Charge at least one credit, if server says that it supports multicredit
[deliverable/linux.git] / fs / cifs / smb2pdu.c
CommitLineData
ec2e4523
PS
1/*
2 * fs/cifs/smb2pdu.c
3 *
2b80d049 4 * Copyright (C) International Business Machines Corp., 2009, 2013
ec2e4523
PS
5 * Etersoft, 2012
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
8 *
9 * Contains the routines for constructing the SMB2 PDUs themselves
10 *
11 * This library is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published
13 * by the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
15 *
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
19 * the GNU Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 */
25
26 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
27 /* Note that there are handle based routines which must be */
28 /* treated slightly differently for reconnection purposes since we never */
29 /* want to reuse a stale file handle and only the caller knows the file info */
30
31#include <linux/fs.h>
32#include <linux/kernel.h>
33#include <linux/vfs.h>
09a4707e 34#include <linux/task_io_accounting_ops.h>
ec2e4523 35#include <linux/uaccess.h>
33319141 36#include <linux/pagemap.h>
ec2e4523
PS
37#include <linux/xattr.h>
38#include "smb2pdu.h"
39#include "cifsglob.h"
40#include "cifsacl.h"
41#include "cifsproto.h"
42#include "smb2proto.h"
43#include "cifs_unicode.h"
44#include "cifs_debug.h"
45#include "ntlmssp.h"
46#include "smb2status.h"
09a4707e 47#include "smb2glob.h"
d324f08d 48#include "cifspdu.h"
ec2e4523
PS
49
50/*
51 * The following table defines the expected "StructureSize" of SMB2 requests
52 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
53 *
54 * Note that commands are defined in smb2pdu.h in le16 but the array below is
55 * indexed by command in host byte order.
56 */
57static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
58 /* SMB2_NEGOTIATE */ 36,
59 /* SMB2_SESSION_SETUP */ 25,
60 /* SMB2_LOGOFF */ 4,
61 /* SMB2_TREE_CONNECT */ 9,
62 /* SMB2_TREE_DISCONNECT */ 4,
63 /* SMB2_CREATE */ 57,
64 /* SMB2_CLOSE */ 24,
65 /* SMB2_FLUSH */ 24,
66 /* SMB2_READ */ 49,
67 /* SMB2_WRITE */ 49,
68 /* SMB2_LOCK */ 48,
69 /* SMB2_IOCTL */ 57,
70 /* SMB2_CANCEL */ 4,
71 /* SMB2_ECHO */ 4,
72 /* SMB2_QUERY_DIRECTORY */ 33,
73 /* SMB2_CHANGE_NOTIFY */ 32,
74 /* SMB2_QUERY_INFO */ 41,
75 /* SMB2_SET_INFO */ 33,
76 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
77};
78
79
80static void
81smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd /* command */ ,
82 const struct cifs_tcon *tcon)
83{
84 struct smb2_pdu *pdu = (struct smb2_pdu *)hdr;
85 char *temp = (char *)hdr;
86 /* lookup word count ie StructureSize from table */
87 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_cmd)];
88
89 /*
90 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
91 * largest operations (Create)
92 */
93 memset(temp, 0, 256);
94
95 /* Note this is only network field converted to big endian */
96 hdr->smb2_buf_length = cpu_to_be32(parmsize + sizeof(struct smb2_hdr)
97 - 4 /* RFC 1001 length field itself not counted */);
98
99 hdr->ProtocolId[0] = 0xFE;
100 hdr->ProtocolId[1] = 'S';
101 hdr->ProtocolId[2] = 'M';
102 hdr->ProtocolId[3] = 'B';
103 hdr->StructureSize = cpu_to_le16(64);
104 hdr->Command = smb2_cmd;
105 hdr->CreditRequest = cpu_to_le16(2); /* BB make this dynamic */
106 hdr->ProcessId = cpu_to_le32((__u16)current->tgid);
107
108 if (!tcon)
109 goto out;
110
2b80d049
SF
111 /* BB FIXME when we do write > 64K add +1 for every 64K in req or rsp */
112 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
113 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
114 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)
115 hdr->CreditCharge = cpu_to_le16(1);
116 /* else CreditCharge MBZ */
117
ec2e4523
PS
118 hdr->TreeId = tcon->tid;
119 /* Uid is not converted */
120 if (tcon->ses)
121 hdr->SessionId = tcon->ses->Suid;
122 /* BB check following DFS flags BB */
123 /* BB do we have to add check for SHI1005_FLAGS_DFS_ROOT too? */
faaf946a
PS
124 if (tcon->share_flags & SHI1005_FLAGS_DFS)
125 hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS;
ec2e4523
PS
126 /* BB how does SMB2 do case sensitive? */
127 /* if (tcon->nocase)
128 hdr->Flags |= SMBFLG_CASELESS; */
38d77c50 129 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign)
3c1bf7e4 130 hdr->Flags |= SMB2_FLAGS_SIGNED;
ec2e4523
PS
131out:
132 pdu->StructureSize2 = cpu_to_le16(parmsize);
133 return;
134}
135
136static int
137smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
138{
139 int rc = 0;
aa24d1e9
PS
140 struct nls_table *nls_codepage;
141 struct cifs_ses *ses;
142 struct TCP_Server_Info *server;
143
144 /*
145 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
146 * check for tcp and smb session status done differently
147 * for those three - in the calling routine.
148 */
149 if (tcon == NULL)
150 return rc;
151
152 if (smb2_command == SMB2_TREE_CONNECT)
153 return rc;
154
155 if (tcon->tidStatus == CifsExiting) {
156 /*
157 * only tree disconnect, open, and write,
158 * (and ulogoff which does not have tcon)
159 * are allowed as we start force umount.
160 */
161 if ((smb2_command != SMB2_WRITE) &&
162 (smb2_command != SMB2_CREATE) &&
163 (smb2_command != SMB2_TREE_DISCONNECT)) {
f96637be
JP
164 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
165 smb2_command);
aa24d1e9
PS
166 return -ENODEV;
167 }
168 }
169 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
170 (!tcon->ses->server))
171 return -EIO;
172
173 ses = tcon->ses;
174 server = ses->server;
175
176 /*
177 * Give demultiplex thread up to 10 seconds to reconnect, should be
178 * greater than cifs socket timeout which is 7 seconds
179 */
180 while (server->tcpStatus == CifsNeedReconnect) {
181 /*
182 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
183 * here since they are implicitly done when session drops.
184 */
185 switch (smb2_command) {
186 /*
187 * BB Should we keep oplock break and add flush to exceptions?
188 */
189 case SMB2_TREE_DISCONNECT:
190 case SMB2_CANCEL:
191 case SMB2_CLOSE:
192 case SMB2_OPLOCK_BREAK:
193 return -EAGAIN;
194 }
195
196 wait_event_interruptible_timeout(server->response_q,
197 (server->tcpStatus != CifsNeedReconnect), 10 * HZ);
198
199 /* are we still trying to reconnect? */
200 if (server->tcpStatus != CifsNeedReconnect)
201 break;
202
203 /*
204 * on "soft" mounts we wait once. Hard mounts keep
205 * retrying until process is killed or server comes
206 * back on-line
207 */
208 if (!tcon->retry) {
f96637be 209 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
aa24d1e9
PS
210 return -EHOSTDOWN;
211 }
212 }
213
214 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
215 return rc;
216
217 nls_codepage = load_nls_default();
218
219 /*
220 * need to prevent multiple threads trying to simultaneously reconnect
221 * the same SMB session
222 */
223 mutex_lock(&tcon->ses->session_mutex);
224 rc = cifs_negotiate_protocol(0, tcon->ses);
225 if (!rc && tcon->ses->need_reconnect)
226 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
227
228 if (rc || !tcon->need_reconnect) {
229 mutex_unlock(&tcon->ses->session_mutex);
230 goto out;
231 }
232
233 cifs_mark_open_files_invalid(tcon);
234 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
235 mutex_unlock(&tcon->ses->session_mutex);
f96637be 236 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
aa24d1e9
PS
237 if (rc)
238 goto out;
239 atomic_inc(&tconInfoReconnectCount);
240 /*
241 * BB FIXME add code to check if wsize needs update due to negotiated
242 * smb buffer size shrinking.
243 */
244out:
245 /*
246 * Check if handle based operation so we know whether we can continue
247 * or not without returning to caller to reset file handle.
248 */
249 /*
250 * BB Is flush done by server on drop of tcp session? Should we special
251 * case it and skip above?
252 */
253 switch (smb2_command) {
254 case SMB2_FLUSH:
255 case SMB2_READ:
256 case SMB2_WRITE:
257 case SMB2_LOCK:
258 case SMB2_IOCTL:
259 case SMB2_QUERY_DIRECTORY:
260 case SMB2_CHANGE_NOTIFY:
261 case SMB2_QUERY_INFO:
262 case SMB2_SET_INFO:
263 return -EAGAIN;
264 }
265 unload_nls(nls_codepage);
ec2e4523
PS
266 return rc;
267}
268
269/*
270 * Allocate and return pointer to an SMB request hdr, and set basic
271 * SMB information in the SMB header. If the return code is zero, this
272 * function must have filled in request_buf pointer.
