4 * Copyright (C) International Business Machines Corp., 2009, 2013
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
9 * Contains the routines for constructing the SMB2 PDUs themselves
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.
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.
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
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 */
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>
41 #include "cifsproto.h"
42 #include "smb2proto.h"
43 #include "cifs_unicode.h"
44 #include "cifs_debug.h"
46 #include "smb2status.h"
49 #include "cifs_spnego.h"
52 * The following table defines the expected "StructureSize" of SMB2 requests
53 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
55 * Note that commands are defined in smb2pdu.h in le16 but the array below is
56 * indexed by command in host byte order.
58 static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
59 /* SMB2_NEGOTIATE */ 36,
60 /* SMB2_SESSION_SETUP */ 25,
62 /* SMB2_TREE_CONNECT */ 9,
63 /* SMB2_TREE_DISCONNECT */ 4,
73 /* SMB2_QUERY_DIRECTORY */ 33,
74 /* SMB2_CHANGE_NOTIFY */ 32,
75 /* SMB2_QUERY_INFO */ 41,
76 /* SMB2_SET_INFO */ 33,
77 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
82 smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd /* command */ ,
83 const struct cifs_tcon *tcon)
85 struct smb2_pdu *pdu = (struct smb2_pdu *)hdr;
86 char *temp = (char *)hdr;
87 /* lookup word count ie StructureSize from table */
88 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_cmd)];
91 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
92 * largest operations (Create)
96 /* Note this is only network field converted to big endian */
97 hdr->smb2_buf_length = cpu_to_be32(parmsize + sizeof(struct smb2_hdr)
98 - 4 /* RFC 1001 length field itself not counted */);
100 hdr->ProtocolId = SMB2_PROTO_NUMBER;
101 hdr->StructureSize = cpu_to_le16(64);
102 hdr->Command = smb2_cmd;
103 if (tcon && tcon->ses && tcon->ses->server) {
104 struct TCP_Server_Info *server = tcon->ses->server;
106 spin_lock(&server->req_lock);
107 /* Request up to 2 credits but don't go over the limit. */
108 if (server->credits >= server->max_credits)
109 hdr->CreditRequest = cpu_to_le16(0);
111 hdr->CreditRequest = cpu_to_le16(
112 min_t(int, server->max_credits -
113 server->credits, 2));
114 spin_unlock(&server->req_lock);
116 hdr->CreditRequest = cpu_to_le16(2);
118 hdr->ProcessId = cpu_to_le32((__u16)current->tgid);
123 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
124 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
125 if ((tcon->ses) && (tcon->ses->server) &&
126 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
127 hdr->CreditCharge = cpu_to_le16(1);
128 /* else CreditCharge MBZ */
130 hdr->TreeId = tcon->tid;
131 /* Uid is not converted */
133 hdr->SessionId = tcon->ses->Suid;
136 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
137 * to pass the path on the Open SMB prefixed by \\server\share.
138 * Not sure when we would need to do the augmented path (if ever) and
139 * setting this flag breaks the SMB2 open operation since it is
140 * illegal to send an empty path name (without \\server\share prefix)
141 * when the DFS flag is set in the SMB open header. We could
142 * consider setting the flag on all operations other than open
143 * but it is safer to net set it for now.
145 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
146 hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
148 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign)
149 hdr->Flags |= SMB2_FLAGS_SIGNED;
151 pdu->StructureSize2 = cpu_to_le16(parmsize);
156 smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
159 struct nls_table *nls_codepage;
160 struct cifs_ses *ses;
161 struct TCP_Server_Info *server;
164 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
165 * check for tcp and smb session status done differently
166 * for those three - in the calling routine.
171 if (smb2_command == SMB2_TREE_CONNECT)
174 if (tcon->tidStatus == CifsExiting) {
176 * only tree disconnect, open, and write,
177 * (and ulogoff which does not have tcon)
178 * are allowed as we start force umount.
180 if ((smb2_command != SMB2_WRITE) &&
181 (smb2_command != SMB2_CREATE) &&
182 (smb2_command != SMB2_TREE_DISCONNECT)) {
183 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
188 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
189 (!tcon->ses->server))
193 server = ses->server;
196 * Give demultiplex thread up to 10 seconds to reconnect, should be
197 * greater than cifs socket timeout which is 7 seconds
199 while (server->tcpStatus == CifsNeedReconnect) {
201 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
202 * here since they are implicitly done when session drops.
204 switch (smb2_command) {
206 * BB Should we keep oplock break and add flush to exceptions?
208 case SMB2_TREE_DISCONNECT:
211 case SMB2_OPLOCK_BREAK:
215 wait_event_interruptible_timeout(server->response_q,
216 (server->tcpStatus != CifsNeedReconnect), 10 * HZ);
218 /* are we still trying to reconnect? */
219 if (server->tcpStatus != CifsNeedReconnect)
223 * on "soft" mounts we wait once. Hard mounts keep
224 * retrying until process is killed or server comes
228 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
233 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
236 nls_codepage = load_nls_default();
239 * need to prevent multiple threads trying to simultaneously reconnect
240 * the same SMB session
242 mutex_lock(&tcon->ses->session_mutex);
243 rc = cifs_negotiate_protocol(0, tcon->ses);
244 if (!rc && tcon->ses->need_reconnect)
245 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
247 if (rc || !tcon->need_reconnect) {
248 mutex_unlock(&tcon->ses->session_mutex);
252 cifs_mark_open_files_invalid(tcon);
254 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
255 mutex_unlock(&tcon->ses->session_mutex);
257 if (tcon->use_persistent)
258 cifs_reopen_persistent_handles(tcon);
260 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
263 atomic_inc(&tconInfoReconnectCount);
266 * Check if handle based operation so we know whether we can continue
267 * or not without returning to caller to reset file handle.
270 * BB Is flush done by server on drop of tcp session? Should we special
271 * case it and skip above?
273 switch (smb2_command) {
279 case SMB2_QUERY_DIRECTORY:
280 case SMB2_CHANGE_NOTIFY:
281 case SMB2_QUERY_INFO:
285 unload_nls(nls_codepage);
290 * Allocate and return pointer to an SMB request hdr, and set basic
291 * SMB information in the SMB header. If the return code is zero, this
292 * function must have filled in request_buf pointer.
