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"
53 * The following table defines the expected "StructureSize" of SMB2 requests
54 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
56 * Note that commands are defined in smb2pdu.h in le16 but the array below is
57 * indexed by command in host byte order.
59 static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
60 /* SMB2_NEGOTIATE */ 36,
61 /* SMB2_SESSION_SETUP */ 25,
63 /* SMB2_TREE_CONNECT */ 9,
64 /* SMB2_TREE_DISCONNECT */ 4,
74 /* SMB2_QUERY_DIRECTORY */ 33,
75 /* SMB2_CHANGE_NOTIFY */ 32,
76 /* SMB2_QUERY_INFO */ 41,
77 /* SMB2_SET_INFO */ 33,
78 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
81 static int encryption_required(const struct cifs_tcon *tcon)
85 if ((tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
86 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
89 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
95 smb2_hdr_assemble(struct smb2_sync_hdr *shdr, __le16 smb2_cmd,
96 const struct cifs_tcon *tcon)
98 shdr->ProtocolId = SMB2_PROTO_NUMBER;
99 shdr->StructureSize = cpu_to_le16(64);
100 shdr->Command = smb2_cmd;
101 if (tcon && tcon->ses && tcon->ses->server) {
102 struct TCP_Server_Info *server = tcon->ses->server;
104 spin_lock(&server->req_lock);
105 /* Request up to 2 credits but don't go over the limit. */
106 if (server->credits >= server->max_credits)
107 shdr->CreditRequest = cpu_to_le16(0);
109 shdr->CreditRequest = cpu_to_le16(
110 min_t(int, server->max_credits -
111 server->credits, 2));
112 spin_unlock(&server->req_lock);
114 shdr->CreditRequest = cpu_to_le16(2);
116 shdr->ProcessId = cpu_to_le32((__u16)current->tgid);
121 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
122 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
123 if ((tcon->ses) && (tcon->ses->server) &&
124 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
125 shdr->CreditCharge = cpu_to_le16(1);
126 /* else CreditCharge MBZ */
128 shdr->TreeId = tcon->tid;
129 /* Uid is not converted */
131 shdr->SessionId = tcon->ses->Suid;
134 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
135 * to pass the path on the Open SMB prefixed by \\server\share.
136 * Not sure when we would need to do the augmented path (if ever) and
137 * setting this flag breaks the SMB2 open operation since it is
138 * illegal to send an empty path name (without \\server\share prefix)
139 * when the DFS flag is set in the SMB open header. We could
140 * consider setting the flag on all operations other than open
141 * but it is safer to net set it for now.
143 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
144 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
146 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign &&
147 !encryption_required(tcon))
148 shdr->Flags |= SMB2_FLAGS_SIGNED;
154 smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
157 struct nls_table *nls_codepage;
158 struct cifs_ses *ses;
159 struct TCP_Server_Info *server;
162 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
163 * check for tcp and smb session status done differently
164 * for those three - in the calling routine.
169 if (smb2_command == SMB2_TREE_CONNECT)
172 if (tcon->tidStatus == CifsExiting) {
174 * only tree disconnect, open, and write,
175 * (and ulogoff which does not have tcon)
176 * are allowed as we start force umount.
178 if ((smb2_command != SMB2_WRITE) &&
179 (smb2_command != SMB2_CREATE) &&
180 (smb2_command != SMB2_TREE_DISCONNECT)) {
181 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
186 if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
187 (!tcon->ses->server))
191 server = ses->server;
194 * Give demultiplex thread up to 10 seconds to reconnect, should be
195 * greater than cifs socket timeout which is 7 seconds
197 while (server->tcpStatus == CifsNeedReconnect) {
199 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
200 * here since they are implicitly done when session drops.
202 switch (smb2_command) {
204 * BB Should we keep oplock break and add flush to exceptions?
206 case SMB2_TREE_DISCONNECT:
209 case SMB2_OPLOCK_BREAK:
213 wait_event_interruptible_timeout(server->response_q,
214 (server->tcpStatus != CifsNeedReconnect), 10 * HZ);
216 /* are we still trying to reconnect? */
217 if (server->tcpStatus != CifsNeedReconnect)
221 * on "soft" mounts we wait once. Hard mounts keep
222 * retrying until process is killed or server comes
226 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
231 if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
234 nls_codepage = load_nls_default();
237 * need to prevent multiple threads trying to simultaneously reconnect
238 * the same SMB session
240 mutex_lock(&tcon->ses->session_mutex);
241 rc = cifs_negotiate_protocol(0, tcon->ses);
242 if (!rc && tcon->ses->need_reconnect)
243 rc = cifs_setup_session(0, tcon->ses, nls_codepage);
245 if (rc || !tcon->need_reconnect) {
246 mutex_unlock(&tcon->ses->session_mutex);
250 cifs_mark_open_files_invalid(tcon);
251 if (tcon->use_persistent)
252 tcon->need_reopen_files = true;
254 rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
255 mutex_unlock(&tcon->ses->session_mutex);
257 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
261 if (smb2_command != SMB2_INTERNAL_CMD)
262 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
264 atomic_inc(&tconInfoReconnectCount);
267 * Check if handle based operation so we know whether we can continue
268 * or not without returning to caller to reset file handle.
271 * BB Is flush done by server on drop of tcp session? Should we special
272 * case it and skip above?
274 switch (smb2_command) {
280 case SMB2_QUERY_DIRECTORY:
281 case SMB2_CHANGE_NOTIFY:
282 case SMB2_QUERY_INFO:
286 unload_nls(nls_codepage);
291 fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, void *buf,
292 unsigned int *total_len)
294 struct smb2_sync_pdu *spdu = (struct smb2_sync_pdu *)buf;
295 /* lookup word count ie StructureSize from table */
296 __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)];
299 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
300 * largest operations (Create)
304 smb2_hdr_assemble(&spdu->sync_hdr, smb2_command, tcon);
305 spdu->StructureSize2 = cpu_to_le16(parmsize);
307 *total_len = parmsize + sizeof(struct smb2_sync_hdr);
310 /* init request without RFC1001 length at the beginning */
312 smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
313 void **request_buf, unsigned int *total_len)
316 struct smb2_sync_hdr *shdr;
318 rc = smb2_reconnect(smb2_command, tcon);
322 /* BB eventually switch this to SMB2 specific small buf size */
323 *request_buf = cifs_small_buf_get();
324 if (*request_buf == NULL) {
325 /* BB should we add a retry in here if not a writepage? */
329 shdr = (struct smb2_sync_hdr *)(*request_buf);
331 fill_small_buf(smb2_command, tcon, shdr, total_len);
334 #ifdef CONFIG_CIFS_STATS2
335 uint16_t com_code = le16_to_cpu(smb2_command);
337 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
339 cifs_stats_inc(&tcon->num_smbs_sent);
346 * Allocate and return pointer to an SMB request hdr, and set basic
347 * SMB information in the SMB header. If the return code is zero, this
348 * function must have filled in request_buf pointer. The returned buffer
349 * has RFC1001 length at the beginning.
352 small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
356 unsigned int total_len;
357 struct smb2_pdu *pdu;
359 rc = smb2_reconnect(smb2_command, tcon);
363 /* BB eventually switch this to SMB2 specific small buf size */
364 *request_buf = cifs_small_buf_get();
365 if (*request_buf == NULL) {
366 /* BB should we add a retry in here if not a writepage? */
370 pdu = (struct smb2_pdu *)(*request_buf);
372 fill_small_buf(smb2_command, tcon, get_sync_hdr(pdu), &total_len);
374 /* Note this is only network field converted to big endian */
375 pdu->hdr.smb2_buf_length = cpu_to_be32(total_len);
378 #ifdef CONFIG_CIFS_STATS2
379 uint16_t com_code = le16_to_cpu(smb2_command);
380 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
382 cifs_stats_inc(&tcon->num_smbs_sent);
388 #ifdef CONFIG_CIFS_SMB311
389 /* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
390 #define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
393 #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
394 #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
397 build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
399 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
400 pneg_ctxt->DataLength = cpu_to_le16(38);
401 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
402 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
403 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
404 pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
408 build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
410 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
411 pneg_ctxt->DataLength = cpu_to_le16(6);
412 pneg_ctxt->CipherCount = cpu_to_le16(2);
413 pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
414 pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM;
418 assemble_neg_contexts(struct smb2_negotiate_req *req)
421 /* +4 is to account for the RFC1001 len field */
422 char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT + 4;
424 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
425 /* Add 2 to size to round to 8 byte boundary */
426 pneg_ctxt += 2 + sizeof(struct smb2_preauth_neg_context);
427 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
428 req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
429 req->NegotiateContextCount = cpu_to_le16(2);
430 inc_rfc1001_len(req, 4 + sizeof(struct smb2_preauth_neg_context) + 2
431 + sizeof(struct smb2_encryption_neg_context)); /* calculate hash */
434 static void assemble_neg_contexts(struct smb2_negotiate_req *req)
442 * SMB2 Worker functions follow:
444 * The general structure of the worker functions is:
445 * 1) Call smb2_init (assembles SMB2 header)
446 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
447 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
448 * 4) Decode SMB2 command specific fields in the fixed length area
449 * 5) Decode variable length data area (if any for this SMB2 command type)
450 * 6) Call free smb buffer
456 SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
458 struct smb2_negotiate_req *req;
459 struct smb2_negotiate_rsp *rsp;
464 struct TCP_Server_Info *server = ses->server;
465 int blob_offset, blob_length;
467 int flags = CIFS_NEG_OP;
469 cifs_dbg(FYI, "Negotiate protocol\n");
472 WARN(1, "%s: server is NULL!\n", __func__);
476 rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
480 req->hdr.sync_hdr.SessionId = 0;
482 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
484 req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */
485 inc_rfc1001_len(req, 2);
487 /* only one of SMB2 signing flags may be set in SMB2 request */
489 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
490 else if (global_secflags & CIFSSEC_MAY_SIGN)
491 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
493 req->SecurityMode = 0;
495 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
497 /* ClientGUID must be zero for SMB2.02 dialect */
498 if (ses->server->vals->protocol_id == SMB20_PROT_ID)
499 memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
501 memcpy(req->ClientGUID, server->client_guid,
502 SMB2_CLIENT_GUID_SIZE);
503 if (ses->server->vals->protocol_id == SMB311_PROT_ID)
504 assemble_neg_contexts(req);
506 iov[0].iov_base = (char *)req;
507 /* 4 for rfc1002 length field */
508 iov[0].iov_len = get_rfc1002_length(req) + 4;
510 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
511 cifs_small_buf_release(req);
512 rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base;
514 * No tcon so can't do
515 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
520 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
522 /* BB we may eventually want to match the negotiated vs. requested
523 dialect, even though we are only requesting one at a time */
524 if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
525 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
526 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
527 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
528 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
529 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
530 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
531 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
532 #ifdef CONFIG_CIFS_SMB311
533 else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
534 cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
537 cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
538 le16_to_cpu(rsp->DialectRevision));
542 server->dialect = le16_to_cpu(rsp->DialectRevision);
544 /* SMB2 only has an extended negflavor */
545 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
546 /* set it to the maximum buffer size value we can send with 1 credit */
547 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
548 SMB2_MAX_BUFFER_SIZE);
549 server->max_read = le32_to_cpu(rsp->MaxReadSize);
550 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
551 /* BB Do we need to validate the SecurityMode? */
552 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
553 server->capabilities = le32_to_cpu(rsp->Capabilities);
555 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
557 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
560 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
562 * ses->sectype = RawNTLMSSP;
563 * but for time being this is our only auth choice so doesn't matter.
