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CIFS: use tcon_ipc instead of use_ipc parameter of SMB2_ioctl
[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>
c6e970a0 36#include <linux/uuid.h>
33319141 37#include <linux/pagemap.h>
ec2e4523
PS		 38#include <linux/xattr.h>
39#include "smb2pdu.h"
40#include "cifsglob.h"
41#include "cifsacl.h"
42#include "cifsproto.h"
43#include "smb2proto.h"
44#include "cifs_unicode.h"
45#include "cifs_debug.h"
46#include "ntlmssp.h"
47#include "smb2status.h"
09a4707e 48#include "smb2glob.h"
d324f08d 49#include "cifspdu.h"
ceb1b0b9 50#include "cifs_spnego.h"
ec2e4523
PS		 51
52/*
53 * The following table defines the expected "StructureSize" of SMB2 requests
54 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
55 *
56 * Note that commands are defined in smb2pdu.h in le16 but the array below is
57 * indexed by command in host byte order.
58 */
59static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
60 /* SMB2_NEGOTIATE */ 36,
61 /* SMB2_SESSION_SETUP */ 25,
62 /* SMB2_LOGOFF */ 4,
63 /* SMB2_TREE_CONNECT */ 9,
64 /* SMB2_TREE_DISCONNECT */ 4,
65 /* SMB2_CREATE */ 57,
66 /* SMB2_CLOSE */ 24,
67 /* SMB2_FLUSH */ 24,
68 /* SMB2_READ */ 49,
69 /* SMB2_WRITE */ 49,
70 /* SMB2_LOCK */ 48,
71 /* SMB2_IOCTL */ 57,
72 /* SMB2_CANCEL */ 4,
73 /* SMB2_ECHO */ 4,
74 /* SMB2_QUERY_DIRECTORY */ 33,
75 /* SMB2_CHANGE_NOTIFY */ 32,
76 /* SMB2_QUERY_INFO */ 41,
77 /* SMB2_SET_INFO */ 33,
78 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
79};
80
7fb8986e
PS		 81static int encryption_required(const struct cifs_tcon *tcon)
82{
ae6f8dd4
PS		 83 if (!tcon)
84 return 0;
7fb8986e
PS		 85 if ((tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
86 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
87 return 1;
ae6f8dd4
PS		 88 if (tcon->seal &&
89 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
90 return 1;
7fb8986e
PS		 91 return 0;
92}
ec2e4523
PS		 93
94static void
cb200bd6 95smb2_hdr_assemble(struct smb2_sync_hdr *shdr, __le16 smb2_cmd,
ec2e4523
PS		 96 const struct cifs_tcon *tcon)
97{
31473fc4
PS		 98 shdr->ProtocolId = SMB2_PROTO_NUMBER;
99 shdr->StructureSize = cpu_to_le16(64);
100 shdr->Command = smb2_cmd;
7d414f39
RL		 101 if (tcon && tcon->ses && tcon->ses->server) {
102 struct TCP_Server_Info *server = tcon->ses->server;
103
104 spin_lock(&server->req_lock);
105 /* Request up to 2 credits but don't go over the limit. */
141891f4 106 if (server->credits >= server->max_credits)
31473fc4 107 shdr->CreditRequest = cpu_to_le16(0);
7d414f39 108 else
31473fc4 109 shdr->CreditRequest = cpu_to_le16(
141891f4 110 min_t(int, server->max_credits -
7d414f39
RL		 111 server->credits, 2));
112 spin_unlock(&server->req_lock);
113 } else {
31473fc4 114 shdr->CreditRequest = cpu_to_le16(2);
7d414f39 115 }
31473fc4 116 shdr->ProcessId = cpu_to_le32((__u16)current->tgid);
ec2e4523
PS		 117
118 if (!tcon)
119 goto out;
120
2b80d049
SF		 121 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
122 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
1dc92c45 123 if ((tcon->ses) && (tcon->ses->server) &&
84ceeb96 124 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
31473fc4 125 shdr->CreditCharge = cpu_to_le16(1);
2b80d049
SF		 126 /* else CreditCharge MBZ */
127
31473fc4 128 shdr->TreeId = tcon->tid;
ec2e4523
PS		 129 /* Uid is not converted */
130 if (tcon->ses)
31473fc4 131 shdr->SessionId = tcon->ses->Suid;
f87ab88b
SF		 132
133 /*
134 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
135 * to pass the path on the Open SMB prefixed by \\server\share.
136 * Not sure when we would need to do the augmented path (if ever) and
137 * setting this flag breaks the SMB2 open operation since it is
138 * illegal to send an empty path name (without \\server\share prefix)
139 * when the DFS flag is set in the SMB open header. We could
140 * consider setting the flag on all operations other than open
141 * but it is safer to net set it for now.
142 */
143/* if (tcon->share_flags & SHI1005_FLAGS_DFS)
31473fc4 144 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
f87ab88b 145
7fb8986e
PS		 146 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign &&
147 !encryption_required(tcon))
31473fc4 148 shdr->Flags |= SMB2_FLAGS_SIGNED;
ec2e4523 149out:
ec2e4523
PS		 150 return;
151}
152
153static int
154smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
155{
156 int rc = 0;
aa24d1e9
PS		 157 struct nls_table *nls_codepage;
158 struct cifs_ses *ses;
159 struct TCP_Server_Info *server;
160
161 /*
162 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
163 * check for tcp and smb session status done differently
164 * for those three - in the calling routine.
165 */
166 if (tcon == NULL)
167 return rc;
168
169 if (smb2_command == SMB2_TREE_CONNECT)
170 return rc;
171
172 if (tcon->tidStatus == CifsExiting) {
173 /*
174 * only tree disconnect, open, and write,
175 * (and ulogoff which does not have tcon)
176 * are allowed as we start force umount.
177 */
178 if ((smb2_command != SMB2_WRITE) &&
179 (smb2_command != SMB2_CREATE) &&
180 (smb2_command != SMB2_TREE_DISCONNECT)) {
f96637be
JP		 181 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
182 smb2_command);
aa24d1e9
PS		 183 return -ENODEV;
184 }
185 }
186 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
187 (!tcon->ses->server))
188 return -EIO;
189
190 ses = tcon->ses;
191 server = ses->server;
192
193 /*
194 * Give demultiplex thread up to 10 seconds to reconnect, should be
195 * greater than cifs socket timeout which is 7 seconds
196 */
197 while (server->tcpStatus == CifsNeedReconnect) {
198 /*
199 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
200 * here since they are implicitly done when session drops.
201 */
202 switch (smb2_command) {
203 /*
204 * BB Should we keep oplock break and add flush to exceptions?
205 */
206 case SMB2_TREE_DISCONNECT:
207 case SMB2_CANCEL:
208 case SMB2_CLOSE:
209 case SMB2_OPLOCK_BREAK:
210 return -EAGAIN;
211 }
212
213 wait_event_interruptible_timeout(server->response_q,
214 (server->tcpStatus != CifsNeedReconnect), 10 * HZ);
215
216 /* are we still trying to reconnect? */
217 if (server->tcpStatus != CifsNeedReconnect)
218 break;
219
220 /*
221 * on "soft" mounts we wait once. Hard mounts keep
222 * retrying until process is killed or server comes
223 * back on-line
224 */
225 if (!tcon->retry) {
f96637be 226 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
aa24d1e9
PS		 227 return -EHOSTDOWN;
228 }
229 }
230
231 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
232 return rc;
233
234 nls_codepage = load_nls_default();
235
236 /*
237 * need to prevent multiple threads trying to simultaneously reconnect
238 * the same SMB session
239 */
240 mutex_lock(&tcon->ses->session_mutex);
241 rc = cifs_negotiate_protocol(0, tcon->ses);
242 if (!rc && tcon->ses->need_reconnect)
243 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
244
245 if (rc || !tcon->need_reconnect) {
246 mutex_unlock(&tcon->ses->session_mutex);
247 goto out;
248 }
249
250 cifs_mark_open_files_invalid(tcon);
96a988ff
PS		 251 if (tcon->use_persistent)
252 tcon->need_reopen_files = true;
52ace1ef 253
aa24d1e9
PS		 254 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
255 mutex_unlock(&tcon->ses->session_mutex);
52ace1ef 256
f96637be 257 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
aa24d1e9
PS		 258 if (rc)
259 goto out;
96a988ff
PS		 260
261 if (smb2_command != SMB2_INTERNAL_CMD)
262 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
263
aa24d1e9 264 atomic_inc(&tconInfoReconnectCount);
aa24d1e9
PS		 265out:
266 /*
267 * Check if handle based operation so we know whether we can continue
268 * or not without returning to caller to reset file handle.
269 */
270 /*
271 * BB Is flush done by server on drop of tcp session? Should we special
272 * case it and skip above?
273 */
274 switch (smb2_command) {
275 case SMB2_FLUSH:
276 case SMB2_READ:
277 case SMB2_WRITE:
278 case SMB2_LOCK:
279 case SMB2_IOCTL:
280 case SMB2_QUERY_DIRECTORY:
281 case SMB2_CHANGE_NOTIFY:
282 case SMB2_QUERY_INFO:
283 case SMB2_SET_INFO:
4772c795 284 rc = -EAGAIN;
aa24d1e9
PS		 285 }
286 unload_nls(nls_codepage);
ec2e4523
PS		 287 return rc;
288}
289
cb200bd6
PS		 290static void
291fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, void *buf,
292 unsigned int *total_len)
293{
294 struct smb2_sync_pdu *spdu = (struct smb2_sync_pdu *)buf;
295 /* lookup word count ie StructureSize from table */
296 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)];
297
298 /*
299 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
300 * largest operations (Create)
301 */
302 memset(buf, 0, 256);
303
304 smb2_hdr_assemble(&spdu->sync_hdr, smb2_command, tcon);
305 spdu->StructureSize2 = cpu_to_le16(parmsize);
306
307 *total_len = parmsize + sizeof(struct smb2_sync_hdr);
308}
309
b8f57ee8
PS		 310/* init request without RFC1001 length at the beginning */
311static int
312smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
313 void **request_buf, unsigned int *total_len)
314{
315 int rc;
316 struct smb2_sync_hdr *shdr;
317
318 rc = smb2_reconnect(smb2_command, tcon);
319 if (rc)
320 return rc;
321
322 /* BB eventually switch this to SMB2 specific small buf size */
323 *request_buf = cifs_small_buf_get();
324 if (*request_buf == NULL) {
325 /* BB should we add a retry in here if not a writepage? */
326 return -ENOMEM;
327 }
328
329 shdr = (struct smb2_sync_hdr *)(*request_buf);
330
331 fill_small_buf(smb2_command, tcon, shdr, total_len);
332
333 if (tcon != NULL) {
334#ifdef CONFIG_CIFS_STATS2
335 uint16_t com_code = le16_to_cpu(smb2_command);
336
337 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
338#endif
339 cifs_stats_inc(&tcon->num_smbs_sent);
340 }
341
342 return rc;
343}
344
ec2e4523
PS		 345/*
346 * Allocate and return pointer to an SMB request hdr, and set basic
347 * SMB information in the SMB header. If the return code is zero, this
b8f57ee8
PS		 348 * function must have filled in request_buf pointer. The returned buffer
349 * has RFC1001 length at the beginning.
