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"
49 #include "cifs_spnego.h"
52 * The following table defines the expected "StructureSize" of SMB2 requests
53 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
55 * Note that commands are defined in smb2pdu.h in le16 but the array below is
56 * indexed by command in host byte order.
58 static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
59 /* SMB2_NEGOTIATE */ 36,
60 /* SMB2_SESSION_SETUP */ 25,
62 /* SMB2_TREE_CONNECT */ 9,
63 /* SMB2_TREE_DISCONNECT */ 4,
73 /* SMB2_QUERY_DIRECTORY */ 33,
74 /* SMB2_CHANGE_NOTIFY */ 32,
75 /* SMB2_QUERY_INFO */ 41,
76 /* SMB2_SET_INFO */ 33,
77 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
82 smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd /* command */ ,
83 const struct cifs_tcon *tcon)
85 struct smb2_pdu *pdu = (struct smb2_pdu *)hdr;
86 char *temp = (char *)hdr;
87 /* lookup word count ie StructureSize from table */
88 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_cmd)];
91 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
92 * largest operations (Create)
96 /* Note this is only network field converted to big endian */
97 hdr->smb2_buf_length = cpu_to_be32(parmsize + sizeof(struct smb2_hdr)
98 - 4 /* RFC 1001 length field itself not counted */);
100 hdr->ProtocolId = SMB2_PROTO_NUMBER;
101 hdr->StructureSize = cpu_to_le16(64);
102 hdr->Command = smb2_cmd;
103 hdr->CreditRequest = cpu_to_le16(2); /* BB make this dynamic */
104 hdr->ProcessId = cpu_to_le32((__u16)current->tgid);
109 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
110 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
111 if ((tcon->ses) && (tcon->ses->server) &&
112 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
113 hdr->CreditCharge = cpu_to_le16(1);
114 /* else CreditCharge MBZ */
116 hdr->TreeId = tcon->tid;
117 /* Uid is not converted */
119 hdr->SessionId = tcon->ses->Suid;
122 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
123 * to pass the path on the Open SMB prefixed by \\server\share.
124 * Not sure when we would need to do the augmented path (if ever) and
125 * setting this flag breaks the SMB2 open operation since it is
126 * illegal to send an empty path name (without \\server\share prefix)
127 * when the DFS flag is set in the SMB open header. We could
128 * consider setting the flag on all operations other than open
129 * but it is safer to net set it for now.
131 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
132 hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
134 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign)
135 hdr->Flags |= SMB2_FLAGS_SIGNED;
137 pdu->StructureSize2 = cpu_to_le16(parmsize);
142 smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
145 struct nls_table *nls_codepage;
146 struct cifs_ses *ses;
147 struct TCP_Server_Info *server;
150 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
151 * check for tcp and smb session status done differently
152 * for those three - in the calling routine.
157 if (smb2_command == SMB2_TREE_CONNECT)
160 if (tcon->tidStatus == CifsExiting) {
162 * only tree disconnect, open, and write,
163 * (and ulogoff which does not have tcon)
164 * are allowed as we start force umount.
166 if ((smb2_command != SMB2_WRITE) &&
167 (smb2_command != SMB2_CREATE) &&
168 (smb2_command != SMB2_TREE_DISCONNECT)) {
169 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
174 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
175 (!tcon->ses->server))
179 server = ses->server;
182 * Give demultiplex thread up to 10 seconds to reconnect, should be
183 * greater than cifs socket timeout which is 7 seconds
185 while (server->tcpStatus == CifsNeedReconnect) {
187 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
188 * here since they are implicitly done when session drops.
190 switch (smb2_command) {
192 * BB Should we keep oplock break and add flush to exceptions?
194 case SMB2_TREE_DISCONNECT:
197 case SMB2_OPLOCK_BREAK:
201 wait_event_interruptible_timeout(server->response_q,
202 (server->tcpStatus != CifsNeedReconnect), 10 * HZ);
204 /* are we still trying to reconnect? */
205 if (server->tcpStatus != CifsNeedReconnect)
209 * on "soft" mounts we wait once. Hard mounts keep
210 * retrying until process is killed or server comes
214 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
219 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
222 nls_codepage = load_nls_default();
225 * need to prevent multiple threads trying to simultaneously reconnect
226 * the same SMB session
228 mutex_lock(&tcon->ses->session_mutex);
229 rc = cifs_negotiate_protocol(0, tcon->ses);
230 if (!rc && tcon->ses->need_reconnect)
231 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
233 if (rc || !tcon->need_reconnect) {
234 mutex_unlock(&tcon->ses->session_mutex);
238 cifs_mark_open_files_invalid(tcon);
239 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
240 mutex_unlock(&tcon->ses->session_mutex);
241 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
244 atomic_inc(&tconInfoReconnectCount);
247 * Check if handle based operation so we know whether we can continue
248 * or not without returning to caller to reset file handle.
251 * BB Is flush done by server on drop of tcp session? Should we special
252 * case it and skip above?
254 switch (smb2_command) {
260 case SMB2_QUERY_DIRECTORY:
261 case SMB2_CHANGE_NOTIFY:
262 case SMB2_QUERY_INFO:
266 unload_nls(nls_codepage);
271 * Allocate and return pointer to an SMB request hdr, and set basic
272 * SMB information in the SMB header. If the return code is zero, this
273 * function must have filled in request_buf pointer.
276 small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
281 rc = smb2_reconnect(smb2_command, tcon);
285 /* BB eventually switch this to SMB2 specific small buf size */
286 *request_buf = cifs_small_buf_get();
287 if (*request_buf == NULL) {
288 /* BB should we add a retry in here if not a writepage? */
292 smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon);
295 #ifdef CONFIG_CIFS_STATS2
296 uint16_t com_code = le16_to_cpu(smb2_command);
297 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
299 cifs_stats_inc(&tcon->num_smbs_sent);
305 #ifdef CONFIG_CIFS_SMB311
306 /* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
307 #define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
310 #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
311 #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
314 build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
316 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
317 pneg_ctxt->DataLength = cpu_to_le16(38);
318 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
319 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
320 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
321 pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
325 build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
327 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
328 pneg_ctxt->DataLength = cpu_to_le16(6);
329 pneg_ctxt->CipherCount = cpu_to_le16(2);
330 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
331 pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM;
335 assemble_neg_contexts(struct smb2_negotiate_req *req)
338 /* +4 is to account for the RFC1001 len field */
339 char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT + 4;
341 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
342 /* Add 2 to size to round to 8 byte boundary */
343 pneg_ctxt += 2 + sizeof(struct smb2_preauth_neg_context);
344 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
345 req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
346 req->NegotiateContextCount = cpu_to_le16(2);
347 inc_rfc1001_len(req, 4 + sizeof(struct smb2_preauth_neg_context) + 2
348 + sizeof(struct smb2_encryption_neg_context)); /* calculate hash */
351 static void assemble_neg_contexts(struct smb2_negotiate_req *req)
360 * SMB2 Worker functions follow:
362 * The general structure of the worker functions is:
363 * 1) Call smb2_init (assembles SMB2 header)
364 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
365 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
366 * 4) Decode SMB2 command specific fields in the fixed length area
367 * 5) Decode variable length data area (if any for this SMB2 command type)
368 * 6) Call free smb buffer
374 SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
376 struct smb2_negotiate_req *req;
377 struct smb2_negotiate_rsp *rsp;
381 struct TCP_Server_Info *server = ses->server;
382 int blob_offset, blob_length;
384 int flags = CIFS_NEG_OP;
386 cifs_dbg(FYI, "Negotiate protocol\n");
389 WARN(1, "%s: server is NULL!\n", __func__);
393 rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
397 req->hdr.SessionId = 0;
399 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
401 req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */
402 inc_rfc1001_len(req, 2);
404 /* only one of SMB2 signing flags may be set in SMB2 request */
406 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
407 else if (global_secflags & CIFSSEC_MAY_SIGN)
408 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
410 req->SecurityMode = 0;
412 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
414 /* ClientGUID must be zero for SMB2.02 dialect */
415 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
416 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
418 memcpy(req->ClientGUID, server->client_guid,
419 SMB2_CLIENT_GUID_SIZE);
420 if (ses->server->vals->protocol_id == SMB311_PROT_ID)
421 assemble_neg_contexts(req);
423 iov[0].iov_base = (char *)req;
424 /* 4 for rfc1002 length field */
425 iov[0].iov_len = get_rfc1002_length(req) + 4;
427 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags);
429 rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base;
431 * No tcon so can't do
432 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
437 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
439 /* BB we may eventually want to match the negotiated vs. requested
440 dialect, even though we are only requesting one at a time */
441 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
442 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
443 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
444 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
445 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
446 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
447 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
448 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
449 #ifdef CONFIG_CIFS_SMB311
450 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
451 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
454 cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
455 le16_to_cpu(rsp->DialectRevision));
459 server->dialect = le16_to_cpu(rsp->DialectRevision);
461 /* SMB2 only has an extended negflavor */
462 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
463 /* set it to the maximum buffer size value we can send with 1 credit */
464 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
465 SMB2_MAX_BUFFER_SIZE);
466 server->max_read = le32_to_cpu(rsp->MaxReadSize);
467 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
468 /* BB Do we need to validate the SecurityMode? */
469 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
470 server->capabilities = le32_to_cpu(rsp->Capabilities);
472 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
474 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
477 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
479 * ses->sectype = RawNTLMSSP;
480 * but for time being this is our only auth choice so doesn't matter.
