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 shdr->ProtocolId = SMB2_PROTO_NUMBER;
92 shdr->StructureSize = cpu_to_le16(64);
93 shdr->Command = smb2_cmd;
95 spin_lock(&server->req_lock);
96 /* Request up to 10 credits but don't go over the limit. */
97 if (server->credits >= server->max_credits)
98 shdr->CreditRequest = cpu_to_le16(0);
100 shdr->CreditRequest = cpu_to_le16(
101 min_t(int, server->max_credits -
102 server->credits, 10));
103 spin_unlock(&server->req_lock);
105 shdr->CreditRequest = cpu_to_le16(2);
107 shdr->Id.SyncId.ProcessId = cpu_to_le32((__u16)current->tgid);
112 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
113 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
114 if (server && (server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
115 shdr->CreditCharge = cpu_to_le16(1);
116 /* else CreditCharge MBZ */
118 shdr->Id.SyncId.TreeId = cpu_to_le32(tcon->tid);
119 /* Uid is not converted */
121 shdr->SessionId = cpu_to_le64(tcon->ses->Suid);
124 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
125 * to pass the path on the Open SMB prefixed by \\server\share.
126 * Not sure when we would need to do the augmented path (if ever) and
127 * setting this flag breaks the SMB2 open operation since it is
128 * illegal to send an empty path name (without \\server\share prefix)
129 * when the DFS flag is set in the SMB open header. We could
130 * consider setting the flag on all operations other than open
131 * but it is safer to net set it for now.
133 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
134 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
136 if (server && server->sign && !smb3_encryption_required(tcon))
137 shdr->Flags |= SMB2_FLAGS_SIGNED;
143 smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon,
144 struct TCP_Server_Info *server)
147 struct nls_table *nls_codepage;
148 struct cifs_ses *ses;
152 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
153 * check for tcp and smb session status done differently
154 * for those three - in the calling routine.
160 * Need to also skip SMB2_IOCTL because it is used for checking nested dfs links in
161 * cifs_tree_connect().
163 if (smb2_command == SMB2_TREE_CONNECT || smb2_command == SMB2_IOCTL)
166 spin_lock(&tcon->tc_lock);
167 if (tcon->status == TID_EXITING) {
169 * only tree disconnect, open, and write,
170 * (and ulogoff which does not have tcon)
171 * are allowed as we start force umount.
173 if ((smb2_command != SMB2_WRITE) &&
174 (smb2_command != SMB2_CREATE) &&
175 (smb2_command != SMB2_TREE_DISCONNECT)) {
176 spin_unlock(&tcon->tc_lock);
177 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
182 spin_unlock(&tcon->tc_lock);
183 if ((!tcon->ses) || (tcon->ses->ses_status == SES_EXITING) ||
184 (!tcon->ses->server) || !server)
188 retries = server->nr_targets;
191 * Give demultiplex thread up to 10 seconds to each target available for
192 * reconnect -- should be greater than cifs socket timeout which is 7
195 while (server->tcpStatus == CifsNeedReconnect) {
197 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
198 * here since they are implicitly done when session drops.
200 switch (smb2_command) {
202 * BB Should we keep oplock break and add flush to exceptions?
204 case SMB2_TREE_DISCONNECT:
207 case SMB2_OPLOCK_BREAK:
211 rc = wait_event_interruptible_timeout(server->response_q,
212 (server->tcpStatus != CifsNeedReconnect),
215 cifs_dbg(FYI, "%s: aborting reconnect due to a received signal by the process\n",
220 /* are we still trying to reconnect? */
221 spin_lock(&server->srv_lock);
222 if (server->tcpStatus != CifsNeedReconnect) {
223 spin_unlock(&server->srv_lock);
226 spin_unlock(&server->srv_lock);
228 if (retries && --retries)
232 * on "soft" mounts we wait once. Hard mounts keep
233 * retrying until process is killed or server comes
237 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
240 retries = server->nr_targets;
243 spin_lock(&ses->chan_lock);
244 if (!cifs_chan_needs_reconnect(ses, server) && !tcon->need_reconnect) {
245 spin_unlock(&ses->chan_lock);
248 spin_unlock(&ses->chan_lock);
249 cifs_dbg(FYI, "sess reconnect mask: 0x%lx, tcon reconnect: %d",
250 tcon->ses->chans_need_reconnect,
251 tcon->need_reconnect);
253 nls_codepage = load_nls_default();
256 * Recheck after acquire mutex. If another thread is negotiating
257 * and the server never sends an answer the socket will be closed
258 * and tcpStatus set to reconnect.
260 spin_lock(&server->srv_lock);
261 if (server->tcpStatus == CifsNeedReconnect) {
262 spin_unlock(&server->srv_lock);
266 spin_unlock(&server->srv_lock);
269 * need to prevent multiple threads trying to simultaneously
270 * reconnect the same SMB session
272 spin_lock(&ses->chan_lock);
273 if (!cifs_chan_needs_reconnect(ses, server)) {
274 spin_unlock(&ses->chan_lock);
276 /* this means that we only need to tree connect */
277 if (tcon->need_reconnect)
278 goto skip_sess_setup;
282 spin_unlock(&ses->chan_lock);
284 mutex_lock(&ses->session_mutex);
285 rc = cifs_negotiate_protocol(0, ses, server);
287 rc = cifs_setup_session(0, ses, server, nls_codepage);
288 if ((rc == -EACCES) && !tcon->retry) {
289 mutex_unlock(&ses->session_mutex);
293 mutex_unlock(&ses->session_mutex);
297 mutex_unlock(&ses->session_mutex);
300 mutex_unlock(&ses->session_mutex);
303 mutex_lock(&ses->session_mutex);
304 if (!tcon->need_reconnect) {
305 mutex_unlock(&ses->session_mutex);
308 cifs_mark_open_files_invalid(tcon);
309 if (tcon->use_persistent)
310 tcon->need_reopen_files = true;
312 rc = cifs_tree_connect(0, tcon, nls_codepage);
313 mutex_unlock(&ses->session_mutex);
315 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
317 /* If sess reconnected but tcon didn't, something strange ... */
318 pr_warn_once("reconnect tcon failed rc = %d\n", rc);
322 if (smb2_command != SMB2_INTERNAL_CMD)
323 mod_delayed_work(cifsiod_wq, &server->reconnect, 0);
325 atomic_inc(&tconInfoReconnectCount);
328 * Check if handle based operation so we know whether we can continue
329 * or not without returning to caller to reset file handle.
332 * BB Is flush done by server on drop of tcp session? Should we special
333 * case it and skip above?
335 switch (smb2_command) {
341 case SMB2_QUERY_DIRECTORY:
342 case SMB2_CHANGE_NOTIFY:
343 case SMB2_QUERY_INFO:
348 unload_nls(nls_codepage);
353 fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon,
354 struct TCP_Server_Info *server,
356 unsigned int *total_len)
358 struct smb2_pdu *spdu = buf;
359 /* lookup word count ie StructureSize from table */
360 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)];
363 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
364 * largest operations (Create)
368 smb2_hdr_assemble(&spdu->hdr, smb2_command, tcon, server);
369 spdu->StructureSize2 = cpu_to_le16(parmsize);
371 *total_len = parmsize + sizeof(struct smb2_hdr);
375 * Allocate and return pointer to an SMB request hdr, and set basic
376 * SMB information in the SMB header. If the return code is zero, this
377 * function must have filled in request_buf pointer.
379 static int __smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
380 struct TCP_Server_Info *server,
381 void **request_buf, unsigned int *total_len)
383 /* BB eventually switch this to SMB2 specific small buf size */
384 if (smb2_command == SMB2_SET_INFO)
385 *request_buf = cifs_buf_get();
387 *request_buf = cifs_small_buf_get();
388 if (*request_buf == NULL) {
389 /* BB should we add a retry in here if not a writepage? */
393 fill_small_buf(smb2_command, tcon, server,
394 (struct smb2_hdr *)(*request_buf),
398 uint16_t com_code = le16_to_cpu(smb2_command);
399 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
400 cifs_stats_inc(&tcon->num_smbs_sent);
406 static int smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
407 struct TCP_Server_Info *server,
408 void **request_buf, unsigned int *total_len)
412 rc = smb2_reconnect(smb2_command, tcon, server);
416 return __smb2_plain_req_init(smb2_command, tcon, server, request_buf,
420 static int smb2_ioctl_req_init(u32 opcode, struct cifs_tcon *tcon,
421 struct TCP_Server_Info *server,
422 void **request_buf, unsigned int *total_len)
424 /* Skip reconnect only for FSCTL_VALIDATE_NEGOTIATE_INFO IOCTLs */
425 if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) {
426 return __smb2_plain_req_init(SMB2_IOCTL, tcon, server,
427 request_buf, total_len);
429 return smb2_plain_req_init(SMB2_IOCTL, tcon, server,
430 request_buf, total_len);
433 /* For explanation of negotiate contexts see MS-SMB2 section 2.2.3.1 */
436 build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
438 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
439 pneg_ctxt->DataLength = cpu_to_le16(38);
440 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
441 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
442 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
443 pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
447 build_compression_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt)
449 pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES;
450 pneg_ctxt->DataLength =
451 cpu_to_le16(sizeof(struct smb2_compression_capabilities_context)
452 - sizeof(struct smb2_neg_context));
453 pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(3);
454 pneg_ctxt->CompressionAlgorithms[0] = SMB3_COMPRESS_LZ77;
455 pneg_ctxt->CompressionAlgorithms[1] = SMB3_COMPRESS_LZ77_HUFF;
456 pneg_ctxt->CompressionAlgorithms[2] = SMB3_COMPRESS_LZNT1;
460 build_signing_ctxt(struct smb2_signing_capabilities *pneg_ctxt)
462 unsigned int ctxt_len = sizeof(struct smb2_signing_capabilities);
463 unsigned short num_algs = 1; /* number of signing algorithms sent */
465 pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
467 * Context Data length must be rounded to multiple of 8 for some servers
469 pneg_ctxt->DataLength = cpu_to_le16(DIV_ROUND_UP(
470 sizeof(struct smb2_signing_capabilities) -
471 sizeof(struct smb2_neg_context) +
472 (num_algs * 2 /* sizeof u16 */), 8) * 8);
473 pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(num_algs);
474 pneg_ctxt->SigningAlgorithms[0] = cpu_to_le16(SIGNING_ALG_AES_CMAC);
476 ctxt_len += 2 /* sizeof le16 */ * num_algs;
477 ctxt_len = DIV_ROUND_UP(ctxt_len, 8) * 8;
479 /* TBD add SIGNING_ALG_AES_GMAC and/or SIGNING_ALG_HMAC_SHA256 */
483 build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
485 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
486 if (require_gcm_256) {
487 pneg_ctxt->DataLength = cpu_to_le16(4); /* Cipher Count + 1 cipher */
488 pneg_ctxt->CipherCount = cpu_to_le16(1);
489 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES256_GCM;
490 } else if (enable_gcm_256) {
491 pneg_ctxt->DataLength = cpu_to_le16(8); /* Cipher Count + 3 ciphers */
492 pneg_ctxt->CipherCount = cpu_to_le16(3);
493 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
494 pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES256_GCM;
495 pneg_ctxt->Ciphers[2] = SMB2_ENCRYPTION_AES128_CCM;
497 pneg_ctxt->DataLength = cpu_to_le16(6); /* Cipher Count + 2 ciphers */
498 pneg_ctxt->CipherCount = cpu_to_le16(2);
499 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
500 pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM;
505 build_netname_ctxt(struct smb2_netname_neg_context *pneg_ctxt, char *hostname)
507 struct nls_table *cp = load_nls_default();
509 pneg_ctxt->ContextType = SMB2_NETNAME_NEGOTIATE_CONTEXT_ID;
511 /* copy up to max of first 100 bytes of server name to NetName field */
512 pneg_ctxt->DataLength = cpu_to_le16(2 * cifs_strtoUTF16(pneg_ctxt->NetName, hostname, 100, cp));
513 /* context size is DataLength + minimal smb2_neg_context */
514 return DIV_ROUND_UP(le16_to_cpu(pneg_ctxt->DataLength) +
515 sizeof(struct smb2_neg_context), 8) * 8;
519 build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
521 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
522 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
523 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
524 pneg_ctxt->Name[0] = 0x93;
525 pneg_ctxt->Name[1] = 0xAD;
526 pneg_ctxt->Name[2] = 0x25;
527 pneg_ctxt->Name[3] = 0x50;
528 pneg_ctxt->Name[4] = 0x9C;
529 pneg_ctxt->Name[5] = 0xB4;
530 pneg_ctxt->Name[6] = 0x11;
531 pneg_ctxt->Name[7] = 0xE7;
532 pneg_ctxt->Name[8] = 0xB4;
533 pneg_ctxt->Name[9] = 0x23;
534 pneg_ctxt->Name[10] = 0x83;
535 pneg_ctxt->Name[11] = 0xDE;
536 pneg_ctxt->Name[12] = 0x96;
537 pneg_ctxt->Name[13] = 0x8B;
538 pneg_ctxt->Name[14] = 0xCD;
539 pneg_ctxt->Name[15] = 0x7C;
543 assemble_neg_contexts(struct smb2_negotiate_req *req,
544 struct TCP_Server_Info *server, unsigned int *total_len)
547 char *hostname = NULL;
548 unsigned int ctxt_len, neg_context_count;
550 if (*total_len > 200) {
551 /* In case length corrupted don't want to overrun smb buffer */
552 cifs_server_dbg(VFS, "Bad frame length assembling neg contexts\n");
557 * round up total_len of fixed part of SMB3 negotiate request to 8
558 * byte boundary before adding negotiate contexts
560 *total_len = roundup(*total_len, 8);
562 pneg_ctxt = (*total_len) + (char *)req;
563 req->NegotiateContextOffset = cpu_to_le32(*total_len);
565 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
566 ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_preauth_neg_context), 8) * 8;
567 *total_len += ctxt_len;
568 pneg_ctxt += ctxt_len;
570 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
571 ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_encryption_neg_context), 8) * 8;
572 *total_len += ctxt_len;
573 pneg_ctxt += ctxt_len;
576 * secondary channels don't have the hostname field populated
577 * use the hostname field in the primary channel instead
579 hostname = CIFS_SERVER_IS_CHAN(server) ?
580 server->primary_server->hostname : server->hostname;
581 if (hostname && (hostname[0] != 0)) {
582 ctxt_len = build_netname_ctxt((struct smb2_netname_neg_context *)pneg_ctxt,
584 *total_len += ctxt_len;
585 pneg_ctxt += ctxt_len;
586 neg_context_count = 3;
588 neg_context_count = 2;
590 build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
591 *total_len += sizeof(struct smb2_posix_neg_context);
592 pneg_ctxt += sizeof(struct smb2_posix_neg_context);
595 if (server->compress_algorithm) {
596 build_compression_ctxt((struct smb2_compression_capabilities_context *)
598 ctxt_len = DIV_ROUND_UP(
599 sizeof(struct smb2_compression_capabilities_context),
601 *total_len += ctxt_len;
602 pneg_ctxt += ctxt_len;
606 if (enable_negotiate_signing) {
607 ctxt_len = build_signing_ctxt((struct smb2_signing_capabilities *)
609 *total_len += ctxt_len;
610 pneg_ctxt += ctxt_len;
614 /* check for and add transport_capabilities and signing capabilities */
615 req->NegotiateContextCount = cpu_to_le16(neg_context_count);
619 static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt)
621 unsigned int len = le16_to_cpu(ctxt->DataLength);
623 /* If invalid preauth context warn but use what we requested, SHA-512 */
624 if (len < MIN_PREAUTH_CTXT_DATA_LEN) {
625 pr_warn_once("server sent bad preauth context\n");
627 } else if (len < MIN_PREAUTH_CTXT_DATA_LEN + le16_to_cpu(ctxt->SaltLength)) {
628 pr_warn_once("server sent invalid SaltLength\n");
631 if (le16_to_cpu(ctxt->HashAlgorithmCount) != 1)
632 pr_warn_once("Invalid SMB3 hash algorithm count\n");
633 if (ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
634 pr_warn_once("unknown SMB3 hash algorithm\n");
637 static void decode_compress_ctx(struct TCP_Server_Info *server,
638 struct smb2_compression_capabilities_context *ctxt)
640 unsigned int len = le16_to_cpu(ctxt->DataLength);
642 /* sizeof compress context is a one element compression capbility struct */
644 pr_warn_once("server sent bad compression cntxt\n");
647 if (le16_to_cpu(ctxt->CompressionAlgorithmCount) != 1) {
648 pr_warn_once("Invalid SMB3 compress algorithm count\n");
651 if (le16_to_cpu(ctxt->CompressionAlgorithms[0]) > 3) {
652 pr_warn_once("unknown compression algorithm\n");
655 server->compress_algorithm = ctxt->CompressionAlgorithms[0];
658 static int decode_encrypt_ctx(struct TCP_Server_Info *server,
659 struct smb2_encryption_neg_context *ctxt)
661 unsigned int len = le16_to_cpu(ctxt->DataLength);
663 cifs_dbg(FYI, "decode SMB3.11 encryption neg context of len %d\n", len);
664 if (len < MIN_ENCRYPT_CTXT_DATA_LEN) {
665 pr_warn_once("server sent bad crypto ctxt len\n");
669 if (le16_to_cpu(ctxt->CipherCount) != 1) {
670 pr_warn_once("Invalid SMB3.11 cipher count\n");
673 cifs_dbg(FYI, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt->Ciphers[0]));
674 if (require_gcm_256) {
675 if (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES256_GCM) {
676 cifs_dbg(VFS, "Server does not support requested encryption type (AES256 GCM)\n");
679 } else if (ctxt->Ciphers[0] == 0) {
681 * e.g. if server only supported AES256_CCM (very unlikely)
682 * or server supported no encryption types or had all disabled.
