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cifs: minor clarification in comments
[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
730928c8 83int 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
cdeaf9d0
SF		 1859/* See MS-SMB2 2.2.13.2.7 */
1860static struct crt_twarp_ctxt *
1861create_twarp_buf(__u64 timewarp)
1862{
1863 struct crt_twarp_ctxt *buf;
1864
1865 buf = kzalloc(sizeof(struct crt_twarp_ctxt), GFP_KERNEL);
1866 if (!buf)
1867 return NULL;
1868
1869 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1870 (struct crt_twarp_ctxt, Timestamp));
1871 buf->ccontext.DataLength = cpu_to_le32(8);
1872 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1873 (struct crt_twarp_ctxt, Name));
1874 buf->ccontext.NameLength = cpu_to_le16(4);
1875 /* SMB2_CREATE_TIMEWARP_TOKEN is "TWrp" */
1876 buf->Name[0] = 'T';
1877 buf->Name[1] = 'W';
1878 buf->Name[2] = 'r';
1879 buf->Name[3] = 'p';
1880 buf->Timestamp = cpu_to_le64(timewarp);
1881 return buf;
1882}
1883
1884/* See MS-SMB2 2.2.13.2.7 */
1885static int
1886add_twarp_context(struct kvec *iov, unsigned int *num_iovec, __u64 timewarp)
1887{
1888 struct smb2_create_req *req = iov[0].iov_base;
1889 unsigned int num = *num_iovec;
1890
1891 iov[num].iov_base = create_twarp_buf(timewarp);
1892 if (iov[num].iov_base == NULL)
1893 return -ENOMEM;
1894 iov[num].iov_len = sizeof(struct crt_twarp_ctxt);
1895 if (!req->CreateContextsOffset)
1896 req->CreateContextsOffset = cpu_to_le32(
1897 sizeof(struct smb2_create_req) +
1898 iov[num - 1].iov_len);
1899 le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_twarp_ctxt));
1900 *num_iovec = num + 1;
1901 return 0;
1902}
1903
f0712928
AA		 1904static int
1905alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
1906 const char *treename, const __le16 *path)
1907{
1908 int treename_len, path_len;
1909 struct nls_table *cp;
1910 const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
1911
1912 /*
1913 * skip leading "\\"
1914 */
1915 treename_len = strlen(treename);
1916 if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\'))
1917 return -EINVAL;
1918
1919 treename += 2;
1920 treename_len -= 2;
1921
1922 path_len = UniStrnlen((wchar_t *)path, PATH_MAX);
1923
1924 /*
1925 * make room for one path separator between the treename and
1926 * path
1927 */
1928 *out_len = treename_len + 1 + path_len;
1929
1930 /*
1931 * final path needs to be null-terminated UTF16 with a
1932 * size aligned to 8
1933 */
1934
1935 *out_size = roundup((*out_len+1)*2, 8);
1936 *out_path = kzalloc(*out_size, GFP_KERNEL);
1937 if (!*out_path)
1938 return -ENOMEM;
1939
1940 cp = load_nls_default();
1941 cifs_strtoUTF16(*out_path, treename, treename_len, cp);
1942 UniStrcat(*out_path, sep);
1943 UniStrcat(*out_path, path);
1944 unload_nls(cp);
1945
1946 return 0;
1947}
1948
bea851b8
SF		 1949int smb311_posix_mkdir(const unsigned int xid, struct inode *inode,
1950 umode_t mode, struct cifs_tcon *tcon,
1951 const char *full_path,
1952 struct cifs_sb_info *cifs_sb)
1953{
1954 struct smb_rqst rqst;
1955 struct smb2_create_req *req;
256b4c3f 1956 struct smb2_create_rsp *rsp = NULL;
bea851b8
SF		 1957 struct TCP_Server_Info *server;
1958 struct cifs_ses *ses = tcon->ses;
1959 struct kvec iov[3]; /* make sure at least one for each open context */
1960 struct kvec rsp_iov = {NULL, 0};
1961 int resp_buftype;
1962 int uni_path_len;
1963 __le16 *copy_path = NULL;
1964 int copy_size;
1965 int rc = 0;
1966 unsigned int n_iov = 2;
1967 __u32 file_attributes = 0;
1968 char *pc_buf = NULL;
1969 int flags = 0;
1970 unsigned int total_len;
256b4c3f 1971 __le16 *utf16_path = NULL;
bea851b8
SF		 1972
1973 cifs_dbg(FYI, "mkdir\n");
1974
256b4c3f
AA		 1975 /* resource #1: path allocation */
1976 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1977 if (!utf16_path)
1978 return -ENOMEM;
1979
bea851b8
SF		 1980 if (ses && (ses->server))
1981 server = ses->server;
256b4c3f
AA		 1982 else {
1983 rc = -EIO;
1984 goto err_free_path;
1985 }
bea851b8 1986
256b4c3f 1987 /* resource #2: request */
bea851b8 1988 rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
bea851b8 1989 if (rc)
256b4c3f
AA		 1990 goto err_free_path;
1991
bea851b8
SF		 1992
1993 if (smb3_encryption_required(tcon))
1994 flags |= CIFS_TRANSFORM_REQ;
1995
bea851b8
SF		 1996 req->ImpersonationLevel = IL_IMPERSONATION;
1997 req->DesiredAccess = cpu_to_le32(FILE_WRITE_ATTRIBUTES);
1998 /* File attributes ignored on open (used in create though) */
1999 req->FileAttributes = cpu_to_le32(file_attributes);
2000 req->ShareAccess = FILE_SHARE_ALL_LE;
2001 req->CreateDisposition = cpu_to_le32(FILE_CREATE);
2002 req->CreateOptions = cpu_to_le32(CREATE_NOT_FILE);
2003
2004 iov[0].iov_base = (char *)req;
2005 /* -1 since last byte is buf[0] which is sent below (path) */
2006 iov[0].iov_len = total_len - 1;
2007
2008 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
2009
2010 /* [MS-SMB2] 2.2.13 NameOffset:
2011 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2012 * the SMB2 header, the file name includes a prefix that will
2013 * be processed during DFS name normalization as specified in
2014 * section 3.3.5.9. Otherwise, the file name is relative to
2015 * the share that is identified by the TreeId in the SMB2
2016 * header.
2017 */
2018 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
2019 int name_len;
2020
2021 req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
2022 rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
2023 &name_len,
256b4c3f
AA		 2024 tcon->treeName, utf16_path);
2025 if (rc)
2026 goto err_free_req;
2027
bea851b8
SF		 2028 req->NameLength = cpu_to_le16(name_len * 2);
2029 uni_path_len = copy_size;
256b4c3f
AA		 2030 /* free before overwriting resource */
2031 kfree(utf16_path);
2032 utf16_path = copy_path;
bea851b8 2033 } else {
256b4c3f 2034 uni_path_len = (2 * UniStrnlen((wchar_t *)utf16_path, PATH_MAX)) + 2;
bea851b8
SF		 2035 /* MUST set path len (NameLength) to 0 opening root of share */
2036 req->NameLength = cpu_to_le16(uni_path_len - 2);
2037 if (uni_path_len % 8 != 0) {
2038 copy_size = roundup(uni_path_len, 8);
2039 copy_path = kzalloc(copy_size, GFP_KERNEL);
2040 if (!copy_path) {
256b4c3f
AA		 2041 rc = -ENOMEM;
2042 goto err_free_req;
bea851b8 2043 }
256b4c3f 2044 memcpy((char *)copy_path, (const char *)utf16_path,
bea851b8
SF		 2045 uni_path_len);
2046 uni_path_len = copy_size;
256b4c3f
AA		 2047 /* free before overwriting resource */
2048 kfree(utf16_path);
2049 utf16_path = copy_path;
bea851b8
SF		 2050 }
2051 }
2052
2053 iov[1].iov_len = uni_path_len;
256b4c3f 2054 iov[1].iov_base = utf16_path;
bea851b8
SF		 2055 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2056
2057 if (tcon->posix_extensions) {
256b4c3f 2058 /* resource #3: posix buf */
bea851b8 2059 rc = add_posix_context(iov, &n_iov, mode);
256b4c3f
AA		 2060 if (rc)
2061 goto err_free_req;
bea851b8
SF		 2062 pc_buf = iov[n_iov-1].iov_base;
2063 }
2064
2065
2066 memset(&rqst, 0, sizeof(struct smb_rqst));
2067 rqst.rq_iov = iov;
2068 rqst.rq_nvec = n_iov;
2069
256b4c3f
AA		 2070 /* resource #4: response buffer */
2071 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
2072 if (rc) {
bea851b8
SF		 2073 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
2074 trace_smb3_posix_mkdir_err(xid, tcon->tid, ses->Suid,
256b4c3f
AA		 2075 CREATE_NOT_FILE,
2076 FILE_WRITE_ATTRIBUTES, rc);
2077 goto err_free_rsp_buf;
2078 }
2079
2080 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2081 trace_smb3_posix_mkdir_done(xid, rsp->PersistentFileId, tcon->tid,
2082 ses->Suid, CREATE_NOT_FILE,
2083 FILE_WRITE_ATTRIBUTES);
bea851b8
SF		 2084
2085 SMB2_close(xid, tcon, rsp->PersistentFileId, rsp->VolatileFileId);
2086
2087 /* Eventually save off posix specific response info and timestaps */
2088
256b4c3f 2089err_free_rsp_buf:
bea851b8 2090 free_rsp_buf(resp_buftype, rsp);
256b4c3f
AA		 2091 kfree(pc_buf);
2092err_free_req:
2093 cifs_small_buf_release(req);
2094err_free_path:
2095 kfree(utf16_path);
bea851b8 2096 return rc;
bea851b8 2097}
bea851b8 2098
2503a0db 2099int
1eb9fb52
RS		 2100SMB2_open_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, __u8 *oplock,
2101 struct cifs_open_parms *oparms, __le16 *path)
2503a0db 2102{
1eb9fb52 2103 struct TCP_Server_Info *server = tcon->ses->server;
2503a0db 2104 struct smb2_create_req *req;
da502f7d 2105 unsigned int n_iov = 2;
ca81983f 2106 __u32 file_attributes = 0;
1eb9fb52
RS		 2107 int copy_size;
2108 int uni_path_len;
4f33bc35 2109 unsigned int total_len;
1eb9fb52
RS		 2110 struct kvec *iov = rqst->rq_iov;
2111 __le16 *copy_path;
2112 int rc;
2503a0db 2113
4f33bc35 2114 rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
2503a0db
PS		 2115 if (rc)
2116 return rc;
2117
1eb9fb52
RS		 2118 iov[0].iov_base = (char *)req;
2119 /* -1 since last byte is buf[0] which is sent below (path) */
2120 iov[0].iov_len = total_len - 1;
7fb8986e 2121
064f6047 2122 if (oparms->create_options & CREATE_OPTION_READONLY)
ca81983f 2123 file_attributes |= ATTR_READONLY;
db8b631d
SF		 2124 if (oparms->create_options & CREATE_OPTION_SPECIAL)
2125 file_attributes |= ATTR_SYSTEM;
ca81983f 2126
2503a0db 2127 req->ImpersonationLevel = IL_IMPERSONATION;
064f6047 2128 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
2503a0db
PS		 2129 /* File attributes ignored on open (used in create though) */
2130 req->FileAttributes = cpu_to_le32(file_attributes);
2131 req->ShareAccess = FILE_SHARE_ALL_LE;
064f6047
PS		 2132 req->CreateDisposition = cpu_to_le32(oparms->disposition);
2133 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
4f33bc35 2134 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
f0712928
AA		 2135
2136 /* [MS-SMB2] 2.2.13 NameOffset:
2137 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2138 * the SMB2 header, the file name includes a prefix that will
2139 * be processed during DFS name normalization as specified in
2140 * section 3.3.5.9. Otherwise, the file name is relative to
2141 * the share that is identified by the TreeId in the SMB2
2142 * header.