ec2e4523
PS		 350 */
351static int
352small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
353 void **request_buf)
354{
cb200bd6
PS		 355 int rc;
356 unsigned int total_len;
357 struct smb2_pdu *pdu;
ec2e4523
PS		 358
359 rc = smb2_reconnect(smb2_command, tcon);
360 if (rc)
361 return rc;
362
363 /* BB eventually switch this to SMB2 specific small buf size */
364 *request_buf = cifs_small_buf_get();
365 if (*request_buf == NULL) {
366 /* BB should we add a retry in here if not a writepage? */
367 return -ENOMEM;
368 }
369
cb200bd6
PS		 370 pdu = (struct smb2_pdu *)(*request_buf);
371
372 fill_small_buf(smb2_command, tcon, get_sync_hdr(pdu), &total_len);
373
374 /* Note this is only network field converted to big endian */
375 pdu->hdr.smb2_buf_length = cpu_to_be32(total_len);
ec2e4523
PS		 376
377 if (tcon != NULL) {
378#ifdef CONFIG_CIFS_STATS2
ec2e4523
PS		 379 uint16_t com_code = le16_to_cpu(smb2_command);
380 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
ec2e4523
PS		 381#endif
382 cifs_stats_inc(&tcon->num_smbs_sent);
383 }
384
385 return rc;
386}
387
ebb3a9d4
SF		 388#ifdef CONFIG_CIFS_SMB311
389/* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
390#define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
391
392
393#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
394#define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
395
396static void
397build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
398{
399 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
400 pneg_ctxt->DataLength = cpu_to_le16(38);
401 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
402 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
403 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
404 pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
405}
406
407static void
408build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
409{
410 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
411 pneg_ctxt->DataLength = cpu_to_le16(6);
412 pneg_ctxt->CipherCount = cpu_to_le16(2);
413 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
414 pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM;
415}
416
417static void
418assemble_neg_contexts(struct smb2_negotiate_req *req)
419{
420
421 /* +4 is to account for the RFC1001 len field */
422 char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT + 4;
423
424 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
425 /* Add 2 to size to round to 8 byte boundary */
426 pneg_ctxt += 2 + sizeof(struct smb2_preauth_neg_context);
427 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
428 req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
429 req->NegotiateContextCount = cpu_to_le16(2);
ed600f09 430 inc_rfc1001_len(req, 4 + sizeof(struct smb2_preauth_neg_context)
ebb3a9d4
SF		 431 + sizeof(struct smb2_encryption_neg_context)); /* calculate hash */
432}
433#else
434static void assemble_neg_contexts(struct smb2_negotiate_req *req)
435{
436 return;
437}
438#endif /* SMB311 */
439
ec2e4523
PS		 440/*
441 *
442 * SMB2 Worker functions follow:
443 *
444 * The general structure of the worker functions is:
445 * 1) Call smb2_init (assembles SMB2 header)
446 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
447 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
448 * 4) Decode SMB2 command specific fields in the fixed length area
449 * 5) Decode variable length data area (if any for this SMB2 command type)
450 * 6) Call free smb buffer
451 * 7) return
452 *
453 */
454
455int
456SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
457{
458 struct smb2_negotiate_req *req;
459 struct smb2_negotiate_rsp *rsp;
460 struct kvec iov[1];
da502f7d 461 struct kvec rsp_iov;
ec2e4523
PS		 462 int rc = 0;
463 int resp_buftype;
3534b850 464 struct TCP_Server_Info *server = ses->server;
ec2e4523
PS		 465 int blob_offset, blob_length;
466 char *security_blob;
467 int flags = CIFS_NEG_OP;
468
f96637be 469 cifs_dbg(FYI, "Negotiate protocol\n");
ec2e4523 470
3534b850
JL		 471 if (!server) {
472 WARN(1, "%s: server is NULL!\n", __func__);
473 return -EIO;
ec2e4523
PS		 474 }
475
476 rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
477 if (rc)
478 return rc;
479
31473fc4 480 req->hdr.sync_hdr.SessionId = 0;
ec2e4523 481
ab6a2b01
SF		 482 if (strcmp(ses->server->vals->version_string,
483 SMB3ANY_VERSION_STRING) == 0) {
484 req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
485 req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
486 req->DialectCount = cpu_to_le16(2);
487 inc_rfc1001_len(req, 4);
488 } else if (strcmp(ses->server->vals->version_string,
489 SMBDEFAULT_VERSION_STRING) == 0) {
490 req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
491 req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
492 req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
493 req->DialectCount = cpu_to_le16(3);
494 inc_rfc1001_len(req, 6);
495 } else {
496 /* otherwise send specific dialect */
497 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
498 req->DialectCount = cpu_to_le16(1);
499 inc_rfc1001_len(req, 2);
500 }
ec2e4523
PS		 501
502 /* only one of SMB2 signing flags may be set in SMB2 request */
38d77c50 503 if (ses->sign)
9cd2e62c 504 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
38d77c50 505 else if (global_secflags & CIFSSEC_MAY_SIGN)
9cd2e62c 506 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
38d77c50
JL		 507 else
508 req->SecurityMode = 0;
ec2e4523 509
e4aa25e7 510 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
ec2e4523 511
3c5f9be1
SF		 512 /* ClientGUID must be zero for SMB2.02 dialect */
513 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
514 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
ebb3a9d4 515 else {
3c5f9be1
SF		 516 memcpy(req->ClientGUID, server->client_guid,
517 SMB2_CLIENT_GUID_SIZE);
ebb3a9d4
SF		 518 if (ses->server->vals->protocol_id == SMB311_PROT_ID)
519 assemble_neg_contexts(req);
520 }
ec2e4523
PS		 521 iov[0].iov_base = (char *)req;
522 /* 4 for rfc1002 length field */
523 iov[0].iov_len = get_rfc1002_length(req) + 4;
524
da502f7d
PS		 525 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
526 cifs_small_buf_release(req);
527 rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base;
ec2e4523
PS		 528 /*
529 * No tcon so can't do
530 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
531 */
7e682f76
SF		 532 if (rc == -EOPNOTSUPP) {
533 cifs_dbg(VFS, "Dialect not supported by server. Consider "
ab6a2b01 534 "specifying vers=1.0 or vers=2.0 on mount for accessing"
7e682f76
SF		 535 " older servers\n");
536 goto neg_exit;
537 } else if (rc != 0)
ec2e4523
PS		 538 goto neg_exit;
539
ab6a2b01
SF		 540 if (strcmp(ses->server->vals->version_string,
541 SMB3ANY_VERSION_STRING) == 0) {
542 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
543 cifs_dbg(VFS,
544 "SMB2 dialect returned but not requested\n");
545 return -EIO;
546 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
547 cifs_dbg(VFS,
548 "SMB2.1 dialect returned but not requested\n");
549 return -EIO;
550 }
551 } else if (strcmp(ses->server->vals->version_string,
552 SMBDEFAULT_VERSION_STRING) == 0) {
553 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
554 cifs_dbg(VFS,
555 "SMB2 dialect returned but not requested\n");
556 return -EIO;
557 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
558 /* ops set to 3.0 by default for default so update */
559 ses->server->ops = &smb21_operations;
560 }
d8372e9a
SF		 561 } else if (le16_to_cpu(rsp->DialectRevision) !=
562 ses->server->vals->protocol_id) {
ab6a2b01
SF		 563 /* if requested single dialect ensure returned dialect matched */
564 cifs_dbg(VFS, "Illegal 0x%x dialect returned: not requested\n",
d8372e9a 565 le16_to_cpu(rsp->DialectRevision));
ab6a2b01
SF		 566 return -EIO;
567 }
568
f96637be 569 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
ec2e4523 570
e4aa25e7 571 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
f96637be 572 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
e4aa25e7 573 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
f96637be 574 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
e4aa25e7 575 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
f96637be 576 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
20b6d8b4
SF		 577 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
578 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
5f7fbf73
SF		 579#ifdef CONFIG_CIFS_SMB311
580 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
581 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
582#endif /* SMB311 */
ec2e4523 583 else {
f799d623 584 cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
f96637be 585 le16_to_cpu(rsp->DialectRevision));
ec2e4523
PS		 586 rc = -EIO;
587 goto neg_exit;
588 }
589 server->dialect = le16_to_cpu(rsp->DialectRevision);
590
ab6a2b01
SF		 591 /* BB: add check that dialect was valid given dialect(s) we asked for */
592
e598d1d8
JL		 593 /* SMB2 only has an extended negflavor */
594 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
2365c4ea
PS		 595 /* set it to the maximum buffer size value we can send with 1 credit */
596 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
597 SMB2_MAX_BUFFER_SIZE);
ec2e4523
PS		 598 server->max_read = le32_to_cpu(rsp->MaxReadSize);
599 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
600 /* BB Do we need to validate the SecurityMode? */
601 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
602 server->capabilities = le32_to_cpu(rsp->Capabilities);
29e20f9c
PS		 603 /* Internal types */
604 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
ec2e4523
PS		 605
606 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
607 &rsp->hdr);
5d875cc9
SF		 608 /*
609 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
610 * for us will be
611 * ses->sectype = RawNTLMSSP;
612 * but for time being this is our only auth choice so doesn't matter.
613 * We just found a server which sets blob length to zero expecting raw.
614 */
67dbea2c 615 if (blob_length == 0) {
5d875cc9 616 cifs_dbg(FYI, "missing security blob on negprot\n");
67dbea2c
PS		 617 server->sec_ntlmssp = true;
618 }
3c1bf7e4 619
38d77c50 620 rc = cifs_enable_signing(server, ses->sign);
9ddec561
JL		 621 if (rc)
622 goto neg_exit;
ceb1b0b9 623 if (blob_length) {
ebdd207e 624 rc = decode_negTokenInit(security_blob, blob_length, server);
ceb1b0b9
SF		 625 if (rc == 1)
626 rc = 0;
627 else if (rc == 0)
628 rc = -EIO;
ec2e4523 629 }
ec2e4523
PS		 630neg_exit:
631 free_rsp_buf(resp_buftype, rsp);
632 return rc;
633}
5478f9ba 634
ff1c038a
SF		 635int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
636{
637 int rc = 0;
638 struct validate_negotiate_info_req vneg_inbuf;
639 struct validate_negotiate_info_rsp *pneg_rsp;
640 u32 rsplen;
ab6a2b01 641 u32 inbuflen; /* max of 4 dialects */
ff1c038a
SF		 642
643 cifs_dbg(FYI, "validate negotiate\n");
644
645 /*
646 * validation ioctl must be signed, so no point sending this if we
daaeb28b
SF		 647 * can not sign it (ie are not known user). Even if signing is not
648 * required (enabled but not negotiated), in those cases we selectively
ff1c038a 649 * sign just this, the first and only signed request on a connection.
daaeb28b 650 * Having validation of negotiate info helps reduce attack vectors.
ff1c038a 651 */
daaeb28b 652 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
ff1c038a
SF		 653 return 0; /* validation requires signing */
654
daaeb28b
SF		 655 if (tcon->ses->user_name == NULL) {
656 cifs_dbg(FYI, "Can't validate negotiate: null user mount\n");
657 return 0; /* validation requires signing */
658 }
659
660 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
661 cifs_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n");
662
ff1c038a
SF		 663 vneg_inbuf.Capabilities =
664 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
39552ea8
SP		 665 memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid,
666 SMB2_CLIENT_GUID_SIZE);
ff1c038a
SF		 667
668 if (tcon->ses->sign)
669 vneg_inbuf.SecurityMode =
670 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
671 else if (global_secflags & CIFSSEC_MAY_SIGN)
672 vneg_inbuf.SecurityMode =
673 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
674 else
675 vneg_inbuf.SecurityMode = 0;
676
ab6a2b01
SF		 677
678 if (strcmp(tcon->ses->server->vals->version_string,
679 SMB3ANY_VERSION_STRING) == 0) {
680 vneg_inbuf.Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
681 vneg_inbuf.Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
682 vneg_inbuf.DialectCount = cpu_to_le16(2);
683 /* structure is big enough for 3 dialects, sending only 2 */
684 inbuflen = sizeof(struct validate_negotiate_info_req) - 2;
685 } else if (strcmp(tcon->ses->server->vals->version_string,
686 SMBDEFAULT_VERSION_STRING) == 0) {
687 vneg_inbuf.Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
688 vneg_inbuf.Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
689 vneg_inbuf.Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
690 vneg_inbuf.DialectCount = cpu_to_le16(3);
691 /* structure is big enough for 3 dialects */
692 inbuflen = sizeof(struct validate_negotiate_info_req);
693 } else {
694 /* otherwise specific dialect was requested */
695 vneg_inbuf.Dialects[0] =
696 cpu_to_le16(tcon->ses->server->vals->protocol_id);
697 vneg_inbuf.DialectCount = cpu_to_le16(1);
698 /* structure is big enough for 3 dialects, sending only 1 */
699 inbuflen = sizeof(struct validate_negotiate_info_req) - 4;
700 }
ff1c038a
SF		 701
702 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
703 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
704 (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
705 (char **)&pneg_rsp, &rsplen);
706
707 if (rc != 0) {
708 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
709 return -EIO;
710 }
711
712 if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
7db0a6ef
SF		 713 cifs_dbg(VFS, "invalid protocol negotiate response size: %d\n",
714 rsplen);
715
716 /* relax check since Mac returns max bufsize allowed on ioctl */
717 if (rsplen > CIFSMaxBufSize)
718 return -EIO;
ff1c038a
SF		 719 }
720
721 /* check validate negotiate info response matches what we got earlier */
722 if (pneg_rsp->Dialect !=
723 cpu_to_le16(tcon->ses->server->vals->protocol_id))
724 goto vneg_out;
725
726 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
727 goto vneg_out;
728
729 /* do not validate server guid because not saved at negprot time yet */
730
731 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
732 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
733 goto vneg_out;
734
735 /* validate negotiate successful */
736 cifs_dbg(FYI, "validate negotiate info successful\n");
737 return 0;
738
739vneg_out:
740 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
741 return -EIO;
742}
743
ef65aaed
SP		 744enum securityEnum
745smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
746{
747 switch (requested) {
748 case Kerberos:
749 case RawNTLMSSP:
750 return requested;
751 case NTLMv2:
752 return RawNTLMSSP;
753 case Unspecified:
754 if (server->sec_ntlmssp &&
755 (global_secflags & CIFSSEC_MAY_NTLMSSP))
756 return RawNTLMSSP;
757 if ((server->sec_kerberos || server->sec_mskerberos) &&
758 (global_secflags & CIFSSEC_MAY_KRB5))
759 return Kerberos;
760 /* Fallthrough */
761 default:
762 return Unspecified;
763 }
764}
765
3baf1a7b
SP		 766struct SMB2_sess_data {
767 unsigned int xid;
768 struct cifs_ses *ses;
769 struct nls_table *nls_cp;
770 void (*func)(struct SMB2_sess_data *);
771 int result;
772 u64 previous_session;
773
774 /* we will send the SMB in three pieces:
775 * a fixed length beginning part, an optional
776 * SPNEGO blob (which can be zero length), and a
777 * last part which will include the strings
778 * and rest of bcc area. This allows us to avoid
779 * a large buffer 17K allocation
780 */
781 int buf0_type;
782 struct kvec iov[2];
783};
784
785static int
786SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
787{
788 int rc;
789 struct cifs_ses *ses = sess_data->ses;
790 struct smb2_sess_setup_req *req;
791 struct TCP_Server_Info *server = ses->server;
792
793 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
794 if (rc)
795 return rc;
796
31473fc4
PS		 797 /* First session, not a reauthenticate */
798 req->hdr.sync_hdr.SessionId = 0;
3baf1a7b
SP		 799
800 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
801 req->PreviousSessionId = sess_data->previous_session;
802
803 req->Flags = 0; /* MBZ */
804 /* to enable echos and oplocks */
31473fc4 805 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(3);
3baf1a7b
SP		 806
807 /* only one of SMB2 signing flags may be set in SMB2 request */
808 if (server->sign)
809 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
810 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
811 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
812 else
813 req->SecurityMode = 0;
814
815 req->Capabilities = 0;
816 req->Channel = 0; /* MBZ */
817
818 sess_data->iov[0].iov_base = (char *)req;
819 /* 4 for rfc1002 length field and 1 for pad */
820 sess_data->iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
821 /*
822 * This variable will be used to clear the buffer
823 * allocated above in case of any error in the calling function.
824 */
825 sess_data->buf0_type = CIFS_SMALL_BUFFER;
826
827 return 0;
828}
829
830static void
831SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
832{
833 free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
834 sess_data->buf0_type = CIFS_NO_BUFFER;
835}
836
837static int
838SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
839{
840 int rc;
841 struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
da502f7d 842 struct kvec rsp_iov = { NULL, 0 };
3baf1a7b
SP		 843
844 /* Testing shows that buffer offset must be at location of Buffer[0] */
845 req->SecurityBufferOffset =
846 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
847 1 /* pad */ - 4 /* rfc1001 len */);
848 req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
849
850 inc_rfc1001_len(req, sess_data->iov[1].iov_len - 1 /* pad */);
851
852 /* BB add code to build os and lm fields */
853
854 rc = SendReceive2(sess_data->xid, sess_data->ses,
855 sess_data->iov, 2,
856 &sess_data->buf0_type,
da502f7d
PS		 857 CIFS_LOG_ERROR | CIFS_NEG_OP, &rsp_iov);
858 cifs_small_buf_release(sess_data->iov[0].iov_base);
859 memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
3baf1a7b
SP		 860
861 return rc;
862}
863
864static int
865SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
866{
867 int rc = 0;
868 struct cifs_ses *ses = sess_data->ses;
869
870 mutex_lock(&ses->server->srv_mutex);
cabfb368 871 if (ses->server->ops->generate_signingkey) {
3baf1a7b 872 rc = ses->server->ops->generate_signingkey(ses);
3baf1a7b
SP		 873 if (rc) {
874 cifs_dbg(FYI,
875 "SMB3 session key generation failed\n");
876 mutex_unlock(&ses->server->srv_mutex);
cabfb368 877 return rc;
3baf1a7b
SP		 878 }
879 }
880 if (!ses->server->session_estab) {
881 ses->server->sequence_number = 0x2;
882 ses->server->session_estab = true;
883 }
884 mutex_unlock(&ses->server->srv_mutex);
885
886 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
887 spin_lock(&GlobalMid_Lock);
888 ses->status = CifsGood;
889 ses->need_reconnect = false;
890 spin_unlock(&GlobalMid_Lock);
3baf1a7b
SP		 891 return rc;
892}
893
894#ifdef CONFIG_CIFS_UPCALL
895static void
896SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
897{
898 int rc;
899 struct cifs_ses *ses = sess_data->ses;
900 struct cifs_spnego_msg *msg;
901 struct key *spnego_key = NULL;
902 struct smb2_sess_setup_rsp *rsp = NULL;
903
904 rc = SMB2_sess_alloc_buffer(sess_data);
905 if (rc)
906 goto out;
907
908 spnego_key = cifs_get_spnego_key(ses);
909 if (IS_ERR(spnego_key)) {
910 rc = PTR_ERR(spnego_key);
911 spnego_key = NULL;
912 goto out;
913 }
914
915 msg = spnego_key->payload.data[0];
916 /*
917 * check version field to make sure that cifs.upcall is
918 * sending us a response in an expected form
919 */
920 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
921 cifs_dbg(VFS,
922 "bad cifs.upcall version. Expected %d got %d",
923 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
924 rc = -EKEYREJECTED;
925 goto out_put_spnego_key;
926 }
927
928 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
929 GFP_KERNEL);
930 if (!ses->auth_key.response) {
931 cifs_dbg(VFS,
932 "Kerberos can't allocate (%u bytes) memory",
933 msg->sesskey_len);
934 rc = -ENOMEM;
935 goto out_put_spnego_key;
936 }
937 ses->auth_key.len = msg->sesskey_len;
938
939 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
940 sess_data->iov[1].iov_len = msg->secblob_len;
941
942 rc = SMB2_sess_sendreceive(sess_data);
943 if (rc)
944 goto out_put_spnego_key;
945
946 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
31473fc4 947 ses->Suid = rsp->hdr.sync_hdr.SessionId;
3baf1a7b
SP		 948
949 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
3baf1a7b
SP		 950
951 rc = SMB2_sess_establish_session(sess_data);
952out_put_spnego_key:
953 key_invalidate(spnego_key);
954 key_put(spnego_key);
955out:
956 sess_data->result = rc;
957 sess_data->func = NULL;
958 SMB2_sess_free_buffer(sess_data);
959}
960#else
961static void
962SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
963{
964 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
965 sess_data->result = -EOPNOTSUPP;
966 sess_data->func = NULL;
967}
968#endif
969
166cea4d
SP		 970static void
971SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
972
973static void
974SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
5478f9ba 975{
166cea4d
SP		 976 int rc;
977 struct cifs_ses *ses = sess_data->ses;
5478f9ba 978 struct smb2_sess_setup_rsp *rsp = NULL;
166cea4d 979 char *ntlmssp_blob = NULL;
5478f9ba 980 bool use_spnego = false; /* else use raw ntlmssp */
166cea4d 981 u16 blob_length = 0;
d4e63bd6 982
5478f9ba
PS		 983 /*
984 * If memory allocation is successful, caller of this function
985 * frees it.
