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 if (tcon && tcon->ses && tcon->ses->server) {
104 struct TCP_Server_Info *server = tcon->ses->server;
106 spin_lock(&server->req_lock);
107 /* Request up to 2 credits but don't go over the limit. */
108 if (server->credits >= server->max_credits)
109 hdr->CreditRequest = cpu_to_le16(0);
111 hdr->CreditRequest = cpu_to_le16(
112 min_t(int, server->max_credits -
113 server->credits, 2));
114 spin_unlock(&server->req_lock);
116 hdr->CreditRequest = cpu_to_le16(2);
118 hdr->ProcessId = cpu_to_le32((__u16)current->tgid);
123 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
124 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
125 if ((tcon->ses) && (tcon->ses->server) &&
126 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
127 hdr->CreditCharge = cpu_to_le16(1);
128 /* else CreditCharge MBZ */
130 hdr->TreeId = tcon->tid;
131 /* Uid is not converted */
133 hdr->SessionId = tcon->ses->Suid;
136 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
137 * to pass the path on the Open SMB prefixed by \\server\share.
138 * Not sure when we would need to do the augmented path (if ever) and
139 * setting this flag breaks the SMB2 open operation since it is
140 * illegal to send an empty path name (without \\server\share prefix)
141 * when the DFS flag is set in the SMB open header. We could
142 * consider setting the flag on all operations other than open
143 * but it is safer to net set it for now.
145 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
146 hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
148 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign)
149 hdr->Flags |= SMB2_FLAGS_SIGNED;
151 pdu->StructureSize2 = cpu_to_le16(parmsize);
156 smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
159 struct nls_table *nls_codepage;
160 struct cifs_ses *ses;
161 struct TCP_Server_Info *server;
164 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
165 * check for tcp and smb session status done differently
166 * for those three - in the calling routine.
171 if (smb2_command == SMB2_TREE_CONNECT)
174 if (tcon->tidStatus == CifsExiting) {
176 * only tree disconnect, open, and write,
177 * (and ulogoff which does not have tcon)
178 * are allowed as we start force umount.
180 if ((smb2_command != SMB2_WRITE) &&
181 (smb2_command != SMB2_CREATE) &&
182 (smb2_command != SMB2_TREE_DISCONNECT)) {
183 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
188 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
189 (!tcon->ses->server))
193 server = ses->server;
196 * Give demultiplex thread up to 10 seconds to reconnect, should be
197 * greater than cifs socket timeout which is 7 seconds
199 while (server->tcpStatus == CifsNeedReconnect) {
201 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
202 * here since they are implicitly done when session drops.
204 switch (smb2_command) {
206 * BB Should we keep oplock break and add flush to exceptions?
208 case SMB2_TREE_DISCONNECT:
211 case SMB2_OPLOCK_BREAK:
215 wait_event_interruptible_timeout(server->response_q,
216 (server->tcpStatus != CifsNeedReconnect), 10 * HZ);
218 /* are we still trying to reconnect? */
219 if (server->tcpStatus != CifsNeedReconnect)
223 * on "soft" mounts we wait once. Hard mounts keep
224 * retrying until process is killed or server comes
228 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
233 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
236 nls_codepage = load_nls_default();
239 * need to prevent multiple threads trying to simultaneously reconnect
240 * the same SMB session
242 mutex_lock(&tcon->ses->session_mutex);
243 rc = cifs_negotiate_protocol(0, tcon->ses);
244 if (!rc && tcon->ses->need_reconnect)
245 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
247 if (rc || !tcon->need_reconnect) {
248 mutex_unlock(&tcon->ses->session_mutex);
252 cifs_mark_open_files_invalid(tcon);
254 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
255 mutex_unlock(&tcon->ses->session_mutex);
257 if (tcon->use_persistent)
258 cifs_reopen_persistent_handles(tcon);
260 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
263 atomic_inc(&tconInfoReconnectCount);
266 * Check if handle based operation so we know whether we can continue
267 * or not without returning to caller to reset file handle.
270 * BB Is flush done by server on drop of tcp session? Should we special
271 * case it and skip above?
273 switch (smb2_command) {
279 case SMB2_QUERY_DIRECTORY:
280 case SMB2_CHANGE_NOTIFY:
281 case SMB2_QUERY_INFO:
285 unload_nls(nls_codepage);
290 * Allocate and return pointer to an SMB request hdr, and set basic
291 * SMB information in the SMB header. If the return code is zero, this
292 * function must have filled in request_buf pointer.
295 small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
300 rc = smb2_reconnect(smb2_command, tcon);
304 /* BB eventually switch this to SMB2 specific small buf size */
305 *request_buf = cifs_small_buf_get();
306 if (*request_buf == NULL) {
307 /* BB should we add a retry in here if not a writepage? */
311 smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon);
314 #ifdef CONFIG_CIFS_STATS2
315 uint16_t com_code = le16_to_cpu(smb2_command);
316 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
318 cifs_stats_inc(&tcon->num_smbs_sent);
324 #ifdef CONFIG_CIFS_SMB311
325 /* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
326 #define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
329 #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
330 #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
333 build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
335 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
336 pneg_ctxt->DataLength = cpu_to_le16(38);
337 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
338 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
339 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
340 pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
344 build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
346 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
347 pneg_ctxt->DataLength = cpu_to_le16(6);
348 pneg_ctxt->CipherCount = cpu_to_le16(2);
349 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
350 pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM;
354 assemble_neg_contexts(struct smb2_negotiate_req *req)
357 /* +4 is to account for the RFC1001 len field */
358 char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT + 4;
360 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
361 /* Add 2 to size to round to 8 byte boundary */
362 pneg_ctxt += 2 + sizeof(struct smb2_preauth_neg_context);
363 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
364 req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
365 req->NegotiateContextCount = cpu_to_le16(2);
366 inc_rfc1001_len(req, 4 + sizeof(struct smb2_preauth_neg_context) + 2
367 + sizeof(struct smb2_encryption_neg_context)); /* calculate hash */
370 static void assemble_neg_contexts(struct smb2_negotiate_req *req)
379 * SMB2 Worker functions follow:
381 * The general structure of the worker functions is:
382 * 1) Call smb2_init (assembles SMB2 header)
383 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
384 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
385 * 4) Decode SMB2 command specific fields in the fixed length area
386 * 5) Decode variable length data area (if any for this SMB2 command type)
387 * 6) Call free smb buffer
393 SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
395 struct smb2_negotiate_req *req;
396 struct smb2_negotiate_rsp *rsp;
400 struct TCP_Server_Info *server = ses->server;
401 int blob_offset, blob_length;
403 int flags = CIFS_NEG_OP;
405 cifs_dbg(FYI, "Negotiate protocol\n");
408 WARN(1, "%s: server is NULL!\n", __func__);
412 rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
416 req->hdr.SessionId = 0;
418 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
420 req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */
421 inc_rfc1001_len(req, 2);
423 /* only one of SMB2 signing flags may be set in SMB2 request */
425 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
426 else if (global_secflags & CIFSSEC_MAY_SIGN)
427 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
429 req->SecurityMode = 0;
431 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
433 /* ClientGUID must be zero for SMB2.02 dialect */
434 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
435 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
437 memcpy(req->ClientGUID, server->client_guid,
438 SMB2_CLIENT_GUID_SIZE);
439 if (ses->server->vals->protocol_id == SMB311_PROT_ID)
440 assemble_neg_contexts(req);
442 iov[0].iov_base = (char *)req;
443 /* 4 for rfc1002 length field */
444 iov[0].iov_len = get_rfc1002_length(req) + 4;
446 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags);
448 rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base;
450 * No tcon so can't do
451 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
456 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
458 /* BB we may eventually want to match the negotiated vs. requested
459 dialect, even though we are only requesting one at a time */
460 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
461 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
462 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
463 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
464 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
465 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
466 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
467 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
468 #ifdef CONFIG_CIFS_SMB311
469 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
470 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
473 cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
474 le16_to_cpu(rsp->DialectRevision));
478 server->dialect = le16_to_cpu(rsp->DialectRevision);
480 /* SMB2 only has an extended negflavor */
481 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
482 /* set it to the maximum buffer size value we can send with 1 credit */
483 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
484 SMB2_MAX_BUFFER_SIZE);
485 server->max_read = le32_to_cpu(rsp->MaxReadSize);
486 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
487 /* BB Do we need to validate the SecurityMode? */
488 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
489 server->capabilities = le32_to_cpu(rsp->Capabilities);
491 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
493 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
496 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
498 * ses->sectype = RawNTLMSSP;
499 * but for time being this is our only auth choice so doesn't matter.
