1 // SPDX-License-Identifier: LGPL-2.1
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
13 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
14 /* Note that there are handle based routines which must be */
15 /* treated slightly differently for reconnection purposes since we never */
16 /* want to reuse a stale file handle and only the caller knows the file info */
19 #include <linux/kernel.h>
20 #include <linux/vfs.h>
21 #include <linux/task_io_accounting_ops.h>
22 #include <linux/uaccess.h>
23 #include <linux/uuid.h>
24 #include <linux/pagemap.h>
25 #include <linux/xattr.h>
28 #include "cifsproto.h"
29 #include "smb2proto.h"
30 #include "cifs_unicode.h"
31 #include "cifs_debug.h"
33 #include "smb2status.h"
36 #include "cifs_spnego.h"
37 #include "smbdirect.h"
39 #ifdef CONFIG_CIFS_DFS_UPCALL
40 #include "dfs_cache.h"
42 #include "cached_dir.h"
45 * The following table defines the expected "StructureSize" of SMB2 requests
46 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
48 * Note that commands are defined in smb2pdu.h in le16 but the array below is
49 * indexed by command in host byte order.
51 static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
52 /* SMB2_NEGOTIATE */ 36,
53 /* SMB2_SESSION_SETUP */ 25,
55 /* SMB2_TREE_CONNECT */ 9,
56 /* SMB2_TREE_DISCONNECT */ 4,
66 /* SMB2_QUERY_DIRECTORY */ 33,
67 /* SMB2_CHANGE_NOTIFY */ 32,
68 /* SMB2_QUERY_INFO */ 41,
69 /* SMB2_SET_INFO */ 33,
70 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
73 int smb3_encryption_required(const struct cifs_tcon *tcon)
75 if (!tcon || !tcon->ses)
77 if ((tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
78 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
81 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
87 smb2_hdr_assemble(struct smb2_hdr *shdr, __le16 smb2_cmd,
88 const struct cifs_tcon *tcon,
89 struct TCP_Server_Info *server)
91 struct smb3_hdr_req *smb3_hdr;
93 shdr->ProtocolId = SMB2_PROTO_NUMBER;
94 shdr->StructureSize = cpu_to_le16(64);
95 shdr->Command = smb2_cmd;
98 /* After reconnect SMB3 must set ChannelSequence on subsequent reqs */
99 if (server->dialect >= SMB30_PROT_ID) {
100 smb3_hdr = (struct smb3_hdr_req *)shdr;
102 * if primary channel is not set yet, use default
103 * channel for chan sequence num
105 if (SERVER_IS_CHAN(server))
106 smb3_hdr->ChannelSequence =
107 cpu_to_le16(server->primary_server->channel_sequence_num);
109 smb3_hdr->ChannelSequence =
110 cpu_to_le16(server->channel_sequence_num);
112 spin_lock(&server->req_lock);
113 /* Request up to 10 credits but don't go over the limit. */
114 if (server->credits >= server->max_credits)
115 shdr->CreditRequest = cpu_to_le16(0);
117 shdr->CreditRequest = cpu_to_le16(
118 min_t(int, server->max_credits -
119 server->credits, 10));
120 spin_unlock(&server->req_lock);
122 shdr->CreditRequest = cpu_to_le16(2);
124 shdr->Id.SyncId.ProcessId = cpu_to_le32((__u16)current->tgid);
129 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
130 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
131 if (server && (server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
132 shdr->CreditCharge = cpu_to_le16(1);
133 /* else CreditCharge MBZ */
135 shdr->Id.SyncId.TreeId = cpu_to_le32(tcon->tid);
136 /* Uid is not converted */
138 shdr->SessionId = cpu_to_le64(tcon->ses->Suid);
141 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
142 * to pass the path on the Open SMB prefixed by \\server\share.
143 * Not sure when we would need to do the augmented path (if ever) and
144 * setting this flag breaks the SMB2 open operation since it is
145 * illegal to send an empty path name (without \\server\share prefix)
146 * when the DFS flag is set in the SMB open header. We could
147 * consider setting the flag on all operations other than open
148 * but it is safer to net set it for now.
150 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
151 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
153 if (server && server->sign && !smb3_encryption_required(tcon))
154 shdr->Flags |= SMB2_FLAGS_SIGNED;
160 smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon,
161 struct TCP_Server_Info *server)
164 struct nls_table *nls_codepage = NULL;
165 struct cifs_ses *ses;
168 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
169 * check for tcp and smb session status done differently
170 * for those three - in the calling routine.
176 * Need to also skip SMB2_IOCTL because it is used for checking nested dfs links in
177 * cifs_tree_connect().
179 if (smb2_command == SMB2_TREE_CONNECT || smb2_command == SMB2_IOCTL)
182 spin_lock(&tcon->tc_lock);
183 if (tcon->status == TID_EXITING) {
185 * only tree disconnect allowed when disconnecting ...
187 if (smb2_command != SMB2_TREE_DISCONNECT) {
188 spin_unlock(&tcon->tc_lock);
189 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
194 spin_unlock(&tcon->tc_lock);
199 spin_lock(&ses->ses_lock);
200 if (ses->ses_status == SES_EXITING) {
201 spin_unlock(&ses->ses_lock);
204 spin_unlock(&ses->ses_lock);
205 if (!ses->server || !server)
208 spin_lock(&server->srv_lock);
209 if (server->tcpStatus == CifsNeedReconnect) {
211 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
212 * here since they are implicitly done when session drops.
214 switch (smb2_command) {
216 * BB Should we keep oplock break and add flush to exceptions?
218 case SMB2_TREE_DISCONNECT:
221 case SMB2_OPLOCK_BREAK:
222 spin_unlock(&server->srv_lock);
226 spin_unlock(&server->srv_lock);
229 rc = cifs_wait_for_server_reconnect(server, tcon->retry);
233 spin_lock(&ses->chan_lock);
234 if (!cifs_chan_needs_reconnect(ses, server) && !tcon->need_reconnect) {
235 spin_unlock(&ses->chan_lock);
238 spin_unlock(&ses->chan_lock);
239 cifs_dbg(FYI, "sess reconnect mask: 0x%lx, tcon reconnect: %d",
240 tcon->ses->chans_need_reconnect,
241 tcon->need_reconnect);
243 mutex_lock(&ses->session_mutex);
245 * Recheck after acquire mutex. If another thread is negotiating
246 * and the server never sends an answer the socket will be closed
247 * and tcpStatus set to reconnect.
249 spin_lock(&server->srv_lock);
250 if (server->tcpStatus == CifsNeedReconnect) {
251 spin_unlock(&server->srv_lock);
252 mutex_unlock(&ses->session_mutex);
260 spin_unlock(&server->srv_lock);
262 nls_codepage = ses->local_nls;
265 * need to prevent multiple threads trying to simultaneously
266 * reconnect the same SMB session
268 spin_lock(&ses->ses_lock);
269 spin_lock(&ses->chan_lock);
270 if (!cifs_chan_needs_reconnect(ses, server) &&
271 ses->ses_status == SES_GOOD) {
272 spin_unlock(&ses->chan_lock);
273 spin_unlock(&ses->ses_lock);
274 /* this means that we only need to tree connect */
275 if (tcon->need_reconnect)
276 goto skip_sess_setup;
278 mutex_unlock(&ses->session_mutex);
281 spin_unlock(&ses->chan_lock);
282 spin_unlock(&ses->ses_lock);
284 rc = cifs_negotiate_protocol(0, ses, server);
286 rc = cifs_setup_session(0, ses, server, nls_codepage);
287 if ((rc == -EACCES) && !tcon->retry) {
288 mutex_unlock(&ses->session_mutex);
292 mutex_unlock(&ses->session_mutex);
296 mutex_unlock(&ses->session_mutex);
301 if (!tcon->need_reconnect) {
302 mutex_unlock(&ses->session_mutex);
305 cifs_mark_open_files_invalid(tcon);
306 if (tcon->use_persistent)
307 tcon->need_reopen_files = true;
309 rc = cifs_tree_connect(0, tcon, nls_codepage);
310 mutex_unlock(&ses->session_mutex);
312 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
314 /* If sess reconnected but tcon didn't, something strange ... */
315 cifs_dbg(VFS, "reconnect tcon failed rc = %d\n", rc);
319 if (smb2_command != SMB2_INTERNAL_CMD)
320 mod_delayed_work(cifsiod_wq, &server->reconnect, 0);
322 atomic_inc(&tconInfoReconnectCount);
325 * Check if handle based operation so we know whether we can continue
326 * or not without returning to caller to reset file handle.
329 * BB Is flush done by server on drop of tcp session? Should we special
330 * case it and skip above?
332 switch (smb2_command) {
337 case SMB2_QUERY_DIRECTORY:
338 case SMB2_CHANGE_NOTIFY:
339 case SMB2_QUERY_INFO:
348 fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon,
349 struct TCP_Server_Info *server,
351 unsigned int *total_len)
353 struct smb2_pdu *spdu = buf;
354 /* lookup word count ie StructureSize from table */
355 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)];
358 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
359 * largest operations (Create)
363 smb2_hdr_assemble(&spdu->hdr, smb2_command, tcon, server);
364 spdu->StructureSize2 = cpu_to_le16(parmsize);
366 *total_len = parmsize + sizeof(struct smb2_hdr);
370 * Allocate and return pointer to an SMB request hdr, and set basic
371 * SMB information in the SMB header. If the return code is zero, this
372 * function must have filled in request_buf pointer.
374 static int __smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
375 struct TCP_Server_Info *server,
376 void **request_buf, unsigned int *total_len)
378 /* BB eventually switch this to SMB2 specific small buf size */
379 if (smb2_command == SMB2_SET_INFO)
380 *request_buf = cifs_buf_get();
382 *request_buf = cifs_small_buf_get();
383 if (*request_buf == NULL) {
384 /* BB should we add a retry in here if not a writepage? */
388 fill_small_buf(smb2_command, tcon, server,
389 (struct smb2_hdr *)(*request_buf),
393 uint16_t com_code = le16_to_cpu(smb2_command);
394 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
395 cifs_stats_inc(&tcon->num_smbs_sent);
401 static int smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
402 struct TCP_Server_Info *server,
403 void **request_buf, unsigned int *total_len)
407 rc = smb2_reconnect(smb2_command, tcon, server);
411 return __smb2_plain_req_init(smb2_command, tcon, server, request_buf,
415 static int smb2_ioctl_req_init(u32 opcode, struct cifs_tcon *tcon,
416 struct TCP_Server_Info *server,
417 void **request_buf, unsigned int *total_len)
419 /* Skip reconnect only for FSCTL_VALIDATE_NEGOTIATE_INFO IOCTLs */
420 if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) {
421 return __smb2_plain_req_init(SMB2_IOCTL, tcon, server,
422 request_buf, total_len);
424 return smb2_plain_req_init(SMB2_IOCTL, tcon, server,
425 request_buf, total_len);
428 /* For explanation of negotiate contexts see MS-SMB2 section 2.2.3.1 */
431 build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
433 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
434 pneg_ctxt->DataLength = cpu_to_le16(38);
435 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
436 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
437 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
438 pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
442 build_compression_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt)
444 pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES;
445 pneg_ctxt->DataLength =
446 cpu_to_le16(sizeof(struct smb2_compression_capabilities_context)
447 - sizeof(struct smb2_neg_context));
448 pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(3);
449 pneg_ctxt->CompressionAlgorithms[0] = SMB3_COMPRESS_LZ77;
450 pneg_ctxt->CompressionAlgorithms[1] = SMB3_COMPRESS_LZ77_HUFF;
451 pneg_ctxt->CompressionAlgorithms[2] = SMB3_COMPRESS_LZNT1;
455 build_signing_ctxt(struct smb2_signing_capabilities *pneg_ctxt)
457 unsigned int ctxt_len = sizeof(struct smb2_signing_capabilities);
458 unsigned short num_algs = 1; /* number of signing algorithms sent */
460 pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
462 * Context Data length must be rounded to multiple of 8 for some servers
464 pneg_ctxt->DataLength = cpu_to_le16(ALIGN(sizeof(struct smb2_signing_capabilities) -
465 sizeof(struct smb2_neg_context) +
466 (num_algs * sizeof(u16)), 8));
467 pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(num_algs);
468 pneg_ctxt->SigningAlgorithms[0] = cpu_to_le16(SIGNING_ALG_AES_CMAC);
470 ctxt_len += sizeof(__le16) * num_algs;
471 ctxt_len = ALIGN(ctxt_len, 8);
473 /* TBD add SIGNING_ALG_AES_GMAC and/or SIGNING_ALG_HMAC_SHA256 */
477 build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
479 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
480 if (require_gcm_256) {
481 pneg_ctxt->DataLength = cpu_to_le16(4); /* Cipher Count + 1 cipher */
482 pneg_ctxt->CipherCount = cpu_to_le16(1);
483 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES256_GCM;
484 } else if (enable_gcm_256) {
485 pneg_ctxt->DataLength = cpu_to_le16(8); /* Cipher Count + 3 ciphers */
486 pneg_ctxt->CipherCount = cpu_to_le16(3);
487 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
488 pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES256_GCM;
489 pneg_ctxt->Ciphers[2] = SMB2_ENCRYPTION_AES128_CCM;
491 pneg_ctxt->DataLength = cpu_to_le16(6); /* Cipher Count + 2 ciphers */
492 pneg_ctxt->CipherCount = cpu_to_le16(2);
493 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
494 pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM;
499 build_netname_ctxt(struct smb2_netname_neg_context *pneg_ctxt, char *hostname)
501 struct nls_table *cp = load_nls_default();
503 pneg_ctxt->ContextType = SMB2_NETNAME_NEGOTIATE_CONTEXT_ID;
505 /* copy up to max of first 100 bytes of server name to NetName field */
506 pneg_ctxt->DataLength = cpu_to_le16(2 * cifs_strtoUTF16(pneg_ctxt->NetName, hostname, 100, cp));
507 /* context size is DataLength + minimal smb2_neg_context */
508 return ALIGN(le16_to_cpu(pneg_ctxt->DataLength) + sizeof(struct smb2_neg_context), 8);
512 build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
514 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
515 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
516 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
517 pneg_ctxt->Name[0] = 0x93;
518 pneg_ctxt->Name[1] = 0xAD;
519 pneg_ctxt->Name[2] = 0x25;
520 pneg_ctxt->Name[3] = 0x50;
521 pneg_ctxt->Name[4] = 0x9C;
522 pneg_ctxt->Name[5] = 0xB4;
523 pneg_ctxt->Name[6] = 0x11;
524 pneg_ctxt->Name[7] = 0xE7;
525 pneg_ctxt->Name[8] = 0xB4;
526 pneg_ctxt->Name[9] = 0x23;
527 pneg_ctxt->Name[10] = 0x83;
528 pneg_ctxt->Name[11] = 0xDE;
529 pneg_ctxt->Name[12] = 0x96;
530 pneg_ctxt->Name[13] = 0x8B;
531 pneg_ctxt->Name[14] = 0xCD;
532 pneg_ctxt->Name[15] = 0x7C;
536 assemble_neg_contexts(struct smb2_negotiate_req *req,
537 struct TCP_Server_Info *server, unsigned int *total_len)
539 unsigned int ctxt_len, neg_context_count;
540 struct TCP_Server_Info *pserver;
544 if (*total_len > 200) {
545 /* In case length corrupted don't want to overrun smb buffer */
546 cifs_server_dbg(VFS, "Bad frame length assembling neg contexts\n");
551 * round up total_len of fixed part of SMB3 negotiate request to 8
552 * byte boundary before adding negotiate contexts
554 *total_len = ALIGN(*total_len, 8);
556 pneg_ctxt = (*total_len) + (char *)req;
557 req->NegotiateContextOffset = cpu_to_le32(*total_len);
559 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
560 ctxt_len = ALIGN(sizeof(struct smb2_preauth_neg_context), 8);
561 *total_len += ctxt_len;
562 pneg_ctxt += ctxt_len;
564 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
565 ctxt_len = ALIGN(sizeof(struct smb2_encryption_neg_context), 8);
566 *total_len += ctxt_len;
567 pneg_ctxt += ctxt_len;
570 * secondary channels don't have the hostname field populated
571 * use the hostname field in the primary channel instead
573 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
574 cifs_server_lock(pserver);
575 hostname = pserver->hostname;
576 if (hostname && (hostname[0] != 0)) {
577 ctxt_len = build_netname_ctxt((struct smb2_netname_neg_context *)pneg_ctxt,
579 *total_len += ctxt_len;
580 pneg_ctxt += ctxt_len;
581 neg_context_count = 3;
583 neg_context_count = 2;
584 cifs_server_unlock(pserver);
586 build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
587 *total_len += sizeof(struct smb2_posix_neg_context);
588 pneg_ctxt += sizeof(struct smb2_posix_neg_context);
591 if (server->compress_algorithm) {
592 build_compression_ctxt((struct smb2_compression_capabilities_context *)
594 ctxt_len = ALIGN(sizeof(struct smb2_compression_capabilities_context), 8);
595 *total_len += ctxt_len;
596 pneg_ctxt += ctxt_len;
600 if (enable_negotiate_signing) {
601 ctxt_len = build_signing_ctxt((struct smb2_signing_capabilities *)
603 *total_len += ctxt_len;
604 pneg_ctxt += ctxt_len;
608 /* check for and add transport_capabilities and signing capabilities */
609 req->NegotiateContextCount = cpu_to_le16(neg_context_count);
613 /* If invalid preauth context warn but use what we requested, SHA-512 */
614 static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt)
616 unsigned int len = le16_to_cpu(ctxt->DataLength);
619 * Caller checked that DataLength remains within SMB boundary. We still
620 * need to confirm that one HashAlgorithms member is accounted for.
622 if (len < MIN_PREAUTH_CTXT_DATA_LEN) {
623 pr_warn_once("server sent bad preauth context\n");
625 } else if (len < MIN_PREAUTH_CTXT_DATA_LEN + le16_to_cpu(ctxt->SaltLength)) {
626 pr_warn_once("server sent invalid SaltLength\n");
629 if (le16_to_cpu(ctxt->HashAlgorithmCount) != 1)
630 pr_warn_once("Invalid SMB3 hash algorithm count\n");
631 if (ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
632 pr_warn_once("unknown SMB3 hash algorithm\n");
635 static void decode_compress_ctx(struct TCP_Server_Info *server,
636 struct smb2_compression_capabilities_context *ctxt)
638 unsigned int len = le16_to_cpu(ctxt->DataLength);
641 * Caller checked that DataLength remains within SMB boundary. We still
642 * need to confirm that one CompressionAlgorithms member is accounted
646 pr_warn_once("server sent bad compression cntxt\n");
649 if (le16_to_cpu(ctxt->CompressionAlgorithmCount) != 1) {
650 pr_warn_once("Invalid SMB3 compress algorithm count\n");
653 if (le16_to_cpu(ctxt->CompressionAlgorithms[0]) > 3) {
654 pr_warn_once("unknown compression algorithm\n");
657 server->compress_algorithm = ctxt->CompressionAlgorithms[0];
660 static int decode_encrypt_ctx(struct TCP_Server_Info *server,
661 struct smb2_encryption_neg_context *ctxt)
663 unsigned int len = le16_to_cpu(ctxt->DataLength);
665 cifs_dbg(FYI, "decode SMB3.11 encryption neg context of len %d\n", len);
667 * Caller checked that DataLength remains within SMB boundary. We still
668 * need to confirm that one Cipher flexible array member is accounted
671 if (len < MIN_ENCRYPT_CTXT_DATA_LEN) {
672 pr_warn_once("server sent bad crypto ctxt len\n");
676 if (le16_to_cpu(ctxt->CipherCount) != 1) {
677 pr_warn_once("Invalid SMB3.11 cipher count\n");
680 cifs_dbg(FYI, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt->Ciphers[0]));
681 if (require_gcm_256) {
682 if (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES256_GCM) {
683 cifs_dbg(VFS, "Server does not support requested encryption type (AES256 GCM)\n");
686 } else if (ctxt->Ciphers[0] == 0) {
688 * e.g. if server only supported AES256_CCM (very unlikely)
689 * or server supported no encryption types or had all disabled.
