4 * Copyright (C) International Business Machines Corp., 2009, 2013
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
9 * Contains the routines for constructing the SMB2 PDUs themselves
11 * This library is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published
13 * by the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
19 * the GNU Lesser General Public License for more details.
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
27 /* Note that there are handle based routines which must be */
28 /* treated slightly differently for reconnection purposes since we never */
29 /* want to reuse a stale file handle and only the caller knows the file info */
32 #include <linux/kernel.h>
33 #include <linux/vfs.h>
34 #include <linux/task_io_accounting_ops.h>
35 #include <linux/uaccess.h>
36 #include <linux/uuid.h>
37 #include <linux/pagemap.h>
38 #include <linux/xattr.h>
42 #include "cifsproto.h"
43 #include "smb2proto.h"
44 #include "cifs_unicode.h"
45 #include "cifs_debug.h"
47 #include "smb2status.h"
50 #include "cifs_spnego.h"
51 #include "smbdirect.h"
53 #ifdef CONFIG_CIFS_DFS_UPCALL
54 #include "dfs_cache.h"
58 * The following table defines the expected "StructureSize" of SMB2 requests
59 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
61 * Note that commands are defined in smb2pdu.h in le16 but the array below is
62 * indexed by command in host byte order.
64 static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
65 /* SMB2_NEGOTIATE */ 36,
66 /* SMB2_SESSION_SETUP */ 25,
68 /* SMB2_TREE_CONNECT */ 9,
69 /* SMB2_TREE_DISCONNECT */ 4,
79 /* SMB2_QUERY_DIRECTORY */ 33,
80 /* SMB2_CHANGE_NOTIFY */ 32,
81 /* SMB2_QUERY_INFO */ 41,
82 /* SMB2_SET_INFO */ 33,
83 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
86 int smb3_encryption_required(const struct cifs_tcon *tcon)
90 if ((tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
91 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
94 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
100 smb2_hdr_assemble(struct smb2_sync_hdr *shdr, __le16 smb2_cmd,
101 const struct cifs_tcon *tcon)
103 shdr->ProtocolId = SMB2_PROTO_NUMBER;
104 shdr->StructureSize = cpu_to_le16(64);
105 shdr->Command = smb2_cmd;
106 if (tcon && tcon->ses && tcon->ses->server) {
107 struct TCP_Server_Info *server = tcon->ses->server;
109 spin_lock(&server->req_lock);
110 /* Request up to 10 credits but don't go over the limit. */
111 if (server->credits >= server->max_credits)
112 shdr->CreditRequest = cpu_to_le16(0);
114 shdr->CreditRequest = cpu_to_le16(
115 min_t(int, server->max_credits -
116 server->credits, 10));
117 spin_unlock(&server->req_lock);
119 shdr->CreditRequest = cpu_to_le16(2);
121 shdr->ProcessId = cpu_to_le32((__u16)current->tgid);
126 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
127 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
128 if ((tcon->ses) && (tcon->ses->server) &&
129 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
130 shdr->CreditCharge = cpu_to_le16(1);
131 /* else CreditCharge MBZ */
133 shdr->TreeId = tcon->tid;
134 /* Uid is not converted */
136 shdr->SessionId = tcon->ses->Suid;
139 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
140 * to pass the path on the Open SMB prefixed by \\server\share.
141 * Not sure when we would need to do the augmented path (if ever) and
142 * setting this flag breaks the SMB2 open operation since it is
143 * illegal to send an empty path name (without \\server\share prefix)
144 * when the DFS flag is set in the SMB open header. We could
145 * consider setting the flag on all operations other than open
146 * but it is safer to net set it for now.
148 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
149 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
151 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign &&
152 !smb3_encryption_required(tcon))
153 shdr->Flags |= SMB2_FLAGS_SIGNED;
158 #ifdef CONFIG_CIFS_DFS_UPCALL
159 static int __smb2_reconnect(const struct nls_table *nlsc,
160 struct cifs_tcon *tcon)
163 struct dfs_cache_tgt_list tl;
164 struct dfs_cache_tgt_iterator *it = NULL;
166 const char *tcp_host;
168 const char *dfs_host;
171 tree = kzalloc(MAX_TREE_SIZE, GFP_KERNEL);
176 scnprintf(tree, MAX_TREE_SIZE, "\\\\%s\\IPC$",
177 tcon->ses->server->hostname);
178 rc = SMB2_tcon(0, tcon->ses, tree, tcon, nlsc);
182 if (!tcon->dfs_path) {
183 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nlsc);
187 rc = dfs_cache_noreq_find(tcon->dfs_path + 1, NULL, &tl);
191 extract_unc_hostname(tcon->ses->server->hostname, &tcp_host,
194 for (it = dfs_cache_get_tgt_iterator(&tl); it;
195 it = dfs_cache_get_next_tgt(&tl, it)) {
196 const char *tgt = dfs_cache_get_tgt_name(it);
198 extract_unc_hostname(tgt, &dfs_host, &dfs_host_len);
200 if (dfs_host_len != tcp_host_len
201 || strncasecmp(dfs_host, tcp_host, dfs_host_len) != 0) {
202 cifs_dbg(FYI, "%s: skipping %.*s, doesn't match %.*s",
204 (int)dfs_host_len, dfs_host,
205 (int)tcp_host_len, tcp_host);
209 scnprintf(tree, MAX_TREE_SIZE, "\\%s", tgt);
211 rc = SMB2_tcon(0, tcon->ses, tree, tcon, nlsc);
220 rc = dfs_cache_noreq_update_tgthint(tcon->dfs_path + 1,
225 dfs_cache_free_tgts(&tl);
231 static inline int __smb2_reconnect(const struct nls_table *nlsc,
232 struct cifs_tcon *tcon)
234 return SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nlsc);
239 smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
242 struct nls_table *nls_codepage;
243 struct cifs_ses *ses;
244 struct TCP_Server_Info *server;
248 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
249 * check for tcp and smb session status done differently
250 * for those three - in the calling routine.
255 if (smb2_command == SMB2_TREE_CONNECT || smb2_command == SMB2_IOCTL)
258 if (tcon->tidStatus == CifsExiting) {
260 * only tree disconnect, open, and write,
261 * (and ulogoff which does not have tcon)
262 * are allowed as we start force umount.
264 if ((smb2_command != SMB2_WRITE) &&
265 (smb2_command != SMB2_CREATE) &&
266 (smb2_command != SMB2_TREE_DISCONNECT)) {
267 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
272 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
273 (!tcon->ses->server))
277 server = ses->server;
279 retries = server->nr_targets;
282 * Give demultiplex thread up to 10 seconds to each target available for
283 * reconnect -- should be greater than cifs socket timeout which is 7
286 while (server->tcpStatus == CifsNeedReconnect) {
288 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
289 * here since they are implicitly done when session drops.
291 switch (smb2_command) {
293 * BB Should we keep oplock break and add flush to exceptions?
295 case SMB2_TREE_DISCONNECT:
298 case SMB2_OPLOCK_BREAK:
302 rc = wait_event_interruptible_timeout(server->response_q,
303 (server->tcpStatus != CifsNeedReconnect),
306 cifs_dbg(FYI, "%s: aborting reconnect due to a received"
307 " signal by the process\n", __func__);
311 /* are we still trying to reconnect? */
312 if (server->tcpStatus != CifsNeedReconnect)
319 * on "soft" mounts we wait once. Hard mounts keep
320 * retrying until process is killed or server comes
324 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
327 retries = server->nr_targets;
330 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
333 nls_codepage = load_nls_default();
336 * need to prevent multiple threads trying to simultaneously reconnect
337 * the same SMB session
339 mutex_lock(&tcon->ses->session_mutex);
342 * Recheck after acquire mutex. If another thread is negotiating
343 * and the server never sends an answer the socket will be closed
344 * and tcpStatus set to reconnect.
346 if (server->tcpStatus == CifsNeedReconnect) {
348 mutex_unlock(&tcon->ses->session_mutex);
352 rc = cifs_negotiate_protocol(0, tcon->ses);
353 if (!rc && tcon->ses->need_reconnect)
354 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
356 if (rc || !tcon->need_reconnect) {
357 mutex_unlock(&tcon->ses->session_mutex);
361 cifs_mark_open_files_invalid(tcon);
362 if (tcon->use_persistent)
363 tcon->need_reopen_files = true;
365 rc = __smb2_reconnect(nls_codepage, tcon);
366 mutex_unlock(&tcon->ses->session_mutex);
368 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
370 /* If sess reconnected but tcon didn't, something strange ... */
371 printk_once(KERN_WARNING "reconnect tcon failed rc = %d\n", rc);
375 if (smb2_command != SMB2_INTERNAL_CMD)
376 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
378 atomic_inc(&tconInfoReconnectCount);
381 * Check if handle based operation so we know whether we can continue
382 * or not without returning to caller to reset file handle.
385 * BB Is flush done by server on drop of tcp session? Should we special
386 * case it and skip above?
388 switch (smb2_command) {
394 case SMB2_QUERY_DIRECTORY:
395 case SMB2_CHANGE_NOTIFY:
396 case SMB2_QUERY_INFO:
400 unload_nls(nls_codepage);
405 fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, void *buf,
406 unsigned int *total_len)
408 struct smb2_sync_pdu *spdu = (struct smb2_sync_pdu *)buf;
409 /* lookup word count ie StructureSize from table */
410 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)];
413 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
414 * largest operations (Create)
418 smb2_hdr_assemble(&spdu->sync_hdr, smb2_command, tcon);
419 spdu->StructureSize2 = cpu_to_le16(parmsize);
421 *total_len = parmsize + sizeof(struct smb2_sync_hdr);
425 * Allocate and return pointer to an SMB request hdr, and set basic
426 * SMB information in the SMB header. If the return code is zero, this
427 * function must have filled in request_buf pointer.
430 smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
431 void **request_buf, unsigned int *total_len)
435 rc = smb2_reconnect(smb2_command, tcon);
439 /* BB eventually switch this to SMB2 specific small buf size */
440 if (smb2_command == SMB2_SET_INFO)
441 *request_buf = cifs_buf_get();
443 *request_buf = cifs_small_buf_get();
444 if (*request_buf == NULL) {
445 /* BB should we add a retry in here if not a writepage? */
449 fill_small_buf(smb2_command, tcon,
450 (struct smb2_sync_hdr *)(*request_buf),
454 uint16_t com_code = le16_to_cpu(smb2_command);
455 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
456 cifs_stats_inc(&tcon->num_smbs_sent);
462 /* For explanation of negotiate contexts see MS-SMB2 section 2.2.3.1 */
465 build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
467 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
468 pneg_ctxt->DataLength = cpu_to_le16(38);
469 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
470 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
471 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
472 pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
476 build_compression_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt)
478 pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES;
479 pneg_ctxt->DataLength =
480 cpu_to_le16(sizeof(struct smb2_compression_capabilities_context)
481 - sizeof(struct smb2_neg_context));
482 pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(3);
483 pneg_ctxt->CompressionAlgorithms[0] = SMB3_COMPRESS_LZ77;
484 pneg_ctxt->CompressionAlgorithms[1] = SMB3_COMPRESS_LZ77_HUFF;
485 pneg_ctxt->CompressionAlgorithms[2] = SMB3_COMPRESS_LZNT1;
489 build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
491 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
492 pneg_ctxt->DataLength = cpu_to_le16(6); /* Cipher Count + two ciphers */
493 pneg_ctxt->CipherCount = cpu_to_le16(2);
494 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
495 pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM;
499 build_netname_ctxt(struct smb2_netname_neg_context *pneg_ctxt, char *hostname)
501 struct nls_table *cp = load_nls_default();
503 pneg_ctxt->ContextType = SMB2_NETNAME_NEGOTIATE_CONTEXT_ID;
505 /* copy up to max of first 100 bytes of server name to NetName field */
506 pneg_ctxt->DataLength = cpu_to_le16(2 * cifs_strtoUTF16(pneg_ctxt->NetName, hostname, 100, cp));
507 /* context size is DataLength + minimal smb2_neg_context */
508 return DIV_ROUND_UP(le16_to_cpu(pneg_ctxt->DataLength) +
509 sizeof(struct smb2_neg_context), 8) * 8;
513 build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
515 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
516 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
517 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
518 pneg_ctxt->Name[0] = 0x93;
519 pneg_ctxt->Name[1] = 0xAD;
520 pneg_ctxt->Name[2] = 0x25;
521 pneg_ctxt->Name[3] = 0x50;
522 pneg_ctxt->Name[4] = 0x9C;
523 pneg_ctxt->Name[5] = 0xB4;
524 pneg_ctxt->Name[6] = 0x11;
525 pneg_ctxt->Name[7] = 0xE7;
526 pneg_ctxt->Name[8] = 0xB4;
527 pneg_ctxt->Name[9] = 0x23;
528 pneg_ctxt->Name[10] = 0x83;
529 pneg_ctxt->Name[11] = 0xDE;
530 pneg_ctxt->Name[12] = 0x96;
531 pneg_ctxt->Name[13] = 0x8B;
532 pneg_ctxt->Name[14] = 0xCD;
533 pneg_ctxt->Name[15] = 0x7C;
537 assemble_neg_contexts(struct smb2_negotiate_req *req,
538 struct TCP_Server_Info *server, unsigned int *total_len)
540 char *pneg_ctxt = (char *)req;
541 unsigned int ctxt_len;
543 if (*total_len > 200) {
544 /* In case length corrupted don't want to overrun smb buffer */
545 cifs_server_dbg(VFS, "Bad frame length assembling neg contexts\n");
550 * round up total_len of fixed part of SMB3 negotiate request to 8
551 * byte boundary before adding negotiate contexts
553 *total_len = roundup(*total_len, 8);
555 pneg_ctxt = (*total_len) + (char *)req;
556 req->NegotiateContextOffset = cpu_to_le32(*total_len);
558 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
559 ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_preauth_neg_context), 8) * 8;
560 *total_len += ctxt_len;
561 pneg_ctxt += ctxt_len;
563 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
564 ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_encryption_neg_context), 8) * 8;
565 *total_len += ctxt_len;
566 pneg_ctxt += ctxt_len;
568 if (server->compress_algorithm) {
569 build_compression_ctxt((struct smb2_compression_capabilities_context *)
571 ctxt_len = DIV_ROUND_UP(
572 sizeof(struct smb2_compression_capabilities_context),
574 *total_len += ctxt_len;
575 pneg_ctxt += ctxt_len;
576 req->NegotiateContextCount = cpu_to_le16(5);
578 req->NegotiateContextCount = cpu_to_le16(4);
580 ctxt_len = build_netname_ctxt((struct smb2_netname_neg_context *)pneg_ctxt,
582 *total_len += ctxt_len;
583 pneg_ctxt += ctxt_len;
585 build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
586 *total_len += sizeof(struct smb2_posix_neg_context);
589 static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt)
591 unsigned int len = le16_to_cpu(ctxt->DataLength);
593 /* If invalid preauth context warn but use what we requested, SHA-512 */
594 if (len < MIN_PREAUTH_CTXT_DATA_LEN) {
595 printk_once(KERN_WARNING "server sent bad preauth context\n");
598 if (le16_to_cpu(ctxt->HashAlgorithmCount) != 1)
599 printk_once(KERN_WARNING "illegal SMB3 hash algorithm count\n");
600 if (ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
601 printk_once(KERN_WARNING "unknown SMB3 hash algorithm\n");
604 static void decode_compress_ctx(struct TCP_Server_Info *server,
605 struct smb2_compression_capabilities_context *ctxt)
607 unsigned int len = le16_to_cpu(ctxt->DataLength);
609 /* sizeof compress context is a one element compression capbility struct */
611 printk_once(KERN_WARNING "server sent bad compression cntxt\n");
614 if (le16_to_cpu(ctxt->CompressionAlgorithmCount) != 1) {
615 printk_once(KERN_WARNING "illegal SMB3 compress algorithm count\n");
618 if (le16_to_cpu(ctxt->CompressionAlgorithms[0]) > 3) {
619 printk_once(KERN_WARNING "unknown compression algorithm\n");
622 server->compress_algorithm = ctxt->CompressionAlgorithms[0];
625 static int decode_encrypt_ctx(struct TCP_Server_Info *server,
626 struct smb2_encryption_neg_context *ctxt)
628 unsigned int len = le16_to_cpu(ctxt->DataLength);
630 cifs_dbg(FYI, "decode SMB3.11 encryption neg context of len %d\n", len);
631 if (len < MIN_ENCRYPT_CTXT_DATA_LEN) {
632 printk_once(KERN_WARNING "server sent bad crypto ctxt len\n");
636 if (le16_to_cpu(ctxt->CipherCount) != 1) {
637 printk_once(KERN_WARNING "illegal SMB3.11 cipher count\n");
640 cifs_dbg(FYI, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt->Ciphers[0]));
