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/sched/signal.h>
25 #include <linux/list.h>
26 #include <linux/wait.h>
27 #include <linux/slab.h>
28 #include <linux/pagemap.h>
29 #include <linux/ctype.h>
30 #include <linux/utsname.h>
31 #include <linux/mempool.h>
32 #include <linux/delay.h>
33 #include <linux/completion.h>
34 #include <linux/kthread.h>
35 #include <linux/pagevec.h>
36 #include <linux/freezer.h>
37 #include <linux/namei.h>
38 #include <linux/uuid.h>
39 #include <linux/uaccess.h>
40 #include <asm/processor.h>
41 #include <linux/inet.h>
42 #include <linux/module.h>
43 #include <keys/user-type.h>
45 #include <linux/parser.h>
46 #include <linux/bvec.h>
50 #include "cifsproto.h"
51 #include "cifs_unicode.h"
52 #include "cifs_debug.h"
53 #include "cifs_fs_sb.h"
56 #include "rfc1002pdu.h"
58 #include "smb2proto.h"
61 #define RFC1001_PORT 139
63 extern mempool_t
*cifs_req_poolp
;
65 /* FIXME: should these be tunable? */
66 #define TLINK_ERROR_EXPIRE (1 * HZ)
67 #define TLINK_IDLE_EXPIRE (600 * HZ)
70 /* Mount options that take no arguments */
71 Opt_user_xattr
, Opt_nouser_xattr
,
72 Opt_forceuid
, Opt_noforceuid
,
73 Opt_forcegid
, Opt_noforcegid
,
74 Opt_noblocksend
, Opt_noautotune
,
75 Opt_hard
, Opt_soft
, Opt_perm
, Opt_noperm
,
76 Opt_mapposix
, Opt_nomapposix
,
77 Opt_mapchars
, Opt_nomapchars
, Opt_sfu
,
78 Opt_nosfu
, Opt_nodfs
, Opt_posixpaths
,
79 Opt_noposixpaths
, Opt_nounix
,
82 Opt_forcemandatorylock
, Opt_setuidfromacl
, Opt_setuids
,
83 Opt_nosetuids
, Opt_dynperm
, Opt_nodynperm
,
84 Opt_nohard
, Opt_nosoft
,
86 Opt_nostrictsync
, Opt_strictsync
,
87 Opt_serverino
, Opt_noserverino
,
88 Opt_rwpidforward
, Opt_cifsacl
, Opt_nocifsacl
,
89 Opt_acl
, Opt_noacl
, Opt_locallease
,
90 Opt_sign
, Opt_seal
, Opt_noac
,
91 Opt_fsc
, Opt_mfsymlinks
,
92 Opt_multiuser
, Opt_sloppy
, Opt_nosharesock
,
93 Opt_persistent
, Opt_nopersistent
,
94 Opt_resilient
, Opt_noresilient
,
97 /* Mount options which take numeric value */
98 Opt_backupuid
, Opt_backupgid
, Opt_uid
,
99 Opt_cruid
, Opt_gid
, Opt_file_mode
,
100 Opt_dirmode
, Opt_port
,
101 Opt_rsize
, Opt_wsize
, Opt_actimeo
,
102 Opt_echo_interval
, Opt_max_credits
,
105 /* Mount options which take string value */
106 Opt_user
, Opt_pass
, Opt_ip
,
107 Opt_domain
, Opt_srcaddr
, Opt_iocharset
,
108 Opt_netbiosname
, Opt_servern
,
109 Opt_ver
, Opt_vers
, Opt_sec
, Opt_cache
,
111 /* Mount options to be ignored */
114 /* Options which could be blank */
122 static const match_table_t cifs_mount_option_tokens
= {
124 { Opt_user_xattr
, "user_xattr" },
125 { Opt_nouser_xattr
, "nouser_xattr" },
126 { Opt_forceuid
, "forceuid" },
127 { Opt_noforceuid
, "noforceuid" },
128 { Opt_forcegid
, "forcegid" },
129 { Opt_noforcegid
, "noforcegid" },
130 { Opt_noblocksend
, "noblocksend" },
131 { Opt_noautotune
, "noautotune" },
132 { Opt_hard
, "hard" },
133 { Opt_soft
, "soft" },
134 { Opt_perm
, "perm" },
135 { Opt_noperm
, "noperm" },
136 { Opt_mapchars
, "mapchars" }, /* SFU style */
137 { Opt_nomapchars
, "nomapchars" },
138 { Opt_mapposix
, "mapposix" }, /* SFM style */
139 { Opt_nomapposix
, "nomapposix" },
141 { Opt_nosfu
, "nosfu" },
142 { Opt_nodfs
, "nodfs" },
143 { Opt_posixpaths
, "posixpaths" },
144 { Opt_noposixpaths
, "noposixpaths" },
145 { Opt_nounix
, "nounix" },
146 { Opt_nounix
, "nolinux" },
147 { Opt_nocase
, "nocase" },
148 { Opt_nocase
, "ignorecase" },
150 { Opt_nobrl
, "nobrl" },
151 { Opt_nobrl
, "nolock" },
152 { Opt_forcemandatorylock
, "forcemandatorylock" },
153 { Opt_forcemandatorylock
, "forcemand" },
154 { Opt_setuids
, "setuids" },
155 { Opt_nosetuids
, "nosetuids" },
156 { Opt_setuidfromacl
, "idsfromsid" },
157 { Opt_dynperm
, "dynperm" },
158 { Opt_nodynperm
, "nodynperm" },
159 { Opt_nohard
, "nohard" },
160 { Opt_nosoft
, "nosoft" },
161 { Opt_nointr
, "nointr" },
162 { Opt_intr
, "intr" },
163 { Opt_nostrictsync
, "nostrictsync" },
164 { Opt_strictsync
, "strictsync" },
165 { Opt_serverino
, "serverino" },
166 { Opt_noserverino
, "noserverino" },
167 { Opt_rwpidforward
, "rwpidforward" },
168 { Opt_cifsacl
, "cifsacl" },
169 { Opt_nocifsacl
, "nocifsacl" },
171 { Opt_noacl
, "noacl" },
172 { Opt_locallease
, "locallease" },
173 { Opt_sign
, "sign" },
174 { Opt_seal
, "seal" },
175 { Opt_noac
, "noac" },
177 { Opt_mfsymlinks
, "mfsymlinks" },
178 { Opt_multiuser
, "multiuser" },
179 { Opt_sloppy
, "sloppy" },
180 { Opt_nosharesock
, "nosharesock" },
181 { Opt_persistent
, "persistenthandles"},
182 { Opt_nopersistent
, "nopersistenthandles"},
183 { Opt_resilient
, "resilienthandles"},
184 { Opt_noresilient
, "noresilienthandles"},
185 { Opt_domainauto
, "domainauto"},
187 { Opt_backupuid
, "backupuid=%s" },
188 { Opt_backupgid
, "backupgid=%s" },
189 { Opt_uid
, "uid=%s" },
190 { Opt_cruid
, "cruid=%s" },
191 { Opt_gid
, "gid=%s" },
192 { Opt_file_mode
, "file_mode=%s" },
193 { Opt_dirmode
, "dirmode=%s" },
194 { Opt_dirmode
, "dir_mode=%s" },
195 { Opt_port
, "port=%s" },
196 { Opt_rsize
, "rsize=%s" },
197 { Opt_wsize
, "wsize=%s" },
198 { Opt_actimeo
, "actimeo=%s" },
199 { Opt_echo_interval
, "echo_interval=%s" },
200 { Opt_max_credits
, "max_credits=%s" },
201 { Opt_snapshot
, "snapshot=%s" },
203 { Opt_blank_user
, "user=" },
204 { Opt_blank_user
, "username=" },
205 { Opt_user
, "user=%s" },
206 { Opt_user
, "username=%s" },
207 { Opt_blank_pass
, "pass=" },
208 { Opt_blank_pass
, "password=" },
209 { Opt_pass
, "pass=%s" },
210 { Opt_pass
, "password=%s" },
211 { Opt_blank_ip
, "ip=" },
212 { Opt_blank_ip
, "addr=" },
214 { Opt_ip
, "addr=%s" },
215 { Opt_ignore
, "unc=%s" },
216 { Opt_ignore
, "target=%s" },
217 { Opt_ignore
, "path=%s" },
218 { Opt_domain
, "dom=%s" },
219 { Opt_domain
, "domain=%s" },
220 { Opt_domain
, "workgroup=%s" },
221 { Opt_srcaddr
, "srcaddr=%s" },
222 { Opt_ignore
, "prefixpath=%s" },
223 { Opt_iocharset
, "iocharset=%s" },
224 { Opt_netbiosname
, "netbiosname=%s" },
225 { Opt_servern
, "servern=%s" },
226 { Opt_ver
, "ver=%s" },
227 { Opt_vers
, "vers=%s" },
228 { Opt_sec
, "sec=%s" },
229 { Opt_cache
, "cache=%s" },
231 { Opt_ignore
, "cred" },
232 { Opt_ignore
, "credentials" },