690 * Since GLOBAL_CAP_ENCRYPTION will be not set, in the case
691 * in which mount requested encryption ("seal") checks later
692 * on during tree connection will return proper rc, but if
693 * seal not requested by client, since server is allowed to
694 * return 0 to indicate no supported cipher, we can't fail here
696 server->cipher_type = 0;
697 server->capabilities &= ~SMB2_GLOBAL_CAP_ENCRYPTION;
698 pr_warn_once("Server does not support requested encryption types\n");
700 } else if ((ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_CCM) &&
701 (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_GCM) &&
702 (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES256_GCM)) {
703 /* server returned a cipher we didn't ask for */
704 pr_warn_once("Invalid SMB3.11 cipher returned\n");
707 server->cipher_type = ctxt->Ciphers[0];
708 server->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
712 static void decode_signing_ctx(struct TCP_Server_Info *server,
713 struct smb2_signing_capabilities *pctxt)
715 unsigned int len = le16_to_cpu(pctxt->DataLength);
718 * Caller checked that DataLength remains within SMB boundary. We still
719 * need to confirm that one SigningAlgorithms flexible array member is
722 if ((len < 4) || (len > 16)) {
723 pr_warn_once("server sent bad signing negcontext\n");
726 if (le16_to_cpu(pctxt->SigningAlgorithmCount) != 1) {
727 pr_warn_once("Invalid signing algorithm count\n");
730 if (le16_to_cpu(pctxt->SigningAlgorithms[0]) > 2) {
731 pr_warn_once("unknown signing algorithm\n");
735 server->signing_negotiated = true;
736 server->signing_algorithm = le16_to_cpu(pctxt->SigningAlgorithms[0]);
737 cifs_dbg(FYI, "signing algorithm %d chosen\n",
738 server->signing_algorithm);
742 static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp,
743 struct TCP_Server_Info *server,
744 unsigned int len_of_smb)
746 struct smb2_neg_context *pctx;
747 unsigned int offset = le32_to_cpu(rsp->NegotiateContextOffset);
748 unsigned int ctxt_cnt = le16_to_cpu(rsp->NegotiateContextCount);
749 unsigned int len_of_ctxts, i;
752 cifs_dbg(FYI, "decoding %d negotiate contexts\n", ctxt_cnt);
753 if (len_of_smb <= offset) {
754 cifs_server_dbg(VFS, "Invalid response: negotiate context offset\n");
758 len_of_ctxts = len_of_smb - offset;
760 for (i = 0; i < ctxt_cnt; i++) {
762 /* check that offset is not beyond end of SMB */
763 if (len_of_ctxts < sizeof(struct smb2_neg_context))
766 pctx = (struct smb2_neg_context *)(offset + (char *)rsp);
767 clen = sizeof(struct smb2_neg_context)
768 + le16_to_cpu(pctx->DataLength);
770 * 2.2.4 SMB2 NEGOTIATE Response
771 * Subsequent negotiate contexts MUST appear at the first 8-byte
772 * aligned offset following the previous negotiate context.
774 if (i + 1 != ctxt_cnt)
775 clen = ALIGN(clen, 8);
776 if (clen > len_of_ctxts)
779 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES)
780 decode_preauth_context(
781 (struct smb2_preauth_neg_context *)pctx);
782 else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES)
783 rc = decode_encrypt_ctx(server,
784 (struct smb2_encryption_neg_context *)pctx);
785 else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES)
786 decode_compress_ctx(server,
787 (struct smb2_compression_capabilities_context *)pctx);
788 else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE)
789 server->posix_ext_supported = true;
790 else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES)
791 decode_signing_ctx(server,
792 (struct smb2_signing_capabilities *)pctx);
794 cifs_server_dbg(VFS, "unknown negcontext of type %d ignored\n",
795 le16_to_cpu(pctx->ContextType));
800 len_of_ctxts -= clen;
805 static struct create_posix *
806 create_posix_buf(umode_t mode)
808 struct create_posix *buf;
810 buf = kzalloc(sizeof(struct create_posix),
815 buf->ccontext.DataOffset =
816 cpu_to_le16(offsetof(struct create_posix, Mode));
817 buf->ccontext.DataLength = cpu_to_le32(4);
818 buf->ccontext.NameOffset =
819 cpu_to_le16(offsetof(struct create_posix, Name));
820 buf->ccontext.NameLength = cpu_to_le16(16);
822 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
833 buf->Name[10] = 0x83;
834 buf->Name[11] = 0xDE;
835 buf->Name[12] = 0x96;
836 buf->Name[13] = 0x8B;
837 buf->Name[14] = 0xCD;
838 buf->Name[15] = 0x7C;
839 buf->Mode = cpu_to_le32(mode);
840 cifs_dbg(FYI, "mode on posix create 0%o\n", mode);
845 add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode)
847 unsigned int num = *num_iovec;
849 iov[num].iov_base = create_posix_buf(mode);
850 if (mode == ACL_NO_MODE)
851 cifs_dbg(FYI, "Invalid mode\n");
852 if (iov[num].iov_base == NULL)
854 iov[num].iov_len = sizeof(struct create_posix);
855 *num_iovec = num + 1;
862 * SMB2 Worker functions follow:
864 * The general structure of the worker functions is:
865 * 1) Call smb2_init (assembles SMB2 header)
866 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
867 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
868 * 4) Decode SMB2 command specific fields in the fixed length area
869 * 5) Decode variable length data area (if any for this SMB2 command type)
870 * 6) Call free smb buffer
876 SMB2_negotiate(const unsigned int xid,
877 struct cifs_ses *ses,
878 struct TCP_Server_Info *server)
880 struct smb_rqst rqst;
881 struct smb2_negotiate_req *req;
882 struct smb2_negotiate_rsp *rsp;
887 int blob_offset, blob_length;
889 int flags = CIFS_NEG_OP;
890 unsigned int total_len;
892 cifs_dbg(FYI, "Negotiate protocol\n");
895 WARN(1, "%s: server is NULL!\n", __func__);
899 rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, server,
900 (void **) &req, &total_len);
904 req->hdr.SessionId = 0;
906 memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
907 memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
909 if (strcmp(server->vals->version_string,
910 SMB3ANY_VERSION_STRING) == 0) {
911 req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
912 req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
913 req->Dialects[2] = cpu_to_le16(SMB311_PROT_ID);
914 req->DialectCount = cpu_to_le16(3);
916 } else if (strcmp(server->vals->version_string,
917 SMBDEFAULT_VERSION_STRING) == 0) {
918 req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
919 req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
920 req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
921 req->Dialects[3] = cpu_to_le16(SMB311_PROT_ID);
922 req->DialectCount = cpu_to_le16(4);
925 /* otherwise send specific dialect */
926 req->Dialects[0] = cpu_to_le16(server->vals->protocol_id);
927 req->DialectCount = cpu_to_le16(1);
931 /* only one of SMB2 signing flags may be set in SMB2 request */
933 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
934 else if (global_secflags & CIFSSEC_MAY_SIGN)
935 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
937 req->SecurityMode = 0;
939 req->Capabilities = cpu_to_le32(server->vals->req_capabilities);
940 if (ses->chan_max > 1)
941 req->Capabilities |= cpu_to_le32(SMB2_GLOBAL_CAP_MULTI_CHANNEL);
943 /* ClientGUID must be zero for SMB2.02 dialect */
944 if (server->vals->protocol_id == SMB20_PROT_ID)
945 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
947 memcpy(req->ClientGUID, server->client_guid,
948 SMB2_CLIENT_GUID_SIZE);
949 if ((server->vals->protocol_id == SMB311_PROT_ID) ||
950 (strcmp(server->vals->version_string,
951 SMB3ANY_VERSION_STRING) == 0) ||
952 (strcmp(server->vals->version_string,
953 SMBDEFAULT_VERSION_STRING) == 0))
954 assemble_neg_contexts(req, server, &total_len);
956 iov[0].iov_base = (char *)req;
957 iov[0].iov_len = total_len;
959 memset(&rqst, 0, sizeof(struct smb_rqst));
963 rc = cifs_send_recv(xid, ses, server,
964 &rqst, &resp_buftype, flags, &rsp_iov);
965 cifs_small_buf_release(req);
966 rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base;
968 * No tcon so can't do
969 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
971 if (rc == -EOPNOTSUPP) {
972 cifs_server_dbg(VFS, "Dialect not supported by server. Consider specifying vers=1.0 or vers=2.0 on mount for accessing older servers\n");
978 if (strcmp(server->vals->version_string,
979 SMB3ANY_VERSION_STRING) == 0) {
980 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
982 "SMB2 dialect returned but not requested\n");
984 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
986 "SMB2.1 dialect returned but not requested\n");
988 } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
989 /* ops set to 3.0 by default for default so update */
990 server->ops = &smb311_operations;
991 server->vals = &smb311_values;
993 } else if (strcmp(server->vals->version_string,
994 SMBDEFAULT_VERSION_STRING) == 0) {
995 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
997 "SMB2 dialect returned but not requested\n");
999 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
1000 /* ops set to 3.0 by default for default so update */
1001 server->ops = &smb21_operations;
1002 server->vals = &smb21_values;
1003 } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
1004 server->ops = &smb311_operations;
1005 server->vals = &smb311_values;
1007 } else if (le16_to_cpu(rsp->DialectRevision) !=
1008 server->vals->protocol_id) {
1009 /* if requested single dialect ensure returned dialect matched */
1010 cifs_server_dbg(VFS, "Invalid 0x%x dialect returned: not requested\n",
1011 le16_to_cpu(rsp->DialectRevision));
1015 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
1017 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
1018 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
1019 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
1020 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
1021 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
1022 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
1023 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
1024 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
1025 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
1026 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
1028 cifs_server_dbg(VFS, "Invalid dialect returned by server 0x%x\n",
1029 le16_to_cpu(rsp->DialectRevision));
1034 server->dialect = le16_to_cpu(rsp->DialectRevision);
1037 * Keep a copy of the hash after negprot. This hash will be
1038 * the starting hash value for all sessions made from this
1041 memcpy(server->preauth_sha_hash, ses->preauth_sha_hash,
1042 SMB2_PREAUTH_HASH_SIZE);
1044 /* SMB2 only has an extended negflavor */
1045 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
1046 /* set it to the maximum buffer size value we can send with 1 credit */
1047 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
1048 SMB2_MAX_BUFFER_SIZE);
1049 server->max_read = le32_to_cpu(rsp->MaxReadSize);
1050 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
1051 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
1052 if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode)
1053 cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n",
1055 server->capabilities = le32_to_cpu(rsp->Capabilities);
1056 /* Internal types */
1057 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
1060 * SMB3.0 supports only 1 cipher and doesn't have a encryption neg context
1061 * Set the cipher type manually.
1063 if (server->dialect == SMB30_PROT_ID && (server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
1064 server->cipher_type = SMB2_ENCRYPTION_AES128_CCM;
1066 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
1067 (struct smb2_hdr *)rsp);
1069 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
1071 * ses->sectype = RawNTLMSSP;
1072 * but for time being this is our only auth choice so doesn't matter.
1073 * We just found a server which sets blob length to zero expecting raw.
1075 if (blob_length == 0) {
1076 cifs_dbg(FYI, "missing security blob on negprot\n");
1077 server->sec_ntlmssp = true;
1080 rc = cifs_enable_signing(server, ses->sign);
1084 rc = decode_negTokenInit(security_blob, blob_length, server);
1091 if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
1092 if (rsp->NegotiateContextCount)
1093 rc = smb311_decode_neg_context(rsp, server,
1096 cifs_server_dbg(VFS, "Missing expected negotiate contexts\n");
1099 free_rsp_buf(resp_buftype, rsp);
1103 int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
1106 struct validate_negotiate_info_req *pneg_inbuf;
1107 struct validate_negotiate_info_rsp *pneg_rsp = NULL;
1109 u32 inbuflen; /* max of 4 dialects */
1110 struct TCP_Server_Info *server = tcon->ses->server;
1112 cifs_dbg(FYI, "validate negotiate\n");
1114 /* In SMB3.11 preauth integrity supersedes validate negotiate */
1115 if (server->dialect == SMB311_PROT_ID)
1119 * validation ioctl must be signed, so no point sending this if we
1120 * can not sign it (ie are not known user). Even if signing is not
1121 * required (enabled but not negotiated), in those cases we selectively
1122 * sign just this, the first and only signed request on a connection.
1123 * Having validation of negotiate info helps reduce attack vectors.
1125 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
1126 return 0; /* validation requires signing */
1128 if (tcon->ses->user_name == NULL) {
1129 cifs_dbg(FYI, "Can't validate negotiate: null user mount\n");
1130 return 0; /* validation requires signing */
1133 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
1134 cifs_tcon_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n");
1136 pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS);
1140 pneg_inbuf->Capabilities =
1141 cpu_to_le32(server->vals->req_capabilities);
1142 if (tcon->ses->chan_max > 1)
1143 pneg_inbuf->Capabilities |= cpu_to_le32(SMB2_GLOBAL_CAP_MULTI_CHANNEL);
1145 memcpy(pneg_inbuf->Guid, server->client_guid,
1146 SMB2_CLIENT_GUID_SIZE);
1148 if (tcon->ses->sign)
1149 pneg_inbuf->SecurityMode =
1150 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
1151 else if (global_secflags & CIFSSEC_MAY_SIGN)
1152 pneg_inbuf->SecurityMode =
1153 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
1155 pneg_inbuf->SecurityMode = 0;
1158 if (strcmp(server->vals->version_string,
1159 SMB3ANY_VERSION_STRING) == 0) {
1160 pneg_inbuf->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
1161 pneg_inbuf->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
1162 pneg_inbuf->Dialects[2] = cpu_to_le16(SMB311_PROT_ID);
1163 pneg_inbuf->DialectCount = cpu_to_le16(3);
1164 /* SMB 2.1 not included so subtract one dialect from len */
1165 inbuflen = sizeof(*pneg_inbuf) -
1166 (sizeof(pneg_inbuf->Dialects[0]));
1167 } else if (strcmp(server->vals->version_string,
1168 SMBDEFAULT_VERSION_STRING) == 0) {
1169 pneg_inbuf->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
1170 pneg_inbuf->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
1171 pneg_inbuf->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
1172 pneg_inbuf->Dialects[3] = cpu_to_le16(SMB311_PROT_ID);
1173 pneg_inbuf->DialectCount = cpu_to_le16(4);
1174 /* structure is big enough for 4 dialects */
1175 inbuflen = sizeof(*pneg_inbuf);
1177 /* otherwise specific dialect was requested */
1178 pneg_inbuf->Dialects[0] =
1179 cpu_to_le16(server->vals->protocol_id);
1180 pneg_inbuf->DialectCount = cpu_to_le16(1);
1181 /* structure is big enough for 4 dialects, sending only 1 */
1182 inbuflen = sizeof(*pneg_inbuf) -
1183 sizeof(pneg_inbuf->Dialects[0]) * 3;
1186 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1187 FSCTL_VALIDATE_NEGOTIATE_INFO,
1188 (char *)pneg_inbuf, inbuflen, CIFSMaxBufSize,
1189 (char **)&pneg_rsp, &rsplen);
1190 if (rc == -EOPNOTSUPP) {
1192 * Old Windows versions or Netapp SMB server can return
1193 * not supported error. Client should accept it.
1195 cifs_tcon_dbg(VFS, "Server does not support validate negotiate\n");
1197 goto out_free_inbuf;
1198 } else if (rc != 0) {
1199 cifs_tcon_dbg(VFS, "validate protocol negotiate failed: %d\n",
1202 goto out_free_inbuf;
1206 if (rsplen != sizeof(*pneg_rsp)) {
1207 cifs_tcon_dbg(VFS, "Invalid protocol negotiate response size: %d\n",
1210 /* relax check since Mac returns max bufsize allowed on ioctl */
1211 if (rsplen > CIFSMaxBufSize || rsplen < sizeof(*pneg_rsp))
1215 /* check validate negotiate info response matches what we got earlier */
1216 if (pneg_rsp->Dialect != cpu_to_le16(server->dialect))
1219 if (pneg_rsp->SecurityMode != cpu_to_le16(server->sec_mode))
1222 /* do not validate server guid because not saved at negprot time yet */
1224 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
1225 SMB2_LARGE_FILES) != server->capabilities)
1228 /* validate negotiate successful */
1230 cifs_dbg(FYI, "validate negotiate info successful\n");
1234 cifs_tcon_dbg(VFS, "protocol revalidation - security settings mismatch\n");
1243 smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
1245 switch (requested) {
1252 if (server->sec_ntlmssp &&
1253 (global_secflags & CIFSSEC_MAY_NTLMSSP))
1255 if ((server->sec_kerberos || server->sec_mskerberos) &&
1256 (global_secflags & CIFSSEC_MAY_KRB5))
1264 struct SMB2_sess_data {
1266 struct cifs_ses *ses;
1267 struct TCP_Server_Info *server;
1268 struct nls_table *nls_cp;
1269 void (*func)(struct SMB2_sess_data *);
1271 u64 previous_session;
1273 /* we will send the SMB in three pieces:
1274 * a fixed length beginning part, an optional
1275 * SPNEGO blob (which can be zero length), and a
1276 * last part which will include the strings
1277 * and rest of bcc area. This allows us to avoid
1278 * a large buffer 17K allocation
1285 SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
1288 struct cifs_ses *ses = sess_data->ses;
1289 struct TCP_Server_Info *server = sess_data->server;
1290 struct smb2_sess_setup_req *req;
1291 unsigned int total_len;
1292 bool is_binding = false;
1294 rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, server,
1300 spin_lock(&ses->ses_lock);
1301 is_binding = (ses->ses_status == SES_GOOD);
1302 spin_unlock(&ses->ses_lock);
1305 req->hdr.SessionId = cpu_to_le64(ses->Suid);
1306 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
1307 req->PreviousSessionId = 0;
1308 req->Flags = SMB2_SESSION_REQ_FLAG_BINDING;
1309 cifs_dbg(FYI, "Binding to sess id: %llx\n", ses->Suid);
1311 /* First session, not a reauthenticate */
1312 req->hdr.SessionId = 0;
1314 * if reconnect, we need to send previous sess id
1317 req->PreviousSessionId = cpu_to_le64(sess_data->previous_session);
1318 req->Flags = 0; /* MBZ */
1319 cifs_dbg(FYI, "Fresh session. Previous: %llx\n",
1320 sess_data->previous_session);
1323 /* enough to enable echos and oplocks and one max size write */
1324 if (server->credits >= server->max_credits)
1325 req->hdr.CreditRequest = cpu_to_le16(0);
1327 req->hdr.CreditRequest = cpu_to_le16(
1328 min_t(int, server->max_credits -
1329 server->credits, 130));
1331 /* only one of SMB2 signing flags may be set in SMB2 request */
1333 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
1334 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
1335 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
1337 req->SecurityMode = 0;
1339 #ifdef CONFIG_CIFS_DFS_UPCALL
1340 req->Capabilities = cpu_to_le32(SMB2_GLOBAL_CAP_DFS);
1342 req->Capabilities = 0;
1343 #endif /* DFS_UPCALL */
1345 req->Channel = 0; /* MBZ */
1347 sess_data->iov[0].iov_base = (char *)req;
1349 sess_data->iov[0].iov_len = total_len - 1;
1351 * This variable will be used to clear the buffer
1352 * allocated above in case of any error in the calling function.