295 small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
300 rc = smb2_reconnect(smb2_command, tcon);
304 /* BB eventually switch this to SMB2 specific small buf size */
305 *request_buf = cifs_small_buf_get();
306 if (*request_buf == NULL) {
307 /* BB should we add a retry in here if not a writepage? */
311 smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon);
314 #ifdef CONFIG_CIFS_STATS2
315 uint16_t com_code = le16_to_cpu(smb2_command);
316 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
318 cifs_stats_inc(&tcon->num_smbs_sent);
324 #ifdef CONFIG_CIFS_SMB311
325 /* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
326 #define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
329 #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
330 #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
333 build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
335 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
336 pneg_ctxt->DataLength = cpu_to_le16(38);
337 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
338 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
339 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
340 pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
344 build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
346 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
347 pneg_ctxt->DataLength = cpu_to_le16(6);
348 pneg_ctxt->CipherCount = cpu_to_le16(2);
349 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
350 pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM;
354 assemble_neg_contexts(struct smb2_negotiate_req *req)
357 /* +4 is to account for the RFC1001 len field */
358 char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT + 4;
360 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
361 /* Add 2 to size to round to 8 byte boundary */
362 pneg_ctxt += 2 + sizeof(struct smb2_preauth_neg_context);
363 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
364 req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
365 req->NegotiateContextCount = cpu_to_le16(2);
366 inc_rfc1001_len(req, 4 + sizeof(struct smb2_preauth_neg_context) + 2
367 + sizeof(struct smb2_encryption_neg_context)); /* calculate hash */
370 static void assemble_neg_contexts(struct smb2_negotiate_req *req)
379 * SMB2 Worker functions follow:
381 * The general structure of the worker functions is:
382 * 1) Call smb2_init (assembles SMB2 header)
383 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
384 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
385 * 4) Decode SMB2 command specific fields in the fixed length area
386 * 5) Decode variable length data area (if any for this SMB2 command type)
387 * 6) Call free smb buffer
393 SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
395 struct smb2_negotiate_req *req;
396 struct smb2_negotiate_rsp *rsp;
400 struct TCP_Server_Info *server = ses->server;
401 int blob_offset, blob_length;
403 int flags = CIFS_NEG_OP;
405 cifs_dbg(FYI, "Negotiate protocol\n");
408 WARN(1, "%s: server is NULL!\n", __func__);
412 rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
416 req->hdr.SessionId = 0;
418 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
420 req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */
421 inc_rfc1001_len(req, 2);
423 /* only one of SMB2 signing flags may be set in SMB2 request */
425 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
426 else if (global_secflags & CIFSSEC_MAY_SIGN)
427 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
429 req->SecurityMode = 0;
431 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
433 /* ClientGUID must be zero for SMB2.02 dialect */
434 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
435 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
437 memcpy(req->ClientGUID, server->client_guid,
438 SMB2_CLIENT_GUID_SIZE);
439 if (ses->server->vals->protocol_id == SMB311_PROT_ID)
440 assemble_neg_contexts(req);
442 iov[0].iov_base = (char *)req;
443 /* 4 for rfc1002 length field */
444 iov[0].iov_len = get_rfc1002_length(req) + 4;
446 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags);
448 rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base;
450 * No tcon so can't do
451 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
456 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
458 /* BB we may eventually want to match the negotiated vs. requested
459 dialect, even though we are only requesting one at a time */
460 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
461 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
462 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
463 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
464 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
465 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
466 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
467 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
468 #ifdef CONFIG_CIFS_SMB311
469 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
470 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
473 cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
474 le16_to_cpu(rsp->DialectRevision));
478 server->dialect = le16_to_cpu(rsp->DialectRevision);
480 /* SMB2 only has an extended negflavor */
481 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
482 /* set it to the maximum buffer size value we can send with 1 credit */
483 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
484 SMB2_MAX_BUFFER_SIZE);
485 server->max_read = le32_to_cpu(rsp->MaxReadSize);
486 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
487 /* BB Do we need to validate the SecurityMode? */
488 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
489 server->capabilities = le32_to_cpu(rsp->Capabilities);
491 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
493 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
496 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
498 * ses->sectype = RawNTLMSSP;
499 * but for time being this is our only auth choice so doesn't matter.
500 * We just found a server which sets blob length to zero expecting raw.
502 if (blob_length == 0)
503 cifs_dbg(FYI, "missing security blob on negprot\n");
505 rc = cifs_enable_signing(server, ses->sign);
509 rc = decode_negTokenInit(security_blob, blob_length, server);
516 free_rsp_buf(resp_buftype, rsp);
520 int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
523 struct validate_negotiate_info_req vneg_inbuf;
524 struct validate_negotiate_info_rsp *pneg_rsp;
527 cifs_dbg(FYI, "validate negotiate\n");
530 * validation ioctl must be signed, so no point sending this if we
531 * can not sign it. We could eventually change this to selectively
532 * sign just this, the first and only signed request on a connection.
533 * This is good enough for now since a user who wants better security
534 * would also enable signing on the mount. Having validation of
535 * negotiate info for signed connections helps reduce attack vectors
537 if (tcon->ses->server->sign == false)
538 return 0; /* validation requires signing */
540 vneg_inbuf.Capabilities =
541 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
542 memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid,
543 SMB2_CLIENT_GUID_SIZE);
546 vneg_inbuf.SecurityMode =
547 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
548 else if (global_secflags & CIFSSEC_MAY_SIGN)
549 vneg_inbuf.SecurityMode =
550 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
552 vneg_inbuf.SecurityMode = 0;
554 vneg_inbuf.DialectCount = cpu_to_le16(1);
555 vneg_inbuf.Dialects[0] =
556 cpu_to_le16(tcon->ses->server->vals->protocol_id);
558 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
559 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
560 (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
561 (char **)&pneg_rsp, &rsplen);
564 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
568 if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
569 cifs_dbg(VFS, "invalid size of protocol negotiate response\n");
573 /* check validate negotiate info response matches what we got earlier */
574 if (pneg_rsp->Dialect !=
575 cpu_to_le16(tcon->ses->server->vals->protocol_id))
578 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
581 /* do not validate server guid because not saved at negprot time yet */
583 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
584 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
587 /* validate negotiate successful */
588 cifs_dbg(FYI, "validate negotiate info successful\n");
592 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
597 SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
598 const struct nls_table *nls_cp)
600 struct smb2_sess_setup_req *req;
601 struct smb2_sess_setup_rsp *rsp = NULL;
604 int resp_buftype = CIFS_NO_BUFFER;
605 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
606 struct TCP_Server_Info *server = ses->server;
608 struct key *spnego_key = NULL;
609 char *security_blob = NULL;
610 unsigned char *ntlmssp_blob = NULL;
611 bool use_spnego = false; /* else use raw ntlmssp */
612 u64 previous_session = ses->Suid;
614 cifs_dbg(FYI, "Session Setup\n");
617 WARN(1, "%s: server is NULL!\n", __func__);
622 * If we are here due to reconnect, free per-smb session key
623 * in case signing was required.
625 kfree(ses->auth_key.response);
626 ses->auth_key.response = NULL;
629 * If memory allocation is successful, caller of this function
632 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
635 ses->ntlmssp->sesskey_per_smbsess = true;
637 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
638 if (ses->sectype != Kerberos && ses->sectype != RawNTLMSSP)
639 ses->sectype = RawNTLMSSP;
641 ssetup_ntlmssp_authenticate:
642 if (phase == NtLmChallenge)
643 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
645 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
649 req->hdr.SessionId = 0; /* First session, not a reauthenticate */
651 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
652 req->PreviousSessionId = previous_session;
654 req->Flags = 0; /* MBZ */
655 /* to enable echos and oplocks */
656 req->hdr.CreditRequest = cpu_to_le16(3);
658 /* only one of SMB2 signing flags may be set in SMB2 request */
660 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
661 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
662 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
664 req->SecurityMode = 0;
666 req->Capabilities = 0;
667 req->Channel = 0; /* MBZ */
669 iov[0].iov_base = (char *)req;
670 /* 4 for rfc1002 length field and 1 for pad */
671 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
673 if (ses->sectype == Kerberos) {
674 #ifdef CONFIG_CIFS_UPCALL
675 struct cifs_spnego_msg *msg;
677 spnego_key = cifs_get_spnego_key(ses);
678 if (IS_ERR(spnego_key)) {
679 rc = PTR_ERR(spnego_key);
684 msg = spnego_key->payload.data[0];
686 * check version field to make sure that cifs.upcall is
687 * sending us a response in an expected form
689 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
691 "bad cifs.upcall version. Expected %d got %d",
692 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
696 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
698 if (!ses->auth_key.response) {
700 "Kerberos can't allocate (%u bytes) memory",
705 ses->auth_key.len = msg->sesskey_len;
706 blob_length = msg->secblob_len;
707 iov[1].iov_base = msg->data + msg->sesskey_len;
708 iov[1].iov_len = blob_length;
712 #endif /* CONFIG_CIFS_UPCALL */
713 } else if (phase == NtLmNegotiate) { /* if not krb5 must be ntlmssp */
714 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
716 if (ntlmssp_blob == NULL) {
720 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
722 /* blob_length = build_spnego_ntlmssp_blob(
724 sizeof(struct _NEGOTIATE_MESSAGE),
726 /* BB eventually need to add this */
727 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
732 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
733 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
734 security_blob = ntlmssp_blob;
736 iov[1].iov_base = security_blob;
737 iov[1].iov_len = blob_length;
738 } else if (phase == NtLmAuthenticate) {
739 req->hdr.SessionId = ses->Suid;
740 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
743 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n",
745 goto ssetup_exit; /* BB double check error handling */
748 /* blob_length = build_spnego_ntlmssp_blob(
752 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
757 security_blob = ntlmssp_blob;
759 iov[1].iov_base = security_blob;
760 iov[1].iov_len = blob_length;
762 cifs_dbg(VFS, "illegal ntlmssp phase\n");
767 /* Testing shows that buffer offset must be at location of Buffer[0] */
768 req->SecurityBufferOffset =
769 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
770 1 /* pad */ - 4 /* rfc1001 len */);
771 req->SecurityBufferLength = cpu_to_le16(blob_length);
773 inc_rfc1001_len(req, blob_length - 1 /* pad */);
775 /* BB add code to build os and lm fields */
777 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype,
778 CIFS_LOG_ERROR | CIFS_NEG_OP);
780 kfree(security_blob);
781 rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base;
782 ses->Suid = rsp->hdr.SessionId;
783 if (resp_buftype != CIFS_NO_BUFFER &&
784 rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) {
785 if (phase != NtLmNegotiate) {
786 cifs_dbg(VFS, "Unexpected more processing error\n");
789 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
790 le16_to_cpu(rsp->SecurityBufferOffset)) {
791 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
792 le16_to_cpu(rsp->SecurityBufferOffset));
797 /* NTLMSSP Negotiate sent now processing challenge (response) */
798 phase = NtLmChallenge; /* process ntlmssp challenge */
799 rc = 0; /* MORE_PROCESSING is not an error here but expected */
800 rc = decode_ntlmssp_challenge(rsp->Buffer,
801 le16_to_cpu(rsp->SecurityBufferLength), ses);
805 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
806 * but at least the raw NTLMSSP case works.
