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smb3: Add posix create context for smb3.11 posix mounts
[linux-block.git] / fs / cifs / smb2pdu.c
CommitLineData
ec2e4523
PS		 1/*
2 * fs/cifs/smb2pdu.c
3 *
2b80d049 4 * Copyright (C) International Business Machines Corp., 2009, 2013
ec2e4523
PS		 5 * Etersoft, 2012
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
8 *
9 * Contains the routines for constructing the SMB2 PDUs themselves
10 *
11 * This library is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published
13 * by the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
15 *
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
19 * the GNU Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 */
25
26 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
27 /* Note that there are handle based routines which must be */
28 /* treated slightly differently for reconnection purposes since we never */
29 /* want to reuse a stale file handle and only the caller knows the file info */
30
31#include <linux/fs.h>
32#include <linux/kernel.h>
33#include <linux/vfs.h>
09a4707e 34#include <linux/task_io_accounting_ops.h>
ec2e4523 35#include <linux/uaccess.h>
c6e970a0 36#include <linux/uuid.h>
33319141 37#include <linux/pagemap.h>
ec2e4523
PS		 38#include <linux/xattr.h>
39#include "smb2pdu.h"
40#include "cifsglob.h"
41#include "cifsacl.h"
42#include "cifsproto.h"
43#include "smb2proto.h"
44#include "cifs_unicode.h"
45#include "cifs_debug.h"
46#include "ntlmssp.h"
47#include "smb2status.h"
09a4707e 48#include "smb2glob.h"
d324f08d 49#include "cifspdu.h"
ceb1b0b9 50#include "cifs_spnego.h"
db223a59 51#include "smbdirect.h"
eccb4422 52#include "trace.h"
ec2e4523
PS		 53
54/*
55 * The following table defines the expected "StructureSize" of SMB2 requests
56 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
57 *
58 * Note that commands are defined in smb2pdu.h in le16 but the array below is
59 * indexed by command in host byte order.
60 */
61static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
62 /* SMB2_NEGOTIATE */ 36,
63 /* SMB2_SESSION_SETUP */ 25,
64 /* SMB2_LOGOFF */ 4,
65 /* SMB2_TREE_CONNECT */ 9,
66 /* SMB2_TREE_DISCONNECT */ 4,
67 /* SMB2_CREATE */ 57,
68 /* SMB2_CLOSE */ 24,
69 /* SMB2_FLUSH */ 24,
70 /* SMB2_READ */ 49,
71 /* SMB2_WRITE */ 49,
72 /* SMB2_LOCK */ 48,
73 /* SMB2_IOCTL */ 57,
74 /* SMB2_CANCEL */ 4,
75 /* SMB2_ECHO */ 4,
76 /* SMB2_QUERY_DIRECTORY */ 33,
77 /* SMB2_CHANGE_NOTIFY */ 32,
78 /* SMB2_QUERY_INFO */ 41,
79 /* SMB2_SET_INFO */ 33,
80 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
81};
82
5a77e75f 83static int smb3_encryption_required(const struct cifs_tcon *tcon)
7fb8986e 84{
ae6f8dd4
PS		 85 if (!tcon)
86 return 0;
7fb8986e
PS		 87 if ((tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
88 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
89 return 1;
ae6f8dd4
PS		 90 if (tcon->seal &&
91 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
92 return 1;
7fb8986e
PS		 93 return 0;
94}
ec2e4523
PS		 95
96static void
cb200bd6 97smb2_hdr_assemble(struct smb2_sync_hdr *shdr, __le16 smb2_cmd,
ec2e4523
PS		 98 const struct cifs_tcon *tcon)
99{
31473fc4
PS		 100 shdr->ProtocolId = SMB2_PROTO_NUMBER;
101 shdr->StructureSize = cpu_to_le16(64);
102 shdr->Command = smb2_cmd;
7d414f39
RL		 103 if (tcon && tcon->ses && tcon->ses->server) {
104 struct TCP_Server_Info *server = tcon->ses->server;
105
106 spin_lock(&server->req_lock);
107 /* Request up to 2 credits but don't go over the limit. */
141891f4 108 if (server->credits >= server->max_credits)
31473fc4 109 shdr->CreditRequest = cpu_to_le16(0);
7d414f39 110 else
31473fc4 111 shdr->CreditRequest = cpu_to_le16(
141891f4 112 min_t(int, server->max_credits -
7d414f39
RL		 113 server->credits, 2));
114 spin_unlock(&server->req_lock);
115 } else {
31473fc4 116 shdr->CreditRequest = cpu_to_le16(2);
7d414f39 117 }
31473fc4 118 shdr->ProcessId = cpu_to_le32((__u16)current->tgid);
ec2e4523
PS		 119
120 if (!tcon)
121 goto out;
122
2b80d049
SF		 123 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
124 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
1dc92c45 125 if ((tcon->ses) && (tcon->ses->server) &&
84ceeb96 126 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
31473fc4 127 shdr->CreditCharge = cpu_to_le16(1);
2b80d049
SF		 128 /* else CreditCharge MBZ */
129
31473fc4 130 shdr->TreeId = tcon->tid;
ec2e4523
PS		 131 /* Uid is not converted */
132 if (tcon->ses)
31473fc4 133 shdr->SessionId = tcon->ses->Suid;
f87ab88b
SF		 134
135 /*
136 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
137 * to pass the path on the Open SMB prefixed by \\server\share.
138 * Not sure when we would need to do the augmented path (if ever) and
139 * setting this flag breaks the SMB2 open operation since it is
140 * illegal to send an empty path name (without \\server\share prefix)
141 * when the DFS flag is set in the SMB open header. We could
142 * consider setting the flag on all operations other than open
143 * but it is safer to net set it for now.
144 */
145/* if (tcon->share_flags & SHI1005_FLAGS_DFS)
31473fc4 146 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
f87ab88b 147
7fb8986e 148 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign &&
5a77e75f 149 !smb3_encryption_required(tcon))
31473fc4 150 shdr->Flags |= SMB2_FLAGS_SIGNED;
ec2e4523 151out:
ec2e4523
PS		 152 return;
153}
154
155static int
156smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
157{
158 int rc = 0;
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)
169 return rc;
170
171 if (smb2_command == SMB2_TREE_CONNECT)
172 return rc;
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
215 wait_event_interruptible_timeout(server->response_q,
216 (server->tcpStatus != CifsNeedReconnect), 10 * HZ);
217
218 /* are we still trying to reconnect? */
219 if (server->tcpStatus != CifsNeedReconnect)
220 break;
221
222 /*
223 * on "soft" mounts we wait once. Hard mounts keep
224 * retrying until process is killed or server comes
225 * back on-line
226 */
227 if (!tcon->retry) {
f96637be 228 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
aa24d1e9
PS		 229 return -EHOSTDOWN;
230 }
231 }
232
233 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
234 return rc;
235
236 nls_codepage = load_nls_default();
237
238 /*
239 * need to prevent multiple threads trying to simultaneously reconnect
240 * the same SMB session
241 */
242 mutex_lock(&tcon->ses->session_mutex);
76e75270
SC		 243
244 /*
245 * Recheck after acquire mutex. If another thread is negotiating
246 * and the server never sends an answer the socket will be closed
247 * and tcpStatus set to reconnect.
248 */
249 if (server->tcpStatus == CifsNeedReconnect) {
250 rc = -EHOSTDOWN;
251 mutex_unlock(&tcon->ses->session_mutex);
252 goto out;
253 }
254
aa24d1e9
PS		 255 rc = cifs_negotiate_protocol(0, tcon->ses);
256 if (!rc && tcon->ses->need_reconnect)
257 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
258
259 if (rc || !tcon->need_reconnect) {
260 mutex_unlock(&tcon->ses->session_mutex);
261 goto out;
262 }
263
264 cifs_mark_open_files_invalid(tcon);
96a988ff
PS		 265 if (tcon->use_persistent)
266 tcon->need_reopen_files = true;
52ace1ef 267
aa24d1e9
PS		 268 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
269 mutex_unlock(&tcon->ses->session_mutex);
52ace1ef 270
f96637be 271 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
c318e6c2
SF		 272 if (rc) {
273 /* If sess reconnected but tcon didn't, something strange ... */
274 printk_once(KERN_WARNING "reconnect tcon failed rc = %d\n", rc);
aa24d1e9 275 goto out;
c318e6c2 276 }
96a988ff
PS		 277
278 if (smb2_command != SMB2_INTERNAL_CMD)
279 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
280
aa24d1e9 281 atomic_inc(&tconInfoReconnectCount);
aa24d1e9
PS		 282out:
283 /*
284 * Check if handle based operation so we know whether we can continue
285 * or not without returning to caller to reset file handle.
286 */
287 /*
288 * BB Is flush done by server on drop of tcp session? Should we special
289 * case it and skip above?
290 */
291 switch (smb2_command) {
292 case SMB2_FLUSH:
293 case SMB2_READ:
294 case SMB2_WRITE:
295 case SMB2_LOCK:
296 case SMB2_IOCTL:
297 case SMB2_QUERY_DIRECTORY:
298 case SMB2_CHANGE_NOTIFY:
299 case SMB2_QUERY_INFO:
300 case SMB2_SET_INFO:
4772c795 301 rc = -EAGAIN;
aa24d1e9
PS		 302 }
303 unload_nls(nls_codepage);
ec2e4523
PS		 304 return rc;
305}
306
cb200bd6
PS		 307static void
308fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, void *buf,
309 unsigned int *total_len)
310{
311 struct smb2_sync_pdu *spdu = (struct smb2_sync_pdu *)buf;
312 /* lookup word count ie StructureSize from table */
313 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)];
314
315 /*
316 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
317 * largest operations (Create)
318 */
319 memset(buf, 0, 256);
320
321 smb2_hdr_assemble(&spdu->sync_hdr, smb2_command, tcon);
322 spdu->StructureSize2 = cpu_to_le16(parmsize);
323
324 *total_len = parmsize + sizeof(struct smb2_sync_hdr);
325}
326
ec2e4523
PS		 327/*
328 * Allocate and return pointer to an SMB request hdr, and set basic
329 * SMB information in the SMB header. If the return code is zero, this
305428ac 330 * function must have filled in request_buf pointer.
ec2e4523
PS		 331 */
332static int
305428ac
RS		 333smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
334 void **request_buf, unsigned int *total_len)
ec2e4523 335{
cb200bd6 336 int rc;
ec2e4523
PS		 337
338 rc = smb2_reconnect(smb2_command, tcon);
339 if (rc)
340 return rc;
341
342 /* BB eventually switch this to SMB2 specific small buf size */
343 *request_buf = cifs_small_buf_get();
344 if (*request_buf == NULL) {
345 /* BB should we add a retry in here if not a writepage? */
346 return -ENOMEM;
347 }
348
305428ac
RS		 349 fill_small_buf(smb2_command, tcon,
350 (struct smb2_sync_hdr *)(*request_buf),
351 total_len);
ec2e4523
PS		 352
353 if (tcon != NULL) {
354#ifdef CONFIG_CIFS_STATS2
ec2e4523
PS		 355 uint16_t com_code = le16_to_cpu(smb2_command);
356 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
ec2e4523
PS		 357#endif
358 cifs_stats_inc(&tcon->num_smbs_sent);
359 }
360
361 return rc;
362}
363
ebb3a9d4 364#ifdef CONFIG_CIFS_SMB311
13cacea7
RS		 365/* offset is sizeof smb2_negotiate_req but rounded up to 8 bytes */
366#define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) */
ebb3a9d4
SF		 367
368
369#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
370#define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
fcef0db6 371#define SMB2_POSIX_EXTENSIONS_AVAILABLE cpu_to_le16(0x100)
ebb3a9d4
SF		 372
373static void
374build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
375{
376 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
377 pneg_ctxt->DataLength = cpu_to_le16(38);
378 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
379 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
380 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
381 pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
382}
383
384static void
385build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
386{
387 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
23657ad7
SF		 388 pneg_ctxt->DataLength = cpu_to_le16(4); /* Cipher Count + le16 cipher */
389 pneg_ctxt->CipherCount = cpu_to_le16(1);
390/* pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;*/ /* not supported yet */
391 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_CCM;
ebb3a9d4
SF		 392}
393
fcef0db6
SF		 394static void
395build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
396{
397 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
398 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
399}
400
ebb3a9d4 401static void
13cacea7
RS		 402assemble_neg_contexts(struct smb2_negotiate_req *req,
403 unsigned int *total_len)
ebb3a9d4 404{
13cacea7 405 char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT;
fcef0db6 406 unsigned int ctxt_len;
ebb3a9d4 407
fcef0db6 408 *total_len += 2; /* Add 2 due to round to 8 byte boundary for 1st ctxt */
ebb3a9d4 409 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
fcef0db6
SF		 410 ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_preauth_neg_context), 8) * 8;
411 *total_len += ctxt_len;
412 pneg_ctxt += ctxt_len;
13cacea7 413
ebb3a9d4 414 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
fcef0db6
SF		 415 ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_encryption_neg_context), 8) * 8;
416 *total_len += ctxt_len;
417 pneg_ctxt += ctxt_len;
418
419 build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
420 *total_len += sizeof(struct smb2_posix_neg_context);
13cacea7 421
fcef0db6
SF		 422 req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
423 req->NegotiateContextCount = cpu_to_le16(3);
ebb3a9d4 424}
5100d8a3
SF		 425
426static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt)
427{
428 unsigned int len = le16_to_cpu(ctxt->DataLength);
429
430 /* If invalid preauth context warn but use what we requested, SHA-512 */
431 if (len < MIN_PREAUTH_CTXT_DATA_LEN) {
432 printk_once(KERN_WARNING "server sent bad preauth context\n");
433 return;
434 }
435 if (le16_to_cpu(ctxt->HashAlgorithmCount) != 1)
436 printk_once(KERN_WARNING "illegal SMB3 hash algorithm count\n");
437 if (ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
438 printk_once(KERN_WARNING "unknown SMB3 hash algorithm\n");
439}
440
441static int decode_encrypt_ctx(struct TCP_Server_Info *server,
442 struct smb2_encryption_neg_context *ctxt)
443{
444 unsigned int len = le16_to_cpu(ctxt->DataLength);
445
446 cifs_dbg(FYI, "decode SMB3.11 encryption neg context of len %d\n", len);
447 if (len < MIN_ENCRYPT_CTXT_DATA_LEN) {
448 printk_once(KERN_WARNING "server sent bad crypto ctxt len\n");
449 return -EINVAL;
450 }
451
452 if (le16_to_cpu(ctxt->CipherCount) != 1) {
453 printk_once(KERN_WARNING "illegal SMB3.11 cipher count\n");
454 return -EINVAL;
455 }
456 cifs_dbg(FYI, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt->Ciphers[0]));
457 if ((ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_CCM) &&
458 (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_GCM)) {
459 printk_once(KERN_WARNING "invalid SMB3.11 cipher returned\n");
460 return -EINVAL;
461 }
462 server->cipher_type = ctxt->Ciphers[0];
23657ad7 463 server->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
5100d8a3
SF		 464 return 0;
465}
466
467static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp,
468 struct TCP_Server_Info *server)
469{
470 struct smb2_neg_context *pctx;
471 unsigned int offset = le32_to_cpu(rsp->NegotiateContextOffset);
472 unsigned int ctxt_cnt = le16_to_cpu(rsp->NegotiateContextCount);
473 unsigned int len_of_smb = be32_to_cpu(rsp->hdr.smb2_buf_length);
474 unsigned int len_of_ctxts, i;
475 int rc = 0;
476
477 cifs_dbg(FYI, "decoding %d negotiate contexts\n", ctxt_cnt);
478 if (len_of_smb <= offset) {
479 cifs_dbg(VFS, "Invalid response: negotiate context offset\n");
480 return -EINVAL;
481 }
482
483 len_of_ctxts = len_of_smb - offset;
484
485 for (i = 0; i < ctxt_cnt; i++) {
486 int clen;
487 /* check that offset is not beyond end of SMB */
488 if (len_of_ctxts == 0)
489 break;
490
491 if (len_of_ctxts < sizeof(struct smb2_neg_context))
492 break;
493
0d4b46ba
SF		 494 pctx = (struct smb2_neg_context *)(offset +
495 server->vals->header_preamble_size + (char *)rsp);
5100d8a3
SF		 496 clen = le16_to_cpu(pctx->DataLength);
497 if (clen > len_of_ctxts)
498 break;
499
500 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES)
501 decode_preauth_context(
502 (struct smb2_preauth_neg_context *)pctx);
503 else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES)
504 rc = decode_encrypt_ctx(server,
505 (struct smb2_encryption_neg_context *)pctx);
fcef0db6
SF		 506 else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE)
507 server->posix_ext_supported = true;
5100d8a3
SF		 508 else
509 cifs_dbg(VFS, "unknown negcontext of type %d ignored\n",
510 le16_to_cpu(pctx->ContextType));
511
512 if (rc)
513 break;
514 /* offsets must be 8 byte aligned */
515 clen = (clen + 7) & ~0x7;
516 offset += clen + sizeof(struct smb2_neg_context);
517 len_of_ctxts -= clen;
518 }
519 return rc;
520}
521
ce558b0e
SF		 522static struct create_posix *
523create_posix_buf(umode_t mode)
524{
525 struct create_posix *buf;
526
527 buf = kzalloc(sizeof(struct create_posix),
528 GFP_KERNEL);
529 if (!buf)
530 return NULL;
531
532 buf->ccontext.DataOffset =
533 cpu_to_le16(offsetof(struct create_posix, Mode));
534 buf->ccontext.DataLength = cpu_to_le32(4);
535 buf->ccontext.NameOffset =
536 cpu_to_le16(offsetof(struct create_posix, Name));
537 buf->ccontext.NameLength = cpu_to_le16(16);
538
539 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
540 buf->Name[0] = 0x93;
