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"
51 * The following table defines the expected "StructureSize" of SMB2 requests
52 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
54 * Note that commands are defined in smb2pdu.h in le16 but the array below is
55 * indexed by command in host byte order.
57 static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
58 /* SMB2_NEGOTIATE */ 36,
59 /* SMB2_SESSION_SETUP */ 25,
61 /* SMB2_TREE_CONNECT */ 9,
62 /* SMB2_TREE_DISCONNECT */ 4,
72 /* SMB2_QUERY_DIRECTORY */ 33,
73 /* SMB2_CHANGE_NOTIFY */ 32,
74 /* SMB2_QUERY_INFO */ 41,
75 /* SMB2_SET_INFO */ 33,
76 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
81 smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd /* command */ ,
82 const struct cifs_tcon *tcon)
84 struct smb2_pdu *pdu = (struct smb2_pdu *)hdr;
85 char *temp = (char *)hdr;
86 /* lookup word count ie StructureSize from table */
87 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_cmd)];
90 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
91 * largest operations (Create)
95 /* Note this is only network field converted to big endian */
96 hdr->smb2_buf_length = cpu_to_be32(parmsize + sizeof(struct smb2_hdr)
97 - 4 /* RFC 1001 length field itself not counted */);
99 hdr->ProtocolId[0] = 0xFE;
100 hdr->ProtocolId[1] = 'S';
101 hdr->ProtocolId[2] = 'M';
102 hdr->ProtocolId[3] = 'B';
103 hdr->StructureSize = cpu_to_le16(64);
104 hdr->Command = smb2_cmd;
105 hdr->CreditRequest = cpu_to_le16(2); /* BB make this dynamic */
106 hdr->ProcessId = cpu_to_le32((__u16)current->tgid);
111 /* BB FIXME when we do write > 64K add +1 for every 64K in req or rsp */
112 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
113 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
115 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
116 hdr->CreditCharge = cpu_to_le16(1);
117 /* else CreditCharge MBZ */
119 hdr->TreeId = tcon->tid;
120 /* Uid is not converted */
122 hdr->SessionId = tcon->ses->Suid;
125 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
126 * to pass the path on the Open SMB prefixed by \\server\share.
127 * Not sure when we would need to do the augmented path (if ever) and
128 * setting this flag breaks the SMB2 open operation since it is
129 * illegal to send an empty path name (without \\server\share prefix)
130 * when the DFS flag is set in the SMB open header. We could
131 * consider setting the flag on all operations other than open
132 * but it is safer to net set it for now.
134 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
135 hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
137 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign)
138 hdr->Flags |= SMB2_FLAGS_SIGNED;
140 pdu->StructureSize2 = cpu_to_le16(parmsize);
145 smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
148 struct nls_table *nls_codepage;
149 struct cifs_ses *ses;
150 struct TCP_Server_Info *server;
153 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
154 * check for tcp and smb session status done differently
155 * for those three - in the calling routine.
160 if (smb2_command == SMB2_TREE_CONNECT)
163 if (tcon->tidStatus == CifsExiting) {
165 * only tree disconnect, open, and write,
166 * (and ulogoff which does not have tcon)
167 * are allowed as we start force umount.
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",
177 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
178 (!tcon->ses->server))
182 server = ses->server;
185 * Give demultiplex thread up to 10 seconds to reconnect, should be
186 * greater than cifs socket timeout which is 7 seconds
188 while (server->tcpStatus == CifsNeedReconnect) {
190 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
191 * here since they are implicitly done when session drops.
193 switch (smb2_command) {
195 * BB Should we keep oplock break and add flush to exceptions?
197 case SMB2_TREE_DISCONNECT:
200 case SMB2_OPLOCK_BREAK:
204 wait_event_interruptible_timeout(server->response_q,
205 (server->tcpStatus != CifsNeedReconnect), 10 * HZ);
207 /* are we still trying to reconnect? */
208 if (server->tcpStatus != CifsNeedReconnect)
212 * on "soft" mounts we wait once. Hard mounts keep
213 * retrying until process is killed or server comes
217 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
222 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
225 nls_codepage = load_nls_default();
228 * need to prevent multiple threads trying to simultaneously reconnect
229 * the same SMB session
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);
236 if (rc || !tcon->need_reconnect) {
237 mutex_unlock(&tcon->ses->session_mutex);
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);
247 atomic_inc(&tconInfoReconnectCount);
249 * BB FIXME add code to check if wsize needs update due to negotiated
250 * smb buffer size shrinking.
254 * Check if handle based operation so we know whether we can continue
255 * or not without returning to caller to reset file handle.
258 * BB Is flush done by server on drop of tcp session? Should we special
259 * case it and skip above?
261 switch (smb2_command) {
267 case SMB2_QUERY_DIRECTORY:
268 case SMB2_CHANGE_NOTIFY:
269 case SMB2_QUERY_INFO:
273 unload_nls(nls_codepage);
278 * Allocate and return pointer to an SMB request hdr, and set basic
279 * SMB information in the SMB header. If the return code is zero, this
280 * function must have filled in request_buf pointer.
283 small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
288 rc = smb2_reconnect(smb2_command, tcon);
292 /* BB eventually switch this to SMB2 specific small buf size */
293 *request_buf = cifs_small_buf_get();
294 if (*request_buf == NULL) {
295 /* BB should we add a retry in here if not a writepage? */
299 smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon);
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]);
306 cifs_stats_inc(&tcon->num_smbs_sent);
313 free_rsp_buf(int resp_buftype, void *rsp)
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);
324 * SMB2 Worker functions follow:
326 * The general structure of the worker functions is:
327 * 1) Call smb2_init (assembles SMB2 header)
328 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
329 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
330 * 4) Decode SMB2 command specific fields in the fixed length area
331 * 5) Decode variable length data area (if any for this SMB2 command type)
332 * 6) Call free smb buffer
338 SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
340 struct smb2_negotiate_req *req;
341 struct smb2_negotiate_rsp *rsp;
345 struct TCP_Server_Info *server = ses->server;
346 int blob_offset, blob_length;
348 int flags = CIFS_NEG_OP;
350 cifs_dbg(FYI, "Negotiate protocol\n");
353 WARN(1, "%s: server is NULL!\n", __func__);
357 rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
361 req->hdr.SessionId = 0;
363 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
365 req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */
366 inc_rfc1001_len(req, 2);
368 /* only one of SMB2 signing flags may be set in SMB2 request */
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);
374 req->SecurityMode = 0;
376 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
378 memcpy(req->ClientGUID, cifs_client_guid, SMB2_CLIENT_GUID_SIZE);
380 iov[0].iov_base = (char *)req;
381 /* 4 for rfc1002 length field */
382 iov[0].iov_len = get_rfc1002_length(req) + 4;
384 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags);
386 rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base;
388 * No tcon so can't do
389 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
394 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
396 /* BB we may eventually want to match the negotiated vs. requested
397 dialect, even though we are only requesting one at a time */
398 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
399 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
400 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
401 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
402 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
403 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
404 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
405 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
407 cifs_dbg(VFS, "Illegal dialect returned by server %d\n",
408 le16_to_cpu(rsp->DialectRevision));
412 server->dialect = le16_to_cpu(rsp->DialectRevision);
414 /* SMB2 only has an extended negflavor */
415 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
416 server->maxBuf = le32_to_cpu(rsp->MaxTransactSize);
417 server->max_read = le32_to_cpu(rsp->MaxReadSize);
418 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
419 /* BB Do we need to validate the SecurityMode? */
420 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
421 server->capabilities = le32_to_cpu(rsp->Capabilities);
423 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
425 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
428 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
430 * ses->sectype = RawNTLMSSP;
431 * but for time being this is our only auth choice so doesn't matter.
