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)
88 if (!tcon || !tcon->ses)
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,
102 struct TCP_Server_Info *server)
104 shdr->ProtocolId = SMB2_PROTO_NUMBER;
105 shdr->StructureSize = cpu_to_le16(64);
106 shdr->Command = smb2_cmd;
108 spin_lock(&server->req_lock);
109 /* Request up to 10 credits but don't go over the limit. */
110 if (server->credits >= server->max_credits)
111 shdr->CreditRequest = cpu_to_le16(0);
113 shdr->CreditRequest = cpu_to_le16(
114 min_t(int, server->max_credits -
115 server->credits, 10));
116 spin_unlock(&server->req_lock);
118 shdr->CreditRequest = cpu_to_le16(2);
120 shdr->ProcessId = cpu_to_le32((__u16)current->tgid);
125 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
126 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
127 if (server && (server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
128 shdr->CreditCharge = cpu_to_le16(1);
129 /* else CreditCharge MBZ */
131 shdr->TreeId = tcon->tid;
132 /* Uid is not converted */
134 shdr->SessionId = tcon->ses->Suid;
137 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
138 * to pass the path on the Open SMB prefixed by \\server\share.
139 * Not sure when we would need to do the augmented path (if ever) and
140 * setting this flag breaks the SMB2 open operation since it is
141 * illegal to send an empty path name (without \\server\share prefix)
142 * when the DFS flag is set in the SMB open header. We could
143 * consider setting the flag on all operations other than open
144 * but it is safer to net set it for now.
146 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
147 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
149 if (server && server->sign && !smb3_encryption_required(tcon))
150 shdr->Flags |= SMB2_FLAGS_SIGNED;
156 smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon,
157 struct TCP_Server_Info *server)
160 struct nls_table *nls_codepage;
161 struct cifs_ses *ses;
165 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
166 * check for tcp and smb session status done differently
167 * for those three - in the calling routine.
172 if (smb2_command == SMB2_TREE_CONNECT)
175 if (tcon->tidStatus == CifsExiting) {
177 * only tree disconnect, open, and write,
178 * (and ulogoff which does not have tcon)
179 * are allowed as we start force umount.
181 if ((smb2_command != SMB2_WRITE) &&
182 (smb2_command != SMB2_CREATE) &&
183 (smb2_command != SMB2_TREE_DISCONNECT)) {
184 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
189 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
190 (!tcon->ses->server) || !server)
194 retries = server->nr_targets;
197 * Give demultiplex thread up to 10 seconds to each target available for
198 * reconnect -- should be greater than cifs socket timeout which is 7
201 while (server->tcpStatus == CifsNeedReconnect) {
203 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
204 * here since they are implicitly done when session drops.
206 switch (smb2_command) {
208 * BB Should we keep oplock break and add flush to exceptions?
210 case SMB2_TREE_DISCONNECT:
213 case SMB2_OPLOCK_BREAK:
217 rc = wait_event_interruptible_timeout(server->response_q,
218 (server->tcpStatus != CifsNeedReconnect),
221 cifs_dbg(FYI, "%s: aborting reconnect due to a received signal by the process\n",
226 /* are we still trying to reconnect? */
227 if (server->tcpStatus != CifsNeedReconnect)
230 if (retries && --retries)
234 * on "soft" mounts we wait once. Hard mounts keep
235 * retrying until process is killed or server comes
239 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
242 retries = server->nr_targets;
245 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
248 nls_codepage = load_nls_default();
251 * need to prevent multiple threads trying to simultaneously reconnect
252 * the same SMB session
254 mutex_lock(&tcon->ses->session_mutex);
257 * Recheck after acquire mutex. If another thread is negotiating
258 * and the server never sends an answer the socket will be closed
259 * and tcpStatus set to reconnect.
261 if (server->tcpStatus == CifsNeedReconnect) {
263 mutex_unlock(&tcon->ses->session_mutex);
268 * If we are reconnecting an extra channel, bind
270 if (server->is_channel) {
272 ses->binding_chan = cifs_ses_find_chan(ses, server);
275 rc = cifs_negotiate_protocol(0, tcon->ses);
276 if (!rc && tcon->ses->need_reconnect) {
277 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
278 if ((rc == -EACCES) && !tcon->retry) {
280 ses->binding = false;
281 ses->binding_chan = NULL;
282 mutex_unlock(&tcon->ses->session_mutex);
287 * End of channel binding
289 ses->binding = false;
290 ses->binding_chan = NULL;
292 if (rc || !tcon->need_reconnect) {
293 mutex_unlock(&tcon->ses->session_mutex);
297 cifs_mark_open_files_invalid(tcon);
298 if (tcon->use_persistent)
299 tcon->need_reopen_files = true;
301 rc = cifs_tree_connect(0, tcon, nls_codepage);
302 mutex_unlock(&tcon->ses->session_mutex);
304 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
306 /* If sess reconnected but tcon didn't, something strange ... */
307 pr_warn_once("reconnect tcon failed rc = %d\n", rc);
311 if (smb2_command != SMB2_INTERNAL_CMD)
312 mod_delayed_work(cifsiod_wq, &server->reconnect, 0);
314 atomic_inc(&tconInfoReconnectCount);
317 * Check if handle based operation so we know whether we can continue
318 * or not without returning to caller to reset file handle.
321 * BB Is flush done by server on drop of tcp session? Should we special
322 * case it and skip above?
324 switch (smb2_command) {
330 case SMB2_QUERY_DIRECTORY:
331 case SMB2_CHANGE_NOTIFY:
332 case SMB2_QUERY_INFO:
337 unload_nls(nls_codepage);
342 fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon,
343 struct TCP_Server_Info *server,
345 unsigned int *total_len)
347 struct smb2_sync_pdu *spdu = (struct smb2_sync_pdu *)buf;
348 /* lookup word count ie StructureSize from table */
349 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)];
352 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
353 * largest operations (Create)
357 smb2_hdr_assemble(&spdu->sync_hdr, smb2_command, tcon, server);
358 spdu->StructureSize2 = cpu_to_le16(parmsize);
360 *total_len = parmsize + sizeof(struct smb2_sync_hdr);
364 * Allocate and return pointer to an SMB request hdr, and set basic
365 * SMB information in the SMB header. If the return code is zero, this
366 * function must have filled in request_buf pointer.
368 static int __smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
369 struct TCP_Server_Info *server,
370 void **request_buf, unsigned int *total_len)
372 /* BB eventually switch this to SMB2 specific small buf size */
373 if (smb2_command == SMB2_SET_INFO)
374 *request_buf = cifs_buf_get();
376 *request_buf = cifs_small_buf_get();
377 if (*request_buf == NULL) {
378 /* BB should we add a retry in here if not a writepage? */
382 fill_small_buf(smb2_command, tcon, server,
383 (struct smb2_sync_hdr *)(*request_buf),
387 uint16_t com_code = le16_to_cpu(smb2_command);
388 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
389 cifs_stats_inc(&tcon->num_smbs_sent);
395 static int smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
396 struct TCP_Server_Info *server,
397 void **request_buf, unsigned int *total_len)
401 rc = smb2_reconnect(smb2_command, tcon, server);
405 return __smb2_plain_req_init(smb2_command, tcon, server, request_buf,
409 static int smb2_ioctl_req_init(u32 opcode, struct cifs_tcon *tcon,
410 struct TCP_Server_Info *server,
411 void **request_buf, unsigned int *total_len)
413 /* Skip reconnect only for FSCTL_VALIDATE_NEGOTIATE_INFO IOCTLs */
414 if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) {
415 return __smb2_plain_req_init(SMB2_IOCTL, tcon, server,
416 request_buf, total_len);
418 return smb2_plain_req_init(SMB2_IOCTL, tcon, server,
419 request_buf, total_len);
422 /* For explanation of negotiate contexts see MS-SMB2 section 2.2.3.1 */
425 build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
427 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
428 pneg_ctxt->DataLength = cpu_to_le16(38);
429 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
430 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_LINUX_CLIENT_SALT_SIZE);
431 get_random_bytes(pneg_ctxt->Salt, SMB311_LINUX_CLIENT_SALT_SIZE);
432 pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
436 build_compression_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt)
438 pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES;
439 pneg_ctxt->DataLength =
440 cpu_to_le16(sizeof(struct smb2_compression_capabilities_context)
441 - sizeof(struct smb2_neg_context));
442 pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(3);
443 pneg_ctxt->CompressionAlgorithms[0] = SMB3_COMPRESS_LZ77;
444 pneg_ctxt->CompressionAlgorithms[1] = SMB3_COMPRESS_LZ77_HUFF;
445 pneg_ctxt->CompressionAlgorithms[2] = SMB3_COMPRESS_LZNT1;
449 build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
451 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
452 if (require_gcm_256) {
453 pneg_ctxt->DataLength = cpu_to_le16(4); /* Cipher Count + 1 cipher */
454 pneg_ctxt->CipherCount = cpu_to_le16(1);
455 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES256_GCM;
456 } else if (enable_gcm_256) {
457 pneg_ctxt->DataLength = cpu_to_le16(8); /* Cipher Count + 3 ciphers */
458 pneg_ctxt->CipherCount = cpu_to_le16(3);
459 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
460 pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES256_GCM;
461 pneg_ctxt->Ciphers[2] = SMB2_ENCRYPTION_AES128_CCM;
463 pneg_ctxt->DataLength = cpu_to_le16(6); /* Cipher Count + 2 ciphers */
464 pneg_ctxt->CipherCount = cpu_to_le16(2);
465 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
466 pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM;
471 build_netname_ctxt(struct smb2_netname_neg_context *pneg_ctxt, char *hostname)
473 struct nls_table *cp = load_nls_default();
475 pneg_ctxt->ContextType = SMB2_NETNAME_NEGOTIATE_CONTEXT_ID;
477 /* copy up to max of first 100 bytes of server name to NetName field */
478 pneg_ctxt->DataLength = cpu_to_le16(2 * cifs_strtoUTF16(pneg_ctxt->NetName, hostname, 100, cp));
479 /* context size is DataLength + minimal smb2_neg_context */
480 return DIV_ROUND_UP(le16_to_cpu(pneg_ctxt->DataLength) +
481 sizeof(struct smb2_neg_context), 8) * 8;
485 build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
487 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
488 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
489 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
490 pneg_ctxt->Name[0] = 0x93;
491 pneg_ctxt->Name[1] = 0xAD;
492 pneg_ctxt->Name[2] = 0x25;
493 pneg_ctxt->Name[3] = 0x50;
494 pneg_ctxt->Name[4] = 0x9C;
495 pneg_ctxt->Name[5] = 0xB4;
496 pneg_ctxt->Name[6] = 0x11;
497 pneg_ctxt->Name[7] = 0xE7;
498 pneg_ctxt->Name[8] = 0xB4;
499 pneg_ctxt->Name[9] = 0x23;
500 pneg_ctxt->Name[10] = 0x83;
501 pneg_ctxt->Name[11] = 0xDE;
502 pneg_ctxt->Name[12] = 0x96;
503 pneg_ctxt->Name[13] = 0x8B;
504 pneg_ctxt->Name[14] = 0xCD;
505 pneg_ctxt->Name[15] = 0x7C;
509 assemble_neg_contexts(struct smb2_negotiate_req *req,
510 struct TCP_Server_Info *server, unsigned int *total_len)
513 unsigned int ctxt_len;
515 if (*total_len > 200) {
516 /* In case length corrupted don't want to overrun smb buffer */
517 cifs_server_dbg(VFS, "Bad frame length assembling neg contexts\n");
522 * round up total_len of fixed part of SMB3 negotiate request to 8
523 * byte boundary before adding negotiate contexts
525 *total_len = roundup(*total_len, 8);
527 pneg_ctxt = (*total_len) + (char *)req;
528 req->NegotiateContextOffset = cpu_to_le32(*total_len);
530 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
531 ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_preauth_neg_context), 8) * 8;
532 *total_len += ctxt_len;
533 pneg_ctxt += ctxt_len;
535 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
536 ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_encryption_neg_context), 8) * 8;
537 *total_len += ctxt_len;
538 pneg_ctxt += ctxt_len;
540 if (server->compress_algorithm) {
541 build_compression_ctxt((struct smb2_compression_capabilities_context *)
543 ctxt_len = DIV_ROUND_UP(
544 sizeof(struct smb2_compression_capabilities_context),
546 *total_len += ctxt_len;
547 pneg_ctxt += ctxt_len;
548 req->NegotiateContextCount = cpu_to_le16(5);
550 req->NegotiateContextCount = cpu_to_le16(4);
552 ctxt_len = build_netname_ctxt((struct smb2_netname_neg_context *)pneg_ctxt,
554 *total_len += ctxt_len;
555 pneg_ctxt += ctxt_len;
557 build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
558 *total_len += sizeof(struct smb2_posix_neg_context);
561 static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt)
563 unsigned int len = le16_to_cpu(ctxt->DataLength);
565 /* If invalid preauth context warn but use what we requested, SHA-512 */
566 if (len < MIN_PREAUTH_CTXT_DATA_LEN) {
567 pr_warn_once("server sent bad preauth context\n");
569 } else if (len < MIN_PREAUTH_CTXT_DATA_LEN + le16_to_cpu(ctxt->SaltLength)) {
570 pr_warn_once("server sent invalid SaltLength\n");
573 if (le16_to_cpu(ctxt->HashAlgorithmCount) != 1)
574 pr_warn_once("Invalid SMB3 hash algorithm count\n");
575 if (ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
576 pr_warn_once("unknown SMB3 hash algorithm\n");
579 static void decode_compress_ctx(struct TCP_Server_Info *server,
580 struct smb2_compression_capabilities_context *ctxt)
582 unsigned int len = le16_to_cpu(ctxt->DataLength);
584 /* sizeof compress context is a one element compression capbility struct */
586 pr_warn_once("server sent bad compression cntxt\n");
589 if (le16_to_cpu(ctxt->CompressionAlgorithmCount) != 1) {
590 pr_warn_once("Invalid SMB3 compress algorithm count\n");
593 if (le16_to_cpu(ctxt->CompressionAlgorithms[0]) > 3) {
594 pr_warn_once("unknown compression algorithm\n");
597 server->compress_algorithm = ctxt->CompressionAlgorithms[0];
600 static int decode_encrypt_ctx(struct TCP_Server_Info *server,
601 struct smb2_encryption_neg_context *ctxt)
603 unsigned int len = le16_to_cpu(ctxt->DataLength);
605 cifs_dbg(FYI, "decode SMB3.11 encryption neg context of len %d\n", len);
606 if (len < MIN_ENCRYPT_CTXT_DATA_LEN) {
607 pr_warn_once("server sent bad crypto ctxt len\n");
611 if (le16_to_cpu(ctxt->CipherCount) != 1) {
612 pr_warn_once("Invalid SMB3.11 cipher count\n");
615 cifs_dbg(FYI, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt->Ciphers[0]));
616 if (require_gcm_256) {
617 if (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES256_GCM) {
618 cifs_dbg(VFS, "Server does not support requested encryption type (AES256 GCM)\n");
621 } else if (ctxt->Ciphers[0] == 0) {
623 * e.g. if server only supported AES256_CCM (very unlikely)
624 * or server supported no encryption types or had all disabled.
