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;
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 *path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1951 cifs_dbg(FYI, "mkdir\n");
1953 if (ses && (ses->server))
1954 server = ses->server;
1958 rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
1963 if (smb3_encryption_required(tcon))
1964 flags |= CIFS_TRANSFORM_REQ;
1967 req->ImpersonationLevel = IL_IMPERSONATION;
1968 req->DesiredAccess = cpu_to_le32(FILE_WRITE_ATTRIBUTES);
1969 /* File attributes ignored on open (used in create though) */
1970 req->FileAttributes = cpu_to_le32(file_attributes);
1971 req->ShareAccess = FILE_SHARE_ALL_LE;
1972 req->CreateDisposition = cpu_to_le32(FILE_CREATE);
1973 req->CreateOptions = cpu_to_le32(CREATE_NOT_FILE);
1975 iov[0].iov_base = (char *)req;
1976 /* -1 since last byte is buf[0] which is sent below (path) */
1977 iov[0].iov_len = total_len - 1;
1979 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
1981 /* [MS-SMB2] 2.2.13 NameOffset:
1982 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
1983 * the SMB2 header, the file name includes a prefix that will
1984 * be processed during DFS name normalization as specified in
1985 * section 3.3.5.9. Otherwise, the file name is relative to
1986 * the share that is identified by the TreeId in the SMB2
1989 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
1992 req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
1993 rc = alloc_path_with_tree_prefix(©_path, ©_size,
1995 tcon->treeName, path);
1997 cifs_small_buf_release(req);
2000 req->NameLength = cpu_to_le16(name_len * 2);
2001 uni_path_len = copy_size;
2004 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
2005 /* MUST set path len (NameLength) to 0 opening root of share */
2006 req->NameLength = cpu_to_le16(uni_path_len - 2);
2007 if (uni_path_len % 8 != 0) {
2008 copy_size = roundup(uni_path_len, 8);
2009 copy_path = kzalloc(copy_size, GFP_KERNEL);
2011 cifs_small_buf_release(req);
2014 memcpy((char *)copy_path, (const char *)path,
2016 uni_path_len = copy_size;
2021 iov[1].iov_len = uni_path_len;
2022 iov[1].iov_base = path;
2023 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2025 if (tcon->posix_extensions) {
2027 struct create_context *ccontext =
2028 (struct create_context *)iov[n_iov-1].iov_base;
2030 cpu_to_le32(iov[n_iov-1].iov_len);
2033 rc = add_posix_context(iov, &n_iov, mode);
2035 cifs_small_buf_release(req);
2039 pc_buf = iov[n_iov-1].iov_base;
2043 memset(&rqst, 0, sizeof(struct smb_rqst));
2045 rqst.rq_nvec = n_iov;
2047 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
2050 cifs_small_buf_release(req);
2051 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2054 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
2055 trace_smb3_posix_mkdir_err(xid, tcon->tid, ses->Suid,
2056 CREATE_NOT_FILE, FILE_WRITE_ATTRIBUTES, rc);
2057 goto smb311_mkdir_exit;
2059 trace_smb3_posix_mkdir_done(xid, rsp->PersistentFileId, tcon->tid,
2060 ses->Suid, CREATE_NOT_FILE,
2061 FILE_WRITE_ATTRIBUTES);
2063 SMB2_close(xid, tcon, rsp->PersistentFileId, rsp->VolatileFileId);
2065 /* Eventually save off posix specific response info and timestaps */
2070 free_rsp_buf(resp_buftype, rsp);
2077 SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
2078 __u8 *oplock, struct smb2_file_all_info *buf,
2079 struct kvec *err_iov, int *buftype)
2081 struct smb_rqst rqst;
2082 struct smb2_create_req *req;
2083 struct smb2_create_rsp *rsp;
2084 struct TCP_Server_Info *server;
2085 struct cifs_tcon *tcon = oparms->tcon;
2086 struct cifs_ses *ses = tcon->ses;
2087 struct kvec iov[5]; /* make sure at least one for each open context */
2088 struct kvec rsp_iov = {NULL, 0};
2091 __le16 *copy_path = NULL;
2094 unsigned int n_iov = 2;
2095 __u32 file_attributes = 0;
2096 char *dhc_buf = NULL, *lc_buf = NULL, *pc_buf = NULL;
2098 unsigned int total_len;
2100 cifs_dbg(FYI, "create/open\n");
2102 if (ses && (ses->server))
2103 server = ses->server;
2107 rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
2112 if (smb3_encryption_required(tcon))
2113 flags |= CIFS_TRANSFORM_REQ;
2115 if (oparms->create_options & CREATE_OPTION_READONLY)
2116 file_attributes |= ATTR_READONLY;
2117 if (oparms->create_options & CREATE_OPTION_SPECIAL)
2118 file_attributes |= ATTR_SYSTEM;
2120 req->ImpersonationLevel = IL_IMPERSONATION;
2121 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
2122 /* File attributes ignored on open (used in create though) */
2123 req->FileAttributes = cpu_to_le32(file_attributes);
2124 req->ShareAccess = FILE_SHARE_ALL_LE;
2125 req->CreateDisposition = cpu_to_le32(oparms->disposition);
2126 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
2128 iov[0].iov_base = (char *)req;
2129 /* -1 since last byte is buf[0] which is sent below (path) */
2130 iov[0].iov_len = total_len - 1;
2132 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
2134 /* [MS-SMB2] 2.2.13 NameOffset:
2135 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2136 * the SMB2 header, the file name includes a prefix that will
2137 * be processed during DFS name normalization as specified in
2138 * section 3.3.5.9. Otherwise, the file name is relative to
2139 * the share that is identified by the TreeId in the SMB2
2142 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
2145 req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
2146 rc = alloc_path_with_tree_prefix(©_path, ©_size,
2148 tcon->treeName, path);
2150 cifs_small_buf_release(req);
2153 req->NameLength = cpu_to_le16(name_len * 2);
2154 uni_path_len = copy_size;
2157 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
2158 /* MUST set path len (NameLength) to 0 opening root of share */
2159 req->NameLength = cpu_to_le16(uni_path_len - 2);
2160 if (uni_path_len % 8 != 0) {
2161 copy_size = roundup(uni_path_len, 8);
2162 copy_path = kzalloc(copy_size, GFP_KERNEL);
2164 cifs_small_buf_release(req);
2167 memcpy((char *)copy_path, (const char *)path,
2169 uni_path_len = copy_size;
2174 iov[1].iov_len = uni_path_len;
2175 iov[1].iov_base = path;
2177 if (!server->oplocks)
2178 *oplock = SMB2_OPLOCK_LEVEL_NONE;
2180 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
2181 *oplock == SMB2_OPLOCK_LEVEL_NONE)
2182 req->RequestedOplockLevel = *oplock;
2184 rc = add_lease_context(server, iov, &n_iov,
2185 oparms->fid->lease_key, oplock);
2187 cifs_small_buf_release(req);
2191 lc_buf = iov[n_iov-1].iov_base;
2194 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
2195 /* need to set Next field of lease context if we request it */
2196 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
2197 struct create_context *ccontext =
2198 (struct create_context *)iov[n_iov-1].iov_base;
2200 cpu_to_le32(server->vals->create_lease_size);
2203 rc = add_durable_context(iov, &n_iov, oparms,
2204 tcon->use_persistent);
2206 cifs_small_buf_release(req);
2211 dhc_buf = iov[n_iov-1].iov_base;
2214 #ifdef CONFIG_CIFS_SMB311
2215 if (tcon->posix_extensions) {
2217 struct create_context *ccontext =
2218 (struct create_context *)iov[n_iov-1].iov_base;
2220 cpu_to_le32(iov[n_iov-1].iov_len);
2223 rc = add_posix_context(iov, &n_iov, oparms->mode);
2225 cifs_small_buf_release(req);
2231 pc_buf = iov[n_iov-1].iov_base;
2235 memset(&rqst, 0, sizeof(struct smb_rqst));
2237 rqst.rq_nvec = n_iov;
2239 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
2241 cifs_small_buf_release(req);
2242 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2245 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