432 * We just found a server which sets blob length to zero expecting raw.
434 if (blob_length == 0)
435 cifs_dbg(FYI, "missing security blob on negprot\n");
437 rc = cifs_enable_signing(server, ses->sign);
438 #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
442 rc = decode_neg_token_init(security_blob, blob_length,
453 free_rsp_buf(resp_buftype, rsp);
458 SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
459 const struct nls_table *nls_cp)
461 struct smb2_sess_setup_req *req;
462 struct smb2_sess_setup_rsp *rsp = NULL;
466 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
467 struct TCP_Server_Info *server = ses->server;
470 char *ntlmssp_blob = NULL;
471 bool use_spnego = false; /* else use raw ntlmssp */
473 cifs_dbg(FYI, "Session Setup\n");
476 WARN(1, "%s: server is NULL!\n", __func__);
481 * If we are here due to reconnect, free per-smb session key
482 * in case signing was required.
484 kfree(ses->auth_key.response);
485 ses->auth_key.response = NULL;
488 * If memory allocation is successful, caller of this function
491 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
494 ses->ntlmssp->sesskey_per_smbsess = true;
496 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
497 ses->sectype = RawNTLMSSP;
499 ssetup_ntlmssp_authenticate:
500 if (phase == NtLmChallenge)
501 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
503 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
507 req->hdr.SessionId = 0; /* First session, not a reauthenticate */
508 req->VcNumber = 0; /* MBZ */
509 /* to enable echos and oplocks */
510 req->hdr.CreditRequest = cpu_to_le16(3);
512 /* only one of SMB2 signing flags may be set in SMB2 request */
514 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
515 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
516 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
518 req->SecurityMode = 0;
520 req->Capabilities = 0;
521 req->Channel = 0; /* MBZ */
523 iov[0].iov_base = (char *)req;
524 /* 4 for rfc1002 length field and 1 for pad */
525 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
526 if (phase == NtLmNegotiate) {
527 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
529 if (ntlmssp_blob == NULL) {
533 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
535 /* blob_length = build_spnego_ntlmssp_blob(
537 sizeof(struct _NEGOTIATE_MESSAGE),
539 /* BB eventually need to add this */
540 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
545 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
546 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
547 security_blob = ntlmssp_blob;
549 } else if (phase == NtLmAuthenticate) {
550 req->hdr.SessionId = ses->Suid;
551 ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500,
553 if (ntlmssp_blob == NULL) {
557 rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses,
560 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n",
562 goto ssetup_exit; /* BB double check error handling */
565 /* blob_length = build_spnego_ntlmssp_blob(
569 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
574 security_blob = ntlmssp_blob;
577 cifs_dbg(VFS, "illegal ntlmssp phase\n");
582 /* Testing shows that buffer offset must be at location of Buffer[0] */
583 req->SecurityBufferOffset =
584 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
585 1 /* pad */ - 4 /* rfc1001 len */);
586 req->SecurityBufferLength = cpu_to_le16(blob_length);
587 iov[1].iov_base = security_blob;
588 iov[1].iov_len = blob_length;
590 inc_rfc1001_len(req, blob_length - 1 /* pad */);
592 /* BB add code to build os and lm fields */
594 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype,
595 CIFS_LOG_ERROR | CIFS_NEG_OP);
597 kfree(security_blob);
598 rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base;
599 if (resp_buftype != CIFS_NO_BUFFER &&
600 rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) {
601 if (phase != NtLmNegotiate) {
602 cifs_dbg(VFS, "Unexpected more processing error\n");
605 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
606 le16_to_cpu(rsp->SecurityBufferOffset)) {
607 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
608 le16_to_cpu(rsp->SecurityBufferOffset));
613 /* NTLMSSP Negotiate sent now processing challenge (response) */
614 phase = NtLmChallenge; /* process ntlmssp challenge */
615 rc = 0; /* MORE_PROCESSING is not an error here but expected */
616 ses->Suid = rsp->hdr.SessionId;
617 rc = decode_ntlmssp_challenge(rsp->Buffer,
618 le16_to_cpu(rsp->SecurityBufferLength), ses);
622 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
623 * but at least the raw NTLMSSP case works.