2143 */
2144 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
2145 int name_len;
2146
4f33bc35 2147 req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
f0712928
AA		 2148 rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
2149 &name_len,
2150 tcon->treeName, path);
1eb9fb52 2151 if (rc)
f0712928
AA		 2152 return rc;
2153 req->NameLength = cpu_to_le16(name_len * 2);
59aa3718
PS		 2154 uni_path_len = copy_size;
2155 path = copy_path;
f0712928
AA		 2156 } else {
2157 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
2158 /* MUST set path len (NameLength) to 0 opening root of share */
2159 req->NameLength = cpu_to_le16(uni_path_len - 2);
1eb9fb52
RS		 2160 copy_size = uni_path_len;
2161 if (copy_size % 8 != 0)
2162 copy_size = roundup(copy_size, 8);
2163 copy_path = kzalloc(copy_size, GFP_KERNEL);
2164 if (!copy_path)
2165 return -ENOMEM;
2166 memcpy((char *)copy_path, (const char *)path,
2167 uni_path_len);
2168 uni_path_len = copy_size;
2169 path = copy_path;
2503a0db
PS		 2170 }
2171
59aa3718
PS		 2172 iov[1].iov_len = uni_path_len;
2173 iov[1].iov_base = path;
59aa3718 2174
b8c32dbb
PS		 2175 if (!server->oplocks)
2176 *oplock = SMB2_OPLOCK_LEVEL_NONE;
2177
a41a28bd 2178 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
b8c32dbb
PS		 2179 *oplock == SMB2_OPLOCK_LEVEL_NONE)
2180 req->RequestedOplockLevel = *oplock;
f8015683
SF		 2181 else if (!(server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING) &&
2182 (oparms->create_options & CREATE_NOT_FILE))
2183 req->RequestedOplockLevel = *oplock; /* no srv lease support */
b8c32dbb 2184 else {
729c0c9d
SB		 2185 rc = add_lease_context(server, iov, &n_iov,
2186 oparms->fid->lease_key, oplock);
1eb9fb52 2187 if (rc)
d22cbfec 2188 return rc;
b8c32dbb
PS		 2189 }
2190
63eb3def
PS		 2191 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
2192 /* need to set Next field of lease context if we request it */
a41a28bd 2193 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
63eb3def 2194 struct create_context *ccontext =
da502f7d 2195 (struct create_context *)iov[n_iov-1].iov_base;
1c46943f 2196 ccontext->Next =
a41a28bd 2197 cpu_to_le32(server->vals->create_lease_size);
63eb3def 2198 }
b56eae4d 2199
da502f7d 2200 rc = add_durable_context(iov, &n_iov, oparms,
b56eae4d 2201 tcon->use_persistent);
1eb9fb52 2202 if (rc)
63eb3def 2203 return rc;
63eb3def
PS		 2204 }
2205
ce558b0e
SF		 2206 if (tcon->posix_extensions) {
2207 if (n_iov > 2) {
2208 struct create_context *ccontext =
2209 (struct create_context *)iov[n_iov-1].iov_base;
2210 ccontext->Next =
2211 cpu_to_le32(iov[n_iov-1].iov_len);
2212 }
2213
2214 rc = add_posix_context(iov, &n_iov, oparms->mode);
1eb9fb52 2215 if (rc)
ce558b0e 2216 return rc;
ce558b0e 2217 }
ce558b0e 2218
cdeaf9d0
SF		 2219 if (tcon->snapshot_time) {
2220 cifs_dbg(FYI, "adding snapshot context\n");
2221 if (n_iov > 2) {
2222 struct create_context *ccontext =
2223 (struct create_context *)iov[n_iov-1].iov_base;
2224 ccontext->Next =
2225 cpu_to_le32(iov[n_iov-1].iov_len);
2226 }
2227
2228 rc = add_twarp_context(iov, &n_iov, tcon->snapshot_time);
2229 if (rc)
2230 return rc;
2231 }
2232
2233
1eb9fb52
RS		 2234 rqst->rq_nvec = n_iov;
2235 return 0;
2236}
2237
2238/* rq_iov[0] is the request and is released by cifs_small_buf_release().
2239 * All other vectors are freed by kfree().
2240 */
2241void
2242SMB2_open_free(struct smb_rqst *rqst)
2243{
2244 int i;
2245
2246 cifs_small_buf_release(rqst->rq_iov[0].iov_base);
2247 for (i = 1; i < rqst->rq_nvec; i++)
730928c8
RS		 2248 if (rqst->rq_iov[i].iov_base != smb2_padding)
2249 kfree(rqst->rq_iov[i].iov_base);
1eb9fb52
RS		 2250}
2251
2252int
2253SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
2254 __u8 *oplock, struct smb2_file_all_info *buf,
2255 struct kvec *err_iov, int *buftype)
2256{
2257 struct smb_rqst rqst;
2258 struct smb2_create_rsp *rsp = NULL;
2259 struct TCP_Server_Info *server;
2260 struct cifs_tcon *tcon = oparms->tcon;
2261 struct cifs_ses *ses = tcon->ses;
4d8dfafc 2262 struct kvec iov[SMB2_CREATE_IOV_SIZE];
1eb9fb52 2263 struct kvec rsp_iov = {NULL, 0};
ef2298a0 2264 int resp_buftype = CIFS_NO_BUFFER;
1eb9fb52
RS		 2265 int rc = 0;
2266 int flags = 0;
2267
2268 cifs_dbg(FYI, "create/open\n");
2269 if (ses && (ses->server))
2270 server = ses->server;
2271 else
2272 return -EIO;
2273
2274 if (smb3_encryption_required(tcon))
2275 flags |= CIFS_TRANSFORM_REQ;
2276
40eff45b 2277 memset(&rqst, 0, sizeof(struct smb_rqst));
1eb9fb52 2278 memset(&iov, 0, sizeof(iov));
40eff45b 2279 rqst.rq_iov = iov;
4d8dfafc 2280 rqst.rq_nvec = SMB2_CREATE_IOV_SIZE;
1eb9fb52
RS		 2281
2282 rc = SMB2_open_init(tcon, &rqst, oplock, oparms, path);
2283 if (rc)
2284 goto creat_exit;
40eff45b
RS		 2285
2286 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
4f33bc35 2287 &rsp_iov);
da502f7d 2288 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2503a0db
PS		 2289
2290 if (rc != 0) {
2291 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
91cb74f5
RS		 2292 if (err_iov && rsp) {
2293 *err_iov = rsp_iov;
9d874c36 2294 *buftype = resp_buftype;
91cb74f5
RS		 2295 resp_buftype = CIFS_NO_BUFFER;
2296 rsp = NULL;
2297 }
28d59363
SF		 2298 trace_smb3_open_err(xid, tcon->tid, ses->Suid,
2299 oparms->create_options, oparms->desired_access, rc);
2503a0db 2300 goto creat_exit;
28d59363
SF		 2301 } else
2302 trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid,
2303 ses->Suid, oparms->create_options,
2304 oparms->desired_access);
2503a0db 2305
064f6047
PS		 2306 oparms->fid->persistent_fid = rsp->PersistentFileId;
2307 oparms->fid->volatile_fid = rsp->VolatileFileId;
f0df737e
PS		 2308
2309 if (buf) {
2310 memcpy(buf, &rsp->CreationTime, 32);
2311 buf->AllocationSize = rsp->AllocationSize;
2312 buf->EndOfFile = rsp->EndofFile;
2313 buf->Attributes = rsp->FileAttributes;
2314 buf->NumberOfLinks = cpu_to_le32(1);
2315 buf->DeletePending = 0;
2316 }
2e44b288 2317
b8c32dbb 2318 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
96164ab2
RS		 2319 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch,
2320 oparms->fid->lease_key);
b8c32dbb
PS		 2321 else
2322 *oplock = rsp->OplockLevel;
2503a0db 2323creat_exit:
1eb9fb52 2324 SMB2_open_free(&rqst);
2503a0db
PS		 2325 free_rsp_buf(resp_buftype, rsp);
2326 return rc;
2327}
2328
4a72dafa
SF		 2329/*
2330 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
2331 */
2332int
2333SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
63a83b86 2334 u64 volatile_fid, u32 opcode, bool is_fsctl,
51146625
AA		 2335 char *in_data, u32 indatalen,
2336 char **out_data, u32 *plen /* returned data len */)
4a72dafa 2337{
40eff45b 2338 struct smb_rqst rqst;
4a72dafa
SF		 2339 struct smb2_ioctl_req *req;
2340 struct smb2_ioctl_rsp *rsp;
8e353106 2341 struct cifs_ses *ses;
4a72dafa 2342 struct kvec iov[2];
da502f7d 2343 struct kvec rsp_iov;
4a72dafa 2344 int resp_buftype;
da502f7d 2345 int n_iov;
4a72dafa 2346 int rc = 0;
7fb8986e 2347 int flags = 0;
97754680 2348 unsigned int total_len;
4a72dafa
SF		 2349
2350 cifs_dbg(FYI, "SMB2 IOCTL\n");
2351
3d1a3745
SF		 2352 if (out_data != NULL)
2353 *out_data = NULL;
2354
4a72dafa
SF		 2355 /* zero out returned data len, in case of error */
2356 if (plen)
2357 *plen = 0;
2358
8e353106
SF		 2359 if (tcon)
2360 ses = tcon->ses;
2361 else
2362 return -EIO;
2363
68a6afa7 2364 if (!ses || !(ses->server))
4a72dafa
SF		 2365 return -EIO;
2366
97754680 2367 rc = smb2_plain_req_init(SMB2_IOCTL, tcon, (void **) &req, &total_len);
4a72dafa
SF		 2368 if (rc)
2369 return rc;
2370
5a77e75f 2371 if (smb3_encryption_required(tcon))
7fb8986e
PS		 2372 flags |= CIFS_TRANSFORM_REQ;
2373
4a72dafa
SF		 2374 req->CtlCode = cpu_to_le32(opcode);
2375 req->PersistentFileId = persistent_fid;
2376 req->VolatileFileId = volatile_fid;
2377
2378 if (indatalen) {
2379 req->InputCount = cpu_to_le32(indatalen);
2380 /* do not set InputOffset if no input data */
2381 req->InputOffset =
97754680 2382 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer));
4a72dafa
SF		 2383 iov[1].iov_base = in_data;
2384 iov[1].iov_len = indatalen;
da502f7d 2385 n_iov = 2;
4a72dafa 2386 } else
da502f7d 2387 n_iov = 1;
4a72dafa
SF		 2388
2389 req->OutputOffset = 0;
2390 req->OutputCount = 0; /* MBZ */
2391
2392 /*
2393 * Could increase MaxOutputResponse, but that would require more
2394 * than one credit. Windows typically sets this smaller, but for some
2395 * ioctls it may be useful to allow server to send more. No point
2396 * limiting what the server can send as long as fits in one credit
7db0a6ef
SF		 2397 * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE
2398 * (by default, note that it can be overridden to make max larger)
2399 * in responses (except for read responses which can be bigger.
2400 * We may want to bump this limit up
4a72dafa 2401 */
7db0a6ef 2402 req->MaxOutputResponse = cpu_to_le32(CIFSMaxBufSize);
4a72dafa
SF		 2403
2404 if (is_fsctl)
2405 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
2406 else
2407 req->Flags = 0;
2408
2409 iov[0].iov_base = (char *)req;
4a72dafa 2410
7ff8d45c
SF		 2411 /*
2412 * If no input data, the size of ioctl struct in
2413 * protocol spec still includes a 1 byte data buffer,
2414 * but if input data passed to ioctl, we do not
2415 * want to double count this, so we do not send
2416 * the dummy one byte of data in iovec[0] if sending
97754680 2417 * input data (in iovec[1]).