2246 if (err_iov && rsp) {
2248 *buftype = resp_buftype;
2249 resp_buftype = CIFS_NO_BUFFER;
2252 trace_smb3_open_err(xid, tcon->tid, ses->Suid,
2253 oparms->create_options, oparms->desired_access, rc);
2256 trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid,
2257 ses->Suid, oparms->create_options,
2258 oparms->desired_access);
2260 oparms->fid->persistent_fid = rsp->PersistentFileId;
2261 oparms->fid->volatile_fid = rsp->VolatileFileId;
2264 memcpy(buf, &rsp->CreationTime, 32);
2265 buf->AllocationSize = rsp->AllocationSize;
2266 buf->EndOfFile = rsp->EndofFile;
2267 buf->Attributes = rsp->FileAttributes;
2268 buf->NumberOfLinks = cpu_to_le32(1);
2269 buf->DeletePending = 0;
2272 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
2273 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch,
2274 oparms->fid->lease_key);
2276 *oplock = rsp->OplockLevel;
2282 free_rsp_buf(resp_buftype, rsp);
2287 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
2290 SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2291 u64 volatile_fid, u32 opcode, bool is_fsctl,
2292 char *in_data, u32 indatalen,
2293 char **out_data, u32 *plen /* returned data len */)
2295 struct smb_rqst rqst;
2296 struct smb2_ioctl_req *req;
2297 struct smb2_ioctl_rsp *rsp;
2298 struct cifs_ses *ses;
2300 struct kvec rsp_iov;
2305 unsigned int total_len;
2307 cifs_dbg(FYI, "SMB2 IOCTL\n");
2309 if (out_data != NULL)
2312 /* zero out returned data len, in case of error */
2321 if (!ses || !(ses->server))
2324 rc = smb2_plain_req_init(SMB2_IOCTL, tcon, (void **) &req, &total_len);
2328 if (smb3_encryption_required(tcon))
2329 flags |= CIFS_TRANSFORM_REQ;
2331 req->CtlCode = cpu_to_le32(opcode);
2332 req->PersistentFileId = persistent_fid;
2333 req->VolatileFileId = volatile_fid;
2336 req->InputCount = cpu_to_le32(indatalen);
2337 /* do not set InputOffset if no input data */
2339 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer));
2340 iov[1].iov_base = in_data;
2341 iov[1].iov_len = indatalen;
2346 req->OutputOffset = 0;
2347 req->OutputCount = 0; /* MBZ */
2350 * Could increase MaxOutputResponse, but that would require more
2351 * than one credit. Windows typically sets this smaller, but for some
2352 * ioctls it may be useful to allow server to send more. No point
2353 * limiting what the server can send as long as fits in one credit
2354 * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE
2355 * (by default, note that it can be overridden to make max larger)
2356 * in responses (except for read responses which can be bigger.
2357 * We may want to bump this limit up
2359 req->MaxOutputResponse = cpu_to_le32(CIFSMaxBufSize);
2362 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
2366 iov[0].iov_base = (char *)req;
2369 * If no input data, the size of ioctl struct in
2370 * protocol spec still includes a 1 byte data buffer,
2371 * but if input data passed to ioctl, we do not
2372 * want to double count this, so we do not send
2373 * the dummy one byte of data in iovec[0] if sending
2374 * input data (in iovec[1]).
2378 iov[0].iov_len = total_len - 1;
2380 iov[0].iov_len = total_len;
2382 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
2383 if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO)
2384 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
2386 memset(&rqst, 0, sizeof(struct smb_rqst));
2388 rqst.rq_nvec = n_iov;
2390 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
2392 cifs_small_buf_release(req);
2393 rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
2396 trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid,
2397 ses->Suid, 0, opcode, rc);
2399 if ((rc != 0) && (rc != -EINVAL)) {
2400 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
2402 } else if (rc == -EINVAL) {
2403 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
2404 (opcode != FSCTL_SRV_COPYCHUNK)) {
2405 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
2410 /* check if caller wants to look at return data or just return rc */
2411 if ((plen == NULL) || (out_data == NULL))
2414 *plen = le32_to_cpu(rsp->OutputCount);
2416 /* We check for obvious errors in the output buffer length and offset */
2418 goto ioctl_exit; /* server returned no data */
2419 else if (*plen > 0xFF00) {
2420 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
2426 if (rsp_iov.iov_len < le32_to_cpu(rsp->OutputOffset) + *plen) {
2427 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
2428 le32_to_cpu(rsp->OutputOffset));
2434 *out_data = kmalloc(*plen, GFP_KERNEL);
2435 if (*out_data == NULL) {
2440 memcpy(*out_data, (char *)rsp + le32_to_cpu(rsp->OutputOffset), *plen);
2442 free_rsp_buf(resp_buftype, rsp);
2447 * Individual callers to ioctl worker function follow
2451 SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2452 u64 persistent_fid, u64 volatile_fid)
2455 struct compress_ioctl fsctl_input;
2456 char *ret_data = NULL;
2458 fsctl_input.CompressionState =
2459 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
2461 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
2462 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
2463 (char *)&fsctl_input /* data input */,
2464 2 /* in data len */, &ret_data /* out data */, NULL);
2466 cifs_dbg(FYI, "set compression rc %d\n", rc);
2472 SMB2_close_flags(const unsigned int xid, struct cifs_tcon *tcon,
2473 u64 persistent_fid, u64 volatile_fid, int flags)
2475 struct smb_rqst rqst;
2476 struct smb2_close_req *req;
2477 struct smb2_close_rsp *rsp;
2478 struct cifs_ses *ses = tcon->ses;
2480 struct kvec rsp_iov;
2483 unsigned int total_len;
2485 cifs_dbg(FYI, "Close\n");
2487 if (!ses || !(ses->server))
2490 rc = smb2_plain_req_init(SMB2_CLOSE, tcon, (void **) &req, &total_len);
2494 if (smb3_encryption_required(tcon))
2495 flags |= CIFS_TRANSFORM_REQ;
2497 req->PersistentFileId = persistent_fid;
2498 req->VolatileFileId = volatile_fid;
2500 iov[0].iov_base = (char *)req;
2501 iov[0].iov_len = total_len;
2503 memset(&rqst, 0, sizeof(struct smb_rqst));
2507 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
2508 cifs_small_buf_release(req);
2509 rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
2512 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
2513 trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid,
2518 /* BB FIXME - decode close response, update inode for caching */
2521 free_rsp_buf(resp_buftype, rsp);
2526 SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
2527 u64 persistent_fid, u64 volatile_fid)
2529 return SMB2_close_flags(xid, tcon, persistent_fid, volatile_fid, 0);
2533 validate_iov(unsigned int offset, unsigned int buffer_length,
2534 struct kvec *iov, unsigned int min_buf_size)
2536 unsigned int smb_len = iov->iov_len;
2537 char *end_of_smb = smb_len + (char *)iov->iov_base;
2538 char *begin_of_buf = offset + (char *)iov->iov_base;
2539 char *end_of_buf = begin_of_buf + buffer_length;
2542 if (buffer_length < min_buf_size) {
2543 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
2544 buffer_length, min_buf_size);
2548 /* check if beyond RFC1001 maximum length */
2549 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
2550 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
2551 buffer_length, smb_len);
2555 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
2556 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
2564 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2565 * Caller must free buffer.
