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smb3: display stats counters for number of slow commands
[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"
ec2e4523
PS		 53
54/*
55 * The following table defines the expected "StructureSize" of SMB2 requests
56 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
57 *
58 * Note that commands are defined in smb2pdu.h in le16 but the array below is
59 * indexed by command in host byte order.
60 */
61static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
62 /* SMB2_NEGOTIATE */ 36,
63 /* SMB2_SESSION_SETUP */ 25,
64 /* SMB2_LOGOFF */ 4,
65 /* SMB2_TREE_CONNECT */ 9,
66 /* SMB2_TREE_DISCONNECT */ 4,
67 /* SMB2_CREATE */ 57,
68 /* SMB2_CLOSE */ 24,
69 /* SMB2_FLUSH */ 24,
70 /* SMB2_READ */ 49,
71 /* SMB2_WRITE */ 49,
72 /* SMB2_LOCK */ 48,
73 /* SMB2_IOCTL */ 57,
74 /* SMB2_CANCEL */ 4,
75 /* SMB2_ECHO */ 4,
76 /* SMB2_QUERY_DIRECTORY */ 33,
77 /* SMB2_CHANGE_NOTIFY */ 32,
78 /* SMB2_QUERY_INFO */ 41,
79 /* SMB2_SET_INFO */ 33,
80 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
81};
82
5a77e75f 83static int smb3_encryption_required(const struct cifs_tcon *tcon)
7fb8986e 84{
ae6f8dd4
PS		 85 if (!tcon)
86 return 0;
7fb8986e
PS		 87 if ((tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
88 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
89 return 1;
ae6f8dd4
PS		 90 if (tcon->seal &&
91 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
92 return 1;
7fb8986e
PS		 93 return 0;
94}
ec2e4523
PS		 95
96static void
cb200bd6 97smb2_hdr_assemble(struct smb2_sync_hdr *shdr, __le16 smb2_cmd,
ec2e4523
PS		 98 const struct cifs_tcon *tcon)
99{
31473fc4
PS		 100 shdr->ProtocolId = SMB2_PROTO_NUMBER;
101 shdr->StructureSize = cpu_to_le16(64);
102 shdr->Command = smb2_cmd;
7d414f39
RL		 103 if (tcon && tcon->ses && tcon->ses->server) {
104 struct TCP_Server_Info *server = tcon->ses->server;
105
106 spin_lock(&server->req_lock);
107 /* Request up to 2 credits but don't go over the limit. */
141891f4 108 if (server->credits >= server->max_credits)
31473fc4 109 shdr->CreditRequest = cpu_to_le16(0);
7d414f39 110 else
31473fc4 111 shdr->CreditRequest = cpu_to_le16(
141891f4 112 min_t(int, server->max_credits -
7d414f39
RL		 113 server->credits, 2));
114 spin_unlock(&server->req_lock);
115 } else {
31473fc4 116 shdr->CreditRequest = cpu_to_le16(2);
7d414f39 117 }
31473fc4 118 shdr->ProcessId = cpu_to_le32((__u16)current->tgid);
ec2e4523
PS		 119
120 if (!tcon)
121 goto out;
122
2b80d049
SF		 123 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
124 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
1dc92c45 125 if ((tcon->ses) && (tcon->ses->server) &&
84ceeb96 126 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
31473fc4 127 shdr->CreditCharge = cpu_to_le16(1);
2b80d049
SF		 128 /* else CreditCharge MBZ */
129
31473fc4 130 shdr->TreeId = tcon->tid;
ec2e4523
PS		 131 /* Uid is not converted */
132 if (tcon->ses)
31473fc4 133 shdr->SessionId = tcon->ses->Suid;
f87ab88b
SF		 134
135 /*
136 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
137 * to pass the path on the Open SMB prefixed by \\server\share.
138 * Not sure when we would need to do the augmented path (if ever) and
139 * setting this flag breaks the SMB2 open operation since it is
140 * illegal to send an empty path name (without \\server\share prefix)
141 * when the DFS flag is set in the SMB open header. We could
142 * consider setting the flag on all operations other than open
143 * but it is safer to net set it for now.
144 */
145/* if (tcon->share_flags & SHI1005_FLAGS_DFS)
31473fc4 146 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
f87ab88b 147
7fb8986e 148 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign &&
5a77e75f 149 !smb3_encryption_required(tcon))
31473fc4 150 shdr->Flags |= SMB2_FLAGS_SIGNED;
ec2e4523 151out:
ec2e4523
PS		 152 return;
153}
154
155static int
156smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
157{
7ffbe655 158 int rc;
aa24d1e9
PS		 159 struct nls_table *nls_codepage;
160 struct cifs_ses *ses;
161 struct TCP_Server_Info *server;
162
163 /*
164 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
165 * check for tcp and smb session status done differently
166 * for those three - in the calling routine.
167 */
168 if (tcon == NULL)
7ffbe655 169 return 0;
aa24d1e9
PS		 170
171 if (smb2_command == SMB2_TREE_CONNECT)
7ffbe655 172 return 0;
aa24d1e9
PS		 173
174 if (tcon->tidStatus == CifsExiting) {
175 /*
176 * only tree disconnect, open, and write,
177 * (and ulogoff which does not have tcon)
178 * are allowed as we start force umount.
179 */
180 if ((smb2_command != SMB2_WRITE) &&
181 (smb2_command != SMB2_CREATE) &&
182 (smb2_command != SMB2_TREE_DISCONNECT)) {
f96637be
JP		 183 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
184 smb2_command);
aa24d1e9
PS		 185 return -ENODEV;
186 }
187 }
188 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
189 (!tcon->ses->server))
190 return -EIO;
191
192 ses = tcon->ses;
193 server = ses->server;
194
195 /*
196 * Give demultiplex thread up to 10 seconds to reconnect, should be
197 * greater than cifs socket timeout which is 7 seconds
198 */
199 while (server->tcpStatus == CifsNeedReconnect) {
200 /*
201 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
202 * here since they are implicitly done when session drops.
203 */
204 switch (smb2_command) {
205 /*
206 * BB Should we keep oplock break and add flush to exceptions?
207 */
208 case SMB2_TREE_DISCONNECT:
209 case SMB2_CANCEL:
210 case SMB2_CLOSE:
211 case SMB2_OPLOCK_BREAK:
212 return -EAGAIN;
213 }
214
7ffbe655
PA		 215 rc = wait_event_interruptible_timeout(server->response_q,
216 (server->tcpStatus != CifsNeedReconnect),
217 10 * HZ);
218 if (rc < 0) {
219 cifs_dbg(FYI, "%s: aborting reconnect due to a received"
220 " signal by the process\n", __func__);
221 return -ERESTARTSYS;
222 }
aa24d1e9
PS		 223
224 /* are we still trying to reconnect? */
225 if (server->tcpStatus != CifsNeedReconnect)
226 break;
227
228 /*
229 * on "soft" mounts we wait once. Hard mounts keep
230 * retrying until process is killed or server comes
231 * back on-line
232 */
233 if (!tcon->retry) {
f96637be 234 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
aa24d1e9
PS		 235 return -EHOSTDOWN;
236 }
237 }
238
239 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
7ffbe655 240 return 0;
aa24d1e9
PS		 241
242 nls_codepage = load_nls_default();
243
244 /*
245 * need to prevent multiple threads trying to simultaneously reconnect
246 * the same SMB session
247 */
248 mutex_lock(&tcon->ses->session_mutex);
76e75270
SC		 249
250 /*
251 * Recheck after acquire mutex. If another thread is negotiating
252 * and the server never sends an answer the socket will be closed
253 * and tcpStatus set to reconnect.
254 */
255 if (server->tcpStatus == CifsNeedReconnect) {
256 rc = -EHOSTDOWN;
257 mutex_unlock(&tcon->ses->session_mutex);
258 goto out;
259 }
260
aa24d1e9
PS		 261 rc = cifs_negotiate_protocol(0, tcon->ses);
262 if (!rc && tcon->ses->need_reconnect)
263 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
264
265 if (rc || !tcon->need_reconnect) {
266 mutex_unlock(&tcon->ses->session_mutex);
267 goto out;
268 }
269
270 cifs_mark_open_files_invalid(tcon);
96a988ff
PS		 271 if (tcon->use_persistent)
272 tcon->need_reopen_files = true;
52ace1ef 273
aa24d1e9
PS		 274 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
275 mutex_unlock(&tcon->ses->session_mutex);
52ace1ef 276
f96637be 277 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
c318e6c2
SF		 278 if (rc) {
279 /* If sess reconnected but tcon didn't, something strange ... */
280 printk_once(KERN_WARNING "reconnect tcon failed rc = %d\n", rc);
aa24d1e9 281 goto out;
c318e6c2 282 }
96a988ff
PS		 283
284 if (smb2_command != SMB2_INTERNAL_CMD)
285 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
286
aa24d1e9 287 atomic_inc(&tconInfoReconnectCount);
aa24d1e9
PS		 288out:
289 /*
290 * Check if handle based operation so we know whether we can continue
291 * or not without returning to caller to reset file handle.
292 */
293 /*
294 * BB Is flush done by server on drop of tcp session? Should we special
295 * case it and skip above?
296 */
297 switch (smb2_command) {
298 case SMB2_FLUSH:
299 case SMB2_READ:
300 case SMB2_WRITE:
301 case SMB2_LOCK:
302 case SMB2_IOCTL:
303 case SMB2_QUERY_DIRECTORY:
304 case SMB2_CHANGE_NOTIFY:
305 case SMB2_QUERY_INFO:
306 case SMB2_SET_INFO:
4772c795 307 rc = -EAGAIN;
aa24d1e9
PS		 308 }
309 unload_nls(nls_codepage);
ec2e4523
PS		 310 return rc;
311}
312
cb200bd6
PS		 313static void
314fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, void *buf,
315 unsigned int *total_len)
316{
317 struct smb2_sync_pdu *spdu = (struct smb2_sync_pdu *)buf;
318 /* lookup word count ie StructureSize from table */
319 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)];
320
321 /*
322 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
323 * largest operations (Create)
324 */
325 memset(buf, 0, 256);
326
327 smb2_hdr_assemble(&spdu->sync_hdr, smb2_command, tcon);
328 spdu->StructureSize2 = cpu_to_le16(parmsize);
329
330 *total_len = parmsize + sizeof(struct smb2_sync_hdr);
331}
332
ec2e4523
PS		 333/*
334 * Allocate and return pointer to an SMB request hdr, and set basic
335 * SMB information in the SMB header. If the return code is zero, this
305428ac 336 * function must have filled in request_buf pointer.
ec2e4523
PS		 337 */
338static int
305428ac
RS		 339smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
340 void **request_buf, unsigned int *total_len)
ec2e4523 341{
cb200bd6 342 int rc;
ec2e4523
PS		 343
344 rc = smb2_reconnect(smb2_command, tcon);
345 if (rc)
346 return rc;
347
348 /* BB eventually switch this to SMB2 specific small buf size */
f46ecbd9
SB		 349 if (smb2_command == SMB2_SET_INFO)
350 *request_buf = cifs_buf_get();
351 else
352 *request_buf = cifs_small_buf_get();
ec2e4523
PS		 353 if (*request_buf == NULL) {
354 /* BB should we add a retry in here if not a writepage? */
355 return -ENOMEM;
356 }
357
305428ac
RS		 358 fill_small_buf(smb2_command, tcon,
359 (struct smb2_sync_hdr *)(*request_buf),
360 total_len);
ec2e4523
PS		 361
362 if (tcon != NULL) {
ec2e4523
PS		 363 uint16_t com_code = le16_to_cpu(smb2_command);
364 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
ec2e4523
PS		 365 cifs_stats_inc(&tcon->num_smbs_sent);
366 }
367
368 return rc;
369}
370
0fdfef9a 371
13cacea7
RS		 372/* offset is sizeof smb2_negotiate_req but rounded up to 8 bytes */
373#define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) */
ebb3a9d4
SF		 374
375
376#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
377#define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
fcef0db6 378#define SMB2_POSIX_EXTENSIONS_AVAILABLE cpu_to_le16(0x100)
ebb3a9d4
SF		 379
380static void
381build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
382{
383 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
384 pneg_ctxt->DataLength = cpu_to_le16(38);
385 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
386 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
387 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
388 pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
389}
390
391static void
392build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
393{
394 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
23657ad7
SF		 395 pneg_ctxt->DataLength = cpu_to_le16(4); /* Cipher Count + le16 cipher */
396 pneg_ctxt->CipherCount = cpu_to_le16(1);
397/* pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;*/ /* not supported yet */
398 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_CCM;
ebb3a9d4
SF		 399}
400
fcef0db6
SF		 401static void
402build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
403{
404 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
405 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
406}
407
ebb3a9d4 408static void
13cacea7
RS		 409assemble_neg_contexts(struct smb2_negotiate_req *req,
410 unsigned int *total_len)
ebb3a9d4 411{
13cacea7 412 char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT;
fcef0db6 413 unsigned int ctxt_len;
ebb3a9d4 414
fcef0db6 415 *total_len += 2; /* Add 2 due to round to 8 byte boundary for 1st ctxt */
ebb3a9d4 416 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
fcef0db6
SF		 417 ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_preauth_neg_context), 8) * 8;
418 *total_len += ctxt_len;
419 pneg_ctxt += ctxt_len;
13cacea7 420
ebb3a9d4 421 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
fcef0db6
SF		 422 ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_encryption_neg_context), 8) * 8;
423 *total_len += ctxt_len;
424 pneg_ctxt += ctxt_len;
425
426 build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
427 *total_len += sizeof(struct smb2_posix_neg_context);
13cacea7 428
fcef0db6
SF		 429 req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
430 req->NegotiateContextCount = cpu_to_le16(3);
ebb3a9d4 431}
5100d8a3
SF		 432
433static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt)
434{
435 unsigned int len = le16_to_cpu(ctxt->DataLength);
436
437 /* If invalid preauth context warn but use what we requested, SHA-512 */
438 if (len < MIN_PREAUTH_CTXT_DATA_LEN) {
439 printk_once(KERN_WARNING "server sent bad preauth context\n");
440 return;
441 }
442 if (le16_to_cpu(ctxt->HashAlgorithmCount) != 1)
443 printk_once(KERN_WARNING "illegal SMB3 hash algorithm count\n");
444 if (ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
445 printk_once(KERN_WARNING "unknown SMB3 hash algorithm\n");
446}
447
448static int decode_encrypt_ctx(struct TCP_Server_Info *server,
449 struct smb2_encryption_neg_context *ctxt)
450{
451 unsigned int len = le16_to_cpu(ctxt->DataLength);
452
453 cifs_dbg(FYI, "decode SMB3.11 encryption neg context of len %d\n", len);
454 if (len < MIN_ENCRYPT_CTXT_DATA_LEN) {
455 printk_once(KERN_WARNING "server sent bad crypto ctxt len\n");
456 return -EINVAL;
457 }
458
459 if (le16_to_cpu(ctxt->CipherCount) != 1) {
460 printk_once(KERN_WARNING "illegal SMB3.11 cipher count\n");
461 return -EINVAL;
462 }
463 cifs_dbg(FYI, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt->Ciphers[0]));
464 if ((ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_CCM) &&
465 (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_GCM)) {
466 printk_once(KERN_WARNING "invalid SMB3.11 cipher returned\n");
467 return -EINVAL;
468 }
469 server->cipher_type = ctxt->Ciphers[0];
23657ad7 470 server->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
5100d8a3
SF		 471 return 0;
472}
473
474static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp,
977b6170
RS		 475 struct TCP_Server_Info *server,
476 unsigned int len_of_smb)
5100d8a3
SF		 477{
478 struct smb2_neg_context *pctx;
479 unsigned int offset = le32_to_cpu(rsp->NegotiateContextOffset);
480 unsigned int ctxt_cnt = le16_to_cpu(rsp->NegotiateContextCount);
5100d8a3
SF		 481 unsigned int len_of_ctxts, i;
482 int rc = 0;
483
484 cifs_dbg(FYI, "decoding %d negotiate contexts\n", ctxt_cnt);
485 if (len_of_smb <= offset) {
486 cifs_dbg(VFS, "Invalid response: negotiate context offset\n");
487 return -EINVAL;
488 }
489
490 len_of_ctxts = len_of_smb - offset;
491
492 for (i = 0; i < ctxt_cnt; i++) {
493 int clen;
494 /* check that offset is not beyond end of SMB */
495 if (len_of_ctxts == 0)
496 break;
497
498 if (len_of_ctxts < sizeof(struct smb2_neg_context))
499 break;
500
1fc6ad2f 501 pctx = (struct smb2_neg_context *)(offset + (char *)rsp);
5100d8a3
SF		 502 clen = le16_to_cpu(pctx->DataLength);
503 if (clen > len_of_ctxts)
504 break;
505
506 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES)
507 decode_preauth_context(
508 (struct smb2_preauth_neg_context *)pctx);
509 else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES)
510 rc = decode_encrypt_ctx(server,
511 (struct smb2_encryption_neg_context *)pctx);
fcef0db6
SF		 512 else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE)
513 server->posix_ext_supported = true;
5100d8a3
SF		 514 else
515 cifs_dbg(VFS, "unknown negcontext of type %d ignored\n",
516 le16_to_cpu(pctx->ContextType));
517
518 if (rc)
519 break;
520 /* offsets must be 8 byte aligned */
521 clen = (clen + 7) & ~0x7;
522 offset += clen + sizeof(struct smb2_neg_context);
523 len_of_ctxts -= clen;
524 }
525 return rc;
526}
527
ce558b0e
SF		 528static struct create_posix *
529create_posix_buf(umode_t mode)
530{
531 struct create_posix *buf;
532
533 buf = kzalloc(sizeof(struct create_posix),
534 GFP_KERNEL);
535 if (!buf)
536 return NULL;
537
538 buf->ccontext.DataOffset =
539 cpu_to_le16(offsetof(struct create_posix, Mode));
540 buf->ccontext.DataLength = cpu_to_le32(4);
541 buf->ccontext.NameOffset =
542 cpu_to_le16(offsetof(struct create_posix, Name));
543 buf->ccontext.NameLength = cpu_to_le16(16);
544
545 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
546 buf->Name[0] = 0x93;
547 buf->Name[1] = 0xAD;
548 buf->Name[2] = 0x25;
549 buf->Name[3] = 0x50;
550 buf->Name[4] = 0x9C;
551 buf->Name[5] = 0xB4;
552 buf->Name[6] = 0x11;
553 buf->Name[7] = 0xE7;
554 buf->Name[8] = 0xB4;
555 buf->Name[9] = 0x23;
556 buf->Name[10] = 0x83;
557 buf->Name[11] = 0xDE;
558 buf->Name[12] = 0x96;
559 buf->Name[13] = 0x8B;
560 buf->Name[14] = 0xCD;
561 buf->Name[15] = 0x7C;
562 buf->Mode = cpu_to_le32(mode);
563 cifs_dbg(FYI, "mode on posix create 0%o", mode);
564 return buf;
565}
566
567static int
568add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode)
569{
570 struct smb2_create_req *req = iov[0].iov_base;
571 unsigned int num = *num_iovec;
572
573 iov[num].iov_base = create_posix_buf(mode);
574 if (iov[num].iov_base == NULL)
575 return -ENOMEM;
576 iov[num].iov_len = sizeof(struct create_posix);
577 if (!req->CreateContextsOffset)
578 req->CreateContextsOffset = cpu_to_le32(
579 sizeof(struct smb2_create_req) +
580 iov[num - 1].iov_len);
581 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_posix));
582 *num_iovec = num + 1;
583 return 0;
584}
585
ebb3a9d4 586
ec2e4523
PS		 587/*
588 *
589 * SMB2 Worker functions follow:
590 *
591 * The general structure of the worker functions is:
592 * 1) Call smb2_init (assembles SMB2 header)
593 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
594 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
595 * 4) Decode SMB2 command specific fields in the fixed length area
596 * 5) Decode variable length data area (if any for this SMB2 command type)
597 * 6) Call free smb buffer
598 * 7) return
599 *
600 */
601
602int
603SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
604{
40eff45b 605 struct smb_rqst rqst;
ec2e4523
PS		 606 struct smb2_negotiate_req *req;
607 struct smb2_negotiate_rsp *rsp;
608 struct kvec iov[1];
da502f7d 609 struct kvec rsp_iov;
ec2e4523
PS		 610 int rc = 0;
611 int resp_buftype;
3534b850 612 struct TCP_Server_Info *server = ses->server;
ec2e4523
PS		 613 int blob_offset, blob_length;
614 char *security_blob;
615 int flags = CIFS_NEG_OP;
13cacea7 616 unsigned int total_len;
ec2e4523 617
f96637be 618 cifs_dbg(FYI, "Negotiate protocol\n");
ec2e4523 619
3534b850
JL		 620 if (!server) {
621 WARN(1, "%s: server is NULL!\n", __func__);
622 return -EIO;
ec2e4523
PS		 623 }
624
13cacea7 625 rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, (void **) &req, &total_len);
ec2e4523
PS		 626 if (rc)
627 return rc;
628
13cacea7 629 req->sync_hdr.SessionId = 0;
0fdfef9a 630
8bd68c6e
AA		 631 memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
632 memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
ec2e4523 633
9764c02f
SF		 634 if (strcmp(ses->server->vals->version_string,
635 SMB3ANY_VERSION_STRING) == 0) {
636 req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
637 req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
638 req->DialectCount = cpu_to_le16(2);
13cacea7 639 total_len += 4;
9764c02f
SF		 640 } else if (strcmp(ses->server->vals->version_string,
641 SMBDEFAULT_VERSION_STRING) == 0) {
642 req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
643 req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
644 req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
645 req->DialectCount = cpu_to_le16(3);
13cacea7 646 total_len += 6;
9764c02f
SF		 647 } else {
648 /* otherwise send specific dialect */
649 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
650 req->DialectCount = cpu_to_le16(1);
13cacea7 651 total_len += 2;
9764c02f 652 }
ec2e4523
PS		 653
654 /* only one of SMB2 signing flags may be set in SMB2 request */
38d77c50 655 if (ses->sign)
9cd2e62c 656 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
38d77c50 657 else if (global_secflags & CIFSSEC_MAY_SIGN)
9cd2e62c 658 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
38d77c50
JL		 659 else
660 req->SecurityMode = 0;
ec2e4523 661
e4aa25e7 662 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
ec2e4523 663
3c5f9be1
SF		 664 /* ClientGUID must be zero for SMB2.02 dialect */
665 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
666 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
ebb3a9d4 667 else {
3c5f9be1
SF		 668 memcpy(req->ClientGUID, server->client_guid,
669 SMB2_CLIENT_GUID_SIZE);
ebb3a9d4 670 if (ses->server->vals->protocol_id == SMB311_PROT_ID)
13cacea7 671 assemble_neg_contexts(req, &total_len);
ebb3a9d4 672 }
ec2e4523 673 iov[0].iov_base = (char *)req;
13cacea7 674 iov[0].iov_len = total_len;
ec2e4523 675
40eff45b
RS		 676 memset(&rqst, 0, sizeof(struct smb_rqst));
677 rqst.rq_iov = iov;
678 rqst.rq_nvec = 1;
679
680 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 681 cifs_small_buf_release(req);
682 rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base;
ec2e4523
PS		 683 /*
684 * No tcon so can't do
685 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
686 */
7e682f76
SF		 687 if (rc == -EOPNOTSUPP) {
688 cifs_dbg(VFS, "Dialect not supported by server. Consider "
9764c02f 689 "specifying vers=1.0 or vers=2.0 on mount for accessing"
7e682f76
SF		 690 " older servers\n");
691 goto neg_exit;
692 } else if (rc != 0)
ec2e4523
PS		 693 goto neg_exit;
694
9764c02f
SF		 695 if (strcmp(ses->server->vals->version_string,
696 SMB3ANY_VERSION_STRING) == 0) {
697 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
698 cifs_dbg(VFS,
699 "SMB2 dialect returned but not requested\n");
700 return -EIO;
701 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
702 cifs_dbg(VFS,
703 "SMB2.1 dialect returned but not requested\n");
704 return -EIO;
705 }
706 } else if (strcmp(ses->server->vals->version_string,
707 SMBDEFAULT_VERSION_STRING) == 0) {
708 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
709 cifs_dbg(VFS,
710 "SMB2 dialect returned but not requested\n");
711 return -EIO;
712 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
713 /* ops set to 3.0 by default for default so update */
714 ses->server->ops = &smb21_operations;
715 }
590d08d3
SF		 716 } else if (le16_to_cpu(rsp->DialectRevision) !=
717 ses->server->vals->protocol_id) {
9764c02f
SF		 718 /* if requested single dialect ensure returned dialect matched */
719 cifs_dbg(VFS, "Illegal 0x%x dialect returned: not requested\n",
590d08d3 720 le16_to_cpu(rsp->DialectRevision));
9764c02f
SF		 721 return -EIO;
722 }
723
f96637be 724 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
ec2e4523 725
e4aa25e7 726 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
f96637be 727 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
e4aa25e7 728 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
f96637be 729 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
e4aa25e7 730 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
f96637be 731 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
20b6d8b4
SF		 732 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
733 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
5f7fbf73
SF		 734 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
735 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
ec2e4523 736 else {
f799d623 737 cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
f96637be 738 le16_to_cpu(rsp->DialectRevision));
ec2e4523
PS		 739 rc = -EIO;
740 goto neg_exit;
741 }
742 server->dialect = le16_to_cpu(rsp->DialectRevision);
743
8bd68c6e
AA		 744 /*
745 * Keep a copy of the hash after negprot. This hash will be
746 * the starting hash value for all sessions made from this
747 * server.