481 * We just found a server which sets blob length to zero expecting raw.
483 if (blob_length == 0)
484 cifs_dbg(FYI, "missing security blob on negprot\n");
486 rc = cifs_enable_signing(server, ses->sign);
490 rc = decode_negTokenInit(security_blob, blob_length, server);
497 free_rsp_buf(resp_buftype, rsp);
501 int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
504 struct validate_negotiate_info_req vneg_inbuf;
505 struct validate_negotiate_info_rsp *pneg_rsp;
508 cifs_dbg(FYI, "validate negotiate\n");
511 * validation ioctl must be signed, so no point sending this if we
512 * can not sign it. We could eventually change this to selectively
513 * sign just this, the first and only signed request on a connection.
514 * This is good enough for now since a user who wants better security
515 * would also enable signing on the mount. Having validation of
516 * negotiate info for signed connections helps reduce attack vectors
518 if (tcon->ses->server->sign == false)
519 return 0; /* validation requires signing */
521 vneg_inbuf.Capabilities =
522 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
523 memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid,
524 SMB2_CLIENT_GUID_SIZE);
527 vneg_inbuf.SecurityMode =
528 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
529 else if (global_secflags & CIFSSEC_MAY_SIGN)
530 vneg_inbuf.SecurityMode =
531 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
533 vneg_inbuf.SecurityMode = 0;
535 vneg_inbuf.DialectCount = cpu_to_le16(1);
536 vneg_inbuf.Dialects[0] =
537 cpu_to_le16(tcon->ses->server->vals->protocol_id);
539 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
540 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
541 (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
542 (char **)&pneg_rsp, &rsplen);
545 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
549 if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
550 cifs_dbg(VFS, "invalid size of protocol negotiate response\n");
554 /* check validate negotiate info response matches what we got earlier */
555 if (pneg_rsp->Dialect !=
556 cpu_to_le16(tcon->ses->server->vals->protocol_id))
559 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
562 /* do not validate server guid because not saved at negprot time yet */
564 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
565 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
568 /* validate negotiate successful */
569 cifs_dbg(FYI, "validate negotiate info successful\n");
573 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
578 SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
579 const struct nls_table *nls_cp)
581 struct smb2_sess_setup_req *req;
582 struct smb2_sess_setup_rsp *rsp = NULL;
585 int resp_buftype = CIFS_NO_BUFFER;
586 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
587 struct TCP_Server_Info *server = ses->server;
589 struct key *spnego_key = NULL;
590 char *security_blob = NULL;
591 char *ntlmssp_blob = NULL;
592 bool use_spnego = false; /* else use raw ntlmssp */
594 cifs_dbg(FYI, "Session Setup\n");
597 WARN(1, "%s: server is NULL!\n", __func__);
602 * If we are here due to reconnect, free per-smb session key
603 * in case signing was required.
605 kfree(ses->auth_key.response);
606 ses->auth_key.response = NULL;
609 * If memory allocation is successful, caller of this function
612 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
615 ses->ntlmssp->sesskey_per_smbsess = true;
617 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
618 if (ses->sectype != Kerberos && ses->sectype != RawNTLMSSP)
619 ses->sectype = RawNTLMSSP;
621 ssetup_ntlmssp_authenticate:
622 if (phase == NtLmChallenge)
623 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
625 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
629 req->hdr.SessionId = 0; /* First session, not a reauthenticate */
630 req->Flags = 0; /* MBZ */
631 /* to enable echos and oplocks */
632 req->hdr.CreditRequest = cpu_to_le16(3);
634 /* only one of SMB2 signing flags may be set in SMB2 request */
636 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
637 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
638 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
640 req->SecurityMode = 0;
642 req->Capabilities = 0;
643 req->Channel = 0; /* MBZ */
645 iov[0].iov_base = (char *)req;
646 /* 4 for rfc1002 length field and 1 for pad */
647 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
649 if (ses->sectype == Kerberos) {
650 #ifdef CONFIG_CIFS_UPCALL
651 struct cifs_spnego_msg *msg;
653 spnego_key = cifs_get_spnego_key(ses);
654 if (IS_ERR(spnego_key)) {
655 rc = PTR_ERR(spnego_key);
660 msg = spnego_key->payload.data[0];
662 * check version field to make sure that cifs.upcall is
663 * sending us a response in an expected form
665 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
667 "bad cifs.upcall version. Expected %d got %d",
668 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
672 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
674 if (!ses->auth_key.response) {
676 "Kerberos can't allocate (%u bytes) memory",
681 ses->auth_key.len = msg->sesskey_len;
682 blob_length = msg->secblob_len;
683 iov[1].iov_base = msg->data + msg->sesskey_len;
684 iov[1].iov_len = blob_length;
688 #endif /* CONFIG_CIFS_UPCALL */
689 } else if (phase == NtLmNegotiate) { /* if not krb5 must be ntlmssp */
690 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
692 if (ntlmssp_blob == NULL) {
696 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
698 /* blob_length = build_spnego_ntlmssp_blob(
700 sizeof(struct _NEGOTIATE_MESSAGE),
702 /* BB eventually need to add this */
703 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
708 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
709 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
710 security_blob = ntlmssp_blob;
712 iov[1].iov_base = security_blob;
713 iov[1].iov_len = blob_length;
714 } else if (phase == NtLmAuthenticate) {
715 req->hdr.SessionId = ses->Suid;
716 ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500,
718 if (ntlmssp_blob == NULL) {
722 rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses,
725 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n",
727 goto ssetup_exit; /* BB double check error handling */
730 /* blob_length = build_spnego_ntlmssp_blob(
734 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
739 security_blob = ntlmssp_blob;
741 iov[1].iov_base = security_blob;
742 iov[1].iov_len = blob_length;
744 cifs_dbg(VFS, "illegal ntlmssp phase\n");
749 /* Testing shows that buffer offset must be at location of Buffer[0] */
750 req->SecurityBufferOffset =
751 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
752 1 /* pad */ - 4 /* rfc1001 len */);
753 req->SecurityBufferLength = cpu_to_le16(blob_length);
755 inc_rfc1001_len(req, blob_length - 1 /* pad */);
757 /* BB add code to build os and lm fields */
759 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype,
760 CIFS_LOG_ERROR | CIFS_NEG_OP);
762 kfree(security_blob);
763 rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base;
764 ses->Suid = rsp->hdr.SessionId;
765 if (resp_buftype != CIFS_NO_BUFFER &&
766 rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) {
767 if (phase != NtLmNegotiate) {
768 cifs_dbg(VFS, "Unexpected more processing error\n");
771 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
772 le16_to_cpu(rsp->SecurityBufferOffset)) {
773 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
774 le16_to_cpu(rsp->SecurityBufferOffset));
779 /* NTLMSSP Negotiate sent now processing challenge (response) */
780 phase = NtLmChallenge; /* process ntlmssp challenge */
781 rc = 0; /* MORE_PROCESSING is not an error here but expected */
782 rc = decode_ntlmssp_challenge(rsp->Buffer,
783 le16_to_cpu(rsp->SecurityBufferLength), ses);
787 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
788 * but at least the raw NTLMSSP case works.
