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[SMB3] Fix sec=krb5 on smb3 mounts
[deliverable/linux.git] / fs / cifs / smb2pdu.c
CommitLineData
ec2e4523
PS		 1/*
2 * fs/cifs/smb2pdu.c
3 *
2b80d049 4 * Copyright (C) International Business Machines Corp., 2009, 2013
ec2e4523
PS		 5 * Etersoft, 2012
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
8 *
9 * Contains the routines for constructing the SMB2 PDUs themselves
10 *
11 * This library is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published
13 * by the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
15 *
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
19 * the GNU Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 */
25
26 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
27 /* Note that there are handle based routines which must be */
28 /* treated slightly differently for reconnection purposes since we never */
29 /* want to reuse a stale file handle and only the caller knows the file info */
30
31#include <linux/fs.h>
32#include <linux/kernel.h>
33#include <linux/vfs.h>
09a4707e 34#include <linux/task_io_accounting_ops.h>
ec2e4523 35#include <linux/uaccess.h>
33319141 36#include <linux/pagemap.h>
ec2e4523
PS		 37#include <linux/xattr.h>
38#include "smb2pdu.h"
39#include "cifsglob.h"
40#include "cifsacl.h"
41#include "cifsproto.h"
42#include "smb2proto.h"
43#include "cifs_unicode.h"
44#include "cifs_debug.h"
45#include "ntlmssp.h"
46#include "smb2status.h"
09a4707e 47#include "smb2glob.h"
d324f08d 48#include "cifspdu.h"
ceb1b0b9 49#include "cifs_spnego.h"
ec2e4523
PS		 50
51/*
52 * The following table defines the expected "StructureSize" of SMB2 requests
53 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
54 *
55 * Note that commands are defined in smb2pdu.h in le16 but the array below is
56 * indexed by command in host byte order.
57 */
58static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
59 /* SMB2_NEGOTIATE */ 36,
60 /* SMB2_SESSION_SETUP */ 25,
61 /* SMB2_LOGOFF */ 4,
62 /* SMB2_TREE_CONNECT */ 9,
63 /* SMB2_TREE_DISCONNECT */ 4,
64 /* SMB2_CREATE */ 57,
65 /* SMB2_CLOSE */ 24,
66 /* SMB2_FLUSH */ 24,
67 /* SMB2_READ */ 49,
68 /* SMB2_WRITE */ 49,
69 /* SMB2_LOCK */ 48,
70 /* SMB2_IOCTL */ 57,
71 /* SMB2_CANCEL */ 4,
72 /* SMB2_ECHO */ 4,
73 /* SMB2_QUERY_DIRECTORY */ 33,
74 /* SMB2_CHANGE_NOTIFY */ 32,
75 /* SMB2_QUERY_INFO */ 41,
76 /* SMB2_SET_INFO */ 33,
77 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
78};
79
80
81static void
82smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd /* command */ ,
83 const struct cifs_tcon *tcon)
84{
85 struct smb2_pdu *pdu = (struct smb2_pdu *)hdr;
86 char *temp = (char *)hdr;
87 /* lookup word count ie StructureSize from table */
88 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_cmd)];
89
90 /*
91 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
92 * largest operations (Create)
93 */
94 memset(temp, 0, 256);
95
96 /* Note this is only network field converted to big endian */
97 hdr->smb2_buf_length = cpu_to_be32(parmsize + sizeof(struct smb2_hdr)
98 - 4 /* RFC 1001 length field itself not counted */);
99
100 hdr->ProtocolId[0] = 0xFE;
101 hdr->ProtocolId[1] = 'S';
102 hdr->ProtocolId[2] = 'M';
103 hdr->ProtocolId[3] = 'B';
104 hdr->StructureSize = cpu_to_le16(64);
105 hdr->Command = smb2_cmd;
106 hdr->CreditRequest = cpu_to_le16(2); /* BB make this dynamic */
107 hdr->ProcessId = cpu_to_le32((__u16)current->tgid);
108
109 if (!tcon)
110 goto out;
111
2b80d049
SF		 112 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
113 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
1dc92c45 114 if ((tcon->ses) && (tcon->ses->server) &&
84ceeb96 115 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
2b80d049
SF		 116 hdr->CreditCharge = cpu_to_le16(1);
117 /* else CreditCharge MBZ */
118
ec2e4523
PS		 119 hdr->TreeId = tcon->tid;
120 /* Uid is not converted */
121 if (tcon->ses)
122 hdr->SessionId = tcon->ses->Suid;
f87ab88b
SF		 123
124 /*
125 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
126 * to pass the path on the Open SMB prefixed by \\server\share.
127 * Not sure when we would need to do the augmented path (if ever) and
128 * setting this flag breaks the SMB2 open operation since it is
129 * illegal to send an empty path name (without \\server\share prefix)
130 * when the DFS flag is set in the SMB open header. We could
131 * consider setting the flag on all operations other than open
132 * but it is safer to net set it for now.
133 */
134/* if (tcon->share_flags & SHI1005_FLAGS_DFS)
135 hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
136
38d77c50 137 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign)
3c1bf7e4 138 hdr->Flags |= SMB2_FLAGS_SIGNED;
ec2e4523
PS		 139out:
140 pdu->StructureSize2 = cpu_to_le16(parmsize);
141 return;
142}
143
144static int
145smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
146{
147 int rc = 0;
aa24d1e9
PS		 148 struct nls_table *nls_codepage;
149 struct cifs_ses *ses;
150 struct TCP_Server_Info *server;
151
152 /*
153 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
154 * check for tcp and smb session status done differently
155 * for those three - in the calling routine.
156 */
157 if (tcon == NULL)
158 return rc;
159
160 if (smb2_command == SMB2_TREE_CONNECT)
161 return rc;
162
163 if (tcon->tidStatus == CifsExiting) {
164 /*
165 * only tree disconnect, open, and write,
166 * (and ulogoff which does not have tcon)
167 * are allowed as we start force umount.
168 */
169 if ((smb2_command != SMB2_WRITE) &&
170 (smb2_command != SMB2_CREATE) &&
171 (smb2_command != SMB2_TREE_DISCONNECT)) {
f96637be
JP		 172 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
173 smb2_command);
aa24d1e9
PS		 174 return -ENODEV;
175 }
176 }
177 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
178 (!tcon->ses->server))
179 return -EIO;
180
181 ses = tcon->ses;
182 server = ses->server;
183
184 /*
185 * Give demultiplex thread up to 10 seconds to reconnect, should be
186 * greater than cifs socket timeout which is 7 seconds
187 */
188 while (server->tcpStatus == CifsNeedReconnect) {
189 /*
190 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
191 * here since they are implicitly done when session drops.
192 */
193 switch (smb2_command) {
194 /*
195 * BB Should we keep oplock break and add flush to exceptions?
196 */
197 case SMB2_TREE_DISCONNECT:
198 case SMB2_CANCEL:
199 case SMB2_CLOSE:
200 case SMB2_OPLOCK_BREAK:
201 return -EAGAIN;
202 }
203
204 wait_event_interruptible_timeout(server->response_q,
205 (server->tcpStatus != CifsNeedReconnect), 10 * HZ);
206
207 /* are we still trying to reconnect? */
208 if (server->tcpStatus != CifsNeedReconnect)
209 break;
210
211 /*
212 * on "soft" mounts we wait once. Hard mounts keep
213 * retrying until process is killed or server comes
214 * back on-line
215 */
216 if (!tcon->retry) {
f96637be 217 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
aa24d1e9
PS		 218 return -EHOSTDOWN;
219 }
220 }
221
222 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
223 return rc;
224
225 nls_codepage = load_nls_default();
226
227 /*
228 * need to prevent multiple threads trying to simultaneously reconnect
229 * the same SMB session
230 */
231 mutex_lock(&tcon->ses->session_mutex);
232 rc = cifs_negotiate_protocol(0, tcon->ses);
233 if (!rc && tcon->ses->need_reconnect)
234 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
235
236 if (rc || !tcon->need_reconnect) {
237 mutex_unlock(&tcon->ses->session_mutex);
238 goto out;
239 }
240
241 cifs_mark_open_files_invalid(tcon);
242 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
243 mutex_unlock(&tcon->ses->session_mutex);
f96637be 244 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
aa24d1e9
PS		 245 if (rc)
246 goto out;
247 atomic_inc(&tconInfoReconnectCount);
aa24d1e9
PS		 248out:
249 /*
250 * Check if handle based operation so we know whether we can continue
251 * or not without returning to caller to reset file handle.
252 */
253 /*
254 * BB Is flush done by server on drop of tcp session? Should we special
255 * case it and skip above?
256 */
257 switch (smb2_command) {
258 case SMB2_FLUSH:
259 case SMB2_READ:
260 case SMB2_WRITE:
261 case SMB2_LOCK:
262 case SMB2_IOCTL:
263 case SMB2_QUERY_DIRECTORY:
264 case SMB2_CHANGE_NOTIFY:
265 case SMB2_QUERY_INFO:
266 case SMB2_SET_INFO:
267 return -EAGAIN;
268 }
269 unload_nls(nls_codepage);
ec2e4523
PS		 270 return rc;
271}
272
273/*
274 * Allocate and return pointer to an SMB request hdr, and set basic
275 * SMB information in the SMB header. If the return code is zero, this
276 * function must have filled in request_buf pointer.
