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Merge branch 'docs-next' of git://git.lwn.net/linux
[thirdparty/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"
ec2e4523
PS		 51
52/*
53 * The following table defines the expected "StructureSize" of SMB2 requests
54 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
55 *
56 * Note that commands are defined in smb2pdu.h in le16 but the array below is
57 * indexed by command in host byte order.
58 */
59static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
60 /* SMB2_NEGOTIATE */ 36,
61 /* SMB2_SESSION_SETUP */ 25,
62 /* SMB2_LOGOFF */ 4,
63 /* SMB2_TREE_CONNECT */ 9,
64 /* SMB2_TREE_DISCONNECT */ 4,
65 /* SMB2_CREATE */ 57,
66 /* SMB2_CLOSE */ 24,
67 /* SMB2_FLUSH */ 24,
68 /* SMB2_READ */ 49,
69 /* SMB2_WRITE */ 49,
70 /* SMB2_LOCK */ 48,
71 /* SMB2_IOCTL */ 57,
72 /* SMB2_CANCEL */ 4,
73 /* SMB2_ECHO */ 4,
74 /* SMB2_QUERY_DIRECTORY */ 33,
75 /* SMB2_CHANGE_NOTIFY */ 32,
76 /* SMB2_QUERY_INFO */ 41,
77 /* SMB2_SET_INFO */ 33,
78 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
79};
80
7fb8986e
PS		 81static int encryption_required(const struct cifs_tcon *tcon)
82{
ae6f8dd4
PS		 83 if (!tcon)
84 return 0;
7fb8986e
PS		 85 if ((tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
86 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
87 return 1;
ae6f8dd4
PS		 88 if (tcon->seal &&
89 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
90 return 1;
7fb8986e
PS		 91 return 0;
92}
ec2e4523
PS		 93
94static void
cb200bd6 95smb2_hdr_assemble(struct smb2_sync_hdr *shdr, __le16 smb2_cmd,
ec2e4523
PS		 96 const struct cifs_tcon *tcon)
97{
31473fc4
PS		 98 shdr->ProtocolId = SMB2_PROTO_NUMBER;
99 shdr->StructureSize = cpu_to_le16(64);
100 shdr->Command = smb2_cmd;
7d414f39
RL		 101 if (tcon && tcon->ses && tcon->ses->server) {
102 struct TCP_Server_Info *server = tcon->ses->server;
103
104 spin_lock(&server->req_lock);
105 /* Request up to 2 credits but don't go over the limit. */
141891f4 106 if (server->credits >= server->max_credits)
31473fc4 107 shdr->CreditRequest = cpu_to_le16(0);
7d414f39 108 else
31473fc4 109 shdr->CreditRequest = cpu_to_le16(
141891f4 110 min_t(int, server->max_credits -
7d414f39
RL		 111 server->credits, 2));
112 spin_unlock(&server->req_lock);
113 } else {
31473fc4 114 shdr->CreditRequest = cpu_to_le16(2);
7d414f39 115 }
31473fc4 116 shdr->ProcessId = cpu_to_le32((__u16)current->tgid);
ec2e4523
PS		 117
118 if (!tcon)
119 goto out;
120
2b80d049
SF		 121 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
122 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
1dc92c45 123 if ((tcon->ses) && (tcon->ses->server) &&
84ceeb96 124 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
31473fc4 125 shdr->CreditCharge = cpu_to_le16(1);
2b80d049
SF		 126 /* else CreditCharge MBZ */
127
31473fc4 128 shdr->TreeId = tcon->tid;
ec2e4523
PS		 129 /* Uid is not converted */
130 if (tcon->ses)
31473fc4 131 shdr->SessionId = tcon->ses->Suid;
f87ab88b
SF		 132
133 /*
134 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
135 * to pass the path on the Open SMB prefixed by \\server\share.
136 * Not sure when we would need to do the augmented path (if ever) and
137 * setting this flag breaks the SMB2 open operation since it is
138 * illegal to send an empty path name (without \\server\share prefix)
139 * when the DFS flag is set in the SMB open header. We could
140 * consider setting the flag on all operations other than open
141 * but it is safer to net set it for now.
142 */
143/* if (tcon->share_flags & SHI1005_FLAGS_DFS)
31473fc4 144 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
f87ab88b 145
7fb8986e
PS		 146 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign &&
147 !encryption_required(tcon))
31473fc4 148 shdr->Flags |= SMB2_FLAGS_SIGNED;
ec2e4523 149out:
ec2e4523
PS		 150 return;
151}
152
153static int
154smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
155{
156 int rc = 0;
aa24d1e9
PS		 157 struct nls_table *nls_codepage;
158 struct cifs_ses *ses;
159 struct TCP_Server_Info *server;
160
161 /*
162 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
163 * check for tcp and smb session status done differently
164 * for those three - in the calling routine.
165 */
166 if (tcon == NULL)
167 return rc;
168
169 if (smb2_command == SMB2_TREE_CONNECT)
170 return rc;
171
172 if (tcon->tidStatus == CifsExiting) {
173 /*
174 * only tree disconnect, open, and write,
175 * (and ulogoff which does not have tcon)
176 * are allowed as we start force umount.
177 */
178 if ((smb2_command != SMB2_WRITE) &&
179 (smb2_command != SMB2_CREATE) &&
180 (smb2_command != SMB2_TREE_DISCONNECT)) {
f96637be
JP		 181 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
182 smb2_command);
aa24d1e9
PS		 183 return -ENODEV;
184 }
185 }
186 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
187 (!tcon->ses->server))
188 return -EIO;
189
190 ses = tcon->ses;
191 server = ses->server;
192
193 /*
194 * Give demultiplex thread up to 10 seconds to reconnect, should be
195 * greater than cifs socket timeout which is 7 seconds
196 */
197 while (server->tcpStatus == CifsNeedReconnect) {
198 /*
199 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
200 * here since they are implicitly done when session drops.
201 */
202 switch (smb2_command) {
203 /*
204 * BB Should we keep oplock break and add flush to exceptions?
205 */
206 case SMB2_TREE_DISCONNECT:
207 case SMB2_CANCEL:
208 case SMB2_CLOSE:
209 case SMB2_OPLOCK_BREAK:
210 return -EAGAIN;
211 }
212
213 wait_event_interruptible_timeout(server->response_q,
214 (server->tcpStatus != CifsNeedReconnect), 10 * HZ);
215
216 /* are we still trying to reconnect? */
217 if (server->tcpStatus != CifsNeedReconnect)
218 break;
219
220 /*
221 * on "soft" mounts we wait once. Hard mounts keep
222 * retrying until process is killed or server comes
223 * back on-line
224 */
225 if (!tcon->retry) {
f96637be 226 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
aa24d1e9
PS		 227 return -EHOSTDOWN;
228 }
229 }
230
231 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
232 return rc;
233
234 nls_codepage = load_nls_default();
235
236 /*
237 * need to prevent multiple threads trying to simultaneously reconnect
238 * the same SMB session
239 */
240 mutex_lock(&tcon->ses->session_mutex);
241 rc = cifs_negotiate_protocol(0, tcon->ses);
242 if (!rc && tcon->ses->need_reconnect)
243 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
244
245 if (rc || !tcon->need_reconnect) {
246 mutex_unlock(&tcon->ses->session_mutex);
247 goto out;
248 }
249
250 cifs_mark_open_files_invalid(tcon);
96a988ff
PS		 251 if (tcon->use_persistent)
252 tcon->need_reopen_files = true;
52ace1ef 253
aa24d1e9
PS		 254 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
255 mutex_unlock(&tcon->ses->session_mutex);
52ace1ef 256
f96637be 257 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
aa24d1e9
PS		 258 if (rc)
259 goto out;
96a988ff
PS		 260
261 if (smb2_command != SMB2_INTERNAL_CMD)
262 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
263
aa24d1e9 264 atomic_inc(&tconInfoReconnectCount);
aa24d1e9
PS		 265out:
266 /*
267 * Check if handle based operation so we know whether we can continue
268 * or not without returning to caller to reset file handle.
269 */
270 /*
271 * BB Is flush done by server on drop of tcp session? Should we special
272 * case it and skip above?
273 */
274 switch (smb2_command) {
275 case SMB2_FLUSH:
276 case SMB2_READ:
277 case SMB2_WRITE:
278 case SMB2_LOCK:
279 case SMB2_IOCTL:
280 case SMB2_QUERY_DIRECTORY:
281 case SMB2_CHANGE_NOTIFY:
282 case SMB2_QUERY_INFO:
283 case SMB2_SET_INFO:
4772c795 284 rc = -EAGAIN;
aa24d1e9
PS		 285 }
286 unload_nls(nls_codepage);
ec2e4523
PS		 287 return rc;
288}
289
cb200bd6
PS		 290static void
291fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, void *buf,
292 unsigned int *total_len)
293{
294 struct smb2_sync_pdu *spdu = (struct smb2_sync_pdu *)buf;
295 /* lookup word count ie StructureSize from table */
296 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)];
297
298 /*
299 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
300 * largest operations (Create)
301 */
302 memset(buf, 0, 256);
303
304 smb2_hdr_assemble(&spdu->sync_hdr, smb2_command, tcon);
305 spdu->StructureSize2 = cpu_to_le16(parmsize);
306
307 *total_len = parmsize + sizeof(struct smb2_sync_hdr);
308}
309
b8f57ee8
PS		 310/* init request without RFC1001 length at the beginning */
311static int
312smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
313 void **request_buf, unsigned int *total_len)
314{
315 int rc;
316 struct smb2_sync_hdr *shdr;
317
318 rc = smb2_reconnect(smb2_command, tcon);
319 if (rc)
320 return rc;
321
322 /* BB eventually switch this to SMB2 specific small buf size */
323 *request_buf = cifs_small_buf_get();
324 if (*request_buf == NULL) {
325 /* BB should we add a retry in here if not a writepage? */
326 return -ENOMEM;
327 }
328
329 shdr = (struct smb2_sync_hdr *)(*request_buf);
330
331 fill_small_buf(smb2_command, tcon, shdr, total_len);
332
333 if (tcon != NULL) {
334#ifdef CONFIG_CIFS_STATS2
335 uint16_t com_code = le16_to_cpu(smb2_command);
336
337 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
338#endif
339 cifs_stats_inc(&tcon->num_smbs_sent);
340 }
341
342 return rc;
343}
344
ec2e4523
PS		 345/*
346 * Allocate and return pointer to an SMB request hdr, and set basic
347 * SMB information in the SMB header. If the return code is zero, this
b8f57ee8
PS		 348 * function must have filled in request_buf pointer. The returned buffer
349 * has RFC1001 length at the beginning.
ec2e4523
PS		 350 */
351static int
352small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
353 void **request_buf)
354{
cb200bd6
PS		 355 int rc;
356 unsigned int total_len;
357 struct smb2_pdu *pdu;
ec2e4523
PS		 358
359 rc = smb2_reconnect(smb2_command, tcon);
360 if (rc)
361 return rc;
362
363 /* BB eventually switch this to SMB2 specific small buf size */
364 *request_buf = cifs_small_buf_get();
365 if (*request_buf == NULL) {
366 /* BB should we add a retry in here if not a writepage? */
367 return -ENOMEM;
368 }
369
cb200bd6
PS		 370 pdu = (struct smb2_pdu *)(*request_buf);
371
372 fill_small_buf(smb2_command, tcon, get_sync_hdr(pdu), &total_len);
373
374 /* Note this is only network field converted to big endian */
375 pdu->hdr.smb2_buf_length = cpu_to_be32(total_len);
ec2e4523
PS		 376
377 if (tcon != NULL) {
378#ifdef CONFIG_CIFS_STATS2
ec2e4523
PS		 379 uint16_t com_code = le16_to_cpu(smb2_command);
380 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
ec2e4523
PS		 381#endif
382 cifs_stats_inc(&tcon->num_smbs_sent);
383 }
384
385 return rc;
386}
387
ebb3a9d4
SF		 388#ifdef CONFIG_CIFS_SMB311
389/* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
390#define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
391
392
393#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
394#define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
395
396static void
397build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
398{
399 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
400 pneg_ctxt->DataLength = cpu_to_le16(38);
401 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
402 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
403 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
404 pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
405}
406
407static void
408build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
409{
410 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
411 pneg_ctxt->DataLength = cpu_to_le16(6);
412 pneg_ctxt->CipherCount = cpu_to_le16(2);
413 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
414 pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM;
415}
416
417static void
418assemble_neg_contexts(struct smb2_negotiate_req *req)
419{
420
421 /* +4 is to account for the RFC1001 len field */
422 char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT + 4;
423
424 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
425 /* Add 2 to size to round to 8 byte boundary */
426 pneg_ctxt += 2 + sizeof(struct smb2_preauth_neg_context);
427 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
428 req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
429 req->NegotiateContextCount = cpu_to_le16(2);
430 inc_rfc1001_len(req, 4 + sizeof(struct smb2_preauth_neg_context) + 2
431 + sizeof(struct smb2_encryption_neg_context)); /* calculate hash */
432}
433#else
434static void assemble_neg_contexts(struct smb2_negotiate_req *req)
435{
436 return;
437}
438#endif /* SMB311 */
439
ec2e4523
PS		 440/*
441 *
442 * SMB2 Worker functions follow:
443 *
444 * The general structure of the worker functions is:
445 * 1) Call smb2_init (assembles SMB2 header)
446 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
447 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
448 * 4) Decode SMB2 command specific fields in the fixed length area
449 * 5) Decode variable length data area (if any for this SMB2 command type)
450 * 6) Call free smb buffer
451 * 7) return
452 *
453 */
454
455int
456SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
457{
458 struct smb2_negotiate_req *req;
459 struct smb2_negotiate_rsp *rsp;
460 struct kvec iov[1];
da502f7d 461 struct kvec rsp_iov;
ec2e4523
PS		 462 int rc = 0;
463 int resp_buftype;
3534b850 464 struct TCP_Server_Info *server = ses->server;
ec2e4523
PS		 465 int blob_offset, blob_length;
466 char *security_blob;
467 int flags = CIFS_NEG_OP;
468
f96637be 469 cifs_dbg(FYI, "Negotiate protocol\n");
ec2e4523 470
3534b850
JL		 471 if (!server) {
472 WARN(1, "%s: server is NULL!\n", __func__);
473 return -EIO;
ec2e4523
PS		 474 }
475
476 rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
477 if (rc)
478 return rc;
479
31473fc4 480 req->hdr.sync_hdr.SessionId = 0;
ec2e4523 481
e4aa25e7 482 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
ec2e4523 483
e4aa25e7
SF		 484 req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */
485 inc_rfc1001_len(req, 2);
ec2e4523
PS		 486
487 /* only one of SMB2 signing flags may be set in SMB2 request */
38d77c50 488 if (ses->sign)
9cd2e62c 489 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
38d77c50 490 else if (global_secflags & CIFSSEC_MAY_SIGN)
9cd2e62c 491 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
38d77c50
JL		 492 else
493 req->SecurityMode = 0;
ec2e4523 494
e4aa25e7 495 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
ec2e4523 496
3c5f9be1
SF		 497 /* ClientGUID must be zero for SMB2.02 dialect */
498 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
499 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
ebb3a9d4 500 else {
3c5f9be1
SF		 501 memcpy(req->ClientGUID, server->client_guid,
502 SMB2_CLIENT_GUID_SIZE);
ebb3a9d4
SF		 503 if (ses->server->vals->protocol_id == SMB311_PROT_ID)
504 assemble_neg_contexts(req);
505 }
ec2e4523
PS		 506 iov[0].iov_base = (char *)req;
507 /* 4 for rfc1002 length field */
508 iov[0].iov_len = get_rfc1002_length(req) + 4;
509
da502f7d
PS		 510 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
511 cifs_small_buf_release(req);
512 rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base;
ec2e4523
PS		 513 /*
514 * No tcon so can't do
515 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
516 */
7e682f76
SF		 517 if (rc == -EOPNOTSUPP) {
518 cifs_dbg(VFS, "Dialect not supported by server. Consider "
519 "specifying vers=1.0 or vers=2.1 on mount for accessing"
520 " older servers\n");
521 goto neg_exit;
522 } else if (rc != 0)
ec2e4523
PS		 523 goto neg_exit;
524
f96637be 525 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
ec2e4523 526
e4aa25e7
SF		 527 /* BB we may eventually want to match the negotiated vs. requested
528 dialect, even though we are only requesting one at a time */
529 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
f96637be 530 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
e4aa25e7 531 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
f96637be 532 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
e4aa25e7 533 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
f96637be 534 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
20b6d8b4
SF		 535 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
536 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
5f7fbf73
SF		 537#ifdef CONFIG_CIFS_SMB311
538 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
539 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
540#endif /* SMB311 */
ec2e4523 541 else {
f799d623 542 cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
f96637be 543 le16_to_cpu(rsp->DialectRevision));
ec2e4523
PS		 544 rc = -EIO;
545 goto neg_exit;
546 }
547 server->dialect = le16_to_cpu(rsp->DialectRevision);
548
e598d1d8
JL		 549 /* SMB2 only has an extended negflavor */
550 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
2365c4ea
PS		 551 /* set it to the maximum buffer size value we can send with 1 credit */
552 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
553 SMB2_MAX_BUFFER_SIZE);
ec2e4523
PS		 554 server->max_read = le32_to_cpu(rsp->MaxReadSize);
555 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
556 /* BB Do we need to validate the SecurityMode? */
557 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
558 server->capabilities = le32_to_cpu(rsp->Capabilities);
29e20f9c
PS		 559 /* Internal types */
560 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
ec2e4523
PS		 561
562 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
563 &rsp->hdr);
5d875cc9
SF		 564 /*
565 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
566 * for us will be
567 * ses->sectype = RawNTLMSSP;
568 * but for time being this is our only auth choice so doesn't matter.
