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 /* set it to the maximum buffer size value we can send with 1 credit */
417 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
418 SMB2_MAX_BUFFER_SIZE);
419 server->max_read = le32_to_cpu(rsp->MaxReadSize);
420 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
421 /* BB Do we need to validate the SecurityMode? */
422 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
423 server->capabilities = le32_to_cpu(rsp->Capabilities);
425 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
427 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
430 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
432 * ses->sectype = RawNTLMSSP;
433 * but for time being this is our only auth choice so doesn't matter.
434 * We just found a server which sets blob length to zero expecting raw.
436 if (blob_length == 0)
437 cifs_dbg(FYI, "missing security blob on negprot\n");
439 rc = cifs_enable_signing(server, ses->sign);
440 #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
444 rc = decode_neg_token_init(security_blob, blob_length,
455 free_rsp_buf(resp_buftype, rsp);
459 int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
462 struct validate_negotiate_info_req vneg_inbuf;
463 struct validate_negotiate_info_rsp *pneg_rsp;
466 cifs_dbg(FYI, "validate negotiate\n");
469 * validation ioctl must be signed, so no point sending this if we
470 * can not sign it. We could eventually change this to selectively
471 * sign just this, the first and only signed request on a connection.
472 * This is good enough for now since a user who wants better security
473 * would also enable signing on the mount. Having validation of
474 * negotiate info for signed connections helps reduce attack vectors
476 if (tcon->ses->server->sign == false)
477 return 0; /* validation requires signing */
479 vneg_inbuf.Capabilities =
480 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
481 memcpy(vneg_inbuf.Guid, cifs_client_guid, SMB2_CLIENT_GUID_SIZE);
484 vneg_inbuf.SecurityMode =
485 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
486 else if (global_secflags & CIFSSEC_MAY_SIGN)
487 vneg_inbuf.SecurityMode =
488 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
490 vneg_inbuf.SecurityMode = 0;
492 vneg_inbuf.DialectCount = cpu_to_le16(1);
493 vneg_inbuf.Dialects[0] =
494 cpu_to_le16(tcon->ses->server->vals->protocol_id);
496 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
497 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
498 (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
499 (char **)&pneg_rsp, &rsplen);
502 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
506 if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
507 cifs_dbg(VFS, "invalid size of protocol negotiate response\n");
511 /* check validate negotiate info response matches what we got earlier */
512 if (pneg_rsp->Dialect !=
513 cpu_to_le16(tcon->ses->server->vals->protocol_id))
516 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
519 /* do not validate server guid because not saved at negprot time yet */
521 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
522 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
525 /* validate negotiate successful */
526 cifs_dbg(FYI, "validate negotiate info successful\n");
530 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
535 SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
536 const struct nls_table *nls_cp)
538 struct smb2_sess_setup_req *req;
539 struct smb2_sess_setup_rsp *rsp = NULL;
543 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
544 struct TCP_Server_Info *server = ses->server;
547 char *ntlmssp_blob = NULL;
548 bool use_spnego = false; /* else use raw ntlmssp */
550 cifs_dbg(FYI, "Session Setup\n");
553 WARN(1, "%s: server is NULL!\n", __func__);
558 * If we are here due to reconnect, free per-smb session key
559 * in case signing was required.
561 kfree(ses->auth_key.response);
562 ses->auth_key.response = NULL;
565 * If memory allocation is successful, caller of this function
568 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
571 ses->ntlmssp->sesskey_per_smbsess = true;
573 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
574 ses->sectype = RawNTLMSSP;
576 ssetup_ntlmssp_authenticate:
577 if (phase == NtLmChallenge)
578 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
580 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
584 req->hdr.SessionId = 0; /* First session, not a reauthenticate */
585 req->VcNumber = 0; /* MBZ */
586 /* to enable echos and oplocks */
587 req->hdr.CreditRequest = cpu_to_le16(3);
589 /* only one of SMB2 signing flags may be set in SMB2 request */
591 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
592 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
593 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
595 req->SecurityMode = 0;
597 req->Capabilities = 0;
598 req->Channel = 0; /* MBZ */
600 iov[0].iov_base = (char *)req;
601 /* 4 for rfc1002 length field and 1 for pad */
602 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
603 if (phase == NtLmNegotiate) {
604 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
606 if (ntlmssp_blob == NULL) {
610 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
612 /* blob_length = build_spnego_ntlmssp_blob(
614 sizeof(struct _NEGOTIATE_MESSAGE),
616 /* BB eventually need to add this */
617 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
622 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
623 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
624 security_blob = ntlmssp_blob;
626 } else if (phase == NtLmAuthenticate) {
627 req->hdr.SessionId = ses->Suid;
628 ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500,
630 if (ntlmssp_blob == NULL) {
634 rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses,
637 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n",
639 goto ssetup_exit; /* BB double check error handling */
642 /* blob_length = build_spnego_ntlmssp_blob(
646 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
651 security_blob = ntlmssp_blob;
654 cifs_dbg(VFS, "illegal ntlmssp phase\n");
659 /* Testing shows that buffer offset must be at location of Buffer[0] */
660 req->SecurityBufferOffset =
661 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
662 1 /* pad */ - 4 /* rfc1001 len */);
663 req->SecurityBufferLength = cpu_to_le16(blob_length);
664 iov[1].iov_base = security_blob;
665 iov[1].iov_len = blob_length;
667 inc_rfc1001_len(req, blob_length - 1 /* pad */);
669 /* BB add code to build os and lm fields */
671 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype,
672 CIFS_LOG_ERROR | CIFS_NEG_OP);
674 kfree(security_blob);
675 rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base;
676 if (resp_buftype != CIFS_NO_BUFFER &&
677 rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) {
678 if (phase != NtLmNegotiate) {
679 cifs_dbg(VFS, "Unexpected more processing error\n");
682 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
683 le16_to_cpu(rsp->SecurityBufferOffset)) {
684 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
685 le16_to_cpu(rsp->SecurityBufferOffset));
690 /* NTLMSSP Negotiate sent now processing challenge (response) */
691 phase = NtLmChallenge; /* process ntlmssp challenge */
692 rc = 0; /* MORE_PROCESSING is not an error here but expected */
693 ses->Suid = rsp->hdr.SessionId;
694 rc = decode_ntlmssp_challenge(rsp->Buffer,
695 le16_to_cpu(rsp->SecurityBufferLength), ses);
699 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
700 * but at least the raw NTLMSSP case works.
