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 /* ClientGUID must be zero for SMB2.02 dialect */
379 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
380 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
382 memcpy(req->ClientGUID, server->client_guid,
383 SMB2_CLIENT_GUID_SIZE);
385 iov[0].iov_base = (char *)req;
386 /* 4 for rfc1002 length field */
387 iov[0].iov_len = get_rfc1002_length(req) + 4;
389 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags);
391 rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base;
393 * No tcon so can't do
394 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
399 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
401 /* BB we may eventually want to match the negotiated vs. requested
402 dialect, even though we are only requesting one at a time */
403 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
404 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
405 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
406 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
407 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
408 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
409 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
410 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
412 cifs_dbg(VFS, "Illegal dialect returned by server %d\n",
413 le16_to_cpu(rsp->DialectRevision));
417 server->dialect = le16_to_cpu(rsp->DialectRevision);
419 /* SMB2 only has an extended negflavor */
420 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
421 /* set it to the maximum buffer size value we can send with 1 credit */
422 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
423 SMB2_MAX_BUFFER_SIZE);
424 server->max_read = le32_to_cpu(rsp->MaxReadSize);
425 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
426 /* BB Do we need to validate the SecurityMode? */
427 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
428 server->capabilities = le32_to_cpu(rsp->Capabilities);
430 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
432 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
435 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
437 * ses->sectype = RawNTLMSSP;
438 * but for time being this is our only auth choice so doesn't matter.
439 * We just found a server which sets blob length to zero expecting raw.
441 if (blob_length == 0)
442 cifs_dbg(FYI, "missing security blob on negprot\n");
444 rc = cifs_enable_signing(server, ses->sign);
445 #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
449 rc = decode_neg_token_init(security_blob, blob_length,
460 free_rsp_buf(resp_buftype, rsp);
464 int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
467 struct validate_negotiate_info_req vneg_inbuf;
468 struct validate_negotiate_info_rsp *pneg_rsp;
471 cifs_dbg(FYI, "validate negotiate\n");
474 * validation ioctl must be signed, so no point sending this if we
475 * can not sign it. We could eventually change this to selectively
476 * sign just this, the first and only signed request on a connection.
477 * This is good enough for now since a user who wants better security
478 * would also enable signing on the mount. Having validation of
479 * negotiate info for signed connections helps reduce attack vectors
481 if (tcon->ses->server->sign == false)
482 return 0; /* validation requires signing */
484 vneg_inbuf.Capabilities =
485 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
486 memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid,
487 SMB2_CLIENT_GUID_SIZE);
490 vneg_inbuf.SecurityMode =
491 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
492 else if (global_secflags & CIFSSEC_MAY_SIGN)
493 vneg_inbuf.SecurityMode =
494 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
496 vneg_inbuf.SecurityMode = 0;
498 vneg_inbuf.DialectCount = cpu_to_le16(1);
499 vneg_inbuf.Dialects[0] =
500 cpu_to_le16(tcon->ses->server->vals->protocol_id);
502 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
503 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
504 (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
505 (char **)&pneg_rsp, &rsplen);
508 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
512 if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
513 cifs_dbg(VFS, "invalid size of protocol negotiate response\n");
517 /* check validate negotiate info response matches what we got earlier */
518 if (pneg_rsp->Dialect !=
519 cpu_to_le16(tcon->ses->server->vals->protocol_id))
522 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
525 /* do not validate server guid because not saved at negprot time yet */
527 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
528 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
531 /* validate negotiate successful */
532 cifs_dbg(FYI, "validate negotiate info successful\n");
536 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
541 SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
542 const struct nls_table *nls_cp)
544 struct smb2_sess_setup_req *req;
545 struct smb2_sess_setup_rsp *rsp = NULL;
549 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
550 struct TCP_Server_Info *server = ses->server;
553 char *ntlmssp_blob = NULL;
554 bool use_spnego = false; /* else use raw ntlmssp */
556 cifs_dbg(FYI, "Session Setup\n");
559 WARN(1, "%s: server is NULL!\n", __func__);
564 * If we are here due to reconnect, free per-smb session key
565 * in case signing was required.
567 kfree(ses->auth_key.response);
568 ses->auth_key.response = NULL;
571 * If memory allocation is successful, caller of this function
574 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
577 ses->ntlmssp->sesskey_per_smbsess = true;
579 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
580 ses->sectype = RawNTLMSSP;
582 ssetup_ntlmssp_authenticate:
583 if (phase == NtLmChallenge)
584 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
586 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
590 req->hdr.SessionId = 0; /* First session, not a reauthenticate */
591 req->VcNumber = 0; /* MBZ */
592 /* to enable echos and oplocks */
593 req->hdr.CreditRequest = cpu_to_le16(3);
595 /* only one of SMB2 signing flags may be set in SMB2 request */
597 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
598 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
599 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
601 req->SecurityMode = 0;
603 req->Capabilities = 0;
604 req->Channel = 0; /* MBZ */
606 iov[0].iov_base = (char *)req;
607 /* 4 for rfc1002 length field and 1 for pad */
608 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
609 if (phase == NtLmNegotiate) {
610 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
612 if (ntlmssp_blob == NULL) {
616 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
618 /* blob_length = build_spnego_ntlmssp_blob(
620 sizeof(struct _NEGOTIATE_MESSAGE),
622 /* BB eventually need to add this */
623 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
628 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
629 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
630 security_blob = ntlmssp_blob;
632 } else if (phase == NtLmAuthenticate) {
633 req->hdr.SessionId = ses->Suid;
634 ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500,
636 if (ntlmssp_blob == NULL) {
640 rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses,
643 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n",
645 goto ssetup_exit; /* BB double check error handling */
648 /* blob_length = build_spnego_ntlmssp_blob(
652 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
657 security_blob = ntlmssp_blob;
660 cifs_dbg(VFS, "illegal ntlmssp phase\n");
665 /* Testing shows that buffer offset must be at location of Buffer[0] */
666 req->SecurityBufferOffset =
667 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
668 1 /* pad */ - 4 /* rfc1001 len */);
669 req->SecurityBufferLength = cpu_to_le16(blob_length);
670 iov[1].iov_base = security_blob;
671 iov[1].iov_len = blob_length;
673 inc_rfc1001_len(req, blob_length - 1 /* pad */);
675 /* BB add code to build os and lm fields */
677 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype,
678 CIFS_LOG_ERROR | CIFS_NEG_OP);
680 kfree(security_blob);
681 rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base;
682 if (resp_buftype != CIFS_NO_BUFFER &&
683 rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) {
684 if (phase != NtLmNegotiate) {
685 cifs_dbg(VFS, "Unexpected more processing error\n");
688 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
689 le16_to_cpu(rsp->SecurityBufferOffset)) {
690 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
691 le16_to_cpu(rsp->SecurityBufferOffset));
696 /* NTLMSSP Negotiate sent now processing challenge (response) */
697 phase = NtLmChallenge; /* process ntlmssp challenge */
698 rc = 0; /* MORE_PROCESSING is not an error here but expected */
699 ses->Suid = rsp->hdr.SessionId;
700 rc = decode_ntlmssp_challenge(rsp->Buffer,
701 le16_to_cpu(rsp->SecurityBufferLength), ses);
705 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
706 * but at least the raw NTLMSSP case works.