564 * We just found a server which sets blob length to zero expecting raw.
566 if (blob_length == 0) {
567 cifs_dbg(FYI, "missing security blob on negprot\n");
568 server->sec_ntlmssp = true;
571 rc = cifs_enable_signing(server, ses->sign);
575 rc = decode_negTokenInit(security_blob, blob_length, server);
582 free_rsp_buf(resp_buftype, rsp);
586 int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
589 struct validate_negotiate_info_req vneg_inbuf;
590 struct validate_negotiate_info_rsp *pneg_rsp;
593 cifs_dbg(FYI, "validate negotiate\n");
596 * validation ioctl must be signed, so no point sending this if we
597 * can not sign it. We could eventually change this to selectively
598 * sign just this, the first and only signed request on a connection.
599 * This is good enough for now since a user who wants better security
600 * would also enable signing on the mount. Having validation of
601 * negotiate info for signed connections helps reduce attack vectors
603 if (tcon->ses->server->sign == false)
604 return 0; /* validation requires signing */
606 vneg_inbuf.Capabilities =
607 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
608 memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid,
609 SMB2_CLIENT_GUID_SIZE);
612 vneg_inbuf.SecurityMode =
613 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
614 else if (global_secflags & CIFSSEC_MAY_SIGN)
615 vneg_inbuf.SecurityMode =
616 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
618 vneg_inbuf.SecurityMode = 0;
620 vneg_inbuf.DialectCount = cpu_to_le16(1);
621 vneg_inbuf.Dialects[0] =
622 cpu_to_le16(tcon->ses->server->vals->protocol_id);
624 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
625 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
627 (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
628 (char **)&pneg_rsp, &rsplen);
631 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
635 if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
636 cifs_dbg(VFS, "invalid size of protocol negotiate response\n");
640 /* check validate negotiate info response matches what we got earlier */
641 if (pneg_rsp->Dialect !=
642 cpu_to_le16(tcon->ses->server->vals->protocol_id))
645 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
648 /* do not validate server guid because not saved at negprot time yet */
650 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
651 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
654 /* validate negotiate successful */
655 cifs_dbg(FYI, "validate negotiate info successful\n");
659 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
664 smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
673 if (server->sec_ntlmssp &&
674 (global_secflags & CIFSSEC_MAY_NTLMSSP))
676 if ((server->sec_kerberos || server->sec_mskerberos) &&
677 (global_secflags & CIFSSEC_MAY_KRB5))
685 struct SMB2_sess_data {
687 struct cifs_ses *ses;
688 struct nls_table *nls_cp;
689 void (*func)(struct SMB2_sess_data *);
691 u64 previous_session;
693 /* we will send the SMB in three pieces:
694 * a fixed length beginning part, an optional
695 * SPNEGO blob (which can be zero length), and a
696 * last part which will include the strings
697 * and rest of bcc area. This allows us to avoid
698 * a large buffer 17K allocation
705 SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
708 struct cifs_ses *ses = sess_data->ses;
709 struct smb2_sess_setup_req *req;
710 struct TCP_Server_Info *server = ses->server;
712 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
716 /* First session, not a reauthenticate */
717 req->hdr.sync_hdr.SessionId = 0;
719 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
720 req->PreviousSessionId = sess_data->previous_session;
722 req->Flags = 0; /* MBZ */
723 /* to enable echos and oplocks */
724 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(3);
726 /* only one of SMB2 signing flags may be set in SMB2 request */
728 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
729 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
730 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
732 req->SecurityMode = 0;
734 req->Capabilities = 0;
735 req->Channel = 0; /* MBZ */
737 sess_data->iov[0].iov_base = (char *)req;
738 /* 4 for rfc1002 length field and 1 for pad */
739 sess_data->iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
741 * This variable will be used to clear the buffer
742 * allocated above in case of any error in the calling function.
744 sess_data->buf0_type = CIFS_SMALL_BUFFER;
750 SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
752 free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
753 sess_data->buf0_type = CIFS_NO_BUFFER;
757 SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
760 struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
761 struct kvec rsp_iov = { NULL, 0 };
763 /* Testing shows that buffer offset must be at location of Buffer[0] */
764 req->SecurityBufferOffset =
765 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
766 1 /* pad */ - 4 /* rfc1001 len */);
767 req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
769 inc_rfc1001_len(req, sess_data->iov[1].iov_len - 1 /* pad */);
771 /* BB add code to build os and lm fields */
773 rc = SendReceive2(sess_data->xid, sess_data->ses,
775 &sess_data->buf0_type,
776 CIFS_LOG_ERROR | CIFS_NEG_OP, &rsp_iov);
777 cifs_small_buf_release(sess_data->iov[0].iov_base);
778 memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
784 SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
787 struct cifs_ses *ses = sess_data->ses;
789 mutex_lock(&ses->server->srv_mutex);
790 if (ses->server->ops->generate_signingkey) {
791 rc = ses->server->ops->generate_signingkey(ses);
794 "SMB3 session key generation failed\n");
795 mutex_unlock(&ses->server->srv_mutex);
799 if (!ses->server->session_estab) {
800 ses->server->sequence_number = 0x2;
801 ses->server->session_estab = true;
803 mutex_unlock(&ses->server->srv_mutex);
805 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
806 spin_lock(&GlobalMid_Lock);
807 ses->status = CifsGood;
808 ses->need_reconnect = false;
809 spin_unlock(&GlobalMid_Lock);
813 #ifdef CONFIG_CIFS_UPCALL
815 SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
818 struct cifs_ses *ses = sess_data->ses;
819 struct cifs_spnego_msg *msg;
820 struct key *spnego_key = NULL;
821 struct smb2_sess_setup_rsp *rsp = NULL;
823 rc = SMB2_sess_alloc_buffer(sess_data);
827 spnego_key = cifs_get_spnego_key(ses);
828 if (IS_ERR(spnego_key)) {
829 rc = PTR_ERR(spnego_key);
834 msg = spnego_key->payload.data[0];
836 * check version field to make sure that cifs.upcall is
837 * sending us a response in an expected form
839 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
841 "bad cifs.upcall version. Expected %d got %d",
842 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
844 goto out_put_spnego_key;
847 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
849 if (!ses->auth_key.response) {
851 "Kerberos can't allocate (%u bytes) memory",
854 goto out_put_spnego_key;
856 ses->auth_key.len = msg->sesskey_len;
858 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
859 sess_data->iov[1].iov_len = msg->secblob_len;
861 rc = SMB2_sess_sendreceive(sess_data);
863 goto out_put_spnego_key;
865 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
866 ses->Suid = rsp->hdr.sync_hdr.SessionId;
868 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
870 rc = SMB2_sess_establish_session(sess_data);
872 key_invalidate(spnego_key);
875 sess_data->result = rc;
876 sess_data->func = NULL;
877 SMB2_sess_free_buffer(sess_data);
881 SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
883 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
884 sess_data->result = -EOPNOTSUPP;
885 sess_data->func = NULL;
890 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
893 SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
896 struct cifs_ses *ses = sess_data->ses;
897 struct smb2_sess_setup_rsp *rsp = NULL;
898 char *ntlmssp_blob = NULL;
899 bool use_spnego = false; /* else use raw ntlmssp */
903 * If memory allocation is successful, caller of this function
906 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
911 ses->ntlmssp->sesskey_per_smbsess = true;
913 rc = SMB2_sess_alloc_buffer(sess_data);
917 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
919 if (ntlmssp_blob == NULL) {
924 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
926 /* BB eventually need to add this */
927 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
931 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
932 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
934 sess_data->iov[1].iov_base = ntlmssp_blob;
935 sess_data->iov[1].iov_len = blob_length;
937 rc = SMB2_sess_sendreceive(sess_data);
938 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
940 /* If true, rc here is expected and not an error */
941 if (sess_data->buf0_type != CIFS_NO_BUFFER &&
942 rsp->hdr.sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
948 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
949 le16_to_cpu(rsp->SecurityBufferOffset)) {
950 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
951 le16_to_cpu(rsp->SecurityBufferOffset));
955 rc = decode_ntlmssp_challenge(rsp->Buffer,
956 le16_to_cpu(rsp->SecurityBufferLength), ses);
960 cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
963 ses->Suid = rsp->hdr.sync_hdr.SessionId;
964 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
968 SMB2_sess_free_buffer(sess_data);
970 sess_data->result = 0;
971 sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
977 sess_data->result = rc;
978 sess_data->func = NULL;
982 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
985 struct cifs_ses *ses = sess_data->ses;
986 struct smb2_sess_setup_req *req;
987 struct smb2_sess_setup_rsp *rsp = NULL;
988 unsigned char *ntlmssp_blob = NULL;
989 bool use_spnego = false; /* else use raw ntlmssp */
992 rc = SMB2_sess_alloc_buffer(sess_data);
996 req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
997 req->hdr.sync_hdr.SessionId = ses->Suid;
999 rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
1002 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
1007 /* BB eventually need to add this */
1008 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
1012 sess_data->iov[1].iov_base = ntlmssp_blob;
1013 sess_data->iov[1].iov_len = blob_length;
1015 rc = SMB2_sess_sendreceive(sess_data);