986 */
987 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
166cea4d
SP		 988 if (!ses->ntlmssp) {
989 rc = -ENOMEM;
990 goto out_err;
991 }
5c234aa5 992 ses->ntlmssp->sesskey_per_smbsess = true;
5478f9ba 993
166cea4d 994 rc = SMB2_sess_alloc_buffer(sess_data);
5478f9ba 995 if (rc)
166cea4d 996 goto out_err;
5478f9ba 997
166cea4d
SP		 998 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
999 GFP_KERNEL);
1000 if (ntlmssp_blob == NULL) {
1001 rc = -ENOMEM;
1002 goto out;
1003 }
c2afb814 1004
166cea4d
SP		 1005 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
1006 if (use_spnego) {
1007 /* BB eventually need to add this */
1008 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1009 rc = -EOPNOTSUPP;
1010 goto out;
1011 } else {
1012 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
1013 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
1014 }
1015 sess_data->iov[1].iov_base = ntlmssp_blob;
1016 sess_data->iov[1].iov_len = blob_length;
c2afb814 1017
166cea4d
SP		 1018 rc = SMB2_sess_sendreceive(sess_data);
1019 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
5478f9ba 1020
166cea4d
SP		 1021 /* If true, rc here is expected and not an error */
1022 if (sess_data->buf0_type != CIFS_NO_BUFFER &&
31473fc4 1023 rsp->hdr.sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
166cea4d 1024 rc = 0;
38d77c50 1025
166cea4d
SP		 1026 if (rc)
1027 goto out;
5478f9ba 1028
166cea4d
SP		 1029 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
1030 le16_to_cpu(rsp->SecurityBufferOffset)) {
1031 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
1032 le16_to_cpu(rsp->SecurityBufferOffset));
5478f9ba 1033 rc = -EIO;
166cea4d 1034 goto out;
5478f9ba 1035 }
166cea4d
SP		 1036 rc = decode_ntlmssp_challenge(rsp->Buffer,
1037 le16_to_cpu(rsp->SecurityBufferLength), ses);
1038 if (rc)
1039 goto out;
5478f9ba 1040
166cea4d 1041 cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
5478f9ba 1042
5478f9ba 1043
31473fc4 1044 ses->Suid = rsp->hdr.sync_hdr.SessionId;
166cea4d 1045 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
166cea4d
SP		 1046
1047out:
1048 kfree(ntlmssp_blob);
1049 SMB2_sess_free_buffer(sess_data);
1050 if (!rc) {
1051 sess_data->result = 0;
1052 sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
1053 return;
1054 }
1055out_err:
1056 kfree(ses->ntlmssp);
1057 ses->ntlmssp = NULL;
1058 sess_data->result = rc;
1059 sess_data->func = NULL;
1060}
5478f9ba 1061
166cea4d
SP		 1062static void
1063SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
1064{
1065 int rc;
1066 struct cifs_ses *ses = sess_data->ses;
1067 struct smb2_sess_setup_req *req;
1068 struct smb2_sess_setup_rsp *rsp = NULL;
1069 unsigned char *ntlmssp_blob = NULL;
1070 bool use_spnego = false; /* else use raw ntlmssp */
1071 u16 blob_length = 0;
5478f9ba 1072
166cea4d
SP		 1073 rc = SMB2_sess_alloc_buffer(sess_data);
1074 if (rc)
1075 goto out;
5478f9ba 1076
166cea4d 1077 req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
31473fc4 1078 req->hdr.sync_hdr.SessionId = ses->Suid;
166cea4d
SP		 1079
1080 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
1081 sess_data->nls_cp);
1082 if (rc) {
1083 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
1084 goto out;
5478f9ba
PS		 1085 }
1086
166cea4d
SP		 1087 if (use_spnego) {
1088 /* BB eventually need to add this */
1089 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1090 rc = -EOPNOTSUPP;
1091 goto out;
1092 }
1093 sess_data->iov[1].iov_base = ntlmssp_blob;
1094 sess_data->iov[1].iov_len = blob_length;
5478f9ba 1095
166cea4d
SP		 1096 rc = SMB2_sess_sendreceive(sess_data);
1097 if (rc)
1098 goto out;
1099
1100 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1101
31473fc4 1102 ses->Suid = rsp->hdr.sync_hdr.SessionId;
5478f9ba 1103 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
5478f9ba 1104
166cea4d
SP		 1105 rc = SMB2_sess_establish_session(sess_data);
1106out:
1107 kfree(ntlmssp_blob);
1108 SMB2_sess_free_buffer(sess_data);
1109 kfree(ses->ntlmssp);
1110 ses->ntlmssp = NULL;
1111 sess_data->result = rc;
1112 sess_data->func = NULL;
1113}
d4e63bd6 1114
166cea4d
SP		 1115static int
1116SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data)
1117{
ef65aaed
SP		 1118 int type;
1119
1120 type = smb2_select_sectype(ses->server, ses->sectype);
1121 cifs_dbg(FYI, "sess setup type %d\n", type);
1122 if (type == Unspecified) {
1123 cifs_dbg(VFS,
1124 "Unable to select appropriate authentication method!");
1125 return -EINVAL;
1126 }
d4e63bd6 1127
ef65aaed 1128 switch (type) {
166cea4d
SP		 1129 case Kerberos:
1130 sess_data->func = SMB2_auth_kerberos;
1131 break;
1132 case RawNTLMSSP:
1133 sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
1134 break;
1135 default:
ef65aaed 1136 cifs_dbg(VFS, "secType %d not supported!\n", type);
166cea4d 1137 return -EOPNOTSUPP;
d4e63bd6
SP		 1138 }
1139
166cea4d
SP		 1140 return 0;
1141}
1142
1143int
1144SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
1145 const struct nls_table *nls_cp)
1146{
1147 int rc = 0;
1148 struct TCP_Server_Info *server = ses->server;
1149 struct SMB2_sess_data *sess_data;
1150
1151 cifs_dbg(FYI, "Session Setup\n");
1152
1153 if (!server) {
1154 WARN(1, "%s: server is NULL!\n", __func__);
1155 return -EIO;
d4e63bd6 1156 }
d4e63bd6 1157
166cea4d
SP		 1158 sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
1159 if (!sess_data)
1160 return -ENOMEM;
1161
1162 rc = SMB2_select_sec(ses, sess_data);
1163 if (rc)
1164 goto out;
1165 sess_data->xid = xid;
1166 sess_data->ses = ses;
1167 sess_data->buf0_type = CIFS_NO_BUFFER;
1168 sess_data->nls_cp = (struct nls_table *) nls_cp;
1169
1170 while (sess_data->func)
1171 sess_data->func(sess_data);
1172
f178608c
SF		 1173 if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign))
1174 cifs_dbg(VFS, "signing requested but authenticated as guest\n");
3baf1a7b 1175 rc = sess_data->result;
166cea4d 1176out:
3baf1a7b 1177 kfree(sess_data);
5478f9ba
PS		 1178 return rc;
1179}
1180
1181int
1182SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
1183{
1184 struct smb2_logoff_req *req; /* response is also trivial struct */
1185 int rc = 0;
1186 struct TCP_Server_Info *server;
7fb8986e 1187 int flags = 0;
5478f9ba 1188
f96637be 1189 cifs_dbg(FYI, "disconnect session %p\n", ses);
5478f9ba
PS		 1190
1191 if (ses && (ses->server))
1192 server = ses->server;
1193 else
1194 return -EIO;
1195
eb4c7df6
SP		 1196 /* no need to send SMB logoff if uid already closed due to reconnect */
1197 if (ses->need_reconnect)
1198 goto smb2_session_already_dead;
1199
5478f9ba
PS		 1200 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
1201 if (rc)
1202 return rc;
1203
1204 /* since no tcon, smb2_init can not do this, so do here */
31473fc4 1205 req->hdr.sync_hdr.SessionId = ses->Suid;
7fb8986e
PS		 1206
1207 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
1208 flags |= CIFS_TRANSFORM_REQ;
1209 else if (server->sign)
31473fc4 1210 req->hdr.sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
5478f9ba 1211
7fb8986e 1212 rc = SendReceiveNoRsp(xid, ses, (char *) req, flags);
da502f7d 1213 cifs_small_buf_release(req);
5478f9ba
PS		 1214 /*
1215 * No tcon so can't do
1216 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1217 */
eb4c7df6
SP		 1218
1219smb2_session_already_dead:
5478f9ba
PS		 1220 return rc;
1221}
faaf946a
PS		 1222
1223static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
1224{
d60622eb 1225 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
faaf946a
PS		 1226}
1227
1228#define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1229
de9f68df
SF		 1230/* These are similar values to what Windows uses */
1231static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
1232{
1233 tcon->max_chunks = 256;
1234 tcon->max_bytes_chunk = 1048576;
1235 tcon->max_bytes_copy = 16777216;
1236}
1237
faaf946a
PS		 1238int
1239SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
1240 struct cifs_tcon *tcon, const struct nls_table *cp)
1241{
1242 struct smb2_tree_connect_req *req;
1243 struct smb2_tree_connect_rsp *rsp = NULL;
1244 struct kvec iov[2];
1b17cb43 1245 struct kvec rsp_iov = { NULL, 0 };
faaf946a
PS		 1246 int rc = 0;
1247 int resp_buftype;
1248 int unc_path_len;
faaf946a 1249 __le16 *unc_path = NULL;
7fb8986e 1250 int flags = 0;
faaf946a 1251
f96637be 1252 cifs_dbg(FYI, "TCON\n");
faaf946a 1253
68a6afa7 1254 if (!(ses->server) || !tree)
faaf946a
PS		 1255 return -EIO;
1256
faaf946a
PS		 1257 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
1258 if (unc_path == NULL)
1259 return -ENOMEM;
1260
1261 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
1262 unc_path_len *= 2;
1263 if (unc_path_len < 2) {
1264 kfree(unc_path);
1265 return -EINVAL;
1266 }
1267
806a28ef 1268 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
bb878884 1269 tcon->tid = 0;
806a28ef 1270
faaf946a
PS		 1271 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
1272 if (rc) {
1273 kfree(unc_path);
1274 return rc;
1275 }
1276
bb878884 1277 if (encryption_required(tcon))
ae6f8dd4 1278 flags |= CIFS_TRANSFORM_REQ;
faaf946a
PS		 1279
1280 iov[0].iov_base = (char *)req;
1281 /* 4 for rfc1002 length field and 1 for pad */
1282 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1283
1284 /* Testing shows that buffer offset must be at location of Buffer[0] */
1285 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
1286 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
1287 req->PathLength = cpu_to_le16(unc_path_len - 2);
1288 iov[1].iov_base = unc_path;
1289 iov[1].iov_len = unc_path_len;
1290
1291 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
1292
7fb8986e 1293 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1294 cifs_small_buf_release(req);
1295 rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
faaf946a
PS		 1296
1297 if (rc != 0) {
1298 if (tcon) {
1299 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
1300 tcon->need_reconnect = true;
1301 }
1302 goto tcon_error_exit;
1303 }
1304
cd123007
CJ		 1305 switch (rsp->ShareType) {
1306 case SMB2_SHARE_TYPE_DISK:
f96637be 1307 cifs_dbg(FYI, "connection to disk share\n");
cd123007
CJ		 1308 break;
1309 case SMB2_SHARE_TYPE_PIPE:
bb878884 1310 tcon->pipe = true;
f96637be 1311 cifs_dbg(FYI, "connection to pipe share\n");
cd123007
CJ		 1312 break;
1313 case SMB2_SHARE_TYPE_PRINT:
bb878884 1314 tcon->print = true;
f96637be 1315 cifs_dbg(FYI, "connection to printer\n");
cd123007
CJ		 1316 break;
1317 default:
f96637be 1318 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
faaf946a
PS		 1319 rc = -EOPNOTSUPP;
1320 goto tcon_error_exit;
1321 }
1322
1323 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
769ee6a4 1324 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
faaf946a
PS		 1325 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1326 tcon->tidStatus = CifsGood;
1327 tcon->need_reconnect = false;
31473fc4 1328 tcon->tid = rsp->hdr.sync_hdr.TreeId;
46b51d08 1329 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
faaf946a
PS		 1330
1331 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1332 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
f96637be 1333 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
ae6f8dd4
PS		 1334
1335 if (tcon->seal &&
1336 !(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
1337 cifs_dbg(VFS, "Encryption is requested but not supported\n");
1338
de9f68df 1339 init_copy_chunk_defaults(tcon);
ff1c038a
SF		 1340 if (tcon->ses->server->ops->validate_negotiate)
1341 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
faaf946a
PS		 1342tcon_exit:
1343 free_rsp_buf(resp_buftype, rsp);
1344 kfree(unc_path);
1345 return rc;
1346
1347tcon_error_exit:
1b17cb43 1348 if (rsp && rsp->hdr.sync_hdr.Status == STATUS_BAD_NETWORK_NAME) {
f96637be 1349 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
faaf946a
PS		 1350 }
1351 goto tcon_exit;
1352}
1353
1354int
1355SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1356{
1357 struct smb2_tree_disconnect_req *req; /* response is trivial */
1358 int rc = 0;
faaf946a 1359 struct cifs_ses *ses = tcon->ses;
7fb8986e 1360 int flags = 0;
faaf946a 1361
f96637be 1362 cifs_dbg(FYI, "Tree Disconnect\n");
faaf946a 1363
68a6afa7 1364 if (!ses || !(ses->server))
faaf946a
PS		 1365 return -EIO;
1366
1367 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1368 return 0;
1369
1370 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
1371 if (rc)
1372 return rc;
1373
7fb8986e
