4 * Copyright (C) International Business Machines Corp., 2009, 2013
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
9 * Contains the routines for constructing the SMB2 PDUs themselves
11 * This library is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published
13 * by the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
19 * the GNU Lesser General Public License for more details.
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
27 /* Note that there are handle based routines which must be */
28 /* treated slightly differently for reconnection purposes since we never */
29 /* want to reuse a stale file handle and only the caller knows the file info */
32 #include <linux/kernel.h>
33 #include <linux/vfs.h>
34 #include <linux/task_io_accounting_ops.h>
35 #include <linux/uaccess.h>
36 #include <linux/pagemap.h>
37 #include <linux/xattr.h>
41 #include "cifsproto.h"
42 #include "smb2proto.h"
43 #include "cifs_unicode.h"
44 #include "cifs_debug.h"
46 #include "smb2status.h"
51 * The following table defines the expected "StructureSize" of SMB2 requests
52 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
54 * Note that commands are defined in smb2pdu.h in le16 but the array below is
55 * indexed by command in host byte order.
57 static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
58 /* SMB2_NEGOTIATE */ 36,
59 /* SMB2_SESSION_SETUP */ 25,
61 /* SMB2_TREE_CONNECT */ 9,
62 /* SMB2_TREE_DISCONNECT */ 4,
72 /* SMB2_QUERY_DIRECTORY */ 33,
73 /* SMB2_CHANGE_NOTIFY */ 32,
74 /* SMB2_QUERY_INFO */ 41,
75 /* SMB2_SET_INFO */ 33,
76 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
81 smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd /* command */ ,
82 const struct cifs_tcon *tcon)
84 struct smb2_pdu *pdu = (struct smb2_pdu *)hdr;
85 char *temp = (char *)hdr;
86 /* lookup word count ie StructureSize from table */
87 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_cmd)];
90 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
91 * largest operations (Create)
95 /* Note this is only network field converted to big endian */
96 hdr->smb2_buf_length = cpu_to_be32(parmsize + sizeof(struct smb2_hdr)
97 - 4 /* RFC 1001 length field itself not counted */);
99 hdr->ProtocolId[0] = 0xFE;
100 hdr->ProtocolId[1] = 'S';
101 hdr->ProtocolId[2] = 'M';
102 hdr->ProtocolId[3] = 'B';
103 hdr->StructureSize = cpu_to_le16(64);
104 hdr->Command = smb2_cmd;
105 hdr->CreditRequest = cpu_to_le16(2); /* BB make this dynamic */
106 hdr->ProcessId = cpu_to_le32((__u16)current->tgid);
111 /* BB FIXME when we do write > 64K add +1 for every 64K in req or rsp */
112 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
113 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
114 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)
115 hdr->CreditCharge = cpu_to_le16(1);
116 /* else CreditCharge MBZ */
118 hdr->TreeId = tcon->tid;
119 /* Uid is not converted */
121 hdr->SessionId = tcon->ses->Suid;
122 /* BB check following DFS flags BB */
123 /* BB do we have to add check for SHI1005_FLAGS_DFS_ROOT too? */
124 if (tcon->share_flags & SHI1005_FLAGS_DFS)
125 hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS;
126 /* BB how does SMB2 do case sensitive? */
128 hdr->Flags |= SMBFLG_CASELESS; */
129 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign)
130 hdr->Flags |= SMB2_FLAGS_SIGNED;
132 pdu->StructureSize2 = cpu_to_le16(parmsize);
137 smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
140 struct nls_table *nls_codepage;
141 struct cifs_ses *ses;
142 struct TCP_Server_Info *server;
145 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
146 * check for tcp and smb session status done differently
147 * for those three - in the calling routine.
152 if (smb2_command == SMB2_TREE_CONNECT)
155 if (tcon->tidStatus == CifsExiting) {
157 * only tree disconnect, open, and write,
158 * (and ulogoff which does not have tcon)
159 * are allowed as we start force umount.
161 if ((smb2_command != SMB2_WRITE) &&
162 (smb2_command != SMB2_CREATE) &&
163 (smb2_command != SMB2_TREE_DISCONNECT)) {
164 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
169 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
170 (!tcon->ses->server))
174 server = ses->server;
177 * Give demultiplex thread up to 10 seconds to reconnect, should be
178 * greater than cifs socket timeout which is 7 seconds
180 while (server->tcpStatus == CifsNeedReconnect) {
182 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
183 * here since they are implicitly done when session drops.
185 switch (smb2_command) {
187 * BB Should we keep oplock break and add flush to exceptions?
189 case SMB2_TREE_DISCONNECT:
192 case SMB2_OPLOCK_BREAK:
196 wait_event_interruptible_timeout(server->response_q,
197 (server->tcpStatus != CifsNeedReconnect), 10 * HZ);
199 /* are we still trying to reconnect? */
200 if (server->tcpStatus != CifsNeedReconnect)
204 * on "soft" mounts we wait once. Hard mounts keep
205 * retrying until process is killed or server comes
209 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
214 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
217 nls_codepage = load_nls_default();
220 * need to prevent multiple threads trying to simultaneously reconnect
221 * the same SMB session
223 mutex_lock(&tcon->ses->session_mutex);
224 rc = cifs_negotiate_protocol(0, tcon->ses);
225 if (!rc && tcon->ses->need_reconnect)
226 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
228 if (rc || !tcon->need_reconnect) {
229 mutex_unlock(&tcon->ses->session_mutex);
233 cifs_mark_open_files_invalid(tcon);
234 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
235 mutex_unlock(&tcon->ses->session_mutex);
236 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
239 atomic_inc(&tconInfoReconnectCount);
241 * BB FIXME add code to check if wsize needs update due to negotiated
242 * smb buffer size shrinking.
246 * Check if handle based operation so we know whether we can continue
247 * or not without returning to caller to reset file handle.
250 * BB Is flush done by server on drop of tcp session? Should we special
251 * case it and skip above?
