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Set previous session id correctly on SMB3 reconnect
[mirror_ubuntu-zesty-kernel.git] / fs / cifs / smb2pdu.c
CommitLineData
ec2e4523
PS		 1/*
2 * fs/cifs/smb2pdu.c
3 *
2b80d049 4 * Copyright (C) International Business Machines Corp., 2009, 2013
ec2e4523
PS		 5 * Etersoft, 2012
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
8 *
9 * Contains the routines for constructing the SMB2 PDUs themselves
10 *
11 * This library is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published
13 * by the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
15 *
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
19 * the GNU Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 */
25
26 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
27 /* Note that there are handle based routines which must be */
28 /* treated slightly differently for reconnection purposes since we never */
29 /* want to reuse a stale file handle and only the caller knows the file info */
30
31#include <linux/fs.h>
32#include <linux/kernel.h>
33#include <linux/vfs.h>
09a4707e 34#include <linux/task_io_accounting_ops.h>
ec2e4523 35#include <linux/uaccess.h>
33319141 36#include <linux/pagemap.h>
ec2e4523
PS		 37#include <linux/xattr.h>
38#include "smb2pdu.h"
39#include "cifsglob.h"
40#include "cifsacl.h"
41#include "cifsproto.h"
42#include "smb2proto.h"
43#include "cifs_unicode.h"
44#include "cifs_debug.h"
45#include "ntlmssp.h"
46#include "smb2status.h"
09a4707e 47#include "smb2glob.h"
d324f08d 48#include "cifspdu.h"
ceb1b0b9 49#include "cifs_spnego.h"
ec2e4523
PS		 50
51/*
52 * The following table defines the expected "StructureSize" of SMB2 requests
53 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
54 *
55 * Note that commands are defined in smb2pdu.h in le16 but the array below is
56 * indexed by command in host byte order.
57 */
58static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
59 /* SMB2_NEGOTIATE */ 36,
60 /* SMB2_SESSION_SETUP */ 25,
61 /* SMB2_LOGOFF */ 4,
62 /* SMB2_TREE_CONNECT */ 9,
63 /* SMB2_TREE_DISCONNECT */ 4,
64 /* SMB2_CREATE */ 57,
65 /* SMB2_CLOSE */ 24,
66 /* SMB2_FLUSH */ 24,
67 /* SMB2_READ */ 49,
68 /* SMB2_WRITE */ 49,
69 /* SMB2_LOCK */ 48,
70 /* SMB2_IOCTL */ 57,
71 /* SMB2_CANCEL */ 4,
72 /* SMB2_ECHO */ 4,
73 /* SMB2_QUERY_DIRECTORY */ 33,
74 /* SMB2_CHANGE_NOTIFY */ 32,
75 /* SMB2_QUERY_INFO */ 41,
76 /* SMB2_SET_INFO */ 33,
77 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
78};
79
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;
c0432fc7
RL		 106 if (tcon && tcon->ses && tcon->ses->server) {
107 struct TCP_Server_Info *server = tcon->ses->server;
108
109 spin_lock(&server->req_lock);
110 /* Request up to 2 credits but don't go over the limit. */
111 if (server->credits >= SMB2_MAX_CREDITS_AVAILABLE)
112 hdr->CreditRequest = cpu_to_le16(0);
113 else
114 hdr->CreditRequest = cpu_to_le16(
115 min_t(int, SMB2_MAX_CREDITS_AVAILABLE -
116 server->credits, 2));
117 spin_unlock(&server->req_lock);
118 } else {
119 hdr->CreditRequest = cpu_to_le16(2);
120 }
ec2e4523
PS		 121 hdr->ProcessId = cpu_to_le32((__u16)current->tgid);
122
123 if (!tcon)
124 goto out;
125
2b80d049
SF		 126 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
127 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
1dc92c45 128 if ((tcon->ses) && (tcon->ses->server) &&
84ceeb96 129 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
2b80d049
SF		 130 hdr->CreditCharge = cpu_to_le16(1);
131 /* else CreditCharge MBZ */
132
ec2e4523
PS		 133 hdr->TreeId = tcon->tid;
134 /* Uid is not converted */
135 if (tcon->ses)
136 hdr->SessionId = tcon->ses->Suid;
f87ab88b
SF		 137
138 /*
139 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
140 * to pass the path on the Open SMB prefixed by \\server\share.
141 * Not sure when we would need to do the augmented path (if ever) and
142 * setting this flag breaks the SMB2 open operation since it is
143 * illegal to send an empty path name (without \\server\share prefix)
144 * when the DFS flag is set in the SMB open header. We could
145 * consider setting the flag on all operations other than open
146 * but it is safer to net set it for now.
147 */
148/* if (tcon->share_flags & SHI1005_FLAGS_DFS)
149 hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
150
38d77c50 151 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign)
3c1bf7e4 152 hdr->Flags |= SMB2_FLAGS_SIGNED;
ec2e4523
PS		 153out:
154 pdu->StructureSize2 = cpu_to_le16(parmsize);
155 return;
156}
157
158static int
159smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
160{
161 int rc = 0;
aa24d1e9
PS		 162 struct nls_table *nls_codepage;
163 struct cifs_ses *ses;
164 struct TCP_Server_Info *server;
165
166 /*
167 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
168 * check for tcp and smb session status done differently
169 * for those three - in the calling routine.
170 */
171 if (tcon == NULL)
172 return rc;
173
174 if (smb2_command == SMB2_TREE_CONNECT)
175 return rc;
176
177 if (tcon->tidStatus == CifsExiting) {
178 /*
179 * only tree disconnect, open, and write,
180 * (and ulogoff which does not have tcon)
181 * are allowed as we start force umount.
182 */
183 if ((smb2_command != SMB2_WRITE) &&
184 (smb2_command != SMB2_CREATE) &&
185 (smb2_command != SMB2_TREE_DISCONNECT)) {
f96637be
JP		 186 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
187 smb2_command);
aa24d1e9
PS		 188 return -ENODEV;
189 }
190 }
191 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
192 (!tcon->ses->server))
193 return -EIO;
194
195 ses = tcon->ses;
196 server = ses->server;
197
198 /*
199 * Give demultiplex thread up to 10 seconds to reconnect, should be
200 * greater than cifs socket timeout which is 7 seconds
201 */
202 while (server->tcpStatus == CifsNeedReconnect) {
203 /*
204 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
205 * here since they are implicitly done when session drops.
206 */
207 switch (smb2_command) {
208 /*
209 * BB Should we keep oplock break and add flush to exceptions?
210 */
211 case SMB2_TREE_DISCONNECT:
212 case SMB2_CANCEL:
213 case SMB2_CLOSE:
214 case SMB2_OPLOCK_BREAK:
215 return -EAGAIN;
216 }
217
218 wait_event_interruptible_timeout(server->response_q,
219 (server->tcpStatus != CifsNeedReconnect), 10 * HZ);
220
221 /* are we still trying to reconnect? */
222 if (server->tcpStatus != CifsNeedReconnect)
223 break;
224
225 /*
226 * on "soft" mounts we wait once. Hard mounts keep
227 * retrying until process is killed or server comes
228 * back on-line
229 */
230 if (!tcon->retry) {
f96637be 231 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
aa24d1e9
PS		 232 return -EHOSTDOWN;
233 }
234 }
235
236 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
237 return rc;
238
239 nls_codepage = load_nls_default();
240
241 /*
242 * need to prevent multiple threads trying to simultaneously reconnect
243 * the same SMB session
244 */
245 mutex_lock(&tcon->ses->session_mutex);
246 rc = cifs_negotiate_protocol(0, tcon->ses);
247 if (!rc && tcon->ses->need_reconnect)
248 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
249
250 if (rc || !tcon->need_reconnect) {
251 mutex_unlock(&tcon->ses->session_mutex);
252 goto out;
253 }
254
255 cifs_mark_open_files_invalid(tcon);
256 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
257 mutex_unlock(&tcon->ses->session_mutex);
f96637be 258 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
aa24d1e9
PS		 259 if (rc)
260 goto out;
261 atomic_inc(&tconInfoReconnectCount);
aa24d1e9
PS		 262out:
263 /*
264 * Check if handle based operation so we know whether we can continue
265 * or not without returning to caller to reset file handle.
266 */
267 /*
268 * BB Is flush done by server on drop of tcp session? Should we special
269 * case it and skip above?
270 */
271 switch (smb2_command) {
272 case SMB2_FLUSH:
273 case SMB2_READ:
274 case SMB2_WRITE:
275 case SMB2_LOCK:
276 case SMB2_IOCTL:
277 case SMB2_QUERY_DIRECTORY:
278 case SMB2_CHANGE_NOTIFY:
279 case SMB2_QUERY_INFO:
280 case SMB2_SET_INFO:
281 return -EAGAIN;
282 }
283 unload_nls(nls_codepage);
ec2e4523
PS		 284 return rc;
285}
286
287/*
288 * Allocate and return pointer to an SMB request hdr, and set basic
289 * SMB information in the SMB header. If the return code is zero, this
290 * function must have filled in request_buf pointer.
291 */
292static int
293small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
294 void **request_buf)
295{
296 int rc = 0;
297
298 rc = smb2_reconnect(smb2_command, tcon);
299 if (rc)
300 return rc;
301
302 /* BB eventually switch this to SMB2 specific small buf size */
303 *request_buf = cifs_small_buf_get();
304 if (*request_buf == NULL) {
305 /* BB should we add a retry in here if not a writepage? */
306 return -ENOMEM;
307 }
308
309 smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon);
310
311 if (tcon != NULL) {
312#ifdef CONFIG_CIFS_STATS2
ec2e4523
PS		 313 uint16_t com_code = le16_to_cpu(smb2_command);
314 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
ec2e4523
PS		 315#endif
316 cifs_stats_inc(&tcon->num_smbs_sent);
317 }
318
319 return rc;
320}
321
ebb3a9d4
SF		 322#ifdef CONFIG_CIFS_SMB311
323/* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
324#define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
325
326
327#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
328#define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
329
330static void
331build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
332{
333 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
334 pneg_ctxt->DataLength = cpu_to_le16(38);
335 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
336 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
337 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
338 pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
339}
340
341static void
342build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
343{
344 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
345 pneg_ctxt->DataLength = cpu_to_le16(6);
346 pneg_ctxt->CipherCount = cpu_to_le16(2);
347 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
348 pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM;
349}
350
351static void
352assemble_neg_contexts(struct smb2_negotiate_req *req)
353{
354
355 /* +4 is to account for the RFC1001 len field */
356 char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT + 4;
357
358 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
359 /* Add 2 to size to round to 8 byte boundary */
360 pneg_ctxt += 2 + sizeof(struct smb2_preauth_neg_context);
361 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
362 req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
363 req->NegotiateContextCount = cpu_to_le16(2);
364 inc_rfc1001_len(req, 4 + sizeof(struct smb2_preauth_neg_context) + 2
365 + sizeof(struct smb2_encryption_neg_context)); /* calculate hash */
366}
367#else
368static void assemble_neg_contexts(struct smb2_negotiate_req *req)
369{
370 return;
371}
372#endif /* SMB311 */
373
374
ec2e4523
PS		 375/*
376 *
377 * SMB2 Worker functions follow:
378 *
379 * The general structure of the worker functions is:
380 * 1) Call smb2_init (assembles SMB2 header)
381 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
382 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
383 * 4) Decode SMB2 command specific fields in the fixed length area
384 * 5) Decode variable length data area (if any for this SMB2 command type)
385 * 6) Call free smb buffer
386 * 7) return
387 *
388 */
389
390int
391SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
392{
393 struct smb2_negotiate_req *req;
394 struct smb2_negotiate_rsp *rsp;
395 struct kvec iov[1];
396 int rc = 0;
397 int resp_buftype;
3534b850 398 struct TCP_Server_Info *server = ses->server;
ec2e4523
PS		 399 int blob_offset, blob_length;
400 char *security_blob;
401 int flags = CIFS_NEG_OP;
402
f96637be 403 cifs_dbg(FYI, "Negotiate protocol\n");
ec2e4523 404
3534b850
JL		 405 if (!server) {
406 WARN(1, "%s: server is NULL!\n", __func__);
407 return -EIO;
ec2e4523
PS		 408 }
409
410 rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
411 if (rc)
412 return rc;
413
ec2e4523
PS		 414 req->hdr.SessionId = 0;
415
e4aa25e7 416 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
ec2e4523 417
e4aa25e7
SF		 418 req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */
419 inc_rfc1001_len(req, 2);
ec2e4523
PS		 420
421 /* only one of SMB2 signing flags may be set in SMB2 request */
38d77c50 422 if (ses->sign)
9cd2e62c 423 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
38d77c50 424 else if (global_secflags & CIFSSEC_MAY_SIGN)
9cd2e62c 425 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
38d77c50
JL		 426 else
427 req->SecurityMode = 0;
ec2e4523 428
e4aa25e7 429 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
ec2e4523 430
3c5f9be1
SF		 431 /* ClientGUID must be zero for SMB2.02 dialect */
432 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
433 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
ebb3a9d4 434 else {
3c5f9be1
SF		 435 memcpy(req->ClientGUID, server->client_guid,
436 SMB2_CLIENT_GUID_SIZE);
ebb3a9d4
SF		 437 if (ses->server->vals->protocol_id == SMB311_PROT_ID)
438 assemble_neg_contexts(req);
439 }
ec2e4523
PS		 440 iov[0].iov_base = (char *)req;
441 /* 4 for rfc1002 length field */
442 iov[0].iov_len = get_rfc1002_length(req) + 4;
443
444 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags);
445
446 rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base;
447 /*
448 * No tcon so can't do
449 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
450 */
451 if (rc != 0)
452 goto neg_exit;
453
f96637be 454 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
ec2e4523 455
e4aa25e7
SF		 456 /* BB we may eventually want to match the negotiated vs. requested
457 dialect, even though we are only requesting one at a time */
458 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
f96637be 459 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
e4aa25e7 460 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
f96637be 461 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
e4aa25e7 462 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
f96637be 463 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
20b6d8b4
SF		 464 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
465 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
5f7fbf73
SF		 466#ifdef CONFIG_CIFS_SMB311
467 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
468 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
469#endif /* SMB311 */
ec2e4523 470 else {
f799d623 471 cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
f96637be 472 le16_to_cpu(rsp->DialectRevision));
ec2e4523
PS		 473 rc = -EIO;
474 goto neg_exit;
475 }
476 server->dialect = le16_to_cpu(rsp->DialectRevision);
477
e598d1d8
JL		 478 /* SMB2 only has an extended negflavor */
479 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
2365c4ea
PS		 480 /* set it to the maximum buffer size value we can send with 1 credit */
481 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
482 SMB2_MAX_BUFFER_SIZE);
ec2e4523
PS		 483 server->max_read = le32_to_cpu(rsp->MaxReadSize);
484 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
485 /* BB Do we need to validate the SecurityMode? */
486 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
487 server->capabilities = le32_to_cpu(rsp->Capabilities);
29e20f9c
PS		 488 /* Internal types */
489 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
ec2e4523
PS		 490
491 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
492 &rsp->hdr);
5d875cc9
SF		 493 /*
494 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
495 * for us will be
496 * ses->sectype = RawNTLMSSP;
497 * but for time being this is our only auth choice so doesn't matter.