541 buf->Name[1] = 0xAD;
542 buf->Name[2] = 0x25;
543 buf->Name[3] = 0x50;
544 buf->Name[4] = 0x9C;
545 buf->Name[5] = 0xB4;
546 buf->Name[6] = 0x11;
547 buf->Name[7] = 0xE7;
548 buf->Name[8] = 0xB4;
549 buf->Name[9] = 0x23;
550 buf->Name[10] = 0x83;
551 buf->Name[11] = 0xDE;
552 buf->Name[12] = 0x96;
553 buf->Name[13] = 0x8B;
554 buf->Name[14] = 0xCD;
555 buf->Name[15] = 0x7C;
556 buf->Mode = cpu_to_le32(mode);
557 cifs_dbg(FYI, "mode on posix create 0%o", mode);
558 return buf;
559}
560
561static int
562add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode)
563{
564 struct smb2_create_req *req = iov[0].iov_base;
565 unsigned int num = *num_iovec;
566
567 iov[num].iov_base = create_posix_buf(mode);
568 if (iov[num].iov_base == NULL)
569 return -ENOMEM;
570 iov[num].iov_len = sizeof(struct create_posix);
571 if (!req->CreateContextsOffset)
572 req->CreateContextsOffset = cpu_to_le32(
573 sizeof(struct smb2_create_req) +
574 iov[num - 1].iov_len);
575 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_posix));
576 *num_iovec = num + 1;
577 return 0;
578}
579
ebb3a9d4 580#else
13cacea7
RS		 581static void assemble_neg_contexts(struct smb2_negotiate_req *req,
582 unsigned int *total_len)
ebb3a9d4
SF		 583{
584 return;
585}
586#endif /* SMB311 */
587
ec2e4523
PS		 588/*
589 *
590 * SMB2 Worker functions follow:
591 *
592 * The general structure of the worker functions is:
593 * 1) Call smb2_init (assembles SMB2 header)
594 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
595 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
596 * 4) Decode SMB2 command specific fields in the fixed length area
597 * 5) Decode variable length data area (if any for this SMB2 command type)
598 * 6) Call free smb buffer
599 * 7) return
600 *
601 */
602
603int
604SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
605{
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;
8bd68c6e
AA		 630#ifdef CONFIG_CIFS_SMB311
631 memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
632 memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
633#endif
ec2e4523 634
9764c02f
SF		 635 if (strcmp(ses->server->vals->version_string,
636 SMB3ANY_VERSION_STRING) == 0) {
637 req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
638 req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
639 req->DialectCount = cpu_to_le16(2);
13cacea7 640 total_len += 4;
9764c02f
SF		 641 } else if (strcmp(ses->server->vals->version_string,
642 SMBDEFAULT_VERSION_STRING) == 0) {
643 req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
644 req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
645 req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
646 req->DialectCount = cpu_to_le16(3);
13cacea7 647 total_len += 6;
9764c02f
SF		 648 } else {
649 /* otherwise send specific dialect */
650 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
651 req->DialectCount = cpu_to_le16(1);
13cacea7 652 total_len += 2;
9764c02f 653 }
ec2e4523
PS		 654
655 /* only one of SMB2 signing flags may be set in SMB2 request */
38d77c50 656 if (ses->sign)
9cd2e62c 657 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
38d77c50 658 else if (global_secflags & CIFSSEC_MAY_SIGN)
9cd2e62c 659 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
38d77c50
JL		 660 else
661 req->SecurityMode = 0;
ec2e4523 662
e4aa25e7 663 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
ec2e4523 664
3c5f9be1
SF		 665 /* ClientGUID must be zero for SMB2.02 dialect */
666 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
667 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
ebb3a9d4 668 else {
3c5f9be1
SF		 669 memcpy(req->ClientGUID, server->client_guid,
670 SMB2_CLIENT_GUID_SIZE);
ebb3a9d4 671 if (ses->server->vals->protocol_id == SMB311_PROT_ID)
13cacea7 672 assemble_neg_contexts(req, &total_len);
ebb3a9d4 673 }
ec2e4523 674 iov[0].iov_base = (char *)req;
13cacea7 675 iov[0].iov_len = total_len;
ec2e4523 676
13cacea7 677 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 678 cifs_small_buf_release(req);
679 rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base;
ec2e4523
PS		 680 /*
681 * No tcon so can't do
682 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
683 */
7e682f76
SF		 684 if (rc == -EOPNOTSUPP) {
685 cifs_dbg(VFS, "Dialect not supported by server. Consider "
9764c02f 686 "specifying vers=1.0 or vers=2.0 on mount for accessing"
7e682f76
SF		 687 " older servers\n");
688 goto neg_exit;
689 } else if (rc != 0)
ec2e4523
PS		 690 goto neg_exit;
691
9764c02f
SF		 692 if (strcmp(ses->server->vals->version_string,
693 SMB3ANY_VERSION_STRING) == 0) {
694 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
695 cifs_dbg(VFS,
696 "SMB2 dialect returned but not requested\n");
697 return -EIO;
698 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
699 cifs_dbg(VFS,
700 "SMB2.1 dialect returned but not requested\n");
701 return -EIO;
702 }
703 } else if (strcmp(ses->server->vals->version_string,
704 SMBDEFAULT_VERSION_STRING) == 0) {
705 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
706 cifs_dbg(VFS,
707 "SMB2 dialect returned but not requested\n");
708 return -EIO;
709 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
710 /* ops set to 3.0 by default for default so update */
711 ses->server->ops = &smb21_operations;
712 }
590d08d3
SF		 713 } else if (le16_to_cpu(rsp->DialectRevision) !=
714 ses->server->vals->protocol_id) {
9764c02f
SF		 715 /* if requested single dialect ensure returned dialect matched */
716 cifs_dbg(VFS, "Illegal 0x%x dialect returned: not requested\n",
590d08d3 717 le16_to_cpu(rsp->DialectRevision));
9764c02f
SF		 718 return -EIO;
719 }
720
f96637be 721 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
ec2e4523 722
e4aa25e7 723 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
f96637be 724 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
e4aa25e7 725 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
f96637be 726 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
e4aa25e7 727 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
f96637be 728 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
20b6d8b4
SF		 729 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
730 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
5f7fbf73
SF		 731#ifdef CONFIG_CIFS_SMB311
732 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
733 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
734#endif /* SMB311 */
ec2e4523 735 else {
f799d623 736 cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
f96637be 737 le16_to_cpu(rsp->DialectRevision));
ec2e4523
PS		 738 rc = -EIO;
739 goto neg_exit;
740 }
741 server->dialect = le16_to_cpu(rsp->DialectRevision);
742
9764c02f
SF		 743 /* BB: add check that dialect was valid given dialect(s) we asked for */
744
8bd68c6e
AA		 745#ifdef CONFIG_CIFS_SMB311
746 /*
747 * Keep a copy of the hash after negprot. This hash will be
748 * the starting hash value for all sessions made from this
749 * server.
750 */
751 memcpy(server->preauth_sha_hash, ses->preauth_sha_hash,
752 SMB2_PREAUTH_HASH_SIZE);
753#endif
e598d1d8
JL		 754 /* SMB2 only has an extended negflavor */
755 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
2365c4ea
PS		 756 /* set it to the maximum buffer size value we can send with 1 credit */
757 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
758 SMB2_MAX_BUFFER_SIZE);
ec2e4523
PS		 759 server->max_read = le32_to_cpu(rsp->MaxReadSize);
760 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
ec2e4523 761 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
07108d0e
SF		 762 if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode)
763 cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n",
764 server->sec_mode);
ec2e4523 765 server->capabilities = le32_to_cpu(rsp->Capabilities);
29e20f9c
PS		 766 /* Internal types */
767 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
ec2e4523
PS		 768
769 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
770 &rsp->hdr);
5d875cc9
SF		 771 /*
772 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
773 * for us will be
774 * ses->sectype = RawNTLMSSP;
775 * but for time being this is our only auth choice so doesn't matter.
776 * We just found a server which sets blob length to zero expecting raw.
777 */
67dbea2c 778 if (blob_length == 0) {
5d875cc9 779 cifs_dbg(FYI, "missing security blob on negprot\n");
67dbea2c
PS		 780 server->sec_ntlmssp = true;
781 }
3c1bf7e4 782
38d77c50 783 rc = cifs_enable_signing(server, ses->sign);
9ddec561
JL		 784 if (rc)
785 goto neg_exit;
ceb1b0b9 786 if (blob_length) {
ebdd207e 787 rc = decode_negTokenInit(security_blob, blob_length, server);
ceb1b0b9
SF		 788 if (rc == 1)
789 rc = 0;
790 else if (rc == 0)
791 rc = -EIO;
ec2e4523 792 }
5100d8a3
SF		 793
794#ifdef CONFIG_CIFS_SMB311
795 if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
796 if (rsp->NegotiateContextCount)
797 rc = smb311_decode_neg_context(rsp, server);
798 else
799 cifs_dbg(VFS, "Missing expected negotiate contexts\n");
800 }
801#endif /* CONFIG_CIFS_SMB311 */
ec2e4523
PS		 802neg_exit:
803 free_rsp_buf(resp_buftype, rsp);
804 return rc;
805}
5478f9ba 806
ff1c038a
SF		 807int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
808{
2796d303
LL		 809 int rc;
810 struct validate_negotiate_info_req *pneg_inbuf;
fe83bebc 811 struct validate_negotiate_info_rsp *pneg_rsp = NULL;
ff1c038a 812 u32 rsplen;
9764c02f 813 u32 inbuflen; /* max of 4 dialects */
ff1c038a
SF		 814
815 cifs_dbg(FYI, "validate negotiate\n");
816
8bd68c6e
AA		 817 /* In SMB3.11 preauth integrity supersedes validate negotiate */
818 if (tcon->ses->server->dialect == SMB311_PROT_ID)
819 return 0;
820
ff1c038a
SF		 821 /*
822 * validation ioctl must be signed, so no point sending this if we
0603c96f
SF		 823 * can not sign it (ie are not known user). Even if signing is not
824 * required (enabled but not negotiated), in those cases we selectively
ff1c038a 825 * sign just this, the first and only signed request on a connection.
0603c96f 826 * Having validation of negotiate info helps reduce attack vectors.
ff1c038a 827 */
0603c96f 828 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
ff1c038a
SF		 829 return 0; /* validation requires signing */
830
0603c96f
SF		 831 if (tcon->ses->user_name == NULL) {
832 cifs_dbg(FYI, "Can't validate negotiate: null user mount\n");
833 return 0; /* validation requires signing */
834 }
835
836 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
837 cifs_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n");
838
2796d303
LL		 839 pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS);
840 if (!pneg_inbuf)
841 return -ENOMEM;
842
843 pneg_inbuf->Capabilities =
ff1c038a 844 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
2796d303 845 memcpy(pneg_inbuf->Guid, tcon->ses->server->client_guid,
39552ea8 846 SMB2_CLIENT_GUID_SIZE);
ff1c038a
SF		 847
848 if (tcon->ses->sign)
2796d303 849 pneg_inbuf->SecurityMode =
ff1c038a
SF		 850 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
851 else if (global_secflags & CIFSSEC_MAY_SIGN)
2796d303 852 pneg_inbuf->SecurityMode =
ff1c038a
SF		 853 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
854 else
2796d303 855 pneg_inbuf->SecurityMode = 0;
ff1c038a 856
9764c02f
SF		 857
858 if (strcmp(tcon->ses->server->vals->version_string,
859 SMB3ANY_VERSION_STRING) == 0) {
2796d303
LL		 860 pneg_inbuf->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
861 pneg_inbuf->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
862 pneg_inbuf->DialectCount = cpu_to_le16(2);
9764c02f 863 /* structure is big enough for 3 dialects, sending only 2 */
2796d303
LL		 864 inbuflen = sizeof(*pneg_inbuf) -
865 sizeof(pneg_inbuf->Dialects[0]);
9764c02f
SF		 866 } else if (strcmp(tcon->ses->server->vals->version_string,
867 SMBDEFAULT_VERSION_STRING) == 0) {
2796d303
LL		 868 pneg_inbuf->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
869 pneg_inbuf->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
870 pneg_inbuf->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
871 pneg_inbuf->DialectCount = cpu_to_le16(3);
9764c02f 872 /* structure is big enough for 3 dialects */
2796d303 873 inbuflen = sizeof(*pneg_inbuf);
9764c02f
SF		 874 } else {
875 /* otherwise specific dialect was requested */
2796d303 876 pneg_inbuf->Dialects[0] =
9764c02f 877 cpu_to_le16(tcon->ses->server->vals->protocol_id);
2796d303 878 pneg_inbuf->DialectCount = cpu_to_le16(1);
9764c02f 879 /* structure is big enough for 3 dialects, sending only 1 */
2796d303
LL		 880 inbuflen = sizeof(*pneg_inbuf) -
881 sizeof(pneg_inbuf->Dialects[0]) * 2;
9764c02f 882 }
ff1c038a
SF		 883
884 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
885 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
2796d303 886 (char *)pneg_inbuf, inbuflen, (char **)&pneg_rsp, &rsplen);
ff1c038a
SF		 887
888 if (rc != 0) {
889 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
2796d303
LL		 890 rc = -EIO;
891 goto out_free_inbuf;
ff1c038a
SF		 892 }
893
2796d303
LL		 894 rc = -EIO;
895 if (rsplen != sizeof(*pneg_rsp)) {
7db0a6ef
SF		 896 cifs_dbg(VFS, "invalid protocol negotiate response size: %d\n",
897 rsplen);
898
899 /* relax check since Mac returns max bufsize allowed on ioctl */
2796d303
LL		 900 if (rsplen > CIFSMaxBufSize || rsplen < sizeof(*pneg_rsp))
901 goto out_free_rsp;
ff1c038a
SF		 902 }
903
904 /* check validate negotiate info response matches what we got earlier */
9aca7e45 905 if (pneg_rsp->Dialect != cpu_to_le16(tcon->ses->server->dialect))
ff1c038a
SF		 906 goto vneg_out;
907
908 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
909 goto vneg_out;
910
911 /* do not validate server guid because not saved at negprot time yet */
912
913 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
914 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
915 goto vneg_out;
916
917 /* validate negotiate successful */
2796d303 918 rc = 0;
ff1c038a 919 cifs_dbg(FYI, "validate negotiate info successful\n");
2796d303 920 goto out_free_rsp;
ff1c038a
SF		 921
922vneg_out:
923 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
2796d303 924out_free_rsp:
fe83bebc 925 kfree(pneg_rsp);
2796d303
LL		 926out_free_inbuf:
927 kfree(pneg_inbuf);
928 return rc;
ff1c038a
SF		 929}
930
ef65aaed
SP		 931enum securityEnum
932smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
933{
934 switch (requested) {
935 case Kerberos:
936 case RawNTLMSSP:
937 return requested;
938 case NTLMv2:
939 return RawNTLMSSP;
940 case Unspecified:
941 if (server->sec_ntlmssp &&
942 (global_secflags & CIFSSEC_MAY_NTLMSSP))
943 return RawNTLMSSP;
944 if ((server->sec_kerberos || server->sec_mskerberos) &&
945 (global_secflags & CIFSSEC_MAY_KRB5))
946 return Kerberos;
947 /* Fallthrough */
948 default:
949 return Unspecified;
950 }
951}
952
3baf1a7b
SP		 953struct SMB2_sess_data {
954 unsigned int xid;
955 struct cifs_ses *ses;
956 struct nls_table *nls_cp;
957 void (*func)(struct SMB2_sess_data *);
958 int result;
959 u64 previous_session;
960
961 /* we will send the SMB in three pieces:
962 * a fixed length beginning part, an optional
963 * SPNEGO blob (which can be zero length), and a
964 * last part which will include the strings
965 * and rest of bcc area. This allows us to avoid
966 * a large buffer 17K allocation
967 */
968 int buf0_type;
969 struct kvec iov[2];
970};
971
972static int
973SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
974{
975 int rc;
976 struct cifs_ses *ses = sess_data->ses;
977 struct smb2_sess_setup_req *req;
978 struct TCP_Server_Info *server = ses->server;
88ea5cb7 979 unsigned int total_len;
3baf1a7b 980
88ea5cb7
RS		 981 rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, (void **) &req,
982 &total_len);
3baf1a7b
SP		 983 if (rc)
984 return rc;
985
31473fc4 986 /* First session, not a reauthenticate */
88ea5cb7 987 req->sync_hdr.SessionId = 0;
3baf1a7b
SP		 988
989 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
990 req->PreviousSessionId = sess_data->previous_session;
991
992 req->Flags = 0; /* MBZ */
993 /* to enable echos and oplocks */
88ea5cb7 994 req->sync_hdr.CreditRequest = cpu_to_le16(3);
3baf1a7b
SP		 995
996 /* only one of SMB2 signing flags may be set in SMB2 request */
997 if (server->sign)
998 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
999 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
1000 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
1001 else
1002 req->SecurityMode = 0;
1003
1004 req->Capabilities = 0;
1005 req->Channel = 0; /* MBZ */
1006
1007 sess_data->iov[0].iov_base = (char *)req;
88ea5cb7
RS		 1008 /* 1 for pad */
1009 sess_data->iov[0].iov_len = total_len - 1;
3baf1a7b
SP		 1010 /*
1011 * This variable will be used to clear the buffer
1012 * allocated above in case of any error in the calling function.