277 */
278static int
279small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
280 void **request_buf)
281{
282 int rc = 0;
283
284 rc = smb2_reconnect(smb2_command, tcon);
285 if (rc)
286 return rc;
287
288 /* BB eventually switch this to SMB2 specific small buf size */
289 *request_buf = cifs_small_buf_get();
290 if (*request_buf == NULL) {
291 /* BB should we add a retry in here if not a writepage? */
292 return -ENOMEM;
293 }
294
295 smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon);
296
297 if (tcon != NULL) {
298#ifdef CONFIG_CIFS_STATS2
ec2e4523
PS		 299 uint16_t com_code = le16_to_cpu(smb2_command);
300 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
ec2e4523
PS		 301#endif
302 cifs_stats_inc(&tcon->num_smbs_sent);
303 }
304
305 return rc;
306}
307
ebb3a9d4
SF		 308#ifdef CONFIG_CIFS_SMB311
309/* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
310#define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
311
312
313#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
314#define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
315
316static void
317build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
318{
319 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
320 pneg_ctxt->DataLength = cpu_to_le16(38);
321 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
322 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
323 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
324 pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
325}
326
327static void
328build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
329{
330 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
331 pneg_ctxt->DataLength = cpu_to_le16(6);
332 pneg_ctxt->CipherCount = cpu_to_le16(2);
333 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
334 pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM;
335}
336
337static void
338assemble_neg_contexts(struct smb2_negotiate_req *req)
339{
340
341 /* +4 is to account for the RFC1001 len field */
342 char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT + 4;
343
344 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
345 /* Add 2 to size to round to 8 byte boundary */
346 pneg_ctxt += 2 + sizeof(struct smb2_preauth_neg_context);
347 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
348 req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
349 req->NegotiateContextCount = cpu_to_le16(2);
350 inc_rfc1001_len(req, 4 + sizeof(struct smb2_preauth_neg_context) + 2
351 + sizeof(struct smb2_encryption_neg_context)); /* calculate hash */
352}
353#else
354static void assemble_neg_contexts(struct smb2_negotiate_req *req)
355{
356 return;
357}
358#endif /* SMB311 */
359
360
ec2e4523
PS		 361/*
362 *
363 * SMB2 Worker functions follow:
364 *
365 * The general structure of the worker functions is:
366 * 1) Call smb2_init (assembles SMB2 header)
367 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
368 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
369 * 4) Decode SMB2 command specific fields in the fixed length area
370 * 5) Decode variable length data area (if any for this SMB2 command type)
371 * 6) Call free smb buffer
372 * 7) return
373 *
374 */
375
376int
377SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
378{
379 struct smb2_negotiate_req *req;
380 struct smb2_negotiate_rsp *rsp;
381 struct kvec iov[1];
382 int rc = 0;
383 int resp_buftype;
3534b850 384 struct TCP_Server_Info *server = ses->server;
ec2e4523
PS		 385 int blob_offset, blob_length;
386 char *security_blob;
387 int flags = CIFS_NEG_OP;
388
f96637be 389 cifs_dbg(FYI, "Negotiate protocol\n");
ec2e4523 390
3534b850
JL		 391 if (!server) {
392 WARN(1, "%s: server is NULL!\n", __func__);
393 return -EIO;
ec2e4523
PS		 394 }
395
396 rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
397 if (rc)
398 return rc;
399
ec2e4523
PS		 400 req->hdr.SessionId = 0;
401
e4aa25e7 402 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
ec2e4523 403
e4aa25e7
SF		 404 req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */
405 inc_rfc1001_len(req, 2);
ec2e4523
PS		 406
407 /* only one of SMB2 signing flags may be set in SMB2 request */
38d77c50 408 if (ses->sign)
9cd2e62c 409 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
38d77c50 410 else if (global_secflags & CIFSSEC_MAY_SIGN)
9cd2e62c 411 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
38d77c50
JL		 412 else
413 req->SecurityMode = 0;
ec2e4523 414
e4aa25e7 415 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
ec2e4523 416
3c5f9be1
SF		 417 /* ClientGUID must be zero for SMB2.02 dialect */
418 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
419 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
ebb3a9d4 420 else {
3c5f9be1
SF		 421 memcpy(req->ClientGUID, server->client_guid,
422 SMB2_CLIENT_GUID_SIZE);
ebb3a9d4
SF		 423 if (ses->server->vals->protocol_id == SMB311_PROT_ID)
424 assemble_neg_contexts(req);
425 }
ec2e4523
PS		 426 iov[0].iov_base = (char *)req;
427 /* 4 for rfc1002 length field */
428 iov[0].iov_len = get_rfc1002_length(req) + 4;
429
430 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags);
431
432 rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base;
433 /*
434 * No tcon so can't do
435 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
436 */
437 if (rc != 0)
438 goto neg_exit;
439
f96637be 440 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
ec2e4523 441
e4aa25e7
SF		 442 /* BB we may eventually want to match the negotiated vs. requested
443 dialect, even though we are only requesting one at a time */
444 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
f96637be 445 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
e4aa25e7 446 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
f96637be 447 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
e4aa25e7 448 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
f96637be 449 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
20b6d8b4
SF		 450 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
451 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
5f7fbf73
SF		 452#ifdef CONFIG_CIFS_SMB311
453 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
454 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
455#endif /* SMB311 */
ec2e4523 456 else {
f799d623 457 cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
f96637be 458 le16_to_cpu(rsp->DialectRevision));
ec2e4523
PS		 459 rc = -EIO;
460 goto neg_exit;
461 }
462 server->dialect = le16_to_cpu(rsp->DialectRevision);
463
e598d1d8
JL		 464 /* SMB2 only has an extended negflavor */
465 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
2365c4ea
PS		 466 /* set it to the maximum buffer size value we can send with 1 credit */
467 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
468 SMB2_MAX_BUFFER_SIZE);
ec2e4523
PS		 469 server->max_read = le32_to_cpu(rsp->MaxReadSize);
470 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
471 /* BB Do we need to validate the SecurityMode? */
472 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
473 server->capabilities = le32_to_cpu(rsp->Capabilities);
29e20f9c
PS		 474 /* Internal types */
475 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
ec2e4523
PS		 476
477 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
478 &rsp->hdr);
5d875cc9
SF		 479 /*
480 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
481 * for us will be
482 * ses->sectype = RawNTLMSSP;
483 * but for time being this is our only auth choice so doesn't matter.
484 * We just found a server which sets blob length to zero expecting raw.
485 */
486 if (blob_length == 0)
487 cifs_dbg(FYI, "missing security blob on negprot\n");
3c1bf7e4 488
38d77c50 489 rc = cifs_enable_signing(server, ses->sign);
9ddec561
JL		 490 if (rc)
491 goto neg_exit;
ceb1b0b9 492 if (blob_length) {
ebdd207e 493 rc = decode_negTokenInit(security_blob, blob_length, server);
ceb1b0b9
SF		 494 if (rc == 1)
495 rc = 0;
496 else if (rc == 0)
497 rc = -EIO;
ec2e4523 498 }
ec2e4523
PS		 499neg_exit:
500 free_rsp_buf(resp_buftype, rsp);
501 return rc;
502}
5478f9ba 503
ff1c038a
SF		 504int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
505{
506 int rc = 0;
507 struct validate_negotiate_info_req vneg_inbuf;
508 struct validate_negotiate_info_rsp *pneg_rsp;
509 u32 rsplen;
510
511 cifs_dbg(FYI, "validate negotiate\n");
512
513 /*
514 * validation ioctl must be signed, so no point sending this if we
515 * can not sign it. We could eventually change this to selectively
516 * sign just this, the first and only signed request on a connection.
517 * This is good enough for now since a user who wants better security
518 * would also enable signing on the mount. Having validation of
519 * negotiate info for signed connections helps reduce attack vectors
520 */
521 if (tcon->ses->server->sign == false)
522 return 0; /* validation requires signing */
523
524 vneg_inbuf.Capabilities =
525 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
39552ea8
SP		 526 memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid,
527 SMB2_CLIENT_GUID_SIZE);
ff1c038a
SF		 528
529 if (tcon->ses->sign)
530 vneg_inbuf.SecurityMode =
531 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
532 else if (global_secflags & CIFSSEC_MAY_SIGN)
533 vneg_inbuf.SecurityMode =
534 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
535 else
536 vneg_inbuf.SecurityMode = 0;
537
538 vneg_inbuf.DialectCount = cpu_to_le16(1);
539 vneg_inbuf.Dialects[0] =
540 cpu_to_le16(tcon->ses->server->vals->protocol_id);
541
542 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
543 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
544 (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
545 (char **)&pneg_rsp, &rsplen);
546
547 if (rc != 0) {
548 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
549 return -EIO;
550 }
551
552 if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
553 cifs_dbg(VFS, "invalid size of protocol negotiate response\n");
554 return -EIO;
555 }
556
557 /* check validate negotiate info response matches what we got earlier */
558 if (pneg_rsp->Dialect !=
559 cpu_to_le16(tcon->ses->server->vals->protocol_id))
560 goto vneg_out;
561
562 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
563 goto vneg_out;
564
565 /* do not validate server guid because not saved at negprot time yet */
566
567 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
568 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
569 goto vneg_out;
570
571 /* validate negotiate successful */
572 cifs_dbg(FYI, "validate negotiate info successful\n");
573 return 0;
574
575vneg_out:
576 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
577 return -EIO;
578}
579
5478f9ba
PS		 580int
581SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
582 const struct nls_table *nls_cp)
583{
584 struct smb2_sess_setup_req *req;
585 struct smb2_sess_setup_rsp *rsp = NULL;
586 struct kvec iov[2];
587 int rc = 0;
7de975e3 588 int resp_buftype = CIFS_NO_BUFFER;
5478f9ba 589 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
3534b850 590 struct TCP_Server_Info *server = ses->server;
5478f9ba 591 u16 blob_length = 0;
ceb1b0b9
SF		 592 struct key *spnego_key = NULL;
593 char *security_blob = NULL;
5478f9ba
PS		 594 char *ntlmssp_blob = NULL;
595 bool use_spnego = false; /* else use raw ntlmssp */
596
f96637be 597 cifs_dbg(FYI, "Session Setup\n");
5478f9ba 598
3534b850
JL		 599 if (!server) {
600 WARN(1, "%s: server is NULL!\n", __func__);
601 return -EIO;
5478f9ba
PS		 602 }
603
d4e63bd6
SP		 604 /*
605 * If we are here due to reconnect, free per-smb session key
606 * in case signing was required.
607 */
608 kfree(ses->auth_key.response);
609 ses->auth_key.response = NULL;
610
5478f9ba
PS		 611 /*
612 * If memory allocation is successful, caller of this function
613 * frees it.