641 if ((ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_CCM) &&
642 (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_GCM)) {
643 printk_once(KERN_WARNING "invalid SMB3.11 cipher returned\n");
646 server->cipher_type = ctxt->Ciphers[0];
647 server->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
651 static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp,
652 struct TCP_Server_Info *server,
653 unsigned int len_of_smb)
655 struct smb2_neg_context *pctx;
656 unsigned int offset = le32_to_cpu(rsp->NegotiateContextOffset);
657 unsigned int ctxt_cnt = le16_to_cpu(rsp->NegotiateContextCount);
658 unsigned int len_of_ctxts, i;
661 cifs_dbg(FYI, "decoding %d negotiate contexts\n", ctxt_cnt);
662 if (len_of_smb <= offset) {
663 cifs_server_dbg(VFS, "Invalid response: negotiate context offset\n");
667 len_of_ctxts = len_of_smb - offset;
669 for (i = 0; i < ctxt_cnt; i++) {
671 /* check that offset is not beyond end of SMB */
672 if (len_of_ctxts == 0)
675 if (len_of_ctxts < sizeof(struct smb2_neg_context))
678 pctx = (struct smb2_neg_context *)(offset + (char *)rsp);
679 clen = le16_to_cpu(pctx->DataLength);
680 if (clen > len_of_ctxts)
683 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES)
684 decode_preauth_context(
685 (struct smb2_preauth_neg_context *)pctx);
686 else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES)
687 rc = decode_encrypt_ctx(server,
688 (struct smb2_encryption_neg_context *)pctx);
689 else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES)
690 decode_compress_ctx(server,
691 (struct smb2_compression_capabilities_context *)pctx);
692 else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE)
693 server->posix_ext_supported = true;
695 cifs_server_dbg(VFS, "unknown negcontext of type %d ignored\n",
696 le16_to_cpu(pctx->ContextType));
700 /* offsets must be 8 byte aligned */
701 clen = (clen + 7) & ~0x7;
702 offset += clen + sizeof(struct smb2_neg_context);
703 len_of_ctxts -= clen;
708 static struct create_posix *
709 create_posix_buf(umode_t mode)
711 struct create_posix *buf;
713 buf = kzalloc(sizeof(struct create_posix),
718 buf->ccontext.DataOffset =
719 cpu_to_le16(offsetof(struct create_posix, Mode));
720 buf->ccontext.DataLength = cpu_to_le32(4);
721 buf->ccontext.NameOffset =
722 cpu_to_le16(offsetof(struct create_posix, Name));
723 buf->ccontext.NameLength = cpu_to_le16(16);
725 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
736 buf->Name[10] = 0x83;
737 buf->Name[11] = 0xDE;
738 buf->Name[12] = 0x96;
739 buf->Name[13] = 0x8B;
740 buf->Name[14] = 0xCD;
741 buf->Name[15] = 0x7C;
742 buf->Mode = cpu_to_le32(mode);
743 cifs_dbg(FYI, "mode on posix create 0%o", mode);
748 add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode)
750 struct smb2_create_req *req = iov[0].iov_base;
751 unsigned int num = *num_iovec;
753 iov[num].iov_base = create_posix_buf(mode);
754 if (iov[num].iov_base == NULL)
756 iov[num].iov_len = sizeof(struct create_posix);
757 if (!req->CreateContextsOffset)
758 req->CreateContextsOffset = cpu_to_le32(
759 sizeof(struct smb2_create_req) +
760 iov[num - 1].iov_len);
761 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_posix));
762 *num_iovec = num + 1;
769 * SMB2 Worker functions follow:
771 * The general structure of the worker functions is:
772 * 1) Call smb2_init (assembles SMB2 header)
773 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
774 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
775 * 4) Decode SMB2 command specific fields in the fixed length area
776 * 5) Decode variable length data area (if any for this SMB2 command type)
777 * 6) Call free smb buffer
783 SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
785 struct smb_rqst rqst;
786 struct smb2_negotiate_req *req;
787 struct smb2_negotiate_rsp *rsp;
792 struct TCP_Server_Info *server = ses->server;
793 int blob_offset, blob_length;
795 int flags = CIFS_NEG_OP;
796 unsigned int total_len;
798 cifs_dbg(FYI, "Negotiate protocol\n");
801 WARN(1, "%s: server is NULL!\n", __func__);
805 rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, (void **) &req, &total_len);
809 req->sync_hdr.SessionId = 0;
811 memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
812 memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
814 if (strcmp(ses->server->vals->version_string,
815 SMB3ANY_VERSION_STRING) == 0) {
816 req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
817 req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
818 req->DialectCount = cpu_to_le16(2);
820 } else if (strcmp(server->vals->version_string,
821 SMBDEFAULT_VERSION_STRING) == 0) {
822 req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
823 req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
824 req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
825 req->Dialects[3] = cpu_to_le16(SMB311_PROT_ID);
826 req->DialectCount = cpu_to_le16(4);
829 /* otherwise send specific dialect */
830 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
831 req->DialectCount = cpu_to_le16(1);
835 /* only one of SMB2 signing flags may be set in SMB2 request */
837 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
838 else if (global_secflags & CIFSSEC_MAY_SIGN)
839 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
841 req->SecurityMode = 0;
843 req->Capabilities = cpu_to_le32(server->vals->req_capabilities);
845 /* ClientGUID must be zero for SMB2.02 dialect */
846 if (server->vals->protocol_id == SMB20_PROT_ID)
847 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
849 memcpy(req->ClientGUID, server->client_guid,
850 SMB2_CLIENT_GUID_SIZE);
851 if ((server->vals->protocol_id == SMB311_PROT_ID) ||
852 (strcmp(server->vals->version_string,
853 SMBDEFAULT_VERSION_STRING) == 0))
854 assemble_neg_contexts(req, server, &total_len);
856 iov[0].iov_base = (char *)req;
857 iov[0].iov_len = total_len;
859 memset(&rqst, 0, sizeof(struct smb_rqst));
863 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
864 cifs_small_buf_release(req);
865 rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base;
867 * No tcon so can't do
868 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
870 if (rc == -EOPNOTSUPP) {
871 cifs_server_dbg(VFS, "Dialect not supported by server. Consider "
872 "specifying vers=1.0 or vers=2.0 on mount for accessing"
878 if (strcmp(server->vals->version_string,
879 SMB3ANY_VERSION_STRING) == 0) {
880 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
882 "SMB2 dialect returned but not requested\n");
884 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
886 "SMB2.1 dialect returned but not requested\n");
889 } else if (strcmp(server->vals->version_string,
890 SMBDEFAULT_VERSION_STRING) == 0) {
891 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
893 "SMB2 dialect returned but not requested\n");
895 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
896 /* ops set to 3.0 by default for default so update */
897 server->ops = &smb21_operations;
898 server->vals = &smb21_values;
899 } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
900 server->ops = &smb311_operations;
901 server->vals = &smb311_values;
903 } else if (le16_to_cpu(rsp->DialectRevision) !=
904 server->vals->protocol_id) {
905 /* if requested single dialect ensure returned dialect matched */
906 cifs_server_dbg(VFS, "Illegal 0x%x dialect returned: not requested\n",
907 le16_to_cpu(rsp->DialectRevision));
911 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
913 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
914 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
915 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
916 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
917 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
918 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
919 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
920 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
921 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
922 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
924 cifs_server_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
925 le16_to_cpu(rsp->DialectRevision));
929 server->dialect = le16_to_cpu(rsp->DialectRevision);
932 * Keep a copy of the hash after negprot. This hash will be
933 * the starting hash value for all sessions made from this
936 memcpy(server->preauth_sha_hash, ses->preauth_sha_hash,
937 SMB2_PREAUTH_HASH_SIZE);
939 /* SMB2 only has an extended negflavor */
940 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
941 /* set it to the maximum buffer size value we can send with 1 credit */
942 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
943 SMB2_MAX_BUFFER_SIZE);
944 server->max_read = le32_to_cpu(rsp->MaxReadSize);
945 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
946 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
947 if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode)
948 cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n",
950 server->capabilities = le32_to_cpu(rsp->Capabilities);
952 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
954 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
955 (struct smb2_sync_hdr *)rsp);
957 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
959 * ses->sectype = RawNTLMSSP;
960 * but for time being this is our only auth choice so doesn't matter.
961 * We just found a server which sets blob length to zero expecting raw.
963 if (blob_length == 0) {
964 cifs_dbg(FYI, "missing security blob on negprot\n");
965 server->sec_ntlmssp = true;
968 rc = cifs_enable_signing(server, ses->sign);
972 rc = decode_negTokenInit(security_blob, blob_length, server);
979 if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
980 if (rsp->NegotiateContextCount)
981 rc = smb311_decode_neg_context(rsp, server,
984 cifs_server_dbg(VFS, "Missing expected negotiate contexts\n");
987 free_rsp_buf(resp_buftype, rsp);
991 int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
994 struct validate_negotiate_info_req *pneg_inbuf;
995 struct validate_negotiate_info_rsp *pneg_rsp = NULL;
997 u32 inbuflen; /* max of 4 dialects */
998 struct TCP_Server_Info *server = tcon->ses->server;
1000 cifs_dbg(FYI, "validate negotiate\n");
1002 /* In SMB3.11 preauth integrity supersedes validate negotiate */
1003 if (server->dialect == SMB311_PROT_ID)
1007 * validation ioctl must be signed, so no point sending this if we
1008 * can not sign it (ie are not known user). Even if signing is not
1009 * required (enabled but not negotiated), in those cases we selectively
1010 * sign just this, the first and only signed request on a connection.
1011 * Having validation of negotiate info helps reduce attack vectors.
1013 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
1014 return 0; /* validation requires signing */
1016 if (tcon->ses->user_name == NULL) {
1017 cifs_dbg(FYI, "Can't validate negotiate: null user mount\n");
1018 return 0; /* validation requires signing */
1021 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
1022 cifs_tcon_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n");
1024 pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS);
1028 pneg_inbuf->Capabilities =
1029 cpu_to_le32(server->vals->req_capabilities);
1030 memcpy(pneg_inbuf->Guid, server->client_guid,
1031 SMB2_CLIENT_GUID_SIZE);
1033 if (tcon->ses->sign)
1034 pneg_inbuf->SecurityMode =
1035 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
1036 else if (global_secflags & CIFSSEC_MAY_SIGN)
1037 pneg_inbuf->SecurityMode =
1038 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
1040 pneg_inbuf->SecurityMode = 0;
1043 if (strcmp(server->vals->version_string,
1044 SMB3ANY_VERSION_STRING) == 0) {
1045 pneg_inbuf->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
1046 pneg_inbuf->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
1047 pneg_inbuf->DialectCount = cpu_to_le16(2);
1048 /* structure is big enough for 3 dialects, sending only 2 */
1049 inbuflen = sizeof(*pneg_inbuf) -
1050 (2 * sizeof(pneg_inbuf->Dialects[0]));
1051 } else if (strcmp(server->vals->version_string,
1052 SMBDEFAULT_VERSION_STRING) == 0) {
1053 pneg_inbuf->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
1054 pneg_inbuf->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
1055 pneg_inbuf->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
1056 pneg_inbuf->Dialects[3] = cpu_to_le16(SMB311_PROT_ID);
1057 pneg_inbuf->DialectCount = cpu_to_le16(4);
1058 /* structure is big enough for 3 dialects */
1059 inbuflen = sizeof(*pneg_inbuf);
1061 /* otherwise specific dialect was requested */
1062 pneg_inbuf->Dialects[0] =
1063 cpu_to_le16(server->vals->protocol_id);
1064 pneg_inbuf->DialectCount = cpu_to_le16(1);
1065 /* structure is big enough for 3 dialects, sending only 1 */
1066 inbuflen = sizeof(*pneg_inbuf) -
1067 sizeof(pneg_inbuf->Dialects[0]) * 2;
1070 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1071 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
1072 (char *)pneg_inbuf, inbuflen, CIFSMaxBufSize,
1073 (char **)&pneg_rsp, &rsplen);
1074 if (rc == -EOPNOTSUPP) {
1076 * Old Windows versions or Netapp SMB server can return
1077 * not supported error. Client should accept it.
1079 cifs_tcon_dbg(VFS, "Server does not support validate negotiate\n");
1081 goto out_free_inbuf;
1082 } else if (rc != 0) {
1083 cifs_tcon_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
1085 goto out_free_inbuf;
1089 if (rsplen != sizeof(*pneg_rsp)) {
1090 cifs_tcon_dbg(VFS, "invalid protocol negotiate response size: %d\n",
1093 /* relax check since Mac returns max bufsize allowed on ioctl */
1094 if (rsplen > CIFSMaxBufSize || rsplen < sizeof(*pneg_rsp))
1098 /* check validate negotiate info response matches what we got earlier */
1099 if (pneg_rsp->Dialect != cpu_to_le16(server->dialect))
1102 if (pneg_rsp->SecurityMode != cpu_to_le16(server->sec_mode))
1105 /* do not validate server guid because not saved at negprot time yet */
1107 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
1108 SMB2_LARGE_FILES) != server->capabilities)
1111 /* validate negotiate successful */
1113 cifs_dbg(FYI, "validate negotiate info successful\n");
1117 cifs_tcon_dbg(VFS, "protocol revalidation - security settings mismatch\n");
1126 smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
1128 switch (requested) {
1135 if (server->sec_ntlmssp &&
1136 (global_secflags & CIFSSEC_MAY_NTLMSSP))
1138 if ((server->sec_kerberos || server->sec_mskerberos) &&
1139 (global_secflags & CIFSSEC_MAY_KRB5))
1147 struct SMB2_sess_data {
1149 struct cifs_ses *ses;
1150 struct nls_table *nls_cp;
1151 void (*func)(struct SMB2_sess_data *);
1153 u64 previous_session;
1155 /* we will send the SMB in three pieces:
1156 * a fixed length beginning part, an optional
1157 * SPNEGO blob (which can be zero length), and a
1158 * last part which will include the strings
1159 * and rest of bcc area. This allows us to avoid
1160 * a large buffer 17K allocation
1167 SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
1170 struct cifs_ses *ses = sess_data->ses;
1171 struct smb2_sess_setup_req *req;
1172 struct TCP_Server_Info *server = ses->server;
1173 unsigned int total_len;
1175 rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, (void **) &req,
1180 /* First session, not a reauthenticate */
1181 req->sync_hdr.SessionId = 0;
1183 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
1184 req->PreviousSessionId = sess_data->previous_session;
1186 req->Flags = 0; /* MBZ */
1188 /* enough to enable echos and oplocks and one max size write */
1189 req->sync_hdr.CreditRequest = cpu_to_le16(130);
1191 /* only one of SMB2 signing flags may be set in SMB2 request */
1193 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
1194 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
1195 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
1197 req->SecurityMode = 0;
1199 #ifdef CONFIG_CIFS_DFS_UPCALL
1200 req->Capabilities = cpu_to_le32(SMB2_GLOBAL_CAP_DFS);
1202 req->Capabilities = 0;
1203 #endif /* DFS_UPCALL */
1205 req->Channel = 0; /* MBZ */
1207 sess_data->iov[0].iov_base = (char *)req;
1209 sess_data->iov[0].iov_len = total_len - 1;
1211 * This variable will be used to clear the buffer
1212 * allocated above in case of any error in the calling function.
