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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
52
53
54
55
56
57static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
58 36,
59 25,
60 4,
61 9,
62 4,
63 57,
64 24,
65 24,
66 49,
67 49,
68 48,
69 57,
70 4,
71 4,
72 33,
73 32,
74 41,
75 33,
76 24
77};
78
79
80static void
81smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd ,
82 const struct cifs_tcon *tcon)
83{
84 struct smb2_pdu *pdu = (struct smb2_pdu *)hdr;
85 char *temp = (char *)hdr;
86
87 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_cmd)];
88
89
90
91
92
93 memset(temp, 0, 256);
94
95
96 hdr->smb2_buf_length = cpu_to_be32(parmsize + sizeof(struct smb2_hdr)
97 - 4 );
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);
106 hdr->ProcessId = cpu_to_le32((__u16)current->tgid);
107
108 if (!tcon)
109 goto out;
110
111
112
113
114 if ((tcon->ses) &&
115 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
116 hdr->CreditCharge = cpu_to_le16(1);
117
118
119 hdr->TreeId = tcon->tid;
120
121 if (tcon->ses)
122 hdr->SessionId = tcon->ses->Suid;
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign)
138 hdr->Flags |= SMB2_FLAGS_SIGNED;
139out:
140 pdu->StructureSize2 = cpu_to_le16(parmsize);
141 return;
142}
143
144static int
145smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
146{
147 int rc = 0;
148 struct nls_table *nls_codepage;
149 struct cifs_ses *ses;
150 struct TCP_Server_Info *server;
151
152
153
154
155
156
157 if (tcon == NULL)
158 return rc;
159
160 if (smb2_command == SMB2_TREE_CONNECT)
161 return rc;
162
163 if (tcon->tidStatus == CifsExiting) {
164
165
166
167
168
169 if ((smb2_command != SMB2_WRITE) &&
170 (smb2_command != SMB2_CREATE) &&
171 (smb2_command != SMB2_TREE_DISCONNECT)) {
172 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
173 smb2_command);
174 return -ENODEV;
175 }
176 }
177 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
178 (!tcon->ses->server))
179 return -EIO;
180
181 ses = tcon->ses;
182 server = ses->server;
183
184
185
186
187
188 while (server->tcpStatus == CifsNeedReconnect) {
189
190
191
192
193 switch (smb2_command) {
194
195
196
197 case SMB2_TREE_DISCONNECT:
198 case SMB2_CANCEL:
199 case SMB2_CLOSE:
200 case SMB2_OPLOCK_BREAK:
201 return -EAGAIN;
202 }
203
204 wait_event_interruptible_timeout(server->response_q,
205 (server->tcpStatus != CifsNeedReconnect), 10 * HZ);
206
207
208 if (server->tcpStatus != CifsNeedReconnect)
209 break;
210
211
212
213
214
215
216 if (!tcon->retry) {
217 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
218 return -EHOSTDOWN;
219 }
220 }
221
222 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
223 return rc;
224
225 nls_codepage = load_nls_default();
226
227
228
229
230
231 mutex_lock(&tcon->ses->session_mutex);
232 rc = cifs_negotiate_protocol(0, tcon->ses);
233 if (!rc && tcon->ses->need_reconnect)
234 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
235
236 if (rc || !tcon->need_reconnect) {
237 mutex_unlock(&tcon->ses->session_mutex);
238 goto out;
239 }
240
241 cifs_mark_open_files_invalid(tcon);
242 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
243 mutex_unlock(&tcon->ses->session_mutex);
244 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
245 if (rc)
246 goto out;
247 atomic_inc(&tconInfoReconnectCount);
248
249
250
251
252out:
253
254
255
256
257
258
259
260
261 switch (smb2_command) {
262 case SMB2_FLUSH:
263 case SMB2_READ:
264 case SMB2_WRITE:
265 case SMB2_LOCK:
266 case SMB2_IOCTL:
267 case SMB2_QUERY_DIRECTORY:
268 case SMB2_CHANGE_NOTIFY:
269 case SMB2_QUERY_INFO:
270 case SMB2_SET_INFO:
271 return -EAGAIN;
272 }
273 unload_nls(nls_codepage);
274 return rc;
275}
276
277
278
279
280
281
282static int
283small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
284 void **request_buf)
285{
286 int rc = 0;
287
288 rc = smb2_reconnect(smb2_command, tcon);
289 if (rc)
290 return rc;
291
292
293 *request_buf = cifs_small_buf_get();
294 if (*request_buf == NULL) {
295
296 return -ENOMEM;
297 }
298
299 smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon);
300
301 if (tcon != NULL) {
302#ifdef CONFIG_CIFS_STATS2
303 uint16_t com_code = le16_to_cpu(smb2_command);
304 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
305#endif
306 cifs_stats_inc(&tcon->num_smbs_sent);
307 }
308
309 return rc;
310}
311
312static void
313free_rsp_buf(int resp_buftype, void *rsp)
314{
315 if (resp_buftype == CIFS_SMALL_BUFFER)
316 cifs_small_buf_release(rsp);
317 else if (resp_buftype == CIFS_LARGE_BUFFER)
318 cifs_buf_release(rsp);
319}
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337int
338SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
339{
340 struct smb2_negotiate_req *req;
341 struct smb2_negotiate_rsp *rsp;
342 struct kvec iov[1];
343 int rc = 0;
344 int resp_buftype;
345 struct TCP_Server_Info *server = ses->server;
346 int blob_offset, blob_length;
347 char *security_blob;
348 int flags = CIFS_NEG_OP;
349
350 cifs_dbg(FYI, "Negotiate protocol\n");
351
352 if (!server) {
353 WARN(1, "%s: server is NULL!\n", __func__);
354 return -EIO;
355 }
356
357 rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
358 if (rc)
359 return rc;
360
361 req->hdr.SessionId = 0;
362
363 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
364
365 req->DialectCount = cpu_to_le16(1);
366 inc_rfc1001_len(req, 2);
367
368
369 if (ses->sign)
370 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
371 else if (global_secflags & CIFSSEC_MAY_SIGN)
372 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
373 else
374 req->SecurityMode = 0;
375
376 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
377
378
379 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
380 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
381 else
382 memcpy(req->ClientGUID, server->client_guid,
383 SMB2_CLIENT_GUID_SIZE);
384
385 iov[0].iov_base = (char *)req;
386
387 iov[0].iov_len = get_rfc1002_length(req) + 4;
388
389 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags);
390
391 rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base;
392
393
394
395
396 if (rc != 0)
397 goto neg_exit;
398
399 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
400
401
402
403 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
404 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
405 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
406 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
407 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
408 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
409 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
410 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
411 else {
412 cifs_dbg(VFS, "Illegal dialect returned by server %d\n",
413 le16_to_cpu(rsp->DialectRevision));
414 rc = -EIO;
415 goto neg_exit;
416 }
417 server->dialect = le16_to_cpu(rsp->DialectRevision);
418
419
420 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
421
422 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
423 SMB2_MAX_BUFFER_SIZE);
424 server->max_read = le32_to_cpu(rsp->MaxReadSize);
425 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
426
427 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
428 server->capabilities = le32_to_cpu(rsp->Capabilities);
429
430 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
431
432 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
433 &rsp->hdr);
434
435
436
437
438
439
440
441 if (blob_length == 0)
442 cifs_dbg(FYI, "missing security blob on negprot\n");
443
444 rc = cifs_enable_signing(server, ses->sign);
445#ifdef CONFIG_SMB2_ASN1
446 if (rc)
447 goto neg_exit;
448 if (blob_length)
449 rc = decode_neg_token_init(security_blob, blob_length,
450 &server->sec_type);
451 if (rc == 1)
452 rc = 0;
453 else if (rc == 0) {
454 rc = -EIO;
455 goto neg_exit;
456 }
457#endif
458
459neg_exit:
460 free_rsp_buf(resp_buftype, rsp);
461 return rc;
462}
463
464int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
465{
466 int rc = 0;
467 struct validate_negotiate_info_req vneg_inbuf;
468 struct validate_negotiate_info_rsp *pneg_rsp;
469 u32 rsplen;
470
471 cifs_dbg(FYI, "validate negotiate\n");
472
473
474