809 * No tcon so can't do
810 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
815 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
816 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
817 cifs_dbg(VFS, "SMB3 encryption not supported yet\n");
819 free_rsp_buf(resp_buftype, rsp);
821 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
822 if ((phase == NtLmChallenge) && (rc == 0))
823 goto ssetup_ntlmssp_authenticate;
826 mutex_lock(&server->srv_mutex);
827 if (server->sign && server->ops->generate_signingkey) {
828 rc = server->ops->generate_signingkey(ses);
829 kfree(ses->auth_key.response);
830 ses->auth_key.response = NULL;
833 "SMB3 session key generation failed\n");
834 mutex_unlock(&server->srv_mutex);
838 if (!server->session_estab) {
839 server->sequence_number = 0x2;
840 server->session_estab = true;
842 mutex_unlock(&server->srv_mutex);
844 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
845 spin_lock(&GlobalMid_Lock);
846 ses->status = CifsGood;
847 ses->need_reconnect = false;
848 spin_unlock(&GlobalMid_Lock);
853 kfree(ses->auth_key.response);
854 ses->auth_key.response = NULL;
857 key_invalidate(spnego_key);
866 SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
868 struct smb2_logoff_req *req; /* response is also trivial struct */
870 struct TCP_Server_Info *server;
872 cifs_dbg(FYI, "disconnect session %p\n", ses);
874 if (ses && (ses->server))
875 server = ses->server;
879 /* no need to send SMB logoff if uid already closed due to reconnect */
880 if (ses->need_reconnect)
881 goto smb2_session_already_dead;
883 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
887 /* since no tcon, smb2_init can not do this, so do here */
888 req->hdr.SessionId = ses->Suid;
890 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
892 rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0);
894 * No tcon so can't do
895 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
898 smb2_session_already_dead:
902 static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
904 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
907 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
909 /* These are similar values to what Windows uses */
910 static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
912 tcon->max_chunks = 256;
913 tcon->max_bytes_chunk = 1048576;
914 tcon->max_bytes_copy = 16777216;
918 SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
919 struct cifs_tcon *tcon, const struct nls_table *cp)
921 struct smb2_tree_connect_req *req;
922 struct smb2_tree_connect_rsp *rsp = NULL;
927 struct TCP_Server_Info *server;
928 __le16 *unc_path = NULL;
930 cifs_dbg(FYI, "TCON\n");
932 if ((ses->server) && tree)
933 server = ses->server;
937 if (tcon && tcon->bad_network_name)
940 if ((tcon && tcon->seal) &&
941 ((ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) == 0)) {
942 cifs_dbg(VFS, "encryption requested but no server support");
946 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
947 if (unc_path == NULL)
950 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
952 if (unc_path_len < 2) {
957 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
964 /* since no tcon, smb2_init can not do this, so do here */
965 req->hdr.SessionId = ses->Suid;
966 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
967 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
970 iov[0].iov_base = (char *)req;
971 /* 4 for rfc1002 length field and 1 for pad */
972 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
974 /* Testing shows that buffer offset must be at location of Buffer[0] */
975 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
976 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
977 req->PathLength = cpu_to_le16(unc_path_len - 2);
978 iov[1].iov_base = unc_path;
979 iov[1].iov_len = unc_path_len;
981 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
983 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
984 rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base;
988 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
989 tcon->need_reconnect = true;
991 goto tcon_error_exit;
995 ses->ipc_tid = rsp->hdr.TreeId;
999 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
1000 cifs_dbg(FYI, "connection to disk share\n");
1001 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
1003 cifs_dbg(FYI, "connection to pipe share\n");
1004 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
1006 cifs_dbg(FYI, "connection to printer\n");
1008 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
1010 goto tcon_error_exit;
1013 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
1014 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
1015 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1016 tcon->tidStatus = CifsGood;
1017 tcon->need_reconnect = false;
1018 tcon->tid = rsp->hdr.TreeId;
1019 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
1021 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1022 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
1023 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
1024 init_copy_chunk_defaults(tcon);
1025 if (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA)
1026 cifs_dbg(VFS, "Encrypted shares not supported");
1027 if (tcon->ses->server->ops->validate_negotiate)
1028 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
1030 free_rsp_buf(resp_buftype, rsp);
1035 if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) {
1036 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
1038 tcon->bad_network_name = true;
1044 SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1046 struct smb2_tree_disconnect_req *req; /* response is trivial */
1048 struct TCP_Server_Info *server;
1049 struct cifs_ses *ses = tcon->ses;
1051 cifs_dbg(FYI, "Tree Disconnect\n");
1053 if (ses && (ses->server))
1054 server = ses->server;
1058 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1061 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
1065 rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0);
1067 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1073 static struct create_durable *
1074 create_durable_buf(void)
1076 struct create_durable *buf;
1078 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1082 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1083 (struct create_durable, Data));
1084 buf->ccontext.DataLength = cpu_to_le32(16);
1085 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1086 (struct create_durable, Name));
1087 buf->ccontext.NameLength = cpu_to_le16(4);
1088 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1096 static struct create_durable *
1097 create_reconnect_durable_buf(struct cifs_fid *fid)
1099 struct create_durable *buf;
1101 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1105 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1106 (struct create_durable, Data));
1107 buf->ccontext.DataLength = cpu_to_le32(16);
1108 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1109 (struct create_durable, Name));
1110 buf->ccontext.NameLength = cpu_to_le16(4);
1111 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1112 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
1113 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1122 parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
1123 unsigned int *epoch)
1126 struct create_context *cc;
1128 unsigned int remaining;
1131 data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
1132 remaining = le32_to_cpu(rsp->CreateContextsLength);
1133 cc = (struct create_context *)data_offset;
1134 while (remaining >= sizeof(struct create_context)) {
1135 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
1136 if (le16_to_cpu(cc->NameLength) == 4 &&
1137 strncmp(name, "RqLs", 4) == 0)
1138 return server->ops->parse_lease_buf(cc, epoch);
1140 next = le32_to_cpu(cc->Next);
1144 cc = (struct create_context *)((char *)cc + next);
1151 add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1152 unsigned int *num_iovec, __u8 *oplock)
1154 struct smb2_create_req *req = iov[0].iov_base;
1155 unsigned int num = *num_iovec;
1157 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
1158 if (iov[num].iov_base == NULL)
1160 iov[num].iov_len = server->vals->create_lease_size;
1161 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1162 if (!req->CreateContextsOffset)
1163 req->CreateContextsOffset = cpu_to_le32(
1164 sizeof(struct smb2_create_req) - 4 +
1165 iov[num - 1].iov_len);
1166 le32_add_cpu(&req->CreateContextsLength,
1167 server->vals->create_lease_size);
1168 inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
1169 *num_iovec = num + 1;
1173 static struct create_durable_v2 *
1174 create_durable_v2_buf(struct cifs_fid *pfid)
1176 struct create_durable_v2 *buf;
1178 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
1182 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1183 (struct create_durable_v2, dcontext));
1184 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
1185 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1186 (struct create_durable_v2, Name));
1187 buf->ccontext.NameLength = cpu_to_le16(4);