PS		 1374 if (encryption_required(tcon))
1375 flags |= CIFS_TRANSFORM_REQ;
1376
1377 rc = SendReceiveNoRsp(xid, ses, (char *)req, flags);
da502f7d 1378 cifs_small_buf_release(req);
faaf946a
PS		 1379 if (rc)
1380 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1381
1382 return rc;
1383}
2503a0db 1384
b8c32dbb 1385
63eb3def
PS		 1386static struct create_durable *
1387create_durable_buf(void)
1388{
1389 struct create_durable *buf;
1390
1391 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1392 if (!buf)
1393 return NULL;
1394
1395 buf->ccontext.DataOffset = cpu_to_le16(offsetof
9cbc0b73 1396 (struct create_durable, Data));
63eb3def
PS		 1397 buf->ccontext.DataLength = cpu_to_le32(16);
1398 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1399 (struct create_durable, Name));
1400 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 1401 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
63eb3def
PS		 1402 buf->Name[0] = 'D';
1403 buf->Name[1] = 'H';
1404 buf->Name[2] = 'n';
1405 buf->Name[3] = 'Q';
1406 return buf;
1407}
1408
9cbc0b73
PS		 1409static struct create_durable *
1410create_reconnect_durable_buf(struct cifs_fid *fid)
1411{
1412 struct create_durable *buf;
1413
1414 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1415 if (!buf)
1416 return NULL;
1417
1418 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1419 (struct create_durable, Data));
1420 buf->ccontext.DataLength = cpu_to_le32(16);
1421 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1422 (struct create_durable, Name));
1423 buf->ccontext.NameLength = cpu_to_le16(4);
1424 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1425 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
12197a7f 1426 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
9cbc0b73
PS		 1427 buf->Name[0] = 'D';
1428 buf->Name[1] = 'H';
1429 buf->Name[2] = 'n';
1430 buf->Name[3] = 'C';
1431 return buf;
1432}
1433
b8c32dbb 1434static __u8
42873b0a
PS		 1435parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
1436 unsigned int *epoch)
b8c32dbb
PS		 1437{
1438 char *data_offset;
b5c7cde3 1439 struct create_context *cc;
deb7deff
JM		 1440 unsigned int next;
1441 unsigned int remaining;
fd554396 1442 char *name;
b8c32dbb 1443
fd554396 1444 data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
deb7deff 1445 remaining = le32_to_cpu(rsp->CreateContextsLength);
b5c7cde3 1446 cc = (struct create_context *)data_offset;
deb7deff 1447 while (remaining >= sizeof(struct create_context)) {
b5c7cde3 1448 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
deb7deff
JM		 1449 if (le16_to_cpu(cc->NameLength) == 4 &&
1450 strncmp(name, "RqLs", 4) == 0)
1451 return server->ops->parse_lease_buf(cc, epoch);
1452
1453 next = le32_to_cpu(cc->Next);
1454 if (!next)
1455 break;
1456 remaining -= next;
1457 cc = (struct create_context *)((char *)cc + next);
1458 }
b8c32dbb 1459
b5c7cde3 1460 return 0;
b8c32dbb
PS		 1461}
1462
d22cbfec 1463static int
a41a28bd
PS		 1464add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1465 unsigned int *num_iovec, __u8 *oplock)
d22cbfec
PS		 1466{
1467 struct smb2_create_req *req = iov[0].iov_base;
1468 unsigned int num = *num_iovec;
1469
a41a28bd 1470 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
d22cbfec
PS		 1471 if (iov[num].iov_base == NULL)
1472 return -ENOMEM;
a41a28bd 1473 iov[num].iov_len = server->vals->create_lease_size;
d22cbfec
PS		 1474 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1475 if (!req->CreateContextsOffset)
1476 req->CreateContextsOffset = cpu_to_le32(
1477 sizeof(struct smb2_create_req) - 4 +
1478 iov[num - 1].iov_len);
a41a28bd
PS		 1479 le32_add_cpu(&req->CreateContextsLength,
1480 server->vals->create_lease_size);
1481 inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
d22cbfec
PS		 1482 *num_iovec = num + 1;
1483 return 0;
1484}
1485
b56eae4d
SF		 1486static struct create_durable_v2 *
1487create_durable_v2_buf(struct cifs_fid *pfid)
1488{
1489 struct create_durable_v2 *buf;
1490
1491 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
1492 if (!buf)
1493 return NULL;
1494
1495 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1496 (struct create_durable_v2, dcontext));
1497 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
1498 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1499 (struct create_durable_v2, Name));
1500 buf->ccontext.NameLength = cpu_to_le16(4);
1501
1502 buf->dcontext.Timeout = 0; /* Should this be configurable by workload */
1503 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
fa70b87c 1504 generate_random_uuid(buf->dcontext.CreateGuid);
b56eae4d
SF		 1505 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
1506
1507 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1508 buf->Name[0] = 'D';
1509 buf->Name[1] = 'H';
1510 buf->Name[2] = '2';
1511 buf->Name[3] = 'Q';
1512 return buf;
1513}
1514
1515static struct create_durable_handle_reconnect_v2 *
1516create_reconnect_durable_v2_buf(struct cifs_fid *fid)
1517{
1518 struct create_durable_handle_reconnect_v2 *buf;
1519
1520 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
1521 GFP_KERNEL);
1522 if (!buf)
1523 return NULL;
1524
1525 buf->ccontext.DataOffset =
1526 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1527 dcontext));
1528 buf->ccontext.DataLength =
1529 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
1530 buf->ccontext.NameOffset =
1531 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1532 Name));
1533 buf->ccontext.NameLength = cpu_to_le16(4);
1534
1535 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
1536 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
1537 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1538 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
1539
1540 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1541 buf->Name[0] = 'D';
1542 buf->Name[1] = 'H';
1543 buf->Name[2] = '2';
1544 buf->Name[3] = 'C';
1545 return buf;
1546}
1547
63eb3def 1548static int
b56eae4d
SF		 1549add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
1550 struct cifs_open_parms *oparms)
1551{
1552 struct smb2_create_req *req = iov[0].iov_base;
1553 unsigned int num = *num_iovec;
1554
1555 iov[num].iov_base = create_durable_v2_buf(oparms->fid);
1556 if (iov[num].iov_base == NULL)
1557 return -ENOMEM;
1558 iov[num].iov_len = sizeof(struct create_durable_v2);
1559 if (!req->CreateContextsOffset)
1560 req->CreateContextsOffset =
1561 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1562 iov[1].iov_len);
1563 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
1564 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable_v2));
1565 *num_iovec = num + 1;
1566 return 0;
1567}
1568
1569static int
1570add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
9cbc0b73 1571 struct cifs_open_parms *oparms)
63eb3def
PS		 1572{
1573 struct smb2_create_req *req = iov[0].iov_base;
1574 unsigned int num = *num_iovec;
1575
b56eae4d
SF		 1576 /* indicate that we don't need to relock the file */
1577 oparms->reconnect = false;
1578
1579 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
1580 if (iov[num].iov_base == NULL)
1581 return -ENOMEM;
1582 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
1583 if (!req->CreateContextsOffset)
1584 req->CreateContextsOffset =
1585 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1586 iov[1].iov_len);
1587 le32_add_cpu(&req->CreateContextsLength,
1588 sizeof(struct create_durable_handle_reconnect_v2));
1589 inc_rfc1001_len(&req->hdr,
1590 sizeof(struct create_durable_handle_reconnect_v2));
1591 *num_iovec = num + 1;
1592 return 0;
1593}
1594
1595static int
1596add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1597 struct cifs_open_parms *oparms, bool use_persistent)
1598{
1599 struct smb2_create_req *req = iov[0].iov_base;
1600 unsigned int num = *num_iovec;
1601
1602 if (use_persistent) {
1603 if (oparms->reconnect)
1604 return add_durable_reconnect_v2_context(iov, num_iovec,
1605 oparms);
1606 else
1607 return add_durable_v2_context(iov, num_iovec, oparms);
1608 }
1609
9cbc0b73
PS		 1610 if (oparms->reconnect) {
1611 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1612 /* indicate that we don't need to relock the file */
1613 oparms->reconnect = false;
1614 } else
1615 iov[num].iov_base = create_durable_buf();
63eb3def
PS		 1616 if (iov[num].iov_base == NULL)
1617 return -ENOMEM;
1618 iov[num].iov_len = sizeof(struct create_durable);
1619 if (!req->CreateContextsOffset)
1620 req->CreateContextsOffset =
1621 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1622 iov[1].iov_len);
31f92e9a 1623 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
63eb3def
PS		 1624 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
1625 *num_iovec = num + 1;
1626 return 0;
1627}
1628
f0712928
AA		 1629static int
1630alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
1631 const char *treename, const __le16 *path)
1632{
1633 int treename_len, path_len;
1634 struct nls_table *cp;
1635 const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
1636
1637 /*
1638 * skip leading "\\"
1639 */
1640 treename_len = strlen(treename);
1641 if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\'))
1642 return -EINVAL;
1643
1644 treename += 2;
1645 treename_len -= 2;
1646
1647 path_len = UniStrnlen((wchar_t *)path, PATH_MAX);
1648
1649 /*
1650 * make room for one path separator between the treename and
1651 * path
1652 */
1653 *out_len = treename_len + 1 + path_len;
1654
1655 /*
1656 * final path needs to be null-terminated UTF16 with a
1657 * size aligned to 8
1658 */
1659
1660 *out_size = roundup((*out_len+1)*2, 8);
1661 *out_path = kzalloc(*out_size, GFP_KERNEL);
1662 if (!*out_path)
1663 return -ENOMEM;
1664
1665 cp = load_nls_default();
1666 cifs_strtoUTF16(*out_path, treename, treename_len, cp);
1667 UniStrcat(*out_path, sep);
1668 UniStrcat(*out_path, path);
1669 unload_nls(cp);
1670
1671 return 0;
1672}
1673
2503a0db 1674int
064f6047 1675SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
b42bf888
PS		 1676 __u8 *oplock, struct smb2_file_all_info *buf,
1677 struct smb2_err_rsp **err_buf)
2503a0db
PS		 1678{
1679 struct smb2_create_req *req;
1680 struct smb2_create_rsp *rsp;
1681 struct TCP_Server_Info *server;
064f6047 1682 struct cifs_tcon *tcon = oparms->tcon;
2503a0db 1683 struct cifs_ses *ses = tcon->ses;
63eb3def 1684 struct kvec iov[4];
7da7c958 1685 struct kvec rsp_iov = {NULL, 0};
2503a0db
PS		 1686 int resp_buftype;
1687 int uni_path_len;
b8c32dbb
PS		 1688 __le16 *copy_path = NULL;
1689 int copy_size;
2503a0db 1690 int rc = 0;
da502f7d 1691 unsigned int n_iov = 2;
ca81983f 1692 __u32 file_attributes = 0;
663a9621 1693 char *dhc_buf = NULL, *lc_buf = NULL;
7fb8986e 1694 int flags = 0;
2503a0db 1695
f96637be 1696 cifs_dbg(FYI, "create/open\n");
2503a0db
PS		 1697
1698 if (ses && (ses->server))
1699 server = ses->server;
1700 else
1701 return -EIO;
1702
1703 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
1704 if (rc)
1705 return rc;
1706
7fb8986e
PS		 1707 if (encryption_required(tcon))
1708 flags |= CIFS_TRANSFORM_REQ;
1709
064f6047 1710 if (oparms->create_options & CREATE_OPTION_READONLY)
ca81983f 1711 file_attributes |= ATTR_READONLY;
db8b631d
SF		 1712 if (oparms->create_options & CREATE_OPTION_SPECIAL)
1713 file_attributes |= ATTR_SYSTEM;
ca81983f 1714
2503a0db 1715 req->ImpersonationLevel = IL_IMPERSONATION;
064f6047 1716 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
2503a0db
PS		 1717 /* File attributes ignored on open (used in create though) */
1718 req->FileAttributes = cpu_to_le32(file_attributes);
1719 req->ShareAccess = FILE_SHARE_ALL_LE;
064f6047
PS		 1720 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1721 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
2503a0db
PS		 1722
1723 iov[0].iov_base = (char *)req;
1724 /* 4 for rfc1002 length field */
1725 iov[0].iov_len = get_rfc1002_length(req) + 4;
59aa3718
PS		 1726 /* -1 since last byte is buf[0] which is sent below (path) */
1727 iov[0].iov_len--;
f0712928
AA		 1728
1729 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
1730
1731 /* [MS-SMB2] 2.2.13 NameOffset:
1732 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
1733 * the SMB2 header, the file name includes a prefix that will
1734 * be processed during DFS name normalization as specified in
1735 * section 3.3.5.9. Otherwise, the file name is relative to
1736 * the share that is identified by the TreeId in the SMB2
1737 * header.
