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CIFS: let ses->ipc_tid hold smb2 TreeIds
[linux-block.git] / fs / cifs / smb2pdu.c
CommitLineData
ec2e4523
PS		 1/*
2 * fs/cifs/smb2pdu.c
3 *
2b80d049 4 * Copyright (C) International Business Machines Corp., 2009, 2013
ec2e4523
PS		 5 * Etersoft, 2012
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
8 *
9 * Contains the routines for constructing the SMB2 PDUs themselves
10 *
11 * This library is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published
13 * by the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
15 *
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
19 * the GNU Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 */
25
26 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
27 /* Note that there are handle based routines which must be */
28 /* treated slightly differently for reconnection purposes since we never */
29 /* want to reuse a stale file handle and only the caller knows the file info */
30
31#include <linux/fs.h>
32#include <linux/kernel.h>
33#include <linux/vfs.h>
09a4707e 34#include <linux/task_io_accounting_ops.h>
ec2e4523 35#include <linux/uaccess.h>
33319141 36#include <linux/pagemap.h>
ec2e4523
PS		 37#include <linux/xattr.h>
38#include "smb2pdu.h"
39#include "cifsglob.h"
40#include "cifsacl.h"
41#include "cifsproto.h"
42#include "smb2proto.h"
43#include "cifs_unicode.h"
44#include "cifs_debug.h"
45#include "ntlmssp.h"
46#include "smb2status.h"
09a4707e 47#include "smb2glob.h"
d324f08d 48#include "cifspdu.h"
ceb1b0b9 49#include "cifs_spnego.h"
ec2e4523
PS		 50
51/*
52 * The following table defines the expected "StructureSize" of SMB2 requests
53 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
54 *
55 * Note that commands are defined in smb2pdu.h in le16 but the array below is
56 * indexed by command in host byte order.
57 */
58static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
59 /* SMB2_NEGOTIATE */ 36,
60 /* SMB2_SESSION_SETUP */ 25,
61 /* SMB2_LOGOFF */ 4,
62 /* SMB2_TREE_CONNECT */ 9,
63 /* SMB2_TREE_DISCONNECT */ 4,
64 /* SMB2_CREATE */ 57,
65 /* SMB2_CLOSE */ 24,
66 /* SMB2_FLUSH */ 24,
67 /* SMB2_READ */ 49,
68 /* SMB2_WRITE */ 49,
69 /* SMB2_LOCK */ 48,
70 /* SMB2_IOCTL */ 57,
71 /* SMB2_CANCEL */ 4,
72 /* SMB2_ECHO */ 4,
73 /* SMB2_QUERY_DIRECTORY */ 33,
74 /* SMB2_CHANGE_NOTIFY */ 32,
75 /* SMB2_QUERY_INFO */ 41,
76 /* SMB2_SET_INFO */ 33,
77 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
78};
79
7fb8986e
PS		 80static int encryption_required(const struct cifs_tcon *tcon)
81{
ae6f8dd4
PS		 82 if (!tcon)
83 return 0;
7fb8986e
PS		 84 if ((tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
85 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
86 return 1;
ae6f8dd4
PS		 87 if (tcon->seal &&
88 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
89 return 1;
7fb8986e
PS		 90 return 0;
91}
ec2e4523
PS		 92
93static void
cb200bd6 94smb2_hdr_assemble(struct smb2_sync_hdr *shdr, __le16 smb2_cmd,
ec2e4523
PS		 95 const struct cifs_tcon *tcon)
96{
31473fc4
PS		 97 shdr->ProtocolId = SMB2_PROTO_NUMBER;
98 shdr->StructureSize = cpu_to_le16(64);
99 shdr->Command = smb2_cmd;
7d414f39
RL		 100 if (tcon && tcon->ses && tcon->ses->server) {
101 struct TCP_Server_Info *server = tcon->ses->server;
102
103 spin_lock(&server->req_lock);
104 /* Request up to 2 credits but don't go over the limit. */
141891f4 105 if (server->credits >= server->max_credits)
31473fc4 106 shdr->CreditRequest = cpu_to_le16(0);
7d414f39 107 else
31473fc4 108 shdr->CreditRequest = cpu_to_le16(
141891f4 109 min_t(int, server->max_credits -
7d414f39
RL		 110 server->credits, 2));
111 spin_unlock(&server->req_lock);
112 } else {
31473fc4 113 shdr->CreditRequest = cpu_to_le16(2);
7d414f39 114 }
31473fc4 115 shdr->ProcessId = cpu_to_le32((__u16)current->tgid);
ec2e4523
PS		 116
117 if (!tcon)
118 goto out;
119
2b80d049
SF		 120 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
121 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
1dc92c45 122 if ((tcon->ses) && (tcon->ses->server) &&
84ceeb96 123 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
31473fc4 124 shdr->CreditCharge = cpu_to_le16(1);
2b80d049
SF		 125 /* else CreditCharge MBZ */
126
31473fc4 127 shdr->TreeId = tcon->tid;
ec2e4523
PS		 128 /* Uid is not converted */
129 if (tcon->ses)
31473fc4 130 shdr->SessionId = tcon->ses->Suid;
f87ab88b
SF		 131
132 /*
133 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
134 * to pass the path on the Open SMB prefixed by \\server\share.
135 * Not sure when we would need to do the augmented path (if ever) and
136 * setting this flag breaks the SMB2 open operation since it is
137 * illegal to send an empty path name (without \\server\share prefix)
138 * when the DFS flag is set in the SMB open header. We could
139 * consider setting the flag on all operations other than open
140 * but it is safer to net set it for now.
141 */
142/* if (tcon->share_flags & SHI1005_FLAGS_DFS)
31473fc4 143 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
f87ab88b 144
7fb8986e
PS		 145 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign &&
146 !encryption_required(tcon))
31473fc4 147 shdr->Flags |= SMB2_FLAGS_SIGNED;
ec2e4523 148out:
ec2e4523
PS		 149 return;
150}
151
152static int
153smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
154{
155 int rc = 0;
aa24d1e9
PS		 156 struct nls_table *nls_codepage;
157 struct cifs_ses *ses;
158 struct TCP_Server_Info *server;
159
160 /*
161 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
162 * check for tcp and smb session status done differently
163 * for those three - in the calling routine.
164 */
165 if (tcon == NULL)
166 return rc;
167
168 if (smb2_command == SMB2_TREE_CONNECT)
169 return rc;
170
171 if (tcon->tidStatus == CifsExiting) {
172 /*
173 * only tree disconnect, open, and write,
174 * (and ulogoff which does not have tcon)
175 * are allowed as we start force umount.
176 */
177 if ((smb2_command != SMB2_WRITE) &&
178 (smb2_command != SMB2_CREATE) &&
179 (smb2_command != SMB2_TREE_DISCONNECT)) {
f96637be
JP		 180 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
181 smb2_command);
aa24d1e9
PS		 182 return -ENODEV;
183 }
184 }
185 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
186 (!tcon->ses->server))
187 return -EIO;
188
189 ses = tcon->ses;
190 server = ses->server;
191
192 /*
193 * Give demultiplex thread up to 10 seconds to reconnect, should be
194 * greater than cifs socket timeout which is 7 seconds
195 */
196 while (server->tcpStatus == CifsNeedReconnect) {
197 /*
198 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
199 * here since they are implicitly done when session drops.
200 */
201 switch (smb2_command) {
202 /*
203 * BB Should we keep oplock break and add flush to exceptions?
204 */
205 case SMB2_TREE_DISCONNECT:
206 case SMB2_CANCEL:
207 case SMB2_CLOSE:
208 case SMB2_OPLOCK_BREAK:
209 return -EAGAIN;
210 }
211
212 wait_event_interruptible_timeout(server->response_q,
213 (server->tcpStatus != CifsNeedReconnect), 10 * HZ);
214
215 /* are we still trying to reconnect? */
216 if (server->tcpStatus != CifsNeedReconnect)
217 break;
218
219 /*
220 * on "soft" mounts we wait once. Hard mounts keep
221 * retrying until process is killed or server comes
222 * back on-line
223 */
224 if (!tcon->retry) {
f96637be 225 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
aa24d1e9
PS		 226 return -EHOSTDOWN;
227 }
228 }
229
230 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
231 return rc;
232
233 nls_codepage = load_nls_default();
234
235 /*
236 * need to prevent multiple threads trying to simultaneously reconnect
237 * the same SMB session
238 */
239 mutex_lock(&tcon->ses->session_mutex);
240 rc = cifs_negotiate_protocol(0, tcon->ses);
241 if (!rc && tcon->ses->need_reconnect)
242 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
243
244 if (rc || !tcon->need_reconnect) {
245 mutex_unlock(&tcon->ses->session_mutex);
246 goto out;
247 }
248
249 cifs_mark_open_files_invalid(tcon);
96a988ff
PS		 250 if (tcon->use_persistent)
251 tcon->need_reopen_files = true;
52ace1ef 252
aa24d1e9
PS		 253 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
254 mutex_unlock(&tcon->ses->session_mutex);
52ace1ef 255
f96637be 256 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
aa24d1e9
PS		 257 if (rc)
258 goto out;
96a988ff
PS		 259
260 if (smb2_command != SMB2_INTERNAL_CMD)
261 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
262
aa24d1e9 263 atomic_inc(&tconInfoReconnectCount);
aa24d1e9
PS		 264out:
265 /*
266 * Check if handle based operation so we know whether we can continue
267 * or not without returning to caller to reset file handle.
268 */
269 /*
270 * BB Is flush done by server on drop of tcp session? Should we special
271 * case it and skip above?
272 */
273 switch (smb2_command) {
274 case SMB2_FLUSH:
275 case SMB2_READ:
276 case SMB2_WRITE:
277 case SMB2_LOCK:
278 case SMB2_IOCTL:
279 case SMB2_QUERY_DIRECTORY:
280 case SMB2_CHANGE_NOTIFY:
281 case SMB2_QUERY_INFO:
282 case SMB2_SET_INFO:
4772c795 283 rc = -EAGAIN;
aa24d1e9
PS		 284 }
285 unload_nls(nls_codepage);
ec2e4523
PS		 286 return rc;
287}
288
cb200bd6
PS		 289static void
290fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, void *buf,
291 unsigned int *total_len)
292{
293 struct smb2_sync_pdu *spdu = (struct smb2_sync_pdu *)buf;
294 /* lookup word count ie StructureSize from table */
295 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)];
296
297 /*
298 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
299 * largest operations (Create)
300 */
301 memset(buf, 0, 256);
302
303 smb2_hdr_assemble(&spdu->sync_hdr, smb2_command, tcon);
304 spdu->StructureSize2 = cpu_to_le16(parmsize);
305
306 *total_len = parmsize + sizeof(struct smb2_sync_hdr);
307}
308
b8f57ee8
PS		 309/* init request without RFC1001 length at the beginning */
310static int
311smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
312 void **request_buf, unsigned int *total_len)
313{
314 int rc;
315 struct smb2_sync_hdr *shdr;
316
317 rc = smb2_reconnect(smb2_command, tcon);
318 if (rc)
319 return rc;
320
321 /* BB eventually switch this to SMB2 specific small buf size */
322 *request_buf = cifs_small_buf_get();
323 if (*request_buf == NULL) {
324 /* BB should we add a retry in here if not a writepage? */
325 return -ENOMEM;
326 }
327
328 shdr = (struct smb2_sync_hdr *)(*request_buf);
329
330 fill_small_buf(smb2_command, tcon, shdr, total_len);
331
332 if (tcon != NULL) {
333#ifdef CONFIG_CIFS_STATS2
334 uint16_t com_code = le16_to_cpu(smb2_command);
335
336 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
337#endif
338 cifs_stats_inc(&tcon->num_smbs_sent);
339 }
340
341 return rc;
342}
343
ec2e4523
PS		 344/*
345 * Allocate and return pointer to an SMB request hdr, and set basic
346 * SMB information in the SMB header. If the return code is zero, this
b8f57ee8
PS		 347 * function must have filled in request_buf pointer. The returned buffer
348 * has RFC1001 length at the beginning.
