type, additional_info,
f5b05d62 2836 output_len, 0, NULL);
296ecbae
RS		 2837 if (rc)
2838 goto qinf_exit;
2839
40eff45b 2840 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 2841 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
e5d04887 2842
be4cb9e3
PS		 2843 if (rc) {
2844 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
eccb4422
SF		 2845 trace_smb3_query_info_err(xid, persistent_fid, tcon->tid,
2846 ses->Suid, info_class, (__u32)info_type, rc);
be4cb9e3
PS		 2847 goto qinf_exit;
2848 }
2849
42c493c1
SP		 2850 if (dlen) {
2851 *dlen = le32_to_cpu(rsp->OutputBufferLength);
2852 if (!*data) {
2853 *data = kmalloc(*dlen, GFP_KERNEL);
2854 if (!*data) {
2855 cifs_dbg(VFS,
2856 "Error %d allocating memory for acl\n",
2857 rc);
2858 *dlen = 0;
73aaf920 2859 rc = -ENOMEM;
42c493c1
SP		 2860 goto qinf_exit;
2861 }
73aaf920 2862 allocated = true;
42c493c1
SP		 2863 }
2864 }
2865
c5a5f38f
RS		 2866 rc = smb2_validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset),
2867 le32_to_cpu(rsp->OutputBufferLength),
2868 &rsp_iov, min_len, *data);
73aaf920
CIK		 2869 if (rc && allocated) {
2870 kfree(*data);
2871 *data = NULL;
2872 *dlen = 0;
2873 }
be4cb9e3
PS		 2874
2875qinf_exit:
296ecbae 2876 SMB2_query_info_free(&rqst);
be4cb9e3
PS		 2877 free_rsp_buf(resp_buftype, rsp);
2878 return rc;
2879}
9094fad1 2880
42c493c1
SP		 2881int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
2882 u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data)
2883{
2884 return query_info(xid, tcon, persistent_fid, volatile_fid,
2885 FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0,
2886 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
2887 sizeof(struct smb2_file_all_info), (void **)&data,
2888 NULL);
2889}
2890
f0df737e 2891int
42c493c1 2892SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
f0df737e 2893 u64 persistent_fid, u64 volatile_fid,
42c493c1 2894 void **data, u32 *plen)
f0df737e 2895{
42c493c1
SP		 2896 __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO;
2897 *plen = 0;
2898
f0df737e 2899 return query_info(xid, tcon, persistent_fid, volatile_fid,
42c493c1 2900 0, SMB2_O_INFO_SECURITY, additional_info,
ee25c6dd 2901 SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen);
f0df737e
PS		 2902}
2903
2904int
2905SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
2906 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
2907{
2908 return query_info(xid, tcon, persistent_fid, volatile_fid,
42c493c1
SP		 2909 FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0,
2910 sizeof(struct smb2_file_internal_info),
f0df737e 2911 sizeof(struct smb2_file_internal_info),
42c493c1 2912 (void **)&uniqueid, NULL);
f0df737e
PS		 2913}
2914
9094fad1
PS		 2915/*
2916 * This is a no-op for now. We're not really interested in the reply, but
2917 * rather in the fact that the server sent one and that server->lstrp
2918 * gets updated.
2919 *
2920 * FIXME: maybe we should consider checking that the reply matches request?
2921 */
2922static void
2923smb2_echo_callback(struct mid_q_entry *mid)
2924{
2925 struct TCP_Server_Info *server = mid->callback_data;
31473fc4 2926 struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
0fd1d37b 2927 unsigned int credits_received = 0;
9094fad1 2928
0fd1d37b
PS		 2929 if (mid->mid_state == MID_RESPONSE_RECEIVED
2930 || mid->mid_state == MID_RESPONSE_MALFORMED)
49f466bd 2931 credits_received = le16_to_cpu(rsp->sync_hdr.CreditRequest);
9094fad1
PS		 2932
2933 DeleteMidQEntry(mid);
2934 add_credits(server, credits_received, CIFS_ECHO_OP);
2935}
2936
53e0e11e
PS		 2937void smb2_reconnect_server(struct work_struct *work)
2938{
2939 struct TCP_Server_Info *server = container_of(work,
2940 struct TCP_Server_Info, reconnect.work);
2941 struct cifs_ses *ses;
2942 struct cifs_tcon *tcon, *tcon2;
2943 struct list_head tmp_list;
2944 int tcon_exist = false;
18ea4311
GP		 2945 int rc;
2946 int resched = false;
2947
53e0e11e
PS		 2948
2949 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2950 mutex_lock(&server->reconnect_mutex);
2951
2952 INIT_LIST_HEAD(&tmp_list);
2953 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
2954
2955 spin_lock(&cifs_tcp_ses_lock);
2956 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2957 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
96a988ff 2958 if (tcon->need_reconnect || tcon->need_reopen_files) {
53e0e11e
PS		 2959 tcon->tc_count++;
2960 list_add_tail(&tcon->rlist, &tmp_list);
2961 tcon_exist = true;
2962 }
2963 }
b327a717
AA		 2964 if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) {
2965 list_add_tail(&ses->tcon_ipc->rlist, &tmp_list);
2966 tcon_exist = true;
2967 }
53e0e11e
PS		 2968 }
2969 /*
2970 * Get the reference to server struct to be sure that the last call of
2971 * cifs_put_tcon() in the loop below won't release the server pointer.
2972 */
2973 if (tcon_exist)
2974 server->srv_count++;
2975
2976 spin_unlock(&cifs_tcp_ses_lock);
2977
2978 list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
18ea4311
GP		 2979 rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon);
2980 if (!rc)
96a988ff 2981 cifs_reopen_persistent_handles(tcon);
18ea4311
GP		 2982 else
2983 resched = true;
53e0e11e
PS		 2984 list_del_init(&tcon->rlist);
2985 cifs_put_tcon(tcon);
2986 }
2987
2988 cifs_dbg(FYI, "Reconnecting tcons finished\n");
18ea4311
GP		 2989 if (resched)
2990 queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
53e0e11e
PS		 2991 mutex_unlock(&server->reconnect_mutex);
2992
2993 /* now we can safely release srv struct */
2994 if (tcon_exist)
2995 cifs_put_tcp_session(server, 1);
2996}
2997
9094fad1
PS		 2998int
2999SMB2_echo(struct TCP_Server_Info *server)
3000{
3001 struct smb2_echo_req *req;
3002 int rc = 0;
c713c877 3003 struct kvec iov[1];
738f9de5 3004 struct smb_rqst rqst = { .rq_iov = iov,
c713c877 3005 .rq_nvec = 1 };
7f7ae759 3006 unsigned int total_len;
9094fad1 3007
f96637be 3008 cifs_dbg(FYI, "In echo request\n");
9094fad1 3009
4fcd1813 3010 if (server->tcpStatus == CifsNeedNegotiate) {
53e0e11e
PS		 3011 /* No need to send echo on newly established connections */
3012 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
3013 return rc;
4fcd1813
SF		 3014 }
3015
7f7ae759 3016 rc = smb2_plain_req_init(SMB2_ECHO, NULL, (void **)&req, &total_len);
9094fad1
PS		 3017 if (rc)
3018 return rc;
3019
7f7ae759 3020 req->sync_hdr.CreditRequest = cpu_to_le16(1);
9094fad1 3021
c713c877
RS		 3022 iov[0].iov_len = total_len;
3023 iov[0].iov_base = (char *)req;
9094fad1 3024
9b7c18a2
PS		 3025 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
3026 server, CIFS_ECHO_OP);
9094fad1 3027 if (rc)
f96637be 3028 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
9094fad1
PS		 3029
3030 cifs_small_buf_release(req);
3031 return rc;
3032}
7a5cfb19
PS		 3033
3034int
3035SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
3036 u64 volatile_fid)
3037{
40eff45b 3038 struct smb_rqst rqst;
7a5cfb19 3039 struct smb2_flush_req *req;
7a5cfb19
PS		 3040 struct cifs_ses *ses = tcon->ses;
3041 struct kvec iov[1];
da502f7d 3042 struct kvec rsp_iov;
7a5cfb19
PS		 3043 int resp_buftype;
3044 int rc = 0;
7fb8986e 3045 int flags = 0;
1f444e4c 3046 unsigned int total_len;
7a5cfb19 3047
f96637be 3048 cifs_dbg(FYI, "Flush\n");
7a5cfb19 3049
68a6afa7 3050 if (!ses || !(ses->server))
7a5cfb19
PS		 3051 return -EIO;
3052
1f444e4c 3053 rc = smb2_plain_req_init(SMB2_FLUSH, tcon, (void **) &req, &total_len);
7a5cfb19
PS		 3054 if (rc)
3055 return rc;
3056
5a77e75f 3057 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3058 flags |= CIFS_TRANSFORM_REQ;
3059
7a5cfb19
PS		 3060 req->PersistentFileId = persistent_fid;
3061 req->VolatileFileId = volatile_fid;
3062
3063 iov[0].iov_base = (char *)req;
1f444e4c 3064 iov[0].iov_len = total_len;
7a5cfb19 3065
40eff45b
RS		 3066 memset(&rqst, 0, sizeof(struct smb_rqst));
3067 rqst.rq_iov = iov;
3068 rqst.rq_nvec = 1;
3069
3070 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 3071 cifs_small_buf_release(req);
7a5cfb19 3072
eccb4422 3073 if (rc != 0) {
7a5cfb19 3074 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
eccb4422
SF		 3075 trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid,
3076 rc);
3077 }
7a5cfb19 3078
da502f7d 3079 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
7a5cfb19
PS		 3080 return rc;
3081}
09a4707e
PS		 3082
3083/*
3084 * To form a chain of read requests, any read requests after the first should
3085 * have the end_of_chain boolean set to true.
