4 * Copyright (C) International Business Machines Corp., 2009, 2012
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 hdr->TreeId = tcon->tid;
112 /* Uid is not converted */
114 hdr->SessionId = tcon->ses->Suid;
115 /* BB check following DFS flags BB */
116 /* BB do we have to add check for SHI1005_FLAGS_DFS_ROOT too? */
117 if (tcon->share_flags & SHI1005_FLAGS_DFS)
118 hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS;
119 /* BB how does SMB2 do case sensitive? */
121 hdr->Flags |= SMBFLG_CASELESS; */
122 if (tcon->ses && tcon->ses->server &&
123 (tcon->ses->server->sec_mode & SECMODE_SIGN_REQUIRED))
124 hdr->Flags |= SMB2_FLAGS_SIGNED;
126 pdu->StructureSize2 = cpu_to_le16(parmsize);
131 smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
134 struct nls_table *nls_codepage;
135 struct cifs_ses *ses;
136 struct TCP_Server_Info *server;
139 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
140 * check for tcp and smb session status done differently
141 * for those three - in the calling routine.
146 if (smb2_command == SMB2_TREE_CONNECT)
149 if (tcon->tidStatus == CifsExiting) {
151 * only tree disconnect, open, and write,
152 * (and ulogoff which does not have tcon)
153 * are allowed as we start force umount.
155 if ((smb2_command != SMB2_WRITE) &&
156 (smb2_command != SMB2_CREATE) &&
157 (smb2_command != SMB2_TREE_DISCONNECT)) {
158 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
163 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
164 (!tcon->ses->server))
168 server = ses->server;
171 * Give demultiplex thread up to 10 seconds to reconnect, should be
172 * greater than cifs socket timeout which is 7 seconds
174 while (server->tcpStatus == CifsNeedReconnect) {
176 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
177 * here since they are implicitly done when session drops.
179 switch (smb2_command) {
181 * BB Should we keep oplock break and add flush to exceptions?
183 case SMB2_TREE_DISCONNECT:
186 case SMB2_OPLOCK_BREAK:
190 wait_event_interruptible_timeout(server->response_q,
191 (server->tcpStatus != CifsNeedReconnect), 10 * HZ);
193 /* are we still trying to reconnect? */
194 if (server->tcpStatus != CifsNeedReconnect)
198 * on "soft" mounts we wait once. Hard mounts keep
199 * retrying until process is killed or server comes
203 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
208 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
211 nls_codepage = load_nls_default();
214 * need to prevent multiple threads trying to simultaneously reconnect
215 * the same SMB session
217 mutex_lock(&tcon->ses->session_mutex);
218 rc = cifs_negotiate_protocol(0, tcon->ses);
219 if (!rc && tcon->ses->need_reconnect)
220 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
222 if (rc || !tcon->need_reconnect) {
223 mutex_unlock(&tcon->ses->session_mutex);
227 cifs_mark_open_files_invalid(tcon);
228 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
229 mutex_unlock(&tcon->ses->session_mutex);
230 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
233 atomic_inc(&tconInfoReconnectCount);
235 * BB FIXME add code to check if wsize needs update due to negotiated
236 * smb buffer size shrinking.
240 * Check if handle based operation so we know whether we can continue
241 * or not without returning to caller to reset file handle.
244 * BB Is flush done by server on drop of tcp session? Should we special
245 * case it and skip above?
247 switch (smb2_command) {
253 case SMB2_QUERY_DIRECTORY:
254 case SMB2_CHANGE_NOTIFY:
255 case SMB2_QUERY_INFO:
259 unload_nls(nls_codepage);
264 * Allocate and return pointer to an SMB request hdr, and set basic
265 * SMB information in the SMB header. If the return code is zero, this
266 * function must have filled in request_buf pointer.
269 small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
274 rc = smb2_reconnect(smb2_command, tcon);
278 /* BB eventually switch this to SMB2 specific small buf size */
279 *request_buf = cifs_small_buf_get();
280 if (*request_buf == NULL) {
281 /* BB should we add a retry in here if not a writepage? */
285 smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon);
288 #ifdef CONFIG_CIFS_STATS2
289 uint16_t com_code = le16_to_cpu(smb2_command);
290 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
292 cifs_stats_inc(&tcon->num_smbs_sent);
299 free_rsp_buf(int resp_buftype, void *rsp)
301 if (resp_buftype == CIFS_SMALL_BUFFER)
302 cifs_small_buf_release(rsp);
303 else if (resp_buftype == CIFS_LARGE_BUFFER)
304 cifs_buf_release(rsp);
310 * SMB2 Worker functions follow:
312 * The general structure of the worker functions is:
313 * 1) Call smb2_init (assembles SMB2 header)
314 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
315 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
316 * 4) Decode SMB2 command specific fields in the fixed length area
317 * 5) Decode variable length data area (if any for this SMB2 command type)
318 * 6) Call free smb buffer
324 SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
326 struct smb2_negotiate_req *req;
327 struct smb2_negotiate_rsp *rsp;
331 struct TCP_Server_Info *server;
332 unsigned int sec_flags;
334 int blob_offset, blob_length;
336 int flags = CIFS_NEG_OP;
338 cifs_dbg(FYI, "Negotiate protocol\n");
341 server = ses->server;
347 rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
351 /* if any of auth flags (ie not sign or seal) are overriden use them */
352 if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
353 sec_flags = ses->overrideSecFlg; /* BB FIXME fix sign flags?*/
354 else /* if override flags set only sign/seal OR them with global auth */
355 sec_flags = global_secflags | ses->overrideSecFlg;
357 cifs_dbg(FYI, "sec_flags 0x%x\n", sec_flags);
359 req->hdr.SessionId = 0;
361 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
363 req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */
364 inc_rfc1001_len(req, 2);
366 /* only one of SMB2 signing flags may be set in SMB2 request */
367 if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN)
368 temp = SMB2_NEGOTIATE_SIGNING_REQUIRED;
369 else if (sec_flags & CIFSSEC_MAY_SIGN) /* MAY_SIGN is a single flag */
370 temp = SMB2_NEGOTIATE_SIGNING_ENABLED;
372 req->SecurityMode = cpu_to_le16(temp);
374 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
376 memcpy(req->ClientGUID, cifs_client_guid, SMB2_CLIENT_GUID_SIZE);
378 iov[0].iov_base = (char *)req;
379 /* 4 for rfc1002 length field */
380 iov[0].iov_len = get_rfc1002_length(req) + 4;
382 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags);
384 rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base;
386 * No tcon so can't do
387 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
392 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
394 /* BB we may eventually want to match the negotiated vs. requested
395 dialect, even though we are only requesting one at a time */