748 */
749 memcpy(server->preauth_sha_hash, ses->preauth_sha_hash,
750 SMB2_PREAUTH_HASH_SIZE);
0fdfef9a 751
e598d1d8
JL		 752 /* SMB2 only has an extended negflavor */
753 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
2365c4ea
PS		 754 /* set it to the maximum buffer size value we can send with 1 credit */
755 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
756 SMB2_MAX_BUFFER_SIZE);
ec2e4523
PS		 757 server->max_read = le32_to_cpu(rsp->MaxReadSize);
758 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
ec2e4523 759 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
07108d0e
SF		 760 if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode)
761 cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n",
762 server->sec_mode);
ec2e4523 763 server->capabilities = le32_to_cpu(rsp->Capabilities);
29e20f9c
PS		 764 /* Internal types */
765 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
ec2e4523
PS		 766
767 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
49f466bd 768 (struct smb2_sync_hdr *)rsp);
5d875cc9
SF		 769 /*
770 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
771 * for us will be
772 * ses->sectype = RawNTLMSSP;
773 * but for time being this is our only auth choice so doesn't matter.
774 * We just found a server which sets blob length to zero expecting raw.
775 */
67dbea2c 776 if (blob_length == 0) {
5d875cc9 777 cifs_dbg(FYI, "missing security blob on negprot\n");
67dbea2c
PS		 778 server->sec_ntlmssp = true;
779 }
3c1bf7e4 780
38d77c50 781 rc = cifs_enable_signing(server, ses->sign);
9ddec561
JL		 782 if (rc)
783 goto neg_exit;
ceb1b0b9 784 if (blob_length) {
ebdd207e 785 rc = decode_negTokenInit(security_blob, blob_length, server);
ceb1b0b9
SF		 786 if (rc == 1)
787 rc = 0;
788 else if (rc == 0)
789 rc = -EIO;
ec2e4523 790 }
5100d8a3 791
5100d8a3
SF		 792 if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
793 if (rsp->NegotiateContextCount)
977b6170
RS		 794 rc = smb311_decode_neg_context(rsp, server,
795 rsp_iov.iov_len);
5100d8a3
SF		 796 else
797 cifs_dbg(VFS, "Missing expected negotiate contexts\n");
798 }
ec2e4523
PS		 799neg_exit:
800 free_rsp_buf(resp_buftype, rsp);
801 return rc;
802}
5478f9ba 803
ff1c038a
SF		 804int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
805{
2796d303
LL		 806 int rc;
807 struct validate_negotiate_info_req *pneg_inbuf;
fe83bebc 808 struct validate_negotiate_info_rsp *pneg_rsp = NULL;
ff1c038a 809 u32 rsplen;
9764c02f 810 u32 inbuflen; /* max of 4 dialects */
ff1c038a
SF		 811
812 cifs_dbg(FYI, "validate negotiate\n");
813
8bd68c6e
AA		 814 /* In SMB3.11 preauth integrity supersedes validate negotiate */
815 if (tcon->ses->server->dialect == SMB311_PROT_ID)
816 return 0;
817
ff1c038a
SF		 818 /*
819 * validation ioctl must be signed, so no point sending this if we
0603c96f
SF		 820 * can not sign it (ie are not known user). Even if signing is not
821 * required (enabled but not negotiated), in those cases we selectively
ff1c038a 822 * sign just this, the first and only signed request on a connection.
0603c96f 823 * Having validation of negotiate info helps reduce attack vectors.
ff1c038a 824 */
0603c96f 825 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
ff1c038a
SF		 826 return 0; /* validation requires signing */
827
0603c96f
SF		 828 if (tcon->ses->user_name == NULL) {
829 cifs_dbg(FYI, "Can't validate negotiate: null user mount\n");
830 return 0; /* validation requires signing */
831 }
832
833 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
834 cifs_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n");
835
2796d303
LL		 836 pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS);
837 if (!pneg_inbuf)
838 return -ENOMEM;
839
840 pneg_inbuf->Capabilities =
ff1c038a 841 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
2796d303 842 memcpy(pneg_inbuf->Guid, tcon->ses->server->client_guid,
39552ea8 843 SMB2_CLIENT_GUID_SIZE);
ff1c038a
SF		 844
845 if (tcon->ses->sign)
2796d303 846 pneg_inbuf->SecurityMode =
ff1c038a
SF		 847 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
848 else if (global_secflags & CIFSSEC_MAY_SIGN)
2796d303 849 pneg_inbuf->SecurityMode =
ff1c038a
SF		 850 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
851 else
2796d303 852 pneg_inbuf->SecurityMode = 0;
ff1c038a 853
9764c02f
SF		 854
855 if (strcmp(tcon->ses->server->vals->version_string,
856 SMB3ANY_VERSION_STRING) == 0) {
2796d303
LL		 857 pneg_inbuf->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
858 pneg_inbuf->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
859 pneg_inbuf->DialectCount = cpu_to_le16(2);
9764c02f 860 /* structure is big enough for 3 dialects, sending only 2 */
2796d303
LL		 861 inbuflen = sizeof(*pneg_inbuf) -
862 sizeof(pneg_inbuf->Dialects[0]);
9764c02f
SF		 863 } else if (strcmp(tcon->ses->server->vals->version_string,
864 SMBDEFAULT_VERSION_STRING) == 0) {
2796d303
LL		 865 pneg_inbuf->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
866 pneg_inbuf->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
867 pneg_inbuf->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
868 pneg_inbuf->DialectCount = cpu_to_le16(3);
9764c02f 869 /* structure is big enough for 3 dialects */
2796d303 870 inbuflen = sizeof(*pneg_inbuf);
9764c02f
SF		 871 } else {
872 /* otherwise specific dialect was requested */
2796d303 873 pneg_inbuf->Dialects[0] =
9764c02f 874 cpu_to_le16(tcon->ses->server->vals->protocol_id);
2796d303 875 pneg_inbuf->DialectCount = cpu_to_le16(1);
9764c02f 876 /* structure is big enough for 3 dialects, sending only 1 */
2796d303
LL		 877 inbuflen = sizeof(*pneg_inbuf) -
878 sizeof(pneg_inbuf->Dialects[0]) * 2;
9764c02f 879 }
ff1c038a
SF		 880
881 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
882 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
2796d303 883 (char *)pneg_inbuf, inbuflen, (char **)&pneg_rsp, &rsplen);
ff1c038a
SF		 884
885 if (rc != 0) {
886 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
2796d303
LL		 887 rc = -EIO;
888 goto out_free_inbuf;
ff1c038a
SF		 889 }
890
2796d303
LL		 891 rc = -EIO;
892 if (rsplen != sizeof(*pneg_rsp)) {
7db0a6ef
SF		 893 cifs_dbg(VFS, "invalid protocol negotiate response size: %d\n",
894 rsplen);
895
896 /* relax check since Mac returns max bufsize allowed on ioctl */
2796d303
LL		 897 if (rsplen > CIFSMaxBufSize || rsplen < sizeof(*pneg_rsp))
898 goto out_free_rsp;
ff1c038a
SF		 899 }
900
901 /* check validate negotiate info response matches what we got earlier */
9aca7e45 902 if (pneg_rsp->Dialect != cpu_to_le16(tcon->ses->server->dialect))
ff1c038a
SF		 903 goto vneg_out;
904
905 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
906 goto vneg_out;
907
908 /* do not validate server guid because not saved at negprot time yet */
909
910 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
911 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
912 goto vneg_out;
913
914 /* validate negotiate successful */
2796d303 915 rc = 0;
ff1c038a 916 cifs_dbg(FYI, "validate negotiate info successful\n");
2796d303 917 goto out_free_rsp;
ff1c038a
SF		 918
919vneg_out:
920 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
2796d303 921out_free_rsp:
fe83bebc 922 kfree(pneg_rsp);
2796d303
LL		 923out_free_inbuf:
924 kfree(pneg_inbuf);
925 return rc;
ff1c038a
SF		 926}
927
ef65aaed
SP		 928enum securityEnum
929smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
930{
931 switch (requested) {
932 case Kerberos:
933 case RawNTLMSSP:
934 return requested;
935 case NTLMv2:
936 return RawNTLMSSP;
937 case Unspecified:
938 if (server->sec_ntlmssp &&
939 (global_secflags & CIFSSEC_MAY_NTLMSSP))
940 return RawNTLMSSP;
941 if ((server->sec_kerberos || server->sec_mskerberos) &&
942 (global_secflags & CIFSSEC_MAY_KRB5))
943 return Kerberos;
944 /* Fallthrough */
945 default:
946 return Unspecified;
947 }
948}
949
3baf1a7b
SP		 950struct SMB2_sess_data {
951 unsigned int xid;
952 struct cifs_ses *ses;
953 struct nls_table *nls_cp;
954 void (*func)(struct SMB2_sess_data *);
955 int result;
956 u64 previous_session;
957
958 /* we will send the SMB in three pieces:
959 * a fixed length beginning part, an optional
960 * SPNEGO blob (which can be zero length), and a
961 * last part which will include the strings
962 * and rest of bcc area. This allows us to avoid
963 * a large buffer 17K allocation
964 */
965 int buf0_type;
966 struct kvec iov[2];
967};
968
969static int
970SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
971{
972 int rc;
973 struct cifs_ses *ses = sess_data->ses;
974 struct smb2_sess_setup_req *req;
975 struct TCP_Server_Info *server = ses->server;
88ea5cb7 976 unsigned int total_len;
3baf1a7b 977
88ea5cb7
RS		 978 rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, (void **) &req,
979 &total_len);
3baf1a7b
SP		 980 if (rc)
981 return rc;
982
31473fc4 983 /* First session, not a reauthenticate */
88ea5cb7 984 req->sync_hdr.SessionId = 0;
3baf1a7b
SP		 985
986 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
987 req->PreviousSessionId = sess_data->previous_session;
988
989 req->Flags = 0; /* MBZ */
d409014e
SF		 990
991 /* enough to enable echos and oplocks and one max size write */
992 req->sync_hdr.CreditRequest = cpu_to_le16(130);
3baf1a7b
SP		 993
994 /* only one of SMB2 signing flags may be set in SMB2 request */
995 if (server->sign)
996 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
997 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
998 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
999 else
1000 req->SecurityMode = 0;
1001
1002 req->Capabilities = 0;
1003 req->Channel = 0; /* MBZ */
1004
1005 sess_data->iov[0].iov_base = (char *)req;
88ea5cb7
RS		 1006 /* 1 for pad */
1007 sess_data->iov[0].iov_len = total_len - 1;
3baf1a7b
SP		 1008 /*
1009 * This variable will be used to clear the buffer
1010 * allocated above in case of any error in the calling function.
1011 */
1012 sess_data->buf0_type = CIFS_SMALL_BUFFER;
1013
1014 return 0;
1015}
1016
1017static void
1018SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
1019{
1020 free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
1021 sess_data->buf0_type = CIFS_NO_BUFFER;
1022}
1023
1024static int
1025SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
1026{
1027 int rc;
40eff45b 1028 struct smb_rqst rqst;
3baf1a7b 1029 struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
da502f7d 1030 struct kvec rsp_iov = { NULL, 0 };
3baf1a7b
SP		 1031
1032 /* Testing shows that buffer offset must be at location of Buffer[0] */
1033 req->SecurityBufferOffset =
88ea5cb7 1034 cpu_to_le16(sizeof(struct smb2_sess_setup_req) - 1 /* pad */);
3baf1a7b
SP		 1035 req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
1036
40eff45b
RS		 1037 memset(&rqst, 0, sizeof(struct smb_rqst));
1038 rqst.rq_iov = sess_data->iov;
1039 rqst.rq_nvec = 2;
3baf1a7b 1040
40eff45b
RS		 1041 /* BB add code to build os and lm fields */
1042 rc = cifs_send_recv(sess_data->xid, sess_data->ses,
1043 &rqst,
88ea5cb7
RS		 1044 &sess_data->buf0_type,
1045 CIFS_LOG_ERROR | CIFS_NEG_OP, &rsp_iov);
da502f7d
PS		 1046 cifs_small_buf_release(sess_data->iov[0].iov_base);
1047 memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
3baf1a7b
SP		 1048
1049 return rc;
1050}
1051
1052static int
1053SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
1054{
1055 int rc = 0;
1056 struct cifs_ses *ses = sess_data->ses;
1057
1058 mutex_lock(&ses->server->srv_mutex);
cabfb368 1059 if (ses->server->ops->generate_signingkey) {
3baf1a7b 1060 rc = ses->server->ops->generate_signingkey(ses);
3baf1a7b
SP		 1061 if (rc) {
1062 cifs_dbg(FYI,
1063 "SMB3 session key generation failed\n");
1064 mutex_unlock(&ses->server->srv_mutex);
cabfb368 1065 return rc;
3baf1a7b
SP		 1066 }
1067 }
1068 if (!ses->server->session_estab) {
1069 ses->server->sequence_number = 0x2;
1070 ses->server->session_estab = true;
1071 }
1072 mutex_unlock(&ses->server->srv_mutex);
1073
1074 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
1075 spin_lock(&GlobalMid_Lock);
1076 ses->status = CifsGood;
1077 ses->need_reconnect = false;
1078 spin_unlock(&GlobalMid_Lock);
3baf1a7b
SP		 1079 return rc;
1080}
1081
1082#ifdef CONFIG_CIFS_UPCALL
1083static void
1084SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1085{
1086 int rc;
1087 struct cifs_ses *ses = sess_data->ses;
1088 struct cifs_spnego_msg *msg;
1089 struct key *spnego_key = NULL;
1090 struct smb2_sess_setup_rsp *rsp = NULL;
1091
1092 rc = SMB2_sess_alloc_buffer(sess_data);
1093 if (rc)
1094 goto out;
1095
1096 spnego_key = cifs_get_spnego_key(ses);
1097 if (IS_ERR(spnego_key)) {
1098 rc = PTR_ERR(spnego_key);
1099 spnego_key = NULL;
1100 goto out;
1101 }
1102
1103 msg = spnego_key->payload.data[0];
1104 /*
1105 * check version field to make sure that cifs.upcall is
1106 * sending us a response in an expected form
1107 */
1108 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
1109 cifs_dbg(VFS,
1110 "bad cifs.upcall version. Expected %d got %d",
1111 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
1112 rc = -EKEYREJECTED;
1113 goto out_put_spnego_key;
1114 }
1115
1116 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
1117 GFP_KERNEL);
1118 if (!ses->auth_key.response) {
1119 cifs_dbg(VFS,
1120 "Kerberos can't allocate (%u bytes) memory",
1121 msg->sesskey_len);
1122 rc = -ENOMEM;
1123 goto out_put_spnego_key;
1124 }
1125 ses->auth_key.len = msg->sesskey_len;
1126
1127 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
1128 sess_data->iov[1].iov_len = msg->secblob_len;
1129
1130 rc = SMB2_sess_sendreceive(sess_data);
1131 if (rc)
1132 goto out_put_spnego_key;
1133
1134 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
49f466bd 1135 ses->Suid = rsp->sync_hdr.SessionId;
3baf1a7b
SP		 1136
1137 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
3baf1a7b
SP		 1138
1139 rc = SMB2_sess_establish_session(sess_data);
1140out_put_spnego_key:
1141 key_invalidate(spnego_key);
1142 key_put(spnego_key);
1143out:
1144 sess_data->result = rc;
1145 sess_data->func = NULL;
1146 SMB2_sess_free_buffer(sess_data);
1147}
1148#else
1149static void
1150SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1151{
1152 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
1153 sess_data->result = -EOPNOTSUPP;
1154 sess_data->func = NULL;
1155}
1156#endif
1157
166cea4d
SP		 1158static void
1159SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
1160
1161static void
1162SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
5478f9ba 1163{
166cea4d
SP		 1164 int rc;
1165 struct cifs_ses *ses = sess_data->ses;
5478f9ba 1166 struct smb2_sess_setup_rsp *rsp = NULL;
166cea4d 1167 char *ntlmssp_blob = NULL;
5478f9ba 1168 bool use_spnego = false; /* else use raw ntlmssp */
166cea4d 1169 u16 blob_length = 0;
d4e63bd6 1170
5478f9ba
PS		 1171 /*
1172 * If memory allocation is successful, caller of this function
1173 * frees it.