1019 rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
1021 ses->Suid = rsp->hdr.sync_hdr.SessionId;
1022 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
1024 rc = SMB2_sess_establish_session(sess_data);
1026 kfree(ntlmssp_blob);
1027 SMB2_sess_free_buffer(sess_data);
1028 kfree(ses->ntlmssp);
1029 ses->ntlmssp = NULL;
1030 sess_data->result = rc;
1031 sess_data->func = NULL;
1035 SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data)
1039 type = smb2_select_sectype(ses->server, ses->sectype);
1040 cifs_dbg(FYI, "sess setup type %d\n", type);
1041 if (type == Unspecified) {
1043 "Unable to select appropriate authentication method!");
1049 sess_data->func = SMB2_auth_kerberos;
1052 sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
1055 cifs_dbg(VFS, "secType %d not supported!\n", type);
1063 SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
1064 const struct nls_table *nls_cp)
1067 struct TCP_Server_Info *server = ses->server;
1068 struct SMB2_sess_data *sess_data;
1070 cifs_dbg(FYI, "Session Setup\n");
1073 WARN(1, "%s: server is NULL!\n", __func__);
1077 sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
1081 rc = SMB2_select_sec(ses, sess_data);
1084 sess_data->xid = xid;
1085 sess_data->ses = ses;
1086 sess_data->buf0_type = CIFS_NO_BUFFER;
1087 sess_data->nls_cp = (struct nls_table *) nls_cp;
1089 while (sess_data->func)
1090 sess_data->func(sess_data);
1092 rc = sess_data->result;
1099 SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
1101 struct smb2_logoff_req *req; /* response is also trivial struct */
1103 struct TCP_Server_Info *server;
1106 cifs_dbg(FYI, "disconnect session %p\n", ses);
1108 if (ses && (ses->server))
1109 server = ses->server;
1113 /* no need to send SMB logoff if uid already closed due to reconnect */
1114 if (ses->need_reconnect)
1115 goto smb2_session_already_dead;
1117 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
1121 /* since no tcon, smb2_init can not do this, so do here */
1122 req->hdr.sync_hdr.SessionId = ses->Suid;
1124 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
1125 flags |= CIFS_TRANSFORM_REQ;
1126 else if (server->sign)
1127 req->hdr.sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1129 rc = SendReceiveNoRsp(xid, ses, (char *) req, flags);
1130 cifs_small_buf_release(req);
1132 * No tcon so can't do
1133 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1136 smb2_session_already_dead:
1140 static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
1142 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
1145 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1147 /* These are similar values to what Windows uses */
1148 static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
1150 tcon->max_chunks = 256;
1151 tcon->max_bytes_chunk = 1048576;
1152 tcon->max_bytes_copy = 16777216;
1156 SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
1157 struct cifs_tcon *tcon, const struct nls_table *cp)
1159 struct smb2_tree_connect_req *req;
1160 struct smb2_tree_connect_rsp *rsp = NULL;
1162 struct kvec rsp_iov;
1166 struct TCP_Server_Info *server;
1167 __le16 *unc_path = NULL;
1170 cifs_dbg(FYI, "TCON\n");
1172 if ((ses->server) && tree)
1173 server = ses->server;
1177 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
1178 if (unc_path == NULL)
1181 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
1183 if (unc_path_len < 2) {
1188 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
1192 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
1199 if ((ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA))
1200 flags |= CIFS_TRANSFORM_REQ;
1202 /* since no tcon, smb2_init can not do this, so do here */
1203 req->hdr.sync_hdr.SessionId = ses->Suid;
1204 if (ses->server->sign)
1205 req->hdr.sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
1206 } else if (encryption_required(tcon))
1207 flags |= CIFS_TRANSFORM_REQ;
1209 iov[0].iov_base = (char *)req;
1210 /* 4 for rfc1002 length field and 1 for pad */
1211 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1213 /* Testing shows that buffer offset must be at location of Buffer[0] */
1214 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
1215 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
1216 req->PathLength = cpu_to_le16(unc_path_len - 2);
1217 iov[1].iov_base = unc_path;
1218 iov[1].iov_len = unc_path_len;
1220 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
1222 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov);
1223 cifs_small_buf_release(req);
1224 rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
1228 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
1229 tcon->need_reconnect = true;
1231 goto tcon_error_exit;
1235 ses->ipc_tid = rsp->hdr.sync_hdr.TreeId;
1239 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
1240 cifs_dbg(FYI, "connection to disk share\n");
1241 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
1243 cifs_dbg(FYI, "connection to pipe share\n");
1244 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
1246 cifs_dbg(FYI, "connection to printer\n");
1248 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
1250 goto tcon_error_exit;
1253 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
1254 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
1255 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1256 tcon->tidStatus = CifsGood;
1257 tcon->need_reconnect = false;
1258 tcon->tid = rsp->hdr.sync_hdr.TreeId;
1259 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
1261 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
1262 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
1263 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
1266 !(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
1267 cifs_dbg(VFS, "Encryption is requested but not supported\n");
1269 init_copy_chunk_defaults(tcon);
1270 if (tcon->ses->server->ops->validate_negotiate)
1271 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
1273 free_rsp_buf(resp_buftype, rsp);
1278 if (rsp->hdr.sync_hdr.Status == STATUS_BAD_NETWORK_NAME) {
1279 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
1285 SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
1287 struct smb2_tree_disconnect_req *req; /* response is trivial */
1289 struct TCP_Server_Info *server;
1290 struct cifs_ses *ses = tcon->ses;
1293 cifs_dbg(FYI, "Tree Disconnect\n");
1295 if (ses && (ses->server))
1296 server = ses->server;
1300 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
1303 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
1307 if (encryption_required(tcon))
1308 flags |= CIFS_TRANSFORM_REQ;
1310 rc = SendReceiveNoRsp(xid, ses, (char *)req, flags);
1311 cifs_small_buf_release(req);
1313 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
1319 static struct create_durable *
1320 create_durable_buf(void)
1322 struct create_durable *buf;
1324 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1328 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1329 (struct create_durable, Data));
1330 buf->ccontext.DataLength = cpu_to_le32(16);
1331 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1332 (struct create_durable, Name));
1333 buf->ccontext.NameLength = cpu_to_le16(4);
1334 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1342 static struct create_durable *
1343 create_reconnect_durable_buf(struct cifs_fid *fid)
1345 struct create_durable *buf;
1347 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
1351 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1352 (struct create_durable, Data));
1353 buf->ccontext.DataLength = cpu_to_le32(16);
1354 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1355 (struct create_durable, Name));
1356 buf->ccontext.NameLength = cpu_to_le16(4);
1357 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
1358 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
1359 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1368 parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
1369 unsigned int *epoch)
1372 struct create_context *cc;
1374 unsigned int remaining;
1377 data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
1378 remaining = le32_to_cpu(rsp->CreateContextsLength);
1379 cc = (struct create_context *)data_offset;
1380 while (remaining >= sizeof(struct create_context)) {
1381 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
1382 if (le16_to_cpu(cc->NameLength) == 4 &&
1383 strncmp(name, "RqLs", 4) == 0)
1384 return server->ops->parse_lease_buf(cc, epoch);
1386 next = le32_to_cpu(cc->Next);
1390 cc = (struct create_context *)((char *)cc + next);
1397 add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1398 unsigned int *num_iovec, __u8 *oplock)
1400 struct smb2_create_req *req = iov[0].iov_base;
1401 unsigned int num = *num_iovec;
1403 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
1404 if (iov[num].iov_base == NULL)
1406 iov[num].iov_len = server->vals->create_lease_size;
1407 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1408 if (!req->CreateContextsOffset)
1409 req->CreateContextsOffset = cpu_to_le32(
1410 sizeof(struct smb2_create_req) - 4 +
1411 iov[num - 1].iov_len);
1412 le32_add_cpu(&req->CreateContextsLength,
1413 server->vals->create_lease_size);
1414 inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
1415 *num_iovec = num + 1;
1419 static struct create_durable_v2 *
1420 create_durable_v2_buf(struct cifs_fid *pfid)
1422 struct create_durable_v2 *buf;
1424 buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
1428 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1429 (struct create_durable_v2, dcontext));
1430 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
1431 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1432 (struct create_durable_v2, Name));
1433 buf->ccontext.NameLength = cpu_to_le16(4);
1435 buf->dcontext.Timeout = 0; /* Should this be configurable by workload */
1436 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1437 generate_random_uuid(buf->dcontext.CreateGuid);
1438 memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
1440 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1448 static struct create_durable_handle_reconnect_v2 *
1449 create_reconnect_durable_v2_buf(struct cifs_fid *fid)
1451 struct create_durable_handle_reconnect_v2 *buf;
1453 buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
1458 buf->ccontext.DataOffset =