233 { Opt_ignore
, "cred=%s" },
234 { Opt_ignore
, "credentials=%s" },
235 { Opt_ignore
, "guest" },
236 { Opt_ignore
, "rw" },
237 { Opt_ignore
, "ro" },
238 { Opt_ignore
, "suid" },
239 { Opt_ignore
, "nosuid" },
240 { Opt_ignore
, "exec" },
241 { Opt_ignore
, "noexec" },
242 { Opt_ignore
, "nodev" },
243 { Opt_ignore
, "noauto" },
244 { Opt_ignore
, "dev" },
245 { Opt_ignore
, "mand" },
246 { Opt_ignore
, "nomand" },
247 { Opt_ignore
, "_netdev" },
253 Opt_sec_krb5
, Opt_sec_krb5i
, Opt_sec_krb5p
,
254 Opt_sec_ntlmsspi
, Opt_sec_ntlmssp
,
255 Opt_ntlm
, Opt_sec_ntlmi
, Opt_sec_ntlmv2
,
256 Opt_sec_ntlmv2i
, Opt_sec_lanman
,
262 static const match_table_t cifs_secflavor_tokens
= {
263 { Opt_sec_krb5
, "krb5" },
264 { Opt_sec_krb5i
, "krb5i" },
265 { Opt_sec_krb5p
, "krb5p" },
266 { Opt_sec_ntlmsspi
, "ntlmsspi" },
267 { Opt_sec_ntlmssp
, "ntlmssp" },
268 { Opt_ntlm
, "ntlm" },
269 { Opt_sec_ntlmi
, "ntlmi" },
270 { Opt_sec_ntlmv2
, "nontlm" },
271 { Opt_sec_ntlmv2
, "ntlmv2" },
272 { Opt_sec_ntlmv2i
, "ntlmv2i" },
273 { Opt_sec_lanman
, "lanman" },
274 { Opt_sec_none
, "none" },
276 { Opt_sec_err
, NULL
}
287 static const match_table_t cifs_cacheflavor_tokens
= {
288 { Opt_cache_loose
, "loose" },
289 { Opt_cache_strict
, "strict" },
290 { Opt_cache_none
, "none" },
291 { Opt_cache_err
, NULL
}
294 static const match_table_t cifs_smb_version_tokens
= {
295 { Smb_1
, SMB1_VERSION_STRING
},
296 { Smb_20
, SMB20_VERSION_STRING
},
297 { Smb_21
, SMB21_VERSION_STRING
},
298 { Smb_30
, SMB30_VERSION_STRING
},
299 { Smb_302
, SMB302_VERSION_STRING
},
300 #ifdef CONFIG_CIFS_SMB311
301 { Smb_311
, SMB311_VERSION_STRING
},
302 { Smb_311
, ALT_SMB311_VERSION_STRING
},
304 { Smb_3any
, SMB3ANY_VERSION_STRING
},
305 { Smb_default
, SMBDEFAULT_VERSION_STRING
},
306 { Smb_version_err
, NULL
}
309 static int ip_connect(struct TCP_Server_Info
*server
);
310 static int generic_ip_connect(struct TCP_Server_Info
*server
);
311 static void tlink_rb_insert(struct rb_root
*root
, struct tcon_link
*new_tlink
);
312 static void cifs_prune_tlinks(struct work_struct
*work
);
313 static int cifs_setup_volume_info(struct smb_vol
*volume_info
, char *mount_data
,
314 const char *devname
);
317 * cifs tcp session reconnection
319 * mark tcp session as reconnecting so temporarily locked
320 * mark all smb sessions as reconnecting for tcp session
321 * reconnect tcp session
322 * wake up waiters on reconnection? - (not needed currently)
325 cifs_reconnect(struct TCP_Server_Info
*server
)
328 struct list_head
*tmp
, *tmp2
;
329 struct cifs_ses
*ses
;
330 struct cifs_tcon
*tcon
;
331 struct mid_q_entry
*mid_entry
;
332 struct list_head retry_list
;
334 spin_lock(&GlobalMid_Lock
);
335 if (server
->tcpStatus
== CifsExiting
) {
336 /* the demux thread will exit normally
337 next time through the loop */
338 spin_unlock(&GlobalMid_Lock
);
341 server
->tcpStatus
= CifsNeedReconnect
;
342 spin_unlock(&GlobalMid_Lock
);
344 server
->max_read
= 0;
346 cifs_dbg(FYI
, "Reconnecting tcp session\n");
348 /* before reconnecting the tcp session, mark the smb session (uid)
349 and the tid bad so they are not used until reconnected */
350 cifs_dbg(FYI
, "%s: marking sessions and tcons for reconnect\n",
352 spin_lock(&cifs_tcp_ses_lock
);
353 list_for_each(tmp
, &server
->smb_ses_list
) {
354 ses
= list_entry(tmp
, struct cifs_ses
, smb_ses_list
);
355 ses
->need_reconnect
= true;
356 list_for_each(tmp2
, &ses
->tcon_list
) {
357 tcon
= list_entry(tmp2
, struct cifs_tcon
, tcon_list
);
358 tcon
->need_reconnect
= true;
361 ses
->tcon_ipc
->need_reconnect
= true;
363 spin_unlock(&cifs_tcp_ses_lock
);
365 /* do not want to be sending data on a socket we are freeing */
366 cifs_dbg(FYI
, "%s: tearing down socket\n", __func__
);
367 mutex_lock(&server
->srv_mutex
);
368 if (server
->ssocket
) {
369 cifs_dbg(FYI
, "State: 0x%x Flags: 0x%lx\n",
370 server
->ssocket
->state
, server
->ssocket
->flags
);
371 kernel_sock_shutdown(server
->ssocket
, SHUT_WR
);
372 cifs_dbg(FYI
, "Post shutdown state: 0x%x Flags: 0x%lx\n",
373 server
->ssocket
->state
, server
->ssocket
->flags
);
374 sock_release(server
->ssocket
);
375 server
->ssocket
= NULL
;
377 server
->sequence_number
= 0;
378 server
->session_estab
= false;
379 kfree(server
->session_key
.response
);
380 server
->session_key
.response
= NULL
;
381 server
->session_key
.len
= 0;
382 server
->lstrp
= jiffies
;
384 /* mark submitted MIDs for retry and issue callback */
385 INIT_LIST_HEAD(&retry_list
);
386 cifs_dbg(FYI
, "%s: moving mids to private list\n", __func__
);
387 spin_lock(&GlobalMid_Lock
);
388 list_for_each_safe(tmp
, tmp2
, &server
->pending_mid_q
) {
389 mid_entry
= list_entry(tmp
, struct mid_q_entry
, qhead
);
390 if (mid_entry
->mid_state
== MID_REQUEST_SUBMITTED
)
391 mid_entry
->mid_state
= MID_RETRY_NEEDED
;
392 list_move(&mid_entry
->qhead
, &retry_list
);
394 spin_unlock(&GlobalMid_Lock
);
395 mutex_unlock(&server
->srv_mutex
);
397 cifs_dbg(FYI
, "%s: issuing mid callbacks\n", __func__
);
398 list_for_each_safe(tmp
, tmp2
, &retry_list
) {
399 mid_entry
= list_entry(tmp
, struct mid_q_entry
, qhead
);
400 list_del_init(&mid_entry
->qhead
);
401 mid_entry
->callback(mid_entry
);
407 /* we should try only the port we connected to before */
408 mutex_lock(&server
->srv_mutex
);
409 rc
= generic_ip_connect(server
);
411 cifs_dbg(FYI
, "reconnect error %d\n", rc
);
412 mutex_unlock(&server
->srv_mutex
);
415 atomic_inc(&tcpSesReconnectCount
);
416 spin_lock(&GlobalMid_Lock
);
417 if (server
->tcpStatus
!= CifsExiting
)
418 server
->tcpStatus
= CifsNeedNegotiate
;
419 spin_unlock(&GlobalMid_Lock
);
420 mutex_unlock(&server
->srv_mutex
);
422 } while (server
->tcpStatus
== CifsNeedReconnect
);
424 if (server
->tcpStatus
== CifsNeedNegotiate
)
425 mod_delayed_work(cifsiod_wq
, &server
->echo
, 0);
431 cifs_echo_request(struct work_struct
*work
)
434 struct TCP_Server_Info
*server
= container_of(work
,
435 struct TCP_Server_Info
, echo
.work
);
436 unsigned long echo_interval
;
439 * If we need to renegotiate, set echo interval to zero to
440 * immediately call echo service where we can renegotiate.