625 * Since GLOBAL_CAP_ENCRYPTION will be not set, in the case
626 * in which mount requested encryption ("seal") checks later
627 * on during tree connection will return proper rc, but if
628 * seal not requested by client, since server is allowed to
629 * return 0 to indicate no supported cipher, we can't fail here
631 server->cipher_type = 0;
632 server->capabilities &= ~SMB2_GLOBAL_CAP_ENCRYPTION;
633 pr_warn_once("Server does not support requested encryption types\n");
635 } else if ((ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_CCM) &&
636 (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_GCM) &&
637 (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES256_GCM)) {
638 /* server returned a cipher we didn't ask for */
639 pr_warn_once("Invalid SMB3.11 cipher returned\n");
642 server->cipher_type = ctxt->Ciphers[0];
643 server->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
647 static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp,
648 struct TCP_Server_Info *server,
649 unsigned int len_of_smb)
651 struct smb2_neg_context *pctx;
652 unsigned int offset = le32_to_cpu(rsp->NegotiateContextOffset);
653 unsigned int ctxt_cnt = le16_to_cpu(rsp->NegotiateContextCount);
654 unsigned int len_of_ctxts, i;
657 cifs_dbg(FYI, "decoding %d negotiate contexts\n", ctxt_cnt);
658 if (len_of_smb <= offset) {
659 cifs_server_dbg(VFS, "Invalid response: negotiate context offset\n");
663 len_of_ctxts = len_of_smb - offset;
665 for (i = 0; i < ctxt_cnt; i++) {
667 /* check that offset is not beyond end of SMB */
668 if (len_of_ctxts == 0)
671 if (len_of_ctxts < sizeof(struct smb2_neg_context))
674 pctx = (struct smb2_neg_context *)(offset + (char *)rsp);
675 clen = le16_to_cpu(pctx->DataLength);
676 if (clen > len_of_ctxts)
679 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES)
680 decode_preauth_context(
681 (struct smb2_preauth_neg_context *)pctx);
682 else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES)
683 rc = decode_encrypt_ctx(server,
684 (struct smb2_encryption_neg_context *)pctx);
685 else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES)
686 decode_compress_ctx(server,
687 (struct smb2_compression_capabilities_context *)pctx);
688 else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE)
689 server->posix_ext_supported = true;
691 cifs_server_dbg(VFS, "unknown negcontext of type %d ignored\n",
692 le16_to_cpu(pctx->ContextType));
696 /* offsets must be 8 byte aligned */
697 clen = (clen + 7) & ~0x7;
698 offset += clen + sizeof(struct smb2_neg_context);
699 len_of_ctxts -= clen;
704 static struct create_posix *
705 create_posix_buf(umode_t mode)
707 struct create_posix *buf;
709 buf = kzalloc(sizeof(struct create_posix),
714 buf->ccontext.DataOffset =
715 cpu_to_le16(offsetof(struct create_posix, Mode));
716 buf->ccontext.DataLength = cpu_to_le32(4);
717 buf->ccontext.NameOffset =
718 cpu_to_le16(offsetof(struct create_posix, Name));
719 buf->ccontext.NameLength = cpu_to_le16(16);
721 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
732 buf->Name[10] = 0x83;
733 buf->Name[11] = 0xDE;
734 buf->Name[12] = 0x96;
735 buf->Name[13] = 0x8B;
736 buf->Name[14] = 0xCD;
737 buf->Name[15] = 0x7C;
738 buf->Mode = cpu_to_le32(mode);
739 cifs_dbg(FYI, "mode on posix create 0%o\n", mode);
744 add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode)
746 struct smb2_create_req *req = iov[0].iov_base;
747 unsigned int num = *num_iovec;
749 iov[num].iov_base = create_posix_buf(mode);
750 if (mode == ACL_NO_MODE)
751 cifs_dbg(FYI, "Invalid mode\n");
752 if (iov[num].iov_base == NULL)
754 iov[num].iov_len = sizeof(struct create_posix);
755 if (!req->CreateContextsOffset)
756 req->CreateContextsOffset = cpu_to_le32(
757 sizeof(struct smb2_create_req) +
758 iov[num - 1].iov_len);
759 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_posix));
760 *num_iovec = num + 1;
767 * SMB2 Worker functions follow:
769 * The general structure of the worker functions is:
770 * 1) Call smb2_init (assembles SMB2 header)
771 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
772 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
773 * 4) Decode SMB2 command specific fields in the fixed length area
774 * 5) Decode variable length data area (if any for this SMB2 command type)
775 * 6) Call free smb buffer
781 SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
783 struct smb_rqst rqst;
784 struct smb2_negotiate_req *req;
785 struct smb2_negotiate_rsp *rsp;
790 struct TCP_Server_Info *server = cifs_ses_server(ses);
791 int blob_offset, blob_length;
793 int flags = CIFS_NEG_OP;
794 unsigned int total_len;
796 cifs_dbg(FYI, "Negotiate protocol\n");
799 WARN(1, "%s: server is NULL!\n", __func__);
803 rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, server,
804 (void **) &req, &total_len);
808 req->sync_hdr.SessionId = 0;
810 memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
811 memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
813 if (strcmp(server->vals->version_string,
814 SMB3ANY_VERSION_STRING) == 0) {
815 req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
816 req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
817 req->DialectCount = cpu_to_le16(2);
819 } else if (strcmp(server->vals->version_string,
820 SMBDEFAULT_VERSION_STRING) == 0) {
821 req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
822 req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
823 req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
824 req->Dialects[3] = cpu_to_le16(SMB311_PROT_ID);
825 req->DialectCount = cpu_to_le16(4);
828 /* otherwise send specific dialect */
829 req->Dialects[0] = cpu_to_le16(server->vals->protocol_id);
830 req->DialectCount = cpu_to_le16(1);
834 /* only one of SMB2 signing flags may be set in SMB2 request */
836 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
837 else if (global_secflags & CIFSSEC_MAY_SIGN)
838 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
840 req->SecurityMode = 0;
842 req->Capabilities = cpu_to_le32(server->vals->req_capabilities);
844 /* ClientGUID must be zero for SMB2.02 dialect */
845 if (server->vals->protocol_id == SMB20_PROT_ID)
846 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
848 memcpy(req->ClientGUID, server->client_guid,
849 SMB2_CLIENT_GUID_SIZE);
850 if ((server->vals->protocol_id == SMB311_PROT_ID) ||
851 (strcmp(server->vals->version_string,
852 SMBDEFAULT_VERSION_STRING) == 0))
853 assemble_neg_contexts(req, server, &total_len);
855 iov[0].iov_base = (char *)req;
856 iov[0].iov_len = total_len;
858 memset(&rqst, 0, sizeof(struct smb_rqst));
862 rc = cifs_send_recv(xid, ses, server,
863 &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 specifying vers=1.0 or vers=2.0 on mount for accessing older servers\n");
876 if (strcmp(server->vals->version_string,
877 SMB3ANY_VERSION_STRING) == 0) {
878 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
880 "SMB2 dialect returned but not requested\n");
882 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
884 "SMB2.1 dialect returned but not requested\n");
887 } else if (strcmp(server->vals->version_string,
888 SMBDEFAULT_VERSION_STRING) == 0) {
889 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
891 "SMB2 dialect returned but not requested\n");
893 } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
894 /* ops set to 3.0 by default for default so update */
895 server->ops = &smb21_operations;
896 server->vals = &smb21_values;
897 } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
898 server->ops = &smb311_operations;
899 server->vals = &smb311_values;
901 } else if (le16_to_cpu(rsp->DialectRevision) !=
902 server->vals->protocol_id) {
903 /* if requested single dialect ensure returned dialect matched */
904 cifs_server_dbg(VFS, "Invalid 0x%x dialect returned: not requested\n",
905 le16_to_cpu(rsp->DialectRevision));
909 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
911 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
912 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
913 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
914 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
915 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
916 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
917 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
918 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
919 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
920 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
922 cifs_server_dbg(VFS, "Invalid dialect returned by server 0x%x\n",
923 le16_to_cpu(rsp->DialectRevision));
927 server->dialect = le16_to_cpu(rsp->DialectRevision);
930 * Keep a copy of the hash after negprot. This hash will be
931 * the starting hash value for all sessions made from this
934 memcpy(server->preauth_sha_hash, ses->preauth_sha_hash,
935 SMB2_PREAUTH_HASH_SIZE);
937 /* SMB2 only has an extended negflavor */
938 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
939 /* set it to the maximum buffer size value we can send with 1 credit */
940 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
941 SMB2_MAX_BUFFER_SIZE);
942 server->max_read = le32_to_cpu(rsp->MaxReadSize);
943 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
944 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
945 if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode)
946 cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n",
948 server->capabilities = le32_to_cpu(rsp->Capabilities);
950 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
952 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
953 (struct smb2_sync_hdr *)rsp);
955 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
957 * ses->sectype = RawNTLMSSP;
958 * but for time being this is our only auth choice so doesn't matter.
959 * We just found a server which sets blob length to zero expecting raw.
961 if (blob_length == 0) {
962 cifs_dbg(FYI, "missing security blob on negprot\n");
963 server->sec_ntlmssp = true;
966 rc = cifs_enable_signing(server, ses->sign);
970 rc = decode_negTokenInit(security_blob, blob_length, server);
977 if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
978 if (rsp->NegotiateContextCount)
979 rc = smb311_decode_neg_context(rsp, server,
982 cifs_server_dbg(VFS, "Missing expected negotiate contexts\n");
985 free_rsp_buf(resp_buftype, rsp);
989 int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
992 struct validate_negotiate_info_req *pneg_inbuf;
993 struct validate_negotiate_info_rsp *pneg_rsp = NULL;
995 u32 inbuflen; /* max of 4 dialects */
996 struct TCP_Server_Info *server = tcon->ses->server;
998 cifs_dbg(FYI, "validate negotiate\n");
1000 /* In SMB3.11 preauth integrity supersedes validate negotiate */
1001 if (server->dialect == SMB311_PROT_ID)
1005 * validation ioctl must be signed, so no point sending this if we
1006 * can not sign it (ie are not known user). Even if signing is not
1007 * required (enabled but not negotiated), in those cases we selectively
1008 * sign just this, the first and only signed request on a connection.
1009 * Having validation of negotiate info helps reduce attack vectors.
1011 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
1012 return 0; /* validation requires signing */
1014 if (tcon->ses->user_name == NULL) {
1015 cifs_dbg(FYI, "Can't validate negotiate: null user mount\n");
1016 return 0; /* validation requires signing */
1019 if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
1020 cifs_tcon_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n");
1022 pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS);
1026 pneg_inbuf->Capabilities =
1027 cpu_to_le32(server->vals->req_capabilities);
1028 memcpy(pneg_inbuf->Guid, server->client_guid,
1029 SMB2_CLIENT_GUID_SIZE);
1031 if (tcon->ses->sign)
1032 pneg_inbuf->SecurityMode =
1033 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
1034 else if (global_secflags & CIFSSEC_MAY_SIGN)
1035 pneg_inbuf->SecurityMode =
1036 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
1038 pneg_inbuf->SecurityMode = 0;
1041 if (strcmp(server->vals->version_string,
1042 SMB3ANY_VERSION_STRING) == 0) {
1043 pneg_inbuf->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
1044 pneg_inbuf->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
1045 pneg_inbuf->DialectCount = cpu_to_le16(2);
1046 /* structure is big enough for 3 dialects, sending only 2 */
1047 inbuflen = sizeof(*pneg_inbuf) -
1048 (2 * sizeof(pneg_inbuf->Dialects[0]));
1049 } else if (strcmp(server->vals->version_string,
1050 SMBDEFAULT_VERSION_STRING) == 0) {
1051 pneg_inbuf->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
1052 pneg_inbuf->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
1053 pneg_inbuf->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
1054 pneg_inbuf->Dialects[3] = cpu_to_le16(SMB311_PROT_ID);
1055 pneg_inbuf->DialectCount = cpu_to_le16(4);
1056 /* structure is big enough for 3 dialects */
1057 inbuflen = sizeof(*pneg_inbuf);
1059 /* otherwise specific dialect was requested */
1060 pneg_inbuf->Dialects[0] =
1061 cpu_to_le16(server->vals->protocol_id);
1062 pneg_inbuf->DialectCount = cpu_to_le16(1);
1063 /* structure is big enough for 3 dialects, sending only 1 */
1064 inbuflen = sizeof(*pneg_inbuf) -
1065 sizeof(pneg_inbuf->Dialects[0]) * 2;
1068 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1069 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
1070 (char *)pneg_inbuf, inbuflen, CIFSMaxBufSize,
1071 (char **)&pneg_rsp, &rsplen);
1072 if (rc == -EOPNOTSUPP) {
1074 * Old Windows versions or Netapp SMB server can return
1075 * not supported error. Client should accept it.
1077 cifs_tcon_dbg(VFS, "Server does not support validate negotiate\n");
1079 goto out_free_inbuf;
1080 } else if (rc != 0) {
1081 cifs_tcon_dbg(VFS, "validate protocol negotiate failed: %d\n",
1084 goto out_free_inbuf;
1088 if (rsplen != sizeof(*pneg_rsp)) {
1089 cifs_tcon_dbg(VFS, "Invalid protocol negotiate response size: %d\n",
1092 /* relax check since Mac returns max bufsize allowed on ioctl */
1093 if (rsplen > CIFSMaxBufSize || rsplen < sizeof(*pneg_rsp))
1097 /* check validate negotiate info response matches what we got earlier */
1098 if (pneg_rsp->Dialect != cpu_to_le16(server->dialect))
1101 if (pneg_rsp->SecurityMode != cpu_to_le16(server->sec_mode))
1104 /* do not validate server guid because not saved at negprot time yet */
1106 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
1107 SMB2_LARGE_FILES) != server->capabilities)
1110 /* validate negotiate successful */
1112 cifs_dbg(FYI, "validate negotiate info successful\n");
1116 cifs_tcon_dbg(VFS, "protocol revalidation - security settings mismatch\n");
1125 smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
1127 switch (requested) {
1134 if (server->sec_ntlmssp &&
1135 (global_secflags & CIFSSEC_MAY_NTLMSSP))
1137 if ((server->sec_kerberos || server->sec_mskerberos) &&
1138 (global_secflags & CIFSSEC_MAY_KRB5))
1146 struct SMB2_sess_data {
1148 struct cifs_ses *ses;
1149 struct nls_table *nls_cp;
1150 void (*func)(struct SMB2_sess_data *);
1152 u64 previous_session;
1154 /* we will send the SMB in three pieces:
1155 * a fixed length beginning part, an optional
1156 * SPNEGO blob (which can be zero length), and a
1157 * last part which will include the strings
1158 * and rest of bcc area. This allows us to avoid
1159 * a large buffer 17K allocation
1166 SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
1169 struct cifs_ses *ses = sess_data->ses;
1170 struct smb2_sess_setup_req *req;
1171 struct TCP_Server_Info *server = cifs_ses_server(ses);
1172 unsigned int total_len;
1174 rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, server,
1180 if (sess_data->ses->binding) {
1181 req->sync_hdr.SessionId = sess_data->ses->Suid;
1182 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1183 req->PreviousSessionId = 0;
1184 req->Flags = SMB2_SESSION_REQ_FLAG_BINDING;
1186 /* First session, not a reauthenticate */
1187 req->sync_hdr.SessionId = 0;
1189 * if reconnect, we need to send previous sess id
1192 req->PreviousSessionId = sess_data->previous_session;
1193 req->Flags = 0; /* MBZ */
1196 /* enough to enable echos and oplocks and one max size write */
1197 req->sync_hdr.CreditRequest = cpu_to_le16(130);
1199 /* only one of SMB2 signing flags may be set in SMB2 request */
1201 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
1202 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
1203 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
1205 req->SecurityMode = 0;
1207 #ifdef CONFIG_CIFS_DFS_UPCALL
1208 req->Capabilities = cpu_to_le32(SMB2_GLOBAL_CAP_DFS);
1210 req->Capabilities = 0;
1211 #endif /* DFS_UPCALL */
1213 req->Channel = 0; /* MBZ */
1215 sess_data->iov[0].iov_base = (char *)req;
1217 sess_data->iov[0].iov_len = total_len - 1;
1219 * This variable will be used to clear the buffer
1220 * allocated above in case of any error in the calling function.
1222 sess_data->buf0_type = CIFS_SMALL_BUFFER;
1228 SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
1230 free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
1231 sess_data->buf0_type = CIFS_NO_BUFFER;
1235 SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
1238 struct smb_rqst rqst;
1239 struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
1240 struct kvec rsp_iov = { NULL, 0 };
1242 /* Testing shows that buffer offset must be at location of Buffer[0] */
1243 req->SecurityBufferOffset =
1244 cpu_to_le16(sizeof(struct smb2_sess_setup_req) - 1 /* pad */);
1245 req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
1247 memset(&rqst, 0, sizeof(struct smb_rqst));
1248 rqst.rq_iov = sess_data->iov;
1251 /* BB add code to build os and lm fields */
1252 rc = cifs_send_recv(sess_data->xid, sess_data->ses,
1253 cifs_ses_server(sess_data->ses),
1255 &sess_data->buf0_type,
1256 CIFS_LOG_ERROR | CIFS_NEG_OP, &rsp_iov);
1257 cifs_small_buf_release(sess_data->iov[0].iov_base);
1258 memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
1264 SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
1267 struct cifs_ses *ses = sess_data->ses;
1268 struct TCP_Server_Info *server = cifs_ses_server(ses);
1270 mutex_lock(&server->srv_mutex);
1271 if (server->ops->generate_signingkey) {
1272 rc = server->ops->generate_signingkey(ses);
1275 "SMB3 session key generation failed\n");
1276 mutex_unlock(&server->srv_mutex);
1280 if (!server->session_estab) {
1281 server->sequence_number = 0x2;
1282 server->session_estab = true;
1284 mutex_unlock(&server->srv_mutex);
1286 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
1287 /* keep existing ses state if binding */
1288 if (!ses->binding) {
1289 spin_lock(&GlobalMid_Lock);
1290 ses->status = CifsGood;
1291 ses->need_reconnect = false;
1292 spin_unlock(&GlobalMid_Lock);
1298 #ifdef CONFIG_CIFS_UPCALL
1300 SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1303 struct cifs_ses *ses = sess_data->ses;
1304 struct cifs_spnego_msg *msg;
1305 struct key *spnego_key = NULL;
1306 struct smb2_sess_setup_rsp *rsp = NULL;
1308 rc = SMB2_sess_alloc_buffer(sess_data);
1312 spnego_key = cifs_get_spnego_key(ses);
1313 if (IS_ERR(spnego_key)) {
1314 rc = PTR_ERR(spnego_key);
1316 cifs_dbg(VFS, "Verify user has a krb5 ticket and keyutils is installed\n");
1321 msg = spnego_key->payload.data[0];
1323 * check version field to make sure that cifs.upcall is
1324 * sending us a response in an expected form
1326 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
1327 cifs_dbg(VFS, "bad cifs.upcall version. Expected %d got %d\n",
1328 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
1330 goto out_put_spnego_key;
1333 /* keep session key if binding */
1334 if (!ses->binding) {
1335 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
1337 if (!ses->auth_key.response) {
1338 cifs_dbg(VFS, "Kerberos can't allocate (%u bytes) memory\n",
1341 goto out_put_spnego_key;
1343 ses->auth_key.len = msg->sesskey_len;
1346 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
1347 sess_data->iov[1].iov_len = msg->secblob_len;
1349 rc = SMB2_sess_sendreceive(sess_data);
1351 goto out_put_spnego_key;
1353 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1354 /* keep session id and flags if binding */
1355 if (!ses->binding) {
1356 ses->Suid = rsp->sync_hdr.SessionId;
1357 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
1360 rc = SMB2_sess_establish_session(sess_data);
1362 key_invalidate(spnego_key);
1363 key_put(spnego_key);
1365 sess_data->result = rc;
1366 sess_data->func = NULL;
1367 SMB2_sess_free_buffer(sess_data);
1371 SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
1373 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
1374 sess_data->result = -EOPNOTSUPP;
1375 sess_data->func = NULL;
1380 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
1383 SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
1386 struct cifs_ses *ses = sess_data->ses;
1387 struct smb2_sess_setup_rsp *rsp = NULL;
1388 char *ntlmssp_blob = NULL;
1389 bool use_spnego = false; /* else use raw ntlmssp */
1390 u16 blob_length = 0;
1393 * If memory allocation is successful, caller of this function
1396 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
1397 if (!ses->ntlmssp) {
1401 ses->ntlmssp->sesskey_per_smbsess = true;
1403 rc = SMB2_sess_alloc_buffer(sess_data);
1407 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
1409 if (ntlmssp_blob == NULL) {
1414 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
1416 /* BB eventually need to add this */
1417 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1421 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
1422 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
1424 sess_data->iov[1].iov_base = ntlmssp_blob;
1425 sess_data->iov[1].iov_len = blob_length;
1427 rc = SMB2_sess_sendreceive(sess_data);
1428 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1430 /* If true, rc here is expected and not an error */
1431 if (sess_data->buf0_type != CIFS_NO_BUFFER &&
1432 rsp->sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
1438 if (offsetof(struct smb2_sess_setup_rsp, Buffer) !=
1439 le16_to_cpu(rsp->SecurityBufferOffset)) {
1440 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
1441 le16_to_cpu(rsp->SecurityBufferOffset));
1445 rc = decode_ntlmssp_challenge(rsp->Buffer,
1446 le16_to_cpu(rsp->SecurityBufferLength), ses);
1450 cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
1452 /* keep existing ses id and flags if binding */
1453 if (!ses->binding) {
1454 ses->Suid = rsp->sync_hdr.SessionId;
1455 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
1459 kfree(ntlmssp_blob);
1460 SMB2_sess_free_buffer(sess_data);
1462 sess_data->result = 0;
1463 sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
1467 kfree(ses->ntlmssp);
1468 ses->ntlmssp = NULL;
1469 sess_data->result = rc;
1470 sess_data->func = NULL;
1474 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
1477 struct cifs_ses *ses = sess_data->ses;
1478 struct smb2_sess_setup_req *req;
1479 struct smb2_sess_setup_rsp *rsp = NULL;
1480 unsigned char *ntlmssp_blob = NULL;
1481 bool use_spnego = false; /* else use raw ntlmssp */
1482 u16 blob_length = 0;
1484 rc = SMB2_sess_alloc_buffer(sess_data);
1488 req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
1489 req->sync_hdr.SessionId = ses->Suid;
1491 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
1494 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
1499 /* BB eventually need to add this */
1500 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1504 sess_data->iov[1].iov_base = ntlmssp_blob;
1505 sess_data->iov[1].iov_len = blob_length;
1507 rc = SMB2_sess_sendreceive(sess_data);
1511 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1513 /* keep existing ses id and flags if binding */
1514 if (!ses->binding) {
1515 ses->Suid = rsp->sync_hdr.SessionId;
1516 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
1519 rc = SMB2_sess_establish_session(sess_data);
1520 #ifdef CONFIG_CIFS_DEBUG_DUMP_KEYS
1521 if (ses->server->dialect < SMB30_PROT_ID) {
1522 cifs_dbg(VFS, "%s: dumping generated SMB2 session keys\n", __func__);
1524 * The session id is opaque in terms of endianness, so we can't
1525 * print it as a long long. we dump it as we got it on the wire
1527 cifs_dbg(VFS, "Session Id %*ph\n", (int)sizeof(ses->Suid),
1529 cifs_dbg(VFS, "Session Key %*ph\n",
1530 SMB2_NTLMV2_SESSKEY_SIZE, ses->auth_key.response);
1531 cifs_dbg(VFS, "Signing Key %*ph\n",
1532 SMB3_SIGN_KEY_SIZE, ses->auth_key.response);
1536 kfree(ntlmssp_blob);
1537 SMB2_sess_free_buffer(sess_data);
1538 kfree(ses->ntlmssp);
1539 ses->ntlmssp = NULL;
1540 sess_data->result = rc;
1541 sess_data->func = NULL;
1545 SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data)
1549 type = smb2_select_sectype(cifs_ses_server(ses), ses->sectype);
1550 cifs_dbg(FYI, "sess setup type %d\n", type);
1551 if (type == Unspecified) {
1552 cifs_dbg(VFS, "Unable to select appropriate authentication method!\n");
1558 sess_data->func = SMB2_auth_kerberos;
1561 sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
1564 cifs_dbg(VFS, "secType %d not supported!\n", type);
1572 SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
1573 const struct nls_table *nls_cp)
1576 struct TCP_Server_Info *server = cifs_ses_server(ses);
1577 struct SMB2_sess_data *sess_data;
1579 cifs_dbg(FYI, "Session Setup\n");
1582 WARN(1, "%s: server is NULL!\n", __func__);
1586 sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
1590 rc = SMB2_select_sec(ses, sess_data);
1593 sess_data->xid = xid;
1594 sess_data->ses = ses;
1595 sess_data->buf0_type = CIFS_NO_BUFFER;
1596 sess_data->nls_cp = (struct nls_table *) nls_cp;
1597 sess_data->previous_session = ses->Suid;
1600 * Initialize the session hash with the server one.
