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CIFS: Fix build failure with smb2
[mirror_ubuntu-artful-kernel.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>
33319141 36#include <linux/pagemap.h>
ec2e4523
PS		 37#include <linux/xattr.h>
38#include "smb2pdu.h"
39#include "cifsglob.h"
40#include "cifsacl.h"
41#include "cifsproto.h"
42#include "smb2proto.h"
43#include "cifs_unicode.h"
44#include "cifs_debug.h"
45#include "ntlmssp.h"
46#include "smb2status.h"
09a4707e 47#include "smb2glob.h"
d324f08d 48#include "cifspdu.h"
ceb1b0b9 49#include "cifs_spnego.h"
ec2e4523
PS		 50
51/*
52 * The following table defines the expected "StructureSize" of SMB2 requests
53 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
54 *
55 * Note that commands are defined in smb2pdu.h in le16 but the array below is
56 * indexed by command in host byte order.
57 */
58static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
59 /* SMB2_NEGOTIATE */ 36,
60 /* SMB2_SESSION_SETUP */ 25,
61 /* SMB2_LOGOFF */ 4,
62 /* SMB2_TREE_CONNECT */ 9,
63 /* SMB2_TREE_DISCONNECT */ 4,
64 /* SMB2_CREATE */ 57,
65 /* SMB2_CLOSE */ 24,
66 /* SMB2_FLUSH */ 24,
67 /* SMB2_READ */ 49,
68 /* SMB2_WRITE */ 49,
69 /* SMB2_LOCK */ 48,
70 /* SMB2_IOCTL */ 57,
71 /* SMB2_CANCEL */ 4,
72 /* SMB2_ECHO */ 4,
73 /* SMB2_QUERY_DIRECTORY */ 33,
74 /* SMB2_CHANGE_NOTIFY */ 32,
75 /* SMB2_QUERY_INFO */ 41,
76 /* SMB2_SET_INFO */ 33,
77 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
78};
79
7fb8986e
PS		 80static int encryption_required(const struct cifs_tcon *tcon)
81{
ae6f8dd4
PS		 82 if (!tcon)
83 return 0;
7fb8986e
PS		 84 if ((tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
85 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
86 return 1;
ae6f8dd4
PS		 87 if (tcon->seal &&
88 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
89 return 1;
7fb8986e
PS		 90 return 0;
91}
ec2e4523
PS		 92
93static void
cb200bd6 94smb2_hdr_assemble(struct smb2_sync_hdr *shdr, __le16 smb2_cmd,
ec2e4523
PS		 95 const struct cifs_tcon *tcon)
96{
31473fc4
PS		 97 shdr->ProtocolId = SMB2_PROTO_NUMBER;
98 shdr->StructureSize = cpu_to_le16(64);
99 shdr->Command = smb2_cmd;
7d414f39
RL		 100 if (tcon && tcon->ses && tcon->ses->server) {
101 struct TCP_Server_Info *server = tcon->ses->server;
102
103 spin_lock(&server->req_lock);
104 /* Request up to 2 credits but don't go over the limit. */
141891f4 105 if (server->credits >= server->max_credits)
31473fc4 106 shdr->CreditRequest = cpu_to_le16(0);
7d414f39 107 else
31473fc4 108 shdr->CreditRequest = cpu_to_le16(
141891f4 109 min_t(int, server->max_credits -
7d414f39
RL		 110 server->credits, 2));
111 spin_unlock(&server->req_lock);
112 } else {
31473fc4 113 shdr->CreditRequest = cpu_to_le16(2);
7d414f39 114 }
31473fc4 115 shdr->ProcessId = cpu_to_le32((__u16)current->tgid);
ec2e4523
PS		 116
117 if (!tcon)
118 goto out;
119
2b80d049
SF		 120 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
121 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
1dc92c45 122 if ((tcon->ses) && (tcon->ses->server) &&
84ceeb96 123 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
31473fc4 124 shdr->CreditCharge = cpu_to_le16(1);
2b80d049
SF		 125 /* else CreditCharge MBZ */
126
31473fc4 127 shdr->TreeId = tcon->tid;
ec2e4523
PS		 128 /* Uid is not converted */
129 if (tcon->ses)
31473fc4 130 shdr->SessionId = tcon->ses->Suid;
f87ab88b
SF		 131
132 /*
133 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
134 * to pass the path on the Open SMB prefixed by \\server\share.
135 * Not sure when we would need to do the augmented path (if ever) and
136 * setting this flag breaks the SMB2 open operation since it is
137 * illegal to send an empty path name (without \\server\share prefix)
138 * when the DFS flag is set in the SMB open header. We could
139 * consider setting the flag on all operations other than open
140 * but it is safer to net set it for now.
141 */
142/* if (tcon->share_flags & SHI1005_FLAGS_DFS)
31473fc4 143 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
f87ab88b 144
7fb8986e
PS		 145 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign &&
146 !encryption_required(tcon))
31473fc4 147 shdr->Flags |= SMB2_FLAGS_SIGNED;
ec2e4523 148out:
ec2e4523
PS		 149 return;
150}
151
152static int
153smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
154{
155 int rc = 0;
aa24d1e9
PS		 156 struct nls_table *nls_codepage;
157 struct cifs_ses *ses;
158 struct TCP_Server_Info *server;
159
160 /*
161 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
162 * check for tcp and smb session status done differently
163 * for those three - in the calling routine.
164 */
165 if (tcon == NULL)
166 return rc;
167
168 if (smb2_command == SMB2_TREE_CONNECT)
169 return rc;
170
171 if (tcon->tidStatus == CifsExiting) {
172 /*
173 * only tree disconnect, open, and write,
174 * (and ulogoff which does not have tcon)
175 * are allowed as we start force umount.
176 */
177 if ((smb2_command != SMB2_WRITE) &&
178 (smb2_command != SMB2_CREATE) &&
179 (smb2_command != SMB2_TREE_DISCONNECT)) {
f96637be
JP		 180 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
181 smb2_command);
aa24d1e9
PS		 182 return -ENODEV;
183 }
184 }
185 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
186 (!tcon->ses->server))
187 return -EIO;
188
189 ses = tcon->ses;
190 server = ses->server;
191
192 /*
193 * Give demultiplex thread up to 10 seconds to reconnect, should be
194 * greater than cifs socket timeout which is 7 seconds
195 */
196 while (server->tcpStatus == CifsNeedReconnect) {
197 /*
198 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
199 * here since they are implicitly done when session drops.
200 */
201 switch (smb2_command) {
202 /*
203 * BB Should we keep oplock break and add flush to exceptions?
204 */
205 case SMB2_TREE_DISCONNECT:
206 case SMB2_CANCEL:
207 case SMB2_CLOSE:
208 case SMB2_OPLOCK_BREAK:
209 return -EAGAIN;
210 }
211
212 wait_event_interruptible_timeout(server->response_q,
213 (server->tcpStatus != CifsNeedReconnect), 10 * HZ);
214
215 /* are we still trying to reconnect? */
216 if (server->tcpStatus != CifsNeedReconnect)
217 break;
218
219 /*
220 * on "soft" mounts we wait once. Hard mounts keep
221 * retrying until process is killed or server comes
222 * back on-line
223 */
224 if (!tcon->retry) {
f96637be 225 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
aa24d1e9
PS		 226 return -EHOSTDOWN;
227 }
228 }
229
230 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
231 return rc;
232
233 nls_codepage = load_nls_default();
234
235 /*
236 * need to prevent multiple threads trying to simultaneously reconnect
237 * the same SMB session
238 */
239 mutex_lock(&tcon->ses->session_mutex);
240 rc = cifs_negotiate_protocol(0, tcon->ses);
241 if (!rc && tcon->ses->need_reconnect)
242 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
243
244 if (rc || !tcon->need_reconnect) {
245 mutex_unlock(&tcon->ses->session_mutex);
246 goto out;
247 }
248
249 cifs_mark_open_files_invalid(tcon);
96a988ff
PS		 250 if (tcon->use_persistent)
251 tcon->need_reopen_files = true;
52ace1ef 252
aa24d1e9
PS		 253 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
254 mutex_unlock(&tcon->ses->session_mutex);
52ace1ef 255
f96637be 256 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
aa24d1e9
PS		 257 if (rc)
258 goto out;
96a988ff
PS		 259
260 if (smb2_command != SMB2_INTERNAL_CMD)
261 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
262
aa24d1e9 263 atomic_inc(&tconInfoReconnectCount);
aa24d1e9
PS		 264out:
265 /*
266 * Check if handle based operation so we know whether we can continue
267 * or not without returning to caller to reset file handle.
268 */
269 /*
270 * BB Is flush done by server on drop of tcp session? Should we special
271 * case it and skip above?
272 */
273 switch (smb2_command) {
274 case SMB2_FLUSH:
275 case SMB2_READ:
276 case SMB2_WRITE:
277 case SMB2_LOCK:
278 case SMB2_IOCTL:
279 case SMB2_QUERY_DIRECTORY:
280 case SMB2_CHANGE_NOTIFY:
281 case SMB2_QUERY_INFO:
282 case SMB2_SET_INFO:
4772c795 283 rc = -EAGAIN;
aa24d1e9
PS		 284 }
285 unload_nls(nls_codepage);
ec2e4523
PS		 286 return rc;
287}
288
cb200bd6
PS		 289static void
290fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, void *buf,
291 unsigned int *total_len)
292{
293 struct smb2_sync_pdu *spdu = (struct smb2_sync_pdu *)buf;
294 /* lookup word count ie StructureSize from table */
295 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)];
296
297 /*
298 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
299 * largest operations (Create)
300 */
301 memset(buf, 0, 256);
302
303 smb2_hdr_assemble(&spdu->sync_hdr, smb2_command, tcon);
304 spdu->StructureSize2 = cpu_to_le16(parmsize);
305
306 *total_len = parmsize + sizeof(struct smb2_sync_hdr);
307}
308
b8f57ee8
PS		 309/* init request without RFC1001 length at the beginning */
310static int
311smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
312 void **request_buf, unsigned int *total_len)
313{
314 int rc;
315 struct smb2_sync_hdr *shdr;
316
317 rc = smb2_reconnect(smb2_command, tcon);
318 if (rc)
319 return rc;
320
321 /* BB eventually switch this to SMB2 specific small buf size */
322 *request_buf = cifs_small_buf_get();
323 if (*request_buf == NULL) {
324 /* BB should we add a retry in here if not a writepage? */
325 return -ENOMEM;
326 }
327
328 shdr = (struct smb2_sync_hdr *)(*request_buf);
329
330 fill_small_buf(smb2_command, tcon, shdr, total_len);
331
332 if (tcon != NULL) {
333#ifdef CONFIG_CIFS_STATS2
334 uint16_t com_code = le16_to_cpu(smb2_command);
335
336 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
337#endif
338 cifs_stats_inc(&tcon->num_smbs_sent);
339 }
340
341 return rc;
342}
343
ec2e4523
PS		 344/*
345 * Allocate and return pointer to an SMB request hdr, and set basic
346 * SMB information in the SMB header. If the return code is zero, this
b8f57ee8
PS		 347 * function must have filled in request_buf pointer. The returned buffer
348 * has RFC1001 length at the beginning.
ec2e4523
PS		 349 */
350static int
351small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
352 void **request_buf)
353{
cb200bd6
PS		 354 int rc;
355 unsigned int total_len;
356 struct smb2_pdu *pdu;
ec2e4523
PS		 357
358 rc = smb2_reconnect(smb2_command, tcon);
359 if (rc)
360 return rc;
361
362 /* BB eventually switch this to SMB2 specific small buf size */
363 *request_buf = cifs_small_buf_get();
364 if (*request_buf == NULL) {
365 /* BB should we add a retry in here if not a writepage? */
366 return -ENOMEM;
367 }
368
cb200bd6
PS		 369 pdu = (struct smb2_pdu *)(*request_buf);
370
371 fill_small_buf(smb2_command, tcon, get_sync_hdr(pdu), &total_len);
372
373 /* Note this is only network field converted to big endian */
374 pdu->hdr.smb2_buf_length = cpu_to_be32(total_len);
ec2e4523
PS		 375
376 if (tcon != NULL) {
377#ifdef CONFIG_CIFS_STATS2
ec2e4523
PS		 378 uint16_t com_code = le16_to_cpu(smb2_command);
379 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
ec2e4523
PS		 380#endif
381 cifs_stats_inc(&tcon->num_smbs_sent);
382 }
383
384 return rc;
385}
386
ebb3a9d4
SF		 387#ifdef CONFIG_CIFS_SMB311
388/* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
389#define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
390
391
392#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
393#define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
394
395static void
396build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
397{
398 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
399 pneg_ctxt->DataLength = cpu_to_le16(38);
400 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
401 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
402 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
403 pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
404}
405
406static void
407build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
408{
409 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
410 pneg_ctxt->DataLength = cpu_to_le16(6);
411 pneg_ctxt->CipherCount = cpu_to_le16(2);
412 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
413 pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM;
414}
415
416static void
417assemble_neg_contexts(struct smb2_negotiate_req *req)
418{
419
420 /* +4 is to account for the RFC1001 len field */
421 char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT + 4;
422
423 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
424 /* Add 2 to size to round to 8 byte boundary */
425 pneg_ctxt += 2 + sizeof(struct smb2_preauth_neg_context);
426 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
427 req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
428 req->NegotiateContextCount = cpu_to_le16(2);
429 inc_rfc1001_len(req, 4 + sizeof(struct smb2_preauth_neg_context) + 2
430 + sizeof(struct smb2_encryption_neg_context)); /* calculate hash */
431}
432#else
433static void assemble_neg_contexts(struct smb2_negotiate_req *req)
434{
435 return;
436}
437#endif /* SMB311 */
438
ec2e4523
PS		 439/*
440 *
441 * SMB2 Worker functions follow:
442 *
443 * The general structure of the worker functions is:
444 * 1) Call smb2_init (assembles SMB2 header)
445 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
446 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
447 * 4) Decode SMB2 command specific fields in the fixed length area
448 * 5) Decode variable length data area (if any for this SMB2 command type)
449 * 6) Call free smb buffer
450 * 7) return
451 *
452 */
453
454int
455SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
456{
457 struct smb2_negotiate_req *req;
458 struct smb2_negotiate_rsp *rsp;
459 struct kvec iov[1];
da502f7d 460 struct kvec rsp_iov;
ec2e4523
PS		 461 int rc = 0;
462 int resp_buftype;
3534b850 463 struct TCP_Server_Info *server = ses->server;
ec2e4523
PS		 464 int blob_offset, blob_length;
465 char *security_blob;
466 int flags = CIFS_NEG_OP;
467
f96637be 468 cifs_dbg(FYI, "Negotiate protocol\n");
ec2e4523 469
3534b850
JL		 470 if (!server) {
471 WARN(1, "%s: server is NULL!\n", __func__);
472 return -EIO;
ec2e4523
PS		 473 }
474
475 rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
476 if (rc)
477 return rc;
478
31473fc4 479 req->hdr.sync_hdr.SessionId = 0;
ec2e4523 480
e4aa25e7 481 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
ec2e4523 482
e4aa25e7
SF		 483 req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */
484 inc_rfc1001_len(req, 2);
ec2e4523
PS		 485
486 /* only one of SMB2 signing flags may be set in SMB2 request */
38d77c50 487 if (ses->sign)
9cd2e62c 488 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
38d77c50 489 else if (global_secflags & CIFSSEC_MAY_SIGN)
9cd2e62c 490 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
38d77c50
JL		 491 else
492 req->SecurityMode = 0;
ec2e4523 493
e4aa25e7 494 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
ec2e4523 495
3c5f9be1
SF		 496 /* ClientGUID must be zero for SMB2.02 dialect */
497 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
498 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
ebb3a9d4 499 else {
3c5f9be1
SF		 500 memcpy(req->ClientGUID, server->client_guid,
501 SMB2_CLIENT_GUID_SIZE);
ebb3a9d4
SF		 502 if (ses->server->vals->protocol_id == SMB311_PROT_ID)
503 assemble_neg_contexts(req);
504 }
ec2e4523
PS		 505 iov[0].iov_base = (char *)req;
506 /* 4 for rfc1002 length field */
507 iov[0].iov_len = get_rfc1002_length(req) + 4;
508
da502f7d
PS		 509 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
510 cifs_small_buf_release(req);
511 rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base;
ec2e4523
PS		 512 /*
513 * No tcon so can't do
514 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
515 */
516 if (rc != 0)
517 goto neg_exit;
518
f96637be 519 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
ec2e4523 520
e4aa25e7
SF		 521 /* BB we may eventually want to match the negotiated vs. requested
522 dialect, even though we are only requesting one at a time */
523 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
f96637be 524 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
e4aa25e7 525 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
f96637be 526 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
e4aa25e7 527 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
f96637be 528 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
20b6d8b4
SF		 529 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
530 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
5f7fbf73
SF		 531#ifdef CONFIG_CIFS_SMB311
532 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
533 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
534#endif /* SMB311 */
ec2e4523 535 else {
f799d623 536 cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
f96637be 537 le16_to_cpu(rsp->DialectRevision));
ec2e4523
PS		 538 rc = -EIO;
539 goto neg_exit;
540 }
541 server->dialect = le16_to_cpu(rsp->DialectRevision);
542
e598d1d8
JL		 543 /* SMB2 only has an extended negflavor */
544 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
2365c4ea
PS		 545 /* set it to the maximum buffer size value we can send with 1 credit */
546 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
547 SMB2_MAX_BUFFER_SIZE);
ec2e4523
PS		 548 server->max_read = le32_to_cpu(rsp->MaxReadSize);
549 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
550 /* BB Do we need to validate the SecurityMode? */
551 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
552 server->capabilities = le32_to_cpu(rsp->Capabilities);
29e20f9c
PS		 553 /* Internal types */
554 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
ec2e4523
PS		 555
556 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
557 &rsp->hdr);
5d875cc9
SF		 558 /*
559 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
560 * for us will be
561 * ses->sectype = RawNTLMSSP;
562 * but for time being this is our only auth choice so doesn't matter.