ec2e4523
PS		 349 */
350static int
351small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
352 void **request_buf)
353{
cb200bd6
PS		 354 int rc;
355 unsigned int total_len;
356 struct smb2_pdu *pdu;
ec2e4523
PS		 357
358 rc = smb2_reconnect(smb2_command, tcon);
359 if (rc)
360 return rc;
361
362 /* BB eventually switch this to SMB2 specific small buf size */
363 *request_buf = cifs_small_buf_get();
364 if (*request_buf == NULL) {
365 /* BB should we add a retry in here if not a writepage? */
366 return -ENOMEM;
367 }
368
cb200bd6
PS		 369 pdu = (struct smb2_pdu *)(*request_buf);
370
371 fill_small_buf(smb2_command, tcon, get_sync_hdr(pdu), &total_len);
372
373 /* Note this is only network field converted to big endian */
374 pdu->hdr.smb2_buf_length = cpu_to_be32(total_len);
ec2e4523
PS		 375
376 if (tcon != NULL) {
377#ifdef CONFIG_CIFS_STATS2
ec2e4523
PS		 378 uint16_t com_code = le16_to_cpu(smb2_command);
379 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
ec2e4523
PS		 380#endif
381 cifs_stats_inc(&tcon->num_smbs_sent);
382 }
383
384 return rc;
385}
386
ebb3a9d4
SF		 387#ifdef CONFIG_CIFS_SMB311
388/* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
389#define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
390
391
392#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
393#define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
394
395static void
396build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
397{
398 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
399 pneg_ctxt->DataLength = cpu_to_le16(38);
400 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
401 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
402 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
403 pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
404}
405
406static void
407build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
408{
409 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
410 pneg_ctxt->DataLength = cpu_to_le16(6);
411 pneg_ctxt->CipherCount = cpu_to_le16(2);
412 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
413 pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM;
414}
415
416static void
417assemble_neg_contexts(struct smb2_negotiate_req *req)
418{
419
420 /* +4 is to account for the RFC1001 len field */
421 char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT + 4;
422
423 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
424 /* Add 2 to size to round to 8 byte boundary */
425 pneg_ctxt += 2 + sizeof(struct smb2_preauth_neg_context);
426 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
427 req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
428 req->NegotiateContextCount = cpu_to_le16(2);
429 inc_rfc1001_len(req, 4 + sizeof(struct smb2_preauth_neg_context) + 2
430 + sizeof(struct smb2_encryption_neg_context)); /* calculate hash */
431}
432#else
433static void assemble_neg_contexts(struct smb2_negotiate_req *req)
434{
435 return;
436}
437#endif /* SMB311 */
438
ec2e4523
PS		 439/*
440 *
441 * SMB2 Worker functions follow:
442 *
443 * The general structure of the worker functions is:
444 * 1) Call smb2_init (assembles SMB2 header)
445 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
446 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
447 * 4) Decode SMB2 command specific fields in the fixed length area
448 * 5) Decode variable length data area (if any for this SMB2 command type)
449 * 6) Call free smb buffer
450 * 7) return
451 *
452 */
453
454int
455SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
456{
457 struct smb2_negotiate_req *req;
458 struct smb2_negotiate_rsp *rsp;
459 struct kvec iov[1];
da502f7d 460 struct kvec rsp_iov;
ec2e4523
PS		 461 int rc = 0;
462 int resp_buftype;
3534b850 463 struct TCP_Server_Info *server = ses->server;
ec2e4523
PS		 464 int blob_offset, blob_length;
465 char *security_blob;
466 int flags = CIFS_NEG_OP;
467
f96637be 468 cifs_dbg(FYI, "Negotiate protocol\n");
ec2e4523 469
3534b850
JL		 470 if (!server) {
471 WARN(1, "%s: server is NULL!\n", __func__);
472 return -EIO;
ec2e4523
PS		 473 }
474
475 rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
476 if (rc)
477 return rc;
478
31473fc4 479 req->hdr.sync_hdr.SessionId = 0;
ec2e4523 480
e4aa25e7 481 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
ec2e4523 482
e4aa25e7
SF		 483 req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */
484 inc_rfc1001_len(req, 2);
ec2e4523
PS		 485
486 /* only one of SMB2 signing flags may be set in SMB2 request */
38d77c50 487 if (ses->sign)
9cd2e62c 488 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
38d77c50 489 else if (global_secflags & CIFSSEC_MAY_SIGN)
9cd2e62c 490 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
38d77c50
JL		 491 else
492 req->SecurityMode = 0;
ec2e4523 493
e4aa25e7 494 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
ec2e4523 495
3c5f9be1
SF		 496 /* ClientGUID must be zero for SMB2.02 dialect */
497 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
498 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
ebb3a9d4 499 else {
3c5f9be1
SF		 500 memcpy(req->ClientGUID, server->client_guid,
501 SMB2_CLIENT_GUID_SIZE);
ebb3a9d4
SF		 502 if (ses->server->vals->protocol_id == SMB311_PROT_ID)
503 assemble_neg_contexts(req);
504 }
ec2e4523
PS		 505 iov[0].iov_base = (char *)req;
506 /* 4 for rfc1002 length field */
507 iov[0].iov_len = get_rfc1002_length(req) + 4;
508
da502f7d
PS		 509 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
510 cifs_small_buf_release(req);
511 rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base;
ec2e4523
PS		 512 /*
513 * No tcon so can't do
514 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
515 */
516 if (rc != 0)
517 goto neg_exit;
518
f96637be 519 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
ec2e4523 520
e4aa25e7
SF		 521 /* BB we may eventually want to match the negotiated vs. requested
522 dialect, even though we are only requesting one at a time */
523 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
f96637be 524 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
e4aa25e7 525 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
f96637be 526 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
e4aa25e7 527 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
f96637be 528 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
20b6d8b4
SF		 529 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
530 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
5f7fbf73
SF		 531#ifdef CONFIG_CIFS_SMB311
532 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
533 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
534#endif /* SMB311 */
ec2e4523 535 else {
f799d623 536 cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
f96637be 537 le16_to_cpu(rsp->DialectRevision));
ec2e4523
PS		 538 rc = -EIO;
539 goto neg_exit;
540 }
541 server->dialect = le16_to_cpu(rsp->DialectRevision);
542
e598d1d8
JL		 543 /* SMB2 only has an extended negflavor */
544 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
2365c4ea
PS		 545 /* set it to the maximum buffer size value we can send with 1 credit */
546 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
547 SMB2_MAX_BUFFER_SIZE);
ec2e4523
PS		 548 server->max_read = le32_to_cpu(rsp->MaxReadSize);
549 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
550 /* BB Do we need to validate the SecurityMode? */
551 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
552 server->capabilities = le32_to_cpu(rsp->Capabilities);
29e20f9c
PS		 553 /* Internal types */
554 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
ec2e4523
PS		 555
556 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
557 &rsp->hdr);
5d875cc9
SF		 558 /*
559 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
560 * for us will be
561 * ses->sectype = RawNTLMSSP;
562 * but for time being this is our only auth choice so doesn't matter.
563 * We just found a server which sets blob length to zero expecting raw.
564 */
565 if (blob_length == 0)
566 cifs_dbg(FYI, "missing security blob on negprot\n");
3c1bf7e4 567
38d77c50 568 rc = cifs_enable_signing(server, ses->sign);
9ddec561
JL		 569 if (rc)
570 goto neg_exit;
ceb1b0b9 571 if (blob_length) {
ebdd207e 572 rc = decode_negTokenInit(security_blob, blob_length, server);
ceb1b0b9
SF		 573 if (rc == 1)
574 rc = 0;
575 else if (rc == 0)
576 rc = -EIO;
ec2e4523 577 }
ec2e4523
PS		 578neg_exit:
579 free_rsp_buf(resp_buftype, rsp);
580 return rc;
581}
5478f9ba 582
ff1c038a
SF		 583int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
584{
585 int rc = 0;
586 struct validate_negotiate_info_req vneg_inbuf;
587 struct validate_negotiate_info_rsp *pneg_rsp;
588 u32 rsplen;
589
590 cifs_dbg(FYI, "validate negotiate\n");
591
592 /*
593 * validation ioctl must be signed, so no point sending this if we
594 * can not sign it. We could eventually change this to selectively
595 * sign just this, the first and only signed request on a connection.
596 * This is good enough for now since a user who wants better security
597 * would also enable signing on the mount. Having validation of
598 * negotiate info for signed connections helps reduce attack vectors
599 */
600 if (tcon->ses->server->sign == false)
601 return 0; /* validation requires signing */
602
603 vneg_inbuf.Capabilities =
604 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
39552ea8
SP		 605 memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid,
606 SMB2_CLIENT_GUID_SIZE);
ff1c038a
SF		 607
608 if (tcon->ses->sign)
609 vneg_inbuf.SecurityMode =
610 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
611 else if (global_secflags & CIFSSEC_MAY_SIGN)
612 vneg_inbuf.SecurityMode =
613 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
614 else
615 vneg_inbuf.SecurityMode = 0;
616
617 vneg_inbuf.DialectCount = cpu_to_le16(1);
618 vneg_inbuf.Dialects[0] =
619 cpu_to_le16(tcon->ses->server->vals->protocol_id);
620
621 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
622 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
51146625 623 false /* use_ipc */,
ff1c038a
SF		 624 (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
625 (char **)&pneg_rsp, &rsplen);
626
627 if (rc != 0) {
628 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
629 return -EIO;
630 }
631
632 if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
633 cifs_dbg(VFS, "invalid size of protocol negotiate response\n");
634 return -EIO;
635 }
636
637 /* check validate negotiate info response matches what we got earlier */
638 if (pneg_rsp->Dialect !=
639 cpu_to_le16(tcon->ses->server->vals->protocol_id))
640 goto vneg_out;
641
642 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
643 goto vneg_out;
644
645 /* do not validate server guid because not saved at negprot time yet */
646
647 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
648 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
649 goto vneg_out;
650
651 /* validate negotiate successful */
652 cifs_dbg(FYI, "validate negotiate info successful\n");
653 return 0;
654
655vneg_out:
656 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
657 return -EIO;
658}
659
3baf1a7b
SP		 660struct SMB2_sess_data {
661 unsigned int xid;
662 struct cifs_ses *ses;
663 struct nls_table *nls_cp;
664 void (*func)(struct SMB2_sess_data *);
665 int result;
666 u64 previous_session;
667
668 /* we will send the SMB in three pieces:
669 * a fixed length beginning part, an optional
670 * SPNEGO blob (which can be zero length), and a
671 * last part which will include the strings
672 * and rest of bcc area. This allows us to avoid
673 * a large buffer 17K allocation
674 */
675 int buf0_type;
676 struct kvec iov[2];
677};
678
679static int
680SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
681{
682 int rc;
683 struct cifs_ses *ses = sess_data->ses;
684 struct smb2_sess_setup_req *req;
685 struct TCP_Server_Info *server = ses->server;
686
687 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
688 if (rc)
689 return rc;
690
31473fc4
PS		 691 /* First session, not a reauthenticate */
692 req->hdr.sync_hdr.SessionId = 0;
3baf1a7b
SP		 693
694 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
695 req->PreviousSessionId = sess_data->previous_session;
696
697 req->Flags = 0; /* MBZ */
698 /* to enable echos and oplocks */
31473fc4 699 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(3);
3baf1a7b
SP		 700
701 /* only one of SMB2 signing flags may be set in SMB2 request */
702 if (server->sign)
703 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
704 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
705 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
706 else
707 req->SecurityMode = 0;
708
709 req->Capabilities = 0;
710 req->Channel = 0; /* MBZ */
711
712 sess_data->iov[0].iov_base = (char *)req;
713 /* 4 for rfc1002 length field and 1 for pad */
714 sess_data->iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
715 /*
716 * This variable will be used to clear the buffer
717 * allocated above in case of any error in the calling function.
718 */
719 sess_data->buf0_type = CIFS_SMALL_BUFFER;
720
721 return 0;
722}
723
724static void
725SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
726{
727 free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
728 sess_data->buf0_type = CIFS_NO_BUFFER;
729}
730
731static int
732SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
733{
734 int rc;
735 struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
da502f7d 736 struct kvec rsp_iov = { NULL, 0 };
3baf1a7b
SP		 737
738 /* Testing shows that buffer offset must be at location of Buffer[0] */
739 req->SecurityBufferOffset =
740 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
741 1 /* pad */ - 4 /* rfc1001 len */);
742 req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
743
744 inc_rfc1001_len(req, sess_data->iov[1].iov_len - 1 /* pad */);
745
746 /* BB add code to build os and lm fields */
747
748 rc = SendReceive2(sess_data->xid, sess_data->ses,
749 sess_data->iov, 2,
750 &sess_data->buf0_type,
da502f7d
PS		 751 CIFS_LOG_ERROR | CIFS_NEG_OP, &rsp_iov);
752 cifs_small_buf_release(sess_data->iov[0].iov_base);
753 memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
3baf1a7b
SP		 754
755 return rc;
756}
757
758static int
759SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
760{
761 int rc = 0;
762 struct cifs_ses *ses = sess_data->ses;
763
764 mutex_lock(&ses->server->srv_mutex);
cabfb368 765 if (ses->server->ops->generate_signingkey) {
3baf1a7b 766 rc = ses->server->ops->generate_signingkey(ses);
3baf1a7b
SP		 767 if (rc) {
768 cifs_dbg(FYI,
769 "SMB3 session key generation failed\n");
770 mutex_unlock(&ses->server->srv_mutex);
cabfb368 771 return rc;
3baf1a7b
SP		 772 }
773 }
774 if (!ses->server->session_estab) {
775 ses->server->sequence_number = 0x2;
776 ses->server->session_estab = true;
777 }
778 mutex_unlock(&ses->server->srv_mutex);
779
780 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
781 spin_lock(&GlobalMid_Lock);
782 ses->status = CifsGood;
783 ses->need_reconnect = false;
784 spin_unlock(&GlobalMid_Lock);
3baf1a7b
SP		 785 return rc;
786}
787
788#ifdef CONFIG_CIFS_UPCALL
789static void
790SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
791{
792 int rc;
793 struct cifs_ses *ses = sess_data->ses;
794 struct cifs_spnego_msg *msg;
795 struct key *spnego_key = NULL;
796 struct smb2_sess_setup_rsp *rsp = NULL;
797
798 rc = SMB2_sess_alloc_buffer(sess_data);
799 if (rc)
800 goto out;
801
802 spnego_key = cifs_get_spnego_key(ses);
803 if (IS_ERR(spnego_key)) {
804 rc = PTR_ERR(spnego_key);
805 spnego_key = NULL;
806 goto out;
807 }
808
809 msg = spnego_key->payload.data[0];
810 /*
811 * check version field to make sure that cifs.upcall is
812 * sending us a response in an expected form
813 */
814 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
815 cifs_dbg(VFS,
816 "bad cifs.upcall version. Expected %d got %d",
817 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
818 rc = -EKEYREJECTED;
819 goto out_put_spnego_key;
820 }
821
822 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
823 GFP_KERNEL);
824 if (!ses->auth_key.response) {
825 cifs_dbg(VFS,
826 "Kerberos can't allocate (%u bytes) memory",
827 msg->sesskey_len);
828 rc = -ENOMEM;
829 goto out_put_spnego_key;
830 }
831 ses->auth_key.len = msg->sesskey_len;
832
833 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
834 sess_data->iov[1].iov_len = msg->secblob_len;
835
836 rc = SMB2_sess_sendreceive(sess_data);
837 if (rc)
838 goto out_put_spnego_key;
839
840 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
31473fc4 841 ses->Suid = rsp->hdr.sync_hdr.SessionId;
3baf1a7b
SP		 842
843 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
3baf1a7b
SP		 844
845 rc = SMB2_sess_establish_session(sess_data);
846out_put_spnego_key:
847 key_invalidate(spnego_key);
848 key_put(spnego_key);
849out:
850 sess_data->result = rc;
851 sess_data->func = NULL;
852 SMB2_sess_free_buffer(sess_data);
853}
854#else
855static void
856SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
857{
858 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
859 sess_data->result = -EOPNOTSUPP;
860 sess_data->func = NULL;
861}
862#endif
863
166cea4d
SP		 864static void
865SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
866
867static void
868SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
5478f9ba 869{
166cea4d
SP		 870 int rc;
871 struct cifs_ses *ses = sess_data->ses;
5478f9ba 872 struct smb2_sess_setup_rsp *rsp = NULL;
166cea4d 873 char *ntlmssp_blob = NULL;
5478f9ba 874 bool use_spnego = false; /* else use raw ntlmssp */
166cea4d 875 u16 blob_length = 0;
d4e63bd6 876
5478f9ba
PS		 877 /*
878 * If memory allocation is successful, caller of this function
879 * frees it.