569 * We just found a server which sets blob length to zero expecting raw.
570 */
67dbea2c 571 if (blob_length == 0) {
5d875cc9 572 cifs_dbg(FYI, "missing security blob on negprot\n");
67dbea2c
PS		 573 server->sec_ntlmssp = true;
574 }
3c1bf7e4 575
38d77c50 576 rc = cifs_enable_signing(server, ses->sign);
9ddec561
JL		 577 if (rc)
578 goto neg_exit;
ceb1b0b9 579 if (blob_length) {
ebdd207e 580 rc = decode_negTokenInit(security_blob, blob_length, server);
ceb1b0b9
SF		 581 if (rc == 1)
582 rc = 0;
583 else if (rc == 0)
584 rc = -EIO;
ec2e4523 585 }
ec2e4523
PS		 586neg_exit:
587 free_rsp_buf(resp_buftype, rsp);
588 return rc;
589}
5478f9ba 590
ff1c038a
SF		 591int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
592{
593 int rc = 0;
594 struct validate_negotiate_info_req vneg_inbuf;
595 struct validate_negotiate_info_rsp *pneg_rsp;
596 u32 rsplen;
597
598 cifs_dbg(FYI, "validate negotiate\n");
599
600 /*
601 * validation ioctl must be signed, so no point sending this if we
602 * can not sign it. We could eventually change this to selectively
603 * sign just this, the first and only signed request on a connection.
604 * This is good enough for now since a user who wants better security
605 * would also enable signing on the mount. Having validation of
606 * negotiate info for signed connections helps reduce attack vectors
607 */
608 if (tcon->ses->server->sign == false)
609 return 0; /* validation requires signing */
610
611 vneg_inbuf.Capabilities =
612 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
39552ea8
SP		 613 memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid,
614 SMB2_CLIENT_GUID_SIZE);
ff1c038a
SF		 615
616 if (tcon->ses->sign)
617 vneg_inbuf.SecurityMode =
618 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
619 else if (global_secflags & CIFSSEC_MAY_SIGN)
620 vneg_inbuf.SecurityMode =
621 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
622 else
623 vneg_inbuf.SecurityMode = 0;
624
625 vneg_inbuf.DialectCount = cpu_to_le16(1);
626 vneg_inbuf.Dialects[0] =
627 cpu_to_le16(tcon->ses->server->vals->protocol_id);
628
629 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
630 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
51146625 631 false /* use_ipc */,
ff1c038a
SF		 632 (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
633 (char **)&pneg_rsp, &rsplen);
634
635 if (rc != 0) {
636 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
637 return -EIO;
638 }
639
640 if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
7db0a6ef
SF		 641 cifs_dbg(VFS, "invalid protocol negotiate response size: %d\n",
642 rsplen);
643
644 /* relax check since Mac returns max bufsize allowed on ioctl */
645 if (rsplen > CIFSMaxBufSize)
646 return -EIO;
ff1c038a
SF		 647 }
648
649 /* check validate negotiate info response matches what we got earlier */
650 if (pneg_rsp->Dialect !=
651 cpu_to_le16(tcon->ses->server->vals->protocol_id))
652 goto vneg_out;
653
654 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
655 goto vneg_out;
656
657 /* do not validate server guid because not saved at negprot time yet */
658
659 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
660 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
661 goto vneg_out;
662
663 /* validate negotiate successful */
664 cifs_dbg(FYI, "validate negotiate info successful\n");
665 return 0;
666
667vneg_out:
668 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
669 return -EIO;
670}
671
ef65aaed
SP		 672enum securityEnum
673smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
674{
675 switch (requested) {
676 case Kerberos:
677 case RawNTLMSSP:
678 return requested;
679 case NTLMv2:
680 return RawNTLMSSP;
681 case Unspecified:
682 if (server->sec_ntlmssp &&
683 (global_secflags & CIFSSEC_MAY_NTLMSSP))
684 return RawNTLMSSP;
685 if ((server->sec_kerberos || server->sec_mskerberos) &&
686 (global_secflags & CIFSSEC_MAY_KRB5))
687 return Kerberos;
688 /* Fallthrough */
689 default:
690 return Unspecified;
691 }
692}
693
3baf1a7b
SP		 694struct SMB2_sess_data {
695 unsigned int xid;
696 struct cifs_ses *ses;
697 struct nls_table *nls_cp;
698 void (*func)(struct SMB2_sess_data *);
699 int result;
700 u64 previous_session;
701
702 /* we will send the SMB in three pieces:
703 * a fixed length beginning part, an optional
704 * SPNEGO blob (which can be zero length), and a
705 * last part which will include the strings
706 * and rest of bcc area. This allows us to avoid
707 * a large buffer 17K allocation
708 */
709 int buf0_type;
710 struct kvec iov[2];
711};
712
713static int
714SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
715{
716 int rc;
717 struct cifs_ses *ses = sess_data->ses;
718 struct smb2_sess_setup_req *req;
719 struct TCP_Server_Info *server = ses->server;
720
721 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
722 if (rc)
723 return rc;
724
31473fc4
PS		 725 /* First session, not a reauthenticate */
726 req->hdr.sync_hdr.SessionId = 0;
3baf1a7b
SP		 727
728 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
729 req->PreviousSessionId = sess_data->previous_session;
730
731 req->Flags = 0; /* MBZ */
732 /* to enable echos and oplocks */
31473fc4 733 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(3);
3baf1a7b
SP		 734
735 /* only one of SMB2 signing flags may be set in SMB2 request */
736 if (server->sign)
737 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
738 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
739 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
740 else
741 req->SecurityMode = 0;
742
743 req->Capabilities = 0;
744 req->Channel = 0; /* MBZ */
745
746 sess_data->iov[0].iov_base = (char *)req;
747 /* 4 for rfc1002 length field and 1 for pad */
748 sess_data->iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
749 /*
750 * This variable will be used to clear the buffer
751 * allocated above in case of any error in the calling function.
752 */
753 sess_data->buf0_type = CIFS_SMALL_BUFFER;
754
755 return 0;
756}
757
758static void
759SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
760{
761 free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
762 sess_data->buf0_type = CIFS_NO_BUFFER;
763}
764
765static int
766SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
767{
768 int rc;
769 struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
da502f7d 770 struct kvec rsp_iov = { NULL, 0 };
3baf1a7b
SP		 771
772 /* Testing shows that buffer offset must be at location of Buffer[0] */
773 req->SecurityBufferOffset =
774 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
775 1 /* pad */ - 4 /* rfc1001 len */);
776 req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
777
778 inc_rfc1001_len(req, sess_data->iov[1].iov_len - 1 /* pad */);
779
780 /* BB add code to build os and lm fields */
781
782 rc = SendReceive2(sess_data->xid, sess_data->ses,
783 sess_data->iov, 2,
784 &sess_data->buf0_type,
da502f7d
PS		 785 CIFS_LOG_ERROR | CIFS_NEG_OP, &rsp_iov);
786 cifs_small_buf_release(sess_data->iov[0].iov_base);
787 memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
3baf1a7b
SP		 788
789 return rc;
790}
791
792static int
793SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
794{
795 int rc = 0;
796 struct cifs_ses *ses = sess_data->ses;
797
798 mutex_lock(&ses->server->srv_mutex);
cabfb368 799 if (ses->server->ops->generate_signingkey) {
3baf1a7b 800 rc = ses->server->ops->generate_signingkey(ses);
3baf1a7b
SP		 801 if (rc) {
802 cifs_dbg(FYI,
803 "SMB3 session key generation failed\n");
804 mutex_unlock(&ses->server->srv_mutex);
cabfb368 805 return rc;
3baf1a7b
SP		 806 }
807 }
808 if (!ses->server->session_estab) {
809 ses->server->sequence_number = 0x2;
810 ses->server->session_estab = true;
811 }
812 mutex_unlock(&ses->server->srv_mutex);
813
814 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
815 spin_lock(&GlobalMid_Lock);
816 ses->status = CifsGood;
817 ses->need_reconnect = false;
818 spin_unlock(&GlobalMid_Lock);
3baf1a7b
SP		 819 return rc;
820}
821
822#ifdef CONFIG_CIFS_UPCALL
823static void
824SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
825{
826 int rc;
827 struct cifs_ses *ses = sess_data->ses;
828 struct cifs_spnego_msg *msg;
829 struct key *spnego_key = NULL;
830 struct smb2_sess_setup_rsp *rsp = NULL;
831
832 rc = SMB2_sess_alloc_buffer(sess_data);
833 if (rc)
834 goto out;
835
836 spnego_key = cifs_get_spnego_key(ses);
837 if (IS_ERR(spnego_key)) {
838 rc = PTR_ERR(spnego_key);
839 spnego_key = NULL;
840 goto out;
841 }
842
843 msg = spnego_key->payload.data[0];
844 /*
845 * check version field to make sure that cifs.upcall is
846 * sending us a response in an expected form
847 */
848 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
849 cifs_dbg(VFS,
850 "bad cifs.upcall version. Expected %d got %d",
851 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
852 rc = -EKEYREJECTED;
853 goto out_put_spnego_key;
854 }
855
856 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
857 GFP_KERNEL);
858 if (!ses->auth_key.response) {
859 cifs_dbg(VFS,
860 "Kerberos can't allocate (%u bytes) memory",
861 msg->sesskey_len);
862 rc = -ENOMEM;
863 goto out_put_spnego_key;
864 }
865 ses->auth_key.len = msg->sesskey_len;
866
867 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
868 sess_data->iov[1].iov_len = msg->secblob_len;
869
870 rc = SMB2_sess_sendreceive(sess_data);
871 if (rc)
872 goto out_put_spnego_key;
873
874 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
31473fc4 875 ses->Suid = rsp->hdr.sync_hdr.SessionId;
3baf1a7b
SP		 876
877 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
3baf1a7b
SP		 878
879 rc = SMB2_sess_establish_session(sess_data);
880out_put_spnego_key:
881 key_invalidate(spnego_key);
882 key_put(spnego_key);
883out:
884 sess_data->result = rc;
885 sess_data->func = NULL;
886 SMB2_sess_free_buffer(sess_data);
887}
888#else
889static void
890SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
891{
892 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
893 sess_data->result = -EOPNOTSUPP;
894 sess_data->func = NULL;
895}
896#endif
897
166cea4d
SP		 898static void
899SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
900
901static void
902SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
5478f9ba 903{
166cea4d
SP		 904 int rc;
905 struct cifs_ses *ses = sess_data->ses;
5478f9ba 906 struct smb2_sess_setup_rsp *rsp = NULL;
166cea4d 907 char *ntlmssp_blob = NULL;
5478f9ba 908 bool use_spnego = false; /* else use raw ntlmssp */
166cea4d 909 u16 blob_length = 0;
d4e63bd6 910
5478f9ba
PS		 911 /*
912 * If memory allocation is successful, caller of this function
913 * frees it.