563 * We just found a server which sets blob length to zero expecting raw.
564 */
565 if (blob_length == 0)
566 cifs_dbg(FYI, "missing security blob on negprot\n");
3c1bf7e4 567
38d77c50 568 rc = cifs_enable_signing(server, ses->sign);
9ddec561
JL		 569 if (rc)
570 goto neg_exit;
ceb1b0b9 571 if (blob_length) {
ebdd207e 572 rc = decode_negTokenInit(security_blob, blob_length, server);
ceb1b0b9
SF		 573 if (rc == 1)
574 rc = 0;
575 else if (rc == 0)
576 rc = -EIO;
ec2e4523 577 }
ec2e4523
PS		 578neg_exit:
579 free_rsp_buf(resp_buftype, rsp);
580 return rc;
581}
5478f9ba 582
ff1c038a
SF		 583int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
584{
585 int rc = 0;
586 struct validate_negotiate_info_req vneg_inbuf;
587 struct validate_negotiate_info_rsp *pneg_rsp;
588 u32 rsplen;
589
590 cifs_dbg(FYI, "validate negotiate\n");
591
592 /*
593 * validation ioctl must be signed, so no point sending this if we
594 * can not sign it. We could eventually change this to selectively
595 * sign just this, the first and only signed request on a connection.
596 * This is good enough for now since a user who wants better security
597 * would also enable signing on the mount. Having validation of
598 * negotiate info for signed connections helps reduce attack vectors
599 */
600 if (tcon->ses->server->sign == false)
601 return 0; /* validation requires signing */
602
603 vneg_inbuf.Capabilities =
604 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
39552ea8
SP		 605 memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid,
606 SMB2_CLIENT_GUID_SIZE);
ff1c038a
SF		 607
608 if (tcon->ses->sign)
609 vneg_inbuf.SecurityMode =
610 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
611 else if (global_secflags & CIFSSEC_MAY_SIGN)
612 vneg_inbuf.SecurityMode =
613 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
614 else
615 vneg_inbuf.SecurityMode = 0;
616
617 vneg_inbuf.DialectCount = cpu_to_le16(1);
618 vneg_inbuf.Dialects[0] =
619 cpu_to_le16(tcon->ses->server->vals->protocol_id);
620
621 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
622 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
51146625 623 false /* use_ipc */,
ff1c038a
SF		 624 (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
625 (char **)&pneg_rsp, &rsplen);
626
627 if (rc != 0) {
628 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
629 return -EIO;
630 }
631
632 if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
633 cifs_dbg(VFS, "invalid size of protocol negotiate response\n");
634 return -EIO;
635 }
636
637 /* check validate negotiate info response matches what we got earlier */
638 if (pneg_rsp->Dialect !=
639 cpu_to_le16(tcon->ses->server->vals->protocol_id))
640 goto vneg_out;
641
642 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
643 goto vneg_out;
644
645 /* do not validate server guid because not saved at negprot time yet */
646
647 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
648 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
649 goto vneg_out;
650
651 /* validate negotiate successful */
652 cifs_dbg(FYI, "validate negotiate info successful\n");
653 return 0;
654
655vneg_out:
656 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
657 return -EIO;
658}
659
ef65aaed
SP		 660enum securityEnum
661smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
662{
663 switch (requested) {
664 case Kerberos:
665 case RawNTLMSSP:
666 return requested;
667 case NTLMv2:
668 return RawNTLMSSP;
669 case Unspecified:
670 if (server->sec_ntlmssp &&
671 (global_secflags & CIFSSEC_MAY_NTLMSSP))
672 return RawNTLMSSP;
673 if ((server->sec_kerberos || server->sec_mskerberos) &&
674 (global_secflags & CIFSSEC_MAY_KRB5))
675 return Kerberos;
676 /* Fallthrough */
677 default:
678 return Unspecified;
679 }
680}
681
3baf1a7b
SP		 682struct SMB2_sess_data {
683 unsigned int xid;
684 struct cifs_ses *ses;
685 struct nls_table *nls_cp;
686 void (*func)(struct SMB2_sess_data *);
687 int result;
688 u64 previous_session;
689
690 /* we will send the SMB in three pieces:
691 * a fixed length beginning part, an optional
692 * SPNEGO blob (which can be zero length), and a
693 * last part which will include the strings
694 * and rest of bcc area. This allows us to avoid
695 * a large buffer 17K allocation
696 */
697 int buf0_type;
698 struct kvec iov[2];
699};
700
701static int
702SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
703{
704 int rc;
705 struct cifs_ses *ses = sess_data->ses;
706 struct smb2_sess_setup_req *req;
707 struct TCP_Server_Info *server = ses->server;
708
709 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
710 if (rc)
711 return rc;
712
31473fc4
PS		 713 /* First session, not a reauthenticate */
714 req->hdr.sync_hdr.SessionId = 0;
3baf1a7b
SP		 715
716 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
717 req->PreviousSessionId = sess_data->previous_session;
718
719 req->Flags = 0; /* MBZ */
720 /* to enable echos and oplocks */
31473fc4 721 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(3);
3baf1a7b
SP		 722
723 /* only one of SMB2 signing flags may be set in SMB2 request */
724 if (server->sign)
725 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
726 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
727 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
728 else
729 req->SecurityMode = 0;
730
731 req->Capabilities = 0;
732 req->Channel = 0; /* MBZ */
733
734 sess_data->iov[0].iov_base = (char *)req;
735 /* 4 for rfc1002 length field and 1 for pad */
736 sess_data->iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
737 /*
738 * This variable will be used to clear the buffer
739 * allocated above in case of any error in the calling function.
740 */
741 sess_data->buf0_type = CIFS_SMALL_BUFFER;
742
743 return 0;
744}
745
746static void
747SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
748{
749 free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
750 sess_data->buf0_type = CIFS_NO_BUFFER;
751}
752
753static int
754SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
755{
756 int rc;
757 struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
da502f7d 758 struct kvec rsp_iov = { NULL, 0 };
3baf1a7b
SP		 759
760 /* Testing shows that buffer offset must be at location of Buffer[0] */
761 req->SecurityBufferOffset =
762 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
763 1 /* pad */ - 4 /* rfc1001 len */);
764 req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
765
766 inc_rfc1001_len(req, sess_data->iov[1].iov_len - 1 /* pad */);
767
768 /* BB add code to build os and lm fields */
769
770 rc = SendReceive2(sess_data->xid, sess_data->ses,
771 sess_data->iov, 2,
772 &sess_data->buf0_type,
da502f7d
PS		 773 CIFS_LOG_ERROR | CIFS_NEG_OP, &rsp_iov);
774 cifs_small_buf_release(sess_data->iov[0].iov_base);
775 memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
3baf1a7b
SP		 776
777 return rc;
778}
779
780static int
781SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
782{
783 int rc = 0;
784 struct cifs_ses *ses = sess_data->ses;
785
786 mutex_lock(&ses->server->srv_mutex);
cabfb368 787 if (ses->server->ops->generate_signingkey) {
3baf1a7b 788 rc = ses->server->ops->generate_signingkey(ses);
3baf1a7b
SP		 789 if (rc) {
790 cifs_dbg(FYI,
791 "SMB3 session key generation failed\n");
792 mutex_unlock(&ses->server->srv_mutex);
cabfb368 793 return rc;
3baf1a7b
SP		 794 }
795 }
796 if (!ses->server->session_estab) {
797 ses->server->sequence_number = 0x2;
798 ses->server->session_estab = true;
799 }
800 mutex_unlock(&ses->server->srv_mutex);
801
802 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
803 spin_lock(&GlobalMid_Lock);
804 ses->status = CifsGood;
805 ses->need_reconnect = false;
806 spin_unlock(&GlobalMid_Lock);
3baf1a7b
SP		 807 return rc;
808}
809
810#ifdef CONFIG_CIFS_UPCALL
811static void
812SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
813{
814 int rc;
815 struct cifs_ses *ses = sess_data->ses;
816 struct cifs_spnego_msg *msg;
817 struct key *spnego_key = NULL;
818 struct smb2_sess_setup_rsp *rsp = NULL;
819
820 rc = SMB2_sess_alloc_buffer(sess_data);
821 if (rc)
822 goto out;
823
824 spnego_key = cifs_get_spnego_key(ses);
825 if (IS_ERR(spnego_key)) {
826 rc = PTR_ERR(spnego_key);
827 spnego_key = NULL;
828 goto out;
829 }
830
831 msg = spnego_key->payload.data[0];
832 /*
833 * check version field to make sure that cifs.upcall is
834 * sending us a response in an expected form
835 */
836 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
837 cifs_dbg(VFS,
838 "bad cifs.upcall version. Expected %d got %d",
839 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
840 rc = -EKEYREJECTED;
841 goto out_put_spnego_key;
842 }
843
844 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
845 GFP_KERNEL);
846 if (!ses->auth_key.response) {
847 cifs_dbg(VFS,
848 "Kerberos can't allocate (%u bytes) memory",
849 msg->sesskey_len);
850 rc = -ENOMEM;
851 goto out_put_spnego_key;
852 }
853 ses->auth_key.len = msg->sesskey_len;
854
855 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
856 sess_data->iov[1].iov_len = msg->secblob_len;
857
858 rc = SMB2_sess_sendreceive(sess_data);
859 if (rc)
860 goto out_put_spnego_key;
861
862 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
31473fc4 863 ses->Suid = rsp->hdr.sync_hdr.SessionId;
3baf1a7b
SP		 864
865 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
3baf1a7b
SP		 866
867 rc = SMB2_sess_establish_session(sess_data);
868out_put_spnego_key:
869 key_invalidate(spnego_key);
870 key_put(spnego_key);
871out:
872 sess_data->result = rc;
873 sess_data->func = NULL;
874 SMB2_sess_free_buffer(sess_data);
875}
876#else
877static void
878SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
879{
880 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
881 sess_data->result = -EOPNOTSUPP;
882 sess_data->func = NULL;
883}
884#endif
885
166cea4d
SP		 886static void
887SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
888
889static void
890SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
5478f9ba 891{
166cea4d
SP		 892 int rc;
893 struct cifs_ses *ses = sess_data->ses;
5478f9ba 894 struct smb2_sess_setup_rsp *rsp = NULL;
166cea4d 895 char *ntlmssp_blob = NULL;
5478f9ba 896 bool use_spnego = false; /* else use raw ntlmssp */
166cea4d 897 u16 blob_length = 0;
d4e63bd6 898
5478f9ba
PS		 899 /*
900 * If memory allocation is successful, caller of this function
901 * frees it.