498 * We just found a server which sets blob length to zero expecting raw.
499 */
500 if (blob_length == 0)
501 cifs_dbg(FYI, "missing security blob on negprot\n");
3c1bf7e4 502
38d77c50 503 rc = cifs_enable_signing(server, ses->sign);
9ddec561
JL		 504 if (rc)
505 goto neg_exit;
ceb1b0b9 506 if (blob_length) {
ebdd207e 507 rc = decode_negTokenInit(security_blob, blob_length, server);
ceb1b0b9
SF		 508 if (rc == 1)
509 rc = 0;
510 else if (rc == 0)
511 rc = -EIO;
ec2e4523 512 }
ec2e4523
PS		 513neg_exit:
514 free_rsp_buf(resp_buftype, rsp);
515 return rc;
516}
5478f9ba 517
ff1c038a
SF		 518int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
519{
520 int rc = 0;
521 struct validate_negotiate_info_req vneg_inbuf;
522 struct validate_negotiate_info_rsp *pneg_rsp;
523 u32 rsplen;
524
525 cifs_dbg(FYI, "validate negotiate\n");
526
527 /*
528 * validation ioctl must be signed, so no point sending this if we
529 * can not sign it. We could eventually change this to selectively
530 * sign just this, the first and only signed request on a connection.
531 * This is good enough for now since a user who wants better security
532 * would also enable signing on the mount. Having validation of
533 * negotiate info for signed connections helps reduce attack vectors
534 */
535 if (tcon->ses->server->sign == false)
536 return 0; /* validation requires signing */
537
538 vneg_inbuf.Capabilities =
539 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
39552ea8
SP		 540 memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid,
541 SMB2_CLIENT_GUID_SIZE);
ff1c038a
SF		 542
543 if (tcon->ses->sign)
544 vneg_inbuf.SecurityMode =
545 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
546 else if (global_secflags & CIFSSEC_MAY_SIGN)
547 vneg_inbuf.SecurityMode =
548 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
549 else
550 vneg_inbuf.SecurityMode = 0;
551
552 vneg_inbuf.DialectCount = cpu_to_le16(1);
553 vneg_inbuf.Dialects[0] =
554 cpu_to_le16(tcon->ses->server->vals->protocol_id);
555
556 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
557 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
558 (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
559 (char **)&pneg_rsp, &rsplen);
560
561 if (rc != 0) {
562 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
563 return -EIO;
564 }
565
566 if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
567 cifs_dbg(VFS, "invalid size of protocol negotiate response\n");
568 return -EIO;
569 }
570
571 /* check validate negotiate info response matches what we got earlier */
572 if (pneg_rsp->Dialect !=
573 cpu_to_le16(tcon->ses->server->vals->protocol_id))
574 goto vneg_out;
575
576 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
577 goto vneg_out;
578
579 /* do not validate server guid because not saved at negprot time yet */
580
581 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
582 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
583 goto vneg_out;
584
585 /* validate negotiate successful */
586 cifs_dbg(FYI, "validate negotiate info successful\n");
587 return 0;
588
589vneg_out:
590 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
591 return -EIO;
592}
593
5478f9ba
PS		 594int
595SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
596 const struct nls_table *nls_cp)
597{
598 struct smb2_sess_setup_req *req;
599 struct smb2_sess_setup_rsp *rsp = NULL;
600 struct kvec iov[2];
601 int rc = 0;
7de975e3 602 int resp_buftype = CIFS_NO_BUFFER;
5478f9ba 603 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
3534b850 604 struct TCP_Server_Info *server = ses->server;
5478f9ba 605 u16 blob_length = 0;
ceb1b0b9
SF		 606 struct key *spnego_key = NULL;
607 char *security_blob = NULL;
2afb8b21 608 unsigned char *ntlmssp_blob = NULL;
5478f9ba 609 bool use_spnego = false; /* else use raw ntlmssp */
c610a52d 610 u64 previous_session = ses->Suid;
5478f9ba 611
f96637be 612 cifs_dbg(FYI, "Session Setup\n");
5478f9ba 613
3534b850
JL		 614 if (!server) {
615 WARN(1, "%s: server is NULL!\n", __func__);
616 return -EIO;
5478f9ba
PS		 617 }
618
d4e63bd6
SP		 619 /*
620 * If we are here due to reconnect, free per-smb session key
621 * in case signing was required.
622 */
623 kfree(ses->auth_key.response);
624 ses->auth_key.response = NULL;
625
5478f9ba
PS		 626 /*
627 * If memory allocation is successful, caller of this function
628 * frees it.
629 */
630 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
631 if (!ses->ntlmssp)
632 return -ENOMEM;
5c234aa5 633 ses->ntlmssp->sesskey_per_smbsess = true;
5478f9ba 634
3f618223 635 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
ceb1b0b9
SF		 636 if (ses->sectype != Kerberos && ses->sectype != RawNTLMSSP)
637 ses->sectype = RawNTLMSSP;
5478f9ba
PS		 638
639ssetup_ntlmssp_authenticate:
640 if (phase == NtLmChallenge)
641 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
642
643 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
644 if (rc)
645 return rc;
646
5478f9ba 647 req->hdr.SessionId = 0; /* First session, not a reauthenticate */
c610a52d
SF		 648
649 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
650 req->PreviousSessionId = previous_session;
651
eed0e175 652 req->Flags = 0; /* MBZ */
5478f9ba
PS		 653 /* to enable echos and oplocks */
654 req->hdr.CreditRequest = cpu_to_le16(3);
655
656 /* only one of SMB2 signing flags may be set in SMB2 request */
38d77c50
JL		 657 if (server->sign)
658 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
659 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
660 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
661 else
662 req->SecurityMode = 0;
663
5478f9ba
PS		 664 req->Capabilities = 0;
665 req->Channel = 0; /* MBZ */
666
667 iov[0].iov_base = (char *)req;
668 /* 4 for rfc1002 length field and 1 for pad */
669 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
ceb1b0b9
SF		 670
671 if (ses->sectype == Kerberos) {
672#ifdef CONFIG_CIFS_UPCALL
673 struct cifs_spnego_msg *msg;
674
675 spnego_key = cifs_get_spnego_key(ses);
676 if (IS_ERR(spnego_key)) {
677 rc = PTR_ERR(spnego_key);
678 spnego_key = NULL;
679 goto ssetup_exit;
680 }
681
146aa8b1 682 msg = spnego_key->payload.data[0];
ceb1b0b9
SF		 683 /*
684 * check version field to make sure that cifs.upcall is
685 * sending us a response in an expected form
686 */
687 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
688 cifs_dbg(VFS,
689 "bad cifs.upcall version. Expected %d got %d",
690 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
691 rc = -EKEYREJECTED;
692 goto ssetup_exit;
693 }
694 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
695 GFP_KERNEL);
696 if (!ses->auth_key.response) {
697 cifs_dbg(VFS,
698 "Kerberos can't allocate (%u bytes) memory",
699 msg->sesskey_len);
700 rc = -ENOMEM;
701 goto ssetup_exit;
702 }
703 ses->auth_key.len = msg->sesskey_len;
704 blob_length = msg->secblob_len;
705 iov[1].iov_base = msg->data + msg->sesskey_len;
706 iov[1].iov_len = blob_length;
707#else
708 rc = -EOPNOTSUPP;
709 goto ssetup_exit;
710#endif /* CONFIG_CIFS_UPCALL */
711 } else if (phase == NtLmNegotiate) { /* if not krb5 must be ntlmssp */
5478f9ba
PS		 712 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
713 GFP_KERNEL);
714 if (ntlmssp_blob == NULL) {
715 rc = -ENOMEM;
716 goto ssetup_exit;
717 }
718 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
719 if (use_spnego) {
720 /* blob_length = build_spnego_ntlmssp_blob(
721 &security_blob,
722 sizeof(struct _NEGOTIATE_MESSAGE),
723 ntlmssp_blob); */
724 /* BB eventually need to add this */
f96637be 725 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
5478f9ba
PS		 726 rc = -EOPNOTSUPP;
727 kfree(ntlmssp_blob);
728 goto ssetup_exit;
729 } else {
730 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
731 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
732 security_blob = ntlmssp_blob;
733 }
ceb1b0b9
SF		 734 iov[1].iov_base = security_blob;
735 iov[1].iov_len = blob_length;
5478f9ba
PS		 736 } else if (phase == NtLmAuthenticate) {
737 req->hdr.SessionId = ses->Suid;
2afb8b21 738 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
5478f9ba
PS		 739 nls_cp);
740 if (rc) {
f96637be
JP		 741 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n",
742 rc);
5478f9ba
PS		 743 goto ssetup_exit; /* BB double check error handling */
744 }
745 if (use_spnego) {
746 /* blob_length = build_spnego_ntlmssp_blob(
747 &security_blob,
748 blob_length,
749 ntlmssp_blob); */
f96637be 750 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
5478f9ba
PS		 751 rc = -EOPNOTSUPP;
752 kfree(ntlmssp_blob);
753 goto ssetup_exit;
754 } else {
755 security_blob = ntlmssp_blob;
756 }
ceb1b0b9
SF		 757 iov[1].iov_base = security_blob;
758 iov[1].iov_len = blob_length;
5478f9ba 759 } else {
f96637be 760 cifs_dbg(VFS, "illegal ntlmssp phase\n");
5478f9ba
PS		 761 rc = -EIO;
762 goto ssetup_exit;
763 }
764
765 /* Testing shows that buffer offset must be at location of Buffer[0] */
766 req->SecurityBufferOffset =
767 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
768 1 /* pad */ - 4 /* rfc1001 len */);
769 req->SecurityBufferLength = cpu_to_le16(blob_length);
5478f9ba
PS		 770
771 inc_rfc1001_len(req, blob_length - 1 /* pad */);
772
773 /* BB add code to build os and lm fields */
774
6d8b59d7
SF		 775 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype,
776 CIFS_LOG_ERROR | CIFS_NEG_OP);
5478f9ba
PS		 777
778 kfree(security_blob);
779 rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base;
ceb1b0b9 780 ses->Suid = rsp->hdr.SessionId;
4ca3a99c
PS		 781 if (resp_buftype != CIFS_NO_BUFFER &&
782 rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) {
5478f9ba 783 if (phase != NtLmNegotiate) {
f96637be 784 cifs_dbg(VFS, "Unexpected more processing error\n");
5478f9ba
PS		 785 goto ssetup_exit;
786 }
787 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
4ca3a99c 788 le16_to_cpu(rsp->SecurityBufferOffset)) {
f96637be
JP		 789 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
790 le16_to_cpu(rsp->SecurityBufferOffset));
5478f9ba
PS		 791 rc = -EIO;
792 goto ssetup_exit;
793 }
794
795 /* NTLMSSP Negotiate sent now processing challenge (response) */
796 phase = NtLmChallenge; /* process ntlmssp challenge */
797 rc = 0; /* MORE_PROCESSING is not an error here but expected */
5478f9ba
PS		 798 rc = decode_ntlmssp_challenge(rsp->Buffer,
799 le16_to_cpu(rsp->SecurityBufferLength), ses);
800 }
801
802 /*
803 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
804 * but at least the raw NTLMSSP case works.