2568 validate_and_copy_iov(unsigned int offset, unsigned int buffer_length,
2569 struct kvec *iov, unsigned int minbufsize,
2572 char *begin_of_buf = offset + (char *)iov->iov_base;
2578 rc = validate_iov(offset, buffer_length, iov, minbufsize);
2582 memcpy(data, begin_of_buf, buffer_length);
2588 query_info(const unsigned int xid, struct cifs_tcon *tcon,
2589 u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
2590 u32 additional_info, size_t output_len, size_t min_len, void **data,
2593 struct smb_rqst rqst;
2594 struct smb2_query_info_req *req;
2595 struct smb2_query_info_rsp *rsp = NULL;
2597 struct kvec rsp_iov;
2600 struct cifs_ses *ses = tcon->ses;
2602 unsigned int total_len;
2604 cifs_dbg(FYI, "Query Info\n");
2606 if (!ses || !(ses->server))
2609 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
2614 if (smb3_encryption_required(tcon))
2615 flags |= CIFS_TRANSFORM_REQ;
2617 req->InfoType = info_type;
2618 req->FileInfoClass = info_class;
2619 req->PersistentFileId = persistent_fid;
2620 req->VolatileFileId = volatile_fid;
2621 req->AdditionalInformation = cpu_to_le32(additional_info);
2624 * We do not use the input buffer (do not send extra byte)
2626 req->InputBufferOffset = 0;
2628 req->OutputBufferLength = cpu_to_le32(output_len);
2630 iov[0].iov_base = (char *)req;
2632 iov[0].iov_len = total_len - 1;
2634 memset(&rqst, 0, sizeof(struct smb_rqst));
2638 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
2639 cifs_small_buf_release(req);
2640 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2643 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2644 trace_smb3_query_info_err(xid, persistent_fid, tcon->tid,
2645 ses->Suid, info_class, (__u32)info_type, rc);
2650 *dlen = le32_to_cpu(rsp->OutputBufferLength);
2652 *data = kmalloc(*dlen, GFP_KERNEL);
2655 "Error %d allocating memory for acl\n",
2663 rc = validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset),
2664 le32_to_cpu(rsp->OutputBufferLength),
2665 &rsp_iov, min_len, *data);
2668 free_rsp_buf(resp_buftype, rsp);
2672 int SMB2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
2673 u64 persistent_fid, u64 volatile_fid,
2674 int ea_buf_size, struct smb2_file_full_ea_info *data)
2676 return query_info(xid, tcon, persistent_fid, volatile_fid,
2677 FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, 0,
2679 sizeof(struct smb2_file_full_ea_info),
2684 int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
2685 u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data)
2687 return query_info(xid, tcon, persistent_fid, volatile_fid,
2688 FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0,
2689 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
2690 sizeof(struct smb2_file_all_info), (void **)&data,
2695 SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
2696 u64 persistent_fid, u64 volatile_fid,
2697 void **data, u32 *plen)
2699 __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO;
2702 return query_info(xid, tcon, persistent_fid, volatile_fid,
2703 0, SMB2_O_INFO_SECURITY, additional_info,
2704 SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen);
2708 SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
2709 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
2711 return query_info(xid, tcon, persistent_fid, volatile_fid,
2712 FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0,
2713 sizeof(struct smb2_file_internal_info),
2714 sizeof(struct smb2_file_internal_info),
2715 (void **)&uniqueid, NULL);
2719 * This is a no-op for now. We're not really interested in the reply, but
2720 * rather in the fact that the server sent one and that server->lstrp
2723 * FIXME: maybe we should consider checking that the reply matches request?
2726 smb2_echo_callback(struct mid_q_entry *mid)
2728 struct TCP_Server_Info *server = mid->callback_data;
2729 struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
2730 unsigned int credits_received = 1;
2732 if (mid->mid_state == MID_RESPONSE_RECEIVED)
2733 credits_received = le16_to_cpu(rsp->sync_hdr.CreditRequest);
2735 DeleteMidQEntry(mid);
2736 add_credits(server, credits_received, CIFS_ECHO_OP);
2739 void smb2_reconnect_server(struct work_struct *work)
2741 struct TCP_Server_Info *server = container_of(work,
2742 struct TCP_Server_Info, reconnect.work);
2743 struct cifs_ses *ses;
2744 struct cifs_tcon *tcon, *tcon2;
2745 struct list_head tmp_list;
2746 int tcon_exist = false;
2748 int resched = false;
2751 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2752 mutex_lock(&server->reconnect_mutex);
2754 INIT_LIST_HEAD(&tmp_list);
2755 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
2757 spin_lock(&cifs_tcp_ses_lock);
2758 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2759 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2760 if (tcon->need_reconnect || tcon->need_reopen_files) {
2762 list_add_tail(&tcon->rlist, &tmp_list);
2766 if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) {
2767 list_add_tail(&ses->tcon_ipc->rlist, &tmp_list);
2772 * Get the reference to server struct to be sure that the last call of
2773 * cifs_put_tcon() in the loop below won't release the server pointer.
2776 server->srv_count++;
2778 spin_unlock(&cifs_tcp_ses_lock);
2780 list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
2781 rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon);
2783 cifs_reopen_persistent_handles(tcon);
2786 list_del_init(&tcon->rlist);
2787 cifs_put_tcon(tcon);
2790 cifs_dbg(FYI, "Reconnecting tcons finished\n");
2792 queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
2793 mutex_unlock(&server->reconnect_mutex);
2795 /* now we can safely release srv struct */
2797 cifs_put_tcp_session(server, 1);
2801 SMB2_echo(struct TCP_Server_Info *server)
2803 struct smb2_echo_req *req;
2806 struct smb_rqst rqst = { .rq_iov = iov,
2808 unsigned int total_len;
2810 cifs_dbg(FYI, "In echo request\n");
2812 if (server->tcpStatus == CifsNeedNegotiate) {
2813 /* No need to send echo on newly established connections */
2814 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
2818 rc = smb2_plain_req_init(SMB2_ECHO, NULL, (void **)&req, &total_len);
2822 req->sync_hdr.CreditRequest = cpu_to_le16(1);
2824 iov[0].iov_len = total_len;
2825 iov[0].iov_base = (char *)req;
2827 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
2828 server, CIFS_ECHO_OP);
2830 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
2832 cifs_small_buf_release(req);
2837 SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2840 struct smb_rqst rqst;
2841 struct smb2_flush_req *req;
2842 struct cifs_ses *ses = tcon->ses;
2844 struct kvec rsp_iov;
2848 unsigned int total_len;
2850 cifs_dbg(FYI, "Flush\n");
2852 if (!ses || !(ses->server))
2855 rc = smb2_plain_req_init(SMB2_FLUSH, tcon, (void **) &req, &total_len);
2859 if (smb3_encryption_required(tcon))
2860 flags |= CIFS_TRANSFORM_REQ;
2862 req->PersistentFileId = persistent_fid;
2863 req->VolatileFileId = volatile_fid;
2865 iov[0].iov_base = (char *)req;
2866 iov[0].iov_len = total_len;
2868 memset(&rqst, 0, sizeof(struct smb_rqst));
2872 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
2873 cifs_small_buf_release(req);
2876 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
2877 trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid,
2881 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
2886 * To form a chain of read requests, any read requests after the first should
2887 * have the end_of_chain boolean set to true.