880 */
881 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
166cea4d
SP		 882 if (!ses->ntlmssp) {
883 rc = -ENOMEM;
884 goto out_err;
885 }
5c234aa5 886 ses->ntlmssp->sesskey_per_smbsess = true;
5478f9ba 887
166cea4d 888 rc = SMB2_sess_alloc_buffer(sess_data);
5478f9ba 889 if (rc)
166cea4d 890 goto out_err;
5478f9ba 891
166cea4d
SP		 892 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
893 GFP_KERNEL);
894 if (ntlmssp_blob == NULL) {
895 rc = -ENOMEM;
896 goto out;
897 }
c2afb814 898
166cea4d
SP		 899 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
900 if (use_spnego) {
901 /* BB eventually need to add this */
902 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
903 rc = -EOPNOTSUPP;
904 goto out;
905 } else {
906 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
907 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
908 }
909 sess_data->iov[1].iov_base = ntlmssp_blob;
910 sess_data->iov[1].iov_len = blob_length;
c2afb814 911
166cea4d
SP		 912 rc = SMB2_sess_sendreceive(sess_data);
913 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
5478f9ba 914
166cea4d
SP		 915 /* If true, rc here is expected and not an error */
916 if (sess_data->buf0_type != CIFS_NO_BUFFER &&
31473fc4 917 rsp->hdr.sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
166cea4d 918 rc = 0;
38d77c50 919
166cea4d
SP		 920 if (rc)
921 goto out;
5478f9ba 922
166cea4d
SP		 923 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
924 le16_to_cpu(rsp->SecurityBufferOffset)) {
925 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
926 le16_to_cpu(rsp->SecurityBufferOffset));
5478f9ba 927 rc = -EIO;
166cea4d 928 goto out;
5478f9ba 929 }
166cea4d
SP		 930 rc = decode_ntlmssp_challenge(rsp->Buffer,
931 le16_to_cpu(rsp->SecurityBufferLength), ses);
932 if (rc)
933 goto out;
5478f9ba 934
166cea4d 935 cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
5478f9ba 936
5478f9ba 937
31473fc4 938 ses->Suid = rsp->hdr.sync_hdr.SessionId;
166cea4d 939 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
166cea4d
SP		 940
941out:
942 kfree(ntlmssp_blob);
943 SMB2_sess_free_buffer(sess_data);
944 if (!rc) {
945 sess_data->result = 0;
946 sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
947 return;
948 }
949out_err:
950 kfree(ses->ntlmssp);
951 ses->ntlmssp = NULL;
952 sess_data->result = rc;
953 sess_data->func = NULL;
954}
5478f9ba 955
166cea4d
SP		 956static void
957SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
958{
959 int rc;
960 struct cifs_ses *ses = sess_data->ses;
961 struct smb2_sess_setup_req *req;
962 struct smb2_sess_setup_rsp *rsp = NULL;
963 unsigned char *ntlmssp_blob = NULL;
964 bool use_spnego = false; /* else use raw ntlmssp */
965 u16 blob_length = 0;
5478f9ba 966
166cea4d
SP		 967 rc = SMB2_sess_alloc_buffer(sess_data);
968 if (rc)
969 goto out;
5478f9ba 970
166cea4d 971 req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
31473fc4 972 req->hdr.sync_hdr.SessionId = ses->Suid;
166cea4d
SP		 973
974 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
975 sess_data->nls_cp);
976 if (rc) {
977 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
978 goto out;
5478f9ba
PS		 979 }
980
166cea4d
SP		 981 if (use_spnego) {
982 /* BB eventually need to add this */
983 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
984 rc = -EOPNOTSUPP;
985 goto out;
986 }
987 sess_data->iov[1].iov_base = ntlmssp_blob;
988 sess_data->iov[1].iov_len = blob_length;
5478f9ba 989
166cea4d
SP		 990 rc = SMB2_sess_sendreceive(sess_data);
991 if (rc)
992 goto out;
993
994 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
995
31473fc4 996 ses->Suid = rsp->hdr.sync_hdr.SessionId;
5478f9ba 997 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
5478f9ba 998
166cea4d
SP		 999 rc = SMB2_sess_establish_session(sess_data);
1000out:
1001 kfree(ntlmssp_blob);
1002 SMB2_sess_free_buffer(sess_data);
1003 kfree(ses->ntlmssp);
1004 ses->ntlmssp = NULL;
1005 sess_data->result = rc;
1006 sess_data->func = NULL;
1007}
d4e63bd6 1008
166cea4d
SP		 1009static int
1010SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data)
1011{
1012 if (ses->sectype != Kerberos && ses->sectype != RawNTLMSSP)
1013 ses->sectype = RawNTLMSSP;
d4e63bd6 1014
166cea4d
SP		 1015 switch (ses->sectype) {
1016 case Kerberos:
1017 sess_data->func = SMB2_auth_kerberos;
1018 break;
1019 case RawNTLMSSP:
1020 sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
1021 break;
1022 default:
1023 cifs_dbg(VFS, "secType %d not supported!\n", ses->sectype);
1024 return -EOPNOTSUPP;
d4e63bd6
SP		 1025 }
1026
166cea4d
SP		 1027 return 0;
1028}
1029
1030int
1031SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
1032 const struct nls_table *nls_cp)
1033{
1034 int rc = 0;
1035 struct TCP_Server_Info *server = ses->server;
1036 struct SMB2_sess_data *sess_data;
1037
1038 cifs_dbg(FYI, "Session Setup\n");
1039
1040 if (!server) {
1041 WARN(1, "%s: server is NULL!\n", __func__);
1042 return -EIO;
d4e63bd6 1043 }
d4e63bd6 1044
166cea4d
SP		 1045 sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
1046 if (!sess_data)
1047 return -ENOMEM;
1048
1049 rc = SMB2_select_sec(ses, sess_data);
1050 if (rc)
1051 goto out;
1052 sess_data->xid = xid;
1053 sess_data->ses = ses;
1054 sess_data->buf0_type = CIFS_NO_BUFFER;
1055 sess_data->nls_cp = (struct nls_table *) nls_cp;
1056
1057 while (sess_data->func)
1058 sess_data->func(sess_data);
1059
3baf1a7b 1060 rc = sess_data->result;
166cea4d 1061out:
3baf1a7b 1062 kfree(sess_data);
5478f9ba
PS		 1063 return rc;
1064}
1065
1066int
1067SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
1068{
1069 struct smb2_logoff_req *req; /* response is also trivial struct */
1070 int rc = 0;
1071 struct TCP_Server_Info *server;
7fb8986e 1072 int flags = 0;
5478f9ba 1073
f96637be 1074 cifs_dbg(FYI, "disconnect session %p\n", ses);
5478f9ba
PS		 1075
1076 if (ses && (ses->server))
1077 server = ses->server;
1078 else
1079 return -EIO;
1080
eb4c7df6
SP		 1081 /* no need to send SMB logoff if uid already closed due to reconnect */
1082 if (ses->need_reconnect)
1083 goto smb2_session_already_dead;
1084
5478f9ba
PS		 1085 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
1086 if (rc)
1087 return rc;
1088
1089 /* since no tcon, smb2_init can not do this, so do here */
31473fc4 1090 req->hdr.sync_hdr.SessionId = ses->Suid;
7fb8986e
PS		 1091
1092 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
1093 flags |= CIFS_TRANSFORM_REQ;
1094 else if (server->sign)
31473fc4 1095 req->hdr.sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
5478f9ba 1096
7fb8986e 1097 rc = SendReceiveNoRsp(xid, ses, (char *) req, flags);
da502f7d 1098 cifs_small_buf_release(req);
5478f9ba
PS		 1099 /*
1100 * No tcon so can't do
1101 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1102 */
eb4c7df6
SP		 1103
1104smb2_session_already_dead:
5478f9ba
PS		 1105 return rc;
1106}
faaf946a
PS		 1107
1108static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
1109{
d60622eb 1110 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
faaf946a
PS		 1111}
1112
1113#define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1114
de9f68df
SF		 1115/* These are similar values to what Windows uses */
1116static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
1117{
1118 tcon->max_chunks = 256;
1119 tcon->max_bytes_chunk = 1048576;
1120 tcon->max_bytes_copy = 16777216;
1121}
1122
faaf946a
PS		 1123int
1124SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
1125 struct cifs_tcon *tcon, const struct nls_table *cp)
1126{
1127 struct smb2_tree_connect_req *req;
1128 struct smb2_tree_connect_rsp *rsp = NULL;
1129 struct kvec iov[2];
da502f7d 1130 struct kvec rsp_iov;
faaf946a
PS		 1131 int rc = 0;
1132 int resp_buftype;
1133 int unc_path_len;
1134 struct TCP_Server_Info *server;
1135 __le16 *unc_path = NULL;
7fb8986e 1136 int flags = 0;
faaf946a 1137
f96637be 1138 cifs_dbg(FYI, "TCON\n");
faaf946a
PS		 1139
1140 if ((ses->server) && tree)
1141 server = ses->server;
1142 else
1143 return -EIO;
1144
1145 if (tcon && tcon->bad_network_name)
1146 return -ENOENT;
1147
1148 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
1149 if (unc_path == NULL)
1150 return -ENOMEM;
1151
1152 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
1153 unc_path_len *= 2;
1154 if (unc_path_len < 2) {
1155 kfree(unc_path);
1156 return -EINVAL;
1157 }
1158
1159 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
1160 if (rc) {
1161 kfree(unc_path);
1162 return rc;
1163 }
1164
1165 if (tcon == NULL) {
ae6f8dd4
PS		 1166 if ((ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA))
1167 flags |= CIFS_TRANSFORM_REQ;
1168
faaf946a 1169 /* since no tcon, smb2_init can not do this, so do here */
31473fc4 1170 req->hdr.sync_hdr.SessionId = ses->Suid;
faaf946a
PS		 1171 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
1172 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
ae6f8dd4
PS		 1173 } else if (encryption_required(tcon))
1174 flags |= CIFS_TRANSFORM_REQ;
faaf946a
PS		 1175
1176 iov[0].iov_base = (char *)req;
1177 /* 4 for rfc1002 length field and 1 for pad */
1178 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1179
1180 /* Testing shows that buffer offset must be at location of Buffer[0] */
1181 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
1182 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
1183 req->PathLength = cpu_to_le16(unc_path_len - 2);
1184 iov[1].iov_base = unc_path;
1185 iov[1].iov_len = unc_path_len;
1186
1187 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
1188
7fb8986e 1189 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1190 cifs_small_buf_release(req);
1191 rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
faaf946a
PS		 1192
1193 if (rc != 0) {
1194 if (tcon) {
1195 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
1196 tcon->need_reconnect = true;
1197 }
1198 goto tcon_error_exit;
1199 }
1200
faaf946a 1201 if (tcon == NULL) {
31473fc4 1202 ses->ipc_tid = rsp->hdr.sync_hdr.TreeId;
faaf946a
PS		 1203 goto tcon_exit;
1204 }
1205
1206 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
f96637be 1207 cifs_dbg(FYI, "connection to disk share\n");
faaf946a
PS		 1208 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
1209 tcon->ipc = true;
f96637be 1210 cifs_dbg(FYI, "connection to pipe share\n");
faaf946a
PS		 1211 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
1212 tcon->print = true;
f96637be 1213 cifs_dbg(FYI, "connection to printer\n");
faaf946a 1214 } else {
f96637be 1215 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
faaf946a
PS		 1216 rc = -EOPNOTSUPP;
1217 goto tcon_error_exit;
1218 }
1219
1220 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
769ee6a4 1221 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
faaf946a
PS		 1222 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1223 tcon->tidStatus = CifsGood;
1224 tcon->need_reconnect = false;
31473fc4 1225 tcon->tid = rsp->hdr.sync_hdr.TreeId;
46b51d08 1226 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
faaf946a
PS		 1227
1228 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1229 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
f96637be 1230 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
ae6f8dd4
PS		 1231
1232 if (tcon->seal &&
1233 !(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
1234 cifs_dbg(VFS, "Encryption is requested but not supported\n");
1235
de9f68df 1236 init_copy_chunk_defaults(tcon);
ff1c038a
SF		 1237 if (tcon->ses->server->ops->validate_negotiate)
1238 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
faaf946a
PS		 1239tcon_exit:
1240 free_rsp_buf(resp_buftype, rsp);
1241 kfree(unc_path);
1242 return rc;
1243
1244tcon_error_exit:
31473fc4 1245 if (rsp->hdr.sync_hdr.Status == STATUS_BAD_NETWORK_NAME) {
f96637be 1246 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
18f39e7b
SF		 1247 if (tcon)
1248 tcon->bad_network_name = true;
faaf946a
PS		 1249 }
1250 goto tcon_exit;
1251}
1252
1253int
1254SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1255{
1256 struct smb2_tree_disconnect_req *req; /* response is trivial */
1257 int rc = 0;
1258 struct TCP_Server_Info *server;
1259 struct cifs_ses *ses = tcon->ses;
7fb8986e 1260 int flags = 0;
faaf946a 1261
f96637be 1262 cifs_dbg(FYI, "Tree Disconnect\n");
faaf946a
PS		 1263
1264 if (ses && (ses->server))
1265 server = ses->server;
1266 else
1267 return -EIO;
1268
1269 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1270 return 0;
1271
1272 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
1273 if (rc)
1274 return rc;
1275
7fb8986e
PS		 1276 if (encryption_required(tcon))
1277 flags |= CIFS_TRANSFORM_REQ;
1278
1279 rc = SendReceiveNoRsp(xid, ses, (char *)req, flags);
da502f7d 1280 cifs_small_buf_release(req);
faaf946a
PS		 1281 if (rc)
1282 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1283
1284 return rc;
1285}
2503a0db 1286
b8c32dbb 1287
63eb3def
PS		 1288static struct create_durable *
1289create_durable_buf(void)
1290{
1291 struct create_durable *buf;
1292
1293 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1294 if (!buf)
1295 return NULL;
1296
1297 buf->ccontext.DataOffset = cpu_to_le16(offsetof
9cbc0b73 1298 (struct create_durable, Data));
63eb3def
PS		 1299 buf->ccontext.DataLength = cpu_to_le32(16);
1300 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1301 (struct create_durable, Name));
1302 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 1303 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
63eb3def
PS		 1304 buf->Name[0] = 'D';
1305 buf->Name[1] = 'H';
1306 buf->Name[2] = 'n';
1307 buf->Name[3] = 'Q';
1308 return buf;
1309}
1310
9cbc0b73
PS		 1311static struct create_durable *
1312create_reconnect_durable_buf(struct cifs_fid *fid)
1313{
1314 struct create_durable *buf;
1315
1316 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1317 if (!buf)
1318 return NULL;
1319
1320 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1321 (struct create_durable, Data));
1322 buf->ccontext.DataLength = cpu_to_le32(16);
1323 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1324 (struct create_durable, Name));
1325 buf->ccontext.NameLength = cpu_to_le16(4);
1326 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1327 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
12197a7f 1328 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
9cbc0b73
PS		 1329 buf->Name[0] = 'D';
1330 buf->Name[1] = 'H';
1331 buf->Name[2] = 'n';
1332 buf->Name[3] = 'C';
1333 return buf;
1334}
1335
b8c32dbb 1336static __u8
42873b0a
PS		 1337parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
1338 unsigned int *epoch)
b8c32dbb
PS		 1339{
1340 char *data_offset;
b5c7cde3 1341 struct create_context *cc;
deb7deff
JM		 1342 unsigned int next;
1343 unsigned int remaining;
fd554396 1344 char *name;
b8c32dbb 1345
fd554396 1346 data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
deb7deff 1347 remaining = le32_to_cpu(rsp->CreateContextsLength);
b5c7cde3 1348 cc = (struct create_context *)data_offset;
