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);
633 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
634 cifs_dbg(VFS, "SMB3 encryption not supported yet\n");
636 free_rsp_buf(resp_buftype, rsp);
638 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
639 if ((phase == NtLmChallenge) && (rc == 0))
640 goto ssetup_ntlmssp_authenticate;
643 mutex_lock(&server->srv_mutex);
644 if (server->sign && server->ops->generate_signingkey) {
645 rc = server->ops->generate_signingkey(ses);
646 kfree(ses->auth_key.response);
647 ses->auth_key.response = NULL;
650 "SMB3 session key generation failed\n");
651 mutex_unlock(&server->srv_mutex);
655 if (!server->session_estab) {
656 server->sequence_number = 0x2;
657 server->session_estab = true;
659 mutex_unlock(&server->srv_mutex);
661 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
662 spin_lock(&GlobalMid_Lock);
663 ses->status = CifsGood;
664 ses->need_reconnect = false;
665 spin_unlock(&GlobalMid_Lock);
670 kfree(ses->auth_key.response);
671 ses->auth_key.response = NULL;
679 SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
681 struct smb2_logoff_req *req; /* response is also trivial struct */
683 struct TCP_Server_Info *server;
685 cifs_dbg(FYI, "disconnect session %p\n", ses);
687 if (ses && (ses->server))
688 server = ses->server;
692 /* no need to send SMB logoff if uid already closed due to reconnect */
693 if (ses->need_reconnect)
694 goto smb2_session_already_dead;
696 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
700 /* since no tcon, smb2_init can not do this, so do here */
701 req->hdr.SessionId = ses->Suid;
703 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
705 rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0);
707 * No tcon so can't do
708 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
711 smb2_session_already_dead:
715 static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
717 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
720 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
722 /* These are similar values to what Windows uses */
723 static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
725 tcon->max_chunks = 256;
726 tcon->max_bytes_chunk = 1048576;
727 tcon->max_bytes_copy = 16777216;
731 SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
732 struct cifs_tcon *tcon, const struct nls_table *cp)
734 struct smb2_tree_connect_req *req;
735 struct smb2_tree_connect_rsp *rsp = NULL;
740 struct TCP_Server_Info *server;
741 __le16 *unc_path = NULL;
743 cifs_dbg(FYI, "TCON\n");
745 if ((ses->server) && tree)
746 server = ses->server;
750 if (tcon && tcon->bad_network_name)
753 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
754 if (unc_path == NULL)
757 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
759 if (unc_path_len < 2) {
764 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
771 /* since no tcon, smb2_init can not do this, so do here */
772 req->hdr.SessionId = ses->Suid;
773 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
774 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
777 iov[0].iov_base = (char *)req;
778 /* 4 for rfc1002 length field and 1 for pad */
779 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
781 /* Testing shows that buffer offset must be at location of Buffer[0] */
782 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
783 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
784 req->PathLength = cpu_to_le16(unc_path_len - 2);
785 iov[1].iov_base = unc_path;
786 iov[1].iov_len = unc_path_len;
788 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
790 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
791 rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base;
795 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
796 tcon->need_reconnect = true;
798 goto tcon_error_exit;
802 ses->ipc_tid = rsp->hdr.TreeId;
806 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
807 cifs_dbg(FYI, "connection to disk share\n");
808 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
810 cifs_dbg(FYI, "connection to pipe share\n");
811 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
813 cifs_dbg(FYI, "connection to printer\n");
815 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
817 goto tcon_error_exit;
820 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
821 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
822 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
823 tcon->tidStatus = CifsGood;
824 tcon->need_reconnect = false;
825 tcon->tid = rsp->hdr.TreeId;
826 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
828 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
829 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
830 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
831 init_copy_chunk_defaults(tcon);
833 free_rsp_buf(resp_buftype, rsp);
838 if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) {
839 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
840 tcon->bad_network_name = true;
846 SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
848 struct smb2_tree_disconnect_req *req; /* response is trivial */
850 struct TCP_Server_Info *server;
851 struct cifs_ses *ses = tcon->ses;
853 cifs_dbg(FYI, "Tree Disconnect\n");
855 if (ses && (ses->server))
856 server = ses->server;
860 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
863 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
867 rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0);
869 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
875 static struct create_durable *
876 create_durable_buf(void)
878 struct create_durable *buf;
880 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
884 buf->ccontext.DataOffset = cpu_to_le16(offsetof
885 (struct create_durable, Data));