1354 sess_data->buf0_type = CIFS_SMALL_BUFFER;
1360 SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
1362 struct kvec *iov = sess_data->iov;
1364 /* iov[1] is already freed by caller */
1365 if (sess_data->buf0_type != CIFS_NO_BUFFER && iov[0].iov_base)
1366 memzero_explicit(iov[0].iov_base, iov[0].iov_len);
1368 free_rsp_buf(sess_data->buf0_type, iov[0].iov_base);
1369 sess_data->buf0_type = CIFS_NO_BUFFER;
1373 SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
1376 struct smb_rqst rqst;
1377 struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
1378 struct kvec rsp_iov = { NULL, 0 };
1380 /* Testing shows that buffer offset must be at location of Buffer[0] */
1381 req->SecurityBufferOffset =
1382 cpu_to_le16(sizeof(struct smb2_sess_setup_req));
1383 req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
1385 memset(&rqst, 0, sizeof(struct smb_rqst));
1386 rqst.rq_iov = sess_data->iov;
1389 /* BB add code to build os and lm fields */
1390 rc = cifs_send_recv(sess_data->xid, sess_data->ses,
1393 &sess_data->buf0_type,
1394 CIFS_LOG_ERROR | CIFS_SESS_OP, &rsp_iov);
1395 cifs_small_buf_release(sess_data->iov[0].iov_base);
1396 memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
1402 SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
1405 struct cifs_ses *ses = sess_data->ses;
1406 struct TCP_Server_Info *server = sess_data->server;
1408 cifs_server_lock(server);
1409 if (server->ops->generate_signingkey) {
1410 rc = server->ops->generate_signingkey(ses, server);
1413 "SMB3 session key generation failed\n");
1414 cifs_server_unlock(server);
1418 if (!server->session_estab) {
1419 server->sequence_number = 0x2;
1420 server->session_estab = true;
1422 cifs_server_unlock(server);
1424 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
1428 #ifdef CONFIG_CIFS_UPCALL
1430 SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1433 struct cifs_ses *ses = sess_data->ses;
1434 struct TCP_Server_Info *server = sess_data->server;
1435 struct cifs_spnego_msg *msg;
1436 struct key *spnego_key = NULL;
1437 struct smb2_sess_setup_rsp *rsp = NULL;
1438 bool is_binding = false;
1440 rc = SMB2_sess_alloc_buffer(sess_data);
1444 spnego_key = cifs_get_spnego_key(ses, server);
1445 if (IS_ERR(spnego_key)) {
1446 rc = PTR_ERR(spnego_key);
1448 cifs_dbg(VFS, "Verify user has a krb5 ticket and keyutils is installed\n");
1453 msg = spnego_key->payload.data[0];
1455 * check version field to make sure that cifs.upcall is
1456 * sending us a response in an expected form
1458 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
1459 cifs_dbg(VFS, "bad cifs.upcall version. Expected %d got %d\n",
1460 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
1462 goto out_put_spnego_key;
1465 spin_lock(&ses->ses_lock);
1466 is_binding = (ses->ses_status == SES_GOOD);
1467 spin_unlock(&ses->ses_lock);
1469 /* keep session key if binding */
1471 kfree_sensitive(ses->auth_key.response);
1472 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
1474 if (!ses->auth_key.response) {
1475 cifs_dbg(VFS, "Kerberos can't allocate (%u bytes) memory\n",
1478 goto out_put_spnego_key;
1480 ses->auth_key.len = msg->sesskey_len;
1483 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
1484 sess_data->iov[1].iov_len = msg->secblob_len;
1486 rc = SMB2_sess_sendreceive(sess_data);
1488 goto out_put_spnego_key;
1490 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1491 /* keep session id and flags if binding */
1493 ses->Suid = le64_to_cpu(rsp->hdr.SessionId);
1494 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
1497 rc = SMB2_sess_establish_session(sess_data);
1499 key_invalidate(spnego_key);
1500 key_put(spnego_key);
1502 kfree_sensitive(ses->auth_key.response);
1503 ses->auth_key.response = NULL;
1504 ses->auth_key.len = 0;
1507 sess_data->result = rc;
1508 sess_data->func = NULL;
1509 SMB2_sess_free_buffer(sess_data);
1513 SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1515 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
1516 sess_data->result = -EOPNOTSUPP;
1517 sess_data->func = NULL;
1522 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
1525 SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
1528 struct cifs_ses *ses = sess_data->ses;
1529 struct TCP_Server_Info *server = sess_data->server;
1530 struct smb2_sess_setup_rsp *rsp = NULL;
1531 unsigned char *ntlmssp_blob = NULL;
1532 bool use_spnego = false; /* else use raw ntlmssp */
1533 u16 blob_length = 0;
1534 bool is_binding = false;
1537 * If memory allocation is successful, caller of this function
1540 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
1541 if (!ses->ntlmssp) {
1545 ses->ntlmssp->sesskey_per_smbsess = true;
1547 rc = SMB2_sess_alloc_buffer(sess_data);
1551 rc = build_ntlmssp_smb3_negotiate_blob(&ntlmssp_blob,
1552 &blob_length, ses, server,
1558 /* BB eventually need to add this */
1559 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1563 sess_data->iov[1].iov_base = ntlmssp_blob;
1564 sess_data->iov[1].iov_len = blob_length;
1566 rc = SMB2_sess_sendreceive(sess_data);
1567 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1569 /* If true, rc here is expected and not an error */
1570 if (sess_data->buf0_type != CIFS_NO_BUFFER &&
1571 rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
1577 if (offsetof(struct smb2_sess_setup_rsp, Buffer) !=
1578 le16_to_cpu(rsp->SecurityBufferOffset)) {
1579 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
1580 le16_to_cpu(rsp->SecurityBufferOffset));
1584 rc = decode_ntlmssp_challenge(rsp->Buffer,
1585 le16_to_cpu(rsp->SecurityBufferLength), ses);
1589 cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
1591 spin_lock(&ses->ses_lock);
1592 is_binding = (ses->ses_status == SES_GOOD);
1593 spin_unlock(&ses->ses_lock);
1595 /* keep existing ses id and flags if binding */
1597 ses->Suid = le64_to_cpu(rsp->hdr.SessionId);
1598 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
1602 kfree_sensitive(ntlmssp_blob);
1603 SMB2_sess_free_buffer(sess_data);
1605 sess_data->result = 0;
1606 sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
1610 kfree_sensitive(ses->ntlmssp);
1611 ses->ntlmssp = NULL;
1612 sess_data->result = rc;
1613 sess_data->func = NULL;
1617 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
1620 struct cifs_ses *ses = sess_data->ses;
1621 struct TCP_Server_Info *server = sess_data->server;
1622 struct smb2_sess_setup_req *req;
1623 struct smb2_sess_setup_rsp *rsp = NULL;
1624 unsigned char *ntlmssp_blob = NULL;
1625 bool use_spnego = false; /* else use raw ntlmssp */
1626 u16 blob_length = 0;
1627 bool is_binding = false;
1629 rc = SMB2_sess_alloc_buffer(sess_data);
1633 req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
1634 req->hdr.SessionId = cpu_to_le64(ses->Suid);
1636 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length,
1640 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
1645 /* BB eventually need to add this */
1646 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1650 sess_data->iov[1].iov_base = ntlmssp_blob;
1651 sess_data->iov[1].iov_len = blob_length;
1653 rc = SMB2_sess_sendreceive(sess_data);
1657 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1659 spin_lock(&ses->ses_lock);
1660 is_binding = (ses->ses_status == SES_GOOD);
1661 spin_unlock(&ses->ses_lock);
1663 /* keep existing ses id and flags if binding */
1665 ses->Suid = le64_to_cpu(rsp->hdr.SessionId);
1666 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
1669 rc = SMB2_sess_establish_session(sess_data);
1670 #ifdef CONFIG_CIFS_DEBUG_DUMP_KEYS
1671 if (ses->server->dialect < SMB30_PROT_ID) {
1672 cifs_dbg(VFS, "%s: dumping generated SMB2 session keys\n", __func__);
1674 * The session id is opaque in terms of endianness, so we can't
1675 * print it as a long long. we dump it as we got it on the wire
1677 cifs_dbg(VFS, "Session Id %*ph\n", (int)sizeof(ses->Suid),
1679 cifs_dbg(VFS, "Session Key %*ph\n",
1680 SMB2_NTLMV2_SESSKEY_SIZE, ses->auth_key.response);
1681 cifs_dbg(VFS, "Signing Key %*ph\n",
1682 SMB3_SIGN_KEY_SIZE, ses->auth_key.response);
1686 kfree_sensitive(ntlmssp_blob);
1687 SMB2_sess_free_buffer(sess_data);
1688 kfree_sensitive(ses->ntlmssp);
1689 ses->ntlmssp = NULL;
1690 sess_data->result = rc;
1691 sess_data->func = NULL;
1695 SMB2_select_sec(struct SMB2_sess_data *sess_data)
1698 struct cifs_ses *ses = sess_data->ses;
1699 struct TCP_Server_Info *server = sess_data->server;
1701 type = smb2_select_sectype(server, ses->sectype);
1702 cifs_dbg(FYI, "sess setup type %d\n", type);
1703 if (type == Unspecified) {
1704 cifs_dbg(VFS, "Unable to select appropriate authentication method!\n");
1710 sess_data->func = SMB2_auth_kerberos;
1713 sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
1716 cifs_dbg(VFS, "secType %d not supported!\n", type);
1724 SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
1725 struct TCP_Server_Info *server,
1726 const struct nls_table *nls_cp)
1729 struct SMB2_sess_data *sess_data;
1731 cifs_dbg(FYI, "Session Setup\n");
1734 WARN(1, "%s: server is NULL!\n", __func__);
1738 sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
1742 sess_data->xid = xid;
1743 sess_data->ses = ses;
1744 sess_data->server = server;
1745 sess_data->buf0_type = CIFS_NO_BUFFER;
1746 sess_data->nls_cp = (struct nls_table *) nls_cp;
1747 sess_data->previous_session = ses->Suid;
1749 rc = SMB2_select_sec(sess_data);
1754 * Initialize the session hash with the server one.
1756 memcpy(ses->preauth_sha_hash, server->preauth_sha_hash,
1757 SMB2_PREAUTH_HASH_SIZE);
1759 while (sess_data->func)
1760 sess_data->func(sess_data);
1762 if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign))
1763 cifs_server_dbg(VFS, "signing requested but authenticated as guest\n");
1764 rc = sess_data->result;
1766 kfree_sensitive(sess_data);
1771 SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
1773 struct smb_rqst rqst;
1774 struct smb2_logoff_req *req; /* response is also trivial struct */
1776 struct TCP_Server_Info *server;
1778 unsigned int total_len;
1780 struct kvec rsp_iov;
1783 cifs_dbg(FYI, "disconnect session %p\n", ses);
1785 if (ses && (ses->server))
1786 server = ses->server;
1790 /* no need to send SMB logoff if uid already closed due to reconnect */
1791 spin_lock(&ses->chan_lock);
1792 if (CIFS_ALL_CHANS_NEED_RECONNECT(ses)) {
1793 spin_unlock(&ses->chan_lock);
1794 goto smb2_session_already_dead;
1796 spin_unlock(&ses->chan_lock);
1798 rc = smb2_plain_req_init(SMB2_LOGOFF, NULL, ses->server,
1799 (void **) &req, &total_len);
1803 /* since no tcon, smb2_init can not do this, so do here */
1804 req->hdr.SessionId = cpu_to_le64(ses->Suid);
1806 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
1807 flags |= CIFS_TRANSFORM_REQ;
1808 else if (server->sign)
1809 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
1811 flags |= CIFS_NO_RSP_BUF;
1813 iov[0].iov_base = (char *)req;
1814 iov[0].iov_len = total_len;
1816 memset(&rqst, 0, sizeof(struct smb_rqst));
1820 rc = cifs_send_recv(xid, ses, ses->server,
1821 &rqst, &resp_buf_type, flags, &rsp_iov);
1822 cifs_small_buf_release(req);
1824 * No tcon so can't do
1825 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1828 smb2_session_already_dead:
1832 static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
1834 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
1837 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1839 /* These are similar values to what Windows uses */
1840 static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
1842 tcon->max_chunks = 256;
1843 tcon->max_bytes_chunk = 1048576;
1844 tcon->max_bytes_copy = 16777216;
1848 SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
1849 struct cifs_tcon *tcon, const struct nls_table *cp)
1851 struct smb_rqst rqst;
1852 struct smb2_tree_connect_req *req;
1853 struct smb2_tree_connect_rsp *rsp = NULL;
1855 struct kvec rsp_iov = { NULL, 0 };
1859 __le16 *unc_path = NULL;
1861 unsigned int total_len;
1862 struct TCP_Server_Info *server;
1864 /* always use master channel */
1865 server = ses->server;
1867 cifs_dbg(FYI, "TCON\n");
1869 if (!server || !tree)
1872 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
1873 if (unc_path == NULL)
1876 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp);
1877 if (unc_path_len <= 0) {
1883 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
1885 atomic_set(&tcon->num_remote_opens, 0);
1886 rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, server,
1887 (void **) &req, &total_len);
1893 if (smb3_encryption_required(tcon))
1894 flags |= CIFS_TRANSFORM_REQ;
1896 iov[0].iov_base = (char *)req;
1898 iov[0].iov_len = total_len - 1;
1900 /* Testing shows that buffer offset must be at location of Buffer[0] */
1901 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req));
1902 req->PathLength = cpu_to_le16(unc_path_len);
1903 iov[1].iov_base = unc_path;
1904 iov[1].iov_len = unc_path_len;
1907 * 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1
1908 * unless it is guest or anonymous user. See MS-SMB2 3.2.5.3.1
1909 * (Samba servers don't always set the flag so also check if null user)
1911 if ((server->dialect == SMB311_PROT_ID) &&
1912 !smb3_encryption_required(tcon) &&
1913 !(ses->session_flags &
1914 (SMB2_SESSION_FLAG_IS_GUEST|SMB2_SESSION_FLAG_IS_NULL)) &&
1915 ((ses->user_name != NULL) || (ses->sectype == Kerberos)))
1916 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
1918 memset(&rqst, 0, sizeof(struct smb_rqst));
1922 /* Need 64 for max size write so ask for more in case not there yet */
1923 if (server->credits >= server->max_credits)
1924 req->hdr.CreditRequest = cpu_to_le16(0);
1926 req->hdr.CreditRequest = cpu_to_le16(
1927 min_t(int, server->max_credits -
1928 server->credits, 64));
1930 rc = cifs_send_recv(xid, ses, server,
1931 &rqst, &resp_buftype, flags, &rsp_iov);
1932 cifs_small_buf_release(req);
1933 rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
1934 trace_smb3_tcon(xid, tcon->tid, ses->Suid, tree, rc);
1935 if ((rc != 0) || (rsp == NULL)) {
1936 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
1937 tcon->need_reconnect = true;
1938 goto tcon_error_exit;
1941 switch (rsp->ShareType) {
1942 case SMB2_SHARE_TYPE_DISK:
1943 cifs_dbg(FYI, "connection to disk share\n");
1945 case SMB2_SHARE_TYPE_PIPE:
1947 cifs_dbg(FYI, "connection to pipe share\n");
1949 case SMB2_SHARE_TYPE_PRINT:
1951 cifs_dbg(FYI, "connection to printer\n");
1954 cifs_server_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
1956 goto tcon_error_exit;
1959 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
1960 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
1961 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1962 tcon->tid = le32_to_cpu(rsp->hdr.Id.SyncId.TreeId);
1963 strscpy(tcon->tree_name, tree, sizeof(tcon->tree_name));
1965 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1966 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
1967 cifs_tcon_dbg(VFS, "DFS capability contradicts DFS flag\n");
1970 !(server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
1971 cifs_tcon_dbg(VFS, "Encryption is requested but not supported\n");
1973 init_copy_chunk_defaults(tcon);
1974 if (server->ops->validate_negotiate)
1975 rc = server->ops->validate_negotiate(xid, tcon);
1976 if (rc == 0) /* See MS-SMB2 2.2.10 and 3.2.5.5 */
1977 if (tcon->share_flags & SMB2_SHAREFLAG_ISOLATED_TRANSPORT)
1978 server->nosharesock = true;
1981 free_rsp_buf(resp_buftype, rsp);
1986 if (rsp && rsp->hdr.Status == STATUS_BAD_NETWORK_NAME)
1987 cifs_tcon_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
1992 SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1994 struct smb_rqst rqst;
1995 struct smb2_tree_disconnect_req *req; /* response is trivial */
1997 struct cifs_ses *ses = tcon->ses;
1999 unsigned int total_len;
2001 struct kvec rsp_iov;
2004 cifs_dbg(FYI, "Tree Disconnect\n");
2006 if (!ses || !(ses->server))
2009 trace_smb3_tdis_enter(xid, tcon->tid, ses->Suid, tcon->tree_name);
2010 spin_lock(&ses->chan_lock);
2011 if ((tcon->need_reconnect) ||
2012 (CIFS_ALL_CHANS_NEED_RECONNECT(tcon->ses))) {
2013 spin_unlock(&ses->chan_lock);
2016 spin_unlock(&ses->chan_lock);
2018 invalidate_all_cached_dirs(tcon);
2020 rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, ses->server,
2026 if (smb3_encryption_required(tcon))
2027 flags |= CIFS_TRANSFORM_REQ;
2029 flags |= CIFS_NO_RSP_BUF;
2031 iov[0].iov_base = (char *)req;
2032 iov[0].iov_len = total_len;
2034 memset(&rqst, 0, sizeof(struct smb_rqst));
2038 rc = cifs_send_recv(xid, ses, ses->server,
2039 &rqst, &resp_buf_type, flags, &rsp_iov);
2040 cifs_small_buf_release(req);
2042 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
2043 trace_smb3_tdis_err(xid, tcon->tid, ses->Suid, rc);
2045 trace_smb3_tdis_done(xid, tcon->tid, ses->Suid);
2051 static struct create_durable *
2052 create_durable_buf(void)
2054 struct create_durable *buf;
2056 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
2060 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2061 (struct create_durable, Data));
2062 buf->ccontext.DataLength = cpu_to_le32(16);
2063 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2064 (struct create_durable, Name));
2065 buf->ccontext.NameLength = cpu_to_le16(4);
2066 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
2074 static struct create_durable *
2075 create_reconnect_durable_buf(struct cifs_fid *fid)
2077 struct create_durable *buf;
2079 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
2083 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2084 (struct create_durable, Data));
2085 buf->ccontext.DataLength = cpu_to_le32(16);
2086 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2087 (struct create_durable, Name));
2088 buf->ccontext.NameLength = cpu_to_le16(4);
2089 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
2090 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
2091 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
2100 parse_query_id_ctxt(struct create_context *cc, struct smb2_file_all_info *buf)
2102 struct create_disk_id_rsp *pdisk_id = (struct create_disk_id_rsp *)cc;
2104 cifs_dbg(FYI, "parse query id context 0x%llx 0x%llx\n",
2105 pdisk_id->DiskFileId, pdisk_id->VolumeId);
2106 buf->IndexNumber = pdisk_id->DiskFileId;
2110 parse_posix_ctxt(struct create_context *cc, struct smb2_file_all_info *info,
2111 struct create_posix_rsp *posix)
2114 u8 *beg = (u8 *)cc + le16_to_cpu(cc->DataOffset);
2115 u8 *end = beg + le32_to_cpu(cc->DataLength);
2118 memset(posix, 0, sizeof(*posix));
2120 posix->nlink = le32_to_cpu(*(__le32 *)(beg + 0));
2121 posix->reparse_tag = le32_to_cpu(*(__le32 *)(beg + 4));
2122 posix->mode = le32_to_cpu(*(__le32 *)(beg + 8));
2125 sid_len = posix_info_sid_size(sid, end);
2127 cifs_dbg(VFS, "bad owner sid in posix create response\n");
2130 memcpy(&posix->owner, sid, sid_len);
2132 sid = sid + sid_len;
2133 sid_len = posix_info_sid_size(sid, end);
2135 cifs_dbg(VFS, "bad group sid in posix create response\n");
2138 memcpy(&posix->group, sid, sid_len);
2140 cifs_dbg(FYI, "nlink=%d mode=%o reparse_tag=%x\n",
2141 posix->nlink, posix->mode, posix->reparse_tag);
2145 smb2_parse_contexts(struct TCP_Server_Info *server,
2146 struct smb2_create_rsp *rsp,
2147 unsigned int *epoch, char *lease_key, __u8 *oplock,
2148 struct smb2_file_all_info *buf,
2149 struct create_posix_rsp *posix)
2152 struct create_context *cc;
2154 unsigned int remaining;
2156 static const char smb3_create_tag_posix[] = {
2157 0x93, 0xAD, 0x25, 0x50, 0x9C,
2158 0xB4, 0x11, 0xE7, 0xB4, 0x23, 0x83,
2159 0xDE, 0x96, 0x8B, 0xCD, 0x7C
2163 data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset);
2164 remaining = le32_to_cpu(rsp->CreateContextsLength);
2165 cc = (struct create_context *)data_offset;
2167 /* Initialize inode number to 0 in case no valid data in qfid context */
2169 buf->IndexNumber = 0;
2171 while (remaining >= sizeof(struct create_context)) {
2172 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
2173 if (le16_to_cpu(cc->NameLength) == 4 &&
2174 strncmp(name, SMB2_CREATE_REQUEST_LEASE, 4) == 0)
2175 *oplock = server->ops->parse_lease_buf(cc, epoch,
2177 else if (buf && (le16_to_cpu(cc->NameLength) == 4) &&
2178 strncmp(name, SMB2_CREATE_QUERY_ON_DISK_ID, 4) == 0)
2179 parse_query_id_ctxt(cc, buf);
2180 else if ((le16_to_cpu(cc->NameLength) == 16)) {
2182 memcmp(name, smb3_create_tag_posix, 16) == 0)
2183 parse_posix_ctxt(cc, buf, posix);
2186 cifs_dbg(FYI, "Context not matched with len %d\n",
2187 le16_to_cpu(cc->NameLength));
2188 cifs_dump_mem("Cctxt name: ", name, 4);
2191 next = le32_to_cpu(cc->Next);
2195 cc = (struct create_context *)((char *)cc + next);
2198 if (rsp->OplockLevel != SMB2_OPLOCK_LEVEL_LEASE)
2199 *oplock = rsp->OplockLevel;
2205 add_lease_context(struct TCP_Server_Info *server,
2206 struct smb2_create_req *req,
2208 unsigned int *num_iovec, u8 *lease_key, __u8 *oplock)
2210 unsigned int num = *num_iovec;
2212 iov[num].iov_base = server->ops->create_lease_buf(lease_key, *oplock);
2213 if (iov[num].iov_base == NULL)
2215 iov[num].iov_len = server->vals->create_lease_size;
2216 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
2217 *num_iovec = num + 1;
2221 static struct create_durable_v2 *
2222 create_durable_v2_buf(struct cifs_open_parms *oparms)
2224 struct cifs_fid *pfid = oparms->fid;
2225 struct create_durable_v2 *buf;
2227 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
2231 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2232 (struct create_durable_v2, dcontext));
2233 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
2234 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2235 (struct create_durable_v2, Name));
2236 buf->ccontext.NameLength = cpu_to_le16(4);
2239 * NB: Handle timeout defaults to 0, which allows server to choose
2240 * (most servers default to 120 seconds) and most clients default to 0.
