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, server->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, tcon->ses->server->client_guid,
482 SMB2_CLIENT_GUID_SIZE);
485 vneg_inbuf.SecurityMode =
486 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
487 else if (global_secflags & CIFSSEC_MAY_SIGN)
488 vneg_inbuf.SecurityMode =
489 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
491 vneg_inbuf.SecurityMode = 0;
493 vneg_inbuf.DialectCount = cpu_to_le16(1);
494 vneg_inbuf.Dialects[0] =
495 cpu_to_le16(tcon->ses->server->vals->protocol_id);
497 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
498 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
499 (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
500 (char **)&pneg_rsp, &rsplen);
503 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
507 if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
508 cifs_dbg(VFS, "invalid size of protocol negotiate response\n");
512 /* check validate negotiate info response matches what we got earlier */
513 if (pneg_rsp->Dialect !=
514 cpu_to_le16(tcon->ses->server->vals->protocol_id))
517 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
520 /* do not validate server guid because not saved at negprot time yet */
522 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
523 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
526 /* validate negotiate successful */
527 cifs_dbg(FYI, "validate negotiate info successful\n");
531 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
536 SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
537 const struct nls_table *nls_cp)
539 struct smb2_sess_setup_req *req;
540 struct smb2_sess_setup_rsp *rsp = NULL;
544 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
545 struct TCP_Server_Info *server = ses->server;
548 char *ntlmssp_blob = NULL;
549 bool use_spnego = false; /* else use raw ntlmssp */
551 cifs_dbg(FYI, "Session Setup\n");
554 WARN(1, "%s: server is NULL!\n", __func__);
559 * If we are here due to reconnect, free per-smb session key
560 * in case signing was required.
562 kfree(ses->auth_key.response);
563 ses->auth_key.response = NULL;
566 * If memory allocation is successful, caller of this function
569 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
572 ses->ntlmssp->sesskey_per_smbsess = true;
574 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
575 ses->sectype = RawNTLMSSP;
577 ssetup_ntlmssp_authenticate:
578 if (phase == NtLmChallenge)
579 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
581 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
585 req->hdr.SessionId = 0; /* First session, not a reauthenticate */
586 req->VcNumber = 0; /* MBZ */
587 /* to enable echos and oplocks */
588 req->hdr.CreditRequest = cpu_to_le16(3);
590 /* only one of SMB2 signing flags may be set in SMB2 request */
592 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
593 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
594 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
596 req->SecurityMode = 0;
598 req->Capabilities = 0;
599 req->Channel = 0; /* MBZ */
601 iov[0].iov_base = (char *)req;
602 /* 4 for rfc1002 length field and 1 for pad */
603 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
604 if (phase == NtLmNegotiate) {
605 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
607 if (ntlmssp_blob == NULL) {
611 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
613 /* blob_length = build_spnego_ntlmssp_blob(
615 sizeof(struct _NEGOTIATE_MESSAGE),
617 /* BB eventually need to add this */
618 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
623 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
624 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
625 security_blob = ntlmssp_blob;
627 } else if (phase == NtLmAuthenticate) {
628 req->hdr.SessionId = ses->Suid;
629 ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500,
631 if (ntlmssp_blob == NULL) {
635 rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses,
638 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n",
640 goto ssetup_exit; /* BB double check error handling */
643 /* blob_length = build_spnego_ntlmssp_blob(
647 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
652 security_blob = ntlmssp_blob;
655 cifs_dbg(VFS, "illegal ntlmssp phase\n");
660 /* Testing shows that buffer offset must be at location of Buffer[0] */
661 req->SecurityBufferOffset =
662 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
663 1 /* pad */ - 4 /* rfc1001 len */);
664 req->SecurityBufferLength = cpu_to_le16(blob_length);
665 iov[1].iov_base = security_blob;
666 iov[1].iov_len = blob_length;
668 inc_rfc1001_len(req, blob_length - 1 /* pad */);
670 /* BB add code to build os and lm fields */
672 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype,
673 CIFS_LOG_ERROR | CIFS_NEG_OP);
675 kfree(security_blob);
676 rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base;
677 if (resp_buftype != CIFS_NO_BUFFER &&
678 rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) {
679 if (phase != NtLmNegotiate) {
680 cifs_dbg(VFS, "Unexpected more processing error\n");
683 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
684 le16_to_cpu(rsp->SecurityBufferOffset)) {
685 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
686 le16_to_cpu(rsp->SecurityBufferOffset));
691 /* NTLMSSP Negotiate sent now processing challenge (response) */
692 phase = NtLmChallenge; /* process ntlmssp challenge */
693 rc = 0; /* MORE_PROCESSING is not an error here but expected */
694 ses->Suid = rsp->hdr.SessionId;
695 rc = decode_ntlmssp_challenge(rsp->Buffer,
696 le16_to_cpu(rsp->SecurityBufferLength), ses);
700 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
701 * but at least the raw NTLMSSP case works.