475
476
477
478
479
480
481 if (tcon->ses->server->sign == false)
482 return 0;
483
484 vneg_inbuf.Capabilities =
485 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
486 memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid,
487 SMB2_CLIENT_GUID_SIZE);
488
489 if (tcon->ses->sign)
490 vneg_inbuf.SecurityMode =
491 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
492 else if (global_secflags & CIFSSEC_MAY_SIGN)
493 vneg_inbuf.SecurityMode =
494 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
495 else
496 vneg_inbuf.SecurityMode = 0;
497
498 vneg_inbuf.DialectCount = cpu_to_le16(1);
499 vneg_inbuf.Dialects[0] =
500 cpu_to_le16(tcon->ses->server->vals->protocol_id);
501
502 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
503 FSCTL_VALIDATE_NEGOTIATE_INFO, true ,
504 (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
505 (char **)&pneg_rsp, &rsplen);
506
507 if (rc != 0) {
508 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
509 return -EIO;
510 }
511
512 if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
513 cifs_dbg(VFS, "invalid size of protocol negotiate response\n");
514 return -EIO;
515 }
516
517
518 if (pneg_rsp->Dialect !=
519 cpu_to_le16(tcon->ses->server->vals->protocol_id))
520 goto vneg_out;
521
522 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
523 goto vneg_out;
524
525
526
527 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
528 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
529 goto vneg_out;
530
531
532 cifs_dbg(FYI, "validate negotiate info successful\n");
533 return 0;
534
535vneg_out:
536 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
537 return -EIO;
538}
539
540int
541SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
542 const struct nls_table *nls_cp)
543{
544 struct smb2_sess_setup_req *req;
545 struct smb2_sess_setup_rsp *rsp = NULL;
546 struct kvec iov[2];
547 int rc = 0;
548 int resp_buftype;
549 __le32 phase = NtLmNegotiate;
550 struct TCP_Server_Info *server = ses->server;
551 u16 blob_length = 0;
552 char *security_blob;
553 char *ntlmssp_blob = NULL;
554 bool use_spnego = false;
555
556 cifs_dbg(FYI, "Session Setup\n");
557
558 if (!server) {
559 WARN(1, "%s: server is NULL!\n", __func__);
560 return -EIO;
561 }
562
563
564
565
566
567 kfree(ses->auth_key.response);
568 ses->auth_key.response = NULL;
569
570
571
572
573
574 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
575 if (!ses->ntlmssp)
576 return -ENOMEM;
577 ses->ntlmssp->sesskey_per_smbsess = true;
578
579
580 ses->sectype = RawNTLMSSP;
581
582ssetup_ntlmssp_authenticate:
583 if (phase == NtLmChallenge)
584 phase = NtLmAuthenticate;
585
586 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
587 if (rc)
588 return rc;
589
590 req->hdr.SessionId = 0;
591 req->VcNumber = 0;
592
593 req->hdr.CreditRequest = cpu_to_le16(3);
594
595
596 if (server->sign)
597 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
598 else if (global_secflags & CIFSSEC_MAY_SIGN)
599 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
600 else
601 req->SecurityMode = 0;
602
603 req->Capabilities = 0;
604 req->Channel = 0;
605
606 iov[0].iov_base = (char *)req;
607
608 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
609 if (phase == NtLmNegotiate) {
610 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
611 GFP_KERNEL);
612 if (ntlmssp_blob == NULL) {
613 rc = -ENOMEM;
614 goto ssetup_exit;
615 }
616 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
617 if (use_spnego) {
618
619
620
621
622
623 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
624 rc = -EOPNOTSUPP;
625 kfree(ntlmssp_blob);
626 goto ssetup_exit;
627 } else {
628 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
629
630 security_blob = ntlmssp_blob;
631 }
632 } else if (phase == NtLmAuthenticate) {
633 req->hdr.SessionId = ses->Suid;
634 ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500,
635 GFP_KERNEL);
636 if (ntlmssp_blob == NULL) {
637 rc = -ENOMEM;
638 goto ssetup_exit;
639 }
640 rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses,
641 nls_cp);
642 if (rc) {
643 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n",
644 rc);
645 goto ssetup_exit;
646 }
647 if (use_spnego) {
648
649
650
651
652 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
653 rc = -EOPNOTSUPP;
654 kfree(ntlmssp_blob);
655 goto ssetup_exit;
656 } else {
657 security_blob = ntlmssp_blob;
658 }
659 } else {
660 cifs_dbg(VFS, "illegal ntlmssp phase\n");
661 rc = -EIO;
662 goto ssetup_exit;
663 }
664
665
666 req->SecurityBufferOffset =
667 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
668 1 - 4 );
669 req->SecurityBufferLength = cpu_to_le16(blob_length);
670 iov[1].iov_base = security_blob;
671 iov[1].iov_len = blob_length;
672
673 inc_rfc1001_len(req, blob_length - 1 );
674
675
676
677 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype,
678 CIFS_LOG_ERROR | CIFS_NEG_OP);
679
680 kfree(security_blob);
681 rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base;
682 if (resp_buftype != CIFS_NO_BUFFER &&
683 rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) {
684 if (phase != NtLmNegotiate) {
685 cifs_dbg(VFS, "Unexpected more processing error\n");
686 goto ssetup_exit;
687 }
688 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
689 le16_to_cpu(rsp->SecurityBufferOffset)) {
690 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
691 le16_to_cpu(rsp->SecurityBufferOffset));
692 rc = -EIO;
693 goto ssetup_exit;
694 }
695
696
697 phase = NtLmChallenge;
698 rc = 0;
699 ses->Suid = rsp->hdr.SessionId;
700 rc = decode_ntlmssp_challenge(rsp->Buffer,
701 le16_to_cpu(rsp->SecurityBufferLength), ses);
702 }
703
704
705
706
707
708
709
710
711
712 if (rc != 0)
713 goto ssetup_exit;
714
715 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
716 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
717 cifs_dbg(VFS, "SMB3 encryption not supported yet\n");
718ssetup_exit:
719 free_rsp_buf(resp_buftype, rsp);
720
721
722 if ((phase == NtLmChallenge) && (rc == 0))
723 goto ssetup_ntlmssp_authenticate;
724
725 if (!rc) {
726 mutex_lock(&server->srv_mutex);
727 if (server->sign && server->ops->generate_signingkey) {
728 rc = server->ops->generate_signingkey(ses);
729 kfree(ses->auth_key.response);
730 ses->auth_key.response = NULL;
731 if (rc) {
732 cifs_dbg(FYI,
733 "SMB3 session key generation failed\n");
734 mutex_unlock(&server->srv_mutex);
735 goto keygen_exit;
736 }
737 }
738 if (!server->session_estab) {
739 server->sequence_number = 0x2;
740 server->session_estab = true;
741 }
742 mutex_unlock(&server->srv_mutex);
743
744 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
745 spin_lock(&GlobalMid_Lock);
746 ses->status = CifsGood;
747 ses->need_reconnect = false;
748 spin_unlock(&GlobalMid_Lock);
749 }
750
751keygen_exit:
752 if (!server->sign) {
753 kfree(ses->auth_key.response);
754 ses->auth_key.response = NULL;
755 }
756 kfree(ses->ntlmssp);
757
758 return rc;
759}
760
761int
762SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
763{
764 struct smb2_logoff_req *req;
765 int rc = 0;
766 struct TCP_Server_Info *server;
767
768 cifs_dbg(FYI, "disconnect session %p\n", ses);
769
770 if (ses && (ses->server))
771 server = ses->server;
772 else
773 return -EIO;
774
775
776 if (ses->need_reconnect)
777 goto smb2_session_already_dead;
778
779 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
780 if (rc)
781 return rc;
782
783
784 req->hdr.SessionId = ses->Suid;
785 if (server->sign)
786 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
787
788 rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0);
789
790
791
792
793
794smb2_session_already_dead:
795 return rc;
796}
797
798static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
799{
800 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
801}
802
803#define MAX_SHARENAME_LENGTH (255 + 80 + 1 )
804
805
806static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
807{
808 tcon->max_chunks = 256;
809 tcon->max_bytes_chunk = 1048576;
810 tcon->max_bytes_copy = 16777216;
811}
812
813int
814SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
815 struct cifs_tcon *tcon, const struct nls_table *cp)
816{
