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 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
112 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
114 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
115 hdr->CreditCharge = cpu_to_le16(1);
116 /* else CreditCharge MBZ */
118 hdr->TreeId = tcon->tid;
119 /* Uid is not converted */
121 hdr->SessionId = tcon->ses->Suid;
124 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
125 * to pass the path on the Open SMB prefixed by \\server\share.
126 * Not sure when we would need to do the augmented path (if ever) and
127 * setting this flag breaks the SMB2 open operation since it is
128 * illegal to send an empty path name (without \\server\share prefix)
129 * when the DFS flag is set in the SMB open header. We could
130 * consider setting the flag on all operations other than open
131 * but it is safer to net set it for now.
133 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
134 hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
136 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign)
137 hdr->Flags |= SMB2_FLAGS_SIGNED;
139 pdu->StructureSize2 = cpu_to_le16(parmsize);
144 smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
147 struct nls_table *nls_codepage;
148 struct cifs_ses *ses;
149 struct TCP_Server_Info *server;
152 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
153 * check for tcp and smb session status done differently
154 * for those three - in the calling routine.
159 if (smb2_command == SMB2_TREE_CONNECT)
162 if (tcon->tidStatus == CifsExiting) {
164 * only tree disconnect, open, and write,
165 * (and ulogoff which does not have tcon)
166 * are allowed as we start force umount.
168 if ((smb2_command != SMB2_WRITE) &&
169 (smb2_command != SMB2_CREATE) &&
170 (smb2_command != SMB2_TREE_DISCONNECT)) {
171 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
176 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
177 (!tcon->ses->server))
181 server = ses->server;
184 * Give demultiplex thread up to 10 seconds to reconnect, should be
185 * greater than cifs socket timeout which is 7 seconds
187 while (server->tcpStatus == CifsNeedReconnect) {
189 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
190 * here since they are implicitly done when session drops.
192 switch (smb2_command) {
194 * BB Should we keep oplock break and add flush to exceptions?
196 case SMB2_TREE_DISCONNECT:
199 case SMB2_OPLOCK_BREAK:
203 wait_event_interruptible_timeout(server->response_q,
204 (server->tcpStatus != CifsNeedReconnect), 10 * HZ);
206 /* are we still trying to reconnect? */
207 if (server->tcpStatus != CifsNeedReconnect)
211 * on "soft" mounts we wait once. Hard mounts keep
212 * retrying until process is killed or server comes
216 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
221 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
224 nls_codepage = load_nls_default();
227 * need to prevent multiple threads trying to simultaneously reconnect
228 * the same SMB session
230 mutex_lock(&tcon->ses->session_mutex);
231 rc = cifs_negotiate_protocol(0, tcon->ses);
232 if (!rc && tcon->ses->need_reconnect)
233 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
235 if (rc || !tcon->need_reconnect) {
236 mutex_unlock(&tcon->ses->session_mutex);
240 cifs_mark_open_files_invalid(tcon);
241 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
242 mutex_unlock(&tcon->ses->session_mutex);
243 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
246 atomic_inc(&tconInfoReconnectCount);
249 * Check if handle based operation so we know whether we can continue
250 * or not without returning to caller to reset file handle.
253 * BB Is flush done by server on drop of tcp session? Should we special
254 * case it and skip above?
256 switch (smb2_command) {
262 case SMB2_QUERY_DIRECTORY:
263 case SMB2_CHANGE_NOTIFY:
264 case SMB2_QUERY_INFO:
268 unload_nls(nls_codepage);
273 * Allocate and return pointer to an SMB request hdr, and set basic
274 * SMB information in the SMB header. If the return code is zero, this
275 * function must have filled in request_buf pointer.
278 small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
283 rc = smb2_reconnect(smb2_command, tcon);
287 /* BB eventually switch this to SMB2 specific small buf size */
288 *request_buf = cifs_small_buf_get();
289 if (*request_buf == NULL) {
290 /* BB should we add a retry in here if not a writepage? */
294 smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon);
297 #ifdef CONFIG_CIFS_STATS2
298 uint16_t com_code = le16_to_cpu(smb2_command);
299 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
301 cifs_stats_inc(&tcon->num_smbs_sent);
309 * SMB2 Worker functions follow:
311 * The general structure of the worker functions is:
312 * 1) Call smb2_init (assembles SMB2 header)
313 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
314 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
315 * 4) Decode SMB2 command specific fields in the fixed length area
316 * 5) Decode variable length data area (if any for this SMB2 command type)
317 * 6) Call free smb buffer
323 SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
325 struct smb2_negotiate_req *req;
326 struct smb2_negotiate_rsp *rsp;
330 struct TCP_Server_Info *server = ses->server;
331 int blob_offset, blob_length;
333 int flags = CIFS_NEG_OP;
335 cifs_dbg(FYI, "Negotiate protocol\n");
338 WARN(1, "%s: server is NULL!\n", __func__);
342 rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
346 req->hdr.SessionId = 0;
348 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
350 req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */
351 inc_rfc1001_len(req, 2);
353 /* only one of SMB2 signing flags may be set in SMB2 request */
355 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
356 else if (global_secflags & CIFSSEC_MAY_SIGN)
357 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
359 req->SecurityMode = 0;
361 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
363 /* ClientGUID must be zero for SMB2.02 dialect */
364 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
365 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
367 memcpy(req->ClientGUID, server->client_guid,
368 SMB2_CLIENT_GUID_SIZE);
370 iov[0].iov_base = (char *)req;
371 /* 4 for rfc1002 length field */
372 iov[0].iov_len = get_rfc1002_length(req) + 4;
374 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags);
376 rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base;
378 * No tcon so can't do
379 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
384 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
386 /* BB we may eventually want to match the negotiated vs. requested
387 dialect, even though we are only requesting one at a time */
388 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
389 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
390 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
391 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
392 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
393 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
394 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
395 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
397 cifs_dbg(VFS, "Illegal dialect returned by server %d\n",
398 le16_to_cpu(rsp->DialectRevision));
402 server->dialect = le16_to_cpu(rsp->DialectRevision);
404 /* SMB2 only has an extended negflavor */
405 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
406 /* set it to the maximum buffer size value we can send with 1 credit */
407 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
408 SMB2_MAX_BUFFER_SIZE);
409 server->max_read = le32_to_cpu(rsp->MaxReadSize);
410 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
411 /* BB Do we need to validate the SecurityMode? */
412 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
413 server->capabilities = le32_to_cpu(rsp->Capabilities);
415 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
417 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
420 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
422 * ses->sectype = RawNTLMSSP;
423 * but for time being this is our only auth choice so doesn't matter.