2241 * This can be overridden at mount ("handletimeout=") if the user wants
2242 * a different persistent (or resilient) handle timeout for all opens
2243 * on a particular SMB3 mount.
2245 buf->dcontext.Timeout = cpu_to_le32(oparms->tcon->handle_timeout);
2246 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
2247 generate_random_uuid(buf->dcontext.CreateGuid);
2248 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
2250 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
2258 static struct create_durable_handle_reconnect_v2 *
2259 create_reconnect_durable_v2_buf(struct cifs_fid *fid)
2261 struct create_durable_handle_reconnect_v2 *buf;
2263 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
2268 buf->ccontext.DataOffset =
2269 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
2271 buf->ccontext.DataLength =
2272 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
2273 buf->ccontext.NameOffset =
2274 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
2276 buf->ccontext.NameLength = cpu_to_le16(4);
2278 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
2279 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
2280 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
2281 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
2283 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
2292 add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
2293 struct cifs_open_parms *oparms)
2295 unsigned int num = *num_iovec;
2297 iov[num].iov_base = create_durable_v2_buf(oparms);
2298 if (iov[num].iov_base == NULL)
2300 iov[num].iov_len = sizeof(struct create_durable_v2);
2301 *num_iovec = num + 1;
2306 add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
2307 struct cifs_open_parms *oparms)
2309 unsigned int num = *num_iovec;
2311 /* indicate that we don't need to relock the file */
2312 oparms->reconnect = false;
2314 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
2315 if (iov[num].iov_base == NULL)
2317 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
2318 *num_iovec = num + 1;
2323 add_durable_context(struct kvec *iov, unsigned int *num_iovec,
2324 struct cifs_open_parms *oparms, bool use_persistent)
2326 unsigned int num = *num_iovec;
2328 if (use_persistent) {
2329 if (oparms->reconnect)
2330 return add_durable_reconnect_v2_context(iov, num_iovec,
2333 return add_durable_v2_context(iov, num_iovec, oparms);
2336 if (oparms->reconnect) {
2337 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
2338 /* indicate that we don't need to relock the file */
2339 oparms->reconnect = false;
2341 iov[num].iov_base = create_durable_buf();
2342 if (iov[num].iov_base == NULL)
2344 iov[num].iov_len = sizeof(struct create_durable);
2345 *num_iovec = num + 1;
2349 /* See MS-SMB2 2.2.13.2.7 */
2350 static struct crt_twarp_ctxt *
2351 create_twarp_buf(__u64 timewarp)
2353 struct crt_twarp_ctxt *buf;
2355 buf = kzalloc(sizeof(struct crt_twarp_ctxt), GFP_KERNEL);
2359 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2360 (struct crt_twarp_ctxt, Timestamp));
2361 buf->ccontext.DataLength = cpu_to_le32(8);
2362 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2363 (struct crt_twarp_ctxt, Name));
2364 buf->ccontext.NameLength = cpu_to_le16(4);
2365 /* SMB2_CREATE_TIMEWARP_TOKEN is "TWrp" */
2370 buf->Timestamp = cpu_to_le64(timewarp);
2374 /* See MS-SMB2 2.2.13.2.7 */
2376 add_twarp_context(struct kvec *iov, unsigned int *num_iovec, __u64 timewarp)
2378 unsigned int num = *num_iovec;
2380 iov[num].iov_base = create_twarp_buf(timewarp);
2381 if (iov[num].iov_base == NULL)
2383 iov[num].iov_len = sizeof(struct crt_twarp_ctxt);
2384 *num_iovec = num + 1;
2388 /* See http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx */
2389 static void setup_owner_group_sids(char *buf)
2391 struct owner_group_sids *sids = (struct owner_group_sids *)buf;
2393 /* Populate the user ownership fields S-1-5-88-1 */
2394 sids->owner.Revision = 1;
2395 sids->owner.NumAuth = 3;
2396 sids->owner.Authority[5] = 5;
2397 sids->owner.SubAuthorities[0] = cpu_to_le32(88);
2398 sids->owner.SubAuthorities[1] = cpu_to_le32(1);
2399 sids->owner.SubAuthorities[2] = cpu_to_le32(current_fsuid().val);
2401 /* Populate the group ownership fields S-1-5-88-2 */
2402 sids->group.Revision = 1;
2403 sids->group.NumAuth = 3;
2404 sids->group.Authority[5] = 5;
2405 sids->group.SubAuthorities[0] = cpu_to_le32(88);
2406 sids->group.SubAuthorities[1] = cpu_to_le32(2);
2407 sids->group.SubAuthorities[2] = cpu_to_le32(current_fsgid().val);
2409 cifs_dbg(FYI, "owner S-1-5-88-1-%d, group S-1-5-88-2-%d\n", current_fsuid().val, current_fsgid().val);
2412 /* See MS-SMB2 2.2.13.2.2 and MS-DTYP 2.4.6 */
2413 static struct crt_sd_ctxt *
2414 create_sd_buf(umode_t mode, bool set_owner, unsigned int *len)
2416 struct crt_sd_ctxt *buf;
2418 unsigned int acelen, acl_size, ace_count;
2419 unsigned int owner_offset = 0;
2420 unsigned int group_offset = 0;
2421 struct smb3_acl acl = {};
2423 *len = round_up(sizeof(struct crt_sd_ctxt) + (sizeof(struct cifs_ace) * 4), 8);
2426 /* sizeof(struct owner_group_sids) is already multiple of 8 so no need to round */
2427 *len += sizeof(struct owner_group_sids);
2430 buf = kzalloc(*len, GFP_KERNEL);
2434 ptr = (__u8 *)&buf[1];
2436 /* offset fields are from beginning of security descriptor not of create context */
2437 owner_offset = ptr - (__u8 *)&buf->sd;
2438 buf->sd.OffsetOwner = cpu_to_le32(owner_offset);
2439 group_offset = owner_offset + offsetof(struct owner_group_sids, group);
2440 buf->sd.OffsetGroup = cpu_to_le32(group_offset);
2442 setup_owner_group_sids(ptr);
2443 ptr += sizeof(struct owner_group_sids);
2445 buf->sd.OffsetOwner = 0;
2446 buf->sd.OffsetGroup = 0;
2449 buf->ccontext.DataOffset = cpu_to_le16(offsetof(struct crt_sd_ctxt, sd));
2450 buf->ccontext.NameOffset = cpu_to_le16(offsetof(struct crt_sd_ctxt, Name));
2451 buf->ccontext.NameLength = cpu_to_le16(4);
2452 /* SMB2_CREATE_SD_BUFFER_TOKEN is "SecD" */
2457 buf->sd.Revision = 1; /* Must be one see MS-DTYP 2.4.6 */
2460 * ACL is "self relative" ie ACL is stored in contiguous block of memory
2461 * and "DP" ie the DACL is present
2463 buf->sd.Control = cpu_to_le16(ACL_CONTROL_SR | ACL_CONTROL_DP);
2465 /* offset owner, group and Sbz1 and SACL are all zero */
2466 buf->sd.OffsetDacl = cpu_to_le32(ptr - (__u8 *)&buf->sd);
2467 /* Ship the ACL for now. we will copy it into buf later. */
2469 ptr += sizeof(struct smb3_acl);
2471 /* create one ACE to hold the mode embedded in reserved special SID */
2472 acelen = setup_special_mode_ACE((struct cifs_ace *)ptr, (__u64)mode);
2474 acl_size = acelen + sizeof(struct smb3_acl);
2478 /* we do not need to reallocate buffer to add the two more ACEs. plenty of space */
2479 acelen = setup_special_user_owner_ACE((struct cifs_ace *)ptr);
2485 /* and one more ACE to allow access for authenticated users */
2486 acelen = setup_authusers_ACE((struct cifs_ace *)ptr);
2491 acl.AclRevision = ACL_REVISION; /* See 2.4.4.1 of MS-DTYP */
2492 acl.AclSize = cpu_to_le16(acl_size);
2493 acl.AceCount = cpu_to_le16(ace_count);
2494 /* acl.Sbz1 and Sbz2 MBZ so are not set here, but initialized above */
2495 memcpy(aclptr, &acl, sizeof(struct smb3_acl));
2497 buf->ccontext.DataLength = cpu_to_le32(ptr - (__u8 *)&buf->sd);
2498 *len = round_up((unsigned int)(ptr - (__u8 *)buf), 8);
2504 add_sd_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode, bool set_owner)
2506 unsigned int num = *num_iovec;
2507 unsigned int len = 0;
2509 iov[num].iov_base = create_sd_buf(mode, set_owner, &len);
2510 if (iov[num].iov_base == NULL)
2512 iov[num].iov_len = len;
2513 *num_iovec = num + 1;
2517 static struct crt_query_id_ctxt *
2518 create_query_id_buf(void)
2520 struct crt_query_id_ctxt *buf;
2522 buf = kzalloc(sizeof(struct crt_query_id_ctxt), GFP_KERNEL);
2526 buf->ccontext.DataOffset = cpu_to_le16(0);
2527 buf->ccontext.DataLength = cpu_to_le32(0);
2528 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2529 (struct crt_query_id_ctxt, Name));
2530 buf->ccontext.NameLength = cpu_to_le16(4);
2531 /* SMB2_CREATE_QUERY_ON_DISK_ID is "QFid" */
2539 /* See MS-SMB2 2.2.13.2.9 */
2541 add_query_id_context(struct kvec *iov, unsigned int *num_iovec)
2543 unsigned int num = *num_iovec;
2545 iov[num].iov_base = create_query_id_buf();
2546 if (iov[num].iov_base == NULL)
2548 iov[num].iov_len = sizeof(struct crt_query_id_ctxt);
2549 *num_iovec = num + 1;
2554 alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
2555 const char *treename, const __le16 *path)
2557 int treename_len, path_len;
2558 struct nls_table *cp;
2559 const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
2564 treename_len = strlen(treename);
2565 if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\'))
2571 path_len = UniStrnlen((wchar_t *)path, PATH_MAX);
2573 /* make room for one path separator only if @path isn't empty */
2574 *out_len = treename_len + (path[0] ? 1 : 0) + path_len;
2577 * final path needs to be 8-byte aligned as specified in
2578 * MS-SMB2 2.2.13 SMB2 CREATE Request.
2580 *out_size = round_up(*out_len * sizeof(__le16), 8);
2581 *out_path = kzalloc(*out_size + sizeof(__le16) /* null */, GFP_KERNEL);
2585 cp = load_nls_default();
2586 cifs_strtoUTF16(*out_path, treename, treename_len, cp);
2588 /* Do not append the separator if the path is empty */
2589 if (path[0] != cpu_to_le16(0x0000)) {
2590 UniStrcat((wchar_t *)*out_path, (wchar_t *)sep);
2591 UniStrcat((wchar_t *)*out_path, (wchar_t *)path);
2599 int smb311_posix_mkdir(const unsigned int xid, struct inode *inode,
2600 umode_t mode, struct cifs_tcon *tcon,
2601 const char *full_path,
2602 struct cifs_sb_info *cifs_sb)
2604 struct smb_rqst rqst;
2605 struct smb2_create_req *req;
2606 struct smb2_create_rsp *rsp = NULL;
2607 struct cifs_ses *ses = tcon->ses;
2608 struct kvec iov[3]; /* make sure at least one for each open context */
2609 struct kvec rsp_iov = {NULL, 0};
2612 __le16 *copy_path = NULL;
2615 unsigned int n_iov = 2;
2616 __u32 file_attributes = 0;
2617 char *pc_buf = NULL;
2619 unsigned int total_len;
2620 __le16 *utf16_path = NULL;
2621 struct TCP_Server_Info *server = cifs_pick_channel(ses);
2623 cifs_dbg(FYI, "mkdir\n");
2625 /* resource #1: path allocation */
2626 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2630 if (!ses || !server) {
2635 /* resource #2: request */
2636 rc = smb2_plain_req_init(SMB2_CREATE, tcon, server,
2637 (void **) &req, &total_len);
2642 if (smb3_encryption_required(tcon))
2643 flags |= CIFS_TRANSFORM_REQ;
2645 req->ImpersonationLevel = IL_IMPERSONATION;
2646 req->DesiredAccess = cpu_to_le32(FILE_WRITE_ATTRIBUTES);
2647 /* File attributes ignored on open (used in create though) */
2648 req->FileAttributes = cpu_to_le32(file_attributes);
2649 req->ShareAccess = FILE_SHARE_ALL_LE;
2650 req->CreateDisposition = cpu_to_le32(FILE_CREATE);
2651 req->CreateOptions = cpu_to_le32(CREATE_NOT_FILE);
2653 iov[0].iov_base = (char *)req;
2654 /* -1 since last byte is buf[0] which is sent below (path) */
2655 iov[0].iov_len = total_len - 1;
2657 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
2659 /* [MS-SMB2] 2.2.13 NameOffset:
2660 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2661 * the SMB2 header, the file name includes a prefix that will
2662 * be processed during DFS name normalization as specified in
2663 * section 3.3.5.9. Otherwise, the file name is relative to
2664 * the share that is identified by the TreeId in the SMB2
2667 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
2670 req->hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
2671 rc = alloc_path_with_tree_prefix(©_path, ©_size,
2673 tcon->tree_name, utf16_path);
2677 req->NameLength = cpu_to_le16(name_len * 2);
2678 uni_path_len = copy_size;
2679 /* free before overwriting resource */
2681 utf16_path = copy_path;
2683 uni_path_len = (2 * UniStrnlen((wchar_t *)utf16_path, PATH_MAX)) + 2;
2684 /* MUST set path len (NameLength) to 0 opening root of share */
2685 req->NameLength = cpu_to_le16(uni_path_len - 2);
2686 if (uni_path_len % 8 != 0) {
2687 copy_size = roundup(uni_path_len, 8);
2688 copy_path = kzalloc(copy_size, GFP_KERNEL);
2693 memcpy((char *)copy_path, (const char *)utf16_path,
2695 uni_path_len = copy_size;
2696 /* free before overwriting resource */
2698 utf16_path = copy_path;
2702 iov[1].iov_len = uni_path_len;
2703 iov[1].iov_base = utf16_path;
2704 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2706 if (tcon->posix_extensions) {
2707 /* resource #3: posix buf */
2708 rc = add_posix_context(iov, &n_iov, mode);
2711 req->CreateContextsOffset = cpu_to_le32(
2712 sizeof(struct smb2_create_req) +
2714 pc_buf = iov[n_iov-1].iov_base;
2718 memset(&rqst, 0, sizeof(struct smb_rqst));
2720 rqst.rq_nvec = n_iov;
2722 /* no need to inc num_remote_opens because we close it just below */
2723 trace_smb3_posix_mkdir_enter(xid, tcon->tid, ses->Suid, full_path, CREATE_NOT_FILE,
2724 FILE_WRITE_ATTRIBUTES);
2725 /* resource #4: response buffer */
2726 rc = cifs_send_recv(xid, ses, server,
2727 &rqst, &resp_buftype, flags, &rsp_iov);
2729 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
2730 trace_smb3_posix_mkdir_err(xid, tcon->tid, ses->Suid,
2732 FILE_WRITE_ATTRIBUTES, rc);
2733 goto err_free_rsp_buf;
2737 * Although unlikely to be possible for rsp to be null and rc not set,
2738 * adding check below is slightly safer long term (and quiets Coverity
2741 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2748 trace_smb3_posix_mkdir_done(xid, rsp->PersistentFileId, tcon->tid, ses->Suid,
2749 CREATE_NOT_FILE, FILE_WRITE_ATTRIBUTES);
2751 SMB2_close(xid, tcon, rsp->PersistentFileId, rsp->VolatileFileId);
2753 /* Eventually save off posix specific response info and timestaps */
2756 free_rsp_buf(resp_buftype, rsp);
2759 cifs_small_buf_release(req);
2766 SMB2_open_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
2767 struct smb_rqst *rqst, __u8 *oplock,
2768 struct cifs_open_parms *oparms, __le16 *path)
2770 struct smb2_create_req *req;
2771 unsigned int n_iov = 2;
2772 __u32 file_attributes = 0;
2775 unsigned int total_len;
2776 struct kvec *iov = rqst->rq_iov;
2780 rc = smb2_plain_req_init(SMB2_CREATE, tcon, server,
2781 (void **) &req, &total_len);
2785 iov[0].iov_base = (char *)req;
2786 /* -1 since last byte is buf[0] which is sent below (path) */
2787 iov[0].iov_len = total_len - 1;
2789 if (oparms->create_options & CREATE_OPTION_READONLY)
2790 file_attributes |= ATTR_READONLY;
2791 if (oparms->create_options & CREATE_OPTION_SPECIAL)
2792 file_attributes |= ATTR_SYSTEM;
2794 req->ImpersonationLevel = IL_IMPERSONATION;
2795 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
2796 /* File attributes ignored on open (used in create though) */
2797 req->FileAttributes = cpu_to_le32(file_attributes);
2798 req->ShareAccess = FILE_SHARE_ALL_LE;
2800 req->CreateDisposition = cpu_to_le32(oparms->disposition);
2801 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
2802 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
2804 /* [MS-SMB2] 2.2.13 NameOffset:
2805 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2806 * the SMB2 header, the file name includes a prefix that will
2807 * be processed during DFS name normalization as specified in
2808 * section 3.3.5.9. Otherwise, the file name is relative to
2809 * the share that is identified by the TreeId in the SMB2
2812 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
2815 req->hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
2816 rc = alloc_path_with_tree_prefix(©_path, ©_size,
2818 tcon->tree_name, path);
2821 req->NameLength = cpu_to_le16(name_len * 2);
2822 uni_path_len = copy_size;
2825 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
2826 /* MUST set path len (NameLength) to 0 opening root of share */
2827 req->NameLength = cpu_to_le16(uni_path_len - 2);
2828 copy_size = round_up(uni_path_len, 8);
2829 copy_path = kzalloc(copy_size, GFP_KERNEL);
2832 memcpy((char *)copy_path, (const char *)path,
2834 uni_path_len = copy_size;
2838 iov[1].iov_len = uni_path_len;
2839 iov[1].iov_base = path;
2841 if ((!server->oplocks) || (tcon->no_lease))
2842 *oplock = SMB2_OPLOCK_LEVEL_NONE;
2844 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
2845 *oplock == SMB2_OPLOCK_LEVEL_NONE)
2846 req->RequestedOplockLevel = *oplock;
2847 else if (!(server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING) &&
2848 (oparms->create_options & CREATE_NOT_FILE))
2849 req->RequestedOplockLevel = *oplock; /* no srv lease support */
2851 rc = add_lease_context(server, req, iov, &n_iov,
2852 oparms->fid->lease_key, oplock);
2857 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
2858 rc = add_durable_context(iov, &n_iov, oparms,
2859 tcon->use_persistent);
2864 if (tcon->posix_extensions) {
2865 rc = add_posix_context(iov, &n_iov, oparms->mode);
2870 if (tcon->snapshot_time) {
2871 cifs_dbg(FYI, "adding snapshot context\n");
2872 rc = add_twarp_context(iov, &n_iov, tcon->snapshot_time);
2877 if ((oparms->disposition != FILE_OPEN) && (oparms->cifs_sb)) {
2881 if ((oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) &&
2882 (oparms->mode != ACL_NO_MODE))
2886 oparms->mode = ACL_NO_MODE;
2889 if (oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL)
2894 if (set_owner | set_mode) {
2895 cifs_dbg(FYI, "add sd with mode 0x%x\n", oparms->mode);
2896 rc = add_sd_context(iov, &n_iov, oparms->mode, set_owner);
2902 add_query_id_context(iov, &n_iov);
2906 * We have create contexts behind iov[1] (the file
2907 * name), point at them from the main create request
2909 req->CreateContextsOffset = cpu_to_le32(
2910 sizeof(struct smb2_create_req) +
2912 req->CreateContextsLength = 0;
2914 for (unsigned int i = 2; i < (n_iov-1); i++) {
2915 struct kvec *v = &iov[i];
2916 size_t len = v->iov_len;
2917 struct create_context *cctx =
2918 (struct create_context *)v->iov_base;
2920 cctx->Next = cpu_to_le32(len);
2921 le32_add_cpu(&req->CreateContextsLength, len);
2923 le32_add_cpu(&req->CreateContextsLength,
2924 iov[n_iov-1].iov_len);
2927 rqst->rq_nvec = n_iov;
2931 /* rq_iov[0] is the request and is released by cifs_small_buf_release().