253 switch (smb2_command) {
259 case SMB2_QUERY_DIRECTORY:
260 case SMB2_CHANGE_NOTIFY:
261 case SMB2_QUERY_INFO:
265 unload_nls(nls_codepage);
270 * Allocate and return pointer to an SMB request hdr, and set basic
271 * SMB information in the SMB header. If the return code is zero, this
272 * function must have filled in request_buf pointer.
275 small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
280 rc = smb2_reconnect(smb2_command, tcon);
284 /* BB eventually switch this to SMB2 specific small buf size */
285 *request_buf = cifs_small_buf_get();
286 if (*request_buf == NULL) {
287 /* BB should we add a retry in here if not a writepage? */
291 smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon);
294 #ifdef CONFIG_CIFS_STATS2
295 uint16_t com_code = le16_to_cpu(smb2_command);
296 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
298 cifs_stats_inc(&tcon->num_smbs_sent);
305 free_rsp_buf(int resp_buftype, void *rsp)
307 if (resp_buftype == CIFS_SMALL_BUFFER)
308 cifs_small_buf_release(rsp);
309 else if (resp_buftype == CIFS_LARGE_BUFFER)
310 cifs_buf_release(rsp);
316 * SMB2 Worker functions follow:
318 * The general structure of the worker functions is:
319 * 1) Call smb2_init (assembles SMB2 header)
320 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
321 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
322 * 4) Decode SMB2 command specific fields in the fixed length area
323 * 5) Decode variable length data area (if any for this SMB2 command type)
324 * 6) Call free smb buffer
330 SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
332 struct smb2_negotiate_req *req;
333 struct smb2_negotiate_rsp *rsp;
337 struct TCP_Server_Info *server = ses->server;
338 int blob_offset, blob_length;
340 int flags = CIFS_NEG_OP;
342 cifs_dbg(FYI, "Negotiate protocol\n");
345 WARN(1, "%s: server is NULL!\n", __func__);
349 rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
353 req->hdr.SessionId = 0;
355 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
357 req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */
358 inc_rfc1001_len(req, 2);
360 /* only one of SMB2 signing flags may be set in SMB2 request */
362 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
363 else if (global_secflags & CIFSSEC_MAY_SIGN)
364 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
366 req->SecurityMode = 0;
368 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
370 memcpy(req->ClientGUID, cifs_client_guid, SMB2_CLIENT_GUID_SIZE);
372 iov[0].iov_base = (char *)req;
373 /* 4 for rfc1002 length field */
374 iov[0].iov_len = get_rfc1002_length(req) + 4;
376 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags);
378 rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base;
380 * No tcon so can't do
381 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
386 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
388 /* BB we may eventually want to match the negotiated vs. requested
389 dialect, even though we are only requesting one at a time */
390 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
391 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
392 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
393 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
394 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
395 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
396 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
397 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
399 cifs_dbg(VFS, "Illegal dialect returned by server %d\n",
400 le16_to_cpu(rsp->DialectRevision));
404 server->dialect = le16_to_cpu(rsp->DialectRevision);
406 /* SMB2 only has an extended negflavor */
407 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
408 server->maxBuf = le32_to_cpu(rsp->MaxTransactSize);
409 server->max_read = le32_to_cpu(rsp->MaxReadSize);
410 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
411 /* BB Do we need to validate the SecurityMode? */
412 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
413 server->capabilities = le32_to_cpu(rsp->Capabilities);
415 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
417 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
419 if (blob_length == 0) {
420 cifs_dbg(VFS, "missing security blob on negprot\n");
425 rc = cifs_enable_signing(server, ses->sign);
426 #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
430 rc = decode_neg_token_init(security_blob, blob_length,
441 free_rsp_buf(resp_buftype, rsp);
446 SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
447 const struct nls_table *nls_cp)
449 struct smb2_sess_setup_req *req;
450 struct smb2_sess_setup_rsp *rsp = NULL;
454 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
455 struct TCP_Server_Info *server = ses->server;
458 char *ntlmssp_blob = NULL;
459 bool use_spnego = false; /* else use raw ntlmssp */
461 cifs_dbg(FYI, "Session Setup\n");
464 WARN(1, "%s: server is NULL!\n", __func__);
469 * If memory allocation is successful, caller of this function
472 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
476 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
477 ses->sectype = RawNTLMSSP;
479 ssetup_ntlmssp_authenticate:
480 if (phase == NtLmChallenge)
481 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
483 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
487 req->hdr.SessionId = 0; /* First session, not a reauthenticate */
488 req->VcNumber = 0; /* MBZ */
489 /* to enable echos and oplocks */
490 req->hdr.CreditRequest = cpu_to_le16(3);
492 /* only one of SMB2 signing flags may be set in SMB2 request */
494 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
495 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
496 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
498 req->SecurityMode = 0;
500 req->Capabilities = 0;
501 req->Channel = 0; /* MBZ */
503 iov[0].iov_base = (char *)req;
504 /* 4 for rfc1002 length field and 1 for pad */
505 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
506 if (phase == NtLmNegotiate) {
507 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
509 if (ntlmssp_blob == NULL) {
513 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
515 /* blob_length = build_spnego_ntlmssp_blob(
517 sizeof(struct _NEGOTIATE_MESSAGE),
519 /* BB eventually need to add this */
520 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
525 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
526 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
527 security_blob = ntlmssp_blob;
529 } else if (phase == NtLmAuthenticate) {
530 req->hdr.SessionId = ses->Suid;
531 ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500,
533 if (ntlmssp_blob == NULL) {
537 rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses,
540 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n",
542 goto ssetup_exit; /* BB double check error handling */
545 /* blob_length = build_spnego_ntlmssp_blob(
549 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
554 security_blob = ntlmssp_blob;
557 cifs_dbg(VFS, "illegal ntlmssp phase\n");
562 /* Testing shows that buffer offset must be at location of Buffer[0] */
563 req->SecurityBufferOffset =
564 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
565 1 /* pad */ - 4 /* rfc1001 len */);
566 req->SecurityBufferLength = cpu_to_le16(blob_length);
567 iov[1].iov_base = security_blob;
568 iov[1].iov_len = blob_length;
570 inc_rfc1001_len(req, blob_length - 1 /* pad */);
572 /* BB add code to build os and lm fields */
574 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype,
575 CIFS_LOG_ERROR | CIFS_NEG_OP);
577 kfree(security_blob);
578 rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base;
579 if (resp_buftype != CIFS_NO_BUFFER &&
580 rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) {
581 if (phase != NtLmNegotiate) {
582 cifs_dbg(VFS, "Unexpected more processing error\n");
585 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
586 le16_to_cpu(rsp->SecurityBufferOffset)) {
587 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
588 le16_to_cpu(rsp->SecurityBufferOffset));
593 /* NTLMSSP Negotiate sent now processing challenge (response) */
594 phase = NtLmChallenge; /* process ntlmssp challenge */
595 rc = 0; /* MORE_PROCESSING is not an error here but expected */
596 ses->Suid = rsp->hdr.SessionId;
597 rc = decode_ntlmssp_challenge(rsp->Buffer,
598 le16_to_cpu(rsp->SecurityBufferLength), ses);
602 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
603 * but at least the raw NTLMSSP case works.