273 */
274static int
275small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
276 void **request_buf)
277{
278 int rc = 0;
279
280 rc = smb2_reconnect(smb2_command, tcon);
281 if (rc)
282 return rc;
283
284 /* BB eventually switch this to SMB2 specific small buf size */
285 *request_buf = cifs_small_buf_get();
286 if (*request_buf == NULL) {
287 /* BB should we add a retry in here if not a writepage? */
288 return -ENOMEM;
289 }
290
291 smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon);
292
293 if (tcon != NULL) {
294#ifdef CONFIG_CIFS_STATS2
ec2e4523
PS
295 uint16_t com_code = le16_to_cpu(smb2_command);
296 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
ec2e4523
PS
297#endif
298 cifs_stats_inc(&tcon->num_smbs_sent);
299 }
300
301 return rc;
302}
303
304static void
305free_rsp_buf(int resp_buftype, void *rsp)
306{
307 if (resp_buftype == CIFS_SMALL_BUFFER)
308 cifs_small_buf_release(rsp);
309 else if (resp_buftype == CIFS_LARGE_BUFFER)
310 cifs_buf_release(rsp);
311}
312
ec2e4523
PS
313
314/*
315 *
316 * SMB2 Worker functions follow:
317 *
318 * The general structure of the worker functions is:
319 * 1) Call smb2_init (assembles SMB2 header)
320 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
321 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
322 * 4) Decode SMB2 command specific fields in the fixed length area
323 * 5) Decode variable length data area (if any for this SMB2 command type)
324 * 6) Call free smb buffer
325 * 7) return
326 *
327 */
328
329int
330SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
331{
332 struct smb2_negotiate_req *req;
333 struct smb2_negotiate_rsp *rsp;
334 struct kvec iov[1];
335 int rc = 0;
336 int resp_buftype;
3534b850 337 struct TCP_Server_Info *server = ses->server;
ec2e4523
PS
338 int blob_offset, blob_length;
339 char *security_blob;
340 int flags = CIFS_NEG_OP;
341
f96637be 342 cifs_dbg(FYI, "Negotiate protocol\n");
ec2e4523 343
3534b850
JL
344 if (!server) {
345 WARN(1, "%s: server is NULL!\n", __func__);
346 return -EIO;
ec2e4523
PS
347 }
348
349 rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
350 if (rc)
351 return rc;
352
ec2e4523
PS
353 req->hdr.SessionId = 0;
354
e4aa25e7 355 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
ec2e4523 356
e4aa25e7
SF
357 req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */
358 inc_rfc1001_len(req, 2);
ec2e4523
PS
359
360 /* only one of SMB2 signing flags may be set in SMB2 request */
38d77c50 361 if (ses->sign)
9cd2e62c 362 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
38d77c50 363 else if (global_secflags & CIFSSEC_MAY_SIGN)
9cd2e62c 364 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
38d77c50
JL
365 else
366 req->SecurityMode = 0;
ec2e4523 367
e4aa25e7 368 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
ec2e4523 369
b8c32dbb
PS
370 memcpy(req->ClientGUID, cifs_client_guid, SMB2_CLIENT_GUID_SIZE);
371
ec2e4523
PS
372 iov[0].iov_base = (char *)req;
373 /* 4 for rfc1002 length field */
374 iov[0].iov_len = get_rfc1002_length(req) + 4;
375
376 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags);
377
378 rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base;
379 /*
380 * No tcon so can't do
381 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
382 */
383 if (rc != 0)
384 goto neg_exit;
385
f96637be 386 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
ec2e4523 387
e4aa25e7
SF
388 /* BB we may eventually want to match the negotiated vs. requested
389 dialect, even though we are only requesting one at a time */
390 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
f96637be 391 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
e4aa25e7 392 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
f96637be 393 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
e4aa25e7 394 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
f96637be 395 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
20b6d8b4
SF
396 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
397 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
ec2e4523 398 else {
f96637be
JP
399 cifs_dbg(VFS, "Illegal dialect returned by server %d\n",
400 le16_to_cpu(rsp->DialectRevision));
ec2e4523
PS
401 rc = -EIO;
402 goto neg_exit;
403 }
404 server->dialect = le16_to_cpu(rsp->DialectRevision);
405
e598d1d8
JL
406 /* SMB2 only has an extended negflavor */
407 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
ec2e4523
PS
408 server->maxBuf = le32_to_cpu(rsp->MaxTransactSize);
409 server->max_read = le32_to_cpu(rsp->MaxReadSize);
410 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
411 /* BB Do we need to validate the SecurityMode? */
412 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
413 server->capabilities = le32_to_cpu(rsp->Capabilities);
29e20f9c
PS
414 /* Internal types */
415 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
ec2e4523
PS
416
417 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
418 &rsp->hdr);
419 if (blob_length == 0) {
f96637be 420 cifs_dbg(VFS, "missing security blob on negprot\n");
ec2e4523
PS
421 rc = -EIO;
422 goto neg_exit;
423 }
3c1bf7e4 424
38d77c50 425 rc = cifs_enable_signing(server, ses->sign);
ec2e4523 426#ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
9ddec561
JL
427 if (rc)
428 goto neg_exit;
429
ec2e4523
PS
430 rc = decode_neg_token_init(security_blob, blob_length,
431 &server->sec_type);
432 if (rc == 1)
433 rc = 0;
434 else if (rc == 0) {
435 rc = -EIO;
436 goto neg_exit;
437 }
438#endif
439
440neg_exit:
441 free_rsp_buf(resp_buftype, rsp);
442 return rc;
443}
5478f9ba
PS
444
445int
446SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
447 const struct nls_table *nls_cp)
448{
449 struct smb2_sess_setup_req *req;
450 struct smb2_sess_setup_rsp *rsp = NULL;
451 struct kvec iov[2];
452 int rc = 0;
453 int resp_buftype;
454 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
3534b850 455 struct TCP_Server_Info *server = ses->server;
5478f9ba
PS
456 u16 blob_length = 0;
457 char *security_blob;
458 char *ntlmssp_blob = NULL;
459 bool use_spnego = false; /* else use raw ntlmssp */
460
f96637be 461 cifs_dbg(FYI, "Session Setup\n");
5478f9ba 462
3534b850
JL
463 if (!server) {
464 WARN(1, "%s: server is NULL!\n", __func__);
465 return -EIO;
5478f9ba
PS
466 }
467
468 /*
469 * If memory allocation is successful, caller of this function
470 * frees it.