1189 buf->dcontext.Timeout = 0; /* Should this be configurable by workload */
1190 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1191 generate_random_uuid(buf->dcontext.CreateGuid);
1192 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
1194 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1202 static struct create_durable_handle_reconnect_v2 *
1203 create_reconnect_durable_v2_buf(struct cifs_fid *fid)
1205 struct create_durable_handle_reconnect_v2 *buf;
1207 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
1212 buf->ccontext.DataOffset =
1213 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1215 buf->ccontext.DataLength =
1216 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
1217 buf->ccontext.NameOffset =
1218 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1220 buf->ccontext.NameLength = cpu_to_le16(4);
1222 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
1223 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
1224 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1225 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
1227 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1236 add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
1237 struct cifs_open_parms *oparms)
1239 struct smb2_create_req *req = iov[0].iov_base;
1240 unsigned int num = *num_iovec;
1242 iov[num].iov_base = create_durable_v2_buf(oparms->fid);
1243 if (iov[num].iov_base == NULL)
1245 iov[num].iov_len = sizeof(struct create_durable_v2);
1246 if (!req->CreateContextsOffset)
1247 req->CreateContextsOffset =
1248 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1250 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
1251 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable_v2));
1252 *num_iovec = num + 1;
1257 add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
1258 struct cifs_open_parms *oparms)
1260 struct smb2_create_req *req = iov[0].iov_base;
1261 unsigned int num = *num_iovec;
1263 /* indicate that we don't need to relock the file */
1264 oparms->reconnect = false;
1266 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
1267 if (iov[num].iov_base == NULL)
1269 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
1270 if (!req->CreateContextsOffset)
1271 req->CreateContextsOffset =
1272 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1274 le32_add_cpu(&req->CreateContextsLength,
1275 sizeof(struct create_durable_handle_reconnect_v2));
1276 inc_rfc1001_len(&req->hdr,
1277 sizeof(struct create_durable_handle_reconnect_v2));
1278 *num_iovec = num + 1;
1283 add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1284 struct cifs_open_parms *oparms, bool use_persistent)
1286 struct smb2_create_req *req = iov[0].iov_base;
1287 unsigned int num = *num_iovec;
1289 if (use_persistent) {
1290 if (oparms->reconnect)
1291 return add_durable_reconnect_v2_context(iov, num_iovec,
1294 return add_durable_v2_context(iov, num_iovec, oparms);
1297 if (oparms->reconnect) {
1298 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1299 /* indicate that we don't need to relock the file */
1300 oparms->reconnect = false;
1302 iov[num].iov_base = create_durable_buf();
1303 if (iov[num].iov_base == NULL)
1305 iov[num].iov_len = sizeof(struct create_durable);
1306 if (!req->CreateContextsOffset)
1307 req->CreateContextsOffset =
1308 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1310 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
1311 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
1312 *num_iovec = num + 1;
1317 SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
1318 __u8 *oplock, struct smb2_file_all_info *buf,
1319 struct smb2_err_rsp **err_buf)
1321 struct smb2_create_req *req;
1322 struct smb2_create_rsp *rsp;
1323 struct TCP_Server_Info *server;
1324 struct cifs_tcon *tcon = oparms->tcon;
1325 struct cifs_ses *ses = tcon->ses;
1329 __le16 *copy_path = NULL;
1332 unsigned int num_iovecs = 2;
1333 __u32 file_attributes = 0;
1334 char *dhc_buf = NULL, *lc_buf = NULL;
1336 cifs_dbg(FYI, "create/open\n");
1338 if (ses && (ses->server))
1339 server = ses->server;
1343 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
1347 if (oparms->create_options & CREATE_OPTION_READONLY)
1348 file_attributes |= ATTR_READONLY;
1349 if (oparms->create_options & CREATE_OPTION_SPECIAL)
1350 file_attributes |= ATTR_SYSTEM;
1352 req->ImpersonationLevel = IL_IMPERSONATION;
1353 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
1354 /* File attributes ignored on open (used in create though) */
1355 req->FileAttributes = cpu_to_le32(file_attributes);
1356 req->ShareAccess = FILE_SHARE_ALL_LE;
1357 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1358 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
1359 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
1360 /* do not count rfc1001 len field */
1361 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
1363 iov[0].iov_base = (char *)req;
1364 /* 4 for rfc1002 length field */
1365 iov[0].iov_len = get_rfc1002_length(req) + 4;
1367 /* MUST set path len (NameLength) to 0 opening root of share */
1368 req->NameLength = cpu_to_le16(uni_path_len - 2);
1369 /* -1 since last byte is buf[0] which is sent below (path) */
1371 if (uni_path_len % 8 != 0) {
1372 copy_size = uni_path_len / 8 * 8;
1373 if (copy_size < uni_path_len)
1376 copy_path = kzalloc(copy_size, GFP_KERNEL);
1379 memcpy((char *)copy_path, (const char *)path,
1381 uni_path_len = copy_size;
1385 iov[1].iov_len = uni_path_len;
1386 iov[1].iov_base = path;
1387 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1388 inc_rfc1001_len(req, uni_path_len - 1);
1390 if (!server->oplocks)
1391 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1393 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
1394 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1395 req->RequestedOplockLevel = *oplock;
1397 rc = add_lease_context(server, iov, &num_iovecs, oplock);
1399 cifs_small_buf_release(req);
1403 lc_buf = iov[num_iovecs-1].iov_base;
1406 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1407 /* need to set Next field of lease context if we request it */
1408 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
1409 struct create_context *ccontext =
1410 (struct create_context *)iov[num_iovecs-1].iov_base;
1412 cpu_to_le32(server->vals->create_lease_size);
1415 rc = add_durable_context(iov, &num_iovecs, oparms,
1416 tcon->use_persistent);
1418 cifs_small_buf_release(req);
1423 dhc_buf = iov[num_iovecs-1].iov_base;
1426 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1427 rsp = (struct smb2_create_rsp *)iov[0].iov_base;
1430 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
1432 *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
1437 oparms->fid->persistent_fid = rsp->PersistentFileId;
1438 oparms->fid->volatile_fid = rsp->VolatileFileId;
1441 memcpy(buf, &rsp->CreationTime, 32);
1442 buf->AllocationSize = rsp->AllocationSize;
1443 buf->EndOfFile = rsp->EndofFile;
1444 buf->Attributes = rsp->FileAttributes;
1445 buf->NumberOfLinks = cpu_to_le32(1);
1446 buf->DeletePending = 0;
1449 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
1450 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
1452 *oplock = rsp->OplockLevel;
1457 free_rsp_buf(resp_buftype, rsp);
1462 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1465 SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1466 u64 volatile_fid, u32 opcode, bool is_fsctl, char *in_data,
1467 u32 indatalen, char **out_data, u32 *plen /* returned data len */)
1469 struct smb2_ioctl_req *req;
1470 struct smb2_ioctl_rsp *rsp;
1471 struct TCP_Server_Info *server;
1472 struct cifs_ses *ses;
1478 cifs_dbg(FYI, "SMB2 IOCTL\n");
1480 if (out_data != NULL)
1483 /* zero out returned data len, in case of error */
1492 if (ses && (ses->server))
1493 server = ses->server;
1497 rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req);
1501 req->CtlCode = cpu_to_le32(opcode);
1502 req->PersistentFileId = persistent_fid;
1503 req->VolatileFileId = volatile_fid;
1506 req->InputCount = cpu_to_le32(indatalen);
1507 /* do not set InputOffset if no input data */
1509 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4);
1510 iov[1].iov_base = in_data;
1511 iov[1].iov_len = indatalen;
1516 req->OutputOffset = 0;
1517 req->OutputCount = 0; /* MBZ */
1520 * Could increase MaxOutputResponse, but that would require more
1521 * than one credit. Windows typically sets this smaller, but for some
1522 * ioctls it may be useful to allow server to send more. No point
1523 * limiting what the server can send as long as fits in one credit
1525 req->MaxOutputResponse = cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1528 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
1532 iov[0].iov_base = (char *)req;
1535 * If no input data, the size of ioctl struct in
1536 * protocol spec still includes a 1 byte data buffer,
1537 * but if input data passed to ioctl, we do not
1538 * want to double count this, so we do not send
1539 * the dummy one byte of data in iovec[0] if sending
1540 * input data (in iovec[1]). We also must add 4 bytes
1541 * in first iovec to allow for rfc1002 length field.
