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/uuid.h>
37 #include <linux/pagemap.h>
38 #include <linux/xattr.h>
42 #include "cifsproto.h"
43 #include "smb2proto.h"
44 #include "cifs_unicode.h"
45 #include "cifs_debug.h"
47 #include "smb2status.h"
50 #include "cifs_spnego.h"
51 #include "smbdirect.h"
55 * The following table defines the expected "StructureSize" of SMB2 requests
56 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
58 * Note that commands are defined in smb2pdu.h in le16 but the array below is
59 * indexed by command in host byte order.
61 static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
62 /* SMB2_NEGOTIATE */ 36,
63 /* SMB2_SESSION_SETUP */ 25,
65 /* SMB2_TREE_CONNECT */ 9,
66 /* SMB2_TREE_DISCONNECT */ 4,
76 /* SMB2_QUERY_DIRECTORY */ 33,
77 /* SMB2_CHANGE_NOTIFY */ 32,
78 /* SMB2_QUERY_INFO */ 41,
79 /* SMB2_SET_INFO */ 33,
80 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
83 static int smb3_encryption_required(const struct cifs_tcon *tcon)
87 if ((tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
88 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
91 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
97 smb2_hdr_assemble(struct smb2_sync_hdr *shdr, __le16 smb2_cmd,
98 const struct cifs_tcon *tcon)
100 shdr->ProtocolId = SMB2_PROTO_NUMBER;
101 shdr->StructureSize = cpu_to_le16(64);
102 shdr->Command = smb2_cmd;
103 if (tcon && tcon->ses && tcon->ses->server) {
104 struct TCP_Server_Info *server = tcon->ses->server;
106 spin_lock(&server->req_lock);
107 /* Request up to 2 credits but don't go over the limit. */
108 if (server->credits >= server->max_credits)
109 shdr->CreditRequest = cpu_to_le16(0);
111 shdr->CreditRequest = cpu_to_le16(
112 min_t(int, server->max_credits -
113 server->credits, 2));
114 spin_unlock(&server->req_lock);
116 shdr->CreditRequest = cpu_to_le16(2);
118 shdr->ProcessId = cpu_to_le32((__u16)current->tgid);
123 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
124 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
125 if ((tcon->ses) && (tcon->ses->server) &&
126 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
127 shdr->CreditCharge = cpu_to_le16(1);
128 /* else CreditCharge MBZ */
130 shdr->TreeId = tcon->tid;
131 /* Uid is not converted */
133 shdr->SessionId = tcon->ses->Suid;
136 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
137 * to pass the path on the Open SMB prefixed by \\server\share.
138 * Not sure when we would need to do the augmented path (if ever) and
139 * setting this flag breaks the SMB2 open operation since it is
140 * illegal to send an empty path name (without \\server\share prefix)
141 * when the DFS flag is set in the SMB open header. We could
142 * consider setting the flag on all operations other than open
143 * but it is safer to net set it for now.
145 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
146 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
148 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign &&
149 !smb3_encryption_required(tcon))
150 shdr->Flags |= SMB2_FLAGS_SIGNED;
156 smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
159 struct nls_table *nls_codepage;
160 struct cifs_ses *ses;
161 struct TCP_Server_Info *server;
164 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
165 * check for tcp and smb session status done differently
166 * for those three - in the calling routine.
171 if (smb2_command == SMB2_TREE_CONNECT)
174 if (tcon->tidStatus == CifsExiting) {
176 * only tree disconnect, open, and write,
177 * (and ulogoff which does not have tcon)
178 * are allowed as we start force umount.
180 if ((smb2_command != SMB2_WRITE) &&
181 (smb2_command != SMB2_CREATE) &&
182 (smb2_command != SMB2_TREE_DISCONNECT)) {
183 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
188 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
189 (!tcon->ses->server))
193 server = ses->server;
196 * Give demultiplex thread up to 10 seconds to reconnect, should be
197 * greater than cifs socket timeout which is 7 seconds
199 while (server->tcpStatus == CifsNeedReconnect) {
201 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
202 * here since they are implicitly done when session drops.
204 switch (smb2_command) {
206 * BB Should we keep oplock break and add flush to exceptions?
208 case SMB2_TREE_DISCONNECT:
211 case SMB2_OPLOCK_BREAK:
215 rc = wait_event_interruptible_timeout(server->response_q,
216 (server->tcpStatus != CifsNeedReconnect),
219 cifs_dbg(FYI, "%s: aborting reconnect due to a received"
220 " signal by the process\n", __func__);
224 /* are we still trying to reconnect? */
225 if (server->tcpStatus != CifsNeedReconnect)
229 * on "soft" mounts we wait once. Hard mounts keep
230 * retrying until process is killed or server comes
234 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
239 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
242 nls_codepage = load_nls_default();
245 * need to prevent multiple threads trying to simultaneously reconnect
246 * the same SMB session
248 mutex_lock(&tcon->ses->session_mutex);
251 * Recheck after acquire mutex. If another thread is negotiating
252 * and the server never sends an answer the socket will be closed
253 * and tcpStatus set to reconnect.
255 if (server->tcpStatus == CifsNeedReconnect) {
257 mutex_unlock(&tcon->ses->session_mutex);
261 rc = cifs_negotiate_protocol(0, tcon->ses);
262 if (!rc && tcon->ses->need_reconnect)
263 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
265 if (rc || !tcon->need_reconnect) {
266 mutex_unlock(&tcon->ses->session_mutex);
270 cifs_mark_open_files_invalid(tcon);
271 if (tcon->use_persistent)
272 tcon->need_reopen_files = true;
274 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
275 mutex_unlock(&tcon->ses->session_mutex);
277 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
279 /* If sess reconnected but tcon didn't, something strange ... */
280 printk_once(KERN_WARNING "reconnect tcon failed rc = %d\n", rc);
284 if (smb2_command != SMB2_INTERNAL_CMD)
285 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
287 atomic_inc(&tconInfoReconnectCount);
290 * Check if handle based operation so we know whether we can continue
291 * or not without returning to caller to reset file handle.
294 * BB Is flush done by server on drop of tcp session? Should we special
295 * case it and skip above?
297 switch (smb2_command) {
303 case SMB2_QUERY_DIRECTORY:
304 case SMB2_CHANGE_NOTIFY:
305 case SMB2_QUERY_INFO:
309 unload_nls(nls_codepage);
314 fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, void *buf,
315 unsigned int *total_len)
317 struct smb2_sync_pdu *spdu = (struct smb2_sync_pdu *)buf;
318 /* lookup word count ie StructureSize from table */
319 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)];
322 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
323 * largest operations (Create)
327 smb2_hdr_assemble(&spdu->sync_hdr, smb2_command, tcon);
328 spdu->StructureSize2 = cpu_to_le16(parmsize);
330 *total_len = parmsize + sizeof(struct smb2_sync_hdr);
334 * Allocate and return pointer to an SMB request hdr, and set basic
335 * SMB information in the SMB header. If the return code is zero, this
336 * function must have filled in request_buf pointer.
339 smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
340 void **request_buf, unsigned int *total_len)
344 rc = smb2_reconnect(smb2_command, tcon);
348 /* BB eventually switch this to SMB2 specific small buf size */
349 if (smb2_command == SMB2_SET_INFO)
350 *request_buf = cifs_buf_get();
352 *request_buf = cifs_small_buf_get();
353 if (*request_buf == NULL) {
354 /* BB should we add a retry in here if not a writepage? */
358 fill_small_buf(smb2_command, tcon,
359 (struct smb2_sync_hdr *)(*request_buf),
363 #ifdef CONFIG_CIFS_STATS2
364 uint16_t com_code = le16_to_cpu(smb2_command);
365 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
367 cifs_stats_inc(&tcon->num_smbs_sent);
373 #ifdef CONFIG_CIFS_SMB311
374 /* offset is sizeof smb2_negotiate_req but rounded up to 8 bytes */
375 #define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) */
378 #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
379 #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
380 #define SMB2_POSIX_EXTENSIONS_AVAILABLE cpu_to_le16(0x100)
383 build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
385 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
386 pneg_ctxt->DataLength = cpu_to_le16(38);
387 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
388 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
389 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
390 pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
394 build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
396 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
397 pneg_ctxt->DataLength = cpu_to_le16(4); /* Cipher Count + le16 cipher */
398 pneg_ctxt->CipherCount = cpu_to_le16(1);
399 /* pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;*/ /* not supported yet */
400 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_CCM;
404 build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
406 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
407 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
411 assemble_neg_contexts(struct smb2_negotiate_req *req,
412 unsigned int *total_len)
414 char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT;
415 unsigned int ctxt_len;
417 *total_len += 2; /* Add 2 due to round to 8 byte boundary for 1st ctxt */
418 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
419 ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_preauth_neg_context), 8) * 8;
420 *total_len += ctxt_len;
421 pneg_ctxt += ctxt_len;
423 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
424 ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_encryption_neg_context), 8) * 8;
425 *total_len += ctxt_len;
426 pneg_ctxt += ctxt_len;
428 build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
429 *total_len += sizeof(struct smb2_posix_neg_context);
431 req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
432 req->NegotiateContextCount = cpu_to_le16(3);
435 static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt)
437 unsigned int len = le16_to_cpu(ctxt->DataLength);
439 /* If invalid preauth context warn but use what we requested, SHA-512 */
440 if (len < MIN_PREAUTH_CTXT_DATA_LEN) {
441 printk_once(KERN_WARNING "server sent bad preauth context\n");
444 if (le16_to_cpu(ctxt->HashAlgorithmCount) != 1)
445 printk_once(KERN_WARNING "illegal SMB3 hash algorithm count\n");
446 if (ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
447 printk_once(KERN_WARNING "unknown SMB3 hash algorithm\n");
450 static int decode_encrypt_ctx(struct TCP_Server_Info *server,
451 struct smb2_encryption_neg_context *ctxt)
453 unsigned int len = le16_to_cpu(ctxt->DataLength);
455 cifs_dbg(FYI, "decode SMB3.11 encryption neg context of len %d\n", len);
456 if (len < MIN_ENCRYPT_CTXT_DATA_LEN) {
457 printk_once(KERN_WARNING "server sent bad crypto ctxt len\n");
461 if (le16_to_cpu(ctxt->CipherCount) != 1) {
462 printk_once(KERN_WARNING "illegal SMB3.11 cipher count\n");
465 cifs_dbg(FYI, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt->Ciphers[0]));
466 if ((ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_CCM) &&
467 (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_GCM)) {
468 printk_once(KERN_WARNING "invalid SMB3.11 cipher returned\n");
471 server->cipher_type = ctxt->Ciphers[0];
472 server->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
476 static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp,
477 struct TCP_Server_Info *server,
478 unsigned int len_of_smb)
480 struct smb2_neg_context *pctx;
481 unsigned int offset = le32_to_cpu(rsp->NegotiateContextOffset);
482 unsigned int ctxt_cnt = le16_to_cpu(rsp->NegotiateContextCount);
483 unsigned int len_of_ctxts, i;
486 cifs_dbg(FYI, "decoding %d negotiate contexts\n", ctxt_cnt);
487 if (len_of_smb <= offset) {
488 cifs_dbg(VFS, "Invalid response: negotiate context offset\n");
492 len_of_ctxts = len_of_smb - offset;
494 for (i = 0; i < ctxt_cnt; i++) {
496 /* check that offset is not beyond end of SMB */
497 if (len_of_ctxts == 0)
500 if (len_of_ctxts < sizeof(struct smb2_neg_context))
503 pctx = (struct smb2_neg_context *)(offset + (char *)rsp);
504 clen = le16_to_cpu(pctx->DataLength);
505 if (clen > len_of_ctxts)
508 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES)
509 decode_preauth_context(
510 (struct smb2_preauth_neg_context *)pctx);
511 else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES)
512 rc = decode_encrypt_ctx(server,
513 (struct smb2_encryption_neg_context *)pctx);
514 else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE)
515 server->posix_ext_supported = true;
517 cifs_dbg(VFS, "unknown negcontext of type %d ignored\n",
518 le16_to_cpu(pctx->ContextType));
522 /* offsets must be 8 byte aligned */
523 clen = (clen + 7) & ~0x7;
524 offset += clen + sizeof(struct smb2_neg_context);
525 len_of_ctxts -= clen;
530 static struct create_posix *
531 create_posix_buf(umode_t mode)
533 struct create_posix *buf;
535 buf = kzalloc(sizeof(struct create_posix),
540 buf->ccontext.DataOffset =
541 cpu_to_le16(offsetof(struct create_posix, Mode));
542 buf->ccontext.DataLength = cpu_to_le32(4);