442 if (server
->tcpStatus
== CifsNeedNegotiate
)
445 echo_interval
= server
->echo_interval
;
448 * We cannot send an echo if it is disabled.
449 * Also, no need to ping if we got a response recently.
452 if (server
->tcpStatus
== CifsNeedReconnect
||
453 server
->tcpStatus
== CifsExiting
||
454 server
->tcpStatus
== CifsNew
||
455 (server
->ops
->can_echo
&& !server
->ops
->can_echo(server
)) ||
456 time_before(jiffies
, server
->lstrp
+ echo_interval
- HZ
))
459 rc
= server
->ops
->echo
? server
->ops
->echo(server
) : -ENOSYS
;
461 cifs_dbg(FYI
, "Unable to send echo request to server: %s\n",
465 queue_delayed_work(cifsiod_wq
, &server
->echo
, server
->echo_interval
);
469 allocate_buffers(struct TCP_Server_Info
*server
)
471 if (!server
->bigbuf
) {
472 server
->bigbuf
= (char *)cifs_buf_get();
473 if (!server
->bigbuf
) {
474 cifs_dbg(VFS
, "No memory for large SMB response\n");
476 /* retry will check if exiting */
479 } else if (server
->large_buf
) {
480 /* we are reusing a dirty large buf, clear its start */
481 memset(server
->bigbuf
, 0, HEADER_SIZE(server
));
484 if (!server
->smallbuf
) {
485 server
->smallbuf
= (char *)cifs_small_buf_get();
486 if (!server
->smallbuf
) {
487 cifs_dbg(VFS
, "No memory for SMB response\n");
489 /* retry will check if exiting */
492 /* beginning of smb buffer is cleared in our buf_get */
494 /* if existing small buf clear beginning */
495 memset(server
->smallbuf
, 0, HEADER_SIZE(server
));
502 server_unresponsive(struct TCP_Server_Info
*server
)
505 * We need to wait 2 echo intervals to make sure we handle such
507 * 1s client sends a normal SMB request
508 * 2s client gets a response
509 * 30s echo workqueue job pops, and decides we got a response recently
510 * and don't need to send another
512 * 65s kernel_recvmsg times out, and we see that we haven't gotten
513 * a response in >60s.
515 if ((server
->tcpStatus
== CifsGood
||
516 server
->tcpStatus
== CifsNeedNegotiate
) &&
517 time_after(jiffies
, server
->lstrp
+ 2 * server
->echo_interval
)) {
518 cifs_dbg(VFS
, "Server %s has not responded in %lu seconds. Reconnecting...\n",
519 server
->hostname
, (2 * server
->echo_interval
) / HZ
);
520 cifs_reconnect(server
);
521 wake_up(&server
->response_q
);
529 cifs_readv_from_socket(struct TCP_Server_Info
*server
, struct msghdr
*smb_msg
)
534 smb_msg
->msg_control
= NULL
;
535 smb_msg
->msg_controllen
= 0;
537 for (total_read
= 0; msg_data_left(smb_msg
); total_read
+= length
) {
540 if (server_unresponsive(server
))
541 return -ECONNABORTED
;
543 length
= sock_recvmsg(server
->ssocket
, smb_msg
, 0);
545 if (server
->tcpStatus
== CifsExiting
)
548 if (server
->tcpStatus
== CifsNeedReconnect
) {
549 cifs_reconnect(server
);
550 return -ECONNABORTED
;
553 if (length
== -ERESTARTSYS
||
557 * Minimum sleep to prevent looping, allowing socket
558 * to clear and app threads to set tcpStatus
559 * CifsNeedReconnect if server hung.
561 usleep_range(1000, 2000);
567 cifs_dbg(FYI
, "Received no data or error: %d\n", length
);
568 cifs_reconnect(server
);
569 return -ECONNABORTED
;
576 cifs_read_from_socket(struct TCP_Server_Info
*server
, char *buf
,
577 unsigned int to_read
)
579 struct msghdr smb_msg
;
580 struct kvec iov
= {.iov_base
= buf
, .iov_len
= to_read
};
581 iov_iter_kvec(&smb_msg
.msg_iter
, READ
| ITER_KVEC
, &iov
, 1, to_read
);
583 return cifs_readv_from_socket(server
, &smb_msg
);
587 cifs_read_page_from_socket(struct TCP_Server_Info
*server
, struct page
*page
,
588 unsigned int to_read
)
590 struct msghdr smb_msg
;
591 struct bio_vec bv
= {.bv_page
= page
, .bv_len
= to_read
};
592 iov_iter_bvec(&smb_msg
.msg_iter
, READ
| ITER_BVEC
, &bv
, 1, to_read
);
593 return cifs_readv_from_socket(server
, &smb_msg
);
597 is_smb_response(struct TCP_Server_Info
*server
, unsigned char type
)
600 * The first byte big endian of the length field,
601 * is actually not part of the length but the type
602 * with the most common, zero, as regular data.
605 case RFC1002_SESSION_MESSAGE
:
606 /* Regular SMB response */
608 case RFC1002_SESSION_KEEP_ALIVE
:
609 cifs_dbg(FYI
, "RFC 1002 session keep alive\n");
611 case RFC1002_POSITIVE_SESSION_RESPONSE
:
612 cifs_dbg(FYI
, "RFC 1002 positive session response\n");
614 case RFC1002_NEGATIVE_SESSION_RESPONSE
:
616 * We get this from Windows 98 instead of an error on
617 * SMB negprot response.
619 cifs_dbg(FYI
, "RFC 1002 negative session response\n");
620 /* give server a second to clean up */
623 * Always try 445 first on reconnect since we get NACK
624 * on some if we ever connected to port 139 (the NACK
625 * is since we do not begin with RFC1001 session
628 cifs_set_port((struct sockaddr
*)&server
->dstaddr
, CIFS_PORT
);
629 cifs_reconnect(server
);
630 wake_up(&server
->response_q
);
633 cifs_dbg(VFS
, "RFC 1002 unknown response type 0x%x\n", type
);
634 cifs_reconnect(server
);
641 dequeue_mid(struct mid_q_entry
*mid
, bool malformed
)
643 #ifdef CONFIG_CIFS_STATS2
644 mid
->when_received
= jiffies
;
646 spin_lock(&GlobalMid_Lock
);
648 mid
->mid_state
= MID_RESPONSE_RECEIVED
;
650 mid
->mid_state
= MID_RESPONSE_MALFORMED
;
651 list_del_init(&mid
->qhead
);
652 spin_unlock(&GlobalMid_Lock
);
656 handle_mid(struct mid_q_entry
*mid
, struct TCP_Server_Info
*server
,
657 char *buf
, int malformed
)
659 if (server
->ops
->check_trans2
&&
660 server
->ops
->check_trans2(mid
, server
, buf
, malformed
))
663 mid
->large_buf
= server
->large_buf
;
664 /* Was previous buf put in mpx struct for multi-rsp? */
665 if (!mid
->multiRsp
) {
666 /* smb buffer will be freed by user thread */
667 if (server
->large_buf
)
668 server
->bigbuf
= NULL
;
670 server
->smallbuf
= NULL
;
672 dequeue_mid(mid
, malformed
);
675 static void clean_demultiplex_info(struct TCP_Server_Info
*server
)
679 /* take it off the list, if it's not already */
680 spin_lock(&cifs_tcp_ses_lock
);
681 list_del_init(&server
->tcp_ses_list
);
682 spin_unlock(&cifs_tcp_ses_lock
);
684 spin_lock(&GlobalMid_Lock
);
685 server
->tcpStatus
= CifsExiting
;
686 spin_unlock(&GlobalMid_Lock
);
687 wake_up_all(&server
->response_q
);
689 /* check if we have blocked requests that need to free */
690 spin_lock(&server
->req_lock
);
691 if (server
->credits
<= 0)
693 spin_unlock(&server
->req_lock
);
695 * Although there should not be any requests blocked on this queue it
696 * can not hurt to be paranoid and try to wake up requests that may
697 * haven been blocked when more than 50 at time were on the wire to the
698 * same server - they now will see the session is in exit state and get
699 * out of SendReceive.
