4 * Copyright (C) International Business Machines Corp., 2002,2011
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>
40 #include <linux/module.h>
41 #include <keys/user-type.h>
43 #include <linux/parser.h>
47 #include "cifsproto.h"
48 #include "cifs_unicode.h"
49 #include "cifs_debug.h"
50 #include "cifs_fs_sb.h"
53 #include "rfc1002pdu.h"
57 #define RFC1001_PORT 139
59 extern mempool_t
*cifs_req_poolp
;
61 /* FIXME: should these be tunable? */
62 #define TLINK_ERROR_EXPIRE (1 * HZ)
63 #define TLINK_IDLE_EXPIRE (600 * HZ)
67 /* Mount options that take no arguments */
68 Opt_user_xattr
, Opt_nouser_xattr
,
69 Opt_forceuid
, Opt_noforceuid
,
70 Opt_forcegid
, Opt_noforcegid
,
71 Opt_noblocksend
, Opt_noautotune
,
72 Opt_hard
, Opt_soft
, Opt_perm
, Opt_noperm
,
73 Opt_mapchars
, Opt_nomapchars
, Opt_sfu
,
74 Opt_nosfu
, Opt_nodfs
, Opt_posixpaths
,
75 Opt_noposixpaths
, Opt_nounix
,
78 Opt_forcemandatorylock
, Opt_setuids
,
79 Opt_nosetuids
, Opt_dynperm
, Opt_nodynperm
,
80 Opt_nohard
, Opt_nosoft
,
82 Opt_nostrictsync
, Opt_strictsync
,
83 Opt_serverino
, Opt_noserverino
,
84 Opt_rwpidforward
, Opt_cifsacl
, Opt_nocifsacl
,
85 Opt_acl
, Opt_noacl
, Opt_locallease
,
86 Opt_sign
, Opt_seal
, Opt_noac
,
87 Opt_fsc
, Opt_mfsymlinks
,
88 Opt_multiuser
, Opt_sloppy
,
90 /* Mount options which take numeric value */
91 Opt_backupuid
, Opt_backupgid
, Opt_uid
,
92 Opt_cruid
, Opt_gid
, Opt_file_mode
,
93 Opt_dirmode
, Opt_port
,
94 Opt_rsize
, Opt_wsize
, Opt_actimeo
,
96 /* Mount options which take string value */
97 Opt_user
, Opt_pass
, Opt_ip
,
98 Opt_domain
, Opt_srcaddr
, Opt_iocharset
,
99 Opt_netbiosname
, Opt_servern
,
100 Opt_ver
, Opt_vers
, Opt_sec
, Opt_cache
,
102 /* Mount options to be ignored */
105 /* Options which could be blank */
113 static const match_table_t cifs_mount_option_tokens
= {
115 { Opt_user_xattr
, "user_xattr" },
116 { Opt_nouser_xattr
, "nouser_xattr" },
117 { Opt_forceuid
, "forceuid" },
118 { Opt_noforceuid
, "noforceuid" },
119 { Opt_forcegid
, "forcegid" },
120 { Opt_noforcegid
, "noforcegid" },
121 { Opt_noblocksend
, "noblocksend" },
122 { Opt_noautotune
, "noautotune" },
123 { Opt_hard
, "hard" },
124 { Opt_soft
, "soft" },
125 { Opt_perm
, "perm" },
126 { Opt_noperm
, "noperm" },
127 { Opt_mapchars
, "mapchars" },
128 { Opt_nomapchars
, "nomapchars" },
130 { Opt_nosfu
, "nosfu" },
131 { Opt_nodfs
, "nodfs" },
132 { Opt_posixpaths
, "posixpaths" },
133 { Opt_noposixpaths
, "noposixpaths" },
134 { Opt_nounix
, "nounix" },
135 { Opt_nounix
, "nolinux" },
136 { Opt_nocase
, "nocase" },
137 { Opt_nocase
, "ignorecase" },
139 { Opt_nobrl
, "nobrl" },
140 { Opt_nobrl
, "nolock" },
141 { Opt_forcemandatorylock
, "forcemandatorylock" },
142 { Opt_forcemandatorylock
, "forcemand" },
143 { Opt_setuids
, "setuids" },
144 { Opt_nosetuids
, "nosetuids" },
145 { Opt_dynperm
, "dynperm" },
146 { Opt_nodynperm
, "nodynperm" },
147 { Opt_nohard
, "nohard" },
148 { Opt_nosoft
, "nosoft" },
149 { Opt_nointr
, "nointr" },
150 { Opt_intr
, "intr" },
151 { Opt_nostrictsync
, "nostrictsync" },
152 { Opt_strictsync
, "strictsync" },
153 { Opt_serverino
, "serverino" },
154 { Opt_noserverino
, "noserverino" },
155 { Opt_rwpidforward
, "rwpidforward" },
156 { Opt_cifsacl
, "cifsacl" },
157 { Opt_nocifsacl
, "nocifsacl" },
159 { Opt_noacl
, "noacl" },
160 { Opt_locallease
, "locallease" },
161 { Opt_sign
, "sign" },
162 { Opt_seal
, "seal" },
163 { Opt_noac
, "noac" },
165 { Opt_mfsymlinks
, "mfsymlinks" },
166 { Opt_multiuser
, "multiuser" },
167 { Opt_sloppy
, "sloppy" },
169 { Opt_backupuid
, "backupuid=%s" },
170 { Opt_backupgid
, "backupgid=%s" },
171 { Opt_uid
, "uid=%s" },
172 { Opt_cruid
, "cruid=%s" },
173 { Opt_gid
, "gid=%s" },
174 { Opt_file_mode
, "file_mode=%s" },
175 { Opt_dirmode
, "dirmode=%s" },
176 { Opt_dirmode
, "dir_mode=%s" },
177 { Opt_port
, "port=%s" },
178 { Opt_rsize
, "rsize=%s" },
179 { Opt_wsize
, "wsize=%s" },
180 { Opt_actimeo
, "actimeo=%s" },
182 { Opt_blank_user
, "user=" },
183 { Opt_blank_user
, "username=" },
184 { Opt_user
, "user=%s" },
185 { Opt_user
, "username=%s" },
186 { Opt_blank_pass
, "pass=" },
187 { Opt_blank_pass
, "password=" },
188 { Opt_pass
, "pass=%s" },
189 { Opt_pass
, "password=%s" },
190 { Opt_blank_ip
, "ip=" },
191 { Opt_blank_ip
, "addr=" },
193 { Opt_ip
, "addr=%s" },
194 { Opt_ignore
, "unc=%s" },
195 { Opt_ignore
, "target=%s" },
196 { Opt_ignore
, "path=%s" },
197 { Opt_domain
, "dom=%s" },
198 { Opt_domain
, "domain=%s" },
199 { Opt_domain
, "workgroup=%s" },
200 { Opt_srcaddr
, "srcaddr=%s" },
201 { Opt_ignore
, "prefixpath=%s" },
202 { Opt_iocharset
, "iocharset=%s" },
203 { Opt_netbiosname
, "netbiosname=%s" },
204 { Opt_servern
, "servern=%s" },
205 { Opt_ver
, "ver=%s" },
206 { Opt_vers
, "vers=%s" },
207 { Opt_sec
, "sec=%s" },
208 { Opt_cache
, "cache=%s" },
210 { Opt_ignore
, "cred" },
211 { Opt_ignore
, "credentials" },
212 { Opt_ignore
, "cred=%s" },
213 { Opt_ignore
, "credentials=%s" },
214 { Opt_ignore
, "guest" },
215 { Opt_ignore
, "rw" },
216 { Opt_ignore
, "ro" },
217 { Opt_ignore
, "suid" },
218 { Opt_ignore
, "nosuid" },
219 { Opt_ignore
, "exec" },
220 { Opt_ignore
, "noexec" },
221 { Opt_ignore
, "nodev" },
222 { Opt_ignore
, "noauto" },
223 { Opt_ignore
, "dev" },
224 { Opt_ignore
, "mand" },
225 { Opt_ignore
, "nomand" },
226 { Opt_ignore
, "_netdev" },
232 Opt_sec_krb5
, Opt_sec_krb5i
, Opt_sec_krb5p
,
233 Opt_sec_ntlmsspi
, Opt_sec_ntlmssp
,
234 Opt_ntlm
, Opt_sec_ntlmi
, Opt_sec_ntlmv2
,
235 Opt_sec_ntlmv2i
, Opt_sec_lanman
,
241 static const match_table_t cifs_secflavor_tokens
= {
242 { Opt_sec_krb5
, "krb5" },
243 { Opt_sec_krb5i
, "krb5i" },
244 { Opt_sec_krb5p
, "krb5p" },
245 { Opt_sec_ntlmsspi
, "ntlmsspi" },
246 { Opt_sec_ntlmssp
, "ntlmssp" },
247 { Opt_ntlm
, "ntlm" },
248 { Opt_sec_ntlmi
, "ntlmi" },
249 { Opt_sec_ntlmv2
, "nontlm" },
250 { Opt_sec_ntlmv2
, "ntlmv2" },
251 { Opt_sec_ntlmv2i
, "ntlmv2i" },
252 { Opt_sec_lanman
, "lanman" },
253 { Opt_sec_none
, "none" },
255 { Opt_sec_err
, NULL
}
266 static const match_table_t cifs_cacheflavor_tokens
= {
267 { Opt_cache_loose
, "loose" },
268 { Opt_cache_strict
, "strict" },
269 { Opt_cache_none
, "none" },
270 { Opt_cache_err
, NULL
}
273 static const match_table_t cifs_smb_version_tokens
= {
274 { Smb_1
, SMB1_VERSION_STRING
},
275 { Smb_20
, SMB20_VERSION_STRING
},
276 { Smb_21
, SMB21_VERSION_STRING
},
277 { Smb_30
, SMB30_VERSION_STRING
},
280 static int ip_connect(struct TCP_Server_Info
*server
);
281 static int generic_ip_connect(struct TCP_Server_Info
*server
);
282 static void tlink_rb_insert(struct rb_root
*root
, struct tcon_link
*new_tlink
);
283 static void cifs_prune_tlinks(struct work_struct
*work
);
284 static int cifs_setup_volume_info(struct smb_vol
*volume_info
, char *mount_data
,
285 const char *devname
);
288 * cifs tcp session reconnection
290 * mark tcp session as reconnecting so temporarily locked
291 * mark all smb sessions as reconnecting for tcp session
292 * reconnect tcp session
293 * wake up waiters on reconnection? - (not needed currently)
296 cifs_reconnect(struct TCP_Server_Info
*server
)
299 struct list_head
*tmp
, *tmp2
;
300 struct cifs_ses
*ses
;
301 struct cifs_tcon
*tcon
;
302 struct mid_q_entry
*mid_entry
;
303 struct list_head retry_list
;
305 spin_lock(&GlobalMid_Lock
);
306 if (server
->tcpStatus
== CifsExiting
) {
307 /* the demux thread will exit normally
308 next time through the loop */
309 spin_unlock(&GlobalMid_Lock
);
312 server
->tcpStatus
= CifsNeedReconnect
;
313 spin_unlock(&GlobalMid_Lock
);
315 #ifdef CONFIG_CIFS_SMB2
316 server
->max_read
= 0;
319 cifs_dbg(FYI
, "Reconnecting tcp session\n");
321 /* before reconnecting the tcp session, mark the smb session (uid)
322 and the tid bad so they are not used until reconnected */
323 cifs_dbg(FYI
, "%s: marking sessions and tcons for reconnect\n",
325 spin_lock(&cifs_tcp_ses_lock
);
326 list_for_each(tmp
, &server
->smb_ses_list
) {
327 ses
= list_entry(tmp
, struct cifs_ses
, smb_ses_list
);
328 ses
->need_reconnect
= true;
330 list_for_each(tmp2
, &ses
->tcon_list
) {
331 tcon
= list_entry(tmp2
, struct cifs_tcon
, tcon_list
);
332 tcon
->need_reconnect
= true;
335 spin_unlock(&cifs_tcp_ses_lock
);
337 /* do not want to be sending data on a socket we are freeing */
338 cifs_dbg(FYI
, "%s: tearing down socket\n", __func__
);
339 mutex_lock(&server
->srv_mutex
);
340 if (server
->ssocket
) {
341 cifs_dbg(FYI
, "State: 0x%x Flags: 0x%lx\n",
342 server
->ssocket
->state
, server
->ssocket
->flags
);
343 kernel_sock_shutdown(server
->ssocket
, SHUT_WR
);
344 cifs_dbg(FYI
, "Post shutdown state: 0x%x Flags: 0x%lx\n",
345 server
->ssocket
->state
, server
->ssocket
->flags
);
346 sock_release(server
->ssocket
);
347 server
->ssocket
= NULL
;
349 server
->sequence_number
= 0;
350 server
->session_estab
= false;
351 kfree(server
->session_key
.response
);
352 server
->session_key
.response
= NULL
;
353 server
->session_key
.len
= 0;
354 server
->lstrp
= jiffies
;
355 mutex_unlock(&server
->srv_mutex
);
357 /* mark submitted MIDs for retry and issue callback */
358 INIT_LIST_HEAD(&retry_list
);
359 cifs_dbg(FYI
, "%s: moving mids to private list\n", __func__
);
360 spin_lock(&GlobalMid_Lock
);
361 list_for_each_safe(tmp
, tmp2
, &server
->pending_mid_q
) {
362 mid_entry
= list_entry(tmp
, struct mid_q_entry
, qhead
);
363 if (mid_entry
->mid_state
== MID_REQUEST_SUBMITTED
)
364 mid_entry
->mid_state
= MID_RETRY_NEEDED
;
365 list_move(&mid_entry
->qhead
, &retry_list
);
367 spin_unlock(&GlobalMid_Lock
);
369 cifs_dbg(FYI
, "%s: issuing mid callbacks\n", __func__
);
370 list_for_each_safe(tmp
, tmp2
, &retry_list
) {
371 mid_entry
= list_entry(tmp
, struct mid_q_entry
, qhead
);
372 list_del_init(&mid_entry
->qhead
);
373 mid_entry
->callback(mid_entry
);
379 /* we should try only the port we connected to before */
380 rc
= generic_ip_connect(server
);
382 cifs_dbg(FYI
, "reconnect error %d\n", rc
);
385 atomic_inc(&tcpSesReconnectCount
);
386 spin_lock(&GlobalMid_Lock
);
387 if (server
->tcpStatus
!= CifsExiting
)
388 server
->tcpStatus
= CifsNeedNegotiate
;
389 spin_unlock(&GlobalMid_Lock
);
391 } while (server
->tcpStatus
== CifsNeedReconnect
);
397 cifs_echo_request(struct work_struct
*work
)
400 struct TCP_Server_Info
*server
= container_of(work
,
401 struct TCP_Server_Info
, echo
.work
);
404 * We cannot send an echo if it is disabled or until the
405 * NEGOTIATE_PROTOCOL request is done, which is indicated by
406 * server->ops->need_neg() == true. Also, no need to ping if
407 * we got a response recently.
409 if (!server
->ops
->need_neg
|| server
->ops
->need_neg(server
) ||
410 (server
->ops
->can_echo
&& !server
->ops
->can_echo(server
)) ||
411 time_before(jiffies
, server
->lstrp
+ SMB_ECHO_INTERVAL
- HZ
))
414 rc
= server
->ops
->echo
? server
->ops
->echo(server
) : -ENOSYS
;
416 cifs_dbg(FYI
, "Unable to send echo request to server: %s\n",
420 queue_delayed_work(cifsiod_wq
, &server
->echo
, SMB_ECHO_INTERVAL
);
424 allocate_buffers(struct TCP_Server_Info
*server
)
426 if (!server
->bigbuf
) {
427 server
->bigbuf
= (char *)cifs_buf_get();
428 if (!server
->bigbuf
) {
429 cifs_dbg(VFS
, "No memory for large SMB response\n");
431 /* retry will check if exiting */
434 } else if (server
->large_buf
) {
435 /* we are reusing a dirty large buf, clear its start */
436 memset(server
->bigbuf
, 0, HEADER_SIZE(server
));
439 if (!server
->smallbuf
) {
440 server
->smallbuf
= (char *)cifs_small_buf_get();
441 if (!server
->smallbuf
) {
442 cifs_dbg(VFS
, "No memory for SMB response\n");
444 /* retry will check if exiting */
447 /* beginning of smb buffer is cleared in our buf_get */
449 /* if existing small buf clear beginning */
450 memset(server
->smallbuf
, 0, HEADER_SIZE(server
));
457 server_unresponsive(struct TCP_Server_Info
*server
)
460 * We need to wait 2 echo intervals to make sure we handle such
462 * 1s client sends a normal SMB request
463 * 2s client gets a response
464 * 30s echo workqueue job pops, and decides we got a response recently
465 * and don't need to send another
467 * 65s kernel_recvmsg times out, and we see that we haven't gotten
468 * a response in >60s.
