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smb3: increase initial number of credits requested to allow write
[thirdparty/kernel/linux.git] / fs / cifs / smb2pdu.c
CommitLineData
ec2e4523
PS		 1/*
2 * fs/cifs/smb2pdu.c
3 *
2b80d049 4 * Copyright (C) International Business Machines Corp., 2009, 2013
ec2e4523
PS		 5 * Etersoft, 2012
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
8 *
9 * Contains the routines for constructing the SMB2 PDUs themselves
10 *
11 * This library is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published
13 * by the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
15 *
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
19 * the GNU Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 */
25
26 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
27 /* Note that there are handle based routines which must be */
28 /* treated slightly differently for reconnection purposes since we never */
29 /* want to reuse a stale file handle and only the caller knows the file info */
30
31#include <linux/fs.h>
32#include <linux/kernel.h>
33#include <linux/vfs.h>
09a4707e 34#include <linux/task_io_accounting_ops.h>
ec2e4523 35#include <linux/uaccess.h>
c6e970a0 36#include <linux/uuid.h>
33319141 37#include <linux/pagemap.h>
ec2e4523
PS		 38#include <linux/xattr.h>
39#include "smb2pdu.h"
40#include "cifsglob.h"
41#include "cifsacl.h"
42#include "cifsproto.h"
43#include "smb2proto.h"
44#include "cifs_unicode.h"
45#include "cifs_debug.h"
46#include "ntlmssp.h"
47#include "smb2status.h"
09a4707e 48#include "smb2glob.h"
d324f08d 49#include "cifspdu.h"
ceb1b0b9 50#include "cifs_spnego.h"
db223a59 51#include "smbdirect.h"
eccb4422 52#include "trace.h"
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,
977b6170
RS		 468 struct TCP_Server_Info *server,
469 unsigned int len_of_smb)
5100d8a3
SF		 470{
471 struct smb2_neg_context *pctx;
472 unsigned int offset = le32_to_cpu(rsp->NegotiateContextOffset);
473 unsigned int ctxt_cnt = le16_to_cpu(rsp->NegotiateContextCount);
5100d8a3
SF		 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
1fc6ad2f 494 pctx = (struct smb2_neg_context *)(offset + (char *)rsp);
5100d8a3
SF		 495 clen = le16_to_cpu(pctx->DataLength);
496 if (clen > len_of_ctxts)
497 break;
498
499 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES)
500 decode_preauth_context(
501 (struct smb2_preauth_neg_context *)pctx);
502 else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES)
503 rc = decode_encrypt_ctx(server,
504 (struct smb2_encryption_neg_context *)pctx);
fcef0db6
SF		 505 else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE)
506 server->posix_ext_supported = true;
5100d8a3
SF		 507 else
508 cifs_dbg(VFS, "unknown negcontext of type %d ignored\n",
509 le16_to_cpu(pctx->ContextType));
510
511 if (rc)
512 break;
513 /* offsets must be 8 byte aligned */
514 clen = (clen + 7) & ~0x7;
515 offset += clen + sizeof(struct smb2_neg_context);
516 len_of_ctxts -= clen;
517 }
518 return rc;
519}
520
ce558b0e
SF		 521static struct create_posix *
522create_posix_buf(umode_t mode)
523{
524 struct create_posix *buf;
525
526 buf = kzalloc(sizeof(struct create_posix),
527 GFP_KERNEL);
528 if (!buf)
529 return NULL;
530
531 buf->ccontext.DataOffset =
532 cpu_to_le16(offsetof(struct create_posix, Mode));
533 buf->ccontext.DataLength = cpu_to_le32(4);
534 buf->ccontext.NameOffset =
535 cpu_to_le16(offsetof(struct create_posix, Name));
536 buf->ccontext.NameLength = cpu_to_le16(16);
537
538 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
539 buf->Name[0] = 0x93;
540 buf->Name[1] = 0xAD;
541 buf->Name[2] = 0x25;
542 buf->Name[3] = 0x50;
543 buf->Name[4] = 0x9C;
544 buf->Name[5] = 0xB4;
545 buf->Name[6] = 0x11;
546 buf->Name[7] = 0xE7;
547 buf->Name[8] = 0xB4;
548 buf->Name[9] = 0x23;
549 buf->Name[10] = 0x83;
550 buf->Name[11] = 0xDE;
551 buf->Name[12] = 0x96;
552 buf->Name[13] = 0x8B;
553 buf->Name[14] = 0xCD;
554 buf->Name[15] = 0x7C;
555 buf->Mode = cpu_to_le32(mode);
556 cifs_dbg(FYI, "mode on posix create 0%o", mode);
557 return buf;
558}
559
560static int
561add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode)
562{
563 struct smb2_create_req *req = iov[0].iov_base;
564 unsigned int num = *num_iovec;
565
566 iov[num].iov_base = create_posix_buf(mode);
567 if (iov[num].iov_base == NULL)
568 return -ENOMEM;
569 iov[num].iov_len = sizeof(struct create_posix);
570 if (!req->CreateContextsOffset)
571 req->CreateContextsOffset = cpu_to_le32(
572 sizeof(struct smb2_create_req) +
573 iov[num - 1].iov_len);
574 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_posix));
575 *num_iovec = num + 1;
576 return 0;
577}
578
ebb3a9d4 579#else
13cacea7
RS		 580static void assemble_neg_contexts(struct smb2_negotiate_req *req,
581 unsigned int *total_len)
ebb3a9d4
SF		 582{
583 return;
584}
585#endif /* SMB311 */
586
ec2e4523
PS		 587/*
588 *
589 * SMB2 Worker functions follow:
590 *
591 * The general structure of the worker functions is:
592 * 1) Call smb2_init (assembles SMB2 header)
593 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
594 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
595 * 4) Decode SMB2 command specific fields in the fixed length area
596 * 5) Decode variable length data area (if any for this SMB2 command type)
597 * 6) Call free smb buffer
598 * 7) return
599 *
600 */
601
602int
603SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
604{
605 struct smb2_negotiate_req *req;
606 struct smb2_negotiate_rsp *rsp;
607 struct kvec iov[1];
da502f7d 608 struct kvec rsp_iov;
ec2e4523
PS		 609 int rc = 0;
610 int resp_buftype;
3534b850 611 struct TCP_Server_Info *server = ses->server;
ec2e4523
PS		 612 int blob_offset, blob_length;
613 char *security_blob;
614 int flags = CIFS_NEG_OP;
13cacea7 615 unsigned int total_len;
ec2e4523 616
f96637be 617 cifs_dbg(FYI, "Negotiate protocol\n");
ec2e4523 618
3534b850
JL		 619 if (!server) {
620 WARN(1, "%s: server is NULL!\n", __func__);
621 return -EIO;
ec2e4523
PS		 622 }
623
13cacea7 624 rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, (void **) &req, &total_len);
ec2e4523
PS		 625 if (rc)
626 return rc;
627
13cacea7 628 req->sync_hdr.SessionId = 0;
8bd68c6e
AA		 629#ifdef CONFIG_CIFS_SMB311
630 memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
631 memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
632#endif
ec2e4523 633
9764c02f
SF		 634 if (strcmp(ses->server->vals->version_string,
635 SMB3ANY_VERSION_STRING) == 0) {
636 req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
637 req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
638 req->DialectCount = cpu_to_le16(2);
13cacea7 639 total_len += 4;
9764c02f
SF		 640 } else if (strcmp(ses->server->vals->version_string,
641 SMBDEFAULT_VERSION_STRING) == 0) {
642 req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
643 req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
644 req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
645 req->DialectCount = cpu_to_le16(3);
13cacea7 646 total_len += 6;
9764c02f
SF		 647 } else {
648 /* otherwise send specific dialect */
649 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
650 req->DialectCount = cpu_to_le16(1);
13cacea7 651 total_len += 2;
9764c02f 652 }
ec2e4523
PS		 653
654 /* only one of SMB2 signing flags may be set in SMB2 request */
38d77c50 655 if (ses->sign)
9cd2e62c 656 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
38d77c50 657 else if (global_secflags & CIFSSEC_MAY_SIGN)
9cd2e62c 658 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
38d77c50
JL		 659 else
660 req->SecurityMode = 0;
ec2e4523 661
e4aa25e7 662 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
ec2e4523 663
3c5f9be1
SF		 664 /* ClientGUID must be zero for SMB2.02 dialect */
665 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
666 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
ebb3a9d4 667 else {
3c5f9be1
SF		 668 memcpy(req->ClientGUID, server->client_guid,
669 SMB2_CLIENT_GUID_SIZE);
ebb3a9d4 670 if (ses->server->vals->protocol_id == SMB311_PROT_ID)
13cacea7 671 assemble_neg_contexts(req, &total_len);
ebb3a9d4 672 }
ec2e4523 673 iov[0].iov_base = (char *)req;
13cacea7 674 iov[0].iov_len = total_len;
ec2e4523 675
13cacea7 676 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 677 cifs_small_buf_release(req);
678 rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base;
ec2e4523
PS		 679 /*
680 * No tcon so can't do
681 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
682 */
7e682f76
SF		 683 if (rc == -EOPNOTSUPP) {
684 cifs_dbg(VFS, "Dialect not supported by server. Consider "
9764c02f 685 "specifying vers=1.0 or vers=2.0 on mount for accessing"
7e682f76
SF		 686 " older servers\n");
687 goto neg_exit;
688 } else if (rc != 0)
ec2e4523
PS		 689 goto neg_exit;
690
9764c02f
SF		 691 if (strcmp(ses->server->vals->version_string,
692 SMB3ANY_VERSION_STRING) == 0) {
693 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
694 cifs_dbg(VFS,
695 "SMB2 dialect returned but not requested\n");
696 return -EIO;
697 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
698 cifs_dbg(VFS,
699 "SMB2.1 dialect returned but not requested\n");
700 return -EIO;
701 }
702 } else if (strcmp(ses->server->vals->version_string,
703 SMBDEFAULT_VERSION_STRING) == 0) {
704 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
705 cifs_dbg(VFS,
706 "SMB2 dialect returned but not requested\n");
707 return -EIO;
708 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
709 /* ops set to 3.0 by default for default so update */
710 ses->server->ops = &smb21_operations;
711 }
590d08d3
SF		 712 } else if (le16_to_cpu(rsp->DialectRevision) !=
713 ses->server->vals->protocol_id) {
9764c02f
SF		 714 /* if requested single dialect ensure returned dialect matched */
715 cifs_dbg(VFS, "Illegal 0x%x dialect returned: not requested\n",
590d08d3 716 le16_to_cpu(rsp->DialectRevision));
9764c02f
SF		 717 return -EIO;
718 }
719
f96637be 720 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
ec2e4523 721
e4aa25e7 722 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
f96637be 723 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
e4aa25e7 724 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
f96637be 725 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
e4aa25e7 726 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
f96637be 727 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
20b6d8b4
SF		 728 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
729 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
5f7fbf73
SF		 730#ifdef CONFIG_CIFS_SMB311
731 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
732 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
733#endif /* SMB311 */
ec2e4523 734 else {
f799d623 735 cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
f96637be 736 le16_to_cpu(rsp->DialectRevision));
ec2e4523
PS		 737 rc = -EIO;
738 goto neg_exit;
739 }
740 server->dialect = le16_to_cpu(rsp->DialectRevision);
741
9764c02f
SF		 742 /* BB: add check that dialect was valid given dialect(s) we asked for */
743
8bd68c6e
AA		 744#ifdef CONFIG_CIFS_SMB311
745 /*
746 * Keep a copy of the hash after negprot. This hash will be
747 * the starting hash value for all sessions made from this
748 * server.
749 */
750 memcpy(server->preauth_sha_hash, ses->preauth_sha_hash,
751 SMB2_PREAUTH_HASH_SIZE);
752#endif
e598d1d8
JL		 753 /* SMB2 only has an extended negflavor */
754 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
2365c4ea
PS		 755 /* set it to the maximum buffer size value we can send with 1 credit */
756 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
757 SMB2_MAX_BUFFER_SIZE);
ec2e4523
PS		 758 server->max_read = le32_to_cpu(rsp->MaxReadSize);
759 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
ec2e4523 760 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
07108d0e
SF		 761 if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode)
762 cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n",
763 server->sec_mode);
ec2e4523 764 server->capabilities = le32_to_cpu(rsp->Capabilities);
29e20f9c
PS		 765 /* Internal types */
766 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
ec2e4523
PS		 767
768 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
49f466bd 769 (struct smb2_sync_hdr *)rsp);
5d875cc9
SF		 770 /*
771 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
772 * for us will be
773 * ses->sectype = RawNTLMSSP;
774 * but for time being this is our only auth choice so doesn't matter.
775 * We just found a server which sets blob length to zero expecting raw.
776 */
67dbea2c 777 if (blob_length == 0) {
5d875cc9 778 cifs_dbg(FYI, "missing security blob on negprot\n");
67dbea2c
PS		 779 server->sec_ntlmssp = true;
780 }
3c1bf7e4 781
38d77c50 782 rc = cifs_enable_signing(server, ses->sign);
9ddec561
JL		 783 if (rc)
784 goto neg_exit;
ceb1b0b9 785 if (blob_length) {
ebdd207e 786 rc = decode_negTokenInit(security_blob, blob_length, server);
ceb1b0b9
SF		 787 if (rc == 1)
788 rc = 0;
789 else if (rc == 0)
790 rc = -EIO;
ec2e4523 791 }
5100d8a3
SF		 792
793#ifdef CONFIG_CIFS_SMB311
794 if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
795 if (rsp->NegotiateContextCount)
977b6170
RS		 796 rc = smb311_decode_neg_context(rsp, server,
797 rsp_iov.iov_len);
5100d8a3
SF		 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 */
d409014e
SF		 993
994 /* enough to enable echos and oplocks and one max size write */
995 req->sync_hdr.CreditRequest = cpu_to_le16(130);
3baf1a7b
SP		 996
997 /* only one of SMB2 signing flags may be set in SMB2 request */
998 if (server->sign)
999 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
1000 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
1001 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
1002 else
1003 req->SecurityMode = 0;
1004
1005 req->Capabilities = 0;
1006 req->Channel = 0; /* MBZ */
1007
1008 sess_data->iov[0].iov_base = (char *)req;
88ea5cb7
RS		 1009 /* 1 for pad */
1010 sess_data->iov[0].iov_len = total_len - 1;
3baf1a7b
SP		 1011 /*
1012 * This variable will be used to clear the buffer
1013 * allocated above in case of any error in the calling function.