424 * We just found a server which sets blob length to zero expecting raw.
426 if (blob_length == 0)
427 cifs_dbg(FYI, "missing security blob on negprot\n");
429 rc = cifs_enable_signing(server, ses->sign);
430 #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
434 rc = decode_neg_token_init(security_blob, blob_length,
445 free_rsp_buf(resp_buftype, rsp);
449 int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
452 struct validate_negotiate_info_req vneg_inbuf;
453 struct validate_negotiate_info_rsp *pneg_rsp;
456 cifs_dbg(FYI, "validate negotiate\n");
459 * validation ioctl must be signed, so no point sending this if we
460 * can not sign it. We could eventually change this to selectively
461 * sign just this, the first and only signed request on a connection.
462 * This is good enough for now since a user who wants better security
463 * would also enable signing on the mount. Having validation of
464 * negotiate info for signed connections helps reduce attack vectors
466 if (tcon->ses->server->sign == false)
467 return 0; /* validation requires signing */
469 vneg_inbuf.Capabilities =
470 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
471 memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid,
472 SMB2_CLIENT_GUID_SIZE);
475 vneg_inbuf.SecurityMode =
476 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
477 else if (global_secflags & CIFSSEC_MAY_SIGN)
478 vneg_inbuf.SecurityMode =
479 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
481 vneg_inbuf.SecurityMode = 0;
483 vneg_inbuf.DialectCount = cpu_to_le16(1);
484 vneg_inbuf.Dialects[0] =
485 cpu_to_le16(tcon->ses->server->vals->protocol_id);
487 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
488 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
489 (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
490 (char **)&pneg_rsp, &rsplen);
493 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
497 if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
498 cifs_dbg(VFS, "invalid size of protocol negotiate response\n");
502 /* check validate negotiate info response matches what we got earlier */
503 if (pneg_rsp->Dialect !=
504 cpu_to_le16(tcon->ses->server->vals->protocol_id))
507 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
510 /* do not validate server guid because not saved at negprot time yet */
512 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
513 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
516 /* validate negotiate successful */
517 cifs_dbg(FYI, "validate negotiate info successful\n");
521 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
526 SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
527 const struct nls_table *nls_cp)
529 struct smb2_sess_setup_req *req;
530 struct smb2_sess_setup_rsp *rsp = NULL;
534 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
535 struct TCP_Server_Info *server = ses->server;
538 char *ntlmssp_blob = NULL;
539 bool use_spnego = false; /* else use raw ntlmssp */
541 cifs_dbg(FYI, "Session Setup\n");
544 WARN(1, "%s: server is NULL!\n", __func__);
549 * If we are here due to reconnect, free per-smb session key
550 * in case signing was required.
552 kfree(ses->auth_key.response);
553 ses->auth_key.response = NULL;
556 * If memory allocation is successful, caller of this function
559 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
562 ses->ntlmssp->sesskey_per_smbsess = true;
564 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
565 ses->sectype = RawNTLMSSP;
567 ssetup_ntlmssp_authenticate:
568 if (phase == NtLmChallenge)
569 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
571 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
575 req->hdr.SessionId = 0; /* First session, not a reauthenticate */
576 req->VcNumber = 0; /* MBZ */
577 /* to enable echos and oplocks */
578 req->hdr.CreditRequest = cpu_to_le16(3);
580 /* only one of SMB2 signing flags may be set in SMB2 request */
582 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
583 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
584 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
586 req->SecurityMode = 0;
588 req->Capabilities = 0;
589 req->Channel = 0; /* MBZ */
591 iov[0].iov_base = (char *)req;
592 /* 4 for rfc1002 length field and 1 for pad */
593 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
594 if (phase == NtLmNegotiate) {
595 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
597 if (ntlmssp_blob == NULL) {
601 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
603 /* blob_length = build_spnego_ntlmssp_blob(
605 sizeof(struct _NEGOTIATE_MESSAGE),
607 /* BB eventually need to add this */
608 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
613 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
614 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
615 security_blob = ntlmssp_blob;
617 } else if (phase == NtLmAuthenticate) {
618 req->hdr.SessionId = ses->Suid;
619 ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500,
621 if (ntlmssp_blob == NULL) {
625 rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses,
628 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n",
630 goto ssetup_exit; /* BB double check error handling */
633 /* blob_length = build_spnego_ntlmssp_blob(
637 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
642 security_blob = ntlmssp_blob;
645 cifs_dbg(VFS, "illegal ntlmssp phase\n");
650 /* Testing shows that buffer offset must be at location of Buffer[0] */
651 req->SecurityBufferOffset =
652 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
653 1 /* pad */ - 4 /* rfc1001 len */);
654 req->SecurityBufferLength = cpu_to_le16(blob_length);
655 iov[1].iov_base = security_blob;
656 iov[1].iov_len = blob_length;
658 inc_rfc1001_len(req, blob_length - 1 /* pad */);
660 /* BB add code to build os and lm fields */
662 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype,
663 CIFS_LOG_ERROR | CIFS_NEG_OP);
665 kfree(security_blob);
666 rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base;
667 if (resp_buftype != CIFS_NO_BUFFER &&
668 rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) {
669 if (phase != NtLmNegotiate) {
670 cifs_dbg(VFS, "Unexpected more processing error\n");
673 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
674 le16_to_cpu(rsp->SecurityBufferOffset)) {
675 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
676 le16_to_cpu(rsp->SecurityBufferOffset));
681 /* NTLMSSP Negotiate sent now processing challenge (response) */
682 phase = NtLmChallenge; /* process ntlmssp challenge */
683 rc = 0; /* MORE_PROCESSING is not an error here but expected */
684 ses->Suid = rsp->hdr.SessionId;
685 rc = decode_ntlmssp_challenge(rsp->Buffer,
686 le16_to_cpu(rsp->SecurityBufferLength), ses);
690 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
691 * but at least the raw NTLMSSP case works.