709 * No tcon so can't do
710 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
715 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
716 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
717 cifs_dbg(VFS, "SMB3 encryption not supported yet\n");
719 free_rsp_buf(resp_buftype, rsp);
721 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
722 if ((phase == NtLmChallenge) && (rc == 0))
723 goto ssetup_ntlmssp_authenticate;
726 mutex_lock(&server->srv_mutex);
727 if (server->sign && server->ops->generate_signingkey) {
728 rc = server->ops->generate_signingkey(ses);
729 kfree(ses->auth_key.response);
730 ses->auth_key.response = NULL;
733 "SMB3 session key generation failed\n");
734 mutex_unlock(&server->srv_mutex);
738 if (!server->session_estab) {
739 server->sequence_number = 0x2;
740 server->session_estab = true;
742 mutex_unlock(&server->srv_mutex);
744 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
745 spin_lock(&GlobalMid_Lock);
746 ses->status = CifsGood;
747 ses->need_reconnect = false;
748 spin_unlock(&GlobalMid_Lock);
753 kfree(ses->auth_key.response);
754 ses->auth_key.response = NULL;
762 SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
764 struct smb2_logoff_req *req; /* response is also trivial struct */
766 struct TCP_Server_Info *server;
768 cifs_dbg(FYI, "disconnect session %p\n", ses);
770 if (ses && (ses->server))
771 server = ses->server;
775 /* no need to send SMB logoff if uid already closed due to reconnect */
776 if (ses->need_reconnect)
777 goto smb2_session_already_dead;
779 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
783 /* since no tcon, smb2_init can not do this, so do here */
784 req->hdr.SessionId = ses->Suid;
786 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
788 rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0);
790 * No tcon so can't do
791 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
794 smb2_session_already_dead:
798 static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
800 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
803 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
805 /* These are similar values to what Windows uses */
806 static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
808 tcon->max_chunks = 256;
809 tcon->max_bytes_chunk = 1048576;
810 tcon->max_bytes_copy = 16777216;
814 SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
815 struct cifs_tcon *tcon, const struct nls_table *cp)
817 struct smb2_tree_connect_req *req;
818 struct smb2_tree_connect_rsp *rsp = NULL;
823 struct TCP_Server_Info *server;
824 __le16 *unc_path = NULL;
826 cifs_dbg(FYI, "TCON\n");
828 if ((ses->server) && tree)
829 server = ses->server;
833 if (tcon && tcon->bad_network_name)
836 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
837 if (unc_path == NULL)
840 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
842 if (unc_path_len < 2) {
847 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
854 /* since no tcon, smb2_init can not do this, so do here */
855 req->hdr.SessionId = ses->Suid;
856 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
857 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
860 iov[0].iov_base = (char *)req;
861 /* 4 for rfc1002 length field and 1 for pad */
862 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
864 /* Testing shows that buffer offset must be at location of Buffer[0] */
865 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
866 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
867 req->PathLength = cpu_to_le16(unc_path_len - 2);
868 iov[1].iov_base = unc_path;
869 iov[1].iov_len = unc_path_len;
871 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
873 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
874 rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base;
878 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
879 tcon->need_reconnect = true;
881 goto tcon_error_exit;
885 ses->ipc_tid = rsp->hdr.TreeId;
889 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
890 cifs_dbg(FYI, "connection to disk share\n");
891 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
893 cifs_dbg(FYI, "connection to pipe share\n");
894 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
896 cifs_dbg(FYI, "connection to printer\n");
898 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
900 goto tcon_error_exit;
903 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
904 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
905 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
906 tcon->tidStatus = CifsGood;
907 tcon->need_reconnect = false;
908 tcon->tid = rsp->hdr.TreeId;
909 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
911 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
912 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
913 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
914 init_copy_chunk_defaults(tcon);
915 if (tcon->ses->server->ops->validate_negotiate)
916 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
918 free_rsp_buf(resp_buftype, rsp);
923 if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) {
924 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
925 tcon->bad_network_name = true;
931 SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
933 struct smb2_tree_disconnect_req *req; /* response is trivial */
935 struct TCP_Server_Info *server;
936 struct cifs_ses *ses = tcon->ses;
938 cifs_dbg(FYI, "Tree Disconnect\n");
940 if (ses && (ses->server))
941 server = ses->server;
945 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
948 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
952 rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0);
954 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
960 static struct create_durable *
961 create_durable_buf(void)
963 struct create_durable *buf;
965 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
969 buf->ccontext.DataOffset = cpu_to_le16(offsetof
970 (struct create_durable, Data));
971 buf->ccontext.DataLength = cpu_to_le32(16);
972 buf->ccontext.NameOffset = cpu_to_le16(offsetof
973 (struct create_durable, Name));
974 buf->ccontext.NameLength = cpu_to_le16(4);
975 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
983 static struct create_durable *
984 create_reconnect_durable_buf(struct cifs_fid *fid)
986 struct create_durable *buf;
988 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
992 buf->ccontext.DataOffset = cpu_to_le16(offsetof
993 (struct create_durable, Data));
994 buf->ccontext.DataLength = cpu_to_le32(16);
995 buf->ccontext.NameOffset = cpu_to_le16(offsetof
996 (struct create_durable, Name));
997 buf->ccontext.NameLength = cpu_to_le16(4);
998 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
999 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
1000 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1009 parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
1010 unsigned int *epoch)
1013 struct create_context *cc;
1014 unsigned int next = 0;
1017 data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
1018 cc = (struct create_context *)data_offset;
1020 cc = (struct create_context *)((char *)cc + next);