543 buf->ccontext.NameOffset =
544 cpu_to_le16(offsetof(struct create_posix, Name));
545 buf->ccontext.NameLength = cpu_to_le16(16);
547 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
558 buf->Name[10] = 0x83;
559 buf->Name[11] = 0xDE;
560 buf->Name[12] = 0x96;
561 buf->Name[13] = 0x8B;
562 buf->Name[14] = 0xCD;
563 buf->Name[15] = 0x7C;
564 buf->Mode = cpu_to_le32(mode);
565 cifs_dbg(FYI, "mode on posix create 0%o", mode);
570 add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode)
572 struct smb2_create_req *req = iov[0].iov_base;
573 unsigned int num = *num_iovec;
575 iov[num].iov_base = create_posix_buf(mode);
576 if (iov[num].iov_base == NULL)
578 iov[num].iov_len = sizeof(struct create_posix);
579 if (!req->CreateContextsOffset)
580 req->CreateContextsOffset = cpu_to_le32(
581 sizeof(struct smb2_create_req) +
582 iov[num - 1].iov_len);
583 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_posix));
584 *num_iovec = num + 1;
589 static void assemble_neg_contexts(struct smb2_negotiate_req *req,
590 unsigned int *total_len)
598 * SMB2 Worker functions follow:
600 * The general structure of the worker functions is:
601 * 1) Call smb2_init (assembles SMB2 header)
602 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
603 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
604 * 4) Decode SMB2 command specific fields in the fixed length area
605 * 5) Decode variable length data area (if any for this SMB2 command type)
606 * 6) Call free smb buffer
612 SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
614 struct smb_rqst rqst;
615 struct smb2_negotiate_req *req;
616 struct smb2_negotiate_rsp *rsp;
621 struct TCP_Server_Info *server = ses->server;
622 int blob_offset, blob_length;
624 int flags = CIFS_NEG_OP;
625 unsigned int total_len;
627 cifs_dbg(FYI, "Negotiate protocol\n");
630 WARN(1, "%s: server is NULL!\n", __func__);
634 rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, (void **) &req, &total_len);
638 req->sync_hdr.SessionId = 0;
639 #ifdef CONFIG_CIFS_SMB311
640 memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
641 memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
644 if (strcmp(ses->server->vals->version_string,
645 SMB3ANY_VERSION_STRING) == 0) {
646 req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
647 req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
648 req->DialectCount = cpu_to_le16(2);
650 } else if (strcmp(ses->server->vals->version_string,
651 SMBDEFAULT_VERSION_STRING) == 0) {
652 req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
653 req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
654 req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
655 req->DialectCount = cpu_to_le16(3);
658 /* otherwise send specific dialect */
659 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
660 req->DialectCount = cpu_to_le16(1);
664 /* only one of SMB2 signing flags may be set in SMB2 request */
666 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
667 else if (global_secflags & CIFSSEC_MAY_SIGN)
668 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
670 req->SecurityMode = 0;
672 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
674 /* ClientGUID must be zero for SMB2.02 dialect */
675 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
676 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
678 memcpy(req->ClientGUID, server->client_guid,
679 SMB2_CLIENT_GUID_SIZE);
680 if (ses->server->vals->protocol_id == SMB311_PROT_ID)
681 assemble_neg_contexts(req, &total_len);
683 iov[0].iov_base = (char *)req;
684 iov[0].iov_len = total_len;
686 memset(&rqst, 0, sizeof(struct smb_rqst));
690 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
691 cifs_small_buf_release(req);
692 rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base;
694 * No tcon so can't do
695 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
697 if (rc == -EOPNOTSUPP) {
698 cifs_dbg(VFS, "Dialect not supported by server. Consider "
699 "specifying vers=1.0 or vers=2.0 on mount for accessing"
705 if (strcmp(ses->server->vals->version_string,
706 SMB3ANY_VERSION_STRING) == 0) {
707 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
709 "SMB2 dialect returned but not requested\n");
711 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
713 "SMB2.1 dialect returned but not requested\n");
716 } else if (strcmp(ses->server->vals->version_string,
717 SMBDEFAULT_VERSION_STRING) == 0) {
718 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
720 "SMB2 dialect returned but not requested\n");
722 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
723 /* ops set to 3.0 by default for default so update */
724 ses->server->ops = &smb21_operations;
726 } else if (le16_to_cpu(rsp->DialectRevision) !=
727 ses->server->vals->protocol_id) {
728 /* if requested single dialect ensure returned dialect matched */
729 cifs_dbg(VFS, "Illegal 0x%x dialect returned: not requested\n",
730 le16_to_cpu(rsp->DialectRevision));
734 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
736 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
737 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
738 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
739 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
740 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
741 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
742 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
743 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
744 #ifdef CONFIG_CIFS_SMB311
745 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
746 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
749 cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
750 le16_to_cpu(rsp->DialectRevision));
754 server->dialect = le16_to_cpu(rsp->DialectRevision);
756 /* BB: add check that dialect was valid given dialect(s) we asked for */
758 #ifdef CONFIG_CIFS_SMB311
760 * Keep a copy of the hash after negprot. This hash will be
761 * the starting hash value for all sessions made from this
764 memcpy(server->preauth_sha_hash, ses->preauth_sha_hash,
765 SMB2_PREAUTH_HASH_SIZE);
767 /* SMB2 only has an extended negflavor */
768 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
769 /* set it to the maximum buffer size value we can send with 1 credit */
770 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
771 SMB2_MAX_BUFFER_SIZE);
772 server->max_read = le32_to_cpu(rsp->MaxReadSize);
773 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
774 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
775 if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode)
776 cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n",
778 server->capabilities = le32_to_cpu(rsp->Capabilities);
780 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
782 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
783 (struct smb2_sync_hdr *)rsp);
785 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
787 * ses->sectype = RawNTLMSSP;
788 * but for time being this is our only auth choice so doesn't matter.
789 * We just found a server which sets blob length to zero expecting raw.
791 if (blob_length == 0) {
792 cifs_dbg(FYI, "missing security blob on negprot\n");
793 server->sec_ntlmssp = true;
796 rc = cifs_enable_signing(server, ses->sign);
800 rc = decode_negTokenInit(security_blob, blob_length, server);
807 #ifdef CONFIG_CIFS_SMB311
808 if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
809 if (rsp->NegotiateContextCount)
810 rc = smb311_decode_neg_context(rsp, server,
813 cifs_dbg(VFS, "Missing expected negotiate contexts\n");
815 #endif /* CONFIG_CIFS_SMB311 */
817 free_rsp_buf(resp_buftype, rsp);
821 int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
824 struct validate_negotiate_info_req *pneg_inbuf;
825 struct validate_negotiate_info_rsp *pneg_rsp = NULL;
827 u32 inbuflen; /* max of 4 dialects */
829 cifs_dbg(FYI, "validate negotiate\n");
831 /* In SMB3.11 preauth integrity supersedes validate negotiate */
832 if (tcon->ses->server->dialect == SMB311_PROT_ID)
836 * validation ioctl must be signed, so no point sending this if we
837 * can not sign it (ie are not known user). Even if signing is not
838 * required (enabled but not negotiated), in those cases we selectively
839 * sign just this, the first and only signed request on a connection.
840 * Having validation of negotiate info helps reduce attack vectors.
842 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
843 return 0; /* validation requires signing */
845 if (tcon->ses->user_name == NULL) {
846 cifs_dbg(FYI, "Can't validate negotiate: null user mount\n");
847 return 0; /* validation requires signing */
850 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
851 cifs_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n");
853 pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS);
857 pneg_inbuf->Capabilities =
858 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
859 memcpy(pneg_inbuf->Guid, tcon->ses->server->client_guid,
860 SMB2_CLIENT_GUID_SIZE);
863 pneg_inbuf->SecurityMode =
864 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
865 else if (global_secflags & CIFSSEC_MAY_SIGN)
866 pneg_inbuf->SecurityMode =
867 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
869 pneg_inbuf->SecurityMode = 0;
872 if (strcmp(tcon->ses->server->vals->version_string,
873 SMB3ANY_VERSION_STRING) == 0) {
874 pneg_inbuf->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
875 pneg_inbuf->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
876 pneg_inbuf->DialectCount = cpu_to_le16(2);
877 /* structure is big enough for 3 dialects, sending only 2 */
878 inbuflen = sizeof(*pneg_inbuf) -
879 sizeof(pneg_inbuf->Dialects[0]);
880 } else if (strcmp(tcon->ses->server->vals->version_string,
881 SMBDEFAULT_VERSION_STRING) == 0) {
882 pneg_inbuf->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
883 pneg_inbuf->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
884 pneg_inbuf->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
885 pneg_inbuf->DialectCount = cpu_to_le16(3);
886 /* structure is big enough for 3 dialects */
887 inbuflen = sizeof(*pneg_inbuf);
889 /* otherwise specific dialect was requested */
890 pneg_inbuf->Dialects[0] =
891 cpu_to_le16(tcon->ses->server->vals->protocol_id);
892 pneg_inbuf->DialectCount = cpu_to_le16(1);
893 /* structure is big enough for 3 dialects, sending only 1 */
894 inbuflen = sizeof(*pneg_inbuf) -
895 sizeof(pneg_inbuf->Dialects[0]) * 2;
898 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
899 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
900 (char *)pneg_inbuf, inbuflen, (char **)&pneg_rsp, &rsplen);
903 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
909 if (rsplen != sizeof(*pneg_rsp)) {
910 cifs_dbg(VFS, "invalid protocol negotiate response size: %d\n",
913 /* relax check since Mac returns max bufsize allowed on ioctl */
914 if (rsplen > CIFSMaxBufSize || rsplen < sizeof(*pneg_rsp))
918 /* check validate negotiate info response matches what we got earlier */
919 if (pneg_rsp->Dialect != cpu_to_le16(tcon->ses->server->dialect))
922 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
925 /* do not validate server guid because not saved at negprot time yet */
927 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
928 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
931 /* validate negotiate successful */
933 cifs_dbg(FYI, "validate negotiate info successful\n");
937 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
946 smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
955 if (server->sec_ntlmssp &&
956 (global_secflags & CIFSSEC_MAY_NTLMSSP))
958 if ((server->sec_kerberos || server->sec_mskerberos) &&
959 (global_secflags & CIFSSEC_MAY_KRB5))
967 struct SMB2_sess_data {
969 struct cifs_ses *ses;
970 struct nls_table *nls_cp;
971 void (*func)(struct SMB2_sess_data *);
973 u64 previous_session;
975 /* we will send the SMB in three pieces:
976 * a fixed length beginning part, an optional
977 * SPNEGO blob (which can be zero length), and a
978 * last part which will include the strings
979 * and rest of bcc area. This allows us to avoid
980 * a large buffer 17K allocation
987 SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
990 struct cifs_ses *ses = sess_data->ses;
991 struct smb2_sess_setup_req *req;
992 struct TCP_Server_Info *server = ses->server;
993 unsigned int total_len;
995 rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, (void **) &req,
1000 /* First session, not a reauthenticate */
1001 req->sync_hdr.SessionId = 0;
1003 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
1004 req->PreviousSessionId = sess_data->previous_session;
1006 req->Flags = 0; /* MBZ */
1008 /* enough to enable echos and oplocks and one max size write */
1009 req->sync_hdr.CreditRequest = cpu_to_le16(130);
1011 /* only one of SMB2 signing flags may be set in SMB2 request */
1013 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
1014 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
1015 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
1017 req->SecurityMode = 0;
1019 req->Capabilities = 0;
1020 req->Channel = 0; /* MBZ */
1022 sess_data->iov[0].iov_base = (char *)req;
1024 sess_data->iov[0].iov_len = total_len - 1;
1026 * This variable will be used to clear the buffer
1027 * allocated above in case of any error in the calling function.