626 * No tcon so can't do
627 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
632 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
634 free_rsp_buf(resp_buftype, rsp);
636 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
637 if ((phase == NtLmChallenge) && (rc == 0))
638 goto ssetup_ntlmssp_authenticate;
641 mutex_lock(&server->srv_mutex);
642 if (server->sign && server->ops->generate_signingkey) {
643 rc = server->ops->generate_signingkey(ses);
644 kfree(ses->auth_key.response);
645 ses->auth_key.response = NULL;
648 "SMB3 session key generation failed\n");
649 mutex_unlock(&server->srv_mutex);
653 if (!server->session_estab) {
654 server->sequence_number = 0x2;
655 server->session_estab = true;
657 mutex_unlock(&server->srv_mutex);
659 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
660 spin_lock(&GlobalMid_Lock);
661 ses->status = CifsGood;
662 ses->need_reconnect = false;
663 spin_unlock(&GlobalMid_Lock);
668 kfree(ses->auth_key.response);
669 ses->auth_key.response = NULL;
677 SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
679 struct smb2_logoff_req *req; /* response is also trivial struct */
681 struct TCP_Server_Info *server;
683 cifs_dbg(FYI, "disconnect session %p\n", ses);
685 if (ses && (ses->server))
686 server = ses->server;
690 /* no need to send SMB logoff if uid already closed due to reconnect */
691 if (ses->need_reconnect)
692 goto smb2_session_already_dead;
694 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
698 /* since no tcon, smb2_init can not do this, so do here */
699 req->hdr.SessionId = ses->Suid;
701 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
703 rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0);
705 * No tcon so can't do
706 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
709 smb2_session_already_dead:
713 static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
715 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
718 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
720 /* These are similar values to what Windows uses */
721 static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
723 tcon->max_chunks = 256;
724 tcon->max_bytes_chunk = 1048576;
725 tcon->max_bytes_copy = 16777216;
729 SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
730 struct cifs_tcon *tcon, const struct nls_table *cp)
732 struct smb2_tree_connect_req *req;
733 struct smb2_tree_connect_rsp *rsp = NULL;
738 struct TCP_Server_Info *server;
739 __le16 *unc_path = NULL;
741 cifs_dbg(FYI, "TCON\n");
743 if ((ses->server) && tree)
744 server = ses->server;
748 if (tcon && tcon->bad_network_name)
751 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
752 if (unc_path == NULL)
755 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
757 if (unc_path_len < 2) {
762 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
769 /* since no tcon, smb2_init can not do this, so do here */
770 req->hdr.SessionId = ses->Suid;
771 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
772 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
775 iov[0].iov_base = (char *)req;
776 /* 4 for rfc1002 length field and 1 for pad */
777 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
779 /* Testing shows that buffer offset must be at location of Buffer[0] */
780 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
781 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
782 req->PathLength = cpu_to_le16(unc_path_len - 2);
783 iov[1].iov_base = unc_path;
784 iov[1].iov_len = unc_path_len;
786 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
788 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
789 rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base;
793 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
794 tcon->need_reconnect = true;
796 goto tcon_error_exit;
800 ses->ipc_tid = rsp->hdr.TreeId;
804 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
805 cifs_dbg(FYI, "connection to disk share\n");
806 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
808 cifs_dbg(FYI, "connection to pipe share\n");
809 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
811 cifs_dbg(FYI, "connection to printer\n");
813 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
815 goto tcon_error_exit;
818 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
819 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
820 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
821 tcon->tidStatus = CifsGood;
822 tcon->need_reconnect = false;
823 tcon->tid = rsp->hdr.TreeId;
824 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
826 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
827 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
828 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
829 init_copy_chunk_defaults(tcon);
831 free_rsp_buf(resp_buftype, rsp);
836 if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) {
837 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
838 tcon->bad_network_name = true;
844 SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
846 struct smb2_tree_disconnect_req *req; /* response is trivial */
848 struct TCP_Server_Info *server;
849 struct cifs_ses *ses = tcon->ses;
851 cifs_dbg(FYI, "Tree Disconnect\n");
853 if (ses && (ses->server))
854 server = ses->server;
858 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
861 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
865 rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0);
867 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
873 static struct create_durable *
874 create_durable_buf(void)
876 struct create_durable *buf;
878 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
882 buf->ccontext.DataOffset = cpu_to_le16(offsetof
883 (struct create_durable, Data));
884 buf->ccontext.DataLength = cpu_to_le32(16);
885 buf->ccontext.NameOffset = cpu_to_le16(offsetof
886 (struct create_durable, Name));
887 buf->ccontext.NameLength = cpu_to_le16(4);
895 static struct create_durable *
896 create_reconnect_durable_buf(struct cifs_fid *fid)
898 struct create_durable *buf;
900 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
904 buf->ccontext.DataOffset = cpu_to_le16(offsetof
905 (struct create_durable, Data));
906 buf->ccontext.DataLength = cpu_to_le32(16);
907 buf->ccontext.NameOffset = cpu_to_le16(offsetof
908 (struct create_durable, Name));
909 buf->ccontext.NameLength = cpu_to_le16(4);
910 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
911 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
920 parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
924 struct create_context *cc;
925 unsigned int next = 0;
928 data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
929 cc = (struct create_context *)data_offset;
931 cc = (struct create_context *)((char *)cc + next);
932 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
933 if (le16_to_cpu(cc->NameLength) != 4 ||
934 strncmp(name, "RqLs", 4)) {
935 next = le32_to_cpu(cc->Next);
938 return server->ops->parse_lease_buf(cc, epoch);
945 add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
946 unsigned int *num_iovec, __u8 *oplock)
948 struct smb2_create_req *req = iov[0].iov_base;
949 unsigned int num = *num_iovec;
951 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
952 if (iov[num].iov_base == NULL)
954 iov[num].iov_len = server->vals->create_lease_size;
955 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
956 if (!req->CreateContextsOffset)
957 req->CreateContextsOffset = cpu_to_le32(
958 sizeof(struct smb2_create_req) - 4 +
959 iov[num - 1].iov_len);
960 le32_add_cpu(&req->CreateContextsLength,
961 server->vals->create_lease_size);
962 inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
963 *num_iovec = num + 1;
968 add_durable_context(struct kvec *iov, unsigned int *num_iovec,
969 struct cifs_open_parms *oparms)
971 struct smb2_create_req *req = iov[0].iov_base;
972 unsigned int num = *num_iovec;
974 if (oparms->reconnect) {
975 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
976 /* indicate that we don't need to relock the file */
977 oparms->reconnect = false;
979 iov[num].iov_base = create_durable_buf();
980 if (iov[num].iov_base == NULL)
982 iov[num].iov_len = sizeof(struct create_durable);
983 if (!req->CreateContextsOffset)
984 req->CreateContextsOffset =
985 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
987 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
988 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
989 *num_iovec = num + 1;
994 SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
995 __u8 *oplock, struct smb2_file_all_info *buf,
996 struct smb2_err_rsp **err_buf)
998 struct smb2_create_req *req;