2932 * All other vectors are freed by kfree().
2935 SMB2_open_free(struct smb_rqst *rqst)
2939 if (rqst && rqst->rq_iov) {
2940 cifs_small_buf_release(rqst->rq_iov[0].iov_base);
2941 for (i = 1; i < rqst->rq_nvec; i++)
2942 if (rqst->rq_iov[i].iov_base != smb2_padding)
2943 kfree(rqst->rq_iov[i].iov_base);
2948 SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
2949 __u8 *oplock, struct smb2_file_all_info *buf,
2950 struct create_posix_rsp *posix,
2951 struct kvec *err_iov, int *buftype)
2953 struct smb_rqst rqst;
2954 struct smb2_create_rsp *rsp = NULL;
2955 struct cifs_tcon *tcon = oparms->tcon;
2956 struct cifs_ses *ses = tcon->ses;
2957 struct TCP_Server_Info *server = cifs_pick_channel(ses);
2958 struct kvec iov[SMB2_CREATE_IOV_SIZE];
2959 struct kvec rsp_iov = {NULL, 0};
2960 int resp_buftype = CIFS_NO_BUFFER;
2964 cifs_dbg(FYI, "create/open\n");
2965 if (!ses || !server)
2968 if (smb3_encryption_required(tcon))
2969 flags |= CIFS_TRANSFORM_REQ;
2971 memset(&rqst, 0, sizeof(struct smb_rqst));
2972 memset(&iov, 0, sizeof(iov));
2974 rqst.rq_nvec = SMB2_CREATE_IOV_SIZE;
2976 rc = SMB2_open_init(tcon, server,
2977 &rqst, oplock, oparms, path);
2981 trace_smb3_open_enter(xid, tcon->tid, tcon->ses->Suid, oparms->path,
2982 oparms->create_options, oparms->desired_access);
2984 rc = cifs_send_recv(xid, ses, server,
2985 &rqst, &resp_buftype, flags,
2987 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2990 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
2991 if (err_iov && rsp) {
2993 *buftype = resp_buftype;
2994 resp_buftype = CIFS_NO_BUFFER;
2997 trace_smb3_open_err(xid, tcon->tid, ses->Suid,
2998 oparms->create_options, oparms->desired_access, rc);
2999 if (rc == -EREMCHG) {
3000 pr_warn_once("server share %s deleted\n",
3002 tcon->need_reconnect = true;
3005 } else if (rsp == NULL) /* unlikely to happen, but safer to check */
3008 trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid, ses->Suid,
3009 oparms->create_options, oparms->desired_access);
3011 atomic_inc(&tcon->num_remote_opens);
3012 oparms->fid->persistent_fid = rsp->PersistentFileId;
3013 oparms->fid->volatile_fid = rsp->VolatileFileId;
3014 oparms->fid->access = oparms->desired_access;
3015 #ifdef CONFIG_CIFS_DEBUG2
3016 oparms->fid->mid = le64_to_cpu(rsp->hdr.MessageId);
3017 #endif /* CIFS_DEBUG2 */
3020 buf->CreationTime = rsp->CreationTime;
3021 buf->LastAccessTime = rsp->LastAccessTime;
3022 buf->LastWriteTime = rsp->LastWriteTime;
3023 buf->ChangeTime = rsp->ChangeTime;
3024 buf->AllocationSize = rsp->AllocationSize;
3025 buf->EndOfFile = rsp->EndofFile;
3026 buf->Attributes = rsp->FileAttributes;
3027 buf->NumberOfLinks = cpu_to_le32(1);
3028 buf->DeletePending = 0;
3032 smb2_parse_contexts(server, rsp, &oparms->fid->epoch,
3033 oparms->fid->lease_key, oplock, buf, posix);
3035 SMB2_open_free(&rqst);
3036 free_rsp_buf(resp_buftype, rsp);
3041 SMB2_ioctl_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
3042 struct smb_rqst *rqst,
3043 u64 persistent_fid, u64 volatile_fid, u32 opcode,
3044 char *in_data, u32 indatalen,
3045 __u32 max_response_size)
3047 struct smb2_ioctl_req *req;
3048 struct kvec *iov = rqst->rq_iov;
3049 unsigned int total_len;
3053 rc = smb2_ioctl_req_init(opcode, tcon, server,
3054 (void **) &req, &total_len);
3060 * indatalen is usually small at a couple of bytes max, so
3061 * just allocate through generic pool
3063 in_data_buf = kmemdup(in_data, indatalen, GFP_NOFS);
3065 cifs_small_buf_release(req);
3070 req->CtlCode = cpu_to_le32(opcode);
3071 req->PersistentFileId = persistent_fid;
3072 req->VolatileFileId = volatile_fid;
3074 iov[0].iov_base = (char *)req;
3076 * If no input data, the size of ioctl struct in
3077 * protocol spec still includes a 1 byte data buffer,
3078 * but if input data passed to ioctl, we do not
3079 * want to double count this, so we do not send
3080 * the dummy one byte of data in iovec[0] if sending
3081 * input data (in iovec[1]).
3084 req->InputCount = cpu_to_le32(indatalen);
3085 /* do not set InputOffset if no input data */
3087 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer));
3089 iov[0].iov_len = total_len - 1;
3090 iov[1].iov_base = in_data_buf;
3091 iov[1].iov_len = indatalen;
3094 iov[0].iov_len = total_len;
3097 req->OutputOffset = 0;
3098 req->OutputCount = 0; /* MBZ */
3101 * In most cases max_response_size is set to 16K (CIFSMaxBufSize)
3102 * We Could increase default MaxOutputResponse, but that could require
3103 * more credits. Windows typically sets this smaller, but for some
3104 * ioctls it may be useful to allow server to send more. No point
3105 * limiting what the server can send as long as fits in one credit
3106 * We can not handle more than CIFS_MAX_BUF_SIZE yet but may want
3107 * to increase this limit up in the future.
3108 * Note that for snapshot queries that servers like Azure expect that
3109 * the first query be minimal size (and just used to get the number/size
3110 * of previous versions) so response size must be specified as EXACTLY
3111 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
3112 * of eight bytes. Currently that is the only case where we set max
3113 * response size smaller.
3115 req->MaxOutputResponse = cpu_to_le32(max_response_size);
3116 req->hdr.CreditCharge =
3117 cpu_to_le16(DIV_ROUND_UP(max(indatalen, max_response_size),
3118 SMB2_MAX_BUFFER_SIZE));
3119 /* always an FSCTL (for now) */
3120 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
3122 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
3123 if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO)
3124 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
3130 SMB2_ioctl_free(struct smb_rqst *rqst)
3134 if (rqst && rqst->rq_iov) {
3135 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
3136 for (i = 1; i < rqst->rq_nvec; i++)
3137 if (rqst->rq_iov[i].iov_base != smb2_padding)
3138 kfree(rqst->rq_iov[i].iov_base);
3144 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
3147 SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
3148 u64 volatile_fid, u32 opcode, char *in_data, u32 indatalen,
3149 u32 max_out_data_len, char **out_data,
3150 u32 *plen /* returned data len */)
3152 struct smb_rqst rqst;
3153 struct smb2_ioctl_rsp *rsp = NULL;
3154 struct cifs_ses *ses;
3155 struct TCP_Server_Info *server;
3156 struct kvec iov[SMB2_IOCTL_IOV_SIZE];
3157 struct kvec rsp_iov = {NULL, 0};
3158 int resp_buftype = CIFS_NO_BUFFER;
3162 cifs_dbg(FYI, "SMB2 IOCTL\n");
3164 if (out_data != NULL)
3167 /* zero out returned data len, in case of error */
3178 server = cifs_pick_channel(ses);
3182 if (smb3_encryption_required(tcon))
3183 flags |= CIFS_TRANSFORM_REQ;
3185 memset(&rqst, 0, sizeof(struct smb_rqst));
3186 memset(&iov, 0, sizeof(iov));
3188 rqst.rq_nvec = SMB2_IOCTL_IOV_SIZE;
3190 rc = SMB2_ioctl_init(tcon, server,
3191 &rqst, persistent_fid, volatile_fid, opcode,
3192 in_data, indatalen, max_out_data_len);
3196 rc = cifs_send_recv(xid, ses, server,
3197 &rqst, &resp_buftype, flags,
3199 rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
3202 trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid,
3203 ses->Suid, 0, opcode, rc);
3205 if ((rc != 0) && (rc != -EINVAL) && (rc != -E2BIG)) {
3206 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
3208 } else if (rc == -EINVAL) {
3209 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
3210 (opcode != FSCTL_SRV_COPYCHUNK)) {
3211 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
3214 } else if (rc == -E2BIG) {
3215 if (opcode != FSCTL_QUERY_ALLOCATED_RANGES) {
3216 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
3221 /* check if caller wants to look at return data or just return rc */
3222 if ((plen == NULL) || (out_data == NULL))
3226 * Although unlikely to be possible for rsp to be null and rc not set,
3227 * adding check below is slightly safer long term (and quiets Coverity
3235 *plen = le32_to_cpu(rsp->OutputCount);
3237 /* We check for obvious errors in the output buffer length and offset */
3239 goto ioctl_exit; /* server returned no data */
3240 else if (*plen > rsp_iov.iov_len || *plen > 0xFF00) {
3241 cifs_tcon_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
3247 if (rsp_iov.iov_len - *plen < le32_to_cpu(rsp->OutputOffset)) {
3248 cifs_tcon_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
3249 le32_to_cpu(rsp->OutputOffset));
3255 *out_data = kmemdup((char *)rsp + le32_to_cpu(rsp->OutputOffset),
3257 if (*out_data == NULL) {
3263 SMB2_ioctl_free(&rqst);
3264 free_rsp_buf(resp_buftype, rsp);
3269 * Individual callers to ioctl worker function follow
3273 SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
3274 u64 persistent_fid, u64 volatile_fid)
3277 struct compress_ioctl fsctl_input;
3278 char *ret_data = NULL;
3280 fsctl_input.CompressionState =
3281 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
3283 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
3284 FSCTL_SET_COMPRESSION,
3285 (char *)&fsctl_input /* data input */,
3286 2 /* in data len */, CIFSMaxBufSize /* max out data */,
3287 &ret_data /* out data */, NULL);
3289 cifs_dbg(FYI, "set compression rc %d\n", rc);
3295 SMB2_close_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
3296 struct smb_rqst *rqst,
3297 u64 persistent_fid, u64 volatile_fid, bool query_attrs)
3299 struct smb2_close_req *req;
3300 struct kvec *iov = rqst->rq_iov;
3301 unsigned int total_len;
3304 rc = smb2_plain_req_init(SMB2_CLOSE, tcon, server,
3305 (void **) &req, &total_len);
3309 req->PersistentFileId = persistent_fid;
3310 req->VolatileFileId = volatile_fid;
3312 req->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
3315 iov[0].iov_base = (char *)req;
3316 iov[0].iov_len = total_len;
3322 SMB2_close_free(struct smb_rqst *rqst)
3324 if (rqst && rqst->rq_iov)
3325 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
3329 __SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
3330 u64 persistent_fid, u64 volatile_fid,
3331 struct smb2_file_network_open_info *pbuf)
3333 struct smb_rqst rqst;
3334 struct smb2_close_rsp *rsp = NULL;
3335 struct cifs_ses *ses = tcon->ses;
3336 struct TCP_Server_Info *server = cifs_pick_channel(ses);
3338 struct kvec rsp_iov;
3339 int resp_buftype = CIFS_NO_BUFFER;
3342 bool query_attrs = false;
3344 cifs_dbg(FYI, "Close\n");
3346 if (!ses || !server)
3349 if (smb3_encryption_required(tcon))
3350 flags |= CIFS_TRANSFORM_REQ;
3352 memset(&rqst, 0, sizeof(struct smb_rqst));
3353 memset(&iov, 0, sizeof(iov));
3357 /* check if need to ask server to return timestamps in close response */
3361 trace_smb3_close_enter(xid, persistent_fid, tcon->tid, ses->Suid);
3362 rc = SMB2_close_init(tcon, server,
3363 &rqst, persistent_fid, volatile_fid,
3368 rc = cifs_send_recv(xid, ses, server,
3369 &rqst, &resp_buftype, flags, &rsp_iov);
3370 rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
3373 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
3374 trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid,
3378 trace_smb3_close_done(xid, persistent_fid, tcon->tid,
3381 * Note that have to subtract 4 since struct network_open_info
3382 * has a final 4 byte pad that close response does not have
3385 memcpy(pbuf, (char *)&rsp->CreationTime, sizeof(*pbuf) - 4);
3388 atomic_dec(&tcon->num_remote_opens);
3390 SMB2_close_free(&rqst);
3391 free_rsp_buf(resp_buftype, rsp);
3393 /* retry close in a worker thread if this one is interrupted */
3394 if (is_interrupt_error(rc)) {
3397 tmp_rc = smb2_handle_cancelled_close(tcon, persistent_fid,
3400 cifs_dbg(VFS, "handle cancelled close fid 0x%llx returned error %d\n",
3401 persistent_fid, tmp_rc);
3407 SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
3408 u64 persistent_fid, u64 volatile_fid)
3410 return __SMB2_close(xid, tcon, persistent_fid, volatile_fid, NULL);
3414 smb2_validate_iov(unsigned int offset, unsigned int buffer_length,
3415 struct kvec *iov, unsigned int min_buf_size)
3417 unsigned int smb_len = iov->iov_len;
3418 char *end_of_smb = smb_len + (char *)iov->iov_base;
3419 char *begin_of_buf = offset + (char *)iov->iov_base;
3420 char *end_of_buf = begin_of_buf + buffer_length;
3423 if (buffer_length < min_buf_size) {
3424 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
3425 buffer_length, min_buf_size);
3429 /* check if beyond RFC1001 maximum length */
3430 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
3431 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
3432 buffer_length, smb_len);
3436 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
3437 cifs_dbg(VFS, "Invalid server response, bad offset to data\n");
3445 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
3446 * Caller must free buffer.