2890 smb2_new_read_req(void **buf, unsigned int *total_len,
2891 struct cifs_io_parms *io_parms, struct cifs_readdata *rdata,
2892 unsigned int remaining_bytes, int request_type)
2895 struct smb2_read_plain_req *req = NULL;
2896 struct smb2_sync_hdr *shdr;
2897 struct TCP_Server_Info *server;
2899 rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
2904 server = io_parms->tcon->ses->server;
2906 return -ECONNABORTED;
2908 shdr = &req->sync_hdr;
2909 shdr->ProcessId = cpu_to_le32(io_parms->pid);
2911 req->PersistentFileId = io_parms->persistent_fid;
2912 req->VolatileFileId = io_parms->volatile_fid;
2913 req->ReadChannelInfoOffset = 0; /* reserved */
2914 req->ReadChannelInfoLength = 0; /* reserved */
2915 req->Channel = 0; /* reserved */
2916 req->MinimumCount = 0;
2917 req->Length = cpu_to_le32(io_parms->length);
2918 req->Offset = cpu_to_le64(io_parms->offset);
2919 #ifdef CONFIG_CIFS_SMB_DIRECT
2921 * If we want to do a RDMA write, fill in and append
2922 * smbd_buffer_descriptor_v1 to the end of read request
2924 if (server->rdma && rdata && !server->sign &&
2925 rdata->bytes >= server->smbd_conn->rdma_readwrite_threshold) {
2927 struct smbd_buffer_descriptor_v1 *v1;
2928 bool need_invalidate =
2929 io_parms->tcon->ses->server->dialect == SMB30_PROT_ID;
2931 rdata->mr = smbd_register_mr(
2932 server->smbd_conn, rdata->pages,
2933 rdata->nr_pages, rdata->page_offset,
2934 rdata->tailsz, true, need_invalidate);
2938 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
2939 if (need_invalidate)
2940 req->Channel = SMB2_CHANNEL_RDMA_V1;
2941 req->ReadChannelInfoOffset =
2942 cpu_to_le16(offsetof(struct smb2_read_plain_req, Buffer));
2943 req->ReadChannelInfoLength =
2944 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
2945 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
2946 v1->offset = cpu_to_le64(rdata->mr->mr->iova);
2947 v1->token = cpu_to_le32(rdata->mr->mr->rkey);
2948 v1->length = cpu_to_le32(rdata->mr->mr->length);
2950 *total_len += sizeof(*v1) - 1;
2953 if (request_type & CHAINED_REQUEST) {
2954 if (!(request_type & END_OF_CHAIN)) {
2955 /* next 8-byte aligned request */
2956 *total_len = DIV_ROUND_UP(*total_len, 8) * 8;
2957 shdr->NextCommand = cpu_to_le32(*total_len);
2958 } else /* END_OF_CHAIN */
2959 shdr->NextCommand = 0;
2960 if (request_type & RELATED_REQUEST) {
2961 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2963 * Related requests use info from previous read request
2966 shdr->SessionId = 0xFFFFFFFF;
2967 shdr->TreeId = 0xFFFFFFFF;
2968 req->PersistentFileId = 0xFFFFFFFF;
2969 req->VolatileFileId = 0xFFFFFFFF;
2972 if (remaining_bytes > io_parms->length)
2973 req->RemainingBytes = cpu_to_le32(remaining_bytes);
2975 req->RemainingBytes = 0;
2982 smb2_readv_callback(struct mid_q_entry *mid)
2984 struct cifs_readdata *rdata = mid->callback_data;
2985 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
2986 struct TCP_Server_Info *server = tcon->ses->server;
2987 struct smb2_sync_hdr *shdr =
2988 (struct smb2_sync_hdr *)rdata->iov[0].iov_base;
2989 unsigned int credits_received = 1;
2990 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2992 .rq_pages = rdata->pages,
2993 .rq_offset = rdata->page_offset,
2994 .rq_npages = rdata->nr_pages,
2995 .rq_pagesz = rdata->pagesz,
2996 .rq_tailsz = rdata->tailsz };
2998 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2999 __func__, mid->mid, mid->mid_state, rdata->result,
3002 switch (mid->mid_state) {
3003 case MID_RESPONSE_RECEIVED:
3004 credits_received = le16_to_cpu(shdr->CreditRequest);
3005 /* result already set, check signature */
3006 if (server->sign && !mid->decrypted) {
3009 rc = smb2_verify_signature(&rqst, server);
3011 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
3014 /* FIXME: should this be counted toward the initiating task? */
3015 task_io_account_read(rdata->got_bytes);
3016 cifs_stats_bytes_read(tcon, rdata->got_bytes);
3018 case MID_REQUEST_SUBMITTED:
3019 case MID_RETRY_NEEDED:
3020 rdata->result = -EAGAIN;
3021 if (server->sign && rdata->got_bytes)
3022 /* reset bytes number since we can not check a sign */
3023 rdata->got_bytes = 0;
3024 /* FIXME: should this be counted toward the initiating task? */
3025 task_io_account_read(rdata->got_bytes);
3026 cifs_stats_bytes_read(tcon, rdata->got_bytes);
3029 if (rdata->result != -ENODATA)
3030 rdata->result = -EIO;
3032 #ifdef CONFIG_CIFS_SMB_DIRECT
3034 * If this rdata has a memmory registered, the MR can be freed
3035 * MR needs to be freed as soon as I/O finishes to prevent deadlock
3036 * because they have limited number and are used for future I/Os
3039 smbd_deregister_mr(rdata->mr);
3044 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
3046 queue_work(cifsiod_wq, &rdata->work);
3047 DeleteMidQEntry(mid);
3048 add_credits(server, credits_received, 0);
3051 /* smb2_async_readv - send an async read, and set up mid to handle result */
3053 smb2_async_readv(struct cifs_readdata *rdata)
3057 struct smb2_sync_hdr *shdr;
3058 struct cifs_io_parms io_parms;
3059 struct smb_rqst rqst = { .rq_iov = rdata->iov,
3061 struct TCP_Server_Info *server;
3062 unsigned int total_len;
3064 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
3065 __func__, rdata->offset, rdata->bytes);
3067 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
3068 io_parms.offset = rdata->offset;
3069 io_parms.length = rdata->bytes;
3070 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
3071 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
3072 io_parms.pid = rdata->pid;
3074 server = io_parms.tcon->ses->server;
3076 rc = smb2_new_read_req(
3077 (void **) &buf, &total_len, &io_parms, rdata, 0, 0);
3079 if (rc == -EAGAIN && rdata->credits) {
3080 /* credits was reset by reconnect */
3082 /* reduce in_flight value since we won't send the req */
3083 spin_lock(&server->req_lock);
3084 server->in_flight--;
3085 spin_unlock(&server->req_lock);
3090 if (smb3_encryption_required(io_parms.tcon))
3091 flags |= CIFS_TRANSFORM_REQ;
3093 rdata->iov[0].iov_base = buf;
3094 rdata->iov[0].iov_len = total_len;
3096 shdr = (struct smb2_sync_hdr *)buf;
3098 if (rdata->credits) {
3099 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
3100 SMB2_MAX_BUFFER_SIZE));
3101 shdr->CreditRequest = shdr->CreditCharge;
3102 spin_lock(&server->req_lock);
3103 server->credits += rdata->credits -
3104 le16_to_cpu(shdr->CreditCharge);
3105 spin_unlock(&server->req_lock);
3106 wake_up(&server->request_q);