914 */
915 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
166cea4d
SP		 916 if (!ses->ntlmssp) {
917 rc = -ENOMEM;
918 goto out_err;
919 }
5c234aa5 920 ses->ntlmssp->sesskey_per_smbsess = true;
5478f9ba 921
166cea4d 922 rc = SMB2_sess_alloc_buffer(sess_data);
5478f9ba 923 if (rc)
166cea4d 924 goto out_err;
5478f9ba 925
166cea4d
SP		 926 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
927 GFP_KERNEL);
928 if (ntlmssp_blob == NULL) {
929 rc = -ENOMEM;
930 goto out;
931 }
c2afb814 932
166cea4d
SP		 933 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
934 if (use_spnego) {
935 /* BB eventually need to add this */
936 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
937 rc = -EOPNOTSUPP;
938 goto out;
939 } else {
940 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
941 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
942 }
943 sess_data->iov[1].iov_base = ntlmssp_blob;
944 sess_data->iov[1].iov_len = blob_length;
c2afb814 945
166cea4d
SP		 946 rc = SMB2_sess_sendreceive(sess_data);
947 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
5478f9ba 948
166cea4d
SP		 949 /* If true, rc here is expected and not an error */
950 if (sess_data->buf0_type != CIFS_NO_BUFFER &&
31473fc4 951 rsp->hdr.sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
166cea4d 952 rc = 0;
38d77c50 953
166cea4d
SP		 954 if (rc)
955 goto out;
5478f9ba 956
166cea4d
SP		 957 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
958 le16_to_cpu(rsp->SecurityBufferOffset)) {
959 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
960 le16_to_cpu(rsp->SecurityBufferOffset));
5478f9ba 961 rc = -EIO;
166cea4d 962 goto out;
5478f9ba 963 }
166cea4d
SP		 964 rc = decode_ntlmssp_challenge(rsp->Buffer,
965 le16_to_cpu(rsp->SecurityBufferLength), ses);
966 if (rc)
967 goto out;
5478f9ba 968
166cea4d 969 cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
5478f9ba 970
5478f9ba 971
31473fc4 972 ses->Suid = rsp->hdr.sync_hdr.SessionId;
166cea4d 973 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
166cea4d
SP		 974
975out:
976 kfree(ntlmssp_blob);
977 SMB2_sess_free_buffer(sess_data);
978 if (!rc) {
979 sess_data->result = 0;
980 sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
981 return;
982 }
983out_err:
984 kfree(ses->ntlmssp);
985 ses->ntlmssp = NULL;
986 sess_data->result = rc;
987 sess_data->func = NULL;
988}
5478f9ba 989
166cea4d
SP		 990static void
991SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
992{
993 int rc;
994 struct cifs_ses *ses = sess_data->ses;
995 struct smb2_sess_setup_req *req;
996 struct smb2_sess_setup_rsp *rsp = NULL;
997 unsigned char *ntlmssp_blob = NULL;
998 bool use_spnego = false; /* else use raw ntlmssp */
999 u16 blob_length = 0;
5478f9ba 1000
166cea4d
SP		 1001 rc = SMB2_sess_alloc_buffer(sess_data);
1002 if (rc)
1003 goto out;
5478f9ba 1004
166cea4d 1005 req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
31473fc4 1006 req->hdr.sync_hdr.SessionId = ses->Suid;
166cea4d
SP		 1007
1008 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
1009 sess_data->nls_cp);
1010 if (rc) {
1011 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
1012 goto out;
5478f9ba
PS		 1013 }
1014
166cea4d
SP		 1015 if (use_spnego) {
1016 /* BB eventually need to add this */
1017 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1018 rc = -EOPNOTSUPP;
1019 goto out;
1020 }
1021 sess_data->iov[1].iov_base = ntlmssp_blob;
1022 sess_data->iov[1].iov_len = blob_length;
5478f9ba 1023
166cea4d
SP		 1024 rc = SMB2_sess_sendreceive(sess_data);
1025 if (rc)
1026 goto out;
1027
1028 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1029
31473fc4 1030 ses->Suid = rsp->hdr.sync_hdr.SessionId;
5478f9ba 1031 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
5478f9ba 1032
166cea4d
SP		 1033 rc = SMB2_sess_establish_session(sess_data);
1034out:
1035 kfree(ntlmssp_blob);
1036 SMB2_sess_free_buffer(sess_data);
1037 kfree(ses->ntlmssp);
1038 ses->ntlmssp = NULL;
1039 sess_data->result = rc;
1040 sess_data->func = NULL;
1041}
d4e63bd6 1042
166cea4d
SP		 1043static int
1044SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data)
1045{
ef65aaed
SP		 1046 int type;
1047
1048 type = smb2_select_sectype(ses->server, ses->sectype);
1049 cifs_dbg(FYI, "sess setup type %d\n", type);
1050 if (type == Unspecified) {
1051 cifs_dbg(VFS,
1052 "Unable to select appropriate authentication method!");
1053 return -EINVAL;
1054 }
d4e63bd6 1055
ef65aaed 1056 switch (type) {
166cea4d
SP		 1057 case Kerberos:
1058 sess_data->func = SMB2_auth_kerberos;
1059 break;
1060 case RawNTLMSSP:
1061 sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
1062 break;
1063 default:
ef65aaed 1064 cifs_dbg(VFS, "secType %d not supported!\n", type);
166cea4d 1065 return -EOPNOTSUPP;
d4e63bd6
SP		 1066 }
1067
166cea4d
SP		 1068 return 0;
1069}
1070
1071int
1072SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
1073 const struct nls_table *nls_cp)
1074{
1075 int rc = 0;
1076 struct TCP_Server_Info *server = ses->server;
1077 struct SMB2_sess_data *sess_data;
1078
1079 cifs_dbg(FYI, "Session Setup\n");
1080
1081 if (!server) {
1082 WARN(1, "%s: server is NULL!\n", __func__);
1083 return -EIO;
d4e63bd6 1084 }
d4e63bd6 1085
166cea4d
SP		 1086 sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
1087 if (!sess_data)
1088 return -ENOMEM;
1089
1090 rc = SMB2_select_sec(ses, sess_data);
1091 if (rc)
1092 goto out;
1093 sess_data->xid = xid;
1094 sess_data->ses = ses;
1095 sess_data->buf0_type = CIFS_NO_BUFFER;
1096 sess_data->nls_cp = (struct nls_table *) nls_cp;
1097
1098 while (sess_data->func)
1099 sess_data->func(sess_data);
1100
3baf1a7b 1101 rc = sess_data->result;
166cea4d 1102out:
3baf1a7b 1103 kfree(sess_data);
5478f9ba
PS		 1104 return rc;
1105}
1106
1107int
1108SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
1109{
1110 struct smb2_logoff_req *req; /* response is also trivial struct */
1111 int rc = 0;
1112 struct TCP_Server_Info *server;
7fb8986e 1113 int flags = 0;
5478f9ba 1114
f96637be 1115 cifs_dbg(FYI, "disconnect session %p\n", ses);
5478f9ba
PS		 1116
1117 if (ses && (ses->server))
1118 server = ses->server;
1119 else
1120 return -EIO;
1121
eb4c7df6
SP		 1122 /* no need to send SMB logoff if uid already closed due to reconnect */
1123 if (ses->need_reconnect)
1124 goto smb2_session_already_dead;
1125
5478f9ba
PS		 1126 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
1127 if (rc)
1128 return rc;
1129
1130 /* since no tcon, smb2_init can not do this, so do here */
31473fc4 1131 req->hdr.sync_hdr.SessionId = ses->Suid;
7fb8986e
PS		 1132
1133 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
1134 flags |= CIFS_TRANSFORM_REQ;
1135 else if (server->sign)
31473fc4 1136 req->hdr.sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
5478f9ba 1137
7fb8986e 1138 rc = SendReceiveNoRsp(xid, ses, (char *) req, flags);
da502f7d 1139 cifs_small_buf_release(req);
5478f9ba
PS		 1140 /*
1141 * No tcon so can't do
1142 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1143 */
eb4c7df6
SP		 1144
1145smb2_session_already_dead:
5478f9ba
PS		 1146 return rc;
1147}
faaf946a
PS		 1148
1149static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
1150{
d60622eb 1151 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
faaf946a
PS		 1152}
1153
1154#define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1155
de9f68df
SF		 1156/* These are similar values to what Windows uses */
1157static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
1158{
1159 tcon->max_chunks = 256;
1160 tcon->max_bytes_chunk = 1048576;
1161 tcon->max_bytes_copy = 16777216;
1162}
1163
faaf946a
PS		 1164int
1165SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
1166 struct cifs_tcon *tcon, const struct nls_table *cp)
1167{
1168 struct smb2_tree_connect_req *req;
1169 struct smb2_tree_connect_rsp *rsp = NULL;
1170 struct kvec iov[2];
da502f7d 1171 struct kvec rsp_iov;
faaf946a
PS		 1172 int rc = 0;
1173 int resp_buftype;
1174 int unc_path_len;
faaf946a 1175 __le16 *unc_path = NULL;
7fb8986e 1176 int flags = 0;
faaf946a 1177
f96637be 1178 cifs_dbg(FYI, "TCON\n");
faaf946a 1179
68a6afa7 1180 if (!(ses->server) || !tree)
faaf946a
PS		 1181 return -EIO;
1182
faaf946a
PS		 1183 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
1184 if (unc_path == NULL)
1185 return -ENOMEM;
1186
1187 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
1188 unc_path_len *= 2;
1189 if (unc_path_len < 2) {
1190 kfree(unc_path);
1191 return -EINVAL;
1192 }
1193
806a28ef
JMG		 1194 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
1195 if (tcon)
1196 tcon->tid = 0;
1197
faaf946a
PS		 1198 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
1199 if (rc) {
1200 kfree(unc_path);
1201 return rc;
1202 }
1203
1204 if (tcon == NULL) {
ae6f8dd4
PS		 1205 if ((ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA))
1206 flags |= CIFS_TRANSFORM_REQ;
1207
faaf946a 1208 /* since no tcon, smb2_init can not do this, so do here */
31473fc4 1209 req->hdr.sync_hdr.SessionId = ses->Suid;
b9043cc5
AA		 1210 if (ses->server->sign)
1211 req->hdr.sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
ae6f8dd4
PS		 1212 } else if (encryption_required(tcon))
1213 flags |= CIFS_TRANSFORM_REQ;
faaf946a
PS		 1214
1215 iov[0].iov_base = (char *)req;
1216 /* 4 for rfc1002 length field and 1 for pad */
1217 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1218
1219 /* Testing shows that buffer offset must be at location of Buffer[0] */
1220 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
1221 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
1222 req->PathLength = cpu_to_le16(unc_path_len - 2);
1223 iov[1].iov_base = unc_path;
1224 iov[1].iov_len = unc_path_len;
1225
1226 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
1227
7fb8986e 1228 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1229 cifs_small_buf_release(req);
1230 rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
faaf946a
PS		 1231
1232 if (rc != 0) {
1233 if (tcon) {
1234 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
1235 tcon->need_reconnect = true;
1236 }
1237 goto tcon_error_exit;
1238 }
1239
faaf946a 1240 if (tcon == NULL) {
31473fc4 1241 ses->ipc_tid = rsp->hdr.sync_hdr.TreeId;
faaf946a
PS		 1242 goto tcon_exit;
1243 }
1244
cd123007
CJ		 1245 switch (rsp->ShareType) {
1246 case SMB2_SHARE_TYPE_DISK:
f96637be 1247 cifs_dbg(FYI, "connection to disk share\n");
cd123007
CJ		 1248 break;
1249 case SMB2_SHARE_TYPE_PIPE:
faaf946a 1250 tcon->ipc = true;
f96637be 1251 cifs_dbg(FYI, "connection to pipe share\n");
cd123007
CJ		 1252 break;
1253 case SMB2_SHARE_TYPE_PRINT:
1254 tcon->ipc = true;
f96637be 1255 cifs_dbg(FYI, "connection to printer\n");
cd123007
CJ		 1256 break;
1257 default:
f96637be 1258 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
faaf946a
PS		 1259 rc = -EOPNOTSUPP;
1260 goto tcon_error_exit;
1261 }
1262
1263 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
769ee6a4 1264 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
faaf946a
PS		 1265 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1266 tcon->tidStatus = CifsGood;
1267 tcon->need_reconnect = false;
31473fc4 1268 tcon->tid = rsp->hdr.sync_hdr.TreeId;
46b51d08 1269 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
faaf946a
PS		 1270
1271 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1272 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
f96637be 1273 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
ae6f8dd4
PS		 1274
1275 if (tcon->seal &&
1276 !(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
1277 cifs_dbg(VFS, "Encryption is requested but not supported\n");
1278
de9f68df 1279 init_copy_chunk_defaults(tcon);
ff1c038a
SF		 1280 if (tcon->ses->server->ops->validate_negotiate)
1281 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
faaf946a
PS		 1282tcon_exit:
1283 free_rsp_buf(resp_buftype, rsp);
1284 kfree(unc_path);
1285 return rc;
1286
1287tcon_error_exit:
31473fc4 1288 if (rsp->hdr.sync_hdr.Status == STATUS_BAD_NETWORK_NAME) {
f96637be 1289 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
faaf946a
PS		 1290 }
1291 goto tcon_exit;
1292}
1293
1294int
1295SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1296{
1297 struct smb2_tree_disconnect_req *req; /* response is trivial */
1298 int rc = 0;
faaf946a 1299 struct cifs_ses *ses = tcon->ses;
7fb8986e 1300 int flags = 0;
faaf946a 1301
f96637be 1302 cifs_dbg(FYI, "Tree Disconnect\n");
faaf946a 1303
68a6afa7 1304 if (!ses || !(ses->server))
faaf946a
PS		 1305 return -EIO;
1306
1307 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1308 return 0;
1309
1310 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
1311 if (rc)
1312 return rc;
1313
7fb8986e
PS		 1314 if (encryption_required(tcon))
1315 flags |= CIFS_TRANSFORM_REQ;
1316
1317 rc = SendReceiveNoRsp(xid, ses, (char *)req, flags);
da502f7d 1318 cifs_small_buf_release(req);
faaf946a
PS		 1319 if (rc)
1320 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1321
1322 return rc;
1323}
2503a0db 1324
b8c32dbb 1325
63eb3def
PS		 1326static struct create_durable *
1327create_durable_buf(void)
1328{
1329 struct create_durable *buf;
1330
1331 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1332 if (!buf)
1333 return NULL;
1334
1335 buf->ccontext.DataOffset = cpu_to_le16(offsetof
9cbc0b73 1336 (struct create_durable, Data));
63eb3def
PS		 1337 buf->ccontext.DataLength = cpu_to_le32(16);
1338 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1339 (struct create_durable, Name));
1340 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 1341 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
63eb3def
PS		 1342 buf->Name[0] = 'D';
1343 buf->Name[1] = 'H';
1344 buf->Name[2] = 'n';
1345 buf->Name[3] = 'Q';
1346 return buf;
1347}
1348
9cbc0b73
PS		 1349static struct create_durable *
1350create_reconnect_durable_buf(struct cifs_fid *fid)
1351{
1352 struct create_durable *buf;
1353
1354 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1355 if (!buf)
1356 return NULL;
1357
1358 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1359 (struct create_durable, Data));
1360 buf->ccontext.DataLength = cpu_to_le32(16);
1361 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1362 (struct create_durable, Name));
1363 buf->ccontext.NameLength = cpu_to_le16(4);
1364 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1365 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
12197a7f 1366 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
9cbc0b73
PS		 1367 buf->Name[0] = 'D';
1368 buf->Name[1] = 'H';
1369 buf->Name[2] = 'n';
1370 buf->Name[3] = 'C';
1371 return buf;
1372}
1373
b8c32dbb 1374static __u8
42873b0a
PS		 1375parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
1376 unsigned int *epoch)
b8c32dbb
PS		 1377{
1378 char *data_offset;
b5c7cde3 1379 struct create_context *cc;
deb7deff
JM		 1380 unsigned int next;
1381 unsigned int remaining;
fd554396 1382 char *name;
b8c32dbb 1383
fd554396 1384 data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
deb7deff 1385 remaining = le32_to_cpu(rsp->CreateContextsLength);
b5c7cde3 1386 cc = (struct create_context *)data_offset;
deb7deff 1387 while (remaining >= sizeof(struct create_context)) {
b5c7cde3 1388 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
deb7deff
JM		 1389 if (le16_to_cpu(cc->NameLength) == 4 &&
1390 strncmp(name, "RqLs", 4) == 0)
1391 return server->ops->parse_lease_buf(cc, epoch);
1392
1393 next = le32_to_cpu(cc->Next);
1394 if (!next)
1395 break;
1396 remaining -= next;
1397 cc = (struct create_context *)((char *)cc + next);
1398 }
b8c32dbb 1399
b5c7cde3 1400 return 0;
b8c32dbb
PS		 1401}
1402
d22cbfec 1403static int
a41a28bd
PS		 1404add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1405 unsigned int *num_iovec, __u8 *oplock)