396 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
397 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
398 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
399 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
400 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
401 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
403 cifs_dbg(VFS, "Illegal dialect returned by server %d\n",
404 le16_to_cpu(rsp->DialectRevision));
408 server->dialect = le16_to_cpu(rsp->DialectRevision);
410 server->maxBuf = le32_to_cpu(rsp->MaxTransactSize);
411 /* set it to the maximum buffer size value we can send with 1 credit */
412 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
413 SMB2_MAX_BUFFER_SIZE);
414 server->max_read = le32_to_cpu(rsp->MaxReadSize);
415 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
416 /* BB Do we need to validate the SecurityMode? */
417 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
418 server->capabilities = le32_to_cpu(rsp->Capabilities);
420 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
422 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
424 if (blob_length == 0) {
425 cifs_dbg(VFS, "missing security blob on negprot\n");
430 cifs_dbg(FYI, "sec_flags 0x%x\n", sec_flags);
431 if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) {
432 cifs_dbg(FYI, "Signing required\n");
433 if (!(server->sec_mode & (SMB2_NEGOTIATE_SIGNING_REQUIRED |
434 SMB2_NEGOTIATE_SIGNING_ENABLED))) {
435 cifs_dbg(VFS, "signing required but server lacks support\n");
439 server->sec_mode |= SECMODE_SIGN_REQUIRED;
440 } else if (sec_flags & CIFSSEC_MAY_SIGN) {
441 cifs_dbg(FYI, "Signing optional\n");
442 if (server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
443 cifs_dbg(FYI, "Server requires signing\n");
444 server->sec_mode |= SECMODE_SIGN_REQUIRED;
447 ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED);
450 cifs_dbg(FYI, "Signing disabled\n");
451 if (server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
452 cifs_dbg(VFS, "Server requires packet signing to be enabled in /proc/fs/cifs/SecurityFlags\n");
457 ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED);
460 #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
461 rc = decode_neg_token_init(security_blob, blob_length,
472 free_rsp_buf(resp_buftype, rsp);
477 SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
478 const struct nls_table *nls_cp)
480 struct smb2_sess_setup_req *req;
481 struct smb2_sess_setup_rsp *rsp = NULL;
485 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
486 struct TCP_Server_Info *server;
487 unsigned int sec_flags;
491 char *ntlmssp_blob = NULL;
492 bool use_spnego = false; /* else use raw ntlmssp */
494 cifs_dbg(FYI, "Session Setup\n");
497 server = ses->server;
504 * If memory allocation is successful, caller of this function
507 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
511 ses->server->secType = RawNTLMSSP;
513 ssetup_ntlmssp_authenticate:
514 if (phase == NtLmChallenge)
515 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
517 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
521 /* if any of auth flags (ie not sign or seal) are overriden use them */
522 if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
523 sec_flags = ses->overrideSecFlg; /* BB FIXME fix sign flags?*/
524 else /* if override flags set only sign/seal OR them with global auth */
525 sec_flags = global_secflags | ses->overrideSecFlg;
527 cifs_dbg(FYI, "sec_flags 0x%x\n", sec_flags);
529 req->hdr.SessionId = 0; /* First session, not a reauthenticate */
530 req->VcNumber = 0; /* MBZ */
531 /* to enable echos and oplocks */
532 req->hdr.CreditRequest = cpu_to_le16(3);
534 /* only one of SMB2 signing flags may be set in SMB2 request */
535 if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN)
536 temp = SMB2_NEGOTIATE_SIGNING_REQUIRED;
537 else if (ses->server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED)
538 temp = SMB2_NEGOTIATE_SIGNING_REQUIRED;
539 else if (sec_flags & CIFSSEC_MAY_SIGN) /* MAY_SIGN is a single flag */
540 temp = SMB2_NEGOTIATE_SIGNING_ENABLED;
542 req->SecurityMode = temp;
543 req->Capabilities = 0;
544 req->Channel = 0; /* MBZ */
546 iov[0].iov_base = (char *)req;
547 /* 4 for rfc1002 length field and 1 for pad */
548 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
549 if (phase == NtLmNegotiate) {
550 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
552 if (ntlmssp_blob == NULL) {
556 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
558 /* blob_length = build_spnego_ntlmssp_blob(
560 sizeof(struct _NEGOTIATE_MESSAGE),
562 /* BB eventually need to add this */
563 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
568 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
569 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
570 security_blob = ntlmssp_blob;
572 } else if (phase == NtLmAuthenticate) {
573 req->hdr.SessionId = ses->Suid;
574 ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500,
576 if (ntlmssp_blob == NULL) {
580 rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses,
583 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n",
585 goto ssetup_exit; /* BB double check error handling */
588 /* blob_length = build_spnego_ntlmssp_blob(
592 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
597 security_blob = ntlmssp_blob;
600 cifs_dbg(VFS, "illegal ntlmssp phase\n");
605 /* Testing shows that buffer offset must be at location of Buffer[0] */
606 req->SecurityBufferOffset =
607 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
608 1 /* pad */ - 4 /* rfc1001 len */);
609 req->SecurityBufferLength = cpu_to_le16(blob_length);
610 iov[1].iov_base = security_blob;
611 iov[1].iov_len = blob_length;
613 inc_rfc1001_len(req, blob_length - 1 /* pad */);
615 /* BB add code to build os and lm fields */
617 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype,
618 CIFS_LOG_ERROR | CIFS_NEG_OP);
620 kfree(security_blob);
621 rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base;
622 if (resp_buftype != CIFS_NO_BUFFER &&
623 rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) {
624 if (phase != NtLmNegotiate) {
625 cifs_dbg(VFS, "Unexpected more processing error\n");
628 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
629 le16_to_cpu(rsp->SecurityBufferOffset)) {
630 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
631 le16_to_cpu(rsp->SecurityBufferOffset));
636 /* NTLMSSP Negotiate sent now processing challenge (response) */
637 phase = NtLmChallenge; /* process ntlmssp challenge */
638 rc = 0; /* MORE_PROCESSING is not an error here but expected */
639 ses->Suid = rsp->hdr.SessionId;
640 rc = decode_ntlmssp_challenge(rsp->Buffer,
641 le16_to_cpu(rsp->SecurityBufferLength), ses);
645 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
646 * but at least the raw NTLMSSP case works.