1013 */
1014 sess_data->buf0_type = CIFS_SMALL_BUFFER;
1015
1016 return 0;
1017}
1018
1019static void
1020SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
1021{
1022 free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
1023 sess_data->buf0_type = CIFS_NO_BUFFER;
1024}
1025
1026static int
1027SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
1028{
1029 int rc;
1030 struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
da502f7d 1031 struct kvec rsp_iov = { NULL, 0 };
3baf1a7b
SP		 1032
1033 /* Testing shows that buffer offset must be at location of Buffer[0] */
1034 req->SecurityBufferOffset =
88ea5cb7 1035 cpu_to_le16(sizeof(struct smb2_sess_setup_req) - 1 /* pad */);
3baf1a7b
SP		 1036 req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
1037
3baf1a7b
SP		 1038 /* BB add code to build os and lm fields */
1039
88ea5cb7
RS		 1040 rc = smb2_send_recv(sess_data->xid, sess_data->ses,
1041 sess_data->iov, 2,
1042 &sess_data->buf0_type,
1043 CIFS_LOG_ERROR | CIFS_NEG_OP, &rsp_iov);
da502f7d
PS		 1044 cifs_small_buf_release(sess_data->iov[0].iov_base);
1045 memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
3baf1a7b
SP		 1046
1047 return rc;
1048}
1049
1050static int
1051SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
1052{
1053 int rc = 0;
1054 struct cifs_ses *ses = sess_data->ses;
1055
1056 mutex_lock(&ses->server->srv_mutex);
cabfb368 1057 if (ses->server->ops->generate_signingkey) {
3baf1a7b 1058 rc = ses->server->ops->generate_signingkey(ses);
3baf1a7b
SP		 1059 if (rc) {
1060 cifs_dbg(FYI,
1061 "SMB3 session key generation failed\n");
1062 mutex_unlock(&ses->server->srv_mutex);
cabfb368 1063 return rc;
3baf1a7b
SP		 1064 }
1065 }
1066 if (!ses->server->session_estab) {
1067 ses->server->sequence_number = 0x2;
1068 ses->server->session_estab = true;
1069 }
1070 mutex_unlock(&ses->server->srv_mutex);
1071
1072 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
1073 spin_lock(&GlobalMid_Lock);
1074 ses->status = CifsGood;
1075 ses->need_reconnect = false;
1076 spin_unlock(&GlobalMid_Lock);
3baf1a7b
SP		 1077 return rc;
1078}
1079
1080#ifdef CONFIG_CIFS_UPCALL
1081static void
1082SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1083{
1084 int rc;
1085 struct cifs_ses *ses = sess_data->ses;
1086 struct cifs_spnego_msg *msg;
1087 struct key *spnego_key = NULL;
1088 struct smb2_sess_setup_rsp *rsp = NULL;
1089
1090 rc = SMB2_sess_alloc_buffer(sess_data);
1091 if (rc)
1092 goto out;
1093
1094 spnego_key = cifs_get_spnego_key(ses);
1095 if (IS_ERR(spnego_key)) {
1096 rc = PTR_ERR(spnego_key);
1097 spnego_key = NULL;
1098 goto out;
1099 }
1100
1101 msg = spnego_key->payload.data[0];
1102 /*
1103 * check version field to make sure that cifs.upcall is
1104 * sending us a response in an expected form
1105 */
1106 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
1107 cifs_dbg(VFS,
1108 "bad cifs.upcall version. Expected %d got %d",
1109 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
1110 rc = -EKEYREJECTED;
1111 goto out_put_spnego_key;
1112 }
1113
1114 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
1115 GFP_KERNEL);
1116 if (!ses->auth_key.response) {
1117 cifs_dbg(VFS,
1118 "Kerberos can't allocate (%u bytes) memory",
1119 msg->sesskey_len);
1120 rc = -ENOMEM;
1121 goto out_put_spnego_key;
1122 }
1123 ses->auth_key.len = msg->sesskey_len;
1124
1125 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
1126 sess_data->iov[1].iov_len = msg->secblob_len;
1127
1128 rc = SMB2_sess_sendreceive(sess_data);
1129 if (rc)
1130 goto out_put_spnego_key;
1131
1132 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
31473fc4 1133 ses->Suid = rsp->hdr.sync_hdr.SessionId;
3baf1a7b
SP		 1134
1135 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
3baf1a7b
SP		 1136
1137 rc = SMB2_sess_establish_session(sess_data);
1138out_put_spnego_key:
1139 key_invalidate(spnego_key);
1140 key_put(spnego_key);
1141out:
1142 sess_data->result = rc;
1143 sess_data->func = NULL;
1144 SMB2_sess_free_buffer(sess_data);
1145}
1146#else
1147static void
1148SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1149{
1150 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
1151 sess_data->result = -EOPNOTSUPP;
1152 sess_data->func = NULL;
1153}
1154#endif
1155
166cea4d
SP		 1156static void
1157SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
1158
1159static void
1160SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
5478f9ba 1161{
166cea4d
SP		 1162 int rc;
1163 struct cifs_ses *ses = sess_data->ses;
5478f9ba 1164 struct smb2_sess_setup_rsp *rsp = NULL;
166cea4d 1165 char *ntlmssp_blob = NULL;
5478f9ba 1166 bool use_spnego = false; /* else use raw ntlmssp */
166cea4d 1167 u16 blob_length = 0;
d4e63bd6 1168
5478f9ba
PS		 1169 /*
1170 * If memory allocation is successful, caller of this function
1171 * frees it.
1172 */
1173 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
166cea4d
SP		 1174 if (!ses->ntlmssp) {
1175 rc = -ENOMEM;
1176 goto out_err;
1177 }
5c234aa5 1178 ses->ntlmssp->sesskey_per_smbsess = true;
5478f9ba 1179
166cea4d 1180 rc = SMB2_sess_alloc_buffer(sess_data);
5478f9ba 1181 if (rc)
166cea4d 1182 goto out_err;
5478f9ba 1183
166cea4d
SP		 1184 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
1185 GFP_KERNEL);
1186 if (ntlmssp_blob == NULL) {
1187 rc = -ENOMEM;
1188 goto out;
1189 }
c2afb814 1190
166cea4d
SP		 1191 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
1192 if (use_spnego) {
1193 /* BB eventually need to add this */
1194 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1195 rc = -EOPNOTSUPP;
1196 goto out;
1197 } else {
1198 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
1199 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
1200 }
1201 sess_data->iov[1].iov_base = ntlmssp_blob;
1202 sess_data->iov[1].iov_len = blob_length;
c2afb814 1203
166cea4d
SP		 1204 rc = SMB2_sess_sendreceive(sess_data);
1205 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
5478f9ba 1206
166cea4d
SP		 1207 /* If true, rc here is expected and not an error */
1208 if (sess_data->buf0_type != CIFS_NO_BUFFER &&
31473fc4 1209 rsp->hdr.sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
166cea4d 1210 rc = 0;
38d77c50 1211
166cea4d
SP		 1212 if (rc)
1213 goto out;
5478f9ba 1214
9fdd2e00 1215 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - ses->server->vals->header_preamble_size !=
166cea4d
SP		 1216 le16_to_cpu(rsp->SecurityBufferOffset)) {
1217 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
1218 le16_to_cpu(rsp->SecurityBufferOffset));
5478f9ba 1219 rc = -EIO;
166cea4d 1220 goto out;
5478f9ba 1221 }
166cea4d
SP		 1222 rc = decode_ntlmssp_challenge(rsp->Buffer,
1223 le16_to_cpu(rsp->SecurityBufferLength), ses);
1224 if (rc)
1225 goto out;
5478f9ba 1226
166cea4d 1227 cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
5478f9ba 1228
5478f9ba 1229
31473fc4 1230 ses->Suid = rsp->hdr.sync_hdr.SessionId;
166cea4d 1231 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
166cea4d
SP		 1232
1233out:
1234 kfree(ntlmssp_blob);
1235 SMB2_sess_free_buffer(sess_data);
1236 if (!rc) {
1237 sess_data->result = 0;
1238 sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
1239 return;
1240 }
1241out_err:
1242 kfree(ses->ntlmssp);
1243 ses->ntlmssp = NULL;
1244 sess_data->result = rc;
1245 sess_data->func = NULL;
1246}
5478f9ba 1247
166cea4d
SP		 1248static void
1249SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
1250{
1251 int rc;
1252 struct cifs_ses *ses = sess_data->ses;
1253 struct smb2_sess_setup_req *req;
1254 struct smb2_sess_setup_rsp *rsp = NULL;
1255 unsigned char *ntlmssp_blob = NULL;
1256 bool use_spnego = false; /* else use raw ntlmssp */
1257 u16 blob_length = 0;
5478f9ba 1258
166cea4d
SP		 1259 rc = SMB2_sess_alloc_buffer(sess_data);
1260 if (rc)
1261 goto out;
5478f9ba 1262
166cea4d 1263 req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
88ea5cb7 1264 req->sync_hdr.SessionId = ses->Suid;
166cea4d
SP		 1265
1266 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
1267 sess_data->nls_cp);
1268 if (rc) {
1269 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
1270 goto out;
5478f9ba
PS		 1271 }
1272
166cea4d
SP		 1273 if (use_spnego) {
1274 /* BB eventually need to add this */
1275 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1276 rc = -EOPNOTSUPP;
1277 goto out;
1278 }
1279 sess_data->iov[1].iov_base = ntlmssp_blob;
1280 sess_data->iov[1].iov_len = blob_length;
5478f9ba 1281
166cea4d
SP		 1282 rc = SMB2_sess_sendreceive(sess_data);
1283 if (rc)
1284 goto out;
1285
1286 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1287
31473fc4 1288 ses->Suid = rsp->hdr.sync_hdr.SessionId;
5478f9ba 1289 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
5478f9ba 1290
166cea4d
SP		 1291 rc = SMB2_sess_establish_session(sess_data);
1292out:
1293 kfree(ntlmssp_blob);
1294 SMB2_sess_free_buffer(sess_data);
1295 kfree(ses->ntlmssp);
1296 ses->ntlmssp = NULL;
1297 sess_data->result = rc;
1298 sess_data->func = NULL;
1299}
d4e63bd6 1300
166cea4d
SP		 1301static int
1302SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data)
1303{
ef65aaed
SP		 1304 int type;
1305
1306 type = smb2_select_sectype(ses->server, ses->sectype);
1307 cifs_dbg(FYI, "sess setup type %d\n", type);
1308 if (type == Unspecified) {
1309 cifs_dbg(VFS,
1310 "Unable to select appropriate authentication method!");
1311 return -EINVAL;
1312 }
d4e63bd6 1313
ef65aaed 1314 switch (type) {
166cea4d
SP		 1315 case Kerberos:
1316 sess_data->func = SMB2_auth_kerberos;
1317 break;
1318 case RawNTLMSSP:
1319 sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
1320 break;
1321 default:
ef65aaed 1322 cifs_dbg(VFS, "secType %d not supported!\n", type);
166cea4d 1323 return -EOPNOTSUPP;
d4e63bd6
SP		 1324 }
1325
166cea4d
SP		 1326 return 0;
1327}
1328
1329int
1330SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
1331 const struct nls_table *nls_cp)
1332{
1333 int rc = 0;
1334 struct TCP_Server_Info *server = ses->server;
1335 struct SMB2_sess_data *sess_data;
1336
1337 cifs_dbg(FYI, "Session Setup\n");
1338
1339 if (!server) {
1340 WARN(1, "%s: server is NULL!\n", __func__);
1341 return -EIO;
d4e63bd6 1342 }
d4e63bd6 1343
166cea4d
SP		 1344 sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
1345 if (!sess_data)
1346 return -ENOMEM;
1347
1348 rc = SMB2_select_sec(ses, sess_data);
1349 if (rc)
1350 goto out;
1351 sess_data->xid = xid;
1352 sess_data->ses = ses;
1353 sess_data->buf0_type = CIFS_NO_BUFFER;
1354 sess_data->nls_cp = (struct nls_table *) nls_cp;
1355
8bd68c6e
AA		 1356#ifdef CONFIG_CIFS_SMB311
1357 /*
1358 * Initialize the session hash with the server one.
1359 */
1360 memcpy(ses->preauth_sha_hash, ses->server->preauth_sha_hash,
1361 SMB2_PREAUTH_HASH_SIZE);
1362#endif
1363
166cea4d
SP		 1364 while (sess_data->func)
1365 sess_data->func(sess_data);
1366
c721c389
SF		 1367 if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign))
1368 cifs_dbg(VFS, "signing requested but authenticated as guest\n");
3baf1a7b 1369 rc = sess_data->result;
166cea4d 1370out:
3baf1a7b 1371 kfree(sess_data);
5478f9ba
PS		 1372 return rc;
1373}
1374
1375int
1376SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
1377{
1378 struct smb2_logoff_req *req; /* response is also trivial struct */
1379 int rc = 0;
1380 struct TCP_Server_Info *server;
7fb8986e 1381 int flags = 0;
45305eda
RS		 1382 unsigned int total_len;
1383 struct kvec iov[1];
1384 struct kvec rsp_iov;
1385 int resp_buf_type;
5478f9ba 1386
f96637be 1387 cifs_dbg(FYI, "disconnect session %p\n", ses);
5478f9ba
PS		 1388
1389 if (ses && (ses->server))
1390 server = ses->server;
1391 else
1392 return -EIO;
1393
eb4c7df6
SP		 1394 /* no need to send SMB logoff if uid already closed due to reconnect */
1395 if (ses->need_reconnect)
1396 goto smb2_session_already_dead;
1397
45305eda 1398 rc = smb2_plain_req_init(SMB2_LOGOFF, NULL, (void **) &req, &total_len);
5478f9ba
PS		 1399 if (rc)
1400 return rc;
1401
1402 /* since no tcon, smb2_init can not do this, so do here */
45305eda 1403 req->sync_hdr.SessionId = ses->Suid;
7fb8986e
PS		 1404
1405 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
1406 flags |= CIFS_TRANSFORM_REQ;
1407 else if (server->sign)
45305eda
RS		 1408 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1409
1410 flags |= CIFS_NO_RESP;
1411
1412 iov[0].iov_base = (char *)req;
1413 iov[0].iov_len = total_len;
5478f9ba 1414
45305eda 1415 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buf_type, flags, &rsp_iov);
da502f7d 1416 cifs_small_buf_release(req);
5478f9ba
PS		 1417 /*
1418 * No tcon so can't do
1419 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1420 */
eb4c7df6
SP		 1421
1422smb2_session_already_dead:
5478f9ba
PS		 1423 return rc;
1424}
faaf946a
PS		 1425
1426static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
1427{
d60622eb 1428 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
faaf946a
PS		 1429}
1430
1431#define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1432
de9f68df
SF		 1433/* These are similar values to what Windows uses */
1434static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
1435{
1436 tcon->max_chunks = 256;
1437 tcon->max_bytes_chunk = 1048576;
1438 tcon->max_bytes_copy = 16777216;
1439}
1440
faaf946a
PS		 1441int
1442SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
1443 struct cifs_tcon *tcon, const struct nls_table *cp)
1444{
1445 struct smb2_tree_connect_req *req;
1446 struct smb2_tree_connect_rsp *rsp = NULL;
1447 struct kvec iov[2];
db3b5474 1448 struct kvec rsp_iov = { NULL, 0 };
faaf946a
PS		 1449 int rc = 0;
1450 int resp_buftype;
1451 int unc_path_len;
faaf946a 1452 __le16 *unc_path = NULL;
7fb8986e 1453 int flags = 0;
661bb943 1454 unsigned int total_len;
faaf946a 1455
f96637be 1456 cifs_dbg(FYI, "TCON\n");
faaf946a 1457
68a6afa7 1458 if (!(ses->server) || !tree)
faaf946a
PS		 1459 return -EIO;
1460
faaf946a
PS		 1461 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
1462 if (unc_path == NULL)
1463 return -ENOMEM;
1464
1465 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
1466 unc_path_len *= 2;
1467 if (unc_path_len < 2) {
1468 kfree(unc_path);
1469 return -EINVAL;
1470 }
1471
806a28ef 1472 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
b327a717 1473 tcon->tid = 0;
806a28ef 1474
661bb943
RS		 1475 rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, (void **) &req,
1476 &total_len);
faaf946a
PS		 1477 if (rc) {
1478 kfree(unc_path);
1479 return rc;
1480 }
1481
5a77e75f 1482 if (smb3_encryption_required(tcon))
ae6f8dd4 1483 flags |= CIFS_TRANSFORM_REQ;
faaf946a
PS		 1484
1485 iov[0].iov_base = (char *)req;
661bb943
RS		 1486 /* 1 for pad */
1487 iov[0].iov_len = total_len - 1;
faaf946a
PS		 1488
1489 /* Testing shows that buffer offset must be at location of Buffer[0] */
1490 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
661bb943 1491 - 1 /* pad */);
faaf946a
PS		 1492 req->PathLength = cpu_to_le16(unc_path_len - 2);
1493 iov[1].iov_base = unc_path;
1494 iov[1].iov_len = unc_path_len;
1495
6188f28b
SF		 1496 /* 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 */
1497 if ((ses->server->dialect == SMB311_PROT_ID) &&
5a77e75f 1498 !smb3_encryption_required(tcon))
6188f28b
SF		 1499 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1500
661bb943 1501 rc = smb2_send_recv(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1502 cifs_small_buf_release(req);
1503 rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
faaf946a
PS		 1504
1505 if (rc != 0) {
1506 if (tcon) {
1507 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
1508 tcon->need_reconnect = true;
1509 }
1510 goto tcon_error_exit;
1511 }
1512
cd123007
CJ		 1513 switch (rsp->ShareType) {
1514 case SMB2_SHARE_TYPE_DISK:
f96637be 1515 cifs_dbg(FYI, "connection to disk share\n");
cd123007
CJ		 1516 break;
1517 case SMB2_SHARE_TYPE_PIPE:
b327a717 1518 tcon->pipe = true;
f96637be 1519 cifs_dbg(FYI, "connection to pipe share\n");
cd123007
CJ		 1520 break;
1521 case SMB2_SHARE_TYPE_PRINT:
b327a717 1522 tcon->print = true;
f96637be 1523 cifs_dbg(FYI, "connection to printer\n");
cd123007
CJ		 1524 break;
1525 default:
f96637be 1526 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
faaf946a
PS		 1527 rc = -EOPNOTSUPP;
1528 goto tcon_error_exit;
1529 }
1530
1531 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
769ee6a4 1532 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
faaf946a
PS		 1533 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1534 tcon->tidStatus = CifsGood;
1535 tcon->need_reconnect = false;
31473fc4 1536 tcon->tid = rsp->hdr.sync_hdr.TreeId;
46b51d08 1537 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
faaf946a
PS		 1538
1539 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1540 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
f96637be 1541 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
ae6f8dd4
PS		 1542
1543 if (tcon->seal &&
1544 !(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
1545 cifs_dbg(VFS, "Encryption is requested but not supported\n");
1546
de9f68df 1547 init_copy_chunk_defaults(tcon);
ff1c038a
SF		 1548 if (tcon->ses->server->ops->validate_negotiate)
1549 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
faaf946a
PS		 1550tcon_exit:
1551 free_rsp_buf(resp_buftype, rsp);
1552 kfree(unc_path);
1553 return rc;
1554
1555tcon_error_exit:
db3b5474 1556 if (rsp && rsp->hdr.sync_hdr.Status == STATUS_BAD_NETWORK_NAME) {
f96637be 1557 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
faaf946a
PS		 1558 }
1559 goto tcon_exit;
1560}
1561
1562int
1563SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1564{
1565 struct smb2_tree_disconnect_req *req; /* response is trivial */
1566 int rc = 0;
faaf946a 1567 struct cifs_ses *ses = tcon->ses;
7fb8986e 1568 int flags = 0;
4eecf4cf
RS		 1569 unsigned int total_len;
1570 struct kvec iov[1];
1571 struct kvec rsp_iov;
1572 int resp_buf_type;
faaf946a 1573
f96637be 1574 cifs_dbg(FYI, "Tree Disconnect\n");
faaf946a 1575
68a6afa7 1576 if (!ses || !(ses->server))
faaf946a
PS		 1577 return -EIO;
1578
1579 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1580 return 0;
1581
4eecf4cf
RS		 1582 rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req,
1583 &total_len);
faaf946a
PS		 1584 if (rc)
1585 return rc;
1586
5a77e75f 1587 if (smb3_encryption_required(tcon))
7fb8986e
PS		 1588 flags |= CIFS_TRANSFORM_REQ;
1589
4eecf4cf
RS		 1590 flags |= CIFS_NO_RESP;
1591
1592 iov[0].iov_base = (char *)req;
1593 iov[0].iov_len = total_len;
1594
1595 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buf_type, flags, &rsp_iov);
da502f7d 1596 cifs_small_buf_release(req);
faaf946a
PS		 1597 if (rc)
1598 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1599
1600 return rc;
1601}
2503a0db 1602
b8c32dbb 1603
63eb3def
PS		 1604static struct create_durable *
1605create_durable_buf(void)
1606{
1607 struct create_durable *buf;
1608
1609 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1610 if (!buf)
1611 return NULL;
1612
1613 buf->ccontext.DataOffset = cpu_to_le16(offsetof
