]> git.ipfire.org Git - thirdparty/linux.git/blame - fs/cifs/smb2pdu.c
projects / thirdparty / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
cifs: cifsacl: Use a temporary ops variable to reduce code length
[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 */
517 if (rc != 0)
518 goto neg_exit;
519
f96637be 520 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
ec2e4523 521
e4aa25e7
SF		 522 /* BB we may eventually want to match the negotiated vs. requested
523 dialect, even though we are only requesting one at a time */
524 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
f96637be 525 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
e4aa25e7 526 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
f96637be 527 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
e4aa25e7 528 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
f96637be 529 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
20b6d8b4
SF		 530 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
531 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
5f7fbf73
SF		 532#ifdef CONFIG_CIFS_SMB311
533 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
534 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
535#endif /* SMB311 */
ec2e4523 536 else {
f799d623 537 cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
f96637be 538 le16_to_cpu(rsp->DialectRevision));
ec2e4523
PS		 539 rc = -EIO;
540 goto neg_exit;
541 }
542 server->dialect = le16_to_cpu(rsp->DialectRevision);
543
e598d1d8
JL		 544 /* SMB2 only has an extended negflavor */
545 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
2365c4ea
PS		 546 /* set it to the maximum buffer size value we can send with 1 credit */
547 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
548 SMB2_MAX_BUFFER_SIZE);
ec2e4523
PS		 549 server->max_read = le32_to_cpu(rsp->MaxReadSize);
550 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
551 /* BB Do we need to validate the SecurityMode? */
552 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
553 server->capabilities = le32_to_cpu(rsp->Capabilities);
29e20f9c
PS		 554 /* Internal types */
555 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
ec2e4523
PS		 556
557 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
558 &rsp->hdr);
5d875cc9
SF		 559 /*
560 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
561 * for us will be
562 * ses->sectype = RawNTLMSSP;
563 * but for time being this is our only auth choice so doesn't matter.
564 * We just found a server which sets blob length to zero expecting raw.
565 */
67dbea2c 566 if (blob_length == 0) {
5d875cc9 567 cifs_dbg(FYI, "missing security blob on negprot\n");
67dbea2c
PS		 568 server->sec_ntlmssp = true;
569 }
3c1bf7e4 570
38d77c50 571 rc = cifs_enable_signing(server, ses->sign);
9ddec561
JL		 572 if (rc)
573 goto neg_exit;
ceb1b0b9 574 if (blob_length) {
ebdd207e 575 rc = decode_negTokenInit(security_blob, blob_length, server);
ceb1b0b9
SF		 576 if (rc == 1)
577 rc = 0;
578 else if (rc == 0)
579 rc = -EIO;
ec2e4523 580 }
ec2e4523
PS		 581neg_exit:
582 free_rsp_buf(resp_buftype, rsp);
583 return rc;
584}
5478f9ba 585
ff1c038a
SF		 586int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
587{
588 int rc = 0;
589 struct validate_negotiate_info_req vneg_inbuf;
590 struct validate_negotiate_info_rsp *pneg_rsp;
591 u32 rsplen;
592
593 cifs_dbg(FYI, "validate negotiate\n");
594
595 /*
596 * validation ioctl must be signed, so no point sending this if we
597 * can not sign it. We could eventually change this to selectively
598 * sign just this, the first and only signed request on a connection.
599 * This is good enough for now since a user who wants better security
600 * would also enable signing on the mount. Having validation of
601 * negotiate info for signed connections helps reduce attack vectors
602 */
603 if (tcon->ses->server->sign == false)
604 return 0; /* validation requires signing */
605
606 vneg_inbuf.Capabilities =
607 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
39552ea8
SP		 608 memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid,
609 SMB2_CLIENT_GUID_SIZE);
ff1c038a
SF		 610
611 if (tcon->ses->sign)
612 vneg_inbuf.SecurityMode =
613 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
614 else if (global_secflags & CIFSSEC_MAY_SIGN)
615 vneg_inbuf.SecurityMode =
616 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
617 else
618 vneg_inbuf.SecurityMode = 0;
619
620 vneg_inbuf.DialectCount = cpu_to_le16(1);
621 vneg_inbuf.Dialects[0] =
622 cpu_to_le16(tcon->ses->server->vals->protocol_id);
623
624 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
625 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
51146625 626 false /* use_ipc */,
ff1c038a
SF		 627 (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
628 (char **)&pneg_rsp, &rsplen);
629
630 if (rc != 0) {
631 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
632 return -EIO;
633 }
634
635 if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
7db0a6ef
SF		 636 cifs_dbg(VFS, "invalid protocol negotiate response size: %d\n",
637 rsplen);
638
639 /* relax check since Mac returns max bufsize allowed on ioctl */
640 if (rsplen > CIFSMaxBufSize)
641 return -EIO;
ff1c038a
SF		 642 }
643
644 /* check validate negotiate info response matches what we got earlier */
645 if (pneg_rsp->Dialect !=
646 cpu_to_le16(tcon->ses->server->vals->protocol_id))
647 goto vneg_out;
648
649 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
650 goto vneg_out;
651
652 /* do not validate server guid because not saved at negprot time yet */
653
654 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
655 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
656 goto vneg_out;
657
658 /* validate negotiate successful */
659 cifs_dbg(FYI, "validate negotiate info successful\n");
660 return 0;
661
662vneg_out:
663 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
664 return -EIO;
665}
666
ef65aaed
SP		 667enum securityEnum
668smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
669{
670 switch (requested) {
671 case Kerberos:
672 case RawNTLMSSP:
673 return requested;
674 case NTLMv2:
675 return RawNTLMSSP;
676 case Unspecified:
677 if (server->sec_ntlmssp &&
678 (global_secflags & CIFSSEC_MAY_NTLMSSP))
679 return RawNTLMSSP;
680 if ((server->sec_kerberos || server->sec_mskerberos) &&
681 (global_secflags & CIFSSEC_MAY_KRB5))
682 return Kerberos;
683 /* Fallthrough */
684 default:
685 return Unspecified;
686 }
687}
688
3baf1a7b
SP		 689struct SMB2_sess_data {
690 unsigned int xid;
691 struct cifs_ses *ses;
692 struct nls_table *nls_cp;
693 void (*func)(struct SMB2_sess_data *);
694 int result;
695 u64 previous_session;
696
697 /* we will send the SMB in three pieces:
698 * a fixed length beginning part, an optional
699 * SPNEGO blob (which can be zero length), and a
700 * last part which will include the strings
701 * and rest of bcc area. This allows us to avoid
702 * a large buffer 17K allocation
703 */
704 int buf0_type;
705 struct kvec iov[2];
706};
707
708static int
709SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
710{
711 int rc;
712 struct cifs_ses *ses = sess_data->ses;
713 struct smb2_sess_setup_req *req;
714 struct TCP_Server_Info *server = ses->server;
715
716 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
717 if (rc)
718 return rc;
719
31473fc4
PS		 720 /* First session, not a reauthenticate */
721 req->hdr.sync_hdr.SessionId = 0;
3baf1a7b
SP		 722
723 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
724 req->PreviousSessionId = sess_data->previous_session;
725
726 req->Flags = 0; /* MBZ */
727 /* to enable echos and oplocks */
31473fc4 728 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(3);
3baf1a7b
SP		 729
730 /* only one of SMB2 signing flags may be set in SMB2 request */
731 if (server->sign)
732 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
733 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
734 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
735 else
736 req->SecurityMode = 0;
737
738 req->Capabilities = 0;
739 req->Channel = 0; /* MBZ */
740
741 sess_data->iov[0].iov_base = (char *)req;
742 /* 4 for rfc1002 length field and 1 for pad */
743 sess_data->iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
744 /*
745 * This variable will be used to clear the buffer
746 * allocated above in case of any error in the calling function.
747 */
748 sess_data->buf0_type = CIFS_SMALL_BUFFER;
749
750 return 0;
751}
752
753static void
754SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
755{
756 free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
757 sess_data->buf0_type = CIFS_NO_BUFFER;
758}
759
760static int
761SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
762{
763 int rc;
764 struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
da502f7d 765 struct kvec rsp_iov = { NULL, 0 };
3baf1a7b
SP		 766
767 /* Testing shows that buffer offset must be at location of Buffer[0] */
768 req->SecurityBufferOffset =
769 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
770 1 /* pad */ - 4 /* rfc1001 len */);
771 req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
772
773 inc_rfc1001_len(req, sess_data->iov[1].iov_len - 1 /* pad */);
774
775 /* BB add code to build os and lm fields */
776
777 rc = SendReceive2(sess_data->xid, sess_data->ses,
778 sess_data->iov, 2,
779 &sess_data->buf0_type,
da502f7d
PS		 780 CIFS_LOG_ERROR | CIFS_NEG_OP, &rsp_iov);
781 cifs_small_buf_release(sess_data->iov[0].iov_base);
782 memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
3baf1a7b
SP		 783
784 return rc;
785}
786
787static int
788SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
789{
790 int rc = 0;
791 struct cifs_ses *ses = sess_data->ses;
792
793 mutex_lock(&ses->server->srv_mutex);
cabfb368 794 if (ses->server->ops->generate_signingkey) {
3baf1a7b 795 rc = ses->server->ops->generate_signingkey(ses);
3baf1a7b
SP		 796 if (rc) {
797 cifs_dbg(FYI,
798 "SMB3 session key generation failed\n");
799 mutex_unlock(&ses->server->srv_mutex);
cabfb368 800 return rc;
3baf1a7b
SP		 801 }
802 }
803 if (!ses->server->session_estab) {
804 ses->server->sequence_number = 0x2;
805 ses->server->session_estab = true;
806 }
807 mutex_unlock(&ses->server->srv_mutex);
808
809 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
810 spin_lock(&GlobalMid_Lock);
811 ses->status = CifsGood;
812 ses->need_reconnect = false;
813 spin_unlock(&GlobalMid_Lock);
3baf1a7b
SP		 814 return rc;
815}
816
817#ifdef CONFIG_CIFS_UPCALL
818static void
819SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
820{
821 int rc;
822 struct cifs_ses *ses = sess_data->ses;
823 struct cifs_spnego_msg *msg;
824 struct key *spnego_key = NULL;
825 struct smb2_sess_setup_rsp *rsp = NULL;
826
827 rc = SMB2_sess_alloc_buffer(sess_data);
828 if (rc)
829 goto out;
830
831 spnego_key = cifs_get_spnego_key(ses);
832 if (IS_ERR(spnego_key)) {
833 rc = PTR_ERR(spnego_key);
834 spnego_key = NULL;
835 goto out;
836 }
837
838 msg = spnego_key->payload.data[0];
839 /*
840 * check version field to make sure that cifs.upcall is
841 * sending us a response in an expected form
842 */
843 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
844 cifs_dbg(VFS,
845 "bad cifs.upcall version. Expected %d got %d",
846 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
847 rc = -EKEYREJECTED;
848 goto out_put_spnego_key;
849 }
850
851 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
852 GFP_KERNEL);
853 if (!ses->auth_key.response) {
854 cifs_dbg(VFS,
855 "Kerberos can't allocate (%u bytes) memory",
856 msg->sesskey_len);
857 rc = -ENOMEM;
858 goto out_put_spnego_key;
859 }
860 ses->auth_key.len = msg->sesskey_len;
861
862 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
863 sess_data->iov[1].iov_len = msg->secblob_len;
864
865 rc = SMB2_sess_sendreceive(sess_data);
866 if (rc)
867 goto out_put_spnego_key;
868
869 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
31473fc4 870 ses->Suid = rsp->hdr.sync_hdr.SessionId;
3baf1a7b
SP		 871
872 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
3baf1a7b
SP		 873
874 rc = SMB2_sess_establish_session(sess_data);
875out_put_spnego_key:
876 key_invalidate(spnego_key);
877 key_put(spnego_key);
878out:
879 sess_data->result = rc;
880 sess_data->func = NULL;
881 SMB2_sess_free_buffer(sess_data);
882}
883#else
884static void
885SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
886{
887 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
888 sess_data->result = -EOPNOTSUPP;
889 sess_data->func = NULL;
890}
891#endif
892
166cea4d
SP		 893static void
894SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
895
896static void
897SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
5478f9ba 898{
166cea4d
SP		 899 int rc;
900 struct cifs_ses *ses = sess_data->ses;
5478f9ba 901 struct smb2_sess_setup_rsp *rsp = NULL;
166cea4d 902 char *ntlmssp_blob = NULL;
5478f9ba 903 bool use_spnego = false; /* else use raw ntlmssp */
166cea4d 904 u16 blob_length = 0;
d4e63bd6 905
5478f9ba
PS		 906 /*
907 * If memory allocation is successful, caller of this function
908 * frees it.