649 * No tcon so can't do
650 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
655 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
657 free_rsp_buf(resp_buftype, rsp);
659 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
660 if ((phase == NtLmChallenge) && (rc == 0))
661 goto ssetup_ntlmssp_authenticate;
666 SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
668 struct smb2_logoff_req *req; /* response is also trivial struct */
670 struct TCP_Server_Info *server;
672 cifs_dbg(FYI, "disconnect session %p\n", ses);
674 if (ses && (ses->server))
675 server = ses->server;
679 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
683 /* since no tcon, smb2_init can not do this, so do here */
684 req->hdr.SessionId = ses->Suid;
685 if (server->sec_mode & SECMODE_SIGN_REQUIRED)
686 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
688 rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0);
690 * No tcon so can't do
691 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
696 static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
698 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
701 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
704 SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
705 struct cifs_tcon *tcon, const struct nls_table *cp)
707 struct smb2_tree_connect_req *req;
708 struct smb2_tree_connect_rsp *rsp = NULL;
713 struct TCP_Server_Info *server;
714 __le16 *unc_path = NULL;
716 cifs_dbg(FYI, "TCON\n");
718 if ((ses->server) && tree)
719 server = ses->server;
723 if (tcon && tcon->bad_network_name)
726 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
727 if (unc_path == NULL)
730 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
732 if (unc_path_len < 2) {
737 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
744 /* since no tcon, smb2_init can not do this, so do here */
745 req->hdr.SessionId = ses->Suid;
746 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
747 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
750 iov[0].iov_base = (char *)req;
751 /* 4 for rfc1002 length field and 1 for pad */
752 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
754 /* Testing shows that buffer offset must be at location of Buffer[0] */
755 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
756 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
757 req->PathLength = cpu_to_le16(unc_path_len - 2);
758 iov[1].iov_base = unc_path;
759 iov[1].iov_len = unc_path_len;
761 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
763 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
764 rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base;
768 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
769 tcon->need_reconnect = true;
771 goto tcon_error_exit;
775 ses->ipc_tid = rsp->hdr.TreeId;
779 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
780 cifs_dbg(FYI, "connection to disk share\n");
781 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
783 cifs_dbg(FYI, "connection to pipe share\n");
784 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
786 cifs_dbg(FYI, "connection to printer\n");
788 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
790 goto tcon_error_exit;
793 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
794 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
795 tcon->tidStatus = CifsGood;
796 tcon->need_reconnect = false;
797 tcon->tid = rsp->hdr.TreeId;
798 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
800 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
801 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
802 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
805 free_rsp_buf(resp_buftype, rsp);
810 if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) {
811 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
813 tcon->bad_network_name = true;
819 SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
821 struct smb2_tree_disconnect_req *req; /* response is trivial */
823 struct TCP_Server_Info *server;
824 struct cifs_ses *ses = tcon->ses;
826 cifs_dbg(FYI, "Tree Disconnect\n");
828 if (ses && (ses->server))
829 server = ses->server;
833 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
836 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
840 rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0);
842 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
847 static struct create_lease *
848 create_lease_buf(u8 *lease_key, u8 oplock)
850 struct create_lease *buf;
852 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
856 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
857 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
858 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
859 buf->lcontext.LeaseState = SMB2_LEASE_WRITE_CACHING |
860 SMB2_LEASE_READ_CACHING;
861 else if (oplock == SMB2_OPLOCK_LEVEL_II)
862 buf->lcontext.LeaseState = SMB2_LEASE_READ_CACHING;
863 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
864 buf->lcontext.LeaseState = SMB2_LEASE_HANDLE_CACHING |
865 SMB2_LEASE_READ_CACHING |
866 SMB2_LEASE_WRITE_CACHING;
868 buf->ccontext.DataOffset = cpu_to_le16(offsetof
869 (struct create_lease, lcontext));
870 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
871 buf->ccontext.NameOffset = cpu_to_le16(offsetof
872 (struct create_lease, Name));
873 buf->ccontext.NameLength = cpu_to_le16(4);
882 parse_lease_state(struct smb2_create_rsp *rsp)
885 struct create_lease *lc;
888 data_offset = (char *)rsp;
889 data_offset += 4 + le32_to_cpu(rsp->CreateContextsOffset);
890 lc = (struct create_lease *)data_offset;