606 * No tcon so can't do
607 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
612 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
614 free_rsp_buf(resp_buftype, rsp);
616 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
617 if ((phase == NtLmChallenge) && (rc == 0))
618 goto ssetup_ntlmssp_authenticate;
623 SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
625 struct smb2_logoff_req *req; /* response is also trivial struct */
627 struct TCP_Server_Info *server;
629 cifs_dbg(FYI, "disconnect session %p\n", ses);
631 if (ses && (ses->server))
632 server = ses->server;
636 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
640 /* since no tcon, smb2_init can not do this, so do here */
641 req->hdr.SessionId = ses->Suid;
643 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
645 rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0);
647 * No tcon so can't do
648 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
653 static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
655 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
658 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
661 SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
662 struct cifs_tcon *tcon, const struct nls_table *cp)
664 struct smb2_tree_connect_req *req;
665 struct smb2_tree_connect_rsp *rsp = NULL;
670 struct TCP_Server_Info *server;
671 __le16 *unc_path = NULL;
673 cifs_dbg(FYI, "TCON\n");
675 if ((ses->server) && tree)
676 server = ses->server;
680 if (tcon && tcon->bad_network_name)
683 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
684 if (unc_path == NULL)
687 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
689 if (unc_path_len < 2) {
694 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
701 /* since no tcon, smb2_init can not do this, so do here */
702 req->hdr.SessionId = ses->Suid;
703 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
704 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
707 iov[0].iov_base = (char *)req;
708 /* 4 for rfc1002 length field and 1 for pad */
709 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
711 /* Testing shows that buffer offset must be at location of Buffer[0] */
712 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
713 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
714 req->PathLength = cpu_to_le16(unc_path_len - 2);
715 iov[1].iov_base = unc_path;
716 iov[1].iov_len = unc_path_len;
718 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
720 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
721 rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base;
725 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
726 tcon->need_reconnect = true;
728 goto tcon_error_exit;
732 ses->ipc_tid = rsp->hdr.TreeId;
736 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
737 cifs_dbg(FYI, "connection to disk share\n");
738 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
740 cifs_dbg(FYI, "connection to pipe share\n");
741 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
743 cifs_dbg(FYI, "connection to printer\n");
745 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
747 goto tcon_error_exit;
750 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
751 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
752 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
753 tcon->tidStatus = CifsGood;
754 tcon->need_reconnect = false;
755 tcon->tid = rsp->hdr.TreeId;
756 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
758 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
759 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
760 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
763 free_rsp_buf(resp_buftype, rsp);
768 if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) {
769 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
770 tcon->bad_network_name = true;
776 SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
778 struct smb2_tree_disconnect_req *req; /* response is trivial */
780 struct TCP_Server_Info *server;
781 struct cifs_ses *ses = tcon->ses;
783 cifs_dbg(FYI, "Tree Disconnect\n");
785 if (ses && (ses->server))
786 server = ses->server;
790 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
793 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
797 rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0);
799 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
804 static struct create_lease *
805 create_lease_buf(u8 *lease_key, u8 oplock)
807 struct create_lease *buf;
809 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
813 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
814 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
815 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
816 buf->lcontext.LeaseState = SMB2_LEASE_WRITE_CACHING |
817 SMB2_LEASE_READ_CACHING;
818 else if (oplock == SMB2_OPLOCK_LEVEL_II)
819 buf->lcontext.LeaseState = SMB2_LEASE_READ_CACHING;
820 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
821 buf->lcontext.LeaseState = SMB2_LEASE_HANDLE_CACHING |
822 SMB2_LEASE_READ_CACHING |
823 SMB2_LEASE_WRITE_CACHING;
825 buf->ccontext.DataOffset = cpu_to_le16(offsetof
826 (struct create_lease, lcontext));
827 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
828 buf->ccontext.NameOffset = cpu_to_le16(offsetof
829 (struct create_lease, Name));
830 buf->ccontext.NameLength = cpu_to_le16(4);
839 parse_lease_state(struct smb2_create_rsp *rsp)
842 struct create_lease *lc;
845 data_offset = (char *)rsp;
846 data_offset += 4 + le32_to_cpu(rsp->CreateContextsOffset);
847 lc = (struct create_lease *)data_offset;