1021 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
1022 if (le16_to_cpu(cc->NameLength) != 4 ||
1023 strncmp(name, "RqLs", 4)) {
1024 next = le32_to_cpu(cc->Next);
1027 return server->ops->parse_lease_buf(cc, epoch);
1028 } while (next != 0);
1034 add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1035 unsigned int *num_iovec, __u8 *oplock)
1037 struct smb2_create_req *req = iov[0].iov_base;
1038 unsigned int num = *num_iovec;
1040 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
1041 if (iov[num].iov_base == NULL)
1043 iov[num].iov_len = server->vals->create_lease_size;
1044 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1045 if (!req->CreateContextsOffset)
1046 req->CreateContextsOffset = cpu_to_le32(
1047 sizeof(struct smb2_create_req) - 4 +
1048 iov[num - 1].iov_len);
1049 le32_add_cpu(&req->CreateContextsLength,
1050 server->vals->create_lease_size);
1051 inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
1052 *num_iovec = num + 1;
1057 add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1058 struct cifs_open_parms *oparms)
1060 struct smb2_create_req *req = iov[0].iov_base;
1061 unsigned int num = *num_iovec;
1063 if (oparms->reconnect) {
1064 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1065 /* indicate that we don't need to relock the file */
1066 oparms->reconnect = false;
1068 iov[num].iov_base = create_durable_buf();
1069 if (iov[num].iov_base == NULL)
1071 iov[num].iov_len = sizeof(struct create_durable);
1072 if (!req->CreateContextsOffset)
1073 req->CreateContextsOffset =
1074 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1076 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
1077 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
1078 *num_iovec = num + 1;
1083 SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
1084 __u8 *oplock, struct smb2_file_all_info *buf,
1085 struct smb2_err_rsp **err_buf)
1087 struct smb2_create_req *req;
1088 struct smb2_create_rsp *rsp;
1089 struct TCP_Server_Info *server;
1090 struct cifs_tcon *tcon = oparms->tcon;
1091 struct cifs_ses *ses = tcon->ses;
1095 __le16 *copy_path = NULL;
1098 unsigned int num_iovecs = 2;
1099 __u32 file_attributes = 0;
1101 cifs_dbg(FYI, "create/open\n");
1103 if (ses && (ses->server))
1104 server = ses->server;
1108 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
1112 if (oparms->create_options & CREATE_OPTION_READONLY)
1113 file_attributes |= ATTR_READONLY;
1115 req->ImpersonationLevel = IL_IMPERSONATION;
1116 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
1117 /* File attributes ignored on open (used in create though) */
1118 req->FileAttributes = cpu_to_le32(file_attributes);
1119 req->ShareAccess = FILE_SHARE_ALL_LE;
1120 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1121 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
1122 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
1123 /* do not count rfc1001 len field */
1124 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
1126 iov[0].iov_base = (char *)req;
1127 /* 4 for rfc1002 length field */
1128 iov[0].iov_len = get_rfc1002_length(req) + 4;
1130 /* MUST set path len (NameLength) to 0 opening root of share */
1131 req->NameLength = cpu_to_le16(uni_path_len - 2);
1132 /* -1 since last byte is buf[0] which is sent below (path) */
1134 if (uni_path_len % 8 != 0) {
1135 copy_size = uni_path_len / 8 * 8;
1136 if (copy_size < uni_path_len)
1139 copy_path = kzalloc(copy_size, GFP_KERNEL);
1142 memcpy((char *)copy_path, (const char *)path,
1144 uni_path_len = copy_size;
1148 iov[1].iov_len = uni_path_len;
1149 iov[1].iov_base = path;
1150 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1151 inc_rfc1001_len(req, uni_path_len - 1);
1153 if (!server->oplocks)
1154 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1156 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
1157 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1158 req->RequestedOplockLevel = *oplock;
1160 rc = add_lease_context(server, iov, &num_iovecs, oplock);
1162 cifs_small_buf_release(req);
1168 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1169 /* need to set Next field of lease context if we request it */
1170 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
1171 struct create_context *ccontext =
1172 (struct create_context *)iov[num_iovecs-1].iov_base;
1174 cpu_to_le32(server->vals->create_lease_size);
1176 rc = add_durable_context(iov, &num_iovecs, oparms);
1178 cifs_small_buf_release(req);
1180 kfree(iov[num_iovecs-1].iov_base);
1185 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1186 rsp = (struct smb2_create_rsp *)iov[0].iov_base;
1189 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
1191 *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
1196 oparms->fid->persistent_fid = rsp->PersistentFileId;
1197 oparms->fid->volatile_fid = rsp->VolatileFileId;
1200 memcpy(buf, &rsp->CreationTime, 32);
1201 buf->AllocationSize = rsp->AllocationSize;
1202 buf->EndOfFile = rsp->EndofFile;
1203 buf->Attributes = rsp->FileAttributes;
1204 buf->NumberOfLinks = cpu_to_le32(1);
1205 buf->DeletePending = 0;
1208 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
1209 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
1211 *oplock = rsp->OplockLevel;
1214 free_rsp_buf(resp_buftype, rsp);
1219 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1222 SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1223 u64 volatile_fid, u32 opcode, bool is_fsctl, char *in_data,
1224 u32 indatalen, char **out_data, u32 *plen /* returned data len */)
1226 struct smb2_ioctl_req *req;
1227 struct smb2_ioctl_rsp *rsp;
1228 struct TCP_Server_Info *server;
1229 struct cifs_ses *ses = tcon->ses;
1235 cifs_dbg(FYI, "SMB2 IOCTL\n");
1238 /* zero out returned data len, in case of error */
1242 if (ses && (ses->server))
1243 server = ses->server;
1247 rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req);
1251 req->CtlCode = cpu_to_le32(opcode);
1252 req->PersistentFileId = persistent_fid;
1253 req->VolatileFileId = volatile_fid;
1256 req->InputCount = cpu_to_le32(indatalen);
1257 /* do not set InputOffset if no input data */
1259 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4);
1260 iov[1].iov_base = in_data;
1261 iov[1].iov_len = indatalen;
1266 req->OutputOffset = 0;
1267 req->OutputCount = 0; /* MBZ */
1270 * Could increase MaxOutputResponse, but that would require more
1271 * than one credit. Windows typically sets this smaller, but for some
1272 * ioctls it may be useful to allow server to send more. No point
1273 * limiting what the server can send as long as fits in one credit
1275 req->MaxOutputResponse = cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1278 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
1282 iov[0].iov_base = (char *)req;
1285 * If no input data, the size of ioctl struct in
1286 * protocol spec still includes a 1 byte data buffer,
1287 * but if input data passed to ioctl, we do not
1288 * want to double count this, so we do not send
1289 * the dummy one byte of data in iovec[0] if sending
1290 * input data (in iovec[1]). We also must add 4 bytes
1291 * in first iovec to allow for rfc1002 length field.