deb7deff 1349 while (remaining >= sizeof(struct create_context)) {
b5c7cde3 1350 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
deb7deff
JM		 1351 if (le16_to_cpu(cc->NameLength) == 4 &&
1352 strncmp(name, "RqLs", 4) == 0)
1353 return server->ops->parse_lease_buf(cc, epoch);
1354
1355 next = le32_to_cpu(cc->Next);
1356 if (!next)
1357 break;
1358 remaining -= next;
1359 cc = (struct create_context *)((char *)cc + next);
1360 }
b8c32dbb 1361
b5c7cde3 1362 return 0;
b8c32dbb
PS		 1363}
1364
d22cbfec 1365static int
a41a28bd
PS		 1366add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1367 unsigned int *num_iovec, __u8 *oplock)
d22cbfec
PS		 1368{
1369 struct smb2_create_req *req = iov[0].iov_base;
1370 unsigned int num = *num_iovec;
1371
a41a28bd 1372 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
d22cbfec
PS		 1373 if (iov[num].iov_base == NULL)
1374 return -ENOMEM;
a41a28bd 1375 iov[num].iov_len = server->vals->create_lease_size;
d22cbfec
PS		 1376 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1377 if (!req->CreateContextsOffset)
1378 req->CreateContextsOffset = cpu_to_le32(
1379 sizeof(struct smb2_create_req) - 4 +
1380 iov[num - 1].iov_len);
a41a28bd
PS		 1381 le32_add_cpu(&req->CreateContextsLength,
1382 server->vals->create_lease_size);
1383 inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
d22cbfec
PS		 1384 *num_iovec = num + 1;
1385 return 0;
1386}
1387
b56eae4d
SF		 1388static struct create_durable_v2 *
1389create_durable_v2_buf(struct cifs_fid *pfid)
1390{
1391 struct create_durable_v2 *buf;
1392
1393 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
1394 if (!buf)
1395 return NULL;
1396
1397 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1398 (struct create_durable_v2, dcontext));
1399 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
1400 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1401 (struct create_durable_v2, Name));
1402 buf->ccontext.NameLength = cpu_to_le16(4);
1403
1404 buf->dcontext.Timeout = 0; /* Should this be configurable by workload */
1405 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
fa70b87c 1406 generate_random_uuid(buf->dcontext.CreateGuid);
b56eae4d
SF		 1407 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
1408
1409 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1410 buf->Name[0] = 'D';
1411 buf->Name[1] = 'H';
1412 buf->Name[2] = '2';
1413 buf->Name[3] = 'Q';
1414 return buf;
1415}
1416
1417static struct create_durable_handle_reconnect_v2 *
1418create_reconnect_durable_v2_buf(struct cifs_fid *fid)
1419{
1420 struct create_durable_handle_reconnect_v2 *buf;
1421
1422 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
1423 GFP_KERNEL);
1424 if (!buf)
1425 return NULL;
1426
1427 buf->ccontext.DataOffset =
1428 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1429 dcontext));
1430 buf->ccontext.DataLength =
1431 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
1432 buf->ccontext.NameOffset =
1433 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1434 Name));
1435 buf->ccontext.NameLength = cpu_to_le16(4);
1436
1437 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
1438 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
1439 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1440 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
1441
1442 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1443 buf->Name[0] = 'D';
1444 buf->Name[1] = 'H';
1445 buf->Name[2] = '2';
1446 buf->Name[3] = 'C';
1447 return buf;
1448}
1449
63eb3def 1450static int
b56eae4d
SF		 1451add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
1452 struct cifs_open_parms *oparms)
1453{
1454 struct smb2_create_req *req = iov[0].iov_base;
1455 unsigned int num = *num_iovec;
1456
1457 iov[num].iov_base = create_durable_v2_buf(oparms->fid);
1458 if (iov[num].iov_base == NULL)
1459 return -ENOMEM;
1460 iov[num].iov_len = sizeof(struct create_durable_v2);
1461 if (!req->CreateContextsOffset)
1462 req->CreateContextsOffset =
1463 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1464 iov[1].iov_len);
1465 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
1466 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable_v2));
1467 *num_iovec = num + 1;
1468 return 0;
1469}
1470
1471static int
1472add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
9cbc0b73 1473 struct cifs_open_parms *oparms)
63eb3def
PS		 1474{
1475 struct smb2_create_req *req = iov[0].iov_base;
1476 unsigned int num = *num_iovec;
1477
b56eae4d
SF		 1478 /* indicate that we don't need to relock the file */
1479 oparms->reconnect = false;
1480
1481 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
1482 if (iov[num].iov_base == NULL)
1483 return -ENOMEM;
1484 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
1485 if (!req->CreateContextsOffset)
1486 req->CreateContextsOffset =
1487 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1488 iov[1].iov_len);
1489 le32_add_cpu(&req->CreateContextsLength,
1490 sizeof(struct create_durable_handle_reconnect_v2));
1491 inc_rfc1001_len(&req->hdr,
1492 sizeof(struct create_durable_handle_reconnect_v2));
1493 *num_iovec = num + 1;
1494 return 0;
1495}
1496
1497static int
1498add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1499 struct cifs_open_parms *oparms, bool use_persistent)
1500{
1501 struct smb2_create_req *req = iov[0].iov_base;
1502 unsigned int num = *num_iovec;
1503
1504 if (use_persistent) {
1505 if (oparms->reconnect)
1506 return add_durable_reconnect_v2_context(iov, num_iovec,
1507 oparms);
1508 else
1509 return add_durable_v2_context(iov, num_iovec, oparms);
1510 }
1511
9cbc0b73
PS		 1512 if (oparms->reconnect) {
1513 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1514 /* indicate that we don't need to relock the file */
1515 oparms->reconnect = false;
1516 } else
1517 iov[num].iov_base = create_durable_buf();
63eb3def
PS		 1518 if (iov[num].iov_base == NULL)
1519 return -ENOMEM;
1520 iov[num].iov_len = sizeof(struct create_durable);
1521 if (!req->CreateContextsOffset)
1522 req->CreateContextsOffset =
1523 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1524 iov[1].iov_len);
31f92e9a 1525 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
63eb3def
PS		 1526 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
1527 *num_iovec = num + 1;
1528 return 0;
1529}
1530
2503a0db 1531int
064f6047 1532SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
b42bf888
PS		 1533 __u8 *oplock, struct smb2_file_all_info *buf,
1534 struct smb2_err_rsp **err_buf)
2503a0db
PS		 1535{
1536 struct smb2_create_req *req;
1537 struct smb2_create_rsp *rsp;
1538 struct TCP_Server_Info *server;
064f6047 1539 struct cifs_tcon *tcon = oparms->tcon;
2503a0db 1540 struct cifs_ses *ses = tcon->ses;
63eb3def 1541 struct kvec iov[4];
da502f7d 1542 struct kvec rsp_iov;
2503a0db
PS		 1543 int resp_buftype;
1544 int uni_path_len;
b8c32dbb
PS		 1545 __le16 *copy_path = NULL;
1546 int copy_size;
2503a0db 1547 int rc = 0;
da502f7d 1548 unsigned int n_iov = 2;
ca81983f 1549 __u32 file_attributes = 0;
663a9621 1550 char *dhc_buf = NULL, *lc_buf = NULL;
7fb8986e 1551 int flags = 0;
2503a0db 1552
f96637be 1553 cifs_dbg(FYI, "create/open\n");
2503a0db
PS		 1554
1555 if (ses && (ses->server))
1556 server = ses->server;
1557 else
1558 return -EIO;
1559
1560 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
1561 if (rc)
1562 return rc;
1563
7fb8986e
PS		 1564 if (encryption_required(tcon))
1565 flags |= CIFS_TRANSFORM_REQ;
1566
064f6047 1567 if (oparms->create_options & CREATE_OPTION_READONLY)
ca81983f 1568 file_attributes |= ATTR_READONLY;
db8b631d
SF		 1569 if (oparms->create_options & CREATE_OPTION_SPECIAL)
1570 file_attributes |= ATTR_SYSTEM;
ca81983f 1571
2503a0db 1572 req->ImpersonationLevel = IL_IMPERSONATION;
064f6047 1573 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
2503a0db
PS		 1574 /* File attributes ignored on open (used in create though) */
1575 req->FileAttributes = cpu_to_le32(file_attributes);
1576 req->ShareAccess = FILE_SHARE_ALL_LE;
064f6047
PS		 1577 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1578 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
2503a0db 1579 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
59aa3718
PS		 1580 /* do not count rfc1001 len field */
1581 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
2503a0db
PS		 1582
1583 iov[0].iov_base = (char *)req;
1584 /* 4 for rfc1002 length field */
1585 iov[0].iov_len = get_rfc1002_length(req) + 4;
1586
1587 /* MUST set path len (NameLength) to 0 opening root of share */
59aa3718
PS		 1588 req->NameLength = cpu_to_le16(uni_path_len - 2);
1589 /* -1 since last byte is buf[0] which is sent below (path) */
1590 iov[0].iov_len--;
1591 if (uni_path_len % 8 != 0) {
1592 copy_size = uni_path_len / 8 * 8;
1593 if (copy_size < uni_path_len)
1594 copy_size += 8;
1595
1596 copy_path = kzalloc(copy_size, GFP_KERNEL);
1597 if (!copy_path)
1598 return -ENOMEM;
1599 memcpy((char *)copy_path, (const char *)path,
1600 uni_path_len);
1601 uni_path_len = copy_size;
1602 path = copy_path;
2503a0db
PS		 1603 }
1604
59aa3718
PS		 1605 iov[1].iov_len = uni_path_len;
1606 iov[1].iov_base = path;
1607 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1608 inc_rfc1001_len(req, uni_path_len - 1);
1609
b8c32dbb
PS		 1610 if (!server->oplocks)
1611 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1612
a41a28bd 1613 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
b8c32dbb
PS		 1614 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1615 req->RequestedOplockLevel = *oplock;
1616 else {
da502f7d 1617 rc = add_lease_context(server, iov, &n_iov, oplock);
d22cbfec 1618 if (rc) {
b8c32dbb
PS		 1619 cifs_small_buf_release(req);
1620 kfree(copy_path);
d22cbfec 1621 return rc;
b8c32dbb 1622 }
da502f7d 1623 lc_buf = iov[n_iov-1].iov_base;
b8c32dbb
PS		 1624 }
1625
63eb3def
PS		 1626 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1627 /* need to set Next field of lease context if we request it */
a41a28bd 1628 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
63eb3def 1629 struct create_context *ccontext =
da502f7d 1630 (struct create_context *)iov[n_iov-1].iov_base;
1c46943f 1631 ccontext->Next =
a41a28bd 1632 cpu_to_le32(server->vals->create_lease_size);
63eb3def 1633 }
b56eae4d 1634
da502f7d 1635 rc = add_durable_context(iov, &n_iov, oparms,
b56eae4d 1636 tcon->use_persistent);
63eb3def
PS		 1637 if (rc) {
1638 cifs_small_buf_release(req);
1639 kfree(copy_path);
663a9621 1640 kfree(lc_buf);
63eb3def
PS		 1641 return rc;
1642 }
da502f7d 1643 dhc_buf = iov[n_iov-1].iov_base;
63eb3def
PS		 1644 }
1645
7fb8986e 1646 rc = SendReceive2(xid, ses, iov, n_iov, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1647 cifs_small_buf_release(req);
1648 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2503a0db
PS		 1649
1650 if (rc != 0) {
1651 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
b42bf888
PS		 1652 if (err_buf)
1653 *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
1654 GFP_KERNEL);
2503a0db
PS		 1655 goto creat_exit;
1656 }
1657
064f6047
PS		 1658 oparms->fid->persistent_fid = rsp->PersistentFileId;
1659 oparms->fid->volatile_fid = rsp->VolatileFileId;
f0df737e
PS		 1660
1661 if (buf) {
1662 memcpy(buf, &rsp->CreationTime, 32);
1663 buf->AllocationSize = rsp->AllocationSize;
1664 buf->EndOfFile = rsp->EndofFile;
1665 buf->Attributes = rsp->FileAttributes;
1666 buf->NumberOfLinks = cpu_to_le32(1);
1667 buf->DeletePending = 0;
1668 }
2e44b288 1669
b8c32dbb 1670 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
42873b0a 1671 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
b8c32dbb
PS		 1672 else
1673 *oplock = rsp->OplockLevel;
2503a0db 1674creat_exit:
b8c32dbb 1675 kfree(copy_path);
663a9621
PS		 1676 kfree(lc_buf);
1677 kfree(dhc_buf);
2503a0db
PS		 1678 free_rsp_buf(resp_buftype, rsp);
1679 return rc;
1680}
1681
4a72dafa
SF		 1682/*
1683 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1684 */
1685int
1686SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
51146625
AA		 1687 u64 volatile_fid, u32 opcode, bool is_fsctl, bool use_ipc,
1688 char *in_data, u32 indatalen,
1689 char **out_data, u32 *plen /* returned data len */)
4a72dafa
SF		 1690{
1691 struct smb2_ioctl_req *req;
1692 struct smb2_ioctl_rsp *rsp;
31473fc4 1693 struct smb2_sync_hdr *shdr;
4a72dafa 1694 struct TCP_Server_Info *server;
8e353106 1695 struct cifs_ses *ses;
4a72dafa 1696 struct kvec iov[2];
da502f7d 1697 struct kvec rsp_iov;
4a72dafa 1698 int resp_buftype;
da502f7d 1699 int n_iov;
4a72dafa 1700 int rc = 0;
7fb8986e 1701 int flags = 0;
4a72dafa
SF		 1702
1703 cifs_dbg(FYI, "SMB2 IOCTL\n");
1704
3d1a3745
SF		 1705 if (out_data != NULL)
1706 *out_data = NULL;
1707
4a72dafa
SF		 1708 /* zero out returned data len, in case of error */
1709 if (plen)
1710 *plen = 0;
1711
8e353106
SF		 1712 if (tcon)
1713 ses = tcon->ses;
1714 else
1715 return -EIO;
1716
4a72dafa
SF		 1717 if (ses && (ses->server))
1718 server = ses->server;
1719 else
1720 return -EIO;
1721
1722 rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req);
1723 if (rc)
1724 return rc;
1725
51146625
AA		 1726 if (use_ipc) {
1727 if (ses->ipc_tid == 0) {
1728 cifs_small_buf_release(req);
1729 return -ENOTCONN;
1730 }
1731
1732 cifs_dbg(FYI, "replacing tid 0x%x with IPC tid 0x%x\n",
1733 req->hdr.sync_hdr.TreeId, ses->ipc_tid);
1734 req->hdr.sync_hdr.TreeId = ses->ipc_tid;
1735 }
7fb8986e
PS		 1736 if (encryption_required(tcon))
1737 flags |= CIFS_TRANSFORM_REQ;
1738
4a72dafa
SF		 1739 req->CtlCode = cpu_to_le32(opcode);
1740 req->PersistentFileId = persistent_fid;
1741 req->VolatileFileId = volatile_fid;
1742
1743 if (indatalen) {
1744 req->InputCount = cpu_to_le32(indatalen);
1745 /* do not set InputOffset if no input data */
1746 req->InputOffset =
1747 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4);
1748 iov[1].iov_base = in_data;
1749 iov[1].iov_len = indatalen;
da502f7d 1750 n_iov = 2;
4a72dafa 1751 } else
da502f7d 1752 n_iov = 1;
4a72dafa
SF		 1753
1754 req->OutputOffset = 0;
1755 req->OutputCount = 0; /* MBZ */
1756
1757 /*
1758 * Could increase MaxOutputResponse, but that would require more
1759 * than one credit. Windows typically sets this smaller, but for some
1760 * ioctls it may be useful to allow server to send more. No point
1761 * limiting what the server can send as long as fits in one credit
1762 */
1763 req->MaxOutputResponse = cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1764
1765 if (is_fsctl)
1766 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
1767 else
1768 req->Flags = 0;
1769
1770 iov[0].iov_base = (char *)req;
4a72dafa 1771
7ff8d45c
SF		 1772 /*
1773 * If no input data, the size of ioctl struct in
1774 * protocol spec still includes a 1 byte data buffer,
1775 * but if input data passed to ioctl, we do not
1776 * want to double count this, so we do not send
1777 * the dummy one byte of data in iovec[0] if sending
1778 * input data (in iovec[1]). We also must add 4 bytes
1779 * in first iovec to allow for rfc1002 length field.