3107 flags |= CIFS_HAS_CREDITS;
3110 kref_get(&rdata->refcount);
3111 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
3112 cifs_readv_receive, smb2_readv_callback,
3113 smb3_handle_read_data, rdata, flags);
3115 kref_put(&rdata->refcount, cifs_readdata_release);
3116 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
3117 trace_smb3_read_err(rc, 0 /* xid */, io_parms.persistent_fid,
3118 io_parms.tcon->tid, io_parms.tcon->ses->Suid,
3119 io_parms.offset, io_parms.length);
3121 trace_smb3_read_done(0 /* xid */, io_parms.persistent_fid,
3122 io_parms.tcon->tid, io_parms.tcon->ses->Suid,
3123 io_parms.offset, io_parms.length);
3125 cifs_small_buf_release(buf);
3130 SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
3131 unsigned int *nbytes, char **buf, int *buf_type)
3133 struct smb_rqst rqst;
3134 int resp_buftype, rc = -EACCES;
3135 struct smb2_read_plain_req *req = NULL;
3136 struct smb2_read_rsp *rsp = NULL;
3138 struct kvec rsp_iov;
3139 unsigned int total_len;
3140 int flags = CIFS_LOG_ERROR;
3141 struct cifs_ses *ses = io_parms->tcon->ses;
3144 rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0);
3148 if (smb3_encryption_required(io_parms->tcon))
3149 flags |= CIFS_TRANSFORM_REQ;
3151 iov[0].iov_base = (char *)req;
3152 iov[0].iov_len = total_len;
3154 memset(&rqst, 0, sizeof(struct smb_rqst));
3158 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
3159 cifs_small_buf_release(req);
3161 rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
3164 if (rc != -ENODATA) {
3165 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
3166 cifs_dbg(VFS, "Send error in read = %d\n", rc);
3168 trace_smb3_read_err(rc, xid, req->PersistentFileId,
3169 io_parms->tcon->tid, ses->Suid,
3170 io_parms->offset, io_parms->length);
3171 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
3172 return rc == -ENODATA ? 0 : rc;
3174 trace_smb3_read_done(xid, req->PersistentFileId,
3175 io_parms->tcon->tid, ses->Suid,
3176 io_parms->offset, io_parms->length);
3178 *nbytes = le32_to_cpu(rsp->DataLength);
3179 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
3180 (*nbytes > io_parms->length)) {
3181 cifs_dbg(FYI, "bad length %d for count %d\n",
3182 *nbytes, io_parms->length);
3188 memcpy(*buf, (char *)rsp + rsp->DataOffset, *nbytes);
3189 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
3190 } else if (resp_buftype != CIFS_NO_BUFFER) {
3191 *buf = rsp_iov.iov_base;
3192 if (resp_buftype == CIFS_SMALL_BUFFER)
3193 *buf_type = CIFS_SMALL_BUFFER;
3194 else if (resp_buftype == CIFS_LARGE_BUFFER)
3195 *buf_type = CIFS_LARGE_BUFFER;
3201 * Check the mid_state and signature on received buffer (if any), and queue the
3202 * workqueue completion task.
3205 smb2_writev_callback(struct mid_q_entry *mid)
3207 struct cifs_writedata *wdata = mid->callback_data;
3208 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
3209 unsigned int written;
3210 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
3211 unsigned int credits_received = 1;
3213 switch (mid->mid_state) {
3214 case MID_RESPONSE_RECEIVED:
3215 credits_received = le16_to_cpu(rsp->sync_hdr.CreditRequest);
3216 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
3217 if (wdata->result != 0)
3220 written = le32_to_cpu(rsp->DataLength);
3222 * Mask off high 16 bits when bytes written as returned
3223 * by the server is greater than bytes requested by the
3224 * client. OS/2 servers are known to set incorrect
3227 if (written > wdata->bytes)
3230 if (written < wdata->bytes)
3231 wdata->result = -ENOSPC;
3233 wdata->bytes = written;
3235 case MID_REQUEST_SUBMITTED:
3236 case MID_RETRY_NEEDED:
3237 wdata->result = -EAGAIN;
3240 wdata->result = -EIO;
3243 #ifdef CONFIG_CIFS_SMB_DIRECT
3245 * If this wdata has a memory registered, the MR can be freed
3246 * The number of MRs available is limited, it's important to recover
3247 * used MR as soon as I/O is finished. Hold MR longer in the later
3248 * I/O process can possibly result in I/O deadlock due to lack of MR
3249 * to send request on I/O retry
3252 smbd_deregister_mr(wdata->mr);
3257 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
3259 queue_work(cifsiod_wq, &wdata->work);
3260 DeleteMidQEntry(mid);
3261 add_credits(tcon->ses->server, credits_received, 0);
3264 /* smb2_async_writev - send an async write, and set up mid to handle result */
3266 smb2_async_writev(struct cifs_writedata *wdata,
3267 void (*release)(struct kref *kref))
3269 int rc = -EACCES, flags = 0;
3270 struct smb2_write_req *req = NULL;
3271 struct smb2_sync_hdr *shdr;
3272 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
3273 struct TCP_Server_Info *server = tcon->ses->server;
3275 struct smb_rqst rqst = { };
3276 unsigned int total_len;
3278 rc = smb2_plain_req_init(SMB2_WRITE, tcon, (void **) &req, &total_len);
3280 if (rc == -EAGAIN && wdata->credits) {
3281 /* credits was reset by reconnect */
3283 /* reduce in_flight value since we won't send the req */
3284 spin_lock(&server->req_lock);
3285 server->in_flight--;
3286 spin_unlock(&server->req_lock);
3288 goto async_writev_out;
3291 if (smb3_encryption_required(tcon))
3292 flags |= CIFS_TRANSFORM_REQ;
3294 shdr = (struct smb2_sync_hdr *)req;
3295 shdr->ProcessId = cpu_to_le32(wdata->cfile->pid);
3297 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
3298 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
3299 req->WriteChannelInfoOffset = 0;
3300 req->WriteChannelInfoLength = 0;
3302 req->Offset = cpu_to_le64(wdata->offset);
3303 req->DataOffset = cpu_to_le16(
3304 offsetof(struct smb2_write_req, Buffer));
3305 req->RemainingBytes = 0;
3306 #ifdef CONFIG_CIFS_SMB_DIRECT
3308 * If we want to do a server RDMA read, fill in and append
3309 * smbd_buffer_descriptor_v1 to the end of write request
3311 if (server->rdma && !server->sign && wdata->bytes >=
3312 server->smbd_conn->rdma_readwrite_threshold) {
3314 struct smbd_buffer_descriptor_v1 *v1;
3315 bool need_invalidate = server->dialect == SMB30_PROT_ID;
3317 wdata->mr = smbd_register_mr(
3318 server->smbd_conn, wdata->pages,
3319 wdata->nr_pages, wdata->page_offset,
3320 wdata->tailsz, false, need_invalidate);
3323 goto async_writev_out;
3326 req->DataOffset = 0;
3327 if (wdata->nr_pages > 1)
3328 req->RemainingBytes =
3330 (wdata->nr_pages - 1) * wdata->pagesz -
3331 wdata->page_offset + wdata->tailsz
3334 req->RemainingBytes = cpu_to_le32(wdata->tailsz);
3335 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