7ff8d45c
SF		 2418 */
2419
2420 if (indatalen) {
97754680 2421 iov[0].iov_len = total_len - 1;
7ff8d45c 2422 } else
97754680 2423 iov[0].iov_len = total_len;
7ff8d45c 2424
4587eee0
SF		 2425 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
2426 if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO)
97754680 2427 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
4a72dafa 2428
40eff45b
RS		 2429 memset(&rqst, 0, sizeof(struct smb_rqst));
2430 rqst.rq_iov = iov;
2431 rqst.rq_nvec = n_iov;
2432
2433 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
97754680 2434 &rsp_iov);
da502f7d
PS		 2435 cifs_small_buf_release(req);
2436 rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
4a72dafa 2437
eccb4422
SF		 2438 if (rc != 0)
2439 trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid,
2440 ses->Suid, 0, opcode, rc);
2441
9bf0c9cd 2442 if ((rc != 0) && (rc != -EINVAL)) {
8e353106 2443 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
4a72dafa 2444 goto ioctl_exit;
9bf0c9cd
SF		 2445 } else if (rc == -EINVAL) {
2446 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
2447 (opcode != FSCTL_SRV_COPYCHUNK)) {
8e353106 2448 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
9bf0c9cd
SF		 2449 goto ioctl_exit;
2450 }
4a72dafa
SF		 2451 }
2452
2453 /* check if caller wants to look at return data or just return rc */
2454 if ((plen == NULL) || (out_data == NULL))
2455 goto ioctl_exit;
2456
2457 *plen = le32_to_cpu(rsp->OutputCount);
2458
2459 /* We check for obvious errors in the output buffer length and offset */
2460 if (*plen == 0)
2461 goto ioctl_exit; /* server returned no data */
2d204ee9 2462 else if (*plen > rsp_iov.iov_len || *plen > 0xFF00) {
4a72dafa
SF		 2463 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
2464 *plen = 0;
2465 rc = -EIO;
2466 goto ioctl_exit;
2467 }
2468
2d204ee9 2469 if (rsp_iov.iov_len - *plen < le32_to_cpu(rsp->OutputOffset)) {
4a72dafa
SF		 2470 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
2471 le32_to_cpu(rsp->OutputOffset));
2472 *plen = 0;
2473 rc = -EIO;
2474 goto ioctl_exit;
2475 }
2476
d034feeb
Y		 2477 *out_data = kmemdup((char *)rsp + le32_to_cpu(rsp->OutputOffset),
2478 *plen, GFP_KERNEL);
4a72dafa
SF		 2479 if (*out_data == NULL) {
2480 rc = -ENOMEM;
2481 goto ioctl_exit;
2482 }
2483
4a72dafa
SF		 2484ioctl_exit:
2485 free_rsp_buf(resp_buftype, rsp);
2486 return rc;
2487}
2488
64a5cfa6
SF		 2489/*
2490 * Individual callers to ioctl worker function follow
2491 */
2492
2493int
2494SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2495 u64 persistent_fid, u64 volatile_fid)
2496{
2497 int rc;
64a5cfa6
SF		 2498 struct compress_ioctl fsctl_input;
2499 char *ret_data = NULL;
2500
2501 fsctl_input.CompressionState =
bc09d141 2502 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
64a5cfa6
SF		 2503
2504 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
2505 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
2506 (char *)&fsctl_input /* data input */,
2507 2 /* in data len */, &ret_data /* out data */, NULL);
2508
2509 cifs_dbg(FYI, "set compression rc %d\n", rc);
64a5cfa6
SF		 2510
2511 return rc;
2512}
2513
8eb4ecfa
RS		 2514int
2515SMB2_close_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
2516 u64 persistent_fid, u64 volatile_fid)
2517{
2518 struct smb2_close_req *req;
2519 struct kvec *iov = rqst->rq_iov;
2520 unsigned int total_len;
2521 int rc;
2522
2523 rc = smb2_plain_req_init(SMB2_CLOSE, tcon, (void **) &req, &total_len);
2524 if (rc)
2525 return rc;
2526
2527 req->PersistentFileId = persistent_fid;
2528 req->VolatileFileId = volatile_fid;
2529 iov[0].iov_base = (char *)req;
2530 iov[0].iov_len = total_len;
2531
2532 return 0;
2533}
2534
2535void
2536SMB2_close_free(struct smb_rqst *rqst)
2537{
2538 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
2539}
2540
2503a0db 2541int
97ca1762
RS		 2542SMB2_close_flags(const unsigned int xid, struct cifs_tcon *tcon,
2543 u64 persistent_fid, u64 volatile_fid, int flags)
2503a0db 2544{
40eff45b 2545 struct smb_rqst rqst;
8eb4ecfa 2546 struct smb2_close_rsp *rsp = NULL;
2503a0db
PS		 2547 struct cifs_ses *ses = tcon->ses;
2548 struct kvec iov[1];
da502f7d 2549 struct kvec rsp_iov;
ef2298a0 2550 int resp_buftype = CIFS_NO_BUFFER;
2503a0db
PS		 2551 int rc = 0;
2552
f96637be 2553 cifs_dbg(FYI, "Close\n");
2503a0db 2554
68a6afa7 2555 if (!ses || !(ses->server))
2503a0db
PS		 2556 return -EIO;
2557
5a77e75f 2558 if (smb3_encryption_required(tcon))
7fb8986e
PS		 2559 flags |= CIFS_TRANSFORM_REQ;
2560
40eff45b 2561 memset(&rqst, 0, sizeof(struct smb_rqst));
8eb4ecfa 2562 memset(&iov, 0, sizeof(iov));
40eff45b
RS		 2563 rqst.rq_iov = iov;
2564 rqst.rq_nvec = 1;
2565
8eb4ecfa
RS		 2566 rc = SMB2_close_init(tcon, &rqst, persistent_fid, volatile_fid);
2567 if (rc)
2568 goto close_exit;
2569
40eff45b 2570 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 2571 rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
2503a0db
PS		 2572
2573 if (rc != 0) {
d4a029d2 2574 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
eccb4422
SF		 2575 trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid,
2576 rc);
2503a0db
PS		 2577 goto close_exit;
2578 }
2579
2503a0db
PS		 2580 /* BB FIXME - decode close response, update inode for caching */
2581
2582close_exit:
8eb4ecfa 2583 SMB2_close_free(&rqst);
2503a0db
PS		 2584 free_rsp_buf(resp_buftype, rsp);
2585 return rc;
2586}
be4cb9e3 2587
97ca1762
RS		 2588int
2589SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
2590 u64 persistent_fid, u64 volatile_fid)
2591{
2592 return SMB2_close_flags(xid, tcon, persistent_fid, volatile_fid, 0);
2593}
2594
730928c8
RS		 2595int
2596smb2_validate_iov(unsigned int offset, unsigned int buffer_length,
2597 struct kvec *iov, unsigned int min_buf_size)
be4cb9e3 2598{
c1596ff5 2599 unsigned int smb_len = iov->iov_len;
1fc6ad2f
RS		 2600 char *end_of_smb = smb_len + (char *)iov->iov_base;
2601 char *begin_of_buf = offset + (char *)iov->iov_base;
be4cb9e3
PS		 2602 char *end_of_buf = begin_of_buf + buffer_length;
2603
2604
2605 if (buffer_length < min_buf_size) {
f96637be
JP		 2606 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
2607 buffer_length, min_buf_size);
be4cb9e3
PS		 2608 return -EINVAL;
2609 }
2610
2611 /* check if beyond RFC1001 maximum length */
2612 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
f96637be
JP		 2613 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
2614 buffer_length, smb_len);
be4cb9e3
PS		 2615 return -EINVAL;
2616 }
2617
2618 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
f96637be 2619 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
be4cb9e3
PS		 2620 return -EINVAL;
2621 }
2622
2623 return 0;
2624}
2625
2626/*
2627 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2628 * Caller must free buffer.
2629 */
c5a5f38f
RS		 2630int
2631smb2_validate_and_copy_iov(unsigned int offset, unsigned int buffer_length,
2632 struct kvec *iov, unsigned int minbufsize,
2633 char *data)
be4cb9e3 2634{
1fc6ad2f 2635 char *begin_of_buf = offset + (char *)iov->iov_base;
be4cb9e3
PS		 2636 int rc;
2637
2638 if (!data)
2639 return -EINVAL;
2640
730928c8 2641 rc = smb2_validate_iov(offset, buffer_length, iov, minbufsize);
be4cb9e3
PS		 2642 if (rc)
2643 return rc;
2644
2645 memcpy(data, begin_of_buf, buffer_length);
2646
2647 return 0;
2648}
2649
296ecbae
RS		 2650int
2651SMB2_query_info_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
2652 u64 persistent_fid, u64 volatile_fid,
2653 u8 info_class, u8 info_type, u32 additional_info,
2654 size_t output_len)
be4cb9e3
PS		 2655{
2656 struct smb2_query_info_req *req;
296ecbae 2657 struct kvec *iov = rqst->rq_iov;
b2fb7fec 2658 unsigned int total_len;
296ecbae 2659 int rc;
be4cb9e3 2660
b2fb7fec
RS		 2661 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
2662 &total_len);
be4cb9e3
PS		 2663 if (rc)
2664 return rc;
2665
42c493c1 2666 req->InfoType = info_type;
f0df737e 2667 req->FileInfoClass = info_class;
be4cb9e3
PS		 2668 req->PersistentFileId = persistent_fid;
2669 req->VolatileFileId = volatile_fid;
42c493c1 2670 req->AdditionalInformation = cpu_to_le32(additional_info);
48923d2a
AA		 2671
2672 /*
2673 * We do not use the input buffer (do not send extra byte)
2674 */
2675 req->InputBufferOffset = 0;
48923d2a 2676
f0df737e 2677 req->OutputBufferLength = cpu_to_le32(output_len);
be4cb9e3
PS		 2678
2679 iov[0].iov_base = (char *)req;
b2fb7fec
RS		 2680 /* 1 for Buffer */
2681 iov[0].iov_len = total_len - 1;
296ecbae
RS		 2682 return 0;
2683}
2684
2685void
2686SMB2_query_info_free(struct smb_rqst *rqst)
2687{
2688 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
2689}
2690
2691static int
2692query_info(const unsigned int xid, struct cifs_tcon *tcon,
2693 u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
2694 u32 additional_info, size_t output_len, size_t min_len, void **data,
2695 u32 *dlen)
2696{
2697 struct smb_rqst rqst;
2698 struct smb2_query_info_rsp *rsp = NULL;
2699 struct kvec iov[1];
2700 struct kvec rsp_iov;
2701 int rc = 0;
ef2298a0 2702 int resp_buftype = CIFS_NO_BUFFER;
296ecbae
RS		 2703 struct cifs_ses *ses = tcon->ses;
2704 int flags = 0;
2705
2706 cifs_dbg(FYI, "Query Info\n");
2707
2708 if (!ses || !(ses->server))
2709 return -EIO;
2710
2711 if (smb3_encryption_required(tcon))
2712 flags |= CIFS_TRANSFORM_REQ;
be4cb9e3 2713
40eff45b 2714 memset(&rqst, 0, sizeof(struct smb_rqst));
296ecbae 2715 memset(&iov, 0, sizeof(iov));
40eff45b
RS		 2716 rqst.rq_iov = iov;
2717 rqst.rq_nvec = 1;
2718
296ecbae
RS		 2719 rc = SMB2_query_info_init(tcon, &rqst, persistent_fid, volatile_fid,
2720 info_class, info_type, additional_info,
2721 output_len);
2722 if (rc)
2723 goto qinf_exit;
2724
40eff45b 2725 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 2726 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
e5d04887 2727
be4cb9e3
PS		 2728 if (rc) {
2729 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
eccb4422
SF		 2730 trace_smb3_query_info_err(xid, persistent_fid, tcon->tid,
2731 ses->Suid, info_class, (__u32)info_type, rc);
be4cb9e3
PS		 2732 goto qinf_exit;
2733 }
2734
42c493c1
SP		 2735 if (dlen) {
2736 *dlen = le32_to_cpu(rsp->OutputBufferLength);
2737 if (!*data) {
2738 *data = kmalloc(*dlen, GFP_KERNEL);
2739 if (!*data) {
2740 cifs_dbg(VFS,
2741 "Error %d allocating memory for acl\n",
2742 rc);
2743 *dlen = 0;
2744 goto qinf_exit;
2745 }
2746 }
2747 }
2748
c5a5f38f
RS		 2749 rc = smb2_validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset),
2750 le32_to_cpu(rsp->OutputBufferLength),
2751 &rsp_iov, min_len, *data);
be4cb9e3
PS		 2752
2753qinf_exit:
296ecbae 2754 SMB2_query_info_free(&rqst);
be4cb9e3
PS		 2755 free_rsp_buf(resp_buftype, rsp);
2756 return rc;
2757}
9094fad1 2758
95907fea 2759int SMB2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
7cb3def4
RS		 2760 u64 persistent_fid, u64 volatile_fid,
2761 int ea_buf_size, struct smb2_file_full_ea_info *data)
95907fea
RS		 2762{
2763 return query_info(xid, tcon, persistent_fid, volatile_fid,
2764 FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, 0,
7cb3def4 2765 ea_buf_size,
95907fea
RS		 2766 sizeof(struct smb2_file_full_ea_info),
2767 (void **)&data,
2768 NULL);
2769}
2770
42c493c1
SP		 2771int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
2772 u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data)
2773{
2774 return query_info(xid, tcon, persistent_fid, volatile_fid,
2775 FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0,
2776 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
2777 sizeof(struct smb2_file_all_info), (void **)&data,
2778 NULL);
2779}
2780
f0df737e 2781int
42c493c1 2782SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
f0df737e 2783 u64 persistent_fid, u64 volatile_fid,
42c493c1 2784 void **data, u32 *plen)
f0df737e 2785{
42c493c1
SP		 2786 __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO;
2787 *plen = 0;
2788
f0df737e 2789 return query_info(xid, tcon, persistent_fid, volatile_fid,
42c493c1 2790 0, SMB2_O_INFO_SECURITY, additional_info,
ee25c6dd 2791 SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen);
f0df737e
PS		 2792}
2793
2794int
2795SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
2796 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
2797{
2798 return query_info(xid, tcon, persistent_fid, volatile_fid,
42c493c1
SP		 2799 FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0,
2800 sizeof(struct smb2_file_internal_info),
f0df737e 2801 sizeof(struct smb2_file_internal_info),
42c493c1 2802 (void **)&uniqueid, NULL);
f0df737e
PS		 2803}
2804
9094fad1
PS		 2805/*
2806 * This is a no-op for now. We're not really interested in the reply, but
2807 * rather in the fact that the server sent one and that server->lstrp
2808 * gets updated.