701 wake_up_all(&server
->request_q
);
702 /* give those requests time to exit */
705 if (server
->ssocket
) {
706 sock_release(server
->ssocket
);
707 server
->ssocket
= NULL
;
710 if (!list_empty(&server
->pending_mid_q
)) {
711 struct list_head dispose_list
;
712 struct mid_q_entry
*mid_entry
;
713 struct list_head
*tmp
, *tmp2
;
715 INIT_LIST_HEAD(&dispose_list
);
716 spin_lock(&GlobalMid_Lock
);
717 list_for_each_safe(tmp
, tmp2
, &server
->pending_mid_q
) {
718 mid_entry
= list_entry(tmp
, struct mid_q_entry
, qhead
);
719 cifs_dbg(FYI
, "Clearing mid 0x%llx\n", mid_entry
->mid
);
720 mid_entry
->mid_state
= MID_SHUTDOWN
;
721 list_move(&mid_entry
->qhead
, &dispose_list
);
723 spin_unlock(&GlobalMid_Lock
);
725 /* now walk dispose list and issue callbacks */
726 list_for_each_safe(tmp
, tmp2
, &dispose_list
) {
727 mid_entry
= list_entry(tmp
, struct mid_q_entry
, qhead
);
728 cifs_dbg(FYI
, "Callback mid 0x%llx\n", mid_entry
->mid
);
729 list_del_init(&mid_entry
->qhead
);
730 mid_entry
->callback(mid_entry
);
732 /* 1/8th of sec is more than enough time for them to exit */
736 if (!list_empty(&server
->pending_mid_q
)) {
738 * mpx threads have not exited yet give them at least the smb
739 * send timeout time for long ops.
741 * Due to delays on oplock break requests, we need to wait at
742 * least 45 seconds before giving up on a request getting a
743 * response and going ahead and killing cifsd.
745 cifs_dbg(FYI
, "Wait for exit from demultiplex thread\n");
748 * If threads still have not exited they are probably never
749 * coming home not much else we can do but free the memory.
753 kfree(server
->hostname
);
756 length
= atomic_dec_return(&tcpSesAllocCount
);
758 mempool_resize(cifs_req_poolp
, length
+ cifs_min_rcv
);
762 standard_receive3(struct TCP_Server_Info
*server
, struct mid_q_entry
*mid
)
765 char *buf
= server
->smallbuf
;
766 unsigned int pdu_length
= get_rfc1002_length(buf
);
768 /* make sure this will fit in a large buffer */
769 if (pdu_length
> CIFSMaxBufSize
+ MAX_HEADER_SIZE(server
) - 4) {
770 cifs_dbg(VFS
, "SMB response too long (%u bytes)\n", pdu_length
);
771 cifs_reconnect(server
);
772 wake_up(&server
->response_q
);
773 return -ECONNABORTED
;
776 /* switch to large buffer if too big for a small one */
777 if (pdu_length
> MAX_CIFS_SMALL_BUFFER_SIZE
- 4) {
778 server
->large_buf
= true;
779 memcpy(server
->bigbuf
, buf
, server
->total_read
);
780 buf
= server
->bigbuf
;
783 /* now read the rest */
784 length
= cifs_read_from_socket(server
, buf
+ HEADER_SIZE(server
) - 1,
785 pdu_length
- HEADER_SIZE(server
) + 1 + 4);
788 server
->total_read
+= length
;
790 dump_smb(buf
, server
->total_read
);
792 return cifs_handle_standard(server
, mid
);
796 cifs_handle_standard(struct TCP_Server_Info
*server
, struct mid_q_entry
*mid
)
798 char *buf
= server
->large_buf
? server
->bigbuf
: server
->smallbuf
;
802 * We know that we received enough to get to the MID as we
803 * checked the pdu_length earlier. Now check to see
804 * if the rest of the header is OK. We borrow the length
805 * var for the rest of the loop to avoid a new stack var.
807 * 48 bytes is enough to display the header and a little bit
808 * into the payload for debugging purposes.
810 length
= server
->ops
->check_message(buf
, server
->total_read
, server
);
812 cifs_dump_mem("Bad SMB: ", buf
,
813 min_t(unsigned int, server
->total_read
, 48));
815 if (server
->ops
->is_session_expired
&&
816 server
->ops
->is_session_expired(buf
)) {
817 cifs_reconnect(server
);
818 wake_up(&server
->response_q
);
822 if (server
->ops
->is_status_pending
&&
823 server
->ops
->is_status_pending(buf
, server
, length
))
829 handle_mid(mid
, server
, buf
, length
);
834 cifs_demultiplex_thread(void *p
)
837 struct TCP_Server_Info
*server
= p
;
838 unsigned int pdu_length
;
840 struct task_struct
*task_to_wake
= NULL
;
841 struct mid_q_entry
*mid_entry
;
843 current
->flags
|= PF_MEMALLOC
;
844 cifs_dbg(FYI
, "Demultiplex PID: %d\n", task_pid_nr(current
));
846 length
= atomic_inc_return(&tcpSesAllocCount
);
848 mempool_resize(cifs_req_poolp
, length
+ cifs_min_rcv
);
851 while (server
->tcpStatus
!= CifsExiting
) {
855 if (!allocate_buffers(server
))
858 server
->large_buf
= false;
859 buf
= server
->smallbuf
;
860 pdu_length
= 4; /* enough to get RFC1001 header */
862 length
= cifs_read_from_socket(server
, buf
, pdu_length
);
865 server
->total_read
= length
;
868 * The right amount was read from socket - 4 bytes,
869 * so we can now interpret the length field.