805 */
806 /*
807 * No tcon so can't do
808 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
809 */
810 if (rc != 0)
811 goto ssetup_exit;
812
5478f9ba 813 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
0cbaa53c
SF		 814 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
815 cifs_dbg(VFS, "SMB3 encryption not supported yet\n");
5478f9ba
PS		 816ssetup_exit:
817 free_rsp_buf(resp_buftype, rsp);
818
819 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
820 if ((phase == NtLmChallenge) && (rc == 0))
821 goto ssetup_ntlmssp_authenticate;
d4e63bd6
SP		 822
823 if (!rc) {
824 mutex_lock(&server->srv_mutex);
32811d24
SP		 825 if (server->sign && server->ops->generate_signingkey) {
826 rc = server->ops->generate_signingkey(ses);
827 kfree(ses->auth_key.response);
828 ses->auth_key.response = NULL;
829 if (rc) {
830 cifs_dbg(FYI,
831 "SMB3 session key generation failed\n");
832 mutex_unlock(&server->srv_mutex);
833 goto keygen_exit;
834 }
835 }
d4e63bd6
SP		 836 if (!server->session_estab) {
837 server->sequence_number = 0x2;
838 server->session_estab = true;
d4e63bd6
SP		 839 }
840 mutex_unlock(&server->srv_mutex);
841
842 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
843 spin_lock(&GlobalMid_Lock);
844 ses->status = CifsGood;
845 ses->need_reconnect = false;
846 spin_unlock(&GlobalMid_Lock);
847 }
848
32811d24 849keygen_exit:
d4e63bd6
SP		 850 if (!server->sign) {
851 kfree(ses->auth_key.response);
852 ses->auth_key.response = NULL;
853 }
ceb1b0b9
SF		 854 if (spnego_key) {
855 key_invalidate(spnego_key);
856 key_put(spnego_key);
857 }
d4e63bd6
SP		 858 kfree(ses->ntlmssp);
859
5478f9ba
PS		 860 return rc;
861}
862
863int
864SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
865{
866 struct smb2_logoff_req *req; /* response is also trivial struct */
867 int rc = 0;
868 struct TCP_Server_Info *server;
869
f96637be 870 cifs_dbg(FYI, "disconnect session %p\n", ses);
5478f9ba
PS		 871
872 if (ses && (ses->server))
873 server = ses->server;
874 else
875 return -EIO;
876
eb4c7df6
SP		 877 /* no need to send SMB logoff if uid already closed due to reconnect */
878 if (ses->need_reconnect)
879 goto smb2_session_already_dead;
880
5478f9ba
PS		 881 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
882 if (rc)
883 return rc;
884
885 /* since no tcon, smb2_init can not do this, so do here */
886 req->hdr.SessionId = ses->Suid;
38d77c50 887 if (server->sign)
3c1bf7e4 888 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
5478f9ba
PS		 889
890 rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0);
891 /*
892 * No tcon so can't do
893 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
894 */
eb4c7df6
SP		 895
896smb2_session_already_dead:
5478f9ba
PS		 897 return rc;
898}
faaf946a
PS		 899
900static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
901{
d60622eb 902 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
faaf946a
PS		 903}
904
905#define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
906
de9f68df
SF		 907/* These are similar values to what Windows uses */
908static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
909{
910 tcon->max_chunks = 256;
911 tcon->max_bytes_chunk = 1048576;
912 tcon->max_bytes_copy = 16777216;
913}
914
faaf946a
PS		 915int
916SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
917 struct cifs_tcon *tcon, const struct nls_table *cp)
918{
919 struct smb2_tree_connect_req *req;
920 struct smb2_tree_connect_rsp *rsp = NULL;
921 struct kvec iov[2];
922 int rc = 0;
923 int resp_buftype;
924 int unc_path_len;
925 struct TCP_Server_Info *server;
926 __le16 *unc_path = NULL;
927
f96637be 928 cifs_dbg(FYI, "TCON\n");
faaf946a
PS		 929
930 if ((ses->server) && tree)
931 server = ses->server;
932 else
933 return -EIO;
934
935 if (tcon && tcon->bad_network_name)
936 return -ENOENT;
937
ff9f84b7 938 if ((tcon && tcon->seal) &&
88627148
SF		 939 ((ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) == 0)) {
940 cifs_dbg(VFS, "encryption requested but no server support");
941 return -EOPNOTSUPP;
942 }
943
faaf946a
PS		 944 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
945 if (unc_path == NULL)
946 return -ENOMEM;
947
948 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
949 unc_path_len *= 2;
950 if (unc_path_len < 2) {
951 kfree(unc_path);
952 return -EINVAL;
953 }
954
955 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
956 if (rc) {
957 kfree(unc_path);
958 return rc;
959 }
960
961 if (tcon == NULL) {
962 /* since no tcon, smb2_init can not do this, so do here */
963 req->hdr.SessionId = ses->Suid;
964 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
965 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
966 }
967
968 iov[0].iov_base = (char *)req;
969 /* 4 for rfc1002 length field and 1 for pad */
970 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
971
972 /* Testing shows that buffer offset must be at location of Buffer[0] */
973 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
974 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
975 req->PathLength = cpu_to_le16(unc_path_len - 2);
976 iov[1].iov_base = unc_path;
977 iov[1].iov_len = unc_path_len;
978
979 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
980
981 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
982 rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base;
983
984 if (rc != 0) {
985 if (tcon) {
986 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
987 tcon->need_reconnect = true;
988 }
989 goto tcon_error_exit;
990 }
991
faaf946a
PS		 992 if (tcon == NULL) {
993 ses->ipc_tid = rsp->hdr.TreeId;
994 goto tcon_exit;
995 }
996
997 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
f96637be 998 cifs_dbg(FYI, "connection to disk share\n");
faaf946a
PS		 999 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
1000 tcon->ipc = true;
f96637be 1001 cifs_dbg(FYI, "connection to pipe share\n");
faaf946a
PS		 1002 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
1003 tcon->print = true;
f96637be 1004 cifs_dbg(FYI, "connection to printer\n");
faaf946a 1005 } else {
f96637be 1006 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
faaf946a
PS		 1007 rc = -EOPNOTSUPP;
1008 goto tcon_error_exit;
1009 }
1010
1011 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
769ee6a4 1012 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
faaf946a
PS		 1013 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1014 tcon->tidStatus = CifsGood;
1015 tcon->need_reconnect = false;
1016 tcon->tid = rsp->hdr.TreeId;
46b51d08 1017 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
faaf946a
PS		 1018
1019 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1020 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
f96637be 1021 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
de9f68df 1022 init_copy_chunk_defaults(tcon);
88627148
SF		 1023 if (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA)
1024 cifs_dbg(VFS, "Encrypted shares not supported");
ff1c038a
SF		 1025 if (tcon->ses->server->ops->validate_negotiate)
1026 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
faaf946a
PS		 1027tcon_exit:
1028 free_rsp_buf(resp_buftype, rsp);
1029 kfree(unc_path);
1030 return rc;
1031
1032tcon_error_exit:
1033 if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) {
f96637be 1034 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
18f39e7b
SF		 1035 if (tcon)
1036 tcon->bad_network_name = true;
faaf946a
PS		 1037 }
1038 goto tcon_exit;
1039}
1040
1041int
1042SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1043{
1044 struct smb2_tree_disconnect_req *req; /* response is trivial */
1045 int rc = 0;
1046 struct TCP_Server_Info *server;
1047 struct cifs_ses *ses = tcon->ses;
1048
f96637be 1049 cifs_dbg(FYI, "Tree Disconnect\n");
faaf946a
PS		 1050
1051 if (ses && (ses->server))
1052 server = ses->server;
1053 else
1054 return -EIO;
1055
1056 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1057 return 0;
1058
1059 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
1060 if (rc)
1061 return rc;
1062
1063 rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0);
1064 if (rc)
1065 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1066
1067 return rc;
1068}
2503a0db 1069
b8c32dbb 1070
63eb3def
PS		 1071static struct create_durable *
1072create_durable_buf(void)
1073{
1074 struct create_durable *buf;
1075
1076 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1077 if (!buf)
1078 return NULL;
1079
1080 buf->ccontext.DataOffset = cpu_to_le16(offsetof
9cbc0b73 1081 (struct create_durable, Data));
63eb3def
PS		 1082 buf->ccontext.DataLength = cpu_to_le32(16);
1083 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1084 (struct create_durable, Name));
1085 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 1086 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
63eb3def
PS		 1087 buf->Name[0] = 'D';
1088 buf->Name[1] = 'H';
1089 buf->Name[2] = 'n';
1090 buf->Name[3] = 'Q';
1091 return buf;
1092}
1093
9cbc0b73
PS		 1094static struct create_durable *
1095create_reconnect_durable_buf(struct cifs_fid *fid)
1096{
1097 struct create_durable *buf;
1098
1099 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1100 if (!buf)
1101 return NULL;
1102
1103 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1104 (struct create_durable, Data));
1105 buf->ccontext.DataLength = cpu_to_le32(16);
1106 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1107 (struct create_durable, Name));
1108 buf->ccontext.NameLength = cpu_to_le16(4);
1109 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1110 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
12197a7f 1111 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
9cbc0b73
PS		 1112 buf->Name[0] = 'D';
1113 buf->Name[1] = 'H';
1114 buf->Name[2] = 'n';
1115 buf->Name[3] = 'C';
1116 return buf;
1117}
1118
b8c32dbb 1119static __u8
42873b0a
PS		 1120parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
1121 unsigned int *epoch)
b8c32dbb
PS		 1122{
1123 char *data_offset;
b5c7cde3 1124 struct create_context *cc;
81845d31
JM		 1125 unsigned int next;
1126 unsigned int remaining;
fd554396 1127 char *name;
b8c32dbb 1128
fd554396 1129 data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
81845d31 1130 remaining = le32_to_cpu(rsp->CreateContextsLength);
b5c7cde3 1131 cc = (struct create_context *)data_offset;
81845d31 1132 while (remaining >= sizeof(struct create_context)) {
b5c7cde3 1133 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
81845d31
JM		 1134 if (le16_to_cpu(cc->NameLength) == 4 &&
1135 strncmp(name, "RqLs", 4) == 0)
1136 return server->ops->parse_lease_buf(cc, epoch);
1137
1138 next = le32_to_cpu(cc->Next);
1139 if (!next)
1140 break;
1141 remaining -= next;
1142 cc = (struct create_context *)((char *)cc + next);
1143 }
b8c32dbb 1144
b5c7cde3 1145 return 0;
b8c32dbb
PS		 1146}
1147
d22cbfec 1148static int
a41a28bd
PS		 1149add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1150 unsigned int *num_iovec, __u8 *oplock)
d22cbfec
PS		 1151{
1152 struct smb2_create_req *req = iov[0].iov_base;
1153 unsigned int num = *num_iovec;
1154
a41a28bd 1155 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
d22cbfec
PS		 1156 if (iov[num].iov_base == NULL)
1157 return -ENOMEM;
a41a28bd 1158 iov[num].iov_len = server->vals->create_lease_size;
d22cbfec
PS		 1159 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1160 if (!req->CreateContextsOffset)
1161 req->CreateContextsOffset = cpu_to_le32(
1162 sizeof(struct smb2_create_req) - 4 +
1163 iov[num - 1].iov_len);
a41a28bd
PS		 1164 le32_add_cpu(&req->CreateContextsLength,
1165 server->vals->create_lease_size);
1166 inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
d22cbfec
PS		 1167 *num_iovec = num + 1;
1168 return 0;
1169}
1170
b56eae4d
SF		 1171static struct create_durable_v2 *
1172create_durable_v2_buf(struct cifs_fid *pfid)
1173{
1174 struct create_durable_v2 *buf;
1175
1176 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
1177 if (!buf)
1178 return NULL;
1179
1180 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1181 (struct create_durable_v2, dcontext));
1182 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
1183 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1184 (struct create_durable_v2, Name));
