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CIFS: Send RFC1001 length in a separate iov
[thirdparty/linux.git] / fs / cifs / smb2pdu.c
CommitLineData
ec2e4523
PS		 1/*
2 * fs/cifs/smb2pdu.c
3 *
2b80d049 4 * Copyright (C) International Business Machines Corp., 2009, 2013
ec2e4523
PS		 5 * Etersoft, 2012
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
8 *
9 * Contains the routines for constructing the SMB2 PDUs themselves
10 *
11 * This library is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published
13 * by the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
15 *
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
19 * the GNU Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 */
25
26 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
27 /* Note that there are handle based routines which must be */
28 /* treated slightly differently for reconnection purposes since we never */
29 /* want to reuse a stale file handle and only the caller knows the file info */
30
31#include <linux/fs.h>
32#include <linux/kernel.h>
33#include <linux/vfs.h>
09a4707e 34#include <linux/task_io_accounting_ops.h>
ec2e4523 35#include <linux/uaccess.h>
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;
31473fc4 86 struct smb2_sync_hdr *shdr = get_sync_hdr(hdr);
ec2e4523
PS		 87 char *temp = (char *)hdr;
88 /* lookup word count ie StructureSize from table */
89 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_cmd)];
90
91 /*
92 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
93 * largest operations (Create)
94 */
95 memset(temp, 0, 256);
96
97 /* Note this is only network field converted to big endian */
31473fc4
PS		 98 hdr->smb2_buf_length =
99 cpu_to_be32(parmsize + sizeof(struct smb2_sync_hdr));
ec2e4523 100
31473fc4
PS		 101 shdr->ProtocolId = SMB2_PROTO_NUMBER;
102 shdr->StructureSize = cpu_to_le16(64);
103 shdr->Command = smb2_cmd;
7d414f39
RL		 104 if (tcon && tcon->ses && tcon->ses->server) {
105 struct TCP_Server_Info *server = tcon->ses->server;
106
107 spin_lock(&server->req_lock);
108 /* Request up to 2 credits but don't go over the limit. */
141891f4 109 if (server->credits >= server->max_credits)
31473fc4 110 shdr->CreditRequest = cpu_to_le16(0);
7d414f39 111 else
31473fc4 112 shdr->CreditRequest = cpu_to_le16(
141891f4 113 min_t(int, server->max_credits -
7d414f39
RL		 114 server->credits, 2));
115 spin_unlock(&server->req_lock);
116 } else {
31473fc4 117 shdr->CreditRequest = cpu_to_le16(2);
7d414f39 118 }
31473fc4 119 shdr->ProcessId = cpu_to_le32((__u16)current->tgid);
ec2e4523
PS		 120
121 if (!tcon)
122 goto out;
123
2b80d049
SF		 124 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
125 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
1dc92c45 126 if ((tcon->ses) && (tcon->ses->server) &&
84ceeb96 127 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
31473fc4 128 shdr->CreditCharge = cpu_to_le16(1);
2b80d049
SF		 129 /* else CreditCharge MBZ */
130
31473fc4 131 shdr->TreeId = tcon->tid;
ec2e4523
PS		 132 /* Uid is not converted */
133 if (tcon->ses)
31473fc4 134 shdr->SessionId = tcon->ses->Suid;
f87ab88b
SF		 135
136 /*
137 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
138 * to pass the path on the Open SMB prefixed by \\server\share.
139 * Not sure when we would need to do the augmented path (if ever) and
140 * setting this flag breaks the SMB2 open operation since it is
141 * illegal to send an empty path name (without \\server\share prefix)
142 * when the DFS flag is set in the SMB open header. We could
143 * consider setting the flag on all operations other than open
144 * but it is safer to net set it for now.
145 */
146/* if (tcon->share_flags & SHI1005_FLAGS_DFS)
31473fc4 147 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
f87ab88b 148
38d77c50 149 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign)
31473fc4 150 shdr->Flags |= SMB2_FLAGS_SIGNED;
ec2e4523
PS		 151out:
152 pdu->StructureSize2 = cpu_to_le16(parmsize);
153 return;
154}
155
156static int
157smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
158{
159 int rc = 0;
aa24d1e9
PS		 160 struct nls_table *nls_codepage;
161 struct cifs_ses *ses;
162 struct TCP_Server_Info *server;
163
164 /*
165 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
166 * check for tcp and smb session status done differently
167 * for those three - in the calling routine.
168 */
169 if (tcon == NULL)
170 return rc;
171
172 if (smb2_command == SMB2_TREE_CONNECT)
173 return rc;
174
175 if (tcon->tidStatus == CifsExiting) {
176 /*
177 * only tree disconnect, open, and write,
178 * (and ulogoff which does not have tcon)
179 * are allowed as we start force umount.
180 */
181 if ((smb2_command != SMB2_WRITE) &&
182 (smb2_command != SMB2_CREATE) &&
183 (smb2_command != SMB2_TREE_DISCONNECT)) {
f96637be
JP		 184 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
185 smb2_command);
aa24d1e9
PS		 186 return -ENODEV;
187 }
188 }
189 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
190 (!tcon->ses->server))
191 return -EIO;
192
193 ses = tcon->ses;
194 server = ses->server;
195
196 /*
197 * Give demultiplex thread up to 10 seconds to reconnect, should be
198 * greater than cifs socket timeout which is 7 seconds
199 */
200 while (server->tcpStatus == CifsNeedReconnect) {
201 /*
202 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
203 * here since they are implicitly done when session drops.
204 */
205 switch (smb2_command) {
206 /*
207 * BB Should we keep oplock break and add flush to exceptions?
208 */
209 case SMB2_TREE_DISCONNECT:
210 case SMB2_CANCEL:
211 case SMB2_CLOSE:
212 case SMB2_OPLOCK_BREAK:
213 return -EAGAIN;
214 }
215
216 wait_event_interruptible_timeout(server->response_q,
217 (server->tcpStatus != CifsNeedReconnect), 10 * HZ);
218
219 /* are we still trying to reconnect? */
220 if (server->tcpStatus != CifsNeedReconnect)
221 break;
222
223 /*
224 * on "soft" mounts we wait once. Hard mounts keep
225 * retrying until process is killed or server comes
226 * back on-line
227 */
228 if (!tcon->retry) {
f96637be 229 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
aa24d1e9
PS		 230 return -EHOSTDOWN;
231 }
232 }
233
234 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
235 return rc;
236
237 nls_codepage = load_nls_default();
238
239 /*
240 * need to prevent multiple threads trying to simultaneously reconnect
241 * the same SMB session
242 */
243 mutex_lock(&tcon->ses->session_mutex);
244 rc = cifs_negotiate_protocol(0, tcon->ses);
245 if (!rc && tcon->ses->need_reconnect)
246 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
247
248 if (rc || !tcon->need_reconnect) {
249 mutex_unlock(&tcon->ses->session_mutex);
250 goto out;
251 }
252
253 cifs_mark_open_files_invalid(tcon);
96a988ff
PS		 254 if (tcon->use_persistent)
255 tcon->need_reopen_files = true;
52ace1ef 256
aa24d1e9
PS		 257 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
258 mutex_unlock(&tcon->ses->session_mutex);
52ace1ef 259
f96637be 260 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
aa24d1e9
PS		 261 if (rc)
262 goto out;
96a988ff
PS		 263
264 if (smb2_command != SMB2_INTERNAL_CMD)
265 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
266
aa24d1e9 267 atomic_inc(&tconInfoReconnectCount);
aa24d1e9
PS		 268out:
269 /*
270 * Check if handle based operation so we know whether we can continue
271 * or not without returning to caller to reset file handle.
272 */
273 /*
274 * BB Is flush done by server on drop of tcp session? Should we special
275 * case it and skip above?
276 */
277 switch (smb2_command) {
278 case SMB2_FLUSH:
279 case SMB2_READ:
280 case SMB2_WRITE:
281 case SMB2_LOCK:
282 case SMB2_IOCTL:
283 case SMB2_QUERY_DIRECTORY:
284 case SMB2_CHANGE_NOTIFY:
285 case SMB2_QUERY_INFO:
286 case SMB2_SET_INFO:
4772c795 287 rc = -EAGAIN;
aa24d1e9
PS		 288 }
289 unload_nls(nls_codepage);
ec2e4523
PS		 290 return rc;
291}
292
293/*
294 * Allocate and return pointer to an SMB request hdr, and set basic
295 * SMB information in the SMB header. If the return code is zero, this
296 * function must have filled in request_buf pointer.
297 */
298static int
299small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
300 void **request_buf)
301{
302 int rc = 0;
303
304 rc = smb2_reconnect(smb2_command, tcon);
305 if (rc)
306 return rc;
307
308 /* BB eventually switch this to SMB2 specific small buf size */
309 *request_buf = cifs_small_buf_get();
310 if (*request_buf == NULL) {
311 /* BB should we add a retry in here if not a writepage? */
312 return -ENOMEM;
313 }
314
315 smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon);
316
317 if (tcon != NULL) {
318#ifdef CONFIG_CIFS_STATS2
ec2e4523
PS		 319 uint16_t com_code = le16_to_cpu(smb2_command);
320 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
ec2e4523
PS		 321#endif
322 cifs_stats_inc(&tcon->num_smbs_sent);
323 }
324
325 return rc;
326}
327
ebb3a9d4
SF		 328#ifdef CONFIG_CIFS_SMB311
329/* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
330#define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
331
332
333#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
334#define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
335
336static void
337build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
338{
339 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
340 pneg_ctxt->DataLength = cpu_to_le16(38);
341 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
342 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
343 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
344 pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
345}
346
347static void
348build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
349{
350 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
351 pneg_ctxt->DataLength = cpu_to_le16(6);
352 pneg_ctxt->CipherCount = cpu_to_le16(2);
353 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
354 pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM;
355}
356
357static void
358assemble_neg_contexts(struct smb2_negotiate_req *req)
359{
360
361 /* +4 is to account for the RFC1001 len field */
362 char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT + 4;
363
364 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
365 /* Add 2 to size to round to 8 byte boundary */
366 pneg_ctxt += 2 + sizeof(struct smb2_preauth_neg_context);
367 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
368 req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
369 req->NegotiateContextCount = cpu_to_le16(2);
370 inc_rfc1001_len(req, 4 + sizeof(struct smb2_preauth_neg_context) + 2
371 + sizeof(struct smb2_encryption_neg_context)); /* calculate hash */
372}
373#else
374static void assemble_neg_contexts(struct smb2_negotiate_req *req)
375{
376 return;
377}
378#endif /* SMB311 */
379
380
ec2e4523
PS		 381/*
382 *
383 * SMB2 Worker functions follow:
384 *
385 * The general structure of the worker functions is:
386 * 1) Call smb2_init (assembles SMB2 header)
387 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
388 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
389 * 4) Decode SMB2 command specific fields in the fixed length area
390 * 5) Decode variable length data area (if any for this SMB2 command type)
391 * 6) Call free smb buffer
392 * 7) return
393 *
394 */
395
396int
397SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
398{
399 struct smb2_negotiate_req *req;
400 struct smb2_negotiate_rsp *rsp;
401 struct kvec iov[1];
da502f7d 402 struct kvec rsp_iov;
ec2e4523
PS		 403 int rc = 0;
404 int resp_buftype;
3534b850 405 struct TCP_Server_Info *server = ses->server;
ec2e4523
PS		 406 int blob_offset, blob_length;
407 char *security_blob;
408 int flags = CIFS_NEG_OP;
409
f96637be 410 cifs_dbg(FYI, "Negotiate protocol\n");
ec2e4523 411
3534b850
JL		 412 if (!server) {
413 WARN(1, "%s: server is NULL!\n", __func__);
414 return -EIO;
ec2e4523
PS		 415 }
416
417 rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
418 if (rc)
419 return rc;
420
31473fc4 421 req->hdr.sync_hdr.SessionId = 0;
ec2e4523 422
e4aa25e7 423 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
ec2e4523 424
e4aa25e7
SF		 425 req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */
426 inc_rfc1001_len(req, 2);
ec2e4523
PS		 427
428 /* only one of SMB2 signing flags may be set in SMB2 request */
38d77c50 429 if (ses->sign)
9cd2e62c 430 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
38d77c50 431 else if (global_secflags & CIFSSEC_MAY_SIGN)
9cd2e62c 432 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
38d77c50
JL		 433 else
434 req->SecurityMode = 0;
ec2e4523 435
e4aa25e7 436 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
ec2e4523 437
3c5f9be1
SF		 438 /* ClientGUID must be zero for SMB2.02 dialect */
439 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
440 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
ebb3a9d4 441 else {
3c5f9be1
SF		 442 memcpy(req->ClientGUID, server->client_guid,
443 SMB2_CLIENT_GUID_SIZE);
ebb3a9d4
SF		 444 if (ses->server->vals->protocol_id == SMB311_PROT_ID)
445 assemble_neg_contexts(req);
446 }
ec2e4523
PS		 447 iov[0].iov_base = (char *)req;
448 /* 4 for rfc1002 length field */
449 iov[0].iov_len = get_rfc1002_length(req) + 4;
450
da502f7d
PS		 451 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
452 cifs_small_buf_release(req);
453 rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base;
ec2e4523
PS		 454 /*
455 * No tcon so can't do
456 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
457 */
458 if (rc != 0)
459 goto neg_exit;
460
f96637be 461 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
ec2e4523 462
e4aa25e7
SF		 463 /* BB we may eventually want to match the negotiated vs. requested
464 dialect, even though we are only requesting one at a time */
465 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
f96637be 466 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
e4aa25e7 467 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
f96637be 468 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
e4aa25e7 469 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
f96637be 470 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
20b6d8b4
SF		 471 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
472 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
5f7fbf73
SF		 473#ifdef CONFIG_CIFS_SMB311
474 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
475 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
476#endif /* SMB311 */
ec2e4523 477 else {
f799d623 478 cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
f96637be 479 le16_to_cpu(rsp->DialectRevision));
ec2e4523
PS		 480 rc = -EIO;
481 goto neg_exit;
482 }
483 server->dialect = le16_to_cpu(rsp->DialectRevision);
484
e598d1d8
JL		 485 /* SMB2 only has an extended negflavor */
486 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
2365c4ea
PS		 487 /* set it to the maximum buffer size value we can send with 1 credit */
488 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
489 SMB2_MAX_BUFFER_SIZE);
ec2e4523
PS		 490 server->max_read = le32_to_cpu(rsp->MaxReadSize);
491 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
492 /* BB Do we need to validate the SecurityMode? */
493 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
494 server->capabilities = le32_to_cpu(rsp->Capabilities);
29e20f9c
PS		 495 /* Internal types */
496 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
ec2e4523
PS		 497
498 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
499 &rsp->hdr);
5d875cc9
SF		 500 /*
501 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
502 * for us will be
503 * ses->sectype = RawNTLMSSP;
504 * but for time being this is our only auth choice so doesn't matter.