1014 */
1015 sess_data->buf0_type = CIFS_SMALL_BUFFER;
1016
1017 return 0;
1018}
1019
1020static void
1021SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
1022{
1023 free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
1024 sess_data->buf0_type = CIFS_NO_BUFFER;
1025}
1026
1027static int
1028SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
1029{
1030 int rc;
1031 struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
da502f7d 1032 struct kvec rsp_iov = { NULL, 0 };
3baf1a7b
SP		 1033
1034 /* Testing shows that buffer offset must be at location of Buffer[0] */
1035 req->SecurityBufferOffset =
88ea5cb7 1036 cpu_to_le16(sizeof(struct smb2_sess_setup_req) - 1 /* pad */);
3baf1a7b
SP		 1037 req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
1038
3baf1a7b
SP		 1039 /* BB add code to build os and lm fields */
1040
88ea5cb7
RS		 1041 rc = smb2_send_recv(sess_data->xid, sess_data->ses,
1042 sess_data->iov, 2,
1043 &sess_data->buf0_type,
1044 CIFS_LOG_ERROR | CIFS_NEG_OP, &rsp_iov);
da502f7d
PS		 1045 cifs_small_buf_release(sess_data->iov[0].iov_base);
1046 memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
3baf1a7b
SP		 1047
1048 return rc;
1049}
1050
1051static int
1052SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
1053{
1054 int rc = 0;
1055 struct cifs_ses *ses = sess_data->ses;
1056
1057 mutex_lock(&ses->server->srv_mutex);
cabfb368 1058 if (ses->server->ops->generate_signingkey) {
3baf1a7b 1059 rc = ses->server->ops->generate_signingkey(ses);
3baf1a7b
SP		 1060 if (rc) {
1061 cifs_dbg(FYI,
1062 "SMB3 session key generation failed\n");
1063 mutex_unlock(&ses->server->srv_mutex);
cabfb368 1064 return rc;
3baf1a7b
SP		 1065 }
1066 }
1067 if (!ses->server->session_estab) {
1068 ses->server->sequence_number = 0x2;
1069 ses->server->session_estab = true;
1070 }
1071 mutex_unlock(&ses->server->srv_mutex);
1072
1073 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
1074 spin_lock(&GlobalMid_Lock);
1075 ses->status = CifsGood;
1076 ses->need_reconnect = false;
1077 spin_unlock(&GlobalMid_Lock);
3baf1a7b
SP		 1078 return rc;
1079}
1080
1081#ifdef CONFIG_CIFS_UPCALL
1082static void
1083SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1084{
1085 int rc;
1086 struct cifs_ses *ses = sess_data->ses;
1087 struct cifs_spnego_msg *msg;
1088 struct key *spnego_key = NULL;
1089 struct smb2_sess_setup_rsp *rsp = NULL;
1090
1091 rc = SMB2_sess_alloc_buffer(sess_data);
1092 if (rc)
1093 goto out;
1094
1095 spnego_key = cifs_get_spnego_key(ses);
1096 if (IS_ERR(spnego_key)) {
1097 rc = PTR_ERR(spnego_key);
1098 spnego_key = NULL;
1099 goto out;
1100 }
1101
1102 msg = spnego_key->payload.data[0];
1103 /*
1104 * check version field to make sure that cifs.upcall is
1105 * sending us a response in an expected form
1106 */
1107 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
1108 cifs_dbg(VFS,
1109 "bad cifs.upcall version. Expected %d got %d",
1110 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
1111 rc = -EKEYREJECTED;
1112 goto out_put_spnego_key;
1113 }
1114
1115 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
1116 GFP_KERNEL);
1117 if (!ses->auth_key.response) {
1118 cifs_dbg(VFS,
1119 "Kerberos can't allocate (%u bytes) memory",
1120 msg->sesskey_len);
1121 rc = -ENOMEM;
1122 goto out_put_spnego_key;
1123 }
1124 ses->auth_key.len = msg->sesskey_len;
1125
1126 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
1127 sess_data->iov[1].iov_len = msg->secblob_len;
1128
1129 rc = SMB2_sess_sendreceive(sess_data);
1130 if (rc)
1131 goto out_put_spnego_key;
1132
1133 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
49f466bd 1134 ses->Suid = rsp->sync_hdr.SessionId;
3baf1a7b
SP		 1135
1136 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
3baf1a7b
SP		 1137
1138 rc = SMB2_sess_establish_session(sess_data);
1139out_put_spnego_key:
1140 key_invalidate(spnego_key);
1141 key_put(spnego_key);
1142out:
1143 sess_data->result = rc;
1144 sess_data->func = NULL;
1145 SMB2_sess_free_buffer(sess_data);
1146}
1147#else
1148static void
1149SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1150{
1151 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
1152 sess_data->result = -EOPNOTSUPP;
1153 sess_data->func = NULL;
1154}
1155#endif
1156
166cea4d
SP		 1157static void
1158SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
1159
1160static void
1161SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
5478f9ba 1162{
166cea4d
SP		 1163 int rc;
1164 struct cifs_ses *ses = sess_data->ses;
5478f9ba 1165 struct smb2_sess_setup_rsp *rsp = NULL;
166cea4d 1166 char *ntlmssp_blob = NULL;
5478f9ba 1167 bool use_spnego = false; /* else use raw ntlmssp */
166cea4d 1168 u16 blob_length = 0;
d4e63bd6 1169
5478f9ba
PS		 1170 /*
1171 * If memory allocation is successful, caller of this function
1172 * frees it.
1173 */
1174 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
166cea4d
SP		 1175 if (!ses->ntlmssp) {
1176 rc = -ENOMEM;
1177 goto out_err;
1178 }
5c234aa5 1179 ses->ntlmssp->sesskey_per_smbsess = true;
5478f9ba 1180
166cea4d 1181 rc = SMB2_sess_alloc_buffer(sess_data);
5478f9ba 1182 if (rc)
166cea4d 1183 goto out_err;
5478f9ba 1184
166cea4d
SP		 1185 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
1186 GFP_KERNEL);
1187 if (ntlmssp_blob == NULL) {
1188 rc = -ENOMEM;
1189 goto out;
1190 }
c2afb814 1191
166cea4d
SP		 1192 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
1193 if (use_spnego) {
1194 /* BB eventually need to add this */
1195 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1196 rc = -EOPNOTSUPP;
1197 goto out;
1198 } else {
1199 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
1200 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
1201 }
1202 sess_data->iov[1].iov_base = ntlmssp_blob;
1203 sess_data->iov[1].iov_len = blob_length;
c2afb814 1204
166cea4d
SP		 1205 rc = SMB2_sess_sendreceive(sess_data);
1206 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
5478f9ba 1207
166cea4d
SP		 1208 /* If true, rc here is expected and not an error */
1209 if (sess_data->buf0_type != CIFS_NO_BUFFER &&
49f466bd 1210 rsp->sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
166cea4d 1211 rc = 0;
38d77c50 1212
166cea4d
SP		 1213 if (rc)
1214 goto out;
5478f9ba 1215
1fc6ad2f 1216 if (offsetof(struct smb2_sess_setup_rsp, Buffer) !=
166cea4d
SP		 1217 le16_to_cpu(rsp->SecurityBufferOffset)) {
1218 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
1219 le16_to_cpu(rsp->SecurityBufferOffset));
5478f9ba 1220 rc = -EIO;
166cea4d 1221 goto out;
5478f9ba 1222 }
166cea4d
SP		 1223 rc = decode_ntlmssp_challenge(rsp->Buffer,
1224 le16_to_cpu(rsp->SecurityBufferLength), ses);
1225 if (rc)
1226 goto out;
5478f9ba 1227
166cea4d 1228 cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
5478f9ba 1229
5478f9ba 1230
49f466bd 1231 ses->Suid = rsp->sync_hdr.SessionId;
166cea4d 1232 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
166cea4d
SP		 1233
1234out:
1235 kfree(ntlmssp_blob);
1236 SMB2_sess_free_buffer(sess_data);
1237 if (!rc) {
1238 sess_data->result = 0;
1239 sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
1240 return;
1241 }
1242out_err:
1243 kfree(ses->ntlmssp);
1244 ses->ntlmssp = NULL;
1245 sess_data->result = rc;
1246 sess_data->func = NULL;
1247}
5478f9ba 1248
166cea4d
SP		 1249static void
1250SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
1251{
1252 int rc;
1253 struct cifs_ses *ses = sess_data->ses;
1254 struct smb2_sess_setup_req *req;
1255 struct smb2_sess_setup_rsp *rsp = NULL;
1256 unsigned char *ntlmssp_blob = NULL;
1257 bool use_spnego = false; /* else use raw ntlmssp */
1258 u16 blob_length = 0;
5478f9ba 1259
166cea4d
SP		 1260 rc = SMB2_sess_alloc_buffer(sess_data);
1261 if (rc)
1262 goto out;
5478f9ba 1263
166cea4d 1264 req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
88ea5cb7 1265 req->sync_hdr.SessionId = ses->Suid;
166cea4d
SP		 1266
1267 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
1268 sess_data->nls_cp);
1269 if (rc) {
1270 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
1271 goto out;
5478f9ba
PS		 1272 }
1273
166cea4d
SP		 1274 if (use_spnego) {
1275 /* BB eventually need to add this */
1276 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1277 rc = -EOPNOTSUPP;
1278 goto out;
1279 }
1280 sess_data->iov[1].iov_base = ntlmssp_blob;
1281 sess_data->iov[1].iov_len = blob_length;
5478f9ba 1282
166cea4d
SP		 1283 rc = SMB2_sess_sendreceive(sess_data);
1284 if (rc)
1285 goto out;
1286
1287 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1288
49f466bd 1289 ses->Suid = rsp->sync_hdr.SessionId;
5478f9ba 1290 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
5478f9ba 1291
166cea4d
SP		 1292 rc = SMB2_sess_establish_session(sess_data);
1293out:
1294 kfree(ntlmssp_blob);
1295 SMB2_sess_free_buffer(sess_data);
1296 kfree(ses->ntlmssp);
1297 ses->ntlmssp = NULL;
1298 sess_data->result = rc;
1299 sess_data->func = NULL;
1300}
d4e63bd6 1301
166cea4d
SP		 1302static int
1303SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data)
1304{
ef65aaed
SP		 1305 int type;
1306
1307 type = smb2_select_sectype(ses->server, ses->sectype);
1308 cifs_dbg(FYI, "sess setup type %d\n", type);
1309 if (type == Unspecified) {
1310 cifs_dbg(VFS,
1311 "Unable to select appropriate authentication method!");
1312 return -EINVAL;
1313 }
d4e63bd6 1314
ef65aaed 1315 switch (type) {
166cea4d
SP		 1316 case Kerberos:
1317 sess_data->func = SMB2_auth_kerberos;
1318 break;
1319 case RawNTLMSSP:
1320 sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
1321 break;
1322 default:
ef65aaed 1323 cifs_dbg(VFS, "secType %d not supported!\n", type);
166cea4d 1324 return -EOPNOTSUPP;
d4e63bd6
SP		 1325 }
1326
166cea4d
SP		 1327 return 0;
1328}
1329
1330int
1331SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
1332 const struct nls_table *nls_cp)
1333{
1334 int rc = 0;
1335 struct TCP_Server_Info *server = ses->server;
1336 struct SMB2_sess_data *sess_data;
1337
1338 cifs_dbg(FYI, "Session Setup\n");
1339
1340 if (!server) {
1341 WARN(1, "%s: server is NULL!\n", __func__);
1342 return -EIO;
d4e63bd6 1343 }
d4e63bd6 1344
166cea4d
SP		 1345 sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
1346 if (!sess_data)
1347 return -ENOMEM;
1348
1349 rc = SMB2_select_sec(ses, sess_data);
1350 if (rc)
1351 goto out;
1352 sess_data->xid = xid;
1353 sess_data->ses = ses;
1354 sess_data->buf0_type = CIFS_NO_BUFFER;
1355 sess_data->nls_cp = (struct nls_table *) nls_cp;
b2adf22f 1356 sess_data->previous_session = ses->Suid;
166cea4d 1357
8bd68c6e
AA		 1358#ifdef CONFIG_CIFS_SMB311
1359 /*
1360 * Initialize the session hash with the server one.
1361 */
1362 memcpy(ses->preauth_sha_hash, ses->server->preauth_sha_hash,
1363 SMB2_PREAUTH_HASH_SIZE);
1364#endif
1365
166cea4d
SP		 1366 while (sess_data->func)
1367 sess_data->func(sess_data);
1368
c721c389
SF		 1369 if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign))
1370 cifs_dbg(VFS, "signing requested but authenticated as guest\n");
3baf1a7b 1371 rc = sess_data->result;
166cea4d 1372out:
3baf1a7b 1373 kfree(sess_data);
5478f9ba
PS		 1374 return rc;
1375}
1376
1377int
1378SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
1379{
1380 struct smb2_logoff_req *req; /* response is also trivial struct */
1381 int rc = 0;
1382 struct TCP_Server_Info *server;
7fb8986e 1383 int flags = 0;
45305eda
RS		 1384 unsigned int total_len;
1385 struct kvec iov[1];
1386 struct kvec rsp_iov;
1387 int resp_buf_type;
5478f9ba 1388
f96637be 1389 cifs_dbg(FYI, "disconnect session %p\n", ses);
5478f9ba
PS		 1390
1391 if (ses && (ses->server))
1392 server = ses->server;
1393 else
1394 return -EIO;
1395
eb4c7df6
SP		 1396 /* no need to send SMB logoff if uid already closed due to reconnect */
1397 if (ses->need_reconnect)
1398 goto smb2_session_already_dead;
1399
45305eda 1400 rc = smb2_plain_req_init(SMB2_LOGOFF, NULL, (void **) &req, &total_len);
5478f9ba
PS		 1401 if (rc)
1402 return rc;
1403
1404 /* since no tcon, smb2_init can not do this, so do here */
45305eda 1405 req->sync_hdr.SessionId = ses->Suid;
7fb8986e
PS		 1406
1407 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
1408 flags |= CIFS_TRANSFORM_REQ;
1409 else if (server->sign)
45305eda
RS		 1410 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1411
1412 flags |= CIFS_NO_RESP;
1413
1414 iov[0].iov_base = (char *)req;
1415 iov[0].iov_len = total_len;
5478f9ba 1416
45305eda 1417 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buf_type, flags, &rsp_iov);
da502f7d 1418 cifs_small_buf_release(req);
5478f9ba
PS		 1419 /*
1420 * No tcon so can't do
1421 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1422 */
eb4c7df6
SP		 1423
1424smb2_session_already_dead:
5478f9ba
PS		 1425 return rc;
1426}
faaf946a
PS		 1427
1428static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
1429{
d60622eb 1430 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
faaf946a
PS		 1431}
1432
1433#define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1434
de9f68df
SF		 1435/* These are similar values to what Windows uses */
1436static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
1437{
1438 tcon->max_chunks = 256;
1439 tcon->max_bytes_chunk = 1048576;
1440 tcon->max_bytes_copy = 16777216;
1441}
1442
faaf946a
PS		 1443int
1444SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
1445 struct cifs_tcon *tcon, const struct nls_table *cp)
1446{
1447 struct smb2_tree_connect_req *req;
1448 struct smb2_tree_connect_rsp *rsp = NULL;
1449 struct kvec iov[2];
db3b5474 1450 struct kvec rsp_iov = { NULL, 0 };
faaf946a
PS		 1451 int rc = 0;
1452 int resp_buftype;
1453 int unc_path_len;
faaf946a 1454 __le16 *unc_path = NULL;
7fb8986e 1455 int flags = 0;
661bb943 1456 unsigned int total_len;
faaf946a 1457
f96637be 1458 cifs_dbg(FYI, "TCON\n");
faaf946a 1459
68a6afa7 1460 if (!(ses->server) || !tree)
faaf946a
PS		 1461 return -EIO;
1462
faaf946a
PS		 1463 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
1464 if (unc_path == NULL)
1465 return -ENOMEM;
1466
1467 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
1468 unc_path_len *= 2;
1469 if (unc_path_len < 2) {
1470 kfree(unc_path);
1471 return -EINVAL;
1472 }
1473
806a28ef 1474 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
b327a717 1475 tcon->tid = 0;
806a28ef 1476
661bb943
RS		 1477 rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, (void **) &req,
1478 &total_len);
faaf946a
PS		 1479 if (rc) {
1480 kfree(unc_path);
1481 return rc;
1482 }
1483
5a77e75f 1484 if (smb3_encryption_required(tcon))
ae6f8dd4 1485 flags |= CIFS_TRANSFORM_REQ;
faaf946a
PS		 1486
1487 iov[0].iov_base = (char *)req;
661bb943
RS		 1488 /* 1 for pad */
1489 iov[0].iov_len = total_len - 1;
faaf946a
PS		 1490
1491 /* Testing shows that buffer offset must be at location of Buffer[0] */
1492 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
661bb943 1493 - 1 /* pad */);
faaf946a
PS		 1494 req->PathLength = cpu_to_le16(unc_path_len - 2);
1495 iov[1].iov_base = unc_path;
1496 iov[1].iov_len = unc_path_len;
1497
6188f28b
SF		 1498 /* 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 */
1499 if ((ses->server->dialect == SMB311_PROT_ID) &&
5a77e75f 1500 !smb3_encryption_required(tcon))
6188f28b
SF		 1501 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1502
661bb943 1503 rc = smb2_send_recv(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1504 cifs_small_buf_release(req);
1505 rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
