4 * Copyright (C) International Business Machines Corp., 2002,2009
5 * Author(s): Steve French (sfrench@us.ibm.com)
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include <linux/net.h>
23 #include <linux/string.h>
24 #include <linux/list.h>
25 #include <linux/wait.h>
26 #include <linux/slab.h>
27 #include <linux/pagemap.h>
28 #include <linux/ctype.h>
29 #include <linux/utsname.h>
30 #include <linux/mempool.h>
31 #include <linux/delay.h>
32 #include <linux/completion.h>
33 #include <linux/kthread.h>
34 #include <linux/pagevec.h>
35 #include <linux/freezer.h>
36 #include <linux/namei.h>
37 #include <asm/uaccess.h>
38 #include <asm/processor.h>
39 #include <linux/inet.h>
43 #include "cifsproto.h"
44 #include "cifs_unicode.h"
45 #include "cifs_debug.h"
46 #include "cifs_fs_sb.h"
49 #include "rfc1002pdu.h"
54 #define RFC1001_PORT 139
56 extern void SMBNTencrypt(unsigned char *passwd
, unsigned char *c8
,
59 extern mempool_t
*cifs_req_poolp
;
67 char *iocharset
; /* local code page for mapping to and from Unicode */
68 char source_rfc1001_name
[16]; /* netbios name of client */
69 char target_rfc1001_name
[16]; /* netbios name of server for Win9x/ME */
83 bool no_psx_acl
:1; /* set if posix acl support should be disabled */
85 bool no_xattr
:1; /* set if xattr (EA) support should be disabled*/
86 bool server_ino
:1; /* use inode numbers from server ie UniqueId */
88 bool remap
:1; /* set to remap seven reserved chars in filenames */
89 bool posix_paths
:1; /* unset to not ask for posix pathnames. */
92 bool nullauth
:1; /* attempt to authenticate with null user */
93 bool nocase
:1; /* request case insensitive filenames */
94 bool nobrl
:1; /* disable sending byte range locks to srv */
95 bool mand_lock
:1; /* send mandatory not posix byte range lock reqs */
96 bool seal
:1; /* request transport encryption on share */
97 bool nodfs
:1; /* Do not request DFS, even if available */
98 bool local_lease
:1; /* check leases only on local system, not remote */
101 bool nostrictsync
:1; /* do not force expensive SMBflush on every sync */
102 bool fsc
:1; /* enable fscache */
105 bool sockopt_tcp_nodelay
:1;
106 unsigned short int port
;
108 struct nls_table
*local_nls
;
111 static int ipv4_connect(struct TCP_Server_Info
*server
);
112 static int ipv6_connect(struct TCP_Server_Info
*server
);
115 * cifs tcp session reconnection
117 * mark tcp session as reconnecting so temporarily locked
118 * mark all smb sessions as reconnecting for tcp session
119 * reconnect tcp session
120 * wake up waiters on reconnection? - (not needed currently)
123 cifs_reconnect(struct TCP_Server_Info
*server
)
126 struct list_head
*tmp
, *tmp2
;
127 struct cifsSesInfo
*ses
;
128 struct cifsTconInfo
*tcon
;
129 struct mid_q_entry
*mid_entry
;
131 spin_lock(&GlobalMid_Lock
);
132 if (server
->tcpStatus
== CifsExiting
) {
133 /* the demux thread will exit normally
134 next time through the loop */
135 spin_unlock(&GlobalMid_Lock
);
138 server
->tcpStatus
= CifsNeedReconnect
;
139 spin_unlock(&GlobalMid_Lock
);
142 cFYI(1, "Reconnecting tcp session");
144 /* before reconnecting the tcp session, mark the smb session (uid)
145 and the tid bad so they are not used until reconnected */
146 read_lock(&cifs_tcp_ses_lock
);
147 list_for_each(tmp
, &server
->smb_ses_list
) {
148 ses
= list_entry(tmp
, struct cifsSesInfo
, smb_ses_list
);
149 ses
->need_reconnect
= true;
151 list_for_each(tmp2
, &ses
->tcon_list
) {
152 tcon
= list_entry(tmp2
, struct cifsTconInfo
, tcon_list
);
153 tcon
->need_reconnect
= true;
156 read_unlock(&cifs_tcp_ses_lock
);
157 /* do not want to be sending data on a socket we are freeing */
158 mutex_lock(&server
->srv_mutex
);
159 if (server
->ssocket
) {
160 cFYI(1, "State: 0x%x Flags: 0x%lx", server
->ssocket
->state
,
161 server
->ssocket
->flags
);
162 kernel_sock_shutdown(server
->ssocket
, SHUT_WR
);
163 cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx",
164 server
->ssocket
->state
,
165 server
->ssocket
->flags
);
166 sock_release(server
->ssocket
);
167 server
->ssocket
= NULL
;
170 spin_lock(&GlobalMid_Lock
);
171 list_for_each(tmp
, &server
->pending_mid_q
) {
172 mid_entry
= list_entry(tmp
, struct
175 if (mid_entry
->midState
== MID_REQUEST_SUBMITTED
) {
176 /* Mark other intransit requests as needing
177 retry so we do not immediately mark the
178 session bad again (ie after we reconnect
179 below) as they timeout too */
180 mid_entry
->midState
= MID_RETRY_NEEDED
;
183 spin_unlock(&GlobalMid_Lock
);
184 mutex_unlock(&server
->srv_mutex
);
186 while ((server
->tcpStatus
!= CifsExiting
) &&
187 (server
->tcpStatus
!= CifsGood
)) {
189 if (server
->addr
.sockAddr6
.sin6_family
== AF_INET6
)
190 rc
= ipv6_connect(server
);
192 rc
= ipv4_connect(server
);
194 cFYI(1, "reconnect error %d", rc
);
197 atomic_inc(&tcpSesReconnectCount
);
198 spin_lock(&GlobalMid_Lock
);
199 if (server
->tcpStatus
!= CifsExiting
)
200 server
->tcpStatus
= CifsGood
;
201 server
->sequence_number
= 0;
202 spin_unlock(&GlobalMid_Lock
);
203 /* atomic_set(&server->inFlight,0);*/
204 wake_up(&server
->response_q
);
212 0 not a transact2, or all data present
213 >0 transact2 with that much data missing
214 -EINVAL = invalid transact2
217 static int check2ndT2(struct smb_hdr
*pSMB
, unsigned int maxBufSize
)
219 struct smb_t2_rsp
*pSMBt
;
221 int data_in_this_rsp
;
224 if (pSMB
->Command
!= SMB_COM_TRANSACTION2
)
227 /* check for plausible wct, bcc and t2 data and parm sizes */
228 /* check for parm and data offset going beyond end of smb */
229 if (pSMB
->WordCount
!= 10) { /* coalesce_t2 depends on this */
230 cFYI(1, "invalid transact2 word count");
234 pSMBt
= (struct smb_t2_rsp
*)pSMB
;
236 total_data_size
= le16_to_cpu(pSMBt
->t2_rsp
.TotalDataCount
);
237 data_in_this_rsp
= le16_to_cpu(pSMBt
->t2_rsp
.DataCount
);
239 remaining
= total_data_size
- data_in_this_rsp
;
243 else if (remaining
< 0) {
244 cFYI(1, "total data %d smaller than data in frame %d",
245 total_data_size
, data_in_this_rsp
);
248 cFYI(1, "missing %d bytes from transact2, check next response",
250 if (total_data_size
> maxBufSize
) {
251 cERROR(1, "TotalDataSize %d is over maximum buffer %d",
252 total_data_size
, maxBufSize
);
259 static int coalesce_t2(struct smb_hdr
*psecond
, struct smb_hdr
*pTargetSMB
)
261 struct smb_t2_rsp
*pSMB2
= (struct smb_t2_rsp
*)psecond
;
262 struct smb_t2_rsp
*pSMBt
= (struct smb_t2_rsp
*)pTargetSMB
;
267 char *data_area_of_target
;
268 char *data_area_of_buf2
;
271 total_data_size
= le16_to_cpu(pSMBt
->t2_rsp
.TotalDataCount
);
273 if (total_data_size
!= le16_to_cpu(pSMB2
->t2_rsp
.TotalDataCount
)) {
274 cFYI(1, "total data size of primary and secondary t2 differ");
277 total_in_buf
= le16_to_cpu(pSMBt
->t2_rsp
.DataCount
);
279 remaining
= total_data_size
- total_in_buf
;
284 if (remaining
== 0) /* nothing to do, ignore */
287 total_in_buf2
= le16_to_cpu(pSMB2
->t2_rsp
.DataCount
);
288 if (remaining
< total_in_buf2
) {
289 cFYI(1, "transact2 2nd response contains too much data");
292 /* find end of first SMB data area */
293 data_area_of_target
= (char *)&pSMBt
->hdr
.Protocol
+
294 le16_to_cpu(pSMBt
->t2_rsp
.DataOffset
);
295 /* validate target area */
297 data_area_of_buf2
= (char *) &pSMB2
->hdr
.Protocol
+
298 le16_to_cpu(pSMB2
->t2_rsp
.DataOffset
);
300 data_area_of_target
+= total_in_buf
;
302 /* copy second buffer into end of first buffer */
303 memcpy(data_area_of_target
, data_area_of_buf2
, total_in_buf2
);
304 total_in_buf
+= total_in_buf2
;
305 pSMBt
->t2_rsp
.DataCount
= cpu_to_le16(total_in_buf
);
306 byte_count
= le16_to_cpu(BCC_LE(pTargetSMB
));
307 byte_count
+= total_in_buf2
;
308 BCC_LE(pTargetSMB
) = cpu_to_le16(byte_count
);
310 byte_count
= pTargetSMB
->smb_buf_length
;
311 byte_count
+= total_in_buf2
;
313 /* BB also add check that we are not beyond maximum buffer size */
315 pTargetSMB
->smb_buf_length
= byte_count
;
317 if (remaining
== total_in_buf2
) {
318 cFYI(1, "found the last secondary response");
319 return 0; /* we are done */
320 } else /* more responses to go */
326 cifs_demultiplex_thread(struct TCP_Server_Info
*server
)
329 unsigned int pdu_length
, total_read
;
330 struct smb_hdr
*smb_buffer
= NULL
;
331 struct smb_hdr
*bigbuf
= NULL
;
332 struct smb_hdr
*smallbuf
= NULL
;
333 struct msghdr smb_msg
;
335 struct socket
*csocket
= server
->ssocket
;
336 struct list_head
*tmp
;
337 struct cifsSesInfo
*ses
;
338 struct task_struct
*task_to_wake
= NULL
;
339 struct mid_q_entry
*mid_entry
;
341 bool isLargeBuf
= false;
345 current
->flags
|= PF_MEMALLOC
;
346 cFYI(1, "Demultiplex PID: %d", task_pid_nr(current
));
348 length
= atomic_inc_return(&tcpSesAllocCount
);
350 mempool_resize(cifs_req_poolp
, length
+ cifs_min_rcv
,
354 while (server
->tcpStatus
!= CifsExiting
) {
357 if (bigbuf
== NULL
) {
358 bigbuf
= cifs_buf_get();
360 cERROR(1, "No memory for large SMB response");
362 /* retry will check if exiting */
365 } else if (isLargeBuf
) {
366 /* we are reusing a dirty large buf, clear its start */
367 memset(bigbuf
, 0, sizeof(struct smb_hdr
));
370 if (smallbuf
== NULL
) {
371 smallbuf
= cifs_small_buf_get();
373 cERROR(1, "No memory for SMB response");
375 /* retry will check if exiting */
378 /* beginning of smb buffer is cleared in our buf_get */
379 } else /* if existing small buf clear beginning */
380 memset(smallbuf
, 0, sizeof(struct smb_hdr
));
384 smb_buffer
= smallbuf
;
385 iov
.iov_base
= smb_buffer
;
387 smb_msg
.msg_control
= NULL
;
388 smb_msg
.msg_controllen
= 0;
389 pdu_length
= 4; /* enough to get RFC1001 header */
392 kernel_recvmsg(csocket
, &smb_msg
,
393 &iov
, 1, pdu_length
, 0 /* BB other flags? */);
395 if (server
->tcpStatus
== CifsExiting
) {
397 } else if (server
->tcpStatus
== CifsNeedReconnect
) {
398 cFYI(1, "Reconnect after server stopped responding");
399 cifs_reconnect(server
);
400 cFYI(1, "call to reconnect done");
401 csocket
= server
->ssocket
;
403 } else if ((length