2809 *
2810 * FIXME: maybe we should consider checking that the reply matches request?
2811 */
2812static void
2813smb2_echo_callback(struct mid_q_entry *mid)
2814{
2815 struct TCP_Server_Info *server = mid->callback_data;
31473fc4 2816 struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
9094fad1
PS		 2817 unsigned int credits_received = 1;
2818
2819 if (mid->mid_state == MID_RESPONSE_RECEIVED)
49f466bd 2820 credits_received = le16_to_cpu(rsp->sync_hdr.CreditRequest);
9094fad1
PS		 2821
2822 DeleteMidQEntry(mid);
2823 add_credits(server, credits_received, CIFS_ECHO_OP);
2824}
2825
53e0e11e
PS		 2826void smb2_reconnect_server(struct work_struct *work)
2827{
2828 struct TCP_Server_Info *server = container_of(work,
2829 struct TCP_Server_Info, reconnect.work);
2830 struct cifs_ses *ses;
2831 struct cifs_tcon *tcon, *tcon2;
2832 struct list_head tmp_list;
2833 int tcon_exist = false;
18ea4311
GP		 2834 int rc;
2835 int resched = false;
2836
53e0e11e
PS		 2837
2838 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2839 mutex_lock(&server->reconnect_mutex);
2840
2841 INIT_LIST_HEAD(&tmp_list);
2842 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
2843
2844 spin_lock(&cifs_tcp_ses_lock);
2845 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2846 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
96a988ff 2847 if (tcon->need_reconnect || tcon->need_reopen_files) {
53e0e11e
PS		 2848 tcon->tc_count++;
2849 list_add_tail(&tcon->rlist, &tmp_list);
2850 tcon_exist = true;
2851 }
2852 }
b327a717
AA		 2853 if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) {
2854 list_add_tail(&ses->tcon_ipc->rlist, &tmp_list);
2855 tcon_exist = true;
2856 }
53e0e11e
PS		 2857 }
2858 /*
2859 * Get the reference to server struct to be sure that the last call of
2860 * cifs_put_tcon() in the loop below won't release the server pointer.
2861 */
2862 if (tcon_exist)
2863 server->srv_count++;
2864
2865 spin_unlock(&cifs_tcp_ses_lock);
2866
2867 list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
18ea4311
GP		 2868 rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon);
2869 if (!rc)
96a988ff 2870 cifs_reopen_persistent_handles(tcon);
18ea4311
GP		 2871 else
2872 resched = true;
53e0e11e
PS		 2873 list_del_init(&tcon->rlist);
2874 cifs_put_tcon(tcon);
2875 }
2876
2877 cifs_dbg(FYI, "Reconnecting tcons finished\n");
18ea4311
GP		 2878 if (resched)
2879 queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
53e0e11e
PS		 2880 mutex_unlock(&server->reconnect_mutex);
2881
2882 /* now we can safely release srv struct */
2883 if (tcon_exist)
2884 cifs_put_tcp_session(server, 1);
2885}
2886
9094fad1
PS		 2887int
2888SMB2_echo(struct TCP_Server_Info *server)
2889{
2890 struct smb2_echo_req *req;
2891 int rc = 0;
c713c877 2892 struct kvec iov[1];
738f9de5 2893 struct smb_rqst rqst = { .rq_iov = iov,
c713c877 2894 .rq_nvec = 1 };
7f7ae759 2895 unsigned int total_len;
9094fad1 2896
f96637be 2897 cifs_dbg(FYI, "In echo request\n");
9094fad1 2898
4fcd1813 2899 if (server->tcpStatus == CifsNeedNegotiate) {
53e0e11e
PS		 2900 /* No need to send echo on newly established connections */
2901 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
2902 return rc;
4fcd1813
SF		 2903 }
2904
7f7ae759 2905 rc = smb2_plain_req_init(SMB2_ECHO, NULL, (void **)&req, &total_len);
9094fad1
PS		 2906 if (rc)
2907 return rc;
2908
7f7ae759 2909 req->sync_hdr.CreditRequest = cpu_to_le16(1);
9094fad1 2910
c713c877
RS		 2911 iov[0].iov_len = total_len;
2912 iov[0].iov_base = (char *)req;
9094fad1 2913
9b7c18a2
PS		 2914 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
2915 server, CIFS_ECHO_OP);
9094fad1 2916 if (rc)
f96637be 2917 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
9094fad1
PS		 2918
2919 cifs_small_buf_release(req);
2920 return rc;
2921}
7a5cfb19
PS		 2922
2923int
2924SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2925 u64 volatile_fid)
2926{
40eff45b 2927 struct smb_rqst rqst;
7a5cfb19 2928 struct smb2_flush_req *req;
7a5cfb19
PS		 2929 struct cifs_ses *ses = tcon->ses;
2930 struct kvec iov[1];
da502f7d 2931 struct kvec rsp_iov;
7a5cfb19
PS		 2932 int resp_buftype;
2933 int rc = 0;
7fb8986e 2934 int flags = 0;
1f444e4c 2935 unsigned int total_len;
7a5cfb19 2936
f96637be 2937 cifs_dbg(FYI, "Flush\n");
7a5cfb19 2938
68a6afa7 2939 if (!ses || !(ses->server))
7a5cfb19
PS		 2940 return -EIO;
2941
1f444e4c 2942 rc = smb2_plain_req_init(SMB2_FLUSH, tcon, (void **) &req, &total_len);
7a5cfb19
PS		 2943 if (rc)
2944 return rc;
2945
5a77e75f 2946 if (smb3_encryption_required(tcon))
7fb8986e
PS		 2947 flags |= CIFS_TRANSFORM_REQ;
2948
7a5cfb19
PS		 2949 req->PersistentFileId = persistent_fid;
2950 req->VolatileFileId = volatile_fid;
2951
2952 iov[0].iov_base = (char *)req;
1f444e4c 2953 iov[0].iov_len = total_len;
7a5cfb19 2954
40eff45b
RS		 2955 memset(&rqst, 0, sizeof(struct smb_rqst));
2956 rqst.rq_iov = iov;
2957 rqst.rq_nvec = 1;
2958
2959 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 2960 cifs_small_buf_release(req);
7a5cfb19 2961
eccb4422 2962 if (rc != 0) {
7a5cfb19 2963 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
eccb4422
SF		 2964 trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid,
2965 rc);
2966 }
7a5cfb19 2967
da502f7d 2968 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
7a5cfb19
PS		 2969 return rc;
2970}
09a4707e
PS		 2971
2972/*
2973 * To form a chain of read requests, any read requests after the first should
2974 * have the end_of_chain boolean set to true.
2975 */
2976static int
738f9de5 2977smb2_new_read_req(void **buf, unsigned int *total_len,
2dabfd5b
LL		 2978 struct cifs_io_parms *io_parms, struct cifs_readdata *rdata,
2979 unsigned int remaining_bytes, int request_type)
09a4707e
PS		 2980{
2981 int rc = -EACCES;
b8f57ee8 2982 struct smb2_read_plain_req *req = NULL;
31473fc4 2983 struct smb2_sync_hdr *shdr;
2dabfd5b 2984 struct TCP_Server_Info *server;
09a4707e 2985
b8f57ee8
PS		 2986 rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
2987 total_len);
09a4707e
PS		 2988 if (rc)
2989 return rc;
2dabfd5b
LL		 2990
2991 server = io_parms->tcon->ses->server;
2992 if (server == NULL)
09a4707e
PS		 2993 return -ECONNABORTED;
2994
b8f57ee8 2995 shdr = &req->sync_hdr;
31473fc4 2996 shdr->ProcessId = cpu_to_le32(io_parms->pid);
09a4707e
PS		 2997
2998 req->PersistentFileId = io_parms->persistent_fid;
2999 req->VolatileFileId = io_parms->volatile_fid;
3000 req->ReadChannelInfoOffset = 0; /* reserved */
3001 req->ReadChannelInfoLength = 0; /* reserved */
3002 req->Channel = 0; /* reserved */
3003 req->MinimumCount = 0;
3004 req->Length = cpu_to_le32(io_parms->length);
3005 req->Offset = cpu_to_le64(io_parms->offset);
bd3dcc6a
LL		 3006#ifdef CONFIG_CIFS_SMB_DIRECT
3007 /*
3008 * If we want to do a RDMA write, fill in and append
3009 * smbd_buffer_descriptor_v1 to the end of read request
3010 */
bb4c0419 3011 if (server->rdma && rdata && !server->sign &&
bd3dcc6a
LL		 3012 rdata->bytes >= server->smbd_conn->rdma_readwrite_threshold) {
3013
3014 struct smbd_buffer_descriptor_v1 *v1;
3015 bool need_invalidate =
3016 io_parms->tcon->ses->server->dialect == SMB30_PROT_ID;
3017
3018 rdata->mr = smbd_register_mr(
3019 server->smbd_conn, rdata->pages,
7cf20bce
LL		 3020 rdata->nr_pages, rdata->page_offset,
3021 rdata->tailsz, true, need_invalidate);
bd3dcc6a
LL		 3022 if (!rdata->mr)
3023 return -ENOBUFS;
3024
3025 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
3026 if (need_invalidate)
3027 req->Channel = SMB2_CHANNEL_RDMA_V1;
3028 req->ReadChannelInfoOffset =
2026b06e 3029 cpu_to_le16(offsetof(struct smb2_read_plain_req, Buffer));
bd3dcc6a 3030 req->ReadChannelInfoLength =
2026b06e 3031 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
bd3dcc6a 3032 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
2026b06e
SF		 3033 v1->offset = cpu_to_le64(rdata->mr->mr->iova);
3034 v1->token = cpu_to_le32(rdata->mr->mr->rkey);
3035 v1->length = cpu_to_le32(rdata->mr->mr->length);
bd3dcc6a
LL		 3036
3037 *total_len += sizeof(*v1) - 1;
3038 }
3039#endif
09a4707e
PS		 3040 if (request_type & CHAINED_REQUEST) {
3041 if (!(request_type & END_OF_CHAIN)) {
b8f57ee8
PS		 3042 /* next 8-byte aligned request */
3043 *total_len = DIV_ROUND_UP(*total_len, 8) * 8;
3044 shdr->NextCommand = cpu_to_le32(*total_len);
09a4707e 3045 } else /* END_OF_CHAIN */
31473fc4 3046 shdr->NextCommand = 0;
09a4707e 3047 if (request_type & RELATED_REQUEST) {
31473fc4 3048 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
09a4707e
PS		 3049 /*
3050 * Related requests use info from previous read request
3051 * in chain.