faaf946a
PS		 1506
1507 if (rc != 0) {
1508 if (tcon) {
1509 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
1510 tcon->need_reconnect = true;
1511 }
1512 goto tcon_error_exit;
1513 }
1514
cd123007
CJ		 1515 switch (rsp->ShareType) {
1516 case SMB2_SHARE_TYPE_DISK:
f96637be 1517 cifs_dbg(FYI, "connection to disk share\n");
cd123007
CJ		 1518 break;
1519 case SMB2_SHARE_TYPE_PIPE:
b327a717 1520 tcon->pipe = true;
f96637be 1521 cifs_dbg(FYI, "connection to pipe share\n");
cd123007
CJ		 1522 break;
1523 case SMB2_SHARE_TYPE_PRINT:
b327a717 1524 tcon->print = true;
f96637be 1525 cifs_dbg(FYI, "connection to printer\n");
cd123007
CJ		 1526 break;
1527 default:
f96637be 1528 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
faaf946a
PS		 1529 rc = -EOPNOTSUPP;
1530 goto tcon_error_exit;
1531 }
1532
1533 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
769ee6a4 1534 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
faaf946a
PS		 1535 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1536 tcon->tidStatus = CifsGood;
1537 tcon->need_reconnect = false;
49f466bd 1538 tcon->tid = rsp->sync_hdr.TreeId;
46b51d08 1539 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
faaf946a
PS		 1540
1541 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1542 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
f96637be 1543 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
ae6f8dd4
PS		 1544
1545 if (tcon->seal &&
1546 !(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
1547 cifs_dbg(VFS, "Encryption is requested but not supported\n");
1548
de9f68df 1549 init_copy_chunk_defaults(tcon);
ff1c038a
SF		 1550 if (tcon->ses->server->ops->validate_negotiate)
1551 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
faaf946a
PS		 1552tcon_exit:
1553 free_rsp_buf(resp_buftype, rsp);
1554 kfree(unc_path);
1555 return rc;
1556
1557tcon_error_exit:
49f466bd 1558 if (rsp && rsp->sync_hdr.Status == STATUS_BAD_NETWORK_NAME) {
f96637be 1559 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
faaf946a
PS		 1560 }
1561 goto tcon_exit;
1562}
1563
1564int
1565SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1566{
1567 struct smb2_tree_disconnect_req *req; /* response is trivial */
1568 int rc = 0;
faaf946a 1569 struct cifs_ses *ses = tcon->ses;
7fb8986e 1570 int flags = 0;
4eecf4cf
RS		 1571 unsigned int total_len;
1572 struct kvec iov[1];
1573 struct kvec rsp_iov;
1574 int resp_buf_type;
faaf946a 1575
f96637be 1576 cifs_dbg(FYI, "Tree Disconnect\n");
faaf946a 1577
68a6afa7 1578 if (!ses || !(ses->server))
faaf946a
PS		 1579 return -EIO;
1580
1581 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1582 return 0;
1583
4eecf4cf
RS		 1584 rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req,
1585 &total_len);
faaf946a
PS		 1586 if (rc)
1587 return rc;
1588
5a77e75f 1589 if (smb3_encryption_required(tcon))
7fb8986e
PS		 1590 flags |= CIFS_TRANSFORM_REQ;
1591
4eecf4cf
RS		 1592 flags |= CIFS_NO_RESP;
1593
1594 iov[0].iov_base = (char *)req;
1595 iov[0].iov_len = total_len;
1596
1597 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buf_type, flags, &rsp_iov);
da502f7d 1598 cifs_small_buf_release(req);
faaf946a
PS		 1599 if (rc)
1600 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1601
1602 return rc;
1603}
2503a0db 1604
b8c32dbb 1605
63eb3def
PS		 1606static struct create_durable *
1607create_durable_buf(void)
1608{
1609 struct create_durable *buf;
1610
1611 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1612 if (!buf)
1613 return NULL;
1614
1615 buf->ccontext.DataOffset = cpu_to_le16(offsetof
9cbc0b73 1616 (struct create_durable, Data));
63eb3def
PS		 1617 buf->ccontext.DataLength = cpu_to_le32(16);
1618 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1619 (struct create_durable, Name));
1620 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 1621 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
63eb3def
PS		 1622 buf->Name[0] = 'D';
1623 buf->Name[1] = 'H';
1624 buf->Name[2] = 'n';
1625 buf->Name[3] = 'Q';
1626 return buf;
1627}
1628
9cbc0b73
PS		 1629static struct create_durable *
1630create_reconnect_durable_buf(struct cifs_fid *fid)
1631{
1632 struct create_durable *buf;
1633
1634 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1635 if (!buf)
1636 return NULL;
1637
1638 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1639 (struct create_durable, Data));
1640 buf->ccontext.DataLength = cpu_to_le32(16);
1641 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1642 (struct create_durable, Name));
1643 buf->ccontext.NameLength = cpu_to_le16(4);
1644 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1645 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
12197a7f 1646 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
9cbc0b73
PS		 1647 buf->Name[0] = 'D';
1648 buf->Name[1] = 'H';
1649 buf->Name[2] = 'n';
1650 buf->Name[3] = 'C';
1651 return buf;
1652}
1653
b8c32dbb 1654static __u8
42873b0a 1655parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
96164ab2 1656 unsigned int *epoch, char *lease_key)
b8c32dbb
PS		 1657{
1658 char *data_offset;
b5c7cde3 1659 struct create_context *cc;
deb7deff
JM		 1660 unsigned int next;
1661 unsigned int remaining;
fd554396 1662 char *name;
b8c32dbb 1663
1fc6ad2f 1664 data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset);
deb7deff 1665 remaining = le32_to_cpu(rsp->CreateContextsLength);
b5c7cde3 1666 cc = (struct create_context *)data_offset;
deb7deff 1667 while (remaining >= sizeof(struct create_context)) {
b5c7cde3 1668 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
deb7deff
JM		 1669 if (le16_to_cpu(cc->NameLength) == 4 &&
1670 strncmp(name, "RqLs", 4) == 0)
96164ab2
RS		 1671 return server->ops->parse_lease_buf(cc, epoch,
1672 lease_key);
deb7deff
JM		 1673
1674 next = le32_to_cpu(cc->Next);
1675 if (!next)
1676 break;
1677 remaining -= next;
1678 cc = (struct create_context *)((char *)cc + next);
1679 }
b8c32dbb 1680
b5c7cde3 1681 return 0;
b8c32dbb
PS		 1682}
1683
d22cbfec 1684static int
a41a28bd
PS		 1685add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1686 unsigned int *num_iovec, __u8 *oplock)
d22cbfec
PS		 1687{
1688 struct smb2_create_req *req = iov[0].iov_base;
1689 unsigned int num = *num_iovec;
1690
a41a28bd 1691 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
d22cbfec
PS		 1692 if (iov[num].iov_base == NULL)
1693 return -ENOMEM;
a41a28bd 1694 iov[num].iov_len = server->vals->create_lease_size;
d22cbfec
PS		 1695 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1696 if (!req->CreateContextsOffset)
1697 req->CreateContextsOffset = cpu_to_le32(
4f33bc35 1698 sizeof(struct smb2_create_req) +
d22cbfec 1699 iov[num - 1].iov_len);
a41a28bd
PS		 1700 le32_add_cpu(&req->CreateContextsLength,
1701 server->vals->create_lease_size);
d22cbfec
PS		 1702 *num_iovec = num + 1;
1703 return 0;
1704}
1705
b56eae4d
SF		 1706static struct create_durable_v2 *
1707create_durable_v2_buf(struct cifs_fid *pfid)
1708{
1709 struct create_durable_v2 *buf;
1710
1711 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
1712 if (!buf)
1713 return NULL;
1714
1715 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1716 (struct create_durable_v2, dcontext));
1717 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
1718 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1719 (struct create_durable_v2, Name));
1720 buf->ccontext.NameLength = cpu_to_le16(4);
1721
1722 buf->dcontext.Timeout = 0; /* Should this be configurable by workload */
1723 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
fa70b87c 1724 generate_random_uuid(buf->dcontext.CreateGuid);
b56eae4d
SF		 1725 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
1726
1727 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1728 buf->Name[0] = 'D';
1729 buf->Name[1] = 'H';
1730 buf->Name[2] = '2';
1731 buf->Name[3] = 'Q';
1732 return buf;
1733}
1734
1735static struct create_durable_handle_reconnect_v2 *
1736create_reconnect_durable_v2_buf(struct cifs_fid *fid)
1737{
1738 struct create_durable_handle_reconnect_v2 *buf;
1739
1740 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
1741 GFP_KERNEL);
1742 if (!buf)
1743 return NULL;
1744
1745 buf->ccontext.DataOffset =
1746 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1747 dcontext));
1748 buf->ccontext.DataLength =
1749 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
1750 buf->ccontext.NameOffset =
1751 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1752 Name));
1753 buf->ccontext.NameLength = cpu_to_le16(4);
1754
1755 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
1756 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
1757 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1758 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
1759
1760 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1761 buf->Name[0] = 'D';
1762 buf->Name[1] = 'H';
1763 buf->Name[2] = '2';
1764 buf->Name[3] = 'C';
1765 return buf;
1766}
1767
63eb3def 1768static int
b56eae4d
SF		 1769add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
1770 struct cifs_open_parms *oparms)
1771{
1772 struct smb2_create_req *req = iov[0].iov_base;
1773 unsigned int num = *num_iovec;
1774
1775 iov[num].iov_base = create_durable_v2_buf(oparms->fid);
1776 if (iov[num].iov_base == NULL)
1777 return -ENOMEM;
1778 iov[num].iov_len = sizeof(struct create_durable_v2);
1779 if (!req->CreateContextsOffset)
1780 req->CreateContextsOffset =
4f33bc35 1781 cpu_to_le32(sizeof(struct smb2_create_req) +
b56eae4d
SF		 1782 iov[1].iov_len);
1783 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
b56eae4d
SF		 1784 *num_iovec = num + 1;
1785 return 0;
1786}
1787
1788static int
1789add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
9cbc0b73 1790 struct cifs_open_parms *oparms)
63eb3def
PS		 1791{
1792 struct smb2_create_req *req = iov[0].iov_base;
1793 unsigned int num = *num_iovec;
1794
b56eae4d
SF		 1795 /* indicate that we don't need to relock the file */
1796 oparms->reconnect = false;
1797
1798 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
1799 if (iov[num].iov_base == NULL)
1800 return -ENOMEM;
1801 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
1802 if (!req->CreateContextsOffset)
1803 req->CreateContextsOffset =
4f33bc35 1804 cpu_to_le32(sizeof(struct smb2_create_req) +
b56eae4d
SF		 1805 iov[1].iov_len);
1806 le32_add_cpu(&req->CreateContextsLength,
1807 sizeof(struct create_durable_handle_reconnect_v2));
b56eae4d
SF		 1808 *num_iovec = num + 1;
1809 return 0;
1810}
1811
1812static int
1813add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1814 struct cifs_open_parms *oparms, bool use_persistent)
1815{
1816 struct smb2_create_req *req = iov[0].iov_base;
1817 unsigned int num = *num_iovec;
1818
1819 if (use_persistent) {
1820 if (oparms->reconnect)
1821 return add_durable_reconnect_v2_context(iov, num_iovec,
1822 oparms);
1823 else
1824 return add_durable_v2_context(iov, num_iovec, oparms);
1825 }
1826
9cbc0b73
PS		 1827 if (oparms->reconnect) {
1828 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1829 /* indicate that we don't need to relock the file */
1830 oparms->reconnect = false;
1831 } else
1832 iov[num].iov_base = create_durable_buf();
63eb3def
PS		 1833 if (iov[num].iov_base == NULL)
1834 return -ENOMEM;
1835 iov[num].iov_len = sizeof(struct create_durable);
1836 if (!req->CreateContextsOffset)
1837 req->CreateContextsOffset =
4f33bc35 1838 cpu_to_le32(sizeof(struct smb2_create_req) +
63eb3def 1839 iov[1].iov_len);
31f92e9a 1840 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
63eb3def
PS		 1841 *num_iovec = num + 1;
1842 return 0;
1843}
1844
f0712928
AA		 1845static int
1846alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
1847 const char *treename, const __le16 *path)
1848{
1849 int treename_len, path_len;
1850 struct nls_table *cp;
1851 const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
1852
1853 /*
1854 * skip leading "\\"
1855 */
1856 treename_len = strlen(treename);
1857 if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\'))
1858 return -EINVAL;
1859
1860 treename += 2;
1861 treename_len -= 2;
1862
1863 path_len = UniStrnlen((wchar_t *)path, PATH_MAX);
1864
1865 /*
1866 * make room for one path separator between the treename and
1867 * path
1868 */
1869 *out_len = treename_len + 1 + path_len;
1870
1871 /*
1872 * final path needs to be null-terminated UTF16 with a
1873 * size aligned to 8
1874 */
1875
1876 *out_size = roundup((*out_len+1)*2, 8);
1877 *out_path = kzalloc(*out_size, GFP_KERNEL);
1878 if (!*out_path)
1879 return -ENOMEM;
1880
1881 cp = load_nls_default();
1882 cifs_strtoUTF16(*out_path, treename, treename_len, cp);
1883 UniStrcat(*out_path, sep);
1884 UniStrcat(*out_path, path);
1885 unload_nls(cp);
1886
1887 return 0;
1888}
1889
2503a0db 1890int
064f6047 1891SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
b42bf888 1892 __u8 *oplock, struct smb2_file_all_info *buf,
9d874c36 1893 struct kvec *err_iov, int *buftype)
2503a0db
PS		 1894{
1895 struct smb2_create_req *req;
1896 struct smb2_create_rsp *rsp;
1897 struct TCP_Server_Info *server;
064f6047 1898 struct cifs_tcon *tcon = oparms->tcon;
2503a0db 1899 struct cifs_ses *ses = tcon->ses;
ce558b0e 1900 struct kvec iov[5]; /* make sure at least one for each open context */
bf2afee1 1901 struct kvec rsp_iov = {NULL, 0};
2503a0db
PS		 1902 int resp_buftype;
1903 int uni_path_len;
b8c32dbb
PS		 1904 __le16 *copy_path = NULL;
1905 int copy_size;
2503a0db 1906 int rc = 0;
da502f7d 1907 unsigned int n_iov = 2;
ca81983f 1908 __u32 file_attributes = 0;
ce558b0e 1909 char *dhc_buf = NULL, *lc_buf = NULL, *pc_buf = NULL;
7fb8986e 1910 int flags = 0;
4f33bc35 1911 unsigned int total_len;
2503a0db 1912
f96637be 1913 cifs_dbg(FYI, "create/open\n");
2503a0db
PS		 1914
1915 if (ses && (ses->server))
1916 server = ses->server;
1917 else
1918 return -EIO;
1919
4f33bc35
RS		 1920 rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
1921
2503a0db
PS		 1922 if (rc)
1923 return rc;
1924
5a77e75f 1925 if (smb3_encryption_required(tcon))
7fb8986e
PS		 1926 flags |= CIFS_TRANSFORM_REQ;
1927
064f6047 1928 if (oparms->create_options & CREATE_OPTION_READONLY)
ca81983f 1929 file_attributes |= ATTR_READONLY;
db8b631d
SF		 1930 if (oparms->create_options & CREATE_OPTION_SPECIAL)
1931 file_attributes |= ATTR_SYSTEM;
ca81983f 1932
2503a0db 1933 req->ImpersonationLevel = IL_IMPERSONATION;
064f6047 1934 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
2503a0db
PS		 1935 /* File attributes ignored on open (used in create though) */
1936 req->FileAttributes = cpu_to_le32(file_attributes);
1937 req->ShareAccess = FILE_SHARE_ALL_LE;
064f6047
PS		 1938 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1939 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
2503a0db
PS		 1940
1941 iov[0].iov_base = (char *)req;
59aa3718 1942 /* -1 since last byte is buf[0] which is sent below (path) */
4f33bc35 1943 iov[0].iov_len = total_len - 1;
f0712928 1944
4f33bc35 1945 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
f0712928
AA		 1946
1947 /* [MS-SMB2] 2.2.13 NameOffset:
1948 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
1949 * the SMB2 header, the file name includes a prefix that will
1950 * be processed during DFS name normalization as specified in
1951 * section 3.3.5.9. Otherwise, the file name is relative to
1952 * the share that is identified by the TreeId in the SMB2
1953 * header.