500 * We just found a server which sets blob length to zero expecting raw.
502 if (blob_length == 0)
503 cifs_dbg(FYI, "missing security blob on negprot\n");
505 rc = cifs_enable_signing(server, ses->sign);
509 rc = decode_negTokenInit(security_blob, blob_length, server);
516 free_rsp_buf(resp_buftype, rsp);
520 int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
523 struct validate_negotiate_info_req vneg_inbuf;
524 struct validate_negotiate_info_rsp *pneg_rsp;
527 cifs_dbg(FYI, "validate negotiate\n");
530 * validation ioctl must be signed, so no point sending this if we
531 * can not sign it. We could eventually change this to selectively
532 * sign just this, the first and only signed request on a connection.
533 * This is good enough for now since a user who wants better security
534 * would also enable signing on the mount. Having validation of
535 * negotiate info for signed connections helps reduce attack vectors
537 if (tcon->ses->server->sign == false)
538 return 0; /* validation requires signing */
540 vneg_inbuf.Capabilities =
541 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
542 memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid,
543 SMB2_CLIENT_GUID_SIZE);
546 vneg_inbuf.SecurityMode =
547 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
548 else if (global_secflags & CIFSSEC_MAY_SIGN)
549 vneg_inbuf.SecurityMode =
550 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
552 vneg_inbuf.SecurityMode = 0;
554 vneg_inbuf.DialectCount = cpu_to_le16(1);
555 vneg_inbuf.Dialects[0] =
556 cpu_to_le16(tcon->ses->server->vals->protocol_id);
558 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
559 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
560 (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
561 (char **)&pneg_rsp, &rsplen);
564 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
568 if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
569 cifs_dbg(VFS, "invalid size of protocol negotiate response\n");
573 /* check validate negotiate info response matches what we got earlier */
574 if (pneg_rsp->Dialect !=
575 cpu_to_le16(tcon->ses->server->vals->protocol_id))
578 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
581 /* do not validate server guid because not saved at negprot time yet */
583 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
584 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
587 /* validate negotiate successful */
588 cifs_dbg(FYI, "validate negotiate info successful\n");
592 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
596 struct SMB2_sess_data {
598 struct cifs_ses *ses;
599 struct nls_table *nls_cp;
600 void (*func)(struct SMB2_sess_data *);
602 u64 previous_session;
604 /* we will send the SMB in three pieces:
605 * a fixed length beginning part, an optional
606 * SPNEGO blob (which can be zero length), and a
607 * last part which will include the strings
608 * and rest of bcc area. This allows us to avoid
609 * a large buffer 17K allocation
616 SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
619 struct cifs_ses *ses = sess_data->ses;
620 struct smb2_sess_setup_req *req;
621 struct TCP_Server_Info *server = ses->server;
623 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
627 req->hdr.SessionId = 0; /* First session, not a reauthenticate */
629 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
630 req->PreviousSessionId = sess_data->previous_session;
632 req->Flags = 0; /* MBZ */
633 /* to enable echos and oplocks */
634 req->hdr.CreditRequest = cpu_to_le16(3);
636 /* only one of SMB2 signing flags may be set in SMB2 request */
638 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
639 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
640 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
642 req->SecurityMode = 0;
644 req->Capabilities = 0;
645 req->Channel = 0; /* MBZ */
647 sess_data->iov[0].iov_base = (char *)req;
648 /* 4 for rfc1002 length field and 1 for pad */
649 sess_data->iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
651 * This variable will be used to clear the buffer
652 * allocated above in case of any error in the calling function.
654 sess_data->buf0_type = CIFS_SMALL_BUFFER;
660 SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
662 free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
663 sess_data->buf0_type = CIFS_NO_BUFFER;
667 SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
670 struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
672 /* Testing shows that buffer offset must be at location of Buffer[0] */
673 req->SecurityBufferOffset =
674 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
675 1 /* pad */ - 4 /* rfc1001 len */);
676 req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
678 inc_rfc1001_len(req, sess_data->iov[1].iov_len - 1 /* pad */);
680 /* BB add code to build os and lm fields */
682 rc = SendReceive2(sess_data->xid, sess_data->ses,
684 &sess_data->buf0_type,
685 CIFS_LOG_ERROR | CIFS_NEG_OP);
691 SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
694 struct cifs_ses *ses = sess_data->ses;
696 mutex_lock(&ses->server->srv_mutex);
697 if (ses->server->sign && ses->server->ops->generate_signingkey) {
698 rc = ses->server->ops->generate_signingkey(ses);
699 kfree(ses->auth_key.response);
700 ses->auth_key.response = NULL;
703 "SMB3 session key generation failed\n");
704 mutex_unlock(&ses->server->srv_mutex);
708 if (!ses->server->session_estab) {
709 ses->server->sequence_number = 0x2;
710 ses->server->session_estab = true;
712 mutex_unlock(&ses->server->srv_mutex);
714 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
715 spin_lock(&GlobalMid_Lock);
716 ses->status = CifsGood;
717 ses->need_reconnect = false;
718 spin_unlock(&GlobalMid_Lock);
721 if (!ses->server->sign) {
722 kfree(ses->auth_key.response);
723 ses->auth_key.response = NULL;
728 #ifdef CONFIG_CIFS_UPCALL
730 SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
733 struct cifs_ses *ses = sess_data->ses;
734 struct cifs_spnego_msg *msg;
735 struct key *spnego_key = NULL;
736 struct smb2_sess_setup_rsp *rsp = NULL;
738 rc = SMB2_sess_alloc_buffer(sess_data);
742 spnego_key = cifs_get_spnego_key(ses);
743 if (IS_ERR(spnego_key)) {
744 rc = PTR_ERR(spnego_key);
749 msg = spnego_key->payload.data[0];
751 * check version field to make sure that cifs.upcall is
752 * sending us a response in an expected form
754 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
756 "bad cifs.upcall version. Expected %d got %d",
757 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
759 goto out_put_spnego_key;
762 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
764 if (!ses->auth_key.response) {
766 "Kerberos can't allocate (%u bytes) memory",
769 goto out_put_spnego_key;
771 ses->auth_key.len = msg->sesskey_len;
773 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
774 sess_data->iov[1].iov_len = msg->secblob_len;
776 rc = SMB2_sess_sendreceive(sess_data);
778 goto out_put_spnego_key;
780 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
781 ses->Suid = rsp->hdr.SessionId;
783 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
784 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
785 cifs_dbg(VFS, "SMB3 encryption not supported yet\n");
787 rc = SMB2_sess_establish_session(sess_data);
789 key_invalidate(spnego_key);
792 sess_data->result = rc;
793 sess_data->func = NULL;
794 SMB2_sess_free_buffer(sess_data);
798 SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
800 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
801 sess_data->result = -EOPNOTSUPP;
802 sess_data->func = NULL;
807 SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
808 const struct nls_table *nls_cp)
810 struct smb2_sess_setup_req *req;
811 struct smb2_sess_setup_rsp *rsp = NULL;
814 int resp_buftype = CIFS_NO_BUFFER;
815 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
816 struct TCP_Server_Info *server = ses->server;
818 char *security_blob = NULL;
819 unsigned char *ntlmssp_blob = NULL;
820 bool use_spnego = false; /* else use raw ntlmssp */
821 u64 previous_session = ses->Suid;
822 struct SMB2_sess_data *sess_data;
824 cifs_dbg(FYI, "Session Setup\n");
827 WARN(1, "%s: server is NULL!\n", __func__);
831 sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
834 sess_data->xid = xid;
835 sess_data->ses = ses;
836 sess_data->buf0_type = CIFS_NO_BUFFER;
837 sess_data->nls_cp = (struct nls_table *) nls_cp;
838 sess_data->previous_session = ses->Suid;
840 if (ses->sectype == Kerberos) {
841 SMB2_auth_kerberos(sess_data);
846 * If we are here due to reconnect, free per-smb session key
847 * in case signing was required.