3086 */
3087static int
738f9de5 3088smb2_new_read_req(void **buf, unsigned int *total_len,
2dabfd5b
LL		 3089 struct cifs_io_parms *io_parms, struct cifs_readdata *rdata,
3090 unsigned int remaining_bytes, int request_type)
09a4707e
PS		 3091{
3092 int rc = -EACCES;
b8f57ee8 3093 struct smb2_read_plain_req *req = NULL;
31473fc4 3094 struct smb2_sync_hdr *shdr;
2dabfd5b 3095 struct TCP_Server_Info *server;
09a4707e 3096
b8f57ee8
PS		 3097 rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
3098 total_len);
09a4707e
PS		 3099 if (rc)
3100 return rc;
2dabfd5b
LL		 3101
3102 server = io_parms->tcon->ses->server;
3103 if (server == NULL)
09a4707e
PS		 3104 return -ECONNABORTED;
3105
b8f57ee8 3106 shdr = &req->sync_hdr;
31473fc4 3107 shdr->ProcessId = cpu_to_le32(io_parms->pid);
09a4707e
PS		 3108
3109 req->PersistentFileId = io_parms->persistent_fid;
3110 req->VolatileFileId = io_parms->volatile_fid;
3111 req->ReadChannelInfoOffset = 0; /* reserved */
3112 req->ReadChannelInfoLength = 0; /* reserved */
3113 req->Channel = 0; /* reserved */
3114 req->MinimumCount = 0;
3115 req->Length = cpu_to_le32(io_parms->length);
3116 req->Offset = cpu_to_le64(io_parms->offset);
bd3dcc6a
LL		 3117#ifdef CONFIG_CIFS_SMB_DIRECT
3118 /*
3119 * If we want to do a RDMA write, fill in and append
3120 * smbd_buffer_descriptor_v1 to the end of read request
3121 */
bb4c0419 3122 if (server->rdma && rdata && !server->sign &&
bd3dcc6a
LL		 3123 rdata->bytes >= server->smbd_conn->rdma_readwrite_threshold) {
3124
3125 struct smbd_buffer_descriptor_v1 *v1;
3126 bool need_invalidate =
3127 io_parms->tcon->ses->server->dialect == SMB30_PROT_ID;
3128
3129 rdata->mr = smbd_register_mr(
3130 server->smbd_conn, rdata->pages,
7cf20bce
LL		 3131 rdata->nr_pages, rdata->page_offset,
3132 rdata->tailsz, true, need_invalidate);
bd3dcc6a
LL		 3133 if (!rdata->mr)
3134 return -ENOBUFS;
3135
3136 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
3137 if (need_invalidate)
3138 req->Channel = SMB2_CHANNEL_RDMA_V1;
3139 req->ReadChannelInfoOffset =
2026b06e 3140 cpu_to_le16(offsetof(struct smb2_read_plain_req, Buffer));
bd3dcc6a 3141 req->ReadChannelInfoLength =
2026b06e 3142 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
bd3dcc6a 3143 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
2026b06e
SF		 3144 v1->offset = cpu_to_le64(rdata->mr->mr->iova);
3145 v1->token = cpu_to_le32(rdata->mr->mr->rkey);
3146 v1->length = cpu_to_le32(rdata->mr->mr->length);
bd3dcc6a
LL		 3147
3148 *total_len += sizeof(*v1) - 1;
3149 }
3150#endif
09a4707e
PS		 3151 if (request_type & CHAINED_REQUEST) {
3152 if (!(request_type & END_OF_CHAIN)) {
b8f57ee8
PS		 3153 /* next 8-byte aligned request */
3154 *total_len = DIV_ROUND_UP(*total_len, 8) * 8;
3155 shdr->NextCommand = cpu_to_le32(*total_len);
09a4707e 3156 } else /* END_OF_CHAIN */
31473fc4 3157 shdr->NextCommand = 0;
09a4707e 3158 if (request_type & RELATED_REQUEST) {
31473fc4 3159 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
09a4707e
PS		 3160 /*
3161 * Related requests use info from previous read request
3162 * in chain.
3163 */
31473fc4
PS		 3164 shdr->SessionId = 0xFFFFFFFF;
3165 shdr->TreeId = 0xFFFFFFFF;
09a4707e
PS		 3166 req->PersistentFileId = 0xFFFFFFFF;
3167 req->VolatileFileId = 0xFFFFFFFF;
3168 }
3169 }
3170 if (remaining_bytes > io_parms->length)
3171 req->RemainingBytes = cpu_to_le32(remaining_bytes);
3172 else
3173 req->RemainingBytes = 0;
3174
738f9de5 3175 *buf = req;
09a4707e
PS		 3176 return rc;
3177}
3178
3179static void
3180smb2_readv_callback(struct mid_q_entry *mid)
3181{
3182 struct cifs_readdata *rdata = mid->callback_data;
3183 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
3184 struct TCP_Server_Info *server = tcon->ses->server;
738f9de5 3185 struct smb2_sync_hdr *shdr =
977b6170 3186 (struct smb2_sync_hdr *)rdata->iov[0].iov_base;
0fd1d37b 3187 unsigned int credits_received = 0;
738f9de5
PS		 3188 struct smb_rqst rqst = { .rq_iov = rdata->iov,
3189 .rq_nvec = 2,
8321fec4 3190 .rq_pages = rdata->pages,
1dbe3466 3191 .rq_offset = rdata->page_offset,
8321fec4
JL		 3192 .rq_npages = rdata->nr_pages,
3193 .rq_pagesz = rdata->pagesz,
3194 .rq_tailsz = rdata->tailsz };
09a4707e 3195
f96637be
JP		 3196 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
3197 __func__, mid->mid, mid->mid_state, rdata->result,
3198 rdata->bytes);
09a4707e
PS		 3199
3200 switch (mid->mid_state) {
3201 case MID_RESPONSE_RECEIVED:
31473fc4 3202 credits_received = le16_to_cpu(shdr->CreditRequest);
09a4707e 3203 /* result already set, check signature */
4326ed2f 3204 if (server->sign && !mid->decrypted) {
3c1bf7e4
PS		 3205 int rc;
3206
0b688cfc 3207 rc = smb2_verify_signature(&rqst, server);
3c1bf7e4 3208 if (rc)
f96637be
JP		 3209 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
3210 rc);
3c1bf7e4 3211 }
09a4707e 3212 /* FIXME: should this be counted toward the initiating task? */
34a54d61
PS		 3213 task_io_account_read(rdata->got_bytes);
3214 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 3215 break;
3216 case MID_REQUEST_SUBMITTED:
3217 case MID_RETRY_NEEDED:
3218 rdata->result = -EAGAIN;
d913ed17
PS		 3219 if (server->sign && rdata->got_bytes)
3220 /* reset bytes number since we can not check a sign */
3221 rdata->got_bytes = 0;
3222 /* FIXME: should this be counted toward the initiating task? */
3223 task_io_account_read(rdata->got_bytes);
3224 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e 3225 break;
0fd1d37b
PS		 3226 case MID_RESPONSE_MALFORMED:
3227 credits_received = le16_to_cpu(shdr->CreditRequest);
3228 /* fall through */
09a4707e
PS		 3229 default:
3230 if (rdata->result != -ENODATA)
3231 rdata->result = -EIO;
3232 }
bd3dcc6a
LL		 3233#ifdef CONFIG_CIFS_SMB_DIRECT
3234 /*
3235 * If this rdata has a memmory registered, the MR can be freed
3236 * MR needs to be freed as soon as I/O finishes to prevent deadlock
3237 * because they have limited number and are used for future I/Os
3238 */
3239 if (rdata->mr) {
3240 smbd_deregister_mr(rdata->mr);
3241 rdata->mr = NULL;
3242 }
3243#endif
082aaa87 3244 if (rdata->result && rdata->result != -ENODATA) {
09a4707e 3245 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
7d42e72f