1738 */
1739 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
1740 int name_len;
1741
1742 req->hdr.sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
1743 rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
1744 &name_len,
1745 tcon->treeName, path);
1746 if (rc)
1747 return rc;
1748 req->NameLength = cpu_to_le16(name_len * 2);
59aa3718
PS		 1749 uni_path_len = copy_size;
1750 path = copy_path;
f0712928
AA		 1751 } else {
1752 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
1753 /* MUST set path len (NameLength) to 0 opening root of share */
1754 req->NameLength = cpu_to_le16(uni_path_len - 2);
1755 if (uni_path_len % 8 != 0) {
1756 copy_size = roundup(uni_path_len, 8);
1757 copy_path = kzalloc(copy_size, GFP_KERNEL);
1758 if (!copy_path)
1759 return -ENOMEM;
1760 memcpy((char *)copy_path, (const char *)path,
1761 uni_path_len);
1762 uni_path_len = copy_size;
1763 path = copy_path;
1764 }
2503a0db
PS		 1765 }
1766
59aa3718
PS		 1767 iov[1].iov_len = uni_path_len;
1768 iov[1].iov_base = path;
1769 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1770 inc_rfc1001_len(req, uni_path_len - 1);
1771
b8c32dbb
PS		 1772 if (!server->oplocks)
1773 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1774
a41a28bd 1775 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
b8c32dbb
PS		 1776 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1777 req->RequestedOplockLevel = *oplock;
1778 else {
da502f7d 1779 rc = add_lease_context(server, iov, &n_iov, oplock);
d22cbfec 1780 if (rc) {
b8c32dbb
PS		 1781 cifs_small_buf_release(req);
1782 kfree(copy_path);
d22cbfec 1783 return rc;
b8c32dbb 1784 }
da502f7d 1785 lc_buf = iov[n_iov-1].iov_base;
b8c32dbb
PS		 1786 }
1787
63eb3def
PS		 1788 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1789 /* need to set Next field of lease context if we request it */
a41a28bd 1790 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
63eb3def 1791 struct create_context *ccontext =
da502f7d 1792 (struct create_context *)iov[n_iov-1].iov_base;
1c46943f 1793 ccontext->Next =
a41a28bd 1794 cpu_to_le32(server->vals->create_lease_size);
63eb3def 1795 }
b56eae4d 1796
da502f7d 1797 rc = add_durable_context(iov, &n_iov, oparms,
b56eae4d 1798 tcon->use_persistent);
63eb3def
PS		 1799 if (rc) {
1800 cifs_small_buf_release(req);
1801 kfree(copy_path);
663a9621 1802 kfree(lc_buf);
63eb3def
PS		 1803 return rc;
1804 }
da502f7d 1805 dhc_buf = iov[n_iov-1].iov_base;
63eb3def
PS		 1806 }
1807
7fb8986e 1808 rc = SendReceive2(xid, ses, iov, n_iov, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1809 cifs_small_buf_release(req);
1810 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2503a0db
PS		 1811
1812 if (rc != 0) {
1813 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
7da7c958 1814 if (err_buf && rsp)
b42bf888
PS		 1815 *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
1816 GFP_KERNEL);
2503a0db
PS		 1817 goto creat_exit;
1818 }
1819
064f6047
PS		 1820 oparms->fid->persistent_fid = rsp->PersistentFileId;
1821 oparms->fid->volatile_fid = rsp->VolatileFileId;
f0df737e
PS		 1822
1823 if (buf) {
1824 memcpy(buf, &rsp->CreationTime, 32);
1825 buf->AllocationSize = rsp->AllocationSize;
1826 buf->EndOfFile = rsp->EndofFile;
1827 buf->Attributes = rsp->FileAttributes;
1828 buf->NumberOfLinks = cpu_to_le32(1);
1829 buf->DeletePending = 0;
1830 }
2e44b288 1831
b8c32dbb 1832 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
42873b0a 1833 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
b8c32dbb
PS		 1834 else
1835 *oplock = rsp->OplockLevel;
2503a0db 1836creat_exit:
b8c32dbb 1837 kfree(copy_path);
663a9621
PS		 1838 kfree(lc_buf);
1839 kfree(dhc_buf);
2503a0db
PS		 1840 free_rsp_buf(resp_buftype, rsp);
1841 return rc;
1842}
1843
4a72dafa
SF		 1844/*
1845 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1846 */
1847int
1848SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
0dc8cfba 1849 u64 volatile_fid, u32 opcode, bool is_fsctl,
51146625
AA		 1850 char *in_data, u32 indatalen,
1851 char **out_data, u32 *plen /* returned data len */)
4a72dafa
SF		 1852{
1853 struct smb2_ioctl_req *req;
1854 struct smb2_ioctl_rsp *rsp;
31473fc4 1855 struct smb2_sync_hdr *shdr;
8e353106 1856 struct cifs_ses *ses;
4a72dafa 1857 struct kvec iov[2];
da502f7d 1858 struct kvec rsp_iov;
4a72dafa 1859 int resp_buftype;
da502f7d 1860 int n_iov;
4a72dafa 1861 int rc = 0;
7fb8986e 1862 int flags = 0;
4a72dafa
SF		 1863
1864 cifs_dbg(FYI, "SMB2 IOCTL\n");
1865
3d1a3745
SF		 1866 if (out_data != NULL)
1867 *out_data = NULL;
1868
4a72dafa
SF		 1869 /* zero out returned data len, in case of error */
1870 if (plen)
1871 *plen = 0;
1872
8e353106
SF		 1873 if (tcon)
1874 ses = tcon->ses;
1875 else
1876 return -EIO;
1877
68a6afa7 1878 if (!ses || !(ses->server))
4a72dafa
SF		 1879 return -EIO;
1880
1881 rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req);
1882 if (rc)
1883 return rc;
1884
7fb8986e
PS		 1885 if (encryption_required(tcon))
1886 flags |= CIFS_TRANSFORM_REQ;
1887
4a72dafa
SF		 1888 req->CtlCode = cpu_to_le32(opcode);
1889 req->PersistentFileId = persistent_fid;
1890 req->VolatileFileId = volatile_fid;
1891
1892 if (indatalen) {
1893 req->InputCount = cpu_to_le32(indatalen);
1894 /* do not set InputOffset if no input data */
1895 req->InputOffset =
1896 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4);
1897 iov[1].iov_base = in_data;
1898 iov[1].iov_len = indatalen;
da502f7d 1899 n_iov = 2;
4a72dafa 1900 } else
da502f7d 1901 n_iov = 1;
4a72dafa
SF		 1902
1903 req->OutputOffset = 0;
1904 req->OutputCount = 0; /* MBZ */
1905
1906 /*
1907 * Could increase MaxOutputResponse, but that would require more
1908 * than one credit. Windows typically sets this smaller, but for some
1909 * ioctls it may be useful to allow server to send more. No point
1910 * limiting what the server can send as long as fits in one credit
7db0a6ef
SF		 1911 * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE
1912 * (by default, note that it can be overridden to make max larger)
1913 * in responses (except for read responses which can be bigger.
1914 * We may want to bump this limit up
4a72dafa 1915 */
7db0a6ef 1916 req->MaxOutputResponse = cpu_to_le32(CIFSMaxBufSize);
4a72dafa
SF		 1917
1918 if (is_fsctl)
1919 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
1920 else
1921 req->Flags = 0;
1922
1923 iov[0].iov_base = (char *)req;
4a72dafa 1924
7ff8d45c
SF		 1925 /*
1926 * If no input data, the size of ioctl struct in
1927 * protocol spec still includes a 1 byte data buffer,
1928 * but if input data passed to ioctl, we do not
1929 * want to double count this, so we do not send
1930 * the dummy one byte of data in iovec[0] if sending
1931 * input data (in iovec[1]). We also must add 4 bytes
1932 * in first iovec to allow for rfc1002 length field.
1933 */
1934
1935 if (indatalen) {
1936 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1937 inc_rfc1001_len(req, indatalen - 1);
1938 } else
1939 iov[0].iov_len = get_rfc1002_length(req) + 4;
1940
78332c6f
SF		 1941 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
1942 if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO)
1943 req->hdr.sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
4a72dafa 1944
7fb8986e 1945 rc = SendReceive2(xid, ses, iov, n_iov, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1946 cifs_small_buf_release(req);
1947 rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
4a72dafa 1948
9bf0c9cd 1949 if ((rc != 0) && (rc != -EINVAL)) {
8e353106 1950 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
4a72dafa 1951 goto ioctl_exit;
9bf0c9cd
SF		 1952 } else if (rc == -EINVAL) {
1953 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
1954 (opcode != FSCTL_SRV_COPYCHUNK)) {
8e353106 1955 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
9bf0c9cd
SF		 1956 goto ioctl_exit;
1957 }
4a72dafa
SF		 1958 }
1959
1960 /* check if caller wants to look at return data or just return rc */
1961 if ((plen == NULL) || (out_data == NULL))
1962 goto ioctl_exit;
1963
1964 *plen = le32_to_cpu(rsp->OutputCount);
1965
1966 /* We check for obvious errors in the output buffer length and offset */
1967 if (*plen == 0)
1968 goto ioctl_exit; /* server returned no data */
1969 else if (*plen > 0xFF00) {
1970 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
1971 *plen = 0;
1972 rc = -EIO;
1973 goto ioctl_exit;
1974 }
1975
1976 if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
1977 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
1978 le32_to_cpu(rsp->OutputOffset));
1979 *plen = 0;
1980 rc = -EIO;
1981 goto ioctl_exit;
1982 }
1983
1984 *out_data = kmalloc(*plen, GFP_KERNEL);
1985 if (*out_data == NULL) {
1986 rc = -ENOMEM;
1987 goto ioctl_exit;
1988 }
1989
31473fc4
PS		 1990 shdr = get_sync_hdr(rsp);
1991 memcpy(*out_data, (char *)shdr + le32_to_cpu(rsp->OutputOffset), *plen);
4a72dafa
SF		 1992ioctl_exit:
1993 free_rsp_buf(resp_buftype, rsp);
1994 return rc;
1995}
1996
64a5cfa6
SF		 1997/*
1998 * Individual callers to ioctl worker function follow
1999 */
2000
2001int
2002SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2003 u64 persistent_fid, u64 volatile_fid)
2004{
2005 int rc;
64a5cfa6
SF		 2006 struct compress_ioctl fsctl_input;
2007 char *ret_data = NULL;
2008
2009 fsctl_input.CompressionState =
bc09d141 2010 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
64a5cfa6
SF		 2011
2012 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
2013 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
2014 (char *)&fsctl_input /* data input */,
2015 2 /* in data len */, &ret_data /* out data */, NULL);
2016
2017 cifs_dbg(FYI, "set compression rc %d\n", rc);
64a5cfa6
SF		 2018
2019 return rc;
2020}
2021
2503a0db
PS		 2022int
2023SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
2024 u64 persistent_fid, u64 volatile_fid)
2025{
2026 struct smb2_close_req *req;
2027 struct smb2_close_rsp *rsp;
2503a0db
PS		 2028 struct cifs_ses *ses = tcon->ses;
2029 struct kvec iov[1];
da502f7d 2030 struct kvec rsp_iov;
2503a0db
PS		 2031 int resp_buftype;
2032 int rc = 0;
7fb8986e 2033 int flags = 0;
2503a0db 2034
f96637be 2035 cifs_dbg(FYI, "Close\n");
2503a0db 2036
68a6afa7 2037 if (!ses || !(ses->server))
2503a0db
PS		 2038 return -EIO;
2039
2040 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
2041 if (rc)
2042 return rc;
2043
7fb8986e
PS		 2044 if (encryption_required(tcon))
2045 flags |= CIFS_TRANSFORM_REQ;
2046
2503a0db
PS		 2047 req->PersistentFileId = persistent_fid;
2048 req->VolatileFileId = volatile_fid;
2049
2050 iov[0].iov_base = (char *)req;
2051 /* 4 for rfc1002 length field */
2052 iov[0].iov_len = get_rfc1002_length(req) + 4;
2053
7fb8986e 2054 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2055 cifs_small_buf_release(req);
2056 rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
2503a0db
PS		 2057
2058 if (rc != 0) {
d4a029d2 2059 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
2503a0db
PS		 2060 goto close_exit;
2061 }
2062
2503a0db
PS		 2063 /* BB FIXME - decode close response, update inode for caching */
2064
2065close_exit:
2066 free_rsp_buf(resp_buftype, rsp);
2067 return rc;
2068}
be4cb9e3
PS		 2069
2070static int
2071validate_buf(unsigned int offset, unsigned int buffer_length,
2072 struct smb2_hdr *hdr, unsigned int min_buf_size)
2073
2074{
2075 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
2076 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
2077 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
2078 char *end_of_buf = begin_of_buf + buffer_length;
2079
2080
2081 if (buffer_length < min_buf_size) {
f96637be
JP		 2082 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
2083 buffer_length, min_buf_size);
be4cb9e3
PS		 2084 return -EINVAL;
2085 }
2086
2087 /* check if beyond RFC1001 maximum length */
2088 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
f96637be
JP		 2089 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
2090 buffer_length, smb_len);
be4cb9e3
PS		 2091 return -EINVAL;
2092 }
2093
2094 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
f96637be 2095 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
be4cb9e3
PS		 2096 return -EINVAL;
2097 }
2098
2099 return 0;
2100}
2101
2102/*
2103 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2104 * Caller must free buffer.
2105 */
2106static int
2107validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
2108 struct smb2_hdr *hdr, unsigned int minbufsize,
2109 char *data)
2110
2111{
2112 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
2113 int rc;
2114
2115 if (!data)
2116 return -EINVAL;
2117
2118 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
2119 if (rc)
2120 return rc;
2121
2122 memcpy(data, begin_of_buf, buffer_length);
2123
2124 return 0;
2125}
2126
f0df737e
PS		 2127static int
2128query_info(const unsigned int xid, struct cifs_tcon *tcon,
42c493c1
SP		 2129 u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
2130 u32 additional_info, size_t output_len, size_t min_len, void **data,
2131 u32 *dlen)
be4cb9e3
PS		 2132{
2133 struct smb2_query_info_req *req;
2134 struct smb2_query_info_rsp *rsp = NULL;
2135 struct kvec iov[2];
da502f7d 2136 struct kvec rsp_iov;
be4cb9e3
PS		 2137 int rc = 0;
2138 int resp_buftype;
be4cb9e3 2139 struct cifs_ses *ses = tcon->ses;
7fb8986e 2140 int flags = 0;
be4cb9e3 2141
f96637be 2142 cifs_dbg(FYI, "Query Info\n");
be4cb9e3 2143
68a6afa7 2144 if (!ses || !(ses->server))
be4cb9e3
PS		 2145 return -EIO;
2146
2147 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2148 if (rc)
2149 return rc;
2150
7fb8986e
PS		 2151 if (encryption_required(tcon))
2152 flags |= CIFS_TRANSFORM_REQ;
2153
42c493c1 2154 req->InfoType = info_type;
f0df737e 2155 req->FileInfoClass = info_class;
be4cb9e3
PS		 2156 req->PersistentFileId = persistent_fid;
2157 req->VolatileFileId = volatile_fid;
42c493c1 2158 req->AdditionalInformation = cpu_to_le32(additional_info);
be4cb9e3
PS		 2159 /* 4 for rfc1002 length field and 1 for Buffer */
2160 req->InputBufferOffset =
2161 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
f0df737e 2162 req->OutputBufferLength = cpu_to_le32(output_len);
be4cb9e3
PS		 2163
2164 iov[0].iov_base = (char *)req;
2165 /* 4 for rfc1002 length field */
2166 iov[0].iov_len = get_rfc1002_length(req) + 4;
2167
7fb8986e 2168 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2169 cifs_small_buf_release(req);
2170 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
e5d04887 2171
be4cb9e3
PS		 2172 if (rc) {
2173 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2174 goto qinf_exit;
2175 }
2176
42c493c1
SP		 2177 if (dlen) {
2178 *dlen = le32_to_cpu(rsp->OutputBufferLength);
2179 if (!*data) {
2180 *data = kmalloc(*dlen, GFP_KERNEL);
2181 if (!*data) {
2182 cifs_dbg(VFS,
2183 "Error %d allocating memory for acl\n",
2184 rc);
2185 *dlen = 0;
2186 goto qinf_exit;
2187 }
2188 }
2189 }
2190
be4cb9e3
PS		 2191 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
2192 le32_to_cpu(rsp->OutputBufferLength),
42c493c1 2193 &rsp->hdr, min_len, *data);
be4cb9e3
PS		 2194
2195qinf_exit:
2196 free_rsp_buf(resp_buftype, rsp);
2197 return rc;
2198}
9094fad1 2199
42c493c1
SP		 2200int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
2201 u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data)
2202{
2203 return query_info(xid, tcon, persistent_fid, volatile_fid,
2204 FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0,
2205 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
2206 sizeof(struct smb2_file_all_info), (void **)&data,
2207 NULL);
2208}
2209
f0df737e 2210int
42c493c1 2211SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
f0df737e 2212 u64 persistent_fid, u64 volatile_fid,
42c493c1 2213 void **data, u32 *plen)
f0df737e 2214{
42c493c1
SP		 2215 __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO;
2216 *plen = 0;
2217
f0df737e 2218 return query_info(xid, tcon, persistent_fid, volatile_fid,
42c493c1
SP		 2219 0, SMB2_O_INFO_SECURITY, additional_info,
2220 SMB2_MAX_BUFFER_SIZE,
2221 sizeof(struct smb2_file_all_info), data, plen);
f0df737e
PS		 2222}
2223
2224int
2225SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
2226 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
2227{
2228 return query_info(xid, tcon, persistent_fid, volatile_fid,
42c493c1
SP		 2229 FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0,
2230 sizeof(struct smb2_file_internal_info),
f0df737e 2231 sizeof(struct smb2_file_internal_info),
42c493c1 2232 (void **)&uniqueid, NULL);
f0df737e
PS		 2233}
2234
9094fad1
PS		 2235/*
2236 * This is a no-op for now. We're not really interested in the reply, but
2237 * rather in the fact that the server sent one and that server->lstrp
2238 * gets updated.
2239 *
2240 * FIXME: maybe we should consider checking that the reply matches request?