849 kfree(ses->auth_key.response);
850 ses->auth_key.response = NULL;
853 * If memory allocation is successful, caller of this function
856 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
859 ses->ntlmssp->sesskey_per_smbsess = true;
861 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
862 if (ses->sectype != Kerberos && ses->sectype != RawNTLMSSP)
863 ses->sectype = RawNTLMSSP;
865 ssetup_ntlmssp_authenticate:
866 if (phase == NtLmChallenge)
867 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
869 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
873 req->hdr.SessionId = 0; /* First session, not a reauthenticate */
875 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
876 req->PreviousSessionId = previous_session;
878 req->Flags = 0; /* MBZ */
879 /* to enable echos and oplocks */
880 req->hdr.CreditRequest = cpu_to_le16(3);
882 /* only one of SMB2 signing flags may be set in SMB2 request */
884 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
885 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
886 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
888 req->SecurityMode = 0;
890 req->Capabilities = 0;
891 req->Channel = 0; /* MBZ */
893 iov[0].iov_base = (char *)req;
894 /* 4 for rfc1002 length field and 1 for pad */
895 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
897 if (phase == NtLmNegotiate) {
898 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
900 if (ntlmssp_blob == NULL) {
904 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
906 /* blob_length = build_spnego_ntlmssp_blob(
908 sizeof(struct _NEGOTIATE_MESSAGE),
910 /* BB eventually need to add this */
911 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
916 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
917 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
918 security_blob = ntlmssp_blob;
920 iov[1].iov_base = security_blob;
921 iov[1].iov_len = blob_length;
922 } else if (phase == NtLmAuthenticate) {
923 req->hdr.SessionId = ses->Suid;
924 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
927 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n",
929 goto ssetup_exit; /* BB double check error handling */
932 /* blob_length = build_spnego_ntlmssp_blob(
936 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
941 security_blob = ntlmssp_blob;
943 iov[1].iov_base = security_blob;
944 iov[1].iov_len = blob_length;
946 cifs_dbg(VFS, "illegal ntlmssp phase\n");
951 /* Testing shows that buffer offset must be at location of Buffer[0] */
952 req->SecurityBufferOffset =
953 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
954 1 /* pad */ - 4 /* rfc1001 len */);
955 req->SecurityBufferLength = cpu_to_le16(blob_length);
957 inc_rfc1001_len(req, blob_length - 1 /* pad */);
959 /* BB add code to build os and lm fields */
961 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype,
962 CIFS_LOG_ERROR | CIFS_NEG_OP);
964 kfree(security_blob);
965 rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base;
966 ses->Suid = rsp->hdr.SessionId;
967 if (resp_buftype != CIFS_NO_BUFFER &&
968 rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) {
969 if (phase != NtLmNegotiate) {
970 cifs_dbg(VFS, "Unexpected more processing error\n");
973 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
974 le16_to_cpu(rsp->SecurityBufferOffset)) {
975 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
976 le16_to_cpu(rsp->SecurityBufferOffset));
981 /* NTLMSSP Negotiate sent now processing challenge (response) */
982 phase = NtLmChallenge; /* process ntlmssp challenge */
983 rc = 0; /* MORE_PROCESSING is not an error here but expected */
984 rc = decode_ntlmssp_challenge(rsp->Buffer,
985 le16_to_cpu(rsp->SecurityBufferLength), ses);
989 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
990 * but at least the raw NTLMSSP case works.
993 * No tcon so can't do
994 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
999 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
1000 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
1001 cifs_dbg(VFS, "SMB3 encryption not supported yet\n");
1003 free_rsp_buf(resp_buftype, rsp);
1005 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
1006 if ((phase == NtLmChallenge) && (rc == 0))
1007 goto ssetup_ntlmssp_authenticate;
1010 mutex_lock(&server->srv_mutex);
1011 if (server->sign && server->ops->generate_signingkey) {
1012 rc = server->ops->generate_signingkey(ses);
1013 kfree(ses->auth_key.response);
1014 ses->auth_key.response = NULL;
1017 "SMB3 session key generation failed\n");
1018 mutex_unlock(&server->srv_mutex);
1022 if (!server->session_estab) {
1023 server->sequence_number = 0x2;
1024 server->session_estab = true;
1026 mutex_unlock(&server->srv_mutex);
1028 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
1029 spin_lock(&GlobalMid_Lock);
1030 ses->status = CifsGood;
1031 ses->need_reconnect = false;
1032 spin_unlock(&GlobalMid_Lock);
1036 if (!server->sign) {
1037 kfree(ses->auth_key.response);
1038 ses->auth_key.response = NULL;
1040 kfree(ses->ntlmssp);
1044 rc = sess_data->result;
1050 SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
1052 struct smb2_logoff_req *req; /* response is also trivial struct */
1054 struct TCP_Server_Info *server;
1056 cifs_dbg(FYI, "disconnect session %p\n", ses);
1058 if (ses && (ses->server))
1059 server = ses->server;
1063 /* no need to send SMB logoff if uid already closed due to reconnect */
1064 if (ses->need_reconnect)
1065 goto smb2_session_already_dead;
1067 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
1071 /* since no tcon, smb2_init can not do this, so do here */
1072 req->hdr.SessionId = ses->Suid;
1074 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
1076 rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0);
1078 * No tcon so can't do
1079 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1082 smb2_session_already_dead:
1086 static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
1088 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
1091 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1093 /* These are similar values to what Windows uses */
1094 static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
1096 tcon->max_chunks = 256;
1097 tcon->max_bytes_chunk = 1048576;
1098 tcon->max_bytes_copy = 16777216;
1102 SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
1103 struct cifs_tcon *tcon, const struct nls_table *cp)
1105 struct smb2_tree_connect_req *req;
1106 struct smb2_tree_connect_rsp *rsp = NULL;
1111 struct TCP_Server_Info *server;
1112 __le16 *unc_path = NULL;
1114 cifs_dbg(FYI, "TCON\n");
1116 if ((ses->server) && tree)
1117 server = ses->server;
1121 if (tcon && tcon->bad_network_name)
1124 if ((tcon && tcon->seal) &&
1125 ((ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) == 0)) {
1126 cifs_dbg(VFS, "encryption requested but no server support");
1130 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
1131 if (unc_path == NULL)
1134 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
1136 if (unc_path_len < 2) {
1141 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
1148 /* since no tcon, smb2_init can not do this, so do here */
1149 req->hdr.SessionId = ses->Suid;
1150 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
1151 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
1154 iov[0].iov_base = (char *)req;
1155 /* 4 for rfc1002 length field and 1 for pad */
1156 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1158 /* Testing shows that buffer offset must be at location of Buffer[0] */
1159 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
1160 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
1161 req->PathLength = cpu_to_le16(unc_path_len - 2);
1162 iov[1].iov_base = unc_path;
1163 iov[1].iov_len = unc_path_len;
1165 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
1167 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
1168 rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base;
1172 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
1173 tcon->need_reconnect = true;
1175 goto tcon_error_exit;
1179 ses->ipc_tid = rsp->hdr.TreeId;
1183 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
1184 cifs_dbg(FYI, "connection to disk share\n");
1185 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
1187 cifs_dbg(FYI, "connection to pipe share\n");
1188 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
1190 cifs_dbg(FYI, "connection to printer\n");
1192 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
1194 goto tcon_error_exit;
1197 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
1198 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
1199 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1200 tcon->tidStatus = CifsGood;
1201 tcon->need_reconnect = false;
1202 tcon->tid = rsp->hdr.TreeId;
1203 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
1205 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1206 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
1207 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
1208 init_copy_chunk_defaults(tcon);
1209 if (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA)
1210 cifs_dbg(VFS, "Encrypted shares not supported");
1211 if (tcon->ses->server->ops->validate_negotiate)
1212 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
1214 free_rsp_buf(resp_buftype, rsp);
1219 if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) {
1220 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
1222 tcon->bad_network_name = true;
1228 SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1230 struct smb2_tree_disconnect_req *req; /* response is trivial */
1232 struct TCP_Server_Info *server;
1233 struct cifs_ses *ses = tcon->ses;
1235 cifs_dbg(FYI, "Tree Disconnect\n");
1237 if (ses && (ses->server))
1238 server = ses->server;
1242 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1245 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
1249 rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0);
1251 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1257 static struct create_durable *
1258 create_durable_buf(void)
1260 struct create_durable *buf;
1262 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1266 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1267 (struct create_durable, Data));
1268 buf->ccontext.DataLength = cpu_to_le32(16);
1269 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1270 (struct create_durable, Name));
1271 buf->ccontext.NameLength = cpu_to_le16(4);
1272 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1280 static struct create_durable *
1281 create_reconnect_durable_buf(struct cifs_fid *fid)
1283 struct create_durable *buf;
1285 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1289 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1290 (struct create_durable, Data));
1291 buf->ccontext.DataLength = cpu_to_le32(16);
1292 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1293 (struct create_durable, Name));
1294 buf->ccontext.NameLength = cpu_to_le16(4);
1295 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1296 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