1214 sess_data->buf0_type = CIFS_SMALL_BUFFER;
1220 SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
1222 free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
1223 sess_data->buf0_type = CIFS_NO_BUFFER;
1227 SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
1230 struct smb_rqst rqst;
1231 struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
1232 struct kvec rsp_iov = { NULL, 0 };
1234 /* Testing shows that buffer offset must be at location of Buffer[0] */
1235 req->SecurityBufferOffset =
1236 cpu_to_le16(sizeof(struct smb2_sess_setup_req) - 1 /* pad */);
1237 req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
1239 memset(&rqst, 0, sizeof(struct smb_rqst));
1240 rqst.rq_iov = sess_data->iov;
1243 /* BB add code to build os and lm fields */
1244 rc = cifs_send_recv(sess_data->xid, sess_data->ses,
1246 &sess_data->buf0_type,
1247 CIFS_LOG_ERROR | CIFS_NEG_OP, &rsp_iov);
1248 cifs_small_buf_release(sess_data->iov[0].iov_base);
1249 memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
1255 SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
1258 struct cifs_ses *ses = sess_data->ses;
1260 mutex_lock(&ses->server->srv_mutex);
1261 if (ses->server->ops->generate_signingkey) {
1262 rc = ses->server->ops->generate_signingkey(ses);
1265 "SMB3 session key generation failed\n");
1266 mutex_unlock(&ses->server->srv_mutex);
1270 if (!ses->server->session_estab) {
1271 ses->server->sequence_number = 0x2;
1272 ses->server->session_estab = true;
1274 mutex_unlock(&ses->server->srv_mutex);
1276 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
1277 spin_lock(&GlobalMid_Lock);
1278 ses->status = CifsGood;
1279 ses->need_reconnect = false;
1280 spin_unlock(&GlobalMid_Lock);
1284 #ifdef CONFIG_CIFS_UPCALL
1286 SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1289 struct cifs_ses *ses = sess_data->ses;
1290 struct cifs_spnego_msg *msg;
1291 struct key *spnego_key = NULL;
1292 struct smb2_sess_setup_rsp *rsp = NULL;
1294 rc = SMB2_sess_alloc_buffer(sess_data);
1298 spnego_key = cifs_get_spnego_key(ses);
1299 if (IS_ERR(spnego_key)) {
1300 rc = PTR_ERR(spnego_key);
1305 msg = spnego_key->payload.data[0];
1307 * check version field to make sure that cifs.upcall is
1308 * sending us a response in an expected form
1310 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
1312 "bad cifs.upcall version. Expected %d got %d",
1313 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
1315 goto out_put_spnego_key;
1318 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
1320 if (!ses->auth_key.response) {
1322 "Kerberos can't allocate (%u bytes) memory",
1325 goto out_put_spnego_key;
1327 ses->auth_key.len = msg->sesskey_len;
1329 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
1330 sess_data->iov[1].iov_len = msg->secblob_len;
1332 rc = SMB2_sess_sendreceive(sess_data);
1334 goto out_put_spnego_key;
1336 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1337 ses->Suid = rsp->sync_hdr.SessionId;
1339 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
1341 rc = SMB2_sess_establish_session(sess_data);
1343 key_invalidate(spnego_key);
1344 key_put(spnego_key);
1346 sess_data->result = rc;
1347 sess_data->func = NULL;
1348 SMB2_sess_free_buffer(sess_data);
1352 SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1354 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
1355 sess_data->result = -EOPNOTSUPP;
1356 sess_data->func = NULL;
1361 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
1364 SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
1367 struct cifs_ses *ses = sess_data->ses;
1368 struct smb2_sess_setup_rsp *rsp = NULL;
1369 char *ntlmssp_blob = NULL;
1370 bool use_spnego = false; /* else use raw ntlmssp */
1371 u16 blob_length = 0;
1374 * If memory allocation is successful, caller of this function
1377 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
1378 if (!ses->ntlmssp) {
1382 ses->ntlmssp->sesskey_per_smbsess = true;
1384 rc = SMB2_sess_alloc_buffer(sess_data);
1388 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
1390 if (ntlmssp_blob == NULL) {
1395 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
1397 /* BB eventually need to add this */
1398 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1402 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
1403 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
1405 sess_data->iov[1].iov_base = ntlmssp_blob;
1406 sess_data->iov[1].iov_len = blob_length;
1408 rc = SMB2_sess_sendreceive(sess_data);
1409 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1411 /* If true, rc here is expected and not an error */
1412 if (sess_data->buf0_type != CIFS_NO_BUFFER &&
1413 rsp->sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
1419 if (offsetof(struct smb2_sess_setup_rsp, Buffer) !=
1420 le16_to_cpu(rsp->SecurityBufferOffset)) {
1421 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
1422 le16_to_cpu(rsp->SecurityBufferOffset));
1426 rc = decode_ntlmssp_challenge(rsp->Buffer,
1427 le16_to_cpu(rsp->SecurityBufferLength), ses);
1431 cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
1434 ses->Suid = rsp->sync_hdr.SessionId;
1435 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
1438 kfree(ntlmssp_blob);
1439 SMB2_sess_free_buffer(sess_data);
1441 sess_data->result = 0;
1442 sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
1446 kfree(ses->ntlmssp);
1447 ses->ntlmssp = NULL;
1448 sess_data->result = rc;
1449 sess_data->func = NULL;
1453 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
1456 struct cifs_ses *ses = sess_data->ses;
1457 struct smb2_sess_setup_req *req;
1458 struct smb2_sess_setup_rsp *rsp = NULL;
1459 unsigned char *ntlmssp_blob = NULL;
1460 bool use_spnego = false; /* else use raw ntlmssp */
1461 u16 blob_length = 0;
1463 rc = SMB2_sess_alloc_buffer(sess_data);
1467 req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
1468 req->sync_hdr.SessionId = ses->Suid;
1470 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
1473 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
1478 /* BB eventually need to add this */
1479 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1483 sess_data->iov[1].iov_base = ntlmssp_blob;
1484 sess_data->iov[1].iov_len = blob_length;
1486 rc = SMB2_sess_sendreceive(sess_data);
1490 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1492 ses->Suid = rsp->sync_hdr.SessionId;
1493 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
1495 rc = SMB2_sess_establish_session(sess_data);
1497 kfree(ntlmssp_blob);
1498 SMB2_sess_free_buffer(sess_data);
1499 kfree(ses->ntlmssp);
1500 ses->ntlmssp = NULL;
1501 sess_data->result = rc;
1502 sess_data->func = NULL;
1506 SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data)
1510 type = smb2_select_sectype(ses->server, ses->sectype);
1511 cifs_dbg(FYI, "sess setup type %d\n", type);
1512 if (type == Unspecified) {
1514 "Unable to select appropriate authentication method!");
1520 sess_data->func = SMB2_auth_kerberos;
1523 sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
1526 cifs_dbg(VFS, "secType %d not supported!\n", type);
1534 SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
1535 const struct nls_table *nls_cp)
1538 struct TCP_Server_Info *server = ses->server;
1539 struct SMB2_sess_data *sess_data;
1541 cifs_dbg(FYI, "Session Setup\n");
1544 WARN(1, "%s: server is NULL!\n", __func__);
1548 sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
1552 rc = SMB2_select_sec(ses, sess_data);
1555 sess_data->xid = xid;
1556 sess_data->ses = ses;
1557 sess_data->buf0_type = CIFS_NO_BUFFER;
1558 sess_data->nls_cp = (struct nls_table *) nls_cp;
1559 sess_data->previous_session = ses->Suid;
1562 * Initialize the session hash with the server one.
1564 memcpy(ses->preauth_sha_hash, ses->server->preauth_sha_hash,
1565 SMB2_PREAUTH_HASH_SIZE);
1567 while (sess_data->func)
1568 sess_data->func(sess_data);
1570 if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign))
1571 cifs_server_dbg(VFS, "signing requested but authenticated as guest\n");
1572 rc = sess_data->result;
1579 SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
1581 struct smb_rqst rqst;
1582 struct smb2_logoff_req *req; /* response is also trivial struct */
1584 struct TCP_Server_Info *server;
1586 unsigned int total_len;
1588 struct kvec rsp_iov;
1591 cifs_dbg(FYI, "disconnect session %p\n", ses);
1593 if (ses && (ses->server))
1594 server = ses->server;
1598 /* no need to send SMB logoff if uid already closed due to reconnect */
1599 if (ses->need_reconnect)
1600 goto smb2_session_already_dead;
1602 rc = smb2_plain_req_init(SMB2_LOGOFF, NULL, (void **) &req, &total_len);
1606 /* since no tcon, smb2_init can not do this, so do here */
1607 req->sync_hdr.SessionId = ses->Suid;
1609 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
1610 flags |= CIFS_TRANSFORM_REQ;
1611 else if (server->sign)
1612 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1614 flags |= CIFS_NO_RSP_BUF;
1616 iov[0].iov_base = (char *)req;
1617 iov[0].iov_len = total_len;
1619 memset(&rqst, 0, sizeof(struct smb_rqst));
1623 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
1624 cifs_small_buf_release(req);
1626 * No tcon so can't do
1627 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1630 smb2_session_already_dead:
1634 static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
1636 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
1639 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1641 /* These are similar values to what Windows uses */
1642 static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
1644 tcon->max_chunks = 256;
1645 tcon->max_bytes_chunk = 1048576;
1646 tcon->max_bytes_copy = 16777216;
1650 SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
1651 struct cifs_tcon *tcon, const struct nls_table *cp)
1653 struct smb_rqst rqst;
1654 struct smb2_tree_connect_req *req;
1655 struct smb2_tree_connect_rsp *rsp = NULL;
1657 struct kvec rsp_iov = { NULL, 0 };
1661 __le16 *unc_path = NULL;
1663 unsigned int total_len;
1664 struct TCP_Server_Info *server = ses->server;
1666 cifs_dbg(FYI, "TCON\n");
1668 if (!server || !tree)
1671 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
1672 if (unc_path == NULL)
1675 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
1677 if (unc_path_len < 2) {
1682 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
1684 atomic_set(&tcon->num_remote_opens, 0);
1685 rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, (void **) &req,
1692 if (smb3_encryption_required(tcon))
1693 flags |= CIFS_TRANSFORM_REQ;
1695 iov[0].iov_base = (char *)req;
1697 iov[0].iov_len = total_len - 1;
1699 /* Testing shows that buffer offset must be at location of Buffer[0] */
1700 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
1702 req->PathLength = cpu_to_le16(unc_path_len - 2);
1703 iov[1].iov_base = unc_path;
1704 iov[1].iov_len = unc_path_len;
1707 * 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1
1708 * unless it is guest or anonymous user. See MS-SMB2 3.2.5.3.1
1709 * (Samba servers don't always set the flag so also check if null user)
1711 if ((server->dialect == SMB311_PROT_ID) &&
1712 !smb3_encryption_required(tcon) &&
1713 !(ses->session_flags &
1714 (SMB2_SESSION_FLAG_IS_GUEST|SMB2_SESSION_FLAG_IS_NULL)) &&
1715 ((ses->user_name != NULL) || (ses->sectype == Kerberos)))
1716 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1718 memset(&rqst, 0, sizeof(struct smb_rqst));
1722 /* Need 64 for max size write so ask for more in case not there yet */
1723 req->sync_hdr.CreditRequest = cpu_to_le16(64);
1725 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
1726 cifs_small_buf_release(req);
1727 rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
1728 trace_smb3_tcon(xid, tcon->tid, ses->Suid, tree, rc);
1731 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
1732 tcon->need_reconnect = true;
1734 goto tcon_error_exit;
1737 switch (rsp->ShareType) {
1738 case SMB2_SHARE_TYPE_DISK:
1739 cifs_dbg(FYI, "connection to disk share\n");
1741 case SMB2_SHARE_TYPE_PIPE:
1743 cifs_dbg(FYI, "connection to pipe share\n");
1745 case SMB2_SHARE_TYPE_PRINT:
1747 cifs_dbg(FYI, "connection to printer\n");
1750 cifs_server_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
1752 goto tcon_error_exit;
1755 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
1756 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
1757 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1758 tcon->tidStatus = CifsGood;
1759 tcon->need_reconnect = false;
1760 tcon->tid = rsp->sync_hdr.TreeId;
1761 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
1763 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1764 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
1765 cifs_tcon_dbg(VFS, "DFS capability contradicts DFS flag\n");
1768 !(server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
1769 cifs_tcon_dbg(VFS, "Encryption is requested but not supported\n");
1771 init_copy_chunk_defaults(tcon);
1772 if (server->ops->validate_negotiate)
1773 rc = server->ops->validate_negotiate(xid, tcon);
1776 free_rsp_buf(resp_buftype, rsp);
1781 if (rsp && rsp->sync_hdr.Status == STATUS_BAD_NETWORK_NAME) {
1782 cifs_tcon_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
1788 SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1790 struct smb_rqst rqst;
1791 struct smb2_tree_disconnect_req *req; /* response is trivial */
1793 struct cifs_ses *ses = tcon->ses;
1795 unsigned int total_len;
1797 struct kvec rsp_iov;
1800 cifs_dbg(FYI, "Tree Disconnect\n");
1802 if (!ses || !(ses->server))
1805 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1808 rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req,
1813 if (smb3_encryption_required(tcon))
1814 flags |= CIFS_TRANSFORM_REQ;
1816 flags |= CIFS_NO_RSP_BUF;
1818 iov[0].iov_base = (char *)req;
1819 iov[0].iov_len = total_len;
1821 memset(&rqst, 0, sizeof(struct smb_rqst));
1825 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
1826 cifs_small_buf_release(req);
1828 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1834 static struct create_durable *
1835 create_durable_buf(void)
1837 struct create_durable *buf;
1839 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1843 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1844 (struct create_durable, Data));
1845 buf->ccontext.DataLength = cpu_to_le32(16);
1846 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1847 (struct create_durable, Name));
1848 buf->ccontext.NameLength = cpu_to_le16(4);
1849 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1857 static struct create_durable *
1858 create_reconnect_durable_buf(struct cifs_fid *fid)
1860 struct create_durable *buf;
1862 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1866 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1867 (struct create_durable, Data));
1868 buf->ccontext.DataLength = cpu_to_le32(16);
1869 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1870 (struct create_durable, Name));
1871 buf->ccontext.NameLength = cpu_to_le16(4);
1872 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1873 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
1874 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1883 parse_query_id_ctxt(struct create_context *cc, struct smb2_file_all_info *buf)
1885 struct create_on_disk_id *pdisk_id = (struct create_on_disk_id *)cc;
1887 cifs_dbg(FYI, "parse query id context 0x%llx 0x%llx\n",
1888 pdisk_id->DiskFileId, pdisk_id->VolumeId);
1889 buf->IndexNumber = pdisk_id->DiskFileId;
1893 smb2_parse_contexts(struct TCP_Server_Info *server,
1894 struct smb2_create_rsp *rsp,
1895 unsigned int *epoch, char *lease_key, __u8 *oplock,
1896 struct smb2_file_all_info *buf)
1899 struct create_context *cc;
1901 unsigned int remaining;
1905 data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset);
1906 remaining = le32_to_cpu(rsp->CreateContextsLength);
1907 cc = (struct create_context *)data_offset;
1909 /* Initialize inode number to 0 in case no valid data in qfid context */
1911 buf->IndexNumber = 0;
1913 while (remaining >= sizeof(struct create_context)) {
1914 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
1915 if (le16_to_cpu(cc->NameLength) == 4 &&
1916 strncmp(name, SMB2_CREATE_REQUEST_LEASE, 4) == 0)
1917 *oplock = server->ops->parse_lease_buf(cc, epoch,
1919 else if (buf && (le16_to_cpu(cc->NameLength) == 4) &&
1920 strncmp(name, SMB2_CREATE_QUERY_ON_DISK_ID, 4) == 0)
1921 parse_query_id_ctxt(cc, buf);
1923 next = le32_to_cpu(cc->Next);
1927 cc = (struct create_context *)((char *)cc + next);
1930 if (rsp->OplockLevel != SMB2_OPLOCK_LEVEL_LEASE)
1931 *oplock = rsp->OplockLevel;
1937 add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1938 unsigned int *num_iovec, u8 *lease_key, __u8 *oplock)
1940 struct smb2_create_req *req = iov[0].iov_base;
1941 unsigned int num = *num_iovec;
1943 iov[num].iov_base = server->ops->create_lease_buf(lease_key, *oplock);
1944 if (iov[num].iov_base == NULL)
1946 iov[num].iov_len = server->vals->create_lease_size;
1947 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1948 if (!req->CreateContextsOffset)
1949 req->CreateContextsOffset = cpu_to_le32(
1950 sizeof(struct smb2_create_req) +
1951 iov[num - 1].iov_len);
1952 le32_add_cpu(&req->CreateContextsLength,
1953 server->vals->create_lease_size);
1954 *num_iovec = num + 1;
1958 static struct create_durable_v2 *
1959 create_durable_v2_buf(struct cifs_open_parms *oparms)
1961 struct cifs_fid *pfid = oparms->fid;
1962 struct create_durable_v2 *buf;
1964 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
1968 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1969 (struct create_durable_v2, dcontext));
1970 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
1971 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1972 (struct create_durable_v2, Name));
1973 buf->ccontext.NameLength = cpu_to_le16(4);
1976 * NB: Handle timeout defaults to 0, which allows server to choose
1977 * (most servers default to 120 seconds) and most clients default to 0.