2241 */
2242static void
2243smb2_echo_callback(struct mid_q_entry *mid)
2244{
2245 struct TCP_Server_Info *server = mid->callback_data;
31473fc4 2246 struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
9094fad1
PS		 2247 unsigned int credits_received = 1;
2248
2249 if (mid->mid_state == MID_RESPONSE_RECEIVED)
31473fc4 2250 credits_received = le16_to_cpu(rsp->hdr.sync_hdr.CreditRequest);
9094fad1
PS		 2251
2252 DeleteMidQEntry(mid);
2253 add_credits(server, credits_received, CIFS_ECHO_OP);
2254}
2255
53e0e11e
PS		 2256void smb2_reconnect_server(struct work_struct *work)
2257{
2258 struct TCP_Server_Info *server = container_of(work,
2259 struct TCP_Server_Info, reconnect.work);
2260 struct cifs_ses *ses;
2261 struct cifs_tcon *tcon, *tcon2;
2262 struct list_head tmp_list;
2263 int tcon_exist = false;
18ea4311
GP		 2264 int rc;
2265 int resched = false;
2266
53e0e11e
PS		 2267
2268 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2269 mutex_lock(&server->reconnect_mutex);
2270
2271 INIT_LIST_HEAD(&tmp_list);
2272 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
2273
2274 spin_lock(&cifs_tcp_ses_lock);
2275 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2276 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
96a988ff 2277 if (tcon->need_reconnect || tcon->need_reopen_files) {
53e0e11e
PS		 2278 tcon->tc_count++;
2279 list_add_tail(&tcon->rlist, &tmp_list);
2280 tcon_exist = true;
2281 }
2282 }
bb878884
AA		 2283 if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) {
2284 list_add_tail(&ses->tcon_ipc->rlist, &tmp_list);
2285 tcon_exist = true;
2286 }
53e0e11e
PS		 2287 }
2288 /*
2289 * Get the reference to server struct to be sure that the last call of
2290 * cifs_put_tcon() in the loop below won't release the server pointer.
2291 */
2292 if (tcon_exist)
2293 server->srv_count++;
2294
2295 spin_unlock(&cifs_tcp_ses_lock);
2296
2297 list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
18ea4311
GP		 2298 rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon);
2299 if (!rc)
96a988ff 2300 cifs_reopen_persistent_handles(tcon);
18ea4311
GP		 2301 else
2302 resched = true;
53e0e11e
PS		 2303 list_del_init(&tcon->rlist);
2304 cifs_put_tcon(tcon);
2305 }
2306
2307 cifs_dbg(FYI, "Reconnecting tcons finished\n");
18ea4311
GP		 2308 if (resched)
2309 queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
53e0e11e
PS		 2310 mutex_unlock(&server->reconnect_mutex);
2311
2312 /* now we can safely release srv struct */
2313 if (tcon_exist)
2314 cifs_put_tcp_session(server, 1);
2315}
2316
9094fad1
PS		 2317int
2318SMB2_echo(struct TCP_Server_Info *server)
2319{
2320 struct smb2_echo_req *req;
2321 int rc = 0;
738f9de5
PS		 2322 struct kvec iov[2];
2323 struct smb_rqst rqst = { .rq_iov = iov,
2324 .rq_nvec = 2 };
9094fad1 2325
f96637be 2326 cifs_dbg(FYI, "In echo request\n");
9094fad1 2327
4fcd1813 2328 if (server->tcpStatus == CifsNeedNegotiate) {
53e0e11e
PS		 2329 /* No need to send echo on newly established connections */
2330 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
2331 return rc;
4fcd1813
SF		 2332 }
2333
9094fad1
PS		 2334 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
2335 if (rc)
2336 return rc;
2337
31473fc4 2338 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
9094fad1 2339
9094fad1 2340 /* 4 for rfc1002 length field */
738f9de5
PS		 2341 iov[0].iov_len = 4;
2342 iov[0].iov_base = (char *)req;
2343 iov[1].iov_len = get_rfc1002_length(req);
2344 iov[1].iov_base = (char *)req + 4;
9094fad1 2345
9b7c18a2
PS		 2346 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
2347 server, CIFS_ECHO_OP);
9094fad1 2348 if (rc)
f96637be 2349 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
9094fad1
PS		 2350
2351 cifs_small_buf_release(req);
2352 return rc;
2353}
7a5cfb19
PS		 2354
2355int
2356SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2357 u64 volatile_fid)
2358{
2359 struct smb2_flush_req *req;
7a5cfb19
PS		 2360 struct cifs_ses *ses = tcon->ses;
2361 struct kvec iov[1];
da502f7d 2362 struct kvec rsp_iov;
7a5cfb19
PS		 2363 int resp_buftype;
2364 int rc = 0;
7fb8986e 2365 int flags = 0;
7a5cfb19 2366
f96637be 2367 cifs_dbg(FYI, "Flush\n");
7a5cfb19 2368
68a6afa7 2369 if (!ses || !(ses->server))
7a5cfb19
PS		 2370 return -EIO;
2371
2372 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
2373 if (rc)
2374 return rc;
2375
7fb8986e
PS		 2376 if (encryption_required(tcon))
2377 flags |= CIFS_TRANSFORM_REQ;
2378
7a5cfb19
PS		 2379 req->PersistentFileId = persistent_fid;
2380 req->VolatileFileId = volatile_fid;
2381
2382 iov[0].iov_base = (char *)req;
2383 /* 4 for rfc1002 length field */
2384 iov[0].iov_len = get_rfc1002_length(req) + 4;
2385
7fb8986e 2386 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d 2387 cifs_small_buf_release(req);
7a5cfb19 2388
dfebe400 2389 if (rc != 0)
7a5cfb19
PS		 2390 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
2391
da502f7d 2392 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
7a5cfb19
PS		 2393 return rc;
2394}
09a4707e
PS		 2395
2396/*
2397 * To form a chain of read requests, any read requests after the first should
2398 * have the end_of_chain boolean set to true.
2399 */
2400static int
738f9de5
PS		 2401smb2_new_read_req(void **buf, unsigned int *total_len,
2402 struct cifs_io_parms *io_parms, unsigned int remaining_bytes,
2403 int request_type)
09a4707e
PS		 2404{
2405 int rc = -EACCES;
b8f57ee8 2406 struct smb2_read_plain_req *req = NULL;
31473fc4 2407 struct smb2_sync_hdr *shdr;
09a4707e 2408
b8f57ee8
PS		 2409 rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
2410 total_len);
09a4707e
PS		 2411 if (rc)
2412 return rc;
2413 if (io_parms->tcon->ses->server == NULL)
2414 return -ECONNABORTED;
2415
b8f57ee8 2416 shdr = &req->sync_hdr;
31473fc4 2417 shdr->ProcessId = cpu_to_le32(io_parms->pid);
09a4707e
PS		 2418
2419 req->PersistentFileId = io_parms->persistent_fid;
2420 req->VolatileFileId = io_parms->volatile_fid;
2421 req->ReadChannelInfoOffset = 0; /* reserved */
2422 req->ReadChannelInfoLength = 0; /* reserved */
2423 req->Channel = 0; /* reserved */
2424 req->MinimumCount = 0;
2425 req->Length = cpu_to_le32(io_parms->length);
2426 req->Offset = cpu_to_le64(io_parms->offset);
2427
2428 if (request_type & CHAINED_REQUEST) {
2429 if (!(request_type & END_OF_CHAIN)) {
b8f57ee8
PS		 2430 /* next 8-byte aligned request */
2431 *total_len = DIV_ROUND_UP(*total_len, 8) * 8;
2432 shdr->NextCommand = cpu_to_le32(*total_len);
09a4707e 2433 } else /* END_OF_CHAIN */
31473fc4 2434 shdr->NextCommand = 0;
09a4707e 2435 if (request_type & RELATED_REQUEST) {
31473fc4 2436 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
09a4707e
PS		 2437 /*
2438 * Related requests use info from previous read request
2439 * in chain.
2440 */
31473fc4
PS		 2441 shdr->SessionId = 0xFFFFFFFF;
2442 shdr->TreeId = 0xFFFFFFFF;
09a4707e
PS		 2443 req->PersistentFileId = 0xFFFFFFFF;
2444 req->VolatileFileId = 0xFFFFFFFF;
2445 }
2446 }
2447 if (remaining_bytes > io_parms->length)
2448 req->RemainingBytes = cpu_to_le32(remaining_bytes);
2449 else
2450 req->RemainingBytes = 0;
2451
738f9de5 2452 *buf = req;
09a4707e
PS		 2453 return rc;
2454}
2455
2456static void
2457smb2_readv_callback(struct mid_q_entry *mid)
2458{
2459 struct cifs_readdata *rdata = mid->callback_data;
2460 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
2461 struct TCP_Server_Info *server = tcon->ses->server;
738f9de5
PS		 2462 struct smb2_sync_hdr *shdr =
2463 (struct smb2_sync_hdr *)rdata->iov[1].iov_base;
09a4707e 2464 unsigned int credits_received = 1;
738f9de5
PS		 2465 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2466 .rq_nvec = 2,
8321fec4
JL		 2467 .rq_pages = rdata->pages,
2468 .rq_npages = rdata->nr_pages,
2469 .rq_pagesz = rdata->pagesz,
2470 .rq_tailsz = rdata->tailsz };
09a4707e 2471
f96637be
JP		 2472 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2473 __func__, mid->mid, mid->mid_state, rdata->result,
2474 rdata->bytes);
09a4707e
PS		 2475
2476 switch (mid->mid_state) {
2477 case MID_RESPONSE_RECEIVED:
31473fc4 2478 credits_received = le16_to_cpu(shdr->CreditRequest);
09a4707e 2479 /* result already set, check signature */
4326ed2f 2480 if (server->sign && !mid->decrypted) {
3c1bf7e4
PS		 2481 int rc;
2482
0b688cfc 2483 rc = smb2_verify_signature(&rqst, server);
3c1bf7e4 2484 if (rc)
f96637be
JP		 2485 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
2486 rc);
3c1bf7e4 2487 }
09a4707e 2488 /* FIXME: should this be counted toward the initiating task? */
34a54d61
PS		 2489 task_io_account_read(rdata->got_bytes);
2490 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 2491 break;
2492 case MID_REQUEST_SUBMITTED:
2493 case MID_RETRY_NEEDED:
2494 rdata->result = -EAGAIN;
d913ed17
PS		 2495 if (server->sign && rdata->got_bytes)
2496 /* reset bytes number since we can not check a sign */
2497 rdata->got_bytes = 0;
2498 /* FIXME: should this be counted toward the initiating task? */
2499 task_io_account_read(rdata->got_bytes);
2500 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 2501 break;
2502 default:
2503 if (rdata->result != -ENODATA)
2504 rdata->result = -EIO;
2505 }
2506
2507 if (rdata->result)
2508 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
2509
2510 queue_work(cifsiod_wq, &rdata->work);
2511 DeleteMidQEntry(mid);
2512 add_credits(server, credits_received, 0);
2513}
2514
738f9de5 2515/* smb2_async_readv - send an async read, and set up mid to handle result */
09a4707e
PS		 2516int
2517smb2_async_readv(struct cifs_readdata *rdata)
2518{
bed9da02 2519 int rc, flags = 0;
31473fc4
PS		 2520 char *buf;
2521 struct smb2_sync_hdr *shdr;
09a4707e 2522 struct cifs_io_parms io_parms;
738f9de5
PS		 2523 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2524 .rq_nvec = 2 };
bed9da02 2525 struct TCP_Server_Info *server;
738f9de5 2526 unsigned int total_len;
b8f57ee8 2527 __be32 req_len;
09a4707e 2528
f96637be
JP		 2529 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
2530 __func__, rdata->offset, rdata->bytes);
09a4707e
PS		 2531
2532 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
2533 io_parms.offset = rdata->offset;
2534 io_parms.length = rdata->bytes;
2535 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
2536 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
2537 io_parms.pid = rdata->pid;
bed9da02
PS		 2538
2539 server = io_parms.tcon->ses->server;
2540
738f9de5 2541 rc = smb2_new_read_req((void **) &buf, &total_len, &io_parms, 0, 0);
bed9da02
PS		 2542 if (rc) {
2543 if (rc == -EAGAIN && rdata->credits) {
2544 /* credits was reset by reconnect */
2545 rdata->credits = 0;
2546 /* reduce in_flight value since we won't send the req */
2547 spin_lock(&server->req_lock);
2548 server->in_flight--;
2549 spin_unlock(&server->req_lock);
2550 }
09a4707e 2551 return rc;
bed9da02 2552 }
09a4707e 2553
7fb8986e
PS		 2554 if (encryption_required(io_parms.tcon))
2555 flags |= CIFS_TRANSFORM_REQ;
2556
b8f57ee8
PS		 2557 req_len = cpu_to_be32(total_len);
2558
2559 rdata->iov[0].iov_base = &req_len;
2560 rdata->iov[0].iov_len = sizeof(__be32);
2561 rdata->iov[1].iov_base = buf;
2562 rdata->iov[1].iov_len = total_len;
2563
2564 shdr = (struct smb2_sync_hdr *)buf;
09a4707e 2565
bed9da02 2566 if (rdata->credits) {
31473fc4 2567 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
bed9da02 2568 SMB2_MAX_BUFFER_SIZE));
31473fc4 2569 shdr->CreditRequest = shdr->CreditCharge;
bed9da02
PS		 2570 spin_lock(&server->req_lock);
2571 server->credits += rdata->credits -
31473fc4 2572 le16_to_cpu(shdr->CreditCharge);
bed9da02
PS		 2573 spin_unlock(&server->req_lock);
2574 wake_up(&server->request_q);
7fb8986e 2575 flags |= CIFS_HAS_CREDITS;
bed9da02
PS		 2576 }
2577
09a4707e 2578 kref_get(&rdata->refcount);
fec344e3 2579 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
09a4707e 2580 cifs_readv_receive, smb2_readv_callback,
4326ed2f 2581 smb3_handle_read_data, rdata, flags);
e5d04887 2582 if (rc) {
09a4707e 2583 kref_put(&rdata->refcount, cifs_readdata_release);
e5d04887
PS		 2584 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
2585 }
09a4707e
PS		 2586
2587 cifs_small_buf_release(buf);
2588 return rc;
2589}
33319141 2590
d8e05039
PS		 2591int
2592SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
2593 unsigned int *nbytes, char **buf, int *buf_type)
2594{
2595 int resp_buftype, rc = -EACCES;
b8f57ee8 2596 struct smb2_read_plain_req *req = NULL;
d8e05039 2597 struct smb2_read_rsp *rsp = NULL;
31473fc4 2598 struct smb2_sync_hdr *shdr;
b8f57ee8 2599 struct kvec iov[2];
da502f7d 2600 struct kvec rsp_iov;
738f9de5 2601 unsigned int total_len;
b8f57ee8
PS		 2602 __be32 req_len;
2603 struct smb_rqst rqst = { .rq_iov = iov,
2604 .rq_nvec = 2 };
7fb8986e
PS		 2605 int flags = CIFS_LOG_ERROR;
2606 struct cifs_ses *ses = io_parms->tcon->ses;
d8e05039
PS		 2607
2608 *nbytes = 0;
738f9de5 2609 rc = smb2_new_read_req((void **)&req, &total_len, io_parms, 0, 0);
d8e05039
PS		 2610 if (rc)
2611 return rc;
2612
7fb8986e
PS		 2613 if (encryption_required(io_parms->tcon))
2614 flags |= CIFS_TRANSFORM_REQ;
2615
b8f57ee8 2616 req_len = cpu_to_be32(total_len);
738f9de5 2617
b8f57ee8
PS		 2618 iov[0].iov_base = &req_len;
2619 iov[0].iov_len = sizeof(__be32);
2620 iov[1].iov_base = req;
2621 iov[1].iov_len = total_len;
2622
7fb8986e 2623 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
b8f57ee8 2624 cifs_small_buf_release(req);
d8e05039 2625
da502f7d 2626 rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
31473fc4 2627 shdr = get_sync_hdr(rsp);
d8e05039 2628
31473fc4 2629 if (shdr->Status == STATUS_END_OF_FILE) {
da502f7d 2630 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
d8e05039
PS		 2631 return 0;
2632 }
2633
2634 if (rc) {
2635 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
f96637be 2636 cifs_dbg(VFS, "Send error in read = %d\n", rc);
d8e05039
PS		 2637 } else {
2638 *nbytes = le32_to_cpu(rsp->DataLength);
2639 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
2640 (*nbytes > io_parms->length)) {
f96637be
JP		 2641 cifs_dbg(FYI, "bad length %d for count %d\n",
2642 *nbytes, io_parms->length);
d8e05039
PS		 2643 rc = -EIO;
2644 *nbytes = 0;
2645 }
2646 }
2647
2648 if (*buf) {
31473fc4 2649 memcpy(*buf, (char *)shdr + rsp->DataOffset, *nbytes);
da502f7d 2650 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
d8e05039 2651 } else if (resp_buftype != CIFS_NO_BUFFER) {
da502f7d 2652 *buf = rsp_iov.iov_base;
d8e05039
PS		 2653 if (resp_buftype == CIFS_SMALL_BUFFER)
2654 *buf_type = CIFS_SMALL_BUFFER;
2655 else if (resp_buftype == CIFS_LARGE_BUFFER)
2656 *buf_type = CIFS_LARGE_BUFFER;
2657 }
2658 return rc;
2659}
2660
33319141
PS		 2661/*
2662 * Check the mid_state and signature on received buffer (if any), and queue the
2663 * workqueue completion task.