791 * No tcon so can't do
792 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
797 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
798 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
799 cifs_dbg(VFS, "SMB3 encryption not supported yet\n");
801 free_rsp_buf(resp_buftype, rsp);
803 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
804 if ((phase == NtLmChallenge) && (rc == 0))
805 goto ssetup_ntlmssp_authenticate;
808 mutex_lock(&server->srv_mutex);
809 if (server->sign && server->ops->generate_signingkey) {
810 rc = server->ops->generate_signingkey(ses);
811 kfree(ses->auth_key.response);
812 ses->auth_key.response = NULL;
815 "SMB3 session key generation failed\n");
816 mutex_unlock(&server->srv_mutex);
820 if (!server->session_estab) {
821 server->sequence_number = 0x2;
822 server->session_estab = true;
824 mutex_unlock(&server->srv_mutex);
826 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
827 spin_lock(&GlobalMid_Lock);
828 ses->status = CifsGood;
829 ses->need_reconnect = false;
830 spin_unlock(&GlobalMid_Lock);
835 kfree(ses->auth_key.response);
836 ses->auth_key.response = NULL;
839 key_invalidate(spnego_key);
848 SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
850 struct smb2_logoff_req *req; /* response is also trivial struct */
852 struct TCP_Server_Info *server;
854 cifs_dbg(FYI, "disconnect session %p\n", ses);
856 if (ses && (ses->server))
857 server = ses->server;
861 /* no need to send SMB logoff if uid already closed due to reconnect */
862 if (ses->need_reconnect)
863 goto smb2_session_already_dead;
865 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
869 /* since no tcon, smb2_init can not do this, so do here */
870 req->hdr.SessionId = ses->Suid;
872 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
874 rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0);
876 * No tcon so can't do
877 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
880 smb2_session_already_dead:
884 static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
886 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
889 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
891 /* These are similar values to what Windows uses */
892 static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
894 tcon->max_chunks = 256;
895 tcon->max_bytes_chunk = 1048576;
896 tcon->max_bytes_copy = 16777216;
900 SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
901 struct cifs_tcon *tcon, const struct nls_table *cp)
903 struct smb2_tree_connect_req *req;
904 struct smb2_tree_connect_rsp *rsp = NULL;
909 struct TCP_Server_Info *server;
910 __le16 *unc_path = NULL;
912 cifs_dbg(FYI, "TCON\n");
914 if ((ses->server) && tree)
915 server = ses->server;
919 if (tcon && tcon->bad_network_name)
922 if ((tcon && tcon->seal) &&
923 ((ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) == 0)) {
924 cifs_dbg(VFS, "encryption requested but no server support");
928 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
929 if (unc_path == NULL)
932 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
934 if (unc_path_len < 2) {
939 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
946 /* since no tcon, smb2_init can not do this, so do here */
947 req->hdr.SessionId = ses->Suid;
948 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
949 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
952 iov[0].iov_base = (char *)req;
953 /* 4 for rfc1002 length field and 1 for pad */
954 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
956 /* Testing shows that buffer offset must be at location of Buffer[0] */
957 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
958 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
959 req->PathLength = cpu_to_le16(unc_path_len - 2);
960 iov[1].iov_base = unc_path;
961 iov[1].iov_len = unc_path_len;
963 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
965 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
966 rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base;
970 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
971 tcon->need_reconnect = true;
973 goto tcon_error_exit;
977 ses->ipc_tid = rsp->hdr.TreeId;
981 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
982 cifs_dbg(FYI, "connection to disk share\n");
983 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
985 cifs_dbg(FYI, "connection to pipe share\n");
986 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
988 cifs_dbg(FYI, "connection to printer\n");
990 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
992 goto tcon_error_exit;
995 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
996 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
997 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
998 tcon->tidStatus = CifsGood;
999 tcon->need_reconnect = false;
1000 tcon->tid = rsp->hdr.TreeId;
1001 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
1003 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1004 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
1005 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
1006 init_copy_chunk_defaults(tcon);
1007 if (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA)
1008 cifs_dbg(VFS, "Encrypted shares not supported");
1009 if (tcon->ses->server->ops->validate_negotiate)
1010 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
1012 free_rsp_buf(resp_buftype, rsp);
1017 if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) {
1018 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
1020 tcon->bad_network_name = true;
1026 SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1028 struct smb2_tree_disconnect_req *req; /* response is trivial */
1030 struct TCP_Server_Info *server;
1031 struct cifs_ses *ses = tcon->ses;
1033 cifs_dbg(FYI, "Tree Disconnect\n");
1035 if (ses && (ses->server))
1036 server = ses->server;
1040 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1043 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
1047 rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0);
1049 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1055 static struct create_durable *
1056 create_durable_buf(void)
1058 struct create_durable *buf;
1060 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1064 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1065 (struct create_durable, Data));
1066 buf->ccontext.DataLength = cpu_to_le32(16);
1067 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1068 (struct create_durable, Name));
1069 buf->ccontext.NameLength = cpu_to_le16(4);
1070 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1078 static struct create_durable *
1079 create_reconnect_durable_buf(struct cifs_fid *fid)
1081 struct create_durable *buf;
1083 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1087 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1088 (struct create_durable, Data));
1089 buf->ccontext.DataLength = cpu_to_le32(16);
1090 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1091 (struct create_durable, Name));
1092 buf->ccontext.NameLength = cpu_to_le16(4);
1093 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1094 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
1095 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1104 parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
1105 unsigned int *epoch)
1108 struct create_context *cc;
1109 unsigned int next = 0;
1112 data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
1113 cc = (struct create_context *)data_offset;
1115 cc = (struct create_context *)((char *)cc + next);
1116 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
1117 if (le16_to_cpu(cc->NameLength) != 4 ||
1118 strncmp(name, "RqLs", 4)) {
1119 next = le32_to_cpu(cc->Next);
1122 return server->ops->parse_lease_buf(cc, epoch);
1123 } while (next != 0);
1129 add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1130 unsigned int *num_iovec, __u8 *oplock)
1132 struct smb2_create_req *req = iov[0].iov_base;
1133 unsigned int num = *num_iovec;
1135 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
1136 if (iov[num].iov_base == NULL)
1138 iov[num].iov_len = server->vals->create_lease_size;
1139 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1140 if (!req->CreateContextsOffset)
1141 req->CreateContextsOffset = cpu_to_le32(
1142 sizeof(struct smb2_create_req) - 4 +
1143 iov[num - 1].iov_len);
1144 le32_add_cpu(&req->CreateContextsLength,
1145 server->vals->create_lease_size);
1146 inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
1147 *num_iovec = num + 1;
1151 static struct create_durable_v2 *
1152 create_durable_v2_buf(struct cifs_fid *pfid)
1154 struct create_durable_v2 *buf;
1156 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1160 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1161 (struct create_durable_v2, dcontext));
1162 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
1163 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1164 (struct create_durable_v2, Name));
1165 buf->ccontext.NameLength = cpu_to_le16(4);
1167 buf->dcontext.Timeout = 0; /* Should this be configurable by workload */