PS		 3246 trace_smb3_read_err(0 /* xid */,
3247 rdata->cfile->fid.persistent_fid,
3248 tcon->tid, tcon->ses->Suid, rdata->offset,
3249 rdata->bytes, rdata->result);
3250 } else
3251 trace_smb3_read_done(0 /* xid */,
3252 rdata->cfile->fid.persistent_fid,
3253 tcon->tid, tcon->ses->Suid,
3254 rdata->offset, rdata->got_bytes);
09a4707e
PS		 3255
3256 queue_work(cifsiod_wq, &rdata->work);
3257 DeleteMidQEntry(mid);
3258 add_credits(server, credits_received, 0);
3259}
3260
738f9de5 3261/* smb2_async_readv - send an async read, and set up mid to handle result */
09a4707e
PS		 3262int
3263smb2_async_readv(struct cifs_readdata *rdata)
3264{
bed9da02 3265 int rc, flags = 0;
31473fc4
PS		 3266 char *buf;
3267 struct smb2_sync_hdr *shdr;
09a4707e 3268 struct cifs_io_parms io_parms;
738f9de5 3269 struct smb_rqst rqst = { .rq_iov = rdata->iov,
c713c877 3270 .rq_nvec = 1 };
bed9da02 3271 struct TCP_Server_Info *server;
738f9de5 3272 unsigned int total_len;
09a4707e 3273
f96637be
JP		 3274 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
3275 __func__, rdata->offset, rdata->bytes);
09a4707e
PS		 3276
3277 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
3278 io_parms.offset = rdata->offset;
3279 io_parms.length = rdata->bytes;
3280 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
3281 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
3282 io_parms.pid = rdata->pid;
bed9da02
PS		 3283
3284 server = io_parms.tcon->ses->server;
3285
2dabfd5b
LL		 3286 rc = smb2_new_read_req(
3287 (void **) &buf, &total_len, &io_parms, rdata, 0, 0);
bed9da02
PS		 3288 if (rc) {
3289 if (rc == -EAGAIN && rdata->credits) {
3290 /* credits was reset by reconnect */
3291 rdata->credits = 0;
3292 /* reduce in_flight value since we won't send the req */
3293 spin_lock(&server->req_lock);
3294 server->in_flight--;
3295 spin_unlock(&server->req_lock);
3296 }
09a4707e 3297 return rc;
bed9da02 3298 }
09a4707e 3299
5a77e75f 3300 if (smb3_encryption_required(io_parms.tcon))
7fb8986e
PS		 3301 flags |= CIFS_TRANSFORM_REQ;
3302
c713c877
RS		 3303 rdata->iov[0].iov_base = buf;
3304 rdata->iov[0].iov_len = total_len;
b8f57ee8
PS		 3305
3306 shdr = (struct smb2_sync_hdr *)buf;
09a4707e 3307
bed9da02 3308 if (rdata->credits) {
31473fc4 3309 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
bed9da02 3310 SMB2_MAX_BUFFER_SIZE));
b983f7e9
PS		 3311 shdr->CreditRequest =
3312 cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 1);
bed9da02
PS		 3313 spin_lock(&server->req_lock);
3314 server->credits += rdata->credits -
31473fc4 3315 le16_to_cpu(shdr->CreditCharge);
bed9da02
PS		 3316 spin_unlock(&server->req_lock);
3317 wake_up(&server->request_q);
b983f7e9 3318 rdata->credits = le16_to_cpu(shdr->CreditCharge);
7fb8986e 3319 flags |= CIFS_HAS_CREDITS;
bed9da02
PS		 3320 }
3321
09a4707e 3322 kref_get(&rdata->refcount);
fec344e3 3323 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
09a4707e 3324 cifs_readv_receive, smb2_readv_callback,
4326ed2f 3325 smb3_handle_read_data, rdata, flags);
e5d04887 3326 if (rc) {
09a4707e 3327 kref_put(&rdata->refcount, cifs_readdata_release);
e5d04887 3328 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
7d42e72f
PS		 3329 trace_smb3_read_err(0 /* xid */, io_parms.persistent_fid,
3330 io_parms.tcon->tid,
3331 io_parms.tcon->ses->Suid,
3332 io_parms.offset, io_parms.length, rc);
3333 }
09a4707e
PS		 3334
3335 cifs_small_buf_release(buf);
3336 return rc;
3337}
33319141 3338
d8e05039
PS		 3339int
3340SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
3341 unsigned int *nbytes, char **buf, int *buf_type)
3342{
40eff45b 3343 struct smb_rqst rqst;
d8e05039 3344 int resp_buftype, rc = -EACCES;
b8f57ee8 3345 struct smb2_read_plain_req *req = NULL;
d8e05039 3346 struct smb2_read_rsp *rsp = NULL;
f5688a6d 3347 struct kvec iov[1];
da502f7d 3348 struct kvec rsp_iov;
738f9de5 3349 unsigned int total_len;
7fb8986e
PS		 3350 int flags = CIFS_LOG_ERROR;
3351 struct cifs_ses *ses = io_parms->tcon->ses;
d8e05039
PS		 3352
3353 *nbytes = 0;
2dabfd5b 3354 rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0);
d8e05039
PS		 3355 if (rc)
3356 return rc;
3357
5a77e75f 3358 if (smb3_encryption_required(io_parms->tcon))
7fb8986e
PS		 3359 flags |= CIFS_TRANSFORM_REQ;
3360
f5688a6d
RS		 3361 iov[0].iov_base = (char *)req;
3362 iov[0].iov_len = total_len;
b8f57ee8 3363
40eff45b
RS		 3364 memset(&rqst, 0, sizeof(struct smb_rqst));
3365 rqst.rq_iov = iov;
3366 rqst.rq_nvec = 1;
3367
3368 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
b8f57ee8 3369 cifs_small_buf_release(req);
d8e05039 3370
da502f7d 3371 rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
d8e05039 3372
a821df3f
RS		 3373 if (rc) {
3374 if (rc != -ENODATA) {
3375 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
3376 cifs_dbg(VFS, "Send error in read = %d\n", rc);
7d42e72f
PS		 3377 trace_smb3_read_err(xid, req->PersistentFileId,
3378 io_parms->tcon->tid, ses->Suid,
3379 io_parms->offset, io_parms->length,
3380 rc);
a821df3f 3381 }
da502f7d 3382 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
a821df3f 3383 return rc == -ENODATA ? 0 : rc;
eccb4422
SF		 3384 } else
3385 trace_smb3_read_done(xid, req->PersistentFileId,
3386 io_parms->tcon->tid, ses->Suid,
3387 io_parms->offset, io_parms->length);
d8e05039 3388
a821df3f
RS		 3389 *nbytes = le32_to_cpu(rsp->DataLength);
3390 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
3391 (*nbytes > io_parms->length)) {
3392 cifs_dbg(FYI, "bad length %d for count %d\n",
3393 *nbytes, io_parms->length);
3394 rc = -EIO;
3395 *nbytes = 0;
d8e05039
PS		 3396 }
3397
3398 if (*buf) {
977b6170 3399 memcpy(*buf, (char *)rsp + rsp->DataOffset, *nbytes);
da502f7d 3400 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
d8e05039 3401 } else if (resp_buftype != CIFS_NO_BUFFER) {
da502f7d 3402 *buf = rsp_iov.iov_base;
d8e05039
PS		 3403 if (resp_buftype == CIFS_SMALL_BUFFER)
3404 *buf_type = CIFS_SMALL_BUFFER;
3405 else if (resp_buftype == CIFS_LARGE_BUFFER)
3406 *buf_type = CIFS_LARGE_BUFFER;
3407 }
3408 return rc;
3409}
3410
33319141
PS		 3411/*
3412 * Check the mid_state and signature on received buffer (if any), and queue the
3413 * workqueue completion task.