1602 memcpy(ses->preauth_sha_hash, server->preauth_sha_hash,
1603 SMB2_PREAUTH_HASH_SIZE);
1605 while (sess_data->func)
1606 sess_data->func(sess_data);
1608 if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign))
1609 cifs_server_dbg(VFS, "signing requested but authenticated as guest\n");
1610 rc = sess_data->result;
1617 SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
1619 struct smb_rqst rqst;
1620 struct smb2_logoff_req *req; /* response is also trivial struct */
1622 struct TCP_Server_Info *server;
1624 unsigned int total_len;
1626 struct kvec rsp_iov;
1629 cifs_dbg(FYI, "disconnect session %p\n", ses);
1631 if (ses && (ses->server))
1632 server = ses->server;
1636 /* no need to send SMB logoff if uid already closed due to reconnect */
1637 if (ses->need_reconnect)
1638 goto smb2_session_already_dead;
1640 rc = smb2_plain_req_init(SMB2_LOGOFF, NULL, ses->server,
1641 (void **) &req, &total_len);
1645 /* since no tcon, smb2_init can not do this, so do here */
1646 req->sync_hdr.SessionId = ses->Suid;
1648 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
1649 flags |= CIFS_TRANSFORM_REQ;
1650 else if (server->sign)
1651 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1653 flags |= CIFS_NO_RSP_BUF;
1655 iov[0].iov_base = (char *)req;
1656 iov[0].iov_len = total_len;
1658 memset(&rqst, 0, sizeof(struct smb_rqst));
1662 rc = cifs_send_recv(xid, ses, ses->server,
1663 &rqst, &resp_buf_type, flags, &rsp_iov);
1664 cifs_small_buf_release(req);
1666 * No tcon so can't do
1667 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1670 smb2_session_already_dead:
1674 static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
1676 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
1679 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1681 /* These are similar values to what Windows uses */
1682 static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
1684 tcon->max_chunks = 256;
1685 tcon->max_bytes_chunk = 1048576;
1686 tcon->max_bytes_copy = 16777216;
1690 SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
1691 struct cifs_tcon *tcon, const struct nls_table *cp)
1693 struct smb_rqst rqst;
1694 struct smb2_tree_connect_req *req;
1695 struct smb2_tree_connect_rsp *rsp = NULL;
1697 struct kvec rsp_iov = { NULL, 0 };
1701 __le16 *unc_path = NULL;
1703 unsigned int total_len;
1704 struct TCP_Server_Info *server;
1706 /* always use master channel */
1707 server = ses->server;
1709 cifs_dbg(FYI, "TCON\n");
1711 if (!server || !tree)
1714 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
1715 if (unc_path == NULL)
1718 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
1720 if (unc_path_len < 2) {
1725 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
1727 atomic_set(&tcon->num_remote_opens, 0);
1728 rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, server,
1729 (void **) &req, &total_len);
1735 if (smb3_encryption_required(tcon))
1736 flags |= CIFS_TRANSFORM_REQ;
1738 iov[0].iov_base = (char *)req;
1740 iov[0].iov_len = total_len - 1;
1742 /* Testing shows that buffer offset must be at location of Buffer[0] */
1743 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
1745 req->PathLength = cpu_to_le16(unc_path_len - 2);
1746 iov[1].iov_base = unc_path;
1747 iov[1].iov_len = unc_path_len;
1750 * 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1
1751 * unless it is guest or anonymous user. See MS-SMB2 3.2.5.3.1
1752 * (Samba servers don't always set the flag so also check if null user)
1754 if ((server->dialect == SMB311_PROT_ID) &&
1755 !smb3_encryption_required(tcon) &&
1756 !(ses->session_flags &
1757 (SMB2_SESSION_FLAG_IS_GUEST|SMB2_SESSION_FLAG_IS_NULL)) &&
1758 ((ses->user_name != NULL) || (ses->sectype == Kerberos)))
1759 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1761 memset(&rqst, 0, sizeof(struct smb_rqst));
1765 /* Need 64 for max size write so ask for more in case not there yet */
1766 req->sync_hdr.CreditRequest = cpu_to_le16(64);
1768 rc = cifs_send_recv(xid, ses, server,
1769 &rqst, &resp_buftype, flags, &rsp_iov);
1770 cifs_small_buf_release(req);
1771 rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
1772 trace_smb3_tcon(xid, tcon->tid, ses->Suid, tree, rc);
1775 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
1776 tcon->need_reconnect = true;
1778 goto tcon_error_exit;
1781 switch (rsp->ShareType) {
1782 case SMB2_SHARE_TYPE_DISK:
1783 cifs_dbg(FYI, "connection to disk share\n");
1785 case SMB2_SHARE_TYPE_PIPE:
1787 cifs_dbg(FYI, "connection to pipe share\n");
1789 case SMB2_SHARE_TYPE_PRINT:
1791 cifs_dbg(FYI, "connection to printer\n");
1794 cifs_server_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
1796 goto tcon_error_exit;
1799 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
1800 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
1801 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1802 tcon->tidStatus = CifsGood;
1803 tcon->need_reconnect = false;
1804 tcon->tid = rsp->sync_hdr.TreeId;
1805 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
1807 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1808 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
1809 cifs_tcon_dbg(VFS, "DFS capability contradicts DFS flag\n");
1812 !(server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
1813 cifs_tcon_dbg(VFS, "Encryption is requested but not supported\n");
1815 init_copy_chunk_defaults(tcon);
1816 if (server->ops->validate_negotiate)
1817 rc = server->ops->validate_negotiate(xid, tcon);
1820 free_rsp_buf(resp_buftype, rsp);
1825 if (rsp && rsp->sync_hdr.Status == STATUS_BAD_NETWORK_NAME) {
1826 cifs_tcon_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
1832 SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1834 struct smb_rqst rqst;
1835 struct smb2_tree_disconnect_req *req; /* response is trivial */
1837 struct cifs_ses *ses = tcon->ses;
1839 unsigned int total_len;
1841 struct kvec rsp_iov;
1844 cifs_dbg(FYI, "Tree Disconnect\n");
1846 if (!ses || !(ses->server))
1849 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1852 close_shroot_lease(&tcon->crfid);
1854 rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, ses->server,
1860 if (smb3_encryption_required(tcon))
1861 flags |= CIFS_TRANSFORM_REQ;
1863 flags |= CIFS_NO_RSP_BUF;
1865 iov[0].iov_base = (char *)req;
1866 iov[0].iov_len = total_len;
1868 memset(&rqst, 0, sizeof(struct smb_rqst));
1872 rc = cifs_send_recv(xid, ses, ses->server,
1873 &rqst, &resp_buf_type, flags, &rsp_iov);
1874 cifs_small_buf_release(req);
1876 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1882 static struct create_durable *
1883 create_durable_buf(void)
1885 struct create_durable *buf;
1887 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1891 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1892 (struct create_durable, Data));
1893 buf->ccontext.DataLength = cpu_to_le32(16);
1894 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1895 (struct create_durable, Name));
1896 buf->ccontext.NameLength = cpu_to_le16(4);
1897 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1905 static struct create_durable *
1906 create_reconnect_durable_buf(struct cifs_fid *fid)
1908 struct create_durable *buf;
1910 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1914 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1915 (struct create_durable, Data));
1916 buf->ccontext.DataLength = cpu_to_le32(16);
1917 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1918 (struct create_durable, Name));
1919 buf->ccontext.NameLength = cpu_to_le16(4);
1920 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1921 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
1922 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1931 parse_query_id_ctxt(struct create_context *cc, struct smb2_file_all_info *buf)
1933 struct create_on_disk_id *pdisk_id = (struct create_on_disk_id *)cc;
1935 cifs_dbg(FYI, "parse query id context 0x%llx 0x%llx\n",
1936 pdisk_id->DiskFileId, pdisk_id->VolumeId);
1937 buf->IndexNumber = pdisk_id->DiskFileId;
1941 parse_posix_ctxt(struct create_context *cc, struct smb2_file_all_info *info,
1942 struct create_posix_rsp *posix)
1945 u8 *beg = (u8 *)cc + le16_to_cpu(cc->DataOffset);
1946 u8 *end = beg + le32_to_cpu(cc->DataLength);
1949 memset(posix, 0, sizeof(*posix));
1951 posix->nlink = le32_to_cpu(*(__le32 *)(beg + 0));
1952 posix->reparse_tag = le32_to_cpu(*(__le32 *)(beg + 4));
1953 posix->mode = le32_to_cpu(*(__le32 *)(beg + 8));
1956 sid_len = posix_info_sid_size(sid, end);
1958 cifs_dbg(VFS, "bad owner sid in posix create response\n");
1961 memcpy(&posix->owner, sid, sid_len);
1963 sid = sid + sid_len;
1964 sid_len = posix_info_sid_size(sid, end);
1966 cifs_dbg(VFS, "bad group sid in posix create response\n");
1969 memcpy(&posix->group, sid, sid_len);
1971 cifs_dbg(FYI, "nlink=%d mode=%o reparse_tag=%x\n",
1972 posix->nlink, posix->mode, posix->reparse_tag);
1976 smb2_parse_contexts(struct TCP_Server_Info *server,
1977 struct smb2_create_rsp *rsp,
1978 unsigned int *epoch, char *lease_key, __u8 *oplock,
1979 struct smb2_file_all_info *buf,
1980 struct create_posix_rsp *posix)
1983 struct create_context *cc;
1985 unsigned int remaining;
1987 static const char smb3_create_tag_posix[] = {
1988 0x93, 0xAD, 0x25, 0x50, 0x9C,
1989 0xB4, 0x11, 0xE7, 0xB4, 0x23, 0x83,
1990 0xDE, 0x96, 0x8B, 0xCD, 0x7C
1994 data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset);
1995 remaining = le32_to_cpu(rsp->CreateContextsLength);
1996 cc = (struct create_context *)data_offset;
1998 /* Initialize inode number to 0 in case no valid data in qfid context */
2000 buf->IndexNumber = 0;
2002 while (remaining >= sizeof(struct create_context)) {
2003 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
2004 if (le16_to_cpu(cc->NameLength) == 4 &&
2005 strncmp(name, SMB2_CREATE_REQUEST_LEASE, 4) == 0)
2006 *oplock = server->ops->parse_lease_buf(cc, epoch,
2008 else if (buf && (le16_to_cpu(cc->NameLength) == 4) &&
2009 strncmp(name, SMB2_CREATE_QUERY_ON_DISK_ID, 4) == 0)
2010 parse_query_id_ctxt(cc, buf);
2011 else if ((le16_to_cpu(cc->NameLength) == 16)) {
2013 memcmp(name, smb3_create_tag_posix, 16) == 0)
2014 parse_posix_ctxt(cc, buf, posix);
2017 cifs_dbg(FYI, "Context not matched with len %d\n",
2018 le16_to_cpu(cc->NameLength));
2019 cifs_dump_mem("Cctxt name: ", name, 4);
2022 next = le32_to_cpu(cc->Next);
2026 cc = (struct create_context *)((char *)cc + next);
2029 if (rsp->OplockLevel != SMB2_OPLOCK_LEVEL_LEASE)
2030 *oplock = rsp->OplockLevel;
2036 add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
2037 unsigned int *num_iovec, u8 *lease_key, __u8 *oplock)
2039 struct smb2_create_req *req = iov[0].iov_base;
2040 unsigned int num = *num_iovec;
2042 iov[num].iov_base = server->ops->create_lease_buf(lease_key, *oplock);
2043 if (iov[num].iov_base == NULL)
2045 iov[num].iov_len = server->vals->create_lease_size;
2046 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
2047 if (!req->CreateContextsOffset)
2048 req->CreateContextsOffset = cpu_to_le32(
2049 sizeof(struct smb2_create_req) +
2050 iov[num - 1].iov_len);
2051 le32_add_cpu(&req->CreateContextsLength,
2052 server->vals->create_lease_size);
2053 *num_iovec = num + 1;
2057 static struct create_durable_v2 *
2058 create_durable_v2_buf(struct cifs_open_parms *oparms)
2060 struct cifs_fid *pfid = oparms->fid;
2061 struct create_durable_v2 *buf;
2063 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
2067 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2068 (struct create_durable_v2, dcontext));
2069 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
2070 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2071 (struct create_durable_v2, Name));
2072 buf->ccontext.NameLength = cpu_to_le16(4);
2075 * NB: Handle timeout defaults to 0, which allows server to choose
2076 * (most servers default to 120 seconds) and most clients default to 0.
2077 * This can be overridden at mount ("handletimeout=") if the user wants
2078 * a different persistent (or resilient) handle timeout for all opens
2079 * opens on a particular SMB3 mount.