892 char *name = le16_to_cpu(lc->ccontext.NameOffset) + (char *)lc;
893 if (le16_to_cpu(lc->ccontext.NameLength) != 4 ||
894 strncmp(name, "RqLs", 4)) {
895 lc = (struct create_lease *)((char *)lc
896 + le32_to_cpu(lc->ccontext.Next));
899 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
900 return SMB2_OPLOCK_LEVEL_NOCHANGE;
903 } while (le32_to_cpu(lc->ccontext.Next) != 0);
908 return smb2_map_lease_to_oplock(lc->lcontext.LeaseState);
912 SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path,
913 u64 *persistent_fid, u64 *volatile_fid, __u32 desired_access,
914 __u32 create_disposition, __u32 file_attributes, __u32 create_options,
915 __u8 *oplock, struct smb2_file_all_info *buf)
917 struct smb2_create_req *req;
918 struct smb2_create_rsp *rsp;
919 struct TCP_Server_Info *server;
920 struct cifs_ses *ses = tcon->ses;
924 __le16 *copy_path = NULL;
929 cifs_dbg(FYI, "create/open\n");
931 if (ses && (ses->server))
932 server = ses->server;
936 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
940 req->ImpersonationLevel = IL_IMPERSONATION;
941 req->DesiredAccess = cpu_to_le32(desired_access);
942 /* File attributes ignored on open (used in create though) */
943 req->FileAttributes = cpu_to_le32(file_attributes);
944 req->ShareAccess = FILE_SHARE_ALL_LE;
945 req->CreateDisposition = cpu_to_le32(create_disposition);
946 req->CreateOptions = cpu_to_le32(create_options);
947 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
948 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)
949 - 8 /* pad */ - 4 /* do not count rfc1001 len field */);
951 iov[0].iov_base = (char *)req;
952 /* 4 for rfc1002 length field */
953 iov[0].iov_len = get_rfc1002_length(req) + 4;
955 /* MUST set path len (NameLength) to 0 opening root of share */
956 if (uni_path_len >= 4) {
957 req->NameLength = cpu_to_le16(uni_path_len - 2);
958 /* -1 since last byte is buf[0] which is sent below (path) */
960 if (uni_path_len % 8 != 0) {
961 copy_size = uni_path_len / 8 * 8;
962 if (copy_size < uni_path_len)
965 copy_path = kzalloc(copy_size, GFP_KERNEL);
968 memcpy((char *)copy_path, (const char *)path,
970 uni_path_len = copy_size;
974 iov[1].iov_len = uni_path_len;
975 iov[1].iov_base = path;
977 * -1 since last byte is buf[0] which was counted in
980 inc_rfc1001_len(req, uni_path_len - 1);
983 req->hdr.smb2_buf_length = cpu_to_be32(be32_to_cpu(
984 req->hdr.smb2_buf_length) + 8 - 1);
989 if (!server->oplocks)
990 *oplock = SMB2_OPLOCK_LEVEL_NONE;
992 if (!(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
993 *oplock == SMB2_OPLOCK_LEVEL_NONE)
994 req->RequestedOplockLevel = *oplock;
996 iov[num_iovecs].iov_base = create_lease_buf(oplock+1, *oplock);
997 if (iov[num_iovecs].iov_base == NULL) {
998 cifs_small_buf_release(req);
1002 iov[num_iovecs].iov_len = sizeof(struct create_lease);
1003 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1004 req->CreateContextsOffset = cpu_to_le32(
1005 sizeof(struct smb2_create_req) - 4 - 8 +
1006 iov[num_iovecs-1].iov_len);
1007 req->CreateContextsLength = cpu_to_le32(
1008 sizeof(struct create_lease));
1009 inc_rfc1001_len(&req->hdr, sizeof(struct create_lease));
1013 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1014 rsp = (struct smb2_create_rsp *)iov[0].iov_base;
1017 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
1021 *persistent_fid = rsp->PersistentFileId;
1022 *volatile_fid = rsp->VolatileFileId;
1025 memcpy(buf, &rsp->CreationTime, 32);
1026 buf->AllocationSize = rsp->AllocationSize;
1027 buf->EndOfFile = rsp->EndofFile;
1028 buf->Attributes = rsp->FileAttributes;
1029 buf->NumberOfLinks = cpu_to_le32(1);
1030 buf->DeletePending = 0;
1033 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
1034 *oplock = parse_lease_state(rsp);
1036 *oplock = rsp->OplockLevel;
1039 free_rsp_buf(resp_buftype, rsp);
1044 SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1045 u64 persistent_fid, u64 volatile_fid)
1047 struct smb2_close_req *req;
1048 struct smb2_close_rsp *rsp;
1049 struct TCP_Server_Info *server;
1050 struct cifs_ses *ses = tcon->ses;
1055 cifs_dbg(FYI, "Close\n");
1057 if (ses && (ses->server))
1058 server = ses->server;
1062 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1066 req->PersistentFileId = persistent_fid;
1067 req->VolatileFileId = volatile_fid;
1069 iov[0].iov_base = (char *)req;
1070 /* 4 for rfc1002 length field */
1071 iov[0].iov_len = get_rfc1002_length(req) + 4;
1073 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1074 rsp = (struct smb2_close_rsp *)iov[0].iov_base;
1078 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
1082 /* BB FIXME - decode close response, update inode for caching */
1085 free_rsp_buf(resp_buftype, rsp);
1090 validate_buf(unsigned int offset, unsigned int buffer_length,
1091 struct smb2_hdr *hdr, unsigned int min_buf_size)
1094 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
1095 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
1096 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1097 char *end_of_buf = begin_of_buf + buffer_length;
1100 if (buffer_length < min_buf_size) {
1101 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
1102 buffer_length, min_buf_size);
1106 /* check if beyond RFC1001 maximum length */
1107 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
1108 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
1109 buffer_length, smb_len);
1113 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
1114 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
1122 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1123 * Caller must free buffer.