817 struct smb2_tree_connect_req *req;
818 struct smb2_tree_connect_rsp *rsp = NULL;
819 struct kvec iov[2];
820 int rc = 0;
821 int resp_buftype;
822 int unc_path_len;
823 struct TCP_Server_Info *server;
824 __le16 *unc_path = NULL;
825
826 cifs_dbg(FYI, "TCON\n");
827
828 if ((ses->server) && tree)
829 server = ses->server;
830 else
831 return -EIO;
832
833 if (tcon && tcon->bad_network_name)
834 return -ENOENT;
835
836 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
837 if (unc_path == NULL)
838 return -ENOMEM;
839
840 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
841 unc_path_len *= 2;
842 if (unc_path_len < 2) {
843 kfree(unc_path);
844 return -EINVAL;
845 }
846
847 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
848 if (rc) {
849 kfree(unc_path);
850 return rc;
851 }
852
853 if (tcon == NULL) {
854
855 req->hdr.SessionId = ses->Suid;
856
857
858 }
859
860 iov[0].iov_base = (char *)req;
861
862 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
863
864
865 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
866 - 1 - 4 );
867 req->PathLength = cpu_to_le16(unc_path_len - 2);
868 iov[1].iov_base = unc_path;
869 iov[1].iov_len = unc_path_len;
870
871 inc_rfc1001_len(req, unc_path_len - 1 );
872
873 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
874 rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base;
875
876 if (rc != 0) {
877 if (tcon) {
878 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
879 tcon->need_reconnect = true;
880 }
881 goto tcon_error_exit;
882 }
883
884 if (tcon == NULL) {
885 ses->ipc_tid = rsp->hdr.TreeId;
886 goto tcon_exit;
887 }
888
889 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
890 cifs_dbg(FYI, "connection to disk share\n");
891 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
892 tcon->ipc = true;
893 cifs_dbg(FYI, "connection to pipe share\n");
894 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
895 tcon->print = true;
896 cifs_dbg(FYI, "connection to printer\n");
897 } else {
898 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
899 rc = -EOPNOTSUPP;
900 goto tcon_error_exit;
901 }
902
903 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
904 tcon->capabilities = rsp->Capabilities;
905 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
906 tcon->tidStatus = CifsGood;
907 tcon->need_reconnect = false;
908 tcon->tid = rsp->hdr.TreeId;
909 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
910
911 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
912 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
913 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
914 init_copy_chunk_defaults(tcon);
915 if (tcon->ses->server->ops->validate_negotiate)
916 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
917tcon_exit:
918 free_rsp_buf(resp_buftype, rsp);
919 kfree(unc_path);
920 return rc;
921
922tcon_error_exit:
923 if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) {
924 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
925 tcon->bad_network_name = true;
926 }
927 goto tcon_exit;
928}
929
930int
931SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
932{
933 struct smb2_tree_disconnect_req *req;
934 int rc = 0;
935 struct TCP_Server_Info *server;
936 struct cifs_ses *ses = tcon->ses;
937
938 cifs_dbg(FYI, "Tree Disconnect\n");
939
940 if (ses && (ses->server))
941 server = ses->server;
942 else
943 return -EIO;
944
945 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
946 return 0;
947
948 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
949 if (rc)
950 return rc;
951
952 rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0);
953 if (rc)
954 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
955
956 return rc;
957}
958
959
960static struct create_durable *
961create_durable_buf(void)
962{
963 struct create_durable *buf;
964
965 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
966 if (!buf)
967 return NULL;
968
969 buf->ccontext.DataOffset = cpu_to_le16(offsetof
970 (struct create_durable, Data));
971 buf->ccontext.DataLength = cpu_to_le32(16);
972 buf->ccontext.NameOffset = cpu_to_le16(offsetof
973 (struct create_durable, Name));
974 buf->ccontext.NameLength = cpu_to_le16(4);
975
976 buf->Name[0] = 'D';
977 buf->Name[1] = 'H';
978 buf->Name[2] = 'n';
979 buf->Name[3] = 'Q';
980 return buf;
981}
982
983static struct create_durable *
984create_reconnect_durable_buf(struct cifs_fid *fid)
985{
986 struct create_durable *buf;
987
988 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
989 if (!buf)
990 return NULL;
991
992 buf->ccontext.DataOffset = cpu_to_le16(offsetof
993 (struct create_durable, Data));
994 buf->ccontext.DataLength = cpu_to_le32(16);
995 buf->ccontext.NameOffset = cpu_to_le16(offsetof
996 (struct create_durable, Name));
997 buf->ccontext.NameLength = cpu_to_le16(4);
998 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
999 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
1000
1001 buf->Name[0] = 'D';
1002 buf->Name[1] = 'H';
1003 buf->Name[2] = 'n';
1004 buf->Name[3] = 'C';
1005 return buf;
1006}
1007
1008static __u8
1009parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
1010 unsigned int *epoch)
1011{
1012 char *data_offset;
1013 struct create_context *cc;
1014 unsigned int next = 0;
1015 char *name;
1016
1017 data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
1018 cc = (struct create_context *)data_offset;
1019 do {
1020 cc = (struct create_context *)((char *)cc + next);
1021 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
1022 if (le16_to_cpu(cc->NameLength) != 4 ||
1023 strncmp(name, "RqLs", 4)) {
1024 next = le32_to_cpu(cc->Next);
1025 continue;
1026 }
1027 return server->ops->parse_lease_buf(cc, epoch);
1028 } while (next != 0);
1029
1030 return 0;
1031}
1032
1033static int
1034add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1035 unsigned int *num_iovec, __u8 *oplock)
1036{
1037 struct smb2_create_req *req = iov[0].iov_base;
1038 unsigned int num = *num_iovec;
1039
1040 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
1041 if (iov[num].iov_base == NULL)
1042 return -ENOMEM;
1043 iov[num].iov_len = server->vals->create_lease_size;
1044 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1045 if (!req->CreateContextsOffset)
1046 req->CreateContextsOffset = cpu_to_le32(
1047 sizeof(struct smb2_create_req) - 4 +
1048 iov[num - 1].iov_len);
1049 le32_add_cpu(&req->CreateContextsLength,
1050 server->vals->create_lease_size);
1051 inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
1052 *num_iovec = num + 1;
1053 return 0;
1054}
1055
1056static int
1057add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1058 struct cifs_open_parms *oparms)
1059{
1060 struct smb2_create_req *req = iov[0].iov_base;
1061 unsigned int num = *num_iovec;
1062
1063 if (oparms->reconnect) {
1064 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1065
1066 oparms->reconnect = false;
1067 } else
1068 iov[num].iov_base = create_durable_buf();
1069 if (iov[num].iov_base == NULL)
1070 return -ENOMEM;
1071 iov[num].iov_len = sizeof(struct create_durable);
1072 if (!req->CreateContextsOffset)
1073 req->CreateContextsOffset =
1074 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1075 iov[1].iov_len);
1076 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
1077 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
1078 *num_iovec = num + 1;
1079 return 0;
1080}
1081
1082int
1083SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
1084 __u8 *oplock, struct smb2_file_all_info *buf,
1085 struct smb2_err_rsp **err_buf)
1086{
1087 struct smb2_create_req *req;
1088 struct smb2_create_rsp *rsp;
1089 struct TCP_Server_Info *server;
1090 struct cifs_tcon *tcon = oparms->tcon;
1091 struct cifs_ses *ses = tcon->ses;
1092 struct kvec iov[4];
1093 int resp_buftype;
1094 int uni_path_len;
1095 __le16 *copy_path = NULL;
1096 int copy_size;
1097 int rc = 0;
1098 unsigned int num_iovecs = 2;
1099 __u32 file_attributes = 0;
1100 char *dhc_buf = NULL, *lc_buf = NULL;
1101
1102 cifs_dbg(FYI, "create/open\n");
1103
1104 if (ses && (ses->server))
1105 server = ses->server;
1106 else
1107 return -EIO;
1108
1109 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
1110 if (rc)