1545 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1546 inc_rfc1001_len(req, indatalen - 1);
1548 iov[0].iov_len = get_rfc1002_length(req) + 4;
1551 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1552 rsp = (struct smb2_ioctl_rsp *)iov[0].iov_base;
1554 if ((rc != 0) && (rc != -EINVAL)) {
1555 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1557 } else if (rc == -EINVAL) {
1558 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
1559 (opcode != FSCTL_SRV_COPYCHUNK)) {
1560 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1565 /* check if caller wants to look at return data or just return rc */
1566 if ((plen == NULL) || (out_data == NULL))
1569 *plen = le32_to_cpu(rsp->OutputCount);
1571 /* We check for obvious errors in the output buffer length and offset */
1573 goto ioctl_exit; /* server returned no data */
1574 else if (*plen > 0xFF00) {
1575 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
1581 if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
1582 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
1583 le32_to_cpu(rsp->OutputOffset));
1589 *out_data = kmalloc(*plen, GFP_KERNEL);
1590 if (*out_data == NULL) {
1596 (char *)&rsp->hdr.ProtocolId + le32_to_cpu(rsp->OutputOffset),
1599 free_rsp_buf(resp_buftype, rsp);
1604 * Individual callers to ioctl worker function follow
1608 SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1609 u64 persistent_fid, u64 volatile_fid)
1612 struct compress_ioctl fsctl_input;
1613 char *ret_data = NULL;
1615 fsctl_input.CompressionState =
1616 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
1618 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1619 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
1620 (char *)&fsctl_input /* data input */,
1621 2 /* in data len */, &ret_data /* out data */, NULL);
1623 cifs_dbg(FYI, "set compression rc %d\n", rc);
1629 SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1630 u64 persistent_fid, u64 volatile_fid)
1632 struct smb2_close_req *req;
1633 struct smb2_close_rsp *rsp;
1634 struct TCP_Server_Info *server;
1635 struct cifs_ses *ses = tcon->ses;
1640 cifs_dbg(FYI, "Close\n");
1642 if (ses && (ses->server))
1643 server = ses->server;
1647 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1651 req->PersistentFileId = persistent_fid;
1652 req->VolatileFileId = volatile_fid;
1654 iov[0].iov_base = (char *)req;
1655 /* 4 for rfc1002 length field */
1656 iov[0].iov_len = get_rfc1002_length(req) + 4;
1658 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1659 rsp = (struct smb2_close_rsp *)iov[0].iov_base;
1662 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
1666 /* BB FIXME - decode close response, update inode for caching */
1669 free_rsp_buf(resp_buftype, rsp);
1674 validate_buf(unsigned int offset, unsigned int buffer_length,
1675 struct smb2_hdr *hdr, unsigned int min_buf_size)
1678 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
1679 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
1680 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1681 char *end_of_buf = begin_of_buf + buffer_length;
1684 if (buffer_length < min_buf_size) {
1685 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
1686 buffer_length, min_buf_size);
1690 /* check if beyond RFC1001 maximum length */
1691 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
1692 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
1693 buffer_length, smb_len);
1697 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
1698 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
1706 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1707 * Caller must free buffer.
1710 validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
1711 struct smb2_hdr *hdr, unsigned int minbufsize,
1715 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1721 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
1725 memcpy(data, begin_of_buf, buffer_length);
1731 query_info(const unsigned int xid, struct cifs_tcon *tcon,
1732 u64 persistent_fid, u64 volatile_fid, u8 info_class,
1733 size_t output_len, size_t min_len, void *data)
1735 struct smb2_query_info_req *req;
1736 struct smb2_query_info_rsp *rsp = NULL;
1740 struct TCP_Server_Info *server;
1741 struct cifs_ses *ses = tcon->ses;
1743 cifs_dbg(FYI, "Query Info\n");
1745 if (ses && (ses->server))
1746 server = ses->server;
1750 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
1754 req->InfoType = SMB2_O_INFO_FILE;
1755 req->FileInfoClass = info_class;
1756 req->PersistentFileId = persistent_fid;
1757 req->VolatileFileId = volatile_fid;
1758 /* 4 for rfc1002 length field and 1 for Buffer */
1759 req->InputBufferOffset =
1760 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
1761 req->OutputBufferLength = cpu_to_le32(output_len);
1763 iov[0].iov_base = (char *)req;
1764 /* 4 for rfc1002 length field */
1765 iov[0].iov_len = get_rfc1002_length(req) + 4;
1767 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1768 rsp = (struct smb2_query_info_rsp *)iov[0].iov_base;
1771 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
1775 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
1776 le32_to_cpu(rsp->OutputBufferLength),
1777 &rsp->hdr, min_len, data);
1780 free_rsp_buf(resp_buftype, rsp);
1785 SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
1786 u64 persistent_fid, u64 volatile_fid,
1787 struct smb2_file_all_info *data)
1789 return query_info(xid, tcon, persistent_fid, volatile_fid,
1790 FILE_ALL_INFORMATION,
1791 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
1792 sizeof(struct smb2_file_all_info), data);
1796 SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
1797 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
1799 return query_info(xid, tcon, persistent_fid, volatile_fid,
1800 FILE_INTERNAL_INFORMATION,
1801 sizeof(struct smb2_file_internal_info),
1802 sizeof(struct smb2_file_internal_info), uniqueid);
1806 * This is a no-op for now. We're not really interested in the reply, but
1807 * rather in the fact that the server sent one and that server->lstrp
1810 * FIXME: maybe we should consider checking that the reply matches request?
1813 smb2_echo_callback(struct mid_q_entry *mid)
1815 struct TCP_Server_Info *server = mid->callback_data;
1816 struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf;
1817 unsigned int credits_received = 1;
1819 if (mid->mid_state == MID_RESPONSE_RECEIVED)
1820 credits_received = le16_to_cpu(smb2->hdr.CreditRequest);
1822 mutex_lock(&server->srv_mutex);
1823 DeleteMidQEntry(mid);
1824 mutex_unlock(&server->srv_mutex);
1825 add_credits(server, credits_received, CIFS_ECHO_OP);
1829 SMB2_echo(struct TCP_Server_Info *server)
1831 struct smb2_echo_req *req;
1834 struct smb_rqst rqst = { .rq_iov = &iov,
1837 cifs_dbg(FYI, "In echo request\n");
1839 if (server->tcpStatus == CifsNeedNegotiate) {
1840 struct list_head *tmp, *tmp2;
1841 struct cifs_ses *ses;
1842 struct cifs_tcon *tcon;
1844 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
1845 spin_lock(&cifs_tcp_ses_lock);
1846 list_for_each(tmp, &server->smb_ses_list) {
1847 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
1848 list_for_each(tmp2, &ses->tcon_list) {
1849 tcon = list_entry(tmp2, struct cifs_tcon,
1851 /* add check for persistent handle reconnect */
1852 if (tcon && tcon->need_reconnect) {
1853 spin_unlock(&cifs_tcp_ses_lock);
1854 rc = smb2_reconnect(SMB2_ECHO, tcon);
1855 spin_lock(&cifs_tcp_ses_lock);
1859 spin_unlock(&cifs_tcp_ses_lock);
1862 /* if no session, renegotiate failed above */
1863 if (server->tcpStatus == CifsNeedNegotiate)
1866 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
1870 req->hdr.CreditRequest = cpu_to_le16(1);
1872 iov.iov_base = (char *)req;
1873 /* 4 for rfc1002 length field */
1874 iov.iov_len = get_rfc1002_length(req) + 4;
1876 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server,
1879 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
1881 cifs_small_buf_release(req);
1886 SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1889 struct smb2_flush_req *req;
1890 struct TCP_Server_Info *server;
1891 struct cifs_ses *ses = tcon->ses;
1896 cifs_dbg(FYI, "Flush\n");
1898 if (ses && (ses->server))
1899 server = ses->server;
1903 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
1907 req->PersistentFileId = persistent_fid;
1908 req->VolatileFileId = volatile_fid;
1910 iov[0].iov_base = (char *)req;
1911 /* 4 for rfc1002 length field */
1912 iov[0].iov_len = get_rfc1002_length(req) + 4;
1914 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1917 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
1919 free_rsp_buf(resp_buftype, iov[0].iov_base);
1924 * To form a chain of read requests, any read requests after the first should
1925 * have the end_of_chain boolean set to true.