1978 * This can be overridden at mount ("handletimeout=") if the user wants
1979 * a different persistent (or resilient) handle timeout for all opens
1980 * opens on a particular SMB3 mount.
1982 buf->dcontext.Timeout = cpu_to_le32(oparms->tcon->handle_timeout);
1983 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1984 generate_random_uuid(buf->dcontext.CreateGuid);
1985 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
1987 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1995 static struct create_durable_handle_reconnect_v2 *
1996 create_reconnect_durable_v2_buf(struct cifs_fid *fid)
1998 struct create_durable_handle_reconnect_v2 *buf;
2000 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
2005 buf->ccontext.DataOffset =
2006 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
2008 buf->ccontext.DataLength =
2009 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
2010 buf->ccontext.NameOffset =
2011 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
2013 buf->ccontext.NameLength = cpu_to_le16(4);
2015 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
2016 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
2017 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
2018 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
2020 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
2029 add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
2030 struct cifs_open_parms *oparms)
2032 struct smb2_create_req *req = iov[0].iov_base;
2033 unsigned int num = *num_iovec;
2035 iov[num].iov_base = create_durable_v2_buf(oparms);
2036 if (iov[num].iov_base == NULL)
2038 iov[num].iov_len = sizeof(struct create_durable_v2);
2039 if (!req->CreateContextsOffset)
2040 req->CreateContextsOffset =
2041 cpu_to_le32(sizeof(struct smb2_create_req) +
2043 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
2044 *num_iovec = num + 1;
2049 add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
2050 struct cifs_open_parms *oparms)
2052 struct smb2_create_req *req = iov[0].iov_base;
2053 unsigned int num = *num_iovec;
2055 /* indicate that we don't need to relock the file */
2056 oparms->reconnect = false;
2058 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
2059 if (iov[num].iov_base == NULL)
2061 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
2062 if (!req->CreateContextsOffset)
2063 req->CreateContextsOffset =
2064 cpu_to_le32(sizeof(struct smb2_create_req) +
2066 le32_add_cpu(&req->CreateContextsLength,
2067 sizeof(struct create_durable_handle_reconnect_v2));
2068 *num_iovec = num + 1;
2073 add_durable_context(struct kvec *iov, unsigned int *num_iovec,
2074 struct cifs_open_parms *oparms, bool use_persistent)
2076 struct smb2_create_req *req = iov[0].iov_base;
2077 unsigned int num = *num_iovec;
2079 if (use_persistent) {
2080 if (oparms->reconnect)
2081 return add_durable_reconnect_v2_context(iov, num_iovec,
2084 return add_durable_v2_context(iov, num_iovec, oparms);
2087 if (oparms->reconnect) {
2088 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
2089 /* indicate that we don't need to relock the file */
2090 oparms->reconnect = false;
2092 iov[num].iov_base = create_durable_buf();
2093 if (iov[num].iov_base == NULL)
2095 iov[num].iov_len = sizeof(struct create_durable);
2096 if (!req->CreateContextsOffset)
2097 req->CreateContextsOffset =
2098 cpu_to_le32(sizeof(struct smb2_create_req) +
2100 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
2101 *num_iovec = num + 1;
2105 /* See MS-SMB2 2.2.13.2.7 */
2106 static struct crt_twarp_ctxt *
2107 create_twarp_buf(__u64 timewarp)
2109 struct crt_twarp_ctxt *buf;
2111 buf = kzalloc(sizeof(struct crt_twarp_ctxt), GFP_KERNEL);
2115 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2116 (struct crt_twarp_ctxt, Timestamp));
2117 buf->ccontext.DataLength = cpu_to_le32(8);
2118 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2119 (struct crt_twarp_ctxt, Name));
2120 buf->ccontext.NameLength = cpu_to_le16(4);
2121 /* SMB2_CREATE_TIMEWARP_TOKEN is "TWrp" */
2126 buf->Timestamp = cpu_to_le64(timewarp);
2130 /* See MS-SMB2 2.2.13.2.7 */
2132 add_twarp_context(struct kvec *iov, unsigned int *num_iovec, __u64 timewarp)
2134 struct smb2_create_req *req = iov[0].iov_base;
2135 unsigned int num = *num_iovec;
2137 iov[num].iov_base = create_twarp_buf(timewarp);
2138 if (iov[num].iov_base == NULL)
2140 iov[num].iov_len = sizeof(struct crt_twarp_ctxt);
2141 if (!req->CreateContextsOffset)
2142 req->CreateContextsOffset = cpu_to_le32(
2143 sizeof(struct smb2_create_req) +
2144 iov[num - 1].iov_len);
2145 le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_twarp_ctxt));
2146 *num_iovec = num + 1;
2150 static struct crt_query_id_ctxt *
2151 create_query_id_buf(void)
2153 struct crt_query_id_ctxt *buf;
2155 buf = kzalloc(sizeof(struct crt_query_id_ctxt), GFP_KERNEL);
2159 buf->ccontext.DataOffset = cpu_to_le16(0);
2160 buf->ccontext.DataLength = cpu_to_le32(0);
2161 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2162 (struct crt_query_id_ctxt, Name));
2163 buf->ccontext.NameLength = cpu_to_le16(4);
2164 /* SMB2_CREATE_QUERY_ON_DISK_ID is "QFid" */
2172 /* See MS-SMB2 2.2.13.2.9 */
2174 add_query_id_context(struct kvec *iov, unsigned int *num_iovec)
2176 struct smb2_create_req *req = iov[0].iov_base;
2177 unsigned int num = *num_iovec;
2179 iov[num].iov_base = create_query_id_buf();
2180 if (iov[num].iov_base == NULL)
2182 iov[num].iov_len = sizeof(struct crt_query_id_ctxt);
2183 if (!req->CreateContextsOffset)
2184 req->CreateContextsOffset = cpu_to_le32(
2185 sizeof(struct smb2_create_req) +
2186 iov[num - 1].iov_len);
2187 le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_query_id_ctxt));
2188 *num_iovec = num + 1;
2193 alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
2194 const char *treename, const __le16 *path)
2196 int treename_len, path_len;
2197 struct nls_table *cp;
2198 const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
2203 treename_len = strlen(treename);
2204 if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\'))
2210 path_len = UniStrnlen((wchar_t *)path, PATH_MAX);
2213 * make room for one path separator between the treename and
2216 *out_len = treename_len + 1 + path_len;
2219 * final path needs to be null-terminated UTF16 with a
2223 *out_size = roundup((*out_len+1)*2, 8);
2224 *out_path = kzalloc(*out_size, GFP_KERNEL);
2228 cp = load_nls_default();
2229 cifs_strtoUTF16(*out_path, treename, treename_len, cp);
2230 UniStrcat(*out_path, sep);
2231 UniStrcat(*out_path, path);
2237 int smb311_posix_mkdir(const unsigned int xid, struct inode *inode,
2238 umode_t mode, struct cifs_tcon *tcon,
2239 const char *full_path,
2240 struct cifs_sb_info *cifs_sb)
2242 struct smb_rqst rqst;
2243 struct smb2_create_req *req;
2244 struct smb2_create_rsp *rsp = NULL;
2245 struct cifs_ses *ses = tcon->ses;
2246 struct kvec iov[3]; /* make sure at least one for each open context */
2247 struct kvec rsp_iov = {NULL, 0};
2250 __le16 *copy_path = NULL;
2253 unsigned int n_iov = 2;
2254 __u32 file_attributes = 0;
2255 char *pc_buf = NULL;
2257 unsigned int total_len;
2258 __le16 *utf16_path = NULL;
2260 cifs_dbg(FYI, "mkdir\n");
2262 /* resource #1: path allocation */
2263 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2267 if (!ses || !(ses->server)) {
2272 /* resource #2: request */
2273 rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
2278 if (smb3_encryption_required(tcon))
2279 flags |= CIFS_TRANSFORM_REQ;
2281 req->ImpersonationLevel = IL_IMPERSONATION;
2282 req->DesiredAccess = cpu_to_le32(FILE_WRITE_ATTRIBUTES);
2283 /* File attributes ignored on open (used in create though) */
2284 req->FileAttributes = cpu_to_le32(file_attributes);
2285 req->ShareAccess = FILE_SHARE_ALL_LE;
2286 req->CreateDisposition = cpu_to_le32(FILE_CREATE);
2287 req->CreateOptions = cpu_to_le32(CREATE_NOT_FILE);
2289 iov[0].iov_base = (char *)req;
2290 /* -1 since last byte is buf[0] which is sent below (path) */
2291 iov[0].iov_len = total_len - 1;
2293 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
2295 /* [MS-SMB2] 2.2.13 NameOffset:
2296 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2297 * the SMB2 header, the file name includes a prefix that will
2298 * be processed during DFS name normalization as specified in
2299 * section 3.3.5.9. Otherwise, the file name is relative to
2300 * the share that is identified by the TreeId in the SMB2
2303 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
2306 req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
2307 rc = alloc_path_with_tree_prefix(©_path, ©_size,
2309 tcon->treeName, utf16_path);
2313 req->NameLength = cpu_to_le16(name_len * 2);
2314 uni_path_len = copy_size;
2315 /* free before overwriting resource */
2317 utf16_path = copy_path;
2319 uni_path_len = (2 * UniStrnlen((wchar_t *)utf16_path, PATH_MAX)) + 2;
2320 /* MUST set path len (NameLength) to 0 opening root of share */
2321 req->NameLength = cpu_to_le16(uni_path_len - 2);
2322 if (uni_path_len % 8 != 0) {
2323 copy_size = roundup(uni_path_len, 8);
2324 copy_path = kzalloc(copy_size, GFP_KERNEL);
2329 memcpy((char *)copy_path, (const char *)utf16_path,
2331 uni_path_len = copy_size;
2332 /* free before overwriting resource */
2334 utf16_path = copy_path;
2338 iov[1].iov_len = uni_path_len;
2339 iov[1].iov_base = utf16_path;
2340 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2342 if (tcon->posix_extensions) {
2343 /* resource #3: posix buf */
2344 rc = add_posix_context(iov, &n_iov, mode);
2347 pc_buf = iov[n_iov-1].iov_base;
2351 memset(&rqst, 0, sizeof(struct smb_rqst));
2353 rqst.rq_nvec = n_iov;
2355 trace_smb3_posix_mkdir_enter(xid, tcon->tid, ses->Suid, CREATE_NOT_FILE,
2356 FILE_WRITE_ATTRIBUTES);
2357 /* resource #4: response buffer */
2358 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
2360 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
2361 trace_smb3_posix_mkdir_err(xid, tcon->tid, ses->Suid,
2363 FILE_WRITE_ATTRIBUTES, rc);
2364 goto err_free_rsp_buf;
2367 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2368 trace_smb3_posix_mkdir_done(xid, rsp->PersistentFileId, tcon->tid,
2369 ses->Suid, CREATE_NOT_FILE,
2370 FILE_WRITE_ATTRIBUTES);
2372 SMB2_close(xid, tcon, rsp->PersistentFileId, rsp->VolatileFileId);
2374 /* Eventually save off posix specific response info and timestaps */
2377 free_rsp_buf(resp_buftype, rsp);
2380 cifs_small_buf_release(req);
2387 SMB2_open_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, __u8 *oplock,
2388 struct cifs_open_parms *oparms, __le16 *path)
2390 struct TCP_Server_Info *server = tcon->ses->server;
2391 struct smb2_create_req *req;
2392 unsigned int n_iov = 2;
2393 __u32 file_attributes = 0;
2396 unsigned int total_len;
2397 struct kvec *iov = rqst->rq_iov;
2401 rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
2405 iov[0].iov_base = (char *)req;
2406 /* -1 since last byte is buf[0] which is sent below (path) */
2407 iov[0].iov_len = total_len - 1;
2409 if (oparms->create_options & CREATE_OPTION_READONLY)
2410 file_attributes |= ATTR_READONLY;
2411 if (oparms->create_options & CREATE_OPTION_SPECIAL)
2412 file_attributes |= ATTR_SYSTEM;
2414 req->ImpersonationLevel = IL_IMPERSONATION;
2415 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
2416 /* File attributes ignored on open (used in create though) */
2417 req->FileAttributes = cpu_to_le32(file_attributes);
2418 req->ShareAccess = FILE_SHARE_ALL_LE;
2419 req->CreateDisposition = cpu_to_le32(oparms->disposition);
2420 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
2421 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
2423 /* [MS-SMB2] 2.2.13 NameOffset:
2424 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2425 * the SMB2 header, the file name includes a prefix that will
2426 * be processed during DFS name normalization as specified in
2427 * section 3.3.5.9. Otherwise, the file name is relative to
2428 * the share that is identified by the TreeId in the SMB2
2431 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
2434 req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
2435 rc = alloc_path_with_tree_prefix(©_path, ©_size,
2437 tcon->treeName, path);
2440 req->NameLength = cpu_to_le16(name_len * 2);
2441 uni_path_len = copy_size;
2444 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
2445 /* MUST set path len (NameLength) to 0 opening root of share */
2446 req->NameLength = cpu_to_le16(uni_path_len - 2);
2447 copy_size = uni_path_len;
2448 if (copy_size % 8 != 0)
2449 copy_size = roundup(copy_size, 8);
2450 copy_path = kzalloc(copy_size, GFP_KERNEL);
2453 memcpy((char *)copy_path, (const char *)path,
2455 uni_path_len = copy_size;
2459 iov[1].iov_len = uni_path_len;
2460 iov[1].iov_base = path;
2462 if ((!server->oplocks) || (tcon->no_lease))
2463 *oplock = SMB2_OPLOCK_LEVEL_NONE;
2465 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
2466 *oplock == SMB2_OPLOCK_LEVEL_NONE)
2467 req->RequestedOplockLevel = *oplock;
2468 else if (!(server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING) &&
2469 (oparms->create_options & CREATE_NOT_FILE))
2470 req->RequestedOplockLevel = *oplock; /* no srv lease support */
2472 rc = add_lease_context(server, iov, &n_iov,
2473 oparms->fid->lease_key, oplock);
2478 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
2479 /* need to set Next field of lease context if we request it */
2480 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
2481 struct create_context *ccontext =
2482 (struct create_context *)iov[n_iov-1].iov_base;
2484 cpu_to_le32(server->vals->create_lease_size);
2487 rc = add_durable_context(iov, &n_iov, oparms,
2488 tcon->use_persistent);
2493 if (tcon->posix_extensions) {
2495 struct create_context *ccontext =
2496 (struct create_context *)iov[n_iov-1].iov_base;
2498 cpu_to_le32(iov[n_iov-1].iov_len);
2501 rc = add_posix_context(iov, &n_iov, oparms->mode);
2506 if (tcon->snapshot_time) {
2507 cifs_dbg(FYI, "adding snapshot context\n");
2509 struct create_context *ccontext =
2510 (struct create_context *)iov[n_iov-1].iov_base;
2512 cpu_to_le32(iov[n_iov-1].iov_len);
2515 rc = add_twarp_context(iov, &n_iov, tcon->snapshot_time);
2521 struct create_context *ccontext =
2522 (struct create_context *)iov[n_iov-1].iov_base;
2523 ccontext->Next = cpu_to_le32(iov[n_iov-1].iov_len);
2525 add_query_id_context(iov, &n_iov);
2527 rqst->rq_nvec = n_iov;
2531 /* rq_iov[0] is the request and is released by cifs_small_buf_release().