871 pdu_length
= get_rfc1002_length(buf
);
873 cifs_dbg(FYI
, "RFC1002 header 0x%x\n", pdu_length
);
874 if (!is_smb_response(server
, buf
[0]))
877 /* make sure we have enough to get to the MID */
878 if (pdu_length
< HEADER_SIZE(server
) - 1 - 4) {
879 cifs_dbg(VFS
, "SMB response too short (%u bytes)\n",
881 cifs_reconnect(server
);
882 wake_up(&server
->response_q
);
886 /* read down to the MID */
887 length
= cifs_read_from_socket(server
, buf
+ 4,
888 HEADER_SIZE(server
) - 1 - 4);
891 server
->total_read
+= length
;
893 if (server
->ops
->is_transform_hdr
&&
894 server
->ops
->receive_transform
&&
895 server
->ops
->is_transform_hdr(buf
)) {
896 length
= server
->ops
->receive_transform(server
,
899 mid_entry
= server
->ops
->find_mid(server
, buf
);
901 if (!mid_entry
|| !mid_entry
->receive
)
902 length
= standard_receive3(server
, mid_entry
);
904 length
= mid_entry
->receive(server
, mid_entry
);
910 if (server
->large_buf
)
911 buf
= server
->bigbuf
;
913 server
->lstrp
= jiffies
;
914 if (mid_entry
!= NULL
) {
915 if ((mid_entry
->mid_flags
& MID_WAIT_CANCELLED
) &&
916 mid_entry
->mid_state
== MID_RESPONSE_RECEIVED
&&
917 server
->ops
->handle_cancelled_mid
)
918 server
->ops
->handle_cancelled_mid(
922 if (!mid_entry
->multiRsp
|| mid_entry
->multiEnd
)
923 mid_entry
->callback(mid_entry
);
924 } else if (server
->ops
->is_oplock_break
&&
925 server
->ops
->is_oplock_break(buf
, server
)) {
926 cifs_dbg(FYI
, "Received oplock break\n");
928 cifs_dbg(VFS
, "No task to wake, unknown frame received! NumMids %d\n",
929 atomic_read(&midCount
));
930 cifs_dump_mem("Received Data is: ", buf
,
931 HEADER_SIZE(server
));
932 #ifdef CONFIG_CIFS_DEBUG2
933 if (server
->ops
->dump_detail
)
934 server
->ops
->dump_detail(buf
);
935 cifs_dump_mids(server
);
936 #endif /* CIFS_DEBUG2 */
939 } /* end while !EXITING */
941 /* buffer usually freed in free_mid - need to free it here on exit */
942 cifs_buf_release(server
->bigbuf
);
943 if (server
->smallbuf
) /* no sense logging a debug message if NULL */
944 cifs_small_buf_release(server
->smallbuf
);
946 task_to_wake
= xchg(&server
->tsk
, NULL
);
947 clean_demultiplex_info(server
);
949 /* if server->tsk was NULL then wait for a signal before exiting */
951 set_current_state(TASK_INTERRUPTIBLE
);
952 while (!signal_pending(current
)) {
954 set_current_state(TASK_INTERRUPTIBLE
);
956 set_current_state(TASK_RUNNING
);
959 module_put_and_exit(0);
962 /* extract the host portion of the UNC string */
964 extract_hostname(const char *unc
)
970 /* skip double chars at beginning of string */
971 /* BB: check validity of these bytes? */
974 /* delimiter between hostname and sharename is always '\\' now */
975 delim
= strchr(src
, '\\');
977 return ERR_PTR(-EINVAL
);
980 dst
= kmalloc((len
+ 1), GFP_KERNEL
);
982 return ERR_PTR(-ENOMEM
);
984 memcpy(dst
, src
, len
);
990 static int get_option_ul(substring_t args
[], unsigned long *option
)
995 string
= match_strdup(args
);
998 rc
= kstrtoul(string
, 0, option
);
1004 static int get_option_uid(substring_t args
[], kuid_t
*result
)
1006 unsigned long value
;
1010 rc
= get_option_ul(args
, &value
);
1014 uid
= make_kuid(current_user_ns(), value
);
1015 if (!uid_valid(uid
))
1022 static int get_option_gid(substring_t args
[], kgid_t
*result
)
1024 unsigned long value
;
1028 rc
= get_option_ul(args
, &value
);
1032 gid
= make_kgid(current_user_ns(), value
);
1033 if (!gid_valid(gid
))
1040 static int cifs_parse_security_flavors(char *value
,
1041 struct smb_vol
*vol
)
1044 substring_t args
[MAX_OPT_ARGS
];
1047 * With mount options, the last one should win. Reset any existing
1048 * settings back to default.
1050 vol
->sectype
= Unspecified
;
1053 switch (match_token(value
, cifs_secflavor_tokens
, args
)) {
1055 cifs_dbg(VFS
, "sec=krb5p is not supported!\n");
1061 vol
->sectype
= Kerberos
;
1063 case Opt_sec_ntlmsspi
:
1066 case Opt_sec_ntlmssp
:
1067 vol
->sectype
= RawNTLMSSP
;
1073 vol
->sectype
= NTLM
;
1075 case Opt_sec_ntlmv2i
:
1078 case Opt_sec_ntlmv2
:
1079 vol
->sectype
= NTLMv2
;
1081 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1082 case Opt_sec_lanman
:
1083 vol
->sectype
= LANMAN
;
1090 cifs_dbg(VFS
, "bad security option: %s\n", value
);
1098 cifs_parse_cache_flavor(char *value
, struct smb_vol
*vol
)
1100 substring_t args
[MAX_OPT_ARGS
];
1102 switch (match_token(value
, cifs_cacheflavor_tokens
, args
)) {
1103 case Opt_cache_loose
:
1104 vol
->direct_io
= false;
1105 vol
->strict_io
= false;
1107 case Opt_cache_strict
:
1108 vol
->direct_io
= false;
1109 vol
->strict_io
= true;
1111 case Opt_cache_none
:
1112 vol
->direct_io
= true;
1113 vol
->strict_io
= false;
1116 cifs_dbg(VFS
, "bad cache= option: %s\n", value
);
1123 cifs_parse_smb_version(char *value
, struct smb_vol
*vol
)
1125 substring_t args
[MAX_OPT_ARGS
];
1127 switch (match_token(value
, cifs_smb_version_tokens
, args
)) {
1129 vol
->ops
= &smb1_operations
;
1130 vol
->vals
= &smb1_values
;
1133 vol
->ops
= &smb20_operations
;
1134 vol
->vals
= &smb20_values
;
1137 vol
->ops
= &smb21_operations
;
1138 vol
->vals
= &smb21_values
;
1141 vol
->ops
= &smb30_operations
;
1142 vol
->vals
= &smb30_values
;
1145 vol
->ops
= &smb30_operations
; /* currently identical with 3.0 */
1146 vol
->vals
= &smb302_values
;
1148 #ifdef CONFIG_CIFS_SMB311
1150 vol
->ops
= &smb311_operations
;
1151 vol
->vals
= &smb311_values
;
1155 vol
->ops
= &smb30_operations
; /* currently identical with 3.0 */
1156 vol
->vals
= &smb3any_values
;
1159 vol
->ops
= &smb30_operations
; /* currently identical with 3.0 */
1160 vol
->vals
= &smbdefault_values
;
1163 cifs_dbg(VFS
, "Unknown vers= option specified: %s\n", value
);
1170 * Parse a devname into substrings and populate the vol->UNC and vol->prepath
1171 * fields with the result. Returns 0 on success and an error otherwise.