704 * No tcon so can't do
705 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
710 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
711 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
712 cifs_dbg(VFS, "SMB3 encryption not supported yet\n");
714 free_rsp_buf(resp_buftype, rsp);
716 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
717 if ((phase == NtLmChallenge) && (rc == 0))
718 goto ssetup_ntlmssp_authenticate;
721 mutex_lock(&server->srv_mutex);
722 if (server->sign && server->ops->generate_signingkey) {
723 rc = server->ops->generate_signingkey(ses);
724 kfree(ses->auth_key.response);
725 ses->auth_key.response = NULL;
728 "SMB3 session key generation failed\n");
729 mutex_unlock(&server->srv_mutex);
733 if (!server->session_estab) {
734 server->sequence_number = 0x2;
735 server->session_estab = true;
737 mutex_unlock(&server->srv_mutex);
739 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
740 spin_lock(&GlobalMid_Lock);
741 ses->status = CifsGood;
742 ses->need_reconnect = false;
743 spin_unlock(&GlobalMid_Lock);
748 kfree(ses->auth_key.response);
749 ses->auth_key.response = NULL;
757 SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
759 struct smb2_logoff_req *req; /* response is also trivial struct */
761 struct TCP_Server_Info *server;
763 cifs_dbg(FYI, "disconnect session %p\n", ses);
765 if (ses && (ses->server))
766 server = ses->server;
770 /* no need to send SMB logoff if uid already closed due to reconnect */
771 if (ses->need_reconnect)
772 goto smb2_session_already_dead;
774 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
778 /* since no tcon, smb2_init can not do this, so do here */
779 req->hdr.SessionId = ses->Suid;
781 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
783 rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0);
785 * No tcon so can't do
786 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
789 smb2_session_already_dead:
793 static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
795 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
798 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
800 /* These are similar values to what Windows uses */
801 static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
803 tcon->max_chunks = 256;
804 tcon->max_bytes_chunk = 1048576;
805 tcon->max_bytes_copy = 16777216;
809 SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
810 struct cifs_tcon *tcon, const struct nls_table *cp)
812 struct smb2_tree_connect_req *req;
813 struct smb2_tree_connect_rsp *rsp = NULL;
818 struct TCP_Server_Info *server;
819 __le16 *unc_path = NULL;
821 cifs_dbg(FYI, "TCON\n");
823 if ((ses->server) && tree)
824 server = ses->server;
828 if (tcon && tcon->bad_network_name)
831 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
832 if (unc_path == NULL)
835 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
837 if (unc_path_len < 2) {
842 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
849 /* since no tcon, smb2_init can not do this, so do here */
850 req->hdr.SessionId = ses->Suid;
851 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
852 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
855 iov[0].iov_base = (char *)req;
856 /* 4 for rfc1002 length field and 1 for pad */
857 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
859 /* Testing shows that buffer offset must be at location of Buffer[0] */
860 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
861 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
862 req->PathLength = cpu_to_le16(unc_path_len - 2);
863 iov[1].iov_base = unc_path;
864 iov[1].iov_len = unc_path_len;
866 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
868 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
869 rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base;
873 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
874 tcon->need_reconnect = true;
876 goto tcon_error_exit;
880 ses->ipc_tid = rsp->hdr.TreeId;
884 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
885 cifs_dbg(FYI, "connection to disk share\n");
886 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
888 cifs_dbg(FYI, "connection to pipe share\n");
889 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
891 cifs_dbg(FYI, "connection to printer\n");
893 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
895 goto tcon_error_exit;
898 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
899 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
900 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
901 tcon->tidStatus = CifsGood;
902 tcon->need_reconnect = false;
903 tcon->tid = rsp->hdr.TreeId;
904 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
906 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
907 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
908 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
909 init_copy_chunk_defaults(tcon);
910 if (tcon->ses->server->ops->validate_negotiate)
911 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
913 free_rsp_buf(resp_buftype, rsp);
918 if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) {
919 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
920 tcon->bad_network_name = true;
926 SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
928 struct smb2_tree_disconnect_req *req; /* response is trivial */
930 struct TCP_Server_Info *server;
931 struct cifs_ses *ses = tcon->ses;
933 cifs_dbg(FYI, "Tree Disconnect\n");
935 if (ses && (ses->server))
936 server = ses->server;
940 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
943 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
947 rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0);
949 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
955 static struct create_durable *
956 create_durable_buf(void)
958 struct create_durable *buf;
960 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
964 buf->ccontext.DataOffset = cpu_to_le16(offsetof
965 (struct create_durable, Data));
966 buf->ccontext.DataLength = cpu_to_le32(16);
967 buf->ccontext.NameOffset = cpu_to_le16(offsetof
968 (struct create_durable, Name));
969 buf->ccontext.NameLength = cpu_to_le16(4);
977 static struct create_durable *