909 */
910 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
166cea4d
SP		 911 if (!ses->ntlmssp) {
912 rc = -ENOMEM;
913 goto out_err;
914 }
5c234aa5 915 ses->ntlmssp->sesskey_per_smbsess = true;
5478f9ba 916
166cea4d 917 rc = SMB2_sess_alloc_buffer(sess_data);
5478f9ba 918 if (rc)
166cea4d 919 goto out_err;
5478f9ba 920
166cea4d
SP		 921 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
922 GFP_KERNEL);
923 if (ntlmssp_blob == NULL) {
924 rc = -ENOMEM;
925 goto out;
926 }
c2afb814 927
166cea4d
SP		 928 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
929 if (use_spnego) {
930 /* BB eventually need to add this */
931 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
932 rc = -EOPNOTSUPP;
933 goto out;
934 } else {
935 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
936 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
937 }
938 sess_data->iov[1].iov_base = ntlmssp_blob;
939 sess_data->iov[1].iov_len = blob_length;
c2afb814 940
166cea4d
SP		 941 rc = SMB2_sess_sendreceive(sess_data);
942 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
5478f9ba 943
166cea4d
SP		 944 /* If true, rc here is expected and not an error */
945 if (sess_data->buf0_type != CIFS_NO_BUFFER &&
31473fc4 946 rsp->hdr.sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
166cea4d 947 rc = 0;
38d77c50 948
166cea4d
SP		 949 if (rc)
950 goto out;
5478f9ba 951
166cea4d
SP		 952 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
953 le16_to_cpu(rsp->SecurityBufferOffset)) {
954 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
955 le16_to_cpu(rsp->SecurityBufferOffset));
5478f9ba 956 rc = -EIO;
166cea4d 957 goto out;
5478f9ba 958 }
166cea4d
SP		 959 rc = decode_ntlmssp_challenge(rsp->Buffer,
960 le16_to_cpu(rsp->SecurityBufferLength), ses);
961 if (rc)
962 goto out;
5478f9ba 963
166cea4d 964 cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
5478f9ba 965
5478f9ba 966
31473fc4 967 ses->Suid = rsp->hdr.sync_hdr.SessionId;
166cea4d 968 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
166cea4d
SP		 969
970out:
971 kfree(ntlmssp_blob);
972 SMB2_sess_free_buffer(sess_data);
973 if (!rc) {
974 sess_data->result = 0;
975 sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
976 return;
977 }
978out_err:
979 kfree(ses->ntlmssp);
980 ses->ntlmssp = NULL;
981 sess_data->result = rc;
982 sess_data->func = NULL;
983}
5478f9ba 984
166cea4d
SP		 985static void
986SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
987{
988 int rc;
989 struct cifs_ses *ses = sess_data->ses;
990 struct smb2_sess_setup_req *req;
991 struct smb2_sess_setup_rsp *rsp = NULL;
992 unsigned char *ntlmssp_blob = NULL;
993 bool use_spnego = false; /* else use raw ntlmssp */
994 u16 blob_length = 0;
5478f9ba 995
166cea4d
SP		 996 rc = SMB2_sess_alloc_buffer(sess_data);
997 if (rc)
998 goto out;
5478f9ba 999
166cea4d 1000 req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
31473fc4 1001 req->hdr.sync_hdr.SessionId = ses->Suid;
166cea4d
SP		 1002
1003 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
1004 sess_data->nls_cp);
1005 if (rc) {
1006 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
1007 goto out;
5478f9ba
PS		 1008 }
1009
166cea4d
SP		 1010 if (use_spnego) {
1011 /* BB eventually need to add this */
1012 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1013 rc = -EOPNOTSUPP;
1014 goto out;
1015 }
1016 sess_data->iov[1].iov_base = ntlmssp_blob;
1017 sess_data->iov[1].iov_len = blob_length;
5478f9ba 1018
166cea4d
SP		 1019 rc = SMB2_sess_sendreceive(sess_data);
1020 if (rc)
1021 goto out;
1022
1023 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1024
31473fc4 1025 ses->Suid = rsp->hdr.sync_hdr.SessionId;
5478f9ba 1026 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
5478f9ba 1027
166cea4d
SP		 1028 rc = SMB2_sess_establish_session(sess_data);
1029out:
1030 kfree(ntlmssp_blob);
1031 SMB2_sess_free_buffer(sess_data);
1032 kfree(ses->ntlmssp);
1033 ses->ntlmssp = NULL;
1034 sess_data->result = rc;
1035 sess_data->func = NULL;
1036}
d4e63bd6 1037
166cea4d
SP		 1038static int
1039SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data)
1040{
ef65aaed
SP		 1041 int type;
1042
1043 type = smb2_select_sectype(ses->server, ses->sectype);
1044 cifs_dbg(FYI, "sess setup type %d\n", type);
1045 if (type == Unspecified) {
1046 cifs_dbg(VFS,
1047 "Unable to select appropriate authentication method!");
1048 return -EINVAL;
1049 }
d4e63bd6 1050
ef65aaed 1051 switch (type) {
166cea4d
SP		 1052 case Kerberos:
1053 sess_data->func = SMB2_auth_kerberos;
1054 break;
1055 case RawNTLMSSP:
1056 sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
1057 break;
1058 default:
ef65aaed 1059 cifs_dbg(VFS, "secType %d not supported!\n", type);
166cea4d 1060 return -EOPNOTSUPP;
d4e63bd6
SP		 1061 }
1062
166cea4d
SP		 1063 return 0;
1064}
1065
1066int
1067SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
1068 const struct nls_table *nls_cp)
1069{
1070 int rc = 0;
1071 struct TCP_Server_Info *server = ses->server;
1072 struct SMB2_sess_data *sess_data;
1073
1074 cifs_dbg(FYI, "Session Setup\n");
1075
1076 if (!server) {
1077 WARN(1, "%s: server is NULL!\n", __func__);
1078 return -EIO;
d4e63bd6 1079 }
d4e63bd6 1080
166cea4d
SP		 1081 sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
1082 if (!sess_data)
1083 return -ENOMEM;
1084
1085 rc = SMB2_select_sec(ses, sess_data);
1086 if (rc)
1087 goto out;
1088 sess_data->xid = xid;
1089 sess_data->ses = ses;
1090 sess_data->buf0_type = CIFS_NO_BUFFER;
1091 sess_data->nls_cp = (struct nls_table *) nls_cp;
1092
1093 while (sess_data->func)
1094 sess_data->func(sess_data);
1095
3baf1a7b 1096 rc = sess_data->result;
166cea4d 1097out:
3baf1a7b 1098 kfree(sess_data);
5478f9ba
PS		 1099 return rc;
1100}
1101
1102int
1103SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
1104{
1105 struct smb2_logoff_req *req; /* response is also trivial struct */
1106 int rc = 0;
1107 struct TCP_Server_Info *server;
7fb8986e 1108 int flags = 0;
5478f9ba 1109
f96637be 1110 cifs_dbg(FYI, "disconnect session %p\n", ses);
5478f9ba
PS		 1111
1112 if (ses && (ses->server))
1113 server = ses->server;
1114 else
1115 return -EIO;
1116
eb4c7df6
SP		 1117 /* no need to send SMB logoff if uid already closed due to reconnect */
1118 if (ses->need_reconnect)
1119 goto smb2_session_already_dead;
1120
5478f9ba
PS		 1121 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
1122 if (rc)
1123 return rc;
1124
1125 /* since no tcon, smb2_init can not do this, so do here */
31473fc4 1126 req->hdr.sync_hdr.SessionId = ses->Suid;
7fb8986e
PS		 1127
1128 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
1129 flags |= CIFS_TRANSFORM_REQ;
1130 else if (server->sign)
31473fc4 1131 req->hdr.sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
5478f9ba 1132
7fb8986e 1133 rc = SendReceiveNoRsp(xid, ses, (char *) req, flags);
da502f7d 1134 cifs_small_buf_release(req);
5478f9ba
PS		 1135 /*
1136 * No tcon so can't do
1137 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1138 */
eb4c7df6
SP		 1139
1140smb2_session_already_dead:
5478f9ba
PS		 1141 return rc;
1142}
faaf946a
PS		 1143
1144static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
1145{
d60622eb 1146 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
faaf946a
PS		 1147}
1148
1149#define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1150
de9f68df
SF		 1151/* These are similar values to what Windows uses */
1152static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
1153{
1154 tcon->max_chunks = 256;
1155 tcon->max_bytes_chunk = 1048576;
1156 tcon->max_bytes_copy = 16777216;
1157}
1158
faaf946a
PS		 1159int
1160SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
1161 struct cifs_tcon *tcon, const struct nls_table *cp)
1162{
1163 struct smb2_tree_connect_req *req;
1164 struct smb2_tree_connect_rsp *rsp = NULL;
1165 struct kvec iov[2];
da502f7d 1166 struct kvec rsp_iov;
faaf946a
PS		 1167 int rc = 0;
1168 int resp_buftype;
1169 int unc_path_len;
1170 struct TCP_Server_Info *server;
1171 __le16 *unc_path = NULL;
7fb8986e 1172 int flags = 0;
faaf946a 1173
f96637be 1174 cifs_dbg(FYI, "TCON\n");
faaf946a
PS		 1175
1176 if ((ses->server) && tree)
1177 server = ses->server;
1178 else
1179 return -EIO;
1180
faaf946a
PS		 1181 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
1182 if (unc_path == NULL)
1183 return -ENOMEM;
1184
1185 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
1186 unc_path_len *= 2;
1187 if (unc_path_len < 2) {
1188 kfree(unc_path);
1189 return -EINVAL;
1190 }
1191
806a28ef
JMG		 1192 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
1193 if (tcon)
1194 tcon->tid = 0;
1195
faaf946a
PS		 1196 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
1197 if (rc) {
1198 kfree(unc_path);
1199 return rc;
1200 }
1201
1202 if (tcon == NULL) {
ae6f8dd4
PS		 1203 if ((ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA))
1204 flags |= CIFS_TRANSFORM_REQ;
1205
faaf946a 1206 /* since no tcon, smb2_init can not do this, so do here */
31473fc4 1207 req->hdr.sync_hdr.SessionId = ses->Suid;
b9043cc5
AA		 1208 if (ses->server->sign)
1209 req->hdr.sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
ae6f8dd4
PS		 1210 } else if (encryption_required(tcon))
1211 flags |= CIFS_TRANSFORM_REQ;
faaf946a
PS		 1212
1213 iov[0].iov_base = (char *)req;
1214 /* 4 for rfc1002 length field and 1 for pad */
1215 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1216
1217 /* Testing shows that buffer offset must be at location of Buffer[0] */
1218 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
1219 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
1220 req->PathLength = cpu_to_le16(unc_path_len - 2);
1221 iov[1].iov_base = unc_path;
1222 iov[1].iov_len = unc_path_len;
1223
1224 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
1225
7fb8986e 1226 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1227 cifs_small_buf_release(req);
1228 rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
faaf946a
PS		 1229
1230 if (rc != 0) {
1231 if (tcon) {
1232 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
1233 tcon->need_reconnect = true;
1234 }
1235 goto tcon_error_exit;
1236 }
1237
faaf946a 1238 if (tcon == NULL) {
31473fc4 1239 ses->ipc_tid = rsp->hdr.sync_hdr.TreeId;
faaf946a
PS		 1240 goto tcon_exit;
1241 }
1242
1243 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
f96637be 1244 cifs_dbg(FYI, "connection to disk share\n");
faaf946a
PS		 1245 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
1246 tcon->ipc = true;
f96637be 1247 cifs_dbg(FYI, "connection to pipe share\n");
faaf946a
PS		 1248 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
1249 tcon->print = true;
f96637be 1250 cifs_dbg(FYI, "connection to printer\n");
faaf946a 1251 } else {
f96637be 1252 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
faaf946a
PS		 1253 rc = -EOPNOTSUPP;
1254 goto tcon_error_exit;
1255 }
1256
1257 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
769ee6a4 1258 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
faaf946a
PS		 1259 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1260 tcon->tidStatus = CifsGood;
1261 tcon->need_reconnect = false;
31473fc4 1262 tcon->tid = rsp->hdr.sync_hdr.TreeId;
46b51d08 1263 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
faaf946a
PS		 1264
1265 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1266 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
f96637be 1267 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
ae6f8dd4
PS		 1268
1269 if (tcon->seal &&
1270 !(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
1271 cifs_dbg(VFS, "Encryption is requested but not supported\n");
1272
de9f68df 1273 init_copy_chunk_defaults(tcon);
ff1c038a
SF		 1274 if (tcon->ses->server->ops->validate_negotiate)
1275 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
faaf946a
PS		 1276tcon_exit:
1277 free_rsp_buf(resp_buftype, rsp);
1278 kfree(unc_path);
1279 return rc;
1280
1281tcon_error_exit:
31473fc4 1282 if (rsp->hdr.sync_hdr.Status == STATUS_BAD_NETWORK_NAME) {
f96637be 1283 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
faaf946a
PS		 1284 }
1285 goto tcon_exit;
1286}
1287
1288int
1289SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1290{
1291 struct smb2_tree_disconnect_req *req; /* response is trivial */
1292 int rc = 0;
1293 struct TCP_Server_Info *server;
1294 struct cifs_ses *ses = tcon->ses;
7fb8986e 1295 int flags = 0;
faaf946a 1296
f96637be 1297 cifs_dbg(FYI, "Tree Disconnect\n");
faaf946a
PS		 1298
1299 if (ses && (ses->server))
1300 server = ses->server;
1301 else
1302 return -EIO;
1303