1954 */
1955 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
1956 int name_len;
1957
4f33bc35 1958 req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
f0712928
AA		 1959 rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
1960 &name_len,
1961 tcon->treeName, path);
b7a73c84
RS		 1962 if (rc) {
1963 cifs_small_buf_release(req);
f0712928 1964 return rc;
b7a73c84 1965 }
f0712928 1966 req->NameLength = cpu_to_le16(name_len * 2);
59aa3718
PS		 1967 uni_path_len = copy_size;
1968 path = copy_path;
f0712928
AA		 1969 } else {
1970 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
1971 /* MUST set path len (NameLength) to 0 opening root of share */
1972 req->NameLength = cpu_to_le16(uni_path_len - 2);
1973 if (uni_path_len % 8 != 0) {
1974 copy_size = roundup(uni_path_len, 8);
1975 copy_path = kzalloc(copy_size, GFP_KERNEL);
b7a73c84
RS		 1976 if (!copy_path) {
1977 cifs_small_buf_release(req);
f0712928 1978 return -ENOMEM;
b7a73c84 1979 }
f0712928
AA		 1980 memcpy((char *)copy_path, (const char *)path,
1981 uni_path_len);
1982 uni_path_len = copy_size;
1983 path = copy_path;
1984 }
2503a0db
PS		 1985 }
1986
59aa3718
PS		 1987 iov[1].iov_len = uni_path_len;
1988 iov[1].iov_base = path;
59aa3718 1989
b8c32dbb
PS		 1990 if (!server->oplocks)
1991 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1992
a41a28bd 1993 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
b8c32dbb
PS		 1994 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1995 req->RequestedOplockLevel = *oplock;
1996 else {
da502f7d 1997 rc = add_lease_context(server, iov, &n_iov, oplock);
d22cbfec 1998 if (rc) {
b8c32dbb
PS		 1999 cifs_small_buf_release(req);
2000 kfree(copy_path);
d22cbfec 2001 return rc;
b8c32dbb 2002 }
da502f7d 2003 lc_buf = iov[n_iov-1].iov_base;
b8c32dbb
PS		 2004 }
2005
63eb3def
PS		 2006 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
2007 /* need to set Next field of lease context if we request it */
a41a28bd 2008 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
63eb3def 2009 struct create_context *ccontext =
da502f7d 2010 (struct create_context *)iov[n_iov-1].iov_base;
1c46943f 2011 ccontext->Next =
a41a28bd 2012 cpu_to_le32(server->vals->create_lease_size);
63eb3def 2013 }
b56eae4d 2014
da502f7d 2015 rc = add_durable_context(iov, &n_iov, oparms,
b56eae4d 2016 tcon->use_persistent);
63eb3def
PS		 2017 if (rc) {
2018 cifs_small_buf_release(req);
2019 kfree(copy_path);
663a9621 2020 kfree(lc_buf);
63eb3def
PS		 2021 return rc;
2022 }
da502f7d 2023 dhc_buf = iov[n_iov-1].iov_base;
63eb3def
PS		 2024 }
2025
ce558b0e
SF		 2026#ifdef CONFIG_CIFS_SMB311
2027 if (tcon->posix_extensions) {
2028 if (n_iov > 2) {
2029 struct create_context *ccontext =
2030 (struct create_context *)iov[n_iov-1].iov_base;
2031 ccontext->Next =
2032 cpu_to_le32(iov[n_iov-1].iov_len);
2033 }
2034
2035 rc = add_posix_context(iov, &n_iov, oparms->mode);
2036 if (rc) {
2037 cifs_small_buf_release(req);
2038 kfree(copy_path);
2039 kfree(lc_buf);
2040 kfree(dhc_buf);
2041 return rc;
2042 }
2043 pc_buf = iov[n_iov-1].iov_base;
2044 }
2045#endif /* SMB311 */
2046
4f33bc35
RS		 2047 rc = smb2_send_recv(xid, ses, iov, n_iov, &resp_buftype, flags,
2048 &rsp_iov);
da502f7d
PS		 2049 cifs_small_buf_release(req);
2050 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2503a0db
PS		 2051
2052 if (rc != 0) {
2053 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
91cb74f5
RS		 2054 if (err_iov && rsp) {
2055 *err_iov = rsp_iov;
9d874c36 2056 *buftype = resp_buftype;
91cb74f5
RS		 2057 resp_buftype = CIFS_NO_BUFFER;
2058 rsp = NULL;
2059 }
28d59363
SF		 2060 trace_smb3_open_err(xid, tcon->tid, ses->Suid,
2061 oparms->create_options, oparms->desired_access, rc);
2503a0db 2062 goto creat_exit;
28d59363
SF		 2063 } else
2064 trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid,
2065 ses->Suid, oparms->create_options,
2066 oparms->desired_access);
2503a0db 2067
064f6047
PS		 2068 oparms->fid->persistent_fid = rsp->PersistentFileId;
2069 oparms->fid->volatile_fid = rsp->VolatileFileId;
f0df737e
PS		 2070
2071 if (buf) {
2072 memcpy(buf, &rsp->CreationTime, 32);
2073 buf->AllocationSize = rsp->AllocationSize;
2074 buf->EndOfFile = rsp->EndofFile;
2075 buf->Attributes = rsp->FileAttributes;
2076 buf->NumberOfLinks = cpu_to_le32(1);
2077 buf->DeletePending = 0;
2078 }
2e44b288 2079
b8c32dbb 2080 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
96164ab2
RS		 2081 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch,
2082 oparms->fid->lease_key);
b8c32dbb
PS		 2083 else
2084 *oplock = rsp->OplockLevel;
2503a0db 2085creat_exit:
b8c32dbb 2086 kfree(copy_path);
663a9621
PS		 2087 kfree(lc_buf);
2088 kfree(dhc_buf);
ce558b0e 2089 kfree(pc_buf);
2503a0db
PS		 2090 free_rsp_buf(resp_buftype, rsp);
2091 return rc;
2092}
2093
4a72dafa
SF		 2094/*
2095 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
2096 */
2097int
2098SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
63a83b86 2099 u64 volatile_fid, u32 opcode, bool is_fsctl,
51146625
AA		 2100 char *in_data, u32 indatalen,
2101 char **out_data, u32 *plen /* returned data len */)
4a72dafa
SF		 2102{
2103 struct smb2_ioctl_req *req;
2104 struct smb2_ioctl_rsp *rsp;
8e353106 2105 struct cifs_ses *ses;
4a72dafa 2106 struct kvec iov[2];
da502f7d 2107 struct kvec rsp_iov;
4a72dafa 2108 int resp_buftype;
da502f7d 2109 int n_iov;
4a72dafa 2110 int rc = 0;
7fb8986e 2111 int flags = 0;
97754680 2112 unsigned int total_len;
4a72dafa
SF		 2113
2114 cifs_dbg(FYI, "SMB2 IOCTL\n");
2115
3d1a3745
SF		 2116 if (out_data != NULL)
2117 *out_data = NULL;
2118
4a72dafa
SF		 2119 /* zero out returned data len, in case of error */
2120 if (plen)
2121 *plen = 0;
2122
8e353106
SF		 2123 if (tcon)
2124 ses = tcon->ses;
2125 else
2126 return -EIO;
2127
68a6afa7 2128 if (!ses || !(ses->server))
4a72dafa
SF		 2129 return -EIO;
2130
97754680 2131 rc = smb2_plain_req_init(SMB2_IOCTL, tcon, (void **) &req, &total_len);
4a72dafa
SF		 2132 if (rc)
2133 return rc;
2134
5a77e75f 2135 if (smb3_encryption_required(tcon))
7fb8986e
PS		 2136 flags |= CIFS_TRANSFORM_REQ;
2137
4a72dafa
SF		 2138 req->CtlCode = cpu_to_le32(opcode);
2139 req->PersistentFileId = persistent_fid;
2140 req->VolatileFileId = volatile_fid;
2141
2142 if (indatalen) {
2143 req->InputCount = cpu_to_le32(indatalen);
2144 /* do not set InputOffset if no input data */
2145 req->InputOffset =
97754680 2146 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer));
4a72dafa
SF		 2147 iov[1].iov_base = in_data;
2148 iov[1].iov_len = indatalen;
da502f7d 2149 n_iov = 2;
4a72dafa 2150 } else
da502f7d 2151 n_iov = 1;
4a72dafa
SF		 2152
2153 req->OutputOffset = 0;
2154 req->OutputCount = 0; /* MBZ */
2155
2156 /*
2157 * Could increase MaxOutputResponse, but that would require more
2158 * than one credit. Windows typically sets this smaller, but for some
2159 * ioctls it may be useful to allow server to send more. No point
2160 * limiting what the server can send as long as fits in one credit
7db0a6ef
SF		 2161 * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE
2162 * (by default, note that it can be overridden to make max larger)
2163 * in responses (except for read responses which can be bigger.
2164 * We may want to bump this limit up
4a72dafa 2165 */
7db0a6ef 2166 req->MaxOutputResponse = cpu_to_le32(CIFSMaxBufSize);
4a72dafa
SF		 2167
2168 if (is_fsctl)
2169 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
2170 else
2171 req->Flags = 0;
2172
2173 iov[0].iov_base = (char *)req;
4a72dafa 2174
7ff8d45c
SF		 2175 /*
2176 * If no input data, the size of ioctl struct in
2177 * protocol spec still includes a 1 byte data buffer,
2178 * but if input data passed to ioctl, we do not
2179 * want to double count this, so we do not send
2180 * the dummy one byte of data in iovec[0] if sending
97754680 2181 * input data (in iovec[1]).
7ff8d45c
SF		 2182 */
2183
2184 if (indatalen) {
97754680 2185 iov[0].iov_len = total_len - 1;
7ff8d45c 2186 } else
97754680 2187 iov[0].iov_len = total_len;
7ff8d45c 2188
4587eee0
SF		 2189 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
2190 if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO)
97754680 2191 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
4a72dafa 2192
97754680
RS		 2193 rc = smb2_send_recv(xid, ses, iov, n_iov, &resp_buftype, flags,
2194 &rsp_iov);
da502f7d
PS		 2195 cifs_small_buf_release(req);
2196 rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
4a72dafa 2197
eccb4422
SF		 2198 if (rc != 0)
2199 trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid,
2200 ses->Suid, 0, opcode, rc);
2201
9bf0c9cd 2202 if ((rc != 0) && (rc != -EINVAL)) {
8e353106 2203 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
4a72dafa 2204 goto ioctl_exit;
9bf0c9cd
SF		 2205 } else if (rc == -EINVAL) {
2206 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
2207 (opcode != FSCTL_SRV_COPYCHUNK)) {
8e353106 2208 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
9bf0c9cd
SF		 2209 goto ioctl_exit;
2210 }
4a72dafa
SF		 2211 }
2212
2213 /* check if caller wants to look at return data or just return rc */
2214 if ((plen == NULL) || (out_data == NULL))
2215 goto ioctl_exit;
2216
2217 *plen = le32_to_cpu(rsp->OutputCount);
2218
2219 /* We check for obvious errors in the output buffer length and offset */
2220 if (*plen == 0)
2221 goto ioctl_exit; /* server returned no data */
2222 else if (*plen > 0xFF00) {
2223 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
2224 *plen = 0;
2225 rc = -EIO;
2226 goto ioctl_exit;
2227 }
2228
977b6170 2229 if (rsp_iov.iov_len < le32_to_cpu(rsp->OutputOffset) + *plen) {
4a72dafa
SF		 2230 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
2231 le32_to_cpu(rsp->OutputOffset));
2232 *plen = 0;
2233 rc = -EIO;
2234 goto ioctl_exit;
2235 }
2236
2237 *out_data = kmalloc(*plen, GFP_KERNEL);
2238 if (*out_data == NULL) {
2239 rc = -ENOMEM;
2240 goto ioctl_exit;
2241 }
2242
977b6170 2243 memcpy(*out_data, (char *)rsp + le32_to_cpu(rsp->OutputOffset), *plen);
4a72dafa
SF		 2244ioctl_exit:
2245 free_rsp_buf(resp_buftype, rsp);
2246 return rc;
2247}
2248
64a5cfa6
SF		 2249/*
2250 * Individual callers to ioctl worker function follow
2251 */
2252
2253int
2254SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2255 u64 persistent_fid, u64 volatile_fid)
2256{
2257 int rc;
64a5cfa6
SF		 2258 struct compress_ioctl fsctl_input;
2259 char *ret_data = NULL;
2260
2261 fsctl_input.CompressionState =
bc09d141 2262 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
64a5cfa6
SF		 2263
2264 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
2265 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
2266 (char *)&fsctl_input /* data input */,
2267 2 /* in data len */, &ret_data /* out data */, NULL);
2268
2269 cifs_dbg(FYI, "set compression rc %d\n", rc);
64a5cfa6
SF		 2270
2271 return rc;
2272}
2273
2503a0db 2274int
97ca1762
RS		 2275SMB2_close_flags(const unsigned int xid, struct cifs_tcon *tcon,
2276 u64 persistent_fid, u64 volatile_fid, int flags)
2503a0db
PS		 2277{
2278 struct smb2_close_req *req;
2279 struct smb2_close_rsp *rsp;
2503a0db
PS		 2280 struct cifs_ses *ses = tcon->ses;
2281 struct kvec iov[1];
da502f7d 2282 struct kvec rsp_iov;
2503a0db
PS		 2283 int resp_buftype;
2284 int rc = 0;
afcccefd 2285 unsigned int total_len;
2503a0db 2286
f96637be 2287 cifs_dbg(FYI, "Close\n");
2503a0db 2288
68a6afa7 2289 if (!ses || !(ses->server))
2503a0db
PS		 2290 return -EIO;
2291
afcccefd 2292 rc = smb2_plain_req_init(SMB2_CLOSE, tcon, (void **) &req, &total_len);
2503a0db
PS		 2293 if (rc)
2294 return rc;
2295
5a77e75f 2296 if (smb3_encryption_required(tcon))
7fb8986e
PS		 2297 flags |= CIFS_TRANSFORM_REQ;
2298
2503a0db
PS		 2299 req->PersistentFileId = persistent_fid;
2300 req->VolatileFileId = volatile_fid;
2301
2302 iov[0].iov_base = (char *)req;
afcccefd 2303 iov[0].iov_len = total_len;
2503a0db 2304
afcccefd 2305 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2306 cifs_small_buf_release(req);
2307 rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
2503a0db
PS		 2308
2309 if (rc != 0) {
d4a029d2 2310 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
eccb4422
SF		 2311 trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid,
2312 rc);
2503a0db
PS		 2313 goto close_exit;
2314 }
2315
2503a0db
PS		 2316 /* BB FIXME - decode close response, update inode for caching */
2317
2318close_exit:
2319 free_rsp_buf(resp_buftype, rsp);
2320 return rc;
2321}
be4cb9e3 2322
97ca1762
RS		 2323int
2324SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
2325 u64 persistent_fid, u64 volatile_fid)
2326{
2327 return SMB2_close_flags(xid, tcon, persistent_fid, volatile_fid, 0);
2328}
2329
be4cb9e3 2330static int
1fc6ad2f 2331validate_iov(unsigned int offset, unsigned int buffer_length,
c1596ff5 2332 struct kvec *iov, unsigned int min_buf_size)
be4cb9e3 2333{
c1596ff5 2334 unsigned int smb_len = iov->iov_len;
1fc6ad2f
RS		 2335 char *end_of_smb = smb_len + (char *)iov->iov_base;
2336 char *begin_of_buf = 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
1fc6ad2f 2366validate_and_copy_iov(unsigned int offset, unsigned int buffer_length,
c1596ff5 2367 struct kvec *iov, unsigned int minbufsize,
be4cb9e3 2368 char *data)
be4cb9e3 2369{
1fc6ad2f 2370 char *begin_of_buf = offset + (char *)iov->iov_base;
be4cb9e3
PS		 2371 int rc;
2372
2373 if (!data)
2374 return -EINVAL;
2375