1174 cifs_parse_devname(const char *devname
, struct smb_vol
*vol
)
1177 const char *delims
= "/\\";
1180 /* make sure we have a valid UNC double delimiter prefix */
1181 len
= strspn(devname
, delims
);
1185 /* find delimiter between host and sharename */
1186 pos
= strpbrk(devname
+ 2, delims
);
1190 /* skip past delimiter */
1193 /* now go until next delimiter or end of string */
1194 len
= strcspn(pos
, delims
);
1196 /* move "pos" up to delimiter or NULL */
1198 vol
->UNC
= kstrndup(devname
, pos
- devname
, GFP_KERNEL
);
1202 convert_delimiter(vol
->UNC
, '\\');
1204 /* skip any delimiter */
1205 if (*pos
== '/' || *pos
== '\\')
1208 /* If pos is NULL then no prepath */
1212 vol
->prepath
= kstrdup(pos
, GFP_KERNEL
);
1220 cifs_parse_mount_options(const char *mountdata
, const char *devname
,
1221 struct smb_vol
*vol
)
1224 char *mountdata_copy
= NULL
, *options
;
1225 unsigned int temp_len
, i
, j
;
1227 short int override_uid
= -1;
1228 short int override_gid
= -1;
1229 bool uid_specified
= false;
1230 bool gid_specified
= false;
1231 bool sloppy
= false;
1232 char *invalid
= NULL
;
1233 char *nodename
= utsname()->nodename
;
1234 char *string
= NULL
;
1235 char *tmp_end
, *value
;
1237 bool got_ip
= false;
1238 bool got_version
= false;
1239 unsigned short port
= 0;
1240 struct sockaddr
*dstaddr
= (struct sockaddr
*)&vol
->dstaddr
;
1244 delim
= separator
[0];
1246 /* ensure we always start with zeroed-out smb_vol */
1247 memset(vol
, 0, sizeof(*vol
));
1250 * does not have to be perfect mapping since field is
1251 * informational, only used for servers that do not support
1252 * port 445 and it can be overridden at mount time
1254 memset(vol
->source_rfc1001_name
, 0x20, RFC1001_NAME_LEN
);
1255 for (i
= 0; i
< strnlen(nodename
, RFC1001_NAME_LEN
); i
++)
1256 vol
->source_rfc1001_name
[i
] = toupper(nodename
[i
]);
1258 vol
->source_rfc1001_name
[RFC1001_NAME_LEN
] = 0;
1259 /* null target name indicates to use *SMBSERVR default called name
1260 if we end up sending RFC1001 session initialize */
1261 vol
->target_rfc1001_name
[0] = 0;
1262 vol
->cred_uid
= current_uid();
1263 vol
->linux_uid
= current_uid();
1264 vol
->linux_gid
= current_gid();
1267 * default to SFM style remapping of seven reserved characters
1268 * unless user overrides it or we negotiate CIFS POSIX where
1269 * it is unnecessary. Can not simultaneously use more than one mapping
1270 * since then readdir could list files that open could not open
1274 /* default to only allowing write access to owner of the mount */
1275 vol
->dir_mode
= vol
->file_mode
= S_IRUGO
| S_IXUGO
| S_IWUSR
;
1277 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
1278 /* default is always to request posix paths. */
1279 vol
->posix_paths
= 1;
1280 /* default to using server inode numbers where available */
1281 vol
->server_ino
= 1;
1283 /* default is to use strict cifs caching semantics */
1284 vol
->strict_io
= true;
1286 vol
->actimeo
= CIFS_DEF_ACTIMEO
;
1288 /* offer SMB2.1 and later (SMB3 etc). Secure and widely accepted */
1289 vol
->ops
= &smb30_operations
;
1290 vol
->vals
= &smbdefault_values
;
1292 vol
->echo_interval
= SMB_ECHO_INTERVAL_DEFAULT
;
1295 goto cifs_parse_mount_err
;
1297 mountdata_copy
= kstrndup(mountdata
, PAGE_SIZE
, GFP_KERNEL
);
1298 if (!mountdata_copy
)
1299 goto cifs_parse_mount_err
;
1301 options
= mountdata_copy
;
1302 end
= options
+ strlen(options
);
1304 if (strncmp(options
, "sep=", 4) == 0) {
1305 if (options
[4] != 0) {
1306 separator
[0] = options
[4];
1309 cifs_dbg(FYI
, "Null separator not allowed\n");
1312 vol
->backupuid_specified
= false; /* no backup intent for a user */
1313 vol
->backupgid_specified
= false; /* no backup intent for a group */
1315 switch (cifs_parse_devname(devname
, vol
)) {
1319 cifs_dbg(VFS
, "Unable to allocate memory for devname.\n");
1320 goto cifs_parse_mount_err
;
1322 cifs_dbg(VFS
, "Malformed UNC in devname.\n");
1323 goto cifs_parse_mount_err
;
1325 cifs_dbg(VFS
, "Unknown error parsing devname.\n");
1326 goto cifs_parse_mount_err
;
1329 while ((data
= strsep(&options
, separator
)) != NULL
) {
1330 substring_t args
[MAX_OPT_ARGS
];
1331 unsigned long option
;
1337 token
= match_token(data
, cifs_mount_option_tokens
, args
);
1341 /* Ingnore the following */
1345 /* Boolean values */
1346 case Opt_user_xattr
:
1349 case Opt_nouser_xattr
:
1355 case Opt_noforceuid
:
1361 case Opt_noforcegid
:
1364 case Opt_noblocksend
:
1365 vol
->noblocksnd
= 1;
1367 case Opt_noautotune
:
1368 vol
->noautotune
= 1;
1383 vol
->sfu_remap
= true;
1384 vol
->remap
= false; /* disable SFM mapping */
1386 case Opt_nomapchars
:
1387 vol
->sfu_remap
= false;
1391 vol
->sfu_remap
= false; /* disable SFU mapping */
1393 case Opt_nomapposix
:
1405 case Opt_posixpaths
:
1406 vol
->posix_paths
= 1;
1408 case Opt_noposixpaths
:
1409 vol
->posix_paths
= 0;
1412 vol
->no_linux_ext
= 1;
1423 * turn off mandatory locking in mode
1424 * if remote locking is turned off since the
1425 * local vfs will do advisory
1427 if (vol
->file_mode
==
1428 (S_IALLUGO
& ~(S_ISUID
| S_IXGRP
)))
1429 vol
->file_mode
= S_IALLUGO
;
1431 case Opt_forcemandatorylock
:
1440 case Opt_setuidfromacl
:
1441 vol
->setuidfromacl
= 1;
1444 vol
->dynperm
= true;
1447 vol
->dynperm
= false;
1461 case Opt_nostrictsync
:
1462 vol
->nostrictsync
= 1;
1464 case Opt_strictsync
:
1465 vol
->nostrictsync
= 0;
1468 vol
->server_ino
= 1;
1470 case Opt_noserverino
:
1471 vol
->server_ino
= 0;
1473 case Opt_rwpidforward
:
1474 vol
->rwpidforward
= 1;
1483 vol
->no_psx_acl
= 0;
1486 vol
->no_psx_acl
= 1;
1488 case Opt_locallease
:
1489 vol
->local_lease
= 1;
1495 /* we do not do the following in secFlags because seal
1496 * is a per tree connection (mount) not a per socket
1497 * or per-smb connection option in the protocol
1498 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1503 pr_warn("CIFS: Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n");
1506 #ifndef CONFIG_CIFS_FSCACHE
1507 cifs_dbg(VFS
, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n");
1508 goto cifs_parse_mount_err
;
1512 case Opt_mfsymlinks
:
1513 vol
->mfsymlinks
= true;
1516 vol
->multiuser
= true;
1521 case Opt_nosharesock
:
1522 vol
->nosharesock
= true;
1524 case Opt_nopersistent
:
1525 vol
->nopersistent
= true;
1526 if (vol
->persistent
) {
1528 "persistenthandles mount options conflict\n");
1529 goto cifs_parse_mount_err
;
1532 case Opt_persistent
:
1533 vol
->persistent
= true;
1534 if ((vol
->nopersistent
) || (vol
->resilient
)) {
1536 "persistenthandles mount options conflict\n");
1537 goto cifs_parse_mount_err
;