1297 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1306 parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
1307 unsigned int *epoch)
1310 struct create_context *cc;
1312 unsigned int remaining;
1315 data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
1316 remaining = le32_to_cpu(rsp->CreateContextsLength);
1317 cc = (struct create_context *)data_offset;
1318 while (remaining >= sizeof(struct create_context)) {
1319 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
1320 if (le16_to_cpu(cc->NameLength) == 4 &&
1321 strncmp(name, "RqLs", 4) == 0)
1322 return server->ops->parse_lease_buf(cc, epoch);
1324 next = le32_to_cpu(cc->Next);
1328 cc = (struct create_context *)((char *)cc + next);
1335 add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1336 unsigned int *num_iovec, __u8 *oplock)
1338 struct smb2_create_req *req = iov[0].iov_base;
1339 unsigned int num = *num_iovec;
1341 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
1342 if (iov[num].iov_base == NULL)
1344 iov[num].iov_len = server->vals->create_lease_size;
1345 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1346 if (!req->CreateContextsOffset)
1347 req->CreateContextsOffset = cpu_to_le32(
1348 sizeof(struct smb2_create_req) - 4 +
1349 iov[num - 1].iov_len);
1350 le32_add_cpu(&req->CreateContextsLength,
1351 server->vals->create_lease_size);
1352 inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
1353 *num_iovec = num + 1;
1357 static struct create_durable_v2 *
1358 create_durable_v2_buf(struct cifs_fid *pfid)
1360 struct create_durable_v2 *buf;
1362 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
1366 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1367 (struct create_durable_v2, dcontext));
1368 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
1369 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1370 (struct create_durable_v2, Name));
1371 buf->ccontext.NameLength = cpu_to_le16(4);
1373 buf->dcontext.Timeout = 0; /* Should this be configurable by workload */
1374 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1375 generate_random_uuid(buf->dcontext.CreateGuid);
1376 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
1378 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1386 static struct create_durable_handle_reconnect_v2 *
1387 create_reconnect_durable_v2_buf(struct cifs_fid *fid)
1389 struct create_durable_handle_reconnect_v2 *buf;
1391 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
1396 buf->ccontext.DataOffset =
1397 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1399 buf->ccontext.DataLength =
1400 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
1401 buf->ccontext.NameOffset =
1402 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1404 buf->ccontext.NameLength = cpu_to_le16(4);
1406 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
1407 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
1408 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1409 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
1411 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1420 add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
1421 struct cifs_open_parms *oparms)
1423 struct smb2_create_req *req = iov[0].iov_base;
1424 unsigned int num = *num_iovec;
1426 iov[num].iov_base = create_durable_v2_buf(oparms->fid);
1427 if (iov[num].iov_base == NULL)
1429 iov[num].iov_len = sizeof(struct create_durable_v2);
1430 if (!req->CreateContextsOffset)
1431 req->CreateContextsOffset =
1432 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1434 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
1435 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable_v2));
1436 *num_iovec = num + 1;
1441 add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
1442 struct cifs_open_parms *oparms)
1444 struct smb2_create_req *req = iov[0].iov_base;
1445 unsigned int num = *num_iovec;
1447 /* indicate that we don't need to relock the file */
1448 oparms->reconnect = false;
1450 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
1451 if (iov[num].iov_base == NULL)
1453 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
1454 if (!req->CreateContextsOffset)
1455 req->CreateContextsOffset =
1456 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1458 le32_add_cpu(&req->CreateContextsLength,
1459 sizeof(struct create_durable_handle_reconnect_v2));
1460 inc_rfc1001_len(&req->hdr,
1461 sizeof(struct create_durable_handle_reconnect_v2));
1462 *num_iovec = num + 1;
1467 add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1468 struct cifs_open_parms *oparms, bool use_persistent)
1470 struct smb2_create_req *req = iov[0].iov_base;
1471 unsigned int num = *num_iovec;
1473 if (use_persistent) {
1474 if (oparms->reconnect)
1475 return add_durable_reconnect_v2_context(iov, num_iovec,
1478 return add_durable_v2_context(iov, num_iovec, oparms);
1481 if (oparms->reconnect) {
1482 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1483 /* indicate that we don't need to relock the file */
1484 oparms->reconnect = false;
1486 iov[num].iov_base = create_durable_buf();
1487 if (iov[num].iov_base == NULL)
1489 iov[num].iov_len = sizeof(struct create_durable);
1490 if (!req->CreateContextsOffset)
1491 req->CreateContextsOffset =
1492 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1494 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
1495 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
1496 *num_iovec = num + 1;
1501 SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
1502 __u8 *oplock, struct smb2_file_all_info *buf,
1503 struct smb2_err_rsp **err_buf)
1505 struct smb2_create_req *req;
1506 struct smb2_create_rsp *rsp;
1507 struct TCP_Server_Info *server;
1508 struct cifs_tcon *tcon = oparms->tcon;
1509 struct cifs_ses *ses = tcon->ses;
1513 __le16 *copy_path = NULL;
1516 unsigned int num_iovecs = 2;
1517 __u32 file_attributes = 0;
1518 char *dhc_buf = NULL, *lc_buf = NULL;
1520 cifs_dbg(FYI, "create/open\n");
1522 if (ses && (ses->server))
1523 server = ses->server;
1527 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
1531 if (oparms->create_options & CREATE_OPTION_READONLY)
1532 file_attributes |= ATTR_READONLY;
1533 if (oparms->create_options & CREATE_OPTION_SPECIAL)
1534 file_attributes |= ATTR_SYSTEM;
1536 req->ImpersonationLevel = IL_IMPERSONATION;
1537 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
1538 /* File attributes ignored on open (used in create though) */
1539 req->FileAttributes = cpu_to_le32(file_attributes);
1540 req->ShareAccess = FILE_SHARE_ALL_LE;
1541 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1542 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
1543 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
1544 /* do not count rfc1001 len field */
1545 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
1547 iov[0].iov_base = (char *)req;
1548 /* 4 for rfc1002 length field */
1549 iov[0].iov_len = get_rfc1002_length(req) + 4;
1551 /* MUST set path len (NameLength) to 0 opening root of share */
1552 req->NameLength = cpu_to_le16(uni_path_len - 2);
1553 /* -1 since last byte is buf[0] which is sent below (path) */
1555 if (uni_path_len % 8 != 0) {
1556 copy_size = uni_path_len / 8 * 8;
1557 if (copy_size < uni_path_len)
1560 copy_path = kzalloc(copy_size, GFP_KERNEL);
1563 memcpy((char *)copy_path, (const char *)path,
1565 uni_path_len = copy_size;
1569 iov[1].iov_len = uni_path_len;
1570 iov[1].iov_base = path;
1571 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1572 inc_rfc1001_len(req, uni_path_len - 1);
1574 if (!server->oplocks)
1575 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1577 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
1578 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1579 req->RequestedOplockLevel = *oplock;
1581 rc = add_lease_context(server, iov, &num_iovecs, oplock);
1583 cifs_small_buf_release(req);
1587 lc_buf = iov[num_iovecs-1].iov_base;
1590 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1591 /* need to set Next field of lease context if we request it */
1592 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
1593 struct create_context *ccontext =
1594 (struct create_context *)iov[num_iovecs-1].iov_base;
1596 cpu_to_le32(server->vals->create_lease_size);
1599 rc = add_durable_context(iov, &num_iovecs, oparms,
1600 tcon->use_persistent);
1602 cifs_small_buf_release(req);
1607 dhc_buf = iov[num_iovecs-1].iov_base;
1610 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1611 rsp = (struct smb2_create_rsp *)iov[0].iov_base;
1614 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
1616 *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
1621 oparms->fid->persistent_fid = rsp->PersistentFileId;
1622 oparms->fid->volatile_fid = rsp->VolatileFileId;
1625 memcpy(buf, &rsp->CreationTime, 32);
1626 buf->AllocationSize = rsp->AllocationSize;
1627 buf->EndOfFile = rsp->EndofFile;
1628 buf->Attributes = rsp->FileAttributes;
1629 buf->NumberOfLinks = cpu_to_le32(1);
1630 buf->DeletePending = 0;
1633 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
1634 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
1636 *oplock = rsp->OplockLevel;
1641 free_rsp_buf(resp_buftype, rsp);
1646 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1649 SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1650 u64 volatile_fid, u32 opcode, bool is_fsctl, char *in_data,
1651 u32 indatalen, char **out_data, u32 *plen /* returned data len */)
1653 struct smb2_ioctl_req *req;
1654 struct smb2_ioctl_rsp *rsp;
1655 struct TCP_Server_Info *server;
1656 struct cifs_ses *ses;
1662 cifs_dbg(FYI, "SMB2 IOCTL\n");
1664 if (out_data != NULL)
1667 /* zero out returned data len, in case of error */
1676 if (ses && (ses->server))
1677 server = ses->server;
1681 rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req);
1685 req->CtlCode = cpu_to_le32(opcode);
1686 req->PersistentFileId = persistent_fid;
1687 req->VolatileFileId = volatile_fid;
1690 req->InputCount = cpu_to_le32(indatalen);
1691 /* do not set InputOffset if no input data */
1693 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4);
1694 iov[1].iov_base = in_data;
1695 iov[1].iov_len = indatalen;
1700 req->OutputOffset = 0;
1701 req->OutputCount = 0; /* MBZ */
1704 * Could increase MaxOutputResponse, but that would require more
1705 * than one credit. Windows typically sets this smaller, but for some
1706 * ioctls it may be useful to allow server to send more. No point
1707 * limiting what the server can send as long as fits in one credit
1709 req->MaxOutputResponse = cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1712 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
1716 iov[0].iov_base = (char *)req;
1719 * If no input data, the size of ioctl struct in
1720 * protocol spec still includes a 1 byte data buffer,
1721 * but if input data passed to ioctl, we do not
1722 * want to double count this, so we do not send
1723 * the dummy one byte of data in iovec[0] if sending
1724 * input data (in iovec[1]). We also must add 4 bytes
1725 * in first iovec to allow for rfc1002 length field.