703 * No tcon so can't do
704 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
709 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
710 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
711 cifs_dbg(VFS, "SMB3 encryption not supported yet\n");
713 free_rsp_buf(resp_buftype, rsp);
715 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
716 if ((phase == NtLmChallenge) && (rc == 0))
717 goto ssetup_ntlmssp_authenticate;
720 mutex_lock(&server->srv_mutex);
721 if (server->sign && server->ops->generate_signingkey) {
722 rc = server->ops->generate_signingkey(ses);
723 kfree(ses->auth_key.response);
724 ses->auth_key.response = NULL;
727 "SMB3 session key generation failed\n");
728 mutex_unlock(&server->srv_mutex);
732 if (!server->session_estab) {
733 server->sequence_number = 0x2;
734 server->session_estab = true;
736 mutex_unlock(&server->srv_mutex);
738 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
739 spin_lock(&GlobalMid_Lock);
740 ses->status = CifsGood;
741 ses->need_reconnect = false;
742 spin_unlock(&GlobalMid_Lock);
747 kfree(ses->auth_key.response);
748 ses->auth_key.response = NULL;
756 SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
758 struct smb2_logoff_req *req; /* response is also trivial struct */
760 struct TCP_Server_Info *server;
762 cifs_dbg(FYI, "disconnect session %p\n", ses);
764 if (ses && (ses->server))
765 server = ses->server;
769 /* no need to send SMB logoff if uid already closed due to reconnect */
770 if (ses->need_reconnect)
771 goto smb2_session_already_dead;
773 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
777 /* since no tcon, smb2_init can not do this, so do here */
778 req->hdr.SessionId = ses->Suid;
780 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
782 rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0);
784 * No tcon so can't do
785 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
788 smb2_session_already_dead:
792 static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
794 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
797 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
799 /* These are similar values to what Windows uses */
800 static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
802 tcon->max_chunks = 256;
803 tcon->max_bytes_chunk = 1048576;
804 tcon->max_bytes_copy = 16777216;
808 SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
809 struct cifs_tcon *tcon, const struct nls_table *cp)
811 struct smb2_tree_connect_req *req;
812 struct smb2_tree_connect_rsp *rsp = NULL;
817 struct TCP_Server_Info *server;
818 __le16 *unc_path = NULL;
820 cifs_dbg(FYI, "TCON\n");
822 if ((ses->server) && tree)
823 server = ses->server;
827 if (tcon && tcon->bad_network_name)
830 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
831 if (unc_path == NULL)
834 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
836 if (unc_path_len < 2) {
841 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
848 /* since no tcon, smb2_init can not do this, so do here */
849 req->hdr.SessionId = ses->Suid;
850 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
851 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
854 iov[0].iov_base = (char *)req;
855 /* 4 for rfc1002 length field and 1 for pad */
856 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
858 /* Testing shows that buffer offset must be at location of Buffer[0] */
859 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
860 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
861 req->PathLength = cpu_to_le16(unc_path_len - 2);
862 iov[1].iov_base = unc_path;
863 iov[1].iov_len = unc_path_len;
865 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
867 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
868 rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base;
872 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
873 tcon->need_reconnect = true;
875 goto tcon_error_exit;
879 ses->ipc_tid = rsp->hdr.TreeId;
883 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
884 cifs_dbg(FYI, "connection to disk share\n");
885 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
887 cifs_dbg(FYI, "connection to pipe share\n");
888 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
890 cifs_dbg(FYI, "connection to printer\n");
892 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
894 goto tcon_error_exit;
897 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
898 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
899 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
900 tcon->tidStatus = CifsGood;
901 tcon->need_reconnect = false;
902 tcon->tid = rsp->hdr.TreeId;
903 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
905 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
906 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
907 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
908 init_copy_chunk_defaults(tcon);
909 if (tcon->ses->server->ops->validate_negotiate)
910 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
912 free_rsp_buf(resp_buftype, rsp);
917 if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) {
918 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
919 tcon->bad_network_name = true;
925 SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
927 struct smb2_tree_disconnect_req *req; /* response is trivial */
929 struct TCP_Server_Info *server;
930 struct cifs_ses *ses = tcon->ses;
932 cifs_dbg(FYI, "Tree Disconnect\n");
934 if (ses && (ses->server))
935 server = ses->server;
939 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
942 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
946 rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0);
948 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
954 static struct create_durable *
955 create_durable_buf(void)
957 struct create_durable *buf;
959 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
963 buf->ccontext.DataOffset = cpu_to_le16(offsetof
964 (struct create_durable, Data));
965 buf->ccontext.DataLength = cpu_to_le32(16);
966 buf->ccontext.NameOffset = cpu_to_le16(offsetof
967 (struct create_durable, Name));
968 buf->ccontext.NameLength = cpu_to_le16(4);
976 static struct create_durable *
977 create_reconnect_durable_buf(struct cifs_fid *fid)
979 struct create_durable *buf;
981 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
985 buf->ccontext.DataOffset = cpu_to_le16(offsetof
986 (struct create_durable, Data));
987 buf->ccontext.DataLength = cpu_to_le32(16);
988 buf->ccontext.NameOffset = cpu_to_le16(offsetof
989 (struct create_durable, Name));
990 buf->ccontext.NameLength = cpu_to_le16(4);
991 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
992 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
1001 parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
1002 unsigned int *epoch)
1005 struct create_context *cc;
1006 unsigned int next = 0;
1009 data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
1010 cc = (struct create_context *)data_offset;
1012 cc = (struct create_context *)((char *)cc + next);
1013 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
1014 if (le16_to_cpu(cc->NameLength) != 4 ||