3414 */
3415static void
3416smb2_writev_callback(struct mid_q_entry *mid)
3417{
3418 struct cifs_writedata *wdata = mid->callback_data;
3419 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
3420 unsigned int written;
3421 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
0fd1d37b 3422 unsigned int credits_received = 0;
33319141
PS		 3423
3424 switch (mid->mid_state) {
3425 case MID_RESPONSE_RECEIVED:
49f466bd 3426 credits_received = le16_to_cpu(rsp->sync_hdr.CreditRequest);
33319141
PS		 3427 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
3428 if (wdata->result != 0)
3429 break;
3430
3431 written = le32_to_cpu(rsp->DataLength);
3432 /*
3433 * Mask off high 16 bits when bytes written as returned
3434 * by the server is greater than bytes requested by the
3435 * client. OS/2 servers are known to set incorrect
3436 * CountHigh values.
3437 */
3438 if (written > wdata->bytes)
3439 written &= 0xFFFF;
3440
3441 if (written < wdata->bytes)
3442 wdata->result = -ENOSPC;
3443 else
3444 wdata->bytes = written;
3445 break;
3446 case MID_REQUEST_SUBMITTED:
3447 case MID_RETRY_NEEDED:
3448 wdata->result = -EAGAIN;
3449 break;
0fd1d37b
PS		 3450 case MID_RESPONSE_MALFORMED:
3451 credits_received = le16_to_cpu(rsp->sync_hdr.CreditRequest);
3452 /* fall through */
33319141
PS		 3453 default:
3454 wdata->result = -EIO;
3455 break;
3456 }
db223a59
LL		 3457#ifdef CONFIG_CIFS_SMB_DIRECT
3458 /*
3459 * If this wdata has a memory registered, the MR can be freed
3460 * The number of MRs available is limited, it's important to recover
3461 * used MR as soon as I/O is finished. Hold MR longer in the later
3462 * I/O process can possibly result in I/O deadlock due to lack of MR
3463 * to send request on I/O retry
3464 */
3465 if (wdata->mr) {
3466 smbd_deregister_mr(wdata->mr);
3467 wdata->mr = NULL;
3468 }
3469#endif
7d42e72f 3470 if (wdata->result) {
33319141 3471 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
7d42e72f
PS		 3472 trace_smb3_write_err(0 /* no xid */,
3473 wdata->cfile->fid.persistent_fid,
3474 tcon->tid, tcon->ses->Suid, wdata->offset,
3475 wdata->bytes, wdata->result);
3476 } else
3477 trace_smb3_write_done(0 /* no xid */,
3478 wdata->cfile->fid.persistent_fid,
3479 tcon->tid, tcon->ses->Suid,
3480 wdata->offset, wdata->bytes);
33319141
PS		 3481
3482 queue_work(cifsiod_wq, &wdata->work);
3483 DeleteMidQEntry(mid);
3484 add_credits(tcon->ses->server, credits_received, 0);
3485}
3486
3487/* smb2_async_writev - send an async write, and set up mid to handle result */
3488int
4a5c80d7
SF		 3489smb2_async_writev(struct cifs_writedata *wdata,
3490 void (*release)(struct kref *kref))
33319141 3491{
cb7e9eab 3492 int rc = -EACCES, flags = 0;
33319141 3493 struct smb2_write_req *req = NULL;
31473fc4 3494 struct smb2_sync_hdr *shdr;
33319141 3495 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
cb7e9eab 3496 struct TCP_Server_Info *server = tcon->ses->server;
c713c877 3497 struct kvec iov[1];
738f9de5 3498 struct smb_rqst rqst = { };
f5688a6d 3499 unsigned int total_len;
33319141 3500
f5688a6d 3501 rc = smb2_plain_req_init(SMB2_WRITE, tcon, (void **) &req, &total_len);
cb7e9eab
PS		 3502 if (rc) {
3503 if (rc == -EAGAIN && wdata->credits) {
3504 /* credits was reset by reconnect */
3505 wdata->credits = 0;
3506 /* reduce in_flight value since we won't send the req */
3507 spin_lock(&server->req_lock);
3508 server->in_flight--;
3509 spin_unlock(&server->req_lock);
3510 }
33319141 3511 goto async_writev_out;
cb7e9eab 3512 }
33319141 3513
5a77e75f 3514 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3515 flags |= CIFS_TRANSFORM_REQ;
3516
f5688a6d 3517 shdr = (struct smb2_sync_hdr *)req;
31473fc4 3518 shdr->ProcessId = cpu_to_le32(wdata->cfile->pid);
33319141
PS		 3519
3520 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
3521 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
3522 req->WriteChannelInfoOffset = 0;
3523 req->WriteChannelInfoLength = 0;
3524 req->Channel = 0;
3525 req->Offset = cpu_to_le64(wdata->offset);
33319141 3526 req->DataOffset = cpu_to_le16(
f5688a6d 3527 offsetof(struct smb2_write_req, Buffer));
33319141 3528 req->RemainingBytes = 0;
db223a59
LL		 3529#ifdef CONFIG_CIFS_SMB_DIRECT
3530 /*
3531 * If we want to do a server RDMA read, fill in and append
3532 * smbd_buffer_descriptor_v1 to the end of write request
3533 */
bb4c0419 3534 if (server->rdma && !server->sign && wdata->bytes >=
db223a59
LL		 3535 server->smbd_conn->rdma_readwrite_threshold) {
3536
3537 struct smbd_buffer_descriptor_v1 *v1;
3538 bool need_invalidate = server->dialect == SMB30_PROT_ID;
3539
3540 wdata->mr = smbd_register_mr(
3541 server->smbd_conn, wdata->pages,
7cf20bce
LL		 3542 wdata->nr_pages, wdata->page_offset,
3543 wdata->tailsz, false, need_invalidate);
db223a59
LL		 3544 if (!wdata->mr) {
3545 rc = -ENOBUFS;
3546 goto async_writev_out;
3547 }
3548 req->Length = 0;
3549 req->DataOffset = 0;
7cf20bce
LL		 3550 if (wdata->nr_pages > 1)
3551 req->RemainingBytes =
3552 cpu_to_le32(
3553 (wdata->nr_pages - 1) * wdata->pagesz -
3554 wdata->page_offset + wdata->tailsz
3555 );
3556 else
3557 req->RemainingBytes = cpu_to_le32(wdata->tailsz);
db223a59
LL		 3558 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
3559 if (need_invalidate)
3560 req->Channel = SMB2_CHANNEL_RDMA_V1;
3561 req->WriteChannelInfoOffset =
2026b06e 3562 cpu_to_le16(offsetof(struct smb2_write_req, Buffer));
db223a59 3563 req->WriteChannelInfoLength =
2026b06e 3564 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
db223a59 3565 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
2026b06e
SF		 3566 v1->offset = cpu_to_le64(wdata->mr->mr->iova);
3567 v1->token = cpu_to_le32(wdata->mr->mr->rkey);
3568 v1->length = cpu_to_le32(wdata->mr->mr->length);
db223a59
LL		 3569 }
3570#endif
c713c877
RS		 3571 iov[0].iov_len = total_len - 1;
3572 iov[0].iov_base = (char *)req;
33319141 3573
738f9de5 3574 rqst.rq_iov = iov;
c713c877 3575 rqst.rq_nvec = 1;
eddb079d 3576 rqst.rq_pages = wdata->pages;
57a929a6 3577 rqst.rq_offset = wdata->page_offset;
eddb079d
JL		 3578 rqst.rq_npages = wdata->nr_pages;
3579 rqst.rq_pagesz = wdata->pagesz;
3580 rqst.rq_tailsz = wdata->tailsz;
db223a59
LL		 3581#ifdef CONFIG_CIFS_SMB_DIRECT
3582 if (wdata->mr) {
c713c877 3583 iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1);
db223a59
LL		 3584 rqst.rq_npages = 0;
3585 }
3586#endif
f96637be
JP		 3587 cifs_dbg(FYI, "async write at %llu %u bytes\n",
3588 wdata->offset, wdata->bytes);
33319141 3589
db223a59
LL		 3590#ifdef CONFIG_CIFS_SMB_DIRECT
3591 /* For RDMA read, I/O size is in RemainingBytes not in Length */
3592 if (!wdata->mr)
3593 req->Length = cpu_to_le32(wdata->bytes);
3594#else
33319141 3595 req->Length = cpu_to_le32(wdata->bytes);
db223a59 3596#endif
33319141 3597
cb7e9eab 3598 if (wdata->credits) {
31473fc4 3599 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
cb7e9eab 3600 SMB2_MAX_BUFFER_SIZE));
b983f7e9
PS		 3601 shdr->CreditRequest =
3602 cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 1);
cb7e9eab
PS		 3603 spin_lock(&server->req_lock);
3604 server->credits += wdata->credits -
31473fc4 3605 le16_to_cpu(shdr->CreditCharge);
cb7e9eab
PS		 3606 spin_unlock(&server->req_lock);
3607 wake_up(&server->request_q);
b983f7e9 3608 wdata->credits = le16_to_cpu(shdr->CreditCharge);
7fb8986e 3609 flags |= CIFS_HAS_CREDITS;
cb7e9eab
PS		 3610 }
3611
33319141 3612 kref_get(&wdata->refcount);
9b7c18a2
PS		 3613 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
3614 wdata, flags);
33319141 3615
e5d04887 3616 if (rc) {
eccb4422
SF		 3617 trace_smb3_write_err(0 /* no xid */, req->PersistentFileId,
3618 tcon->tid, tcon->ses->Suid, wdata->offset,
3619 wdata->bytes, rc);
4a5c80d7 3620 kref_put(&wdata->refcount, release);
e5d04887 3621 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
7d42e72f 3622 }
33319141 3623
33319141
PS		 3624async_writev_out:
3625 cifs_small_buf_release(req);
33319141
PS		 3626 return rc;
3627}
009d3443
PS		 3628
3629/*
3630 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
3631 * The length field from io_parms must be at least 1 and indicates a number of
3632 * elements with data to write that begins with position 1 in iov array. All
3633 * data length is specified by count.