2081 buf->dcontext.Timeout = cpu_to_le32(oparms->tcon->handle_timeout);
2082 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
2083 generate_random_uuid(buf->dcontext.CreateGuid);
2084 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
2086 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
2094 static struct create_durable_handle_reconnect_v2 *
2095 create_reconnect_durable_v2_buf(struct cifs_fid *fid)
2097 struct create_durable_handle_reconnect_v2 *buf;
2099 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
2104 buf->ccontext.DataOffset =
2105 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
2107 buf->ccontext.DataLength =
2108 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
2109 buf->ccontext.NameOffset =
2110 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
2112 buf->ccontext.NameLength = cpu_to_le16(4);
2114 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
2115 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
2116 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
2117 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
2119 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
2128 add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
2129 struct cifs_open_parms *oparms)
2131 struct smb2_create_req *req = iov[0].iov_base;
2132 unsigned int num = *num_iovec;
2134 iov[num].iov_base = create_durable_v2_buf(oparms);
2135 if (iov[num].iov_base == NULL)
2137 iov[num].iov_len = sizeof(struct create_durable_v2);
2138 if (!req->CreateContextsOffset)
2139 req->CreateContextsOffset =
2140 cpu_to_le32(sizeof(struct smb2_create_req) +
2142 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
2143 *num_iovec = num + 1;
2148 add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
2149 struct cifs_open_parms *oparms)
2151 struct smb2_create_req *req = iov[0].iov_base;
2152 unsigned int num = *num_iovec;
2154 /* indicate that we don't need to relock the file */
2155 oparms->reconnect = false;
2157 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
2158 if (iov[num].iov_base == NULL)
2160 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
2161 if (!req->CreateContextsOffset)
2162 req->CreateContextsOffset =
2163 cpu_to_le32(sizeof(struct smb2_create_req) +
2165 le32_add_cpu(&req->CreateContextsLength,
2166 sizeof(struct create_durable_handle_reconnect_v2));
2167 *num_iovec = num + 1;
2172 add_durable_context(struct kvec *iov, unsigned int *num_iovec,
2173 struct cifs_open_parms *oparms, bool use_persistent)
2175 struct smb2_create_req *req = iov[0].iov_base;
2176 unsigned int num = *num_iovec;
2178 if (use_persistent) {
2179 if (oparms->reconnect)
2180 return add_durable_reconnect_v2_context(iov, num_iovec,
2183 return add_durable_v2_context(iov, num_iovec, oparms);
2186 if (oparms->reconnect) {
2187 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
2188 /* indicate that we don't need to relock the file */
2189 oparms->reconnect = false;
2191 iov[num].iov_base = create_durable_buf();
2192 if (iov[num].iov_base == NULL)
2194 iov[num].iov_len = sizeof(struct create_durable);
2195 if (!req->CreateContextsOffset)
2196 req->CreateContextsOffset =
2197 cpu_to_le32(sizeof(struct smb2_create_req) +
2199 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
2200 *num_iovec = num + 1;
2204 /* See MS-SMB2 2.2.13.2.7 */
2205 static struct crt_twarp_ctxt *
2206 create_twarp_buf(__u64 timewarp)
2208 struct crt_twarp_ctxt *buf;
2210 buf = kzalloc(sizeof(struct crt_twarp_ctxt), GFP_KERNEL);
2214 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2215 (struct crt_twarp_ctxt, Timestamp));
2216 buf->ccontext.DataLength = cpu_to_le32(8);
2217 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2218 (struct crt_twarp_ctxt, Name));
2219 buf->ccontext.NameLength = cpu_to_le16(4);
2220 /* SMB2_CREATE_TIMEWARP_TOKEN is "TWrp" */
2225 buf->Timestamp = cpu_to_le64(timewarp);
2229 /* See MS-SMB2 2.2.13.2.7 */
2231 add_twarp_context(struct kvec *iov, unsigned int *num_iovec, __u64 timewarp)
2233 struct smb2_create_req *req = iov[0].iov_base;
2234 unsigned int num = *num_iovec;
2236 iov[num].iov_base = create_twarp_buf(timewarp);
2237 if (iov[num].iov_base == NULL)
2239 iov[num].iov_len = sizeof(struct crt_twarp_ctxt);
2240 if (!req->CreateContextsOffset)
2241 req->CreateContextsOffset = cpu_to_le32(
2242 sizeof(struct smb2_create_req) +
2243 iov[num - 1].iov_len);
2244 le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_twarp_ctxt));
2245 *num_iovec = num + 1;
2249 /* See See http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx */
2250 static void setup_owner_group_sids(char *buf)
2252 struct owner_group_sids *sids = (struct owner_group_sids *)buf;
2254 /* Populate the user ownership fields S-1-5-88-1 */
2255 sids->owner.Revision = 1;
2256 sids->owner.NumAuth = 3;
2257 sids->owner.Authority[5] = 5;
2258 sids->owner.SubAuthorities[0] = cpu_to_le32(88);
2259 sids->owner.SubAuthorities[1] = cpu_to_le32(1);
2260 sids->owner.SubAuthorities[2] = cpu_to_le32(current_fsuid().val);
2262 /* Populate the group ownership fields S-1-5-88-2 */
2263 sids->group.Revision = 1;
2264 sids->group.NumAuth = 3;
2265 sids->group.Authority[5] = 5;
2266 sids->group.SubAuthorities[0] = cpu_to_le32(88);
2267 sids->group.SubAuthorities[1] = cpu_to_le32(2);
2268 sids->group.SubAuthorities[2] = cpu_to_le32(current_fsgid().val);
2270 cifs_dbg(FYI, "owner S-1-5-88-1-%d, group S-1-5-88-2-%d\n", current_fsuid().val, current_fsgid().val);
2273 /* See MS-SMB2 2.2.13.2.2 and MS-DTYP 2.4.6 */
2274 static struct crt_sd_ctxt *
2275 create_sd_buf(umode_t mode, bool set_owner, unsigned int *len)
2277 struct crt_sd_ctxt *buf;
2279 unsigned int acelen, acl_size, ace_count;
2280 unsigned int owner_offset = 0;
2281 unsigned int group_offset = 0;
2282 struct smb3_acl acl;
2284 *len = roundup(sizeof(struct crt_sd_ctxt) + (sizeof(struct cifs_ace) * 4), 8);
2287 /* sizeof(struct owner_group_sids) is already multiple of 8 so no need to round */
2288 *len += sizeof(struct owner_group_sids);
2291 buf = kzalloc(*len, GFP_KERNEL);
2295 ptr = (__u8 *)&buf[1];
2297 /* offset fields are from beginning of security descriptor not of create context */
2298 owner_offset = ptr - (__u8 *)&buf->sd;
2299 buf->sd.OffsetOwner = cpu_to_le32(owner_offset);
2300 group_offset = owner_offset + offsetof(struct owner_group_sids, group);
2301 buf->sd.OffsetGroup = cpu_to_le32(group_offset);
2303 setup_owner_group_sids(ptr);
2304 ptr += sizeof(struct owner_group_sids);
2306 buf->sd.OffsetOwner = 0;
2307 buf->sd.OffsetGroup = 0;
2310 buf->ccontext.DataOffset = cpu_to_le16(offsetof(struct crt_sd_ctxt, sd));
2311 buf->ccontext.NameOffset = cpu_to_le16(offsetof(struct crt_sd_ctxt, Name));
2312 buf->ccontext.NameLength = cpu_to_le16(4);
2313 /* SMB2_CREATE_SD_BUFFER_TOKEN is "SecD" */
2318 buf->sd.Revision = 1; /* Must be one see MS-DTYP 2.4.6 */
2321 * ACL is "self relative" ie ACL is stored in contiguous block of memory
2322 * and "DP" ie the DACL is present
2324 buf->sd.Control = cpu_to_le16(ACL_CONTROL_SR | ACL_CONTROL_DP);
2326 /* offset owner, group and Sbz1 and SACL are all zero */
2327 buf->sd.OffsetDacl = cpu_to_le32(ptr - (__u8 *)&buf->sd);
2328 /* Ship the ACL for now. we will copy it into buf later. */
2330 ptr += sizeof(struct cifs_acl);
2332 /* create one ACE to hold the mode embedded in reserved special SID */
2333 acelen = setup_special_mode_ACE((struct cifs_ace *)ptr, (__u64)mode);
2335 acl_size = acelen + sizeof(struct smb3_acl);
2339 /* we do not need to reallocate buffer to add the two more ACEs. plenty of space */
2340 acelen = setup_special_user_owner_ACE((struct cifs_ace *)ptr);
2346 /* and one more ACE to allow access for authenticated users */
2347 acelen = setup_authusers_ACE((struct cifs_ace *)ptr);
2352 acl.AclRevision = ACL_REVISION; /* See 2.4.4.1 of MS-DTYP */
2353 acl.AclSize = cpu_to_le16(acl_size);
2354 acl.AceCount = cpu_to_le16(ace_count);
2355 memcpy(aclptr, &acl, sizeof(struct cifs_acl));
2357 buf->ccontext.DataLength = cpu_to_le32(ptr - (__u8 *)&buf->sd);
2358 *len = ptr - (__u8 *)buf;
2364 add_sd_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode, bool set_owner)
2366 struct smb2_create_req *req = iov[0].iov_base;
2367 unsigned int num = *num_iovec;
2368 unsigned int len = 0;
2370 iov[num].iov_base = create_sd_buf(mode, set_owner, &len);
2371 if (iov[num].iov_base == NULL)
2373 iov[num].iov_len = len;
2374 if (!req->CreateContextsOffset)
2375 req->CreateContextsOffset = cpu_to_le32(
2376 sizeof(struct smb2_create_req) +
2377 iov[num - 1].iov_len);
2378 le32_add_cpu(&req->CreateContextsLength, len);
2379 *num_iovec = num + 1;
2383 static struct crt_query_id_ctxt *
2384 create_query_id_buf(void)
2386 struct crt_query_id_ctxt *buf;
2388 buf = kzalloc(sizeof(struct crt_query_id_ctxt), GFP_KERNEL);
2392 buf->ccontext.DataOffset = cpu_to_le16(0);
2393 buf->ccontext.DataLength = cpu_to_le32(0);
2394 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2395 (struct crt_query_id_ctxt, Name));
2396 buf->ccontext.NameLength = cpu_to_le16(4);
2397 /* SMB2_CREATE_QUERY_ON_DISK_ID is "QFid" */
2405 /* See MS-SMB2 2.2.13.2.9 */
2407 add_query_id_context(struct kvec *iov, unsigned int *num_iovec)
2409 struct smb2_create_req *req = iov[0].iov_base;
2410 unsigned int num = *num_iovec;
2412 iov[num].iov_base = create_query_id_buf();
2413 if (iov[num].iov_base == NULL)
2415 iov[num].iov_len = sizeof(struct crt_query_id_ctxt);
2416 if (!req->CreateContextsOffset)
2417 req->CreateContextsOffset = cpu_to_le32(
2418 sizeof(struct smb2_create_req) +
2419 iov[num - 1].iov_len);
2420 le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_query_id_ctxt));
2421 *num_iovec = num + 1;
2426 alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
2427 const char *treename, const __le16 *path)
2429 int treename_len, path_len;
2430 struct nls_table *cp;
2431 const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
2436 treename_len = strlen(treename);
2437 if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\'))
2443 path_len = UniStrnlen((wchar_t *)path, PATH_MAX);
2446 * make room for one path separator between the treename and
2449 *out_len = treename_len + 1 + path_len;
2452 * final path needs to be null-terminated UTF16 with a
2456 *out_size = roundup((*out_len+1)*2, 8);
2457 *out_path = kzalloc(*out_size, GFP_KERNEL);
2461 cp = load_nls_default();
2462 cifs_strtoUTF16(*out_path, treename, treename_len, cp);
2463 UniStrcat(*out_path, sep);
2464 UniStrcat(*out_path, path);
2470 int smb311_posix_mkdir(const unsigned int xid, struct inode *inode,
2471 umode_t mode, struct cifs_tcon *tcon,
2472 const char *full_path,
2473 struct cifs_sb_info *cifs_sb)
2475 struct smb_rqst rqst;
2476 struct smb2_create_req *req;
2477 struct smb2_create_rsp *rsp = NULL;
2478 struct cifs_ses *ses = tcon->ses;
2479 struct kvec iov[3]; /* make sure at least one for each open context */
2480 struct kvec rsp_iov = {NULL, 0};
2483 __le16 *copy_path = NULL;
2486 unsigned int n_iov = 2;
2487 __u32 file_attributes = 0;
2488 char *pc_buf = NULL;
2490 unsigned int total_len;
2491 __le16 *utf16_path = NULL;
2492 struct TCP_Server_Info *server = cifs_pick_channel(ses);
2494 cifs_dbg(FYI, "mkdir\n");
2496 /* resource #1: path allocation */
2497 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2501 if (!ses || !server) {
2506 /* resource #2: request */
2507 rc = smb2_plain_req_init(SMB2_CREATE, tcon, server,
2508 (void **) &req, &total_len);
2513 if (smb3_encryption_required(tcon))
2514 flags |= CIFS_TRANSFORM_REQ;
2516 req->ImpersonationLevel = IL_IMPERSONATION;
2517 req->DesiredAccess = cpu_to_le32(FILE_WRITE_ATTRIBUTES);
2518 /* File attributes ignored on open (used in create though) */
2519 req->FileAttributes = cpu_to_le32(file_attributes);
2520 req->ShareAccess = FILE_SHARE_ALL_LE;
2521 req->CreateDisposition = cpu_to_le32(FILE_CREATE);
2522 req->CreateOptions = cpu_to_le32(CREATE_NOT_FILE);
2524 iov[0].iov_base = (char *)req;
2525 /* -1 since last byte is buf[0] which is sent below (path) */
2526 iov[0].iov_len = total_len - 1;
2528 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
2530 /* [MS-SMB2] 2.2.13 NameOffset:
2531 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2532 * the SMB2 header, the file name includes a prefix that will
2533 * be processed during DFS name normalization as specified in
2534 * section 3.3.5.9. Otherwise, the file name is relative to
2535 * the share that is identified by the TreeId in the SMB2
2538 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
2541 req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
2542 rc = alloc_path_with_tree_prefix(©_path, ©_size,
2544 tcon->treeName, utf16_path);
2548 req->NameLength = cpu_to_le16(name_len * 2);
2549 uni_path_len = copy_size;
2550 /* free before overwriting resource */
2552 utf16_path = copy_path;
2554 uni_path_len = (2 * UniStrnlen((wchar_t *)utf16_path, PATH_MAX)) + 2;
2555 /* MUST set path len (NameLength) to 0 opening root of share */
2556 req->NameLength = cpu_to_le16(uni_path_len - 2);
2557 if (uni_path_len % 8 != 0) {
2558 copy_size = roundup(uni_path_len, 8);
2559 copy_path = kzalloc(copy_size, GFP_KERNEL);
2564 memcpy((char *)copy_path, (const char *)utf16_path,
2566 uni_path_len = copy_size;
2567 /* free before overwriting resource */
2569 utf16_path = copy_path;
2573 iov[1].iov_len = uni_path_len;
2574 iov[1].iov_base = utf16_path;
2575 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2577 if (tcon->posix_extensions) {
2578 /* resource #3: posix buf */
2579 rc = add_posix_context(iov, &n_iov, mode);
2582 pc_buf = iov[n_iov-1].iov_base;
2586 memset(&rqst, 0, sizeof(struct smb_rqst));
2588 rqst.rq_nvec = n_iov;
2590 /* no need to inc num_remote_opens because we close it just below */
2591 trace_smb3_posix_mkdir_enter(xid, tcon->tid, ses->Suid, CREATE_NOT_FILE,
2592 FILE_WRITE_ATTRIBUTES);
2593 /* resource #4: response buffer */
2594 rc = cifs_send_recv(xid, ses, server,
2595 &rqst, &resp_buftype, flags, &rsp_iov);
2597 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
2598 trace_smb3_posix_mkdir_err(xid, tcon->tid, ses->Suid,
2600 FILE_WRITE_ATTRIBUTES, rc);
2601 goto err_free_rsp_buf;
2604 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2605 trace_smb3_posix_mkdir_done(xid, rsp->PersistentFileId, tcon->tid,
2606 ses->Suid, CREATE_NOT_FILE,
2607 FILE_WRITE_ATTRIBUTES);
2609 SMB2_close(xid, tcon, rsp->PersistentFileId, rsp->VolatileFileId);
2611 /* Eventually save off posix specific response info and timestaps */
2614 free_rsp_buf(resp_buftype, rsp);
2617 cifs_small_buf_release(req);
2624 SMB2_open_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
2625 struct smb_rqst *rqst, __u8 *oplock,
2626 struct cifs_open_parms *oparms, __le16 *path)
2628 struct smb2_create_req *req;
2629 unsigned int n_iov = 2;
2630 __u32 file_attributes = 0;
2633 unsigned int total_len;
2634 struct kvec *iov = rqst->rq_iov;
2638 rc = smb2_plain_req_init(SMB2_CREATE, tcon, server,
2639 (void **) &req, &total_len);
2643 iov[0].iov_base = (char *)req;
2644 /* -1 since last byte is buf[0] which is sent below (path) */
2645 iov[0].iov_len = total_len - 1;
2647 if (oparms->create_options & CREATE_OPTION_READONLY)
2648 file_attributes |= ATTR_READONLY;
2649 if (oparms->create_options & CREATE_OPTION_SPECIAL)
2650 file_attributes |= ATTR_SYSTEM;
2652 req->ImpersonationLevel = IL_IMPERSONATION;
2653 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
2654 /* File attributes ignored on open (used in create though) */
2655 req->FileAttributes = cpu_to_le32(file_attributes);
2656 req->ShareAccess = FILE_SHARE_ALL_LE;
2658 req->CreateDisposition = cpu_to_le32(oparms->disposition);
2659 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
2660 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
2662 /* [MS-SMB2] 2.2.13 NameOffset:
2663 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2664 * the SMB2 header, the file name includes a prefix that will
2665 * be processed during DFS name normalization as specified in
2666 * section 3.3.5.9. Otherwise, the file name is relative to
2667 * the share that is identified by the TreeId in the SMB2
2670 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
2673 req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
2674 rc = alloc_path_with_tree_prefix(©_path, ©_size,
2676 tcon->treeName, path);
2679 req->NameLength = cpu_to_le16(name_len * 2);
2680 uni_path_len = copy_size;
2683 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
2684 /* MUST set path len (NameLength) to 0 opening root of share */
2685 req->NameLength = cpu_to_le16(uni_path_len - 2);
2686 copy_size = uni_path_len;
2687 if (copy_size % 8 != 0)
2688 copy_size = roundup(copy_size, 8);
2689 copy_path = kzalloc(copy_size, GFP_KERNEL);
2692 memcpy((char *)copy_path, (const char *)path,
2694 uni_path_len = copy_size;
2698 iov[1].iov_len = uni_path_len;
2699 iov[1].iov_base = path;
2701 if ((!server->oplocks) || (tcon->no_lease))
2702 *oplock = SMB2_OPLOCK_LEVEL_NONE;
2704 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
2705 *oplock == SMB2_OPLOCK_LEVEL_NONE)
2706 req->RequestedOplockLevel = *oplock;
2707 else if (!(server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING) &&
2708 (oparms->create_options & CREATE_NOT_FILE))
2709 req->RequestedOplockLevel = *oplock; /* no srv lease support */
2711 rc = add_lease_context(server, iov, &n_iov,
2712 oparms->fid->lease_key, oplock);
2717 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
2718 /* need to set Next field of lease context if we request it */
2719 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
2720 struct create_context *ccontext =
2721 (struct create_context *)iov[n_iov-1].iov_base;
2723 cpu_to_le32(server->vals->create_lease_size);
2726 rc = add_durable_context(iov, &n_iov, oparms,
2727 tcon->use_persistent);
2732 if (tcon->posix_extensions) {
2734 struct create_context *ccontext =
2735 (struct create_context *)iov[n_iov-1].iov_base;
2737 cpu_to_le32(iov[n_iov-1].iov_len);
2740 rc = add_posix_context(iov, &n_iov, oparms->mode);
2745 if (tcon->snapshot_time) {
2746 cifs_dbg(FYI, "adding snapshot context\n");
2748 struct create_context *ccontext =
2749 (struct create_context *)iov[n_iov-1].iov_base;
2751 cpu_to_le32(iov[n_iov-1].iov_len);
2754 rc = add_twarp_context(iov, &n_iov, tcon->snapshot_time);
2759 if ((oparms->disposition != FILE_OPEN) && (oparms->cifs_sb)) {
2763 if ((oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) &&
2764 (oparms->mode != ACL_NO_MODE))
2768 oparms->mode = ACL_NO_MODE;
2771 if (oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL)
2776 if (set_owner | set_mode) {
2778 struct create_context *ccontext =
2779 (struct create_context *)iov[n_iov-1].iov_base;
2780 ccontext->Next = cpu_to_le32(iov[n_iov-1].iov_len);
2783 cifs_dbg(FYI, "add sd with mode 0x%x\n", oparms->mode);
2784 rc = add_sd_context(iov, &n_iov, oparms->mode, set_owner);
2791 struct create_context *ccontext =
2792 (struct create_context *)iov[n_iov-1].iov_base;
2793 ccontext->Next = cpu_to_le32(iov[n_iov-1].iov_len);
2795 add_query_id_context(iov, &n_iov);
2797 rqst->rq_nvec = n_iov;
2801 /* rq_iov[0] is the request and is released by cifs_small_buf_release().