3449 smb2_validate_and_copy_iov(unsigned int offset, unsigned int buffer_length,
3450 struct kvec *iov, unsigned int minbufsize,
3453 char *begin_of_buf = offset + (char *)iov->iov_base;
3459 rc = smb2_validate_iov(offset, buffer_length, iov, minbufsize);
3463 memcpy(data, begin_of_buf, minbufsize);
3469 SMB2_query_info_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
3470 struct smb_rqst *rqst,
3471 u64 persistent_fid, u64 volatile_fid,
3472 u8 info_class, u8 info_type, u32 additional_info,
3473 size_t output_len, size_t input_len, void *input)
3475 struct smb2_query_info_req *req;
3476 struct kvec *iov = rqst->rq_iov;
3477 unsigned int total_len;
3480 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, server,
3481 (void **) &req, &total_len);
3485 req->InfoType = info_type;
3486 req->FileInfoClass = info_class;
3487 req->PersistentFileId = persistent_fid;
3488 req->VolatileFileId = volatile_fid;
3489 req->AdditionalInformation = cpu_to_le32(additional_info);
3491 req->OutputBufferLength = cpu_to_le32(output_len);
3493 req->InputBufferLength = cpu_to_le32(input_len);
3494 /* total_len for smb query request never close to le16 max */
3495 req->InputBufferOffset = cpu_to_le16(total_len - 1);
3496 memcpy(req->Buffer, input, input_len);
3499 iov[0].iov_base = (char *)req;
3501 iov[0].iov_len = total_len - 1 + input_len;
3506 SMB2_query_info_free(struct smb_rqst *rqst)
3508 if (rqst && rqst->rq_iov)
3509 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
3513 query_info(const unsigned int xid, struct cifs_tcon *tcon,
3514 u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
3515 u32 additional_info, size_t output_len, size_t min_len, void **data,
3518 struct smb_rqst rqst;
3519 struct smb2_query_info_rsp *rsp = NULL;
3521 struct kvec rsp_iov;
3523 int resp_buftype = CIFS_NO_BUFFER;
3524 struct cifs_ses *ses = tcon->ses;
3525 struct TCP_Server_Info *server;
3527 bool allocated = false;
3529 cifs_dbg(FYI, "Query Info\n");
3533 server = cifs_pick_channel(ses);
3537 if (smb3_encryption_required(tcon))
3538 flags |= CIFS_TRANSFORM_REQ;
3540 memset(&rqst, 0, sizeof(struct smb_rqst));
3541 memset(&iov, 0, sizeof(iov));
3545 rc = SMB2_query_info_init(tcon, server,
3546 &rqst, persistent_fid, volatile_fid,
3547 info_class, info_type, additional_info,
3548 output_len, 0, NULL);
3552 trace_smb3_query_info_enter(xid, persistent_fid, tcon->tid,
3553 ses->Suid, info_class, (__u32)info_type);
3555 rc = cifs_send_recv(xid, ses, server,
3556 &rqst, &resp_buftype, flags, &rsp_iov);
3557 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
3560 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
3561 trace_smb3_query_info_err(xid, persistent_fid, tcon->tid,
3562 ses->Suid, info_class, (__u32)info_type, rc);
3566 trace_smb3_query_info_done(xid, persistent_fid, tcon->tid,
3567 ses->Suid, info_class, (__u32)info_type);
3570 *dlen = le32_to_cpu(rsp->OutputBufferLength);
3572 *data = kmalloc(*dlen, GFP_KERNEL);
3575 "Error %d allocating memory for acl\n",
3585 rc = smb2_validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset),
3586 le32_to_cpu(rsp->OutputBufferLength),
3587 &rsp_iov, dlen ? *dlen : min_len, *data);
3588 if (rc && allocated) {
3595 SMB2_query_info_free(&rqst);
3596 free_rsp_buf(resp_buftype, rsp);
3600 int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
3601 u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data)
3603 return query_info(xid, tcon, persistent_fid, volatile_fid,
3604 FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0,
3605 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
3606 sizeof(struct smb2_file_all_info), (void **)&data,
3611 /* currently unused, as now we are doing compounding instead (see smb311_posix_query_path_info) */
3613 SMB311_posix_query_info(const unsigned int xid, struct cifs_tcon *tcon,
3614 u64 persistent_fid, u64 volatile_fid, struct smb311_posix_qinfo *data, u32 *plen)
3616 size_t output_len = sizeof(struct smb311_posix_qinfo *) +
3617 (sizeof(struct cifs_sid) * 2) + (PATH_MAX * 2);
3620 return query_info(xid, tcon, persistent_fid, volatile_fid,
3621 SMB_FIND_FILE_POSIX_INFO, SMB2_O_INFO_FILE, 0,
3622 output_len, sizeof(struct smb311_posix_qinfo), (void **)&data, plen);
3623 /* Note caller must free "data" (passed in above). It may be allocated in query_info call */
3628 SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
3629 u64 persistent_fid, u64 volatile_fid,
3630 void **data, u32 *plen, u32 extra_info)
3632 __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
3636 return query_info(xid, tcon, persistent_fid, volatile_fid,
3637 0, SMB2_O_INFO_SECURITY, additional_info,
3638 SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen);
3642 SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
3643 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
3645 return query_info(xid, tcon, persistent_fid, volatile_fid,
3646 FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0,
3647 sizeof(struct smb2_file_internal_info),
3648 sizeof(struct smb2_file_internal_info),
3649 (void **)&uniqueid, NULL);
3653 * CHANGE_NOTIFY Request is sent to get notifications on changes to a directory
3654 * See MS-SMB2 2.2.35 and 2.2.36
3658 SMB2_notify_init(const unsigned int xid, struct smb_rqst *rqst,
3659 struct cifs_tcon *tcon, struct TCP_Server_Info *server,
3660 u64 persistent_fid, u64 volatile_fid,
3661 u32 completion_filter, bool watch_tree)
3663 struct smb2_change_notify_req *req;
3664 struct kvec *iov = rqst->rq_iov;
3665 unsigned int total_len;
3668 rc = smb2_plain_req_init(SMB2_CHANGE_NOTIFY, tcon, server,
3669 (void **) &req, &total_len);
3673 req->PersistentFileId = persistent_fid;
3674 req->VolatileFileId = volatile_fid;
3675 /* See note 354 of MS-SMB2, 64K max */
3676 req->OutputBufferLength =
3677 cpu_to_le32(SMB2_MAX_BUFFER_SIZE - MAX_SMB2_HDR_SIZE);
3678 req->CompletionFilter = cpu_to_le32(completion_filter);
3680 req->Flags = cpu_to_le16(SMB2_WATCH_TREE);
3684 iov[0].iov_base = (char *)req;
3685 iov[0].iov_len = total_len;
3691 SMB2_change_notify(const unsigned int xid, struct cifs_tcon *tcon,
3692 u64 persistent_fid, u64 volatile_fid, bool watch_tree,
3693 u32 completion_filter, u32 max_out_data_len, char **out_data,
3694 u32 *plen /* returned data len */)
3696 struct cifs_ses *ses = tcon->ses;
3697 struct TCP_Server_Info *server = cifs_pick_channel(ses);
3698 struct smb_rqst rqst;
3699 struct smb2_change_notify_rsp *smb_rsp;
3701 struct kvec rsp_iov = {NULL, 0};
3702 int resp_buftype = CIFS_NO_BUFFER;
3706 cifs_dbg(FYI, "change notify\n");
3707 if (!ses || !server)
3710 if (smb3_encryption_required(tcon))
3711 flags |= CIFS_TRANSFORM_REQ;
3713 memset(&rqst, 0, sizeof(struct smb_rqst));
3714 memset(&iov, 0, sizeof(iov));
3721 rc = SMB2_notify_init(xid, &rqst, tcon, server,
3722 persistent_fid, volatile_fid,
3723 completion_filter, watch_tree);
3727 trace_smb3_notify_enter(xid, persistent_fid, tcon->tid, ses->Suid,
3728 (u8)watch_tree, completion_filter);
3729 rc = cifs_send_recv(xid, ses, server,
3730 &rqst, &resp_buftype, flags, &rsp_iov);
3733 cifs_stats_fail_inc(tcon, SMB2_CHANGE_NOTIFY_HE);
3734 trace_smb3_notify_err(xid, persistent_fid, tcon->tid, ses->Suid,
3735 (u8)watch_tree, completion_filter, rc);
3737 trace_smb3_notify_done(xid, persistent_fid, tcon->tid,
3738 ses->Suid, (u8)watch_tree, completion_filter);
3739 /* validate that notify information is plausible */
3740 if ((rsp_iov.iov_base == NULL) ||
3741 (rsp_iov.iov_len < sizeof(struct smb2_change_notify_rsp) + 1))
3744 smb_rsp = (struct smb2_change_notify_rsp *)rsp_iov.iov_base;
3746 smb2_validate_iov(le16_to_cpu(smb_rsp->OutputBufferOffset),
3747 le32_to_cpu(smb_rsp->OutputBufferLength), &rsp_iov,
3748 sizeof(struct file_notify_information));
3750 *out_data = kmemdup((char *)smb_rsp + le16_to_cpu(smb_rsp->OutputBufferOffset),
3751 le32_to_cpu(smb_rsp->OutputBufferLength), GFP_KERNEL);
3752 if (*out_data == NULL) {
3756 *plen = le32_to_cpu(smb_rsp->OutputBufferLength);
3761 cifs_small_buf_release(rqst.rq_iov[0].iov_base); /* request */
3762 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
3769 * This is a no-op for now. We're not really interested in the reply, but
3770 * rather in the fact that the server sent one and that server->lstrp
3773 * FIXME: maybe we should consider checking that the reply matches request?
3776 smb2_echo_callback(struct mid_q_entry *mid)
3778 struct TCP_Server_Info *server = mid->callback_data;
3779 struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
3780 struct cifs_credits credits = { .value = 0, .instance = 0 };
3782 if (mid->mid_state == MID_RESPONSE_RECEIVED
3783 || mid->mid_state == MID_RESPONSE_MALFORMED) {
3784 credits.value = le16_to_cpu(rsp->hdr.CreditRequest);
3785 credits.instance = server->reconnect_instance;
3789 add_credits(server, &credits, CIFS_ECHO_OP);
3792 void smb2_reconnect_server(struct work_struct *work)
3794 struct TCP_Server_Info *server = container_of(work,
3795 struct TCP_Server_Info, reconnect.work);
3796 struct TCP_Server_Info *pserver;
3797 struct cifs_ses *ses, *ses2;
3798 struct cifs_tcon *tcon, *tcon2;
3799 struct list_head tmp_list, tmp_ses_list;
3800 bool tcon_exist = false, ses_exist = false;
3801 bool tcon_selected = false;
3803 bool resched = false;
3805 /* If server is a channel, select the primary channel */
3806 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
3808 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
3809 mutex_lock(&pserver->reconnect_mutex);
3811 INIT_LIST_HEAD(&tmp_list);
3812 INIT_LIST_HEAD(&tmp_ses_list);
3813 cifs_dbg(FYI, "Reconnecting tcons and channels\n");
3815 spin_lock(&cifs_tcp_ses_lock);
3816 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
3817 spin_lock(&ses->ses_lock);
3818 if (ses->ses_status == SES_EXITING) {
3819 spin_unlock(&ses->ses_lock);
3822 spin_unlock(&ses->ses_lock);
3824 tcon_selected = false;
3826 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
3827 if (tcon->need_reconnect || tcon->need_reopen_files) {
3829 list_add_tail(&tcon->rlist, &tmp_list);
3830 tcon_selected = tcon_exist = true;
3834 * IPC has the same lifetime as its session and uses its
3837 if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) {
3838 list_add_tail(&ses->tcon_ipc->rlist, &tmp_list);
3839 tcon_selected = tcon_exist = true;
3840 cifs_smb_ses_inc_refcount(ses);
3843 * handle the case where channel needs to reconnect
3844 * binding session, but tcon is healthy (some other channel
3847 spin_lock(&ses->chan_lock);
3848 if (!tcon_selected && cifs_chan_needs_reconnect(ses, server)) {
3849 list_add_tail(&ses->rlist, &tmp_ses_list);
3851 cifs_smb_ses_inc_refcount(ses);
3853 spin_unlock(&ses->chan_lock);
3856 * Get the reference to server struct to be sure that the last call of
3857 * cifs_put_tcon() in the loop below won't release the server pointer.
3859 if (tcon_exist || ses_exist)
3860 server->srv_count++;
3862 spin_unlock(&cifs_tcp_ses_lock);
3864 list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
3865 rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon, server);
3867 cifs_reopen_persistent_handles(tcon);
3870 list_del_init(&tcon->rlist);
3872 cifs_put_smb_ses(tcon->ses);
3874 cifs_put_tcon(tcon);
3880 /* allocate a dummy tcon struct used for reconnect */
3881 tcon = tconInfoAlloc();
3884 list_for_each_entry_safe(ses, ses2, &tmp_ses_list, rlist) {
3885 list_del_init(&ses->rlist);
3886 cifs_put_smb_ses(ses);
3891 tcon->status = TID_GOOD;
3892 tcon->retry = false;
3893 tcon->need_reconnect = false;
3895 /* now reconnect sessions for necessary channels */
3896 list_for_each_entry_safe(ses, ses2, &tmp_ses_list, rlist) {
3898 rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon, server);
3901 list_del_init(&ses->rlist);
3902 cifs_put_smb_ses(ses);
3907 cifs_dbg(FYI, "Reconnecting tcons and channels finished\n");
3909 queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
3910 mutex_unlock(&pserver->reconnect_mutex);
3912 /* now we can safely release srv struct */
3913 if (tcon_exist || ses_exist)
3914 cifs_put_tcp_session(server, 1);
3918 SMB2_echo(struct TCP_Server_Info *server)
3920 struct smb2_echo_req *req;
3923 struct smb_rqst rqst = { .rq_iov = iov,
3925 unsigned int total_len;
3927 cifs_dbg(FYI, "In echo request for conn_id %lld\n", server->conn_id);
3929 spin_lock(&server->srv_lock);
3930 if (server->ops->need_neg &&
3931 server->ops->need_neg(server)) {
3932 spin_unlock(&server->srv_lock);
3933 /* No need to send echo on newly established connections */
3934 mod_delayed_work(cifsiod_wq, &server->reconnect, 0);
3937 spin_unlock(&server->srv_lock);
3939 rc = smb2_plain_req_init(SMB2_ECHO, NULL, server,
3940 (void **)&req, &total_len);
3944 req->hdr.CreditRequest = cpu_to_le16(1);
3946 iov[0].iov_len = total_len;
3947 iov[0].iov_base = (char *)req;
3949 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
3950 server, CIFS_ECHO_OP, NULL);
3952 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
3954 cifs_small_buf_release(req);
3959 SMB2_flush_free(struct smb_rqst *rqst)
3961 if (rqst && rqst->rq_iov)
3962 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
3966 SMB2_flush_init(const unsigned int xid, struct smb_rqst *rqst,
3967 struct cifs_tcon *tcon, struct TCP_Server_Info *server,
3968 u64 persistent_fid, u64 volatile_fid)
3970 struct smb2_flush_req *req;
3971 struct kvec *iov = rqst->rq_iov;
3972 unsigned int total_len;
3975 rc = smb2_plain_req_init(SMB2_FLUSH, tcon, server,
3976 (void **) &req, &total_len);
3980 req->PersistentFileId = persistent_fid;
3981 req->VolatileFileId = volatile_fid;
3983 iov[0].iov_base = (char *)req;
3984 iov[0].iov_len = total_len;
3990 SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
3993 struct cifs_ses *ses = tcon->ses;
3994 struct smb_rqst rqst;
3996 struct kvec rsp_iov = {NULL, 0};
3997 struct TCP_Server_Info *server = cifs_pick_channel(ses);
3998 int resp_buftype = CIFS_NO_BUFFER;
4002 cifs_dbg(FYI, "flush\n");
4003 if (!ses || !(ses->server))
4006 if (smb3_encryption_required(tcon))
4007 flags |= CIFS_TRANSFORM_REQ;
4009 memset(&rqst, 0, sizeof(struct smb_rqst));
4010 memset(&iov, 0, sizeof(iov));
4014 rc = SMB2_flush_init(xid, &rqst, tcon, server,
4015 persistent_fid, volatile_fid);
4019 trace_smb3_flush_enter(xid, persistent_fid, tcon->tid, ses->Suid);
4020 rc = cifs_send_recv(xid, ses, server,
4021 &rqst, &resp_buftype, flags, &rsp_iov);
4024 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
4025 trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid,
4028 trace_smb3_flush_done(xid, persistent_fid, tcon->tid,
4032 SMB2_flush_free(&rqst);
4033 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
4037 #ifdef CONFIG_CIFS_SMB_DIRECT
4038 static inline bool smb3_use_rdma_offload(struct cifs_io_parms *io_parms)
4040 struct TCP_Server_Info *server = io_parms->server;
4041 struct cifs_tcon *tcon = io_parms->tcon;
4043 /* we can only offload if we're connected */
4044 if (!server || !tcon)
4047 /* we can only offload on an rdma connection */
4048 if (!server->rdma || !server->smbd_conn)
4051 /* we don't support signed offload yet */
4055 /* we don't support encrypted offload yet */
4056 if (smb3_encryption_required(tcon))
4059 /* offload also has its overhead, so only do it if desired */
4060 if (io_parms->length < server->smbd_conn->rdma_readwrite_threshold)
4065 #endif /* CONFIG_CIFS_SMB_DIRECT */
4068 * To form a chain of read requests, any read requests after the first should
4069 * have the end_of_chain boolean set to true.
4072 smb2_new_read_req(void **buf, unsigned int *total_len,
4073 struct cifs_io_parms *io_parms, struct cifs_readdata *rdata,
4074 unsigned int remaining_bytes, int request_type)
4077 struct smb2_read_req *req = NULL;
4078 struct smb2_hdr *shdr;
4079 struct TCP_Server_Info *server = io_parms->server;
4081 rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, server,
4082 (void **) &req, total_len);
4087 return -ECONNABORTED;
4090 shdr->Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid);
4092 req->PersistentFileId = io_parms->persistent_fid;
4093 req->VolatileFileId = io_parms->volatile_fid;
4094 req->ReadChannelInfoOffset = 0; /* reserved */
4095 req->ReadChannelInfoLength = 0; /* reserved */
4096 req->Channel = 0; /* reserved */
4097 req->MinimumCount = 0;
4098 req->Length = cpu_to_le32(io_parms->length);
4099 req->Offset = cpu_to_le64(io_parms->offset);
4101 trace_smb3_read_enter(0 /* xid */,
4102 io_parms->persistent_fid,
4103 io_parms->tcon->tid, io_parms->tcon->ses->Suid,
4104 io_parms->offset, io_parms->length);
4105 #ifdef CONFIG_CIFS_SMB_DIRECT
4107 * If we want to do a RDMA write, fill in and append
4108 * smbd_buffer_descriptor_v1 to the end of read request
4110 if (smb3_use_rdma_offload(io_parms)) {
4111 struct smbd_buffer_descriptor_v1 *v1;
4112 bool need_invalidate = server->dialect == SMB30_PROT_ID;
4114 rdata->mr = smbd_register_mr(server->smbd_conn, &rdata->iter,
4115 true, need_invalidate);
4119 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
4120 if (need_invalidate)
4121 req->Channel = SMB2_CHANNEL_RDMA_V1;
4122 req->ReadChannelInfoOffset =
4123 cpu_to_le16(offsetof(struct smb2_read_req, Buffer));
4124 req->ReadChannelInfoLength =
4125 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
4126 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
4127 v1->offset = cpu_to_le64(rdata->mr->mr->iova);
4128 v1->token = cpu_to_le32(rdata->mr->mr->rkey);
4129 v1->length = cpu_to_le32(rdata->mr->mr->length);
4131 *total_len += sizeof(*v1) - 1;
4134 if (request_type & CHAINED_REQUEST) {
4135 if (!(request_type & END_OF_CHAIN)) {
4136 /* next 8-byte aligned request */
4137 *total_len = ALIGN(*total_len, 8);
4138 shdr->NextCommand = cpu_to_le32(*total_len);
4139 } else /* END_OF_CHAIN */
4140 shdr->NextCommand = 0;
4141 if (request_type & RELATED_REQUEST) {
4142 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
4144 * Related requests use info from previous read request
4147 shdr->SessionId = cpu_to_le64(0xFFFFFFFFFFFFFFFF);
4148 shdr->Id.SyncId.TreeId = cpu_to_le32(0xFFFFFFFF);
4149 req->PersistentFileId = (u64)-1;
4150 req->VolatileFileId = (u64)-1;
4153 if (remaining_bytes > io_parms->length)
4154 req->RemainingBytes = cpu_to_le32(remaining_bytes);
4156 req->RemainingBytes = 0;
4163 smb2_readv_callback(struct mid_q_entry *mid)
4165 struct cifs_readdata *rdata = mid->callback_data;
4166 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
4167 struct TCP_Server_Info *server = rdata->server;
4168 struct smb2_hdr *shdr =
4169 (struct smb2_hdr *)rdata->iov[0].iov_base;
4170 struct cifs_credits credits = { .value = 0, .instance = 0 };
4171 struct smb_rqst rqst = { .rq_iov = &rdata->iov[1], .rq_nvec = 1 };
4173 if (rdata->got_bytes) {
4174 rqst.rq_iter = rdata->iter;
4175 rqst.rq_iter_size = iov_iter_count(&rdata->iter);
4178 WARN_ONCE(rdata->server != mid->server,
4179 "rdata server %p != mid server %p",
4180 rdata->server, mid->server);
4182 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
4183 __func__, mid->mid, mid->mid_state, rdata->result,
4186 switch (mid->mid_state) {
4187 case MID_RESPONSE_RECEIVED:
4188 credits.value = le16_to_cpu(shdr->CreditRequest);
4189 credits.instance = server->reconnect_instance;
4190 /* result already set, check signature */
4191 if (server->sign && !mid->decrypted) {
4194 iov_iter_revert(&rqst.rq_iter, rdata->got_bytes);
4195 iov_iter_truncate(&rqst.rq_iter, rdata->got_bytes);
4196 rc = smb2_verify_signature(&rqst, server);
4198 cifs_tcon_dbg(VFS, "SMB signature verification returned error = %d\n",
4201 /* FIXME: should this be counted toward the initiating task? */
4202 task_io_account_read(rdata->got_bytes);
4203 cifs_stats_bytes_read(tcon, rdata->got_bytes);
4205 case MID_REQUEST_SUBMITTED:
4206 case MID_RETRY_NEEDED:
4207 rdata->result = -EAGAIN;
4208 if (server->sign && rdata->got_bytes)
4209 /* reset bytes number since we can not check a sign */
4210 rdata->got_bytes = 0;
4211 /* FIXME: should this be counted toward the initiating task? */
4212 task_io_account_read(rdata->got_bytes);
4213 cifs_stats_bytes_read(tcon, rdata->got_bytes);
4215 case MID_RESPONSE_MALFORMED:
4216 credits.value = le16_to_cpu(shdr->CreditRequest);
4217 credits.instance = server->reconnect_instance;
4220 rdata->result = -EIO;
4222 #ifdef CONFIG_CIFS_SMB_DIRECT
4224 * If this rdata has a memmory registered, the MR can be freed
4225 * MR needs to be freed as soon as I/O finishes to prevent deadlock
4226 * because they have limited number and are used for future I/Os
4229 smbd_deregister_mr(rdata->mr);
4233 if (rdata->result && rdata->result != -ENODATA) {
4234 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
4235 trace_smb3_read_err(0 /* xid */,
4236 rdata->cfile->fid.persistent_fid,
4237 tcon->tid, tcon->ses->Suid, rdata->offset,
4238 rdata->bytes, rdata->result);
4240 trace_smb3_read_done(0 /* xid */,
4241 rdata->cfile->fid.persistent_fid,
4242 tcon->tid, tcon->ses->Suid,
4243 rdata->offset, rdata->got_bytes);
4245 queue_work(cifsiod_wq, &rdata->work);
4247 add_credits(server, &credits, 0);
4250 /* smb2_async_readv - send an async read, and set up mid to handle result */
4252 smb2_async_readv(struct cifs_readdata *rdata)
4256 struct smb2_hdr *shdr;
4257 struct cifs_io_parms io_parms;
4258 struct smb_rqst rqst = { .rq_iov = rdata->iov,
4260 struct TCP_Server_Info *server;
4261 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
4262 unsigned int total_len;
4265 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
4266 __func__, rdata->offset, rdata->bytes);
4269 rdata->server = cifs_pick_channel(tcon->ses);
4271 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
4272 io_parms.server = server = rdata->server;
4273 io_parms.offset = rdata->offset;
4274 io_parms.length = rdata->bytes;
4275 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
4276 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
4277 io_parms.pid = rdata->pid;
4279 rc = smb2_new_read_req(
4280 (void **) &buf, &total_len, &io_parms, rdata, 0, 0);
4284 if (smb3_encryption_required(io_parms.tcon))
4285 flags |= CIFS_TRANSFORM_REQ;
4287 rdata->iov[0].iov_base = buf;
4288 rdata->iov[0].iov_len = total_len;
4290 shdr = (struct smb2_hdr *)buf;
4292 if (rdata->credits.value > 0) {
4293 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
4294 SMB2_MAX_BUFFER_SIZE));
4295 credit_request = le16_to_cpu(shdr->CreditCharge) + 8;
4296 if (server->credits >= server->max_credits)
4297 shdr->CreditRequest = cpu_to_le16(0);
4299 shdr->CreditRequest = cpu_to_le16(
4300 min_t(int, server->max_credits -
4301 server->credits, credit_request));
4303 rc = adjust_credits(server, &rdata->credits, rdata->bytes);
4305 goto async_readv_out;
4307 flags |= CIFS_HAS_CREDITS;
4310 kref_get(&rdata->refcount);
4311 rc = cifs_call_async(server, &rqst,
4312 cifs_readv_receive, smb2_readv_callback,
4313 smb3_handle_read_data, rdata, flags,
4316 kref_put(&rdata->refcount, cifs_readdata_release);
4317 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
4318 trace_smb3_read_err(0 /* xid */, io_parms.persistent_fid,
4320 io_parms.tcon->ses->Suid,
4321 io_parms.offset, io_parms.length, rc);
4325 cifs_small_buf_release(buf);
4330 SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
4331 unsigned int *nbytes, char **buf, int *buf_type)
4333 struct smb_rqst rqst;
4334 int resp_buftype, rc;
4335 struct smb2_read_req *req = NULL;
4336 struct smb2_read_rsp *rsp = NULL;
4338 struct kvec rsp_iov;
4339 unsigned int total_len;
4340 int flags = CIFS_LOG_ERROR;
4341 struct cifs_ses *ses = io_parms->tcon->ses;
4343 if (!io_parms->server)
4344 io_parms->server = cifs_pick_channel(io_parms->tcon->ses);
4347 rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0);
4351 if (smb3_encryption_required(io_parms->tcon))
4352 flags |= CIFS_TRANSFORM_REQ;
4354 iov[0].iov_base = (char *)req;
4355 iov[0].iov_len = total_len;
4357 memset(&rqst, 0, sizeof(struct smb_rqst));
4361 rc = cifs_send_recv(xid, ses, io_parms->server,
4362 &rqst, &resp_buftype, flags, &rsp_iov);
4363 rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
4366 if (rc != -ENODATA) {
4367 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
4368 cifs_dbg(VFS, "Send error in read = %d\n", rc);
4369 trace_smb3_read_err(xid,
4370 req->PersistentFileId,
4371 io_parms->tcon->tid, ses->Suid,
4372 io_parms->offset, io_parms->length,
4375 trace_smb3_read_done(xid, req->PersistentFileId, io_parms->tcon->tid,
4376 ses->Suid, io_parms->offset, 0);
4377 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
4378 cifs_small_buf_release(req);
4379 return rc == -ENODATA ? 0 : rc;
4381 trace_smb3_read_done(xid,
4382 req->PersistentFileId,
4383 io_parms->tcon->tid, ses->Suid,
4384 io_parms->offset, io_parms->length);
4386 cifs_small_buf_release(req);
4388 *nbytes = le32_to_cpu(rsp->DataLength);
4389 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
4390 (*nbytes > io_parms->length)) {
4391 cifs_dbg(FYI, "bad length %d for count %d\n",
4392 *nbytes, io_parms->length);
4398 memcpy(*buf, (char *)rsp + rsp->DataOffset, *nbytes);
4399 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
4400 } else if (resp_buftype != CIFS_NO_BUFFER) {
4401 *buf = rsp_iov.iov_base;
4402 if (resp_buftype == CIFS_SMALL_BUFFER)
4403 *buf_type = CIFS_SMALL_BUFFER;
4404 else if (resp_buftype == CIFS_LARGE_BUFFER)
4405 *buf_type = CIFS_LARGE_BUFFER;
4411 * Check the mid_state and signature on received buffer (if any), and queue the
4412 * workqueue completion task.