1126 validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
1127 struct smb2_hdr *hdr, unsigned int minbufsize,
1131 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1137 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
1141 memcpy(data, begin_of_buf, buffer_length);
1147 query_info(const unsigned int xid, struct cifs_tcon *tcon,
1148 u64 persistent_fid, u64 volatile_fid, u8 info_class,
1149 size_t output_len, size_t min_len, void *data)
1151 struct smb2_query_info_req *req;
1152 struct smb2_query_info_rsp *rsp = NULL;
1156 struct TCP_Server_Info *server;
1157 struct cifs_ses *ses = tcon->ses;
1159 cifs_dbg(FYI, "Query Info\n");
1161 if (ses && (ses->server))
1162 server = ses->server;
1166 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
1170 req->InfoType = SMB2_O_INFO_FILE;
1171 req->FileInfoClass = info_class;
1172 req->PersistentFileId = persistent_fid;
1173 req->VolatileFileId = volatile_fid;
1174 /* 4 for rfc1002 length field and 1 for Buffer */
1175 req->InputBufferOffset =
1176 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
1177 req->OutputBufferLength = cpu_to_le32(output_len);
1179 iov[0].iov_base = (char *)req;
1180 /* 4 for rfc1002 length field */
1181 iov[0].iov_len = get_rfc1002_length(req) + 4;
1183 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1184 rsp = (struct smb2_query_info_rsp *)iov[0].iov_base;
1187 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
1191 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
1192 le32_to_cpu(rsp->OutputBufferLength),
1193 &rsp->hdr, min_len, data);
1196 free_rsp_buf(resp_buftype, rsp);
1201 SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
1202 u64 persistent_fid, u64 volatile_fid,
1203 struct smb2_file_all_info *data)
1205 return query_info(xid, tcon, persistent_fid, volatile_fid,
1206 FILE_ALL_INFORMATION,
1207 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
1208 sizeof(struct smb2_file_all_info), data);
1212 SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
1213 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
1215 return query_info(xid, tcon, persistent_fid, volatile_fid,
1216 FILE_INTERNAL_INFORMATION,
1217 sizeof(struct smb2_file_internal_info),
1218 sizeof(struct smb2_file_internal_info), uniqueid);
1222 * This is a no-op for now. We're not really interested in the reply, but
1223 * rather in the fact that the server sent one and that server->lstrp
1226 * FIXME: maybe we should consider checking that the reply matches request?
1229 smb2_echo_callback(struct mid_q_entry *mid)
1231 struct TCP_Server_Info *server = mid->callback_data;
1232 struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf;
1233 unsigned int credits_received = 1;
1235 if (mid->mid_state == MID_RESPONSE_RECEIVED)
1236 credits_received = le16_to_cpu(smb2->hdr.CreditRequest);
1238 DeleteMidQEntry(mid);
1239 add_credits(server, credits_received, CIFS_ECHO_OP);
1243 SMB2_echo(struct TCP_Server_Info *server)
1245 struct smb2_echo_req *req;
1248 struct smb_rqst rqst = { .rq_iov = &iov,
1251 cifs_dbg(FYI, "In echo request\n");
1253 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
1257 req->hdr.CreditRequest = cpu_to_le16(1);
1259 iov.iov_base = (char *)req;
1260 /* 4 for rfc1002 length field */
1261 iov.iov_len = get_rfc1002_length(req) + 4;
1263 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server,
1266 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
1268 cifs_small_buf_release(req);
1273 SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1276 struct smb2_flush_req *req;
1277 struct TCP_Server_Info *server;
1278 struct cifs_ses *ses = tcon->ses;
1283 cifs_dbg(FYI, "Flush\n");
1285 if (ses && (ses->server))
1286 server = ses->server;
1290 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
1294 req->PersistentFileId = persistent_fid;
1295 req->VolatileFileId = volatile_fid;
1297 iov[0].iov_base = (char *)req;
1298 /* 4 for rfc1002 length field */
1299 iov[0].iov_len = get_rfc1002_length(req) + 4;
1301 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1303 if ((rc != 0) && tcon)
1304 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
1306 free_rsp_buf(resp_buftype, iov[0].iov_base);
1311 * To form a chain of read requests, any read requests after the first should
1312 * have the end_of_chain boolean set to true.
1315 smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms,
1316 unsigned int remaining_bytes, int request_type)
1319 struct smb2_read_req *req = NULL;
1321 rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req);
1324 if (io_parms->tcon->ses->server == NULL)
1325 return -ECONNABORTED;
1327 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1329 req->PersistentFileId = io_parms->persistent_fid;
1330 req->VolatileFileId = io_parms->volatile_fid;
1331 req->ReadChannelInfoOffset = 0; /* reserved */
1332 req->ReadChannelInfoLength = 0; /* reserved */
1333 req->Channel = 0; /* reserved */
1334 req->MinimumCount = 0;
1335 req->Length = cpu_to_le32(io_parms->length);
1336 req->Offset = cpu_to_le64(io_parms->offset);
1338 if (request_type & CHAINED_REQUEST) {
1339 if (!(request_type & END_OF_CHAIN)) {
1340 /* 4 for rfc1002 length field */
1341 req->hdr.NextCommand =
1342 cpu_to_le32(get_rfc1002_length(req) + 4);
1343 } else /* END_OF_CHAIN */
1344 req->hdr.NextCommand = 0;
1345 if (request_type & RELATED_REQUEST) {
1346 req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
1348 * Related requests use info from previous read request
1351 req->hdr.SessionId = 0xFFFFFFFF;
1352 req->hdr.TreeId = 0xFFFFFFFF;
1353 req->PersistentFileId = 0xFFFFFFFF;
1354 req->VolatileFileId = 0xFFFFFFFF;
1357 if (remaining_bytes > io_parms->length)
1358 req->RemainingBytes = cpu_to_le32(remaining_bytes);
1360 req->RemainingBytes = 0;
1362 iov[0].iov_base = (char *)req;
1363 /* 4 for rfc1002 length field */
1364 iov[0].iov_len = get_rfc1002_length(req) + 4;
1369 smb2_readv_callback(struct mid_q_entry *mid)
1371 struct cifs_readdata *rdata = mid->callback_data;
1372 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
1373 struct TCP_Server_Info *server = tcon->ses->server;
1374 struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base;
1375 unsigned int credits_received = 1;
1376 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
1378 .rq_pages = rdata->pages,
1379 .rq_npages = rdata->nr_pages,
1380 .rq_pagesz = rdata->pagesz,
1381 .rq_tailsz = rdata->tailsz };