1459 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1461 buf->ccontext.DataLength =
1462 cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
1463 buf->ccontext.NameOffset =
1464 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
1466 buf->ccontext.NameLength = cpu_to_le16(4);
1468 buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
1469 buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
1470 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
1471 memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
1473 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1482 add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
1483 struct cifs_open_parms *oparms)
1485 struct smb2_create_req *req = iov[0].iov_base;
1486 unsigned int num = *num_iovec;
1488 iov[num].iov_base = create_durable_v2_buf(oparms->fid);
1489 if (iov[num].iov_base == NULL)
1491 iov[num].iov_len = sizeof(struct create_durable_v2);
1492 if (!req->CreateContextsOffset)
1493 req->CreateContextsOffset =
1494 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1496 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
1497 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable_v2));
1498 *num_iovec = num + 1;
1503 add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
1504 struct cifs_open_parms *oparms)
1506 struct smb2_create_req *req = iov[0].iov_base;
1507 unsigned int num = *num_iovec;
1509 /* indicate that we don't need to relock the file */
1510 oparms->reconnect = false;
1512 iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
1513 if (iov[num].iov_base == NULL)
1515 iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
1516 if (!req->CreateContextsOffset)
1517 req->CreateContextsOffset =
1518 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1520 le32_add_cpu(&req->CreateContextsLength,
1521 sizeof(struct create_durable_handle_reconnect_v2));
1522 inc_rfc1001_len(&req->hdr,
1523 sizeof(struct create_durable_handle_reconnect_v2));
1524 *num_iovec = num + 1;
1529 add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1530 struct cifs_open_parms *oparms, bool use_persistent)
1532 struct smb2_create_req *req = iov[0].iov_base;
1533 unsigned int num = *num_iovec;
1535 if (use_persistent) {
1536 if (oparms->reconnect)
1537 return add_durable_reconnect_v2_context(iov, num_iovec,
1540 return add_durable_v2_context(iov, num_iovec, oparms);
1543 if (oparms->reconnect) {
1544 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1545 /* indicate that we don't need to relock the file */
1546 oparms->reconnect = false;
1548 iov[num].iov_base = create_durable_buf();
1549 if (iov[num].iov_base == NULL)
1551 iov[num].iov_len = sizeof(struct create_durable);
1552 if (!req->CreateContextsOffset)
1553 req->CreateContextsOffset =
1554 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1556 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
1557 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
1558 *num_iovec = num + 1;
1563 alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
1564 const char *treename, const __le16 *path)
1566 int treename_len, path_len;
1567 struct nls_table *cp;
1568 const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
1573 treename_len = strlen(treename);
1574 if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\'))
1580 path_len = UniStrnlen((wchar_t *)path, PATH_MAX);
1583 * make room for one path separator between the treename and
1586 *out_len = treename_len + 1 + path_len;
1589 * final path needs to be null-terminated UTF16 with a
1593 *out_size = roundup((*out_len+1)*2, 8);
1594 *out_path = kzalloc(*out_size, GFP_KERNEL);
1598 cp = load_nls_default();
1599 cifs_strtoUTF16(*out_path, treename, treename_len, cp);
1600 UniStrcat(*out_path, sep);
1601 UniStrcat(*out_path, path);
1608 SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
1609 __u8 *oplock, struct smb2_file_all_info *buf,
1610 struct smb2_err_rsp **err_buf)
1612 struct smb2_create_req *req;
1613 struct smb2_create_rsp *rsp;
1614 struct TCP_Server_Info *server;
1615 struct cifs_tcon *tcon = oparms->tcon;
1616 struct cifs_ses *ses = tcon->ses;
1618 struct kvec rsp_iov;
1621 __le16 *copy_path = NULL;
1624 unsigned int n_iov = 2;
1625 __u32 file_attributes = 0;
1626 char *dhc_buf = NULL, *lc_buf = NULL;
1629 cifs_dbg(FYI, "create/open\n");
1631 if (ses && (ses->server))
1632 server = ses->server;
1636 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
1640 if (encryption_required(tcon))
1641 flags |= CIFS_TRANSFORM_REQ;
1643 if (oparms->create_options & CREATE_OPTION_READONLY)
1644 file_attributes |= ATTR_READONLY;
1645 if (oparms->create_options & CREATE_OPTION_SPECIAL)
1646 file_attributes |= ATTR_SYSTEM;
1648 req->ImpersonationLevel = IL_IMPERSONATION;
1649 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
1650 /* File attributes ignored on open (used in create though) */
1651 req->FileAttributes = cpu_to_le32(file_attributes);
1652 req->ShareAccess = FILE_SHARE_ALL_LE;
1653 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1654 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
1656 iov[0].iov_base = (char *)req;
1657 /* 4 for rfc1002 length field */
1658 iov[0].iov_len = get_rfc1002_length(req) + 4;
1659 /* -1 since last byte is buf[0] which is sent below (path) */
1662 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
1664 /* [MS-SMB2] 2.2.13 NameOffset:
1665 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
1666 * the SMB2 header, the file name includes a prefix that will
1667 * be processed during DFS name normalization as specified in
1668 * section 3.3.5.9. Otherwise, the file name is relative to
1669 * the share that is identified by the TreeId in the SMB2
1672 if (tcon->share_flags & SHI1005_FLAGS_DFS) {
1675 req->hdr.sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
1676 rc = alloc_path_with_tree_prefix(©_path, ©_size,
1678 tcon->treeName, path);
1681 req->NameLength = cpu_to_le16(name_len * 2);
1682 uni_path_len = copy_size;
1685 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
1686 /* MUST set path len (NameLength) to 0 opening root of share */
1687 req->NameLength = cpu_to_le16(uni_path_len - 2);
1688 if (uni_path_len % 8 != 0) {
1689 copy_size = roundup(uni_path_len, 8);
1690 copy_path = kzalloc(copy_size, GFP_KERNEL);
1693 memcpy((char *)copy_path, (const char *)path,
1695 uni_path_len = copy_size;
1700 iov[1].iov_len = uni_path_len;
1701 iov[1].iov_base = path;
1702 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1703 inc_rfc1001_len(req, uni_path_len - 1);
1705 if (!server->oplocks)
1706 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1708 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
1709 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1710 req->RequestedOplockLevel = *oplock;
1712 rc = add_lease_context(server, iov, &n_iov, oplock);
1714 cifs_small_buf_release(req);
1718 lc_buf = iov[n_iov-1].iov_base;
1721 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1722 /* need to set Next field of lease context if we request it */
1723 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
1724 struct create_context *ccontext =
1725 (struct create_context *)iov[n_iov-1].iov_base;
1727 cpu_to_le32(server->vals->create_lease_size);
1730 rc = add_durable_context(iov, &n_iov, oparms,
1731 tcon->use_persistent);
1733 cifs_small_buf_release(req);
1738 dhc_buf = iov[n_iov-1].iov_base;
1741 rc = SendReceive2(xid, ses, iov, n_iov, &resp_buftype, flags, &rsp_iov);
1742 cifs_small_buf_release(req);
1743 rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
1746 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
1748 *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
1753 oparms->fid->persistent_fid = rsp->PersistentFileId;
1754 oparms->fid->volatile_fid = rsp->VolatileFileId;
1757 memcpy(buf, &rsp->CreationTime, 32);
1758 buf->AllocationSize = rsp->AllocationSize;
1759 buf->EndOfFile = rsp->EndofFile;
1760 buf->Attributes = rsp->FileAttributes;
1761 buf->NumberOfLinks = cpu_to_le32(1);
1762 buf->DeletePending = 0;
1765 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
1766 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
1768 *oplock = rsp->OplockLevel;
1773 free_rsp_buf(resp_buftype, rsp);
1778 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1781 SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1782 u64 volatile_fid, u32 opcode, bool is_fsctl, bool use_ipc,
1783 char *in_data, u32 indatalen,
1784 char **out_data, u32 *plen /* returned data len */)
1786 struct smb2_ioctl_req *req;
1787 struct smb2_ioctl_rsp *rsp;
1788 struct smb2_sync_hdr *shdr;
1789 struct TCP_Server_Info *server;
1790 struct cifs_ses *ses;
1792 struct kvec rsp_iov;
1798 cifs_dbg(FYI, "SMB2 IOCTL\n");
1800 if (out_data != NULL)
1803 /* zero out returned data len, in case of error */
1812 if (ses && (ses->server))
1813 server = ses->server;
1817 rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req);
1822 if (ses->ipc_tid == 0) {
1823 cifs_small_buf_release(req);
1827 cifs_dbg(FYI, "replacing tid 0x%x with IPC tid 0x%x\n",
1828 req->hdr.sync_hdr.TreeId, ses->ipc_tid);
1829 req->hdr.sync_hdr.TreeId = ses->ipc_tid;
1831 if (encryption_required(tcon))
1832 flags |= CIFS_TRANSFORM_REQ;
1834 req->CtlCode = cpu_to_le32(opcode);
1835 req->PersistentFileId = persistent_fid;
1836 req->VolatileFileId = volatile_fid;
1839 req->InputCount = cpu_to_le32(indatalen);
1840 /* do not set InputOffset if no input data */
1842 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4);
1843 iov[1].iov_base = in_data;
1844 iov[1].iov_len = indatalen;
1849 req->OutputOffset = 0;
1850 req->OutputCount = 0; /* MBZ */
1853 * Could increase MaxOutputResponse, but that would require more
1854 * than one credit. Windows typically sets this smaller, but for some
1855 * ioctls it may be useful to allow server to send more. No point
1856 * limiting what the server can send as long as fits in one credit
1858 req->MaxOutputResponse = cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1861 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
1865 iov[0].iov_base = (char *)req;
1868 * If no input data, the size of ioctl struct in
1869 * protocol spec still includes a 1 byte data buffer,
1870 * but if input data passed to ioctl, we do not
1871 * want to double count this, so we do not send
1872 * the dummy one byte of data in iovec[0] if sending
1873 * input data (in iovec[1]). We also must add 4 bytes
1874 * in first iovec to allow for rfc1002 length field.