9cbc0b73 1614 (struct create_durable, Data));
63eb3def
PS		 1615 buf->ccontext.DataLength = cpu_to_le32(16);
1616 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1617 (struct create_durable, Name));
1618 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 1619 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
63eb3def
PS		 1620 buf->Name[0] = 'D';
1621 buf->Name[1] = 'H';
1622 buf->Name[2] = 'n';
1623 buf->Name[3] = 'Q';
1624 return buf;
1625}
1626
9cbc0b73
PS		 1627static struct create_durable *
1628create_reconnect_durable_buf(struct cifs_fid *fid)
1629{
1630 struct create_durable *buf;
1631
1632 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1633 if (!buf)
1634 return NULL;
1635
1636 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1637 (struct create_durable, Data));
1638 buf->ccontext.DataLength = cpu_to_le32(16);
1639 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1640 (struct create_durable, Name));
1641 buf->ccontext.NameLength = cpu_to_le16(4);
1642 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1643 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
12197a7f 1644 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
9cbc0b73
PS		 1645 buf->Name[0] = 'D';
1646 buf->Name[1] = 'H';
1647 buf->Name[2] = 'n';
1648 buf->Name[3] = 'C';
1649 return buf;
1650}
1651
b8c32dbb 1652static __u8
42873b0a 1653parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
96164ab2 1654 unsigned int *epoch, char *lease_key)
b8c32dbb
PS		 1655{
1656 char *data_offset;
b5c7cde3 1657 struct create_context *cc;
deb7deff
JM		 1658 unsigned int next;
1659 unsigned int remaining;
fd554396 1660 char *name;
b8c32dbb 1661
93012bf9 1662 data_offset = (char *)rsp + server->vals->header_preamble_size + le32_to_cpu(rsp->CreateContextsOffset);
deb7deff 1663 remaining = le32_to_cpu(rsp->CreateContextsLength);
b5c7cde3 1664 cc = (struct create_context *)data_offset;
deb7deff 1665 while (remaining >= sizeof(struct create_context)) {
b5c7cde3 1666 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
deb7deff
JM		 1667 if (le16_to_cpu(cc->NameLength) == 4 &&
1668 strncmp(name, "RqLs", 4) == 0)
96164ab2
RS		 1669 return server->ops->parse_lease_buf(cc, epoch,
1670 lease_key);
deb7deff
JM		 1671
1672 next = le32_to_cpu(cc->Next);
1673 if (!next)
1674 break;
1675 remaining -= next;
1676 cc = (struct create_context *)((char *)cc + next);
1677 }
b8c32dbb 1678
b5c7cde3 1679 return 0;
b8c32dbb
PS		 1680}
1681
d22cbfec 1682static int
a41a28bd
PS		 1683add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1684 unsigned int *num_iovec, __u8 *oplock)
d22cbfec
PS		 1685{
1686 struct smb2_create_req *req = iov[0].iov_base;
1687 unsigned int num = *num_iovec;
1688
a41a28bd 1689 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
d22cbfec
PS		 1690 if (iov[num].iov_base == NULL)
1691 return -ENOMEM;
a41a28bd 1692 iov[num].iov_len = server->vals->create_lease_size;
d22cbfec
PS		 1693 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1694 if (!req->CreateContextsOffset)
1695 req->CreateContextsOffset = cpu_to_le32(
4f33bc35 1696 sizeof(struct smb2_create_req) +
d22cbfec 1697 iov[num - 1].iov_len);
a41a28bd
PS		 1698 le32_add_cpu(&req->CreateContextsLength,
1699 server->vals->create_lease_size);
d22cbfec
PS		 1700 *num_iovec = num + 1;
1701 return 0;
1702}
1703
b56eae4d
SF		 1704static struct create_durable_v2 *
1705create_durable_v2_buf(struct cifs_fid *pfid)
1706{
1707 struct create_durable_v2 *buf;
1708
1709 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
1710 if (!buf)
1711 return NULL;
1712
1713 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1714 (struct create_durable_v2, dcontext));
1715 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
1716 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1717 (struct create_durable_v2, Name));
1718 buf->ccontext.NameLength = cpu_to_le16(4);
1719
1720 buf->dcontext.Timeout = 0; /* Should this be configurable by workload */
1721 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
fa70b87c 1722 generate_random_uuid(buf->dcontext.CreateGuid);
b56eae4d
SF		 1723 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
1724
1725 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1726 buf->Name[0] = 'D';
1727 buf->Name[1] = 'H';
1728 buf->Name[2] = '2';
1729 buf->Name[3] = 'Q';
1730 return buf;
1731}
1732
1733static struct create_durable_handle_reconnect_v2 *
1734create_reconnect_durable_v2_buf(struct cifs_fid *fid)
1735{
1736 struct create_durable_handle_reconnect_v2 *buf;
1737
1738 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
1739 GFP_KERNEL);
1740 if (!buf)
1741 return NULL;
1742
1743 buf->ccontext.DataOffset =
1744 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1745 dcontext));
1746 buf->ccontext.DataLength =
1747 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
1748 buf->ccontext.NameOffset =
1749 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1750 Name));
1751 buf->ccontext.NameLength = cpu_to_le16(4);
1752
1753 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
1754 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
1755 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1756 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
1757
1758 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1759 buf->Name[0] = 'D';
1760 buf->Name[1] = 'H';
1761 buf->Name[2] = '2';
1762 buf->Name[3] = 'C';
1763 return buf;
1764}
1765
63eb3def 1766static int
b56eae4d
SF		 1767add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
1768 struct cifs_open_parms *oparms)
1769{
1770 struct smb2_create_req *req = iov[0].iov_base;
1771 unsigned int num = *num_iovec;
1772
1773 iov[num].iov_base = create_durable_v2_buf(oparms->fid);
1774 if (iov[num].iov_base == NULL)
1775 return -ENOMEM;
1776 iov[num].iov_len = sizeof(struct create_durable_v2);
1777 if (!req->CreateContextsOffset)
1778 req->CreateContextsOffset =
4f33bc35 1779 cpu_to_le32(sizeof(struct smb2_create_req) +
b56eae4d
SF		 1780 iov[1].iov_len);
1781 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
b56eae4d
SF		 1782 *num_iovec = num + 1;
1783 return 0;
1784}
1785
1786static int
1787add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
9cbc0b73 1788 struct cifs_open_parms *oparms)
63eb3def
PS		 1789{
1790 struct smb2_create_req *req = iov[0].iov_base;
1791 unsigned int num = *num_iovec;
1792
b56eae4d
SF		 1793 /* indicate that we don't need to relock the file */
1794 oparms->reconnect = false;
1795
1796 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
1797 if (iov[num].iov_base == NULL)
1798 return -ENOMEM;
1799 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
1800 if (!req->CreateContextsOffset)
1801 req->CreateContextsOffset =
4f33bc35 1802 cpu_to_le32(sizeof(struct smb2_create_req) +
b56eae4d
SF		 1803 iov[1].iov_len);
1804 le32_add_cpu(&req->CreateContextsLength,
1805 sizeof(struct create_durable_handle_reconnect_v2));
b56eae4d
SF		 1806 *num_iovec = num + 1;
1807 return 0;
1808}
1809
1810static int
1811add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1812 struct cifs_open_parms *oparms, bool use_persistent)
1813{
1814 struct smb2_create_req *req = iov[0].iov_base;
1815 unsigned int num = *num_iovec;
1816
1817 if (use_persistent) {
1818 if (oparms->reconnect)
1819 return add_durable_reconnect_v2_context(iov, num_iovec,
1820 oparms);
1821 else
1822 return add_durable_v2_context(iov, num_iovec, oparms);
1823 }
1824
9cbc0b73
PS		 1825 if (oparms->reconnect) {
1826 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1827 /* indicate that we don't need to relock the file */
1828 oparms->reconnect = false;
1829 } else
1830 iov[num].iov_base = create_durable_buf();
63eb3def
PS		 1831 if (iov[num].iov_base == NULL)
1832 return -ENOMEM;
1833 iov[num].iov_len = sizeof(struct create_durable);
1834 if (!req->CreateContextsOffset)
1835 req->CreateContextsOffset =
4f33bc35 1836 cpu_to_le32(sizeof(struct smb2_create_req) +
63eb3def 1837 iov[1].iov_len);
31f92e9a 1838 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
63eb3def
PS		 1839 *num_iovec = num + 1;
1840 return 0;
1841}
1842
f0712928
AA		 1843static int
1844alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
1845 const char *treename, const __le16 *path)
1846{
1847 int treename_len, path_len;
1848 struct nls_table *cp;
1849 const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
1850
1851 /*
1852 * skip leading "\\"
1853 */
1854 treename_len = strlen(treename);
1855 if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\'))
1856 return -EINVAL;
1857
1858 treename += 2;
1859 treename_len -= 2;
1860
1861 path_len = UniStrnlen((wchar_t *)path, PATH_MAX);
1862
1863 /*
1864 * make room for one path separator between the treename and
1865 * path
1866 */
1867 *out_len = treename_len + 1 + path_len;
1868
1869 /*
1870 * final path needs to be null-terminated UTF16 with a
1871 * size aligned to 8
1872 */
1873
1874 *out_size = roundup((*out_len+1)*2, 8);
1875 *out_path = kzalloc(*out_size, GFP_KERNEL);
1876 if (!*out_path)
1877 return -ENOMEM;
1878
1879 cp = load_nls_default();
1880 cifs_strtoUTF16(*out_path, treename, treename_len, cp);
1881 UniStrcat(*out_path, sep);
1882 UniStrcat(*out_path, path);
1883 unload_nls(cp);
1884
1885 return 0;
1886}
1887
2503a0db 1888int
064f6047 1889SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
b42bf888 1890 __u8 *oplock, struct smb2_file_all_info *buf,
91cb74f5 1891 struct kvec *err_iov)
2503a0db
PS		 1892{
1893 struct smb2_create_req *req;
1894 struct smb2_create_rsp *rsp;
1895 struct TCP_Server_Info *server;
064f6047 1896 struct cifs_tcon *tcon = oparms->tcon;
2503a0db 1897 struct cifs_ses *ses = tcon->ses;
ce558b0e 1898 struct kvec iov[5]; /* make sure at least one for each open context */
bf2afee1 1899 struct kvec rsp_iov = {NULL, 0};
2503a0db
PS		 1900 int resp_buftype;
1901 int uni_path_len;
b8c32dbb
PS		 1902 __le16 *copy_path = NULL;
1903 int copy_size;
2503a0db 1904 int rc = 0;
da502f7d 1905 unsigned int n_iov = 2;
ca81983f 1906 __u32 file_attributes = 0;
ce558b0e 1907 char *dhc_buf = NULL, *lc_buf = NULL, *pc_buf = NULL;
7fb8986e 1908 int flags = 0;
4f33bc35 1909 unsigned int total_len;
2503a0db 1910
f96637be 1911 cifs_dbg(FYI, "create/open\n");
2503a0db
PS		 1912
1913 if (ses && (ses->server))
1914 server = ses->server;
1915 else
1916 return -EIO;
1917
4f33bc35
RS		 1918 rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
1919
2503a0db
PS		 1920 if (rc)
1921 return rc;
1922
5a77e75f 1923 if (smb3_encryption_required(tcon))
7fb8986e
PS		 1924 flags |= CIFS_TRANSFORM_REQ;
1925
064f6047 1926 if (oparms->create_options & CREATE_OPTION_READONLY)
ca81983f 1927 file_attributes |= ATTR_READONLY;
db8b631d
SF		 1928 if (oparms->create_options & CREATE_OPTION_SPECIAL)
1929 file_attributes |= ATTR_SYSTEM;
ca81983f 1930
2503a0db 1931 req->ImpersonationLevel = IL_IMPERSONATION;
064f6047 1932 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
2503a0db
PS		 1933 /* File attributes ignored on open (used in create though) */
1934 req->FileAttributes = cpu_to_le32(file_attributes);
1935 req->ShareAccess = FILE_SHARE_ALL_LE;
064f6047
PS		 1936 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1937 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
2503a0db
PS		 1938
1939 iov[0].iov_base = (char *)req;
59aa3718 1940 /* -1 since last byte is buf[0] which is sent below (path) */
4f33bc35 1941 iov[0].iov_len = total_len - 1;
f0712928 1942
4f33bc35 1943 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
f0712928
AA		 1944
1945 /* [MS-SMB2] 2.2.13 NameOffset:
1946 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
1947 * the SMB2 header, the file name includes a prefix that will
1948 * be processed during DFS name normalization as specified in
1949 * section 3.3.5.9. Otherwise, the file name is relative to
1950 * the share that is identified by the TreeId in the SMB2
1951 * header.
1952 */
1953 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
1954 int name_len;
1955
4f33bc35 1956 req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
f0712928
AA		 1957 rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
1958 &name_len,
1959 tcon->treeName, path);
b7a73c84
RS		 1960 if (rc) {
1961 cifs_small_buf_release(req);
f0712928 1962 return rc;
b7a73c84 1963 }
f0712928 1964 req->NameLength = cpu_to_le16(name_len * 2);
59aa3718
PS		 1965 uni_path_len = copy_size;
1966 path = copy_path;
f0712928
AA		 1967 } else {
1968 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
1969 /* MUST set path len (NameLength) to 0 opening root of share */
1970 req->NameLength = cpu_to_le16(uni_path_len - 2);
1971 if (uni_path_len % 8 != 0) {
1972 copy_size = roundup(uni_path_len, 8);
1973 copy_path = kzalloc(copy_size, GFP_KERNEL);
b7a73c84
RS		 1974 if (!copy_path) {
1975 cifs_small_buf_release(req);
f0712928 1976 return -ENOMEM;
b7a73c84 1977 }
f0712928
AA		 1978 memcpy((char *)copy_path, (const char *)path,
1979 uni_path_len);
1980 uni_path_len = copy_size;
1981 path = copy_path;
1982 }
2503a0db
PS		 1983 }
1984
59aa3718
PS		 1985 iov[1].iov_len = uni_path_len;
1986 iov[1].iov_base = path;
59aa3718 1987
b8c32dbb
PS		 1988 if (!server->oplocks)
1989 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1990
a41a28bd 1991 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
b8c32dbb
PS		 1992 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1993 req->RequestedOplockLevel = *oplock;
1994 else {
da502f7d 1995 rc = add_lease_context(server, iov, &n_iov, oplock);
d22cbfec 1996 if (rc) {
b8c32dbb
PS		 1997 cifs_small_buf_release(req);
1998 kfree(copy_path);
d22cbfec 1999 return rc;
b8c32dbb 2000 }
da502f7d 2001 lc_buf = iov[n_iov-1].iov_base;
b8c32dbb
PS		 2002 }
2003
63eb3def
PS		 2004 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
2005 /* need to set Next field of lease context if we request it */
a41a28bd 2006 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
63eb3def 2007 struct create_context *ccontext =
da502f7d 2008 (struct create_context *)iov[n_iov-1].iov_base;
1c46943f 2009 ccontext->Next =
a41a28bd 2010 cpu_to_le32(server->vals->create_lease_size);
63eb3def 2011 }
b56eae4d 2012
da502f7d 2013 rc = add_durable_context(iov, &n_iov, oparms,
b56eae4d 2014 tcon->use_persistent);
63eb3def
PS		 2015 if (rc) {
2016 cifs_small_buf_release(req);
2017 kfree(copy_path);
663a9621 2018 kfree(lc_buf);
63eb3def
PS		 2019 return rc;
2020 }
da502f7d 2021 dhc_buf = iov[n_iov-1].iov_base;
63eb3def
PS		 2022 }
2023
ce558b0e
SF		 2024#ifdef CONFIG_CIFS_SMB311
2025 if (tcon->posix_extensions) {
2026 if (n_iov > 2) {
2027 struct create_context *ccontext =
2028 (struct create_context *)iov[n_iov-1].iov_base;
2029 ccontext->Next =
2030 cpu_to_le32(iov[n_iov-1].iov_len);
2031 }
2032
2033 rc = add_posix_context(iov, &n_iov, oparms->mode);
2034 if (rc) {
2035 cifs_small_buf_release(req);
2036 kfree(copy_path);
2037 kfree(lc_buf);
2038 kfree(dhc_buf);
2039 return rc;
2040 }
2041 pc_buf = iov[n_iov-1].iov_base;
2042 }
2043#endif /* SMB311 */
2044
4f33bc35
RS		 2045 rc = smb2_send_recv(xid, ses, iov, n_iov, &resp_buftype, flags,
2046 &rsp_iov);
da502f7d
PS		 2047 cifs_small_buf_release(req);
2048 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2503a0db
PS		 2049
2050 if (rc != 0) {
2051 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
91cb74f5
RS		 2052 if (err_iov && rsp) {
2053 *err_iov = rsp_iov;
2054 resp_buftype = CIFS_NO_BUFFER;
2055 rsp = NULL;
2056 }
28d59363
SF		 2057 trace_smb3_open_err(xid, tcon->tid, ses->Suid,
2058 oparms->create_options, oparms->desired_access, rc);
2503a0db 2059 goto creat_exit;
28d59363
SF		 2060 } else
2061 trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid,
2062 ses->Suid, oparms->create_options,
2063 oparms->desired_access);
2503a0db 2064
064f6047
PS		 2065 oparms->fid->persistent_fid = rsp->PersistentFileId;
2066 oparms->fid->volatile_fid = rsp->VolatileFileId;
f0df737e
PS		 2067
2068 if (buf) {
2069 memcpy(buf, &rsp->CreationTime, 32);
2070 buf->AllocationSize = rsp->AllocationSize;
2071 buf->EndOfFile = rsp->EndofFile;
2072 buf->Attributes = rsp->FileAttributes;
2073 buf->NumberOfLinks = cpu_to_le32(1);
2074 buf->DeletePending = 0;
2075 }
2e44b288 2076
b8c32dbb 2077 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
96164ab2
RS		 2078 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch,
2079 oparms->fid->lease_key);
b8c32dbb
PS		 2080 else
2081 *oplock = rsp->OplockLevel;
2503a0db 2082creat_exit:
b8c32dbb 2083 kfree(copy_path);
663a9621
PS		 2084 kfree(lc_buf);
2085 kfree(dhc_buf);
ce558b0e 2086 kfree(pc_buf);
2503a0db
PS		 2087 free_rsp_buf(resp_buftype, rsp);
2088 return rc;
2089}
2090
4a72dafa
SF		 2091/*
2092 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
2093 */
2094int
2095SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
63a83b86 2096 u64 volatile_fid, u32 opcode, bool is_fsctl,
51146625
AA		 2097 char *in_data, u32 indatalen,
2098 char **out_data, u32 *plen /* returned data len */)
4a72dafa
SF		 2099{
2100 struct smb2_ioctl_req *req;
2101 struct smb2_ioctl_rsp *rsp;
31473fc4 2102 struct smb2_sync_hdr *shdr;
8e353106 2103 struct cifs_ses *ses;
4a72dafa 2104 struct kvec iov[2];
da502f7d 2105 struct kvec rsp_iov;
4a72dafa 2106 int resp_buftype;
da502f7d 2107 int n_iov;
4a72dafa 2108 int rc = 0;
7fb8986e 2109 int flags = 0;
97754680 2110 unsigned int total_len;
4a72dafa
SF		 2111
2112 cifs_dbg(FYI, "SMB2 IOCTL\n");
2113
3d1a3745
SF		 2114 if (out_data != NULL)
2115 *out_data = NULL;
2116
4a72dafa
SF		 2117 /* zero out returned data len, in case of error */
2118 if (plen)
2119 *plen = 0;
2120
8e353106
SF		 2121 if (tcon)
2122 ses = tcon->ses;
2123 else
2124 return -EIO;
2125
68a6afa7 2126 if (!ses || !(ses->server))
4a72dafa
SF		 2127 return -EIO;
2128
97754680 2129 rc = smb2_plain_req_init(SMB2_IOCTL, tcon, (void **) &req, &total_len);
4a72dafa
SF		 2130 if (rc)
2131 return rc;
2132
5a77e75f 2133 if (smb3_encryption_required(tcon))
7fb8986e
PS		 2134 flags |= CIFS_TRANSFORM_REQ;
2135
4a72dafa
SF		 2136 req->CtlCode = cpu_to_le32(opcode);
2137 req->PersistentFileId = persistent_fid;
2138 req->VolatileFileId = volatile_fid;
2139
2140 if (indatalen) {
2141 req->InputCount = cpu_to_le32(indatalen);
2142 /* do not set InputOffset if no input data */
2143 req->InputOffset =
97754680 2144 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer));
4a72dafa
SF		 2145 iov[1].iov_base = in_data;
2146 iov[1].iov_len = indatalen;
da502f7d 2147 n_iov = 2;
4a72dafa 2148 } else
da502f7d 2149 n_iov = 1;
4a72dafa
SF		 2150
2151 req->OutputOffset = 0;
2152 req->OutputCount = 0; /* MBZ */
2153
2154 /*
2155 * Could increase MaxOutputResponse, but that would require more
2156 * than one credit. Windows typically sets this smaller, but for some
2157 * ioctls it may be useful to allow server to send more. No point
2158 * limiting what the server can send as long as fits in one credit
7db0a6ef
SF		 2159 * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE
2160 * (by default, note that it can be overridden to make max larger)
2161 * in responses (except for read responses which can be bigger.