614 */
615 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
616 if (!ses->ntlmssp)
617 return -ENOMEM;
5c234aa5 618 ses->ntlmssp->sesskey_per_smbsess = true;
5478f9ba 619
3f618223 620 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
ceb1b0b9
SF		 621 if (ses->sectype != Kerberos && ses->sectype != RawNTLMSSP)
622 ses->sectype = RawNTLMSSP;
5478f9ba
PS		 623
624ssetup_ntlmssp_authenticate:
625 if (phase == NtLmChallenge)
626 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
627
628 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
629 if (rc)
630 return rc;
631
5478f9ba 632 req->hdr.SessionId = 0; /* First session, not a reauthenticate */
eed0e175 633 req->Flags = 0; /* MBZ */
5478f9ba
PS		 634 /* to enable echos and oplocks */
635 req->hdr.CreditRequest = cpu_to_le16(3);
636
637 /* only one of SMB2 signing flags may be set in SMB2 request */
38d77c50
JL		 638 if (server->sign)
639 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
640 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
641 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
642 else
643 req->SecurityMode = 0;
644
5478f9ba
PS		 645 req->Capabilities = 0;
646 req->Channel = 0; /* MBZ */
647
648 iov[0].iov_base = (char *)req;
649 /* 4 for rfc1002 length field and 1 for pad */
650 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
ceb1b0b9
SF		 651
652 if (ses->sectype == Kerberos) {
653#ifdef CONFIG_CIFS_UPCALL
654 struct cifs_spnego_msg *msg;
655
656 spnego_key = cifs_get_spnego_key(ses);
657 if (IS_ERR(spnego_key)) {
658 rc = PTR_ERR(spnego_key);
659 spnego_key = NULL;
660 goto ssetup_exit;
661 }
662
663 msg = spnego_key->payload.data;
664 /*
665 * check version field to make sure that cifs.upcall is
666 * sending us a response in an expected form
667 */
668 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
669 cifs_dbg(VFS,
670 "bad cifs.upcall version. Expected %d got %d",
671 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
672 rc = -EKEYREJECTED;
673 goto ssetup_exit;
674 }
675 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
676 GFP_KERNEL);
677 if (!ses->auth_key.response) {
678 cifs_dbg(VFS,
679 "Kerberos can't allocate (%u bytes) memory",
680 msg->sesskey_len);
681 rc = -ENOMEM;
682 goto ssetup_exit;
683 }
684 ses->auth_key.len = msg->sesskey_len;
685 blob_length = msg->secblob_len;
686 iov[1].iov_base = msg->data + msg->sesskey_len;
687 iov[1].iov_len = blob_length;
688#else
689 rc = -EOPNOTSUPP;
690 goto ssetup_exit;
691#endif /* CONFIG_CIFS_UPCALL */
692 } else if (phase == NtLmNegotiate) { /* if not krb5 must be ntlmssp */
5478f9ba
PS		 693 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
694 GFP_KERNEL);
695 if (ntlmssp_blob == NULL) {
696 rc = -ENOMEM;
697 goto ssetup_exit;
698 }
699 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
700 if (use_spnego) {
701 /* blob_length = build_spnego_ntlmssp_blob(
702 &security_blob,
703 sizeof(struct _NEGOTIATE_MESSAGE),
704 ntlmssp_blob); */
705 /* BB eventually need to add this */
f96637be 706 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
5478f9ba
PS		 707 rc = -EOPNOTSUPP;
708 kfree(ntlmssp_blob);
709 goto ssetup_exit;
710 } else {
711 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
712 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
713 security_blob = ntlmssp_blob;
714 }
ceb1b0b9
SF		 715 iov[1].iov_base = security_blob;
716 iov[1].iov_len = blob_length;
5478f9ba
PS		 717 } else if (phase == NtLmAuthenticate) {
718 req->hdr.SessionId = ses->Suid;
719 ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500,
720 GFP_KERNEL);
721 if (ntlmssp_blob == NULL) {
5478f9ba
PS		 722 rc = -ENOMEM;
723 goto ssetup_exit;
724 }
725 rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses,
726 nls_cp);
727 if (rc) {
f96637be
JP		 728 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n",
729 rc);
5478f9ba
PS		 730 goto ssetup_exit; /* BB double check error handling */
731 }
732 if (use_spnego) {
733 /* blob_length = build_spnego_ntlmssp_blob(
734 &security_blob,
735 blob_length,
736 ntlmssp_blob); */
f96637be 737 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
5478f9ba
PS		 738 rc = -EOPNOTSUPP;
739 kfree(ntlmssp_blob);
740 goto ssetup_exit;
741 } else {
742 security_blob = ntlmssp_blob;
743 }
ceb1b0b9
SF		 744 iov[1].iov_base = security_blob;
745 iov[1].iov_len = blob_length;
5478f9ba 746 } else {
f96637be 747 cifs_dbg(VFS, "illegal ntlmssp phase\n");
5478f9ba
PS		 748 rc = -EIO;
749 goto ssetup_exit;
750 }
751
752 /* Testing shows that buffer offset must be at location of Buffer[0] */
753 req->SecurityBufferOffset =
754 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
755 1 /* pad */ - 4 /* rfc1001 len */);
756 req->SecurityBufferLength = cpu_to_le16(blob_length);
5478f9ba
PS		 757
758 inc_rfc1001_len(req, blob_length - 1 /* pad */);
759
760 /* BB add code to build os and lm fields */
761
6d8b59d7
SF		 762 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype,
763 CIFS_LOG_ERROR | CIFS_NEG_OP);
5478f9ba
PS		 764
765 kfree(security_blob);
766 rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base;
ceb1b0b9 767 ses->Suid = rsp->hdr.SessionId;
4ca3a99c
PS		 768 if (resp_buftype != CIFS_NO_BUFFER &&
769 rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) {
5478f9ba 770 if (phase != NtLmNegotiate) {
f96637be 771 cifs_dbg(VFS, "Unexpected more processing error\n");
5478f9ba
PS		 772 goto ssetup_exit;
773 }
774 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
4ca3a99c 775 le16_to_cpu(rsp->SecurityBufferOffset)) {
f96637be
JP		 776 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
777 le16_to_cpu(rsp->SecurityBufferOffset));
5478f9ba
PS		 778 rc = -EIO;
779 goto ssetup_exit;
780 }
781
782 /* NTLMSSP Negotiate sent now processing challenge (response) */
783 phase = NtLmChallenge; /* process ntlmssp challenge */
784 rc = 0; /* MORE_PROCESSING is not an error here but expected */
5478f9ba
PS		 785 rc = decode_ntlmssp_challenge(rsp->Buffer,
786 le16_to_cpu(rsp->SecurityBufferLength), ses);
787 }
788
789 /*
790 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
791 * but at least the raw NTLMSSP case works.
792 */
793 /*
794 * No tcon so can't do
795 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
796 */
797 if (rc != 0)
798 goto ssetup_exit;
799
5478f9ba 800 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
0cbaa53c
SF		 801 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
802 cifs_dbg(VFS, "SMB3 encryption not supported yet\n");
5478f9ba
PS		 803ssetup_exit:
804 free_rsp_buf(resp_buftype, rsp);
805
806 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
807 if ((phase == NtLmChallenge) && (rc == 0))
808 goto ssetup_ntlmssp_authenticate;
d4e63bd6
SP		 809
810 if (!rc) {
811 mutex_lock(&server->srv_mutex);
32811d24
SP		 812 if (server->sign && server->ops->generate_signingkey) {
813 rc = server->ops->generate_signingkey(ses);
814 kfree(ses->auth_key.response);
815 ses->auth_key.response = NULL;
816 if (rc) {
817 cifs_dbg(FYI,
818 "SMB3 session key generation failed\n");
819 mutex_unlock(&server->srv_mutex);
820 goto keygen_exit;
821 }
822 }
d4e63bd6
SP		 823 if (!server->session_estab) {
824 server->sequence_number = 0x2;
825 server->session_estab = true;
d4e63bd6
SP		 826 }
827 mutex_unlock(&server->srv_mutex);
828
829 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
830 spin_lock(&GlobalMid_Lock);
831 ses->status = CifsGood;
832 ses->need_reconnect = false;
833 spin_unlock(&GlobalMid_Lock);
834 }
835
32811d24 836keygen_exit:
d4e63bd6
SP		 837 if (!server->sign) {
838 kfree(ses->auth_key.response);
839 ses->auth_key.response = NULL;
840 }
ceb1b0b9
SF		 841 if (spnego_key) {
842 key_invalidate(spnego_key);
843 key_put(spnego_key);
844 }
d4e63bd6
SP		 845 kfree(ses->ntlmssp);
846
5478f9ba
PS		 847 return rc;
848}
849
850int
851SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
852{
853 struct smb2_logoff_req *req; /* response is also trivial struct */
854 int rc = 0;
855 struct TCP_Server_Info *server;
856
f96637be 857 cifs_dbg(FYI, "disconnect session %p\n", ses);
5478f9ba
PS		 858
859 if (ses && (ses->server))
860 server = ses->server;
861 else
862 return -EIO;
863
eb4c7df6
SP		 864 /* no need to send SMB logoff if uid already closed due to reconnect */
865 if (ses->need_reconnect)
866 goto smb2_session_already_dead;
867
5478f9ba
PS		 868 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
869 if (rc)
870 return rc;
871
872 /* since no tcon, smb2_init can not do this, so do here */
873 req->hdr.SessionId = ses->Suid;
38d77c50 874 if (server->sign)
3c1bf7e4 875 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
5478f9ba
PS		 876
877 rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0);
878 /*
879 * No tcon so can't do
880 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
881 */
eb4c7df6
SP		 882
883smb2_session_already_dead:
5478f9ba
PS		 884 return rc;
885}
faaf946a
PS		 886
887static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
888{
d60622eb 889 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
faaf946a
PS		 890}
891
892#define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
893
de9f68df
SF		 894/* These are similar values to what Windows uses */
895static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
896{
897 tcon->max_chunks = 256;
898 tcon->max_bytes_chunk = 1048576;
899 tcon->max_bytes_copy = 16777216;
900}
901
faaf946a
PS		 902int
903SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
904 struct cifs_tcon *tcon, const struct nls_table *cp)
905{
906 struct smb2_tree_connect_req *req;
907 struct smb2_tree_connect_rsp *rsp = NULL;
908 struct kvec iov[2];
909 int rc = 0;
910 int resp_buftype;
911 int unc_path_len;
912 struct TCP_Server_Info *server;
913 __le16 *unc_path = NULL;
914
f96637be 915 cifs_dbg(FYI, "TCON\n");
faaf946a
PS		 916
917 if ((ses->server) && tree)
918 server = ses->server;
919 else
920 return -EIO;
921
922 if (tcon && tcon->bad_network_name)
923 return -ENOENT;
924
925 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
926 if (unc_path == NULL)
927 return -ENOMEM;
928
929 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
930 unc_path_len *= 2;
931 if (unc_path_len < 2) {
932 kfree(unc_path);
933 return -EINVAL;
934 }
935
936 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
937 if (rc) {
938 kfree(unc_path);
939 return rc;
940 }
941
942 if (tcon == NULL) {
943 /* since no tcon, smb2_init can not do this, so do here */
944 req->hdr.SessionId = ses->Suid;
945 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
946 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
947 }
948
949 iov[0].iov_base = (char *)req;
950 /* 4 for rfc1002 length field and 1 for pad */
951 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
952
953 /* Testing shows that buffer offset must be at location of Buffer[0] */
954 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
955 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
956 req->PathLength = cpu_to_le16(unc_path_len - 2);
957 iov[1].iov_base = unc_path;
958 iov[1].iov_len = unc_path_len;
959
960 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
961
962 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
963 rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base;
964
965 if (rc != 0) {
966 if (tcon) {
967 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
968 tcon->need_reconnect = true;
969 }
970 goto tcon_error_exit;
971 }
972
faaf946a
PS		 973 if (tcon == NULL) {
974 ses->ipc_tid = rsp->hdr.TreeId;
975 goto tcon_exit;
976 }
977
978 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
f96637be 979 cifs_dbg(FYI, "connection to disk share\n");
faaf946a
PS		 980 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
981 tcon->ipc = true;
f96637be 982 cifs_dbg(FYI, "connection to pipe share\n");
faaf946a
PS		 983 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
984 tcon->print = true;
f96637be 985 cifs_dbg(FYI, "connection to printer\n");
faaf946a 986 } else {
f96637be 987 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
faaf946a
PS		 988 rc = -EOPNOTSUPP;
989 goto tcon_error_exit;
990 }
991
992 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
769ee6a4 993 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
faaf946a
PS		 994 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
995 tcon->tidStatus = CifsGood;
996 tcon->need_reconnect = false;
997 tcon->tid = rsp->hdr.TreeId;
46b51d08 998 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
faaf946a
PS		 999
1000 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1001 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
f96637be 1002 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
de9f68df 1003 init_copy_chunk_defaults(tcon);
ff1c038a
SF		 1004 if (tcon->ses->server->ops->validate_negotiate)
1005 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
faaf946a
PS		 1006tcon_exit:
1007 free_rsp_buf(resp_buftype, rsp);
1008 kfree(unc_path);
1009 return rc;
1010
1011tcon_error_exit:
1012 if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) {
f96637be 1013 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