505 * We just found a server which sets blob length to zero expecting raw.
506 */
507 if (blob_length == 0)
508 cifs_dbg(FYI, "missing security blob on negprot\n");
3c1bf7e4 509
38d77c50 510 rc = cifs_enable_signing(server, ses->sign);
9ddec561
JL		 511 if (rc)
512 goto neg_exit;
ceb1b0b9 513 if (blob_length) {
ebdd207e 514 rc = decode_negTokenInit(security_blob, blob_length, server);
ceb1b0b9
SF		 515 if (rc == 1)
516 rc = 0;
517 else if (rc == 0)
518 rc = -EIO;
ec2e4523 519 }
ec2e4523
PS		 520neg_exit:
521 free_rsp_buf(resp_buftype, rsp);
522 return rc;
523}
5478f9ba 524
ff1c038a
SF		 525int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
526{
527 int rc = 0;
528 struct validate_negotiate_info_req vneg_inbuf;
529 struct validate_negotiate_info_rsp *pneg_rsp;
530 u32 rsplen;
531
532 cifs_dbg(FYI, "validate negotiate\n");
533
534 /*
535 * validation ioctl must be signed, so no point sending this if we
536 * can not sign it. We could eventually change this to selectively
537 * sign just this, the first and only signed request on a connection.
538 * This is good enough for now since a user who wants better security
539 * would also enable signing on the mount. Having validation of
540 * negotiate info for signed connections helps reduce attack vectors
541 */
542 if (tcon->ses->server->sign == false)
543 return 0; /* validation requires signing */
544
545 vneg_inbuf.Capabilities =
546 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
39552ea8
SP		 547 memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid,
548 SMB2_CLIENT_GUID_SIZE);
ff1c038a
SF		 549
550 if (tcon->ses->sign)
551 vneg_inbuf.SecurityMode =
552 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
553 else if (global_secflags & CIFSSEC_MAY_SIGN)
554 vneg_inbuf.SecurityMode =
555 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
556 else
557 vneg_inbuf.SecurityMode = 0;
558
559 vneg_inbuf.DialectCount = cpu_to_le16(1);
560 vneg_inbuf.Dialects[0] =
561 cpu_to_le16(tcon->ses->server->vals->protocol_id);
562
563 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
564 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
565 (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
566 (char **)&pneg_rsp, &rsplen);
567
568 if (rc != 0) {
569 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
570 return -EIO;
571 }
572
573 if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
574 cifs_dbg(VFS, "invalid size of protocol negotiate response\n");
575 return -EIO;
576 }
577
578 /* check validate negotiate info response matches what we got earlier */
579 if (pneg_rsp->Dialect !=
580 cpu_to_le16(tcon->ses->server->vals->protocol_id))
581 goto vneg_out;
582
583 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
584 goto vneg_out;
585
586 /* do not validate server guid because not saved at negprot time yet */
587
588 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
589 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
590 goto vneg_out;
591
592 /* validate negotiate successful */
593 cifs_dbg(FYI, "validate negotiate info successful\n");
594 return 0;
595
596vneg_out:
597 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
598 return -EIO;
599}
600
3baf1a7b
SP		 601struct SMB2_sess_data {
602 unsigned int xid;
603 struct cifs_ses *ses;
604 struct nls_table *nls_cp;
605 void (*func)(struct SMB2_sess_data *);
606 int result;
607 u64 previous_session;
608
609 /* we will send the SMB in three pieces:
610 * a fixed length beginning part, an optional
611 * SPNEGO blob (which can be zero length), and a
612 * last part which will include the strings
613 * and rest of bcc area. This allows us to avoid
614 * a large buffer 17K allocation
615 */
616 int buf0_type;
617 struct kvec iov[2];
618};
619
620static int
621SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
622{
623 int rc;
624 struct cifs_ses *ses = sess_data->ses;
625 struct smb2_sess_setup_req *req;
626 struct TCP_Server_Info *server = ses->server;
627
628 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
629 if (rc)
630 return rc;
631
31473fc4
PS		 632 /* First session, not a reauthenticate */
633 req->hdr.sync_hdr.SessionId = 0;
3baf1a7b
SP		 634
635 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
636 req->PreviousSessionId = sess_data->previous_session;
637
638 req->Flags = 0; /* MBZ */
639 /* to enable echos and oplocks */
31473fc4 640 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(3);
3baf1a7b
SP		 641
642 /* only one of SMB2 signing flags may be set in SMB2 request */
643 if (server->sign)
644 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
645 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
646 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
647 else
648 req->SecurityMode = 0;
649
650 req->Capabilities = 0;
651 req->Channel = 0; /* MBZ */
652
653 sess_data->iov[0].iov_base = (char *)req;
654 /* 4 for rfc1002 length field and 1 for pad */
655 sess_data->iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
656 /*
657 * This variable will be used to clear the buffer
658 * allocated above in case of any error in the calling function.
659 */
660 sess_data->buf0_type = CIFS_SMALL_BUFFER;
661
662 return 0;
663}
664
665static void
666SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
667{
668 free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
669 sess_data->buf0_type = CIFS_NO_BUFFER;
670}
671
672static int
673SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
674{
675 int rc;
676 struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
da502f7d 677 struct kvec rsp_iov = { NULL, 0 };
3baf1a7b
SP		 678
679 /* Testing shows that buffer offset must be at location of Buffer[0] */
680 req->SecurityBufferOffset =
681 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
682 1 /* pad */ - 4 /* rfc1001 len */);
683 req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
684
685 inc_rfc1001_len(req, sess_data->iov[1].iov_len - 1 /* pad */);
686
687 /* BB add code to build os and lm fields */
688
689 rc = SendReceive2(sess_data->xid, sess_data->ses,
690 sess_data->iov, 2,
691 &sess_data->buf0_type,
da502f7d
PS		 692 CIFS_LOG_ERROR | CIFS_NEG_OP, &rsp_iov);
693 cifs_small_buf_release(sess_data->iov[0].iov_base);
694 memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
3baf1a7b
SP		 695
696 return rc;
697}
698
699static int
700SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
701{
702 int rc = 0;
703 struct cifs_ses *ses = sess_data->ses;
704
705 mutex_lock(&ses->server->srv_mutex);
706 if (ses->server->sign && ses->server->ops->generate_signingkey) {
707 rc = ses->server->ops->generate_signingkey(ses);
708 kfree(ses->auth_key.response);
709 ses->auth_key.response = NULL;
710 if (rc) {
711 cifs_dbg(FYI,
712 "SMB3 session key generation failed\n");
713 mutex_unlock(&ses->server->srv_mutex);
714 goto keygen_exit;
715 }
716 }
717 if (!ses->server->session_estab) {
718 ses->server->sequence_number = 0x2;
719 ses->server->session_estab = true;
720 }
721 mutex_unlock(&ses->server->srv_mutex);
722
723 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
724 spin_lock(&GlobalMid_Lock);
725 ses->status = CifsGood;
726 ses->need_reconnect = false;
727 spin_unlock(&GlobalMid_Lock);
728
729keygen_exit:
730 if (!ses->server->sign) {
731 kfree(ses->auth_key.response);
732 ses->auth_key.response = NULL;
733 }
734 return rc;
735}
736
737#ifdef CONFIG_CIFS_UPCALL
738static void
739SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
740{
741 int rc;
742 struct cifs_ses *ses = sess_data->ses;
743 struct cifs_spnego_msg *msg;
744 struct key *spnego_key = NULL;
745 struct smb2_sess_setup_rsp *rsp = NULL;
746
747 rc = SMB2_sess_alloc_buffer(sess_data);
748 if (rc)
749 goto out;
750
751 spnego_key = cifs_get_spnego_key(ses);
752 if (IS_ERR(spnego_key)) {
753 rc = PTR_ERR(spnego_key);
754 spnego_key = NULL;
755 goto out;
756 }
757
758 msg = spnego_key->payload.data[0];
759 /*
760 * check version field to make sure that cifs.upcall is
761 * sending us a response in an expected form
762 */
763 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
764 cifs_dbg(VFS,
765 "bad cifs.upcall version. Expected %d got %d",
766 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
767 rc = -EKEYREJECTED;
768 goto out_put_spnego_key;
769 }
770
771 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
772 GFP_KERNEL);
773 if (!ses->auth_key.response) {
774 cifs_dbg(VFS,
775 "Kerberos can't allocate (%u bytes) memory",
776 msg->sesskey_len);
777 rc = -ENOMEM;
778 goto out_put_spnego_key;
779 }
780 ses->auth_key.len = msg->sesskey_len;
781
782 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
783 sess_data->iov[1].iov_len = msg->secblob_len;
784
785 rc = SMB2_sess_sendreceive(sess_data);
786 if (rc)
787 goto out_put_spnego_key;
788
789 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
31473fc4 790 ses->Suid = rsp->hdr.sync_hdr.SessionId;
3baf1a7b
SP		 791
792 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
793 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
794 cifs_dbg(VFS, "SMB3 encryption not supported yet\n");
795
796 rc = SMB2_sess_establish_session(sess_data);
797out_put_spnego_key:
798 key_invalidate(spnego_key);
799 key_put(spnego_key);
800out:
801 sess_data->result = rc;
802 sess_data->func = NULL;
803 SMB2_sess_free_buffer(sess_data);
804}
805#else
806static void
807SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
808{
809 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
810 sess_data->result = -EOPNOTSUPP;
811 sess_data->func = NULL;
812}
813#endif
814
166cea4d
SP		 815static void
816SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
817
818static void
819SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
5478f9ba 820{
166cea4d
SP		 821 int rc;
822 struct cifs_ses *ses = sess_data->ses;
5478f9ba 823 struct smb2_sess_setup_rsp *rsp = NULL;
166cea4d 824 char *ntlmssp_blob = NULL;
5478f9ba 825 bool use_spnego = false; /* else use raw ntlmssp */
166cea4d 826 u16 blob_length = 0;
d4e63bd6 827
5478f9ba
PS		 828 /*
829 * If memory allocation is successful, caller of this function
830 * frees it.