d22cbfec
PS		 1406{
1407 struct smb2_create_req *req = iov[0].iov_base;
1408 unsigned int num = *num_iovec;
1409
a41a28bd 1410 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
d22cbfec
PS		 1411 if (iov[num].iov_base == NULL)
1412 return -ENOMEM;
a41a28bd 1413 iov[num].iov_len = server->vals->create_lease_size;
d22cbfec
PS		 1414 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1415 if (!req->CreateContextsOffset)
1416 req->CreateContextsOffset = cpu_to_le32(
1417 sizeof(struct smb2_create_req) - 4 +
1418 iov[num - 1].iov_len);
a41a28bd
PS		 1419 le32_add_cpu(&req->CreateContextsLength,
1420 server->vals->create_lease_size);
1421 inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
d22cbfec
PS		 1422 *num_iovec = num + 1;
1423 return 0;
1424}
1425
b56eae4d
SF		 1426static struct create_durable_v2 *
1427create_durable_v2_buf(struct cifs_fid *pfid)
1428{
1429 struct create_durable_v2 *buf;
1430
1431 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
1432 if (!buf)
1433 return NULL;
1434
1435 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1436 (struct create_durable_v2, dcontext));
1437 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
1438 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1439 (struct create_durable_v2, Name));
1440 buf->ccontext.NameLength = cpu_to_le16(4);
1441
1442 buf->dcontext.Timeout = 0; /* Should this be configurable by workload */
1443 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
fa70b87c 1444 generate_random_uuid(buf->dcontext.CreateGuid);
b56eae4d
SF		 1445 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
1446
1447 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1448 buf->Name[0] = 'D';
1449 buf->Name[1] = 'H';
1450 buf->Name[2] = '2';
1451 buf->Name[3] = 'Q';
1452 return buf;
1453}
1454
1455static struct create_durable_handle_reconnect_v2 *
1456create_reconnect_durable_v2_buf(struct cifs_fid *fid)
1457{
1458 struct create_durable_handle_reconnect_v2 *buf;
1459
1460 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
1461 GFP_KERNEL);
1462 if (!buf)
1463 return NULL;
1464
1465 buf->ccontext.DataOffset =
1466 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1467 dcontext));
1468 buf->ccontext.DataLength =
1469 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
1470 buf->ccontext.NameOffset =
1471 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1472 Name));
1473 buf->ccontext.NameLength = cpu_to_le16(4);
1474
1475 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
1476 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
1477 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1478 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
1479
1480 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1481 buf->Name[0] = 'D';
1482 buf->Name[1] = 'H';
1483 buf->Name[2] = '2';
1484 buf->Name[3] = 'C';
1485 return buf;
1486}
1487
63eb3def 1488static int
b56eae4d
SF		 1489add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
1490 struct cifs_open_parms *oparms)
1491{
1492 struct smb2_create_req *req = iov[0].iov_base;
1493 unsigned int num = *num_iovec;
1494
1495 iov[num].iov_base = create_durable_v2_buf(oparms->fid);
1496 if (iov[num].iov_base == NULL)
1497 return -ENOMEM;
1498 iov[num].iov_len = sizeof(struct create_durable_v2);
1499 if (!req->CreateContextsOffset)
1500 req->CreateContextsOffset =
1501 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1502 iov[1].iov_len);
1503 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
1504 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable_v2));
1505 *num_iovec = num + 1;
1506 return 0;
1507}
1508
1509static int
1510add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
9cbc0b73 1511 struct cifs_open_parms *oparms)
63eb3def
PS		 1512{
1513 struct smb2_create_req *req = iov[0].iov_base;
1514 unsigned int num = *num_iovec;
1515
b56eae4d
SF		 1516 /* indicate that we don't need to relock the file */
1517 oparms->reconnect = false;
1518
1519 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
1520 if (iov[num].iov_base == NULL)
1521 return -ENOMEM;
1522 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
1523 if (!req->CreateContextsOffset)
1524 req->CreateContextsOffset =
1525 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1526 iov[1].iov_len);
1527 le32_add_cpu(&req->CreateContextsLength,
1528 sizeof(struct create_durable_handle_reconnect_v2));
1529 inc_rfc1001_len(&req->hdr,
1530 sizeof(struct create_durable_handle_reconnect_v2));
1531 *num_iovec = num + 1;
1532 return 0;
1533}
1534
1535static int
1536add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1537 struct cifs_open_parms *oparms, bool use_persistent)
1538{
1539 struct smb2_create_req *req = iov[0].iov_base;
1540 unsigned int num = *num_iovec;
1541
1542 if (use_persistent) {
1543 if (oparms->reconnect)
1544 return add_durable_reconnect_v2_context(iov, num_iovec,
1545 oparms);
1546 else
1547 return add_durable_v2_context(iov, num_iovec, oparms);
1548 }
1549
9cbc0b73
PS		 1550 if (oparms->reconnect) {
1551 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1552 /* indicate that we don't need to relock the file */
1553 oparms->reconnect = false;
1554 } else
1555 iov[num].iov_base = create_durable_buf();
63eb3def
PS		 1556 if (iov[num].iov_base == NULL)
1557 return -ENOMEM;
1558 iov[num].iov_len = sizeof(struct create_durable);
1559 if (!req->CreateContextsOffset)
1560 req->CreateContextsOffset =
1561 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1562 iov[1].iov_len);
31f92e9a 1563 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
63eb3def
PS		 1564 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
1565 *num_iovec = num + 1;
1566 return 0;
1567}
1568
f0712928
AA		 1569static int
1570alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
1571 const char *treename, const __le16 *path)
1572{
1573 int treename_len, path_len;
1574 struct nls_table *cp;
1575 const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
1576
1577 /*
1578 * skip leading "\\"
1579 */
1580 treename_len = strlen(treename);
1581 if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\'))
1582 return -EINVAL;
1583
1584 treename += 2;
1585 treename_len -= 2;
1586
1587 path_len = UniStrnlen((wchar_t *)path, PATH_MAX);
1588
1589 /*
1590 * make room for one path separator between the treename and
1591 * path
1592 */
1593 *out_len = treename_len + 1 + path_len;
1594
1595 /*
1596 * final path needs to be null-terminated UTF16 with a
1597 * size aligned to 8
1598 */
1599
1600 *out_size = roundup((*out_len+1)*2, 8);
1601 *out_path = kzalloc(*out_size, GFP_KERNEL);
1602 if (!*out_path)
1603 return -ENOMEM;
1604
1605 cp = load_nls_default();
1606 cifs_strtoUTF16(*out_path, treename, treename_len, cp);
1607 UniStrcat(*out_path, sep);
1608 UniStrcat(*out_path, path);
1609 unload_nls(cp);
1610
1611 return 0;
1612}
1613
2503a0db 1614int
064f6047 1615SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
b42bf888
PS		 1616 __u8 *oplock, struct smb2_file_all_info *buf,
1617 struct smb2_err_rsp **err_buf)
2503a0db
PS		 1618{
1619 struct smb2_create_req *req;
1620 struct smb2_create_rsp *rsp;
1621 struct TCP_Server_Info *server;
064f6047 1622 struct cifs_tcon *tcon = oparms->tcon;
2503a0db 1623 struct cifs_ses *ses = tcon->ses;
63eb3def 1624 struct kvec iov[4];
da502f7d 1625 struct kvec rsp_iov;
2503a0db
PS		 1626 int resp_buftype;
1627 int uni_path_len;
b8c32dbb
PS		 1628 __le16 *copy_path = NULL;
1629 int copy_size;
2503a0db 1630 int rc = 0;
da502f7d 1631 unsigned int n_iov = 2;
ca81983f 1632 __u32 file_attributes = 0;
663a9621 1633 char *dhc_buf = NULL, *lc_buf = NULL;
7fb8986e 1634 int flags = 0;
2503a0db 1635
f96637be 1636 cifs_dbg(FYI, "create/open\n");
2503a0db
PS		 1637
1638 if (ses && (ses->server))
1639 server = ses->server;
1640 else
1641 return -EIO;
1642
1643 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
1644 if (rc)
1645 return rc;
1646
7fb8986e
PS		 1647 if (encryption_required(tcon))
1648 flags |= CIFS_TRANSFORM_REQ;
1649
064f6047 1650 if (oparms->create_options & CREATE_OPTION_READONLY)
ca81983f 1651 file_attributes |= ATTR_READONLY;
db8b631d
SF		 1652 if (oparms->create_options & CREATE_OPTION_SPECIAL)
1653 file_attributes |= ATTR_SYSTEM;
ca81983f 1654
2503a0db 1655 req->ImpersonationLevel = IL_IMPERSONATION;
064f6047 1656 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
2503a0db
PS		 1657 /* File attributes ignored on open (used in create though) */
1658 req->FileAttributes = cpu_to_le32(file_attributes);
1659 req->ShareAccess = FILE_SHARE_ALL_LE;
064f6047
PS		 1660 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1661 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
2503a0db
PS		 1662
1663 iov[0].iov_base = (char *)req;
1664 /* 4 for rfc1002 length field */
1665 iov[0].iov_len = get_rfc1002_length(req) + 4;
59aa3718
PS		 1666 /* -1 since last byte is buf[0] which is sent below (path) */
1667 iov[0].iov_len--;
f0712928
AA		 1668
1669 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
1670
1671 /* [MS-SMB2] 2.2.13 NameOffset:
1672 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
1673 * the SMB2 header, the file name includes a prefix that will
1674 * be processed during DFS name normalization as specified in
1675 * section 3.3.5.9. Otherwise, the file name is relative to
1676 * the share that is identified by the TreeId in the SMB2
1677 * header.
1678 */
1679 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
1680 int name_len;
1681
1682 req->hdr.sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
1683 rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
1684 &name_len,
1685 tcon->treeName, path);
1686 if (rc)
1687 return rc;
1688 req->NameLength = cpu_to_le16(name_len * 2);
59aa3718
PS		 1689 uni_path_len = copy_size;
1690 path = copy_path;
f0712928
AA		 1691 } else {
1692 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
1693 /* MUST set path len (NameLength) to 0 opening root of share */
1694 req->NameLength = cpu_to_le16(uni_path_len - 2);
1695 if (uni_path_len % 8 != 0) {
1696 copy_size = roundup(uni_path_len, 8);
1697 copy_path = kzalloc(copy_size, GFP_KERNEL);
1698 if (!copy_path)
1699 return -ENOMEM;
1700 memcpy((char *)copy_path, (const char *)path,
1701 uni_path_len);
1702 uni_path_len = copy_size;
1703 path = copy_path;
1704 }
2503a0db
PS		 1705 }
1706
59aa3718
PS		 1707 iov[1].iov_len = uni_path_len;
1708 iov[1].iov_base = path;
1709 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1710 inc_rfc1001_len(req, uni_path_len - 1);
1711
b8c32dbb
PS		 1712 if (!server->oplocks)
1713 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1714
a41a28bd 1715 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
b8c32dbb
PS		 1716 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1717 req->RequestedOplockLevel = *oplock;
1718 else {
da502f7d 1719 rc = add_lease_context(server, iov, &n_iov, oplock);
d22cbfec 1720 if (rc) {
b8c32dbb
PS		 1721 cifs_small_buf_release(req);
1722 kfree(copy_path);
d22cbfec 1723 return rc;
b8c32dbb 1724 }
da502f7d 1725 lc_buf = iov[n_iov-1].iov_base;
b8c32dbb
PS		 1726 }
1727
63eb3def
PS		 1728 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1729 /* need to set Next field of lease context if we request it */
a41a28bd 1730 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
63eb3def 1731 struct create_context *ccontext =
da502f7d 1732 (struct create_context *)iov[n_iov-1].iov_base;
1c46943f 1733 ccontext->Next =
a41a28bd 1734 cpu_to_le32(server->vals->create_lease_size);
63eb3def 1735 }
b56eae4d 1736
da502f7d 1737 rc = add_durable_context(iov, &n_iov, oparms,
b56eae4d 1738 tcon->use_persistent);
63eb3def
PS		 1739 if (rc) {
1740 cifs_small_buf_release(req);
1741 kfree(copy_path);
663a9621 1742 kfree(lc_buf);
63eb3def
PS		 1743 return rc;
1744 }
da502f7d 1745 dhc_buf = iov[n_iov-1].iov_base;
63eb3def
PS		 1746 }
1747
7fb8986e 1748 rc = SendReceive2(xid, ses, iov, n_iov, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1749 cifs_small_buf_release(req);
1750 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2503a0db
PS		 1751
1752 if (rc != 0) {
1753 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
b42bf888
PS		 1754 if (err_buf)
1755 *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
1756 GFP_KERNEL);
2503a0db
PS		 1757 goto creat_exit;
1758 }
1759
064f6047
PS		 1760 oparms->fid->persistent_fid = rsp->PersistentFileId;
1761 oparms->fid->volatile_fid = rsp->VolatileFileId;
f0df737e
PS		 1762
1763 if (buf) {
1764 memcpy(buf, &rsp->CreationTime, 32);
1765 buf->AllocationSize = rsp->AllocationSize;
1766 buf->EndOfFile = rsp->EndofFile;
1767 buf->Attributes = rsp->FileAttributes;
1768 buf->NumberOfLinks = cpu_to_le32(1);
1769 buf->DeletePending = 0;
1770 }
2e44b288 1771
b8c32dbb 1772 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
42873b0a 1773 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
b8c32dbb
PS		 1774 else
1775 *oplock = rsp->OplockLevel;
2503a0db 1776creat_exit:
b8c32dbb 1777 kfree(copy_path);
663a9621
PS		 1778 kfree(lc_buf);
1779 kfree(dhc_buf);
2503a0db
PS		 1780 free_rsp_buf(resp_buftype, rsp);
1781 return rc;
1782}
1783
4a72dafa
SF		 1784/*
1785 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1786 */
1787int
1788SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
51146625
AA		 1789 u64 volatile_fid, u32 opcode, bool is_fsctl, bool use_ipc,
1790 char *in_data, u32 indatalen,
1791 char **out_data, u32 *plen /* returned data len */)
4a72dafa
SF		 1792{
1793 struct smb2_ioctl_req *req;
1794 struct smb2_ioctl_rsp *rsp;
31473fc4 1795 struct smb2_sync_hdr *shdr;
8e353106 1796 struct cifs_ses *ses;
4a72dafa 1797 struct kvec iov[2];
da502f7d 1798 struct kvec rsp_iov;
4a72dafa 1799 int resp_buftype;
da502f7d 1800 int n_iov;
4a72dafa 1801 int rc = 0;
7fb8986e 1802 int flags = 0;
4a72dafa
SF		 1803
1804 cifs_dbg(FYI, "SMB2 IOCTL\n");
1805
3d1a3745
SF		 1806 if (out_data != NULL)
1807 *out_data = NULL;
1808
4a72dafa
SF		 1809 /* zero out returned data len, in case of error */
1810 if (plen)
1811 *plen = 0;
1812
8e353106
SF		 1813 if (tcon)
1814 ses = tcon->ses;
1815 else
1816 return -EIO;
1817
68a6afa7 1818 if (!ses || !(ses->server))
4a72dafa
SF		 1819 return -EIO;
1820
1821 rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req);
1822 if (rc)
1823 return rc;
1824
51146625
AA		 1825 if (use_ipc) {
1826 if (ses->ipc_tid == 0) {
1827 cifs_small_buf_release(req);
1828 return -ENOTCONN;
1829 }
1830
1831 cifs_dbg(FYI, "replacing tid 0x%x with IPC tid 0x%x\n",
1832 req->hdr.sync_hdr.TreeId, ses->ipc_tid);
1833 req->hdr.sync_hdr.TreeId = ses->ipc_tid;
1834 }
7fb8986e
PS		 1835 if (encryption_required(tcon))
1836 flags |= CIFS_TRANSFORM_REQ;
1837
4a72dafa
SF		 1838 req->CtlCode = cpu_to_le32(opcode);
1839 req->PersistentFileId = persistent_fid;
1840 req->VolatileFileId = volatile_fid;
1841
1842 if (indatalen) {
1843 req->InputCount = cpu_to_le32(indatalen);
1844 /* do not set InputOffset if no input data */
1845 req->InputOffset =
1846 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4);
1847 iov[1].iov_base = in_data;
1848 iov[1].iov_len = indatalen;
da502f7d 1849 n_iov = 2;
4a72dafa 1850 } else
da502f7d 1851 n_iov = 1;
4a72dafa
SF		 1852
1853 req->OutputOffset = 0;
1854 req->OutputCount = 0; /* MBZ */
1855
1856 /*
1857 * Could increase MaxOutputResponse, but that would require more
1858 * than one credit. Windows typically sets this smaller, but for some
1859 * ioctls it may be useful to allow server to send more. No point
1860 * limiting what the server can send as long as fits in one credit
7db0a6ef
SF		 1861 * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE
1862 * (by default, note that it can be overridden to make max larger)
1863 * in responses (except for read responses which can be bigger.