1111 return rc;
1112
1113 if (oparms->create_options & CREATE_OPTION_READONLY)
1114 file_attributes |= ATTR_READONLY;
1115
1116 req->ImpersonationLevel = IL_IMPERSONATION;
1117 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
1118
1119 req->FileAttributes = cpu_to_le32(file_attributes);
1120 req->ShareAccess = FILE_SHARE_ALL_LE;
1121 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1122 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
1123 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
1124
1125 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
1126
1127 iov[0].iov_base = (char *)req;
1128
1129 iov[0].iov_len = get_rfc1002_length(req) + 4;
1130
1131
1132 req->NameLength = cpu_to_le16(uni_path_len - 2);
1133
1134 iov[0].iov_len--;
1135 if (uni_path_len % 8 != 0) {
1136 copy_size = uni_path_len / 8 * 8;
1137 if (copy_size < uni_path_len)
1138 copy_size += 8;
1139
1140 copy_path = kzalloc(copy_size, GFP_KERNEL);
1141 if (!copy_path)
1142 return -ENOMEM;
1143 memcpy((char *)copy_path, (const char *)path,
1144 uni_path_len);
1145 uni_path_len = copy_size;
1146 path = copy_path;
1147 }
1148
1149 iov[1].iov_len = uni_path_len;
1150 iov[1].iov_base = path;
1151
1152 inc_rfc1001_len(req, uni_path_len - 1);
1153
1154 if (!server->oplocks)
1155 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1156
1157 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
1158 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1159 req->RequestedOplockLevel = *oplock;
1160 else {
1161 rc = add_lease_context(server, iov, &num_iovecs, oplock);
1162 if (rc) {
1163 cifs_small_buf_release(req);
1164 kfree(copy_path);
1165 return rc;
1166 }
1167 lc_buf = iov[num_iovecs-1].iov_base;
1168 }
1169
1170 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1171
1172 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
1173 struct create_context *ccontext =
1174 (struct create_context *)iov[num_iovecs-1].iov_base;
1175 ccontext->Next =
1176 cpu_to_le32(server->vals->create_lease_size);
1177 }
1178 rc = add_durable_context(iov, &num_iovecs, oparms);
1179 if (rc) {
1180 cifs_small_buf_release(req);
1181 kfree(copy_path);
1182 kfree(lc_buf);
1183 return rc;
1184 }
1185 dhc_buf = iov[num_iovecs-1].iov_base;
1186 }
1187
1188 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1189 rsp = (struct smb2_create_rsp *)iov[0].iov_base;
1190
1191 if (rc != 0) {
1192 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
1193 if (err_buf)
1194 *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
1195 GFP_KERNEL);
1196 goto creat_exit;
1197 }
1198
1199 oparms->fid->persistent_fid = rsp->PersistentFileId;
1200 oparms->fid->volatile_fid = rsp->VolatileFileId;
1201
1202 if (buf) {
1203 memcpy(buf, &rsp->CreationTime, 32);
1204 buf->AllocationSize = rsp->AllocationSize;
1205 buf->EndOfFile = rsp->EndofFile;
1206 buf->Attributes = rsp->FileAttributes;
1207 buf->NumberOfLinks = cpu_to_le32(1);
1208 buf->DeletePending = 0;
1209 }
1210
1211 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
1212 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
1213 else
1214 *oplock = rsp->OplockLevel;
1215creat_exit:
1216 kfree(copy_path);
1217 kfree(lc_buf);
1218 kfree(dhc_buf);
1219 free_rsp_buf(resp_buftype, rsp);
1220 return rc;
1221}
1222
1223
1224
1225
1226int
1227SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1228 u64 volatile_fid, u32 opcode, bool is_fsctl, char *in_data,
1229 u32 indatalen, char **out_data, u32 *plen )
1230{
1231 struct smb2_ioctl_req *req;
1232 struct smb2_ioctl_rsp *rsp;
1233 struct TCP_Server_Info *server;
1234 struct cifs_ses *ses = tcon->ses;
1235 struct kvec iov[2];
1236 int resp_buftype;
1237 int num_iovecs;
1238 int rc = 0;
1239
1240 cifs_dbg(FYI, "SMB2 IOCTL\n");
1241
1242 *out_data = NULL;
1243
1244 if (plen)
1245 *plen = 0;
1246
1247 if (ses && (ses->server))
1248 server = ses->server;
1249 else
1250 return -EIO;
1251
1252 rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req);
1253 if (rc)
1254 return rc;
1255
1256 req->CtlCode = cpu_to_le32(opcode);
1257 req->PersistentFileId = persistent_fid;
1258 req->VolatileFileId = volatile_fid;
1259
1260 if (indatalen) {
1261 req->InputCount = cpu_to_le32(indatalen);
1262
1263 req->InputOffset =
1264 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4);
1265 iov[1].iov_base = in_data;
1266 iov[1].iov_len = indatalen;
1267 num_iovecs = 2;
1268 } else
1269 num_iovecs = 1;
1270
1271 req->OutputOffset = 0;
1272 req->OutputCount = 0;
1273
1274
1275
1276
1277
1278
1279
1280 req->MaxOutputResponse = cpu_to_le32(0xFF00);
1281
1282 if (is_fsctl)
1283 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
1284 else
1285 req->Flags = 0;
1286
1287 iov[0].iov_base = (char *)req;
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299 if (indatalen) {
1300 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1301 inc_rfc1001_len(req, indatalen - 1);
1302 } else
1303 iov[0].iov_len = get_rfc1002_length(req) + 4;
1304
1305
1306 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1307 rsp = (struct smb2_ioctl_rsp *)iov[0].iov_base;
1308
1309 if ((rc != 0) && (rc != -EINVAL)) {
1310 if (tcon)
1311 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1312 goto ioctl_exit;
1313 } else if (rc == -EINVAL) {
1314 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
1315 (opcode != FSCTL_SRV_COPYCHUNK)) {
1316 if (tcon)
1317 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1318 goto ioctl_exit;
1319 }
1320 }
1321
1322
1323 if ((plen == NULL) || (out_data == NULL))
1324 goto ioctl_exit;
1325
1326 *plen = le32_to_cpu(rsp->OutputCount);
1327
1328
1329 if (*plen == 0)
1330 goto ioctl_exit;
1331 else if (*plen > 0xFF00) {
1332 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
1333 *plen = 0;
1334 rc = -EIO;
1335 goto ioctl_exit;
1336 }
1337
1338 if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
1339 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
1340 le32_to_cpu(rsp->OutputOffset));
1341 *plen = 0;
1342 rc = -EIO;
1343 goto ioctl_exit;
1344 }
1345
1346 *out_data = kmalloc(*plen, GFP_KERNEL);
1347 if (*out_data == NULL) {
1348 rc = -ENOMEM;
1349 goto ioctl_exit;
1350 }
1351
1352 memcpy(*out_data, rsp->hdr.ProtocolId + le32_to_cpu(rsp->OutputOffset),
1353 *plen);
1354ioctl_exit:
1355 free_rsp_buf(resp_buftype, rsp);
1356 return rc;
1357}
1358
1359
1360
1361
1362
1363int
1364SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1365 u64 persistent_fid, u64 volatile_fid)
1366{
1367 int rc;
1368 struct compress_ioctl fsctl_input;
1369 char *ret_data = NULL;
1370
1371 fsctl_input.CompressionState =
1372 __constant_cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
1373
1374 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1375 FSCTL_SET_COMPRESSION, true ,
1376 (char *)&fsctl_input ,
1377 2 , &ret_data , NULL);
1378
1379 cifs_dbg(FYI, "set compression rc %d\n", rc);
1380
1381 return rc;
1382}
1383
1384int
1385SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1386 u64 persistent_fid, u64 volatile_fid)
1387{
1388 struct smb2_close_req *req;
1389 struct smb2_close_rsp *rsp;
1390 struct TCP_Server_Info *server;
1391 struct cifs_ses *ses = tcon->ses;
1392 struct kvec iov[1];
1393 int resp_buftype;
1394 int rc = 0;
1395
1396 cifs_dbg(FYI, "Close\n");
1397
1398 if (ses && (ses->server))
1399 server = ses->server;
1400 else
1401 return -EIO;
1402
1403 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1404 if (rc)
1405 return rc;
1406
1407 req->PersistentFileId = persistent_fid;
1408 req->VolatileFileId = volatile_fid;
1409
1410 iov[0].iov_base = (char *)req;
1411
1412 iov[0].iov_len = get_rfc1002_length(req) + 4;
1413
1414 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1415 rsp = (struct smb2_close_rsp *)iov[0].iov_base;
1416
1417 if (rc != 0) {
1418 if (tcon)
1419 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
1420 goto close_exit;
1421 }
1422
1423
1424
1425close_exit:
1426 free_rsp_buf(resp_buftype, rsp);
1427 return rc;
1428}
1429
1430static int
1431validate_buf(unsigned int offset, unsigned int buffer_length,
1432 struct smb2_hdr *hdr, unsigned int min_buf_size)
1433
1434{
1435 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
1436 char *end_of_smb = smb_len + 4 + (char *)hdr;