1168 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1169 get_random_bytes(buf->dcontext.CreateGuid, 16);
1170 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
1172 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1180 static struct create_durable_handle_reconnect_v2 *
1181 create_reconnect_durable_v2_buf(struct cifs_fid *fid)
1183 struct create_durable_handle_reconnect_v2 *buf;
1185 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
1190 buf->ccontext.DataOffset =
1191 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1193 buf->ccontext.DataLength =
1194 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
1195 buf->ccontext.NameOffset =
1196 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1198 buf->ccontext.NameLength = cpu_to_le16(4);
1200 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
1201 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
1202 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1203 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
1205 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1214 add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
1215 struct cifs_open_parms *oparms)
1217 struct smb2_create_req *req = iov[0].iov_base;
1218 unsigned int num = *num_iovec;
1220 iov[num].iov_base = create_durable_v2_buf(oparms->fid);
1221 if (iov[num].iov_base == NULL)
1223 iov[num].iov_len = sizeof(struct create_durable_v2);
1224 if (!req->CreateContextsOffset)
1225 req->CreateContextsOffset =
1226 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1228 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
1229 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable_v2));
1230 *num_iovec = num + 1;
1235 add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
1236 struct cifs_open_parms *oparms)
1238 struct smb2_create_req *req = iov[0].iov_base;
1239 unsigned int num = *num_iovec;
1241 /* indicate that we don't need to relock the file */
1242 oparms->reconnect = false;
1244 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
1245 if (iov[num].iov_base == NULL)
1247 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
1248 if (!req->CreateContextsOffset)
1249 req->CreateContextsOffset =
1250 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1252 le32_add_cpu(&req->CreateContextsLength,
1253 sizeof(struct create_durable_handle_reconnect_v2));
1254 inc_rfc1001_len(&req->hdr,
1255 sizeof(struct create_durable_handle_reconnect_v2));
1256 *num_iovec = num + 1;
1261 add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1262 struct cifs_open_parms *oparms, bool use_persistent)
1264 struct smb2_create_req *req = iov[0].iov_base;
1265 unsigned int num = *num_iovec;
1267 if (use_persistent) {
1268 if (oparms->reconnect)
1269 return add_durable_reconnect_v2_context(iov, num_iovec,
1272 return add_durable_v2_context(iov, num_iovec, oparms);
1275 if (oparms->reconnect) {
1276 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1277 /* indicate that we don't need to relock the file */
1278 oparms->reconnect = false;
1280 iov[num].iov_base = create_durable_buf();
1281 if (iov[num].iov_base == NULL)
1283 iov[num].iov_len = sizeof(struct create_durable);
1284 if (!req->CreateContextsOffset)
1285 req->CreateContextsOffset =
1286 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1288 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
1289 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
1290 *num_iovec = num + 1;
1295 SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
1296 __u8 *oplock, struct smb2_file_all_info *buf,
1297 struct smb2_err_rsp **err_buf)
1299 struct smb2_create_req *req;
1300 struct smb2_create_rsp *rsp;
1301 struct TCP_Server_Info *server;
1302 struct cifs_tcon *tcon = oparms->tcon;
1303 struct cifs_ses *ses = tcon->ses;
1307 __le16 *copy_path = NULL;
1310 unsigned int num_iovecs = 2;
1311 __u32 file_attributes = 0;
1312 char *dhc_buf = NULL, *lc_buf = NULL;
1314 cifs_dbg(FYI, "create/open\n");
1316 if (ses && (ses->server))
1317 server = ses->server;
1321 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
1325 if (oparms->create_options & CREATE_OPTION_READONLY)
1326 file_attributes |= ATTR_READONLY;
1327 if (oparms->create_options & CREATE_OPTION_SPECIAL)
1328 file_attributes |= ATTR_SYSTEM;
1330 req->ImpersonationLevel = IL_IMPERSONATION;
1331 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
1332 /* File attributes ignored on open (used in create though) */
1333 req->FileAttributes = cpu_to_le32(file_attributes);
1334 req->ShareAccess = FILE_SHARE_ALL_LE;
1335 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1336 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
1337 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
1338 /* do not count rfc1001 len field */
1339 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
1341 iov[0].iov_base = (char *)req;
1342 /* 4 for rfc1002 length field */
1343 iov[0].iov_len = get_rfc1002_length(req) + 4;
1345 /* MUST set path len (NameLength) to 0 opening root of share */
1346 req->NameLength = cpu_to_le16(uni_path_len - 2);
1347 /* -1 since last byte is buf[0] which is sent below (path) */
1349 if (uni_path_len % 8 != 0) {
1350 copy_size = uni_path_len / 8 * 8;
1351 if (copy_size < uni_path_len)
1354 copy_path = kzalloc(copy_size, GFP_KERNEL);
1357 memcpy((char *)copy_path, (const char *)path,
1359 uni_path_len = copy_size;
1363 iov[1].iov_len = uni_path_len;
1364 iov[1].iov_base = path;
1365 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1366 inc_rfc1001_len(req, uni_path_len - 1);
1368 if (!server->oplocks)
1369 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1371 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
1372 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1373 req->RequestedOplockLevel = *oplock;
1375 rc = add_lease_context(server, iov, &num_iovecs, oplock);
1377 cifs_small_buf_release(req);
1381 lc_buf = iov[num_iovecs-1].iov_base;
1384 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1385 /* need to set Next field of lease context if we request it */
1386 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
1387 struct create_context *ccontext =
1388 (struct create_context *)iov[num_iovecs-1].iov_base;
1390 cpu_to_le32(server->vals->create_lease_size);
1393 rc = add_durable_context(iov, &num_iovecs, oparms,
1394 tcon->use_persistent);
1396 cifs_small_buf_release(req);
1401 dhc_buf = iov[num_iovecs-1].iov_base;
1404 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1405 rsp = (struct smb2_create_rsp *)iov[0].iov_base;
1408 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
1410 *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
1415 oparms->fid->persistent_fid = rsp->PersistentFileId;
1416 oparms->fid->volatile_fid = rsp->VolatileFileId;
1419 memcpy(buf, &rsp->CreationTime, 32);
1420 buf->AllocationSize = rsp->AllocationSize;
1421 buf->EndOfFile = rsp->EndofFile;
1422 buf->Attributes = rsp->FileAttributes;
1423 buf->NumberOfLinks = cpu_to_le32(1);
1424 buf->DeletePending = 0;
1427 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
1428 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
1430 *oplock = rsp->OplockLevel;
1435 free_rsp_buf(resp_buftype, rsp);
1440 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1443 SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1444 u64 volatile_fid, u32 opcode, bool is_fsctl, char *in_data,
1445 u32 indatalen, char **out_data, u32 *plen /* returned data len */)
1447 struct smb2_ioctl_req *req;
1448 struct smb2_ioctl_rsp *rsp;
1449 struct TCP_Server_Info *server;
1450 struct cifs_ses *ses;
1456 cifs_dbg(FYI, "SMB2 IOCTL\n");
1458 if (out_data != NULL)
1461 /* zero out returned data len, in case of error */
1470 if (ses && (ses->server))
1471 server = ses->server;
1475 rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req);
1479 req->CtlCode = cpu_to_le32(opcode);
1480 req->PersistentFileId = persistent_fid;
1481 req->VolatileFileId = volatile_fid;
1484 req->InputCount = cpu_to_le32(indatalen);
1485 /* do not set InputOffset if no input data */
1487 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4);
1488 iov[1].iov_base = in_data;
1489 iov[1].iov_len = indatalen;
1494 req->OutputOffset = 0;
1495 req->OutputCount = 0; /* MBZ */
1498 * Could increase MaxOutputResponse, but that would require more
1499 * than one credit. Windows typically sets this smaller, but for some
1500 * ioctls it may be useful to allow server to send more. No point
1501 * limiting what the server can send as long as fits in one credit
1503 req->MaxOutputResponse = cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1506 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
1510 iov[0].iov_base = (char *)req;
1513 * If no input data, the size of ioctl struct in
1514 * protocol spec still includes a 1 byte data buffer,
1515 * but if input data passed to ioctl, we do not
1516 * want to double count this, so we do not send
1517 * the dummy one byte of data in iovec[0] if sending
1518 * input data (in iovec[1]). We also must add 4 bytes
1519 * in first iovec to allow for rfc1002 length field.