1729 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1730 inc_rfc1001_len(req, indatalen - 1);
1732 iov[0].iov_len = get_rfc1002_length(req) + 4;
1735 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1736 rsp = (struct smb2_ioctl_rsp *)iov[0].iov_base;
1738 if ((rc != 0) && (rc != -EINVAL)) {
1739 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1741 } else if (rc == -EINVAL) {
1742 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
1743 (opcode != FSCTL_SRV_COPYCHUNK)) {
1744 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1749 /* check if caller wants to look at return data or just return rc */
1750 if ((plen == NULL) || (out_data == NULL))
1753 *plen = le32_to_cpu(rsp->OutputCount);
1755 /* We check for obvious errors in the output buffer length and offset */
1757 goto ioctl_exit; /* server returned no data */
1758 else if (*plen > 0xFF00) {
1759 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
1765 if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
1766 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
1767 le32_to_cpu(rsp->OutputOffset));
1773 *out_data = kmalloc(*plen, GFP_KERNEL);
1774 if (*out_data == NULL) {
1780 (char *)&rsp->hdr.ProtocolId + le32_to_cpu(rsp->OutputOffset),
1783 free_rsp_buf(resp_buftype, rsp);
1788 * Individual callers to ioctl worker function follow
1792 SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1793 u64 persistent_fid, u64 volatile_fid)
1796 struct compress_ioctl fsctl_input;
1797 char *ret_data = NULL;
1799 fsctl_input.CompressionState =
1800 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
1802 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1803 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
1804 (char *)&fsctl_input /* data input */,
1805 2 /* in data len */, &ret_data /* out data */, NULL);
1807 cifs_dbg(FYI, "set compression rc %d\n", rc);
1813 SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1814 u64 persistent_fid, u64 volatile_fid)
1816 struct smb2_close_req *req;
1817 struct smb2_close_rsp *rsp;
1818 struct TCP_Server_Info *server;
1819 struct cifs_ses *ses = tcon->ses;
1824 cifs_dbg(FYI, "Close\n");
1826 if (ses && (ses->server))
1827 server = ses->server;
1831 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1835 req->PersistentFileId = persistent_fid;
1836 req->VolatileFileId = volatile_fid;
1838 iov[0].iov_base = (char *)req;
1839 /* 4 for rfc1002 length field */
1840 iov[0].iov_len = get_rfc1002_length(req) + 4;
1842 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1843 rsp = (struct smb2_close_rsp *)iov[0].iov_base;
1846 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
1850 /* BB FIXME - decode close response, update inode for caching */
1853 free_rsp_buf(resp_buftype, rsp);
1858 validate_buf(unsigned int offset, unsigned int buffer_length,
1859 struct smb2_hdr *hdr, unsigned int min_buf_size)
1862 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
1863 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
1864 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1865 char *end_of_buf = begin_of_buf + buffer_length;
1868 if (buffer_length < min_buf_size) {
1869 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
1870 buffer_length, min_buf_size);
1874 /* check if beyond RFC1001 maximum length */
1875 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
1876 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
1877 buffer_length, smb_len);
1881 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
1882 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
1890 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1891 * Caller must free buffer.
1894 validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
1895 struct smb2_hdr *hdr, unsigned int minbufsize,
1899 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1905 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
1909 memcpy(data, begin_of_buf, buffer_length);
1915 query_info(const unsigned int xid, struct cifs_tcon *tcon,
1916 u64 persistent_fid, u64 volatile_fid, u8 info_class,
1917 size_t output_len, size_t min_len, void *data)
1919 struct smb2_query_info_req *req;
1920 struct smb2_query_info_rsp *rsp = NULL;
1924 struct TCP_Server_Info *server;
1925 struct cifs_ses *ses = tcon->ses;
1927 cifs_dbg(FYI, "Query Info\n");
1929 if (ses && (ses->server))
1930 server = ses->server;
1934 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
1938 req->InfoType = SMB2_O_INFO_FILE;
1939 req->FileInfoClass = info_class;
1940 req->PersistentFileId = persistent_fid;
1941 req->VolatileFileId = volatile_fid;
1942 /* 4 for rfc1002 length field and 1 for Buffer */
1943 req->InputBufferOffset =
1944 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
1945 req->OutputBufferLength = cpu_to_le32(output_len);
1947 iov[0].iov_base = (char *)req;
1948 /* 4 for rfc1002 length field */
1949 iov[0].iov_len = get_rfc1002_length(req) + 4;
1951 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1952 rsp = (struct smb2_query_info_rsp *)iov[0].iov_base;
1955 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
1959 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
1960 le32_to_cpu(rsp->OutputBufferLength),
1961 &rsp->hdr, min_len, data);
1964 free_rsp_buf(resp_buftype, rsp);
1969 SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
1970 u64 persistent_fid, u64 volatile_fid,
1971 struct smb2_file_all_info *data)
1973 return query_info(xid, tcon, persistent_fid, volatile_fid,
1974 FILE_ALL_INFORMATION,
1975 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
1976 sizeof(struct smb2_file_all_info), data);
1980 SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
1981 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
1983 return query_info(xid, tcon, persistent_fid, volatile_fid,
1984 FILE_INTERNAL_INFORMATION,
1985 sizeof(struct smb2_file_internal_info),
1986 sizeof(struct smb2_file_internal_info), uniqueid);
1990 * This is a no-op for now. We're not really interested in the reply, but
1991 * rather in the fact that the server sent one and that server->lstrp
1994 * FIXME: maybe we should consider checking that the reply matches request?
1997 smb2_echo_callback(struct mid_q_entry *mid)
1999 struct TCP_Server_Info *server = mid->callback_data;
2000 struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf;
2001 unsigned int credits_received = 1;
2003 if (mid->mid_state == MID_RESPONSE_RECEIVED)
2004 credits_received = le16_to_cpu(smb2->hdr.CreditRequest);
2006 mutex_lock(&server->srv_mutex);
2007 DeleteMidQEntry(mid);
2008 mutex_unlock(&server->srv_mutex);
2009 add_credits(server, credits_received, CIFS_ECHO_OP);
2013 SMB2_echo(struct TCP_Server_Info *server)
2015 struct smb2_echo_req *req;
2018 struct smb_rqst rqst = { .rq_iov = &iov,
2021 cifs_dbg(FYI, "In echo request\n");
2023 if (server->tcpStatus == CifsNeedNegotiate) {
2024 struct list_head *tmp, *tmp2;
2025 struct cifs_ses *ses;
2026 struct cifs_tcon *tcon;
2028 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
2029 spin_lock(&cifs_tcp_ses_lock);
2030 list_for_each(tmp, &server->smb_ses_list) {
2031 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
2032 list_for_each(tmp2, &ses->tcon_list) {
2033 tcon = list_entry(tmp2, struct cifs_tcon,
2035 /* add check for persistent handle reconnect */
2036 if (tcon && tcon->need_reconnect) {
2037 spin_unlock(&cifs_tcp_ses_lock);
2038 rc = smb2_reconnect(SMB2_ECHO, tcon);
2039 spin_lock(&cifs_tcp_ses_lock);
2043 spin_unlock(&cifs_tcp_ses_lock);
2046 /* if no session, renegotiate failed above */
2047 if (server->tcpStatus == CifsNeedNegotiate)
2050 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
2054 req->hdr.CreditRequest = cpu_to_le16(1);
2056 iov.iov_base = (char *)req;
2057 /* 4 for rfc1002 length field */
2058 iov.iov_len = get_rfc1002_length(req) + 4;
2060 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server,
2063 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
2065 cifs_small_buf_release(req);
2070 SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2073 struct smb2_flush_req *req;
2074 struct TCP_Server_Info *server;
2075 struct cifs_ses *ses = tcon->ses;
2080 cifs_dbg(FYI, "Flush\n");
2082 if (ses && (ses->server))
2083 server = ses->server;
2087 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
2091 req->PersistentFileId = persistent_fid;
2092 req->VolatileFileId = volatile_fid;
2094 iov[0].iov_base = (char *)req;
2095 /* 4 for rfc1002 length field */
2096 iov[0].iov_len = get_rfc1002_length(req) + 4;
2098 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
2101 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
2103 free_rsp_buf(resp_buftype, iov[0].iov_base);
2108 * To form a chain of read requests, any read requests after the first should
2109 * have the end_of_chain boolean set to true.