470 if (server
->tcpStatus
== CifsGood
&&
471 time_after(jiffies
, server
->lstrp
+ 2 * SMB_ECHO_INTERVAL
)) {
472 cifs_dbg(VFS
, "Server %s has not responded in %d seconds. Reconnecting...\n",
473 server
->hostname
, (2 * SMB_ECHO_INTERVAL
) / HZ
);
474 cifs_reconnect(server
);
475 wake_up(&server
->response_q
);
483 * kvec_array_init - clone a kvec array, and advance into it
484 * @new: pointer to memory for cloned array
485 * @iov: pointer to original array
486 * @nr_segs: number of members in original array
487 * @bytes: number of bytes to advance into the cloned array
489 * This function will copy the array provided in iov to a section of memory
490 * and advance the specified number of bytes into the new array. It returns
491 * the number of segments in the new array. "new" must be at least as big as
492 * the original iov array.
495 kvec_array_init(struct kvec
*new, struct kvec
*iov
, unsigned int nr_segs
,
500 while (bytes
|| !iov
->iov_len
) {
501 int copy
= min(bytes
, iov
->iov_len
);
505 if (iov
->iov_len
== base
) {
511 memcpy(new, iov
, sizeof(*iov
) * nr_segs
);
512 new->iov_base
+= base
;
513 new->iov_len
-= base
;
518 get_server_iovec(struct TCP_Server_Info
*server
, unsigned int nr_segs
)
520 struct kvec
*new_iov
;
522 if (server
->iov
&& nr_segs
<= server
->nr_iov
)
525 /* not big enough -- allocate a new one and release the old */
526 new_iov
= kmalloc(sizeof(*new_iov
) * nr_segs
, GFP_NOFS
);
529 server
->iov
= new_iov
;
530 server
->nr_iov
= nr_segs
;
536 cifs_readv_from_socket(struct TCP_Server_Info
*server
, struct kvec
*iov_orig
,
537 unsigned int nr_segs
, unsigned int to_read
)
542 struct msghdr smb_msg
;
545 iov
= get_server_iovec(server
, nr_segs
);
549 smb_msg
.msg_control
= NULL
;
550 smb_msg
.msg_controllen
= 0;
552 for (total_read
= 0; to_read
; total_read
+= length
, to_read
-= length
) {
555 if (server_unresponsive(server
)) {
556 total_read
= -EAGAIN
;
560 segs
= kvec_array_init(iov
, iov_orig
, nr_segs
, total_read
);
562 length
= kernel_recvmsg(server
->ssocket
, &smb_msg
,
563 iov
, segs
, to_read
, 0);
565 if (server
->tcpStatus
== CifsExiting
) {
566 total_read
= -ESHUTDOWN
;
568 } else if (server
->tcpStatus
== CifsNeedReconnect
) {
569 cifs_reconnect(server
);
570 total_read
= -EAGAIN
;
572 } else if (length
== -ERESTARTSYS
||
576 * Minimum sleep to prevent looping, allowing socket
577 * to clear and app threads to set tcpStatus
578 * CifsNeedReconnect if server hung.
580 usleep_range(1000, 2000);
583 } else if (length
<= 0) {
584 cifs_dbg(FYI
, "Received no data or error: expecting %d\n"
585 "got %d", to_read
, length
);
586 cifs_reconnect(server
);
587 total_read
= -EAGAIN
;
595 cifs_read_from_socket(struct TCP_Server_Info
*server
, char *buf
,
596 unsigned int to_read
)
601 iov
.iov_len
= to_read
;
603 return cifs_readv_from_socket(server
, &iov
, 1, to_read
);
607 is_smb_response(struct TCP_Server_Info
*server
, unsigned char type
)
610 * The first byte big endian of the length field,
611 * is actually not part of the length but the type
612 * with the most common, zero, as regular data.
615 case RFC1002_SESSION_MESSAGE
:
616 /* Regular SMB response */
618 case RFC1002_SESSION_KEEP_ALIVE
:
619 cifs_dbg(FYI
, "RFC 1002 session keep alive\n");
621 case RFC1002_POSITIVE_SESSION_RESPONSE
:
622 cifs_dbg(FYI
, "RFC 1002 positive session response\n");
624 case RFC1002_NEGATIVE_SESSION_RESPONSE
:
626 * We get this from Windows 98 instead of an error on
627 * SMB negprot response.
629 cifs_dbg(FYI
, "RFC 1002 negative session response\n");
630 /* give server a second to clean up */
633 * Always try 445 first on reconnect since we get NACK
634 * on some if we ever connected to port 139 (the NACK
635 * is since we do not begin with RFC1001 session
638 cifs_set_port((struct sockaddr
*)&server
->dstaddr
, CIFS_PORT
);
639 cifs_reconnect(server
);
640 wake_up(&server
->response_q
);
643 cifs_dbg(VFS
, "RFC 1002 unknown response type 0x%x\n", type
);
644 cifs_reconnect(server
);
651 dequeue_mid(struct mid_q_entry
*mid
, bool malformed
)
653 #ifdef CONFIG_CIFS_STATS2
654 mid
->when_received
= jiffies
;
656 spin_lock(&GlobalMid_Lock
);
658 mid
->mid_state
= MID_RESPONSE_RECEIVED
;
660 mid
->mid_state
= MID_RESPONSE_MALFORMED
;
661 list_del_init(&mid
->qhead
);
662 spin_unlock(&GlobalMid_Lock
);
666 handle_mid(struct mid_q_entry
*mid
, struct TCP_Server_Info
*server
,
667 char *buf
, int malformed
)
669 if (server
->ops
->check_trans2
&&
670 server
->ops
->check_trans2(mid
, server
, buf
, malformed
))
673 mid
->large_buf
= server
->large_buf
;
674 /* Was previous buf put in mpx struct for multi-rsp? */
675 if (!mid
->multiRsp
) {
676 /* smb buffer will be freed by user thread */
677 if (server
->large_buf
)
678 server
->bigbuf
= NULL
;
680 server
->smallbuf
= NULL
;
682 dequeue_mid(mid
, malformed
);
685 static void clean_demultiplex_info(struct TCP_Server_Info
*server
)
689 /* take it off the list, if it's not already */
690 spin_lock(&cifs_tcp_ses_lock
);
691 list_del_init(&server
->tcp_ses_list
);
692 spin_unlock(&cifs_tcp_ses_lock
);
694 spin_lock(&GlobalMid_Lock
);
695 server
->tcpStatus
= CifsExiting
;
696 spin_unlock(&GlobalMid_Lock
);
697 wake_up_all(&server
->response_q
);
699 /* check if we have blocked requests that need to free */
700 spin_lock(&server
->req_lock
);
701 if (server
->credits
<= 0)
703 spin_unlock(&server
->req_lock
);
705 * Although there should not be any requests blocked on this queue it
706 * can not hurt to be paranoid and try to wake up requests that may
707 * haven been blocked when more than 50 at time were on the wire to the
708 * same server - they now will see the session is in exit state and get
709 * out of SendReceive.
711 wake_up_all(&server
->request_q
);
712 /* give those requests time to exit */
715 if (server
->ssocket
) {
716 sock_release(server
->ssocket
);
717 server
->ssocket
= NULL
;
720 if (!list_empty(&server
->pending_mid_q
)) {
721 struct list_head dispose_list
;
722 struct mid_q_entry
*mid_entry
;
723 struct list_head
*tmp
, *tmp2
;
725 INIT_LIST_HEAD(&dispose_list
);
726 spin_lock(&GlobalMid_Lock
);
727 list_for_each_safe(tmp
, tmp2
, &server
->pending_mid_q
) {
728 mid_entry
= list_entry(tmp
, struct mid_q_entry
, qhead
);
729 cifs_dbg(FYI
, "Clearing mid 0x%llx\n", mid_entry
->mid
);
730 mid_entry
->mid_state
= MID_SHUTDOWN
;
731 list_move(&mid_entry
->qhead
, &dispose_list
);
733 spin_unlock(&GlobalMid_Lock
);
735 /* now walk dispose list and issue callbacks */
736 list_for_each_safe(tmp
, tmp2
, &dispose_list
) {
737 mid_entry
= list_entry(tmp
, struct mid_q_entry
, qhead
);
738 cifs_dbg(FYI
, "Callback mid 0x%llx\n", mid_entry
->mid
);
739 list_del_init(&mid_entry
->qhead
);
740 mid_entry
->callback(mid_entry
);
742 /* 1/8th of sec is more than enough time for them to exit */
746 if (!list_empty(&server
->pending_mid_q
)) {
748 * mpx threads have not exited yet give them at least the smb
749 * send timeout time for long ops.
751 * Due to delays on oplock break requests, we need to wait at
752 * least 45 seconds before giving up on a request getting a
753 * response and going ahead and killing cifsd.
755 cifs_dbg(FYI
, "Wait for exit from demultiplex thread\n");
758 * If threads still have not exited they are probably never
759 * coming home not much else we can do but free the memory.
763 kfree(server
->hostname
);
767 length
= atomic_dec_return(&tcpSesAllocCount
);
769 mempool_resize(cifs_req_poolp
, length
+ cifs_min_rcv
,
774 standard_receive3(struct TCP_Server_Info
*server
, struct mid_q_entry
*mid
)
777 char *buf
= server
->smallbuf
;
778 unsigned int pdu_length
= get_rfc1002_length(buf
);
780 /* make sure this will fit in a large buffer */
781 if (pdu_length
> CIFSMaxBufSize
+ MAX_HEADER_SIZE(server
) - 4) {
782 cifs_dbg(VFS
, "SMB response too long (%u bytes)\n", pdu_length
);
783 cifs_reconnect(server
);
784 wake_up(&server
->response_q
);
788 /* switch to large buffer if too big for a small one */
789 if (pdu_length
> MAX_CIFS_SMALL_BUFFER_SIZE
- 4) {
790 server
->large_buf
= true;
791 memcpy(server
->bigbuf
, buf
, server
->total_read
);
792 buf
= server
->bigbuf
;
795 /* now read the rest */
796 length
= cifs_read_from_socket(server
, buf
+ HEADER_SIZE(server
) - 1,
797 pdu_length
- HEADER_SIZE(server
) + 1 + 4);
800 server
->total_read
+= length
;
802 dump_smb(buf
, server
->total_read
);
805 * We know that we received enough to get to the MID as we
806 * checked the pdu_length earlier. Now check to see
807 * if the rest of the header is OK. We borrow the length
808 * var for the rest of the loop to avoid a new stack var.
810 * 48 bytes is enough to display the header and a little bit
811 * into the payload for debugging purposes.
813 length
= server
->ops
->check_message(buf
, server
->total_read
);
815 cifs_dump_mem("Bad SMB: ", buf
,
816 min_t(unsigned int, server
->total_read
, 48));
818 if (server
->ops
->is_status_pending
&&
819 server
->ops
->is_status_pending(buf
, server
, length
))
825 handle_mid(mid
, server
, buf
, length
);
830 cifs_demultiplex_thread(void *p
)
833 struct TCP_Server_Info
*server
= p
;
834 unsigned int pdu_length
;
836 struct task_struct
*task_to_wake
= NULL
;
837 struct mid_q_entry
*mid_entry
;
839 current
->flags
|= PF_MEMALLOC
;
840 cifs_dbg(FYI
, "Demultiplex PID: %d\n", task_pid_nr(current
));
842 length
= atomic_inc_return(&tcpSesAllocCount
);
844 mempool_resize(cifs_req_poolp
, length
+ cifs_min_rcv
,
848 while (server
->tcpStatus
!= CifsExiting
) {
852 if (!allocate_buffers(server
))
855 server
->large_buf
= false;
856 buf
= server
->smallbuf
;
857 pdu_length
= 4; /* enough to get RFC1001 header */
859 length
= cifs_read_from_socket(server
, buf
, pdu_length
);
862 server
->total_read
= length
;
865 * The right amount was read from socket - 4 bytes,
866 * so we can now interpret the length field.
868 pdu_length
= get_rfc1002_length(buf
);
870 cifs_dbg(FYI
, "RFC1002 header 0x%x\n", pdu_length
);
871 if (!is_smb_response(server
, buf
[0]))
874 /* make sure we have enough to get to the MID */
875 if (pdu_length
< HEADER_SIZE(server
) - 1 - 4) {
876 cifs_dbg(VFS
, "SMB response too short (%u bytes)\n",
878 cifs_reconnect(server
);
879 wake_up(&server
->response_q
);
883 /* read down to the MID */
884 length
= cifs_read_from_socket(server
, buf
+ 4,
885 HEADER_SIZE(server
) - 1 - 4);
888 server
->total_read
+= length
;
890 mid_entry
= server
->ops
->find_mid(server
, buf
);
892 if (!mid_entry
|| !mid_entry
->receive
)
893 length
= standard_receive3(server
, mid_entry
);
895 length
= mid_entry
->receive(server
, mid_entry
);
900 if (server
->large_buf
)
901 buf
= server
->bigbuf
;
903 server
->lstrp
= jiffies
;
904 if (mid_entry
!= NULL
) {
905 if (!mid_entry
->multiRsp
|| mid_entry
->multiEnd
)
906 mid_entry
->callback(mid_entry
);
907 } else if (!server
->ops
->is_oplock_break
||
908 !server
->ops
->is_oplock_break(buf
, server
)) {
909 cifs_dbg(VFS
, "No task to wake, unknown frame received! NumMids %d\n",
910 atomic_read(&midCount
));
911 cifs_dump_mem("Received Data is: ", buf
,
912 HEADER_SIZE(server
));
913 #ifdef CONFIG_CIFS_DEBUG2
914 if (server
->ops
->dump_detail
)
915 server
->ops
->dump_detail(buf
);
916 cifs_dump_mids(server
);
917 #endif /* CIFS_DEBUG2 */
920 } /* end while !EXITING */
922 /* buffer usually freed in free_mid - need to free it here on exit */
923 cifs_buf_release(server
->bigbuf
);
924 if (server
->smallbuf
) /* no sense logging a debug message if NULL */
925 cifs_small_buf_release(server
->smallbuf
);
927 task_to_wake
= xchg(&server
->tsk
, NULL
);
928 clean_demultiplex_info(server
);
930 /* if server->tsk was NULL then wait for a signal before exiting */
932 set_current_state(TASK_INTERRUPTIBLE
);
933 while (!signal_pending(current
)) {
935 set_current_state(TASK_INTERRUPTIBLE
);
937 set_current_state(TASK_RUNNING
);
940 module_put_and_exit(0);
943 /* extract the host portion of the UNC string */
945 extract_hostname(const char *unc
)
951 /* skip double chars at beginning of string */
952 /* BB: check validity of these bytes? */
955 /* delimiter between hostname and sharename is always '\\' now */
956 delim
= strchr(src
, '\\');
958 return ERR_PTR(-EINVAL
);
961 dst
= kmalloc((len
+ 1), GFP_KERNEL
);
963 return ERR_PTR(-ENOMEM
);
965 memcpy(dst
, src
, len
);
971 static int get_option_ul(substring_t args
[], unsigned long *option
)
976 string
= match_strdup(args
);
979 rc
= kstrtoul(string
, 0, option
);
985 static int get_option_uid(substring_t args
[], kuid_t
*result
)
991 rc
= get_option_ul(args
, &value
);
995 uid
= make_kuid(current_user_ns(), value
);
1003 static int get_option_gid(substring_t args
[], kgid_t
*result
)
1005 unsigned long value
;
1009 rc
= get_option_ul(args
, &value
);
1013 gid
= make_kgid(current_user_ns(), value
);
1014 if (!gid_valid(gid
))
1021 static int cifs_parse_security_flavors(char *value
,
1022 struct smb_vol
*vol
)
1025 substring_t args
[MAX_OPT_ARGS
];
1027 switch (match_token(value
, cifs_secflavor_tokens
, args
)) {
1029 vol
->secFlg
|= CIFSSEC_MAY_KRB5
| CIFSSEC_MAY_SIGN
;
1032 vol
->secFlg
|= CIFSSEC_MAY_KRB5
| CIFSSEC_MUST_SIGN
;
1035 /* vol->secFlg |= CIFSSEC_MUST_SEAL | CIFSSEC_MAY_KRB5; */
1036 cifs_dbg(VFS
, "Krb5 cifs privacy not supported\n");
1038 case Opt_sec_ntlmssp
:
1039 vol
->secFlg
|= CIFSSEC_MAY_NTLMSSP
;
1041 case Opt_sec_ntlmsspi
:
1042 vol
->secFlg
|= CIFSSEC_MAY_NTLMSSP
| CIFSSEC_MUST_SIGN
;
1045 /* ntlm is default so can be turned off too */
1046 vol
->secFlg
|= CIFSSEC_MAY_NTLM
;
1049 vol
->secFlg
|= CIFSSEC_MAY_NTLM
| CIFSSEC_MUST_SIGN
;
1051 case Opt_sec_ntlmv2
:
1052 vol
->secFlg
|= CIFSSEC_MAY_NTLMV2
;
1054 case Opt_sec_ntlmv2i
:
1055 vol
->secFlg
|= CIFSSEC_MAY_NTLMV2
| CIFSSEC_MUST_SIGN
;
1057 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1058 case Opt_sec_lanman
:
1059 vol
->secFlg
|= CIFSSEC_MAY_LANMAN
;
1066 cifs_dbg(VFS
, "bad security option: %s\n", value
);
1074 cifs_parse_cache_flavor(char *value
, struct smb_vol
*vol
)
1076 substring_t args
[MAX_OPT_ARGS
];
1078 switch (match_token(value
, cifs_cacheflavor_tokens
, args
)) {
1079 case Opt_cache_loose
:
1080 vol
->direct_io
= false;
1081 vol
->strict_io
= false;
1083 case Opt_cache_strict
:
1084 vol
->direct_io
= false;
1085 vol
->strict_io
= true;
1087 case Opt_cache_none
:
1088 vol
->direct_io
= true;
1089 vol
->strict_io
= false;
1092 cifs_dbg(VFS
, "bad cache= option: %s\n", value
);
1099 cifs_parse_smb_version(char *value
, struct smb_vol
*vol
)
1101 substring_t args
[MAX_OPT_ARGS
];
1103 switch (match_token(value
, cifs_smb_version_tokens
, args
)) {
1105 vol
->ops
= &smb1_operations
;
1106 vol
->vals
= &smb1_values
;
1108 #ifdef CONFIG_CIFS_SMB2
1110 vol
->ops
= &smb21_operations
; /* currently identical with 2.1 */
1111 vol
->vals
= &smb20_values
;
1114 vol
->ops
= &smb21_operations
;
1115 vol
->vals
= &smb21_values
;
1118 vol
->ops
= &smb30_operations
;
1119 vol
->vals
= &smb30_values
;
1123 cifs_dbg(VFS
, "Unknown vers= option specified: %s\n", value
);
1130 * Parse a devname into substrings and populate the vol->UNC and vol->prepath
1131 * fields with the result. Returns 0 on success and an error otherwise.