1185 buf->ccontext.NameLength = cpu_to_le16(4);
1186
1187 buf->dcontext.Timeout = 0; /* Should this be configurable by workload */
1188 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1189 get_random_bytes(buf->dcontext.CreateGuid, 16);
1190 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
1191
1192 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1193 buf->Name[0] = 'D';
1194 buf->Name[1] = 'H';
1195 buf->Name[2] = '2';
1196 buf->Name[3] = 'Q';
1197 return buf;
1198}
1199
1200static struct create_durable_handle_reconnect_v2 *
1201create_reconnect_durable_v2_buf(struct cifs_fid *fid)
1202{
1203 struct create_durable_handle_reconnect_v2 *buf;
1204
1205 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
1206 GFP_KERNEL);
1207 if (!buf)
1208 return NULL;
1209
1210 buf->ccontext.DataOffset =
1211 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1212 dcontext));
1213 buf->ccontext.DataLength =
1214 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
1215 buf->ccontext.NameOffset =
1216 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1217 Name));
1218 buf->ccontext.NameLength = cpu_to_le16(4);
1219
1220 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
1221 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
1222 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1223 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
1224
1225 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1226 buf->Name[0] = 'D';
1227 buf->Name[1] = 'H';
1228 buf->Name[2] = '2';
1229 buf->Name[3] = 'C';
1230 return buf;
1231}
1232
63eb3def 1233static int
b56eae4d
SF		 1234add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
1235 struct cifs_open_parms *oparms)
1236{
1237 struct smb2_create_req *req = iov[0].iov_base;
1238 unsigned int num = *num_iovec;
1239
1240 iov[num].iov_base = create_durable_v2_buf(oparms->fid);
1241 if (iov[num].iov_base == NULL)
1242 return -ENOMEM;
1243 iov[num].iov_len = sizeof(struct create_durable_v2);
1244 if (!req->CreateContextsOffset)
1245 req->CreateContextsOffset =
1246 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1247 iov[1].iov_len);
1248 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
1249 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable_v2));
1250 *num_iovec = num + 1;
1251 return 0;
1252}
1253
1254static int
1255add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
9cbc0b73 1256 struct cifs_open_parms *oparms)
63eb3def
PS		 1257{
1258 struct smb2_create_req *req = iov[0].iov_base;
1259 unsigned int num = *num_iovec;
1260
b56eae4d
SF		 1261 /* indicate that we don't need to relock the file */
1262 oparms->reconnect = false;
1263
1264 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
1265 if (iov[num].iov_base == NULL)
1266 return -ENOMEM;
1267 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
1268 if (!req->CreateContextsOffset)
1269 req->CreateContextsOffset =
1270 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1271 iov[1].iov_len);
1272 le32_add_cpu(&req->CreateContextsLength,
1273 sizeof(struct create_durable_handle_reconnect_v2));
1274 inc_rfc1001_len(&req->hdr,
1275 sizeof(struct create_durable_handle_reconnect_v2));
1276 *num_iovec = num + 1;
1277 return 0;
1278}
1279
1280static int
1281add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1282 struct cifs_open_parms *oparms, bool use_persistent)
1283{
1284 struct smb2_create_req *req = iov[0].iov_base;
1285 unsigned int num = *num_iovec;
1286
1287 if (use_persistent) {
1288 if (oparms->reconnect)
1289 return add_durable_reconnect_v2_context(iov, num_iovec,
1290 oparms);
1291 else
1292 return add_durable_v2_context(iov, num_iovec, oparms);
1293 }
1294
9cbc0b73
PS		 1295 if (oparms->reconnect) {
1296 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1297 /* indicate that we don't need to relock the file */
1298 oparms->reconnect = false;
1299 } else
1300 iov[num].iov_base = create_durable_buf();
63eb3def
PS		 1301 if (iov[num].iov_base == NULL)
1302 return -ENOMEM;
1303 iov[num].iov_len = sizeof(struct create_durable);
1304 if (!req->CreateContextsOffset)
1305 req->CreateContextsOffset =
1306 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1307 iov[1].iov_len);
31f92e9a 1308 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
63eb3def
PS		 1309 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
1310 *num_iovec = num + 1;
1311 return 0;
1312}
1313
2503a0db 1314int
064f6047 1315SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
b42bf888
PS		 1316 __u8 *oplock, struct smb2_file_all_info *buf,
1317 struct smb2_err_rsp **err_buf)
2503a0db
PS		 1318{
1319 struct smb2_create_req *req;
1320 struct smb2_create_rsp *rsp;
1321 struct TCP_Server_Info *server;
064f6047 1322 struct cifs_tcon *tcon = oparms->tcon;
2503a0db 1323 struct cifs_ses *ses = tcon->ses;
63eb3def 1324 struct kvec iov[4];
2503a0db
PS		 1325 int resp_buftype;
1326 int uni_path_len;
b8c32dbb
PS		 1327 __le16 *copy_path = NULL;
1328 int copy_size;
2503a0db 1329 int rc = 0;
59aa3718 1330 unsigned int num_iovecs = 2;
ca81983f 1331 __u32 file_attributes = 0;
663a9621 1332 char *dhc_buf = NULL, *lc_buf = NULL;
2503a0db 1333
f96637be 1334 cifs_dbg(FYI, "create/open\n");
2503a0db
PS		 1335
1336 if (ses && (ses->server))
1337 server = ses->server;
1338 else
1339 return -EIO;
1340
1341 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
1342 if (rc)
1343 return rc;
1344
064f6047 1345 if (oparms->create_options & CREATE_OPTION_READONLY)
ca81983f 1346 file_attributes |= ATTR_READONLY;
db8b631d
SF		 1347 if (oparms->create_options & CREATE_OPTION_SPECIAL)
1348 file_attributes |= ATTR_SYSTEM;
ca81983f 1349
2503a0db 1350 req->ImpersonationLevel = IL_IMPERSONATION;
064f6047 1351 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
2503a0db
PS		 1352 /* File attributes ignored on open (used in create though) */
1353 req->FileAttributes = cpu_to_le32(file_attributes);
1354 req->ShareAccess = FILE_SHARE_ALL_LE;
064f6047
PS		 1355 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1356 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
2503a0db 1357 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
59aa3718
PS		 1358 /* do not count rfc1001 len field */
1359 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
2503a0db
PS		 1360
1361 iov[0].iov_base = (char *)req;
1362 /* 4 for rfc1002 length field */
1363 iov[0].iov_len = get_rfc1002_length(req) + 4;
1364
1365 /* MUST set path len (NameLength) to 0 opening root of share */
59aa3718
PS		 1366 req->NameLength = cpu_to_le16(uni_path_len - 2);
1367 /* -1 since last byte is buf[0] which is sent below (path) */
1368 iov[0].iov_len--;
1369 if (uni_path_len % 8 != 0) {
1370 copy_size = uni_path_len / 8 * 8;
1371 if (copy_size < uni_path_len)
1372 copy_size += 8;
1373
1374 copy_path = kzalloc(copy_size, GFP_KERNEL);
1375 if (!copy_path)
1376 return -ENOMEM;
1377 memcpy((char *)copy_path, (const char *)path,
1378 uni_path_len);
1379 uni_path_len = copy_size;
1380 path = copy_path;
2503a0db
PS		 1381 }
1382
59aa3718
PS		 1383 iov[1].iov_len = uni_path_len;
1384 iov[1].iov_base = path;
1385 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1386 inc_rfc1001_len(req, uni_path_len - 1);
1387
b8c32dbb
PS		 1388 if (!server->oplocks)
1389 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1390
a41a28bd 1391 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
b8c32dbb
PS		 1392 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1393 req->RequestedOplockLevel = *oplock;
1394 else {
a41a28bd 1395 rc = add_lease_context(server, iov, &num_iovecs, oplock);
d22cbfec 1396 if (rc) {
b8c32dbb
PS		 1397 cifs_small_buf_release(req);
1398 kfree(copy_path);
d22cbfec 1399 return rc;
b8c32dbb 1400 }
663a9621 1401 lc_buf = iov[num_iovecs-1].iov_base;
b8c32dbb
PS		 1402 }
1403
63eb3def
PS		 1404 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1405 /* need to set Next field of lease context if we request it */
a41a28bd 1406 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
63eb3def
PS		 1407 struct create_context *ccontext =
1408 (struct create_context *)iov[num_iovecs-1].iov_base;
1c46943f 1409 ccontext->Next =
a41a28bd 1410 cpu_to_le32(server->vals->create_lease_size);
63eb3def 1411 }
b56eae4d
SF		 1412
1413 rc = add_durable_context(iov, &num_iovecs, oparms,
1414 tcon->use_persistent);
63eb3def
PS		 1415 if (rc) {
1416 cifs_small_buf_release(req);
1417 kfree(copy_path);
663a9621 1418 kfree(lc_buf);
63eb3def
PS		 1419 return rc;
1420 }
663a9621 1421 dhc_buf = iov[num_iovecs-1].iov_base;
63eb3def
PS		 1422 }
1423
2503a0db
PS		 1424 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1425 rsp = (struct smb2_create_rsp *)iov[0].iov_base;
1426
1427 if (rc != 0) {
1428 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
b42bf888
PS		 1429 if (err_buf)
1430 *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
1431 GFP_KERNEL);
2503a0db
PS		 1432 goto creat_exit;
1433 }
1434
064f6047
PS		 1435 oparms->fid->persistent_fid = rsp->PersistentFileId;
1436 oparms->fid->volatile_fid = rsp->VolatileFileId;
f0df737e
PS		 1437
1438 if (buf) {
1439 memcpy(buf, &rsp->CreationTime, 32);
1440 buf->AllocationSize = rsp->AllocationSize;
1441 buf->EndOfFile = rsp->EndofFile;
1442 buf->Attributes = rsp->FileAttributes;
1443 buf->NumberOfLinks = cpu_to_le32(1);
1444 buf->DeletePending = 0;
1445 }
2e44b288 1446
b8c32dbb 1447 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
42873b0a 1448 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
b8c32dbb
PS		 1449 else
1450 *oplock = rsp->OplockLevel;
2503a0db 1451creat_exit:
b8c32dbb 1452 kfree(copy_path);
663a9621
PS		 1453 kfree(lc_buf);
1454 kfree(dhc_buf);
2503a0db
PS		 1455 free_rsp_buf(resp_buftype, rsp);
1456 return rc;
1457}
1458
4a72dafa
SF		 1459/*
1460 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1461 */
1462int
1463SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1464 u64 volatile_fid, u32 opcode, bool is_fsctl, char *in_data,
1465 u32 indatalen, char **out_data, u32 *plen /* returned data len */)
1466{
1467 struct smb2_ioctl_req *req;
1468 struct smb2_ioctl_rsp *rsp;
1469 struct TCP_Server_Info *server;
8e353106 1470 struct cifs_ses *ses;
4a72dafa
SF		 1471 struct kvec iov[2];
1472 int resp_buftype;
1473 int num_iovecs;
1474 int rc = 0;
1475
1476 cifs_dbg(FYI, "SMB2 IOCTL\n");
1477
3d1a3745
SF		 1478 if (out_data != NULL)
1479 *out_data = NULL;
1480
4a72dafa
SF		 1481 /* zero out returned data len, in case of error */
1482 if (plen)
1483 *plen = 0;
1484
8e353106
SF		 1485 if (tcon)
1486 ses = tcon->ses;
1487 else
1488 return -EIO;
1489
4a72dafa
SF		 1490 if (ses && (ses->server))
1491 server = ses->server;
1492 else
1493 return -EIO;
1494
1495 rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req);
1496 if (rc)
1497 return rc;
1498
1499 req->CtlCode = cpu_to_le32(opcode);
1500 req->PersistentFileId = persistent_fid;
1501 req->VolatileFileId = volatile_fid;
1502
1503 if (indatalen) {
1504 req->InputCount = cpu_to_le32(indatalen);
1505 /* do not set InputOffset if no input data */
1506 req->InputOffset =
1507 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4);
1508 iov[1].iov_base = in_data;
1509 iov[1].iov_len = indatalen;
1510 num_iovecs = 2;
1511 } else
1512 num_iovecs = 1;
1513
1514 req->OutputOffset = 0;
1515 req->OutputCount = 0; /* MBZ */
1516
1517 /*
1518 * Could increase MaxOutputResponse, but that would require more
1519 * than one credit. Windows typically sets this smaller, but for some
1520 * ioctls it may be useful to allow server to send more. No point
1521 * limiting what the server can send as long as fits in one credit
1522 */
1523 req->MaxOutputResponse = cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1524
1525 if (is_fsctl)
1526 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
1527 else
1528 req->Flags = 0;
1529
1530 iov[0].iov_base = (char *)req;
4a72dafa 1531
7ff8d45c
SF		 1532 /*
1533 * If no input data, the size of ioctl struct in
1534 * protocol spec still includes a 1 byte data buffer,
1535 * but if input data passed to ioctl, we do not
1536 * want to double count this, so we do not send
1537 * the dummy one byte of data in iovec[0] if sending
1538 * input data (in iovec[1]). We also must add 4 bytes
1539 * in first iovec to allow for rfc1002 length field.