849 char *name = le16_to_cpu(lc->ccontext.NameOffset) + (char *)lc;
850 if (le16_to_cpu(lc->ccontext.NameLength) != 4 ||
851 strncmp(name, "RqLs", 4)) {
852 lc = (struct create_lease *)((char *)lc
853 + le32_to_cpu(lc->ccontext.Next));
856 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
857 return SMB2_OPLOCK_LEVEL_NOCHANGE;
860 } while (le32_to_cpu(lc->ccontext.Next) != 0);
865 return smb2_map_lease_to_oplock(lc->lcontext.LeaseState);
869 SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path,
870 u64 *persistent_fid, u64 *volatile_fid, __u32 desired_access,
871 __u32 create_disposition, __u32 file_attributes, __u32 create_options,
872 __u8 *oplock, struct smb2_file_all_info *buf)
874 struct smb2_create_req *req;
875 struct smb2_create_rsp *rsp;
876 struct TCP_Server_Info *server;
877 struct cifs_ses *ses = tcon->ses;
881 __le16 *copy_path = NULL;
886 cifs_dbg(FYI, "create/open\n");
888 if (ses && (ses->server))
889 server = ses->server;
893 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
897 req->ImpersonationLevel = IL_IMPERSONATION;
898 req->DesiredAccess = cpu_to_le32(desired_access);
899 /* File attributes ignored on open (used in create though) */
900 req->FileAttributes = cpu_to_le32(file_attributes);
901 req->ShareAccess = FILE_SHARE_ALL_LE;
902 req->CreateDisposition = cpu_to_le32(create_disposition);
903 req->CreateOptions = cpu_to_le32(create_options);
904 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
905 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)
906 - 8 /* pad */ - 4 /* do not count rfc1001 len field */);
908 iov[0].iov_base = (char *)req;
909 /* 4 for rfc1002 length field */
910 iov[0].iov_len = get_rfc1002_length(req) + 4;
912 /* MUST set path len (NameLength) to 0 opening root of share */
913 if (uni_path_len >= 4) {
914 req->NameLength = cpu_to_le16(uni_path_len - 2);
915 /* -1 since last byte is buf[0] which is sent below (path) */
917 if (uni_path_len % 8 != 0) {
918 copy_size = uni_path_len / 8 * 8;
919 if (copy_size < uni_path_len)
922 copy_path = kzalloc(copy_size, GFP_KERNEL);
925 memcpy((char *)copy_path, (const char *)path,
927 uni_path_len = copy_size;
931 iov[1].iov_len = uni_path_len;
932 iov[1].iov_base = path;
934 * -1 since last byte is buf[0] which was counted in
937 inc_rfc1001_len(req, uni_path_len - 1);
940 req->hdr.smb2_buf_length = cpu_to_be32(be32_to_cpu(
941 req->hdr.smb2_buf_length) + 8 - 1);
946 if (!server->oplocks)
947 *oplock = SMB2_OPLOCK_LEVEL_NONE;
949 if (!(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
950 *oplock == SMB2_OPLOCK_LEVEL_NONE)
951 req->RequestedOplockLevel = *oplock;
953 iov[num_iovecs].iov_base = create_lease_buf(oplock+1, *oplock);
954 if (iov[num_iovecs].iov_base == NULL) {
955 cifs_small_buf_release(req);
959 iov[num_iovecs].iov_len = sizeof(struct create_lease);
960 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
961 req->CreateContextsOffset = cpu_to_le32(
962 sizeof(struct smb2_create_req) - 4 - 8 +
963 iov[num_iovecs-1].iov_len);
964 req->CreateContextsLength = cpu_to_le32(
965 sizeof(struct create_lease));
966 inc_rfc1001_len(&req->hdr, sizeof(struct create_lease));
970 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
971 rsp = (struct smb2_create_rsp *)iov[0].iov_base;
974 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
978 *persistent_fid = rsp->PersistentFileId;
979 *volatile_fid = rsp->VolatileFileId;
982 memcpy(buf, &rsp->CreationTime, 32);
983 buf->AllocationSize = rsp->AllocationSize;
984 buf->EndOfFile = rsp->EndofFile;
985 buf->Attributes = rsp->FileAttributes;
986 buf->NumberOfLinks = cpu_to_le32(1);
987 buf->DeletePending = 0;
990 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
991 *oplock = parse_lease_state(rsp);
993 *oplock = rsp->OplockLevel;
996 free_rsp_buf(resp_buftype, rsp);
1001 SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1002 u64 persistent_fid, u64 volatile_fid)
1004 struct smb2_close_req *req;
1005 struct smb2_close_rsp *rsp;
1006 struct TCP_Server_Info *server;
1007 struct cifs_ses *ses = tcon->ses;
1012 cifs_dbg(FYI, "Close\n");
1014 if (ses && (ses->server))
1015 server = ses->server;
1019 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1023 req->PersistentFileId = persistent_fid;
1024 req->VolatileFileId = volatile_fid;
1026 iov[0].iov_base = (char *)req;
1027 /* 4 for rfc1002 length field */
1028 iov[0].iov_len = get_rfc1002_length(req) + 4;
1030 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1031 rsp = (struct smb2_close_rsp *)iov[0].iov_base;
1035 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
1039 /* BB FIXME - decode close response, update inode for caching */
1042 free_rsp_buf(resp_buftype, rsp);
1047 validate_buf(unsigned int offset, unsigned int buffer_length,
1048 struct smb2_hdr *hdr, unsigned int min_buf_size)
1051 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
1052 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
1053 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1054 char *end_of_buf = begin_of_buf + buffer_length;
1057 if (buffer_length < min_buf_size) {
1058 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
1059 buffer_length, min_buf_size);
1063 /* check if beyond RFC1001 maximum length */
1064 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
1065 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
1066 buffer_length, smb_len);
1070 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
1071 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
1079 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1080 * Caller must free buffer.