1134 cifs_parse_devname(const char *devname
, struct smb_vol
*vol
)
1137 const char *delims
= "/\\";
1140 /* make sure we have a valid UNC double delimiter prefix */
1141 len
= strspn(devname
, delims
);
1145 /* find delimiter between host and sharename */
1146 pos
= strpbrk(devname
+ 2, delims
);
1150 /* skip past delimiter */
1153 /* now go until next delimiter or end of string */
1154 len
= strcspn(pos
, delims
);
1156 /* move "pos" up to delimiter or NULL */
1158 vol
->UNC
= kstrndup(devname
, pos
- devname
, GFP_KERNEL
);
1162 convert_delimiter(vol
->UNC
, '\\');
1164 /* If pos is NULL, or is a bogus trailing delimiter then no prepath */
1165 if (!*pos
++ || !*pos
)
1168 vol
->prepath
= kstrdup(pos
, GFP_KERNEL
);
1176 cifs_parse_mount_options(const char *mountdata
, const char *devname
,
1177 struct smb_vol
*vol
)
1180 char *mountdata_copy
= NULL
, *options
;
1181 unsigned int temp_len
, i
, j
;
1183 short int override_uid
= -1;
1184 short int override_gid
= -1;
1185 bool uid_specified
= false;
1186 bool gid_specified
= false;
1187 bool sloppy
= false;
1188 char *invalid
= NULL
;
1189 char *nodename
= utsname()->nodename
;
1190 char *string
= NULL
;
1191 char *tmp_end
, *value
;
1193 bool got_ip
= false;
1194 unsigned short port
= 0;
1195 struct sockaddr
*dstaddr
= (struct sockaddr
*)&vol
->dstaddr
;
1199 delim
= separator
[0];
1201 /* ensure we always start with zeroed-out smb_vol */
1202 memset(vol
, 0, sizeof(*vol
));
1205 * does not have to be perfect mapping since field is
1206 * informational, only used for servers that do not support
1207 * port 445 and it can be overridden at mount time
1209 memset(vol
->source_rfc1001_name
, 0x20, RFC1001_NAME_LEN
);
1210 for (i
= 0; i
< strnlen(nodename
, RFC1001_NAME_LEN
); i
++)
1211 vol
->source_rfc1001_name
[i
] = toupper(nodename
[i
]);
1213 vol
->source_rfc1001_name
[RFC1001_NAME_LEN
] = 0;
1214 /* null target name indicates to use *SMBSERVR default called name
1215 if we end up sending RFC1001 session initialize */
1216 vol
->target_rfc1001_name
[0] = 0;
1217 vol
->cred_uid
= current_uid();
1218 vol
->linux_uid
= current_uid();
1219 vol
->linux_gid
= current_gid();
1221 /* default to only allowing write access to owner of the mount */
1222 vol
->dir_mode
= vol
->file_mode
= S_IRUGO
| S_IXUGO
| S_IWUSR
;
1224 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
1225 /* default is always to request posix paths. */
1226 vol
->posix_paths
= 1;
1227 /* default to using server inode numbers where available */
1228 vol
->server_ino
= 1;
1230 /* default is to use strict cifs caching semantics */
1231 vol
->strict_io
= true;
1233 vol
->actimeo
= CIFS_DEF_ACTIMEO
;
1235 /* FIXME: add autonegotiation -- for now, SMB1 is default */
1236 vol
->ops
= &smb1_operations
;
1237 vol
->vals
= &smb1_values
;
1240 goto cifs_parse_mount_err
;
1242 mountdata_copy
= kstrndup(mountdata
, PAGE_SIZE
, GFP_KERNEL
);
1243 if (!mountdata_copy
)
1244 goto cifs_parse_mount_err
;
1246 options
= mountdata_copy
;
1247 end
= options
+ strlen(options
);
1249 if (strncmp(options
, "sep=", 4) == 0) {
1250 if (options
[4] != 0) {
1251 separator
[0] = options
[4];
1254 cifs_dbg(FYI
, "Null separator not allowed\n");
1257 vol
->backupuid_specified
= false; /* no backup intent for a user */
1258 vol
->backupgid_specified
= false; /* no backup intent for a group */
1261 * For now, we ignore -EINVAL errors under the assumption that the
1262 * unc= and prefixpath= options will be usable.
1264 if (cifs_parse_devname(devname
, vol
) == -ENOMEM
) {
1265 printk(KERN_ERR
"CIFS: Unable to allocate memory to parse "
1266 "device string.\n");
1270 while ((data
= strsep(&options
, separator
)) != NULL
) {
1271 substring_t args
[MAX_OPT_ARGS
];
1272 unsigned long option
;
1278 token
= match_token(data
, cifs_mount_option_tokens
, args
);
1282 /* Ingnore the following */
1286 /* Boolean values */
1287 case Opt_user_xattr
:
1290 case Opt_nouser_xattr
:
1296 case Opt_noforceuid
:
1302 case Opt_noforcegid
:
1305 case Opt_noblocksend
:
1306 vol
->noblocksnd
= 1;
1308 case Opt_noautotune
:
1309 vol
->noautotune
= 1;
1326 case Opt_nomapchars
:
1338 case Opt_posixpaths
:
1339 vol
->posix_paths
= 1;
1341 case Opt_noposixpaths
:
1342 vol
->posix_paths
= 0;
1345 vol
->no_linux_ext
= 1;
1356 * turn off mandatory locking in mode
1357 * if remote locking is turned off since the
1358 * local vfs will do advisory
1360 if (vol
->file_mode
==
1361 (S_IALLUGO
& ~(S_ISUID
| S_IXGRP
)))
1362 vol
->file_mode
= S_IALLUGO
;
1364 case Opt_forcemandatorylock
:
1374 vol
->dynperm
= true;
1377 vol
->dynperm
= false;
1391 case Opt_nostrictsync
:
1392 vol
->nostrictsync
= 1;
1394 case Opt_strictsync
:
1395 vol
->nostrictsync
= 0;
1398 vol
->server_ino
= 1;
1400 case Opt_noserverino
:
1401 vol
->server_ino
= 0;
1403 case Opt_rwpidforward
:
1404 vol
->rwpidforward
= 1;
1413 vol
->no_psx_acl
= 0;
1416 vol
->no_psx_acl
= 1;
1418 case Opt_locallease
:
1419 vol
->local_lease
= 1;
1422 vol
->secFlg
|= CIFSSEC_MUST_SIGN
;
1425 /* we do not do the following in secFlags because seal
1426 * is a per tree connection (mount) not a per socket
1427 * or per-smb connection option in the protocol
1428 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1433 printk(KERN_WARNING
"CIFS: Mount option noac not "
1434 "supported. Instead set "
1435 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1438 #ifndef CONFIG_CIFS_FSCACHE
1439 cifs_dbg(VFS
, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n");
1440 goto cifs_parse_mount_err
;
1444 case Opt_mfsymlinks
:
1445 vol
->mfsymlinks
= true;
1448 vol
->multiuser
= true;
1454 /* Numeric Values */
1456 if (get_option_uid(args
, &vol
->backupuid
)) {
1457 cifs_dbg(VFS
, "%s: Invalid backupuid value\n",
1459 goto cifs_parse_mount_err
;
1461 vol
->backupuid_specified
= true;
1464 if (get_option_gid(args
, &vol
->backupgid
)) {
1465 cifs_dbg(VFS
, "%s: Invalid backupgid value\n",
1467 goto cifs_parse_mount_err
;
1469 vol
->backupgid_specified
= true;
1472 if (get_option_uid(args
, &vol
->linux_uid
)) {
1473 cifs_dbg(VFS
, "%s: Invalid uid value\n",
1475 goto cifs_parse_mount_err
;
1477 uid_specified
= true;
1480 if (get_option_uid(args
, &vol
->cred_uid
)) {
1481 cifs_dbg(VFS
, "%s: Invalid cruid value\n",
1483 goto cifs_parse_mount_err
;
1487 if (get_option_gid(args
, &vol
->linux_gid
)) {
1488 cifs_dbg(VFS
, "%s: Invalid gid value\n",
1490 goto cifs_parse_mount_err
;
1492 gid_specified
= true;
1495 if (get_option_ul(args
, &option
)) {
1496 cifs_dbg(VFS
, "%s: Invalid file_mode value\n",
1498 goto cifs_parse_mount_err
;
1500 vol
->file_mode
= option
;
1503 if (get_option_ul(args
, &option
)) {
1504 cifs_dbg(VFS
, "%s: Invalid dir_mode value\n",
1506 goto cifs_parse_mount_err
;
1508 vol
->dir_mode
= option
;
1511 if (get_option_ul(args
, &option
) ||
1512 option
> USHRT_MAX
) {
1513 cifs_dbg(VFS
, "%s: Invalid port value\n",
1515 goto cifs_parse_mount_err
;
1517 port
= (unsigned short)option
;
1520 if (get_option_ul(args
, &option
)) {
1521 cifs_dbg(VFS
, "%s: Invalid rsize value\n",
1523 goto cifs_parse_mount_err
;
1525 vol
->rsize
= option
;
1528 if (get_option_ul(args
, &option
)) {
1529 cifs_dbg(VFS
, "%s: Invalid wsize value\n",
1531 goto cifs_parse_mount_err
;
1533 vol
->wsize
= option
;
1536 if (get_option_ul(args
, &option
)) {
1537 cifs_dbg(VFS
, "%s: Invalid actimeo value\n",
1539 goto cifs_parse_mount_err
;
1541 vol
->actimeo
= HZ
* option
;
1542 if (vol
->actimeo
> CIFS_MAX_ACTIMEO
) {
1543 cifs_dbg(VFS
, "attribute cache timeout too large\n");
1544 goto cifs_parse_mount_err
;
1548 /* String Arguments */
1550 case Opt_blank_user
:
1551 /* null user, ie. anonymous authentication */
1553 vol
->username
= NULL
;
1556 string
= match_strdup(args
);
1560 if (strnlen(string
, MAX_USERNAME_SIZE
) >
1561 MAX_USERNAME_SIZE
) {
1562 printk(KERN_WARNING
"CIFS: username too long\n");
1563 goto cifs_parse_mount_err
;
1565 vol
->username
= kstrdup(string
, GFP_KERNEL
);
1567 goto cifs_parse_mount_err
;
1569 case Opt_blank_pass
:
1570 /* passwords have to be handled differently
1571 * to allow the character used for deliminator
1572 * to be passed within them
1576 * Check if this is a case where the password
1577 * starts with a delimiter
1579 tmp_end
= strchr(data
, '=');
1581 if (!(tmp_end
< end
&& tmp_end
[1] == delim
)) {
1582 /* No it is not. Set the password to NULL */
1583 vol
->password
= NULL
;
1586 /* Yes it is. Drop down to Opt_pass below.*/
1588 /* Obtain the value string */
1589 value
= strchr(data
, '=');
1592 /* Set tmp_end to end of the string */
1593 tmp_end
= (char *) value
+ strlen(value
);
1595 /* Check if following character is the deliminator
1596 * If yes, we have encountered a double deliminator
1597 * reset the NULL character to the deliminator
1599 if (tmp_end
< end
&& tmp_end
[1] == delim
) {
1602 /* Keep iterating until we get to a single
1603 * deliminator OR the end
1605 while ((tmp_end
= strchr(tmp_end
, delim
))
1606 != NULL
&& (tmp_end
[1] == delim
)) {
1607 tmp_end
= (char *) &tmp_end
[2];
1610 /* Reset var options to point to next element */
1613 options
= (char *) &tmp_end
[1];
1615 /* Reached the end of the mount option
1620 /* Now build new password string */
1621 temp_len
= strlen(value
);
1622 vol
->password
= kzalloc(temp_len
+1, GFP_KERNEL
);
1623 if (vol
->password
== NULL
) {
1624 printk(KERN_WARNING
"CIFS: no memory "
1626 goto cifs_parse_mount_err
;
1629 for (i
= 0, j
= 0; i
< temp_len
; i
++, j
++) {
1630 vol
->password
[j
] = value
[i
];
1631 if ((value
[i
] == delim
) &&
1632 value
[i
+1] == delim
)
1633 /* skip the second deliminator */
1636 vol
->password
[j
] = '\0';
1639 /* FIXME: should this be an error instead? */
1643 string
= match_strdup(args
);
1647 if (!cifs_convert_address(dstaddr
, string
,
1649 printk(KERN_ERR
"CIFS: bad ip= option (%s).\n",
1651 goto cifs_parse_mount_err
;
1656 string
= match_strdup(args
);
1660 if (strnlen(string
, 256) == 256) {
1661 printk(KERN_WARNING
"CIFS: domain name too"
1663 goto cifs_parse_mount_err
;
1666 vol
->domainname
= kstrdup(string
, GFP_KERNEL
);
1667 if (!vol
->domainname
) {
1668 printk(KERN_WARNING
"CIFS: no memory "
1669 "for domainname\n");
1670 goto cifs_parse_mount_err
;
1672 cifs_dbg(FYI
, "Domain name set\n");
1675 string
= match_strdup(args
);
1679 if (!cifs_convert_address(
1680 (struct sockaddr
*)&vol
->srcaddr
,
1681 string
, strlen(string
))) {
1682 printk(KERN_WARNING
"CIFS: Could not parse"
1683 " srcaddr: %s\n", string
);
1684 goto cifs_parse_mount_err
;
1688 string
= match_strdup(args
);
1692 if (strnlen(string
, 1024) >= 65) {
1693 printk(KERN_WARNING
"CIFS: iocharset name "
1695 goto cifs_parse_mount_err
;
1698 if (strnicmp(string
, "default", 7) != 0) {
1699 vol
->iocharset
= kstrdup(string
,
1701 if (!vol
->iocharset
) {
1702 printk(KERN_WARNING
"CIFS: no memory"
1704 goto cifs_parse_mount_err
;
1707 /* if iocharset not set then load_nls_default
1710 cifs_dbg(FYI
, "iocharset set to %s\n", string
);
1712 case Opt_netbiosname
:
1713 string
= match_strdup(args
);
1717 memset(vol
->source_rfc1001_name
, 0x20,
1720 * FIXME: are there cases in which a comma can
1721 * be valid in workstation netbios name (and
1722 * need special handling)?
