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Merge tag 'v3.10.55' into update
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / cifs / smb2pdu.c
1 /*
2 * fs/cifs/smb2pdu.c
3 *
4 * Copyright (C) International Business Machines Corp., 2009, 2012
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>
34 #include <linux/task_io_accounting_ops.h>
35 #include <linux/uaccess.h>
36 #include <linux/pagemap.h>
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"
47 #include "smb2glob.h"
48 #include "cifspdu.h"
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 */
57 static 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
80 static void
81 smb2_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
111 hdr->TreeId = tcon->tid;
112 /* Uid is not converted */
113 if (tcon->ses)
114 hdr->SessionId = tcon->ses->Suid;
115 /* BB check following DFS flags BB */
116 /* BB do we have to add check for SHI1005_FLAGS_DFS_ROOT too? */
117 if (tcon->share_flags & SHI1005_FLAGS_DFS)
118 hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS;
119 /* BB how does SMB2 do case sensitive? */
120 /* if (tcon->nocase)
121 hdr->Flags |= SMBFLG_CASELESS; */
122 if (tcon->ses && tcon->ses->server &&
123 (tcon->ses->server->sec_mode & SECMODE_SIGN_REQUIRED))
124 hdr->Flags |= SMB2_FLAGS_SIGNED;
125 out:
126 pdu->StructureSize2 = cpu_to_le16(parmsize);
127 return;
128 }
129
130 static int
131 smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
132 {
133 int rc = 0;
134 struct nls_table *nls_codepage;
135 struct cifs_ses *ses;
136 struct TCP_Server_Info *server;
137
138 /*
139 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
140 * check for tcp and smb session status done differently
141 * for those three - in the calling routine.
142 */
143 if (tcon == NULL)
144 return rc;
145
146 if (smb2_command == SMB2_TREE_CONNECT)
147 return rc;
148
149 if (tcon->tidStatus == CifsExiting) {
150 /*
151 * only tree disconnect, open, and write,
152 * (and ulogoff which does not have tcon)
153 * are allowed as we start force umount.
154 */
155 if ((smb2_command != SMB2_WRITE) &&
156 (smb2_command != SMB2_CREATE) &&
157 (smb2_command != SMB2_TREE_DISCONNECT)) {
158 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
159 smb2_command);
160 return -ENODEV;
161 }
162 }
163 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
164 (!tcon->ses->server))
165 return -EIO;
166
167 ses = tcon->ses;
168 server = ses->server;
169
170 /*
171 * Give demultiplex thread up to 10 seconds to reconnect, should be
172 * greater than cifs socket timeout which is 7 seconds
173 */
174 while (server->tcpStatus == CifsNeedReconnect) {
175 /*
176 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
177 * here since they are implicitly done when session drops.
178 */
179 switch (smb2_command) {
180 /*
181 * BB Should we keep oplock break and add flush to exceptions?
182 */
183 case SMB2_TREE_DISCONNECT:
184 case SMB2_CANCEL:
185 case SMB2_CLOSE:
186 case SMB2_OPLOCK_BREAK:
187 return -EAGAIN;
188 }
189
190 wait_event_interruptible_timeout(server->response_q,
191 (server->tcpStatus != CifsNeedReconnect), 10 * HZ);
192
193 /* are we still trying to reconnect? */
194 if (server->tcpStatus != CifsNeedReconnect)
195 break;
196
197 /*
198 * on "soft" mounts we wait once. Hard mounts keep
199 * retrying until process is killed or server comes
200 * back on-line
201 */
202 if (!tcon->retry) {
203 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
204 return -EHOSTDOWN;
205 }
206 }
207
208 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
209 return rc;
210
211 nls_codepage = load_nls_default();
212
213 /*
214 * need to prevent multiple threads trying to simultaneously reconnect
215 * the same SMB session
216 */
217 mutex_lock(&tcon->ses->session_mutex);
218 rc = cifs_negotiate_protocol(0, tcon->ses);
219 if (!rc && tcon->ses->need_reconnect)
220 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
221
222 if (rc || !tcon->need_reconnect) {
223 mutex_unlock(&tcon->ses->session_mutex);
224 goto out;
225 }
226
227 cifs_mark_open_files_invalid(tcon);
228 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
229 mutex_unlock(&tcon->ses->session_mutex);
230 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
231 if (rc)
232 goto out;
233 atomic_inc(&tconInfoReconnectCount);
234 /*
235 * BB FIXME add code to check if wsize needs update due to negotiated
236 * smb buffer size shrinking.
237 */
238 out:
239 /*
240 * Check if handle based operation so we know whether we can continue
241 * or not without returning to caller to reset file handle.
242 */
243 /*
244 * BB Is flush done by server on drop of tcp session? Should we special
245 * case it and skip above?
246 */
247 switch (smb2_command) {
248 case SMB2_FLUSH:
249 case SMB2_READ:
250 case SMB2_WRITE:
251 case SMB2_LOCK:
252 case SMB2_IOCTL:
253 case SMB2_QUERY_DIRECTORY:
254 case SMB2_CHANGE_NOTIFY:
255 case SMB2_QUERY_INFO:
256 case SMB2_SET_INFO:
257 return -EAGAIN;
258 }
259 unload_nls(nls_codepage);
260 return rc;
261 }
262
263 /*
264 * Allocate and return pointer to an SMB request hdr, and set basic
265 * SMB information in the SMB header. If the return code is zero, this
266 * function must have filled in request_buf pointer.
267 */
268 static int
269 small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
270 void **request_buf)
271 {
272 int rc = 0;
273
274 rc = smb2_reconnect(smb2_command, tcon);
275 if (rc)
276 return rc;
277
278 /* BB eventually switch this to SMB2 specific small buf size */
279 *request_buf = cifs_small_buf_get();
280 if (*request_buf == NULL) {
281 /* BB should we add a retry in here if not a writepage? */
282 return -ENOMEM;
283 }
284
285 smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon);
286
287 if (tcon != NULL) {
288 #ifdef CONFIG_CIFS_STATS2
289 uint16_t com_code = le16_to_cpu(smb2_command);
290 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
291 #endif
292 cifs_stats_inc(&tcon->num_smbs_sent);
293 }
294
295 return rc;
296 }
297
298 static void
299 free_rsp_buf(int resp_buftype, void *rsp)
300 {
301 if (resp_buftype == CIFS_SMALL_BUFFER)
302 cifs_small_buf_release(rsp);
303 else if (resp_buftype == CIFS_LARGE_BUFFER)
304 cifs_buf_release(rsp);
305 }
306
307
308 /*
309 *
310 * SMB2 Worker functions follow:
311 *
312 * The general structure of the worker functions is:
313 * 1) Call smb2_init (assembles SMB2 header)
314 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
315 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
316 * 4) Decode SMB2 command specific fields in the fixed length area
317 * 5) Decode variable length data area (if any for this SMB2 command type)
318 * 6) Call free smb buffer
319 * 7) return
320 *
321 */
322
323 int
324 SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
325 {
326 struct smb2_negotiate_req *req;
327 struct smb2_negotiate_rsp *rsp;
328 struct kvec iov[1];
329 int rc = 0;
330 int resp_buftype;
331 struct TCP_Server_Info *server;
332 unsigned int sec_flags;
333 u16 temp = 0;
334 int blob_offset, blob_length;
335 char *security_blob;
336 int flags = CIFS_NEG_OP;
337
338 cifs_dbg(FYI, "Negotiate protocol\n");
339
340 if (ses->server)
341 server = ses->server;
342 else {
343 rc = -EIO;
344 return rc;
345 }
346
347 rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
348 if (rc)
349 return rc;
350
351 /* if any of auth flags (ie not sign or seal) are overriden use them */
352 if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
353 sec_flags = ses->overrideSecFlg; /* BB FIXME fix sign flags?*/
354 else /* if override flags set only sign/seal OR them with global auth */
355 sec_flags = global_secflags | ses->overrideSecFlg;
356
357 cifs_dbg(FYI, "sec_flags 0x%x\n", sec_flags);
358
359 req->hdr.SessionId = 0;
360
361 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
362
363 req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */
364 inc_rfc1001_len(req, 2);
365
366 /* only one of SMB2 signing flags may be set in SMB2 request */
367 if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN)
368 temp = SMB2_NEGOTIATE_SIGNING_REQUIRED;
369 else if (sec_flags & CIFSSEC_MAY_SIGN) /* MAY_SIGN is a single flag */
370 temp = SMB2_NEGOTIATE_SIGNING_ENABLED;
371
372 req->SecurityMode = cpu_to_le16(temp);
373
374 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
375
376 memcpy(req->ClientGUID, cifs_client_guid, SMB2_CLIENT_GUID_SIZE);
377
378 iov[0].iov_base = (char *)req;
379 /* 4 for rfc1002 length field */
380 iov[0].iov_len = get_rfc1002_length(req) + 4;
381
382 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags);
383
384 rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base;
385 /*
386 * No tcon so can't do