1015 strncmp(name, "RqLs", 4)) {
1016 next = le32_to_cpu(cc->Next);
1019 return server->ops->parse_lease_buf(cc, epoch);
1020 } while (next != 0);
1026 add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1027 unsigned int *num_iovec, __u8 *oplock)
1029 struct smb2_create_req *req = iov[0].iov_base;
1030 unsigned int num = *num_iovec;
1032 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
1033 if (iov[num].iov_base == NULL)
1035 iov[num].iov_len = server->vals->create_lease_size;
1036 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1037 if (!req->CreateContextsOffset)
1038 req->CreateContextsOffset = cpu_to_le32(
1039 sizeof(struct smb2_create_req) - 4 +
1040 iov[num - 1].iov_len);
1041 le32_add_cpu(&req->CreateContextsLength,
1042 server->vals->create_lease_size);
1043 inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
1044 *num_iovec = num + 1;
1049 add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1050 struct cifs_open_parms *oparms)
1052 struct smb2_create_req *req = iov[0].iov_base;
1053 unsigned int num = *num_iovec;
1055 if (oparms->reconnect) {
1056 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1057 /* indicate that we don't need to relock the file */
1058 oparms->reconnect = false;
1060 iov[num].iov_base = create_durable_buf();
1061 if (iov[num].iov_base == NULL)
1063 iov[num].iov_len = sizeof(struct create_durable);
1064 if (!req->CreateContextsOffset)
1065 req->CreateContextsOffset =
1066 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1068 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
1069 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
1070 *num_iovec = num + 1;
1075 SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
1076 __u8 *oplock, struct smb2_file_all_info *buf,
1077 struct smb2_err_rsp **err_buf)
1079 struct smb2_create_req *req;
1080 struct smb2_create_rsp *rsp;
1081 struct TCP_Server_Info *server;
1082 struct cifs_tcon *tcon = oparms->tcon;
1083 struct cifs_ses *ses = tcon->ses;
1087 __le16 *copy_path = NULL;
1090 unsigned int num_iovecs = 2;
1091 __u32 file_attributes = 0;
1092 char *dhc_buf = NULL, *lc_buf = NULL;
1094 cifs_dbg(FYI, "create/open\n");
1096 if (ses && (ses->server))
1097 server = ses->server;
1101 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
1105 if (oparms->create_options & CREATE_OPTION_READONLY)
1106 file_attributes |= ATTR_READONLY;
1108 req->ImpersonationLevel = IL_IMPERSONATION;
1109 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
1110 /* File attributes ignored on open (used in create though) */
1111 req->FileAttributes = cpu_to_le32(file_attributes);
1112 req->ShareAccess = FILE_SHARE_ALL_LE;
1113 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1114 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
1115 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
1116 /* do not count rfc1001 len field */
1117 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
1119 iov[0].iov_base = (char *)req;
1120 /* 4 for rfc1002 length field */
1121 iov[0].iov_len = get_rfc1002_length(req) + 4;
1123 /* MUST set path len (NameLength) to 0 opening root of share */
1124 req->NameLength = cpu_to_le16(uni_path_len - 2);
1125 /* -1 since last byte is buf[0] which is sent below (path) */
1127 if (uni_path_len % 8 != 0) {
1128 copy_size = uni_path_len / 8 * 8;
1129 if (copy_size < uni_path_len)
1132 copy_path = kzalloc(copy_size, GFP_KERNEL);
1135 memcpy((char *)copy_path, (const char *)path,
1137 uni_path_len = copy_size;
1141 iov[1].iov_len = uni_path_len;
1142 iov[1].iov_base = path;
1143 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1144 inc_rfc1001_len(req, uni_path_len - 1);
1146 if (!server->oplocks)
1147 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1149 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
1150 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1151 req->RequestedOplockLevel = *oplock;
1153 rc = add_lease_context(server, iov, &num_iovecs, oplock);
1155 cifs_small_buf_release(req);
1159 lc_buf = iov[num_iovecs-1].iov_base;
1162 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1163 /* need to set Next field of lease context if we request it */
1164 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
1165 struct create_context *ccontext =
1166 (struct create_context *)iov[num_iovecs-1].iov_base;
1168 cpu_to_le32(server->vals->create_lease_size);
1170 rc = add_durable_context(iov, &num_iovecs, oparms);
1172 cifs_small_buf_release(req);
1177 dhc_buf = iov[num_iovecs-1].iov_base;
1180 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1181 rsp = (struct smb2_create_rsp *)iov[0].iov_base;
1184 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
1186 *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
1191 oparms->fid->persistent_fid = rsp->PersistentFileId;
1192 oparms->fid->volatile_fid = rsp->VolatileFileId;
1195 memcpy(buf, &rsp->CreationTime, 32);
1196 buf->AllocationSize = rsp->AllocationSize;
1197 buf->EndOfFile = rsp->EndofFile;
1198 buf->Attributes = rsp->FileAttributes;
1199 buf->NumberOfLinks = cpu_to_le32(1);
1200 buf->DeletePending = 0;
1203 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
1204 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
1206 *oplock = rsp->OplockLevel;
1211 free_rsp_buf(resp_buftype, rsp);
1216 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1219 SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1220 u64 volatile_fid, u32 opcode, bool is_fsctl, char *in_data,
1221 u32 indatalen, char **out_data, u32 *plen /* returned data len */)
1223 struct smb2_ioctl_req *req;
1224 struct smb2_ioctl_rsp *rsp;
1225 struct TCP_Server_Info *server;
1226 struct cifs_ses *ses = tcon->ses;
1232 cifs_dbg(FYI, "SMB2 IOCTL\n");
1235 /* zero out returned data len, in case of error */
1239 if (ses && (ses->server))
1240 server = ses->server;
1244 rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req);
1248 req->CtlCode = cpu_to_le32(opcode);
1249 req->PersistentFileId = persistent_fid;
1250 req->VolatileFileId = volatile_fid;
1253 req->InputCount = cpu_to_le32(indatalen);
1254 /* do not set InputOffset if no input data */
1256 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4);
1257 iov[1].iov_base = in_data;
1258 iov[1].iov_len = indatalen;
1263 req->OutputOffset = 0;
1264 req->OutputCount = 0; /* MBZ */
1267 * Could increase MaxOutputResponse, but that would require more
1268 * than one credit. Windows typically sets this smaller, but for some
1269 * ioctls it may be useful to allow server to send more. No point
1270 * limiting what the server can send as long as fits in one credit
1272 req->MaxOutputResponse = cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1275 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
1279 iov[0].iov_base = (char *)req;
1282 * If no input data, the size of ioctl struct in
1283 * protocol spec still includes a 1 byte data buffer,
1284 * but if input data passed to ioctl, we do not
1285 * want to double count this, so we do not send
1286 * the dummy one byte of data in iovec[0] if sending
1287 * input data (in iovec[1]). We also must add 4 bytes
1288 * in first iovec to allow for rfc1002 length field.