1fc6ad2f 2376 rc = validate_iov(offset, buffer_length, iov, minbufsize);
be4cb9e3
PS		 2377 if (rc)
2378 return rc;
2379
2380 memcpy(data, begin_of_buf, buffer_length);
2381
2382 return 0;
2383}
2384
f0df737e
PS		 2385static int
2386query_info(const unsigned int xid, struct cifs_tcon *tcon,
42c493c1
SP		 2387 u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
2388 u32 additional_info, size_t output_len, size_t min_len, void **data,
2389 u32 *dlen)
be4cb9e3
PS		 2390{
2391 struct smb2_query_info_req *req;
2392 struct smb2_query_info_rsp *rsp = NULL;
2393 struct kvec iov[2];
da502f7d 2394 struct kvec rsp_iov;
be4cb9e3
PS		 2395 int rc = 0;
2396 int resp_buftype;
be4cb9e3 2397 struct cifs_ses *ses = tcon->ses;
7fb8986e 2398 int flags = 0;
b2fb7fec 2399 unsigned int total_len;
be4cb9e3 2400
f96637be 2401 cifs_dbg(FYI, "Query Info\n");
be4cb9e3 2402
68a6afa7 2403 if (!ses || !(ses->server))
be4cb9e3
PS		 2404 return -EIO;
2405
b2fb7fec
RS		 2406 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
2407 &total_len);
be4cb9e3
PS		 2408 if (rc)
2409 return rc;
2410
5a77e75f 2411 if (smb3_encryption_required(tcon))
7fb8986e
PS		 2412 flags |= CIFS_TRANSFORM_REQ;
2413
42c493c1 2414 req->InfoType = info_type;
f0df737e 2415 req->FileInfoClass = info_class;
be4cb9e3
PS		 2416 req->PersistentFileId = persistent_fid;
2417 req->VolatileFileId = volatile_fid;
42c493c1 2418 req->AdditionalInformation = cpu_to_le32(additional_info);
48923d2a
AA		 2419
2420 /*
2421 * We do not use the input buffer (do not send extra byte)
2422 */
2423 req->InputBufferOffset = 0;
48923d2a 2424
f0df737e 2425 req->OutputBufferLength = cpu_to_le32(output_len);
be4cb9e3
PS		 2426
2427 iov[0].iov_base = (char *)req;
b2fb7fec
RS		 2428 /* 1 for Buffer */
2429 iov[0].iov_len = total_len - 1;
be4cb9e3 2430
b2fb7fec 2431 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2432 cifs_small_buf_release(req);
2433 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
e5d04887 2434
be4cb9e3
PS		 2435 if (rc) {
2436 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
eccb4422
SF		 2437 trace_smb3_query_info_err(xid, persistent_fid, tcon->tid,
2438 ses->Suid, info_class, (__u32)info_type, rc);
be4cb9e3
PS		 2439 goto qinf_exit;
2440 }
2441
42c493c1
SP		 2442 if (dlen) {
2443 *dlen = le32_to_cpu(rsp->OutputBufferLength);
2444 if (!*data) {
2445 *data = kmalloc(*dlen, GFP_KERNEL);
2446 if (!*data) {
2447 cifs_dbg(VFS,
2448 "Error %d allocating memory for acl\n",
2449 rc);
2450 *dlen = 0;
2451 goto qinf_exit;
2452 }
2453 }
2454 }
2455
1fc6ad2f 2456 rc = validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset),
be4cb9e3 2457 le32_to_cpu(rsp->OutputBufferLength),
c1596ff5 2458 &rsp_iov, min_len, *data);
be4cb9e3
PS		 2459
2460qinf_exit:
2461 free_rsp_buf(resp_buftype, rsp);
2462 return rc;
2463}
9094fad1 2464
95907fea 2465int SMB2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
7cb3def4
RS		 2466 u64 persistent_fid, u64 volatile_fid,
2467 int ea_buf_size, struct smb2_file_full_ea_info *data)
95907fea
RS		 2468{
2469 return query_info(xid, tcon, persistent_fid, volatile_fid,
2470 FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, 0,
7cb3def4 2471 ea_buf_size,
95907fea
RS		 2472 sizeof(struct smb2_file_full_ea_info),
2473 (void **)&data,
2474 NULL);
2475}
2476
42c493c1
SP		 2477int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
2478 u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data)
2479{
2480 return query_info(xid, tcon, persistent_fid, volatile_fid,
2481 FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0,
2482 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
2483 sizeof(struct smb2_file_all_info), (void **)&data,
2484 NULL);
2485}
2486
f0df737e 2487int
42c493c1 2488SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
f0df737e 2489 u64 persistent_fid, u64 volatile_fid,
42c493c1 2490 void **data, u32 *plen)
f0df737e 2491{
42c493c1
SP		 2492 __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO;
2493 *plen = 0;
2494
f0df737e 2495 return query_info(xid, tcon, persistent_fid, volatile_fid,
42c493c1 2496 0, SMB2_O_INFO_SECURITY, additional_info,
ee25c6dd 2497 SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen);
f0df737e
PS		 2498}
2499
2500int
2501SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
2502 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
2503{
2504 return query_info(xid, tcon, persistent_fid, volatile_fid,
42c493c1
SP		 2505 FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0,
2506 sizeof(struct smb2_file_internal_info),
f0df737e 2507 sizeof(struct smb2_file_internal_info),
42c493c1 2508 (void **)&uniqueid, NULL);
f0df737e
PS		 2509}
2510
9094fad1
PS		 2511/*
2512 * This is a no-op for now. We're not really interested in the reply, but
2513 * rather in the fact that the server sent one and that server->lstrp
2514 * gets updated.
2515 *
2516 * FIXME: maybe we should consider checking that the reply matches request?
2517 */
2518static void
2519smb2_echo_callback(struct mid_q_entry *mid)
2520{
2521 struct TCP_Server_Info *server = mid->callback_data;
31473fc4 2522 struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
9094fad1
PS		 2523 unsigned int credits_received = 1;
2524
2525 if (mid->mid_state == MID_RESPONSE_RECEIVED)
49f466bd 2526 credits_received = le16_to_cpu(rsp->sync_hdr.CreditRequest);
9094fad1
PS		 2527
2528 DeleteMidQEntry(mid);
2529 add_credits(server, credits_received, CIFS_ECHO_OP);
2530}
2531
53e0e11e
PS		 2532void smb2_reconnect_server(struct work_struct *work)
2533{
2534 struct TCP_Server_Info *server = container_of(work,
2535 struct TCP_Server_Info, reconnect.work);
2536 struct cifs_ses *ses;
2537 struct cifs_tcon *tcon, *tcon2;
2538 struct list_head tmp_list;
2539 int tcon_exist = false;
18ea4311
GP		 2540 int rc;
2541 int resched = false;
2542
53e0e11e
PS		 2543
2544 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2545 mutex_lock(&server->reconnect_mutex);
2546
2547 INIT_LIST_HEAD(&tmp_list);
2548 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
2549
2550 spin_lock(&cifs_tcp_ses_lock);
2551 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2552 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
96a988ff 2553 if (tcon->need_reconnect || tcon->need_reopen_files) {
53e0e11e
PS		 2554 tcon->tc_count++;
2555 list_add_tail(&tcon->rlist, &tmp_list);
2556 tcon_exist = true;
2557 }
2558 }
b327a717
AA		 2559 if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) {
2560 list_add_tail(&ses->tcon_ipc->rlist, &tmp_list);
2561 tcon_exist = true;
2562 }
53e0e11e
PS		 2563 }
2564 /*
2565 * Get the reference to server struct to be sure that the last call of
2566 * cifs_put_tcon() in the loop below won't release the server pointer.
2567 */
2568 if (tcon_exist)
2569 server->srv_count++;
2570
2571 spin_unlock(&cifs_tcp_ses_lock);
2572
2573 list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
18ea4311
GP		 2574 rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon);
2575 if (!rc)
96a988ff 2576 cifs_reopen_persistent_handles(tcon);
18ea4311
GP		 2577 else
2578 resched = true;
53e0e11e
PS		 2579 list_del_init(&tcon->rlist);
2580 cifs_put_tcon(tcon);
2581 }
2582
2583 cifs_dbg(FYI, "Reconnecting tcons finished\n");
18ea4311
GP		 2584 if (resched)
2585 queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
53e0e11e
PS		 2586 mutex_unlock(&server->reconnect_mutex);
2587
2588 /* now we can safely release srv struct */
2589 if (tcon_exist)
2590 cifs_put_tcp_session(server, 1);
2591}
2592
9094fad1
PS		 2593int
2594SMB2_echo(struct TCP_Server_Info *server)
2595{
2596 struct smb2_echo_req *req;
2597 int rc = 0;
738f9de5
PS		 2598 struct kvec iov[2];
2599 struct smb_rqst rqst = { .rq_iov = iov,
2600 .rq_nvec = 2 };
7f7ae759
RS		 2601 unsigned int total_len;
2602 __be32 rfc1002_marker;
9094fad1 2603
f96637be 2604 cifs_dbg(FYI, "In echo request\n");
9094fad1 2605
4fcd1813 2606 if (server->tcpStatus == CifsNeedNegotiate) {
53e0e11e
PS		 2607 /* No need to send echo on newly established connections */
2608 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
2609 return rc;
4fcd1813
SF		 2610 }
2611
7f7ae759 2612 rc = smb2_plain_req_init(SMB2_ECHO, NULL, (void **)&req, &total_len);
9094fad1
PS		 2613 if (rc)
2614 return rc;
2615
7f7ae759 2616 req->sync_hdr.CreditRequest = cpu_to_le16(1);
9094fad1 2617
738f9de5 2618 iov[0].iov_len = 4;
7f7ae759
RS		 2619 rfc1002_marker = cpu_to_be32(total_len);
2620 iov[0].iov_base = &rfc1002_marker;
2621 iov[1].iov_len = total_len;
2622 iov[1].iov_base = (char *)req;
9094fad1 2623
9b7c18a2
PS		 2624 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
2625 server, CIFS_ECHO_OP);
9094fad1 2626 if (rc)
f96637be 2627 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
9094fad1
PS		 2628
2629 cifs_small_buf_release(req);
2630 return rc;
2631}
7a5cfb19
PS		 2632
2633int
2634SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2635 u64 volatile_fid)
2636{
2637 struct smb2_flush_req *req;
7a5cfb19
PS		 2638 struct cifs_ses *ses = tcon->ses;
2639 struct kvec iov[1];
da502f7d 2640 struct kvec rsp_iov;
7a5cfb19
PS		 2641 int resp_buftype;
2642 int rc = 0;
7fb8986e 2643 int flags = 0;
1f444e4c 2644 unsigned int total_len;
7a5cfb19 2645
f96637be 2646 cifs_dbg(FYI, "Flush\n");
7a5cfb19 2647
68a6afa7 2648 if (!ses || !(ses->server))
7a5cfb19
PS		 2649 return -EIO;
2650
1f444e4c 2651 rc = smb2_plain_req_init(SMB2_FLUSH, tcon, (void **) &req, &total_len);
7a5cfb19
PS		 2652 if (rc)
2653 return rc;
2654
5a77e75f 2655 if (smb3_encryption_required(tcon))
7fb8986e
PS		 2656 flags |= CIFS_TRANSFORM_REQ;
2657
7a5cfb19
PS		 2658 req->PersistentFileId = persistent_fid;
2659 req->VolatileFileId = volatile_fid;
2660
2661 iov[0].iov_base = (char *)req;
1f444e4c 2662 iov[0].iov_len = total_len;
7a5cfb19 2663
1f444e4c 2664 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d 2665 cifs_small_buf_release(req);
7a5cfb19 2666
eccb4422 2667 if (rc != 0) {
7a5cfb19 2668 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
eccb4422
SF		 2669 trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid,
2670 rc);
2671 }
7a5cfb19 2672
da502f7d 2673 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
7a5cfb19
PS		 2674 return rc;
2675}
09a4707e
PS		 2676
2677/*
2678 * To form a chain of read requests, any read requests after the first should
2679 * have the end_of_chain boolean set to true.
2680 */
2681static int
738f9de5 2682smb2_new_read_req(void **buf, unsigned int *total_len,
2dabfd5b
LL		 2683 struct cifs_io_parms *io_parms, struct cifs_readdata *rdata,
2684 unsigned int remaining_bytes, int request_type)
09a4707e
PS		 2685{
2686 int rc = -EACCES;
b8f57ee8 2687 struct smb2_read_plain_req *req = NULL;
31473fc4 2688 struct smb2_sync_hdr *shdr;
2dabfd5b 2689 struct TCP_Server_Info *server;
09a4707e 2690
b8f57ee8
PS		 2691 rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
2692 total_len);
09a4707e
PS		 2693 if (rc)
2694 return rc;
2dabfd5b
LL		 2695
2696 server = io_parms->tcon->ses->server;
2697 if (server == NULL)
09a4707e
PS		 2698 return -ECONNABORTED;
2699
b8f57ee8 2700 shdr = &req->sync_hdr;
31473fc4 2701 shdr->ProcessId = cpu_to_le32(io_parms->pid);
09a4707e
PS		 2702
2703 req->PersistentFileId = io_parms->persistent_fid;
2704 req->VolatileFileId = io_parms->volatile_fid;
2705 req->ReadChannelInfoOffset = 0; /* reserved */
2706 req->ReadChannelInfoLength = 0; /* reserved */
2707 req->Channel = 0; /* reserved */
2708 req->MinimumCount = 0;
2709 req->Length = cpu_to_le32(io_parms->length);
2710 req->Offset = cpu_to_le64(io_parms->offset);
bd3dcc6a
LL		 2711#ifdef CONFIG_CIFS_SMB_DIRECT
2712 /*
2713 * If we want to do a RDMA write, fill in and append
2714 * smbd_buffer_descriptor_v1 to the end of read request
2715 */
bb4c0419 2716 if (server->rdma && rdata && !server->sign &&
bd3dcc6a
LL		 2717 rdata->bytes >= server->smbd_conn->rdma_readwrite_threshold) {
2718
2719 struct smbd_buffer_descriptor_v1 *v1;
2720 bool need_invalidate =
2721 io_parms->tcon->ses->server->dialect == SMB30_PROT_ID;
2722
2723 rdata->mr = smbd_register_mr(
2724 server->smbd_conn, rdata->pages,
7cf20bce
LL		 2725 rdata->nr_pages, rdata->page_offset,
2726 rdata->tailsz, true, need_invalidate);
bd3dcc6a
LL		 2727 if (!rdata->mr)
2728 return -ENOBUFS;
2729
2730 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
2731 if (need_invalidate)
2732 req->Channel = SMB2_CHANNEL_RDMA_V1;
2733 req->ReadChannelInfoOffset =
2026b06e 2734 cpu_to_le16(offsetof(struct smb2_read_plain_req, Buffer));
bd3dcc6a 2735 req->ReadChannelInfoLength =
2026b06e 2736 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
bd3dcc6a 2737 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
2026b06e
SF		 2738 v1->offset = cpu_to_le64(rdata->mr->mr->iova);
2739 v1->token = cpu_to_le32(rdata->mr->mr->rkey);
2740 v1->length = cpu_to_le32(rdata->mr->mr->length);
bd3dcc6a
LL		 2741
2742 *total_len += sizeof(*v1) - 1;
2743 }
2744#endif
09a4707e
PS		 2745 if (request_type & CHAINED_REQUEST) {
2746 if (!(request_type & END_OF_CHAIN)) {
b8f57ee8
PS		 2747 /* next 8-byte aligned request */
2748 *total_len = DIV_ROUND_UP(*total_len, 8) * 8;
2749 shdr->NextCommand = cpu_to_le32(*total_len);
09a4707e 2750 } else /* END_OF_CHAIN */
31473fc4 2751 shdr->NextCommand = 0;
09a4707e 2752 if (request_type & RELATED_REQUEST) {
31473fc4 2753 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
09a4707e
PS		 2754 /*
2755 * Related requests use info from previous read request
2756 * in chain.