694 * No tcon so can't do
695 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
700 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
701 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
702 cifs_dbg(VFS, "SMB3 encryption not supported yet\n");
704 free_rsp_buf(resp_buftype, rsp);
706 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
707 if ((phase == NtLmChallenge) && (rc == 0))
708 goto ssetup_ntlmssp_authenticate;
711 mutex_lock(&server->srv_mutex);
712 if (server->sign && server->ops->generate_signingkey) {
713 rc = server->ops->generate_signingkey(ses);
714 kfree(ses->auth_key.response);
715 ses->auth_key.response = NULL;
718 "SMB3 session key generation failed\n");
719 mutex_unlock(&server->srv_mutex);
723 if (!server->session_estab) {
724 server->sequence_number = 0x2;
725 server->session_estab = true;
727 mutex_unlock(&server->srv_mutex);
729 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
730 spin_lock(&GlobalMid_Lock);
731 ses->status = CifsGood;
732 ses->need_reconnect = false;
733 spin_unlock(&GlobalMid_Lock);
738 kfree(ses->auth_key.response);
739 ses->auth_key.response = NULL;
747 SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
749 struct smb2_logoff_req *req; /* response is also trivial struct */
751 struct TCP_Server_Info *server;
753 cifs_dbg(FYI, "disconnect session %p\n", ses);
755 if (ses && (ses->server))
756 server = ses->server;
760 /* no need to send SMB logoff if uid already closed due to reconnect */
761 if (ses->need_reconnect)
762 goto smb2_session_already_dead;
764 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
768 /* since no tcon, smb2_init can not do this, so do here */
769 req->hdr.SessionId = ses->Suid;
771 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
773 rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0);
775 * No tcon so can't do
776 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
779 smb2_session_already_dead:
783 static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
785 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
788 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
790 /* These are similar values to what Windows uses */
791 static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
793 tcon->max_chunks = 256;
794 tcon->max_bytes_chunk = 1048576;
795 tcon->max_bytes_copy = 16777216;
799 SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
800 struct cifs_tcon *tcon, const struct nls_table *cp)
802 struct smb2_tree_connect_req *req;
803 struct smb2_tree_connect_rsp *rsp = NULL;
808 struct TCP_Server_Info *server;
809 __le16 *unc_path = NULL;
811 cifs_dbg(FYI, "TCON\n");
813 if ((ses->server) && tree)
814 server = ses->server;
818 if (tcon && tcon->bad_network_name)
821 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
822 if (unc_path == NULL)
825 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
827 if (unc_path_len < 2) {
832 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
839 /* since no tcon, smb2_init can not do this, so do here */
840 req->hdr.SessionId = ses->Suid;
841 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
842 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
845 iov[0].iov_base = (char *)req;
846 /* 4 for rfc1002 length field and 1 for pad */
847 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
849 /* Testing shows that buffer offset must be at location of Buffer[0] */
850 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
851 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
852 req->PathLength = cpu_to_le16(unc_path_len - 2);
853 iov[1].iov_base = unc_path;
854 iov[1].iov_len = unc_path_len;
856 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
858 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
859 rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base;
863 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
864 tcon->need_reconnect = true;
866 goto tcon_error_exit;
870 ses->ipc_tid = rsp->hdr.TreeId;
874 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
875 cifs_dbg(FYI, "connection to disk share\n");
876 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
878 cifs_dbg(FYI, "connection to pipe share\n");
879 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
881 cifs_dbg(FYI, "connection to printer\n");
883 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
885 goto tcon_error_exit;
888 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
889 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
890 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
891 tcon->tidStatus = CifsGood;
892 tcon->need_reconnect = false;
893 tcon->tid = rsp->hdr.TreeId;
894 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
896 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
897 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
898 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
899 init_copy_chunk_defaults(tcon);
900 if (tcon->ses->server->ops->validate_negotiate)
901 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
903 free_rsp_buf(resp_buftype, rsp);
908 if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) {
909 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
911 tcon->bad_network_name = true;
917 SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
919 struct smb2_tree_disconnect_req *req; /* response is trivial */
921 struct TCP_Server_Info *server;
922 struct cifs_ses *ses = tcon->ses;
924 cifs_dbg(FYI, "Tree Disconnect\n");
926 if (ses && (ses->server))
927 server = ses->server;