1864 * We may want to bump this limit up
4a72dafa 1865 */
7db0a6ef 1866 req->MaxOutputResponse = cpu_to_le32(CIFSMaxBufSize);
4a72dafa
SF		 1867
1868 if (is_fsctl)
1869 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
1870 else
1871 req->Flags = 0;
1872
1873 iov[0].iov_base = (char *)req;
4a72dafa 1874
7ff8d45c
SF		 1875 /*
1876 * If no input data, the size of ioctl struct in
1877 * protocol spec still includes a 1 byte data buffer,
1878 * but if input data passed to ioctl, we do not
1879 * want to double count this, so we do not send
1880 * the dummy one byte of data in iovec[0] if sending
1881 * input data (in iovec[1]). We also must add 4 bytes
1882 * in first iovec to allow for rfc1002 length field.
1883 */
1884
1885 if (indatalen) {
1886 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1887 inc_rfc1001_len(req, indatalen - 1);
1888 } else
1889 iov[0].iov_len = get_rfc1002_length(req) + 4;
1890
4a72dafa 1891
7fb8986e 1892 rc = SendReceive2(xid, ses, iov, n_iov, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1893 cifs_small_buf_release(req);
1894 rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
4a72dafa 1895
9bf0c9cd 1896 if ((rc != 0) && (rc != -EINVAL)) {
8e353106 1897 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
4a72dafa 1898 goto ioctl_exit;
9bf0c9cd
SF		 1899 } else if (rc == -EINVAL) {
1900 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
1901 (opcode != FSCTL_SRV_COPYCHUNK)) {
8e353106 1902 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
9bf0c9cd
SF		 1903 goto ioctl_exit;
1904 }
4a72dafa
SF		 1905 }
1906
1907 /* check if caller wants to look at return data or just return rc */
1908 if ((plen == NULL) || (out_data == NULL))
1909 goto ioctl_exit;
1910
1911 *plen = le32_to_cpu(rsp->OutputCount);
1912
1913 /* We check for obvious errors in the output buffer length and offset */
1914 if (*plen == 0)
1915 goto ioctl_exit; /* server returned no data */
1916 else if (*plen > 0xFF00) {
1917 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
1918 *plen = 0;
1919 rc = -EIO;
1920 goto ioctl_exit;
1921 }
1922
1923 if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
1924 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
1925 le32_to_cpu(rsp->OutputOffset));
1926 *plen = 0;
1927 rc = -EIO;
1928 goto ioctl_exit;
1929 }
1930
1931 *out_data = kmalloc(*plen, GFP_KERNEL);
1932 if (*out_data == NULL) {
1933 rc = -ENOMEM;
1934 goto ioctl_exit;
1935 }
1936
31473fc4
PS		 1937 shdr = get_sync_hdr(rsp);
1938 memcpy(*out_data, (char *)shdr + le32_to_cpu(rsp->OutputOffset), *plen);
4a72dafa
SF		 1939ioctl_exit:
1940 free_rsp_buf(resp_buftype, rsp);
1941 return rc;
1942}
1943
64a5cfa6
SF		 1944/*
1945 * Individual callers to ioctl worker function follow
1946 */
1947
1948int
1949SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1950 u64 persistent_fid, u64 volatile_fid)
1951{
1952 int rc;
64a5cfa6
SF		 1953 struct compress_ioctl fsctl_input;
1954 char *ret_data = NULL;
1955
1956 fsctl_input.CompressionState =
bc09d141 1957 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
64a5cfa6
SF		 1958
1959 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1960 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
51146625 1961 false /* use_ipc */,
64a5cfa6
SF		 1962 (char *)&fsctl_input /* data input */,
1963 2 /* in data len */, &ret_data /* out data */, NULL);
1964
1965 cifs_dbg(FYI, "set compression rc %d\n", rc);
64a5cfa6
SF		 1966
1967 return rc;
1968}
1969
2503a0db
PS		 1970int
1971SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1972 u64 persistent_fid, u64 volatile_fid)
1973{
1974 struct smb2_close_req *req;
1975 struct smb2_close_rsp *rsp;
2503a0db
PS		 1976 struct cifs_ses *ses = tcon->ses;
1977 struct kvec iov[1];
da502f7d 1978 struct kvec rsp_iov;
2503a0db
PS		 1979 int resp_buftype;
1980 int rc = 0;
7fb8986e 1981 int flags = 0;
2503a0db 1982
f96637be 1983 cifs_dbg(FYI, "Close\n");
2503a0db 1984
68a6afa7 1985 if (!ses || !(ses->server))
2503a0db
PS		 1986 return -EIO;
1987
1988 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1989 if (rc)
1990 return rc;
1991
7fb8986e
PS		 1992 if (encryption_required(tcon))
1993 flags |= CIFS_TRANSFORM_REQ;
1994
2503a0db
PS		 1995 req->PersistentFileId = persistent_fid;
1996 req->VolatileFileId = volatile_fid;
1997
1998 iov[0].iov_base = (char *)req;
1999 /* 4 for rfc1002 length field */
2000 iov[0].iov_len = get_rfc1002_length(req) + 4;
2001
7fb8986e 2002 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2003 cifs_small_buf_release(req);
2004 rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
2503a0db
PS		 2005
2006 if (rc != 0) {
d4a029d2 2007 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
2503a0db
PS		 2008 goto close_exit;
2009 }
2010
2503a0db
PS		 2011 /* BB FIXME - decode close response, update inode for caching */
2012
2013close_exit:
2014 free_rsp_buf(resp_buftype, rsp);
2015 return rc;
2016}
be4cb9e3
PS		 2017
2018static int
2019validate_buf(unsigned int offset, unsigned int buffer_length,
2020 struct smb2_hdr *hdr, unsigned int min_buf_size)
2021
2022{
2023 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
2024 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
2025 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
2026 char *end_of_buf = begin_of_buf + buffer_length;
2027
2028
2029 if (buffer_length < min_buf_size) {
f96637be
JP		 2030 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
2031 buffer_length, min_buf_size);
be4cb9e3
PS		 2032 return -EINVAL;
2033 }
2034
2035 /* check if beyond RFC1001 maximum length */
2036 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
f96637be
JP		 2037 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
2038 buffer_length, smb_len);
be4cb9e3
PS		 2039 return -EINVAL;
2040 }
2041
2042 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
f96637be 2043 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
be4cb9e3
PS		 2044 return -EINVAL;
2045 }
2046
2047 return 0;
2048}
2049
2050/*
2051 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2052 * Caller must free buffer.
2053 */
2054static int
2055validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
2056 struct smb2_hdr *hdr, unsigned int minbufsize,
2057 char *data)
2058
2059{
2060 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
2061 int rc;
2062
2063 if (!data)
2064 return -EINVAL;
2065
2066 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
2067 if (rc)
2068 return rc;
2069
2070 memcpy(data, begin_of_buf, buffer_length);
2071
2072 return 0;
2073}
2074
f0df737e
PS		 2075static int
2076query_info(const unsigned int xid, struct cifs_tcon *tcon,
42c493c1
SP		 2077 u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
2078 u32 additional_info, size_t output_len, size_t min_len, void **data,
2079 u32 *dlen)
be4cb9e3
PS		 2080{
2081 struct smb2_query_info_req *req;
2082 struct smb2_query_info_rsp *rsp = NULL;
2083 struct kvec iov[2];
da502f7d 2084 struct kvec rsp_iov;
be4cb9e3
PS		 2085 int rc = 0;
2086 int resp_buftype;
be4cb9e3 2087 struct cifs_ses *ses = tcon->ses;
7fb8986e 2088 int flags = 0;
be4cb9e3 2089
f96637be 2090 cifs_dbg(FYI, "Query Info\n");
be4cb9e3 2091
68a6afa7 2092 if (!ses || !(ses->server))
be4cb9e3
PS		 2093 return -EIO;
2094
2095 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2096 if (rc)
2097 return rc;
2098
7fb8986e
PS		 2099 if (encryption_required(tcon))
2100 flags |= CIFS_TRANSFORM_REQ;
2101
42c493c1 2102 req->InfoType = info_type;
f0df737e 2103 req->FileInfoClass = info_class;
be4cb9e3
PS		 2104 req->PersistentFileId = persistent_fid;
2105 req->VolatileFileId = volatile_fid;
42c493c1 2106 req->AdditionalInformation = cpu_to_le32(additional_info);
be4cb9e3
PS		 2107 /* 4 for rfc1002 length field and 1 for Buffer */
2108 req->InputBufferOffset =
2109 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
f0df737e 2110 req->OutputBufferLength = cpu_to_le32(output_len);
be4cb9e3
PS		 2111
2112 iov[0].iov_base = (char *)req;
2113 /* 4 for rfc1002 length field */
2114 iov[0].iov_len = get_rfc1002_length(req) + 4;
2115
7fb8986e 2116 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2117 cifs_small_buf_release(req);
2118 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
e5d04887 2119
be4cb9e3
PS		 2120 if (rc) {
2121 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2122 goto qinf_exit;
2123 }
2124
42c493c1
SP		 2125 if (dlen) {
2126 *dlen = le32_to_cpu(rsp->OutputBufferLength);
2127 if (!*data) {
2128 *data = kmalloc(*dlen, GFP_KERNEL);
2129 if (!*data) {
2130 cifs_dbg(VFS,
2131 "Error %d allocating memory for acl\n",
2132 rc);
2133 *dlen = 0;
2134 goto qinf_exit;
2135 }
2136 }
2137 }
2138
be4cb9e3
PS		 2139 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
2140 le32_to_cpu(rsp->OutputBufferLength),
42c493c1 2141 &rsp->hdr, min_len, *data);
be4cb9e3
PS		 2142
2143qinf_exit:
2144 free_rsp_buf(resp_buftype, rsp);
2145 return rc;
2146}
9094fad1 2147
42c493c1
SP		 2148int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
2149 u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data)
2150{
2151 return query_info(xid, tcon, persistent_fid, volatile_fid,
2152 FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0,
2153 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
2154 sizeof(struct smb2_file_all_info), (void **)&data,
2155 NULL);
2156}
2157
f0df737e 2158int
42c493c1 2159SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
f0df737e 2160 u64 persistent_fid, u64 volatile_fid,
42c493c1 2161 void **data, u32 *plen)
f0df737e 2162{
42c493c1
SP		 2163 __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO;
2164 *plen = 0;
2165
f0df737e 2166 return query_info(xid, tcon, persistent_fid, volatile_fid,
42c493c1
SP		 2167 0, SMB2_O_INFO_SECURITY, additional_info,
2168 SMB2_MAX_BUFFER_SIZE,
2169 sizeof(struct smb2_file_all_info), data, plen);
f0df737e
PS		 2170}
2171
2172int
2173SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
2174 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
2175{
2176 return query_info(xid, tcon, persistent_fid, volatile_fid,
42c493c1
SP		 2177 FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0,
2178 sizeof(struct smb2_file_internal_info),
f0df737e 2179 sizeof(struct smb2_file_internal_info),
42c493c1 2180 (void **)&uniqueid, NULL);
f0df737e
PS		 2181}
2182
9094fad1
PS		 2183/*
2184 * This is a no-op for now. We're not really interested in the reply, but
2185 * rather in the fact that the server sent one and that server->lstrp
2186 * gets updated.
2187 *
2188 * FIXME: maybe we should consider checking that the reply matches request?
2189 */
2190static void
2191smb2_echo_callback(struct mid_q_entry *mid)
2192{
2193 struct TCP_Server_Info *server = mid->callback_data;
31473fc4 2194 struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
9094fad1
PS		 2195 unsigned int credits_received = 1;
2196
2197 if (mid->mid_state == MID_RESPONSE_RECEIVED)
31473fc4 2198 credits_received = le16_to_cpu(rsp->hdr.sync_hdr.CreditRequest);
9094fad1
PS		 2199
2200 DeleteMidQEntry(mid);
2201 add_credits(server, credits_received, CIFS_ECHO_OP);
2202}
2203
53e0e11e
PS		 2204void smb2_reconnect_server(struct work_struct *work)
2205{
2206 struct TCP_Server_Info *server = container_of(work,
2207 struct TCP_Server_Info, reconnect.work);
2208 struct cifs_ses *ses;
2209 struct cifs_tcon *tcon, *tcon2;
2210 struct list_head tmp_list;
2211 int tcon_exist = false;
18ea4311
GP		 2212 int rc;
2213 int resched = false;
2214
53e0e11e
PS		 2215
2216 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2217 mutex_lock(&server->reconnect_mutex);
2218
2219 INIT_LIST_HEAD(&tmp_list);
2220 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
2221
2222 spin_lock(&cifs_tcp_ses_lock);
2223 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2224 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
96a988ff 2225 if (tcon->need_reconnect || tcon->need_reopen_files) {
53e0e11e
PS		 2226 tcon->tc_count++;
2227 list_add_tail(&tcon->rlist, &tmp_list);
2228 tcon_exist = true;
2229 }
2230 }
2231 }
2232 /*
2233 * Get the reference to server struct to be sure that the last call of
2234 * cifs_put_tcon() in the loop below won't release the server pointer.