902 */
903 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
166cea4d
SP		 904 if (!ses->ntlmssp) {
905 rc = -ENOMEM;
906 goto out_err;
907 }
5c234aa5 908 ses->ntlmssp->sesskey_per_smbsess = true;
5478f9ba 909
166cea4d 910 rc = SMB2_sess_alloc_buffer(sess_data);
5478f9ba 911 if (rc)
166cea4d 912 goto out_err;
5478f9ba 913
166cea4d
SP		 914 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
915 GFP_KERNEL);
916 if (ntlmssp_blob == NULL) {
917 rc = -ENOMEM;
918 goto out;
919 }
c2afb814 920
166cea4d
SP		 921 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
922 if (use_spnego) {
923 /* BB eventually need to add this */
924 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
925 rc = -EOPNOTSUPP;
926 goto out;
927 } else {
928 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
929 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
930 }
931 sess_data->iov[1].iov_base = ntlmssp_blob;
932 sess_data->iov[1].iov_len = blob_length;
c2afb814 933
166cea4d
SP		 934 rc = SMB2_sess_sendreceive(sess_data);
935 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
5478f9ba 936
166cea4d
SP		 937 /* If true, rc here is expected and not an error */
938 if (sess_data->buf0_type != CIFS_NO_BUFFER &&
31473fc4 939 rsp->hdr.sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
166cea4d 940 rc = 0;
38d77c50 941
166cea4d
SP		 942 if (rc)
943 goto out;
5478f9ba 944
166cea4d
SP		 945 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
946 le16_to_cpu(rsp->SecurityBufferOffset)) {
947 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
948 le16_to_cpu(rsp->SecurityBufferOffset));
5478f9ba 949 rc = -EIO;
166cea4d 950 goto out;
5478f9ba 951 }
166cea4d
SP		 952 rc = decode_ntlmssp_challenge(rsp->Buffer,
953 le16_to_cpu(rsp->SecurityBufferLength), ses);
954 if (rc)
955 goto out;
5478f9ba 956
166cea4d 957 cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
5478f9ba 958
5478f9ba 959
31473fc4 960 ses->Suid = rsp->hdr.sync_hdr.SessionId;
166cea4d 961 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
166cea4d
SP		 962
963out:
964 kfree(ntlmssp_blob);
965 SMB2_sess_free_buffer(sess_data);
966 if (!rc) {
967 sess_data->result = 0;
968 sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
969 return;
970 }
971out_err:
972 kfree(ses->ntlmssp);
973 ses->ntlmssp = NULL;
974 sess_data->result = rc;
975 sess_data->func = NULL;
976}
5478f9ba 977
166cea4d
SP		 978static void
979SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
980{
981 int rc;
982 struct cifs_ses *ses = sess_data->ses;
983 struct smb2_sess_setup_req *req;
984 struct smb2_sess_setup_rsp *rsp = NULL;
985 unsigned char *ntlmssp_blob = NULL;
986 bool use_spnego = false; /* else use raw ntlmssp */
987 u16 blob_length = 0;
5478f9ba 988
166cea4d
SP		 989 rc = SMB2_sess_alloc_buffer(sess_data);
990 if (rc)
991 goto out;
5478f9ba 992
166cea4d 993 req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
31473fc4 994 req->hdr.sync_hdr.SessionId = ses->Suid;
166cea4d
SP		 995
996 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
997 sess_data->nls_cp);
998 if (rc) {
999 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
1000 goto out;
5478f9ba
PS		 1001 }
1002
166cea4d
SP		 1003 if (use_spnego) {
1004 /* BB eventually need to add this */
1005 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1006 rc = -EOPNOTSUPP;
1007 goto out;
1008 }
1009 sess_data->iov[1].iov_base = ntlmssp_blob;
1010 sess_data->iov[1].iov_len = blob_length;
5478f9ba 1011
166cea4d
SP		 1012 rc = SMB2_sess_sendreceive(sess_data);
1013 if (rc)
1014 goto out;
1015
1016 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1017
31473fc4 1018 ses->Suid = rsp->hdr.sync_hdr.SessionId;
5478f9ba 1019 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
5478f9ba 1020
166cea4d
SP		 1021 rc = SMB2_sess_establish_session(sess_data);
1022out:
1023 kfree(ntlmssp_blob);
1024 SMB2_sess_free_buffer(sess_data);
1025 kfree(ses->ntlmssp);
1026 ses->ntlmssp = NULL;
1027 sess_data->result = rc;
1028 sess_data->func = NULL;
1029}
d4e63bd6 1030
166cea4d
SP		 1031static int
1032SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data)
1033{
ef65aaed
SP		 1034 int type;
1035
1036 type = smb2_select_sectype(ses->server, ses->sectype);
1037 cifs_dbg(FYI, "sess setup type %d\n", type);
1038 if (type == Unspecified) {
1039 cifs_dbg(VFS,
1040 "Unable to select appropriate authentication method!");
1041 return -EINVAL;
1042 }
d4e63bd6 1043
ef65aaed 1044 switch (type) {
166cea4d
SP		 1045 case Kerberos:
1046 sess_data->func = SMB2_auth_kerberos;
1047 break;
1048 case RawNTLMSSP:
1049 sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
1050 break;
1051 default:
ef65aaed 1052 cifs_dbg(VFS, "secType %d not supported!\n", type);
166cea4d 1053 return -EOPNOTSUPP;
d4e63bd6
SP		 1054 }
1055
166cea4d
SP		 1056 return 0;
1057}
1058
1059int
1060SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
1061 const struct nls_table *nls_cp)
1062{
1063 int rc = 0;
1064 struct TCP_Server_Info *server = ses->server;
1065 struct SMB2_sess_data *sess_data;
1066
1067 cifs_dbg(FYI, "Session Setup\n");
1068
1069 if (!server) {
1070 WARN(1, "%s: server is NULL!\n", __func__);
1071 return -EIO;
d4e63bd6 1072 }
d4e63bd6 1073
166cea4d
SP		 1074 sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
1075 if (!sess_data)
1076 return -ENOMEM;
1077
1078 rc = SMB2_select_sec(ses, sess_data);
1079 if (rc)
1080 goto out;
1081 sess_data->xid = xid;
1082 sess_data->ses = ses;
1083 sess_data->buf0_type = CIFS_NO_BUFFER;
1084 sess_data->nls_cp = (struct nls_table *) nls_cp;
1085
1086 while (sess_data->func)
1087 sess_data->func(sess_data);
1088
3baf1a7b 1089 rc = sess_data->result;
166cea4d 1090out:
3baf1a7b 1091 kfree(sess_data);
5478f9ba
PS		 1092 return rc;
1093}
1094
1095int
1096SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
1097{
1098 struct smb2_logoff_req *req; /* response is also trivial struct */
1099 int rc = 0;
1100 struct TCP_Server_Info *server;
7fb8986e 1101 int flags = 0;
5478f9ba 1102
f96637be 1103 cifs_dbg(FYI, "disconnect session %p\n", ses);
5478f9ba
PS		 1104
1105 if (ses && (ses->server))
1106 server = ses->server;
1107 else
1108 return -EIO;
1109
eb4c7df6
SP		 1110 /* no need to send SMB logoff if uid already closed due to reconnect */
1111 if (ses->need_reconnect)
1112 goto smb2_session_already_dead;
1113
5478f9ba
PS		 1114 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
1115 if (rc)
1116 return rc;
1117
1118 /* since no tcon, smb2_init can not do this, so do here */
31473fc4 1119 req->hdr.sync_hdr.SessionId = ses->Suid;
7fb8986e
PS		 1120
1121 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
1122 flags |= CIFS_TRANSFORM_REQ;
1123 else if (server->sign)
31473fc4 1124 req->hdr.sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
5478f9ba 1125
7fb8986e 1126 rc = SendReceiveNoRsp(xid, ses, (char *) req, flags);
da502f7d 1127 cifs_small_buf_release(req);
5478f9ba
PS		 1128 /*
1129 * No tcon so can't do
1130 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1131 */
eb4c7df6
SP		 1132
1133smb2_session_already_dead:
5478f9ba
PS		 1134 return rc;
1135}
faaf946a
PS		 1136
1137static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
1138{
d60622eb 1139 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
faaf946a
PS		 1140}
1141
1142#define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1143
de9f68df
SF		 1144/* These are similar values to what Windows uses */
1145static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
1146{
1147 tcon->max_chunks = 256;
1148 tcon->max_bytes_chunk = 1048576;
1149 tcon->max_bytes_copy = 16777216;
1150}
1151
faaf946a
PS		 1152int
1153SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
1154 struct cifs_tcon *tcon, const struct nls_table *cp)
1155{
1156 struct smb2_tree_connect_req *req;
1157 struct smb2_tree_connect_rsp *rsp = NULL;
1158 struct kvec iov[2];
da502f7d 1159 struct kvec rsp_iov;
faaf946a
PS		 1160 int rc = 0;
1161 int resp_buftype;
1162 int unc_path_len;
1163 struct TCP_Server_Info *server;
1164 __le16 *unc_path = NULL;
7fb8986e 1165 int flags = 0;
faaf946a 1166
f96637be 1167 cifs_dbg(FYI, "TCON\n");
faaf946a
PS		 1168
1169 if ((ses->server) && tree)
1170 server = ses->server;
1171 else
1172 return -EIO;
1173
1174 if (tcon && tcon->bad_network_name)
1175 return -ENOENT;
1176
1177 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
1178 if (unc_path == NULL)
1179 return -ENOMEM;
1180
1181 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
1182 unc_path_len *= 2;
1183 if (unc_path_len < 2) {
1184 kfree(unc_path);
1185 return -EINVAL;
1186 }
1187
1188 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
1189 if (rc) {
1190 kfree(unc_path);
1191 return rc;
1192 }
1193
1194 if (tcon == NULL) {
ae6f8dd4
PS		 1195 if ((ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA))
1196 flags |= CIFS_TRANSFORM_REQ;
1197
faaf946a 1198 /* since no tcon, smb2_init can not do this, so do here */
31473fc4 1199 req->hdr.sync_hdr.SessionId = ses->Suid;
b9043cc5
AA		 1200 if (ses->server->sign)
1201 req->hdr.sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
ae6f8dd4
PS		 1202 } else if (encryption_required(tcon))
1203 flags |= CIFS_TRANSFORM_REQ;
faaf946a
PS		 1204
1205 iov[0].iov_base = (char *)req;
1206 /* 4 for rfc1002 length field and 1 for pad */
1207 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1208
1209 /* Testing shows that buffer offset must be at location of Buffer[0] */
1210 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
1211 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
1212 req->PathLength = cpu_to_le16(unc_path_len - 2);
1213 iov[1].iov_base = unc_path;
1214 iov[1].iov_len = unc_path_len;
1215
1216 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
1217
7fb8986e 1218 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1219 cifs_small_buf_release(req);
1220 rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
faaf946a
PS		 1221
1222 if (rc != 0) {
1223 if (tcon) {
1224 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
1225 tcon->need_reconnect = true;
1226 }
1227 goto tcon_error_exit;
1228 }
1229
faaf946a 1230 if (tcon == NULL) {
31473fc4 1231 ses->ipc_tid = rsp->hdr.sync_hdr.TreeId;
faaf946a
PS		 1232 goto tcon_exit;
1233 }
1234
1235 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
f96637be 1236 cifs_dbg(FYI, "connection to disk share\n");
faaf946a
PS		 1237 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
1238 tcon->ipc = true;
f96637be 1239 cifs_dbg(FYI, "connection to pipe share\n");
faaf946a
PS		 1240 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
1241 tcon->print = true;
f96637be 1242 cifs_dbg(FYI, "connection to printer\n");
faaf946a 1243 } else {
f96637be 1244 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
faaf946a
PS		 1245 rc = -EOPNOTSUPP;
1246 goto tcon_error_exit;
1247 }
1248
1249 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
769ee6a4 1250 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
faaf946a
PS		 1251 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1252 tcon->tidStatus = CifsGood;
1253 tcon->need_reconnect = false;
31473fc4 1254 tcon->tid = rsp->hdr.sync_hdr.TreeId;
46b51d08 1255 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
faaf946a
PS		 1256
1257 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1258 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
f96637be 1259 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
ae6f8dd4
PS		 1260
1261 if (tcon->seal &&
1262 !(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
1263 cifs_dbg(VFS, "Encryption is requested but not supported\n");
1264
de9f68df 1265 init_copy_chunk_defaults(tcon);
ff1c038a
SF		 1266 if (tcon->ses->server->ops->validate_negotiate)
1267 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
faaf946a
PS		 1268tcon_exit:
1269 free_rsp_buf(resp_buftype, rsp);
1270 kfree(unc_path);
1271 return rc;
1272
1273tcon_error_exit:
31473fc4 1274 if (rsp->hdr.sync_hdr.Status == STATUS_BAD_NETWORK_NAME) {
f96637be 1275 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
18f39e7b
SF		 1276 if (tcon)
1277 tcon->bad_network_name = true;
faaf946a
PS		 1278 }
1279 goto tcon_exit;
1280}
1281
1282int
1283SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1284{
1285 struct smb2_tree_disconnect_req *req; /* response is trivial */
1286 int rc = 0;
1287 struct TCP_Server_Info *server;
1288 struct cifs_ses *ses = tcon->ses;
7fb8986e 1289 int flags = 0;
faaf946a 1290
f96637be 1291 cifs_dbg(FYI, "Tree Disconnect\n");
faaf946a
PS		 1292
1293 if (ses && (ses->server))
1294 server = ses->server;
1295 else
1296 return -EIO;
1297
1298 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1299 return 0;
1300
1301 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
1302 if (rc)
1303 return rc;
1304
7fb8986e
PS		 1305 if (encryption_required(tcon))
1306 flags |= CIFS_TRANSFORM_REQ;
1307
1308 rc = SendReceiveNoRsp(xid, ses, (char *)req, flags);
da502f7d 1309 cifs_small_buf_release(req);
faaf946a
PS		 1310 if (rc)
1311 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1312
1313 return rc;
1314}
2503a0db 1315
b8c32dbb 1316
63eb3def
PS		 1317static struct create_durable *
1318create_durable_buf(void)
1319{
1320 struct create_durable *buf;
1321
1322 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1323 if (!buf)
1324 return NULL;
1325
1326 buf->ccontext.DataOffset = cpu_to_le16(offsetof
9cbc0b73 1327 (struct create_durable, Data));
63eb3def
PS		 1328 buf->ccontext.DataLength = cpu_to_le32(16);
1329 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1330 (struct create_durable, Name));
1331 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 1332 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
63eb3def
PS		 1333 buf->Name[0] = 'D';
1334 buf->Name[1] = 'H';
1335 buf->Name[2] = 'n';
1336 buf->Name[3] = 'Q';
1337 return buf;
1338}
1339
9cbc0b73
PS		 1340static struct create_durable *
1341create_reconnect_durable_buf(struct cifs_fid *fid)
1342{
1343 struct create_durable *buf;
1344
1345 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1346 if (!buf)
1347 return NULL;
1348
1349 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1350 (struct create_durable, Data));
1351 buf->ccontext.DataLength = cpu_to_le32(16);
1352 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1353 (struct create_durable, Name));
1354 buf->ccontext.NameLength = cpu_to_le16(4);
1355 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1356 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
12197a7f 1357 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
9cbc0b73
PS		 1358 buf->Name[0] = 'D';
1359 buf->Name[1] = 'H';
1360 buf->Name[2] = 'n';
1361 buf->Name[3] = 'C';
1362 return buf;
1363}
1364
b8c32dbb 1365static __u8
42873b0a
PS		 1366parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
1367 unsigned int *epoch)
b8c32dbb
PS		 1368{
1369 char *data_offset;
b5c7cde3 1370 struct create_context *cc;
deb7deff
JM		 1371 unsigned int next;
1372 unsigned int remaining;
fd554396 1373 char *name;
b8c32dbb 1374
fd554396 1375 data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
deb7deff 1376 remaining = le32_to_cpu(rsp->CreateContextsLength);
b5c7cde3 1377 cc = (struct create_context *)data_offset;
deb7deff 1378 while (remaining >= sizeof(struct create_context)) {
b5c7cde3 1379 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
deb7deff
JM		 1380 if (le16_to_cpu(cc->NameLength) == 4 &&
1381 strncmp(name, "RqLs", 4) == 0)
1382 return server->ops->parse_lease_buf(cc, epoch);
1383
1384 next = le32_to_cpu(cc->Next);
1385 if (!next)
1386 break;
1387 remaining -= next;
1388 cc = (struct create_context *)((char *)cc + next);
1389 }
b8c32dbb 1390
b5c7cde3 1391 return 0;
b8c32dbb
PS		 1392}
1393
d22cbfec 1394static int
a41a28bd
PS		 1395add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1396 unsigned int *num_iovec, __u8 *oplock)
d22cbfec
PS		 1397{
1398 struct smb2_create_req *req = iov[0].iov_base;
1399 unsigned int num = *num_iovec;
1400
a41a28bd 1401 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
d22cbfec