1928 smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms,
1929 unsigned int remaining_bytes, int request_type)
1932 struct smb2_read_req *req = NULL;
1934 rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req);
1937 if (io_parms->tcon->ses->server == NULL)
1938 return -ECONNABORTED;
1940 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1942 req->PersistentFileId = io_parms->persistent_fid;
1943 req->VolatileFileId = io_parms->volatile_fid;
1944 req->ReadChannelInfoOffset = 0; /* reserved */
1945 req->ReadChannelInfoLength = 0; /* reserved */
1946 req->Channel = 0; /* reserved */
1947 req->MinimumCount = 0;
1948 req->Length = cpu_to_le32(io_parms->length);
1949 req->Offset = cpu_to_le64(io_parms->offset);
1951 if (request_type & CHAINED_REQUEST) {
1952 if (!(request_type & END_OF_CHAIN)) {
1953 /* 4 for rfc1002 length field */
1954 req->hdr.NextCommand =
1955 cpu_to_le32(get_rfc1002_length(req) + 4);
1956 } else /* END_OF_CHAIN */
1957 req->hdr.NextCommand = 0;
1958 if (request_type & RELATED_REQUEST) {
1959 req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
1961 * Related requests use info from previous read request
1964 req->hdr.SessionId = 0xFFFFFFFF;
1965 req->hdr.TreeId = 0xFFFFFFFF;
1966 req->PersistentFileId = 0xFFFFFFFF;
1967 req->VolatileFileId = 0xFFFFFFFF;
1970 if (remaining_bytes > io_parms->length)
1971 req->RemainingBytes = cpu_to_le32(remaining_bytes);
1973 req->RemainingBytes = 0;
1975 iov[0].iov_base = (char *)req;
1976 /* 4 for rfc1002 length field */
1977 iov[0].iov_len = get_rfc1002_length(req) + 4;
1982 smb2_readv_callback(struct mid_q_entry *mid)
1984 struct cifs_readdata *rdata = mid->callback_data;
1985 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
1986 struct TCP_Server_Info *server = tcon->ses->server;
1987 struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base;
1988 unsigned int credits_received = 1;
1989 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
1991 .rq_pages = rdata->pages,
1992 .rq_npages = rdata->nr_pages,
1993 .rq_pagesz = rdata->pagesz,
1994 .rq_tailsz = rdata->tailsz };
1996 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1997 __func__, mid->mid, mid->mid_state, rdata->result,
2000 switch (mid->mid_state) {
2001 case MID_RESPONSE_RECEIVED:
2002 credits_received = le16_to_cpu(buf->CreditRequest);
2003 /* result already set, check signature */
2007 rc = smb2_verify_signature(&rqst, server);
2009 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
2012 /* FIXME: should this be counted toward the initiating task? */
2013 task_io_account_read(rdata->got_bytes);
2014 cifs_stats_bytes_read(tcon, rdata->got_bytes);
2016 case MID_REQUEST_SUBMITTED:
2017 case MID_RETRY_NEEDED:
2018 rdata->result = -EAGAIN;
2019 if (server->sign && rdata->got_bytes)
2020 /* reset bytes number since we can not check a sign */
2021 rdata->got_bytes = 0;
2022 /* FIXME: should this be counted toward the initiating task? */
2023 task_io_account_read(rdata->got_bytes);
2024 cifs_stats_bytes_read(tcon, rdata->got_bytes);
2027 if (rdata->result != -ENODATA)
2028 rdata->result = -EIO;
2032 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
2034 queue_work(cifsiod_wq, &rdata->work);
2035 mutex_lock(&server->srv_mutex);
2036 DeleteMidQEntry(mid);
2037 mutex_unlock(&server->srv_mutex);
2038 add_credits(server, credits_received, 0);
2041 /* smb2_async_readv - send an async write, and set up mid to handle result */
2043 smb2_async_readv(struct cifs_readdata *rdata)
2046 struct smb2_hdr *buf;
2047 struct cifs_io_parms io_parms;
2048 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
2050 struct TCP_Server_Info *server;
2052 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
2053 __func__, rdata->offset, rdata->bytes);
2055 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
2056 io_parms.offset = rdata->offset;
2057 io_parms.length = rdata->bytes;
2058 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
2059 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
2060 io_parms.pid = rdata->pid;
2062 server = io_parms.tcon->ses->server;
2064 rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0);
2066 if (rc == -EAGAIN && rdata->credits) {
2067 /* credits was reset by reconnect */
2069 /* reduce in_flight value since we won't send the req */
2070 spin_lock(&server->req_lock);
2071 server->in_flight--;
2072 spin_unlock(&server->req_lock);
2077 buf = (struct smb2_hdr *)rdata->iov.iov_base;
2078 /* 4 for rfc1002 length field */
2079 rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4;
2081 if (rdata->credits) {
2082 buf->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
2083 SMB2_MAX_BUFFER_SIZE));
2084 buf->CreditRequest = buf->CreditCharge;
2085 spin_lock(&server->req_lock);
2086 server->credits += rdata->credits -
2087 le16_to_cpu(buf->CreditCharge);
2088 spin_unlock(&server->req_lock);
2089 wake_up(&server->request_q);
2090 flags = CIFS_HAS_CREDITS;
2093 kref_get(&rdata->refcount);
2094 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
2095 cifs_readv_receive, smb2_readv_callback,
2098 kref_put(&rdata->refcount, cifs_readdata_release);
2099 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
2102 cifs_small_buf_release(buf);
2107 SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
2108 unsigned int *nbytes, char **buf, int *buf_type)
2110 int resp_buftype, rc = -EACCES;
2111 struct smb2_read_rsp *rsp = NULL;
2115 rc = smb2_new_read_req(iov, io_parms, 0, 0);
2119 rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1,
2120 &resp_buftype, CIFS_LOG_ERROR);
2122 rsp = (struct smb2_read_rsp *)iov[0].iov_base;
2124 if (rsp->hdr.Status == STATUS_END_OF_FILE) {
2125 free_rsp_buf(resp_buftype, iov[0].iov_base);
2130 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
2131 cifs_dbg(VFS, "Send error in read = %d\n", rc);
2133 *nbytes = le32_to_cpu(rsp->DataLength);
2134 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
2135 (*nbytes > io_parms->length)) {
2136 cifs_dbg(FYI, "bad length %d for count %d\n",
2137 *nbytes, io_parms->length);
2144 memcpy(*buf, (char *)&rsp->hdr.ProtocolId + rsp->DataOffset,
2146 free_rsp_buf(resp_buftype, iov[0].iov_base);
2147 } else if (resp_buftype != CIFS_NO_BUFFER) {
2148 *buf = iov[0].iov_base;
2149 if (resp_buftype == CIFS_SMALL_BUFFER)
2150 *buf_type = CIFS_SMALL_BUFFER;
2151 else if (resp_buftype == CIFS_LARGE_BUFFER)
2152 *buf_type = CIFS_LARGE_BUFFER;
2158 * Check the mid_state and signature on received buffer (if any), and queue the
2159 * workqueue completion task.