886 buf->ccontext.DataLength = cpu_to_le32(16);
887 buf->ccontext.NameOffset = cpu_to_le16(offsetof
888 (struct create_durable, Name));
889 buf->ccontext.NameLength = cpu_to_le16(4);
897 static struct create_durable *
898 create_reconnect_durable_buf(struct cifs_fid *fid)
900 struct create_durable *buf;
902 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
906 buf->ccontext.DataOffset = cpu_to_le16(offsetof
907 (struct create_durable, Data));
908 buf->ccontext.DataLength = cpu_to_le32(16);
909 buf->ccontext.NameOffset = cpu_to_le16(offsetof
910 (struct create_durable, Name));
911 buf->ccontext.NameLength = cpu_to_le16(4);
912 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
913 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
922 parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
926 struct create_context *cc;
927 unsigned int next = 0;
930 data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
931 cc = (struct create_context *)data_offset;
933 cc = (struct create_context *)((char *)cc + next);
934 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
935 if (le16_to_cpu(cc->NameLength) != 4 ||
936 strncmp(name, "RqLs", 4)) {
937 next = le32_to_cpu(cc->Next);
940 return server->ops->parse_lease_buf(cc, epoch);
947 add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
948 unsigned int *num_iovec, __u8 *oplock)
950 struct smb2_create_req *req = iov[0].iov_base;
951 unsigned int num = *num_iovec;
953 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
954 if (iov[num].iov_base == NULL)
956 iov[num].iov_len = server->vals->create_lease_size;
957 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
958 if (!req->CreateContextsOffset)
959 req->CreateContextsOffset = cpu_to_le32(
960 sizeof(struct smb2_create_req) - 4 +
961 iov[num - 1].iov_len);
962 le32_add_cpu(&req->CreateContextsLength,
963 server->vals->create_lease_size);
964 inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
965 *num_iovec = num + 1;
970 add_durable_context(struct kvec *iov, unsigned int *num_iovec,
971 struct cifs_open_parms *oparms)
973 struct smb2_create_req *req = iov[0].iov_base;
974 unsigned int num = *num_iovec;
976 if (oparms->reconnect) {
977 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
978 /* indicate that we don't need to relock the file */
979 oparms->reconnect = false;
981 iov[num].iov_base = create_durable_buf();
982 if (iov[num].iov_base == NULL)
984 iov[num].iov_len = sizeof(struct create_durable);
985 if (!req->CreateContextsOffset)
986 req->CreateContextsOffset =
987 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
989 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
990 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
991 *num_iovec = num + 1;
996 SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
997 __u8 *oplock, struct smb2_file_all_info *buf,
998 struct smb2_err_rsp **err_buf)
1000 struct smb2_create_req *req;
1001 struct smb2_create_rsp *rsp;
1002 struct TCP_Server_Info *server;
1003 struct cifs_tcon *tcon = oparms->tcon;
1004 struct cifs_ses *ses = tcon->ses;
1008 __le16 *copy_path = NULL;
1011 unsigned int num_iovecs = 2;
1012 __u32 file_attributes = 0;
1014 cifs_dbg(FYI, "create/open\n");
1016 if (ses && (ses->server))
1017 server = ses->server;
1021 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
1025 if (oparms->create_options & CREATE_OPTION_READONLY)
1026 file_attributes |= ATTR_READONLY;
1028 req->ImpersonationLevel = IL_IMPERSONATION;
1029 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
1030 /* File attributes ignored on open (used in create though) */
1031 req->FileAttributes = cpu_to_le32(file_attributes);
1032 req->ShareAccess = FILE_SHARE_ALL_LE;
1033 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1034 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
1035 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
1036 /* do not count rfc1001 len field */
1037 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
1039 iov[0].iov_base = (char *)req;
1040 /* 4 for rfc1002 length field */
1041 iov[0].iov_len = get_rfc1002_length(req) + 4;
1043 /* MUST set path len (NameLength) to 0 opening root of share */
1044 req->NameLength = cpu_to_le16(uni_path_len - 2);
1045 /* -1 since last byte is buf[0] which is sent below (path) */
1047 if (uni_path_len % 8 != 0) {
1048 copy_size = uni_path_len / 8 * 8;
1049 if (copy_size < uni_path_len)
1052 copy_path = kzalloc(copy_size, GFP_KERNEL);
1055 memcpy((char *)copy_path, (const char *)path,
1057 uni_path_len = copy_size;
1061 iov[1].iov_len = uni_path_len;
1062 iov[1].iov_base = path;
1063 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1064 inc_rfc1001_len(req, uni_path_len - 1);
1066 if (!server->oplocks)
1067 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1069 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
1070 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1071 req->RequestedOplockLevel = *oplock;
1073 rc = add_lease_context(server, iov, &num_iovecs, oplock);
1075 cifs_small_buf_release(req);
1081 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1082 /* need to set Next field of lease context if we request it */
1083 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
1084 struct create_context *ccontext =
1085 (struct create_context *)iov[num_iovecs-1].iov_base;
1087 cpu_to_le32(server->vals->create_lease_size);
1089 rc = add_durable_context(iov, &num_iovecs, oparms);
1091 cifs_small_buf_release(req);
1093 kfree(iov[num_iovecs-1].iov_base);
1098 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1099 rsp = (struct smb2_create_rsp *)iov[0].iov_base;
1102 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
1104 *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
1109 oparms->fid->persistent_fid = rsp->PersistentFileId;