1292 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1293 inc_rfc1001_len(req, indatalen - 1);
1295 iov[0].iov_len = get_rfc1002_length(req) + 4;
1298 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1299 rsp = (struct smb2_ioctl_rsp *)iov[0].iov_base;
1301 if ((rc != 0) && (rc != -EINVAL)) {
1303 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1305 } else if (rc == -EINVAL) {
1306 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
1307 (opcode != FSCTL_SRV_COPYCHUNK)) {
1309 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1314 /* check if caller wants to look at return data or just return rc */
1315 if ((plen == NULL) || (out_data == NULL))
1318 *plen = le32_to_cpu(rsp->OutputCount);
1320 /* We check for obvious errors in the output buffer length and offset */
1322 goto ioctl_exit; /* server returned no data */
1323 else if (*plen > 0xFF00) {
1324 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
1330 if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
1331 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
1332 le32_to_cpu(rsp->OutputOffset));
1338 *out_data = kmalloc(*plen, GFP_KERNEL);
1339 if (*out_data == NULL) {
1344 memcpy(*out_data, rsp->hdr.ProtocolId + le32_to_cpu(rsp->OutputOffset),
1347 free_rsp_buf(resp_buftype, rsp);
1352 * Individual callers to ioctl worker function follow
1356 SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1357 u64 persistent_fid, u64 volatile_fid)
1360 char *res_key = NULL;
1361 struct compress_ioctl fsctl_input;
1362 char *ret_data = NULL;
1364 fsctl_input.CompressionState =
1365 __constant_cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
1367 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1368 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
1369 (char *)&fsctl_input /* data input */,
1370 2 /* in data len */, &ret_data /* out data */, NULL);
1372 cifs_dbg(FYI, "set compression rc %d\n", rc);
1379 SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1380 u64 persistent_fid, u64 volatile_fid)
1382 struct smb2_close_req *req;
1383 struct smb2_close_rsp *rsp;
1384 struct TCP_Server_Info *server;
1385 struct cifs_ses *ses = tcon->ses;
1390 cifs_dbg(FYI, "Close\n");
1392 if (ses && (ses->server))
1393 server = ses->server;
1397 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1401 req->PersistentFileId = persistent_fid;
1402 req->VolatileFileId = volatile_fid;
1404 iov[0].iov_base = (char *)req;
1405 /* 4 for rfc1002 length field */
1406 iov[0].iov_len = get_rfc1002_length(req) + 4;
1408 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1409 rsp = (struct smb2_close_rsp *)iov[0].iov_base;
1413 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
1417 /* BB FIXME - decode close response, update inode for caching */
1420 free_rsp_buf(resp_buftype, rsp);
1425 validate_buf(unsigned int offset, unsigned int buffer_length,
1426 struct smb2_hdr *hdr, unsigned int min_buf_size)
1429 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
1430 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
1431 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1432 char *end_of_buf = begin_of_buf + buffer_length;
1435 if (buffer_length < min_buf_size) {
1436 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
1437 buffer_length, min_buf_size);
1441 /* check if beyond RFC1001 maximum length */
1442 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
1443 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
1444 buffer_length, smb_len);
1448 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
1449 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
1457 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1458 * Caller must free buffer.
1461 validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
1462 struct smb2_hdr *hdr, unsigned int minbufsize,
1466 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1472 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
1476 memcpy(data, begin_of_buf, buffer_length);
1482 query_info(const unsigned int xid, struct cifs_tcon *tcon,
1483 u64 persistent_fid, u64 volatile_fid, u8 info_class,
1484 size_t output_len, size_t min_len, void *data)
1486 struct smb2_query_info_req *req;
1487 struct smb2_query_info_rsp *rsp = NULL;
1491 struct TCP_Server_Info *server;
1492 struct cifs_ses *ses = tcon->ses;
1494 cifs_dbg(FYI, "Query Info\n");
1496 if (ses && (ses->server))
1497 server = ses->server;
1501 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
1505 req->InfoType = SMB2_O_INFO_FILE;
1506 req->FileInfoClass = info_class;
1507 req->PersistentFileId = persistent_fid;
1508 req->VolatileFileId = volatile_fid;
1509 /* 4 for rfc1002 length field and 1 for Buffer */
1510 req->InputBufferOffset =
1511 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
1512 req->OutputBufferLength = cpu_to_le32(output_len);
1514 iov[0].iov_base = (char *)req;
1515 /* 4 for rfc1002 length field */
1516 iov[0].iov_len = get_rfc1002_length(req) + 4;
1518 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1519 rsp = (struct smb2_query_info_rsp *)iov[0].iov_base;
1522 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
1526 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
1527 le32_to_cpu(rsp->OutputBufferLength),
1528 &rsp->hdr, min_len, data);
1531 free_rsp_buf(resp_buftype, rsp);
1536 SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
1537 u64 persistent_fid, u64 volatile_fid,
1538 struct smb2_file_all_info *data)
1540 return query_info(xid, tcon, persistent_fid, volatile_fid,
1541 FILE_ALL_INFORMATION,
1542 sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
1543 sizeof(struct smb2_file_all_info), data);
1547 SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
1548 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
1550 return query_info(xid, tcon, persistent_fid, volatile_fid,
1551 FILE_INTERNAL_INFORMATION,
1552 sizeof(struct smb2_file_internal_info),
1553 sizeof(struct smb2_file_internal_info), uniqueid);
1557 * This is a no-op for now. We're not really interested in the reply, but
1558 * rather in the fact that the server sent one and that server->lstrp
1561 * FIXME: maybe we should consider checking that the reply matches request?