1780 */
1781
1782 if (indatalen) {
1783 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1784 inc_rfc1001_len(req, indatalen - 1);
1785 } else
1786 iov[0].iov_len = get_rfc1002_length(req) + 4;
1787
4a72dafa 1788
7fb8986e 1789 rc = SendReceive2(xid, ses, iov, n_iov, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1790 cifs_small_buf_release(req);
1791 rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
4a72dafa 1792
9bf0c9cd 1793 if ((rc != 0) && (rc != -EINVAL)) {
8e353106 1794 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
4a72dafa 1795 goto ioctl_exit;
9bf0c9cd
SF		 1796 } else if (rc == -EINVAL) {
1797 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
1798 (opcode != FSCTL_SRV_COPYCHUNK)) {
8e353106 1799 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
9bf0c9cd
SF		 1800 goto ioctl_exit;
1801 }
4a72dafa
SF		 1802 }
1803
1804 /* check if caller wants to look at return data or just return rc */
1805 if ((plen == NULL) || (out_data == NULL))
1806 goto ioctl_exit;
1807
1808 *plen = le32_to_cpu(rsp->OutputCount);
1809
1810 /* We check for obvious errors in the output buffer length and offset */
1811 if (*plen == 0)
1812 goto ioctl_exit; /* server returned no data */
1813 else if (*plen > 0xFF00) {
1814 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
1815 *plen = 0;
1816 rc = -EIO;
1817 goto ioctl_exit;
1818 }
1819
1820 if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
1821 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
1822 le32_to_cpu(rsp->OutputOffset));
1823 *plen = 0;
1824 rc = -EIO;
1825 goto ioctl_exit;
1826 }
1827
1828 *out_data = kmalloc(*plen, GFP_KERNEL);
1829 if (*out_data == NULL) {
1830 rc = -ENOMEM;
1831 goto ioctl_exit;
1832 }
1833
31473fc4
PS		 1834 shdr = get_sync_hdr(rsp);
1835 memcpy(*out_data, (char *)shdr + le32_to_cpu(rsp->OutputOffset), *plen);
4a72dafa
SF		 1836ioctl_exit:
1837 free_rsp_buf(resp_buftype, rsp);
1838 return rc;
1839}
1840
64a5cfa6
SF		 1841/*
1842 * Individual callers to ioctl worker function follow
1843 */
1844
1845int
1846SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1847 u64 persistent_fid, u64 volatile_fid)
1848{
1849 int rc;
64a5cfa6
SF		 1850 struct compress_ioctl fsctl_input;
1851 char *ret_data = NULL;
1852
1853 fsctl_input.CompressionState =
bc09d141 1854 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
64a5cfa6
SF		 1855
1856 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1857 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
51146625 1858 false /* use_ipc */,
64a5cfa6
SF		 1859 (char *)&fsctl_input /* data input */,
1860 2 /* in data len */, &ret_data /* out data */, NULL);
1861
1862 cifs_dbg(FYI, "set compression rc %d\n", rc);
64a5cfa6
SF		 1863
1864 return rc;
1865}
1866
2503a0db
PS		 1867int
1868SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1869 u64 persistent_fid, u64 volatile_fid)
1870{
1871 struct smb2_close_req *req;
1872 struct smb2_close_rsp *rsp;
1873 struct TCP_Server_Info *server;
1874 struct cifs_ses *ses = tcon->ses;
1875 struct kvec iov[1];
da502f7d 1876 struct kvec rsp_iov;
2503a0db
PS		 1877 int resp_buftype;
1878 int rc = 0;
7fb8986e 1879 int flags = 0;
2503a0db 1880
f96637be 1881 cifs_dbg(FYI, "Close\n");
2503a0db
PS		 1882
1883 if (ses && (ses->server))
1884 server = ses->server;
1885 else
1886 return -EIO;
1887
1888 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1889 if (rc)
1890 return rc;
1891
7fb8986e
PS		 1892 if (encryption_required(tcon))
1893 flags |= CIFS_TRANSFORM_REQ;
1894
2503a0db
PS		 1895 req->PersistentFileId = persistent_fid;
1896 req->VolatileFileId = volatile_fid;
1897
1898 iov[0].iov_base = (char *)req;
1899 /* 4 for rfc1002 length field */
1900 iov[0].iov_len = get_rfc1002_length(req) + 4;
1901
7fb8986e 1902 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 1903 cifs_small_buf_release(req);
1904 rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
2503a0db
PS		 1905
1906 if (rc != 0) {
d4a029d2 1907 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
2503a0db
PS		 1908 goto close_exit;
1909 }
1910
2503a0db
PS		 1911 /* BB FIXME - decode close response, update inode for caching */
1912
1913close_exit:
1914 free_rsp_buf(resp_buftype, rsp);
1915 return rc;
1916}
be4cb9e3
PS		 1917
1918static int
1919validate_buf(unsigned int offset, unsigned int buffer_length,
1920 struct smb2_hdr *hdr, unsigned int min_buf_size)
1921
1922{
1923 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
1924 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
1925 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1926 char *end_of_buf = begin_of_buf + buffer_length;
1927
1928
1929 if (buffer_length < min_buf_size) {
f96637be
JP		 1930 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
1931 buffer_length, min_buf_size);
be4cb9e3
PS		 1932 return -EINVAL;
1933 }
1934
1935 /* check if beyond RFC1001 maximum length */
1936 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
f96637be
JP		 1937 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
1938 buffer_length, smb_len);
be4cb9e3
PS		 1939 return -EINVAL;
1940 }
1941
1942 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
f96637be 1943 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
be4cb9e3
PS		 1944 return -EINVAL;
1945 }
1946
1947 return 0;
1948}
1949
1950/*
1951 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1952 * Caller must free buffer.
1953 */
1954static int
1955validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
1956 struct smb2_hdr *hdr, unsigned int minbufsize,
1957 char *data)
1958
1959{
1960 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1961 int rc;
1962
1963 if (!data)
1964 return -EINVAL;
1965
1966 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
1967 if (rc)
1968 return rc;
1969
1970 memcpy(data, begin_of_buf, buffer_length);
1971
1972 return 0;
1973}
1974
f0df737e
PS		 1975static int
1976query_info(const unsigned int xid, struct cifs_tcon *tcon,
1977 u64 persistent_fid, u64 volatile_fid, u8 info_class,
1978 size_t output_len, size_t min_len, void *data)
be4cb9e3
PS		 1979{
1980 struct smb2_query_info_req *req;
1981 struct smb2_query_info_rsp *rsp = NULL;
1982 struct kvec iov[2];
da502f7d 1983 struct kvec rsp_iov;
be4cb9e3
PS		 1984 int rc = 0;
1985 int resp_buftype;
1986 struct TCP_Server_Info *server;
1987 struct cifs_ses *ses = tcon->ses;
7fb8986e 1988 int flags = 0;
be4cb9e3 1989
f96637be 1990 cifs_dbg(FYI, "Query Info\n");
be4cb9e3
PS		 1991
1992 if (ses && (ses->server))
1993 server = ses->server;
1994 else
1995 return -EIO;
1996
1997 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
1998 if (rc)
1999 return rc;
2000
7fb8986e
PS		 2001 if (encryption_required(tcon))
2002 flags |= CIFS_TRANSFORM_REQ;
2003
be4cb9e3 2004 req->InfoType = SMB2_O_INFO_FILE;
f0df737e 2005 req->FileInfoClass = info_class;
be4cb9e3
PS		 2006 req->PersistentFileId = persistent_fid;
2007 req->VolatileFileId = volatile_fid;
2008 /* 4 for rfc1002 length field and 1 for Buffer */
2009 req->InputBufferOffset =
2010 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
f0df737e 2011 req->OutputBufferLength = cpu_to_le32(output_len);
be4cb9e3
PS		 2012
2013 iov[0].iov_base = (char *)req;
2014 /* 4 for rfc1002 length field */
2015 iov[0].iov_len = get_rfc1002_length(req) + 4;
2016
7fb8986e 2017 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2018 cifs_small_buf_release(req);
2019 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
e5d04887 2020
be4cb9e3
PS		 2021 if (rc) {
2022 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2023 goto qinf_exit;
2024 }
2025
be4cb9e3
PS		 2026 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
2027 le32_to_cpu(rsp->OutputBufferLength),
f0df737e 2028 &rsp->hdr, min_len, data);
be4cb9e3
PS		 2029
2030qinf_exit:
2031 free_rsp_buf(resp_buftype, rsp);
2032 return rc;
2033}
9094fad1 2034
f0df737e
PS		 2035int
2036SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
2037 u64 persistent_fid, u64 volatile_fid,
2038 struct smb2_file_all_info *data)
2039{
2040 return query_info(xid, tcon, persistent_fid, volatile_fid,
2041 FILE_ALL_INFORMATION,
1bbe4997 2042 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
f0df737e
PS		 2043 sizeof(struct smb2_file_all_info), data);
2044}
2045
2046int
2047SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
2048 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
2049{
2050 return query_info(xid, tcon, persistent_fid, volatile_fid,
2051 FILE_INTERNAL_INFORMATION,
2052 sizeof(struct smb2_file_internal_info),
2053 sizeof(struct smb2_file_internal_info), uniqueid);
2054}
2055
9094fad1
PS		 2056/*
2057 * This is a no-op for now. We're not really interested in the reply, but
2058 * rather in the fact that the server sent one and that server->lstrp
2059 * gets updated.
2060 *
2061 * FIXME: maybe we should consider checking that the reply matches request?
2062 */
2063static void
2064smb2_echo_callback(struct mid_q_entry *mid)
2065{
2066 struct TCP_Server_Info *server = mid->callback_data;
31473fc4 2067 struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
9094fad1
PS		 2068 unsigned int credits_received = 1;
2069
2070 if (mid->mid_state == MID_RESPONSE_RECEIVED)
31473fc4 2071 credits_received = le16_to_cpu(rsp->hdr.sync_hdr.CreditRequest);
9094fad1 2072
5fb4e288 2073 mutex_lock(&server->srv_mutex);
9094fad1 2074 DeleteMidQEntry(mid);
5fb4e288 2075 mutex_unlock(&server->srv_mutex);
9094fad1
PS		 2076 add_credits(server, credits_received, CIFS_ECHO_OP);
2077}
2078
53e0e11e
PS		 2079void smb2_reconnect_server(struct work_struct *work)
2080{
2081 struct TCP_Server_Info *server = container_of(work,
2082 struct TCP_Server_Info, reconnect.work);
2083 struct cifs_ses *ses;
2084 struct cifs_tcon *tcon, *tcon2;
2085 struct list_head tmp_list;
2086 int tcon_exist = false;
2087
2088 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2089 mutex_lock(&server->reconnect_mutex);
2090
2091 INIT_LIST_HEAD(&tmp_list);
2092 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
2093
2094 spin_lock(&cifs_tcp_ses_lock);
2095 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2096 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
96a988ff 2097 if (tcon->need_reconnect || tcon->need_reopen_files) {
53e0e11e
PS		 2098 tcon->tc_count++;
2099 list_add_tail(&tcon->rlist, &tmp_list);
2100 tcon_exist = true;
2101 }
2102 }
2103 }
2104 /*
2105 * Get the reference to server struct to be sure that the last call of
2106 * cifs_put_tcon() in the loop below won't release the server pointer.