387 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
388 */
389 if (rc != 0)
390 goto neg_exit;
391
392 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
393
394 /* BB we may eventually want to match the negotiated vs. requested
395 dialect, even though we are only requesting one at a time */
396 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
397 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
398 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
399 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
400 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
401 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
402 else {
403 cifs_dbg(VFS, "Illegal dialect returned by server %d\n",
404 le16_to_cpu(rsp->DialectRevision));
405 rc = -EIO;
406 goto neg_exit;
407 }
408 server->dialect = le16_to_cpu(rsp->DialectRevision);
409
410 server->maxBuf = le32_to_cpu(rsp->MaxTransactSize);
411 /* set it to the maximum buffer size value we can send with 1 credit */
412 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
413 SMB2_MAX_BUFFER_SIZE);
414 server->max_read = le32_to_cpu(rsp->MaxReadSize);
415 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
416 /* BB Do we need to validate the SecurityMode? */
417 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
418 server->capabilities = le32_to_cpu(rsp->Capabilities);
419 /* Internal types */
420 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
421
422 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
423 &rsp->hdr);
424 if (blob_length == 0) {
425 cifs_dbg(VFS, "missing security blob on negprot\n");
426 rc = -EIO;
427 goto neg_exit;
428 }
429
430 cifs_dbg(FYI, "sec_flags 0x%x\n", sec_flags);
431 if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) {
432 cifs_dbg(FYI, "Signing required\n");
433 if (!(server->sec_mode & (SMB2_NEGOTIATE_SIGNING_REQUIRED |
434 SMB2_NEGOTIATE_SIGNING_ENABLED))) {
435 cifs_dbg(VFS, "signing required but server lacks support\n");
436 rc = -EOPNOTSUPP;
437 goto neg_exit;
438 }
439 server->sec_mode |= SECMODE_SIGN_REQUIRED;
440 } else if (sec_flags & CIFSSEC_MAY_SIGN) {
441 cifs_dbg(FYI, "Signing optional\n");
442 if (server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
443 cifs_dbg(FYI, "Server requires signing\n");
444 server->sec_mode |= SECMODE_SIGN_REQUIRED;
445 } else {
446 server->sec_mode &=
447 ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED);
448 }
449 } else {
450 cifs_dbg(FYI, "Signing disabled\n");
451 if (server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
452 cifs_dbg(VFS, "Server requires packet signing to be enabled in /proc/fs/cifs/SecurityFlags\n");
453 rc = -EOPNOTSUPP;
454 goto neg_exit;
455 }
456 server->sec_mode &=
457 ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED);
458 }
459
460 #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
461 rc = decode_neg_token_init(security_blob, blob_length,
462 &server->sec_type);
463 if (rc == 1)
464 rc = 0;
465 else if (rc == 0) {
466 rc = -EIO;
467 goto neg_exit;
468 }
469 #endif
470
471 neg_exit:
472 free_rsp_buf(resp_buftype, rsp);
473 return rc;
474 }
475
476 int
477 SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
478 const struct nls_table *nls_cp)
479 {
480 struct smb2_sess_setup_req *req;
481 struct smb2_sess_setup_rsp *rsp = NULL;
482 struct kvec iov[2];
483 int rc = 0;
484 int resp_buftype;
485 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
486 struct TCP_Server_Info *server;
487 unsigned int sec_flags;
488 u8 temp = 0;
489 u16 blob_length = 0;
490 char *security_blob;
491 char *ntlmssp_blob = NULL;
492 bool use_spnego = false; /* else use raw ntlmssp */
493
494 cifs_dbg(FYI, "Session Setup\n");
495
496 if (ses->server)
497 server = ses->server;
498 else {
499 rc = -EIO;
500 return rc;
501 }
502
503 /*
504 * If memory allocation is successful, caller of this function
505 * frees it.
506 */
507 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
508 if (!ses->ntlmssp)
509 return -ENOMEM;
510
511 ses->server->secType = RawNTLMSSP;
512
513 ssetup_ntlmssp_authenticate:
514 if (phase == NtLmChallenge)
515 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
516
517 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
518 if (rc)
519 return rc;
520
521 /* if any of auth flags (ie not sign or seal) are overriden use them */
522 if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
523 sec_flags = ses->overrideSecFlg; /* BB FIXME fix sign flags?*/
524 else /* if override flags set only sign/seal OR them with global auth */
525 sec_flags = global_secflags | ses->overrideSecFlg;
526
527 cifs_dbg(FYI, "sec_flags 0x%x\n", sec_flags);
528
529 req->hdr.SessionId = 0; /* First session, not a reauthenticate */
530 req->VcNumber = 0; /* MBZ */
531 /* to enable echos and oplocks */
532 req->hdr.CreditRequest = cpu_to_le16(3);
533
534 /* only one of SMB2 signing flags may be set in SMB2 request */
535 if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN)
536 temp = SMB2_NEGOTIATE_SIGNING_REQUIRED;
537 else if (ses->server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED)
538 temp = SMB2_NEGOTIATE_SIGNING_REQUIRED;
539 else if (sec_flags & CIFSSEC_MAY_SIGN) /* MAY_SIGN is a single flag */
540 temp = SMB2_NEGOTIATE_SIGNING_ENABLED;
541
542 req->SecurityMode = temp;
543 req->Capabilities = 0;
544 req->Channel = 0; /* MBZ */
545
546 iov[0].iov_base = (char *)req;
547 /* 4 for rfc1002 length field and 1 for pad */
548 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
549 if (phase == NtLmNegotiate) {
550 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
551 GFP_KERNEL);
552 if (ntlmssp_blob == NULL) {
553 rc = -ENOMEM;
554 goto ssetup_exit;
555 }
556 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
557 if (use_spnego) {
558 /* blob_length = build_spnego_ntlmssp_blob(
559 &security_blob,
560 sizeof(struct _NEGOTIATE_MESSAGE),
561 ntlmssp_blob); */
562 /* BB eventually need to add this */
563 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
564 rc = -EOPNOTSUPP;
565 kfree(ntlmssp_blob);
566 goto ssetup_exit;
567 } else {
568 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
569 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
570 security_blob = ntlmssp_blob;
571 }
572 } else if (phase == NtLmAuthenticate) {
573 req->hdr.SessionId = ses->Suid;
574 ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500,
575 GFP_KERNEL);
576 if (ntlmssp_blob == NULL) {
577 rc = -ENOMEM;
578 goto ssetup_exit;
579 }
580 rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses,
581 nls_cp);
582 if (rc) {
583 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n",
584 rc);
585 goto ssetup_exit; /* BB double check error handling */
586 }
587 if (use_spnego) {
588 /* blob_length = build_spnego_ntlmssp_blob(
589 &security_blob,
590 blob_length,
591 ntlmssp_blob); */
592 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
593 rc = -EOPNOTSUPP;
594 kfree(ntlmssp_blob);
595 goto ssetup_exit;
596 } else {
597 security_blob = ntlmssp_blob;
598 }
599 } else {
600 cifs_dbg(VFS, "illegal ntlmssp phase\n");
601 rc = -EIO;
602 goto ssetup_exit;
603 }
604
605 /* Testing shows that buffer offset must be at location of Buffer[0] */
606 req->SecurityBufferOffset =
607 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
608 1 /* pad */ - 4 /* rfc1001 len */);
609 req->SecurityBufferLength = cpu_to_le16(blob_length);
610 iov[1].iov_base = security_blob;
611 iov[1].iov_len = blob_length;
612
613 inc_rfc1001_len(req, blob_length - 1 /* pad */);
614
615 /* BB add code to build os and lm fields */
616
617 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype,
618 CIFS_LOG_ERROR | CIFS_NEG_OP);
619
620 kfree(security_blob);
621 rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base;
622 if (resp_buftype != CIFS_NO_BUFFER &&
623 rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) {
624 if (phase != NtLmNegotiate) {
625 cifs_dbg(VFS, "Unexpected more processing error\n");
626 goto ssetup_exit;
627 }
628 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
629 le16_to_cpu(rsp->SecurityBufferOffset)) {
630 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
631 le16_to_cpu(rsp->SecurityBufferOffset));
632 rc = -EIO;
633 goto ssetup_exit;
634 }
635
636 /* NTLMSSP Negotiate sent now processing challenge (response) */
637 phase = NtLmChallenge; /* process ntlmssp challenge */
638 rc = 0; /* MORE_PROCESSING is not an error here but expected */
639 ses->Suid = rsp->hdr.SessionId;
640 rc = decode_ntlmssp_challenge(rsp->Buffer,
641 le16_to_cpu(rsp->SecurityBufferLength), ses);
642 }
643
644 /*
645 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
646 * but at least the raw NTLMSSP case works.