1564 smb2_echo_callback(struct mid_q_entry *mid)
1566 struct TCP_Server_Info *server = mid->callback_data;
1567 struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf;
1568 unsigned int credits_received = 1;
1570 if (mid->mid_state == MID_RESPONSE_RECEIVED)
1571 credits_received = le16_to_cpu(smb2->hdr.CreditRequest);
1573 DeleteMidQEntry(mid);
1574 add_credits(server, credits_received, CIFS_ECHO_OP);
1578 SMB2_echo(struct TCP_Server_Info *server)
1580 struct smb2_echo_req *req;
1583 struct smb_rqst rqst = { .rq_iov = &iov,
1586 cifs_dbg(FYI, "In echo request\n");
1588 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
1592 req->hdr.CreditRequest = cpu_to_le16(1);
1594 iov.iov_base = (char *)req;
1595 /* 4 for rfc1002 length field */
1596 iov.iov_len = get_rfc1002_length(req) + 4;
1598 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server,
1601 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
1603 cifs_small_buf_release(req);
1608 SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1611 struct smb2_flush_req *req;
1612 struct TCP_Server_Info *server;
1613 struct cifs_ses *ses = tcon->ses;
1618 cifs_dbg(FYI, "Flush\n");
1620 if (ses && (ses->server))
1621 server = ses->server;
1625 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
1629 req->PersistentFileId = persistent_fid;
1630 req->VolatileFileId = volatile_fid;
1632 iov[0].iov_base = (char *)req;
1633 /* 4 for rfc1002 length field */
1634 iov[0].iov_len = get_rfc1002_length(req) + 4;
1636 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1638 if ((rc != 0) && tcon)
1639 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
1641 free_rsp_buf(resp_buftype, iov[0].iov_base);
1646 * To form a chain of read requests, any read requests after the first should
1647 * have the end_of_chain boolean set to true.
1650 smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms,
1651 unsigned int remaining_bytes, int request_type)
1654 struct smb2_read_req *req = NULL;
1656 rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req);
1659 if (io_parms->tcon->ses->server == NULL)
1660 return -ECONNABORTED;
1662 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1664 req->PersistentFileId = io_parms->persistent_fid;
1665 req->VolatileFileId = io_parms->volatile_fid;
1666 req->ReadChannelInfoOffset = 0; /* reserved */
1667 req->ReadChannelInfoLength = 0; /* reserved */
1668 req->Channel = 0; /* reserved */
1669 req->MinimumCount = 0;
1670 req->Length = cpu_to_le32(io_parms->length);
1671 req->Offset = cpu_to_le64(io_parms->offset);
1673 if (request_type & CHAINED_REQUEST) {
1674 if (!(request_type & END_OF_CHAIN)) {
1675 /* 4 for rfc1002 length field */
1676 req->hdr.NextCommand =
1677 cpu_to_le32(get_rfc1002_length(req) + 4);
1678 } else /* END_OF_CHAIN */
1679 req->hdr.NextCommand = 0;
1680 if (request_type & RELATED_REQUEST) {
1681 req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
1683 * Related requests use info from previous read request
1686 req->hdr.SessionId = 0xFFFFFFFF;
1687 req->hdr.TreeId = 0xFFFFFFFF;
1688 req->PersistentFileId = 0xFFFFFFFF;
1689 req->VolatileFileId = 0xFFFFFFFF;
1692 if (remaining_bytes > io_parms->length)
1693 req->RemainingBytes = cpu_to_le32(remaining_bytes);
1695 req->RemainingBytes = 0;
1697 iov[0].iov_base = (char *)req;
1698 /* 4 for rfc1002 length field */
1699 iov[0].iov_len = get_rfc1002_length(req) + 4;
1704 smb2_readv_callback(struct mid_q_entry *mid)
1706 struct cifs_readdata *rdata = mid->callback_data;
1707 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
1708 struct TCP_Server_Info *server = tcon->ses->server;
1709 struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base;
1710 unsigned int credits_received = 1;
1711 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
1713 .rq_pages = rdata->pages,
1714 .rq_npages = rdata->nr_pages,
1715 .rq_pagesz = rdata->pagesz,
1716 .rq_tailsz = rdata->tailsz };
1718 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1719 __func__, mid->mid, mid->mid_state, rdata->result,
1722 switch (mid->mid_state) {
1723 case MID_RESPONSE_RECEIVED:
1724 credits_received = le16_to_cpu(buf->CreditRequest);
1725 /* result already set, check signature */
1729 rc = smb2_verify_signature(&rqst, server);
1731 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
1734 /* FIXME: should this be counted toward the initiating task? */
1735 task_io_account_read(rdata->bytes);
1736 cifs_stats_bytes_read(tcon, rdata->bytes);
1738 case MID_REQUEST_SUBMITTED:
1739 case MID_RETRY_NEEDED:
1740 rdata->result = -EAGAIN;
1743 if (rdata->result != -ENODATA)
1744 rdata->result = -EIO;
1748 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
1750 queue_work(cifsiod_wq, &rdata->work);
1751 DeleteMidQEntry(mid);
1752 add_credits(server, credits_received, 0);
1755 /* smb2_async_readv - send an async write, and set up mid to handle result */
1757 smb2_async_readv(struct cifs_readdata *rdata)
1760 struct smb2_hdr *buf;
1761 struct cifs_io_parms io_parms;
1762 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
1765 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