3634 */
3635int
3636SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
3637 unsigned int *nbytes, struct kvec *iov, int n_vec)
3638{
40eff45b 3639 struct smb_rqst rqst;
009d3443
PS		 3640 int rc = 0;
3641 struct smb2_write_req *req = NULL;
3642 struct smb2_write_rsp *rsp = NULL;
3643 int resp_buftype;
da502f7d 3644 struct kvec rsp_iov;
7fb8986e 3645 int flags = 0;
f5688a6d 3646 unsigned int total_len;
da502f7d 3647
009d3443
PS		 3648 *nbytes = 0;
3649
3650 if (n_vec < 1)
3651 return rc;
3652
f5688a6d
RS		 3653 rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, (void **) &req,
3654 &total_len);
009d3443
PS		 3655 if (rc)
3656 return rc;
3657
3658 if (io_parms->tcon->ses->server == NULL)
3659 return -ECONNABORTED;
3660
5a77e75f 3661 if (smb3_encryption_required(io_parms->tcon))
7fb8986e
PS		 3662 flags |= CIFS_TRANSFORM_REQ;
3663
f5688a6d 3664 req->sync_hdr.ProcessId = cpu_to_le32(io_parms->pid);
009d3443
PS		 3665
3666 req->PersistentFileId = io_parms->persistent_fid;
3667 req->VolatileFileId = io_parms->volatile_fid;
3668 req->WriteChannelInfoOffset = 0;
3669 req->WriteChannelInfoLength = 0;
3670 req->Channel = 0;
3671 req->Length = cpu_to_le32(io_parms->length);
3672 req->Offset = cpu_to_le64(io_parms->offset);
009d3443 3673 req->DataOffset = cpu_to_le16(
f5688a6d 3674 offsetof(struct smb2_write_req, Buffer));
009d3443
PS		 3675 req->RemainingBytes = 0;
3676
3677 iov[0].iov_base = (char *)req;
f5688a6d
RS		 3678 /* 1 for Buffer */
3679 iov[0].iov_len = total_len - 1;
009d3443 3680
40eff45b
RS		 3681 memset(&rqst, 0, sizeof(struct smb_rqst));
3682 rqst.rq_iov = iov;
3683 rqst.rq_nvec = n_vec + 1;
3684
3685 rc = cifs_send_recv(xid, io_parms->tcon->ses, &rqst,
f5688a6d 3686 &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 3687 cifs_small_buf_release(req);
3688 rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
009d3443
PS		 3689
3690 if (rc) {
eccb4422
SF		 3691 trace_smb3_write_err(xid, req->PersistentFileId,
3692 io_parms->tcon->tid,
3693 io_parms->tcon->ses->Suid,
3694 io_parms->offset, io_parms->length, rc);
009d3443 3695 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
f96637be 3696 cifs_dbg(VFS, "Send error in write = %d\n", rc);
eccb4422 3697 } else {
009d3443 3698 *nbytes = le32_to_cpu(rsp->DataLength);
eccb4422
SF		 3699 trace_smb3_write_done(xid, req->PersistentFileId,
3700 io_parms->tcon->tid,
3701 io_parms->tcon->ses->Suid,
3702 io_parms->offset, *nbytes);
3703 }
e5d04887
PS		 3704
3705 free_rsp_buf(resp_buftype, rsp);
009d3443
PS		 3706 return rc;
3707}
35143eb5 3708
d324f08d
PS		 3709static unsigned int
3710num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
3711{
3712 int len;
3713 unsigned int entrycount = 0;
3714 unsigned int next_offset = 0;
56446f21
DC		 3715 char *entryptr;
3716 FILE_DIRECTORY_INFO *dir_info;
d324f08d
PS		 3717
3718 if (bufstart == NULL)
3719 return 0;
3720
56446f21 3721 entryptr = bufstart;
d324f08d
PS		 3722
3723 while (1) {
56446f21
DC		 3724 if (entryptr + next_offset < entryptr ||
3725 entryptr + next_offset > end_of_buf ||
3726 entryptr + next_offset + size > end_of_buf) {
f96637be 3727 cifs_dbg(VFS, "malformed search entry would overflow\n");
d324f08d
PS		 3728 break;
3729 }
3730
56446f21
DC		 3731 entryptr = entryptr + next_offset;
3732 dir_info = (FILE_DIRECTORY_INFO *)entryptr;
3733
3734 len = le32_to_cpu(dir_info->FileNameLength);
3735 if (entryptr + len < entryptr ||
3736 entryptr + len > end_of_buf ||
3737 entryptr + len + size > end_of_buf) {
f96637be
JP		 3738 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
3739 end_of_buf);
d324f08d
PS		 3740 break;
3741 }
3742
56446f21 3743 *lastentry = entryptr;
d324f08d
PS		 3744 entrycount++;
3745
56446f21 3746 next_offset = le32_to_cpu(dir_info->NextEntryOffset);
d324f08d
PS		 3747 if (!next_offset)
3748 break;
3749 }
3750
3751 return entrycount;
3752}
3753
3754/*
3755 * Readdir/FindFirst
3756 */
3757int
3758SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
3759 u64 persistent_fid, u64 volatile_fid, int index,
3760 struct cifs_search_info *srch_inf)
3761{
40eff45b 3762 struct smb_rqst rqst;
d324f08d
PS		 3763 struct smb2_query_directory_req *req;
3764 struct smb2_query_directory_rsp *rsp = NULL;
3765 struct kvec iov[2];
da502f7d 3766 struct kvec rsp_iov;
d324f08d
PS		 3767 int rc = 0;
3768 int len;
75fdfc84 3769 int resp_buftype = CIFS_NO_BUFFER;
d324f08d
PS		 3770 unsigned char *bufptr;
3771 struct TCP_Server_Info *server;
3772 struct cifs_ses *ses = tcon->ses;
3773 __le16 asteriks = cpu_to_le16('*');
3774 char *end_of_smb;
3775 unsigned int output_size = CIFSMaxBufSize;
3776 size_t info_buf_size;
7fb8986e 3777 int flags = 0;
7c00c3a6 3778 unsigned int total_len;
d324f08d
PS		 3779
3780 if (ses && (ses->server))
3781 server = ses->server;
3782 else
3783 return -EIO;
3784
7c00c3a6
RS		 3785 rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req,
3786 &total_len);
d324f08d
PS		 3787 if (rc)
3788 return rc;
3789
5a77e75f 3790 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3791 flags |= CIFS_TRANSFORM_REQ;
3792
d324f08d
PS		 3793 switch (srch_inf->info_level) {
3794 case SMB_FIND_FILE_DIRECTORY_INFO:
3795 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
3796 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
3797 break;
3798 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
3799 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
3800 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
3801 break;
3802 default:
f96637be
JP		 3803 cifs_dbg(VFS, "info level %u isn't supported\n",
3804 srch_inf->info_level);
d324f08d
PS		 3805 rc = -EINVAL;
3806 goto qdir_exit;
3807 }
3808
3809 req->FileIndex = cpu_to_le32(index);
3810 req->PersistentFileId = persistent_fid;
3811 req->VolatileFileId = volatile_fid;
3812
3813 len = 0x2;
3814 bufptr = req->Buffer;
3815 memcpy(bufptr, &asteriks, len);
3816
3817 req->FileNameOffset =
7c00c3a6 3818 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1);
d324f08d
PS		 3819 req->FileNameLength = cpu_to_le16(len);
3820 /*
3821 * BB could be 30 bytes or so longer if we used SMB2 specific
3822 * buffer lengths, but this is safe and close enough.