1110 oparms->fid->volatile_fid = rsp->VolatileFileId;
1113 memcpy(buf, &rsp->CreationTime, 32);
1114 buf->AllocationSize = rsp->AllocationSize;
1115 buf->EndOfFile = rsp->EndofFile;
1116 buf->Attributes = rsp->FileAttributes;
1117 buf->NumberOfLinks = cpu_to_le32(1);
1118 buf->DeletePending = 0;
1121 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
1122 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
1124 *oplock = rsp->OplockLevel;
1127 free_rsp_buf(resp_buftype, rsp);
1132 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1135 SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1136 u64 volatile_fid, u32 opcode, bool is_fsctl, char *in_data,
1137 u32 indatalen, char **out_data, u32 *plen /* returned data len */)
1139 struct smb2_ioctl_req *req;
1140 struct smb2_ioctl_rsp *rsp;
1141 struct TCP_Server_Info *server;
1142 struct cifs_ses *ses = tcon->ses;
1148 cifs_dbg(FYI, "SMB2 IOCTL\n");
1151 /* zero out returned data len, in case of error */
1155 if (ses && (ses->server))
1156 server = ses->server;
1160 rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req);
1164 req->CtlCode = cpu_to_le32(opcode);
1165 req->PersistentFileId = persistent_fid;
1166 req->VolatileFileId = volatile_fid;
1169 req->InputCount = cpu_to_le32(indatalen);
1170 /* do not set InputOffset if no input data */
1172 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4);
1173 iov[1].iov_base = in_data;
1174 iov[1].iov_len = indatalen;
1179 req->OutputOffset = 0;
1180 req->OutputCount = 0; /* MBZ */
1183 * Could increase MaxOutputResponse, but that would require more
1184 * than one credit. Windows typically sets this smaller, but for some
1185 * ioctls it may be useful to allow server to send more. No point
1186 * limiting what the server can send as long as fits in one credit
1188 req->MaxOutputResponse = cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1191 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
1195 iov[0].iov_base = (char *)req;
1198 * If no input data, the size of ioctl struct in
1199 * protocol spec still includes a 1 byte data buffer,
1200 * but if input data passed to ioctl, we do not
1201 * want to double count this, so we do not send
1202 * the dummy one byte of data in iovec[0] if sending
1203 * input data (in iovec[1]). We also must add 4 bytes
1204 * in first iovec to allow for rfc1002 length field.
1208 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1209 inc_rfc1001_len(req, indatalen - 1);
1211 iov[0].iov_len = get_rfc1002_length(req) + 4;
1214 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1215 rsp = (struct smb2_ioctl_rsp *)iov[0].iov_base;
1219 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1223 /* check if caller wants to look at return data or just return rc */
1224 if ((plen == NULL) || (out_data == NULL))
1227 *plen = le32_to_cpu(rsp->OutputCount);
1229 /* We check for obvious errors in the output buffer length and offset */
1231 goto ioctl_exit; /* server returned no data */
1232 else if (*plen > 0xFF00) {
1233 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
1239 if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
1240 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
1241 le32_to_cpu(rsp->OutputOffset));
1247 *out_data = kmalloc(*plen, GFP_KERNEL);
1248 if (*out_data == NULL) {
1253 memcpy(*out_data, rsp->hdr.ProtocolId + le32_to_cpu(rsp->OutputOffset),
1256 free_rsp_buf(resp_buftype, rsp);
1261 * Individual callers to ioctl worker function follow
1265 SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1266 u64 persistent_fid, u64 volatile_fid)
1269 char *res_key = NULL;
1270 struct compress_ioctl fsctl_input;
1271 char *ret_data = NULL;
1273 fsctl_input.CompressionState =
1274 __constant_cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
1276 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1277 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
1278 (char *)&fsctl_input /* data input */,
1279 2 /* in data len */, &ret_data /* out data */, NULL);
1281 cifs_dbg(FYI, "set compression rc %d\n", rc);
1288 SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1289 u64 persistent_fid, u64 volatile_fid)
1291 struct smb2_close_req *req;
1292 struct smb2_close_rsp *rsp;
1293 struct TCP_Server_Info *server;
1294 struct cifs_ses *ses = tcon->ses;
1299 cifs_dbg(FYI, "Close\n");
1301 if (ses && (ses->server))
1302 server = ses->server;
1306 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1310 req->PersistentFileId = persistent_fid;
1311 req->VolatileFileId = volatile_fid;
1313 iov[0].iov_base = (char *)req;
1314 /* 4 for rfc1002 length field */
1315 iov[0].iov_len = get_rfc1002_length(req) + 4;
1317 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1318 rsp = (struct smb2_close_rsp *)iov[0].iov_base;
1322 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
1326 /* BB FIXME - decode close response, update inode for caching */
1329 free_rsp_buf(resp_buftype, rsp);
1334 validate_buf(unsigned int offset, unsigned int buffer_length,
1335 struct smb2_hdr *hdr, unsigned int min_buf_size)
1338 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
1339 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
1340 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1341 char *end_of_buf = begin_of_buf + buffer_length;
1344 if (buffer_length < min_buf_size) {
1345 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
1346 buffer_length, min_buf_size);
1350 /* check if beyond RFC1001 maximum length */
1351 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
1352 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
1353 buffer_length, smb_len);
1357 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
1358 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
1366 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1367 * Caller must free buffer.