471 */
472 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
473 if (!ses->ntlmssp)
474 return -ENOMEM;
475
3f618223
JL
476 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
477 ses->sectype = RawNTLMSSP;
5478f9ba
PS
478
479ssetup_ntlmssp_authenticate:
480 if (phase == NtLmChallenge)
481 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
482
483 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
484 if (rc)
485 return rc;
486
5478f9ba
PS
487 req->hdr.SessionId = 0; /* First session, not a reauthenticate */
488 req->VcNumber = 0; /* MBZ */
489 /* to enable echos and oplocks */
490 req->hdr.CreditRequest = cpu_to_le16(3);
491
492 /* only one of SMB2 signing flags may be set in SMB2 request */
38d77c50
JL
493 if (server->sign)
494 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
495 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
496 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
497 else
498 req->SecurityMode = 0;
499
5478f9ba
PS
500 req->Capabilities = 0;
501 req->Channel = 0; /* MBZ */
502
503 iov[0].iov_base = (char *)req;
504 /* 4 for rfc1002 length field and 1 for pad */
505 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
506 if (phase == NtLmNegotiate) {
507 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
508 GFP_KERNEL);
509 if (ntlmssp_blob == NULL) {
510 rc = -ENOMEM;
511 goto ssetup_exit;
512 }
513 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
514 if (use_spnego) {
515 /* blob_length = build_spnego_ntlmssp_blob(
516 &security_blob,
517 sizeof(struct _NEGOTIATE_MESSAGE),
518 ntlmssp_blob); */
519 /* BB eventually need to add this */
f96637be 520 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
5478f9ba
PS
521 rc = -EOPNOTSUPP;
522 kfree(ntlmssp_blob);
523 goto ssetup_exit;
524 } else {
525 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
526 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
527 security_blob = ntlmssp_blob;
528 }
529 } else if (phase == NtLmAuthenticate) {
530 req->hdr.SessionId = ses->Suid;
531 ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500,
532 GFP_KERNEL);
533 if (ntlmssp_blob == NULL) {
5478f9ba
PS
534 rc = -ENOMEM;
535 goto ssetup_exit;
536 }
537 rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses,
538 nls_cp);
539 if (rc) {
f96637be
JP
540 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n",
541 rc);
5478f9ba
PS
542 goto ssetup_exit; /* BB double check error handling */
543 }
544 if (use_spnego) {
545 /* blob_length = build_spnego_ntlmssp_blob(
546 &security_blob,
547 blob_length,
548 ntlmssp_blob); */
f96637be 549 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
5478f9ba
PS
550 rc = -EOPNOTSUPP;
551 kfree(ntlmssp_blob);
552 goto ssetup_exit;
553 } else {
554 security_blob = ntlmssp_blob;
555 }
556 } else {
f96637be 557 cifs_dbg(VFS, "illegal ntlmssp phase\n");
5478f9ba
PS
558 rc = -EIO;
559 goto ssetup_exit;
560 }
561
562 /* Testing shows that buffer offset must be at location of Buffer[0] */
563 req->SecurityBufferOffset =
564 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
565 1 /* pad */ - 4 /* rfc1001 len */);
566 req->SecurityBufferLength = cpu_to_le16(blob_length);
567 iov[1].iov_base = security_blob;
568 iov[1].iov_len = blob_length;
569
570 inc_rfc1001_len(req, blob_length - 1 /* pad */);
571
572 /* BB add code to build os and lm fields */
573
6d8b59d7
SF
574 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype,
575 CIFS_LOG_ERROR | CIFS_NEG_OP);
5478f9ba
PS
576
577 kfree(security_blob);
578 rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base;
4ca3a99c
PS
579 if (resp_buftype != CIFS_NO_BUFFER &&
580 rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) {
5478f9ba 581 if (phase != NtLmNegotiate) {
f96637be 582 cifs_dbg(VFS, "Unexpected more processing error\n");
5478f9ba
PS
583 goto ssetup_exit;
584 }
585 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
4ca3a99c 586 le16_to_cpu(rsp->SecurityBufferOffset)) {
f96637be
JP
587 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
588 le16_to_cpu(rsp->SecurityBufferOffset));
5478f9ba
PS
589 rc = -EIO;
590 goto ssetup_exit;
591 }
592
593 /* NTLMSSP Negotiate sent now processing challenge (response) */
594 phase = NtLmChallenge; /* process ntlmssp challenge */
595 rc = 0; /* MORE_PROCESSING is not an error here but expected */
596 ses->Suid = rsp->hdr.SessionId;
597 rc = decode_ntlmssp_challenge(rsp->Buffer,
598 le16_to_cpu(rsp->SecurityBufferLength), ses);
599 }
600
601 /*
602 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
603 * but at least the raw NTLMSSP case works.
604 */
605 /*
606 * No tcon so can't do
607 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
608 */
609 if (rc != 0)
610 goto ssetup_exit;
611
5478f9ba
PS
612 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
613ssetup_exit:
614 free_rsp_buf(resp_buftype, rsp);
615
616 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
617 if ((phase == NtLmChallenge) && (rc == 0))
618 goto ssetup_ntlmssp_authenticate;
619 return rc;
620}
621
622int
623SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
624{
625 struct smb2_logoff_req *req; /* response is also trivial struct */
626 int rc = 0;
627 struct TCP_Server_Info *server;
628
f96637be 629 cifs_dbg(FYI, "disconnect session %p\n", ses);
5478f9ba
PS
630
631 if (ses && (ses->server))
632 server = ses->server;
633 else
634 return -EIO;
635
636 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
637 if (rc)
638 return rc;
639
640 /* since no tcon, smb2_init can not do this, so do here */
641 req->hdr.SessionId = ses->Suid;
38d77c50 642 if (server->sign)
3c1bf7e4 643 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
5478f9ba
PS
644
645 rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0);
646 /*
647 * No tcon so can't do
648 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
649 */
650 return rc;
651}
faaf946a
PS
652
653static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
654{
d60622eb 655 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
faaf946a
PS
656}
657
658#define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
659
660int
661SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
662 struct cifs_tcon *tcon, const struct nls_table *cp)
663{
664 struct smb2_tree_connect_req *req;
665 struct smb2_tree_connect_rsp *rsp = NULL;
666 struct kvec iov[2];
667 int rc = 0;
668 int resp_buftype;
669 int unc_path_len;
670 struct TCP_Server_Info *server;
671 __le16 *unc_path = NULL;
672
f96637be 673 cifs_dbg(FYI, "TCON\n");
faaf946a
PS
674
675 if ((ses->server) && tree)
676 server = ses->server;
677 else
678 return -EIO;
679
680 if (tcon && tcon->bad_network_name)
681 return -ENOENT;
682
683 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
684 if (unc_path == NULL)
685 return -ENOMEM;
686
687 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
688 unc_path_len *= 2;
689 if (unc_path_len < 2) {
690 kfree(unc_path);
691 return -EINVAL;
692 }
693
694 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
695 if (rc) {
696 kfree(unc_path);
697 return rc;
698 }
699
700 if (tcon == NULL) {
701 /* since no tcon, smb2_init can not do this, so do here */
702 req->hdr.SessionId = ses->Suid;
703 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
704 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
705 }
706
707 iov[0].iov_base = (char *)req;
708 /* 4 for rfc1002 length field and 1 for pad */
709 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
710
711 /* Testing shows that buffer offset must be at location of Buffer[0] */
712 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
713 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
714 req->PathLength = cpu_to_le16(unc_path_len - 2);
715 iov[1].iov_base = unc_path;
716 iov[1].iov_len = unc_path_len;
717
718 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
719
720 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
721 rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base;
722
723 if (rc != 0) {
724 if (tcon) {
725 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
726 tcon->need_reconnect = true;
727 }
728 goto tcon_error_exit;
729 }
730
faaf946a
PS
731 if (tcon == NULL) {
732 ses->ipc_tid = rsp->hdr.TreeId;
733 goto tcon_exit;
734 }
735
736 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
f96637be 737 cifs_dbg(FYI, "connection to disk share\n");
faaf946a
PS
738 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
739 tcon->ipc = true;
f96637be 740 cifs_dbg(FYI, "connection to pipe share\n");
faaf946a
PS
741 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
742 tcon->print = true;
f96637be 743 cifs_dbg(FYI, "connection to printer\n");
faaf946a 744 } else {
f96637be 745 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
faaf946a
PS
746 rc = -EOPNOTSUPP;
747 goto tcon_error_exit;
748 }
749
750 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
769ee6a4 751 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
faaf946a
PS
752 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
753 tcon->tidStatus = CifsGood;
754 tcon->need_reconnect = false;
755 tcon->tid = rsp->hdr.TreeId;
46b51d08 756 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
faaf946a
PS
757
758 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
759 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
f96637be 760 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
faaf946a
PS
761
762tcon_exit:
763 free_rsp_buf(resp_buftype, rsp);
764 kfree(unc_path);
765 return rc;
766
767tcon_error_exit:
768 if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) {
f96637be 769 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