2162 * We may want to bump this limit up
4a72dafa 2163 */
7db0a6ef 2164 req->MaxOutputResponse = cpu_to_le32(CIFSMaxBufSize);
4a72dafa
SF		 2165
2166 if (is_fsctl)
2167 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
2168 else
2169 req->Flags = 0;
2170
2171 iov[0].iov_base = (char *)req;
4a72dafa 2172
7ff8d45c
SF		 2173 /*
2174 * If no input data, the size of ioctl struct in
2175 * protocol spec still includes a 1 byte data buffer,
2176 * but if input data passed to ioctl, we do not
2177 * want to double count this, so we do not send
2178 * the dummy one byte of data in iovec[0] if sending
97754680 2179 * input data (in iovec[1]).
7ff8d45c
SF		 2180 */
2181
2182 if (indatalen) {
97754680 2183 iov[0].iov_len = total_len - 1;
7ff8d45c 2184 } else
97754680 2185 iov[0].iov_len = total_len;
7ff8d45c 2186
4587eee0
SF		 2187 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
2188 if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO)
97754680 2189 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
4a72dafa 2190
97754680
RS		 2191 rc = smb2_send_recv(xid, ses, iov, n_iov, &resp_buftype, flags,
2192 &rsp_iov);
da502f7d
PS		 2193 cifs_small_buf_release(req);
2194 rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
4a72dafa 2195
eccb4422
SF		 2196 if (rc != 0)
2197 trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid,
2198 ses->Suid, 0, opcode, rc);
2199
9bf0c9cd 2200 if ((rc != 0) && (rc != -EINVAL)) {
8e353106 2201 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
4a72dafa 2202 goto ioctl_exit;
9bf0c9cd
SF		 2203 } else if (rc == -EINVAL) {
2204 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
2205 (opcode != FSCTL_SRV_COPYCHUNK)) {
8e353106 2206 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
9bf0c9cd
SF		 2207 goto ioctl_exit;
2208 }
4a72dafa
SF		 2209 }
2210
2211 /* check if caller wants to look at return data or just return rc */
2212 if ((plen == NULL) || (out_data == NULL))
2213 goto ioctl_exit;
2214
2215 *plen = le32_to_cpu(rsp->OutputCount);
2216
2217 /* We check for obvious errors in the output buffer length and offset */
2218 if (*plen == 0)
2219 goto ioctl_exit; /* server returned no data */
2220 else if (*plen > 0xFF00) {
2221 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
2222 *plen = 0;
2223 rc = -EIO;
2224 goto ioctl_exit;
2225 }
2226
2227 if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
2228 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
2229 le32_to_cpu(rsp->OutputOffset));
2230 *plen = 0;
2231 rc = -EIO;
2232 goto ioctl_exit;
2233 }
2234
2235 *out_data = kmalloc(*plen, GFP_KERNEL);
2236 if (*out_data == NULL) {
2237 rc = -ENOMEM;
2238 goto ioctl_exit;
2239 }
2240
31473fc4
PS		 2241 shdr = get_sync_hdr(rsp);
2242 memcpy(*out_data, (char *)shdr + le32_to_cpu(rsp->OutputOffset), *plen);
4a72dafa
SF		 2243ioctl_exit:
2244 free_rsp_buf(resp_buftype, rsp);
2245 return rc;
2246}
2247
64a5cfa6
SF		 2248/*
2249 * Individual callers to ioctl worker function follow
2250 */
2251
2252int
2253SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2254 u64 persistent_fid, u64 volatile_fid)
2255{
2256 int rc;
64a5cfa6
SF		 2257 struct compress_ioctl fsctl_input;
2258 char *ret_data = NULL;
2259
2260 fsctl_input.CompressionState =
bc09d141 2261 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
64a5cfa6
SF		 2262
2263 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
2264 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
2265 (char *)&fsctl_input /* data input */,
2266 2 /* in data len */, &ret_data /* out data */, NULL);
2267
2268 cifs_dbg(FYI, "set compression rc %d\n", rc);
64a5cfa6
SF		 2269
2270 return rc;
2271}
2272
2503a0db 2273int
97ca1762
RS		 2274SMB2_close_flags(const unsigned int xid, struct cifs_tcon *tcon,
2275 u64 persistent_fid, u64 volatile_fid, int flags)
2503a0db
PS		 2276{
2277 struct smb2_close_req *req;
2278 struct smb2_close_rsp *rsp;
2503a0db
PS		 2279 struct cifs_ses *ses = tcon->ses;
2280 struct kvec iov[1];
da502f7d 2281 struct kvec rsp_iov;
2503a0db
PS		 2282 int resp_buftype;
2283 int rc = 0;
afcccefd 2284 unsigned int total_len;
2503a0db 2285
f96637be 2286 cifs_dbg(FYI, "Close\n");
2503a0db 2287
68a6afa7 2288 if (!ses || !(ses->server))
2503a0db
PS		 2289 return -EIO;
2290
afcccefd 2291 rc = smb2_plain_req_init(SMB2_CLOSE, tcon, (void **) &req, &total_len);
2503a0db
PS		 2292 if (rc)
2293 return rc;
2294
5a77e75f 2295 if (smb3_encryption_required(tcon))
7fb8986e
PS		 2296 flags |= CIFS_TRANSFORM_REQ;
2297
2503a0db
PS		 2298 req->PersistentFileId = persistent_fid;
2299 req->VolatileFileId = volatile_fid;
2300
2301 iov[0].iov_base = (char *)req;
afcccefd 2302 iov[0].iov_len = total_len;
2503a0db 2303
afcccefd 2304 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2305 cifs_small_buf_release(req);
2306 rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
2503a0db
PS		 2307
2308 if (rc != 0) {
d4a029d2 2309 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
eccb4422
SF		 2310 trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid,
2311 rc);
2503a0db
PS		 2312 goto close_exit;
2313 }
2314
2503a0db
PS		 2315 /* BB FIXME - decode close response, update inode for caching */
2316
2317close_exit:
2318 free_rsp_buf(resp_buftype, rsp);
2319 return rc;
2320}
be4cb9e3 2321
97ca1762
RS		 2322int
2323SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
2324 u64 persistent_fid, u64 volatile_fid)
2325{
2326 return SMB2_close_flags(xid, tcon, persistent_fid, volatile_fid, 0);
2327}
2328
be4cb9e3 2329static int
c1596ff5
RS		 2330validate_iov(struct TCP_Server_Info *server,
2331 unsigned int offset, unsigned int buffer_length,
2332 struct kvec *iov, unsigned int min_buf_size)
be4cb9e3 2333{
c1596ff5
RS		 2334 unsigned int smb_len = iov->iov_len;
2335 char *end_of_smb = smb_len + server->vals->header_preamble_size + (char *)iov->iov_base;
2336 char *begin_of_buf = server->vals->header_preamble_size + offset + (char *)iov->iov_base;
be4cb9e3
PS		 2337 char *end_of_buf = begin_of_buf + buffer_length;
2338
2339
2340 if (buffer_length < min_buf_size) {
f96637be
JP		 2341 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
2342 buffer_length, min_buf_size);
be4cb9e3
PS		 2343 return -EINVAL;
2344 }
2345
2346 /* check if beyond RFC1001 maximum length */
2347 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
f96637be
JP		 2348 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
2349 buffer_length, smb_len);
be4cb9e3
PS		 2350 return -EINVAL;
2351 }
2352
2353 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
f96637be 2354 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
be4cb9e3
PS		 2355 return -EINVAL;
2356 }
2357
2358 return 0;
2359}
2360
2361/*
2362 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2363 * Caller must free buffer.
2364 */
2365static int
c1596ff5
RS		 2366validate_and_copy_iov(struct TCP_Server_Info *server,
2367 unsigned int offset, unsigned int buffer_length,
2368 struct kvec *iov, unsigned int minbufsize,
be4cb9e3 2369 char *data)
be4cb9e3 2370{
c1596ff5 2371 char *begin_of_buf = server->vals->header_preamble_size + offset + (char *)(iov->iov_base);
be4cb9e3
PS		 2372 int rc;
2373
2374 if (!data)
2375 return -EINVAL;
2376
c1596ff5 2377 rc = validate_iov(server, offset, buffer_length, iov, minbufsize);
be4cb9e3
PS		 2378 if (rc)
2379 return rc;
2380
2381 memcpy(data, begin_of_buf, buffer_length);
2382
2383 return 0;
2384}
2385
f0df737e
PS		 2386static int
2387query_info(const unsigned int xid, struct cifs_tcon *tcon,
42c493c1
SP		 2388 u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
2389 u32 additional_info, size_t output_len, size_t min_len, void **data,
2390 u32 *dlen)
be4cb9e3
PS		 2391{
2392 struct smb2_query_info_req *req;
2393 struct smb2_query_info_rsp *rsp = NULL;
2394 struct kvec iov[2];
da502f7d 2395 struct kvec rsp_iov;
be4cb9e3
PS		 2396 int rc = 0;
2397 int resp_buftype;
be4cb9e3 2398 struct cifs_ses *ses = tcon->ses;
7fb8986e 2399 int flags = 0;
b2fb7fec 2400 unsigned int total_len;
be4cb9e3 2401
f96637be 2402 cifs_dbg(FYI, "Query Info\n");
be4cb9e3 2403
68a6afa7 2404 if (!ses || !(ses->server))
be4cb9e3
PS		 2405 return -EIO;
2406
b2fb7fec
RS		 2407 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
2408 &total_len);
be4cb9e3
PS		 2409 if (rc)
2410 return rc;
2411
5a77e75f 2412 if (smb3_encryption_required(tcon))
7fb8986e
PS		 2413 flags |= CIFS_TRANSFORM_REQ;
2414
42c493c1 2415 req->InfoType = info_type;
f0df737e 2416 req->FileInfoClass = info_class;
be4cb9e3
PS		 2417 req->PersistentFileId = persistent_fid;
2418 req->VolatileFileId = volatile_fid;
42c493c1 2419 req->AdditionalInformation = cpu_to_le32(additional_info);
48923d2a
AA		 2420
2421 /*
2422 * We do not use the input buffer (do not send extra byte)
2423 */
2424 req->InputBufferOffset = 0;
48923d2a 2425
f0df737e 2426 req->OutputBufferLength = cpu_to_le32(output_len);
be4cb9e3
PS		 2427
2428 iov[0].iov_base = (char *)req;
b2fb7fec
RS		 2429 /* 1 for Buffer */
2430 iov[0].iov_len = total_len - 1;
be4cb9e3 2431
b2fb7fec 2432 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2433 cifs_small_buf_release(req);
2434 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
e5d04887 2435
be4cb9e3
PS		 2436 if (rc) {
2437 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
eccb4422
SF		 2438 trace_smb3_query_info_err(xid, persistent_fid, tcon->tid,
2439 ses->Suid, info_class, (__u32)info_type, rc);
be4cb9e3
PS		 2440 goto qinf_exit;
2441 }
2442
42c493c1
SP		 2443 if (dlen) {
2444 *dlen = le32_to_cpu(rsp->OutputBufferLength);
2445 if (!*data) {
2446 *data = kmalloc(*dlen, GFP_KERNEL);
2447 if (!*data) {
2448 cifs_dbg(VFS,
2449 "Error %d allocating memory for acl\n",
2450 rc);
2451 *dlen = 0;
2452 goto qinf_exit;
2453 }
2454 }
2455 }
2456
c1596ff5
RS		 2457 rc = validate_and_copy_iov(ses->server,
2458 le16_to_cpu(rsp->OutputBufferOffset),
be4cb9e3 2459 le32_to_cpu(rsp->OutputBufferLength),
c1596ff5 2460 &rsp_iov, min_len, *data);
be4cb9e3
PS		 2461
2462qinf_exit:
2463 free_rsp_buf(resp_buftype, rsp);
2464 return rc;
2465}
9094fad1 2466
95907fea 2467int SMB2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
7cb3def4
RS		 2468 u64 persistent_fid, u64 volatile_fid,
2469 int ea_buf_size, struct smb2_file_full_ea_info *data)
95907fea
RS		 2470{
2471 return query_info(xid, tcon, persistent_fid, volatile_fid,
2472 FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, 0,
7cb3def4 2473 ea_buf_size,
95907fea
RS		 2474 sizeof(struct smb2_file_full_ea_info),
2475 (void **)&data,
2476 NULL);
2477}
2478
42c493c1
SP		 2479int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
2480 u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data)
2481{
2482 return query_info(xid, tcon, persistent_fid, volatile_fid,
2483 FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0,
2484 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
2485 sizeof(struct smb2_file_all_info), (void **)&data,
2486 NULL);
2487}
2488
f0df737e 2489int
42c493c1 2490SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
f0df737e 2491 u64 persistent_fid, u64 volatile_fid,
42c493c1 2492 void **data, u32 *plen)
f0df737e 2493{
42c493c1
SP		 2494 __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO;
2495 *plen = 0;
2496
f0df737e 2497 return query_info(xid, tcon, persistent_fid, volatile_fid,
42c493c1
SP		 2498 0, SMB2_O_INFO_SECURITY, additional_info,
2499 SMB2_MAX_BUFFER_SIZE,
2500 sizeof(struct smb2_file_all_info), data, plen);
f0df737e
PS		 2501}
2502
2503int
2504SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
2505 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
2506{
2507 return query_info(xid, tcon, persistent_fid, volatile_fid,
42c493c1
SP		 2508 FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0,
2509 sizeof(struct smb2_file_internal_info),
f0df737e 2510 sizeof(struct smb2_file_internal_info),
42c493c1 2511 (void **)&uniqueid, NULL);
f0df737e
PS		 2512}
2513
9094fad1
PS		 2514/*
2515 * This is a no-op for now. We're not really interested in the reply, but
2516 * rather in the fact that the server sent one and that server->lstrp
2517 * gets updated.
2518 *
2519 * FIXME: maybe we should consider checking that the reply matches request?
2520 */
2521static void
2522smb2_echo_callback(struct mid_q_entry *mid)
2523{
2524 struct TCP_Server_Info *server = mid->callback_data;
31473fc4 2525 struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
9094fad1
PS		 2526 unsigned int credits_received = 1;
2527
2528 if (mid->mid_state == MID_RESPONSE_RECEIVED)
31473fc4 2529 credits_received = le16_to_cpu(rsp->hdr.sync_hdr.CreditRequest);
9094fad1
PS		 2530
2531 DeleteMidQEntry(mid);
2532 add_credits(server, credits_received, CIFS_ECHO_OP);
2533}
2534
53e0e11e
PS		 2535void smb2_reconnect_server(struct work_struct *work)
2536{
2537 struct TCP_Server_Info *server = container_of(work,
2538 struct TCP_Server_Info, reconnect.work);
2539 struct cifs_ses *ses;
2540 struct cifs_tcon *tcon, *tcon2;
2541 struct list_head tmp_list;
2542 int tcon_exist = false;
18ea4311
GP		 2543 int rc;
2544 int resched = false;
2545
53e0e11e
PS		 2546
2547 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2548 mutex_lock(&server->reconnect_mutex);
2549
2550 INIT_LIST_HEAD(&tmp_list);
2551 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
2552
2553 spin_lock(&cifs_tcp_ses_lock);
2554 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2555 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
96a988ff 2556 if (tcon->need_reconnect || tcon->need_reopen_files) {
53e0e11e
PS		 2557 tcon->tc_count++;
2558 list_add_tail(&tcon->rlist, &tmp_list);
2559 tcon_exist = true;
2560 }
2561 }
b327a717
AA		 2562 if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) {
2563 list_add_tail(&ses->tcon_ipc->rlist, &tmp_list);
2564 tcon_exist = true;
2565 }
53e0e11e
PS		 2566 }
2567 /*
2568 * Get the reference to server struct to be sure that the last call of
2569 * cifs_put_tcon() in the loop below won't release the server pointer.