2107 */
2108 if (tcon_exist)
2109 server->srv_count++;
2110
2111 spin_unlock(&cifs_tcp_ses_lock);
2112
2113 list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
96a988ff
PS		 2114 if (!smb2_reconnect(SMB2_INTERNAL_CMD, tcon))
2115 cifs_reopen_persistent_handles(tcon);
53e0e11e
PS		 2116 list_del_init(&tcon->rlist);
2117 cifs_put_tcon(tcon);
2118 }
2119
2120 cifs_dbg(FYI, "Reconnecting tcons finished\n");
2121 mutex_unlock(&server->reconnect_mutex);
2122
2123 /* now we can safely release srv struct */
2124 if (tcon_exist)
2125 cifs_put_tcp_session(server, 1);
2126}
2127
9094fad1
PS		 2128int
2129SMB2_echo(struct TCP_Server_Info *server)
2130{
2131 struct smb2_echo_req *req;
2132 int rc = 0;
738f9de5
PS		 2133 struct kvec iov[2];
2134 struct smb_rqst rqst = { .rq_iov = iov,
2135 .rq_nvec = 2 };
9094fad1 2136
f96637be 2137 cifs_dbg(FYI, "In echo request\n");
9094fad1 2138
4fcd1813 2139 if (server->tcpStatus == CifsNeedNegotiate) {
53e0e11e
PS		 2140 /* No need to send echo on newly established connections */
2141 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
2142 return rc;
4fcd1813
SF		 2143 }
2144
9094fad1
PS		 2145 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
2146 if (rc)
2147 return rc;
2148
31473fc4 2149 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
9094fad1 2150
9094fad1 2151 /* 4 for rfc1002 length field */
738f9de5
PS		 2152 iov[0].iov_len = 4;
2153 iov[0].iov_base = (char *)req;
2154 iov[1].iov_len = get_rfc1002_length(req);
2155 iov[1].iov_base = (char *)req + 4;
9094fad1 2156
9b7c18a2
PS		 2157 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
2158 server, CIFS_ECHO_OP);
9094fad1 2159 if (rc)
f96637be 2160 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
9094fad1
PS		 2161
2162 cifs_small_buf_release(req);
2163 return rc;
2164}
7a5cfb19
PS		 2165
2166int
2167SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2168 u64 volatile_fid)
2169{
2170 struct smb2_flush_req *req;
2171 struct TCP_Server_Info *server;
2172 struct cifs_ses *ses = tcon->ses;
2173 struct kvec iov[1];
da502f7d 2174 struct kvec rsp_iov;
7a5cfb19
PS		 2175 int resp_buftype;
2176 int rc = 0;
7fb8986e 2177 int flags = 0;
7a5cfb19 2178
f96637be 2179 cifs_dbg(FYI, "Flush\n");
7a5cfb19
PS		 2180
2181 if (ses && (ses->server))
2182 server = ses->server;
2183 else
2184 return -EIO;
2185
2186 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
2187 if (rc)
2188 return rc;
2189
7fb8986e
PS		 2190 if (encryption_required(tcon))
2191 flags |= CIFS_TRANSFORM_REQ;
2192
7a5cfb19
PS		 2193 req->PersistentFileId = persistent_fid;
2194 req->VolatileFileId = volatile_fid;
2195
2196 iov[0].iov_base = (char *)req;
2197 /* 4 for rfc1002 length field */
2198 iov[0].iov_len = get_rfc1002_length(req) + 4;
2199
7fb8986e 2200 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d 2201 cifs_small_buf_release(req);
7a5cfb19 2202
dfebe400 2203 if (rc != 0)
7a5cfb19
PS		 2204 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
2205
da502f7d 2206 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
7a5cfb19
PS		 2207 return rc;
2208}
09a4707e
PS		 2209
2210/*
2211 * To form a chain of read requests, any read requests after the first should
2212 * have the end_of_chain boolean set to true.
2213 */
2214static int
738f9de5
PS		 2215smb2_new_read_req(void **buf, unsigned int *total_len,
2216 struct cifs_io_parms *io_parms, unsigned int remaining_bytes,
2217 int request_type)
09a4707e
PS		 2218{
2219 int rc = -EACCES;
b8f57ee8 2220 struct smb2_read_plain_req *req = NULL;
31473fc4 2221 struct smb2_sync_hdr *shdr;
09a4707e 2222
b8f57ee8
PS		 2223 rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
2224 total_len);
09a4707e
PS		 2225 if (rc)
2226 return rc;
2227 if (io_parms->tcon->ses->server == NULL)
2228 return -ECONNABORTED;
2229
b8f57ee8 2230 shdr = &req->sync_hdr;
31473fc4 2231 shdr->ProcessId = cpu_to_le32(io_parms->pid);
09a4707e
PS		 2232
2233 req->PersistentFileId = io_parms->persistent_fid;
2234 req->VolatileFileId = io_parms->volatile_fid;
2235 req->ReadChannelInfoOffset = 0; /* reserved */
2236 req->ReadChannelInfoLength = 0; /* reserved */
2237 req->Channel = 0; /* reserved */
2238 req->MinimumCount = 0;
2239 req->Length = cpu_to_le32(io_parms->length);
2240 req->Offset = cpu_to_le64(io_parms->offset);
2241
2242 if (request_type & CHAINED_REQUEST) {
2243 if (!(request_type & END_OF_CHAIN)) {
b8f57ee8
PS		 2244 /* next 8-byte aligned request */
2245 *total_len = DIV_ROUND_UP(*total_len, 8) * 8;
2246 shdr->NextCommand = cpu_to_le32(*total_len);
09a4707e 2247 } else /* END_OF_CHAIN */
31473fc4 2248 shdr->NextCommand = 0;
09a4707e 2249 if (request_type & RELATED_REQUEST) {
31473fc4 2250 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
09a4707e
PS		 2251 /*
2252 * Related requests use info from previous read request
2253 * in chain.
2254 */
31473fc4
PS		 2255 shdr->SessionId = 0xFFFFFFFF;
2256 shdr->TreeId = 0xFFFFFFFF;
09a4707e
PS		 2257 req->PersistentFileId = 0xFFFFFFFF;
2258 req->VolatileFileId = 0xFFFFFFFF;
2259 }
2260 }
2261 if (remaining_bytes > io_parms->length)
2262 req->RemainingBytes = cpu_to_le32(remaining_bytes);
2263 else
2264 req->RemainingBytes = 0;
2265
738f9de5 2266 *buf = req;
09a4707e
PS		 2267 return rc;
2268}
2269
2270static void
2271smb2_readv_callback(struct mid_q_entry *mid)
2272{
2273 struct cifs_readdata *rdata = mid->callback_data;
2274 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
2275 struct TCP_Server_Info *server = tcon->ses->server;
738f9de5
PS		 2276 struct smb2_sync_hdr *shdr =
2277 (struct smb2_sync_hdr *)rdata->iov[1].iov_base;
09a4707e 2278 unsigned int credits_received = 1;
738f9de5
PS		 2279 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2280 .rq_nvec = 2,
8321fec4
JL		 2281 .rq_pages = rdata->pages,
2282 .rq_npages = rdata->nr_pages,
2283 .rq_pagesz = rdata->pagesz,
2284 .rq_tailsz = rdata->tailsz };
09a4707e 2285
f96637be
JP		 2286 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2287 __func__, mid->mid, mid->mid_state, rdata->result,
2288 rdata->bytes);
09a4707e
PS		 2289
2290 switch (mid->mid_state) {
2291 case MID_RESPONSE_RECEIVED:
31473fc4 2292 credits_received = le16_to_cpu(shdr->CreditRequest);
09a4707e 2293 /* result already set, check signature */
4326ed2f 2294 if (server->sign && !mid->decrypted) {
3c1bf7e4
PS		 2295 int rc;
2296
0b688cfc 2297 rc = smb2_verify_signature(&rqst, server);
3c1bf7e4 2298 if (rc)
f96637be
JP		 2299 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
2300 rc);
3c1bf7e4 2301 }
09a4707e 2302 /* FIXME: should this be counted toward the initiating task? */
34a54d61
PS		 2303 task_io_account_read(rdata->got_bytes);
2304 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 2305 break;
2306 case MID_REQUEST_SUBMITTED:
2307 case MID_RETRY_NEEDED:
2308 rdata->result = -EAGAIN;
d913ed17
PS		 2309 if (server->sign && rdata->got_bytes)
2310 /* reset bytes number since we can not check a sign */
2311 rdata->got_bytes = 0;
2312 /* FIXME: should this be counted toward the initiating task? */
2313 task_io_account_read(rdata->got_bytes);
2314 cifs_stats_bytes_read(tcon, rdata->got_bytes);
09a4707e
PS		 2315 break;
2316 default:
2317 if (rdata->result != -ENODATA)
2318 rdata->result = -EIO;
2319 }
2320
2321 if (rdata->result)
2322 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
2323
2324 queue_work(cifsiod_wq, &rdata->work);
5fb4e288 2325 mutex_lock(&server->srv_mutex);
09a4707e 2326 DeleteMidQEntry(mid);
5fb4e288 2327 mutex_unlock(&server->srv_mutex);
09a4707e
PS		 2328 add_credits(server, credits_received, 0);
2329}
2330
738f9de5 2331/* smb2_async_readv - send an async read, and set up mid to handle result */
09a4707e
PS		 2332int
2333smb2_async_readv(struct cifs_readdata *rdata)
2334{
bed9da02 2335 int rc, flags = 0;
31473fc4
PS		 2336 char *buf;
2337 struct smb2_sync_hdr *shdr;
09a4707e 2338 struct cifs_io_parms io_parms;
738f9de5
PS		 2339 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2340 .rq_nvec = 2 };
bed9da02 2341 struct TCP_Server_Info *server;
738f9de5 2342 unsigned int total_len;
b8f57ee8 2343 __be32 req_len;
09a4707e 2344
f96637be
JP		 2345 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
2346 __func__, rdata->offset, rdata->bytes);
09a4707e
PS		 2347
2348 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
2349 io_parms.offset = rdata->offset;
2350 io_parms.length = rdata->bytes;
2351 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
2352 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
2353 io_parms.pid = rdata->pid;
bed9da02
PS		 2354
2355 server = io_parms.tcon->ses->server;
2356
738f9de5 2357 rc = smb2_new_read_req((void **) &buf, &total_len, &io_parms, 0, 0);
bed9da02
PS		 2358 if (rc) {
2359 if (rc == -EAGAIN && rdata->credits) {
2360 /* credits was reset by reconnect */
2361 rdata->credits = 0;
2362 /* reduce in_flight value since we won't send the req */
2363 spin_lock(&server->req_lock);
2364 server->in_flight--;
2365 spin_unlock(&server->req_lock);
2366 }
09a4707e 2367 return rc;
bed9da02 2368 }
09a4707e 2369
7fb8986e
PS		 2370 if (encryption_required(io_parms.tcon))
2371 flags |= CIFS_TRANSFORM_REQ;
2372
b8f57ee8
PS		 2373 req_len = cpu_to_be32(total_len);
2374
2375 rdata->iov[0].iov_base = &req_len;
2376 rdata->iov[0].iov_len = sizeof(__be32);
2377 rdata->iov[1].iov_base = buf;
2378 rdata->iov[1].iov_len = total_len;
2379
2380 shdr = (struct smb2_sync_hdr *)buf;
09a4707e 2381
bed9da02 2382 if (rdata->credits) {
31473fc4 2383 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
bed9da02 2384 SMB2_MAX_BUFFER_SIZE));
31473fc4 2385 shdr->CreditRequest = shdr->CreditCharge;
bed9da02
PS		 2386 spin_lock(&server->req_lock);
2387 server->credits += rdata->credits -
31473fc4 2388 le16_to_cpu(shdr->CreditCharge);
bed9da02
PS		 2389 spin_unlock(&server->req_lock);
2390 wake_up(&server->request_q);
7fb8986e 2391 flags |= CIFS_HAS_CREDITS;
bed9da02
PS		 2392 }
2393
09a4707e 2394 kref_get(&rdata->refcount);
fec344e3 2395 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
09a4707e 2396 cifs_readv_receive, smb2_readv_callback,
4326ed2f 2397 smb3_handle_read_data, rdata, flags);
e5d04887 2398 if (rc) {
09a4707e 2399 kref_put(&rdata->refcount, cifs_readdata_release);
e5d04887
PS		 2400 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
2401 }
09a4707e
PS		 2402
2403 cifs_small_buf_release(buf);
2404 return rc;
2405}
33319141 2406
d8e05039
PS		 2407int
2408SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
2409 unsigned int *nbytes, char **buf, int *buf_type)
2410{
2411 int resp_buftype, rc = -EACCES;
b8f57ee8 2412 struct smb2_read_plain_req *req = NULL;
d8e05039 2413 struct smb2_read_rsp *rsp = NULL;
31473fc4 2414 struct smb2_sync_hdr *shdr;
b8f57ee8 2415 struct kvec iov[2];
da502f7d 2416 struct kvec rsp_iov;
738f9de5 2417 unsigned int total_len;
b8f57ee8
PS		 2418 __be32 req_len;
2419 struct smb_rqst rqst = { .rq_iov = iov,
2420 .rq_nvec = 2 };
7fb8986e
PS		 2421 int flags = CIFS_LOG_ERROR;
2422 struct cifs_ses *ses = io_parms->tcon->ses;
d8e05039
PS		 2423
2424 *nbytes = 0;
738f9de5 2425 rc = smb2_new_read_req((void **)&req, &total_len, io_parms, 0, 0);
d8e05039
PS		 2426 if (rc)
2427 return rc;
2428
7fb8986e
PS		 2429 if (encryption_required(io_parms->tcon))
2430 flags |= CIFS_TRANSFORM_REQ;
2431
b8f57ee8 2432 req_len = cpu_to_be32(total_len);
738f9de5 2433
b8f57ee8
PS		 2434 iov[0].iov_base = &req_len;
2435 iov[0].iov_len = sizeof(__be32);
2436 iov[1].iov_base = req;
2437 iov[1].iov_len = total_len;
2438
7fb8986e 2439 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
b8f57ee8 2440 cifs_small_buf_release(req);
d8e05039 2441
da502f7d 2442 rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
31473fc4 2443 shdr = get_sync_hdr(rsp);
d8e05039 2444
31473fc4 2445 if (shdr->Status == STATUS_END_OF_FILE) {
da502f7d 2446 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
d8e05039
PS		 2447 return 0;
2448 }
2449
2450 if (rc) {
2451 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
f96637be 2452 cifs_dbg(VFS, "Send error in read = %d\n", rc);
d8e05039
PS		 2453 } else {
2454 *nbytes = le32_to_cpu(rsp->DataLength);
2455 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
2456 (*nbytes > io_parms->length)) {
f96637be
JP		 2457 cifs_dbg(FYI, "bad length %d for count %d\n",
2458 *nbytes, io_parms->length);
d8e05039
PS		 2459 rc = -EIO;
2460 *nbytes = 0;
2461 }
2462 }
2463
2464 if (*buf) {
31473fc4 2465 memcpy(*buf, (char *)shdr + rsp->DataOffset, *nbytes);
da502f7d 2466 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
d8e05039 2467 } else if (resp_buftype != CIFS_NO_BUFFER) {
da502f7d 2468 *buf = rsp_iov.iov_base;
d8e05039
PS		 2469 if (resp_buftype == CIFS_SMALL_BUFFER)
2470 *buf_type = CIFS_SMALL_BUFFER;
2471 else if (resp_buftype == CIFS_LARGE_BUFFER)
2472 *buf_type = CIFS_LARGE_BUFFER;
2473 }
2474 return rc;
2475}
2476
33319141
PS		 2477/*
2478 * Check the mid_state and signature on received buffer (if any), and queue the
2479 * workqueue completion task.