2802 * All other vectors are freed by kfree().
2805 SMB2_open_free(struct smb_rqst *rqst)
2809 if (rqst && rqst->rq_iov) {
2810 cifs_small_buf_release(rqst->rq_iov[0].iov_base);
2811 for (i = 1; i < rqst->rq_nvec; i++)
2812 if (rqst->rq_iov[i].iov_base != smb2_padding)
2813 kfree(rqst->rq_iov[i].iov_base);
2818 SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
2819 __u8 *oplock, struct smb2_file_all_info *buf,
2820 struct create_posix_rsp *posix,
2821 struct kvec *err_iov, int *buftype)
2823 struct smb_rqst rqst;
2824 struct smb2_create_rsp *rsp = NULL;
2825 struct cifs_tcon *tcon = oparms->tcon;
2826 struct cifs_ses *ses = tcon->ses;
2827 struct TCP_Server_Info *server = cifs_pick_channel(ses);
2828 struct kvec iov[SMB2_CREATE_IOV_SIZE];
2829 struct kvec rsp_iov = {NULL, 0};
2830 int resp_buftype = CIFS_NO_BUFFER;
2834 cifs_dbg(FYI, "create/open\n");
2835 if (!ses || !server)
2838 if (smb3_encryption_required(tcon))
2839 flags |= CIFS_TRANSFORM_REQ;
2841 memset(&rqst, 0, sizeof(struct smb_rqst));
2842 memset(&iov, 0, sizeof(iov));
2844 rqst.rq_nvec = SMB2_CREATE_IOV_SIZE;
2846 rc = SMB2_open_init(tcon, server,
2847 &rqst, oplock, oparms, path);
2851 trace_smb3_open_enter(xid, tcon->tid, tcon->ses->Suid,
2852 oparms->create_options, oparms->desired_access);
2854 rc = cifs_send_recv(xid, ses, server,
2855 &rqst, &resp_buftype, flags,
2857 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
2860 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
2861 if (err_iov && rsp) {
2863 *buftype = resp_buftype;
2864 resp_buftype = CIFS_NO_BUFFER;
2867 trace_smb3_open_err(xid, tcon->tid, ses->Suid,
2868 oparms->create_options, oparms->desired_access, rc);
2869 if (rc == -EREMCHG) {
2870 pr_warn_once("server share %s deleted\n",
2872 tcon->need_reconnect = true;
2876 trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid,
2877 ses->Suid, oparms->create_options,
2878 oparms->desired_access);
2880 atomic_inc(&tcon->num_remote_opens);
2881 oparms->fid->persistent_fid = rsp->PersistentFileId;
2882 oparms->fid->volatile_fid = rsp->VolatileFileId;
2883 oparms->fid->access = oparms->desired_access;
2884 #ifdef CONFIG_CIFS_DEBUG2
2885 oparms->fid->mid = le64_to_cpu(rsp->sync_hdr.MessageId);
2886 #endif /* CIFS_DEBUG2 */
2889 memcpy(buf, &rsp->CreationTime, 32);
2890 buf->AllocationSize = rsp->AllocationSize;
2891 buf->EndOfFile = rsp->EndofFile;
2892 buf->Attributes = rsp->FileAttributes;
2893 buf->NumberOfLinks = cpu_to_le32(1);
2894 buf->DeletePending = 0;
2898 smb2_parse_contexts(server, rsp, &oparms->fid->epoch,
2899 oparms->fid->lease_key, oplock, buf, posix);
2901 SMB2_open_free(&rqst);
2902 free_rsp_buf(resp_buftype, rsp);
2907 SMB2_ioctl_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
2908 struct smb_rqst *rqst,
2909 u64 persistent_fid, u64 volatile_fid, u32 opcode,
2910 bool is_fsctl, char *in_data, u32 indatalen,
2911 __u32 max_response_size)
2913 struct smb2_ioctl_req *req;
2914 struct kvec *iov = rqst->rq_iov;
2915 unsigned int total_len;
2919 rc = smb2_ioctl_req_init(opcode, tcon, server,
2920 (void **) &req, &total_len);
2926 * indatalen is usually small at a couple of bytes max, so
2927 * just allocate through generic pool
2929 in_data_buf = kmemdup(in_data, indatalen, GFP_NOFS);
2931 cifs_small_buf_release(req);
2936 req->CtlCode = cpu_to_le32(opcode);
2937 req->PersistentFileId = persistent_fid;
2938 req->VolatileFileId = volatile_fid;
2940 iov[0].iov_base = (char *)req;
2942 * If no input data, the size of ioctl struct in
2943 * protocol spec still includes a 1 byte data buffer,
2944 * but if input data passed to ioctl, we do not
2945 * want to double count this, so we do not send
2946 * the dummy one byte of data in iovec[0] if sending
2947 * input data (in iovec[1]).
2950 req->InputCount = cpu_to_le32(indatalen);
2951 /* do not set InputOffset if no input data */
2953 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer));
2955 iov[0].iov_len = total_len - 1;
2956 iov[1].iov_base = in_data_buf;
2957 iov[1].iov_len = indatalen;
2960 iov[0].iov_len = total_len;
2963 req->OutputOffset = 0;
2964 req->OutputCount = 0; /* MBZ */
2967 * In most cases max_response_size is set to 16K (CIFSMaxBufSize)
2968 * We Could increase default MaxOutputResponse, but that could require
2969 * more credits. Windows typically sets this smaller, but for some
2970 * ioctls it may be useful to allow server to send more. No point
2971 * limiting what the server can send as long as fits in one credit
2972 * We can not handle more than CIFS_MAX_BUF_SIZE yet but may want
2973 * to increase this limit up in the future.
2974 * Note that for snapshot queries that servers like Azure expect that
2975 * the first query be minimal size (and just used to get the number/size
2976 * of previous versions) so response size must be specified as EXACTLY
2977 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2978 * of eight bytes. Currently that is the only case where we set max
2979 * response size smaller.
2981 req->MaxOutputResponse = cpu_to_le32(max_response_size);
2982 req->sync_hdr.CreditCharge =
2983 cpu_to_le16(DIV_ROUND_UP(max(indatalen, max_response_size),
2984 SMB2_MAX_BUFFER_SIZE));
2986 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
2990 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
2991 if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO)
2992 req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
2998 SMB2_ioctl_free(struct smb_rqst *rqst)
3001 if (rqst && rqst->rq_iov) {
3002 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
3003 for (i = 1; i < rqst->rq_nvec; i++)
3004 if (rqst->rq_iov[i].iov_base != smb2_padding)
3005 kfree(rqst->rq_iov[i].iov_base);
3011 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
3014 SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
3015 u64 volatile_fid, u32 opcode, bool is_fsctl,
3016 char *in_data, u32 indatalen, u32 max_out_data_len,
3017 char **out_data, u32 *plen /* returned data len */)
3019 struct smb_rqst rqst;
3020 struct smb2_ioctl_rsp *rsp = NULL;
3021 struct cifs_ses *ses;
3022 struct TCP_Server_Info *server;
3023 struct kvec iov[SMB2_IOCTL_IOV_SIZE];
3024 struct kvec rsp_iov = {NULL, 0};
3025 int resp_buftype = CIFS_NO_BUFFER;
3029 cifs_dbg(FYI, "SMB2 IOCTL\n");
3031 if (out_data != NULL)
3034 /* zero out returned data len, in case of error */
3045 server = cifs_pick_channel(ses);
3049 if (smb3_encryption_required(tcon))
3050 flags |= CIFS_TRANSFORM_REQ;
3052 memset(&rqst, 0, sizeof(struct smb_rqst));
3053 memset(&iov, 0, sizeof(iov));
3055 rqst.rq_nvec = SMB2_IOCTL_IOV_SIZE;
3057 rc = SMB2_ioctl_init(tcon, server,
3058 &rqst, persistent_fid, volatile_fid, opcode,
3059 is_fsctl, in_data, indatalen, max_out_data_len);
3063 rc = cifs_send_recv(xid, ses, server,
3064 &rqst, &resp_buftype, flags,
3066 rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
3069 trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid,
3070 ses->Suid, 0, opcode, rc);
3072 if ((rc != 0) && (rc != -EINVAL) && (rc != -E2BIG)) {
3073 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
3075 } else if (rc == -EINVAL) {
3076 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
3077 (opcode != FSCTL_SRV_COPYCHUNK)) {
3078 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
3081 } else if (rc == -E2BIG) {
3082 if (opcode != FSCTL_QUERY_ALLOCATED_RANGES) {
3083 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
3088 /* check if caller wants to look at return data or just return rc */
3089 if ((plen == NULL) || (out_data == NULL))
3092 *plen = le32_to_cpu(rsp->OutputCount);
3094 /* We check for obvious errors in the output buffer length and offset */
3096 goto ioctl_exit; /* server returned no data */
3097 else if (*plen > rsp_iov.iov_len || *plen > 0xFF00) {
3098 cifs_tcon_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
3104 if (rsp_iov.iov_len - *plen < le32_to_cpu(rsp->OutputOffset)) {
3105 cifs_tcon_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
3106 le32_to_cpu(rsp->OutputOffset));
3112 *out_data = kmemdup((char *)rsp + le32_to_cpu(rsp->OutputOffset),
3114 if (*out_data == NULL) {
3120 SMB2_ioctl_free(&rqst);
3121 free_rsp_buf(resp_buftype, rsp);
3126 * Individual callers to ioctl worker function follow
3130 SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
3131 u64 persistent_fid, u64 volatile_fid)
3134 struct compress_ioctl fsctl_input;
3135 char *ret_data = NULL;
3137 fsctl_input.CompressionState =
3138 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
3140 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
3141 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
3142 (char *)&fsctl_input /* data input */,
3143 2 /* in data len */, CIFSMaxBufSize /* max out data */,
3144 &ret_data /* out data */, NULL);
3146 cifs_dbg(FYI, "set compression rc %d\n", rc);
3152 SMB2_close_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
3153 struct smb_rqst *rqst,
3154 u64 persistent_fid, u64 volatile_fid, bool query_attrs)
3156 struct smb2_close_req *req;
3157 struct kvec *iov = rqst->rq_iov;
3158 unsigned int total_len;
3161 rc = smb2_plain_req_init(SMB2_CLOSE, tcon, server,
3162 (void **) &req, &total_len);
3166 req->PersistentFileId = persistent_fid;
3167 req->VolatileFileId = volatile_fid;
3169 req->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
3172 iov[0].iov_base = (char *)req;
3173 iov[0].iov_len = total_len;
3179 SMB2_close_free(struct smb_rqst *rqst)
3181 if (rqst && rqst->rq_iov)
3182 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
3186 __SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
3187 u64 persistent_fid, u64 volatile_fid,
3188 struct smb2_file_network_open_info *pbuf)
3190 struct smb_rqst rqst;
3191 struct smb2_close_rsp *rsp = NULL;
3192 struct cifs_ses *ses = tcon->ses;
3193 struct TCP_Server_Info *server = cifs_pick_channel(ses);
3195 struct kvec rsp_iov;
3196 int resp_buftype = CIFS_NO_BUFFER;
3199 bool query_attrs = false;
3201 cifs_dbg(FYI, "Close\n");
3203 if (!ses || !server)
3206 if (smb3_encryption_required(tcon))
3207 flags |= CIFS_TRANSFORM_REQ;
3209 memset(&rqst, 0, sizeof(struct smb_rqst));
3210 memset(&iov, 0, sizeof(iov));
3214 /* check if need to ask server to return timestamps in close response */
3218 trace_smb3_close_enter(xid, persistent_fid, tcon->tid, ses->Suid);
3219 rc = SMB2_close_init(tcon, server,
3220 &rqst, persistent_fid, volatile_fid,
3225 rc = cifs_send_recv(xid, ses, server,
3226 &rqst, &resp_buftype, flags, &rsp_iov);
3227 rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
3230 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
3231 trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid,
3235 trace_smb3_close_done(xid, persistent_fid, tcon->tid,
3238 * Note that have to subtract 4 since struct network_open_info
3239 * has a final 4 byte pad that close response does not have
3242 memcpy(pbuf, (char *)&rsp->CreationTime, sizeof(*pbuf) - 4);
3245 atomic_dec(&tcon->num_remote_opens);
3247 SMB2_close_free(&rqst);
3248 free_rsp_buf(resp_buftype, rsp);
3250 /* retry close in a worker thread if this one is interrupted */
3254 tmp_rc = smb2_handle_cancelled_close(tcon, persistent_fid,
3257 cifs_dbg(VFS, "handle cancelled close fid 0x%llx returned error %d\n",
3258 persistent_fid, tmp_rc);
3264 SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
3265 u64 persistent_fid, u64 volatile_fid)
3267 return __SMB2_close(xid, tcon, persistent_fid, volatile_fid, NULL);
3271 smb2_validate_iov(unsigned int offset, unsigned int buffer_length,
3272 struct kvec *iov, unsigned int min_buf_size)
3274 unsigned int smb_len = iov->iov_len;
3275 char *end_of_smb = smb_len + (char *)iov->iov_base;
3276 char *begin_of_buf = offset + (char *)iov->iov_base;
3277 char *end_of_buf = begin_of_buf + buffer_length;
3280 if (buffer_length < min_buf_size) {
3281 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
3282 buffer_length, min_buf_size);
3286 /* check if beyond RFC1001 maximum length */
3287 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
3288 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
3289 buffer_length, smb_len);
3293 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
3294 cifs_dbg(VFS, "Invalid server response, bad offset to data\n");
3302 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
3303 * Caller must free buffer.