== -ERESTARTSYS
) || (length
== -EAGAIN
)) {
404 msleep(1); /* minimum sleep to prevent looping
405 allowing socket to clear and app threads to set
406 tcpStatus CifsNeedReconnect if server hung */
407 if (pdu_length
< 4) {
408 iov
.iov_base
= (4 - pdu_length
) +
410 iov
.iov_len
= pdu_length
;
411 smb_msg
.msg_control
= NULL
;
412 smb_msg
.msg_controllen
= 0;
416 } else if (length
<= 0) {
417 if (server
->tcpStatus
== CifsNew
) {
418 cFYI(1, "tcp session abend after SMBnegprot");
419 /* some servers kill the TCP session rather than
420 returning an SMB negprot error, in which
421 case reconnecting here is not going to help,
422 and so simply return error to mount */
425 if (!try_to_freeze() && (length
== -EINTR
)) {
426 cFYI(1, "cifsd thread killed");
429 cFYI(1, "Reconnect after unexpected peek error %d",
431 cifs_reconnect(server
);
432 csocket
= server
->ssocket
;
433 wake_up(&server
->response_q
);
435 } else if (length
< pdu_length
) {
436 cFYI(1, "requested %d bytes but only got %d bytes",
438 pdu_length
-= length
;
443 /* The right amount was read from socket - 4 bytes */
444 /* so we can now interpret the length field */
446 /* the first byte big endian of the length field,
447 is actually not part of the length but the type
448 with the most common, zero, as regular data */
449 temp
= *((char *) smb_buffer
);
451 /* Note that FC 1001 length is big endian on the wire,
452 but we convert it here so it is always manipulated
453 as host byte order */
454 pdu_length
= be32_to_cpu((__force __be32
)smb_buffer
->smb_buf_length
);
455 smb_buffer
->smb_buf_length
= pdu_length
;
457 cFYI(1, "rfc1002 length 0x%x", pdu_length
+4);
459 if (temp
== (char) RFC1002_SESSION_KEEP_ALIVE
) {
461 } else if (temp
== (char)RFC1002_POSITIVE_SESSION_RESPONSE
) {
462 cFYI(1, "Good RFC 1002 session rsp");
464 } else if (temp
== (char)RFC1002_NEGATIVE_SESSION_RESPONSE
) {
465 /* we get this from Windows 98 instead of
466 an error on SMB negprot response */
467 cFYI(1, "Negative RFC1002 Session Response Error 0x%x)",
469 if (server
->tcpStatus
== CifsNew
) {
470 /* if nack on negprot (rather than
471 ret of smb negprot error) reconnecting
472 not going to help, ret error to mount */
475 /* give server a second to
476 clean up before reconnect attempt */
478 /* always try 445 first on reconnect
479 since we get NACK on some if we ever
480 connected to port 139 (the NACK is
481 since we do not begin with RFC1001
482 session initialize frame) */
483 server
->addr
.sockAddr
.sin_port
=
485 cifs_reconnect(server
);
486 csocket
= server
->ssocket
;
487 wake_up(&server
->response_q
);
490 } else if (temp
!= (char) 0) {
491 cERROR(1, "Unknown RFC 1002 frame");
492 cifs_dump_mem(" Received Data: ", (char *)smb_buffer
,
494 cifs_reconnect(server
);
495 csocket
= server
->ssocket
;
499 /* else we have an SMB response */
500 if ((pdu_length
> CIFSMaxBufSize
+ MAX_CIFS_HDR_SIZE
- 4) ||
501 (pdu_length
< sizeof(struct smb_hdr
) - 1 - 4)) {
502 cERROR(1, "Invalid size SMB length %d pdu_length %d",
503 length
, pdu_length
+4);
504 cifs_reconnect(server
);
505 csocket
= server
->ssocket
;
506 wake_up(&server
->response_q
);
513 if (pdu_length
> MAX_CIFS_SMALL_BUFFER_SIZE
- 4) {
515 memcpy(bigbuf
, smallbuf
, 4);
519 iov
.iov_base
= 4 + (char *)smb_buffer
;
520 iov
.iov_len
= pdu_length
;
521 for (total_read
= 0; total_read
< pdu_length
;
522 total_read
+= length
) {
523 length
= kernel_recvmsg(csocket
, &smb_msg
, &iov
, 1,
524 pdu_length
- total_read
, 0);
525 if ((server
->tcpStatus
== CifsExiting
) ||
526 (length
== -EINTR
)) {
530 } else if (server
->tcpStatus
== CifsNeedReconnect
) {
531 cifs_reconnect(server
);
532 csocket
= server
->ssocket
;
533 /* Reconnect wakes up rspns q */
534 /* Now we will reread sock */
537 } else if ((length
== -ERESTARTSYS
) ||
538 (length
== -EAGAIN
)) {
539 msleep(1); /* minimum sleep to prevent looping,
540 allowing socket to clear and app
541 threads to set tcpStatus
542 CifsNeedReconnect if server hung*/
545 } else if (length
<= 0) {
546 cERROR(1, "Received no data, expecting %d",
547 pdu_length
- total_read
);
548 cifs_reconnect(server
);
549 csocket
= server
->ssocket
;
556 else if (reconnect
== 1)
559 length
+= 4; /* account for rfc1002 hdr */
562 dump_smb(smb_buffer
, length
);
563 if (checkSMB(smb_buffer
, smb_buffer
->Mid
, total_read
+4)) {
564 cifs_dump_mem("Bad SMB: ", smb_buffer
, 48);
570 spin_lock(&GlobalMid_Lock
);
571 list_for_each(tmp
, &server
->pending_mid_q
) {
572 mid_entry
= list_entry(tmp
, struct mid_q_entry
, qhead
);
574 if ((mid_entry
->mid
== smb_buffer
->Mid
) &&
575 (mid_entry
->midState
== MID_REQUEST_SUBMITTED
) &&
576 (mid_entry
->command
== smb_buffer
->Command
)) {
577 if (check2ndT2(smb_buffer
,server
->maxBuf
) > 0) {
578 /* We have a multipart transact2 resp */
580 if (mid_entry
->resp_buf
) {
581 /* merge response - fix up 1st*/
582 if (coalesce_t2(smb_buffer
,
583 mid_entry
->resp_buf
)) {
584 mid_entry
->multiRsp
=
588 /* all parts received */
589 mid_entry
->multiEnd
=
595 cERROR(1, "1st trans2 resp needs bigbuf");
596 /* BB maybe we can fix this up, switch
597 to already allocated large buffer? */
599 /* Have first buffer */
600 mid_entry
->resp_buf
=
602 mid_entry
->largeBuf
=
609 mid_entry
->resp_buf
= smb_buffer
;
610 mid_entry
->largeBuf
= isLargeBuf
;
612 task_to_wake
= mid_entry
->tsk
;
613 mid_entry
->midState
= MID_RESPONSE_RECEIVED
;
614 #ifdef CONFIG_CIFS_STATS2
615 mid_entry
->when_received
= jiffies
;
617 /* so we do not time out requests to server
618 which is still responding (since server could
619 be busy but not dead) */
620 server
->lstrp
= jiffies
;
624 spin_unlock(&GlobalMid_Lock
);
626 /* Was previous buf put in mpx struct for multi-rsp? */
628 /* smb buffer will be freed by user thread */
634 wake_up_process(task_to_wake
);
635 } else if (!is_valid_oplock_break(smb_buffer
, server
) &&
637 cERROR(1, "No task to wake, unknown frame received! "
638 "NumMids %d", midCount
.counter
);
639 cifs_dump_mem("Received Data is: ", (char *)smb_buffer
,
640 sizeof(struct smb_hdr
));
641 #ifdef CONFIG_CIFS_DEBUG2
642 cifs_dump_detail(smb_buffer
);
643 cifs_dump_mids(server
);
644 #endif /* CIFS_DEBUG2 */
647 } /* end while !EXITING */
649 /* take it off the list, if it's not already */
650 write_lock(&cifs_tcp_ses_lock
);
651 list_del_init(&server
->tcp_ses_list
);
652 write_unlock(&cifs_tcp_ses_lock
);
654 spin_lock(&GlobalMid_Lock
);
655 server
->tcpStatus
= CifsExiting
;
656 spin_unlock(&GlobalMid_Lock
);
657 wake_up_all(&server
->response_q
);
659 /* check if we have blocked requests that need to free */
660 /* Note that cifs_max_pending is normally 50, but
661 can be set at module install time to as little as two */
662 spin_lock(&GlobalMid_Lock
);
663 if (atomic_read(&server
->inFlight
) >= cifs_max_pending
)
664 atomic_set(&server
->inFlight
, cifs_max_pending
- 1);
665 /* We do not want to set the max_pending too low or we
666 could end up with the counter going negative */
667 spin_unlock(&GlobalMid_Lock
);
668 /* Although there should not be any requests blocked on
669 this queue it can not hurt to be paranoid and try to wake up requests
670 that may haven been blocked when more than 50 at time were on the wire
671 to the same server - they now will see the session is in exit state
672 and get out of SendReceive. */
673 wake_up_all(&server
->request_q
);
674 /* give those requests time to exit */
677 if (server
->ssocket
) {
678 sock_release(csocket
);
679 server
->ssocket
= NULL
;
681 /* buffer usuallly freed in free_mid - need to free it here on exit */
682 cifs_buf_release(bigbuf
);
683 if (smallbuf
) /* no sense logging a debug message if NULL */
684 cifs_small_buf_release(smallbuf
);
687 * BB: we shouldn't have to do any of this. It shouldn't be
688 * possible to exit from the thread with active SMB sessions
690 read_lock(&cifs_tcp_ses_lock
);
691 if (list_empty(&server
->pending_mid_q
)) {
692 /* loop through server session structures attached to this and
694 list_for_each(tmp
, &server
->smb_ses_list
) {
695 ses
= list_entry(tmp
, struct cifsSesInfo
,
697 ses
->status
= CifsExiting
;
700 read_unlock(&cifs_tcp_ses_lock
);
702 /* although we can not zero the server struct pointer yet,
703 since there are active requests which may depnd on them,
704 mark the corresponding SMB sessions as exiting too */
705 list_for_each(tmp
, &server
->smb_ses_list
) {
706 ses
= list_entry(tmp
, struct cifsSesInfo
,
708 ses
->status
= CifsExiting
;
711 spin_lock(&GlobalMid_Lock
);
712 list_for_each(tmp
, &server
->pending_mid_q
) {
713 mid_entry
= list_entry(tmp
, struct mid_q_entry
, qhead
);
714 if (mid_entry
->midState
== MID_REQUEST_SUBMITTED
) {
715 cFYI(1, "Clearing Mid 0x%x - waking up ",
717 task_to_wake
= mid_entry
->tsk
;
719 wake_up_process(task_to_wake
);
722 spin_unlock(&GlobalMid_Lock
);
723 read_unlock(&cifs_tcp_ses_lock
);
724 /* 1/8th of sec is more than enough time for them to exit */
728 if (!list_empty(&server
->pending_mid_q
)) {
729 /* mpx threads have not exited yet give them
730 at least the smb send timeout time for long ops */
731 /* due to delays on oplock break requests, we need
732 to wait at least 45 seconds before giving up
733 on a request getting a response and going ahead
735 cFYI(1, "Wait for exit from demultiplex thread");
737 /* if threads still have not exited they are probably never
738 coming home not much else we can do but free the memory */
741 /* last chance to mark ses pointers invalid
742 if there are any pointing to this (e.g
743 if a crazy root user tried to kill cifsd
744 kernel thread explicitly this might happen) */
745 /* BB: This shouldn't be necessary, see above */
746 read_lock(&cifs_tcp_ses_lock
);
747 list_for_each(tmp
, &server
->smb_ses_list
) {
748 ses
= list_entry(tmp
, struct cifsSesInfo
, smb_ses_list
);
751 read_unlock(&cifs_tcp_ses_lock
);
753 kfree(server
->hostname
);
754 task_to_wake
= xchg(&server
->tsk