1540 */
1541
1542 if (indatalen) {
1543 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1544 inc_rfc1001_len(req, indatalen - 1);
1545 } else
1546 iov[0].iov_len = get_rfc1002_length(req) + 4;
1547
4a72dafa
SF		 1548
1549 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1550 rsp = (struct smb2_ioctl_rsp *)iov[0].iov_base;
1551
9bf0c9cd 1552 if ((rc != 0) && (rc != -EINVAL)) {
8e353106 1553 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
4a72dafa 1554 goto ioctl_exit;
9bf0c9cd
SF		 1555 } else if (rc == -EINVAL) {
1556 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
1557 (opcode != FSCTL_SRV_COPYCHUNK)) {
8e353106 1558 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
9bf0c9cd
SF		 1559 goto ioctl_exit;
1560 }
4a72dafa
SF		 1561 }
1562
1563 /* check if caller wants to look at return data or just return rc */
1564 if ((plen == NULL) || (out_data == NULL))
1565 goto ioctl_exit;
1566
1567 *plen = le32_to_cpu(rsp->OutputCount);
1568
1569 /* We check for obvious errors in the output buffer length and offset */
1570 if (*plen == 0)
1571 goto ioctl_exit; /* server returned no data */
1572 else if (*plen > 0xFF00) {
1573 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
1574 *plen = 0;
1575 rc = -EIO;
1576 goto ioctl_exit;
1577 }
1578
1579 if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
1580 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
1581 le32_to_cpu(rsp->OutputOffset));
1582 *plen = 0;
1583 rc = -EIO;
1584 goto ioctl_exit;
1585 }
1586
1587 *out_data = kmalloc(*plen, GFP_KERNEL);
1588 if (*out_data == NULL) {
1589 rc = -ENOMEM;
1590 goto ioctl_exit;
1591 }
1592
1593 memcpy(*out_data, rsp->hdr.ProtocolId + le32_to_cpu(rsp->OutputOffset),
1594 *plen);
1595ioctl_exit:
1596 free_rsp_buf(resp_buftype, rsp);
1597 return rc;
1598}
1599
64a5cfa6
SF		 1600/*
1601 * Individual callers to ioctl worker function follow
1602 */
1603
1604int
1605SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1606 u64 persistent_fid, u64 volatile_fid)
1607{
1608 int rc;
64a5cfa6
SF		 1609 struct compress_ioctl fsctl_input;
1610 char *ret_data = NULL;
1611
1612 fsctl_input.CompressionState =
bc09d141 1613 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
64a5cfa6
SF		 1614
1615 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1616 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
1617 (char *)&fsctl_input /* data input */,
1618 2 /* in data len */, &ret_data /* out data */, NULL);
1619
1620 cifs_dbg(FYI, "set compression rc %d\n", rc);
64a5cfa6
SF		 1621
1622 return rc;
1623}
1624
2503a0db
PS		 1625int
1626SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1627 u64 persistent_fid, u64 volatile_fid)
1628{
1629 struct smb2_close_req *req;
1630 struct smb2_close_rsp *rsp;
1631 struct TCP_Server_Info *server;
1632 struct cifs_ses *ses = tcon->ses;
1633 struct kvec iov[1];
1634 int resp_buftype;
1635 int rc = 0;
1636
f96637be 1637 cifs_dbg(FYI, "Close\n");
2503a0db
PS		 1638
1639 if (ses && (ses->server))
1640 server = ses->server;
1641 else
1642 return -EIO;
1643
1644 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1645 if (rc)
1646 return rc;
1647
1648 req->PersistentFileId = persistent_fid;
1649 req->VolatileFileId = volatile_fid;
1650
1651 iov[0].iov_base = (char *)req;
1652 /* 4 for rfc1002 length field */
1653 iov[0].iov_len = get_rfc1002_length(req) + 4;
1654
1655 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1656 rsp = (struct smb2_close_rsp *)iov[0].iov_base;
1657
1658 if (rc != 0) {
d4a029d2 1659 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
2503a0db
PS		 1660 goto close_exit;
1661 }
1662
2503a0db
PS		 1663 /* BB FIXME - decode close response, update inode for caching */
1664
1665close_exit:
1666 free_rsp_buf(resp_buftype, rsp);
1667 return rc;
1668}
be4cb9e3
PS		 1669
1670static int
1671validate_buf(unsigned int offset, unsigned int buffer_length,
1672 struct smb2_hdr *hdr, unsigned int min_buf_size)
1673
1674{
1675 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
1676 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
1677 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1678 char *end_of_buf = begin_of_buf + buffer_length;
1679
1680
1681 if (buffer_length < min_buf_size) {
f96637be
JP		 1682 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
1683 buffer_length, min_buf_size);
be4cb9e3
PS		 1684 return -EINVAL;
1685 }
1686
1687 /* check if beyond RFC1001 maximum length */
1688 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
f96637be
JP		 1689 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
1690 buffer_length, smb_len);
be4cb9e3
PS		 1691 return -EINVAL;
1692 }
1693
1694 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
f96637be 1695 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
be4cb9e3
PS		 1696 return -EINVAL;
1697 }
1698
1699 return 0;
1700}
1701
1702/*
1703 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1704 * Caller must free buffer.
1705 */
1706static int
1707validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
1708 struct smb2_hdr *hdr, unsigned int minbufsize,
1709 char *data)
1710
1711{
1712 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1713 int rc;
1714
1715 if (!data)
1716 return -EINVAL;
1717
1718 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
1719 if (rc)
1720 return rc;
1721
1722 memcpy(data, begin_of_buf, buffer_length);
1723
1724 return 0;
1725}
1726
f0df737e
PS		 1727static int
1728query_info(const unsigned int xid, struct cifs_tcon *tcon,
1729 u64 persistent_fid, u64 volatile_fid, u8 info_class,
1730 size_t output_len, size_t min_len, void *data)
be4cb9e3
PS		 1731{
1732 struct smb2_query_info_req *req;
1733 struct smb2_query_info_rsp *rsp = NULL;
1734 struct kvec iov[2];
1735 int rc = 0;
1736 int resp_buftype;
1737 struct TCP_Server_Info *server;
1738 struct cifs_ses *ses = tcon->ses;
1739
f96637be 1740 cifs_dbg(FYI, "Query Info\n");
be4cb9e3
PS		 1741
1742 if (ses && (ses->server))
1743 server = ses->server;
1744 else
1745 return -EIO;
1746
1747 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
1748 if (rc)
1749 return rc;
1750
1751 req->InfoType = SMB2_O_INFO_FILE;
f0df737e 1752 req->FileInfoClass = info_class;
be4cb9e3
PS		 1753 req->PersistentFileId = persistent_fid;
1754 req->VolatileFileId = volatile_fid;
1755 /* 4 for rfc1002 length field and 1 for Buffer */
1756 req->InputBufferOffset =
1757 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
f0df737e 1758 req->OutputBufferLength = cpu_to_le32(output_len);
be4cb9e3
PS		 1759
1760 iov[0].iov_base = (char *)req;
1761 /* 4 for rfc1002 length field */
1762 iov[0].iov_len = get_rfc1002_length(req) + 4;
1763
1764 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
e5d04887
PS		 1765 rsp = (struct smb2_query_info_rsp *)iov[0].iov_base;
1766
be4cb9e3
PS		 1767 if (rc) {
1768 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
1769 goto qinf_exit;
1770 }
1771
be4cb9e3
PS		 1772 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
1773 le32_to_cpu(rsp->OutputBufferLength),
f0df737e 1774 &rsp->hdr, min_len, data);
be4cb9e3
PS		 1775
1776qinf_exit:
1777 free_rsp_buf(resp_buftype, rsp);
1778 return rc;
1779}
9094fad1 1780
f0df737e
PS		 1781int
1782SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
1783 u64 persistent_fid, u64 volatile_fid,
1784 struct smb2_file_all_info *data)
1785{
1786 return query_info(xid, tcon, persistent_fid, volatile_fid,
1787 FILE_ALL_INFORMATION,
1bbe4997 1788 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
f0df737e
PS		 1789 sizeof(struct smb2_file_all_info), data);
1790}
1791
1792int
1793SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
1794 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
1795{
1796 return query_info(xid, tcon, persistent_fid, volatile_fid,
1797 FILE_INTERNAL_INFORMATION,
1798 sizeof(struct smb2_file_internal_info),
1799 sizeof(struct smb2_file_internal_info), uniqueid);
1800}
1801
9094fad1
PS		 1802/*
1803 * This is a no-op for now. We're not really interested in the reply, but
1804 * rather in the fact that the server sent one and that server->lstrp
1805 * gets updated.
1806 *
1807 * FIXME: maybe we should consider checking that the reply matches request?