1523 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1524 inc_rfc1001_len(req, indatalen - 1);
1526 iov[0].iov_len = get_rfc1002_length(req) + 4;
1529 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1530 rsp = (struct smb2_ioctl_rsp *)iov[0].iov_base;
1532 if ((rc != 0) && (rc != -EINVAL)) {
1533 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1535 } else if (rc == -EINVAL) {
1536 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
1537 (opcode != FSCTL_SRV_COPYCHUNK)) {
1538 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1543 /* check if caller wants to look at return data or just return rc */
1544 if ((plen == NULL) || (out_data == NULL))
1547 *plen = le32_to_cpu(rsp->OutputCount);
1549 /* We check for obvious errors in the output buffer length and offset */
1551 goto ioctl_exit; /* server returned no data */
1552 else if (*plen > 0xFF00) {
1553 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
1559 if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
1560 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
1561 le32_to_cpu(rsp->OutputOffset));
1567 *out_data = kmalloc(*plen, GFP_KERNEL);
1568 if (*out_data == NULL) {
1573 memcpy(*out_data, (char *)&rsp->hdr.ProtocolId + le32_to_cpu(rsp->OutputOffset),
1576 free_rsp_buf(resp_buftype, rsp);
1581 * Individual callers to ioctl worker function follow
1585 SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1586 u64 persistent_fid, u64 volatile_fid)
1589 struct compress_ioctl fsctl_input;
1590 char *ret_data = NULL;
1592 fsctl_input.CompressionState =
1593 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
1595 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1596 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
1597 (char *)&fsctl_input /* data input */,
1598 2 /* in data len */, &ret_data /* out data */, NULL);
1600 cifs_dbg(FYI, "set compression rc %d\n", rc);
1606 SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1607 u64 persistent_fid, u64 volatile_fid)
1609 struct smb2_close_req *req;
1610 struct smb2_close_rsp *rsp;
1611 struct TCP_Server_Info *server;
1612 struct cifs_ses *ses = tcon->ses;
1617 cifs_dbg(FYI, "Close\n");
1619 if (ses && (ses->server))
1620 server = ses->server;
1624 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1628 req->PersistentFileId = persistent_fid;
1629 req->VolatileFileId = volatile_fid;
1631 iov[0].iov_base = (char *)req;
1632 /* 4 for rfc1002 length field */
1633 iov[0].iov_len = get_rfc1002_length(req) + 4;
1635 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1636 rsp = (struct smb2_close_rsp *)iov[0].iov_base;
1639 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
1643 /* BB FIXME - decode close response, update inode for caching */
1646 free_rsp_buf(resp_buftype, rsp);
1651 validate_buf(unsigned int offset, unsigned int buffer_length,
1652 struct smb2_hdr *hdr, unsigned int min_buf_size)
1655 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
1656 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
1657 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1658 char *end_of_buf = begin_of_buf + buffer_length;
1661 if (buffer_length < min_buf_size) {
1662 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
1663 buffer_length, min_buf_size);
1667 /* check if beyond RFC1001 maximum length */
1668 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
1669 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
1670 buffer_length, smb_len);
1674 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
1675 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
1683 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1684 * Caller must free buffer.
1687 validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
1688 struct smb2_hdr *hdr, unsigned int minbufsize,
1692 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1698 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
1702 memcpy(data, begin_of_buf, buffer_length);
1708 query_info(const unsigned int xid, struct cifs_tcon *tcon,
1709 u64 persistent_fid, u64 volatile_fid, u8 info_class,
1710 size_t output_len, size_t min_len, void *data)
1712 struct smb2_query_info_req *req;
1713 struct smb2_query_info_rsp *rsp = NULL;
1717 struct TCP_Server_Info *server;
1718 struct cifs_ses *ses = tcon->ses;
1720 cifs_dbg(FYI, "Query Info\n");
1722 if (ses && (ses->server))
1723 server = ses->server;
1727 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
1731 req->InfoType = SMB2_O_INFO_FILE;
1732 req->FileInfoClass = info_class;
1733 req->PersistentFileId = persistent_fid;
1734 req->VolatileFileId = volatile_fid;
1735 /* 4 for rfc1002 length field and 1 for Buffer */
1736 req->InputBufferOffset =
1737 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
1738 req->OutputBufferLength = cpu_to_le32(output_len);
1740 iov[0].iov_base = (char *)req;
1741 /* 4 for rfc1002 length field */
1742 iov[0].iov_len = get_rfc1002_length(req) + 4;
1744 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1745 rsp = (struct smb2_query_info_rsp *)iov[0].iov_base;
1748 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
1752 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
1753 le32_to_cpu(rsp->OutputBufferLength),
1754 &rsp->hdr, min_len, data);
1757 free_rsp_buf(resp_buftype, rsp);
1762 SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
1763 u64 persistent_fid, u64 volatile_fid,
1764 struct smb2_file_all_info *data)
1766 return query_info(xid, tcon, persistent_fid, volatile_fid,
1767 FILE_ALL_INFORMATION,
1768 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
1769 sizeof(struct smb2_file_all_info), data);
1773 SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
1774 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
1776 return query_info(xid, tcon, persistent_fid, volatile_fid,
1777 FILE_INTERNAL_INFORMATION,
1778 sizeof(struct smb2_file_internal_info),
1779 sizeof(struct smb2_file_internal_info), uniqueid);
1783 * This is a no-op for now. We're not really interested in the reply, but
1784 * rather in the fact that the server sent one and that server->lstrp
1787 * FIXME: maybe we should consider checking that the reply matches request?
1790 smb2_echo_callback(struct mid_q_entry *mid)
1792 struct TCP_Server_Info *server = mid->callback_data;
1793 struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf;
1794 unsigned int credits_received = 1;
1796 if (mid->mid_state == MID_RESPONSE_RECEIVED)
1797 credits_received = le16_to_cpu(smb2->hdr.CreditRequest);
1799 mutex_lock(&server->srv_mutex);
1800 DeleteMidQEntry(mid);
1801 mutex_unlock(&server->srv_mutex);
1802 add_credits(server, credits_received, CIFS_ECHO_OP);
1806 SMB2_echo(struct TCP_Server_Info *server)
1808 struct smb2_echo_req *req;
1811 struct smb_rqst rqst = { .rq_iov = &iov,
1814 cifs_dbg(FYI, "In echo request\n");
1816 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
1820 req->hdr.CreditRequest = cpu_to_le16(1);
1822 iov.iov_base = (char *)req;
1823 /* 4 for rfc1002 length field */
1824 iov.iov_len = get_rfc1002_length(req) + 4;
1826 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server,
1829 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
1831 cifs_small_buf_release(req);
1836 SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1839 struct smb2_flush_req *req;
1840 struct TCP_Server_Info *server;
1841 struct cifs_ses *ses = tcon->ses;
1846 cifs_dbg(FYI, "Flush\n");
1848 if (ses && (ses->server))
1849 server = ses->server;
1853 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
1857 req->PersistentFileId = persistent_fid;
1858 req->VolatileFileId = volatile_fid;
1860 iov[0].iov_base = (char *)req;
1861 /* 4 for rfc1002 length field */
1862 iov[0].iov_len = get_rfc1002_length(req) + 4;
1864 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1867 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
1869 free_rsp_buf(resp_buftype, iov[0].iov_base);
1874 * To form a chain of read requests, any read requests after the first should
1875 * have the end_of_chain boolean set to true.