931 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
934 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
938 rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0);
940 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
946 static struct create_durable *
947 create_durable_buf(void)
949 struct create_durable *buf;
951 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
955 buf->ccontext.DataOffset = cpu_to_le16(offsetof
956 (struct create_durable, Data));
957 buf->ccontext.DataLength = cpu_to_le32(16);
958 buf->ccontext.NameOffset = cpu_to_le16(offsetof
959 (struct create_durable, Name));
960 buf->ccontext.NameLength = cpu_to_le16(4);
961 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
969 static struct create_durable *
970 create_reconnect_durable_buf(struct cifs_fid *fid)
972 struct create_durable *buf;
974 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
978 buf->ccontext.DataOffset = cpu_to_le16(offsetof
979 (struct create_durable, Data));
980 buf->ccontext.DataLength = cpu_to_le32(16);
981 buf->ccontext.NameOffset = cpu_to_le16(offsetof
982 (struct create_durable, Name));
983 buf->ccontext.NameLength = cpu_to_le16(4);
984 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
985 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
986 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
995 parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
999 struct create_context *cc;
1000 unsigned int next = 0;
1003 data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
1004 cc = (struct create_context *)data_offset;
1006 cc = (struct create_context *)((char *)cc + next);
1007 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
1008 if (le16_to_cpu(cc->NameLength) != 4 ||
1009 strncmp(name, "RqLs", 4)) {
1010 next = le32_to_cpu(cc->Next);
1013 return server->ops->parse_lease_buf(cc, epoch);
1014 } while (next != 0);
1020 add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1021 unsigned int *num_iovec, __u8 *oplock)
1023 struct smb2_create_req *req = iov[0].iov_base;
1024 unsigned int num = *num_iovec;
1026 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
1027 if (iov[num].iov_base == NULL)
1029 iov[num].iov_len = server->vals->create_lease_size;
1030 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1031 if (!req->CreateContextsOffset)
1032 req->CreateContextsOffset = cpu_to_le32(
1033 sizeof(struct smb2_create_req) - 4 +
1034 iov[num - 1].iov_len);
1035 le32_add_cpu(&req->CreateContextsLength,
1036 server->vals->create_lease_size);
1037 inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
1038 *num_iovec = num + 1;
1043 add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1044 struct cifs_open_parms *oparms)
1046 struct smb2_create_req *req = iov[0].iov_base;
1047 unsigned int num = *num_iovec;
1049 if (oparms->reconnect) {
1050 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1051 /* indicate that we don't need to relock the file */
1052 oparms->reconnect = false;
1054 iov[num].iov_base = create_durable_buf();
1055 if (iov[num].iov_base == NULL)
1057 iov[num].iov_len = sizeof(struct create_durable);
1058 if (!req->CreateContextsOffset)
1059 req->CreateContextsOffset =
1060 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1062 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
1063 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
1064 *num_iovec = num + 1;
1069 SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
1070 __u8 *oplock, struct smb2_file_all_info *buf,
1071 struct smb2_err_rsp **err_buf)
1073 struct smb2_create_req *req;
1074 struct smb2_create_rsp *rsp;
1075 struct TCP_Server_Info *server;
1076 struct cifs_tcon *tcon = oparms->tcon;
1077 struct cifs_ses *ses = tcon->ses;
1081 __le16 *copy_path = NULL;
1084 unsigned int num_iovecs = 2;
1085 __u32 file_attributes = 0;
1086 char *dhc_buf = NULL, *lc_buf = NULL;
1088 cifs_dbg(FYI, "create/open\n");
1090 if (ses && (ses->server))
1091 server = ses->server;
1095 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
1099 if (oparms->create_options & CREATE_OPTION_READONLY)
1100 file_attributes |= ATTR_READONLY;
1102 req->ImpersonationLevel = IL_IMPERSONATION;
1103 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
1104 /* File attributes ignored on open (used in create though) */
1105 req->FileAttributes = cpu_to_le32(file_attributes);
1106 req->ShareAccess = FILE_SHARE_ALL_LE;
1107 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1108 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
1109 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
1110 /* do not count rfc1001 len field */
1111 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
1113 iov[0].iov_base = (char *)req;
1114 /* 4 for rfc1002 length field */
1115 iov[0].iov_len = get_rfc1002_length(req) + 4;
1117 /* MUST set path len (NameLength) to 0 opening root of share */
1118 req->NameLength = cpu_to_le16(uni_path_len - 2);
1119 /* -1 since last byte is buf[0] which is sent below (path) */
1121 if (uni_path_len % 8 != 0) {
1122 copy_size = uni_path_len / 8 * 8;
1123 if (copy_size < uni_path_len)
1126 copy_path = kzalloc(copy_size, GFP_KERNEL);
1129 memcpy((char *)copy_path, (const char *)path,
1131 uni_path_len = copy_size;
1135 iov[1].iov_len = uni_path_len;
1136 iov[1].iov_base = path;
1137 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1138 inc_rfc1001_len(req, uni_path_len - 1);
1140 if (!server->oplocks)
1141 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1143 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