2532 * All other vectors are freed by kfree().
2535 SMB2_open_free(struct smb_rqst *rqst)
2539 if (rqst && rqst->rq_iov) {
2540 cifs_small_buf_release(rqst->rq_iov[0].iov_base);
2541 for (i = 1; i < rqst->rq_nvec; i++)
2542 if (rqst->rq_iov[i].iov_base != smb2_padding)
2543 kfree(rqst->rq_iov[i].iov_base);
2548 SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
2549 __u8 *oplock, struct smb2_file_all_info *buf,
2550 struct kvec *err_iov, int *buftype)
2552 struct smb_rqst rqst;
2553 struct smb2_create_rsp *rsp = NULL;
2554 struct TCP_Server_Info *server;
2555 struct cifs_tcon *tcon = oparms->tcon;
2556 struct cifs_ses *ses = tcon->ses;
2557 struct kvec iov[SMB2_CREATE_IOV_SIZE];
2558 struct kvec rsp_iov = {NULL, 0};
2559 int resp_buftype = CIFS_NO_BUFFER;
2563 cifs_dbg(FYI, "create/open\n");
2564 if (ses && (ses->server))
2565 server = ses->server;
2569 if (smb3_encryption_required(tcon))
2570 flags |= CIFS_TRANSFORM_REQ;
2572 memset(&rqst, 0, sizeof(struct smb_rqst));
2573 memset(&iov, 0, sizeof(iov));
2575 rqst.rq_nvec = SMB2_CREATE_IOV_SIZE;
2577 rc = SMB2_open_init(tcon, &rqst, oplock, oparms, path);
2581 trace_smb3_open_enter(xid, tcon->tid, tcon->ses->Suid,
2582 oparms->create_options, oparms->desired_access);
2584 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
2586 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2589 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
2590 if (err_iov && rsp) {
2592 *buftype = resp_buftype;
2593 resp_buftype = CIFS_NO_BUFFER;
2596 trace_smb3_open_err(xid, tcon->tid, ses->Suid,
2597 oparms->create_options, oparms->desired_access, rc);
2598 if (rc == -EREMCHG) {
2599 printk_once(KERN_WARNING "server share %s deleted\n",
2601 tcon->need_reconnect = true;
2605 trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid,
2606 ses->Suid, oparms->create_options,
2607 oparms->desired_access);
2609 atomic_inc(&tcon->num_remote_opens);
2610 oparms->fid->persistent_fid = rsp->PersistentFileId;
2611 oparms->fid->volatile_fid = rsp->VolatileFileId;
2612 #ifdef CONFIG_CIFS_DEBUG2
2613 oparms->fid->mid = le64_to_cpu(rsp->sync_hdr.MessageId);
2614 #endif /* CIFS_DEBUG2 */
2617 memcpy(buf, &rsp->CreationTime, 32);
2618 buf->AllocationSize = rsp->AllocationSize;
2619 buf->EndOfFile = rsp->EndofFile;
2620 buf->Attributes = rsp->FileAttributes;
2621 buf->NumberOfLinks = cpu_to_le32(1);
2622 buf->DeletePending = 0;
2626 smb2_parse_contexts(server, rsp, &oparms->fid->epoch,
2627 oparms->fid->lease_key, oplock, buf);
2629 SMB2_open_free(&rqst);
2630 free_rsp_buf(resp_buftype, rsp);
2635 SMB2_ioctl_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
2636 u64 persistent_fid, u64 volatile_fid, u32 opcode,
2637 bool is_fsctl, char *in_data, u32 indatalen,
2638 __u32 max_response_size)
2640 struct smb2_ioctl_req *req;
2641 struct kvec *iov = rqst->rq_iov;
2642 unsigned int total_len;
2646 rc = smb2_plain_req_init(SMB2_IOCTL, tcon, (void **) &req, &total_len);
2652 * indatalen is usually small at a couple of bytes max, so
2653 * just allocate through generic pool
2655 in_data_buf = kmemdup(in_data, indatalen, GFP_NOFS);
2657 cifs_small_buf_release(req);
2662 req->CtlCode = cpu_to_le32(opcode);
2663 req->PersistentFileId = persistent_fid;
2664 req->VolatileFileId = volatile_fid;
2666 iov[0].iov_base = (char *)req;
2668 * If no input data, the size of ioctl struct in
2669 * protocol spec still includes a 1 byte data buffer,
2670 * but if input data passed to ioctl, we do not
2671 * want to double count this, so we do not send
2672 * the dummy one byte of data in iovec[0] if sending
2673 * input data (in iovec[1]).
2676 req->InputCount = cpu_to_le32(indatalen);
2677 /* do not set InputOffset if no input data */
2679 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer));
2681 iov[0].iov_len = total_len - 1;
2682 iov[1].iov_base = in_data_buf;
2683 iov[1].iov_len = indatalen;
2686 iov[0].iov_len = total_len;
2689 req->OutputOffset = 0;
2690 req->OutputCount = 0; /* MBZ */
2693 * In most cases max_response_size is set to 16K (CIFSMaxBufSize)
2694 * We Could increase default MaxOutputResponse, but that could require
2695 * more credits. Windows typically sets this smaller, but for some
2696 * ioctls it may be useful to allow server to send more. No point
2697 * limiting what the server can send as long as fits in one credit
2698 * We can not handle more than CIFS_MAX_BUF_SIZE yet but may want
2699 * to increase this limit up in the future.
2700 * Note that for snapshot queries that servers like Azure expect that
2701 * the first query be minimal size (and just used to get the number/size
2702 * of previous versions) so response size must be specified as EXACTLY
2703 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2704 * of eight bytes. Currently that is the only case where we set max
2705 * response size smaller.
2707 req->MaxOutputResponse = cpu_to_le32(max_response_size);
2710 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
2714 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
2715 if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO)
2716 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
2722 SMB2_ioctl_free(struct smb_rqst *rqst)
2725 if (rqst && rqst->rq_iov) {
2726 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
2727 for (i = 1; i < rqst->rq_nvec; i++)
2728 if (rqst->rq_iov[i].iov_base != smb2_padding)
2729 kfree(rqst->rq_iov[i].iov_base);
2735 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
2738 SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2739 u64 volatile_fid, u32 opcode, bool is_fsctl,
2740 char *in_data, u32 indatalen, u32 max_out_data_len,
2741 char **out_data, u32 *plen /* returned data len */)
2743 struct smb_rqst rqst;
2744 struct smb2_ioctl_rsp *rsp = NULL;
2745 struct cifs_ses *ses;
2746 struct kvec iov[SMB2_IOCTL_IOV_SIZE];
2747 struct kvec rsp_iov = {NULL, 0};
2748 int resp_buftype = CIFS_NO_BUFFER;
2751 struct TCP_Server_Info *server;
2753 cifs_dbg(FYI, "SMB2 IOCTL\n");
2755 if (out_data != NULL)
2758 /* zero out returned data len, in case of error */
2769 server = ses->server;
2773 if (smb3_encryption_required(tcon))
2774 flags |= CIFS_TRANSFORM_REQ;
2776 memset(&rqst, 0, sizeof(struct smb_rqst));
2777 memset(&iov, 0, sizeof(iov));
2779 rqst.rq_nvec = SMB2_IOCTL_IOV_SIZE;
2781 rc = SMB2_ioctl_init(tcon, &rqst, persistent_fid, volatile_fid, opcode,
2782 is_fsctl, in_data, indatalen, max_out_data_len);
2786 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
2788 rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
2791 trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid,
2792 ses->Suid, 0, opcode, rc);
2794 if ((rc != 0) && (rc != -EINVAL) && (rc != -E2BIG)) {
2795 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
2797 } else if (rc == -EINVAL) {
2798 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
2799 (opcode != FSCTL_SRV_COPYCHUNK)) {
2800 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
2803 } else if (rc == -E2BIG) {
2804 if (opcode != FSCTL_QUERY_ALLOCATED_RANGES) {
2805 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
2810 /* check if caller wants to look at return data or just return rc */
2811 if ((plen == NULL) || (out_data == NULL))
2814 *plen = le32_to_cpu(rsp->OutputCount);
2816 /* We check for obvious errors in the output buffer length and offset */
2818 goto ioctl_exit; /* server returned no data */
2819 else if (*plen > rsp_iov.iov_len || *plen > 0xFF00) {
2820 cifs_tcon_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
2826 if (rsp_iov.iov_len - *plen < le32_to_cpu(rsp->OutputOffset)) {
2827 cifs_tcon_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
2828 le32_to_cpu(rsp->OutputOffset));
2834 *out_data = kmemdup((char *)rsp + le32_to_cpu(rsp->OutputOffset),
2836 if (*out_data == NULL) {
2842 SMB2_ioctl_free(&rqst);
2843 free_rsp_buf(resp_buftype, rsp);
2848 * Individual callers to ioctl worker function follow
2852 SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2853 u64 persistent_fid, u64 volatile_fid)
2856 struct compress_ioctl fsctl_input;
2857 char *ret_data = NULL;
2859 fsctl_input.CompressionState =
2860 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
2862 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
2863 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
2864 (char *)&fsctl_input /* data input */,
2865 2 /* in data len */, CIFSMaxBufSize /* max out data */,
2866 &ret_data /* out data */, NULL);
2868 cifs_dbg(FYI, "set compression rc %d\n", rc);
2874 SMB2_close_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
2875 u64 persistent_fid, u64 volatile_fid)
2877 struct smb2_close_req *req;
2878 struct kvec *iov = rqst->rq_iov;
2879 unsigned int total_len;
2882 rc = smb2_plain_req_init(SMB2_CLOSE, tcon, (void **) &req, &total_len);
2886 req->PersistentFileId = persistent_fid;
2887 req->VolatileFileId = volatile_fid;
2888 iov[0].iov_base = (char *)req;
2889 iov[0].iov_len = total_len;
2895 SMB2_close_free(struct smb_rqst *rqst)
2897 if (rqst && rqst->rq_iov)
2898 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
2902 SMB2_close_flags(const unsigned int xid, struct cifs_tcon *tcon,
2903 u64 persistent_fid, u64 volatile_fid, int flags)
2905 struct smb_rqst rqst;
2906 struct smb2_close_rsp *rsp = NULL;
2907 struct cifs_ses *ses = tcon->ses;
2909 struct kvec rsp_iov;
2910 int resp_buftype = CIFS_NO_BUFFER;
2913 cifs_dbg(FYI, "Close\n");
2915 if (!ses || !(ses->server))
2918 if (smb3_encryption_required(tcon))
2919 flags |= CIFS_TRANSFORM_REQ;
2921 memset(&rqst, 0, sizeof(struct smb_rqst));
2922 memset(&iov, 0, sizeof(iov));
2926 trace_smb3_close_enter(xid, persistent_fid, tcon->tid, ses->Suid);
2927 rc = SMB2_close_init(tcon, &rqst, persistent_fid, volatile_fid);
2931 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
2932 rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
2935 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
2936 trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid,
2940 trace_smb3_close_done(xid, persistent_fid, tcon->tid,
2943 atomic_dec(&tcon->num_remote_opens);
2945 /* BB FIXME - decode close response, update inode for caching */
2948 SMB2_close_free(&rqst);
2949 free_rsp_buf(resp_buftype, rsp);
2954 SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
2955 u64 persistent_fid, u64 volatile_fid)
2957 return SMB2_close_flags(xid, tcon, persistent_fid, volatile_fid, 0);
2961 smb2_validate_iov(unsigned int offset, unsigned int buffer_length,
2962 struct kvec *iov, unsigned int min_buf_size)
2964 unsigned int smb_len = iov->iov_len;
2965 char *end_of_smb = smb_len + (char *)iov->iov_base;
2966 char *begin_of_buf = offset + (char *)iov->iov_base;
2967 char *end_of_buf = begin_of_buf + buffer_length;
2970 if (buffer_length < min_buf_size) {
2971 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
2972 buffer_length, min_buf_size);
2976 /* check if beyond RFC1001 maximum length */
2977 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
2978 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
2979 buffer_length, smb_len);
2983 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
2984 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
2992 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2993 * Caller must free buffer.