1724 for (i
= 0; i
< RFC1001_NAME_LEN
; i
++) {
1725 /* don't ucase netbiosname for user */
1728 vol
->source_rfc1001_name
[i
] = string
[i
];
1730 /* The string has 16th byte zero still from
1731 * set at top of the function
1733 if (i
== RFC1001_NAME_LEN
&& string
[i
] != 0)
1734 printk(KERN_WARNING
"CIFS: netbiosname"
1735 " longer than 15 truncated.\n");
1739 /* servernetbiosname specified override *SMBSERVER */
1740 string
= match_strdup(args
);
1744 /* last byte, type, is 0x20 for servr type */
1745 memset(vol
->target_rfc1001_name
, 0x20,
1746 RFC1001_NAME_LEN_WITH_NULL
);
1748 /* BB are there cases in which a comma can be
1749 valid in this workstation netbios name
1750 (and need special handling)? */
1752 /* user or mount helper must uppercase the
1754 for (i
= 0; i
< 15; i
++) {
1757 vol
->target_rfc1001_name
[i
] = string
[i
];
1759 /* The string has 16th byte zero still from
1760 set at top of the function */
1761 if (i
== RFC1001_NAME_LEN
&& string
[i
] != 0)
1762 printk(KERN_WARNING
"CIFS: server net"
1763 "biosname longer than 15 truncated.\n");
1766 string
= match_strdup(args
);
1770 if (strnicmp(string
, "1", 1) == 0) {
1771 /* This is the default */
1774 /* For all other value, error */
1775 printk(KERN_WARNING
"CIFS: Invalid version"
1777 goto cifs_parse_mount_err
;
1779 string
= match_strdup(args
);
1783 if (cifs_parse_smb_version(string
, vol
) != 0)
1784 goto cifs_parse_mount_err
;
1787 string
= match_strdup(args
);
1791 if (cifs_parse_security_flavors(string
, vol
) != 0)
1792 goto cifs_parse_mount_err
;
1795 string
= match_strdup(args
);
1799 if (cifs_parse_cache_flavor(string
, vol
) != 0)
1800 goto cifs_parse_mount_err
;
1804 * An option we don't recognize. Save it off for later
1805 * if we haven't already found one
1811 /* Free up any allocated string */
1816 if (!sloppy
&& invalid
) {
1817 printk(KERN_ERR
"CIFS: Unknown mount option \"%s\"\n", invalid
);
1818 goto cifs_parse_mount_err
;
1822 /* Muliuser mounts require CONFIG_KEYS support */
1823 if (vol
->multiuser
) {
1824 cifs_dbg(VFS
, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n");
1825 goto cifs_parse_mount_err
;
1829 cifs_dbg(VFS
, "CIFS mount error: No usable UNC path provided in device string or in unc= option!\n");
1830 goto cifs_parse_mount_err
;
1833 /* make sure UNC has a share name */
1834 if (!strchr(vol
->UNC
+ 3, '\\')) {
1835 cifs_dbg(VFS
, "Malformed UNC. Unable to find share name.\n");
1836 goto cifs_parse_mount_err
;
1840 /* No ip= option specified? Try to get it from UNC */
1841 if (!cifs_convert_address(dstaddr
, &vol
->UNC
[2],
1842 strlen(&vol
->UNC
[2]))) {
1843 printk(KERN_ERR
"Unable to determine destination "
1845 goto cifs_parse_mount_err
;
1849 /* set the port that we got earlier */
1850 cifs_set_port(dstaddr
, port
);
1853 vol
->override_uid
= override_uid
;
1854 else if (override_uid
== 1)
1855 printk(KERN_NOTICE
"CIFS: ignoring forceuid mount option "
1856 "specified with no uid= option.\n");
1859 vol
->override_gid
= override_gid
;
1860 else if (override_gid
== 1)
1861 printk(KERN_NOTICE
"CIFS: ignoring forcegid mount option "
1862 "specified with no gid= option.\n");
1864 kfree(mountdata_copy
);
1868 printk(KERN_WARNING
"Could not allocate temporary buffer\n");
1869 cifs_parse_mount_err
:
1871 kfree(mountdata_copy
);
1875 /** Returns true if srcaddr isn't specified and rhs isn't
1876 * specified, or if srcaddr is specified and
1877 * matches the IP address of the rhs argument.
1880 srcip_matches(struct sockaddr
*srcaddr
, struct sockaddr
*rhs
)
1882 switch (srcaddr
->sa_family
) {
1884 return (rhs
->sa_family
== AF_UNSPEC
);
1886 struct sockaddr_in
*saddr4
= (struct sockaddr_in
*)srcaddr
;
1887 struct sockaddr_in
*vaddr4
= (struct sockaddr_in
*)rhs
;
1888 return (saddr4
->sin_addr
.s_addr
== vaddr4
->sin_addr
.s_addr
);
1891 struct sockaddr_in6
*saddr6
= (struct sockaddr_in6
*)srcaddr
;
1892 struct sockaddr_in6
*vaddr6
= (struct sockaddr_in6
*)rhs
;
1893 return ipv6_addr_equal(&saddr6
->sin6_addr
, &vaddr6
->sin6_addr
);
1897 return false; /* don't expect to be here */
1902 * If no port is specified in addr structure, we try to match with 445 port
1903 * and if it fails - with 139 ports. It should be called only if address
1904 * families of server and addr are equal.
1907 match_port(struct TCP_Server_Info
*server
, struct sockaddr
*addr
)
1909 __be16 port
, *sport
;
1911 switch (addr
->sa_family
) {
1913 sport
= &((struct sockaddr_in
*) &server
->dstaddr
)->sin_port
;
1914 port
= ((struct sockaddr_in
*) addr
)->sin_port
;
1917 sport
= &((struct sockaddr_in6
*) &server
->dstaddr
)->sin6_port
;
1918 port
= ((struct sockaddr_in6
*) addr
)->sin6_port
;
1926 port
= htons(CIFS_PORT
);
1930 port
= htons(RFC1001_PORT
);
1933 return port
== *sport
;
1937 match_address(struct TCP_Server_Info
*server
, struct sockaddr
*addr
,
1938 struct sockaddr
*srcaddr
)
1940 switch (addr
->sa_family
) {
1942 struct sockaddr_in
*addr4
= (struct sockaddr_in
*)addr
;
1943 struct sockaddr_in
*srv_addr4
=
1944 (struct sockaddr_in
*)&server
->dstaddr
;
1946 if (addr4
->sin_addr
.s_addr
!= srv_addr4
->sin_addr
.s_addr
)
1951 struct sockaddr_in6
*addr6
= (struct sockaddr_in6
*)addr
;
1952 struct sockaddr_in6
*srv_addr6
=
1953 (struct sockaddr_in6
*)&server
->dstaddr
;
1955 if (!ipv6_addr_equal(&addr6
->sin6_addr
,
1956 &srv_addr6
->sin6_addr
))
1958 if (addr6
->sin6_scope_id
!= srv_addr6
->sin6_scope_id
)
1964 return false; /* don't expect to be here */
1967 if (!srcip_matches(srcaddr
, (struct sockaddr
*)&server
->srcaddr
))
1974 match_security(struct TCP_Server_Info
*server
, struct smb_vol
*vol
)
1976 unsigned int secFlags
;
1978 if (vol
->secFlg
& (~(CIFSSEC_MUST_SIGN
| CIFSSEC_MUST_SEAL
)))
1979 secFlags
= vol
->secFlg
;
1981 secFlags
= global_secflags
| vol
->secFlg
;
1983 switch (server
->secType
) {
1985 if (!(secFlags
& (CIFSSEC_MAY_LANMAN
|CIFSSEC_MAY_PLNTXT
)))
1989 if (!(secFlags
& CIFSSEC_MAY_NTLMV2
))
1993 if (!(secFlags
& CIFSSEC_MAY_NTLM
))
1997 if (!(secFlags
& CIFSSEC_MAY_KRB5
))
2001 if (!(secFlags
& CIFSSEC_MAY_NTLMSSP
))
2005 /* shouldn't happen */
2009 /* now check if signing mode is acceptable */
2010 if ((secFlags
& CIFSSEC_MAY_SIGN
) == 0 &&
2011 (server
->sec_mode
& SECMODE_SIGN_REQUIRED
))
2013 else if (((secFlags
& CIFSSEC_MUST_SIGN
) == CIFSSEC_MUST_SIGN
) &&
2015 (SECMODE_SIGN_ENABLED
|SECMODE_SIGN_REQUIRED
)) == 0)
2021 static int match_server(struct TCP_Server_Info
*server
, struct smb_vol
*vol
)
2023 struct sockaddr
*addr
= (struct sockaddr
*)&vol
->dstaddr
;
2025 if ((server
->vals
!= vol
->vals
) || (server
->ops
!= vol
->ops
))
2028 if (!net_eq(cifs_net_ns(server
), current
->nsproxy
->net_ns
))
2031 if (!match_address(server
, addr
,
2032 (struct sockaddr
*)&vol
->srcaddr
))
2035 if (!match_port(server
, addr
))
2038 if (!match_security(server
, vol
))
2044 static struct TCP_Server_Info
*
2045 cifs_find_tcp_session(struct smb_vol
*vol
)
2047 struct TCP_Server_Info
*server
;
2049 spin_lock(&cifs_tcp_ses_lock
);
2050 list_for_each_entry(server
, &cifs_tcp_ses_list
, tcp_ses_list
) {
2051 if (!match_server(server
, vol
))
2054 ++server
->srv_count
;
2055 spin_unlock(&cifs_tcp_ses_lock
);
2056 cifs_dbg(FYI
, "Existing tcp session with server found\n");
2059 spin_unlock(&cifs_tcp_ses_lock
);
2064 cifs_put_tcp_session(struct TCP_Server_Info
*server
)
2066 struct task_struct
*task
;
2068 spin_lock(&cifs_tcp_ses_lock
);
2069 if (--server
->srv_count
> 0) {
2070 spin_unlock(&cifs_tcp_ses_lock
);
2074 put_net(cifs_net_ns(server
));
2076 list_del_init(&server
->tcp_ses_list
);
2077 spin_unlock(&cifs_tcp_ses_lock
);
2079 cancel_delayed_work_sync(&server
->echo
);
2081 spin_lock(&GlobalMid_Lock
);
2082 server
->tcpStatus
= CifsExiting
;
2083 spin_unlock(&GlobalMid_Lock
);
2085 cifs_crypto_shash_release(server
);
2086 cifs_fscache_release_client_cookie(server
);
2088 kfree(server
->session_key
.response
);
2089 server
->session_key
.response
= NULL
;
2090 server
->session_key
.len
= 0;
2092 task
= xchg(&server
->tsk
, NULL
);
2094 force_sig(SIGKILL
, task
);
2097 static struct TCP_Server_Info
*
2098 cifs_get_tcp_session(struct smb_vol
*volume_info
)
2100 struct TCP_Server_Info
*tcp_ses
= NULL
;
2103 cifs_dbg(FYI
, "UNC: %s\n", volume_info
->UNC
);
2105 /* see if we already have a matching tcp_ses */
2106 tcp_ses
= cifs_find_tcp_session(volume_info
);
2110 tcp_ses
= kzalloc(sizeof(struct TCP_Server_Info
), GFP_KERNEL
);
2116 rc
= cifs_crypto_shash_allocate(tcp_ses
);
2118 cifs_dbg(VFS
, "could not setup hash structures rc %d\n", rc
);
2122 tcp_ses
->ops
= volume_info
->ops
;
2123 tcp_ses
->vals
= volume_info
->vals
;
2124 cifs_set_net_ns(tcp_ses
, get_net(current
->nsproxy
->net_ns
));
2125 tcp_ses
->hostname
= extract_hostname(volume_info
->UNC
);
2126 if (IS_ERR(tcp_ses
->hostname
)) {
2127 rc
= PTR_ERR(tcp_ses
->hostname
);
2128 goto out_err_crypto_release
;
2131 tcp_ses
->noblocksnd
= volume_info
->noblocksnd
;
2132 tcp_ses
->noautotune
= volume_info
->noautotune
;
2133 tcp_ses
->tcp_nodelay
= volume_info
->sockopt_tcp_nodelay
;
2134 tcp_ses
->in_flight
= 0;
2135 tcp_ses
->credits
= 1;
2136 init_waitqueue_head(&tcp_ses
->response_q
);
2137 init_waitqueue_head(&tcp_ses
->request_q
);
2138 INIT_LIST_HEAD(&tcp_ses
->pending_mid_q
);
2139 mutex_init(&tcp_ses
->srv_mutex
);
2140 memcpy(tcp_ses
->workstation_RFC1001_name
,
2141 volume_info
->source_rfc1001_name
, RFC1001_NAME_LEN_WITH_NULL
);
2142 memcpy(tcp_ses
->server_RFC1001_name
,
2143 volume_info
->target_rfc1001_name
, RFC1001_NAME_LEN_WITH_NULL
);
2144 tcp_ses
->session_estab
= false;
2145 tcp_ses
->sequence_number
= 0;
2146 tcp_ses
->lstrp
= jiffies
;
2147 spin_lock_init(&tcp_ses
->req_lock
);
2148 INIT_LIST_HEAD(&tcp_ses
->tcp_ses_list
);
2149 INIT_LIST_HEAD(&tcp_ses
->smb_ses_list
);
2150 INIT_DELAYED_WORK(&tcp_ses
->echo
, cifs_echo_request
);
2151 memcpy(&tcp_ses
->srcaddr
, &volume_info
->srcaddr
,
2152 sizeof(tcp_ses
->srcaddr
));
2153 memcpy(&tcp_ses
->dstaddr
, &volume_info
->dstaddr
,
2154 sizeof(tcp_ses
->dstaddr
));
2156 * at this point we are the only ones with the pointer
2157 * to the struct since the kernel thread not created yet
2158 * no need to spinlock this init of tcpStatus or srv_count
2160 tcp_ses
->tcpStatus
= CifsNew
;
2161 ++tcp_ses
->srv_count
;
2163 rc
= ip_connect(tcp_ses
);
2165 cifs_dbg(VFS
, "Error connecting to socket. Aborting operation.\n");
2166 goto out_err_crypto_release
;
2170 * since we're in a cifs function already, we know that
2171 * this will succeed. No need for try_module_get().