1304 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1305 return 0;
1306
1307 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
1308 if (rc)
1309 return rc;
1310
7fb8986e
PS		 1311 if (encryption_required(tcon))
1312 flags |= CIFS_TRANSFORM_REQ;
1313
1314 rc = SendReceiveNoRsp(xid, ses, (char *)req, flags);
da502f7d 1315 cifs_small_buf_release(req);
faaf946a
PS		 1316 if (rc)
1317 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1318
1319 return rc;
1320}
2503a0db 1321
b8c32dbb 1322
63eb3def
PS		 1323static struct create_durable *
1324create_durable_buf(void)
1325{
1326 struct create_durable *buf;
1327
1328 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1329 if (!buf)
1330 return NULL;
1331
1332 buf->ccontext.DataOffset = cpu_to_le16(offsetof
9cbc0b73 1333 (struct create_durable, Data));
63eb3def
PS		 1334 buf->ccontext.DataLength = cpu_to_le32(16);
1335 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1336 (struct create_durable, Name));
1337 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 1338 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
63eb3def
PS		 1339 buf->Name[0] = 'D';
1340 buf->Name[1] = 'H';
1341 buf->Name[2] = 'n';
1342 buf->Name[3] = 'Q';
1343 return buf;
1344}
1345
9cbc0b73
PS		 1346static struct create_durable *
1347create_reconnect_durable_buf(struct cifs_fid *fid)
1348{
1349 struct create_durable *buf;
1350
1351 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1352 if (!buf)
1353 return NULL;
1354
1355 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1356 (struct create_durable, Data));
1357 buf->ccontext.DataLength = cpu_to_le32(16);
1358 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1359 (struct create_durable, Name));
1360 buf->ccontext.NameLength = cpu_to_le16(4);
1361 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1362 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
12197a7f 1363 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
9cbc0b73
PS		 1364 buf->Name[0] = 'D';
1365 buf->Name[1] = 'H';
1366 buf->Name[2] = 'n';
1367 buf->Name[3] = 'C';
1368 return buf;
1369}
1370
b8c32dbb 1371static __u8
42873b0a
PS		 1372parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
1373 unsigned int *epoch)
b8c32dbb
PS		 1374{
1375 char *data_offset;
b5c7cde3 1376 struct create_context *cc;
deb7deff
JM		 1377 unsigned int next;
1378 unsigned int remaining;
fd554396 1379 char *name;
b8c32dbb 1380
fd554396 1381 data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
deb7deff 1382 remaining = le32_to_cpu(rsp->CreateContextsLength);
b5c7cde3 1383 cc = (struct create_context *)data_offset;
deb7deff 1384 while (remaining >= sizeof(struct create_context)) {
b5c7cde3 1385 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
deb7deff
JM		 1386 if (le16_to_cpu(cc->NameLength) == 4 &&
1387 strncmp(name, "RqLs", 4) == 0)
1388 return server->ops->parse_lease_buf(cc, epoch);
1389
1390 next = le32_to_cpu(cc->Next);
1391 if (!next)
1392 break;
1393 remaining -= next;
1394 cc = (struct create_context *)((char *)cc + next);
1395 }
b8c32dbb 1396
b5c7cde3 1397 return 0;
b8c32dbb
PS		 1398}
1399
d22cbfec 1400static int
a41a28bd
PS		 1401add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1402 unsigned int *num_iovec, __u8 *oplock)
d22cbfec
PS		 1403{
1404 struct smb2_create_req *req = iov[0].iov_base;
1405 unsigned int num = *num_iovec;
1406
a41a28bd 1407 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
d22cbfec
PS		 1408 if (iov[num].iov_base == NULL)
1409 return -ENOMEM;
a41a28bd 1410 iov[num].iov_len = server->vals->create_lease_size;
d22cbfec
PS		 1411 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1412 if (!req->CreateContextsOffset)
1413 req->CreateContextsOffset = cpu_to_le32(
1414 sizeof(struct smb2_create_req) - 4 +
1415 iov[num - 1].iov_len);
a41a28bd
PS		 1416 le32_add_cpu(&req->CreateContextsLength,
1417 server->vals->create_lease_size);
1418 inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
d22cbfec
PS		 1419 *num_iovec = num + 1;
1420 return 0;
1421}
1422
b56eae4d
SF		 1423static struct create_durable_v2 *
1424create_durable_v2_buf(struct cifs_fid *pfid)
1425{
1426 struct create_durable_v2 *buf;
1427
1428 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
1429 if (!buf)
1430 return NULL;
1431
1432 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1433 (struct create_durable_v2, dcontext));
1434 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
1435 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1436 (struct create_durable_v2, Name));
1437 buf->ccontext.NameLength = cpu_to_le16(4);
1438
1439 buf->dcontext.Timeout = 0; /* Should this be configurable by workload */
1440 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
fa70b87c 1441 generate_random_uuid(buf->dcontext.CreateGuid);
b56eae4d
SF		 1442 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
1443
1444 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1445 buf->Name[0] = 'D';
1446 buf->Name[1] = 'H';
1447 buf->Name[2] = '2';
1448 buf->Name[3] = 'Q';
1449 return buf;
1450}
1451
1452static struct create_durable_handle_reconnect_v2 *
1453create_reconnect_durable_v2_buf(struct cifs_fid *fid)
1454{
1455 struct create_durable_handle_reconnect_v2 *buf;
1456
1457 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
1458 GFP_KERNEL);
1459 if (!buf)
1460 return NULL;
1461
1462 buf->ccontext.DataOffset =
1463 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1464 dcontext));
1465 buf->ccontext.DataLength =
1466 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
1467 buf->ccontext.NameOffset =
1468 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1469 Name));
1470 buf->ccontext.NameLength = cpu_to_le16(4);
1471
1472 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
1473 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
1474 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1475 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
1476
1477 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1478 buf->Name[0] = 'D';
1479 buf->Name[1] = 'H';
1480 buf->Name[2] = '2';
1481 buf->Name[3] = 'C';
1482 return buf;
1483}
1484
63eb3def 1485static int
b56eae4d
SF		 1486add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
1487 struct cifs_open_parms *oparms)
1488{
1489 struct smb2_create_req *req = iov[0].iov_base;
1490 unsigned int num = *num_iovec;
1491
1492 iov[num].iov_base = create_durable_v2_buf(oparms->fid);
1493 if (iov[num].iov_base == NULL)
1494 return -ENOMEM;
1495 iov[num].iov_len = sizeof(struct create_durable_v2);
1496 if (!req->CreateContextsOffset)
1497 req->CreateContextsOffset =
1498 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1499 iov[1].iov_len);
1500 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
1501 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable_v2));
1502 *num_iovec = num + 1;
1503 return 0;
1504}
1505
1506static int
1507add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
9cbc0b73 1508 struct cifs_open_parms *oparms)
63eb3def
PS		 1509{
1510 struct smb2_create_req *req = iov[0].iov_base;
1511 unsigned int num = *num_iovec;
1512
b56eae4d
SF		 1513 /* indicate that we don't need to relock the file */
1514 oparms->reconnect = false;
1515
1516 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
1517 if (iov[num].iov_base == NULL)
1518 return -ENOMEM;
1519 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
1520 if (!req->CreateContextsOffset)
1521 req->CreateContextsOffset =
1522 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1523 iov[1].iov_len);
1524 le32_add_cpu(&req->CreateContextsLength,
1525 sizeof(struct create_durable_handle_reconnect_v2));
1526 inc_rfc1001_len(&req->hdr,
1527 sizeof(struct create_durable_handle_reconnect_v2));
1528 *num_iovec = num + 1;
1529 return 0;
1530}
1531
1532static int
1533add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1534 struct cifs_open_parms *oparms, bool use_persistent)
1535{
1536 struct smb2_create_req *req = iov[0].iov_base;
1537 unsigned int num = *num_iovec;
1538
1539 if (use_persistent) {
1540 if (oparms->reconnect)
1541 return add_durable_reconnect_v2_context(iov, num_iovec,
1542 oparms);
1543 else
1544 return add_durable_v2_context(iov, num_iovec, oparms);
1545 }
1546
9cbc0b73
PS		 1547 if (oparms->reconnect) {
1548 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1549 /* indicate that we don't need to relock the file */
1550 oparms->reconnect = false;
1551 } else
1552 iov[num].iov_base = create_durable_buf();
63eb3def
PS		 1553 if (iov[num].iov_base == NULL)
1554 return -ENOMEM;
1555 iov[num].iov_len = sizeof(struct create_durable);
1556 if (!req->CreateContextsOffset)
1557 req->CreateContextsOffset =
1558 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1559 iov[1].iov_len);
31f92e9a 1560 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
63eb3def
PS		 1561 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
1562 *num_iovec = num + 1;
1563 return 0;
1564}
1565
f0712928
AA		 1566static int
1567alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
1568 const char *treename, const __le16 *path)
1569{
1570 int treename_len, path_len;
1571 struct nls_table *cp;
1572 const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
1573
1574 /*
1575 * skip leading "\\"
1576 */
1577 treename_len = strlen(treename);
1578 if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\'))
1579 return -EINVAL;
1580
1581 treename += 2;
1582 treename_len -= 2;
1583
1584 path_len = UniStrnlen((wchar_t *)path, PATH_MAX);
1585
1586 /*
1587 * make room for one path separator between the treename and
1588 * path
1589 */
1590 *out_len = treename_len + 1 + path_len;
1591
1592 /*
1593 * final path needs to be null-terminated UTF16 with a
1594 * size aligned to 8
1595 */
1596
1597 *out_size = roundup((*out_len+1)*2, 8);
1598 *out_path = kzalloc(*out_size, GFP_KERNEL);
1599 if (!*out_path)
1600 return -ENOMEM;
1601
1602 cp = load_nls_default();
1603 cifs_strtoUTF16(*out_path, treename, treename_len, cp);
1604 UniStrcat(*out_path, sep);
1605 UniStrcat(*out_path, path);
1606 unload_nls(cp);
1607
1608 return 0;
1609}
1610
2503a0db 1611int
064f6047 1612SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
b42bf888
PS		 1613 __u8 *oplock, struct smb2_file_all_info *buf,
1614 struct smb2_err_rsp **err_buf)
2503a0db
PS		 1615{
1616 struct smb2_create_req *req;
1617 struct smb2_create_rsp *rsp;
1618 struct TCP_Server_Info *server;
064f6047 1619 struct cifs_tcon *tcon = oparms->tcon;
2503a0db 1620 struct cifs_ses *ses = tcon->ses;
63eb3def 1621 struct kvec iov[4];
da502f7d 1622 struct kvec rsp_iov;
2503a0db
PS		 1623 int resp_buftype;
1624 int uni_path_len;
b8c32dbb
PS		 1625 __le16 *copy_path = NULL;
1626 int copy_size;
2503a0db 1627 int rc = 0;
da502f7d 1628 unsigned int n_iov = 2;
ca81983f 1629 __u32 file_attributes = 0;
663a9621 1630 char *dhc_buf = NULL, *lc_buf = NULL;
7fb8986e 1631 int flags = 0;
2503a0db 1632
f96637be 1633 cifs_dbg(FYI, "create/open\n");
2503a0db
PS		 1634
1635 if (ses && (ses->server))
1636 server = ses->server;
1637 else
1638 return -EIO;
1639
1640 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
1641 if (rc)
1642 return rc;
1643
7fb8986e
PS		 1644 if (encryption_required(tcon))
1645 flags |= CIFS_TRANSFORM_REQ;
1646
064f6047 1647 if (oparms->create_options & CREATE_OPTION_READONLY)
ca81983f 1648 file_attributes |= ATTR_READONLY;
db8b631d
SF		 1649 if (oparms->create_options & CREATE_OPTION_SPECIAL)
1650 file_attributes |= ATTR_SYSTEM;
ca81983f 1651
2503a0db 1652 req->ImpersonationLevel = IL_IMPERSONATION;
064f6047 1653 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
2503a0db
PS		 1654 /* File attributes ignored on open (used in create though) */
1655 req->FileAttributes = cpu_to_le32(file_attributes);
1656 req->ShareAccess = FILE_SHARE_ALL_LE;
064f6047
PS		 1657 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1658 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
2503a0db
PS		 1659
1660 iov[0].iov_base = (char *)req;
1661 /* 4 for rfc1002 length field */
1662 iov[0].iov_len = get_rfc1002_length(req) + 4;
59aa3718
PS		 1663 /* -1 since last byte is buf[0] which is sent below (path) */
1664 iov[0].iov_len--;
f0712928
AA		 1665
1666 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
1667
1668 /* [MS-SMB2] 2.2.13 NameOffset:
1669 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
1670 * the SMB2 header, the file name includes a prefix that will
1671 * be processed during DFS name normalization as specified in
1672 * section 3.3.5.9. Otherwise, the file name is relative to
1673 * the share that is identified by the TreeId in the SMB2
1674 * header.