1029 sess_data->buf0_type = CIFS_SMALL_BUFFER;
1035 SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
1037 free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
1038 sess_data->buf0_type = CIFS_NO_BUFFER;
1042 SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
1045 struct smb_rqst rqst;
1046 struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
1047 struct kvec rsp_iov = { NULL, 0 };
1049 /* Testing shows that buffer offset must be at location of Buffer[0] */
1050 req->SecurityBufferOffset =
1051 cpu_to_le16(sizeof(struct smb2_sess_setup_req) - 1 /* pad */);
1052 req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
1054 memset(&rqst, 0, sizeof(struct smb_rqst));
1055 rqst.rq_iov = sess_data->iov;
1058 /* BB add code to build os and lm fields */
1059 rc = cifs_send_recv(sess_data->xid, sess_data->ses,
1061 &sess_data->buf0_type,
1062 CIFS_LOG_ERROR | CIFS_NEG_OP, &rsp_iov);
1063 cifs_small_buf_release(sess_data->iov[0].iov_base);
1064 memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
1070 SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
1073 struct cifs_ses *ses = sess_data->ses;
1075 mutex_lock(&ses->server->srv_mutex);
1076 if (ses->server->ops->generate_signingkey) {
1077 rc = ses->server->ops->generate_signingkey(ses);
1080 "SMB3 session key generation failed\n");
1081 mutex_unlock(&ses->server->srv_mutex);
1085 if (!ses->server->session_estab) {
1086 ses->server->sequence_number = 0x2;
1087 ses->server->session_estab = true;
1089 mutex_unlock(&ses->server->srv_mutex);
1091 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
1092 spin_lock(&GlobalMid_Lock);
1093 ses->status = CifsGood;
1094 ses->need_reconnect = false;
1095 spin_unlock(&GlobalMid_Lock);
1099 #ifdef CONFIG_CIFS_UPCALL
1101 SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1104 struct cifs_ses *ses = sess_data->ses;
1105 struct cifs_spnego_msg *msg;
1106 struct key *spnego_key = NULL;
1107 struct smb2_sess_setup_rsp *rsp = NULL;
1109 rc = SMB2_sess_alloc_buffer(sess_data);
1113 spnego_key = cifs_get_spnego_key(ses);
1114 if (IS_ERR(spnego_key)) {
1115 rc = PTR_ERR(spnego_key);
1120 msg = spnego_key->payload.data[0];
1122 * check version field to make sure that cifs.upcall is
1123 * sending us a response in an expected form
1125 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
1127 "bad cifs.upcall version. Expected %d got %d",
1128 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
1130 goto out_put_spnego_key;
1133 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
1135 if (!ses->auth_key.response) {
1137 "Kerberos can't allocate (%u bytes) memory",
1140 goto out_put_spnego_key;
1142 ses->auth_key.len = msg->sesskey_len;
1144 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
1145 sess_data->iov[1].iov_len = msg->secblob_len;
1147 rc = SMB2_sess_sendreceive(sess_data);
1149 goto out_put_spnego_key;
1151 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1152 ses->Suid = rsp->sync_hdr.SessionId;
1154 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
1156 rc = SMB2_sess_establish_session(sess_data);
1158 key_invalidate(spnego_key);
1159 key_put(spnego_key);
1161 sess_data->result = rc;
1162 sess_data->func = NULL;
1163 SMB2_sess_free_buffer(sess_data);
1167 SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1169 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
1170 sess_data->result = -EOPNOTSUPP;
1171 sess_data->func = NULL;
1176 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
1179 SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
1182 struct cifs_ses *ses = sess_data->ses;
1183 struct smb2_sess_setup_rsp *rsp = NULL;
1184 char *ntlmssp_blob = NULL;
1185 bool use_spnego = false; /* else use raw ntlmssp */
1186 u16 blob_length = 0;
1189 * If memory allocation is successful, caller of this function
1192 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
1193 if (!ses->ntlmssp) {
1197 ses->ntlmssp->sesskey_per_smbsess = true;
1199 rc = SMB2_sess_alloc_buffer(sess_data);
1203 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
1205 if (ntlmssp_blob == NULL) {
1210 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
1212 /* BB eventually need to add this */
1213 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1217 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
1218 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
1220 sess_data->iov[1].iov_base = ntlmssp_blob;
1221 sess_data->iov[1].iov_len = blob_length;
1223 rc = SMB2_sess_sendreceive(sess_data);
1224 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1226 /* If true, rc here is expected and not an error */
1227 if (sess_data->buf0_type != CIFS_NO_BUFFER &&
1228 rsp->sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
1234 if (offsetof(struct smb2_sess_setup_rsp, Buffer) !=
1235 le16_to_cpu(rsp->SecurityBufferOffset)) {
1236 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
1237 le16_to_cpu(rsp->SecurityBufferOffset));
1241 rc = decode_ntlmssp_challenge(rsp->Buffer,
1242 le16_to_cpu(rsp->SecurityBufferLength), ses);
1246 cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
1249 ses->Suid = rsp->sync_hdr.SessionId;
1250 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
1253 kfree(ntlmssp_blob);
1254 SMB2_sess_free_buffer(sess_data);
1256 sess_data->result = 0;
1257 sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
1261 kfree(ses->ntlmssp);
1262 ses->ntlmssp = NULL;
1263 sess_data->result = rc;
1264 sess_data->func = NULL;
1268 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
1271 struct cifs_ses *ses = sess_data->ses;
1272 struct smb2_sess_setup_req *req;
1273 struct smb2_sess_setup_rsp *rsp = NULL;
1274 unsigned char *ntlmssp_blob = NULL;
1275 bool use_spnego = false; /* else use raw ntlmssp */
1276 u16 blob_length = 0;
1278 rc = SMB2_sess_alloc_buffer(sess_data);
1282 req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
1283 req->sync_hdr.SessionId = ses->Suid;
1285 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
1288 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
1293 /* BB eventually need to add this */
1294 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1298 sess_data->iov[1].iov_base = ntlmssp_blob;
1299 sess_data->iov[1].iov_len = blob_length;
1301 rc = SMB2_sess_sendreceive(sess_data);
1305 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1307 ses->Suid = rsp->sync_hdr.SessionId;
1308 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
1310 rc = SMB2_sess_establish_session(sess_data);
1312 kfree(ntlmssp_blob);
1313 SMB2_sess_free_buffer(sess_data);
1314 kfree(ses->ntlmssp);
1315 ses->ntlmssp = NULL;
1316 sess_data->result = rc;
1317 sess_data->func = NULL;
1321 SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data)
1325 type = smb2_select_sectype(ses->server, ses->sectype);
1326 cifs_dbg(FYI, "sess setup type %d\n", type);
1327 if (type == Unspecified) {
1329 "Unable to select appropriate authentication method!");
1335 sess_data->func = SMB2_auth_kerberos;
1338 sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
1341 cifs_dbg(VFS, "secType %d not supported!\n", type);
1349 SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
1350 const struct nls_table *nls_cp)
1353 struct TCP_Server_Info *server = ses->server;
1354 struct SMB2_sess_data *sess_data;
1356 cifs_dbg(FYI, "Session Setup\n");
1359 WARN(1, "%s: server is NULL!\n", __func__);
1363 sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
1367 rc = SMB2_select_sec(ses, sess_data);
1370 sess_data->xid = xid;
1371 sess_data->ses = ses;
1372 sess_data->buf0_type = CIFS_NO_BUFFER;
1373 sess_data->nls_cp = (struct nls_table *) nls_cp;
1374 sess_data->previous_session = ses->Suid;
1376 #ifdef CONFIG_CIFS_SMB311
1378 * Initialize the session hash with the server one.
1380 memcpy(ses->preauth_sha_hash, ses->server->preauth_sha_hash,
1381 SMB2_PREAUTH_HASH_SIZE);
1384 while (sess_data->func)
1385 sess_data->func(sess_data);
1387 if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign))
1388 cifs_dbg(VFS, "signing requested but authenticated as guest\n");
1389 rc = sess_data->result;
1396 SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
1398 struct smb_rqst rqst;
1399 struct smb2_logoff_req *req; /* response is also trivial struct */
1401 struct TCP_Server_Info *server;
1403 unsigned int total_len;
1405 struct kvec rsp_iov;
1408 cifs_dbg(FYI, "disconnect session %p\n", ses);
1410 if (ses && (ses->server))
1411 server = ses->server;
1415 /* no need to send SMB logoff if uid already closed due to reconnect */
1416 if (ses->need_reconnect)
1417 goto smb2_session_already_dead;
1419 rc = smb2_plain_req_init(SMB2_LOGOFF, NULL, (void **) &req, &total_len);
1423 /* since no tcon, smb2_init can not do this, so do here */
1424 req->sync_hdr.SessionId = ses->Suid;
1426 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
1427 flags |= CIFS_TRANSFORM_REQ;
1428 else if (server->sign)
1429 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1431 flags |= CIFS_NO_RESP;
1433 iov[0].iov_base = (char *)req;
1434 iov[0].iov_len = total_len;
1436 memset(&rqst, 0, sizeof(struct smb_rqst));
1440 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
1441 cifs_small_buf_release(req);
1443 * No tcon so can't do
1444 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1447 smb2_session_already_dead:
1451 static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
1453 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
1456 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1458 /* These are similar values to what Windows uses */
1459 static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
1461 tcon->max_chunks = 256;
1462 tcon->max_bytes_chunk = 1048576;
1463 tcon->max_bytes_copy = 16777216;
1467 SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
1468 struct cifs_tcon *tcon, const struct nls_table *cp)
1470 struct smb_rqst rqst;
1471 struct smb2_tree_connect_req *req;
1472 struct smb2_tree_connect_rsp *rsp = NULL;
1474 struct kvec rsp_iov = { NULL, 0 };
1478 __le16 *unc_path = NULL;
1480 unsigned int total_len;
1482 cifs_dbg(FYI, "TCON\n");
1484 if (!(ses->server) || !tree)
1487 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
1488 if (unc_path == NULL)
1491 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
1493 if (unc_path_len < 2) {
1498 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
1501 rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, (void **) &req,
1508 if (smb3_encryption_required(tcon))
1509 flags |= CIFS_TRANSFORM_REQ;
1511 iov[0].iov_base = (char *)req;
1513 iov[0].iov_len = total_len - 1;
1515 /* Testing shows that buffer offset must be at location of Buffer[0] */
1516 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
1518 req->PathLength = cpu_to_le16(unc_path_len - 2);
1519 iov[1].iov_base = unc_path;
1520 iov[1].iov_len = unc_path_len;
1522 /* 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 */
1523 if ((ses->server->dialect == SMB311_PROT_ID) &&
1524 !smb3_encryption_required(tcon))
1525 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1527 memset(&rqst, 0, sizeof(struct smb_rqst));
1531 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
1532 cifs_small_buf_release(req);
1533 rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
1537 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
1538 tcon->need_reconnect = true;
1540 goto tcon_error_exit;
1543 switch (rsp->ShareType) {
1544 case SMB2_SHARE_TYPE_DISK:
1545 cifs_dbg(FYI, "connection to disk share\n");
1547 case SMB2_SHARE_TYPE_PIPE:
1549 cifs_dbg(FYI, "connection to pipe share\n");
1551 case SMB2_SHARE_TYPE_PRINT:
1553 cifs_dbg(FYI, "connection to printer\n");
1556 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
1558 goto tcon_error_exit;
1561 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
1562 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
1563 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1564 tcon->tidStatus = CifsGood;
1565 tcon->need_reconnect = false;
1566 tcon->tid = rsp->sync_hdr.TreeId;
1567 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
1569 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1570 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
1571 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
1574 !(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
1575 cifs_dbg(VFS, "Encryption is requested but not supported\n");
1577 init_copy_chunk_defaults(tcon);
1578 if (tcon->ses->server->ops->validate_negotiate)
1579 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
1581 free_rsp_buf(resp_buftype, rsp);
1586 if (rsp && rsp->sync_hdr.Status == STATUS_BAD_NETWORK_NAME) {
1587 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
1593 SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1595 struct smb_rqst rqst;
1596 struct smb2_tree_disconnect_req *req; /* response is trivial */
1598 struct cifs_ses *ses = tcon->ses;
1600 unsigned int total_len;
1602 struct kvec rsp_iov;
1605 cifs_dbg(FYI, "Tree Disconnect\n");
1607 if (!ses || !(ses->server))
1610 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1613 rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req,
1618 if (smb3_encryption_required(tcon))
1619 flags |= CIFS_TRANSFORM_REQ;
1621 flags |= CIFS_NO_RESP;
1623 iov[0].iov_base = (char *)req;
1624 iov[0].iov_len = total_len;
1626 memset(&rqst, 0, sizeof(struct smb_rqst));
1630 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
1631 cifs_small_buf_release(req);
1633 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1639 static struct create_durable *
1640 create_durable_buf(void)
1642 struct create_durable *buf;
1644 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1648 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1649 (struct create_durable, Data));
1650 buf->ccontext.DataLength = cpu_to_le32(16);
1651 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1652 (struct create_durable, Name));
1653 buf->ccontext.NameLength = cpu_to_le16(4);
1654 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1662 static struct create_durable *
1663 create_reconnect_durable_buf(struct cifs_fid *fid)
1665 struct create_durable *buf;
1667 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1671 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1672 (struct create_durable, Data));
1673 buf->ccontext.DataLength = cpu_to_le32(16);
1674 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1675 (struct create_durable, Name));
1676 buf->ccontext.NameLength = cpu_to_le16(4);
1677 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1678 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
1679 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1688 parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
1689 unsigned int *epoch, char *lease_key)
1692 struct create_context *cc;
1694 unsigned int remaining;
1697 data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset);
1698 remaining = le32_to_cpu(rsp->CreateContextsLength);
1699 cc = (struct create_context *)data_offset;
1700 while (remaining >= sizeof(struct create_context)) {
1701 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
1702 if (le16_to_cpu(cc->NameLength) == 4 &&
1703 strncmp(name, "RqLs", 4) == 0)
1704 return server->ops->parse_lease_buf(cc, epoch,
1707 next = le32_to_cpu(cc->Next);
1711 cc = (struct create_context *)((char *)cc + next);
1718 add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1719 unsigned int *num_iovec, u8 *lease_key, __u8 *oplock)
1721 struct smb2_create_req *req = iov[0].iov_base;
1722 unsigned int num = *num_iovec;
1724 iov[num].iov_base = server->ops->create_lease_buf(lease_key, *oplock);
1725 if (iov[num].iov_base == NULL)