1437 char *begin_of_buf = 4 + offset + (char *)hdr;
1438 char *end_of_buf = begin_of_buf + buffer_length;
1439
1440
1441 if (buffer_length < min_buf_size) {
1442 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
1443 buffer_length, min_buf_size);
1444 return -EINVAL;
1445 }
1446
1447
1448 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
1449 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
1450 buffer_length, smb_len);
1451 return -EINVAL;
1452 }
1453
1454 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
1455 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
1456 return -EINVAL;
1457 }
1458
1459 return 0;
1460}
1461
1462
1463
1464
1465
1466static int
1467validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
1468 struct smb2_hdr *hdr, unsigned int minbufsize,
1469 char *data)
1470
1471{
1472 char *begin_of_buf = 4 + offset + (char *)hdr;
1473 int rc;
1474
1475 if (!data)
1476 return -EINVAL;
1477
1478 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
1479 if (rc)
1480 return rc;
1481
1482 memcpy(data, begin_of_buf, buffer_length);
1483
1484 return 0;
1485}
1486
1487static int
1488query_info(const unsigned int xid, struct cifs_tcon *tcon,
1489 u64 persistent_fid, u64 volatile_fid, u8 info_class,
1490 size_t output_len, size_t min_len, void *data)
1491{
1492 struct smb2_query_info_req *req;
1493 struct smb2_query_info_rsp *rsp = NULL;
1494 struct kvec iov[2];
1495 int rc = 0;
1496 int resp_buftype;
1497 struct TCP_Server_Info *server;
1498 struct cifs_ses *ses = tcon->ses;
1499
1500 cifs_dbg(FYI, "Query Info\n");
1501
1502 if (ses && (ses->server))
1503 server = ses->server;
1504 else
1505 return -EIO;
1506
1507 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
1508 if (rc)
1509 return rc;
1510
1511 req->InfoType = SMB2_O_INFO_FILE;
1512 req->FileInfoClass = info_class;
1513 req->PersistentFileId = persistent_fid;
1514 req->VolatileFileId = volatile_fid;
1515
1516 req->InputBufferOffset =
1517 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
1518 req->OutputBufferLength = cpu_to_le32(output_len);
1519
1520 iov[0].iov_base = (char *)req;
1521
1522 iov[0].iov_len = get_rfc1002_length(req) + 4;
1523
1524 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1525 rsp = (struct smb2_query_info_rsp *)iov[0].iov_base;
1526
1527 if (rc) {
1528 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
1529 goto qinf_exit;
1530 }
1531
1532 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
1533 le32_to_cpu(rsp->OutputBufferLength),
1534 &rsp->hdr, min_len, data);
1535
1536qinf_exit:
1537 free_rsp_buf(resp_buftype, rsp);
1538 return rc;
1539}
1540
1541int
1542SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
1543 u64 persistent_fid, u64 volatile_fid,
1544 struct smb2_file_all_info *data)
1545{
1546 return query_info(xid, tcon, persistent_fid, volatile_fid,
1547 FILE_ALL_INFORMATION,
1548 sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
1549 sizeof(struct smb2_file_all_info), data);
1550}
1551
1552int
1553SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
1554 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
1555{
1556 return query_info(xid, tcon, persistent_fid, volatile_fid,
1557 FILE_INTERNAL_INFORMATION,
1558 sizeof(struct smb2_file_internal_info),
1559 sizeof(struct smb2_file_internal_info), uniqueid);
1560}
1561
1562
1563
1564
1565
1566
1567
1568
1569static void
1570smb2_echo_callback(struct mid_q_entry *mid)
1571{
1572 struct TCP_Server_Info *server = mid->callback_data;
1573 struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf;
1574 unsigned int credits_received = 1;
1575
1576 if (mid->mid_state == MID_RESPONSE_RECEIVED)
1577 credits_received = le16_to_cpu(smb2->hdr.CreditRequest);
1578
1579 DeleteMidQEntry(mid);
1580 add_credits(server, credits_received, CIFS_ECHO_OP);
1581}
1582
1583int
1584SMB2_echo(struct TCP_Server_Info *server)
1585{
1586 struct smb2_echo_req *req;
1587 int rc = 0;
1588 struct kvec iov;
1589 struct smb_rqst rqst = { .rq_iov = &iov,
1590 .rq_nvec = 1 };
1591
1592 cifs_dbg(FYI, "In echo request\n");
1593
1594 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
1595 if (rc)
1596 return rc;
1597
1598 req->hdr.CreditRequest = cpu_to_le16(1);
1599
1600 iov.iov_base = (char *)req;
1601
1602 iov.iov_len = get_rfc1002_length(req) + 4;
1603
1604 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server,
1605 CIFS_ECHO_OP);
1606 if (rc)
1607 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
1608
1609 cifs_small_buf_release(req);
1610 return rc;
1611}
1612
1613int
1614SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1615 u64 volatile_fid)
1616{
1617 struct smb2_flush_req *req;
1618 struct TCP_Server_Info *server;
1619 struct cifs_ses *ses = tcon->ses;
1620 struct kvec iov[1];
1621 int resp_buftype;
1622 int rc = 0;
1623
1624 cifs_dbg(FYI, "Flush\n");
1625
1626 if (ses && (ses->server))
1627 server = ses->server;
1628 else
1629 return -EIO;
1630
1631 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
1632 if (rc)
1633 return rc;
1634
1635 req->PersistentFileId = persistent_fid;
1636 req->VolatileFileId = volatile_fid;
1637
1638 iov[0].iov_base = (char *)req;
1639
1640 iov[0].iov_len = get_rfc1002_length(req) + 4;
1641
1642 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1643
1644 if ((rc != 0) && tcon)
1645 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
1646
1647 free_rsp_buf(resp_buftype, iov[0].iov_base);
1648 return rc;
1649}
1650
1651
1652
1653
1654
1655static int
1656smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms,
1657 unsigned int remaining_bytes, int request_type)
1658{
1659 int rc = -EACCES;
1660 struct smb2_read_req *req = NULL;
1661
1662 rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req);
1663 if (rc)
1664 return rc;
1665 if (io_parms->tcon->ses->server == NULL)
1666 return -ECONNABORTED;
1667
1668 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1669
1670 req->PersistentFileId = io_parms->persistent_fid;
1671 req->VolatileFileId = io_parms->volatile_fid;
1672 req->ReadChannelInfoOffset = 0;
1673 req->ReadChannelInfoLength = 0;
1674 req->Channel = 0;
1675 req->MinimumCount = 0;
1676 req->Length = cpu_to_le32(io_parms->length);
1677 req->Offset = cpu_to_le64(io_parms->offset);
1678
1679 if (request_type & CHAINED_REQUEST) {
1680 if (!(request_type & END_OF_CHAIN)) {
1681
1682 req->hdr.NextCommand =
1683 cpu_to_le32(get_rfc1002_length(req) + 4);
1684 } else
1685 req->hdr.NextCommand = 0;
1686 if (request_type & RELATED_REQUEST) {
1687 req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
1688
1689
1690
1691
1692 req->hdr.SessionId = 0xFFFFFFFF;
1693 req->hdr.TreeId = 0xFFFFFFFF;
1694 req->PersistentFileId = 0xFFFFFFFF;
1695 req->VolatileFileId = 0xFFFFFFFF;
1696 }
1697 }
1698 if (remaining_bytes > io_parms->length)
1699 req->RemainingBytes = cpu_to_le32(remaining_bytes);
1700 else
1701 req->RemainingBytes = 0;
1702
1703 iov[0].iov_base = (char *)req;
1704
1705 iov[0].iov_len = get_rfc1002_length(req) + 4;
1706 return rc;
1707}
1708
1709static void
1710smb2_readv_callback(struct mid_q_entry *mid)
1711{
1712 struct cifs_readdata *rdata = mid->callback_data;
1713 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
1714 struct TCP_Server_Info *server = tcon->ses->server;
1715 struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base;
1716 unsigned int credits_received = 1;
1717 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
1718 .rq_nvec = 1,
1719 .rq_pages = rdata->pages,
1720 .rq_npages = rdata->nr_pages,
1721 .rq_pagesz = rdata->pagesz,
1722 .rq_tailsz = rdata->tailsz };
1723
1724 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1725 __func__, mid->mid, mid->mid_state, rdata->result,
1726 rdata->bytes);
1727
1728 switch (mid->mid_state) {
1729 case MID_RESPONSE_RECEIVED:
1730 credits_received = le16_to_cpu(buf->CreditRequest);
1731
1732 if (server->sign) {
1733 int rc;
1734
1735 rc = smb2_verify_signature(&rqst, server);
1736 if (rc)
1737 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
1738 rc);
1739 }
1740
1741 task_io_account_read(rdata->bytes);
1742 cifs_stats_bytes_read(tcon, rdata->bytes);
1743 break;
1744 case MID_REQUEST_SUBMITTED:
1745 case MID_RETRY_NEEDED:
1746 rdata->result = -EAGAIN;
1747 break;
1748 default:
1749 if (rdata->result != -ENODATA)
1750 rdata->result = -EIO;
1751 }
1752
1753 if (rdata->result)
1754 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
1755
1756 queue_work(cifsiod_wq, &rdata->work);
1757 DeleteMidQEntry(mid);
1758 add_credits(server, credits_received, 0);
1759}
1760
1761
1762int
1763smb2_async_readv(struct cifs_readdata *rdata)
1764{
1765 int rc;
1766 struct smb2_hdr *buf;
1767 struct cifs_io_parms io_parms;
1768 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
1769 .rq_nvec = 1 };
1770
1771 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
1772 __func__, rdata->offset, rdata->bytes);
1773
1774 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
1775 io_parms.offset = rdata->offset;
1776 io_parms.length = rdata->bytes;
1777 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
1778 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
1779 io_parms.pid = rdata->pid;
1780 rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0);
1781 if (rc)
1782 return rc;
1783
1784 buf = (struct smb2_hdr *)rdata->iov.iov_base;
1785
1786 rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4;
1787
1788 kref_get(&rdata->refcount);
1789 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
1790 cifs_readv_receive, smb2_readv_callback,
1791 rdata, 0);
1792 if (rc) {
1793 kref_put(&rdata->refcount, cifs_readdata_release);
1794 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
1795 }
1796
1797 cifs_small_buf_release(buf);
1798 return rc;
1799}
1800
1801int
1802SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
1803 unsigned int *nbytes, char **buf, int *buf_type)
1804{
1805 int resp_buftype, rc = -EACCES;
1806 struct smb2_read_rsp *rsp = NULL;
1807 struct kvec iov[1];
1808
1809 *nbytes = 0;
1810 rc = smb2_new_read_req(iov, io_parms, 0, 0);
1811 if (rc)
1812 return rc;
1813
1814 rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1,
1815 &resp_buftype, CIFS_LOG_ERROR);
1816
1817 rsp = (struct smb2_read_rsp *)iov[0].iov_base;
1818
1819 if (rsp->hdr.Status == STATUS_END_OF_FILE) {
1820 free_rsp_buf(resp_buftype, iov[0].iov_base);
1821 return 0;
1822 }
1823
1824 if (rc) {
1825 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
1826 cifs_dbg(VFS, "Send error in read = %d\n", rc);
1827 } else {
1828 *nbytes = le32_to_cpu(rsp->DataLength);
1829 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
1830 (*nbytes > io_parms->length)) {
1831 cifs_dbg(FYI, "bad length %d for count %d\n",
1832 *nbytes, io_parms->length);
1833 rc = -EIO;
1834 *nbytes = 0;
1835 }
1836 }
1837
1838 if (*buf) {
1839 memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset,
1840 *nbytes);
1841 free_rsp_buf(resp_buftype, iov[0].iov_base);
1842 } else if (resp_buftype != CIFS_NO_BUFFER) {
1843 *buf = iov[0].iov_base;
1844 if (resp_buftype == CIFS_SMALL_BUFFER)
1845 *buf_type = CIFS_SMALL_BUFFER;
1846 else if (resp_buftype == CIFS_LARGE_BUFFER)
1847 *buf_type = CIFS_LARGE_BUFFER;
1848 }
1849 return rc;
1850}
1851
1852
1853
1854
1855
1856static void
1857smb2_writev_callback(struct mid_q_entry *mid)
1858{
1859 struct cifs_writedata *wdata = mid->callback_data;
1860 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1861 unsigned int written;
1862 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
1863 unsigned int credits_received = 1;
1864
1865 switch (mid->mid_state) {
1866 case MID_RESPONSE_RECEIVED:
1867 credits_received = le16_to_cpu(rsp->hdr.CreditRequest);
1868 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
1869 if (wdata->result != 0)
1870 break;
1871
1872 written = le32_to_cpu(rsp->DataLength);
1873
1874
1875
1876
1877
1878
1879 if (written > wdata->bytes)
1880 written &= 0xFFFF;
1881
1882 if (written < wdata->bytes)
1883 wdata->result = -ENOSPC;
1884 else
1885 wdata->bytes = written;
1886 break;
1887 case MID_REQUEST_SUBMITTED:
1888 case MID_RETRY_NEEDED:
1889 wdata->result = -EAGAIN;
1890 break;
1891 default:
1892 wdata->result = -EIO;
1893 break;
1894 }
1895
1896 if (wdata->result)
1897 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1898
1899 queue_work(cifsiod_wq, &wdata->work);
1900 DeleteMidQEntry(mid);
1901 add_credits(tcon->ses->server, credits_received, 0);
1902}
1903
1904
1905int
1906smb2_async_writev(struct cifs_writedata *wdata,
1907 void (*release)(struct kref *kref))
1908{
1909 int rc = -EACCES;
1910 struct smb2_write_req *req = NULL;
1911 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1912 struct kvec iov;
1913 struct smb_rqst rqst;
1914
1915 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
1916 if (rc)
1917 goto async_writev_out;
1918
1919 req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid);
1920
1921 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
1922 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
1923 req->WriteChannelInfoOffset = 0;
1924 req->WriteChannelInfoLength = 0;
1925 req->Channel = 0;
1926 req->Offset = cpu_to_le64(wdata->offset);
1927
1928 req->DataOffset = cpu_to_le16(
1929 offsetof(struct smb2_write_req, Buffer) - 4);
1930 req->RemainingBytes = 0;
1931
1932
1933 iov.iov_len = get_rfc1002_length(req) + 4 - 1;
1934 iov.iov_base = req;
1935
1936 rqst.rq_iov = &iov;
1937 rqst.rq_nvec = 1;
1938 rqst.rq_pages = wdata->pages;
1939 rqst.rq_npages = wdata->nr_pages;
1940 rqst.rq_pagesz = wdata->pagesz;
1941 rqst.rq_tailsz = wdata->tailsz;
1942
1943 cifs_dbg(FYI, "async write at %llu %u bytes\n",
1944 wdata->offset, wdata->bytes);
1945
1946 req->Length = cpu_to_le32(wdata->bytes);
1947
1948 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 );
1949
1950 kref_get(&wdata->refcount);
1951 rc = cifs_call_async(tcon->ses->server, &rqst, NULL,
1952 smb2_writev_callback, wdata, 0);
1953
1954 if (rc) {
1955 kref_put(&wdata->refcount, release);
1956 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1957 }
1958
1959async_writev_out:
1960 cifs_small_buf_release(req);
1961 return rc;
1962}
1963
1964
1965
1966
1967
1968
1969
1970int
1971SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
1972 unsigned int *nbytes, struct kvec *iov, int n_vec)
1973{
1974 int rc = 0;
1975 struct smb2_write_req *req = NULL;
1976 struct smb2_write_rsp *rsp = NULL;
1977 int resp_buftype;
1978 *nbytes = 0;
1979
1980 if (n_vec < 1)
1981 return rc;
1982
1983 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
1984 if (rc)
1985 return rc;
1986
1987 if (io_parms->tcon->ses->server == NULL)
1988 return -ECONNABORTED;
1989
1990 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1991
1992 req->PersistentFileId = io_parms->persistent_fid;
1993 req->VolatileFileId = io_parms->volatile_fid;
1994 req->WriteChannelInfoOffset = 0;
1995 req->WriteChannelInfoLength = 0;
1996 req->Channel = 0;
1997 req->Length = cpu_to_le32(io_parms->length);
1998 req->Offset = cpu_to_le64(io_parms->offset);
1999
2000 req->DataOffset = cpu_to_le16(
2001 offsetof(struct smb2_write_req, Buffer) - 4);
2002 req->RemainingBytes = 0;
2003
2004 iov[0].iov_base = (char *)req;
2005
2006 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2007
2008
2009 inc_rfc1001_len(req, io_parms->length - 1 );
2010
2011 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
2012 &resp_buftype, 0);
2013 rsp = (struct smb2_write_rsp *)iov[0].iov_base;
2014
2015 if (rc) {
2016 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
2017 cifs_dbg(VFS, "Send error in write = %d\n", rc);
2018 } else
2019 *nbytes = le32_to_cpu(rsp->DataLength);
2020
2021 free_rsp_buf(resp_buftype, rsp);
2022 return rc;
2023}
2024
2025static unsigned int
2026num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
2027{
2028 int len;
2029 unsigned int entrycount = 0;
2030 unsigned int next_offset = 0;
2031 FILE_DIRECTORY_INFO *entryptr;
2032
2033 if (bufstart == NULL)
2034 return 0;
2035
2036 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
2037
2038 while (1) {
2039 entryptr = (FILE_DIRECTORY_INFO *)
2040 ((char *)entryptr + next_offset);
2041
2042 if ((char *)entryptr + size > end_of_buf) {
2043 cifs_dbg(VFS, "malformed search entry would overflow\n");
2044 break;
2045 }
2046
2047 len = le32_to_cpu(entryptr->FileNameLength);
2048 if ((char *)entryptr + len + size > end_of_buf) {