1878 smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms,
1879 unsigned int remaining_bytes, int request_type)
1882 struct smb2_read_req *req = NULL;
1884 rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req);
1887 if (io_parms->tcon->ses->server == NULL)
1888 return -ECONNABORTED;
1890 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1892 req->PersistentFileId = io_parms->persistent_fid;
1893 req->VolatileFileId = io_parms->volatile_fid;
1894 req->ReadChannelInfoOffset = 0; /* reserved */
1895 req->ReadChannelInfoLength = 0; /* reserved */
1896 req->Channel = 0; /* reserved */
1897 req->MinimumCount = 0;
1898 req->Length = cpu_to_le32(io_parms->length);
1899 req->Offset = cpu_to_le64(io_parms->offset);
1901 if (request_type & CHAINED_REQUEST) {
1902 if (!(request_type & END_OF_CHAIN)) {
1903 /* 4 for rfc1002 length field */
1904 req->hdr.NextCommand =
1905 cpu_to_le32(get_rfc1002_length(req) + 4);
1906 } else /* END_OF_CHAIN */
1907 req->hdr.NextCommand = 0;
1908 if (request_type & RELATED_REQUEST) {
1909 req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
1911 * Related requests use info from previous read request
1914 req->hdr.SessionId = 0xFFFFFFFF;
1915 req->hdr.TreeId = 0xFFFFFFFF;
1916 req->PersistentFileId = 0xFFFFFFFF;
1917 req->VolatileFileId = 0xFFFFFFFF;
1920 if (remaining_bytes > io_parms->length)
1921 req->RemainingBytes = cpu_to_le32(remaining_bytes);
1923 req->RemainingBytes = 0;
1925 iov[0].iov_base = (char *)req;
1926 /* 4 for rfc1002 length field */
1927 iov[0].iov_len = get_rfc1002_length(req) + 4;
1932 smb2_readv_callback(struct mid_q_entry *mid)
1934 struct cifs_readdata *rdata = mid->callback_data;
1935 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
1936 struct TCP_Server_Info *server = tcon->ses->server;
1937 struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base;
1938 unsigned int credits_received = 1;
1939 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
1941 .rq_pages = rdata->pages,
1942 .rq_npages = rdata->nr_pages,
1943 .rq_pagesz = rdata->pagesz,
1944 .rq_tailsz = rdata->tailsz };
1946 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1947 __func__, mid->mid, mid->mid_state, rdata->result,
1950 switch (mid->mid_state) {
1951 case MID_RESPONSE_RECEIVED:
1952 credits_received = le16_to_cpu(buf->CreditRequest);
1953 /* result already set, check signature */
1957 rc = smb2_verify_signature(&rqst, server);
1959 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
1962 /* FIXME: should this be counted toward the initiating task? */
1963 task_io_account_read(rdata->got_bytes);
1964 cifs_stats_bytes_read(tcon, rdata->got_bytes);
1966 case MID_REQUEST_SUBMITTED:
1967 case MID_RETRY_NEEDED:
1968 rdata->result = -EAGAIN;
1969 if (server->sign && rdata->got_bytes)
1970 /* reset bytes number since we can not check a sign */
1971 rdata->got_bytes = 0;
1972 /* FIXME: should this be counted toward the initiating task? */
1973 task_io_account_read(rdata->got_bytes);
1974 cifs_stats_bytes_read(tcon, rdata->got_bytes);
1977 if (rdata->result != -ENODATA)
1978 rdata->result = -EIO;
1982 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
1984 queue_work(cifsiod_wq, &rdata->work);
1985 mutex_lock(&server->srv_mutex);
1986 DeleteMidQEntry(mid);
1987 mutex_unlock(&server->srv_mutex);
1988 add_credits(server, credits_received, 0);
1991 /* smb2_async_readv - send an async write, and set up mid to handle result */
1993 smb2_async_readv(struct cifs_readdata *rdata)
1996 struct smb2_hdr *buf;
1997 struct cifs_io_parms io_parms;
1998 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
2000 struct TCP_Server_Info *server;
2002 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
2003 __func__, rdata->offset, rdata->bytes);
2005 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
2006 io_parms.offset = rdata->offset;
2007 io_parms.length = rdata->bytes;
2008 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
2009 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
2010 io_parms.pid = rdata->pid;
2012 server = io_parms.tcon->ses->server;
2014 rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0);
2016 if (rc == -EAGAIN && rdata->credits) {
2017 /* credits was reset by reconnect */
2019 /* reduce in_flight value since we won't send the req */
2020 spin_lock(&server->req_lock);
2021 server->in_flight--;
2022 spin_unlock(&server->req_lock);
2027 buf = (struct smb2_hdr *)rdata->iov.iov_base;
2028 /* 4 for rfc1002 length field */
2029 rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4;
2031 if (rdata->credits) {
2032 buf->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
2033 SMB2_MAX_BUFFER_SIZE));
2034 spin_lock(&server->req_lock);
2035 server->credits += rdata->credits -
2036 le16_to_cpu(buf->CreditCharge);
2037 spin_unlock(&server->req_lock);
2038 wake_up(&server->request_q);
2039 flags = CIFS_HAS_CREDITS;
2042 kref_get(&rdata->refcount);
2043 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
2044 cifs_readv_receive, smb2_readv_callback,
2047 kref_put(&rdata->refcount, cifs_readdata_release);
2048 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
2051 cifs_small_buf_release(buf);
2056 SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
2057 unsigned int *nbytes, char **buf, int *buf_type)
2059 int resp_buftype, rc = -EACCES;
2060 struct smb2_read_rsp *rsp = NULL;
2064 rc = smb2_new_read_req(iov, io_parms, 0, 0);
2068 rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1,
2069 &resp_buftype, CIFS_LOG_ERROR);
2071 rsp = (struct smb2_read_rsp *)iov[0].iov_base;
2073 if (rsp->hdr.Status == STATUS_END_OF_FILE) {
2074 free_rsp_buf(resp_buftype, iov[0].iov_base);
2079 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
2080 cifs_dbg(VFS, "Send error in read = %d\n", rc);
2082 *nbytes = le32_to_cpu(rsp->DataLength);
2083 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
2084 (*nbytes > io_parms->length)) {
2085 cifs_dbg(FYI, "bad length %d for count %d\n",
2086 *nbytes, io_parms->length);
2093 memcpy(*buf, (char *)&rsp->hdr.ProtocolId + rsp->DataOffset,
2095 free_rsp_buf(resp_buftype, iov[0].iov_base);
2096 } else if (resp_buftype != CIFS_NO_BUFFER) {
2097 *buf = iov[0].iov_base;
2098 if (resp_buftype == CIFS_SMALL_BUFFER)
2099 *buf_type = CIFS_SMALL_BUFFER;
2100 else if (resp_buftype == CIFS_LARGE_BUFFER)
2101 *buf_type = CIFS_LARGE_BUFFER;
2107 * Check the mid_state and signature on received buffer (if any), and queue the
2108 * workqueue completion task.