2173 __module_get(THIS_MODULE
);
2174 tcp_ses
->tsk
= kthread_run(cifs_demultiplex_thread
,
2176 if (IS_ERR(tcp_ses
->tsk
)) {
2177 rc
= PTR_ERR(tcp_ses
->tsk
);
2178 cifs_dbg(VFS
, "error %d create cifsd thread\n", rc
);
2179 module_put(THIS_MODULE
);
2180 goto out_err_crypto_release
;
2182 tcp_ses
->tcpStatus
= CifsNeedNegotiate
;
2184 /* thread spawned, put it on the list */
2185 spin_lock(&cifs_tcp_ses_lock
);
2186 list_add(&tcp_ses
->tcp_ses_list
, &cifs_tcp_ses_list
);
2187 spin_unlock(&cifs_tcp_ses_lock
);
2189 cifs_fscache_get_client_cookie(tcp_ses
);
2191 /* queue echo request delayed work */
2192 queue_delayed_work(cifsiod_wq
, &tcp_ses
->echo
, SMB_ECHO_INTERVAL
);
2196 out_err_crypto_release
:
2197 cifs_crypto_shash_release(tcp_ses
);
2199 put_net(cifs_net_ns(tcp_ses
));
2203 if (!IS_ERR(tcp_ses
->hostname
))
2204 kfree(tcp_ses
->hostname
);
2205 if (tcp_ses
->ssocket
)
2206 sock_release(tcp_ses
->ssocket
);
2212 static int match_session(struct cifs_ses
*ses
, struct smb_vol
*vol
)
2214 switch (ses
->server
->secType
) {
2216 if (!uid_eq(vol
->cred_uid
, ses
->cred_uid
))
2220 /* NULL username means anonymous session */
2221 if (ses
->user_name
== NULL
) {
2227 /* anything else takes username/password */
2228 if (strncmp(ses
->user_name
,
2229 vol
->username
? vol
->username
: "",
2232 if (strlen(vol
->username
) != 0 &&
2233 ses
->password
!= NULL
&&
2234 strncmp(ses
->password
,
2235 vol
->password
? vol
->password
: "",
2242 static struct cifs_ses
*
2243 cifs_find_smb_ses(struct TCP_Server_Info
*server
, struct smb_vol
*vol
)
2245 struct cifs_ses
*ses
;
2247 spin_lock(&cifs_tcp_ses_lock
);
2248 list_for_each_entry(ses
, &server
->smb_ses_list
, smb_ses_list
) {
2249 if (!match_session(ses
, vol
))
2252 spin_unlock(&cifs_tcp_ses_lock
);
2255 spin_unlock(&cifs_tcp_ses_lock
);
2260 cifs_put_smb_ses(struct cifs_ses
*ses
)
2263 struct TCP_Server_Info
*server
= ses
->server
;
2265 cifs_dbg(FYI
, "%s: ses_count=%d\n", __func__
, ses
->ses_count
);
2266 spin_lock(&cifs_tcp_ses_lock
);
2267 if (--ses
->ses_count
> 0) {
2268 spin_unlock(&cifs_tcp_ses_lock
);
2272 list_del_init(&ses
->smb_ses_list
);
2273 spin_unlock(&cifs_tcp_ses_lock
);
2275 if (ses
->status
== CifsGood
&& server
->ops
->logoff
) {
2277 server
->ops
->logoff(xid
, ses
);
2281 cifs_put_tcp_session(server
);
2286 /* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */
2287 #define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1)
2289 /* Populate username and pw fields from keyring if possible */
2291 cifs_set_cifscreds(struct smb_vol
*vol
, struct cifs_ses
*ses
)
2294 char *desc
, *delim
, *payload
;
2297 struct TCP_Server_Info
*server
= ses
->server
;
2298 struct sockaddr_in
*sa
;
2299 struct sockaddr_in6
*sa6
;
2300 struct user_key_payload
*upayload
;
2302 desc
= kmalloc(CIFSCREDS_DESC_SIZE
, GFP_KERNEL
);
2306 /* try to find an address key first */
2307 switch (server
->dstaddr
.ss_family
) {
2309 sa
= (struct sockaddr_in
*)&server
->dstaddr
;
2310 sprintf(desc
, "cifs:a:%pI4", &sa
->sin_addr
.s_addr
);
2313 sa6
= (struct sockaddr_in6
*)&server
->dstaddr
;
2314 sprintf(desc
, "cifs:a:%pI6c", &sa6
->sin6_addr
.s6_addr
);
2317 cifs_dbg(FYI
, "Bad ss_family (%hu)\n",
2318 server
->dstaddr
.ss_family
);
2323 cifs_dbg(FYI
, "%s: desc=%s\n", __func__
, desc
);
2324 key
= request_key(&key_type_logon
, desc
, "");
2326 if (!ses
->domainName
) {
2327 cifs_dbg(FYI
, "domainName is NULL\n");
2332 /* didn't work, try to find a domain key */
2333 sprintf(desc
, "cifs:d:%s", ses
->domainName
);
2334 cifs_dbg(FYI
, "%s: desc=%s\n", __func__
, desc
);
2335 key
= request_key(&key_type_logon
, desc
, "");
2342 down_read(&key
->sem
);
2343 upayload
= key
->payload
.data
;
2344 if (IS_ERR_OR_NULL(upayload
)) {
2345 rc
= upayload
? PTR_ERR(upayload
) : -EINVAL
;
2349 /* find first : in payload */
2350 payload
= (char *)upayload
->data
;
2351 delim
= strnchr(payload
, upayload
->datalen
, ':');
2352 cifs_dbg(FYI
, "payload=%s\n", payload
);
2354 cifs_dbg(FYI
, "Unable to find ':' in payload (datalen=%d)\n",
2360 len
= delim
- payload
;
2361 if (len
> MAX_USERNAME_SIZE
|| len
<= 0) {
2362 cifs_dbg(FYI
, "Bad value from username search (len=%zd)\n",
2368 vol
->username
= kstrndup(payload
, len
, GFP_KERNEL
);
2369 if (!vol
->username
) {
2370 cifs_dbg(FYI
, "Unable to allocate %zd bytes for username\n",
2375 cifs_dbg(FYI
, "%s: username=%s\n", __func__
, vol
->username
);
2377 len
= key
->datalen
- (len
+ 1);
2378 if (len
> MAX_PASSWORD_SIZE
|| len
<= 0) {
2379 cifs_dbg(FYI
, "Bad len for password search (len=%zd)\n", len
);
2381 kfree(vol
->username
);
2382 vol
->username
= NULL
;
2387 vol
->password
= kstrndup(delim
, len
, GFP_KERNEL
);
2388 if (!vol
->password
) {
2389 cifs_dbg(FYI
, "Unable to allocate %zd bytes for password\n",
2392 kfree(vol
->username
);
2393 vol
->username
= NULL
;
2402 cifs_dbg(FYI
, "%s: returning %d\n", __func__
, rc
);
2405 #else /* ! CONFIG_KEYS */
2407 cifs_set_cifscreds(struct smb_vol
*vol
__attribute__((unused
)),
2408 struct cifs_ses
*ses
__attribute__((unused
)))
2412 #endif /* CONFIG_KEYS */
2414 static struct cifs_ses
*
2415 cifs_get_smb_ses(struct TCP_Server_Info
*server
, struct smb_vol
*volume_info
)
2419 struct cifs_ses
*ses
;
2420 struct sockaddr_in
*addr
= (struct sockaddr_in
*)&server
->dstaddr
;
2421 struct sockaddr_in6
*addr6
= (struct sockaddr_in6
*)&server
->dstaddr
;
2425 ses
= cifs_find_smb_ses(server
, volume_info
);
2427 cifs_dbg(FYI
, "Existing smb sess found (status=%d)\n",
2430 mutex_lock(&ses
->session_mutex
);
2431 rc
= cifs_negotiate_protocol(xid
, ses
);
2433 mutex_unlock(&ses
->session_mutex
);
2434 /* problem -- put our ses reference */
2435 cifs_put_smb_ses(ses
);
2439 if (ses
->need_reconnect
) {
2440 cifs_dbg(FYI
, "Session needs reconnect\n");
2441 rc
= cifs_setup_session(xid
, ses
,
2442 volume_info
->local_nls
);
2444 mutex_unlock(&ses
->session_mutex
);
2445 /* problem -- put our reference */
2446 cifs_put_smb_ses(ses
);
2451 mutex_unlock(&ses
->session_mutex
);
2453 /* existing SMB ses has a server reference already */
2454 cifs_put_tcp_session(server
);
2459 cifs_dbg(FYI
, "Existing smb sess not found\n");
2460 ses
= sesInfoAlloc();
2464 /* new SMB session uses our server ref */
2465 ses
->server
= server
;
2466 if (server
->dstaddr
.ss_family
== AF_INET6
)
2467 sprintf(ses
->serverName
, "%pI6", &addr6
->sin6_addr
);
2469 sprintf(ses
->serverName
, "%pI4", &addr
->sin_addr
);
2471 if (volume_info
->username
) {
2472 ses
->user_name
= kstrdup(volume_info
->username
, GFP_KERNEL
);
2473 if (!ses
->user_name
)
2477 /* volume_info->password freed at unmount */
2478 if (volume_info
->password
) {
2479 ses
->password
= kstrdup(volume_info
->password
, GFP_KERNEL
);
2483 if (volume_info
->domainname
) {
2484 ses
->domainName
= kstrdup(volume_info
->domainname
, GFP_KERNEL
);
2485 if (!ses
->domainName
)
2488 ses
->cred_uid
= volume_info
->cred_uid
;
2489 ses
->linux_uid
= volume_info
->linux_uid
;
2491 ses
->overrideSecFlg
= volume_info
->secFlg
;
2493 mutex_lock(&ses
->session_mutex
);
2494 rc
= cifs_negotiate_protocol(xid
, ses
);
2496 rc
= cifs_setup_session(xid
, ses
, volume_info
->local_nls
);
2497 mutex_unlock(&ses
->session_mutex
);
2501 /* success, put it on the list */
2502 spin_lock(&cifs_tcp_ses_lock
);
2503 list_add(&ses
->smb_ses_list
, &server
->smb_ses_list
);
2504 spin_unlock(&cifs_tcp_ses_lock
);
2515 static int match_tcon(struct cifs_tcon
*tcon
, const char *unc
)
2517 if (tcon
->tidStatus
== CifsExiting
)
2519 if (strncmp(tcon
->treeName
, unc
, MAX_TREE_SIZE
))
2524 static struct cifs_tcon
*
2525 cifs_find_tcon(struct cifs_ses
*ses
, const char *unc
)
2527 struct list_head
*tmp
;
2528 struct cifs_tcon
*tcon
;
2530 spin_lock(&cifs_tcp_ses_lock
);
2531 list_for_each(tmp
, &ses
->tcon_list
) {
2532 tcon
= list_entry(tmp
, struct cifs_tcon
, tcon_list
);
2533 if (!match_tcon(tcon
, unc
))
2536 spin_unlock(&cifs_tcp_ses_lock
);
2539 spin_unlock(&cifs_tcp_ses_lock
);
2544 cifs_put_tcon(struct cifs_tcon
*tcon
)
2547 struct cifs_ses
*ses
= tcon
->ses
;
2549 cifs_dbg(FYI
, "%s: tc_count=%d\n", __func__
, tcon
->tc_count
);
2550 spin_lock(&cifs_tcp_ses_lock
);
2551 if (--tcon
->tc_count
> 0) {
2552 spin_unlock(&cifs_tcp_ses_lock
);
2556 list_del_init(&tcon
->tcon_list
);
2557 spin_unlock(&cifs_tcp_ses_lock
);
2560 if (ses
->server
->ops
->tree_disconnect
)
2561 ses
->server
->ops
->tree_disconnect(xid
, tcon
);
2564 cifs_fscache_release_super_cookie(tcon
);
2566 cifs_put_smb_ses(ses
);
2569 static struct cifs_tcon
*
2570 cifs_get_tcon(struct cifs_ses
*ses
, struct smb_vol
*volume_info
)
2573 struct cifs_tcon
*tcon
;
2575 tcon
= cifs_find_tcon(ses
, volume_info
->UNC
);
2577 cifs_dbg(FYI
, "Found match on UNC path\n");
2578 /* existing tcon already has a reference */
2579 cifs_put_smb_ses(ses
);
2580 if (tcon
->seal
!= volume_info
->seal
)
2581 cifs_dbg(VFS
, "transport encryption setting conflicts with existing tid\n");
2585 if (!ses
->server
->ops
->tree_connect
) {
2590 tcon
= tconInfoAlloc();
2597 if (volume_info
->password
) {
2598 tcon
->password
= kstrdup(volume_info
->password
, GFP_KERNEL
);
2599 if (!tcon
->password
) {
2606 * BB Do we need to wrap session_mutex around this TCon call and Unix
2607 * SetFS as we do on SessSetup and reconnect?
2610 rc
= ses
->server
->ops
->tree_connect(xid
, ses
, volume_info
->UNC
, tcon
,
2611 volume_info
->local_nls
);
2613 cifs_dbg(FYI
, "Tcon rc = %d\n", rc
);
2617 if (volume_info
->nodfs
) {
2618 tcon
->Flags
&= ~SMB_SHARE_IS_IN_DFS
;
2619 cifs_dbg(FYI
, "DFS disabled (%d)\n", tcon
->Flags
);
2621 tcon
->seal
= volume_info
->seal
;
2623 * We can have only one retry value for a connection to a share so for
2624 * resources mounted more than once to the same server share the last
2625 * value passed in for the retry flag is used.
2627 tcon
->retry
= volume_info
->retry
;
2628 tcon
->nocase
= volume_info
->nocase
;
2629 tcon
->local_lease
= volume_info
->local_lease
;
2630 INIT_LIST_HEAD(&tcon
->pending_opens
);
2632 spin_lock(&cifs_tcp_ses_lock
);
2633 list_add(&tcon
->tcon_list
, &ses
->tcon_list
);
2634 spin_unlock(&cifs_tcp_ses_lock
);
2636 cifs_fscache_get_super_cookie(tcon
);
2646 cifs_put_tlink(struct tcon_link
*tlink
)
2648 if (!tlink
|| IS_ERR(tlink
))
2651 if (!atomic_dec_and_test(&tlink
->tl_count
) ||
2652 test_bit(TCON_LINK_IN_TREE
, &tlink
->tl_flags
)) {
2653 tlink
->tl_time
= jiffies
;
2657 if (!IS_ERR(tlink_tcon(tlink
)))
2658 cifs_put_tcon(tlink_tcon(tlink
));
2663 static inline struct tcon_link
*
2664 cifs_sb_master_tlink(struct cifs_sb_info
*cifs_sb
)
2666 return cifs_sb
->master_tlink
;
2670 compare_mount_options(struct super_block
*sb
, struct cifs_mnt_data
*mnt_data
)
2672 struct cifs_sb_info
*old
= CIFS_SB(sb
);
2673 struct cifs_sb_info
*new = mnt_data
->cifs_sb
;
2675 if ((sb
->s_flags
& CIFS_MS_MASK
) != (mnt_data
->flags
& CIFS_MS_MASK
))
2678 if ((old
->mnt_cifs_flags
& CIFS_MOUNT_MASK
) !=
2679 (new->mnt_cifs_flags
& CIFS_MOUNT_MASK
))
2683 * We want to share sb only if we don't specify an r/wsize or
2684 * specified r/wsize is greater than or equal to existing one.
2686 if (new->wsize
&& new->wsize
< old
->wsize
)
2689 if (new->rsize
&& new->rsize
< old
->rsize
)
2692 if (!uid_eq(old
->mnt_uid
, new->mnt_uid
) || !gid_eq(old
->mnt_gid
, new->mnt_gid
))
2695 if (old
->mnt_file_mode
!= new->mnt_file_mode
||
2696 old
->mnt_dir_mode
!= new->mnt_dir_mode
)
2699 if (strcmp(old
->local_nls
->charset
, new->local_nls
->charset
))
2702 if (old
->actimeo
!= new->actimeo
)
2709 cifs_match_super(struct super_block
*sb
, void *data
)
2711 struct cifs_mnt_data
*mnt_data
= (struct cifs_mnt_data
*)data
;
2712 struct smb_vol
*volume_info
;
2713 struct cifs_sb_info
*cifs_sb
;
2714 struct TCP_Server_Info
*tcp_srv
;
2715 struct cifs_ses
*ses
;
2716 struct cifs_tcon
*tcon
;
2717 struct tcon_link
*tlink
;
2720 spin_lock(&cifs_tcp_ses_lock
);
2721 cifs_sb
= CIFS_SB(sb
);
2722 tlink
= cifs_get_tlink(cifs_sb_master_tlink(cifs_sb
));
2723 if (IS_ERR(tlink
)) {
2724 spin_unlock(&cifs_tcp_ses_lock
);
2727 tcon
= tlink_tcon(tlink
);
2729 tcp_srv
= ses
->server
;
2731 volume_info
= mnt_data
->vol
;
2733 if (!match_server(tcp_srv
, volume_info
) ||
2734 !match_session(ses
, volume_info
) ||
2735 !match_tcon(tcon
, volume_info
->UNC
)) {
2740 rc
= compare_mount_options(sb
, mnt_data
);
2742 spin_unlock(&cifs_tcp_ses_lock
);
2743 cifs_put_tlink(tlink
);
2748 get_dfs_path(const unsigned int xid
, struct cifs_ses
*ses
, const char *old_path
,
2749 const struct nls_table
*nls_codepage
, unsigned int *num_referrals
,
2750 struct dfs_info3_param
**referrals
, int remap
)
2755 if (!ses
->server
->ops
->tree_connect
|| !ses
->server
->ops
->get_dfs_refer
)
2761 if (ses
->ipc_tid
== 0) {
2762 temp_unc
= kmalloc(2 /* for slashes */ +
2763 strnlen(ses
->serverName
, SERVER_NAME_LEN_WITH_NULL
* 2)
2764 + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL
);
2765 if (temp_unc
== NULL
)
2769 strcpy(temp_unc
+ 2, ses
->serverName
);
2770 strcpy(temp_unc
+ 2 + strlen(ses
->serverName
), "\\IPC$");
2771 rc
= ses
->server
->ops
->tree_connect(xid
, ses
, temp_unc
, NULL
,
2773 cifs_dbg(FYI
, "Tcon rc = %d ipc_tid = %d\n", rc
, ses
->ipc_tid
);
2777 rc
= ses
->server
->ops
->get_dfs_refer(xid
, ses
, old_path
,
2778 referrals
, num_referrals
,
2779 nls_codepage
, remap
);
2781 * BB - map targetUNCs to dfs_info3 structures, here or in
2782 * ses->server->ops->get_dfs_refer.