1295 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1296 inc_rfc1001_len(req, indatalen - 1);
1298 iov[0].iov_len = get_rfc1002_length(req) + 4;
1301 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1302 rsp = (struct smb2_ioctl_rsp *)iov[0].iov_base;
1304 if ((rc != 0) && (rc != -EINVAL)) {
1306 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1308 } else if (rc == -EINVAL) {
1309 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
1310 (opcode != FSCTL_SRV_COPYCHUNK)) {
1312 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1317 /* check if caller wants to look at return data or just return rc */
1318 if ((plen == NULL) || (out_data == NULL))
1321 *plen = le32_to_cpu(rsp->OutputCount);
1323 /* We check for obvious errors in the output buffer length and offset */
1325 goto ioctl_exit; /* server returned no data */
1326 else if (*plen > 0xFF00) {
1327 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
1333 if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
1334 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
1335 le32_to_cpu(rsp->OutputOffset));
1341 *out_data = kmalloc(*plen, GFP_KERNEL);
1342 if (*out_data == NULL) {
1347 memcpy(*out_data, rsp->hdr.ProtocolId + le32_to_cpu(rsp->OutputOffset),
1350 free_rsp_buf(resp_buftype, rsp);
1355 * Individual callers to ioctl worker function follow
1359 SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1360 u64 persistent_fid, u64 volatile_fid)
1363 struct compress_ioctl fsctl_input;
1364 char *ret_data = NULL;
1366 fsctl_input.CompressionState =
1367 __constant_cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
1369 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1370 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
1371 (char *)&fsctl_input /* data input */,
1372 2 /* in data len */, &ret_data /* out data */, NULL);
1374 cifs_dbg(FYI, "set compression rc %d\n", rc);
1380 SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1381 u64 persistent_fid, u64 volatile_fid)
1383 struct smb2_close_req *req;
1384 struct smb2_close_rsp *rsp;
1385 struct TCP_Server_Info *server;
1386 struct cifs_ses *ses = tcon->ses;
1391 cifs_dbg(FYI, "Close\n");
1393 if (ses && (ses->server))
1394 server = ses->server;
1398 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1402 req->PersistentFileId = persistent_fid;
1403 req->VolatileFileId = volatile_fid;
1405 iov[0].iov_base = (char *)req;
1406 /* 4 for rfc1002 length field */
1407 iov[0].iov_len = get_rfc1002_length(req) + 4;
1409 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1410 rsp = (struct smb2_close_rsp *)iov[0].iov_base;
1414 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
1418 /* BB FIXME - decode close response, update inode for caching */
1421 free_rsp_buf(resp_buftype, rsp);
1426 validate_buf(unsigned int offset, unsigned int buffer_length,
1427 struct smb2_hdr *hdr, unsigned int min_buf_size)
1430 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
1431 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
1432 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1433 char *end_of_buf = begin_of_buf + buffer_length;
1436 if (buffer_length < min_buf_size) {
1437 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
1438 buffer_length, min_buf_size);
1442 /* check if beyond RFC1001 maximum length */
1443 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
1444 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
1445 buffer_length, smb_len);
1449 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
1450 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
1458 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1459 * Caller must free buffer.
1462 validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
1463 struct smb2_hdr *hdr, unsigned int minbufsize,
1467 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1473 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
1477 memcpy(data, begin_of_buf, buffer_length);
1483 query_info(const unsigned int xid, struct cifs_tcon *tcon,
1484 u64 persistent_fid, u64 volatile_fid, u8 info_class,
1485 size_t output_len, size_t min_len, void *data)
1487 struct smb2_query_info_req *req;
1488 struct smb2_query_info_rsp *rsp = NULL;
1492 struct TCP_Server_Info *server;
1493 struct cifs_ses *ses = tcon->ses;
1495 cifs_dbg(FYI, "Query Info\n");
1497 if (ses && (ses->server))
1498 server = ses->server;
1502 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
1506 req->InfoType = SMB2_O_INFO_FILE;
1507 req->FileInfoClass = info_class;
1508 req->PersistentFileId = persistent_fid;
1509 req->VolatileFileId = volatile_fid;
1510 /* 4 for rfc1002 length field and 1 for Buffer */
1511 req->InputBufferOffset =
1512 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
1513 req->OutputBufferLength = cpu_to_le32(output_len);
1515 iov[0].iov_base = (char *)req;
1516 /* 4 for rfc1002 length field */
1517 iov[0].iov_len = get_rfc1002_length(req) + 4;
1519 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1520 rsp = (struct smb2_query_info_rsp *)iov[0].iov_base;
1523 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
1527 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
1528 le32_to_cpu(rsp->OutputBufferLength),
1529 &rsp->hdr, min_len, data);
1532 free_rsp_buf(resp_buftype, rsp);
1537 SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
1538 u64 persistent_fid, u64 volatile_fid,
1539 struct smb2_file_all_info *data)
1541 return query_info(xid, tcon, persistent_fid, volatile_fid,
1542 FILE_ALL_INFORMATION,
1543 sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
1544 sizeof(struct smb2_file_all_info), data);
1548 SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
1549 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
1551 return query_info(xid, tcon, persistent_fid, volatile_fid,
1552 FILE_INTERNAL_INFORMATION,
1553 sizeof(struct smb2_file_internal_info),
1554 sizeof(struct smb2_file_internal_info), uniqueid);
1558 * This is a no-op for now. We're not really interested in the reply, but
1559 * rather in the fact that the server sent one and that server->lstrp
1562 * FIXME: maybe we should consider checking that the reply matches request?