faaf946a
PS
770 tcon->bad_network_name = true;
771 }
772 goto tcon_exit;
773}
774
775int
776SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
777{
778 struct smb2_tree_disconnect_req *req; /* response is trivial */
779 int rc = 0;
780 struct TCP_Server_Info *server;
781 struct cifs_ses *ses = tcon->ses;
782
f96637be 783 cifs_dbg(FYI, "Tree Disconnect\n");
faaf946a
PS
784
785 if (ses && (ses->server))
786 server = ses->server;
787 else
788 return -EIO;
789
790 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
791 return 0;
792
793 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
794 if (rc)
795 return rc;
796
797 rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0);
798 if (rc)
799 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
800
801 return rc;
802}
2503a0db 803
b8c32dbb
PS
804static struct create_lease *
805create_lease_buf(u8 *lease_key, u8 oplock)
806{
807 struct create_lease *buf;
808
d455b72b 809 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
b8c32dbb
PS
810 if (!buf)
811 return NULL;
812
b8c32dbb
PS
813 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
814 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
815 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
816 buf->lcontext.LeaseState = SMB2_LEASE_WRITE_CACHING |
817 SMB2_LEASE_READ_CACHING;
818 else if (oplock == SMB2_OPLOCK_LEVEL_II)
819 buf->lcontext.LeaseState = SMB2_LEASE_READ_CACHING;
820 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
821 buf->lcontext.LeaseState = SMB2_LEASE_HANDLE_CACHING |
822 SMB2_LEASE_READ_CACHING |
823 SMB2_LEASE_WRITE_CACHING;
824
825 buf->ccontext.DataOffset = cpu_to_le16(offsetof
826 (struct create_lease, lcontext));
827 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
828 buf->ccontext.NameOffset = cpu_to_le16(offsetof
829 (struct create_lease, Name));
830 buf->ccontext.NameLength = cpu_to_le16(4);
831 buf->Name[0] = 'R';
832 buf->Name[1] = 'q';
833 buf->Name[2] = 'L';
834 buf->Name[3] = 's';
835 return buf;
836}
837
838static __u8
839parse_lease_state(struct smb2_create_rsp *rsp)
840{
841 char *data_offset;
842 struct create_lease *lc;
b8c32dbb
PS
843 bool found = false;
844
845 data_offset = (char *)rsp;
846 data_offset += 4 + le32_to_cpu(rsp->CreateContextsOffset);
847 lc = (struct create_lease *)data_offset;
848 do {
849 char *name = le16_to_cpu(lc->ccontext.NameOffset) + (char *)lc;
850 if (le16_to_cpu(lc->ccontext.NameLength) != 4 ||
851 strncmp(name, "RqLs", 4)) {
852 lc = (struct create_lease *)((char *)lc
853 + le32_to_cpu(lc->ccontext.Next));
854 continue;
855 }
856 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
857 return SMB2_OPLOCK_LEVEL_NOCHANGE;
858 found = true;
859 break;
860 } while (le32_to_cpu(lc->ccontext.Next) != 0);
861
862 if (!found)
0822f514 863 return 0;
b8c32dbb 864
0822f514 865 return smb2_map_lease_to_oplock(lc->lcontext.LeaseState);
b8c32dbb
PS
866}
867
2503a0db
PS
868int
869SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path,
870 u64 *persistent_fid, u64 *volatile_fid, __u32 desired_access,
f0df737e 871 __u32 create_disposition, __u32 file_attributes, __u32 create_options,
2e44b288 872 __u8 *oplock, struct smb2_file_all_info *buf)
2503a0db
PS
873{
874 struct smb2_create_req *req;
875 struct smb2_create_rsp *rsp;
876 struct TCP_Server_Info *server;
877 struct cifs_ses *ses = tcon->ses;
b8c32dbb 878 struct kvec iov[3];
2503a0db
PS
879 int resp_buftype;
880 int uni_path_len;
b8c32dbb
PS
881 __le16 *copy_path = NULL;
882 int copy_size;
2503a0db
PS
883 int rc = 0;
884 int num_iovecs = 2;
885
f96637be 886 cifs_dbg(FYI, "create/open\n");
2503a0db
PS
887
888 if (ses && (ses->server))
889 server = ses->server;
890 else
891 return -EIO;
892
893 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
894 if (rc)
895 return rc;
896
2503a0db
PS
897 req->ImpersonationLevel = IL_IMPERSONATION;
898 req->DesiredAccess = cpu_to_le32(desired_access);
899 /* File attributes ignored on open (used in create though) */
900 req->FileAttributes = cpu_to_le32(file_attributes);
901 req->ShareAccess = FILE_SHARE_ALL_LE;
902 req->CreateDisposition = cpu_to_le32(create_disposition);
903 req->CreateOptions = cpu_to_le32(create_options);
904 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
905 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)
b8c32dbb 906 - 8 /* pad */ - 4 /* do not count rfc1001 len field */);
2503a0db
PS
907
908 iov[0].iov_base = (char *)req;
909 /* 4 for rfc1002 length field */
910 iov[0].iov_len = get_rfc1002_length(req) + 4;
911
912 /* MUST set path len (NameLength) to 0 opening root of share */
913 if (uni_path_len >= 4) {
914 req->NameLength = cpu_to_le16(uni_path_len - 2);
915 /* -1 since last byte is buf[0] which is sent below (path) */
916 iov[0].iov_len--;
b8c32dbb
PS
917 if (uni_path_len % 8 != 0) {
918 copy_size = uni_path_len / 8 * 8;
919 if (copy_size < uni_path_len)
920 copy_size += 8;
921
922 copy_path = kzalloc(copy_size, GFP_KERNEL);
923 if (!copy_path)
924 return -ENOMEM;
925 memcpy((char *)copy_path, (const char *)path,
926 uni_path_len);
927 uni_path_len = copy_size;
928 path = copy_path;
929 }
930
2503a0db
PS
931 iov[1].iov_len = uni_path_len;
932 iov[1].iov_base = path;
933 /*
934 * -1 since last byte is buf[0] which was counted in
935 * smb2_buf_len.
936 */
937 inc_rfc1001_len(req, uni_path_len - 1);
938 } else {
b8c32dbb
PS
939 iov[0].iov_len += 7;
940 req->hdr.smb2_buf_length = cpu_to_be32(be32_to_cpu(
941 req->hdr.smb2_buf_length) + 8 - 1);
2503a0db
PS
942 num_iovecs = 1;
943 req->NameLength = 0;
944 }
945
b8c32dbb
PS
946 if (!server->oplocks)
947 *oplock = SMB2_OPLOCK_LEVEL_NONE;
948
949 if (!(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
950 *oplock == SMB2_OPLOCK_LEVEL_NONE)
951 req->RequestedOplockLevel = *oplock;
952 else {
953 iov[num_iovecs].iov_base = create_lease_buf(oplock+1, *oplock);
954 if (iov[num_iovecs].iov_base == NULL) {
955 cifs_small_buf_release(req);
956 kfree(copy_path);
957 return -ENOMEM;
958 }
959 iov[num_iovecs].iov_len = sizeof(struct create_lease);
960 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
961 req->CreateContextsOffset = cpu_to_le32(
962 sizeof(struct smb2_create_req) - 4 - 8 +
963 iov[num_iovecs-1].iov_len);
964 req->CreateContextsLength = cpu_to_le32(
965 sizeof(struct create_lease));
966 inc_rfc1001_len(&req->hdr, sizeof(struct create_lease));
967 num_iovecs++;
968 }
969
2503a0db
PS
970 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
971 rsp = (struct smb2_create_rsp *)iov[0].iov_base;
972
973 if (rc != 0) {
974 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
975 goto creat_exit;
976 }
977
2503a0db
PS
978 *persistent_fid = rsp->PersistentFileId;
979 *volatile_fid = rsp->VolatileFileId;
f0df737e
PS
980
981 if (buf) {
982 memcpy(buf, &rsp->CreationTime, 32);
983 buf->AllocationSize = rsp->AllocationSize;
984 buf->EndOfFile = rsp->EndofFile;
985 buf->Attributes = rsp->FileAttributes;
986 buf->NumberOfLinks = cpu_to_le32(1);
987 buf->DeletePending = 0;
988 }
2e44b288 989
b8c32dbb
PS
990 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
991 *oplock = parse_lease_state(rsp);
992 else
993 *oplock = rsp->OplockLevel;
2503a0db 994creat_exit:
b8c32dbb 995 kfree(copy_path);
2503a0db
PS
996 free_rsp_buf(resp_buftype, rsp);
997 return rc;
998}
999
1000int
1001SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1002 u64 persistent_fid, u64 volatile_fid)
1003{
1004 struct smb2_close_req *req;
1005 struct smb2_close_rsp *rsp;
1006 struct TCP_Server_Info *server;
1007 struct cifs_ses *ses = tcon->ses;
1008 struct kvec iov[1];
1009 int resp_buftype;
1010 int rc = 0;
1011
f96637be 1012 cifs_dbg(FYI, "Close\n");
2503a0db
PS
1013
1014 if (ses && (ses->server))
1015 server = ses->server;
1016 else
1017 return -EIO;
1018
1019 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1020 if (rc)
1021 return rc;
1022
1023 req->PersistentFileId = persistent_fid;
1024 req->VolatileFileId = volatile_fid;
1025
1026 iov[0].iov_base = (char *)req;
1027 /* 4 for rfc1002 length field */
1028 iov[0].iov_len = get_rfc1002_length(req) + 4;
1029
1030 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1031 rsp = (struct smb2_close_rsp *)iov[0].iov_base;
1032
1033 if (rc != 0) {
1034 if (tcon)
1035 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
1036 goto close_exit;
1037 }
1038
2503a0db
PS
1039 /* BB FIXME - decode close response, update inode for caching */
1040
1041close_exit:
1042 free_rsp_buf(resp_buftype, rsp);
1043 return rc;
1044}
be4cb9e3
PS
1045
1046static int
1047validate_buf(unsigned int offset, unsigned int buffer_length,
1048 struct smb2_hdr *hdr, unsigned int min_buf_size)
1049
1050{
1051 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
1052 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
1053 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1054 char *end_of_buf = begin_of_buf + buffer_length;
1055
1056
1057 if (buffer_length < min_buf_size) {
f96637be
JP
1058 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
1059 buffer_length, min_buf_size);
be4cb9e3
PS
1060 return -EINVAL;
1061 }
1062
1063 /* check if beyond RFC1001 maximum length */
1064 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
f96637be
JP
1065 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
1066 buffer_length, smb_len);
be4cb9e3
PS
1067 return -EINVAL;
1068 }
1069
1070 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
f96637be 1071 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
be4cb9e3
PS
1072 return -EINVAL;
1073 }
1074
1075 return 0;
1076}
1077
1078/*
1079 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1080 * Caller must free buffer.