2788 #ifdef CONFIG_DEBUG_LOCK_ALLOC
2789 static struct lock_class_key cifs_key
[2];
2790 static struct lock_class_key cifs_slock_key
[2];
2793 cifs_reclassify_socket4(struct socket
*sock
)
2795 struct sock
*sk
= sock
->sk
;
2796 BUG_ON(sock_owned_by_user(sk
));
2797 sock_lock_init_class_and_name(sk
, "slock-AF_INET-CIFS",
2798 &cifs_slock_key
[0], "sk_lock-AF_INET-CIFS", &cifs_key
[0]);
2802 cifs_reclassify_socket6(struct socket
*sock
)
2804 struct sock
*sk
= sock
->sk
;
2805 BUG_ON(sock_owned_by_user(sk
));
2806 sock_lock_init_class_and_name(sk
, "slock-AF_INET6-CIFS",
2807 &cifs_slock_key
[1], "sk_lock-AF_INET6-CIFS", &cifs_key
[1]);
2811 cifs_reclassify_socket4(struct socket
*sock
)
2816 cifs_reclassify_socket6(struct socket
*sock
)
2821 /* See RFC1001 section 14 on representation of Netbios names */
2822 static void rfc1002mangle(char *target
, char *source
, unsigned int length
)
2826 for (i
= 0, j
= 0; i
< (length
); i
++) {
2827 /* mask a nibble at a time and encode */
2828 target
[j
] = 'A' + (0x0F & (source
[i
] >> 4));
2829 target
[j
+1] = 'A' + (0x0F & source
[i
]);
2836 bind_socket(struct TCP_Server_Info
*server
)
2839 if (server
->srcaddr
.ss_family
!= AF_UNSPEC
) {
2840 /* Bind to the specified local IP address */
2841 struct socket
*socket
= server
->ssocket
;
2842 rc
= socket
->ops
->bind(socket
,
2843 (struct sockaddr
*) &server
->srcaddr
,
2844 sizeof(server
->srcaddr
));
2846 struct sockaddr_in
*saddr4
;
2847 struct sockaddr_in6
*saddr6
;
2848 saddr4
= (struct sockaddr_in
*)&server
->srcaddr
;
2849 saddr6
= (struct sockaddr_in6
*)&server
->srcaddr
;
2850 if (saddr6
->sin6_family
== AF_INET6
)
2851 cifs_dbg(VFS
, "Failed to bind to: %pI6c, error: %d\n",
2852 &saddr6
->sin6_addr
, rc
);
2854 cifs_dbg(VFS
, "Failed to bind to: %pI4, error: %d\n",
2855 &saddr4
->sin_addr
.s_addr
, rc
);
2862 ip_rfc1001_connect(struct TCP_Server_Info
*server
)
2866 * some servers require RFC1001 sessinit before sending
2867 * negprot - BB check reconnection in case where second
2868 * sessinit is sent but no second negprot
2870 struct rfc1002_session_packet
*ses_init_buf
;
2871 struct smb_hdr
*smb_buf
;
2872 ses_init_buf
= kzalloc(sizeof(struct rfc1002_session_packet
),
2875 ses_init_buf
->trailer
.session_req
.called_len
= 32;
2877 if (server
->server_RFC1001_name
&&
2878 server
->server_RFC1001_name
[0] != 0)
2879 rfc1002mangle(ses_init_buf
->trailer
.
2880 session_req
.called_name
,
2881 server
->server_RFC1001_name
,
2882 RFC1001_NAME_LEN_WITH_NULL
);
2884 rfc1002mangle(ses_init_buf
->trailer
.
2885 session_req
.called_name
,
2886 DEFAULT_CIFS_CALLED_NAME
,
2887 RFC1001_NAME_LEN_WITH_NULL
);
2889 ses_init_buf
->trailer
.session_req
.calling_len
= 32;
2892 * calling name ends in null (byte 16) from old smb
2895 if (server
->workstation_RFC1001_name
&&
2896 server
->workstation_RFC1001_name
[0] != 0)
2897 rfc1002mangle(ses_init_buf
->trailer
.
2898 session_req
.calling_name
,
2899 server
->workstation_RFC1001_name
,
2900 RFC1001_NAME_LEN_WITH_NULL
);
2902 rfc1002mangle(ses_init_buf
->trailer
.
2903 session_req
.calling_name
,
2905 RFC1001_NAME_LEN_WITH_NULL
);
2907 ses_init_buf
->trailer
.session_req
.scope1
= 0;
2908 ses_init_buf
->trailer
.session_req
.scope2
= 0;
2909 smb_buf
= (struct smb_hdr
*)ses_init_buf
;
2911 /* sizeof RFC1002_SESSION_REQUEST with no scope */
2912 smb_buf
->smb_buf_length
= cpu_to_be32(0x81000044);
2913 rc
= smb_send(server
, smb_buf
, 0x44);
2914 kfree(ses_init_buf
);
2916 * RFC1001 layer in at least one server
2917 * requires very short break before negprot
2918 * presumably because not expecting negprot
2919 * to follow so fast. This is a simple
2920 * solution that works without
2921 * complicating the code and causes no
2922 * significant slowing down on mount
2925 usleep_range(1000, 2000);
2928 * else the negprot may still work without this
2929 * even though malloc failed
2936 generic_ip_connect(struct TCP_Server_Info
*server
)
2941 struct socket
*socket
= server
->ssocket
;
2942 struct sockaddr
*saddr
;
2944 saddr
= (struct sockaddr
*) &server
->dstaddr
;
2946 if (server
->dstaddr
.ss_family
== AF_INET6
) {
2947 sport
= ((struct sockaddr_in6
*) saddr
)->sin6_port
;
2948 slen
= sizeof(struct sockaddr_in6
);
2951 sport
= ((struct sockaddr_in
*) saddr
)->sin_port
;
2952 slen
= sizeof(struct sockaddr_in
);
2956 if (socket
== NULL
) {
2957 rc
= __sock_create(cifs_net_ns(server
), sfamily
, SOCK_STREAM
,
2958 IPPROTO_TCP
, &socket
, 1);
2960 cifs_dbg(VFS
, "Error %d creating socket\n", rc
);
2961 server
->ssocket
= NULL
;
2965 /* BB other socket options to set KEEPALIVE, NODELAY? */
2966 cifs_dbg(FYI
, "Socket created\n");
2967 server
->ssocket
= socket
;
2968 socket
->sk
->sk_allocation
= GFP_NOFS
;
2969 if (sfamily
== AF_INET6
)
2970 cifs_reclassify_socket6(socket
);
2972 cifs_reclassify_socket4(socket
);
2975 rc
= bind_socket(server
);
2980 * Eventually check for other socket options to change from
2981 * the default. sock_setsockopt not used because it expects
2984 socket
->sk
->sk_rcvtimeo
= 7 * HZ
;
2985 socket
->sk
->sk_sndtimeo
= 5 * HZ
;
2987 /* make the bufsizes depend on wsize/rsize and max requests */
2988 if (server
->noautotune
) {
2989 if (socket
->sk
->sk_sndbuf
< (200 * 1024))
2990 socket
->sk
->sk_sndbuf
= 200 * 1024;
2991 if (socket
->sk
->sk_rcvbuf
< (140 * 1024))
2992 socket
->sk
->sk_rcvbuf
= 140 * 1024;
2995 if (server
->tcp_nodelay
) {
2997 rc
= kernel_setsockopt(socket
, SOL_TCP
, TCP_NODELAY
,
2998 (char *)&val
, sizeof(val
));
3000 cifs_dbg(FYI
, "set TCP_NODELAY socket option error %d\n",
3004 cifs_dbg(FYI
, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n",
3005 socket
->sk
->sk_sndbuf
,
3006 socket
->sk
->sk_rcvbuf
, socket
->sk
->sk_rcvtimeo
);
3008 rc
= socket
->ops
->connect(socket
, saddr
, slen
, 0);
3010 cifs_dbg(FYI
, "Error %d connecting to server\n", rc
);
3011 sock_release(socket
);
3012 server
->ssocket
= NULL
;
3016 if (sport
== htons(RFC1001_PORT
))
3017 rc
= ip_rfc1001_connect(server
);
3023 ip_connect(struct TCP_Server_Info
*server
)
3026 struct sockaddr_in6
*addr6
= (struct sockaddr_in6
*)&server
->dstaddr
;
3027 struct sockaddr_in
*addr
= (struct sockaddr_in
*)&server
->dstaddr
;
3029 if (server
->dstaddr
.ss_family
== AF_INET6
)
3030 sport
= &addr6
->sin6_port
;
3032 sport
= &addr
->sin_port
;
3037 /* try with 445 port at first */
3038 *sport
= htons(CIFS_PORT
);
3040 rc
= generic_ip_connect(server
);
3044 /* if it failed, try with 139 port */
3045 *sport
= htons(RFC1001_PORT
);
3048 return generic_ip_connect(server
);
3051 void reset_cifs_unix_caps(unsigned int xid
, struct cifs_tcon
*tcon
,
3052 struct cifs_sb_info
*cifs_sb
, struct smb_vol
*vol_info
)
3054 /* if we are reconnecting then should we check to see if
3055 * any requested capabilities changed locally e.g. via
3056 * remount but we can not do much about it here
3057 * if they have (even if we could detect it by the following)
3058 * Perhaps we could add a backpointer to array of sb from tcon
3059 * or if we change to make all sb to same share the same
3060 * sb as NFS - then we only have one backpointer to sb.
3061 * What if we wanted to mount the server share twice once with
3062 * and once without posixacls or posix paths? */
3063 __u64 saved_cap
= le64_to_cpu(tcon
->fsUnixInfo
.Capability
);
3065 if (vol_info
&& vol_info
->no_linux_ext
) {
3066 tcon
->fsUnixInfo
.Capability
= 0;
3067 tcon
->unix_ext
= 0; /* Unix Extensions disabled */
3068 cifs_dbg(FYI
, "Linux protocol extensions disabled\n");
3070 } else if (vol_info
)
3071 tcon
->unix_ext
= 1; /* Unix Extensions supported */
3073 if (tcon
->unix_ext
== 0) {
3074 cifs_dbg(FYI
, "Unix extensions disabled so not set on reconnect\n");
3078 if (!CIFSSMBQFSUnixInfo(xid
, tcon
)) {
3079 __u64 cap
= le64_to_cpu(tcon
->fsUnixInfo
.Capability
);
3080 cifs_dbg(FYI
, "unix caps which server supports %lld\n", cap
);
3081 /* check for reconnect case in which we do not
3082 want to change the mount behavior if we can avoid it */
3083 if (vol_info
== NULL
) {
3084 /* turn off POSIX ACL and PATHNAMES if not set
3085 originally at mount time */
3086 if ((saved_cap
& CIFS_UNIX_POSIX_ACL_CAP
) == 0)
3087 cap
&= ~CIFS_UNIX_POSIX_ACL_CAP
;
3088 if ((saved_cap
& CIFS_UNIX_POSIX_PATHNAMES_CAP
) == 0) {
3089 if (cap
& CIFS_UNIX_POSIX_PATHNAMES_CAP
)
3090 cifs_dbg(VFS
, "POSIXPATH support change\n");
3091 cap
&= ~CIFS_UNIX_POSIX_PATHNAMES_CAP
;
3092 } else if ((cap
& CIFS_UNIX_POSIX_PATHNAMES_CAP
) == 0) {
3093 cifs_dbg(VFS
, "possible reconnect error\n");
3094 cifs_dbg(VFS
, "server disabled POSIX path support\n");
3098 if (cap
& CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP
)
3099 cifs_dbg(VFS
, "per-share encryption not supported yet\n");
3101 cap
&= CIFS_UNIX_CAP_MASK
;
3102 if (vol_info
&& vol_info
->no_psx_acl
)
3103 cap
&= ~CIFS_UNIX_POSIX_ACL_CAP
;
3104 else if (CIFS_UNIX_POSIX_ACL_CAP
& cap
) {
3105 cifs_dbg(FYI
, "negotiated posix acl support\n");
3107 cifs_sb
->mnt_cifs_flags
|=
3108 CIFS_MOUNT_POSIXACL
;
3111 if (vol_info
&& vol_info
->posix_paths
== 0)
3112 cap
&= ~CIFS_UNIX_POSIX_PATHNAMES_CAP
;
3113 else if (cap
& CIFS_UNIX_POSIX_PATHNAMES_CAP
) {
3114 cifs_dbg(FYI
, "negotiate posix pathnames\n");
3116 cifs_sb
->mnt_cifs_flags
|=
3117 CIFS_MOUNT_POSIX_PATHS
;
3120 cifs_dbg(FYI
, "Negotiate caps 0x%x\n", (int)cap
);
3121 #ifdef CONFIG_CIFS_DEBUG2
3122 if (cap
& CIFS_UNIX_FCNTL_CAP
)
3123 cifs_dbg(FYI
, "FCNTL cap\n");
3124 if (cap
& CIFS_UNIX_EXTATTR_CAP
)
3125 cifs_dbg(FYI
, "EXTATTR cap\n");
3126 if (cap
& CIFS_UNIX_POSIX_PATHNAMES_CAP
)
3127 cifs_dbg(FYI
, "POSIX path cap\n");
3128 if (cap
& CIFS_UNIX_XATTR_CAP
)
3129 cifs_dbg(FYI
, "XATTR cap\n");
3130 if (cap
& CIFS_UNIX_POSIX_ACL_CAP
)
3131 cifs_dbg(FYI
, "POSIX ACL cap\n");
3132 if (cap
& CIFS_UNIX_LARGE_READ_CAP
)
3133 cifs_dbg(FYI
, "very large read cap\n");
3134 if (cap
& CIFS_UNIX_LARGE_WRITE_CAP
)
3135 cifs_dbg(FYI
, "very large write cap\n");
3136 if (cap
& CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP
)
3137 cifs_dbg(FYI
, "transport encryption cap\n");
3138 if (cap
& CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP
)
3139 cifs_dbg(FYI
, "mandatory transport encryption cap\n");
3140 #endif /* CIFS_DEBUG2 */
3141 if (CIFSSMBSetFSUnixInfo(xid
, tcon
, cap
)) {
3142 if (vol_info
== NULL
) {
3143 cifs_dbg(FYI
, "resetting capabilities failed\n");
3145 cifs_dbg(VFS
, "Negotiating Unix capabilities with the server failed. Consider mounting with the Unix Extensions disabled if problems are found by specifying the nounix mount option.\n");
3151 void cifs_setup_cifs_sb(struct smb_vol
*pvolume_info
,
3152 struct cifs_sb_info
*cifs_sb
)
3154 INIT_DELAYED_WORK(&cifs_sb
->prune_tlinks
, cifs_prune_tlinks
);
3156 spin_lock_init(&cifs_sb
->tlink_tree_lock
);
3157 cifs_sb
->tlink_tree
= RB_ROOT
;
3160 * Temporarily set r/wsize for matching superblock. If we end up using
3161 * new sb then client will later negotiate it downward if needed.