1144 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1145 req->RequestedOplockLevel = *oplock;
1147 rc = add_lease_context(server, iov, &num_iovecs, oplock);
1149 cifs_small_buf_release(req);
1153 lc_buf = iov[num_iovecs-1].iov_base;
1156 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1157 /* need to set Next field of lease context if we request it */
1158 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
1159 struct create_context *ccontext =
1160 (struct create_context *)iov[num_iovecs-1].iov_base;
1162 cpu_to_le32(server->vals->create_lease_size);
1164 rc = add_durable_context(iov, &num_iovecs, oparms);
1166 cifs_small_buf_release(req);
1171 dhc_buf = iov[num_iovecs-1].iov_base;
1174 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1175 rsp = (struct smb2_create_rsp *)iov[0].iov_base;
1178 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
1180 *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
1185 oparms->fid->persistent_fid = rsp->PersistentFileId;
1186 oparms->fid->volatile_fid = rsp->VolatileFileId;
1189 memcpy(buf, &rsp->CreationTime, 32);
1190 buf->AllocationSize = rsp->AllocationSize;
1191 buf->EndOfFile = rsp->EndofFile;
1192 buf->Attributes = rsp->FileAttributes;
1193 buf->NumberOfLinks = cpu_to_le32(1);
1194 buf->DeletePending = 0;
1197 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
1198 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
1200 *oplock = rsp->OplockLevel;
1205 free_rsp_buf(resp_buftype, rsp);
1210 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1213 SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1214 u64 volatile_fid, u32 opcode, bool is_fsctl, char *in_data,
1215 u32 indatalen, char **out_data, u32 *plen /* returned data len */)
1217 struct smb2_ioctl_req *req;
1218 struct smb2_ioctl_rsp *rsp;
1219 struct TCP_Server_Info *server;
1220 struct cifs_ses *ses = tcon->ses;
1226 cifs_dbg(FYI, "SMB2 IOCTL\n");
1228 if (out_data != NULL)
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->got_bytes);
1730 cifs_stats_bytes_read(tcon, rdata->got_bytes);
1732 case MID_REQUEST_SUBMITTED:
1733 case MID_RETRY_NEEDED:
1734 rdata->result = -EAGAIN;
1735 if (server->sign && rdata->got_bytes)
1736 /* reset bytes number since we can not check a sign */
1737 rdata->got_bytes = 0;
1738 /* FIXME: should this be counted toward the initiating task? */
1739 task_io_account_read(rdata->got_bytes);
1740 cifs_stats_bytes_read(tcon, rdata->got_bytes);
1743 if (rdata->result != -ENODATA)
1744 rdata->result = -EIO;
1748 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
1750 queue_work(cifsiod_wq, &rdata->work);
1751 DeleteMidQEntry(mid);
1752 add_credits(server, credits_received, 0);
1755 /* smb2_async_readv - send an async write, and set up mid to handle result */
1757 smb2_async_readv(struct cifs_readdata *rdata)
1760 struct smb2_hdr *buf;
1761 struct cifs_io_parms io_parms;
1762 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
1764 struct TCP_Server_Info *server;
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;
1776 server = io_parms.tcon->ses->server;
1778 rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0);
1780 if (rc == -EAGAIN && rdata->credits) {
1781 /* credits was reset by reconnect */
1783 /* reduce in_flight value since we won't send the req */
1784 spin_lock(&server->req_lock);
1785 server->in_flight--;
1786 spin_unlock(&server->req_lock);
1791 buf = (struct smb2_hdr *)rdata->iov.iov_base;
1792 /* 4 for rfc1002 length field */
1793 rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4;
1795 if (rdata->credits) {
1796 buf->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
1797 SMB2_MAX_BUFFER_SIZE));
1798 spin_lock(&server->req_lock);
1799 server->credits += rdata->credits -
1800 le16_to_cpu(buf->CreditCharge);
1801 spin_unlock(&server->req_lock);
1802 wake_up(&server->request_q);
1803 flags = CIFS_HAS_CREDITS;
1806 kref_get(&rdata->refcount);
1807 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
1808 cifs_readv_receive, smb2_readv_callback,
1811 kref_put(&rdata->refcount, cifs_readdata_release);
1812 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
1815 cifs_small_buf_release(buf);
1820 SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
1821 unsigned int *nbytes, char **buf, int *buf_type)
1823 int resp_buftype, rc = -EACCES;
1824 struct smb2_read_rsp *rsp = NULL;
1828 rc = smb2_new_read_req(iov, io_parms, 0, 0);
1832 rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1,
1833 &resp_buftype, CIFS_LOG_ERROR);
1835 rsp = (struct smb2_read_rsp *)iov[0].iov_base;
1837 if (rsp->hdr.Status == STATUS_END_OF_FILE) {
1838 free_rsp_buf(resp_buftype, iov[0].iov_base);
1843 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
1844 cifs_dbg(VFS, "Send error in read = %d\n", rc);
1846 *nbytes = le32_to_cpu(rsp->DataLength);
1847 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
1848 (*nbytes > io_parms->length)) {
1849 cifs_dbg(FYI, "bad length %d for count %d\n",
1850 *nbytes, io_parms->length);
1857 memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset,
1859 free_rsp_buf(resp_buftype, iov[0].iov_base);
1860 } else if (resp_buftype != CIFS_NO_BUFFER) {
1861 *buf = iov[0].iov_base;
1862 if (resp_buftype == CIFS_SMALL_BUFFER)
1863 *buf_type = CIFS_SMALL_BUFFER;
1864 else if (resp_buftype == CIFS_LARGE_BUFFER)
1865 *buf_type = CIFS_LARGE_BUFFER;
1871 * Check the mid_state and signature on received buffer (if any), and queue the
1872 * workqueue completion task.