1565 smb2_echo_callback(struct mid_q_entry *mid)
1567 struct TCP_Server_Info *server = mid->callback_data;
1568 struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf;
1569 unsigned int credits_received = 1;
1571 if (mid->mid_state == MID_RESPONSE_RECEIVED)
1572 credits_received = le16_to_cpu(smb2->hdr.CreditRequest);
1574 DeleteMidQEntry(mid);
1575 add_credits(server, credits_received, CIFS_ECHO_OP);
1579 SMB2_echo(struct TCP_Server_Info *server)
1581 struct smb2_echo_req *req;
1584 struct smb_rqst rqst = { .rq_iov = &iov,
1587 cifs_dbg(FYI, "In echo request\n");
1589 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
1593 req->hdr.CreditRequest = cpu_to_le16(1);
1595 iov.iov_base = (char *)req;
1596 /* 4 for rfc1002 length field */
1597 iov.iov_len = get_rfc1002_length(req) + 4;
1599 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server,
1602 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
1604 cifs_small_buf_release(req);
1609 SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1612 struct smb2_flush_req *req;
1613 struct TCP_Server_Info *server;
1614 struct cifs_ses *ses = tcon->ses;
1619 cifs_dbg(FYI, "Flush\n");
1621 if (ses && (ses->server))
1622 server = ses->server;
1626 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
1630 req->PersistentFileId = persistent_fid;
1631 req->VolatileFileId = volatile_fid;
1633 iov[0].iov_base = (char *)req;
1634 /* 4 for rfc1002 length field */
1635 iov[0].iov_len = get_rfc1002_length(req) + 4;
1637 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1639 if ((rc != 0) && tcon)
1640 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
1642 free_rsp_buf(resp_buftype, iov[0].iov_base);
1647 * To form a chain of read requests, any read requests after the first should
1648 * have the end_of_chain boolean set to true.
1651 smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms,
1652 unsigned int remaining_bytes, int request_type)
1655 struct smb2_read_req *req = NULL;
1657 rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req);
1660 if (io_parms->tcon->ses->server == NULL)
1661 return -ECONNABORTED;
1663 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1665 req->PersistentFileId = io_parms->persistent_fid;
1666 req->VolatileFileId = io_parms->volatile_fid;
1667 req->ReadChannelInfoOffset = 0; /* reserved */
1668 req->ReadChannelInfoLength = 0; /* reserved */
1669 req->Channel = 0; /* reserved */
1670 req->MinimumCount = 0;
1671 req->Length = cpu_to_le32(io_parms->length);
1672 req->Offset = cpu_to_le64(io_parms->offset);
1674 if (request_type & CHAINED_REQUEST) {
1675 if (!(request_type & END_OF_CHAIN)) {
1676 /* 4 for rfc1002 length field */
1677 req->hdr.NextCommand =
1678 cpu_to_le32(get_rfc1002_length(req) + 4);
1679 } else /* END_OF_CHAIN */
1680 req->hdr.NextCommand = 0;
1681 if (request_type & RELATED_REQUEST) {
1682 req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
1684 * Related requests use info from previous read request
1687 req->hdr.SessionId = 0xFFFFFFFF;
1688 req->hdr.TreeId = 0xFFFFFFFF;
1689 req->PersistentFileId = 0xFFFFFFFF;
1690 req->VolatileFileId = 0xFFFFFFFF;
1693 if (remaining_bytes > io_parms->length)
1694 req->RemainingBytes = cpu_to_le32(remaining_bytes);
1696 req->RemainingBytes = 0;
1698 iov[0].iov_base = (char *)req;
1699 /* 4 for rfc1002 length field */
1700 iov[0].iov_len = get_rfc1002_length(req) + 4;
1705 smb2_readv_callback(struct mid_q_entry *mid)
1707 struct cifs_readdata *rdata = mid->callback_data;
1708 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
1709 struct TCP_Server_Info *server = tcon->ses->server;
1710 struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base;
1711 unsigned int credits_received = 1;
1712 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
1714 .rq_pages = rdata->pages,
1715 .rq_npages = rdata->nr_pages,
1716 .rq_pagesz = rdata->pagesz,
1717 .rq_tailsz = rdata->tailsz };
1719 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1720 __func__, mid->mid, mid->mid_state, rdata->result,
1723 switch (mid->mid_state) {
1724 case MID_RESPONSE_RECEIVED:
1725 credits_received = le16_to_cpu(buf->CreditRequest);
1726 /* result already set, check signature */
1730 rc = smb2_verify_signature(&rqst, server);
1732 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
1735 /* FIXME: should this be counted toward the initiating task? */
1736 task_io_account_read(rdata->bytes);
1737 cifs_stats_bytes_read(tcon, rdata->bytes);
1739 case MID_REQUEST_SUBMITTED:
1740 case MID_RETRY_NEEDED:
1741 rdata->result = -EAGAIN;
1744 if (rdata->result != -ENODATA)
1745 rdata->result = -EIO;
1749 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
1751 queue_work(cifsiod_wq, &rdata->work);
1752 DeleteMidQEntry(mid);
1753 add_credits(server, credits_received, 0);
1756 /* smb2_async_readv - send an async write, and set up mid to handle result */
1758 smb2_async_readv(struct cifs_readdata *rdata)
1761 struct smb2_hdr *buf;
1762 struct cifs_io_parms io_parms;
1763 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
1766 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