1727 iov[num].iov_len = server->vals->create_lease_size;
1728 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1729 if (!req->CreateContextsOffset)
1730 req->CreateContextsOffset = cpu_to_le32(
1731 sizeof(struct smb2_create_req) +
1732 iov[num - 1].iov_len);
1733 le32_add_cpu(&req->CreateContextsLength,
1734 server->vals->create_lease_size);
1735 *num_iovec = num + 1;
1739 static struct create_durable_v2 *
1740 create_durable_v2_buf(struct cifs_fid *pfid)
1742 struct create_durable_v2 *buf;
1744 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
1748 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1749 (struct create_durable_v2, dcontext));
1750 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
1751 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1752 (struct create_durable_v2, Name));
1753 buf->ccontext.NameLength = cpu_to_le16(4);
1755 buf->dcontext.Timeout = 0; /* Should this be configurable by workload */
1756 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1757 generate_random_uuid(buf->dcontext.CreateGuid);
1758 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
1760 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1768 static struct create_durable_handle_reconnect_v2 *
1769 create_reconnect_durable_v2_buf(struct cifs_fid *fid)
1771 struct create_durable_handle_reconnect_v2 *buf;
1773 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
1778 buf->ccontext.DataOffset =
1779 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1781 buf->ccontext.DataLength =
1782 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
1783 buf->ccontext.NameOffset =
1784 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1786 buf->ccontext.NameLength = cpu_to_le16(4);
1788 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
1789 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
1790 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1791 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
1793 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1802 add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
1803 struct cifs_open_parms *oparms)
1805 struct smb2_create_req *req = iov[0].iov_base;
1806 unsigned int num = *num_iovec;
1808 iov[num].iov_base = create_durable_v2_buf(oparms->fid);
1809 if (iov[num].iov_base == NULL)
1811 iov[num].iov_len = sizeof(struct create_durable_v2);
1812 if (!req->CreateContextsOffset)
1813 req->CreateContextsOffset =
1814 cpu_to_le32(sizeof(struct smb2_create_req) +
1816 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
1817 *num_iovec = num + 1;
1822 add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
1823 struct cifs_open_parms *oparms)
1825 struct smb2_create_req *req = iov[0].iov_base;
1826 unsigned int num = *num_iovec;
1828 /* indicate that we don't need to relock the file */
1829 oparms->reconnect = false;
1831 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
1832 if (iov[num].iov_base == NULL)
1834 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
1835 if (!req->CreateContextsOffset)
1836 req->CreateContextsOffset =
1837 cpu_to_le32(sizeof(struct smb2_create_req) +
1839 le32_add_cpu(&req->CreateContextsLength,
1840 sizeof(struct create_durable_handle_reconnect_v2));
1841 *num_iovec = num + 1;
1846 add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1847 struct cifs_open_parms *oparms, bool use_persistent)
1849 struct smb2_create_req *req = iov[0].iov_base;
1850 unsigned int num = *num_iovec;
1852 if (use_persistent) {
1853 if (oparms->reconnect)
1854 return add_durable_reconnect_v2_context(iov, num_iovec,
1857 return add_durable_v2_context(iov, num_iovec, oparms);
1860 if (oparms->reconnect) {
1861 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1862 /* indicate that we don't need to relock the file */
1863 oparms->reconnect = false;
1865 iov[num].iov_base = create_durable_buf();
1866 if (iov[num].iov_base == NULL)
1868 iov[num].iov_len = sizeof(struct create_durable);
1869 if (!req->CreateContextsOffset)
1870 req->CreateContextsOffset =
1871 cpu_to_le32(sizeof(struct smb2_create_req) +
1873 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
1874 *num_iovec = num + 1;
1879 alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
1880 const char *treename, const __le16 *path)
1882 int treename_len, path_len;
1883 struct nls_table *cp;
1884 const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
1889 treename_len = strlen(treename);
1890 if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\'))
1896 path_len = UniStrnlen((wchar_t *)path, PATH_MAX);
1899 * make room for one path separator between the treename and
1902 *out_len = treename_len + 1 + path_len;
1905 * final path needs to be null-terminated UTF16 with a
1909 *out_size = roundup((*out_len+1)*2, 8);
1910 *out_path = kzalloc(*out_size, GFP_KERNEL);
1914 cp = load_nls_default();
1915 cifs_strtoUTF16(*out_path, treename, treename_len, cp);
1916 UniStrcat(*out_path, sep);
1917 UniStrcat(*out_path, path);
1923 #ifdef CONFIG_CIFS_SMB311
1924 int smb311_posix_mkdir(const unsigned int xid, struct inode *inode,
1925 umode_t mode, struct cifs_tcon *tcon,
1926 const char *full_path,
1927 struct cifs_sb_info *cifs_sb)
1929 struct smb_rqst rqst;
1930 struct smb2_create_req *req;
1931 struct smb2_create_rsp *rsp = NULL;
1932 struct TCP_Server_Info *server;
1933 struct cifs_ses *ses = tcon->ses;
1934 struct kvec iov[3]; /* make sure at least one for each open context */
1935 struct kvec rsp_iov = {NULL, 0};
1938 __le16 *copy_path = NULL;
1941 unsigned int n_iov = 2;
1942 __u32 file_attributes = 0;
1943 char *pc_buf = NULL;
1945 unsigned int total_len;
1946 __le16 *utf16_path = NULL;
1948 cifs_dbg(FYI, "mkdir\n");
1950 /* resource #1: path allocation */
1951 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1955 if (ses && (ses->server))
1956 server = ses->server;
1962 /* resource #2: request */
1963 rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
1968 if (smb3_encryption_required(tcon))
1969 flags |= CIFS_TRANSFORM_REQ;
1971 req->ImpersonationLevel = IL_IMPERSONATION;
1972 req->DesiredAccess = cpu_to_le32(FILE_WRITE_ATTRIBUTES);
1973 /* File attributes ignored on open (used in create though) */
1974 req->FileAttributes = cpu_to_le32(file_attributes);
1975 req->ShareAccess = FILE_SHARE_ALL_LE;
1976 req->CreateDisposition = cpu_to_le32(FILE_CREATE);
1977 req->CreateOptions = cpu_to_le32(CREATE_NOT_FILE);
1979 iov[0].iov_base = (char *)req;
1980 /* -1 since last byte is buf[0] which is sent below (path) */
1981 iov[0].iov_len = total_len - 1;
1983 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
1985 /* [MS-SMB2] 2.2.13 NameOffset:
1986 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
1987 * the SMB2 header, the file name includes a prefix that will
1988 * be processed during DFS name normalization as specified in
1989 * section 3.3.5.9. Otherwise, the file name is relative to
1990 * the share that is identified by the TreeId in the SMB2
1993 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
1996 req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
1997 rc = alloc_path_with_tree_prefix(©_path, ©_size,
1999 tcon->treeName, utf16_path);
2003 req->NameLength = cpu_to_le16(name_len * 2);
2004 uni_path_len = copy_size;
2005 /* free before overwriting resource */
2007 utf16_path = copy_path;
2009 uni_path_len = (2 * UniStrnlen((wchar_t *)utf16_path, PATH_MAX)) + 2;
2010 /* MUST set path len (NameLength) to 0 opening root of share */
2011 req->NameLength = cpu_to_le16(uni_path_len - 2);
2012 if (uni_path_len % 8 != 0) {
2013 copy_size = roundup(uni_path_len, 8);
2014 copy_path = kzalloc(copy_size, GFP_KERNEL);
2019 memcpy((char *)copy_path, (const char *)utf16_path,
2021 uni_path_len = copy_size;
2022 /* free before overwriting resource */
2024 utf16_path = copy_path;
2028 iov[1].iov_len = uni_path_len;
2029 iov[1].iov_base = utf16_path;
2030 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2032 if (tcon->posix_extensions) {
2033 /* resource #3: posix buf */
2034 rc = add_posix_context(iov, &n_iov, mode);
2037 pc_buf = iov[n_iov-1].iov_base;
2041 memset(&rqst, 0, sizeof(struct smb_rqst));
2043 rqst.rq_nvec = n_iov;
2045 /* resource #4: response buffer */
2046 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
2048 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
2049 trace_smb3_posix_mkdir_err(xid, tcon->tid, ses->Suid,
2051 FILE_WRITE_ATTRIBUTES, rc);
2052 goto err_free_rsp_buf;
2055 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2056 trace_smb3_posix_mkdir_done(xid, rsp->PersistentFileId, tcon->tid,
2057 ses->Suid, CREATE_NOT_FILE,
2058 FILE_WRITE_ATTRIBUTES);
2060 SMB2_close(xid, tcon, rsp->PersistentFileId, rsp->VolatileFileId);
2062 /* Eventually save off posix specific response info and timestaps */
2065 free_rsp_buf(resp_buftype, rsp);
2068 cifs_small_buf_release(req);
2076 SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
2077 __u8 *oplock, struct smb2_file_all_info *buf,
2078 struct kvec *err_iov, int *buftype)
2080 struct smb_rqst rqst;
2081 struct smb2_create_req *req;
2082 struct smb2_create_rsp *rsp;
2083 struct TCP_Server_Info *server;
2084 struct cifs_tcon *tcon = oparms->tcon;
2085 struct cifs_ses *ses = tcon->ses;
2086 struct kvec iov[5]; /* make sure at least one for each open context */
2087 struct kvec rsp_iov = {NULL, 0};
2090 __le16 *copy_path = NULL;
2093 unsigned int n_iov = 2;
2094 __u32 file_attributes = 0;
2095 char *dhc_buf = NULL, *lc_buf = NULL, *pc_buf = NULL;
2097 unsigned int total_len;
2099 cifs_dbg(FYI, "create/open\n");
2101 if (ses && (ses->server))
2102 server = ses->server;
2106 rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
2111 if (smb3_encryption_required(tcon))
2112 flags |= CIFS_TRANSFORM_REQ;
2114 if (oparms->create_options & CREATE_OPTION_READONLY)
2115 file_attributes |= ATTR_READONLY;
2116 if (oparms->create_options & CREATE_OPTION_SPECIAL)
2117 file_attributes |= ATTR_SYSTEM;
2119 req->ImpersonationLevel = IL_IMPERSONATION;
2120 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
2121 /* File attributes ignored on open (used in create though) */
2122 req->FileAttributes = cpu_to_le32(file_attributes);
2123 req->ShareAccess = FILE_SHARE_ALL_LE;
2124 req->CreateDisposition = cpu_to_le32(oparms->disposition);
2125 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
2127 iov[0].iov_base = (char *)req;
2128 /* -1 since last byte is buf[0] which is sent below (path) */
2129 iov[0].iov_len = total_len - 1;
2131 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
2133 /* [MS-SMB2] 2.2.13 NameOffset:
2134 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2135 * the SMB2 header, the file name includes a prefix that will
2136 * be processed during DFS name normalization as specified in
2137 * section 3.3.5.9. Otherwise, the file name is relative to
2138 * the share that is identified by the TreeId in the SMB2
2141 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
2144 req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
2145 rc = alloc_path_with_tree_prefix(©_path, ©_size,
2147 tcon->treeName, path);
2149 cifs_small_buf_release(req);
2152 req->NameLength = cpu_to_le16(name_len * 2);
2153 uni_path_len = copy_size;
2156 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
2157 /* MUST set path len (NameLength) to 0 opening root of share */
2158 req->NameLength = cpu_to_le16(uni_path_len - 2);
2159 if (uni_path_len % 8 != 0) {
2160 copy_size = roundup(uni_path_len, 8);
2161 copy_path = kzalloc(copy_size, GFP_KERNEL);
2163 cifs_small_buf_release(req);
2166 memcpy((char *)copy_path, (const char *)path,
2168 uni_path_len = copy_size;
2173 iov[1].iov_len = uni_path_len;
2174 iov[1].iov_base = path;
2176 if (!server->oplocks)
2177 *oplock = SMB2_OPLOCK_LEVEL_NONE;
2179 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
2180 *oplock == SMB2_OPLOCK_LEVEL_NONE)
2181 req->RequestedOplockLevel = *oplock;
2183 rc = add_lease_context(server, iov, &n_iov,
2184 oparms->fid->lease_key, oplock);
2186 cifs_small_buf_release(req);
2190 lc_buf = iov[n_iov-1].iov_base;
2193 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
2194 /* need to set Next field of lease context if we request it */
2195 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
2196 struct create_context *ccontext =
2197 (struct create_context *)iov[n_iov-1].iov_base;
2199 cpu_to_le32(server->vals->create_lease_size);
2202 rc = add_durable_context(iov, &n_iov, oparms,
2203 tcon->use_persistent);
2205 cifs_small_buf_release(req);
2210 dhc_buf = iov[n_iov-1].iov_base;
2213 #ifdef CONFIG_CIFS_SMB311
2214 if (tcon->posix_extensions) {
2216 struct create_context *ccontext =
2217 (struct create_context *)iov[n_iov-1].iov_base;
2219 cpu_to_le32(iov[n_iov-1].iov_len);
2222 rc = add_posix_context(iov, &n_iov, oparms->mode);
2224 cifs_small_buf_release(req);
2230 pc_buf = iov[n_iov-1].iov_base;
2234 memset(&rqst, 0, sizeof(struct smb_rqst));
2236 rqst.rq_nvec = n_iov;
2238 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
2240 cifs_small_buf_release(req);
2241 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2244 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
2245 if (err_iov && rsp) {
2247 *buftype = resp_buftype;
2248 resp_buftype = CIFS_NO_BUFFER;
2251 trace_smb3_open_err(xid, tcon->tid, ses->Suid,
2252 oparms->create_options, oparms->desired_access, rc);
2255 trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid,
2256 ses->Suid, oparms->create_options,
2257 oparms->desired_access);
2259 oparms->fid->persistent_fid = rsp->PersistentFileId;
2260 oparms->fid->volatile_fid = rsp->VolatileFileId;
2263 memcpy(buf, &rsp->CreationTime, 32);
2264 buf->AllocationSize = rsp->AllocationSize;
2265 buf->EndOfFile = rsp->EndofFile;
2266 buf->Attributes = rsp->FileAttributes;
2267 buf->NumberOfLinks = cpu_to_le32(1);
2268 buf->DeletePending = 0;
2271 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
2272 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch,
2273 oparms->fid->lease_key);
2275 *oplock = rsp->OplockLevel;
2281 free_rsp_buf(resp_buftype, rsp);
2286 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
2289 SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2290 u64 volatile_fid, u32 opcode, bool is_fsctl,
2291 char *in_data, u32 indatalen,
2292 char **out_data, u32 *plen /* returned data len */)
2294 struct smb_rqst rqst;
2295 struct smb2_ioctl_req *req;
2296 struct smb2_ioctl_rsp *rsp;
2297 struct cifs_ses *ses;
2299 struct kvec rsp_iov;
2304 unsigned int total_len;
2306 cifs_dbg(FYI, "SMB2 IOCTL\n");
2308 if (out_data != NULL)
2311 /* zero out returned data len, in case of error */
2320 if (!ses || !(ses->server))
2323 rc = smb2_plain_req_init(SMB2_IOCTL, tcon, (void **) &req, &total_len);
2327 if (smb3_encryption_required(tcon))
2328 flags |= CIFS_TRANSFORM_REQ;
2330 req->CtlCode = cpu_to_le32(opcode);
2331 req->PersistentFileId = persistent_fid;
2332 req->VolatileFileId = volatile_fid;
2335 req->InputCount = cpu_to_le32(indatalen);
2336 /* do not set InputOffset if no input data */
2338 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer));
2339 iov[1].iov_base = in_data;
2340 iov[1].iov_len = indatalen;
2345 req->OutputOffset = 0;
2346 req->OutputCount = 0; /* MBZ */
2349 * Could increase MaxOutputResponse, but that would require more
2350 * than one credit. Windows typically sets this smaller, but for some
2351 * ioctls it may be useful to allow server to send more. No point
2352 * limiting what the server can send as long as fits in one credit
2353 * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE
2354 * (by default, note that it can be overridden to make max larger)
2355 * in responses (except for read responses which can be bigger.