1675 */
1676 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
1677 int name_len;
1678
1679 req->hdr.sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
1680 rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
1681 &name_len,
1682 tcon->treeName, path);
1683 if (rc)
1684 return rc;
1685 req->NameLength = cpu_to_le16(name_len * 2);
59aa3718
PS		 1686 uni_path_len = copy_size;
1687 path = copy_path;
f0712928
AA		 1688 } else {
1689 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
1690 /* MUST set path len (NameLength) to 0 opening root of share */
1691 req->NameLength = cpu_to_le16(uni_path_len - 2);
1692 if (uni_path_len % 8 != 0) {
1693 copy_size = roundup(uni_path_len, 8);
1694 copy_path = kzalloc(copy_size, GFP_KERNEL);
1695 if (!copy_path)
1696 return -ENOMEM;
1697 memcpy((char *)copy_path, (const char *)path,
1698 uni_path_len);
1699 uni_path_len = copy_size;
1700 path = copy_path;
1701 }
2503a0db
PS		 1702 }
1703
59aa3718
PS		 1704 iov[1].iov_len = uni_path_len;
1705 iov[1].iov_base = path;
1706 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1707 inc_rfc1001_len(req, uni_path_len - 1);
1708
b8c32dbb
PS		 1709 if (!server->oplocks)
1710 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1711
a41a28bd 1712 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
b8c32dbb
PS		 1713 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1714 req->RequestedOplockLevel = *oplock;
1715 else {
da502f7d 1716 rc = add_lease_context(server, iov, &n_iov, oplock);
d22cbfec 1717 if (rc) {
b8c32dbb
PS		 1718 cifs_small_buf_release(req);
1719 kfree(copy_path);
d22cbfec 1720 return rc;
b8c32dbb 1721 }
da502f7d 1722 lc_buf = iov[n_iov-1].iov_base;
b8c32dbb
PS		 1723 }
1724
63eb3def
PS		 1725 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1726 /* need to set Next field of lease context if we request it */
a41a28bd 1727 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
63eb3def 1728 struct create_context *ccontext =
da502f7d 1729 (struct create_context *)iov[n_iov-1].iov_base;
1c46943f 1730 ccontext->Next =
a41a28bd 1731 cpu_to_le32(server->vals->create_lease_size);
63eb3def 1732 }
b56eae4d 1733
da502f7d 1734 rc = add_durable_context(iov, &n_iov, oparms,
b56eae4d 1735 tcon->use_persistent);
63eb3def
PS		 1736 if (rc) {
1737 cifs_small_buf_release(req);
1738 kfree(copy_path);
663a9621 1739 kfree(lc_buf);
63eb3def
PS		 1740 return rc;
1741 }
da502f7d 1742 dhc_buf = iov[n_iov-1].iov_base;
63eb3def
PS		 1743 }
1744
7fb8986e 1745 rc = SendReceive2(xid, ses, iov, n_iov, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1746 cifs_small_buf_release(req);
1747 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2503a0db
PS		 1748
1749 if (rc != 0) {
1750 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
b42bf888
PS		 1751 if (err_buf)
1752 *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
1753 GFP_KERNEL);
2503a0db
PS		 1754 goto creat_exit;
1755 }
1756
064f6047
PS		 1757 oparms->fid->persistent_fid = rsp->PersistentFileId;
1758 oparms->fid->volatile_fid = rsp->VolatileFileId;
f0df737e
PS		 1759
1760 if (buf) {
1761 memcpy(buf, &rsp->CreationTime, 32);
1762 buf->AllocationSize = rsp->AllocationSize;
1763 buf->EndOfFile = rsp->EndofFile;
1764 buf->Attributes = rsp->FileAttributes;
1765 buf->NumberOfLinks = cpu_to_le32(1);
1766 buf->DeletePending = 0;
1767 }
2e44b288 1768
b8c32dbb 1769 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
42873b0a 1770 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
b8c32dbb
PS		 1771 else
1772 *oplock = rsp->OplockLevel;
2503a0db 1773creat_exit:
b8c32dbb 1774 kfree(copy_path);
663a9621
PS		 1775 kfree(lc_buf);
1776 kfree(dhc_buf);
2503a0db
PS		 1777 free_rsp_buf(resp_buftype, rsp);
1778 return rc;
1779}
1780
4a72dafa
SF		 1781/*
1782 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1783 */
1784int
1785SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
51146625
AA		 1786 u64 volatile_fid, u32 opcode, bool is_fsctl, bool use_ipc,
1787 char *in_data, u32 indatalen,
1788 char **out_data, u32 *plen /* returned data len */)
4a72dafa
SF		 1789{
1790 struct smb2_ioctl_req *req;
1791 struct smb2_ioctl_rsp *rsp;
31473fc4 1792 struct smb2_sync_hdr *shdr;
4a72dafa 1793 struct TCP_Server_Info *server;
8e353106 1794 struct cifs_ses *ses;
4a72dafa 1795 struct kvec iov[2];
da502f7d 1796 struct kvec rsp_iov;
4a72dafa 1797 int resp_buftype;
da502f7d 1798 int n_iov;
4a72dafa 1799 int rc = 0;
7fb8986e 1800 int flags = 0;
4a72dafa
SF		 1801
1802 cifs_dbg(FYI, "SMB2 IOCTL\n");
1803
3d1a3745
SF		 1804 if (out_data != NULL)
1805 *out_data = NULL;
1806
4a72dafa
SF		 1807 /* zero out returned data len, in case of error */
1808 if (plen)
1809 *plen = 0;
1810
8e353106
SF		 1811 if (tcon)
1812 ses = tcon->ses;
1813 else
1814 return -EIO;
1815
4a72dafa
SF		 1816 if (ses && (ses->server))
1817 server = ses->server;
1818 else
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;
1976 struct TCP_Server_Info *server;
1977 struct cifs_ses *ses = tcon->ses;
1978 struct kvec iov[1];
da502f7d 1979 struct kvec rsp_iov;
2503a0db
PS		 1980 int resp_buftype;
1981 int rc = 0;
7fb8986e 1982 int flags = 0;
2503a0db 1983
f96637be 1984 cifs_dbg(FYI, "Close\n");
2503a0db
PS		 1985
1986 if (ses && (ses->server))
1987 server = ses->server;
1988 else
1989 return -EIO;
1990
1991 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1992 if (rc)
1993 return rc;
1994
7fb8986e
PS		 1995 if (encryption_required(tcon))
1996 flags |= CIFS_TRANSFORM_REQ;
1997
2503a0db
PS		 1998 req->PersistentFileId = persistent_fid;
1999 req->VolatileFileId = volatile_fid;
2000
2001 iov[0].iov_base = (char *)req;
2002 /* 4 for rfc1002 length field */
2003 iov[0].iov_len = get_rfc1002_length(req) + 4;
2004
7fb8986e 2005 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2006 cifs_small_buf_release(req);
2007 rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
2503a0db
PS		 2008
2009 if (rc != 0) {
d4a029d2 2010 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
2503a0db
PS		 2011 goto close_exit;
2012 }
2013
2503a0db
PS		 2014 /* BB FIXME - decode close response, update inode for caching */
2015
2016close_exit:
2017 free_rsp_buf(resp_buftype, rsp);
2018 return rc;
2019}
be4cb9e3
PS		 2020
2021static int
2022validate_buf(unsigned int offset, unsigned int buffer_length,
2023 struct smb2_hdr *hdr, unsigned int min_buf_size)
2024
2025{
2026 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
2027 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
2028 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
2029 char *end_of_buf = begin_of_buf + buffer_length;
2030
2031
2032 if (buffer_length < min_buf_size) {
f96637be
JP		 2033 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
2034 buffer_length, min_buf_size);
be4cb9e3
PS		 2035 return -EINVAL;
2036 }
2037
2038 /* check if beyond RFC1001 maximum length */
2039 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
f96637be
JP		 2040 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
2041 buffer_length, smb_len);
be4cb9e3
PS		 2042 return -EINVAL;
2043 }
2044
2045 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
f96637be 2046 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
be4cb9e3
PS		 2047 return -EINVAL;
2048 }
2049
2050 return 0;
2051}
2052
2053/*
2054 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2055 * Caller must free buffer.