978 create_reconnect_durable_buf(struct cifs_fid *fid)
980 struct create_durable *buf;
982 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
986 buf->ccontext.DataOffset = cpu_to_le16(offsetof
987 (struct create_durable, Data));
988 buf->ccontext.DataLength = cpu_to_le32(16);
989 buf->ccontext.NameOffset = cpu_to_le16(offsetof
990 (struct create_durable, Name));
991 buf->ccontext.NameLength = cpu_to_le16(4);
992 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
993 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
1002 parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
1003 unsigned int *epoch)
1006 struct create_context *cc;
1007 unsigned int next = 0;
1010 data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
1011 cc = (struct create_context *)data_offset;
1013 cc = (struct create_context *)((char *)cc + next);
1014 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
1015 if (le16_to_cpu(cc->NameLength) != 4 ||
1016 strncmp(name, "RqLs", 4)) {
1017 next = le32_to_cpu(cc->Next);
1020 return server->ops->parse_lease_buf(cc, epoch);
1021 } while (next != 0);
1027 add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1028 unsigned int *num_iovec, __u8 *oplock)
1030 struct smb2_create_req *req = iov[0].iov_base;
1031 unsigned int num = *num_iovec;
1033 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
1034 if (iov[num].iov_base == NULL)
1036 iov[num].iov_len = server->vals->create_lease_size;
1037 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1038 if (!req->CreateContextsOffset)
1039 req->CreateContextsOffset = cpu_to_le32(
1040 sizeof(struct smb2_create_req) - 4 +
1041 iov[num - 1].iov_len);
1042 le32_add_cpu(&req->CreateContextsLength,
1043 server->vals->create_lease_size);
1044 inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
1045 *num_iovec = num + 1;
1050 add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1051 struct cifs_open_parms *oparms)
1053 struct smb2_create_req *req = iov[0].iov_base;
1054 unsigned int num = *num_iovec;
1056 if (oparms->reconnect) {
1057 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1058 /* indicate that we don't need to relock the file */
1059 oparms->reconnect = false;
1061 iov[num].iov_base = create_durable_buf();
1062 if (iov[num].iov_base == NULL)
1064 iov[num].iov_len = sizeof(struct create_durable);
1065 if (!req->CreateContextsOffset)
1066 req->CreateContextsOffset =
1067 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1069 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
1070 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
1071 *num_iovec = num + 1;
1076 SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
1077 __u8 *oplock, struct smb2_file_all_info *buf,
1078 struct smb2_err_rsp **err_buf)
1080 struct smb2_create_req *req;
1081 struct smb2_create_rsp *rsp;
1082 struct TCP_Server_Info *server;
1083 struct cifs_tcon *tcon = oparms->tcon;
1084 struct cifs_ses *ses = tcon->ses;
1088 __le16 *copy_path = NULL;
1091 unsigned int num_iovecs = 2;
1092 __u32 file_attributes = 0;
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);
1161 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1162 /* need to set Next field of lease context if we request it */
1163 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
1164 struct create_context *ccontext =
1165 (struct create_context *)iov[num_iovecs-1].iov_base;
1167 cpu_to_le32(server->vals->create_lease_size);
1169 rc = add_durable_context(iov, &num_iovecs, oparms);
1171 cifs_small_buf_release(req);
1173 kfree(iov[num_iovecs-1].iov_base);
1178 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1179 rsp = (struct smb2_create_rsp *)iov[0].iov_base;
1182 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
1184 *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
1189 oparms->fid->persistent_fid = rsp->PersistentFileId;
1190 oparms->fid->volatile_fid = rsp->VolatileFileId;
1193 memcpy(buf, &rsp->CreationTime, 32);
1194 buf->AllocationSize = rsp->AllocationSize;
1195 buf->EndOfFile = rsp->EndofFile;
1196 buf->Attributes = rsp->FileAttributes;
1197 buf->NumberOfLinks = cpu_to_le32(1);
1198 buf->DeletePending = 0;
1201 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
1202 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
1204 *oplock = rsp->OplockLevel;
1207 free_rsp_buf(resp_buftype, rsp);
1212 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1215 SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1216 u64 volatile_fid, u32 opcode, bool is_fsctl, char *in_data,
1217 u32 indatalen, char **out_data, u32 *plen /* returned data len */)
1219 struct smb2_ioctl_req *req;
1220 struct smb2_ioctl_rsp *rsp;
1221 struct TCP_Server_Info *server;
1222 struct cifs_ses *ses = tcon->ses;
1228 cifs_dbg(FYI, "SMB2 IOCTL\n");
1231 /* zero out returned data len, in case of error */
1235 if (ses && (ses->server))
1236 server = ses->server;
1240 rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req);
1244 req->CtlCode = cpu_to_le32(opcode);
1245 req->PersistentFileId = persistent_fid;
1246 req->VolatileFileId = volatile_fid;
1249 req->InputCount = cpu_to_le32(indatalen);
1250 /* do not set InputOffset if no input data */
1252 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4);
1253 iov[1].iov_base = in_data;
1254 iov[1].iov_len = indatalen;
1259 req->OutputOffset = 0;
1260 req->OutputCount = 0; /* MBZ */
1263 * Could increase MaxOutputResponse, but that would require more
1264 * than one credit. Windows typically sets this smaller, but for some
1265 * ioctls it may be useful to allow server to send more. No point
1266 * limiting what the server can send as long as fits in one credit
1268 req->MaxOutputResponse = cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1271 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
1275 iov[0].iov_base = (char *)req;
1278 * If no input data, the size of ioctl struct in
1279 * protocol spec still includes a 1 byte data buffer,
1280 * but if input data passed to ioctl, we do not
1281 * want to double count this, so we do not send
1282 * the dummy one byte of data in iovec[0] if sending
1283 * input data (in iovec[1]). We also must add 4 bytes
1284 * in first iovec to allow for rfc1002 length field.