2664 */
2665static void
2666smb2_writev_callback(struct mid_q_entry *mid)
2667{
2668 struct cifs_writedata *wdata = mid->callback_data;
2669 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
2670 unsigned int written;
2671 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
2672 unsigned int credits_received = 1;
2673
2674 switch (mid->mid_state) {
2675 case MID_RESPONSE_RECEIVED:
31473fc4 2676 credits_received = le16_to_cpu(rsp->hdr.sync_hdr.CreditRequest);
33319141
PS		 2677 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
2678 if (wdata->result != 0)
2679 break;
2680
2681 written = le32_to_cpu(rsp->DataLength);
2682 /*
2683 * Mask off high 16 bits when bytes written as returned
2684 * by the server is greater than bytes requested by the
2685 * client. OS/2 servers are known to set incorrect
2686 * CountHigh values.
2687 */
2688 if (written > wdata->bytes)
2689 written &= 0xFFFF;
2690
2691 if (written < wdata->bytes)
2692 wdata->result = -ENOSPC;
2693 else
2694 wdata->bytes = written;
2695 break;
2696 case MID_REQUEST_SUBMITTED:
2697 case MID_RETRY_NEEDED:
2698 wdata->result = -EAGAIN;
2699 break;
2700 default:
2701 wdata->result = -EIO;
2702 break;
2703 }
2704
2705 if (wdata->result)
2706 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2707
2708 queue_work(cifsiod_wq, &wdata->work);
2709 DeleteMidQEntry(mid);
2710 add_credits(tcon->ses->server, credits_received, 0);
2711}
2712
2713/* smb2_async_writev - send an async write, and set up mid to handle result */
2714int
4a5c80d7
SF		 2715smb2_async_writev(struct cifs_writedata *wdata,
2716 void (*release)(struct kref *kref))
33319141 2717{
cb7e9eab 2718 int rc = -EACCES, flags = 0;
33319141 2719 struct smb2_write_req *req = NULL;
31473fc4 2720 struct smb2_sync_hdr *shdr;
33319141 2721 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
cb7e9eab 2722 struct TCP_Server_Info *server = tcon->ses->server;
738f9de5
PS		 2723 struct kvec iov[2];
2724 struct smb_rqst rqst = { };
33319141
PS		 2725
2726 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
cb7e9eab
PS		 2727 if (rc) {
2728 if (rc == -EAGAIN && wdata->credits) {
2729 /* credits was reset by reconnect */
2730 wdata->credits = 0;
2731 /* reduce in_flight value since we won't send the req */
2732 spin_lock(&server->req_lock);
2733 server->in_flight--;
2734 spin_unlock(&server->req_lock);
2735 }
33319141 2736 goto async_writev_out;
cb7e9eab 2737 }
33319141 2738
7fb8986e
PS		 2739 if (encryption_required(tcon))
2740 flags |= CIFS_TRANSFORM_REQ;
2741
31473fc4
PS		 2742 shdr = get_sync_hdr(req);
2743 shdr->ProcessId = cpu_to_le32(wdata->cfile->pid);
33319141
PS		 2744
2745 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
2746 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
2747 req->WriteChannelInfoOffset = 0;
2748 req->WriteChannelInfoLength = 0;
2749 req->Channel = 0;
2750 req->Offset = cpu_to_le64(wdata->offset);
2751 /* 4 for rfc1002 length field */
2752 req->DataOffset = cpu_to_le16(
2753 offsetof(struct smb2_write_req, Buffer) - 4);
2754 req->RemainingBytes = 0;
2755
2756 /* 4 for rfc1002 length field and 1 for Buffer */
738f9de5
PS		 2757 iov[0].iov_len = 4;
2758 iov[0].iov_base = req;
2759 iov[1].iov_len = get_rfc1002_length(req) - 1;
2760 iov[1].iov_base = (char *)req + 4;
33319141 2761
738f9de5
PS		 2762 rqst.rq_iov = iov;
2763 rqst.rq_nvec = 2;
eddb079d
JL		 2764 rqst.rq_pages = wdata->pages;
2765 rqst.rq_npages = wdata->nr_pages;
2766 rqst.rq_pagesz = wdata->pagesz;
2767 rqst.rq_tailsz = wdata->tailsz;
33319141 2768
f96637be
JP		 2769 cifs_dbg(FYI, "async write at %llu %u bytes\n",
2770 wdata->offset, wdata->bytes);
33319141
PS		 2771
2772 req->Length = cpu_to_le32(wdata->bytes);
2773
2774 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
2775
cb7e9eab 2776 if (wdata->credits) {
31473fc4 2777 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
cb7e9eab 2778 SMB2_MAX_BUFFER_SIZE));
31473fc4 2779 shdr->CreditRequest = shdr->CreditCharge;
cb7e9eab
PS		 2780 spin_lock(&server->req_lock);
2781 server->credits += wdata->credits -
31473fc4 2782 le16_to_cpu(shdr->CreditCharge);
cb7e9eab
PS		 2783 spin_unlock(&server->req_lock);
2784 wake_up(&server->request_q);
7fb8986e 2785 flags |= CIFS_HAS_CREDITS;
cb7e9eab
PS		 2786 }
2787
33319141 2788 kref_get(&wdata->refcount);
9b7c18a2
PS		 2789 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
2790 wdata, flags);
33319141 2791
e5d04887 2792 if (rc) {
4a5c80d7 2793 kref_put(&wdata->refcount, release);
e5d04887
PS		 2794 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2795 }
33319141 2796
33319141
PS		 2797async_writev_out:
2798 cifs_small_buf_release(req);
33319141
PS		 2799 return rc;
2800}
009d3443
PS		 2801
2802/*
2803 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2804 * The length field from io_parms must be at least 1 and indicates a number of
2805 * elements with data to write that begins with position 1 in iov array. All
2806 * data length is specified by count.
2807 */
2808int
2809SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
2810 unsigned int *nbytes, struct kvec *iov, int n_vec)
2811{
2812 int rc = 0;
2813 struct smb2_write_req *req = NULL;
2814 struct smb2_write_rsp *rsp = NULL;
2815 int resp_buftype;
da502f7d 2816 struct kvec rsp_iov;
7fb8986e 2817 int flags = 0;
da502f7d 2818
009d3443
PS		 2819 *nbytes = 0;
2820
2821 if (n_vec < 1)
2822 return rc;
2823
2824 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
2825 if (rc)
2826 return rc;
2827
2828 if (io_parms->tcon->ses->server == NULL)
2829 return -ECONNABORTED;
2830
7fb8986e
PS		 2831 if (encryption_required(io_parms->tcon))
2832 flags |= CIFS_TRANSFORM_REQ;
2833
31473fc4 2834 req->hdr.sync_hdr.ProcessId = cpu_to_le32(io_parms->pid);
009d3443
PS		 2835
2836 req->PersistentFileId = io_parms->persistent_fid;
2837 req->VolatileFileId = io_parms->volatile_fid;
2838 req->WriteChannelInfoOffset = 0;
2839 req->WriteChannelInfoLength = 0;
2840 req->Channel = 0;
2841 req->Length = cpu_to_le32(io_parms->length);
2842 req->Offset = cpu_to_le64(io_parms->offset);
2843 /* 4 for rfc1002 length field */
2844 req->DataOffset = cpu_to_le16(
2845 offsetof(struct smb2_write_req, Buffer) - 4);
2846 req->RemainingBytes = 0;
2847
2848 iov[0].iov_base = (char *)req;
2849 /* 4 for rfc1002 length field and 1 for Buffer */
2850 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2851
2852 /* length of entire message including data to be written */
2853 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
2854
2855 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
7fb8986e 2856 &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2857 cifs_small_buf_release(req);
2858 rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
009d3443
PS		 2859
2860 if (rc) {
2861 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
f96637be 2862 cifs_dbg(VFS, "Send error in write = %d\n", rc);
e5d04887 2863 } else
009d3443 2864 *nbytes = le32_to_cpu(rsp->DataLength);
e5d04887
PS		 2865
2866 free_rsp_buf(resp_buftype, rsp);
009d3443
PS		 2867 return rc;
2868}
35143eb5 2869
d324f08d
PS		 2870static unsigned int
2871num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
2872{
2873 int len;
2874 unsigned int entrycount = 0;
2875 unsigned int next_offset = 0;
2876 FILE_DIRECTORY_INFO *entryptr;
2877
2878 if (bufstart == NULL)
2879 return 0;
2880
2881 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
2882
2883 while (1) {
2884 entryptr = (FILE_DIRECTORY_INFO *)
2885 ((char *)entryptr + next_offset);
2886
2887 if ((char *)entryptr + size > end_of_buf) {
f96637be 2888 cifs_dbg(VFS, "malformed search entry would overflow\n");
d324f08d
PS		 2889 break;
2890 }
2891
2892 len = le32_to_cpu(entryptr->FileNameLength);
2893 if ((char *)entryptr + len + size > end_of_buf) {
f96637be
JP		 2894 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
2895 end_of_buf);
d324f08d
PS		 2896 break;
2897 }
2898
2899 *lastentry = (char *)entryptr;
2900 entrycount++;
2901
2902 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
2903 if (!next_offset)
2904 break;
2905 }
2906
2907 return entrycount;
2908}
2909
2910/*
2911 * Readdir/FindFirst
2912 */
2913int
2914SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
2915 u64 persistent_fid, u64 volatile_fid, int index,
2916 struct cifs_search_info *srch_inf)
2917{
2918 struct smb2_query_directory_req *req;
2919 struct smb2_query_directory_rsp *rsp = NULL;
2920 struct kvec iov[2];
da502f7d 2921 struct kvec rsp_iov;
d324f08d
PS		 2922 int rc = 0;
2923 int len;
75fdfc84 2924 int resp_buftype = CIFS_NO_BUFFER;
d324f08d
PS		 2925 unsigned char *bufptr;
2926 struct TCP_Server_Info *server;
2927 struct cifs_ses *ses = tcon->ses;
2928 __le16 asteriks = cpu_to_le16('*');
2929 char *end_of_smb;
2930 unsigned int output_size = CIFSMaxBufSize;
2931 size_t info_buf_size;
7fb8986e 2932 int flags = 0;
d324f08d
PS		 2933
2934 if (ses && (ses->server))
2935 server = ses->server;
2936 else
2937 return -EIO;
2938
2939 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
2940 if (rc)
2941 return rc;
2942
7fb8986e
PS		 2943 if (encryption_required(tcon))
2944 flags |= CIFS_TRANSFORM_REQ;
2945
d324f08d
PS		 2946 switch (srch_inf->info_level) {
2947 case SMB_FIND_FILE_DIRECTORY_INFO:
2948 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
2949 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
2950 break;
2951 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
2952 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
2953 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
2954 break;
2955 default:
f96637be
JP		 2956 cifs_dbg(VFS, "info level %u isn't supported\n",
2957 srch_inf->info_level);
d324f08d
PS		 2958 rc = -EINVAL;
2959 goto qdir_exit;
2960 }
2961
2962 req->FileIndex = cpu_to_le32(index);
2963 req->PersistentFileId = persistent_fid;
2964 req->VolatileFileId = volatile_fid;
2965
2966 len = 0x2;
2967 bufptr = req->Buffer;
2968 memcpy(bufptr, &asteriks, len);
2969
2970 req->FileNameOffset =
2971 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
2972 req->FileNameLength = cpu_to_le16(len);
2973 /*
2974 * BB could be 30 bytes or so longer if we used SMB2 specific
2975 * buffer lengths, but this is safe and close enough.