, NULL
);
757 length
= atomic_dec_return(&tcpSesAllocCount
);
759 mempool_resize(cifs_req_poolp
, length
+ cifs_min_rcv
,
762 /* if server->tsk was NULL then wait for a signal before exiting */
764 set_current_state(TASK_INTERRUPTIBLE
);
765 while (!signal_pending(current
)) {
767 set_current_state(TASK_INTERRUPTIBLE
);
769 set_current_state(TASK_RUNNING
);
772 module_put_and_exit(0);
775 /* extract the host portion of the UNC string */
777 extract_hostname(const char *unc
)
783 /* skip double chars at beginning of string */
784 /* BB: check validity of these bytes? */
787 /* delimiter between hostname and sharename is always '\\' now */
788 delim
= strchr(src
, '\\');
790 return ERR_PTR(-EINVAL
);
793 dst
= kmalloc((len
+ 1), GFP_KERNEL
);
795 return ERR_PTR(-ENOMEM
);
797 memcpy(dst
, src
, len
);
804 cifs_parse_mount_options(char *options
, const char *devname
,
809 unsigned int temp_len
, i
, j
;
811 short int override_uid
= -1;
812 short int override_gid
= -1;
813 bool uid_specified
= false;
814 bool gid_specified
= false;
819 if (Local_System_Name
[0] != 0)
820 memcpy(vol
->source_rfc1001_name
, Local_System_Name
, 15);
822 char *nodename
= utsname()->nodename
;
823 int n
= strnlen(nodename
, 15);
824 memset(vol
->source_rfc1001_name
, 0x20, 15);
825 for (i
= 0; i
< n
; i
++) {
826 /* does not have to be perfect mapping since field is
827 informational, only used for servers that do not support
828 port 445 and it can be overridden at mount time */
829 vol
->source_rfc1001_name
[i
] = toupper(nodename
[i
]);
832 vol
->source_rfc1001_name
[15] = 0;
833 /* null target name indicates to use *SMBSERVR default called name
834 if we end up sending RFC1001 session initialize */
835 vol
->target_rfc1001_name
[0] = 0;
836 vol
->cred_uid
= current_uid();
837 vol
->linux_uid
= current_uid();
838 vol
->linux_gid
= current_gid();
840 /* default to only allowing write access to owner of the mount */
841 vol
->dir_mode
= vol
->file_mode
= S_IRUGO
| S_IXUGO
| S_IWUSR
;
843 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
844 /* default is always to request posix paths. */
845 vol
->posix_paths
= 1;
846 /* default to using server inode numbers where available */
849 /* XXX: default to fsc for testing until mount.cifs pieces are done */
855 if (strncmp(options
, "sep=", 4) == 0) {
856 if (options
[4] != 0) {
857 separator
[0] = options
[4];
860 cFYI(1, "Null separator not allowed");
864 while ((data
= strsep(&options
, separator
)) != NULL
) {
867 if ((value
= strchr(data
, '=')) != NULL
)
870 /* Have to parse this before we parse for "user" */
871 if (strnicmp(data
, "user_xattr", 10) == 0) {
873 } else if (strnicmp(data
, "nouser_xattr", 12) == 0) {
875 } else if (strnicmp(data
, "user", 4) == 0) {
878 "CIFS: invalid or missing username\n");
879 return 1; /* needs_arg; */
880 } else if (!*value
) {
881 /* null user, ie anonymous, authentication */
884 if (strnlen(value
, 200) < 200) {
885 vol
->username
= value
;
887 printk(KERN_WARNING
"CIFS: username too long\n");
890 } else if (strnicmp(data
, "pass", 4) == 0) {
892 vol
->password
= NULL
;
894 } else if (value
[0] == 0) {
895 /* check if string begins with double comma
896 since that would mean the password really
897 does start with a comma, and would not
898 indicate an empty string */
899 if (value
[1] != separator
[0]) {
900 vol
->password
= NULL
;
904 temp_len
= strlen(value
);
905 /* removed password length check, NTLM passwords
906 can be arbitrarily long */
908 /* if comma in password, the string will be
909 prematurely null terminated. Commas in password are
910 specified across the cifs mount interface by a double
911 comma ie ,, and a comma used as in other cases ie ','
912 as a parameter delimiter/separator is single and due
913 to the strsep above is temporarily zeroed. */
915 /* NB: password legally can have multiple commas and
916 the only illegal character in a password is null */
918 if ((value
[temp_len
] == 0) &&
919 (value
[temp_len
+1] == separator
[0])) {
921 value
[temp_len
] = separator
[0];
922 temp_len
+= 2; /* move after second comma */
923 while (value
[temp_len
] != 0) {
924 if (value
[temp_len
] == separator
[0]) {
925 if (value
[temp_len
+1] ==
927 /* skip second comma */
930 /* single comma indicating start
937 if (value
[temp_len
] == 0) {
941 /* point option to start of next parm */
942 options
= value
+ temp_len
+ 1;
944 /* go from value to value + temp_len condensing
945 double commas to singles. Note that this ends up
946 allocating a few bytes too many, which is ok */
947 vol
->password
= kzalloc(temp_len
, GFP_KERNEL
);
948 if (vol
->password
== NULL
) {
949 printk(KERN_WARNING
"CIFS: no memory "
953 for (i
= 0, j
= 0; i
< temp_len
; i
++, j
++) {
954 vol
->password
[j
] = value
[i
];
955 if (value
[i
] == separator
[0]
956 && value
[i
+1] == separator
[0]) {
957 /* skip second comma */
961 vol
->password
[j
] = 0;
963 vol
->password
= kzalloc(temp_len
+1, GFP_KERNEL
);
964 if (vol
->password
== NULL
) {
965 printk(KERN_WARNING
"CIFS: no memory "
969 strcpy(vol
->password
, value
);
971 } else if (!strnicmp(data
, "ip", 2) ||
972 !strnicmp(data
, "addr", 4)) {
973 if (!value
|| !*value
) {
975 } else if (strnlen(value
, INET6_ADDRSTRLEN
) <
979 printk(KERN_WARNING
"CIFS: ip address "
983 } else if (strnicmp(data
, "sec", 3) == 0) {
984 if (!value
|| !*value
) {
985 cERROR(1, "no security value specified");
987 } else if (strnicmp(value
, "krb5i", 5) == 0) {
988 vol
->secFlg
|= CIFSSEC_MAY_KRB5
|
990 } else if (strnicmp(value
, "krb5p", 5) == 0) {
991 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
993 cERROR(1, "Krb5 cifs privacy not supported");
995 } else if (strnicmp(value
, "krb5", 4) == 0) {
996 vol
->secFlg
|= CIFSSEC_MAY_KRB5
;
997 #ifdef CONFIG_CIFS_EXPERIMENTAL
998 } else if (strnicmp(value
, "ntlmsspi", 8) == 0) {
999 vol
->secFlg
|= CIFSSEC_MAY_NTLMSSP
|
1001 } else if (strnicmp(value
, "ntlmssp", 7) == 0) {
1002 vol
->secFlg
|= CIFSSEC_MAY_NTLMSSP
;
1004 } else if (strnicmp(value
, "ntlmv2i", 7) == 0) {
1005 vol
->secFlg
|= CIFSSEC_MAY_NTLMV2
|
1007 } else if (strnicmp(value
, "ntlmv2", 6) == 0) {
1008 vol
->secFlg
|= CIFSSEC_MAY_NTLMV2
;
1009 } else if (strnicmp(value
, "ntlmi", 5) == 0) {
1010 vol
->secFlg
|= CIFSSEC_MAY_NTLM
|
1012 } else if (strnicmp(value
, "ntlm", 4) == 0) {
1013 /* ntlm is default so can be turned off too */
1014 vol
->secFlg
|= CIFSSEC_MAY_NTLM
;
1015 } else if (strnicmp(value
, "nontlm", 6) == 0) {
1016 /* BB is there a better way to do this? */
1017 vol
->secFlg
|= CIFSSEC_MAY_NTLMV2
;
1018 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1019 } else if (strnicmp(value
, "lanman", 6) == 0) {
1020 vol
->secFlg
|= CIFSSEC_MAY_LANMAN
;
1022 } else if (strnicmp(value
, "none", 4) == 0) {
1025 cERROR(1, "bad security option: %s", value
);
1028 } else if ((strnicmp(data
, "unc", 3) == 0)
1029 || (strnicmp(data
, "target", 6) == 0)
1030 || (strnicmp(data
, "path", 4) == 0)) {
1031 if (!value
|| !*value
) {
1032 printk(KERN_WARNING
"CIFS: invalid path to "
1033 "network resource\n");
1034 return 1; /* needs_arg; */
1036 if ((temp_len
= strnlen(value
, 300)) < 300) {
1037 vol
->UNC
= kmalloc(temp_len
+1, GFP_KERNEL
);
1038 if (vol
->UNC
== NULL
)
1040 strcpy(vol
->UNC
, value
);
1041 if (strncmp(vol
->UNC
, "//", 2) == 0) {
1044 } else if (strncmp(vol
->UNC
, "\\\\", 2) != 0) {
1046 "CIFS: UNC Path does not begin "
1047 "with // or \\\\ \n");
1051 printk(KERN_WARNING
"CIFS: UNC name too long\n");
1054 } else if ((strnicmp(data
, "domain", 3) == 0)
1055 || (strnicmp(data
, "workgroup", 5) == 0)) {
1056 if (!value
|| !*value
) {
1057 printk(KERN_WARNING
"CIFS: invalid domain name\n");
1058 return 1; /* needs_arg; */
1060 /* BB are there cases in which a comma can be valid in
1061 a domain name and need special handling? */
1062 if (strnlen(value
, 256) < 256) {
1063 vol
->domainname
= value
;
1064 cFYI(1, "Domain name set");
1066 printk(KERN_WARNING
"CIFS: domain name too "
1070 } else if (strnicmp(data
, "prefixpath", 10) == 0) {
1071 if (!value
|| !*value
) {
1073 "CIFS: invalid path prefix\n");
1074 return 1; /* needs_argument */
1076 if ((temp_len
= strnlen(value
, 1024)) < 1024) {
1077 if (value
[0] != '/')
1078 temp_len
++; /* missing leading slash */
1079 vol
->prepath
= kmalloc(temp_len
+1, GFP_KERNEL
);
1080 if (vol
->prepath
== NULL
)
1082 if (value
[0] != '/') {
1083 vol
->prepath
[0] = '/';
1084 strcpy(vol
->prepath
+1, value
);
1086 strcpy(vol
->prepath
, value
);
1087 cFYI(1, "prefix path %s", vol
->prepath
);
1089 printk(KERN_WARNING
"CIFS: prefix too long\n");
1092 } else if (strnicmp(data
, "iocharset", 9) == 0) {
1093 if (!value
|| !*value
) {
1094 printk(KERN_WARNING
"CIFS: invalid iocharset "
1096 return 1; /* needs_arg; */
1098 if (strnlen(value
, 65) < 65) {
1099 if (strnicmp(value
, "default", 7))
1100 vol
->iocharset
= value
;
1101 /* if iocharset not set then load_nls_default
1102 is used by caller */
1103 cFYI(1, "iocharset set to %s", value
);
1105 printk(KERN_WARNING
"CIFS: iocharset name "
1109 } else if (!strnicmp(data
, "uid", 3) && value
&& *value
) {
1110 vol
->linux_uid
= simple_strtoul(value
, &value
, 0);
1111 uid_specified
= true;
1112 } else if (!strnicmp(data
, "forceuid", 8)) {
1114 } else if (!strnicmp(data
, "noforceuid", 10)) {
1116 } else if (!strnicmp(data
, "gid", 3) && value
&& *value
) {
1117 vol
->linux_gid
= simple_strtoul(value
, &value
, 0);
1118 gid_specified
= true;
1119 } else if (!strnicmp(data
, "forcegid", 8)) {
1121 } else if (!strnicmp(data
, "noforcegid", 10)) {
1123 } else if (strnicmp(data
, "file_mode", 4) == 0) {
1124 if (value
&& *value
) {
1126 simple_strtoul(value
, &value
, 0);
1128 } else if (strnicmp(data
, "dir_mode", 4) == 0) {
1129 if (value
&& *value
) {
1131 simple_strtoul(value
, &value
, 0);
1133 } else if (strnicmp(data
, "dirmode", 4) == 0) {
1134 if (value
&& *value
) {
1136 simple_strtoul(value
, &value
, 0);