2056 */
2057static int
2058validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
2059 struct smb2_hdr *hdr, unsigned int minbufsize,
2060 char *data)
2061
2062{
2063 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
2064 int rc;
2065
2066 if (!data)
2067 return -EINVAL;
2068
2069 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
2070 if (rc)
2071 return rc;
2072
2073 memcpy(data, begin_of_buf, buffer_length);
2074
2075 return 0;
2076}
2077
f0df737e
PS		 2078static int
2079query_info(const unsigned int xid, struct cifs_tcon *tcon,
2080 u64 persistent_fid, u64 volatile_fid, u8 info_class,
2081 size_t output_len, size_t min_len, void *data)
be4cb9e3
PS		 2082{
2083 struct smb2_query_info_req *req;
2084 struct smb2_query_info_rsp *rsp = NULL;
2085 struct kvec iov[2];
da502f7d 2086 struct kvec rsp_iov;
be4cb9e3
PS		 2087 int rc = 0;
2088 int resp_buftype;
2089 struct TCP_Server_Info *server;
2090 struct cifs_ses *ses = tcon->ses;
7fb8986e 2091 int flags = 0;
be4cb9e3 2092
f96637be 2093 cifs_dbg(FYI, "Query Info\n");
be4cb9e3
PS		 2094
2095 if (ses && (ses->server))
2096 server = ses->server;
2097 else
2098 return -EIO;
2099
2100 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2101 if (rc)
2102 return rc;
2103
7fb8986e
PS		 2104 if (encryption_required(tcon))
2105 flags |= CIFS_TRANSFORM_REQ;
2106
be4cb9e3 2107 req->InfoType = SMB2_O_INFO_FILE;
f0df737e 2108 req->FileInfoClass = info_class;
be4cb9e3
PS		 2109 req->PersistentFileId = persistent_fid;
2110 req->VolatileFileId = volatile_fid;
2111 /* 4 for rfc1002 length field and 1 for Buffer */
2112 req->InputBufferOffset =
2113 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
f0df737e 2114 req->OutputBufferLength = cpu_to_le32(output_len);
be4cb9e3
PS		 2115
2116 iov[0].iov_base = (char *)req;
2117 /* 4 for rfc1002 length field */
2118 iov[0].iov_len = get_rfc1002_length(req) + 4;
2119
7fb8986e 2120 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2121 cifs_small_buf_release(req);
2122 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
e5d04887 2123
be4cb9e3
PS		 2124 if (rc) {
2125 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2126 goto qinf_exit;
2127 }
2128
be4cb9e3
PS		 2129 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
2130 le32_to_cpu(rsp->OutputBufferLength),
f0df737e 2131 &rsp->hdr, min_len, data);
be4cb9e3
PS		 2132
2133qinf_exit:
2134 free_rsp_buf(resp_buftype, rsp);
2135 return rc;
2136}
9094fad1 2137
f0df737e
PS		 2138int
2139SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
2140 u64 persistent_fid, u64 volatile_fid,
2141 struct smb2_file_all_info *data)
2142{
2143 return query_info(xid, tcon, persistent_fid, volatile_fid,
2144 FILE_ALL_INFORMATION,
1bbe4997 2145 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
f0df737e
PS		 2146 sizeof(struct smb2_file_all_info), data);
2147}
2148
2149int
2150SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
2151 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
2152{
2153 return query_info(xid, tcon, persistent_fid, volatile_fid,
2154 FILE_INTERNAL_INFORMATION,
2155 sizeof(struct smb2_file_internal_info),
2156 sizeof(struct smb2_file_internal_info), uniqueid);
2157}
2158
9094fad1
PS		 2159/*
2160 * This is a no-op for now. We're not really interested in the reply, but
2161 * rather in the fact that the server sent one and that server->lstrp
2162 * gets updated.
2163 *
2164 * FIXME: maybe we should consider checking that the reply matches request?
2165 */
2166static void
2167smb2_echo_callback(struct mid_q_entry *mid)
2168{
2169 struct TCP_Server_Info *server = mid->callback_data;
31473fc4 2170 struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
9094fad1
PS		 2171 unsigned int credits_received = 1;
2172
2173 if (mid->mid_state == MID_RESPONSE_RECEIVED)
31473fc4 2174 credits_received = le16_to_cpu(rsp->hdr.sync_hdr.CreditRequest);
9094fad1
PS		 2175
2176 DeleteMidQEntry(mid);
2177 add_credits(server, credits_received, CIFS_ECHO_OP);
2178}
2179
53e0e11e
PS		 2180void smb2_reconnect_server(struct work_struct *work)
2181{
2182 struct TCP_Server_Info *server = container_of(work,
2183 struct TCP_Server_Info, reconnect.work);
2184 struct cifs_ses *ses;
2185 struct cifs_tcon *tcon, *tcon2;
2186 struct list_head tmp_list;
2187 int tcon_exist = false;
18ea4311
GP		 2188 int rc;
2189 int resched = false;
2190
53e0e11e
PS		 2191
2192 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2193 mutex_lock(&server->reconnect_mutex);
2194
2195 INIT_LIST_HEAD(&tmp_list);
2196 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
2197
2198 spin_lock(&cifs_tcp_ses_lock);
2199 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2200 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
96a988ff 2201 if (tcon->need_reconnect || tcon->need_reopen_files) {
53e0e11e
PS		 2202 tcon->tc_count++;
2203 list_add_tail(&tcon->rlist, &tmp_list);
2204 tcon_exist = true;
2205 }
2206 }
2207 }
2208 /*
2209 * Get the reference to server struct to be sure that the last call of
2210 * cifs_put_tcon() in the loop below won't release the server pointer.
2211 */
2212 if (tcon_exist)
2213 server->srv_count++;
2214
2215 spin_unlock(&cifs_tcp_ses_lock);
2216
2217 list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
18ea4311
GP		 2218 rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon);
2219 if (!rc)
96a988ff 2220 cifs_reopen_persistent_handles(tcon);
18ea4311
GP		 2221 else
2222 resched = true;
53e0e11e
PS		 2223 list_del_init(&tcon->rlist);
2224 cifs_put_tcon(tcon);
2225 }
2226
2227 cifs_dbg(FYI, "Reconnecting tcons finished\n");
18ea4311
GP		 2228 if (resched)
2229 queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
53e0e11e
PS		 2230 mutex_unlock(&server->reconnect_mutex);
2231
2232 /* now we can safely release srv struct */
2233 if (tcon_exist)
2234 cifs_put_tcp_session(server, 1);
2235}
2236
9094fad1
PS		 2237int
2238SMB2_echo(struct TCP_Server_Info *server)
2239{
2240 struct smb2_echo_req *req;
2241 int rc = 0;
738f9de5
PS		 2242 struct kvec iov[2];
2243 struct smb_rqst rqst = { .rq_iov = iov,
2244 .rq_nvec = 2 };
9094fad1 2245
f96637be 2246 cifs_dbg(FYI, "In echo request\n");
9094fad1 2247
4fcd1813 2248 if (server->tcpStatus == CifsNeedNegotiate) {
53e0e11e
PS		 2249 /* No need to send echo on newly established connections */
2250 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
2251 return rc;
4fcd1813
SF		 2252 }
2253
9094fad1
PS		 2254 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
2255 if (rc)
2256 return rc;
2257
31473fc4 2258 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
9094fad1 2259
9094fad1 2260 /* 4 for rfc1002 length field */
738f9de5
PS		 2261 iov[0].iov_len = 4;
2262 iov[0].iov_base = (char *)req;
2263 iov[1].iov_len = get_rfc1002_length(req);
2264 iov[1].iov_base = (char *)req + 4;
9094fad1 2265
9b7c18a2
PS		 2266 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
2267 server, CIFS_ECHO_OP);
9094fad1 2268 if (rc)
f96637be 2269 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
9094fad1
PS		 2270
2271 cifs_small_buf_release(req);
2272 return rc;
2273}
7a5cfb19
PS		 2274
2275int
2276SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2277 u64 volatile_fid)
2278{
2279 struct smb2_flush_req *req;
2280 struct TCP_Server_Info *server;
2281 struct cifs_ses *ses = tcon->ses;
2282 struct kvec iov[1];
da502f7d 2283 struct kvec rsp_iov;
7a5cfb19
PS		 2284 int resp_buftype;
2285 int rc = 0;
7fb8986e 2286 int flags = 0;
7a5cfb19 2287
f96637be 2288 cifs_dbg(FYI, "Flush\n");
7a5cfb19
PS		 2289
2290 if (ses && (ses->server))
2291 server = ses->server;
2292 else
2293 return -EIO;
2294
2295 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
2296 if (rc)
2297 return rc;
2298
7fb8986e
PS		 2299 if (encryption_required(tcon))
2300 flags |= CIFS_TRANSFORM_REQ;
2301
7a5cfb19
PS		 2302 req->PersistentFileId = persistent_fid;
2303 req->VolatileFileId = volatile_fid;
2304
2305 iov[0].iov_base = (char *)req;
2306 /* 4 for rfc1002 length field */
2307 iov[0].iov_len = get_rfc1002_length(req) + 4;
2308
7fb8986e 2309 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d 2310 cifs_small_buf_release(req);
7a5cfb19 2311
dfebe400 2312 if (rc != 0)
7a5cfb19
PS		 2313 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
2314
da502f7d 2315 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
7a5cfb19
PS		 2316 return rc;
2317}
09a4707e
PS		 2318
2319/*
2320 * To form a chain of read requests, any read requests after the first should
2321 * have the end_of_chain boolean set to true.
2322 */
2323static int
738f9de5
PS		 2324smb2_new_read_req(void **buf, unsigned int *total_len,
2325 struct cifs_io_parms *io_parms, unsigned int remaining_bytes,
2326 int request_type)
09a4707e
PS		 2327{
2328 int rc = -EACCES;
b8f57ee8 2329 struct smb2_read_plain_req *req = NULL;
31473fc4 2330 struct smb2_sync_hdr *shdr;
09a4707e 2331
b8f57ee8
PS		 2332 rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
2333 total_len);
09a4707e
PS		 2334 if (rc)
2335 return rc;
2336 if (io_parms->tcon->ses->server == NULL)
2337 return -ECONNABORTED;
2338
b8f57ee8 2339 shdr = &req->sync_hdr;
31473fc4 2340 shdr->ProcessId = cpu_to_le32(io_parms->pid);
09a4707e
PS		 2341
2342 req->PersistentFileId = io_parms->persistent_fid;
2343 req->VolatileFileId = io_parms->volatile_fid;
2344 req->ReadChannelInfoOffset = 0; /* reserved */
2345 req->ReadChannelInfoLength = 0; /* reserved */
2346 req->Channel = 0; /* reserved */
2347 req->MinimumCount = 0;
2348 req->Length = cpu_to_le32(io_parms->length);
2349 req->Offset = cpu_to_le64(io_parms->offset);
2350
2351 if (request_type & CHAINED_REQUEST) {
2352 if (!(request_type & END_OF_CHAIN)) {
b8f57ee8
PS		 2353 /* next 8-byte aligned request */
2354 *total_len = DIV_ROUND_UP(*total_len, 8) * 8;
2355 shdr->NextCommand = cpu_to_le32(*total_len);
09a4707e 2356 } else /* END_OF_CHAIN */
31473fc4 2357 shdr->NextCommand = 0;
09a4707e 2358 if (request_type & RELATED_REQUEST) {
31473fc4 2359 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
09a4707e
PS		 2360 /*
2361 * Related requests use info from previous read request
2362 * in chain.