1808 */
1809static void
1810smb2_echo_callback(struct mid_q_entry *mid)
1811{
1812 struct TCP_Server_Info *server = mid->callback_data;
1813 struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf;
1814 unsigned int credits_received = 1;
1815
1816 if (mid->mid_state == MID_RESPONSE_RECEIVED)
1817 credits_received = le16_to_cpu(smb2->hdr.CreditRequest);
1818
5fb4e288 1819 mutex_lock(&server->srv_mutex);
9094fad1 1820 DeleteMidQEntry(mid);
5fb4e288 1821 mutex_unlock(&server->srv_mutex);
9094fad1
PS		 1822 add_credits(server, credits_received, CIFS_ECHO_OP);
1823}
1824
1825int
1826SMB2_echo(struct TCP_Server_Info *server)
1827{
1828 struct smb2_echo_req *req;
1829 int rc = 0;
1830 struct kvec iov;
fec344e3
JL		 1831 struct smb_rqst rqst = { .rq_iov = &iov,
1832 .rq_nvec = 1 };
9094fad1 1833
f96637be 1834 cifs_dbg(FYI, "In echo request\n");
9094fad1 1835
71f650bf
SF		 1836 if (server->tcpStatus == CifsNeedNegotiate) {
1837 struct list_head *tmp, *tmp2;
1838 struct cifs_ses *ses;
1839 struct cifs_tcon *tcon;
1840
1841 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
1842 spin_lock(&cifs_tcp_ses_lock);
1843 list_for_each(tmp, &server->smb_ses_list) {
1844 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
1845 list_for_each(tmp2, &ses->tcon_list) {
1846 tcon = list_entry(tmp2, struct cifs_tcon,
1847 tcon_list);
1848 /* add check for persistent handle reconnect */
1849 if (tcon && tcon->need_reconnect) {
1850 spin_unlock(&cifs_tcp_ses_lock);
1851 rc = smb2_reconnect(SMB2_ECHO, tcon);
1852 spin_lock(&cifs_tcp_ses_lock);
1853 }
1854 }
1855 }
1856 spin_unlock(&cifs_tcp_ses_lock);
1857 }
1858
1859 /* if no session, renegotiate failed above */
1860 if (server->tcpStatus == CifsNeedNegotiate)
1861 return -EIO;
1862
9094fad1
PS		 1863 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
1864 if (rc)
1865 return rc;
1866
1867 req->hdr.CreditRequest = cpu_to_le16(1);
1868
1869 iov.iov_base = (char *)req;
1870 /* 4 for rfc1002 length field */
1871 iov.iov_len = get_rfc1002_length(req) + 4;
1872
fec344e3 1873 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server,
9094fad1
PS		 1874 CIFS_ECHO_OP);
1875 if (rc)
f96637be 1876 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
9094fad1
PS		 1877
1878 cifs_small_buf_release(req);
1879 return rc;
1880}
7a5cfb19
PS		 1881
1882int
1883SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1884 u64 volatile_fid)
1885{
1886 struct smb2_flush_req *req;
1887 struct TCP_Server_Info *server;
1888 struct cifs_ses *ses = tcon->ses;
1889 struct kvec iov[1];
1890 int resp_buftype;
1891 int rc = 0;
1892
f96637be 1893 cifs_dbg(FYI, "Flush\n");
7a5cfb19
PS		 1894
1895 if (ses && (ses->server))
1896 server = ses->server;
1897 else
1898 return -EIO;
1899
1900 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
1901 if (rc)
1902 return rc;
1903
1904 req->PersistentFileId = persistent_fid;
1905 req->VolatileFileId = volatile_fid;
1906
1907 iov[0].iov_base = (char *)req;
1908 /* 4 for rfc1002 length field */
1909 iov[0].iov_len = get_rfc1002_length(req) + 4;
1910
1911 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1912
dfebe400 1913 if (rc != 0)
7a5cfb19
PS		 1914 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
1915
1916 free_rsp_buf(resp_buftype, iov[0].iov_base);
1917 return rc;
1918}
09a4707e
PS		 1919
1920/*
1921 * To form a chain of read requests, any read requests after the first should
1922 * have the end_of_chain boolean set to true.
1923 */
1924static int
1925smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms,
1926 unsigned int remaining_bytes, int request_type)
1927{
1928 int rc = -EACCES;
1929 struct smb2_read_req *req = NULL;
1930
1931 rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req);
1932 if (rc)
1933 return rc;
1934 if (io_parms->tcon->ses->server == NULL)
1935 return -ECONNABORTED;
1936
1937 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1938
1939 req->PersistentFileId = io_parms->persistent_fid;
1940 req->VolatileFileId = io_parms->volatile_fid;
1941 req->ReadChannelInfoOffset = 0; /* reserved */
1942 req->ReadChannelInfoLength = 0; /* reserved */
1943 req->Channel = 0; /* reserved */
1944 req->MinimumCount = 0;
1945 req->Length = cpu_to_le32(io_parms->length);
1946 req->Offset = cpu_to_le64(io_parms->offset);
1947
1948 if (request_type & CHAINED_REQUEST) {
1949 if (!(request_type & END_OF_CHAIN)) {
1950 /* 4 for rfc1002 length field */
1951 req->hdr.NextCommand =
1952 cpu_to_le32(get_rfc1002_length(req) + 4);
1953 } else /* END_OF_CHAIN */
1954 req->hdr.NextCommand = 0;
1955 if (request_type & RELATED_REQUEST) {
1956 req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
1957 /*
1958 * Related requests use info from previous read request
1959 * in chain.
1960 */
1961 req->hdr.SessionId = 0xFFFFFFFF;
1962 req->hdr.TreeId = 0xFFFFFFFF;
1963 req->PersistentFileId = 0xFFFFFFFF;
1964 req->VolatileFileId = 0xFFFFFFFF;
1965 }
1966 }
1967 if (remaining_bytes > io_parms->length)
1968 req->RemainingBytes = cpu_to_le32(remaining_bytes);
1969 else
1970 req->RemainingBytes = 0;
1971
1972 iov[0].iov_base = (char *)req;
1973 /* 4 for rfc1002 length field */
1974 iov[0].iov_len = get_rfc1002_length(req) + 4;
1975 return rc;
1976}
1977
1978static void
1979smb2_readv_callback(struct mid_q_entry *mid)
1980{
1981 struct cifs_readdata *rdata = mid->callback_data;
1982 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
1983 struct TCP_Server_Info *server = tcon->ses->server;
5819575e 1984 struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base;
09a4707e 1985 unsigned int credits_received = 1;
5819575e 1986 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
8321fec4
JL		 1987 .rq_nvec = 1,
1988 .rq_pages = rdata->pages,
1989 .rq_npages = rdata->nr_pages,
1990 .rq_pagesz = rdata->pagesz,
1991 .rq_tailsz = rdata->tailsz };
09a4707e 1992
f96637be
JP		 1993 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1994 __func__, mid->mid, mid->mid_state, rdata->result,
1995 rdata->bytes);
09a4707e
PS		 1996
1997 switch (mid->mid_state) {
1998 case MID_RESPONSE_RECEIVED:
1999 credits_received = le16_to_cpu(buf->CreditRequest);
2000 /* result already set, check signature */
38d77c50 2001 if (server->sign) {
3c1bf7e4
PS		 2002 int rc;
2003
0b688cfc 2004 rc = smb2_verify_signature(&rqst, server);
3c1bf7e4 2005 if (rc)
f96637be
JP		 2006 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
2007 rc);
3c1bf7e4 2008 }
09a4707e 2009 /* FIXME: should this be counted toward the initiating task? */
34a54d61
PS		 2010 task_io_account_read(rdata->got_bytes);
2011 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 2012 break;
2013 case MID_REQUEST_SUBMITTED:
2014 case MID_RETRY_NEEDED:
2015 rdata->result = -EAGAIN;
d913ed17
PS		 2016 if (server->sign && rdata->got_bytes)
2017 /* reset bytes number since we can not check a sign */
2018 rdata->got_bytes = 0;
2019 /* FIXME: should this be counted toward the initiating task? */
2020 task_io_account_read(rdata->got_bytes);
2021 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 2022 break;
2023 default:
2024 if (rdata->result != -ENODATA)
2025 rdata->result = -EIO;
2026 }
2027
2028 if (rdata->result)
2029 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
2030
2031 queue_work(cifsiod_wq, &rdata->work);
5fb4e288 2032 mutex_lock(&server->srv_mutex);
09a4707e 2033 DeleteMidQEntry(mid);
5fb4e288 2034 mutex_unlock(&server->srv_mutex);
09a4707e
PS		 2035 add_credits(server, credits_received, 0);
2036}
2037
2038/* smb2_async_readv - send an async write, and set up mid to handle result */
2039int
2040smb2_async_readv(struct cifs_readdata *rdata)
2041{
bed9da02 2042 int rc, flags = 0;
09a4707e
PS		 2043 struct smb2_hdr *buf;
2044 struct cifs_io_parms io_parms;
5819575e 2045 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
fec344e3 2046 .rq_nvec = 1 };
bed9da02 2047 struct TCP_Server_Info *server;
09a4707e 2048
f96637be
JP		 2049 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
2050 __func__, rdata->offset, rdata->bytes);
09a4707e
PS		 2051
2052 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
2053 io_parms.offset = rdata->offset;
2054 io_parms.length = rdata->bytes;
2055 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
2056 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
2057 io_parms.pid = rdata->pid;
bed9da02
PS		 2058
2059 server = io_parms.tcon->ses->server;
2060
5819575e 2061 rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0);
bed9da02
PS		 2062 if (rc) {
2063 if (rc == -EAGAIN && rdata->credits) {
2064 /* credits was reset by reconnect */
2065 rdata->credits = 0;
2066 /* reduce in_flight value since we won't send the req */
2067 spin_lock(&server->req_lock);
2068 server->in_flight--;
2069 spin_unlock(&server->req_lock);
2070 }
09a4707e 2071 return rc;
bed9da02 2072 }
09a4707e 2073
5819575e 2074 buf = (struct smb2_hdr *)rdata->iov.iov_base;
09a4707e 2075 /* 4 for rfc1002 length field */
5819575e 2076 rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4;
09a4707e 2077
bed9da02
PS		 2078 if (rdata->credits) {
2079 buf->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
2080 SMB2_MAX_BUFFER_SIZE));
c0432fc7 2081 buf->CreditRequest = buf->CreditCharge;
bed9da02
PS		 2082 spin_lock(&server->req_lock);
2083 server->credits += rdata->credits -
2084 le16_to_cpu(buf->CreditCharge);
2085 spin_unlock(&server->req_lock);
2086 wake_up(&server->request_q);
2087 flags = CIFS_HAS_CREDITS;
2088 }
2089
09a4707e 2090 kref_get(&rdata->refcount);
fec344e3 2091 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
09a4707e 2092 cifs_readv_receive, smb2_readv_callback,
bed9da02 2093 rdata, flags);
e5d04887 2094 if (rc) {
09a4707e 2095 kref_put(&rdata->refcount, cifs_readdata_release);
e5d04887
PS		 2096 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
2097 }
09a4707e
PS		 2098
2099 cifs_small_buf_release(buf);
2100 return rc;
2101}
33319141 2102
d8e05039
PS		 2103int
2104SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
2105 unsigned int *nbytes, char **buf, int *buf_type)
2106{
2107 int resp_buftype, rc = -EACCES;
2108 struct smb2_read_rsp *rsp = NULL;
2109 struct kvec iov[1];
2110
2111 *nbytes = 0;
2112 rc = smb2_new_read_req(iov, io_parms, 0, 0);
2113 if (rc)
2114 return rc;
2115
2116 rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1,
2117 &resp_buftype, CIFS_LOG_ERROR);
2118
2119 rsp = (struct smb2_read_rsp *)iov[0].iov_base;
2120
2121 if (rsp->hdr.Status == STATUS_END_OF_FILE) {
2122 free_rsp_buf(resp_buftype, iov[0].iov_base);
2123 return 0;
2124 }
2125
2126 if (rc) {
2127 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
f96637be 2128 cifs_dbg(VFS, "Send error in read = %d\n", rc);
d8e05039
PS		 2129 } else {
2130 *nbytes = le32_to_cpu(rsp->DataLength);
2131 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
2132 (*nbytes > io_parms->length)) {
f96637be
JP		 2133 cifs_dbg(FYI, "bad length %d for count %d\n",
2134 *nbytes, io_parms->length);
d8e05039
PS		 2135 rc = -EIO;
2136 *nbytes = 0;
2137 }
2138 }
2139
2140 if (*buf) {
2141 memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset,
2142 *nbytes);
2143 free_rsp_buf(resp_buftype, iov[0].iov_base);
2144 } else if (resp_buftype != CIFS_NO_BUFFER) {
2145 *buf = iov[0].iov_base;
2146 if (resp_buftype == CIFS_SMALL_BUFFER)
2147 *buf_type = CIFS_SMALL_BUFFER;
2148 else if (resp_buftype == CIFS_LARGE_BUFFER)
2149 *buf_type = CIFS_LARGE_BUFFER;
2150 }
2151 return rc;
2152}
2153
33319141
PS		 2154/*
2155 * Check the mid_state and signature on received buffer (if any), and queue the
2156 * workqueue completion task.
2157 */
2158static void
2159smb2_writev_callback(struct mid_q_entry *mid)
2160{
2161 struct cifs_writedata *wdata = mid->callback_data;
2162 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
5fb4e288 2163 struct TCP_Server_Info *server = tcon->ses->server;
33319141
PS		 2164 unsigned int written;
2165 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
2166 unsigned int credits_received = 1;
2167
2168 switch (mid->mid_state) {
2169 case MID_RESPONSE_RECEIVED:
2170 credits_received = le16_to_cpu(rsp->hdr.CreditRequest);
2171 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
2172 if (wdata->result != 0)
2173 break;
2174
2175 written = le32_to_cpu(rsp->DataLength);
2176 /*
2177 * Mask off high 16 bits when bytes written as returned
2178 * by the server is greater than bytes requested by the
2179 * client. OS/2 servers are known to set incorrect
2180 * CountHigh values.