683 * Since GLOBAL_CAP_ENCRYPTION will be not set, in the case
684 * in which mount requested encryption ("seal") checks later
685 * on during tree connection will return proper rc, but if
686 * seal not requested by client, since server is allowed to
687 * return 0 to indicate no supported cipher, we can't fail here
689 server->cipher_type = 0;
690 server->capabilities &= ~SMB2_GLOBAL_CAP_ENCRYPTION;
691 pr_warn_once("Server does not support requested encryption types\n");
693 } else if ((ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_CCM) &&
694 (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_GCM) &&
695 (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES256_GCM)) {
696 /* server returned a cipher we didn't ask for */
697 pr_warn_once("Invalid SMB3.11 cipher returned\n");
700 server->cipher_type = ctxt->Ciphers[0];
701 server->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
705 static void decode_signing_ctx(struct TCP_Server_Info *server,
706 struct smb2_signing_capabilities *pctxt)
708 unsigned int len = le16_to_cpu(pctxt->DataLength);
710 if ((len < 4) || (len > 16)) {
711 pr_warn_once("server sent bad signing negcontext\n");
714 if (le16_to_cpu(pctxt->SigningAlgorithmCount) != 1) {
715 pr_warn_once("Invalid signing algorithm count\n");
718 if (le16_to_cpu(pctxt->SigningAlgorithms[0]) > 2) {
719 pr_warn_once("unknown signing algorithm\n");
723 server->signing_negotiated = true;
724 server->signing_algorithm = le16_to_cpu(pctxt->SigningAlgorithms[0]);
725 cifs_dbg(FYI, "signing algorithm %d chosen\n",
726 server->signing_algorithm);
730 static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp,
731 struct TCP_Server_Info *server,
732 unsigned int len_of_smb)
734 struct smb2_neg_context *pctx;
735 unsigned int offset = le32_to_cpu(rsp->NegotiateContextOffset);
736 unsigned int ctxt_cnt = le16_to_cpu(rsp->NegotiateContextCount);
737 unsigned int len_of_ctxts, i;
740 cifs_dbg(FYI, "decoding %d negotiate contexts\n", ctxt_cnt);
741 if (len_of_smb <= offset) {
742 cifs_server_dbg(VFS, "Invalid response: negotiate context offset\n");
746 len_of_ctxts = len_of_smb - offset;
748 for (i = 0; i < ctxt_cnt; i++) {
750 /* check that offset is not beyond end of SMB */
751 if (len_of_ctxts == 0)
754 if (len_of_ctxts < sizeof(struct smb2_neg_context))
757 pctx = (struct smb2_neg_context *)(offset + (char *)rsp);
758 clen = le16_to_cpu(pctx->DataLength);
759 if (clen > len_of_ctxts)
762 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES)
763 decode_preauth_context(
764 (struct smb2_preauth_neg_context *)pctx);
765 else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES)
766 rc = decode_encrypt_ctx(server,
767 (struct smb2_encryption_neg_context *)pctx);
768 else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES)
769 decode_compress_ctx(server,
770 (struct smb2_compression_capabilities_context *)pctx);
771 else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE)
772 server->posix_ext_supported = true;
773 else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES)
774 decode_signing_ctx(server,
775 (struct smb2_signing_capabilities *)pctx);
777 cifs_server_dbg(VFS, "unknown negcontext of type %d ignored\n",
778 le16_to_cpu(pctx->ContextType));
782 /* offsets must be 8 byte aligned */
783 clen = (clen + 7) & ~0x7;
784 offset += clen + sizeof(struct smb2_neg_context);
785 len_of_ctxts -= clen;
790 static struct create_posix *
791 create_posix_buf(umode_t mode)
793 struct create_posix *buf;
795 buf = kzalloc(sizeof(struct create_posix),
800 buf->ccontext.DataOffset =
801 cpu_to_le16(offsetof(struct create_posix, Mode));
802 buf->ccontext.DataLength = cpu_to_le32(4);
803 buf->ccontext.NameOffset =
804 cpu_to_le16(offsetof(struct create_posix, Name));
805 buf->ccontext.NameLength = cpu_to_le16(16);
807 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
818 buf->Name[10] = 0x83;
819 buf->Name[11] = 0xDE;
820 buf->Name[12] = 0x96;
821 buf->Name[13] = 0x8B;
822 buf->Name[14] = 0xCD;
823 buf->Name[15] = 0x7C;
824 buf->Mode = cpu_to_le32(mode);
825 cifs_dbg(FYI, "mode on posix create 0%o\n", mode);
830 add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode)
832 struct smb2_create_req *req = iov[0].iov_base;
833 unsigned int num = *num_iovec;
835 iov[num].iov_base = create_posix_buf(mode);
836 if (mode == ACL_NO_MODE)
837 cifs_dbg(FYI, "Invalid mode\n");
838 if (iov[num].iov_base == NULL)
840 iov[num].iov_len = sizeof(struct create_posix);
841 if (!req->CreateContextsOffset)
842 req->CreateContextsOffset = cpu_to_le32(
843 sizeof(struct smb2_create_req) +
844 iov[num - 1].iov_len);
845 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_posix));
846 *num_iovec = num + 1;
853 * SMB2 Worker functions follow:
855 * The general structure of the worker functions is:
856 * 1) Call smb2_init (assembles SMB2 header)
857 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
858 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
859 * 4) Decode SMB2 command specific fields in the fixed length area
860 * 5) Decode variable length data area (if any for this SMB2 command type)
861 * 6) Call free smb buffer
867 SMB2_negotiate(const unsigned int xid,
868 struct cifs_ses *ses,
869 struct TCP_Server_Info *server)
871 struct smb_rqst rqst;
872 struct smb2_negotiate_req *req;
873 struct smb2_negotiate_rsp *rsp;
878 int blob_offset, blob_length;
880 int flags = CIFS_NEG_OP;
881 unsigned int total_len;
883 cifs_dbg(FYI, "Negotiate protocol\n");
886 WARN(1, "%s: server is NULL!\n", __func__);
890 rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, server,
891 (void **) &req, &total_len);
895 req->hdr.SessionId = 0;
897 memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
898 memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
900 if (strcmp(server->vals->version_string,
901 SMB3ANY_VERSION_STRING) == 0) {
902 req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
903 req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
904 req->Dialects[2] = cpu_to_le16(SMB311_PROT_ID);
905 req->DialectCount = cpu_to_le16(3);
907 } else if (strcmp(server->vals->version_string,
908 SMBDEFAULT_VERSION_STRING) == 0) {
909 req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
910 req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
911 req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
912 req->Dialects[3] = cpu_to_le16(SMB311_PROT_ID);
913 req->DialectCount = cpu_to_le16(4);
916 /* otherwise send specific dialect */
917 req->Dialects[0] = cpu_to_le16(server->vals->protocol_id);
918 req->DialectCount = cpu_to_le16(1);
922 /* only one of SMB2 signing flags may be set in SMB2 request */
924 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
925 else if (global_secflags & CIFSSEC_MAY_SIGN)
926 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
928 req->SecurityMode = 0;
930 req->Capabilities = cpu_to_le32(server->vals->req_capabilities);
931 if (ses->chan_max > 1)
932 req->Capabilities |= cpu_to_le32(SMB2_GLOBAL_CAP_MULTI_CHANNEL);
934 /* ClientGUID must be zero for SMB2.02 dialect */
935 if (server->vals->protocol_id == SMB20_PROT_ID)
936 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
938 memcpy(req->ClientGUID, server->client_guid,
939 SMB2_CLIENT_GUID_SIZE);
940 if ((server->vals->protocol_id == SMB311_PROT_ID) ||
941 (strcmp(server->vals->version_string,
942 SMB3ANY_VERSION_STRING) == 0) ||
943 (strcmp(server->vals->version_string,
944 SMBDEFAULT_VERSION_STRING) == 0))
945 assemble_neg_contexts(req, server, &total_len);
947 iov[0].iov_base = (char *)req;
948 iov[0].iov_len = total_len;
950 memset(&rqst, 0, sizeof(struct smb_rqst));
954 rc = cifs_send_recv(xid, ses, server,
955 &rqst, &resp_buftype, flags, &rsp_iov);
956 cifs_small_buf_release(req);
957 rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base;
959 * No tcon so can't do
960 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
962 if (rc == -EOPNOTSUPP) {
963 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");
968 if (strcmp(server->vals->version_string,
969 SMB3ANY_VERSION_STRING) == 0) {
970 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
972 "SMB2 dialect returned but not requested\n");
974 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
976 "SMB2.1 dialect returned but not requested\n");
978 } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
979 /* ops set to 3.0 by default for default so update */
980 server->ops = &smb311_operations;
981 server->vals = &smb311_values;
983 } else if (strcmp(server->vals->version_string,
984 SMBDEFAULT_VERSION_STRING) == 0) {
985 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
987 "SMB2 dialect returned but not requested\n");
989 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
990 /* ops set to 3.0 by default for default so update */
991 server->ops = &smb21_operations;
992 server->vals = &smb21_values;
993 } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
994 server->ops = &smb311_operations;
995 server->vals = &smb311_values;
997 } else if (le16_to_cpu(rsp->DialectRevision) !=
998 server->vals->protocol_id) {
999 /* if requested single dialect ensure returned dialect matched */
1000 cifs_server_dbg(VFS, "Invalid 0x%x dialect returned: not requested\n",
1001 le16_to_cpu(rsp->DialectRevision));
1005 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
1007 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
1008 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
1009 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
1010 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
1011 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
1012 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
1013 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
1014 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
1015 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
1016 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
1018 cifs_server_dbg(VFS, "Invalid dialect returned by server 0x%x\n",
1019 le16_to_cpu(rsp->DialectRevision));
1023 server->dialect = le16_to_cpu(rsp->DialectRevision);
1026 * Keep a copy of the hash after negprot. This hash will be
1027 * the starting hash value for all sessions made from this
1030 memcpy(server->preauth_sha_hash, ses->preauth_sha_hash,
1031 SMB2_PREAUTH_HASH_SIZE);
1033 /* SMB2 only has an extended negflavor */
1034 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
1035 /* set it to the maximum buffer size value we can send with 1 credit */
1036 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
1037 SMB2_MAX_BUFFER_SIZE);
1038 server->max_read = le32_to_cpu(rsp->MaxReadSize);
1039 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
1040 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
1041 if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode)
1042 cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n",
1044 server->capabilities = le32_to_cpu(rsp->Capabilities);
1045 /* Internal types */
1046 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
1049 * SMB3.0 supports only 1 cipher and doesn't have a encryption neg context
1050 * Set the cipher type manually.
1052 if (server->dialect == SMB30_PROT_ID && (server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
1053 server->cipher_type = SMB2_ENCRYPTION_AES128_CCM;
1055 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
1056 (struct smb2_hdr *)rsp);
1058 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
1060 * ses->sectype = RawNTLMSSP;
1061 * but for time being this is our only auth choice so doesn't matter.
1062 * We just found a server which sets blob length to zero expecting raw.
1064 if (blob_length == 0) {
1065 cifs_dbg(FYI, "missing security blob on negprot\n");
1066 server->sec_ntlmssp = true;
1069 rc = cifs_enable_signing(server, ses->sign);
1073 rc = decode_negTokenInit(security_blob, blob_length, server);
1080 if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
1081 if (rsp->NegotiateContextCount)
1082 rc = smb311_decode_neg_context(rsp, server,
1085 cifs_server_dbg(VFS, "Missing expected negotiate contexts\n");
1088 free_rsp_buf(resp_buftype, rsp);
1092 int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
1095 struct validate_negotiate_info_req *pneg_inbuf;
1096 struct validate_negotiate_info_rsp *pneg_rsp = NULL;
1098 u32 inbuflen; /* max of 4 dialects */
1099 struct TCP_Server_Info *server = tcon->ses->server;
1101 cifs_dbg(FYI, "validate negotiate\n");
1103 /* In SMB3.11 preauth integrity supersedes validate negotiate */
1104 if (server->dialect == SMB311_PROT_ID)
1108 * validation ioctl must be signed, so no point sending this if we
1109 * can not sign it (ie are not known user). Even if signing is not
1110 * required (enabled but not negotiated), in those cases we selectively
1111 * sign just this, the first and only signed request on a connection.
1112 * Having validation of negotiate info helps reduce attack vectors.
1114 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
1115 return 0; /* validation requires signing */
1117 if (tcon->ses->user_name == NULL) {
1118 cifs_dbg(FYI, "Can't validate negotiate: null user mount\n");
1119 return 0; /* validation requires signing */
1122 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
1123 cifs_tcon_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n");
1125 pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS);
1129 pneg_inbuf->Capabilities =
1130 cpu_to_le32(server->vals->req_capabilities);
1131 if (tcon->ses->chan_max > 1)
1132 pneg_inbuf->Capabilities |= cpu_to_le32(SMB2_GLOBAL_CAP_MULTI_CHANNEL);
1134 memcpy(pneg_inbuf->Guid, server->client_guid,
1135 SMB2_CLIENT_GUID_SIZE);
1137 if (tcon->ses->sign)
1138 pneg_inbuf->SecurityMode =
1139 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
1140 else if (global_secflags & CIFSSEC_MAY_SIGN)
1141 pneg_inbuf->SecurityMode =
1142 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
1144 pneg_inbuf->SecurityMode = 0;
1147 if (strcmp(server->vals->version_string,
1148 SMB3ANY_VERSION_STRING) == 0) {
1149 pneg_inbuf->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
1150 pneg_inbuf->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
1151 pneg_inbuf->Dialects[2] = cpu_to_le16(SMB311_PROT_ID);
1152 pneg_inbuf->DialectCount = cpu_to_le16(3);
1153 /* SMB 2.1 not included so subtract one dialect from len */
1154 inbuflen = sizeof(*pneg_inbuf) -
1155 (sizeof(pneg_inbuf->Dialects[0]));
1156 } else if (strcmp(server->vals->version_string,
1157 SMBDEFAULT_VERSION_STRING) == 0) {
1158 pneg_inbuf->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
1159 pneg_inbuf->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
1160 pneg_inbuf->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
1161 pneg_inbuf->Dialects[3] = cpu_to_le16(SMB311_PROT_ID);
1162 pneg_inbuf->DialectCount = cpu_to_le16(4);
1163 /* structure is big enough for 4 dialects */
1164 inbuflen = sizeof(*pneg_inbuf);
1166 /* otherwise specific dialect was requested */
1167 pneg_inbuf->Dialects[0] =
1168 cpu_to_le16(server->vals->protocol_id);
1169 pneg_inbuf->DialectCount = cpu_to_le16(1);
1170 /* structure is big enough for 3 dialects, sending only 1 */
1171 inbuflen = sizeof(*pneg_inbuf) -
1172 sizeof(pneg_inbuf->Dialects[0]) * 2;
1175 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1176 FSCTL_VALIDATE_NEGOTIATE_INFO,
1177 (char *)pneg_inbuf, inbuflen, CIFSMaxBufSize,
1178 (char **)&pneg_rsp, &rsplen);
1179 if (rc == -EOPNOTSUPP) {
1181 * Old Windows versions or Netapp SMB server can return
1182 * not supported error. Client should accept it.
1184 cifs_tcon_dbg(VFS, "Server does not support validate negotiate\n");
1186 goto out_free_inbuf;
1187 } else if (rc != 0) {
1188 cifs_tcon_dbg(VFS, "validate protocol negotiate failed: %d\n",
1191 goto out_free_inbuf;
1195 if (rsplen != sizeof(*pneg_rsp)) {
1196 cifs_tcon_dbg(VFS, "Invalid protocol negotiate response size: %d\n",
1199 /* relax check since Mac returns max bufsize allowed on ioctl */
1200 if (rsplen > CIFSMaxBufSize || rsplen < sizeof(*pneg_rsp))
1204 /* check validate negotiate info response matches what we got earlier */
1205 if (pneg_rsp->Dialect != cpu_to_le16(server->dialect))
1208 if (pneg_rsp->SecurityMode != cpu_to_le16(server->sec_mode))
1211 /* do not validate server guid because not saved at negprot time yet */
1213 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
1214 SMB2_LARGE_FILES) != server->capabilities)
1217 /* validate negotiate successful */
1219 cifs_dbg(FYI, "validate negotiate info successful\n");
1223 cifs_tcon_dbg(VFS, "protocol revalidation - security settings mismatch\n");
1232 smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
1234 switch (requested) {
1241 if (server->sec_ntlmssp &&
1242 (global_secflags & CIFSSEC_MAY_NTLMSSP))
1244 if ((server->sec_kerberos || server->sec_mskerberos) &&
1245 (global_secflags & CIFSSEC_MAY_KRB5))
1253 struct SMB2_sess_data {
1255 struct cifs_ses *ses;
1256 struct TCP_Server_Info *server;
1257 struct nls_table *nls_cp;
1258 void (*func)(struct SMB2_sess_data *);
1260 u64 previous_session;
1262 /* we will send the SMB in three pieces:
1263 * a fixed length beginning part, an optional
1264 * SPNEGO blob (which can be zero length), and a
1265 * last part which will include the strings
1266 * and rest of bcc area. This allows us to avoid
1267 * a large buffer 17K allocation
1274 SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
1277 struct cifs_ses *ses = sess_data->ses;
1278 struct TCP_Server_Info *server = sess_data->server;
1279 struct smb2_sess_setup_req *req;
1280 unsigned int total_len;
1281 bool is_binding = false;
1283 rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, server,
1289 spin_lock(&ses->chan_lock);
1290 is_binding = !CIFS_ALL_CHANS_NEED_RECONNECT(ses);
1291 spin_unlock(&ses->chan_lock);
1294 req->hdr.SessionId = cpu_to_le64(ses->Suid);
1295 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
1296 req->PreviousSessionId = 0;
1297 req->Flags = SMB2_SESSION_REQ_FLAG_BINDING;
1298 cifs_dbg(FYI, "Binding to sess id: %llx\n", ses->Suid);
1300 /* First session, not a reauthenticate */
1301 req->hdr.SessionId = 0;
1303 * if reconnect, we need to send previous sess id
1306 req->PreviousSessionId = cpu_to_le64(sess_data->previous_session);
1307 req->Flags = 0; /* MBZ */
1308 cifs_dbg(FYI, "Fresh session. Previous: %llx\n",
1309 sess_data->previous_session);
1312 /* enough to enable echos and oplocks and one max size write */
1313 req->hdr.CreditRequest = cpu_to_le16(130);
1315 /* only one of SMB2 signing flags may be set in SMB2 request */
1317 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
1318 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
1319 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
1321 req->SecurityMode = 0;
1323 #ifdef CONFIG_CIFS_DFS_UPCALL
1324 req->Capabilities = cpu_to_le32(SMB2_GLOBAL_CAP_DFS);
1326 req->Capabilities = 0;
1327 #endif /* DFS_UPCALL */
1329 req->Channel = 0; /* MBZ */
1331 sess_data->iov[0].iov_base = (char *)req;
1333 sess_data->iov[0].iov_len = total_len - 1;
1335 * This variable will be used to clear the buffer
1336 * allocated above in case of any error in the calling function.