18f39e7b
SF		 1014 if (tcon)
1015 tcon->bad_network_name = true;
faaf946a
PS		 1016 }
1017 goto tcon_exit;
1018}
1019
1020int
1021SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1022{
1023 struct smb2_tree_disconnect_req *req; /* response is trivial */
1024 int rc = 0;
1025 struct TCP_Server_Info *server;
1026 struct cifs_ses *ses = tcon->ses;
1027
f96637be 1028 cifs_dbg(FYI, "Tree Disconnect\n");
faaf946a
PS		 1029
1030 if (ses && (ses->server))
1031 server = ses->server;
1032 else
1033 return -EIO;
1034
1035 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1036 return 0;
1037
1038 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
1039 if (rc)
1040 return rc;
1041
1042 rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0);
1043 if (rc)
1044 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1045
1046 return rc;
1047}
2503a0db 1048
b8c32dbb 1049
63eb3def
PS		 1050static struct create_durable *
1051create_durable_buf(void)
1052{
1053 struct create_durable *buf;
1054
1055 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1056 if (!buf)
1057 return NULL;
1058
1059 buf->ccontext.DataOffset = cpu_to_le16(offsetof
9cbc0b73 1060 (struct create_durable, Data));
63eb3def
PS		 1061 buf->ccontext.DataLength = cpu_to_le32(16);
1062 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1063 (struct create_durable, Name));
1064 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 1065 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
63eb3def
PS		 1066 buf->Name[0] = 'D';
1067 buf->Name[1] = 'H';
1068 buf->Name[2] = 'n';
1069 buf->Name[3] = 'Q';
1070 return buf;
1071}
1072
9cbc0b73
PS		 1073static struct create_durable *
1074create_reconnect_durable_buf(struct cifs_fid *fid)
1075{
1076 struct create_durable *buf;
1077
1078 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1079 if (!buf)
1080 return NULL;
1081
1082 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1083 (struct create_durable, Data));
1084 buf->ccontext.DataLength = cpu_to_le32(16);
1085 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1086 (struct create_durable, Name));
1087 buf->ccontext.NameLength = cpu_to_le16(4);
1088 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1089 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
12197a7f 1090 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
9cbc0b73
PS		 1091 buf->Name[0] = 'D';
1092 buf->Name[1] = 'H';
1093 buf->Name[2] = 'n';
1094 buf->Name[3] = 'C';
1095 return buf;
1096}
1097
b8c32dbb 1098static __u8
42873b0a
PS		 1099parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
1100 unsigned int *epoch)
b8c32dbb
PS		 1101{
1102 char *data_offset;
b5c7cde3 1103 struct create_context *cc;
fd554396
PS		 1104 unsigned int next = 0;
1105 char *name;
b8c32dbb 1106
fd554396 1107 data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
b5c7cde3 1108 cc = (struct create_context *)data_offset;
b8c32dbb 1109 do {
b5c7cde3
PS		 1110 cc = (struct create_context *)((char *)cc + next);
1111 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
1112 if (le16_to_cpu(cc->NameLength) != 4 ||
b8c32dbb 1113 strncmp(name, "RqLs", 4)) {
b5c7cde3 1114 next = le32_to_cpu(cc->Next);
b8c32dbb
PS		 1115 continue;
1116 }
42873b0a 1117 return server->ops->parse_lease_buf(cc, epoch);
fd554396 1118 } while (next != 0);
b8c32dbb 1119
b5c7cde3 1120 return 0;
b8c32dbb
PS		 1121}
1122
d22cbfec 1123static int
a41a28bd
PS		 1124add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1125 unsigned int *num_iovec, __u8 *oplock)
d22cbfec
PS		 1126{
1127 struct smb2_create_req *req = iov[0].iov_base;
1128 unsigned int num = *num_iovec;
1129
a41a28bd 1130 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
d22cbfec
PS		 1131 if (iov[num].iov_base == NULL)
1132 return -ENOMEM;
a41a28bd 1133 iov[num].iov_len = server->vals->create_lease_size;
d22cbfec
PS		 1134 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1135 if (!req->CreateContextsOffset)
1136 req->CreateContextsOffset = cpu_to_le32(
1137 sizeof(struct smb2_create_req) - 4 +
1138 iov[num - 1].iov_len);
a41a28bd
PS		 1139 le32_add_cpu(&req->CreateContextsLength,
1140 server->vals->create_lease_size);
1141 inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
d22cbfec
PS		 1142 *num_iovec = num + 1;
1143 return 0;
1144}
1145
63eb3def 1146static int
9cbc0b73
PS		 1147add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1148 struct cifs_open_parms *oparms)
63eb3def
PS		 1149{
1150 struct smb2_create_req *req = iov[0].iov_base;
1151 unsigned int num = *num_iovec;
1152
9cbc0b73
PS		 1153 if (oparms->reconnect) {
1154 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1155 /* indicate that we don't need to relock the file */
1156 oparms->reconnect = false;
1157 } else
1158 iov[num].iov_base = create_durable_buf();
63eb3def
PS		 1159 if (iov[num].iov_base == NULL)
1160 return -ENOMEM;
1161 iov[num].iov_len = sizeof(struct create_durable);
1162 if (!req->CreateContextsOffset)
1163 req->CreateContextsOffset =
1164 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1165 iov[1].iov_len);
31f92e9a 1166 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
63eb3def
PS		 1167 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
1168 *num_iovec = num + 1;
1169 return 0;
1170}
1171
2503a0db 1172int
064f6047 1173SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
b42bf888
PS		 1174 __u8 *oplock, struct smb2_file_all_info *buf,
1175 struct smb2_err_rsp **err_buf)
2503a0db
PS		 1176{
1177 struct smb2_create_req *req;
1178 struct smb2_create_rsp *rsp;
1179 struct TCP_Server_Info *server;
064f6047 1180 struct cifs_tcon *tcon = oparms->tcon;
2503a0db 1181 struct cifs_ses *ses = tcon->ses;
63eb3def 1182 struct kvec iov[4];
2503a0db
PS		 1183 int resp_buftype;
1184 int uni_path_len;
b8c32dbb
PS		 1185 __le16 *copy_path = NULL;
1186 int copy_size;
2503a0db 1187 int rc = 0;
59aa3718 1188 unsigned int num_iovecs = 2;
ca81983f 1189 __u32 file_attributes = 0;
663a9621 1190 char *dhc_buf = NULL, *lc_buf = NULL;
2503a0db 1191
f96637be 1192 cifs_dbg(FYI, "create/open\n");
2503a0db
PS		 1193
1194 if (ses && (ses->server))
1195 server = ses->server;
1196 else
1197 return -EIO;
1198
1199 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
1200 if (rc)
1201 return rc;
1202
064f6047 1203 if (oparms->create_options & CREATE_OPTION_READONLY)
ca81983f 1204 file_attributes |= ATTR_READONLY;
db8b631d
SF		 1205 if (oparms->create_options & CREATE_OPTION_SPECIAL)
1206 file_attributes |= ATTR_SYSTEM;
ca81983f 1207
2503a0db 1208 req->ImpersonationLevel = IL_IMPERSONATION;
064f6047 1209 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
2503a0db
PS		 1210 /* File attributes ignored on open (used in create though) */
1211 req->FileAttributes = cpu_to_le32(file_attributes);
1212 req->ShareAccess = FILE_SHARE_ALL_LE;
064f6047
PS		 1213 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1214 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
2503a0db 1215 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
59aa3718
PS		 1216 /* do not count rfc1001 len field */
1217 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
2503a0db
PS		 1218
1219 iov[0].iov_base = (char *)req;
1220 /* 4 for rfc1002 length field */
1221 iov[0].iov_len = get_rfc1002_length(req) + 4;
1222
1223 /* MUST set path len (NameLength) to 0 opening root of share */
59aa3718
PS		 1224 req->NameLength = cpu_to_le16(uni_path_len - 2);
1225 /* -1 since last byte is buf[0] which is sent below (path) */
1226 iov[0].iov_len--;
1227 if (uni_path_len % 8 != 0) {
1228 copy_size = uni_path_len / 8 * 8;
1229 if (copy_size < uni_path_len)
1230 copy_size += 8;
1231
1232 copy_path = kzalloc(copy_size, GFP_KERNEL);
1233 if (!copy_path)
1234 return -ENOMEM;
1235 memcpy((char *)copy_path, (const char *)path,
1236 uni_path_len);
1237 uni_path_len = copy_size;
1238 path = copy_path;
2503a0db
PS		 1239 }
1240
59aa3718
PS		 1241 iov[1].iov_len = uni_path_len;
1242 iov[1].iov_base = path;
1243 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1244 inc_rfc1001_len(req, uni_path_len - 1);
1245
b8c32dbb
PS		 1246 if (!server->oplocks)
1247 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1248
a41a28bd 1249 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
b8c32dbb
PS		 1250 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1251 req->RequestedOplockLevel = *oplock;
1252 else {
a41a28bd 1253 rc = add_lease_context(server, iov, &num_iovecs, oplock);
d22cbfec 1254 if (rc) {
b8c32dbb
PS		 1255 cifs_small_buf_release(req);
1256 kfree(copy_path);
d22cbfec 1257 return rc;
b8c32dbb 1258 }
663a9621 1259 lc_buf = iov[num_iovecs-1].iov_base;
b8c32dbb
PS		 1260 }
1261
63eb3def
PS		 1262 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1263 /* need to set Next field of lease context if we request it */
a41a28bd 1264 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
63eb3def
PS		 1265 struct create_context *ccontext =
1266 (struct create_context *)iov[num_iovecs-1].iov_base;
1c46943f 1267 ccontext->Next =
a41a28bd 1268 cpu_to_le32(server->vals->create_lease_size);
63eb3def 1269 }
9cbc0b73 1270 rc = add_durable_context(iov, &num_iovecs, oparms);
63eb3def
PS		 1271 if (rc) {
1272 cifs_small_buf_release(req);
1273 kfree(copy_path);
663a9621 1274 kfree(lc_buf);
63eb3def
PS		 1275 return rc;
1276 }
663a9621 1277 dhc_buf = iov[num_iovecs-1].iov_base;
63eb3def
PS		 1278 }
1279
2503a0db
PS		 1280 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1281 rsp = (struct smb2_create_rsp *)iov[0].iov_base;
1282
1283 if (rc != 0) {
1284 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
b42bf888
PS		 1285 if (err_buf)
1286 *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
1287 GFP_KERNEL);
2503a0db
PS		 1288 goto creat_exit;
1289 }
1290
064f6047
PS		 1291 oparms->fid->persistent_fid = rsp->PersistentFileId;
1292 oparms->fid->volatile_fid = rsp->VolatileFileId;
f0df737e
PS		 1293
1294 if (buf) {
1295 memcpy(buf, &rsp->CreationTime, 32);
1296 buf->AllocationSize = rsp->AllocationSize;
1297 buf->EndOfFile = rsp->EndofFile;
1298 buf->Attributes = rsp->FileAttributes;
1299 buf->NumberOfLinks = cpu_to_le32(1);
1300 buf->DeletePending = 0;
1301 }
2e44b288 1302
b8c32dbb 1303 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
42873b0a 1304 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
b8c32dbb
PS		 1305 else
1306 *oplock = rsp->OplockLevel;
2503a0db 1307creat_exit:
b8c32dbb 1308 kfree(copy_path);
663a9621
PS		 1309 kfree(lc_buf);
1310 kfree(dhc_buf);
2503a0db
PS		 1311 free_rsp_buf(resp_buftype, rsp);
1312 return rc;
1313}
1314
4a72dafa
SF		 1315/*
1316 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1317 */
1318int
1319SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1320 u64 volatile_fid, u32 opcode, bool is_fsctl, char *in_data,
1321 u32 indatalen, char **out_data, u32 *plen /* returned data len */)
1322{
1323 struct smb2_ioctl_req *req;
1324 struct smb2_ioctl_rsp *rsp;
1325 struct TCP_Server_Info *server;
8e353106 1326 struct cifs_ses *ses;
4a72dafa
SF		 1327 struct kvec iov[2];
1328 int resp_buftype;
1329 int num_iovecs;
1330 int rc = 0;
1331
1332 cifs_dbg(FYI, "SMB2 IOCTL\n");
1333
3d1a3745
SF		 1334 if (out_data != NULL)
1335 *out_data = NULL;
1336
4a72dafa
SF		 1337 /* zero out returned data len, in case of error */
1338 if (plen)
1339 *plen = 0;
1340
8e353106
SF		 1341 if (tcon)
1342 ses = tcon->ses;
1343 else
1344 return -EIO;
1345
4a72dafa
SF		 1346 if (ses && (ses->server))
1347 server = ses->server;
1348 else
1349 return -EIO;
1350
1351 rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req);
1352 if (rc)
1353 return rc;
1354
1355 req->CtlCode = cpu_to_le32(opcode);
1356 req->PersistentFileId = persistent_fid;
1357 req->VolatileFileId = volatile_fid;
1358
1359 if (indatalen) {
1360 req->InputCount = cpu_to_le32(indatalen);
1361 /* do not set InputOffset if no input data */
1362 req->InputOffset =
1363 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4);
1364 iov[1].iov_base = in_data;
1365 iov[1].iov_len = indatalen;
1366 num_iovecs = 2;
1367 } else
1368 num_iovecs = 1;
1369
1370 req->OutputOffset = 0;
1371 req->OutputCount = 0; /* MBZ */
1372
1373 /*
1374 * Could increase MaxOutputResponse, but that would require more
1375 * than one credit. Windows typically sets this smaller, but for some
1376 * ioctls it may be useful to allow server to send more. No point
1377 * limiting what the server can send as long as fits in one credit
1378 */
1379 req->MaxOutputResponse = cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1380
1381 if (is_fsctl)
1382 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
1383 else
1384 req->Flags = 0;
1385
1386 iov[0].iov_base = (char *)req;
4a72dafa 1387
7ff8d45c
SF		 1388 /*
1389 * If no input data, the size of ioctl struct in
1390 * protocol spec still includes a 1 byte data buffer,
1391 * but if input data passed to ioctl, we do not
1392 * want to double count this, so we do not send
1393 * the dummy one byte of data in iovec[0] if sending
1394 * input data (in iovec[1]). We also must add 4 bytes
1395 * in first iovec to allow for rfc1002 length field.