2757 */
31473fc4
PS		 2758 shdr->SessionId = 0xFFFFFFFF;
2759 shdr->TreeId = 0xFFFFFFFF;
09a4707e
PS		 2760 req->PersistentFileId = 0xFFFFFFFF;
2761 req->VolatileFileId = 0xFFFFFFFF;
2762 }
2763 }
2764 if (remaining_bytes > io_parms->length)
2765 req->RemainingBytes = cpu_to_le32(remaining_bytes);
2766 else
2767 req->RemainingBytes = 0;
2768
738f9de5 2769 *buf = req;
09a4707e
PS		 2770 return rc;
2771}
2772
2773static void
2774smb2_readv_callback(struct mid_q_entry *mid)
2775{
2776 struct cifs_readdata *rdata = mid->callback_data;
2777 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
2778 struct TCP_Server_Info *server = tcon->ses->server;
738f9de5 2779 struct smb2_sync_hdr *shdr =
977b6170 2780 (struct smb2_sync_hdr *)rdata->iov[0].iov_base;
09a4707e 2781 unsigned int credits_received = 1;
738f9de5
PS		 2782 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2783 .rq_nvec = 2,
8321fec4 2784 .rq_pages = rdata->pages,
1dbe3466 2785 .rq_offset = rdata->page_offset,
8321fec4
JL		 2786 .rq_npages = rdata->nr_pages,
2787 .rq_pagesz = rdata->pagesz,
2788 .rq_tailsz = rdata->tailsz };
09a4707e 2789
f96637be
JP		 2790 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2791 __func__, mid->mid, mid->mid_state, rdata->result,
2792 rdata->bytes);
09a4707e
PS		 2793
2794 switch (mid->mid_state) {
2795 case MID_RESPONSE_RECEIVED:
31473fc4 2796 credits_received = le16_to_cpu(shdr->CreditRequest);
09a4707e 2797 /* result already set, check signature */
4326ed2f 2798 if (server->sign && !mid->decrypted) {
3c1bf7e4
PS		 2799 int rc;
2800
0b688cfc 2801 rc = smb2_verify_signature(&rqst, server);
3c1bf7e4 2802 if (rc)
f96637be
JP		 2803 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
2804 rc);
3c1bf7e4 2805 }
09a4707e 2806 /* FIXME: should this be counted toward the initiating task? */
34a54d61
PS		 2807 task_io_account_read(rdata->got_bytes);
2808 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 2809 break;
2810 case MID_REQUEST_SUBMITTED:
2811 case MID_RETRY_NEEDED:
2812 rdata->result = -EAGAIN;
d913ed17
PS		 2813 if (server->sign && rdata->got_bytes)
2814 /* reset bytes number since we can not check a sign */
2815 rdata->got_bytes = 0;
2816 /* FIXME: should this be counted toward the initiating task? */
2817 task_io_account_read(rdata->got_bytes);
2818 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 2819 break;
2820 default:
2821 if (rdata->result != -ENODATA)
2822 rdata->result = -EIO;
2823 }
bd3dcc6a
LL		 2824#ifdef CONFIG_CIFS_SMB_DIRECT
2825 /*
2826 * If this rdata has a memmory registered, the MR can be freed
2827 * MR needs to be freed as soon as I/O finishes to prevent deadlock
2828 * because they have limited number and are used for future I/Os
2829 */
2830 if (rdata->mr) {
2831 smbd_deregister_mr(rdata->mr);
2832 rdata->mr = NULL;
2833 }
2834#endif
09a4707e
PS		 2835 if (rdata->result)
2836 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
2837
2838 queue_work(cifsiod_wq, &rdata->work);
2839 DeleteMidQEntry(mid);
2840 add_credits(server, credits_received, 0);
2841}
2842
738f9de5 2843/* smb2_async_readv - send an async read, and set up mid to handle result */
09a4707e
PS		 2844int
2845smb2_async_readv(struct cifs_readdata *rdata)
2846{
bed9da02 2847 int rc, flags = 0;
31473fc4
PS		 2848 char *buf;
2849 struct smb2_sync_hdr *shdr;
09a4707e 2850 struct cifs_io_parms io_parms;
738f9de5
PS		 2851 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2852 .rq_nvec = 2 };
bed9da02 2853 struct TCP_Server_Info *server;
738f9de5 2854 unsigned int total_len;
b8f57ee8 2855 __be32 req_len;
09a4707e 2856
f96637be
JP		 2857 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
2858 __func__, rdata->offset, rdata->bytes);
09a4707e
PS		 2859
2860 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
2861 io_parms.offset = rdata->offset;
2862 io_parms.length = rdata->bytes;
2863 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
2864 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
2865 io_parms.pid = rdata->pid;
bed9da02
PS		 2866
2867 server = io_parms.tcon->ses->server;
2868
2dabfd5b
LL		 2869 rc = smb2_new_read_req(
2870 (void **) &buf, &total_len, &io_parms, rdata, 0, 0);
bed9da02
PS		 2871 if (rc) {
2872 if (rc == -EAGAIN && rdata->credits) {
2873 /* credits was reset by reconnect */
2874 rdata->credits = 0;
2875 /* reduce in_flight value since we won't send the req */
2876 spin_lock(&server->req_lock);
2877 server->in_flight--;
2878 spin_unlock(&server->req_lock);
2879 }
09a4707e 2880 return rc;
bed9da02 2881 }
09a4707e 2882
5a77e75f 2883 if (smb3_encryption_required(io_parms.tcon))
7fb8986e
PS		 2884 flags |= CIFS_TRANSFORM_REQ;
2885
b8f57ee8
PS		 2886 req_len = cpu_to_be32(total_len);
2887
2888 rdata->iov[0].iov_base = &req_len;
2889 rdata->iov[0].iov_len = sizeof(__be32);
2890 rdata->iov[1].iov_base = buf;
2891 rdata->iov[1].iov_len = total_len;
2892
2893 shdr = (struct smb2_sync_hdr *)buf;
09a4707e 2894
bed9da02 2895 if (rdata->credits) {
31473fc4 2896 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
bed9da02 2897 SMB2_MAX_BUFFER_SIZE));
31473fc4 2898 shdr->CreditRequest = shdr->CreditCharge;
bed9da02
PS		 2899 spin_lock(&server->req_lock);
2900 server->credits += rdata->credits -
31473fc4 2901 le16_to_cpu(shdr->CreditCharge);
bed9da02
PS		 2902 spin_unlock(&server->req_lock);
2903 wake_up(&server->request_q);
7fb8986e 2904 flags |= CIFS_HAS_CREDITS;
bed9da02
PS		 2905 }
2906
09a4707e 2907 kref_get(&rdata->refcount);
fec344e3 2908 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
09a4707e 2909 cifs_readv_receive, smb2_readv_callback,
4326ed2f 2910 smb3_handle_read_data, rdata, flags);
e5d04887 2911 if (rc) {
09a4707e 2912 kref_put(&rdata->refcount, cifs_readdata_release);
e5d04887 2913 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
eccb4422
SF		 2914 trace_smb3_read_err(rc, 0 /* xid */, io_parms.persistent_fid,
2915 io_parms.tcon->tid, io_parms.tcon->ses->Suid,
2916 io_parms.offset, io_parms.length);
2917 } else
2918 trace_smb3_read_done(0 /* xid */, io_parms.persistent_fid,
2919 io_parms.tcon->tid, io_parms.tcon->ses->Suid,
2920 io_parms.offset, io_parms.length);
09a4707e
PS		 2921
2922 cifs_small_buf_release(buf);
2923 return rc;
2924}
33319141 2925
d8e05039
PS		 2926int
2927SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
2928 unsigned int *nbytes, char **buf, int *buf_type)
2929{
2930 int resp_buftype, rc = -EACCES;
b8f57ee8 2931 struct smb2_read_plain_req *req = NULL;
d8e05039 2932 struct smb2_read_rsp *rsp = NULL;
f5688a6d 2933 struct kvec iov[1];
da502f7d 2934 struct kvec rsp_iov;
738f9de5 2935 unsigned int total_len;
7fb8986e
PS		 2936 int flags = CIFS_LOG_ERROR;
2937 struct cifs_ses *ses = io_parms->tcon->ses;
d8e05039
PS		 2938
2939 *nbytes = 0;
2dabfd5b 2940 rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0);
d8e05039
PS		 2941 if (rc)
2942 return rc;
2943
5a77e75f 2944 if (smb3_encryption_required(io_parms->tcon))
7fb8986e
PS		 2945 flags |= CIFS_TRANSFORM_REQ;
2946
f5688a6d
RS		 2947 iov[0].iov_base = (char *)req;
2948 iov[0].iov_len = total_len;
b8f57ee8 2949
f5688a6d 2950 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
b8f57ee8 2951 cifs_small_buf_release(req);
d8e05039 2952
da502f7d 2953 rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
d8e05039 2954
a821df3f
RS		 2955 if (rc) {
2956 if (rc != -ENODATA) {
2957 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
2958 cifs_dbg(VFS, "Send error in read = %d\n", rc);
2959 }
eccb4422
SF		 2960 trace_smb3_read_err(rc, xid, req->PersistentFileId,
2961 io_parms->tcon->tid, ses->Suid,
2962 io_parms->offset, io_parms->length);
da502f7d 2963 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
a821df3f 2964 return rc == -ENODATA ? 0 : rc;
eccb4422
SF		 2965 } else
2966 trace_smb3_read_done(xid, req->PersistentFileId,
2967 io_parms->tcon->tid, ses->Suid,
2968 io_parms->offset, io_parms->length);
d8e05039 2969
a821df3f
RS		 2970 *nbytes = le32_to_cpu(rsp->DataLength);
2971 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
2972 (*nbytes > io_parms->length)) {
2973 cifs_dbg(FYI, "bad length %d for count %d\n",
2974 *nbytes, io_parms->length);
2975 rc = -EIO;
2976 *nbytes = 0;
d8e05039
PS		 2977 }
2978
2979 if (*buf) {
977b6170 2980 memcpy(*buf, (char *)rsp + rsp->DataOffset, *nbytes);
da502f7d 2981 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
d8e05039 2982 } else if (resp_buftype != CIFS_NO_BUFFER) {
da502f7d 2983 *buf = rsp_iov.iov_base;
d8e05039
PS		 2984 if (resp_buftype == CIFS_SMALL_BUFFER)
2985 *buf_type = CIFS_SMALL_BUFFER;
2986 else if (resp_buftype == CIFS_LARGE_BUFFER)
2987 *buf_type = CIFS_LARGE_BUFFER;
2988 }
2989 return rc;
2990}
2991
33319141
PS		 2992/*
2993 * Check the mid_state and signature on received buffer (if any), and queue the
2994 * workqueue completion task.
2995 */
2996static void
2997smb2_writev_callback(struct mid_q_entry *mid)
2998{
2999 struct cifs_writedata *wdata = mid->callback_data;
3000 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
3001 unsigned int written;
3002 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
3003 unsigned int credits_received = 1;
3004
3005 switch (mid->mid_state) {
3006 case MID_RESPONSE_RECEIVED:
49f466bd 3007 credits_received = le16_to_cpu(rsp->sync_hdr.CreditRequest);
33319141
PS		 3008 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
3009 if (wdata->result != 0)
3010 break;
3011
3012 written = le32_to_cpu(rsp->DataLength);
3013 /*
3014 * Mask off high 16 bits when bytes written as returned
3015 * by the server is greater than bytes requested by the
3016 * client. OS/2 servers are known to set incorrect
3017 * CountHigh values.
3018 */
3019 if (written > wdata->bytes)
3020 written &= 0xFFFF;
3021
3022 if (written < wdata->bytes)
3023 wdata->result = -ENOSPC;
3024 else
3025 wdata->bytes = written;
3026 break;
3027 case MID_REQUEST_SUBMITTED:
3028 case MID_RETRY_NEEDED:
3029 wdata->result = -EAGAIN;
3030 break;
3031 default:
3032 wdata->result = -EIO;
3033 break;
3034 }
db223a59
LL		 3035#ifdef CONFIG_CIFS_SMB_DIRECT
3036 /*
3037 * If this wdata has a memory registered, the MR can be freed
3038 * The number of MRs available is limited, it's important to recover
3039 * used MR as soon as I/O is finished. Hold MR longer in the later
3040 * I/O process can possibly result in I/O deadlock due to lack of MR
3041 * to send request on I/O retry
3042 */
3043 if (wdata->mr) {
3044 smbd_deregister_mr(wdata->mr);
3045 wdata->mr = NULL;
3046 }
3047#endif
33319141
PS		 3048 if (wdata->result)
3049 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
3050
3051 queue_work(cifsiod_wq, &wdata->work);
3052 DeleteMidQEntry(mid);
3053 add_credits(tcon->ses->server, credits_received, 0);
3054}
3055
3056/* smb2_async_writev - send an async write, and set up mid to handle result */
3057int
4a5c80d7
SF		 3058smb2_async_writev(struct cifs_writedata *wdata,
3059 void (*release)(struct kref *kref))
33319141 3060{
cb7e9eab 3061 int rc = -EACCES, flags = 0;
33319141 3062 struct smb2_write_req *req = NULL;
31473fc4 3063 struct smb2_sync_hdr *shdr;
33319141 3064 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
cb7e9eab 3065 struct TCP_Server_Info *server = tcon->ses->server;
738f9de5
PS		 3066 struct kvec iov[2];
3067 struct smb_rqst rqst = { };
f5688a6d
RS		 3068 unsigned int total_len;
3069 __be32 rfc1002_marker;
33319141 3070
f5688a6d 3071 rc = smb2_plain_req_init(SMB2_WRITE, tcon, (void **) &req, &total_len);
cb7e9eab
PS		 3072 if (rc) {
3073 if (rc == -EAGAIN && wdata->credits) {
3074 /* credits was reset by reconnect */
3075 wdata->credits = 0;
3076 /* reduce in_flight value since we won't send the req */
3077 spin_lock(&server->req_lock);
3078 server->in_flight--;
3079 spin_unlock(&server->req_lock);
3080 }
33319141 3081 goto async_writev_out;
cb7e9eab 3082 }
33319141 3083
5a77e75f 3084 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3085 flags |= CIFS_TRANSFORM_REQ;
3086
f5688a6d 3087 shdr = (struct smb2_sync_hdr *)req;
31473fc4 3088 shdr->ProcessId = cpu_to_le32(wdata->cfile->pid);
33319141
PS		 3089
3090 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
3091 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
3092 req->WriteChannelInfoOffset = 0;
3093 req->WriteChannelInfoLength = 0;
3094 req->Channel = 0;
3095 req->Offset = cpu_to_le64(wdata->offset);
33319141 3096 req->DataOffset = cpu_to_le16(
f5688a6d 3097 offsetof(struct smb2_write_req, Buffer));
33319141 3098 req->RemainingBytes = 0;
db223a59
LL		 3099#ifdef CONFIG_CIFS_SMB_DIRECT
3100 /*
3101 * If we want to do a server RDMA read, fill in and append
3102 * smbd_buffer_descriptor_v1 to the end of write request
3103 */
bb4c0419 3104 if (server->rdma && !server->sign && wdata->bytes >=
db223a59
LL		 3105 server->smbd_conn->rdma_readwrite_threshold) {
3106
3107 struct smbd_buffer_descriptor_v1 *v1;
3108 bool need_invalidate = server->dialect == SMB30_PROT_ID;
3109
3110 wdata->mr = smbd_register_mr(
3111 server->smbd_conn, wdata->pages,
7cf20bce
LL		 3112 wdata->nr_pages, wdata->page_offset,
3113 wdata->tailsz, false, need_invalidate);
db223a59
LL		 3114 if (!wdata->mr) {
3115 rc = -ENOBUFS;
3116 goto async_writev_out;
3117 }
3118 req->Length = 0;
3119 req->DataOffset = 0;
7cf20bce
LL		 3120 if (wdata->nr_pages > 1)
3121 req->RemainingBytes =
3122 cpu_to_le32(
3123 (wdata->nr_pages - 1) * wdata->pagesz -
3124 wdata->page_offset + wdata->tailsz
3125 );
3126 else
3127 req->RemainingBytes = cpu_to_le32(wdata->tailsz);
db223a59
LL		 3128 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
3129 if (need_invalidate)
3130 req->Channel = SMB2_CHANNEL_RDMA_V1;
3131 req->WriteChannelInfoOffset =
2026b06e 3132 cpu_to_le16(offsetof(struct smb2_write_req, Buffer));
db223a59 3133 req->WriteChannelInfoLength =
2026b06e 3134 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
db223a59 3135 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
2026b06e
SF		 3136 v1->offset = cpu_to_le64(wdata->mr->mr->iova);
3137 v1->token = cpu_to_le32(wdata->mr->mr->rkey);
3138 v1->length = cpu_to_le32(wdata->mr->mr->length);
db223a59
LL		 3139 }
3140#endif
33319141 3141 /* 4 for rfc1002 length field and 1 for Buffer */
738f9de5 3142 iov[0].iov_len = 4;
f5688a6d
RS		 3143 rfc1002_marker = cpu_to_be32(total_len - 1 + wdata->bytes);
3144 iov[0].iov_base = &rfc1002_marker;
3145 iov[1].iov_len = total_len - 1;
3146 iov[1].iov_base = (char *)req;
33319141 3147
738f9de5
PS		 3148 rqst.rq_iov = iov;
3149 rqst.rq_nvec = 2;
eddb079d 3150 rqst.rq_pages = wdata->pages;
57a929a6 3151 rqst.rq_offset = wdata->page_offset;
eddb079d
JL		 3152 rqst.rq_npages = wdata->nr_pages;
3153 rqst.rq_pagesz = wdata->pagesz;
3154 rqst.rq_tailsz = wdata->tailsz;
db223a59
LL		 3155#ifdef CONFIG_CIFS_SMB_DIRECT
3156 if (wdata->mr) {
3157 iov[1].iov_len += sizeof(struct smbd_buffer_descriptor_v1);
3158 rqst.rq_npages = 0;
3159 }
3160#endif
f96637be
JP		 3161 cifs_dbg(FYI, "async write at %llu %u bytes\n",
3162 wdata->offset, wdata->bytes);
33319141 3163
db223a59
LL		 3164#ifdef CONFIG_CIFS_SMB_DIRECT
3165 /* For RDMA read, I/O size is in RemainingBytes not in Length */
3166 if (!wdata->mr)
3167 req->Length = cpu_to_le32(wdata->bytes);
3168#else
33319141 3169 req->Length = cpu_to_le32(wdata->bytes);
db223a59 3170#endif
33319141 3171
cb7e9eab 3172 if (wdata->credits) {
31473fc4 3173 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
cb7e9eab 3174 SMB2_MAX_BUFFER_SIZE));
31473fc4 3175 shdr->CreditRequest = shdr->CreditCharge;
cb7e9eab
PS		 3176 spin_lock(&server->req_lock);
3177 server->credits += wdata->credits -
31473fc4 3178 le16_to_cpu(shdr->CreditCharge);
cb7e9eab
PS		 3179 spin_unlock(&server->req_lock);
3180 wake_up(&server->request_q);
7fb8986e 3181 flags |= CIFS_HAS_CREDITS;
cb7e9eab
PS		 3182 }
3183
33319141 3184 kref_get(&wdata->refcount);
9b7c18a2
PS		 3185 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
3186 wdata, flags);
33319141 3187
e5d04887 3188 if (rc) {
eccb4422
SF		 3189 trace_smb3_write_err(0 /* no xid */, req->PersistentFileId,
3190 tcon->tid, tcon->ses->Suid, wdata->offset,
3191 wdata->bytes, rc);
4a5c80d7 3192 kref_put(&wdata->refcount, release);
e5d04887 3193 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
eccb4422
SF		 3194 } else
3195 trace_smb3_write_done(0 /* no xid */, req->PersistentFileId,
3196 tcon->tid, tcon->ses->Suid, wdata->offset,
3197 wdata->bytes);
33319141 3198
33319141
PS		 3199async_writev_out:
3200 cifs_small_buf_release(req);
33319141
PS		 3201 return rc;
3202}
009d3443
PS		 3203
3204/*
3205 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
3206 * The length field from io_parms must be at least 1 and indicates a number of
3207 * elements with data to write that begins with position 1 in iov array. All
3208 * data length is specified by count.