2363 */
31473fc4
PS		 2364 shdr->SessionId = 0xFFFFFFFF;
2365 shdr->TreeId = 0xFFFFFFFF;
09a4707e
PS		 2366 req->PersistentFileId = 0xFFFFFFFF;
2367 req->VolatileFileId = 0xFFFFFFFF;
2368 }
2369 }
2370 if (remaining_bytes > io_parms->length)
2371 req->RemainingBytes = cpu_to_le32(remaining_bytes);
2372 else
2373 req->RemainingBytes = 0;
2374
738f9de5 2375 *buf = req;
09a4707e
PS		 2376 return rc;
2377}
2378
2379static void
2380smb2_readv_callback(struct mid_q_entry *mid)
2381{
2382 struct cifs_readdata *rdata = mid->callback_data;
2383 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
2384 struct TCP_Server_Info *server = tcon->ses->server;
738f9de5
PS		 2385 struct smb2_sync_hdr *shdr =
2386 (struct smb2_sync_hdr *)rdata->iov[1].iov_base;
09a4707e 2387 unsigned int credits_received = 1;
738f9de5
PS		 2388 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2389 .rq_nvec = 2,
8321fec4
JL		 2390 .rq_pages = rdata->pages,
2391 .rq_npages = rdata->nr_pages,
2392 .rq_pagesz = rdata->pagesz,
2393 .rq_tailsz = rdata->tailsz };
09a4707e 2394
f96637be
JP		 2395 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2396 __func__, mid->mid, mid->mid_state, rdata->result,
2397 rdata->bytes);
09a4707e
PS		 2398
2399 switch (mid->mid_state) {
2400 case MID_RESPONSE_RECEIVED:
31473fc4 2401 credits_received = le16_to_cpu(shdr->CreditRequest);
09a4707e 2402 /* result already set, check signature */
4326ed2f 2403 if (server->sign && !mid->decrypted) {
3c1bf7e4
PS		 2404 int rc;
2405
0b688cfc 2406 rc = smb2_verify_signature(&rqst, server);
3c1bf7e4 2407 if (rc)
f96637be
JP		 2408 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
2409 rc);
3c1bf7e4 2410 }
09a4707e 2411 /* FIXME: should this be counted toward the initiating task? */
34a54d61
PS		 2412 task_io_account_read(rdata->got_bytes);
2413 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 2414 break;
2415 case MID_REQUEST_SUBMITTED:
2416 case MID_RETRY_NEEDED:
2417 rdata->result = -EAGAIN;
d913ed17
PS		 2418 if (server->sign && rdata->got_bytes)
2419 /* reset bytes number since we can not check a sign */
2420 rdata->got_bytes = 0;
2421 /* FIXME: should this be counted toward the initiating task? */
2422 task_io_account_read(rdata->got_bytes);
2423 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 2424 break;
2425 default:
2426 if (rdata->result != -ENODATA)
2427 rdata->result = -EIO;
2428 }
2429
2430 if (rdata->result)
2431 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
2432
2433 queue_work(cifsiod_wq, &rdata->work);
2434 DeleteMidQEntry(mid);
2435 add_credits(server, credits_received, 0);
2436}
2437
738f9de5 2438/* smb2_async_readv - send an async read, and set up mid to handle result */
09a4707e
PS		 2439int
2440smb2_async_readv(struct cifs_readdata *rdata)
2441{
bed9da02 2442 int rc, flags = 0;
31473fc4
PS		 2443 char *buf;
2444 struct smb2_sync_hdr *shdr;
09a4707e 2445 struct cifs_io_parms io_parms;
738f9de5
PS		 2446 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2447 .rq_nvec = 2 };
bed9da02 2448 struct TCP_Server_Info *server;
738f9de5 2449 unsigned int total_len;
b8f57ee8 2450 __be32 req_len;
09a4707e 2451
f96637be
JP		 2452 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
2453 __func__, rdata->offset, rdata->bytes);
09a4707e
PS		 2454
2455 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
2456 io_parms.offset = rdata->offset;
2457 io_parms.length = rdata->bytes;
2458 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
2459 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
2460 io_parms.pid = rdata->pid;
bed9da02
PS		 2461
2462 server = io_parms.tcon->ses->server;
2463
738f9de5 2464 rc = smb2_new_read_req((void **) &buf, &total_len, &io_parms, 0, 0);
bed9da02
PS		 2465 if (rc) {
2466 if (rc == -EAGAIN && rdata->credits) {
2467 /* credits was reset by reconnect */
2468 rdata->credits = 0;
2469 /* reduce in_flight value since we won't send the req */
2470 spin_lock(&server->req_lock);
2471 server->in_flight--;
2472 spin_unlock(&server->req_lock);
2473 }
09a4707e 2474 return rc;
bed9da02 2475 }
09a4707e 2476
7fb8986e
PS		 2477 if (encryption_required(io_parms.tcon))
2478 flags |= CIFS_TRANSFORM_REQ;
2479
b8f57ee8
PS		 2480 req_len = cpu_to_be32(total_len);
2481
2482 rdata->iov[0].iov_base = &req_len;
2483 rdata->iov[0].iov_len = sizeof(__be32);
2484 rdata->iov[1].iov_base = buf;
2485 rdata->iov[1].iov_len = total_len;
2486
2487 shdr = (struct smb2_sync_hdr *)buf;
09a4707e 2488
bed9da02 2489 if (rdata->credits) {
31473fc4 2490 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
bed9da02 2491 SMB2_MAX_BUFFER_SIZE));
31473fc4 2492 shdr->CreditRequest = shdr->CreditCharge;
bed9da02
PS		 2493 spin_lock(&server->req_lock);
2494 server->credits += rdata->credits -
31473fc4 2495 le16_to_cpu(shdr->CreditCharge);
bed9da02
PS		 2496 spin_unlock(&server->req_lock);
2497 wake_up(&server->request_q);
7fb8986e 2498 flags |= CIFS_HAS_CREDITS;
bed9da02
PS		 2499 }
2500
09a4707e 2501 kref_get(&rdata->refcount);
fec344e3 2502 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
09a4707e 2503 cifs_readv_receive, smb2_readv_callback,
4326ed2f 2504 smb3_handle_read_data, rdata, flags);
e5d04887 2505 if (rc) {
09a4707e 2506 kref_put(&rdata->refcount, cifs_readdata_release);
e5d04887
PS		 2507 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
2508 }
09a4707e
PS		 2509
2510 cifs_small_buf_release(buf);
2511 return rc;
2512}
33319141 2513
d8e05039
PS		 2514int
2515SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
2516 unsigned int *nbytes, char **buf, int *buf_type)
2517{
2518 int resp_buftype, rc = -EACCES;
b8f57ee8 2519 struct smb2_read_plain_req *req = NULL;
d8e05039 2520 struct smb2_read_rsp *rsp = NULL;
31473fc4 2521 struct smb2_sync_hdr *shdr;
b8f57ee8 2522 struct kvec iov[2];
da502f7d 2523 struct kvec rsp_iov;
738f9de5 2524 unsigned int total_len;
b8f57ee8
PS		 2525 __be32 req_len;
2526 struct smb_rqst rqst = { .rq_iov = iov,
2527 .rq_nvec = 2 };
7fb8986e
PS		 2528 int flags = CIFS_LOG_ERROR;
2529 struct cifs_ses *ses = io_parms->tcon->ses;
d8e05039
PS		 2530
2531 *nbytes = 0;
738f9de5 2532 rc = smb2_new_read_req((void **)&req, &total_len, io_parms, 0, 0);
d8e05039
PS		 2533 if (rc)
2534 return rc;
2535
7fb8986e
PS		 2536 if (encryption_required(io_parms->tcon))
2537 flags |= CIFS_TRANSFORM_REQ;
2538
b8f57ee8 2539 req_len = cpu_to_be32(total_len);
738f9de5 2540
b8f57ee8
PS		 2541 iov[0].iov_base = &req_len;
2542 iov[0].iov_len = sizeof(__be32);
2543 iov[1].iov_base = req;
2544 iov[1].iov_len = total_len;
2545
7fb8986e 2546 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
b8f57ee8 2547 cifs_small_buf_release(req);
d8e05039 2548
da502f7d 2549 rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
31473fc4 2550 shdr = get_sync_hdr(rsp);
d8e05039 2551
31473fc4 2552 if (shdr->Status == STATUS_END_OF_FILE) {
da502f7d 2553 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
d8e05039
PS		 2554 return 0;
2555 }
2556
2557 if (rc) {
2558 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
f96637be 2559 cifs_dbg(VFS, "Send error in read = %d\n", rc);
d8e05039
PS		 2560 } else {
2561 *nbytes = le32_to_cpu(rsp->DataLength);
2562 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
2563 (*nbytes > io_parms->length)) {
f96637be
JP		 2564 cifs_dbg(FYI, "bad length %d for count %d\n",
2565 *nbytes, io_parms->length);
d8e05039
PS		 2566 rc = -EIO;
2567 *nbytes = 0;
2568 }
2569 }
2570
2571 if (*buf) {
31473fc4 2572 memcpy(*buf, (char *)shdr + rsp->DataOffset, *nbytes);
da502f7d 2573 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
d8e05039 2574 } else if (resp_buftype != CIFS_NO_BUFFER) {
da502f7d 2575 *buf = rsp_iov.iov_base;
d8e05039
PS		 2576 if (resp_buftype == CIFS_SMALL_BUFFER)
2577 *buf_type = CIFS_SMALL_BUFFER;
2578 else if (resp_buftype == CIFS_LARGE_BUFFER)
2579 *buf_type = CIFS_LARGE_BUFFER;
2580 }
2581 return rc;
2582}
2583
33319141
PS		 2584/*
2585 * Check the mid_state and signature on received buffer (if any), and queue the
2586 * workqueue completion task.
2587 */
2588static void
2589smb2_writev_callback(struct mid_q_entry *mid)
2590{
2591 struct cifs_writedata *wdata = mid->callback_data;
2592 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
2593 unsigned int written;
2594 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
2595 unsigned int credits_received = 1;
2596
2597 switch (mid->mid_state) {
2598 case MID_RESPONSE_RECEIVED:
31473fc4 2599 credits_received = le16_to_cpu(rsp->hdr.sync_hdr.CreditRequest);
33319141
PS		 2600 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
2601 if (wdata->result != 0)
2602 break;
2603
2604 written = le32_to_cpu(rsp->DataLength);
2605 /*
2606 * Mask off high 16 bits when bytes written as returned
2607 * by the server is greater than bytes requested by the
2608 * client. OS/2 servers are known to set incorrect
2609 * CountHigh values.
2610 */
2611 if (written > wdata->bytes)
2612 written &= 0xFFFF;
2613
2614 if (written < wdata->bytes)
2615 wdata->result = -ENOSPC;
2616 else
2617 wdata->bytes = written;
2618 break;
2619 case MID_REQUEST_SUBMITTED:
2620 case MID_RETRY_NEEDED:
2621 wdata->result = -EAGAIN;
2622 break;
2623 default:
2624 wdata->result = -EIO;
2625 break;
2626 }
2627
2628 if (wdata->result)
2629 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2630
2631 queue_work(cifsiod_wq, &wdata->work);
2632 DeleteMidQEntry(mid);
2633 add_credits(tcon->ses->server, credits_received, 0);
2634}
2635
2636/* smb2_async_writev - send an async write, and set up mid to handle result */
2637int
4a5c80d7
SF		 2638smb2_async_writev(struct cifs_writedata *wdata,
2639 void (*release)(struct kref *kref))
33319141 2640{
cb7e9eab 2641 int rc = -EACCES, flags = 0;
33319141 2642 struct smb2_write_req *req = NULL;
31473fc4 2643 struct smb2_sync_hdr *shdr;
33319141 2644 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
cb7e9eab 2645 struct TCP_Server_Info *server = tcon->ses->server;
738f9de5
PS		 2646 struct kvec iov[2];
2647 struct smb_rqst rqst = { };
33319141
PS		 2648
2649 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
cb7e9eab
PS		 2650 if (rc) {
2651 if (rc == -EAGAIN && wdata->credits) {
2652 /* credits was reset by reconnect */
2653 wdata->credits = 0;
2654 /* reduce in_flight value since we won't send the req */
2655 spin_lock(&server->req_lock);
2656 server->in_flight--;
2657 spin_unlock(&server->req_lock);
2658 }
33319141 2659 goto async_writev_out;
cb7e9eab 2660 }
33319141 2661
7fb8986e
PS		 2662 if (encryption_required(tcon))
2663 flags |= CIFS_TRANSFORM_REQ;
2664
31473fc4
PS		 2665 shdr = get_sync_hdr(req);
2666 shdr->ProcessId = cpu_to_le32(wdata->cfile->pid);
33319141
PS		 2667
2668 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
2669 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
2670 req->WriteChannelInfoOffset = 0;
2671 req->WriteChannelInfoLength = 0;
2672 req->Channel = 0;
2673 req->Offset = cpu_to_le64(wdata->offset);
2674 /* 4 for rfc1002 length field */
2675 req->DataOffset = cpu_to_le16(
2676 offsetof(struct smb2_write_req, Buffer) - 4);
2677 req->RemainingBytes = 0;
2678
2679 /* 4 for rfc1002 length field and 1 for Buffer */
738f9de5
PS		 2680 iov[0].iov_len = 4;
2681 iov[0].iov_base = req;
2682 iov[1].iov_len = get_rfc1002_length(req) - 1;
2683 iov[1].iov_base = (char *)req + 4;
33319141 2684
738f9de5
PS		 2685 rqst.rq_iov = iov;
2686 rqst.rq_nvec = 2;
eddb079d
JL		 2687 rqst.rq_pages = wdata->pages;
2688 rqst.rq_npages = wdata->nr_pages;
2689 rqst.rq_pagesz = wdata->pagesz;
2690 rqst.rq_tailsz = wdata->tailsz;
33319141 2691
f96637be
JP		 2692 cifs_dbg(FYI, "async write at %llu %u bytes\n",
2693 wdata->offset, wdata->bytes);
33319141
PS		 2694
2695 req->Length = cpu_to_le32(wdata->bytes);
2696
2697 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
2698
cb7e9eab 2699 if (wdata->credits) {
31473fc4 2700 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
cb7e9eab 2701 SMB2_MAX_BUFFER_SIZE));
31473fc4 2702 shdr->CreditRequest = shdr->CreditCharge;
cb7e9eab
PS		 2703 spin_lock(&server->req_lock);
2704 server->credits += wdata->credits -
31473fc4 2705 le16_to_cpu(shdr->CreditCharge);
cb7e9eab
PS		 2706 spin_unlock(&server->req_lock);
2707 wake_up(&server->request_q);
7fb8986e 2708 flags |= CIFS_HAS_CREDITS;
cb7e9eab
PS		 2709 }
2710
33319141 2711 kref_get(&wdata->refcount);
9b7c18a2
PS		 2712 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
2713 wdata, flags);
33319141 2714
e5d04887 2715 if (rc) {
4a5c80d7 2716 kref_put(&wdata->refcount, release);
e5d04887
PS		 2717 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2718 }
33319141 2719
33319141
PS		 2720async_writev_out:
2721 cifs_small_buf_release(req);
33319141
PS		 2722 return rc;
2723}
009d3443
PS		 2724
2725/*
2726 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2727 * The length field from io_parms must be at least 1 and indicates a number of
2728 * elements with data to write that begins with position 1 in iov array. All
2729 * data length is specified by count.