2976 */
2977 output_size = min_t(unsigned int, output_size, server->maxBuf);
2978 output_size = min_t(unsigned int, output_size, 2 << 15);
2979 req->OutputBufferLength = cpu_to_le32(output_size);
2980
2981 iov[0].iov_base = (char *)req;
2982 /* 4 for RFC1001 length and 1 for Buffer */
2983 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2984
2985 iov[1].iov_base = (char *)(req->Buffer);
2986 iov[1].iov_len = len;
2987
2988 inc_rfc1001_len(req, len - 1 /* Buffer */);
2989
7fb8986e 2990 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2991 cifs_small_buf_release(req);
2992 rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
e5d04887 2993
d324f08d 2994 if (rc) {
31473fc4
PS		 2995 if (rc == -ENODATA &&
2996 rsp->hdr.sync_hdr.Status == STATUS_NO_MORE_FILES) {
52755808
PS		 2997 srch_inf->endOfSearch = true;
2998 rc = 0;
2999 }
d324f08d
PS		 3000 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
3001 goto qdir_exit;
3002 }
d324f08d
PS		 3003
3004 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
3005 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
3006 info_buf_size);
3007 if (rc)
3008 goto qdir_exit;
3009
3010 srch_inf->unicode = true;
3011
3012 if (srch_inf->ntwrk_buf_start) {
3013 if (srch_inf->smallBuf)
3014 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
3015 else
3016 cifs_buf_release(srch_inf->ntwrk_buf_start);
3017 }
3018 srch_inf->ntwrk_buf_start = (char *)rsp;
3019 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
3020 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
3021 /* 4 for rfc1002 length field */
3022 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
3023 srch_inf->entries_in_buffer =
3024 num_entries(srch_inf->srch_entries_start, end_of_smb,
3025 &srch_inf->last_entry, info_buf_size);
3026 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
f96637be
JP		 3027 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
3028 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
3029 srch_inf->srch_entries_start, srch_inf->last_entry);
d324f08d
PS		 3030 if (resp_buftype == CIFS_LARGE_BUFFER)
3031 srch_inf->smallBuf = false;
3032 else if (resp_buftype == CIFS_SMALL_BUFFER)
3033 srch_inf->smallBuf = true;
3034 else
f96637be 3035 cifs_dbg(VFS, "illegal search buffer type\n");
d324f08d 3036
d324f08d
PS		 3037 return rc;
3038
3039qdir_exit:
3040 free_rsp_buf(resp_buftype, rsp);
3041 return rc;
3042}
3043
35143eb5
PS		 3044static int
3045send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
dac95340
SP		 3046 u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
3047 u8 info_type, u32 additional_info, unsigned int num,
3048 void **data, unsigned int *size)
35143eb5
PS		 3049{
3050 struct smb2_set_info_req *req;
3051 struct smb2_set_info_rsp *rsp = NULL;
3052 struct kvec *iov;
da502f7d 3053 struct kvec rsp_iov;
35143eb5
PS		 3054 int rc = 0;
3055 int resp_buftype;
3056 unsigned int i;
35143eb5 3057 struct cifs_ses *ses = tcon->ses;
7fb8986e 3058 int flags = 0;
35143eb5 3059
68a6afa7 3060 if (!ses || !(ses->server))
35143eb5
PS		 3061 return -EIO;
3062
3063 if (!num)
3064 return -EINVAL;
3065
3066 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
3067 if (!iov)
3068 return -ENOMEM;
3069
3070 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
3071 if (rc) {
3072 kfree(iov);
3073 return rc;
3074 }
3075
7fb8986e
PS		 3076 if (encryption_required(tcon))
3077 flags |= CIFS_TRANSFORM_REQ;
3078
31473fc4 3079 req->hdr.sync_hdr.ProcessId = cpu_to_le32(pid);
c839ff24 3080
dac95340 3081 req->InfoType = info_type;
35143eb5
PS		 3082 req->FileInfoClass = info_class;
3083 req->PersistentFileId = persistent_fid;
3084 req->VolatileFileId = volatile_fid;
dac95340 3085 req->AdditionalInformation = cpu_to_le32(additional_info);
35143eb5
PS		 3086
3087 /* 4 for RFC1001 length and 1 for Buffer */
3088 req->BufferOffset =
3089 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
3090 req->BufferLength = cpu_to_le32(*size);
3091
3092 inc_rfc1001_len(req, *size - 1 /* Buffer */);
3093
3094 memcpy(req->Buffer, *data, *size);
3095
3096 iov[0].iov_base = (char *)req;
3097 /* 4 for RFC1001 length */
3098 iov[0].iov_len = get_rfc1002_length(req) + 4;
3099
3100 for (i = 1; i < num; i++) {
3101 inc_rfc1001_len(req, size[i]);
3102 le32_add_cpu(&req->BufferLength, size[i]);
3103 iov[i].iov_base = (char *)data[i];
3104 iov[i].iov_len = size[i];
3105 }
3106
7fb8986e 3107 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 3108 cifs_small_buf_release(req);
3109 rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
35143eb5 3110
7d3fb24b 3111 if (rc != 0)
35143eb5 3112 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
7d3fb24b 3113
35143eb5
PS		 3114 free_rsp_buf(resp_buftype, rsp);
3115 kfree(iov);
3116 return rc;
3117}
3118
3119int
3120SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
3121 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3122{
3123 struct smb2_file_rename_info info;
3124 void **data;
3125 unsigned int size[2];
3126 int rc;
3127 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3128
3129 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
3130 if (!data)
3131 return -ENOMEM;
3132
3133 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
3134 /* 0 = fail if target already exists */
3135 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3136 info.FileNameLength = cpu_to_le32(len);
3137
3138 data[0] = &info;
3139 size[0] = sizeof(struct smb2_file_rename_info);
3140
3141 data[1] = target_file;
3142 size[1] = len + 2 /* null */;
3143
3144 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3145 current->tgid, FILE_RENAME_INFORMATION, SMB2_O_INFO_FILE,
3146 0, 2, data, size);
35143eb5
PS		 3147 kfree(data);
3148 return rc;
3149}
568798cc 3150
897fba11
SF		 3151int
3152SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
3153 u64 persistent_fid, u64 volatile_fid)
3154{
3155 __u8 delete_pending = 1;
3156 void *data;
3157 unsigned int size;
3158
3159 data = &delete_pending;
3160 size = 1; /* sizeof __u8 */
3161
3162 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3163 current->tgid, FILE_DISPOSITION_INFORMATION, SMB2_O_INFO_FILE,
3164 0, 1, &data, &size);
897fba11
SF		 3165}
3166
568798cc
PS		 3167int
3168SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
3169 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3170{
3171 struct smb2_file_link_info info;
3172 void **data;
3173 unsigned int size[2];
3174 int rc;
3175 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3176
3177 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
3178 if (!data)
3179 return -ENOMEM;
3180
3181 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
3182 /* 0 = fail if link already exists */
3183 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3184 info.FileNameLength = cpu_to_le32(len);
3185
3186 data[0] = &info;
3187 size[0] = sizeof(struct smb2_file_link_info);
3188
3189 data[1] = target_file;
3190 size[1] = len + 2 /* null */;
3191
3192 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3193 current->tgid, FILE_LINK_INFORMATION, SMB2_O_INFO_FILE,
3194 0, 2, data, size);
568798cc
PS		 3195 kfree(data);
3196 return rc;
3197}
c839ff24
PS		 3198
3199int
3200SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
f29ebb47 3201 u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc)
c839ff24
PS		 3202{
3203 struct smb2_file_eof_info info;
3204 void *data;
3205 unsigned int size;
3206
3207 info.EndOfFile = *eof;
3208
3209 data = &info;
3210 size = sizeof(struct smb2_file_eof_info);
3211
f29ebb47
SF		 3212 if (is_falloc)
3213 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3214 pid, FILE_ALLOCATION_INFORMATION, SMB2_O_INFO_FILE,
3215 0, 1, &data, &size);
f29ebb47
SF		 3216 else
3217 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3218 pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE,
3219 0, 1, &data, &size);
c839ff24 3220}
1feeaac7
PS		 3221
3222int
3223SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
3224 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
3225{
3226 unsigned int size;
3227 size = sizeof(FILE_BASIC_INFO);
3228 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
dac95340
SP		 3229 current->tgid, FILE_BASIC_INFORMATION, SMB2_O_INFO_FILE,
3230 0, 1, (void **)&buf, &size);
3231}
3232
3233int
3234SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
3235 u64 persistent_fid, u64 volatile_fid,
3236 struct cifs_ntsd *pnntsd, int pacllen, int aclflag)
3237{
3238 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3239 current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag,
3240 1, (void **)&pnntsd, &pacllen);
1feeaac7 3241}
983c88a4
PS		 3242
3243int
3244SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
3245 const u64 persistent_fid, const u64 volatile_fid,
3246 __u8 oplock_level)
3247{
3248 int rc;
3249 struct smb2_oplock_break *req = NULL;
7fb8986e 3250 int flags = CIFS_OBREAK_OP;
983c88a4 3251
f96637be 3252 cifs_dbg(FYI, "SMB2_oplock_break\n");
983c88a4 3253 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
983c88a4
PS		 3254 if (rc)
3255 return rc;
3256
7fb8986e
PS		 3257 if (encryption_required(tcon))
3258 flags |= CIFS_TRANSFORM_REQ;
3259
983c88a4
PS		 3260 req->VolatileFid = volatile_fid;
3261 req->PersistentFid = persistent_fid;
3262 req->OplockLevel = oplock_level;
31473fc4 3263 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
983c88a4 3264
7fb8986e 3265 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, flags);
da502f7d 3266 cifs_small_buf_release(req);
983c88a4
PS		 3267
3268 if (rc) {
3269 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 3270 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
983c88a4
PS		 3271 }
3272
3273 return rc;
3274}
6fc05c25
PS		 3275
3276static void
3277copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
3278 struct kstatfs *kst)
3279{
3280 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
3281 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
3282 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
42bec214
SP		 3283 kst->f_bfree = kst->f_bavail =
3284 le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
6fc05c25
PS		 3285 return;
3286}
3287
3288static int
3289build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
3290 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
3291{
3292 int rc;
3293 struct smb2_query_info_req *req;
3294
f96637be 3295 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
6fc05c25
PS		 3296
3297 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
3298 return -EIO;
3299
3300 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
3301 if (rc)
3302 return rc;
3303
3304 req->InfoType = SMB2_O_INFO_FILESYSTEM;
3305 req->FileInfoClass = level;
3306 req->PersistentFileId = persistent_fid;
3307 req->VolatileFileId = volatile_fid;
3308 /* 4 for rfc1002 length field and 1 for pad */
3309 req->InputBufferOffset =
3310 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
3311 req->OutputBufferLength = cpu_to_le32(
3312 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
3313
3314 iov->iov_base = (char *)req;
3315 /* 4 for rfc1002 length field */
3316 iov->iov_len = get_rfc1002_length(req) + 4;
3317 return 0;
3318}
3319
3320int
3321SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
3322 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
3323{
3324 struct smb2_query_info_rsp *rsp = NULL;
3325 struct kvec iov;
da502f7d 3326 struct kvec rsp_iov;
6fc05c25
PS		 3327 int rc = 0;
3328 int resp_buftype;
3329 struct cifs_ses *ses = tcon->ses;
3330 struct smb2_fs_full_size_info *info = NULL;
7fb8986e 3331 int flags = 0;
6fc05c25
PS		 3332
3333 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
3334 sizeof(struct smb2_fs_full_size_info),
3335 persistent_fid, volatile_fid);
3336 if (rc)
3337 return rc;
3338
7fb8986e
PS		 3339 if (encryption_required(tcon))
3340 flags |= CIFS_TRANSFORM_REQ;
3341
3342 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d 3343 cifs_small_buf_release(iov.iov_base);
6fc05c25
PS		 3344 if (rc) {
3345 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
34f62640 3346 goto qfsinf_exit;
6fc05c25 3347 }
da502f7d 3348 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
6fc05c25
PS		 3349
3350 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
3351 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
3352 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
3353 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
3354 sizeof(struct smb2_fs_full_size_info));
3355 if (!rc)
3356 copy_fs_info_to_kstatfs(info, fsdata);
3357
34f62640 3358qfsinf_exit:
da502f7d 3359 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
34f62640
SF		 3360 return rc;
3361}
3362
3363int
3364SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2167114c 3365 u64 persistent_fid, u64 volatile_fid, int level)
34f62640
SF		 3366{
3367 struct smb2_query_info_rsp *rsp = NULL;
3368 struct kvec iov;
da502f7d 3369 struct kvec rsp_iov;
34f62640 3370 int rc = 0;
2167114c 3371 int resp_buftype, max_len, min_len;
34f62640
SF		 3372 struct cifs_ses *ses = tcon->ses;
3373 unsigned int rsp_len, offset;
7fb8986e 3374 int flags = 0;
34f62640 3375
2167114c
SF		 3376 if (level == FS_DEVICE_INFORMATION) {
3377 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3378 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3379 } else if (level == FS_ATTRIBUTE_INFORMATION) {
3380 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
3381 min_len = MIN_FS_ATTR_INFO_SIZE;
af6a12ea
SF		 3382 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
3383 max_len = sizeof(struct smb3_fs_ss_info);
3384 min_len = sizeof(struct smb3_fs_ss_info);
2167114c 3385 } else {
af6a12ea 3386 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2167114c
SF		 3387 return -EINVAL;
3388 }
3389
3390 rc = build_qfs_info_req(&iov, tcon, level, max_len,
34f62640
SF		 3391 persistent_fid, volatile_fid);
3392 if (rc)
3393 return rc;
3394
7fb8986e
PS		 3395 if (encryption_required(tcon))
3396 flags |= CIFS_TRANSFORM_REQ;
3397
3398 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d 3399 cifs_small_buf_release(iov.iov_base);
34f62640
SF		 3400 if (rc) {
3401 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
3402 goto qfsattr_exit;
3403 }
da502f7d 3404 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
34f62640
SF		 3405
3406 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
3407 offset = le16_to_cpu(rsp->OutputBufferOffset);
2167114c
SF		 3408 rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
3409 if (rc)
3410 goto qfsattr_exit;
3411
3412 if (level == FS_ATTRIBUTE_INFORMATION)
34f62640
SF		 3413 memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
3414 + (char *)&rsp->hdr, min_t(unsigned int,
2167114c
SF		 3415 rsp_len, max_len));
3416 else if (level == FS_DEVICE_INFORMATION)
3417 memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
3418 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
af6a12ea
SF		 3419 else if (level == FS_SECTOR_SIZE_INFORMATION) {
3420 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
3421 (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
3422 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
3423 tcon->perf_sector_size =
3424 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
3425 }
34f62640
SF		 3426
3427qfsattr_exit:
da502f7d 3428 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
6fc05c25
PS		 3429 return rc;
3430}
f7ba7fe6
PS		 3431
3432int
3433smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
3434 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3435 const __u32 num_lock, struct smb2_lock_element *buf)
3436{
3437 int rc = 0;
3438 struct smb2_lock_req *req = NULL;
3439 struct kvec iov[2];
da502f7d 3440 struct kvec rsp_iov;
f7ba7fe6
PS		 3441 int resp_buf_type;
3442 unsigned int count;
7fb8986e 3443 int flags = CIFS_NO_RESP;
f7ba7fe6 3444
f96637be 3445 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
f7ba7fe6
PS		 3446
3447 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
3448 if (rc)
3449 return rc;
3450
7fb8986e
PS		 3451 if (encryption_required(tcon))
3452 flags |= CIFS_TRANSFORM_REQ;
3453
31473fc4 3454 req->hdr.sync_hdr.ProcessId = cpu_to_le32(pid);
f7ba7fe6
PS		 3455 req->LockCount = cpu_to_le16(num_lock);
3456
3457 req->PersistentFileId = persist_fid;
3458 req->VolatileFileId = volatile_fid;
3459
3460 count = num_lock * sizeof(struct smb2_lock_element);
3461 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
3462
3463 iov[0].iov_base = (char *)req;
3464 /* 4 for rfc1002 length field and count for all locks */
3465 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
3466 iov[1].iov_base = (char *)buf;
3467 iov[1].iov_len = count;
3468
3469 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
7fb8986e 3470 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, flags,
da502f7d
PS		 3471 &rsp_iov);
3472 cifs_small_buf_release(req);
f7ba7fe6 3473 if (rc) {
f96637be 3474 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
f7ba7fe6
PS		 3475 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
3476 }
3477
3478 return rc;
3479}
3480
3481int
3482SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
3483 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3484 const __u64 length, const __u64 offset, const __u32 lock_flags,
3485 const bool wait)
3486{
3487 struct smb2_lock_element lock;
3488
3489 lock.Offset = cpu_to_le64(offset);
3490 lock.Length = cpu_to_le64(length);
3491 lock.Flags = cpu_to_le32(lock_flags);
3492 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
3493 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
3494
3495 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
3496}
0822f514
PS		 3497
3498int
3499SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
3500 __u8 *lease_key, const __le32 lease_state)
3501{
3502 int rc;
3503 struct smb2_lease_ack *req = NULL;
7fb8986e 3504 int flags = CIFS_OBREAK_OP;
0822f514 3505
f96637be 3506 cifs_dbg(FYI, "SMB2_lease_break\n");
0822f514 3507 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
0822f514
PS		 3508 if (rc)
3509 return rc;
3510
7fb8986e
PS		 3511 if (encryption_required(tcon))
3512 flags |= CIFS_TRANSFORM_REQ;
3513
31473fc4 3514 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
0822f514
PS		 3515 req->StructureSize = cpu_to_le16(36);
3516 inc_rfc1001_len(req, 12);
3517
3518 memcpy(req->LeaseKey, lease_key, 16);
3519 req->LeaseState = lease_state;
3520
7fb8986e 3521 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, flags);
da502f7d 3522 cifs_small_buf_release(req);
0822f514
PS		 3523
3524 if (rc) {
3525 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 3526 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
0822f514
PS		 3527 }
3528
3529 return rc;
3530}
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