2181 */
2182 if (written > wdata->bytes)
2183 written &= 0xFFFF;
2184
2185 if (written < wdata->bytes)
2186 wdata->result = -ENOSPC;
2187 else
2188 wdata->bytes = written;
2189 break;
2190 case MID_REQUEST_SUBMITTED:
2191 case MID_RETRY_NEEDED:
2192 wdata->result = -EAGAIN;
2193 break;
2194 default:
2195 wdata->result = -EIO;
2196 break;
2197 }
2198
2199 if (wdata->result)
2200 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2201
2202 queue_work(cifsiod_wq, &wdata->work);
5fb4e288 2203 mutex_lock(&server->srv_mutex);
33319141 2204 DeleteMidQEntry(mid);
5fb4e288 2205 mutex_unlock(&server->srv_mutex);
33319141
PS		 2206 add_credits(tcon->ses->server, credits_received, 0);
2207}
2208
2209/* smb2_async_writev - send an async write, and set up mid to handle result */
2210int
4a5c80d7
SF		 2211smb2_async_writev(struct cifs_writedata *wdata,
2212 void (*release)(struct kref *kref))
33319141 2213{
cb7e9eab 2214 int rc = -EACCES, flags = 0;
33319141
PS		 2215 struct smb2_write_req *req = NULL;
2216 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
cb7e9eab 2217 struct TCP_Server_Info *server = tcon->ses->server;
eddb079d 2218 struct kvec iov;
fec344e3 2219 struct smb_rqst rqst;
33319141
PS		 2220
2221 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
cb7e9eab
PS		 2222 if (rc) {
2223 if (rc == -EAGAIN && wdata->credits) {
2224 /* credits was reset by reconnect */
2225 wdata->credits = 0;
2226 /* reduce in_flight value since we won't send the req */
2227 spin_lock(&server->req_lock);
2228 server->in_flight--;
2229 spin_unlock(&server->req_lock);
2230 }
33319141 2231 goto async_writev_out;
cb7e9eab 2232 }
33319141 2233
33319141
PS		 2234 req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid);
2235
2236 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
2237 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
2238 req->WriteChannelInfoOffset = 0;
2239 req->WriteChannelInfoLength = 0;
2240 req->Channel = 0;
2241 req->Offset = cpu_to_le64(wdata->offset);
2242 /* 4 for rfc1002 length field */
2243 req->DataOffset = cpu_to_le16(
2244 offsetof(struct smb2_write_req, Buffer) - 4);
2245 req->RemainingBytes = 0;
2246
2247 /* 4 for rfc1002 length field and 1 for Buffer */
eddb079d
JL		 2248 iov.iov_len = get_rfc1002_length(req) + 4 - 1;
2249 iov.iov_base = req;
33319141 2250
eddb079d
JL		 2251 rqst.rq_iov = &iov;
2252 rqst.rq_nvec = 1;
2253 rqst.rq_pages = wdata->pages;
2254 rqst.rq_npages = wdata->nr_pages;
2255 rqst.rq_pagesz = wdata->pagesz;
2256 rqst.rq_tailsz = wdata->tailsz;
33319141 2257
f96637be
JP		 2258 cifs_dbg(FYI, "async write at %llu %u bytes\n",
2259 wdata->offset, wdata->bytes);
33319141
PS		 2260
2261 req->Length = cpu_to_le32(wdata->bytes);
2262
2263 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
2264
cb7e9eab
PS		 2265 if (wdata->credits) {
2266 req->hdr.CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
2267 SMB2_MAX_BUFFER_SIZE));
c0432fc7 2268 req->hdr.CreditRequest = req->hdr.CreditCharge;
cb7e9eab
PS		 2269 spin_lock(&server->req_lock);
2270 server->credits += wdata->credits -
2271 le16_to_cpu(req->hdr.CreditCharge);
2272 spin_unlock(&server->req_lock);
2273 wake_up(&server->request_q);
2274 flags = CIFS_HAS_CREDITS;
2275 }
2276
33319141 2277 kref_get(&wdata->refcount);
cb7e9eab
PS		 2278 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, wdata,
2279 flags);
33319141 2280
e5d04887 2281 if (rc) {
4a5c80d7 2282 kref_put(&wdata->refcount, release);
e5d04887
PS		 2283 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2284 }
33319141 2285
33319141
PS		 2286async_writev_out:
2287 cifs_small_buf_release(req);
33319141
PS		 2288 return rc;
2289}
009d3443
PS		 2290
2291/*
2292 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2293 * The length field from io_parms must be at least 1 and indicates a number of
2294 * elements with data to write that begins with position 1 in iov array. All
2295 * data length is specified by count.
2296 */
2297int
2298SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
2299 unsigned int *nbytes, struct kvec *iov, int n_vec)
2300{
2301 int rc = 0;
2302 struct smb2_write_req *req = NULL;
2303 struct smb2_write_rsp *rsp = NULL;
2304 int resp_buftype;
2305 *nbytes = 0;
2306
2307 if (n_vec < 1)
2308 return rc;
2309
2310 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
2311 if (rc)
2312 return rc;
2313
2314 if (io_parms->tcon->ses->server == NULL)
2315 return -ECONNABORTED;
2316
2317 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
2318
2319 req->PersistentFileId = io_parms->persistent_fid;
2320 req->VolatileFileId = io_parms->volatile_fid;
2321 req->WriteChannelInfoOffset = 0;
2322 req->WriteChannelInfoLength = 0;
2323 req->Channel = 0;
2324 req->Length = cpu_to_le32(io_parms->length);
2325 req->Offset = cpu_to_le64(io_parms->offset);
2326 /* 4 for rfc1002 length field */
2327 req->DataOffset = cpu_to_le16(
2328 offsetof(struct smb2_write_req, Buffer) - 4);
2329 req->RemainingBytes = 0;
2330
2331 iov[0].iov_base = (char *)req;
2332 /* 4 for rfc1002 length field and 1 for Buffer */
2333 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2334
2335 /* length of entire message including data to be written */
2336 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
2337
2338 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
2339 &resp_buftype, 0);
e5d04887 2340 rsp = (struct smb2_write_rsp *)iov[0].iov_base;
009d3443
PS		 2341
2342 if (rc) {
2343 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
f96637be 2344 cifs_dbg(VFS, "Send error in write = %d\n", rc);
e5d04887 2345 } else
009d3443 2346 *nbytes = le32_to_cpu(rsp->DataLength);
e5d04887
PS		 2347
2348 free_rsp_buf(resp_buftype, rsp);
009d3443
PS		 2349 return rc;
2350}
35143eb5 2351
d324f08d
PS		 2352static unsigned int
2353num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
2354{
2355 int len;
2356 unsigned int entrycount = 0;
2357 unsigned int next_offset = 0;
2358 FILE_DIRECTORY_INFO *entryptr;
2359
2360 if (bufstart == NULL)
2361 return 0;
2362
2363 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
2364
2365 while (1) {
2366 entryptr = (FILE_DIRECTORY_INFO *)
2367 ((char *)entryptr + next_offset);
2368
2369 if ((char *)entryptr + size > end_of_buf) {
f96637be 2370 cifs_dbg(VFS, "malformed search entry would overflow\n");
d324f08d
PS		 2371 break;
2372 }
2373
2374 len = le32_to_cpu(entryptr->FileNameLength);
2375 if ((char *)entryptr + len + size > end_of_buf) {
f96637be
JP		 2376 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
2377 end_of_buf);
d324f08d
PS		 2378 break;
2379 }
2380
2381 *lastentry = (char *)entryptr;
2382 entrycount++;
2383
2384 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
2385 if (!next_offset)
2386 break;
2387 }
2388
2389 return entrycount;
2390}
2391
2392/*
2393 * Readdir/FindFirst
2394 */
2395int
2396SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
2397 u64 persistent_fid, u64 volatile_fid, int index,
2398 struct cifs_search_info *srch_inf)
2399{
2400 struct smb2_query_directory_req *req;
2401 struct smb2_query_directory_rsp *rsp = NULL;
2402 struct kvec iov[2];
2403 int rc = 0;
2404 int len;
75fdfc84 2405 int resp_buftype = CIFS_NO_BUFFER;
d324f08d
PS		 2406 unsigned char *bufptr;
2407 struct TCP_Server_Info *server;
2408 struct cifs_ses *ses = tcon->ses;
2409 __le16 asteriks = cpu_to_le16('*');
2410 char *end_of_smb;
2411 unsigned int output_size = CIFSMaxBufSize;
2412 size_t info_buf_size;
2413
2414 if (ses && (ses->server))
2415 server = ses->server;
2416 else
2417 return -EIO;
2418
2419 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
2420 if (rc)
2421 return rc;
2422
2423 switch (srch_inf->info_level) {
2424 case SMB_FIND_FILE_DIRECTORY_INFO:
2425 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
2426 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
2427 break;
2428 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
2429 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
2430 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
2431 break;
2432 default:
f96637be
JP		 2433 cifs_dbg(VFS, "info level %u isn't supported\n",
2434 srch_inf->info_level);
d324f08d
PS		 2435 rc = -EINVAL;
2436 goto qdir_exit;
2437 }
2438
2439 req->FileIndex = cpu_to_le32(index);
2440 req->PersistentFileId = persistent_fid;
2441 req->VolatileFileId = volatile_fid;
2442
2443 len = 0x2;
2444 bufptr = req->Buffer;
2445 memcpy(bufptr, &asteriks, len);
2446
2447 req->FileNameOffset =
2448 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
2449 req->FileNameLength = cpu_to_le16(len);
2450 /*
2451 * BB could be 30 bytes or so longer if we used SMB2 specific
2452 * buffer lengths, but this is safe and close enough.