1767 __func__, rdata->offset, rdata->bytes);
1769 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
1770 io_parms.offset = rdata->offset;
1771 io_parms.length = rdata->bytes;
1772 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
1773 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
1774 io_parms.pid = rdata->pid;
1775 rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0);
1779 buf = (struct smb2_hdr *)rdata->iov.iov_base;
1780 /* 4 for rfc1002 length field */
1781 rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4;
1783 kref_get(&rdata->refcount);
1784 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
1785 cifs_readv_receive, smb2_readv_callback,
1788 kref_put(&rdata->refcount, cifs_readdata_release);
1789 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
1792 cifs_small_buf_release(buf);
1797 SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
1798 unsigned int *nbytes, char **buf, int *buf_type)
1800 int resp_buftype, rc = -EACCES;
1801 struct smb2_read_rsp *rsp = NULL;
1805 rc = smb2_new_read_req(iov, io_parms, 0, 0);
1809 rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1,
1810 &resp_buftype, CIFS_LOG_ERROR);
1812 rsp = (struct smb2_read_rsp *)iov[0].iov_base;
1814 if (rsp->hdr.Status == STATUS_END_OF_FILE) {
1815 free_rsp_buf(resp_buftype, iov[0].iov_base);
1820 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
1821 cifs_dbg(VFS, "Send error in read = %d\n", rc);
1823 *nbytes = le32_to_cpu(rsp->DataLength);
1824 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
1825 (*nbytes > io_parms->length)) {
1826 cifs_dbg(FYI, "bad length %d for count %d\n",
1827 *nbytes, io_parms->length);
1834 memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset,
1836 free_rsp_buf(resp_buftype, iov[0].iov_base);
1837 } else if (resp_buftype != CIFS_NO_BUFFER) {
1838 *buf = iov[0].iov_base;
1839 if (resp_buftype == CIFS_SMALL_BUFFER)
1840 *buf_type = CIFS_SMALL_BUFFER;
1841 else if (resp_buftype == CIFS_LARGE_BUFFER)
1842 *buf_type = CIFS_LARGE_BUFFER;
1848 * Check the mid_state and signature on received buffer (if any), and queue the
1849 * workqueue completion task.
1852 smb2_writev_callback(struct mid_q_entry *mid)
1854 struct cifs_writedata *wdata = mid->callback_data;
1855 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1856 unsigned int written;
1857 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
1858 unsigned int credits_received = 1;
1860 switch (mid->mid_state) {
1861 case MID_RESPONSE_RECEIVED:
1862 credits_received = le16_to_cpu(rsp->hdr.CreditRequest);
1863 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
1864 if (wdata->result != 0)
1867 written = le32_to_cpu(rsp->DataLength);
1869 * Mask off high 16 bits when bytes written as returned
1870 * by the server is greater than bytes requested by the
1871 * client. OS/2 servers are known to set incorrect
1874 if (written > wdata->bytes)
1877 if (written < wdata->bytes)
1878 wdata->result = -ENOSPC;
1880 wdata->bytes = written;
1882 case MID_REQUEST_SUBMITTED:
1883 case MID_RETRY_NEEDED:
1884 wdata->result = -EAGAIN;
1887 wdata->result = -EIO;
1892 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1894 queue_work(cifsiod_wq, &wdata->work);
1895 DeleteMidQEntry(mid);
1896 add_credits(tcon->ses->server, credits_received, 0);
1899 /* smb2_async_writev - send an async write, and set up mid to handle result */
1901 smb2_async_writev(struct cifs_writedata *wdata,
1902 void (*release)(struct kref *kref))
1905 struct smb2_write_req *req = NULL;
1906 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1908 struct smb_rqst rqst;
1910 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
1912 goto async_writev_out;
1914 req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid);
1916 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
1917 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
1918 req->WriteChannelInfoOffset = 0;
1919 req->WriteChannelInfoLength = 0;
1921 req->Offset = cpu_to_le64(wdata->offset);
1922 /* 4 for rfc1002 length field */
1923 req->DataOffset = cpu_to_le16(
1924 offsetof(struct smb2_write_req, Buffer) - 4);
1925 req->RemainingBytes = 0;
1927 /* 4 for rfc1002 length field and 1 for Buffer */
1928 iov.iov_len = get_rfc1002_length(req) + 4 - 1;
1933 rqst.rq_pages = wdata->pages;
1934 rqst.rq_npages = wdata->nr_pages;
1935 rqst.rq_pagesz = wdata->pagesz;
1936 rqst.rq_tailsz = wdata->tailsz;
1938 cifs_dbg(FYI, "async write at %llu %u bytes\n",
1939 wdata->offset, wdata->bytes);
1941 req->Length = cpu_to_le32(wdata->bytes);
1943 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
1945 kref_get(&wdata->refcount);
1946 rc = cifs_call_async(tcon->ses->server, &rqst, NULL,
1947 smb2_writev_callback, wdata, 0);
1950 kref_put(&wdata->refcount, release);
1951 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1955 cifs_small_buf_release(req);
1960 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1961 * The length field from io_parms must be at least 1 and indicates a number of
1962 * elements with data to write that begins with position 1 in iov array. All
1963 * data length is specified by count.