2356 * We may want to bump this limit up
2358 req->MaxOutputResponse = cpu_to_le32(CIFSMaxBufSize);
2361 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
2365 iov[0].iov_base = (char *)req;
2368 * If no input data, the size of ioctl struct in
2369 * protocol spec still includes a 1 byte data buffer,
2370 * but if input data passed to ioctl, we do not
2371 * want to double count this, so we do not send
2372 * the dummy one byte of data in iovec[0] if sending
2373 * input data (in iovec[1]).
2377 iov[0].iov_len = total_len - 1;
2379 iov[0].iov_len = total_len;
2381 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
2382 if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO)
2383 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
2385 memset(&rqst, 0, sizeof(struct smb_rqst));
2387 rqst.rq_nvec = n_iov;
2389 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
2391 cifs_small_buf_release(req);
2392 rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
2395 trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid,
2396 ses->Suid, 0, opcode, rc);
2398 if ((rc != 0) && (rc != -EINVAL)) {
2399 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
2401 } else if (rc == -EINVAL) {
2402 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
2403 (opcode != FSCTL_SRV_COPYCHUNK)) {
2404 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
2409 /* check if caller wants to look at return data or just return rc */
2410 if ((plen == NULL) || (out_data == NULL))
2413 *plen = le32_to_cpu(rsp->OutputCount);
2415 /* We check for obvious errors in the output buffer length and offset */
2417 goto ioctl_exit; /* server returned no data */
2418 else if (*plen > 0xFF00) {
2419 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
2425 if (rsp_iov.iov_len < le32_to_cpu(rsp->OutputOffset) + *plen) {
2426 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
2427 le32_to_cpu(rsp->OutputOffset));
2433 *out_data = kmalloc(*plen, GFP_KERNEL);
2434 if (*out_data == NULL) {
2439 memcpy(*out_data, (char *)rsp + le32_to_cpu(rsp->OutputOffset), *plen);
2441 free_rsp_buf(resp_buftype, rsp);
2446 * Individual callers to ioctl worker function follow
2450 SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2451 u64 persistent_fid, u64 volatile_fid)
2454 struct compress_ioctl fsctl_input;
2455 char *ret_data = NULL;
2457 fsctl_input.CompressionState =
2458 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
2460 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
2461 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
2462 (char *)&fsctl_input /* data input */,
2463 2 /* in data len */, &ret_data /* out data */, NULL);
2465 cifs_dbg(FYI, "set compression rc %d\n", rc);
2471 SMB2_close_flags(const unsigned int xid, struct cifs_tcon *tcon,
2472 u64 persistent_fid, u64 volatile_fid, int flags)
2474 struct smb_rqst rqst;
2475 struct smb2_close_req *req;
2476 struct smb2_close_rsp *rsp;
2477 struct cifs_ses *ses = tcon->ses;
2479 struct kvec rsp_iov;
2482 unsigned int total_len;
2484 cifs_dbg(FYI, "Close\n");
2486 if (!ses || !(ses->server))
2489 rc = smb2_plain_req_init(SMB2_CLOSE, tcon, (void **) &req, &total_len);
2493 if (smb3_encryption_required(tcon))
2494 flags |= CIFS_TRANSFORM_REQ;
2496 req->PersistentFileId = persistent_fid;
2497 req->VolatileFileId = volatile_fid;
2499 iov[0].iov_base = (char *)req;
2500 iov[0].iov_len = total_len;
2502 memset(&rqst, 0, sizeof(struct smb_rqst));
2506 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
2507 cifs_small_buf_release(req);
2508 rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
2511 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
2512 trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid,
2517 /* BB FIXME - decode close response, update inode for caching */
2520 free_rsp_buf(resp_buftype, rsp);
2525 SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
2526 u64 persistent_fid, u64 volatile_fid)
2528 return SMB2_close_flags(xid, tcon, persistent_fid, volatile_fid, 0);
2532 validate_iov(unsigned int offset, unsigned int buffer_length,
2533 struct kvec *iov, unsigned int min_buf_size)
2535 unsigned int smb_len = iov->iov_len;
2536 char *end_of_smb = smb_len + (char *)iov->iov_base;
2537 char *begin_of_buf = offset + (char *)iov->iov_base;
2538 char *end_of_buf = begin_of_buf + buffer_length;
2541 if (buffer_length < min_buf_size) {
2542 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
2543 buffer_length, min_buf_size);
2547 /* check if beyond RFC1001 maximum length */
2548 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
2549 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
2550 buffer_length, smb_len);
2554 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
2555 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
2563 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2564 * Caller must free buffer.
2567 validate_and_copy_iov(unsigned int offset, unsigned int buffer_length,
2568 struct kvec *iov, unsigned int minbufsize,
2571 char *begin_of_buf = offset + (char *)iov->iov_base;
2577 rc = validate_iov(offset, buffer_length, iov, minbufsize);
2581 memcpy(data, begin_of_buf, buffer_length);
2587 query_info(const unsigned int xid, struct cifs_tcon *tcon,
2588 u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
2589 u32 additional_info, size_t output_len, size_t min_len, void **data,
2592 struct smb_rqst rqst;
2593 struct smb2_query_info_req *req;
2594 struct smb2_query_info_rsp *rsp = NULL;
2596 struct kvec rsp_iov;
2599 struct cifs_ses *ses = tcon->ses;
2601 unsigned int total_len;
2603 cifs_dbg(FYI, "Query Info\n");
2605 if (!ses || !(ses->server))
2608 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
2613 if (smb3_encryption_required(tcon))
2614 flags |= CIFS_TRANSFORM_REQ;
2616 req->InfoType = info_type;
2617 req->FileInfoClass = info_class;
2618 req->PersistentFileId = persistent_fid;
2619 req->VolatileFileId = volatile_fid;
2620 req->AdditionalInformation = cpu_to_le32(additional_info);
2623 * We do not use the input buffer (do not send extra byte)
2625 req->InputBufferOffset = 0;
2627 req->OutputBufferLength = cpu_to_le32(output_len);
2629 iov[0].iov_base = (char *)req;
2631 iov[0].iov_len = total_len - 1;
2633 memset(&rqst, 0, sizeof(struct smb_rqst));
2637 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
2638 cifs_small_buf_release(req);
2639 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2642 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2643 trace_smb3_query_info_err(xid, persistent_fid, tcon->tid,
2644 ses->Suid, info_class, (__u32)info_type, rc);
2649 *dlen = le32_to_cpu(rsp->OutputBufferLength);
2651 *data = kmalloc(*dlen, GFP_KERNEL);
2654 "Error %d allocating memory for acl\n",
2662 rc = validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset),
2663 le32_to_cpu(rsp->OutputBufferLength),
2664 &rsp_iov, min_len, *data);
2667 free_rsp_buf(resp_buftype, rsp);
2671 int SMB2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
2672 u64 persistent_fid, u64 volatile_fid,
2673 int ea_buf_size, struct smb2_file_full_ea_info *data)
2675 return query_info(xid, tcon, persistent_fid, volatile_fid,
2676 FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, 0,
2678 sizeof(struct smb2_file_full_ea_info),
2683 int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
2684 u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data)
2686 return query_info(xid, tcon, persistent_fid, volatile_fid,
2687 FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0,
2688 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
2689 sizeof(struct smb2_file_all_info), (void **)&data,
2694 SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
2695 u64 persistent_fid, u64 volatile_fid,
2696 void **data, u32 *plen)
2698 __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO;
2701 return query_info(xid, tcon, persistent_fid, volatile_fid,
2702 0, SMB2_O_INFO_SECURITY, additional_info,
2703 SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen);
2707 SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
2708 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
2710 return query_info(xid, tcon, persistent_fid, volatile_fid,
2711 FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0,
2712 sizeof(struct smb2_file_internal_info),
2713 sizeof(struct smb2_file_internal_info),
2714 (void **)&uniqueid, NULL);
2718 * This is a no-op for now. We're not really interested in the reply, but
2719 * rather in the fact that the server sent one and that server->lstrp
2722 * FIXME: maybe we should consider checking that the reply matches request?
2725 smb2_echo_callback(struct mid_q_entry *mid)
2727 struct TCP_Server_Info *server = mid->callback_data;
2728 struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
2729 unsigned int credits_received = 1;
2731 if (mid->mid_state == MID_RESPONSE_RECEIVED)
2732 credits_received = le16_to_cpu(rsp->sync_hdr.CreditRequest);
2734 DeleteMidQEntry(mid);
2735 add_credits(server, credits_received, CIFS_ECHO_OP);
2738 void smb2_reconnect_server(struct work_struct *work)
2740 struct TCP_Server_Info *server = container_of(work,
2741 struct TCP_Server_Info, reconnect.work);
2742 struct cifs_ses *ses;
2743 struct cifs_tcon *tcon, *tcon2;
2744 struct list_head tmp_list;
2745 int tcon_exist = false;
2747 int resched = false;
2750 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2751 mutex_lock(&server->reconnect_mutex);
2753 INIT_LIST_HEAD(&tmp_list);
2754 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
2756 spin_lock(&cifs_tcp_ses_lock);
2757 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2758 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2759 if (tcon->need_reconnect || tcon->need_reopen_files) {
2761 list_add_tail(&tcon->rlist, &tmp_list);
2765 if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) {
2766 list_add_tail(&ses->tcon_ipc->rlist, &tmp_list);
2771 * Get the reference to server struct to be sure that the last call of
2772 * cifs_put_tcon() in the loop below won't release the server pointer.