1383 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1384 __func__, mid->mid, mid->mid_state, rdata->result,
1387 switch (mid->mid_state) {
1388 case MID_RESPONSE_RECEIVED:
1389 credits_received = le16_to_cpu(buf->CreditRequest);
1390 /* result already set, check signature */
1391 if (server->sec_mode &
1392 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) {
1395 rc = smb2_verify_signature(&rqst, server);
1397 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
1400 /* FIXME: should this be counted toward the initiating task? */
1401 task_io_account_read(rdata->bytes);
1402 cifs_stats_bytes_read(tcon, rdata->bytes);
1404 case MID_REQUEST_SUBMITTED:
1405 case MID_RETRY_NEEDED:
1406 rdata->result = -EAGAIN;
1409 if (rdata->result != -ENODATA)
1410 rdata->result = -EIO;
1414 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
1416 queue_work(cifsiod_wq, &rdata->work);
1417 DeleteMidQEntry(mid);
1418 add_credits(server, credits_received, 0);
1421 /* smb2_async_readv - send an async write, and set up mid to handle result */
1423 smb2_async_readv(struct cifs_readdata *rdata)
1426 struct smb2_hdr *buf;
1427 struct cifs_io_parms io_parms;
1428 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
1431 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
1432 __func__, rdata->offset, rdata->bytes);
1434 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
1435 io_parms.offset = rdata->offset;
1436 io_parms.length = rdata->bytes;
1437 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
1438 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
1439 io_parms.pid = rdata->pid;
1440 rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0);
1444 buf = (struct smb2_hdr *)rdata->iov.iov_base;
1445 /* 4 for rfc1002 length field */
1446 rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4;
1448 kref_get(&rdata->refcount);
1449 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
1450 cifs_readv_receive, smb2_readv_callback,
1453 kref_put(&rdata->refcount, cifs_readdata_release);
1454 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
1457 cifs_small_buf_release(buf);
1462 SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
1463 unsigned int *nbytes, char **buf, int *buf_type)
1465 int resp_buftype, rc = -EACCES;
1466 struct smb2_read_rsp *rsp = NULL;
1470 rc = smb2_new_read_req(iov, io_parms, 0, 0);
1474 rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1,
1475 &resp_buftype, CIFS_LOG_ERROR);
1477 rsp = (struct smb2_read_rsp *)iov[0].iov_base;
1479 if (rsp->hdr.Status == STATUS_END_OF_FILE) {
1480 free_rsp_buf(resp_buftype, iov[0].iov_base);
1485 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
1486 cifs_dbg(VFS, "Send error in read = %d\n", rc);
1488 *nbytes = le32_to_cpu(rsp->DataLength);
1489 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
1490 (*nbytes > io_parms->length)) {
1491 cifs_dbg(FYI, "bad length %d for count %d\n",
1492 *nbytes, io_parms->length);
1499 memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset,
1501 free_rsp_buf(resp_buftype, iov[0].iov_base);
1502 } else if (resp_buftype != CIFS_NO_BUFFER) {
1503 *buf = iov[0].iov_base;
1504 if (resp_buftype == CIFS_SMALL_BUFFER)
1505 *buf_type = CIFS_SMALL_BUFFER;
1506 else if (resp_buftype == CIFS_LARGE_BUFFER)
1507 *buf_type = CIFS_LARGE_BUFFER;
1513 * Check the mid_state and signature on received buffer (if any), and queue the
1514 * workqueue completion task.
1517 smb2_writev_callback(struct mid_q_entry *mid)
1519 struct cifs_writedata *wdata = mid->callback_data;
1520 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1521 unsigned int written;
1522 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
1523 unsigned int credits_received = 1;
1525 switch (mid->mid_state) {
1526 case MID_RESPONSE_RECEIVED:
1527 credits_received = le16_to_cpu(rsp->hdr.CreditRequest);
1528 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
1529 if (wdata->result != 0)
1532 written = le32_to_cpu(rsp->DataLength);
1534 * Mask off high 16 bits when bytes written as returned
1535 * by the server is greater than bytes requested by the
1536 * client. OS/2 servers are known to set incorrect
1539 if (written > wdata->bytes)
1542 if (written < wdata->bytes)
1543 wdata->result = -ENOSPC;
1545 wdata->bytes = written;
1547 case MID_REQUEST_SUBMITTED:
1548 case MID_RETRY_NEEDED:
1549 wdata->result = -EAGAIN;
1552 wdata->result = -EIO;
1557 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1559 queue_work(cifsiod_wq, &wdata->work);
1560 DeleteMidQEntry(mid);
1561 add_credits(tcon->ses->server, credits_received, 0);
1564 /* smb2_async_writev - send an async write, and set up mid to handle result */
1566 smb2_async_writev(struct cifs_writedata *wdata)
1569 struct smb2_write_req *req = NULL;
1570 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1572 struct smb_rqst rqst;
1574 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
1576 goto async_writev_out;
1578 req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid);
1580 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
1581 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
1582 req->WriteChannelInfoOffset = 0;
1583 req->WriteChannelInfoLength = 0;
1585 req->Offset = cpu_to_le64(wdata->offset);
1586 /* 4 for rfc1002 length field */
1587 req->DataOffset = cpu_to_le16(
1588 offsetof(struct smb2_write_req, Buffer) - 4);
1589 req->RemainingBytes = 0;
1591 /* 4 for rfc1002 length field and 1 for Buffer */
1592 iov.iov_len = get_rfc1002_length(req) + 4 - 1;
1597 rqst.rq_pages = wdata->pages;
1598 rqst.rq_npages = wdata->nr_pages;
1599 rqst.rq_pagesz = wdata->pagesz;
1600 rqst.rq_tailsz = wdata->tailsz;
1602 cifs_dbg(FYI, "async write at %llu %u bytes\n",
1603 wdata->offset, wdata->bytes);
1605 req->Length = cpu_to_le32(wdata->bytes);
1607 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
1609 kref_get(&wdata->refcount);
1610 rc = cifs_call_async(tcon->ses->server, &rqst, NULL,
1611 smb2_writev_callback, wdata, 0);
1614 kref_put(&wdata->refcount, cifs_writedata_release);
1615 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1619 cifs_small_buf_release(req);
1624 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1625 * The length field from io_parms must be at least 1 and indicates a number of
1626 * elements with data to write that begins with position 1 in iov array. All
1627 * data length is specified by count.