1966 SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
1967 unsigned int *nbytes, struct kvec *iov, int n_vec)
1970 struct smb2_write_req *req = NULL;
1971 struct smb2_write_rsp *rsp = NULL;
1978 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
1982 if (io_parms->tcon->ses->server == NULL)
1983 return -ECONNABORTED;
1985 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1987 req->PersistentFileId = io_parms->persistent_fid;
1988 req->VolatileFileId = io_parms->volatile_fid;
1989 req->WriteChannelInfoOffset = 0;
1990 req->WriteChannelInfoLength = 0;
1992 req->Length = cpu_to_le32(io_parms->length);
1993 req->Offset = cpu_to_le64(io_parms->offset);
1994 /* 4 for rfc1002 length field */
1995 req->DataOffset = cpu_to_le16(
1996 offsetof(struct smb2_write_req, Buffer) - 4);
1997 req->RemainingBytes = 0;
1999 iov[0].iov_base = (char *)req;
2000 /* 4 for rfc1002 length field and 1 for Buffer */
2001 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2003 /* length of entire message including data to be written */
2004 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
2006 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
2008 rsp = (struct smb2_write_rsp *)iov[0].iov_base;
2011 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
2012 cifs_dbg(VFS, "Send error in write = %d\n", rc);
2014 *nbytes = le32_to_cpu(rsp->DataLength);
2016 free_rsp_buf(resp_buftype, rsp);
2021 num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
2024 unsigned int entrycount = 0;
2025 unsigned int next_offset = 0;
2026 FILE_DIRECTORY_INFO *entryptr;
2028 if (bufstart == NULL)
2031 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
2034 entryptr = (FILE_DIRECTORY_INFO *)
2035 ((char *)entryptr + next_offset);
2037 if ((char *)entryptr + size > end_of_buf) {
2038 cifs_dbg(VFS, "malformed search entry would overflow\n");
2042 len = le32_to_cpu(entryptr->FileNameLength);
2043 if ((char *)entryptr + len + size > end_of_buf) {
2044 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
2049 *lastentry = (char *)entryptr;
2052 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
2064 SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
2065 u64 persistent_fid, u64 volatile_fid, int index,
2066 struct cifs_search_info *srch_inf)
2068 struct smb2_query_directory_req *req;
2069 struct smb2_query_directory_rsp *rsp = NULL;
2074 unsigned char *bufptr;
2075 struct TCP_Server_Info *server;
2076 struct cifs_ses *ses = tcon->ses;
2077 __le16 asteriks = cpu_to_le16('*');
2079 unsigned int output_size = CIFSMaxBufSize;
2080 size_t info_buf_size;
2082 if (ses && (ses->server))
2083 server = ses->server;
2087 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
2091 switch (srch_inf->info_level) {
2092 case SMB_FIND_FILE_DIRECTORY_INFO:
2093 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
2094 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
2096 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
2097 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
2098 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
2101 cifs_dbg(VFS, "info level %u isn't supported\n",
2102 srch_inf->info_level);
2107 req->FileIndex = cpu_to_le32(index);
2108 req->PersistentFileId = persistent_fid;
2109 req->VolatileFileId = volatile_fid;
2112 bufptr = req->Buffer;
2113 memcpy(bufptr, &asteriks, len);
2115 req->FileNameOffset =
2116 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
2117 req->FileNameLength = cpu_to_le16(len);
2119 * BB could be 30 bytes or so longer if we used SMB2 specific
2120 * buffer lengths, but this is safe and close enough.
2122 output_size = min_t(unsigned int, output_size, server->maxBuf);
2123 output_size = min_t(unsigned int, output_size, 2 << 15);
2124 req->OutputBufferLength = cpu_to_le32(output_size);
2126 iov[0].iov_base = (char *)req;
2127 /* 4 for RFC1001 length and 1 for Buffer */
2128 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2130 iov[1].iov_base = (char *)(req->Buffer);
2131 iov[1].iov_len = len;
2133 inc_rfc1001_len(req, len - 1 /* Buffer */);
2135 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
2136 rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base;
2139 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
2143 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2144 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2149 srch_inf->unicode = true;
2151 if (srch_inf->ntwrk_buf_start) {
2152 if (srch_inf->smallBuf)
2153 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
2155 cifs_buf_release(srch_inf->ntwrk_buf_start);
2157 srch_inf->ntwrk_buf_start = (char *)rsp;
2158 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
2159 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
2160 /* 4 for rfc1002 length field */
2161 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
2162 srch_inf->entries_in_buffer =
2163 num_entries(srch_inf->srch_entries_start, end_of_smb,
2164 &srch_inf->last_entry, info_buf_size);
2165 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
2166 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
2167 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
2168 srch_inf->srch_entries_start, srch_inf->last_entry);
2169 if (resp_buftype == CIFS_LARGE_BUFFER)
2170 srch_inf->smallBuf = false;
2171 else if (resp_buftype == CIFS_SMALL_BUFFER)
2172 srch_inf->smallBuf = true;
2174 cifs_dbg(VFS, "illegal search buffer type\n");
2176 if (rsp->hdr.Status == STATUS_NO_MORE_FILES)
2177 srch_inf->endOfSearch = 1;
2179 srch_inf->endOfSearch = 0;
2184 free_rsp_buf(resp_buftype, rsp);
2189 send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2190 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
2191 unsigned int num, void **data, unsigned int *size)
2193 struct smb2_set_info_req *req;
2194 struct smb2_set_info_rsp *rsp = NULL;
2199 struct TCP_Server_Info *server;
2200 struct cifs_ses *ses = tcon->ses;
2202 if (ses && (ses->server))
2203 server = ses->server;
2210 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
2214 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
2220 req->hdr.ProcessId = cpu_to_le32(pid);
2222 req->InfoType = SMB2_O_INFO_FILE;
2223 req->FileInfoClass = info_class;
2224 req->PersistentFileId = persistent_fid;
2225 req->VolatileFileId = volatile_fid;
2227 /* 4 for RFC1001 length and 1 for Buffer */
2229 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
2230 req->BufferLength = cpu_to_le32(*size);
2232 inc_rfc1001_len(req, *size - 1 /* Buffer */);
2234 memcpy(req->Buffer, *data, *size);
2236 iov[0].iov_base = (char *)req;
2237 /* 4 for RFC1001 length */
2238 iov[0].iov_len = get_rfc1002_length(req) + 4;
2240 for (i = 1; i < num; i++) {
2241 inc_rfc1001_len(req, size[i]);
2242 le32_add_cpu(&req->BufferLength, size[i]);
2243 iov[i].iov_base = (char *)data[i];
2244 iov[i].iov_len = size[i];
2247 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0);
2248 rsp = (struct smb2_set_info_rsp *)iov[0].iov_base;
2251 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
2253 free_rsp_buf(resp_buftype, rsp);
2259 SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
2260 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2262 struct smb2_file_rename_info info;
2264 unsigned int size[2];
2266 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2268 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2272 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
2273 /* 0 = fail if target already exists */
2274 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2275 info.FileNameLength = cpu_to_le32(len);
2278 size[0] = sizeof(struct smb2_file_rename_info);
2280 data[1] = target_file;
2281 size[1] = len + 2 /* null */;
2283 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
2284 current->tgid, FILE_RENAME_INFORMATION, 2, data,
2291 SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
2292 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2294 struct smb2_file_link_info info;
2296 unsigned int size[2];
2298 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2300 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2304 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