999 struct smb2_create_rsp *rsp;
1000 struct TCP_Server_Info *server;
1001 struct cifs_tcon *tcon = oparms->tcon;
1002 struct cifs_ses *ses = tcon->ses;
1006 __le16 *copy_path = NULL;
1009 unsigned int num_iovecs = 2;
1010 __u32 file_attributes = 0;
1012 cifs_dbg(FYI, "create/open\n");
1014 if (ses && (ses->server))
1015 server = ses->server;
1019 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
1023 if (oparms->create_options & CREATE_OPTION_READONLY)
1024 file_attributes |= ATTR_READONLY;
1026 req->ImpersonationLevel = IL_IMPERSONATION;
1027 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
1028 /* File attributes ignored on open (used in create though) */
1029 req->FileAttributes = cpu_to_le32(file_attributes);
1030 req->ShareAccess = FILE_SHARE_ALL_LE;
1031 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1032 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
1033 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
1034 /* do not count rfc1001 len field */
1035 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
1037 iov[0].iov_base = (char *)req;
1038 /* 4 for rfc1002 length field */
1039 iov[0].iov_len = get_rfc1002_length(req) + 4;
1041 /* MUST set path len (NameLength) to 0 opening root of share */
1042 req->NameLength = cpu_to_le16(uni_path_len - 2);
1043 /* -1 since last byte is buf[0] which is sent below (path) */
1045 if (uni_path_len % 8 != 0) {
1046 copy_size = uni_path_len / 8 * 8;
1047 if (copy_size < uni_path_len)
1050 copy_path = kzalloc(copy_size, GFP_KERNEL);
1053 memcpy((char *)copy_path, (const char *)path,
1055 uni_path_len = copy_size;
1059 iov[1].iov_len = uni_path_len;
1060 iov[1].iov_base = path;
1061 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1062 inc_rfc1001_len(req, uni_path_len - 1);
1064 if (!server->oplocks)
1065 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1067 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
1068 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1069 req->RequestedOplockLevel = *oplock;
1071 rc = add_lease_context(server, iov, &num_iovecs, oplock);
1073 cifs_small_buf_release(req);
1079 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1080 /* need to set Next field of lease context if we request it */
1081 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
1082 struct create_context *ccontext =
1083 (struct create_context *)iov[num_iovecs-1].iov_base;
1085 cpu_to_le32(server->vals->create_lease_size);
1087 rc = add_durable_context(iov, &num_iovecs, oparms);
1089 cifs_small_buf_release(req);
1091 kfree(iov[num_iovecs-1].iov_base);
1096 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1097 rsp = (struct smb2_create_rsp *)iov[0].iov_base;
1100 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
1102 *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
1107 oparms->fid->persistent_fid = rsp->PersistentFileId;
1108 oparms->fid->volatile_fid = rsp->VolatileFileId;
1111 memcpy(buf, &rsp->CreationTime, 32);
1112 buf->AllocationSize = rsp->AllocationSize;
1113 buf->EndOfFile = rsp->EndofFile;
1114 buf->Attributes = rsp->FileAttributes;
1115 buf->NumberOfLinks = cpu_to_le32(1);
1116 buf->DeletePending = 0;
1119 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
1120 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
1122 *oplock = rsp->OplockLevel;
1125 free_rsp_buf(resp_buftype, rsp);
1130 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1133 SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1134 u64 volatile_fid, u32 opcode, bool is_fsctl, char *in_data,
1135 u32 indatalen, char **out_data, u32 *plen /* returned data len */)
1137 struct smb2_ioctl_req *req;
1138 struct smb2_ioctl_rsp *rsp;
1139 struct TCP_Server_Info *server;
1140 struct cifs_ses *ses = tcon->ses;
1146 cifs_dbg(FYI, "SMB2 IOCTL\n");
1149 /* zero out returned data len, in case of error */
1153 if (ses && (ses->server))
1154 server = ses->server;
1158 rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req);
1162 req->CtlCode = cpu_to_le32(opcode);
1163 req->PersistentFileId = persistent_fid;
1164 req->VolatileFileId = volatile_fid;
1167 req->InputCount = cpu_to_le32(indatalen);
1168 /* do not set InputOffset if no input data */
1170 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4);
1171 iov[1].iov_base = in_data;
1172 iov[1].iov_len = indatalen;
1177 req->OutputOffset = 0;
1178 req->OutputCount = 0; /* MBZ */
1181 * Could increase MaxOutputResponse, but that would require more
1182 * than one credit. Windows typically sets this smaller, but for some
1183 * ioctls it may be useful to allow server to send more. No point
1184 * limiting what the server can send as long as fits in one credit
1186 req->MaxOutputResponse = cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1189 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
1193 iov[0].iov_base = (char *)req;
1196 * If no input data, the size of ioctl struct in
1197 * protocol spec still includes a 1 byte data buffer,
1198 * but if input data passed to ioctl, we do not
1199 * want to double count this, so we do not send
1200 * the dummy one byte of data in iovec[0] if sending
1201 * input data (in iovec[1]). We also must add 4 bytes
1202 * in first iovec to allow for rfc1002 length field.
1206 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1207 inc_rfc1001_len(req, indatalen - 1);
1209 iov[0].iov_len = get_rfc1002_length(req) + 4;
1212 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1213 rsp = (struct smb2_ioctl_rsp *)iov[0].iov_base;
1217 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1221 /* check if caller wants to look at return data or just return rc */
1222 if ((plen == NULL) || (out_data == NULL))
1225 *plen = le32_to_cpu(rsp->OutputCount);
1227 /* We check for obvious errors in the output buffer length and offset */
1229 goto ioctl_exit; /* server returned no data */
1230 else if (*plen > 0xFF00) {
1231 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
1237 if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
1238 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
1239 le32_to_cpu(rsp->OutputOffset));
1245 *out_data = kmalloc(*plen, GFP_KERNEL);
1246 if (*out_data == NULL) {
1251 memcpy(*out_data, rsp->hdr.ProtocolId + le32_to_cpu(rsp->OutputOffset),
1254 free_rsp_buf(resp_buftype, rsp);
1259 * Individual callers to ioctl worker function follow
1263 SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1264 u64 persistent_fid, u64 volatile_fid)
1267 char *res_key = NULL;
1268 struct compress_ioctl fsctl_input;
1269 char *ret_data = NULL;
1271 fsctl_input.CompressionState =
1272 __constant_cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
1274 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1275 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
1276 (char *)&fsctl_input /* data input */,
1277 2 /* in data len */, &ret_data /* out data */, NULL);
1279 cifs_dbg(FYI, "set compression rc %d\n", rc);
1286 SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1287 u64 persistent_fid, u64 volatile_fid)
1289 struct smb2_close_req *req;
1290 struct smb2_close_rsp *rsp;
1291 struct TCP_Server_Info *server;
1292 struct cifs_ses *ses = tcon->ses;
1297 cifs_dbg(FYI, "Close\n");
1299 if (ses && (ses->server))
1300 server = ses->server;
1304 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1308 req->PersistentFileId = persistent_fid;
1309 req->VolatileFileId = volatile_fid;
1311 iov[0].iov_base = (char *)req;
1312 /* 4 for rfc1002 length field */
1313 iov[0].iov_len = get_rfc1002_length(req) + 4;
1315 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1316 rsp = (struct smb2_close_rsp *)iov[0].iov_base;
1320 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
1324 /* BB FIXME - decode close response, update inode for caching */
1327 free_rsp_buf(resp_buftype, rsp);
1332 validate_buf(unsigned int offset, unsigned int buffer_length,
1333 struct smb2_hdr *hdr, unsigned int min_buf_size)
1336 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
1337 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
1338 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1339 char *end_of_buf = begin_of_buf + buffer_length;
1342 if (buffer_length < min_buf_size) {
1343 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
1344 buffer_length, min_buf_size);
1348 /* check if beyond RFC1001 maximum length */
1349 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
1350 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
1351 buffer_length, smb_len);
1355 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
1356 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
1364 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1365 * Caller must free buffer.