1083 validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
1084 struct smb2_hdr *hdr, unsigned int minbufsize,
1088 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1094 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
1098 memcpy(data, begin_of_buf, buffer_length);
1104 query_info(const unsigned int xid, struct cifs_tcon *tcon,
1105 u64 persistent_fid, u64 volatile_fid, u8 info_class,
1106 size_t output_len, size_t min_len, void *data)
1108 struct smb2_query_info_req *req;
1109 struct smb2_query_info_rsp *rsp = NULL;
1113 struct TCP_Server_Info *server;
1114 struct cifs_ses *ses = tcon->ses;
1116 cifs_dbg(FYI, "Query Info\n");
1118 if (ses && (ses->server))
1119 server = ses->server;
1123 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
1127 req->InfoType = SMB2_O_INFO_FILE;
1128 req->FileInfoClass = info_class;
1129 req->PersistentFileId = persistent_fid;
1130 req->VolatileFileId = volatile_fid;
1131 /* 4 for rfc1002 length field and 1 for Buffer */
1132 req->InputBufferOffset =
1133 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
1134 req->OutputBufferLength = cpu_to_le32(output_len);
1136 iov[0].iov_base = (char *)req;
1137 /* 4 for rfc1002 length field */
1138 iov[0].iov_len = get_rfc1002_length(req) + 4;
1140 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1141 rsp = (struct smb2_query_info_rsp *)iov[0].iov_base;
1144 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
1148 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
1149 le32_to_cpu(rsp->OutputBufferLength),
1150 &rsp->hdr, min_len, data);
1153 free_rsp_buf(resp_buftype, rsp);
1158 SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
1159 u64 persistent_fid, u64 volatile_fid,
1160 struct smb2_file_all_info *data)
1162 return query_info(xid, tcon, persistent_fid, volatile_fid,
1163 FILE_ALL_INFORMATION,
1164 sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
1165 sizeof(struct smb2_file_all_info), data);
1169 SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
1170 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
1172 return query_info(xid, tcon, persistent_fid, volatile_fid,
1173 FILE_INTERNAL_INFORMATION,
1174 sizeof(struct smb2_file_internal_info),
1175 sizeof(struct smb2_file_internal_info), uniqueid);
1179 * This is a no-op for now. We're not really interested in the reply, but
1180 * rather in the fact that the server sent one and that server->lstrp
1183 * FIXME: maybe we should consider checking that the reply matches request?
1186 smb2_echo_callback(struct mid_q_entry *mid)
1188 struct TCP_Server_Info *server = mid->callback_data;
1189 struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf;
1190 unsigned int credits_received = 1;
1192 if (mid->mid_state == MID_RESPONSE_RECEIVED)
1193 credits_received = le16_to_cpu(smb2->hdr.CreditRequest);
1195 DeleteMidQEntry(mid);
1196 add_credits(server, credits_received, CIFS_ECHO_OP);
1200 SMB2_echo(struct TCP_Server_Info *server)
1202 struct smb2_echo_req *req;
1205 struct smb_rqst rqst = { .rq_iov = &iov,
1208 cifs_dbg(FYI, "In echo request\n");
1210 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
1214 req->hdr.CreditRequest = cpu_to_le16(1);
1216 iov.iov_base = (char *)req;
1217 /* 4 for rfc1002 length field */
1218 iov.iov_len = get_rfc1002_length(req) + 4;
1220 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server,
1223 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
1225 cifs_small_buf_release(req);
1230 SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1233 struct smb2_flush_req *req;
1234 struct TCP_Server_Info *server;
1235 struct cifs_ses *ses = tcon->ses;
1240 cifs_dbg(FYI, "Flush\n");
1242 if (ses && (ses->server))
1243 server = ses->server;
1247 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
1251 req->PersistentFileId = persistent_fid;
1252 req->VolatileFileId = volatile_fid;
1254 iov[0].iov_base = (char *)req;
1255 /* 4 for rfc1002 length field */
1256 iov[0].iov_len = get_rfc1002_length(req) + 4;
1258 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1260 if ((rc != 0) && tcon)
1261 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
1263 free_rsp_buf(resp_buftype, iov[0].iov_base);
1268 * To form a chain of read requests, any read requests after the first should
1269 * have the end_of_chain boolean set to true.
1272 smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms,
1273 unsigned int remaining_bytes, int request_type)
1276 struct smb2_read_req *req = NULL;
1278 rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req);
1281 if (io_parms->tcon->ses->server == NULL)
1282 return -ECONNABORTED;
1284 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1286 req->PersistentFileId = io_parms->persistent_fid;
1287 req->VolatileFileId = io_parms->volatile_fid;
1288 req->ReadChannelInfoOffset = 0; /* reserved */
1289 req->ReadChannelInfoLength = 0; /* reserved */
1290 req->Channel = 0; /* reserved */
1291 req->MinimumCount = 0;
1292 req->Length = cpu_to_le32(io_parms->length);
1293 req->Offset = cpu_to_le64(io_parms->offset);
1295 if (request_type & CHAINED_REQUEST) {
1296 if (!(request_type & END_OF_CHAIN)) {
1297 /* 4 for rfc1002 length field */
1298 req->hdr.NextCommand =
1299 cpu_to_le32(get_rfc1002_length(req) + 4);
1300 } else /* END_OF_CHAIN */
1301 req->hdr.NextCommand = 0;
1302 if (request_type & RELATED_REQUEST) {
1303 req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
1305 * Related requests use info from previous read request
1308 req->hdr.SessionId = 0xFFFFFFFF;
1309 req->hdr.TreeId = 0xFFFFFFFF;
1310 req->PersistentFileId = 0xFFFFFFFF;
1311 req->VolatileFileId = 0xFFFFFFFF;
1314 if (remaining_bytes > io_parms->length)
1315 req->RemainingBytes = cpu_to_le32(remaining_bytes);
1317 req->RemainingBytes = 0;
1319 iov[0].iov_base = (char *)req;
1320 /* 4 for rfc1002 length field */
1321 iov[0].iov_len = get_rfc1002_length(req) + 4;
1326 smb2_readv_callback(struct mid_q_entry *mid)
1328 struct cifs_readdata *rdata = mid->callback_data;
1329 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
1330 struct TCP_Server_Info *server = tcon->ses->server;
1331 struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base;
1332 unsigned int credits_received = 1;
1333 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
1335 .rq_pages = rdata->pages,
1336 .rq_npages = rdata->nr_pages,