1288 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1289 inc_rfc1001_len(req, indatalen - 1);
1291 iov[0].iov_len = get_rfc1002_length(req) + 4;
1294 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1295 rsp = (struct smb2_ioctl_rsp *)iov[0].iov_base;
1297 if ((rc != 0) && (rc != -EINVAL)) {
1299 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1301 } else if (rc == -EINVAL) {
1302 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
1303 (opcode != FSCTL_SRV_COPYCHUNK)) {
1305 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1310 /* check if caller wants to look at return data or just return rc */
1311 if ((plen == NULL) || (out_data == NULL))
1314 *plen = le32_to_cpu(rsp->OutputCount);
1316 /* We check for obvious errors in the output buffer length and offset */
1318 goto ioctl_exit; /* server returned no data */
1319 else if (*plen > 0xFF00) {
1320 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
1326 if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
1327 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
1328 le32_to_cpu(rsp->OutputOffset));
1334 *out_data = kmalloc(*plen, GFP_KERNEL);
1335 if (*out_data == NULL) {
1340 memcpy(*out_data, rsp->hdr.ProtocolId + le32_to_cpu(rsp->OutputOffset),
1343 free_rsp_buf(resp_buftype, rsp);
1348 * Individual callers to ioctl worker function follow
1352 SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1353 u64 persistent_fid, u64 volatile_fid)
1356 struct compress_ioctl fsctl_input;
1357 char *ret_data = NULL;
1359 fsctl_input.CompressionState =
1360 __constant_cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
1362 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1363 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
1364 (char *)&fsctl_input /* data input */,
1365 2 /* in data len */, &ret_data /* out data */, NULL);
1367 cifs_dbg(FYI, "set compression rc %d\n", rc);
1373 SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1374 u64 persistent_fid, u64 volatile_fid)
1376 struct smb2_close_req *req;
1377 struct smb2_close_rsp *rsp;
1378 struct TCP_Server_Info *server;
1379 struct cifs_ses *ses = tcon->ses;
1384 cifs_dbg(FYI, "Close\n");
1386 if (ses && (ses->server))
1387 server = ses->server;
1391 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1395 req->PersistentFileId = persistent_fid;
1396 req->VolatileFileId = volatile_fid;
1398 iov[0].iov_base = (char *)req;
1399 /* 4 for rfc1002 length field */
1400 iov[0].iov_len = get_rfc1002_length(req) + 4;
1402 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1403 rsp = (struct smb2_close_rsp *)iov[0].iov_base;
1407 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
1411 /* BB FIXME - decode close response, update inode for caching */
1414 free_rsp_buf(resp_buftype, rsp);
1419 validate_buf(unsigned int offset, unsigned int buffer_length,
1420 struct smb2_hdr *hdr, unsigned int min_buf_size)
1423 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
1424 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
1425 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1426 char *end_of_buf = begin_of_buf + buffer_length;
1429 if (buffer_length < min_buf_size) {
1430 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
1431 buffer_length, min_buf_size);
1435 /* check if beyond RFC1001 maximum length */
1436 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
1437 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
1438 buffer_length, smb_len);
1442 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
1443 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
1451 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1452 * Caller must free buffer.
1455 validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
1456 struct smb2_hdr *hdr, unsigned int minbufsize,
1460 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1466 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
1470 memcpy(data, begin_of_buf, buffer_length);
1476 query_info(const unsigned int xid, struct cifs_tcon *tcon,
1477 u64 persistent_fid, u64 volatile_fid, u8 info_class,
1478 size_t output_len, size_t min_len, void *data)
1480 struct smb2_query_info_req *req;
1481 struct smb2_query_info_rsp *rsp = NULL;
1485 struct TCP_Server_Info *server;
1486 struct cifs_ses *ses = tcon->ses;
1488 cifs_dbg(FYI, "Query Info\n");
1490 if (ses && (ses->server))
1491 server = ses->server;
1495 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
1499 req->InfoType = SMB2_O_INFO_FILE;
1500 req->FileInfoClass = info_class;
1501 req->PersistentFileId = persistent_fid;
1502 req->VolatileFileId = volatile_fid;
1503 /* 4 for rfc1002 length field and 1 for Buffer */
1504 req->InputBufferOffset =
1505 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
1506 req->OutputBufferLength = cpu_to_le32(output_len);
1508 iov[0].iov_base = (char *)req;
1509 /* 4 for rfc1002 length field */
1510 iov[0].iov_len = get_rfc1002_length(req) + 4;
1512 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1513 rsp = (struct smb2_query_info_rsp *)iov[0].iov_base;
1516 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
1520 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
1521 le32_to_cpu(rsp->OutputBufferLength),
1522 &rsp->hdr, min_len, data);
1525 free_rsp_buf(resp_buftype, rsp);
1530 SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
1531 u64 persistent_fid, u64 volatile_fid,
1532 struct smb2_file_all_info *data)
1534 return query_info(xid, tcon, persistent_fid, volatile_fid,
1535 FILE_ALL_INFORMATION,
1536 sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
1537 sizeof(struct smb2_file_all_info), data);
1541 SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
1542 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
1544 return query_info(xid, tcon, persistent_fid, volatile_fid,
1545 FILE_INTERNAL_INFORMATION,
1546 sizeof(struct smb2_file_internal_info),
1547 sizeof(struct smb2_file_internal_info), uniqueid);
1551 * This is a no-op for now. We're not really interested in the reply, but
1552 * rather in the fact that the server sent one and that server->lstrp
1555 * FIXME: maybe we should consider checking that the reply matches request?
1558 smb2_echo_callback(struct mid_q_entry *mid)
1560 struct TCP_Server_Info *server = mid->callback_data;
1561 struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf;
1562 unsigned int credits_received = 1;
1564 if (mid->mid_state == MID_RESPONSE_RECEIVED)
1565 credits_received = le16_to_cpu(smb2->hdr.CreditRequest);
1567 DeleteMidQEntry(mid);
1568 add_credits(server, credits_received, CIFS_ECHO_OP);
1572 SMB2_echo(struct TCP_Server_Info *server)
1574 struct smb2_echo_req *req;
1577 struct smb_rqst rqst = { .rq_iov = &iov,
1580 cifs_dbg(FYI, "In echo request\n");
1582 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
1586 req->hdr.CreditRequest = cpu_to_le16(1);
1588 iov.iov_base = (char *)req;
1589 /* 4 for rfc1002 length field */
1590 iov.iov_len = get_rfc1002_length(req) + 4;
1592 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server,
1595 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
1597 cifs_small_buf_release(req);
1602 SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1605 struct smb2_flush_req *req;
1606 struct TCP_Server_Info *server;
1607 struct cifs_ses *ses = tcon->ses;
1612 cifs_dbg(FYI, "Flush\n");
1614 if (ses && (ses->server))
1615 server = ses->server;
1619 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
1623 req->PersistentFileId = persistent_fid;
1624 req->VolatileFileId = volatile_fid;
1626 iov[0].iov_base = (char *)req;
1627 /* 4 for rfc1002 length field */
1628 iov[0].iov_len = get_rfc1002_length(req) + 4;
1630 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1632 if ((rc != 0) && tcon)
1633 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
1635 free_rsp_buf(resp_buftype, iov[0].iov_base);
1640 * To form a chain of read requests, any read requests after the first should
1641 * have the end_of_chain boolean set to true.