2996 smb2_validate_and_copy_iov(unsigned int offset, unsigned int buffer_length,
2997 struct kvec *iov, unsigned int minbufsize,
3000 char *begin_of_buf = offset + (char *)iov->iov_base;
3006 rc = smb2_validate_iov(offset, buffer_length, iov, minbufsize);
3010 memcpy(data, begin_of_buf, buffer_length);
3016 SMB2_query_info_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
3017 u64 persistent_fid, u64 volatile_fid,
3018 u8 info_class, u8 info_type, u32 additional_info,
3019 size_t output_len, size_t input_len, void *input)
3021 struct smb2_query_info_req *req;
3022 struct kvec *iov = rqst->rq_iov;
3023 unsigned int total_len;
3026 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
3031 req->InfoType = info_type;
3032 req->FileInfoClass = info_class;
3033 req->PersistentFileId = persistent_fid;
3034 req->VolatileFileId = volatile_fid;
3035 req->AdditionalInformation = cpu_to_le32(additional_info);
3037 req->OutputBufferLength = cpu_to_le32(output_len);
3039 req->InputBufferLength = cpu_to_le32(input_len);
3040 /* total_len for smb query request never close to le16 max */
3041 req->InputBufferOffset = cpu_to_le16(total_len - 1);
3042 memcpy(req->Buffer, input, input_len);
3045 iov[0].iov_base = (char *)req;
3047 iov[0].iov_len = total_len - 1 + input_len;
3052 SMB2_query_info_free(struct smb_rqst *rqst)
3054 if (rqst && rqst->rq_iov)
3055 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
3059 query_info(const unsigned int xid, struct cifs_tcon *tcon,
3060 u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
3061 u32 additional_info, size_t output_len, size_t min_len, void **data,
3064 struct smb_rqst rqst;
3065 struct smb2_query_info_rsp *rsp = NULL;
3067 struct kvec rsp_iov;
3069 int resp_buftype = CIFS_NO_BUFFER;
3070 struct cifs_ses *ses = tcon->ses;
3071 struct TCP_Server_Info *server;
3073 bool allocated = false;
3075 cifs_dbg(FYI, "Query Info\n");
3079 server = ses->server;
3083 if (smb3_encryption_required(tcon))
3084 flags |= CIFS_TRANSFORM_REQ;
3086 memset(&rqst, 0, sizeof(struct smb_rqst));
3087 memset(&iov, 0, sizeof(iov));
3091 rc = SMB2_query_info_init(tcon, &rqst, persistent_fid, volatile_fid,
3092 info_class, info_type, additional_info,
3093 output_len, 0, NULL);
3097 trace_smb3_query_info_enter(xid, persistent_fid, tcon->tid,
3098 ses->Suid, info_class, (__u32)info_type);
3100 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
3101 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
3104 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
3105 trace_smb3_query_info_err(xid, persistent_fid, tcon->tid,
3106 ses->Suid, info_class, (__u32)info_type, rc);
3110 trace_smb3_query_info_done(xid, persistent_fid, tcon->tid,
3111 ses->Suid, info_class, (__u32)info_type);
3114 *dlen = le32_to_cpu(rsp->OutputBufferLength);
3116 *data = kmalloc(*dlen, GFP_KERNEL);
3119 "Error %d allocating memory for acl\n",
3129 rc = smb2_validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset),
3130 le32_to_cpu(rsp->OutputBufferLength),
3131 &rsp_iov, min_len, *data);
3132 if (rc && allocated) {
3139 SMB2_query_info_free(&rqst);
3140 free_rsp_buf(resp_buftype, rsp);
3144 int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
3145 u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data)
3147 return query_info(xid, tcon, persistent_fid, volatile_fid,
3148 FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0,
3149 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
3150 sizeof(struct smb2_file_all_info), (void **)&data,
3155 SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
3156 u64 persistent_fid, u64 volatile_fid,
3157 void **data, u32 *plen)
3159 __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO;
3162 return query_info(xid, tcon, persistent_fid, volatile_fid,
3163 0, SMB2_O_INFO_SECURITY, additional_info,
3164 SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen);
3168 SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
3169 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
3171 return query_info(xid, tcon, persistent_fid, volatile_fid,
3172 FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0,
3173 sizeof(struct smb2_file_internal_info),
3174 sizeof(struct smb2_file_internal_info),
3175 (void **)&uniqueid, NULL);
3179 * CHANGE_NOTIFY Request is sent to get notifications on changes to a directory
3180 * See MS-SMB2 2.2.35 and 2.2.36
3184 SMB2_notify_init(const unsigned int xid, struct smb_rqst *rqst,
3185 struct cifs_tcon *tcon, u64 persistent_fid, u64 volatile_fid,
3186 u32 completion_filter, bool watch_tree)
3188 struct smb2_change_notify_req *req;
3189 struct kvec *iov = rqst->rq_iov;
3190 unsigned int total_len;
3193 rc = smb2_plain_req_init(SMB2_CHANGE_NOTIFY, tcon, (void **) &req, &total_len);
3197 req->PersistentFileId = persistent_fid;
3198 req->VolatileFileId = volatile_fid;
3199 req->OutputBufferLength = SMB2_MAX_BUFFER_SIZE - MAX_SMB2_HDR_SIZE;
3200 req->CompletionFilter = cpu_to_le32(completion_filter);
3202 req->Flags = cpu_to_le16(SMB2_WATCH_TREE);
3206 iov[0].iov_base = (char *)req;
3207 iov[0].iov_len = total_len;
3213 SMB2_change_notify(const unsigned int xid, struct cifs_tcon *tcon,
3214 u64 persistent_fid, u64 volatile_fid, bool watch_tree,
3215 u32 completion_filter)
3217 struct cifs_ses *ses = tcon->ses;
3218 struct smb_rqst rqst;
3220 struct kvec rsp_iov = {NULL, 0};
3221 int resp_buftype = CIFS_NO_BUFFER;
3225 cifs_dbg(FYI, "change notify\n");
3226 if (!ses || !(ses->server))
3229 if (smb3_encryption_required(tcon))
3230 flags |= CIFS_TRANSFORM_REQ;
3232 memset(&rqst, 0, sizeof(struct smb_rqst));
3233 memset(&iov, 0, sizeof(iov));
3237 rc = SMB2_notify_init(xid, &rqst, tcon, persistent_fid, volatile_fid,
3238 completion_filter, watch_tree);
3242 trace_smb3_notify_enter(xid, persistent_fid, tcon->tid, ses->Suid,
3243 (u8)watch_tree, completion_filter);
3244 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
3247 cifs_stats_fail_inc(tcon, SMB2_CHANGE_NOTIFY_HE);
3248 trace_smb3_notify_err(xid, persistent_fid, tcon->tid, ses->Suid,
3249 (u8)watch_tree, completion_filter, rc);
3251 trace_smb3_notify_done(xid, persistent_fid, tcon->tid,
3252 ses->Suid, (u8)watch_tree, completion_filter);
3256 cifs_small_buf_release(rqst.rq_iov[0].iov_base); /* request */
3257 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
3264 * This is a no-op for now. We're not really interested in the reply, but
3265 * rather in the fact that the server sent one and that server->lstrp
3268 * FIXME: maybe we should consider checking that the reply matches request?
3271 smb2_echo_callback(struct mid_q_entry *mid)
3273 struct TCP_Server_Info *server = mid->callback_data;
3274 struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
3275 struct cifs_credits credits = { .value = 0, .instance = 0 };
3277 if (mid->mid_state == MID_RESPONSE_RECEIVED
3278 || mid->mid_state == MID_RESPONSE_MALFORMED) {
3279 credits.value = le16_to_cpu(rsp->sync_hdr.CreditRequest);
3280 credits.instance = server->reconnect_instance;
3283 DeleteMidQEntry(mid);
3284 add_credits(server, &credits, CIFS_ECHO_OP);
3287 void smb2_reconnect_server(struct work_struct *work)
3289 struct TCP_Server_Info *server = container_of(work,
3290 struct TCP_Server_Info, reconnect.work);
3291 struct cifs_ses *ses;
3292 struct cifs_tcon *tcon, *tcon2;
3293 struct list_head tmp_list;
3294 int tcon_exist = false;
3296 int resched = false;
3299 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
3300 mutex_lock(&server->reconnect_mutex);
3302 INIT_LIST_HEAD(&tmp_list);
3303 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
3305 spin_lock(&cifs_tcp_ses_lock);
3306 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
3307 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
3308 if (tcon->need_reconnect || tcon->need_reopen_files) {
3310 list_add_tail(&tcon->rlist, &tmp_list);
3315 * IPC has the same lifetime as its session and uses its
3318 if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) {
3319 list_add_tail(&ses->tcon_ipc->rlist, &tmp_list);
3325 * Get the reference to server struct to be sure that the last call of
3326 * cifs_put_tcon() in the loop below won't release the server pointer.
3329 server->srv_count++;
3331 spin_unlock(&cifs_tcp_ses_lock);
3333 list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
3334 rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon);
3336 cifs_reopen_persistent_handles(tcon);
3339 list_del_init(&tcon->rlist);
3341 cifs_put_smb_ses(tcon->ses);
3343 cifs_put_tcon(tcon);
3346 cifs_dbg(FYI, "Reconnecting tcons finished\n");
3348 queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
3349 mutex_unlock(&server->reconnect_mutex);
3351 /* now we can safely release srv struct */
3353 cifs_put_tcp_session(server, 1);
3357 SMB2_echo(struct TCP_Server_Info *server)
3359 struct smb2_echo_req *req;
3362 struct smb_rqst rqst = { .rq_iov = iov,
3364 unsigned int total_len;
3366 cifs_dbg(FYI, "In echo request\n");
3368 if (server->tcpStatus == CifsNeedNegotiate) {
3369 /* No need to send echo on newly established connections */
3370 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
3374 rc = smb2_plain_req_init(SMB2_ECHO, NULL, (void **)&req, &total_len);
3378 req->sync_hdr.CreditRequest = cpu_to_le16(1);
3380 iov[0].iov_len = total_len;
3381 iov[0].iov_base = (char *)req;
3383 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
3384 server, CIFS_ECHO_OP, NULL);
3386 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
3388 cifs_small_buf_release(req);
3393 SMB2_flush_free(struct smb_rqst *rqst)
3395 if (rqst && rqst->rq_iov)
3396 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
3400 SMB2_flush_init(const unsigned int xid, struct smb_rqst *rqst,
3401 struct cifs_tcon *tcon, u64 persistent_fid, u64 volatile_fid)
3403 struct smb2_flush_req *req;
3404 struct kvec *iov = rqst->rq_iov;
3405 unsigned int total_len;
3408 rc = smb2_plain_req_init(SMB2_FLUSH, tcon, (void **) &req, &total_len);
3412 req->PersistentFileId = persistent_fid;
3413 req->VolatileFileId = volatile_fid;
3415 iov[0].iov_base = (char *)req;
3416 iov[0].iov_len = total_len;
3422 SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
3425 struct cifs_ses *ses = tcon->ses;
3426 struct smb_rqst rqst;
3428 struct kvec rsp_iov = {NULL, 0};
3429 int resp_buftype = CIFS_NO_BUFFER;
3433 cifs_dbg(FYI, "flush\n");
3434 if (!ses || !(ses->server))
3437 if (smb3_encryption_required(tcon))
3438 flags |= CIFS_TRANSFORM_REQ;
3440 memset(&rqst, 0, sizeof(struct smb_rqst));
3441 memset(&iov, 0, sizeof(iov));
3445 rc = SMB2_flush_init(xid, &rqst, tcon, persistent_fid, volatile_fid);
3449 trace_smb3_flush_enter(xid, persistent_fid, tcon->tid, ses->Suid);
3450 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
3453 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
3454 trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid,
3457 trace_smb3_flush_done(xid, persistent_fid, tcon->tid,
3461 SMB2_flush_free(&rqst);
3462 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
3467 * To form a chain of read requests, any read requests after the first should
3468 * have the end_of_chain boolean set to true.
3471 smb2_new_read_req(void **buf, unsigned int *total_len,
3472 struct cifs_io_parms *io_parms, struct cifs_readdata *rdata,
3473 unsigned int remaining_bytes, int request_type)
3476 struct smb2_read_plain_req *req = NULL;
3477 struct smb2_sync_hdr *shdr;
3478 struct TCP_Server_Info *server;
3480 rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
3485 server = io_parms->tcon->ses->server;
3487 return -ECONNABORTED;
3489 shdr = &req->sync_hdr;
3490 shdr->ProcessId = cpu_to_le32(io_parms->pid);
3492 req->PersistentFileId = io_parms->persistent_fid;
3493 req->VolatileFileId = io_parms->volatile_fid;
3494 req->ReadChannelInfoOffset = 0; /* reserved */
3495 req->ReadChannelInfoLength = 0; /* reserved */
3496 req->Channel = 0; /* reserved */
3497 req->MinimumCount = 0;
3498 req->Length = cpu_to_le32(io_parms->length);
3499 req->Offset = cpu_to_le64(io_parms->offset);
3501 trace_smb3_read_enter(0 /* xid */,
3502 io_parms->persistent_fid,
3503 io_parms->tcon->tid, io_parms->tcon->ses->Suid,
3504 io_parms->offset, io_parms->length);
3505 #ifdef CONFIG_CIFS_SMB_DIRECT
3507 * If we want to do a RDMA write, fill in and append
3508 * smbd_buffer_descriptor_v1 to the end of read request
3510 if (server->rdma && rdata && !server->sign &&
3511 rdata->bytes >= server->smbd_conn->rdma_readwrite_threshold) {
3513 struct smbd_buffer_descriptor_v1 *v1;
3514 bool need_invalidate =
3515 io_parms->tcon->ses->server->dialect == SMB30_PROT_ID;
3517 rdata->mr = smbd_register_mr(
3518 server->smbd_conn, rdata->pages,
3519 rdata->nr_pages, rdata->page_offset,
3520 rdata->tailsz, true, need_invalidate);
3524 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
3525 if (need_invalidate)
3526 req->Channel = SMB2_CHANNEL_RDMA_V1;
3527 req->ReadChannelInfoOffset =
3528 cpu_to_le16(offsetof(struct smb2_read_plain_req, Buffer));
3529 req->ReadChannelInfoLength =
3530 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
3531 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
3532 v1->offset = cpu_to_le64(rdata->mr->mr->iova);
3533 v1->token = cpu_to_le32(rdata->mr->mr->rkey);
3534 v1->length = cpu_to_le32(rdata->mr->mr->length);
3536 *total_len += sizeof(*v1) - 1;
3539 if (request_type & CHAINED_REQUEST) {
3540 if (!(request_type & END_OF_CHAIN)) {
3541 /* next 8-byte aligned request */
3542 *total_len = DIV_ROUND_UP(*total_len, 8) * 8;
3543 shdr->NextCommand = cpu_to_le32(*total_len);
3544 } else /* END_OF_CHAIN */
3545 shdr->NextCommand = 0;
3546 if (request_type & RELATED_REQUEST) {
3547 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
3549 * Related requests use info from previous read request
3552 shdr->SessionId = 0xFFFFFFFF;
3553 shdr->TreeId = 0xFFFFFFFF;
3554 req->PersistentFileId = 0xFFFFFFFF;
3555 req->VolatileFileId = 0xFFFFFFFF;
3558 if (remaining_bytes > io_parms->length)
3559 req->RemainingBytes = cpu_to_le32(remaining_bytes);
3561 req->RemainingBytes = 0;
3568 smb2_readv_callback(struct mid_q_entry *mid)
3570 struct cifs_readdata *rdata = mid->callback_data;
3571 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
3572 struct TCP_Server_Info *server = tcon->ses->server;
3573 struct smb2_sync_hdr *shdr =
3574 (struct smb2_sync_hdr *)rdata->iov[0].iov_base;
3575 struct cifs_credits credits = { .value = 0, .instance = 0 };
3576 struct smb_rqst rqst = { .rq_iov = &rdata->iov[1],
3578 .rq_pages = rdata->pages,
3579 .rq_offset = rdata->page_offset,
3580 .rq_npages = rdata->nr_pages,
3581 .rq_pagesz = rdata->pagesz,
3582 .rq_tailsz = rdata->tailsz };
3584 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
3585 __func__, mid->mid, mid->mid_state, rdata->result,
3588 switch (mid->mid_state) {
3589 case MID_RESPONSE_RECEIVED:
3590 credits.value = le16_to_cpu(shdr->CreditRequest);
3591 credits.instance = server->reconnect_instance;
3592 /* result already set, check signature */
3593 if (server->sign && !mid->decrypted) {
3596 rc = smb2_verify_signature(&rqst, server);
3598 cifs_tcon_dbg(VFS, "SMB signature verification returned error = %d\n",
3601 /* FIXME: should this be counted toward the initiating task? */
3602 task_io_account_read(rdata->got_bytes);
3603 cifs_stats_bytes_read(tcon, rdata->got_bytes);
3605 case MID_REQUEST_SUBMITTED:
3606 case MID_RETRY_NEEDED:
3607 rdata->result = -EAGAIN;
3608 if (server->sign && rdata->got_bytes)
3609 /* reset bytes number since we can not check a sign */
3610 rdata->got_bytes = 0;
3611 /* FIXME: should this be counted toward the initiating task? */
3612 task_io_account_read(rdata->got_bytes);
3613 cifs_stats_bytes_read(tcon, rdata->got_bytes);
3615 case MID_RESPONSE_MALFORMED:
3616 credits.value = le16_to_cpu(shdr->CreditRequest);
3617 credits.instance = server->reconnect_instance;
3620 rdata->result = -EIO;
3622 #ifdef CONFIG_CIFS_SMB_DIRECT
3624 * If this rdata has a memmory registered, the MR can be freed
3625 * MR needs to be freed as soon as I/O finishes to prevent deadlock
3626 * because they have limited number and are used for future I/Os
3629 smbd_deregister_mr(rdata->mr);
3633 if (rdata->result && rdata->result != -ENODATA) {
3634 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
3635 trace_smb3_read_err(0 /* xid */,
3636 rdata->cfile->fid.persistent_fid,
3637 tcon->tid, tcon->ses->Suid, rdata->offset,
3638 rdata->bytes, rdata->result);
3640 trace_smb3_read_done(0 /* xid */,
3641 rdata->cfile->fid.persistent_fid,
3642 tcon->tid, tcon->ses->Suid,
3643 rdata->offset, rdata->got_bytes);
3645 queue_work(cifsiod_wq, &rdata->work);
3646 DeleteMidQEntry(mid);
3647 add_credits(server, &credits, 0);
3650 /* smb2_async_readv - send an async read, and set up mid to handle result */
3652 smb2_async_readv(struct cifs_readdata *rdata)
3656 struct smb2_sync_hdr *shdr;
3657 struct cifs_io_parms io_parms;
3658 struct smb_rqst rqst = { .rq_iov = rdata->iov,
3660 struct TCP_Server_Info *server;
3661 unsigned int total_len;
3663 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
3664 __func__, rdata->offset, rdata->bytes);
3666 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
3667 io_parms.offset = rdata->offset;
3668 io_parms.length = rdata->bytes;
3669 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
3670 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
3671 io_parms.pid = rdata->pid;
3673 server = io_parms.tcon->ses->server;
3675 rc = smb2_new_read_req(
3676 (void **) &buf, &total_len, &io_parms, rdata, 0, 0);
3680 if (smb3_encryption_required(io_parms.tcon))
3681 flags |= CIFS_TRANSFORM_REQ;
3683 rdata->iov[0].iov_base = buf;
3684 rdata->iov[0].iov_len = total_len;
3686 shdr = (struct smb2_sync_hdr *)buf;
3688 if (rdata->credits.value > 0) {
3689 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
3690 SMB2_MAX_BUFFER_SIZE));
3691 shdr->CreditRequest =
3692 cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 1);
3694 rc = adjust_credits(server, &rdata->credits, rdata->bytes);
3696 goto async_readv_out;
3698 flags |= CIFS_HAS_CREDITS;
3701 kref_get(&rdata->refcount);
3702 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
3703 cifs_readv_receive, smb2_readv_callback,
3704 smb3_handle_read_data, rdata, flags,
3707 kref_put(&rdata->refcount, cifs_readdata_release);
3708 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
3709 trace_smb3_read_err(0 /* xid */, io_parms.persistent_fid,
3711 io_parms.tcon->ses->Suid,
3712 io_parms.offset, io_parms.length, rc);
3716 cifs_small_buf_release(buf);
3721 SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
3722 unsigned int *nbytes, char **buf, int *buf_type)
3724 struct smb_rqst rqst;
3725 int resp_buftype, rc;
3726 struct smb2_read_plain_req *req = NULL;
3727 struct smb2_read_rsp *rsp = NULL;
3729 struct kvec rsp_iov;
3730 unsigned int total_len;
3731 int flags = CIFS_LOG_ERROR;
3732 struct cifs_ses *ses = io_parms->tcon->ses;
3735 rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0);
3739 if (smb3_encryption_required(io_parms->tcon))
3740 flags |= CIFS_TRANSFORM_REQ;
3742 iov[0].iov_base = (char *)req;
3743 iov[0].iov_len = total_len;
3745 memset(&rqst, 0, sizeof(struct smb_rqst));
3749 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
3750 rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
3753 if (rc != -ENODATA) {
3754 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
3755 cifs_dbg(VFS, "Send error in read = %d\n", rc);
3756 trace_smb3_read_err(xid, req->PersistentFileId,
3757 io_parms->tcon->tid, ses->Suid,
3758 io_parms->offset, io_parms->length,
3761 trace_smb3_read_done(xid, req->PersistentFileId,
3762 io_parms->tcon->tid, ses->Suid,
3763 io_parms->offset, 0);
3764 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
3765 cifs_small_buf_release(req);
3766 return rc == -ENODATA ? 0 : rc;
3768 trace_smb3_read_done(xid, req->PersistentFileId,
3769 io_parms->tcon->tid, ses->Suid,
3770 io_parms->offset, io_parms->length);
3772 cifs_small_buf_release(req);
3774 *nbytes = le32_to_cpu(rsp->DataLength);
3775 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
3776 (*nbytes > io_parms->length)) {
3777 cifs_dbg(FYI, "bad length %d for count %d\n",
3778 *nbytes, io_parms->length);
3784 memcpy(*buf, (char *)rsp + rsp->DataOffset, *nbytes);
3785 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
3786 } else if (resp_buftype != CIFS_NO_BUFFER) {
3787 *buf = rsp_iov.iov_base;
3788 if (resp_buftype == CIFS_SMALL_BUFFER)
3789 *buf_type = CIFS_SMALL_BUFFER;
3790 else if (resp_buftype == CIFS_LARGE_BUFFER)
3791 *buf_type = CIFS_LARGE_BUFFER;
3797 * Check the mid_state and signature on received buffer (if any), and queue the
3798 * workqueue completion task.