1081 */
1082static int
1083validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
1084 struct smb2_hdr *hdr, unsigned int minbufsize,
1085 char *data)
1086
1087{
1088 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1089 int rc;
1090
1091 if (!data)
1092 return -EINVAL;
1093
1094 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
1095 if (rc)
1096 return rc;
1097
1098 memcpy(data, begin_of_buf, buffer_length);
1099
1100 return 0;
1101}
1102
f0df737e
PS
1103static int
1104query_info(const unsigned int xid, struct cifs_tcon *tcon,
1105 u64 persistent_fid, u64 volatile_fid, u8 info_class,
1106 size_t output_len, size_t min_len, void *data)
be4cb9e3
PS
1107{
1108 struct smb2_query_info_req *req;
1109 struct smb2_query_info_rsp *rsp = NULL;
1110 struct kvec iov[2];
1111 int rc = 0;
1112 int resp_buftype;
1113 struct TCP_Server_Info *server;
1114 struct cifs_ses *ses = tcon->ses;
1115
f96637be 1116 cifs_dbg(FYI, "Query Info\n");
be4cb9e3
PS
1117
1118 if (ses && (ses->server))
1119 server = ses->server;
1120 else
1121 return -EIO;
1122
1123 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
1124 if (rc)
1125 return rc;
1126
1127 req->InfoType = SMB2_O_INFO_FILE;
f0df737e 1128 req->FileInfoClass = info_class;
be4cb9e3
PS
1129 req->PersistentFileId = persistent_fid;
1130 req->VolatileFileId = volatile_fid;
1131 /* 4 for rfc1002 length field and 1 for Buffer */
1132 req->InputBufferOffset =
1133 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
f0df737e 1134 req->OutputBufferLength = cpu_to_le32(output_len);
be4cb9e3
PS
1135
1136 iov[0].iov_base = (char *)req;
1137 /* 4 for rfc1002 length field */
1138 iov[0].iov_len = get_rfc1002_length(req) + 4;
1139
1140 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
e5d04887
PS
1141 rsp = (struct smb2_query_info_rsp *)iov[0].iov_base;
1142
be4cb9e3
PS
1143 if (rc) {
1144 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
1145 goto qinf_exit;
1146 }
1147
be4cb9e3
PS
1148 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
1149 le32_to_cpu(rsp->OutputBufferLength),
f0df737e 1150 &rsp->hdr, min_len, data);
be4cb9e3
PS
1151
1152qinf_exit:
1153 free_rsp_buf(resp_buftype, rsp);
1154 return rc;
1155}
9094fad1 1156
f0df737e
PS
1157int
1158SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
1159 u64 persistent_fid, u64 volatile_fid,
1160 struct smb2_file_all_info *data)
1161{
1162 return query_info(xid, tcon, persistent_fid, volatile_fid,
1163 FILE_ALL_INFORMATION,
1164 sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
1165 sizeof(struct smb2_file_all_info), data);
1166}
1167
1168int
1169SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
1170 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
1171{
1172 return query_info(xid, tcon, persistent_fid, volatile_fid,
1173 FILE_INTERNAL_INFORMATION,
1174 sizeof(struct smb2_file_internal_info),
1175 sizeof(struct smb2_file_internal_info), uniqueid);
1176}
1177
9094fad1
PS
1178/*
1179 * This is a no-op for now. We're not really interested in the reply, but
1180 * rather in the fact that the server sent one and that server->lstrp
1181 * gets updated.
1182 *
1183 * FIXME: maybe we should consider checking that the reply matches request?
1184 */
1185static void
1186smb2_echo_callback(struct mid_q_entry *mid)
1187{
1188 struct TCP_Server_Info *server = mid->callback_data;
1189 struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf;
1190 unsigned int credits_received = 1;
1191
1192 if (mid->mid_state == MID_RESPONSE_RECEIVED)
1193 credits_received = le16_to_cpu(smb2->hdr.CreditRequest);
1194
1195 DeleteMidQEntry(mid);
1196 add_credits(server, credits_received, CIFS_ECHO_OP);
1197}
1198
1199int
1200SMB2_echo(struct TCP_Server_Info *server)
1201{
1202 struct smb2_echo_req *req;
1203 int rc = 0;
1204 struct kvec iov;
fec344e3
JL
1205 struct smb_rqst rqst = { .rq_iov = &iov,
1206 .rq_nvec = 1 };
9094fad1 1207
f96637be 1208 cifs_dbg(FYI, "In echo request\n");
9094fad1
PS
1209
1210 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
1211 if (rc)
1212 return rc;
1213
1214 req->hdr.CreditRequest = cpu_to_le16(1);
1215
1216 iov.iov_base = (char *)req;
1217 /* 4 for rfc1002 length field */
1218 iov.iov_len = get_rfc1002_length(req) + 4;
1219
fec344e3 1220 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server,
9094fad1
PS
1221 CIFS_ECHO_OP);
1222 if (rc)
f96637be 1223 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
9094fad1
PS
1224
1225 cifs_small_buf_release(req);
1226 return rc;
1227}
7a5cfb19
PS
1228
1229int
1230SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1231 u64 volatile_fid)
1232{
1233 struct smb2_flush_req *req;
1234 struct TCP_Server_Info *server;
1235 struct cifs_ses *ses = tcon->ses;
1236 struct kvec iov[1];
1237 int resp_buftype;
1238 int rc = 0;
1239
f96637be 1240 cifs_dbg(FYI, "Flush\n");
7a5cfb19
PS
1241
1242 if (ses && (ses->server))
1243 server = ses->server;
1244 else
1245 return -EIO;
1246
1247 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
1248 if (rc)
1249 return rc;
1250
1251 req->PersistentFileId = persistent_fid;
1252 req->VolatileFileId = volatile_fid;
1253
1254 iov[0].iov_base = (char *)req;
1255 /* 4 for rfc1002 length field */
1256 iov[0].iov_len = get_rfc1002_length(req) + 4;
1257
1258 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1259
1260 if ((rc != 0) && tcon)
1261 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
1262
1263 free_rsp_buf(resp_buftype, iov[0].iov_base);
1264 return rc;
1265}
09a4707e
PS
1266
1267/*
1268 * To form a chain of read requests, any read requests after the first should
1269 * have the end_of_chain boolean set to true.
1270 */
1271static int
1272smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms,
1273 unsigned int remaining_bytes, int request_type)
1274{
1275 int rc = -EACCES;
1276 struct smb2_read_req *req = NULL;
1277
1278 rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req);
1279 if (rc)
1280 return rc;
1281 if (io_parms->tcon->ses->server == NULL)
1282 return -ECONNABORTED;
1283
1284 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1285
1286 req->PersistentFileId = io_parms->persistent_fid;
1287 req->VolatileFileId = io_parms->volatile_fid;
1288 req->ReadChannelInfoOffset = 0; /* reserved */
1289 req->ReadChannelInfoLength = 0; /* reserved */
1290 req->Channel = 0; /* reserved */
1291 req->MinimumCount = 0;
1292 req->Length = cpu_to_le32(io_parms->length);
1293 req->Offset = cpu_to_le64(io_parms->offset);
1294
1295 if (request_type & CHAINED_REQUEST) {
1296 if (!(request_type & END_OF_CHAIN)) {
1297 /* 4 for rfc1002 length field */
1298 req->hdr.NextCommand =
1299 cpu_to_le32(get_rfc1002_length(req) + 4);
1300 } else /* END_OF_CHAIN */
1301 req->hdr.NextCommand = 0;
1302 if (request_type & RELATED_REQUEST) {
1303 req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
1304 /*
1305 * Related requests use info from previous read request
1306 * in chain.