2775 server->srv_count++;
2777 spin_unlock(&cifs_tcp_ses_lock);
2779 list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
2780 rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon);
2782 cifs_reopen_persistent_handles(tcon);
2785 list_del_init(&tcon->rlist);
2786 cifs_put_tcon(tcon);
2789 cifs_dbg(FYI, "Reconnecting tcons finished\n");
2791 queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
2792 mutex_unlock(&server->reconnect_mutex);
2794 /* now we can safely release srv struct */
2796 cifs_put_tcp_session(server, 1);
2800 SMB2_echo(struct TCP_Server_Info *server)
2802 struct smb2_echo_req *req;
2805 struct smb_rqst rqst = { .rq_iov = iov,
2807 unsigned int total_len;
2809 cifs_dbg(FYI, "In echo request\n");
2811 if (server->tcpStatus == CifsNeedNegotiate) {
2812 /* No need to send echo on newly established connections */
2813 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
2817 rc = smb2_plain_req_init(SMB2_ECHO, NULL, (void **)&req, &total_len);
2821 req->sync_hdr.CreditRequest = cpu_to_le16(1);
2823 iov[0].iov_len = total_len;
2824 iov[0].iov_base = (char *)req;
2826 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
2827 server, CIFS_ECHO_OP);
2829 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
2831 cifs_small_buf_release(req);
2836 SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2839 struct smb_rqst rqst;
2840 struct smb2_flush_req *req;
2841 struct cifs_ses *ses = tcon->ses;
2843 struct kvec rsp_iov;
2847 unsigned int total_len;
2849 cifs_dbg(FYI, "Flush\n");
2851 if (!ses || !(ses->server))
2854 rc = smb2_plain_req_init(SMB2_FLUSH, tcon, (void **) &req, &total_len);
2858 if (smb3_encryption_required(tcon))
2859 flags |= CIFS_TRANSFORM_REQ;
2861 req->PersistentFileId = persistent_fid;
2862 req->VolatileFileId = volatile_fid;
2864 iov[0].iov_base = (char *)req;
2865 iov[0].iov_len = total_len;
2867 memset(&rqst, 0, sizeof(struct smb_rqst));
2871 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
2872 cifs_small_buf_release(req);
2875 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
2876 trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid,
2880 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
2885 * To form a chain of read requests, any read requests after the first should
2886 * have the end_of_chain boolean set to true.
2889 smb2_new_read_req(void **buf, unsigned int *total_len,
2890 struct cifs_io_parms *io_parms, struct cifs_readdata *rdata,
2891 unsigned int remaining_bytes, int request_type)
2894 struct smb2_read_plain_req *req = NULL;
2895 struct smb2_sync_hdr *shdr;
2896 struct TCP_Server_Info *server;
2898 rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
2903 server = io_parms->tcon->ses->server;
2905 return -ECONNABORTED;
2907 shdr = &req->sync_hdr;
2908 shdr->ProcessId = cpu_to_le32(io_parms->pid);
2910 req->PersistentFileId = io_parms->persistent_fid;
2911 req->VolatileFileId = io_parms->volatile_fid;
2912 req->ReadChannelInfoOffset = 0; /* reserved */
2913 req->ReadChannelInfoLength = 0; /* reserved */
2914 req->Channel = 0; /* reserved */
2915 req->MinimumCount = 0;
2916 req->Length = cpu_to_le32(io_parms->length);
2917 req->Offset = cpu_to_le64(io_parms->offset);
2918 #ifdef CONFIG_CIFS_SMB_DIRECT
2920 * If we want to do a RDMA write, fill in and append
2921 * smbd_buffer_descriptor_v1 to the end of read request
2923 if (server->rdma && rdata && !server->sign &&
2924 rdata->bytes >= server->smbd_conn->rdma_readwrite_threshold) {
2926 struct smbd_buffer_descriptor_v1 *v1;
2927 bool need_invalidate =
2928 io_parms->tcon->ses->server->dialect == SMB30_PROT_ID;
2930 rdata->mr = smbd_register_mr(
2931 server->smbd_conn, rdata->pages,
2932 rdata->nr_pages, rdata->page_offset,
2933 rdata->tailsz, true, need_invalidate);
2937 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
2938 if (need_invalidate)
2939 req->Channel = SMB2_CHANNEL_RDMA_V1;
2940 req->ReadChannelInfoOffset =
2941 cpu_to_le16(offsetof(struct smb2_read_plain_req, Buffer));
2942 req->ReadChannelInfoLength =
2943 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
2944 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
2945 v1->offset = cpu_to_le64(rdata->mr->mr->iova);
2946 v1->token = cpu_to_le32(rdata->mr->mr->rkey);
2947 v1->length = cpu_to_le32(rdata->mr->mr->length);
2949 *total_len += sizeof(*v1) - 1;
2952 if (request_type & CHAINED_REQUEST) {
2953 if (!(request_type & END_OF_CHAIN)) {
2954 /* next 8-byte aligned request */
2955 *total_len = DIV_ROUND_UP(*total_len, 8) * 8;
2956 shdr->NextCommand = cpu_to_le32(*total_len);
2957 } else /* END_OF_CHAIN */
2958 shdr->NextCommand = 0;
2959 if (request_type & RELATED_REQUEST) {
2960 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2962 * Related requests use info from previous read request
2965 shdr->SessionId = 0xFFFFFFFF;
2966 shdr->TreeId = 0xFFFFFFFF;
2967 req->PersistentFileId = 0xFFFFFFFF;
2968 req->VolatileFileId = 0xFFFFFFFF;
2971 if (remaining_bytes > io_parms->length)
2972 req->RemainingBytes = cpu_to_le32(remaining_bytes);
2974 req->RemainingBytes = 0;
2981 smb2_readv_callback(struct mid_q_entry *mid)
2983 struct cifs_readdata *rdata = mid->callback_data;
2984 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
2985 struct TCP_Server_Info *server = tcon->ses->server;
2986 struct smb2_sync_hdr *shdr =
2987 (struct smb2_sync_hdr *)rdata->iov[0].iov_base;
2988 unsigned int credits_received = 1;
2989 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2991 .rq_pages = rdata->pages,
2992 .rq_offset = rdata->page_offset,
2993 .rq_npages = rdata->nr_pages,
2994 .rq_pagesz = rdata->pagesz,
2995 .rq_tailsz = rdata->tailsz };
2997 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2998 __func__, mid->mid, mid->mid_state, rdata->result,
3001 switch (mid->mid_state) {
3002 case MID_RESPONSE_RECEIVED:
3003 credits_received = le16_to_cpu(shdr->CreditRequest);
3004 /* result already set, check signature */
3005 if (server->sign && !mid->decrypted) {
3008 rc = smb2_verify_signature(&rqst, server);
3010 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
3013 /* FIXME: should this be counted toward the initiating task? */
3014 task_io_account_read(rdata->got_bytes);
3015 cifs_stats_bytes_read(tcon, rdata->got_bytes);
3017 case MID_REQUEST_SUBMITTED:
3018 case MID_RETRY_NEEDED:
3019 rdata->result = -EAGAIN;
3020 if (server->sign && rdata->got_bytes)
3021 /* reset bytes number since we can not check a sign */
3022 rdata->got_bytes = 0;
3023 /* FIXME: should this be counted toward the initiating task? */
3024 task_io_account_read(rdata->got_bytes);
3025 cifs_stats_bytes_read(tcon, rdata->got_bytes);
3028 if (rdata->result != -ENODATA)
3029 rdata->result = -EIO;
3031 #ifdef CONFIG_CIFS_SMB_DIRECT
3033 * If this rdata has a memmory registered, the MR can be freed
3034 * MR needs to be freed as soon as I/O finishes to prevent deadlock
3035 * because they have limited number and are used for future I/Os
3038 smbd_deregister_mr(rdata->mr);
3043 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
3045 queue_work(cifsiod_wq, &rdata->work);
3046 DeleteMidQEntry(mid);
3047 add_credits(server, credits_received, 0);
3050 /* smb2_async_readv - send an async read, and set up mid to handle result */
3052 smb2_async_readv(struct cifs_readdata *rdata)
3056 struct smb2_sync_hdr *shdr;
3057 struct cifs_io_parms io_parms;
3058 struct smb_rqst rqst = { .rq_iov = rdata->iov,
3060 struct TCP_Server_Info *server;
3061 unsigned int total_len;
3063 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
3064 __func__, rdata->offset, rdata->bytes);
3066 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
3067 io_parms.offset = rdata->offset;
3068 io_parms.length = rdata->bytes;
3069 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
3070 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
3071 io_parms.pid = rdata->pid;
3073 server = io_parms.tcon->ses->server;
3075 rc = smb2_new_read_req(
3076 (void **) &buf, &total_len, &io_parms, rdata, 0, 0);
3078 if (rc == -EAGAIN && rdata->credits) {
3079 /* credits was reset by reconnect */
3081 /* reduce in_flight value since we won't send the req */
3082 spin_lock(&server->req_lock);
3083 server->in_flight--;
3084 spin_unlock(&server->req_lock);
3089 if (smb3_encryption_required(io_parms.tcon))
3090 flags |= CIFS_TRANSFORM_REQ;
3092 rdata->iov[0].iov_base = buf;
3093 rdata->iov[0].iov_len = total_len;
3095 shdr = (struct smb2_sync_hdr *)buf;
3097 if (rdata->credits) {
3098 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
3099 SMB2_MAX_BUFFER_SIZE));
3100 shdr->CreditRequest = shdr->CreditCharge;
3101 spin_lock(&server->req_lock);
3102 server->credits += rdata->credits -
3103 le16_to_cpu(shdr->CreditCharge);
3104 spin_unlock(&server->req_lock);
3105 wake_up(&server->request_q);
3106 flags |= CIFS_HAS_CREDITS;
3109 kref_get(&rdata->refcount);
3110 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
3111 cifs_readv_receive, smb2_readv_callback,
3112 smb3_handle_read_data, rdata, flags);
3114 kref_put(&rdata->refcount, cifs_readdata_release);
3115 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
3116 trace_smb3_read_err(rc, 0 /* xid */, io_parms.persistent_fid,
3117 io_parms.tcon->tid, io_parms.tcon->ses->Suid,
3118 io_parms.offset, io_parms.length);
3120 trace_smb3_read_done(0 /* xid */, io_parms.persistent_fid,
3121 io_parms.tcon->tid, io_parms.tcon->ses->Suid,
3122 io_parms.offset, io_parms.length);
3124 cifs_small_buf_release(buf);
3129 SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
3130 unsigned int *nbytes, char **buf, int *buf_type)
3132 struct smb_rqst rqst;
3133 int resp_buftype, rc = -EACCES;
3134 struct smb2_read_plain_req *req = NULL;
3135 struct smb2_read_rsp *rsp = NULL;
3137 struct kvec rsp_iov;
3138 unsigned int total_len;
3139 int flags = CIFS_LOG_ERROR;
3140 struct cifs_ses *ses = io_parms->tcon->ses;
3143 rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0);
3147 if (smb3_encryption_required(io_parms->tcon))
3148 flags |= CIFS_TRANSFORM_REQ;
3150 iov[0].iov_base = (char *)req;
3151 iov[0].iov_len = total_len;
3153 memset(&rqst, 0, sizeof(struct smb_rqst));
3157 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
3158 cifs_small_buf_release(req);
3160 rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
3163 if (rc != -ENODATA) {
3164 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
3165 cifs_dbg(VFS, "Send error in read = %d\n", rc);
3167 trace_smb3_read_err(rc, xid, req->PersistentFileId,
3168 io_parms->tcon->tid, ses->Suid,
3169 io_parms->offset, io_parms->length);
3170 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
3171 return rc == -ENODATA ? 0 : rc;
3173 trace_smb3_read_done(xid, req->PersistentFileId,
3174 io_parms->tcon->tid, ses->Suid,
3175 io_parms->offset, io_parms->length);
3177 *nbytes = le32_to_cpu(rsp->DataLength);
3178 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
3179 (*nbytes > io_parms->length)) {
3180 cifs_dbg(FYI, "bad length %d for count %d\n",
3181 *nbytes, io_parms->length);
3187 memcpy(*buf, (char *)rsp + rsp->DataOffset, *nbytes);
3188 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
3189 } else if (resp_buftype != CIFS_NO_BUFFER) {
3190 *buf = rsp_iov.iov_base;
3191 if (resp_buftype == CIFS_SMALL_BUFFER)
3192 *buf_type = CIFS_SMALL_BUFFER;
3193 else if (resp_buftype == CIFS_LARGE_BUFFER)
3194 *buf_type = CIFS_LARGE_BUFFER;
3200 * Check the mid_state and signature on received buffer (if any), and queue the
3201 * workqueue completion task.