4415 smb2_writev_callback(struct mid_q_entry *mid)
4417 struct cifs_writedata *wdata = mid->callback_data;
4418 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
4419 struct TCP_Server_Info *server = wdata->server;
4420 unsigned int written;
4421 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
4422 struct cifs_credits credits = { .value = 0, .instance = 0 };
4424 WARN_ONCE(wdata->server != mid->server,
4425 "wdata server %p != mid server %p",
4426 wdata->server, mid->server);
4428 switch (mid->mid_state) {
4429 case MID_RESPONSE_RECEIVED:
4430 credits.value = le16_to_cpu(rsp->hdr.CreditRequest);
4431 credits.instance = server->reconnect_instance;
4432 wdata->result = smb2_check_receive(mid, server, 0);
4433 if (wdata->result != 0)
4436 written = le32_to_cpu(rsp->DataLength);
4438 * Mask off high 16 bits when bytes written as returned
4439 * by the server is greater than bytes requested by the
4440 * client. OS/2 servers are known to set incorrect
4443 if (written > wdata->bytes)
4446 if (written < wdata->bytes)
4447 wdata->result = -ENOSPC;
4449 wdata->bytes = written;
4451 case MID_REQUEST_SUBMITTED:
4452 case MID_RETRY_NEEDED:
4453 wdata->result = -EAGAIN;
4455 case MID_RESPONSE_MALFORMED:
4456 credits.value = le16_to_cpu(rsp->hdr.CreditRequest);
4457 credits.instance = server->reconnect_instance;
4460 wdata->result = -EIO;
4463 #ifdef CONFIG_CIFS_SMB_DIRECT
4465 * If this wdata has a memory registered, the MR can be freed
4466 * The number of MRs available is limited, it's important to recover
4467 * used MR as soon as I/O is finished. Hold MR longer in the later
4468 * I/O process can possibly result in I/O deadlock due to lack of MR
4469 * to send request on I/O retry
4472 smbd_deregister_mr(wdata->mr);
4476 if (wdata->result) {
4477 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
4478 trace_smb3_write_err(0 /* no xid */,
4479 wdata->cfile->fid.persistent_fid,
4480 tcon->tid, tcon->ses->Suid, wdata->offset,
4481 wdata->bytes, wdata->result);
4482 if (wdata->result == -ENOSPC)
4483 pr_warn_once("Out of space writing to %s\n",
4486 trace_smb3_write_done(0 /* no xid */,
4487 wdata->cfile->fid.persistent_fid,
4488 tcon->tid, tcon->ses->Suid,
4489 wdata->offset, wdata->bytes);
4491 queue_work(cifsiod_wq, &wdata->work);
4493 add_credits(server, &credits, 0);
4496 /* smb2_async_writev - send an async write, and set up mid to handle result */
4498 smb2_async_writev(struct cifs_writedata *wdata,
4499 void (*release)(struct kref *kref))
4501 int rc = -EACCES, flags = 0;
4502 struct smb2_write_req *req = NULL;
4503 struct smb2_hdr *shdr;
4504 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
4505 struct TCP_Server_Info *server = wdata->server;
4507 struct smb_rqst rqst = { };
4508 unsigned int total_len;
4509 struct cifs_io_parms _io_parms;
4510 struct cifs_io_parms *io_parms = NULL;
4514 server = wdata->server = cifs_pick_channel(tcon->ses);
4517 * in future we may get cifs_io_parms passed in from the caller,
4518 * but for now we construct it here...
4520 _io_parms = (struct cifs_io_parms) {
4523 .offset = wdata->offset,
4524 .length = wdata->bytes,
4525 .persistent_fid = wdata->cfile->fid.persistent_fid,
4526 .volatile_fid = wdata->cfile->fid.volatile_fid,
4529 io_parms = &_io_parms;
4531 rc = smb2_plain_req_init(SMB2_WRITE, tcon, server,
4532 (void **) &req, &total_len);
4536 if (smb3_encryption_required(tcon))
4537 flags |= CIFS_TRANSFORM_REQ;
4539 shdr = (struct smb2_hdr *)req;
4540 shdr->Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid);
4542 req->PersistentFileId = io_parms->persistent_fid;
4543 req->VolatileFileId = io_parms->volatile_fid;
4544 req->WriteChannelInfoOffset = 0;
4545 req->WriteChannelInfoLength = 0;
4546 req->Channel = SMB2_CHANNEL_NONE;
4547 req->Offset = cpu_to_le64(io_parms->offset);
4548 req->DataOffset = cpu_to_le16(
4549 offsetof(struct smb2_write_req, Buffer));
4550 req->RemainingBytes = 0;
4552 trace_smb3_write_enter(0 /* xid */,
4553 io_parms->persistent_fid,
4554 io_parms->tcon->tid,
4555 io_parms->tcon->ses->Suid,
4559 #ifdef CONFIG_CIFS_SMB_DIRECT
4561 * If we want to do a server RDMA read, fill in and append
4562 * smbd_buffer_descriptor_v1 to the end of write request
4564 if (smb3_use_rdma_offload(io_parms)) {
4565 struct smbd_buffer_descriptor_v1 *v1;
4566 size_t data_size = iov_iter_count(&wdata->iter);
4567 bool need_invalidate = server->dialect == SMB30_PROT_ID;
4569 wdata->mr = smbd_register_mr(server->smbd_conn, &wdata->iter,
4570 false, need_invalidate);
4573 goto async_writev_out;
4576 req->DataOffset = 0;
4577 req->RemainingBytes = cpu_to_le32(data_size);
4578 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
4579 if (need_invalidate)
4580 req->Channel = SMB2_CHANNEL_RDMA_V1;
4581 req->WriteChannelInfoOffset =
4582 cpu_to_le16(offsetof(struct smb2_write_req, Buffer));
4583 req->WriteChannelInfoLength =
4584 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
4585 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
4586 v1->offset = cpu_to_le64(wdata->mr->mr->iova);
4587 v1->token = cpu_to_le32(wdata->mr->mr->rkey);
4588 v1->length = cpu_to_le32(wdata->mr->mr->length);
4591 iov[0].iov_len = total_len - 1;
4592 iov[0].iov_base = (char *)req;
4596 rqst.rq_iter = wdata->iter;
4597 rqst.rq_iter_size = iov_iter_count(&rqst.rq_iter);
4598 #ifdef CONFIG_CIFS_SMB_DIRECT
4600 iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1);
4602 cifs_dbg(FYI, "async write at %llu %u bytes iter=%zx\n",
4603 io_parms->offset, io_parms->length, iov_iter_count(&rqst.rq_iter));
4605 #ifdef CONFIG_CIFS_SMB_DIRECT
4606 /* For RDMA read, I/O size is in RemainingBytes not in Length */
4608 req->Length = cpu_to_le32(io_parms->length);
4610 req->Length = cpu_to_le32(io_parms->length);
4613 if (wdata->credits.value > 0) {
4614 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
4615 SMB2_MAX_BUFFER_SIZE));
4616 credit_request = le16_to_cpu(shdr->CreditCharge) + 8;
4617 if (server->credits >= server->max_credits)
4618 shdr->CreditRequest = cpu_to_le16(0);
4620 shdr->CreditRequest = cpu_to_le16(
4621 min_t(int, server->max_credits -
4622 server->credits, credit_request));
4624 rc = adjust_credits(server, &wdata->credits, io_parms->length);
4626 goto async_writev_out;
4628 flags |= CIFS_HAS_CREDITS;
4631 kref_get(&wdata->refcount);
4632 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
4633 wdata, flags, &wdata->credits);
4636 trace_smb3_write_err(0 /* no xid */,
4637 io_parms->persistent_fid,
4638 io_parms->tcon->tid,
4639 io_parms->tcon->ses->Suid,
4643 kref_put(&wdata->refcount, release);
4644 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
4648 cifs_small_buf_release(req);
4653 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
4654 * The length field from io_parms must be at least 1 and indicates a number of
4655 * elements with data to write that begins with position 1 in iov array. All
4656 * data length is specified by count.
4659 SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
4660 unsigned int *nbytes, struct kvec *iov, int n_vec)
4662 struct smb_rqst rqst;
4664 struct smb2_write_req *req = NULL;
4665 struct smb2_write_rsp *rsp = NULL;
4667 struct kvec rsp_iov;
4669 unsigned int total_len;
4670 struct TCP_Server_Info *server;
4677 if (!io_parms->server)
4678 io_parms->server = cifs_pick_channel(io_parms->tcon->ses);
4679 server = io_parms->server;
4681 return -ECONNABORTED;
4683 rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, server,
4684 (void **) &req, &total_len);
4688 if (smb3_encryption_required(io_parms->tcon))
4689 flags |= CIFS_TRANSFORM_REQ;
4691 req->hdr.Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid);
4693 req->PersistentFileId = io_parms->persistent_fid;
4694 req->VolatileFileId = io_parms->volatile_fid;
4695 req->WriteChannelInfoOffset = 0;
4696 req->WriteChannelInfoLength = 0;
4698 req->Length = cpu_to_le32(io_parms->length);
4699 req->Offset = cpu_to_le64(io_parms->offset);
4700 req->DataOffset = cpu_to_le16(
4701 offsetof(struct smb2_write_req, Buffer));
4702 req->RemainingBytes = 0;
4704 trace_smb3_write_enter(xid, io_parms->persistent_fid,
4705 io_parms->tcon->tid, io_parms->tcon->ses->Suid,
4706 io_parms->offset, io_parms->length);
4708 iov[0].iov_base = (char *)req;
4710 iov[0].iov_len = total_len - 1;
4712 memset(&rqst, 0, sizeof(struct smb_rqst));
4714 rqst.rq_nvec = n_vec + 1;
4716 rc = cifs_send_recv(xid, io_parms->tcon->ses, server,
4718 &resp_buftype, flags, &rsp_iov);
4719 rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
4722 trace_smb3_write_err(xid,
4723 req->PersistentFileId,
4724 io_parms->tcon->tid,
4725 io_parms->tcon->ses->Suid,
4726 io_parms->offset, io_parms->length, rc);
4727 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
4728 cifs_dbg(VFS, "Send error in write = %d\n", rc);
4730 *nbytes = le32_to_cpu(rsp->DataLength);
4731 trace_smb3_write_done(xid,
4732 req->PersistentFileId,
4733 io_parms->tcon->tid,
4734 io_parms->tcon->ses->Suid,
4735 io_parms->offset, *nbytes);
4738 cifs_small_buf_release(req);
4739 free_rsp_buf(resp_buftype, rsp);
4743 int posix_info_sid_size(const void *beg, const void *end)
4751 subauth = *(u8 *)(beg+1);
4752 if (subauth < 1 || subauth > 15)
4755 total = 1 + 1 + 6 + 4*subauth;
4756 if (beg + total > end)
4762 int posix_info_parse(const void *beg, const void *end,
4763 struct smb2_posix_info_parsed *out)
4767 int owner_len, group_len;
4769 const void *owner_sid;
4770 const void *group_sid;
4773 /* if no end bound given, assume payload to be correct */
4775 const struct smb2_posix_info *p = beg;
4777 end = beg + le32_to_cpu(p->NextEntryOffset);
4778 /* last element will have a 0 offset, pick a sensible bound */
4783 /* check base buf */
4784 if (beg + sizeof(struct smb2_posix_info) > end)
4786 total_len = sizeof(struct smb2_posix_info);
4788 /* check owner sid */
4789 owner_sid = beg + total_len;
4790 owner_len = posix_info_sid_size(owner_sid, end);
4793 total_len += owner_len;
4795 /* check group sid */
4796 group_sid = beg + total_len;
4797 group_len = posix_info_sid_size(group_sid, end);
4800 total_len += group_len;
4802 /* check name len */
4803 if (beg + total_len + 4 > end)
4805 name_len = le32_to_cpu(*(__le32 *)(beg + total_len));
4806 if (name_len < 1 || name_len > 0xFFFF)
4811 name = beg + total_len;
4812 if (name + name_len > end)
4814 total_len += name_len;
4818 out->size = total_len;
4819 out->name_len = name_len;
4821 memcpy(&out->owner, owner_sid, owner_len);
4822 memcpy(&out->group, group_sid, group_len);
4827 static int posix_info_extra_size(const void *beg, const void *end)
4829 int len = posix_info_parse(beg, end, NULL);
4833 return len - sizeof(struct smb2_posix_info);
4837 num_entries(int infotype, char *bufstart, char *end_of_buf, char **lastentry,
4841 unsigned int entrycount = 0;
4842 unsigned int next_offset = 0;
4844 FILE_DIRECTORY_INFO *dir_info;
4846 if (bufstart == NULL)
4849 entryptr = bufstart;
4852 if (entryptr + next_offset < entryptr ||
4853 entryptr + next_offset > end_of_buf ||
4854 entryptr + next_offset + size > end_of_buf) {
4855 cifs_dbg(VFS, "malformed search entry would overflow\n");
4859 entryptr = entryptr + next_offset;
4860 dir_info = (FILE_DIRECTORY_INFO *)entryptr;
4862 if (infotype == SMB_FIND_FILE_POSIX_INFO)
4863 len = posix_info_extra_size(entryptr, end_of_buf);
4865 len = le32_to_cpu(dir_info->FileNameLength);
4868 entryptr + len < entryptr ||
4869 entryptr + len > end_of_buf ||
4870 entryptr + len + size > end_of_buf) {
4871 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
4876 *lastentry = entryptr;
4879 next_offset = le32_to_cpu(dir_info->NextEntryOffset);
4890 int SMB2_query_directory_init(const unsigned int xid,
4891 struct cifs_tcon *tcon,
4892 struct TCP_Server_Info *server,
4893 struct smb_rqst *rqst,
4894 u64 persistent_fid, u64 volatile_fid,
4895 int index, int info_level)
4897 struct smb2_query_directory_req *req;
4898 unsigned char *bufptr;
4899 __le16 asteriks = cpu_to_le16('*');
4900 unsigned int output_size = CIFSMaxBufSize -
4901 MAX_SMB2_CREATE_RESPONSE_SIZE -
4902 MAX_SMB2_CLOSE_RESPONSE_SIZE;
4903 unsigned int total_len;
4904 struct kvec *iov = rqst->rq_iov;
4907 rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, server,
4908 (void **) &req, &total_len);
4912 switch (info_level) {
4913 case SMB_FIND_FILE_DIRECTORY_INFO:
4914 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
4916 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
4917 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
4919 case SMB_FIND_FILE_POSIX_INFO:
4920 req->FileInformationClass = SMB_FIND_FILE_POSIX_INFO;
4923 cifs_tcon_dbg(VFS, "info level %u isn't supported\n",
4928 req->FileIndex = cpu_to_le32(index);
4929 req->PersistentFileId = persistent_fid;
4930 req->VolatileFileId = volatile_fid;
4933 bufptr = req->Buffer;
4934 memcpy(bufptr, &asteriks, len);
4936 req->FileNameOffset =
4937 cpu_to_le16(sizeof(struct smb2_query_directory_req));
4938 req->FileNameLength = cpu_to_le16(len);
4940 * BB could be 30 bytes or so longer if we used SMB2 specific
4941 * buffer lengths, but this is safe and close enough.