3052 */
31473fc4
PS		 3053 shdr->SessionId = 0xFFFFFFFF;
3054 shdr->TreeId = 0xFFFFFFFF;
09a4707e
PS		 3055 req->PersistentFileId = 0xFFFFFFFF;
3056 req->VolatileFileId = 0xFFFFFFFF;
3057 }
3058 }
3059 if (remaining_bytes > io_parms->length)
3060 req->RemainingBytes = cpu_to_le32(remaining_bytes);
3061 else
3062 req->RemainingBytes = 0;
3063
738f9de5 3064 *buf = req;
09a4707e
PS		 3065 return rc;
3066}
3067
3068static void
3069smb2_readv_callback(struct mid_q_entry *mid)
3070{
3071 struct cifs_readdata *rdata = mid->callback_data;
3072 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
3073 struct TCP_Server_Info *server = tcon->ses->server;
738f9de5 3074 struct smb2_sync_hdr *shdr =
977b6170 3075 (struct smb2_sync_hdr *)rdata->iov[0].iov_base;
09a4707e 3076 unsigned int credits_received = 1;
738f9de5
PS		 3077 struct smb_rqst rqst = { .rq_iov = rdata->iov,
3078 .rq_nvec = 2,
8321fec4 3079 .rq_pages = rdata->pages,
1dbe3466 3080 .rq_offset = rdata->page_offset,
8321fec4
JL		 3081 .rq_npages = rdata->nr_pages,
3082 .rq_pagesz = rdata->pagesz,
3083 .rq_tailsz = rdata->tailsz };
09a4707e 3084
f96637be
JP		 3085 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
3086 __func__, mid->mid, mid->mid_state, rdata->result,
3087 rdata->bytes);
09a4707e
PS		 3088
3089 switch (mid->mid_state) {
3090 case MID_RESPONSE_RECEIVED:
31473fc4 3091 credits_received = le16_to_cpu(shdr->CreditRequest);
09a4707e 3092 /* result already set, check signature */
4326ed2f 3093 if (server->sign && !mid->decrypted) {
3c1bf7e4
PS		 3094 int rc;
3095
0b688cfc 3096 rc = smb2_verify_signature(&rqst, server);
3c1bf7e4 3097 if (rc)
f96637be
JP		 3098 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
3099 rc);
3c1bf7e4 3100 }
09a4707e 3101 /* FIXME: should this be counted toward the initiating task? */
34a54d61
PS		 3102 task_io_account_read(rdata->got_bytes);
3103 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 3104 break;
3105 case MID_REQUEST_SUBMITTED:
3106 case MID_RETRY_NEEDED:
3107 rdata->result = -EAGAIN;
d913ed17
PS		 3108 if (server->sign && rdata->got_bytes)
3109 /* reset bytes number since we can not check a sign */
3110 rdata->got_bytes = 0;
3111 /* FIXME: should this be counted toward the initiating task? */
3112 task_io_account_read(rdata->got_bytes);
3113 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 3114 break;
3115 default:
3116 if (rdata->result != -ENODATA)
3117 rdata->result = -EIO;
3118 }
bd3dcc6a
LL		 3119#ifdef CONFIG_CIFS_SMB_DIRECT
3120 /*
3121 * If this rdata has a memmory registered, the MR can be freed
3122 * MR needs to be freed as soon as I/O finishes to prevent deadlock
3123 * because they have limited number and are used for future I/Os
3124 */
3125 if (rdata->mr) {
3126 smbd_deregister_mr(rdata->mr);
3127 rdata->mr = NULL;
3128 }
3129#endif
09a4707e
PS		 3130 if (rdata->result)
3131 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
3132
3133 queue_work(cifsiod_wq, &rdata->work);
3134 DeleteMidQEntry(mid);
3135 add_credits(server, credits_received, 0);
3136}
3137
738f9de5 3138/* smb2_async_readv - send an async read, and set up mid to handle result */
09a4707e
PS		 3139int
3140smb2_async_readv(struct cifs_readdata *rdata)
3141{
bed9da02 3142 int rc, flags = 0;
31473fc4
PS		 3143 char *buf;
3144 struct smb2_sync_hdr *shdr;
09a4707e 3145 struct cifs_io_parms io_parms;
738f9de5 3146 struct smb_rqst rqst = { .rq_iov = rdata->iov,
c713c877 3147 .rq_nvec = 1 };
bed9da02 3148 struct TCP_Server_Info *server;
738f9de5 3149 unsigned int total_len;
09a4707e 3150
f96637be
JP		 3151 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
3152 __func__, rdata->offset, rdata->bytes);
09a4707e
PS		 3153
3154 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
3155 io_parms.offset = rdata->offset;
3156 io_parms.length = rdata->bytes;
3157 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
3158 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
3159 io_parms.pid = rdata->pid;
bed9da02
PS		 3160
3161 server = io_parms.tcon->ses->server;
3162
2dabfd5b
LL		 3163 rc = smb2_new_read_req(
3164 (void **) &buf, &total_len, &io_parms, rdata, 0, 0);
bed9da02
PS		 3165 if (rc) {
3166 if (rc == -EAGAIN && rdata->credits) {
3167 /* credits was reset by reconnect */
3168 rdata->credits = 0;
3169 /* reduce in_flight value since we won't send the req */
3170 spin_lock(&server->req_lock);
3171 server->in_flight--;
3172 spin_unlock(&server->req_lock);
3173 }
09a4707e 3174 return rc;
bed9da02 3175 }
09a4707e 3176
5a77e75f 3177 if (smb3_encryption_required(io_parms.tcon))
7fb8986e
PS		 3178 flags |= CIFS_TRANSFORM_REQ;
3179
c713c877
RS		 3180 rdata->iov[0].iov_base = buf;
3181 rdata->iov[0].iov_len = total_len;
b8f57ee8
PS		 3182
3183 shdr = (struct smb2_sync_hdr *)buf;
09a4707e 3184
bed9da02 3185 if (rdata->credits) {
31473fc4 3186 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
bed9da02 3187 SMB2_MAX_BUFFER_SIZE));
31473fc4 3188 shdr->CreditRequest = shdr->CreditCharge;
bed9da02
PS		 3189 spin_lock(&server->req_lock);
3190 server->credits += rdata->credits -
31473fc4 3191 le16_to_cpu(shdr->CreditCharge);
bed9da02
PS		 3192 spin_unlock(&server->req_lock);
3193 wake_up(&server->request_q);
7fb8986e 3194 flags |= CIFS_HAS_CREDITS;
bed9da02
PS		 3195 }
3196
09a4707e 3197 kref_get(&rdata->refcount);
fec344e3 3198 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
09a4707e 3199 cifs_readv_receive, smb2_readv_callback,
4326ed2f 3200 smb3_handle_read_data, rdata, flags);
e5d04887 3201 if (rc) {
09a4707e 3202 kref_put(&rdata->refcount, cifs_readdata_release);
e5d04887 3203 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
eccb4422
SF		 3204 trace_smb3_read_err(rc, 0 /* xid */, io_parms.persistent_fid,
3205 io_parms.tcon->tid, io_parms.tcon->ses->Suid,
3206 io_parms.offset, io_parms.length);
3207 } else
3208 trace_smb3_read_done(0 /* xid */, io_parms.persistent_fid,
3209 io_parms.tcon->tid, io_parms.tcon->ses->Suid,
3210 io_parms.offset, io_parms.length);
09a4707e
PS		 3211
3212 cifs_small_buf_release(buf);
3213 return rc;
3214}
33319141 3215
d8e05039
PS		 3216int
3217SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
3218 unsigned int *nbytes, char **buf, int *buf_type)
3219{
40eff45b 3220 struct smb_rqst rqst;
d8e05039 3221 int resp_buftype, rc = -EACCES;
b8f57ee8 3222 struct smb2_read_plain_req *req = NULL;
d8e05039 3223 struct smb2_read_rsp *rsp = NULL;
f5688a6d 3224 struct kvec iov[1];
da502f7d 3225 struct kvec rsp_iov;
738f9de5 3226 unsigned int total_len;
7fb8986e
PS		 3227 int flags = CIFS_LOG_ERROR;
3228 struct cifs_ses *ses = io_parms->tcon->ses;
d8e05039
PS		 3229
3230 *nbytes = 0;
2dabfd5b 3231 rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0);
d8e05039
PS		 3232 if (rc)
3233 return rc;
3234
5a77e75f 3235 if (smb3_encryption_required(io_parms->tcon))
7fb8986e
PS		 3236 flags |= CIFS_TRANSFORM_REQ;
3237
f5688a6d
RS		 3238 iov[0].iov_base = (char *)req;
3239 iov[0].iov_len = total_len;
b8f57ee8 3240
40eff45b
RS		 3241 memset(&rqst, 0, sizeof(struct smb_rqst));
3242 rqst.rq_iov = iov;
3243 rqst.rq_nvec = 1;
3244
3245 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
b8f57ee8 3246 cifs_small_buf_release(req);
d8e05039 3247
da502f7d 3248 rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
d8e05039 3249
a821df3f
RS		 3250 if (rc) {
3251 if (rc != -ENODATA) {
3252 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
3253 cifs_dbg(VFS, "Send error in read = %d\n", rc);
3254 }
eccb4422
SF		 3255 trace_smb3_read_err(rc, xid, req->PersistentFileId,
3256 io_parms->tcon->tid, ses->Suid,
3257 io_parms->offset, io_parms->length);
da502f7d 3258 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
a821df3f 3259 return rc == -ENODATA ? 0 : rc;
eccb4422
SF		 3260 } else
3261 trace_smb3_read_done(xid, req->PersistentFileId,
3262 io_parms->tcon->tid, ses->Suid,
3263 io_parms->offset, io_parms->length);
d8e05039 3264
a821df3f
RS		 3265 *nbytes = le32_to_cpu(rsp->DataLength);
3266 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
3267 (*nbytes > io_parms->length)) {
3268 cifs_dbg(FYI, "bad length %d for count %d\n",
3269 *nbytes, io_parms->length);
3270 rc = -EIO;
3271 *nbytes = 0;
d8e05039
PS		 3272 }
3273
3274 if (*buf) {
977b6170 3275 memcpy(*buf, (char *)rsp + rsp->DataOffset, *nbytes);
da502f7d 3276 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
d8e05039 3277 } else if (resp_buftype != CIFS_NO_BUFFER) {
da502f7d 3278 *buf = rsp_iov.iov_base;
d8e05039
PS		 3279 if (resp_buftype == CIFS_SMALL_BUFFER)
3280 *buf_type = CIFS_SMALL_BUFFER;
3281 else if (resp_buftype == CIFS_LARGE_BUFFER)
3282 *buf_type = CIFS_LARGE_BUFFER;
3283 }
3284 return rc;
3285}
3286
33319141
PS		 3287/*
3288 * Check the mid_state and signature on received buffer (if any), and queue the
3289 * workqueue completion task.
3290 */
3291static void
3292smb2_writev_callback(struct mid_q_entry *mid)
3293{
3294 struct cifs_writedata *wdata = mid->callback_data;
3295 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
3296 unsigned int written;
3297 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
3298 unsigned int credits_received = 1;
3299
3300 switch (mid->mid_state) {
3301 case MID_RESPONSE_RECEIVED:
49f466bd 3302 credits_received = le16_to_cpu(rsp->sync_hdr.CreditRequest);
33319141
PS		 3303 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
3304 if (wdata->result != 0)
3305 break;
3306
3307 written = le32_to_cpu(rsp->DataLength);
3308 /*
3309 * Mask off high 16 bits when bytes written as returned
3310 * by the server is greater than bytes requested by the
3311 * client. OS/2 servers are known to set incorrect
3312 * CountHigh values.