1174 */
1175 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
166cea4d
SP		 1176 if (!ses->ntlmssp) {
1177 rc = -ENOMEM;
1178 goto out_err;
1179 }
5c234aa5 1180 ses->ntlmssp->sesskey_per_smbsess = true;
5478f9ba 1181
166cea4d 1182 rc = SMB2_sess_alloc_buffer(sess_data);
5478f9ba 1183 if (rc)
166cea4d 1184 goto out_err;
5478f9ba 1185
166cea4d
SP		 1186 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
1187 GFP_KERNEL);
1188 if (ntlmssp_blob == NULL) {
1189 rc = -ENOMEM;
1190 goto out;
1191 }
c2afb814 1192
166cea4d
SP		 1193 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
1194 if (use_spnego) {
1195 /* BB eventually need to add this */
1196 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1197 rc = -EOPNOTSUPP;
1198 goto out;
1199 } else {
1200 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
1201 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
1202 }
1203 sess_data->iov[1].iov_base = ntlmssp_blob;
1204 sess_data->iov[1].iov_len = blob_length;
c2afb814 1205
166cea4d
SP		 1206 rc = SMB2_sess_sendreceive(sess_data);
1207 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
5478f9ba 1208
166cea4d
SP		 1209 /* If true, rc here is expected and not an error */
1210 if (sess_data->buf0_type != CIFS_NO_BUFFER &&
49f466bd 1211 rsp->sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
166cea4d 1212 rc = 0;
38d77c50 1213
166cea4d
SP		 1214 if (rc)
1215 goto out;
5478f9ba 1216
1fc6ad2f 1217 if (offsetof(struct smb2_sess_setup_rsp, Buffer) !=
166cea4d
SP		 1218 le16_to_cpu(rsp->SecurityBufferOffset)) {
1219 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
1220 le16_to_cpu(rsp->SecurityBufferOffset));
5478f9ba 1221 rc = -EIO;
166cea4d 1222 goto out;
5478f9ba 1223 }
166cea4d
SP		 1224 rc = decode_ntlmssp_challenge(rsp->Buffer,
1225 le16_to_cpu(rsp->SecurityBufferLength), ses);
1226 if (rc)
1227 goto out;
5478f9ba 1228
166cea4d 1229 cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
5478f9ba 1230
5478f9ba 1231
49f466bd 1232 ses->Suid = rsp->sync_hdr.SessionId;
166cea4d 1233 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
166cea4d
SP		 1234
1235out:
1236 kfree(ntlmssp_blob);
1237 SMB2_sess_free_buffer(sess_data);
1238 if (!rc) {
1239 sess_data->result = 0;
1240 sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
1241 return;
1242 }
1243out_err:
1244 kfree(ses->ntlmssp);
1245 ses->ntlmssp = NULL;
1246 sess_data->result = rc;
1247 sess_data->func = NULL;
1248}
5478f9ba 1249
166cea4d
SP		 1250static void
1251SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
1252{
1253 int rc;
1254 struct cifs_ses *ses = sess_data->ses;
1255 struct smb2_sess_setup_req *req;
1256 struct smb2_sess_setup_rsp *rsp = NULL;
1257 unsigned char *ntlmssp_blob = NULL;
1258 bool use_spnego = false; /* else use raw ntlmssp */
1259 u16 blob_length = 0;
5478f9ba 1260
166cea4d
SP		 1261 rc = SMB2_sess_alloc_buffer(sess_data);
1262 if (rc)
1263 goto out;
5478f9ba 1264
166cea4d 1265 req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
88ea5cb7 1266 req->sync_hdr.SessionId = ses->Suid;
166cea4d
SP		 1267
1268 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
1269 sess_data->nls_cp);
1270 if (rc) {
1271 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
1272 goto out;
5478f9ba
PS		 1273 }
1274
166cea4d
SP		 1275 if (use_spnego) {
1276 /* BB eventually need to add this */
1277 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1278 rc = -EOPNOTSUPP;
1279 goto out;
1280 }
1281 sess_data->iov[1].iov_base = ntlmssp_blob;
1282 sess_data->iov[1].iov_len = blob_length;
5478f9ba 1283
166cea4d
SP		 1284 rc = SMB2_sess_sendreceive(sess_data);
1285 if (rc)
1286 goto out;
1287
1288 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1289
49f466bd 1290 ses->Suid = rsp->sync_hdr.SessionId;
5478f9ba 1291 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
5478f9ba 1292
166cea4d
SP		 1293 rc = SMB2_sess_establish_session(sess_data);
1294out:
1295 kfree(ntlmssp_blob);
1296 SMB2_sess_free_buffer(sess_data);
1297 kfree(ses->ntlmssp);
1298 ses->ntlmssp = NULL;
1299 sess_data->result = rc;
1300 sess_data->func = NULL;
1301}
d4e63bd6 1302
166cea4d
SP		 1303static int
1304SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data)
1305{
ef65aaed
SP		 1306 int type;
1307
1308 type = smb2_select_sectype(ses->server, ses->sectype);
1309 cifs_dbg(FYI, "sess setup type %d\n", type);
1310 if (type == Unspecified) {
1311 cifs_dbg(VFS,
1312 "Unable to select appropriate authentication method!");
1313 return -EINVAL;
1314 }
d4e63bd6 1315
ef65aaed 1316 switch (type) {
166cea4d
SP		 1317 case Kerberos:
1318 sess_data->func = SMB2_auth_kerberos;
1319 break;
1320 case RawNTLMSSP:
1321 sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
1322 break;
1323 default:
ef65aaed 1324 cifs_dbg(VFS, "secType %d not supported!\n", type);
166cea4d 1325 return -EOPNOTSUPP;
d4e63bd6
SP		 1326 }
1327
166cea4d
SP		 1328 return 0;
1329}
1330
1331int
1332SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
1333 const struct nls_table *nls_cp)
1334{
1335 int rc = 0;
1336 struct TCP_Server_Info *server = ses->server;
1337 struct SMB2_sess_data *sess_data;
1338
1339 cifs_dbg(FYI, "Session Setup\n");
1340
1341 if (!server) {
1342 WARN(1, "%s: server is NULL!\n", __func__);
1343 return -EIO;
d4e63bd6 1344 }
d4e63bd6 1345
166cea4d
SP		 1346 sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
1347 if (!sess_data)
1348 return -ENOMEM;
1349
1350 rc = SMB2_select_sec(ses, sess_data);
1351 if (rc)
1352 goto out;
1353 sess_data->xid = xid;
1354 sess_data->ses = ses;
1355 sess_data->buf0_type = CIFS_NO_BUFFER;
1356 sess_data->nls_cp = (struct nls_table *) nls_cp;
b2adf22f 1357 sess_data->previous_session = ses->Suid;
166cea4d 1358
8bd68c6e
AA		 1359 /*
1360 * Initialize the session hash with the server one.
1361 */
1362 memcpy(ses->preauth_sha_hash, ses->server->preauth_sha_hash,
1363 SMB2_PREAUTH_HASH_SIZE);
8bd68c6e 1364
166cea4d
SP		 1365 while (sess_data->func)
1366 sess_data->func(sess_data);
1367
c721c389
SF		 1368 if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign))
1369 cifs_dbg(VFS, "signing requested but authenticated as guest\n");
3baf1a7b 1370 rc = sess_data->result;
166cea4d 1371out:
3baf1a7b 1372 kfree(sess_data);
5478f9ba
PS		 1373 return rc;
1374}
1375
1376int
1377SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
1378{
40eff45b 1379 struct smb_rqst rqst;
5478f9ba
PS		 1380 struct smb2_logoff_req *req; /* response is also trivial struct */
1381 int rc = 0;
1382 struct TCP_Server_Info *server;
7fb8986e 1383 int flags = 0;
45305eda
RS		 1384 unsigned int total_len;
1385 struct kvec iov[1];
1386 struct kvec rsp_iov;
1387 int resp_buf_type;
5478f9ba 1388
f96637be 1389 cifs_dbg(FYI, "disconnect session %p\n", ses);
5478f9ba
PS		 1390
1391 if (ses && (ses->server))
1392 server = ses->server;
1393 else
1394 return -EIO;
1395
eb4c7df6
SP		 1396 /* no need to send SMB logoff if uid already closed due to reconnect */
1397 if (ses->need_reconnect)
1398 goto smb2_session_already_dead;
1399
45305eda 1400 rc = smb2_plain_req_init(SMB2_LOGOFF, NULL, (void **) &req, &total_len);
5478f9ba
PS		 1401 if (rc)
1402 return rc;
1403
1404 /* since no tcon, smb2_init can not do this, so do here */
45305eda 1405 req->sync_hdr.SessionId = ses->Suid;
7fb8986e
PS		 1406
1407 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
1408 flags |= CIFS_TRANSFORM_REQ;
1409 else if (server->sign)
45305eda
RS		 1410 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1411
1412 flags |= CIFS_NO_RESP;
1413
1414 iov[0].iov_base = (char *)req;
1415 iov[0].iov_len = total_len;
5478f9ba 1416
40eff45b
RS		 1417 memset(&rqst, 0, sizeof(struct smb_rqst));
1418 rqst.rq_iov = iov;
1419 rqst.rq_nvec = 1;
1420
1421 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
da502f7d 1422 cifs_small_buf_release(req);
5478f9ba
PS		 1423 /*
1424 * No tcon so can't do
1425 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1426 */
eb4c7df6
SP		 1427
1428smb2_session_already_dead:
5478f9ba
PS		 1429 return rc;
1430}
faaf946a
PS		 1431
1432static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
1433{
d60622eb 1434 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
faaf946a
PS		 1435}
1436
1437#define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1438
de9f68df
SF		 1439/* These are similar values to what Windows uses */
1440static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
1441{
1442 tcon->max_chunks = 256;
1443 tcon->max_bytes_chunk = 1048576;
1444 tcon->max_bytes_copy = 16777216;
1445}
1446
faaf946a
PS		 1447int
1448SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
1449 struct cifs_tcon *tcon, const struct nls_table *cp)
1450{
40eff45b 1451 struct smb_rqst rqst;
faaf946a
PS		 1452 struct smb2_tree_connect_req *req;
1453 struct smb2_tree_connect_rsp *rsp = NULL;
1454 struct kvec iov[2];
db3b5474 1455 struct kvec rsp_iov = { NULL, 0 };
faaf946a
PS		 1456 int rc = 0;
1457 int resp_buftype;
1458 int unc_path_len;
faaf946a 1459 __le16 *unc_path = NULL;
7fb8986e 1460 int flags = 0;
661bb943 1461 unsigned int total_len;
faaf946a 1462
f96637be 1463 cifs_dbg(FYI, "TCON\n");
faaf946a 1464
68a6afa7 1465 if (!(ses->server) || !tree)
faaf946a
PS		 1466 return -EIO;
1467
faaf946a
PS		 1468 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
1469 if (unc_path == NULL)
1470 return -ENOMEM;
1471
1472 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
1473 unc_path_len *= 2;
1474 if (unc_path_len < 2) {
1475 kfree(unc_path);
1476 return -EINVAL;
1477 }
1478
806a28ef 1479 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
b327a717 1480 tcon->tid = 0;
806a28ef 1481
661bb943
RS		 1482 rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, (void **) &req,
1483 &total_len);
faaf946a
PS		 1484 if (rc) {
1485 kfree(unc_path);
1486 return rc;
1487 }
1488
5a77e75f 1489 if (smb3_encryption_required(tcon))
ae6f8dd4 1490 flags |= CIFS_TRANSFORM_REQ;
faaf946a
PS		 1491
1492 iov[0].iov_base = (char *)req;
661bb943
RS		 1493 /* 1 for pad */
1494 iov[0].iov_len = total_len - 1;
faaf946a
PS		 1495
1496 /* Testing shows that buffer offset must be at location of Buffer[0] */
1497 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
661bb943 1498 - 1 /* pad */);
faaf946a
PS		 1499 req->PathLength = cpu_to_le16(unc_path_len - 2);
1500 iov[1].iov_base = unc_path;
1501 iov[1].iov_len = unc_path_len;
1502
6188f28b
SF		 1503 /* 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 */
1504 if ((ses->server->dialect == SMB311_PROT_ID) &&
5a77e75f 1505 !smb3_encryption_required(tcon))
6188f28b
SF		 1506 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1507
40eff45b
RS		 1508 memset(&rqst, 0, sizeof(struct smb_rqst));
1509 rqst.rq_iov = iov;
1510 rqst.rq_nvec = 2;
1511
1512 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1513 cifs_small_buf_release(req);
1514 rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
faaf946a
PS		 1515
1516 if (rc != 0) {
1517 if (tcon) {
1518 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
1519 tcon->need_reconnect = true;
1520 }
1521 goto tcon_error_exit;
1522 }
1523
cd123007
CJ		 1524 switch (rsp->ShareType) {
1525 case SMB2_SHARE_TYPE_DISK:
f96637be 1526 cifs_dbg(FYI, "connection to disk share\n");
cd123007
CJ		 1527 break;
1528 case SMB2_SHARE_TYPE_PIPE:
b327a717 1529 tcon->pipe = true;
f96637be 1530 cifs_dbg(FYI, "connection to pipe share\n");
cd123007
CJ		 1531 break;
1532 case SMB2_SHARE_TYPE_PRINT:
b327a717 1533 tcon->print = true;
f96637be 1534 cifs_dbg(FYI, "connection to printer\n");
cd123007
CJ		 1535 break;
1536 default:
f96637be 1537 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
faaf946a
PS		 1538 rc = -EOPNOTSUPP;
1539 goto tcon_error_exit;
1540 }
1541
1542 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
769ee6a4 1543 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
faaf946a
PS		 1544 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1545 tcon->tidStatus = CifsGood;
1546 tcon->need_reconnect = false;
49f466bd 1547 tcon->tid = rsp->sync_hdr.TreeId;
46b51d08 1548 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
faaf946a
PS		 1549
1550 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1551 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
f96637be 1552 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
ae6f8dd4
PS		 1553
1554 if (tcon->seal &&
1555 !(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
1556 cifs_dbg(VFS, "Encryption is requested but not supported\n");
1557
de9f68df 1558 init_copy_chunk_defaults(tcon);
ff1c038a
SF		 1559 if (tcon->ses->server->ops->validate_negotiate)
1560 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
faaf946a
PS		 1561tcon_exit:
1562 free_rsp_buf(resp_buftype, rsp);
1563 kfree(unc_path);
1564 return rc;
1565
1566tcon_error_exit:
49f466bd 1567 if (rsp && rsp->sync_hdr.Status == STATUS_BAD_NETWORK_NAME) {
f96637be 1568 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
faaf946a
PS		 1569 }
1570 goto tcon_exit;
1571}
1572
1573int
1574SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1575{
40eff45b 1576 struct smb_rqst rqst;
faaf946a
PS		 1577 struct smb2_tree_disconnect_req *req; /* response is trivial */
1578 int rc = 0;
faaf946a 1579 struct cifs_ses *ses = tcon->ses;
7fb8986e 1580 int flags = 0;
4eecf4cf
RS		 1581 unsigned int total_len;
1582 struct kvec iov[1];
1583 struct kvec rsp_iov;
1584 int resp_buf_type;
faaf946a 1585
f96637be 1586 cifs_dbg(FYI, "Tree Disconnect\n");
faaf946a 1587
68a6afa7 1588 if (!ses || !(ses->server))
faaf946a
PS		 1589 return -EIO;
1590
1591 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1592 return 0;
1593
4eecf4cf
RS		 1594 rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req,
1595 &total_len);
faaf946a
PS		 1596 if (rc)
1597 return rc;
1598
5a77e75f 1599 if (smb3_encryption_required(tcon))
7fb8986e
PS		 1600 flags |= CIFS_TRANSFORM_REQ;
1601
4eecf4cf
RS		 1602 flags |= CIFS_NO_RESP;
1603
1604 iov[0].iov_base = (char *)req;
1605 iov[0].iov_len = total_len;
1606
40eff45b
RS		 1607 memset(&rqst, 0, sizeof(struct smb_rqst));
1608 rqst.rq_iov = iov;
1609 rqst.rq_nvec = 1;
1610
1611 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
da502f7d 1612 cifs_small_buf_release(req);
faaf946a
PS		 1613 if (rc)
1614 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1615
1616 return rc;
1617}
2503a0db 1618
b8c32dbb 1619
63eb3def
PS		 1620static struct create_durable *
1621create_durable_buf(void)
1622{
1623 struct create_durable *buf;
1624
1625 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1626 if (!buf)
1627 return NULL;
1628
1629 buf->ccontext.DataOffset = cpu_to_le16(offsetof
9cbc0b73 1630 (struct create_durable, Data));
63eb3def
PS		 1631 buf->ccontext.DataLength = cpu_to_le32(16);
1632 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1633 (struct create_durable, Name));
1634 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 1635 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
63eb3def
PS		 1636 buf->Name[0] = 'D';
1637 buf->Name[1] = 'H';
1638 buf->Name[2] = 'n';
1639 buf->Name[3] = 'Q';
1640 return buf;
1641}
1642
9cbc0b73
PS		 1643static struct create_durable *
1644create_reconnect_durable_buf(struct cifs_fid *fid)
1645{
1646 struct create_durable *buf;
1647
1648 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1649 if (!buf)
1650 return NULL;
1651
1652 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1653 (struct create_durable, Data));
1654 buf->ccontext.DataLength = cpu_to_le32(16);
1655 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1656 (struct create_durable, Name));
1657 buf->ccontext.NameLength = cpu_to_le16(4);
1658 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1659 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
12197a7f 1660 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
9cbc0b73
PS		 1661 buf->Name[0] = 'D';
1662 buf->Name[1] = 'H';
1663 buf->Name[2] = 'n';
1664 buf->Name[3] = 'C';