2112 smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms,
2113 unsigned int remaining_bytes, int request_type)
2116 struct smb2_read_req *req = NULL;
2118 rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req);
2121 if (io_parms->tcon->ses->server == NULL)
2122 return -ECONNABORTED;
2124 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
2126 req->PersistentFileId = io_parms->persistent_fid;
2127 req->VolatileFileId = io_parms->volatile_fid;
2128 req->ReadChannelInfoOffset = 0; /* reserved */
2129 req->ReadChannelInfoLength = 0; /* reserved */
2130 req->Channel = 0; /* reserved */
2131 req->MinimumCount = 0;
2132 req->Length = cpu_to_le32(io_parms->length);
2133 req->Offset = cpu_to_le64(io_parms->offset);
2135 if (request_type & CHAINED_REQUEST) {
2136 if (!(request_type & END_OF_CHAIN)) {
2137 /* 4 for rfc1002 length field */
2138 req->hdr.NextCommand =
2139 cpu_to_le32(get_rfc1002_length(req) + 4);
2140 } else /* END_OF_CHAIN */
2141 req->hdr.NextCommand = 0;
2142 if (request_type & RELATED_REQUEST) {
2143 req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2145 * Related requests use info from previous read request
2148 req->hdr.SessionId = 0xFFFFFFFF;
2149 req->hdr.TreeId = 0xFFFFFFFF;
2150 req->PersistentFileId = 0xFFFFFFFF;
2151 req->VolatileFileId = 0xFFFFFFFF;
2154 if (remaining_bytes > io_parms->length)
2155 req->RemainingBytes = cpu_to_le32(remaining_bytes);
2157 req->RemainingBytes = 0;
2159 iov[0].iov_base = (char *)req;
2160 /* 4 for rfc1002 length field */
2161 iov[0].iov_len = get_rfc1002_length(req) + 4;
2166 smb2_readv_callback(struct mid_q_entry *mid)
2168 struct cifs_readdata *rdata = mid->callback_data;
2169 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
2170 struct TCP_Server_Info *server = tcon->ses->server;
2171 struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base;
2172 unsigned int credits_received = 1;
2173 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
2175 .rq_pages = rdata->pages,
2176 .rq_npages = rdata->nr_pages,
2177 .rq_pagesz = rdata->pagesz,
2178 .rq_tailsz = rdata->tailsz };
2180 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2181 __func__, mid->mid, mid->mid_state, rdata->result,
2184 switch (mid->mid_state) {
2185 case MID_RESPONSE_RECEIVED:
2186 credits_received = le16_to_cpu(buf->CreditRequest);
2187 /* result already set, check signature */
2191 rc = smb2_verify_signature(&rqst, server);
2193 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
2196 /* FIXME: should this be counted toward the initiating task? */
2197 task_io_account_read(rdata->got_bytes);
2198 cifs_stats_bytes_read(tcon, rdata->got_bytes);
2200 case MID_REQUEST_SUBMITTED:
2201 case MID_RETRY_NEEDED:
2202 rdata->result = -EAGAIN;
2203 if (server->sign && rdata->got_bytes)
2204 /* reset bytes number since we can not check a sign */
2205 rdata->got_bytes = 0;
2206 /* FIXME: should this be counted toward the initiating task? */
2207 task_io_account_read(rdata->got_bytes);
2208 cifs_stats_bytes_read(tcon, rdata->got_bytes);
2211 if (rdata->result != -ENODATA)
2212 rdata->result = -EIO;
2216 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
2218 queue_work(cifsiod_wq, &rdata->work);
2219 mutex_lock(&server->srv_mutex);
2220 DeleteMidQEntry(mid);
2221 mutex_unlock(&server->srv_mutex);
2222 add_credits(server, credits_received, 0);
2225 /* smb2_async_readv - send an async write, and set up mid to handle result */
2227 smb2_async_readv(struct cifs_readdata *rdata)
2230 struct smb2_hdr *buf;
2231 struct cifs_io_parms io_parms;
2232 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
2234 struct TCP_Server_Info *server;
2236 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
2237 __func__, rdata->offset, rdata->bytes);
2239 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
2240 io_parms.offset = rdata->offset;
2241 io_parms.length = rdata->bytes;
2242 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
2243 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
2244 io_parms.pid = rdata->pid;
2246 server = io_parms.tcon->ses->server;
2248 rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0);
2250 if (rc == -EAGAIN && rdata->credits) {
2251 /* credits was reset by reconnect */
2253 /* reduce in_flight value since we won't send the req */
2254 spin_lock(&server->req_lock);
2255 server->in_flight--;
2256 spin_unlock(&server->req_lock);
2261 buf = (struct smb2_hdr *)rdata->iov.iov_base;
2262 /* 4 for rfc1002 length field */
2263 rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4;
2265 if (rdata->credits) {
2266 buf->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
2267 SMB2_MAX_BUFFER_SIZE));
2268 buf->CreditRequest = buf->CreditCharge;
2269 spin_lock(&server->req_lock);
2270 server->credits += rdata->credits -
2271 le16_to_cpu(buf->CreditCharge);
2272 spin_unlock(&server->req_lock);
2273 wake_up(&server->request_q);
2274 flags = CIFS_HAS_CREDITS;
2277 kref_get(&rdata->refcount);
2278 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
2279 cifs_readv_receive, smb2_readv_callback,
2282 kref_put(&rdata->refcount, cifs_readdata_release);
2283 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
2286 cifs_small_buf_release(buf);
2291 SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
2292 unsigned int *nbytes, char **buf, int *buf_type)
2294 int resp_buftype, rc = -EACCES;
2295 struct smb2_read_rsp *rsp = NULL;
2299 rc = smb2_new_read_req(iov, io_parms, 0, 0);
2303 rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1,
2304 &resp_buftype, CIFS_LOG_ERROR);
2306 rsp = (struct smb2_read_rsp *)iov[0].iov_base;
2308 if (rsp->hdr.Status == STATUS_END_OF_FILE) {
2309 free_rsp_buf(resp_buftype, iov[0].iov_base);
2314 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
2315 cifs_dbg(VFS, "Send error in read = %d\n", rc);
2317 *nbytes = le32_to_cpu(rsp->DataLength);
2318 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
2319 (*nbytes > io_parms->length)) {
2320 cifs_dbg(FYI, "bad length %d for count %d\n",
2321 *nbytes, io_parms->length);
2328 memcpy(*buf, (char *)&rsp->hdr.ProtocolId + rsp->DataOffset,
2330 free_rsp_buf(resp_buftype, iov[0].iov_base);
2331 } else if (resp_buftype != CIFS_NO_BUFFER) {
2332 *buf = iov[0].iov_base;
2333 if (resp_buftype == CIFS_SMALL_BUFFER)
2334 *buf_type = CIFS_SMALL_BUFFER;
2335 else if (resp_buftype == CIFS_LARGE_BUFFER)
2336 *buf_type = CIFS_LARGE_BUFFER;
2342 * Check the mid_state and signature on received buffer (if any), and queue the
2343 * workqueue completion task.