3306 smb2_validate_and_copy_iov(unsigned int offset, unsigned int buffer_length,
3307 struct kvec *iov, unsigned int minbufsize,
3310 char *begin_of_buf = offset + (char *)iov->iov_base;
3316 rc = smb2_validate_iov(offset, buffer_length, iov, minbufsize);
3320 memcpy(data, begin_of_buf, buffer_length);
3326 SMB2_query_info_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
3327 struct smb_rqst *rqst,
3328 u64 persistent_fid, u64 volatile_fid,
3329 u8 info_class, u8 info_type, u32 additional_info,
3330 size_t output_len, size_t input_len, void *input)
3332 struct smb2_query_info_req *req;
3333 struct kvec *iov = rqst->rq_iov;
3334 unsigned int total_len;
3337 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, server,
3338 (void **) &req, &total_len);
3342 req->InfoType = info_type;
3343 req->FileInfoClass = info_class;
3344 req->PersistentFileId = persistent_fid;
3345 req->VolatileFileId = volatile_fid;
3346 req->AdditionalInformation = cpu_to_le32(additional_info);
3348 req->OutputBufferLength = cpu_to_le32(output_len);
3350 req->InputBufferLength = cpu_to_le32(input_len);
3351 /* total_len for smb query request never close to le16 max */
3352 req->InputBufferOffset = cpu_to_le16(total_len - 1);
3353 memcpy(req->Buffer, input, input_len);
3356 iov[0].iov_base = (char *)req;
3358 iov[0].iov_len = total_len - 1 + input_len;
3363 SMB2_query_info_free(struct smb_rqst *rqst)
3365 if (rqst && rqst->rq_iov)
3366 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
3370 query_info(const unsigned int xid, struct cifs_tcon *tcon,
3371 u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
3372 u32 additional_info, size_t output_len, size_t min_len, void **data,
3375 struct smb_rqst rqst;
3376 struct smb2_query_info_rsp *rsp = NULL;
3378 struct kvec rsp_iov;
3380 int resp_buftype = CIFS_NO_BUFFER;
3381 struct cifs_ses *ses = tcon->ses;
3382 struct TCP_Server_Info *server;
3384 bool allocated = false;
3386 cifs_dbg(FYI, "Query Info\n");
3390 server = cifs_pick_channel(ses);
3394 if (smb3_encryption_required(tcon))
3395 flags |= CIFS_TRANSFORM_REQ;
3397 memset(&rqst, 0, sizeof(struct smb_rqst));
3398 memset(&iov, 0, sizeof(iov));
3402 rc = SMB2_query_info_init(tcon, server,
3403 &rqst, persistent_fid, volatile_fid,
3404 info_class, info_type, additional_info,
3405 output_len, 0, NULL);
3409 trace_smb3_query_info_enter(xid, persistent_fid, tcon->tid,
3410 ses->Suid, info_class, (__u32)info_type);
3412 rc = cifs_send_recv(xid, ses, server,
3413 &rqst, &resp_buftype, flags, &rsp_iov);
3414 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
3417 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
3418 trace_smb3_query_info_err(xid, persistent_fid, tcon->tid,
3419 ses->Suid, info_class, (__u32)info_type, rc);
3423 trace_smb3_query_info_done(xid, persistent_fid, tcon->tid,
3424 ses->Suid, info_class, (__u32)info_type);
3427 *dlen = le32_to_cpu(rsp->OutputBufferLength);
3429 *data = kmalloc(*dlen, GFP_KERNEL);
3432 "Error %d allocating memory for acl\n",
3442 rc = smb2_validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset),
3443 le32_to_cpu(rsp->OutputBufferLength),
3444 &rsp_iov, min_len, *data);
3445 if (rc && allocated) {
3452 SMB2_query_info_free(&rqst);
3453 free_rsp_buf(resp_buftype, rsp);
3457 int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
3458 u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data)
3460 return query_info(xid, tcon, persistent_fid, volatile_fid,
3461 FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0,
3462 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
3463 sizeof(struct smb2_file_all_info), (void **)&data,
3468 SMB311_posix_query_info(const unsigned int xid, struct cifs_tcon *tcon,
3469 u64 persistent_fid, u64 volatile_fid, struct smb311_posix_qinfo *data, u32 *plen)
3471 size_t output_len = sizeof(struct smb311_posix_qinfo *) +
3472 (sizeof(struct cifs_sid) * 2) + (PATH_MAX * 2);
3475 return query_info(xid, tcon, persistent_fid, volatile_fid,
3476 SMB_FIND_FILE_POSIX_INFO, SMB2_O_INFO_FILE, 0,
3477 output_len, sizeof(struct smb311_posix_qinfo), (void **)&data, plen);
3481 SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
3482 u64 persistent_fid, u64 volatile_fid,
3483 void **data, u32 *plen)
3485 __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO;
3488 return query_info(xid, tcon, persistent_fid, volatile_fid,
3489 0, SMB2_O_INFO_SECURITY, additional_info,
3490 SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen);
3494 SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
3495 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
3497 return query_info(xid, tcon, persistent_fid, volatile_fid,
3498 FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0,
3499 sizeof(struct smb2_file_internal_info),
3500 sizeof(struct smb2_file_internal_info),
3501 (void **)&uniqueid, NULL);
3505 * CHANGE_NOTIFY Request is sent to get notifications on changes to a directory
3506 * See MS-SMB2 2.2.35 and 2.2.36
3510 SMB2_notify_init(const unsigned int xid, struct smb_rqst *rqst,
3511 struct cifs_tcon *tcon, struct TCP_Server_Info *server,
3512 u64 persistent_fid, u64 volatile_fid,
3513 u32 completion_filter, bool watch_tree)
3515 struct smb2_change_notify_req *req;
3516 struct kvec *iov = rqst->rq_iov;
3517 unsigned int total_len;
3520 rc = smb2_plain_req_init(SMB2_CHANGE_NOTIFY, tcon, server,
3521 (void **) &req, &total_len);
3525 req->PersistentFileId = persistent_fid;
3526 req->VolatileFileId = volatile_fid;
3527 /* See note 354 of MS-SMB2, 64K max */
3528 req->OutputBufferLength =
3529 cpu_to_le32(SMB2_MAX_BUFFER_SIZE - MAX_SMB2_HDR_SIZE);
3530 req->CompletionFilter = cpu_to_le32(completion_filter);
3532 req->Flags = cpu_to_le16(SMB2_WATCH_TREE);
3536 iov[0].iov_base = (char *)req;
3537 iov[0].iov_len = total_len;
3543 SMB2_change_notify(const unsigned int xid, struct cifs_tcon *tcon,
3544 u64 persistent_fid, u64 volatile_fid, bool watch_tree,
3545 u32 completion_filter)
3547 struct cifs_ses *ses = tcon->ses;
3548 struct TCP_Server_Info *server = cifs_pick_channel(ses);
3549 struct smb_rqst rqst;
3551 struct kvec rsp_iov = {NULL, 0};
3552 int resp_buftype = CIFS_NO_BUFFER;
3556 cifs_dbg(FYI, "change notify\n");
3557 if (!ses || !server)
3560 if (smb3_encryption_required(tcon))
3561 flags |= CIFS_TRANSFORM_REQ;
3563 memset(&rqst, 0, sizeof(struct smb_rqst));
3564 memset(&iov, 0, sizeof(iov));
3568 rc = SMB2_notify_init(xid, &rqst, tcon, server,
3569 persistent_fid, volatile_fid,
3570 completion_filter, watch_tree);
3574 trace_smb3_notify_enter(xid, persistent_fid, tcon->tid, ses->Suid,
3575 (u8)watch_tree, completion_filter);
3576 rc = cifs_send_recv(xid, ses, server,
3577 &rqst, &resp_buftype, flags, &rsp_iov);
3580 cifs_stats_fail_inc(tcon, SMB2_CHANGE_NOTIFY_HE);
3581 trace_smb3_notify_err(xid, persistent_fid, tcon->tid, ses->Suid,
3582 (u8)watch_tree, completion_filter, rc);
3584 trace_smb3_notify_done(xid, persistent_fid, tcon->tid,
3585 ses->Suid, (u8)watch_tree, completion_filter);
3589 cifs_small_buf_release(rqst.rq_iov[0].iov_base); /* request */
3590 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
3597 * This is a no-op for now. We're not really interested in the reply, but
3598 * rather in the fact that the server sent one and that server->lstrp
3601 * FIXME: maybe we should consider checking that the reply matches request?
3604 smb2_echo_callback(struct mid_q_entry *mid)
3606 struct TCP_Server_Info *server = mid->callback_data;
3607 struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
3608 struct cifs_credits credits = { .value = 0, .instance = 0 };
3610 if (mid->mid_state == MID_RESPONSE_RECEIVED
3611 || mid->mid_state == MID_RESPONSE_MALFORMED) {
3612 credits.value = le16_to_cpu(rsp->sync_hdr.CreditRequest);
3613 credits.instance = server->reconnect_instance;
3616 DeleteMidQEntry(mid);
3617 add_credits(server, &credits, CIFS_ECHO_OP);
3620 void smb2_reconnect_server(struct work_struct *work)
3622 struct TCP_Server_Info *server = container_of(work,
3623 struct TCP_Server_Info, reconnect.work);
3624 struct cifs_ses *ses;
3625 struct cifs_tcon *tcon, *tcon2;
3626 struct list_head tmp_list;
3627 int tcon_exist = false;
3629 int resched = false;
3632 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
3633 mutex_lock(&server->reconnect_mutex);
3635 INIT_LIST_HEAD(&tmp_list);
3636 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
3638 spin_lock(&cifs_tcp_ses_lock);
3639 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
3640 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
3641 if (tcon->need_reconnect || tcon->need_reopen_files) {
3643 list_add_tail(&tcon->rlist, &tmp_list);
3648 * IPC has the same lifetime as its session and uses its
3651 if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) {
3652 list_add_tail(&ses->tcon_ipc->rlist, &tmp_list);
3658 * Get the reference to server struct to be sure that the last call of
3659 * cifs_put_tcon() in the loop below won't release the server pointer.
3662 server->srv_count++;
3664 spin_unlock(&cifs_tcp_ses_lock);
3666 list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
3667 rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon, server);
3669 cifs_reopen_persistent_handles(tcon);
3672 list_del_init(&tcon->rlist);
3674 cifs_put_smb_ses(tcon->ses);
3676 cifs_put_tcon(tcon);
3679 cifs_dbg(FYI, "Reconnecting tcons finished\n");
3681 queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
3682 mutex_unlock(&server->reconnect_mutex);
3684 /* now we can safely release srv struct */
3686 cifs_put_tcp_session(server, 1);
3690 SMB2_echo(struct TCP_Server_Info *server)
3692 struct smb2_echo_req *req;
3695 struct smb_rqst rqst = { .rq_iov = iov,
3697 unsigned int total_len;
3699 cifs_dbg(FYI, "In echo request\n");
3701 if (server->tcpStatus == CifsNeedNegotiate) {
3702 /* No need to send echo on newly established connections */
3703 mod_delayed_work(cifsiod_wq, &server->reconnect, 0);
3707 rc = smb2_plain_req_init(SMB2_ECHO, NULL, server,
3708 (void **)&req, &total_len);
3712 req->sync_hdr.CreditRequest = cpu_to_le16(1);
3714 iov[0].iov_len = total_len;
3715 iov[0].iov_base = (char *)req;
3717 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
3718 server, CIFS_ECHO_OP, NULL);
3720 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
3722 cifs_small_buf_release(req);
3727 SMB2_flush_free(struct smb_rqst *rqst)
3729 if (rqst && rqst->rq_iov)
3730 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
3734 SMB2_flush_init(const unsigned int xid, struct smb_rqst *rqst,
3735 struct cifs_tcon *tcon, struct TCP_Server_Info *server,
3736 u64 persistent_fid, u64 volatile_fid)
3738 struct smb2_flush_req *req;
3739 struct kvec *iov = rqst->rq_iov;
3740 unsigned int total_len;
3743 rc = smb2_plain_req_init(SMB2_FLUSH, tcon, server,
3744 (void **) &req, &total_len);
3748 req->PersistentFileId = persistent_fid;
3749 req->VolatileFileId = volatile_fid;
3751 iov[0].iov_base = (char *)req;
3752 iov[0].iov_len = total_len;
3758 SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
3761 struct cifs_ses *ses = tcon->ses;
3762 struct smb_rqst rqst;
3764 struct kvec rsp_iov = {NULL, 0};
3765 struct TCP_Server_Info *server = cifs_pick_channel(ses);
3766 int resp_buftype = CIFS_NO_BUFFER;
3770 cifs_dbg(FYI, "flush\n");
3771 if (!ses || !(ses->server))
3774 if (smb3_encryption_required(tcon))
3775 flags |= CIFS_TRANSFORM_REQ;
3777 memset(&rqst, 0, sizeof(struct smb_rqst));
3778 memset(&iov, 0, sizeof(iov));
3782 rc = SMB2_flush_init(xid, &rqst, tcon, server,
3783 persistent_fid, volatile_fid);
3787 trace_smb3_flush_enter(xid, persistent_fid, tcon->tid, ses->Suid);
3788 rc = cifs_send_recv(xid, ses, server,
3789 &rqst, &resp_buftype, flags, &rsp_iov);
3792 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
3793 trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid,
3796 trace_smb3_flush_done(xid, persistent_fid, tcon->tid,
3800 SMB2_flush_free(&rqst);
3801 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
3806 * To form a chain of read requests, any read requests after the first should
3807 * have the end_of_chain boolean set to true.
3810 smb2_new_read_req(void **buf, unsigned int *total_len,
3811 struct cifs_io_parms *io_parms, struct cifs_readdata *rdata,
3812 unsigned int remaining_bytes, int request_type)
3815 struct smb2_read_plain_req *req = NULL;
3816 struct smb2_sync_hdr *shdr;
3817 struct TCP_Server_Info *server = io_parms->server;
3819 rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, server,
3820 (void **) &req, total_len);
3825 return -ECONNABORTED;
3827 shdr = &req->sync_hdr;
3828 shdr->ProcessId = cpu_to_le32(io_parms->pid);
3830 req->PersistentFileId = io_parms->persistent_fid;
3831 req->VolatileFileId = io_parms->volatile_fid;
3832 req->ReadChannelInfoOffset = 0; /* reserved */
3833 req->ReadChannelInfoLength = 0; /* reserved */
3834 req->Channel = 0; /* reserved */
3835 req->MinimumCount = 0;
3836 req->Length = cpu_to_le32(io_parms->length);
3837 req->Offset = cpu_to_le64(io_parms->offset);
3839 trace_smb3_read_enter(0 /* xid */,
3840 io_parms->persistent_fid,
3841 io_parms->tcon->tid, io_parms->tcon->ses->Suid,
3842 io_parms->offset, io_parms->length);
3843 #ifdef CONFIG_CIFS_SMB_DIRECT
3845 * If we want to do a RDMA write, fill in and append
3846 * smbd_buffer_descriptor_v1 to the end of read request
3848 if (server->rdma && rdata && !server->sign &&
3849 rdata->bytes >= server->smbd_conn->rdma_readwrite_threshold) {
3851 struct smbd_buffer_descriptor_v1 *v1;
3852 bool need_invalidate = server->dialect == SMB30_PROT_ID;
3854 rdata->mr = smbd_register_mr(
3855 server->smbd_conn, rdata->pages,
3856 rdata->nr_pages, rdata->page_offset,
3857 rdata->tailsz, true, need_invalidate);
3861 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
3862 if (need_invalidate)
3863 req->Channel = SMB2_CHANNEL_RDMA_V1;
3864 req->ReadChannelInfoOffset =
3865 cpu_to_le16(offsetof(struct smb2_read_plain_req, Buffer));
3866 req->ReadChannelInfoLength =
3867 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
3868 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
3869 v1->offset = cpu_to_le64(rdata->mr->mr->iova);
3870 v1->token = cpu_to_le32(rdata->mr->mr->rkey);
3871 v1->length = cpu_to_le32(rdata->mr->mr->length);
3873 *total_len += sizeof(*v1) - 1;
3876 if (request_type & CHAINED_REQUEST) {
3877 if (!(request_type & END_OF_CHAIN)) {
3878 /* next 8-byte aligned request */
3879 *total_len = DIV_ROUND_UP(*total_len, 8) * 8;
3880 shdr->NextCommand = cpu_to_le32(*total_len);
3881 } else /* END_OF_CHAIN */
3882 shdr->NextCommand = 0;
3883 if (request_type & RELATED_REQUEST) {
3884 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
3886 * Related requests use info from previous read request
3889 shdr->SessionId = 0xFFFFFFFF;
3890 shdr->TreeId = 0xFFFFFFFF;
3891 req->PersistentFileId = 0xFFFFFFFF;
3892 req->VolatileFileId = 0xFFFFFFFF;
3895 if (remaining_bytes > io_parms->length)
3896 req->RemainingBytes = cpu_to_le32(remaining_bytes);
3898 req->RemainingBytes = 0;
3905 smb2_readv_callback(struct mid_q_entry *mid)
3907 struct cifs_readdata *rdata = mid->callback_data;
3908 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
3909 struct TCP_Server_Info *server = rdata->server;
3910 struct smb2_sync_hdr *shdr =
3911 (struct smb2_sync_hdr *)rdata->iov[0].iov_base;
3912 struct cifs_credits credits = { .value = 0, .instance = 0 };
3913 struct smb_rqst rqst = { .rq_iov = &rdata->iov[1],
3915 .rq_pages = rdata->pages,
3916 .rq_offset = rdata->page_offset,
3917 .rq_npages = rdata->nr_pages,
3918 .rq_pagesz = rdata->pagesz,
3919 .rq_tailsz = rdata->tailsz };
3921 WARN_ONCE(rdata->server != mid->server,
3922 "rdata server %p != mid server %p",
3923 rdata->server, mid->server);
3925 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
3926 __func__, mid->mid, mid->mid_state, rdata->result,
3929 switch (mid->mid_state) {
3930 case MID_RESPONSE_RECEIVED:
3931 credits.value = le16_to_cpu(shdr->CreditRequest);
3932 credits.instance = server->reconnect_instance;
3933 /* result already set, check signature */
3934 if (server->sign && !mid->decrypted) {
3937 rc = smb2_verify_signature(&rqst, server);
3939 cifs_tcon_dbg(VFS, "SMB signature verification returned error = %d\n",
3942 /* FIXME: should this be counted toward the initiating task? */
3943 task_io_account_read(rdata->got_bytes);
3944 cifs_stats_bytes_read(tcon, rdata->got_bytes);
3946 case MID_REQUEST_SUBMITTED:
3947 case MID_RETRY_NEEDED:
3948 rdata->result = -EAGAIN;
3949 if (server->sign && rdata->got_bytes)
3950 /* reset bytes number since we can not check a sign */
3951 rdata->got_bytes = 0;
3952 /* FIXME: should this be counted toward the initiating task? */
3953 task_io_account_read(rdata->got_bytes);
3954 cifs_stats_bytes_read(tcon, rdata->got_bytes);
3956 case MID_RESPONSE_MALFORMED:
3957 credits.value = le16_to_cpu(shdr->CreditRequest);
3958 credits.instance = server->reconnect_instance;
3961 rdata->result = -EIO;
3963 #ifdef CONFIG_CIFS_SMB_DIRECT
3965 * If this rdata has a memmory registered, the MR can be freed
3966 * MR needs to be freed as soon as I/O finishes to prevent deadlock
3967 * because they have limited number and are used for future I/Os
3970 smbd_deregister_mr(rdata->mr);
3974 if (rdata->result && rdata->result != -ENODATA) {
3975 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
3976 trace_smb3_read_err(0 /* xid */,
3977 rdata->cfile->fid.persistent_fid,
3978 tcon->tid, tcon->ses->Suid, rdata->offset,
3979 rdata->bytes, rdata->result);
3981 trace_smb3_read_done(0 /* xid */,
3982 rdata->cfile->fid.persistent_fid,
3983 tcon->tid, tcon->ses->Suid,
3984 rdata->offset, rdata->got_bytes);
3986 queue_work(cifsiod_wq, &rdata->work);
3987 DeleteMidQEntry(mid);
3988 add_credits(server, &credits, 0);
3991 /* smb2_async_readv - send an async read, and set up mid to handle result */
3993 smb2_async_readv(struct cifs_readdata *rdata)
3997 struct smb2_sync_hdr *shdr;
3998 struct cifs_io_parms io_parms;
3999 struct smb_rqst rqst = { .rq_iov = rdata->iov,
4001 struct TCP_Server_Info *server;
4002 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
4003 unsigned int total_len;
4005 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
4006 __func__, rdata->offset, rdata->bytes);
4009 rdata->server = cifs_pick_channel(tcon->ses);
4011 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
4012 io_parms.server = server = rdata->server;
4013 io_parms.offset = rdata->offset;
4014 io_parms.length = rdata->bytes;
4015 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
4016 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
4017 io_parms.pid = rdata->pid;
4019 rc = smb2_new_read_req(
4020 (void **) &buf, &total_len, &io_parms, rdata, 0, 0);
4024 if (smb3_encryption_required(io_parms.tcon))
4025 flags |= CIFS_TRANSFORM_REQ;
4027 rdata->iov[0].iov_base = buf;
4028 rdata->iov[0].iov_len = total_len;
4030 shdr = (struct smb2_sync_hdr *)buf;
4032 if (rdata->credits.value > 0) {
4033 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
4034 SMB2_MAX_BUFFER_SIZE));
4035 shdr->CreditRequest =
4036 cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 1);
4038 rc = adjust_credits(server, &rdata->credits, rdata->bytes);
4040 goto async_readv_out;
4042 flags |= CIFS_HAS_CREDITS;
4045 kref_get(&rdata->refcount);
4046 rc = cifs_call_async(server, &rqst,
4047 cifs_readv_receive, smb2_readv_callback,
4048 smb3_handle_read_data, rdata, flags,
4051 kref_put(&rdata->refcount, cifs_readdata_release);
4052 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
4053 trace_smb3_read_err(0 /* xid */, io_parms.persistent_fid,
4055 io_parms.tcon->ses->Suid,
4056 io_parms.offset, io_parms.length, rc);
4060 cifs_small_buf_release(buf);
4065 SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
4066 unsigned int *nbytes, char **buf, int *buf_type)
4068 struct smb_rqst rqst;
4069 int resp_buftype, rc;
4070 struct smb2_read_plain_req *req = NULL;
4071 struct smb2_read_rsp *rsp = NULL;
4073 struct kvec rsp_iov;
4074 unsigned int total_len;
4075 int flags = CIFS_LOG_ERROR;
4076 struct cifs_ses *ses = io_parms->tcon->ses;
4078 if (!io_parms->server)
4079 io_parms->server = cifs_pick_channel(io_parms->tcon->ses);
4082 rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0);
4086 if (smb3_encryption_required(io_parms->tcon))
4087 flags |= CIFS_TRANSFORM_REQ;
4089 iov[0].iov_base = (char *)req;
4090 iov[0].iov_len = total_len;
4092 memset(&rqst, 0, sizeof(struct smb_rqst));
4096 rc = cifs_send_recv(xid, ses, io_parms->server,
4097 &rqst, &resp_buftype, flags, &rsp_iov);
4098 rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
4101 if (rc != -ENODATA) {
4102 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
4103 cifs_dbg(VFS, "Send error in read = %d\n", rc);
4104 trace_smb3_read_err(xid, req->PersistentFileId,
4105 io_parms->tcon->tid, ses->Suid,
4106 io_parms->offset, io_parms->length,
4109 trace_smb3_read_done(xid, req->PersistentFileId,
4110 io_parms->tcon->tid, ses->Suid,
4111 io_parms->offset, 0);
4112 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
4113 cifs_small_buf_release(req);
4114 return rc == -ENODATA ? 0 : rc;
4116 trace_smb3_read_done(xid, req->PersistentFileId,
4117 io_parms->tcon->tid, ses->Suid,
4118 io_parms->offset, io_parms->length);
4120 cifs_small_buf_release(req);
4122 *nbytes = le32_to_cpu(rsp->DataLength);
4123 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
4124 (*nbytes > io_parms->length)) {
4125 cifs_dbg(FYI, "bad length %d for count %d\n",
4126 *nbytes, io_parms->length);
4132 memcpy(*buf, (char *)rsp + rsp->DataOffset, *nbytes);
4133 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
4134 } else if (resp_buftype != CIFS_NO_BUFFER) {
4135 *buf = rsp_iov.iov_base;
4136 if (resp_buftype == CIFS_SMALL_BUFFER)
4137 *buf_type = CIFS_SMALL_BUFFER;
4138 else if (resp_buftype == CIFS_LARGE_BUFFER)
4139 *buf_type = CIFS_LARGE_BUFFER;
4145 * Check the mid_state and signature on received buffer (if any), and queue the
4146 * workqueue completion task.