2049 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
2050 end_of_buf);
2051 break;
2052 }
2053
2054 *lastentry = (char *)entryptr;
2055 entrycount++;
2056
2057 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
2058 if (!next_offset)
2059 break;
2060 }
2061
2062 return entrycount;
2063}
2064
2065
2066
2067
2068int
2069SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
2070 u64 persistent_fid, u64 volatile_fid, int index,
2071 struct cifs_search_info *srch_inf)
2072{
2073 struct smb2_query_directory_req *req;
2074 struct smb2_query_directory_rsp *rsp = NULL;
2075 struct kvec iov[2];
2076 int rc = 0;
2077 int len;
2078 int resp_buftype;
2079 unsigned char *bufptr;
2080 struct TCP_Server_Info *server;
2081 struct cifs_ses *ses = tcon->ses;
2082 __le16 asteriks = cpu_to_le16('*');
2083 char *end_of_smb;
2084 unsigned int output_size = CIFSMaxBufSize;
2085 size_t info_buf_size;
2086
2087 if (ses && (ses->server))
2088 server = ses->server;
2089 else
2090 return -EIO;
2091
2092 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
2093 if (rc)
2094 return rc;
2095
2096 switch (srch_inf->info_level) {
2097 case SMB_FIND_FILE_DIRECTORY_INFO:
2098 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
2099 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
2100 break;
2101 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
2102 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
2103 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
2104 break;
2105 default:
2106 cifs_dbg(VFS, "info level %u isn't supported\n",
2107 srch_inf->info_level);
2108 rc = -EINVAL;
2109 goto qdir_exit;
2110 }
2111
2112 req->FileIndex = cpu_to_le32(index);
2113 req->PersistentFileId = persistent_fid;
2114 req->VolatileFileId = volatile_fid;
2115
2116 len = 0x2;
2117 bufptr = req->Buffer;
2118 memcpy(bufptr, &asteriks, len);
2119
2120 req->FileNameOffset =
2121 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
2122 req->FileNameLength = cpu_to_le16(len);
2123
2124
2125
2126
2127 output_size = min_t(unsigned int, output_size, server->maxBuf);
2128 output_size = min_t(unsigned int, output_size, 2 << 15);
2129 req->OutputBufferLength = cpu_to_le32(output_size);
2130
2131 iov[0].iov_base = (char *)req;
2132
2133 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2134
2135 iov[1].iov_base = (char *)(req->Buffer);
2136 iov[1].iov_len = len;
2137
2138 inc_rfc1001_len(req, len - 1 );
2139
2140 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
2141 rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base;
2142
2143 if (rc) {
2144 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
2145 goto qdir_exit;
2146 }
2147
2148 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2149 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2150 info_buf_size);
2151 if (rc)
2152 goto qdir_exit;
2153
2154 srch_inf->unicode = true;
2155
2156 if (srch_inf->ntwrk_buf_start) {
2157 if (srch_inf->smallBuf)
2158 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
2159 else
2160 cifs_buf_release(srch_inf->ntwrk_buf_start);
2161 }
2162 srch_inf->ntwrk_buf_start = (char *)rsp;
2163 srch_inf->srch_entries_start = srch_inf->last_entry = 4 +
2164 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
2165
2166 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
2167 srch_inf->entries_in_buffer =
2168 num_entries(srch_inf->srch_entries_start, end_of_smb,
2169 &srch_inf->last_entry, info_buf_size);
2170 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
2171 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
2172 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
2173 srch_inf->srch_entries_start, srch_inf->last_entry);
2174 if (resp_buftype == CIFS_LARGE_BUFFER)
2175 srch_inf->smallBuf = false;
2176 else if (resp_buftype == CIFS_SMALL_BUFFER)
2177 srch_inf->smallBuf = true;
2178 else
2179 cifs_dbg(VFS, "illegal search buffer type\n");
2180
2181 if (rsp->hdr.Status == STATUS_NO_MORE_FILES)
2182 srch_inf->endOfSearch = 1;
2183 else
2184 srch_inf->endOfSearch = 0;
2185
2186 return rc;
2187
2188qdir_exit:
2189 free_rsp_buf(resp_buftype, rsp);
2190 return rc;
2191}
2192
2193static int
2194send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2195 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
2196 unsigned int num, void **data, unsigned int *size)
2197{
2198 struct smb2_set_info_req *req;
2199 struct smb2_set_info_rsp *rsp = NULL;
2200 struct kvec *iov;
2201 int rc = 0;
2202 int resp_buftype;
2203 unsigned int i;
2204 struct TCP_Server_Info *server;
2205 struct cifs_ses *ses = tcon->ses;
2206
2207 if (ses && (ses->server))
2208 server = ses->server;
2209 else
2210 return -EIO;
2211
2212 if (!num)
2213 return -EINVAL;
2214
2215 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
2216 if (!iov)
2217 return -ENOMEM;
2218
2219 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
2220 if (rc) {
2221 kfree(iov);
2222 return rc;
2223 }
2224
2225 req->hdr.ProcessId = cpu_to_le32(pid);
2226
2227 req->InfoType = SMB2_O_INFO_FILE;
2228 req->FileInfoClass = info_class;
2229 req->PersistentFileId = persistent_fid;
2230 req->VolatileFileId = volatile_fid;
2231
2232
2233 req->BufferOffset =
2234 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
2235 req->BufferLength = cpu_to_le32(*size);
2236
2237 inc_rfc1001_len(req, *size - 1 );
2238
2239 memcpy(req->Buffer, *data, *size);
2240
2241 iov[0].iov_base = (char *)req;
2242
2243 iov[0].iov_len = get_rfc1002_length(req) + 4;
2244
2245 for (i = 1; i < num; i++) {
2246 inc_rfc1001_len(req, size[i]);
2247 le32_add_cpu(&req->BufferLength, size[i]);
2248 iov[i].iov_base = (char *)data[i];
2249 iov[i].iov_len = size[i];
2250 }
2251
2252 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0);
2253 rsp = (struct smb2_set_info_rsp *)iov[0].iov_base;
2254
2255 if (rc != 0)
2256 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
2257
2258 free_rsp_buf(resp_buftype, rsp);
2259 kfree(iov);
2260 return rc;
2261}
2262
2263int
2264SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
2265 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2266{
2267 struct smb2_file_rename_info info;
2268 void **data;
2269 unsigned int size[2];
2270 int rc;
2271 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2272
2273 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2274 if (!data)
2275 return -ENOMEM;
2276
2277 info.ReplaceIfExists = 1;
2278
2279 info.RootDirectory = 0;
2280 info.FileNameLength = cpu_to_le32(len);
2281
2282 data[0] = &info;
2283 size[0] = sizeof(struct smb2_file_rename_info);
2284
2285 data[1] = target_file;
2286 size[1] = len + 2 ;
2287
2288 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
2289 current->tgid, FILE_RENAME_INFORMATION, 2, data,
2290 size);
2291 kfree(data);
2292 return rc;
2293}
2294
2295int
2296SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
2297 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2298{
2299 struct smb2_file_link_info info;
2300 void **data;
2301 unsigned int size[2];
2302 int rc;
2303 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2304
2305 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2306 if (!data)
2307 return -ENOMEM;
2308
2309 info.ReplaceIfExists = 0;
2310
2311 info.RootDirectory = 0;
2312 info.FileNameLength = cpu_to_le32(len);
2313
2314 data[0] = &info;
2315 size[0] = sizeof(struct smb2_file_link_info);
2316
2317 data[1] = target_file;
2318 size[1] = len + 2 ;
2319
2320 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
2321 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
2322 kfree(data);
2323 return rc;
2324}
2325
2326int
2327SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2328 u64 volatile_fid, u32 pid, __le64 *eof)
2329{
2330 struct smb2_file_eof_info info;
2331 void *data;
2332 unsigned int size;
2333
2334 info.EndOfFile = *eof;
2335
2336 data = &info;
2337 size = sizeof(struct smb2_file_eof_info);
2338
2339 return send_set_info(xid, tcon, persistent_fid, volatile_fid, pid,
2340 FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
2341}
2342
2343int
2344SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2345 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
2346{
2347 unsigned int size;
2348 size = sizeof(FILE_BASIC_INFO);