647 */
648 /*
649 * No tcon so can't do
650 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
651 */
652 if (rc != 0)
653 goto ssetup_exit;
654
655 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
656 ssetup_exit:
657 free_rsp_buf(resp_buftype, rsp);
658
659 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
660 if ((phase == NtLmChallenge) && (rc == 0))
661 goto ssetup_ntlmssp_authenticate;
662 return rc;
663 }
664
665 int
666 SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
667 {
668 struct smb2_logoff_req *req; /* response is also trivial struct */
669 int rc = 0;
670 struct TCP_Server_Info *server;
671
672 cifs_dbg(FYI, "disconnect session %p\n", ses);
673
674 if (ses && (ses->server))
675 server = ses->server;
676 else
677 return -EIO;
678
679 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
680 if (rc)
681 return rc;
682
683 /* since no tcon, smb2_init can not do this, so do here */
684 req->hdr.SessionId = ses->Suid;
685 if (server->sec_mode & SECMODE_SIGN_REQUIRED)
686 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
687
688 rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0);
689 /*
690 * No tcon so can't do
691 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
692 */
693 return rc;
694 }
695
696 static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
697 {
698 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
699 }
700
701 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
702
703 int
704 SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
705 struct cifs_tcon *tcon, const struct nls_table *cp)
706 {
707 struct smb2_tree_connect_req *req;
708 struct smb2_tree_connect_rsp *rsp = NULL;
709 struct kvec iov[2];
710 int rc = 0;
711 int resp_buftype;
712 int unc_path_len;
713 struct TCP_Server_Info *server;
714 __le16 *unc_path = NULL;
715
716 cifs_dbg(FYI, "TCON\n");
717
718 if ((ses->server) && tree)
719 server = ses->server;
720 else
721 return -EIO;
722
723 if (tcon && tcon->bad_network_name)
724 return -ENOENT;
725
726 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
727 if (unc_path == NULL)
728 return -ENOMEM;
729
730 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
731 unc_path_len *= 2;
732 if (unc_path_len < 2) {
733 kfree(unc_path);
734 return -EINVAL;
735 }
736
737 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
738 if (rc) {
739 kfree(unc_path);
740 return rc;
741 }
742
743 if (tcon == NULL) {
744 /* since no tcon, smb2_init can not do this, so do here */
745 req->hdr.SessionId = ses->Suid;
746 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
747 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
748 }
749
750 iov[0].iov_base = (char *)req;
751 /* 4 for rfc1002 length field and 1 for pad */
752 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
753
754 /* Testing shows that buffer offset must be at location of Buffer[0] */
755 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
756 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
757 req->PathLength = cpu_to_le16(unc_path_len - 2);
758 iov[1].iov_base = unc_path;
759 iov[1].iov_len = unc_path_len;
760
761 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
762
763 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
764 rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base;
765
766 if (rc != 0) {
767 if (tcon) {
768 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
769 tcon->need_reconnect = true;
770 }
771 goto tcon_error_exit;
772 }
773
774 if (tcon == NULL) {
775 ses->ipc_tid = rsp->hdr.TreeId;
776 goto tcon_exit;
777 }
778
779 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
780 cifs_dbg(FYI, "connection to disk share\n");
781 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
782 tcon->ipc = true;
783 cifs_dbg(FYI, "connection to pipe share\n");
784 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
785 tcon->print = true;
786 cifs_dbg(FYI, "connection to printer\n");
787 } else {
788 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
789 rc = -EOPNOTSUPP;
790 goto tcon_error_exit;
791 }
792
793 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
794 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
795 tcon->tidStatus = CifsGood;
796 tcon->need_reconnect = false;
797 tcon->tid = rsp->hdr.TreeId;
798 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
799
800 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
801 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
802 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
803
804 tcon_exit:
805 free_rsp_buf(resp_buftype, rsp);
806 kfree(unc_path);
807 return rc;
808
809 tcon_error_exit:
810 if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) {
811 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
812 if (tcon)
813 tcon->bad_network_name = true;
814 }
815 goto tcon_exit;
816 }
817
818 int
819 SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
820 {
821 struct smb2_tree_disconnect_req *req; /* response is trivial */
822 int rc = 0;
823 struct TCP_Server_Info *server;
824 struct cifs_ses *ses = tcon->ses;
825
826 cifs_dbg(FYI, "Tree Disconnect\n");
827
828 if (ses && (ses->server))
829 server = ses->server;
830 else
831 return -EIO;
832
833 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
834 return 0;
835
836 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
837 if (rc)
838 return rc;
839
840 rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0);
841 if (rc)
842 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
843
844 return rc;
845 }
846
847 static struct create_lease *
848 create_lease_buf(u8 *lease_key, u8 oplock)
849 {
850 struct create_lease *buf;
851
852 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
853 if (!buf)
854 return NULL;
855
856 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
857 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
858 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
859 buf->lcontext.LeaseState = SMB2_LEASE_WRITE_CACHING |
860 SMB2_LEASE_READ_CACHING;
861 else if (oplock == SMB2_OPLOCK_LEVEL_II)
862 buf->lcontext.LeaseState = SMB2_LEASE_READ_CACHING;
863 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
864 buf->lcontext.LeaseState = SMB2_LEASE_HANDLE_CACHING |
865 SMB2_LEASE_READ_CACHING |
866 SMB2_LEASE_WRITE_CACHING;
867
868 buf->ccontext.DataOffset = cpu_to_le16(offsetof
869 (struct create_lease, lcontext));
870 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
871 buf->ccontext.NameOffset = cpu_to_le16(offsetof
872 (struct create_lease, Name));
873 buf->ccontext.NameLength = cpu_to_le16(4);
874 buf->Name[0] = 'R';
875 buf->Name[1] = 'q';
876 buf->Name[2] = 'L';
877 buf->Name[3] = 's';
878 return buf;
879 }
880
881 static __u8
882 parse_lease_state(struct smb2_create_rsp *rsp)
883 {
884 char *data_offset;
885 struct create_lease *lc;
886 bool found = false;
887
888 data_offset = (char *)rsp;
889 data_offset += 4 + le32_to_cpu(rsp->CreateContextsOffset);