2480 */
2481static void
2482smb2_writev_callback(struct mid_q_entry *mid)
2483{
2484 struct cifs_writedata *wdata = mid->callback_data;
2485 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
5fb4e288 2486 struct TCP_Server_Info *server = tcon->ses->server;
33319141
PS		 2487 unsigned int written;
2488 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
2489 unsigned int credits_received = 1;
2490
2491 switch (mid->mid_state) {
2492 case MID_RESPONSE_RECEIVED:
31473fc4 2493 credits_received = le16_to_cpu(rsp->hdr.sync_hdr.CreditRequest);
33319141
PS		 2494 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
2495 if (wdata->result != 0)
2496 break;
2497
2498 written = le32_to_cpu(rsp->DataLength);
2499 /*
2500 * Mask off high 16 bits when bytes written as returned
2501 * by the server is greater than bytes requested by the
2502 * client. OS/2 servers are known to set incorrect
2503 * CountHigh values.
2504 */
2505 if (written > wdata->bytes)
2506 written &= 0xFFFF;
2507
2508 if (written < wdata->bytes)
2509 wdata->result = -ENOSPC;
2510 else
2511 wdata->bytes = written;
2512 break;
2513 case MID_REQUEST_SUBMITTED:
2514 case MID_RETRY_NEEDED:
2515 wdata->result = -EAGAIN;
2516 break;
2517 default:
2518 wdata->result = -EIO;
2519 break;
2520 }
2521
2522 if (wdata->result)
2523 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2524
2525 queue_work(cifsiod_wq, &wdata->work);
5fb4e288 2526 mutex_lock(&server->srv_mutex);
33319141 2527 DeleteMidQEntry(mid);
5fb4e288 2528 mutex_unlock(&server->srv_mutex);
33319141
PS		 2529 add_credits(tcon->ses->server, credits_received, 0);
2530}
2531
2532/* smb2_async_writev - send an async write, and set up mid to handle result */
2533int
4a5c80d7
SF		 2534smb2_async_writev(struct cifs_writedata *wdata,
2535 void (*release)(struct kref *kref))
33319141 2536{
cb7e9eab 2537 int rc = -EACCES, flags = 0;
33319141 2538 struct smb2_write_req *req = NULL;
31473fc4 2539 struct smb2_sync_hdr *shdr;
33319141 2540 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
cb7e9eab 2541 struct TCP_Server_Info *server = tcon->ses->server;
738f9de5
PS		 2542 struct kvec iov[2];
2543 struct smb_rqst rqst = { };
33319141
PS		 2544
2545 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
cb7e9eab
PS		 2546 if (rc) {
2547 if (rc == -EAGAIN && wdata->credits) {
2548 /* credits was reset by reconnect */
2549 wdata->credits = 0;
2550 /* reduce in_flight value since we won't send the req */
2551 spin_lock(&server->req_lock);
2552 server->in_flight--;
2553 spin_unlock(&server->req_lock);
2554 }
33319141 2555 goto async_writev_out;
cb7e9eab 2556 }
33319141 2557
7fb8986e
PS		 2558 if (encryption_required(tcon))
2559 flags |= CIFS_TRANSFORM_REQ;
2560
31473fc4
PS		 2561 shdr = get_sync_hdr(req);
2562 shdr->ProcessId = cpu_to_le32(wdata->cfile->pid);
33319141
PS		 2563
2564 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
2565 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
2566 req->WriteChannelInfoOffset = 0;
2567 req->WriteChannelInfoLength = 0;
2568 req->Channel = 0;
2569 req->Offset = cpu_to_le64(wdata->offset);
2570 /* 4 for rfc1002 length field */
2571 req->DataOffset = cpu_to_le16(
2572 offsetof(struct smb2_write_req, Buffer) - 4);
2573 req->RemainingBytes = 0;
2574
2575 /* 4 for rfc1002 length field and 1 for Buffer */
738f9de5
PS		 2576 iov[0].iov_len = 4;
2577 iov[0].iov_base = req;
2578 iov[1].iov_len = get_rfc1002_length(req) - 1;
2579 iov[1].iov_base = (char *)req + 4;
33319141 2580
738f9de5
PS		 2581 rqst.rq_iov = iov;
2582 rqst.rq_nvec = 2;
eddb079d
JL		 2583 rqst.rq_pages = wdata->pages;
2584 rqst.rq_npages = wdata->nr_pages;
2585 rqst.rq_pagesz = wdata->pagesz;
2586 rqst.rq_tailsz = wdata->tailsz;
33319141 2587
f96637be
JP		 2588 cifs_dbg(FYI, "async write at %llu %u bytes\n",
2589 wdata->offset, wdata->bytes);
33319141
PS		 2590
2591 req->Length = cpu_to_le32(wdata->bytes);
2592
2593 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
2594
cb7e9eab 2595 if (wdata->credits) {
31473fc4 2596 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
cb7e9eab 2597 SMB2_MAX_BUFFER_SIZE));
31473fc4 2598 shdr->CreditRequest = shdr->CreditCharge;
cb7e9eab
PS		 2599 spin_lock(&server->req_lock);
2600 server->credits += wdata->credits -
31473fc4 2601 le16_to_cpu(shdr->CreditCharge);
cb7e9eab
PS		 2602 spin_unlock(&server->req_lock);
2603 wake_up(&server->request_q);
7fb8986e 2604 flags |= CIFS_HAS_CREDITS;
cb7e9eab
PS		 2605 }
2606
33319141 2607 kref_get(&wdata->refcount);
9b7c18a2
PS		 2608 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
2609 wdata, flags);
33319141 2610
e5d04887 2611 if (rc) {
4a5c80d7 2612 kref_put(&wdata->refcount, release);
e5d04887
PS		 2613 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2614 }
33319141 2615
33319141
PS		 2616async_writev_out:
2617 cifs_small_buf_release(req);
33319141
PS		 2618 return rc;
2619}
009d3443
PS		 2620
2621/*
2622 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2623 * The length field from io_parms must be at least 1 and indicates a number of
2624 * elements with data to write that begins with position 1 in iov array. All
2625 * data length is specified by count.
2626 */
2627int
2628SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
2629 unsigned int *nbytes, struct kvec *iov, int n_vec)
2630{
2631 int rc = 0;
2632 struct smb2_write_req *req = NULL;
2633 struct smb2_write_rsp *rsp = NULL;
2634 int resp_buftype;
da502f7d 2635 struct kvec rsp_iov;
7fb8986e 2636 int flags = 0;
da502f7d 2637
009d3443
PS		 2638 *nbytes = 0;
2639
2640 if (n_vec < 1)
2641 return rc;
2642
2643 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
2644 if (rc)
2645 return rc;
2646
2647 if (io_parms->tcon->ses->server == NULL)
2648 return -ECONNABORTED;
2649
7fb8986e
PS		 2650 if (encryption_required(io_parms->tcon))
2651 flags |= CIFS_TRANSFORM_REQ;
2652
31473fc4 2653 req->hdr.sync_hdr.ProcessId = cpu_to_le32(io_parms->pid);
009d3443
PS		 2654
2655 req->PersistentFileId = io_parms->persistent_fid;
2656 req->VolatileFileId = io_parms->volatile_fid;
2657 req->WriteChannelInfoOffset = 0;
2658 req->WriteChannelInfoLength = 0;
2659 req->Channel = 0;
2660 req->Length = cpu_to_le32(io_parms->length);
2661 req->Offset = cpu_to_le64(io_parms->offset);
2662 /* 4 for rfc1002 length field */
2663 req->DataOffset = cpu_to_le16(
2664 offsetof(struct smb2_write_req, Buffer) - 4);
2665 req->RemainingBytes = 0;
2666
2667 iov[0].iov_base = (char *)req;
2668 /* 4 for rfc1002 length field and 1 for Buffer */
2669 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2670
2671 /* length of entire message including data to be written */
2672 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
2673
2674 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
7fb8986e 2675 &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2676 cifs_small_buf_release(req);
2677 rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
009d3443
PS		 2678
2679 if (rc) {
2680 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
f96637be 2681 cifs_dbg(VFS, "Send error in write = %d\n", rc);
e5d04887 2682 } else
009d3443 2683 *nbytes = le32_to_cpu(rsp->DataLength);
e5d04887
PS		 2684
2685 free_rsp_buf(resp_buftype, rsp);
009d3443
PS		 2686 return rc;
2687}
35143eb5 2688
d324f08d
PS		 2689static unsigned int
2690num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
2691{
2692 int len;
2693 unsigned int entrycount = 0;
2694 unsigned int next_offset = 0;
2695 FILE_DIRECTORY_INFO *entryptr;
2696
2697 if (bufstart == NULL)
2698 return 0;
2699
2700 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
2701
2702 while (1) {
2703 entryptr = (FILE_DIRECTORY_INFO *)
2704 ((char *)entryptr + next_offset);
2705
2706 if ((char *)entryptr + size > end_of_buf) {
f96637be 2707 cifs_dbg(VFS, "malformed search entry would overflow\n");
d324f08d
PS		 2708 break;
2709 }
2710
2711 len = le32_to_cpu(entryptr->FileNameLength);
2712 if ((char *)entryptr + len + size > end_of_buf) {
f96637be
JP		 2713 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
2714 end_of_buf);
d324f08d
PS		 2715 break;
2716 }
2717
2718 *lastentry = (char *)entryptr;
2719 entrycount++;
2720
2721 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
2722 if (!next_offset)
2723 break;
2724 }
2725
2726 return entrycount;
2727}
2728
2729/*
2730 * Readdir/FindFirst
2731 */
2732int
2733SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
2734 u64 persistent_fid, u64 volatile_fid, int index,
2735 struct cifs_search_info *srch_inf)
2736{
2737 struct smb2_query_directory_req *req;
2738 struct smb2_query_directory_rsp *rsp = NULL;
2739 struct kvec iov[2];
da502f7d 2740 struct kvec rsp_iov;
d324f08d
PS		 2741 int rc = 0;
2742 int len;
75fdfc84 2743 int resp_buftype = CIFS_NO_BUFFER;
d324f08d
PS		 2744 unsigned char *bufptr;
2745 struct TCP_Server_Info *server;
2746 struct cifs_ses *ses = tcon->ses;
2747 __le16 asteriks = cpu_to_le16('*');
2748 char *end_of_smb;
2749 unsigned int output_size = CIFSMaxBufSize;
2750 size_t info_buf_size;
7fb8986e 2751 int flags = 0;
d324f08d
PS		 2752
2753 if (ses && (ses->server))
2754 server = ses->server;
2755 else
2756 return -EIO;
2757
2758 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
2759 if (rc)
2760 return rc;
2761
7fb8986e
PS		 2762 if (encryption_required(tcon))
2763 flags |= CIFS_TRANSFORM_REQ;
2764
d324f08d
PS		 2765 switch (srch_inf->info_level) {
2766 case SMB_FIND_FILE_DIRECTORY_INFO:
2767 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
2768 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
2769 break;
2770 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
2771 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
2772 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
2773 break;
2774 default:
f96637be
JP		 2775 cifs_dbg(VFS, "info level %u isn't supported\n",
2776 srch_inf->info_level);
d324f08d
PS		 2777 rc = -EINVAL;
2778 goto qdir_exit;
2779 }
2780
2781 req->FileIndex = cpu_to_le32(index);
2782 req->PersistentFileId = persistent_fid;
2783 req->VolatileFileId = volatile_fid;
2784
2785 len = 0x2;
2786 bufptr = req->Buffer;
2787 memcpy(bufptr, &asteriks, len);
2788
2789 req->FileNameOffset =
2790 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
2791 req->FileNameLength = cpu_to_le16(len);
2792 /*
2793 * BB could be 30 bytes or so longer if we used SMB2 specific
2794 * buffer lengths, but this is safe and close enough.