3204 smb2_writev_callback(struct mid_q_entry *mid)
3206 struct cifs_writedata *wdata = mid->callback_data;
3207 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
3208 unsigned int written;
3209 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
3210 unsigned int credits_received = 1;
3212 switch (mid->mid_state) {
3213 case MID_RESPONSE_RECEIVED:
3214 credits_received = le16_to_cpu(rsp->sync_hdr.CreditRequest);
3215 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
3216 if (wdata->result != 0)
3219 written = le32_to_cpu(rsp->DataLength);
3221 * Mask off high 16 bits when bytes written as returned
3222 * by the server is greater than bytes requested by the
3223 * client. OS/2 servers are known to set incorrect
3226 if (written > wdata->bytes)
3229 if (written < wdata->bytes)
3230 wdata->result = -ENOSPC;
3232 wdata->bytes = written;
3234 case MID_REQUEST_SUBMITTED:
3235 case MID_RETRY_NEEDED:
3236 wdata->result = -EAGAIN;
3239 wdata->result = -EIO;
3242 #ifdef CONFIG_CIFS_SMB_DIRECT
3244 * If this wdata has a memory registered, the MR can be freed
3245 * The number of MRs available is limited, it's important to recover
3246 * used MR as soon as I/O is finished. Hold MR longer in the later
3247 * I/O process can possibly result in I/O deadlock due to lack of MR
3248 * to send request on I/O retry
3251 smbd_deregister_mr(wdata->mr);
3256 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
3258 queue_work(cifsiod_wq, &wdata->work);
3259 DeleteMidQEntry(mid);
3260 add_credits(tcon->ses->server, credits_received, 0);
3263 /* smb2_async_writev - send an async write, and set up mid to handle result */
3265 smb2_async_writev(struct cifs_writedata *wdata,
3266 void (*release)(struct kref *kref))
3268 int rc = -EACCES, flags = 0;
3269 struct smb2_write_req *req = NULL;
3270 struct smb2_sync_hdr *shdr;
3271 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
3272 struct TCP_Server_Info *server = tcon->ses->server;
3274 struct smb_rqst rqst = { };
3275 unsigned int total_len;
3277 rc = smb2_plain_req_init(SMB2_WRITE, tcon, (void **) &req, &total_len);
3279 if (rc == -EAGAIN && wdata->credits) {
3280 /* credits was reset by reconnect */
3282 /* reduce in_flight value since we won't send the req */
3283 spin_lock(&server->req_lock);
3284 server->in_flight--;
3285 spin_unlock(&server->req_lock);
3287 goto async_writev_out;
3290 if (smb3_encryption_required(tcon))
3291 flags |= CIFS_TRANSFORM_REQ;
3293 shdr = (struct smb2_sync_hdr *)req;
3294 shdr->ProcessId = cpu_to_le32(wdata->cfile->pid);
3296 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
3297 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
3298 req->WriteChannelInfoOffset = 0;
3299 req->WriteChannelInfoLength = 0;
3301 req->Offset = cpu_to_le64(wdata->offset);
3302 req->DataOffset = cpu_to_le16(
3303 offsetof(struct smb2_write_req, Buffer));
3304 req->RemainingBytes = 0;
3305 #ifdef CONFIG_CIFS_SMB_DIRECT
3307 * If we want to do a server RDMA read, fill in and append
3308 * smbd_buffer_descriptor_v1 to the end of write request
3310 if (server->rdma && !server->sign && wdata->bytes >=
3311 server->smbd_conn->rdma_readwrite_threshold) {
3313 struct smbd_buffer_descriptor_v1 *v1;
3314 bool need_invalidate = server->dialect == SMB30_PROT_ID;
3316 wdata->mr = smbd_register_mr(
3317 server->smbd_conn, wdata->pages,
3318 wdata->nr_pages, wdata->page_offset,
3319 wdata->tailsz, false, need_invalidate);
3322 goto async_writev_out;
3325 req->DataOffset = 0;
3326 if (wdata->nr_pages > 1)
3327 req->RemainingBytes =
3329 (wdata->nr_pages - 1) * wdata->pagesz -
3330 wdata->page_offset + wdata->tailsz
3333 req->RemainingBytes = cpu_to_le32(wdata->tailsz);
3334 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
3335 if (need_invalidate)
3336 req->Channel = SMB2_CHANNEL_RDMA_V1;
3337 req->WriteChannelInfoOffset =
3338 cpu_to_le16(offsetof(struct smb2_write_req, Buffer));
3339 req->WriteChannelInfoLength =
3340 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
3341 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
3342 v1->offset = cpu_to_le64(wdata->mr->mr->iova);
3343 v1->token = cpu_to_le32(wdata->mr->mr->rkey);
3344 v1->length = cpu_to_le32(wdata->mr->mr->length);
3347 iov[0].iov_len = total_len - 1;
3348 iov[0].iov_base = (char *)req;
3352 rqst.rq_pages = wdata->pages;
3353 rqst.rq_offset = wdata->page_offset;
3354 rqst.rq_npages = wdata->nr_pages;
3355 rqst.rq_pagesz = wdata->pagesz;
3356 rqst.rq_tailsz = wdata->tailsz;
3357 #ifdef CONFIG_CIFS_SMB_DIRECT
3359 iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1);
3363 cifs_dbg(FYI, "async write at %llu %u bytes\n",
3364 wdata->offset, wdata->bytes);
3366 #ifdef CONFIG_CIFS_SMB_DIRECT
3367 /* For RDMA read, I/O size is in RemainingBytes not in Length */
3369 req->Length = cpu_to_le32(wdata->bytes);
3371 req->Length = cpu_to_le32(wdata->bytes);
3374 if (wdata->credits) {
3375 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
3376 SMB2_MAX_BUFFER_SIZE));
3377 shdr->CreditRequest = shdr->CreditCharge;
3378 spin_lock(&server->req_lock);
3379 server->credits += wdata->credits -
3380 le16_to_cpu(shdr->CreditCharge);
3381 spin_unlock(&server->req_lock);
3382 wake_up(&server->request_q);
3383 flags |= CIFS_HAS_CREDITS;
3386 kref_get(&wdata->refcount);
3387 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
3391 trace_smb3_write_err(0 /* no xid */, req->PersistentFileId,
3392 tcon->tid, tcon->ses->Suid, wdata->offset,
3394 kref_put(&wdata->refcount, release);
3395 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
3397 trace_smb3_write_done(0 /* no xid */, req->PersistentFileId,
3398 tcon->tid, tcon->ses->Suid, wdata->offset,
3402 cifs_small_buf_release(req);
3407 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
3408 * The length field from io_parms must be at least 1 and indicates a number of
3409 * elements with data to write that begins with position 1 in iov array. All
3410 * data length is specified by count.
3413 SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
3414 unsigned int *nbytes, struct kvec *iov, int n_vec)
3416 struct smb_rqst rqst;
3418 struct smb2_write_req *req = NULL;
3419 struct smb2_write_rsp *rsp = NULL;
3421 struct kvec rsp_iov;
3423 unsigned int total_len;
3430 rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, (void **) &req,
3435 if (io_parms->tcon->ses->server == NULL)
3436 return -ECONNABORTED;
3438 if (smb3_encryption_required(io_parms->tcon))
3439 flags |= CIFS_TRANSFORM_REQ;
3441 req->sync_hdr.ProcessId = cpu_to_le32(io_parms->pid);
3443 req->PersistentFileId = io_parms->persistent_fid;
3444 req->VolatileFileId = io_parms->volatile_fid;
3445 req->WriteChannelInfoOffset = 0;
3446 req->WriteChannelInfoLength = 0;
3448 req->Length = cpu_to_le32(io_parms->length);
3449 req->Offset = cpu_to_le64(io_parms->offset);
3450 req->DataOffset = cpu_to_le16(
3451 offsetof(struct smb2_write_req, Buffer));
3452 req->RemainingBytes = 0;
3454 iov[0].iov_base = (char *)req;
3456 iov[0].iov_len = total_len - 1;
3458 memset(&rqst, 0, sizeof(struct smb_rqst));
3460 rqst.rq_nvec = n_vec + 1;
3462 rc = cifs_send_recv(xid, io_parms->tcon->ses, &rqst,
3463 &resp_buftype, flags, &rsp_iov);
3464 cifs_small_buf_release(req);
3465 rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
3468 trace_smb3_write_err(xid, req->PersistentFileId,
3469 io_parms->tcon->tid,
3470 io_parms->tcon->ses->Suid,
3471 io_parms->offset, io_parms->length, rc);
3472 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
3473 cifs_dbg(VFS, "Send error in write = %d\n", rc);
3475 *nbytes = le32_to_cpu(rsp->DataLength);
3476 trace_smb3_write_done(xid, req->PersistentFileId,
3477 io_parms->tcon->tid,
3478 io_parms->tcon->ses->Suid,
3479 io_parms->offset, *nbytes);
3482 free_rsp_buf(resp_buftype, rsp);
3487 num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
3490 unsigned int entrycount = 0;
3491 unsigned int next_offset = 0;
3492 FILE_DIRECTORY_INFO *entryptr;
3494 if (bufstart == NULL)
3497 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
3500 entryptr = (FILE_DIRECTORY_INFO *)
3501 ((char *)entryptr + next_offset);
3503 if ((char *)entryptr + size > end_of_buf) {
3504 cifs_dbg(VFS, "malformed search entry would overflow\n");
3508 len = le32_to_cpu(entryptr->FileNameLength);
3509 if ((char *)entryptr + len + size > end_of_buf) {
3510 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
3515 *lastentry = (char *)entryptr;
3518 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
3530 SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
3531 u64 persistent_fid, u64 volatile_fid, int index,
3532 struct cifs_search_info *srch_inf)
3534 struct smb_rqst rqst;
3535 struct smb2_query_directory_req *req;
3536 struct smb2_query_directory_rsp *rsp = NULL;
3538 struct kvec rsp_iov;
3541 int resp_buftype = CIFS_NO_BUFFER;
3542 unsigned char *bufptr;
3543 struct TCP_Server_Info *server;
3544 struct cifs_ses *ses = tcon->ses;
3545 __le16 asteriks = cpu_to_le16('*');
3547 unsigned int output_size = CIFSMaxBufSize;
3548 size_t info_buf_size;
3550 unsigned int total_len;
3552 if (ses && (ses->server))
3553 server = ses->server;
3557 rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req,
3562 if (smb3_encryption_required(tcon))
3563 flags |= CIFS_TRANSFORM_REQ;
3565 switch (srch_inf->info_level) {
3566 case SMB_FIND_FILE_DIRECTORY_INFO:
3567 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
3568 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
3570 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
3571 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
3572 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
3575 cifs_dbg(VFS, "info level %u isn't supported\n",
3576 srch_inf->info_level);
3581 req->FileIndex = cpu_to_le32(index);
3582 req->PersistentFileId = persistent_fid;
3583 req->VolatileFileId = volatile_fid;
3586 bufptr = req->Buffer;
3587 memcpy(bufptr, &asteriks, len);
3589 req->FileNameOffset =
3590 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1);
3591 req->FileNameLength = cpu_to_le16(len);
3593 * BB could be 30 bytes or so longer if we used SMB2 specific
3594 * buffer lengths, but this is safe and close enough.