1396 */
1397
1398 if (indatalen) {
1399 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1400 inc_rfc1001_len(req, indatalen - 1);
1401 } else
1402 iov[0].iov_len = get_rfc1002_length(req) + 4;
1403
4a72dafa
SF		 1404
1405 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1406 rsp = (struct smb2_ioctl_rsp *)iov[0].iov_base;
1407
9bf0c9cd 1408 if ((rc != 0) && (rc != -EINVAL)) {
8e353106 1409 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
4a72dafa 1410 goto ioctl_exit;
9bf0c9cd
SF		 1411 } else if (rc == -EINVAL) {
1412 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
1413 (opcode != FSCTL_SRV_COPYCHUNK)) {
8e353106 1414 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
9bf0c9cd
SF		 1415 goto ioctl_exit;
1416 }
4a72dafa
SF		 1417 }
1418
1419 /* check if caller wants to look at return data or just return rc */
1420 if ((plen == NULL) || (out_data == NULL))
1421 goto ioctl_exit;
1422
1423 *plen = le32_to_cpu(rsp->OutputCount);
1424
1425 /* We check for obvious errors in the output buffer length and offset */
1426 if (*plen == 0)
1427 goto ioctl_exit; /* server returned no data */
1428 else if (*plen > 0xFF00) {
1429 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
1430 *plen = 0;
1431 rc = -EIO;
1432 goto ioctl_exit;
1433 }
1434
1435 if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
1436 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
1437 le32_to_cpu(rsp->OutputOffset));
1438 *plen = 0;
1439 rc = -EIO;
1440 goto ioctl_exit;
1441 }
1442
1443 *out_data = kmalloc(*plen, GFP_KERNEL);
1444 if (*out_data == NULL) {
1445 rc = -ENOMEM;
1446 goto ioctl_exit;
1447 }
1448
1449 memcpy(*out_data, rsp->hdr.ProtocolId + le32_to_cpu(rsp->OutputOffset),
1450 *plen);
1451ioctl_exit:
1452 free_rsp_buf(resp_buftype, rsp);
1453 return rc;
1454}
1455
64a5cfa6
SF		 1456/*
1457 * Individual callers to ioctl worker function follow
1458 */
1459
1460int
1461SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1462 u64 persistent_fid, u64 volatile_fid)
1463{
1464 int rc;
64a5cfa6
SF		 1465 struct compress_ioctl fsctl_input;
1466 char *ret_data = NULL;
1467
1468 fsctl_input.CompressionState =
bc09d141 1469 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
64a5cfa6
SF		 1470
1471 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1472 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
1473 (char *)&fsctl_input /* data input */,
1474 2 /* in data len */, &ret_data /* out data */, NULL);
1475
1476 cifs_dbg(FYI, "set compression rc %d\n", rc);
64a5cfa6
SF		 1477
1478 return rc;
1479}
1480
2503a0db
PS		 1481int
1482SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1483 u64 persistent_fid, u64 volatile_fid)
1484{
1485 struct smb2_close_req *req;
1486 struct smb2_close_rsp *rsp;
1487 struct TCP_Server_Info *server;
1488 struct cifs_ses *ses = tcon->ses;
1489 struct kvec iov[1];
1490 int resp_buftype;
1491 int rc = 0;
1492
f96637be 1493 cifs_dbg(FYI, "Close\n");
2503a0db
PS		 1494
1495 if (ses && (ses->server))
1496 server = ses->server;
1497 else
1498 return -EIO;
1499
1500 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1501 if (rc)
1502 return rc;
1503
1504 req->PersistentFileId = persistent_fid;
1505 req->VolatileFileId = volatile_fid;
1506
1507 iov[0].iov_base = (char *)req;
1508 /* 4 for rfc1002 length field */
1509 iov[0].iov_len = get_rfc1002_length(req) + 4;
1510
1511 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1512 rsp = (struct smb2_close_rsp *)iov[0].iov_base;
1513
1514 if (rc != 0) {
d4a029d2 1515 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
2503a0db
PS		 1516 goto close_exit;
1517 }
1518
2503a0db
PS		 1519 /* BB FIXME - decode close response, update inode for caching */
1520
1521close_exit:
1522 free_rsp_buf(resp_buftype, rsp);
1523 return rc;
1524}
be4cb9e3
PS		 1525
1526static int
1527validate_buf(unsigned int offset, unsigned int buffer_length,
1528 struct smb2_hdr *hdr, unsigned int min_buf_size)
1529
1530{
1531 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
1532 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
1533 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1534 char *end_of_buf = begin_of_buf + buffer_length;
1535
1536
1537 if (buffer_length < min_buf_size) {
f96637be
JP		 1538 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
1539 buffer_length, min_buf_size);
be4cb9e3
PS		 1540 return -EINVAL;
1541 }
1542
1543 /* check if beyond RFC1001 maximum length */
1544 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
f96637be
JP		 1545 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
1546 buffer_length, smb_len);
be4cb9e3
PS		 1547 return -EINVAL;
1548 }
1549
1550 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
f96637be 1551 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
be4cb9e3
PS		 1552 return -EINVAL;
1553 }
1554
1555 return 0;
1556}
1557
1558/*
1559 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1560 * Caller must free buffer.
1561 */
1562static int
1563validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
1564 struct smb2_hdr *hdr, unsigned int minbufsize,
1565 char *data)
1566
1567{
1568 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1569 int rc;
1570
1571 if (!data)
1572 return -EINVAL;
1573
1574 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
1575 if (rc)
1576 return rc;
1577
1578 memcpy(data, begin_of_buf, buffer_length);
1579
1580 return 0;
1581}
1582
f0df737e
PS		 1583static int
1584query_info(const unsigned int xid, struct cifs_tcon *tcon,
1585 u64 persistent_fid, u64 volatile_fid, u8 info_class,
1586 size_t output_len, size_t min_len, void *data)
be4cb9e3
PS		 1587{
1588 struct smb2_query_info_req *req;
1589 struct smb2_query_info_rsp *rsp = NULL;
1590 struct kvec iov[2];
1591 int rc = 0;
1592 int resp_buftype;
1593 struct TCP_Server_Info *server;
1594 struct cifs_ses *ses = tcon->ses;
1595
f96637be 1596 cifs_dbg(FYI, "Query Info\n");
be4cb9e3
PS		 1597
1598 if (ses && (ses->server))
1599 server = ses->server;
1600 else
1601 return -EIO;
1602
1603 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
1604 if (rc)
1605 return rc;
1606
1607 req->InfoType = SMB2_O_INFO_FILE;
f0df737e 1608 req->FileInfoClass = info_class;
be4cb9e3
PS		 1609 req->PersistentFileId = persistent_fid;
1610 req->VolatileFileId = volatile_fid;
1611 /* 4 for rfc1002 length field and 1 for Buffer */
1612 req->InputBufferOffset =
1613 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
f0df737e 1614 req->OutputBufferLength = cpu_to_le32(output_len);
be4cb9e3
PS		 1615
1616 iov[0].iov_base = (char *)req;
1617 /* 4 for rfc1002 length field */
1618 iov[0].iov_len = get_rfc1002_length(req) + 4;
1619
1620 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
e5d04887
PS		 1621 rsp = (struct smb2_query_info_rsp *)iov[0].iov_base;
1622
be4cb9e3
PS		 1623 if (rc) {
1624 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
1625 goto qinf_exit;
1626 }
1627
be4cb9e3
PS		 1628 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
1629 le32_to_cpu(rsp->OutputBufferLength),
f0df737e 1630 &rsp->hdr, min_len, data);
be4cb9e3
PS		 1631
1632qinf_exit:
1633 free_rsp_buf(resp_buftype, rsp);
1634 return rc;
1635}
9094fad1 1636
f0df737e
PS		 1637int
1638SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
1639 u64 persistent_fid, u64 volatile_fid,
1640 struct smb2_file_all_info *data)
1641{
1642 return query_info(xid, tcon, persistent_fid, volatile_fid,
1643 FILE_ALL_INFORMATION,
1bbe4997 1644 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
f0df737e
PS		 1645 sizeof(struct smb2_file_all_info), data);
1646}
1647
1648int
1649SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
1650 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
1651{
1652 return query_info(xid, tcon, persistent_fid, volatile_fid,
1653 FILE_INTERNAL_INFORMATION,
1654 sizeof(struct smb2_file_internal_info),
1655 sizeof(struct smb2_file_internal_info), uniqueid);
1656}
1657
9094fad1
PS		 1658/*
1659 * This is a no-op for now. We're not really interested in the reply, but
1660 * rather in the fact that the server sent one and that server->lstrp
1661 * gets updated.
1662 *
1663 * FIXME: maybe we should consider checking that the reply matches request?
1664 */
1665static void
1666smb2_echo_callback(struct mid_q_entry *mid)
1667{
1668 struct TCP_Server_Info *server = mid->callback_data;
1669 struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf;
1670 unsigned int credits_received = 1;
1671
1672 if (mid->mid_state == MID_RESPONSE_RECEIVED)
1673 credits_received = le16_to_cpu(smb2->hdr.CreditRequest);
1674
5fb4e288 1675 mutex_lock(&server->srv_mutex);
9094fad1 1676 DeleteMidQEntry(mid);
5fb4e288 1677 mutex_unlock(&server->srv_mutex);
9094fad1
PS		 1678 add_credits(server, credits_received, CIFS_ECHO_OP);
1679}
1680
1681int
1682SMB2_echo(struct TCP_Server_Info *server)
1683{
1684 struct smb2_echo_req *req;
1685 int rc = 0;
1686 struct kvec iov;
fec344e3
JL		 1687 struct smb_rqst rqst = { .rq_iov = &iov,
1688 .rq_nvec = 1 };
9094fad1 1689
f96637be 1690 cifs_dbg(FYI, "In echo request\n");
9094fad1
PS		 1691
1692 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
1693 if (rc)
1694 return rc;
1695
1696 req->hdr.CreditRequest = cpu_to_le16(1);
1697
1698 iov.iov_base = (char *)req;
1699 /* 4 for rfc1002 length field */
1700 iov.iov_len = get_rfc1002_length(req) + 4;
1701
fec344e3 1702 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server,
9094fad1
PS		 1703 CIFS_ECHO_OP);
1704 if (rc)
f96637be 1705 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
9094fad1
PS		 1706
1707 cifs_small_buf_release(req);
1708 return rc;
1709}
7a5cfb19
PS		 1710
1711int
1712SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1713 u64 volatile_fid)
1714{
1715 struct smb2_flush_req *req;
1716 struct TCP_Server_Info *server;
1717 struct cifs_ses *ses = tcon->ses;
1718 struct kvec iov[1];
1719 int resp_buftype;
1720 int rc = 0;
1721
f96637be 1722 cifs_dbg(FYI, "Flush\n");
7a5cfb19
PS		 1723
1724 if (ses && (ses->server))
1725 server = ses->server;
1726 else
1727 return -EIO;
1728
1729 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
1730 if (rc)
1731 return rc;
1732
1733 req->PersistentFileId = persistent_fid;
1734 req->VolatileFileId = volatile_fid;
1735
1736 iov[0].iov_base = (char *)req;
1737 /* 4 for rfc1002 length field */
1738 iov[0].iov_len = get_rfc1002_length(req) + 4;
1739
1740 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1741
dfebe400 1742 if (rc != 0)
7a5cfb19
PS		 1743 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
1744
1745 free_rsp_buf(resp_buftype, iov[0].iov_base);
1746 return rc;
1747}
09a4707e
PS		 1748
1749/*
1750 * To form a chain of read requests, any read requests after the first should
1751 * have the end_of_chain boolean set to true.