PS		 1402 if (iov[num].iov_base == NULL)
1403 return -ENOMEM;
a41a28bd 1404 iov[num].iov_len = server->vals->create_lease_size;
d22cbfec
PS		 1405 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1406 if (!req->CreateContextsOffset)
1407 req->CreateContextsOffset = cpu_to_le32(
1408 sizeof(struct smb2_create_req) - 4 +
1409 iov[num - 1].iov_len);
a41a28bd
PS		 1410 le32_add_cpu(&req->CreateContextsLength,
1411 server->vals->create_lease_size);
1412 inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
d22cbfec
PS		 1413 *num_iovec = num + 1;
1414 return 0;
1415}
1416
b56eae4d
SF		 1417static struct create_durable_v2 *
1418create_durable_v2_buf(struct cifs_fid *pfid)
1419{
1420 struct create_durable_v2 *buf;
1421
1422 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
1423 if (!buf)
1424 return NULL;
1425
1426 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1427 (struct create_durable_v2, dcontext));
1428 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
1429 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1430 (struct create_durable_v2, Name));
1431 buf->ccontext.NameLength = cpu_to_le16(4);
1432
1433 buf->dcontext.Timeout = 0; /* Should this be configurable by workload */
1434 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
fa70b87c 1435 generate_random_uuid(buf->dcontext.CreateGuid);
b56eae4d
SF		 1436 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
1437
1438 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1439 buf->Name[0] = 'D';
1440 buf->Name[1] = 'H';
1441 buf->Name[2] = '2';
1442 buf->Name[3] = 'Q';
1443 return buf;
1444}
1445
1446static struct create_durable_handle_reconnect_v2 *
1447create_reconnect_durable_v2_buf(struct cifs_fid *fid)
1448{
1449 struct create_durable_handle_reconnect_v2 *buf;
1450
1451 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
1452 GFP_KERNEL);
1453 if (!buf)
1454 return NULL;
1455
1456 buf->ccontext.DataOffset =
1457 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1458 dcontext));
1459 buf->ccontext.DataLength =
1460 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
1461 buf->ccontext.NameOffset =
1462 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1463 Name));
1464 buf->ccontext.NameLength = cpu_to_le16(4);
1465
1466 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
1467 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
1468 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1469 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
1470
1471 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1472 buf->Name[0] = 'D';
1473 buf->Name[1] = 'H';
1474 buf->Name[2] = '2';
1475 buf->Name[3] = 'C';
1476 return buf;
1477}
1478
63eb3def 1479static int
b56eae4d
SF		 1480add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
1481 struct cifs_open_parms *oparms)
1482{
1483 struct smb2_create_req *req = iov[0].iov_base;
1484 unsigned int num = *num_iovec;
1485
1486 iov[num].iov_base = create_durable_v2_buf(oparms->fid);
1487 if (iov[num].iov_base == NULL)
1488 return -ENOMEM;
1489 iov[num].iov_len = sizeof(struct create_durable_v2);
1490 if (!req->CreateContextsOffset)
1491 req->CreateContextsOffset =
1492 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1493 iov[1].iov_len);
1494 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
1495 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable_v2));
1496 *num_iovec = num + 1;
1497 return 0;
1498}
1499
1500static int
1501add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
9cbc0b73 1502 struct cifs_open_parms *oparms)
63eb3def
PS		 1503{
1504 struct smb2_create_req *req = iov[0].iov_base;
1505 unsigned int num = *num_iovec;
1506
b56eae4d
SF		 1507 /* indicate that we don't need to relock the file */
1508 oparms->reconnect = false;
1509
1510 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
1511 if (iov[num].iov_base == NULL)
1512 return -ENOMEM;
1513 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
1514 if (!req->CreateContextsOffset)
1515 req->CreateContextsOffset =
1516 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1517 iov[1].iov_len);
1518 le32_add_cpu(&req->CreateContextsLength,
1519 sizeof(struct create_durable_handle_reconnect_v2));
1520 inc_rfc1001_len(&req->hdr,
1521 sizeof(struct create_durable_handle_reconnect_v2));
1522 *num_iovec = num + 1;
1523 return 0;
1524}
1525
1526static int
1527add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1528 struct cifs_open_parms *oparms, bool use_persistent)
1529{
1530 struct smb2_create_req *req = iov[0].iov_base;
1531 unsigned int num = *num_iovec;
1532
1533 if (use_persistent) {
1534 if (oparms->reconnect)
1535 return add_durable_reconnect_v2_context(iov, num_iovec,
1536 oparms);
1537 else
1538 return add_durable_v2_context(iov, num_iovec, oparms);
1539 }
1540
9cbc0b73
PS		 1541 if (oparms->reconnect) {
1542 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1543 /* indicate that we don't need to relock the file */
1544 oparms->reconnect = false;
1545 } else
1546 iov[num].iov_base = create_durable_buf();
63eb3def
PS		 1547 if (iov[num].iov_base == NULL)
1548 return -ENOMEM;
1549 iov[num].iov_len = sizeof(struct create_durable);
1550 if (!req->CreateContextsOffset)
1551 req->CreateContextsOffset =
1552 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1553 iov[1].iov_len);
31f92e9a 1554 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
63eb3def
PS		 1555 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
1556 *num_iovec = num + 1;
1557 return 0;
1558}
1559
f0712928
AA		 1560static int
1561alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
1562 const char *treename, const __le16 *path)
1563{
1564 int treename_len, path_len;
1565 struct nls_table *cp;
1566 const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
1567
1568 /*
1569 * skip leading "\\"
1570 */
1571 treename_len = strlen(treename);
1572 if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\'))
1573 return -EINVAL;
1574
1575 treename += 2;
1576 treename_len -= 2;
1577
1578 path_len = UniStrnlen((wchar_t *)path, PATH_MAX);
1579
1580 /*
1581 * make room for one path separator between the treename and
1582 * path
1583 */
1584 *out_len = treename_len + 1 + path_len;
1585
1586 /*
1587 * final path needs to be null-terminated UTF16 with a
1588 * size aligned to 8
1589 */
1590
1591 *out_size = roundup((*out_len+1)*2, 8);
1592 *out_path = kzalloc(*out_size, GFP_KERNEL);
1593 if (!*out_path)
1594 return -ENOMEM;
1595
1596 cp = load_nls_default();
1597 cifs_strtoUTF16(*out_path, treename, treename_len, cp);
1598 UniStrcat(*out_path, sep);
1599 UniStrcat(*out_path, path);
1600 unload_nls(cp);
1601
1602 return 0;
1603}
1604
2503a0db 1605int
064f6047 1606SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
b42bf888
PS		 1607 __u8 *oplock, struct smb2_file_all_info *buf,
1608 struct smb2_err_rsp **err_buf)
2503a0db
PS		 1609{
1610 struct smb2_create_req *req;
1611 struct smb2_create_rsp *rsp;
1612 struct TCP_Server_Info *server;
064f6047 1613 struct cifs_tcon *tcon = oparms->tcon;
2503a0db 1614 struct cifs_ses *ses = tcon->ses;
63eb3def 1615 struct kvec iov[4];
da502f7d 1616 struct kvec rsp_iov;
2503a0db
PS		 1617 int resp_buftype;
1618 int uni_path_len;
b8c32dbb
PS		 1619 __le16 *copy_path = NULL;
1620 int copy_size;
2503a0db 1621 int rc = 0;
da502f7d 1622 unsigned int n_iov = 2;
ca81983f 1623 __u32 file_attributes = 0;
663a9621 1624 char *dhc_buf = NULL, *lc_buf = NULL;
7fb8986e 1625 int flags = 0;
2503a0db 1626
f96637be 1627 cifs_dbg(FYI, "create/open\n");
2503a0db
PS		 1628
1629 if (ses && (ses->server))
1630 server = ses->server;
1631 else
1632 return -EIO;
1633
1634 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
1635 if (rc)
1636 return rc;
1637
7fb8986e
PS		 1638 if (encryption_required(tcon))
1639 flags |= CIFS_TRANSFORM_REQ;
1640
064f6047 1641 if (oparms->create_options & CREATE_OPTION_READONLY)
ca81983f 1642 file_attributes |= ATTR_READONLY;
db8b631d
SF		 1643 if (oparms->create_options & CREATE_OPTION_SPECIAL)
1644 file_attributes |= ATTR_SYSTEM;
ca81983f 1645
2503a0db 1646 req->ImpersonationLevel = IL_IMPERSONATION;
064f6047 1647 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
2503a0db
PS		 1648 /* File attributes ignored on open (used in create though) */
1649 req->FileAttributes = cpu_to_le32(file_attributes);
1650 req->ShareAccess = FILE_SHARE_ALL_LE;
064f6047
PS		 1651 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1652 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
2503a0db
PS		 1653
1654 iov[0].iov_base = (char *)req;
1655 /* 4 for rfc1002 length field */
1656 iov[0].iov_len = get_rfc1002_length(req) + 4;
59aa3718
PS		 1657 /* -1 since last byte is buf[0] which is sent below (path) */
1658 iov[0].iov_len--;
f0712928
AA		 1659
1660 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
1661
1662 /* [MS-SMB2] 2.2.13 NameOffset:
1663 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
1664 * the SMB2 header, the file name includes a prefix that will
1665 * be processed during DFS name normalization as specified in
1666 * section 3.3.5.9. Otherwise, the file name is relative to
1667 * the share that is identified by the TreeId in the SMB2
1668 * header.
1669 */
1670 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
1671 int name_len;
1672
1673 req->hdr.sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
1674 rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
1675 &name_len,
1676 tcon->treeName, path);
1677 if (rc)
1678 return rc;
1679 req->NameLength = cpu_to_le16(name_len * 2);
59aa3718
PS		 1680 uni_path_len = copy_size;
1681 path = copy_path;
f0712928
AA		 1682 } else {
1683 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
1684 /* MUST set path len (NameLength) to 0 opening root of share */
1685 req->NameLength = cpu_to_le16(uni_path_len - 2);
1686 if (uni_path_len % 8 != 0) {
1687 copy_size = roundup(uni_path_len, 8);
1688 copy_path = kzalloc(copy_size, GFP_KERNEL);
1689 if (!copy_path)
1690 return -ENOMEM;
1691 memcpy((char *)copy_path, (const char *)path,
1692 uni_path_len);
1693 uni_path_len = copy_size;
1694 path = copy_path;
1695 }
2503a0db
PS		 1696 }
1697
59aa3718
PS		 1698 iov[1].iov_len = uni_path_len;
1699 iov[1].iov_base = path;
1700 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1701 inc_rfc1001_len(req, uni_path_len - 1);
1702
b8c32dbb
PS		 1703 if (!server->oplocks)
1704 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1705
a41a28bd 1706 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
b8c32dbb
PS		 1707 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1708 req->RequestedOplockLevel = *oplock;
1709 else {
da502f7d 1710 rc = add_lease_context(server, iov, &n_iov, oplock);
d22cbfec 1711 if (rc) {
b8c32dbb
PS		 1712 cifs_small_buf_release(req);
1713 kfree(copy_path);
d22cbfec 1714 return rc;
b8c32dbb 1715 }
da502f7d 1716 lc_buf = iov[n_iov-1].iov_base;
b8c32dbb
PS		 1717 }
1718
63eb3def
PS		 1719 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1720 /* need to set Next field of lease context if we request it */
a41a28bd 1721 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
63eb3def 1722 struct create_context *ccontext =
da502f7d 1723 (struct create_context *)iov[n_iov-1].iov_base;
1c46943f 1724 ccontext->Next =
a41a28bd 1725 cpu_to_le32(server->vals->create_lease_size);
63eb3def 1726 }
b56eae4d 1727
da502f7d 1728 rc = add_durable_context(iov, &n_iov, oparms,
b56eae4d 1729 tcon->use_persistent);
63eb3def
PS		 1730 if (rc) {
1731 cifs_small_buf_release(req);
1732 kfree(copy_path);
663a9621 1733 kfree(lc_buf);
63eb3def
PS		 1734 return rc;
1735 }
da502f7d 1736 dhc_buf = iov[n_iov-1].iov_base;
63eb3def
PS		 1737 }
1738
7fb8986e 1739 rc = SendReceive2(xid, ses, iov, n_iov, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1740 cifs_small_buf_release(req);
1741 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2503a0db
PS		 1742
1743 if (rc != 0) {
1744 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
b42bf888
PS		 1745 if (err_buf)
1746 *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
1747 GFP_KERNEL);
2503a0db
PS		 1748 goto creat_exit;
1749 }
1750
064f6047
PS		 1751 oparms->fid->persistent_fid = rsp->PersistentFileId;
1752 oparms->fid->volatile_fid = rsp->VolatileFileId;
f0df737e
PS		 1753
1754 if (buf) {
1755 memcpy(buf, &rsp->CreationTime, 32);
1756 buf->AllocationSize = rsp->AllocationSize;
1757 buf->EndOfFile = rsp->EndofFile;
1758 buf->Attributes = rsp->FileAttributes;
1759 buf->NumberOfLinks = cpu_to_le32(1);
1760 buf->DeletePending = 0;
1761 }
2e44b288 1762
b8c32dbb 1763 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
42873b0a 1764 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
b8c32dbb
PS		 1765 else
1766 *oplock = rsp->OplockLevel;
2503a0db 1767creat_exit:
b8c32dbb 1768 kfree(copy_path);
663a9621
PS		 1769 kfree(lc_buf);
1770 kfree(dhc_buf);
2503a0db
PS		 1771 free_rsp_buf(resp_buftype, rsp);
1772 return rc;
1773}
1774
4a72dafa
SF		 1775/*
1776 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1777 */
1778int
1779SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
51146625
AA		 1780 u64 volatile_fid, u32 opcode, bool is_fsctl, bool use_ipc,
1781 char *in_data, u32 indatalen,
1782 char **out_data, u32 *plen /* returned data len */)
4a72dafa
SF		 1783{
1784 struct smb2_ioctl_req *req;
1785 struct smb2_ioctl_rsp *rsp;
31473fc4 1786 struct smb2_sync_hdr *shdr;
4a72dafa 1787 struct TCP_Server_Info *server;
8e353106 1788 struct cifs_ses *ses;
4a72dafa 1789 struct kvec iov[2];
da502f7d 1790 struct kvec rsp_iov;
4a72dafa 1791 int resp_buftype;
da502f7d 1792 int n_iov;
4a72dafa 1793 int rc = 0;
7fb8986e 1794 int flags = 0;
4a72dafa
SF		 1795
1796 cifs_dbg(FYI, "SMB2 IOCTL\n");
1797
3d1a3745
SF		 1798 if (out_data != NULL)
1799 *out_data = NULL;
1800
4a72dafa
SF		 1801 /* zero out returned data len, in case of error */
1802 if (plen)
1803 *plen = 0;
1804
8e353106
SF		 1805 if (tcon)
1806 ses = tcon->ses;
1807 else
1808 return -EIO;
1809
4a72dafa
SF		 1810 if (ses && (ses->server))
1811 server = ses->server;
1812 else
1813 return -EIO;
1814
1815 rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req);
1816 if (rc)
1817 return rc;
1818
51146625
AA		 1819 if (use_ipc) {
1820 if (ses->ipc_tid == 0) {
1821 cifs_small_buf_release(req);
1822 return -ENOTCONN;
1823 }
1824
1825 cifs_dbg(FYI, "replacing tid 0x%x with IPC tid 0x%x\n",
1826 req->hdr.sync_hdr.TreeId, ses->ipc_tid);
1827 req->hdr.sync_hdr.TreeId = ses->ipc_tid;
1828 }
7fb8986e
PS		 1829 if (encryption_required(tcon))
1830 flags |= CIFS_TRANSFORM_REQ;
1831
4a72dafa
SF		 1832 req->CtlCode = cpu_to_le32(opcode);
1833 req->PersistentFileId = persistent_fid;
1834 req->VolatileFileId = volatile_fid;
1835
1836 if (indatalen) {
1837 req->InputCount = cpu_to_le32(indatalen);
1838 /* do not set InputOffset if no input data */
1839 req->InputOffset =
1840 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4);
1841 iov[1].iov_base = in_data;
1842 iov[1].iov_len = indatalen;
da502f7d 1843 n_iov = 2;
4a72dafa 1844 } else
da502f7d 1845 n_iov = 1;
4a72dafa
SF		 1846
1847 req->OutputOffset = 0;
1848 req->OutputCount = 0; /* MBZ */
1849
1850 /*
1851 * Could increase MaxOutputResponse, but that would require more
1852 * than one credit. Windows typically sets this smaller, but for some
1853 * ioctls it may be useful to allow server to send more. No point
1854 * limiting what the server can send as long as fits in one credit
1855 */
1856 req->MaxOutputResponse = cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1857
1858 if (is_fsctl)
1859 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
1860 else
1861 req->Flags = 0;
1862
1863 iov[0].iov_base = (char *)req;
4a72dafa 1864
7ff8d45c
SF		 1865 /*
1866 * If no input data, the size of ioctl struct in
1867 * protocol spec still includes a 1 byte data buffer,
1868 * but if input data passed to ioctl, we do not
1869 * want to double count this, so we do not send
1870 * the dummy one byte of data in iovec[0] if sending
1871 * input data (in iovec[1]). We also must add 4 bytes
1872 * in first iovec to allow for rfc1002 length field.