3163 cifs_sb
->rsize
= pvolume_info
->rsize
;
3164 cifs_sb
->wsize
= pvolume_info
->wsize
;
3166 cifs_sb
->mnt_uid
= pvolume_info
->linux_uid
;
3167 cifs_sb
->mnt_gid
= pvolume_info
->linux_gid
;
3168 cifs_sb
->mnt_file_mode
= pvolume_info
->file_mode
;
3169 cifs_sb
->mnt_dir_mode
= pvolume_info
->dir_mode
;
3170 cifs_dbg(FYI
, "file mode: 0x%hx dir mode: 0x%hx\n",
3171 cifs_sb
->mnt_file_mode
, cifs_sb
->mnt_dir_mode
);
3173 cifs_sb
->actimeo
= pvolume_info
->actimeo
;
3174 cifs_sb
->local_nls
= pvolume_info
->local_nls
;
3176 if (pvolume_info
->noperm
)
3177 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NO_PERM
;
3178 if (pvolume_info
->setuids
)
3179 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_SET_UID
;
3180 if (pvolume_info
->server_ino
)
3181 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_SERVER_INUM
;
3182 if (pvolume_info
->remap
)
3183 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_MAP_SPECIAL_CHR
;
3184 if (pvolume_info
->no_xattr
)
3185 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NO_XATTR
;
3186 if (pvolume_info
->sfu_emul
)
3187 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_UNX_EMUL
;
3188 if (pvolume_info
->nobrl
)
3189 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NO_BRL
;
3190 if (pvolume_info
->nostrictsync
)
3191 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NOSSYNC
;
3192 if (pvolume_info
->mand_lock
)
3193 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NOPOSIXBRL
;
3194 if (pvolume_info
->rwpidforward
)
3195 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_RWPIDFORWARD
;
3196 if (pvolume_info
->cifs_acl
)
3197 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_CIFS_ACL
;
3198 if (pvolume_info
->backupuid_specified
) {
3199 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_CIFS_BACKUPUID
;
3200 cifs_sb
->mnt_backupuid
= pvolume_info
->backupuid
;
3202 if (pvolume_info
->backupgid_specified
) {
3203 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_CIFS_BACKUPGID
;
3204 cifs_sb
->mnt_backupgid
= pvolume_info
->backupgid
;
3206 if (pvolume_info
->override_uid
)
3207 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_OVERR_UID
;
3208 if (pvolume_info
->override_gid
)
3209 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_OVERR_GID
;
3210 if (pvolume_info
->dynperm
)
3211 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_DYNPERM
;
3212 if (pvolume_info
->fsc
)
3213 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_FSCACHE
;
3214 if (pvolume_info
->multiuser
)
3215 cifs_sb
->mnt_cifs_flags
|= (CIFS_MOUNT_MULTIUSER
|
3216 CIFS_MOUNT_NO_PERM
);
3217 if (pvolume_info
->strict_io
)
3218 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_STRICT_IO
;
3219 if (pvolume_info
->direct_io
) {
3220 cifs_dbg(FYI
, "mounting share using direct i/o\n");
3221 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_DIRECT_IO
;
3223 if (pvolume_info
->mfsymlinks
) {
3224 if (pvolume_info
->sfu_emul
) {
3225 cifs_dbg(VFS
, "mount option mfsymlinks ignored if sfu mount option is used\n");
3227 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_MF_SYMLINKS
;
3231 if ((pvolume_info
->cifs_acl
) && (pvolume_info
->dynperm
))
3232 cifs_dbg(VFS
, "mount option dynperm ignored if cifsacl mount option supported\n");
3236 cleanup_volume_info_contents(struct smb_vol
*volume_info
)
3238 kfree(volume_info
->username
);
3239 kzfree(volume_info
->password
);
3240 kfree(volume_info
->UNC
);
3241 kfree(volume_info
->domainname
);
3242 kfree(volume_info
->iocharset
);
3243 kfree(volume_info
->prepath
);
3247 cifs_cleanup_volume_info(struct smb_vol
*volume_info
)
3251 cleanup_volume_info_contents(volume_info
);
3256 #ifdef CONFIG_CIFS_DFS_UPCALL
3258 * cifs_build_path_to_root returns full path to root when we do not have an
3259 * exiting connection (tcon)
3262 build_unc_path_to_root(const struct smb_vol
*vol
,
3263 const struct cifs_sb_info
*cifs_sb
)
3265 char *full_path
, *pos
;
3266 unsigned int pplen
= vol
->prepath
? strlen(vol
->prepath
) + 1 : 0;
3267 unsigned int unc_len
= strnlen(vol
->UNC
, MAX_TREE_SIZE
+ 1);
3269 full_path
= kmalloc(unc_len
+ pplen
+ 1, GFP_KERNEL
);
3270 if (full_path
== NULL
)
3271 return ERR_PTR(-ENOMEM
);
3273 strncpy(full_path
, vol
->UNC
, unc_len
);
3274 pos
= full_path
+ unc_len
;
3277 *pos
++ = CIFS_DIR_SEP(cifs_sb
);
3278 strncpy(pos
, vol
->prepath
, pplen
);
3282 *pos
= '\0'; /* add trailing null */
3283 convert_delimiter(full_path
, CIFS_DIR_SEP(cifs_sb
));
3284 cifs_dbg(FYI
, "%s: full_path=%s\n", __func__
, full_path
);
3289 * Perform a dfs referral query for a share and (optionally) prefix
3291 * If a referral is found, cifs_sb->mountdata will be (re-)allocated
3292 * to a string containing updated options for the submount. Otherwise it
3293 * will be left untouched.
3295 * Returns the rc from get_dfs_path to the caller, which can be used to
3296 * determine whether there were referrals.
3299 expand_dfs_referral(const unsigned int xid
, struct cifs_ses
*ses
,
3300 struct smb_vol
*volume_info
, struct cifs_sb_info
*cifs_sb
,
3304 unsigned int num_referrals
= 0;
3305 struct dfs_info3_param
*referrals
= NULL
;
3306 char *full_path
= NULL
, *ref_path
= NULL
, *mdata
= NULL
;
3308 full_path
= build_unc_path_to_root(volume_info
, cifs_sb
);
3309 if (IS_ERR(full_path
))
3310 return PTR_ERR(full_path
);
3312 /* For DFS paths, skip the first '\' of the UNC */
3313 ref_path
= check_prefix
? full_path
+ 1 : volume_info
->UNC
+ 1;
3315 rc
= get_dfs_path(xid
, ses
, ref_path
, cifs_sb
->local_nls
,
3316 &num_referrals
, &referrals
,
3317 cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
);
3319 if (!rc
&& num_referrals
> 0) {
3320 char *fake_devname
= NULL
;
3322 mdata
= cifs_compose_mount_options(cifs_sb
->mountdata
,
3323 full_path
+ 1, referrals
,
3326 free_dfs_info_array(referrals
, num_referrals
);
3328 if (IS_ERR(mdata
)) {
3329 rc
= PTR_ERR(mdata
);
3332 cleanup_volume_info_contents(volume_info
);
3333 rc
= cifs_setup_volume_info(volume_info
, mdata
,
3336 kfree(fake_devname
);
3337 kfree(cifs_sb
->mountdata
);
3338 cifs_sb
->mountdata
= mdata
;
3346 cifs_setup_volume_info(struct smb_vol
*volume_info
, char *mount_data
,
3347 const char *devname
)
3351 if (cifs_parse_mount_options(mount_data
, devname
, volume_info
))
3354 if (volume_info
->nullauth
) {
3355 cifs_dbg(FYI
, "Anonymous login\n");
3356 kfree(volume_info
->username
);
3357 volume_info
->username
= NULL
;
3358 } else if (volume_info
->username
) {
3359 /* BB fixme parse for domain name here */
3360 cifs_dbg(FYI
, "Username: %s\n", volume_info
->username
);
3362 cifs_dbg(VFS
, "No username specified\n");
3363 /* In userspace mount helper we can get user name from alternate
3364 locations such as env variables and files on disk */
3368 /* this is needed for ASCII cp to Unicode converts */
3369 if (volume_info
->iocharset
== NULL
) {
3370 /* load_nls_default cannot return null */
3371 volume_info
->local_nls
= load_nls_default();
3373 volume_info
->local_nls
= load_nls(volume_info
->iocharset
);
3374 if (volume_info
->local_nls
== NULL
) {
3375 cifs_dbg(VFS
, "CIFS mount error: iocharset %s not found\n",
3376 volume_info
->iocharset
);
3385 cifs_get_volume_info(char *mount_data
, const char *devname
)
3388 struct smb_vol
*volume_info
;
3390 volume_info
= kmalloc(sizeof(struct smb_vol
), GFP_KERNEL
);
3392 return ERR_PTR(-ENOMEM
);
3394 rc
= cifs_setup_volume_info(volume_info
, mount_data
, devname
);
3396 cifs_cleanup_volume_info(volume_info
);
3397 volume_info
= ERR_PTR(rc
);
3404 cifs_mount(struct cifs_sb_info
*cifs_sb
, struct smb_vol
*volume_info
)
3408 struct cifs_ses
*ses
;
3409 struct cifs_tcon
*tcon
;
3410 struct TCP_Server_Info
*server
;
3412 struct tcon_link
*tlink
;
3413 #ifdef CONFIG_CIFS_DFS_UPCALL
3414 int referral_walks_count
= 0;
3417 rc
= bdi_setup_and_register(&cifs_sb
->bdi
, "cifs", BDI_CAP_MAP_COPY
);
3421 #ifdef CONFIG_CIFS_DFS_UPCALL
3423 /* cleanup activities if we're chasing a referral */
3424 if (referral_walks_count
) {
3426 cifs_put_tcon(tcon
);
3428 cifs_put_smb_ses(ses
);
3442 /* get a reference to a tcp session */
3443 server
= cifs_get_tcp_session(volume_info
);
3444 if (IS_ERR(server
)) {
3445 rc
= PTR_ERR(server
);
3446 bdi_destroy(&cifs_sb
->bdi
);
3450 /* get a reference to a SMB session */
3451 ses
= cifs_get_smb_ses(server
, volume_info
);
3455 goto mount_fail_check
;
3458 /* search for existing tcon to this server share */
3459 tcon
= cifs_get_tcon(ses
, volume_info
);
3463 goto remote_path_check
;
3466 /* tell server which Unix caps we support */
3467 if (cap_unix(tcon
->ses
)) {
3468 /* reset of caps checks mount to see if unix extensions
3469 disabled for just this mount */
3470 reset_cifs_unix_caps(xid
, tcon
, cifs_sb
, volume_info
);
3471 if ((tcon
->ses
->server
->tcpStatus
== CifsNeedReconnect
) &&
3472 (le64_to_cpu(tcon
->fsUnixInfo
.Capability
) &
3473 CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP
)) {
3475 goto mount_fail_check
;
3478 tcon
->unix_ext
= 0; /* server does not support them */
3480 /* do not care if a following call succeed - informational */
3481 if (!tcon
->ipc
&& server
->ops
->qfs_tcon
)
3482 server
->ops
->qfs_tcon(xid
, tcon
);
3484 cifs_sb
->wsize
= server
->ops
->negotiate_wsize(tcon
, volume_info
);
3485 cifs_sb
->rsize
= server
->ops
->negotiate_rsize(tcon
, volume_info
);
3487 /* tune readahead according to rsize */
3488 cifs_sb
->bdi
.ra_pages
= cifs_sb
->rsize
/ PAGE_CACHE_SIZE
;
3491 #ifdef CONFIG_CIFS_DFS_UPCALL
3493 * Perform an unconditional check for whether there are DFS
3494 * referrals for this path without prefix, to provide support
3495 * for DFS referrals from w2k8 servers which don't seem to respond
3496 * with PATH_NOT_COVERED to requests that include the prefix.
3497 * Chase the referral if found, otherwise continue normally.
3499 if (referral_walks_count
== 0) {
3500 int refrc
= expand_dfs_referral(xid
, ses
, volume_info
, cifs_sb
,
3503 referral_walks_count
++;
3504 goto try_mount_again
;
3509 /* check if a whole path is not remote */
3511 if (!server
->ops
->is_path_accessible
) {
3513 goto mount_fail_check
;
3516 * cifs_build_path_to_root works only when we have a valid tcon
3518 full_path
= cifs_build_path_to_root(volume_info
, cifs_sb
, tcon
);
3519 if (full_path
== NULL
) {
3521 goto mount_fail_check
;
3523 rc
= server
->ops
->is_path_accessible(xid
, tcon
, cifs_sb
,
3525 if (rc
!= 0 && rc
!= -EREMOTE
) {
3527 goto mount_fail_check
;
3532 /* get referral if needed */
3533 if (rc
== -EREMOTE
) {
3534 #ifdef CONFIG_CIFS_DFS_UPCALL
3535 if (referral_walks_count
> MAX_NESTED_LINKS
) {
3537 * BB: when we implement proper loop detection,
3538 * we will remove this check. But now we need it
3539 * to prevent an indefinite loop if 'DFS tree' is
3540 * misconfigured (i.e. has loops).
3543 goto mount_fail_check
;
3546 rc
= expand_dfs_referral(xid
, ses
, volume_info
, cifs_sb
, true);
3549 referral_walks_count
++;
3550 goto try_mount_again
;
3552 goto mount_fail_check
;
3553 #else /* No DFS support, return error on mount */
3559 goto mount_fail_check
;
3561 /* now, hang the tcon off of the superblock */
3562 tlink
= kzalloc(sizeof *tlink
, GFP_KERNEL
);
3563 if (tlink
== NULL
) {
3565 goto mount_fail_check
;
3568 tlink
->tl_uid
= ses
->linux_uid
;
3569 tlink
->tl_tcon
= tcon
;
3570 tlink
->tl_time
= jiffies
;
3571 set_bit(TCON_LINK_MASTER
, &tlink
->tl_flags
);
3572 set_bit(TCON_LINK_IN_TREE
, &tlink
->tl_flags
);
3574 cifs_sb
->master_tlink
= tlink
;
3575 spin_lock(&cifs_sb
->tlink_tree_lock
);
3576 tlink_rb_insert(&cifs_sb
->tlink_tree
, tlink
);
3577 spin_unlock(&cifs_sb
->tlink_tree_lock
);
3579 queue_delayed_work(cifsiod_wq
, &cifs_sb
->prune_tlinks
,
3583 /* on error free sesinfo and tcon struct if needed */
3585 /* If find_unc succeeded then rc == 0 so we can not end */
3586 /* up accidentally freeing someone elses tcon struct */
3588 cifs_put_tcon(tcon
);
3590 cifs_put_smb_ses(ses
);
3592 cifs_put_tcp_session(server
);
3593 bdi_destroy(&cifs_sb
->bdi
);
3602 * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon
3603 * pointer may be NULL.