3209 */
3210int
3211SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
3212 unsigned int *nbytes, struct kvec *iov, int n_vec)
3213{
3214 int rc = 0;
3215 struct smb2_write_req *req = NULL;
3216 struct smb2_write_rsp *rsp = NULL;
3217 int resp_buftype;
da502f7d 3218 struct kvec rsp_iov;
7fb8986e 3219 int flags = 0;
f5688a6d 3220 unsigned int total_len;
da502f7d 3221
009d3443
PS		 3222 *nbytes = 0;
3223
3224 if (n_vec < 1)
3225 return rc;
3226
f5688a6d
RS		 3227 rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, (void **) &req,
3228 &total_len);
009d3443
PS		 3229 if (rc)
3230 return rc;
3231
3232 if (io_parms->tcon->ses->server == NULL)
3233 return -ECONNABORTED;
3234
5a77e75f 3235 if (smb3_encryption_required(io_parms->tcon))
7fb8986e
PS		 3236 flags |= CIFS_TRANSFORM_REQ;
3237
f5688a6d 3238 req->sync_hdr.ProcessId = cpu_to_le32(io_parms->pid);
009d3443
PS		 3239
3240 req->PersistentFileId = io_parms->persistent_fid;
3241 req->VolatileFileId = io_parms->volatile_fid;
3242 req->WriteChannelInfoOffset = 0;
3243 req->WriteChannelInfoLength = 0;
3244 req->Channel = 0;
3245 req->Length = cpu_to_le32(io_parms->length);
3246 req->Offset = cpu_to_le64(io_parms->offset);
009d3443 3247 req->DataOffset = cpu_to_le16(
f5688a6d 3248 offsetof(struct smb2_write_req, Buffer));
009d3443
PS		 3249 req->RemainingBytes = 0;
3250
3251 iov[0].iov_base = (char *)req;
f5688a6d
RS		 3252 /* 1 for Buffer */
3253 iov[0].iov_len = total_len - 1;
009d3443 3254
f5688a6d
RS		 3255 rc = smb2_send_recv(xid, io_parms->tcon->ses, iov, n_vec + 1,
3256 &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 3257 cifs_small_buf_release(req);
3258 rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
009d3443
PS		 3259
3260 if (rc) {
eccb4422
SF		 3261 trace_smb3_write_err(xid, req->PersistentFileId,
3262 io_parms->tcon->tid,
3263 io_parms->tcon->ses->Suid,
3264 io_parms->offset, io_parms->length, rc);
009d3443 3265 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
f96637be 3266 cifs_dbg(VFS, "Send error in write = %d\n", rc);
eccb4422 3267 } else {
009d3443 3268 *nbytes = le32_to_cpu(rsp->DataLength);
eccb4422
SF		 3269 trace_smb3_write_done(xid, req->PersistentFileId,
3270 io_parms->tcon->tid,
3271 io_parms->tcon->ses->Suid,
3272 io_parms->offset, *nbytes);
3273 }
e5d04887
PS		 3274
3275 free_rsp_buf(resp_buftype, rsp);
009d3443
PS		 3276 return rc;
3277}
35143eb5 3278
d324f08d
PS		 3279static unsigned int
3280num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
3281{
3282 int len;
3283 unsigned int entrycount = 0;
3284 unsigned int next_offset = 0;
3285 FILE_DIRECTORY_INFO *entryptr;
3286
3287 if (bufstart == NULL)
3288 return 0;
3289
3290 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
3291
3292 while (1) {
3293 entryptr = (FILE_DIRECTORY_INFO *)
3294 ((char *)entryptr + next_offset);
3295
3296 if ((char *)entryptr + size > end_of_buf) {
f96637be 3297 cifs_dbg(VFS, "malformed search entry would overflow\n");
d324f08d
PS		 3298 break;
3299 }
3300
3301 len = le32_to_cpu(entryptr->FileNameLength);
3302 if ((char *)entryptr + len + size > end_of_buf) {
f96637be
JP		 3303 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
3304 end_of_buf);
d324f08d
PS		 3305 break;
3306 }
3307
3308 *lastentry = (char *)entryptr;
3309 entrycount++;
3310
3311 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
3312 if (!next_offset)
3313 break;
3314 }
3315
3316 return entrycount;
3317}
3318
3319/*
3320 * Readdir/FindFirst
3321 */
3322int
3323SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
3324 u64 persistent_fid, u64 volatile_fid, int index,
3325 struct cifs_search_info *srch_inf)
3326{
3327 struct smb2_query_directory_req *req;
3328 struct smb2_query_directory_rsp *rsp = NULL;
3329 struct kvec iov[2];
da502f7d 3330 struct kvec rsp_iov;
d324f08d
PS		 3331 int rc = 0;
3332 int len;
75fdfc84 3333 int resp_buftype = CIFS_NO_BUFFER;
d324f08d
PS		 3334 unsigned char *bufptr;
3335 struct TCP_Server_Info *server;
3336 struct cifs_ses *ses = tcon->ses;
3337 __le16 asteriks = cpu_to_le16('*');
3338 char *end_of_smb;
3339 unsigned int output_size = CIFSMaxBufSize;
3340 size_t info_buf_size;
7fb8986e 3341 int flags = 0;
7c00c3a6 3342 unsigned int total_len;
d324f08d
PS		 3343
3344 if (ses && (ses->server))
3345 server = ses->server;
3346 else
3347 return -EIO;
3348
7c00c3a6
RS		 3349 rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req,
3350 &total_len);
d324f08d
PS		 3351 if (rc)
3352 return rc;
3353
5a77e75f 3354 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3355 flags |= CIFS_TRANSFORM_REQ;
3356
d324f08d
PS		 3357 switch (srch_inf->info_level) {
3358 case SMB_FIND_FILE_DIRECTORY_INFO:
3359 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
3360 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
3361 break;
3362 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
3363 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
3364 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
3365 break;
3366 default:
f96637be
JP		 3367 cifs_dbg(VFS, "info level %u isn't supported\n",
3368 srch_inf->info_level);
d324f08d
PS		 3369 rc = -EINVAL;
3370 goto qdir_exit;
3371 }
3372
3373 req->FileIndex = cpu_to_le32(index);
3374 req->PersistentFileId = persistent_fid;
3375 req->VolatileFileId = volatile_fid;
3376
3377 len = 0x2;
3378 bufptr = req->Buffer;
3379 memcpy(bufptr, &asteriks, len);
3380
3381 req->FileNameOffset =
7c00c3a6 3382 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1);
d324f08d
PS		 3383 req->FileNameLength = cpu_to_le16(len);
3384 /*
3385 * BB could be 30 bytes or so longer if we used SMB2 specific
3386 * buffer lengths, but this is safe and close enough.
3387 */
3388 output_size = min_t(unsigned int, output_size, server->maxBuf);
3389 output_size = min_t(unsigned int, output_size, 2 << 15);
3390 req->OutputBufferLength = cpu_to_le32(output_size);
3391
3392 iov[0].iov_base = (char *)req;
7c00c3a6
RS		 3393 /* 1 for Buffer */
3394 iov[0].iov_len = total_len - 1;
d324f08d
PS		 3395
3396 iov[1].iov_base = (char *)(req->Buffer);
3397 iov[1].iov_len = len;
3398
7c00c3a6 3399 rc = smb2_send_recv(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 3400 cifs_small_buf_release(req);
3401 rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
e5d04887 3402
d324f08d 3403 if (rc) {
31473fc4 3404 if (rc == -ENODATA &&
49f466bd 3405 rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
52755808
PS		 3406 srch_inf->endOfSearch = true;
3407 rc = 0;
3408 }
d324f08d
PS		 3409 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
3410 goto qdir_exit;
3411 }
d324f08d 3412
1fc6ad2f 3413 rc = validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
c1596ff5 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;
977b6170
RS		 3428 srch_inf->srch_entries_start = srch_inf->last_entry =
3429 (char *)rsp + le16_to_cpu(rsp->OutputBufferOffset);
3430 end_of_smb = rsp_iov.iov_len + (char *)rsp;
d324f08d
PS		 3431 srch_inf->entries_in_buffer =
3432 num_entries(srch_inf->srch_entries_start, end_of_smb,
3433 &srch_inf->last_entry, info_buf_size);
3434 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
f96637be
JP		 3435 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
3436 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
3437 srch_inf->srch_entries_start, srch_inf->last_entry);
d324f08d
PS		 3438 if (resp_buftype == CIFS_LARGE_BUFFER)
3439 srch_inf->smallBuf = false;
3440 else if (resp_buftype == CIFS_SMALL_BUFFER)
3441 srch_inf->smallBuf = true;
3442 else
f96637be 3443 cifs_dbg(VFS, "illegal search buffer type\n");
d324f08d 3444
d324f08d
PS		 3445 return rc;
3446
3447qdir_exit:
3448 free_rsp_buf(resp_buftype, rsp);
3449 return rc;
3450}
3451
35143eb5
PS		 3452static int
3453send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
dac95340
SP		 3454 u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
3455 u8 info_type, u32 additional_info, unsigned int num,
3456 void **data, unsigned int *size)
35143eb5
PS		 3457{
3458 struct smb2_set_info_req *req;
3459 struct smb2_set_info_rsp *rsp = NULL;
3460 struct kvec *iov;
da502f7d 3461 struct kvec rsp_iov;
35143eb5
PS		 3462 int rc = 0;
3463 int resp_buftype;
3464 unsigned int i;
35143eb5 3465 struct cifs_ses *ses = tcon->ses;
7fb8986e 3466 int flags = 0;
2fc803ef 3467 unsigned int total_len;
35143eb5 3468
68a6afa7 3469 if (!ses || !(ses->server))
35143eb5
PS		 3470 return -EIO;
3471
3472 if (!num)
3473 return -EINVAL;
3474
6da2ec56 3475 iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL);
35143eb5
PS		 3476 if (!iov)
3477 return -ENOMEM;
3478
2fc803ef 3479 rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, (void **) &req, &total_len);
35143eb5
PS		 3480 if (rc) {
3481 kfree(iov);
3482 return rc;
3483 }
3484
5a77e75f 3485 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3486 flags |= CIFS_TRANSFORM_REQ;
3487
2fc803ef 3488 req->sync_hdr.ProcessId = cpu_to_le32(pid);
c839ff24 3489
dac95340 3490 req->InfoType = info_type;
35143eb5
PS		 3491 req->FileInfoClass = info_class;
3492 req->PersistentFileId = persistent_fid;
3493 req->VolatileFileId = volatile_fid;
dac95340 3494 req->AdditionalInformation = cpu_to_le32(additional_info);
35143eb5 3495
35143eb5 3496 req->BufferOffset =
2fc803ef 3497 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1);
35143eb5
PS		 3498 req->BufferLength = cpu_to_le32(*size);
3499
35143eb5 3500 memcpy(req->Buffer, *data, *size);
2fc803ef 3501 total_len += *size;
35143eb5
PS		 3502
3503 iov[0].iov_base = (char *)req;
2fc803ef
RS		 3504 /* 1 for Buffer */
3505 iov[0].iov_len = total_len - 1;
35143eb5
PS		 3506
3507 for (i = 1; i < num; i++) {
35143eb5
PS		 3508 le32_add_cpu(&req->BufferLength, size[i]);
3509 iov[i].iov_base = (char *)data[i];
3510 iov[i].iov_len = size[i];
3511 }
3512
2fc803ef
RS		 3513 rc = smb2_send_recv(xid, ses, iov, num, &resp_buftype, flags,
3514 &rsp_iov);
da502f7d
PS		 3515 cifs_small_buf_release(req);
3516 rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
35143eb5 3517
eccb4422 3518 if (rc != 0) {
35143eb5 3519 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
eccb4422
SF		 3520 trace_smb3_set_info_err(xid, persistent_fid, tcon->tid,
3521 ses->Suid, info_class, (__u32)info_type, rc);
3522 }
7d3fb24b 3523
35143eb5
PS		 3524 free_rsp_buf(resp_buftype, rsp);
3525 kfree(iov);
3526 return rc;
3527}
3528
3529int
3530SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
3531 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3532{
3533 struct smb2_file_rename_info info;
3534 void **data;
3535 unsigned int size[2];
3536 int rc;
3537 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3538
6da2ec56 3539 data = kmalloc_array(2, sizeof(void *), GFP_KERNEL);
35143eb5
PS		 3540 if (!data)
3541 return -ENOMEM;
3542
3543 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
3544 /* 0 = fail if target already exists */
3545 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3546 info.FileNameLength = cpu_to_le32(len);
3547
3548 data[0] = &info;
3549 size[0] = sizeof(struct smb2_file_rename_info);
3550
3551 data[1] = target_file;
3552 size[1] = len + 2 /* null */;
3553
3554 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3555 current->tgid, FILE_RENAME_INFORMATION, SMB2_O_INFO_FILE,
3556 0, 2, data, size);
35143eb5
PS		 3557 kfree(data);
3558 return rc;
3559}
568798cc 3560
897fba11
SF		 3561int
3562SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
3563 u64 persistent_fid, u64 volatile_fid)
3564{
3565 __u8 delete_pending = 1;
3566 void *data;
3567 unsigned int size;
3568
3569 data = &delete_pending;
3570 size = 1; /* sizeof __u8 */
3571
3572 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3573 current->tgid, FILE_DISPOSITION_INFORMATION, SMB2_O_INFO_FILE,
3574 0, 1, &data, &size);
897fba11
SF		 3575}
3576
568798cc
PS		 3577int
3578SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
3579 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3580{
3581 struct smb2_file_link_info info;
3582 void **data;
3583 unsigned int size[2];
3584 int rc;
3585 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3586
6da2ec56 3587 data = kmalloc_array(2, sizeof(void *), GFP_KERNEL);
568798cc
PS		 3588 if (!data)
3589 return -ENOMEM;
3590
3591 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
3592 /* 0 = fail if link already exists */
3593 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3594 info.FileNameLength = cpu_to_le32(len);
3595
3596 data[0] = &info;
3597 size[0] = sizeof(struct smb2_file_link_info);
3598
3599 data[1] = target_file;
3600 size[1] = len + 2 /* null */;
3601
3602 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3603 current->tgid, FILE_LINK_INFORMATION, SMB2_O_INFO_FILE,
3604 0, 2, data, size);
568798cc
PS		 3605 kfree(data);
3606 return rc;
3607}
c839ff24
PS		 3608
3609int
3610SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
f29ebb47 3611 u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc)