1873 */
1874
1875 if (indatalen) {
1876 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1877 inc_rfc1001_len(req, indatalen - 1);
1878 } else
1879 iov[0].iov_len = get_rfc1002_length(req) + 4;
1880
4a72dafa 1881
7fb8986e 1882 rc = SendReceive2(xid, ses, iov, n_iov, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1883 cifs_small_buf_release(req);
1884 rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
4a72dafa 1885
9bf0c9cd 1886 if ((rc != 0) && (rc != -EINVAL)) {
8e353106 1887 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
4a72dafa 1888 goto ioctl_exit;
9bf0c9cd
SF		 1889 } else if (rc == -EINVAL) {
1890 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
1891 (opcode != FSCTL_SRV_COPYCHUNK)) {
8e353106 1892 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
9bf0c9cd
SF		 1893 goto ioctl_exit;
1894 }
4a72dafa
SF		 1895 }
1896
1897 /* check if caller wants to look at return data or just return rc */
1898 if ((plen == NULL) || (out_data == NULL))
1899 goto ioctl_exit;
1900
1901 *plen = le32_to_cpu(rsp->OutputCount);
1902
1903 /* We check for obvious errors in the output buffer length and offset */
1904 if (*plen == 0)
1905 goto ioctl_exit; /* server returned no data */
1906 else if (*plen > 0xFF00) {
1907 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
1908 *plen = 0;
1909 rc = -EIO;
1910 goto ioctl_exit;
1911 }
1912
1913 if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
1914 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
1915 le32_to_cpu(rsp->OutputOffset));
1916 *plen = 0;
1917 rc = -EIO;
1918 goto ioctl_exit;
1919 }
1920
1921 *out_data = kmalloc(*plen, GFP_KERNEL);
1922 if (*out_data == NULL) {
1923 rc = -ENOMEM;
1924 goto ioctl_exit;
1925 }
1926
31473fc4
PS		 1927 shdr = get_sync_hdr(rsp);
1928 memcpy(*out_data, (char *)shdr + le32_to_cpu(rsp->OutputOffset), *plen);
4a72dafa
SF		 1929ioctl_exit:
1930 free_rsp_buf(resp_buftype, rsp);
1931 return rc;
1932}
1933
64a5cfa6
SF		 1934/*
1935 * Individual callers to ioctl worker function follow
1936 */
1937
1938int
1939SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1940 u64 persistent_fid, u64 volatile_fid)
1941{
1942 int rc;
64a5cfa6
SF		 1943 struct compress_ioctl fsctl_input;
1944 char *ret_data = NULL;
1945
1946 fsctl_input.CompressionState =
bc09d141 1947 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
64a5cfa6
SF		 1948
1949 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1950 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
51146625 1951 false /* use_ipc */,
64a5cfa6
SF		 1952 (char *)&fsctl_input /* data input */,
1953 2 /* in data len */, &ret_data /* out data */, NULL);
1954
1955 cifs_dbg(FYI, "set compression rc %d\n", rc);
64a5cfa6
SF		 1956
1957 return rc;
1958}
1959
2503a0db
PS		 1960int
1961SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1962 u64 persistent_fid, u64 volatile_fid)
1963{
1964 struct smb2_close_req *req;
1965 struct smb2_close_rsp *rsp;
1966 struct TCP_Server_Info *server;
1967 struct cifs_ses *ses = tcon->ses;
1968 struct kvec iov[1];
da502f7d 1969 struct kvec rsp_iov;
2503a0db
PS		 1970 int resp_buftype;
1971 int rc = 0;
7fb8986e 1972 int flags = 0;
2503a0db 1973
f96637be 1974 cifs_dbg(FYI, "Close\n");
2503a0db
PS		 1975
1976 if (ses && (ses->server))
1977 server = ses->server;
1978 else
1979 return -EIO;
1980
1981 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1982 if (rc)
1983 return rc;
1984
7fb8986e
PS		 1985 if (encryption_required(tcon))
1986 flags |= CIFS_TRANSFORM_REQ;
1987
2503a0db
PS		 1988 req->PersistentFileId = persistent_fid;
1989 req->VolatileFileId = volatile_fid;
1990
1991 iov[0].iov_base = (char *)req;
1992 /* 4 for rfc1002 length field */
1993 iov[0].iov_len = get_rfc1002_length(req) + 4;
1994
7fb8986e 1995 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1996 cifs_small_buf_release(req);
1997 rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
2503a0db
PS		 1998
1999 if (rc != 0) {
d4a029d2 2000 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
2503a0db
PS		 2001 goto close_exit;
2002 }
2003
2503a0db
PS		 2004 /* BB FIXME - decode close response, update inode for caching */
2005
2006close_exit:
2007 free_rsp_buf(resp_buftype, rsp);
2008 return rc;
2009}
be4cb9e3
PS		 2010
2011static int
2012validate_buf(unsigned int offset, unsigned int buffer_length,
2013 struct smb2_hdr *hdr, unsigned int min_buf_size)
2014
2015{
2016 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
2017 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
2018 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
2019 char *end_of_buf = begin_of_buf + buffer_length;
2020
2021
2022 if (buffer_length < min_buf_size) {
f96637be
JP		 2023 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
2024 buffer_length, min_buf_size);
be4cb9e3
PS		 2025 return -EINVAL;
2026 }
2027
2028 /* check if beyond RFC1001 maximum length */
2029 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
f96637be
JP		 2030 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
2031 buffer_length, smb_len);
be4cb9e3
PS		 2032 return -EINVAL;
2033 }
2034
2035 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
f96637be 2036 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
be4cb9e3
PS		 2037 return -EINVAL;
2038 }
2039
2040 return 0;
2041}
2042
2043/*
2044 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2045 * Caller must free buffer.
2046 */
2047static int
2048validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
2049 struct smb2_hdr *hdr, unsigned int minbufsize,
2050 char *data)
2051
2052{
2053 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
2054 int rc;
2055
2056 if (!data)
2057 return -EINVAL;
2058
2059 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
2060 if (rc)
2061 return rc;
2062
2063 memcpy(data, begin_of_buf, buffer_length);
2064
2065 return 0;
2066}
2067
f0df737e
PS		 2068static int
2069query_info(const unsigned int xid, struct cifs_tcon *tcon,
2070 u64 persistent_fid, u64 volatile_fid, u8 info_class,
2071 size_t output_len, size_t min_len, void *data)
be4cb9e3
PS		 2072{
2073 struct smb2_query_info_req *req;
2074 struct smb2_query_info_rsp *rsp = NULL;
2075 struct kvec iov[2];
da502f7d 2076 struct kvec rsp_iov;
be4cb9e3
PS		 2077 int rc = 0;
2078 int resp_buftype;
2079 struct TCP_Server_Info *server;
2080 struct cifs_ses *ses = tcon->ses;
7fb8986e 2081 int flags = 0;
be4cb9e3 2082
f96637be 2083 cifs_dbg(FYI, "Query Info\n");
be4cb9e3
PS		 2084
2085 if (ses && (ses->server))
2086 server = ses->server;
2087 else
2088 return -EIO;
2089
2090 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2091 if (rc)
2092 return rc;
2093
7fb8986e
PS		 2094 if (encryption_required(tcon))
2095 flags |= CIFS_TRANSFORM_REQ;
2096
be4cb9e3 2097 req->InfoType = SMB2_O_INFO_FILE;
f0df737e 2098 req->FileInfoClass = info_class;
be4cb9e3
PS		 2099 req->PersistentFileId = persistent_fid;
2100 req->VolatileFileId = volatile_fid;
2101 /* 4 for rfc1002 length field and 1 for Buffer */
2102 req->InputBufferOffset =
2103 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
f0df737e 2104 req->OutputBufferLength = cpu_to_le32(output_len);
be4cb9e3
PS		 2105
2106 iov[0].iov_base = (char *)req;
2107 /* 4 for rfc1002 length field */
2108 iov[0].iov_len = get_rfc1002_length(req) + 4;
2109
7fb8986e 2110 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2111 cifs_small_buf_release(req);
2112 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
e5d04887 2113
be4cb9e3
PS		 2114 if (rc) {
2115 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2116 goto qinf_exit;
2117 }
2118
be4cb9e3
PS		 2119 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
2120 le32_to_cpu(rsp->OutputBufferLength),
f0df737e 2121 &rsp->hdr, min_len, data);
be4cb9e3
PS		 2122
2123qinf_exit:
2124 free_rsp_buf(resp_buftype, rsp);
2125 return rc;
2126}
9094fad1 2127
f0df737e
PS		 2128int
2129SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
2130 u64 persistent_fid, u64 volatile_fid,
2131 struct smb2_file_all_info *data)
2132{
2133 return query_info(xid, tcon, persistent_fid, volatile_fid,
2134 FILE_ALL_INFORMATION,
1bbe4997 2135 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
f0df737e
PS		 2136 sizeof(struct smb2_file_all_info), data);
2137}
2138
2139int
2140SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
2141 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
2142{
2143 return query_info(xid, tcon, persistent_fid, volatile_fid,
2144 FILE_INTERNAL_INFORMATION,
2145 sizeof(struct smb2_file_internal_info),
2146 sizeof(struct smb2_file_internal_info), uniqueid);
2147}
2148
9094fad1
PS		 2149/*
2150 * This is a no-op for now. We're not really interested in the reply, but
2151 * rather in the fact that the server sent one and that server->lstrp
2152 * gets updated.
2153 *
2154 * FIXME: maybe we should consider checking that the reply matches request?
2155 */
2156static void
2157smb2_echo_callback(struct mid_q_entry *mid)
2158{
2159 struct TCP_Server_Info *server = mid->callback_data;
31473fc4 2160 struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
9094fad1
PS		 2161 unsigned int credits_received = 1;
2162
2163 if (mid->mid_state == MID_RESPONSE_RECEIVED)
31473fc4 2164 credits_received = le16_to_cpu(rsp->hdr.sync_hdr.CreditRequest);
9094fad1 2165
5fb4e288 2166 mutex_lock(&server->srv_mutex);
9094fad1 2167 DeleteMidQEntry(mid);
5fb4e288 2168 mutex_unlock(&server->srv_mutex);
9094fad1
PS		 2169 add_credits(server, credits_received, CIFS_ECHO_OP);
2170}
2171
53e0e11e
PS		 2172void smb2_reconnect_server(struct work_struct *work)
2173{
2174 struct TCP_Server_Info *server = container_of(work,
2175 struct TCP_Server_Info, reconnect.work);
2176 struct cifs_ses *ses;
2177 struct cifs_tcon *tcon, *tcon2;
2178 struct list_head tmp_list;
2179 int tcon_exist = false;
2180
2181 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2182 mutex_lock(&server->reconnect_mutex);
2183
2184 INIT_LIST_HEAD(&tmp_list);
2185 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
2186
2187 spin_lock(&cifs_tcp_ses_lock);
2188 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2189 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
96a988ff 2190 if (tcon->need_reconnect || tcon->need_reopen_files) {
53e0e11e
PS		 2191 tcon->tc_count++;
2192 list_add_tail(&tcon->rlist, &tmp_list);
2193 tcon_exist = true;
2194 }
2195 }
2196 }
2197 /*
2198 * Get the reference to server struct to be sure that the last call of
2199 * cifs_put_tcon() in the loop below won't release the server pointer.