2346 smb2_writev_callback(struct mid_q_entry *mid)
2348 struct cifs_writedata *wdata = mid->callback_data;
2349 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
2350 struct TCP_Server_Info *server = tcon->ses->server;
2351 unsigned int written;
2352 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
2353 unsigned int credits_received = 1;
2355 switch (mid->mid_state) {
2356 case MID_RESPONSE_RECEIVED:
2357 credits_received = le16_to_cpu(rsp->hdr.CreditRequest);
2358 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
2359 if (wdata->result != 0)
2362 written = le32_to_cpu(rsp->DataLength);
2364 * Mask off high 16 bits when bytes written as returned
2365 * by the server is greater than bytes requested by the
2366 * client. OS/2 servers are known to set incorrect
2369 if (written > wdata->bytes)
2372 if (written < wdata->bytes)
2373 wdata->result = -ENOSPC;
2375 wdata->bytes = written;
2377 case MID_REQUEST_SUBMITTED:
2378 case MID_RETRY_NEEDED:
2379 wdata->result = -EAGAIN;
2382 wdata->result = -EIO;
2387 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2389 queue_work(cifsiod_wq, &wdata->work);
2390 mutex_lock(&server->srv_mutex);
2391 DeleteMidQEntry(mid);
2392 mutex_unlock(&server->srv_mutex);
2393 add_credits(tcon->ses->server, credits_received, 0);
2396 /* smb2_async_writev - send an async write, and set up mid to handle result */
2398 smb2_async_writev(struct cifs_writedata *wdata,
2399 void (*release)(struct kref *kref))
2401 int rc = -EACCES, flags = 0;
2402 struct smb2_write_req *req = NULL;
2403 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
2404 struct TCP_Server_Info *server = tcon->ses->server;
2406 struct smb_rqst rqst;
2408 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
2410 if (rc == -EAGAIN && wdata->credits) {
2411 /* credits was reset by reconnect */
2413 /* reduce in_flight value since we won't send the req */
2414 spin_lock(&server->req_lock);
2415 server->in_flight--;
2416 spin_unlock(&server->req_lock);
2418 goto async_writev_out;
2421 req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid);
2423 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
2424 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
2425 req->WriteChannelInfoOffset = 0;
2426 req->WriteChannelInfoLength = 0;
2428 req->Offset = cpu_to_le64(wdata->offset);
2429 /* 4 for rfc1002 length field */
2430 req->DataOffset = cpu_to_le16(
2431 offsetof(struct smb2_write_req, Buffer) - 4);
2432 req->RemainingBytes = 0;
2434 /* 4 for rfc1002 length field and 1 for Buffer */
2435 iov.iov_len = get_rfc1002_length(req) + 4 - 1;
2440 rqst.rq_pages = wdata->pages;
2441 rqst.rq_npages = wdata->nr_pages;
2442 rqst.rq_pagesz = wdata->pagesz;
2443 rqst.rq_tailsz = wdata->tailsz;
2445 cifs_dbg(FYI, "async write at %llu %u bytes\n",
2446 wdata->offset, wdata->bytes);
2448 req->Length = cpu_to_le32(wdata->bytes);
2450 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
2452 if (wdata->credits) {
2453 req->hdr.CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
2454 SMB2_MAX_BUFFER_SIZE));
2455 req->hdr.CreditRequest = req->hdr.CreditCharge;
2456 spin_lock(&server->req_lock);
2457 server->credits += wdata->credits -
2458 le16_to_cpu(req->hdr.CreditCharge);
2459 spin_unlock(&server->req_lock);
2460 wake_up(&server->request_q);
2461 flags = CIFS_HAS_CREDITS;
2464 kref_get(&wdata->refcount);
2465 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, wdata,
2469 kref_put(&wdata->refcount, release);
2470 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2474 cifs_small_buf_release(req);
2479 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2480 * The length field from io_parms must be at least 1 and indicates a number of
2481 * elements with data to write that begins with position 1 in iov array. All
2482 * data length is specified by count.
2485 SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
2486 unsigned int *nbytes, struct kvec *iov, int n_vec)
2489 struct smb2_write_req *req = NULL;
2490 struct smb2_write_rsp *rsp = NULL;
2497 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
2501 if (io_parms->tcon->ses->server == NULL)
2502 return -ECONNABORTED;
2504 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
2506 req->PersistentFileId = io_parms->persistent_fid;
2507 req->VolatileFileId = io_parms->volatile_fid;
2508 req->WriteChannelInfoOffset = 0;
2509 req->WriteChannelInfoLength = 0;
2511 req->Length = cpu_to_le32(io_parms->length);
2512 req->Offset = cpu_to_le64(io_parms->offset);
2513 /* 4 for rfc1002 length field */
2514 req->DataOffset = cpu_to_le16(
2515 offsetof(struct smb2_write_req, Buffer) - 4);
2516 req->RemainingBytes = 0;
2518 iov[0].iov_base = (char *)req;
2519 /* 4 for rfc1002 length field and 1 for Buffer */
2520 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2522 /* length of entire message including data to be written */
2523 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
2525 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
2527 rsp = (struct smb2_write_rsp *)iov[0].iov_base;
2530 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
2531 cifs_dbg(VFS, "Send error in write = %d\n", rc);
2533 *nbytes = le32_to_cpu(rsp->DataLength);
2535 free_rsp_buf(resp_buftype, rsp);
2540 num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
2543 unsigned int entrycount = 0;
2544 unsigned int next_offset = 0;
2545 FILE_DIRECTORY_INFO *entryptr;
2547 if (bufstart == NULL)
2550 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
2553 entryptr = (FILE_DIRECTORY_INFO *)
2554 ((char *)entryptr + next_offset);
2556 if ((char *)entryptr + size > end_of_buf) {
2557 cifs_dbg(VFS, "malformed search entry would overflow\n");
2561 len = le32_to_cpu(entryptr->FileNameLength);
2562 if ((char *)entryptr + len + size > end_of_buf) {
2563 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
2568 *lastentry = (char *)entryptr;
2571 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
2583 SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
2584 u64 persistent_fid, u64 volatile_fid, int index,
2585 struct cifs_search_info *srch_inf)
2587 struct smb2_query_directory_req *req;
2588 struct smb2_query_directory_rsp *rsp = NULL;
2592 int resp_buftype = CIFS_NO_BUFFER;
2593 unsigned char *bufptr;
2594 struct TCP_Server_Info *server;
2595 struct cifs_ses *ses = tcon->ses;
2596 __le16 asteriks = cpu_to_le16('*');
2598 unsigned int output_size = CIFSMaxBufSize;
2599 size_t info_buf_size;
2601 if (ses && (ses->server))
2602 server = ses->server;
2606 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
2610 switch (srch_inf->info_level) {
2611 case SMB_FIND_FILE_DIRECTORY_INFO:
2612 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
2613 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
2615 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
2616 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
2617 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
2620 cifs_dbg(VFS, "info level %u isn't supported\n",
2621 srch_inf->info_level);
2626 req->FileIndex = cpu_to_le32(index);
2627 req->PersistentFileId = persistent_fid;
2628 req->VolatileFileId = volatile_fid;
2631 bufptr = req->Buffer;
2632 memcpy(bufptr, &asteriks, len);
2634 req->FileNameOffset =
2635 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
2636 req->FileNameLength = cpu_to_le16(len);
2638 * BB could be 30 bytes or so longer if we used SMB2 specific
2639 * buffer lengths, but this is safe and close enough.