1766 __func__, rdata->offset, rdata->bytes);
1768 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
1769 io_parms.offset = rdata->offset;
1770 io_parms.length = rdata->bytes;
1771 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
1772 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
1773 io_parms.pid = rdata->pid;
1774 rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0);
1778 buf = (struct smb2_hdr *)rdata->iov.iov_base;
1779 /* 4 for rfc1002 length field */
1780 rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4;
1782 kref_get(&rdata->refcount);
1783 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
1784 cifs_readv_receive, smb2_readv_callback,
1787 kref_put(&rdata->refcount, cifs_readdata_release);
1788 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
1791 cifs_small_buf_release(buf);
1796 SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
1797 unsigned int *nbytes, char **buf, int *buf_type)
1799 int resp_buftype, rc = -EACCES;
1800 struct smb2_read_rsp *rsp = NULL;
1804 rc = smb2_new_read_req(iov, io_parms, 0, 0);
1808 rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1,
1809 &resp_buftype, CIFS_LOG_ERROR);
1811 rsp = (struct smb2_read_rsp *)iov[0].iov_base;
1813 if (rsp->hdr.Status == STATUS_END_OF_FILE) {
1814 free_rsp_buf(resp_buftype, iov[0].iov_base);
1819 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
1820 cifs_dbg(VFS, "Send error in read = %d\n", rc);
1822 *nbytes = le32_to_cpu(rsp->DataLength);
1823 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
1824 (*nbytes > io_parms->length)) {
1825 cifs_dbg(FYI, "bad length %d for count %d\n",
1826 *nbytes, io_parms->length);
1833 memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset,
1835 free_rsp_buf(resp_buftype, iov[0].iov_base);
1836 } else if (resp_buftype != CIFS_NO_BUFFER) {
1837 *buf = iov[0].iov_base;
1838 if (resp_buftype == CIFS_SMALL_BUFFER)
1839 *buf_type = CIFS_SMALL_BUFFER;
1840 else if (resp_buftype == CIFS_LARGE_BUFFER)
1841 *buf_type = CIFS_LARGE_BUFFER;
1847 * Check the mid_state and signature on received buffer (if any), and queue the
1848 * workqueue completion task.
1851 smb2_writev_callback(struct mid_q_entry *mid)
1853 struct cifs_writedata *wdata = mid->callback_data;
1854 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1855 unsigned int written;
1856 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
1857 unsigned int credits_received = 1;
1859 switch (mid->mid_state) {
1860 case MID_RESPONSE_RECEIVED:
1861 credits_received = le16_to_cpu(rsp->hdr.CreditRequest);
1862 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
1863 if (wdata->result != 0)
1866 written = le32_to_cpu(rsp->DataLength);
1868 * Mask off high 16 bits when bytes written as returned
1869 * by the server is greater than bytes requested by the
1870 * client. OS/2 servers are known to set incorrect
1873 if (written > wdata->bytes)
1876 if (written < wdata->bytes)
1877 wdata->result = -ENOSPC;
1879 wdata->bytes = written;
1881 case MID_REQUEST_SUBMITTED:
1882 case MID_RETRY_NEEDED:
1883 wdata->result = -EAGAIN;
1886 wdata->result = -EIO;
1891 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1893 queue_work(cifsiod_wq, &wdata->work);
1894 DeleteMidQEntry(mid);
1895 add_credits(tcon->ses->server, credits_received, 0);
1898 /* smb2_async_writev - send an async write, and set up mid to handle result */
1900 smb2_async_writev(struct cifs_writedata *wdata,
1901 void (*release)(struct kref *kref))
1904 struct smb2_write_req *req = NULL;
1905 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1907 struct smb_rqst rqst;
1909 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
1911 goto async_writev_out;
1913 req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid);
1915 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
1916 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
1917 req->WriteChannelInfoOffset = 0;
1918 req->WriteChannelInfoLength = 0;
1920 req->Offset = cpu_to_le64(wdata->offset);
1921 /* 4 for rfc1002 length field */
1922 req->DataOffset = cpu_to_le16(
1923 offsetof(struct smb2_write_req, Buffer) - 4);
1924 req->RemainingBytes = 0;
1926 /* 4 for rfc1002 length field and 1 for Buffer */
1927 iov.iov_len = get_rfc1002_length(req) + 4 - 1;
1932 rqst.rq_pages = wdata->pages;
1933 rqst.rq_npages = wdata->nr_pages;
1934 rqst.rq_pagesz = wdata->pagesz;
1935 rqst.rq_tailsz = wdata->tailsz;
1937 cifs_dbg(FYI, "async write at %llu %u bytes\n",
1938 wdata->offset, wdata->bytes);
1940 req->Length = cpu_to_le32(wdata->bytes);
1942 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
1944 kref_get(&wdata->refcount);
1945 rc = cifs_call_async(tcon->ses->server, &rqst, NULL,
1946 smb2_writev_callback, wdata, 0);
1949 kref_put(&wdata->refcount, release);
1950 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1954 cifs_small_buf_release(req);
1959 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1960 * The length field from io_parms must be at least 1 and indicates a number of
1961 * elements with data to write that begins with position 1 in iov array. All
1962 * data length is specified by count.