1307 */
1308 req->hdr.SessionId = 0xFFFFFFFF;
1309 req->hdr.TreeId = 0xFFFFFFFF;
1310 req->PersistentFileId = 0xFFFFFFFF;
1311 req->VolatileFileId = 0xFFFFFFFF;
1312 }
1313 }
1314 if (remaining_bytes > io_parms->length)
1315 req->RemainingBytes = cpu_to_le32(remaining_bytes);
1316 else
1317 req->RemainingBytes = 0;
1318
1319 iov[0].iov_base = (char *)req;
1320 /* 4 for rfc1002 length field */
1321 iov[0].iov_len = get_rfc1002_length(req) + 4;
1322 return rc;
1323}
1324
1325static void
1326smb2_readv_callback(struct mid_q_entry *mid)
1327{
1328 struct cifs_readdata *rdata = mid->callback_data;
1329 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
1330 struct TCP_Server_Info *server = tcon->ses->server;
5819575e 1331 struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base;
09a4707e 1332 unsigned int credits_received = 1;
5819575e 1333 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
8321fec4
JL
1334 .rq_nvec = 1,
1335 .rq_pages = rdata->pages,
1336 .rq_npages = rdata->nr_pages,
1337 .rq_pagesz = rdata->pagesz,
1338 .rq_tailsz = rdata->tailsz };
09a4707e 1339
f96637be
JP
1340 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1341 __func__, mid->mid, mid->mid_state, rdata->result,
1342 rdata->bytes);
09a4707e
PS
1343
1344 switch (mid->mid_state) {
1345 case MID_RESPONSE_RECEIVED:
1346 credits_received = le16_to_cpu(buf->CreditRequest);
1347 /* result already set, check signature */
38d77c50 1348 if (server->sign) {
3c1bf7e4
PS
1349 int rc;
1350
0b688cfc 1351 rc = smb2_verify_signature(&rqst, server);
3c1bf7e4 1352 if (rc)
f96637be
JP
1353 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
1354 rc);
3c1bf7e4 1355 }
09a4707e
PS
1356 /* FIXME: should this be counted toward the initiating task? */
1357 task_io_account_read(rdata->bytes);
1358 cifs_stats_bytes_read(tcon, rdata->bytes);
1359 break;
1360 case MID_REQUEST_SUBMITTED:
1361 case MID_RETRY_NEEDED:
1362 rdata->result = -EAGAIN;
1363 break;
1364 default:
1365 if (rdata->result != -ENODATA)
1366 rdata->result = -EIO;
1367 }
1368
1369 if (rdata->result)
1370 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
1371
1372 queue_work(cifsiod_wq, &rdata->work);
1373 DeleteMidQEntry(mid);
1374 add_credits(server, credits_received, 0);
1375}
1376
1377/* smb2_async_readv - send an async write, and set up mid to handle result */
1378int
1379smb2_async_readv(struct cifs_readdata *rdata)
1380{
1381 int rc;
1382 struct smb2_hdr *buf;
1383 struct cifs_io_parms io_parms;
5819575e 1384 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
fec344e3 1385 .rq_nvec = 1 };
09a4707e 1386
f96637be
JP
1387 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
1388 __func__, rdata->offset, rdata->bytes);
09a4707e
PS
1389
1390 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
1391 io_parms.offset = rdata->offset;
1392 io_parms.length = rdata->bytes;
1393 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
1394 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
1395 io_parms.pid = rdata->pid;
5819575e 1396 rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0);
09a4707e
PS
1397 if (rc)
1398 return rc;
1399
5819575e 1400 buf = (struct smb2_hdr *)rdata->iov.iov_base;
09a4707e 1401 /* 4 for rfc1002 length field */
5819575e 1402 rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4;
09a4707e
PS
1403
1404 kref_get(&rdata->refcount);
fec344e3 1405 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
09a4707e
PS
1406 cifs_readv_receive, smb2_readv_callback,
1407 rdata, 0);
e5d04887 1408 if (rc) {
09a4707e 1409 kref_put(&rdata->refcount, cifs_readdata_release);
e5d04887
PS
1410 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
1411 }
09a4707e
PS
1412
1413 cifs_small_buf_release(buf);
1414 return rc;
1415}
33319141 1416
d8e05039
PS
1417int
1418SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
1419 unsigned int *nbytes, char **buf, int *buf_type)
1420{
1421 int resp_buftype, rc = -EACCES;
1422 struct smb2_read_rsp *rsp = NULL;
1423 struct kvec iov[1];
1424
1425 *nbytes = 0;
1426 rc = smb2_new_read_req(iov, io_parms, 0, 0);
1427 if (rc)
1428 return rc;
1429
1430 rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1,
1431 &resp_buftype, CIFS_LOG_ERROR);
1432
1433 rsp = (struct smb2_read_rsp *)iov[0].iov_base;
1434
1435 if (rsp->hdr.Status == STATUS_END_OF_FILE) {
1436 free_rsp_buf(resp_buftype, iov[0].iov_base);
1437 return 0;
1438 }
1439
1440 if (rc) {
1441 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
f96637be 1442 cifs_dbg(VFS, "Send error in read = %d\n", rc);
d8e05039
PS
1443 } else {
1444 *nbytes = le32_to_cpu(rsp->DataLength);
1445 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
1446 (*nbytes > io_parms->length)) {
f96637be
JP
1447 cifs_dbg(FYI, "bad length %d for count %d\n",
1448 *nbytes, io_parms->length);
d8e05039
PS
1449 rc = -EIO;
1450 *nbytes = 0;
1451 }
1452 }
1453
1454 if (*buf) {
1455 memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset,
1456 *nbytes);
1457 free_rsp_buf(resp_buftype, iov[0].iov_base);
1458 } else if (resp_buftype != CIFS_NO_BUFFER) {
1459 *buf = iov[0].iov_base;
1460 if (resp_buftype == CIFS_SMALL_BUFFER)
1461 *buf_type = CIFS_SMALL_BUFFER;
1462 else if (resp_buftype == CIFS_LARGE_BUFFER)
1463 *buf_type = CIFS_LARGE_BUFFER;
1464 }
1465 return rc;
1466}
1467
33319141
PS
1468/*
1469 * Check the mid_state and signature on received buffer (if any), and queue the
1470 * workqueue completion task.
1471 */
1472static void
1473smb2_writev_callback(struct mid_q_entry *mid)
1474{
1475 struct cifs_writedata *wdata = mid->callback_data;
1476 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1477 unsigned int written;
1478 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
1479 unsigned int credits_received = 1;
1480
1481 switch (mid->mid_state) {
1482 case MID_RESPONSE_RECEIVED:
1483 credits_received = le16_to_cpu(rsp->hdr.CreditRequest);
1484 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
1485 if (wdata->result != 0)
1486 break;
1487
1488 written = le32_to_cpu(rsp->DataLength);
1489 /*
1490 * Mask off high 16 bits when bytes written as returned
1491 * by the server is greater than bytes requested by the
1492 * client. OS/2 servers are known to set incorrect
1493 * CountHigh values.
1494 */
1495 if (written > wdata->bytes)
1496 written &= 0xFFFF;
1497
1498 if (written < wdata->bytes)
1499 wdata->result = -ENOSPC;
1500 else
1501 wdata->bytes = written;
1502 break;
1503 case MID_REQUEST_SUBMITTED:
1504 case MID_RETRY_NEEDED:
1505 wdata->result = -EAGAIN;
1506 break;
1507 default:
1508 wdata->result = -EIO;
1509 break;
1510 }
1511
1512 if (wdata->result)
1513 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1514
1515 queue_work(cifsiod_wq, &wdata->work);
1516 DeleteMidQEntry(mid);
1517 add_credits(tcon->ses->server, credits_received, 0);
1518}
1519
1520/* smb2_async_writev - send an async write, and set up mid to handle result */
1521int
1522smb2_async_writev(struct cifs_writedata *wdata)
1523{
eddb079d 1524 int rc = -EACCES;
33319141
PS
1525 struct smb2_write_req *req = NULL;
1526 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
eddb079d 1527 struct kvec iov;
fec344e3 1528 struct smb_rqst rqst;
33319141
PS
1529
1530 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
1531 if (rc)
1532 goto async_writev_out;
1533
33319141
PS
1534 req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid);
1535
1536 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
1537 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
1538 req->WriteChannelInfoOffset = 0;
1539 req->WriteChannelInfoLength = 0;
1540 req->Channel = 0;
1541 req->Offset = cpu_to_le64(wdata->offset);
1542 /* 4 for rfc1002 length field */
1543 req->DataOffset = cpu_to_le16(
1544 offsetof(struct smb2_write_req, Buffer) - 4);
1545 req->RemainingBytes = 0;
1546
1547 /* 4 for rfc1002 length field and 1 for Buffer */
eddb079d
JL
1548 iov.iov_len = get_rfc1002_length(req) + 4 - 1;
1549 iov.iov_base = req;
33319141 1550
eddb079d
JL
1551 rqst.rq_iov = &iov;
1552 rqst.rq_nvec = 1;
1553 rqst.rq_pages = wdata->pages;
1554 rqst.rq_npages = wdata->nr_pages;
1555 rqst.rq_pagesz = wdata->pagesz;
1556 rqst.rq_tailsz = wdata->tailsz;
33319141 1557
f96637be
JP
1558 cifs_dbg(FYI, "async write at %llu %u bytes\n",
1559 wdata->offset, wdata->bytes);
33319141
PS
1560
1561 req->Length = cpu_to_le32(wdata->bytes);
1562
1563 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
1564
1565 kref_get(&wdata->refcount);
fec344e3
JL
1566 rc = cifs_call_async(tcon->ses->server, &rqst, NULL,
1567 smb2_writev_callback, wdata, 0);
33319141 1568
e5d04887 1569 if (rc) {
33319141 1570 kref_put(&wdata->refcount, cifs_writedata_release);
e5d04887
PS
1571 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1572 }
33319141 1573
33319141
PS
1574async_writev_out:
1575 cifs_small_buf_release(req);
33319141
PS
1576 return rc;
1577}
009d3443
PS
1578
1579/*
1580 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1581 * The length field from io_parms must be at least 1 and indicates a number of
1582 * elements with data to write that begins with position 1 in iov array. All
1583 * data length is specified by count.