1541 vol
->resilient
= true;
1542 if (vol
->persistent
) {
1544 "persistenthandles mount options conflict\n");
1545 goto cifs_parse_mount_err
;
1548 case Opt_noresilient
:
1549 vol
->resilient
= false; /* already the default */
1551 case Opt_domainauto
:
1552 vol
->domainauto
= true;
1555 /* Numeric Values */
1557 if (get_option_uid(args
, &vol
->backupuid
)) {
1558 cifs_dbg(VFS
, "%s: Invalid backupuid value\n",
1560 goto cifs_parse_mount_err
;
1562 vol
->backupuid_specified
= true;
1565 if (get_option_gid(args
, &vol
->backupgid
)) {
1566 cifs_dbg(VFS
, "%s: Invalid backupgid value\n",
1568 goto cifs_parse_mount_err
;
1570 vol
->backupgid_specified
= true;
1573 if (get_option_uid(args
, &vol
->linux_uid
)) {
1574 cifs_dbg(VFS
, "%s: Invalid uid value\n",
1576 goto cifs_parse_mount_err
;
1578 uid_specified
= true;
1581 if (get_option_uid(args
, &vol
->cred_uid
)) {
1582 cifs_dbg(VFS
, "%s: Invalid cruid value\n",
1584 goto cifs_parse_mount_err
;
1588 if (get_option_gid(args
, &vol
->linux_gid
)) {
1589 cifs_dbg(VFS
, "%s: Invalid gid value\n",
1591 goto cifs_parse_mount_err
;
1593 gid_specified
= true;
1596 if (get_option_ul(args
, &option
)) {
1597 cifs_dbg(VFS
, "%s: Invalid file_mode value\n",
1599 goto cifs_parse_mount_err
;
1601 vol
->file_mode
= option
;
1604 if (get_option_ul(args
, &option
)) {
1605 cifs_dbg(VFS
, "%s: Invalid dir_mode value\n",
1607 goto cifs_parse_mount_err
;
1609 vol
->dir_mode
= option
;
1612 if (get_option_ul(args
, &option
) ||
1613 option
> USHRT_MAX
) {
1614 cifs_dbg(VFS
, "%s: Invalid port value\n",
1616 goto cifs_parse_mount_err
;
1618 port
= (unsigned short)option
;
1621 if (get_option_ul(args
, &option
)) {
1622 cifs_dbg(VFS
, "%s: Invalid rsize value\n",
1624 goto cifs_parse_mount_err
;
1626 vol
->rsize
= option
;
1629 if (get_option_ul(args
, &option
)) {
1630 cifs_dbg(VFS
, "%s: Invalid wsize value\n",
1632 goto cifs_parse_mount_err
;
1634 vol
->wsize
= option
;
1637 if (get_option_ul(args
, &option
)) {
1638 cifs_dbg(VFS
, "%s: Invalid actimeo value\n",
1640 goto cifs_parse_mount_err
;
1642 vol
->actimeo
= HZ
* option
;
1643 if (vol
->actimeo
> CIFS_MAX_ACTIMEO
) {
1644 cifs_dbg(VFS
, "attribute cache timeout too large\n");
1645 goto cifs_parse_mount_err
;
1648 case Opt_echo_interval
:
1649 if (get_option_ul(args
, &option
)) {
1650 cifs_dbg(VFS
, "%s: Invalid echo interval value\n",
1652 goto cifs_parse_mount_err
;
1654 vol
->echo_interval
= option
;
1657 if (get_option_ul(args
, &option
)) {
1658 cifs_dbg(VFS
, "%s: Invalid snapshot time\n",
1660 goto cifs_parse_mount_err
;
1662 vol
->snapshot_time
= option
;
1664 case Opt_max_credits
:
1665 if (get_option_ul(args
, &option
) || (option
< 20) ||
1667 cifs_dbg(VFS
, "%s: Invalid max_credits value\n",
1669 goto cifs_parse_mount_err
;
1671 vol
->max_credits
= option
;
1674 /* String Arguments */
1676 case Opt_blank_user
:
1677 /* null user, ie. anonymous authentication */
1679 vol
->username
= NULL
;
1682 string
= match_strdup(args
);
1686 if (strnlen(string
, CIFS_MAX_USERNAME_LEN
) >
1687 CIFS_MAX_USERNAME_LEN
) {
1688 pr_warn("CIFS: username too long\n");
1689 goto cifs_parse_mount_err
;
1692 kfree(vol
->username
);
1693 vol
->username
= kstrdup(string
, GFP_KERNEL
);
1695 goto cifs_parse_mount_err
;
1697 case Opt_blank_pass
:
1698 /* passwords have to be handled differently
1699 * to allow the character used for deliminator
1700 * to be passed within them
1704 * Check if this is a case where the password
1705 * starts with a delimiter
1707 tmp_end
= strchr(data
, '=');
1709 if (!(tmp_end
< end
&& tmp_end
[1] == delim
)) {
1710 /* No it is not. Set the password to NULL */
1711 kzfree(vol
->password
);
1712 vol
->password
= NULL
;
1715 /* Yes it is. Drop down to Opt_pass below.*/
1717 /* Obtain the value string */
1718 value
= strchr(data
, '=');
1721 /* Set tmp_end to end of the string */
1722 tmp_end
= (char *) value
+ strlen(value
);
1724 /* Check if following character is the deliminator
1725 * If yes, we have encountered a double deliminator
1726 * reset the NULL character to the deliminator
1728 if (tmp_end
< end
&& tmp_end
[1] == delim
) {
1731 /* Keep iterating until we get to a single
1732 * deliminator OR the end
1734 while ((tmp_end
= strchr(tmp_end
, delim
))
1735 != NULL
&& (tmp_end
[1] == delim
)) {
1736 tmp_end
= (char *) &tmp_end
[2];
1739 /* Reset var options to point to next element */
1742 options
= (char *) &tmp_end
[1];
1744 /* Reached the end of the mount option
1749 kzfree(vol
->password
);
1750 /* Now build new password string */
1751 temp_len
= strlen(value
);
1752 vol
->password
= kzalloc(temp_len
+1, GFP_KERNEL
);
1753 if (vol
->password
== NULL
) {
1754 pr_warn("CIFS: no memory for password\n");
1755 goto cifs_parse_mount_err
;
1758 for (i
= 0, j
= 0; i
< temp_len
; i
++, j
++) {
1759 vol
->password
[j
] = value
[i
];
1760 if ((value
[i
] == delim
) &&
1761 value
[i
+1] == delim
)
1762 /* skip the second deliminator */
1765 vol
->password
[j
] = '\0';
1768 /* FIXME: should this be an error instead? */
1772 string
= match_strdup(args
);
1776 if (!cifs_convert_address(dstaddr
, string
,
1778 pr_err("CIFS: bad ip= option (%s).\n", string
);
1779 goto cifs_parse_mount_err
;
1784 string
= match_strdup(args
);
1788 if (strnlen(string
, CIFS_MAX_DOMAINNAME_LEN
)
1789 == CIFS_MAX_DOMAINNAME_LEN
) {
1790 pr_warn("CIFS: domain name too long\n");
1791 goto cifs_parse_mount_err
;
1794 kfree(vol
->domainname
);
1795 vol
->domainname
= kstrdup(string
, GFP_KERNEL
);
1796 if (!vol
->domainname
) {
1797 pr_warn("CIFS: no memory for domainname\n");
1798 goto cifs_parse_mount_err
;
1800 cifs_dbg(FYI
, "Domain name set\n");
1803 string
= match_strdup(args
);
1807 if (!cifs_convert_address(
1808 (struct sockaddr
*)&vol
->srcaddr
,
1809 string
, strlen(string
))) {
1810 pr_warn("CIFS: Could not parse srcaddr: %s\n",
1812 goto cifs_parse_mount_err
;
1816 string
= match_strdup(args
);
1820 if (strnlen(string
, 1024) >= 65) {
1821 pr_warn("CIFS: iocharset name too long.\n");
1822 goto cifs_parse_mount_err
;
1825 if (strncasecmp(string
, "default", 7) != 0) {
1826 kfree(vol
->iocharset
);
1827 vol
->iocharset
= kstrdup(string
,
1829 if (!vol
->iocharset
) {
1830 pr_warn("CIFS: no memory for charset\n");
1831 goto cifs_parse_mount_err
;
1834 /* if iocharset not set then load_nls_default
1837 cifs_dbg(FYI
, "iocharset set to %s\n", string
);
1839 case Opt_netbiosname
:
1840 string
= match_strdup(args
);
1844 memset(vol
->source_rfc1001_name
, 0x20,
1847 * FIXME: are there cases in which a comma can
1848 * be valid in workstation netbios name (and
1849 * need special handling)?