1337 .rq_pagesz = rdata->pagesz,
1338 .rq_tailsz = rdata->tailsz };
1340 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1341 __func__, mid->mid, mid->mid_state, rdata->result,
1344 switch (mid->mid_state) {
1345 case MID_RESPONSE_RECEIVED:
1346 credits_received = le16_to_cpu(buf->CreditRequest);
1347 /* result already set, check signature */
1351 rc = smb2_verify_signature(&rqst, server);
1353 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
1356 /* FIXME: should this be counted toward the initiating task? */
1357 task_io_account_read(rdata->bytes);
1358 cifs_stats_bytes_read(tcon, rdata->bytes);
1360 case MID_REQUEST_SUBMITTED:
1361 case MID_RETRY_NEEDED:
1362 rdata->result = -EAGAIN;
1365 if (rdata->result != -ENODATA)
1366 rdata->result = -EIO;
1370 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
1372 queue_work(cifsiod_wq, &rdata->work);
1373 DeleteMidQEntry(mid);
1374 add_credits(server, credits_received, 0);
1377 /* smb2_async_readv - send an async write, and set up mid to handle result */
1379 smb2_async_readv(struct cifs_readdata *rdata)
1382 struct smb2_hdr *buf;
1383 struct cifs_io_parms io_parms;
1384 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
1387 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
1388 __func__, rdata->offset, rdata->bytes);
1390 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
1391 io_parms.offset = rdata->offset;
1392 io_parms.length = rdata->bytes;
1393 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
1394 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
1395 io_parms.pid = rdata->pid;
1396 rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0);
1400 buf = (struct smb2_hdr *)rdata->iov.iov_base;
1401 /* 4 for rfc1002 length field */
1402 rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4;
1404 kref_get(&rdata->refcount);
1405 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
1406 cifs_readv_receive, smb2_readv_callback,
1409 kref_put(&rdata->refcount, cifs_readdata_release);
1410 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
1413 cifs_small_buf_release(buf);
1418 SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
1419 unsigned int *nbytes, char **buf, int *buf_type)
1421 int resp_buftype, rc = -EACCES;
1422 struct smb2_read_rsp *rsp = NULL;
1426 rc = smb2_new_read_req(iov, io_parms, 0, 0);
1430 rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1,
1431 &resp_buftype, CIFS_LOG_ERROR);
1433 rsp = (struct smb2_read_rsp *)iov[0].iov_base;
1435 if (rsp->hdr.Status == STATUS_END_OF_FILE) {
1436 free_rsp_buf(resp_buftype, iov[0].iov_base);
1441 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
1442 cifs_dbg(VFS, "Send error in read = %d\n", rc);
1444 *nbytes = le32_to_cpu(rsp->DataLength);
1445 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
1446 (*nbytes > io_parms->length)) {
1447 cifs_dbg(FYI, "bad length %d for count %d\n",
1448 *nbytes, io_parms->length);
1455 memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset,
1457 free_rsp_buf(resp_buftype, iov[0].iov_base);
1458 } else if (resp_buftype != CIFS_NO_BUFFER) {
1459 *buf = iov[0].iov_base;
1460 if (resp_buftype == CIFS_SMALL_BUFFER)
1461 *buf_type = CIFS_SMALL_BUFFER;
1462 else if (resp_buftype == CIFS_LARGE_BUFFER)
1463 *buf_type = CIFS_LARGE_BUFFER;
1469 * Check the mid_state and signature on received buffer (if any), and queue the
1470 * workqueue completion task.
1473 smb2_writev_callback(struct mid_q_entry *mid)
1475 struct cifs_writedata *wdata = mid->callback_data;
1476 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1477 unsigned int written;
1478 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
1479 unsigned int credits_received = 1;
1481 switch (mid->mid_state) {
1482 case MID_RESPONSE_RECEIVED:
1483 credits_received = le16_to_cpu(rsp->hdr.CreditRequest);
1484 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
1485 if (wdata->result != 0)
1488 written = le32_to_cpu(rsp->DataLength);
1490 * Mask off high 16 bits when bytes written as returned
1491 * by the server is greater than bytes requested by the
1492 * client. OS/2 servers are known to set incorrect
1495 if (written > wdata->bytes)
1498 if (written < wdata->bytes)
1499 wdata->result = -ENOSPC;
1501 wdata->bytes = written;
1503 case MID_REQUEST_SUBMITTED:
1504 case MID_RETRY_NEEDED:
1505 wdata->result = -EAGAIN;
1508 wdata->result = -EIO;
1513 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1515 queue_work(cifsiod_wq, &wdata->work);
1516 DeleteMidQEntry(mid);
1517 add_credits(tcon->ses->server, credits_received, 0);
1520 /* smb2_async_writev - send an async write, and set up mid to handle result */
1522 smb2_async_writev(struct cifs_writedata *wdata)
1525 struct smb2_write_req *req = NULL;
1526 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1528 struct smb_rqst rqst;
1530 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
1532 goto async_writev_out;
1534 req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid);
1536 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
1537 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
1538 req->WriteChannelInfoOffset = 0;
1539 req->WriteChannelInfoLength = 0;
1541 req->Offset = cpu_to_le64(wdata->offset);
1542 /* 4 for rfc1002 length field */
1543 req->DataOffset = cpu_to_le16(
1544 offsetof(struct smb2_write_req, Buffer) - 4);
1545 req->RemainingBytes = 0;
1547 /* 4 for rfc1002 length field and 1 for Buffer */
1548 iov.iov_len = get_rfc1002_length(req) + 4 - 1;
1553 rqst.rq_pages = wdata->pages;
1554 rqst.rq_npages = wdata->nr_pages;
1555 rqst.rq_pagesz = wdata->pagesz;
1556 rqst.rq_tailsz = wdata->tailsz;
1558 cifs_dbg(FYI, "async write at %llu %u bytes\n",
1559 wdata->offset, wdata->bytes);
1561 req->Length = cpu_to_le32(wdata->bytes);
1563 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
1565 kref_get(&wdata->refcount);
1566 rc = cifs_call_async(tcon->ses->server, &rqst, NULL,
1567 smb2_writev_callback, wdata, 0);
1570 kref_put(&wdata->refcount, cifs_writedata_release);
1571 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1575 cifs_small_buf_release(req);
1580 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1581 * The length field from io_parms must be at least 1 and indicates a number of
1582 * elements with data to write that begins with position 1 in iov array. All
1583 * data length is specified by count.