1138 } else if (strnicmp(data
, "port", 4) == 0) {
1139 if (value
&& *value
) {
1141 simple_strtoul(value
, &value
, 0);
1143 } else if (strnicmp(data
, "rsize", 5) == 0) {
1144 if (value
&& *value
) {
1146 simple_strtoul(value
, &value
, 0);
1148 } else if (strnicmp(data
, "wsize", 5) == 0) {
1149 if (value
&& *value
) {
1151 simple_strtoul(value
, &value
, 0);
1153 } else if (strnicmp(data
, "sockopt", 5) == 0) {
1154 if (!value
|| !*value
) {
1155 cERROR(1, "no socket option specified");
1157 } else if (strnicmp(value
, "TCP_NODELAY", 11) == 0) {
1158 vol
->sockopt_tcp_nodelay
= 1;
1160 } else if (strnicmp(data
, "netbiosname", 4) == 0) {
1161 if (!value
|| !*value
|| (*value
== ' ')) {
1162 cFYI(1, "invalid (empty) netbiosname");
1164 memset(vol
->source_rfc1001_name
, 0x20, 15);
1165 for (i
= 0; i
< 15; i
++) {
1166 /* BB are there cases in which a comma can be
1167 valid in this workstation netbios name (and need
1168 special handling)? */
1170 /* We do not uppercase netbiosname for user */
1174 vol
->source_rfc1001_name
[i
] =
1177 /* The string has 16th byte zero still from
1178 set at top of the function */
1179 if ((i
== 15) && (value
[i
] != 0))
1180 printk(KERN_WARNING
"CIFS: netbiosname"
1181 " longer than 15 truncated.\n");
1183 } else if (strnicmp(data
, "servern", 7) == 0) {
1184 /* servernetbiosname specified override *SMBSERVER */
1185 if (!value
|| !*value
|| (*value
== ' ')) {
1186 cFYI(1, "empty server netbiosname specified");
1188 /* last byte, type, is 0x20 for servr type */
1189 memset(vol
->target_rfc1001_name
, 0x20, 16);
1191 for (i
= 0; i
< 15; i
++) {
1192 /* BB are there cases in which a comma can be
1193 valid in this workstation netbios name
1194 (and need special handling)? */
1196 /* user or mount helper must uppercase
1201 vol
->target_rfc1001_name
[i
] =
1204 /* The string has 16th byte zero still from
1205 set at top of the function */
1206 if ((i
== 15) && (value
[i
] != 0))
1207 printk(KERN_WARNING
"CIFS: server net"
1208 "biosname longer than 15 truncated.\n");
1210 } else if (strnicmp(data
, "credentials", 4) == 0) {
1212 } else if (strnicmp(data
, "version", 3) == 0) {
1214 } else if (strnicmp(data
, "guest", 5) == 0) {
1216 } else if (strnicmp(data
, "rw", 2) == 0) {
1218 } else if (strnicmp(data
, "ro", 2) == 0) {
1220 } else if (strnicmp(data
, "noblocksend", 11) == 0) {
1221 vol
->noblocksnd
= 1;
1222 } else if (strnicmp(data
, "noautotune", 10) == 0) {
1223 vol
->noautotune
= 1;
1224 } else if ((strnicmp(data
, "suid", 4) == 0) ||
1225 (strnicmp(data
, "nosuid", 6) == 0) ||
1226 (strnicmp(data
, "exec", 4) == 0) ||
1227 (strnicmp(data
, "noexec", 6) == 0) ||
1228 (strnicmp(data
, "nodev", 5) == 0) ||
1229 (strnicmp(data
, "noauto", 6) == 0) ||
1230 (strnicmp(data
, "dev", 3) == 0)) {
1231 /* The mount tool or mount.cifs helper (if present)
1232 uses these opts to set flags, and the flags are read
1233 by the kernel vfs layer before we get here (ie
1234 before read super) so there is no point trying to
1235 parse these options again and set anything and it
1236 is ok to just ignore them */
1238 } else if (strnicmp(data
, "hard", 4) == 0) {
1240 } else if (strnicmp(data
, "soft", 4) == 0) {
1242 } else if (strnicmp(data
, "perm", 4) == 0) {
1244 } else if (strnicmp(data
, "noperm", 6) == 0) {
1246 } else if (strnicmp(data
, "mapchars", 8) == 0) {
1248 } else if (strnicmp(data
, "nomapchars", 10) == 0) {
1250 } else if (strnicmp(data
, "sfu", 3) == 0) {
1252 } else if (strnicmp(data
, "nosfu", 5) == 0) {
1254 } else if (strnicmp(data
, "nodfs", 5) == 0) {
1256 } else if (strnicmp(data
, "posixpaths", 10) == 0) {
1257 vol
->posix_paths
= 1;
1258 } else if (strnicmp(data
, "noposixpaths", 12) == 0) {
1259 vol
->posix_paths
= 0;
1260 } else if (strnicmp(data
, "nounix", 6) == 0) {
1261 vol
->no_linux_ext
= 1;
1262 } else if (strnicmp(data
, "nolinux", 7) == 0) {
1263 vol
->no_linux_ext
= 1;
1264 } else if ((strnicmp(data
, "nocase", 6) == 0) ||
1265 (strnicmp(data
, "ignorecase", 10) == 0)) {
1267 } else if (strnicmp(data
, "brl", 3) == 0) {
1269 } else if ((strnicmp(data
, "nobrl", 5) == 0) ||
1270 (strnicmp(data
, "nolock", 6) == 0)) {
1272 /* turn off mandatory locking in mode
1273 if remote locking is turned off since the
1274 local vfs will do advisory */
1275 if (vol
->file_mode
==
1276 (S_IALLUGO
& ~(S_ISUID
| S_IXGRP
)))
1277 vol
->file_mode
= S_IALLUGO
;
1278 } else if (strnicmp(data
, "forcemandatorylock", 9) == 0) {
1279 /* will take the shorter form "forcemand" as well */
1280 /* This mount option will force use of mandatory
1281 (DOS/Windows style) byte range locks, instead of
1282 using posix advisory byte range locks, even if the
1283 Unix extensions are available and posix locks would
1284 be supported otherwise. If Unix extensions are not
1285 negotiated this has no effect since mandatory locks
1286 would be used (mandatory locks is all that those
1287 those servers support) */
1289 } else if (strnicmp(data
, "setuids", 7) == 0) {
1291 } else if (strnicmp(data
, "nosetuids", 9) == 0) {
1293 } else if (strnicmp(data
, "dynperm", 7) == 0) {
1294 vol
->dynperm
= true;
1295 } else if (strnicmp(data
, "nodynperm", 9) == 0) {
1296 vol
->dynperm
= false;
1297 } else if (strnicmp(data
, "nohard", 6) == 0) {
1299 } else if (strnicmp(data
, "nosoft", 6) == 0) {
1301 } else if (strnicmp(data
, "nointr", 6) == 0) {
1303 } else if (strnicmp(data
, "intr", 4) == 0) {
1305 } else if (strnicmp(data
, "nostrictsync", 12) == 0) {
1306 vol
->nostrictsync
= 1;
1307 } else if (strnicmp(data
, "strictsync", 10) == 0) {
1308 vol
->nostrictsync
= 0;
1309 } else if (strnicmp(data
, "serverino", 7) == 0) {
1310 vol
->server_ino
= 1;
1311 } else if (strnicmp(data
, "noserverino", 9) == 0) {
1312 vol
->server_ino
= 0;
1313 } else if (strnicmp(data
, "cifsacl", 7) == 0) {
1315 } else if (strnicmp(data
, "nocifsacl", 9) == 0) {
1317 } else if (strnicmp(data
, "acl", 3) == 0) {
1318 vol
->no_psx_acl
= 0;
1319 } else if (strnicmp(data
, "noacl", 5) == 0) {
1320 vol
->no_psx_acl
= 1;
1321 #ifdef CONFIG_CIFS_EXPERIMENTAL
1322 } else if (strnicmp(data
, "locallease", 6) == 0) {
1323 vol
->local_lease
= 1;
1325 } else if (strnicmp(data
, "sign", 4) == 0) {
1326 vol
->secFlg
|= CIFSSEC_MUST_SIGN
;
1327 } else if (strnicmp(data
, "seal", 4) == 0) {
1328 /* we do not do the following in secFlags because seal
1329 is a per tree connection (mount) not a per socket
1330 or per-smb connection option in the protocol */
1331 /* vol->secFlg |= CIFSSEC_MUST_SEAL; */
1333 } else if (strnicmp(data
, "direct", 6) == 0) {
1335 } else if (strnicmp(data
, "forcedirectio", 13) == 0) {
1337 } else if (strnicmp(data
, "noac", 4) == 0) {
1338 printk(KERN_WARNING
"CIFS: Mount option noac not "
1339 "supported. Instead set "
1340 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1341 } else if (strnicmp(data
, "fsc", 3) == 0) {
1344 printk(KERN_WARNING
"CIFS: Unknown mount option %s\n",
1347 if (vol
->UNC
== NULL
) {
1348 if (devname
== NULL
) {
1349 printk(KERN_WARNING
"CIFS: Missing UNC name for mount "
1353 if ((temp_len
= strnlen(devname
, 300)) < 300) {
1354 vol
->UNC
= kmalloc(temp_len
+1, GFP_KERNEL
);
1355 if (vol
->UNC
== NULL
)
1357 strcpy(vol
->UNC
, devname
);
1358 if (strncmp(vol
->UNC
, "//", 2) == 0) {
1361 } else if (strncmp(vol
->UNC
, "\\\\", 2) != 0) {
1362 printk(KERN_WARNING
"CIFS: UNC Path does not "
1363 "begin with // or \\\\ \n");
1366 value
= strpbrk(vol
->UNC
+2, "/\\");
1370 printk(KERN_WARNING
"CIFS: UNC name too long\n");
1374 if (vol
->UNCip
== NULL
)
1375 vol
->UNCip
= &vol
->UNC
[2];
1378 vol
->override_uid
= override_uid
;
1379 else if (override_uid
== 1)
1380 printk(KERN_NOTICE
"CIFS: ignoring forceuid mount option "
1381 "specified with no uid= option.\n");
1384 vol
->override_gid
= override_gid
;
1385 else if (override_gid
== 1)
1386 printk(KERN_NOTICE
"CIFS: ignoring forcegid mount option "
1387 "specified with no gid= option.\n");
1393 match_address(struct TCP_Server_Info
*server
, struct sockaddr
*addr
)
1395 struct sockaddr_in
*addr4
= (struct sockaddr_in
*)addr
;
1396 struct sockaddr_in6
*addr6
= (struct sockaddr_in6
*)addr
;
1398 switch (addr
->sa_family
) {
1400 if (addr4
->sin_addr
.s_addr
!=
1401 server
->addr
.sockAddr
.sin_addr
.s_addr
)
1403 if (addr4
->sin_port
&&
1404 addr4
->sin_port
!= server
->addr
.sockAddr
.sin_port
)
1408 if (!ipv6_addr_equal(&addr6
->sin6_addr
,
1409 &server
->addr
.sockAddr6
.sin6_addr
))
1411 if (addr6
->sin6_scope_id
!=
1412 server
->addr
.sockAddr6
.sin6_scope_id
)
1414 if (addr6
->sin6_port
&&
1415 addr6
->sin6_port
!= server
->addr
.sockAddr6
.sin6_port
)
1424 match_security(struct TCP_Server_Info
*server
, struct smb_vol
*vol
)
1426 unsigned int secFlags
;
1428 if (vol
->secFlg
& (~(CIFSSEC_MUST_SIGN
| CIFSSEC_MUST_SEAL
)))
1429 secFlags
= vol
->secFlg
;
1431 secFlags
= global_secflags
| vol
->secFlg
;
1433 switch (server
->secType
) {
1435 if (!(secFlags
& (CIFSSEC_MAY_LANMAN
|CIFSSEC_MAY_PLNTXT
)))
1439 if (!(secFlags
& CIFSSEC_MAY_NTLMV2
))
1443 if (!(secFlags
& CIFSSEC_MAY_NTLM
))
1447 if (!(secFlags
& CIFSSEC_MAY_KRB5
))
1451 if (!(secFlags
& CIFSSEC_MAY_NTLMSSP
))
1455 /* shouldn't happen */
1459 /* now check if signing mode is acceptible */
1460 if ((secFlags
& CIFSSEC_MAY_SIGN
) == 0 &&
1461 (server
->secMode
& SECMODE_SIGN_REQUIRED
))
1463 else if (((secFlags
& CIFSSEC_MUST_SIGN
) == CIFSSEC_MUST_SIGN
) &&
1465 (SECMODE_SIGN_ENABLED
|SECMODE_SIGN_REQUIRED
)) == 0)
1471 static struct TCP_Server_Info
*
1472 cifs_find_tcp_session(struct sockaddr
*addr
, struct smb_vol
*vol
)
1474 struct TCP_Server_Info
*server
;
1476 write_lock(&cifs_tcp_ses_lock
);
1477 list_for_each_entry(server
, &cifs_tcp_ses_list
, tcp_ses_list
) {
1479 * the demux thread can exit on its own while still in CifsNew
1480 * so don't accept any sockets in that state. Since the
1481 * tcpStatus never changes back to CifsNew it's safe to check
1482 * for this without a lock.