1370 validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
1371 struct smb2_hdr *hdr, unsigned int minbufsize,
1375 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1381 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
1385 memcpy(data, begin_of_buf, buffer_length);
1391 query_info(const unsigned int xid, struct cifs_tcon *tcon,
1392 u64 persistent_fid, u64 volatile_fid, u8 info_class,
1393 size_t output_len, size_t min_len, void *data)
1395 struct smb2_query_info_req *req;
1396 struct smb2_query_info_rsp *rsp = NULL;
1400 struct TCP_Server_Info *server;
1401 struct cifs_ses *ses = tcon->ses;
1403 cifs_dbg(FYI, "Query Info\n");
1405 if (ses && (ses->server))
1406 server = ses->server;
1410 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
1414 req->InfoType = SMB2_O_INFO_FILE;
1415 req->FileInfoClass = info_class;
1416 req->PersistentFileId = persistent_fid;
1417 req->VolatileFileId = volatile_fid;
1418 /* 4 for rfc1002 length field and 1 for Buffer */
1419 req->InputBufferOffset =
1420 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
1421 req->OutputBufferLength = cpu_to_le32(output_len);
1423 iov[0].iov_base = (char *)req;
1424 /* 4 for rfc1002 length field */
1425 iov[0].iov_len = get_rfc1002_length(req) + 4;
1427 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1428 rsp = (struct smb2_query_info_rsp *)iov[0].iov_base;
1431 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
1435 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
1436 le32_to_cpu(rsp->OutputBufferLength),
1437 &rsp->hdr, min_len, data);
1440 free_rsp_buf(resp_buftype, rsp);
1445 SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
1446 u64 persistent_fid, u64 volatile_fid,
1447 struct smb2_file_all_info *data)
1449 return query_info(xid, tcon, persistent_fid, volatile_fid,
1450 FILE_ALL_INFORMATION,
1451 sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
1452 sizeof(struct smb2_file_all_info), data);
1456 SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
1457 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
1459 return query_info(xid, tcon, persistent_fid, volatile_fid,
1460 FILE_INTERNAL_INFORMATION,
1461 sizeof(struct smb2_file_internal_info),
1462 sizeof(struct smb2_file_internal_info), uniqueid);
1466 * This is a no-op for now. We're not really interested in the reply, but
1467 * rather in the fact that the server sent one and that server->lstrp
1470 * FIXME: maybe we should consider checking that the reply matches request?
1473 smb2_echo_callback(struct mid_q_entry *mid)
1475 struct TCP_Server_Info *server = mid->callback_data;
1476 struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf;
1477 unsigned int credits_received = 1;
1479 if (mid->mid_state == MID_RESPONSE_RECEIVED)
1480 credits_received = le16_to_cpu(smb2->hdr.CreditRequest);
1482 DeleteMidQEntry(mid);
1483 add_credits(server, credits_received, CIFS_ECHO_OP);
1487 SMB2_echo(struct TCP_Server_Info *server)
1489 struct smb2_echo_req *req;
1492 struct smb_rqst rqst = { .rq_iov = &iov,
1495 cifs_dbg(FYI, "In echo request\n");
1497 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
1501 req->hdr.CreditRequest = cpu_to_le16(1);
1503 iov.iov_base = (char *)req;
1504 /* 4 for rfc1002 length field */
1505 iov.iov_len = get_rfc1002_length(req) + 4;
1507 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server,
1510 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
1512 cifs_small_buf_release(req);
1517 SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1520 struct smb2_flush_req *req;
1521 struct TCP_Server_Info *server;
1522 struct cifs_ses *ses = tcon->ses;
1527 cifs_dbg(FYI, "Flush\n");
1529 if (ses && (ses->server))
1530 server = ses->server;
1534 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
1538 req->PersistentFileId = persistent_fid;
1539 req->VolatileFileId = volatile_fid;
1541 iov[0].iov_base = (char *)req;
1542 /* 4 for rfc1002 length field */
1543 iov[0].iov_len = get_rfc1002_length(req) + 4;
1545 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1547 if ((rc != 0) && tcon)
1548 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
1550 free_rsp_buf(resp_buftype, iov[0].iov_base);
1555 * To form a chain of read requests, any read requests after the first should
1556 * have the end_of_chain boolean set to true.