3336 if (need_invalidate)
3337 req->Channel = SMB2_CHANNEL_RDMA_V1;
3338 req->WriteChannelInfoOffset =
3339 cpu_to_le16(offsetof(struct smb2_write_req, Buffer));
3340 req->WriteChannelInfoLength =
3341 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
3342 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
3343 v1->offset = cpu_to_le64(wdata->mr->mr->iova);
3344 v1->token = cpu_to_le32(wdata->mr->mr->rkey);
3345 v1->length = cpu_to_le32(wdata->mr->mr->length);
3348 iov[0].iov_len = total_len - 1;
3349 iov[0].iov_base = (char *)req;
3353 rqst.rq_pages = wdata->pages;
3354 rqst.rq_offset = wdata->page_offset;
3355 rqst.rq_npages = wdata->nr_pages;
3356 rqst.rq_pagesz = wdata->pagesz;
3357 rqst.rq_tailsz = wdata->tailsz;
3358 #ifdef CONFIG_CIFS_SMB_DIRECT
3360 iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1);
3364 cifs_dbg(FYI, "async write at %llu %u bytes\n",
3365 wdata->offset, wdata->bytes);
3367 #ifdef CONFIG_CIFS_SMB_DIRECT
3368 /* For RDMA read, I/O size is in RemainingBytes not in Length */
3370 req->Length = cpu_to_le32(wdata->bytes);
3372 req->Length = cpu_to_le32(wdata->bytes);
3375 if (wdata->credits) {
3376 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
3377 SMB2_MAX_BUFFER_SIZE));
3378 shdr->CreditRequest = shdr->CreditCharge;
3379 spin_lock(&server->req_lock);
3380 server->credits += wdata->credits -
3381 le16_to_cpu(shdr->CreditCharge);
3382 spin_unlock(&server->req_lock);
3383 wake_up(&server->request_q);
3384 flags |= CIFS_HAS_CREDITS;
3387 kref_get(&wdata->refcount);
3388 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
3392 trace_smb3_write_err(0 /* no xid */, req->PersistentFileId,
3393 tcon->tid, tcon->ses->Suid, wdata->offset,
3395 kref_put(&wdata->refcount, release);
3396 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
3398 trace_smb3_write_done(0 /* no xid */, req->PersistentFileId,
3399 tcon->tid, tcon->ses->Suid, wdata->offset,
3403 cifs_small_buf_release(req);
3408 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
3409 * The length field from io_parms must be at least 1 and indicates a number of
3410 * elements with data to write that begins with position 1 in iov array. All
3411 * data length is specified by count.
3414 SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
3415 unsigned int *nbytes, struct kvec *iov, int n_vec)
3417 struct smb_rqst rqst;
3419 struct smb2_write_req *req = NULL;
3420 struct smb2_write_rsp *rsp = NULL;
3422 struct kvec rsp_iov;
3424 unsigned int total_len;
3431 rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, (void **) &req,
3436 if (io_parms->tcon->ses->server == NULL)
3437 return -ECONNABORTED;
3439 if (smb3_encryption_required(io_parms->tcon))
3440 flags |= CIFS_TRANSFORM_REQ;
3442 req->sync_hdr.ProcessId = cpu_to_le32(io_parms->pid);
3444 req->PersistentFileId = io_parms->persistent_fid;
3445 req->VolatileFileId = io_parms->volatile_fid;
3446 req->WriteChannelInfoOffset = 0;
3447 req->WriteChannelInfoLength = 0;
3449 req->Length = cpu_to_le32(io_parms->length);
3450 req->Offset = cpu_to_le64(io_parms->offset);
3451 req->DataOffset = cpu_to_le16(
3452 offsetof(struct smb2_write_req, Buffer));
3453 req->RemainingBytes = 0;
3455 iov[0].iov_base = (char *)req;
3457 iov[0].iov_len = total_len - 1;
3459 memset(&rqst, 0, sizeof(struct smb_rqst));
3461 rqst.rq_nvec = n_vec + 1;
3463 rc = cifs_send_recv(xid, io_parms->tcon->ses, &rqst,
3464 &resp_buftype, flags, &rsp_iov);
3465 cifs_small_buf_release(req);
3466 rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
3469 trace_smb3_write_err(xid, req->PersistentFileId,
3470 io_parms->tcon->tid,
3471 io_parms->tcon->ses->Suid,
3472 io_parms->offset, io_parms->length, rc);
3473 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
3474 cifs_dbg(VFS, "Send error in write = %d\n", rc);
3476 *nbytes = le32_to_cpu(rsp->DataLength);
3477 trace_smb3_write_done(xid, req->PersistentFileId,
3478 io_parms->tcon->tid,
3479 io_parms->tcon->ses->Suid,
3480 io_parms->offset, *nbytes);
3483 free_rsp_buf(resp_buftype, rsp);
3488 num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
3491 unsigned int entrycount = 0;
3492 unsigned int next_offset = 0;
3493 FILE_DIRECTORY_INFO *entryptr;
3495 if (bufstart == NULL)
3498 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
3501 entryptr = (FILE_DIRECTORY_INFO *)
3502 ((char *)entryptr + next_offset);
3504 if ((char *)entryptr + size > end_of_buf) {
3505 cifs_dbg(VFS, "malformed search entry would overflow\n");
3509 len = le32_to_cpu(entryptr->FileNameLength);
3510 if ((char *)entryptr + len + size > end_of_buf) {
3511 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
3516 *lastentry = (char *)entryptr;
3519 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
3531 SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
3532 u64 persistent_fid, u64 volatile_fid, int index,
3533 struct cifs_search_info *srch_inf)
3535 struct smb_rqst rqst;
3536 struct smb2_query_directory_req *req;
3537 struct smb2_query_directory_rsp *rsp = NULL;
3539 struct kvec rsp_iov;
3542 int resp_buftype = CIFS_NO_BUFFER;
3543 unsigned char *bufptr;
3544 struct TCP_Server_Info *server;
3545 struct cifs_ses *ses = tcon->ses;
3546 __le16 asteriks = cpu_to_le16('*');
3548 unsigned int output_size = CIFSMaxBufSize;
3549 size_t info_buf_size;
3551 unsigned int total_len;
3553 if (ses && (ses->server))
3554 server = ses->server;
3558 rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req,
3563 if (smb3_encryption_required(tcon))
3564 flags |= CIFS_TRANSFORM_REQ;
3566 switch (srch_inf->info_level) {
3567 case SMB_FIND_FILE_DIRECTORY_INFO:
3568 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
3569 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
3571 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
3572 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
3573 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
3576 cifs_dbg(VFS, "info level %u isn't supported\n",
3577 srch_inf->info_level);
3582 req->FileIndex = cpu_to_le32(index);
3583 req->PersistentFileId = persistent_fid;
3584 req->VolatileFileId = volatile_fid;
3587 bufptr = req->Buffer;
3588 memcpy(bufptr, &asteriks, len);
3590 req->FileNameOffset =
3591 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1);
3592 req->FileNameLength = cpu_to_le16(len);
3594 * BB could be 30 bytes or so longer if we used SMB2 specific
3595 * buffer lengths, but this is safe and close enough.
