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