3823 */
3824 output_size = min_t(unsigned int, output_size, server->maxBuf);
3825 output_size = min_t(unsigned int, output_size, 2 << 15);
3826 req->OutputBufferLength = cpu_to_le32(output_size);
3827
3828 iov[0].iov_base = (char *)req;
7c00c3a6
RS		 3829 /* 1 for Buffer */
3830 iov[0].iov_len = total_len - 1;
d324f08d
PS		 3831
3832 iov[1].iov_base = (char *)(req->Buffer);
3833 iov[1].iov_len = len;
3834
40eff45b
RS		 3835 memset(&rqst, 0, sizeof(struct smb_rqst));
3836 rqst.rq_iov = iov;
3837 rqst.rq_nvec = 2;
3838
3839 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 3840 cifs_small_buf_release(req);
3841 rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
e5d04887 3842
d324f08d 3843 if (rc) {
31473fc4 3844 if (rc == -ENODATA &&
49f466bd 3845 rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
52755808
PS		 3846 srch_inf->endOfSearch = true;
3847 rc = 0;
8e6e72ae
PS		 3848 } else
3849 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
d324f08d
PS		 3850 goto qdir_exit;
3851 }
d324f08d 3852
730928c8
RS		 3853 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
3854 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
3855 info_buf_size);
d324f08d
PS		 3856 if (rc)
3857 goto qdir_exit;
3858
3859 srch_inf->unicode = true;
3860
3861 if (srch_inf->ntwrk_buf_start) {
3862 if (srch_inf->smallBuf)
3863 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
3864 else
3865 cifs_buf_release(srch_inf->ntwrk_buf_start);
3866 }
3867 srch_inf->ntwrk_buf_start = (char *)rsp;
977b6170
RS		 3868 srch_inf->srch_entries_start = srch_inf->last_entry =
3869 (char *)rsp + le16_to_cpu(rsp->OutputBufferOffset);
3870 end_of_smb = rsp_iov.iov_len + (char *)rsp;
d324f08d
PS		 3871 srch_inf->entries_in_buffer =
3872 num_entries(srch_inf->srch_entries_start, end_of_smb,
3873 &srch_inf->last_entry, info_buf_size);
3874 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
f96637be
JP		 3875 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
3876 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
3877 srch_inf->srch_entries_start, srch_inf->last_entry);
d324f08d
PS		 3878 if (resp_buftype == CIFS_LARGE_BUFFER)
3879 srch_inf->smallBuf = false;
3880 else if (resp_buftype == CIFS_SMALL_BUFFER)
3881 srch_inf->smallBuf = true;
3882 else
f96637be 3883 cifs_dbg(VFS, "illegal search buffer type\n");
d324f08d 3884
d324f08d
PS		 3885 return rc;
3886
3887qdir_exit:
3888 free_rsp_buf(resp_buftype, rsp);
3889 return rc;
3890}
3891
ba8ca116
RS		 3892int
3893SMB2_set_info_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
dac95340 3894 u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
ba8ca116 3895 u8 info_type, u32 additional_info,
dac95340 3896 void **data, unsigned int *size)
35143eb5
PS		 3897{
3898 struct smb2_set_info_req *req;
ba8ca116
RS		 3899 struct kvec *iov = rqst->rq_iov;
3900 unsigned int i, total_len;
3901 int rc;
35143eb5 3902
2fc803ef 3903 rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, (void **) &req, &total_len);
ba8ca116 3904 if (rc)
35143eb5 3905 return rc;
7fb8986e 3906
2fc803ef 3907 req->sync_hdr.ProcessId = cpu_to_le32(pid);
dac95340 3908 req->InfoType = info_type;
35143eb5
PS		 3909 req->FileInfoClass = info_class;
3910 req->PersistentFileId = persistent_fid;
3911 req->VolatileFileId = volatile_fid;
dac95340 3912 req->AdditionalInformation = cpu_to_le32(additional_info);
35143eb5 3913
35143eb5 3914 req->BufferOffset =
2fc803ef 3915 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1);
35143eb5
PS		 3916 req->BufferLength = cpu_to_le32(*size);
3917
35143eb5 3918 memcpy(req->Buffer, *data, *size);
2fc803ef 3919 total_len += *size;
35143eb5
PS		 3920
3921 iov[0].iov_base = (char *)req;
2fc803ef
RS		 3922 /* 1 for Buffer */
3923 iov[0].iov_len = total_len - 1;
35143eb5 3924
ba8ca116 3925 for (i = 1; i < rqst->rq_nvec; i++) {
35143eb5
PS		 3926 le32_add_cpu(&req->BufferLength, size[i]);
3927 iov[i].iov_base = (char *)data[i];
3928 iov[i].iov_len = size[i];
3929 }
3930
ba8ca116
RS		 3931 return 0;
3932}
3933
3934void
3935SMB2_set_info_free(struct smb_rqst *rqst)
3936{
32a1fb36
RS		 3937 if (rqst && rqst->rq_iov)
3938 cifs_buf_release(rqst->rq_iov[0].iov_base); /* request */
ba8ca116
RS		 3939}
3940
3941static int
3942send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
3943 u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
3944 u8 info_type, u32 additional_info, unsigned int num,
3945 void **data, unsigned int *size)
3946{
3947 struct smb_rqst rqst;
3948 struct smb2_set_info_rsp *rsp = NULL;
3949 struct kvec *iov;
3950 struct kvec rsp_iov;
3951 int rc = 0;
3952 int resp_buftype;
3953 struct cifs_ses *ses = tcon->ses;
3954 int flags = 0;
3955
3956 if (!ses || !(ses->server))
3957 return -EIO;
3958
3959 if (!num)
3960 return -EINVAL;
3961
3962 if (smb3_encryption_required(tcon))
3963 flags |= CIFS_TRANSFORM_REQ;
3964
3965 iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL);
3966 if (!iov)
3967 return -ENOMEM;
3968
40eff45b
RS		 3969 memset(&rqst, 0, sizeof(struct smb_rqst));
3970 rqst.rq_iov = iov;
3971 rqst.rq_nvec = num;
3972
ba8ca116
RS		 3973 rc = SMB2_set_info_init(tcon, &rqst, persistent_fid, volatile_fid, pid,
3974 info_class, info_type, additional_info,
3975 data, size);
3976 if (rc) {
3977 kfree(iov);
3978 return rc;
3979 }
3980
3981
40eff45b 3982 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
2fc803ef 3983 &rsp_iov);
ba8ca116 3984 SMB2_set_info_free(&rqst);
da502f7d 3985 rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
35143eb5 3986
eccb4422 3987 if (rc != 0) {
35143eb5 3988 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
eccb4422
SF		 3989 trace_smb3_set_info_err(xid, persistent_fid, tcon->tid,
3990 ses->Suid, info_class, (__u32)info_type, rc);
3991 }
7d3fb24b 3992
35143eb5
PS		 3993 free_rsp_buf(resp_buftype, rsp);
3994 kfree(iov);
3995 return rc;
3996}
3997
c839ff24
PS		 3998int
3999SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
3764cbd1 4000 u64 volatile_fid, u32 pid, __le64 *eof)
c839ff24
PS		 4001{
4002 struct smb2_file_eof_info info;
4003 void *data;
4004 unsigned int size;
4005
4006 info.EndOfFile = *eof;
4007
4008 data = &info;
4009 size = sizeof(struct smb2_file_eof_info);
4010
3764cbd1 4011 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 4012 pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE,
4013 0, 1, &data, &size);
c839ff24 4014}
1feeaac7 4015
dac95340
SP		 4016int
4017SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
4018 u64 persistent_fid, u64 volatile_fid,
4019 struct cifs_ntsd *pnntsd, int pacllen, int aclflag)
4020{
4021 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
4022 current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag,
4023 1, (void **)&pnntsd, &pacllen);
1feeaac7 4024}
983c88a4 4025
5517554e
RS		 4026int
4027SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
4028 u64 persistent_fid, u64 volatile_fid,
4029 struct smb2_file_full_ea_info *buf, int len)
4030{
4031 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
4032 current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE,
4033 0, 1, (void **)&buf, &len);
4034}
4035
983c88a4
PS		 4036int
4037SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
4038 const u64 persistent_fid, const u64 volatile_fid,
4039 __u8 oplock_level)
4040{
40eff45b 4041 struct smb_rqst rqst;
983c88a4 4042 int rc;
0d5a288d 4043 struct smb2_oplock_break *req = NULL;