1368 validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
1369 struct smb2_hdr *hdr, unsigned int minbufsize,
1373 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1379 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
1383 memcpy(data, begin_of_buf, buffer_length);
1389 query_info(const unsigned int xid, struct cifs_tcon *tcon,
1390 u64 persistent_fid, u64 volatile_fid, u8 info_class,
1391 size_t output_len, size_t min_len, void *data)
1393 struct smb2_query_info_req *req;
1394 struct smb2_query_info_rsp *rsp = NULL;
1398 struct TCP_Server_Info *server;
1399 struct cifs_ses *ses = tcon->ses;
1401 cifs_dbg(FYI, "Query Info\n");
1403 if (ses && (ses->server))
1404 server = ses->server;
1408 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
1412 req->InfoType = SMB2_O_INFO_FILE;
1413 req->FileInfoClass = info_class;
1414 req->PersistentFileId = persistent_fid;
1415 req->VolatileFileId = volatile_fid;
1416 /* 4 for rfc1002 length field and 1 for Buffer */
1417 req->InputBufferOffset =
1418 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
1419 req->OutputBufferLength = cpu_to_le32(output_len);
1421 iov[0].iov_base = (char *)req;
1422 /* 4 for rfc1002 length field */
1423 iov[0].iov_len = get_rfc1002_length(req) + 4;
1425 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1426 rsp = (struct smb2_query_info_rsp *)iov[0].iov_base;
1429 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
1433 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
1434 le32_to_cpu(rsp->OutputBufferLength),
1435 &rsp->hdr, min_len, data);
1438 free_rsp_buf(resp_buftype, rsp);
1443 SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
1444 u64 persistent_fid, u64 volatile_fid,
1445 struct smb2_file_all_info *data)
1447 return query_info(xid, tcon, persistent_fid, volatile_fid,
1448 FILE_ALL_INFORMATION,
1449 sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
1450 sizeof(struct smb2_file_all_info), data);
1454 SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
1455 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
1457 return query_info(xid, tcon, persistent_fid, volatile_fid,
1458 FILE_INTERNAL_INFORMATION,
1459 sizeof(struct smb2_file_internal_info),
1460 sizeof(struct smb2_file_internal_info), uniqueid);
1464 * This is a no-op for now. We're not really interested in the reply, but
1465 * rather in the fact that the server sent one and that server->lstrp
1468 * FIXME: maybe we should consider checking that the reply matches request?
1471 smb2_echo_callback(struct mid_q_entry *mid)
1473 struct TCP_Server_Info *server = mid->callback_data;
1474 struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf;
1475 unsigned int credits_received = 1;
1477 if (mid->mid_state == MID_RESPONSE_RECEIVED)
1478 credits_received = le16_to_cpu(smb2->hdr.CreditRequest);
1480 DeleteMidQEntry(mid);
1481 add_credits(server, credits_received, CIFS_ECHO_OP);
1485 SMB2_echo(struct TCP_Server_Info *server)
1487 struct smb2_echo_req *req;
1490 struct smb_rqst rqst = { .rq_iov = &iov,
1493 cifs_dbg(FYI, "In echo request\n");
1495 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
1499 req->hdr.CreditRequest = cpu_to_le16(1);
1501 iov.iov_base = (char *)req;
1502 /* 4 for rfc1002 length field */
1503 iov.iov_len = get_rfc1002_length(req) + 4;
1505 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server,
1508 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
1510 cifs_small_buf_release(req);
1515 SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1518 struct smb2_flush_req *req;
1519 struct TCP_Server_Info *server;
1520 struct cifs_ses *ses = tcon->ses;
1525 cifs_dbg(FYI, "Flush\n");
1527 if (ses && (ses->server))
1528 server = ses->server;
1532 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
1536 req->PersistentFileId = persistent_fid;
1537 req->VolatileFileId = volatile_fid;
1539 iov[0].iov_base = (char *)req;
1540 /* 4 for rfc1002 length field */
1541 iov[0].iov_len = get_rfc1002_length(req) + 4;
1543 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1545 if ((rc != 0) && tcon)
1546 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
1548 free_rsp_buf(resp_buftype, iov[0].iov_base);
1553 * To form a chain of read requests, any read requests after the first should
1554 * have the end_of_chain boolean set to true.
1557 smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms,
1558 unsigned int remaining_bytes, int request_type)
1561 struct smb2_read_req *req = NULL;
1563 rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req);
1566 if (io_parms->tcon->ses->server == NULL)
1567 return -ECONNABORTED;
1569 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1571 req->PersistentFileId = io_parms->persistent_fid;
1572 req->VolatileFileId = io_parms->volatile_fid;
1573 req->ReadChannelInfoOffset = 0; /* reserved */
1574 req->ReadChannelInfoLength = 0; /* reserved */
1575 req->Channel = 0; /* reserved */
1576 req->MinimumCount = 0;
1577 req->Length = cpu_to_le32(io_parms->length);
1578 req->Offset = cpu_to_le64(io_parms->offset);
1580 if (request_type & CHAINED_REQUEST) {
1581 if (!(request_type & END_OF_CHAIN)) {
1582 /* 4 for rfc1002 length field */
1583 req->hdr.NextCommand =
1584 cpu_to_le32(get_rfc1002_length(req) + 4);
1585 } else /* END_OF_CHAIN */
1586 req->hdr.NextCommand = 0;
1587 if (request_type & RELATED_REQUEST) {
1588 req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
1590 * Related requests use info from previous read request
1593 req->hdr.SessionId = 0xFFFFFFFF;
1594 req->hdr.TreeId = 0xFFFFFFFF;
1595 req->PersistentFileId = 0xFFFFFFFF;
1596 req->VolatileFileId = 0xFFFFFFFF;
1599 if (remaining_bytes > io_parms->length)
1600 req->RemainingBytes = cpu_to_le32(remaining_bytes);
1602 req->RemainingBytes = 0;
1604 iov[0].iov_base = (char *)req;
1605 /* 4 for rfc1002 length field */
1606 iov[0].iov_len = get_rfc1002_length(req) + 4;
1611 smb2_readv_callback(struct mid_q_entry *mid)
1613 struct cifs_readdata *rdata = mid->callback_data;
1614 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
1615 struct TCP_Server_Info *server = tcon->ses->server;
1616 struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base;
1617 unsigned int credits_received = 1;
1618 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
1620 .rq_pages = rdata->pages,
1621 .rq_npages = rdata->nr_pages,