1875 smb2_writev_callback(struct mid_q_entry *mid)
1877 struct cifs_writedata *wdata = mid->callback_data;
1878 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1879 unsigned int written;
1880 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
1881 unsigned int credits_received = 1;
1883 switch (mid->mid_state) {
1884 case MID_RESPONSE_RECEIVED:
1885 credits_received = le16_to_cpu(rsp->hdr.CreditRequest);
1886 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
1887 if (wdata->result != 0)
1890 written = le32_to_cpu(rsp->DataLength);
1892 * Mask off high 16 bits when bytes written as returned
1893 * by the server is greater than bytes requested by the
1894 * client. OS/2 servers are known to set incorrect
1897 if (written > wdata->bytes)
1900 if (written < wdata->bytes)
1901 wdata->result = -ENOSPC;
1903 wdata->bytes = written;
1905 case MID_REQUEST_SUBMITTED:
1906 case MID_RETRY_NEEDED:
1907 wdata->result = -EAGAIN;
1910 wdata->result = -EIO;
1915 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1917 queue_work(cifsiod_wq, &wdata->work);
1918 DeleteMidQEntry(mid);
1919 add_credits(tcon->ses->server, credits_received, 0);
1922 /* smb2_async_writev - send an async write, and set up mid to handle result */
1924 smb2_async_writev(struct cifs_writedata *wdata,
1925 void (*release)(struct kref *kref))
1927 int rc = -EACCES, flags = 0;
1928 struct smb2_write_req *req = NULL;
1929 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1930 struct TCP_Server_Info *server = tcon->ses->server;
1932 struct smb_rqst rqst;
1934 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
1936 if (rc == -EAGAIN && wdata->credits) {
1937 /* credits was reset by reconnect */
1939 /* reduce in_flight value since we won't send the req */
1940 spin_lock(&server->req_lock);
1941 server->in_flight--;
1942 spin_unlock(&server->req_lock);
1944 goto async_writev_out;
1947 req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid);
1949 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
1950 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
1951 req->WriteChannelInfoOffset = 0;
1952 req->WriteChannelInfoLength = 0;
1954 req->Offset = cpu_to_le64(wdata->offset);
1955 /* 4 for rfc1002 length field */
1956 req->DataOffset = cpu_to_le16(
1957 offsetof(struct smb2_write_req, Buffer) - 4);
1958 req->RemainingBytes = 0;
1960 /* 4 for rfc1002 length field and 1 for Buffer */
1961 iov.iov_len = get_rfc1002_length(req) + 4 - 1;
1966 rqst.rq_pages = wdata->pages;
1967 rqst.rq_npages = wdata->nr_pages;
1968 rqst.rq_pagesz = wdata->pagesz;
1969 rqst.rq_tailsz = wdata->tailsz;
1971 cifs_dbg(FYI, "async write at %llu %u bytes\n",
1972 wdata->offset, wdata->bytes);
1974 req->Length = cpu_to_le32(wdata->bytes);
1976 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
1978 if (wdata->credits) {
1979 req->hdr.CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
1980 SMB2_MAX_BUFFER_SIZE));
1981 spin_lock(&server->req_lock);
1982 server->credits += wdata->credits -
1983 le16_to_cpu(req->hdr.CreditCharge);
1984 spin_unlock(&server->req_lock);
1985 wake_up(&server->request_q);
1986 flags = CIFS_HAS_CREDITS;
1989 kref_get(&wdata->refcount);
1990 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, wdata,
1994 kref_put(&wdata->refcount, release);
1995 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1999 cifs_small_buf_release(req);
2004 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2005 * The length field from io_parms must be at least 1 and indicates a number of
2006 * elements with data to write that begins with position 1 in iov array. All
2007 * data length is specified by count.
2010 SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
2011 unsigned int *nbytes, struct kvec *iov, int n_vec)
2014 struct smb2_write_req *req = NULL;
2015 struct smb2_write_rsp *rsp = NULL;
2022 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
2026 if (io_parms->tcon->ses->server == NULL)
2027 return -ECONNABORTED;
2029 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
2031 req->PersistentFileId = io_parms->persistent_fid;
2032 req->VolatileFileId = io_parms->volatile_fid;
2033 req->WriteChannelInfoOffset = 0;
2034 req->WriteChannelInfoLength = 0;
2036 req->Length = cpu_to_le32(io_parms->length);
2037 req->Offset = cpu_to_le64(io_parms->offset);
2038 /* 4 for rfc1002 length field */
2039 req->DataOffset = cpu_to_le16(
2040 offsetof(struct smb2_write_req, Buffer) - 4);
2041 req->RemainingBytes = 0;
2043 iov[0].iov_base = (char *)req;
2044 /* 4 for rfc1002 length field and 1 for Buffer */
2045 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2047 /* length of entire message including data to be written */
2048 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
2050 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
2052 rsp = (struct smb2_write_rsp *)iov[0].iov_base;
2055 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
2056 cifs_dbg(VFS, "Send error in write = %d\n", rc);
2058 *nbytes = le32_to_cpu(rsp->DataLength);
2060 free_rsp_buf(resp_buftype, rsp);
2065 num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
2068 unsigned int entrycount = 0;
2069 unsigned int next_offset = 0;
2070 FILE_DIRECTORY_INFO *entryptr;
2072 if (bufstart == NULL)
2075 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
2078 entryptr = (FILE_DIRECTORY_INFO *)
2079 ((char *)entryptr + next_offset);
2081 if ((char *)entryptr + size > end_of_buf) {
2082 cifs_dbg(VFS, "malformed search entry would overflow\n");
2086 len = le32_to_cpu(entryptr->FileNameLength);
2087 if ((char *)entryptr + len + size > end_of_buf) {
2088 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
2093 *lastentry = (char *)entryptr;
2096 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
2108 SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
2109 u64 persistent_fid, u64 volatile_fid, int index,
2110 struct cifs_search_info *srch_inf)
2112 struct smb2_query_directory_req *req;
2113 struct smb2_query_directory_rsp *rsp = NULL;
2118 unsigned char *bufptr;
2119 struct TCP_Server_Info *server;
2120 struct cifs_ses *ses = tcon->ses;
2121 __le16 asteriks = cpu_to_le16('*');
2123 unsigned int output_size = CIFSMaxBufSize;
2124 size_t info_buf_size;
2126 if (ses && (ses->server))
2127 server = ses->server;
2131 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
2135 switch (srch_inf->info_level) {
2136 case SMB_FIND_FILE_DIRECTORY_INFO:
2137 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
2138 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
2140 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
2141 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
2142 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
2145 cifs_dbg(VFS, "info level %u isn't supported\n",
2146 srch_inf->info_level);
2151 req->FileIndex = cpu_to_le32(index);
2152 req->PersistentFileId = persistent_fid;
2153 req->VolatileFileId = volatile_fid;
2156 bufptr = req->Buffer;
2157 memcpy(bufptr, &asteriks, len);
2159 req->FileNameOffset =
2160 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
2161 req->FileNameLength = cpu_to_le16(len);
2163 * BB could be 30 bytes or so longer if we used SMB2 specific
2164 * buffer lengths, but this is safe and close enough.