1644 smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms,
1645 unsigned int remaining_bytes, int request_type)
1648 struct smb2_read_req *req = NULL;
1650 rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req);
1653 if (io_parms->tcon->ses->server == NULL)
1654 return -ECONNABORTED;
1656 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1658 req->PersistentFileId = io_parms->persistent_fid;
1659 req->VolatileFileId = io_parms->volatile_fid;
1660 req->ReadChannelInfoOffset = 0; /* reserved */
1661 req->ReadChannelInfoLength = 0; /* reserved */
1662 req->Channel = 0; /* reserved */
1663 req->MinimumCount = 0;
1664 req->Length = cpu_to_le32(io_parms->length);
1665 req->Offset = cpu_to_le64(io_parms->offset);
1667 if (request_type & CHAINED_REQUEST) {
1668 if (!(request_type & END_OF_CHAIN)) {
1669 /* 4 for rfc1002 length field */
1670 req->hdr.NextCommand =
1671 cpu_to_le32(get_rfc1002_length(req) + 4);
1672 } else /* END_OF_CHAIN */
1673 req->hdr.NextCommand = 0;
1674 if (request_type & RELATED_REQUEST) {
1675 req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
1677 * Related requests use info from previous read request
1680 req->hdr.SessionId = 0xFFFFFFFF;
1681 req->hdr.TreeId = 0xFFFFFFFF;
1682 req->PersistentFileId = 0xFFFFFFFF;
1683 req->VolatileFileId = 0xFFFFFFFF;
1686 if (remaining_bytes > io_parms->length)
1687 req->RemainingBytes = cpu_to_le32(remaining_bytes);
1689 req->RemainingBytes = 0;
1691 iov[0].iov_base = (char *)req;
1692 /* 4 for rfc1002 length field */
1693 iov[0].iov_len = get_rfc1002_length(req) + 4;
1698 smb2_readv_callback(struct mid_q_entry *mid)
1700 struct cifs_readdata *rdata = mid->callback_data;
1701 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
1702 struct TCP_Server_Info *server = tcon->ses->server;
1703 struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base;
1704 unsigned int credits_received = 1;
1705 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
1707 .rq_pages = rdata->pages,
1708 .rq_npages = rdata->nr_pages,
1709 .rq_pagesz = rdata->pagesz,
1710 .rq_tailsz = rdata->tailsz };
1712 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1713 __func__, mid->mid, mid->mid_state, rdata->result,
1716 switch (mid->mid_state) {
1717 case MID_RESPONSE_RECEIVED:
1718 credits_received = le16_to_cpu(buf->CreditRequest);
1719 /* result already set, check signature */
1723 rc = smb2_verify_signature(&rqst, server);
1725 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
1728 /* FIXME: should this be counted toward the initiating task? */
1729 task_io_account_read(rdata->bytes);
1730 cifs_stats_bytes_read(tcon, rdata->bytes);
1732 case MID_REQUEST_SUBMITTED:
1733 case MID_RETRY_NEEDED:
1734 rdata->result = -EAGAIN;
1737 if (rdata->result != -ENODATA)
1738 rdata->result = -EIO;
1742 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
1744 queue_work(cifsiod_wq, &rdata->work);
1745 DeleteMidQEntry(mid);
1746 add_credits(server, credits_received, 0);
1749 /* smb2_async_readv - send an async write, and set up mid to handle result */
1751 smb2_async_readv(struct cifs_readdata *rdata)
1754 struct smb2_hdr *buf;
1755 struct cifs_io_parms io_parms;
1756 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
1759 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
1760 __func__, rdata->offset, rdata->bytes);
1762 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
1763 io_parms.offset = rdata->offset;
1764 io_parms.length = rdata->bytes;
1765 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
1766 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
1767 io_parms.pid = rdata->pid;
1768 rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0);
1772 buf = (struct smb2_hdr *)rdata->iov.iov_base;
1773 /* 4 for rfc1002 length field */
1774 rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4;
1776 kref_get(&rdata->refcount);
1777 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
1778 cifs_readv_receive, smb2_readv_callback,
1781 kref_put(&rdata->refcount, cifs_readdata_release);
1782 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
1785 cifs_small_buf_release(buf);
1790 SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
1791 unsigned int *nbytes, char **buf, int *buf_type)
1793 int resp_buftype, rc = -EACCES;
1794 struct smb2_read_rsp *rsp = NULL;
1798 rc = smb2_new_read_req(iov, io_parms, 0, 0);
1802 rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1,
1803 &resp_buftype, CIFS_LOG_ERROR);
1805 rsp = (struct smb2_read_rsp *)iov[0].iov_base;
1807 if (rsp->hdr.Status == STATUS_END_OF_FILE) {
1808 free_rsp_buf(resp_buftype, iov[0].iov_base);
1813 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
1814 cifs_dbg(VFS, "Send error in read = %d\n", rc);
1816 *nbytes = le32_to_cpu(rsp->DataLength);
1817 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
1818 (*nbytes > io_parms->length)) {
1819 cifs_dbg(FYI, "bad length %d for count %d\n",
1820 *nbytes, io_parms->length);
1827 memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset,
1829 free_rsp_buf(resp_buftype, iov[0].iov_base);
1830 } else if (resp_buftype != CIFS_NO_BUFFER) {
1831 *buf = iov[0].iov_base;
1832 if (resp_buftype == CIFS_SMALL_BUFFER)
1833 *buf_type = CIFS_SMALL_BUFFER;
1834 else if (resp_buftype == CIFS_LARGE_BUFFER)
1835 *buf_type = CIFS_LARGE_BUFFER;
1841 * Check the mid_state and signature on received buffer (if any), and queue the
1842 * workqueue completion task.