c839ff24
PS		 3612{
3613 struct smb2_file_eof_info info;
3614 void *data;
3615 unsigned int size;
3616
3617 info.EndOfFile = *eof;
3618
3619 data = &info;
3620 size = sizeof(struct smb2_file_eof_info);
3621
f29ebb47
SF		 3622 if (is_falloc)
3623 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3624 pid, FILE_ALLOCATION_INFORMATION, SMB2_O_INFO_FILE,
3625 0, 1, &data, &size);
f29ebb47
SF		 3626 else
3627 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3628 pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE,
3629 0, 1, &data, &size);
c839ff24 3630}
1feeaac7
PS		 3631
3632int
3633SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
3634 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
3635{
3636 unsigned int size;
3637 size = sizeof(FILE_BASIC_INFO);
3638 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3639 current->tgid, FILE_BASIC_INFORMATION, SMB2_O_INFO_FILE,
3640 0, 1, (void **)&buf, &size);
3641}
3642
3643int
3644SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
3645 u64 persistent_fid, u64 volatile_fid,
3646 struct cifs_ntsd *pnntsd, int pacllen, int aclflag)
3647{
3648 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3649 current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag,
3650 1, (void **)&pnntsd, &pacllen);
1feeaac7 3651}
983c88a4 3652
5517554e
RS		 3653int
3654SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
3655 u64 persistent_fid, u64 volatile_fid,
3656 struct smb2_file_full_ea_info *buf, int len)
3657{
3658 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3659 current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE,
3660 0, 1, (void **)&buf, &len);
3661}
3662
983c88a4
PS		 3663int
3664SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
3665 const u64 persistent_fid, const u64 volatile_fid,
3666 __u8 oplock_level)
3667{
3668 int rc;
0d5a288d 3669 struct smb2_oplock_break *req = NULL;
21ad9487 3670 struct cifs_ses *ses = tcon->ses;
7fb8986e 3671 int flags = CIFS_OBREAK_OP;
21ad9487
RS		 3672 unsigned int total_len;
3673 struct kvec iov[1];
3674 struct kvec rsp_iov;
3675 int resp_buf_type;
983c88a4 3676
f96637be 3677 cifs_dbg(FYI, "SMB2_oplock_break\n");
21ad9487
RS		 3678 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
3679 &total_len);
983c88a4
PS		 3680 if (rc)
3681 return rc;
3682
5a77e75f 3683 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3684 flags |= CIFS_TRANSFORM_REQ;
3685
983c88a4
PS		 3686 req->VolatileFid = volatile_fid;
3687 req->PersistentFid = persistent_fid;
3688 req->OplockLevel = oplock_level;
21ad9487 3689 req->sync_hdr.CreditRequest = cpu_to_le16(1);
983c88a4 3690
21ad9487
RS		 3691 flags |= CIFS_NO_RESP;
3692
3693 iov[0].iov_base = (char *)req;
3694 iov[0].iov_len = total_len;
3695
3696 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buf_type, flags, &rsp_iov);
da502f7d 3697 cifs_small_buf_release(req);
983c88a4
PS		 3698
3699 if (rc) {
3700 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 3701 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
983c88a4
PS		 3702 }
3703
3704 return rc;
3705}
6fc05c25
PS		 3706
3707static void
3708copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
3709 struct kstatfs *kst)
3710{
3711 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
3712 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
3713 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
42bec214
SP		 3714 kst->f_bfree = kst->f_bavail =
3715 le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
6fc05c25
PS		 3716 return;
3717}
3718
3719static int
3720build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
3721 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
3722{
c0953f2e 3723 struct TCP_Server_Info *server;
6fc05c25
PS		 3724 int rc;
3725 struct smb2_query_info_req *req;
b2fb7fec 3726 unsigned int total_len;
6fc05c25 3727
f96637be 3728 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
6fc05c25
PS		 3729
3730 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
3731 return -EIO;
3732
c0953f2e
GS		 3733 server = tcon->ses->server;
3734
b2fb7fec
RS		 3735 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
3736 &total_len);
6fc05c25
PS		 3737 if (rc)
3738 return rc;
3739
3740 req->InfoType = SMB2_O_INFO_FILESYSTEM;
3741 req->FileInfoClass = level;
3742 req->PersistentFileId = persistent_fid;
3743 req->VolatileFileId = volatile_fid;
b2fb7fec 3744 /* 1 for pad */
6fc05c25 3745 req->InputBufferOffset =
b2fb7fec 3746 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1);
6fc05c25 3747 req->OutputBufferLength = cpu_to_le32(
1fc6ad2f 3748 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1);
6fc05c25
PS		 3749
3750 iov->iov_base = (char *)req;
b2fb7fec 3751 iov->iov_len = total_len;
6fc05c25
PS		 3752 return 0;
3753}
3754
3755int
3756SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
3757 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
3758{
3759 struct smb2_query_info_rsp *rsp = NULL;
3760 struct kvec iov;
da502f7d 3761 struct kvec rsp_iov;
6fc05c25
PS		 3762 int rc = 0;
3763 int resp_buftype;
3764 struct cifs_ses *ses = tcon->ses;
3765 struct smb2_fs_full_size_info *info = NULL;
7fb8986e 3766 int flags = 0;
6fc05c25
PS		 3767
3768 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
3769 sizeof(struct smb2_fs_full_size_info),
3770 persistent_fid, volatile_fid);
3771 if (rc)
3772 return rc;
3773
5a77e75f 3774 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3775 flags |= CIFS_TRANSFORM_REQ;
3776
b2fb7fec 3777 rc = smb2_send_recv(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d 3778 cifs_small_buf_release(iov.iov_base);
6fc05c25
PS		 3779 if (rc) {
3780 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
34f62640 3781 goto qfsinf_exit;
6fc05c25 3782 }
da502f7d 3783 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
6fc05c25 3784
1fc6ad2f 3785 info = (struct smb2_fs_full_size_info *)(
49f466bd 3786 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1fc6ad2f 3787 rc = validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
c1596ff5 3788 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
6fc05c25
PS		 3789 sizeof(struct smb2_fs_full_size_info));
3790 if (!rc)
3791 copy_fs_info_to_kstatfs(info, fsdata);
3792
34f62640 3793qfsinf_exit:
da502f7d 3794 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
34f62640
SF		 3795 return rc;
3796}
3797
3798int
3799SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2167114c 3800 u64 persistent_fid, u64 volatile_fid, int level)
34f62640
SF		 3801{
3802 struct smb2_query_info_rsp *rsp = NULL;
3803 struct kvec iov;
da502f7d 3804 struct kvec rsp_iov;
34f62640 3805 int rc = 0;
2167114c 3806 int resp_buftype, max_len, min_len;
34f62640
SF		 3807 struct cifs_ses *ses = tcon->ses;
3808 unsigned int rsp_len, offset;
7fb8986e 3809 int flags = 0;
34f62640 3810
2167114c
SF		 3811 if (level == FS_DEVICE_INFORMATION) {
3812 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3813 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3814 } else if (level == FS_ATTRIBUTE_INFORMATION) {
3815 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
3816 min_len = MIN_FS_ATTR_INFO_SIZE;
af6a12ea
SF		 3817 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
3818 max_len = sizeof(struct smb3_fs_ss_info);
3819 min_len = sizeof(struct smb3_fs_ss_info);
2167114c 3820 } else {
af6a12ea 3821 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2167114c
SF		 3822 return -EINVAL;
3823 }
3824
3825 rc = build_qfs_info_req(&iov, tcon, level, max_len,
34f62640
SF		 3826 persistent_fid, volatile_fid);
3827 if (rc)
3828 return rc;
3829
5a77e75f 3830 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3831 flags |= CIFS_TRANSFORM_REQ;
3832
b2fb7fec 3833 rc = smb2_send_recv(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d 3834 cifs_small_buf_release(iov.iov_base);
34f62640
SF		 3835 if (rc) {
3836 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
3837 goto qfsattr_exit;
3838 }
da502f7d 3839 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
34f62640
SF		 3840
3841 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
3842 offset = le16_to_cpu(rsp->OutputBufferOffset);
1fc6ad2f 3843 rc = validate_iov(offset, rsp_len, &rsp_iov, min_len);
2167114c
SF		 3844 if (rc)
3845 goto qfsattr_exit;
3846
3847 if (level == FS_ATTRIBUTE_INFORMATION)
1fc6ad2f 3848 memcpy(&tcon->fsAttrInfo, offset
49f466bd 3849 + (char *)rsp, min_t(unsigned int,
2167114c
SF		 3850 rsp_len, max_len));
3851 else if (level == FS_DEVICE_INFORMATION)
1fc6ad2f 3852 memcpy(&tcon->fsDevInfo, offset
49f466bd 3853 + (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO));
af6a12ea
SF		 3854 else if (level == FS_SECTOR_SIZE_INFORMATION) {
3855 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
1fc6ad2f 3856 (offset + (char *)rsp);
af6a12ea
SF		 3857 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
3858 tcon->perf_sector_size =
3859 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
3860 }
34f62640
SF		 3861
3862qfsattr_exit:
da502f7d 3863 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
6fc05c25
PS		 3864 return rc;
3865}
f7ba7fe6
PS		 3866
3867int
3868smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
3869 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3870 const __u32 num_lock, struct smb2_lock_element *buf)
3871{
3872 int rc = 0;
3873 struct smb2_lock_req *req = NULL;
3874 struct kvec iov[2];
da502f7d 3875 struct kvec rsp_iov;
f7ba7fe6
PS		 3876 int resp_buf_type;
3877 unsigned int count;
7fb8986e 3878 int flags = CIFS_NO_RESP;
ced93679 3879 unsigned int total_len;
f7ba7fe6 3880
f96637be 3881 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
f7ba7fe6 3882
ced93679 3883 rc = smb2_plain_req_init(SMB2_LOCK, tcon, (void **) &req, &total_len);
f7ba7fe6
PS		 3884 if (rc)
3885 return rc;
3886
5a77e75f 3887 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3888 flags |= CIFS_TRANSFORM_REQ;
3889
ced93679 3890 req->sync_hdr.ProcessId = cpu_to_le32(pid);
f7ba7fe6
PS		 3891 req->LockCount = cpu_to_le16(num_lock);
3892
3893 req->PersistentFileId = persist_fid;
3894 req->VolatileFileId = volatile_fid;
3895
3896 count = num_lock * sizeof(struct smb2_lock_element);
f7ba7fe6
PS		 3897
3898 iov[0].iov_base = (char *)req;
ced93679 3899 iov[0].iov_len = total_len - sizeof(struct smb2_lock_element);
f7ba7fe6
PS		 3900 iov[1].iov_base = (char *)buf;
3901 iov[1].iov_len = count;
3902
3903 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
ced93679
RS		 3904 rc = smb2_send_recv(xid, tcon->ses, iov, 2, &resp_buf_type, flags,
3905 &rsp_iov);
da502f7d 3906 cifs_small_buf_release(req);
f7ba7fe6 3907 if (rc) {
f96637be 3908 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
f7ba7fe6 3909 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
eccb4422
SF		 3910 trace_smb3_lock_err(xid, persist_fid, tcon->tid,
3911 tcon->ses->Suid, rc);
f7ba7fe6
PS		 3912 }
3913
3914 return rc;
3915}
3916
3917int
3918SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
3919 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3920 const __u64 length, const __u64 offset, const __u32 lock_flags,
3921 const bool wait)
3922{
3923 struct smb2_lock_element lock;
3924
3925 lock.Offset = cpu_to_le64(offset);
3926 lock.Length = cpu_to_le64(length);
3927 lock.Flags = cpu_to_le32(lock_flags);
3928 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
3929 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
3930
3931 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
3932}
0822f514
PS		 3933
3934int
3935SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
3936 __u8 *lease_key, const __le32 lease_state)
3937{
3938 int rc;
3939 struct smb2_lease_ack *req = NULL;
8eb7998e 3940 struct cifs_ses *ses = tcon->ses;
7fb8986e 3941 int flags = CIFS_OBREAK_OP;
8eb7998e
RS		 3942 unsigned int total_len;
3943 struct kvec iov[1];
3944 struct kvec rsp_iov;
3945 int resp_buf_type;
0822f514 3946
f96637be 3947 cifs_dbg(FYI, "SMB2_lease_break\n");
8eb7998e
RS		 3948 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
3949 &total_len);
0822f514
PS		 3950 if (rc)
3951 return rc;
3952
5a77e75f 3953 if (smb3_encryption_required(tcon))
7fb8986e
PS		 3954 flags |= CIFS_TRANSFORM_REQ;
3955
8eb7998e 3956 req->sync_hdr.CreditRequest = cpu_to_le16(1);
0822f514 3957 req->StructureSize = cpu_to_le16(36);
8eb7998e 3958 total_len += 12;
0822f514
PS		 3959
3960 memcpy(req->LeaseKey, lease_key, 16);
3961 req->LeaseState = lease_state;
3962
8eb7998e
RS		 3963 flags |= CIFS_NO_RESP;
3964
3965 iov[0].iov_base = (char *)req;
3966 iov[0].iov_len = total_len;
3967
3968 rc = smb2_send_recv(xid, ses, iov, 1, &resp_buf_type, flags, &rsp_iov);
da502f7d 3969 cifs_small_buf_release(req);
0822f514
PS		 3970
3971 if (rc) {
3972 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 3973 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
0822f514
PS		 3974 }
3975
3976 return rc;
3977}
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