2166 output_size = min_t(unsigned int, output_size, server->maxBuf);
2167 output_size = min_t(unsigned int, output_size, 2 << 15);
2168 req->OutputBufferLength = cpu_to_le32(output_size);
2170 iov[0].iov_base = (char *)req;
2171 /* 4 for RFC1001 length and 1 for Buffer */
2172 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2174 iov[1].iov_base = (char *)(req->Buffer);
2175 iov[1].iov_len = len;
2177 inc_rfc1001_len(req, len - 1 /* Buffer */);
2179 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
2180 rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base;
2183 if (rc == -ENODATA && rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2184 srch_inf->endOfSearch = true;
2187 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
2191 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2192 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2197 srch_inf->unicode = true;
2199 if (srch_inf->ntwrk_buf_start) {
2200 if (srch_inf->smallBuf)
2201 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
2203 cifs_buf_release(srch_inf->ntwrk_buf_start);
2205 srch_inf->ntwrk_buf_start = (char *)rsp;
2206 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
2207 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
2208 /* 4 for rfc1002 length field */
2209 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
2210 srch_inf->entries_in_buffer =
2211 num_entries(srch_inf->srch_entries_start, end_of_smb,
2212 &srch_inf->last_entry, info_buf_size);
2213 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
2214 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
2215 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
2216 srch_inf->srch_entries_start, srch_inf->last_entry);
2217 if (resp_buftype == CIFS_LARGE_BUFFER)
2218 srch_inf->smallBuf = false;
2219 else if (resp_buftype == CIFS_SMALL_BUFFER)
2220 srch_inf->smallBuf = true;
2222 cifs_dbg(VFS, "illegal search buffer type\n");
2227 free_rsp_buf(resp_buftype, rsp);
2232 send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2233 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
2234 unsigned int num, void **data, unsigned int *size)
2236 struct smb2_set_info_req *req;
2237 struct smb2_set_info_rsp *rsp = NULL;
2242 struct TCP_Server_Info *server;
2243 struct cifs_ses *ses = tcon->ses;
2245 if (ses && (ses->server))
2246 server = ses->server;
2253 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
2257 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
2263 req->hdr.ProcessId = cpu_to_le32(pid);
2265 req->InfoType = SMB2_O_INFO_FILE;
2266 req->FileInfoClass = info_class;
2267 req->PersistentFileId = persistent_fid;
2268 req->VolatileFileId = volatile_fid;
2270 /* 4 for RFC1001 length and 1 for Buffer */
2272 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
2273 req->BufferLength = cpu_to_le32(*size);
2275 inc_rfc1001_len(req, *size - 1 /* Buffer */);
2277 memcpy(req->Buffer, *data, *size);
2279 iov[0].iov_base = (char *)req;
2280 /* 4 for RFC1001 length */
2281 iov[0].iov_len = get_rfc1002_length(req) + 4;
2283 for (i = 1; i < num; i++) {
2284 inc_rfc1001_len(req, size[i]);
2285 le32_add_cpu(&req->BufferLength, size[i]);
2286 iov[i].iov_base = (char *)data[i];
2287 iov[i].iov_len = size[i];
2290 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0);
2291 rsp = (struct smb2_set_info_rsp *)iov[0].iov_base;
2294 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
2296 free_rsp_buf(resp_buftype, rsp);
2302 SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
2303 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2305 struct smb2_file_rename_info info;
2307 unsigned int size[2];
2309 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2311 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2315 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
2316 /* 0 = fail if target already exists */
2317 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2318 info.FileNameLength = cpu_to_le32(len);
2321 size[0] = sizeof(struct smb2_file_rename_info);
2323 data[1] = target_file;
2324 size[1] = len + 2 /* null */;
2326 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
2327 current->tgid, FILE_RENAME_INFORMATION, 2, data,
2334 SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
2335 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2337 struct smb2_file_link_info info;
2339 unsigned int size[2];
2341 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2343 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2347 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
2348 /* 0 = fail if link already exists */
2349 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2350 info.FileNameLength = cpu_to_le32(len);
2353 size[0] = sizeof(struct smb2_file_link_info);
2355 data[1] = target_file;
2356 size[1] = len + 2 /* null */;
2358 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
2359 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
2365 SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2366 u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc)
2368 struct smb2_file_eof_info info;
2372 info.EndOfFile = *eof;
2375 size = sizeof(struct smb2_file_eof_info);
2378 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2379 pid, FILE_ALLOCATION_INFORMATION, 1, &data, &size);
2381 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2382 pid, FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
2386 SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2387 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
2390 size = sizeof(FILE_BASIC_INFO);
2391 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2392 current->tgid, FILE_BASIC_INFORMATION, 1,
2393 (void **)&buf, &size);
2397 SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
2398 const u64 persistent_fid, const u64 volatile_fid,
2402 struct smb2_oplock_break *req = NULL;
2404 cifs_dbg(FYI, "SMB2_oplock_break\n");
2405 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2410 req->VolatileFid = volatile_fid;
2411 req->PersistentFid = persistent_fid;
2412 req->OplockLevel = oplock_level;
2413 req->hdr.CreditRequest = cpu_to_le16(1);
2415 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2416 /* SMB2 buffer freed by function above */
2419 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2420 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
2427 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