2453 */
2454 output_size = min_t(unsigned int, output_size, server->maxBuf);
2455 output_size = min_t(unsigned int, output_size, 2 << 15);
2456 req->OutputBufferLength = cpu_to_le32(output_size);
2457
2458 iov[0].iov_base = (char *)req;
2459 /* 4 for RFC1001 length and 1 for Buffer */
2460 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2461
2462 iov[1].iov_base = (char *)(req->Buffer);
2463 iov[1].iov_len = len;
2464
2465 inc_rfc1001_len(req, len - 1 /* Buffer */);
2466
2467 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
e5d04887
PS		 2468 rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base;
2469
d324f08d 2470 if (rc) {
52755808
PS		 2471 if (rc == -ENODATA && rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2472 srch_inf->endOfSearch = true;
2473 rc = 0;
2474 }
d324f08d
PS		 2475 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
2476 goto qdir_exit;
2477 }
d324f08d
PS		 2478
2479 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2480 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2481 info_buf_size);
2482 if (rc)
2483 goto qdir_exit;
2484
2485 srch_inf->unicode = true;
2486
2487 if (srch_inf->ntwrk_buf_start) {
2488 if (srch_inf->smallBuf)
2489 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
2490 else
2491 cifs_buf_release(srch_inf->ntwrk_buf_start);
2492 }
2493 srch_inf->ntwrk_buf_start = (char *)rsp;
2494 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
2495 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
2496 /* 4 for rfc1002 length field */
2497 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
2498 srch_inf->entries_in_buffer =
2499 num_entries(srch_inf->srch_entries_start, end_of_smb,
2500 &srch_inf->last_entry, info_buf_size);
2501 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
f96637be
JP		 2502 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
2503 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
2504 srch_inf->srch_entries_start, srch_inf->last_entry);
d324f08d
PS		 2505 if (resp_buftype == CIFS_LARGE_BUFFER)
2506 srch_inf->smallBuf = false;
2507 else if (resp_buftype == CIFS_SMALL_BUFFER)
2508 srch_inf->smallBuf = true;
2509 else
f96637be 2510 cifs_dbg(VFS, "illegal search buffer type\n");
d324f08d 2511
d324f08d
PS		 2512 return rc;
2513
2514qdir_exit:
2515 free_rsp_buf(resp_buftype, rsp);
2516 return rc;
2517}
2518
35143eb5
PS		 2519static int
2520send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
c839ff24 2521 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
35143eb5
PS		 2522 unsigned int num, void **data, unsigned int *size)
2523{
2524 struct smb2_set_info_req *req;
2525 struct smb2_set_info_rsp *rsp = NULL;
2526 struct kvec *iov;
2527 int rc = 0;
2528 int resp_buftype;
2529 unsigned int i;
2530 struct TCP_Server_Info *server;
2531 struct cifs_ses *ses = tcon->ses;
2532
2533 if (ses && (ses->server))
2534 server = ses->server;
2535 else
2536 return -EIO;
2537
2538 if (!num)
2539 return -EINVAL;
2540
2541 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
2542 if (!iov)
2543 return -ENOMEM;
2544
2545 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
2546 if (rc) {
2547 kfree(iov);
2548 return rc;
2549 }
2550
c839ff24
PS		 2551 req->hdr.ProcessId = cpu_to_le32(pid);
2552
35143eb5
PS		 2553 req->InfoType = SMB2_O_INFO_FILE;
2554 req->FileInfoClass = info_class;
2555 req->PersistentFileId = persistent_fid;
2556 req->VolatileFileId = volatile_fid;
2557
2558 /* 4 for RFC1001 length and 1 for Buffer */
2559 req->BufferOffset =
2560 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
2561 req->BufferLength = cpu_to_le32(*size);
2562
2563 inc_rfc1001_len(req, *size - 1 /* Buffer */);
2564
2565 memcpy(req->Buffer, *data, *size);
2566
2567 iov[0].iov_base = (char *)req;
2568 /* 4 for RFC1001 length */
2569 iov[0].iov_len = get_rfc1002_length(req) + 4;
2570
2571 for (i = 1; i < num; i++) {
2572 inc_rfc1001_len(req, size[i]);
2573 le32_add_cpu(&req->BufferLength, size[i]);
2574 iov[i].iov_base = (char *)data[i];
2575 iov[i].iov_len = size[i];
2576 }
2577
2578 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0);
2579 rsp = (struct smb2_set_info_rsp *)iov[0].iov_base;
2580
7d3fb24b 2581 if (rc != 0)
35143eb5 2582 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
7d3fb24b 2583
35143eb5
PS		 2584 free_rsp_buf(resp_buftype, rsp);
2585 kfree(iov);
2586 return rc;
2587}
2588
2589int
2590SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
2591 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2592{
2593 struct smb2_file_rename_info info;
2594 void **data;
2595 unsigned int size[2];
2596 int rc;
2597 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2598
2599 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2600 if (!data)
2601 return -ENOMEM;
2602
2603 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
2604 /* 0 = fail if target already exists */
2605 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2606 info.FileNameLength = cpu_to_le32(len);
2607
2608 data[0] = &info;
2609 size[0] = sizeof(struct smb2_file_rename_info);
2610
2611 data[1] = target_file;
2612 size[1] = len + 2 /* null */;
2613
2614 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
c839ff24
PS		 2615 current->tgid, FILE_RENAME_INFORMATION, 2, data,
2616 size);
35143eb5
PS		 2617 kfree(data);
2618 return rc;
2619}
568798cc 2620
46707af0
SF		 2621int
2622SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
2623 u64 persistent_fid, u64 volatile_fid)
2624{
2625 __u8 delete_pending = 1;
2626 void *data;
2627 unsigned int size;
2628
2629 data = &delete_pending;
2630 size = 1; /* sizeof __u8 */
2631
2632 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2633 current->tgid, FILE_DISPOSITION_INFORMATION, 1, &data,
2634 &size);
2635}
2636
568798cc
PS		 2637int
2638SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
2639 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2640{
2641 struct smb2_file_link_info info;
2642 void **data;
2643 unsigned int size[2];
2644 int rc;
2645 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2646
2647 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2648 if (!data)
2649 return -ENOMEM;
2650
2651 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
2652 /* 0 = fail if link already exists */
2653 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2654 info.FileNameLength = cpu_to_le32(len);
2655
2656 data[0] = &info;
2657 size[0] = sizeof(struct smb2_file_link_info);
2658
2659 data[1] = target_file;
2660 size[1] = len + 2 /* null */;
2661
2662 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
c839ff24 2663 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
568798cc
PS		 2664 kfree(data);
2665 return rc;
2666}
c839ff24
PS		 2667
2668int
2669SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
f29ebb47 2670 u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc)
c839ff24
PS		 2671{
2672 struct smb2_file_eof_info info;
2673 void *data;
2674 unsigned int size;
2675
2676 info.EndOfFile = *eof;
2677
2678 data = &info;
2679 size = sizeof(struct smb2_file_eof_info);
2680
f29ebb47
SF		 2681 if (is_falloc)
2682 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2683 pid, FILE_ALLOCATION_INFORMATION, 1, &data, &size);
2684 else
2685 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2686 pid, FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
c839ff24 2687}
1feeaac7
PS		 2688
2689int
2690SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2691 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
2692{
2693 unsigned int size;
2694 size = sizeof(FILE_BASIC_INFO);
2695 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2696 current->tgid, FILE_BASIC_INFORMATION, 1,
2697 (void **)&buf, &size);
2698}
983c88a4
PS		 2699
2700int
2701SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
2702 const u64 persistent_fid, const u64 volatile_fid,
2703 __u8 oplock_level)
2704{
2705 int rc;
2706 struct smb2_oplock_break *req = NULL;
2707
f96637be 2708 cifs_dbg(FYI, "SMB2_oplock_break\n");
983c88a4
PS		 2709 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2710
2711 if (rc)
2712 return rc;
2713
2714 req->VolatileFid = volatile_fid;
2715 req->PersistentFid = persistent_fid;
2716 req->OplockLevel = oplock_level;
2717 req->hdr.CreditRequest = cpu_to_le16(1);
2718
2719 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2720 /* SMB2 buffer freed by function above */
2721
2722 if (rc) {
2723 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 2724 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
983c88a4
PS		 2725 }
2726
2727 return rc;
2728}
6fc05c25
PS		 2729
2730static void
2731copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
2732 struct kstatfs *kst)
2733{
2734 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
2735 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
2736 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
2737 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
2738 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
2739 return;
2740}
2741
2742static int
2743build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
2744 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
2745{
2746 int rc;
2747 struct smb2_query_info_req *req;
2748
f96637be 2749 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
6fc05c25
PS		 2750
2751 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
2752 return -EIO;
2753
2754 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2755 if (rc)
2756 return rc;
2757
2758 req->InfoType = SMB2_O_INFO_FILESYSTEM;
2759 req->FileInfoClass = level;
2760 req->PersistentFileId = persistent_fid;
2761 req->VolatileFileId = volatile_fid;
2762 /* 4 for rfc1002 length field and 1 for pad */
2763 req->InputBufferOffset =
2764 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
2765 req->OutputBufferLength = cpu_to_le32(
2766 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
2767
2768 iov->iov_base = (char *)req;
2769 /* 4 for rfc1002 length field */
2770 iov->iov_len = get_rfc1002_length(req) + 4;
2771 return 0;
2772}
2773
2774int
2775SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
2776 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
2777{
2778 struct smb2_query_info_rsp *rsp = NULL;
2779 struct kvec iov;
2780 int rc = 0;
2781 int resp_buftype;
2782 struct cifs_ses *ses = tcon->ses;
2783 struct smb2_fs_full_size_info *info = NULL;
2784
2785 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
2786 sizeof(struct smb2_fs_full_size_info),
2787 persistent_fid, volatile_fid);
2788 if (rc)
2789 return rc;
2790
2791 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2792 if (rc) {
2793 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
34f62640 2794 goto qfsinf_exit;
6fc05c25
PS		 2795 }
2796 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2797
2798 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
2799 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
2800 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2801 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2802 sizeof(struct smb2_fs_full_size_info));
2803 if (!rc)
2804 copy_fs_info_to_kstatfs(info, fsdata);
2805
34f62640
SF		 2806qfsinf_exit:
2807 free_rsp_buf(resp_buftype, iov.iov_base);
2808 return rc;
2809}
2810
2811int
2812SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2167114c 2813 u64 persistent_fid, u64 volatile_fid, int level)
34f62640
SF		 2814{
2815 struct smb2_query_info_rsp *rsp = NULL;
2816 struct kvec iov;
2817 int rc = 0;
2167114c 2818 int resp_buftype, max_len, min_len;
34f62640
SF		 2819 struct cifs_ses *ses = tcon->ses;
2820 unsigned int rsp_len, offset;
2821
2167114c
SF		 2822 if (level == FS_DEVICE_INFORMATION) {
2823 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2824 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2825 } else if (level == FS_ATTRIBUTE_INFORMATION) {
2826 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
2827 min_len = MIN_FS_ATTR_INFO_SIZE;
af6a12ea
SF		 2828 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
2829 max_len = sizeof(struct smb3_fs_ss_info);
2830 min_len = sizeof(struct smb3_fs_ss_info);
2167114c 2831 } else {
af6a12ea 2832 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2167114c
SF		 2833 return -EINVAL;
2834 }
2835
2836 rc = build_qfs_info_req(&iov, tcon, level, max_len,
34f62640
SF		 2837 persistent_fid, volatile_fid);
2838 if (rc)
2839 return rc;
2840
2841 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2842 if (rc) {
2843 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2844 goto qfsattr_exit;
2845 }
2846 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2847
2848 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
2849 offset = le16_to_cpu(rsp->OutputBufferOffset);
2167114c
SF		 2850 rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
2851 if (rc)
2852 goto qfsattr_exit;
2853
2854 if (level == FS_ATTRIBUTE_INFORMATION)
34f62640
SF		 2855 memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
2856 + (char *)&rsp->hdr, min_t(unsigned int,
2167114c
SF		 2857 rsp_len, max_len));
2858 else if (level == FS_DEVICE_INFORMATION)
2859 memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
2860 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
af6a12ea
SF		 2861 else if (level == FS_SECTOR_SIZE_INFORMATION) {
2862 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
2863 (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
2864 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
2865 tcon->perf_sector_size =
2866 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
2867 }
34f62640
SF		 2868
2869qfsattr_exit:
6fc05c25
PS		 2870 free_rsp_buf(resp_buftype, iov.iov_base);
2871 return rc;
2872}
f7ba7fe6
PS		 2873
2874int
2875smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
2876 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2877 const __u32 num_lock, struct smb2_lock_element *buf)
2878{
2879 int rc = 0;
2880 struct smb2_lock_req *req = NULL;
2881 struct kvec iov[2];
2882 int resp_buf_type;
2883 unsigned int count;
2884
f96637be 2885 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
f7ba7fe6
PS		 2886
2887 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
2888 if (rc)
2889 return rc;
2890
2891 req->hdr.ProcessId = cpu_to_le32(pid);
2892 req->LockCount = cpu_to_le16(num_lock);
2893
2894 req->PersistentFileId = persist_fid;
2895 req->VolatileFileId = volatile_fid;
2896
2897 count = num_lock * sizeof(struct smb2_lock_element);
2898 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
2899
2900 iov[0].iov_base = (char *)req;
2901 /* 4 for rfc1002 length field and count for all locks */
2902 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
2903 iov[1].iov_base = (char *)buf;
2904 iov[1].iov_len = count;
2905
2906 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
2907 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP);
2908 if (rc) {
f96637be 2909 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
f7ba7fe6
PS		 2910 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
2911 }
2912
2913 return rc;
2914}
2915
2916int
2917SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
2918 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2919 const __u64 length, const __u64 offset, const __u32 lock_flags,
2920 const bool wait)
2921{
2922 struct smb2_lock_element lock;
2923
2924 lock.Offset = cpu_to_le64(offset);
2925 lock.Length = cpu_to_le64(length);
2926 lock.Flags = cpu_to_le32(lock_flags);
2927 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
2928 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
2929
2930 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
2931}
0822f514
PS		 2932
2933int
2934SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
2935 __u8 *lease_key, const __le32 lease_state)
2936{
2937 int rc;
2938 struct smb2_lease_ack *req = NULL;
2939
f96637be 2940 cifs_dbg(FYI, "SMB2_lease_break\n");
0822f514
PS		 2941 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2942
2943 if (rc)
2944 return rc;
2945
2946 req->hdr.CreditRequest = cpu_to_le16(1);
2947 req->StructureSize = cpu_to_le16(36);
2948 inc_rfc1001_len(req, 12);
2949
2950 memcpy(req->LeaseKey, lease_key, 16);
2951 req->LeaseState = lease_state;
2952
2953 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2954 /* SMB2 buffer freed by function above */
2955
2956 if (rc) {
2957 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 2958 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
0822f514
PS		 2959 }
2960
2961 return rc;
2962}
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