831 */
832 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
166cea4d
SP		 833 if (!ses->ntlmssp) {
834 rc = -ENOMEM;
835 goto out_err;
836 }
5c234aa5 837 ses->ntlmssp->sesskey_per_smbsess = true;
5478f9ba 838
166cea4d 839 rc = SMB2_sess_alloc_buffer(sess_data);
5478f9ba 840 if (rc)
166cea4d 841 goto out_err;
5478f9ba 842
166cea4d
SP		 843 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
844 GFP_KERNEL);
845 if (ntlmssp_blob == NULL) {
846 rc = -ENOMEM;
847 goto out;
848 }
c2afb814 849
166cea4d
SP		 850 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
851 if (use_spnego) {
852 /* BB eventually need to add this */
853 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
854 rc = -EOPNOTSUPP;
855 goto out;
856 } else {
857 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
858 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
859 }
860 sess_data->iov[1].iov_base = ntlmssp_blob;
861 sess_data->iov[1].iov_len = blob_length;
c2afb814 862
166cea4d
SP		 863 rc = SMB2_sess_sendreceive(sess_data);
864 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
5478f9ba 865
166cea4d
SP		 866 /* If true, rc here is expected and not an error */
867 if (sess_data->buf0_type != CIFS_NO_BUFFER &&
31473fc4 868 rsp->hdr.sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
166cea4d 869 rc = 0;
38d77c50 870
166cea4d
SP		 871 if (rc)
872 goto out;
5478f9ba 873
166cea4d
SP		 874 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
875 le16_to_cpu(rsp->SecurityBufferOffset)) {
876 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
877 le16_to_cpu(rsp->SecurityBufferOffset));
5478f9ba 878 rc = -EIO;
166cea4d 879 goto out;
5478f9ba 880 }
166cea4d
SP		 881 rc = decode_ntlmssp_challenge(rsp->Buffer,
882 le16_to_cpu(rsp->SecurityBufferLength), ses);
883 if (rc)
884 goto out;
5478f9ba 885
166cea4d 886 cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
5478f9ba 887
5478f9ba 888
31473fc4 889 ses->Suid = rsp->hdr.sync_hdr.SessionId;
166cea4d
SP		 890 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
891 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
892 cifs_dbg(VFS, "SMB3 encryption not supported yet\n");
893
894out:
895 kfree(ntlmssp_blob);
896 SMB2_sess_free_buffer(sess_data);
897 if (!rc) {
898 sess_data->result = 0;
899 sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
900 return;
901 }
902out_err:
903 kfree(ses->ntlmssp);
904 ses->ntlmssp = NULL;
905 sess_data->result = rc;
906 sess_data->func = NULL;
907}
5478f9ba 908
166cea4d
SP		 909static void
910SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
911{
912 int rc;
913 struct cifs_ses *ses = sess_data->ses;
914 struct smb2_sess_setup_req *req;
915 struct smb2_sess_setup_rsp *rsp = NULL;
916 unsigned char *ntlmssp_blob = NULL;
917 bool use_spnego = false; /* else use raw ntlmssp */
918 u16 blob_length = 0;
5478f9ba 919
166cea4d
SP		 920 rc = SMB2_sess_alloc_buffer(sess_data);
921 if (rc)
922 goto out;
5478f9ba 923
166cea4d 924 req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
31473fc4 925 req->hdr.sync_hdr.SessionId = ses->Suid;
166cea4d
SP		 926
927 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
928 sess_data->nls_cp);
929 if (rc) {
930 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
931 goto out;
5478f9ba
PS		 932 }
933
166cea4d
SP		 934 if (use_spnego) {
935 /* BB eventually need to add this */
936 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
937 rc = -EOPNOTSUPP;
938 goto out;
939 }
940 sess_data->iov[1].iov_base = ntlmssp_blob;
941 sess_data->iov[1].iov_len = blob_length;
5478f9ba 942
166cea4d
SP		 943 rc = SMB2_sess_sendreceive(sess_data);
944 if (rc)
945 goto out;
946
947 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
948
31473fc4 949 ses->Suid = rsp->hdr.sync_hdr.SessionId;
5478f9ba 950 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
0cbaa53c
SF		 951 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
952 cifs_dbg(VFS, "SMB3 encryption not supported yet\n");
5478f9ba 953
166cea4d
SP		 954 rc = SMB2_sess_establish_session(sess_data);
955out:
956 kfree(ntlmssp_blob);
957 SMB2_sess_free_buffer(sess_data);
958 kfree(ses->ntlmssp);
959 ses->ntlmssp = NULL;
960 sess_data->result = rc;
961 sess_data->func = NULL;
962}
d4e63bd6 963
166cea4d
SP		 964static int
965SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data)
966{
967 if (ses->sectype != Kerberos && ses->sectype != RawNTLMSSP)
968 ses->sectype = RawNTLMSSP;
d4e63bd6 969
166cea4d
SP		 970 switch (ses->sectype) {
971 case Kerberos:
972 sess_data->func = SMB2_auth_kerberos;
973 break;
974 case RawNTLMSSP:
975 sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
976 break;
977 default:
978 cifs_dbg(VFS, "secType %d not supported!\n", ses->sectype);
979 return -EOPNOTSUPP;
d4e63bd6
SP		 980 }
981
166cea4d
SP		 982 return 0;
983}
984
985int
986SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
987 const struct nls_table *nls_cp)
988{
989 int rc = 0;
990 struct TCP_Server_Info *server = ses->server;
991 struct SMB2_sess_data *sess_data;
992
993 cifs_dbg(FYI, "Session Setup\n");
994
995 if (!server) {
996 WARN(1, "%s: server is NULL!\n", __func__);
997 return -EIO;
d4e63bd6 998 }
d4e63bd6 999
166cea4d
SP		 1000 sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
1001 if (!sess_data)
1002 return -ENOMEM;
1003
1004 rc = SMB2_select_sec(ses, sess_data);
1005 if (rc)
1006 goto out;
1007 sess_data->xid = xid;
1008 sess_data->ses = ses;
1009 sess_data->buf0_type = CIFS_NO_BUFFER;
1010 sess_data->nls_cp = (struct nls_table *) nls_cp;
1011
1012 while (sess_data->func)
1013 sess_data->func(sess_data);
1014
3baf1a7b 1015 rc = sess_data->result;
166cea4d 1016out:
3baf1a7b 1017 kfree(sess_data);
5478f9ba
PS		 1018 return rc;
1019}
1020
1021int
1022SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
1023{
1024 struct smb2_logoff_req *req; /* response is also trivial struct */
1025 int rc = 0;
1026 struct TCP_Server_Info *server;
1027
f96637be 1028 cifs_dbg(FYI, "disconnect session %p\n", ses);
5478f9ba
PS		 1029
1030 if (ses && (ses->server))
1031 server = ses->server;
1032 else
1033 return -EIO;
1034
eb4c7df6
SP		 1035 /* no need to send SMB logoff if uid already closed due to reconnect */
1036 if (ses->need_reconnect)
1037 goto smb2_session_already_dead;
1038
5478f9ba
PS		 1039 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
1040 if (rc)
1041 return rc;
1042
1043 /* since no tcon, smb2_init can not do this, so do here */
31473fc4 1044 req->hdr.sync_hdr.SessionId = ses->Suid;
38d77c50 1045 if (server->sign)
31473fc4 1046 req->hdr.sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
5478f9ba 1047
da502f7d
PS		 1048 rc = SendReceiveNoRsp(xid, ses, (char *) req, 0);
1049 cifs_small_buf_release(req);
5478f9ba
PS		 1050 /*
1051 * No tcon so can't do
1052 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1053 */
eb4c7df6
SP		 1054
1055smb2_session_already_dead:
5478f9ba
PS		 1056 return rc;
1057}
faaf946a
PS		 1058
1059static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
1060{
d60622eb 1061 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
faaf946a
PS		 1062}
1063
1064#define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1065
de9f68df
SF		 1066/* These are similar values to what Windows uses */
1067static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
1068{
1069 tcon->max_chunks = 256;
1070 tcon->max_bytes_chunk = 1048576;
1071 tcon->max_bytes_copy = 16777216;
1072}
1073
faaf946a
PS		 1074int
1075SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
1076 struct cifs_tcon *tcon, const struct nls_table *cp)
1077{
1078 struct smb2_tree_connect_req *req;
1079 struct smb2_tree_connect_rsp *rsp = NULL;
1080 struct kvec iov[2];
da502f7d 1081 struct kvec rsp_iov;
faaf946a
PS		 1082 int rc = 0;
1083 int resp_buftype;
1084 int unc_path_len;
1085 struct TCP_Server_Info *server;
1086 __le16 *unc_path = NULL;
1087
f96637be 1088 cifs_dbg(FYI, "TCON\n");
faaf946a
PS		 1089
1090 if ((ses->server) && tree)
1091 server = ses->server;
1092 else
1093 return -EIO;
1094
1095 if (tcon && tcon->bad_network_name)
1096 return -ENOENT;
1097
ff9f84b7 1098 if ((tcon && tcon->seal) &&
88627148
SF		 1099 ((ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) == 0)) {
1100 cifs_dbg(VFS, "encryption requested but no server support");
1101 return -EOPNOTSUPP;
1102 }
1103
faaf946a
PS		 1104 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
1105 if (unc_path == NULL)
1106 return -ENOMEM;
1107
1108 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
1109 unc_path_len *= 2;
1110 if (unc_path_len < 2) {
1111 kfree(unc_path);
1112 return -EINVAL;
1113 }
1114
1115 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
1116 if (rc) {
1117 kfree(unc_path);
1118 return rc;
1119 }
1120
1121 if (tcon == NULL) {
1122 /* since no tcon, smb2_init can not do this, so do here */
31473fc4 1123 req->hdr.sync_hdr.SessionId = ses->Suid;
faaf946a
PS		 1124 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
1125 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
1126 }
1127
1128 iov[0].iov_base = (char *)req;
1129 /* 4 for rfc1002 length field and 1 for pad */
1130 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1131
1132 /* Testing shows that buffer offset must be at location of Buffer[0] */
1133 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
1134 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
1135 req->PathLength = cpu_to_le16(unc_path_len - 2);
1136 iov[1].iov_base = unc_path;
1137 iov[1].iov_len = unc_path_len;
1138
1139 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
1140
da502f7d
PS		 1141 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0, &rsp_iov);
1142 cifs_small_buf_release(req);
1143 rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
faaf946a
PS		 1144
1145 if (rc != 0) {
1146 if (tcon) {
1147 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
1148 tcon->need_reconnect = true;
1149 }
1150 goto tcon_error_exit;
1151 }
1152
faaf946a 1153 if (tcon == NULL) {
31473fc4 1154 ses->ipc_tid = rsp->hdr.sync_hdr.TreeId;
faaf946a
PS		 1155 goto tcon_exit;
1156 }
1157
1158 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
f96637be 1159 cifs_dbg(FYI, "connection to disk share\n");
faaf946a
PS		 1160 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
1161 tcon->ipc = true;
f96637be 1162 cifs_dbg(FYI, "connection to pipe share\n");
faaf946a
PS		 1163 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
1164 tcon->print = true;
f96637be 1165 cifs_dbg(FYI, "connection to printer\n");
faaf946a 1166 } else {
f96637be 1167 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
faaf946a
PS		 1168 rc = -EOPNOTSUPP;
1169 goto tcon_error_exit;
1170 }
1171
1172 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
769ee6a4 1173 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
faaf946a
PS		 1174 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1175 tcon->tidStatus = CifsGood;
1176 tcon->need_reconnect = false;
31473fc4 1177 tcon->tid = rsp->hdr.sync_hdr.TreeId;
46b51d08 1178 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
faaf946a
PS		 1179
1180 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1181 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
f96637be 1182 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
de9f68df 1183 init_copy_chunk_defaults(tcon);
88627148
SF		 1184 if (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA)
1185 cifs_dbg(VFS, "Encrypted shares not supported");
ff1c038a
SF		 1186 if (tcon->ses->server->ops->validate_negotiate)
1187 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
faaf946a
PS		 1188tcon_exit:
1189 free_rsp_buf(resp_buftype, rsp);
1190 kfree(unc_path);
1191 return rc;
1192
1193tcon_error_exit:
31473fc4 1194 if (rsp->hdr.sync_hdr.Status == STATUS_BAD_NETWORK_NAME) {
f96637be 1195 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
18f39e7b
SF		 1196 if (tcon)
1197 tcon->bad_network_name = true;
faaf946a
PS		 1198 }
1199 goto tcon_exit;
1200}
1201
1202int
1203SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1204{
1205 struct smb2_tree_disconnect_req *req; /* response is trivial */
1206 int rc = 0;
1207 struct TCP_Server_Info *server;
1208 struct cifs_ses *ses = tcon->ses;
1209
f96637be 1210 cifs_dbg(FYI, "Tree Disconnect\n");
faaf946a
PS		 1211
1212 if (ses && (ses->server))
1213 server = ses->server;
1214 else
1215 return -EIO;
1216
1217 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1218 return 0;
1219
1220 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
1221 if (rc)
1222 return rc;
1223
da502f7d
PS		 1224 rc = SendReceiveNoRsp(xid, ses, (char *)req, 0);
1225 cifs_small_buf_release(req);
faaf946a
PS		 1226 if (rc)
1227 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1228
1229 return rc;
1230}
2503a0db 1231
b8c32dbb 1232
63eb3def
PS		 1233static struct create_durable *
1234create_durable_buf(void)
1235{
1236 struct create_durable *buf;
1237
1238 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1239 if (!buf)
1240 return NULL;
1241
1242 buf->ccontext.DataOffset = cpu_to_le16(offsetof
9cbc0b73 1243 (struct create_durable, Data));
63eb3def
PS		 1244 buf->ccontext.DataLength = cpu_to_le32(16);
1245 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1246 (struct create_durable, Name));
1247 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 1248 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
63eb3def
PS		 1249 buf->Name[0] = 'D';
1250 buf->Name[1] = 'H';
1251 buf->Name[2] = 'n';
1252 buf->Name[3] = 'Q';
1253 return buf;
1254}
1255
9cbc0b73
PS		 1256static struct create_durable *
1257create_reconnect_durable_buf(struct cifs_fid *fid)
1258{
1259 struct create_durable *buf;
1260
1261 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1262 if (!buf)
1263 return NULL;
1264
1265 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1266 (struct create_durable, Data));
1267 buf->ccontext.DataLength = cpu_to_le32(16);
1268 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1269 (struct create_durable, Name));
1270 buf->ccontext.NameLength = cpu_to_le16(4);
1271 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1272 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
12197a7f 1273 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
9cbc0b73
PS		 1274 buf->Name[0] = 'D';
1275 buf->Name[1] = 'H';
1276 buf->Name[2] = 'n';
1277 buf->Name[3] = 'C';
1278 return buf;
1279}
1280
b8c32dbb 1281static __u8
42873b0a
PS		 1282parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
1283 unsigned int *epoch)
b8c32dbb
PS		 1284{
1285 char *data_offset;
b5c7cde3 1286 struct create_context *cc;
deb7deff
JM		 1287 unsigned int next;
1288 unsigned int remaining;
fd554396 1289 char *name;