1665 return buf;
1666}
1667
b8c32dbb 1668static __u8
42873b0a 1669parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
96164ab2 1670 unsigned int *epoch, char *lease_key)
b8c32dbb
PS		 1671{
1672 char *data_offset;
b5c7cde3 1673 struct create_context *cc;
deb7deff
JM		 1674 unsigned int next;
1675 unsigned int remaining;
fd554396 1676 char *name;
b8c32dbb 1677
1fc6ad2f 1678 data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset);
deb7deff 1679 remaining = le32_to_cpu(rsp->CreateContextsLength);
b5c7cde3 1680 cc = (struct create_context *)data_offset;
deb7deff 1681 while (remaining >= sizeof(struct create_context)) {
b5c7cde3 1682 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
deb7deff
JM		 1683 if (le16_to_cpu(cc->NameLength) == 4 &&
1684 strncmp(name, "RqLs", 4) == 0)
96164ab2
RS		 1685 return server->ops->parse_lease_buf(cc, epoch,
1686 lease_key);
deb7deff
JM		 1687
1688 next = le32_to_cpu(cc->Next);
1689 if (!next)
1690 break;
1691 remaining -= next;
1692 cc = (struct create_context *)((char *)cc + next);
1693 }
b8c32dbb 1694
b5c7cde3 1695 return 0;
b8c32dbb
PS		 1696}
1697
d22cbfec 1698static int
a41a28bd 1699add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
729c0c9d 1700 unsigned int *num_iovec, u8 *lease_key, __u8 *oplock)
d22cbfec
PS		 1701{
1702 struct smb2_create_req *req = iov[0].iov_base;
1703 unsigned int num = *num_iovec;
1704
729c0c9d 1705 iov[num].iov_base = server->ops->create_lease_buf(lease_key, *oplock);
d22cbfec
PS		 1706 if (iov[num].iov_base == NULL)
1707 return -ENOMEM;
a41a28bd 1708 iov[num].iov_len = server->vals->create_lease_size;
d22cbfec
PS		 1709 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1710 if (!req->CreateContextsOffset)
1711 req->CreateContextsOffset = cpu_to_le32(
4f33bc35 1712 sizeof(struct smb2_create_req) +
d22cbfec 1713 iov[num - 1].iov_len);
a41a28bd
PS		 1714 le32_add_cpu(&req->CreateContextsLength,
1715 server->vals->create_lease_size);
d22cbfec
PS		 1716 *num_iovec = num + 1;
1717 return 0;
1718}
1719
b56eae4d
SF		 1720static struct create_durable_v2 *
1721create_durable_v2_buf(struct cifs_fid *pfid)
1722{
1723 struct create_durable_v2 *buf;
1724
1725 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
1726 if (!buf)
1727 return NULL;
1728
1729 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1730 (struct create_durable_v2, dcontext));
1731 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
1732 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1733 (struct create_durable_v2, Name));
1734 buf->ccontext.NameLength = cpu_to_le16(4);
1735
1736 buf->dcontext.Timeout = 0; /* Should this be configurable by workload */
1737 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
fa70b87c 1738 generate_random_uuid(buf->dcontext.CreateGuid);
b56eae4d
SF		 1739 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
1740
1741 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1742 buf->Name[0] = 'D';
1743 buf->Name[1] = 'H';
1744 buf->Name[2] = '2';
1745 buf->Name[3] = 'Q';
1746 return buf;
1747}
1748
1749static struct create_durable_handle_reconnect_v2 *
1750create_reconnect_durable_v2_buf(struct cifs_fid *fid)
1751{
1752 struct create_durable_handle_reconnect_v2 *buf;
1753
1754 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
1755 GFP_KERNEL);
1756 if (!buf)
1757 return NULL;
1758
1759 buf->ccontext.DataOffset =
1760 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1761 dcontext));
1762 buf->ccontext.DataLength =
1763 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
1764 buf->ccontext.NameOffset =
1765 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1766 Name));
1767 buf->ccontext.NameLength = cpu_to_le16(4);
1768
1769 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
1770 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
1771 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1772 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
1773
1774 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1775 buf->Name[0] = 'D';
1776 buf->Name[1] = 'H';
1777 buf->Name[2] = '2';
1778 buf->Name[3] = 'C';
1779 return buf;
1780}
1781
63eb3def 1782static int
b56eae4d
SF		 1783add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
1784 struct cifs_open_parms *oparms)
1785{
1786 struct smb2_create_req *req = iov[0].iov_base;
1787 unsigned int num = *num_iovec;
1788
1789 iov[num].iov_base = create_durable_v2_buf(oparms->fid);
1790 if (iov[num].iov_base == NULL)
1791 return -ENOMEM;
1792 iov[num].iov_len = sizeof(struct create_durable_v2);
1793 if (!req->CreateContextsOffset)
1794 req->CreateContextsOffset =
4f33bc35 1795 cpu_to_le32(sizeof(struct smb2_create_req) +
b56eae4d
SF		 1796 iov[1].iov_len);
1797 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
b56eae4d
SF		 1798 *num_iovec = num + 1;
1799 return 0;
1800}
1801
1802static int
1803add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
9cbc0b73 1804 struct cifs_open_parms *oparms)
63eb3def
PS		 1805{
1806 struct smb2_create_req *req = iov[0].iov_base;
1807 unsigned int num = *num_iovec;
1808
b56eae4d
SF		 1809 /* indicate that we don't need to relock the file */
1810 oparms->reconnect = false;
1811
1812 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
1813 if (iov[num].iov_base == NULL)
1814 return -ENOMEM;
1815 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
1816 if (!req->CreateContextsOffset)
1817 req->CreateContextsOffset =
4f33bc35 1818 cpu_to_le32(sizeof(struct smb2_create_req) +
b56eae4d
SF		 1819 iov[1].iov_len);
1820 le32_add_cpu(&req->CreateContextsLength,
1821 sizeof(struct create_durable_handle_reconnect_v2));
b56eae4d
SF		 1822 *num_iovec = num + 1;
1823 return 0;
1824}
1825
1826static int
1827add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1828 struct cifs_open_parms *oparms, bool use_persistent)
1829{
1830 struct smb2_create_req *req = iov[0].iov_base;
1831 unsigned int num = *num_iovec;
1832
1833 if (use_persistent) {
1834 if (oparms->reconnect)
1835 return add_durable_reconnect_v2_context(iov, num_iovec,
1836 oparms);
1837 else
1838 return add_durable_v2_context(iov, num_iovec, oparms);
1839 }
1840
9cbc0b73
PS		 1841 if (oparms->reconnect) {
1842 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1843 /* indicate that we don't need to relock the file */
1844 oparms->reconnect = false;
1845 } else
1846 iov[num].iov_base = create_durable_buf();
63eb3def
PS		 1847 if (iov[num].iov_base == NULL)
1848 return -ENOMEM;
1849 iov[num].iov_len = sizeof(struct create_durable);
1850 if (!req->CreateContextsOffset)
1851 req->CreateContextsOffset =
4f33bc35 1852 cpu_to_le32(sizeof(struct smb2_create_req) +
63eb3def 1853 iov[1].iov_len);
31f92e9a 1854 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
63eb3def
PS		 1855 *num_iovec = num + 1;
1856 return 0;
1857}
1858
f0712928
AA		 1859static int
1860alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
1861 const char *treename, const __le16 *path)
1862{
1863 int treename_len, path_len;
1864 struct nls_table *cp;
1865 const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
1866
1867 /*
1868 * skip leading "\\"
1869 */
1870 treename_len = strlen(treename);
1871 if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\'))
1872 return -EINVAL;
1873
1874 treename += 2;
1875 treename_len -= 2;
1876
1877 path_len = UniStrnlen((wchar_t *)path, PATH_MAX);
1878
1879 /*
1880 * make room for one path separator between the treename and
1881 * path
1882 */
1883 *out_len = treename_len + 1 + path_len;
1884
1885 /*
1886 * final path needs to be null-terminated UTF16 with a
1887 * size aligned to 8
1888 */
1889
1890 *out_size = roundup((*out_len+1)*2, 8);
1891 *out_path = kzalloc(*out_size, GFP_KERNEL);
1892 if (!*out_path)
1893 return -ENOMEM;
1894
1895 cp = load_nls_default();
1896 cifs_strtoUTF16(*out_path, treename, treename_len, cp);
1897 UniStrcat(*out_path, sep);
1898 UniStrcat(*out_path, path);
1899 unload_nls(cp);
1900
1901 return 0;
1902}
1903
bea851b8
SF		 1904int smb311_posix_mkdir(const unsigned int xid, struct inode *inode,
1905 umode_t mode, struct cifs_tcon *tcon,
1906 const char *full_path,
1907 struct cifs_sb_info *cifs_sb)
1908{
1909 struct smb_rqst rqst;
1910 struct smb2_create_req *req;
256b4c3f 1911 struct smb2_create_rsp *rsp = NULL;
bea851b8
SF		 1912 struct TCP_Server_Info *server;
1913 struct cifs_ses *ses = tcon->ses;
1914 struct kvec iov[3]; /* make sure at least one for each open context */
1915 struct kvec rsp_iov = {NULL, 0};
1916 int resp_buftype;
1917 int uni_path_len;
1918 __le16 *copy_path = NULL;
1919 int copy_size;
1920 int rc = 0;
1921 unsigned int n_iov = 2;
1922 __u32 file_attributes = 0;
1923 char *pc_buf = NULL;
1924 int flags = 0;
1925 unsigned int total_len;
256b4c3f 1926 __le16 *utf16_path = NULL;
bea851b8
SF		 1927
1928 cifs_dbg(FYI, "mkdir\n");
1929
256b4c3f
AA		 1930 /* resource #1: path allocation */
1931 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1932 if (!utf16_path)
1933 return -ENOMEM;
1934
bea851b8
SF		 1935 if (ses && (ses->server))
1936 server = ses->server;
256b4c3f
AA		 1937 else {
1938 rc = -EIO;
1939 goto err_free_path;
1940 }
bea851b8 1941
256b4c3f 1942 /* resource #2: request */
bea851b8 1943 rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
bea851b8 1944 if (rc)
256b4c3f
AA		 1945 goto err_free_path;
1946
bea851b8
SF		 1947
1948 if (smb3_encryption_required(tcon))
1949 flags |= CIFS_TRANSFORM_REQ;
1950
bea851b8
SF		 1951 req->ImpersonationLevel = IL_IMPERSONATION;
1952 req->DesiredAccess = cpu_to_le32(FILE_WRITE_ATTRIBUTES);
1953 /* File attributes ignored on open (used in create though) */
1954 req->FileAttributes = cpu_to_le32(file_attributes);
1955 req->ShareAccess = FILE_SHARE_ALL_LE;
1956 req->CreateDisposition = cpu_to_le32(FILE_CREATE);
1957 req->CreateOptions = cpu_to_le32(CREATE_NOT_FILE);
1958
1959 iov[0].iov_base = (char *)req;
1960 /* -1 since last byte is buf[0] which is sent below (path) */
1961 iov[0].iov_len = total_len - 1;
1962
1963 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
1964
1965 /* [MS-SMB2] 2.2.13 NameOffset:
1966 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
1967 * the SMB2 header, the file name includes a prefix that will
1968 * be processed during DFS name normalization as specified in
1969 * section 3.3.5.9. Otherwise, the file name is relative to
1970 * the share that is identified by the TreeId in the SMB2
1971 * header.
1972 */
1973 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
1974 int name_len;
1975
1976 req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
1977 rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
1978 &name_len,
256b4c3f
AA		 1979 tcon->treeName, utf16_path);
1980 if (rc)
1981 goto err_free_req;
1982
bea851b8
SF		 1983 req->NameLength = cpu_to_le16(name_len * 2);
1984 uni_path_len = copy_size;
256b4c3f
AA		 1985 /* free before overwriting resource */
1986 kfree(utf16_path);
1987 utf16_path = copy_path;
bea851b8 1988 } else {
256b4c3f 1989 uni_path_len = (2 * UniStrnlen((wchar_t *)utf16_path, PATH_MAX)) + 2;
bea851b8
SF		 1990 /* MUST set path len (NameLength) to 0 opening root of share */
1991 req->NameLength = cpu_to_le16(uni_path_len - 2);
1992 if (uni_path_len % 8 != 0) {
1993 copy_size = roundup(uni_path_len, 8);
1994 copy_path = kzalloc(copy_size, GFP_KERNEL);
1995 if (!copy_path) {
256b4c3f
AA		 1996 rc = -ENOMEM;
1997 goto err_free_req;
bea851b8 1998 }
256b4c3f 1999 memcpy((char *)copy_path, (const char *)utf16_path,
bea851b8
SF		 2000 uni_path_len);
2001 uni_path_len = copy_size;
256b4c3f
AA		 2002 /* free before overwriting resource */
2003 kfree(utf16_path);
2004 utf16_path = copy_path;
bea851b8
SF		 2005 }
2006 }
2007
2008 iov[1].iov_len = uni_path_len;
256b4c3f 2009 iov[1].iov_base = utf16_path;
bea851b8
SF		 2010 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2011
2012 if (tcon->posix_extensions) {
256b4c3f 2013 /* resource #3: posix buf */
bea851b8 2014 rc = add_posix_context(iov, &n_iov, mode);
256b4c3f
AA		 2015 if (rc)
2016 goto err_free_req;
bea851b8
SF		 2017 pc_buf = iov[n_iov-1].iov_base;
2018 }
2019
2020
2021 memset(&rqst, 0, sizeof(struct smb_rqst));
2022 rqst.rq_iov = iov;
2023 rqst.rq_nvec = n_iov;
2024
256b4c3f
AA		 2025 /* resource #4: response buffer */
2026 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
2027 if (rc) {
bea851b8
SF		 2028 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
2029 trace_smb3_posix_mkdir_err(xid, tcon->tid, ses->Suid,
256b4c3f
AA		 2030 CREATE_NOT_FILE,
2031 FILE_WRITE_ATTRIBUTES, rc);
2032 goto err_free_rsp_buf;
2033 }
2034
2035 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2036 trace_smb3_posix_mkdir_done(xid, rsp->PersistentFileId, tcon->tid,
2037 ses->Suid, CREATE_NOT_FILE,
2038 FILE_WRITE_ATTRIBUTES);
bea851b8
SF		 2039
2040 SMB2_close(xid, tcon, rsp->PersistentFileId, rsp->VolatileFileId);
2041
2042 /* Eventually save off posix specific response info and timestaps */
2043
256b4c3f 2044err_free_rsp_buf:
bea851b8 2045 free_rsp_buf(resp_buftype, rsp);
256b4c3f
AA		 2046 kfree(pc_buf);
2047err_free_req:
2048 cifs_small_buf_release(req);
2049err_free_path:
2050 kfree(utf16_path);
bea851b8 2051 return rc;
bea851b8 2052}
bea851b8 2053
2503a0db 2054int
064f6047 2055SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
b42bf888 2056 __u8 *oplock, struct smb2_file_all_info *buf,
9d874c36 2057 struct kvec *err_iov, int *buftype)
2503a0db 2058{
40eff45b 2059 struct smb_rqst rqst;
2503a0db
PS		 2060 struct smb2_create_req *req;
2061 struct smb2_create_rsp *rsp;
2062 struct TCP_Server_Info *server;
064f6047 2063 struct cifs_tcon *tcon = oparms->tcon;
2503a0db 2064 struct cifs_ses *ses = tcon->ses;
ce558b0e 2065 struct kvec iov[5]; /* make sure at least one for each open context */
bf2afee1 2066 struct kvec rsp_iov = {NULL, 0};
2503a0db
PS		 2067 int resp_buftype;
2068 int uni_path_len;
b8c32dbb
PS		 2069 __le16 *copy_path = NULL;
2070 int copy_size;
2503a0db 2071 int rc = 0;
da502f7d 2072 unsigned int n_iov = 2;
ca81983f 2073 __u32 file_attributes = 0;
ce558b0e 2074 char *dhc_buf = NULL, *lc_buf = NULL, *pc_buf = NULL;
7fb8986e 2075 int flags = 0;
4f33bc35 2076 unsigned int total_len;
2503a0db 2077
f96637be 2078 cifs_dbg(FYI, "create/open\n");
2503a0db
PS		 2079
2080 if (ses && (ses->server))
2081 server = ses->server;
2082 else
2083 return -EIO;
2084
4f33bc35
RS		 2085 rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
2086
2503a0db
PS		 2087 if (rc)
2088 return rc;
2089
5a77e75f 2090 if (smb3_encryption_required(tcon))
7fb8986e
PS		 2091 flags |= CIFS_TRANSFORM_REQ;
2092
064f6047 2093 if (oparms->create_options & CREATE_OPTION_READONLY)
ca81983f 2094 file_attributes |= ATTR_READONLY;
db8b631d
SF		 2095 if (oparms->create_options & CREATE_OPTION_SPECIAL)
2096 file_attributes |= ATTR_SYSTEM;
ca81983f 2097
2503a0db 2098 req->ImpersonationLevel = IL_IMPERSONATION;
064f6047 2099 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
2503a0db
PS		 2100 /* File attributes ignored on open (used in create though) */
2101 req->FileAttributes = cpu_to_le32(file_attributes);
2102 req->ShareAccess = FILE_SHARE_ALL_LE;
064f6047
PS		 2103 req->CreateDisposition = cpu_to_le32(oparms->disposition);
2104 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
2503a0db
PS		 2105
2106 iov[0].iov_base = (char *)req;
59aa3718 2107 /* -1 since last byte is buf[0] which is sent below (path) */
4f33bc35 2108 iov[0].iov_len = total_len - 1;
f0712928 2109
4f33bc35 2110 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
f0712928
AA		 2111
2112 /* [MS-SMB2] 2.2.13 NameOffset:
2113 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2114 * the SMB2 header, the file name includes a prefix that will
2115 * be processed during DFS name normalization as specified in
2116 * section 3.3.5.9. Otherwise, the file name is relative to
2117 * the share that is identified by the TreeId in the SMB2
2118 * header.