1630 SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
1631 unsigned int *nbytes, struct kvec *iov, int n_vec)
1634 struct smb2_write_req *req = NULL;
1635 struct smb2_write_rsp *rsp = NULL;
1642 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
1646 if (io_parms->tcon->ses->server == NULL)
1647 return -ECONNABORTED;
1649 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1651 req->PersistentFileId = io_parms->persistent_fid;
1652 req->VolatileFileId = io_parms->volatile_fid;
1653 req->WriteChannelInfoOffset = 0;
1654 req->WriteChannelInfoLength = 0;
1656 req->Length = cpu_to_le32(io_parms->length);
1657 req->Offset = cpu_to_le64(io_parms->offset);
1658 /* 4 for rfc1002 length field */
1659 req->DataOffset = cpu_to_le16(
1660 offsetof(struct smb2_write_req, Buffer) - 4);
1661 req->RemainingBytes = 0;
1663 iov[0].iov_base = (char *)req;
1664 /* 4 for rfc1002 length field and 1 for Buffer */
1665 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1667 /* length of entire message including data to be written */
1668 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
1670 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
1672 rsp = (struct smb2_write_rsp *)iov[0].iov_base;
1675 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
1676 cifs_dbg(VFS, "Send error in write = %d\n", rc);
1678 *nbytes = le32_to_cpu(rsp->DataLength);
1680 free_rsp_buf(resp_buftype, rsp);
1685 num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
1688 unsigned int entrycount = 0;
1689 unsigned int next_offset = 0;
1690 FILE_DIRECTORY_INFO *entryptr;
1692 if (bufstart == NULL)
1695 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
1698 entryptr = (FILE_DIRECTORY_INFO *)
1699 ((char *)entryptr + next_offset);
1701 if ((char *)entryptr + size > end_of_buf) {
1702 cifs_dbg(VFS, "malformed search entry would overflow\n");
1706 len = le32_to_cpu(entryptr->FileNameLength);
1707 if ((char *)entryptr + len + size > end_of_buf) {
1708 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
1713 *lastentry = (char *)entryptr;
1716 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
1728 SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
1729 u64 persistent_fid, u64 volatile_fid, int index,
1730 struct cifs_search_info *srch_inf)
1732 struct smb2_query_directory_req *req;
1733 struct smb2_query_directory_rsp *rsp = NULL;
1738 unsigned char *bufptr;
1739 struct TCP_Server_Info *server;
1740 struct cifs_ses *ses = tcon->ses;
1741 __le16 asteriks = cpu_to_le16('*');
1743 unsigned int output_size = CIFSMaxBufSize;
1744 size_t info_buf_size;
1746 if (ses && (ses->server))
1747 server = ses->server;
1751 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
1755 switch (srch_inf->info_level) {
1756 case SMB_FIND_FILE_DIRECTORY_INFO:
1757 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
1758 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
1760 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
1761 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
1762 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
1765 cifs_dbg(VFS, "info level %u isn't supported\n",
1766 srch_inf->info_level);
1771 req->FileIndex = cpu_to_le32(index);
1772 req->PersistentFileId = persistent_fid;
1773 req->VolatileFileId = volatile_fid;
1776 bufptr = req->Buffer;
1777 memcpy(bufptr, &asteriks, len);
1779 req->FileNameOffset =
1780 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
1781 req->FileNameLength = cpu_to_le16(len);
1783 * BB could be 30 bytes or so longer if we used SMB2 specific
1784 * buffer lengths, but this is safe and close enough.
1786 output_size = min_t(unsigned int, output_size, server->maxBuf);
1787 output_size = min_t(unsigned int, output_size, 2 << 15);
1788 req->OutputBufferLength = cpu_to_le32(output_size);
1790 iov[0].iov_base = (char *)req;
1791 /* 4 for RFC1001 length and 1 for Buffer */
1792 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1794 iov[1].iov_base = (char *)(req->Buffer);
1795 iov[1].iov_len = len;
1797 inc_rfc1001_len(req, len - 1 /* Buffer */);
1799 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
1800 rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base;
1803 if (rc == -ENODATA && rsp->hdr.Status == STATUS_NO_MORE_FILES) {
1804 srch_inf->endOfSearch = true;
1807 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
1811 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
1812 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
1817 srch_inf->unicode = true;
1819 if (srch_inf->ntwrk_buf_start) {
1820 if (srch_inf->smallBuf)
1821 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
1823 cifs_buf_release(srch_inf->ntwrk_buf_start);
1825 srch_inf->ntwrk_buf_start = (char *)rsp;
1826 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
1827 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
1828 /* 4 for rfc1002 length field */
1829 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
1830 srch_inf->entries_in_buffer =
1831 num_entries(srch_inf->srch_entries_start, end_of_smb,
1832 &srch_inf->last_entry, info_buf_size);
1833 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
1834 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
1835 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
1836 srch_inf->srch_entries_start, srch_inf->last_entry);
1837 if (resp_buftype == CIFS_LARGE_BUFFER)
1838 srch_inf->smallBuf = false;
1839 else if (resp_buftype == CIFS_SMALL_BUFFER)
1840 srch_inf->smallBuf = true;
1842 cifs_dbg(VFS, "illegal search buffer type\n");
1847 free_rsp_buf(resp_buftype, rsp);
1852 send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
1853 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
1854 unsigned int num, void **data, unsigned int *size)
1856 struct smb2_set_info_req *req;
1857 struct smb2_set_info_rsp *rsp = NULL;
1862 struct TCP_Server_Info *server;
1863 struct cifs_ses *ses = tcon->ses;
1865 if (ses && (ses->server))
1866 server = ses->server;
1873 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
1877 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
1883 req->hdr.ProcessId = cpu_to_le32(pid);
1885 req->InfoType = SMB2_O_INFO_FILE;
1886 req->FileInfoClass = info_class;
1887 req->PersistentFileId = persistent_fid;
1888 req->VolatileFileId = volatile_fid;
1890 /* 4 for RFC1001 length and 1 for Buffer */
1892 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
1893 req->BufferLength = cpu_to_le32(*size);
1895 inc_rfc1001_len(req, *size - 1 /* Buffer */);
1897 memcpy(req->Buffer, *data, *size);
1899 iov[0].iov_base = (char *)req;
1900 /* 4 for RFC1001 length */
1901 iov[0].iov_len = get_rfc1002_length(req) + 4;
1903 for (i = 1; i < num; i++) {
1904 inc_rfc1001_len(req, size[i]);
1905 le32_add_cpu(&req->BufferLength, size[i]);
1906 iov[i].iov_base = (char *)data[i];
1907 iov[i].iov_len = size[i];
1910 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0);
1911 rsp = (struct smb2_set_info_rsp *)iov[0].iov_base;
1914 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
1918 free_rsp_buf(resp_buftype, rsp);
1924 SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
1925 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