2111 smb2_writev_callback(struct mid_q_entry *mid)
2113 struct cifs_writedata *wdata = mid->callback_data;
2114 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
2115 struct TCP_Server_Info *server = tcon->ses->server;
2116 unsigned int written;
2117 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
2118 unsigned int credits_received = 1;
2120 switch (mid->mid_state) {
2121 case MID_RESPONSE_RECEIVED:
2122 credits_received = le16_to_cpu(rsp->hdr.CreditRequest);
2123 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
2124 if (wdata->result != 0)
2127 written = le32_to_cpu(rsp->DataLength);
2129 * Mask off high 16 bits when bytes written as returned
2130 * by the server is greater than bytes requested by the
2131 * client. OS/2 servers are known to set incorrect
2134 if (written > wdata->bytes)
2137 if (written < wdata->bytes)
2138 wdata->result = -ENOSPC;
2140 wdata->bytes = written;
2142 case MID_REQUEST_SUBMITTED:
2143 case MID_RETRY_NEEDED:
2144 wdata->result = -EAGAIN;
2147 wdata->result = -EIO;
2152 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2154 queue_work(cifsiod_wq, &wdata->work);
2155 mutex_lock(&server->srv_mutex);
2156 DeleteMidQEntry(mid);
2157 mutex_unlock(&server->srv_mutex);
2158 add_credits(tcon->ses->server, credits_received, 0);
2161 /* smb2_async_writev - send an async write, and set up mid to handle result */
2163 smb2_async_writev(struct cifs_writedata *wdata,
2164 void (*release)(struct kref *kref))
2166 int rc = -EACCES, flags = 0;
2167 struct smb2_write_req *req = NULL;
2168 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
2169 struct TCP_Server_Info *server = tcon->ses->server;
2171 struct smb_rqst rqst;
2173 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
2175 if (rc == -EAGAIN && wdata->credits) {
2176 /* credits was reset by reconnect */
2178 /* reduce in_flight value since we won't send the req */
2179 spin_lock(&server->req_lock);
2180 server->in_flight--;
2181 spin_unlock(&server->req_lock);
2183 goto async_writev_out;
2186 req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid);
2188 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
2189 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
2190 req->WriteChannelInfoOffset = 0;
2191 req->WriteChannelInfoLength = 0;
2193 req->Offset = cpu_to_le64(wdata->offset);
2194 /* 4 for rfc1002 length field */
2195 req->DataOffset = cpu_to_le16(
2196 offsetof(struct smb2_write_req, Buffer) - 4);
2197 req->RemainingBytes = 0;
2199 /* 4 for rfc1002 length field and 1 for Buffer */
2200 iov.iov_len = get_rfc1002_length(req) + 4 - 1;
2205 rqst.rq_pages = wdata->pages;
2206 rqst.rq_npages = wdata->nr_pages;
2207 rqst.rq_pagesz = wdata->pagesz;
2208 rqst.rq_tailsz = wdata->tailsz;
2210 cifs_dbg(FYI, "async write at %llu %u bytes\n",
2211 wdata->offset, wdata->bytes);
2213 req->Length = cpu_to_le32(wdata->bytes);
2215 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
2217 if (wdata->credits) {
2218 req->hdr.CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
2219 SMB2_MAX_BUFFER_SIZE));
2220 spin_lock(&server->req_lock);
2221 server->credits += wdata->credits -
2222 le16_to_cpu(req->hdr.CreditCharge);
2223 spin_unlock(&server->req_lock);
2224 wake_up(&server->request_q);
2225 flags = CIFS_HAS_CREDITS;
2228 kref_get(&wdata->refcount);
2229 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, wdata,
2233 kref_put(&wdata->refcount, release);
2234 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2238 cifs_small_buf_release(req);
2243 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2244 * The length field from io_parms must be at least 1 and indicates a number of
2245 * elements with data to write that begins with position 1 in iov array. All
2246 * data length is specified by count.
2249 SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
2250 unsigned int *nbytes, struct kvec *iov, int n_vec)
2253 struct smb2_write_req *req = NULL;
2254 struct smb2_write_rsp *rsp = NULL;
2261 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
2265 if (io_parms->tcon->ses->server == NULL)
2266 return -ECONNABORTED;
2268 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
2270 req->PersistentFileId = io_parms->persistent_fid;
2271 req->VolatileFileId = io_parms->volatile_fid;
2272 req->WriteChannelInfoOffset = 0;
2273 req->WriteChannelInfoLength = 0;
2275 req->Length = cpu_to_le32(io_parms->length);
2276 req->Offset = cpu_to_le64(io_parms->offset);
2277 /* 4 for rfc1002 length field */
2278 req->DataOffset = cpu_to_le16(
2279 offsetof(struct smb2_write_req, Buffer) - 4);
2280 req->RemainingBytes = 0;
2282 iov[0].iov_base = (char *)req;
2283 /* 4 for rfc1002 length field and 1 for Buffer */
2284 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2286 /* length of entire message including data to be written */
2287 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
2289 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
2291 rsp = (struct smb2_write_rsp *)iov[0].iov_base;
2294 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
2295 cifs_dbg(VFS, "Send error in write = %d\n", rc);
2297 *nbytes = le32_to_cpu(rsp->DataLength);
2299 free_rsp_buf(resp_buftype, rsp);
2304 num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
2307 unsigned int entrycount = 0;
2308 unsigned int next_offset = 0;
2309 FILE_DIRECTORY_INFO *entryptr;
2311 if (bufstart == NULL)
2314 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
2317 entryptr = (FILE_DIRECTORY_INFO *)
2318 ((char *)entryptr + next_offset);
2320 if ((char *)entryptr + size > end_of_buf) {
2321 cifs_dbg(VFS, "malformed search entry would overflow\n");
2325 len = le32_to_cpu(entryptr->FileNameLength);
2326 if ((char *)entryptr + len + size > end_of_buf) {
2327 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
2332 *lastentry = (char *)entryptr;
2335 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
2347 SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
2348 u64 persistent_fid, u64 volatile_fid, int index,
2349 struct cifs_search_info *srch_inf)
2351 struct smb2_query_directory_req *req;
2352 struct smb2_query_directory_rsp *rsp = NULL;
2356 int resp_buftype = CIFS_NO_BUFFER;
2357 unsigned char *bufptr;
2358 struct TCP_Server_Info *server;
2359 struct cifs_ses *ses = tcon->ses;
2360 __le16 asteriks = cpu_to_le16('*');
2362 unsigned int output_size = CIFSMaxBufSize;
2363 size_t info_buf_size;
2365 if (ses && (ses->server))
2366 server = ses->server;
2370 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
2374 switch (srch_inf->info_level) {
2375 case SMB_FIND_FILE_DIRECTORY_INFO:
2376 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
2377 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
2379 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
2380 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
2381 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
2384 cifs_dbg(VFS, "info level %u isn't supported\n",
2385 srch_inf->info_level);
2390 req->FileIndex = cpu_to_le32(index);
2391 req->PersistentFileId = persistent_fid;
2392 req->VolatileFileId = volatile_fid;
2395 bufptr = req->Buffer;
2396 memcpy(bufptr, &asteriks, len);
2398 req->FileNameOffset =
2399 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
2400 req->FileNameLength = cpu_to_le16(len);
2402 * BB could be 30 bytes or so longer if we used SMB2 specific
2403 * buffer lengths, but this is safe and close enough.