2570 */
2571 if (tcon_exist)
2572 server->srv_count++;
2573
2574 spin_unlock(&cifs_tcp_ses_lock);
2575
2576 list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
18ea4311
GP		 2577 rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon);
2578 if (!rc)
96a988ff 2579 cifs_reopen_persistent_handles(tcon);
18ea4311
GP		 2580 else
2581 resched = true;
53e0e11e
PS		 2582 list_del_init(&tcon->rlist);
2583 cifs_put_tcon(tcon);
2584 }
2585
2586 cifs_dbg(FYI, "Reconnecting tcons finished\n");
18ea4311
GP		 2587 if (resched)
2588 queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
53e0e11e
PS		 2589 mutex_unlock(&server->reconnect_mutex);
2590
2591 /* now we can safely release srv struct */
2592 if (tcon_exist)
2593 cifs_put_tcp_session(server, 1);
2594}
2595
9094fad1
PS		 2596int
2597SMB2_echo(struct TCP_Server_Info *server)
2598{
2599 struct smb2_echo_req *req;
2600 int rc = 0;
738f9de5
PS		 2601 struct kvec iov[2];
2602 struct smb_rqst rqst = { .rq_iov = iov,
2603 .rq_nvec = 2 };
7f7ae759
RS		 2604 unsigned int total_len;
2605 __be32 rfc1002_marker;
9094fad1 2606
f96637be 2607 cifs_dbg(FYI, "In echo request\n");
9094fad1 2608
4fcd1813 2609 if (server->tcpStatus == CifsNeedNegotiate) {
53e0e11e
PS		 2610 /* No need to send echo on newly established connections */
2611 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
2612 return rc;
4fcd1813
SF		 2613 }
2614
7f7ae759 2615 rc = smb2_plain_req_init(SMB2_ECHO, NULL, (void **)&req, &total_len);
9094fad1
PS		 2616 if (rc)
2617 return rc;
2618
7f7ae759 2619 req->sync_hdr.CreditRequest = cpu_to_le16(1);
9094fad1 2620
738f9de5 2621 iov[0].iov_len = 4;
7f7ae759
RS		 2622 rfc1002_marker = cpu_to_be32(total_len);
2623 iov[0].iov_base = &rfc1002_marker;
2624 iov[1].iov_len = total_len;
2625 iov[1].iov_base = (char *)req;
9094fad1 2626
9b7c18a2
PS		 2627 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
2628 server, CIFS_ECHO_OP);
9094fad1 2629 if (rc)
f96637be 2630 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
9094fad1
PS		 2631
2632 cifs_small_buf_release(req);
2633 return rc;
2634}
7a5cfb19
PS		 2635
2636int
2637SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2638 u64 volatile_fid)
2639{
2640 struct smb2_flush_req *req;
7a5cfb19
PS		 2641 struct cifs_ses *ses = tcon->ses;
2642 struct kvec iov[1];
da502f7d 2643 struct kvec rsp_iov;
7a5cfb19
PS		 2644 int resp_buftype;
2645 int rc = 0;
7fb8986e 2646 int flags = 0;
1f444e4c 2647 unsigned int total_len;
7a5cfb19 2648
f96637be 2649 cifs_dbg(FYI, "Flush\n");
7a5cfb19 2650
68a6afa7 2651 if (!ses || !(ses->server))
7a5cfb19
PS		 2652 return -EIO;
2653
1f444e4c 2654 rc = smb2_plain_req_init(SMB2_FLUSH, tcon, (void **) &req, &total_len);
7a5cfb19
PS		 2655 if (rc)
2656 return rc;
2657
5a77e75f 2658 if (smb3_encryption_required(tcon))
7fb8986e
PS		 2659 flags |= CIFS_TRANSFORM_REQ;
2660
7a5cfb19
PS		 2661 req->PersistentFileId = persistent_fid;
2662 req->VolatileFileId = volatile_fid;
2663
2664 iov[0].iov_base = (char *)req;
1f444e4c 2665 iov[0].iov_len = total_len;
7a5cfb19 2666
1f444e4c 2667 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d 2668 cifs_small_buf_release(req);
7a5cfb19 2669
eccb4422 2670 if (rc != 0) {
7a5cfb19 2671 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
eccb4422
SF		 2672 trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid,
2673 rc);
2674 }
7a5cfb19 2675
da502f7d 2676 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
7a5cfb19
PS		 2677 return rc;
2678}
09a4707e
PS		 2679
2680/*
2681 * To form a chain of read requests, any read requests after the first should
2682 * have the end_of_chain boolean set to true.
2683 */
2684static int
738f9de5 2685smb2_new_read_req(void **buf, unsigned int *total_len,
2dabfd5b
LL		 2686 struct cifs_io_parms *io_parms, struct cifs_readdata *rdata,
2687 unsigned int remaining_bytes, int request_type)
09a4707e
PS		 2688{
2689 int rc = -EACCES;
b8f57ee8 2690 struct smb2_read_plain_req *req = NULL;
31473fc4 2691 struct smb2_sync_hdr *shdr;
2dabfd5b 2692 struct TCP_Server_Info *server;
09a4707e 2693
b8f57ee8
PS		 2694 rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
2695 total_len);
09a4707e
PS		 2696 if (rc)
2697 return rc;
2dabfd5b
LL		 2698
2699 server = io_parms->tcon->ses->server;
2700 if (server == NULL)
09a4707e
PS		 2701 return -ECONNABORTED;
2702
b8f57ee8 2703 shdr = &req->sync_hdr;
31473fc4 2704 shdr->ProcessId = cpu_to_le32(io_parms->pid);
09a4707e
PS		 2705
2706 req->PersistentFileId = io_parms->persistent_fid;
2707 req->VolatileFileId = io_parms->volatile_fid;
2708 req->ReadChannelInfoOffset = 0; /* reserved */
2709 req->ReadChannelInfoLength = 0; /* reserved */
2710 req->Channel = 0; /* reserved */
2711 req->MinimumCount = 0;
2712 req->Length = cpu_to_le32(io_parms->length);
2713 req->Offset = cpu_to_le64(io_parms->offset);
bd3dcc6a
LL		 2714#ifdef CONFIG_CIFS_SMB_DIRECT
2715 /*
2716 * If we want to do a RDMA write, fill in and append
2717 * smbd_buffer_descriptor_v1 to the end of read request
2718 */
bb4c0419 2719 if (server->rdma && rdata && !server->sign &&
bd3dcc6a
LL		 2720 rdata->bytes >= server->smbd_conn->rdma_readwrite_threshold) {
2721
2722 struct smbd_buffer_descriptor_v1 *v1;
2723 bool need_invalidate =
2724 io_parms->tcon->ses->server->dialect == SMB30_PROT_ID;
2725
2726 rdata->mr = smbd_register_mr(
2727 server->smbd_conn, rdata->pages,
2728 rdata->nr_pages, rdata->tailsz,
2729 true, need_invalidate);
2730 if (!rdata->mr)
2731 return -ENOBUFS;
2732
2733 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
2734 if (need_invalidate)
2735 req->Channel = SMB2_CHANNEL_RDMA_V1;
2736 req->ReadChannelInfoOffset =
2026b06e 2737 cpu_to_le16(offsetof(struct smb2_read_plain_req, Buffer));
bd3dcc6a 2738 req->ReadChannelInfoLength =
2026b06e 2739 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
bd3dcc6a 2740 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
2026b06e
SF		 2741 v1->offset = cpu_to_le64(rdata->mr->mr->iova);
2742 v1->token = cpu_to_le32(rdata->mr->mr->rkey);
2743 v1->length = cpu_to_le32(rdata->mr->mr->length);
bd3dcc6a
LL		 2744
2745 *total_len += sizeof(*v1) - 1;
2746 }
2747#endif
09a4707e
PS		 2748 if (request_type & CHAINED_REQUEST) {
2749 if (!(request_type & END_OF_CHAIN)) {
b8f57ee8
PS		 2750 /* next 8-byte aligned request */
2751 *total_len = DIV_ROUND_UP(*total_len, 8) * 8;
2752 shdr->NextCommand = cpu_to_le32(*total_len);
09a4707e 2753 } else /* END_OF_CHAIN */
31473fc4 2754 shdr->NextCommand = 0;
09a4707e 2755 if (request_type & RELATED_REQUEST) {
31473fc4 2756 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
09a4707e
PS		 2757 /*
2758 * Related requests use info from previous read request
2759 * in chain.
2760 */
31473fc4
PS		 2761 shdr->SessionId = 0xFFFFFFFF;
2762 shdr->TreeId = 0xFFFFFFFF;
09a4707e
PS		 2763 req->PersistentFileId = 0xFFFFFFFF;
2764 req->VolatileFileId = 0xFFFFFFFF;
2765 }
2766 }
2767 if (remaining_bytes > io_parms->length)
2768 req->RemainingBytes = cpu_to_le32(remaining_bytes);
2769 else
2770 req->RemainingBytes = 0;
2771
738f9de5 2772 *buf = req;
09a4707e
PS		 2773 return rc;
2774}
2775
2776static void
2777smb2_readv_callback(struct mid_q_entry *mid)
2778{
2779 struct cifs_readdata *rdata = mid->callback_data;
2780 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
2781 struct TCP_Server_Info *server = tcon->ses->server;
738f9de5
PS		 2782 struct smb2_sync_hdr *shdr =
2783 (struct smb2_sync_hdr *)rdata->iov[1].iov_base;
09a4707e 2784 unsigned int credits_received = 1;
738f9de5
PS		 2785 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2786 .rq_nvec = 2,
8321fec4
JL		 2787 .rq_pages = rdata->pages,
2788 .rq_npages = rdata->nr_pages,
2789 .rq_pagesz = rdata->pagesz,
2790 .rq_tailsz = rdata->tailsz };
09a4707e 2791
f96637be
JP		 2792 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2793 __func__, mid->mid, mid->mid_state, rdata->result,
2794 rdata->bytes);
09a4707e
PS		 2795
2796 switch (mid->mid_state) {
2797 case MID_RESPONSE_RECEIVED:
31473fc4 2798 credits_received = le16_to_cpu(shdr->CreditRequest);
09a4707e 2799 /* result already set, check signature */
4326ed2f 2800 if (server->sign && !mid->decrypted) {
3c1bf7e4
PS		 2801 int rc;
2802
0b688cfc 2803 rc = smb2_verify_signature(&rqst, server);
3c1bf7e4 2804 if (rc)
f96637be
JP		 2805 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
2806 rc);
3c1bf7e4 2807 }
09a4707e 2808 /* FIXME: should this be counted toward the initiating task? */
34a54d61
PS		 2809 task_io_account_read(rdata->got_bytes);
2810 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 2811 break;
2812 case MID_REQUEST_SUBMITTED:
2813 case MID_RETRY_NEEDED:
2814 rdata->result = -EAGAIN;
d913ed17
PS		 2815 if (server->sign && rdata->got_bytes)
2816 /* reset bytes number since we can not check a sign */
2817 rdata->got_bytes = 0;
2818 /* FIXME: should this be counted toward the initiating task? */
2819 task_io_account_read(rdata->got_bytes);
2820 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 2821 break;
2822 default:
2823 if (rdata->result != -ENODATA)
2824 rdata->result = -EIO;
2825 }
bd3dcc6a
LL		 2826#ifdef CONFIG_CIFS_SMB_DIRECT
2827 /*
2828 * If this rdata has a memmory registered, the MR can be freed
2829 * MR needs to be freed as soon as I/O finishes to prevent deadlock
2830 * because they have limited number and are used for future I/Os
2831 */
2832 if (rdata->mr) {
2833 smbd_deregister_mr(rdata->mr);
2834 rdata->mr = NULL;
2835 }
2836#endif
09a4707e
PS		 2837 if (rdata->result)
2838 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
2839
2840 queue_work(cifsiod_wq, &rdata->work);
2841 DeleteMidQEntry(mid);
2842 add_credits(server, credits_received, 0);
2843}
2844
738f9de5 2845/* smb2_async_readv - send an async read, and set up mid to handle result */
09a4707e
PS		 2846int
2847smb2_async_readv(struct cifs_readdata *rdata)
2848{
bed9da02 2849 int rc, flags = 0;
31473fc4
PS		 2850 char *buf;
2851 struct smb2_sync_hdr *shdr;
09a4707e 2852 struct cifs_io_parms io_parms;
738f9de5
PS		 2853 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2854 .rq_nvec = 2 };
bed9da02 2855 struct TCP_Server_Info *server;
738f9de5 2856 unsigned int total_len;
b8f57ee8 2857 __be32 req_len;
09a4707e 2858
f96637be
JP		 2859 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
2860 __func__, rdata->offset, rdata->bytes);
09a4707e
PS		 2861
2862 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
2863 io_parms.offset = rdata->offset;
2864 io_parms.length = rdata->bytes;
2865 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
2866 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
2867 io_parms.pid = rdata->pid;
bed9da02
PS		 2868
2869 server = io_parms.tcon->ses->server;
2870
2dabfd5b
LL		 2871 rc = smb2_new_read_req(
2872 (void **) &buf, &total_len, &io_parms, rdata, 0, 0);
bed9da02
PS		 2873 if (rc) {
2874 if (rc == -EAGAIN && rdata->credits) {
2875 /* credits was reset by reconnect */
2876 rdata->credits = 0;
2877 /* reduce in_flight value since we won't send the req */
2878 spin_lock(&server->req_lock);
2879 server->in_flight--;
2880 spin_unlock(&server->req_lock);
2881 }
09a4707e 2882 return rc;
bed9da02 2883 }
09a4707e 2884
5a77e75f 2885 if (smb3_encryption_required(io_parms.tcon))
7fb8986e
PS		 2886 flags |= CIFS_TRANSFORM_REQ;
2887
b8f57ee8
PS		 2888 req_len = cpu_to_be32(total_len);
2889
2890 rdata->iov[0].iov_base = &req_len;
2891 rdata->iov[0].iov_len = sizeof(__be32);
2892 rdata->iov[1].iov_base = buf;
2893 rdata->iov[1].iov_len = total_len;
2894
2895 shdr = (struct smb2_sync_hdr *)buf;
09a4707e 2896
bed9da02 2897 if (rdata->credits) {
31473fc4 2898 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
bed9da02 2899 SMB2_MAX_BUFFER_SIZE));
31473fc4 2900 shdr->CreditRequest = shdr->CreditCharge;
bed9da02
PS		 2901 spin_lock(&server->req_lock);
2902 server->credits += rdata->credits -
31473fc4 2903 le16_to_cpu(shdr->CreditCharge);
bed9da02
PS		 2904 spin_unlock(&server->req_lock);
2905 wake_up(&server->request_q);
7fb8986e 2906 flags |= CIFS_HAS_CREDITS;
bed9da02
PS		 2907 }
2908
09a4707e 2909 kref_get(&rdata->refcount);
fec344e3 2910 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
09a4707e 2911 cifs_readv_receive, smb2_readv_callback,
4326ed2f 2912 smb3_handle_read_data, rdata, flags);
e5d04887 2913 if (rc) {
09a4707e 2914 kref_put(&rdata->refcount, cifs_readdata_release);
e5d04887 2915 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
eccb4422
SF		 2916 trace_smb3_read_err(rc, 0 /* xid */, io_parms.persistent_fid,
2917 io_parms.tcon->tid, io_parms.tcon->ses->Suid,
2918 io_parms.offset, io_parms.length);
2919 } else
2920 trace_smb3_read_done(0 /* xid */, io_parms.persistent_fid,
2921 io_parms.tcon->tid, io_parms.tcon->ses->Suid,
2922 io_parms.offset, io_parms.length);
09a4707e
PS		 2923
2924 cifs_small_buf_release(buf);
2925 return rc;
2926}
33319141 2927
d8e05039
PS		 2928int
2929SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
2930 unsigned int *nbytes, char **buf, int *buf_type)
2931{
2932 int resp_buftype, rc = -EACCES;
b8f57ee8 2933 struct smb2_read_plain_req *req = NULL;
d8e05039 2934 struct smb2_read_rsp *rsp = NULL;
31473fc4 2935 struct smb2_sync_hdr *shdr;
f5688a6d 2936 struct kvec iov[1];
da502f7d 2937 struct kvec rsp_iov;
738f9de5 2938 unsigned int total_len;
7fb8986e
PS		 2939 int flags = CIFS_LOG_ERROR;
2940 struct cifs_ses *ses = io_parms->tcon->ses;
d8e05039
PS		 2941
2942 *nbytes = 0;
2dabfd5b 2943 rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0);
d8e05039
PS		 2944 if (rc)
2945 return rc;
2946
5a77e75f 2947 if (smb3_encryption_required(io_parms->tcon))
7fb8986e
PS		 2948 flags |= CIFS_TRANSFORM_REQ;
2949
f5688a6d
RS		 2950 iov[0].iov_base = (char *)req;
2951 iov[0].iov_len = total_len;
b8f57ee8 2952
f5688a6d 2953 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
b8f57ee8 2954 cifs_small_buf_release(req);
d8e05039 2955
da502f7d 2956 rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
d8e05039 2957
a821df3f
RS		 2958 if (rc) {
2959 if (rc != -ENODATA) {
2960 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
2961 cifs_dbg(VFS, "Send error in read = %d\n", rc);
2962 }
eccb4422
SF		 2963 trace_smb3_read_err(rc, xid, req->PersistentFileId,
2964 io_parms->tcon->tid, ses->Suid,
2965 io_parms->offset, io_parms->length);
da502f7d 2966 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
a821df3f 2967 return rc == -ENODATA ? 0 : rc;
eccb4422
SF		 2968 } else
2969 trace_smb3_read_done(xid, req->PersistentFileId,
2970 io_parms->tcon->tid, ses->Suid,
2971 io_parms->offset, io_parms->length);
d8e05039 2972
a821df3f
RS		 2973 *nbytes = le32_to_cpu(rsp->DataLength);
2974 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
2975 (*nbytes > io_parms->length)) {
2976 cifs_dbg(FYI, "bad length %d for count %d\n",
2977 *nbytes, io_parms->length);
2978 rc = -EIO;
2979 *nbytes = 0;
d8e05039
PS		 2980 }
2981
a821df3f
RS		 2982 shdr = get_sync_hdr(rsp);
2983
d8e05039 2984 if (*buf) {
31473fc4 2985 memcpy(*buf, (char *)shdr + rsp->DataOffset, *nbytes);
da502f7d 2986 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
d8e05039 2987 } else if (resp_buftype != CIFS_NO_BUFFER) {
da502f7d 2988 *buf = rsp_iov.iov_base;
d8e05039
PS		 2989 if (resp_buftype == CIFS_SMALL_BUFFER)
2990 *buf_type = CIFS_SMALL_BUFFER;
2991 else if (resp_buftype == CIFS_LARGE_BUFFER)
2992 *buf_type = CIFS_LARGE_BUFFER;
2993 }
2994 return rc;
2995}
2996
33319141
PS		 2997/*
2998 * Check the mid_state and signature on received buffer (if any), and queue the
2999 * workqueue completion task.