1622 .rq_pagesz = rdata->pagesz,
1623 .rq_tailsz = rdata->tailsz };
1625 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1626 __func__, mid->mid, mid->mid_state, rdata->result,
1629 switch (mid->mid_state) {
1630 case MID_RESPONSE_RECEIVED:
1631 credits_received = le16_to_cpu(buf->CreditRequest);
1632 /* result already set, check signature */
1636 rc = smb2_verify_signature(&rqst, server);
1638 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
1641 /* FIXME: should this be counted toward the initiating task? */
1642 task_io_account_read(rdata->bytes);
1643 cifs_stats_bytes_read(tcon, rdata->bytes);
1645 case MID_REQUEST_SUBMITTED:
1646 case MID_RETRY_NEEDED:
1647 rdata->result = -EAGAIN;
1650 if (rdata->result != -ENODATA)
1651 rdata->result = -EIO;
1655 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
1657 queue_work(cifsiod_wq, &rdata->work);
1658 DeleteMidQEntry(mid);
1659 add_credits(server, credits_received, 0);
1662 /* smb2_async_readv - send an async write, and set up mid to handle result */
1664 smb2_async_readv(struct cifs_readdata *rdata)
1667 struct smb2_hdr *buf;
1668 struct cifs_io_parms io_parms;
1669 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
1672 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
1673 __func__, rdata->offset, rdata->bytes);
1675 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
1676 io_parms.offset = rdata->offset;
1677 io_parms.length = rdata->bytes;
1678 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
1679 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
1680 io_parms.pid = rdata->pid;
1681 rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0);
1685 buf = (struct smb2_hdr *)rdata->iov.iov_base;
1686 /* 4 for rfc1002 length field */
1687 rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4;
1689 kref_get(&rdata->refcount);
1690 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
1691 cifs_readv_receive, smb2_readv_callback,
1694 kref_put(&rdata->refcount, cifs_readdata_release);
1695 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
1698 cifs_small_buf_release(buf);
1703 SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
1704 unsigned int *nbytes, char **buf, int *buf_type)
1706 int resp_buftype, rc = -EACCES;
1707 struct smb2_read_rsp *rsp = NULL;
1711 rc = smb2_new_read_req(iov, io_parms, 0, 0);
1715 rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1,
1716 &resp_buftype, CIFS_LOG_ERROR);
1718 rsp = (struct smb2_read_rsp *)iov[0].iov_base;
1720 if (rsp->hdr.Status == STATUS_END_OF_FILE) {
1721 free_rsp_buf(resp_buftype, iov[0].iov_base);
1726 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
1727 cifs_dbg(VFS, "Send error in read = %d\n", rc);
1729 *nbytes = le32_to_cpu(rsp->DataLength);
1730 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
1731 (*nbytes > io_parms->length)) {
1732 cifs_dbg(FYI, "bad length %d for count %d\n",
1733 *nbytes, io_parms->length);
1740 memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset,
1742 free_rsp_buf(resp_buftype, iov[0].iov_base);
1743 } else if (resp_buftype != CIFS_NO_BUFFER) {
1744 *buf = iov[0].iov_base;
1745 if (resp_buftype == CIFS_SMALL_BUFFER)
1746 *buf_type = CIFS_SMALL_BUFFER;
1747 else if (resp_buftype == CIFS_LARGE_BUFFER)
1748 *buf_type = CIFS_LARGE_BUFFER;
1754 * Check the mid_state and signature on received buffer (if any), and queue the
1755 * workqueue completion task.
1758 smb2_writev_callback(struct mid_q_entry *mid)
1760 struct cifs_writedata *wdata = mid->callback_data;
1761 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1762 unsigned int written;
1763 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
1764 unsigned int credits_received = 1;
1766 switch (mid->mid_state) {
1767 case MID_RESPONSE_RECEIVED:
1768 credits_received = le16_to_cpu(rsp->hdr.CreditRequest);
1769 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
1770 if (wdata->result != 0)
1773 written = le32_to_cpu(rsp->DataLength);
1775 * Mask off high 16 bits when bytes written as returned
1776 * by the server is greater than bytes requested by the
1777 * client. OS/2 servers are known to set incorrect
1780 if (written > wdata->bytes)
1783 if (written < wdata->bytes)
1784 wdata->result = -ENOSPC;
1786 wdata->bytes = written;
1788 case MID_REQUEST_SUBMITTED:
1789 case MID_RETRY_NEEDED:
1790 wdata->result = -EAGAIN;
1793 wdata->result = -EIO;
1798 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1800 queue_work(cifsiod_wq, &wdata->work);
1801 DeleteMidQEntry(mid);
1802 add_credits(tcon->ses->server, credits_received, 0);
1805 /* smb2_async_writev - send an async write, and set up mid to handle result */
1807 smb2_async_writev(struct cifs_writedata *wdata)
1810 struct smb2_write_req *req = NULL;
1811 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1813 struct smb_rqst rqst;
1815 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
1817 goto async_writev_out;
1819 req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid);
1821 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
1822 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
1823 req->WriteChannelInfoOffset = 0;
1824 req->WriteChannelInfoLength = 0;
1826 req->Offset = cpu_to_le64(wdata->offset);
1827 /* 4 for rfc1002 length field */
1828 req->DataOffset = cpu_to_le16(
1829 offsetof(struct smb2_write_req, Buffer) - 4);
1830 req->RemainingBytes = 0;
1832 /* 4 for rfc1002 length field and 1 for Buffer */
1833 iov.iov_len = get_rfc1002_length(req) + 4 - 1;
1838 rqst.rq_pages = wdata->pages;
1839 rqst.rq_npages = wdata->nr_pages;
1840 rqst.rq_pagesz = wdata->pagesz;
1841 rqst.rq_tailsz = wdata->tailsz;
1843 cifs_dbg(FYI, "async write at %llu %u bytes\n",
1844 wdata->offset, wdata->bytes);
1846 req->Length = cpu_to_le32(wdata->bytes);
1848 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
1850 kref_get(&wdata->refcount);
1851 rc = cifs_call_async(tcon->ses->server, &rqst, NULL,
1852 smb2_writev_callback, wdata, 0);
1855 kref_put(&wdata->refcount, cifs_writedata_release);
1856 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1860 cifs_small_buf_release(req);
1865 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1866 * The length field from io_parms must be at least 1 and indicates a number of
1867 * elements with data to write that begins with position 1 in iov array. All
1868 * data length is specified by count.