b8c32dbb 1290
fd554396 1291 data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
deb7deff 1292 remaining = le32_to_cpu(rsp->CreateContextsLength);
b5c7cde3 1293 cc = (struct create_context *)data_offset;
deb7deff 1294 while (remaining >= sizeof(struct create_context)) {
b5c7cde3 1295 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
deb7deff
JM		 1296 if (le16_to_cpu(cc->NameLength) == 4 &&
1297 strncmp(name, "RqLs", 4) == 0)
1298 return server->ops->parse_lease_buf(cc, epoch);
1299
1300 next = le32_to_cpu(cc->Next);
1301 if (!next)
1302 break;
1303 remaining -= next;
1304 cc = (struct create_context *)((char *)cc + next);
1305 }
b8c32dbb 1306
b5c7cde3 1307 return 0;
b8c32dbb
PS		 1308}
1309
d22cbfec 1310static int
a41a28bd
PS		 1311add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1312 unsigned int *num_iovec, __u8 *oplock)
d22cbfec
PS		 1313{
1314 struct smb2_create_req *req = iov[0].iov_base;
1315 unsigned int num = *num_iovec;
1316
a41a28bd 1317 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
d22cbfec
PS		 1318 if (iov[num].iov_base == NULL)
1319 return -ENOMEM;
a41a28bd 1320 iov[num].iov_len = server->vals->create_lease_size;
d22cbfec
PS		 1321 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1322 if (!req->CreateContextsOffset)
1323 req->CreateContextsOffset = cpu_to_le32(
1324 sizeof(struct smb2_create_req) - 4 +
1325 iov[num - 1].iov_len);
a41a28bd
PS		 1326 le32_add_cpu(&req->CreateContextsLength,
1327 server->vals->create_lease_size);
1328 inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
d22cbfec
PS		 1329 *num_iovec = num + 1;
1330 return 0;
1331}
1332
b56eae4d
SF		 1333static struct create_durable_v2 *
1334create_durable_v2_buf(struct cifs_fid *pfid)
1335{
1336 struct create_durable_v2 *buf;
1337
1338 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
1339 if (!buf)
1340 return NULL;
1341
1342 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1343 (struct create_durable_v2, dcontext));
1344 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
1345 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1346 (struct create_durable_v2, Name));
1347 buf->ccontext.NameLength = cpu_to_le16(4);
1348
1349 buf->dcontext.Timeout = 0; /* Should this be configurable by workload */
1350 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
fa70b87c 1351 generate_random_uuid(buf->dcontext.CreateGuid);
b56eae4d
SF		 1352 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
1353
1354 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1355 buf->Name[0] = 'D';
1356 buf->Name[1] = 'H';
1357 buf->Name[2] = '2';
1358 buf->Name[3] = 'Q';
1359 return buf;
1360}
1361
1362static struct create_durable_handle_reconnect_v2 *
1363create_reconnect_durable_v2_buf(struct cifs_fid *fid)
1364{
1365 struct create_durable_handle_reconnect_v2 *buf;
1366
1367 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
1368 GFP_KERNEL);
1369 if (!buf)
1370 return NULL;
1371
1372 buf->ccontext.DataOffset =
1373 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1374 dcontext));
1375 buf->ccontext.DataLength =
1376 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
1377 buf->ccontext.NameOffset =
1378 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1379 Name));
1380 buf->ccontext.NameLength = cpu_to_le16(4);
1381
1382 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
1383 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
1384 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1385 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
1386
1387 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1388 buf->Name[0] = 'D';
1389 buf->Name[1] = 'H';
1390 buf->Name[2] = '2';
1391 buf->Name[3] = 'C';
1392 return buf;
1393}
1394
63eb3def 1395static int
b56eae4d
SF		 1396add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
1397 struct cifs_open_parms *oparms)
1398{
1399 struct smb2_create_req *req = iov[0].iov_base;
1400 unsigned int num = *num_iovec;
1401
1402 iov[num].iov_base = create_durable_v2_buf(oparms->fid);
1403 if (iov[num].iov_base == NULL)
1404 return -ENOMEM;
1405 iov[num].iov_len = sizeof(struct create_durable_v2);
1406 if (!req->CreateContextsOffset)
1407 req->CreateContextsOffset =
1408 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1409 iov[1].iov_len);
1410 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
1411 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable_v2));
1412 *num_iovec = num + 1;
1413 return 0;
1414}
1415
1416static int
1417add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
9cbc0b73 1418 struct cifs_open_parms *oparms)
63eb3def
PS		 1419{
1420 struct smb2_create_req *req = iov[0].iov_base;
1421 unsigned int num = *num_iovec;
1422
b56eae4d
SF		 1423 /* indicate that we don't need to relock the file */
1424 oparms->reconnect = false;
1425
1426 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
1427 if (iov[num].iov_base == NULL)
1428 return -ENOMEM;
1429 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
1430 if (!req->CreateContextsOffset)
1431 req->CreateContextsOffset =
1432 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1433 iov[1].iov_len);
1434 le32_add_cpu(&req->CreateContextsLength,
1435 sizeof(struct create_durable_handle_reconnect_v2));
1436 inc_rfc1001_len(&req->hdr,
1437 sizeof(struct create_durable_handle_reconnect_v2));
1438 *num_iovec = num + 1;
1439 return 0;
1440}
1441
1442static int
1443add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1444 struct cifs_open_parms *oparms, bool use_persistent)
1445{
1446 struct smb2_create_req *req = iov[0].iov_base;
1447 unsigned int num = *num_iovec;
1448
1449 if (use_persistent) {
1450 if (oparms->reconnect)
1451 return add_durable_reconnect_v2_context(iov, num_iovec,
1452 oparms);
1453 else
1454 return add_durable_v2_context(iov, num_iovec, oparms);
1455 }
1456
9cbc0b73
PS		 1457 if (oparms->reconnect) {
1458 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1459 /* indicate that we don't need to relock the file */
1460 oparms->reconnect = false;
1461 } else
1462 iov[num].iov_base = create_durable_buf();
63eb3def
PS		 1463 if (iov[num].iov_base == NULL)
1464 return -ENOMEM;
1465 iov[num].iov_len = sizeof(struct create_durable);
1466 if (!req->CreateContextsOffset)
1467 req->CreateContextsOffset =
1468 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1469 iov[1].iov_len);
31f92e9a 1470 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
63eb3def
PS		 1471 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
1472 *num_iovec = num + 1;
1473 return 0;
1474}
1475
2503a0db 1476int
064f6047 1477SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
b42bf888
PS		 1478 __u8 *oplock, struct smb2_file_all_info *buf,
1479 struct smb2_err_rsp **err_buf)
2503a0db
PS		 1480{
1481 struct smb2_create_req *req;
1482 struct smb2_create_rsp *rsp;
1483 struct TCP_Server_Info *server;
064f6047 1484 struct cifs_tcon *tcon = oparms->tcon;
2503a0db 1485 struct cifs_ses *ses = tcon->ses;
63eb3def 1486 struct kvec iov[4];
da502f7d 1487 struct kvec rsp_iov;
2503a0db
PS		 1488 int resp_buftype;
1489 int uni_path_len;
b8c32dbb
PS		 1490 __le16 *copy_path = NULL;
1491 int copy_size;
2503a0db 1492 int rc = 0;
da502f7d 1493 unsigned int n_iov = 2;
ca81983f 1494 __u32 file_attributes = 0;
663a9621 1495 char *dhc_buf = NULL, *lc_buf = NULL;
2503a0db 1496
f96637be 1497 cifs_dbg(FYI, "create/open\n");
2503a0db
PS		 1498
1499 if (ses && (ses->server))
1500 server = ses->server;
1501 else
1502 return -EIO;
1503
1504 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
1505 if (rc)
1506 return rc;
1507
064f6047 1508 if (oparms->create_options & CREATE_OPTION_READONLY)
ca81983f 1509 file_attributes |= ATTR_READONLY;
db8b631d
SF		 1510 if (oparms->create_options & CREATE_OPTION_SPECIAL)
1511 file_attributes |= ATTR_SYSTEM;
ca81983f 1512
2503a0db 1513 req->ImpersonationLevel = IL_IMPERSONATION;
064f6047 1514 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
2503a0db
PS		 1515 /* File attributes ignored on open (used in create though) */
1516 req->FileAttributes = cpu_to_le32(file_attributes);
1517 req->ShareAccess = FILE_SHARE_ALL_LE;
064f6047
PS		 1518 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1519 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
2503a0db 1520 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
59aa3718
PS		 1521 /* do not count rfc1001 len field */
1522 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
2503a0db
PS		 1523
1524 iov[0].iov_base = (char *)req;
1525 /* 4 for rfc1002 length field */
1526 iov[0].iov_len = get_rfc1002_length(req) + 4;
1527
1528 /* MUST set path len (NameLength) to 0 opening root of share */
59aa3718
PS		 1529 req->NameLength = cpu_to_le16(uni_path_len - 2);
1530 /* -1 since last byte is buf[0] which is sent below (path) */
1531 iov[0].iov_len--;
1532 if (uni_path_len % 8 != 0) {
1533 copy_size = uni_path_len / 8 * 8;
1534 if (copy_size < uni_path_len)
1535 copy_size += 8;
1536
1537 copy_path = kzalloc(copy_size, GFP_KERNEL);
1538 if (!copy_path)
1539 return -ENOMEM;
1540 memcpy((char *)copy_path, (const char *)path,
1541 uni_path_len);
1542 uni_path_len = copy_size;
1543 path = copy_path;
2503a0db
PS		 1544 }
1545
59aa3718
PS		 1546 iov[1].iov_len = uni_path_len;
1547 iov[1].iov_base = path;
1548 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1549 inc_rfc1001_len(req, uni_path_len - 1);
1550
b8c32dbb
PS		 1551 if (!server->oplocks)
1552 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1553
a41a28bd 1554 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
b8c32dbb
PS		 1555 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1556 req->RequestedOplockLevel = *oplock;
1557 else {
da502f7d 1558 rc = add_lease_context(server, iov, &n_iov, oplock);
d22cbfec 1559 if (rc) {
b8c32dbb
PS		 1560 cifs_small_buf_release(req);
1561 kfree(copy_path);
d22cbfec 1562 return rc;
b8c32dbb 1563 }
da502f7d 1564 lc_buf = iov[n_iov-1].iov_base;
b8c32dbb
PS		 1565 }
1566
63eb3def
PS		 1567 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1568 /* need to set Next field of lease context if we request it */
a41a28bd 1569 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
63eb3def 1570 struct create_context *ccontext =
da502f7d 1571 (struct create_context *)iov[n_iov-1].iov_base;
1c46943f 1572 ccontext->Next =
a41a28bd 1573 cpu_to_le32(server->vals->create_lease_size);
63eb3def 1574 }
b56eae4d 1575
da502f7d 1576 rc = add_durable_context(iov, &n_iov, oparms,
b56eae4d 1577 tcon->use_persistent);
63eb3def
PS		 1578 if (rc) {
1579 cifs_small_buf_release(req);
1580 kfree(copy_path);
663a9621 1581 kfree(lc_buf);
63eb3def
PS		 1582 return rc;
1583 }
da502f7d 1584 dhc_buf = iov[n_iov-1].iov_base;
63eb3def
PS		 1585 }
1586
da502f7d
PS		 1587 rc = SendReceive2(xid, ses, iov, n_iov, &resp_buftype, 0, &rsp_iov);
1588 cifs_small_buf_release(req);
1589 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2503a0db
PS		 1590
1591 if (rc != 0) {
1592 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
b42bf888
PS		 1593 if (err_buf)
1594 *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
1595 GFP_KERNEL);
2503a0db
PS		 1596 goto creat_exit;
1597 }
1598
064f6047
PS		 1599 oparms->fid->persistent_fid = rsp->PersistentFileId;
1600 oparms->fid->volatile_fid = rsp->VolatileFileId;
f0df737e
PS		 1601
1602 if (buf) {
1603 memcpy(buf, &rsp->CreationTime, 32);
1604 buf->AllocationSize = rsp->AllocationSize;
1605 buf->EndOfFile = rsp->EndofFile;
1606 buf->Attributes = rsp->FileAttributes;
1607 buf->NumberOfLinks = cpu_to_le32(1);
1608 buf->DeletePending = 0;
1609 }
2e44b288 1610
b8c32dbb 1611 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
42873b0a 1612 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
b8c32dbb
PS		 1613 else
1614 *oplock = rsp->OplockLevel;
2503a0db 1615creat_exit:
b8c32dbb 1616 kfree(copy_path);
663a9621
PS		 1617 kfree(lc_buf);
1618 kfree(dhc_buf);
2503a0db
PS		 1619 free_rsp_buf(resp_buftype, rsp);
1620 return rc;
1621}
1622
4a72dafa
SF		 1623/*
1624 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1625 */
1626int
1627SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1628 u64 volatile_fid, u32 opcode, bool is_fsctl, char *in_data,
1629 u32 indatalen, char **out_data, u32 *plen /* returned data len */)
1630{
1631 struct smb2_ioctl_req *req;
1632 struct smb2_ioctl_rsp *rsp;
31473fc4 1633 struct smb2_sync_hdr *shdr;
4a72dafa 1634 struct TCP_Server_Info *server;
8e353106 1635 struct cifs_ses *ses;
4a72dafa 1636 struct kvec iov[2];
da502f7d 1637 struct kvec rsp_iov;
4a72dafa 1638 int resp_buftype;
da502f7d 1639 int n_iov;
4a72dafa
SF		 1640 int rc = 0;
1641
1642 cifs_dbg(FYI, "SMB2 IOCTL\n");
1643
3d1a3745
SF		 1644 if (out_data != NULL)
1645 *out_data = NULL;
1646
4a72dafa
SF		 1647 /* zero out returned data len, in case of error */
1648 if (plen)
1649 *plen = 0;
1650
8e353106
SF		 1651 if (tcon)
1652 ses = tcon->ses;
1653 else
1654 return -EIO;
1655
4a72dafa
SF		 1656 if (ses && (ses->server))
1657 server = ses->server;
1658 else
1659 return -EIO;
1660
1661 rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req);
1662 if (rc)
1663 return rc;
1664
1665 req->CtlCode = cpu_to_le32(opcode);
1666 req->PersistentFileId = persistent_fid;
1667 req->VolatileFileId = volatile_fid;
1668
1669 if (indatalen) {
1670 req->InputCount = cpu_to_le32(indatalen);
1671 /* do not set InputOffset if no input data */
1672 req->InputOffset =
1673 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4);
1674 iov[1].iov_base = in_data;
1675 iov[1].iov_len = indatalen;
da502f7d 1676 n_iov = 2;
4a72dafa 1677 } else
da502f7d 1678 n_iov = 1;
4a72dafa
SF		 1679
1680 req->OutputOffset = 0;
1681 req->OutputCount = 0; /* MBZ */
1682
1683 /*
1684 * Could increase MaxOutputResponse, but that would require more
1685 * than one credit. Windows typically sets this smaller, but for some
1686 * ioctls it may be useful to allow server to send more. No point
1687 * limiting what the server can send as long as fits in one credit
1688 */
1689 req->MaxOutputResponse = cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1690
1691 if (is_fsctl)
1692 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
1693 else
1694 req->Flags = 0;
1695
1696 iov[0].iov_base = (char *)req;
4a72dafa 1697
7ff8d45c
SF		 1698 /*
1699 * If no input data, the size of ioctl struct in
1700 * protocol spec still includes a 1 byte data buffer,
1701 * but if input data passed to ioctl, we do not
1702 * want to double count this, so we do not send
1703 * the dummy one byte of data in iovec[0] if sending
1704 * input data (in iovec[1]). We also must add 4 bytes
1705 * in first iovec to allow for rfc1002 length field.