2641 output_size = min_t(unsigned int, output_size, server->maxBuf);
2642 output_size = min_t(unsigned int, output_size, 2 << 15);
2643 req->OutputBufferLength = cpu_to_le32(output_size);
2645 iov[0].iov_base = (char *)req;
2646 /* 4 for RFC1001 length and 1 for Buffer */
2647 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2649 iov[1].iov_base = (char *)(req->Buffer);
2650 iov[1].iov_len = len;
2652 inc_rfc1001_len(req, len - 1 /* Buffer */);
2654 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
2655 rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base;
2658 if (rc == -ENODATA && rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2659 srch_inf->endOfSearch = true;
2662 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
2666 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2667 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2672 srch_inf->unicode = true;
2674 if (srch_inf->ntwrk_buf_start) {
2675 if (srch_inf->smallBuf)
2676 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
2678 cifs_buf_release(srch_inf->ntwrk_buf_start);
2680 srch_inf->ntwrk_buf_start = (char *)rsp;
2681 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
2682 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
2683 /* 4 for rfc1002 length field */
2684 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
2685 srch_inf->entries_in_buffer =
2686 num_entries(srch_inf->srch_entries_start, end_of_smb,
2687 &srch_inf->last_entry, info_buf_size);
2688 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
2689 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
2690 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
2691 srch_inf->srch_entries_start, srch_inf->last_entry);
2692 if (resp_buftype == CIFS_LARGE_BUFFER)
2693 srch_inf->smallBuf = false;
2694 else if (resp_buftype == CIFS_SMALL_BUFFER)
2695 srch_inf->smallBuf = true;
2697 cifs_dbg(VFS, "illegal search buffer type\n");
2702 free_rsp_buf(resp_buftype, rsp);
2707 send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2708 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
2709 unsigned int num, void **data, unsigned int *size)
2711 struct smb2_set_info_req *req;
2712 struct smb2_set_info_rsp *rsp = NULL;
2717 struct TCP_Server_Info *server;
2718 struct cifs_ses *ses = tcon->ses;
2720 if (ses && (ses->server))
2721 server = ses->server;
2728 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
2732 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
2738 req->hdr.ProcessId = cpu_to_le32(pid);
2740 req->InfoType = SMB2_O_INFO_FILE;
2741 req->FileInfoClass = info_class;
2742 req->PersistentFileId = persistent_fid;
2743 req->VolatileFileId = volatile_fid;
2745 /* 4 for RFC1001 length and 1 for Buffer */
2747 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
2748 req->BufferLength = cpu_to_le32(*size);
2750 inc_rfc1001_len(req, *size - 1 /* Buffer */);
2752 memcpy(req->Buffer, *data, *size);
2754 iov[0].iov_base = (char *)req;
2755 /* 4 for RFC1001 length */
2756 iov[0].iov_len = get_rfc1002_length(req) + 4;
2758 for (i = 1; i < num; i++) {
2759 inc_rfc1001_len(req, size[i]);
2760 le32_add_cpu(&req->BufferLength, size[i]);
2761 iov[i].iov_base = (char *)data[i];
2762 iov[i].iov_len = size[i];
2765 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0);
2766 rsp = (struct smb2_set_info_rsp *)iov[0].iov_base;
2769 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
2771 free_rsp_buf(resp_buftype, rsp);
2777 SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
2778 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2780 struct smb2_file_rename_info info;
2782 unsigned int size[2];
2784 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2786 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2790 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
2791 /* 0 = fail if target already exists */
2792 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2793 info.FileNameLength = cpu_to_le32(len);
2796 size[0] = sizeof(struct smb2_file_rename_info);
2798 data[1] = target_file;
2799 size[1] = len + 2 /* null */;
2801 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
2802 current->tgid, FILE_RENAME_INFORMATION, 2, data,
2809 SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
2810 u64 persistent_fid, u64 volatile_fid)
2812 __u8 delete_pending = 1;
2816 data = &delete_pending;
2817 size = 1; /* sizeof __u8 */
2819 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2820 current->tgid, FILE_DISPOSITION_INFORMATION, 1, &data,
2825 SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
2826 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2828 struct smb2_file_link_info info;
2830 unsigned int size[2];
2832 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2834 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2838 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
2839 /* 0 = fail if link already exists */
2840 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2841 info.FileNameLength = cpu_to_le32(len);
2844 size[0] = sizeof(struct smb2_file_link_info);
2846 data[1] = target_file;
2847 size[1] = len + 2 /* null */;
2849 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
2850 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
2856 SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2857 u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc)
2859 struct smb2_file_eof_info info;
2863 info.EndOfFile = *eof;
2866 size = sizeof(struct smb2_file_eof_info);
2869 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2870 pid, FILE_ALLOCATION_INFORMATION, 1, &data, &size);
2872 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2873 pid, FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
2877 SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2878 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
2881 size = sizeof(FILE_BASIC_INFO);
2882 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2883 current->tgid, FILE_BASIC_INFORMATION, 1,
2884 (void **)&buf, &size);
2888 SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
2889 const u64 persistent_fid, const u64 volatile_fid,
2893 struct smb2_oplock_break *req = NULL;
2895 cifs_dbg(FYI, "SMB2_oplock_break\n");
2896 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2901 req->VolatileFid = volatile_fid;
2902 req->PersistentFid = persistent_fid;
2903 req->OplockLevel = oplock_level;
2904 req->hdr.CreditRequest = cpu_to_le16(1);
2906 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2907 /* SMB2 buffer freed by function above */
2910 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2911 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
2918 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
2919 struct kstatfs *kst)
2921 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
2922 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
2923 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
2924 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
2925 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
2930 build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
2931 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
2934 struct smb2_query_info_req *req;
2936 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
2938 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
2941 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2945 req->InfoType = SMB2_O_INFO_FILESYSTEM;
2946 req->FileInfoClass = level;
2947 req->PersistentFileId = persistent_fid;
2948 req->VolatileFileId = volatile_fid;
2949 /* 4 for rfc1002 length field and 1 for pad */
2950 req->InputBufferOffset =
2951 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
2952 req->OutputBufferLength = cpu_to_le32(
2953 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
2955 iov->iov_base = (char *)req;
2956 /* 4 for rfc1002 length field */
2957 iov->iov_len = get_rfc1002_length(req) + 4;
2962 SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
2963 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
2965 struct smb2_query_info_rsp *rsp = NULL;
2969 struct cifs_ses *ses = tcon->ses;
2970 struct smb2_fs_full_size_info *info = NULL;
2972 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
2973 sizeof(struct smb2_fs_full_size_info),
2974 persistent_fid, volatile_fid);
2978 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2980 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2983 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2985 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
2986 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
2987 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2988 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2989 sizeof(struct smb2_fs_full_size_info));
2991 copy_fs_info_to_kstatfs(info, fsdata);
2994 free_rsp_buf(resp_buftype, iov.iov_base);
2999 SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
3000 u64 persistent_fid, u64 volatile_fid, int level)
3002 struct smb2_query_info_rsp *rsp = NULL;
3005 int resp_buftype, max_len, min_len;
3006 struct cifs_ses *ses = tcon->ses;
3007 unsigned int rsp_len, offset;
3009 if (level == FS_DEVICE_INFORMATION) {
3010 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3011 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3012 } else if (level == FS_ATTRIBUTE_INFORMATION) {
3013 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
3014 min_len = MIN_FS_ATTR_INFO_SIZE;
3015 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
3016 max_len = sizeof(struct smb3_fs_ss_info);
3017 min_len = sizeof(struct smb3_fs_ss_info);
3019 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
3023 rc = build_qfs_info_req(&iov, tcon, level, max_len,
3024 persistent_fid, volatile_fid);
3028 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
3030 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
3033 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
3035 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
3036 offset = le16_to_cpu(rsp->OutputBufferOffset);
3037 rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
3041 if (level == FS_ATTRIBUTE_INFORMATION)
3042 memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
3043 + (char *)&rsp->hdr, min_t(unsigned int,
3045 else if (level == FS_DEVICE_INFORMATION)
3046 memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
3047 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
3048 else if (level == FS_SECTOR_SIZE_INFORMATION) {
3049 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
3050 (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
3051 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
3052 tcon->perf_sector_size =
3053 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
3057 free_rsp_buf(resp_buftype, iov.iov_base);
3062 smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
3063 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3064 const __u32 num_lock, struct smb2_lock_element *buf)
3067 struct smb2_lock_req *req = NULL;
3072 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
3074 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
3078 req->hdr.ProcessId = cpu_to_le32(pid);
3079 req->LockCount = cpu_to_le16(num_lock);
3081 req->PersistentFileId = persist_fid;
3082 req->VolatileFileId = volatile_fid;
3084 count = num_lock * sizeof(struct smb2_lock_element);
3085 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
3087 iov[0].iov_base = (char *)req;
3088 /* 4 for rfc1002 length field and count for all locks */
3089 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
3090 iov[1].iov_base = (char *)buf;
3091 iov[1].iov_len = count;
3093 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
3094 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP);
3096 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
3097 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
3104 SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
3105 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3106 const __u64 length, const __u64 offset, const __u32 lock_flags,
3109 struct smb2_lock_element lock;
3111 lock.Offset = cpu_to_le64(offset);
3112 lock.Length = cpu_to_le64(length);
3113 lock.Flags = cpu_to_le32(lock_flags);
3114 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
3115 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
3117 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
3121 SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
3122 __u8 *lease_key, const __le32 lease_state)
3125 struct smb2_lease_ack *req = NULL;
3127 cifs_dbg(FYI, "SMB2_lease_break\n");
3128 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
3133 req->hdr.CreditRequest = cpu_to_le16(1);
3134 req->StructureSize = cpu_to_le16(36);
3135 inc_rfc1001_len(req, 12);
3137 memcpy(req->LeaseKey, lease_key, 16);
3138 req->LeaseState = lease_state;
3140 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
3141 /* SMB2 buffer freed by function above */
3144 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
3145 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);