2349 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2350 current->tgid, FILE_BASIC_INFORMATION, 1,
2351 (void **)&buf, &size);
2352}
2353
2354int
2355SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
2356 const u64 persistent_fid, const u64 volatile_fid,
2357 __u8 oplock_level)
2358{
2359 int rc;
2360 struct smb2_oplock_break *req = NULL;
2361
2362 cifs_dbg(FYI, "SMB2_oplock_break\n");
2363 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2364
2365 if (rc)
2366 return rc;
2367
2368 req->VolatileFid = volatile_fid;
2369 req->PersistentFid = persistent_fid;
2370 req->OplockLevel = oplock_level;
2371 req->hdr.CreditRequest = cpu_to_le16(1);
2372
2373 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2374
2375
2376 if (rc) {
2377 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2378 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
2379 }
2380
2381 return rc;
2382}
2383
2384static void
2385copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
2386 struct kstatfs *kst)
2387{
2388 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
2389 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
2390 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
2391 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
2392 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
2393 return;
2394}
2395
2396static int
2397build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
2398 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
2399{
2400 int rc;
2401 struct smb2_query_info_req *req;
2402
2403 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
2404
2405 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
2406 return -EIO;
2407
2408 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2409 if (rc)
2410 return rc;
2411
2412 req->InfoType = SMB2_O_INFO_FILESYSTEM;
2413 req->FileInfoClass = level;
2414 req->PersistentFileId = persistent_fid;
2415 req->VolatileFileId = volatile_fid;
2416
2417 req->InputBufferOffset =
2418 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
2419 req->OutputBufferLength = cpu_to_le32(
2420 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
2421
2422 iov->iov_base = (char *)req;
2423
2424 iov->iov_len = get_rfc1002_length(req) + 4;
2425 return 0;
2426}
2427
2428int
2429SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
2430 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
2431{
2432 struct smb2_query_info_rsp *rsp = NULL;
2433 struct kvec iov;
2434 int rc = 0;
2435 int resp_buftype;
2436 struct cifs_ses *ses = tcon->ses;
2437 struct smb2_fs_full_size_info *info = NULL;
2438
2439 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
2440 sizeof(struct smb2_fs_full_size_info),
2441 persistent_fid, volatile_fid);
2442 if (rc)
2443 return rc;
2444
2445 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2446 if (rc) {
2447 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2448 goto qfsinf_exit;
2449 }
2450 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2451
2452 info = (struct smb2_fs_full_size_info *)(4 +
2453 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
2454 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2455 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2456 sizeof(struct smb2_fs_full_size_info));
2457 if (!rc)
2458 copy_fs_info_to_kstatfs(info, fsdata);
2459
2460qfsinf_exit:
2461 free_rsp_buf(resp_buftype, iov.iov_base);
2462 return rc;
2463}
2464
2465int
2466SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2467 u64 persistent_fid, u64 volatile_fid, int level)
2468{
2469 struct smb2_query_info_rsp *rsp = NULL;
2470 struct kvec iov;
2471 int rc = 0;
2472 int resp_buftype, max_len, min_len;
2473 struct cifs_ses *ses = tcon->ses;
2474 unsigned int rsp_len, offset;
2475
2476 if (level == FS_DEVICE_INFORMATION) {
2477 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2478 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2479 } else if (level == FS_ATTRIBUTE_INFORMATION) {
2480 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
2481 min_len = MIN_FS_ATTR_INFO_SIZE;
2482 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
2483 max_len = sizeof(struct smb3_fs_ss_info);
2484 min_len = sizeof(struct smb3_fs_ss_info);
2485 } else {
2486 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2487 return -EINVAL;
2488 }
2489
2490 rc = build_qfs_info_req(&iov, tcon, level, max_len,
2491 persistent_fid, volatile_fid);
2492 if (rc)
2493 return rc;
2494
2495 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2496 if (rc) {
2497 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2498 goto qfsattr_exit;
2499 }
2500 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2501
2502 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
2503 offset = le16_to_cpu(rsp->OutputBufferOffset);
2504 rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
2505 if (rc)
2506 goto qfsattr_exit;
2507
2508 if (level == FS_ATTRIBUTE_INFORMATION)
2509 memcpy(&tcon->fsAttrInfo, 4 + offset
2510 + (char *)&rsp->hdr, min_t(unsigned int,
2511 rsp_len, max_len));
2512 else if (level == FS_DEVICE_INFORMATION)
2513 memcpy(&tcon->fsDevInfo, 4 + offset
2514 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
2515 else if (level == FS_SECTOR_SIZE_INFORMATION) {
2516 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
2517 (4 + offset + (char *)&rsp->hdr);
2518 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
2519 tcon->perf_sector_size =
2520 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
2521 }
2522
2523qfsattr_exit:
2524 free_rsp_buf(resp_buftype, iov.iov_base);
2525 return rc;
2526}
2527
2528int
2529smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
2530 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2531 const __u32 num_lock, struct smb2_lock_element *buf)
2532{
2533 int rc = 0;
2534 struct smb2_lock_req *req = NULL;
2535 struct kvec iov[2];
2536 int resp_buf_type;
2537 unsigned int count;
2538
2539 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
2540
2541 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
2542 if (rc)
2543 return rc;
2544
2545 req->hdr.ProcessId = cpu_to_le32(pid);
2546 req->LockCount = cpu_to_le16(num_lock);
2547
2548 req->PersistentFileId = persist_fid;
2549 req->VolatileFileId = volatile_fid;
2550
2551 count = num_lock * sizeof(struct smb2_lock_element);
2552 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
2553
2554 iov[0].iov_base = (char *)req;
2555
2556 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
2557 iov[1].iov_base = (char *)buf;
2558 iov[1].iov_len = count;
2559
2560 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
2561 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP);
2562 if (rc) {
2563 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
2564 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
2565 }
2566
2567 return rc;
2568}
2569
2570int
2571SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
2572 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2573 const __u64 length, const __u64 offset, const __u32 lock_flags,
2574 const bool wait)
2575{
2576 struct smb2_lock_element lock;
2577
2578 lock.Offset = cpu_to_le64(offset);
2579 lock.Length = cpu_to_le64(length);
2580 lock.Flags = cpu_to_le32(lock_flags);
2581 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
2582 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
2583
2584 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
2585}
2586
2587int
2588SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
2589 __u8 *lease_key, const __le32 lease_state)
2590{
2591 int rc;
2592 struct smb2_lease_ack *req = NULL;
2593
2594 cifs_dbg(FYI, "SMB2_lease_break\n");
2595 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2596
2597 if (rc)
2598 return rc;
2599
2600 req->hdr.CreditRequest = cpu_to_le16(1);
2601 req->StructureSize = cpu_to_le16(36);
2602 inc_rfc1001_len(req, 12);
2603
2604 memcpy(req->LeaseKey, lease_key, 16);
2605 req->LeaseState = lease_state;
2606
2607 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2608
2609
2610 if (rc) {
2611 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2612 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
2613 }
2614
2615 return rc;
2616}
2617