1871 SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
1872 unsigned int *nbytes, struct kvec *iov, int n_vec)
1875 struct smb2_write_req *req = NULL;
1876 struct smb2_write_rsp *rsp = NULL;
1883 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
1887 if (io_parms->tcon->ses->server == NULL)
1888 return -ECONNABORTED;
1890 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1892 req->PersistentFileId = io_parms->persistent_fid;
1893 req->VolatileFileId = io_parms->volatile_fid;
1894 req->WriteChannelInfoOffset = 0;
1895 req->WriteChannelInfoLength = 0;
1897 req->Length = cpu_to_le32(io_parms->length);
1898 req->Offset = cpu_to_le64(io_parms->offset);
1899 /* 4 for rfc1002 length field */
1900 req->DataOffset = cpu_to_le16(
1901 offsetof(struct smb2_write_req, Buffer) - 4);
1902 req->RemainingBytes = 0;
1904 iov[0].iov_base = (char *)req;
1905 /* 4 for rfc1002 length field and 1 for Buffer */
1906 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1908 /* length of entire message including data to be written */
1909 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
1911 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
1913 rsp = (struct smb2_write_rsp *)iov[0].iov_base;
1916 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
1917 cifs_dbg(VFS, "Send error in write = %d\n", rc);
1919 *nbytes = le32_to_cpu(rsp->DataLength);
1921 free_rsp_buf(resp_buftype, rsp);
1926 num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
1929 unsigned int entrycount = 0;
1930 unsigned int next_offset = 0;
1931 FILE_DIRECTORY_INFO *entryptr;
1933 if (bufstart == NULL)
1936 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
1939 entryptr = (FILE_DIRECTORY_INFO *)
1940 ((char *)entryptr + next_offset);
1942 if ((char *)entryptr + size > end_of_buf) {
1943 cifs_dbg(VFS, "malformed search entry would overflow\n");
1947 len = le32_to_cpu(entryptr->FileNameLength);
1948 if ((char *)entryptr + len + size > end_of_buf) {
1949 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
1954 *lastentry = (char *)entryptr;
1957 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
1969 SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
1970 u64 persistent_fid, u64 volatile_fid, int index,
1971 struct cifs_search_info *srch_inf)
1973 struct smb2_query_directory_req *req;
1974 struct smb2_query_directory_rsp *rsp = NULL;
1979 unsigned char *bufptr;
1980 struct TCP_Server_Info *server;
1981 struct cifs_ses *ses = tcon->ses;
1982 __le16 asteriks = cpu_to_le16('*');
1984 unsigned int output_size = CIFSMaxBufSize;
1985 size_t info_buf_size;
1987 if (ses && (ses->server))
1988 server = ses->server;
1992 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
1996 switch (srch_inf->info_level) {
1997 case SMB_FIND_FILE_DIRECTORY_INFO:
1998 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
1999 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
2001 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
2002 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
2003 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
2006 cifs_dbg(VFS, "info level %u isn't supported\n",
2007 srch_inf->info_level);
2012 req->FileIndex = cpu_to_le32(index);
2013 req->PersistentFileId = persistent_fid;
2014 req->VolatileFileId = volatile_fid;
2017 bufptr = req->Buffer;
2018 memcpy(bufptr, &asteriks, len);
2020 req->FileNameOffset =
2021 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
2022 req->FileNameLength = cpu_to_le16(len);
2024 * BB could be 30 bytes or so longer if we used SMB2 specific
2025 * buffer lengths, but this is safe and close enough.
2027 output_size = min_t(unsigned int, output_size, server->maxBuf);
2028 output_size = min_t(unsigned int, output_size, 2 << 15);
2029 req->OutputBufferLength = cpu_to_le32(output_size);
2031 iov[0].iov_base = (char *)req;
2032 /* 4 for RFC1001 length and 1 for Buffer */
2033 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2035 iov[1].iov_base = (char *)(req->Buffer);
2036 iov[1].iov_len = len;
2038 inc_rfc1001_len(req, len - 1 /* Buffer */);
2040 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
2041 rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base;
2044 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
2048 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2049 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2054 srch_inf->unicode = true;
2056 if (srch_inf->ntwrk_buf_start) {
2057 if (srch_inf->smallBuf)
2058 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
2060 cifs_buf_release(srch_inf->ntwrk_buf_start);
2062 srch_inf->ntwrk_buf_start = (char *)rsp;
2063 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
2064 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
2065 /* 4 for rfc1002 length field */
2066 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
2067 srch_inf->entries_in_buffer =
2068 num_entries(srch_inf->srch_entries_start, end_of_smb,
2069 &srch_inf->last_entry, info_buf_size);
2070 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
2071 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
2072 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
2073 srch_inf->srch_entries_start, srch_inf->last_entry);
2074 if (resp_buftype == CIFS_LARGE_BUFFER)
2075 srch_inf->smallBuf = false;
2076 else if (resp_buftype == CIFS_SMALL_BUFFER)
2077 srch_inf->smallBuf = true;
2079 cifs_dbg(VFS, "illegal search buffer type\n");
2081 if (rsp->hdr.Status == STATUS_NO_MORE_FILES)
2082 srch_inf->endOfSearch = 1;
2084 srch_inf->endOfSearch = 0;
2089 free_rsp_buf(resp_buftype, rsp);
2094 send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2095 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
2096 unsigned int num, void **data, unsigned int *size)
2098 struct smb2_set_info_req *req;
2099 struct smb2_set_info_rsp *rsp = NULL;
2104 struct TCP_Server_Info *server;
2105 struct cifs_ses *ses = tcon->ses;
2107 if (ses && (ses->server))
2108 server = ses->server;
2115 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
2119 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
2125 req->hdr.ProcessId = cpu_to_le32(pid);
2127 req->InfoType = SMB2_O_INFO_FILE;
2128 req->FileInfoClass = info_class;
2129 req->PersistentFileId = persistent_fid;
2130 req->VolatileFileId = volatile_fid;
2132 /* 4 for RFC1001 length and 1 for Buffer */
2134 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
2135 req->BufferLength = cpu_to_le32(*size);
2137 inc_rfc1001_len(req, *size - 1 /* Buffer */);
2139 memcpy(req->Buffer, *data, *size);
2141 iov[0].iov_base = (char *)req;
2142 /* 4 for RFC1001 length */
2143 iov[0].iov_len = get_rfc1002_length(req) + 4;
2145 for (i = 1; i < num; i++) {
2146 inc_rfc1001_len(req, size[i]);
2147 le32_add_cpu(&req->BufferLength, size[i]);
2148 iov[i].iov_base = (char *)data[i];
2149 iov[i].iov_len = size[i];
2152 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0);
2153 rsp = (struct smb2_set_info_rsp *)iov[0].iov_base;
2156 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
2160 free_rsp_buf(resp_buftype, rsp);
2166 SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
2167 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2169 struct smb2_file_rename_info info;
2171 unsigned int size[2];
2173 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2175 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2179 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
2180 /* 0 = fail if target already exists */
2181 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2182 info.FileNameLength = cpu_to_le32(len);
2185 size[0] = sizeof(struct smb2_file_rename_info);
2187 data[1] = target_file;
2188 size[1] = len + 2 /* null */;
2190 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
2191 current->tgid, FILE_RENAME_INFORMATION, 2, data,
2198 SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
2199 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2201 struct smb2_file_link_info info;
2203 unsigned int size[2];
2205 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2207 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2211 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