1559 smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms,
1560 unsigned int remaining_bytes, int request_type)
1563 struct smb2_read_req *req = NULL;
1565 rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req);
1568 if (io_parms->tcon->ses->server == NULL)
1569 return -ECONNABORTED;
1571 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1573 req->PersistentFileId = io_parms->persistent_fid;
1574 req->VolatileFileId = io_parms->volatile_fid;
1575 req->ReadChannelInfoOffset = 0; /* reserved */
1576 req->ReadChannelInfoLength = 0; /* reserved */
1577 req->Channel = 0; /* reserved */
1578 req->MinimumCount = 0;
1579 req->Length = cpu_to_le32(io_parms->length);
1580 req->Offset = cpu_to_le64(io_parms->offset);
1582 if (request_type & CHAINED_REQUEST) {
1583 if (!(request_type & END_OF_CHAIN)) {
1584 /* 4 for rfc1002 length field */
1585 req->hdr.NextCommand =
1586 cpu_to_le32(get_rfc1002_length(req) + 4);
1587 } else /* END_OF_CHAIN */
1588 req->hdr.NextCommand = 0;
1589 if (request_type & RELATED_REQUEST) {
1590 req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
1592 * Related requests use info from previous read request
1595 req->hdr.SessionId = 0xFFFFFFFF;
1596 req->hdr.TreeId = 0xFFFFFFFF;
1597 req->PersistentFileId = 0xFFFFFFFF;
1598 req->VolatileFileId = 0xFFFFFFFF;
1601 if (remaining_bytes > io_parms->length)
1602 req->RemainingBytes = cpu_to_le32(remaining_bytes);
1604 req->RemainingBytes = 0;
1606 iov[0].iov_base = (char *)req;
1607 /* 4 for rfc1002 length field */
1608 iov[0].iov_len = get_rfc1002_length(req) + 4;
1613 smb2_readv_callback(struct mid_q_entry *mid)
1615 struct cifs_readdata *rdata = mid->callback_data;
1616 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
1617 struct TCP_Server_Info *server = tcon->ses->server;
1618 struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base;
1619 unsigned int credits_received = 1;
1620 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
1622 .rq_pages = rdata->pages,
1623 .rq_npages = rdata->nr_pages,
1624 .rq_pagesz = rdata->pagesz,
1625 .rq_tailsz = rdata->tailsz };
1627 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1628 __func__, mid->mid, mid->mid_state, rdata->result,
1631 switch (mid->mid_state) {
1632 case MID_RESPONSE_RECEIVED:
1633 credits_received = le16_to_cpu(buf->CreditRequest);
1634 /* result already set, check signature */
1638 rc = smb2_verify_signature(&rqst, server);
1640 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
1643 /* FIXME: should this be counted toward the initiating task? */
1644 task_io_account_read(rdata->bytes);
1645 cifs_stats_bytes_read(tcon, rdata->bytes);
1647 case MID_REQUEST_SUBMITTED:
1648 case MID_RETRY_NEEDED:
1649 rdata->result = -EAGAIN;
1652 if (rdata->result != -ENODATA)
1653 rdata->result = -EIO;
1657 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
1659 queue_work(cifsiod_wq, &rdata->work);
1660 DeleteMidQEntry(mid);
1661 add_credits(server, credits_received, 0);
1664 /* smb2_async_readv - send an async write, and set up mid to handle result */
1666 smb2_async_readv(struct cifs_readdata *rdata)
1669 struct smb2_hdr *buf;
1670 struct cifs_io_parms io_parms;
1671 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
1674 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
1675 __func__, rdata->offset, rdata->bytes);
1677 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
1678 io_parms.offset = rdata->offset;
1679 io_parms.length = rdata->bytes;
1680 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
1681 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
1682 io_parms.pid = rdata->pid;
1683 rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0);
1687 buf = (struct smb2_hdr *)rdata->iov.iov_base;
1688 /* 4 for rfc1002 length field */
1689 rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4;
1691 kref_get(&rdata->refcount);
1692 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
1693 cifs_readv_receive, smb2_readv_callback,
1696 kref_put(&rdata->refcount, cifs_readdata_release);
1697 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
1700 cifs_small_buf_release(buf);
1705 SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
1706 unsigned int *nbytes, char **buf, int *buf_type)
1708 int resp_buftype, rc = -EACCES;
1709 struct smb2_read_rsp *rsp = NULL;
1713 rc = smb2_new_read_req(iov, io_parms, 0, 0);
1717 rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1,
1718 &resp_buftype, CIFS_LOG_ERROR);
1720 rsp = (struct smb2_read_rsp *)iov[0].iov_base;
1722 if (rsp->hdr.Status == STATUS_END_OF_FILE) {
1723 free_rsp_buf(resp_buftype, iov[0].iov_base);
1728 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
1729 cifs_dbg(VFS, "Send error in read = %d\n", rc);
1731 *nbytes = le32_to_cpu(rsp->DataLength);
1732 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
1733 (*nbytes > io_parms->length)) {
1734 cifs_dbg(FYI, "bad length %d for count %d\n",
1735 *nbytes, io_parms->length);
1742 memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset,
1744 free_rsp_buf(resp_buftype, iov[0].iov_base);
1745 } else if (resp_buftype != CIFS_NO_BUFFER) {
1746 *buf = iov[0].iov_base;
1747 if (resp_buftype == CIFS_SMALL_BUFFER)
1748 *buf_type = CIFS_SMALL_BUFFER;
1749 else if (resp_buftype == CIFS_LARGE_BUFFER)
1750 *buf_type = CIFS_LARGE_BUFFER;
1756 * Check the mid_state and signature on received buffer (if any), and queue the
1757 * workqueue completion task.