21ad9487 4044 struct cifs_ses *ses = tcon->ses;
7fb8986e 4045 int flags = CIFS_OBREAK_OP;
21ad9487
RS		 4046 unsigned int total_len;
4047 struct kvec iov[1];
4048 struct kvec rsp_iov;
4049 int resp_buf_type;
983c88a4 4050
f96637be 4051 cifs_dbg(FYI, "SMB2_oplock_break\n");
21ad9487
RS		 4052 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
4053 &total_len);
983c88a4
PS		 4054 if (rc)
4055 return rc;
4056
5a77e75f 4057 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4058 flags |= CIFS_TRANSFORM_REQ;
4059
983c88a4
PS		 4060 req->VolatileFid = volatile_fid;
4061 req->PersistentFid = persistent_fid;
4062 req->OplockLevel = oplock_level;
21ad9487 4063 req->sync_hdr.CreditRequest = cpu_to_le16(1);
983c88a4 4064
21ad9487
RS		 4065 flags |= CIFS_NO_RESP;
4066
4067 iov[0].iov_base = (char *)req;
4068 iov[0].iov_len = total_len;
4069
40eff45b
RS		 4070 memset(&rqst, 0, sizeof(struct smb_rqst));
4071 rqst.rq_iov = iov;
4072 rqst.rq_nvec = 1;
4073
4074 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
da502f7d 4075 cifs_small_buf_release(req);
983c88a4
PS		 4076
4077 if (rc) {
4078 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 4079 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
983c88a4
PS		 4080 }
4081
4082 return rc;
4083}
6fc05c25 4084
730928c8
RS		 4085void
4086smb2_copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
4087 struct kstatfs *kst)
6fc05c25
PS		 4088{
4089 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
4090 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
4091 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
42bec214
SP		 4092 kst->f_bfree = kst->f_bavail =
4093 le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
6fc05c25
PS		 4094 return;
4095}
4096
2d304217
SF		 4097static void
4098copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO *response_data,
4099 struct kstatfs *kst)
4100{
4101 kst->f_bsize = le32_to_cpu(response_data->BlockSize);
4102 kst->f_blocks = le64_to_cpu(response_data->TotalBlocks);
4103 kst->f_bfree = le64_to_cpu(response_data->BlocksAvail);
4104 if (response_data->UserBlocksAvail == cpu_to_le64(-1))
4105 kst->f_bavail = kst->f_bfree;
4106 else
4107 kst->f_bavail = le64_to_cpu(response_data->UserBlocksAvail);
4108 if (response_data->TotalFileNodes != cpu_to_le64(-1))
4109 kst->f_files = le64_to_cpu(response_data->TotalFileNodes);
4110 if (response_data->FreeFileNodes != cpu_to_le64(-1))
4111 kst->f_ffree = le64_to_cpu(response_data->FreeFileNodes);
4112
4113 return;
4114}
2d304217 4115
6fc05c25
PS		 4116static int
4117build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
4118 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
4119{
4120 int rc;
4121 struct smb2_query_info_req *req;
b2fb7fec 4122 unsigned int total_len;
6fc05c25 4123
f96637be 4124 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
6fc05c25
PS		 4125
4126 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
4127 return -EIO;
4128
b2fb7fec
RS		 4129 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
4130 &total_len);
6fc05c25
PS		 4131 if (rc)
4132 return rc;
4133
4134 req->InfoType = SMB2_O_INFO_FILESYSTEM;
4135 req->FileInfoClass = level;
4136 req->PersistentFileId = persistent_fid;
4137 req->VolatileFileId = volatile_fid;
b2fb7fec 4138 /* 1 for pad */
6fc05c25 4139 req->InputBufferOffset =
b2fb7fec 4140 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1);
6fc05c25 4141 req->OutputBufferLength = cpu_to_le32(
1fc6ad2f 4142 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1);
6fc05c25
PS		 4143
4144 iov->iov_base = (char *)req;
b2fb7fec 4145 iov->iov_len = total_len;
6fc05c25
PS		 4146 return 0;
4147}
4148
2d304217
SF		 4149int
4150SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon,
4151 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
4152{
4153 struct smb_rqst rqst;
4154 struct smb2_query_info_rsp *rsp = NULL;
4155 struct kvec iov;
4156 struct kvec rsp_iov;
4157 int rc = 0;
4158 int resp_buftype;
4159 struct cifs_ses *ses = tcon->ses;
4160 FILE_SYSTEM_POSIX_INFO *info = NULL;
4161 int flags = 0;
4162
4163 rc = build_qfs_info_req(&iov, tcon, FS_POSIX_INFORMATION,
4164 sizeof(FILE_SYSTEM_POSIX_INFO),
4165 persistent_fid, volatile_fid);
4166 if (rc)
4167 return rc;
4168
4169 if (smb3_encryption_required(tcon))
4170 flags |= CIFS_TRANSFORM_REQ;
4171
4172 memset(&rqst, 0, sizeof(struct smb_rqst));
4173 rqst.rq_iov = &iov;
4174 rqst.rq_nvec = 1;
4175
4176 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
4177 cifs_small_buf_release(iov.iov_base);
4178 if (rc) {
4179 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
4180 goto posix_qfsinf_exit;
4181 }
4182 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
4183
4184 info = (FILE_SYSTEM_POSIX_INFO *)(
4185 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
730928c8
RS		 4186 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
4187 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
4188 sizeof(FILE_SYSTEM_POSIX_INFO));
2d304217
SF		 4189 if (!rc)
4190 copy_posix_fs_info_to_kstatfs(info, fsdata);
4191
4192posix_qfsinf_exit:
4193 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
4194 return rc;
4195}
2d304217 4196
6fc05c25
PS		 4197int
4198SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
4199 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
4200{
40eff45b 4201 struct smb_rqst rqst;
6fc05c25
PS		 4202 struct smb2_query_info_rsp *rsp = NULL;
4203 struct kvec iov;
da502f7d 4204 struct kvec rsp_iov;
6fc05c25
PS		 4205 int rc = 0;
4206 int resp_buftype;
4207 struct cifs_ses *ses = tcon->ses;
4208 struct smb2_fs_full_size_info *info = NULL;
7fb8986e 4209 int flags = 0;
6fc05c25
PS		 4210
4211 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
4212 sizeof(struct smb2_fs_full_size_info),
4213 persistent_fid, volatile_fid);
4214 if (rc)
4215 return rc;
4216
5a77e75f 4217 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4218 flags |= CIFS_TRANSFORM_REQ;
4219
40eff45b
RS		 4220 memset(&rqst, 0, sizeof(struct smb_rqst));
4221 rqst.rq_iov = &iov;
4222 rqst.rq_nvec = 1;
4223
4224 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 4225 cifs_small_buf_release(iov.iov_base);
6fc05c25
PS		 4226 if (rc) {
4227 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
34f62640 4228 goto qfsinf_exit;
6fc05c25 4229 }
da502f7d 4230 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
6fc05c25 4231
1fc6ad2f 4232 info = (struct smb2_fs_full_size_info *)(
49f466bd 4233 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
730928c8
RS		 4234 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
4235 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
4236 sizeof(struct smb2_fs_full_size_info));
6fc05c25 4237 if (!rc)
730928c8 4238 smb2_copy_fs_info_to_kstatfs(info, fsdata);
6fc05c25 4239
34f62640 4240qfsinf_exit:
da502f7d 4241 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
34f62640
SF		 4242 return rc;
4243}
4244
4245int
4246SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2167114c 4247 u64 persistent_fid, u64 volatile_fid, int level)
34f62640 4248{
40eff45b 4249 struct smb_rqst rqst;
34f62640
SF		 4250 struct smb2_query_info_rsp *rsp = NULL;
4251 struct kvec iov;
da502f7d 4252 struct kvec rsp_iov;
34f62640 4253 int rc = 0;
2167114c 4254 int resp_buftype, max_len, min_len;
34f62640
SF		 4255 struct cifs_ses *ses = tcon->ses;
4256 unsigned int rsp_len, offset;
7fb8986e 4257 int flags = 0;
34f62640 4258
2167114c