2119 */
2120 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
2121 int name_len;
2122
4f33bc35 2123 req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
f0712928
AA		 2124 rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
2125 &name_len,
2126 tcon->treeName, path);
b7a73c84
RS		 2127 if (rc) {
2128 cifs_small_buf_release(req);
f0712928 2129 return rc;
b7a73c84 2130 }
f0712928 2131 req->NameLength = cpu_to_le16(name_len * 2);
59aa3718
PS		 2132 uni_path_len = copy_size;
2133 path = copy_path;
f0712928
AA		 2134 } else {
2135 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
2136 /* MUST set path len (NameLength) to 0 opening root of share */
2137 req->NameLength = cpu_to_le16(uni_path_len - 2);
2138 if (uni_path_len % 8 != 0) {
2139 copy_size = roundup(uni_path_len, 8);
2140 copy_path = kzalloc(copy_size, GFP_KERNEL);
b7a73c84
RS		 2141 if (!copy_path) {
2142 cifs_small_buf_release(req);
f0712928 2143 return -ENOMEM;
b7a73c84 2144 }
f0712928
AA		 2145 memcpy((char *)copy_path, (const char *)path,
2146 uni_path_len);
2147 uni_path_len = copy_size;
2148 path = copy_path;
2149 }
2503a0db
PS		 2150 }
2151
59aa3718
PS		 2152 iov[1].iov_len = uni_path_len;
2153 iov[1].iov_base = path;
59aa3718 2154
b8c32dbb
PS		 2155 if (!server->oplocks)
2156 *oplock = SMB2_OPLOCK_LEVEL_NONE;
2157
a41a28bd 2158 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
b8c32dbb
PS		 2159 *oplock == SMB2_OPLOCK_LEVEL_NONE)
2160 req->RequestedOplockLevel = *oplock;
2161 else {
729c0c9d
SB		 2162 rc = add_lease_context(server, iov, &n_iov,
2163 oparms->fid->lease_key, oplock);
d22cbfec 2164 if (rc) {
b8c32dbb
PS		 2165 cifs_small_buf_release(req);
2166 kfree(copy_path);
d22cbfec 2167 return rc;
b8c32dbb 2168 }
da502f7d 2169 lc_buf = iov[n_iov-1].iov_base;
b8c32dbb
PS		 2170 }
2171
63eb3def
PS		 2172 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
2173 /* need to set Next field of lease context if we request it */
a41a28bd 2174 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
63eb3def 2175 struct create_context *ccontext =
da502f7d 2176 (struct create_context *)iov[n_iov-1].iov_base;
1c46943f 2177 ccontext->Next =
a41a28bd 2178 cpu_to_le32(server->vals->create_lease_size);
63eb3def 2179 }
b56eae4d 2180
da502f7d 2181 rc = add_durable_context(iov, &n_iov, oparms,
b56eae4d 2182 tcon->use_persistent);
63eb3def
PS		 2183 if (rc) {
2184 cifs_small_buf_release(req);
2185 kfree(copy_path);
663a9621 2186 kfree(lc_buf);
63eb3def
PS		 2187 return rc;
2188 }
da502f7d 2189 dhc_buf = iov[n_iov-1].iov_base;
63eb3def
PS		 2190 }
2191
ce558b0e
SF		 2192 if (tcon->posix_extensions) {
2193 if (n_iov > 2) {
2194 struct create_context *ccontext =
2195 (struct create_context *)iov[n_iov-1].iov_base;
2196 ccontext->Next =
2197 cpu_to_le32(iov[n_iov-1].iov_len);
2198 }
2199
2200 rc = add_posix_context(iov, &n_iov, oparms->mode);
2201 if (rc) {
2202 cifs_small_buf_release(req);
2203 kfree(copy_path);
2204 kfree(lc_buf);
2205 kfree(dhc_buf);
2206 return rc;
2207 }
2208 pc_buf = iov[n_iov-1].iov_base;
2209 }
ce558b0e 2210
40eff45b
RS		 2211 memset(&rqst, 0, sizeof(struct smb_rqst));
2212 rqst.rq_iov = iov;
2213 rqst.rq_nvec = n_iov;
2214
2215 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
4f33bc35 2216 &rsp_iov);
da502f7d
PS		 2217 cifs_small_buf_release(req);
2218 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2503a0db
PS		 2219
2220 if (rc != 0) {
2221 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
91cb74f5
RS		 2222 if (err_iov && rsp) {
2223 *err_iov = rsp_iov;
9d874c36 2224 *buftype = resp_buftype;
91cb74f5
RS		 2225 resp_buftype = CIFS_NO_BUFFER;
2226 rsp = NULL;
2227 }
28d59363
SF		 2228 trace_smb3_open_err(xid, tcon->tid, ses->Suid,
2229 oparms->create_options, oparms->desired_access, rc);
2503a0db 2230 goto creat_exit;
28d59363
SF		 2231 } else
2232 trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid,
2233 ses->Suid, oparms->create_options,
2234 oparms->desired_access);
2503a0db 2235
064f6047
PS		 2236 oparms->fid->persistent_fid = rsp->PersistentFileId;
2237 oparms->fid->volatile_fid = rsp->VolatileFileId;
f0df737e
PS		 2238
2239 if (buf) {
2240 memcpy(buf, &rsp->CreationTime, 32);
2241 buf->AllocationSize = rsp->AllocationSize;
2242 buf->EndOfFile = rsp->EndofFile;
2243 buf->Attributes = rsp->FileAttributes;
2244 buf->NumberOfLinks = cpu_to_le32(1);
2245 buf->DeletePending = 0;
2246 }
2e44b288 2247
b8c32dbb 2248 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
96164ab2
RS		 2249 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch,
2250 oparms->fid->lease_key);
b8c32dbb
PS		 2251 else
2252 *oplock = rsp->OplockLevel;
2503a0db 2253creat_exit:
b8c32dbb 2254 kfree(copy_path);
663a9621
PS		 2255 kfree(lc_buf);
2256 kfree(dhc_buf);
ce558b0e 2257 kfree(pc_buf);
2503a0db
PS		 2258 free_rsp_buf(resp_buftype, rsp);
2259 return rc;
2260}
2261
4a72dafa
SF		 2262/*
2263 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
2264 */
2265int
2266SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
63a83b86 2267 u64 volatile_fid, u32 opcode, bool is_fsctl,
51146625
AA		 2268 char *in_data, u32 indatalen,
2269 char **out_data, u32 *plen /* returned data len */)
4a72dafa 2270{
40eff45b 2271 struct smb_rqst rqst;
4a72dafa
SF		 2272 struct smb2_ioctl_req *req;
2273 struct smb2_ioctl_rsp *rsp;
8e353106 2274 struct cifs_ses *ses;
4a72dafa 2275 struct kvec iov[2];
da502f7d 2276 struct kvec rsp_iov;
4a72dafa 2277 int resp_buftype;
da502f7d 2278 int n_iov;
4a72dafa 2279 int rc = 0;
7fb8986e 2280 int flags = 0;
97754680 2281 unsigned int total_len;
4a72dafa
SF		 2282
2283 cifs_dbg(FYI, "SMB2 IOCTL\n");
2284
3d1a3745
SF		 2285 if (out_data != NULL)
2286 *out_data = NULL;
2287
4a72dafa
SF		 2288 /* zero out returned data len, in case of error */
2289 if (plen)
2290 *plen = 0;
2291
8e353106
SF		 2292 if (tcon)
2293 ses = tcon->ses;
2294 else
2295 return -EIO;
2296
68a6afa7 2297 if (!ses || !(ses->server))
4a72dafa
SF		 2298 return -EIO;
2299
97754680 2300 rc = smb2_plain_req_init(SMB2_IOCTL, tcon, (void **) &req, &total_len);
4a72dafa
SF		 2301 if (rc)
2302 return rc;
2303
5a77e75f 2304 if (smb3_encryption_required(tcon))
7fb8986e
PS		 2305 flags |= CIFS_TRANSFORM_REQ;
2306
4a72dafa
SF		 2307 req->CtlCode = cpu_to_le32(opcode);
2308 req->PersistentFileId = persistent_fid;
2309 req->VolatileFileId = volatile_fid;
2310
2311 if (indatalen) {
2312 req->InputCount = cpu_to_le32(indatalen);
2313 /* do not set InputOffset if no input data */
2314 req->InputOffset =
97754680 2315 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer));
4a72dafa
SF		 2316 iov[1].iov_base = in_data;
2317 iov[1].iov_len = indatalen;
da502f7d 2318 n_iov = 2;
4a72dafa 2319 } else
da502f7d 2320 n_iov = 1;
4a72dafa
SF		 2321
2322 req->OutputOffset = 0;
2323 req->OutputCount = 0; /* MBZ */
2324
2325 /*
2326 * Could increase MaxOutputResponse, but that would require more
2327 * than one credit. Windows typically sets this smaller, but for some
2328 * ioctls it may be useful to allow server to send more. No point
2329 * limiting what the server can send as long as fits in one credit
7db0a6ef
SF		 2330 * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE
2331 * (by default, note that it can be overridden to make max larger)
2332 * in responses (except for read responses which can be bigger.
2333 * We may want to bump this limit up
4a72dafa 2334 */
7db0a6ef 2335 req->MaxOutputResponse = cpu_to_le32(CIFSMaxBufSize);
4a72dafa
SF		 2336
2337 if (is_fsctl)
2338 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
2339 else
2340 req->Flags = 0;
2341
2342 iov[0].iov_base = (char *)req;
4a72dafa 2343
7ff8d45c
SF		 2344 /*
2345 * If no input data, the size of ioctl struct in
2346 * protocol spec still includes a 1 byte data buffer,
2347 * but if input data passed to ioctl, we do not
2348 * want to double count this, so we do not send
2349 * the dummy one byte of data in iovec[0] if sending
97754680 2350 * input data (in iovec[1]).
7ff8d45c
SF		 2351 */
2352
2353 if (indatalen) {
97754680 2354 iov[0].iov_len = total_len - 1;
7ff8d45c 2355 } else
97754680 2356 iov[0].iov_len = total_len;
7ff8d45c 2357
4587eee0
SF		 2358 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
2359 if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO)
97754680 2360 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
4a72dafa 2361
40eff45b
RS		 2362 memset(&rqst, 0, sizeof(struct smb_rqst));
2363 rqst.rq_iov = iov;
2364 rqst.rq_nvec = n_iov;
2365
2366 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
97754680 2367 &rsp_iov);
da502f7d
PS		 2368 cifs_small_buf_release(req);
2369 rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
4a72dafa 2370
eccb4422
SF		 2371 if (rc != 0)
2372 trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid,
2373 ses->Suid, 0, opcode, rc);
2374
9bf0c9cd 2375 if ((rc != 0) && (rc != -EINVAL)) {
8e353106 2376 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
4a72dafa 2377 goto ioctl_exit;
9bf0c9cd
SF		 2378 } else if (rc == -EINVAL) {
2379 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
2380 (opcode != FSCTL_SRV_COPYCHUNK)) {
8e353106 2381 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
9bf0c9cd
SF		 2382 goto ioctl_exit;
2383 }
4a72dafa
SF		 2384 }
2385
2386 /* check if caller wants to look at return data or just return rc */
2387 if ((plen == NULL) || (out_data == NULL))
2388 goto ioctl_exit;
2389
2390 *plen = le32_to_cpu(rsp->OutputCount);
2391
2392 /* We check for obvious errors in the output buffer length and offset */
2393 if (*plen == 0)
2394 goto ioctl_exit; /* server returned no data */
2395 else if (*plen > 0xFF00) {
2396 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
2397 *plen = 0;
2398 rc = -EIO;
2399 goto ioctl_exit;
2400 }
2401
977b6170 2402 if (rsp_iov.iov_len < le32_to_cpu(rsp->OutputOffset) + *plen) {
4a72dafa
SF		 2403 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
2404 le32_to_cpu(rsp->OutputOffset));
2405 *plen = 0;
2406 rc = -EIO;
2407 goto ioctl_exit;
2408 }
2409
2410 *out_data = kmalloc(*plen, GFP_KERNEL);
2411 if (*out_data == NULL) {
2412 rc = -ENOMEM;
2413 goto ioctl_exit;
2414 }
2415
977b6170 2416 memcpy(*out_data, (char *)rsp + le32_to_cpu(rsp->OutputOffset), *plen);
4a72dafa
SF		 2417ioctl_exit:
2418 free_rsp_buf(resp_buftype, rsp);
2419 return rc;
2420}
2421
64a5cfa6
SF		 2422/*
2423 * Individual callers to ioctl worker function follow
2424 */
2425
2426int
2427SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2428 u64 persistent_fid, u64 volatile_fid)
2429{
2430 int rc;
64a5cfa6
SF		 2431 struct compress_ioctl fsctl_input;
2432 char *ret_data = NULL;
2433
2434 fsctl_input.CompressionState =
bc09d141 2435 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
64a5cfa6
SF		 2436
2437 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
2438 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
2439 (char *)&fsctl_input /* data input */,
2440 2 /* in data len */, &ret_data /* out data */, NULL);
2441
2442 cifs_dbg(FYI, "set compression rc %d\n", rc);
64a5cfa6
SF		 2443
2444 return rc;
2445}
2446
2503a0db 2447int
97ca1762
RS		 2448SMB2_close_flags(const unsigned int xid, struct cifs_tcon *tcon,
2449 u64 persistent_fid, u64 volatile_fid, int flags)
2503a0db 2450{
40eff45b 2451 struct smb_rqst rqst;
2503a0db
PS		 2452 struct smb2_close_req *req;
2453 struct smb2_close_rsp *rsp;
2503a0db
PS		 2454 struct cifs_ses *ses = tcon->ses;
2455 struct kvec iov[1];
da502f7d 2456 struct kvec rsp_iov;
2503a0db
PS		 2457 int resp_buftype;
2458 int rc = 0;
afcccefd 2459 unsigned int total_len;
2503a0db 2460
f96637be 2461 cifs_dbg(FYI, "Close\n");
2503a0db 2462
68a6afa7 2463 if (!ses || !(ses->server))
2503a0db
PS		 2464 return -EIO;
2465
afcccefd 2466 rc = smb2_plain_req_init(SMB2_CLOSE, tcon, (void **) &req, &total_len);
2503a0db
PS		 2467 if (rc)
2468 return rc;
2469
5a77e75f 2470 if (smb3_encryption_required(tcon))
7fb8986e
PS		 2471 flags |= CIFS_TRANSFORM_REQ;
2472
2503a0db
PS		 2473 req->PersistentFileId = persistent_fid;
2474 req->VolatileFileId = volatile_fid;
2475
2476 iov[0].iov_base = (char *)req;
afcccefd 2477 iov[0].iov_len = total_len;
2503a0db 2478
40eff45b
RS		 2479 memset(&rqst, 0, sizeof(struct smb_rqst));
2480 rqst.rq_iov = iov;
2481 rqst.rq_nvec = 1;
2482
2483 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2484 cifs_small_buf_release(req);
2485 rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
2503a0db
PS		 2486
2487 if (rc != 0) {
d4a029d2 2488 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
eccb4422
SF		 2489 trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid,
2490 rc);
2503a0db
PS		 2491 goto close_exit;
2492 }
2493
2503a0db
PS		 2494 /* BB FIXME - decode close response, update inode for caching */
2495
2496close_exit:
2497 free_rsp_buf(resp_buftype, rsp);
2498 return rc;
2499}
be4cb9e3 2500
97ca1762
RS		 2501int
2502SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
2503 u64 persistent_fid, u64 volatile_fid)
2504{
2505 return SMB2_close_flags(xid, tcon, persistent_fid, volatile_fid, 0);
2506}
2507
be4cb9e3 2508static int
1fc6ad2f 2509validate_iov(unsigned int offset, unsigned int buffer_length,
c1596ff5 2510 struct kvec *iov, unsigned int min_buf_size)
be4cb9e3 2511{
c1596ff5 2512 unsigned int smb_len = iov->iov_len;
1fc6ad2f
RS		 2513 char *end_of_smb = smb_len + (char *)iov->iov_base;
2514 char *begin_of_buf = offset + (char *)iov->iov_base;
be4cb9e3
PS		 2515 char *end_of_buf = begin_of_buf + buffer_length;
2516
2517
2518 if (buffer_length < min_buf_size) {
f96637be
JP		 2519 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
2520 buffer_length, min_buf_size);
be4cb9e3
PS		 2521 return -EINVAL;
2522 }
2523
2524 /* check if beyond RFC1001 maximum length */
2525 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
f96637be
JP		 2526 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
2527 buffer_length, smb_len);
be4cb9e3
PS		 2528 return -EINVAL;
2529 }
2530
2531 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
f96637be 2532 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
be4cb9e3
PS		 2533 return -EINVAL;
2534 }
2535
2536 return 0;
2537}
2538
2539/*
2540 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2541 * Caller must free buffer.
2542 */
2543static int
1fc6ad2f 2544validate_and_copy_iov(unsigned int offset, unsigned int buffer_length,
c1596ff5 2545 struct kvec *iov, unsigned int minbufsize,
be4cb9e3 2546 char *data)
be4cb9e3 2547{
1fc6ad2f 2548 char *begin_of_buf = offset + (char *)iov->iov_base;
be4cb9e3
PS		 2549 int rc;
2550
2551 if (!data)
2552 return -EINVAL;
2553
1fc6ad2f 2554 rc = validate_iov(offset, buffer_length, iov, minbufsize);
be4cb9e3
PS		 2555 if (rc)
2556 return rc;
2557
2558 memcpy(data, begin_of_buf, buffer_length);
2559
2560 return 0;
2561}
2562
f0df737e
PS		 2563static int
2564query_info(const unsigned int xid, struct cifs_tcon *tcon,
42c493c1
SP		 2565 u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
2566 u32 additional_info, size_t output_len, size_t min_len, void **data,
2567 u32 *dlen)
be4cb9e3 2568{
40eff45b 2569 struct smb_rqst rqst;
be4cb9e3
PS		 2570 struct smb2_query_info_req *req;
2571 struct smb2_query_info_rsp *rsp = NULL;
2572 struct kvec iov[2];
da502f7d 2573 struct kvec rsp_iov;
be4cb9e3
PS		 2574 int rc = 0;
2575 int resp_buftype;
be4cb9e3 2576 struct cifs_ses *ses = tcon->ses;
7fb8986e 2577 int flags = 0;
b2fb7fec 2578 unsigned int total_len;
be4cb9e3 2579
f96637be 2580 cifs_dbg(FYI, "Query Info\n");
be4cb9e3 2581
68a6afa7 2582 if (!ses || !(ses->server))
be4cb9e3
PS		 2583 return -EIO;
2584
b2fb7fec
RS		 2585 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
2586 &total_len);
be4cb9e3
PS		 2587 if (rc)
2588 return rc;
2589
5a77e75f 2590 if (smb3_encryption_required(tcon))
7fb8986e
PS		 2591 flags |= CIFS_TRANSFORM_REQ;
2592
42c493c1 2593 req->InfoType = info_type;
f0df737e 2594 req->FileInfoClass = info_class;
be4cb9e3
PS		 2595 req->PersistentFileId = persistent_fid;
2596 req->VolatileFileId = volatile_fid;
42c493c1 2597 req->AdditionalInformation = cpu_to_le32(additional_info);
48923d2a
AA		 2598
2599 /*
2600 * We do not use the input buffer (do not send extra byte)
2601 */
2602 req->InputBufferOffset = 0;
48923d2a 2603
f0df737e 2604 req->OutputBufferLength = cpu_to_le32(output_len);
be4cb9e3
PS		 2605
2606 iov[0].iov_base = (char *)req;
b2fb7fec
RS		 2607 /* 1 for Buffer */
2608 iov[0].iov_len = total_len - 1;
be4cb9e3 2609
40eff45b
RS		 2610 memset(&rqst, 0, sizeof(struct smb_rqst));
2611 rqst.rq_iov = iov;
2612 rqst.rq_nvec = 1;
2613
2614 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2615 cifs_small_buf_release(req);
2616 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
e5d04887 2617
be4cb9e3
PS		 2618 if (rc) {
2619 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
eccb4422
SF		 2620 trace_smb3_query_info_err(xid, persistent_fid, tcon->tid,
2621 ses->Suid, info_class, (__u32)info_type, rc);
be4cb9e3
PS		 2622 goto qinf_exit;
2623 }
2624
42c493c1
SP		 2625 if (dlen) {
2626 *dlen = le32_to_cpu(rsp->OutputBufferLength);
2627 if (!*data) {
2628 *data = kmalloc(*dlen, GFP_KERNEL);
2629 if (!*data) {
2630 cifs_dbg(VFS,
2631 "Error %d allocating memory for acl\n",
2632 rc);
2633 *dlen = 0;
2634 goto qinf_exit;
2635 }
2636 }
2637 }
2638
1fc6ad2f 2639 rc = validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset),
be4cb9e3 2640 le32_to_cpu(rsp->OutputBufferLength),
c1596ff5 2641 &rsp_iov, min_len, *data);
be4cb9e3
PS		 2642
2643qinf_exit:
2644 free_rsp_buf(resp_buftype, rsp);
2645 return rc;
2646}
9094fad1 2647
95907fea 2648int SMB2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
7cb3def4
RS		 2649 u64 persistent_fid, u64 volatile_fid,
2650 int ea_buf_size, struct smb2_file_full_ea_info *data)
95907fea
RS		 2651{
2652 return query_info(xid, tcon, persistent_fid, volatile_fid,
2653 FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, 0,
7cb3def4 2654 ea_buf_size,
95907fea
RS		 2655 sizeof(struct smb2_file_full_ea_info),
2656 (void **)&data,
2657 NULL);
2658}
2659
42c493c1
SP		 2660int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
2661 u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data)
2662{
2663 return query_info(xid, tcon, persistent_fid, volatile_fid,
2664 FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0,
2665 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
2666 sizeof(struct smb2_file_all_info), (void **)&data,
2667 NULL);
2668}
2669
f0df737e 2670int
42c493c1 2671SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
f0df737e 2672 u64 persistent_fid, u64 volatile_fid,
42c493c1 2673 void **data, u32 *plen)
f0df737e 2674{
42c493c1
SP		 2675 __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO;
2676 *plen = 0;
2677
f0df737e 2678 return query_info(xid, tcon, persistent_fid, volatile_fid,
42c493c1 2679 0, SMB2_O_INFO_SECURITY, additional_info,
ee25c6dd 2680 SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen);
f0df737e
PS		 2681}
2682
2683int
2684SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
2685 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
2686{
2687 return query_info(xid, tcon, persistent_fid, volatile_fid,
42c493c1
SP		 2688 FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0,
2689 sizeof(struct smb2_file_internal_info),
f0df737e 2690 sizeof(struct smb2_file_internal_info),
42c493c1 2691 (void **)&uniqueid, NULL);
f0df737e
PS		 2692}
2693
9094fad1
PS		 2694/*
2695 * This is a no-op for now. We're not really interested in the reply, but
2696 * rather in the fact that the server sent one and that server->lstrp
2697 * gets updated.
2698 *
2699 * FIXME: maybe we should consider checking that the reply matches request?
2700 */
2701static void
2702smb2_echo_callback(struct mid_q_entry *mid)
2703{
2704 struct TCP_Server_Info *server = mid->callback_data;
31473fc4 2705 struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
9094fad1
PS		 2706 unsigned int credits_received = 1;
2707
2708 if (mid->mid_state == MID_RESPONSE_RECEIVED)
49f466bd 2709 credits_received = le16_to_cpu(rsp->sync_hdr.CreditRequest);
9094fad1
PS		 2710
2711 DeleteMidQEntry(mid);
2712 add_credits(server, credits_received, CIFS_ECHO_OP);
2713}
2714
53e0e11e
PS		 2715void smb2_reconnect_server(struct work_struct *work)
2716{
2717 struct TCP_Server_Info *server = container_of(work,
2718 struct TCP_Server_Info, reconnect.work);
2719 struct cifs_ses *ses;
2720 struct cifs_tcon *tcon, *tcon2;
2721 struct list_head tmp_list;
2722 int tcon_exist = false;
18ea4311
GP		 2723 int rc;
2724 int resched = false;
2725
53e0e11e
PS		 2726
2727 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2728 mutex_lock(&server->reconnect_mutex);
2729
2730 INIT_LIST_HEAD(&tmp_list);
2731 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
2732
2733 spin_lock(&cifs_tcp_ses_lock);
2734 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2735 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
96a988ff 2736 if (tcon->need_reconnect || tcon->need_reopen_files) {
53e0e11e
PS		 2737 tcon->tc_count++;
2738 list_add_tail(&tcon->rlist, &tmp_list);
2739 tcon_exist = true;
2740 }
2741 }
b327a717
AA		 2742 if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) {
2743 list_add_tail(&ses->tcon_ipc->rlist, &tmp_list);
2744 tcon_exist = true;
2745 }
53e0e11e
PS		 2746 }
2747 /*
2748 * Get the reference to server struct to be sure that the last call of
2749 * cifs_put_tcon() in the loop below won't release the server pointer.