1760 smb2_writev_callback(struct mid_q_entry *mid)
1762 struct cifs_writedata *wdata = mid->callback_data;
1763 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1764 unsigned int written;
1765 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
1766 unsigned int credits_received = 1;
1768 switch (mid->mid_state) {
1769 case MID_RESPONSE_RECEIVED:
1770 credits_received = le16_to_cpu(rsp->hdr.CreditRequest);
1771 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
1772 if (wdata->result != 0)
1775 written = le32_to_cpu(rsp->DataLength);
1777 * Mask off high 16 bits when bytes written as returned
1778 * by the server is greater than bytes requested by the
1779 * client. OS/2 servers are known to set incorrect
1782 if (written > wdata->bytes)
1785 if (written < wdata->bytes)
1786 wdata->result = -ENOSPC;
1788 wdata->bytes = written;
1790 case MID_REQUEST_SUBMITTED:
1791 case MID_RETRY_NEEDED:
1792 wdata->result = -EAGAIN;
1795 wdata->result = -EIO;
1800 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1802 queue_work(cifsiod_wq, &wdata->work);
1803 DeleteMidQEntry(mid);
1804 add_credits(tcon->ses->server, credits_received, 0);
1807 /* smb2_async_writev - send an async write, and set up mid to handle result */
1809 smb2_async_writev(struct cifs_writedata *wdata)
1812 struct smb2_write_req *req = NULL;
1813 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1815 struct smb_rqst rqst;
1817 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
1819 goto async_writev_out;
1821 req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid);
1823 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
1824 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
1825 req->WriteChannelInfoOffset = 0;
1826 req->WriteChannelInfoLength = 0;
1828 req->Offset = cpu_to_le64(wdata->offset);
1829 /* 4 for rfc1002 length field */
1830 req->DataOffset = cpu_to_le16(
1831 offsetof(struct smb2_write_req, Buffer) - 4);
1832 req->RemainingBytes = 0;
1834 /* 4 for rfc1002 length field and 1 for Buffer */
1835 iov.iov_len = get_rfc1002_length(req) + 4 - 1;
1840 rqst.rq_pages = wdata->pages;
1841 rqst.rq_npages = wdata->nr_pages;
1842 rqst.rq_pagesz = wdata->pagesz;
1843 rqst.rq_tailsz = wdata->tailsz;
1845 cifs_dbg(FYI, "async write at %llu %u bytes\n",
1846 wdata->offset, wdata->bytes);
1848 req->Length = cpu_to_le32(wdata->bytes);
1850 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
1852 kref_get(&wdata->refcount);
1853 rc = cifs_call_async(tcon->ses->server, &rqst, NULL,
1854 smb2_writev_callback, wdata, 0);
1857 kref_put(&wdata->refcount, cifs_writedata_release);
1858 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1862 cifs_small_buf_release(req);
1867 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1868 * The length field from io_parms must be at least 1 and indicates a number of
1869 * elements with data to write that begins with position 1 in iov array. All
1870 * data length is specified by count.
1873 SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
1874 unsigned int *nbytes, struct kvec *iov, int n_vec)
1877 struct smb2_write_req *req = NULL;
1878 struct smb2_write_rsp *rsp = NULL;
1885 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
1889 if (io_parms->tcon->ses->server == NULL)
1890 return -ECONNABORTED;
1892 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1894 req->PersistentFileId = io_parms->persistent_fid;
1895 req->VolatileFileId = io_parms->volatile_fid;
1896 req->WriteChannelInfoOffset = 0;
1897 req->WriteChannelInfoLength = 0;
1899 req->Length = cpu_to_le32(io_parms->length);
1900 req->Offset = cpu_to_le64(io_parms->offset);
1901 /* 4 for rfc1002 length field */
1902 req->DataOffset = cpu_to_le16(
1903 offsetof(struct smb2_write_req, Buffer) - 4);
1904 req->RemainingBytes = 0;
1906 iov[0].iov_base = (char *)req;
1907 /* 4 for rfc1002 length field and 1 for Buffer */
1908 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1910 /* length of entire message including data to be written */
1911 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
1913 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
1915 rsp = (struct smb2_write_rsp *)iov[0].iov_base;
1918 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
1919 cifs_dbg(VFS, "Send error in write = %d\n", rc);
1921 *nbytes = le32_to_cpu(rsp->DataLength);
1923 free_rsp_buf(resp_buftype, rsp);
1928 num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
1931 unsigned int entrycount = 0;
1932 unsigned int next_offset = 0;
1933 FILE_DIRECTORY_INFO *entryptr;
1935 if (bufstart == NULL)
1938 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
1941 entryptr = (FILE_DIRECTORY_INFO *)
1942 ((char *)entryptr + next_offset);
1944 if ((char *)entryptr + size > end_of_buf) {
1945 cifs_dbg(VFS, "malformed search entry would overflow\n");
1949 len = le32_to_cpu(entryptr->FileNameLength);
1950 if ((char *)entryptr + len + size > end_of_buf) {
1951 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
1956 *lastentry = (char *)entryptr;
1959 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
1971 SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
1972 u64 persistent_fid, u64 volatile_fid, int index,
1973 struct cifs_search_info *srch_inf)
1975 struct smb2_query_directory_req *req;
1976 struct smb2_query_directory_rsp *rsp = NULL;
1981 unsigned char *bufptr;
1982 struct TCP_Server_Info *server;
1983 struct cifs_ses *ses = tcon->ses;
1984 __le16 asteriks = cpu_to_le16('*');
1986 unsigned int output_size = CIFSMaxBufSize;
1987 size_t info_buf_size;
1989 if (ses && (ses->server))
1990 server = ses->server;
1994 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
1998 switch (srch_inf->info_level) {
1999 case SMB_FIND_FILE_DIRECTORY_INFO:
2000 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
2001 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
2003 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
2004 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
2005 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
2008 cifs_dbg(VFS, "info level %u isn't supported\n",
2009 srch_inf->info_level);
2014 req->FileIndex = cpu_to_le32(index);
2015 req->PersistentFileId = persistent_fid;
2016 req->VolatileFileId = volatile_fid;
2019 bufptr = req->Buffer;
2020 memcpy(bufptr, &asteriks, len);
2022 req->FileNameOffset =
2023 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
2024 req->FileNameLength = cpu_to_le16(len);
2026 * BB could be 30 bytes or so longer if we used SMB2 specific
2027 * buffer lengths, but this is safe and close enough.