1706 */
1707
1708 if (indatalen) {
1709 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1710 inc_rfc1001_len(req, indatalen - 1);
1711 } else
1712 iov[0].iov_len = get_rfc1002_length(req) + 4;
1713
4a72dafa 1714
da502f7d
PS		 1715 rc = SendReceive2(xid, ses, iov, n_iov, &resp_buftype, 0, &rsp_iov);
1716 cifs_small_buf_release(req);
1717 rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
4a72dafa 1718
9bf0c9cd 1719 if ((rc != 0) && (rc != -EINVAL)) {
8e353106 1720 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
4a72dafa 1721 goto ioctl_exit;
9bf0c9cd
SF		 1722 } else if (rc == -EINVAL) {
1723 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
1724 (opcode != FSCTL_SRV_COPYCHUNK)) {
8e353106 1725 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
9bf0c9cd
SF		 1726 goto ioctl_exit;
1727 }
4a72dafa
SF		 1728 }
1729
1730 /* check if caller wants to look at return data or just return rc */
1731 if ((plen == NULL) || (out_data == NULL))
1732 goto ioctl_exit;
1733
1734 *plen = le32_to_cpu(rsp->OutputCount);
1735
1736 /* We check for obvious errors in the output buffer length and offset */
1737 if (*plen == 0)
1738 goto ioctl_exit; /* server returned no data */
1739 else if (*plen > 0xFF00) {
1740 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
1741 *plen = 0;
1742 rc = -EIO;
1743 goto ioctl_exit;
1744 }
1745
1746 if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
1747 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
1748 le32_to_cpu(rsp->OutputOffset));
1749 *plen = 0;
1750 rc = -EIO;
1751 goto ioctl_exit;
1752 }
1753
1754 *out_data = kmalloc(*plen, GFP_KERNEL);
1755 if (*out_data == NULL) {
1756 rc = -ENOMEM;
1757 goto ioctl_exit;
1758 }
1759
31473fc4
PS		 1760 shdr = get_sync_hdr(rsp);
1761 memcpy(*out_data, (char *)shdr + le32_to_cpu(rsp->OutputOffset), *plen);
4a72dafa
SF		 1762ioctl_exit:
1763 free_rsp_buf(resp_buftype, rsp);
1764 return rc;
1765}
1766
64a5cfa6
SF		 1767/*
1768 * Individual callers to ioctl worker function follow
1769 */
1770
1771int
1772SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1773 u64 persistent_fid, u64 volatile_fid)
1774{
1775 int rc;
64a5cfa6
SF		 1776 struct compress_ioctl fsctl_input;
1777 char *ret_data = NULL;
1778
1779 fsctl_input.CompressionState =
bc09d141 1780 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
64a5cfa6
SF		 1781
1782 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1783 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
1784 (char *)&fsctl_input /* data input */,
1785 2 /* in data len */, &ret_data /* out data */, NULL);
1786
1787 cifs_dbg(FYI, "set compression rc %d\n", rc);
64a5cfa6
SF		 1788
1789 return rc;
1790}
1791
2503a0db
PS		 1792int
1793SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1794 u64 persistent_fid, u64 volatile_fid)
1795{
1796 struct smb2_close_req *req;
1797 struct smb2_close_rsp *rsp;
1798 struct TCP_Server_Info *server;
1799 struct cifs_ses *ses = tcon->ses;
1800 struct kvec iov[1];
da502f7d 1801 struct kvec rsp_iov;
2503a0db
PS		 1802 int resp_buftype;
1803 int rc = 0;
1804
f96637be 1805 cifs_dbg(FYI, "Close\n");
2503a0db
PS		 1806
1807 if (ses && (ses->server))
1808 server = ses->server;
1809 else
1810 return -EIO;
1811
1812 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1813 if (rc)
1814 return rc;
1815
1816 req->PersistentFileId = persistent_fid;
1817 req->VolatileFileId = volatile_fid;
1818
1819 iov[0].iov_base = (char *)req;
1820 /* 4 for rfc1002 length field */
1821 iov[0].iov_len = get_rfc1002_length(req) + 4;
1822
da502f7d
PS		 1823 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0, &rsp_iov);
1824 cifs_small_buf_release(req);
1825 rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
2503a0db
PS		 1826
1827 if (rc != 0) {
d4a029d2 1828 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
2503a0db
PS		 1829 goto close_exit;
1830 }
1831
2503a0db
PS		 1832 /* BB FIXME - decode close response, update inode for caching */
1833
1834close_exit:
1835 free_rsp_buf(resp_buftype, rsp);
1836 return rc;
1837}
be4cb9e3
PS		 1838
1839static int
1840validate_buf(unsigned int offset, unsigned int buffer_length,
1841 struct smb2_hdr *hdr, unsigned int min_buf_size)
1842
1843{
1844 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
1845 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
1846 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1847 char *end_of_buf = begin_of_buf + buffer_length;
1848
1849
1850 if (buffer_length < min_buf_size) {
f96637be
JP		 1851 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
1852 buffer_length, min_buf_size);
be4cb9e3
PS		 1853 return -EINVAL;
1854 }
1855
1856 /* check if beyond RFC1001 maximum length */
1857 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
f96637be
JP		 1858 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
1859 buffer_length, smb_len);
be4cb9e3
PS		 1860 return -EINVAL;
1861 }
1862
1863 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
f96637be 1864 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
be4cb9e3
PS		 1865 return -EINVAL;
1866 }
1867
1868 return 0;
1869}
1870
1871/*
1872 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1873 * Caller must free buffer.
1874 */
1875static int
1876validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
1877 struct smb2_hdr *hdr, unsigned int minbufsize,
1878 char *data)
1879
1880{
1881 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1882 int rc;
1883
1884 if (!data)
1885 return -EINVAL;
1886
1887 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
1888 if (rc)
1889 return rc;
1890
1891 memcpy(data, begin_of_buf, buffer_length);
1892
1893 return 0;
1894}
1895
f0df737e
PS		 1896static int
1897query_info(const unsigned int xid, struct cifs_tcon *tcon,
1898 u64 persistent_fid, u64 volatile_fid, u8 info_class,
1899 size_t output_len, size_t min_len, void *data)
be4cb9e3
PS		 1900{
1901 struct smb2_query_info_req *req;
1902 struct smb2_query_info_rsp *rsp = NULL;
1903 struct kvec iov[2];
da502f7d 1904 struct kvec rsp_iov;
be4cb9e3
PS		 1905 int rc = 0;
1906 int resp_buftype;
1907 struct TCP_Server_Info *server;
1908 struct cifs_ses *ses = tcon->ses;
1909
f96637be 1910 cifs_dbg(FYI, "Query Info\n");
be4cb9e3
PS		 1911
1912 if (ses && (ses->server))
1913 server = ses->server;
1914 else
1915 return -EIO;
1916
1917 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
1918 if (rc)
1919 return rc;
1920
1921 req->InfoType = SMB2_O_INFO_FILE;
f0df737e 1922 req->FileInfoClass = info_class;
be4cb9e3
PS		 1923 req->PersistentFileId = persistent_fid;
1924 req->VolatileFileId = volatile_fid;
1925 /* 4 for rfc1002 length field and 1 for Buffer */
1926 req->InputBufferOffset =
1927 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
f0df737e 1928 req->OutputBufferLength = cpu_to_le32(output_len);
be4cb9e3
PS		 1929
1930 iov[0].iov_base = (char *)req;
1931 /* 4 for rfc1002 length field */
1932 iov[0].iov_len = get_rfc1002_length(req) + 4;
1933
da502f7d
PS		 1934 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0, &rsp_iov);
1935 cifs_small_buf_release(req);
1936 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
e5d04887 1937
be4cb9e3
PS		 1938 if (rc) {
1939 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
1940 goto qinf_exit;
1941 }
1942
be4cb9e3
PS		 1943 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
1944 le32_to_cpu(rsp->OutputBufferLength),
f0df737e 1945 &rsp->hdr, min_len, data);
be4cb9e3
PS		 1946
1947qinf_exit:
1948 free_rsp_buf(resp_buftype, rsp);
1949 return rc;
1950}
9094fad1 1951
f0df737e
PS		 1952int
1953SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
1954 u64 persistent_fid, u64 volatile_fid,
1955 struct smb2_file_all_info *data)
1956{
1957 return query_info(xid, tcon, persistent_fid, volatile_fid,
1958 FILE_ALL_INFORMATION,
1bbe4997 1959 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
f0df737e
PS		 1960 sizeof(struct smb2_file_all_info), data);
1961}
1962
1963int
1964SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
1965 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
1966{
1967 return query_info(xid, tcon, persistent_fid, volatile_fid,
1968 FILE_INTERNAL_INFORMATION,
1969 sizeof(struct smb2_file_internal_info),
1970 sizeof(struct smb2_file_internal_info), uniqueid);
1971}
1972
9094fad1
PS		 1973/*
1974 * This is a no-op for now. We're not really interested in the reply, but
1975 * rather in the fact that the server sent one and that server->lstrp
1976 * gets updated.
1977 *
1978 * FIXME: maybe we should consider checking that the reply matches request?
1979 */
1980static void
1981smb2_echo_callback(struct mid_q_entry *mid)
1982{
1983 struct TCP_Server_Info *server = mid->callback_data;
31473fc4 1984 struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
9094fad1
PS		 1985 unsigned int credits_received = 1;
1986
1987 if (mid->mid_state == MID_RESPONSE_RECEIVED)
31473fc4 1988 credits_received = le16_to_cpu(rsp->hdr.sync_hdr.CreditRequest);
9094fad1 1989
5fb4e288 1990 mutex_lock(&server->srv_mutex);
9094fad1 1991 DeleteMidQEntry(mid);
5fb4e288 1992 mutex_unlock(&server->srv_mutex);
9094fad1
PS		 1993 add_credits(server, credits_received, CIFS_ECHO_OP);
1994}
1995
53e0e11e
PS		 1996void smb2_reconnect_server(struct work_struct *work)
1997{
1998 struct TCP_Server_Info *server = container_of(work,
1999 struct TCP_Server_Info, reconnect.work);
2000 struct cifs_ses *ses;
2001 struct cifs_tcon *tcon, *tcon2;
2002 struct list_head tmp_list;
2003 int tcon_exist = false;
2004
2005 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2006 mutex_lock(&server->reconnect_mutex);
2007
2008 INIT_LIST_HEAD(&tmp_list);
2009 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
2010
2011 spin_lock(&cifs_tcp_ses_lock);
2012 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2013 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
96a988ff 2014 if (tcon->need_reconnect || tcon->need_reopen_files) {
53e0e11e
PS		 2015 tcon->tc_count++;
2016 list_add_tail(&tcon->rlist, &tmp_list);
2017 tcon_exist = true;
2018 }
2019 }
2020 }
2021 /*
2022 * Get the reference to server struct to be sure that the last call of
2023 * cifs_put_tcon() in the loop below won't release the server pointer.