890 lc = (struct create_lease *)data_offset;
891 do {
892 char *name = le16_to_cpu(lc->ccontext.NameOffset) + (char *)lc;
893 if (le16_to_cpu(lc->ccontext.NameLength) != 4 ||
894 strncmp(name, "RqLs", 4)) {
895 lc = (struct create_lease *)((char *)lc
896 + le32_to_cpu(lc->ccontext.Next));
897 continue;
898 }
899 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
900 return SMB2_OPLOCK_LEVEL_NOCHANGE;
901 found = true;
902 break;
903 } while (le32_to_cpu(lc->ccontext.Next) != 0);
904
905 if (!found)
906 return 0;
907
908 return smb2_map_lease_to_oplock(lc->lcontext.LeaseState);
909 }
910
911 int
912 SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path,
913 u64 *persistent_fid, u64 *volatile_fid, __u32 desired_access,
914 __u32 create_disposition, __u32 file_attributes, __u32 create_options,
915 __u8 *oplock, struct smb2_file_all_info *buf)
916 {
917 struct smb2_create_req *req;
918 struct smb2_create_rsp *rsp;
919 struct TCP_Server_Info *server;
920 struct cifs_ses *ses = tcon->ses;
921 struct kvec iov[3];
922 int resp_buftype;
923 int uni_path_len;
924 __le16 *copy_path = NULL;
925 int copy_size;
926 int rc = 0;
927 int num_iovecs = 2;
928
929 cifs_dbg(FYI, "create/open\n");
930
931 if (ses && (ses->server))
932 server = ses->server;
933 else
934 return -EIO;
935
936 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
937 if (rc)
938 return rc;
939
940 req->ImpersonationLevel = IL_IMPERSONATION;
941 req->DesiredAccess = cpu_to_le32(desired_access);
942 /* File attributes ignored on open (used in create though) */
943 req->FileAttributes = cpu_to_le32(file_attributes);
944 req->ShareAccess = FILE_SHARE_ALL_LE;
945 req->CreateDisposition = cpu_to_le32(create_disposition);
946 req->CreateOptions = cpu_to_le32(create_options);
947 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
948 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)
949 - 8 /* pad */ - 4 /* do not count rfc1001 len field */);
950
951 iov[0].iov_base = (char *)req;
952 /* 4 for rfc1002 length field */
953 iov[0].iov_len = get_rfc1002_length(req) + 4;
954
955 /* MUST set path len (NameLength) to 0 opening root of share */
956 if (uni_path_len >= 4) {
957 req->NameLength = cpu_to_le16(uni_path_len - 2);
958 /* -1 since last byte is buf[0] which is sent below (path) */
959 iov[0].iov_len--;
960 if (uni_path_len % 8 != 0) {
961 copy_size = uni_path_len / 8 * 8;
962 if (copy_size < uni_path_len)
963 copy_size += 8;
964
965 copy_path = kzalloc(copy_size, GFP_KERNEL);
966 if (!copy_path)
967 return -ENOMEM;
968 memcpy((char *)copy_path, (const char *)path,
969 uni_path_len);
970 uni_path_len = copy_size;
971 path = copy_path;
972 }
973
974 iov[1].iov_len = uni_path_len;
975 iov[1].iov_base = path;
976 /*
977 * -1 since last byte is buf[0] which was counted in
978 * smb2_buf_len.
979 */
980 inc_rfc1001_len(req, uni_path_len - 1);
981 } else {
982 iov[0].iov_len += 7;
983 req->hdr.smb2_buf_length = cpu_to_be32(be32_to_cpu(
984 req->hdr.smb2_buf_length) + 8 - 1);
985 num_iovecs = 1;
986 req->NameLength = 0;
987 }
988
989 if (!server->oplocks)
990 *oplock = SMB2_OPLOCK_LEVEL_NONE;
991
992 if (!(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
993 *oplock == SMB2_OPLOCK_LEVEL_NONE)
994 req->RequestedOplockLevel = *oplock;
995 else {
996 iov[num_iovecs].iov_base = create_lease_buf(oplock+1, *oplock);
997 if (iov[num_iovecs].iov_base == NULL) {
998 cifs_small_buf_release(req);
999 kfree(copy_path);
1000 return -ENOMEM;
1001 }
1002 iov[num_iovecs].iov_len = sizeof(struct create_lease);
1003 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1004 req->CreateContextsOffset = cpu_to_le32(
1005 sizeof(struct smb2_create_req) - 4 - 8 +
1006 iov[num_iovecs-1].iov_len);
1007 req->CreateContextsLength = cpu_to_le32(
1008 sizeof(struct create_lease));
1009 inc_rfc1001_len(&req->hdr, sizeof(struct create_lease));
1010 num_iovecs++;
1011 }
1012
1013 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1014 rsp = (struct smb2_create_rsp *)iov[0].iov_base;
1015
1016 if (rc != 0) {
1017 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
1018 goto creat_exit;
1019 }
1020
1021 *persistent_fid = rsp->PersistentFileId;
1022 *volatile_fid = rsp->VolatileFileId;
1023
1024 if (buf) {
1025 memcpy(buf, &rsp->CreationTime, 32);
1026 buf->AllocationSize = rsp->AllocationSize;
1027 buf->EndOfFile = rsp->EndofFile;
1028 buf->Attributes = rsp->FileAttributes;
1029 buf->NumberOfLinks = cpu_to_le32(1);
1030 buf->DeletePending = 0;
1031 }
1032
1033 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
1034 *oplock = parse_lease_state(rsp);
1035 else
1036 *oplock = rsp->OplockLevel;
1037 creat_exit:
1038 kfree(copy_path);
1039 free_rsp_buf(resp_buftype, rsp);
1040 return rc;
1041 }
1042
1043 int
1044 SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1045 u64 persistent_fid, u64 volatile_fid)
1046 {
1047 struct smb2_close_req *req;
1048 struct smb2_close_rsp *rsp;
1049 struct TCP_Server_Info *server;
1050 struct cifs_ses *ses = tcon->ses;
1051 struct kvec iov[1];
1052 int resp_buftype;
1053 int rc = 0;
1054
1055 cifs_dbg(FYI, "Close\n");
1056
1057 if (ses && (ses->server))
1058 server = ses->server;
1059 else
1060 return -EIO;
1061
1062 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1063 if (rc)
1064 return rc;
1065
1066 req->PersistentFileId = persistent_fid;
1067 req->VolatileFileId = volatile_fid;
1068
1069 iov[0].iov_base = (char *)req;
1070 /* 4 for rfc1002 length field */
1071 iov[0].iov_len = get_rfc1002_length(req) + 4;
1072
1073 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1074 rsp = (struct smb2_close_rsp *)iov[0].iov_base;
1075
1076 if (rc != 0) {
1077 if (tcon)
1078 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
1079 goto close_exit;
1080 }
1081
1082 /* BB FIXME - decode close response, update inode for caching */
1083
1084 close_exit:
1085 free_rsp_buf(resp_buftype, rsp);
1086 return rc;
1087 }
1088
1089 static int
1090 validate_buf(unsigned int offset, unsigned int buffer_length,
1091 struct smb2_hdr *hdr, unsigned int min_buf_size)
1092
1093 {
1094 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
1095 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
1096 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1097 char *end_of_buf = begin_of_buf + buffer_length;
1098
1099
1100 if (buffer_length < min_buf_size) {
1101 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
1102 buffer_length, min_buf_size);
1103 return -EINVAL;
1104 }
1105
1106 /* check if beyond RFC1001 maximum length */
1107 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
1108 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
1109 buffer_length, smb_len);
1110 return -EINVAL;
1111 }
1112
1113 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
1114 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
1115 return -EINVAL;
1116 }
1117
1118 return 0;
1119 }
1120
1121 /*
1122 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1123 * Caller must free buffer.