1338 sess_data->buf0_type = CIFS_SMALL_BUFFER;
1344 SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
1346 free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
1347 sess_data->buf0_type = CIFS_NO_BUFFER;
1351 SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
1354 struct smb_rqst rqst;
1355 struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
1356 struct kvec rsp_iov = { NULL, 0 };
1358 /* Testing shows that buffer offset must be at location of Buffer[0] */
1359 req->SecurityBufferOffset =
1360 cpu_to_le16(sizeof(struct smb2_sess_setup_req) - 1 /* pad */);
1361 req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
1363 memset(&rqst, 0, sizeof(struct smb_rqst));
1364 rqst.rq_iov = sess_data->iov;
1367 /* BB add code to build os and lm fields */
1368 rc = cifs_send_recv(sess_data->xid, sess_data->ses,
1371 &sess_data->buf0_type,
1372 CIFS_LOG_ERROR | CIFS_SESS_OP, &rsp_iov);
1373 cifs_small_buf_release(sess_data->iov[0].iov_base);
1374 memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
1380 SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
1383 struct cifs_ses *ses = sess_data->ses;
1384 struct TCP_Server_Info *server = sess_data->server;
1386 cifs_server_lock(server);
1387 if (server->ops->generate_signingkey) {
1388 rc = server->ops->generate_signingkey(ses, server);
1391 "SMB3 session key generation failed\n");
1392 cifs_server_unlock(server);
1396 if (!server->session_estab) {
1397 server->sequence_number = 0x2;
1398 server->session_estab = true;
1400 cifs_server_unlock(server);
1402 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
1406 #ifdef CONFIG_CIFS_UPCALL
1408 SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1411 struct cifs_ses *ses = sess_data->ses;
1412 struct TCP_Server_Info *server = sess_data->server;
1413 struct cifs_spnego_msg *msg;
1414 struct key *spnego_key = NULL;
1415 struct smb2_sess_setup_rsp *rsp = NULL;
1416 bool is_binding = false;
1418 rc = SMB2_sess_alloc_buffer(sess_data);
1422 spnego_key = cifs_get_spnego_key(ses, server);
1423 if (IS_ERR(spnego_key)) {
1424 rc = PTR_ERR(spnego_key);
1426 cifs_dbg(VFS, "Verify user has a krb5 ticket and keyutils is installed\n");
1431 msg = spnego_key->payload.data[0];
1433 * check version field to make sure that cifs.upcall is
1434 * sending us a response in an expected form
1436 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
1437 cifs_dbg(VFS, "bad cifs.upcall version. Expected %d got %d\n",
1438 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
1440 goto out_put_spnego_key;
1443 spin_lock(&ses->chan_lock);
1444 is_binding = !CIFS_ALL_CHANS_NEED_RECONNECT(ses);
1445 spin_unlock(&ses->chan_lock);
1447 /* keep session key if binding */
1449 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
1451 if (!ses->auth_key.response) {
1452 cifs_dbg(VFS, "Kerberos can't allocate (%u bytes) memory\n",
1455 goto out_put_spnego_key;
1457 ses->auth_key.len = msg->sesskey_len;
1460 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
1461 sess_data->iov[1].iov_len = msg->secblob_len;
1463 rc = SMB2_sess_sendreceive(sess_data);
1465 goto out_put_spnego_key;
1467 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1468 /* keep session id and flags if binding */
1470 ses->Suid = le64_to_cpu(rsp->hdr.SessionId);
1471 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
1474 rc = SMB2_sess_establish_session(sess_data);
1476 key_invalidate(spnego_key);
1477 key_put(spnego_key);
1479 sess_data->result = rc;
1480 sess_data->func = NULL;
1481 SMB2_sess_free_buffer(sess_data);
1485 SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1487 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
1488 sess_data->result = -EOPNOTSUPP;
1489 sess_data->func = NULL;
1494 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
1497 SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
1500 struct cifs_ses *ses = sess_data->ses;
1501 struct TCP_Server_Info *server = sess_data->server;
1502 struct smb2_sess_setup_rsp *rsp = NULL;
1503 unsigned char *ntlmssp_blob = NULL;
1504 bool use_spnego = false; /* else use raw ntlmssp */
1505 u16 blob_length = 0;
1506 bool is_binding = false;
1509 * If memory allocation is successful, caller of this function
1512 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
1513 if (!ses->ntlmssp) {
1517 ses->ntlmssp->sesskey_per_smbsess = true;
1519 rc = SMB2_sess_alloc_buffer(sess_data);
1523 rc = build_ntlmssp_smb3_negotiate_blob(&ntlmssp_blob,
1524 &blob_length, ses, server,
1530 /* BB eventually need to add this */
1531 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1535 sess_data->iov[1].iov_base = ntlmssp_blob;
1536 sess_data->iov[1].iov_len = blob_length;
1538 rc = SMB2_sess_sendreceive(sess_data);
1539 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1541 /* If true, rc here is expected and not an error */
1542 if (sess_data->buf0_type != CIFS_NO_BUFFER &&
1543 rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
1549 if (offsetof(struct smb2_sess_setup_rsp, Buffer) !=
1550 le16_to_cpu(rsp->SecurityBufferOffset)) {
1551 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
1552 le16_to_cpu(rsp->SecurityBufferOffset));
1556 rc = decode_ntlmssp_challenge(rsp->Buffer,
1557 le16_to_cpu(rsp->SecurityBufferLength), ses);
1561 cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
1563 spin_lock(&ses->chan_lock);
1564 is_binding = !CIFS_ALL_CHANS_NEED_RECONNECT(ses);
1565 spin_unlock(&ses->chan_lock);
1567 /* keep existing ses id and flags if binding */
1569 ses->Suid = le64_to_cpu(rsp->hdr.SessionId);
1570 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
1574 kfree(ntlmssp_blob);
1575 SMB2_sess_free_buffer(sess_data);
1577 sess_data->result = 0;
1578 sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
1582 kfree(ses->ntlmssp);
1583 ses->ntlmssp = NULL;
1584 sess_data->result = rc;
1585 sess_data->func = NULL;
1589 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
1592 struct cifs_ses *ses = sess_data->ses;
1593 struct TCP_Server_Info *server = sess_data->server;
1594 struct smb2_sess_setup_req *req;
1595 struct smb2_sess_setup_rsp *rsp = NULL;
1596 unsigned char *ntlmssp_blob = NULL;
1597 bool use_spnego = false; /* else use raw ntlmssp */
1598 u16 blob_length = 0;
1599 bool is_binding = false;
1601 rc = SMB2_sess_alloc_buffer(sess_data);
1605 req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
1606 req->hdr.SessionId = cpu_to_le64(ses->Suid);
1608 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length,
1612 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
1617 /* BB eventually need to add this */
1618 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1622 sess_data->iov[1].iov_base = ntlmssp_blob;
1623 sess_data->iov[1].iov_len = blob_length;
1625 rc = SMB2_sess_sendreceive(sess_data);
1629 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1631 spin_lock(&ses->chan_lock);
1632 is_binding = !CIFS_ALL_CHANS_NEED_RECONNECT(ses);
1633 spin_unlock(&ses->chan_lock);
1635 /* keep existing ses id and flags if binding */
1637 ses->Suid = le64_to_cpu(rsp->hdr.SessionId);
1638 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
1641 rc = SMB2_sess_establish_session(sess_data);
1642 #ifdef CONFIG_CIFS_DEBUG_DUMP_KEYS
1643 if (ses->server->dialect < SMB30_PROT_ID) {
1644 cifs_dbg(VFS, "%s: dumping generated SMB2 session keys\n", __func__);
1646 * The session id is opaque in terms of endianness, so we can't
1647 * print it as a long long. we dump it as we got it on the wire
1649 cifs_dbg(VFS, "Session Id %*ph\n", (int)sizeof(ses->Suid),
1651 cifs_dbg(VFS, "Session Key %*ph\n",
1652 SMB2_NTLMV2_SESSKEY_SIZE, ses->auth_key.response);
1653 cifs_dbg(VFS, "Signing Key %*ph\n",
1654 SMB3_SIGN_KEY_SIZE, ses->auth_key.response);
1658 kfree(ntlmssp_blob);
1659 SMB2_sess_free_buffer(sess_data);
1660 kfree(ses->ntlmssp);
1661 ses->ntlmssp = NULL;
1662 sess_data->result = rc;
1663 sess_data->func = NULL;
1667 SMB2_select_sec(struct SMB2_sess_data *sess_data)
1670 struct cifs_ses *ses = sess_data->ses;
1671 struct TCP_Server_Info *server = sess_data->server;
1673 type = smb2_select_sectype(server, ses->sectype);
1674 cifs_dbg(FYI, "sess setup type %d\n", type);
1675 if (type == Unspecified) {
1676 cifs_dbg(VFS, "Unable to select appropriate authentication method!\n");
1682 sess_data->func = SMB2_auth_kerberos;
1685 sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
1688 cifs_dbg(VFS, "secType %d not supported!\n", type);
1696 SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
1697 struct TCP_Server_Info *server,
1698 const struct nls_table *nls_cp)
1701 struct SMB2_sess_data *sess_data;
1703 cifs_dbg(FYI, "Session Setup\n");
1706 WARN(1, "%s: server is NULL!\n", __func__);
1710 sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
1714 sess_data->xid = xid;
1715 sess_data->ses = ses;
1716 sess_data->server = server;
1717 sess_data->buf0_type = CIFS_NO_BUFFER;
1718 sess_data->nls_cp = (struct nls_table *) nls_cp;
1719 sess_data->previous_session = ses->Suid;
1721 rc = SMB2_select_sec(sess_data);
1726 * Initialize the session hash with the server one.
1728 memcpy(ses->preauth_sha_hash, server->preauth_sha_hash,
1729 SMB2_PREAUTH_HASH_SIZE);
1731 while (sess_data->func)
1732 sess_data->func(sess_data);
1734 if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign))
1735 cifs_server_dbg(VFS, "signing requested but authenticated as guest\n");
1736 rc = sess_data->result;
1743 SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
1745 struct smb_rqst rqst;
1746 struct smb2_logoff_req *req; /* response is also trivial struct */
1748 struct TCP_Server_Info *server;
1750 unsigned int total_len;
1752 struct kvec rsp_iov;
1755 cifs_dbg(FYI, "disconnect session %p\n", ses);
1757 if (ses && (ses->server))
1758 server = ses->server;
1762 /* no need to send SMB logoff if uid already closed due to reconnect */
1763 spin_lock(&ses->chan_lock);
1764 if (CIFS_ALL_CHANS_NEED_RECONNECT(ses)) {
1765 spin_unlock(&ses->chan_lock);
1766 goto smb2_session_already_dead;
1768 spin_unlock(&ses->chan_lock);
1770 rc = smb2_plain_req_init(SMB2_LOGOFF, NULL, ses->server,
1771 (void **) &req, &total_len);
1775 /* since no tcon, smb2_init can not do this, so do here */
1776 req->hdr.SessionId = cpu_to_le64(ses->Suid);
1778 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
1779 flags |= CIFS_TRANSFORM_REQ;
1780 else if (server->sign)
1781 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
1783 flags |= CIFS_NO_RSP_BUF;
1785 iov[0].iov_base = (char *)req;
1786 iov[0].iov_len = total_len;
1788 memset(&rqst, 0, sizeof(struct smb_rqst));
1792 rc = cifs_send_recv(xid, ses, ses->server,
1793 &rqst, &resp_buf_type, flags, &rsp_iov);
1794 cifs_small_buf_release(req);
1796 * No tcon so can't do
1797 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1800 smb2_session_already_dead:
1804 static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
1806 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
1809 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1811 /* These are similar values to what Windows uses */
1812 static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
1814 tcon->max_chunks = 256;
1815 tcon->max_bytes_chunk = 1048576;
1816 tcon->max_bytes_copy = 16777216;
1820 SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
1821 struct cifs_tcon *tcon, const struct nls_table *cp)
1823 struct smb_rqst rqst;
1824 struct smb2_tree_connect_req *req;
1825 struct smb2_tree_connect_rsp *rsp = NULL;
1827 struct kvec rsp_iov = { NULL, 0 };
1831 __le16 *unc_path = NULL;
1833 unsigned int total_len;
1834 struct TCP_Server_Info *server;
1836 /* always use master channel */
1837 server = ses->server;
1839 cifs_dbg(FYI, "TCON\n");
1841 if (!server || !tree)
1844 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
1845 if (unc_path == NULL)
1848 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
1850 if (unc_path_len < 2) {
1855 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
1857 atomic_set(&tcon->num_remote_opens, 0);
1858 rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, server,
1859 (void **) &req, &total_len);
1865 if (smb3_encryption_required(tcon))
1866 flags |= CIFS_TRANSFORM_REQ;
1868 iov[0].iov_base = (char *)req;
1870 iov[0].iov_len = total_len - 1;
1872 /* Testing shows that buffer offset must be at location of Buffer[0] */
1873 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
1875 req->PathLength = cpu_to_le16(unc_path_len - 2);
1876 iov[1].iov_base = unc_path;
1877 iov[1].iov_len = unc_path_len;
1880 * 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1
1881 * unless it is guest or anonymous user. See MS-SMB2 3.2.5.3.1
1882 * (Samba servers don't always set the flag so also check if null user)
1884 if ((server->dialect == SMB311_PROT_ID) &&
1885 !smb3_encryption_required(tcon) &&
1886 !(ses->session_flags &
1887 (SMB2_SESSION_FLAG_IS_GUEST|SMB2_SESSION_FLAG_IS_NULL)) &&
1888 ((ses->user_name != NULL) || (ses->sectype == Kerberos)))
1889 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
1891 memset(&rqst, 0, sizeof(struct smb_rqst));
1895 /* Need 64 for max size write so ask for more in case not there yet */
1896 req->hdr.CreditRequest = cpu_to_le16(64);
1898 rc = cifs_send_recv(xid, ses, server,
1899 &rqst, &resp_buftype, flags, &rsp_iov);
1900 cifs_small_buf_release(req);
1901 rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
1902 trace_smb3_tcon(xid, tcon->tid, ses->Suid, tree, rc);
1903 if ((rc != 0) || (rsp == NULL)) {
1904 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
1905 tcon->need_reconnect = true;
1906 goto tcon_error_exit;
1909 switch (rsp->ShareType) {
1910 case SMB2_SHARE_TYPE_DISK:
1911 cifs_dbg(FYI, "connection to disk share\n");
1913 case SMB2_SHARE_TYPE_PIPE:
1915 cifs_dbg(FYI, "connection to pipe share\n");
1917 case SMB2_SHARE_TYPE_PRINT:
1919 cifs_dbg(FYI, "connection to printer\n");
1922 cifs_server_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
1924 goto tcon_error_exit;
1927 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
1928 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
1929 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1930 tcon->tid = le32_to_cpu(rsp->hdr.Id.SyncId.TreeId);
1931 strscpy(tcon->treeName, tree, sizeof(tcon->treeName));
1933 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1934 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
1935 cifs_tcon_dbg(VFS, "DFS capability contradicts DFS flag\n");
1938 !(server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
1939 cifs_tcon_dbg(VFS, "Encryption is requested but not supported\n");
1941 init_copy_chunk_defaults(tcon);
1942 if (server->ops->validate_negotiate)
1943 rc = server->ops->validate_negotiate(xid, tcon);
1946 free_rsp_buf(resp_buftype, rsp);
1951 if (rsp && rsp->hdr.Status == STATUS_BAD_NETWORK_NAME)
1952 cifs_tcon_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
1957 SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1959 struct smb_rqst rqst;
1960 struct smb2_tree_disconnect_req *req; /* response is trivial */
1962 struct cifs_ses *ses = tcon->ses;
1964 unsigned int total_len;
1966 struct kvec rsp_iov;
1969 cifs_dbg(FYI, "Tree Disconnect\n");
1971 if (!ses || !(ses->server))
1974 spin_lock(&ses->chan_lock);
1975 if ((tcon->need_reconnect) ||
1976 (CIFS_ALL_CHANS_NEED_RECONNECT(tcon->ses))) {
1977 spin_unlock(&ses->chan_lock);
1980 spin_unlock(&ses->chan_lock);
1982 invalidate_all_cached_dirs(tcon);
1984 rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, ses->server,
1990 if (smb3_encryption_required(tcon))
1991 flags |= CIFS_TRANSFORM_REQ;
1993 flags |= CIFS_NO_RSP_BUF;
1995 iov[0].iov_base = (char *)req;
1996 iov[0].iov_len = total_len;
1998 memset(&rqst, 0, sizeof(struct smb_rqst));
2002 rc = cifs_send_recv(xid, ses, ses->server,
2003 &rqst, &resp_buf_type, flags, &rsp_iov);
2004 cifs_small_buf_release(req);
2006 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
2012 static struct create_durable *
2013 create_durable_buf(void)
2015 struct create_durable *buf;
2017 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
2021 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2022 (struct create_durable, Data));
2023 buf->ccontext.DataLength = cpu_to_le32(16);
2024 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2025 (struct create_durable, Name));
2026 buf->ccontext.NameLength = cpu_to_le16(4);
2027 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
2035 static struct create_durable *
2036 create_reconnect_durable_buf(struct cifs_fid *fid)
2038 struct create_durable *buf;
2040 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
2044 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2045 (struct create_durable, Data));
2046 buf->ccontext.DataLength = cpu_to_le32(16);
2047 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2048 (struct create_durable, Name));
2049 buf->ccontext.NameLength = cpu_to_le16(4);
2050 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
2051 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
2052 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
2061 parse_query_id_ctxt(struct create_context *cc, struct smb2_file_all_info *buf)
2063 struct create_on_disk_id *pdisk_id = (struct create_on_disk_id *)cc;
2065 cifs_dbg(FYI, "parse query id context 0x%llx 0x%llx\n",
2066 pdisk_id->DiskFileId, pdisk_id->VolumeId);
2067 buf->IndexNumber = pdisk_id->DiskFileId;
2071 parse_posix_ctxt(struct create_context *cc, struct smb2_file_all_info *info,
2072 struct create_posix_rsp *posix)
2075 u8 *beg = (u8 *)cc + le16_to_cpu(cc->DataOffset);
2076 u8 *end = beg + le32_to_cpu(cc->DataLength);
2079 memset(posix, 0, sizeof(*posix));
2081 posix->nlink = le32_to_cpu(*(__le32 *)(beg + 0));
2082 posix->reparse_tag = le32_to_cpu(*(__le32 *)(beg + 4));
2083 posix->mode = le32_to_cpu(*(__le32 *)(beg + 8));
2086 sid_len = posix_info_sid_size(sid, end);
2088 cifs_dbg(VFS, "bad owner sid in posix create response\n");
2091 memcpy(&posix->owner, sid, sid_len);
2093 sid = sid + sid_len;
2094 sid_len = posix_info_sid_size(sid, end);
2096 cifs_dbg(VFS, "bad group sid in posix create response\n");
2099 memcpy(&posix->group, sid, sid_len);
2101 cifs_dbg(FYI, "nlink=%d mode=%o reparse_tag=%x\n",
2102 posix->nlink, posix->mode, posix->reparse_tag);
2106 smb2_parse_contexts(struct TCP_Server_Info *server,
2107 struct smb2_create_rsp *rsp,
2108 unsigned int *epoch, char *lease_key, __u8 *oplock,
2109 struct smb2_file_all_info *buf,
2110 struct create_posix_rsp *posix)
2113 struct create_context *cc;
2115 unsigned int remaining;
2117 static const char smb3_create_tag_posix[] = {
2118 0x93, 0xAD, 0x25, 0x50, 0x9C,
2119 0xB4, 0x11, 0xE7, 0xB4, 0x23, 0x83,
2120 0xDE, 0x96, 0x8B, 0xCD, 0x7C
2124 data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset);
2125 remaining = le32_to_cpu(rsp->CreateContextsLength);
2126 cc = (struct create_context *)data_offset;
2128 /* Initialize inode number to 0 in case no valid data in qfid context */
2130 buf->IndexNumber = 0;
2132 while (remaining >= sizeof(struct create_context)) {
2133 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
2134 if (le16_to_cpu(cc->NameLength) == 4 &&
2135 strncmp(name, SMB2_CREATE_REQUEST_LEASE, 4) == 0)
2136 *oplock = server->ops->parse_lease_buf(cc, epoch,
2138 else if (buf && (le16_to_cpu(cc->NameLength) == 4) &&
2139 strncmp(name, SMB2_CREATE_QUERY_ON_DISK_ID, 4) == 0)
2140 parse_query_id_ctxt(cc, buf);
2141 else if ((le16_to_cpu(cc->NameLength) == 16)) {
2143 memcmp(name, smb3_create_tag_posix, 16) == 0)
2144 parse_posix_ctxt(cc, buf, posix);
2147 cifs_dbg(FYI, "Context not matched with len %d\n",
2148 le16_to_cpu(cc->NameLength));
2149 cifs_dump_mem("Cctxt name: ", name, 4);
2152 next = le32_to_cpu(cc->Next);
2156 cc = (struct create_context *)((char *)cc + next);
2159 if (rsp->OplockLevel != SMB2_OPLOCK_LEVEL_LEASE)
2160 *oplock = rsp->OplockLevel;
2166 add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
2167 unsigned int *num_iovec, u8 *lease_key, __u8 *oplock)
2169 struct smb2_create_req *req = iov[0].iov_base;
2170 unsigned int num = *num_iovec;
2172 iov[num].iov_base = server->ops->create_lease_buf(lease_key, *oplock);
2173 if (iov[num].iov_base == NULL)
2175 iov[num].iov_len = server->vals->create_lease_size;
2176 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
2177 if (!req->CreateContextsOffset)
2178 req->CreateContextsOffset = cpu_to_le32(
2179 sizeof(struct smb2_create_req) +
2180 iov[num - 1].iov_len);
2181 le32_add_cpu(&req->CreateContextsLength,
2182 server->vals->create_lease_size);
2183 *num_iovec = num + 1;
2187 static struct create_durable_v2 *
2188 create_durable_v2_buf(struct cifs_open_parms *oparms)
2190 struct cifs_fid *pfid = oparms->fid;
2191 struct create_durable_v2 *buf;
2193 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
2197 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2198 (struct create_durable_v2, dcontext));
2199 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
2200 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2201 (struct create_durable_v2, Name));
2202 buf->ccontext.NameLength = cpu_to_le16(4);
2205 * NB: Handle timeout defaults to 0, which allows server to choose
2206 * (most servers default to 120 seconds) and most clients default to 0.