1878 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1879 inc_rfc1001_len(req, indatalen - 1);
1881 iov[0].iov_len = get_rfc1002_length(req) + 4;
1884 rc = SendReceive2(xid, ses, iov, n_iov, &resp_buftype, flags, &rsp_iov);
1885 cifs_small_buf_release(req);
1886 rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
1888 if ((rc != 0) && (rc != -EINVAL)) {
1889 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1891 } else if (rc == -EINVAL) {
1892 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
1893 (opcode != FSCTL_SRV_COPYCHUNK)) {
1894 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1899 /* check if caller wants to look at return data or just return rc */
1900 if ((plen == NULL) || (out_data == NULL))
1903 *plen = le32_to_cpu(rsp->OutputCount);
1905 /* We check for obvious errors in the output buffer length and offset */
1907 goto ioctl_exit; /* server returned no data */
1908 else if (*plen > 0xFF00) {
1909 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
1915 if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
1916 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
1917 le32_to_cpu(rsp->OutputOffset));
1923 *out_data = kmalloc(*plen, GFP_KERNEL);
1924 if (*out_data == NULL) {
1929 shdr = get_sync_hdr(rsp);
1930 memcpy(*out_data, (char *)shdr + le32_to_cpu(rsp->OutputOffset), *plen);
1932 free_rsp_buf(resp_buftype, rsp);
1937 * Individual callers to ioctl worker function follow
1941 SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1942 u64 persistent_fid, u64 volatile_fid)
1945 struct compress_ioctl fsctl_input;
1946 char *ret_data = NULL;
1948 fsctl_input.CompressionState =
1949 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
1951 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1952 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
1953 false /* use_ipc */,
1954 (char *)&fsctl_input /* data input */,
1955 2 /* in data len */, &ret_data /* out data */, NULL);
1957 cifs_dbg(FYI, "set compression rc %d\n", rc);
1963 SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1964 u64 persistent_fid, u64 volatile_fid)
1966 struct smb2_close_req *req;
1967 struct smb2_close_rsp *rsp;
1968 struct TCP_Server_Info *server;
1969 struct cifs_ses *ses = tcon->ses;
1971 struct kvec rsp_iov;
1976 cifs_dbg(FYI, "Close\n");
1978 if (ses && (ses->server))
1979 server = ses->server;
1983 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1987 if (encryption_required(tcon))
1988 flags |= CIFS_TRANSFORM_REQ;
1990 req->PersistentFileId = persistent_fid;
1991 req->VolatileFileId = volatile_fid;
1993 iov[0].iov_base = (char *)req;
1994 /* 4 for rfc1002 length field */
1995 iov[0].iov_len = get_rfc1002_length(req) + 4;
1997 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
1998 cifs_small_buf_release(req);
1999 rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
2002 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
2006 /* BB FIXME - decode close response, update inode for caching */
2009 free_rsp_buf(resp_buftype, rsp);
2014 validate_buf(unsigned int offset, unsigned int buffer_length,
2015 struct smb2_hdr *hdr, unsigned int min_buf_size)
2018 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
2019 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
2020 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
2021 char *end_of_buf = begin_of_buf + buffer_length;
2024 if (buffer_length < min_buf_size) {
2025 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
2026 buffer_length, min_buf_size);
2030 /* check if beyond RFC1001 maximum length */
2031 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
2032 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
2033 buffer_length, smb_len);
2037 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
2038 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
2046 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2047 * Caller must free buffer.
2050 validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
2051 struct smb2_hdr *hdr, unsigned int minbufsize,
2055 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
2061 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
2065 memcpy(data, begin_of_buf, buffer_length);
2071 query_info(const unsigned int xid, struct cifs_tcon *tcon,
2072 u64 persistent_fid, u64 volatile_fid, u8 info_class,
2073 size_t output_len, size_t min_len, void *data)
2075 struct smb2_query_info_req *req;
2076 struct smb2_query_info_rsp *rsp = NULL;
2078 struct kvec rsp_iov;
2081 struct TCP_Server_Info *server;
2082 struct cifs_ses *ses = tcon->ses;
2085 cifs_dbg(FYI, "Query Info\n");
2087 if (ses && (ses->server))
2088 server = ses->server;
2092 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2096 if (encryption_required(tcon))
2097 flags |= CIFS_TRANSFORM_REQ;
2099 req->InfoType = SMB2_O_INFO_FILE;
2100 req->FileInfoClass = info_class;
2101 req->PersistentFileId = persistent_fid;
2102 req->VolatileFileId = volatile_fid;
2103 /* 4 for rfc1002 length field and 1 for Buffer */
2104 req->InputBufferOffset =
2105 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
2106 req->OutputBufferLength = cpu_to_le32(output_len);
2108 iov[0].iov_base = (char *)req;
2109 /* 4 for rfc1002 length field */
2110 iov[0].iov_len = get_rfc1002_length(req) + 4;
2112 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
2113 cifs_small_buf_release(req);
2114 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2117 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2121 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
2122 le32_to_cpu(rsp->OutputBufferLength),
2123 &rsp->hdr, min_len, data);
2126 free_rsp_buf(resp_buftype, rsp);
2131 SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
2132 u64 persistent_fid, u64 volatile_fid,
2133 struct smb2_file_all_info *data)
2135 return query_info(xid, tcon, persistent_fid, volatile_fid,
2136 FILE_ALL_INFORMATION,
2137 sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
2138 sizeof(struct smb2_file_all_info), data);
2142 SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
2143 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
2145 return query_info(xid, tcon, persistent_fid, volatile_fid,
2146 FILE_INTERNAL_INFORMATION,
2147 sizeof(struct smb2_file_internal_info),
2148 sizeof(struct smb2_file_internal_info), uniqueid);
2152 * This is a no-op for now. We're not really interested in the reply, but
2153 * rather in the fact that the server sent one and that server->lstrp
2156 * FIXME: maybe we should consider checking that the reply matches request?
2159 smb2_echo_callback(struct mid_q_entry *mid)
2161 struct TCP_Server_Info *server = mid->callback_data;
2162 struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
2163 unsigned int credits_received = 1;
2165 if (mid->mid_state == MID_RESPONSE_RECEIVED)
2166 credits_received = le16_to_cpu(rsp->hdr.sync_hdr.CreditRequest);
2168 mutex_lock(&server->srv_mutex);
2169 DeleteMidQEntry(mid);
2170 mutex_unlock(&server->srv_mutex);
2171 add_credits(server, credits_received, CIFS_ECHO_OP);
2174 void smb2_reconnect_server(struct work_struct *work)
2176 struct TCP_Server_Info *server = container_of(work,
2177 struct TCP_Server_Info, reconnect.work);
2178 struct cifs_ses *ses;
2179 struct cifs_tcon *tcon, *tcon2;
2180 struct list_head tmp_list;
2181 int tcon_exist = false;
2183 int resched = false;
2186 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2187 mutex_lock(&server->reconnect_mutex);
2189 INIT_LIST_HEAD(&tmp_list);
2190 cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
2192 spin_lock(&cifs_tcp_ses_lock);
2193 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2194 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2195 if (tcon->need_reconnect || tcon->need_reopen_files) {
2197 list_add_tail(&tcon->rlist, &tmp_list);
2203 * Get the reference to server struct to be sure that the last call of
2204 * cifs_put_tcon() in the loop below won't release the server pointer.