2730 */
2731int
2732SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
2733 unsigned int *nbytes, struct kvec *iov, int n_vec)
2734{
2735 int rc = 0;
2736 struct smb2_write_req *req = NULL;
2737 struct smb2_write_rsp *rsp = NULL;
2738 int resp_buftype;
da502f7d 2739 struct kvec rsp_iov;
7fb8986e 2740 int flags = 0;
da502f7d 2741
009d3443
PS		 2742 *nbytes = 0;
2743
2744 if (n_vec < 1)
2745 return rc;
2746
2747 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
2748 if (rc)
2749 return rc;
2750
2751 if (io_parms->tcon->ses->server == NULL)
2752 return -ECONNABORTED;
2753
7fb8986e
PS		 2754 if (encryption_required(io_parms->tcon))
2755 flags |= CIFS_TRANSFORM_REQ;
2756
31473fc4 2757 req->hdr.sync_hdr.ProcessId = cpu_to_le32(io_parms->pid);
009d3443
PS		 2758
2759 req->PersistentFileId = io_parms->persistent_fid;
2760 req->VolatileFileId = io_parms->volatile_fid;
2761 req->WriteChannelInfoOffset = 0;
2762 req->WriteChannelInfoLength = 0;
2763 req->Channel = 0;
2764 req->Length = cpu_to_le32(io_parms->length);
2765 req->Offset = cpu_to_le64(io_parms->offset);
2766 /* 4 for rfc1002 length field */
2767 req->DataOffset = cpu_to_le16(
2768 offsetof(struct smb2_write_req, Buffer) - 4);
2769 req->RemainingBytes = 0;
2770
2771 iov[0].iov_base = (char *)req;
2772 /* 4 for rfc1002 length field and 1 for Buffer */
2773 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2774
2775 /* length of entire message including data to be written */
2776 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
2777
2778 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
7fb8986e 2779 &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2780 cifs_small_buf_release(req);
2781 rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
009d3443
PS		 2782
2783 if (rc) {
2784 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
f96637be 2785 cifs_dbg(VFS, "Send error in write = %d\n", rc);
e5d04887 2786 } else
009d3443 2787 *nbytes = le32_to_cpu(rsp->DataLength);
e5d04887
PS		 2788
2789 free_rsp_buf(resp_buftype, rsp);
009d3443
PS		 2790 return rc;
2791}
35143eb5 2792
d324f08d
PS		 2793static unsigned int
2794num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
2795{
2796 int len;
2797 unsigned int entrycount = 0;
2798 unsigned int next_offset = 0;
2799 FILE_DIRECTORY_INFO *entryptr;
2800
2801 if (bufstart == NULL)
2802 return 0;
2803
2804 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
2805
2806 while (1) {
2807 entryptr = (FILE_DIRECTORY_INFO *)
2808 ((char *)entryptr + next_offset);
2809
2810 if ((char *)entryptr + size > end_of_buf) {
f96637be 2811 cifs_dbg(VFS, "malformed search entry would overflow\n");
d324f08d
PS		 2812 break;
2813 }
2814
2815 len = le32_to_cpu(entryptr->FileNameLength);
2816 if ((char *)entryptr + len + size > end_of_buf) {
f96637be
JP		 2817 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
2818 end_of_buf);
d324f08d
PS		 2819 break;
2820 }
2821
2822 *lastentry = (char *)entryptr;
2823 entrycount++;
2824
2825 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
2826 if (!next_offset)
2827 break;
2828 }
2829
2830 return entrycount;
2831}
2832
2833/*
2834 * Readdir/FindFirst
2835 */
2836int
2837SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
2838 u64 persistent_fid, u64 volatile_fid, int index,
2839 struct cifs_search_info *srch_inf)
2840{
2841 struct smb2_query_directory_req *req;
2842 struct smb2_query_directory_rsp *rsp = NULL;
2843 struct kvec iov[2];
da502f7d 2844 struct kvec rsp_iov;
d324f08d
PS		 2845 int rc = 0;
2846 int len;
75fdfc84 2847 int resp_buftype = CIFS_NO_BUFFER;
d324f08d
PS		 2848 unsigned char *bufptr;
2849 struct TCP_Server_Info *server;
2850 struct cifs_ses *ses = tcon->ses;
2851 __le16 asteriks = cpu_to_le16('*');
2852 char *end_of_smb;
2853 unsigned int output_size = CIFSMaxBufSize;
2854 size_t info_buf_size;
7fb8986e 2855 int flags = 0;
d324f08d
PS		 2856
2857 if (ses && (ses->server))
2858 server = ses->server;
2859 else
2860 return -EIO;
2861
2862 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
2863 if (rc)
2864 return rc;
2865
7fb8986e
PS		 2866 if (encryption_required(tcon))
2867 flags |= CIFS_TRANSFORM_REQ;
2868
d324f08d
PS		 2869 switch (srch_inf->info_level) {
2870 case SMB_FIND_FILE_DIRECTORY_INFO:
2871 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
2872 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
2873 break;
2874 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
2875 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
2876 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
2877 break;
2878 default:
f96637be
JP		 2879 cifs_dbg(VFS, "info level %u isn't supported\n",
2880 srch_inf->info_level);
d324f08d
PS		 2881 rc = -EINVAL;
2882 goto qdir_exit;
2883 }
2884
2885 req->FileIndex = cpu_to_le32(index);
2886 req->PersistentFileId = persistent_fid;
2887 req->VolatileFileId = volatile_fid;
2888
2889 len = 0x2;
2890 bufptr = req->Buffer;
2891 memcpy(bufptr, &asteriks, len);
2892
2893 req->FileNameOffset =
2894 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
2895 req->FileNameLength = cpu_to_le16(len);
2896 /*
2897 * BB could be 30 bytes or so longer if we used SMB2 specific
2898 * buffer lengths, but this is safe and close enough.
2899 */
2900 output_size = min_t(unsigned int, output_size, server->maxBuf);
2901 output_size = min_t(unsigned int, output_size, 2 << 15);
2902 req->OutputBufferLength = cpu_to_le32(output_size);
2903
2904 iov[0].iov_base = (char *)req;
2905 /* 4 for RFC1001 length and 1 for Buffer */
2906 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2907
2908 iov[1].iov_base = (char *)(req->Buffer);
2909 iov[1].iov_len = len;
2910
2911 inc_rfc1001_len(req, len - 1 /* Buffer */);
2912
7fb8986e 2913 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2914 cifs_small_buf_release(req);
2915 rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
e5d04887 2916
d324f08d 2917 if (rc) {
31473fc4
PS		 2918 if (rc == -ENODATA &&
2919 rsp->hdr.sync_hdr.Status == STATUS_NO_MORE_FILES) {
52755808
PS		 2920 srch_inf->endOfSearch = true;
2921 rc = 0;
2922 }
d324f08d
PS		 2923 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
2924 goto qdir_exit;
2925 }
d324f08d
PS		 2926
2927 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2928 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2929 info_buf_size);
2930 if (rc)
2931 goto qdir_exit;
2932
2933 srch_inf->unicode = true;
2934
2935 if (srch_inf->ntwrk_buf_start) {
2936 if (srch_inf->smallBuf)
2937 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
2938 else
2939 cifs_buf_release(srch_inf->ntwrk_buf_start);
2940 }
2941 srch_inf->ntwrk_buf_start = (char *)rsp;
2942 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
2943 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
2944 /* 4 for rfc1002 length field */
2945 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
2946 srch_inf->entries_in_buffer =
2947 num_entries(srch_inf->srch_entries_start, end_of_smb,
2948 &srch_inf->last_entry, info_buf_size);
2949 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
f96637be
JP		 2950 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
2951 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
2952 srch_inf->srch_entries_start, srch_inf->last_entry);
d324f08d
PS		 2953 if (resp_buftype == CIFS_LARGE_BUFFER)
2954 srch_inf->smallBuf = false;
2955 else if (resp_buftype == CIFS_SMALL_BUFFER)
2956 srch_inf->smallBuf = true;
2957 else
f96637be 2958 cifs_dbg(VFS, "illegal search buffer type\n");
d324f08d 2959
d324f08d
PS		 2960 return rc;
2961
2962qdir_exit:
2963 free_rsp_buf(resp_buftype, rsp);
2964 return rc;
2965}
2966
35143eb5
PS		 2967static int
2968send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
c839ff24 2969 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
35143eb5
PS		 2970 unsigned int num, void **data, unsigned int *size)
2971{
2972 struct smb2_set_info_req *req;
2973 struct smb2_set_info_rsp *rsp = NULL;
2974 struct kvec *iov;
da502f7d 2975 struct kvec rsp_iov;
35143eb5
PS		 2976 int rc = 0;
2977 int resp_buftype;
2978 unsigned int i;
2979 struct TCP_Server_Info *server;
2980 struct cifs_ses *ses = tcon->ses;
7fb8986e 2981 int flags = 0;
35143eb5
PS		 2982
2983 if (ses && (ses->server))
2984 server = ses->server;
2985 else
2986 return -EIO;
2987
2988 if (!num)
2989 return -EINVAL;
2990
2991 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
2992 if (!iov)
2993 return -ENOMEM;
2994
2995 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
2996 if (rc) {
2997 kfree(iov);
2998 return rc;
2999 }
3000
7fb8986e
PS		 3001 if (encryption_required(tcon))
3002 flags |= CIFS_TRANSFORM_REQ;
3003
31473fc4 3004 req->hdr.sync_hdr.ProcessId = cpu_to_le32(pid);
c839ff24 3005
35143eb5
PS		 3006 req->InfoType = SMB2_O_INFO_FILE;
3007 req->FileInfoClass = info_class;
3008 req->PersistentFileId = persistent_fid;
3009 req->VolatileFileId = volatile_fid;
3010
3011 /* 4 for RFC1001 length and 1 for Buffer */
3012 req->BufferOffset =
3013 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
3014 req->BufferLength = cpu_to_le32(*size);
3015
3016 inc_rfc1001_len(req, *size - 1 /* Buffer */);
3017
3018 memcpy(req->Buffer, *data, *size);
3019
3020 iov[0].iov_base = (char *)req;
3021 /* 4 for RFC1001 length */
3022 iov[0].iov_len = get_rfc1002_length(req) + 4;
3023
3024 for (i = 1; i < num; i++) {
3025 inc_rfc1001_len(req, size[i]);
3026 le32_add_cpu(&req->BufferLength, size[i]);
3027 iov[i].iov_base = (char *)data[i];
3028 iov[i].iov_len = size[i];
3029 }
3030
7fb8986e 3031 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 3032 cifs_small_buf_release(req);
3033 rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
35143eb5 3034
7d3fb24b 3035 if (rc != 0)
35143eb5 3036 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
7d3fb24b 3037
35143eb5
PS		 3038 free_rsp_buf(resp_buftype, rsp);
3039 kfree(iov);
3040 return rc;
3041}
3042
3043int
3044SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
3045 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3046{
3047 struct smb2_file_rename_info info;
3048 void **data;
3049 unsigned int size[2];
3050 int rc;
3051 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3052
3053 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
3054 if (!data)
3055 return -ENOMEM;
3056
3057 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
3058 /* 0 = fail if target already exists */
3059 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3060 info.FileNameLength = cpu_to_le32(len);
3061
3062 data[0] = &info;
3063 size[0] = sizeof(struct smb2_file_rename_info);
3064
3065 data[1] = target_file;
3066 size[1] = len + 2 /* null */;
3067
3068 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
c839ff24
PS		 3069 current->tgid, FILE_RENAME_INFORMATION, 2, data,
3070 size);
35143eb5
PS		 3071 kfree(data);
3072 return rc;
3073}
568798cc 3074
897fba11
SF		 3075int
3076SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
3077 u64 persistent_fid, u64 volatile_fid)
3078{
3079 __u8 delete_pending = 1;
3080 void *data;
3081 unsigned int size;
3082
3083 data = &delete_pending;
3084 size = 1; /* sizeof __u8 */
3085
3086 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3087 current->tgid, FILE_DISPOSITION_INFORMATION, 1, &data,
3088 &size);
3089}
3090
568798cc
PS		 3091int
3092SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
3093 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3094{
3095 struct smb2_file_link_info info;
3096 void **data;
3097 unsigned int size[2];
3098 int rc;
3099 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3100
3101 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
3102 if (!data)
3103 return -ENOMEM;
3104