SF		 4259 if (level == FS_DEVICE_INFORMATION) {
4260 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
4261 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
4262 } else if (level == FS_ATTRIBUTE_INFORMATION) {
4263 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
4264 min_len = MIN_FS_ATTR_INFO_SIZE;
af6a12ea
SF		 4265 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
4266 max_len = sizeof(struct smb3_fs_ss_info);
4267 min_len = sizeof(struct smb3_fs_ss_info);
21ba3845
SF		 4268 } else if (level == FS_VOLUME_INFORMATION) {
4269 max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN;
4270 min_len = sizeof(struct smb3_fs_vol_info);
2167114c 4271 } else {
af6a12ea 4272 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2167114c
SF		 4273 return -EINVAL;
4274 }
4275
4276 rc = build_qfs_info_req(&iov, tcon, level, max_len,
34f62640
SF		 4277 persistent_fid, volatile_fid);
4278 if (rc)
4279 return rc;
4280
5a77e75f 4281 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4282 flags |= CIFS_TRANSFORM_REQ;
4283
40eff45b
RS		 4284 memset(&rqst, 0, sizeof(struct smb_rqst));
4285 rqst.rq_iov = &iov;
4286 rqst.rq_nvec = 1;
4287
4288 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 4289 cifs_small_buf_release(iov.iov_base);
34f62640
SF		 4290 if (rc) {
4291 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
4292 goto qfsattr_exit;
4293 }
da502f7d 4294 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
34f62640
SF		 4295
4296 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
4297 offset = le16_to_cpu(rsp->OutputBufferOffset);
730928c8 4298 rc = smb2_validate_iov(offset, rsp_len, &rsp_iov, min_len);
2167114c
SF		 4299 if (rc)
4300 goto qfsattr_exit;
4301
4302 if (level == FS_ATTRIBUTE_INFORMATION)
1fc6ad2f 4303 memcpy(&tcon->fsAttrInfo, offset
49f466bd 4304 + (char *)rsp, min_t(unsigned int,
2167114c
SF		 4305 rsp_len, max_len));
4306 else if (level == FS_DEVICE_INFORMATION)
1fc6ad2f 4307 memcpy(&tcon->fsDevInfo, offset
49f466bd 4308 + (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO));
af6a12ea
SF		 4309 else if (level == FS_SECTOR_SIZE_INFORMATION) {
4310 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
1fc6ad2f 4311 (offset + (char *)rsp);
af6a12ea
SF		 4312 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
4313 tcon->perf_sector_size =
4314 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
21ba3845
SF		 4315 } else if (level == FS_VOLUME_INFORMATION) {
4316 struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *)
4317 (offset + (char *)rsp);
4318 tcon->vol_serial_number = vol_info->VolumeSerialNumber;
4319 tcon->vol_create_time = vol_info->VolumeCreationTime;
af6a12ea 4320 }
34f62640
SF		 4321
4322qfsattr_exit:
da502f7d 4323 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
6fc05c25
PS		 4324 return rc;
4325}
f7ba7fe6
PS		 4326
4327int
4328smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
4329 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
4330 const __u32 num_lock, struct smb2_lock_element *buf)
4331{
40eff45b 4332 struct smb_rqst rqst;
f7ba7fe6
PS		 4333 int rc = 0;
4334 struct smb2_lock_req *req = NULL;
4335 struct kvec iov[2];
da502f7d 4336 struct kvec rsp_iov;
f7ba7fe6
PS		 4337 int resp_buf_type;
4338 unsigned int count;
7fb8986e 4339 int flags = CIFS_NO_RESP;
ced93679 4340 unsigned int total_len;
f7ba7fe6 4341
f96637be 4342 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
f7ba7fe6 4343
ced93679 4344 rc = smb2_plain_req_init(SMB2_LOCK, tcon, (void **) &req, &total_len);
f7ba7fe6
PS		 4345 if (rc)
4346 return rc;
4347
5a77e75f 4348 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4349 flags |= CIFS_TRANSFORM_REQ;
4350
ced93679 4351 req->sync_hdr.ProcessId = cpu_to_le32(pid);
f7ba7fe6
PS		 4352 req->LockCount = cpu_to_le16(num_lock);
4353
4354 req->PersistentFileId = persist_fid;
4355 req->VolatileFileId = volatile_fid;
4356
4357 count = num_lock * sizeof(struct smb2_lock_element);
f7ba7fe6
PS		 4358
4359 iov[0].iov_base = (char *)req;
ced93679 4360 iov[0].iov_len = total_len - sizeof(struct smb2_lock_element);
f7ba7fe6
PS		 4361 iov[1].iov_base = (char *)buf;
4362 iov[1].iov_len = count;
4363
4364 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
40eff45b
RS		 4365
4366 memset(&rqst, 0, sizeof(struct smb_rqst));
4367 rqst.rq_iov = iov;
4368 rqst.rq_nvec = 2;
4369
4370 rc = cifs_send_recv(xid, tcon->ses, &rqst, &resp_buf_type, flags,
ced93679 4371 &rsp_iov);
da502f7d 4372 cifs_small_buf_release(req);
f7ba7fe6 4373 if (rc) {
f96637be 4374 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
f7ba7fe6 4375 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
eccb4422
SF		 4376 trace_smb3_lock_err(xid, persist_fid, tcon->tid,
4377 tcon->ses->Suid, rc);
f7ba7fe6
PS		 4378 }
4379
4380 return rc;
4381}
4382
4383int
4384SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
4385 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
4386 const __u64 length, const __u64 offset, const __u32 lock_flags,
4387 const bool wait)
4388{
4389 struct smb2_lock_element lock;
4390
4391 lock.Offset = cpu_to_le64(offset);
4392 lock.Length = cpu_to_le64(length);
4393 lock.Flags = cpu_to_le32(lock_flags);
4394 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
4395 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
4396
4397 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
4398}
0822f514
PS		 4399
4400int
4401SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
4402 __u8 *lease_key, const __le32 lease_state)
4403{
40eff45b 4404 struct smb_rqst rqst;
0822f514
PS		 4405 int rc;
4406 struct smb2_lease_ack *req = NULL;
8eb7998e 4407 struct cifs_ses *ses = tcon->ses;
7fb8986e 4408 int flags = CIFS_OBREAK_OP;
8eb7998e
RS		 4409 unsigned int total_len;
4410 struct kvec iov[1];
4411 struct kvec rsp_iov;
4412 int resp_buf_type;
179e44d4
SF		 4413 __u64 *please_key_high;
4414 __u64 *please_key_low;
0822f514 4415
f96637be 4416 cifs_dbg(FYI, "SMB2_lease_break\n");
8eb7998e
RS		 4417 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
4418 &total_len);
0822f514
PS		 4419 if (rc)
4420 return rc;
4421
5a77e75f 4422 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4423 flags |= CIFS_TRANSFORM_REQ;
4424
8eb7998e 4425 req->sync_hdr.CreditRequest = cpu_to_le16(1);
0822f514 4426 req->StructureSize = cpu_to_le16(36);
8eb7998e 4427 total_len += 12;
0822f514
PS		 4428
4429 memcpy(req->LeaseKey, lease_key, 16);
4430 req->LeaseState = lease_state;
4431
8eb7998e
RS		 4432 flags |= CIFS_NO_RESP;
4433
4434 iov[0].iov_base = (char *)req;
4435 iov[0].iov_len = total_len;
4436
40eff45b
RS		 4437 memset(&rqst, 0, sizeof(struct smb_rqst));
4438 rqst.rq_iov = iov;
4439 rqst.rq_nvec = 1;
4440
4441 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
da502f7d 4442 cifs_small_buf_release(req);
0822f514 4443
d339adc1
AA		 4444 please_key_low = (__u64 *)lease_key;
4445 please_key_high = (__u64 *)(lease_key+8);
0822f514
PS		 4446 if (rc) {
4447 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
179e44d4
SF		 4448 trace_smb3_lease_err(le32_to_cpu(lease_state), tcon->tid,
4449 ses->Suid, *please_key_low, *please_key_high, rc);
f96637be 4450 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
179e44d4
SF		 4451 } else
4452 trace_smb3_lease_done(le32_to_cpu(lease_state), tcon->tid,
4453 ses->Suid, *please_key_low, *please_key_high);
0822f514
PS		 4454
4455 return rc;
4456}
Linux 6.x block layer and io_uring tree(s)