1124 */
1125 static int
1126 validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
1127 struct smb2_hdr *hdr, unsigned int minbufsize,
1128 char *data)
1129
1130 {
1131 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1132 int rc;
1133
1134 if (!data)
1135 return -EINVAL;
1136
1137 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
1138 if (rc)
1139 return rc;
1140
1141 memcpy(data, begin_of_buf, buffer_length);
1142
1143 return 0;
1144 }
1145
1146 static int
1147 query_info(const unsigned int xid, struct cifs_tcon *tcon,
1148 u64 persistent_fid, u64 volatile_fid, u8 info_class,
1149 size_t output_len, size_t min_len, void *data)
1150 {
1151 struct smb2_query_info_req *req;
1152 struct smb2_query_info_rsp *rsp = NULL;
1153 struct kvec iov[2];
1154 int rc = 0;
1155 int resp_buftype;
1156 struct TCP_Server_Info *server;
1157 struct cifs_ses *ses = tcon->ses;
1158
1159 cifs_dbg(FYI, "Query Info\n");
1160
1161 if (ses && (ses->server))
1162 server = ses->server;
1163 else
1164 return -EIO;
1165
1166 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
1167 if (rc)
1168 return rc;
1169
1170 req->InfoType = SMB2_O_INFO_FILE;
1171 req->FileInfoClass = info_class;
1172 req->PersistentFileId = persistent_fid;
1173 req->VolatileFileId = volatile_fid;
1174 /* 4 for rfc1002 length field and 1 for Buffer */
1175 req->InputBufferOffset =
1176 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
1177 req->OutputBufferLength = cpu_to_le32(output_len);
1178
1179 iov[0].iov_base = (char *)req;
1180 /* 4 for rfc1002 length field */
1181 iov[0].iov_len = get_rfc1002_length(req) + 4;
1182
1183 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1184 rsp = (struct smb2_query_info_rsp *)iov[0].iov_base;
1185
1186 if (rc) {
1187 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
1188 goto qinf_exit;
1189 }
1190
1191 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
1192 le32_to_cpu(rsp->OutputBufferLength),
1193 &rsp->hdr, min_len, data);
1194
1195 qinf_exit:
1196 free_rsp_buf(resp_buftype, rsp);
1197 return rc;
1198 }
1199
1200 int
1201 SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
1202 u64 persistent_fid, u64 volatile_fid,
1203 struct smb2_file_all_info *data)
1204 {
1205 return query_info(xid, tcon, persistent_fid, volatile_fid,
1206 FILE_ALL_INFORMATION,
1207 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
1208 sizeof(struct smb2_file_all_info), data);
1209 }
1210
1211 int
1212 SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
1213 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
1214 {
1215 return query_info(xid, tcon, persistent_fid, volatile_fid,
1216 FILE_INTERNAL_INFORMATION,
1217 sizeof(struct smb2_file_internal_info),
1218 sizeof(struct smb2_file_internal_info), uniqueid);
1219 }
1220
1221 /*
1222 * This is a no-op for now. We're not really interested in the reply, but
1223 * rather in the fact that the server sent one and that server->lstrp
1224 * gets updated.
1225 *
1226 * FIXME: maybe we should consider checking that the reply matches request?
1227 */
1228 static void
1229 smb2_echo_callback(struct mid_q_entry *mid)
1230 {
1231 struct TCP_Server_Info *server = mid->callback_data;
1232 struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf;
1233 unsigned int credits_received = 1;
1234
1235 if (mid->mid_state == MID_RESPONSE_RECEIVED)
1236 credits_received = le16_to_cpu(smb2->hdr.CreditRequest);
1237
1238 DeleteMidQEntry(mid);
1239 add_credits(server, credits_received, CIFS_ECHO_OP);
1240 }
1241
1242 int
1243 SMB2_echo(struct TCP_Server_Info *server)
1244 {
1245 struct smb2_echo_req *req;
1246 int rc = 0;
1247 struct kvec iov;
1248 struct smb_rqst rqst = { .rq_iov = &iov,
1249 .rq_nvec = 1 };
1250
1251 cifs_dbg(FYI, "In echo request\n");
1252
1253 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
1254 if (rc)
1255 return rc;
1256
1257 req->hdr.CreditRequest = cpu_to_le16(1);
1258
1259 iov.iov_base = (char *)req;
1260 /* 4 for rfc1002 length field */
1261 iov.iov_len = get_rfc1002_length(req) + 4;
1262
1263 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server,
1264 CIFS_ECHO_OP);
1265 if (rc)
1266 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
1267
1268 cifs_small_buf_release(req);
1269 return rc;
1270 }
1271
1272 int
1273 SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1274 u64 volatile_fid)
1275 {
1276 struct smb2_flush_req *req;
1277 struct TCP_Server_Info *server;
1278 struct cifs_ses *ses = tcon->ses;
1279 struct kvec iov[1];
1280 int resp_buftype;
1281 int rc = 0;
1282
1283 cifs_dbg(FYI, "Flush\n");
1284
1285 if (ses && (ses->server))
1286 server = ses->server;
1287 else
1288 return -EIO;
1289
1290 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
1291 if (rc)
1292 return rc;
1293
1294 req->PersistentFileId = persistent_fid;
1295 req->VolatileFileId = volatile_fid;
1296
1297 iov[0].iov_base = (char *)req;
1298 /* 4 for rfc1002 length field */
1299 iov[0].iov_len = get_rfc1002_length(req) + 4;
1300
1301 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1302
1303 if ((rc != 0) && tcon)
1304 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
1305
1306 free_rsp_buf(resp_buftype, iov[0].iov_base);
1307 return rc;
1308 }
1309
1310 /*
1311 * To form a chain of read requests, any read requests after the first should
1312 * have the end_of_chain boolean set to true.
1313 */
1314 static int
1315 smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms,
1316 unsigned int remaining_bytes, int request_type)
1317 {
1318 int rc = -EACCES;
1319 struct smb2_read_req *req = NULL;
1320
1321 rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req);
1322 if (rc)
1323 return rc;
1324 if (io_parms->tcon->ses->server == NULL)
1325 return -ECONNABORTED;
1326
1327 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1328
1329 req->PersistentFileId = io_parms->persistent_fid;
1330 req->VolatileFileId = io_parms->volatile_fid;
1331 req->ReadChannelInfoOffset = 0; /* reserved */
1332 req->ReadChannelInfoLength = 0; /* reserved */
1333 req->Channel = 0; /* reserved */
1334 req->MinimumCount = 0;
1335 req->Length = cpu_to_le32(io_parms->length);
1336 req->Offset = cpu_to_le64(io_parms->offset);
1337
1338 if (request_type & CHAINED_REQUEST) {
1339 if (!(request_type & END_OF_CHAIN)) {
1340 /* 4 for rfc1002 length field */
1341 req->hdr.NextCommand =
1342 cpu_to_le32(get_rfc1002_length(req) + 4);
1343 } else /* END_OF_CHAIN */
1344 req->hdr.NextCommand = 0;
1345 if (request_type & RELATED_REQUEST) {
1346 req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
1347 /*
1348 * Related requests use info from previous read request
1349 * in chain.