2235 */
2236 if (tcon_exist)
2237 server->srv_count++;
2238
2239 spin_unlock(&cifs_tcp_ses_lock);
2240
2241 list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
18ea4311
GP		 2242 rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon);
2243 if (!rc)
96a988ff 2244 cifs_reopen_persistent_handles(tcon);
18ea4311
GP		 2245 else
2246 resched = true;
53e0e11e
PS		 2247 list_del_init(&tcon->rlist);
2248 cifs_put_tcon(tcon);
2249 }
2250
2251 cifs_dbg(FYI, "Reconnecting tcons finished\n");
18ea4311
GP		 2252 if (resched)
2253 queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
53e0e11e
PS		 2254 mutex_unlock(&server->reconnect_mutex);
2255
2256 /* now we can safely release srv struct */
2257 if (tcon_exist)
2258 cifs_put_tcp_session(server, 1);
2259}
2260
9094fad1
PS		 2261int
2262SMB2_echo(struct TCP_Server_Info *server)
2263{
2264 struct smb2_echo_req *req;
2265 int rc = 0;
738f9de5
PS		 2266 struct kvec iov[2];
2267 struct smb_rqst rqst = { .rq_iov = iov,
2268 .rq_nvec = 2 };
9094fad1 2269
f96637be 2270 cifs_dbg(FYI, "In echo request\n");
9094fad1 2271
4fcd1813 2272 if (server->tcpStatus == CifsNeedNegotiate) {
53e0e11e
PS		 2273 /* No need to send echo on newly established connections */
2274 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
2275 return rc;
4fcd1813
SF		 2276 }
2277
9094fad1
PS		 2278 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
2279 if (rc)
2280 return rc;
2281
31473fc4 2282 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
9094fad1 2283
9094fad1 2284 /* 4 for rfc1002 length field */
738f9de5
PS		 2285 iov[0].iov_len = 4;
2286 iov[0].iov_base = (char *)req;
2287 iov[1].iov_len = get_rfc1002_length(req);
2288 iov[1].iov_base = (char *)req + 4;
9094fad1 2289
9b7c18a2
PS		 2290 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
2291 server, CIFS_ECHO_OP);
9094fad1 2292 if (rc)
f96637be 2293 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
9094fad1
PS		 2294
2295 cifs_small_buf_release(req);
2296 return rc;
2297}
7a5cfb19
PS		 2298
2299int
2300SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2301 u64 volatile_fid)
2302{
2303 struct smb2_flush_req *req;
7a5cfb19
PS		 2304 struct cifs_ses *ses = tcon->ses;
2305 struct kvec iov[1];
da502f7d 2306 struct kvec rsp_iov;
7a5cfb19
PS		 2307 int resp_buftype;
2308 int rc = 0;
7fb8986e 2309 int flags = 0;
7a5cfb19 2310
f96637be 2311 cifs_dbg(FYI, "Flush\n");
7a5cfb19 2312
68a6afa7 2313 if (!ses || !(ses->server))
7a5cfb19
PS		 2314 return -EIO;
2315
2316 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
2317 if (rc)
2318 return rc;
2319
7fb8986e
PS		 2320 if (encryption_required(tcon))
2321 flags |= CIFS_TRANSFORM_REQ;
2322
7a5cfb19
PS		 2323 req->PersistentFileId = persistent_fid;
2324 req->VolatileFileId = volatile_fid;
2325
2326 iov[0].iov_base = (char *)req;
2327 /* 4 for rfc1002 length field */
2328 iov[0].iov_len = get_rfc1002_length(req) + 4;
2329
7fb8986e 2330 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d 2331 cifs_small_buf_release(req);
7a5cfb19 2332
dfebe400 2333 if (rc != 0)
7a5cfb19
PS		 2334 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
2335
da502f7d 2336 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
7a5cfb19
PS		 2337 return rc;
2338}
09a4707e
PS		 2339
2340/*
2341 * To form a chain of read requests, any read requests after the first should
2342 * have the end_of_chain boolean set to true.
2343 */
2344static int
738f9de5
PS		 2345smb2_new_read_req(void **buf, unsigned int *total_len,
2346 struct cifs_io_parms *io_parms, unsigned int remaining_bytes,
2347 int request_type)
09a4707e
PS		 2348{
2349 int rc = -EACCES;
b8f57ee8 2350 struct smb2_read_plain_req *req = NULL;
31473fc4 2351 struct smb2_sync_hdr *shdr;
09a4707e 2352
b8f57ee8
PS		 2353 rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
2354 total_len);
09a4707e
PS		 2355 if (rc)
2356 return rc;
2357 if (io_parms->tcon->ses->server == NULL)
2358 return -ECONNABORTED;
2359
b8f57ee8 2360 shdr = &req->sync_hdr;
31473fc4 2361 shdr->ProcessId = cpu_to_le32(io_parms->pid);
09a4707e
PS		 2362
2363 req->PersistentFileId = io_parms->persistent_fid;
2364 req->VolatileFileId = io_parms->volatile_fid;
2365 req->ReadChannelInfoOffset = 0; /* reserved */
2366 req->ReadChannelInfoLength = 0; /* reserved */
2367 req->Channel = 0; /* reserved */
2368 req->MinimumCount = 0;
2369 req->Length = cpu_to_le32(io_parms->length);
2370 req->Offset = cpu_to_le64(io_parms->offset);
2371
2372 if (request_type & CHAINED_REQUEST) {
2373 if (!(request_type & END_OF_CHAIN)) {
b8f57ee8
PS		 2374 /* next 8-byte aligned request */
2375 *total_len = DIV_ROUND_UP(*total_len, 8) * 8;
2376 shdr->NextCommand = cpu_to_le32(*total_len);
09a4707e 2377 } else /* END_OF_CHAIN */
31473fc4 2378 shdr->NextCommand = 0;
09a4707e 2379 if (request_type & RELATED_REQUEST) {
31473fc4 2380 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
09a4707e
PS		 2381 /*
2382 * Related requests use info from previous read request
2383 * in chain.
2384 */
31473fc4
PS		 2385 shdr->SessionId = 0xFFFFFFFF;
2386 shdr->TreeId = 0xFFFFFFFF;
09a4707e
PS		 2387 req->PersistentFileId = 0xFFFFFFFF;
2388 req->VolatileFileId = 0xFFFFFFFF;
2389 }
2390 }
2391 if (remaining_bytes > io_parms->length)
2392 req->RemainingBytes = cpu_to_le32(remaining_bytes);
2393 else
2394 req->RemainingBytes = 0;
2395
738f9de5 2396 *buf = req;
09a4707e
PS		 2397 return rc;
2398}
2399
2400static void
2401smb2_readv_callback(struct mid_q_entry *mid)
2402{
2403 struct cifs_readdata *rdata = mid->callback_data;
2404 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
2405 struct TCP_Server_Info *server = tcon->ses->server;
738f9de5
PS		 2406 struct smb2_sync_hdr *shdr =
2407 (struct smb2_sync_hdr *)rdata->iov[1].iov_base;
09a4707e 2408 unsigned int credits_received = 1;
738f9de5
PS		 2409 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2410 .rq_nvec = 2,
8321fec4
JL		 2411 .rq_pages = rdata->pages,
2412 .rq_npages = rdata->nr_pages,
2413 .rq_pagesz = rdata->pagesz,
2414 .rq_tailsz = rdata->tailsz };
09a4707e 2415
f96637be
JP		 2416 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2417 __func__, mid->mid, mid->mid_state, rdata->result,
2418 rdata->bytes);
09a4707e
PS		 2419
2420 switch (mid->mid_state) {
2421 case MID_RESPONSE_RECEIVED:
31473fc4 2422 credits_received = le16_to_cpu(shdr->CreditRequest);
09a4707e 2423 /* result already set, check signature */
4326ed2f 2424 if (server->sign && !mid->decrypted) {
3c1bf7e4
PS		 2425 int rc;
2426
0b688cfc 2427 rc = smb2_verify_signature(&rqst, server);
3c1bf7e4 2428 if (rc)
f96637be
JP		 2429 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
2430 rc);
3c1bf7e4 2431 }
09a4707e 2432 /* FIXME: should this be counted toward the initiating task? */
34a54d61
PS		 2433 task_io_account_read(rdata->got_bytes);
2434 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 2435 break;
2436 case MID_REQUEST_SUBMITTED:
2437 case MID_RETRY_NEEDED:
2438 rdata->result = -EAGAIN;
d913ed17
PS		 2439 if (server->sign && rdata->got_bytes)
2440 /* reset bytes number since we can not check a sign */
2441 rdata->got_bytes = 0;
2442 /* FIXME: should this be counted toward the initiating task? */
2443 task_io_account_read(rdata->got_bytes);
2444 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 2445 break;
2446 default:
2447 if (rdata->result != -ENODATA)
2448 rdata->result = -EIO;
2449 }
2450
2451 if (rdata->result)
2452 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
2453
2454 queue_work(cifsiod_wq, &rdata->work);
2455 DeleteMidQEntry(mid);
2456 add_credits(server, credits_received, 0);
2457}
2458
738f9de5 2459/* smb2_async_readv - send an async read, and set up mid to handle result */
09a4707e
PS		 2460int
2461smb2_async_readv(struct cifs_readdata *rdata)
2462{
bed9da02 2463 int rc, flags = 0;
31473fc4
PS		 2464 char *buf;
2465 struct smb2_sync_hdr *shdr;
09a4707e 2466 struct cifs_io_parms io_parms;
738f9de5
PS		 2467 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2468 .rq_nvec = 2 };
bed9da02 2469 struct TCP_Server_Info *server;
738f9de5 2470 unsigned int total_len;
b8f57ee8 2471 __be32 req_len;
09a4707e 2472
f96637be
JP		 2473 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
2474 __func__, rdata->offset, rdata->bytes);
09a4707e
PS		 2475
2476 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
2477 io_parms.offset = rdata->offset;
2478 io_parms.length = rdata->bytes;
2479 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
2480 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
2481 io_parms.pid = rdata->pid;
bed9da02
PS		 2482
2483 server = io_parms.tcon->ses->server;
2484
738f9de5 2485 rc = smb2_new_read_req((void **) &buf, &total_len, &io_parms, 0, 0);
bed9da02
PS		 2486 if (rc) {
2487 if (rc == -EAGAIN && rdata->credits) {
2488 /* credits was reset by reconnect */
2489 rdata->credits = 0;
2490 /* reduce in_flight value since we won't send the req */
2491 spin_lock(&server->req_lock);
2492 server->in_flight--;
2493 spin_unlock(&server->req_lock);
2494 }
09a4707e 2495 return rc;
bed9da02 2496 }
09a4707e 2497
7fb8986e
PS		 2498 if (encryption_required(io_parms.tcon))
2499 flags |= CIFS_TRANSFORM_REQ;
2500
b8f57ee8
PS		 2501 req_len = cpu_to_be32(total_len);
2502
2503 rdata->iov[0].iov_base = &req_len;
2504 rdata->iov[0].iov_len = sizeof(__be32);
2505 rdata->iov[1].iov_base = buf;
2506 rdata->iov[1].iov_len = total_len;
2507
2508 shdr = (struct smb2_sync_hdr *)buf;
09a4707e 2509
bed9da02 2510 if (rdata->credits) {
31473fc4 2511 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
bed9da02 2512 SMB2_MAX_BUFFER_SIZE));
31473fc4 2513 shdr->CreditRequest = shdr->CreditCharge;
bed9da02
PS		 2514 spin_lock(&server->req_lock);
2515 server->credits += rdata->credits -
31473fc4 2516 le16_to_cpu(shdr->CreditCharge);
bed9da02
PS		 2517 spin_unlock(&server->req_lock);
2518 wake_up(&server->request_q);
7fb8986e 2519 flags |= CIFS_HAS_CREDITS;
bed9da02
PS		 2520 }
2521
09a4707e 2522 kref_get(&rdata->refcount);
fec344e3 2523 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
09a4707e 2524 cifs_readv_receive, smb2_readv_callback,
4326ed2f 2525 smb3_handle_read_data, rdata, flags);
e5d04887 2526 if (rc) {
09a4707e 2527 kref_put(&rdata->refcount, cifs_readdata_release);
e5d04887
PS		 2528 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
2529 }
09a4707e
PS		 2530
2531 cifs_small_buf_release(buf);
2532 return rc;
2533}
33319141 2534
d8e05039
PS		 2535int
2536SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
2537 unsigned int *nbytes, char **buf, int *buf_type)
2538{
2539 int resp_buftype, rc = -EACCES;
b8f57ee8 2540 struct smb2_read_plain_req *req = NULL;
d8e05039 2541 struct smb2_read_rsp *rsp = NULL;
31473fc4 2542 struct smb2_sync_hdr *shdr;
b8f57ee8 2543 struct kvec iov[2];
da502f7d 2544 struct kvec rsp_iov;
738f9de5 2545 unsigned int total_len;
b8f57ee8
PS		 2546 __be32 req_len;
2547 struct smb_rqst rqst = { .rq_iov = iov,
2548 .rq_nvec = 2 };
7fb8986e
PS		 2549 int flags = CIFS_LOG_ERROR;
2550 struct cifs_ses *ses = io_parms->tcon->ses;
d8e05039
PS		 2551
2552 *nbytes = 0;
738f9de5 2553 rc = smb2_new_read_req((void **)&req, &total_len, io_parms, 0, 0);
d8e05039
PS		 2554 if (rc)
2555 return rc;
2556
7fb8986e
PS		 2557 if (encryption_required(io_parms->tcon))
2558 flags |= CIFS_TRANSFORM_REQ;
2559
b8f57ee8 2560 req_len = cpu_to_be32(total_len);
738f9de5 2561
b8f57ee8
PS		 2562 iov[0].iov_base = &req_len;
2563 iov[0].iov_len = sizeof(__be32);
2564 iov[1].iov_base = req;
2565 iov[1].iov_len = total_len;
2566
7fb8986e 2567 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
b8f57ee8 2568 cifs_small_buf_release(req);
d8e05039 2569
da502f7d 2570 rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
31473fc4 2571 shdr = get_sync_hdr(rsp);
d8e05039 2572
31473fc4 2573 if (shdr->Status == STATUS_END_OF_FILE) {
da502f7d 2574 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
d8e05039
PS		 2575 return 0;
2576 }
2577
2578 if (rc) {
2579 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
f96637be 2580 cifs_dbg(VFS, "Send error in read = %d\n", rc);
d8e05039
PS		 2581 } else {
2582 *nbytes = le32_to_cpu(rsp->DataLength);
2583 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
2584 (*nbytes > io_parms->length)) {
f96637be
JP		 2585 cifs_dbg(FYI, "bad length %d for count %d\n",
2586 *nbytes, io_parms->length);
d8e05039
PS		 2587 rc = -EIO;
2588 *nbytes = 0;
2589 }
2590 }
2591
2592 if (*buf) {
31473fc4 2593 memcpy(*buf, (char *)shdr + rsp->DataOffset, *nbytes);
da502f7d 2594 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
d8e05039 2595 } else if (resp_buftype != CIFS_NO_BUFFER) {
da502f7d 2596 *buf = rsp_iov.iov_base;
d8e05039
PS		 2597 if (resp_buftype == CIFS_SMALL_BUFFER)
2598 *buf_type = CIFS_SMALL_BUFFER;
2599 else if (resp_buftype == CIFS_LARGE_BUFFER)
2600 *buf_type = CIFS_LARGE_BUFFER;
2601 }
2602 return rc;
2603}
2604
33319141
PS		 2605/*
2606 * Check the mid_state and signature on received buffer (if any), and queue the
2607 * workqueue completion task.