3313 */
3314 if (written > wdata->bytes)
3315 written &= 0xFFFF;
3316
3317 if (written < wdata->bytes)
3318 wdata->result = -ENOSPC;
3319 else
3320 wdata->bytes = written;
3321 break;
3322 case MID_REQUEST_SUBMITTED:
3323 case MID_RETRY_NEEDED:
3324 wdata->result = -EAGAIN;
3325 break;
3326 default:
3327 wdata->result = -EIO;
3328 break;
3329 }
db223a59
LL		 3330#ifdef CONFIG_CIFS_SMB_DIRECT
3331 /*
3332 * If this wdata has a memory registered, the MR can be freed
3333 * The number of MRs available is limited, it's important to recover
3334 * used MR as soon as I/O is finished. Hold MR longer in the later
3335 * I/O process can possibly result in I/O deadlock due to lack of MR
3336 * to send request on I/O retry
3337 */
3338 if (wdata->mr) {
3339 smbd_deregister_mr(wdata->mr);
3340 wdata->mr = NULL;
3341 }
3342#endif
33319141
PS		 3343 if (wdata->result)
3344 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
3345
3346 queue_work(cifsiod_wq, &wdata->work);
3347 DeleteMidQEntry(mid);
3348 add_credits(tcon->ses->server, credits_received, 0);
3349}
3350
3351/* smb2_async_writev - send an async write, and set up mid to handle result */
3352int
4a5c80d7
SF		 3353smb2_async_writev(struct cifs_writedata *wdata,
3354 void (*release)(struct kref *kref))
33319141 3355{
cb7e9eab 3356 int rc = -EACCES, flags = 0;
33319141 3357 struct smb2_write_req *req = NULL;
31473fc4 3358 struct smb2_sync_hdr *shdr;
33319141 3359 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
cb7e9eab 3360 struct TCP_Server_Info *server = tcon->ses->server;
c713c877 3361 struct kvec iov[1];
738f9de5 3362 struct smb_rqst rqst = { };
f5688a6d 3363 unsigned int total_len;
33319141 3364
f5688a6d 3365 rc = smb2_plain_req_init(SMB2_WRITE, tcon, (void **) &req, &total_len);
cb7e9eab
PS		 3366 if (rc) {
3367 if (rc == -EAGAIN && wdata->credits) {
3368 /* credits was reset by reconnect */
3369 wdata->credits = 0;
3370 /* reduce in_flight value since we won't send the req */
3371 spin_lock(&server->req_lock);
3372 server->in_flight--;
3373 spin_unlock(&server->req_lock);
3374 }
33319141 3375 goto async_writev_out;
cb7e9eab 3376 }
33319141 3377
5a77e75f 3378 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3379 flags |= CIFS_TRANSFORM_REQ;
3380
f5688a6d 3381 shdr = (struct smb2_sync_hdr *)req;
31473fc4 3382 shdr->ProcessId = cpu_to_le32(wdata->cfile->pid);
33319141
PS		 3383
3384 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
3385 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
3386 req->WriteChannelInfoOffset = 0;
3387 req->WriteChannelInfoLength = 0;
3388 req->Channel = 0;
3389 req->Offset = cpu_to_le64(wdata->offset);
33319141 3390 req->DataOffset = cpu_to_le16(
f5688a6d 3391 offsetof(struct smb2_write_req, Buffer));
33319141 3392 req->RemainingBytes = 0;
db223a59
LL		 3393#ifdef CONFIG_CIFS_SMB_DIRECT
3394 /*
3395 * If we want to do a server RDMA read, fill in and append
3396 * smbd_buffer_descriptor_v1 to the end of write request
3397 */
bb4c0419 3398 if (server->rdma && !server->sign && wdata->bytes >=
db223a59
LL		 3399 server->smbd_conn->rdma_readwrite_threshold) {
3400
3401 struct smbd_buffer_descriptor_v1 *v1;
3402 bool need_invalidate = server->dialect == SMB30_PROT_ID;
3403
3404 wdata->mr = smbd_register_mr(
3405 server->smbd_conn, wdata->pages,
7cf20bce
LL		 3406 wdata->nr_pages, wdata->page_offset,
3407 wdata->tailsz, false, need_invalidate);
db223a59
LL		 3408 if (!wdata->mr) {
3409 rc = -ENOBUFS;
3410 goto async_writev_out;
3411 }
3412 req->Length = 0;
3413 req->DataOffset = 0;
7cf20bce
LL		 3414 if (wdata->nr_pages > 1)
3415 req->RemainingBytes =
3416 cpu_to_le32(
3417 (wdata->nr_pages - 1) * wdata->pagesz -
3418 wdata->page_offset + wdata->tailsz
3419 );
3420 else
3421 req->RemainingBytes = cpu_to_le32(wdata->tailsz);
db223a59
LL		 3422 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
3423 if (need_invalidate)
3424 req->Channel = SMB2_CHANNEL_RDMA_V1;
3425 req->WriteChannelInfoOffset =
2026b06e 3426 cpu_to_le16(offsetof(struct smb2_write_req, Buffer));
db223a59 3427 req->WriteChannelInfoLength =
2026b06e 3428 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
db223a59 3429 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
2026b06e
SF		 3430 v1->offset = cpu_to_le64(wdata->mr->mr->iova);
3431 v1->token = cpu_to_le32(wdata->mr->mr->rkey);
3432 v1->length = cpu_to_le32(wdata->mr->mr->length);
db223a59
LL		 3433 }
3434#endif
c713c877
RS		 3435 iov[0].iov_len = total_len - 1;
3436 iov[0].iov_base = (char *)req;
33319141 3437
738f9de5 3438 rqst.rq_iov = iov;
c713c877 3439 rqst.rq_nvec = 1;
eddb079d 3440 rqst.rq_pages = wdata->pages;
57a929a6 3441 rqst.rq_offset = wdata->page_offset;
eddb079d
JL		 3442 rqst.rq_npages = wdata->nr_pages;
3443 rqst.rq_pagesz = wdata->pagesz;
3444 rqst.rq_tailsz = wdata->tailsz;
db223a59
LL		 3445#ifdef CONFIG_CIFS_SMB_DIRECT
3446 if (wdata->mr) {
c713c877 3447 iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1);
db223a59
LL		 3448 rqst.rq_npages = 0;
3449 }
3450#endif
f96637be
JP		 3451 cifs_dbg(FYI, "async write at %llu %u bytes\n",
3452 wdata->offset, wdata->bytes);
33319141 3453
db223a59
LL		 3454#ifdef CONFIG_CIFS_SMB_DIRECT
3455 /* For RDMA read, I/O size is in RemainingBytes not in Length */
3456 if (!wdata->mr)
3457 req->Length = cpu_to_le32(wdata->bytes);
3458#else
33319141 3459 req->Length = cpu_to_le32(wdata->bytes);
db223a59 3460#endif
33319141 3461
cb7e9eab 3462 if (wdata->credits) {
31473fc4 3463 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
cb7e9eab 3464 SMB2_MAX_BUFFER_SIZE));
31473fc4 3465 shdr->CreditRequest = shdr->CreditCharge;
cb7e9eab
PS		 3466 spin_lock(&server->req_lock);
3467 server->credits += wdata->credits -
31473fc4 3468 le16_to_cpu(shdr->CreditCharge);
cb7e9eab
PS		 3469 spin_unlock(&server->req_lock);
3470 wake_up(&server->request_q);
7fb8986e 3471 flags |= CIFS_HAS_CREDITS;
cb7e9eab
PS		 3472 }
3473
33319141 3474 kref_get(&wdata->refcount);
9b7c18a2
PS		 3475 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
3476 wdata, flags);
33319141 3477
e5d04887 3478 if (rc) {
eccb4422
SF		 3479 trace_smb3_write_err(0 /* no xid */, req->PersistentFileId,
3480 tcon->tid, tcon->ses->Suid, wdata->offset,
3481 wdata->bytes, rc);
4a5c80d7 3482 kref_put(&wdata->refcount, release);
e5d04887 3483 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
eccb4422
SF		 3484 } else
3485 trace_smb3_write_done(0 /* no xid */, req->PersistentFileId,
3486 tcon->tid, tcon->ses->Suid, wdata->offset,
3487 wdata->bytes);
33319141 3488
33319141
PS		 3489async_writev_out:
3490 cifs_small_buf_release(req);
33319141
PS		 3491 return rc;
3492}
009d3443
PS		 3493
3494/*
3495 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
3496 * The length field from io_parms must be at least 1 and indicates a number of
3497 * elements with data to write that begins with position 1 in iov array. All
3498 * data length is specified by count.
3499 */
3500int
3501SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
3502 unsigned int *nbytes, struct kvec *iov, int n_vec)
3503{
40eff45b 3504 struct smb_rqst rqst;
009d3443
PS		 3505 int rc = 0;
3506 struct smb2_write_req *req = NULL;
3507 struct smb2_write_rsp *rsp = NULL;
3508 int resp_buftype;
da502f7d 3509 struct kvec rsp_iov;
7fb8986e 3510 int flags = 0;
f5688a6d 3511 unsigned int total_len;
da502f7d 3512
009d3443
PS		 3513 *nbytes = 0;
3514
3515 if (n_vec < 1)
3516 return rc;
3517
f5688a6d
RS		 3518 rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, (void **) &req,
3519 &total_len);
009d3443
PS		 3520 if (rc)
3521 return rc;
3522
3523 if (io_parms->tcon->ses->server == NULL)
3524 return -ECONNABORTED;
3525
5a77e75f 3526 if (smb3_encryption_required(io_parms->tcon))
7fb8986e
PS		 3527 flags |= CIFS_TRANSFORM_REQ;
3528
f5688a6d 3529 req->sync_hdr.ProcessId = cpu_to_le32(io_parms->pid);
009d3443
PS		 3530
3531 req->PersistentFileId = io_parms->persistent_fid;
3532 req->VolatileFileId = io_parms->volatile_fid;
3533 req->WriteChannelInfoOffset = 0;
3534 req->WriteChannelInfoLength = 0;
3535 req->Channel = 0;
3536 req->Length = cpu_to_le32(io_parms->length);
3537 req->Offset = cpu_to_le64(io_parms->offset);
009d3443 3538 req->DataOffset = cpu_to_le16(
f5688a6d 3539 offsetof(struct smb2_write_req, Buffer));
009d3443
PS		 3540 req->RemainingBytes = 0;
3541
3542 iov[0].iov_base = (char *)req;
f5688a6d
RS		 3543 /* 1 for Buffer */
3544 iov[0].iov_len = total_len - 1;
009d3443 3545
40eff45b
RS		 3546 memset(&rqst, 0, sizeof(struct smb_rqst));
3547 rqst.rq_iov = iov;
3548 rqst.rq_nvec = n_vec + 1;
3549
3550 rc = cifs_send_recv(xid, io_parms->tcon->ses, &rqst,
f5688a6d 3551 &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 3552 cifs_small_buf_release(req);
3553 rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
009d3443
PS		 3554
3555 if (rc) {
eccb4422
SF		 3556 trace_smb3_write_err(xid, req->PersistentFileId,
3557 io_parms->tcon->tid,
3558 io_parms->tcon->ses->Suid,
3559 io_parms->offset, io_parms->length, rc);
009d3443 3560 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
f96637be 3561 cifs_dbg(VFS, "Send error in write = %d\n", rc);
eccb4422 3562 } else {
009d3443 3563 *nbytes = le32_to_cpu(rsp->DataLength);
eccb4422
SF		 3564 trace_smb3_write_done(xid, req->PersistentFileId,
3565 io_parms->tcon->tid,
3566 io_parms->tcon->ses->Suid,
3567 io_parms->offset, *nbytes);
3568 }
e5d04887
PS		 3569
3570 free_rsp_buf(resp_buftype, rsp);
009d3443
PS		 3571 return rc;
3572}
35143eb5 3573
d324f08d
PS		 3574static unsigned int
3575num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
3576{
3577 int len;
3578 unsigned int entrycount = 0;
3579 unsigned int next_offset = 0;
56446f21
DC		 3580 char *entryptr;
3581 FILE_DIRECTORY_INFO *dir_info;
d324f08d
PS		 3582
3583 if (bufstart == NULL)
3584 return 0;
3585
56446f21 3586 entryptr = bufstart;
d324f08d
PS		 3587
3588 while (1) {
56446f21
DC		 3589 if (entryptr + next_offset < entryptr ||
3590 entryptr + next_offset > end_of_buf ||
3591 entryptr + next_offset + size > end_of_buf) {
f96637be 3592 cifs_dbg(VFS, "malformed search entry would overflow\n");
d324f08d
PS		 3593 break;
3594 }
3595
56446f21
DC		 3596 entryptr = entryptr + next_offset;
3597 dir_info = (FILE_DIRECTORY_INFO *)entryptr;
3598
3599 len = le32_to_cpu(dir_info->FileNameLength);
3600 if (entryptr + len < entryptr ||
3601 entryptr + len > end_of_buf ||
3602 entryptr + len + size > end_of_buf) {
f96637be
JP		 3603 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
3604 end_of_buf);
d324f08d
PS		 3605 break;
3606 }
3607
56446f21 3608 *lastentry = entryptr;
d324f08d
PS		 3609 entrycount++;
3610
56446f21 3611 next_offset = le32_to_cpu(dir_info->NextEntryOffset);
d324f08d
PS		 3612 if (!next_offset)
3613 break;
3614 }
3615
3616 return entrycount;
3617}
3618
3619/*
3620 * Readdir/FindFirst
3621 */
3622int
3623SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
3624 u64 persistent_fid, u64 volatile_fid, int index,
3625 struct cifs_search_info *srch_inf)
3626{
40eff45b 3627 struct smb_rqst rqst;
d324f08d
PS		 3628 struct smb2_query_directory_req *req;
3629 struct smb2_query_directory_rsp *rsp = NULL;
3630 struct kvec iov[2];
da502f7d 3631 struct kvec rsp_iov;
d324f08d
PS		 3632 int rc = 0;
3633 int len;
75fdfc84 3634 int resp_buftype = CIFS_NO_BUFFER;
d324f08d
PS		 3635 unsigned char *bufptr;
3636 struct TCP_Server_Info *server;
3637 struct cifs_ses *ses = tcon->ses;
3638 __le16 asteriks = cpu_to_le16('*');
3639 char *end_of_smb;
3640 unsigned int output_size = CIFSMaxBufSize;
3641 size_t info_buf_size;
7fb8986e 3642 int flags = 0;
7c00c3a6 3643 unsigned int total_len;
d324f08d
PS		 3644
3645 if (ses && (ses->server))
3646 server = ses->server;
3647 else
3648 return -EIO;
3649
7c00c3a6
RS		 3650 rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req,
3651 &total_len);
d324f08d
PS		 3652 if (rc)
3653 return rc;
3654
5a77e75f 3655 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3656 flags |= CIFS_TRANSFORM_REQ;
3657
d324f08d
PS		 3658 switch (srch_inf->info_level) {
3659 case SMB_FIND_FILE_DIRECTORY_INFO:
3660 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
3661 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
3662 break;
3663 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
3664 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
3665 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
3666 break;
3667 default:
f96637be
JP		 3668 cifs_dbg(VFS, "info level %u isn't supported\n",
3669 srch_inf->info_level);
d324f08d
PS		 3670 rc = -EINVAL;
3671 goto qdir_exit;
3672 }
3673
3674 req->FileIndex = cpu_to_le32(index);
3675 req->PersistentFileId = persistent_fid;
3676 req->VolatileFileId = volatile_fid;
3677
3678 len = 0x2;
3679 bufptr = req->Buffer;
3680 memcpy(bufptr, &asteriks, len);
3681
3682 req->FileNameOffset =
7c00c3a6 3683 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1);
d324f08d
PS		 3684 req->FileNameLength = cpu_to_le16(len);
3685 /*
3686 * BB could be 30 bytes or so longer if we used SMB2 specific
3687 * buffer lengths, but this is safe and close enough.