4149 smb2_writev_callback(struct mid_q_entry *mid)
4151 struct cifs_writedata *wdata = mid->callback_data;
4152 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
4153 struct TCP_Server_Info *server = wdata->server;
4154 unsigned int written;
4155 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
4156 struct cifs_credits credits = { .value = 0, .instance = 0 };
4158 WARN_ONCE(wdata->server != mid->server,
4159 "wdata server %p != mid server %p",
4160 wdata->server, mid->server);
4162 switch (mid->mid_state) {
4163 case MID_RESPONSE_RECEIVED:
4164 credits.value = le16_to_cpu(rsp->sync_hdr.CreditRequest);
4165 credits.instance = server->reconnect_instance;
4166 wdata->result = smb2_check_receive(mid, server, 0);
4167 if (wdata->result != 0)
4170 written = le32_to_cpu(rsp->DataLength);
4172 * Mask off high 16 bits when bytes written as returned
4173 * by the server is greater than bytes requested by the
4174 * client. OS/2 servers are known to set incorrect
4177 if (written > wdata->bytes)
4180 if (written < wdata->bytes)
4181 wdata->result = -ENOSPC;
4183 wdata->bytes = written;
4185 case MID_REQUEST_SUBMITTED:
4186 case MID_RETRY_NEEDED:
4187 wdata->result = -EAGAIN;
4189 case MID_RESPONSE_MALFORMED:
4190 credits.value = le16_to_cpu(rsp->sync_hdr.CreditRequest);
4191 credits.instance = server->reconnect_instance;
4194 wdata->result = -EIO;
4197 #ifdef CONFIG_CIFS_SMB_DIRECT
4199 * If this wdata has a memory registered, the MR can be freed
4200 * The number of MRs available is limited, it's important to recover
4201 * used MR as soon as I/O is finished. Hold MR longer in the later
4202 * I/O process can possibly result in I/O deadlock due to lack of MR
4203 * to send request on I/O retry
4206 smbd_deregister_mr(wdata->mr);
4210 if (wdata->result) {
4211 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
4212 trace_smb3_write_err(0 /* no xid */,
4213 wdata->cfile->fid.persistent_fid,
4214 tcon->tid, tcon->ses->Suid, wdata->offset,
4215 wdata->bytes, wdata->result);
4216 if (wdata->result == -ENOSPC)
4217 pr_warn_once("Out of space writing to %s\n",
4220 trace_smb3_write_done(0 /* no xid */,
4221 wdata->cfile->fid.persistent_fid,
4222 tcon->tid, tcon->ses->Suid,
4223 wdata->offset, wdata->bytes);
4225 queue_work(cifsiod_wq, &wdata->work);
4226 DeleteMidQEntry(mid);
4227 add_credits(server, &credits, 0);
4230 /* smb2_async_writev - send an async write, and set up mid to handle result */
4232 smb2_async_writev(struct cifs_writedata *wdata,
4233 void (*release)(struct kref *kref))
4235 int rc = -EACCES, flags = 0;
4236 struct smb2_write_req *req = NULL;
4237 struct smb2_sync_hdr *shdr;
4238 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
4239 struct TCP_Server_Info *server = wdata->server;
4241 struct smb_rqst rqst = { };
4242 unsigned int total_len;
4245 server = wdata->server = cifs_pick_channel(tcon->ses);
4247 rc = smb2_plain_req_init(SMB2_WRITE, tcon, server,
4248 (void **) &req, &total_len);
4252 if (smb3_encryption_required(tcon))
4253 flags |= CIFS_TRANSFORM_REQ;
4255 shdr = (struct smb2_sync_hdr *)req;
4256 shdr->ProcessId = cpu_to_le32(wdata->cfile->pid);
4258 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
4259 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
4260 req->WriteChannelInfoOffset = 0;
4261 req->WriteChannelInfoLength = 0;
4263 req->Offset = cpu_to_le64(wdata->offset);
4264 req->DataOffset = cpu_to_le16(
4265 offsetof(struct smb2_write_req, Buffer));
4266 req->RemainingBytes = 0;
4268 trace_smb3_write_enter(0 /* xid */, wdata->cfile->fid.persistent_fid,
4269 tcon->tid, tcon->ses->Suid, wdata->offset, wdata->bytes);
4270 #ifdef CONFIG_CIFS_SMB_DIRECT
4272 * If we want to do a server RDMA read, fill in and append
4273 * smbd_buffer_descriptor_v1 to the end of write request
4275 if (server->rdma && !server->sign && wdata->bytes >=
4276 server->smbd_conn->rdma_readwrite_threshold) {
4278 struct smbd_buffer_descriptor_v1 *v1;
4279 bool need_invalidate = server->dialect == SMB30_PROT_ID;
4281 wdata->mr = smbd_register_mr(
4282 server->smbd_conn, wdata->pages,
4283 wdata->nr_pages, wdata->page_offset,
4284 wdata->tailsz, false, need_invalidate);
4287 goto async_writev_out;
4290 req->DataOffset = 0;
4291 if (wdata->nr_pages > 1)
4292 req->RemainingBytes =
4294 (wdata->nr_pages - 1) * wdata->pagesz -
4295 wdata->page_offset + wdata->tailsz
4298 req->RemainingBytes = cpu_to_le32(wdata->tailsz);
4299 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
4300 if (need_invalidate)
4301 req->Channel = SMB2_CHANNEL_RDMA_V1;
4302 req->WriteChannelInfoOffset =
4303 cpu_to_le16(offsetof(struct smb2_write_req, Buffer));
4304 req->WriteChannelInfoLength =
4305 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
4306 v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
4307 v1->offset = cpu_to_le64(wdata->mr->mr->iova);
4308 v1->token = cpu_to_le32(wdata->mr->mr->rkey);
4309 v1->length = cpu_to_le32(wdata->mr->mr->length);
4312 iov[0].iov_len = total_len - 1;
4313 iov[0].iov_base = (char *)req;
4317 rqst.rq_pages = wdata->pages;
4318 rqst.rq_offset = wdata->page_offset;
4319 rqst.rq_npages = wdata->nr_pages;
4320 rqst.rq_pagesz = wdata->pagesz;
4321 rqst.rq_tailsz = wdata->tailsz;
4322 #ifdef CONFIG_CIFS_SMB_DIRECT
4324 iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1);
4328 cifs_dbg(FYI, "async write at %llu %u bytes\n",
4329 wdata->offset, wdata->bytes);
4331 #ifdef CONFIG_CIFS_SMB_DIRECT
4332 /* For RDMA read, I/O size is in RemainingBytes not in Length */
4334 req->Length = cpu_to_le32(wdata->bytes);
4336 req->Length = cpu_to_le32(wdata->bytes);
4339 if (wdata->credits.value > 0) {
4340 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
4341 SMB2_MAX_BUFFER_SIZE));
4342 shdr->CreditRequest =
4343 cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 1);
4345 rc = adjust_credits(server, &wdata->credits, wdata->bytes);
4347 goto async_writev_out;
4349 flags |= CIFS_HAS_CREDITS;
4352 kref_get(&wdata->refcount);
4353 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
4354 wdata, flags, &wdata->credits);
4357 trace_smb3_write_err(0 /* no xid */, req->PersistentFileId,
4358 tcon->tid, tcon->ses->Suid, wdata->offset,
4360 kref_put(&wdata->refcount, release);
4361 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
4365 cifs_small_buf_release(req);
4370 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
4371 * The length field from io_parms must be at least 1 and indicates a number of
4372 * elements with data to write that begins with position 1 in iov array. All
4373 * data length is specified by count.
4376 SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
4377 unsigned int *nbytes, struct kvec *iov, int n_vec)
4379 struct smb_rqst rqst;
4381 struct smb2_write_req *req = NULL;
4382 struct smb2_write_rsp *rsp = NULL;
4384 struct kvec rsp_iov;
4386 unsigned int total_len;
4387 struct TCP_Server_Info *server;
4394 if (!io_parms->server)
4395 io_parms->server = cifs_pick_channel(io_parms->tcon->ses);
4396 server = io_parms->server;
4398 return -ECONNABORTED;
4400 rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, server,
4401 (void **) &req, &total_len);
4405 if (smb3_encryption_required(io_parms->tcon))
4406 flags |= CIFS_TRANSFORM_REQ;
4408 req->sync_hdr.ProcessId = cpu_to_le32(io_parms->pid);
4410 req->PersistentFileId = io_parms->persistent_fid;
4411 req->VolatileFileId = io_parms->volatile_fid;
4412 req->WriteChannelInfoOffset = 0;
4413 req->WriteChannelInfoLength = 0;
4415 req->Length = cpu_to_le32(io_parms->length);
4416 req->Offset = cpu_to_le64(io_parms->offset);
4417 req->DataOffset = cpu_to_le16(
4418 offsetof(struct smb2_write_req, Buffer));
4419 req->RemainingBytes = 0;
4421 trace_smb3_write_enter(xid, io_parms->persistent_fid,
4422 io_parms->tcon->tid, io_parms->tcon->ses->Suid,
4423 io_parms->offset, io_parms->length);
4425 iov[0].iov_base = (char *)req;
4427 iov[0].iov_len = total_len - 1;
4429 memset(&rqst, 0, sizeof(struct smb_rqst));
4431 rqst.rq_nvec = n_vec + 1;
4433 rc = cifs_send_recv(xid, io_parms->tcon->ses, server,
4435 &resp_buftype, flags, &rsp_iov);
4436 rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
4439 trace_smb3_write_err(xid, req->PersistentFileId,
4440 io_parms->tcon->tid,
4441 io_parms->tcon->ses->Suid,
4442 io_parms->offset, io_parms->length, rc);
4443 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
4444 cifs_dbg(VFS, "Send error in write = %d\n", rc);
4446 *nbytes = le32_to_cpu(rsp->DataLength);
4447 trace_smb3_write_done(xid, req->PersistentFileId,
4448 io_parms->tcon->tid,
4449 io_parms->tcon->ses->Suid,
4450 io_parms->offset, *nbytes);
4453 cifs_small_buf_release(req);
4454 free_rsp_buf(resp_buftype, rsp);
4458 int posix_info_sid_size(const void *beg, const void *end)
4466 subauth = *(u8 *)(beg+1);
4467 if (subauth < 1 || subauth > 15)
4470 total = 1 + 1 + 6 + 4*subauth;
4471 if (beg + total > end)
4477 int posix_info_parse(const void *beg, const void *end,
4478 struct smb2_posix_info_parsed *out)
4484 const void *owner_sid;
4485 const void *group_sid;
4488 /* if no end bound given, assume payload to be correct */
4490 const struct smb2_posix_info *p = beg;
4492 end = beg + le32_to_cpu(p->NextEntryOffset);
4493 /* last element will have a 0 offset, pick a sensible bound */
4498 /* check base buf */
4499 if (beg + sizeof(struct smb2_posix_info) > end)
4501 total_len = sizeof(struct smb2_posix_info);
4503 /* check owner sid */
4504 owner_sid = beg + total_len;
4505 sid_len = posix_info_sid_size(owner_sid, end);
4508 total_len += sid_len;
4510 /* check group sid */
4511 group_sid = beg + total_len;
4512 sid_len = posix_info_sid_size(group_sid, end);
4515 total_len += sid_len;
4517 /* check name len */
4518 if (beg + total_len + 4 > end)
4520 name_len = le32_to_cpu(*(__le32 *)(beg + total_len));
4521 if (name_len < 1 || name_len > 0xFFFF)
4526 name = beg + total_len;
4527 if (name + name_len > end)
4529 total_len += name_len;
4533 out->size = total_len;
4534 out->name_len = name_len;
4536 memcpy(&out->owner, owner_sid,
4537 posix_info_sid_size(owner_sid, end));
4538 memcpy(&out->group, group_sid,
4539 posix_info_sid_size(group_sid, end));
4544 static int posix_info_extra_size(const void *beg, const void *end)
4546 int len = posix_info_parse(beg, end, NULL);
4550 return len - sizeof(struct smb2_posix_info);
4554 num_entries(int infotype, char *bufstart, char *end_of_buf, char **lastentry,
4558 unsigned int entrycount = 0;
4559 unsigned int next_offset = 0;
4561 FILE_DIRECTORY_INFO *dir_info;
4563 if (bufstart == NULL)
4566 entryptr = bufstart;
4569 if (entryptr + next_offset < entryptr ||
4570 entryptr + next_offset > end_of_buf ||
4571 entryptr + next_offset + size > end_of_buf) {
4572 cifs_dbg(VFS, "malformed search entry would overflow\n");
4576 entryptr = entryptr + next_offset;
4577 dir_info = (FILE_DIRECTORY_INFO *)entryptr;
4579 if (infotype == SMB_FIND_FILE_POSIX_INFO)
4580 len = posix_info_extra_size(entryptr, end_of_buf);
4582 len = le32_to_cpu(dir_info->FileNameLength);
4585 entryptr + len < entryptr ||
4586 entryptr + len > end_of_buf ||
4587 entryptr + len + size > end_of_buf) {
4588 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
4593 *lastentry = entryptr;
4596 next_offset = le32_to_cpu(dir_info->NextEntryOffset);
4607 int SMB2_query_directory_init(const unsigned int xid,
4608 struct cifs_tcon *tcon,
4609 struct TCP_Server_Info *server,
4610 struct smb_rqst *rqst,
4611 u64 persistent_fid, u64 volatile_fid,
4612 int index, int info_level)
4614 struct smb2_query_directory_req *req;
4615 unsigned char *bufptr;
4616 __le16 asteriks = cpu_to_le16('*');
4617 unsigned int output_size = CIFSMaxBufSize -
4618 MAX_SMB2_CREATE_RESPONSE_SIZE -
4619 MAX_SMB2_CLOSE_RESPONSE_SIZE;
4620 unsigned int total_len;
4621 struct kvec *iov = rqst->rq_iov;
4624 rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, server,
4625 (void **) &req, &total_len);
4629 switch (info_level) {
4630 case SMB_FIND_FILE_DIRECTORY_INFO:
4631 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
4633 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
4634 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
4636 case SMB_FIND_FILE_POSIX_INFO:
4637 req->FileInformationClass = SMB_FIND_FILE_POSIX_INFO;
4640 cifs_tcon_dbg(VFS, "info level %u isn't supported\n",
4645 req->FileIndex = cpu_to_le32(index);
4646 req->PersistentFileId = persistent_fid;
4647 req->VolatileFileId = volatile_fid;
4650 bufptr = req->Buffer;
4651 memcpy(bufptr, &asteriks, len);
4653 req->FileNameOffset =
4654 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1);
4655 req->FileNameLength = cpu_to_le16(len);
4657 * BB could be 30 bytes or so longer if we used SMB2 specific
4658 * buffer lengths, but this is safe and close enough.