2608 */
2609static void
2610smb2_writev_callback(struct mid_q_entry *mid)
2611{
2612 struct cifs_writedata *wdata = mid->callback_data;
2613 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
2614 unsigned int written;
2615 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
2616 unsigned int credits_received = 1;
2617
2618 switch (mid->mid_state) {
2619 case MID_RESPONSE_RECEIVED:
31473fc4 2620 credits_received = le16_to_cpu(rsp->hdr.sync_hdr.CreditRequest);
33319141
PS		 2621 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
2622 if (wdata->result != 0)
2623 break;
2624
2625 written = le32_to_cpu(rsp->DataLength);
2626 /*
2627 * Mask off high 16 bits when bytes written as returned
2628 * by the server is greater than bytes requested by the
2629 * client. OS/2 servers are known to set incorrect
2630 * CountHigh values.
2631 */
2632 if (written > wdata->bytes)
2633 written &= 0xFFFF;
2634
2635 if (written < wdata->bytes)
2636 wdata->result = -ENOSPC;
2637 else
2638 wdata->bytes = written;
2639 break;
2640 case MID_REQUEST_SUBMITTED:
2641 case MID_RETRY_NEEDED:
2642 wdata->result = -EAGAIN;
2643 break;
2644 default:
2645 wdata->result = -EIO;
2646 break;
2647 }
2648
2649 if (wdata->result)
2650 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2651
2652 queue_work(cifsiod_wq, &wdata->work);
2653 DeleteMidQEntry(mid);
2654 add_credits(tcon->ses->server, credits_received, 0);
2655}
2656
2657/* smb2_async_writev - send an async write, and set up mid to handle result */
2658int
4a5c80d7
SF		 2659smb2_async_writev(struct cifs_writedata *wdata,
2660 void (*release)(struct kref *kref))
33319141 2661{
cb7e9eab 2662 int rc = -EACCES, flags = 0;
33319141 2663 struct smb2_write_req *req = NULL;
31473fc4 2664 struct smb2_sync_hdr *shdr;
33319141 2665 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
cb7e9eab 2666 struct TCP_Server_Info *server = tcon->ses->server;
738f9de5
PS		 2667 struct kvec iov[2];
2668 struct smb_rqst rqst = { };
33319141
PS		 2669
2670 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
cb7e9eab
PS		 2671 if (rc) {
2672 if (rc == -EAGAIN && wdata->credits) {
2673 /* credits was reset by reconnect */
2674 wdata->credits = 0;
2675 /* reduce in_flight value since we won't send the req */
2676 spin_lock(&server->req_lock);
2677 server->in_flight--;
2678 spin_unlock(&server->req_lock);
2679 }
33319141 2680 goto async_writev_out;
cb7e9eab 2681 }
33319141 2682
7fb8986e
PS		 2683 if (encryption_required(tcon))
2684 flags |= CIFS_TRANSFORM_REQ;
2685
31473fc4
PS		 2686 shdr = get_sync_hdr(req);
2687 shdr->ProcessId = cpu_to_le32(wdata->cfile->pid);
33319141
PS		 2688
2689 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
2690 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
2691 req->WriteChannelInfoOffset = 0;
2692 req->WriteChannelInfoLength = 0;
2693 req->Channel = 0;
2694 req->Offset = cpu_to_le64(wdata->offset);
2695 /* 4 for rfc1002 length field */
2696 req->DataOffset = cpu_to_le16(
2697 offsetof(struct smb2_write_req, Buffer) - 4);
2698 req->RemainingBytes = 0;
2699
2700 /* 4 for rfc1002 length field and 1 for Buffer */
738f9de5
PS		 2701 iov[0].iov_len = 4;
2702 iov[0].iov_base = req;
2703 iov[1].iov_len = get_rfc1002_length(req) - 1;
2704 iov[1].iov_base = (char *)req + 4;
33319141 2705
738f9de5
PS		 2706 rqst.rq_iov = iov;
2707 rqst.rq_nvec = 2;
eddb079d
JL		 2708 rqst.rq_pages = wdata->pages;
2709 rqst.rq_npages = wdata->nr_pages;
2710 rqst.rq_pagesz = wdata->pagesz;
2711 rqst.rq_tailsz = wdata->tailsz;
33319141 2712
f96637be
JP		 2713 cifs_dbg(FYI, "async write at %llu %u bytes\n",
2714 wdata->offset, wdata->bytes);
33319141
PS		 2715
2716 req->Length = cpu_to_le32(wdata->bytes);
2717
2718 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
2719
cb7e9eab 2720 if (wdata->credits) {
31473fc4 2721 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
cb7e9eab 2722 SMB2_MAX_BUFFER_SIZE));
31473fc4 2723 shdr->CreditRequest = shdr->CreditCharge;
cb7e9eab
PS		 2724 spin_lock(&server->req_lock);
2725 server->credits += wdata->credits -
31473fc4 2726 le16_to_cpu(shdr->CreditCharge);
cb7e9eab
PS		 2727 spin_unlock(&server->req_lock);
2728 wake_up(&server->request_q);
7fb8986e 2729 flags |= CIFS_HAS_CREDITS;
cb7e9eab
PS		 2730 }
2731
33319141 2732 kref_get(&wdata->refcount);
9b7c18a2
PS		 2733 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
2734 wdata, flags);
33319141 2735
e5d04887 2736 if (rc) {
4a5c80d7 2737 kref_put(&wdata->refcount, release);
e5d04887
PS		 2738 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2739 }
33319141 2740
33319141
PS		 2741async_writev_out:
2742 cifs_small_buf_release(req);
33319141
PS		 2743 return rc;
2744}
009d3443
PS		 2745
2746/*
2747 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2748 * The length field from io_parms must be at least 1 and indicates a number of
2749 * elements with data to write that begins with position 1 in iov array. All
2750 * data length is specified by count.
2751 */
2752int
2753SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
2754 unsigned int *nbytes, struct kvec *iov, int n_vec)
2755{
2756 int rc = 0;
2757 struct smb2_write_req *req = NULL;
2758 struct smb2_write_rsp *rsp = NULL;
2759 int resp_buftype;
da502f7d 2760 struct kvec rsp_iov;
7fb8986e 2761 int flags = 0;
da502f7d 2762
009d3443
PS		 2763 *nbytes = 0;
2764
2765 if (n_vec < 1)
2766 return rc;
2767
2768 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
2769 if (rc)
2770 return rc;
2771
2772 if (io_parms->tcon->ses->server == NULL)
2773 return -ECONNABORTED;
2774
7fb8986e
PS		 2775 if (encryption_required(io_parms->tcon))
2776 flags |= CIFS_TRANSFORM_REQ;
2777
31473fc4 2778 req->hdr.sync_hdr.ProcessId = cpu_to_le32(io_parms->pid);
009d3443
PS		 2779
2780 req->PersistentFileId = io_parms->persistent_fid;
2781 req->VolatileFileId = io_parms->volatile_fid;
2782 req->WriteChannelInfoOffset = 0;
2783 req->WriteChannelInfoLength = 0;
2784 req->Channel = 0;
2785 req->Length = cpu_to_le32(io_parms->length);
2786 req->Offset = cpu_to_le64(io_parms->offset);
2787 /* 4 for rfc1002 length field */
2788 req->DataOffset = cpu_to_le16(
2789 offsetof(struct smb2_write_req, Buffer) - 4);
2790 req->RemainingBytes = 0;
2791
2792 iov[0].iov_base = (char *)req;
2793 /* 4 for rfc1002 length field and 1 for Buffer */
2794 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2795
2796 /* length of entire message including data to be written */
2797 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
2798
2799 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
7fb8986e 2800 &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2801 cifs_small_buf_release(req);
2802 rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
009d3443
PS		 2803
2804 if (rc) {
2805 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
f96637be 2806 cifs_dbg(VFS, "Send error in write = %d\n", rc);
e5d04887 2807 } else
009d3443 2808 *nbytes = le32_to_cpu(rsp->DataLength);
e5d04887
PS		 2809
2810 free_rsp_buf(resp_buftype, rsp);
009d3443
PS		 2811 return rc;
2812}
35143eb5 2813
d324f08d
PS		 2814static unsigned int
2815num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
2816{
2817 int len;
2818 unsigned int entrycount = 0;
2819 unsigned int next_offset = 0;
2820 FILE_DIRECTORY_INFO *entryptr;
2821
2822 if (bufstart == NULL)
2823 return 0;
2824
2825 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
2826
2827 while (1) {
2828 entryptr = (FILE_DIRECTORY_INFO *)
2829 ((char *)entryptr + next_offset);
2830
2831 if ((char *)entryptr + size > end_of_buf) {
f96637be 2832 cifs_dbg(VFS, "malformed search entry would overflow\n");
d324f08d
PS		 2833 break;
2834 }
2835
2836 len = le32_to_cpu(entryptr->FileNameLength);
2837 if ((char *)entryptr + len + size > end_of_buf) {
f96637be
JP		 2838 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
2839 end_of_buf);
d324f08d
PS		 2840 break;
2841 }
2842
2843 *lastentry = (char *)entryptr;
2844 entrycount++;
2845
2846 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
2847 if (!next_offset)
2848 break;
2849 }
2850
2851 return entrycount;
2852}
2853
2854/*
2855 * Readdir/FindFirst
2856 */
2857int
2858SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
2859 u64 persistent_fid, u64 volatile_fid, int index,
2860 struct cifs_search_info *srch_inf)
2861{
2862 struct smb2_query_directory_req *req;
2863 struct smb2_query_directory_rsp *rsp = NULL;
2864 struct kvec iov[2];
da502f7d 2865 struct kvec rsp_iov;
d324f08d
PS		 2866 int rc = 0;
2867 int len;
75fdfc84 2868 int resp_buftype = CIFS_NO_BUFFER;
d324f08d
PS		 2869 unsigned char *bufptr;
2870 struct TCP_Server_Info *server;
2871 struct cifs_ses *ses = tcon->ses;
2872 __le16 asteriks = cpu_to_le16('*');
2873 char *end_of_smb;
2874 unsigned int output_size = CIFSMaxBufSize;
2875 size_t info_buf_size;
7fb8986e 2876 int flags = 0;
d324f08d
PS		 2877
2878 if (ses && (ses->server))
2879 server = ses->server;
2880 else
2881 return -EIO;
2882
2883 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
2884 if (rc)
2885 return rc;
2886
7fb8986e
PS		 2887 if (encryption_required(tcon))
2888 flags |= CIFS_TRANSFORM_REQ;
2889
d324f08d
PS		 2890 switch (srch_inf->info_level) {
2891 case SMB_FIND_FILE_DIRECTORY_INFO:
2892 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
2893 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
2894 break;
2895 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
2896 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
2897 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
2898 break;
2899 default:
f96637be
JP		 2900 cifs_dbg(VFS, "info level %u isn't supported\n",
2901 srch_inf->info_level);
d324f08d
PS		 2902 rc = -EINVAL;
2903 goto qdir_exit;
2904 }
2905
2906 req->FileIndex = cpu_to_le32(index);
2907 req->PersistentFileId = persistent_fid;
2908 req->VolatileFileId = volatile_fid;
2909
2910 len = 0x2;
2911 bufptr = req->Buffer;
2912 memcpy(bufptr, &asteriks, len);
2913
2914 req->FileNameOffset =
2915 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
2916 req->FileNameLength = cpu_to_le16(len);
2917 /*
2918 * BB could be 30 bytes or so longer if we used SMB2 specific
2919 * buffer lengths, but this is safe and close enough.