2162 smb2_writev_callback(struct mid_q_entry *mid)
2164 struct cifs_writedata *wdata = mid->callback_data;
2165 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
2166 struct TCP_Server_Info *server = tcon->ses->server;
2167 unsigned int written;
2168 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
2169 unsigned int credits_received = 1;
2171 switch (mid->mid_state) {
2172 case MID_RESPONSE_RECEIVED:
2173 credits_received = le16_to_cpu(rsp->hdr.CreditRequest);
2174 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
2175 if (wdata->result != 0)
2178 written = le32_to_cpu(rsp->DataLength);
2180 * Mask off high 16 bits when bytes written as returned
2181 * by the server is greater than bytes requested by the
2182 * client. OS/2 servers are known to set incorrect
2185 if (written > wdata->bytes)
2188 if (written < wdata->bytes)
2189 wdata->result = -ENOSPC;
2191 wdata->bytes = written;
2193 case MID_REQUEST_SUBMITTED:
2194 case MID_RETRY_NEEDED:
2195 wdata->result = -EAGAIN;
2198 wdata->result = -EIO;
2203 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2205 queue_work(cifsiod_wq, &wdata->work);
2206 mutex_lock(&server->srv_mutex);
2207 DeleteMidQEntry(mid);
2208 mutex_unlock(&server->srv_mutex);
2209 add_credits(tcon->ses->server, credits_received, 0);
2212 /* smb2_async_writev - send an async write, and set up mid to handle result */
2214 smb2_async_writev(struct cifs_writedata *wdata,
2215 void (*release)(struct kref *kref))
2217 int rc = -EACCES, flags = 0;
2218 struct smb2_write_req *req = NULL;
2219 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
2220 struct TCP_Server_Info *server = tcon->ses->server;
2222 struct smb_rqst rqst;
2224 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
2226 if (rc == -EAGAIN && wdata->credits) {
2227 /* credits was reset by reconnect */
2229 /* reduce in_flight value since we won't send the req */
2230 spin_lock(&server->req_lock);
2231 server->in_flight--;
2232 spin_unlock(&server->req_lock);
2234 goto async_writev_out;
2237 req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid);
2239 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
2240 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
2241 req->WriteChannelInfoOffset = 0;
2242 req->WriteChannelInfoLength = 0;
2244 req->Offset = cpu_to_le64(wdata->offset);
2245 /* 4 for rfc1002 length field */
2246 req->DataOffset = cpu_to_le16(
2247 offsetof(struct smb2_write_req, Buffer) - 4);
2248 req->RemainingBytes = 0;
2250 /* 4 for rfc1002 length field and 1 for Buffer */
2251 iov.iov_len = get_rfc1002_length(req) + 4 - 1;
2256 rqst.rq_pages = wdata->pages;
2257 rqst.rq_npages = wdata->nr_pages;
2258 rqst.rq_pagesz = wdata->pagesz;
2259 rqst.rq_tailsz = wdata->tailsz;
2261 cifs_dbg(FYI, "async write at %llu %u bytes\n",
2262 wdata->offset, wdata->bytes);
2264 req->Length = cpu_to_le32(wdata->bytes);
2266 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
2268 if (wdata->credits) {
2269 req->hdr.CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
2270 SMB2_MAX_BUFFER_SIZE));
2271 req->hdr.CreditRequest = req->hdr.CreditCharge;
2272 spin_lock(&server->req_lock);
2273 server->credits += wdata->credits -
2274 le16_to_cpu(req->hdr.CreditCharge);
2275 spin_unlock(&server->req_lock);
2276 wake_up(&server->request_q);
2277 flags = CIFS_HAS_CREDITS;
2280 kref_get(&wdata->refcount);
2281 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, wdata,
2285 kref_put(&wdata->refcount, release);
2286 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2290 cifs_small_buf_release(req);
2295 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2296 * The length field from io_parms must be at least 1 and indicates a number of
2297 * elements with data to write that begins with position 1 in iov array. All
2298 * data length is specified by count.
2301 SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
2302 unsigned int *nbytes, struct kvec *iov, int n_vec)
2305 struct smb2_write_req *req = NULL;
2306 struct smb2_write_rsp *rsp = NULL;
2313 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
2317 if (io_parms->tcon->ses->server == NULL)
2318 return -ECONNABORTED;
2320 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
2322 req->PersistentFileId = io_parms->persistent_fid;
2323 req->VolatileFileId = io_parms->volatile_fid;
2324 req->WriteChannelInfoOffset = 0;
2325 req->WriteChannelInfoLength = 0;
2327 req->Length = cpu_to_le32(io_parms->length);
2328 req->Offset = cpu_to_le64(io_parms->offset);
2329 /* 4 for rfc1002 length field */
2330 req->DataOffset = cpu_to_le16(
2331 offsetof(struct smb2_write_req, Buffer) - 4);
2332 req->RemainingBytes = 0;
2334 iov[0].iov_base = (char *)req;
2335 /* 4 for rfc1002 length field and 1 for Buffer */
2336 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2338 /* length of entire message including data to be written */
2339 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
2341 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
2343 rsp = (struct smb2_write_rsp *)iov[0].iov_base;
2346 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
2347 cifs_dbg(VFS, "Send error in write = %d\n", rc);
2349 *nbytes = le32_to_cpu(rsp->DataLength);
2351 free_rsp_buf(resp_buftype, rsp);
2356 num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
2359 unsigned int entrycount = 0;
2360 unsigned int next_offset = 0;
2361 FILE_DIRECTORY_INFO *entryptr;
2363 if (bufstart == NULL)
2366 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
2369 entryptr = (FILE_DIRECTORY_INFO *)
2370 ((char *)entryptr + next_offset);
2372 if ((char *)entryptr + size > end_of_buf) {
2373 cifs_dbg(VFS, "malformed search entry would overflow\n");
2377 len = le32_to_cpu(entryptr->FileNameLength);
2378 if ((char *)entryptr + len + size > end_of_buf) {
2379 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
2384 *lastentry = (char *)entryptr;
2387 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
2399 SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
2400 u64 persistent_fid, u64 volatile_fid, int index,
2401 struct cifs_search_info *srch_inf)
2403 struct smb2_query_directory_req *req;
2404 struct smb2_query_directory_rsp *rsp = NULL;
2408 int resp_buftype = CIFS_NO_BUFFER;
2409 unsigned char *bufptr;
2410 struct TCP_Server_Info *server;
2411 struct cifs_ses *ses = tcon->ses;
2412 __le16 asteriks = cpu_to_le16('*');
2414 unsigned int output_size = CIFSMaxBufSize;
2415 size_t info_buf_size;
2417 if (ses && (ses->server))
2418 server = ses->server;
2422 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
2426 switch (srch_inf->info_level) {
2427 case SMB_FIND_FILE_DIRECTORY_INFO:
2428 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
2429 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
2431 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
2432 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
2433 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
2436 cifs_dbg(VFS, "info level %u isn't supported\n",
2437 srch_inf->info_level);
2442 req->FileIndex = cpu_to_le32(index);
2443 req->PersistentFileId = persistent_fid;
2444 req->VolatileFileId = volatile_fid;
2447 bufptr = req->Buffer;
2448 memcpy(bufptr, &asteriks, len);
2450 req->FileNameOffset =
2451 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
2452 req->FileNameLength = cpu_to_le16(len);
2454 * BB could be 30 bytes or so longer if we used SMB2 specific
2455 * buffer lengths, but this is safe and close enough.