3801 smb2_writev_callback(struct mid_q_entry *mid)
3803 struct cifs_writedata *wdata = mid->callback_data;
3804 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
3805 struct TCP_Server_Info *server = tcon->ses->server;
3806 unsigned int written;
3807 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
3808 struct cifs_credits credits = { .value = 0, .instance = 0 };
3810 switch (mid->mid_state) {
3811 case MID_RESPONSE_RECEIVED:
3812 credits.value = le16_to_cpu(rsp->sync_hdr.CreditRequest);
3813 credits.instance = server->reconnect_instance;
3814 wdata->result = smb2_check_receive(mid, server, 0);
3815 if (wdata->result != 0)
3818 written = le32_to_cpu(rsp->DataLength);
3820 * Mask off high 16 bits when bytes written as returned
3821 * by the server is greater than bytes requested by the
3822 * client. OS/2 servers are known to set incorrect
3825 if (written > wdata->bytes)
3828 if (written < wdata->bytes)
3829 wdata->result = -ENOSPC;
3831 wdata->bytes = written;
3833 case MID_REQUEST_SUBMITTED:
3834 case MID_RETRY_NEEDED:
3835 wdata->result = -EAGAIN;
3837 case MID_RESPONSE_MALFORMED:
3838 credits.value = le16_to_cpu(rsp->sync_hdr.CreditRequest);
3839 credits.instance = server->reconnect_instance;
3842 wdata->result = -EIO;
3845 #ifdef CONFIG_CIFS_SMB_DIRECT
3847 * If this wdata has a memory registered, the MR can be freed
3848 * The number of MRs available is limited, it's important to recover
3849 * used MR as soon as I/O is finished. Hold MR longer in the later
3850 * I/O process can possibly result in I/O deadlock due to lack of MR
3851 * to send request on I/O retry
3854 smbd_deregister_mr(wdata->mr);
3858 if (wdata->result) {
3859 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
3860 trace_smb3_write_err(0 /* no xid */,
3861 wdata->cfile->fid.persistent_fid,
3862 tcon->tid, tcon->ses->Suid, wdata->offset,
3863 wdata->bytes, wdata->result);
3865 trace_smb3_write_done(0 /* no xid */,
3866 wdata->cfile->fid.persistent_fid,
3867 tcon->tid, tcon->ses->Suid,
3868 wdata->offset, wdata->bytes);
3870 queue_work(cifsiod_wq, &wdata->work);
3871 DeleteMidQEntry(mid);
3872 add_credits(server, &credits, 0);
3875 /* smb2_async_writev - send an async write, and set up mid to handle result */
3877 smb2_async_writev(struct cifs_writedata *wdata,
3878 void (*release)(struct kref *kref))
3880 int rc = -EACCES, flags = 0;
3881 struct smb2_write_req *req = NULL;
3882 struct smb2_sync_hdr *shdr;
3883 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
3884 struct TCP_Server_Info *server = tcon->ses->server;
3886 struct smb_rqst rqst = { };
3887 unsigned int total_len;
3889 rc = smb2_plain_req_init(SMB2_WRITE, tcon, (void **) &req, &total_len);
3893 if (smb3_encryption_required(tcon))
3894 flags |= CIFS_TRANSFORM_REQ;
3896 shdr = (struct smb2_sync_hdr *)req;
3897 shdr->ProcessId = cpu_to_le32(wdata->cfile->pid);
3899 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
3900 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
3901 req->WriteChannelInfoOffset = 0;
3902 req->WriteChannelInfoLength = 0;
3904 req->Offset = cpu_to_le64(wdata->offset);
3905 req->DataOffset = cpu_to_le16(
3906 offsetof(struct smb2_write_req, Buffer));
3907 req->RemainingBytes = 0;
3909 trace_smb3_write_enter(0 /* xid */, wdata->cfile->fid.persistent_fid,
3910 tcon->tid, tcon->ses->Suid, wdata->offset, wdata->bytes);
3911 #ifdef CONFIG_CIFS_SMB_DIRECT
3913 * If we want to do a server RDMA read, fill in and append
3914 * smbd_buffer_descriptor_v1 to the end of write request
3916 if (server->rdma && !server->sign && wdata->bytes >=
3917 server->smbd_conn->rdma_readwrite_threshold) {
3919 struct smbd_buffer_descriptor_v1 *v1;
3920 bool need_invalidate = server->dialect == SMB30_PROT_ID;
3922 wdata->mr = smbd_register_mr(
3923 server->smbd_conn, wdata->pages,
3924 wdata->nr_pages, wdata->page_offset,
3925 wdata->tailsz, false, need_invalidate);
3928 goto async_writev_out;
3931 req->DataOffset = 0;
3932 if (wdata->nr_pages > 1)
3933 req->RemainingBytes =
3935 (wdata->nr_pages - 1) * wdata->pagesz -
3936 wdata->page_offset + wdata->tailsz
3939 req->RemainingBytes = cpu_to_le32(wdata->tailsz);
3940 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
3941 if (need_invalidate)
3942 req->Channel = SMB2_CHANNEL_RDMA_V1;
3943 req->WriteChannelInfoOffset =
3944 cpu_to_le16(offsetof(struct smb2_write_req, Buffer));
3945 req->WriteChannelInfoLength =
3946 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
3947 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
3948 v1->offset = cpu_to_le64(wdata->mr->mr->iova);
3949 v1->token = cpu_to_le32(wdata->mr->mr->rkey);
3950 v1->length = cpu_to_le32(wdata->mr->mr->length);
3953 iov[0].iov_len = total_len - 1;
3954 iov[0].iov_base = (char *)req;
3958 rqst.rq_pages = wdata->pages;
3959 rqst.rq_offset = wdata->page_offset;
3960 rqst.rq_npages = wdata->nr_pages;
3961 rqst.rq_pagesz = wdata->pagesz;
3962 rqst.rq_tailsz = wdata->tailsz;
3963 #ifdef CONFIG_CIFS_SMB_DIRECT
3965 iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1);
3969 cifs_dbg(FYI, "async write at %llu %u bytes\n",
3970 wdata->offset, wdata->bytes);
3972 #ifdef CONFIG_CIFS_SMB_DIRECT
3973 /* For RDMA read, I/O size is in RemainingBytes not in Length */
3975 req->Length = cpu_to_le32(wdata->bytes);
3977 req->Length = cpu_to_le32(wdata->bytes);
3980 if (wdata->credits.value > 0) {
3981 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
3982 SMB2_MAX_BUFFER_SIZE));
3983 shdr->CreditRequest =
3984 cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 1);
3986 rc = adjust_credits(server, &wdata->credits, wdata->bytes);
3988 goto async_writev_out;
3990 flags |= CIFS_HAS_CREDITS;
3993 kref_get(&wdata->refcount);
3994 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
3995 wdata, flags, &wdata->credits);
3998 trace_smb3_write_err(0 /* no xid */, req->PersistentFileId,
3999 tcon->tid, tcon->ses->Suid, wdata->offset,
4001 kref_put(&wdata->refcount, release);
4002 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
4006 cifs_small_buf_release(req);
4011 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
4012 * The length field from io_parms must be at least 1 and indicates a number of
4013 * elements with data to write that begins with position 1 in iov array. All
4014 * data length is specified by count.
4017 SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
4018 unsigned int *nbytes, struct kvec *iov, int n_vec)
4020 struct smb_rqst rqst;
4022 struct smb2_write_req *req = NULL;
4023 struct smb2_write_rsp *rsp = NULL;
4025 struct kvec rsp_iov;
4027 unsigned int total_len;
4034 rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, (void **) &req,
4039 if (io_parms->tcon->ses->server == NULL)
4040 return -ECONNABORTED;
4042 if (smb3_encryption_required(io_parms->tcon))
4043 flags |= CIFS_TRANSFORM_REQ;
4045 req->sync_hdr.ProcessId = cpu_to_le32(io_parms->pid);
4047 req->PersistentFileId = io_parms->persistent_fid;
4048 req->VolatileFileId = io_parms->volatile_fid;
4049 req->WriteChannelInfoOffset = 0;
4050 req->WriteChannelInfoLength = 0;
4052 req->Length = cpu_to_le32(io_parms->length);
4053 req->Offset = cpu_to_le64(io_parms->offset);
4054 req->DataOffset = cpu_to_le16(
4055 offsetof(struct smb2_write_req, Buffer));
4056 req->RemainingBytes = 0;
4058 trace_smb3_write_enter(xid, io_parms->persistent_fid,
4059 io_parms->tcon->tid, io_parms->tcon->ses->Suid,
4060 io_parms->offset, io_parms->length);
4062 iov[0].iov_base = (char *)req;
4064 iov[0].iov_len = total_len - 1;
4066 memset(&rqst, 0, sizeof(struct smb_rqst));
4068 rqst.rq_nvec = n_vec + 1;
4070 rc = cifs_send_recv(xid, io_parms->tcon->ses, &rqst,
4071 &resp_buftype, flags, &rsp_iov);
4072 rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
4075 trace_smb3_write_err(xid, req->PersistentFileId,
4076 io_parms->tcon->tid,
4077 io_parms->tcon->ses->Suid,
4078 io_parms->offset, io_parms->length, rc);
4079 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
4080 cifs_dbg(VFS, "Send error in write = %d\n", rc);
4082 *nbytes = le32_to_cpu(rsp->DataLength);
4083 trace_smb3_write_done(xid, req->PersistentFileId,
4084 io_parms->tcon->tid,
4085 io_parms->tcon->ses->Suid,
4086 io_parms->offset, *nbytes);
4089 cifs_small_buf_release(req);
4090 free_rsp_buf(resp_buftype, rsp);
4095 num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
4098 unsigned int entrycount = 0;
4099 unsigned int next_offset = 0;
4101 FILE_DIRECTORY_INFO *dir_info;
4103 if (bufstart == NULL)
4106 entryptr = bufstart;
4109 if (entryptr + next_offset < entryptr ||
4110 entryptr + next_offset > end_of_buf ||
4111 entryptr + next_offset + size > end_of_buf) {
4112 cifs_dbg(VFS, "malformed search entry would overflow\n");
4116 entryptr = entryptr + next_offset;
4117 dir_info = (FILE_DIRECTORY_INFO *)entryptr;
4119 len = le32_to_cpu(dir_info->FileNameLength);
4120 if (entryptr + len < entryptr ||
4121 entryptr + len > end_of_buf ||
4122 entryptr + len + size > end_of_buf) {
4123 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
4128 *lastentry = entryptr;
4131 next_offset = le32_to_cpu(dir_info->NextEntryOffset);
4143 SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
4144 u64 persistent_fid, u64 volatile_fid, int index,
4145 struct cifs_search_info *srch_inf)
4147 struct smb_rqst rqst;
4148 struct smb2_query_directory_req *req;
4149 struct smb2_query_directory_rsp *rsp = NULL;
4151 struct kvec rsp_iov;
4154 int resp_buftype = CIFS_NO_BUFFER;
4155 unsigned char *bufptr;
4156 struct TCP_Server_Info *server;
4157 struct cifs_ses *ses = tcon->ses;
4158 __le16 asteriks = cpu_to_le16('*');
4160 unsigned int output_size = CIFSMaxBufSize;
4161 size_t info_buf_size;
4163 unsigned int total_len;
4165 if (ses && (ses->server))
4166 server = ses->server;
4170 rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req,
4175 if (smb3_encryption_required(tcon))
4176 flags |= CIFS_TRANSFORM_REQ;
4178 switch (srch_inf->info_level) {
4179 case SMB_FIND_FILE_DIRECTORY_INFO:
4180 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
4181 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
4183 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
4184 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
4185 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
4188 cifs_tcon_dbg(VFS, "info level %u isn't supported\n",
4189 srch_inf->info_level);
4194 req->FileIndex = cpu_to_le32(index);
4195 req->PersistentFileId = persistent_fid;
4196 req->VolatileFileId = volatile_fid;
4199 bufptr = req->Buffer;
4200 memcpy(bufptr, &asteriks, len);
4202 req->FileNameOffset =
4203 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1);
4204 req->FileNameLength = cpu_to_le16(len);
4206 * BB could be 30 bytes or so longer if we used SMB2 specific
4207 * buffer lengths, but this is safe and close enough.