1484 if (server
->tcpStatus
== CifsNew
)
1487 if (!match_address(server
, addr
))
1490 if (!match_security(server
, vol
))
1493 ++server
->srv_count
;
1494 write_unlock(&cifs_tcp_ses_lock
);
1495 cFYI(1, "Existing tcp session with server found");
1498 write_unlock(&cifs_tcp_ses_lock
);
1503 cifs_put_tcp_session(struct TCP_Server_Info
*server
)
1505 struct task_struct
*task
;
1507 write_lock(&cifs_tcp_ses_lock
);
1508 if (--server
->srv_count
> 0) {
1509 write_unlock(&cifs_tcp_ses_lock
);
1513 list_del_init(&server
->tcp_ses_list
);
1514 write_unlock(&cifs_tcp_ses_lock
);
1516 spin_lock(&GlobalMid_Lock
);
1517 server
->tcpStatus
= CifsExiting
;
1518 spin_unlock(&GlobalMid_Lock
);
1520 cifs_fscache_release_client_cookie(server
);
1522 task
= xchg(&server
->tsk
, NULL
);
1524 force_sig(SIGKILL
, task
);
1527 static struct TCP_Server_Info
*
1528 cifs_get_tcp_session(struct smb_vol
*volume_info
)
1530 struct TCP_Server_Info
*tcp_ses
= NULL
;
1531 struct sockaddr_storage addr
;
1532 struct sockaddr_in
*sin_server
= (struct sockaddr_in
*) &addr
;
1533 struct sockaddr_in6
*sin_server6
= (struct sockaddr_in6
*) &addr
;
1536 memset(&addr
, 0, sizeof(struct sockaddr_storage
));
1538 cFYI(1, "UNC: %s ip: %s", volume_info
->UNC
, volume_info
->UNCip
);
1540 if (volume_info
->UNCip
&& volume_info
->UNC
) {
1541 rc
= cifs_fill_sockaddr((struct sockaddr
*)&addr
,
1545 /* we failed translating address */
1549 } else if (volume_info
->UNCip
) {
1550 /* BB using ip addr as tcp_ses name to connect to the
1552 cERROR(1, "Connecting to DFS root not implemented yet");
1555 } else /* which tcp_sess DFS root would we conect to */ {
1556 cERROR(1, "CIFS mount error: No UNC path (e.g. -o "
1557 "unc=//192.168.1.100/public) specified");
1562 /* see if we already have a matching tcp_ses */
1563 tcp_ses
= cifs_find_tcp_session((struct sockaddr
*)&addr
, volume_info
);
1567 tcp_ses
= kzalloc(sizeof(struct TCP_Server_Info
), GFP_KERNEL
);
1573 tcp_ses
->hostname
= extract_hostname(volume_info
->UNC
);
1574 if (IS_ERR(tcp_ses
->hostname
)) {
1575 rc
= PTR_ERR(tcp_ses
->hostname
);
1579 tcp_ses
->noblocksnd
= volume_info
->noblocksnd
;
1580 tcp_ses
->noautotune
= volume_info
->noautotune
;
1581 tcp_ses
->tcp_nodelay
= volume_info
->sockopt_tcp_nodelay
;
1582 atomic_set(&tcp_ses
->inFlight
, 0);
1583 init_waitqueue_head(&tcp_ses
->response_q
);
1584 init_waitqueue_head(&tcp_ses
->request_q
);
1585 INIT_LIST_HEAD(&tcp_ses
->pending_mid_q
);
1586 mutex_init(&tcp_ses
->srv_mutex
);
1587 memcpy(tcp_ses
->workstation_RFC1001_name
,
1588 volume_info
->source_rfc1001_name
, RFC1001_NAME_LEN_WITH_NULL
);
1589 memcpy(tcp_ses
->server_RFC1001_name
,
1590 volume_info
->target_rfc1001_name
, RFC1001_NAME_LEN_WITH_NULL
);
1591 tcp_ses
->sequence_number
= 0;
1592 INIT_LIST_HEAD(&tcp_ses
->tcp_ses_list
);
1593 INIT_LIST_HEAD(&tcp_ses
->smb_ses_list
);
1596 * at this point we are the only ones with the pointer
1597 * to the struct since the kernel thread not created yet
1598 * no need to spinlock this init of tcpStatus or srv_count
1600 tcp_ses
->tcpStatus
= CifsNew
;
1601 ++tcp_ses
->srv_count
;
1603 if (addr
.ss_family
== AF_INET6
) {
1604 cFYI(1, "attempting ipv6 connect");
1605 /* BB should we allow ipv6 on port 139? */
1606 /* other OS never observed in Wild doing 139 with v6 */
1607 memcpy(&tcp_ses
->addr
.sockAddr6
, sin_server6
,
1608 sizeof(struct sockaddr_in6
));
1609 rc
= ipv6_connect(tcp_ses
);
1611 memcpy(&tcp_ses
->addr
.sockAddr
, sin_server
,
1612 sizeof(struct sockaddr_in
));
1613 rc
= ipv4_connect(tcp_ses
);
1616 cERROR(1, "Error connecting to socket. Aborting operation");
1621 * since we're in a cifs function already, we know that
1622 * this will succeed. No need for try_module_get().
1624 __module_get(THIS_MODULE
);
1625 tcp_ses
->tsk
= kthread_run((void *)(void *)cifs_demultiplex_thread
,
1627 if (IS_ERR(tcp_ses
->tsk
)) {
1628 rc
= PTR_ERR(tcp_ses
->tsk
);
1629 cERROR(1, "error %d create cifsd thread", rc
);
1630 module_put(THIS_MODULE
);
1634 /* thread spawned, put it on the list */
1635 write_lock(&cifs_tcp_ses_lock
);
1636 list_add(&tcp_ses
->tcp_ses_list
, &cifs_tcp_ses_list
);
1637 write_unlock(&cifs_tcp_ses_lock
);
1639 cifs_fscache_get_client_cookie(tcp_ses
);
1645 if (!IS_ERR(tcp_ses
->hostname
))
1646 kfree(tcp_ses
->hostname
);
1647 if (tcp_ses
->ssocket
)
1648 sock_release(tcp_ses
->ssocket
);
1654 static struct cifsSesInfo
*
1655 cifs_find_smb_ses(struct TCP_Server_Info
*server
, struct smb_vol
*vol
)
1657 struct cifsSesInfo
*ses
;
1659 write_lock(&cifs_tcp_ses_lock
);
1660 list_for_each_entry(ses
, &server
->smb_ses_list
, smb_ses_list
) {
1661 switch (server
->secType
) {
1663 if (vol
->cred_uid
!= ses
->cred_uid
)
1667 /* anything else takes username/password */
1668 if (strncmp(ses
->userName
, vol
->username
,
1671 if (strlen(vol
->username
) != 0 &&
1672 strncmp(ses
->password
, vol
->password
,
1677 write_unlock(&cifs_tcp_ses_lock
);
1680 write_unlock(&cifs_tcp_ses_lock
);
1685 cifs_put_smb_ses(struct cifsSesInfo
*ses
)
1688 struct TCP_Server_Info
*server
= ses
->server
;
1690 cFYI(1, "%s: ses_count=%d\n", __func__
, ses
->ses_count
);
1691 write_lock(&cifs_tcp_ses_lock
);
1692 if (--ses
->ses_count
> 0) {
1693 write_unlock(&cifs_tcp_ses_lock
);
1697 list_del_init(&ses
->smb_ses_list
);
1698 write_unlock(&cifs_tcp_ses_lock
);
1700 if (ses
->status
== CifsGood
) {
1702 CIFSSMBLogoff(xid
, ses
);
1706 cifs_put_tcp_session(server
);
1709 static struct cifsSesInfo
*
1710 cifs_get_smb_ses(struct TCP_Server_Info
*server
, struct smb_vol
*volume_info
)
1712 int rc
= -ENOMEM
, xid
;
1713 struct cifsSesInfo
*ses
;
1717 ses
= cifs_find_smb_ses(server
, volume_info
);
1719 cFYI(1, "Existing smb sess found (status=%d)", ses
->status
);
1721 /* existing SMB ses has a server reference already */
1722 cifs_put_tcp_session(server
);
1724 mutex_lock(&ses
->session_mutex
);
1725 rc
= cifs_negotiate_protocol(xid
, ses
);
1727 mutex_unlock(&ses
->session_mutex
);
1728 /* problem -- put our ses reference */
1729 cifs_put_smb_ses(ses
);
1733 if (ses
->need_reconnect
) {
1734 cFYI(1, "Session needs reconnect");
1735 rc
= cifs_setup_session(xid
, ses
,
1736 volume_info
->local_nls
);
1738 mutex_unlock(&ses
->session_mutex
);
1739 /* problem -- put our reference */
1740 cifs_put_smb_ses(ses
);
1745 mutex_unlock(&ses
->session_mutex
);
1750 cFYI(1, "Existing smb sess not found");
1751 ses
= sesInfoAlloc();
1755 /* new SMB session uses our server ref */
1756 ses
->server
= server
;
1757 if (server
->addr
.sockAddr6
.sin6_family
== AF_INET6
)
1758 sprintf(ses
->serverName
, "%pI6",
1759 &server
->addr
.sockAddr6
.sin6_addr
);
1761 sprintf(ses
->serverName
, "%pI4",
1762 &server
->addr
.sockAddr
.sin_addr
.s_addr
);
1764 if (volume_info
->username
)
1765 strncpy(ses
->userName
, volume_info
->username
,
1768 /* volume_info->password freed at unmount */
1769 if (volume_info
->password
) {
1770 ses
->password
= kstrdup(volume_info
->password
, GFP_KERNEL
);
1774 if (volume_info
->domainname
) {
1775 int len
= strlen(volume_info
->domainname
);
1776 ses
->domainName
= kmalloc(len
+ 1, GFP_KERNEL
);
1777 if (ses
->domainName
)
1778 strcpy(ses
->domainName
, volume_info
->domainname
);
1780 ses
->cred_uid
= volume_info
->cred_uid
;
1781 ses
->linux_uid
= volume_info
->linux_uid
;
1782 ses
->overrideSecFlg
= volume_info
->secFlg
;
1784 mutex_lock(&ses
->session_mutex
);
1785 rc
= cifs_negotiate_protocol(xid
, ses
);
1787 rc
= cifs_setup_session(xid
, ses
, volume_info
->local_nls
);
1788 mutex_unlock(&ses
->session_mutex
);
1792 /* success, put it on the list */
1793 write_lock(&cifs_tcp_ses_lock
);
1794 list_add(&ses
->smb_ses_list
, &server
->smb_ses_list
);
1795 write_unlock(&cifs_tcp_ses_lock
);
1806 static struct cifsTconInfo
*
1807 cifs_find_tcon(struct cifsSesInfo
*ses
, const char *unc
)
1809 struct list_head
*tmp
;
1810 struct cifsTconInfo
*tcon
;
1812 write_lock(&cifs_tcp_ses_lock
);
1813 list_for_each(tmp
, &ses
->tcon_list
) {
1814 tcon
= list_entry(tmp
, struct cifsTconInfo
, tcon_list
);
1815 if (tcon
->tidStatus
== CifsExiting
)
1817 if (strncmp(tcon
->treeName
, unc
, MAX_TREE_SIZE
))
1821 write_unlock(&cifs_tcp_ses_lock
);
1824 write_unlock(&cifs_tcp_ses_lock
);
1829 cifs_put_tcon(struct cifsTconInfo
*tcon
)
1832 struct cifsSesInfo
*ses
= tcon
->ses
;
1834 cFYI(1, "%s: tc_count=%d\n", __func__
, tcon
->tc_count
);
1835 write_lock(&cifs_tcp_ses_lock
);
1836 if (--tcon
->tc_count
> 0) {
1837 write_unlock(&cifs_tcp_ses_lock
);
1841 list_del_init(&tcon
->tcon_list
);
1842 write_unlock(&cifs_tcp_ses_lock
);
1845 CIFSSMBTDis(xid
, tcon
);
1849 cifs_fscache_release_super_cookie(tcon
);
1850 cifs_put_smb_ses(ses
);
1853 static struct cifsTconInfo
*
1854 cifs_get_tcon(struct cifsSesInfo
*ses
, struct smb_vol
*volume_info
)
1857 struct cifsTconInfo
*tcon
;
1859 tcon
= cifs_find_tcon(ses
, volume_info
->UNC
);
1861 cFYI(1, "Found match on UNC path");
1862 /* existing tcon already has a reference */
1863 cifs_put_smb_ses(ses
);
1864 if (tcon
->seal
!= volume_info
->seal
)
1865 cERROR(1, "transport encryption setting "
1866 "conflicts with existing tid");
1870 tcon
= tconInfoAlloc();
1877 if (volume_info
->password
) {
1878 tcon
->password
= kstrdup(volume_info
->password
, GFP_KERNEL
);
1879 if (!tcon
->password
) {
1885 if (strchr(volume_info
->UNC
+ 3, '\\') == NULL
1886 && strchr(volume_info
->UNC
+ 3, '/') == NULL
) {
1887 cERROR(1, "Missing share name");
1892 /* BB Do we need to wrap session_mutex around
1893 * this TCon call and Unix SetFS as
1894 * we do on SessSetup and reconnect? */
1896 rc
= CIFSTCon(xid
, ses
, volume_info
->UNC
, tcon
, volume_info
->local_nls
);
1898 cFYI(1, "CIFS Tcon rc = %d", rc
);
1902 if (volume_info
->nodfs
) {
1903 tcon
->Flags
&= ~SMB_SHARE_IS_IN_DFS
;
1904 cFYI(1, "DFS disabled (%d)", tcon
->Flags
);
1906 tcon
->seal
= volume_info
->seal
;