1752 */
1753static int
1754smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms,
1755 unsigned int remaining_bytes, int request_type)
1756{
1757 int rc = -EACCES;
1758 struct smb2_read_req *req = NULL;
1759
1760 rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req);
1761 if (rc)
1762 return rc;
1763 if (io_parms->tcon->ses->server == NULL)
1764 return -ECONNABORTED;
1765
1766 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1767
1768 req->PersistentFileId = io_parms->persistent_fid;
1769 req->VolatileFileId = io_parms->volatile_fid;
1770 req->ReadChannelInfoOffset = 0; /* reserved */
1771 req->ReadChannelInfoLength = 0; /* reserved */
1772 req->Channel = 0; /* reserved */
1773 req->MinimumCount = 0;
1774 req->Length = cpu_to_le32(io_parms->length);
1775 req->Offset = cpu_to_le64(io_parms->offset);
1776
1777 if (request_type & CHAINED_REQUEST) {
1778 if (!(request_type & END_OF_CHAIN)) {
1779 /* 4 for rfc1002 length field */
1780 req->hdr.NextCommand =
1781 cpu_to_le32(get_rfc1002_length(req) + 4);
1782 } else /* END_OF_CHAIN */
1783 req->hdr.NextCommand = 0;
1784 if (request_type & RELATED_REQUEST) {
1785 req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
1786 /*
1787 * Related requests use info from previous read request
1788 * in chain.
1789 */
1790 req->hdr.SessionId = 0xFFFFFFFF;
1791 req->hdr.TreeId = 0xFFFFFFFF;
1792 req->PersistentFileId = 0xFFFFFFFF;
1793 req->VolatileFileId = 0xFFFFFFFF;
1794 }
1795 }
1796 if (remaining_bytes > io_parms->length)
1797 req->RemainingBytes = cpu_to_le32(remaining_bytes);
1798 else
1799 req->RemainingBytes = 0;
1800
1801 iov[0].iov_base = (char *)req;
1802 /* 4 for rfc1002 length field */
1803 iov[0].iov_len = get_rfc1002_length(req) + 4;
1804 return rc;
1805}
1806
1807static void
1808smb2_readv_callback(struct mid_q_entry *mid)
1809{
1810 struct cifs_readdata *rdata = mid->callback_data;
1811 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
1812 struct TCP_Server_Info *server = tcon->ses->server;
5819575e 1813 struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base;
09a4707e 1814 unsigned int credits_received = 1;
5819575e 1815 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
8321fec4
JL		 1816 .rq_nvec = 1,
1817 .rq_pages = rdata->pages,
1818 .rq_npages = rdata->nr_pages,
1819 .rq_pagesz = rdata->pagesz,
1820 .rq_tailsz = rdata->tailsz };
09a4707e 1821
f96637be
JP		 1822 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1823 __func__, mid->mid, mid->mid_state, rdata->result,
1824 rdata->bytes);
09a4707e
PS		 1825
1826 switch (mid->mid_state) {
1827 case MID_RESPONSE_RECEIVED:
1828 credits_received = le16_to_cpu(buf->CreditRequest);
1829 /* result already set, check signature */
38d77c50 1830 if (server->sign) {
3c1bf7e4
PS		 1831 int rc;
1832
0b688cfc 1833 rc = smb2_verify_signature(&rqst, server);
3c1bf7e4 1834 if (rc)
f96637be
JP		 1835 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
1836 rc);
3c1bf7e4 1837 }
09a4707e 1838 /* FIXME: should this be counted toward the initiating task? */
34a54d61
PS		 1839 task_io_account_read(rdata->got_bytes);
1840 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 1841 break;
1842 case MID_REQUEST_SUBMITTED:
1843 case MID_RETRY_NEEDED:
1844 rdata->result = -EAGAIN;
d913ed17
PS		 1845 if (server->sign && rdata->got_bytes)
1846 /* reset bytes number since we can not check a sign */
1847 rdata->got_bytes = 0;
1848 /* FIXME: should this be counted toward the initiating task? */
1849 task_io_account_read(rdata->got_bytes);
1850 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 1851 break;
1852 default:
1853 if (rdata->result != -ENODATA)
1854 rdata->result = -EIO;
1855 }
1856
1857 if (rdata->result)
1858 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
1859
1860 queue_work(cifsiod_wq, &rdata->work);
5fb4e288 1861 mutex_lock(&server->srv_mutex);
09a4707e 1862 DeleteMidQEntry(mid);
5fb4e288 1863 mutex_unlock(&server->srv_mutex);
09a4707e
PS		 1864 add_credits(server, credits_received, 0);
1865}
1866
1867/* smb2_async_readv - send an async write, and set up mid to handle result */
1868int
1869smb2_async_readv(struct cifs_readdata *rdata)
1870{
bed9da02 1871 int rc, flags = 0;
09a4707e
PS		 1872 struct smb2_hdr *buf;
1873 struct cifs_io_parms io_parms;
5819575e 1874 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
fec344e3 1875 .rq_nvec = 1 };
bed9da02 1876 struct TCP_Server_Info *server;
09a4707e 1877
f96637be
JP		 1878 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
1879 __func__, rdata->offset, rdata->bytes);
09a4707e
PS		 1880
1881 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
1882 io_parms.offset = rdata->offset;
1883 io_parms.length = rdata->bytes;
1884 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
1885 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
1886 io_parms.pid = rdata->pid;
bed9da02
PS		 1887
1888 server = io_parms.tcon->ses->server;
1889
5819575e 1890 rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0);
bed9da02
PS		 1891 if (rc) {
1892 if (rc == -EAGAIN && rdata->credits) {
1893 /* credits was reset by reconnect */
1894 rdata->credits = 0;
1895 /* reduce in_flight value since we won't send the req */
1896 spin_lock(&server->req_lock);
1897 server->in_flight--;
1898 spin_unlock(&server->req_lock);
1899 }
09a4707e 1900 return rc;
bed9da02 1901 }
09a4707e 1902
5819575e 1903 buf = (struct smb2_hdr *)rdata->iov.iov_base;
09a4707e 1904 /* 4 for rfc1002 length field */
5819575e 1905 rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4;
09a4707e 1906
bed9da02
PS		 1907 if (rdata->credits) {
1908 buf->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
1909 SMB2_MAX_BUFFER_SIZE));
1910 spin_lock(&server->req_lock);
1911 server->credits += rdata->credits -
1912 le16_to_cpu(buf->CreditCharge);
1913 spin_unlock(&server->req_lock);
1914 wake_up(&server->request_q);
1915 flags = CIFS_HAS_CREDITS;
1916 }
1917
09a4707e 1918 kref_get(&rdata->refcount);
fec344e3 1919 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
09a4707e 1920 cifs_readv_receive, smb2_readv_callback,
bed9da02 1921 rdata, flags);
e5d04887 1922 if (rc) {
09a4707e 1923 kref_put(&rdata->refcount, cifs_readdata_release);
e5d04887
PS		 1924 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
1925 }
09a4707e
PS		 1926
1927 cifs_small_buf_release(buf);
1928 return rc;
1929}
33319141 1930
d8e05039
PS		 1931int
1932SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
1933 unsigned int *nbytes, char **buf, int *buf_type)
1934{
1935 int resp_buftype, rc = -EACCES;
1936 struct smb2_read_rsp *rsp = NULL;
1937 struct kvec iov[1];
1938
1939 *nbytes = 0;
1940 rc = smb2_new_read_req(iov, io_parms, 0, 0);
1941 if (rc)
1942 return rc;
1943
1944 rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1,
1945 &resp_buftype, CIFS_LOG_ERROR);
1946
1947 rsp = (struct smb2_read_rsp *)iov[0].iov_base;
1948
1949 if (rsp->hdr.Status == STATUS_END_OF_FILE) {
1950 free_rsp_buf(resp_buftype, iov[0].iov_base);
1951 return 0;
1952 }
1953
1954 if (rc) {
1955 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
f96637be 1956 cifs_dbg(VFS, "Send error in read = %d\n", rc);
d8e05039
PS		 1957 } else {
1958 *nbytes = le32_to_cpu(rsp->DataLength);
1959 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
1960 (*nbytes > io_parms->length)) {
f96637be
JP		 1961 cifs_dbg(FYI, "bad length %d for count %d\n",
1962 *nbytes, io_parms->length);
d8e05039
PS		 1963 rc = -EIO;
1964 *nbytes = 0;
1965 }
1966 }
1967
1968 if (*buf) {
1969 memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset,
1970 *nbytes);
1971 free_rsp_buf(resp_buftype, iov[0].iov_base);
1972 } else if (resp_buftype != CIFS_NO_BUFFER) {
1973 *buf = iov[0].iov_base;
1974 if (resp_buftype == CIFS_SMALL_BUFFER)
1975 *buf_type = CIFS_SMALL_BUFFER;
1976 else if (resp_buftype == CIFS_LARGE_BUFFER)
1977 *buf_type = CIFS_LARGE_BUFFER;
1978 }
1979 return rc;
1980}
1981
33319141
PS		 1982/*
1983 * Check the mid_state and signature on received buffer (if any), and queue the
1984 * workqueue completion task.
1985 */
1986static void
1987smb2_writev_callback(struct mid_q_entry *mid)
1988{
1989 struct cifs_writedata *wdata = mid->callback_data;
1990 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
5fb4e288 1991 struct TCP_Server_Info *server = tcon->ses->server;
33319141
PS		 1992 unsigned int written;
1993 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
1994 unsigned int credits_received = 1;
1995
1996 switch (mid->mid_state) {
1997 case MID_RESPONSE_RECEIVED:
1998 credits_received = le16_to_cpu(rsp->hdr.CreditRequest);
1999 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
2000 if (wdata->result != 0)
2001 break;
2002
2003 written = le32_to_cpu(rsp->DataLength);
2004 /*
2005 * Mask off high 16 bits when bytes written as returned
2006 * by the server is greater than bytes requested by the
2007 * client. OS/2 servers are known to set incorrect
2008 * CountHigh values.