2024 */
2025 if (tcon_exist)
2026 server->srv_count++;
2027
2028 spin_unlock(&cifs_tcp_ses_lock);
2029
2030 list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
96a988ff
PS		 2031 if (!smb2_reconnect(SMB2_INTERNAL_CMD, tcon))
2032 cifs_reopen_persistent_handles(tcon);
53e0e11e
PS		 2033 list_del_init(&tcon->rlist);
2034 cifs_put_tcon(tcon);
2035 }
2036
2037 cifs_dbg(FYI, "Reconnecting tcons finished\n");
2038 mutex_unlock(&server->reconnect_mutex);
2039
2040 /* now we can safely release srv struct */
2041 if (tcon_exist)
2042 cifs_put_tcp_session(server, 1);
2043}
2044
9094fad1
PS		 2045int
2046SMB2_echo(struct TCP_Server_Info *server)
2047{
2048 struct smb2_echo_req *req;
2049 int rc = 0;
738f9de5
PS		 2050 struct kvec iov[2];
2051 struct smb_rqst rqst = { .rq_iov = iov,
2052 .rq_nvec = 2 };
9094fad1 2053
f96637be 2054 cifs_dbg(FYI, "In echo request\n");
9094fad1 2055
4fcd1813 2056 if (server->tcpStatus == CifsNeedNegotiate) {
53e0e11e
PS		 2057 /* No need to send echo on newly established connections */
2058 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
2059 return rc;
4fcd1813
SF		 2060 }
2061
9094fad1
PS		 2062 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
2063 if (rc)
2064 return rc;
2065
31473fc4 2066 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
9094fad1 2067
9094fad1 2068 /* 4 for rfc1002 length field */
738f9de5
PS		 2069 iov[0].iov_len = 4;
2070 iov[0].iov_base = (char *)req;
2071 iov[1].iov_len = get_rfc1002_length(req);
2072 iov[1].iov_base = (char *)req + 4;
9094fad1 2073
fec344e3 2074 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server,
9094fad1
PS		 2075 CIFS_ECHO_OP);
2076 if (rc)
f96637be 2077 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
9094fad1
PS		 2078
2079 cifs_small_buf_release(req);
2080 return rc;
2081}
7a5cfb19
PS		 2082
2083int
2084SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2085 u64 volatile_fid)
2086{
2087 struct smb2_flush_req *req;
2088 struct TCP_Server_Info *server;
2089 struct cifs_ses *ses = tcon->ses;
2090 struct kvec iov[1];
da502f7d 2091 struct kvec rsp_iov;
7a5cfb19
PS		 2092 int resp_buftype;
2093 int rc = 0;
2094
f96637be 2095 cifs_dbg(FYI, "Flush\n");
7a5cfb19
PS		 2096
2097 if (ses && (ses->server))
2098 server = ses->server;
2099 else
2100 return -EIO;
2101
2102 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
2103 if (rc)
2104 return rc;
2105
2106 req->PersistentFileId = persistent_fid;
2107 req->VolatileFileId = volatile_fid;
2108
2109 iov[0].iov_base = (char *)req;
2110 /* 4 for rfc1002 length field */
2111 iov[0].iov_len = get_rfc1002_length(req) + 4;
2112
da502f7d
PS		 2113 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0, &rsp_iov);
2114 cifs_small_buf_release(req);
7a5cfb19 2115
dfebe400 2116 if (rc != 0)
7a5cfb19
PS		 2117 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
2118
da502f7d 2119 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
7a5cfb19
PS		 2120 return rc;
2121}
09a4707e
PS		 2122
2123/*
2124 * To form a chain of read requests, any read requests after the first should
2125 * have the end_of_chain boolean set to true.
2126 */
2127static int
738f9de5
PS		 2128smb2_new_read_req(void **buf, unsigned int *total_len,
2129 struct cifs_io_parms *io_parms, unsigned int remaining_bytes,
2130 int request_type)
09a4707e
PS		 2131{
2132 int rc = -EACCES;
2133 struct smb2_read_req *req = NULL;
31473fc4 2134 struct smb2_sync_hdr *shdr;
09a4707e
PS		 2135
2136 rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req);
2137 if (rc)
2138 return rc;
2139 if (io_parms->tcon->ses->server == NULL)
2140 return -ECONNABORTED;
2141
31473fc4
PS		 2142 shdr = get_sync_hdr(req);
2143 shdr->ProcessId = cpu_to_le32(io_parms->pid);
09a4707e
PS		 2144
2145 req->PersistentFileId = io_parms->persistent_fid;
2146 req->VolatileFileId = io_parms->volatile_fid;
2147 req->ReadChannelInfoOffset = 0; /* reserved */
2148 req->ReadChannelInfoLength = 0; /* reserved */
2149 req->Channel = 0; /* reserved */
2150 req->MinimumCount = 0;
2151 req->Length = cpu_to_le32(io_parms->length);
2152 req->Offset = cpu_to_le64(io_parms->offset);
2153
2154 if (request_type & CHAINED_REQUEST) {
2155 if (!(request_type & END_OF_CHAIN)) {
2156 /* 4 for rfc1002 length field */
31473fc4 2157 shdr->NextCommand =
09a4707e
PS		 2158 cpu_to_le32(get_rfc1002_length(req) + 4);
2159 } else /* END_OF_CHAIN */
31473fc4 2160 shdr->NextCommand = 0;
09a4707e 2161 if (request_type & RELATED_REQUEST) {
31473fc4 2162 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
09a4707e
PS		 2163 /*
2164 * Related requests use info from previous read request
2165 * in chain.
2166 */
31473fc4
PS		 2167 shdr->SessionId = 0xFFFFFFFF;
2168 shdr->TreeId = 0xFFFFFFFF;
09a4707e
PS		 2169 req->PersistentFileId = 0xFFFFFFFF;
2170 req->VolatileFileId = 0xFFFFFFFF;
2171 }
2172 }
2173 if (remaining_bytes > io_parms->length)
2174 req->RemainingBytes = cpu_to_le32(remaining_bytes);
2175 else
2176 req->RemainingBytes = 0;
2177
738f9de5 2178 *buf = req;
09a4707e 2179 /* 4 for rfc1002 length field */
738f9de5 2180 *total_len = get_rfc1002_length(req) + 4;
09a4707e
PS		 2181 return rc;
2182}
2183
2184static void
2185smb2_readv_callback(struct mid_q_entry *mid)
2186{
2187 struct cifs_readdata *rdata = mid->callback_data;
2188 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
2189 struct TCP_Server_Info *server = tcon->ses->server;
738f9de5
PS		 2190 struct smb2_sync_hdr *shdr =
2191 (struct smb2_sync_hdr *)rdata->iov[1].iov_base;
09a4707e 2192 unsigned int credits_received = 1;
738f9de5
PS		 2193 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2194 .rq_nvec = 2,
8321fec4
JL		 2195 .rq_pages = rdata->pages,
2196 .rq_npages = rdata->nr_pages,
2197 .rq_pagesz = rdata->pagesz,
2198 .rq_tailsz = rdata->tailsz };
09a4707e 2199
f96637be
JP		 2200 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2201 __func__, mid->mid, mid->mid_state, rdata->result,
2202 rdata->bytes);
09a4707e
PS		 2203
2204 switch (mid->mid_state) {
2205 case MID_RESPONSE_RECEIVED:
31473fc4 2206 credits_received = le16_to_cpu(shdr->CreditRequest);
09a4707e 2207 /* result already set, check signature */
38d77c50 2208 if (server->sign) {
3c1bf7e4
PS		 2209 int rc;
2210
0b688cfc 2211 rc = smb2_verify_signature(&rqst, server);
3c1bf7e4 2212 if (rc)
f96637be
JP		 2213 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
2214 rc);
3c1bf7e4 2215 }
09a4707e 2216 /* FIXME: should this be counted toward the initiating task? */
34a54d61
PS		 2217 task_io_account_read(rdata->got_bytes);
2218 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 2219 break;
2220 case MID_REQUEST_SUBMITTED:
2221 case MID_RETRY_NEEDED:
2222 rdata->result = -EAGAIN;
d913ed17
PS		 2223 if (server->sign && rdata->got_bytes)
2224 /* reset bytes number since we can not check a sign */
2225 rdata->got_bytes = 0;
2226 /* FIXME: should this be counted toward the initiating task? */
2227 task_io_account_read(rdata->got_bytes);
2228 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 2229 break;
2230 default:
2231 if (rdata->result != -ENODATA)
2232 rdata->result = -EIO;
2233 }
2234
2235 if (rdata->result)
2236 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
2237
2238 queue_work(cifsiod_wq, &rdata->work);
5fb4e288 2239 mutex_lock(&server->srv_mutex);
09a4707e 2240 DeleteMidQEntry(mid);
5fb4e288 2241 mutex_unlock(&server->srv_mutex);
09a4707e
PS		 2242 add_credits(server, credits_received, 0);
2243}
2244
738f9de5 2245/* smb2_async_readv - send an async read, and set up mid to handle result */
09a4707e
PS		 2246int
2247smb2_async_readv(struct cifs_readdata *rdata)
2248{
bed9da02 2249 int rc, flags = 0;
31473fc4
PS		 2250 char *buf;
2251 struct smb2_sync_hdr *shdr;
09a4707e 2252 struct cifs_io_parms io_parms;
738f9de5
PS		 2253 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2254 .rq_nvec = 2 };
bed9da02 2255 struct TCP_Server_Info *server;
738f9de5 2256 unsigned int total_len;
09a4707e 2257
f96637be
JP		 2258 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
2259 __func__, rdata->offset, rdata->bytes);
09a4707e
PS		 2260
2261 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
2262 io_parms.offset = rdata->offset;
2263 io_parms.length = rdata->bytes;
2264 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
2265 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
2266 io_parms.pid = rdata->pid;
bed9da02
PS		 2267
2268 server = io_parms.tcon->ses->server;
2269
738f9de5 2270 rc = smb2_new_read_req((void **) &buf, &total_len, &io_parms, 0, 0);
bed9da02
PS		 2271 if (rc) {
2272 if (rc == -EAGAIN && rdata->credits) {
2273 /* credits was reset by reconnect */
2274 rdata->credits = 0;
2275 /* reduce in_flight value since we won't send the req */
2276 spin_lock(&server->req_lock);
2277 server->in_flight--;
2278 spin_unlock(&server->req_lock);
2279 }
09a4707e 2280 return rc;
bed9da02 2281 }
09a4707e 2282
31473fc4 2283 shdr = get_sync_hdr(buf);
09a4707e 2284 /* 4 for rfc1002 length field */
738f9de5
PS		 2285 rdata->iov[0].iov_len = 4;
2286 rdata->iov[0].iov_base = buf;
2287 rdata->iov[1].iov_len = total_len - 4;
2288 rdata->iov[1].iov_base = buf + 4;
09a4707e 2289
bed9da02 2290 if (rdata->credits) {
31473fc4 2291 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
bed9da02 2292 SMB2_MAX_BUFFER_SIZE));
31473fc4 2293 shdr->CreditRequest = shdr->CreditCharge;
bed9da02
PS		 2294 spin_lock(&server->req_lock);
2295 server->credits += rdata->credits -
31473fc4 2296 le16_to_cpu(shdr->CreditCharge);
bed9da02
PS		 2297 spin_unlock(&server->req_lock);
2298 wake_up(&server->request_q);
2299 flags = CIFS_HAS_CREDITS;
2300 }
2301
09a4707e 2302 kref_get(&rdata->refcount);
fec344e3 2303 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
09a4707e 2304 cifs_readv_receive, smb2_readv_callback,
bed9da02 2305 rdata, flags);
e5d04887 2306 if (rc) {
09a4707e 2307 kref_put(&rdata->refcount, cifs_readdata_release);
e5d04887
PS		 2308 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
2309 }
09a4707e
PS		 2310
2311 cifs_small_buf_release(buf);
2312 return rc;
2313}
33319141 2314
d8e05039
PS		 2315int
2316SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
2317 unsigned int *nbytes, char **buf, int *buf_type)
2318{
2319 int resp_buftype, rc = -EACCES;
2320 struct smb2_read_rsp *rsp = NULL;
31473fc4 2321 struct smb2_sync_hdr *shdr;
d8e05039 2322 struct kvec iov[1];
da502f7d 2323 struct kvec rsp_iov;
738f9de5
PS		 2324 unsigned int total_len;
2325 char *req;
d8e05039
PS		 2326
2327 *nbytes = 0;
738f9de5 2328 rc = smb2_new_read_req((void **)&req, &total_len, io_parms, 0, 0);
d8e05039
PS		 2329 if (rc)
2330 return rc;
2331
738f9de5
PS		 2332 iov[0].iov_base = buf;
2333 iov[0].iov_len = total_len;
2334
d8e05039 2335 rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1,
da502f7d
PS		 2336 &resp_buftype, CIFS_LOG_ERROR, &rsp_iov);
2337 cifs_small_buf_release(iov[0].iov_base);
d8e05039 2338
da502f7d 2339 rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
31473fc4 2340 shdr = get_sync_hdr(rsp);
d8e05039 2341
31473fc4 2342 if (shdr->Status == STATUS_END_OF_FILE) {
da502f7d 2343 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
d8e05039
PS		 2344 return 0;
2345 }
2346
2347 if (rc) {
2348 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
f96637be 2349 cifs_dbg(VFS, "Send error in read = %d\n", rc);
d8e05039
PS		 2350 } else {
2351 *nbytes = le32_to_cpu(rsp->DataLength);
2352 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
2353 (*nbytes > io_parms->length)) {
f96637be
JP		 2354 cifs_dbg(FYI, "bad length %d for count %d\n",
2355 *nbytes, io_parms->length);
d8e05039
PS		 2356 rc = -EIO;
2357 *nbytes = 0;
2358 }
2359 }
2360
2361 if (*buf) {
31473fc4 2362 memcpy(*buf, (char *)shdr + rsp->DataOffset, *nbytes);
da502f7d 2363 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
d8e05039 2364 } else if (resp_buftype != CIFS_NO_BUFFER) {
da502f7d 2365 *buf = rsp_iov.iov_base;
d8e05039
PS		 2366 if (resp_buftype == CIFS_SMALL_BUFFER)
2367 *buf_type = CIFS_SMALL_BUFFER;
2368 else if (resp_buftype == CIFS_LARGE_BUFFER)
2369 *buf_type = CIFS_LARGE_BUFFER;
2370 }
2371 return rc;
2372}
2373
33319141
PS		 2374/*
2375 * Check the mid_state and signature on received buffer (if any), and queue the
2376 * workqueue completion task.