1907 /* we can have only one retry value for a connection
1908 to a share so for resources mounted more than once
1909 to the same server share the last value passed in
1910 for the retry flag is used */
1911 tcon
->retry
= volume_info
->retry
;
1912 tcon
->nocase
= volume_info
->nocase
;
1913 tcon
->local_lease
= volume_info
->local_lease
;
1915 write_lock(&cifs_tcp_ses_lock
);
1916 list_add(&tcon
->tcon_list
, &ses
->tcon_list
);
1917 write_unlock(&cifs_tcp_ses_lock
);
1919 cifs_fscache_get_super_cookie(tcon
);
1930 get_dfs_path(int xid
, struct cifsSesInfo
*pSesInfo
, const char *old_path
,
1931 const struct nls_table
*nls_codepage
, unsigned int *pnum_referrals
,
1932 struct dfs_info3_param
**preferrals
, int remap
)
1937 *pnum_referrals
= 0;
1940 if (pSesInfo
->ipc_tid
== 0) {
1941 temp_unc
= kmalloc(2 /* for slashes */ +
1942 strnlen(pSesInfo
->serverName
,
1943 SERVER_NAME_LEN_WITH_NULL
* 2)
1944 + 1 + 4 /* slash IPC$ */ + 2,
1946 if (temp_unc
== NULL
)
1950 strcpy(temp_unc
+ 2, pSesInfo
->serverName
);
1951 strcpy(temp_unc
+ 2 + strlen(pSesInfo
->serverName
), "\\IPC$");
1952 rc
= CIFSTCon(xid
, pSesInfo
, temp_unc
, NULL
, nls_codepage
);
1953 cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc
, pSesInfo
->ipc_tid
);
1957 rc
= CIFSGetDFSRefer(xid
, pSesInfo
, old_path
, preferrals
,
1958 pnum_referrals
, nls_codepage
, remap
);
1959 /* BB map targetUNCs to dfs_info3 structures, here or
1960 in CIFSGetDFSRefer BB */
1965 #ifdef CONFIG_DEBUG_LOCK_ALLOC
1966 static struct lock_class_key cifs_key
[2];
1967 static struct lock_class_key cifs_slock_key
[2];
1970 cifs_reclassify_socket4(struct socket
*sock
)
1972 struct sock
*sk
= sock
->sk
;
1973 BUG_ON(sock_owned_by_user(sk
));
1974 sock_lock_init_class_and_name(sk
, "slock-AF_INET-CIFS",
1975 &cifs_slock_key
[0], "sk_lock-AF_INET-CIFS", &cifs_key
[0]);
1979 cifs_reclassify_socket6(struct socket
*sock
)
1981 struct sock
*sk
= sock
->sk
;
1982 BUG_ON(sock_owned_by_user(sk
));
1983 sock_lock_init_class_and_name(sk
, "slock-AF_INET6-CIFS",
1984 &cifs_slock_key
[1], "sk_lock-AF_INET6-CIFS", &cifs_key
[1]);
1988 cifs_reclassify_socket4(struct socket
*sock
)
1993 cifs_reclassify_socket6(struct socket
*sock
)
1998 /* See RFC1001 section 14 on representation of Netbios names */
1999 static void rfc1002mangle(char *target
, char *source
, unsigned int length
)
2003 for (i
= 0, j
= 0; i
< (length
); i
++) {
2004 /* mask a nibble at a time and encode */
2005 target
[j
] = 'A' + (0x0F & (source
[i
] >> 4));
2006 target
[j
+1] = 'A' + (0x0F & source
[i
]);
2014 ipv4_connect(struct TCP_Server_Info
*server
)
2018 bool connected
= false;
2019 __be16 orig_port
= 0;
2020 struct socket
*socket
= server
->ssocket
;
2022 if (socket
== NULL
) {
2023 rc
= sock_create_kern(PF_INET
, SOCK_STREAM
,
2024 IPPROTO_TCP
, &socket
);
2026 cERROR(1, "Error %d creating socket", rc
);
2030 /* BB other socket options to set KEEPALIVE, NODELAY? */
2031 cFYI(1, "Socket created");
2032 server
->ssocket
= socket
;
2033 socket
->sk
->sk_allocation
= GFP_NOFS
;
2034 cifs_reclassify_socket4(socket
);
2037 /* user overrode default port */
2038 if (server
->addr
.sockAddr
.sin_port
) {
2039 rc
= socket
->ops
->connect(socket
, (struct sockaddr
*)
2040 &server
->addr
.sockAddr
,
2041 sizeof(struct sockaddr_in
), 0);
2047 /* save original port so we can retry user specified port
2048 later if fall back ports fail this time */
2049 orig_port
= server
->addr
.sockAddr
.sin_port
;
2051 /* do not retry on the same port we just failed on */
2052 if (server
->addr
.sockAddr
.sin_port
!= htons(CIFS_PORT
)) {
2053 server
->addr
.sockAddr
.sin_port
= htons(CIFS_PORT
);
2054 rc
= socket
->ops
->connect(socket
,
2056 &server
->addr
.sockAddr
,
2057 sizeof(struct sockaddr_in
), 0);
2063 server
->addr
.sockAddr
.sin_port
= htons(RFC1001_PORT
);
2064 rc
= socket
->ops
->connect(socket
, (struct sockaddr
*)
2065 &server
->addr
.sockAddr
,
2066 sizeof(struct sockaddr_in
), 0);
2071 /* give up here - unless we want to retry on different
2072 protocol families some day */
2075 server
->addr
.sockAddr
.sin_port
= orig_port
;
2076 cFYI(1, "Error %d connecting to server via ipv4", rc
);
2077 sock_release(socket
);
2078 server
->ssocket
= NULL
;
2084 * Eventually check for other socket options to change from
2085 * the default. sock_setsockopt not used because it expects
2088 socket
->sk
->sk_rcvtimeo
= 7 * HZ
;
2089 socket
->sk
->sk_sndtimeo
= 5 * HZ
;
2091 /* make the bufsizes depend on wsize/rsize and max requests */
2092 if (server
->noautotune
) {
2093 if (socket
->sk
->sk_sndbuf
< (200 * 1024))
2094 socket
->sk
->sk_sndbuf
= 200 * 1024;
2095 if (socket
->sk
->sk_rcvbuf
< (140 * 1024))
2096 socket
->sk
->sk_rcvbuf
= 140 * 1024;
2099 if (server
->tcp_nodelay
) {
2101 rc
= kernel_setsockopt(socket
, SOL_TCP
, TCP_NODELAY
,
2102 (char *)&val
, sizeof(val
));
2104 cFYI(1, "set TCP_NODELAY socket option error %d", rc
);
2107 cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
2108 socket
->sk
->sk_sndbuf
,
2109 socket
->sk
->sk_rcvbuf
, socket
->sk
->sk_rcvtimeo
);
2111 /* send RFC1001 sessinit */
2112 if (server
->addr
.sockAddr
.sin_port
== htons(RFC1001_PORT
)) {
2113 /* some servers require RFC1001 sessinit before sending
2114 negprot - BB check reconnection in case where second
2115 sessinit is sent but no second negprot */
2116 struct rfc1002_session_packet
*ses_init_buf
;
2117 struct smb_hdr
*smb_buf
;
2118 ses_init_buf
= kzalloc(sizeof(struct rfc1002_session_packet
),
2121 ses_init_buf
->trailer
.session_req
.called_len
= 32;
2122 if (server
->server_RFC1001_name
&&
2123 server
->server_RFC1001_name
[0] != 0)
2124 rfc1002mangle(ses_init_buf
->trailer
.
2125 session_req
.called_name
,
2126 server
->server_RFC1001_name
,
2127 RFC1001_NAME_LEN_WITH_NULL
);
2129 rfc1002mangle(ses_init_buf
->trailer
.
2130 session_req
.called_name
,
2131 DEFAULT_CIFS_CALLED_NAME
,
2132 RFC1001_NAME_LEN_WITH_NULL
);
2134 ses_init_buf
->trailer
.session_req
.calling_len
= 32;
2136 /* calling name ends in null (byte 16) from old smb
2138 if (server
->workstation_RFC1001_name
&&
2139 server
->workstation_RFC1001_name
[0] != 0)
2140 rfc1002mangle(ses_init_buf
->trailer
.
2141 session_req
.calling_name
,
2142 server
->workstation_RFC1001_name
,
2143 RFC1001_NAME_LEN_WITH_NULL
);
2145 rfc1002mangle(ses_init_buf
->trailer
.
2146 session_req
.calling_name
,
2148 RFC1001_NAME_LEN_WITH_NULL
);
2150 ses_init_buf
->trailer
.session_req
.scope1
= 0;
2151 ses_init_buf
->trailer
.session_req
.scope2
= 0;
2152 smb_buf
= (struct smb_hdr
*)ses_init_buf
;
2153 /* sizeof RFC1002_SESSION_REQUEST with no scope */
2154 smb_buf
->smb_buf_length
= 0x81000044;
2155 rc
= smb_send(server
, smb_buf
, 0x44);
2156 kfree(ses_init_buf
);
2157 msleep(1); /* RFC1001 layer in at least one server
2158 requires very short break before negprot
2159 presumably because not expecting negprot
2160 to follow so fast. This is a simple
2161 solution that works without
2162 complicating the code and causes no
2163 significant slowing down on mount
2164 for everyone else */
2166 /* else the negprot may still work without this
2167 even though malloc failed */
2175 ipv6_connect(struct TCP_Server_Info
*server
)
2179 bool connected
= false;
2180 __be16 orig_port
= 0;
2181 struct socket
*socket
= server
->ssocket
;
2183 if (socket
== NULL
) {
2184 rc
= sock_create_kern(PF_INET6
, SOCK_STREAM
,
2185 IPPROTO_TCP
, &socket
);
2187 cERROR(1, "Error %d creating ipv6 socket", rc
);
2192 /* BB other socket options to set KEEPALIVE, NODELAY? */
2193 cFYI(1, "ipv6 Socket created");
2194 server
->ssocket
= socket
;
2195 socket
->sk
->sk_allocation
= GFP_NOFS
;
2196 cifs_reclassify_socket6(socket
);
2199 /* user overrode default port */
2200 if (server
->addr
.sockAddr6
.sin6_port
) {
2201 rc
= socket
->ops
->connect(socket
,
2202 (struct sockaddr
*) &server
->addr
.sockAddr6
,
2203 sizeof(struct sockaddr_in6
), 0);
2209 /* save original port so we can retry user specified port
2210 later if fall back ports fail this time */
2212 orig_port
= server
->addr
.sockAddr6
.sin6_port
;
2213 /* do not retry on the same port we just failed on */
2214 if (server
->addr
.sockAddr6
.sin6_port
!= htons(CIFS_PORT
)) {
2215 server
->addr
.sockAddr6
.sin6_port
= htons(CIFS_PORT
);
2216 rc
= socket
->ops
->connect(socket
, (struct sockaddr
*)
2217 &server
->addr
.sockAddr6
,
2218 sizeof(struct sockaddr_in6
), 0);
2224 server
->addr
.sockAddr6
.sin6_port
= htons(RFC1001_PORT
);
2225 rc
= socket
->ops
->connect(socket
, (struct sockaddr
*)
2226 &server
->addr
.sockAddr6
,
2227 sizeof(struct sockaddr_in6
), 0);
2232 /* give up here - unless we want to retry on different
2233 protocol families some day */
2236 server
->addr
.sockAddr6
.sin6_port
= orig_port
;
2237 cFYI(1, "Error %d connecting to server via ipv6", rc
);
2238 sock_release(socket
);
2239 server
->ssocket
= NULL
;
2244 * Eventually check for other socket options to change from
2245 * the default. sock_setsockopt not used because it expects
2248 socket
->sk
->sk_rcvtimeo
= 7 * HZ
;
2249 socket
->sk
->sk_sndtimeo
= 5 * HZ
;
2251 if (server
->tcp_nodelay
) {
2253 rc
= kernel_setsockopt(socket
, SOL_TCP
, TCP_NODELAY
,
2254 (char *)&val
, sizeof(val
));
2256 cFYI(1, "set TCP_NODELAY socket option error %d", rc
);
2259 server
->ssocket
= socket
;
2264 void reset_cifs_unix_caps(int xid
, struct cifsTconInfo
*tcon
,
2265 struct super_block
*sb
, struct smb_vol
*vol_info
)
2267 /* if we are reconnecting then should we check to see if
2268 * any requested capabilities changed locally e.g. via
2269 * remount but we can not do much about it here
2270 * if they have (even if we could detect it by the following)
2271 * Perhaps we could add a backpointer to array of sb from tcon
2272 * or if we change to make all sb to same share the same
2273 * sb as NFS - then we only have one backpointer to sb.