3688 */
3689 output_size = min_t(unsigned int, output_size, server->maxBuf);
3690 output_size = min_t(unsigned int, output_size, 2 << 15);
3691 req->OutputBufferLength = cpu_to_le32(output_size);
3692
3693 iov[0].iov_base = (char *)req;
7c00c3a6
RS		 3694 /* 1 for Buffer */
3695 iov[0].iov_len = total_len - 1;
d324f08d
PS		 3696
3697 iov[1].iov_base = (char *)(req->Buffer);
3698 iov[1].iov_len = len;
3699
40eff45b
RS		 3700 memset(&rqst, 0, sizeof(struct smb_rqst));
3701 rqst.rq_iov = iov;
3702 rqst.rq_nvec = 2;
3703
3704 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 3705 cifs_small_buf_release(req);
3706 rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
e5d04887 3707
d324f08d 3708 if (rc) {
31473fc4 3709 if (rc == -ENODATA &&
49f466bd 3710 rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
52755808
PS		 3711 srch_inf->endOfSearch = true;
3712 rc = 0;
3713 }
d324f08d
PS		 3714 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
3715 goto qdir_exit;
3716 }
d324f08d 3717
730928c8
RS		 3718 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
3719 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
3720 info_buf_size);
d324f08d
PS		 3721 if (rc)
3722 goto qdir_exit;
3723
3724 srch_inf->unicode = true;
3725
3726 if (srch_inf->ntwrk_buf_start) {
3727 if (srch_inf->smallBuf)
3728 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
3729 else
3730 cifs_buf_release(srch_inf->ntwrk_buf_start);
3731 }
3732 srch_inf->ntwrk_buf_start = (char *)rsp;
977b6170
RS		 3733 srch_inf->srch_entries_start = srch_inf->last_entry =
3734 (char *)rsp + le16_to_cpu(rsp->OutputBufferOffset);
3735 end_of_smb = rsp_iov.iov_len + (char *)rsp;
d324f08d
PS		 3736 srch_inf->entries_in_buffer =
3737 num_entries(srch_inf->srch_entries_start, end_of_smb,
3738 &srch_inf->last_entry, info_buf_size);
3739 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
f96637be
JP		 3740 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
3741 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
3742 srch_inf->srch_entries_start, srch_inf->last_entry);
d324f08d
PS		 3743 if (resp_buftype == CIFS_LARGE_BUFFER)
3744 srch_inf->smallBuf = false;
3745 else if (resp_buftype == CIFS_SMALL_BUFFER)
3746 srch_inf->smallBuf = true;
3747 else
f96637be 3748 cifs_dbg(VFS, "illegal search buffer type\n");
d324f08d 3749
d324f08d
PS		 3750 return rc;
3751
3752qdir_exit:
3753 free_rsp_buf(resp_buftype, rsp);
3754 return rc;
3755}
3756
ba8ca116
RS		 3757int
3758SMB2_set_info_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
dac95340 3759 u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
ba8ca116 3760 u8 info_type, u32 additional_info,
dac95340 3761 void **data, unsigned int *size)
35143eb5
PS		 3762{
3763 struct smb2_set_info_req *req;
ba8ca116
RS		 3764 struct kvec *iov = rqst->rq_iov;
3765 unsigned int i, total_len;
3766 int rc;
35143eb5 3767
2fc803ef 3768 rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, (void **) &req, &total_len);
ba8ca116 3769 if (rc)
35143eb5 3770 return rc;
7fb8986e 3771
2fc803ef 3772 req->sync_hdr.ProcessId = cpu_to_le32(pid);
dac95340 3773 req->InfoType = info_type;
35143eb5
PS		 3774 req->FileInfoClass = info_class;
3775 req->PersistentFileId = persistent_fid;
3776 req->VolatileFileId = volatile_fid;
dac95340 3777 req->AdditionalInformation = cpu_to_le32(additional_info);
35143eb5 3778
35143eb5 3779 req->BufferOffset =
2fc803ef 3780 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1);
35143eb5
PS		 3781 req->BufferLength = cpu_to_le32(*size);
3782
35143eb5 3783 memcpy(req->Buffer, *data, *size);
2fc803ef 3784 total_len += *size;
35143eb5
PS		 3785
3786 iov[0].iov_base = (char *)req;
2fc803ef
RS		 3787 /* 1 for Buffer */
3788 iov[0].iov_len = total_len - 1;
35143eb5 3789
ba8ca116 3790 for (i = 1; i < rqst->rq_nvec; i++) {
35143eb5
PS		 3791 le32_add_cpu(&req->BufferLength, size[i]);
3792 iov[i].iov_base = (char *)data[i];
3793 iov[i].iov_len = size[i];
3794 }
3795
ba8ca116
RS		 3796 return 0;
3797}
3798
3799void
3800SMB2_set_info_free(struct smb_rqst *rqst)
3801{
3802 cifs_buf_release(rqst->rq_iov[0].iov_base); /* request */
3803}
3804
3805static int
3806send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
3807 u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
3808 u8 info_type, u32 additional_info, unsigned int num,
3809 void **data, unsigned int *size)
3810{
3811 struct smb_rqst rqst;
3812 struct smb2_set_info_rsp *rsp = NULL;
3813 struct kvec *iov;
3814 struct kvec rsp_iov;
3815 int rc = 0;
3816 int resp_buftype;
3817 struct cifs_ses *ses = tcon->ses;
3818 int flags = 0;
3819
3820 if (!ses || !(ses->server))
3821 return -EIO;
3822
3823 if (!num)
3824 return -EINVAL;
3825
3826 if (smb3_encryption_required(tcon))
3827 flags |= CIFS_TRANSFORM_REQ;
3828
3829 iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL);
3830 if (!iov)
3831 return -ENOMEM;
3832
40eff45b
RS		 3833 memset(&rqst, 0, sizeof(struct smb_rqst));
3834 rqst.rq_iov = iov;
3835 rqst.rq_nvec = num;
3836
ba8ca116
RS		 3837 rc = SMB2_set_info_init(tcon, &rqst, persistent_fid, volatile_fid, pid,
3838 info_class, info_type, additional_info,
3839 data, size);
3840 if (rc) {
3841 kfree(iov);
3842 return rc;
3843 }
3844
3845
40eff45b 3846 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
2fc803ef 3847 &rsp_iov);
ba8ca116 3848 SMB2_set_info_free(&rqst);
da502f7d 3849 rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
35143eb5 3850
eccb4422 3851 if (rc != 0) {
35143eb5 3852 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
eccb4422
SF		 3853 trace_smb3_set_info_err(xid, persistent_fid, tcon->tid,
3854 ses->Suid, info_class, (__u32)info_type, rc);
3855 }
7d3fb24b 3856
35143eb5
PS		 3857 free_rsp_buf(resp_buftype, rsp);
3858 kfree(iov);
3859 return rc;
3860}
3861
c839ff24
PS		 3862int
3863SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
3764cbd1 3864 u64 volatile_fid, u32 pid, __le64 *eof)
c839ff24
PS		 3865{
3866 struct smb2_file_eof_info info;
3867 void *data;
3868 unsigned int size;
3869
3870 info.EndOfFile = *eof;
3871
3872 data = &info;
3873 size = sizeof(struct smb2_file_eof_info);
3874
3764cbd1 3875 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3876 pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE,
3877 0, 1, &data, &size);
c839ff24 3878}
1feeaac7 3879
dac95340
SP		 3880int
3881SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
3882 u64 persistent_fid, u64 volatile_fid,
3883 struct cifs_ntsd *pnntsd, int pacllen, int aclflag)
3884{
3885 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3886 current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag,
3887 1, (void **)&pnntsd, &pacllen);
1feeaac7 3888}
983c88a4 3889
5517554e
RS		 3890int
3891SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
3892 u64 persistent_fid, u64 volatile_fid,
3893 struct smb2_file_full_ea_info *buf, int len)
3894{
3895 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3896 current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE,
3897 0, 1, (void **)&buf, &len);
3898}
3899
983c88a4
PS		 3900int
3901SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
3902 const u64 persistent_fid, const u64 volatile_fid,
3903 __u8 oplock_level)
3904{
40eff45b 3905 struct smb_rqst rqst;
983c88a4 3906 int rc;
0d5a288d 3907 struct smb2_oplock_break *req = NULL;
21ad9487 3908 struct cifs_ses *ses = tcon->ses;
7fb8986e 3909 int flags = CIFS_OBREAK_OP;
21ad9487
RS		 3910 unsigned int total_len;
3911 struct kvec iov[1];
3912 struct kvec rsp_iov;
3913 int resp_buf_type;
983c88a4 3914
f96637be 3915 cifs_dbg(FYI, "SMB2_oplock_break\n");
21ad9487
RS		 3916 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
3917 &total_len);
983c88a4
PS		 3918 if (rc)
3919 return rc;
3920
5a77e75f 3921 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3922 flags |= CIFS_TRANSFORM_REQ;
3923
983c88a4
PS		 3924 req->VolatileFid = volatile_fid;
3925 req->PersistentFid = persistent_fid;
3926 req->OplockLevel = oplock_level;
21ad9487 3927 req->sync_hdr.CreditRequest = cpu_to_le16(1);
983c88a4 3928
21ad9487
RS		 3929 flags |= CIFS_NO_RESP;
3930
3931 iov[0].iov_base = (char *)req;
3932 iov[0].iov_len = total_len;
3933
40eff45b
RS		 3934 memset(&rqst, 0, sizeof(struct smb_rqst));
3935 rqst.rq_iov = iov;
3936 rqst.rq_nvec = 1;
3937
3938 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
da502f7d 3939 cifs_small_buf_release(req);
983c88a4
PS		 3940
3941 if (rc) {
3942 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 3943 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
983c88a4
PS		 3944 }
3945
3946 return rc;
3947}
6fc05c25 3948
730928c8
RS		 3949void
3950smb2_copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
3951 struct kstatfs *kst)
6fc05c25
PS		 3952{
3953 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
3954 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
3955 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
42bec214
SP		 3956 kst->f_bfree = kst->f_bavail =
3957 le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
6fc05c25
PS		 3958 return;
3959}
3960
2d304217
SF		 3961static void
3962copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO *response_data,
3963 struct kstatfs *kst)
3964{
3965 kst->f_bsize = le32_to_cpu(response_data->BlockSize);
3966 kst->f_blocks = le64_to_cpu(response_data->TotalBlocks);
3967 kst->f_bfree = le64_to_cpu(response_data->BlocksAvail);
3968 if (response_data->UserBlocksAvail == cpu_to_le64(-1))
3969 kst->f_bavail = kst->f_bfree;
3970 else
3971 kst->f_bavail = le64_to_cpu(response_data->UserBlocksAvail);
3972 if (response_data->TotalFileNodes != cpu_to_le64(-1))
3973 kst->f_files = le64_to_cpu(response_data->TotalFileNodes);
3974 if (response_data->FreeFileNodes != cpu_to_le64(-1))
3975 kst->f_ffree = le64_to_cpu(response_data->FreeFileNodes);
3976
3977 return;
3978}
2d304217 3979
6fc05c25
PS		 3980static int
3981build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
3982 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
3983{
c0953f2e 3984 struct TCP_Server_Info *server;
6fc05c25
PS		 3985 int rc;
3986 struct smb2_query_info_req *req;
b2fb7fec 3987 unsigned int total_len;
6fc05c25 3988
f96637be 3989 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
6fc05c25
PS		 3990
3991 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
3992 return -EIO;
3993
c0953f2e
GS		 3994 server = tcon->ses->server;
3995
b2fb7fec
RS		 3996 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
3997 &total_len);
6fc05c25
PS		 3998 if (rc)
3999 return rc;
4000
4001 req->InfoType = SMB2_O_INFO_FILESYSTEM;
4002 req->FileInfoClass = level;
4003 req->PersistentFileId = persistent_fid;
4004 req->VolatileFileId = volatile_fid;
b2fb7fec 4005 /* 1 for pad */
6fc05c25 4006 req->InputBufferOffset =
b2fb7fec 4007 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1);
6fc05c25 4008 req->OutputBufferLength = cpu_to_le32(
1fc6ad2f 4009 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1);
6fc05c25
PS		 4010
4011 iov->iov_base = (char *)req;
b2fb7fec 4012 iov->iov_len = total_len;
6fc05c25
PS		 4013 return 0;
4014}
4015
2d304217
SF		 4016int
4017SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon,