2207 server->srv_count++;
2209 spin_unlock(&cifs_tcp_ses_lock);
2211 list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
2212 rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon);
2214 cifs_reopen_persistent_handles(tcon);
2217 list_del_init(&tcon->rlist);
2218 cifs_put_tcon(tcon);
2221 cifs_dbg(FYI, "Reconnecting tcons finished\n");
2223 queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
2224 mutex_unlock(&server->reconnect_mutex);
2226 /* now we can safely release srv struct */
2228 cifs_put_tcp_session(server, 1);
2232 SMB2_echo(struct TCP_Server_Info *server)
2234 struct smb2_echo_req *req;
2237 struct smb_rqst rqst = { .rq_iov = iov,
2240 cifs_dbg(FYI, "In echo request\n");
2242 if (server->tcpStatus == CifsNeedNegotiate) {
2243 /* No need to send echo on newly established connections */
2244 queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
2248 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
2252 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
2254 /* 4 for rfc1002 length field */
2256 iov[0].iov_base = (char *)req;
2257 iov[1].iov_len = get_rfc1002_length(req);
2258 iov[1].iov_base = (char *)req + 4;
2260 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
2261 server, CIFS_ECHO_OP);
2263 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
2265 cifs_small_buf_release(req);
2270 SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2273 struct smb2_flush_req *req;
2274 struct TCP_Server_Info *server;
2275 struct cifs_ses *ses = tcon->ses;
2277 struct kvec rsp_iov;
2282 cifs_dbg(FYI, "Flush\n");
2284 if (ses && (ses->server))
2285 server = ses->server;
2289 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
2293 if (encryption_required(tcon))
2294 flags |= CIFS_TRANSFORM_REQ;
2296 req->PersistentFileId = persistent_fid;
2297 req->VolatileFileId = volatile_fid;
2299 iov[0].iov_base = (char *)req;
2300 /* 4 for rfc1002 length field */
2301 iov[0].iov_len = get_rfc1002_length(req) + 4;
2303 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov);
2304 cifs_small_buf_release(req);
2307 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
2309 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
2314 * To form a chain of read requests, any read requests after the first should
2315 * have the end_of_chain boolean set to true.
2318 smb2_new_read_req(void **buf, unsigned int *total_len,
2319 struct cifs_io_parms *io_parms, unsigned int remaining_bytes,
2323 struct smb2_read_plain_req *req = NULL;
2324 struct smb2_sync_hdr *shdr;
2326 rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
2330 if (io_parms->tcon->ses->server == NULL)
2331 return -ECONNABORTED;
2333 shdr = &req->sync_hdr;
2334 shdr->ProcessId = cpu_to_le32(io_parms->pid);
2336 req->PersistentFileId = io_parms->persistent_fid;
2337 req->VolatileFileId = io_parms->volatile_fid;
2338 req->ReadChannelInfoOffset = 0; /* reserved */
2339 req->ReadChannelInfoLength = 0; /* reserved */
2340 req->Channel = 0; /* reserved */
2341 req->MinimumCount = 0;
2342 req->Length = cpu_to_le32(io_parms->length);
2343 req->Offset = cpu_to_le64(io_parms->offset);
2345 if (request_type & CHAINED_REQUEST) {
2346 if (!(request_type & END_OF_CHAIN)) {
2347 /* next 8-byte aligned request */
2348 *total_len = DIV_ROUND_UP(*total_len, 8) * 8;
2349 shdr->NextCommand = cpu_to_le32(*total_len);
2350 } else /* END_OF_CHAIN */
2351 shdr->NextCommand = 0;
2352 if (request_type & RELATED_REQUEST) {
2353 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2355 * Related requests use info from previous read request
2358 shdr->SessionId = 0xFFFFFFFF;
2359 shdr->TreeId = 0xFFFFFFFF;
2360 req->PersistentFileId = 0xFFFFFFFF;
2361 req->VolatileFileId = 0xFFFFFFFF;
2364 if (remaining_bytes > io_parms->length)
2365 req->RemainingBytes = cpu_to_le32(remaining_bytes);
2367 req->RemainingBytes = 0;
2374 smb2_readv_callback(struct mid_q_entry *mid)
2376 struct cifs_readdata *rdata = mid->callback_data;
2377 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
2378 struct TCP_Server_Info *server = tcon->ses->server;
2379 struct smb2_sync_hdr *shdr =
2380 (struct smb2_sync_hdr *)rdata->iov[1].iov_base;
2381 unsigned int credits_received = 1;
2382 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2384 .rq_pages = rdata->pages,
2385 .rq_npages = rdata->nr_pages,
2386 .rq_pagesz = rdata->pagesz,
2387 .rq_tailsz = rdata->tailsz };
2389 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
2390 __func__, mid->mid, mid->mid_state, rdata->result,
2393 switch (mid->mid_state) {
2394 case MID_RESPONSE_RECEIVED:
2395 credits_received = le16_to_cpu(shdr->CreditRequest);
2396 /* result already set, check signature */
2397 if (server->sign && !mid->decrypted) {
2400 rc = smb2_verify_signature(&rqst, server);
2402 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
2405 /* FIXME: should this be counted toward the initiating task? */
2406 task_io_account_read(rdata->got_bytes);
2407 cifs_stats_bytes_read(tcon, rdata->got_bytes);
2409 case MID_REQUEST_SUBMITTED:
2410 case MID_RETRY_NEEDED:
2411 rdata->result = -EAGAIN;
2412 if (server->sign && rdata->got_bytes)
2413 /* reset bytes number since we can not check a sign */
2414 rdata->got_bytes = 0;
2415 /* FIXME: should this be counted toward the initiating task? */
2416 task_io_account_read(rdata->got_bytes);
2417 cifs_stats_bytes_read(tcon, rdata->got_bytes);
2420 if (rdata->result != -ENODATA)
2421 rdata->result = -EIO;
2425 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
2427 queue_work(cifsiod_wq, &rdata->work);
2428 mutex_lock(&server->srv_mutex);
2429 DeleteMidQEntry(mid);
2430 mutex_unlock(&server->srv_mutex);
2431 add_credits(server, credits_received, 0);
2434 /* smb2_async_readv - send an async read, and set up mid to handle result */
2436 smb2_async_readv(struct cifs_readdata *rdata)
2440 struct smb2_sync_hdr *shdr;
2441 struct cifs_io_parms io_parms;
2442 struct smb_rqst rqst = { .rq_iov = rdata->iov,
2444 struct TCP_Server_Info *server;
2445 unsigned int total_len;
2448 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
2449 __func__, rdata->offset, rdata->bytes);
2451 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
2452 io_parms.offset = rdata->offset;
2453 io_parms.length = rdata->bytes;
2454 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
2455 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
2456 io_parms.pid = rdata->pid;
2458 server = io_parms.tcon->ses->server;
2460 rc = smb2_new_read_req((void **) &buf, &total_len, &io_parms, 0, 0);
2462 if (rc == -EAGAIN && rdata->credits) {
2463 /* credits was reset by reconnect */
2465 /* reduce in_flight value since we won't send the req */
2466 spin_lock(&server->req_lock);
2467 server->in_flight--;
2468 spin_unlock(&server->req_lock);
2473 if (encryption_required(io_parms.tcon))
2474 flags |= CIFS_TRANSFORM_REQ;
2476 req_len = cpu_to_be32(total_len);
2478 rdata->iov[0].iov_base = &req_len;
2479 rdata->iov[0].iov_len = sizeof(__be32);
2480 rdata->iov[1].iov_base = buf;
2481 rdata->iov[1].iov_len = total_len;
2483 shdr = (struct smb2_sync_hdr *)buf;
2485 if (rdata->credits) {
2486 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
2487 SMB2_MAX_BUFFER_SIZE));
2488 shdr->CreditRequest = shdr->CreditCharge;
2489 spin_lock(&server->req_lock);
2490 server->credits += rdata->credits -
2491 le16_to_cpu(shdr->CreditCharge);
2492 spin_unlock(&server->req_lock);
2493 wake_up(&server->request_q);
2494 flags |= CIFS_HAS_CREDITS;
2497 kref_get(&rdata->refcount);
2498 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
2499 cifs_readv_receive, smb2_readv_callback,
2500 smb3_handle_read_data, rdata, flags);
2502 kref_put(&rdata->refcount, cifs_readdata_release);
2503 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
2506 cifs_small_buf_release(buf);
2511 SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
2512 unsigned int *nbytes, char **buf, int *buf_type)
2514 int resp_buftype, rc = -EACCES;
2515 struct smb2_read_plain_req *req = NULL;
2516 struct smb2_read_rsp *rsp = NULL;
2517 struct smb2_sync_hdr *shdr;
2519 struct kvec rsp_iov;
2520 unsigned int total_len;
2522 struct smb_rqst rqst = { .rq_iov = iov,
2524 int flags = CIFS_LOG_ERROR;
2525 struct cifs_ses *ses = io_parms->tcon->ses;
2528 rc = smb2_new_read_req((void **)&req, &total_len, io_parms, 0, 0);
2532 if (encryption_required(io_parms->tcon))
2533 flags |= CIFS_TRANSFORM_REQ;
2535 req_len = cpu_to_be32(total_len);
2537 iov[0].iov_base = &req_len;
2538 iov[0].iov_len = sizeof(__be32);
2539 iov[1].iov_base = req;
2540 iov[1].iov_len = total_len;
2542 rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
2543 cifs_small_buf_release(req);
2545 rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
2546 shdr = get_sync_hdr(rsp);
2548 if (shdr->Status == STATUS_END_OF_FILE) {
2549 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
2554 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
2555 cifs_dbg(VFS, "Send error in read = %d\n", rc);
2557 *nbytes = le32_to_cpu(rsp->DataLength);
2558 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
2559 (*nbytes > io_parms->length)) {
2560 cifs_dbg(FYI, "bad length %d for count %d\n",
2561 *nbytes, io_parms->length);
2568 memcpy(*buf, (char *)shdr + rsp->DataOffset, *nbytes);
2569 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
2570 } else if (resp_buftype != CIFS_NO_BUFFER) {
2571 *buf = rsp_iov.iov_base;
2572 if (resp_buftype == CIFS_SMALL_BUFFER)
2573 *buf_type = CIFS_SMALL_BUFFER;
2574 else if (resp_buftype == CIFS_LARGE_BUFFER)
2575 *buf_type = CIFS_LARGE_BUFFER;
2581 * Check the mid_state and signature on received buffer (if any), and queue the
2582 * workqueue completion task.