4943 output_size = min_t(unsigned int, output_size, server->maxBuf);
4944 output_size = min_t(unsigned int, output_size, 2 << 15);
4945 req->OutputBufferLength = cpu_to_le32(output_size);
4947 iov[0].iov_base = (char *)req;
4949 iov[0].iov_len = total_len - 1;
4951 iov[1].iov_base = (char *)(req->Buffer);
4952 iov[1].iov_len = len;
4954 trace_smb3_query_dir_enter(xid, persistent_fid, tcon->tid,
4955 tcon->ses->Suid, index, output_size);
4960 void SMB2_query_directory_free(struct smb_rqst *rqst)
4962 if (rqst && rqst->rq_iov) {
4963 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
4968 smb2_parse_query_directory(struct cifs_tcon *tcon,
4969 struct kvec *rsp_iov,
4971 struct cifs_search_info *srch_inf)
4973 struct smb2_query_directory_rsp *rsp;
4974 size_t info_buf_size;
4978 rsp = (struct smb2_query_directory_rsp *)rsp_iov->iov_base;
4980 switch (srch_inf->info_level) {
4981 case SMB_FIND_FILE_DIRECTORY_INFO:
4982 info_buf_size = sizeof(FILE_DIRECTORY_INFO);
4984 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
4985 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO);
4987 case SMB_FIND_FILE_POSIX_INFO:
4988 /* note that posix payload are variable size */
4989 info_buf_size = sizeof(struct smb2_posix_info);
4992 cifs_tcon_dbg(VFS, "info level %u isn't supported\n",
4993 srch_inf->info_level);
4997 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
4998 le32_to_cpu(rsp->OutputBufferLength), rsp_iov,
5001 cifs_tcon_dbg(VFS, "bad info payload");
5005 srch_inf->unicode = true;
5007 if (srch_inf->ntwrk_buf_start) {
5008 if (srch_inf->smallBuf)
5009 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
5011 cifs_buf_release(srch_inf->ntwrk_buf_start);
5013 srch_inf->ntwrk_buf_start = (char *)rsp;
5014 srch_inf->srch_entries_start = srch_inf->last_entry =
5015 (char *)rsp + le16_to_cpu(rsp->OutputBufferOffset);
5016 end_of_smb = rsp_iov->iov_len + (char *)rsp;
5018 srch_inf->entries_in_buffer = num_entries(
5019 srch_inf->info_level,
5020 srch_inf->srch_entries_start,
5022 &srch_inf->last_entry,
5025 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
5026 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
5027 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
5028 srch_inf->srch_entries_start, srch_inf->last_entry);
5029 if (resp_buftype == CIFS_LARGE_BUFFER)
5030 srch_inf->smallBuf = false;
5031 else if (resp_buftype == CIFS_SMALL_BUFFER)
5032 srch_inf->smallBuf = true;
5034 cifs_tcon_dbg(VFS, "Invalid search buffer type\n");
5040 SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
5041 u64 persistent_fid, u64 volatile_fid, int index,
5042 struct cifs_search_info *srch_inf)
5044 struct smb_rqst rqst;
5045 struct kvec iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
5046 struct smb2_query_directory_rsp *rsp = NULL;
5047 int resp_buftype = CIFS_NO_BUFFER;
5048 struct kvec rsp_iov;
5050 struct cifs_ses *ses = tcon->ses;
5051 struct TCP_Server_Info *server = cifs_pick_channel(ses);
5054 if (!ses || !(ses->server))
5057 if (smb3_encryption_required(tcon))
5058 flags |= CIFS_TRANSFORM_REQ;
5060 memset(&rqst, 0, sizeof(struct smb_rqst));
5061 memset(&iov, 0, sizeof(iov));
5063 rqst.rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
5065 rc = SMB2_query_directory_init(xid, tcon, server,
5066 &rqst, persistent_fid,
5067 volatile_fid, index,
5068 srch_inf->info_level);
5072 rc = cifs_send_recv(xid, ses, server,
5073 &rqst, &resp_buftype, flags, &rsp_iov);
5074 rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
5077 if (rc == -ENODATA &&
5078 rsp->hdr.Status == STATUS_NO_MORE_FILES) {
5079 trace_smb3_query_dir_done(xid, persistent_fid,
5080 tcon->tid, tcon->ses->Suid, index, 0);
5081 srch_inf->endOfSearch = true;
5084 trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
5085 tcon->ses->Suid, index, 0, rc);
5086 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
5091 rc = smb2_parse_query_directory(tcon, &rsp_iov, resp_buftype,
5094 trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
5095 tcon->ses->Suid, index, 0, rc);
5098 resp_buftype = CIFS_NO_BUFFER;
5100 trace_smb3_query_dir_done(xid, persistent_fid, tcon->tid,
5101 tcon->ses->Suid, index, srch_inf->entries_in_buffer);
5104 SMB2_query_directory_free(&rqst);
5105 free_rsp_buf(resp_buftype, rsp);
5110 SMB2_set_info_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
5111 struct smb_rqst *rqst,
5112 u64 persistent_fid, u64 volatile_fid, u32 pid,
5113 u8 info_class, u8 info_type, u32 additional_info,
5114 void **data, unsigned int *size)
5116 struct smb2_set_info_req *req;
5117 struct kvec *iov = rqst->rq_iov;
5118 unsigned int i, total_len;
5121 rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, server,
5122 (void **) &req, &total_len);
5126 req->hdr.Id.SyncId.ProcessId = cpu_to_le32(pid);
5127 req->InfoType = info_type;
5128 req->FileInfoClass = info_class;
5129 req->PersistentFileId = persistent_fid;
5130 req->VolatileFileId = volatile_fid;
5131 req->AdditionalInformation = cpu_to_le32(additional_info);
5133 req->BufferOffset = cpu_to_le16(sizeof(struct smb2_set_info_req));
5134 req->BufferLength = cpu_to_le32(*size);
5136 memcpy(req->Buffer, *data, *size);
5139 iov[0].iov_base = (char *)req;
5141 iov[0].iov_len = total_len - 1;
5143 for (i = 1; i < rqst->rq_nvec; i++) {
5144 le32_add_cpu(&req->BufferLength, size[i]);
5145 iov[i].iov_base = (char *)data[i];
5146 iov[i].iov_len = size[i];
5153 SMB2_set_info_free(struct smb_rqst *rqst)
5155 if (rqst && rqst->rq_iov)
5156 cifs_buf_release(rqst->rq_iov[0].iov_base); /* request */
5160 send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
5161 u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
5162 u8 info_type, u32 additional_info, unsigned int num,
5163 void **data, unsigned int *size)
5165 struct smb_rqst rqst;
5166 struct smb2_set_info_rsp *rsp = NULL;
5168 struct kvec rsp_iov;
5171 struct cifs_ses *ses = tcon->ses;
5172 struct TCP_Server_Info *server = cifs_pick_channel(ses);
5175 if (!ses || !server)
5181 if (smb3_encryption_required(tcon))
5182 flags |= CIFS_TRANSFORM_REQ;
5184 iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL);
5188 memset(&rqst, 0, sizeof(struct smb_rqst));
5192 rc = SMB2_set_info_init(tcon, server,
5193 &rqst, persistent_fid, volatile_fid, pid,
5194 info_class, info_type, additional_info,
5202 rc = cifs_send_recv(xid, ses, server,
5203 &rqst, &resp_buftype, flags,
5205 SMB2_set_info_free(&rqst);
5206 rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
5209 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
5210 trace_smb3_set_info_err(xid, persistent_fid, tcon->tid,
5211 ses->Suid, info_class, (__u32)info_type, rc);
5214 free_rsp_buf(resp_buftype, rsp);
5220 SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
5221 u64 volatile_fid, u32 pid, __le64 *eof)
5223 struct smb2_file_eof_info info;
5227 info.EndOfFile = *eof;
5230 size = sizeof(struct smb2_file_eof_info);
5232 trace_smb3_set_eof(xid, persistent_fid, tcon->tid, tcon->ses->Suid, le64_to_cpu(*eof));
5234 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
5235 pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE,
5236 0, 1, &data, &size);
5240 SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
5241 u64 persistent_fid, u64 volatile_fid,
5242 struct cifs_ntsd *pnntsd, int pacllen, int aclflag)
5244 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
5245 current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag,
5246 1, (void **)&pnntsd, &pacllen);
5250 SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
5251 u64 persistent_fid, u64 volatile_fid,
5252 struct smb2_file_full_ea_info *buf, int len)
5254 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
5255 current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE,
5256 0, 1, (void **)&buf, &len);
5260 SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
5261 const u64 persistent_fid, const u64 volatile_fid,
5264 struct smb_rqst rqst;
5266 struct smb2_oplock_break *req = NULL;
5267 struct cifs_ses *ses = tcon->ses;
5268 struct TCP_Server_Info *server = cifs_pick_channel(ses);
5269 int flags = CIFS_OBREAK_OP;
5270 unsigned int total_len;
5272 struct kvec rsp_iov;
5275 cifs_dbg(FYI, "SMB2_oplock_break\n");
5276 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, server,
5277 (void **) &req, &total_len);
5281 if (smb3_encryption_required(tcon))
5282 flags |= CIFS_TRANSFORM_REQ;
5284 req->VolatileFid = volatile_fid;
5285 req->PersistentFid = persistent_fid;
5286 req->OplockLevel = oplock_level;
5287 req->hdr.CreditRequest = cpu_to_le16(1);
5289 flags |= CIFS_NO_RSP_BUF;
5291 iov[0].iov_base = (char *)req;
5292 iov[0].iov_len = total_len;
5294 memset(&rqst, 0, sizeof(struct smb_rqst));
5298 rc = cifs_send_recv(xid, ses, server,
5299 &rqst, &resp_buf_type, flags, &rsp_iov);
5300 cifs_small_buf_release(req);
5303 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
5304 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
5311 smb2_copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
5312 struct kstatfs *kst)
5314 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
5315 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
5316 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
5317 kst->f_bfree = kst->f_bavail =
5318 le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
5323 copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO *response_data,
5324 struct kstatfs *kst)
5326 kst->f_bsize = le32_to_cpu(response_data->BlockSize);
5327 kst->f_blocks = le64_to_cpu(response_data->TotalBlocks);
5328 kst->f_bfree = le64_to_cpu(response_data->BlocksAvail);
5329 if (response_data->UserBlocksAvail == cpu_to_le64(-1))
5330 kst->f_bavail = kst->f_bfree;
5332 kst->f_bavail = le64_to_cpu(response_data->UserBlocksAvail);
5333 if (response_data->TotalFileNodes != cpu_to_le64(-1))
5334 kst->f_files = le64_to_cpu(response_data->TotalFileNodes);
5335 if (response_data->FreeFileNodes != cpu_to_le64(-1))
5336 kst->f_ffree = le64_to_cpu(response_data->FreeFileNodes);
5342 build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon,
5343 struct TCP_Server_Info *server,
5344 int level, int outbuf_len, u64 persistent_fid,
5348 struct smb2_query_info_req *req;
5349 unsigned int total_len;
5351 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
5353 if ((tcon->ses == NULL) || server == NULL)
5356 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, server,
5357 (void **) &req, &total_len);
5361 req->InfoType = SMB2_O_INFO_FILESYSTEM;
5362 req->FileInfoClass = level;
5363 req->PersistentFileId = persistent_fid;
5364 req->VolatileFileId = volatile_fid;
5366 req->InputBufferOffset =
5367 cpu_to_le16(sizeof(struct smb2_query_info_req));
5368 req->OutputBufferLength = cpu_to_le32(
5369 outbuf_len + sizeof(struct smb2_query_info_rsp));
5371 iov->iov_base = (char *)req;
5372 iov->iov_len = total_len;
5377 SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon,
5378 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
5380 struct smb_rqst rqst;
5381 struct smb2_query_info_rsp *rsp = NULL;
5383 struct kvec rsp_iov;
5386 struct cifs_ses *ses = tcon->ses;
5387 struct TCP_Server_Info *server = cifs_pick_channel(ses);
5388 FILE_SYSTEM_POSIX_INFO *info = NULL;
5391 rc = build_qfs_info_req(&iov, tcon, server,
5392 FS_POSIX_INFORMATION,
5393 sizeof(FILE_SYSTEM_POSIX_INFO),
5394 persistent_fid, volatile_fid);
5398 if (smb3_encryption_required(tcon))
5399 flags |= CIFS_TRANSFORM_REQ;
5401 memset(&rqst, 0, sizeof(struct smb_rqst));
5405 rc = cifs_send_recv(xid, ses, server,
5406 &rqst, &resp_buftype, flags, &rsp_iov);
5407 cifs_small_buf_release(iov.iov_base);
5409 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
5410 goto posix_qfsinf_exit;
5412 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
5414 info = (FILE_SYSTEM_POSIX_INFO *)(
5415 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
5416 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
5417 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
5418 sizeof(FILE_SYSTEM_POSIX_INFO));
5420 copy_posix_fs_info_to_kstatfs(info, fsdata);
5423 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
5428 SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
5429 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
5431 struct smb_rqst rqst;
5432 struct smb2_query_info_rsp *rsp = NULL;
5434 struct kvec rsp_iov;
5437 struct cifs_ses *ses = tcon->ses;
5438 struct TCP_Server_Info *server = cifs_pick_channel(ses);
5439 struct smb2_fs_full_size_info *info = NULL;
5442 rc = build_qfs_info_req(&iov, tcon, server,
5443 FS_FULL_SIZE_INFORMATION,
5444 sizeof(struct smb2_fs_full_size_info),
5445 persistent_fid, volatile_fid);
5449 if (smb3_encryption_required(tcon))
5450 flags |= CIFS_TRANSFORM_REQ;
5452 memset(&rqst, 0, sizeof(struct smb_rqst));
5456 rc = cifs_send_recv(xid, ses, server,
5457 &rqst, &resp_buftype, flags, &rsp_iov);
5458 cifs_small_buf_release(iov.iov_base);
5460 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
5463 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
5465 info = (struct smb2_fs_full_size_info *)(
5466 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
5467 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
5468 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
5469 sizeof(struct smb2_fs_full_size_info));
5471 smb2_copy_fs_info_to_kstatfs(info, fsdata);
5474 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
5479 SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
5480 u64 persistent_fid, u64 volatile_fid, int level)
5482 struct smb_rqst rqst;
5483 struct smb2_query_info_rsp *rsp = NULL;
5485 struct kvec rsp_iov;
5487 int resp_buftype, max_len, min_len;
5488 struct cifs_ses *ses = tcon->ses;
5489 struct TCP_Server_Info *server = cifs_pick_channel(ses);
5490 unsigned int rsp_len, offset;
5493 if (level == FS_DEVICE_INFORMATION) {
5494 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
5495 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
5496 } else if (level == FS_ATTRIBUTE_INFORMATION) {
5497 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
5498 min_len = MIN_FS_ATTR_INFO_SIZE;
5499 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
5500 max_len = sizeof(struct smb3_fs_ss_info);
5501 min_len = sizeof(struct smb3_fs_ss_info);
5502 } else if (level == FS_VOLUME_INFORMATION) {
5503 max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN;
5504 min_len = sizeof(struct smb3_fs_vol_info);
5506 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
5510 rc = build_qfs_info_req(&iov, tcon, server,
5512 persistent_fid, volatile_fid);
5516 if (smb3_encryption_required(tcon))
5517 flags |= CIFS_TRANSFORM_REQ;
5519 memset(&rqst, 0, sizeof(struct smb_rqst));
5523 rc = cifs_send_recv(xid, ses, server,
5524 &rqst, &resp_buftype, flags, &rsp_iov);
5525 cifs_small_buf_release(iov.iov_base);
5527 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
5530 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
5532 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
5533 offset = le16_to_cpu(rsp->OutputBufferOffset);
5534 rc = smb2_validate_iov(offset, rsp_len, &rsp_iov, min_len);
5538 if (level == FS_ATTRIBUTE_INFORMATION)
5539 memcpy(&tcon->fsAttrInfo, offset
5540 + (char *)rsp, min_t(unsigned int,
5542 else if (level == FS_DEVICE_INFORMATION)
5543 memcpy(&tcon->fsDevInfo, offset
5544 + (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO));
5545 else if (level == FS_SECTOR_SIZE_INFORMATION) {
5546 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
5547 (offset + (char *)rsp);
5548 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
5549 tcon->perf_sector_size =
5550 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
5551 } else if (level == FS_VOLUME_INFORMATION) {
5552 struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *)
5553 (offset + (char *)rsp);
5554 tcon->vol_serial_number = vol_info->VolumeSerialNumber;
5555 tcon->vol_create_time = vol_info->VolumeCreationTime;
5559 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
5564 smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
5565 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
5566 const __u32 num_lock, struct smb2_lock_element *buf)
5568 struct smb_rqst rqst;
5570 struct smb2_lock_req *req = NULL;
5572 struct kvec rsp_iov;
5575 int flags = CIFS_NO_RSP_BUF;
5576 unsigned int total_len;
5577 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
5579 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
5581 rc = smb2_plain_req_init(SMB2_LOCK, tcon, server,
5582 (void **) &req, &total_len);
5586 if (smb3_encryption_required(tcon))
5587 flags |= CIFS_TRANSFORM_REQ;
5589 req->hdr.Id.SyncId.ProcessId = cpu_to_le32(pid);
5590 req->LockCount = cpu_to_le16(num_lock);
5592 req->PersistentFileId = persist_fid;
5593 req->VolatileFileId = volatile_fid;
5595 count = num_lock * sizeof(struct smb2_lock_element);
5597 iov[0].iov_base = (char *)req;
5598 iov[0].iov_len = total_len - sizeof(struct smb2_lock_element);
5599 iov[1].iov_base = (char *)buf;
5600 iov[1].iov_len = count;
5602 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
5604 memset(&rqst, 0, sizeof(struct smb_rqst));
5608 rc = cifs_send_recv(xid, tcon->ses, server,
5609 &rqst, &resp_buf_type, flags,
5611 cifs_small_buf_release(req);
5613 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
5614 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
5615 trace_smb3_lock_err(xid, persist_fid, tcon->tid,
5616 tcon->ses->Suid, rc);
5623 SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
5624 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
5625 const __u64 length, const __u64 offset, const __u32 lock_flags,
5628 struct smb2_lock_element lock;
5630 lock.Offset = cpu_to_le64(offset);
5631 lock.Length = cpu_to_le64(length);
5632 lock.Flags = cpu_to_le32(lock_flags);
5633 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
5634 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
5636 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
5640 SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
5641 __u8 *lease_key, const __le32 lease_state)
5643 struct smb_rqst rqst;
5645 struct smb2_lease_ack *req = NULL;
5646 struct cifs_ses *ses = tcon->ses;
5647 int flags = CIFS_OBREAK_OP;
5648 unsigned int total_len;
5650 struct kvec rsp_iov;
5652 __u64 *please_key_high;
5653 __u64 *please_key_low;
5654 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
5656 cifs_dbg(FYI, "SMB2_lease_break\n");
5657 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, server,
5658 (void **) &req, &total_len);
5662 if (smb3_encryption_required(tcon))
5663 flags |= CIFS_TRANSFORM_REQ;
5665 req->hdr.CreditRequest = cpu_to_le16(1);
5666 req->StructureSize = cpu_to_le16(36);
5669 memcpy(req->LeaseKey, lease_key, 16);
5670 req->LeaseState = lease_state;
5672 flags |= CIFS_NO_RSP_BUF;
5674 iov[0].iov_base = (char *)req;
5675 iov[0].iov_len = total_len;
5677 memset(&rqst, 0, sizeof(struct smb_rqst));
5681 rc = cifs_send_recv(xid, ses, server,
5682 &rqst, &resp_buf_type, flags, &rsp_iov);
5683 cifs_small_buf_release(req);
5685 please_key_low = (__u64 *)lease_key;
5686 please_key_high = (__u64 *)(lease_key+8);
5688 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
5689 trace_smb3_lease_err(le32_to_cpu(lease_state), tcon->tid,
5690 ses->Suid, *please_key_low, *please_key_high, rc);
5691 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
5693 trace_smb3_lease_done(le32_to_cpu(lease_state), tcon->tid,
5694 ses->Suid, *please_key_low, *please_key_high);