2750 */
2751 if (tcon_exist)
2752 server->srv_count++;
2753
2754 spin_unlock(&cifs_tcp_ses_lock);
2755
2756 list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
18ea4311
GP		 2757 rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon);
2758 if (!rc)
96a988ff 2759 cifs_reopen_persistent_handles(tcon);
18ea4311
GP		 2760 else
2761 resched = true;
53e0e11e
PS		 2762 list_del_init(&tcon->rlist);
2763 cifs_put_tcon(tcon);
2764 }
2765
2766 cifs_dbg(FYI, "Reconnecting tcons finished\n");
18ea4311
GP		 2767 if (resched)
2768 queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
53e0e11e
PS		 2769 mutex_unlock(&server->reconnect_mutex);
2770
2771 /* now we can safely release srv struct */
2772 if (tcon_exist)
2773 cifs_put_tcp_session(server, 1);
2774}
2775
9094fad1
PS		 2776int
2777SMB2_echo(struct TCP_Server_Info *server)
2778{
2779 struct smb2_echo_req *req;
2780 int rc = 0;
c713c877 2781 struct kvec iov[1];
738f9de5 2782 struct smb_rqst rqst = { .rq_iov = iov,
c713c877 2783 .rq_nvec = 1 };
7f7ae759 2784 unsigned int total_len;
9094fad1 2785
f96637be 2786 cifs_dbg(FYI, "In echo request\n");
9094fad1 2787
4fcd1813 2788 if (server->tcpStatus == CifsNeedNegotiate) {
53e0e11e
PS		 2789 /* No need to send echo on newly established connections */
2790 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
2791 return rc;
4fcd1813
SF		 2792 }
2793
7f7ae759 2794 rc = smb2_plain_req_init(SMB2_ECHO, NULL, (void **)&req, &total_len);
9094fad1
PS		 2795 if (rc)
2796 return rc;
2797
7f7ae759 2798 req->sync_hdr.CreditRequest = cpu_to_le16(1);
9094fad1 2799
c713c877
RS		 2800 iov[0].iov_len = total_len;
2801 iov[0].iov_base = (char *)req;
9094fad1 2802
9b7c18a2
PS		 2803 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
2804 server, CIFS_ECHO_OP);
9094fad1 2805 if (rc)
f96637be 2806 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
9094fad1
PS		 2807
2808 cifs_small_buf_release(req);
2809 return rc;
2810}
7a5cfb19
PS		 2811
2812int
2813SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2814 u64 volatile_fid)
2815{
40eff45b 2816 struct smb_rqst rqst;
7a5cfb19 2817 struct smb2_flush_req *req;
7a5cfb19
PS		 2818 struct cifs_ses *ses = tcon->ses;
2819 struct kvec iov[1];
da502f7d 2820 struct kvec rsp_iov;
7a5cfb19
PS		 2821 int resp_buftype;
2822 int rc = 0;
7fb8986e 2823 int flags = 0;
1f444e4c 2824 unsigned int total_len;
7a5cfb19 2825
f96637be 2826 cifs_dbg(FYI, "Flush\n");
7a5cfb19 2827
68a6afa7 2828 if (!ses || !(ses->server))
7a5cfb19
PS		 2829 return -EIO;
2830
1f444e4c 2831 rc = smb2_plain_req_init(SMB2_FLUSH, tcon, (void **) &req, &total_len);
7a5cfb19
PS		 2832 if (rc)
2833 return rc;
2834
5a77e75f 2835 if (smb3_encryption_required(tcon))
7fb8986e
PS		 2836 flags |= CIFS_TRANSFORM_REQ;
2837
7a5cfb19
PS		 2838 req->PersistentFileId = persistent_fid;
2839 req->VolatileFileId = volatile_fid;
2840
2841 iov[0].iov_base = (char *)req;
1f444e4c 2842 iov[0].iov_len = total_len;
7a5cfb19 2843
40eff45b
RS		 2844 memset(&rqst, 0, sizeof(struct smb_rqst));
2845 rqst.rq_iov = iov;
2846 rqst.rq_nvec = 1;
2847
2848 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 2849 cifs_small_buf_release(req);
7a5cfb19 2850
eccb4422 2851 if (rc != 0) {
7a5cfb19 2852 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
eccb4422
SF		 2853 trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid,
2854 rc);
2855 }
7a5cfb19 2856
da502f7d 2857 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
7a5cfb19
PS		 2858 return rc;
2859}
09a4707e
PS		 2860
2861/*
2862 * To form a chain of read requests, any read requests after the first should
2863 * have the end_of_chain boolean set to true.
2864 */
2865static int
738f9de5 2866smb2_new_read_req(void **buf, unsigned int *total_len,
2dabfd5b
LL		 2867 struct cifs_io_parms *io_parms, struct cifs_readdata *rdata,
2868 unsigned int remaining_bytes, int request_type)
09a4707e
PS		 2869{
2870 int rc = -EACCES;
b8f57ee8 2871 struct smb2_read_plain_req *req = NULL;
31473fc4 2872 struct smb2_sync_hdr *shdr;
2dabfd5b 2873 struct TCP_Server_Info *server;
09a4707e 2874
b8f57ee8
PS		 2875 rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
2876 total_len);
09a4707e
PS		 2877 if (rc)
2878 return rc;
2dabfd5b
LL		 2879
2880 server = io_parms->tcon->ses->server;
2881 if (server == NULL)
09a4707e
PS		 2882 return -ECONNABORTED;
2883
b8f57ee8 2884 shdr = &req->sync_hdr;
31473fc4 2885 shdr->ProcessId = cpu_to_le32(io_parms->pid);
09a4707e
PS		 2886
2887 req->PersistentFileId = io_parms->persistent_fid;
2888 req->VolatileFileId = io_parms->volatile_fid;
2889 req->ReadChannelInfoOffset = 0; /* reserved */
2890 req->ReadChannelInfoLength = 0; /* reserved */
2891 req->Channel = 0; /* reserved */
2892 req->MinimumCount = 0;
2893 req->Length = cpu_to_le32(io_parms->length);
2894 req->Offset = cpu_to_le64(io_parms->offset);
bd3dcc6a
LL		 2895#ifdef CONFIG_CIFS_SMB_DIRECT
2896 /*
2897 * If we want to do a RDMA write, fill in and append
2898 * smbd_buffer_descriptor_v1 to the end of read request
2899 */
bb4c0419 2900 if (server->rdma && rdata && !server->sign &&
bd3dcc6a
LL		 2901 rdata->bytes >= server->smbd_conn->rdma_readwrite_threshold) {
2902
2903 struct smbd_buffer_descriptor_v1 *v1;
2904 bool need_invalidate =
2905 io_parms->tcon->ses->server->dialect == SMB30_PROT_ID;
2906
2907 rdata->mr = smbd_register_mr(
2908 server->smbd_conn, rdata->pages,
7cf20bce
LL		 2909 rdata->nr_pages, rdata->page_offset,
2910 rdata->tailsz, true, need_invalidate);
bd3dcc6a
LL		 2911 if (!rdata->mr)
2912 return -ENOBUFS;
2913
2914 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
2915 if (need_invalidate)
2916 req->Channel = SMB2_CHANNEL_RDMA_V1;
2917 req->ReadChannelInfoOffset =
2026b06e 2918 cpu_to_le16(offsetof(struct smb2_read_plain_req, Buffer));
bd3dcc6a 2919 req->ReadChannelInfoLength =
2026b06e 2920 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
bd3dcc6a 2921 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
2026b06e
SF		 2922 v1->offset = cpu_to_le64(rdata->mr->mr->iova);
2923 v1->token = cpu_to_le32(rdata->mr->mr->rkey);
2924 v1->length = cpu_to_le32(rdata->mr->mr->length);
bd3dcc6a
LL		 2925
2926 *total_len += sizeof(*v1) - 1;
2927 }
2928#endif
09a4707e
PS		 2929 if (request_type & CHAINED_REQUEST) {
2930 if (!(request_type & END_OF_CHAIN)) {
b8f57ee8
PS		 2931 /* next 8-byte aligned request */
2932 *total_len = DIV_ROUND_UP(*total_len, 8) * 8;
2933 shdr->NextCommand = cpu_to_le32(*total_len);
09a4707e 2934 } else /* END_OF_CHAIN */
31473fc4 2935 shdr->NextCommand = 0;
09a4707e 2936 if (request_type & RELATED_REQUEST) {
31473fc4 2937 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
09a4707e
PS		 2938 /*
2939 * Related requests use info from previous read request
2940 * in chain.
2941 */
31473fc4
PS		 2942 shdr->SessionId = 0xFFFFFFFF;
2943 shdr->TreeId = 0xFFFFFFFF;
09a4707e
PS		 2944 req->PersistentFileId = 0xFFFFFFFF;
2945 req->VolatileFileId = 0xFFFFFFFF;
2946 }
2947 }
2948 if (remaining_bytes > io_parms->length)
2949 req->RemainingBytes = cpu_to_le32(remaining_bytes);
2950 else
2951 req->RemainingBytes = 0;
2952
738f9de5 2953 *buf = req;
09a4707e
PS		 2954 return rc;
2955}
2956
2957static void
2958smb2_readv_callback(struct mid_q_entry *mid)
2959{
2960 struct cifs_readdata *rdata = mid->callback_data;
2961 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
2962 struct TCP_Server_Info *server = tcon->ses->server;
738f9de5 2963 struct smb2_sync_hdr *shdr =
977b6170 2964 (struct smb2_sync_hdr *)rdata->iov[0].iov_base;
09a4707e 2965 unsigned int credits_received = 1;
738f9de5
PS		 2966 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2967 .rq_nvec = 2,
8321fec4 2968 .rq_pages = rdata->pages,
1dbe3466 2969 .rq_offset = rdata->page_offset,
8321fec4
JL		 2970 .rq_npages = rdata->nr_pages,
2971 .rq_pagesz = rdata->pagesz,
2972 .rq_tailsz = rdata->tailsz };
09a4707e 2973
f96637be
JP		 2974 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2975 __func__, mid->mid, mid->mid_state, rdata->result,
2976 rdata->bytes);
09a4707e
PS		 2977
2978 switch (mid->mid_state) {
2979 case MID_RESPONSE_RECEIVED:
31473fc4 2980 credits_received = le16_to_cpu(shdr->CreditRequest);
09a4707e 2981 /* result already set, check signature */
4326ed2f 2982 if (server->sign && !mid->decrypted) {
3c1bf7e4
PS		 2983 int rc;
2984
0b688cfc 2985 rc = smb2_verify_signature(&rqst, server);
3c1bf7e4 2986 if (rc)
f96637be
JP		 2987 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
2988 rc);
3c1bf7e4 2989 }
09a4707e 2990 /* FIXME: should this be counted toward the initiating task? */
34a54d61
PS		 2991 task_io_account_read(rdata->got_bytes);
2992 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 2993 break;
2994 case MID_REQUEST_SUBMITTED:
2995 case MID_RETRY_NEEDED:
2996 rdata->result = -EAGAIN;
d913ed17
PS		 2997 if (server->sign && rdata->got_bytes)
2998 /* reset bytes number since we can not check a sign */
2999 rdata->got_bytes = 0;
3000 /* FIXME: should this be counted toward the initiating task? */
3001 task_io_account_read(rdata->got_bytes);
3002 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 3003 break;
3004 default:
3005 if (rdata->result != -ENODATA)
3006 rdata->result = -EIO;
3007 }
bd3dcc6a
LL		 3008#ifdef CONFIG_CIFS_SMB_DIRECT
3009 /*
3010 * If this rdata has a memmory registered, the MR can be freed
3011 * MR needs to be freed as soon as I/O finishes to prevent deadlock
3012 * because they have limited number and are used for future I/Os
3013 */
3014 if (rdata->mr) {
3015 smbd_deregister_mr(rdata->mr);
3016 rdata->mr = NULL;
3017 }
3018#endif
09a4707e
PS		 3019 if (rdata->result)
3020 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
3021
3022 queue_work(cifsiod_wq, &rdata->work);
3023 DeleteMidQEntry(mid);
3024 add_credits(server, credits_received, 0);
3025}
3026
738f9de5 3027/* smb2_async_readv - send an async read, and set up mid to handle result */
09a4707e
PS		 3028int
3029smb2_async_readv(struct cifs_readdata *rdata)
3030{
bed9da02 3031 int rc, flags = 0;
31473fc4
PS		 3032 char *buf;
3033 struct smb2_sync_hdr *shdr;
09a4707e 3034 struct cifs_io_parms io_parms;
738f9de5 3035 struct smb_rqst rqst = { .rq_iov = rdata->iov,
c713c877 3036 .rq_nvec = 1 };
bed9da02 3037 struct TCP_Server_Info *server;
738f9de5 3038 unsigned int total_len;
09a4707e 3039
f96637be
JP		 3040 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
3041 __func__, rdata->offset, rdata->bytes);
09a4707e
PS		 3042
3043 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
3044 io_parms.offset = rdata->offset;
3045 io_parms.length = rdata->bytes;
3046 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
3047 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
3048 io_parms.pid = rdata->pid;
bed9da02
PS		 3049
3050 server = io_parms.tcon->ses->server;
3051
2dabfd5b
LL		 3052 rc = smb2_new_read_req(
3053 (void **) &buf, &total_len, &io_parms, rdata, 0, 0);
bed9da02
PS		 3054 if (rc) {
3055 if (rc == -EAGAIN && rdata->credits) {
3056 /* credits was reset by reconnect */
3057 rdata->credits = 0;
3058 /* reduce in_flight value since we won't send the req */
3059 spin_lock(&server->req_lock);
3060 server->in_flight--;
3061 spin_unlock(&server->req_lock);
3062 }
09a4707e 3063 return rc;
bed9da02 3064 }
09a4707e 3065
5a77e75f 3066 if (smb3_encryption_required(io_parms.tcon))
7fb8986e
PS		 3067 flags |= CIFS_TRANSFORM_REQ;
3068
c713c877
RS		 3069 rdata->iov[0].iov_base = buf;
3070 rdata->iov[0].iov_len = total_len;
b8f57ee8
PS		 3071
3072 shdr = (struct smb2_sync_hdr *)buf;
09a4707e 3073
bed9da02 3074 if (rdata->credits) {
31473fc4 3075 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
bed9da02 3076 SMB2_MAX_BUFFER_SIZE));
31473fc4 3077 shdr->CreditRequest = shdr->CreditCharge;
bed9da02
PS		 3078 spin_lock(&server->req_lock);
3079 server->credits += rdata->credits -
31473fc4 3080 le16_to_cpu(shdr->CreditCharge);
bed9da02
PS		 3081 spin_unlock(&server->req_lock);
3082 wake_up(&server->request_q);
7fb8986e 3083 flags |= CIFS_HAS_CREDITS;
bed9da02
PS		 3084 }
3085
09a4707e 3086 kref_get(&rdata->refcount);
fec344e3 3087 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
09a4707e 3088 cifs_readv_receive, smb2_readv_callback,
4326ed2f 3089 smb3_handle_read_data, rdata, flags);
e5d04887 3090 if (rc) {
09a4707e 3091 kref_put(&rdata->refcount, cifs_readdata_release);
e5d04887 3092 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
eccb4422
SF		 3093 trace_smb3_read_err(rc, 0 /* xid */, io_parms.persistent_fid,
3094 io_parms.tcon->tid, io_parms.tcon->ses->Suid,
3095 io_parms.offset, io_parms.length);
3096 } else
3097 trace_smb3_read_done(0 /* xid */, io_parms.persistent_fid,
3098 io_parms.tcon->tid, io_parms.tcon->ses->Suid,
3099 io_parms.offset, io_parms.length);
09a4707e
PS		 3100
3101 cifs_small_buf_release(buf);
3102 return rc;
3103}
33319141 3104
d8e05039
PS		 3105int
3106SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
3107 unsigned int *nbytes, char **buf, int *buf_type)
3108{
40eff45b 3109 struct smb_rqst rqst;
d8e05039 3110 int resp_buftype, rc = -EACCES;
b8f57ee8 3111 struct smb2_read_plain_req *req = NULL;
d8e05039 3112 struct smb2_read_rsp *rsp = NULL;
f5688a6d 3113 struct kvec iov[1];
da502f7d 3114 struct kvec rsp_iov;
738f9de5 3115 unsigned int total_len;
7fb8986e
PS		 3116 int flags = CIFS_LOG_ERROR;
3117 struct cifs_ses *ses = io_parms->tcon->ses;
d8e05039
PS		 3118
3119 *nbytes = 0;
2dabfd5b 3120 rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0);
d8e05039
PS		 3121 if (rc)
3122 return rc;
3123
5a77e75f 3124 if (smb3_encryption_required(io_parms->tcon))
7fb8986e
PS		 3125 flags |= CIFS_TRANSFORM_REQ;
3126
f5688a6d
RS		 3127 iov[0].iov_base = (char *)req;
3128 iov[0].iov_len = total_len;
b8f57ee8 3129
40eff45b
RS		 3130 memset(&rqst, 0, sizeof(struct smb_rqst));
3131 rqst.rq_iov = iov;
3132 rqst.rq_nvec = 1;
3133
3134 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
b8f57ee8 3135 cifs_small_buf_release(req);
d8e05039 3136
da502f7d 3137 rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
d8e05039 3138
a821df3f
RS		 3139 if (rc) {
3140 if (rc != -ENODATA) {
3141 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
3142 cifs_dbg(VFS, "Send error in read = %d\n", rc);
3143 }
eccb4422
SF		 3144 trace_smb3_read_err(rc, xid, req->PersistentFileId,
3145 io_parms->tcon->tid, ses->Suid,
3146 io_parms->offset, io_parms->length);
da502f7d 3147 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
a821df3f 3148 return rc == -ENODATA ? 0 : rc;
eccb4422
SF		 3149 } else
3150 trace_smb3_read_done(xid, req->PersistentFileId,
3151 io_parms->tcon->tid, ses->Suid,
3152 io_parms->offset, io_parms->length);
d8e05039 3153
a821df3f
RS		 3154 *nbytes = le32_to_cpu(rsp->DataLength);
3155 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
3156 (*nbytes > io_parms->length)) {
3157 cifs_dbg(FYI, "bad length %d for count %d\n",
3158 *nbytes, io_parms->length);
3159 rc = -EIO;
3160 *nbytes = 0;
d8e05039
PS		 3161 }
3162
3163 if (*buf) {
977b6170 3164 memcpy(*buf, (char *)rsp + rsp->DataOffset, *nbytes);
da502f7d 3165 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
d8e05039 3166 } else if (resp_buftype != CIFS_NO_BUFFER) {
da502f7d 3167 *buf = rsp_iov.iov_base;
d8e05039
PS		 3168 if (resp_buftype == CIFS_SMALL_BUFFER)
3169 *buf_type = CIFS_SMALL_BUFFER;
3170 else if (resp_buftype == CIFS_LARGE_BUFFER)
3171 *buf_type = CIFS_LARGE_BUFFER;
3172 }
3173 return rc;
3174}
3175
33319141
PS		 3176/*
3177 * Check the mid_state and signature on received buffer (if any), and queue the
3178 * workqueue completion task.
3179 */
3180static void
3181smb2_writev_callback(struct mid_q_entry *mid)
3182{
3183 struct cifs_writedata *wdata = mid->callback_data;
3184 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
3185 unsigned int written;
3186 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
3187 unsigned int credits_received = 1;
3188
3189 switch (mid->mid_state) {
3190 case MID_RESPONSE_RECEIVED:
49f466bd 3191 credits_received = le16_to_cpu(rsp->sync_hdr.CreditRequest);
33319141
PS		 3192 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
3193 if (wdata->result != 0)
3194 break;
3195
3196 written = le32_to_cpu(rsp->DataLength);
3197 /*
3198 * Mask off high 16 bits when bytes written as returned
3199 * by the server is greater than bytes requested by the
3200 * client. OS/2 servers are known to set incorrect
3201 * CountHigh values.