3606 CIFSTCon(const unsigned int xid
, struct cifs_ses
*ses
,
3607 const char *tree
, struct cifs_tcon
*tcon
,
3608 const struct nls_table
*nls_codepage
)
3610 struct smb_hdr
*smb_buffer
;
3611 struct smb_hdr
*smb_buffer_response
;
3614 unsigned char *bcc_ptr
;
3617 __u16 bytes_left
, count
;
3622 smb_buffer
= cifs_buf_get();
3623 if (smb_buffer
== NULL
)
3626 smb_buffer_response
= smb_buffer
;
3628 header_assemble(smb_buffer
, SMB_COM_TREE_CONNECT_ANDX
,
3629 NULL
/*no tid */ , 4 /*wct */ );
3631 smb_buffer
->Mid
= get_next_mid(ses
->server
);
3632 smb_buffer
->Uid
= ses
->Suid
;
3633 pSMB
= (TCONX_REQ
*) smb_buffer
;
3634 pSMBr
= (TCONX_RSP
*) smb_buffer_response
;
3636 pSMB
->AndXCommand
= 0xFF;
3637 pSMB
->Flags
= cpu_to_le16(TCON_EXTENDED_SECINFO
);
3638 bcc_ptr
= &pSMB
->Password
[0];
3639 if (!tcon
|| (ses
->server
->sec_mode
& SECMODE_USER
)) {
3640 pSMB
->PasswordLength
= cpu_to_le16(1); /* minimum */
3641 *bcc_ptr
= 0; /* password is null byte */
3642 bcc_ptr
++; /* skip password */
3643 /* already aligned so no need to do it below */
3645 pSMB
->PasswordLength
= cpu_to_le16(CIFS_AUTH_RESP_SIZE
);
3646 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3647 specified as required (when that support is added to
3648 the vfs in the future) as only NTLM or the much
3649 weaker LANMAN (which we do not send by default) is accepted
3650 by Samba (not sure whether other servers allow
3651 NTLMv2 password here) */
3652 #ifdef CONFIG_CIFS_WEAK_PW_HASH
3653 if ((global_secflags
& CIFSSEC_MAY_LANMAN
) &&
3654 (ses
->server
->secType
== LANMAN
))
3655 calc_lanman_hash(tcon
->password
, ses
->server
->cryptkey
,
3656 ses
->server
->sec_mode
&
3657 SECMODE_PW_ENCRYPT
? true : false,
3660 #endif /* CIFS_WEAK_PW_HASH */
3661 rc
= SMBNTencrypt(tcon
->password
, ses
->server
->cryptkey
,
3662 bcc_ptr
, nls_codepage
);
3664 bcc_ptr
+= CIFS_AUTH_RESP_SIZE
;
3665 if (ses
->capabilities
& CAP_UNICODE
) {
3666 /* must align unicode strings */
3667 *bcc_ptr
= 0; /* null byte password */
3672 if (ses
->server
->sec_mode
&
3673 (SECMODE_SIGN_REQUIRED
| SECMODE_SIGN_ENABLED
))
3674 smb_buffer
->Flags2
|= SMBFLG2_SECURITY_SIGNATURE
;
3676 if (ses
->capabilities
& CAP_STATUS32
) {
3677 smb_buffer
->Flags2
|= SMBFLG2_ERR_STATUS
;
3679 if (ses
->capabilities
& CAP_DFS
) {
3680 smb_buffer
->Flags2
|= SMBFLG2_DFS
;
3682 if (ses
->capabilities
& CAP_UNICODE
) {
3683 smb_buffer
->Flags2
|= SMBFLG2_UNICODE
;
3685 cifs_strtoUTF16((__le16
*) bcc_ptr
, tree
,
3686 6 /* max utf8 char length in bytes */ *
3687 (/* server len*/ + 256 /* share len */), nls_codepage
);
3688 bcc_ptr
+= 2 * length
; /* convert num 16 bit words to bytes */
3689 bcc_ptr
+= 2; /* skip trailing null */
3690 } else { /* ASCII */
3691 strcpy(bcc_ptr
, tree
);
3692 bcc_ptr
+= strlen(tree
) + 1;
3694 strcpy(bcc_ptr
, "?????");
3695 bcc_ptr
+= strlen("?????");
3697 count
= bcc_ptr
- &pSMB
->Password
[0];
3698 pSMB
->hdr
.smb_buf_length
= cpu_to_be32(be32_to_cpu(
3699 pSMB
->hdr
.smb_buf_length
) + count
);
3700 pSMB
->ByteCount
= cpu_to_le16(count
);
3702 rc
= SendReceive(xid
, ses
, smb_buffer
, smb_buffer_response
, &length
,
3705 /* above now done in SendReceive */
3706 if ((rc
== 0) && (tcon
!= NULL
)) {
3709 tcon
->tidStatus
= CifsGood
;
3710 tcon
->need_reconnect
= false;
3711 tcon
->tid
= smb_buffer_response
->Tid
;
3712 bcc_ptr
= pByteArea(smb_buffer_response
);
3713 bytes_left
= get_bcc(smb_buffer_response
);
3714 length
= strnlen(bcc_ptr
, bytes_left
- 2);
3715 if (smb_buffer
->Flags2
& SMBFLG2_UNICODE
)
3721 /* skip service field (NB: this field is always ASCII) */
3723 if ((bcc_ptr
[0] == 'I') && (bcc_ptr
[1] == 'P') &&
3724 (bcc_ptr
[2] == 'C')) {
3725 cifs_dbg(FYI
, "IPC connection\n");
3728 } else if (length
== 2) {
3729 if ((bcc_ptr
[0] == 'A') && (bcc_ptr
[1] == ':')) {
3730 /* the most common case */
3731 cifs_dbg(FYI
, "disk share connection\n");
3734 bcc_ptr
+= length
+ 1;
3735 bytes_left
-= (length
+ 1);
3736 strncpy(tcon
->treeName
, tree
, MAX_TREE_SIZE
);
3738 /* mostly informational -- no need to fail on error here */
3739 kfree(tcon
->nativeFileSystem
);
3740 tcon
->nativeFileSystem
= cifs_strndup_from_utf16(bcc_ptr
,
3741 bytes_left
, is_unicode
,
3744 cifs_dbg(FYI
, "nativeFileSystem=%s\n", tcon
->nativeFileSystem
);
3746 if ((smb_buffer_response
->WordCount
== 3) ||
3747 (smb_buffer_response
->WordCount
== 7))
3748 /* field is in same location */
3749 tcon
->Flags
= le16_to_cpu(pSMBr
->OptionalSupport
);
3752 cifs_dbg(FYI
, "Tcon flags: 0x%x\n", tcon
->Flags
);
3753 } else if ((rc
== 0) && tcon
== NULL
) {
3754 /* all we need to save for IPC$ connection */
3755 ses
->ipc_tid
= smb_buffer_response
->Tid
;
3758 cifs_buf_release(smb_buffer
);
3763 cifs_umount(struct cifs_sb_info
*cifs_sb
)
3765 struct rb_root
*root
= &cifs_sb
->tlink_tree
;
3766 struct rb_node
*node
;
3767 struct tcon_link
*tlink
;
3769 cancel_delayed_work_sync(&cifs_sb
->prune_tlinks
);
3771 spin_lock(&cifs_sb
->tlink_tree_lock
);
3772 while ((node
= rb_first(root
))) {
3773 tlink
= rb_entry(node
, struct tcon_link
, tl_rbnode
);
3774 cifs_get_tlink(tlink
);
3775 clear_bit(TCON_LINK_IN_TREE
, &tlink
->tl_flags
);
3776 rb_erase(node
, root
);
3778 spin_unlock(&cifs_sb
->tlink_tree_lock
);
3779 cifs_put_tlink(tlink
);
3780 spin_lock(&cifs_sb
->tlink_tree_lock
);
3782 spin_unlock(&cifs_sb
->tlink_tree_lock
);
3784 bdi_destroy(&cifs_sb
->bdi
);
3785 kfree(cifs_sb
->mountdata
);
3786 unload_nls(cifs_sb
->local_nls
);
3791 cifs_negotiate_protocol(const unsigned int xid
, struct cifs_ses
*ses
)
3794 struct TCP_Server_Info
*server
= ses
->server
;
3796 if (!server
->ops
->need_neg
|| !server
->ops
->negotiate
)
3799 /* only send once per connect */
3800 if (!server
->ops
->need_neg(server
))
3803 set_credits(server
, 1);
3805 rc
= server
->ops
->negotiate(xid
, ses
);
3807 spin_lock(&GlobalMid_Lock
);
3808 if (server
->tcpStatus
== CifsNeedNegotiate
)
3809 server
->tcpStatus
= CifsGood
;
3812 spin_unlock(&GlobalMid_Lock
);
3819 cifs_setup_session(const unsigned int xid
, struct cifs_ses
*ses
,
3820 struct nls_table
*nls_info
)
3823 struct TCP_Server_Info
*server
= ses
->server
;
3826 ses
->capabilities
= server
->capabilities
;
3827 if (linuxExtEnabled
== 0)
3828 ses
->capabilities
&= (~server
->vals
->cap_unix
);
3830 cifs_dbg(FYI
, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n",
3831 server
->sec_mode
, server
->capabilities
, server
->timeAdj
);
3833 if (server
->ops
->sess_setup
)
3834 rc
= server
->ops
->sess_setup(xid
, ses
, nls_info
);
3837 cifs_dbg(VFS
, "Send error in SessSetup = %d\n", rc
);
3839 mutex_lock(&server
->srv_mutex
);
3840 if (!server
->session_estab
) {
3841 server
->session_key
.response
= ses
->auth_key
.response
;
3842 server
->session_key
.len
= ses
->auth_key
.len
;
3843 server
->sequence_number
= 0x2;
3844 server
->session_estab
= true;
3845 ses
->auth_key
.response
= NULL
;
3847 mutex_unlock(&server
->srv_mutex
);
3849 cifs_dbg(FYI
, "CIFS Session Established successfully\n");
3850 spin_lock(&GlobalMid_Lock
);
3851 ses
->status
= CifsGood
;
3852 ses
->need_reconnect
= false;
3853 spin_unlock(&GlobalMid_Lock
);
3856 kfree(ses
->auth_key
.response
);
3857 ses
->auth_key
.response
= NULL
;
3858 ses
->auth_key
.len
= 0;
3859 kfree(ses
->ntlmssp
);
3860 ses
->ntlmssp
= NULL
;
3866 cifs_set_vol_auth(struct smb_vol
*vol
, struct cifs_ses
*ses
)
3868 switch (ses
->server
->secType
) {
3870 vol
->secFlg
= CIFSSEC_MUST_KRB5
;
3873 vol
->secFlg
= CIFSSEC_MUST_NTLMV2
;
3876 vol
->secFlg
= CIFSSEC_MUST_NTLM
;
3879 vol
->secFlg
= CIFSSEC_MUST_NTLMSSP
;
3882 vol
->secFlg
= CIFSSEC_MUST_LANMAN
;
3886 return cifs_set_cifscreds(vol
, ses
);
3889 static struct cifs_tcon
*
3890 cifs_construct_tcon(struct cifs_sb_info
*cifs_sb
, kuid_t fsuid
)
3893 struct cifs_tcon
*master_tcon
= cifs_sb_master_tcon(cifs_sb
);
3894 struct cifs_ses
*ses
;
3895 struct cifs_tcon
*tcon
= NULL
;
3896 struct smb_vol
*vol_info
;
3898 vol_info
= kzalloc(sizeof(*vol_info
), GFP_KERNEL
);
3899 if (vol_info
== NULL
)
3900 return ERR_PTR(-ENOMEM
);
3902 vol_info
->local_nls
= cifs_sb
->local_nls
;
3903 vol_info
->linux_uid
= fsuid
;
3904 vol_info
->cred_uid
= fsuid
;
3905 vol_info
->UNC
= master_tcon
->treeName
;
3906 vol_info
->retry
= master_tcon
->retry
;
3907 vol_info
->nocase
= master_tcon
->nocase
;
3908 vol_info
->local_lease
= master_tcon
->local_lease
;
3909 vol_info
->no_linux_ext
= !master_tcon
->unix_ext
;
3911 rc
= cifs_set_vol_auth(vol_info
, master_tcon
->ses
);
3917 /* get a reference for the same TCP session */
3918 spin_lock(&cifs_tcp_ses_lock
);
3919 ++master_tcon
->ses
->server
->srv_count
;
3920 spin_unlock(&cifs_tcp_ses_lock
);
3922 ses
= cifs_get_smb_ses(master_tcon
->ses
->server
, vol_info
);
3924 tcon
= (struct cifs_tcon
*)ses
;
3925 cifs_put_tcp_session(master_tcon
->ses
->server
);
3929 tcon
= cifs_get_tcon(ses
, vol_info
);
3931 cifs_put_smb_ses(ses
);
3936 reset_cifs_unix_caps(0, tcon
, NULL
, vol_info
);
3938 kfree(vol_info
->username
);
3939 kfree(vol_info
->password
);
3946 cifs_sb_master_tcon(struct cifs_sb_info
*cifs_sb
)
3948 return tlink_tcon(cifs_sb_master_tlink(cifs_sb
));
3952 cifs_sb_tcon_pending_wait(void *unused
)
3955 return signal_pending(current
) ? -ERESTARTSYS
: 0;
3958 /* find and return a tlink with given uid */
3959 static struct tcon_link
*
3960 tlink_rb_search(struct rb_root
*root
, kuid_t uid
)
3962 struct rb_node
*node
= root
->rb_node
;
3963 struct tcon_link
*tlink
;
3966 tlink
= rb_entry(node
, struct tcon_link
, tl_rbnode
);
3968 if (uid_gt(tlink
->tl_uid
, uid
))
3969 node
= node
->rb_left
;
3970 else if (uid_lt(tlink
->tl_uid
, uid
))
3971 node
= node
->rb_right
;
3978 /* insert a tcon_link into the tree */
3980 tlink_rb_insert(struct rb_root
*root
, struct tcon_link
*new_tlink
)
3982 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
3983 struct tcon_link
*tlink
;
3986 tlink
= rb_entry(*new, struct tcon_link
, tl_rbnode
);
3989 if (uid_gt(tlink
->tl_uid
, new_tlink
->tl_uid
))
3990 new = &((*new)->rb_left
);
3992 new = &((*new)->rb_right
);
3995 rb_link_node(&new_tlink
->tl_rbnode
, parent
, new);
3996 rb_insert_color(&new_tlink
->tl_rbnode
, root
);
4000 * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the
4003 * If the superblock doesn't refer to a multiuser mount, then just return
4004 * the master tcon for the mount.
4006 * First, search the rbtree for an existing tcon for this fsuid. If one
4007 * exists, then check to see if it's pending construction. If it is then wait
4008 * for construction to complete. Once it's no longer pending, check to see if
4009 * it failed and either return an error or retry construction, depending on
4012 * If one doesn't exist then insert a new tcon_link struct into the tree and
4013 * try to construct a new one.
4016 cifs_sb_tlink(struct cifs_sb_info
*cifs_sb
)
4019 kuid_t fsuid
= current_fsuid();
4020 struct tcon_link
*tlink
, *newtlink
;
4022 if (!(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MULTIUSER
))
4023 return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb
));
4025 spin_lock(&cifs_sb
->tlink_tree_lock
);
4026 tlink
= tlink_rb_search(&cifs_sb
->tlink_tree
, fsuid
);
4028 cifs_get_tlink(tlink
);
4029 spin_unlock(&cifs_sb
->tlink_tree_lock
);
4031 if (tlink
== NULL
) {
4032 newtlink
= kzalloc(sizeof(*tlink
), GFP_KERNEL
);
4033 if (newtlink
== NULL
)
4034 return ERR_PTR(-ENOMEM
);
4035 newtlink
->tl_uid
= fsuid
;
4036 newtlink
->tl_tcon
= ERR_PTR(-EACCES
);
4037 set_bit(TCON_LINK_PENDING
, &newtlink
->tl_flags
);
4038 set_bit(TCON_LINK_IN_TREE
, &newtlink
->tl_flags
);
4039 cifs_get_tlink(newtlink
);
4041 spin_lock(&cifs_sb
->tlink_tree_lock
);
4042 /* was one inserted after previous search? */
4043 tlink
= tlink_rb_search(&cifs_sb
->tlink_tree
, fsuid
);
4045 cifs_get_tlink(tlink
);
4046 spin_unlock(&cifs_sb
->tlink_tree_lock
);
4048 goto wait_for_construction
;
4051 tlink_rb_insert(&cifs_sb
->tlink_tree
, tlink
);
4052 spin_unlock(&cifs_sb
->tlink_tree_lock
);
4054 wait_for_construction
:
4055 ret
= wait_on_bit(&tlink
->tl_flags
, TCON_LINK_PENDING
,
4056 cifs_sb_tcon_pending_wait
,
4057 TASK_INTERRUPTIBLE
);
4059 cifs_put_tlink(tlink
);
4060 return ERR_PTR(ret
);
4063 /* if it's good, return it */
4064 if (!IS_ERR(tlink
->tl_tcon
))
4067 /* return error if we tried this already recently */
4068 if (time_before(jiffies
, tlink
->tl_time
+ TLINK_ERROR_EXPIRE
)) {
4069 cifs_put_tlink(tlink
);
4070 return ERR_PTR(-EACCES
);
4073 if (test_and_set_bit(TCON_LINK_PENDING
, &tlink
->tl_flags
))
4074 goto wait_for_construction
;
4077 tlink
->tl_tcon
= cifs_construct_tcon(cifs_sb
, fsuid
);
4078 clear_bit(TCON_LINK_PENDING
, &tlink
->tl_flags
);
4079 wake_up_bit(&tlink
->tl_flags
, TCON_LINK_PENDING
);
4081 if (IS_ERR(tlink
->tl_tcon
)) {
4082 cifs_put_tlink(tlink
);
4083 return ERR_PTR(-EACCES
);
4090 * periodic workqueue job that scans tcon_tree for a superblock and closes
4094 cifs_prune_tlinks(struct work_struct
*work
)
4096 struct cifs_sb_info
*cifs_sb
= container_of(work
, struct cifs_sb_info
,
4098 struct rb_root
*root
= &cifs_sb
->tlink_tree
;
4099 struct rb_node
*node
= rb_first(root
);
4100 struct rb_node
*tmp
;
4101 struct tcon_link
*tlink
;
4104 * Because we drop the spinlock in the loop in order to put the tlink
4105 * it's not guarded against removal of links from the tree. The only
4106 * places that remove entries from the tree are this function and
4107 * umounts. Because this function is non-reentrant and is canceled
4108 * before umount can proceed, this is safe.
4110 spin_lock(&cifs_sb
->tlink_tree_lock
);
4111 node
= rb_first(root
);
4112 while (node
!= NULL
) {
4114 node
= rb_next(tmp
);
4115 tlink
= rb_entry(tmp
, struct tcon_link
, tl_rbnode
);
4117 if (test_bit(TCON_LINK_MASTER
, &tlink
->tl_flags
) ||
4118 atomic_read(&tlink
->tl_count
) != 0 ||
4119 time_after(tlink
->tl_time
+ TLINK_IDLE_EXPIRE
, jiffies
))
4122 cifs_get_tlink(tlink
);
4123 clear_bit(TCON_LINK_IN_TREE
, &tlink
->tl_flags
);
4124 rb_erase(tmp
, root
);
4126 spin_unlock(&cifs_sb
->tlink_tree_lock
);
4127 cifs_put_tlink(tlink
);
4128 spin_lock(&cifs_sb
->tlink_tree_lock
);
4130 spin_unlock(&cifs_sb
->tlink_tree_lock
);
4132 queue_delayed_work(cifsiod_wq
, &cifs_sb
->prune_tlinks
,