2207 * This can be overridden at mount ("handletimeout=") if the user wants
2208 * a different persistent (or resilient) handle timeout for all opens
2209 * opens on a particular SMB3 mount.
2211 buf->dcontext.Timeout = cpu_to_le32(oparms->tcon->handle_timeout);
2212 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
2213 generate_random_uuid(buf->dcontext.CreateGuid);
2214 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
2216 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
2224 static struct create_durable_handle_reconnect_v2 *
2225 create_reconnect_durable_v2_buf(struct cifs_fid *fid)
2227 struct create_durable_handle_reconnect_v2 *buf;
2229 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
2234 buf->ccontext.DataOffset =
2235 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
2237 buf->ccontext.DataLength =
2238 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
2239 buf->ccontext.NameOffset =
2240 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
2242 buf->ccontext.NameLength = cpu_to_le16(4);
2244 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
2245 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
2246 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
2247 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
2249 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
2258 add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
2259 struct cifs_open_parms *oparms)
2261 struct smb2_create_req *req = iov[0].iov_base;
2262 unsigned int num = *num_iovec;
2264 iov[num].iov_base = create_durable_v2_buf(oparms);
2265 if (iov[num].iov_base == NULL)
2267 iov[num].iov_len = sizeof(struct create_durable_v2);
2268 if (!req->CreateContextsOffset)
2269 req->CreateContextsOffset =
2270 cpu_to_le32(sizeof(struct smb2_create_req) +
2272 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
2273 *num_iovec = num + 1;
2278 add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
2279 struct cifs_open_parms *oparms)
2281 struct smb2_create_req *req = iov[0].iov_base;
2282 unsigned int num = *num_iovec;
2284 /* indicate that we don't need to relock the file */
2285 oparms->reconnect = false;
2287 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
2288 if (iov[num].iov_base == NULL)
2290 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
2291 if (!req->CreateContextsOffset)
2292 req->CreateContextsOffset =
2293 cpu_to_le32(sizeof(struct smb2_create_req) +
2295 le32_add_cpu(&req->CreateContextsLength,
2296 sizeof(struct create_durable_handle_reconnect_v2));
2297 *num_iovec = num + 1;
2302 add_durable_context(struct kvec *iov, unsigned int *num_iovec,
2303 struct cifs_open_parms *oparms, bool use_persistent)
2305 struct smb2_create_req *req = iov[0].iov_base;
2306 unsigned int num = *num_iovec;
2308 if (use_persistent) {
2309 if (oparms->reconnect)
2310 return add_durable_reconnect_v2_context(iov, num_iovec,
2313 return add_durable_v2_context(iov, num_iovec, oparms);
2316 if (oparms->reconnect) {
2317 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
2318 /* indicate that we don't need to relock the file */
2319 oparms->reconnect = false;
2321 iov[num].iov_base = create_durable_buf();
2322 if (iov[num].iov_base == NULL)
2324 iov[num].iov_len = sizeof(struct create_durable);
2325 if (!req->CreateContextsOffset)
2326 req->CreateContextsOffset =
2327 cpu_to_le32(sizeof(struct smb2_create_req) +
2329 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
2330 *num_iovec = num + 1;
2334 /* See MS-SMB2 2.2.13.2.7 */
2335 static struct crt_twarp_ctxt *
2336 create_twarp_buf(__u64 timewarp)
2338 struct crt_twarp_ctxt *buf;
2340 buf = kzalloc(sizeof(struct crt_twarp_ctxt), GFP_KERNEL);
2344 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2345 (struct crt_twarp_ctxt, Timestamp));
2346 buf->ccontext.DataLength = cpu_to_le32(8);
2347 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2348 (struct crt_twarp_ctxt, Name));
2349 buf->ccontext.NameLength = cpu_to_le16(4);
2350 /* SMB2_CREATE_TIMEWARP_TOKEN is "TWrp" */
2355 buf->Timestamp = cpu_to_le64(timewarp);
2359 /* See MS-SMB2 2.2.13.2.7 */
2361 add_twarp_context(struct kvec *iov, unsigned int *num_iovec, __u64 timewarp)
2363 struct smb2_create_req *req = iov[0].iov_base;
2364 unsigned int num = *num_iovec;
2366 iov[num].iov_base = create_twarp_buf(timewarp);
2367 if (iov[num].iov_base == NULL)
2369 iov[num].iov_len = sizeof(struct crt_twarp_ctxt);
2370 if (!req->CreateContextsOffset)
2371 req->CreateContextsOffset = cpu_to_le32(
2372 sizeof(struct smb2_create_req) +
2373 iov[num - 1].iov_len);
2374 le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_twarp_ctxt));
2375 *num_iovec = num + 1;
2379 /* See See http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx */
2380 static void setup_owner_group_sids(char *buf)
2382 struct owner_group_sids *sids = (struct owner_group_sids *)buf;
2384 /* Populate the user ownership fields S-1-5-88-1 */
2385 sids->owner.Revision = 1;
2386 sids->owner.NumAuth = 3;
2387 sids->owner.Authority[5] = 5;
2388 sids->owner.SubAuthorities[0] = cpu_to_le32(88);
2389 sids->owner.SubAuthorities[1] = cpu_to_le32(1);
2390 sids->owner.SubAuthorities[2] = cpu_to_le32(current_fsuid().val);
2392 /* Populate the group ownership fields S-1-5-88-2 */
2393 sids->group.Revision = 1;
2394 sids->group.NumAuth = 3;
2395 sids->group.Authority[5] = 5;
2396 sids->group.SubAuthorities[0] = cpu_to_le32(88);
2397 sids->group.SubAuthorities[1] = cpu_to_le32(2);
2398 sids->group.SubAuthorities[2] = cpu_to_le32(current_fsgid().val);
2400 cifs_dbg(FYI, "owner S-1-5-88-1-%d, group S-1-5-88-2-%d\n", current_fsuid().val, current_fsgid().val);
2403 /* See MS-SMB2 2.2.13.2.2 and MS-DTYP 2.4.6 */
2404 static struct crt_sd_ctxt *
2405 create_sd_buf(umode_t mode, bool set_owner, unsigned int *len)
2407 struct crt_sd_ctxt *buf;
2409 unsigned int acelen, acl_size, ace_count;
2410 unsigned int owner_offset = 0;
2411 unsigned int group_offset = 0;
2412 struct smb3_acl acl;
2414 *len = roundup(sizeof(struct crt_sd_ctxt) + (sizeof(struct cifs_ace) * 4), 8);
2417 /* sizeof(struct owner_group_sids) is already multiple of 8 so no need to round */
2418 *len += sizeof(struct owner_group_sids);
2421 buf = kzalloc(*len, GFP_KERNEL);
2425 ptr = (__u8 *)&buf[1];
2427 /* offset fields are from beginning of security descriptor not of create context */
2428 owner_offset = ptr - (__u8 *)&buf->sd;
2429 buf->sd.OffsetOwner = cpu_to_le32(owner_offset);
2430 group_offset = owner_offset + offsetof(struct owner_group_sids, group);
2431 buf->sd.OffsetGroup = cpu_to_le32(group_offset);
2433 setup_owner_group_sids(ptr);
2434 ptr += sizeof(struct owner_group_sids);
2436 buf->sd.OffsetOwner = 0;
2437 buf->sd.OffsetGroup = 0;
2440 buf->ccontext.DataOffset = cpu_to_le16(offsetof(struct crt_sd_ctxt, sd));
2441 buf->ccontext.NameOffset = cpu_to_le16(offsetof(struct crt_sd_ctxt, Name));
2442 buf->ccontext.NameLength = cpu_to_le16(4);
2443 /* SMB2_CREATE_SD_BUFFER_TOKEN is "SecD" */
2448 buf->sd.Revision = 1; /* Must be one see MS-DTYP 2.4.6 */
2451 * ACL is "self relative" ie ACL is stored in contiguous block of memory
2452 * and "DP" ie the DACL is present
2454 buf->sd.Control = cpu_to_le16(ACL_CONTROL_SR | ACL_CONTROL_DP);
2456 /* offset owner, group and Sbz1 and SACL are all zero */
2457 buf->sd.OffsetDacl = cpu_to_le32(ptr - (__u8 *)&buf->sd);
2458 /* Ship the ACL for now. we will copy it into buf later. */
2460 ptr += sizeof(struct smb3_acl);
2462 /* create one ACE to hold the mode embedded in reserved special SID */
2463 acelen = setup_special_mode_ACE((struct cifs_ace *)ptr, (__u64)mode);
2465 acl_size = acelen + sizeof(struct smb3_acl);
2469 /* we do not need to reallocate buffer to add the two more ACEs. plenty of space */
2470 acelen = setup_special_user_owner_ACE((struct cifs_ace *)ptr);
2476 /* and one more ACE to allow access for authenticated users */
2477 acelen = setup_authusers_ACE((struct cifs_ace *)ptr);
2482 acl.AclRevision = ACL_REVISION; /* See 2.4.4.1 of MS-DTYP */
2483 acl.AclSize = cpu_to_le16(acl_size);
2484 acl.AceCount = cpu_to_le16(ace_count);
2485 memcpy(aclptr, &acl, sizeof(struct smb3_acl));
2487 buf->ccontext.DataLength = cpu_to_le32(ptr - (__u8 *)&buf->sd);
2488 *len = roundup(ptr - (__u8 *)buf, 8);
2494 add_sd_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode, bool set_owner)
2496 struct smb2_create_req *req = iov[0].iov_base;
2497 unsigned int num = *num_iovec;
2498 unsigned int len = 0;
2500 iov[num].iov_base = create_sd_buf(mode, set_owner, &len);
2501 if (iov[num].iov_base == NULL)
2503 iov[num].iov_len = len;
2504 if (!req->CreateContextsOffset)
2505 req->CreateContextsOffset = cpu_to_le32(
2506 sizeof(struct smb2_create_req) +
2507 iov[num - 1].iov_len);
2508 le32_add_cpu(&req->CreateContextsLength, len);
2509 *num_iovec = num + 1;
2513 static struct crt_query_id_ctxt *
2514 create_query_id_buf(void)
2516 struct crt_query_id_ctxt *buf;
2518 buf = kzalloc(sizeof(struct crt_query_id_ctxt), GFP_KERNEL);
2522 buf->ccontext.DataOffset = cpu_to_le16(0);
2523 buf->ccontext.DataLength = cpu_to_le32(0);
2524 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2525 (struct crt_query_id_ctxt, Name));
2526 buf->ccontext.NameLength = cpu_to_le16(4);
2527 /* SMB2_CREATE_QUERY_ON_DISK_ID is "QFid" */
2535 /* See MS-SMB2 2.2.13.2.9 */
2537 add_query_id_context(struct kvec *iov, unsigned int *num_iovec)
2539 struct smb2_create_req *req = iov[0].iov_base;
2540 unsigned int num = *num_iovec;
2542 iov[num].iov_base = create_query_id_buf();
2543 if (iov[num].iov_base == NULL)
2545 iov[num].iov_len = sizeof(struct crt_query_id_ctxt);
2546 if (!req->CreateContextsOffset)
2547 req->CreateContextsOffset = cpu_to_le32(
2548 sizeof(struct smb2_create_req) +
2549 iov[num - 1].iov_len);
2550 le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_query_id_ctxt));
2551 *num_iovec = num + 1;
2556 alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
2557 const char *treename, const __le16 *path)
2559 int treename_len, path_len;
2560 struct nls_table *cp;
2561 const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
2566 treename_len = strlen(treename);
2567 if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\'))
2573 path_len = UniStrnlen((wchar_t *)path, PATH_MAX);
2575 /* make room for one path separator only if @path isn't empty */
2576 *out_len = treename_len + (path[0] ? 1 : 0) + path_len;
2579 * final path needs to be 8-byte aligned as specified in
2580 * MS-SMB2 2.2.13 SMB2 CREATE Request.
2582 *out_size = roundup(*out_len * sizeof(__le16), 8);
2583 *out_path = kzalloc(*out_size + sizeof(__le16) /* null */, GFP_KERNEL);
2587 cp = load_nls_default();
2588 cifs_strtoUTF16(*out_path, treename, treename_len, cp);
2590 /* Do not append the separator if the path is empty */
2591 if (path[0] != cpu_to_le16(0x0000)) {
2592 UniStrcat(*out_path, sep);
2593 UniStrcat(*out_path, path);
2601 int smb311_posix_mkdir(const unsigned int xid, struct inode *inode,
2602 umode_t mode, struct cifs_tcon *tcon,
2603 const char *full_path,
2604 struct cifs_sb_info *cifs_sb)
2606 struct smb_rqst rqst;
2607 struct smb2_create_req *req;
2608 struct smb2_create_rsp *rsp = NULL;
2609 struct cifs_ses *ses = tcon->ses;
2610 struct kvec iov[3]; /* make sure at least one for each open context */
2611 struct kvec rsp_iov = {NULL, 0};
2614 __le16 *copy_path = NULL;
2617 unsigned int n_iov = 2;
2618 __u32 file_attributes = 0;
2619 char *pc_buf = NULL;
2621 unsigned int total_len;
2622 __le16 *utf16_path = NULL;
2623 struct TCP_Server_Info *server = cifs_pick_channel(ses);
2625 cifs_dbg(FYI, "mkdir\n");
2627 /* resource #1: path allocation */
2628 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2632 if (!ses || !server) {
2637 /* resource #2: request */
2638 rc = smb2_plain_req_init(SMB2_CREATE, tcon, server,
2639 (void **) &req, &total_len);
2644 if (smb3_encryption_required(tcon))
2645 flags |= CIFS_TRANSFORM_REQ;
2647 req->ImpersonationLevel = IL_IMPERSONATION;
2648 req->DesiredAccess = cpu_to_le32(FILE_WRITE_ATTRIBUTES);
2649 /* File attributes ignored on open (used in create though) */
2650 req->FileAttributes = cpu_to_le32(file_attributes);
2651 req->ShareAccess = FILE_SHARE_ALL_LE;
2652 req->CreateDisposition = cpu_to_le32(FILE_CREATE);
2653 req->CreateOptions = cpu_to_le32(CREATE_NOT_FILE);
2655 iov[0].iov_base = (char *)req;
2656 /* -1 since last byte is buf[0] which is sent below (path) */
2657 iov[0].iov_len = total_len - 1;
2659 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
2661 /* [MS-SMB2] 2.2.13 NameOffset:
2662 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2663 * the SMB2 header, the file name includes a prefix that will
2664 * be processed during DFS name normalization as specified in
2665 * section 3.3.5.9. Otherwise, the file name is relative to
2666 * the share that is identified by the TreeId in the SMB2
2669 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
2672 req->hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
2673 rc = alloc_path_with_tree_prefix(©_path, ©_size,
2675 tcon->treeName, utf16_path);
2679 req->NameLength = cpu_to_le16(name_len * 2);
2680 uni_path_len = copy_size;
2681 /* free before overwriting resource */
2683 utf16_path = copy_path;
2685 uni_path_len = (2 * UniStrnlen((wchar_t *)utf16_path, PATH_MAX)) + 2;
2686 /* MUST set path len (NameLength) to 0 opening root of share */
2687 req->NameLength = cpu_to_le16(uni_path_len - 2);
2688 if (uni_path_len % 8 != 0) {
2689 copy_size = roundup(uni_path_len, 8);
2690 copy_path = kzalloc(copy_size, GFP_KERNEL);
2695 memcpy((char *)copy_path, (const char *)utf16_path,
2697 uni_path_len = copy_size;
2698 /* free before overwriting resource */
2700 utf16_path = copy_path;
2704 iov[1].iov_len = uni_path_len;
2705 iov[1].iov_base = utf16_path;
2706 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2708 if (tcon->posix_extensions) {
2709 /* resource #3: posix buf */
2710 rc = add_posix_context(iov, &n_iov, mode);
2713 pc_buf = iov[n_iov-1].iov_base;
2717 memset(&rqst, 0, sizeof(struct smb_rqst));
2719 rqst.rq_nvec = n_iov;
2721 /* no need to inc num_remote_opens because we close it just below */
2722 trace_smb3_posix_mkdir_enter(xid, tcon->tid, ses->Suid, CREATE_NOT_FILE,
2723 FILE_WRITE_ATTRIBUTES);
2724 /* resource #4: response buffer */
2725 rc = cifs_send_recv(xid, ses, server,
2726 &rqst, &resp_buftype, flags, &rsp_iov);
2728 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
2729 trace_smb3_posix_mkdir_err(xid, tcon->tid, ses->Suid,
2731 FILE_WRITE_ATTRIBUTES, rc);
2732 goto err_free_rsp_buf;
2736 * Although unlikely to be possible for rsp to be null and rc not set,
2737 * adding check below is slightly safer long term (and quiets Coverity
2740 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2747 trace_smb3_posix_mkdir_done(xid, rsp->PersistentFileId, tcon->tid, ses->Suid,
2748 CREATE_NOT_FILE, FILE_WRITE_ATTRIBUTES);
2750 SMB2_close(xid, tcon, rsp->PersistentFileId, rsp->VolatileFileId);
2752 /* Eventually save off posix specific response info and timestaps */
2755 free_rsp_buf(resp_buftype, rsp);
2758 cifs_small_buf_release(req);
2765 SMB2_open_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
2766 struct smb_rqst *rqst, __u8 *oplock,
2767 struct cifs_open_parms *oparms, __le16 *path)
2769 struct smb2_create_req *req;
2770 unsigned int n_iov = 2;
2771 __u32 file_attributes = 0;
2774 unsigned int total_len;
2775 struct kvec *iov = rqst->rq_iov;
2779 rc = smb2_plain_req_init(SMB2_CREATE, tcon, server,
2780 (void **) &req, &total_len);
2784 iov[0].iov_base = (char *)req;
2785 /* -1 since last byte is buf[0] which is sent below (path) */
2786 iov[0].iov_len = total_len - 1;
2788 if (oparms->create_options & CREATE_OPTION_READONLY)
2789 file_attributes |= ATTR_READONLY;
2790 if (oparms->create_options & CREATE_OPTION_SPECIAL)
2791 file_attributes |= ATTR_SYSTEM;
2793 req->ImpersonationLevel = IL_IMPERSONATION;
2794 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
2795 /* File attributes ignored on open (used in create though) */
2796 req->FileAttributes = cpu_to_le32(file_attributes);
2797 req->ShareAccess = FILE_SHARE_ALL_LE;
2799 req->CreateDisposition = cpu_to_le32(oparms->disposition);
2800 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
2801 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
2803 /* [MS-SMB2] 2.2.13 NameOffset:
2804 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2805 * the SMB2 header, the file name includes a prefix that will
2806 * be processed during DFS name normalization as specified in
2807 * section 3.3.5.9. Otherwise, the file name is relative to
2808 * the share that is identified by the TreeId in the SMB2
2811 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
2814 req->hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
2815 rc = alloc_path_with_tree_prefix(©_path, ©_size,
2817 tcon->treeName, path);
2820 req->NameLength = cpu_to_le16(name_len * 2);
2821 uni_path_len = copy_size;
2824 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
2825 /* MUST set path len (NameLength) to 0 opening root of share */
2826 req->NameLength = cpu_to_le16(uni_path_len - 2);
2827 copy_size = uni_path_len;
2828 if (copy_size % 8 != 0)
2829 copy_size = roundup(copy_size, 8);
2830 copy_path = kzalloc(copy_size, GFP_KERNEL);
2833 memcpy((char *)copy_path, (const char *)path,
2835 uni_path_len = copy_size;
2839 iov[1].iov_len = uni_path_len;
2840 iov[1].iov_base = path;
2842 if ((!server->oplocks) || (tcon->no_lease))
2843 *oplock = SMB2_OPLOCK_LEVEL_NONE;
2845 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
2846 *oplock == SMB2_OPLOCK_LEVEL_NONE)
2847 req->RequestedOplockLevel = *oplock;
2848 else if (!(server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING) &&
2849 (oparms->create_options & CREATE_NOT_FILE))
2850 req->RequestedOplockLevel = *oplock; /* no srv lease support */
2852 rc = add_lease_context(server, iov, &n_iov,
2853 oparms->fid->lease_key, oplock);
2858 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
2859 /* need to set Next field of lease context if we request it */
2860 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
2861 struct create_context *ccontext =
2862 (struct create_context *)iov[n_iov-1].iov_base;
2864 cpu_to_le32(server->vals->create_lease_size);
2867 rc = add_durable_context(iov, &n_iov, oparms,
2868 tcon->use_persistent);
2873 if (tcon->posix_extensions) {
2875 struct create_context *ccontext =
2876 (struct create_context *)iov[n_iov-1].iov_base;
2878 cpu_to_le32(iov[n_iov-1].iov_len);
2881 rc = add_posix_context(iov, &n_iov, oparms->mode);
2886 if (tcon->snapshot_time) {
2887 cifs_dbg(FYI, "adding snapshot context\n");
2889 struct create_context *ccontext =
2890 (struct create_context *)iov[n_iov-1].iov_base;
2892 cpu_to_le32(iov[n_iov-1].iov_len);
2895 rc = add_twarp_context(iov, &n_iov, tcon->snapshot_time);
2900 if ((oparms->disposition != FILE_OPEN) && (oparms->cifs_sb)) {
2904 if ((oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) &&
2905 (oparms->mode != ACL_NO_MODE))
2909 oparms->mode = ACL_NO_MODE;
2912 if (oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL)
2917 if (set_owner | set_mode) {
2919 struct create_context *ccontext =
2920 (struct create_context *)iov[n_iov-1].iov_base;
2921 ccontext->Next = cpu_to_le32(iov[n_iov-1].iov_len);
2924 cifs_dbg(FYI, "add sd with mode 0x%x\n", oparms->mode);
2925 rc = add_sd_context(iov, &n_iov, oparms->mode, set_owner);
2932 struct create_context *ccontext =
2933 (struct create_context *)iov[n_iov-1].iov_base;
2934 ccontext->Next = cpu_to_le32(iov[n_iov-1].iov_len);
2936 add_query_id_context(iov, &n_iov);
2938 rqst->rq_nvec = n_iov;
2942 /* rq_iov[0] is the request and is released by cifs_small_buf_release().