2377 */
2378static void
2379smb2_writev_callback(struct mid_q_entry *mid)
2380{
2381 struct cifs_writedata *wdata = mid->callback_data;
2382 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
5fb4e288 2383 struct TCP_Server_Info *server = tcon->ses->server;
33319141
PS		 2384 unsigned int written;
2385 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
2386 unsigned int credits_received = 1;
2387
2388 switch (mid->mid_state) {
2389 case MID_RESPONSE_RECEIVED:
31473fc4 2390 credits_received = le16_to_cpu(rsp->hdr.sync_hdr.CreditRequest);
33319141
PS		 2391 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
2392 if (wdata->result != 0)
2393 break;
2394
2395 written = le32_to_cpu(rsp->DataLength);
2396 /*
2397 * Mask off high 16 bits when bytes written as returned
2398 * by the server is greater than bytes requested by the
2399 * client. OS/2 servers are known to set incorrect
2400 * CountHigh values.
2401 */
2402 if (written > wdata->bytes)
2403 written &= 0xFFFF;
2404
2405 if (written < wdata->bytes)
2406 wdata->result = -ENOSPC;
2407 else
2408 wdata->bytes = written;
2409 break;
2410 case MID_REQUEST_SUBMITTED:
2411 case MID_RETRY_NEEDED:
2412 wdata->result = -EAGAIN;
2413 break;
2414 default:
2415 wdata->result = -EIO;
2416 break;
2417 }
2418
2419 if (wdata->result)
2420 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2421
2422 queue_work(cifsiod_wq, &wdata->work);
5fb4e288 2423 mutex_lock(&server->srv_mutex);
33319141 2424 DeleteMidQEntry(mid);
5fb4e288 2425 mutex_unlock(&server->srv_mutex);
33319141
PS		 2426 add_credits(tcon->ses->server, credits_received, 0);
2427}
2428
2429/* smb2_async_writev - send an async write, and set up mid to handle result */
2430int
4a5c80d7
SF		 2431smb2_async_writev(struct cifs_writedata *wdata,
2432 void (*release)(struct kref *kref))
33319141 2433{
cb7e9eab 2434 int rc = -EACCES, flags = 0;
33319141 2435 struct smb2_write_req *req = NULL;
31473fc4 2436 struct smb2_sync_hdr *shdr;
33319141 2437 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
cb7e9eab 2438 struct TCP_Server_Info *server = tcon->ses->server;
738f9de5
PS		 2439 struct kvec iov[2];
2440 struct smb_rqst rqst = { };
33319141
PS		 2441
2442 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
cb7e9eab
PS		 2443 if (rc) {
2444 if (rc == -EAGAIN && wdata->credits) {
2445 /* credits was reset by reconnect */
2446 wdata->credits = 0;
2447 /* reduce in_flight value since we won't send the req */
2448 spin_lock(&server->req_lock);
2449 server->in_flight--;
2450 spin_unlock(&server->req_lock);
2451 }
33319141 2452 goto async_writev_out;
cb7e9eab 2453 }
33319141 2454
31473fc4
PS		 2455 shdr = get_sync_hdr(req);
2456 shdr->ProcessId = cpu_to_le32(wdata->cfile->pid);
33319141
PS		 2457
2458 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
2459 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
2460 req->WriteChannelInfoOffset = 0;
2461 req->WriteChannelInfoLength = 0;
2462 req->Channel = 0;
2463 req->Offset = cpu_to_le64(wdata->offset);
2464 /* 4 for rfc1002 length field */
2465 req->DataOffset = cpu_to_le16(
2466 offsetof(struct smb2_write_req, Buffer) - 4);
2467 req->RemainingBytes = 0;
2468
2469 /* 4 for rfc1002 length field and 1 for Buffer */
738f9de5
PS		 2470 iov[0].iov_len = 4;
2471 iov[0].iov_base = req;
2472 iov[1].iov_len = get_rfc1002_length(req) - 1;
2473 iov[1].iov_base = (char *)req + 4;
33319141 2474
738f9de5
PS		 2475 rqst.rq_iov = iov;
2476 rqst.rq_nvec = 2;
eddb079d
JL		 2477 rqst.rq_pages = wdata->pages;
2478 rqst.rq_npages = wdata->nr_pages;
2479 rqst.rq_pagesz = wdata->pagesz;
2480 rqst.rq_tailsz = wdata->tailsz;
33319141 2481
f96637be
JP		 2482 cifs_dbg(FYI, "async write at %llu %u bytes\n",
2483 wdata->offset, wdata->bytes);
33319141
PS		 2484
2485 req->Length = cpu_to_le32(wdata->bytes);
2486
2487 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
2488
cb7e9eab 2489 if (wdata->credits) {
31473fc4 2490 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
cb7e9eab 2491 SMB2_MAX_BUFFER_SIZE));
31473fc4 2492 shdr->CreditRequest = shdr->CreditCharge;
cb7e9eab
PS		 2493 spin_lock(&server->req_lock);
2494 server->credits += wdata->credits -
31473fc4 2495 le16_to_cpu(shdr->CreditCharge);
cb7e9eab
PS		 2496 spin_unlock(&server->req_lock);
2497 wake_up(&server->request_q);
2498 flags = CIFS_HAS_CREDITS;
2499 }
2500
33319141 2501 kref_get(&wdata->refcount);
cb7e9eab
PS		 2502 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, wdata,
2503 flags);
33319141 2504
e5d04887 2505 if (rc) {
4a5c80d7 2506 kref_put(&wdata->refcount, release);
e5d04887
PS		 2507 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2508 }
33319141 2509
33319141
PS		 2510async_writev_out:
2511 cifs_small_buf_release(req);
33319141
PS		 2512 return rc;
2513}
009d3443
PS		 2514
2515/*
2516 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2517 * The length field from io_parms must be at least 1 and indicates a number of
2518 * elements with data to write that begins with position 1 in iov array. All
2519 * data length is specified by count.
2520 */
2521int
2522SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
2523 unsigned int *nbytes, struct kvec *iov, int n_vec)
2524{
2525 int rc = 0;
2526 struct smb2_write_req *req = NULL;
2527 struct smb2_write_rsp *rsp = NULL;
2528 int resp_buftype;
da502f7d
PS		 2529 struct kvec rsp_iov;
2530
009d3443
PS		 2531 *nbytes = 0;
2532
2533 if (n_vec < 1)
2534 return rc;
2535
2536 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
2537 if (rc)
2538 return rc;
2539
2540 if (io_parms->tcon->ses->server == NULL)
2541 return -ECONNABORTED;
2542
31473fc4 2543 req->hdr.sync_hdr.ProcessId = cpu_to_le32(io_parms->pid);
009d3443
PS		 2544
2545 req->PersistentFileId = io_parms->persistent_fid;
2546 req->VolatileFileId = io_parms->volatile_fid;
2547 req->WriteChannelInfoOffset = 0;
2548 req->WriteChannelInfoLength = 0;
2549 req->Channel = 0;
2550 req->Length = cpu_to_le32(io_parms->length);
2551 req->Offset = cpu_to_le64(io_parms->offset);
2552 /* 4 for rfc1002 length field */
2553 req->DataOffset = cpu_to_le16(
2554 offsetof(struct smb2_write_req, Buffer) - 4);
2555 req->RemainingBytes = 0;
2556
2557 iov[0].iov_base = (char *)req;
2558 /* 4 for rfc1002 length field and 1 for Buffer */
2559 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2560
2561 /* length of entire message including data to be written */
2562 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
2563
2564 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
da502f7d
PS		 2565 &resp_buftype, 0, &rsp_iov);
2566 cifs_small_buf_release(req);
2567 rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
009d3443
PS		 2568
2569 if (rc) {
2570 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
f96637be 2571 cifs_dbg(VFS, "Send error in write = %d\n", rc);
e5d04887 2572 } else
009d3443 2573 *nbytes = le32_to_cpu(rsp->DataLength);
e5d04887
PS		 2574
2575 free_rsp_buf(resp_buftype, rsp);
009d3443
PS		 2576 return rc;
2577}
35143eb5 2578
d324f08d
PS		 2579static unsigned int
2580num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
2581{
2582 int len;
2583 unsigned int entrycount = 0;
2584 unsigned int next_offset = 0;
2585 FILE_DIRECTORY_INFO *entryptr;
2586
2587 if (bufstart == NULL)
2588 return 0;
2589
2590 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
2591
2592 while (1) {
2593 entryptr = (FILE_DIRECTORY_INFO *)
2594 ((char *)entryptr + next_offset);
2595
2596 if ((char *)entryptr + size > end_of_buf) {
f96637be 2597 cifs_dbg(VFS, "malformed search entry would overflow\n");
d324f08d
PS		 2598 break;
2599 }
2600
2601 len = le32_to_cpu(entryptr->FileNameLength);
2602 if ((char *)entryptr + len + size > end_of_buf) {
f96637be
JP		 2603 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
2604 end_of_buf);
d324f08d
PS		 2605 break;
2606 }
2607
2608 *lastentry = (char *)entryptr;
2609 entrycount++;
2610
2611 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
2612 if (!next_offset)
2613 break;
2614 }
2615
2616 return entrycount;
2617}
2618
2619/*
2620 * Readdir/FindFirst
2621 */
2622int
2623SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
2624 u64 persistent_fid, u64 volatile_fid, int index,
2625 struct cifs_search_info *srch_inf)
2626{
2627 struct smb2_query_directory_req *req;
2628 struct smb2_query_directory_rsp *rsp = NULL;
2629 struct kvec iov[2];
da502f7d 2630 struct kvec rsp_iov;
d324f08d
PS		 2631 int rc = 0;
2632 int len;
75fdfc84 2633 int resp_buftype = CIFS_NO_BUFFER;
d324f08d
PS		 2634 unsigned char *bufptr;
2635 struct TCP_Server_Info *server;
2636 struct cifs_ses *ses = tcon->ses;
2637 __le16 asteriks = cpu_to_le16('*');
2638 char *end_of_smb;
2639 unsigned int output_size = CIFSMaxBufSize;
2640 size_t info_buf_size;
2641
2642 if (ses && (ses->server))
2643 server = ses->server;
2644 else
2645 return -EIO;
2646
2647 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
2648 if (rc)
2649 return rc;
2650
2651 switch (srch_inf->info_level) {
2652 case SMB_FIND_FILE_DIRECTORY_INFO:
2653 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
2654 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
2655 break;
2656 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
2657 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
2658 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
2659 break;
2660 default:
f96637be
JP		 2661 cifs_dbg(VFS, "info level %u isn't supported\n",
2662 srch_inf->info_level);
d324f08d
PS		 2663 rc = -EINVAL;
2664 goto qdir_exit;
2665 }
2666
2667 req->FileIndex = cpu_to_le32(index);
2668 req->PersistentFileId = persistent_fid;
2669 req->VolatileFileId = volatile_fid;
2670
2671 len = 0x2;
2672 bufptr = req->Buffer;
2673 memcpy(bufptr, &asteriks, len);
2674
2675 req->FileNameOffset =
2676 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
2677 req->FileNameLength = cpu_to_le16(len);
2678 /*
2679 * BB could be 30 bytes or so longer if we used SMB2 specific
2680 * buffer lengths, but this is safe and close enough.