3597 output_size = min_t(unsigned int, output_size, server->maxBuf);
3598 output_size = min_t(unsigned int, output_size, 2 << 15);
3599 req->OutputBufferLength = cpu_to_le32(output_size);
3601 iov[0].iov_base = (char *)req;
3603 iov[0].iov_len = total_len - 1;
3605 iov[1].iov_base = (char *)(req->Buffer);
3606 iov[1].iov_len = len;
3608 memset(&rqst, 0, sizeof(struct smb_rqst));
3612 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
3613 cifs_small_buf_release(req);
3614 rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
3617 if (rc == -ENODATA &&
3618 rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
3619 srch_inf->endOfSearch = true;
3622 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
3626 rc = validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
3627 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
3632 srch_inf->unicode = true;
3634 if (srch_inf->ntwrk_buf_start) {
3635 if (srch_inf->smallBuf)
3636 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
3638 cifs_buf_release(srch_inf->ntwrk_buf_start);
3640 srch_inf->ntwrk_buf_start = (char *)rsp;
3641 srch_inf->srch_entries_start = srch_inf->last_entry =
3642 (char *)rsp + le16_to_cpu(rsp->OutputBufferOffset);
3643 end_of_smb = rsp_iov.iov_len + (char *)rsp;
3644 srch_inf->entries_in_buffer =
3645 num_entries(srch_inf->srch_entries_start, end_of_smb,
3646 &srch_inf->last_entry, info_buf_size);
3647 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
3648 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
3649 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
3650 srch_inf->srch_entries_start, srch_inf->last_entry);
3651 if (resp_buftype == CIFS_LARGE_BUFFER)
3652 srch_inf->smallBuf = false;
3653 else if (resp_buftype == CIFS_SMALL_BUFFER)
3654 srch_inf->smallBuf = true;
3656 cifs_dbg(VFS, "illegal search buffer type\n");
3661 free_rsp_buf(resp_buftype, rsp);
3666 send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
3667 u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
3668 u8 info_type, u32 additional_info, unsigned int num,
3669 void **data, unsigned int *size)
3671 struct smb_rqst rqst;
3672 struct smb2_set_info_req *req;
3673 struct smb2_set_info_rsp *rsp = NULL;
3675 struct kvec rsp_iov;
3679 struct cifs_ses *ses = tcon->ses;
3681 unsigned int total_len;
3683 if (!ses || !(ses->server))
3689 iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL);
3693 rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, (void **) &req, &total_len);
3699 if (smb3_encryption_required(tcon))
3700 flags |= CIFS_TRANSFORM_REQ;
3702 req->sync_hdr.ProcessId = cpu_to_le32(pid);
3704 req->InfoType = info_type;
3705 req->FileInfoClass = info_class;
3706 req->PersistentFileId = persistent_fid;
3707 req->VolatileFileId = volatile_fid;
3708 req->AdditionalInformation = cpu_to_le32(additional_info);
3711 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1);
3712 req->BufferLength = cpu_to_le32(*size);
3714 memcpy(req->Buffer, *data, *size);
3717 iov[0].iov_base = (char *)req;
3719 iov[0].iov_len = total_len - 1;
3721 for (i = 1; i < num; i++) {
3722 le32_add_cpu(&req->BufferLength, size[i]);
3723 iov[i].iov_base = (char *)data[i];
3724 iov[i].iov_len = size[i];
3727 memset(&rqst, 0, sizeof(struct smb_rqst));
3731 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
3733 cifs_buf_release(req);
3734 rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
3737 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
3738 trace_smb3_set_info_err(xid, persistent_fid, tcon->tid,
3739 ses->Suid, info_class, (__u32)info_type, rc);
3742 free_rsp_buf(resp_buftype, rsp);
3748 SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
3749 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3751 struct smb2_file_rename_info info;
3753 unsigned int size[2];
3755 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3757 data = kmalloc_array(2, sizeof(void *), GFP_KERNEL);
3761 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
3762 /* 0 = fail if target already exists */
3763 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3764 info.FileNameLength = cpu_to_le32(len);
3767 size[0] = sizeof(struct smb2_file_rename_info);
3769 data[1] = target_file;
3770 size[1] = len + 2 /* null */;
3772 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
3773 current->tgid, FILE_RENAME_INFORMATION, SMB2_O_INFO_FILE,
3780 SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
3781 u64 persistent_fid, u64 volatile_fid)
3783 __u8 delete_pending = 1;
3787 data = &delete_pending;
3788 size = 1; /* sizeof __u8 */
3790 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3791 current->tgid, FILE_DISPOSITION_INFORMATION, SMB2_O_INFO_FILE,
3792 0, 1, &data, &size);
3796 SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
3797 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3799 struct smb2_file_link_info info;
3801 unsigned int size[2];
3803 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3805 data = kmalloc_array(2, sizeof(void *), GFP_KERNEL);
3809 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
3810 /* 0 = fail if link already exists */
3811 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3812 info.FileNameLength = cpu_to_le32(len);
3815 size[0] = sizeof(struct smb2_file_link_info);
3817 data[1] = target_file;
3818 size[1] = len + 2 /* null */;
3820 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
3821 current->tgid, FILE_LINK_INFORMATION, SMB2_O_INFO_FILE,
3828 SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
3829 u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc)
3831 struct smb2_file_eof_info info;
3835 info.EndOfFile = *eof;
3838 size = sizeof(struct smb2_file_eof_info);
3841 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3842 pid, FILE_ALLOCATION_INFORMATION, SMB2_O_INFO_FILE,
3843 0, 1, &data, &size);
3845 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3846 pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE,
3847 0, 1, &data, &size);
3851 SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
3852 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
3855 size = sizeof(FILE_BASIC_INFO);
3856 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3857 current->tgid, FILE_BASIC_INFORMATION, SMB2_O_INFO_FILE,
3858 0, 1, (void **)&buf, &size);
3862 SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
3863 u64 persistent_fid, u64 volatile_fid,
3864 struct cifs_ntsd *pnntsd, int pacllen, int aclflag)
3866 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3867 current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag,
3868 1, (void **)&pnntsd, &pacllen);
3872 SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
3873 u64 persistent_fid, u64 volatile_fid,
3874 struct smb2_file_full_ea_info *buf, int len)
3876 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3877 current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE,
3878 0, 1, (void **)&buf, &len);
3882 SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
3883 const u64 persistent_fid, const u64 volatile_fid,
3886 struct smb_rqst rqst;
3888 struct smb2_oplock_break *req = NULL;
3889 struct cifs_ses *ses = tcon->ses;
3890 int flags = CIFS_OBREAK_OP;
3891 unsigned int total_len;
3893 struct kvec rsp_iov;
3896 cifs_dbg(FYI, "SMB2_oplock_break\n");
3897 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
3902 if (smb3_encryption_required(tcon))
3903 flags |= CIFS_TRANSFORM_REQ;
3905 req->VolatileFid = volatile_fid;
3906 req->PersistentFid = persistent_fid;
3907 req->OplockLevel = oplock_level;
3908 req->sync_hdr.CreditRequest = cpu_to_le16(1);
3910 flags |= CIFS_NO_RESP;
3912 iov[0].iov_base = (char *)req;