2943 * All other vectors are freed by kfree().
2946 SMB2_open_free(struct smb_rqst *rqst)
2950 if (rqst && rqst->rq_iov) {
2951 cifs_small_buf_release(rqst->rq_iov[0].iov_base);
2952 for (i = 1; i < rqst->rq_nvec; i++)
2953 if (rqst->rq_iov[i].iov_base != smb2_padding)
2954 kfree(rqst->rq_iov[i].iov_base);
2959 SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
2960 __u8 *oplock, struct smb2_file_all_info *buf,
2961 struct create_posix_rsp *posix,
2962 struct kvec *err_iov, int *buftype)
2964 struct smb_rqst rqst;
2965 struct smb2_create_rsp *rsp = NULL;
2966 struct cifs_tcon *tcon = oparms->tcon;
2967 struct cifs_ses *ses = tcon->ses;
2968 struct TCP_Server_Info *server = cifs_pick_channel(ses);
2969 struct kvec iov[SMB2_CREATE_IOV_SIZE];
2970 struct kvec rsp_iov = {NULL, 0};
2971 int resp_buftype = CIFS_NO_BUFFER;
2975 cifs_dbg(FYI, "create/open\n");
2976 if (!ses || !server)
2979 if (smb3_encryption_required(tcon))
2980 flags |= CIFS_TRANSFORM_REQ;
2982 memset(&rqst, 0, sizeof(struct smb_rqst));
2983 memset(&iov, 0, sizeof(iov));
2985 rqst.rq_nvec = SMB2_CREATE_IOV_SIZE;
2987 rc = SMB2_open_init(tcon, server,
2988 &rqst, oplock, oparms, path);
2992 trace_smb3_open_enter(xid, tcon->tid, tcon->ses->Suid,
2993 oparms->create_options, oparms->desired_access);
2995 rc = cifs_send_recv(xid, ses, server,
2996 &rqst, &resp_buftype, flags,
2998 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
3001 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
3002 if (err_iov && rsp) {
3004 *buftype = resp_buftype;
3005 resp_buftype = CIFS_NO_BUFFER;
3008 trace_smb3_open_err(xid, tcon->tid, ses->Suid,
3009 oparms->create_options, oparms->desired_access, rc);
3010 if (rc == -EREMCHG) {
3011 pr_warn_once("server share %s deleted\n",
3013 tcon->need_reconnect = true;
3016 } else if (rsp == NULL) /* unlikely to happen, but safer to check */
3019 trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid, ses->Suid,
3020 oparms->create_options, oparms->desired_access);
3022 atomic_inc(&tcon->num_remote_opens);
3023 oparms->fid->persistent_fid = rsp->PersistentFileId;
3024 oparms->fid->volatile_fid = rsp->VolatileFileId;
3025 oparms->fid->access = oparms->desired_access;
3026 #ifdef CONFIG_CIFS_DEBUG2
3027 oparms->fid->mid = le64_to_cpu(rsp->hdr.MessageId);
3028 #endif /* CIFS_DEBUG2 */
3031 buf->CreationTime = rsp->CreationTime;
3032 buf->LastAccessTime = rsp->LastAccessTime;
3033 buf->LastWriteTime = rsp->LastWriteTime;
3034 buf->ChangeTime = rsp->ChangeTime;
3035 buf->AllocationSize = rsp->AllocationSize;
3036 buf->EndOfFile = rsp->EndofFile;
3037 buf->Attributes = rsp->FileAttributes;
3038 buf->NumberOfLinks = cpu_to_le32(1);
3039 buf->DeletePending = 0;
3043 smb2_parse_contexts(server, rsp, &oparms->fid->epoch,
3044 oparms->fid->lease_key, oplock, buf, posix);
3046 SMB2_open_free(&rqst);
3047 free_rsp_buf(resp_buftype, rsp);
3052 SMB2_ioctl_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
3053 struct smb_rqst *rqst,
3054 u64 persistent_fid, u64 volatile_fid, u32 opcode,
3055 char *in_data, u32 indatalen,
3056 __u32 max_response_size)
3058 struct smb2_ioctl_req *req;
3059 struct kvec *iov = rqst->rq_iov;
3060 unsigned int total_len;
3064 rc = smb2_ioctl_req_init(opcode, tcon, server,
3065 (void **) &req, &total_len);
3071 * indatalen is usually small at a couple of bytes max, so
3072 * just allocate through generic pool
3074 in_data_buf = kmemdup(in_data, indatalen, GFP_NOFS);
3076 cifs_small_buf_release(req);
3081 req->CtlCode = cpu_to_le32(opcode);
3082 req->PersistentFileId = persistent_fid;
3083 req->VolatileFileId = volatile_fid;
3085 iov[0].iov_base = (char *)req;
3087 * If no input data, the size of ioctl struct in
3088 * protocol spec still includes a 1 byte data buffer,
3089 * but if input data passed to ioctl, we do not
3090 * want to double count this, so we do not send
3091 * the dummy one byte of data in iovec[0] if sending
3092 * input data (in iovec[1]).
3095 req->InputCount = cpu_to_le32(indatalen);
3096 /* do not set InputOffset if no input data */
3098 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer));
3100 iov[0].iov_len = total_len - 1;
3101 iov[1].iov_base = in_data_buf;
3102 iov[1].iov_len = indatalen;
3105 iov[0].iov_len = total_len;
3108 req->OutputOffset = 0;
3109 req->OutputCount = 0; /* MBZ */
3112 * In most cases max_response_size is set to 16K (CIFSMaxBufSize)
3113 * We Could increase default MaxOutputResponse, but that could require
3114 * more credits. Windows typically sets this smaller, but for some
3115 * ioctls it may be useful to allow server to send more. No point
3116 * limiting what the server can send as long as fits in one credit
3117 * We can not handle more than CIFS_MAX_BUF_SIZE yet but may want
3118 * to increase this limit up in the future.
3119 * Note that for snapshot queries that servers like Azure expect that
3120 * the first query be minimal size (and just used to get the number/size
3121 * of previous versions) so response size must be specified as EXACTLY
3122 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
3123 * of eight bytes. Currently that is the only case where we set max
3124 * response size smaller.
3126 req->MaxOutputResponse = cpu_to_le32(max_response_size);
3127 req->hdr.CreditCharge =
3128 cpu_to_le16(DIV_ROUND_UP(max(indatalen, max_response_size),
3129 SMB2_MAX_BUFFER_SIZE));
3130 /* always an FSCTL (for now) */
3131 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
3133 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
3134 if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO)
3135 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
3141 SMB2_ioctl_free(struct smb_rqst *rqst)
3144 if (rqst && rqst->rq_iov) {
3145 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
3146 for (i = 1; i < rqst->rq_nvec; i++)
3147 if (rqst->rq_iov[i].iov_base != smb2_padding)
3148 kfree(rqst->rq_iov[i].iov_base);
3154 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
3157 SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
3158 u64 volatile_fid, u32 opcode, char *in_data, u32 indatalen,
3159 u32 max_out_data_len, char **out_data,
3160 u32 *plen /* returned data len */)
3162 struct smb_rqst rqst;
3163 struct smb2_ioctl_rsp *rsp = NULL;
3164 struct cifs_ses *ses;
3165 struct TCP_Server_Info *server;
3166 struct kvec iov[SMB2_IOCTL_IOV_SIZE];
3167 struct kvec rsp_iov = {NULL, 0};
3168 int resp_buftype = CIFS_NO_BUFFER;
3172 cifs_dbg(FYI, "SMB2 IOCTL\n");
3174 if (out_data != NULL)
3177 /* zero out returned data len, in case of error */
3188 server = cifs_pick_channel(ses);
3192 if (smb3_encryption_required(tcon))
3193 flags |= CIFS_TRANSFORM_REQ;
3195 memset(&rqst, 0, sizeof(struct smb_rqst));
3196 memset(&iov, 0, sizeof(iov));
3198 rqst.rq_nvec = SMB2_IOCTL_IOV_SIZE;
3200 rc = SMB2_ioctl_init(tcon, server,
3201 &rqst, persistent_fid, volatile_fid, opcode,
3202 in_data, indatalen, max_out_data_len);
3206 rc = cifs_send_recv(xid, ses, server,
3207 &rqst, &resp_buftype, flags,
3209 rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
3212 trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid,
3213 ses->Suid, 0, opcode, rc);
3215 if ((rc != 0) && (rc != -EINVAL) && (rc != -E2BIG)) {
3216 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
3218 } else if (rc == -EINVAL) {
3219 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
3220 (opcode != FSCTL_SRV_COPYCHUNK)) {
3221 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
3224 } else if (rc == -E2BIG) {
3225 if (opcode != FSCTL_QUERY_ALLOCATED_RANGES) {
3226 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
3231 /* check if caller wants to look at return data or just return rc */
3232 if ((plen == NULL) || (out_data == NULL))
3236 * Although unlikely to be possible for rsp to be null and rc not set,
3237 * adding check below is slightly safer long term (and quiets Coverity
3245 *plen = le32_to_cpu(rsp->OutputCount);
3247 /* We check for obvious errors in the output buffer length and offset */
3249 goto ioctl_exit; /* server returned no data */
3250 else if (*plen > rsp_iov.iov_len || *plen > 0xFF00) {
3251 cifs_tcon_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
3257 if (rsp_iov.iov_len - *plen < le32_to_cpu(rsp->OutputOffset)) {
3258 cifs_tcon_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
3259 le32_to_cpu(rsp->OutputOffset));
3265 *out_data = kmemdup((char *)rsp + le32_to_cpu(rsp->OutputOffset),
3267 if (*out_data == NULL) {
3273 SMB2_ioctl_free(&rqst);
3274 free_rsp_buf(resp_buftype, rsp);
3279 * Individual callers to ioctl worker function follow
3283 SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
3284 u64 persistent_fid, u64 volatile_fid)
3287 struct compress_ioctl fsctl_input;
3288 char *ret_data = NULL;
3290 fsctl_input.CompressionState =
3291 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
3293 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
3294 FSCTL_SET_COMPRESSION,
3295 (char *)&fsctl_input /* data input */,
3296 2 /* in data len */, CIFSMaxBufSize /* max out data */,
3297 &ret_data /* out data */, NULL);
3299 cifs_dbg(FYI, "set compression rc %d\n", rc);
3305 SMB2_close_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
3306 struct smb_rqst *rqst,
3307 u64 persistent_fid, u64 volatile_fid, bool query_attrs)
3309 struct smb2_close_req *req;
3310 struct kvec *iov = rqst->rq_iov;
3311 unsigned int total_len;
3314 rc = smb2_plain_req_init(SMB2_CLOSE, tcon, server,
3315 (void **) &req, &total_len);
3319 req->PersistentFileId = persistent_fid;
3320 req->VolatileFileId = volatile_fid;
3322 req->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
3325 iov[0].iov_base = (char *)req;
3326 iov[0].iov_len = total_len;
3332 SMB2_close_free(struct smb_rqst *rqst)
3334 if (rqst && rqst->rq_iov)
3335 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
3339 __SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
3340 u64 persistent_fid, u64 volatile_fid,
3341 struct smb2_file_network_open_info *pbuf)
3343 struct smb_rqst rqst;
3344 struct smb2_close_rsp *rsp = NULL;
3345 struct cifs_ses *ses = tcon->ses;
3346 struct TCP_Server_Info *server = cifs_pick_channel(ses);
3348 struct kvec rsp_iov;
3349 int resp_buftype = CIFS_NO_BUFFER;
3352 bool query_attrs = false;
3354 cifs_dbg(FYI, "Close\n");
3356 if (!ses || !server)
3359 if (smb3_encryption_required(tcon))
3360 flags |= CIFS_TRANSFORM_REQ;
3362 memset(&rqst, 0, sizeof(struct smb_rqst));
3363 memset(&iov, 0, sizeof(iov));
3367 /* check if need to ask server to return timestamps in close response */
3371 trace_smb3_close_enter(xid, persistent_fid, tcon->tid, ses->Suid);
3372 rc = SMB2_close_init(tcon, server,
3373 &rqst, persistent_fid, volatile_fid,
3378 rc = cifs_send_recv(xid, ses, server,
3379 &rqst, &resp_buftype, flags, &rsp_iov);
3380 rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
3383 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
3384 trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid,
3388 trace_smb3_close_done(xid, persistent_fid, tcon->tid,
3391 * Note that have to subtract 4 since struct network_open_info
3392 * has a final 4 byte pad that close response does not have
3395 memcpy(pbuf, (char *)&rsp->CreationTime, sizeof(*pbuf) - 4);
3398 atomic_dec(&tcon->num_remote_opens);
3400 SMB2_close_free(&rqst);
3401 free_rsp_buf(resp_buftype, rsp);
3403 /* retry close in a worker thread if this one is interrupted */
3404 if (is_interrupt_error(rc)) {
3407 tmp_rc = smb2_handle_cancelled_close(tcon, persistent_fid,
3410 cifs_dbg(VFS, "handle cancelled close fid 0x%llx returned error %d\n",
3411 persistent_fid, tmp_rc);
3417 SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
3418 u64 persistent_fid, u64 volatile_fid)
3420 return __SMB2_close(xid, tcon, persistent_fid, volatile_fid, NULL);
3424 smb2_validate_iov(unsigned int offset, unsigned int buffer_length,
3425 struct kvec *iov, unsigned int min_buf_size)
3427 unsigned int smb_len = iov->iov_len;
3428 char *end_of_smb = smb_len + (char *)iov->iov_base;
3429 char *begin_of_buf = offset + (char *)iov->iov_base;
3430 char *end_of_buf = begin_of_buf + buffer_length;
3433 if (buffer_length < min_buf_size) {
3434 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
3435 buffer_length, min_buf_size);
3439 /* check if beyond RFC1001 maximum length */
3440 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
3441 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
3442 buffer_length, smb_len);
3446 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
3447 cifs_dbg(VFS, "Invalid server response, bad offset to data\n");
3455 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
3456 * Caller must free buffer.