1965 SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
1966 unsigned int *nbytes, struct kvec *iov, int n_vec)
1969 struct smb2_write_req *req = NULL;
1970 struct smb2_write_rsp *rsp = NULL;
1977 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
1981 if (io_parms->tcon->ses->server == NULL)
1982 return -ECONNABORTED;
1984 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1986 req->PersistentFileId = io_parms->persistent_fid;
1987 req->VolatileFileId = io_parms->volatile_fid;
1988 req->WriteChannelInfoOffset = 0;
1989 req->WriteChannelInfoLength = 0;
1991 req->Length = cpu_to_le32(io_parms->length);
1992 req->Offset = cpu_to_le64(io_parms->offset);
1993 /* 4 for rfc1002 length field */
1994 req->DataOffset = cpu_to_le16(
1995 offsetof(struct smb2_write_req, Buffer) - 4);
1996 req->RemainingBytes = 0;
1998 iov[0].iov_base = (char *)req;
1999 /* 4 for rfc1002 length field and 1 for Buffer */
2000 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2002 /* length of entire message including data to be written */
2003 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
2005 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
2007 rsp = (struct smb2_write_rsp *)iov[0].iov_base;
2010 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
2011 cifs_dbg(VFS, "Send error in write = %d\n", rc);
2013 *nbytes = le32_to_cpu(rsp->DataLength);
2015 free_rsp_buf(resp_buftype, rsp);
2020 num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
2023 unsigned int entrycount = 0;
2024 unsigned int next_offset = 0;
2025 FILE_DIRECTORY_INFO *entryptr;
2027 if (bufstart == NULL)
2030 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
2033 entryptr = (FILE_DIRECTORY_INFO *)
2034 ((char *)entryptr + next_offset);
2036 if ((char *)entryptr + size > end_of_buf) {
2037 cifs_dbg(VFS, "malformed search entry would overflow\n");
2041 len = le32_to_cpu(entryptr->FileNameLength);
2042 if ((char *)entryptr + len + size > end_of_buf) {
2043 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
2048 *lastentry = (char *)entryptr;
2051 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
2063 SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
2064 u64 persistent_fid, u64 volatile_fid, int index,
2065 struct cifs_search_info *srch_inf)
2067 struct smb2_query_directory_req *req;
2068 struct smb2_query_directory_rsp *rsp = NULL;
2073 unsigned char *bufptr;
2074 struct TCP_Server_Info *server;
2075 struct cifs_ses *ses = tcon->ses;
2076 __le16 asteriks = cpu_to_le16('*');
2078 unsigned int output_size = CIFSMaxBufSize;
2079 size_t info_buf_size;
2081 if (ses && (ses->server))
2082 server = ses->server;
2086 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
2090 switch (srch_inf->info_level) {
2091 case SMB_FIND_FILE_DIRECTORY_INFO:
2092 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
2093 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
2095 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
2096 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
2097 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
2100 cifs_dbg(VFS, "info level %u isn't supported\n",
2101 srch_inf->info_level);
2106 req->FileIndex = cpu_to_le32(index);
2107 req->PersistentFileId = persistent_fid;
2108 req->VolatileFileId = volatile_fid;
2111 bufptr = req->Buffer;
2112 memcpy(bufptr, &asteriks, len);
2114 req->FileNameOffset =
2115 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
2116 req->FileNameLength = cpu_to_le16(len);
2118 * BB could be 30 bytes or so longer if we used SMB2 specific
2119 * buffer lengths, but this is safe and close enough.
2121 output_size = min_t(unsigned int, output_size, server->maxBuf);
2122 output_size = min_t(unsigned int, output_size, 2 << 15);
2123 req->OutputBufferLength = cpu_to_le32(output_size);
2125 iov[0].iov_base = (char *)req;
2126 /* 4 for RFC1001 length and 1 for Buffer */
2127 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2129 iov[1].iov_base = (char *)(req->Buffer);
2130 iov[1].iov_len = len;
2132 inc_rfc1001_len(req, len - 1 /* Buffer */);
2134 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
2135 rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base;
2138 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
2142 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2143 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2148 srch_inf->unicode = true;
2150 if (srch_inf->ntwrk_buf_start) {
2151 if (srch_inf->smallBuf)
2152 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
2154 cifs_buf_release(srch_inf->ntwrk_buf_start);
2156 srch_inf->ntwrk_buf_start = (char *)rsp;
2157 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
2158 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
2159 /* 4 for rfc1002 length field */
2160 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
2161 srch_inf->entries_in_buffer =
2162 num_entries(srch_inf->srch_entries_start, end_of_smb,
2163 &srch_inf->last_entry, info_buf_size);
2164 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
2165 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
2166 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
2167 srch_inf->srch_entries_start, srch_inf->last_entry);
2168 if (resp_buftype == CIFS_LARGE_BUFFER)
2169 srch_inf->smallBuf = false;
2170 else if (resp_buftype == CIFS_SMALL_BUFFER)
2171 srch_inf->smallBuf = true;
2173 cifs_dbg(VFS, "illegal search buffer type\n");
2175 if (rsp->hdr.Status == STATUS_NO_MORE_FILES)
2176 srch_inf->endOfSearch = 1;
2178 srch_inf->endOfSearch = 0;
2183 free_rsp_buf(resp_buftype, rsp);
2188 send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2189 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
2190 unsigned int num, void **data, unsigned int *size)
2192 struct smb2_set_info_req *req;
2193 struct smb2_set_info_rsp *rsp = NULL;
2198 struct TCP_Server_Info *server;
2199 struct cifs_ses *ses = tcon->ses;
2201 if (ses && (ses->server))
2202 server = ses->server;
2209 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
2213 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
2219 req->hdr.ProcessId = cpu_to_le32(pid);
2221 req->InfoType = SMB2_O_INFO_FILE;
2222 req->FileInfoClass = info_class;
2223 req->PersistentFileId = persistent_fid;
2224 req->VolatileFileId = volatile_fid;
2226 /* 4 for RFC1001 length and 1 for Buffer */
2228 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
2229 req->BufferLength = cpu_to_le32(*size);
2231 inc_rfc1001_len(req, *size - 1 /* Buffer */);
2233 memcpy(req->Buffer, *data, *size);
2235 iov[0].iov_base = (char *)req;
2236 /* 4 for RFC1001 length */
2237 iov[0].iov_len = get_rfc1002_length(req) + 4;
2239 for (i = 1; i < num; i++) {
2240 inc_rfc1001_len(req, size[i]);
2241 le32_add_cpu(&req->BufferLength, size[i]);
2242 iov[i].iov_base = (char *)data[i];
2243 iov[i].iov_len = size[i];
2246 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0);
2247 rsp = (struct smb2_set_info_rsp *)iov[0].iov_base;
2250 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
2252 free_rsp_buf(resp_buftype, rsp);
2258 SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
2259 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2261 struct smb2_file_rename_info info;
2263 unsigned int size[2];
2265 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2267 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2271 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
2272 /* 0 = fail if target already exists */
2273 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2274 info.FileNameLength = cpu_to_le32(len);
2277 size[0] = sizeof(struct smb2_file_rename_info);
2279 data[1] = target_file;
2280 size[1] = len + 2 /* null */;
2282 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
2283 current->tgid, FILE_RENAME_INFORMATION, 2, data,
2290 SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
2291 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2293 struct smb2_file_link_info info;
2295 unsigned int size[2];
2297 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2299 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2303 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