1350 */
1351 req->hdr.SessionId = 0xFFFFFFFF;
1352 req->hdr.TreeId = 0xFFFFFFFF;
1353 req->PersistentFileId = 0xFFFFFFFF;
1354 req->VolatileFileId = 0xFFFFFFFF;
1355 }
1356 }
1357 if (remaining_bytes > io_parms->length)
1358 req->RemainingBytes = cpu_to_le32(remaining_bytes);
1359 else
1360 req->RemainingBytes = 0;
1361
1362 iov[0].iov_base = (char *)req;
1363 /* 4 for rfc1002 length field */
1364 iov[0].iov_len = get_rfc1002_length(req) + 4;
1365 return rc;
1366 }
1367
1368 static void
1369 smb2_readv_callback(struct mid_q_entry *mid)
1370 {
1371 struct cifs_readdata *rdata = mid->callback_data;
1372 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
1373 struct TCP_Server_Info *server = tcon->ses->server;
1374 struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base;
1375 unsigned int credits_received = 1;
1376 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
1377 .rq_nvec = 1,
1378 .rq_pages = rdata->pages,
1379 .rq_npages = rdata->nr_pages,
1380 .rq_pagesz = rdata->pagesz,
1381 .rq_tailsz = rdata->tailsz };
1382
1383 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1384 __func__, mid->mid, mid->mid_state, rdata->result,
1385 rdata->bytes);
1386
1387 switch (mid->mid_state) {
1388 case MID_RESPONSE_RECEIVED:
1389 credits_received = le16_to_cpu(buf->CreditRequest);
1390 /* result already set, check signature */
1391 if (server->sec_mode &
1392 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) {
1393 int rc;
1394
1395 rc = smb2_verify_signature(&rqst, server);
1396 if (rc)
1397 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
1398 rc);
1399 }
1400 /* FIXME: should this be counted toward the initiating task? */
1401 task_io_account_read(rdata->bytes);
1402 cifs_stats_bytes_read(tcon, rdata->bytes);
1403 break;
1404 case MID_REQUEST_SUBMITTED:
1405 case MID_RETRY_NEEDED:
1406 rdata->result = -EAGAIN;
1407 break;
1408 default:
1409 if (rdata->result != -ENODATA)
1410 rdata->result = -EIO;
1411 }
1412
1413 if (rdata->result)
1414 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
1415
1416 queue_work(cifsiod_wq, &rdata->work);
1417 DeleteMidQEntry(mid);
1418 add_credits(server, credits_received, 0);
1419 }
1420
1421 /* smb2_async_readv - send an async write, and set up mid to handle result */
1422 int
1423 smb2_async_readv(struct cifs_readdata *rdata)
1424 {
1425 int rc;
1426 struct smb2_hdr *buf;
1427 struct cifs_io_parms io_parms;
1428 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
1429 .rq_nvec = 1 };
1430
1431 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
1432 __func__, rdata->offset, rdata->bytes);
1433
1434 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
1435 io_parms.offset = rdata->offset;
1436 io_parms.length = rdata->bytes;
1437 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
1438 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
1439 io_parms.pid = rdata->pid;
1440 rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0);
1441 if (rc)
1442 return rc;
1443
1444 buf = (struct smb2_hdr *)rdata->iov.iov_base;
1445 /* 4 for rfc1002 length field */
1446 rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4;
1447
1448 kref_get(&rdata->refcount);
1449 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
1450 cifs_readv_receive, smb2_readv_callback,
1451 rdata, 0);
1452 if (rc) {
1453 kref_put(&rdata->refcount, cifs_readdata_release);
1454 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
1455 }
1456
1457 cifs_small_buf_release(buf);
1458 return rc;
1459 }
1460
1461 int
1462 SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
1463 unsigned int *nbytes, char **buf, int *buf_type)
1464 {
1465 int resp_buftype, rc = -EACCES;
1466 struct smb2_read_rsp *rsp = NULL;
1467 struct kvec iov[1];
1468
1469 *nbytes = 0;
1470 rc = smb2_new_read_req(iov, io_parms, 0, 0);
1471 if (rc)
1472 return rc;
1473
1474 rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1,
1475 &resp_buftype, CIFS_LOG_ERROR);
1476
1477 rsp = (struct smb2_read_rsp *)iov[0].iov_base;
1478
1479 if (rsp->hdr.Status == STATUS_END_OF_FILE) {
1480 free_rsp_buf(resp_buftype, iov[0].iov_base);
1481 return 0;
1482 }
1483
1484 if (rc) {
1485 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
1486 cifs_dbg(VFS, "Send error in read = %d\n", rc);
1487 } else {
1488 *nbytes = le32_to_cpu(rsp->DataLength);
1489 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
1490 (*nbytes > io_parms->length)) {
1491 cifs_dbg(FYI, "bad length %d for count %d\n",
1492 *nbytes, io_parms->length);
1493 rc = -EIO;
1494 *nbytes = 0;
1495 }
1496 }
1497
1498 if (*buf) {
1499 memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset,
1500 *nbytes);
1501 free_rsp_buf(resp_buftype, iov[0].iov_base);
1502 } else if (resp_buftype != CIFS_NO_BUFFER) {
1503 *buf = iov[0].iov_base;
1504 if (resp_buftype == CIFS_SMALL_BUFFER)
1505 *buf_type = CIFS_SMALL_BUFFER;
1506 else if (resp_buftype == CIFS_LARGE_BUFFER)
1507 *buf_type = CIFS_LARGE_BUFFER;
1508 }
1509 return rc;
1510 }
1511
1512 /*
1513 * Check the mid_state and signature on received buffer (if any), and queue the
1514 * workqueue completion task.
1515 */
1516 static void
1517 smb2_writev_callback(struct mid_q_entry *mid)
1518 {
1519 struct cifs_writedata *wdata = mid->callback_data;
1520 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1521 unsigned int written;
1522 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
1523 unsigned int credits_received = 1;
1524
1525 switch (mid->mid_state) {
1526 case MID_RESPONSE_RECEIVED:
1527 credits_received = le16_to_cpu(rsp->hdr.CreditRequest);
1528 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
1529 if (wdata->result != 0)
1530 break;
1531
1532 written = le32_to_cpu(rsp->DataLength);
1533 /*
1534 * Mask off high 16 bits when bytes written as returned
1535 * by the server is greater than bytes requested by the
1536 * client. OS/2 servers are known to set incorrect
1537 * CountHigh values.
1538 */
1539 if (written > wdata->bytes)
1540 written &= 0xFFFF;
1541
1542 if (written < wdata->bytes)
1543 wdata->result = -ENOSPC;
1544 else
1545 wdata->bytes = written;
1546 break;
1547 case MID_REQUEST_SUBMITTED:
1548 case MID_RETRY_NEEDED:
1549 wdata->result = -EAGAIN;
1550 break;
1551 default:
1552 wdata->result = -EIO;
1553 break;
1554 }
1555
1556 if (wdata->result)
1557 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1558
1559 queue_work(cifsiod_wq, &wdata->work);
1560 DeleteMidQEntry(mid);
1561 add_credits(tcon->ses->server, credits_received, 0);
1562 }
1563
1564 /* smb2_async_writev - send an async write, and set up mid to handle result */
1565 int
1566 smb2_async_writev(struct cifs_writedata *wdata)
1567 {
1568 int rc = -EACCES;
1569 struct smb2_write_req *req = NULL;
1570 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1571 struct kvec iov;
1572 struct smb_rqst rqst;
1573
1574 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
1575 if (rc)
1576 goto async_writev_out;
1577
1578 req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid);
1579
1580 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
1581 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
1582 req->WriteChannelInfoOffset = 0;
1583 req->WriteChannelInfoLength = 0;
1584 req->Channel = 0;
1585 req->Offset = cpu_to_le64(wdata->offset);
1586 /* 4 for rfc1002 length field */
1587 req->DataOffset = cpu_to_le16(
1588 offsetof(struct smb2_write_req, Buffer) - 4);
1589 req->RemainingBytes = 0;
1590
1591 /* 4 for rfc1002 length field and 1 for Buffer */
1592 iov.iov_len = get_rfc1002_length(req) + 4 - 1;
1593 iov.iov_base = req;
1594
1595 rqst.rq_iov = &iov;
1596 rqst.rq_nvec = 1;
1597 rqst.rq_pages = wdata->pages;
1598 rqst.rq_npages = wdata->nr_pages;
1599 rqst.rq_pagesz = wdata->pagesz;
1600 rqst.rq_tailsz = wdata->tailsz;
1601
1602 cifs_dbg(FYI, "async write at %llu %u bytes\n",
1603 wdata->offset, wdata->bytes);
1604
1605 req->Length = cpu_to_le32(wdata->bytes);
1606
1607 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
1608
1609 kref_get(&wdata->refcount);
1610 rc = cifs_call_async(tcon->ses->server, &rqst, NULL,
1611 smb2_writev_callback, wdata, 0);
1612
1613 if (rc) {
1614 kref_put(&wdata->refcount, cifs_writedata_release);
1615 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1616 }
1617
1618 async_writev_out:
1619 cifs_small_buf_release(req);
1620 return rc;
1621 }
1622
1623 /*
1624 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1625 * The length field from io_parms must be at least 1 and indicates a number of
1626 * elements with data to write that begins with position 1 in iov array. All
1627 * data length is specified by count.