2009 */
2010 if (written > wdata->bytes)
2011 written &= 0xFFFF;
2012
2013 if (written < wdata->bytes)
2014 wdata->result = -ENOSPC;
2015 else
2016 wdata->bytes = written;
2017 break;
2018 case MID_REQUEST_SUBMITTED:
2019 case MID_RETRY_NEEDED:
2020 wdata->result = -EAGAIN;
2021 break;
2022 default:
2023 wdata->result = -EIO;
2024 break;
2025 }
2026
2027 if (wdata->result)
2028 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2029
2030 queue_work(cifsiod_wq, &wdata->work);
5fb4e288 2031 mutex_lock(&server->srv_mutex);
33319141 2032 DeleteMidQEntry(mid);
5fb4e288 2033 mutex_unlock(&server->srv_mutex);
33319141
PS		 2034 add_credits(tcon->ses->server, credits_received, 0);
2035}
2036
2037/* smb2_async_writev - send an async write, and set up mid to handle result */
2038int
4a5c80d7
SF		 2039smb2_async_writev(struct cifs_writedata *wdata,
2040 void (*release)(struct kref *kref))
33319141 2041{
cb7e9eab 2042 int rc = -EACCES, flags = 0;
33319141
PS		 2043 struct smb2_write_req *req = NULL;
2044 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
cb7e9eab 2045 struct TCP_Server_Info *server = tcon->ses->server;
eddb079d 2046 struct kvec iov;
fec344e3 2047 struct smb_rqst rqst;
33319141
PS		 2048
2049 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
cb7e9eab
PS		 2050 if (rc) {
2051 if (rc == -EAGAIN && wdata->credits) {
2052 /* credits was reset by reconnect */
2053 wdata->credits = 0;
2054 /* reduce in_flight value since we won't send the req */
2055 spin_lock(&server->req_lock);
2056 server->in_flight--;
2057 spin_unlock(&server->req_lock);
2058 }
33319141 2059 goto async_writev_out;
cb7e9eab 2060 }
33319141 2061
33319141
PS		 2062 req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid);
2063
2064 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
2065 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
2066 req->WriteChannelInfoOffset = 0;
2067 req->WriteChannelInfoLength = 0;
2068 req->Channel = 0;
2069 req->Offset = cpu_to_le64(wdata->offset);
2070 /* 4 for rfc1002 length field */
2071 req->DataOffset = cpu_to_le16(
2072 offsetof(struct smb2_write_req, Buffer) - 4);
2073 req->RemainingBytes = 0;
2074
2075 /* 4 for rfc1002 length field and 1 for Buffer */
eddb079d
JL		 2076 iov.iov_len = get_rfc1002_length(req) + 4 - 1;
2077 iov.iov_base = req;
33319141 2078
eddb079d
JL		 2079 rqst.rq_iov = &iov;
2080 rqst.rq_nvec = 1;
2081 rqst.rq_pages = wdata->pages;
2082 rqst.rq_npages = wdata->nr_pages;
2083 rqst.rq_pagesz = wdata->pagesz;
2084 rqst.rq_tailsz = wdata->tailsz;
33319141 2085
f96637be
JP		 2086 cifs_dbg(FYI, "async write at %llu %u bytes\n",
2087 wdata->offset, wdata->bytes);
33319141
PS		 2088
2089 req->Length = cpu_to_le32(wdata->bytes);
2090
2091 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
2092
cb7e9eab
PS		 2093 if (wdata->credits) {
2094 req->hdr.CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
2095 SMB2_MAX_BUFFER_SIZE));
2096 spin_lock(&server->req_lock);
2097 server->credits += wdata->credits -
2098 le16_to_cpu(req->hdr.CreditCharge);
2099 spin_unlock(&server->req_lock);
2100 wake_up(&server->request_q);
2101 flags = CIFS_HAS_CREDITS;
2102 }
2103
33319141 2104 kref_get(&wdata->refcount);
cb7e9eab
PS		 2105 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, wdata,
2106 flags);
33319141 2107
e5d04887 2108 if (rc) {
4a5c80d7 2109 kref_put(&wdata->refcount, release);
e5d04887
PS		 2110 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2111 }
33319141 2112
33319141
PS		 2113async_writev_out:
2114 cifs_small_buf_release(req);
33319141
PS		 2115 return rc;
2116}
009d3443
PS		 2117
2118/*
2119 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2120 * The length field from io_parms must be at least 1 and indicates a number of
2121 * elements with data to write that begins with position 1 in iov array. All
2122 * data length is specified by count.
2123 */
2124int
2125SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
2126 unsigned int *nbytes, struct kvec *iov, int n_vec)
2127{
2128 int rc = 0;
2129 struct smb2_write_req *req = NULL;
2130 struct smb2_write_rsp *rsp = NULL;
2131 int resp_buftype;
2132 *nbytes = 0;
2133
2134 if (n_vec < 1)
2135 return rc;
2136
2137 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
2138 if (rc)
2139 return rc;
2140
2141 if (io_parms->tcon->ses->server == NULL)
2142 return -ECONNABORTED;
2143
2144 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
2145
2146 req->PersistentFileId = io_parms->persistent_fid;
2147 req->VolatileFileId = io_parms->volatile_fid;
2148 req->WriteChannelInfoOffset = 0;
2149 req->WriteChannelInfoLength = 0;
2150 req->Channel = 0;
2151 req->Length = cpu_to_le32(io_parms->length);
2152 req->Offset = cpu_to_le64(io_parms->offset);
2153 /* 4 for rfc1002 length field */
2154 req->DataOffset = cpu_to_le16(
2155 offsetof(struct smb2_write_req, Buffer) - 4);
2156 req->RemainingBytes = 0;
2157
2158 iov[0].iov_base = (char *)req;
2159 /* 4 for rfc1002 length field and 1 for Buffer */
2160 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2161
2162 /* length of entire message including data to be written */
2163 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
2164
2165 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
2166 &resp_buftype, 0);
e5d04887 2167 rsp = (struct smb2_write_rsp *)iov[0].iov_base;
009d3443
PS		 2168
2169 if (rc) {
2170 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
f96637be 2171 cifs_dbg(VFS, "Send error in write = %d\n", rc);
e5d04887 2172 } else
009d3443 2173 *nbytes = le32_to_cpu(rsp->DataLength);
e5d04887
PS		 2174
2175 free_rsp_buf(resp_buftype, rsp);
009d3443
PS		 2176 return rc;
2177}
35143eb5 2178
d324f08d
PS		 2179static unsigned int
2180num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
2181{
2182 int len;
2183 unsigned int entrycount = 0;
2184 unsigned int next_offset = 0;
2185 FILE_DIRECTORY_INFO *entryptr;
2186
2187 if (bufstart == NULL)
2188 return 0;
2189
2190 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
2191
2192 while (1) {
2193 entryptr = (FILE_DIRECTORY_INFO *)
2194 ((char *)entryptr + next_offset);
2195
2196 if ((char *)entryptr + size > end_of_buf) {
f96637be 2197 cifs_dbg(VFS, "malformed search entry would overflow\n");
d324f08d
PS		 2198 break;
2199 }
2200
2201 len = le32_to_cpu(entryptr->FileNameLength);
2202 if ((char *)entryptr + len + size > end_of_buf) {
f96637be
JP		 2203 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
2204 end_of_buf);
d324f08d
PS		 2205 break;
2206 }
2207
2208 *lastentry = (char *)entryptr;
2209 entrycount++;
2210
2211 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
2212 if (!next_offset)
2213 break;
2214 }
2215
2216 return entrycount;
2217}
2218
2219/*
2220 * Readdir/FindFirst
2221 */
2222int
2223SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
2224 u64 persistent_fid, u64 volatile_fid, int index,
2225 struct cifs_search_info *srch_inf)
2226{
2227 struct smb2_query_directory_req *req;
2228 struct smb2_query_directory_rsp *rsp = NULL;
2229 struct kvec iov[2];
2230 int rc = 0;
2231 int len;
75fdfc84 2232 int resp_buftype = CIFS_NO_BUFFER;
d324f08d
PS		 2233 unsigned char *bufptr;
2234 struct TCP_Server_Info *server;
2235 struct cifs_ses *ses = tcon->ses;
2236 __le16 asteriks = cpu_to_le16('*');
2237 char *end_of_smb;
2238 unsigned int output_size = CIFSMaxBufSize;
2239 size_t info_buf_size;
2240
2241 if (ses && (ses->server))
2242 server = ses->server;
2243 else
2244 return -EIO;
2245
2246 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
2247 if (rc)
2248 return rc;
2249
2250 switch (srch_inf->info_level) {
2251 case SMB_FIND_FILE_DIRECTORY_INFO:
2252 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
2253 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
2254 break;
2255 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
2256 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
2257 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
2258 break;
2259 default:
f96637be
JP		 2260 cifs_dbg(VFS, "info level %u isn't supported\n",
2261 srch_inf->info_level);
d324f08d
PS		 2262 rc = -EINVAL;
2263 goto qdir_exit;
2264 }
2265
2266 req->FileIndex = cpu_to_le32(index);
2267 req->PersistentFileId = persistent_fid;
2268 req->VolatileFileId = volatile_fid;
2269
2270 len = 0x2;
2271 bufptr = req->Buffer;
2272 memcpy(bufptr, &asteriks, len);
2273
2274 req->FileNameOffset =
2275 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
2276 req->FileNameLength = cpu_to_le16(len);
2277 /*
2278 * BB could be 30 bytes or so longer if we used SMB2 specific
2279 * buffer lengths, but this is safe and close enough.