1845 smb2_writev_callback(struct mid_q_entry *mid)
1847 struct cifs_writedata *wdata = mid->callback_data;
1848 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1849 unsigned int written;
1850 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
1851 unsigned int credits_received = 1;
1853 switch (mid->mid_state) {
1854 case MID_RESPONSE_RECEIVED:
1855 credits_received = le16_to_cpu(rsp->hdr.CreditRequest);
1856 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
1857 if (wdata->result != 0)
1860 written = le32_to_cpu(rsp->DataLength);
1862 * Mask off high 16 bits when bytes written as returned
1863 * by the server is greater than bytes requested by the
1864 * client. OS/2 servers are known to set incorrect
1867 if (written > wdata->bytes)
1870 if (written < wdata->bytes)
1871 wdata->result = -ENOSPC;
1873 wdata->bytes = written;
1875 case MID_REQUEST_SUBMITTED:
1876 case MID_RETRY_NEEDED:
1877 wdata->result = -EAGAIN;
1880 wdata->result = -EIO;
1885 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1887 queue_work(cifsiod_wq, &wdata->work);
1888 DeleteMidQEntry(mid);
1889 add_credits(tcon->ses->server, credits_received, 0);
1892 /* smb2_async_writev - send an async write, and set up mid to handle result */
1894 smb2_async_writev(struct cifs_writedata *wdata,
1895 void (*release)(struct kref *kref))
1898 struct smb2_write_req *req = NULL;
1899 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1901 struct smb_rqst rqst;
1903 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
1905 goto async_writev_out;
1907 req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid);
1909 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
1910 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
1911 req->WriteChannelInfoOffset = 0;
1912 req->WriteChannelInfoLength = 0;
1914 req->Offset = cpu_to_le64(wdata->offset);
1915 /* 4 for rfc1002 length field */
1916 req->DataOffset = cpu_to_le16(
1917 offsetof(struct smb2_write_req, Buffer) - 4);
1918 req->RemainingBytes = 0;
1920 /* 4 for rfc1002 length field and 1 for Buffer */
1921 iov.iov_len = get_rfc1002_length(req) + 4 - 1;
1926 rqst.rq_pages = wdata->pages;
1927 rqst.rq_npages = wdata->nr_pages;
1928 rqst.rq_pagesz = wdata->pagesz;
1929 rqst.rq_tailsz = wdata->tailsz;
1931 cifs_dbg(FYI, "async write at %llu %u bytes\n",
1932 wdata->offset, wdata->bytes);
1934 req->Length = cpu_to_le32(wdata->bytes);
1936 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
1938 kref_get(&wdata->refcount);
1939 rc = cifs_call_async(tcon->ses->server, &rqst, NULL,
1940 smb2_writev_callback, wdata, 0);
1943 kref_put(&wdata->refcount, release);
1944 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1948 cifs_small_buf_release(req);
1953 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1954 * The length field from io_parms must be at least 1 and indicates a number of
1955 * elements with data to write that begins with position 1 in iov array. All
1956 * data length is specified by count.
1959 SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
1960 unsigned int *nbytes, struct kvec *iov, int n_vec)
1963 struct smb2_write_req *req = NULL;
1964 struct smb2_write_rsp *rsp = NULL;
1971 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
1975 if (io_parms->tcon->ses->server == NULL)
1976 return -ECONNABORTED;
1978 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1980 req->PersistentFileId = io_parms->persistent_fid;
1981 req->VolatileFileId = io_parms->volatile_fid;
1982 req->WriteChannelInfoOffset = 0;
1983 req->WriteChannelInfoLength = 0;
1985 req->Length = cpu_to_le32(io_parms->length);
1986 req->Offset = cpu_to_le64(io_parms->offset);
1987 /* 4 for rfc1002 length field */
1988 req->DataOffset = cpu_to_le16(
1989 offsetof(struct smb2_write_req, Buffer) - 4);
1990 req->RemainingBytes = 0;
1992 iov[0].iov_base = (char *)req;
1993 /* 4 for rfc1002 length field and 1 for Buffer */
1994 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1996 /* length of entire message including data to be written */
1997 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
1999 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
2001 rsp = (struct smb2_write_rsp *)iov[0].iov_base;
2004 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
2005 cifs_dbg(VFS, "Send error in write = %d\n", rc);
2007 *nbytes = le32_to_cpu(rsp->DataLength);
2009 free_rsp_buf(resp_buftype, rsp);
2014 num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
2017 unsigned int entrycount = 0;
2018 unsigned int next_offset = 0;
2019 FILE_DIRECTORY_INFO *entryptr;
2021 if (bufstart == NULL)
2024 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
2027 entryptr = (FILE_DIRECTORY_INFO *)
2028 ((char *)entryptr + next_offset);
2030 if ((char *)entryptr + size > end_of_buf) {
2031 cifs_dbg(VFS, "malformed search entry would overflow\n");
2035 len = le32_to_cpu(entryptr->FileNameLength);
2036 if ((char *)entryptr + len + size > end_of_buf) {
2037 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
2042 *lastentry = (char *)entryptr;
2045 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
2057 SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
2058 u64 persistent_fid, u64 volatile_fid, int index,
2059 struct cifs_search_info *srch_inf)
2061 struct smb2_query_directory_req *req;
2062 struct smb2_query_directory_rsp *rsp = NULL;
2067 unsigned char *bufptr;
2068 struct TCP_Server_Info *server;
2069 struct cifs_ses *ses = tcon->ses;
2070 __le16 asteriks = cpu_to_le16('*');
2072 unsigned int output_size = CIFSMaxBufSize;
2073 size_t info_buf_size;
2075 if (ses && (ses->server))
2076 server = ses->server;
2080 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
2084 switch (srch_inf->info_level) {
2085 case SMB_FIND_FILE_DIRECTORY_INFO:
2086 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
2087 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
2089 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
2090 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
2091 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
2094 cifs_dbg(VFS, "info level %u isn't supported\n",
2095 srch_inf->info_level);
2100 req->FileIndex = cpu_to_le32(index);
2101 req->PersistentFileId = persistent_fid;
2102 req->VolatileFileId = volatile_fid;
2105 bufptr = req->Buffer;
2106 memcpy(bufptr, &asteriks, len);
2108 req->FileNameOffset =
2109 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
2110 req->FileNameLength = cpu_to_le16(len);
2112 * BB could be 30 bytes or so longer if we used SMB2 specific
2113 * buffer lengths, but this is safe and close enough.