2585 smb2_writev_callback(struct mid_q_entry *mid)
2587 struct cifs_writedata *wdata = mid->callback_data;
2588 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
2589 struct TCP_Server_Info *server = tcon->ses->server;
2590 unsigned int written;
2591 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
2592 unsigned int credits_received = 1;
2594 switch (mid->mid_state) {
2595 case MID_RESPONSE_RECEIVED:
2596 credits_received = le16_to_cpu(rsp->hdr.sync_hdr.CreditRequest);
2597 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
2598 if (wdata->result != 0)
2601 written = le32_to_cpu(rsp->DataLength);
2603 * Mask off high 16 bits when bytes written as returned
2604 * by the server is greater than bytes requested by the
2605 * client. OS/2 servers are known to set incorrect
2608 if (written > wdata->bytes)
2611 if (written < wdata->bytes)
2612 wdata->result = -ENOSPC;
2614 wdata->bytes = written;
2616 case MID_REQUEST_SUBMITTED:
2617 case MID_RETRY_NEEDED:
2618 wdata->result = -EAGAIN;
2621 wdata->result = -EIO;
2626 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2628 queue_work(cifsiod_wq, &wdata->work);
2629 mutex_lock(&server->srv_mutex);
2630 DeleteMidQEntry(mid);
2631 mutex_unlock(&server->srv_mutex);
2632 add_credits(tcon->ses->server, credits_received, 0);
2635 /* smb2_async_writev - send an async write, and set up mid to handle result */
2637 smb2_async_writev(struct cifs_writedata *wdata,
2638 void (*release)(struct kref *kref))
2640 int rc = -EACCES, flags = 0;
2641 struct smb2_write_req *req = NULL;
2642 struct smb2_sync_hdr *shdr;
2643 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
2644 struct TCP_Server_Info *server = tcon->ses->server;
2646 struct smb_rqst rqst = { };
2648 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
2650 if (rc == -EAGAIN && wdata->credits) {
2651 /* credits was reset by reconnect */
2653 /* reduce in_flight value since we won't send the req */
2654 spin_lock(&server->req_lock);
2655 server->in_flight--;
2656 spin_unlock(&server->req_lock);
2658 goto async_writev_out;
2661 if (encryption_required(tcon))
2662 flags |= CIFS_TRANSFORM_REQ;
2664 shdr = get_sync_hdr(req);
2665 shdr->ProcessId = cpu_to_le32(wdata->cfile->pid);
2667 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
2668 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
2669 req->WriteChannelInfoOffset = 0;
2670 req->WriteChannelInfoLength = 0;
2672 req->Offset = cpu_to_le64(wdata->offset);
2673 /* 4 for rfc1002 length field */
2674 req->DataOffset = cpu_to_le16(
2675 offsetof(struct smb2_write_req, Buffer) - 4);
2676 req->RemainingBytes = 0;
2678 /* 4 for rfc1002 length field and 1 for Buffer */
2680 iov[0].iov_base = req;
2681 iov[1].iov_len = get_rfc1002_length(req) - 1;
2682 iov[1].iov_base = (char *)req + 4;
2686 rqst.rq_pages = wdata->pages;
2687 rqst.rq_npages = wdata->nr_pages;
2688 rqst.rq_pagesz = wdata->pagesz;
2689 rqst.rq_tailsz = wdata->tailsz;
2691 cifs_dbg(FYI, "async write at %llu %u bytes\n",
2692 wdata->offset, wdata->bytes);
2694 req->Length = cpu_to_le32(wdata->bytes);
2696 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
2698 if (wdata->credits) {
2699 shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
2700 SMB2_MAX_BUFFER_SIZE));
2701 shdr->CreditRequest = shdr->CreditCharge;
2702 spin_lock(&server->req_lock);
2703 server->credits += wdata->credits -
2704 le16_to_cpu(shdr->CreditCharge);
2705 spin_unlock(&server->req_lock);
2706 wake_up(&server->request_q);
2707 flags |= CIFS_HAS_CREDITS;
2710 kref_get(&wdata->refcount);
2711 rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
2715 kref_put(&wdata->refcount, release);
2716 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
2720 cifs_small_buf_release(req);
2725 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
2726 * The length field from io_parms must be at least 1 and indicates a number of
2727 * elements with data to write that begins with position 1 in iov array. All
2728 * data length is specified by count.
2731 SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
2732 unsigned int *nbytes, struct kvec *iov, int n_vec)
2735 struct smb2_write_req *req = NULL;
2736 struct smb2_write_rsp *rsp = NULL;
2738 struct kvec rsp_iov;
2746 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
2750 if (io_parms->tcon->ses->server == NULL)
2751 return -ECONNABORTED;
2753 if (encryption_required(io_parms->tcon))
2754 flags |= CIFS_TRANSFORM_REQ;
2756 req->hdr.sync_hdr.ProcessId = cpu_to_le32(io_parms->pid);
2758 req->PersistentFileId = io_parms->persistent_fid;
2759 req->VolatileFileId = io_parms->volatile_fid;
2760 req->WriteChannelInfoOffset = 0;
2761 req->WriteChannelInfoLength = 0;
2763 req->Length = cpu_to_le32(io_parms->length);
2764 req->Offset = cpu_to_le64(io_parms->offset);
2765 /* 4 for rfc1002 length field */
2766 req->DataOffset = cpu_to_le16(
2767 offsetof(struct smb2_write_req, Buffer) - 4);
2768 req->RemainingBytes = 0;
2770 iov[0].iov_base = (char *)req;
2771 /* 4 for rfc1002 length field and 1 for Buffer */
2772 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2774 /* length of entire message including data to be written */
2775 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
2777 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
2778 &resp_buftype, flags, &rsp_iov);
2779 cifs_small_buf_release(req);
2780 rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
2783 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
2784 cifs_dbg(VFS, "Send error in write = %d\n", rc);
2786 *nbytes = le32_to_cpu(rsp->DataLength);
2788 free_rsp_buf(resp_buftype, rsp);
2793 num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
2796 unsigned int entrycount = 0;
2797 unsigned int next_offset = 0;
2798 FILE_DIRECTORY_INFO *entryptr;
2800 if (bufstart == NULL)
2803 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
2806 entryptr = (FILE_DIRECTORY_INFO *)
2807 ((char *)entryptr + next_offset);
2809 if ((char *)entryptr + size > end_of_buf) {
2810 cifs_dbg(VFS, "malformed search entry would overflow\n");
2814 len = le32_to_cpu(entryptr->FileNameLength);
2815 if ((char *)entryptr + len + size > end_of_buf) {
2816 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
2821 *lastentry = (char *)entryptr;
2824 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
2836 SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
2837 u64 persistent_fid, u64 volatile_fid, int index,
2838 struct cifs_search_info *srch_inf)
2840 struct smb2_query_directory_req *req;
2841 struct smb2_query_directory_rsp *rsp = NULL;
2843 struct kvec rsp_iov;
2846 int resp_buftype = CIFS_NO_BUFFER;
2847 unsigned char *bufptr;
2848 struct TCP_Server_Info *server;
2849 struct cifs_ses *ses = tcon->ses;
2850 __le16 asteriks = cpu_to_le16('*');
2852 unsigned int output_size = CIFSMaxBufSize;
2853 size_t info_buf_size;
2856 if (ses && (ses->server))
2857 server = ses->server;
2861 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
2865 if (encryption_required(tcon))
2866 flags |= CIFS_TRANSFORM_REQ;
2868 switch (srch_inf->info_level) {
2869 case SMB_FIND_FILE_DIRECTORY_INFO:
2870 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
2871 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
2873 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
2874 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
2875 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
2878 cifs_dbg(VFS, "info level %u isn't supported\n",
2879 srch_inf->info_level);
2884 req->FileIndex = cpu_to_le32(index);
2885 req->PersistentFileId = persistent_fid;
2886 req->VolatileFileId = volatile_fid;
2889 bufptr = req->Buffer;
2890 memcpy(bufptr, &asteriks, len);
2892 req->FileNameOffset =
2893 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
2894 req->FileNameLength = cpu_to_le16(len);
2896 * BB could be 30 bytes or so longer if we used SMB2 specific
2897 * buffer lengths, but this is safe and close enough.