2280 */
2281 output_size = min_t(unsigned int, output_size, server->maxBuf);
2282 output_size = min_t(unsigned int, output_size, 2 << 15);
2283 req->OutputBufferLength = cpu_to_le32(output_size);
2284
2285 iov[0].iov_base = (char *)req;
2286 /* 4 for RFC1001 length and 1 for Buffer */
2287 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2288
2289 iov[1].iov_base = (char *)(req->Buffer);
2290 iov[1].iov_len = len;
2291
2292 inc_rfc1001_len(req, len - 1 /* Buffer */);
2293
2294 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
e5d04887
PS		 2295 rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base;
2296
d324f08d 2297 if (rc) {
52755808
PS		 2298 if (rc == -ENODATA && rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2299 srch_inf->endOfSearch = true;
2300 rc = 0;
2301 }
d324f08d
PS		 2302 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
2303 goto qdir_exit;
2304 }
d324f08d
PS		 2305
2306 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2307 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2308 info_buf_size);
2309 if (rc)
2310 goto qdir_exit;
2311
2312 srch_inf->unicode = true;
2313
2314 if (srch_inf->ntwrk_buf_start) {
2315 if (srch_inf->smallBuf)
2316 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
2317 else
2318 cifs_buf_release(srch_inf->ntwrk_buf_start);
2319 }
2320 srch_inf->ntwrk_buf_start = (char *)rsp;
2321 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
2322 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
2323 /* 4 for rfc1002 length field */
2324 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
2325 srch_inf->entries_in_buffer =
2326 num_entries(srch_inf->srch_entries_start, end_of_smb,
2327 &srch_inf->last_entry, info_buf_size);
2328 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
f96637be
JP		 2329 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
2330 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
2331 srch_inf->srch_entries_start, srch_inf->last_entry);
d324f08d
PS		 2332 if (resp_buftype == CIFS_LARGE_BUFFER)
2333 srch_inf->smallBuf = false;
2334 else if (resp_buftype == CIFS_SMALL_BUFFER)
2335 srch_inf->smallBuf = true;
2336 else
f96637be 2337 cifs_dbg(VFS, "illegal search buffer type\n");
d324f08d 2338
d324f08d
PS		 2339 return rc;
2340
2341qdir_exit:
2342 free_rsp_buf(resp_buftype, rsp);
2343 return rc;
2344}
2345
35143eb5
PS		 2346static int
2347send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
c839ff24 2348 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
35143eb5
PS		 2349 unsigned int num, void **data, unsigned int *size)
2350{
2351 struct smb2_set_info_req *req;
2352 struct smb2_set_info_rsp *rsp = NULL;
2353 struct kvec *iov;
2354 int rc = 0;
2355 int resp_buftype;
2356 unsigned int i;
2357 struct TCP_Server_Info *server;
2358 struct cifs_ses *ses = tcon->ses;
2359
2360 if (ses && (ses->server))
2361 server = ses->server;
2362 else
2363 return -EIO;
2364
2365 if (!num)
2366 return -EINVAL;
2367
2368 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
2369 if (!iov)
2370 return -ENOMEM;
2371
2372 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
2373 if (rc) {
2374 kfree(iov);
2375 return rc;
2376 }
2377
c839ff24
PS		 2378 req->hdr.ProcessId = cpu_to_le32(pid);
2379
35143eb5
PS		 2380 req->InfoType = SMB2_O_INFO_FILE;
2381 req->FileInfoClass = info_class;
2382 req->PersistentFileId = persistent_fid;
2383 req->VolatileFileId = volatile_fid;
2384
2385 /* 4 for RFC1001 length and 1 for Buffer */
2386 req->BufferOffset =
2387 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
2388 req->BufferLength = cpu_to_le32(*size);
2389
2390 inc_rfc1001_len(req, *size - 1 /* Buffer */);
2391
2392 memcpy(req->Buffer, *data, *size);
2393
2394 iov[0].iov_base = (char *)req;
2395 /* 4 for RFC1001 length */
2396 iov[0].iov_len = get_rfc1002_length(req) + 4;
2397
2398 for (i = 1; i < num; i++) {
2399 inc_rfc1001_len(req, size[i]);
2400 le32_add_cpu(&req->BufferLength, size[i]);
2401 iov[i].iov_base = (char *)data[i];
2402 iov[i].iov_len = size[i];
2403 }
2404
2405 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0);
2406 rsp = (struct smb2_set_info_rsp *)iov[0].iov_base;
2407
7d3fb24b 2408 if (rc != 0)
35143eb5 2409 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
7d3fb24b 2410
35143eb5
PS		 2411 free_rsp_buf(resp_buftype, rsp);
2412 kfree(iov);
2413 return rc;
2414}
2415
2416int
2417SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
2418 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2419{
2420 struct smb2_file_rename_info info;
2421 void **data;
2422 unsigned int size[2];
2423 int rc;
2424 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2425
2426 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2427 if (!data)
2428 return -ENOMEM;
2429
2430 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
2431 /* 0 = fail if target already exists */
2432 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2433 info.FileNameLength = cpu_to_le32(len);
2434
2435 data[0] = &info;
2436 size[0] = sizeof(struct smb2_file_rename_info);
2437
2438 data[1] = target_file;
2439 size[1] = len + 2 /* null */;
2440
2441 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
c839ff24
PS		 2442 current->tgid, FILE_RENAME_INFORMATION, 2, data,
2443 size);
35143eb5
PS		 2444 kfree(data);
2445 return rc;
2446}
568798cc
PS		 2447
2448int
2449SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
2450 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2451{
2452 struct smb2_file_link_info info;
2453 void **data;
2454 unsigned int size[2];
2455 int rc;
2456 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2457
2458 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2459 if (!data)
2460 return -ENOMEM;
2461
2462 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
2463 /* 0 = fail if link already exists */
2464 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2465 info.FileNameLength = cpu_to_le32(len);
2466
2467 data[0] = &info;
2468 size[0] = sizeof(struct smb2_file_link_info);
2469
2470 data[1] = target_file;
2471 size[1] = len + 2 /* null */;
2472
2473 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
c839ff24 2474 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
568798cc
PS		 2475 kfree(data);
2476 return rc;
2477}
c839ff24
PS		 2478
2479int
2480SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
f29ebb47 2481 u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc)
c839ff24
PS		 2482{
2483 struct smb2_file_eof_info info;
2484 void *data;
2485 unsigned int size;
2486
2487 info.EndOfFile = *eof;
2488
2489 data = &info;
2490 size = sizeof(struct smb2_file_eof_info);
2491
f29ebb47
SF		 2492 if (is_falloc)
2493 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2494 pid, FILE_ALLOCATION_INFORMATION, 1, &data, &size);
2495 else
2496 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2497 pid, FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
c839ff24 2498}
1feeaac7
PS		 2499
2500int
2501SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2502 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
2503{
2504 unsigned int size;
2505 size = sizeof(FILE_BASIC_INFO);
2506 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2507 current->tgid, FILE_BASIC_INFORMATION, 1,
2508 (void **)&buf, &size);
2509}
983c88a4
PS		 2510
2511int
2512SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
2513 const u64 persistent_fid, const u64 volatile_fid,
2514 __u8 oplock_level)
2515{
2516 int rc;
2517 struct smb2_oplock_break *req = NULL;
2518
f96637be 2519 cifs_dbg(FYI, "SMB2_oplock_break\n");
983c88a4
PS		 2520 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2521
2522 if (rc)
2523 return rc;
2524
2525 req->VolatileFid = volatile_fid;
2526 req->PersistentFid = persistent_fid;
2527 req->OplockLevel = oplock_level;
2528 req->hdr.CreditRequest = cpu_to_le16(1);
2529
2530 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2531 /* SMB2 buffer freed by function above */
2532
2533 if (rc) {
2534 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 2535 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
983c88a4
PS		 2536 }
2537
2538 return rc;
2539}
6fc05c25
PS		 2540
2541static void
2542copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
2543 struct kstatfs *kst)
2544{
2545 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
2546 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
2547 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
2548 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
2549 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
2550 return;
2551}
2552
2553static int
2554build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
2555 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
2556{
2557 int rc;
2558 struct smb2_query_info_req *req;
2559
f96637be 2560 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
6fc05c25
PS		 2561
2562 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
2563 return -EIO;
2564
2565 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2566 if (rc)
2567 return rc;
2568
2569 req->InfoType = SMB2_O_INFO_FILESYSTEM;
2570 req->FileInfoClass = level;
2571 req->PersistentFileId = persistent_fid;
2572 req->VolatileFileId = volatile_fid;
2573 /* 4 for rfc1002 length field and 1 for pad */
2574 req->InputBufferOffset =
2575 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
2576 req->OutputBufferLength = cpu_to_le32(
2577 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
2578
2579 iov->iov_base = (char *)req;
2580 /* 4 for rfc1002 length field */
2581 iov->iov_len = get_rfc1002_length(req) + 4;
2582 return 0;
2583}
2584
2585int
2586SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
2587 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
2588{
2589 struct smb2_query_info_rsp *rsp = NULL;
2590 struct kvec iov;
2591 int rc = 0;
2592 int resp_buftype;
2593 struct cifs_ses *ses = tcon->ses;
2594 struct smb2_fs_full_size_info *info = NULL;
2595
2596 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
2597 sizeof(struct smb2_fs_full_size_info),
2598 persistent_fid, volatile_fid);
2599 if (rc)
2600 return rc;
2601
2602 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2603 if (rc) {
2604 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
34f62640 2605 goto qfsinf_exit;
6fc05c25
PS		 2606 }
2607 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2608
2609 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
2610 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
2611 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2612 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2613 sizeof(struct smb2_fs_full_size_info));
2614 if (!rc)
2615 copy_fs_info_to_kstatfs(info, fsdata);
2616
34f62640
SF		 2617qfsinf_exit:
2618 free_rsp_buf(resp_buftype, iov.iov_base);
2619 return rc;
2620}
2621
2622int
2623SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2167114c 2624 u64 persistent_fid, u64 volatile_fid, int level)
34f62640
SF		 2625{
2626 struct smb2_query_info_rsp *rsp = NULL;
2627 struct kvec iov;
2628 int rc = 0;
2167114c 2629 int resp_buftype, max_len, min_len;
34f62640
SF		 2630 struct cifs_ses *ses = tcon->ses;
2631 unsigned int rsp_len, offset;
2632
2167114c
SF		 2633 if (level == FS_DEVICE_INFORMATION) {
2634 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2635 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2636 } else if (level == FS_ATTRIBUTE_INFORMATION) {
2637 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
2638 min_len = MIN_FS_ATTR_INFO_SIZE;
af6a12ea
SF		 2639 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
2640 max_len = sizeof(struct smb3_fs_ss_info);
2641 min_len = sizeof(struct smb3_fs_ss_info);
2167114c 2642 } else {
af6a12ea 2643 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2167114c
SF		 2644 return -EINVAL;
2645 }
2646
2647 rc = build_qfs_info_req(&iov, tcon, level, max_len,
34f62640
SF		 2648 persistent_fid, volatile_fid);
2649 if (rc)
2650 return rc;
2651
2652 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2653 if (rc) {
2654 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2655 goto qfsattr_exit;
2656 }
2657 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2658
2659 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
2660 offset = le16_to_cpu(rsp->OutputBufferOffset);
2167114c
SF		 2661 rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
2662 if (rc)
2663 goto qfsattr_exit;
2664
2665 if (level == FS_ATTRIBUTE_INFORMATION)
34f62640
SF		 2666 memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
2667 + (char *)&rsp->hdr, min_t(unsigned int,
2167114c
SF		 2668 rsp_len, max_len));
2669 else if (level == FS_DEVICE_INFORMATION)
2670 memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
2671 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
af6a12ea
SF		 2672 else if (level == FS_SECTOR_SIZE_INFORMATION) {
2673 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
2674 (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
2675 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
2676 tcon->perf_sector_size =
2677 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
2678 }
34f62640
SF		 2679
2680qfsattr_exit:
6fc05c25
PS		 2681 free_rsp_buf(resp_buftype, iov.iov_base);
2682 return rc;
2683}
f7ba7fe6
PS		 2684
2685int
2686smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
2687 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2688 const __u32 num_lock, struct smb2_lock_element *buf)
2689{
2690 int rc = 0;
2691 struct smb2_lock_req *req = NULL;
2692 struct kvec iov[2];
2693 int resp_buf_type;
2694 unsigned int count;
2695
f96637be 2696 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
f7ba7fe6
PS		 2697
2698 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
2699 if (rc)
2700 return rc;
2701
2702 req->hdr.ProcessId = cpu_to_le32(pid);
2703 req->LockCount = cpu_to_le16(num_lock);
2704
2705 req->PersistentFileId = persist_fid;
2706 req->VolatileFileId = volatile_fid;
2707
2708 count = num_lock * sizeof(struct smb2_lock_element);
2709 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
2710
2711 iov[0].iov_base = (char *)req;
2712 /* 4 for rfc1002 length field and count for all locks */
2713 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
2714 iov[1].iov_base = (char *)buf;
2715 iov[1].iov_len = count;
2716
2717 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
2718 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP);
2719 if (rc) {
f96637be 2720 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
f7ba7fe6
PS		 2721 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
2722 }
2723
2724 return rc;
2725}
2726
2727int
2728SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
2729 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2730 const __u64 length, const __u64 offset, const __u32 lock_flags,
2731 const bool wait)
2732{
2733 struct smb2_lock_element lock;
2734
2735 lock.Offset = cpu_to_le64(offset);
2736 lock.Length = cpu_to_le64(length);
2737 lock.Flags = cpu_to_le32(lock_flags);
2738 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
2739 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
2740
2741 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
2742}
0822f514
PS		 2743
2744int
2745SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
2746 __u8 *lease_key, const __le32 lease_state)
2747{
2748 int rc;
2749 struct smb2_lease_ack *req = NULL;
2750
f96637be 2751 cifs_dbg(FYI, "SMB2_lease_break\n");
0822f514
PS		 2752 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2753
2754 if (rc)
2755 return rc;
2756
2757 req->hdr.CreditRequest = cpu_to_le16(1);
2758 req->StructureSize = cpu_to_le16(36);
2759 inc_rfc1001_len(req, 12);
2760
2761 memcpy(req->LeaseKey, lease_key, 16);
2762 req->LeaseState = lease_state;
2763
2764 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2765 /* SMB2 buffer freed by function above */
2766
2767 if (rc) {
2768 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 2769 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
0822f514
PS		 2770 }
2771
2772 return rc;
2773}
Linux kernel - Deliverables
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