2200 */
2201 if (tcon_exist)
2202 server->srv_count++;
2203
2204 spin_unlock(&cifs_tcp_ses_lock);
2205
2206 list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
96a988ff
PS		 2207 if (!smb2_reconnect(SMB2_INTERNAL_CMD, tcon))
2208 cifs_reopen_persistent_handles(tcon);
53e0e11e
PS		 2209 list_del_init(&tcon->rlist);
2210 cifs_put_tcon(tcon);
2211 }
2212
2213 cifs_dbg(FYI, "Reconnecting tcons finished\n");
2214 mutex_unlock(&server->reconnect_mutex);
2215
2216 /* now we can safely release srv struct */
2217 if (tcon_exist)
2218 cifs_put_tcp_session(server, 1);
2219}
2220
9094fad1
PS		 2221int
2222SMB2_echo(struct TCP_Server_Info *server)
2223{
2224 struct smb2_echo_req *req;
2225 int rc = 0;
738f9de5
PS		 2226 struct kvec iov[2];
2227 struct smb_rqst rqst = { .rq_iov = iov,
2228 .rq_nvec = 2 };
9094fad1 2229
f96637be 2230 cifs_dbg(FYI, "In echo request\n");
9094fad1 2231
4fcd1813 2232 if (server->tcpStatus == CifsNeedNegotiate) {
53e0e11e
PS		 2233 /* No need to send echo on newly established connections */
2234 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
2235 return rc;
4fcd1813
SF		 2236 }
2237
9094fad1
PS		 2238 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
2239 if (rc)
2240 return rc;
2241
31473fc4 2242 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
9094fad1 2243
9094fad1 2244 /* 4 for rfc1002 length field */
738f9de5
PS		 2245 iov[0].iov_len = 4;
2246 iov[0].iov_base = (char *)req;
2247 iov[1].iov_len = get_rfc1002_length(req);
2248 iov[1].iov_base = (char *)req + 4;
9094fad1 2249
9b7c18a2
PS		 2250 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
2251 server, CIFS_ECHO_OP);
9094fad1 2252 if (rc)
f96637be 2253 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
9094fad1
PS		 2254
2255 cifs_small_buf_release(req);
2256 return rc;
2257}
7a5cfb19
PS		 2258
2259int
2260SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2261 u64 volatile_fid)
2262{
2263 struct smb2_flush_req *req;
2264 struct TCP_Server_Info *server;
2265 struct cifs_ses *ses = tcon->ses;
2266 struct kvec iov[1];
da502f7d 2267 struct kvec rsp_iov;
7a5cfb19
PS		 2268 int resp_buftype;
2269 int rc = 0;
7fb8986e 2270 int flags = 0;
7a5cfb19 2271
f96637be 2272 cifs_dbg(FYI, "Flush\n");
7a5cfb19
PS		 2273
2274 if (ses && (ses->server))
2275 server = ses->server;
2276 else
2277 return -EIO;
2278
2279 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
2280 if (rc)
2281 return rc;
2282
7fb8986e
PS		 2283 if (encryption_required(tcon))
2284 flags |= CIFS_TRANSFORM_REQ;
2285
7a5cfb19
PS		 2286 req->PersistentFileId = persistent_fid;
2287 req->VolatileFileId = volatile_fid;
2288
2289 iov[0].iov_base = (char *)req;
2290 /* 4 for rfc1002 length field */
2291 iov[0].iov_len = get_rfc1002_length(req) + 4;
2292
7fb8986e 2293 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d 2294 cifs_small_buf_release(req);
7a5cfb19 2295
dfebe400 2296 if (rc != 0)
7a5cfb19
PS		 2297 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
2298
da502f7d 2299 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
7a5cfb19
PS		 2300 return rc;
2301}
09a4707e
PS		 2302
2303/*
2304 * To form a chain of read requests, any read requests after the first should
2305 * have the end_of_chain boolean set to true.
2306 */
2307static int
738f9de5
PS		 2308smb2_new_read_req(void **buf, unsigned int *total_len,
2309 struct cifs_io_parms *io_parms, unsigned int remaining_bytes,
2310 int request_type)
09a4707e
PS		 2311{
2312 int rc = -EACCES;
b8f57ee8 2313 struct smb2_read_plain_req *req = NULL;
31473fc4 2314 struct smb2_sync_hdr *shdr;
09a4707e 2315
b8f57ee8
PS		 2316 rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
2317 total_len);
09a4707e
PS		 2318 if (rc)
2319 return rc;
2320 if (io_parms->tcon->ses->server == NULL)
2321 return -ECONNABORTED;
2322
b8f57ee8 2323 shdr = &req->sync_hdr;
31473fc4 2324 shdr->ProcessId = cpu_to_le32(io_parms->pid);
09a4707e
PS		 2325
2326 req->PersistentFileId = io_parms->persistent_fid;
2327 req->VolatileFileId = io_parms->volatile_fid;
2328 req->ReadChannelInfoOffset = 0; /* reserved */
2329 req->ReadChannelInfoLength = 0; /* reserved */
2330 req->Channel = 0; /* reserved */
2331 req->MinimumCount = 0;
2332 req->Length = cpu_to_le32(io_parms->length);
2333 req->Offset = cpu_to_le64(io_parms->offset);
2334
2335 if (request_type & CHAINED_REQUEST) {
2336 if (!(request_type & END_OF_CHAIN)) {
b8f57ee8
PS		 2337 /* next 8-byte aligned request */
2338 *total_len = DIV_ROUND_UP(*total_len, 8) * 8;
2339 shdr->NextCommand = cpu_to_le32(*total_len);
09a4707e 2340 } else /* END_OF_CHAIN */
31473fc4 2341 shdr->NextCommand = 0;
09a4707e 2342 if (request_type & RELATED_REQUEST) {
31473fc4 2343 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
09a4707e
PS		 2344 /*
2345 * Related requests use info from previous read request
2346 * in chain.
2347 */
31473fc4
PS		 2348 shdr->SessionId = 0xFFFFFFFF;
2349 shdr->TreeId = 0xFFFFFFFF;
09a4707e
PS		 2350 req->PersistentFileId = 0xFFFFFFFF;
2351 req->VolatileFileId = 0xFFFFFFFF;
2352 }
2353 }
2354 if (remaining_bytes > io_parms->length)
2355 req->RemainingBytes = cpu_to_le32(remaining_bytes);
2356 else
2357 req->RemainingBytes = 0;
2358
738f9de5 2359 *buf = req;
09a4707e
PS		 2360 return rc;
2361}
2362
2363static void
2364smb2_readv_callback(struct mid_q_entry *mid)
2365{
2366 struct cifs_readdata *rdata = mid->callback_data;
2367 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
2368 struct TCP_Server_Info *server = tcon->ses->server;
738f9de5
PS		 2369 struct smb2_sync_hdr *shdr =
2370 (struct smb2_sync_hdr *)rdata->iov[1].iov_base;
09a4707e 2371 unsigned int credits_received = 1;
738f9de5
PS		 2372 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2373 .rq_nvec = 2,
8321fec4
JL		 2374 .rq_pages = rdata->pages,
2375 .rq_npages = rdata->nr_pages,
2376 .rq_pagesz = rdata->pagesz,
2377 .rq_tailsz = rdata->tailsz };
09a4707e 2378
f96637be
JP		 2379 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2380 __func__, mid->mid, mid->mid_state, rdata->result,
2381 rdata->bytes);
09a4707e
PS		 2382
2383 switch (mid->mid_state) {
2384 case MID_RESPONSE_RECEIVED:
31473fc4 2385 credits_received = le16_to_cpu(shdr->CreditRequest);
09a4707e 2386 /* result already set, check signature */
4326ed2f 2387 if (server->sign && !mid->decrypted) {
3c1bf7e4
PS		 2388 int rc;
2389
0b688cfc 2390 rc = smb2_verify_signature(&rqst, server);
3c1bf7e4 2391 if (rc)
f96637be
JP		 2392 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
2393 rc);
3c1bf7e4 2394 }
09a4707e 2395 /* FIXME: should this be counted toward the initiating task? */
34a54d61
PS		 2396 task_io_account_read(rdata->got_bytes);
2397 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 2398 break;
2399 case MID_REQUEST_SUBMITTED:
2400 case MID_RETRY_NEEDED:
2401 rdata->result = -EAGAIN;
d913ed17
PS		 2402 if (server->sign && rdata->got_bytes)
2403 /* reset bytes number since we can not check a sign */
2404 rdata->got_bytes = 0;
2405 /* FIXME: should this be counted toward the initiating task? */
2406 task_io_account_read(rdata->got_bytes);
2407 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 2408 break;
2409 default:
2410 if (rdata->result != -ENODATA)
2411 rdata->result = -EIO;
2412 }
2413
2414 if (rdata->result)
2415 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
2416
2417 queue_work(cifsiod_wq, &rdata->work);
5fb4e288 2418 mutex_lock(&server->srv_mutex);
09a4707e 2419 DeleteMidQEntry(mid);
5fb4e288 2420 mutex_unlock(&server->srv_mutex);
09a4707e
PS		 2421 add_credits(server, credits_received, 0);
2422}
2423
738f9de5 2424/* smb2_async_readv - send an async read, and set up mid to handle result */
09a4707e
PS		 2425int
2426smb2_async_readv(struct cifs_readdata *rdata)
2427{
bed9da02 2428 int rc, flags = 0;
31473fc4
PS		 2429 char *buf;
2430 struct smb2_sync_hdr *shdr;
09a4707e 2431 struct cifs_io_parms io_parms;
738f9de5
PS		 2432 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2433 .rq_nvec = 2 };
bed9da02 2434 struct TCP_Server_Info *server;
738f9de5 2435 unsigned int total_len;
b8f57ee8 2436 __be32 req_len;
09a4707e 2437
f96637be
JP		 2438 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
2439 __func__, rdata->offset, rdata->bytes);
09a4707e
PS		 2440
2441 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
2442 io_parms.offset = rdata->offset;
2443 io_parms.length = rdata->bytes;
2444 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
2445 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
2446 io_parms.pid = rdata->pid;
bed9da02
PS		 2447
2448 server = io_parms.tcon->ses->server;
2449
738f9de5 2450 rc = smb2_new_read_req((void **) &buf, &total_len, &io_parms, 0, 0);
bed9da02
PS		 2451 if (rc) {
2452 if (rc == -EAGAIN && rdata->credits) {
2453 /* credits was reset by reconnect */
2454 rdata->credits = 0;
2455 /* reduce in_flight value since we won't send the req */
2456 spin_lock(&server->req_lock);
2457 server->in_flight--;
2458 spin_unlock(&server->req_lock);
2459 }
09a4707e 2460 return rc;
bed9da02 2461 }
09a4707e 2462
7fb8986e
PS		 2463 if (encryption_required(io_parms.tcon))
2464 flags |= CIFS_TRANSFORM_REQ;
2465
b8f57ee8
PS		 2466 req_len = cpu_to_be32(total_len);
2467
2468 rdata->iov[0].iov_base = &req_len;
2469 rdata->iov[0].iov_len = sizeof(__be32);
2470 rdata->iov[1].iov_base = buf;
2471 rdata->iov[1].iov_len = total_len;
2472
2473 shdr = (struct smb2_sync_hdr *)buf;
09a4707e 2474
bed9da02 2475 if (rdata->credits) {
31473fc4 2476 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
bed9da02 2477 SMB2_MAX_BUFFER_SIZE));
31473fc4 2478 shdr->CreditRequest = shdr->CreditCharge;
bed9da02
PS		 2479 spin_lock(&server->req_lock);
2480 server->credits += rdata->credits -
31473fc4 2481 le16_to_cpu(shdr->CreditCharge);
bed9da02
PS		 2482 spin_unlock(&server->req_lock);
2483 wake_up(&server->request_q);
7fb8986e 2484 flags |= CIFS_HAS_CREDITS;
bed9da02
PS		 2485 }
2486
09a4707e 2487 kref_get(&rdata->refcount);
fec344e3 2488 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
09a4707e 2489 cifs_readv_receive, smb2_readv_callback,
4326ed2f 2490 smb3_handle_read_data, rdata, flags);
e5d04887 2491 if (rc) {
09a4707e 2492 kref_put(&rdata->refcount, cifs_readdata_release);
e5d04887
PS		 2493 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
2494 }
09a4707e
PS		 2495
2496 cifs_small_buf_release(buf);
2497 return rc;
2498}
33319141 2499
d8e05039
PS		 2500int
2501SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
2502 unsigned int *nbytes, char **buf, int *buf_type)
2503{
2504 int resp_buftype, rc = -EACCES;
b8f57ee8 2505 struct smb2_read_plain_req *req = NULL;
d8e05039 2506 struct smb2_read_rsp *rsp = NULL;
31473fc4 2507 struct smb2_sync_hdr *shdr;
b8f57ee8 2508 struct kvec iov[2];
da502f7d 2509 struct kvec rsp_iov;
738f9de5 2510 unsigned int total_len;
b8f57ee8
PS		 2511 __be32 req_len;
2512 struct smb_rqst rqst = { .rq_iov = iov,
2513 .rq_nvec = 2 };
7fb8986e
PS		 2514 int flags = CIFS_LOG_ERROR;
2515 struct cifs_ses *ses = io_parms->tcon->ses;
d8e05039
PS		 2516
2517 *nbytes = 0;
738f9de5 2518 rc = smb2_new_read_req((void **)&req, &total_len, io_parms, 0, 0);
d8e05039
PS		 2519 if (rc)
2520 return rc;
2521
7fb8986e
PS		 2522 if (encryption_required(io_parms->tcon))
2523 flags |= CIFS_TRANSFORM_REQ;
2524
b8f57ee8 2525 req_len = cpu_to_be32(total_len);
738f9de5 2526
b8f57ee8
PS		 2527 iov[0].iov_base = &req_len;
2528 iov[0].iov_len = sizeof(__be32);
2529 iov[1].iov_base = req;
2530 iov[1].iov_len = total_len;
2531
7fb8986e 2532 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
b8f57ee8 2533 cifs_small_buf_release(req);
d8e05039 2534
da502f7d 2535 rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
31473fc4 2536 shdr = get_sync_hdr(rsp);
d8e05039 2537
31473fc4 2538 if (shdr->Status == STATUS_END_OF_FILE) {
da502f7d 2539 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
d8e05039
PS		 2540 return 0;
2541 }
2542
2543 if (rc) {
2544 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
f96637be 2545 cifs_dbg(VFS, "Send error in read = %d\n", rc);
d8e05039
PS		 2546 } else {
2547 *nbytes = le32_to_cpu(rsp->DataLength);
2548 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
2549 (*nbytes > io_parms->length)) {
f96637be
JP		 2550 cifs_dbg(FYI, "bad length %d for count %d\n",
2551 *nbytes, io_parms->length);
d8e05039
PS		 2552 rc = -EIO;
2553 *nbytes = 0;
2554 }
2555 }
2556
2557 if (*buf) {
31473fc4 2558 memcpy(*buf, (char *)shdr + rsp->DataOffset, *nbytes);
da502f7d 2559 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
d8e05039 2560 } else if (resp_buftype != CIFS_NO_BUFFER) {
da502f7d 2561 *buf = rsp_iov.iov_base;
d8e05039
PS		 2562 if (resp_buftype == CIFS_SMALL_BUFFER)
2563 *buf_type = CIFS_SMALL_BUFFER;
2564 else if (resp_buftype == CIFS_LARGE_BUFFER)
2565 *buf_type = CIFS_LARGE_BUFFER;
2566 }
2567 return rc;
2568}
2569
33319141
PS		 2570/*
2571 * Check the mid_state and signature on received buffer (if any), and queue the
2572 * workqueue completion task.