2115 output_size = min_t(unsigned int, output_size, server->maxBuf);
2116 output_size = min_t(unsigned int, output_size, 2 << 15);
2117 req->OutputBufferLength = cpu_to_le32(output_size);
2119 iov[0].iov_base = (char *)req;
2120 /* 4 for RFC1001 length and 1 for Buffer */
2121 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2123 iov[1].iov_base = (char *)(req->Buffer);
2124 iov[1].iov_len = len;
2126 inc_rfc1001_len(req, len - 1 /* Buffer */);
2128 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
2129 rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base;
2132 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
2136 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2137 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2142 srch_inf->unicode = true;
2144 if (srch_inf->ntwrk_buf_start) {
2145 if (srch_inf->smallBuf)
2146 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
2148 cifs_buf_release(srch_inf->ntwrk_buf_start);
2150 srch_inf->ntwrk_buf_start = (char *)rsp;
2151 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
2152 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
2153 /* 4 for rfc1002 length field */
2154 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
2155 srch_inf->entries_in_buffer =
2156 num_entries(srch_inf->srch_entries_start, end_of_smb,
2157 &srch_inf->last_entry, info_buf_size);
2158 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
2159 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
2160 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
2161 srch_inf->srch_entries_start, srch_inf->last_entry);
2162 if (resp_buftype == CIFS_LARGE_BUFFER)
2163 srch_inf->smallBuf = false;
2164 else if (resp_buftype == CIFS_SMALL_BUFFER)
2165 srch_inf->smallBuf = true;
2167 cifs_dbg(VFS, "illegal search buffer type\n");
2169 if (rsp->hdr.Status == STATUS_NO_MORE_FILES)
2170 srch_inf->endOfSearch = 1;
2172 srch_inf->endOfSearch = 0;
2177 free_rsp_buf(resp_buftype, rsp);
2182 send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2183 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
2184 unsigned int num, void **data, unsigned int *size)
2186 struct smb2_set_info_req *req;
2187 struct smb2_set_info_rsp *rsp = NULL;
2192 struct TCP_Server_Info *server;
2193 struct cifs_ses *ses = tcon->ses;
2195 if (ses && (ses->server))
2196 server = ses->server;
2203 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
2207 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
2213 req->hdr.ProcessId = cpu_to_le32(pid);
2215 req->InfoType = SMB2_O_INFO_FILE;
2216 req->FileInfoClass = info_class;
2217 req->PersistentFileId = persistent_fid;
2218 req->VolatileFileId = volatile_fid;
2220 /* 4 for RFC1001 length and 1 for Buffer */
2222 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
2223 req->BufferLength = cpu_to_le32(*size);
2225 inc_rfc1001_len(req, *size - 1 /* Buffer */);
2227 memcpy(req->Buffer, *data, *size);
2229 iov[0].iov_base = (char *)req;
2230 /* 4 for RFC1001 length */
2231 iov[0].iov_len = get_rfc1002_length(req) + 4;
2233 for (i = 1; i < num; i++) {
2234 inc_rfc1001_len(req, size[i]);
2235 le32_add_cpu(&req->BufferLength, size[i]);
2236 iov[i].iov_base = (char *)data[i];
2237 iov[i].iov_len = size[i];
2240 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0);
2241 rsp = (struct smb2_set_info_rsp *)iov[0].iov_base;
2244 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
2246 free_rsp_buf(resp_buftype, rsp);
2252 SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
2253 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2255 struct smb2_file_rename_info info;
2257 unsigned int size[2];
2259 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2261 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2265 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
2266 /* 0 = fail if target already exists */
2267 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2268 info.FileNameLength = cpu_to_le32(len);
2271 size[0] = sizeof(struct smb2_file_rename_info);
2273 data[1] = target_file;
2274 size[1] = len + 2 /* null */;
2276 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
2277 current->tgid, FILE_RENAME_INFORMATION, 2, data,
2284 SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
2285 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2287 struct smb2_file_link_info info;
2289 unsigned int size[2];
2291 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2293 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2297 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
2298 /* 0 = fail if link already exists */
2299 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2300 info.FileNameLength = cpu_to_le32(len);
2303 size[0] = sizeof(struct smb2_file_link_info);
2305 data[1] = target_file;
2306 size[1] = len + 2 /* null */;
2308 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
2309 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
2315 SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2316 u64 volatile_fid, u32 pid, __le64 *eof)
2318 struct smb2_file_eof_info info;
2322 info.EndOfFile = *eof;
2325 size = sizeof(struct smb2_file_eof_info);
2327 return send_set_info(xid, tcon, persistent_fid, volatile_fid, pid,
2328 FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
2332 SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2333 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
2336 size = sizeof(FILE_BASIC_INFO);
2337 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2338 current->tgid, FILE_BASIC_INFORMATION, 1,
2339 (void **)&buf, &size);
2343 SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
2344 const u64 persistent_fid, const u64 volatile_fid,
2348 struct smb2_oplock_break *req = NULL;
2350 cifs_dbg(FYI, "SMB2_oplock_break\n");
2351 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2356 req->VolatileFid = volatile_fid;
2357 req->PersistentFid = persistent_fid;
2358 req->OplockLevel = oplock_level;
2359 req->hdr.CreditRequest = cpu_to_le16(1);
2361 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2362 /* SMB2 buffer freed by function above */
2365 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2366 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
2373 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
2374 struct kstatfs *kst)