2795 */
2796 output_size = min_t(unsigned int, output_size, server->maxBuf);
2797 output_size = min_t(unsigned int, output_size, 2 << 15);
2798 req->OutputBufferLength = cpu_to_le32(output_size);
2799
2800 iov[0].iov_base = (char *)req;
2801 /* 4 for RFC1001 length and 1 for Buffer */
2802 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2803
2804 iov[1].iov_base = (char *)(req->Buffer);
2805 iov[1].iov_len = len;
2806
2807 inc_rfc1001_len(req, len - 1 /* Buffer */);
2808
7fb8986e 2809 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2810 cifs_small_buf_release(req);
2811 rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
e5d04887 2812
d324f08d 2813 if (rc) {
31473fc4
PS		 2814 if (rc == -ENODATA &&
2815 rsp->hdr.sync_hdr.Status == STATUS_NO_MORE_FILES) {
52755808
PS		 2816 srch_inf->endOfSearch = true;
2817 rc = 0;
2818 }
d324f08d
PS		 2819 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
2820 goto qdir_exit;
2821 }
d324f08d
PS		 2822
2823 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2824 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2825 info_buf_size);
2826 if (rc)
2827 goto qdir_exit;
2828
2829 srch_inf->unicode = true;
2830
2831 if (srch_inf->ntwrk_buf_start) {
2832 if (srch_inf->smallBuf)
2833 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
2834 else
2835 cifs_buf_release(srch_inf->ntwrk_buf_start);
2836 }
2837 srch_inf->ntwrk_buf_start = (char *)rsp;
2838 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
2839 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
2840 /* 4 for rfc1002 length field */
2841 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
2842 srch_inf->entries_in_buffer =
2843 num_entries(srch_inf->srch_entries_start, end_of_smb,
2844 &srch_inf->last_entry, info_buf_size);
2845 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
f96637be
JP		 2846 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
2847 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
2848 srch_inf->srch_entries_start, srch_inf->last_entry);
d324f08d
PS		 2849 if (resp_buftype == CIFS_LARGE_BUFFER)
2850 srch_inf->smallBuf = false;
2851 else if (resp_buftype == CIFS_SMALL_BUFFER)
2852 srch_inf->smallBuf = true;
2853 else
f96637be 2854 cifs_dbg(VFS, "illegal search buffer type\n");
d324f08d 2855
d324f08d
PS		 2856 return rc;
2857
2858qdir_exit:
2859 free_rsp_buf(resp_buftype, rsp);
2860 return rc;
2861}
2862
35143eb5
PS		 2863static int
2864send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
c839ff24 2865 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
35143eb5
PS		 2866 unsigned int num, void **data, unsigned int *size)
2867{
2868 struct smb2_set_info_req *req;
2869 struct smb2_set_info_rsp *rsp = NULL;
2870 struct kvec *iov;
da502f7d 2871 struct kvec rsp_iov;
35143eb5
PS		 2872 int rc = 0;
2873 int resp_buftype;
2874 unsigned int i;
2875 struct TCP_Server_Info *server;
2876 struct cifs_ses *ses = tcon->ses;
7fb8986e 2877 int flags = 0;
35143eb5
PS		 2878
2879 if (ses && (ses->server))
2880 server = ses->server;
2881 else
2882 return -EIO;
2883
2884 if (!num)
2885 return -EINVAL;
2886
2887 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
2888 if (!iov)
2889 return -ENOMEM;
2890
2891 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
2892 if (rc) {
2893 kfree(iov);
2894 return rc;
2895 }
2896
7fb8986e
PS		 2897 if (encryption_required(tcon))
2898 flags |= CIFS_TRANSFORM_REQ;
2899
31473fc4 2900 req->hdr.sync_hdr.ProcessId = cpu_to_le32(pid);
c839ff24 2901
35143eb5
PS		 2902 req->InfoType = SMB2_O_INFO_FILE;
2903 req->FileInfoClass = info_class;
2904 req->PersistentFileId = persistent_fid;
2905 req->VolatileFileId = volatile_fid;
2906
2907 /* 4 for RFC1001 length and 1 for Buffer */
2908 req->BufferOffset =
2909 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
2910 req->BufferLength = cpu_to_le32(*size);
2911
2912 inc_rfc1001_len(req, *size - 1 /* Buffer */);
2913
2914 memcpy(req->Buffer, *data, *size);
2915
2916 iov[0].iov_base = (char *)req;
2917 /* 4 for RFC1001 length */
2918 iov[0].iov_len = get_rfc1002_length(req) + 4;
2919
2920 for (i = 1; i < num; i++) {
2921 inc_rfc1001_len(req, size[i]);
2922 le32_add_cpu(&req->BufferLength, size[i]);
2923 iov[i].iov_base = (char *)data[i];
2924 iov[i].iov_len = size[i];
2925 }
2926
7fb8986e 2927 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, flags, &rsp_iov);
da502f7d
PS		 2928 cifs_small_buf_release(req);
2929 rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
35143eb5 2930
7d3fb24b 2931 if (rc != 0)
35143eb5 2932 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
7d3fb24b 2933
35143eb5
PS		 2934 free_rsp_buf(resp_buftype, rsp);
2935 kfree(iov);
2936 return rc;
2937}
2938
2939int
2940SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
2941 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2942{
2943 struct smb2_file_rename_info info;
2944 void **data;
2945 unsigned int size[2];
2946 int rc;
2947 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2948
2949 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2950 if (!data)
2951 return -ENOMEM;
2952
2953 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
2954 /* 0 = fail if target already exists */
2955 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2956 info.FileNameLength = cpu_to_le32(len);
2957
2958 data[0] = &info;
2959 size[0] = sizeof(struct smb2_file_rename_info);
2960
2961 data[1] = target_file;
2962 size[1] = len + 2 /* null */;
2963
2964 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
c839ff24
PS		 2965 current->tgid, FILE_RENAME_INFORMATION, 2, data,
2966 size);
35143eb5
PS		 2967 kfree(data);
2968 return rc;
2969}
568798cc 2970
897fba11
SF		 2971int
2972SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
2973 u64 persistent_fid, u64 volatile_fid)
2974{
2975 __u8 delete_pending = 1;
2976 void *data;
2977 unsigned int size;
2978
2979 data = &delete_pending;
2980 size = 1; /* sizeof __u8 */
2981
2982 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2983 current->tgid, FILE_DISPOSITION_INFORMATION, 1, &data,
2984 &size);
2985}
2986
568798cc
PS		 2987int
2988SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
2989 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2990{
2991 struct smb2_file_link_info info;
2992 void **data;
2993 unsigned int size[2];
2994 int rc;
2995 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2996
2997 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2998 if (!data)
2999 return -ENOMEM;
3000
3001 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
3002 /* 0 = fail if link already exists */
3003 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3004 info.FileNameLength = cpu_to_le32(len);
3005
3006 data[0] = &info;
3007 size[0] = sizeof(struct smb2_file_link_info);
3008
3009 data[1] = target_file;
3010 size[1] = len + 2 /* null */;
3011
3012 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
c839ff24 3013 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
568798cc
PS		 3014 kfree(data);
3015 return rc;
3016}
c839ff24
PS		 3017
3018int
3019SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
f29ebb47 3020 u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc)
c839ff24
PS		 3021{
3022 struct smb2_file_eof_info info;
3023 void *data;
3024 unsigned int size;
3025
3026 info.EndOfFile = *eof;
3027
3028 data = &info;
3029 size = sizeof(struct smb2_file_eof_info);
3030
f29ebb47
SF		 3031 if (is_falloc)
3032 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3033 pid, FILE_ALLOCATION_INFORMATION, 1, &data, &size);
3034 else
3035 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3036 pid, FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
c839ff24 3037}
1feeaac7
PS		 3038
3039int
3040SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
3041 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
3042{
3043 unsigned int size;
3044 size = sizeof(FILE_BASIC_INFO);
3045 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3046 current->tgid, FILE_BASIC_INFORMATION, 1,
3047 (void **)&buf, &size);
3048}
983c88a4
PS		 3049
3050int
3051SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
3052 const u64 persistent_fid, const u64 volatile_fid,
3053 __u8 oplock_level)
3054{
3055 int rc;
3056 struct smb2_oplock_break *req = NULL;
7fb8986e 3057 int flags = CIFS_OBREAK_OP;
983c88a4 3058
f96637be 3059 cifs_dbg(FYI, "SMB2_oplock_break\n");
983c88a4 3060 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
983c88a4
PS		 3061 if (rc)
3062 return rc;
3063
7fb8986e
PS		 3064 if (encryption_required(tcon))
3065 flags |= CIFS_TRANSFORM_REQ;
3066
983c88a4
PS		 3067 req->VolatileFid = volatile_fid;
3068 req->PersistentFid = persistent_fid;
3069 req->OplockLevel = oplock_level;
31473fc4 3070 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
983c88a4 3071
7fb8986e 3072 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, flags);
da502f7d 3073 cifs_small_buf_release(req);
983c88a4
PS		 3074
3075 if (rc) {
3076 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 3077 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
983c88a4
PS		 3078 }
3079
3080 return rc;
3081}
6fc05c25
PS		 3082
3083static void
3084copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
3085 struct kstatfs *kst)
3086{
3087 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
3088 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
3089 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
3090 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
3091 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
3092 return;
3093}
3094
3095static int
3096build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
3097 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
3098{
3099 int rc;
3100 struct smb2_query_info_req *req;
3101
f96637be 3102 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
6fc05c25
PS		 3103
3104 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
3105 return -EIO;
3106
3107 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
3108 if (rc)
3109 return rc;
3110
3111 req->InfoType = SMB2_O_INFO_FILESYSTEM;
3112 req->FileInfoClass = level;
3113 req->PersistentFileId = persistent_fid;
3114 req->VolatileFileId = volatile_fid;
3115 /* 4 for rfc1002 length field and 1 for pad */
3116 req->InputBufferOffset =
3117 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
3118 req->OutputBufferLength = cpu_to_le32(
3119 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
3120
3121 iov->iov_base = (char *)req;
3122 /* 4 for rfc1002 length field */
3123 iov->iov_len = get_rfc1002_length(req) + 4;
3124 return 0;
3125}
3126
3127int
3128SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
3129 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
3130{
3131 struct smb2_query_info_rsp *rsp = NULL;
3132 struct kvec iov;
da502f7d 3133 struct kvec rsp_iov;
6fc05c25
PS		 3134 int rc = 0;
3135 int resp_buftype;
3136 struct cifs_ses *ses = tcon->ses;
3137 struct smb2_fs_full_size_info *info = NULL;
7fb8986e 3138 int flags = 0;
6fc05c25
PS		 3139
3140 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
3141 sizeof(struct smb2_fs_full_size_info),
3142 persistent_fid, volatile_fid);
3143 if (rc)
3144 return rc;
3145
7fb8986e
PS		 3146 if (encryption_required(tcon))
3147 flags |= CIFS_TRANSFORM_REQ;
3148
3149 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d 3150 cifs_small_buf_release(iov.iov_base);
6fc05c25
PS		 3151 if (rc) {
3152 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
34f62640 3153 goto qfsinf_exit;
6fc05c25 3154 }
da502f7d 3155 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
6fc05c25
PS		 3156
3157 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
3158 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
3159 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
3160 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
3161 sizeof(struct smb2_fs_full_size_info));
3162 if (!rc)
3163 copy_fs_info_to_kstatfs(info, fsdata);
3164
34f62640 3165qfsinf_exit:
da502f7d 3166 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
34f62640
SF		 3167 return rc;
3168}
3169
3170int
3171SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2167114c 3172 u64 persistent_fid, u64 volatile_fid, int level)
34f62640
SF		 3173{
3174 struct smb2_query_info_rsp *rsp = NULL;
3175 struct kvec iov;
da502f7d 3176 struct kvec rsp_iov;
34f62640 3177 int rc = 0;
2167114c 3178 int resp_buftype, max_len, min_len;
34f62640
SF		 3179 struct cifs_ses *ses = tcon->ses;
3180 unsigned int rsp_len, offset;
7fb8986e 3181 int flags = 0;
34f62640 3182
2167114c
SF		 3183 if (level == FS_DEVICE_INFORMATION) {
3184 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3185 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3186 } else if (level == FS_ATTRIBUTE_INFORMATION) {
3187 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
3188 min_len = MIN_FS_ATTR_INFO_SIZE;
af6a12ea
SF		 3189 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
3190 max_len = sizeof(struct smb3_fs_ss_info);
3191 min_len = sizeof(struct smb3_fs_ss_info);
2167114c 3192 } else {
af6a12ea 3193 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2167114c
SF		 3194 return -EINVAL;
3195 }
3196
3197 rc = build_qfs_info_req(&iov, tcon, level, max_len,
34f62640
SF		 3198 persistent_fid, volatile_fid);
3199 if (rc)
3200 return rc;
3201
7fb8986e
PS		 3202 if (encryption_required(tcon))
3203 flags |= CIFS_TRANSFORM_REQ;
3204
3205 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov);
da502f7d 3206 cifs_small_buf_release(iov.iov_base);
34f62640
SF		 3207 if (rc) {
3208 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
3209 goto qfsattr_exit;
3210 }
da502f7d 3211 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
34f62640
SF		 3212
3213 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
3214 offset = le16_to_cpu(rsp->OutputBufferOffset);
2167114c
SF		 3215 rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
3216 if (rc)
3217 goto qfsattr_exit;
3218
3219 if (level == FS_ATTRIBUTE_INFORMATION)
34f62640
SF		 3220 memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
3221 + (char *)&rsp->hdr, min_t(unsigned int,
2167114c
SF		 3222 rsp_len, max_len));
3223 else if (level == FS_DEVICE_INFORMATION)
3224 memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
3225 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
af6a12ea
SF		 3226 else if (level == FS_SECTOR_SIZE_INFORMATION) {
3227 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
3228 (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
3229 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
3230 tcon->perf_sector_size =
3231 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
3232 }
34f62640
SF		 3233
3234qfsattr_exit:
da502f7d 3235 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
6fc05c25
PS		 3236 return rc;
3237}
f7ba7fe6
PS		 3238
3239int
3240smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
3241 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3242 const __u32 num_lock, struct smb2_lock_element *buf)
3243{
3244 int rc = 0;
3245 struct smb2_lock_req *req = NULL;
3246 struct kvec iov[2];
da502f7d 3247 struct kvec rsp_iov;
f7ba7fe6
PS		 3248 int resp_buf_type;
3249 unsigned int count;
7fb8986e 3250 int flags = CIFS_NO_RESP;
f7ba7fe6 3251
f96637be 3252 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
f7ba7fe6
PS		 3253
3254 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
3255 if (rc)
3256 return rc;
3257
7fb8986e
PS		 3258 if (encryption_required(tcon))
3259 flags |= CIFS_TRANSFORM_REQ;
3260
31473fc4 3261 req->hdr.sync_hdr.ProcessId = cpu_to_le32(pid);
f7ba7fe6
PS		 3262 req->LockCount = cpu_to_le16(num_lock);
3263
3264 req->PersistentFileId = persist_fid;
3265 req->VolatileFileId = volatile_fid;
3266
3267 count = num_lock * sizeof(struct smb2_lock_element);
3268 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
3269
3270 iov[0].iov_base = (char *)req;
3271 /* 4 for rfc1002 length field and count for all locks */
3272 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
3273 iov[1].iov_base = (char *)buf;
3274 iov[1].iov_len = count;
3275
3276 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
7fb8986e 3277 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, flags,
da502f7d
PS		 3278 &rsp_iov);
3279 cifs_small_buf_release(req);
f7ba7fe6 3280 if (rc) {
f96637be 3281 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
f7ba7fe6
PS		 3282 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
3283 }
3284
3285 return rc;
3286}
3287
3288int
3289SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
3290 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3291 const __u64 length, const __u64 offset, const __u32 lock_flags,
3292 const bool wait)
3293{
3294 struct smb2_lock_element lock;
3295
3296 lock.Offset = cpu_to_le64(offset);
3297 lock.Length = cpu_to_le64(length);
3298 lock.Flags = cpu_to_le32(lock_flags);
3299 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
3300 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
3301
3302 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
3303}
0822f514
PS		 3304
3305int
3306SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
3307 __u8 *lease_key, const __le32 lease_state)
3308{
3309 int rc;
3310 struct smb2_lease_ack *req = NULL;
7fb8986e 3311 int flags = CIFS_OBREAK_OP;
0822f514 3312
f96637be 3313 cifs_dbg(FYI, "SMB2_lease_break\n");
0822f514 3314 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
0822f514
PS		 3315 if (rc)
3316 return rc;
3317
7fb8986e
PS		 3318 if (encryption_required(tcon))
3319 flags |= CIFS_TRANSFORM_REQ;
3320
31473fc4 3321 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
0822f514
PS		 3322 req->StructureSize = cpu_to_le16(36);
3323 inc_rfc1001_len(req, 12);
3324
3325 memcpy(req->LeaseKey, lease_key, 16);
3326 req->LeaseState = lease_state;
3327
7fb8986e 3328 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, flags);
da502f7d 3329 cifs_small_buf_release(req);
0822f514
PS		 3330
3331 if (rc) {
3332 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 3333 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
0822f514
PS		 3334 }
3335
3336 return rc;
3337}
Linux 6.x block layer and io_uring tree(s)