1586 SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
1587 unsigned int *nbytes, struct kvec *iov, int n_vec)
1590 struct smb2_write_req *req = NULL;
1591 struct smb2_write_rsp *rsp = NULL;
1598 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
1602 if (io_parms->tcon->ses->server == NULL)
1603 return -ECONNABORTED;
1605 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1607 req->PersistentFileId = io_parms->persistent_fid;
1608 req->VolatileFileId = io_parms->volatile_fid;
1609 req->WriteChannelInfoOffset = 0;
1610 req->WriteChannelInfoLength = 0;
1612 req->Length = cpu_to_le32(io_parms->length);
1613 req->Offset = cpu_to_le64(io_parms->offset);
1614 /* 4 for rfc1002 length field */
1615 req->DataOffset = cpu_to_le16(
1616 offsetof(struct smb2_write_req, Buffer) - 4);
1617 req->RemainingBytes = 0;
1619 iov[0].iov_base = (char *)req;
1620 /* 4 for rfc1002 length field and 1 for Buffer */
1621 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1623 /* length of entire message including data to be written */
1624 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
1626 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
1628 rsp = (struct smb2_write_rsp *)iov[0].iov_base;
1631 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
1632 cifs_dbg(VFS, "Send error in write = %d\n", rc);
1634 *nbytes = le32_to_cpu(rsp->DataLength);
1636 free_rsp_buf(resp_buftype, rsp);
1641 num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
1644 unsigned int entrycount = 0;
1645 unsigned int next_offset = 0;
1646 FILE_DIRECTORY_INFO *entryptr;
1648 if (bufstart == NULL)
1651 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
1654 entryptr = (FILE_DIRECTORY_INFO *)
1655 ((char *)entryptr + next_offset);
1657 if ((char *)entryptr + size > end_of_buf) {
1658 cifs_dbg(VFS, "malformed search entry would overflow\n");
1662 len = le32_to_cpu(entryptr->FileNameLength);
1663 if ((char *)entryptr + len + size > end_of_buf) {
1664 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
1669 *lastentry = (char *)entryptr;
1672 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
1684 SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
1685 u64 persistent_fid, u64 volatile_fid, int index,
1686 struct cifs_search_info *srch_inf)
1688 struct smb2_query_directory_req *req;
1689 struct smb2_query_directory_rsp *rsp = NULL;
1694 unsigned char *bufptr;
1695 struct TCP_Server_Info *server;
1696 struct cifs_ses *ses = tcon->ses;
1697 __le16 asteriks = cpu_to_le16('*');
1699 unsigned int output_size = CIFSMaxBufSize;
1700 size_t info_buf_size;
1702 if (ses && (ses->server))
1703 server = ses->server;
1707 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
1711 switch (srch_inf->info_level) {
1712 case SMB_FIND_FILE_DIRECTORY_INFO:
1713 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
1714 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
1716 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
1717 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
1718 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
1721 cifs_dbg(VFS, "info level %u isn't supported\n",
1722 srch_inf->info_level);
1727 req->FileIndex = cpu_to_le32(index);
1728 req->PersistentFileId = persistent_fid;
1729 req->VolatileFileId = volatile_fid;
1732 bufptr = req->Buffer;
1733 memcpy(bufptr, &asteriks, len);
1735 req->FileNameOffset =
1736 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
1737 req->FileNameLength = cpu_to_le16(len);
1739 * BB could be 30 bytes or so longer if we used SMB2 specific
1740 * buffer lengths, but this is safe and close enough.
1742 output_size = min_t(unsigned int, output_size, server->maxBuf);
1743 output_size = min_t(unsigned int, output_size, 2 << 15);
1744 req->OutputBufferLength = cpu_to_le32(output_size);
1746 iov[0].iov_base = (char *)req;
1747 /* 4 for RFC1001 length and 1 for Buffer */
1748 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1750 iov[1].iov_base = (char *)(req->Buffer);
1751 iov[1].iov_len = len;
1753 inc_rfc1001_len(req, len - 1 /* Buffer */);
1755 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
1756 rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base;
1759 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
1763 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
1764 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
1769 srch_inf->unicode = true;
1771 if (srch_inf->ntwrk_buf_start) {
1772 if (srch_inf->smallBuf)
1773 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
1775 cifs_buf_release(srch_inf->ntwrk_buf_start);
1777 srch_inf->ntwrk_buf_start = (char *)rsp;
1778 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
1779 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
1780 /* 4 for rfc1002 length field */
1781 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
1782 srch_inf->entries_in_buffer =
1783 num_entries(srch_inf->srch_entries_start, end_of_smb,
1784 &srch_inf->last_entry, info_buf_size);
1785 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
1786 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
1787 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
1788 srch_inf->srch_entries_start, srch_inf->last_entry);
1789 if (resp_buftype == CIFS_LARGE_BUFFER)
1790 srch_inf->smallBuf = false;
1791 else if (resp_buftype == CIFS_SMALL_BUFFER)
1792 srch_inf->smallBuf = true;
1794 cifs_dbg(VFS, "illegal search buffer type\n");
1796 if (rsp->hdr.Status == STATUS_NO_MORE_FILES)
1797 srch_inf->endOfSearch = 1;
1799 srch_inf->endOfSearch = 0;
1804 free_rsp_buf(resp_buftype, rsp);
1809 send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
1810 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
1811 unsigned int num, void **data, unsigned int *size)
1813 struct smb2_set_info_req *req;
1814 struct smb2_set_info_rsp *rsp = NULL;
1819 struct TCP_Server_Info *server;
1820 struct cifs_ses *ses = tcon->ses;
1822 if (ses && (ses->server))
1823 server = ses->server;
1830 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
1834 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
1840 req->hdr.ProcessId = cpu_to_le32(pid);
1842 req->InfoType = SMB2_O_INFO_FILE;
1843 req->FileInfoClass = info_class;
1844 req->PersistentFileId = persistent_fid;
1845 req->VolatileFileId = volatile_fid;
1847 /* 4 for RFC1001 length and 1 for Buffer */
1849 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
1850 req->BufferLength = cpu_to_le32(*size);
1852 inc_rfc1001_len(req, *size - 1 /* Buffer */);
1854 memcpy(req->Buffer, *data, *size);
1856 iov[0].iov_base = (char *)req;
1857 /* 4 for RFC1001 length */
1858 iov[0].iov_len = get_rfc1002_length(req) + 4;
1860 for (i = 1; i < num; i++) {
1861 inc_rfc1001_len(req, size[i]);
1862 le32_add_cpu(&req->BufferLength, size[i]);
1863 iov[i].iov_base = (char *)data[i];
1864 iov[i].iov_len = size[i];
1867 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0);
1868 rsp = (struct smb2_set_info_rsp *)iov[0].iov_base;
1871 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
1875 free_rsp_buf(resp_buftype, rsp);
1881 SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
1882 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