2573 */
2574static void
2575smb2_writev_callback(struct mid_q_entry *mid)
2576{
2577 struct cifs_writedata *wdata = mid->callback_data;
2578 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
5fb4e288 2579 struct TCP_Server_Info *server = tcon->ses->server;
33319141
PS		 2580 unsigned int written;
2581 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
2582 unsigned int credits_received = 1;
2583
2584 switch (mid->mid_state) {
2585 case MID_RESPONSE_RECEIVED:
31473fc4 2586 credits_received = le16_to_cpu(rsp->hdr.sync_hdr.CreditRequest);
33319141
PS		 2587 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
2588 if (wdata->result != 0)
2589 break;
2590
2591 written = le32_to_cpu(rsp->DataLength);
2592 /*
2593 * Mask off high 16 bits when bytes written as returned
2594 * by the server is greater than bytes requested by the
2595 * client. OS/2 servers are known to set incorrect
2596 * CountHigh values.
2597 */
2598 if (written > wdata->bytes)
2599 written &= 0xFFFF;
2600
2601 if (written < wdata->bytes)
2602 wdata->result = -ENOSPC;
2603 else
2604 wdata->bytes = written;
2605 break;
2606 case MID_REQUEST_SUBMITTED:
2607 case MID_RETRY_NEEDED:
2608 wdata->result = -EAGAIN;
2609 break;
2610 default:
2611 wdata->result = -EIO;
2612 break;
2613 }
2614
2615 if (wdata->result)
2616 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2617
2618 queue_work(cifsiod_wq, &wdata->work);
5fb4e288 2619 mutex_lock(&server->srv_mutex);
33319141 2620 DeleteMidQEntry(mid);
5fb4e288 2621 mutex_unlock(&server->srv_mutex);
33319141
PS		 2622 add_credits(tcon->ses->server, credits_received, 0);
2623}
2624
2625/* smb2_async_writev - send an async write, and set up mid to handle result */
2626int
4a5c80d7
SF		 2627smb2_async_writev(struct cifs_writedata *wdata,
2628 void (*release)(struct kref *kref))
33319141 2629{
cb7e9eab 2630 int rc = -EACCES, flags = 0;
33319141 2631 struct smb2_write_req *req = NULL;
31473fc4 2632 struct smb2_sync_hdr *shdr;
33319141 2633 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
cb7e9eab 2634 struct TCP_Server_Info *server = tcon->ses->server;
738f9de5
PS		 2635 struct kvec iov[2];
2636 struct smb_rqst rqst = { };
33319141
PS		 2637
2638 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
cb7e9eab
PS		 2639 if (rc) {
2640 if (rc == -EAGAIN && wdata->credits) {
2641 /* credits was reset by reconnect */
2642 wdata->credits = 0;
2643 /* reduce in_flight value since we won't send the req */
2644 spin_lock(&server->req_lock);
2645 server->in_flight--;
2646 spin_unlock(&server->req_lock);
2647 }
33319141 2648 goto async_writev_out;
cb7e9eab 2649 }
33319141 2650
7fb8986e
PS		 2651 if (encryption_required(tcon))
2652 flags |= CIFS_TRANSFORM_REQ;
2653
31473fc4
PS		 2654 shdr = get_sync_hdr(req);
2655 shdr->ProcessId = cpu_to_le32(wdata->cfile->pid);
33319141
PS		 2656
2657 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
2658 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
2659 req->WriteChannelInfoOffset = 0;
2660 req->WriteChannelInfoLength = 0;
2661 req->Channel = 0;
2662 req->Offset = cpu_to_le64(wdata->offset);
2663 /* 4 for rfc1002 length field */
2664 req->DataOffset = cpu_to_le16(
2665 offsetof(struct smb2_write_req, Buffer) - 4);
2666 req->RemainingBytes = 0;
2667
2668 /* 4 for rfc1002 length field and 1 for Buffer */
738f9de5
PS		 2669 iov[0].iov_len = 4;
2670 iov[0].iov_base = req;
2671 iov[1].iov_len = get_rfc1002_length(req) - 1;
2672 iov[1].iov_base = (char *)req + 4;
33319141 2673
738f9de5
PS		 2674 rqst.rq_iov = iov;
2675 rqst.rq_nvec = 2;
eddb079d
JL		 2676 rqst.rq_pages = wdata->pages;
2677 rqst.rq_npages = wdata->nr_pages;
2678 rqst.rq_pagesz = wdata->pagesz;
2679 rqst.rq_tailsz = wdata->tailsz;
33319141 2680
f96637be
JP		 2681 cifs_dbg(FYI, "async write at %llu %u bytes\n",
2682 wdata->offset, wdata->bytes);
33319141
PS		 2683
2684 req->Length = cpu_to_le32(wdata->bytes);
2685
2686 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
2687
cb7e9eab 2688 if (wdata->credits) {
31473fc4 2689 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
cb7e9eab 2690 SMB2_MAX_BUFFER_SIZE));
31473fc4 2691 shdr->CreditRequest = shdr->CreditCharge;
cb7e9eab
PS		 2692 spin_lock(&server->req_lock);
2693 server->credits += wdata->credits -
31473fc4 2694 le16_to_cpu(shdr->CreditCharge);
cb7e9eab
PS		 2695 spin_unlock(&server->req_lock);
2696 wake_up(&server->request_q);
7fb8986e 2697 flags |= CIFS_HAS_CREDITS;
cb7e9eab
PS		 2698 }
2699
33319141 2700 kref_get(&wdata->refcount);
9b7c18a2
PS		 2701 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
2702 wdata, flags);
33319141 2703
e5d04887 2704 if (rc) {
4a5c80d7 2705 kref_put(&wdata->refcount, release);
e5d04887
PS		 2706 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2707 }
33319141 2708
33319141
PS		 2709async_writev_out:
2710 cifs_small_buf_release(req);
33319141
PS		 2711 return rc;
2712}
009d3443
PS		 2713
2714/*
2715 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2716 * The length field from io_parms must be at least 1 and indicates a number of
2717 * elements with data to write that begins with position 1 in iov array. All
2718 * data length is specified by count.
2719 */
2720int
2721SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
2722 unsigned int *nbytes, struct kvec *iov, int n_vec)
2723{
2724 int rc = 0;
2725 struct smb2_write_req *req = NULL;
2726 struct smb2_write_rsp *rsp = NULL;
2727 int resp_buftype;
da502f7d 2728 struct kvec rsp_iov;
7fb8986e 2729 int flags = 0;
da502f7d 2730
009d3443
PS		 2731 *nbytes = 0;
2732
2733 if (n_vec < 1)
2734 return rc;
2735
2736 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
2737 if (rc)
2738 return rc;
2739
2740 if (io_parms->tcon->ses->server == NULL)
2741 return -ECONNABORTED;
2742
7fb8986e
PS		 2743 if (encryption_required(io_parms->tcon))
2744 flags |= CIFS_TRANSFORM_REQ;
2745
31473fc4 2746 req->hdr.sync_hdr.ProcessId = cpu_to_le32(io_parms->pid);
009d3443
PS		 2747
2748 req->PersistentFileId = io_parms->persistent_fid;
2749 req->VolatileFileId = io_parms->volatile_fid;
2750 req->WriteChannelInfoOffset = 0;
2751 req->WriteChannelInfoLength = 0;
2752 req->Channel = 0;
2753 req->Length = cpu_to_le32(io_parms->length);
2754 req->Offset = cpu_to_le64(io_parms->offset);
2755 /* 4 for rfc1002 length field */
2756 req->DataOffset = cpu_to_le16(
2757 offsetof(struct smb2_write_req, Buffer) - 4);
2758 req->RemainingBytes = 0;
2759
2760 iov[0].iov_base = (char *)req;
2761 /* 4 for rfc1002 length field and 1 for Buffer */
2762 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2763
2764 /* length of entire message including data to be written */
2765 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
2766
2767 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
7fb8986e 2768 &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2769 cifs_small_buf_release(req);
2770 rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
009d3443
PS		 2771
2772 if (rc) {
2773 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
f96637be 2774 cifs_dbg(VFS, "Send error in write = %d\n", rc);
e5d04887 2775 } else
009d3443 2776 *nbytes = le32_to_cpu(rsp->DataLength);
e5d04887
PS		 2777
2778 free_rsp_buf(resp_buftype, rsp);
009d3443
PS		 2779 return rc;
2780}
35143eb5 2781
d324f08d
PS		 2782static unsigned int
2783num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
2784{
2785 int len;
2786 unsigned int entrycount = 0;
2787 unsigned int next_offset = 0;
2788 FILE_DIRECTORY_INFO *entryptr;
2789
2790 if (bufstart == NULL)
2791 return 0;
2792
2793 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
2794
2795 while (1) {
2796 entryptr = (FILE_DIRECTORY_INFO *)
2797 ((char *)entryptr + next_offset);
2798
2799 if ((char *)entryptr + size > end_of_buf) {
f96637be 2800 cifs_dbg(VFS, "malformed search entry would overflow\n");
d324f08d
PS		 2801 break;
2802 }
2803
2804 len = le32_to_cpu(entryptr->FileNameLength);
2805 if ((char *)entryptr + len + size > end_of_buf) {
f96637be
JP		 2806 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
2807 end_of_buf);
d324f08d
PS		 2808 break;
2809 }
2810
2811 *lastentry = (char *)entryptr;
2812 entrycount++;
2813
2814 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
2815 if (!next_offset)
2816 break;
2817 }
2818
2819 return entrycount;
2820}
2821
2822/*
2823 * Readdir/FindFirst
2824 */
2825int
2826SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
2827 u64 persistent_fid, u64 volatile_fid, int index,
2828 struct cifs_search_info *srch_inf)
2829{
2830 struct smb2_query_directory_req *req;
2831 struct smb2_query_directory_rsp *rsp = NULL;
2832 struct kvec iov[2];
da502f7d 2833 struct kvec rsp_iov;
d324f08d
PS		 2834 int rc = 0;
2835 int len;
75fdfc84 2836 int resp_buftype = CIFS_NO_BUFFER;
d324f08d
PS		 2837 unsigned char *bufptr;
2838 struct TCP_Server_Info *server;
2839 struct cifs_ses *ses = tcon->ses;
2840 __le16 asteriks = cpu_to_le16('*');
2841 char *end_of_smb;
2842 unsigned int output_size = CIFSMaxBufSize;
2843 size_t info_buf_size;
7fb8986e 2844 int flags = 0;
d324f08d
PS		 2845
2846 if (ses && (ses->server))
2847 server = ses->server;
2848 else
2849 return -EIO;
2850
2851 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
2852 if (rc)
2853 return rc;
2854
7fb8986e
PS		 2855 if (encryption_required(tcon))
2856 flags |= CIFS_TRANSFORM_REQ;
2857
d324f08d
PS		 2858 switch (srch_inf->info_level) {
2859 case SMB_FIND_FILE_DIRECTORY_INFO:
2860 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
2861 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
2862 break;
2863 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
2864 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
2865 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
2866 break;
2867 default:
f96637be
JP		 2868 cifs_dbg(VFS, "info level %u isn't supported\n",
2869 srch_inf->info_level);
d324f08d
PS		 2870 rc = -EINVAL;
2871 goto qdir_exit;
2872 }
2873
2874 req->FileIndex = cpu_to_le32(index);
2875 req->PersistentFileId = persistent_fid;
2876 req->VolatileFileId = volatile_fid;
2877
2878 len = 0x2;
2879 bufptr = req->Buffer;
2880 memcpy(bufptr, &asteriks, len);
2881
2882 req->FileNameOffset =
2883 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
2884 req->FileNameLength = cpu_to_le16(len);
2885 /*
2886 * BB could be 30 bytes or so longer if we used SMB2 specific
2887 * buffer lengths, but this is safe and close enough.