2304 /* 0 = fail if link already exists */
2305 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2306 info.FileNameLength = cpu_to_le32(len);
2309 size[0] = sizeof(struct smb2_file_link_info);
2311 data[1] = target_file;
2312 size[1] = len + 2 /* null */;
2314 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
2315 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
2321 SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2322 u64 volatile_fid, u32 pid, __le64 *eof)
2324 struct smb2_file_eof_info info;
2328 info.EndOfFile = *eof;
2331 size = sizeof(struct smb2_file_eof_info);
2333 return send_set_info(xid, tcon, persistent_fid, volatile_fid, pid,
2334 FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
2338 SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2339 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
2342 size = sizeof(FILE_BASIC_INFO);
2343 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2344 current->tgid, FILE_BASIC_INFORMATION, 1,
2345 (void **)&buf, &size);
2349 SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
2350 const u64 persistent_fid, const u64 volatile_fid,
2354 struct smb2_oplock_break *req = NULL;
2356 cifs_dbg(FYI, "SMB2_oplock_break\n");
2357 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2362 req->VolatileFid = volatile_fid;
2363 req->PersistentFid = persistent_fid;
2364 req->OplockLevel = oplock_level;
2365 req->hdr.CreditRequest = cpu_to_le16(1);
2367 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2368 /* SMB2 buffer freed by function above */
2371 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2372 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
2379 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
2380 struct kstatfs *kst)
2382 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
2383 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
2384 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
2385 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
2386 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
2391 build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
2392 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
2395 struct smb2_query_info_req *req;
2397 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
2399 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
2402 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2406 req->InfoType = SMB2_O_INFO_FILESYSTEM;
2407 req->FileInfoClass = level;
2408 req->PersistentFileId = persistent_fid;
2409 req->VolatileFileId = volatile_fid;
2410 /* 4 for rfc1002 length field and 1 for pad */
2411 req->InputBufferOffset =
2412 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
2413 req->OutputBufferLength = cpu_to_le32(
2414 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
2416 iov->iov_base = (char *)req;
2417 /* 4 for rfc1002 length field */
2418 iov->iov_len = get_rfc1002_length(req) + 4;
2423 SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
2424 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
2426 struct smb2_query_info_rsp *rsp = NULL;
2430 struct cifs_ses *ses = tcon->ses;
2431 struct smb2_fs_full_size_info *info = NULL;
2433 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
2434 sizeof(struct smb2_fs_full_size_info),
2435 persistent_fid, volatile_fid);
2439 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2441 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2444 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2446 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
2447 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
2448 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2449 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2450 sizeof(struct smb2_fs_full_size_info));
2452 copy_fs_info_to_kstatfs(info, fsdata);
2455 free_rsp_buf(resp_buftype, iov.iov_base);
2460 SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2461 u64 persistent_fid, u64 volatile_fid, int level)
2463 struct smb2_query_info_rsp *rsp = NULL;
2466 int resp_buftype, max_len, min_len;
2467 struct cifs_ses *ses = tcon->ses;
2468 unsigned int rsp_len, offset;
2470 if (level == FS_DEVICE_INFORMATION) {
2471 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2472 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2473 } else if (level == FS_ATTRIBUTE_INFORMATION) {
2474 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
2475 min_len = MIN_FS_ATTR_INFO_SIZE;
2476 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
2477 max_len = sizeof(struct smb3_fs_ss_info);
2478 min_len = sizeof(struct smb3_fs_ss_info);
2480 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2484 rc = build_qfs_info_req(&iov, tcon, level, max_len,
2485 persistent_fid, volatile_fid);
2489 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2491 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2494 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2496 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
2497 offset = le16_to_cpu(rsp->OutputBufferOffset);
2498 rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
2502 if (level == FS_ATTRIBUTE_INFORMATION)
2503 memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
2504 + (char *)&rsp->hdr, min_t(unsigned int,
2506 else if (level == FS_DEVICE_INFORMATION)
2507 memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
2508 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
2509 else if (level == FS_SECTOR_SIZE_INFORMATION) {
2510 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
2511 (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
2512 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
2513 tcon->perf_sector_size =
2514 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
2518 free_rsp_buf(resp_buftype, iov.iov_base);
2523 smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
2524 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2525 const __u32 num_lock, struct smb2_lock_element *buf)
2528 struct smb2_lock_req *req = NULL;
2533 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
2535 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
2539 req->hdr.ProcessId = cpu_to_le32(pid);
2540 req->LockCount = cpu_to_le16(num_lock);
2542 req->PersistentFileId = persist_fid;
2543 req->VolatileFileId = volatile_fid;
2545 count = num_lock * sizeof(struct smb2_lock_element);
2546 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
2548 iov[0].iov_base = (char *)req;
2549 /* 4 for rfc1002 length field and count for all locks */
2550 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
2551 iov[1].iov_base = (char *)buf;
2552 iov[1].iov_len = count;
2554 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
2555 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP);
2557 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
2558 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
2565 SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
2566 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2567 const __u64 length, const __u64 offset, const __u32 lock_flags,
2570 struct smb2_lock_element lock;
2572 lock.Offset = cpu_to_le64(offset);
2573 lock.Length = cpu_to_le64(length);
2574 lock.Flags = cpu_to_le32(lock_flags);
2575 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
2576 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
2578 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
2582 SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
2583 __u8 *lease_key, const __le32 lease_state)
2586 struct smb2_lease_ack *req = NULL;
2588 cifs_dbg(FYI, "SMB2_lease_break\n");
2589 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2594 req->hdr.CreditRequest = cpu_to_le16(1);
2595 req->StructureSize = cpu_to_le16(36);
2596 inc_rfc1001_len(req, 12);
2598 memcpy(req->LeaseKey, lease_key, 16);
2599 req->LeaseState = lease_state;
2601 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2602 /* SMB2 buffer freed by function above */
2605 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2606 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);