1584 */
1585int
1586SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
1587 unsigned int *nbytes, struct kvec *iov, int n_vec)
1588{
1589 int rc = 0;
1590 struct smb2_write_req *req = NULL;
1591 struct smb2_write_rsp *rsp = NULL;
1592 int resp_buftype;
1593 *nbytes = 0;
1594
1595 if (n_vec < 1)
1596 return rc;
1597
1598 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
1599 if (rc)
1600 return rc;
1601
1602 if (io_parms->tcon->ses->server == NULL)
1603 return -ECONNABORTED;
1604
1605 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1606
1607 req->PersistentFileId = io_parms->persistent_fid;
1608 req->VolatileFileId = io_parms->volatile_fid;
1609 req->WriteChannelInfoOffset = 0;
1610 req->WriteChannelInfoLength = 0;
1611 req->Channel = 0;
1612 req->Length = cpu_to_le32(io_parms->length);
1613 req->Offset = cpu_to_le64(io_parms->offset);
1614 /* 4 for rfc1002 length field */
1615 req->DataOffset = cpu_to_le16(
1616 offsetof(struct smb2_write_req, Buffer) - 4);
1617 req->RemainingBytes = 0;
1618
1619 iov[0].iov_base = (char *)req;
1620 /* 4 for rfc1002 length field and 1 for Buffer */
1621 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1622
1623 /* length of entire message including data to be written */
1624 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
1625
1626 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
1627 &resp_buftype, 0);
e5d04887 1628 rsp = (struct smb2_write_rsp *)iov[0].iov_base;
009d3443
PS
1629
1630 if (rc) {
1631 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
f96637be 1632 cifs_dbg(VFS, "Send error in write = %d\n", rc);
e5d04887 1633 } else
009d3443 1634 *nbytes = le32_to_cpu(rsp->DataLength);
e5d04887
PS
1635
1636 free_rsp_buf(resp_buftype, rsp);
009d3443
PS
1637 return rc;
1638}
35143eb5 1639
d324f08d
PS
1640static unsigned int
1641num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
1642{
1643 int len;
1644 unsigned int entrycount = 0;
1645 unsigned int next_offset = 0;
1646 FILE_DIRECTORY_INFO *entryptr;
1647
1648 if (bufstart == NULL)
1649 return 0;
1650
1651 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
1652
1653 while (1) {
1654 entryptr = (FILE_DIRECTORY_INFO *)
1655 ((char *)entryptr + next_offset);
1656
1657 if ((char *)entryptr + size > end_of_buf) {
f96637be 1658 cifs_dbg(VFS, "malformed search entry would overflow\n");
d324f08d
PS
1659 break;
1660 }
1661
1662 len = le32_to_cpu(entryptr->FileNameLength);
1663 if ((char *)entryptr + len + size > end_of_buf) {
f96637be
JP
1664 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
1665 end_of_buf);
d324f08d
PS
1666 break;
1667 }
1668
1669 *lastentry = (char *)entryptr;
1670 entrycount++;
1671
1672 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
1673 if (!next_offset)
1674 break;
1675 }
1676
1677 return entrycount;
1678}
1679
1680/*
1681 * Readdir/FindFirst
1682 */
1683int
1684SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
1685 u64 persistent_fid, u64 volatile_fid, int index,
1686 struct cifs_search_info *srch_inf)
1687{
1688 struct smb2_query_directory_req *req;
1689 struct smb2_query_directory_rsp *rsp = NULL;
1690 struct kvec iov[2];
1691 int rc = 0;
1692 int len;
1693 int resp_buftype;
1694 unsigned char *bufptr;
1695 struct TCP_Server_Info *server;
1696 struct cifs_ses *ses = tcon->ses;
1697 __le16 asteriks = cpu_to_le16('*');
1698 char *end_of_smb;
1699 unsigned int output_size = CIFSMaxBufSize;
1700 size_t info_buf_size;
1701
1702 if (ses && (ses->server))
1703 server = ses->server;
1704 else
1705 return -EIO;
1706
1707 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
1708 if (rc)
1709 return rc;
1710
1711 switch (srch_inf->info_level) {
1712 case SMB_FIND_FILE_DIRECTORY_INFO:
1713 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
1714 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
1715 break;
1716 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
1717 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
1718 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
1719 break;
1720 default:
f96637be
JP
1721 cifs_dbg(VFS, "info level %u isn't supported\n",
1722 srch_inf->info_level);
d324f08d
PS
1723 rc = -EINVAL;
1724 goto qdir_exit;
1725 }
1726
1727 req->FileIndex = cpu_to_le32(index);
1728 req->PersistentFileId = persistent_fid;
1729 req->VolatileFileId = volatile_fid;
1730
1731 len = 0x2;
1732 bufptr = req->Buffer;
1733 memcpy(bufptr, &asteriks, len);
1734
1735 req->FileNameOffset =
1736 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
1737 req->FileNameLength = cpu_to_le16(len);
1738 /*
1739 * BB could be 30 bytes or so longer if we used SMB2 specific
1740 * buffer lengths, but this is safe and close enough.
1741 */
1742 output_size = min_t(unsigned int, output_size, server->maxBuf);
1743 output_size = min_t(unsigned int, output_size, 2 << 15);
1744 req->OutputBufferLength = cpu_to_le32(output_size);
1745
1746 iov[0].iov_base = (char *)req;
1747 /* 4 for RFC1001 length and 1 for Buffer */
1748 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1749
1750 iov[1].iov_base = (char *)(req->Buffer);
1751 iov[1].iov_len = len;
1752
1753 inc_rfc1001_len(req, len - 1 /* Buffer */);
1754
1755 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
e5d04887
PS
1756 rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base;
1757
d324f08d
PS
1758 if (rc) {
1759 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
1760 goto qdir_exit;
1761 }
d324f08d
PS
1762
1763 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
1764 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
1765 info_buf_size);
1766 if (rc)
1767 goto qdir_exit;
1768
1769 srch_inf->unicode = true;
1770
1771 if (srch_inf->ntwrk_buf_start) {
1772 if (srch_inf->smallBuf)
1773 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
1774 else
1775 cifs_buf_release(srch_inf->ntwrk_buf_start);
1776 }
1777 srch_inf->ntwrk_buf_start = (char *)rsp;
1778 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
1779 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
1780 /* 4 for rfc1002 length field */
1781 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
1782 srch_inf->entries_in_buffer =
1783 num_entries(srch_inf->srch_entries_start, end_of_smb,
1784 &srch_inf->last_entry, info_buf_size);
1785 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
f96637be
JP
1786 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
1787 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
1788 srch_inf->srch_entries_start, srch_inf->last_entry);
d324f08d
PS
1789 if (resp_buftype == CIFS_LARGE_BUFFER)
1790 srch_inf->smallBuf = false;
1791 else if (resp_buftype == CIFS_SMALL_BUFFER)
1792 srch_inf->smallBuf = true;
1793 else
f96637be 1794 cifs_dbg(VFS, "illegal search buffer type\n");
d324f08d
PS
1795
1796 if (rsp->hdr.Status == STATUS_NO_MORE_FILES)
1797 srch_inf->endOfSearch = 1;
1798 else
1799 srch_inf->endOfSearch = 0;
1800
1801 return rc;
1802
1803qdir_exit:
1804 free_rsp_buf(resp_buftype, rsp);
1805 return rc;
1806}
1807
35143eb5
PS
1808static int
1809send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
c839ff24 1810 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
35143eb5
PS
1811 unsigned int num, void **data, unsigned int *size)
1812{
1813 struct smb2_set_info_req *req;
1814 struct smb2_set_info_rsp *rsp = NULL;
1815 struct kvec *iov;
1816 int rc = 0;
1817 int resp_buftype;
1818 unsigned int i;
1819 struct TCP_Server_Info *server;
1820 struct cifs_ses *ses = tcon->ses;
1821
1822 if (ses && (ses->server))
1823 server = ses->server;
1824 else
1825 return -EIO;
1826
1827 if (!num)
1828 return -EINVAL;
1829
1830 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
1831 if (!iov)
1832 return -ENOMEM;
1833
1834 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
1835 if (rc) {
1836 kfree(iov);
1837 return rc;
1838 }
1839
c839ff24
PS
1840 req->hdr.ProcessId = cpu_to_le32(pid);
1841
35143eb5
PS
1842 req->InfoType = SMB2_O_INFO_FILE;
1843 req->FileInfoClass = info_class;
1844 req->PersistentFileId = persistent_fid;
1845 req->VolatileFileId = volatile_fid;
1846
1847 /* 4 for RFC1001 length and 1 for Buffer */
1848 req->BufferOffset =
1849 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
1850 req->BufferLength = cpu_to_le32(*size);
1851
1852 inc_rfc1001_len(req, *size - 1 /* Buffer */);
1853
1854 memcpy(req->Buffer, *data, *size);
1855
1856 iov[0].iov_base = (char *)req;
1857 /* 4 for RFC1001 length */
1858 iov[0].iov_len = get_rfc1002_length(req) + 4;
1859
1860 for (i = 1; i < num; i++) {
1861 inc_rfc1001_len(req, size[i]);
1862 le32_add_cpu(&req->BufferLength, size[i]);
1863 iov[i].iov_base = (char *)data[i];
1864 iov[i].iov_len = size[i];
1865 }
1866
1867 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0);
1868 rsp = (struct smb2_set_info_rsp *)iov[0].iov_base;
1869
1870 if (rc != 0) {
1871 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
1872 goto out;
1873 }
35143eb5
PS
1874out:
1875 free_rsp_buf(resp_buftype, rsp);
1876 kfree(iov);
1877 return rc;
1878}
1879
1880int