1628 */
1629 int
1630 SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
1631 unsigned int *nbytes, struct kvec *iov, int n_vec)
1632 {
1633 int rc = 0;
1634 struct smb2_write_req *req = NULL;
1635 struct smb2_write_rsp *rsp = NULL;
1636 int resp_buftype;
1637 *nbytes = 0;
1638
1639 if (n_vec < 1)
1640 return rc;
1641
1642 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
1643 if (rc)
1644 return rc;
1645
1646 if (io_parms->tcon->ses->server == NULL)
1647 return -ECONNABORTED;
1648
1649 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1650
1651 req->PersistentFileId = io_parms->persistent_fid;
1652 req->VolatileFileId = io_parms->volatile_fid;
1653 req->WriteChannelInfoOffset = 0;
1654 req->WriteChannelInfoLength = 0;
1655 req->Channel = 0;
1656 req->Length = cpu_to_le32(io_parms->length);
1657 req->Offset = cpu_to_le64(io_parms->offset);
1658 /* 4 for rfc1002 length field */
1659 req->DataOffset = cpu_to_le16(
1660 offsetof(struct smb2_write_req, Buffer) - 4);
1661 req->RemainingBytes = 0;
1662
1663 iov[0].iov_base = (char *)req;
1664 /* 4 for rfc1002 length field and 1 for Buffer */
1665 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1666
1667 /* length of entire message including data to be written */
1668 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
1669
1670 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
1671 &resp_buftype, 0);
1672 rsp = (struct smb2_write_rsp *)iov[0].iov_base;
1673
1674 if (rc) {
1675 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
1676 cifs_dbg(VFS, "Send error in write = %d\n", rc);
1677 } else
1678 *nbytes = le32_to_cpu(rsp->DataLength);
1679
1680 free_rsp_buf(resp_buftype, rsp);
1681 return rc;
1682 }
1683
1684 static unsigned int
1685 num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
1686 {
1687 int len;
1688 unsigned int entrycount = 0;
1689 unsigned int next_offset = 0;
1690 FILE_DIRECTORY_INFO *entryptr;
1691
1692 if (bufstart == NULL)
1693 return 0;
1694
1695 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
1696
1697 while (1) {
1698 entryptr = (FILE_DIRECTORY_INFO *)
1699 ((char *)entryptr + next_offset);
1700
1701 if ((char *)entryptr + size > end_of_buf) {
1702 cifs_dbg(VFS, "malformed search entry would overflow\n");
1703 break;
1704 }
1705
1706 len = le32_to_cpu(entryptr->FileNameLength);
1707 if ((char *)entryptr + len + size > end_of_buf) {
1708 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
1709 end_of_buf);
1710 break;
1711 }
1712
1713 *lastentry = (char *)entryptr;
1714 entrycount++;
1715
1716 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
1717 if (!next_offset)
1718 break;
1719 }
1720
1721 return entrycount;
1722 }
1723
1724 /*
1725 * Readdir/FindFirst
1726 */
1727 int
1728 SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
1729 u64 persistent_fid, u64 volatile_fid, int index,
1730 struct cifs_search_info *srch_inf)
1731 {
1732 struct smb2_query_directory_req *req;
1733 struct smb2_query_directory_rsp *rsp = NULL;
1734 struct kvec iov[2];
1735 int rc = 0;
1736 int len;
1737 int resp_buftype;
1738 unsigned char *bufptr;
1739 struct TCP_Server_Info *server;
1740 struct cifs_ses *ses = tcon->ses;
1741 __le16 asteriks = cpu_to_le16('*');
1742 char *end_of_smb;
1743 unsigned int output_size = CIFSMaxBufSize;
1744 size_t info_buf_size;
1745
1746 if (ses && (ses->server))
1747 server = ses->server;
1748 else
1749 return -EIO;
1750
1751 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
1752 if (rc)
1753 return rc;
1754
1755 switch (srch_inf->info_level) {
1756 case SMB_FIND_FILE_DIRECTORY_INFO:
1757 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
1758 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
1759 break;
1760 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
1761 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
1762 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
1763 break;
1764 default:
1765 cifs_dbg(VFS, "info level %u isn't supported\n",
1766 srch_inf->info_level);
1767 rc = -EINVAL;
1768 goto qdir_exit;
1769 }
1770
1771 req->FileIndex = cpu_to_le32(index);
1772 req->PersistentFileId = persistent_fid;
1773 req->VolatileFileId = volatile_fid;
1774
1775 len = 0x2;
1776 bufptr = req->Buffer;
1777 memcpy(bufptr, &asteriks, len);
1778
1779 req->FileNameOffset =
1780 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
1781 req->FileNameLength = cpu_to_le16(len);
1782 /*
1783 * BB could be 30 bytes or so longer if we used SMB2 specific
1784 * buffer lengths, but this is safe and close enough.
1785 */
1786 output_size = min_t(unsigned int, output_size, server->maxBuf);
1787 output_size = min_t(unsigned int, output_size, 2 << 15);
1788 req->OutputBufferLength = cpu_to_le32(output_size);
1789
1790 iov[0].iov_base = (char *)req;
1791 /* 4 for RFC1001 length and 1 for Buffer */
1792 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1793
1794 iov[1].iov_base = (char *)(req->Buffer);
1795 iov[1].iov_len = len;
1796
1797 inc_rfc1001_len(req, len - 1 /* Buffer */);
1798
1799 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
1800 rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base;
1801
1802 if (rc) {
1803 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
1804 goto qdir_exit;
1805 }
1806
1807 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
1808 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
1809 info_buf_size);
1810 if (rc)
1811 goto qdir_exit;
1812
1813 srch_inf->unicode = true;
1814
1815 if (srch_inf->ntwrk_buf_start) {
1816 if (srch_inf->smallBuf)
1817 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
1818 else
1819 cifs_buf_release(srch_inf->ntwrk_buf_start);
1820 }
1821 srch_inf->ntwrk_buf_start = (char *)rsp;
1822 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
1823 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
1824 /* 4 for rfc1002 length field */
1825 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
1826 srch_inf->entries_in_buffer =
1827 num_entries(srch_inf->srch_entries_start, end_of_smb,
1828 &srch_inf->last_entry, info_buf_size);
1829 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
1830 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
1831 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
1832 srch_inf->srch_entries_start, srch_inf->last_entry);
1833 if (resp_buftype == CIFS_LARGE_BUFFER)
1834 srch_inf->smallBuf = false;
1835 else if (resp_buftype == CIFS_SMALL_BUFFER)
1836 srch_inf->smallBuf = true;
1837 else
1838 cifs_dbg(VFS, "illegal search buffer type\n");
1839
1840 if (rsp->hdr.Status == STATUS_NO_MORE_FILES)
1841 srch_inf->endOfSearch = 1;
1842 else
1843 srch_inf->endOfSearch = 0;
1844
1845 return rc;
1846
1847 qdir_exit:
1848 free_rsp_buf(resp_buftype, rsp);
1849 return rc;
1850 }
1851
1852 static int
1853 send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
1854 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
1855 unsigned int num, void **data, unsigned int *size)
1856 {
1857 struct smb2_set_info_req *req;
1858 struct smb2_set_info_rsp *rsp = NULL;
1859 struct kvec *iov;
1860 int rc = 0;
1861 int resp_buftype;
1862 unsigned int i;
1863 struct TCP_Server_Info *server;
1864 struct cifs_ses *ses = tcon->ses;
1865
1866 if (ses && (ses->server))
1867 server = ses->server;
1868 else
1869 return -EIO;
1870
1871 if (!num)
1872 return -EINVAL;
1873
1874 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
1875 if (!iov)
1876 return -ENOMEM;
1877
1878 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
1879 if (rc) {
1880 kfree(iov);
1881 return rc;
1882 }
1883
1884 req->hdr.ProcessId = cpu_to_le32(pid);
1885
1886 req->InfoType = SMB2_O_INFO_FILE;
1887 req->FileInfoClass = info_class;
1888 req->PersistentFileId = persistent_fid;
1889 req->VolatileFileId = volatile_fid;
1890
1891 /* 4 for RFC1001 length and 1 for Buffer */
1892 req->BufferOffset =
1893 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
1894 req->BufferLength = cpu_to_le32(*size);
1895
1896 inc_rfc1001_len(req, *size - 1 /* Buffer */);
1897
1898 memcpy(req->Buffer, *data, *size);
1899
1900 iov[0].iov_base = (char *)req;
1901 /* 4 for RFC1001 length */
1902 iov[0].iov_len = get_rfc1002_length(req) + 4;
1903
1904 for (i = 1; i < num; i++) {
1905 inc_rfc1001_len(req, size[i]);
1906 le32_add_cpu(&req->BufferLength, size[i]);
1907 iov[i].iov_base = (char *)data[i];
1908 iov[i].iov_len = size[i];
1909 }
1910
1911 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0);
1912 rsp = (struct smb2_set_info_rsp *)iov[0].iov_base;
1913
1914 if (rc != 0) {
1915 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
1916 goto out;
1917 }
1918 out:
1919 free_rsp_buf(resp_buftype, rsp);
1920 kfree(iov);
1921 return rc;
1922 }
1923
1924 int
1925 SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