2274 * What if we wanted to mount the server share twice once with
2275 * and once without posixacls or posix paths? */
2276 __u64 saved_cap
= le64_to_cpu(tcon
->fsUnixInfo
.Capability
);
2278 if (vol_info
&& vol_info
->no_linux_ext
) {
2279 tcon
->fsUnixInfo
.Capability
= 0;
2280 tcon
->unix_ext
= 0; /* Unix Extensions disabled */
2281 cFYI(1, "Linux protocol extensions disabled");
2283 } else if (vol_info
)
2284 tcon
->unix_ext
= 1; /* Unix Extensions supported */
2286 if (tcon
->unix_ext
== 0) {
2287 cFYI(1, "Unix extensions disabled so not set on reconnect");
2291 if (!CIFSSMBQFSUnixInfo(xid
, tcon
)) {
2292 __u64 cap
= le64_to_cpu(tcon
->fsUnixInfo
.Capability
);
2294 /* check for reconnect case in which we do not
2295 want to change the mount behavior if we can avoid it */
2296 if (vol_info
== NULL
) {
2297 /* turn off POSIX ACL and PATHNAMES if not set
2298 originally at mount time */
2299 if ((saved_cap
& CIFS_UNIX_POSIX_ACL_CAP
) == 0)
2300 cap
&= ~CIFS_UNIX_POSIX_ACL_CAP
;
2301 if ((saved_cap
& CIFS_UNIX_POSIX_PATHNAMES_CAP
) == 0) {
2302 if (cap
& CIFS_UNIX_POSIX_PATHNAMES_CAP
)
2303 cERROR(1, "POSIXPATH support change");
2304 cap
&= ~CIFS_UNIX_POSIX_PATHNAMES_CAP
;
2305 } else if ((cap
& CIFS_UNIX_POSIX_PATHNAMES_CAP
) == 0) {
2306 cERROR(1, "possible reconnect error");
2307 cERROR(1, "server disabled POSIX path support");
2311 cap
&= CIFS_UNIX_CAP_MASK
;
2312 if (vol_info
&& vol_info
->no_psx_acl
)
2313 cap
&= ~CIFS_UNIX_POSIX_ACL_CAP
;
2314 else if (CIFS_UNIX_POSIX_ACL_CAP
& cap
) {
2315 cFYI(1, "negotiated posix acl support");
2317 sb
->s_flags
|= MS_POSIXACL
;
2320 if (vol_info
&& vol_info
->posix_paths
== 0)
2321 cap
&= ~CIFS_UNIX_POSIX_PATHNAMES_CAP
;
2322 else if (cap
& CIFS_UNIX_POSIX_PATHNAMES_CAP
) {
2323 cFYI(1, "negotiate posix pathnames");
2325 CIFS_SB(sb
)->mnt_cifs_flags
|=
2326 CIFS_MOUNT_POSIX_PATHS
;
2329 /* We might be setting the path sep back to a different
2330 form if we are reconnecting and the server switched its
2331 posix path capability for this share */
2332 if (sb
&& (CIFS_SB(sb
)->prepathlen
> 0))
2333 CIFS_SB(sb
)->prepath
[0] = CIFS_DIR_SEP(CIFS_SB(sb
));
2335 if (sb
&& (CIFS_SB(sb
)->rsize
> 127 * 1024)) {
2336 if ((cap
& CIFS_UNIX_LARGE_READ_CAP
) == 0) {
2337 CIFS_SB(sb
)->rsize
= 127 * 1024;
2338 cFYI(DBG2
, "larger reads not supported by srv");
2343 cFYI(1, "Negotiate caps 0x%x", (int)cap
);
2344 #ifdef CONFIG_CIFS_DEBUG2
2345 if (cap
& CIFS_UNIX_FCNTL_CAP
)
2346 cFYI(1, "FCNTL cap");
2347 if (cap
& CIFS_UNIX_EXTATTR_CAP
)
2348 cFYI(1, "EXTATTR cap");
2349 if (cap
& CIFS_UNIX_POSIX_PATHNAMES_CAP
)
2350 cFYI(1, "POSIX path cap");
2351 if (cap
& CIFS_UNIX_XATTR_CAP
)
2352 cFYI(1, "XATTR cap");
2353 if (cap
& CIFS_UNIX_POSIX_ACL_CAP
)
2354 cFYI(1, "POSIX ACL cap");
2355 if (cap
& CIFS_UNIX_LARGE_READ_CAP
)
2356 cFYI(1, "very large read cap");
2357 if (cap
& CIFS_UNIX_LARGE_WRITE_CAP
)
2358 cFYI(1, "very large write cap");
2359 #endif /* CIFS_DEBUG2 */
2360 if (CIFSSMBSetFSUnixInfo(xid
, tcon
, cap
)) {
2361 if (vol_info
== NULL
) {
2362 cFYI(1, "resetting capabilities failed");
2364 cERROR(1, "Negotiating Unix capabilities "
2365 "with the server failed. Consider "
2366 "mounting with the Unix Extensions\n"
2367 "disabled, if problems are found, "
2368 "by specifying the nounix mount "
2376 convert_delimiter(char *path
, char delim
)
2389 for (i
= 0; path
[i
] != '\0'; i
++) {
2390 if (path
[i
] == old_delim
)
2395 static void setup_cifs_sb(struct smb_vol
*pvolume_info
,
2396 struct cifs_sb_info
*cifs_sb
)
2398 if (pvolume_info
->rsize
> CIFSMaxBufSize
) {
2399 cERROR(1, "rsize %d too large, using MaxBufSize",
2400 pvolume_info
->rsize
);
2401 cifs_sb
->rsize
= CIFSMaxBufSize
;
2402 } else if ((pvolume_info
->rsize
) &&
2403 (pvolume_info
->rsize
<= CIFSMaxBufSize
))
2404 cifs_sb
->rsize
= pvolume_info
->rsize
;
2406 cifs_sb
->rsize
= CIFSMaxBufSize
;
2408 if (pvolume_info
->wsize
> PAGEVEC_SIZE
* PAGE_CACHE_SIZE
) {
2409 cERROR(1, "wsize %d too large, using 4096 instead",
2410 pvolume_info
->wsize
);
2411 cifs_sb
->wsize
= 4096;
2412 } else if (pvolume_info
->wsize
)
2413 cifs_sb
->wsize
= pvolume_info
->wsize
;
2415 cifs_sb
->wsize
= min_t(const int,
2416 PAGEVEC_SIZE
* PAGE_CACHE_SIZE
,
2418 /* old default of CIFSMaxBufSize was too small now
2419 that SMB Write2 can send multiple pages in kvec.
2420 RFC1001 does not describe what happens when frame
2421 bigger than 128K is sent so use that as max in
2422 conjunction with 52K kvec constraint on arch with 4K
2425 if (cifs_sb
->rsize
< 2048) {
2426 cifs_sb
->rsize
= 2048;
2427 /* Windows ME may prefer this */
2428 cFYI(1, "readsize set to minimum: 2048");
2430 /* calculate prepath */
2431 cifs_sb
->prepath
= pvolume_info
->prepath
;
2432 if (cifs_sb
->prepath
) {
2433 cifs_sb
->prepathlen
= strlen(cifs_sb
->prepath
);
2434 /* we can not convert the / to \ in the path
2435 separators in the prefixpath yet because we do not
2436 know (until reset_cifs_unix_caps is called later)
2437 whether POSIX PATH CAP is available. We normalize
2438 the / to \ after reset_cifs_unix_caps is called */
2439 pvolume_info
->prepath
= NULL
;
2441 cifs_sb
->prepathlen
= 0;
2442 cifs_sb
->mnt_uid
= pvolume_info
->linux_uid
;
2443 cifs_sb
->mnt_gid
= pvolume_info
->linux_gid
;
2444 cifs_sb
->mnt_file_mode
= pvolume_info
->file_mode
;
2445 cifs_sb
->mnt_dir_mode
= pvolume_info
->dir_mode
;
2446 cFYI(1, "file mode: 0x%x dir mode: 0x%x",
2447 cifs_sb
->mnt_file_mode
, cifs_sb
->mnt_dir_mode
);
2449 if (pvolume_info
->noperm
)
2450 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NO_PERM
;
2451 if (pvolume_info
->setuids
)
2452 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_SET_UID
;
2453 if (pvolume_info
->server_ino
)
2454 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_SERVER_INUM
;
2455 if (pvolume_info
->remap
)
2456 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_MAP_SPECIAL_CHR
;
2457 if (pvolume_info
->no_xattr
)
2458 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NO_XATTR
;
2459 if (pvolume_info
->sfu_emul
)
2460 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_UNX_EMUL
;
2461 if (pvolume_info
->nobrl
)
2462 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NO_BRL
;
2463 if (pvolume_info
->nostrictsync
)
2464 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NOSSYNC
;
2465 if (pvolume_info
->mand_lock
)
2466 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NOPOSIXBRL
;
2467 if (pvolume_info
->cifs_acl
)
2468 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_CIFS_ACL
;
2469 if (pvolume_info
->override_uid
)
2470 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_OVERR_UID
;
2471 if (pvolume_info
->override_gid
)
2472 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_OVERR_GID
;
2473 if (pvolume_info
->dynperm
)
2474 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_DYNPERM
;
2475 if (pvolume_info
->fsc
)
2476 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_FSCACHE
;
2477 if (pvolume_info
->direct_io
) {
2478 cFYI(1, "mounting share using direct i/o");
2479 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_DIRECT_IO
;
2482 if ((pvolume_info
->cifs_acl
) && (pvolume_info
->dynperm
))
2483 cERROR(1, "mount option dynperm ignored if cifsacl "
2484 "mount option supported");
2488 is_path_accessible(int xid
, struct cifsTconInfo
*tcon
,
2489 struct cifs_sb_info
*cifs_sb
, const char *full_path
)
2492 FILE_ALL_INFO
*pfile_info
;
2494 pfile_info
= kmalloc(sizeof(FILE_ALL_INFO
), GFP_KERNEL
);
2495 if (pfile_info
== NULL
)
2498 rc
= CIFSSMBQPathInfo(xid
, tcon
, full_path
, pfile_info
,
2499 0 /* not legacy */, cifs_sb
->local_nls
,
2500 cifs_sb
->mnt_cifs_flags
&
2501 CIFS_MOUNT_MAP_SPECIAL_CHR
);
2507 cleanup_volume_info(struct smb_vol
**pvolume_info
)
2509 struct smb_vol
*volume_info
;
2511 if (!pvolume_info
|| !*pvolume_info
)
2514 volume_info
= *pvolume_info
;
2515 kzfree(volume_info
->password
);
2516 kfree(volume_info
->UNC
);
2517 kfree(volume_info
->prepath
);
2519 *pvolume_info
= NULL
;
2523 #ifdef CONFIG_CIFS_DFS_UPCALL
2524 /* build_path_to_root returns full path to root when
2525 * we do not have an exiting connection (tcon) */
2527 build_unc_path_to_root(const struct smb_vol
*volume_info
,
2528 const struct cifs_sb_info
*cifs_sb
)
2532 int unc_len
= strnlen(volume_info
->UNC
, MAX_TREE_SIZE
+ 1);
2533 full_path
= kmalloc(unc_len
+ cifs_sb
->prepathlen
+ 1, GFP_KERNEL
);
2534 if (full_path
== NULL
)
2535 return ERR_PTR(-ENOMEM
);
2537 strncpy(full_path
, volume_info
->UNC
, unc_len
);
2538 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_POSIX_PATHS
) {
2540 for (i
= 0; i
< unc_len
; i
++) {
2541 if (full_path
[i
] == '\\')
2546 if (cifs_sb
->prepathlen
)
2547 strncpy(full_path
+ unc_len
, cifs_sb
->prepath
,
2548 cifs_sb
->prepathlen
);
2550 full_path
[unc_len
+ cifs_sb
->prepathlen
] = 0; /* add trailing null */
2556 cifs_mount(struct super_block
*sb
, struct cifs_sb_info
*cifs_sb
,
2557 char *mount_data_global
, const char *devname
)
2561 struct smb_vol
*volume_info
;
2562 struct cifsSesInfo
*pSesInfo
;
2563 struct cifsTconInfo
*tcon
;
2564 struct TCP_Server_Info
*srvTcp
;
2566 char *mount_data
= mount_data_global
;
2567 #ifdef CONFIG_CIFS_DFS_UPCALL
2568 struct dfs_info3_param
*referrals
= NULL
;
2569 unsigned int num_referrals
= 0;
2570 int referral_walks_count
= 0;
2581 volume_info
= kzalloc(sizeof(struct smb_vol
), GFP_KERNEL
);
2587 if (cifs_parse_mount_options(mount_data
, devname
, volume_info
)) {
2592 if (volume_info
->nullauth
) {
2593 cFYI(1, "null user");
2594 volume_info
->username
= "";
2595 } else if (volume_info
->username
) {
2596 /* BB fixme parse for domain name here */
2597 cFYI(1, "Username: %s", volume_info
->username
);
2599 cifserror("No username specified");
2600 /* In userspace mount helper we can get user name from alternate
2601 locations such as env variables and files on disk */
2606 /* this is needed for ASCII cp to Unicode converts */
2607 if (volume_info
->iocharset
== NULL
) {
2608 /* load_nls_default cannot return null */
2609 volume_info
->local_nls
= load_nls_default();
2611 volume_info
->local_nls
= load_nls(volume_info
->iocharset
);
2612 if (volume_info
->local_nls
== NULL
) {
2613 cERROR(1, "CIFS mount error: iocharset %s not found",
2614 volume_info
->iocharset
);
2619 cifs_sb
->local_nls
= volume_info
->local_nls
;
2621 /* get a reference to a tcp session */
2622 srvTcp
= cifs_get_tcp_session(volume_info
);
2623 if (IS_ERR(srvTcp
)) {
2624 rc
= PTR_ERR(srvTcp
);
2628 /* get a reference to a SMB session */
2629 pSesInfo
= cifs_get_smb_ses(srvTcp
, volume_info
);
2630 if (IS_ERR(pSesInfo
)) {
2631 rc
= PTR_ERR(pSesInfo
);
2633 goto mount_fail_check
;
2636 setup_cifs_sb(volume_info
, cifs_sb
);
2637 if (pSesInfo
->capabilities
& CAP_LARGE_FILES
)
2638 sb
->s_maxbytes
= MAX_LFS_FILESIZE
;
2640 sb
->s_maxbytes
= MAX_NON_LFS
;
2642 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
2643 sb
->s_time_gran
= 100;
2645 /* search for existing tcon to this server share */
2646 tcon
= cifs_get_tcon(pSesInfo
, volume_info
);
2650 goto remote_path_check
;
2653 cifs_sb
->tcon
= tcon
;
2655 /* do not care if following two calls succeed - informational */
2657 CIFSSMBQFSDeviceInfo(xid
, tcon
);
2658 CIFSSMBQFSAttributeInfo(xid
, tcon
);
2661 /* tell server which Unix caps we support */
2662 if (tcon
->ses
->capabilities
& CAP_UNIX
)
2663 /* reset of caps checks mount to see if unix extensions
2664 disabled for just this mount */
2665 reset_cifs_unix_caps(xid
, tcon
, sb
, volume_info
);
2667 tcon
->unix_ext
= 0; /* server does not support them */
2669 /* convert forward to back slashes in prepath here if needed */
2670 if ((cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_POSIX_PATHS
) == 0)
2671 convert_delimiter(cifs_sb
->prepath
, CIFS_DIR_SEP(cifs_sb
));
2673 if ((tcon
->unix_ext
== 0) && (cifs_sb
->rsize
> (1024 * 127))) {
2674 cifs_sb
->rsize
= 1024 * 127;
2675 cFYI(DBG2
, "no very large read support, rsize now 127K");
2677 if (!(tcon
->ses
->capabilities
& CAP_LARGE_WRITE_X
))
2678 cifs_sb
->wsize
= min(cifs_sb
->wsize
,
2679 (tcon
->ses
->server
->maxBuf
- MAX_CIFS_HDR_SIZE
));
2680 if (!(tcon
->ses
->capabilities
& CAP_LARGE_READ_X
))
2681 cifs_sb
->rsize
= min(cifs_sb
->rsize
,
2682 (tcon
->ses
->server
->maxBuf
- MAX_CIFS_HDR_SIZE
));
2685 /* check if a whole path (including prepath) is not remote */
2686 if (!rc
&& cifs_sb
->prepathlen
&& tcon
) {
2687 /* build_path_to_root works only when we have a valid tcon */
2688 full_path
= cifs_build_path_to_root(cifs_sb
);
2689 if (full_path
== NULL
) {
2691 goto mount_fail_check
;
2693 rc
= is_path_accessible(xid
, tcon
, cifs_sb
, full_path
);
2694 if (rc
!= -EREMOTE
) {
2696 goto mount_fail_check
;
2701 /* get referral if needed */
2702 if (rc
== -EREMOTE
) {
2703 #ifdef CONFIG_CIFS_DFS_UPCALL
2704 if (referral_walks_count
> MAX_NESTED_LINKS
) {
2706 * BB: when we implement proper loop detection,
2707 * we will remove this check. But now we need it
2708 * to prevent an indefinite loop if 'DFS tree' is
2709 * misconfigured (i.e. has loops).