4018 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
4019{
4020 struct smb_rqst rqst;
4021 struct smb2_query_info_rsp *rsp = NULL;
4022 struct kvec iov;
4023 struct kvec rsp_iov;
4024 int rc = 0;
4025 int resp_buftype;
4026 struct cifs_ses *ses = tcon->ses;
4027 FILE_SYSTEM_POSIX_INFO *info = NULL;
4028 int flags = 0;
4029
4030 rc = build_qfs_info_req(&iov, tcon, FS_POSIX_INFORMATION,
4031 sizeof(FILE_SYSTEM_POSIX_INFO),
4032 persistent_fid, volatile_fid);
4033 if (rc)
4034 return rc;
4035
4036 if (smb3_encryption_required(tcon))
4037 flags |= CIFS_TRANSFORM_REQ;
4038
4039 memset(&rqst, 0, sizeof(struct smb_rqst));
4040 rqst.rq_iov = &iov;
4041 rqst.rq_nvec = 1;
4042
4043 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
4044 cifs_small_buf_release(iov.iov_base);
4045 if (rc) {
4046 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
4047 goto posix_qfsinf_exit;
4048 }
4049 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
4050
4051 info = (FILE_SYSTEM_POSIX_INFO *)(
4052 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
730928c8
RS		 4053 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
4054 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
4055 sizeof(FILE_SYSTEM_POSIX_INFO));
2d304217
SF		 4056 if (!rc)
4057 copy_posix_fs_info_to_kstatfs(info, fsdata);
4058
4059posix_qfsinf_exit:
4060 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
4061 return rc;
4062}
2d304217 4063
6fc05c25
PS		 4064int
4065SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
4066 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
4067{
40eff45b 4068 struct smb_rqst rqst;
6fc05c25
PS		 4069 struct smb2_query_info_rsp *rsp = NULL;
4070 struct kvec iov;
da502f7d 4071 struct kvec rsp_iov;
6fc05c25
PS		 4072 int rc = 0;
4073 int resp_buftype;
4074 struct cifs_ses *ses = tcon->ses;
4075 struct smb2_fs_full_size_info *info = NULL;
7fb8986e 4076 int flags = 0;
6fc05c25
PS		 4077
4078 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
4079 sizeof(struct smb2_fs_full_size_info),
4080 persistent_fid, volatile_fid);
4081 if (rc)
4082 return rc;
4083
5a77e75f 4084 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4085 flags |= CIFS_TRANSFORM_REQ;
4086
40eff45b
RS		 4087 memset(&rqst, 0, sizeof(struct smb_rqst));
4088 rqst.rq_iov = &iov;
4089 rqst.rq_nvec = 1;
4090
4091 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 4092 cifs_small_buf_release(iov.iov_base);
6fc05c25
PS		 4093 if (rc) {
4094 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
34f62640 4095 goto qfsinf_exit;
6fc05c25 4096 }
da502f7d 4097 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
6fc05c25 4098
1fc6ad2f 4099 info = (struct smb2_fs_full_size_info *)(
49f466bd 4100 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
730928c8
RS		 4101 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
4102 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
4103 sizeof(struct smb2_fs_full_size_info));
6fc05c25 4104 if (!rc)
730928c8 4105 smb2_copy_fs_info_to_kstatfs(info, fsdata);
6fc05c25 4106
34f62640 4107qfsinf_exit:
da502f7d 4108 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
34f62640
SF		 4109 return rc;
4110}
4111
4112int
4113SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2167114c 4114 u64 persistent_fid, u64 volatile_fid, int level)
34f62640 4115{
40eff45b 4116 struct smb_rqst rqst;
34f62640
SF		 4117 struct smb2_query_info_rsp *rsp = NULL;
4118 struct kvec iov;
da502f7d 4119 struct kvec rsp_iov;
34f62640 4120 int rc = 0;
2167114c 4121 int resp_buftype, max_len, min_len;
34f62640
SF		 4122 struct cifs_ses *ses = tcon->ses;
4123 unsigned int rsp_len, offset;
7fb8986e 4124 int flags = 0;
34f62640 4125
2167114c
SF		 4126 if (level == FS_DEVICE_INFORMATION) {
4127 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
4128 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
4129 } else if (level == FS_ATTRIBUTE_INFORMATION) {
4130 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
4131 min_len = MIN_FS_ATTR_INFO_SIZE;
af6a12ea
SF		 4132 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
4133 max_len = sizeof(struct smb3_fs_ss_info);
4134 min_len = sizeof(struct smb3_fs_ss_info);
21ba3845
SF		 4135 } else if (level == FS_VOLUME_INFORMATION) {
4136 max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN;
4137 min_len = sizeof(struct smb3_fs_vol_info);
2167114c 4138 } else {
af6a12ea 4139 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2167114c
SF		 4140 return -EINVAL;
4141 }
4142
4143 rc = build_qfs_info_req(&iov, tcon, level, max_len,
34f62640
SF		 4144 persistent_fid, volatile_fid);
4145 if (rc)
4146 return rc;
4147
5a77e75f 4148 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4149 flags |= CIFS_TRANSFORM_REQ;
4150
40eff45b
RS		 4151 memset(&rqst, 0, sizeof(struct smb_rqst));
4152 rqst.rq_iov = &iov;
4153 rqst.rq_nvec = 1;
4154
4155 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
da502f7d 4156 cifs_small_buf_release(iov.iov_base);
34f62640
SF		 4157 if (rc) {
4158 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
4159 goto qfsattr_exit;
4160 }
da502f7d 4161 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
34f62640
SF		 4162
4163 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
4164 offset = le16_to_cpu(rsp->OutputBufferOffset);
730928c8 4165 rc = smb2_validate_iov(offset, rsp_len, &rsp_iov, min_len);
2167114c
SF		 4166 if (rc)
4167 goto qfsattr_exit;
4168
4169 if (level == FS_ATTRIBUTE_INFORMATION)
1fc6ad2f 4170 memcpy(&tcon->fsAttrInfo, offset
49f466bd 4171 + (char *)rsp, min_t(unsigned int,
2167114c
SF		 4172 rsp_len, max_len));
4173 else if (level == FS_DEVICE_INFORMATION)
1fc6ad2f 4174 memcpy(&tcon->fsDevInfo, offset
49f466bd 4175 + (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO));
af6a12ea
SF		 4176 else if (level == FS_SECTOR_SIZE_INFORMATION) {
4177 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
1fc6ad2f 4178 (offset + (char *)rsp);
af6a12ea
SF		 4179 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
4180 tcon->perf_sector_size =
4181 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
21ba3845
SF		 4182 } else if (level == FS_VOLUME_INFORMATION) {
4183 struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *)
4184 (offset + (char *)rsp);
4185 tcon->vol_serial_number = vol_info->VolumeSerialNumber;
4186 tcon->vol_create_time = vol_info->VolumeCreationTime;
af6a12ea 4187 }
34f62640
SF		 4188
4189qfsattr_exit:
da502f7d 4190 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
6fc05c25
PS		 4191 return rc;
4192}
f7ba7fe6
PS		 4193
4194int
4195smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
4196 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
4197 const __u32 num_lock, struct smb2_lock_element *buf)
4198{
40eff45b 4199 struct smb_rqst rqst;
f7ba7fe6
PS		 4200 int rc = 0;
4201 struct smb2_lock_req *req = NULL;
4202 struct kvec iov[2];
da502f7d 4203 struct kvec rsp_iov;
f7ba7fe6
PS		 4204 int resp_buf_type;
4205 unsigned int count;
7fb8986e 4206 int flags = CIFS_NO_RESP;
ced93679 4207 unsigned int total_len;
f7ba7fe6 4208
f96637be 4209 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
f7ba7fe6 4210
ced93679 4211 rc = smb2_plain_req_init(SMB2_LOCK, tcon, (void **) &req, &total_len);
f7ba7fe6
PS		 4212 if (rc)
4213 return rc;
4214
5a77e75f 4215 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4216 flags |= CIFS_TRANSFORM_REQ;
4217
ced93679 4218 req->sync_hdr.ProcessId = cpu_to_le32(pid);
f7ba7fe6
PS		 4219 req->LockCount = cpu_to_le16(num_lock);
4220
4221 req->PersistentFileId = persist_fid;
4222 req->VolatileFileId = volatile_fid;
4223
4224 count = num_lock * sizeof(struct smb2_lock_element);
f7ba7fe6
PS		 4225
4226 iov[0].iov_base = (char *)req;
ced93679 4227 iov[0].iov_len = total_len - sizeof(struct smb2_lock_element);
f7ba7fe6
PS		 4228 iov[1].iov_base = (char *)buf;
4229 iov[1].iov_len = count;
4230
4231 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
40eff45b
RS		 4232
4233 memset(&rqst, 0, sizeof(struct smb_rqst));
4234 rqst.rq_iov = iov;
4235 rqst.rq_nvec = 2;
4236
4237 rc = cifs_send_recv(xid, tcon->ses, &rqst, &resp_buf_type, flags,
ced93679 4238 &rsp_iov);
da502f7d 4239 cifs_small_buf_release(req);
f7ba7fe6 4240 if (rc) {
f96637be 4241 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
f7ba7fe6 4242 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
eccb4422
SF		 4243 trace_smb3_lock_err(xid, persist_fid, tcon->tid,
4244 tcon->ses->Suid, rc);
f7ba7fe6
PS		 4245 }
4246
4247 return rc;
4248}
4249
4250int
4251SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
4252 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
4253 const __u64 length, const __u64 offset, const __u32 lock_flags,
4254 const bool wait)
4255{
4256 struct smb2_lock_element lock;
4257
4258 lock.Offset = cpu_to_le64(offset);
4259 lock.Length = cpu_to_le64(length);
4260 lock.Flags = cpu_to_le32(lock_flags);
4261 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
4262 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
4263
4264 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
4265}
0822f514
PS		 4266
4267int
4268SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
4269 __u8 *lease_key, const __le32 lease_state)
4270{
40eff45b 4271 struct smb_rqst rqst;
0822f514
PS		 4272 int rc;
4273 struct smb2_lease_ack *req = NULL;
8eb7998e 4274 struct cifs_ses *ses = tcon->ses;
7fb8986e 4275 int flags = CIFS_OBREAK_OP;
8eb7998e
RS		 4276 unsigned int total_len;
4277 struct kvec iov[1];
4278 struct kvec rsp_iov;
4279 int resp_buf_type;
179e44d4
SF		 4280 __u64 *please_key_high;
4281 __u64 *please_key_low;
0822f514 4282
f96637be 4283 cifs_dbg(FYI, "SMB2_lease_break\n");
8eb7998e
RS		 4284 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
4285 &total_len);
0822f514
PS		 4286 if (rc)
4287 return rc;
4288
5a77e75f 4289 if (smb3_encryption_required(tcon))
7fb8986e
PS		 4290 flags |= CIFS_TRANSFORM_REQ;
4291
8eb7998e 4292 req->sync_hdr.CreditRequest = cpu_to_le16(1);
0822f514 4293 req->StructureSize = cpu_to_le16(36);
8eb7998e 4294 total_len += 12;
0822f514
PS		 4295
4296 memcpy(req->LeaseKey, lease_key, 16);
4297 req->LeaseState = lease_state;
4298
8eb7998e
RS		 4299 flags |= CIFS_NO_RESP;
4300
4301 iov[0].iov_base = (char *)req;
4302 iov[0].iov_len = total_len;
4303
40eff45b
RS		 4304 memset(&rqst, 0, sizeof(struct smb_rqst));
4305 rqst.rq_iov = iov;
4306 rqst.rq_nvec = 1;
4307
4308 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
da502f7d 4309 cifs_small_buf_release(req);
0822f514 4310
179e44d4
SF		 4311 please_key_low = (__u64 *)req->LeaseKey;
4312 please_key_high = (__u64 *)(req->LeaseKey+8);
0822f514
PS		 4313 if (rc) {
4314 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
179e44d4
SF		 4315 trace_smb3_lease_err(le32_to_cpu(lease_state), tcon->tid,
4316 ses->Suid, *please_key_low, *please_key_high, rc);
f96637be 4317 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
179e44d4
SF		 4318 } else
4319 trace_smb3_lease_done(le32_to_cpu(lease_state), tcon->tid,
4320 ses->Suid, *please_key_low, *please_key_high);
0822f514
PS		 4321
4322 return rc;
4323}
Linux 6.x block layer and io_uring tree(s)