3459 smb2_validate_and_copy_iov(unsigned int offset, unsigned int buffer_length,
3460 struct kvec *iov, unsigned int minbufsize,
3463 char *begin_of_buf = offset + (char *)iov->iov_base;
3469 rc = smb2_validate_iov(offset, buffer_length, iov, minbufsize);
3473 memcpy(data, begin_of_buf, buffer_length);
3479 SMB2_query_info_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
3480 struct smb_rqst *rqst,
3481 u64 persistent_fid, u64 volatile_fid,
3482 u8 info_class, u8 info_type, u32 additional_info,
3483 size_t output_len, size_t input_len, void *input)
3485 struct smb2_query_info_req *req;
3486 struct kvec *iov = rqst->rq_iov;
3487 unsigned int total_len;
3490 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, server,
3491 (void **) &req, &total_len);
3495 req->InfoType = info_type;
3496 req->FileInfoClass = info_class;
3497 req->PersistentFileId = persistent_fid;
3498 req->VolatileFileId = volatile_fid;
3499 req->AdditionalInformation = cpu_to_le32(additional_info);
3501 req->OutputBufferLength = cpu_to_le32(output_len);
3503 req->InputBufferLength = cpu_to_le32(input_len);
3504 /* total_len for smb query request never close to le16 max */
3505 req->InputBufferOffset = cpu_to_le16(total_len - 1);
3506 memcpy(req->Buffer, input, input_len);
3509 iov[0].iov_base = (char *)req;
3511 iov[0].iov_len = total_len - 1 + input_len;
3516 SMB2_query_info_free(struct smb_rqst *rqst)
3518 if (rqst && rqst->rq_iov)
3519 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
3523 query_info(const unsigned int xid, struct cifs_tcon *tcon,
3524 u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
3525 u32 additional_info, size_t output_len, size_t min_len, void **data,
3528 struct smb_rqst rqst;
3529 struct smb2_query_info_rsp *rsp = NULL;
3531 struct kvec rsp_iov;
3533 int resp_buftype = CIFS_NO_BUFFER;
3534 struct cifs_ses *ses = tcon->ses;
3535 struct TCP_Server_Info *server;
3537 bool allocated = false;
3539 cifs_dbg(FYI, "Query Info\n");
3543 server = cifs_pick_channel(ses);
3547 if (smb3_encryption_required(tcon))
3548 flags |= CIFS_TRANSFORM_REQ;
3550 memset(&rqst, 0, sizeof(struct smb_rqst));
3551 memset(&iov, 0, sizeof(iov));
3555 rc = SMB2_query_info_init(tcon, server,
3556 &rqst, persistent_fid, volatile_fid,
3557 info_class, info_type, additional_info,
3558 output_len, 0, NULL);
3562 trace_smb3_query_info_enter(xid, persistent_fid, tcon->tid,
3563 ses->Suid, info_class, (__u32)info_type);
3565 rc = cifs_send_recv(xid, ses, server,
3566 &rqst, &resp_buftype, flags, &rsp_iov);
3567 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
3570 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
3571 trace_smb3_query_info_err(xid, persistent_fid, tcon->tid,
3572 ses->Suid, info_class, (__u32)info_type, rc);
3576 trace_smb3_query_info_done(xid, persistent_fid, tcon->tid,
3577 ses->Suid, info_class, (__u32)info_type);
3580 *dlen = le32_to_cpu(rsp->OutputBufferLength);
3582 *data = kmalloc(*dlen, GFP_KERNEL);
3585 "Error %d allocating memory for acl\n",
3595 rc = smb2_validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset),
3596 le32_to_cpu(rsp->OutputBufferLength),
3597 &rsp_iov, min_len, *data);
3598 if (rc && allocated) {
3605 SMB2_query_info_free(&rqst);
3606 free_rsp_buf(resp_buftype, rsp);
3610 int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
3611 u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data)
3613 return query_info(xid, tcon, persistent_fid, volatile_fid,
3614 FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0,
3615 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
3616 sizeof(struct smb2_file_all_info), (void **)&data,
3621 /* currently unused, as now we are doing compounding instead (see smb311_posix_query_path_info) */
3623 SMB311_posix_query_info(const unsigned int xid, struct cifs_tcon *tcon,
3624 u64 persistent_fid, u64 volatile_fid, struct smb311_posix_qinfo *data, u32 *plen)
3626 size_t output_len = sizeof(struct smb311_posix_qinfo *) +
3627 (sizeof(struct cifs_sid) * 2) + (PATH_MAX * 2);
3630 return query_info(xid, tcon, persistent_fid, volatile_fid,
3631 SMB_FIND_FILE_POSIX_INFO, SMB2_O_INFO_FILE, 0,
3632 output_len, sizeof(struct smb311_posix_qinfo), (void **)&data, plen);
3633 /* Note caller must free "data" (passed in above). It may be allocated in query_info call */
3638 SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
3639 u64 persistent_fid, u64 volatile_fid,
3640 void **data, u32 *plen, u32 extra_info)
3642 __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
3646 return query_info(xid, tcon, persistent_fid, volatile_fid,
3647 0, SMB2_O_INFO_SECURITY, additional_info,
3648 SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen);
3652 SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
3653 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
3655 return query_info(xid, tcon, persistent_fid, volatile_fid,
3656 FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0,
3657 sizeof(struct smb2_file_internal_info),
3658 sizeof(struct smb2_file_internal_info),
3659 (void **)&uniqueid, NULL);
3663 * CHANGE_NOTIFY Request is sent to get notifications on changes to a directory
3664 * See MS-SMB2 2.2.35 and 2.2.36
3668 SMB2_notify_init(const unsigned int xid, struct smb_rqst *rqst,
3669 struct cifs_tcon *tcon, struct TCP_Server_Info *server,
3670 u64 persistent_fid, u64 volatile_fid,
3671 u32 completion_filter, bool watch_tree)
3673 struct smb2_change_notify_req *req;
3674 struct kvec *iov = rqst->rq_iov;
3675 unsigned int total_len;
3678 rc = smb2_plain_req_init(SMB2_CHANGE_NOTIFY, tcon, server,
3679 (void **) &req, &total_len);
3683 req->PersistentFileId = persistent_fid;
3684 req->VolatileFileId = volatile_fid;
3685 /* See note 354 of MS-SMB2, 64K max */
3686 req->OutputBufferLength =
3687 cpu_to_le32(SMB2_MAX_BUFFER_SIZE - MAX_SMB2_HDR_SIZE);
3688 req->CompletionFilter = cpu_to_le32(completion_filter);
3690 req->Flags = cpu_to_le16(SMB2_WATCH_TREE);
3694 iov[0].iov_base = (char *)req;
3695 iov[0].iov_len = total_len;
3701 SMB2_change_notify(const unsigned int xid, struct cifs_tcon *tcon,
3702 u64 persistent_fid, u64 volatile_fid, bool watch_tree,
3703 u32 completion_filter)
3705 struct cifs_ses *ses = tcon->ses;
3706 struct TCP_Server_Info *server = cifs_pick_channel(ses);
3707 struct smb_rqst rqst;
3709 struct kvec rsp_iov = {NULL, 0};
3710 int resp_buftype = CIFS_NO_BUFFER;
3714 cifs_dbg(FYI, "change notify\n");
3715 if (!ses || !server)
3718 if (smb3_encryption_required(tcon))
3719 flags |= CIFS_TRANSFORM_REQ;
3721 memset(&rqst, 0, sizeof(struct smb_rqst));
3722 memset(&iov, 0, sizeof(iov));
3726 rc = SMB2_notify_init(xid, &rqst, tcon, server,
3727 persistent_fid, volatile_fid,
3728 completion_filter, watch_tree);
3732 trace_smb3_notify_enter(xid, persistent_fid, tcon->tid, ses->Suid,
3733 (u8)watch_tree, completion_filter);
3734 rc = cifs_send_recv(xid, ses, server,
3735 &rqst, &resp_buftype, flags, &rsp_iov);
3738 cifs_stats_fail_inc(tcon, SMB2_CHANGE_NOTIFY_HE);
3739 trace_smb3_notify_err(xid, persistent_fid, tcon->tid, ses->Suid,
3740 (u8)watch_tree, completion_filter, rc);
3742 trace_smb3_notify_done(xid, persistent_fid, tcon->tid,
3743 ses->Suid, (u8)watch_tree, completion_filter);
3747 cifs_small_buf_release(rqst.rq_iov[0].iov_base); /* request */
3748 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
3755 * This is a no-op for now. We're not really interested in the reply, but
3756 * rather in the fact that the server sent one and that server->lstrp
3759 * FIXME: maybe we should consider checking that the reply matches request?
3762 smb2_echo_callback(struct mid_q_entry *mid)
3764 struct TCP_Server_Info *server = mid->callback_data;
3765 struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
3766 struct cifs_credits credits = { .value = 0, .instance = 0 };
3768 if (mid->mid_state == MID_RESPONSE_RECEIVED
3769 || mid->mid_state == MID_RESPONSE_MALFORMED) {
3770 credits.value = le16_to_cpu(rsp->hdr.CreditRequest);
3771 credits.instance = server->reconnect_instance;
3775 add_credits(server, &credits, CIFS_ECHO_OP);
3778 void smb2_reconnect_server(struct work_struct *work)
3780 struct TCP_Server_Info *server = container_of(work,
3781 struct TCP_Server_Info, reconnect.work);
3782 struct TCP_Server_Info *pserver;
3783 struct cifs_ses *ses, *ses2;
3784 struct cifs_tcon *tcon, *tcon2;
3785 struct list_head tmp_list, tmp_ses_list;
3786 bool tcon_exist = false, ses_exist = false;
3787 bool tcon_selected = false;
3789 bool resched = false;
3791 /* If server is a channel, select the primary channel */
3792 pserver = CIFS_SERVER_IS_CHAN(server) ? server->primary_server : server;
3794 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
3795 mutex_lock(&pserver->reconnect_mutex);
3797 INIT_LIST_HEAD(&tmp_list);
3798 INIT_LIST_HEAD(&tmp_ses_list);
3799 cifs_dbg(FYI, "Reconnecting tcons and channels\n");
3801 spin_lock(&cifs_tcp_ses_lock);
3802 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
3804 tcon_selected = false;
3806 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
3807 if (tcon->need_reconnect || tcon->need_reopen_files) {
3809 list_add_tail(&tcon->rlist, &tmp_list);
3810 tcon_selected = tcon_exist = true;
3814 * IPC has the same lifetime as its session and uses its
3817 if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) {
3818 list_add_tail(&ses->tcon_ipc->rlist, &tmp_list);
3819 tcon_selected = tcon_exist = true;
3823 * handle the case where channel needs to reconnect
3824 * binding session, but tcon is healthy (some other channel
3827 spin_lock(&ses->chan_lock);
3828 if (!tcon_selected && cifs_chan_needs_reconnect(ses, server)) {
3829 list_add_tail(&ses->rlist, &tmp_ses_list);
3833 spin_unlock(&ses->chan_lock);
3836 * Get the reference to server struct to be sure that the last call of
3837 * cifs_put_tcon() in the loop below won't release the server pointer.
3839 if (tcon_exist || ses_exist)
3840 server->srv_count++;
3842 spin_unlock(&cifs_tcp_ses_lock);
3844 list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
3845 rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon, server);
3847 cifs_reopen_persistent_handles(tcon);
3850 list_del_init(&tcon->rlist);
3852 cifs_put_smb_ses(tcon->ses);
3854 cifs_put_tcon(tcon);
3860 /* allocate a dummy tcon struct used for reconnect */
3861 tcon = kzalloc(sizeof(struct cifs_tcon), GFP_KERNEL);
3864 list_for_each_entry_safe(ses, ses2, &tmp_ses_list, rlist) {
3865 list_del_init(&ses->rlist);
3866 cifs_put_smb_ses(ses);
3871 tcon->status = TID_GOOD;
3872 tcon->retry = false;
3873 tcon->need_reconnect = false;
3875 /* now reconnect sessions for necessary channels */
3876 list_for_each_entry_safe(ses, ses2, &tmp_ses_list, rlist) {
3878 rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon, server);
3881 list_del_init(&ses->rlist);
3882 cifs_put_smb_ses(ses);
3887 cifs_dbg(FYI, "Reconnecting tcons and channels finished\n");
3889 queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
3890 mutex_unlock(&pserver->reconnect_mutex);
3892 /* now we can safely release srv struct */
3893 if (tcon_exist || ses_exist)
3894 cifs_put_tcp_session(server, 1);
3898 SMB2_echo(struct TCP_Server_Info *server)
3900 struct smb2_echo_req *req;
3903 struct smb_rqst rqst = { .rq_iov = iov,
3905 unsigned int total_len;
3907 cifs_dbg(FYI, "In echo request for conn_id %lld\n", server->conn_id);
3909 spin_lock(&server->srv_lock);
3910 if (server->ops->need_neg &&
3911 server->ops->need_neg(server)) {
3912 spin_unlock(&server->srv_lock);
3913 /* No need to send echo on newly established connections */
3914 mod_delayed_work(cifsiod_wq, &server->reconnect, 0);
3917 spin_unlock(&server->srv_lock);
3919 rc = smb2_plain_req_init(SMB2_ECHO, NULL, server,
3920 (void **)&req, &total_len);
3924 req->hdr.CreditRequest = cpu_to_le16(1);
3926 iov[0].iov_len = total_len;
3927 iov[0].iov_base = (char *)req;
3929 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
3930 server, CIFS_ECHO_OP, NULL);
3932 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
3934 cifs_small_buf_release(req);
3939 SMB2_flush_free(struct smb_rqst *rqst)
3941 if (rqst && rqst->rq_iov)
3942 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
3946 SMB2_flush_init(const unsigned int xid, struct smb_rqst *rqst,
3947 struct cifs_tcon *tcon, struct TCP_Server_Info *server,
3948 u64 persistent_fid, u64 volatile_fid)
3950 struct smb2_flush_req *req;
3951 struct kvec *iov = rqst->rq_iov;
3952 unsigned int total_len;
3955 rc = smb2_plain_req_init(SMB2_FLUSH, tcon, server,
3956 (void **) &req, &total_len);
3960 req->PersistentFileId = persistent_fid;
3961 req->VolatileFileId = volatile_fid;
3963 iov[0].iov_base = (char *)req;
3964 iov[0].iov_len = total_len;
3970 SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
3973 struct cifs_ses *ses = tcon->ses;
3974 struct smb_rqst rqst;
3976 struct kvec rsp_iov = {NULL, 0};
3977 struct TCP_Server_Info *server = cifs_pick_channel(ses);
3978 int resp_buftype = CIFS_NO_BUFFER;
3982 cifs_dbg(FYI, "flush\n");
3983 if (!ses || !(ses->server))
3986 if (smb3_encryption_required(tcon))
3987 flags |= CIFS_TRANSFORM_REQ;
3989 memset(&rqst, 0, sizeof(struct smb_rqst));
3990 memset(&iov, 0, sizeof(iov));
3994 rc = SMB2_flush_init(xid, &rqst, tcon, server,
3995 persistent_fid, volatile_fid);
3999 trace_smb3_flush_enter(xid, persistent_fid, tcon->tid, ses->Suid);
4000 rc = cifs_send_recv(xid, ses, server,
4001 &rqst, &resp_buftype, flags, &rsp_iov);
4004 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
4005 trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid,
4008 trace_smb3_flush_done(xid, persistent_fid, tcon->tid,
4012 SMB2_flush_free(&rqst);
4013 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
4018 * To form a chain of read requests, any read requests after the first should
4019 * have the end_of_chain boolean set to true.
4022 smb2_new_read_req(void **buf, unsigned int *total_len,
4023 struct cifs_io_parms *io_parms, struct cifs_readdata *rdata,
4024 unsigned int remaining_bytes, int request_type)
4027 struct smb2_read_req *req = NULL;
4028 struct smb2_hdr *shdr;
4029 struct TCP_Server_Info *server = io_parms->server;
4031 rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, server,
4032 (void **) &req, total_len);
4037 return -ECONNABORTED;
4040 shdr->Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid);
4042 req->PersistentFileId = io_parms->persistent_fid;
4043 req->VolatileFileId = io_parms->volatile_fid;
4044 req->ReadChannelInfoOffset = 0; /* reserved */
4045 req->ReadChannelInfoLength = 0; /* reserved */
4046 req->Channel = 0; /* reserved */
4047 req->MinimumCount = 0;
4048 req->Length = cpu_to_le32(io_parms->length);
4049 req->Offset = cpu_to_le64(io_parms->offset);
4051 trace_smb3_read_enter(0 /* xid */,
4052 io_parms->persistent_fid,
4053 io_parms->tcon->tid, io_parms->tcon->ses->Suid,
4054 io_parms->offset, io_parms->length);
4055 #ifdef CONFIG_CIFS_SMB_DIRECT
4057 * If we want to do a RDMA write, fill in and append
4058 * smbd_buffer_descriptor_v1 to the end of read request
4060 if (server->rdma && rdata && !server->sign &&
4061 rdata->bytes >= server->smbd_conn->rdma_readwrite_threshold) {
4063 struct smbd_buffer_descriptor_v1 *v1;
4064 bool need_invalidate = server->dialect == SMB30_PROT_ID;
4066 rdata->mr = smbd_register_mr(
4067 server->smbd_conn, rdata->pages,
4068 rdata->nr_pages, rdata->page_offset,
4069 rdata->tailsz, true, need_invalidate);
4073 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
4074 if (need_invalidate)
4075 req->Channel = SMB2_CHANNEL_RDMA_V1;
4076 req->ReadChannelInfoOffset =
4077 cpu_to_le16(offsetof(struct smb2_read_req, Buffer));
4078 req->ReadChannelInfoLength =
4079 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
4080 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
4081 v1->offset = cpu_to_le64(rdata->mr->mr->iova);
4082 v1->token = cpu_to_le32(rdata->mr->mr->rkey);
4083 v1->length = cpu_to_le32(rdata->mr->mr->length);
4085 *total_len += sizeof(*v1) - 1;
4088 if (request_type & CHAINED_REQUEST) {
4089 if (!(request_type & END_OF_CHAIN)) {
4090 /* next 8-byte aligned request */
4091 *total_len = DIV_ROUND_UP(*total_len, 8) * 8;
4092 shdr->NextCommand = cpu_to_le32(*total_len);
4093 } else /* END_OF_CHAIN */
4094 shdr->NextCommand = 0;
4095 if (request_type & RELATED_REQUEST) {
4096 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
4098 * Related requests use info from previous read request
4101 shdr->SessionId = cpu_to_le64(0xFFFFFFFFFFFFFFFF);
4102 shdr->Id.SyncId.TreeId = cpu_to_le32(0xFFFFFFFF);
4103 req->PersistentFileId = (u64)-1;
4104 req->VolatileFileId = (u64)-1;
4107 if (remaining_bytes > io_parms->length)
4108 req->RemainingBytes = cpu_to_le32(remaining_bytes);
4110 req->RemainingBytes = 0;
4117 smb2_readv_callback(struct mid_q_entry *mid)
4119 struct cifs_readdata *rdata = mid->callback_data;
4120 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
4121 struct TCP_Server_Info *server = rdata->server;
4122 struct smb2_hdr *shdr =
4123 (struct smb2_hdr *)rdata->iov[0].iov_base;
4124 struct cifs_credits credits = { .value = 0, .instance = 0 };
4125 struct smb_rqst rqst = { .rq_iov = &rdata->iov[1],
4127 .rq_pages = rdata->pages,
4128 .rq_offset = rdata->page_offset,
4129 .rq_npages = rdata->nr_pages,
4130 .rq_pagesz = rdata->pagesz,
4131 .rq_tailsz = rdata->tailsz };
4133 WARN_ONCE(rdata->server != mid->server,
4134 "rdata server %p != mid server %p",
4135 rdata->server, mid->server);
4137 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
4138 __func__, mid->mid, mid->mid_state, rdata->result,
4141 switch (mid->mid_state) {
4142 case MID_RESPONSE_RECEIVED:
4143 credits.value = le16_to_cpu(shdr->CreditRequest);
4144 credits.instance = server->reconnect_instance;
4145 /* result already set, check signature */
4146 if (server->sign && !mid->decrypted) {
4149 rc = smb2_verify_signature(&rqst, server);
4151 cifs_tcon_dbg(VFS, "SMB signature verification returned error = %d\n",
4154 /* FIXME: should this be counted toward the initiating task? */
4155 task_io_account_read(rdata->got_bytes);
4156 cifs_stats_bytes_read(tcon, rdata->got_bytes);
4158 case MID_REQUEST_SUBMITTED:
4159 case MID_RETRY_NEEDED:
4160 rdata->result = -EAGAIN;
4161 if (server->sign && rdata->got_bytes)
4162 /* reset bytes number since we can not check a sign */
4163 rdata->got_bytes = 0;
4164 /* FIXME: should this be counted toward the initiating task? */
4165 task_io_account_read(rdata->got_bytes);
4166 cifs_stats_bytes_read(tcon, rdata->got_bytes);
4168 case MID_RESPONSE_MALFORMED:
4169 credits.value = le16_to_cpu(shdr->CreditRequest);
4170 credits.instance = server->reconnect_instance;
4173 rdata->result = -EIO;
4175 #ifdef CONFIG_CIFS_SMB_DIRECT
4177 * If this rdata has a memmory registered, the MR can be freed
4178 * MR needs to be freed as soon as I/O finishes to prevent deadlock
4179 * because they have limited number and are used for future I/Os
4182 smbd_deregister_mr(rdata->mr);
4186 if (rdata->result && rdata->result != -ENODATA) {
4187 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
4188 trace_smb3_read_err(0 /* xid */,
4189 rdata->cfile->fid.persistent_fid,
4190 tcon->tid, tcon->ses->Suid, rdata->offset,
4191 rdata->bytes, rdata->result);
4193 trace_smb3_read_done(0 /* xid */,
4194 rdata->cfile->fid.persistent_fid,
4195 tcon->tid, tcon->ses->Suid,
4196 rdata->offset, rdata->got_bytes);
4198 queue_work(cifsiod_wq, &rdata->work);
4200 add_credits(server, &credits, 0);
4203 /* smb2_async_readv - send an async read, and set up mid to handle result */
4205 smb2_async_readv(struct cifs_readdata *rdata)
4209 struct smb2_hdr *shdr;
4210 struct cifs_io_parms io_parms;
4211 struct smb_rqst rqst = { .rq_iov = rdata->iov,
4213 struct TCP_Server_Info *server;
4214 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
4215 unsigned int total_len;
4217 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
4218 __func__, rdata->offset, rdata->bytes);
4221 rdata->server = cifs_pick_channel(tcon->ses);
4223 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
4224 io_parms.server = server = rdata->server;
4225 io_parms.offset = rdata->offset;
4226 io_parms.length = rdata->bytes;
4227 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
4228 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
4229 io_parms.pid = rdata->pid;
4231 rc = smb2_new_read_req(
4232 (void **) &buf, &total_len, &io_parms, rdata, 0, 0);
4236 if (smb3_encryption_required(io_parms.tcon))
4237 flags |= CIFS_TRANSFORM_REQ;
4239 rdata->iov[0].iov_base = buf;
4240 rdata->iov[0].iov_len = total_len;
4242 shdr = (struct smb2_hdr *)buf;
4244 if (rdata->credits.value > 0) {
4245 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
4246 SMB2_MAX_BUFFER_SIZE));
4247 shdr->CreditRequest = cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 8);
4249 rc = adjust_credits(server, &rdata->credits, rdata->bytes);
4251 goto async_readv_out;
4253 flags |= CIFS_HAS_CREDITS;
4256 kref_get(&rdata->refcount);
4257 rc = cifs_call_async(server, &rqst,
4258 cifs_readv_receive, smb2_readv_callback,
4259 smb3_handle_read_data, rdata, flags,
4262 kref_put(&rdata->refcount, cifs_readdata_release);
4263 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
4264 trace_smb3_read_err(0 /* xid */, io_parms.persistent_fid,
4266 io_parms.tcon->ses->Suid,
4267 io_parms.offset, io_parms.length, rc);
4271 cifs_small_buf_release(buf);
4276 SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
4277 unsigned int *nbytes, char **buf, int *buf_type)
4279 struct smb_rqst rqst;
4280 int resp_buftype, rc;
4281 struct smb2_read_req *req = NULL;
4282 struct smb2_read_rsp *rsp = NULL;
4284 struct kvec rsp_iov;
4285 unsigned int total_len;
4286 int flags = CIFS_LOG_ERROR;
4287 struct cifs_ses *ses = io_parms->tcon->ses;
4289 if (!io_parms->server)
4290 io_parms->server = cifs_pick_channel(io_parms->tcon->ses);
4293 rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0);
4297 if (smb3_encryption_required(io_parms->tcon))
4298 flags |= CIFS_TRANSFORM_REQ;
4300 iov[0].iov_base = (char *)req;
4301 iov[0].iov_len = total_len;
4303 memset(&rqst, 0, sizeof(struct smb_rqst));
4307 rc = cifs_send_recv(xid, ses, io_parms->server,
4308 &rqst, &resp_buftype, flags, &rsp_iov);
4309 rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
4312 if (rc != -ENODATA) {
4313 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
4314 cifs_dbg(VFS, "Send error in read = %d\n", rc);
4315 trace_smb3_read_err(xid,
4316 req->PersistentFileId,
4317 io_parms->tcon->tid, ses->Suid,
4318 io_parms->offset, io_parms->length,
4321 trace_smb3_read_done(xid, req->PersistentFileId, io_parms->tcon->tid,
4322 ses->Suid, io_parms->offset, 0);
4323 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
4324 cifs_small_buf_release(req);
4325 return rc == -ENODATA ? 0 : rc;
4327 trace_smb3_read_done(xid,
4328 req->PersistentFileId,
4329 io_parms->tcon->tid, ses->Suid,
4330 io_parms->offset, io_parms->length);
4332 cifs_small_buf_release(req);
4334 *nbytes = le32_to_cpu(rsp->DataLength);
4335 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
4336 (*nbytes > io_parms->length)) {
4337 cifs_dbg(FYI, "bad length %d for count %d\n",
4338 *nbytes, io_parms->length);
4344 memcpy(*buf, (char *)rsp + rsp->DataOffset, *nbytes);
4345 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
4346 } else if (resp_buftype != CIFS_NO_BUFFER) {
4347 *buf = rsp_iov.iov_base;
4348 if (resp_buftype == CIFS_SMALL_BUFFER)
4349 *buf_type = CIFS_SMALL_BUFFER;
4350 else if (resp_buftype == CIFS_LARGE_BUFFER)
4351 *buf_type = CIFS_LARGE_BUFFER;
4357 * Check the mid_state and signature on received buffer (if any), and queue the
4358 * workqueue completion task.