1927 struct smb2_file_rename_info info;
1929 unsigned int size[2];
1931 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
1933 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
1937 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
1938 /* 0 = fail if target already exists */
1939 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
1940 info.FileNameLength = cpu_to_le32(len);
1943 size[0] = sizeof(struct smb2_file_rename_info);
1945 data[1] = target_file;
1946 size[1] = len + 2 /* null */;
1948 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
1949 current->tgid, FILE_RENAME_INFORMATION, 2, data,
1956 SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
1957 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
1959 struct smb2_file_link_info info;
1961 unsigned int size[2];
1963 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
1965 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
1969 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
1970 /* 0 = fail if link already exists */
1971 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
1972 info.FileNameLength = cpu_to_le32(len);
1975 size[0] = sizeof(struct smb2_file_link_info);
1977 data[1] = target_file;
1978 size[1] = len + 2 /* null */;
1980 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
1981 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
1987 SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1988 u64 volatile_fid, u32 pid, __le64 *eof)
1990 struct smb2_file_eof_info info;
1994 info.EndOfFile = *eof;
1997 size = sizeof(struct smb2_file_eof_info);
1999 return send_set_info(xid, tcon, persistent_fid, volatile_fid, pid,
2000 FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
2004 SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2005 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
2008 size = sizeof(FILE_BASIC_INFO);
2009 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2010 current->tgid, FILE_BASIC_INFORMATION, 1,
2011 (void **)&buf, &size);
2015 SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
2016 const u64 persistent_fid, const u64 volatile_fid,
2020 struct smb2_oplock_break *req = NULL;
2022 cifs_dbg(FYI, "SMB2_oplock_break\n");
2023 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2028 req->VolatileFid = volatile_fid;
2029 req->PersistentFid = persistent_fid;
2030 req->OplockLevel = oplock_level;
2031 req->hdr.CreditRequest = cpu_to_le16(1);
2033 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2034 /* SMB2 buffer freed by function above */
2037 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2038 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
2045 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
2046 struct kstatfs *kst)
2048 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
2049 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
2050 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
2051 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
2052 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
2057 build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
2058 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
2061 struct smb2_query_info_req *req;
2063 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
2065 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
2068 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2072 req->InfoType = SMB2_O_INFO_FILESYSTEM;
2073 req->FileInfoClass = level;
2074 req->PersistentFileId = persistent_fid;
2075 req->VolatileFileId = volatile_fid;
2076 /* 4 for rfc1002 length field and 1 for pad */
2077 req->InputBufferOffset =
2078 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
2079 req->OutputBufferLength = cpu_to_le32(
2080 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
2082 iov->iov_base = (char *)req;
2083 /* 4 for rfc1002 length field */
2084 iov->iov_len = get_rfc1002_length(req) + 4;
2089 SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
2090 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
2092 struct smb2_query_info_rsp *rsp = NULL;
2096 struct cifs_ses *ses = tcon->ses;
2097 struct smb2_fs_full_size_info *info = NULL;
2099 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
2100 sizeof(struct smb2_fs_full_size_info),
2101 persistent_fid, volatile_fid);
2105 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2107 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2110 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2112 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
2113 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
2114 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2115 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2116 sizeof(struct smb2_fs_full_size_info));
2118 copy_fs_info_to_kstatfs(info, fsdata);
2121 free_rsp_buf(resp_buftype, iov.iov_base);
2126 smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
2127 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2128 const __u32 num_lock, struct smb2_lock_element *buf)
2131 struct smb2_lock_req *req = NULL;
2136 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
2138 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
2142 req->hdr.ProcessId = cpu_to_le32(pid);
2143 req->LockCount = cpu_to_le16(num_lock);
2145 req->PersistentFileId = persist_fid;
2146 req->VolatileFileId = volatile_fid;
2148 count = num_lock * sizeof(struct smb2_lock_element);
2149 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
2151 iov[0].iov_base = (char *)req;
2152 /* 4 for rfc1002 length field and count for all locks */
2153 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
2154 iov[1].iov_base = (char *)buf;
2155 iov[1].iov_len = count;
2157 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
2158 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP);
2160 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
2161 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
2168 SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
2169 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2170 const __u64 length, const __u64 offset, const __u32 lock_flags,
2173 struct smb2_lock_element lock;
2175 lock.Offset = cpu_to_le64(offset);
2176 lock.Length = cpu_to_le64(length);
2177 lock.Flags = cpu_to_le32(lock_flags);
2178 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
2179 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
2181 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
2185 SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
2186 __u8 *lease_key, const __le32 lease_state)
2189 struct smb2_lease_ack *req = NULL;
2191 cifs_dbg(FYI, "SMB2_lease_break\n");
2192 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2197 req->hdr.CreditRequest = cpu_to_le16(1);
2198 req->StructureSize = cpu_to_le16(36);
2199 inc_rfc1001_len(req, 12);
2201 memcpy(req->LeaseKey, lease_key, 16);
2202 req->LeaseState = lease_state;
2204 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2205 /* SMB2 buffer freed by function above */
2208 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
2209 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);