3202 */
3203 if (written > wdata->bytes)
3204 written &= 0xFFFF;
3205
3206 if (written < wdata->bytes)
3207 wdata->result = -ENOSPC;
3208 else
3209 wdata->bytes = written;
3210 break;
3211 case MID_REQUEST_SUBMITTED:
3212 case MID_RETRY_NEEDED:
3213 wdata->result = -EAGAIN;
3214 break;
3215 default:
3216 wdata->result = -EIO;
3217 break;
3218 }
db223a59
LL		 3219#ifdef CONFIG_CIFS_SMB_DIRECT
3220 /*
3221 * If this wdata has a memory registered, the MR can be freed
3222 * The number of MRs available is limited, it's important to recover
3223 * used MR as soon as I/O is finished. Hold MR longer in the later
3224 * I/O process can possibly result in I/O deadlock due to lack of MR
3225 * to send request on I/O retry
3226 */
3227 if (wdata->mr) {
3228 smbd_deregister_mr(wdata->mr);
3229 wdata->mr = NULL;
3230 }
3231#endif
33319141
PS		 3232 if (wdata->result)
3233 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
3234
3235 queue_work(cifsiod_wq, &wdata->work);
3236 DeleteMidQEntry(mid);
3237 add_credits(tcon->ses->server, credits_received, 0);
3238}
3239
3240/* smb2_async_writev - send an async write, and set up mid to handle result */
3241int
4a5c80d7
SF		 3242smb2_async_writev(struct cifs_writedata *wdata,
3243 void (*release)(struct kref *kref))
33319141 3244{
cb7e9eab 3245 int rc = -EACCES, flags = 0;
33319141 3246 struct smb2_write_req *req = NULL;
31473fc4 3247 struct smb2_sync_hdr *shdr;
33319141 3248 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
cb7e9eab 3249 struct TCP_Server_Info *server = tcon->ses->server;
c713c877 3250 struct kvec iov[1];
738f9de5 3251 struct smb_rqst rqst = { };
f5688a6d 3252 unsigned int total_len;
33319141 3253
f5688a6d 3254 rc = smb2_plain_req_init(SMB2_WRITE, tcon, (void **) &req, &total_len);
cb7e9eab
PS		 3255 if (rc) {
3256 if (rc == -EAGAIN && wdata->credits) {
3257 /* credits was reset by reconnect */
3258 wdata->credits = 0;
3259 /* reduce in_flight value since we won't send the req */
3260 spin_lock(&server->req_lock);
3261 server->in_flight--;
3262 spin_unlock(&server->req_lock);
3263 }
33319141 3264 goto async_writev_out;
cb7e9eab 3265 }
33319141 3266
5a77e75f 3267 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3268 flags |= CIFS_TRANSFORM_REQ;
3269
f5688a6d 3270 shdr = (struct smb2_sync_hdr *)req;
31473fc4 3271 shdr->ProcessId = cpu_to_le32(wdata->cfile->pid);
33319141
PS		 3272
3273 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
3274 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
3275 req->WriteChannelInfoOffset = 0;
3276 req->WriteChannelInfoLength = 0;
3277 req->Channel = 0;
3278 req->Offset = cpu_to_le64(wdata->offset);
33319141 3279 req->DataOffset = cpu_to_le16(
f5688a6d 3280 offsetof(struct smb2_write_req, Buffer));
33319141 3281 req->RemainingBytes = 0;
db223a59
LL		 3282#ifdef CONFIG_CIFS_SMB_DIRECT
3283 /*
3284 * If we want to do a server RDMA read, fill in and append
3285 * smbd_buffer_descriptor_v1 to the end of write request
3286 */
bb4c0419 3287 if (server->rdma && !server->sign && wdata->bytes >=
db223a59
LL		 3288 server->smbd_conn->rdma_readwrite_threshold) {
3289
3290 struct smbd_buffer_descriptor_v1 *v1;
3291 bool need_invalidate = server->dialect == SMB30_PROT_ID;
3292
3293 wdata->mr = smbd_register_mr(
3294 server->smbd_conn, wdata->pages,
7cf20bce
LL		 3295 wdata->nr_pages, wdata->page_offset,
3296 wdata->tailsz, false, need_invalidate);
db223a59
LL		 3297 if (!wdata->mr) {
3298 rc = -ENOBUFS;
3299 goto async_writev_out;
3300 }
3301 req->Length = 0;
3302 req->DataOffset = 0;
7cf20bce
LL		 3303 if (wdata->nr_pages > 1)
3304 req->RemainingBytes =
3305 cpu_to_le32(
3306 (wdata->nr_pages - 1) * wdata->pagesz -
3307 wdata->page_offset + wdata->tailsz
3308 );
3309 else
3310 req->RemainingBytes = cpu_to_le32(wdata->tailsz);
db223a59
LL		 3311 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
3312 if (need_invalidate)
3313 req->Channel = SMB2_CHANNEL_RDMA_V1;
3314 req->WriteChannelInfoOffset =
2026b06e 3315 cpu_to_le16(offsetof(struct smb2_write_req, Buffer));
db223a59 3316 req->WriteChannelInfoLength =
2026b06e 3317 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
db223a59 3318 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
2026b06e
SF		 3319 v1->offset = cpu_to_le64(wdata->mr->mr->iova);
3320 v1->token = cpu_to_le32(wdata->mr->mr->rkey);
3321 v1->length = cpu_to_le32(wdata->mr->mr->length);
db223a59
LL		 3322 }
3323#endif
c713c877
RS		 3324 iov[0].iov_len = total_len - 1;
3325 iov[0].iov_base = (char *)req;
33319141 3326
738f9de5 3327 rqst.rq_iov = iov;
c713c877 3328 rqst.rq_nvec = 1;
eddb079d 3329 rqst.rq_pages = wdata->pages;
57a929a6 3330 rqst.rq_offset = wdata->page_offset;
eddb079d
JL		 3331 rqst.rq_npages = wdata->nr_pages;
3332 rqst.rq_pagesz = wdata->pagesz;
3333 rqst.rq_tailsz = wdata->tailsz;
db223a59
LL		 3334#ifdef CONFIG_CIFS_SMB_DIRECT
3335 if (wdata->mr) {
c713c877 3336 iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1);
db223a59
LL		 3337 rqst.rq_npages = 0;
3338 }
3339#endif
f96637be
JP		 3340 cifs_dbg(FYI, "async write at %llu %u bytes\n",
3341 wdata->offset, wdata->bytes);
33319141 3342
db223a59
LL		 3343#ifdef CONFIG_CIFS_SMB_DIRECT
3344 /* For RDMA read, I/O size is in RemainingBytes not in Length */
3345 if (!wdata->mr)
3346 req->Length = cpu_to_le32(wdata->bytes);
3347#else
33319141 3348 req->Length = cpu_to_le32(wdata->bytes);
db223a59 3349#endif
33319141 3350
cb7e9eab 3351 if (wdata->credits) {
31473fc4 3352 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
cb7e9eab 3353 SMB2_MAX_BUFFER_SIZE));
31473fc4 3354 shdr->CreditRequest = shdr->CreditCharge;
cb7e9eab
PS		 3355 spin_lock(&server->req_lock);
3356 server->credits += wdata->credits -
31473fc4 3357 le16_to_cpu(shdr->CreditCharge);
cb7e9eab
PS		 3358 spin_unlock(&server->req_lock);
3359 wake_up(&server->request_q);
7fb8986e 3360 flags |= CIFS_HAS_CREDITS;
cb7e9eab
PS		 3361 }
3362
33319141 3363 kref_get(&wdata->refcount);
9b7c18a2
PS		 3364 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
3365 wdata, flags);
33319141 3366
e5d04887 3367 if (rc) {
eccb4422
SF		 3368 trace_smb3_write_err(0 /* no xid */, req->PersistentFileId,
3369 tcon->tid, tcon->ses->Suid, wdata->offset,
3370 wdata->bytes, rc);
4a5c80d7 3371 kref_put(&wdata->refcount, release);
e5d04887 3372 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
eccb4422
SF		 3373 } else
3374 trace_smb3_write_done(0 /* no xid */, req->PersistentFileId,
3375 tcon->tid, tcon->ses->Suid, wdata->offset,
3376 wdata->bytes);
33319141 3377
33319141
PS		 3378async_writev_out:
3379 cifs_small_buf_release(req);
33319141
PS		 3380 return rc;
3381}
009d3443
PS		 3382
3383/*
3384 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
3385 * The length field from io_parms must be at least 1 and indicates a number of
3386 * elements with data to write that begins with position 1 in iov array. All
3387 * data length is specified by count.
3388 */
3389int
3390SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
3391 unsigned int *nbytes, struct kvec *iov, int n_vec)
3392{
40eff45b 3393 struct smb_rqst rqst;
009d3443
PS		 3394 int rc = 0;
3395 struct smb2_write_req *req = NULL;
3396 struct smb2_write_rsp *rsp = NULL;
3397 int resp_buftype;
da502f7d 3398 struct kvec rsp_iov;
7fb8986e 3399 int flags = 0;
f5688a6d 3400 unsigned int total_len;
da502f7d 3401
009d3443
PS		 3402 *nbytes = 0;
3403
3404 if (n_vec < 1)
3405 return rc;
3406
f5688a6d
RS		 3407 rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, (void **) &req,
3408 &total_len);
009d3443
PS		 3409 if (rc)
3410 return rc;
3411
3412 if (io_parms->tcon->ses->server == NULL)
3413 return -ECONNABORTED;
3414
5a77e75f 3415 if (smb3_encryption_required(io_parms->tcon))
7fb8986e
PS		 3416 flags |= CIFS_TRANSFORM_REQ;
3417
f5688a6d 3418 req->sync_hdr.ProcessId = cpu_to_le32(io_parms->pid);
009d3443
PS		 3419
3420 req->PersistentFileId = io_parms->persistent_fid;
3421 req->VolatileFileId = io_parms->volatile_fid;
3422 req->WriteChannelInfoOffset = 0;
3423 req->WriteChannelInfoLength = 0;
3424 req->Channel = 0;
3425 req->Length = cpu_to_le32(io_parms->length);
3426 req->Offset = cpu_to_le64(io_parms->offset);
009d3443 3427 req->DataOffset = cpu_to_le16(
f5688a6d 3428 offsetof(struct smb2_write_req, Buffer));
009d3443
PS		 3429 req->RemainingBytes = 0;
3430
3431 iov[0].iov_base = (char *)req;
f5688a6d
RS		 3432 /* 1 for Buffer */
3433 iov[0].iov_len = total_len - 1;
009d3443 3434
40eff45b
RS		 3435 memset(&rqst, 0, sizeof(struct smb_rqst));
3436 rqst.rq_iov = iov;
3437 rqst.rq_nvec = n_vec + 1;
3438
3439 rc = cifs_send_recv(xid, io_parms->tcon->ses, &rqst,
f5688a6d 3440 &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 3441 cifs_small_buf_release(req);
3442 rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
009d3443
PS		 3443
3444 if (rc) {
eccb4422
SF		 3445 trace_smb3_write_err(xid, req->PersistentFileId,
3446 io_parms->tcon->tid,
3447 io_parms->tcon->ses->Suid,
3448 io_parms->offset, io_parms->length, rc);
009d3443 3449 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
f96637be 3450 cifs_dbg(VFS, "Send error in write = %d\n", rc);
eccb4422 3451 } else {
009d3443 3452 *nbytes = le32_to_cpu(rsp->DataLength);
eccb4422
SF		 3453 trace_smb3_write_done(xid, req->PersistentFileId,
3454 io_parms->tcon->tid,
3455 io_parms->tcon->ses->Suid,
3456 io_parms->offset, *nbytes);
3457 }
e5d04887
PS		 3458
3459 free_rsp_buf(resp_buftype, rsp);
009d3443
PS		 3460 return rc;
3461}
35143eb5 3462
d324f08d
PS		 3463static unsigned int
3464num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
3465{
3466 int len;
3467 unsigned int entrycount = 0;
3468 unsigned int next_offset = 0;
3469 FILE_DIRECTORY_INFO *entryptr;
3470
3471 if (bufstart == NULL)
3472 return 0;
3473
3474 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
3475
3476 while (1) {
3477 entryptr = (FILE_DIRECTORY_INFO *)
3478 ((char *)entryptr + next_offset);
3479
3480 if ((char *)entryptr + size > end_of_buf) {
f96637be 3481 cifs_dbg(VFS, "malformed search entry would overflow\n");
d324f08d
PS		 3482 break;
3483 }
3484
3485 len = le32_to_cpu(entryptr->FileNameLength);
3486 if ((char *)entryptr + len + size > end_of_buf) {
f96637be
JP		 3487 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
3488 end_of_buf);
d324f08d
PS		 3489 break;
3490 }
3491
3492 *lastentry = (char *)entryptr;
3493 entrycount++;
3494
3495 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
3496 if (!next_offset)
3497 break;
3498 }
3499
3500 return entrycount;
3501}
3502
3503/*
3504 * Readdir/FindFirst
3505 */
3506int
3507SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
3508 u64 persistent_fid, u64 volatile_fid, int index,
3509 struct cifs_search_info *srch_inf)
3510{
40eff45b 3511 struct smb_rqst rqst;
d324f08d
PS		 3512 struct smb2_query_directory_req *req;
3513 struct smb2_query_directory_rsp *rsp = NULL;
3514 struct kvec iov[2];
da502f7d 3515 struct kvec rsp_iov;
d324f08d
PS		 3516 int rc = 0;
3517 int len;
75fdfc84 3518 int resp_buftype = CIFS_NO_BUFFER;
d324f08d
PS		 3519 unsigned char *bufptr;
3520 struct TCP_Server_Info *server;
3521 struct cifs_ses *ses = tcon->ses;
3522 __le16 asteriks = cpu_to_le16('*');
3523 char *end_of_smb;
3524 unsigned int output_size = CIFSMaxBufSize;
3525 size_t info_buf_size;
7fb8986e 3526 int flags = 0;
7c00c3a6 3527 unsigned int total_len;
d324f08d
PS		 3528
3529 if (ses && (ses->server))
3530 server = ses->server;
3531 else
3532 return -EIO;
3533
7c00c3a6
RS		 3534 rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req,
3535 &total_len);
d324f08d
PS		 3536 if (rc)
3537 return rc;
3538
5a77e75f 3539 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3540 flags |= CIFS_TRANSFORM_REQ;
3541
d324f08d
PS		 3542 switch (srch_inf->info_level) {
3543 case SMB_FIND_FILE_DIRECTORY_INFO:
3544 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
3545 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
3546 break;
3547 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
3548 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
3549 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
3550 break;
3551 default:
f96637be
JP		 3552 cifs_dbg(VFS, "info level %u isn't supported\n",
3553 srch_inf->info_level);
d324f08d
PS		 3554 rc = -EINVAL;
3555 goto qdir_exit;
3556 }
3557
3558 req->FileIndex = cpu_to_le32(index);
3559 req->PersistentFileId = persistent_fid;
3560 req->VolatileFileId = volatile_fid;
3561
3562 len = 0x2;
3563 bufptr = req->Buffer;
3564 memcpy(bufptr, &asteriks, len);
3565
3566 req->FileNameOffset =
7c00c3a6 3567 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1);
d324f08d
PS		 3568 req->FileNameLength = cpu_to_le16(len);
3569 /*
3570 * BB could be 30 bytes or so longer if we used SMB2 specific
3571 * buffer lengths, but this is safe and close enough.