3913 iov[0].iov_len = total_len;
3915 memset(&rqst, 0, sizeof(struct smb_rqst));
3919 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
3920 cifs_small_buf_release(req);
3923 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
3924 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
3931 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
3932 struct kstatfs *kst)
3934 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
3935 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
3936 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
3937 kst->f_bfree = kst->f_bavail =
3938 le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
3943 build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
3944 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
3946 struct TCP_Server_Info *server;
3948 struct smb2_query_info_req *req;
3949 unsigned int total_len;
3951 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
3953 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
3956 server = tcon->ses->server;
3958 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
3963 req->InfoType = SMB2_O_INFO_FILESYSTEM;
3964 req->FileInfoClass = level;
3965 req->PersistentFileId = persistent_fid;
3966 req->VolatileFileId = volatile_fid;
3968 req->InputBufferOffset =
3969 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1);
3970 req->OutputBufferLength = cpu_to_le32(
3971 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1);
3973 iov->iov_base = (char *)req;
3974 iov->iov_len = total_len;
3979 SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
3980 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
3982 struct smb_rqst rqst;
3983 struct smb2_query_info_rsp *rsp = NULL;
3985 struct kvec rsp_iov;
3988 struct cifs_ses *ses = tcon->ses;
3989 struct smb2_fs_full_size_info *info = NULL;
3992 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
3993 sizeof(struct smb2_fs_full_size_info),
3994 persistent_fid, volatile_fid);
3998 if (smb3_encryption_required(tcon))
3999 flags |= CIFS_TRANSFORM_REQ;
4001 memset(&rqst, 0, sizeof(struct smb_rqst));
4005 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
4006 cifs_small_buf_release(iov.iov_base);
4008 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
4011 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
4013 info = (struct smb2_fs_full_size_info *)(
4014 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
4015 rc = validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
4016 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
4017 sizeof(struct smb2_fs_full_size_info));
4019 copy_fs_info_to_kstatfs(info, fsdata);
4022 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
4027 SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
4028 u64 persistent_fid, u64 volatile_fid, int level)
4030 struct smb_rqst rqst;
4031 struct smb2_query_info_rsp *rsp = NULL;
4033 struct kvec rsp_iov;
4035 int resp_buftype, max_len, min_len;
4036 struct cifs_ses *ses = tcon->ses;
4037 unsigned int rsp_len, offset;
4040 if (level == FS_DEVICE_INFORMATION) {
4041 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
4042 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
4043 } else if (level == FS_ATTRIBUTE_INFORMATION) {
4044 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
4045 min_len = MIN_FS_ATTR_INFO_SIZE;
4046 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
4047 max_len = sizeof(struct smb3_fs_ss_info);
4048 min_len = sizeof(struct smb3_fs_ss_info);
4050 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
4054 rc = build_qfs_info_req(&iov, tcon, level, max_len,
4055 persistent_fid, volatile_fid);
4059 if (smb3_encryption_required(tcon))
4060 flags |= CIFS_TRANSFORM_REQ;
4062 memset(&rqst, 0, sizeof(struct smb_rqst));
4066 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
4067 cifs_small_buf_release(iov.iov_base);
4069 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
4072 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
4074 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
4075 offset = le16_to_cpu(rsp->OutputBufferOffset);
4076 rc = validate_iov(offset, rsp_len, &rsp_iov, min_len);
4080 if (level == FS_ATTRIBUTE_INFORMATION)
4081 memcpy(&tcon->fsAttrInfo, offset
4082 + (char *)rsp, min_t(unsigned int,
4084 else if (level == FS_DEVICE_INFORMATION)
4085 memcpy(&tcon->fsDevInfo, offset
4086 + (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO));
4087 else if (level == FS_SECTOR_SIZE_INFORMATION) {
4088 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
4089 (offset + (char *)rsp);
4090 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
4091 tcon->perf_sector_size =
4092 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
4096 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
4101 smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
4102 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
4103 const __u32 num_lock, struct smb2_lock_element *buf)
4105 struct smb_rqst rqst;
4107 struct smb2_lock_req *req = NULL;
4109 struct kvec rsp_iov;
4112 int flags = CIFS_NO_RESP;
4113 unsigned int total_len;
4115 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
4117 rc = smb2_plain_req_init(SMB2_LOCK, tcon, (void **) &req, &total_len);
4121 if (smb3_encryption_required(tcon))
4122 flags |= CIFS_TRANSFORM_REQ;
4124 req->sync_hdr.ProcessId = cpu_to_le32(pid);
4125 req->LockCount = cpu_to_le16(num_lock);
4127 req->PersistentFileId = persist_fid;
4128 req->VolatileFileId = volatile_fid;
4130 count = num_lock * sizeof(struct smb2_lock_element);
4132 iov[0].iov_base = (char *)req;
4133 iov[0].iov_len = total_len - sizeof(struct smb2_lock_element);
4134 iov[1].iov_base = (char *)buf;
4135 iov[1].iov_len = count;
4137 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
4139 memset(&rqst, 0, sizeof(struct smb_rqst));
4143 rc = cifs_send_recv(xid, tcon->ses, &rqst, &resp_buf_type, flags,
4145 cifs_small_buf_release(req);
4147 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
4148 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
4149 trace_smb3_lock_err(xid, persist_fid, tcon->tid,
4150 tcon->ses->Suid, rc);
4157 SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
4158 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
4159 const __u64 length, const __u64 offset, const __u32 lock_flags,
4162 struct smb2_lock_element lock;
4164 lock.Offset = cpu_to_le64(offset);
4165 lock.Length = cpu_to_le64(length);
4166 lock.Flags = cpu_to_le32(lock_flags);
4167 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
4168 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
4170 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
4174 SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
4175 __u8 *lease_key, const __le32 lease_state)
4177 struct smb_rqst rqst;
4179 struct smb2_lease_ack *req = NULL;
4180 struct cifs_ses *ses = tcon->ses;
4181 int flags = CIFS_OBREAK_OP;
4182 unsigned int total_len;
4184 struct kvec rsp_iov;
4187 cifs_dbg(FYI, "SMB2_lease_break\n");
4188 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
4193 if (smb3_encryption_required(tcon))
4194 flags |= CIFS_TRANSFORM_REQ;
4196 req->sync_hdr.CreditRequest = cpu_to_le16(1);
4197 req->StructureSize = cpu_to_le16(36);
4200 memcpy(req->LeaseKey, lease_key, 16);
4201 req->LeaseState = lease_state;
4203 flags |= CIFS_NO_RESP;
4205 iov[0].iov_base = (char *)req;
4206 iov[0].iov_len = total_len;
4208 memset(&rqst, 0, sizeof(struct smb_rqst));
4212 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
4213 cifs_small_buf_release(req);
4216 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
4217 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);