2712 goto mount_fail_check
;
2714 /* convert forward to back slashes in prepath here if needed */
2715 if ((cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_POSIX_PATHS
) == 0)
2716 convert_delimiter(cifs_sb
->prepath
,
2717 CIFS_DIR_SEP(cifs_sb
));
2718 full_path
= build_unc_path_to_root(volume_info
, cifs_sb
);
2719 if (IS_ERR(full_path
)) {
2720 rc
= PTR_ERR(full_path
);
2721 goto mount_fail_check
;
2724 cFYI(1, "Getting referral for: %s", full_path
);
2725 rc
= get_dfs_path(xid
, pSesInfo
, full_path
+ 1,
2726 cifs_sb
->local_nls
, &num_referrals
, &referrals
,
2727 cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
);
2728 if (!rc
&& num_referrals
> 0) {
2729 char *fake_devname
= NULL
;
2731 if (mount_data
!= mount_data_global
)
2734 mount_data
= cifs_compose_mount_options(
2735 cifs_sb
->mountdata
, full_path
+ 1,
2736 referrals
, &fake_devname
);
2738 free_dfs_info_array(referrals
, num_referrals
);
2739 kfree(fake_devname
);
2742 if (IS_ERR(mount_data
)) {
2743 rc
= PTR_ERR(mount_data
);
2745 goto mount_fail_check
;
2749 cifs_put_tcon(tcon
);
2751 cifs_put_smb_ses(pSesInfo
);
2753 cleanup_volume_info(&volume_info
);
2754 referral_walks_count
++;
2756 goto try_mount_again
;
2758 #else /* No DFS support, return error on mount */
2764 /* on error free sesinfo and tcon struct if needed */
2766 if (mount_data
!= mount_data_global
)
2768 /* If find_unc succeeded then rc == 0 so we can not end */
2769 /* up accidently freeing someone elses tcon struct */
2771 cifs_put_tcon(tcon
);
2773 cifs_put_smb_ses(pSesInfo
);
2775 cifs_put_tcp_session(srvTcp
);
2779 /* volume_info->password is freed above when existing session found
2780 (in which case it is not needed anymore) but when new sesion is created
2781 the password ptr is put in the new session structure (in which case the
2782 password will be freed at unmount time) */
2784 /* zero out password before freeing */
2785 cleanup_volume_info(&volume_info
);
2791 CIFSTCon(unsigned int xid
, struct cifsSesInfo
*ses
,
2792 const char *tree
, struct cifsTconInfo
*tcon
,
2793 const struct nls_table
*nls_codepage
)
2795 struct smb_hdr
*smb_buffer
;
2796 struct smb_hdr
*smb_buffer_response
;
2799 unsigned char *bcc_ptr
;
2801 int length
, bytes_left
;
2807 smb_buffer
= cifs_buf_get();
2808 if (smb_buffer
== NULL
)
2811 smb_buffer_response
= smb_buffer
;
2813 header_assemble(smb_buffer
, SMB_COM_TREE_CONNECT_ANDX
,
2814 NULL
/*no tid */ , 4 /*wct */ );
2816 smb_buffer
->Mid
= GetNextMid(ses
->server
);
2817 smb_buffer
->Uid
= ses
->Suid
;
2818 pSMB
= (TCONX_REQ
*) smb_buffer
;
2819 pSMBr
= (TCONX_RSP
*) smb_buffer_response
;
2821 pSMB
->AndXCommand
= 0xFF;
2822 pSMB
->Flags
= cpu_to_le16(TCON_EXTENDED_SECINFO
);
2823 bcc_ptr
= &pSMB
->Password
[0];
2824 if ((ses
->server
->secMode
) & SECMODE_USER
) {
2825 pSMB
->PasswordLength
= cpu_to_le16(1); /* minimum */
2826 *bcc_ptr
= 0; /* password is null byte */
2827 bcc_ptr
++; /* skip password */
2828 /* already aligned so no need to do it below */
2830 pSMB
->PasswordLength
= cpu_to_le16(CIFS_SESS_KEY_SIZE
);
2831 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
2832 specified as required (when that support is added to
2833 the vfs in the future) as only NTLM or the much
2834 weaker LANMAN (which we do not send by default) is accepted
2835 by Samba (not sure whether other servers allow
2836 NTLMv2 password here) */
2837 #ifdef CONFIG_CIFS_WEAK_PW_HASH
2838 if ((global_secflags
& CIFSSEC_MAY_LANMAN
) &&
2839 (ses
->server
->secType
== LANMAN
))
2840 calc_lanman_hash(tcon
->password
, ses
->server
->cryptKey
,
2841 ses
->server
->secMode
&
2842 SECMODE_PW_ENCRYPT
? true : false,
2845 #endif /* CIFS_WEAK_PW_HASH */
2846 SMBNTencrypt(tcon
->password
, ses
->server
->cryptKey
,
2849 bcc_ptr
+= CIFS_SESS_KEY_SIZE
;
2850 if (ses
->capabilities
& CAP_UNICODE
) {
2851 /* must align unicode strings */
2852 *bcc_ptr
= 0; /* null byte password */
2857 if (ses
->server
->secMode
&
2858 (SECMODE_SIGN_REQUIRED
| SECMODE_SIGN_ENABLED
))
2859 smb_buffer
->Flags2
|= SMBFLG2_SECURITY_SIGNATURE
;
2861 if (ses
->capabilities
& CAP_STATUS32
) {
2862 smb_buffer
->Flags2
|= SMBFLG2_ERR_STATUS
;
2864 if (ses
->capabilities
& CAP_DFS
) {
2865 smb_buffer
->Flags2
|= SMBFLG2_DFS
;
2867 if (ses
->capabilities
& CAP_UNICODE
) {
2868 smb_buffer
->Flags2
|= SMBFLG2_UNICODE
;
2870 cifs_strtoUCS((__le16
*) bcc_ptr
, tree
,
2871 6 /* max utf8 char length in bytes */ *
2872 (/* server len*/ + 256 /* share len */), nls_codepage
);
2873 bcc_ptr
+= 2 * length
; /* convert num 16 bit words to bytes */
2874 bcc_ptr
+= 2; /* skip trailing null */
2875 } else { /* ASCII */
2876 strcpy(bcc_ptr
, tree
);
2877 bcc_ptr
+= strlen(tree
) + 1;
2879 strcpy(bcc_ptr
, "?????");
2880 bcc_ptr
+= strlen("?????");
2882 count
= bcc_ptr
- &pSMB
->Password
[0];
2883 pSMB
->hdr
.smb_buf_length
+= count
;
2884 pSMB
->ByteCount
= cpu_to_le16(count
);
2886 rc
= SendReceive(xid
, ses
, smb_buffer
, smb_buffer_response
, &length
,
2889 /* above now done in SendReceive */
2890 if ((rc
== 0) && (tcon
!= NULL
)) {
2893 tcon
->tidStatus
= CifsGood
;
2894 tcon
->need_reconnect
= false;
2895 tcon
->tid
= smb_buffer_response
->Tid
;
2896 bcc_ptr
= pByteArea(smb_buffer_response
);
2897 bytes_left
= BCC(smb_buffer_response
);
2898 length
= strnlen(bcc_ptr
, bytes_left
- 2);
2899 if (smb_buffer
->Flags2
& SMBFLG2_UNICODE
)
2905 /* skip service field (NB: this field is always ASCII) */
2907 if ((bcc_ptr
[0] == 'I') && (bcc_ptr
[1] == 'P') &&
2908 (bcc_ptr
[2] == 'C')) {
2909 cFYI(1, "IPC connection");
2912 } else if (length
== 2) {
2913 if ((bcc_ptr
[0] == 'A') && (bcc_ptr
[1] == ':')) {
2914 /* the most common case */
2915 cFYI(1, "disk share connection");
2918 bcc_ptr
+= length
+ 1;
2919 bytes_left
-= (length
+ 1);
2920 strncpy(tcon
->treeName
, tree
, MAX_TREE_SIZE
);
2922 /* mostly informational -- no need to fail on error here */
2923 kfree(tcon
->nativeFileSystem
);
2924 tcon
->nativeFileSystem
= cifs_strndup_from_ucs(bcc_ptr
,
2925 bytes_left
, is_unicode
,
2928 cFYI(1, "nativeFileSystem=%s", tcon
->nativeFileSystem
);
2930 if ((smb_buffer_response
->WordCount
== 3) ||
2931 (smb_buffer_response
->WordCount
== 7))
2932 /* field is in same location */
2933 tcon
->Flags
= le16_to_cpu(pSMBr
->OptionalSupport
);
2936 cFYI(1, "Tcon flags: 0x%x ", tcon
->Flags
);
2937 } else if ((rc
== 0) && tcon
== NULL
) {
2938 /* all we need to save for IPC$ connection */
2939 ses
->ipc_tid
= smb_buffer_response
->Tid
;
2942 cifs_buf_release(smb_buffer
);
2947 cifs_umount(struct super_block
*sb
, struct cifs_sb_info
*cifs_sb
)
2953 cifs_put_tcon(cifs_sb
->tcon
);
2955 cifs_sb
->tcon
= NULL
;
2956 tmp
= cifs_sb
->prepath
;
2957 cifs_sb
->prepathlen
= 0;
2958 cifs_sb
->prepath
= NULL
;
2964 int cifs_negotiate_protocol(unsigned int xid
, struct cifsSesInfo
*ses
)
2967 struct TCP_Server_Info
*server
= ses
->server
;
2969 /* only send once per connect */
2970 if (server
->maxBuf
!= 0)
2973 rc
= CIFSSMBNegotiate(xid
, ses
);
2974 if (rc
== -EAGAIN
) {
2975 /* retry only once on 1st time connection */
2976 rc
= CIFSSMBNegotiate(xid
, ses
);
2981 spin_lock(&GlobalMid_Lock
);
2982 if (server
->tcpStatus
!= CifsExiting
)
2983 server
->tcpStatus
= CifsGood
;
2986 spin_unlock(&GlobalMid_Lock
);
2994 int cifs_setup_session(unsigned int xid
, struct cifsSesInfo
*ses
,
2995 struct nls_table
*nls_info
)
2998 struct TCP_Server_Info
*server
= ses
->server
;
3001 ses
->capabilities
= server
->capabilities
;
3002 if (linuxExtEnabled
== 0)
3003 ses
->capabilities
&= (~CAP_UNIX
);
3005 cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3006 server
->secMode
, server
->capabilities
, server
->timeAdj
);
3008 rc
= CIFS_SessSetup(xid
, ses
, nls_info
);
3010 cERROR(1, "Send error in SessSetup = %d", rc
);
3012 cFYI(1, "CIFS Session Established successfully");
3013 spin_lock(&GlobalMid_Lock
);
3014 ses
->status
= CifsGood
;
3015 ses
->need_reconnect
= false;
3016 spin_unlock(&GlobalMid_Lock
);