2029 output_size = min_t(unsigned int, output_size, server->maxBuf);
2030 output_size = min_t(unsigned int, output_size, 2 << 15);
2031 req->OutputBufferLength = cpu_to_le32(output_size);
2033 iov[0].iov_base = (char *)req;
2034 /* 4 for RFC1001 length and 1 for Buffer */
2035 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2037 iov[1].iov_base = (char *)(req->Buffer);
2038 iov[1].iov_len = len;
2040 inc_rfc1001_len(req, len - 1 /* Buffer */);
2042 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
2043 rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base;
2046 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
2050 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2051 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2056 srch_inf->unicode = true;
2058 if (srch_inf->ntwrk_buf_start) {
2059 if (srch_inf->smallBuf)
2060 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
2062 cifs_buf_release(srch_inf->ntwrk_buf_start);
2064 srch_inf->ntwrk_buf_start = (char *)rsp;
2065 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
2066 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
2067 /* 4 for rfc1002 length field */
2068 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
2069 srch_inf->entries_in_buffer =
2070 num_entries(srch_inf->srch_entries_start, end_of_smb,
2071 &srch_inf->last_entry, info_buf_size);
2072 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
2073 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
2074 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
2075 srch_inf->srch_entries_start, srch_inf->last_entry);
2076 if (resp_buftype == CIFS_LARGE_BUFFER)
2077 srch_inf->smallBuf = false;
2078 else if (resp_buftype == CIFS_SMALL_BUFFER)
2079 srch_inf->smallBuf = true;
2081 cifs_dbg(VFS, "illegal search buffer type\n");
2083 if (rsp->hdr.Status == STATUS_NO_MORE_FILES)
2084 srch_inf->endOfSearch = 1;
2086 srch_inf->endOfSearch = 0;
2091 free_rsp_buf(resp_buftype, rsp);
2096 send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2097 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
2098 unsigned int num, void **data, unsigned int *size)
2100 struct smb2_set_info_req *req;
2101 struct smb2_set_info_rsp *rsp = NULL;
2106 struct TCP_Server_Info *server;
2107 struct cifs_ses *ses = tcon->ses;
2109 if (ses && (ses->server))
2110 server = ses->server;
2117 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
2121 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
2127 req->hdr.ProcessId = cpu_to_le32(pid);
2129 req->InfoType = SMB2_O_INFO_FILE;
2130 req->FileInfoClass = info_class;
2131 req->PersistentFileId = persistent_fid;
2132 req->VolatileFileId = volatile_fid;
2134 /* 4 for RFC1001 length and 1 for Buffer */
2136 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
2137 req->BufferLength = cpu_to_le32(*size);
2139 inc_rfc1001_len(req, *size - 1 /* Buffer */);
2141 memcpy(req->Buffer, *data, *size);
2143 iov[0].iov_base = (char *)req;
2144 /* 4 for RFC1001 length */
2145 iov[0].iov_len = get_rfc1002_length(req) + 4;
2147 for (i = 1; i < num; i++) {
2148 inc_rfc1001_len(req, size[i]);
2149 le32_add_cpu(&req->BufferLength, size[i]);
2150 iov[i].iov_base = (char *)data[i];
2151 iov[i].iov_len = size[i];
2154 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0);
2155 rsp = (struct smb2_set_info_rsp *)iov[0].iov_base;
2158 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
2162 free_rsp_buf(resp_buftype, rsp);
2168 SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
2169 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2171 struct smb2_file_rename_info info;
2173 unsigned int size[2];
2175 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2177 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2181 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
2182 /* 0 = fail if target already exists */
2183 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2184 info.FileNameLength = cpu_to_le32(len);
2187 size[0] = sizeof(struct smb2_file_rename_info);
2189 data[1] = target_file;
2190 size[1] = len + 2 /* null */;
2192 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
2193 current->tgid, FILE_RENAME_INFORMATION, 2, data,
2200 SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
2201 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2203 struct smb2_file_link_info info;
2205 unsigned int size[2];
2207 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2209 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2213 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
2214 /* 0 = fail if link already exists */
2215 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2216 info.FileNameLength = cpu_to_le32(len);
2219 size[0] = sizeof(struct smb2_file_link_info);
2221 data[1] = target_file;
2222 size[1] = len + 2 /* null */;
2224 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
2225 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
2231 SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2232 u64 volatile_fid, u32 pid, __le64 *eof)
2234 struct smb2_file_eof_info info;
2238 info.EndOfFile = *eof;
2241 size = sizeof(struct smb2_file_eof_info);
2243 return send_set_info(xid, tcon, persistent_fid, volatile_fid, pid,
2244 FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
2248 SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2249 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
2252 size = sizeof(FILE_BASIC_INFO);
2253 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2254 current->tgid, FILE_BASIC_INFORMATION, 1,
2255 (void **)&buf, &size);
2259 SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
2260 const u64 persistent_fid, const u64 volatile_fid,
2264 struct smb2_oplock_break *req = NULL;
2266 cifs_dbg(FYI, "SMB2_oplock_break\n");
2267 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2272 req->VolatileFid = volatile_fid;
2273 req->PersistentFid = persistent_fid;
2274 req->OplockLevel = oplock_level;
2275 req->hdr.CreditRequest = cpu_to_le16(1);
2277 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2278 /* SMB2 buffer freed by function above */
2281 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2282 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
2289 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
2290 struct kstatfs *kst)