2888 */
2889 output_size = min_t(unsigned int, output_size, server->maxBuf);
2890 output_size = min_t(unsigned int, output_size, 2 << 15);
2891 req->OutputBufferLength = cpu_to_le32(output_size);
2892
2893 iov[0].iov_base = (char *)req;
2894 /* 4 for RFC1001 length and 1 for Buffer */
2895 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2896
2897 iov[1].iov_base = (char *)(req->Buffer);
2898 iov[1].iov_len = len;
2899
2900 inc_rfc1001_len(req, len - 1 /* Buffer */);
2901
7fb8986e 2902 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2903 cifs_small_buf_release(req);
2904 rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
e5d04887 2905
d324f08d 2906 if (rc) {
31473fc4
PS		 2907 if (rc == -ENODATA &&
2908 rsp->hdr.sync_hdr.Status == STATUS_NO_MORE_FILES) {
52755808
PS		 2909 srch_inf->endOfSearch = true;
2910 rc = 0;
2911 }
d324f08d
PS		 2912 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
2913 goto qdir_exit;
2914 }
d324f08d
PS		 2915
2916 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2917 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2918 info_buf_size);
2919 if (rc)
2920 goto qdir_exit;
2921
2922 srch_inf->unicode = true;
2923
2924 if (srch_inf->ntwrk_buf_start) {
2925 if (srch_inf->smallBuf)
2926 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
2927 else
2928 cifs_buf_release(srch_inf->ntwrk_buf_start);
2929 }
2930 srch_inf->ntwrk_buf_start = (char *)rsp;
2931 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
2932 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
2933 /* 4 for rfc1002 length field */
2934 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
2935 srch_inf->entries_in_buffer =
2936 num_entries(srch_inf->srch_entries_start, end_of_smb,
2937 &srch_inf->last_entry, info_buf_size);
2938 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
f96637be
JP		 2939 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
2940 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
2941 srch_inf->srch_entries_start, srch_inf->last_entry);
d324f08d
PS		 2942 if (resp_buftype == CIFS_LARGE_BUFFER)
2943 srch_inf->smallBuf = false;
2944 else if (resp_buftype == CIFS_SMALL_BUFFER)
2945 srch_inf->smallBuf = true;
2946 else
f96637be 2947 cifs_dbg(VFS, "illegal search buffer type\n");
d324f08d 2948
d324f08d
PS		 2949 return rc;
2950
2951qdir_exit:
2952 free_rsp_buf(resp_buftype, rsp);
2953 return rc;
2954}
2955
35143eb5
PS		 2956static int
2957send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
c839ff24 2958 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
35143eb5
PS		 2959 unsigned int num, void **data, unsigned int *size)
2960{
2961 struct smb2_set_info_req *req;
2962 struct smb2_set_info_rsp *rsp = NULL;
2963 struct kvec *iov;
da502f7d 2964 struct kvec rsp_iov;
35143eb5
PS		 2965 int rc = 0;
2966 int resp_buftype;
2967 unsigned int i;
2968 struct TCP_Server_Info *server;
2969 struct cifs_ses *ses = tcon->ses;
7fb8986e 2970 int flags = 0;
35143eb5
PS		 2971
2972 if (ses && (ses->server))
2973 server = ses->server;
2974 else
2975 return -EIO;
2976
2977 if (!num)
2978 return -EINVAL;
2979
2980 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
2981 if (!iov)
2982 return -ENOMEM;
2983
2984 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
2985 if (rc) {
2986 kfree(iov);
2987 return rc;
2988 }
2989
7fb8986e
PS		 2990 if (encryption_required(tcon))
2991 flags |= CIFS_TRANSFORM_REQ;
2992
31473fc4 2993 req->hdr.sync_hdr.ProcessId = cpu_to_le32(pid);
c839ff24 2994
35143eb5
PS		 2995 req->InfoType = SMB2_O_INFO_FILE;
2996 req->FileInfoClass = info_class;
2997 req->PersistentFileId = persistent_fid;
2998 req->VolatileFileId = volatile_fid;
2999
3000 /* 4 for RFC1001 length and 1 for Buffer */
3001 req->BufferOffset =
3002 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
3003 req->BufferLength = cpu_to_le32(*size);
3004
3005 inc_rfc1001_len(req, *size - 1 /* Buffer */);
3006
3007 memcpy(req->Buffer, *data, *size);
3008
3009 iov[0].iov_base = (char *)req;
3010 /* 4 for RFC1001 length */
3011 iov[0].iov_len = get_rfc1002_length(req) + 4;
3012
3013 for (i = 1; i < num; i++) {
3014 inc_rfc1001_len(req, size[i]);
3015 le32_add_cpu(&req->BufferLength, size[i]);
3016 iov[i].iov_base = (char *)data[i];
3017 iov[i].iov_len = size[i];
3018 }
3019
7fb8986e 3020 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 3021 cifs_small_buf_release(req);
3022 rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
35143eb5 3023
7d3fb24b 3024 if (rc != 0)
35143eb5 3025 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
7d3fb24b 3026
35143eb5
PS		 3027 free_rsp_buf(resp_buftype, rsp);
3028 kfree(iov);
3029 return rc;
3030}
3031
3032int
3033SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
3034 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3035{
3036 struct smb2_file_rename_info info;
3037 void **data;
3038 unsigned int size[2];
3039 int rc;
3040 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3041
3042 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
3043 if (!data)
3044 return -ENOMEM;
3045
3046 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
3047 /* 0 = fail if target already exists */
3048 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3049 info.FileNameLength = cpu_to_le32(len);
3050
3051 data[0] = &info;
3052 size[0] = sizeof(struct smb2_file_rename_info);
3053
3054 data[1] = target_file;
3055 size[1] = len + 2 /* null */;
3056
3057 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
c839ff24
PS		 3058 current->tgid, FILE_RENAME_INFORMATION, 2, data,
3059 size);
35143eb5
PS		 3060 kfree(data);
3061 return rc;
3062}
568798cc 3063
897fba11
SF		 3064int
3065SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
3066 u64 persistent_fid, u64 volatile_fid)
3067{
3068 __u8 delete_pending = 1;
3069 void *data;
3070 unsigned int size;
3071
3072 data = &delete_pending;
3073 size = 1; /* sizeof __u8 */
3074
3075 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3076 current->tgid, FILE_DISPOSITION_INFORMATION, 1, &data,
3077 &size);
3078}
3079
568798cc
PS		 3080int
3081SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
3082 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3083{
3084 struct smb2_file_link_info info;
3085 void **data;
3086 unsigned int size[2];
3087 int rc;
3088 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3089
3090 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
3091 if (!data)
3092 return -ENOMEM;
3093
3094 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
3095 /* 0 = fail if link already exists */
3096 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3097 info.FileNameLength = cpu_to_le32(len);
3098
3099 data[0] = &info;
3100 size[0] = sizeof(struct smb2_file_link_info);
3101
3102 data[1] = target_file;
3103 size[1] = len + 2 /* null */;
3104
3105 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
c839ff24 3106 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
568798cc
PS		 3107 kfree(data);
3108 return rc;
3109}
c839ff24
PS		 3110
3111int
3112SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
f29ebb47 3113 u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc)
c839ff24
PS		 3114{
3115 struct smb2_file_eof_info info;
3116 void *data;
3117 unsigned int size;
3118
3119 info.EndOfFile = *eof;
3120
3121 data = &info;
3122 size = sizeof(struct smb2_file_eof_info);
3123
f29ebb47
SF		 3124 if (is_falloc)
3125 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3126 pid, FILE_ALLOCATION_INFORMATION, 1, &data, &size);
3127 else
3128 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3129 pid, FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
c839ff24 3130}
1feeaac7
PS		 3131
3132int
3133SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
3134 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
3135{
3136 unsigned int size;
3137 size = sizeof(FILE_BASIC_INFO);
3138 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3139 current->tgid, FILE_BASIC_INFORMATION, 1,
3140 (void **)&buf, &size);
3141}
983c88a4
PS		 3142
3143int
3144SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
3145 const u64 persistent_fid, const u64 volatile_fid,
3146 __u8 oplock_level)
3147{
3148 int rc;
3149 struct smb2_oplock_break *req = NULL;
7fb8986e 3150 int flags = CIFS_OBREAK_OP;
983c88a4 3151
f96637be 3152 cifs_dbg(FYI, "SMB2_oplock_break\n");
983c88a4 3153 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
983c88a4
PS		 3154 if (rc)
3155 return rc;
3156
7fb8986e
PS		 3157 if (encryption_required(tcon))
3158 flags |= CIFS_TRANSFORM_REQ;
3159
983c88a4
PS		 3160 req->VolatileFid = volatile_fid;
3161 req->PersistentFid = persistent_fid;
3162 req->OplockLevel = oplock_level;
31473fc4 3163 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
983c88a4 3164
7fb8986e 3165 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, flags);
da502f7d 3166 cifs_small_buf_release(req);
983c88a4
PS		 3167
3168 if (rc) {
3169 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 3170 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
983c88a4
PS		 3171 }
3172
3173 return rc;
3174}
6fc05c25
PS		 3175
3176static void
3177copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
3178 struct kstatfs *kst)
3179{
3180 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
3181 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
3182 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
3183 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
3184 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
3185 return;
3186}
3187
3188static int
3189build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
3190 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
3191{
3192 int rc;
3193 struct smb2_query_info_req *req;
3194
f96637be 3195 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
6fc05c25
PS		 3196
3197 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
3198 return -EIO;
3199
3200 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
3201 if (rc)
3202 return rc;
3203
3204 req->InfoType = SMB2_O_INFO_FILESYSTEM;
3205 req->FileInfoClass = level;
3206 req->PersistentFileId = persistent_fid;
3207 req->VolatileFileId = volatile_fid;
3208 /* 4 for rfc1002 length field and 1 for pad */
3209 req->InputBufferOffset =
3210 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
3211 req->OutputBufferLength = cpu_to_le32(
3212 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
3213
3214 iov->iov_base = (char *)req;
3215 /* 4 for rfc1002 length field */
3216 iov->iov_len = get_rfc1002_length(req) + 4;
3217 return 0;
3218}
3219
3220int
3221SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
3222 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
3223{
3224 struct smb2_query_info_rsp *rsp = NULL;
3225 struct kvec iov;
da502f7d 3226 struct kvec rsp_iov;
6fc05c25
PS		 3227 int rc = 0;
3228 int resp_buftype;
3229 struct cifs_ses *ses = tcon->ses;
3230 struct smb2_fs_full_size_info *info = NULL;
7fb8986e 3231 int flags = 0;
6fc05c25
PS		 3232
3233 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
3234 sizeof(struct smb2_fs_full_size_info),
3235 persistent_fid, volatile_fid);
3236 if (rc)
3237 return rc;
3238
7fb8986e
PS		 3239 if (encryption_required(tcon))
3240 flags |= CIFS_TRANSFORM_REQ;
3241
3242 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d 3243 cifs_small_buf_release(iov.iov_base);
6fc05c25
PS		 3244 if (rc) {
3245 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
34f62640 3246 goto qfsinf_exit;
6fc05c25 3247 }
da502f7d 3248 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
6fc05c25
PS		 3249
3250 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
3251 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
3252 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
3253 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
3254 sizeof(struct smb2_fs_full_size_info));
3255 if (!rc)
3256 copy_fs_info_to_kstatfs(info, fsdata);
3257
34f62640 3258qfsinf_exit:
da502f7d 3259 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
34f62640
SF		 3260 return rc;
3261}
3262
3263int
3264SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2167114c 3265 u64 persistent_fid, u64 volatile_fid, int level)
34f62640
SF		 3266{
3267 struct smb2_query_info_rsp *rsp = NULL;
3268 struct kvec iov;
da502f7d 3269 struct kvec rsp_iov;
34f62640 3270 int rc = 0;
2167114c 3271 int resp_buftype, max_len, min_len;
34f62640
SF		 3272 struct cifs_ses *ses = tcon->ses;
3273 unsigned int rsp_len, offset;
7fb8986e 3274 int flags = 0;
34f62640 3275
2167114c
SF		 3276 if (level == FS_DEVICE_INFORMATION) {
3277 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3278 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3279 } else if (level == FS_ATTRIBUTE_INFORMATION) {
3280 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
3281 min_len = MIN_FS_ATTR_INFO_SIZE;
af6a12ea
SF		 3282 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
3283 max_len = sizeof(struct smb3_fs_ss_info);
3284 min_len = sizeof(struct smb3_fs_ss_info);
2167114c 3285 } else {
af6a12ea 3286 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2167114c
SF		 3287 return -EINVAL;
3288 }
3289
3290 rc = build_qfs_info_req(&iov, tcon, level, max_len,
34f62640
SF		 3291 persistent_fid, volatile_fid);
3292 if (rc)
3293 return rc;
3294
7fb8986e
PS		 3295 if (encryption_required(tcon))
3296 flags |= CIFS_TRANSFORM_REQ;
3297
3298 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d 3299 cifs_small_buf_release(iov.iov_base);
34f62640
SF		 3300 if (rc) {
3301 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
3302 goto qfsattr_exit;
3303 }
da502f7d 3304 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
34f62640
SF		 3305
3306 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
3307 offset = le16_to_cpu(rsp->OutputBufferOffset);
2167114c
SF		 3308 rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
3309 if (rc)
3310 goto qfsattr_exit;
3311
3312 if (level == FS_ATTRIBUTE_INFORMATION)
34f62640
SF		 3313 memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
3314 + (char *)&rsp->hdr, min_t(unsigned int,
2167114c
SF		 3315 rsp_len, max_len));
3316 else if (level == FS_DEVICE_INFORMATION)
3317 memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
3318 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
af6a12ea
SF		 3319 else if (level == FS_SECTOR_SIZE_INFORMATION) {
3320 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
3321 (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
3322 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
3323 tcon->perf_sector_size =
3324 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
3325 }
34f62640
SF		 3326
3327qfsattr_exit:
da502f7d 3328 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
6fc05c25
PS		 3329 return rc;
3330}
f7ba7fe6
PS		 3331
3332int
3333smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
3334 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3335 const __u32 num_lock, struct smb2_lock_element *buf)
3336{
3337 int rc = 0;
3338 struct smb2_lock_req *req = NULL;
3339 struct kvec iov[2];
da502f7d 3340 struct kvec rsp_iov;
f7ba7fe6
PS		 3341 int resp_buf_type;
3342 unsigned int count;
7fb8986e 3343 int flags = CIFS_NO_RESP;
f7ba7fe6 3344
f96637be 3345 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
f7ba7fe6
PS		 3346
3347 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
3348 if (rc)
3349 return rc;
3350
7fb8986e
PS		 3351 if (encryption_required(tcon))
3352 flags |= CIFS_TRANSFORM_REQ;
3353
31473fc4 3354 req->hdr.sync_hdr.ProcessId = cpu_to_le32(pid);
f7ba7fe6
PS		 3355 req->LockCount = cpu_to_le16(num_lock);
3356
3357 req->PersistentFileId = persist_fid;
3358 req->VolatileFileId = volatile_fid;
3359
3360 count = num_lock * sizeof(struct smb2_lock_element);
3361 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
3362
3363 iov[0].iov_base = (char *)req;
3364 /* 4 for rfc1002 length field and count for all locks */
3365 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
3366 iov[1].iov_base = (char *)buf;
3367 iov[1].iov_len = count;
3368
3369 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
7fb8986e 3370 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, flags,
da502f7d
PS		 3371 &rsp_iov);
3372 cifs_small_buf_release(req);
f7ba7fe6 3373 if (rc) {
f96637be 3374 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
f7ba7fe6
PS		 3375 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
3376 }
3377
3378 return rc;
3379}
3380
3381int
3382SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
3383 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3384 const __u64 length, const __u64 offset, const __u32 lock_flags,
3385 const bool wait)
3386{
3387 struct smb2_lock_element lock;
3388
3389 lock.Offset = cpu_to_le64(offset);
3390 lock.Length = cpu_to_le64(length);
3391 lock.Flags = cpu_to_le32(lock_flags);
3392 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
3393 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
3394
3395 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
3396}
0822f514
PS		 3397
3398int
3399SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
3400 __u8 *lease_key, const __le32 lease_state)
3401{
3402 int rc;
3403 struct smb2_lease_ack *req = NULL;
7fb8986e 3404 int flags = CIFS_OBREAK_OP;
0822f514 3405
f96637be 3406 cifs_dbg(FYI, "SMB2_lease_break\n");
0822f514 3407 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
0822f514
PS		 3408 if (rc)
3409 return rc;
3410
7fb8986e
PS		 3411 if (encryption_required(tcon))
3412 flags |= CIFS_TRANSFORM_REQ;
3413
31473fc4 3414 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
0822f514
PS		 3415 req->StructureSize = cpu_to_le16(36);
3416 inc_rfc1001_len(req, 12);
3417
3418 memcpy(req->LeaseKey, lease_key, 16);
3419 req->LeaseState = lease_state;
3420
7fb8986e 3421 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, flags);
da502f7d 3422 cifs_small_buf_release(req);
0822f514
PS		 3423
3424 if (rc) {
3425 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 3426 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
0822f514
PS		 3427 }
3428
3429 return rc;
3430}
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