2899 output_size = min_t(unsigned int, output_size, server->maxBuf);
2900 output_size = min_t(unsigned int, output_size, 2 << 15);
2901 req->OutputBufferLength = cpu_to_le32(output_size);
2903 iov[0].iov_base = (char *)req;
2904 /* 4 for RFC1001 length and 1 for Buffer */
2905 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2907 iov[1].iov_base = (char *)(req->Buffer);
2908 iov[1].iov_len = len;
2910 inc_rfc1001_len(req, len - 1 /* Buffer */);
2912 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov);
2913 cifs_small_buf_release(req);
2914 rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
2917 if (rc == -ENODATA &&
2918 rsp->hdr.sync_hdr.Status == STATUS_NO_MORE_FILES) {
2919 srch_inf->endOfSearch = true;
2922 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
2926 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2927 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2932 srch_inf->unicode = true;
2934 if (srch_inf->ntwrk_buf_start) {
2935 if (srch_inf->smallBuf)
2936 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
2938 cifs_buf_release(srch_inf->ntwrk_buf_start);
2940 srch_inf->ntwrk_buf_start = (char *)rsp;
2941 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
2942 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
2943 /* 4 for rfc1002 length field */
2944 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
2945 srch_inf->entries_in_buffer =
2946 num_entries(srch_inf->srch_entries_start, end_of_smb,
2947 &srch_inf->last_entry, info_buf_size);
2948 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
2949 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
2950 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
2951 srch_inf->srch_entries_start, srch_inf->last_entry);
2952 if (resp_buftype == CIFS_LARGE_BUFFER)
2953 srch_inf->smallBuf = false;
2954 else if (resp_buftype == CIFS_SMALL_BUFFER)
2955 srch_inf->smallBuf = true;
2957 cifs_dbg(VFS, "illegal search buffer type\n");
2962 free_rsp_buf(resp_buftype, rsp);
2967 send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2968 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
2969 unsigned int num, void **data, unsigned int *size)
2971 struct smb2_set_info_req *req;
2972 struct smb2_set_info_rsp *rsp = NULL;
2974 struct kvec rsp_iov;
2978 struct TCP_Server_Info *server;
2979 struct cifs_ses *ses = tcon->ses;
2982 if (ses && (ses->server))
2983 server = ses->server;
2990 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
2994 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
3000 if (encryption_required(tcon))
3001 flags |= CIFS_TRANSFORM_REQ;
3003 req->hdr.sync_hdr.ProcessId = cpu_to_le32(pid);
3005 req->InfoType = SMB2_O_INFO_FILE;
3006 req->FileInfoClass = info_class;
3007 req->PersistentFileId = persistent_fid;
3008 req->VolatileFileId = volatile_fid;
3010 /* 4 for RFC1001 length and 1 for Buffer */
3012 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
3013 req->BufferLength = cpu_to_le32(*size);
3015 inc_rfc1001_len(req, *size - 1 /* Buffer */);
3017 memcpy(req->Buffer, *data, *size);
3019 iov[0].iov_base = (char *)req;
3020 /* 4 for RFC1001 length */
3021 iov[0].iov_len = get_rfc1002_length(req) + 4;
3023 for (i = 1; i < num; i++) {
3024 inc_rfc1001_len(req, size[i]);
3025 le32_add_cpu(&req->BufferLength, size[i]);
3026 iov[i].iov_base = (char *)data[i];
3027 iov[i].iov_len = size[i];
3030 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, flags, &rsp_iov);
3031 cifs_small_buf_release(req);
3032 rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
3035 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
3037 free_rsp_buf(resp_buftype, rsp);
3043 SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
3044 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3046 struct smb2_file_rename_info info;
3048 unsigned int size[2];
3050 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3052 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
3056 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
3057 /* 0 = fail if target already exists */
3058 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3059 info.FileNameLength = cpu_to_le32(len);
3062 size[0] = sizeof(struct smb2_file_rename_info);
3064 data[1] = target_file;
3065 size[1] = len + 2 /* null */;
3067 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
3068 current->tgid, FILE_RENAME_INFORMATION, 2, data,
3075 SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
3076 u64 persistent_fid, u64 volatile_fid)
3078 __u8 delete_pending = 1;
3082 data = &delete_pending;
3083 size = 1; /* sizeof __u8 */
3085 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3086 current->tgid, FILE_DISPOSITION_INFORMATION, 1, &data,
3091 SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
3092 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
3094 struct smb2_file_link_info info;
3096 unsigned int size[2];
3098 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
3100 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
3104 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
3105 /* 0 = fail if link already exists */
3106 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
3107 info.FileNameLength = cpu_to_le32(len);
3110 size[0] = sizeof(struct smb2_file_link_info);
3112 data[1] = target_file;
3113 size[1] = len + 2 /* null */;
3115 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
3116 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
3122 SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
3123 u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc)
3125 struct smb2_file_eof_info info;
3129 info.EndOfFile = *eof;
3132 size = sizeof(struct smb2_file_eof_info);
3135 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3136 pid, FILE_ALLOCATION_INFORMATION, 1, &data, &size);
3138 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3139 pid, FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
3143 SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
3144 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
3147 size = sizeof(FILE_BASIC_INFO);
3148 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
3149 current->tgid, FILE_BASIC_INFORMATION, 1,
3150 (void **)&buf, &size);
3154 SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
3155 const u64 persistent_fid, const u64 volatile_fid,
3159 struct smb2_oplock_break *req = NULL;
3160 int flags = CIFS_OBREAK_OP;
3162 cifs_dbg(FYI, "SMB2_oplock_break\n");
3163 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
3167 if (encryption_required(tcon))
3168 flags |= CIFS_TRANSFORM_REQ;
3170 req->VolatileFid = volatile_fid;
3171 req->PersistentFid = persistent_fid;
3172 req->OplockLevel = oplock_level;
3173 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
3175 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, flags);
3176 cifs_small_buf_release(req);
3179 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
3180 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
3187 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
3188 struct kstatfs *kst)
3190 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
3191 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
3192 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
3193 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
3194 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
3199 build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
3200 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
3203 struct smb2_query_info_req *req;
3205 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
3207 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
3210 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
3214 req->InfoType = SMB2_O_INFO_FILESYSTEM;
3215 req->FileInfoClass = level;
3216 req->PersistentFileId = persistent_fid;
3217 req->VolatileFileId = volatile_fid;
3218 /* 4 for rfc1002 length field and 1 for pad */
3219 req->InputBufferOffset =
3220 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
3221 req->OutputBufferLength = cpu_to_le32(
3222 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
3224 iov->iov_base = (char *)req;
3225 /* 4 for rfc1002 length field */
3226 iov->iov_len = get_rfc1002_length(req) + 4;
3231 SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
3232 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
3234 struct smb2_query_info_rsp *rsp = NULL;
3236 struct kvec rsp_iov;
3239 struct cifs_ses *ses = tcon->ses;
3240 struct smb2_fs_full_size_info *info = NULL;
3243 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
3244 sizeof(struct smb2_fs_full_size_info),
3245 persistent_fid, volatile_fid);
3249 if (encryption_required(tcon))
3250 flags |= CIFS_TRANSFORM_REQ;
3252 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov);
3253 cifs_small_buf_release(iov.iov_base);
3255 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
3258 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
3260 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
3261 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
3262 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
3263 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
3264 sizeof(struct smb2_fs_full_size_info));
3266 copy_fs_info_to_kstatfs(info, fsdata);
3269 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
3274 SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
3275 u64 persistent_fid, u64 volatile_fid, int level)
3277 struct smb2_query_info_rsp *rsp = NULL;
3279 struct kvec rsp_iov;
3281 int resp_buftype, max_len, min_len;
3282 struct cifs_ses *ses = tcon->ses;
3283 unsigned int rsp_len, offset;
3286 if (level == FS_DEVICE_INFORMATION) {
3287 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3288 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
3289 } else if (level == FS_ATTRIBUTE_INFORMATION) {
3290 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
3291 min_len = MIN_FS_ATTR_INFO_SIZE;
3292 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
3293 max_len = sizeof(struct smb3_fs_ss_info);
3294 min_len = sizeof(struct smb3_fs_ss_info);
3296 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
3300 rc = build_qfs_info_req(&iov, tcon, level, max_len,
3301 persistent_fid, volatile_fid);
3305 if (encryption_required(tcon))
3306 flags |= CIFS_TRANSFORM_REQ;
3308 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov);
3309 cifs_small_buf_release(iov.iov_base);
3311 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
3314 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
3316 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
3317 offset = le16_to_cpu(rsp->OutputBufferOffset);
3318 rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
3322 if (level == FS_ATTRIBUTE_INFORMATION)
3323 memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
3324 + (char *)&rsp->hdr, min_t(unsigned int,
3326 else if (level == FS_DEVICE_INFORMATION)
3327 memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
3328 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
3329 else if (level == FS_SECTOR_SIZE_INFORMATION) {
3330 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
3331 (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
3332 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
3333 tcon->perf_sector_size =
3334 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
3338 free_rsp_buf(resp_buftype, rsp_iov.iov_base);
3343 smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
3344 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3345 const __u32 num_lock, struct smb2_lock_element *buf)
3348 struct smb2_lock_req *req = NULL;
3350 struct kvec rsp_iov;
3353 int flags = CIFS_NO_RESP;
3355 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
3357 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
3361 if (encryption_required(tcon))
3362 flags |= CIFS_TRANSFORM_REQ;
3364 req->hdr.sync_hdr.ProcessId = cpu_to_le32(pid);
3365 req->LockCount = cpu_to_le16(num_lock);
3367 req->PersistentFileId = persist_fid;
3368 req->VolatileFileId = volatile_fid;
3370 count = num_lock * sizeof(struct smb2_lock_element);
3371 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
3373 iov[0].iov_base = (char *)req;
3374 /* 4 for rfc1002 length field and count for all locks */
3375 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
3376 iov[1].iov_base = (char *)buf;
3377 iov[1].iov_len = count;
3379 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
3380 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, flags,
3382 cifs_small_buf_release(req);
3384 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
3385 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
3392 SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
3393 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
3394 const __u64 length, const __u64 offset, const __u32 lock_flags,
3397 struct smb2_lock_element lock;
3399 lock.Offset = cpu_to_le64(offset);
3400 lock.Length = cpu_to_le64(length);
3401 lock.Flags = cpu_to_le32(lock_flags);
3402 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
3403 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
3405 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
3409 SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
3410 __u8 *lease_key, const __le32 lease_state)
3413 struct smb2_lease_ack *req = NULL;
3414 int flags = CIFS_OBREAK_OP;
3416 cifs_dbg(FYI, "SMB2_lease_break\n");
3417 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
3421 if (encryption_required(tcon))
3422 flags |= CIFS_TRANSFORM_REQ;
3424 req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
3425 req->StructureSize = cpu_to_le16(36);
3426 inc_rfc1001_len(req, 12);
3428 memcpy(req->LeaseKey, lease_key, 16);
3429 req->LeaseState = lease_state;
3431 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, flags);
3432 cifs_small_buf_release(req);
3435 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
3436 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);