1881SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
1882 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
1883{
1884 struct smb2_file_rename_info info;
1885 void **data;
1886 unsigned int size[2];
1887 int rc;
1888 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
1889
1890 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
1891 if (!data)
1892 return -ENOMEM;
1893
1894 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
1895 /* 0 = fail if target already exists */
1896 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
1897 info.FileNameLength = cpu_to_le32(len);
1898
1899 data[0] = &info;
1900 size[0] = sizeof(struct smb2_file_rename_info);
1901
1902 data[1] = target_file;
1903 size[1] = len + 2 /* null */;
1904
1905 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
c839ff24
PS
1906 current->tgid, FILE_RENAME_INFORMATION, 2, data,
1907 size);
35143eb5
PS
1908 kfree(data);
1909 return rc;
1910}
568798cc
PS
1911
1912int
1913SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
1914 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
1915{
1916 struct smb2_file_link_info info;
1917 void **data;
1918 unsigned int size[2];
1919 int rc;
1920 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
1921
1922 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
1923 if (!data)
1924 return -ENOMEM;
1925
1926 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
1927 /* 0 = fail if link already exists */
1928 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
1929 info.FileNameLength = cpu_to_le32(len);
1930
1931 data[0] = &info;
1932 size[0] = sizeof(struct smb2_file_link_info);
1933
1934 data[1] = target_file;
1935 size[1] = len + 2 /* null */;
1936
1937 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
c839ff24 1938 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
568798cc
PS
1939 kfree(data);
1940 return rc;
1941}
c839ff24
PS
1942
1943int
1944SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1945 u64 volatile_fid, u32 pid, __le64 *eof)
1946{
1947 struct smb2_file_eof_info info;
1948 void *data;
1949 unsigned int size;
1950
1951 info.EndOfFile = *eof;
1952
1953 data = &info;
1954 size = sizeof(struct smb2_file_eof_info);
1955
1956 return send_set_info(xid, tcon, persistent_fid, volatile_fid, pid,
1957 FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
1958}
1feeaac7
PS
1959
1960int
1961SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
1962 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
1963{
1964 unsigned int size;
1965 size = sizeof(FILE_BASIC_INFO);
1966 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
1967 current->tgid, FILE_BASIC_INFORMATION, 1,
1968 (void **)&buf, &size);
1969}
983c88a4
PS
1970
1971int
1972SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
1973 const u64 persistent_fid, const u64 volatile_fid,
1974 __u8 oplock_level)
1975{
1976 int rc;
1977 struct smb2_oplock_break *req = NULL;
1978
f96637be 1979 cifs_dbg(FYI, "SMB2_oplock_break\n");
983c88a4
PS
1980 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
1981
1982 if (rc)
1983 return rc;
1984
1985 req->VolatileFid = volatile_fid;
1986 req->PersistentFid = persistent_fid;
1987 req->OplockLevel = oplock_level;
1988 req->hdr.CreditRequest = cpu_to_le16(1);
1989
1990 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
1991 /* SMB2 buffer freed by function above */
1992
1993 if (rc) {
1994 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 1995 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
983c88a4
PS
1996 }
1997
1998 return rc;
1999}
6fc05c25
PS
2000
2001static void
2002copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
2003 struct kstatfs *kst)
2004{
2005 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
2006 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
2007 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
2008 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
2009 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
2010 return;
2011}
2012
2013static int
2014build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
2015 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
2016{
2017 int rc;
2018 struct smb2_query_info_req *req;
2019
f96637be 2020 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
6fc05c25
PS
2021
2022 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
2023 return -EIO;
2024
2025 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2026 if (rc)
2027 return rc;
2028
2029 req->InfoType = SMB2_O_INFO_FILESYSTEM;
2030 req->FileInfoClass = level;
2031 req->PersistentFileId = persistent_fid;
2032 req->VolatileFileId = volatile_fid;
2033 /* 4 for rfc1002 length field and 1 for pad */
2034 req->InputBufferOffset =
2035 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
2036 req->OutputBufferLength = cpu_to_le32(
2037 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
2038
2039 iov->iov_base = (char *)req;
2040 /* 4 for rfc1002 length field */
2041 iov->iov_len = get_rfc1002_length(req) + 4;
2042 return 0;
2043}
2044
2045int
2046SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
2047 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
2048{
2049 struct smb2_query_info_rsp *rsp = NULL;
2050 struct kvec iov;
2051 int rc = 0;
2052 int resp_buftype;
2053 struct cifs_ses *ses = tcon->ses;
2054 struct smb2_fs_full_size_info *info = NULL;
2055
2056 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
2057 sizeof(struct smb2_fs_full_size_info),
2058 persistent_fid, volatile_fid);
2059 if (rc)
2060 return rc;
2061
2062 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2063 if (rc) {
2064 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2065 goto qinf_exit;
2066 }
2067 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2068
2069 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
2070 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
2071 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2072 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2073 sizeof(struct smb2_fs_full_size_info));
2074 if (!rc)
2075 copy_fs_info_to_kstatfs(info, fsdata);
2076
2077qinf_exit:
2078 free_rsp_buf(resp_buftype, iov.iov_base);
2079 return rc;
2080}
f7ba7fe6
PS
2081
2082int
2083smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
2084 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2085 const __u32 num_lock, struct smb2_lock_element *buf)
2086{
2087 int rc = 0;
2088 struct smb2_lock_req *req = NULL;
2089 struct kvec iov[2];
2090 int resp_buf_type;
2091 unsigned int count;
2092
f96637be 2093 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
f7ba7fe6
PS
2094
2095 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
2096 if (rc)
2097 return rc;
2098
2099 req->hdr.ProcessId = cpu_to_le32(pid);
2100 req->LockCount = cpu_to_le16(num_lock);
2101
2102 req->PersistentFileId = persist_fid;
2103 req->VolatileFileId = volatile_fid;
2104
2105 count = num_lock * sizeof(struct smb2_lock_element);
2106 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
2107
2108 iov[0].iov_base = (char *)req;
2109 /* 4 for rfc1002 length field and count for all locks */
2110 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
2111 iov[1].iov_base = (char *)buf;
2112 iov[1].iov_len = count;
2113
2114 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
2115 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP);
2116 if (rc) {
f96637be 2117 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
f7ba7fe6
PS
2118 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
2119 }
2120
2121 return rc;
2122}
2123
2124int
2125SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
2126 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2127 const __u64 length, const __u64 offset, const __u32 lock_flags,
2128 const bool wait)
2129{
2130 struct smb2_lock_element lock;
2131
2132 lock.Offset = cpu_to_le64(offset);
2133 lock.Length = cpu_to_le64(length);
2134 lock.Flags = cpu_to_le32(lock_flags);
2135 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
2136 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
2137
2138 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
2139}
0822f514
PS
2140
2141int
2142SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
2143 __u8 *lease_key, const __le32 lease_state)
2144{
2145 int rc;
2146 struct smb2_lease_ack *req = NULL;
2147
f96637be 2148 cifs_dbg(FYI, "SMB2_lease_break\n");
0822f514
PS
2149 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2150
2151 if (rc)
2152 return rc;
2153
2154 req->hdr.CreditRequest = cpu_to_le16(1);
2155 req->StructureSize = cpu_to_le16(36);
2156 inc_rfc1001_len(req, 12);
2157
2158 memcpy(req->LeaseKey, lease_key, 16);
2159 req->LeaseState = lease_state;
2160
2161 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2162 /* SMB2 buffer freed by function above */
2163
2164 if (rc) {
2165 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
f96637be 2166 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
0822f514
PS
2167 }
2168
2169 return rc;
2170}
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