3000 */
3001static void
3002smb2_writev_callback(struct mid_q_entry *mid)
3003{
3004 struct cifs_writedata *wdata = mid->callback_data;
3005 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
3006 unsigned int written;
3007 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
3008 unsigned int credits_received = 1;
3009
3010 switch (mid->mid_state) {
3011 case MID_RESPONSE_RECEIVED:
31473fc4 3012 credits_received = le16_to_cpu(rsp->hdr.sync_hdr.CreditRequest);
33319141
PS		 3013 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
3014 if (wdata->result != 0)
3015 break;
3016
3017 written = le32_to_cpu(rsp->DataLength);
3018 /*
3019 * Mask off high 16 bits when bytes written as returned
3020 * by the server is greater than bytes requested by the
3021 * client. OS/2 servers are known to set incorrect
3022 * CountHigh values.
3023 */
3024 if (written > wdata->bytes)
3025 written &= 0xFFFF;
3026
3027 if (written < wdata->bytes)
3028 wdata->result = -ENOSPC;
3029 else
3030 wdata->bytes = written;
3031 break;
3032 case MID_REQUEST_SUBMITTED:
3033 case MID_RETRY_NEEDED:
3034 wdata->result = -EAGAIN;
3035 break;
3036 default:
3037 wdata->result = -EIO;
3038 break;
3039 }
db223a59
LL		 3040#ifdef CONFIG_CIFS_SMB_DIRECT
3041 /*
3042 * If this wdata has a memory registered, the MR can be freed
3043 * The number of MRs available is limited, it's important to recover
3044 * used MR as soon as I/O is finished. Hold MR longer in the later
3045 * I/O process can possibly result in I/O deadlock due to lack of MR
3046 * to send request on I/O retry
3047 */
3048 if (wdata->mr) {
3049 smbd_deregister_mr(wdata->mr);
3050 wdata->mr = NULL;
3051 }
3052#endif
33319141
PS		 3053 if (wdata->result)
3054 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
3055
3056 queue_work(cifsiod_wq, &wdata->work);
3057 DeleteMidQEntry(mid);
3058 add_credits(tcon->ses->server, credits_received, 0);
3059}
3060
3061/* smb2_async_writev - send an async write, and set up mid to handle result */
3062int
4a5c80d7
SF		 3063smb2_async_writev(struct cifs_writedata *wdata,
3064 void (*release)(struct kref *kref))
33319141 3065{
cb7e9eab 3066 int rc = -EACCES, flags = 0;
33319141 3067 struct smb2_write_req *req = NULL;
31473fc4 3068 struct smb2_sync_hdr *shdr;
33319141 3069 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
cb7e9eab 3070 struct TCP_Server_Info *server = tcon->ses->server;
738f9de5
PS		 3071 struct kvec iov[2];
3072 struct smb_rqst rqst = { };
f5688a6d
RS		 3073 unsigned int total_len;
3074 __be32 rfc1002_marker;
33319141 3075
f5688a6d 3076 rc = smb2_plain_req_init(SMB2_WRITE, tcon, (void **) &req, &total_len);
cb7e9eab
PS		 3077 if (rc) {
3078 if (rc == -EAGAIN && wdata->credits) {
3079 /* credits was reset by reconnect */
3080 wdata->credits = 0;
3081 /* reduce in_flight value since we won't send the req */
3082 spin_lock(&server->req_lock);
3083 server->in_flight--;
3084 spin_unlock(&server->req_lock);
3085 }
33319141 3086 goto async_writev_out;
cb7e9eab 3087 }
33319141 3088
5a77e75f 3089 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3090 flags |= CIFS_TRANSFORM_REQ;
3091
f5688a6d 3092 shdr = (struct smb2_sync_hdr *)req;
31473fc4 3093 shdr->ProcessId = cpu_to_le32(wdata->cfile->pid);
33319141
PS		 3094
3095 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
3096 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
3097 req->WriteChannelInfoOffset = 0;
3098 req->WriteChannelInfoLength = 0;
3099 req->Channel = 0;
3100 req->Offset = cpu_to_le64(wdata->offset);
33319141 3101 req->DataOffset = cpu_to_le16(
f5688a6d 3102 offsetof(struct smb2_write_req, Buffer));
33319141 3103 req->RemainingBytes = 0;
db223a59
LL		 3104#ifdef CONFIG_CIFS_SMB_DIRECT
3105 /*
3106 * If we want to do a server RDMA read, fill in and append
3107 * smbd_buffer_descriptor_v1 to the end of write request
3108 */
bb4c0419 3109 if (server->rdma && !server->sign && wdata->bytes >=
db223a59
LL		 3110 server->smbd_conn->rdma_readwrite_threshold) {
3111
3112 struct smbd_buffer_descriptor_v1 *v1;
3113 bool need_invalidate = server->dialect == SMB30_PROT_ID;
3114
3115 wdata->mr = smbd_register_mr(
3116 server->smbd_conn, wdata->pages,
3117 wdata->nr_pages, wdata->tailsz,
3118 false, need_invalidate);
3119 if (!wdata->mr) {
3120 rc = -ENOBUFS;
3121 goto async_writev_out;
3122 }
3123 req->Length = 0;
3124 req->DataOffset = 0;
3125 req->RemainingBytes =
2026b06e 3126 cpu_to_le32((wdata->nr_pages-1)*PAGE_SIZE + wdata->tailsz);
db223a59
LL		 3127 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
3128 if (need_invalidate)
3129 req->Channel = SMB2_CHANNEL_RDMA_V1;
3130 req->WriteChannelInfoOffset =
2026b06e 3131 cpu_to_le16(offsetof(struct smb2_write_req, Buffer));
db223a59 3132 req->WriteChannelInfoLength =
2026b06e 3133 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
db223a59 3134 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
2026b06e
SF		 3135 v1->offset = cpu_to_le64(wdata->mr->mr->iova);
3136 v1->token = cpu_to_le32(wdata->mr->mr->rkey);
3137 v1->length = cpu_to_le32(wdata->mr->mr->length);
db223a59
LL		 3138 }
3139#endif
33319141 3140 /* 4 for rfc1002 length field and 1 for Buffer */
738f9de5 3141 iov[0].iov_len = 4;
f5688a6d
RS		 3142 rfc1002_marker = cpu_to_be32(total_len - 1 + wdata->bytes);
3143 iov[0].iov_base = &rfc1002_marker;
3144 iov[1].iov_len = total_len - 1;
3145 iov[1].iov_base = (char *)req;
33319141 3146
738f9de5
PS		 3147 rqst.rq_iov = iov;
3148 rqst.rq_nvec = 2;
eddb079d 3149 rqst.rq_pages = wdata->pages;
57a929a6 3150 rqst.rq_offset = wdata->page_offset;
eddb079d
JL		 3151 rqst.rq_npages = wdata->nr_pages;
3152 rqst.rq_pagesz = wdata->pagesz;
3153 rqst.rq_tailsz = wdata->tailsz;
db223a59
LL		 3154#ifdef CONFIG_CIFS_SMB_DIRECT
3155 if (wdata->mr) {
3156 iov[1].iov_len += sizeof(struct smbd_buffer_descriptor_v1);
3157 rqst.rq_npages = 0;
3158 }
3159#endif
f96637be
JP		 3160 cifs_dbg(FYI, "async write at %llu %u bytes\n",
3161 wdata->offset, wdata->bytes);
33319141 3162
db223a59
LL		 3163#ifdef CONFIG_CIFS_SMB_DIRECT
3164 /* For RDMA read, I/O size is in RemainingBytes not in Length */
3165 if (!wdata->mr)
3166 req->Length = cpu_to_le32(wdata->bytes);
3167#else
33319141 3168 req->Length = cpu_to_le32(wdata->bytes);
db223a59 3169#endif
33319141 3170
cb7e9eab 3171 if (wdata->credits) {
31473fc4 3172 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
cb7e9eab 3173 SMB2_MAX_BUFFER_SIZE));
31473fc4 3174 shdr->CreditRequest = shdr->CreditCharge;
cb7e9eab
PS		 3175 spin_lock(&server->req_lock);
3176 server->credits += wdata->credits -
31473fc4 3177 le16_to_cpu(shdr->CreditCharge);
cb7e9eab
PS		 3178 spin_unlock(&server->req_lock);
3179 wake_up(&server->request_q);
7fb8986e 3180 flags |= CIFS_HAS_CREDITS;
cb7e9eab
PS		 3181 }
3182
33319141 3183 kref_get(&wdata->refcount);
9b7c18a2
PS		 3184 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
3185 wdata, flags);
33319141 3186
e5d04887 3187 if (rc) {
eccb4422
SF		 3188 trace_smb3_write_err(0 /* no xid */, req->PersistentFileId,
3189 tcon->tid, tcon->ses->Suid, wdata->offset,
3190 wdata->bytes, rc);
4a5c80d7 3191 kref_put(&wdata->refcount, release);
e5d04887 3192 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
eccb4422
SF		 3193 } else
3194 trace_smb3_write_done(0 /* no xid */, req->PersistentFileId,
3195 tcon->tid, tcon->ses->Suid, wdata->offset,
3196 wdata->bytes);
33319141 3197
33319141
PS		 3198async_writev_out:
3199 cifs_small_buf_release(req);
33319141
PS		 3200 return rc;
3201}
009d3443
PS		 3202
3203/*
3204 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
3205 * The length field from io_parms must be at least 1 and indicates a number of
3206 * elements with data to write that begins with position 1 in iov array. All
3207 * data length is specified by count.
3208 */
3209int
3210SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
3211 unsigned int *nbytes, struct kvec *iov, int n_vec)
3212{
3213 int rc = 0;
3214 struct smb2_write_req *req = NULL;
3215 struct smb2_write_rsp *rsp = NULL;
3216 int resp_buftype;
da502f7d 3217 struct kvec rsp_iov;
7fb8986e 3218 int flags = 0;
f5688a6d 3219 unsigned int total_len;
da502f7d 3220
009d3443
PS		 3221 *nbytes = 0;
3222
3223 if (n_vec < 1)
3224 return rc;
3225
f5688a6d
RS		 3226 rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, (void **) &req,
3227 &total_len);
009d3443
PS		 3228 if (rc)
3229 return rc;
3230
3231 if (io_parms->tcon->ses->server == NULL)
3232 return -ECONNABORTED;
3233
5a77e75f 3234 if (smb3_encryption_required(io_parms->tcon))
7fb8986e
PS		 3235 flags |= CIFS_TRANSFORM_REQ;
3236
f5688a6d 3237 req->sync_hdr.ProcessId = cpu_to_le32(io_parms->pid);
009d3443
PS		 3238
3239 req->PersistentFileId = io_parms->persistent_fid;
3240 req->VolatileFileId = io_parms->volatile_fid;
3241 req->WriteChannelInfoOffset = 0;
3242 req->WriteChannelInfoLength = 0;
3243 req->Channel = 0;
3244 req->Length = cpu_to_le32(io_parms->length);
3245 req->Offset = cpu_to_le64(io_parms->offset);
009d3443 3246 req->DataOffset = cpu_to_le16(
f5688a6d 3247 offsetof(struct smb2_write_req, Buffer));
009d3443
PS		 3248 req->RemainingBytes = 0;
3249
3250 iov[0].iov_base = (char *)req;
f5688a6d
RS		 3251 /* 1 for Buffer */
3252 iov[0].iov_len = total_len - 1;
009d3443 3253
f5688a6d
RS		 3254 rc = smb2_send_recv(xid, io_parms->tcon->ses, iov, n_vec + 1,
3255 &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 3256 cifs_small_buf_release(req);
3257 rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
009d3443
PS		 3258
3259 if (rc) {
eccb4422
SF		 3260 trace_smb3_write_err(xid, req->PersistentFileId,
3261 io_parms->tcon->tid,
3262 io_parms->tcon->ses->Suid,
3263 io_parms->offset, io_parms->length, rc);
009d3443 3264 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
f96637be 3265 cifs_dbg(VFS, "Send error in write = %d\n", rc);
eccb4422 3266 } else {
009d3443 3267 *nbytes = le32_to_cpu(rsp->DataLength);
eccb4422
SF		 3268 trace_smb3_write_done(xid, req->PersistentFileId,
3269 io_parms->tcon->tid,
3270 io_parms->tcon->ses->Suid,
3271 io_parms->offset, *nbytes);
3272 }
e5d04887
PS		 3273
3274 free_rsp_buf(resp_buftype, rsp);
009d3443
PS		 3275 return rc;
3276}
35143eb5 3277
d324f08d
PS		 3278static unsigned int
3279num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
3280{
3281 int len;
3282 unsigned int entrycount = 0;
3283 unsigned int next_offset = 0;
3284 FILE_DIRECTORY_INFO *entryptr;
3285
3286 if (bufstart == NULL)
3287 return 0;
3288
3289 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
3290
3291 while (1) {
3292 entryptr = (FILE_DIRECTORY_INFO *)
3293 ((char *)entryptr + next_offset);
3294
3295 if ((char *)entryptr + size > end_of_buf) {
f96637be 3296 cifs_dbg(VFS, "malformed search entry would overflow\n");
d324f08d
PS		 3297 break;
3298 }
3299
3300 len = le32_to_cpu(entryptr->FileNameLength);
3301 if ((char *)entryptr + len + size > end_of_buf) {
f96637be
JP		 3302 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
3303 end_of_buf);
d324f08d
PS		 3304 break;
3305 }
3306
3307 *lastentry = (char *)entryptr;
3308 entrycount++;
3309
3310 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
3311 if (!next_offset)
3312 break;
3313 }
3314
3315 return entrycount;
3316}
3317
3318/*
3319 * Readdir/FindFirst
3320 */
3321int
3322SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
3323 u64 persistent_fid, u64 volatile_fid, int index,
3324 struct cifs_search_info *srch_inf)
3325{
3326 struct smb2_query_directory_req *req;
3327 struct smb2_query_directory_rsp *rsp = NULL;
3328 struct kvec iov[2];
da502f7d 3329 struct kvec rsp_iov;
d324f08d
PS		 3330 int rc = 0;
3331 int len;
75fdfc84 3332 int resp_buftype = CIFS_NO_BUFFER;
d324f08d
PS		 3333 unsigned char *bufptr;
3334 struct TCP_Server_Info *server;
3335 struct cifs_ses *ses = tcon->ses;
3336 __le16 asteriks = cpu_to_le16('*');
3337 char *end_of_smb;
3338 unsigned int output_size = CIFSMaxBufSize;
3339 size_t info_buf_size;
7fb8986e 3340 int flags = 0;
7c00c3a6 3341 unsigned int total_len;
d324f08d
PS		 3342
3343 if (ses && (ses->server))
3344 server = ses->server;
3345 else
3346 return -EIO;
3347
7c00c3a6
RS		 3348 rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req,
3349 &total_len);
d324f08d
PS		 3350 if (rc)
3351 return rc;
3352
5a77e75f 3353 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3354 flags |= CIFS_TRANSFORM_REQ;
3355
d324f08d
PS		 3356 switch (srch_inf->info_level) {
3357 case SMB_FIND_FILE_DIRECTORY_INFO:
3358 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
3359 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
3360 break;
3361 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
3362 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
3363 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
3364 break;
3365 default:
f96637be
JP		 3366 cifs_dbg(VFS, "info level %u isn't supported\n",
3367 srch_inf->info_level);
d324f08d
PS		 3368 rc = -EINVAL;
3369 goto qdir_exit;
3370 }
3371
3372 req->FileIndex = cpu_to_le32(index);
3373 req->PersistentFileId = persistent_fid;
3374 req->VolatileFileId = volatile_fid;
3375
3376 len = 0x2;
3377 bufptr = req->Buffer;
3378 memcpy(bufptr, &asteriks, len);
3379
3380 req->FileNameOffset =
7c00c3a6 3381 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1);
d324f08d
PS		 3382 req->FileNameLength = cpu_to_le16(len);
3383 /*
3384 * BB could be 30 bytes or so longer if we used SMB2 specific
3385 * buffer lengths, but this is safe and close enough.