2457 output_size = min_t(unsigned int, output_size, server->maxBuf);
2458 output_size = min_t(unsigned int, output_size, 2 << 15);
2459 req->OutputBufferLength = cpu_to_le32(output_size);
2461 iov[0].iov_base = (char *)req;
2462 /* 4 for RFC1001 length and 1 for Buffer */
2463 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2465 iov[1].iov_base = (char *)(req->Buffer);
2466 iov[1].iov_len = len;
2468 inc_rfc1001_len(req, len - 1 /* Buffer */);
2470 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
2471 rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base;
2474 if (rc == -ENODATA && rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2475 srch_inf->endOfSearch = true;
2478 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
2482 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2483 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2488 srch_inf->unicode = true;
2490 if (srch_inf->ntwrk_buf_start) {
2491 if (srch_inf->smallBuf)
2492 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
2494 cifs_buf_release(srch_inf->ntwrk_buf_start);
2496 srch_inf->ntwrk_buf_start = (char *)rsp;
2497 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
2498 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
2499 /* 4 for rfc1002 length field */
2500 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
2501 srch_inf->entries_in_buffer =
2502 num_entries(srch_inf->srch_entries_start, end_of_smb,
2503 &srch_inf->last_entry, info_buf_size);
2504 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
2505 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
2506 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
2507 srch_inf->srch_entries_start, srch_inf->last_entry);
2508 if (resp_buftype == CIFS_LARGE_BUFFER)
2509 srch_inf->smallBuf = false;
2510 else if (resp_buftype == CIFS_SMALL_BUFFER)
2511 srch_inf->smallBuf = true;
2513 cifs_dbg(VFS, "illegal search buffer type\n");
2518 free_rsp_buf(resp_buftype, rsp);
2523 send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2524 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
2525 unsigned int num, void **data, unsigned int *size)
2527 struct smb2_set_info_req *req;
2528 struct smb2_set_info_rsp *rsp = NULL;
2533 struct TCP_Server_Info *server;
2534 struct cifs_ses *ses = tcon->ses;
2536 if (ses && (ses->server))
2537 server = ses->server;
2544 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
2548 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
2554 req->hdr.ProcessId = cpu_to_le32(pid);
2556 req->InfoType = SMB2_O_INFO_FILE;
2557 req->FileInfoClass = info_class;
2558 req->PersistentFileId = persistent_fid;
2559 req->VolatileFileId = volatile_fid;
2561 /* 4 for RFC1001 length and 1 for Buffer */
2563 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
2564 req->BufferLength = cpu_to_le32(*size);
2566 inc_rfc1001_len(req, *size - 1 /* Buffer */);
2568 memcpy(req->Buffer, *data, *size);
2570 iov[0].iov_base = (char *)req;
2571 /* 4 for RFC1001 length */
2572 iov[0].iov_len = get_rfc1002_length(req) + 4;
2574 for (i = 1; i < num; i++) {
2575 inc_rfc1001_len(req, size[i]);
2576 le32_add_cpu(&req->BufferLength, size[i]);
2577 iov[i].iov_base = (char *)data[i];
2578 iov[i].iov_len = size[i];
2581 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0);
2582 rsp = (struct smb2_set_info_rsp *)iov[0].iov_base;
2585 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
2587 free_rsp_buf(resp_buftype, rsp);
2593 SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
2594 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2596 struct smb2_file_rename_info info;
2598 unsigned int size[2];
2600 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2602 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2606 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
2607 /* 0 = fail if target already exists */
2608 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2609 info.FileNameLength = cpu_to_le32(len);
2612 size[0] = sizeof(struct smb2_file_rename_info);
2614 data[1] = target_file;
2615 size[1] = len + 2 /* null */;
2617 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
2618 current->tgid, FILE_RENAME_INFORMATION, 2, data,
2625 SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
2626 u64 persistent_fid, u64 volatile_fid)
2628 __u8 delete_pending = 1;
2632 data = &delete_pending;
2633 size = 1; /* sizeof __u8 */
2635 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2636 current->tgid, FILE_DISPOSITION_INFORMATION, 1, &data,
2641 SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
2642 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2644 struct smb2_file_link_info info;
2646 unsigned int size[2];
2648 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2650 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2654 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
2655 /* 0 = fail if link already exists */
2656 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2657 info.FileNameLength = cpu_to_le32(len);
2660 size[0] = sizeof(struct smb2_file_link_info);
2662 data[1] = target_file;
2663 size[1] = len + 2 /* null */;
2665 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
2666 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
2672 SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2673 u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc)
2675 struct smb2_file_eof_info info;
2679 info.EndOfFile = *eof;
2682 size = sizeof(struct smb2_file_eof_info);
2685 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2686 pid, FILE_ALLOCATION_INFORMATION, 1, &data, &size);
2688 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2689 pid, FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
2693 SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2694 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
2697 size = sizeof(FILE_BASIC_INFO);
2698 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2699 current->tgid, FILE_BASIC_INFORMATION, 1,
2700 (void **)&buf, &size);
2704 SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
2705 const u64 persistent_fid, const u64 volatile_fid,
2709 struct smb2_oplock_break *req = NULL;
2711 cifs_dbg(FYI, "SMB2_oplock_break\n");
2712 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2717 req->VolatileFid = volatile_fid;
2718 req->PersistentFid = persistent_fid;
2719 req->OplockLevel = oplock_level;
2720 req->hdr.CreditRequest = cpu_to_le16(1);
2722 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2723 /* SMB2 buffer freed by function above */
2726 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2727 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
2734 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
2735 struct kstatfs *kst)
2737 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
2738 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
2739 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
2740 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
2741 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
2746 build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
2747 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
2750 struct smb2_query_info_req *req;
2752 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
2754 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
2757 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2761 req->InfoType = SMB2_O_INFO_FILESYSTEM;
2762 req->FileInfoClass = level;
2763 req->PersistentFileId = persistent_fid;
2764 req->VolatileFileId = volatile_fid;
2765 /* 4 for rfc1002 length field and 1 for pad */
2766 req->InputBufferOffset =
2767 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
2768 req->OutputBufferLength = cpu_to_le32(
2769 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
2771 iov->iov_base = (char *)req;
2772 /* 4 for rfc1002 length field */
2773 iov->iov_len = get_rfc1002_length(req) + 4;
2778 SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
2779 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
2781 struct smb2_query_info_rsp *rsp = NULL;
2785 struct cifs_ses *ses = tcon->ses;
2786 struct smb2_fs_full_size_info *info = NULL;
2788 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
2789 sizeof(struct smb2_fs_full_size_info),
2790 persistent_fid, volatile_fid);
2794 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2796 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2799 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2801 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
2802 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
2803 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2804 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2805 sizeof(struct smb2_fs_full_size_info));
2807 copy_fs_info_to_kstatfs(info, fsdata);
2810 free_rsp_buf(resp_buftype, iov.iov_base);
2815 SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2816 u64 persistent_fid, u64 volatile_fid, int level)
2818 struct smb2_query_info_rsp *rsp = NULL;
2821 int resp_buftype, max_len, min_len;
2822 struct cifs_ses *ses = tcon->ses;
2823 unsigned int rsp_len, offset;
2825 if (level == FS_DEVICE_INFORMATION) {
2826 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2827 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2828 } else if (level == FS_ATTRIBUTE_INFORMATION) {
2829 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
2830 min_len = MIN_FS_ATTR_INFO_SIZE;
2831 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
2832 max_len = sizeof(struct smb3_fs_ss_info);
2833 min_len = sizeof(struct smb3_fs_ss_info);
2835 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2839 rc = build_qfs_info_req(&iov, tcon, level, max_len,
2840 persistent_fid, volatile_fid);
2844 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2846 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2849 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2851 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
2852 offset = le16_to_cpu(rsp->OutputBufferOffset);
2853 rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
2857 if (level == FS_ATTRIBUTE_INFORMATION)
2858 memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
2859 + (char *)&rsp->hdr, min_t(unsigned int,
2861 else if (level == FS_DEVICE_INFORMATION)
2862 memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
2863 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
2864 else if (level == FS_SECTOR_SIZE_INFORMATION) {
2865 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
2866 (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
2867 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
2868 tcon->perf_sector_size =
2869 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
2873 free_rsp_buf(resp_buftype, iov.iov_base);
2878 smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
2879 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2880 const __u32 num_lock, struct smb2_lock_element *buf)
2883 struct smb2_lock_req *req = NULL;
2888 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
2890 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
2894 req->hdr.ProcessId = cpu_to_le32(pid);
2895 req->LockCount = cpu_to_le16(num_lock);
2897 req->PersistentFileId = persist_fid;
2898 req->VolatileFileId = volatile_fid;
2900 count = num_lock * sizeof(struct smb2_lock_element);
2901 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
2903 iov[0].iov_base = (char *)req;
2904 /* 4 for rfc1002 length field and count for all locks */
2905 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
2906 iov[1].iov_base = (char *)buf;
2907 iov[1].iov_len = count;
2909 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
2910 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP);
2912 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
2913 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
2920 SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
2921 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2922 const __u64 length, const __u64 offset, const __u32 lock_flags,
2925 struct smb2_lock_element lock;
2927 lock.Offset = cpu_to_le64(offset);
2928 lock.Length = cpu_to_le64(length);
2929 lock.Flags = cpu_to_le32(lock_flags);
2930 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
2931 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
2933 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
2937 SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
2938 __u8 *lease_key, const __le32 lease_state)
2941 struct smb2_lease_ack *req = NULL;
2943 cifs_dbg(FYI, "SMB2_lease_break\n");
2944 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2949 req->hdr.CreditRequest = cpu_to_le16(1);
2950 req->StructureSize = cpu_to_le16(36);
2951 inc_rfc1001_len(req, 12);
2953 memcpy(req->LeaseKey, lease_key, 16);
2954 req->LeaseState = lease_state;
2956 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2957 /* SMB2 buffer freed by function above */
2960 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2961 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);