2428 struct kstatfs *kst)
2430 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
2431 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
2432 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
2433 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
2434 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
2439 build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
2440 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
2443 struct smb2_query_info_req *req;
2445 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
2447 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
2450 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2454 req->InfoType = SMB2_O_INFO_FILESYSTEM;
2455 req->FileInfoClass = level;
2456 req->PersistentFileId = persistent_fid;
2457 req->VolatileFileId = volatile_fid;
2458 /* 4 for rfc1002 length field and 1 for pad */
2459 req->InputBufferOffset =
2460 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
2461 req->OutputBufferLength = cpu_to_le32(
2462 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
2464 iov->iov_base = (char *)req;
2465 /* 4 for rfc1002 length field */
2466 iov->iov_len = get_rfc1002_length(req) + 4;
2471 SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
2472 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
2474 struct smb2_query_info_rsp *rsp = NULL;
2478 struct cifs_ses *ses = tcon->ses;
2479 struct smb2_fs_full_size_info *info = NULL;
2481 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
2482 sizeof(struct smb2_fs_full_size_info),
2483 persistent_fid, volatile_fid);
2487 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2489 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2492 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2494 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
2495 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
2496 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2497 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2498 sizeof(struct smb2_fs_full_size_info));
2500 copy_fs_info_to_kstatfs(info, fsdata);
2503 free_rsp_buf(resp_buftype, iov.iov_base);
2508 SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2509 u64 persistent_fid, u64 volatile_fid, int level)
2511 struct smb2_query_info_rsp *rsp = NULL;
2514 int resp_buftype, max_len, min_len;
2515 struct cifs_ses *ses = tcon->ses;
2516 unsigned int rsp_len, offset;
2518 if (level == FS_DEVICE_INFORMATION) {
2519 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2520 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2521 } else if (level == FS_ATTRIBUTE_INFORMATION) {
2522 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
2523 min_len = MIN_FS_ATTR_INFO_SIZE;
2524 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
2525 max_len = sizeof(struct smb3_fs_ss_info);
2526 min_len = sizeof(struct smb3_fs_ss_info);
2528 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2532 rc = build_qfs_info_req(&iov, tcon, level, max_len,
2533 persistent_fid, volatile_fid);
2537 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2539 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2542 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2544 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
2545 offset = le16_to_cpu(rsp->OutputBufferOffset);
2546 rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
2550 if (level == FS_ATTRIBUTE_INFORMATION)
2551 memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
2552 + (char *)&rsp->hdr, min_t(unsigned int,
2554 else if (level == FS_DEVICE_INFORMATION)
2555 memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
2556 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
2557 else if (level == FS_SECTOR_SIZE_INFORMATION) {
2558 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
2559 (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
2560 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
2561 tcon->perf_sector_size =
2562 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
2566 free_rsp_buf(resp_buftype, iov.iov_base);
2571 smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
2572 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2573 const __u32 num_lock, struct smb2_lock_element *buf)
2576 struct smb2_lock_req *req = NULL;
2581 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
2583 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
2587 req->hdr.ProcessId = cpu_to_le32(pid);
2588 req->LockCount = cpu_to_le16(num_lock);
2590 req->PersistentFileId = persist_fid;
2591 req->VolatileFileId = volatile_fid;
2593 count = num_lock * sizeof(struct smb2_lock_element);
2594 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
2596 iov[0].iov_base = (char *)req;
2597 /* 4 for rfc1002 length field and count for all locks */
2598 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
2599 iov[1].iov_base = (char *)buf;
2600 iov[1].iov_len = count;
2602 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
2603 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP);
2605 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
2606 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
2613 SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
2614 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2615 const __u64 length, const __u64 offset, const __u32 lock_flags,
2618 struct smb2_lock_element lock;
2620 lock.Offset = cpu_to_le64(offset);
2621 lock.Length = cpu_to_le64(length);
2622 lock.Flags = cpu_to_le32(lock_flags);
2623 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
2624 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
2626 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
2630 SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
2631 __u8 *lease_key, const __le32 lease_state)
2634 struct smb2_lease_ack *req = NULL;
2636 cifs_dbg(FYI, "SMB2_lease_break\n");
2637 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2642 req->hdr.CreditRequest = cpu_to_le16(1);
2643 req->StructureSize = cpu_to_le16(36);
2644 inc_rfc1001_len(req, 12);
2646 memcpy(req->LeaseKey, lease_key, 16);
2647 req->LeaseState = lease_state;
2649 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2650 /* SMB2 buffer freed by function above */
2653 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2654 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);