2681 */
2682 output_size = min_t(unsigned int, output_size, server->maxBuf);
2683 output_size = min_t(unsigned int, output_size, 2 << 15);
2684 req->OutputBufferLength = cpu_to_le32(output_size);
2685
2686 iov[0].iov_base = (char *)req;
2687 /* 4 for RFC1001 length and 1 for Buffer */
2688 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2689
2690 iov[1].iov_base = (char *)(req->Buffer);
2691 iov[1].iov_len = len;
2692
2693 inc_rfc1001_len(req, len - 1 /* Buffer */);
2694
da502f7d
PS		 2695 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0, &rsp_iov);
2696 cifs_small_buf_release(req);
2697 rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
e5d04887 2698
d324f08d 2699 if (rc) {
31473fc4
PS		 2700 if (rc == -ENODATA &&
2701 rsp->hdr.sync_hdr.Status == STATUS_NO_MORE_FILES) {
52755808
PS		 2702 srch_inf->endOfSearch = true;
2703 rc = 0;
2704 }
d324f08d
PS		 2705 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
2706 goto qdir_exit;
2707 }
d324f08d
PS		 2708
2709 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2710 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2711 info_buf_size);
2712 if (rc)
2713 goto qdir_exit;
2714
2715 srch_inf->unicode = true;
2716
2717 if (srch_inf->ntwrk_buf_start) {
2718 if (srch_inf->smallBuf)
2719 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
2720 else
2721 cifs_buf_release(srch_inf->ntwrk_buf_start);
2722 }
2723 srch_inf->ntwrk_buf_start = (char *)rsp;
2724 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
2725 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
2726 /* 4 for rfc1002 length field */
2727 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
2728 srch_inf->entries_in_buffer =
2729 num_entries(srch_inf->srch_entries_start, end_of_smb,
2730 &srch_inf->last_entry, info_buf_size);
2731 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
f96637be
JP		 2732 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
2733 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
2734 srch_inf->srch_entries_start, srch_inf->last_entry);
d324f08d
PS		 2735 if (resp_buftype == CIFS_LARGE_BUFFER)
2736 srch_inf->smallBuf = false;
2737 else if (resp_buftype == CIFS_SMALL_BUFFER)
2738 srch_inf->smallBuf = true;
2739 else
f96637be 2740 cifs_dbg(VFS, "illegal search buffer type\n");
d324f08d 2741
d324f08d
PS		 2742 return rc;
2743
2744qdir_exit:
2745 free_rsp_buf(resp_buftype, rsp);
2746 return rc;
2747}
2748
35143eb5
PS		 2749static int
2750send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
c839ff24 2751 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
35143eb5
PS		 2752 unsigned int num, void **data, unsigned int *size)
2753{
2754 struct smb2_set_info_req *req;
2755 struct smb2_set_info_rsp *rsp = NULL;
2756 struct kvec *iov;
da502f7d 2757 struct kvec rsp_iov;
35143eb5
PS		 2758 int rc = 0;
2759 int resp_buftype;
2760 unsigned int i;
2761 struct TCP_Server_Info *server;
2762 struct cifs_ses *ses = tcon->ses;
2763
2764 if (ses && (ses->server))
2765 server = ses->server;
2766 else
2767 return -EIO;
2768
2769 if (!num)
2770 return -EINVAL;
2771
2772 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
2773 if (!iov)
2774 return -ENOMEM;
2775
2776 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
2777 if (rc) {
2778 kfree(iov);
2779 return rc;
2780 }
2781
31473fc4 2782 req->hdr.sync_hdr.ProcessId = cpu_to_le32(pid);
c839ff24 2783
35143eb5
PS		 2784 req->InfoType = SMB2_O_INFO_FILE;
2785 req->FileInfoClass = info_class;
2786 req->PersistentFileId = persistent_fid;
2787 req->VolatileFileId = volatile_fid;
2788
2789 /* 4 for RFC1001 length and 1 for Buffer */
2790 req->BufferOffset =
2791 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
2792 req->BufferLength = cpu_to_le32(*size);
2793
2794 inc_rfc1001_len(req, *size - 1 /* Buffer */);
2795
2796 memcpy(req->Buffer, *data, *size);
2797
2798 iov[0].iov_base = (char *)req;
2799 /* 4 for RFC1001 length */
2800 iov[0].iov_len = get_rfc1002_length(req) + 4;
2801
2802 for (i = 1; i < num; i++) {
2803 inc_rfc1001_len(req, size[i]);
2804 le32_add_cpu(&req->BufferLength, size[i]);
2805 iov[i].iov_base = (char *)data[i];
2806 iov[i].iov_len = size[i];
2807 }
2808
da502f7d
PS		 2809 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0, &rsp_iov);
2810 cifs_small_buf_release(req);
2811 rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
35143eb5 2812
7d3fb24b 2813 if (rc != 0)
35143eb5 2814 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
7d3fb24b 2815
35143eb5
PS		 2816 free_rsp_buf(resp_buftype, rsp);
2817 kfree(iov);
2818 return rc;
2819}
2820
2821int
2822SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
2823 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2824{
2825 struct smb2_file_rename_info info;
2826 void **data;
2827 unsigned int size[2];
2828 int rc;
2829 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2830
2831 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2832 if (!data)
2833 return -ENOMEM;
2834
2835 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
2836 /* 0 = fail if target already exists */
2837 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2838 info.FileNameLength = cpu_to_le32(len);
2839
2840 data[0] = &info;
2841 size[0] = sizeof(struct smb2_file_rename_info);
2842
2843 data[1] = target_file;
2844 size[1] = len + 2 /* null */;
2845
2846 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
c839ff24
PS		 2847 current->tgid, FILE_RENAME_INFORMATION, 2, data,
2848 size);
35143eb5
PS		 2849 kfree(data);
2850 return rc;
2851}
568798cc 2852
897fba11
SF		 2853int
2854SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
2855 u64 persistent_fid, u64 volatile_fid)
2856{
2857 __u8 delete_pending = 1;
2858 void *data;
2859 unsigned int size;
2860
2861 data = &delete_pending;
2862 size = 1; /* sizeof __u8 */
2863
2864 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2865 current->tgid, FILE_DISPOSITION_INFORMATION, 1, &data,
2866 &size);
2867}
2868
568798cc
PS		 2869int
2870SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
2871 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2872{
2873 struct smb2_file_link_info info;
2874 void **data;
2875 unsigned int size[2];
2876 int rc;
2877 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2878
2879 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2880 if (!data)
2881 return -ENOMEM;
2882
2883 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
2884 /* 0 = fail if link already exists */
2885 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2886 info.FileNameLength = cpu_to_le32(len);
2887
2888 data[0] = &info;
2889 size[0] = sizeof(struct smb2_file_link_info);
2890
2891 data[1] = target_file;
2892 size[1] = len + 2 /* null */;
2893
2894 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
c839ff24 2895 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
568798cc
PS		 2896 kfree(data);
2897 return rc;
2898}
c839ff24
PS		 2899
2900int
2901SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
f29ebb47 2902 u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc)
c839ff24
PS		 2903{
2904 struct smb2_file_eof_info info;
2905 void *data;
2906 unsigned int size;
2907
2908 info.EndOfFile = *eof;
2909
2910 data = &info;
2911 size = sizeof(struct smb2_file_eof_info);
2912
f29ebb47
SF		 2913 if (is_falloc)
2914 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2915 pid, FILE_ALLOCATION_INFORMATION, 1, &data, &size);
2916 else
2917 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2918 pid, FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
c839ff24 2919}
1feeaac7
PS		 2920
2921int
2922SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2923 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
2924{
2925 unsigned int size;
2926 size = sizeof(FILE_BASIC_INFO);
2927 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2928 current->tgid, FILE_BASIC_INFORMATION, 1,
2929 (void **)&buf, &size);
2930}
983c88a4
PS		 2931
2932int
2933SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
2934 const u64 persistent_fid, const u64 volatile_fid,
2935 __u8 oplock_level)
2936{
2937 int rc;
2938 struct smb2_oplock_break *req = NULL;
2939
f96637be 2940 cifs_dbg(FYI, "SMB2_oplock_break\n");
983c88a4
PS		 2941 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2942
2943 if (rc)
2944 return rc;
2945
2946 req->VolatileFid = volatile_fid;
2947 req->PersistentFid = persistent_fid;
2948 req->OplockLevel = oplock_level;
31473fc4 2949 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
983c88a4
PS		 2950
2951 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
da502f7d 2952 cifs_small_buf_release(req);
983c88a4
PS		 2953
2954 if (rc) {
2955 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 2956 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
983c88a4
PS		 2957 }
2958
2959 return rc;
2960}
6fc05c25
PS		 2961
2962static void
2963copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
2964 struct kstatfs *kst)
2965{
2966 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
2967 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
2968 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
2969 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
2970 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
2971 return;
2972}
2973
2974static int
2975build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
2976 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
2977{
2978 int rc;
2979 struct smb2_query_info_req *req;
2980
f96637be 2981 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
6fc05c25
PS		 2982
2983 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
2984 return -EIO;
2985
2986 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2987 if (rc)
2988 return rc;
2989
2990 req->InfoType = SMB2_O_INFO_FILESYSTEM;
2991 req->FileInfoClass = level;
2992 req->PersistentFileId = persistent_fid;
2993 req->VolatileFileId = volatile_fid;
2994 /* 4 for rfc1002 length field and 1 for pad */
2995 req->InputBufferOffset =
2996 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
2997 req->OutputBufferLength = cpu_to_le32(
2998 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
2999
3000 iov->iov_base = (char *)req;
3001 /* 4 for rfc1002 length field */
3002 iov->iov_len = get_rfc1002_length(req) + 4;
3003 return 0;
3004}
3005
3006int
3007SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
3008 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
3009{
3010 struct smb2_query_info_rsp *rsp = NULL;
3011 struct kvec iov;
da502f7d 3012 struct kvec rsp_iov;
6fc05c25
PS		 3013 int rc = 0;
3014 int resp_buftype;
3015 struct cifs_ses *ses = tcon->ses;
3016 struct smb2_fs_full_size_info *info = NULL;
3017
3018 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
3019 sizeof(struct smb2_fs_full_size_info),
3020 persistent_fid, volatile_fid);
3021 if (rc)
3022 return rc;
3023
da502f7d
PS		 3024 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0, &rsp_iov);
3025 cifs_small_buf_release(iov.iov_base);
6fc05c25
PS		 3026 if (rc) {
3027 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
34f62640 3028 goto qfsinf_exit;
6fc05c25 3029 }
da502f7d 3030 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
6fc05c25
PS		 3031
3032 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
3033 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
3034 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
3035 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
3036 sizeof(struct smb2_fs_full_size_info));
3037 if (!rc)
3038 copy_fs_info_to_kstatfs(info, fsdata);
3039
34f62640 3040qfsinf_exit:
da502f7d 3041 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
34f62640
SF		 3042 return rc;
3043}
3044
3045int
3046SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2167114c 3047 u64 persistent_fid, u64 volatile_fid, int level)
34f62640
SF		 3048{
3049 struct smb2_query_info_rsp *rsp = NULL;
3050 struct kvec iov;
da502f7d 3051 struct kvec rsp_iov;
34f62640 3052 int rc = 0;
2167114c 3053 int resp_buftype, max_len, min_len;
34f62640
SF		 3054 struct cifs_ses *ses = tcon->ses;
3055 unsigned int rsp_len, offset;
3056
2167114c
SF		 3057 if (level == FS_DEVICE_INFORMATION) {
3058 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3059 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3060 } else if (level == FS_ATTRIBUTE_INFORMATION) {
3061 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
3062 min_len = MIN_FS_ATTR_INFO_SIZE;
af6a12ea
SF		 3063 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
3064 max_len = sizeof(struct smb3_fs_ss_info);
3065 min_len = sizeof(struct smb3_fs_ss_info);
2167114c 3066 } else {
af6a12ea 3067 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2167114c
SF		 3068 return -EINVAL;
3069 }
3070
3071 rc = build_qfs_info_req(&iov, tcon, level, max_len,
34f62640
SF		 3072 persistent_fid, volatile_fid);
3073 if (rc)
3074 return rc;
3075
da502f7d
PS		 3076 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0, &rsp_iov);
3077 cifs_small_buf_release(iov.iov_base);
34f62640
SF		 3078 if (rc) {
3079 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
3080 goto qfsattr_exit;
3081 }
da502f7d 3082 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
34f62640
SF		 3083
3084 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
3085 offset = le16_to_cpu(rsp->OutputBufferOffset);
2167114c
SF		 3086 rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
3087 if (rc)
3088 goto qfsattr_exit;
3089
3090 if (level == FS_ATTRIBUTE_INFORMATION)
34f62640
SF		 3091 memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
3092 + (char *)&rsp->hdr, min_t(unsigned int,
2167114c
SF		 3093 rsp_len, max_len));
3094 else if (level == FS_DEVICE_INFORMATION)
3095 memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
3096 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
af6a12ea
SF		 3097 else if (level == FS_SECTOR_SIZE_INFORMATION) {
3098 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
3099 (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
3100 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
3101 tcon->perf_sector_size =
3102 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
3103 }
34f62640
SF		 3104
3105qfsattr_exit:
da502f7d 3106 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
6fc05c25
PS		 3107 return rc;
3108}
f7ba7fe6
PS		 3109
3110int
3111smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
3112 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3113 const __u32 num_lock, struct smb2_lock_element *buf)
3114{
3115 int rc = 0;
3116 struct smb2_lock_req *req = NULL;
3117 struct kvec iov[2];
da502f7d 3118 struct kvec rsp_iov;
f7ba7fe6
PS		 3119 int resp_buf_type;
3120 unsigned int count;
3121
f96637be 3122 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
f7ba7fe6
PS		 3123
3124 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
3125 if (rc)
3126 return rc;
3127
31473fc4 3128 req->hdr.sync_hdr.ProcessId = cpu_to_le32(pid);
f7ba7fe6
PS		 3129 req->LockCount = cpu_to_le16(num_lock);
3130
3131 req->PersistentFileId = persist_fid;
3132 req->VolatileFileId = volatile_fid;
3133
3134 count = num_lock * sizeof(struct smb2_lock_element);
3135 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
3136
3137 iov[0].iov_base = (char *)req;
3138 /* 4 for rfc1002 length field and count for all locks */
3139 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
3140 iov[1].iov_base = (char *)buf;
3141 iov[1].iov_len = count;
3142
3143 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
da502f7d
PS		 3144 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP,
3145 &rsp_iov);
3146 cifs_small_buf_release(req);
f7ba7fe6 3147 if (rc) {
f96637be 3148 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
f7ba7fe6
PS		 3149 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
3150 }
3151
3152 return rc;
3153}
3154
3155int
3156SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
3157 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3158 const __u64 length, const __u64 offset, const __u32 lock_flags,
3159 const bool wait)
3160{
3161 struct smb2_lock_element lock;
3162
3163 lock.Offset = cpu_to_le64(offset);
3164 lock.Length = cpu_to_le64(length);
3165 lock.Flags = cpu_to_le32(lock_flags);
3166 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
3167 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
3168
3169 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
3170}
0822f514
PS		 3171
3172int
3173SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
3174 __u8 *lease_key, const __le32 lease_state)
3175{
3176 int rc;
3177 struct smb2_lease_ack *req = NULL;
3178
f96637be 3179 cifs_dbg(FYI, "SMB2_lease_break\n");
0822f514
PS		 3180 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
3181
3182 if (rc)
3183 return rc;
3184
31473fc4 3185 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
0822f514
PS		 3186 req->StructureSize = cpu_to_le16(36);
3187 inc_rfc1001_len(req, 12);
3188
3189 memcpy(req->LeaseKey, lease_key, 16);
3190 req->LeaseState = lease_state;
3191
3192 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
da502f7d 3193 cifs_small_buf_release(req);
0822f514
PS		 3194
3195 if (rc) {
3196 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 3197 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
0822f514
PS		 3198 }
3199
3200 return rc;
3201}
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