2376 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
2377 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
2378 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
2379 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
2380 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
2385 build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
2386 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
2389 struct smb2_query_info_req *req;
2391 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
2393 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
2396 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2400 req->InfoType = SMB2_O_INFO_FILESYSTEM;
2401 req->FileInfoClass = level;
2402 req->PersistentFileId = persistent_fid;
2403 req->VolatileFileId = volatile_fid;
2404 /* 4 for rfc1002 length field and 1 for pad */
2405 req->InputBufferOffset =
2406 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
2407 req->OutputBufferLength = cpu_to_le32(
2408 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
2410 iov->iov_base = (char *)req;
2411 /* 4 for rfc1002 length field */
2412 iov->iov_len = get_rfc1002_length(req) + 4;
2417 SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
2418 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
2420 struct smb2_query_info_rsp *rsp = NULL;
2424 struct cifs_ses *ses = tcon->ses;
2425 struct smb2_fs_full_size_info *info = NULL;
2427 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
2428 sizeof(struct smb2_fs_full_size_info),
2429 persistent_fid, volatile_fid);
2433 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2435 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2438 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2440 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
2441 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
2442 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2443 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2444 sizeof(struct smb2_fs_full_size_info));
2446 copy_fs_info_to_kstatfs(info, fsdata);
2449 free_rsp_buf(resp_buftype, iov.iov_base);
2454 SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2455 u64 persistent_fid, u64 volatile_fid, int level)
2457 struct smb2_query_info_rsp *rsp = NULL;
2460 int resp_buftype, max_len, min_len;
2461 struct cifs_ses *ses = tcon->ses;
2462 unsigned int rsp_len, offset;
2464 if (level == FS_DEVICE_INFORMATION) {
2465 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2466 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2467 } else if (level == FS_ATTRIBUTE_INFORMATION) {
2468 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
2469 min_len = MIN_FS_ATTR_INFO_SIZE;
2470 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
2471 max_len = sizeof(struct smb3_fs_ss_info);
2472 min_len = sizeof(struct smb3_fs_ss_info);
2474 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2478 rc = build_qfs_info_req(&iov, tcon, level, max_len,
2479 persistent_fid, volatile_fid);
2483 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2485 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2488 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2490 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
2491 offset = le16_to_cpu(rsp->OutputBufferOffset);
2492 rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
2496 if (level == FS_ATTRIBUTE_INFORMATION)
2497 memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
2498 + (char *)&rsp->hdr, min_t(unsigned int,
2500 else if (level == FS_DEVICE_INFORMATION)
2501 memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
2502 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
2503 else if (level == FS_SECTOR_SIZE_INFORMATION) {
2504 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
2505 (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
2506 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
2507 tcon->perf_sector_size =
2508 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
2512 free_rsp_buf(resp_buftype, iov.iov_base);
2517 smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
2518 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2519 const __u32 num_lock, struct smb2_lock_element *buf)
2522 struct smb2_lock_req *req = NULL;
2527 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
2529 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
2533 req->hdr.ProcessId = cpu_to_le32(pid);
2534 req->LockCount = cpu_to_le16(num_lock);
2536 req->PersistentFileId = persist_fid;
2537 req->VolatileFileId = volatile_fid;
2539 count = num_lock * sizeof(struct smb2_lock_element);
2540 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
2542 iov[0].iov_base = (char *)req;
2543 /* 4 for rfc1002 length field and count for all locks */
2544 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
2545 iov[1].iov_base = (char *)buf;
2546 iov[1].iov_len = count;
2548 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
2549 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP);
2551 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
2552 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
2559 SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
2560 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2561 const __u64 length, const __u64 offset, const __u32 lock_flags,
2564 struct smb2_lock_element lock;
2566 lock.Offset = cpu_to_le64(offset);
2567 lock.Length = cpu_to_le64(length);
2568 lock.Flags = cpu_to_le32(lock_flags);
2569 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
2570 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
2572 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
2576 SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
2577 __u8 *lease_key, const __le32 lease_state)
2580 struct smb2_lease_ack *req = NULL;
2582 cifs_dbg(FYI, "SMB2_lease_break\n");
2583 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2588 req->hdr.CreditRequest = cpu_to_le16(1);
2589 req->StructureSize = cpu_to_le16(36);
2590 inc_rfc1001_len(req, 12);
2592 memcpy(req->LeaseKey, lease_key, 16);
2593 req->LeaseState = lease_state;
2595 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2596 /* SMB2 buffer freed by function above */
2599 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2600 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);