4660 output_size = min_t(unsigned int, output_size, server->maxBuf);
4661 output_size = min_t(unsigned int, output_size, 2 << 15);
4662 req->OutputBufferLength = cpu_to_le32(output_size);
4664 iov[0].iov_base = (char *)req;
4666 iov[0].iov_len = total_len - 1;
4668 iov[1].iov_base = (char *)(req->Buffer);
4669 iov[1].iov_len = len;
4671 trace_smb3_query_dir_enter(xid, persistent_fid, tcon->tid,
4672 tcon->ses->Suid, index, output_size);
4677 void SMB2_query_directory_free(struct smb_rqst *rqst)
4679 if (rqst && rqst->rq_iov) {
4680 cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
4685 smb2_parse_query_directory(struct cifs_tcon *tcon,
4686 struct kvec *rsp_iov,
4688 struct cifs_search_info *srch_inf)
4690 struct smb2_query_directory_rsp *rsp;
4691 size_t info_buf_size;
4695 rsp = (struct smb2_query_directory_rsp *)rsp_iov->iov_base;
4697 switch (srch_inf->info_level) {
4698 case SMB_FIND_FILE_DIRECTORY_INFO:
4699 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
4701 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
4702 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
4704 case SMB_FIND_FILE_POSIX_INFO:
4705 /* note that posix payload are variable size */
4706 info_buf_size = sizeof(struct smb2_posix_info);
4709 cifs_tcon_dbg(VFS, "info level %u isn't supported\n",
4710 srch_inf->info_level);
4714 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
4715 le32_to_cpu(rsp->OutputBufferLength), rsp_iov,
4718 cifs_tcon_dbg(VFS, "bad info payload");
4722 srch_inf->unicode = true;
4724 if (srch_inf->ntwrk_buf_start) {
4725 if (srch_inf->smallBuf)
4726 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
4728 cifs_buf_release(srch_inf->ntwrk_buf_start);
4730 srch_inf->ntwrk_buf_start = (char *)rsp;
4731 srch_inf->srch_entries_start = srch_inf->last_entry =
4732 (char *)rsp + le16_to_cpu(rsp->OutputBufferOffset);
4733 end_of_smb = rsp_iov->iov_len + (char *)rsp;
4735 srch_inf->entries_in_buffer = num_entries(
4736 srch_inf->info_level,
4737 srch_inf->srch_entries_start,
4739 &srch_inf->last_entry,
4742 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
4743 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
4744 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
4745 srch_inf->srch_entries_start, srch_inf->last_entry);
4746 if (resp_buftype == CIFS_LARGE_BUFFER)
4747 srch_inf->smallBuf = false;
4748 else if (resp_buftype == CIFS_SMALL_BUFFER)
4749 srch_inf->smallBuf = true;
4751 cifs_tcon_dbg(VFS, "Invalid search buffer type\n");
4757 SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
4758 u64 persistent_fid, u64 volatile_fid, int index,
4759 struct cifs_search_info *srch_inf)
4761 struct smb_rqst rqst;
4762 struct kvec iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
4763 struct smb2_query_directory_rsp *rsp = NULL;
4764 int resp_buftype = CIFS_NO_BUFFER;
4765 struct kvec rsp_iov;
4767 struct cifs_ses *ses = tcon->ses;
4768 struct TCP_Server_Info *server = cifs_pick_channel(ses);
4771 if (!ses || !(ses->server))
4774 if (smb3_encryption_required(tcon))
4775 flags |= CIFS_TRANSFORM_REQ;
4777 memset(&rqst, 0, sizeof(struct smb_rqst));
4778 memset(&iov, 0, sizeof(iov));
4780 rqst.rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
4782 rc = SMB2_query_directory_init(xid, tcon, server,
4783 &rqst, persistent_fid,
4784 volatile_fid, index,
4785 srch_inf->info_level);
4789 rc = cifs_send_recv(xid, ses, server,
4790 &rqst, &resp_buftype, flags, &rsp_iov);
4791 rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
4794 if (rc == -ENODATA &&
4795 rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
4796 trace_smb3_query_dir_done(xid, persistent_fid,
4797 tcon->tid, tcon->ses->Suid, index, 0);
4798 srch_inf->endOfSearch = true;
4801 trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
4802 tcon->ses->Suid, index, 0, rc);
4803 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
4808 rc = smb2_parse_query_directory(tcon, &rsp_iov, resp_buftype,
4811 trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
4812 tcon->ses->Suid, index, 0, rc);
4815 resp_buftype = CIFS_NO_BUFFER;
4817 trace_smb3_query_dir_done(xid, persistent_fid, tcon->tid,
4818 tcon->ses->Suid, index, srch_inf->entries_in_buffer);
4821 SMB2_query_directory_free(&rqst);
4822 free_rsp_buf(resp_buftype, rsp);
4827 SMB2_set_info_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
4828 struct smb_rqst *rqst,
4829 u64 persistent_fid, u64 volatile_fid, u32 pid,
4830 u8 info_class, u8 info_type, u32 additional_info,
4831 void **data, unsigned int *size)
4833 struct smb2_set_info_req *req;
4834 struct kvec *iov = rqst->rq_iov;
4835 unsigned int i, total_len;
4838 rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, server,
4839 (void **) &req, &total_len);
4843 req->sync_hdr.ProcessId = cpu_to_le32(pid);
4844 req->InfoType = info_type;
4845 req->FileInfoClass = info_class;
4846 req->PersistentFileId = persistent_fid;
4847 req->VolatileFileId = volatile_fid;
4848 req->AdditionalInformation = cpu_to_le32(additional_info);
4851 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1);
4852 req->BufferLength = cpu_to_le32(*size);
4854 memcpy(req->Buffer, *data, *size);
4857 iov[0].iov_base = (char *)req;
4859 iov[0].iov_len = total_len - 1;
4861 for (i = 1; i < rqst->rq_nvec; i++) {
4862 le32_add_cpu(&req->BufferLength, size[i]);
4863 iov[i].iov_base = (char *)data[i];
4864 iov[i].iov_len = size[i];
4871 SMB2_set_info_free(struct smb_rqst *rqst)
4873 if (rqst && rqst->rq_iov)
4874 cifs_buf_release(rqst->rq_iov[0].iov_base); /* request */
4878 send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
4879 u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
4880 u8 info_type, u32 additional_info, unsigned int num,
4881 void **data, unsigned int *size)
4883 struct smb_rqst rqst;
4884 struct smb2_set_info_rsp *rsp = NULL;
4886 struct kvec rsp_iov;
4889 struct cifs_ses *ses = tcon->ses;
4890 struct TCP_Server_Info *server = cifs_pick_channel(ses);
4893 if (!ses || !server)
4899 if (smb3_encryption_required(tcon))
4900 flags |= CIFS_TRANSFORM_REQ;
4902 iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL);
4906 memset(&rqst, 0, sizeof(struct smb_rqst));
4910 rc = SMB2_set_info_init(tcon, server,
4911 &rqst, persistent_fid, volatile_fid, pid,
4912 info_class, info_type, additional_info,
4920 rc = cifs_send_recv(xid, ses, server,
4921 &rqst, &resp_buftype, flags,
4923 SMB2_set_info_free(&rqst);
4924 rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
4927 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
4928 trace_smb3_set_info_err(xid, persistent_fid, tcon->tid,
4929 ses->Suid, info_class, (__u32)info_type, rc);
4932 free_rsp_buf(resp_buftype, rsp);
4938 SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
4939 u64 volatile_fid, u32 pid, __le64 *eof)
4941 struct smb2_file_eof_info info;
4945 info.EndOfFile = *eof;
4948 size = sizeof(struct smb2_file_eof_info);
4950 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
4951 pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE,
4952 0, 1, &data, &size);
4956 SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
4957 u64 persistent_fid, u64 volatile_fid,
4958 struct cifs_ntsd *pnntsd, int pacllen, int aclflag)
4960 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
4961 current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag,
4962 1, (void **)&pnntsd, &pacllen);
4966 SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
4967 u64 persistent_fid, u64 volatile_fid,
4968 struct smb2_file_full_ea_info *buf, int len)
4970 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
4971 current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE,
4972 0, 1, (void **)&buf, &len);
4976 SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
4977 const u64 persistent_fid, const u64 volatile_fid,
4980 struct smb_rqst rqst;
4982 struct smb2_oplock_break *req = NULL;
4983 struct cifs_ses *ses = tcon->ses;
4984 struct TCP_Server_Info *server = cifs_pick_channel(ses);
4985 int flags = CIFS_OBREAK_OP;
4986 unsigned int total_len;
4988 struct kvec rsp_iov;
4991 cifs_dbg(FYI, "SMB2_oplock_break\n");
4992 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, server,
4993 (void **) &req, &total_len);
4997 if (smb3_encryption_required(tcon))
4998 flags |= CIFS_TRANSFORM_REQ;
5000 req->VolatileFid = volatile_fid;
5001 req->PersistentFid = persistent_fid;
5002 req->OplockLevel = oplock_level;
5003 req->sync_hdr.CreditRequest = cpu_to_le16(1);
5005 flags |= CIFS_NO_RSP_BUF;
5007 iov[0].iov_base = (char *)req;
5008 iov[0].iov_len = total_len;
5010 memset(&rqst, 0, sizeof(struct smb_rqst));
5014 rc = cifs_send_recv(xid, ses, server,
5015 &rqst, &resp_buf_type, flags, &rsp_iov);
5016 cifs_small_buf_release(req);
5019 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
5020 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
5027 smb2_copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
5028 struct kstatfs *kst)
5030 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
5031 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
5032 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
5033 kst->f_bfree = kst->f_bavail =
5034 le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
5039 copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO *response_data,
5040 struct kstatfs *kst)
5042 kst->f_bsize = le32_to_cpu(response_data->BlockSize);
5043 kst->f_blocks = le64_to_cpu(response_data->TotalBlocks);
5044 kst->f_bfree = le64_to_cpu(response_data->BlocksAvail);
5045 if (response_data->UserBlocksAvail == cpu_to_le64(-1))
5046 kst->f_bavail = kst->f_bfree;
5048 kst->f_bavail = le64_to_cpu(response_data->UserBlocksAvail);
5049 if (response_data->TotalFileNodes != cpu_to_le64(-1))
5050 kst->f_files = le64_to_cpu(response_data->TotalFileNodes);
5051 if (response_data->FreeFileNodes != cpu_to_le64(-1))
5052 kst->f_ffree = le64_to_cpu(response_data->FreeFileNodes);
5058 build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon,
5059 struct TCP_Server_Info *server,
5060 int level, int outbuf_len, u64 persistent_fid,
5064 struct smb2_query_info_req *req;
5065 unsigned int total_len;
5067 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
5069 if ((tcon->ses == NULL) || server == NULL)
5072 rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, server,
5073 (void **) &req, &total_len);
5077 req->InfoType = SMB2_O_INFO_FILESYSTEM;
5078 req->FileInfoClass = level;
5079 req->PersistentFileId = persistent_fid;
5080 req->VolatileFileId = volatile_fid;
5082 req->InputBufferOffset =
5083 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1);
5084 req->OutputBufferLength = cpu_to_le32(
5085 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1);
5087 iov->iov_base = (char *)req;
5088 iov->iov_len = total_len;
5093 SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon,
5094 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
5096 struct smb_rqst rqst;
5097 struct smb2_query_info_rsp *rsp = NULL;
5099 struct kvec rsp_iov;
5102 struct cifs_ses *ses = tcon->ses;
5103 struct TCP_Server_Info *server = cifs_pick_channel(ses);
5104 FILE_SYSTEM_POSIX_INFO *info = NULL;
5107 rc = build_qfs_info_req(&iov, tcon, server,
5108 FS_POSIX_INFORMATION,
5109 sizeof(FILE_SYSTEM_POSIX_INFO),
5110 persistent_fid, volatile_fid);
5114 if (smb3_encryption_required(tcon))
5115 flags |= CIFS_TRANSFORM_REQ;
5117 memset(&rqst, 0, sizeof(struct smb_rqst));
5121 rc = cifs_send_recv(xid, ses, server,
5122 &rqst, &resp_buftype, flags, &rsp_iov);
5123 cifs_small_buf_release(iov.iov_base);
5125 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
5126 goto posix_qfsinf_exit;
5128 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
5130 info = (FILE_SYSTEM_POSIX_INFO *)(
5131 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
5132 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
5133 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
5134 sizeof(FILE_SYSTEM_POSIX_INFO));
5136 copy_posix_fs_info_to_kstatfs(info, fsdata);
5139 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
5144 SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
5145 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
5147 struct smb_rqst rqst;
5148 struct smb2_query_info_rsp *rsp = NULL;
5150 struct kvec rsp_iov;
5153 struct cifs_ses *ses = tcon->ses;
5154 struct TCP_Server_Info *server = cifs_pick_channel(ses);
5155 struct smb2_fs_full_size_info *info = NULL;
5158 rc = build_qfs_info_req(&iov, tcon, server,
5159 FS_FULL_SIZE_INFORMATION,
5160 sizeof(struct smb2_fs_full_size_info),
5161 persistent_fid, volatile_fid);
5165 if (smb3_encryption_required(tcon))
5166 flags |= CIFS_TRANSFORM_REQ;
5168 memset(&rqst, 0, sizeof(struct smb_rqst));
5172 rc = cifs_send_recv(xid, ses, server,
5173 &rqst, &resp_buftype, flags, &rsp_iov);
5174 cifs_small_buf_release(iov.iov_base);
5176 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
5179 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
5181 info = (struct smb2_fs_full_size_info *)(
5182 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
5183 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
5184 le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
5185 sizeof(struct smb2_fs_full_size_info));
5187 smb2_copy_fs_info_to_kstatfs(info, fsdata);
5190 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
5195 SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
5196 u64 persistent_fid, u64 volatile_fid, int level)
5198 struct smb_rqst rqst;
5199 struct smb2_query_info_rsp *rsp = NULL;
5201 struct kvec rsp_iov;
5203 int resp_buftype, max_len, min_len;
5204 struct cifs_ses *ses = tcon->ses;
5205 struct TCP_Server_Info *server = cifs_pick_channel(ses);
5206 unsigned int rsp_len, offset;
5209 if (level == FS_DEVICE_INFORMATION) {
5210 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
5211 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
5212 } else if (level == FS_ATTRIBUTE_INFORMATION) {
5213 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
5214 min_len = MIN_FS_ATTR_INFO_SIZE;
5215 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
5216 max_len = sizeof(struct smb3_fs_ss_info);
5217 min_len = sizeof(struct smb3_fs_ss_info);
5218 } else if (level == FS_VOLUME_INFORMATION) {
5219 max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN;
5220 min_len = sizeof(struct smb3_fs_vol_info);
5222 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
5226 rc = build_qfs_info_req(&iov, tcon, server,
5228 persistent_fid, volatile_fid);
5232 if (smb3_encryption_required(tcon))
5233 flags |= CIFS_TRANSFORM_REQ;
5235 memset(&rqst, 0, sizeof(struct smb_rqst));
5239 rc = cifs_send_recv(xid, ses, server,
5240 &rqst, &resp_buftype, flags, &rsp_iov);
5241 cifs_small_buf_release(iov.iov_base);
5243 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
5246 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
5248 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
5249 offset = le16_to_cpu(rsp->OutputBufferOffset);
5250 rc = smb2_validate_iov(offset, rsp_len, &rsp_iov, min_len);
5254 if (level == FS_ATTRIBUTE_INFORMATION)
5255 memcpy(&tcon->fsAttrInfo, offset
5256 + (char *)rsp, min_t(unsigned int,
5258 else if (level == FS_DEVICE_INFORMATION)
5259 memcpy(&tcon->fsDevInfo, offset
5260 + (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO));
5261 else if (level == FS_SECTOR_SIZE_INFORMATION) {
5262 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
5263 (offset + (char *)rsp);
5264 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
5265 tcon->perf_sector_size =
5266 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
5267 } else if (level == FS_VOLUME_INFORMATION) {
5268 struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *)
5269 (offset + (char *)rsp);
5270 tcon->vol_serial_number = vol_info->VolumeSerialNumber;
5271 tcon->vol_create_time = vol_info->VolumeCreationTime;
5275 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
5280 smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
5281 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
5282 const __u32 num_lock, struct smb2_lock_element *buf)
5284 struct smb_rqst rqst;
5286 struct smb2_lock_req *req = NULL;
5288 struct kvec rsp_iov;
5291 int flags = CIFS_NO_RSP_BUF;
5292 unsigned int total_len;
5293 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
5295 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
5297 rc = smb2_plain_req_init(SMB2_LOCK, tcon, server,
5298 (void **) &req, &total_len);
5302 if (smb3_encryption_required(tcon))
5303 flags |= CIFS_TRANSFORM_REQ;
5305 req->sync_hdr.ProcessId = cpu_to_le32(pid);
5306 req->LockCount = cpu_to_le16(num_lock);
5308 req->PersistentFileId = persist_fid;
5309 req->VolatileFileId = volatile_fid;
5311 count = num_lock * sizeof(struct smb2_lock_element);
5313 iov[0].iov_base = (char *)req;
5314 iov[0].iov_len = total_len - sizeof(struct smb2_lock_element);
5315 iov[1].iov_base = (char *)buf;
5316 iov[1].iov_len = count;
5318 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
5320 memset(&rqst, 0, sizeof(struct smb_rqst));
5324 rc = cifs_send_recv(xid, tcon->ses, server,
5325 &rqst, &resp_buf_type, flags,
5327 cifs_small_buf_release(req);
5329 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
5330 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
5331 trace_smb3_lock_err(xid, persist_fid, tcon->tid,
5332 tcon->ses->Suid, rc);
5339 SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
5340 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
5341 const __u64 length, const __u64 offset, const __u32 lock_flags,
5344 struct smb2_lock_element lock;
5346 lock.Offset = cpu_to_le64(offset);
5347 lock.Length = cpu_to_le64(length);
5348 lock.Flags = cpu_to_le32(lock_flags);
5349 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
5350 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
5352 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
5356 SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
5357 __u8 *lease_key, const __le32 lease_state)
5359 struct smb_rqst rqst;
5361 struct smb2_lease_ack *req = NULL;
5362 struct cifs_ses *ses = tcon->ses;
5363 int flags = CIFS_OBREAK_OP;
5364 unsigned int total_len;
5366 struct kvec rsp_iov;
5368 __u64 *please_key_high;
5369 __u64 *please_key_low;
5370 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
5372 cifs_dbg(FYI, "SMB2_lease_break\n");
5373 rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, server,
5374 (void **) &req, &total_len);
5378 if (smb3_encryption_required(tcon))
5379 flags |= CIFS_TRANSFORM_REQ;
5381 req->sync_hdr.CreditRequest = cpu_to_le16(1);
5382 req->StructureSize = cpu_to_le16(36);
5385 memcpy(req->LeaseKey, lease_key, 16);
5386 req->LeaseState = lease_state;
5388 flags |= CIFS_NO_RSP_BUF;
5390 iov[0].iov_base = (char *)req;
5391 iov[0].iov_len = total_len;
5393 memset(&rqst, 0, sizeof(struct smb_rqst));
5397 rc = cifs_send_recv(xid, ses, server,
5398 &rqst, &resp_buf_type, flags, &rsp_iov);
5399 cifs_small_buf_release(req);
5401 please_key_low = (__u64 *)lease_key;
5402 please_key_high = (__u64 *)(lease_key+8);
5404 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
5405 trace_smb3_lease_err(le32_to_cpu(lease_state), tcon->tid,
5406 ses->Suid, *please_key_low, *please_key_high, rc);
5407 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
5409 trace_smb3_lease_done(le32_to_cpu(lease_state), tcon->tid,
5410 ses->Suid, *please_key_low, *please_key_high);