4361 smb2_writev_callback(struct mid_q_entry *mid)
4363 struct cifs_writedata *wdata = mid->callback_data;
4364 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
4365 struct TCP_Server_Info *server = wdata->server;
4366 unsigned int written;
4367 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
4368 struct cifs_credits credits = { .value = 0, .instance = 0 };
4370 WARN_ONCE(wdata->server != mid->server,
4371 "wdata server %p != mid server %p",
4372 wdata->server, mid->server);
4374 switch (mid->mid_state) {
4375 case MID_RESPONSE_RECEIVED:
4376 credits.value = le16_to_cpu(rsp->hdr.CreditRequest);
4377 credits.instance = server->reconnect_instance;
4378 wdata->result = smb2_check_receive(mid, server, 0);
4379 if (wdata->result != 0)
4382 written = le32_to_cpu(rsp->DataLength);
4384 * Mask off high 16 bits when bytes written as returned
4385 * by the server is greater than bytes requested by the
4386 * client. OS/2 servers are known to set incorrect
4389 if (written > wdata->bytes)
4392 if (written < wdata->bytes)
4393 wdata->result = -ENOSPC;
4395 wdata->bytes = written;
4397 case MID_REQUEST_SUBMITTED:
4398 case MID_RETRY_NEEDED:
4399 wdata->result = -EAGAIN;
4401 case MID_RESPONSE_MALFORMED:
4402 credits.value = le16_to_cpu(rsp->hdr.CreditRequest);
4403 credits.instance = server->reconnect_instance;
4406 wdata->result = -EIO;
4409 #ifdef CONFIG_CIFS_SMB_DIRECT
4411 * If this wdata has a memory registered, the MR can be freed
4412 * The number of MRs available is limited, it's important to recover
4413 * used MR as soon as I/O is finished. Hold MR longer in the later
4414 * I/O process can possibly result in I/O deadlock due to lack of MR
4415 * to send request on I/O retry
4418 smbd_deregister_mr(wdata->mr);
4422 if (wdata->result) {
4423 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
4424 trace_smb3_write_err(0 /* no xid */,
4425 wdata->cfile->fid.persistent_fid,
4426 tcon->tid, tcon->ses->Suid, wdata->offset,
4427 wdata->bytes, wdata->result);
4428 if (wdata->result == -ENOSPC)
4429 pr_warn_once("Out of space writing to %s\n",
4432 trace_smb3_write_done(0 /* no xid */,
4433 wdata->cfile->fid.persistent_fid,
4434 tcon->tid, tcon->ses->Suid,
4435 wdata->offset, wdata->bytes);
4437 queue_work(cifsiod_wq, &wdata->work);
4439 add_credits(server, &credits, 0);
4442 /* smb2_async_writev - send an async write, and set up mid to handle result */
4444 smb2_async_writev(struct cifs_writedata *wdata,
4445 void (*release)(struct kref *kref))
4447 int rc = -EACCES, flags = 0;
4448 struct smb2_write_req *req = NULL;
4449 struct smb2_hdr *shdr;
4450 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
4451 struct TCP_Server_Info *server = wdata->server;
4453 struct smb_rqst rqst = { };
4454 unsigned int total_len;
4457 server = wdata->server = cifs_pick_channel(tcon->ses);
4459 rc = smb2_plain_req_init(SMB2_WRITE, tcon, server,
4460 (void **) &req, &total_len);
4464 if (smb3_encryption_required(tcon))
4465 flags |= CIFS_TRANSFORM_REQ;
4467 shdr = (struct smb2_hdr *)req;
4468 shdr->Id.SyncId.ProcessId = cpu_to_le32(wdata->cfile->pid);
4470 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
4471 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
4472 req->WriteChannelInfoOffset = 0;
4473 req->WriteChannelInfoLength = 0;
4475 req->Offset = cpu_to_le64(wdata->offset);
4476 req->DataOffset = cpu_to_le16(
4477 offsetof(struct smb2_write_req, Buffer));
4478 req->RemainingBytes = 0;
4480 trace_smb3_write_enter(0 /* xid */, wdata->cfile->fid.persistent_fid,
4481 tcon->tid, tcon->ses->Suid, wdata->offset, wdata->bytes);
4482 #ifdef CONFIG_CIFS_SMB_DIRECT
4484 * If we want to do a server RDMA read, fill in and append
4485 * smbd_buffer_descriptor_v1 to the end of write request
4487 if (server->rdma && !server->sign && wdata->bytes >=
4488 server->smbd_conn->rdma_readwrite_threshold) {
4490 struct smbd_buffer_descriptor_v1 *v1;
4491 bool need_invalidate = server->dialect == SMB30_PROT_ID;
4493 wdata->mr = smbd_register_mr(
4494 server->smbd_conn, wdata->pages,
4495 wdata->nr_pages, wdata->page_offset,
4496 wdata->tailsz, false, need_invalidate);
4499 goto async_writev_out;
4502 req->DataOffset = 0;
4503 if (wdata->nr_pages > 1)
4504 req->RemainingBytes =
4506 (wdata->nr_pages - 1) * wdata->pagesz -
4507 wdata->page_offset + wdata->tailsz
4510 req->RemainingBytes = cpu_to_le32(wdata->tailsz);
4511 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
4512 if (need_invalidate)
4513 req->Channel = SMB2_CHANNEL_RDMA_V1;
4514 req->WriteChannelInfoOffset =
4515 cpu_to_le16(offsetof(struct smb2_write_req, Buffer));
4516 req->WriteChannelInfoLength =
4517 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
4518 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
4519 v1->offset = cpu_to_le64(wdata->mr->mr->iova);
4520 v1->token = cpu_to_le32(wdata->mr->mr->rkey);
4521 v1->length = cpu_to_le32(wdata->mr->mr->length);
4524 iov[0].iov_len = total_len - 1;
4525 iov[0].iov_base = (char *)req;
4529 rqst.rq_pages = wdata->pages;
4530 rqst.rq_offset = wdata->page_offset;
4531 rqst.rq_npages = wdata->nr_pages;
4532 rqst.rq_pagesz = wdata->pagesz;
4533 rqst.rq_tailsz = wdata->tailsz;
4534 #ifdef CONFIG_CIFS_SMB_DIRECT
4536 iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1);
4540 cifs_dbg(FYI, "async write at %llu %u bytes\n",
4541 wdata->offset, wdata->bytes);
4543 #ifdef CONFIG_CIFS_SMB_DIRECT
4544 /* For RDMA read, I/O size is in RemainingBytes not in Length */
4546 req->Length = cpu_to_le32(wdata->bytes);
4548 req->Length = cpu_to_le32(wdata->bytes);
4551 if (wdata->credits.value > 0) {
4552 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
4553 SMB2_MAX_BUFFER_SIZE));
4554 shdr->CreditRequest = cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 8);
4556 rc = adjust_credits(server, &wdata->credits, wdata->bytes);
4558 goto async_writev_out;
4560 flags |= CIFS_HAS_CREDITS;
4563 kref_get(&wdata->refcount);
4564 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
4565 wdata, flags, &wdata->credits);
4568 trace_smb3_write_err(0 /* no xid */,
4569 req->PersistentFileId,
4570 tcon->tid, tcon->ses->Suid, wdata->offset,
4572 kref_put(&wdata->refcount, release);
4573 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
4577 cifs_small_buf_release(req);
4582 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
4583 * The length field from io_parms must be at least 1 and indicates a number of
4584 * elements with data to write that begins with position 1 in iov array. All
4585 * data length is specified by count.
4588 SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
4589 unsigned int *nbytes, struct kvec *iov, int n_vec)
4591 struct smb_rqst rqst;
4593 struct smb2_write_req *req = NULL;
4594 struct smb2_write_rsp *rsp = NULL;
4596 struct kvec rsp_iov;
4598 unsigned int total_len;
4599 struct TCP_Server_Info *server;
4606 if (!io_parms->server)
4607 io_parms->server = cifs_pick_channel(io_parms->tcon->ses);
4608 server = io_parms->server;
4610 return -ECONNABORTED;
4612 rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, server,
4613 (void **) &req, &total_len);
4617 if (smb3_encryption_required(io_parms->tcon))
4618 flags |= CIFS_TRANSFORM_REQ;
4620 req->hdr.Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid);
4622 req->PersistentFileId = io_parms->persistent_fid;
4623 req->VolatileFileId = io_parms->volatile_fid;
4624 req->WriteChannelInfoOffset = 0;
4625 req->WriteChannelInfoLength = 0;
4627 req->Length = cpu_to_le32(io_parms->length);
4628 req->Offset = cpu_to_le64(io_parms->offset);
4629 req->DataOffset = cpu_to_le16(
4630 offsetof(struct smb2_write_req, Buffer));
4631 req->RemainingBytes = 0;
4633 trace_smb3_write_enter(xid, io_parms->persistent_fid,
4634 io_parms->tcon->tid, io_parms->tcon->ses->Suid,
4635 io_parms->offset, io_parms->length);
4637 iov[0].iov_base = (char *)req;
4639 iov[0].iov_len = total_len - 1;
4641 memset(&rqst, 0, sizeof(struct smb_rqst));
4643 rqst.rq_nvec = n_vec + 1;
4645 rc = cifs_send_recv(xid, io_parms->tcon->ses, server,
4647 &resp_buftype, flags, &rsp_iov);
4648 rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
4651 trace_smb3_write_err(xid,
4652 req->PersistentFileId,
4653 io_parms->tcon->tid,
4654 io_parms->tcon->ses->Suid,
4655 io_parms->offset, io_parms->length, rc);
4656 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
4657 cifs_dbg(VFS, "Send error in write = %d\n", rc);
4659 *nbytes = le32_to_cpu(rsp->DataLength);
4660 trace_smb3_write_done(xid,
4661 req->PersistentFileId,
4662 io_parms->tcon->tid,
4663 io_parms->tcon->ses->Suid,
4664 io_parms->offset, *nbytes);
4667 cifs_small_buf_release(req);
4668 free_rsp_buf(resp_buftype, rsp);
4672 int posix_info_sid_size(const void *beg, const void *end)
4680 subauth = *(u8 *)(beg+1);
4681 if (subauth < 1 || subauth > 15)
4684 total = 1 + 1 + 6 + 4*subauth;
4685 if (beg + total > end)
4691 int posix_info_parse(const void *beg, const void *end,
4692 struct smb2_posix_info_parsed *out)
4696 int owner_len, group_len;
4698 const void *owner_sid;
4699 const void *group_sid;
4702 /* if no end bound given, assume payload to be correct */
4704 const struct smb2_posix_info *p = beg;
4706 end = beg + le32_to_cpu(p->NextEntryOffset);
4707 /* last element will have a 0 offset, pick a sensible bound */
4712 /* check base buf */
4713 if (beg + sizeof(struct smb2_posix_info) > end)
4715 total_len = sizeof(struct smb2_posix_info);
4717 /* check owner sid */
4718 owner_sid = beg + total_len;
4719 owner_len = posix_info_sid_size(owner_sid, end);
4722 total_len += owner_len;
4724 /* check group sid */
4725 group_sid = beg + total_len;
4726 group_len = posix_info_sid_size(group_sid, end);
4729 total_len += group_len;
4731 /* check name len */
4732 if (beg + total_len + 4 > end)
4734 name_len = le32_to_cpu(*(__le32 *)(beg + total_len));
4735 if (name_len < 1 || name_len > 0xFFFF)
4740 name = beg + total_len;
4741 if (name + name_len > end)
4743 total_len += name_len;
4747 out->size = total_len;
4748 out->name_len = name_len;
4750 memcpy(&out->owner, owner_sid, owner_len);
4751 memcpy(&out->group, group_sid, group_len);
4756 static int posix_info_extra_size(const void *beg, const void *end)
4758 int len = posix_info_parse(beg, end, NULL);
4762 return len - sizeof(struct smb2_posix_info);
4766 num_entries(int infotype, char *bufstart, char *end_of_buf, char **lastentry,
4770 unsigned int entrycount = 0;
4771 unsigned int next_offset = 0;
4773 FILE_DIRECTORY_INFO *dir_info;
4775 if (bufstart == NULL)
4778 entryptr = bufstart;
4781 if (entryptr + next_offset < entryptr ||
4782 entryptr + next_offset > end_of_buf ||
4783 entryptr + next_offset + size > end_of_buf) {
4784 cifs_dbg(VFS, "malformed search entry would overflow\n");
4788 entryptr = entryptr + next_offset;
4789 dir_info = (FILE_DIRECTORY_INFO *)entryptr;
4791 if (infotype == SMB_FIND_FILE_POSIX_INFO)
4792 len = posix_info_extra_size(entryptr, end_of_buf);
4794 len = le32_to_cpu(dir_info->FileNameLength);
4797 entryptr + len < entryptr ||
4798 entryptr + len > end_of_buf ||
4799 entryptr + len + size > end_of_buf) {
4800 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
4805 *lastentry = entryptr;
4808 next_offset = le32_to_cpu(dir_info->NextEntryOffset);
4819 int SMB2_query_directory_init(const unsigned int xid,
4820 struct cifs_tcon *tcon,
4821 struct TCP_Server_Info *server,
4822 struct smb_rqst *rqst,
4823 u64 persistent_fid, u64 volatile_fid,
4824 int index, int info_level)
4826 struct smb2_query_directory_req *req;
4827 unsigned char *bufptr;
4828 __le16 asteriks = cpu_to_le16('*');
4829 unsigned int output_size = CIFSMaxBufSize -
4830 MAX_SMB2_CREATE_RESPONSE_SIZE -
4831 MAX_SMB2_CLOSE_RESPONSE_SIZE;
4832 unsigned int total_len;
4833 struct kvec *iov = rqst->rq_iov;
4836 rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, server,
4837 (void **) &req, &total_len);
4841 switch (info_level) {
4842 case SMB_FIND_FILE_DIRECTORY_INFO:
4843 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
4845 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
4846 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
4848 case SMB_FIND_FILE_POSIX_INFO:
4849 req->FileInformationClass = SMB_FIND_FILE_POSIX_INFO;
4852 cifs_tcon_dbg(VFS, "info level %u isn't supported\n",
4857 req->FileIndex = cpu_to_le32(index);
4858 req->PersistentFileId = persistent_fid;
4859 req->VolatileFileId = volatile_fid;
4862 bufptr = req->Buffer;
4863 memcpy(bufptr, &asteriks, len);
4865 req->FileNameOffset =
4866 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1);
4867 req->FileNameLength = cpu_to_le16(len);
4869 * BB could be 30 bytes or so longer if we used SMB2 specific
4870 * buffer lengths, but this is safe and close enough.