2292 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
2293 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
2294 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
2295 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
2296 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
2301 build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
2302 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
2305 struct smb2_query_info_req *req;
2307 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
2309 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
2312 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2316 req->InfoType = SMB2_O_INFO_FILESYSTEM;
2317 req->FileInfoClass = level;
2318 req->PersistentFileId = persistent_fid;
2319 req->VolatileFileId = volatile_fid;
2320 /* 4 for rfc1002 length field and 1 for pad */
2321 req->InputBufferOffset =
2322 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
2323 req->OutputBufferLength = cpu_to_le32(
2324 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
2326 iov->iov_base = (char *)req;
2327 /* 4 for rfc1002 length field */
2328 iov->iov_len = get_rfc1002_length(req) + 4;
2333 SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
2334 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
2336 struct smb2_query_info_rsp *rsp = NULL;
2340 struct cifs_ses *ses = tcon->ses;
2341 struct smb2_fs_full_size_info *info = NULL;
2343 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
2344 sizeof(struct smb2_fs_full_size_info),
2345 persistent_fid, volatile_fid);
2349 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2351 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2354 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2356 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
2357 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
2358 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2359 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2360 sizeof(struct smb2_fs_full_size_info));
2362 copy_fs_info_to_kstatfs(info, fsdata);
2365 free_rsp_buf(resp_buftype, iov.iov_base);
2370 SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2371 u64 persistent_fid, u64 volatile_fid, int level)
2373 struct smb2_query_info_rsp *rsp = NULL;
2376 int resp_buftype, max_len, min_len;
2377 struct cifs_ses *ses = tcon->ses;
2378 unsigned int rsp_len, offset;
2380 if (level == FS_DEVICE_INFORMATION) {
2381 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2382 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2383 } else if (level == FS_ATTRIBUTE_INFORMATION) {
2384 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
2385 min_len = MIN_FS_ATTR_INFO_SIZE;
2386 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
2387 max_len = sizeof(struct smb3_fs_ss_info);
2388 min_len = sizeof(struct smb3_fs_ss_info);
2390 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2394 rc = build_qfs_info_req(&iov, tcon, level, max_len,
2395 persistent_fid, volatile_fid);
2399 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2401 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2404 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2406 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
2407 offset = le16_to_cpu(rsp->OutputBufferOffset);
2408 rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
2412 if (level == FS_ATTRIBUTE_INFORMATION)
2413 memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
2414 + (char *)&rsp->hdr, min_t(unsigned int,
2416 else if (level == FS_DEVICE_INFORMATION)
2417 memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
2418 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
2419 else if (level == FS_SECTOR_SIZE_INFORMATION) {
2420 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
2421 (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
2422 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
2423 tcon->perf_sector_size =
2424 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
2428 free_rsp_buf(resp_buftype, iov.iov_base);
2433 smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
2434 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2435 const __u32 num_lock, struct smb2_lock_element *buf)
2438 struct smb2_lock_req *req = NULL;
2443 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
2445 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
2449 req->hdr.ProcessId = cpu_to_le32(pid);
2450 req->LockCount = cpu_to_le16(num_lock);
2452 req->PersistentFileId = persist_fid;
2453 req->VolatileFileId = volatile_fid;
2455 count = num_lock * sizeof(struct smb2_lock_element);
2456 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
2458 iov[0].iov_base = (char *)req;
2459 /* 4 for rfc1002 length field and count for all locks */
2460 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
2461 iov[1].iov_base = (char *)buf;
2462 iov[1].iov_len = count;
2464 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
2465 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP);
2467 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
2468 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
2475 SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
2476 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2477 const __u64 length, const __u64 offset, const __u32 lock_flags,
2480 struct smb2_lock_element lock;
2482 lock.Offset = cpu_to_le64(offset);
2483 lock.Length = cpu_to_le64(length);
2484 lock.Flags = cpu_to_le32(lock_flags);
2485 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
2486 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
2488 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
2492 SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
2493 __u8 *lease_key, const __le32 lease_state)
2496 struct smb2_lease_ack *req = NULL;
2498 cifs_dbg(FYI, "SMB2_lease_break\n");
2499 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2504 req->hdr.CreditRequest = cpu_to_le16(1);
2505 req->StructureSize = cpu_to_le16(36);
2506 inc_rfc1001_len(req, 12);
2508 memcpy(req->LeaseKey, lease_key, 16);
2509 req->LeaseState = lease_state;
2511 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2512 /* SMB2 buffer freed by function above */
2515 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2516 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);