3386 */
3387 output_size = min_t(unsigned int, output_size, server->maxBuf);
3388 output_size = min_t(unsigned int, output_size, 2 << 15);
3389 req->OutputBufferLength = cpu_to_le32(output_size);
3390
3391 iov[0].iov_base = (char *)req;
7c00c3a6
RS		 3392 /* 1 for Buffer */
3393 iov[0].iov_len = total_len - 1;
d324f08d
PS		 3394
3395 iov[1].iov_base = (char *)(req->Buffer);
3396 iov[1].iov_len = len;
3397
7c00c3a6 3398 rc = smb2_send_recv(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 3399 cifs_small_buf_release(req);
3400 rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
e5d04887 3401
d324f08d 3402 if (rc) {
31473fc4
PS		 3403 if (rc == -ENODATA &&
3404 rsp->hdr.sync_hdr.Status == STATUS_NO_MORE_FILES) {
52755808
PS		 3405 srch_inf->endOfSearch = true;
3406 rc = 0;
3407 }
d324f08d
PS		 3408 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
3409 goto qdir_exit;
3410 }
d324f08d 3411
c1596ff5
RS		 3412 rc = validate_iov(server,
3413 le16_to_cpu(rsp->OutputBufferOffset),
3414 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
d324f08d
PS		 3415 info_buf_size);
3416 if (rc)
3417 goto qdir_exit;
3418
3419 srch_inf->unicode = true;
3420
3421 if (srch_inf->ntwrk_buf_start) {
3422 if (srch_inf->smallBuf)
3423 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
3424 else
3425 cifs_buf_release(srch_inf->ntwrk_buf_start);
3426 }
3427 srch_inf->ntwrk_buf_start = (char *)rsp;
3428 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
3429 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
3430 /* 4 for rfc1002 length field */
3431 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
3432 srch_inf->entries_in_buffer =
3433 num_entries(srch_inf->srch_entries_start, end_of_smb,
3434 &srch_inf->last_entry, info_buf_size);
3435 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
f96637be
JP		 3436 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
3437 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
3438 srch_inf->srch_entries_start, srch_inf->last_entry);
d324f08d
PS		 3439 if (resp_buftype == CIFS_LARGE_BUFFER)
3440 srch_inf->smallBuf = false;
3441 else if (resp_buftype == CIFS_SMALL_BUFFER)
3442 srch_inf->smallBuf = true;
3443 else
f96637be 3444 cifs_dbg(VFS, "illegal search buffer type\n");
d324f08d 3445
d324f08d
PS		 3446 return rc;
3447
3448qdir_exit:
3449 free_rsp_buf(resp_buftype, rsp);
3450 return rc;
3451}
3452
35143eb5
PS		 3453static int
3454send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
dac95340
SP		 3455 u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
3456 u8 info_type, u32 additional_info, unsigned int num,
3457 void **data, unsigned int *size)
35143eb5
PS		 3458{
3459 struct smb2_set_info_req *req;
3460 struct smb2_set_info_rsp *rsp = NULL;
3461 struct kvec *iov;
da502f7d 3462 struct kvec rsp_iov;
35143eb5
PS		 3463 int rc = 0;
3464 int resp_buftype;
3465 unsigned int i;
35143eb5 3466 struct cifs_ses *ses = tcon->ses;
7fb8986e 3467 int flags = 0;
2fc803ef 3468 unsigned int total_len;
35143eb5 3469
68a6afa7 3470 if (!ses || !(ses->server))
35143eb5
PS		 3471 return -EIO;
3472
3473 if (!num)
3474 return -EINVAL;
3475
3476 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
3477 if (!iov)
3478 return -ENOMEM;
3479
2fc803ef 3480 rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, (void **) &req, &total_len);
35143eb5
PS		 3481 if (rc) {
3482 kfree(iov);
3483 return rc;
3484 }
3485
5a77e75f 3486 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3487 flags |= CIFS_TRANSFORM_REQ;
3488
2fc803ef 3489 req->sync_hdr.ProcessId = cpu_to_le32(pid);
c839ff24 3490
dac95340 3491 req->InfoType = info_type;
35143eb5
PS		 3492 req->FileInfoClass = info_class;
3493 req->PersistentFileId = persistent_fid;
3494 req->VolatileFileId = volatile_fid;
dac95340 3495 req->AdditionalInformation = cpu_to_le32(additional_info);
35143eb5 3496
35143eb5 3497 req->BufferOffset =
2fc803ef 3498 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1);
35143eb5
PS		 3499 req->BufferLength = cpu_to_le32(*size);
3500
35143eb5 3501 memcpy(req->Buffer, *data, *size);
2fc803ef 3502 total_len += *size;
35143eb5
PS		 3503
3504 iov[0].iov_base = (char *)req;
2fc803ef
RS		 3505 /* 1 for Buffer */
3506 iov[0].iov_len = total_len - 1;
35143eb5
PS		 3507
3508 for (i = 1; i < num; i++) {
35143eb5
PS		 3509 le32_add_cpu(&req->BufferLength, size[i]);
3510 iov[i].iov_base = (char *)data[i];
3511 iov[i].iov_len = size[i];
3512 }
3513
2fc803ef
RS		 3514 rc = smb2_send_recv(xid, ses, iov, num, &resp_buftype, flags,
3515 &rsp_iov);
da502f7d
PS		 3516 cifs_small_buf_release(req);
3517 rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
35143eb5 3518
eccb4422 3519 if (rc != 0) {
35143eb5 3520 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
eccb4422
SF		 3521 trace_smb3_set_info_err(xid, persistent_fid, tcon->tid,
3522 ses->Suid, info_class, (__u32)info_type, rc);
3523 }
7d3fb24b 3524
35143eb5
PS		 3525 free_rsp_buf(resp_buftype, rsp);
3526 kfree(iov);
3527 return rc;
3528}
3529
3530int
3531SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
3532 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3533{
3534 struct smb2_file_rename_info info;
3535 void **data;
3536 unsigned int size[2];
3537 int rc;
3538 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3539
3540 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
3541 if (!data)
3542 return -ENOMEM;
3543
3544 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
3545 /* 0 = fail if target already exists */
3546 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3547 info.FileNameLength = cpu_to_le32(len);
3548
3549 data[0] = &info;
3550 size[0] = sizeof(struct smb2_file_rename_info);
3551
3552 data[1] = target_file;
3553 size[1] = len + 2 /* null */;
3554
3555 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3556 current->tgid, FILE_RENAME_INFORMATION, SMB2_O_INFO_FILE,
3557 0, 2, data, size);
35143eb5
PS		 3558 kfree(data);
3559 return rc;
3560}
568798cc 3561
897fba11
SF		 3562int
3563SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
3564 u64 persistent_fid, u64 volatile_fid)
3565{
3566 __u8 delete_pending = 1;
3567 void *data;
3568 unsigned int size;
3569
3570 data = &delete_pending;
3571 size = 1; /* sizeof __u8 */
3572
3573 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3574 current->tgid, FILE_DISPOSITION_INFORMATION, SMB2_O_INFO_FILE,
3575 0, 1, &data, &size);
897fba11
SF		 3576}
3577
568798cc
PS		 3578int
3579SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
3580 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3581{
3582 struct smb2_file_link_info info;
3583 void **data;
3584 unsigned int size[2];
3585 int rc;
3586 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3587
3588 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
3589 if (!data)
3590 return -ENOMEM;
3591
3592 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
3593 /* 0 = fail if link already exists */
3594 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3595 info.FileNameLength = cpu_to_le32(len);
3596
3597 data[0] = &info;
3598 size[0] = sizeof(struct smb2_file_link_info);
3599
3600 data[1] = target_file;
3601 size[1] = len + 2 /* null */;
3602
3603 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3604 current->tgid, FILE_LINK_INFORMATION, SMB2_O_INFO_FILE,
3605 0, 2, data, size);
568798cc
PS		 3606 kfree(data);
3607 return rc;
3608}
c839ff24
PS		 3609
3610int
3611SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
f29ebb47 3612 u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc)
c839ff24
PS		 3613{
3614 struct smb2_file_eof_info info;
3615 void *data;
3616 unsigned int size;
3617
3618 info.EndOfFile = *eof;
3619
3620 data = &info;
3621 size = sizeof(struct smb2_file_eof_info);
3622
f29ebb47
SF		 3623 if (is_falloc)
3624 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3625 pid, FILE_ALLOCATION_INFORMATION, SMB2_O_INFO_FILE,
3626 0, 1, &data, &size);
f29ebb47
SF		 3627 else
3628 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3629 pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE,
3630 0, 1, &data, &size);
c839ff24 3631}
1feeaac7
PS		 3632
3633int
3634SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
3635 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
3636{
3637 unsigned int size;
3638 size = sizeof(FILE_BASIC_INFO);
3639 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3640 current->tgid, FILE_BASIC_INFORMATION, SMB2_O_INFO_FILE,
3641 0, 1, (void **)&buf, &size);
3642}
3643
3644int
3645SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
3646 u64 persistent_fid, u64 volatile_fid,
3647 struct cifs_ntsd *pnntsd, int pacllen, int aclflag)
3648{
3649 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3650 current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag,
3651 1, (void **)&pnntsd, &pacllen);
1feeaac7 3652}
983c88a4 3653
5517554e
RS		 3654int
3655SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
3656 u64 persistent_fid, u64 volatile_fid,
3657 struct smb2_file_full_ea_info *buf, int len)
3658{
3659 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3660 current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE,
3661 0, 1, (void **)&buf, &len);
3662}
3663
983c88a4
PS		 3664int
3665SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
3666 const u64 persistent_fid, const u64 volatile_fid,
3667 __u8 oplock_level)
3668{
3669 int rc;
21ad9487
RS		 3670 struct smb2_oplock_break_req *req = NULL;
3671 struct cifs_ses *ses = tcon->ses;
7fb8986e 3672 int flags = CIFS_OBREAK_OP;
21ad9487
RS		 3673 unsigned int total_len;
3674 struct kvec iov[1];
3675 struct kvec rsp_iov;
3676 int resp_buf_type;
983c88a4 3677
f96637be 3678 cifs_dbg(FYI, "SMB2_oplock_break\n");
21ad9487
RS		 3679 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
3680 &total_len);
983c88a4
PS		 3681 if (rc)
3682 return rc;
3683
5a77e75f 3684 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3685 flags |= CIFS_TRANSFORM_REQ;
3686
983c88a4
PS		 3687 req->VolatileFid = volatile_fid;
3688 req->PersistentFid = persistent_fid;
3689 req->OplockLevel = oplock_level;
21ad9487 3690 req->sync_hdr.CreditRequest = cpu_to_le16(1);
983c88a4 3691
21ad9487
RS		 3692 flags |= CIFS_NO_RESP;
3693
3694 iov[0].iov_base = (char *)req;
3695 iov[0].iov_len = total_len;
3696
3697 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buf_type, flags, &rsp_iov);
da502f7d 3698 cifs_small_buf_release(req);
983c88a4
PS		 3699
3700 if (rc) {
3701 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 3702 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
983c88a4
PS		 3703 }
3704
3705 return rc;
3706}
6fc05c25
PS		 3707
3708static void
3709copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
3710 struct kstatfs *kst)
3711{
3712 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
3713 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
3714 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
42bec214
SP		 3715 kst->f_bfree = kst->f_bavail =
3716 le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
6fc05c25
PS		 3717 return;
3718}
3719
3720static int
3721build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
3722 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
3723{
c0953f2e 3724 struct TCP_Server_Info *server;
6fc05c25
PS		 3725 int rc;
3726 struct smb2_query_info_req *req;
b2fb7fec 3727 unsigned int total_len;
6fc05c25 3728
f96637be 3729 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
6fc05c25
PS		 3730
3731 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
3732 return -EIO;
3733
c0953f2e
GS		 3734 server = tcon->ses->server;
3735
b2fb7fec
RS		 3736 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
3737 &total_len);
6fc05c25
PS		 3738 if (rc)
3739 return rc;
3740
3741 req->InfoType = SMB2_O_INFO_FILESYSTEM;
3742 req->FileInfoClass = level;
3743 req->PersistentFileId = persistent_fid;
3744 req->VolatileFileId = volatile_fid;
b2fb7fec 3745 /* 1 for pad */
6fc05c25 3746 req->InputBufferOffset =
b2fb7fec 3747 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1);
6fc05c25 3748 req->OutputBufferLength = cpu_to_le32(
93012bf9 3749 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - server->vals->header_preamble_size);
6fc05c25
PS		 3750
3751 iov->iov_base = (char *)req;
b2fb7fec 3752 iov->iov_len = total_len;
6fc05c25
PS		 3753 return 0;
3754}
3755
3756int
3757SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
3758 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
3759{
3760 struct smb2_query_info_rsp *rsp = NULL;
3761 struct kvec iov;
da502f7d 3762 struct kvec rsp_iov;
6fc05c25
PS		 3763 int rc = 0;
3764 int resp_buftype;
3765 struct cifs_ses *ses = tcon->ses;
93012bf9 3766 struct TCP_Server_Info *server = ses->server;
6fc05c25 3767 struct smb2_fs_full_size_info *info = NULL;
7fb8986e 3768 int flags = 0;
6fc05c25
PS		 3769
3770 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
3771 sizeof(struct smb2_fs_full_size_info),
3772 persistent_fid, volatile_fid);
3773 if (rc)
3774 return rc;
3775
5a77e75f 3776 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3777 flags |= CIFS_TRANSFORM_REQ;
3778
b2fb7fec 3779 rc = smb2_send_recv(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d 3780 cifs_small_buf_release(iov.iov_base);
6fc05c25
PS		 3781 if (rc) {
3782 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
34f62640 3783 goto qfsinf_exit;
6fc05c25 3784 }
da502f7d 3785 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
6fc05c25 3786
93012bf9 3787 info = (struct smb2_fs_full_size_info *)(server->vals->header_preamble_size +
6fc05c25 3788 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
c1596ff5
RS		 3789 rc = validate_iov(server,
3790 le16_to_cpu(rsp->OutputBufferOffset),
3791 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
6fc05c25
PS		 3792 sizeof(struct smb2_fs_full_size_info));
3793 if (!rc)
3794 copy_fs_info_to_kstatfs(info, fsdata);
3795
34f62640 3796qfsinf_exit:
da502f7d 3797 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
34f62640
SF		 3798 return rc;
3799}
3800
3801int
3802SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2167114c 3803 u64 persistent_fid, u64 volatile_fid, int level)
34f62640
SF		 3804{
3805 struct smb2_query_info_rsp *rsp = NULL;
3806 struct kvec iov;
da502f7d 3807 struct kvec rsp_iov;
34f62640 3808 int rc = 0;
2167114c 3809 int resp_buftype, max_len, min_len;
34f62640 3810 struct cifs_ses *ses = tcon->ses;
93012bf9 3811 struct TCP_Server_Info *server = ses->server;
34f62640 3812 unsigned int rsp_len, offset;
7fb8986e 3813 int flags = 0;
34f62640 3814
2167114c
SF		 3815 if (level == FS_DEVICE_INFORMATION) {
3816 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3817 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3818 } else if (level == FS_ATTRIBUTE_INFORMATION) {
3819 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
3820 min_len = MIN_FS_ATTR_INFO_SIZE;
af6a12ea
SF		 3821 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
3822 max_len = sizeof(struct smb3_fs_ss_info);
3823 min_len = sizeof(struct smb3_fs_ss_info);
2167114c 3824 } else {
af6a12ea 3825 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2167114c
SF		 3826 return -EINVAL;
3827 }
3828
3829 rc = build_qfs_info_req(&iov, tcon, level, max_len,
34f62640
SF		 3830 persistent_fid, volatile_fid);
3831 if (rc)
3832 return rc;
3833
5a77e75f 3834 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3835 flags |= CIFS_TRANSFORM_REQ;
3836
b2fb7fec 3837 rc = smb2_send_recv(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d 3838 cifs_small_buf_release(iov.iov_base);
34f62640
SF		 3839 if (rc) {
3840 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
3841 goto qfsattr_exit;
3842 }
da502f7d 3843 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
34f62640
SF		 3844
3845 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
3846 offset = le16_to_cpu(rsp->OutputBufferOffset);
c1596ff5 3847 rc = validate_iov(server, offset, rsp_len, &rsp_iov, min_len);
2167114c
SF		 3848 if (rc)
3849 goto qfsattr_exit;
3850
3851 if (level == FS_ATTRIBUTE_INFORMATION)
93012bf9 3852 memcpy(&tcon->fsAttrInfo, server->vals->header_preamble_size + offset
34f62640 3853 + (char *)&rsp->hdr, min_t(unsigned int,
2167114c
SF		 3854 rsp_len, max_len));
3855 else if (level == FS_DEVICE_INFORMATION)
93012bf9 3856 memcpy(&tcon->fsDevInfo, server->vals->header_preamble_size + offset
2167114c 3857 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
af6a12ea
SF		 3858 else if (level == FS_SECTOR_SIZE_INFORMATION) {
3859 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
93012bf9 3860 (server->vals->header_preamble_size + offset + (char *)&rsp->hdr);
af6a12ea
SF		 3861 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
3862 tcon->perf_sector_size =
3863 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
3864 }
34f62640
SF		 3865
3866qfsattr_exit:
da502f7d 3867 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
6fc05c25
PS		 3868 return rc;
3869}
f7ba7fe6
PS		 3870
3871int
3872smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
3873 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3874 const __u32 num_lock, struct smb2_lock_element *buf)
3875{
3876 int rc = 0;
3877 struct smb2_lock_req *req = NULL;
3878 struct kvec iov[2];
da502f7d 3879 struct kvec rsp_iov;
f7ba7fe6
PS		 3880 int resp_buf_type;
3881 unsigned int count;
7fb8986e 3882 int flags = CIFS_NO_RESP;
ced93679 3883 unsigned int total_len;
f7ba7fe6 3884
f96637be 3885 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
f7ba7fe6 3886
ced93679 3887 rc = smb2_plain_req_init(SMB2_LOCK, tcon, (void **) &req, &total_len);
f7ba7fe6
PS		 3888 if (rc)
3889 return rc;
3890
5a77e75f 3891 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3892 flags |= CIFS_TRANSFORM_REQ;
3893
ced93679 3894 req->sync_hdr.ProcessId = cpu_to_le32(pid);
f7ba7fe6
PS		 3895 req->LockCount = cpu_to_le16(num_lock);
3896
3897 req->PersistentFileId = persist_fid;
3898 req->VolatileFileId = volatile_fid;
3899
3900 count = num_lock * sizeof(struct smb2_lock_element);
f7ba7fe6
PS		 3901
3902 iov[0].iov_base = (char *)req;
ced93679 3903 iov[0].iov_len = total_len - sizeof(struct smb2_lock_element);
f7ba7fe6
PS		 3904 iov[1].iov_base = (char *)buf;
3905 iov[1].iov_len = count;
3906
3907 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
ced93679
RS		 3908 rc = smb2_send_recv(xid, tcon->ses, iov, 2, &resp_buf_type, flags,
3909 &rsp_iov);
da502f7d 3910 cifs_small_buf_release(req);
f7ba7fe6 3911 if (rc) {
f96637be 3912 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
f7ba7fe6 3913 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
eccb4422
SF		 3914 trace_smb3_lock_err(xid, persist_fid, tcon->tid,
3915 tcon->ses->Suid, rc);
f7ba7fe6
PS		 3916 }
3917
3918 return rc;
3919}
3920
3921int
3922SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
3923 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3924 const __u64 length, const __u64 offset, const __u32 lock_flags,
3925 const bool wait)
3926{
3927 struct smb2_lock_element lock;
3928
3929 lock.Offset = cpu_to_le64(offset);
3930 lock.Length = cpu_to_le64(length);
3931 lock.Flags = cpu_to_le32(lock_flags);
3932 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
3933 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
3934
3935 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
3936}
0822f514
PS		 3937
3938int
3939SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
3940 __u8 *lease_key, const __le32 lease_state)
3941{
3942 int rc;
3943 struct smb2_lease_ack *req = NULL;
8eb7998e 3944 struct cifs_ses *ses = tcon->ses;
7fb8986e 3945 int flags = CIFS_OBREAK_OP;
8eb7998e
RS		 3946 unsigned int total_len;
3947 struct kvec iov[1];
3948 struct kvec rsp_iov;
3949 int resp_buf_type;
0822f514 3950
f96637be 3951 cifs_dbg(FYI, "SMB2_lease_break\n");
8eb7998e
RS		 3952 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
3953 &total_len);
0822f514
PS		 3954 if (rc)
3955 return rc;
3956
5a77e75f 3957 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3958 flags |= CIFS_TRANSFORM_REQ;
3959
8eb7998e 3960 req->sync_hdr.CreditRequest = cpu_to_le16(1);
0822f514 3961 req->StructureSize = cpu_to_le16(36);
8eb7998e 3962 total_len += 12;
0822f514
PS		 3963
3964 memcpy(req->LeaseKey, lease_key, 16);
3965 req->LeaseState = lease_state;
3966
8eb7998e
RS		 3967 flags |= CIFS_NO_RESP;
3968
3969 iov[0].iov_base = (char *)req;
3970 iov[0].iov_len = total_len;
3971
3972 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buf_type, flags, &rsp_iov);
da502f7d 3973 cifs_small_buf_release(req);
0822f514
PS		 3974
3975 if (rc) {
3976 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 3977 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
0822f514
PS		 3978 }
3979
3980 return rc;
3981}
Linux 6.x block layer and io_uring tree(s)