2920 */
2921 output_size = min_t(unsigned int, output_size, server->maxBuf);
2922 output_size = min_t(unsigned int, output_size, 2 << 15);
2923 req->OutputBufferLength = cpu_to_le32(output_size);
2924
2925 iov[0].iov_base = (char *)req;
2926 /* 4 for RFC1001 length and 1 for Buffer */
2927 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2928
2929 iov[1].iov_base = (char *)(req->Buffer);
2930 iov[1].iov_len = len;
2931
2932 inc_rfc1001_len(req, len - 1 /* Buffer */);
2933
7fb8986e 2934 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2935 cifs_small_buf_release(req);
2936 rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
e5d04887 2937
d324f08d 2938 if (rc) {
31473fc4
PS		 2939 if (rc == -ENODATA &&
2940 rsp->hdr.sync_hdr.Status == STATUS_NO_MORE_FILES) {
52755808
PS		 2941 srch_inf->endOfSearch = true;
2942 rc = 0;
2943 }
d324f08d
PS		 2944 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
2945 goto qdir_exit;
2946 }
d324f08d
PS		 2947
2948 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2949 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2950 info_buf_size);
2951 if (rc)
2952 goto qdir_exit;
2953
2954 srch_inf->unicode = true;
2955
2956 if (srch_inf->ntwrk_buf_start) {
2957 if (srch_inf->smallBuf)
2958 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
2959 else
2960 cifs_buf_release(srch_inf->ntwrk_buf_start);
2961 }
2962 srch_inf->ntwrk_buf_start = (char *)rsp;
2963 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
2964 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
2965 /* 4 for rfc1002 length field */
2966 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
2967 srch_inf->entries_in_buffer =
2968 num_entries(srch_inf->srch_entries_start, end_of_smb,
2969 &srch_inf->last_entry, info_buf_size);
2970 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
f96637be
JP		 2971 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
2972 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
2973 srch_inf->srch_entries_start, srch_inf->last_entry);
d324f08d
PS		 2974 if (resp_buftype == CIFS_LARGE_BUFFER)
2975 srch_inf->smallBuf = false;
2976 else if (resp_buftype == CIFS_SMALL_BUFFER)
2977 srch_inf->smallBuf = true;
2978 else
f96637be 2979 cifs_dbg(VFS, "illegal search buffer type\n");
d324f08d 2980
d324f08d
PS		 2981 return rc;
2982
2983qdir_exit:
2984 free_rsp_buf(resp_buftype, rsp);
2985 return rc;
2986}
2987
35143eb5
PS		 2988static int
2989send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
dac95340
SP		 2990 u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
2991 u8 info_type, u32 additional_info, unsigned int num,
2992 void **data, unsigned int *size)
35143eb5
PS		 2993{
2994 struct smb2_set_info_req *req;
2995 struct smb2_set_info_rsp *rsp = NULL;
2996 struct kvec *iov;
da502f7d 2997 struct kvec rsp_iov;
35143eb5
PS		 2998 int rc = 0;
2999 int resp_buftype;
3000 unsigned int i;
35143eb5 3001 struct cifs_ses *ses = tcon->ses;
7fb8986e 3002 int flags = 0;
35143eb5 3003
68a6afa7 3004 if (!ses || !(ses->server))
35143eb5
PS		 3005 return -EIO;
3006
3007 if (!num)
3008 return -EINVAL;
3009
3010 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
3011 if (!iov)
3012 return -ENOMEM;
3013
3014 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
3015 if (rc) {
3016 kfree(iov);
3017 return rc;
3018 }
3019
7fb8986e
PS		 3020 if (encryption_required(tcon))
3021 flags |= CIFS_TRANSFORM_REQ;
3022
31473fc4 3023 req->hdr.sync_hdr.ProcessId = cpu_to_le32(pid);
c839ff24 3024
dac95340 3025 req->InfoType = info_type;
35143eb5
PS		 3026 req->FileInfoClass = info_class;
3027 req->PersistentFileId = persistent_fid;
3028 req->VolatileFileId = volatile_fid;
dac95340 3029 req->AdditionalInformation = cpu_to_le32(additional_info);
35143eb5
PS		 3030
3031 /* 4 for RFC1001 length and 1 for Buffer */
3032 req->BufferOffset =
3033 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
3034 req->BufferLength = cpu_to_le32(*size);
3035
3036 inc_rfc1001_len(req, *size - 1 /* Buffer */);
3037
3038 memcpy(req->Buffer, *data, *size);
3039
3040 iov[0].iov_base = (char *)req;
3041 /* 4 for RFC1001 length */
3042 iov[0].iov_len = get_rfc1002_length(req) + 4;
3043
3044 for (i = 1; i < num; i++) {
3045 inc_rfc1001_len(req, size[i]);
3046 le32_add_cpu(&req->BufferLength, size[i]);
3047 iov[i].iov_base = (char *)data[i];
3048 iov[i].iov_len = size[i];
3049 }
3050
7fb8986e 3051 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 3052 cifs_small_buf_release(req);
3053 rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
35143eb5 3054
7d3fb24b 3055 if (rc != 0)
35143eb5 3056 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
7d3fb24b 3057
35143eb5
PS		 3058 free_rsp_buf(resp_buftype, rsp);
3059 kfree(iov);
3060 return rc;
3061}
3062
3063int
3064SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
3065 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3066{
3067 struct smb2_file_rename_info info;
3068 void **data;
3069 unsigned int size[2];
3070 int rc;
3071 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3072
3073 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
3074 if (!data)
3075 return -ENOMEM;
3076
3077 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
3078 /* 0 = fail if target already exists */
3079 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3080 info.FileNameLength = cpu_to_le32(len);
3081
3082 data[0] = &info;
3083 size[0] = sizeof(struct smb2_file_rename_info);
3084
3085 data[1] = target_file;
3086 size[1] = len + 2 /* null */;
3087
3088 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3089 current->tgid, FILE_RENAME_INFORMATION, SMB2_O_INFO_FILE,
3090 0, 2, data, size);
35143eb5
PS		 3091 kfree(data);
3092 return rc;
3093}
568798cc 3094
897fba11
SF		 3095int
3096SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
3097 u64 persistent_fid, u64 volatile_fid)
3098{
3099 __u8 delete_pending = 1;
3100 void *data;
3101 unsigned int size;
3102
3103 data = &delete_pending;
3104 size = 1; /* sizeof __u8 */
3105
3106 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3107 current->tgid, FILE_DISPOSITION_INFORMATION, SMB2_O_INFO_FILE,
3108 0, 1, &data, &size);
897fba11
SF		 3109}
3110
568798cc
PS		 3111int
3112SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
3113 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3114{
3115 struct smb2_file_link_info info;
3116 void **data;
3117 unsigned int size[2];
3118 int rc;
3119 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3120
3121 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
3122 if (!data)
3123 return -ENOMEM;
3124
3125 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
3126 /* 0 = fail if link already exists */
3127 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3128 info.FileNameLength = cpu_to_le32(len);
3129
3130 data[0] = &info;
3131 size[0] = sizeof(struct smb2_file_link_info);
3132
3133 data[1] = target_file;
3134 size[1] = len + 2 /* null */;
3135
3136 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3137 current->tgid, FILE_LINK_INFORMATION, SMB2_O_INFO_FILE,
3138 0, 2, data, size);
568798cc
PS		 3139 kfree(data);
3140 return rc;
3141}
c839ff24
PS		 3142
3143int
3144SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
f29ebb47 3145 u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc)
c839ff24
PS		 3146{
3147 struct smb2_file_eof_info info;
3148 void *data;
3149 unsigned int size;
3150
3151 info.EndOfFile = *eof;
3152
3153 data = &info;
3154 size = sizeof(struct smb2_file_eof_info);
3155
f29ebb47
SF		 3156 if (is_falloc)
3157 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3158 pid, FILE_ALLOCATION_INFORMATION, SMB2_O_INFO_FILE,
3159 0, 1, &data, &size);
f29ebb47
SF		 3160 else
3161 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3162 pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE,
3163 0, 1, &data, &size);
c839ff24 3164}
1feeaac7
PS		 3165
3166int
3167SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
3168 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
3169{
3170 unsigned int size;
3171 size = sizeof(FILE_BASIC_INFO);
3172 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3173 current->tgid, FILE_BASIC_INFORMATION, SMB2_O_INFO_FILE,
3174 0, 1, (void **)&buf, &size);
3175}
3176
3177int
3178SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
3179 u64 persistent_fid, u64 volatile_fid,
3180 struct cifs_ntsd *pnntsd, int pacllen, int aclflag)
3181{
3182 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3183 current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag,
3184 1, (void **)&pnntsd, &pacllen);
1feeaac7 3185}
983c88a4
PS		 3186
3187int
3188SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
3189 const u64 persistent_fid, const u64 volatile_fid,
3190 __u8 oplock_level)
3191{
3192 int rc;
3193 struct smb2_oplock_break *req = NULL;
7fb8986e 3194 int flags = CIFS_OBREAK_OP;
983c88a4 3195
f96637be 3196 cifs_dbg(FYI, "SMB2_oplock_break\n");
983c88a4 3197 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
983c88a4
PS		 3198 if (rc)
3199 return rc;
3200
7fb8986e
PS		 3201 if (encryption_required(tcon))
3202 flags |= CIFS_TRANSFORM_REQ;
3203
983c88a4
PS		 3204 req->VolatileFid = volatile_fid;
3205 req->PersistentFid = persistent_fid;
3206 req->OplockLevel = oplock_level;
31473fc4 3207 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
983c88a4 3208
7fb8986e 3209 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, flags);
da502f7d 3210 cifs_small_buf_release(req);
983c88a4
PS		 3211
3212 if (rc) {
3213 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 3214 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
983c88a4
PS		 3215 }
3216
3217 return rc;
3218}
6fc05c25
PS		 3219
3220static void
3221copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
3222 struct kstatfs *kst)
3223{
3224 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
3225 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
3226 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
42bec214
SP		 3227 kst->f_bfree = kst->f_bavail =
3228 le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
6fc05c25
PS		 3229 return;
3230}
3231
3232static int
3233build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
3234 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
3235{
3236 int rc;
3237 struct smb2_query_info_req *req;
3238
f96637be 3239 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
6fc05c25
PS		 3240
3241 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
3242 return -EIO;
3243
3244 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
3245 if (rc)
3246 return rc;
3247
3248 req->InfoType = SMB2_O_INFO_FILESYSTEM;
3249 req->FileInfoClass = level;
3250 req->PersistentFileId = persistent_fid;
3251 req->VolatileFileId = volatile_fid;
3252 /* 4 for rfc1002 length field and 1 for pad */
3253 req->InputBufferOffset =
3254 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
3255 req->OutputBufferLength = cpu_to_le32(
3256 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
3257
3258 iov->iov_base = (char *)req;
3259 /* 4 for rfc1002 length field */
3260 iov->iov_len = get_rfc1002_length(req) + 4;
3261 return 0;
3262}
3263
3264int
3265SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
3266 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
3267{
3268 struct smb2_query_info_rsp *rsp = NULL;
3269 struct kvec iov;
da502f7d 3270 struct kvec rsp_iov;
6fc05c25
PS		 3271 int rc = 0;
3272 int resp_buftype;
3273 struct cifs_ses *ses = tcon->ses;
3274 struct smb2_fs_full_size_info *info = NULL;
7fb8986e 3275 int flags = 0;
6fc05c25
PS		 3276
3277 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
3278 sizeof(struct smb2_fs_full_size_info),
3279 persistent_fid, volatile_fid);
3280 if (rc)
3281 return rc;
3282
7fb8986e
PS		 3283 if (encryption_required(tcon))
3284 flags |= CIFS_TRANSFORM_REQ;
3285
3286 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d 3287 cifs_small_buf_release(iov.iov_base);
6fc05c25
PS		 3288 if (rc) {
3289 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
34f62640 3290 goto qfsinf_exit;
6fc05c25 3291 }
da502f7d 3292 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
6fc05c25
PS		 3293
3294 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
3295 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
3296 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
3297 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
3298 sizeof(struct smb2_fs_full_size_info));
3299 if (!rc)
3300 copy_fs_info_to_kstatfs(info, fsdata);
3301
34f62640 3302qfsinf_exit:
da502f7d 3303 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
34f62640
SF		 3304 return rc;
3305}
3306
3307int
3308SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2167114c 3309 u64 persistent_fid, u64 volatile_fid, int level)
34f62640
SF		 3310{
3311 struct smb2_query_info_rsp *rsp = NULL;
3312 struct kvec iov;
da502f7d 3313 struct kvec rsp_iov;
34f62640 3314 int rc = 0;
2167114c 3315 int resp_buftype, max_len, min_len;
34f62640
SF		 3316 struct cifs_ses *ses = tcon->ses;
3317 unsigned int rsp_len, offset;
7fb8986e 3318 int flags = 0;
34f62640 3319
2167114c
SF		 3320 if (level == FS_DEVICE_INFORMATION) {
3321 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3322 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3323 } else if (level == FS_ATTRIBUTE_INFORMATION) {
3324 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
3325 min_len = MIN_FS_ATTR_INFO_SIZE;
af6a12ea
SF		 3326 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
3327 max_len = sizeof(struct smb3_fs_ss_info);
3328 min_len = sizeof(struct smb3_fs_ss_info);
2167114c 3329 } else {
af6a12ea 3330 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2167114c
SF		 3331 return -EINVAL;
3332 }
3333
3334 rc = build_qfs_info_req(&iov, tcon, level, max_len,
34f62640
SF		 3335 persistent_fid, volatile_fid);
3336 if (rc)
3337 return rc;
3338
7fb8986e
PS		 3339 if (encryption_required(tcon))
3340 flags |= CIFS_TRANSFORM_REQ;
3341
3342 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d 3343 cifs_small_buf_release(iov.iov_base);
34f62640
SF		 3344 if (rc) {
3345 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
3346 goto qfsattr_exit;
3347 }
da502f7d 3348 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
34f62640
SF		 3349
3350 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
3351 offset = le16_to_cpu(rsp->OutputBufferOffset);
2167114c
SF		 3352 rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
3353 if (rc)
3354 goto qfsattr_exit;
3355
3356 if (level == FS_ATTRIBUTE_INFORMATION)
34f62640
SF		 3357 memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
3358 + (char *)&rsp->hdr, min_t(unsigned int,
2167114c
SF		 3359 rsp_len, max_len));
3360 else if (level == FS_DEVICE_INFORMATION)
3361 memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
3362 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
af6a12ea
SF		 3363 else if (level == FS_SECTOR_SIZE_INFORMATION) {
3364 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
3365 (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
3366 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
3367 tcon->perf_sector_size =
3368 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
3369 }
34f62640
SF		 3370
3371qfsattr_exit:
da502f7d 3372 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
6fc05c25
PS		 3373 return rc;
3374}
f7ba7fe6
PS		 3375
3376int
3377smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
3378 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3379 const __u32 num_lock, struct smb2_lock_element *buf)
3380{
3381 int rc = 0;
3382 struct smb2_lock_req *req = NULL;
3383 struct kvec iov[2];
da502f7d 3384 struct kvec rsp_iov;
f7ba7fe6
PS		 3385 int resp_buf_type;
3386 unsigned int count;
7fb8986e 3387 int flags = CIFS_NO_RESP;
f7ba7fe6 3388
f96637be 3389 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
f7ba7fe6
PS		 3390
3391 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
3392 if (rc)
3393 return rc;
3394
7fb8986e
PS		 3395 if (encryption_required(tcon))
3396 flags |= CIFS_TRANSFORM_REQ;
3397
31473fc4 3398 req->hdr.sync_hdr.ProcessId = cpu_to_le32(pid);
f7ba7fe6
PS		 3399 req->LockCount = cpu_to_le16(num_lock);
3400
3401 req->PersistentFileId = persist_fid;
3402 req->VolatileFileId = volatile_fid;
3403
3404 count = num_lock * sizeof(struct smb2_lock_element);
3405 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
3406
3407 iov[0].iov_base = (char *)req;
3408 /* 4 for rfc1002 length field and count for all locks */
3409 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
3410 iov[1].iov_base = (char *)buf;
3411 iov[1].iov_len = count;
3412
3413 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
7fb8986e 3414 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, flags,
da502f7d
PS		 3415 &rsp_iov);
3416 cifs_small_buf_release(req);
f7ba7fe6 3417 if (rc) {
f96637be 3418 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
f7ba7fe6
PS		 3419 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
3420 }
3421
3422 return rc;
3423}
3424
3425int
3426SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
3427 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3428 const __u64 length, const __u64 offset, const __u32 lock_flags,
3429 const bool wait)
3430{
3431 struct smb2_lock_element lock;
3432
3433 lock.Offset = cpu_to_le64(offset);
3434 lock.Length = cpu_to_le64(length);
3435 lock.Flags = cpu_to_le32(lock_flags);
3436 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
3437 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
3438
3439 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
3440}
0822f514
PS		 3441
3442int
3443SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
3444 __u8 *lease_key, const __le32 lease_state)
3445{
3446 int rc;
3447 struct smb2_lease_ack *req = NULL;
7fb8986e 3448 int flags = CIFS_OBREAK_OP;
0822f514 3449
f96637be 3450 cifs_dbg(FYI, "SMB2_lease_break\n");
0822f514 3451 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
0822f514
PS		 3452 if (rc)
3453 return rc;
3454
7fb8986e
PS		 3455 if (encryption_required(tcon))
3456 flags |= CIFS_TRANSFORM_REQ;
3457
31473fc4 3458 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
0822f514
PS		 3459 req->StructureSize = cpu_to_le16(36);
3460 inc_rfc1001_len(req, 12);
3461
3462 memcpy(req->LeaseKey, lease_key, 16);
3463 req->LeaseState = lease_state;
3464
7fb8986e 3465 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, flags);
da502f7d 3466 cifs_small_buf_release(req);
0822f514
PS		 3467
3468 if (rc) {
3469 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 3470 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
0822f514
PS		 3471 }
3472
3473 return rc;
3474}
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