2305 /* 0 = fail if link already exists */
2306 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2307 info.FileNameLength = cpu_to_le32(len);
2310 size[0] = sizeof(struct smb2_file_link_info);
2312 data[1] = target_file;
2313 size[1] = len + 2 /* null */;
2315 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
2316 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
2322 SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2323 u64 volatile_fid, u32 pid, __le64 *eof)
2325 struct smb2_file_eof_info info;
2329 info.EndOfFile = *eof;
2332 size = sizeof(struct smb2_file_eof_info);
2334 return send_set_info(xid, tcon, persistent_fid, volatile_fid, pid,
2335 FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
2339 SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2340 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
2343 size = sizeof(FILE_BASIC_INFO);
2344 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2345 current->tgid, FILE_BASIC_INFORMATION, 1,
2346 (void **)&buf, &size);
2350 SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
2351 const u64 persistent_fid, const u64 volatile_fid,
2355 struct smb2_oplock_break *req = NULL;
2357 cifs_dbg(FYI, "SMB2_oplock_break\n");
2358 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2363 req->VolatileFid = volatile_fid;
2364 req->PersistentFid = persistent_fid;
2365 req->OplockLevel = oplock_level;
2366 req->hdr.CreditRequest = cpu_to_le16(1);
2368 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2369 /* SMB2 buffer freed by function above */
2372 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2373 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
2380 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
2381 struct kstatfs *kst)
2383 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
2384 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
2385 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
2386 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
2387 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
2392 build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
2393 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
2396 struct smb2_query_info_req *req;
2398 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
2400 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
2403 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2407 req->InfoType = SMB2_O_INFO_FILESYSTEM;
2408 req->FileInfoClass = level;
2409 req->PersistentFileId = persistent_fid;
2410 req->VolatileFileId = volatile_fid;
2411 /* 4 for rfc1002 length field and 1 for pad */
2412 req->InputBufferOffset =
2413 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
2414 req->OutputBufferLength = cpu_to_le32(
2415 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
2417 iov->iov_base = (char *)req;
2418 /* 4 for rfc1002 length field */
2419 iov->iov_len = get_rfc1002_length(req) + 4;
2424 SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
2425 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
2427 struct smb2_query_info_rsp *rsp = NULL;
2431 struct cifs_ses *ses = tcon->ses;
2432 struct smb2_fs_full_size_info *info = NULL;
2434 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
2435 sizeof(struct smb2_fs_full_size_info),
2436 persistent_fid, volatile_fid);
2440 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2442 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2445 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2447 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
2448 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
2449 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2450 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2451 sizeof(struct smb2_fs_full_size_info));
2453 copy_fs_info_to_kstatfs(info, fsdata);
2456 free_rsp_buf(resp_buftype, iov.iov_base);
2461 SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2462 u64 persistent_fid, u64 volatile_fid, int level)
2464 struct smb2_query_info_rsp *rsp = NULL;
2467 int resp_buftype, max_len, min_len;
2468 struct cifs_ses *ses = tcon->ses;
2469 unsigned int rsp_len, offset;
2471 if (level == FS_DEVICE_INFORMATION) {
2472 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2473 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2474 } else if (level == FS_ATTRIBUTE_INFORMATION) {
2475 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
2476 min_len = MIN_FS_ATTR_INFO_SIZE;
2477 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
2478 max_len = sizeof(struct smb3_fs_ss_info);
2479 min_len = sizeof(struct smb3_fs_ss_info);
2481 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2485 rc = build_qfs_info_req(&iov, tcon, level, max_len,
2486 persistent_fid, volatile_fid);
2490 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2492 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2495 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2497 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
2498 offset = le16_to_cpu(rsp->OutputBufferOffset);
2499 rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
2503 if (level == FS_ATTRIBUTE_INFORMATION)
2504 memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
2505 + (char *)&rsp->hdr, min_t(unsigned int,
2507 else if (level == FS_DEVICE_INFORMATION)
2508 memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
2509 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
2510 else if (level == FS_SECTOR_SIZE_INFORMATION) {
2511 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
2512 (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
2513 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
2514 tcon->perf_sector_size =
2515 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
2519 free_rsp_buf(resp_buftype, iov.iov_base);
2524 smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
2525 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2526 const __u32 num_lock, struct smb2_lock_element *buf)
2529 struct smb2_lock_req *req = NULL;
2534 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
2536 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
2540 req->hdr.ProcessId = cpu_to_le32(pid);
2541 req->LockCount = cpu_to_le16(num_lock);
2543 req->PersistentFileId = persist_fid;
2544 req->VolatileFileId = volatile_fid;
2546 count = num_lock * sizeof(struct smb2_lock_element);
2547 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
2549 iov[0].iov_base = (char *)req;
2550 /* 4 for rfc1002 length field and count for all locks */
2551 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
2552 iov[1].iov_base = (char *)buf;
2553 iov[1].iov_len = count;
2555 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
2556 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP);
2558 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
2559 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
2566 SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
2567 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2568 const __u64 length, const __u64 offset, const __u32 lock_flags,
2571 struct smb2_lock_element lock;
2573 lock.Offset = cpu_to_le64(offset);
2574 lock.Length = cpu_to_le64(length);
2575 lock.Flags = cpu_to_le32(lock_flags);
2576 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
2577 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
2579 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
2583 SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
2584 __u8 *lease_key, const __le32 lease_state)
2587 struct smb2_lease_ack *req = NULL;
2589 cifs_dbg(FYI, "SMB2_lease_break\n");
2590 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2595 req->hdr.CreditRequest = cpu_to_le16(1);
2596 req->StructureSize = cpu_to_le16(36);
2597 inc_rfc1001_len(req, 12);
2599 memcpy(req->LeaseKey, lease_key, 16);
2600 req->LeaseState = lease_state;
2602 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2603 /* SMB2 buffer freed by function above */
2606 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2607 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);