3572 */
3573 output_size = min_t(unsigned int, output_size, server->maxBuf);
3574 output_size = min_t(unsigned int, output_size, 2 << 15);
3575 req->OutputBufferLength = cpu_to_le32(output_size);
3576
3577 iov[0].iov_base = (char *)req;
7c00c3a6
RS		 3578 /* 1 for Buffer */
3579 iov[0].iov_len = total_len - 1;
d324f08d
PS		 3580
3581 iov[1].iov_base = (char *)(req->Buffer);
3582 iov[1].iov_len = len;
3583
40eff45b
RS		 3584 memset(&rqst, 0, sizeof(struct smb_rqst));
3585 rqst.rq_iov = iov;
3586 rqst.rq_nvec = 2;
3587
3588 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 3589 cifs_small_buf_release(req);
3590 rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
e5d04887 3591
d324f08d 3592 if (rc) {
31473fc4 3593 if (rc == -ENODATA &&
49f466bd 3594 rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
52755808
PS		 3595 srch_inf->endOfSearch = true;
3596 rc = 0;
3597 }
d324f08d
PS		 3598 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
3599 goto qdir_exit;
3600 }
d324f08d 3601
1fc6ad2f 3602 rc = validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
c1596ff5 3603 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
d324f08d
PS		 3604 info_buf_size);
3605 if (rc)
3606 goto qdir_exit;
3607
3608 srch_inf->unicode = true;
3609
3610 if (srch_inf->ntwrk_buf_start) {
3611 if (srch_inf->smallBuf)
3612 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
3613 else
3614 cifs_buf_release(srch_inf->ntwrk_buf_start);
3615 }
3616 srch_inf->ntwrk_buf_start = (char *)rsp;
977b6170
RS		 3617 srch_inf->srch_entries_start = srch_inf->last_entry =
3618 (char *)rsp + le16_to_cpu(rsp->OutputBufferOffset);
3619 end_of_smb = rsp_iov.iov_len + (char *)rsp;
d324f08d
PS		 3620 srch_inf->entries_in_buffer =
3621 num_entries(srch_inf->srch_entries_start, end_of_smb,
3622 &srch_inf->last_entry, info_buf_size);
3623 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
f96637be
JP		 3624 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
3625 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
3626 srch_inf->srch_entries_start, srch_inf->last_entry);
d324f08d
PS		 3627 if (resp_buftype == CIFS_LARGE_BUFFER)
3628 srch_inf->smallBuf = false;
3629 else if (resp_buftype == CIFS_SMALL_BUFFER)
3630 srch_inf->smallBuf = true;
3631 else
f96637be 3632 cifs_dbg(VFS, "illegal search buffer type\n");
d324f08d 3633
d324f08d
PS		 3634 return rc;
3635
3636qdir_exit:
3637 free_rsp_buf(resp_buftype, rsp);
3638 return rc;
3639}
3640
35143eb5
PS		 3641static int
3642send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
dac95340
SP		 3643 u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
3644 u8 info_type, u32 additional_info, unsigned int num,
3645 void **data, unsigned int *size)
35143eb5 3646{
40eff45b 3647 struct smb_rqst rqst;
35143eb5
PS		 3648 struct smb2_set_info_req *req;
3649 struct smb2_set_info_rsp *rsp = NULL;
3650 struct kvec *iov;
da502f7d 3651 struct kvec rsp_iov;
35143eb5
PS		 3652 int rc = 0;
3653 int resp_buftype;
3654 unsigned int i;
35143eb5 3655 struct cifs_ses *ses = tcon->ses;
7fb8986e 3656 int flags = 0;
2fc803ef 3657 unsigned int total_len;
35143eb5 3658
68a6afa7 3659 if (!ses || !(ses->server))
35143eb5
PS		 3660 return -EIO;
3661
3662 if (!num)
3663 return -EINVAL;
3664
6da2ec56 3665 iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL);
35143eb5
PS		 3666 if (!iov)
3667 return -ENOMEM;
3668
2fc803ef 3669 rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, (void **) &req, &total_len);
35143eb5
PS		 3670 if (rc) {
3671 kfree(iov);
3672 return rc;
3673 }
3674
5a77e75f 3675 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3676 flags |= CIFS_TRANSFORM_REQ;
3677
2fc803ef 3678 req->sync_hdr.ProcessId = cpu_to_le32(pid);
c839ff24 3679
dac95340 3680 req->InfoType = info_type;
35143eb5
PS		 3681 req->FileInfoClass = info_class;
3682 req->PersistentFileId = persistent_fid;
3683 req->VolatileFileId = volatile_fid;
dac95340 3684 req->AdditionalInformation = cpu_to_le32(additional_info);
35143eb5 3685
35143eb5 3686 req->BufferOffset =
2fc803ef 3687 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1);
35143eb5
PS		 3688 req->BufferLength = cpu_to_le32(*size);
3689
35143eb5 3690 memcpy(req->Buffer, *data, *size);
2fc803ef 3691 total_len += *size;
35143eb5
PS		 3692
3693 iov[0].iov_base = (char *)req;
2fc803ef
RS		 3694 /* 1 for Buffer */
3695 iov[0].iov_len = total_len - 1;
35143eb5
PS		 3696
3697 for (i = 1; i < num; i++) {
35143eb5
PS		 3698 le32_add_cpu(&req->BufferLength, size[i]);
3699 iov[i].iov_base = (char *)data[i];
3700 iov[i].iov_len = size[i];
3701 }
3702
40eff45b
RS		 3703 memset(&rqst, 0, sizeof(struct smb_rqst));
3704 rqst.rq_iov = iov;
3705 rqst.rq_nvec = num;
3706
3707 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
2fc803ef 3708 &rsp_iov);
f46ecbd9 3709 cifs_buf_release(req);
da502f7d 3710 rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
35143eb5 3711
eccb4422 3712 if (rc != 0) {
35143eb5 3713 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
eccb4422
SF		 3714 trace_smb3_set_info_err(xid, persistent_fid, tcon->tid,
3715 ses->Suid, info_class, (__u32)info_type, rc);
3716 }
7d3fb24b 3717
35143eb5
PS		 3718 free_rsp_buf(resp_buftype, rsp);
3719 kfree(iov);
3720 return rc;
3721}
3722
3723int
3724SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
3725 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3726{
3727 struct smb2_file_rename_info info;
3728 void **data;
3729 unsigned int size[2];
3730 int rc;
3731 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3732
6da2ec56 3733 data = kmalloc_array(2, sizeof(void *), GFP_KERNEL);
35143eb5
PS		 3734 if (!data)
3735 return -ENOMEM;
3736
3737 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
3738 /* 0 = fail if target already exists */
3739 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3740 info.FileNameLength = cpu_to_le32(len);
3741
3742 data[0] = &info;
3743 size[0] = sizeof(struct smb2_file_rename_info);
3744
3745 data[1] = target_file;
3746 size[1] = len + 2 /* null */;
3747
3748 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3749 current->tgid, FILE_RENAME_INFORMATION, SMB2_O_INFO_FILE,
3750 0, 2, data, size);
35143eb5
PS		 3751 kfree(data);
3752 return rc;
3753}
568798cc 3754
897fba11
SF		 3755int
3756SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
3757 u64 persistent_fid, u64 volatile_fid)
3758{
3759 __u8 delete_pending = 1;
3760 void *data;
3761 unsigned int size;
3762
3763 data = &delete_pending;
3764 size = 1; /* sizeof __u8 */
3765
3766 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3767 current->tgid, FILE_DISPOSITION_INFORMATION, SMB2_O_INFO_FILE,
3768 0, 1, &data, &size);
897fba11
SF		 3769}
3770
568798cc
PS		 3771int
3772SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
3773 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3774{
3775 struct smb2_file_link_info info;
3776 void **data;
3777 unsigned int size[2];
3778 int rc;
3779 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3780
6da2ec56 3781 data = kmalloc_array(2, sizeof(void *), GFP_KERNEL);
568798cc
PS		 3782 if (!data)
3783 return -ENOMEM;
3784
3785 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
3786 /* 0 = fail if link already exists */
3787 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3788 info.FileNameLength = cpu_to_le32(len);
3789
3790 data[0] = &info;
3791 size[0] = sizeof(struct smb2_file_link_info);
3792
3793 data[1] = target_file;
3794 size[1] = len + 2 /* null */;
3795
3796 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3797 current->tgid, FILE_LINK_INFORMATION, SMB2_O_INFO_FILE,
3798 0, 2, data, size);
568798cc
PS		 3799 kfree(data);
3800 return rc;
3801}
c839ff24
PS		 3802
3803int
3804SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
f29ebb47 3805 u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc)
c839ff24
PS		 3806{
3807 struct smb2_file_eof_info info;
3808 void *data;
3809 unsigned int size;
3810
3811 info.EndOfFile = *eof;
3812
3813 data = &info;
3814 size = sizeof(struct smb2_file_eof_info);
3815
f29ebb47
SF		 3816 if (is_falloc)
3817 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3818 pid, FILE_ALLOCATION_INFORMATION, SMB2_O_INFO_FILE,
3819 0, 1, &data, &size);
f29ebb47
SF		 3820 else
3821 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3822 pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE,
3823 0, 1, &data, &size);
c839ff24 3824}
1feeaac7
PS		 3825
3826int
3827SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
3828 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
3829{
3830 unsigned int size;
3831 size = sizeof(FILE_BASIC_INFO);
3832 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3833 current->tgid, FILE_BASIC_INFORMATION, SMB2_O_INFO_FILE,
3834 0, 1, (void **)&buf, &size);
3835}
3836
3837int
3838SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
3839 u64 persistent_fid, u64 volatile_fid,
3840 struct cifs_ntsd *pnntsd, int pacllen, int aclflag)
3841{
3842 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3843 current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag,
3844 1, (void **)&pnntsd, &pacllen);
1feeaac7 3845}
983c88a4 3846
5517554e
RS		 3847int
3848SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
3849 u64 persistent_fid, u64 volatile_fid,
3850 struct smb2_file_full_ea_info *buf, int len)
3851{
3852 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3853 current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE,
3854 0, 1, (void **)&buf, &len);
3855}
3856
983c88a4
PS		 3857int
3858SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
3859 const u64 persistent_fid, const u64 volatile_fid,
3860 __u8 oplock_level)
3861{
40eff45b 3862 struct smb_rqst rqst;
983c88a4 3863 int rc;
0d5a288d 3864 struct smb2_oplock_break *req = NULL;
21ad9487 3865 struct cifs_ses *ses = tcon->ses;
7fb8986e 3866 int flags = CIFS_OBREAK_OP;
21ad9487
RS		 3867 unsigned int total_len;
3868 struct kvec iov[1];
3869 struct kvec rsp_iov;
3870 int resp_buf_type;
983c88a4 3871
f96637be 3872 cifs_dbg(FYI, "SMB2_oplock_break\n");
21ad9487
RS		 3873 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
3874 &total_len);
983c88a4
PS		 3875 if (rc)
3876 return rc;
3877
5a77e75f 3878 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3879 flags |= CIFS_TRANSFORM_REQ;
3880
983c88a4
PS		 3881 req->VolatileFid = volatile_fid;
3882 req->PersistentFid = persistent_fid;
3883 req->OplockLevel = oplock_level;
21ad9487 3884 req->sync_hdr.CreditRequest = cpu_to_le16(1);
983c88a4 3885
21ad9487
RS		 3886 flags |= CIFS_NO_RESP;
3887
3888 iov[0].iov_base = (char *)req;
3889 iov[0].iov_len = total_len;
3890
40eff45b
RS		 3891 memset(&rqst, 0, sizeof(struct smb_rqst));
3892 rqst.rq_iov = iov;
3893 rqst.rq_nvec = 1;
3894
3895 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
da502f7d 3896 cifs_small_buf_release(req);
983c88a4
PS		 3897
3898 if (rc) {
3899 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 3900 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
983c88a4
PS		 3901 }
3902
3903 return rc;
3904}
6fc05c25
PS		 3905
3906static void
3907copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
3908 struct kstatfs *kst)
3909{
3910 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
3911 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
3912 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
42bec214
SP		 3913 kst->f_bfree = kst->f_bavail =
3914 le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
6fc05c25
PS		 3915 return;
3916}
3917
2d304217
SF		 3918static void
3919copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO *response_data,
3920 struct kstatfs *kst)
3921{
3922 kst->f_bsize = le32_to_cpu(response_data->BlockSize);
3923 kst->f_blocks = le64_to_cpu(response_data->TotalBlocks);
3924 kst->f_bfree = le64_to_cpu(response_data->BlocksAvail);
3925 if (response_data->UserBlocksAvail == cpu_to_le64(-1))
3926 kst->f_bavail = kst->f_bfree;
3927 else
3928 kst->f_bavail = le64_to_cpu(response_data->UserBlocksAvail);
3929 if (response_data->TotalFileNodes != cpu_to_le64(-1))
3930 kst->f_files = le64_to_cpu(response_data->TotalFileNodes);
3931 if (response_data->FreeFileNodes != cpu_to_le64(-1))
3932 kst->f_ffree = le64_to_cpu(response_data->FreeFileNodes);
3933
3934 return;
3935}
2d304217 3936
6fc05c25
PS		 3937static int
3938build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
3939 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
3940{
c0953f2e 3941 struct TCP_Server_Info *server;
6fc05c25
PS		 3942 int rc;
3943 struct smb2_query_info_req *req;
b2fb7fec 3944 unsigned int total_len;
6fc05c25 3945
f96637be 3946 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
6fc05c25
PS		 3947
3948 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
3949 return -EIO;
3950
c0953f2e
GS		 3951 server = tcon->ses->server;
3952
b2fb7fec
RS		 3953 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
3954 &total_len);
6fc05c25
PS		 3955 if (rc)
3956 return rc;
3957
3958 req->InfoType = SMB2_O_INFO_FILESYSTEM;
3959 req->FileInfoClass = level;
3960 req->PersistentFileId = persistent_fid;
3961 req->VolatileFileId = volatile_fid;
b2fb7fec 3962 /* 1 for pad */
6fc05c25 3963 req->InputBufferOffset =
b2fb7fec 3964 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1);
6fc05c25 3965 req->OutputBufferLength = cpu_to_le32(
1fc6ad2f 3966 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1);
6fc05c25
PS		 3967
3968 iov->iov_base = (char *)req;
b2fb7fec 3969 iov->iov_len = total_len;
6fc05c25
PS		 3970 return 0;
3971}
3972
2d304217
SF		 3973int
3974SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon,
3975 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
3976{
3977 struct smb_rqst rqst;
3978 struct smb2_query_info_rsp *rsp = NULL;
3979 struct kvec iov;
3980 struct kvec rsp_iov;
3981 int rc = 0;
3982 int resp_buftype;
3983 struct cifs_ses *ses = tcon->ses;
3984 FILE_SYSTEM_POSIX_INFO *info = NULL;
3985 int flags = 0;
3986
3987 rc = build_qfs_info_req(&iov, tcon, FS_POSIX_INFORMATION,
3988 sizeof(FILE_SYSTEM_POSIX_INFO),
3989 persistent_fid, volatile_fid);
3990 if (rc)
3991 return rc;
3992
3993 if (smb3_encryption_required(tcon))
3994 flags |= CIFS_TRANSFORM_REQ;
3995
3996 memset(&rqst, 0, sizeof(struct smb_rqst));
3997 rqst.rq_iov = &iov;
3998 rqst.rq_nvec = 1;
3999
4000 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
4001 cifs_small_buf_release(iov.iov_base);
4002 if (rc) {
4003 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
4004 goto posix_qfsinf_exit;
4005 }
4006 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
4007
4008 info = (FILE_SYSTEM_POSIX_INFO *)(
4009 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
4010 rc = validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
4011 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
4012 sizeof(FILE_SYSTEM_POSIX_INFO));
4013 if (!rc)
4014 copy_posix_fs_info_to_kstatfs(info, fsdata);
4015
4016posix_qfsinf_exit:
4017 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
4018 return rc;
4019}
2d304217 4020
6fc05c25
PS		 4021int
4022SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
4023 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
4024{
40eff45b 4025 struct smb_rqst rqst;
6fc05c25
PS		 4026 struct smb2_query_info_rsp *rsp = NULL;
4027 struct kvec iov;
da502f7d 4028 struct kvec rsp_iov;
6fc05c25
PS		 4029 int rc = 0;
4030 int resp_buftype;
4031 struct cifs_ses *ses = tcon->ses;
4032 struct smb2_fs_full_size_info *info = NULL;
7fb8986e 4033 int flags = 0;
6fc05c25
PS		 4034
4035 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
4036 sizeof(struct smb2_fs_full_size_info),
4037 persistent_fid, volatile_fid);
4038 if (rc)
4039 return rc;
4040
5a77e75f 4041 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4042 flags |= CIFS_TRANSFORM_REQ;
4043
40eff45b
RS		 4044 memset(&rqst, 0, sizeof(struct smb_rqst));
4045 rqst.rq_iov = &iov;
4046 rqst.rq_nvec = 1;
4047
4048 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 4049 cifs_small_buf_release(iov.iov_base);
6fc05c25
PS		 4050 if (rc) {
4051 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
34f62640 4052 goto qfsinf_exit;
6fc05c25 4053 }
da502f7d 4054 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
6fc05c25 4055
1fc6ad2f 4056 info = (struct smb2_fs_full_size_info *)(
49f466bd 4057 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1fc6ad2f 4058 rc = validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
c1596ff5 4059 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
6fc05c25
PS		 4060 sizeof(struct smb2_fs_full_size_info));
4061 if (!rc)
4062 copy_fs_info_to_kstatfs(info, fsdata);
4063
34f62640 4064qfsinf_exit:
da502f7d 4065 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
34f62640
SF		 4066 return rc;
4067}
4068
4069int
4070SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2167114c 4071 u64 persistent_fid, u64 volatile_fid, int level)
34f62640 4072{
40eff45b 4073 struct smb_rqst rqst;
34f62640
SF		 4074 struct smb2_query_info_rsp *rsp = NULL;
4075 struct kvec iov;
da502f7d 4076 struct kvec rsp_iov;
34f62640 4077 int rc = 0;
2167114c 4078 int resp_buftype, max_len, min_len;
34f62640
SF		 4079 struct cifs_ses *ses = tcon->ses;
4080 unsigned int rsp_len, offset;
7fb8986e 4081 int flags = 0;
34f62640 4082
2167114c
SF		 4083 if (level == FS_DEVICE_INFORMATION) {
4084 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
4085 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
4086 } else if (level == FS_ATTRIBUTE_INFORMATION) {
4087 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
4088 min_len = MIN_FS_ATTR_INFO_SIZE;
af6a12ea
SF		 4089 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
4090 max_len = sizeof(struct smb3_fs_ss_info);
4091 min_len = sizeof(struct smb3_fs_ss_info);
21ba3845
SF		 4092 } else if (level == FS_VOLUME_INFORMATION) {
4093 max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN;
4094 min_len = sizeof(struct smb3_fs_vol_info);
2167114c 4095 } else {
af6a12ea 4096 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2167114c
SF		 4097 return -EINVAL;
4098 }
4099
4100 rc = build_qfs_info_req(&iov, tcon, level, max_len,
34f62640
SF		 4101 persistent_fid, volatile_fid);
4102 if (rc)
4103 return rc;
4104
5a77e75f 4105 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4106 flags |= CIFS_TRANSFORM_REQ;
4107
40eff45b
RS		 4108 memset(&rqst, 0, sizeof(struct smb_rqst));
4109 rqst.rq_iov = &iov;
4110 rqst.rq_nvec = 1;
4111
4112 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 4113 cifs_small_buf_release(iov.iov_base);
34f62640
SF		 4114 if (rc) {
4115 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
4116 goto qfsattr_exit;
4117 }
da502f7d 4118 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
34f62640
SF		 4119
4120 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
4121 offset = le16_to_cpu(rsp->OutputBufferOffset);
1fc6ad2f 4122 rc = validate_iov(offset, rsp_len, &rsp_iov, min_len);
2167114c
SF		 4123 if (rc)
4124 goto qfsattr_exit;
4125
4126 if (level == FS_ATTRIBUTE_INFORMATION)
1fc6ad2f 4127 memcpy(&tcon->fsAttrInfo, offset
49f466bd 4128 + (char *)rsp, min_t(unsigned int,
2167114c
SF		 4129 rsp_len, max_len));
4130 else if (level == FS_DEVICE_INFORMATION)
1fc6ad2f 4131 memcpy(&tcon->fsDevInfo, offset
49f466bd 4132 + (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO));
af6a12ea
SF		 4133 else if (level == FS_SECTOR_SIZE_INFORMATION) {
4134 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
1fc6ad2f 4135 (offset + (char *)rsp);
af6a12ea
SF		 4136 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
4137 tcon->perf_sector_size =
4138 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
21ba3845
SF		 4139 } else if (level == FS_VOLUME_INFORMATION) {
4140 struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *)
4141 (offset + (char *)rsp);
4142 tcon->vol_serial_number = vol_info->VolumeSerialNumber;
4143 tcon->vol_create_time = vol_info->VolumeCreationTime;
af6a12ea 4144 }
34f62640
SF		 4145
4146qfsattr_exit:
da502f7d 4147 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
6fc05c25
PS		 4148 return rc;
4149}
f7ba7fe6
PS		 4150
4151int
4152smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
4153 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
4154 const __u32 num_lock, struct smb2_lock_element *buf)
4155{
40eff45b 4156 struct smb_rqst rqst;
f7ba7fe6
PS		 4157 int rc = 0;
4158 struct smb2_lock_req *req = NULL;
4159 struct kvec iov[2];
da502f7d 4160 struct kvec rsp_iov;
f7ba7fe6
PS		 4161 int resp_buf_type;
4162 unsigned int count;
7fb8986e 4163 int flags = CIFS_NO_RESP;
ced93679 4164 unsigned int total_len;
f7ba7fe6 4165
f96637be 4166 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
f7ba7fe6 4167
ced93679 4168 rc = smb2_plain_req_init(SMB2_LOCK, tcon, (void **) &req, &total_len);
f7ba7fe6
PS		 4169 if (rc)
4170 return rc;
4171
5a77e75f 4172 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4173 flags |= CIFS_TRANSFORM_REQ;
4174
ced93679 4175 req->sync_hdr.ProcessId = cpu_to_le32(pid);
f7ba7fe6
PS		 4176 req->LockCount = cpu_to_le16(num_lock);
4177
4178 req->PersistentFileId = persist_fid;
4179 req->VolatileFileId = volatile_fid;
4180
4181 count = num_lock * sizeof(struct smb2_lock_element);
f7ba7fe6
PS		 4182
4183 iov[0].iov_base = (char *)req;
ced93679 4184 iov[0].iov_len = total_len - sizeof(struct smb2_lock_element);
f7ba7fe6
PS		 4185 iov[1].iov_base = (char *)buf;
4186 iov[1].iov_len = count;
4187
4188 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
40eff45b
RS		 4189
4190 memset(&rqst, 0, sizeof(struct smb_rqst));
4191 rqst.rq_iov = iov;
4192 rqst.rq_nvec = 2;
4193
4194 rc = cifs_send_recv(xid, tcon->ses, &rqst, &resp_buf_type, flags,
ced93679 4195 &rsp_iov);
da502f7d 4196 cifs_small_buf_release(req);
f7ba7fe6 4197 if (rc) {
f96637be 4198 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
f7ba7fe6 4199 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
eccb4422
SF		 4200 trace_smb3_lock_err(xid, persist_fid, tcon->tid,
4201 tcon->ses->Suid, rc);
f7ba7fe6
PS		 4202 }
4203
4204 return rc;
4205}
4206
4207int
4208SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
4209 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
4210 const __u64 length, const __u64 offset, const __u32 lock_flags,
4211 const bool wait)
4212{
4213 struct smb2_lock_element lock;
4214
4215 lock.Offset = cpu_to_le64(offset);
4216 lock.Length = cpu_to_le64(length);
4217 lock.Flags = cpu_to_le32(lock_flags);
4218 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
4219 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
4220
4221 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
4222}
0822f514
PS		 4223
4224int
4225SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
4226 __u8 *lease_key, const __le32 lease_state)
4227{
40eff45b 4228 struct smb_rqst rqst;
0822f514
PS		 4229 int rc;
4230 struct smb2_lease_ack *req = NULL;
8eb7998e 4231 struct cifs_ses *ses = tcon->ses;
7fb8986e 4232 int flags = CIFS_OBREAK_OP;
8eb7998e
RS		 4233 unsigned int total_len;
4234 struct kvec iov[1];
4235 struct kvec rsp_iov;
4236 int resp_buf_type;
0822f514 4237
f96637be 4238 cifs_dbg(FYI, "SMB2_lease_break\n");
8eb7998e
RS		 4239 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
4240 &total_len);
0822f514
PS		 4241 if (rc)
4242 return rc;
4243
5a77e75f 4244 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4245 flags |= CIFS_TRANSFORM_REQ;
4246
8eb7998e 4247 req->sync_hdr.CreditRequest = cpu_to_le16(1);
0822f514 4248 req->StructureSize = cpu_to_le16(36);
8eb7998e 4249 total_len += 12;
0822f514
PS		 4250
4251 memcpy(req->LeaseKey, lease_key, 16);
4252 req->LeaseState = lease_state;
4253
8eb7998e
RS		 4254 flags |= CIFS_NO_RESP;
4255
4256 iov[0].iov_base = (char *)req;
4257 iov[0].iov_len = total_len;
4258
40eff45b
RS		 4259 memset(&rqst, 0, sizeof(struct smb_rqst));
4260 rqst.rq_iov = iov;
4261 rqst.rq_nvec = 1;
4262
4263 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
da502f7d 4264 cifs_small_buf_release(req);
0822f514
PS		 4265
4266 if (rc) {
4267 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 4268 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
0822f514
PS		 4269 }
4270
4271 return rc;
4272}
Linux 6.x block layer and io_uring tree(s)