3596 output_size = min_t(unsigned int, output_size, server->maxBuf);
3597 output_size = min_t(unsigned int, output_size, 2 << 15);
3598 req->OutputBufferLength = cpu_to_le32(output_size);
3600 iov[0].iov_base = (char *)req;
3602 iov[0].iov_len = total_len - 1;
3604 iov[1].iov_base = (char *)(req->Buffer);
3605 iov[1].iov_len = len;
3607 memset(&rqst, 0, sizeof(struct smb_rqst));
3611 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
3612 cifs_small_buf_release(req);
3613 rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
3616 if (rc == -ENODATA &&
3617 rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
3618 srch_inf->endOfSearch = true;
3621 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
3625 rc = validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
3626 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
3631 srch_inf->unicode = true;
3633 if (srch_inf->ntwrk_buf_start) {
3634 if (srch_inf->smallBuf)
3635 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
3637 cifs_buf_release(srch_inf->ntwrk_buf_start);
3639 srch_inf->ntwrk_buf_start = (char *)rsp;
3640 srch_inf->srch_entries_start = srch_inf->last_entry =
3641 (char *)rsp + le16_to_cpu(rsp->OutputBufferOffset);
3642 end_of_smb = rsp_iov.iov_len + (char *)rsp;
3643 srch_inf->entries_in_buffer =
3644 num_entries(srch_inf->srch_entries_start, end_of_smb,
3645 &srch_inf->last_entry, info_buf_size);
3646 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
3647 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
3648 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
3649 srch_inf->srch_entries_start, srch_inf->last_entry);
3650 if (resp_buftype == CIFS_LARGE_BUFFER)
3651 srch_inf->smallBuf = false;
3652 else if (resp_buftype == CIFS_SMALL_BUFFER)
3653 srch_inf->smallBuf = true;
3655 cifs_dbg(VFS, "illegal search buffer type\n");
3660 free_rsp_buf(resp_buftype, rsp);
3665 send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
3666 u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
3667 u8 info_type, u32 additional_info, unsigned int num,
3668 void **data, unsigned int *size)
3670 struct smb_rqst rqst;
3671 struct smb2_set_info_req *req;
3672 struct smb2_set_info_rsp *rsp = NULL;
3674 struct kvec rsp_iov;
3678 struct cifs_ses *ses = tcon->ses;
3680 unsigned int total_len;
3682 if (!ses || !(ses->server))
3688 iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL);
3692 rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, (void **) &req, &total_len);
3698 if (smb3_encryption_required(tcon))
3699 flags |= CIFS_TRANSFORM_REQ;
3701 req->sync_hdr.ProcessId = cpu_to_le32(pid);
3703 req->InfoType = info_type;
3704 req->FileInfoClass = info_class;
3705 req->PersistentFileId = persistent_fid;
3706 req->VolatileFileId = volatile_fid;
3707 req->AdditionalInformation = cpu_to_le32(additional_info);
3710 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1);
3711 req->BufferLength = cpu_to_le32(*size);
3713 memcpy(req->Buffer, *data, *size);
3716 iov[0].iov_base = (char *)req;
3718 iov[0].iov_len = total_len - 1;
3720 for (i = 1; i < num; i++) {
3721 le32_add_cpu(&req->BufferLength, size[i]);
3722 iov[i].iov_base = (char *)data[i];
3723 iov[i].iov_len = size[i];
3726 memset(&rqst, 0, sizeof(struct smb_rqst));
3730 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
3732 cifs_buf_release(req);
3733 rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
3736 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
3737 trace_smb3_set_info_err(xid, persistent_fid, tcon->tid,
3738 ses->Suid, info_class, (__u32)info_type, rc);
3741 free_rsp_buf(resp_buftype, rsp);
3747 SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
3748 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3750 struct smb2_file_rename_info info;
3752 unsigned int size[2];
3754 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3756 data = kmalloc_array(2, sizeof(void *), GFP_KERNEL);
3760 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
3761 /* 0 = fail if target already exists */
3762 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3763 info.FileNameLength = cpu_to_le32(len);
3766 size[0] = sizeof(struct smb2_file_rename_info);
3768 data[1] = target_file;
3769 size[1] = len + 2 /* null */;
3771 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
3772 current->tgid, FILE_RENAME_INFORMATION, SMB2_O_INFO_FILE,
3779 SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
3780 u64 persistent_fid, u64 volatile_fid)
3782 __u8 delete_pending = 1;
3786 data = &delete_pending;
3787 size = 1; /* sizeof __u8 */
3789 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3790 current->tgid, FILE_DISPOSITION_INFORMATION, SMB2_O_INFO_FILE,
3791 0, 1, &data, &size);
3795 SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
3796 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3798 struct smb2_file_link_info info;
3800 unsigned int size[2];
3802 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3804 data = kmalloc_array(2, sizeof(void *), GFP_KERNEL);
3808 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
3809 /* 0 = fail if link already exists */
3810 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3811 info.FileNameLength = cpu_to_le32(len);
3814 size[0] = sizeof(struct smb2_file_link_info);
3816 data[1] = target_file;
3817 size[1] = len + 2 /* null */;
3819 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
3820 current->tgid, FILE_LINK_INFORMATION, SMB2_O_INFO_FILE,
3827 SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
3828 u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc)
3830 struct smb2_file_eof_info info;
3834 info.EndOfFile = *eof;
3837 size = sizeof(struct smb2_file_eof_info);
3840 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3841 pid, FILE_ALLOCATION_INFORMATION, SMB2_O_INFO_FILE,
3842 0, 1, &data, &size);
3844 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3845 pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE,
3846 0, 1, &data, &size);
3850 SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
3851 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
3854 size = sizeof(FILE_BASIC_INFO);
3855 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3856 current->tgid, FILE_BASIC_INFORMATION, SMB2_O_INFO_FILE,
3857 0, 1, (void **)&buf, &size);
3861 SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
3862 u64 persistent_fid, u64 volatile_fid,
3863 struct cifs_ntsd *pnntsd, int pacllen, int aclflag)
3865 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3866 current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag,
3867 1, (void **)&pnntsd, &pacllen);
3871 SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
3872 u64 persistent_fid, u64 volatile_fid,
3873 struct smb2_file_full_ea_info *buf, int len)
3875 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3876 current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE,
3877 0, 1, (void **)&buf, &len);
3881 SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
3882 const u64 persistent_fid, const u64 volatile_fid,
3885 struct smb_rqst rqst;
3887 struct smb2_oplock_break *req = NULL;
3888 struct cifs_ses *ses = tcon->ses;
3889 int flags = CIFS_OBREAK_OP;
3890 unsigned int total_len;
3892 struct kvec rsp_iov;
3895 cifs_dbg(FYI, "SMB2_oplock_break\n");
3896 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
3901 if (smb3_encryption_required(tcon))
3902 flags |= CIFS_TRANSFORM_REQ;
3904 req->VolatileFid = volatile_fid;
3905 req->PersistentFid = persistent_fid;
3906 req->OplockLevel = oplock_level;
3907 req->sync_hdr.CreditRequest = cpu_to_le16(1);
3909 flags |= CIFS_NO_RESP;
3911 iov[0].iov_base = (char *)req;
3912 iov[0].iov_len = total_len;
3914 memset(&rqst, 0, sizeof(struct smb_rqst));
3918 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
3919 cifs_small_buf_release(req);
3922 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
3923 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
3930 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
3931 struct kstatfs *kst)
3933 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
3934 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
3935 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
3936 kst->f_bfree = kst->f_bavail =
3937 le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
3942 build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
3943 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
3945 struct TCP_Server_Info *server;
3947 struct smb2_query_info_req *req;
3948 unsigned int total_len;
3950 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
3952 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
3955 server = tcon->ses->server;
3957 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
3962 req->InfoType = SMB2_O_INFO_FILESYSTEM;
3963 req->FileInfoClass = level;
3964 req->PersistentFileId = persistent_fid;
3965 req->VolatileFileId = volatile_fid;
3967 req->InputBufferOffset =
3968 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1);
3969 req->OutputBufferLength = cpu_to_le32(
3970 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1);
3972 iov->iov_base = (char *)req;
3973 iov->iov_len = total_len;
3978 SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
3979 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
3981 struct smb_rqst rqst;
3982 struct smb2_query_info_rsp *rsp = NULL;
3984 struct kvec rsp_iov;
3987 struct cifs_ses *ses = tcon->ses;
3988 struct smb2_fs_full_size_info *info = NULL;
3991 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
3992 sizeof(struct smb2_fs_full_size_info),
3993 persistent_fid, volatile_fid);
3997 if (smb3_encryption_required(tcon))
3998 flags |= CIFS_TRANSFORM_REQ;
4000 memset(&rqst, 0, sizeof(struct smb_rqst));
4004 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
4005 cifs_small_buf_release(iov.iov_base);
4007 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
4010 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
4012 info = (struct smb2_fs_full_size_info *)(
4013 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
4014 rc = validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
4015 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
4016 sizeof(struct smb2_fs_full_size_info));
4018 copy_fs_info_to_kstatfs(info, fsdata);
4021 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
4026 SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
4027 u64 persistent_fid, u64 volatile_fid, int level)
4029 struct smb_rqst rqst;
4030 struct smb2_query_info_rsp *rsp = NULL;
4032 struct kvec rsp_iov;
4034 int resp_buftype, max_len, min_len;
4035 struct cifs_ses *ses = tcon->ses;
4036 unsigned int rsp_len, offset;
4039 if (level == FS_DEVICE_INFORMATION) {
4040 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
4041 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
4042 } else if (level == FS_ATTRIBUTE_INFORMATION) {
4043 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
4044 min_len = MIN_FS_ATTR_INFO_SIZE;
4045 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
4046 max_len = sizeof(struct smb3_fs_ss_info);
4047 min_len = sizeof(struct smb3_fs_ss_info);
4048 } else if (level == FS_VOLUME_INFORMATION) {
4049 max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN;
4050 min_len = sizeof(struct smb3_fs_vol_info);
4052 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
4056 rc = build_qfs_info_req(&iov, tcon, level, max_len,
4057 persistent_fid, volatile_fid);
4061 if (smb3_encryption_required(tcon))
4062 flags |= CIFS_TRANSFORM_REQ;
4064 memset(&rqst, 0, sizeof(struct smb_rqst));
4068 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
4069 cifs_small_buf_release(iov.iov_base);
4071 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
4074 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
4076 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
4077 offset = le16_to_cpu(rsp->OutputBufferOffset);
4078 rc = validate_iov(offset, rsp_len, &rsp_iov, min_len);
4082 if (level == FS_ATTRIBUTE_INFORMATION)
4083 memcpy(&tcon->fsAttrInfo, offset
4084 + (char *)rsp, min_t(unsigned int,
4086 else if (level == FS_DEVICE_INFORMATION)
4087 memcpy(&tcon->fsDevInfo, offset
4088 + (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO));
4089 else if (level == FS_SECTOR_SIZE_INFORMATION) {
4090 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
4091 (offset + (char *)rsp);
4092 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
4093 tcon->perf_sector_size =
4094 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
4095 } else if (level == FS_VOLUME_INFORMATION) {
4096 struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *)
4097 (offset + (char *)rsp);
4098 tcon->vol_serial_number = vol_info->VolumeSerialNumber;
4099 tcon->vol_create_time = vol_info->VolumeCreationTime;
4103 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
4108 smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
4109 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
4110 const __u32 num_lock, struct smb2_lock_element *buf)
4112 struct smb_rqst rqst;
4114 struct smb2_lock_req *req = NULL;
4116 struct kvec rsp_iov;
4119 int flags = CIFS_NO_RESP;
4120 unsigned int total_len;
4122 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
4124 rc = smb2_plain_req_init(SMB2_LOCK, tcon, (void **) &req, &total_len);
4128 if (smb3_encryption_required(tcon))
4129 flags |= CIFS_TRANSFORM_REQ;
4131 req->sync_hdr.ProcessId = cpu_to_le32(pid);
4132 req->LockCount = cpu_to_le16(num_lock);
4134 req->PersistentFileId = persist_fid;
4135 req->VolatileFileId = volatile_fid;
4137 count = num_lock * sizeof(struct smb2_lock_element);
4139 iov[0].iov_base = (char *)req;
4140 iov[0].iov_len = total_len - sizeof(struct smb2_lock_element);
4141 iov[1].iov_base = (char *)buf;
4142 iov[1].iov_len = count;
4144 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
4146 memset(&rqst, 0, sizeof(struct smb_rqst));
4150 rc = cifs_send_recv(xid, tcon->ses, &rqst, &resp_buf_type, flags,
4152 cifs_small_buf_release(req);
4154 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
4155 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
4156 trace_smb3_lock_err(xid, persist_fid, tcon->tid,
4157 tcon->ses->Suid, rc);
4164 SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
4165 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
4166 const __u64 length, const __u64 offset, const __u32 lock_flags,
4169 struct smb2_lock_element lock;
4171 lock.Offset = cpu_to_le64(offset);
4172 lock.Length = cpu_to_le64(length);
4173 lock.Flags = cpu_to_le32(lock_flags);
4174 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
4175 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
4177 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
4181 SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
4182 __u8 *lease_key, const __le32 lease_state)
4184 struct smb_rqst rqst;
4186 struct smb2_lease_ack *req = NULL;
4187 struct cifs_ses *ses = tcon->ses;
4188 int flags = CIFS_OBREAK_OP;
4189 unsigned int total_len;
4191 struct kvec rsp_iov;
4194 cifs_dbg(FYI, "SMB2_lease_break\n");
4195 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
4200 if (smb3_encryption_required(tcon))
4201 flags |= CIFS_TRANSFORM_REQ;
4203 req->sync_hdr.CreditRequest = cpu_to_le16(1);
4204 req->StructureSize = cpu_to_le16(36);
4207 memcpy(req->LeaseKey, lease_key, 16);
4208 req->LeaseState = lease_state;
4210 flags |= CIFS_NO_RESP;
4212 iov[0].iov_base = (char *)req;
4213 iov[0].iov_len = total_len;
4215 memset(&rqst, 0, sizeof(struct smb_rqst));
4219 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
4220 cifs_small_buf_release(req);
4223 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
4224 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);