2405 output_size = min_t(unsigned int, output_size, server->maxBuf);
2406 output_size = min_t(unsigned int, output_size, 2 << 15);
2407 req->OutputBufferLength = cpu_to_le32(output_size);
2409 iov[0].iov_base = (char *)req;
2410 /* 4 for RFC1001 length and 1 for Buffer */
2411 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2413 iov[1].iov_base = (char *)(req->Buffer);
2414 iov[1].iov_len = len;
2416 inc_rfc1001_len(req, len - 1 /* Buffer */);
2418 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
2419 rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base;
2422 if (rc == -ENODATA && rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2423 srch_inf->endOfSearch = true;
2426 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
2430 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2431 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2436 srch_inf->unicode = true;
2438 if (srch_inf->ntwrk_buf_start) {
2439 if (srch_inf->smallBuf)
2440 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
2442 cifs_buf_release(srch_inf->ntwrk_buf_start);
2444 srch_inf->ntwrk_buf_start = (char *)rsp;
2445 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
2446 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
2447 /* 4 for rfc1002 length field */
2448 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
2449 srch_inf->entries_in_buffer =
2450 num_entries(srch_inf->srch_entries_start, end_of_smb,
2451 &srch_inf->last_entry, info_buf_size);
2452 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
2453 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
2454 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
2455 srch_inf->srch_entries_start, srch_inf->last_entry);
2456 if (resp_buftype == CIFS_LARGE_BUFFER)
2457 srch_inf->smallBuf = false;
2458 else if (resp_buftype == CIFS_SMALL_BUFFER)
2459 srch_inf->smallBuf = true;
2461 cifs_dbg(VFS, "illegal search buffer type\n");
2466 free_rsp_buf(resp_buftype, rsp);
2471 send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2472 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
2473 unsigned int num, void **data, unsigned int *size)
2475 struct smb2_set_info_req *req;
2476 struct smb2_set_info_rsp *rsp = NULL;
2481 struct TCP_Server_Info *server;
2482 struct cifs_ses *ses = tcon->ses;
2484 if (ses && (ses->server))
2485 server = ses->server;
2492 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
2496 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
2502 req->hdr.ProcessId = cpu_to_le32(pid);
2504 req->InfoType = SMB2_O_INFO_FILE;
2505 req->FileInfoClass = info_class;
2506 req->PersistentFileId = persistent_fid;
2507 req->VolatileFileId = volatile_fid;
2509 /* 4 for RFC1001 length and 1 for Buffer */
2511 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
2512 req->BufferLength = cpu_to_le32(*size);
2514 inc_rfc1001_len(req, *size - 1 /* Buffer */);
2516 memcpy(req->Buffer, *data, *size);
2518 iov[0].iov_base = (char *)req;
2519 /* 4 for RFC1001 length */
2520 iov[0].iov_len = get_rfc1002_length(req) + 4;
2522 for (i = 1; i < num; i++) {
2523 inc_rfc1001_len(req, size[i]);
2524 le32_add_cpu(&req->BufferLength, size[i]);
2525 iov[i].iov_base = (char *)data[i];
2526 iov[i].iov_len = size[i];
2529 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0);
2530 rsp = (struct smb2_set_info_rsp *)iov[0].iov_base;
2533 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
2535 free_rsp_buf(resp_buftype, rsp);
2541 SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
2542 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2544 struct smb2_file_rename_info info;
2546 unsigned int size[2];
2548 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2550 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2554 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
2555 /* 0 = fail if target already exists */
2556 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2557 info.FileNameLength = cpu_to_le32(len);
2560 size[0] = sizeof(struct smb2_file_rename_info);
2562 data[1] = target_file;
2563 size[1] = len + 2 /* null */;
2565 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
2566 current->tgid, FILE_RENAME_INFORMATION, 2, data,
2573 SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
2574 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2576 struct smb2_file_link_info info;
2578 unsigned int size[2];
2580 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2582 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2586 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
2587 /* 0 = fail if link already exists */
2588 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2589 info.FileNameLength = cpu_to_le32(len);
2592 size[0] = sizeof(struct smb2_file_link_info);
2594 data[1] = target_file;
2595 size[1] = len + 2 /* null */;
2597 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
2598 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
2604 SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2605 u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc)
2607 struct smb2_file_eof_info info;
2611 info.EndOfFile = *eof;
2614 size = sizeof(struct smb2_file_eof_info);
2617 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2618 pid, FILE_ALLOCATION_INFORMATION, 1, &data, &size);
2620 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2621 pid, FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
2625 SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2626 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
2629 size = sizeof(FILE_BASIC_INFO);
2630 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2631 current->tgid, FILE_BASIC_INFORMATION, 1,
2632 (void **)&buf, &size);
2636 SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
2637 const u64 persistent_fid, const u64 volatile_fid,
2641 struct smb2_oplock_break *req = NULL;
2643 cifs_dbg(FYI, "SMB2_oplock_break\n");
2644 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2649 req->VolatileFid = volatile_fid;
2650 req->PersistentFid = persistent_fid;
2651 req->OplockLevel = oplock_level;
2652 req->hdr.CreditRequest = cpu_to_le16(1);
2654 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2655 /* SMB2 buffer freed by function above */
2658 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2659 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
2666 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
2667 struct kstatfs *kst)
2669 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
2670 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
2671 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
2672 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
2673 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
2678 build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
2679 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
2682 struct smb2_query_info_req *req;
2684 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
2686 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
2689 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2693 req->InfoType = SMB2_O_INFO_FILESYSTEM;
2694 req->FileInfoClass = level;
2695 req->PersistentFileId = persistent_fid;
2696 req->VolatileFileId = volatile_fid;
2697 /* 4 for rfc1002 length field and 1 for pad */
2698 req->InputBufferOffset =
2699 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
2700 req->OutputBufferLength = cpu_to_le32(
2701 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
2703 iov->iov_base = (char *)req;
2704 /* 4 for rfc1002 length field */
2705 iov->iov_len = get_rfc1002_length(req) + 4;
2710 SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
2711 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
2713 struct smb2_query_info_rsp *rsp = NULL;
2717 struct cifs_ses *ses = tcon->ses;
2718 struct smb2_fs_full_size_info *info = NULL;
2720 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
2721 sizeof(struct smb2_fs_full_size_info),
2722 persistent_fid, volatile_fid);
2726 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2728 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2731 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2733 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
2734 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
2735 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2736 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2737 sizeof(struct smb2_fs_full_size_info));
2739 copy_fs_info_to_kstatfs(info, fsdata);
2742 free_rsp_buf(resp_buftype, iov.iov_base);
2747 SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
2748 u64 persistent_fid, u64 volatile_fid, int level)
2750 struct smb2_query_info_rsp *rsp = NULL;
2753 int resp_buftype, max_len, min_len;
2754 struct cifs_ses *ses = tcon->ses;
2755 unsigned int rsp_len, offset;
2757 if (level == FS_DEVICE_INFORMATION) {
2758 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2759 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2760 } else if (level == FS_ATTRIBUTE_INFORMATION) {
2761 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
2762 min_len = MIN_FS_ATTR_INFO_SIZE;
2763 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
2764 max_len = sizeof(struct smb3_fs_ss_info);
2765 min_len = sizeof(struct smb3_fs_ss_info);
2767 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
2771 rc = build_qfs_info_req(&iov, tcon, level, max_len,
2772 persistent_fid, volatile_fid);
2776 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2778 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2781 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2783 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
2784 offset = le16_to_cpu(rsp->OutputBufferOffset);
2785 rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
2789 if (level == FS_ATTRIBUTE_INFORMATION)
2790 memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
2791 + (char *)&rsp->hdr, min_t(unsigned int,
2793 else if (level == FS_DEVICE_INFORMATION)
2794 memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
2795 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
2796 else if (level == FS_SECTOR_SIZE_INFORMATION) {
2797 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
2798 (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
2799 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
2800 tcon->perf_sector_size =
2801 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
2805 free_rsp_buf(resp_buftype, iov.iov_base);
2810 smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
2811 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2812 const __u32 num_lock, struct smb2_lock_element *buf)
2815 struct smb2_lock_req *req = NULL;
2820 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
2822 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
2826 req->hdr.ProcessId = cpu_to_le32(pid);
2827 req->LockCount = cpu_to_le16(num_lock);
2829 req->PersistentFileId = persist_fid;
2830 req->VolatileFileId = volatile_fid;
2832 count = num_lock * sizeof(struct smb2_lock_element);
2833 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
2835 iov[0].iov_base = (char *)req;
2836 /* 4 for rfc1002 length field and count for all locks */
2837 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
2838 iov[1].iov_base = (char *)buf;
2839 iov[1].iov_len = count;
2841 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
2842 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP);
2844 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
2845 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
2852 SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
2853 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2854 const __u64 length, const __u64 offset, const __u32 lock_flags,
2857 struct smb2_lock_element lock;
2859 lock.Offset = cpu_to_le64(offset);
2860 lock.Length = cpu_to_le64(length);
2861 lock.Flags = cpu_to_le32(lock_flags);
2862 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
2863 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
2865 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
2869 SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
2870 __u8 *lease_key, const __le32 lease_state)
2873 struct smb2_lease_ack *req = NULL;
2875 cifs_dbg(FYI, "SMB2_lease_break\n");
2876 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2881 req->hdr.CreditRequest = cpu_to_le16(1);
2882 req->StructureSize = cpu_to_le16(36);
2883 inc_rfc1001_len(req, 12);
2885 memcpy(req->LeaseKey, lease_key, 16);
2886 req->LeaseState = lease_state;
2888 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2889 /* SMB2 buffer freed by function above */
2892 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2893 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);