3105 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
3106 /* 0 = fail if link already exists */
3107 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3108 info.FileNameLength = cpu_to_le32(len);
3109
3110 data[0] = &info;
3111 size[0] = sizeof(struct smb2_file_link_info);
3112
3113 data[1] = target_file;
3114 size[1] = len + 2 /* null */;
3115
3116 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
c839ff24 3117 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
568798cc
PS		 3118 kfree(data);
3119 return rc;
3120}
c839ff24
PS		 3121
3122int
3123SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
f29ebb47 3124 u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc)
c839ff24
PS		 3125{
3126 struct smb2_file_eof_info info;
3127 void *data;
3128 unsigned int size;
3129
3130 info.EndOfFile = *eof;
3131
3132 data = &info;
3133 size = sizeof(struct smb2_file_eof_info);
3134
f29ebb47
SF		 3135 if (is_falloc)
3136 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3137 pid, FILE_ALLOCATION_INFORMATION, 1, &data, &size);
3138 else
3139 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3140 pid, FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
c839ff24 3141}
1feeaac7
PS		 3142
3143int
3144SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
3145 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
3146{
3147 unsigned int size;
3148 size = sizeof(FILE_BASIC_INFO);
3149 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3150 current->tgid, FILE_BASIC_INFORMATION, 1,
3151 (void **)&buf, &size);
3152}
983c88a4
PS		 3153
3154int
3155SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
3156 const u64 persistent_fid, const u64 volatile_fid,
3157 __u8 oplock_level)
3158{
3159 int rc;
3160 struct smb2_oplock_break *req = NULL;
7fb8986e 3161 int flags = CIFS_OBREAK_OP;
983c88a4 3162
f96637be 3163 cifs_dbg(FYI, "SMB2_oplock_break\n");
983c88a4 3164 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
983c88a4
PS		 3165 if (rc)
3166 return rc;
3167
7fb8986e
PS		 3168 if (encryption_required(tcon))
3169 flags |= CIFS_TRANSFORM_REQ;
3170
983c88a4
PS		 3171 req->VolatileFid = volatile_fid;
3172 req->PersistentFid = persistent_fid;
3173 req->OplockLevel = oplock_level;
31473fc4 3174 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
983c88a4 3175
7fb8986e 3176 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, flags);
da502f7d 3177 cifs_small_buf_release(req);
983c88a4
PS		 3178
3179 if (rc) {
3180 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 3181 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
983c88a4
PS		 3182 }
3183
3184 return rc;
3185}
6fc05c25
PS		 3186
3187static void
3188copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
3189 struct kstatfs *kst)
3190{
3191 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
3192 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
3193 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
3194 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
3195 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
3196 return;
3197}
3198
3199static int
3200build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
3201 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
3202{
3203 int rc;
3204 struct smb2_query_info_req *req;
3205
f96637be 3206 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
6fc05c25
PS		 3207
3208 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
3209 return -EIO;
3210
3211 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
3212 if (rc)
3213 return rc;
3214
3215 req->InfoType = SMB2_O_INFO_FILESYSTEM;
3216 req->FileInfoClass = level;
3217 req->PersistentFileId = persistent_fid;
3218 req->VolatileFileId = volatile_fid;
3219 /* 4 for rfc1002 length field and 1 for pad */
3220 req->InputBufferOffset =
3221 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
3222 req->OutputBufferLength = cpu_to_le32(
3223 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
3224
3225 iov->iov_base = (char *)req;
3226 /* 4 for rfc1002 length field */
3227 iov->iov_len = get_rfc1002_length(req) + 4;
3228 return 0;
3229}
3230
3231int
3232SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
3233 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
3234{
3235 struct smb2_query_info_rsp *rsp = NULL;
3236 struct kvec iov;
da502f7d 3237 struct kvec rsp_iov;
6fc05c25
PS		 3238 int rc = 0;
3239 int resp_buftype;
3240 struct cifs_ses *ses = tcon->ses;
3241 struct smb2_fs_full_size_info *info = NULL;
7fb8986e 3242 int flags = 0;
6fc05c25
PS		 3243
3244 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
3245 sizeof(struct smb2_fs_full_size_info),
3246 persistent_fid, volatile_fid);
3247 if (rc)
3248 return rc;
3249
7fb8986e
PS		 3250 if (encryption_required(tcon))
3251 flags |= CIFS_TRANSFORM_REQ;
3252
3253 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d 3254 cifs_small_buf_release(iov.iov_base);
6fc05c25
PS		 3255 if (rc) {
3256 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
34f62640 3257 goto qfsinf_exit;
6fc05c25 3258 }
da502f7d 3259 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
6fc05c25
PS		 3260
3261 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
3262 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
3263 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
3264 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
3265 sizeof(struct smb2_fs_full_size_info));
3266 if (!rc)
3267 copy_fs_info_to_kstatfs(info, fsdata);
3268
34f62640 3269qfsinf_exit:
da502f7d 3270 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
34f62640
SF		 3271 return rc;
3272}
3273
3274int
3275SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2167114c 3276 u64 persistent_fid, u64 volatile_fid, int level)
34f62640
SF		 3277{
3278 struct smb2_query_info_rsp *rsp = NULL;
3279 struct kvec iov;
da502f7d 3280 struct kvec rsp_iov;
34f62640 3281 int rc = 0;
2167114c 3282 int resp_buftype, max_len, min_len;
34f62640
SF		 3283 struct cifs_ses *ses = tcon->ses;
3284 unsigned int rsp_len, offset;
7fb8986e 3285 int flags = 0;
34f62640 3286
2167114c
SF		 3287 if (level == FS_DEVICE_INFORMATION) {
3288 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3289 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3290 } else if (level == FS_ATTRIBUTE_INFORMATION) {
3291 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
3292 min_len = MIN_FS_ATTR_INFO_SIZE;
af6a12ea
SF		 3293 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
3294 max_len = sizeof(struct smb3_fs_ss_info);
3295 min_len = sizeof(struct smb3_fs_ss_info);
2167114c 3296 } else {
af6a12ea 3297 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2167114c
SF		 3298 return -EINVAL;
3299 }
3300
3301 rc = build_qfs_info_req(&iov, tcon, level, max_len,
34f62640
SF		 3302 persistent_fid, volatile_fid);
3303 if (rc)
3304 return rc;
3305
7fb8986e
PS		 3306 if (encryption_required(tcon))
3307 flags |= CIFS_TRANSFORM_REQ;
3308
3309 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d 3310 cifs_small_buf_release(iov.iov_base);
34f62640
SF		 3311 if (rc) {
3312 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
3313 goto qfsattr_exit;
3314 }
da502f7d 3315 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
34f62640
SF		 3316
3317 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
3318 offset = le16_to_cpu(rsp->OutputBufferOffset);
2167114c
SF		 3319 rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
3320 if (rc)
3321 goto qfsattr_exit;
3322
3323 if (level == FS_ATTRIBUTE_INFORMATION)
34f62640
SF		 3324 memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
3325 + (char *)&rsp->hdr, min_t(unsigned int,
2167114c
SF		 3326 rsp_len, max_len));
3327 else if (level == FS_DEVICE_INFORMATION)
3328 memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
3329 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
af6a12ea
SF		 3330 else if (level == FS_SECTOR_SIZE_INFORMATION) {
3331 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
3332 (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
3333 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
3334 tcon->perf_sector_size =
3335 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
3336 }
34f62640
SF		 3337
3338qfsattr_exit:
da502f7d 3339 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
6fc05c25
PS		 3340 return rc;
3341}
f7ba7fe6
PS		 3342
3343int
3344smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
3345 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3346 const __u32 num_lock, struct smb2_lock_element *buf)
3347{
3348 int rc = 0;
3349 struct smb2_lock_req *req = NULL;
3350 struct kvec iov[2];
da502f7d 3351 struct kvec rsp_iov;
f7ba7fe6
PS		 3352 int resp_buf_type;
3353 unsigned int count;
7fb8986e 3354 int flags = CIFS_NO_RESP;
f7ba7fe6 3355
f96637be 3356 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
f7ba7fe6
PS		 3357
3358 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
3359 if (rc)
3360 return rc;
3361
7fb8986e
PS		 3362 if (encryption_required(tcon))
3363 flags |= CIFS_TRANSFORM_REQ;
3364
31473fc4 3365 req->hdr.sync_hdr.ProcessId = cpu_to_le32(pid);
f7ba7fe6
PS		 3366 req->LockCount = cpu_to_le16(num_lock);
3367
3368 req->PersistentFileId = persist_fid;
3369 req->VolatileFileId = volatile_fid;
3370
3371 count = num_lock * sizeof(struct smb2_lock_element);
3372 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
3373
3374 iov[0].iov_base = (char *)req;
3375 /* 4 for rfc1002 length field and count for all locks */
3376 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
3377 iov[1].iov_base = (char *)buf;
3378 iov[1].iov_len = count;
3379
3380 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
7fb8986e 3381 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, flags,
da502f7d
PS		 3382 &rsp_iov);
3383 cifs_small_buf_release(req);
f7ba7fe6 3384 if (rc) {
f96637be 3385 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
f7ba7fe6
PS		 3386 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
3387 }
3388
3389 return rc;
3390}
3391
3392int
3393SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
3394 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3395 const __u64 length, const __u64 offset, const __u32 lock_flags,
3396 const bool wait)
3397{
3398 struct smb2_lock_element lock;
3399
3400 lock.Offset = cpu_to_le64(offset);
3401 lock.Length = cpu_to_le64(length);
3402 lock.Flags = cpu_to_le32(lock_flags);
3403 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
3404 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
3405
3406 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
3407}
0822f514
PS		 3408
3409int
3410SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
3411 __u8 *lease_key, const __le32 lease_state)
3412{
3413 int rc;
3414 struct smb2_lease_ack *req = NULL;
7fb8986e 3415 int flags = CIFS_OBREAK_OP;
0822f514 3416
f96637be 3417 cifs_dbg(FYI, "SMB2_lease_break\n");
0822f514 3418 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
0822f514
PS		 3419 if (rc)
3420 return rc;
3421
7fb8986e
PS		 3422 if (encryption_required(tcon))
3423 flags |= CIFS_TRANSFORM_REQ;
3424
31473fc4 3425 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
0822f514
PS		 3426 req->StructureSize = cpu_to_le16(36);
3427 inc_rfc1001_len(req, 12);
3428
3429 memcpy(req->LeaseKey, lease_key, 16);
3430 req->LeaseState = lease_state;
3431
7fb8986e 3432 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, flags);
da502f7d 3433 cifs_small_buf_release(req);
0822f514
PS		 3434
3435 if (rc) {
3436 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 3437 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
0822f514
PS		 3438 }
3439
3440 return rc;
3441}
A mirror of Linus' kernel repository