2212 /* 0 = fail if link already exists */
2213 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2214 info.FileNameLength = cpu_to_le32(len);
2217 size[0] = sizeof(struct smb2_file_link_info);
2219 data[1] = target_file;
2220 size[1] = len + 2 /* null */;
2222 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
2223 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
2229 SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2230 u64 volatile_fid, u32 pid, __le64 *eof)
2232 struct smb2_file_eof_info info;
2236 info.EndOfFile = *eof;
2239 size = sizeof(struct smb2_file_eof_info);
2241 return send_set_info(xid, tcon, persistent_fid, volatile_fid, pid,
2242 FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
2246 SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2247 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
2250 size = sizeof(FILE_BASIC_INFO);
2251 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2252 current->tgid, FILE_BASIC_INFORMATION, 1,
2253 (void **)&buf, &size);
2257 SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
2258 const u64 persistent_fid, const u64 volatile_fid,
2262 struct smb2_oplock_break *req = NULL;
2264 cifs_dbg(FYI, "SMB2_oplock_break\n");
2265 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2270 req->VolatileFid = volatile_fid;
2271 req->PersistentFid = persistent_fid;
2272 req->OplockLevel = oplock_level;
2273 req->hdr.CreditRequest = cpu_to_le16(1);
2275 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2276 /* SMB2 buffer freed by function above */
2279 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2280 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
2287 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
2288 struct kstatfs *kst)
2290 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
2291 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
2292 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
2293 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
2294 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
2299 build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
2300 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
2303 struct smb2_query_info_req *req;
2305 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
2307 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
2310 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2314 req->InfoType = SMB2_O_INFO_FILESYSTEM;
2315 req->FileInfoClass = level;
2316 req->PersistentFileId = persistent_fid;
2317 req->VolatileFileId = volatile_fid;
2318 /* 4 for rfc1002 length field and 1 for pad */
2319 req->InputBufferOffset =
2320 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
2321 req->OutputBufferLength = cpu_to_le32(
2322 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
2324 iov->iov_base = (char *)req;
2325 /* 4 for rfc1002 length field */
2326 iov->iov_len = get_rfc1002_length(req) + 4;
2331 SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
2332 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
2334 struct smb2_query_info_rsp *rsp = NULL;
2338 struct cifs_ses *ses = tcon->ses;
2339 struct smb2_fs_full_size_info *info = NULL;
2341 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
2342 sizeof(struct smb2_fs_full_size_info),
2343 persistent_fid, volatile_fid);
2347 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2349 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2352 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2354 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
2355 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
2356 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2357 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2358 sizeof(struct smb2_fs_full_size_info));
2360 copy_fs_info_to_kstatfs(info, fsdata);
2363 free_rsp_buf(resp_buftype, iov.iov_base);
2368 SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2369 u64 persistent_fid, u64 volatile_fid, int level)
2371 struct smb2_query_info_rsp *rsp = NULL;
2374 int resp_buftype, max_len, min_len;
2375 struct cifs_ses *ses = tcon->ses;
2376 unsigned int rsp_len, offset;
2378 if (level == FS_DEVICE_INFORMATION) {
2379 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2380 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2381 } else if (level == FS_ATTRIBUTE_INFORMATION) {
2382 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
2383 min_len = MIN_FS_ATTR_INFO_SIZE;
2384 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
2385 max_len = sizeof(struct smb3_fs_ss_info);
2386 min_len = sizeof(struct smb3_fs_ss_info);
2388 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2392 rc = build_qfs_info_req(&iov, tcon, level, max_len,
2393 persistent_fid, volatile_fid);
2397 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2399 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2402 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2404 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
2405 offset = le16_to_cpu(rsp->OutputBufferOffset);
2406 rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
2410 if (level == FS_ATTRIBUTE_INFORMATION)
2411 memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
2412 + (char *)&rsp->hdr, min_t(unsigned int,
2414 else if (level == FS_DEVICE_INFORMATION)
2415 memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
2416 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
2417 else if (level == FS_SECTOR_SIZE_INFORMATION) {
2418 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
2419 (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
2420 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
2421 tcon->perf_sector_size =
2422 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
2426 free_rsp_buf(resp_buftype, iov.iov_base);
2431 smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
2432 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2433 const __u32 num_lock, struct smb2_lock_element *buf)
2436 struct smb2_lock_req *req = NULL;
2441 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
2443 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
2447 req->hdr.ProcessId = cpu_to_le32(pid);
2448 req->LockCount = cpu_to_le16(num_lock);
2450 req->PersistentFileId = persist_fid;
2451 req->VolatileFileId = volatile_fid;
2453 count = num_lock * sizeof(struct smb2_lock_element);
2454 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
2456 iov[0].iov_base = (char *)req;
2457 /* 4 for rfc1002 length field and count for all locks */
2458 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
2459 iov[1].iov_base = (char *)buf;
2460 iov[1].iov_len = count;
2462 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
2463 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP);
2465 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
2466 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
2473 SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
2474 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2475 const __u64 length, const __u64 offset, const __u32 lock_flags,
2478 struct smb2_lock_element lock;
2480 lock.Offset = cpu_to_le64(offset);
2481 lock.Length = cpu_to_le64(length);
2482 lock.Flags = cpu_to_le32(lock_flags);
2483 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
2484 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
2486 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
2490 SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
2491 __u8 *lease_key, const __le32 lease_state)
2494 struct smb2_lease_ack *req = NULL;
2496 cifs_dbg(FYI, "SMB2_lease_break\n");
2497 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2502 req->hdr.CreditRequest = cpu_to_le16(1);
2503 req->StructureSize = cpu_to_le16(36);
2504 inc_rfc1001_len(req, 12);
2506 memcpy(req->LeaseKey, lease_key, 16);
2507 req->LeaseState = lease_state;
2509 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2510 /* SMB2 buffer freed by function above */
2513 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2514 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);