4209 output_size = min_t(unsigned int, output_size, server->maxBuf);
4210 output_size = min_t(unsigned int, output_size, 2 << 15);
4211 req->OutputBufferLength = cpu_to_le32(output_size);
4213 iov[0].iov_base = (char *)req;
4215 iov[0].iov_len = total_len - 1;
4217 iov[1].iov_base = (char *)(req->Buffer);
4218 iov[1].iov_len = len;
4220 memset(&rqst, 0, sizeof(struct smb_rqst));
4224 trace_smb3_query_dir_enter(xid, persistent_fid, tcon->tid,
4225 tcon->ses->Suid, index, output_size);
4227 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
4228 cifs_small_buf_release(req);
4229 rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
4232 if (rc == -ENODATA &&
4233 rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
4234 trace_smb3_query_dir_done(xid, persistent_fid,
4235 tcon->tid, tcon->ses->Suid, index, 0);
4236 srch_inf->endOfSearch = true;
4239 trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
4240 tcon->ses->Suid, index, 0, rc);
4241 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
4246 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
4247 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
4250 trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
4251 tcon->ses->Suid, index, 0, rc);
4255 srch_inf->unicode = true;
4257 if (srch_inf->ntwrk_buf_start) {
4258 if (srch_inf->smallBuf)
4259 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
4261 cifs_buf_release(srch_inf->ntwrk_buf_start);
4263 srch_inf->ntwrk_buf_start = (char *)rsp;
4264 srch_inf->srch_entries_start = srch_inf->last_entry =
4265 (char *)rsp + le16_to_cpu(rsp->OutputBufferOffset);
4266 end_of_smb = rsp_iov.iov_len + (char *)rsp;
4267 srch_inf->entries_in_buffer =
4268 num_entries(srch_inf->srch_entries_start, end_of_smb,
4269 &srch_inf->last_entry, info_buf_size);
4270 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
4271 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
4272 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
4273 srch_inf->srch_entries_start, srch_inf->last_entry);
4274 if (resp_buftype == CIFS_LARGE_BUFFER)
4275 srch_inf->smallBuf = false;
4276 else if (resp_buftype == CIFS_SMALL_BUFFER)
4277 srch_inf->smallBuf = true;
4279 cifs_tcon_dbg(VFS, "illegal search buffer type\n");
4281 trace_smb3_query_dir_done(xid, persistent_fid, tcon->tid,
4282 tcon->ses->Suid, index, srch_inf->entries_in_buffer);
4286 free_rsp_buf(resp_buftype, rsp);
4291 SMB2_set_info_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
4292 u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
4293 u8 info_type, u32 additional_info,
4294 void **data, unsigned int *size)
4296 struct smb2_set_info_req *req;
4297 struct kvec *iov = rqst->rq_iov;
4298 unsigned int i, total_len;
4301 rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, (void **) &req, &total_len);
4305 req->sync_hdr.ProcessId = cpu_to_le32(pid);
4306 req->InfoType = info_type;
4307 req->FileInfoClass = info_class;
4308 req->PersistentFileId = persistent_fid;
4309 req->VolatileFileId = volatile_fid;
4310 req->AdditionalInformation = cpu_to_le32(additional_info);
4313 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1);
4314 req->BufferLength = cpu_to_le32(*size);
4316 memcpy(req->Buffer, *data, *size);
4319 iov[0].iov_base = (char *)req;
4321 iov[0].iov_len = total_len - 1;
4323 for (i = 1; i < rqst->rq_nvec; i++) {
4324 le32_add_cpu(&req->BufferLength, size[i]);
4325 iov[i].iov_base = (char *)data[i];
4326 iov[i].iov_len = size[i];
4333 SMB2_set_info_free(struct smb_rqst *rqst)
4335 if (rqst && rqst->rq_iov)
4336 cifs_buf_release(rqst->rq_iov[0].iov_base); /* request */
4340 send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
4341 u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
4342 u8 info_type, u32 additional_info, unsigned int num,
4343 void **data, unsigned int *size)
4345 struct smb_rqst rqst;
4346 struct smb2_set_info_rsp *rsp = NULL;
4348 struct kvec rsp_iov;
4351 struct cifs_ses *ses = tcon->ses;
4354 if (!ses || !(ses->server))
4360 if (smb3_encryption_required(tcon))
4361 flags |= CIFS_TRANSFORM_REQ;
4363 iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL);
4367 memset(&rqst, 0, sizeof(struct smb_rqst));
4371 rc = SMB2_set_info_init(tcon, &rqst, persistent_fid, volatile_fid, pid,
4372 info_class, info_type, additional_info,
4380 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
4382 SMB2_set_info_free(&rqst);
4383 rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
4386 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
4387 trace_smb3_set_info_err(xid, persistent_fid, tcon->tid,
4388 ses->Suid, info_class, (__u32)info_type, rc);
4391 free_rsp_buf(resp_buftype, rsp);
4397 SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
4398 u64 volatile_fid, u32 pid, __le64 *eof)
4400 struct smb2_file_eof_info info;
4404 info.EndOfFile = *eof;
4407 size = sizeof(struct smb2_file_eof_info);
4409 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
4410 pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE,
4411 0, 1, &data, &size);
4415 SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
4416 u64 persistent_fid, u64 volatile_fid,
4417 struct cifs_ntsd *pnntsd, int pacllen, int aclflag)
4419 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
4420 current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag,
4421 1, (void **)&pnntsd, &pacllen);
4425 SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
4426 u64 persistent_fid, u64 volatile_fid,
4427 struct smb2_file_full_ea_info *buf, int len)
4429 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
4430 current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE,
4431 0, 1, (void **)&buf, &len);
4435 SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
4436 const u64 persistent_fid, const u64 volatile_fid,
4439 struct smb_rqst rqst;
4441 struct smb2_oplock_break *req = NULL;
4442 struct cifs_ses *ses = tcon->ses;
4443 int flags = CIFS_OBREAK_OP;
4444 unsigned int total_len;
4446 struct kvec rsp_iov;
4449 cifs_dbg(FYI, "SMB2_oplock_break\n");
4450 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
4455 if (smb3_encryption_required(tcon))
4456 flags |= CIFS_TRANSFORM_REQ;
4458 req->VolatileFid = volatile_fid;
4459 req->PersistentFid = persistent_fid;
4460 req->OplockLevel = oplock_level;
4461 req->sync_hdr.CreditRequest = cpu_to_le16(1);
4463 flags |= CIFS_NO_RSP_BUF;
4465 iov[0].iov_base = (char *)req;
4466 iov[0].iov_len = total_len;
4468 memset(&rqst, 0, sizeof(struct smb_rqst));
4472 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
4473 cifs_small_buf_release(req);
4476 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
4477 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
4484 smb2_copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
4485 struct kstatfs *kst)
4487 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
4488 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
4489 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
4490 kst->f_bfree = kst->f_bavail =
4491 le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
4496 copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO *response_data,
4497 struct kstatfs *kst)
4499 kst->f_bsize = le32_to_cpu(response_data->BlockSize);
4500 kst->f_blocks = le64_to_cpu(response_data->TotalBlocks);
4501 kst->f_bfree = le64_to_cpu(response_data->BlocksAvail);
4502 if (response_data->UserBlocksAvail == cpu_to_le64(-1))
4503 kst->f_bavail = kst->f_bfree;
4505 kst->f_bavail = le64_to_cpu(response_data->UserBlocksAvail);
4506 if (response_data->TotalFileNodes != cpu_to_le64(-1))
4507 kst->f_files = le64_to_cpu(response_data->TotalFileNodes);
4508 if (response_data->FreeFileNodes != cpu_to_le64(-1))
4509 kst->f_ffree = le64_to_cpu(response_data->FreeFileNodes);
4515 build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
4516 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
4519 struct smb2_query_info_req *req;
4520 unsigned int total_len;
4522 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
4524 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
4527 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
4532 req->InfoType = SMB2_O_INFO_FILESYSTEM;
4533 req->FileInfoClass = level;
4534 req->PersistentFileId = persistent_fid;
4535 req->VolatileFileId = volatile_fid;
4537 req->InputBufferOffset =
4538 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1);
4539 req->OutputBufferLength = cpu_to_le32(
4540 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1);
4542 iov->iov_base = (char *)req;
4543 iov->iov_len = total_len;
4548 SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon,
4549 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
4551 struct smb_rqst rqst;
4552 struct smb2_query_info_rsp *rsp = NULL;
4554 struct kvec rsp_iov;
4557 struct cifs_ses *ses = tcon->ses;
4558 FILE_SYSTEM_POSIX_INFO *info = NULL;
4561 rc = build_qfs_info_req(&iov, tcon, FS_POSIX_INFORMATION,
4562 sizeof(FILE_SYSTEM_POSIX_INFO),
4563 persistent_fid, volatile_fid);
4567 if (smb3_encryption_required(tcon))
4568 flags |= CIFS_TRANSFORM_REQ;
4570 memset(&rqst, 0, sizeof(struct smb_rqst));
4574 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
4575 cifs_small_buf_release(iov.iov_base);
4577 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
4578 goto posix_qfsinf_exit;
4580 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
4582 info = (FILE_SYSTEM_POSIX_INFO *)(
4583 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
4584 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
4585 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
4586 sizeof(FILE_SYSTEM_POSIX_INFO));
4588 copy_posix_fs_info_to_kstatfs(info, fsdata);
4591 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
4596 SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
4597 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
4599 struct smb_rqst rqst;
4600 struct smb2_query_info_rsp *rsp = NULL;
4602 struct kvec rsp_iov;
4605 struct cifs_ses *ses = tcon->ses;
4606 struct smb2_fs_full_size_info *info = NULL;
4609 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
4610 sizeof(struct smb2_fs_full_size_info),
4611 persistent_fid, volatile_fid);
4615 if (smb3_encryption_required(tcon))
4616 flags |= CIFS_TRANSFORM_REQ;
4618 memset(&rqst, 0, sizeof(struct smb_rqst));
4622 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
4623 cifs_small_buf_release(iov.iov_base);
4625 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
4628 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
4630 info = (struct smb2_fs_full_size_info *)(
4631 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
4632 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
4633 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
4634 sizeof(struct smb2_fs_full_size_info));
4636 smb2_copy_fs_info_to_kstatfs(info, fsdata);
4639 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
4644 SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
4645 u64 persistent_fid, u64 volatile_fid, int level)
4647 struct smb_rqst rqst;
4648 struct smb2_query_info_rsp *rsp = NULL;
4650 struct kvec rsp_iov;
4652 int resp_buftype, max_len, min_len;
4653 struct cifs_ses *ses = tcon->ses;
4654 unsigned int rsp_len, offset;
4657 if (level == FS_DEVICE_INFORMATION) {
4658 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
4659 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
4660 } else if (level == FS_ATTRIBUTE_INFORMATION) {
4661 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
4662 min_len = MIN_FS_ATTR_INFO_SIZE;
4663 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
4664 max_len = sizeof(struct smb3_fs_ss_info);
4665 min_len = sizeof(struct smb3_fs_ss_info);
4666 } else if (level == FS_VOLUME_INFORMATION) {
4667 max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN;
4668 min_len = sizeof(struct smb3_fs_vol_info);
4670 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
4674 rc = build_qfs_info_req(&iov, tcon, level, max_len,
4675 persistent_fid, volatile_fid);
4679 if (smb3_encryption_required(tcon))
4680 flags |= CIFS_TRANSFORM_REQ;
4682 memset(&rqst, 0, sizeof(struct smb_rqst));
4686 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
4687 cifs_small_buf_release(iov.iov_base);
4689 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
4692 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
4694 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
4695 offset = le16_to_cpu(rsp->OutputBufferOffset);
4696 rc = smb2_validate_iov(offset, rsp_len, &rsp_iov, min_len);
4700 if (level == FS_ATTRIBUTE_INFORMATION)
4701 memcpy(&tcon->fsAttrInfo, offset
4702 + (char *)rsp, min_t(unsigned int,
4704 else if (level == FS_DEVICE_INFORMATION)
4705 memcpy(&tcon->fsDevInfo, offset
4706 + (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO));
4707 else if (level == FS_SECTOR_SIZE_INFORMATION) {
4708 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
4709 (offset + (char *)rsp);
4710 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
4711 tcon->perf_sector_size =
4712 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
4713 } else if (level == FS_VOLUME_INFORMATION) {
4714 struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *)
4715 (offset + (char *)rsp);
4716 tcon->vol_serial_number = vol_info->VolumeSerialNumber;
4717 tcon->vol_create_time = vol_info->VolumeCreationTime;
4721 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
4726 smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
4727 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
4728 const __u32 num_lock, struct smb2_lock_element *buf)
4730 struct smb_rqst rqst;
4732 struct smb2_lock_req *req = NULL;
4734 struct kvec rsp_iov;
4737 int flags = CIFS_NO_RSP_BUF;
4738 unsigned int total_len;
4740 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
4742 rc = smb2_plain_req_init(SMB2_LOCK, tcon, (void **) &req, &total_len);
4746 if (smb3_encryption_required(tcon))
4747 flags |= CIFS_TRANSFORM_REQ;
4749 req->sync_hdr.ProcessId = cpu_to_le32(pid);
4750 req->LockCount = cpu_to_le16(num_lock);
4752 req->PersistentFileId = persist_fid;
4753 req->VolatileFileId = volatile_fid;
4755 count = num_lock * sizeof(struct smb2_lock_element);
4757 iov[0].iov_base = (char *)req;
4758 iov[0].iov_len = total_len - sizeof(struct smb2_lock_element);
4759 iov[1].iov_base = (char *)buf;
4760 iov[1].iov_len = count;
4762 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
4764 memset(&rqst, 0, sizeof(struct smb_rqst));
4768 rc = cifs_send_recv(xid, tcon->ses, &rqst, &resp_buf_type, flags,
4770 cifs_small_buf_release(req);
4772 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
4773 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
4774 trace_smb3_lock_err(xid, persist_fid, tcon->tid,
4775 tcon->ses->Suid, rc);
4782 SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
4783 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
4784 const __u64 length, const __u64 offset, const __u32 lock_flags,
4787 struct smb2_lock_element lock;
4789 lock.Offset = cpu_to_le64(offset);
4790 lock.Length = cpu_to_le64(length);
4791 lock.Flags = cpu_to_le32(lock_flags);
4792 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
4793 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
4795 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
4799 SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
4800 __u8 *lease_key, const __le32 lease_state)
4802 struct smb_rqst rqst;
4804 struct smb2_lease_ack *req = NULL;
4805 struct cifs_ses *ses = tcon->ses;
4806 int flags = CIFS_OBREAK_OP;
4807 unsigned int total_len;
4809 struct kvec rsp_iov;
4811 __u64 *please_key_high;
4812 __u64 *please_key_low;
4814 cifs_dbg(FYI, "SMB2_lease_break\n");
4815 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
4820 if (smb3_encryption_required(tcon))
4821 flags |= CIFS_TRANSFORM_REQ;
4823 req->sync_hdr.CreditRequest = cpu_to_le16(1);
4824 req->StructureSize = cpu_to_le16(36);
4827 memcpy(req->LeaseKey, lease_key, 16);
4828 req->LeaseState = lease_state;
4830 flags |= CIFS_NO_RSP_BUF;
4832 iov[0].iov_base = (char *)req;
4833 iov[0].iov_len = total_len;
4835 memset(&rqst, 0, sizeof(struct smb_rqst));
4839 rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
4840 cifs_small_buf_release(req);
4842 please_key_low = (__u64 *)lease_key;
4843 please_key_high = (__u64 *)(lease_key+8);
4845 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
4846 trace_smb3_lease_err(le32_to_cpu(lease_state), tcon->tid,
4847 ses->Suid, *please_key_low, *please_key_high, rc);
4848 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
4850 trace_smb3_lease_done(le32_to_cpu(lease_state), tcon->tid,
4851 ses->Suid, *please_key_low, *please_key_high);