1926 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
1927 {
1928 struct smb2_file_rename_info info;
1929 void **data;
1930 unsigned int size[2];
1931 int rc;
1932 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
1933
1934 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
1935 if (!data)
1936 return -ENOMEM;
1937
1938 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
1939 /* 0 = fail if target already exists */
1940 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
1941 info.FileNameLength = cpu_to_le32(len);
1942
1943 data[0] = &info;
1944 size[0] = sizeof(struct smb2_file_rename_info);
1945
1946 data[1] = target_file;
1947 size[1] = len + 2 /* null */;
1948
1949 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
1950 current->tgid, FILE_RENAME_INFORMATION, 2, data,
1951 size);
1952 kfree(data);
1953 return rc;
1954 }
1955
1956 int
1957 SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
1958 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
1959 {
1960 struct smb2_file_link_info info;
1961 void **data;
1962 unsigned int size[2];
1963 int rc;
1964 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
1965
1966 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
1967 if (!data)
1968 return -ENOMEM;
1969
1970 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
1971 /* 0 = fail if link already exists */
1972 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
1973 info.FileNameLength = cpu_to_le32(len);
1974
1975 data[0] = &info;
1976 size[0] = sizeof(struct smb2_file_link_info);
1977
1978 data[1] = target_file;
1979 size[1] = len + 2 /* null */;
1980
1981 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
1982 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
1983 kfree(data);
1984 return rc;
1985 }
1986
1987 int
1988 SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1989 u64 volatile_fid, u32 pid, __le64 *eof)
1990 {
1991 struct smb2_file_eof_info info;
1992 void *data;
1993 unsigned int size;
1994
1995 info.EndOfFile = *eof;
1996
1997 data = &info;
1998 size = sizeof(struct smb2_file_eof_info);
1999
2000 return send_set_info(xid, tcon, persistent_fid, volatile_fid, pid,
2001 FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
2002 }
2003
2004 int
2005 SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2006 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
2007 {
2008 unsigned int size;
2009 size = sizeof(FILE_BASIC_INFO);
2010 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2011 current->tgid, FILE_BASIC_INFORMATION, 1,
2012 (void **)&buf, &size);
2013 }
2014
2015 int
2016 SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
2017 const u64 persistent_fid, const u64 volatile_fid,
2018 __u8 oplock_level)
2019 {
2020 int rc;
2021 struct smb2_oplock_break *req = NULL;
2022
2023 cifs_dbg(FYI, "SMB2_oplock_break\n");
2024 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2025
2026 if (rc)
2027 return rc;
2028
2029 req->VolatileFid = volatile_fid;
2030 req->PersistentFid = persistent_fid;
2031 req->OplockLevel = oplock_level;
2032 req->hdr.CreditRequest = cpu_to_le16(1);
2033
2034 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2035 /* SMB2 buffer freed by function above */
2036
2037 if (rc) {
2038 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2039 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
2040 }
2041
2042 return rc;
2043 }
2044
2045 static void
2046 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
2047 struct kstatfs *kst)
2048 {
2049 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
2050 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
2051 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
2052 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
2053 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
2054 return;
2055 }
2056
2057 static int
2058 build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
2059 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
2060 {
2061 int rc;
2062 struct smb2_query_info_req *req;
2063
2064 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
2065
2066 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
2067 return -EIO;
2068
2069 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2070 if (rc)
2071 return rc;
2072
2073 req->InfoType = SMB2_O_INFO_FILESYSTEM;
2074 req->FileInfoClass = level;
2075 req->PersistentFileId = persistent_fid;
2076 req->VolatileFileId = volatile_fid;
2077 /* 4 for rfc1002 length field and 1 for pad */
2078 req->InputBufferOffset =
2079 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
2080 req->OutputBufferLength = cpu_to_le32(
2081 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
2082
2083 iov->iov_base = (char *)req;
2084 /* 4 for rfc1002 length field */
2085 iov->iov_len = get_rfc1002_length(req) + 4;
2086 return 0;
2087 }
2088
2089 int
2090 SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
2091 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
2092 {
2093 struct smb2_query_info_rsp *rsp = NULL;
2094 struct kvec iov;
2095 int rc = 0;
2096 int resp_buftype;
2097 struct cifs_ses *ses = tcon->ses;
2098 struct smb2_fs_full_size_info *info = NULL;
2099
2100 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
2101 sizeof(struct smb2_fs_full_size_info),
2102 persistent_fid, volatile_fid);
2103 if (rc)
2104 return rc;
2105
2106 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2107 if (rc) {
2108 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2109 goto qinf_exit;
2110 }
2111 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2112
2113 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
2114 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
2115 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2116 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2117 sizeof(struct smb2_fs_full_size_info));
2118 if (!rc)
2119 copy_fs_info_to_kstatfs(info, fsdata);
2120
2121 qinf_exit:
2122 free_rsp_buf(resp_buftype, iov.iov_base);
2123 return rc;
2124 }
2125
2126 int
2127 smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
2128 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2129 const __u32 num_lock, struct smb2_lock_element *buf)
2130 {
2131 int rc = 0;
2132 struct smb2_lock_req *req = NULL;
2133 struct kvec iov[2];
2134 int resp_buf_type;
2135 unsigned int count;
2136
2137 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
2138
2139 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
2140 if (rc)
2141 return rc;
2142
2143 req->hdr.ProcessId = cpu_to_le32(pid);
2144 req->LockCount = cpu_to_le16(num_lock);
2145
2146 req->PersistentFileId = persist_fid;
2147 req->VolatileFileId = volatile_fid;
2148
2149 count = num_lock * sizeof(struct smb2_lock_element);
2150 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
2151
2152 iov[0].iov_base = (char *)req;
2153 /* 4 for rfc1002 length field and count for all locks */
2154 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
2155 iov[1].iov_base = (char *)buf;
2156 iov[1].iov_len = count;
2157
2158 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
2159 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP);
2160 if (rc) {
2161 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
2162 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
2163 }
2164
2165 return rc;
2166 }
2167
2168 int
2169 SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
2170 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2171 const __u64 length, const __u64 offset, const __u32 lock_flags,
2172 const bool wait)
2173 {
2174 struct smb2_lock_element lock;
2175
2176 lock.Offset = cpu_to_le64(offset);
2177 lock.Length = cpu_to_le64(length);
2178 lock.Flags = cpu_to_le32(lock_flags);
2179 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
2180 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
2181
2182 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
2183 }
2184
2185 int
2186 SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
2187 __u8 *lease_key, const __le32 lease_state)
2188 {
2189 int rc;
2190 struct smb2_lease_ack *req = NULL;
2191
2192 cifs_dbg(FYI, "SMB2_lease_break\n");
2193 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2194
2195 if (rc)
2196 return rc;
2197
2198 req->hdr.CreditRequest = cpu_to_le16(1);
2199 req->StructureSize = cpu_to_le16(36);
2200 inc_rfc1001_len(req, 12);
2201
2202 memcpy(req->LeaseKey, lease_key, 16);
2203 req->LeaseState = lease_state;
2204
2205 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2206 /* SMB2 buffer freed by function above */
2207
2208 if (rc) {
2209 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2210 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
2211 }
2212
2213 return rc;
2214 }
kernel source for telekom puls (alcatel/mediatek)