1884 struct smb2_file_rename_info info;
1886 unsigned int size[2];
1888 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
1890 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
1894 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
1895 /* 0 = fail if target already exists */
1896 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
1897 info.FileNameLength = cpu_to_le32(len);
1900 size[0] = sizeof(struct smb2_file_rename_info);
1902 data[1] = target_file;
1903 size[1] = len + 2 /* null */;
1905 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
1906 current->tgid, FILE_RENAME_INFORMATION, 2, data,
1913 SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
1914 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
1916 struct smb2_file_link_info info;
1918 unsigned int size[2];
1920 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
1922 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
1926 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
1927 /* 0 = fail if link already exists */
1928 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
1929 info.FileNameLength = cpu_to_le32(len);
1932 size[0] = sizeof(struct smb2_file_link_info);
1934 data[1] = target_file;
1935 size[1] = len + 2 /* null */;
1937 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
1938 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
1944 SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1945 u64 volatile_fid, u32 pid, __le64 *eof)
1947 struct smb2_file_eof_info info;
1951 info.EndOfFile = *eof;
1954 size = sizeof(struct smb2_file_eof_info);
1956 return send_set_info(xid, tcon, persistent_fid, volatile_fid, pid,
1957 FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
1961 SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
1962 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
1965 size = sizeof(FILE_BASIC_INFO);
1966 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
1967 current->tgid, FILE_BASIC_INFORMATION, 1,
1968 (void **)&buf, &size);
1972 SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
1973 const u64 persistent_fid, const u64 volatile_fid,
1977 struct smb2_oplock_break *req = NULL;
1979 cifs_dbg(FYI, "SMB2_oplock_break\n");
1980 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
1985 req->VolatileFid = volatile_fid;
1986 req->PersistentFid = persistent_fid;
1987 req->OplockLevel = oplock_level;
1988 req->hdr.CreditRequest = cpu_to_le16(1);
1990 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
1991 /* SMB2 buffer freed by function above */
1994 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
1995 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
2002 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
2003 struct kstatfs *kst)
2005 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
2006 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
2007 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
2008 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
2009 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
2014 build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
2015 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
2018 struct smb2_query_info_req *req;
2020 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
2022 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
2025 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2029 req->InfoType = SMB2_O_INFO_FILESYSTEM;
2030 req->FileInfoClass = level;
2031 req->PersistentFileId = persistent_fid;
2032 req->VolatileFileId = volatile_fid;
2033 /* 4 for rfc1002 length field and 1 for pad */
2034 req->InputBufferOffset =
2035 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
2036 req->OutputBufferLength = cpu_to_le32(
2037 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
2039 iov->iov_base = (char *)req;
2040 /* 4 for rfc1002 length field */
2041 iov->iov_len = get_rfc1002_length(req) + 4;
2046 SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
2047 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
2049 struct smb2_query_info_rsp *rsp = NULL;
2053 struct cifs_ses *ses = tcon->ses;
2054 struct smb2_fs_full_size_info *info = NULL;
2056 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
2057 sizeof(struct smb2_fs_full_size_info),
2058 persistent_fid, volatile_fid);
2062 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2064 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2067 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2069 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
2070 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
2071 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2072 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2073 sizeof(struct smb2_fs_full_size_info));
2075 copy_fs_info_to_kstatfs(info, fsdata);
2078 free_rsp_buf(resp_buftype, iov.iov_base);
2083 smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
2084 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2085 const __u32 num_lock, struct smb2_lock_element *buf)
2088 struct smb2_lock_req *req = NULL;
2093 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
2095 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
2099 req->hdr.ProcessId = cpu_to_le32(pid);
2100 req->LockCount = cpu_to_le16(num_lock);
2102 req->PersistentFileId = persist_fid;
2103 req->VolatileFileId = volatile_fid;
2105 count = num_lock * sizeof(struct smb2_lock_element);
2106 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
2108 iov[0].iov_base = (char *)req;
2109 /* 4 for rfc1002 length field and count for all locks */
2110 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
2111 iov[1].iov_base = (char *)buf;
2112 iov[1].iov_len = count;
2114 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
2115 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP);
2117 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
2118 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
2125 SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
2126 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2127 const __u64 length, const __u64 offset, const __u32 lock_flags,
2130 struct smb2_lock_element lock;
2132 lock.Offset = cpu_to_le64(offset);
2133 lock.Length = cpu_to_le64(length);
2134 lock.Flags = cpu_to_le32(lock_flags);
2135 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
2136 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
2138 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
2142 SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
2143 __u8 *lease_key, const __le32 lease_state)
2146 struct smb2_lease_ack *req = NULL;
2148 cifs_dbg(FYI, "SMB2_lease_break\n");
2149 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2154 req->hdr.CreditRequest = cpu_to_le16(1);
2155 req->StructureSize = cpu_to_le16(36);
2156 inc_rfc1001_len(req, 12);
2158 memcpy(req->LeaseKey, lease_key, 16);
2159 req->LeaseState = lease_state;
2161 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2162 /* SMB2 buffer freed by function above */
2165 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2166 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);