4872 output_size = min_t(unsigned int, output_size, server->maxBuf);
4873 output_size = min_t(unsigned int, output_size, 2 << 15);
4874 req->OutputBufferLength = cpu_to_le32(output_size);
4876 iov[0].iov_base = (char *)req;
4878 iov[0].iov_len = total_len - 1;
4880 iov[1].iov_base = (char *)(req->Buffer);
4881 iov[1].iov_len = len;
4883 trace_smb3_query_dir_enter(xid, persistent_fid, tcon->tid,
4884 tcon->ses->Suid, index, output_size);
4889 void SMB2_query_directory_free(struct smb_rqst *rqst)
4891 if (rqst && rqst->rq_iov) {
4892 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
4897 smb2_parse_query_directory(struct cifs_tcon *tcon,
4898 struct kvec *rsp_iov,
4900 struct cifs_search_info *srch_inf)
4902 struct smb2_query_directory_rsp *rsp;
4903 size_t info_buf_size;
4907 rsp = (struct smb2_query_directory_rsp *)rsp_iov->iov_base;
4909 switch (srch_inf->info_level) {
4910 case SMB_FIND_FILE_DIRECTORY_INFO:
4911 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
4913 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
4914 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
4916 case SMB_FIND_FILE_POSIX_INFO:
4917 /* note that posix payload are variable size */
4918 info_buf_size = sizeof(struct smb2_posix_info);
4921 cifs_tcon_dbg(VFS, "info level %u isn't supported\n",
4922 srch_inf->info_level);
4926 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
4927 le32_to_cpu(rsp->OutputBufferLength), rsp_iov,
4930 cifs_tcon_dbg(VFS, "bad info payload");
4934 srch_inf->unicode = true;
4936 if (srch_inf->ntwrk_buf_start) {
4937 if (srch_inf->smallBuf)
4938 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
4940 cifs_buf_release(srch_inf->ntwrk_buf_start);
4942 srch_inf->ntwrk_buf_start = (char *)rsp;
4943 srch_inf->srch_entries_start = srch_inf->last_entry =
4944 (char *)rsp + le16_to_cpu(rsp->OutputBufferOffset);
4945 end_of_smb = rsp_iov->iov_len + (char *)rsp;
4947 srch_inf->entries_in_buffer = num_entries(
4948 srch_inf->info_level,
4949 srch_inf->srch_entries_start,
4951 &srch_inf->last_entry,
4954 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
4955 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
4956 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
4957 srch_inf->srch_entries_start, srch_inf->last_entry);
4958 if (resp_buftype == CIFS_LARGE_BUFFER)
4959 srch_inf->smallBuf = false;
4960 else if (resp_buftype == CIFS_SMALL_BUFFER)
4961 srch_inf->smallBuf = true;
4963 cifs_tcon_dbg(VFS, "Invalid search buffer type\n");
4969 SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
4970 u64 persistent_fid, u64 volatile_fid, int index,
4971 struct cifs_search_info *srch_inf)
4973 struct smb_rqst rqst;
4974 struct kvec iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
4975 struct smb2_query_directory_rsp *rsp = NULL;
4976 int resp_buftype = CIFS_NO_BUFFER;
4977 struct kvec rsp_iov;
4979 struct cifs_ses *ses = tcon->ses;
4980 struct TCP_Server_Info *server = cifs_pick_channel(ses);
4983 if (!ses || !(ses->server))
4986 if (smb3_encryption_required(tcon))
4987 flags |= CIFS_TRANSFORM_REQ;
4989 memset(&rqst, 0, sizeof(struct smb_rqst));
4990 memset(&iov, 0, sizeof(iov));
4992 rqst.rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
4994 rc = SMB2_query_directory_init(xid, tcon, server,
4995 &rqst, persistent_fid,
4996 volatile_fid, index,
4997 srch_inf->info_level);
5001 rc = cifs_send_recv(xid, ses, server,
5002 &rqst, &resp_buftype, flags, &rsp_iov);
5003 rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
5006 if (rc == -ENODATA &&
5007 rsp->hdr.Status == STATUS_NO_MORE_FILES) {
5008 trace_smb3_query_dir_done(xid, persistent_fid,
5009 tcon->tid, tcon->ses->Suid, index, 0);
5010 srch_inf->endOfSearch = true;
5013 trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
5014 tcon->ses->Suid, index, 0, rc);
5015 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
5020 rc = smb2_parse_query_directory(tcon, &rsp_iov, resp_buftype,
5023 trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
5024 tcon->ses->Suid, index, 0, rc);
5027 resp_buftype = CIFS_NO_BUFFER;
5029 trace_smb3_query_dir_done(xid, persistent_fid, tcon->tid,
5030 tcon->ses->Suid, index, srch_inf->entries_in_buffer);
5033 SMB2_query_directory_free(&rqst);
5034 free_rsp_buf(resp_buftype, rsp);
5039 SMB2_set_info_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
5040 struct smb_rqst *rqst,
5041 u64 persistent_fid, u64 volatile_fid, u32 pid,
5042 u8 info_class, u8 info_type, u32 additional_info,
5043 void **data, unsigned int *size)
5045 struct smb2_set_info_req *req;
5046 struct kvec *iov = rqst->rq_iov;
5047 unsigned int i, total_len;
5050 rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, server,
5051 (void **) &req, &total_len);
5055 req->hdr.Id.SyncId.ProcessId = cpu_to_le32(pid);
5056 req->InfoType = info_type;
5057 req->FileInfoClass = info_class;
5058 req->PersistentFileId = persistent_fid;
5059 req->VolatileFileId = volatile_fid;
5060 req->AdditionalInformation = cpu_to_le32(additional_info);
5063 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1);
5064 req->BufferLength = cpu_to_le32(*size);
5066 memcpy(req->Buffer, *data, *size);
5069 iov[0].iov_base = (char *)req;
5071 iov[0].iov_len = total_len - 1;
5073 for (i = 1; i < rqst->rq_nvec; i++) {
5074 le32_add_cpu(&req->BufferLength, size[i]);
5075 iov[i].iov_base = (char *)data[i];
5076 iov[i].iov_len = size[i];
5083 SMB2_set_info_free(struct smb_rqst *rqst)
5085 if (rqst && rqst->rq_iov)
5086 cifs_buf_release(rqst->rq_iov[0].iov_base); /* request */
5090 send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
5091 u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
5092 u8 info_type, u32 additional_info, unsigned int num,
5093 void **data, unsigned int *size)
5095 struct smb_rqst rqst;
5096 struct smb2_set_info_rsp *rsp = NULL;
5098 struct kvec rsp_iov;
5101 struct cifs_ses *ses = tcon->ses;
5102 struct TCP_Server_Info *server = cifs_pick_channel(ses);
5105 if (!ses || !server)
5111 if (smb3_encryption_required(tcon))
5112 flags |= CIFS_TRANSFORM_REQ;
5114 iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL);
5118 memset(&rqst, 0, sizeof(struct smb_rqst));
5122 rc = SMB2_set_info_init(tcon, server,
5123 &rqst, persistent_fid, volatile_fid, pid,
5124 info_class, info_type, additional_info,
5132 rc = cifs_send_recv(xid, ses, server,
5133 &rqst, &resp_buftype, flags,
5135 SMB2_set_info_free(&rqst);
5136 rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
5139 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
5140 trace_smb3_set_info_err(xid, persistent_fid, tcon->tid,
5141 ses->Suid, info_class, (__u32)info_type, rc);
5144 free_rsp_buf(resp_buftype, rsp);
5150 SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
5151 u64 volatile_fid, u32 pid, __le64 *eof)
5153 struct smb2_file_eof_info info;
5157 info.EndOfFile = *eof;
5160 size = sizeof(struct smb2_file_eof_info);
5162 trace_smb3_set_eof(xid, persistent_fid, tcon->tid, tcon->ses->Suid, le64_to_cpu(*eof));
5164 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
5165 pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE,
5166 0, 1, &data, &size);
5170 SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
5171 u64 persistent_fid, u64 volatile_fid,
5172 struct cifs_ntsd *pnntsd, int pacllen, int aclflag)
5174 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
5175 current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag,
5176 1, (void **)&pnntsd, &pacllen);
5180 SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
5181 u64 persistent_fid, u64 volatile_fid,
5182 struct smb2_file_full_ea_info *buf, int len)
5184 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
5185 current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE,
5186 0, 1, (void **)&buf, &len);
5190 SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
5191 const u64 persistent_fid, const u64 volatile_fid,
5194 struct smb_rqst rqst;
5196 struct smb2_oplock_break *req = NULL;
5197 struct cifs_ses *ses = tcon->ses;
5198 struct TCP_Server_Info *server = cifs_pick_channel(ses);
5199 int flags = CIFS_OBREAK_OP;
5200 unsigned int total_len;
5202 struct kvec rsp_iov;
5205 cifs_dbg(FYI, "SMB2_oplock_break\n");
5206 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, server,
5207 (void **) &req, &total_len);
5211 if (smb3_encryption_required(tcon))
5212 flags |= CIFS_TRANSFORM_REQ;
5214 req->VolatileFid = volatile_fid;
5215 req->PersistentFid = persistent_fid;
5216 req->OplockLevel = oplock_level;
5217 req->hdr.CreditRequest = cpu_to_le16(1);
5219 flags |= CIFS_NO_RSP_BUF;
5221 iov[0].iov_base = (char *)req;
5222 iov[0].iov_len = total_len;
5224 memset(&rqst, 0, sizeof(struct smb_rqst));
5228 rc = cifs_send_recv(xid, ses, server,
5229 &rqst, &resp_buf_type, flags, &rsp_iov);
5230 cifs_small_buf_release(req);
5233 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
5234 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
5241 smb2_copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
5242 struct kstatfs *kst)
5244 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
5245 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
5246 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
5247 kst->f_bfree = kst->f_bavail =
5248 le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
5253 copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO *response_data,
5254 struct kstatfs *kst)
5256 kst->f_bsize = le32_to_cpu(response_data->BlockSize);
5257 kst->f_blocks = le64_to_cpu(response_data->TotalBlocks);
5258 kst->f_bfree = le64_to_cpu(response_data->BlocksAvail);
5259 if (response_data->UserBlocksAvail == cpu_to_le64(-1))
5260 kst->f_bavail = kst->f_bfree;
5262 kst->f_bavail = le64_to_cpu(response_data->UserBlocksAvail);
5263 if (response_data->TotalFileNodes != cpu_to_le64(-1))
5264 kst->f_files = le64_to_cpu(response_data->TotalFileNodes);
5265 if (response_data->FreeFileNodes != cpu_to_le64(-1))
5266 kst->f_ffree = le64_to_cpu(response_data->FreeFileNodes);
5272 build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon,
5273 struct TCP_Server_Info *server,
5274 int level, int outbuf_len, u64 persistent_fid,
5278 struct smb2_query_info_req *req;
5279 unsigned int total_len;
5281 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
5283 if ((tcon->ses == NULL) || server == NULL)
5286 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, server,
5287 (void **) &req, &total_len);
5291 req->InfoType = SMB2_O_INFO_FILESYSTEM;
5292 req->FileInfoClass = level;
5293 req->PersistentFileId = persistent_fid;
5294 req->VolatileFileId = volatile_fid;
5296 req->InputBufferOffset =
5297 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1);
5298 req->OutputBufferLength = cpu_to_le32(
5299 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1);
5301 iov->iov_base = (char *)req;
5302 iov->iov_len = total_len;
5307 SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon,
5308 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
5310 struct smb_rqst rqst;
5311 struct smb2_query_info_rsp *rsp = NULL;
5313 struct kvec rsp_iov;
5316 struct cifs_ses *ses = tcon->ses;
5317 struct TCP_Server_Info *server = cifs_pick_channel(ses);
5318 FILE_SYSTEM_POSIX_INFO *info = NULL;
5321 rc = build_qfs_info_req(&iov, tcon, server,
5322 FS_POSIX_INFORMATION,
5323 sizeof(FILE_SYSTEM_POSIX_INFO),
5324 persistent_fid, volatile_fid);
5328 if (smb3_encryption_required(tcon))
5329 flags |= CIFS_TRANSFORM_REQ;
5331 memset(&rqst, 0, sizeof(struct smb_rqst));
5335 rc = cifs_send_recv(xid, ses, server,
5336 &rqst, &resp_buftype, flags, &rsp_iov);
5337 cifs_small_buf_release(iov.iov_base);
5339 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
5340 goto posix_qfsinf_exit;
5342 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
5344 info = (FILE_SYSTEM_POSIX_INFO *)(
5345 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
5346 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
5347 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
5348 sizeof(FILE_SYSTEM_POSIX_INFO));
5350 copy_posix_fs_info_to_kstatfs(info, fsdata);
5353 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
5358 SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
5359 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
5361 struct smb_rqst rqst;
5362 struct smb2_query_info_rsp *rsp = NULL;
5364 struct kvec rsp_iov;
5367 struct cifs_ses *ses = tcon->ses;
5368 struct TCP_Server_Info *server = cifs_pick_channel(ses);
5369 struct smb2_fs_full_size_info *info = NULL;
5372 rc = build_qfs_info_req(&iov, tcon, server,
5373 FS_FULL_SIZE_INFORMATION,
5374 sizeof(struct smb2_fs_full_size_info),
5375 persistent_fid, volatile_fid);
5379 if (smb3_encryption_required(tcon))
5380 flags |= CIFS_TRANSFORM_REQ;
5382 memset(&rqst, 0, sizeof(struct smb_rqst));
5386 rc = cifs_send_recv(xid, ses, server,
5387 &rqst, &resp_buftype, flags, &rsp_iov);
5388 cifs_small_buf_release(iov.iov_base);
5390 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
5393 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
5395 info = (struct smb2_fs_full_size_info *)(
5396 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
5397 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
5398 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
5399 sizeof(struct smb2_fs_full_size_info));
5401 smb2_copy_fs_info_to_kstatfs(info, fsdata);
5404 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
5409 SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
5410 u64 persistent_fid, u64 volatile_fid, int level)
5412 struct smb_rqst rqst;
5413 struct smb2_query_info_rsp *rsp = NULL;
5415 struct kvec rsp_iov;
5417 int resp_buftype, max_len, min_len;
5418 struct cifs_ses *ses = tcon->ses;
5419 struct TCP_Server_Info *server = cifs_pick_channel(ses);
5420 unsigned int rsp_len, offset;
5423 if (level == FS_DEVICE_INFORMATION) {
5424 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
5425 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
5426 } else if (level == FS_ATTRIBUTE_INFORMATION) {
5427 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
5428 min_len = MIN_FS_ATTR_INFO_SIZE;
5429 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
5430 max_len = sizeof(struct smb3_fs_ss_info);
5431 min_len = sizeof(struct smb3_fs_ss_info);
5432 } else if (level == FS_VOLUME_INFORMATION) {
5433 max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN;
5434 min_len = sizeof(struct smb3_fs_vol_info);
5436 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
5440 rc = build_qfs_info_req(&iov, tcon, server,
5442 persistent_fid, volatile_fid);
5446 if (smb3_encryption_required(tcon))
5447 flags |= CIFS_TRANSFORM_REQ;
5449 memset(&rqst, 0, sizeof(struct smb_rqst));
5453 rc = cifs_send_recv(xid, ses, server,
5454 &rqst, &resp_buftype, flags, &rsp_iov);
5455 cifs_small_buf_release(iov.iov_base);
5457 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
5460 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
5462 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
5463 offset = le16_to_cpu(rsp->OutputBufferOffset);
5464 rc = smb2_validate_iov(offset, rsp_len, &rsp_iov, min_len);
5468 if (level == FS_ATTRIBUTE_INFORMATION)
5469 memcpy(&tcon->fsAttrInfo, offset
5470 + (char *)rsp, min_t(unsigned int,
5472 else if (level == FS_DEVICE_INFORMATION)
5473 memcpy(&tcon->fsDevInfo, offset
5474 + (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO));
5475 else if (level == FS_SECTOR_SIZE_INFORMATION) {
5476 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
5477 (offset + (char *)rsp);
5478 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
5479 tcon->perf_sector_size =
5480 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
5481 } else if (level == FS_VOLUME_INFORMATION) {
5482 struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *)
5483 (offset + (char *)rsp);
5484 tcon->vol_serial_number = vol_info->VolumeSerialNumber;
5485 tcon->vol_create_time = vol_info->VolumeCreationTime;
5489 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
5494 smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
5495 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
5496 const __u32 num_lock, struct smb2_lock_element *buf)
5498 struct smb_rqst rqst;
5500 struct smb2_lock_req *req = NULL;
5502 struct kvec rsp_iov;
5505 int flags = CIFS_NO_RSP_BUF;
5506 unsigned int total_len;
5507 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
5509 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
5511 rc = smb2_plain_req_init(SMB2_LOCK, tcon, server,
5512 (void **) &req, &total_len);
5516 if (smb3_encryption_required(tcon))
5517 flags |= CIFS_TRANSFORM_REQ;
5519 req->hdr.Id.SyncId.ProcessId = cpu_to_le32(pid);
5520 req->LockCount = cpu_to_le16(num_lock);
5522 req->PersistentFileId = persist_fid;
5523 req->VolatileFileId = volatile_fid;
5525 count = num_lock * sizeof(struct smb2_lock_element);
5527 iov[0].iov_base = (char *)req;
5528 iov[0].iov_len = total_len - sizeof(struct smb2_lock_element);
5529 iov[1].iov_base = (char *)buf;
5530 iov[1].iov_len = count;
5532 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
5534 memset(&rqst, 0, sizeof(struct smb_rqst));
5538 rc = cifs_send_recv(xid, tcon->ses, server,
5539 &rqst, &resp_buf_type, flags,
5541 cifs_small_buf_release(req);
5543 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
5544 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
5545 trace_smb3_lock_err(xid, persist_fid, tcon->tid,
5546 tcon->ses->Suid, rc);
5553 SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
5554 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
5555 const __u64 length, const __u64 offset, const __u32 lock_flags,
5558 struct smb2_lock_element lock;
5560 lock.Offset = cpu_to_le64(offset);
5561 lock.Length = cpu_to_le64(length);
5562 lock.Flags = cpu_to_le32(lock_flags);
5563 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
5564 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
5566 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
5570 SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
5571 __u8 *lease_key, const __le32 lease_state)
5573 struct smb_rqst rqst;
5575 struct smb2_lease_ack *req = NULL;
5576 struct cifs_ses *ses = tcon->ses;
5577 int flags = CIFS_OBREAK_OP;
5578 unsigned int total_len;
5580 struct kvec rsp_iov;
5582 __u64 *please_key_high;
5583 __u64 *please_key_low;
5584 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
5586 cifs_dbg(FYI, "SMB2_lease_break\n");
5587 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, server,
5588 (void **) &req, &total_len);
5592 if (smb3_encryption_required(tcon))
5593 flags |= CIFS_TRANSFORM_REQ;
5595 req->hdr.CreditRequest = cpu_to_le16(1);
5596 req->StructureSize = cpu_to_le16(36);
5599 memcpy(req->LeaseKey, lease_key, 16);
5600 req->LeaseState = lease_state;
5602 flags |= CIFS_NO_RSP_BUF;
5604 iov[0].iov_base = (char *)req;
5605 iov[0].iov_len = total_len;
5607 memset(&rqst, 0, sizeof(struct smb_rqst));
5611 rc = cifs_send_recv(xid, ses, server,
5612 &rqst, &resp_buf_type, flags, &rsp_iov);
5613 cifs_small_buf_release(req);
5615 please_key_low = (__u64 *)lease_key;
5616 please_key_high = (__u64 *)(lease_key+8);
5618 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
5619 trace_smb3_lease_err(le32_to_cpu(lease_state), tcon->tid,
5620 ses->Suid, *please_key_low, *please_key_high, rc);
5621 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
5623 trace_smb3_lease_done(le32_to_cpu(lease_state), tcon->tid,
5624 ses->Suid, *please_key_low, *please_key_high);