1851 for (i
= 0; i
< RFC1001_NAME_LEN
; i
++) {
1852 /* don't ucase netbiosname for user */
1855 vol
->source_rfc1001_name
[i
] = string
[i
];
1857 /* The string has 16th byte zero still from
1858 * set at top of the function
1860 if (i
== RFC1001_NAME_LEN
&& string
[i
] != 0)
1861 pr_warn("CIFS: netbiosname longer than 15 truncated.\n");
1864 /* servernetbiosname specified override *SMBSERVER */
1865 string
= match_strdup(args
);
1869 /* last byte, type, is 0x20 for servr type */
1870 memset(vol
->target_rfc1001_name
, 0x20,
1871 RFC1001_NAME_LEN_WITH_NULL
);
1873 /* BB are there cases in which a comma can be
1874 valid in this workstation netbios name
1875 (and need special handling)? */
1877 /* user or mount helper must uppercase the
1879 for (i
= 0; i
< 15; i
++) {
1882 vol
->target_rfc1001_name
[i
] = string
[i
];
1884 /* The string has 16th byte zero still from
1885 set at top of the function */
1886 if (i
== RFC1001_NAME_LEN
&& string
[i
] != 0)
1887 pr_warn("CIFS: server netbiosname longer than 15 truncated.\n");
1890 /* version of mount userspace tools, not dialect */
1891 string
= match_strdup(args
);
1895 /* If interface changes in mount.cifs bump to new ver */
1896 if (strncasecmp(string
, "1", 1) == 0) {
1897 if (strlen(string
) > 1) {
1898 pr_warn("Bad mount helper ver=%s. Did "
1899 "you want SMB1 (CIFS) dialect "
1900 "and mean to type vers=1.0 "
1901 "instead?\n", string
);
1902 goto cifs_parse_mount_err
;
1904 /* This is the default */
1907 /* For all other value, error */
1908 pr_warn("CIFS: Invalid mount helper version specified\n");
1909 goto cifs_parse_mount_err
;
1911 /* protocol version (dialect) */
1912 string
= match_strdup(args
);
1916 if (cifs_parse_smb_version(string
, vol
) != 0)
1917 goto cifs_parse_mount_err
;
1921 string
= match_strdup(args
);
1925 if (cifs_parse_security_flavors(string
, vol
) != 0)
1926 goto cifs_parse_mount_err
;
1929 string
= match_strdup(args
);
1933 if (cifs_parse_cache_flavor(string
, vol
) != 0)
1934 goto cifs_parse_mount_err
;
1938 * An option we don't recognize. Save it off for later
1939 * if we haven't already found one
1945 /* Free up any allocated string */
1950 if (!sloppy
&& invalid
) {
1951 pr_err("CIFS: Unknown mount option \"%s\"\n", invalid
);
1952 goto cifs_parse_mount_err
;
1956 /* Muliuser mounts require CONFIG_KEYS support */
1957 if (vol
->multiuser
) {
1958 cifs_dbg(VFS
, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n");
1959 goto cifs_parse_mount_err
;
1963 cifs_dbg(VFS
, "CIFS mount error: No usable UNC path provided in device string!\n");
1964 goto cifs_parse_mount_err
;
1967 /* make sure UNC has a share name */
1968 if (!strchr(vol
->UNC
+ 3, '\\')) {
1969 cifs_dbg(VFS
, "Malformed UNC. Unable to find share name.\n");
1970 goto cifs_parse_mount_err
;
1977 /* No ip= option specified? Try to get it from UNC */
1978 /* Use the address part of the UNC. */
1979 slash
= strchr(&vol
->UNC
[2], '\\');
1980 len
= slash
- &vol
->UNC
[2];
1981 if (!cifs_convert_address(dstaddr
, &vol
->UNC
[2], len
)) {
1982 pr_err("Unable to determine destination address.\n");
1983 goto cifs_parse_mount_err
;
1987 /* set the port that we got earlier */
1988 cifs_set_port(dstaddr
, port
);
1991 vol
->override_uid
= override_uid
;
1992 else if (override_uid
== 1)
1993 pr_notice("CIFS: ignoring forceuid mount option specified with no uid= option.\n");
1996 vol
->override_gid
= override_gid
;
1997 else if (override_gid
== 1)
1998 pr_notice("CIFS: ignoring forcegid mount option specified with no gid= option.\n");
2000 if (got_version
== false)
2001 pr_warn("No dialect specified on mount. Default has changed to "
2002 "a more secure dialect, SMB2.1 or later (e.g. SMB3), from CIFS "
2003 "(SMB1). To use the less secure SMB1 dialect to access "
2004 "old servers which do not support SMB3 (or SMB2.1) specify vers=1.0"
2007 kfree(mountdata_copy
);
2011 pr_warn("Could not allocate temporary buffer\n");
2012 cifs_parse_mount_err
:
2014 kfree(mountdata_copy
);
2018 /** Returns true if srcaddr isn't specified and rhs isn't
2019 * specified, or if srcaddr is specified and
2020 * matches the IP address of the rhs argument.
2023 srcip_matches(struct sockaddr
*srcaddr
, struct sockaddr
*rhs
)
2025 switch (srcaddr
->sa_family
) {
2027 return (rhs
->sa_family
== AF_UNSPEC
);
2029 struct sockaddr_in
*saddr4
= (struct sockaddr_in
*)srcaddr
;
2030 struct sockaddr_in
*vaddr4
= (struct sockaddr_in
*)rhs
;
2031 return (saddr4
->sin_addr
.s_addr
== vaddr4
->sin_addr
.s_addr
);
2034 struct sockaddr_in6
*saddr6
= (struct sockaddr_in6
*)srcaddr
;
2035 struct sockaddr_in6
*vaddr6
= (struct sockaddr_in6
*)rhs
;
2036 return ipv6_addr_equal(&saddr6
->sin6_addr
, &vaddr6
->sin6_addr
);
2040 return false; /* don't expect to be here */
2045 * If no port is specified in addr structure, we try to match with 445 port
2046 * and if it fails - with 139 ports. It should be called only if address
2047 * families of server and addr are equal.
2050 match_port(struct TCP_Server_Info
*server
, struct sockaddr
*addr
)
2052 __be16 port
, *sport
;
2054 switch (addr
->sa_family
) {
2056 sport
= &((struct sockaddr_in
*) &server
->dstaddr
)->sin_port
;
2057 port
= ((struct sockaddr_in
*) addr
)->sin_port
;
2060 sport
= &((struct sockaddr_in6
*) &server
->dstaddr
)->sin6_port
;
2061 port
= ((struct sockaddr_in6
*) addr
)->sin6_port
;
2069 port
= htons(CIFS_PORT
);
2073 port
= htons(RFC1001_PORT
);
2076 return port
== *sport
;
2080 match_address(struct TCP_Server_Info
*server
, struct sockaddr
*addr
,
2081 struct sockaddr
*srcaddr
)
2083 switch (addr
->sa_family
) {
2085 struct sockaddr_in
*addr4
= (struct sockaddr_in
*)addr
;
2086 struct sockaddr_in
*srv_addr4
=
2087 (struct sockaddr_in
*)&server
->dstaddr
;
2089 if (addr4
->sin_addr
.s_addr
!= srv_addr4
->sin_addr
.s_addr
)
2094 struct sockaddr_in6
*addr6
= (struct sockaddr_in6
*)addr
;
2095 struct sockaddr_in6
*srv_addr6
=
2096 (struct sockaddr_in6
*)&server
->dstaddr
;
2098 if (!ipv6_addr_equal(&addr6
->sin6_addr
,
2099 &srv_addr6
->sin6_addr
))
2101 if (addr6
->sin6_scope_id
!= srv_addr6
->sin6_scope_id
)
2107 return false; /* don't expect to be here */
2110 if (!srcip_matches(srcaddr
, (struct sockaddr
*)&server
->srcaddr
))
2117 match_security(struct TCP_Server_Info
*server
, struct smb_vol
*vol
)
2120 * The select_sectype function should either return the vol->sectype
2121 * that was specified, or "Unspecified" if that sectype was not
2122 * compatible with the given NEGOTIATE request.
2124 if (server
->ops
->select_sectype(server
, vol
->sectype
)
2129 * Now check if signing mode is acceptable. No need to check
2130 * global_secflags at this point since if MUST_SIGN is set then
2131 * the server->sign had better be too.
2133 if (vol
->sign
&& !server
->sign
)
2139 static int match_server(struct TCP_Server_Info
*server
, struct smb_vol
*vol
)
2141 struct sockaddr
*addr
= (struct sockaddr
*)&vol
->dstaddr
;
2143 if (vol
->nosharesock
)
2146 /* BB update this for smb3any and default case */
2147 if ((server
->vals
!= vol
->vals
) || (server
->ops
!= vol
->ops
))
2150 if (!net_eq(cifs_net_ns(server
), current
->nsproxy
->net_ns
))
2153 if (!match_address(server
, addr
,
2154 (struct sockaddr
*)&vol
->srcaddr
))
2157 if (!match_port(server
, addr
))
2160 if (!match_security(server
, vol
))
2163 if (server
->echo_interval
!= vol
->echo_interval
* HZ
)
2169 static struct TCP_Server_Info
*
2170 cifs_find_tcp_session(struct smb_vol
*vol
)
2172 struct TCP_Server_Info
*server
;
2174 spin_lock(&cifs_tcp_ses_lock
);
2175 list_for_each_entry(server
, &cifs_tcp_ses_list
, tcp_ses_list
) {
2176 if (!match_server(server
, vol
))
2179 ++server
->srv_count
;
2180 spin_unlock(&cifs_tcp_ses_lock
);
2181 cifs_dbg(FYI
, "Existing tcp session with server found\n");
2184 spin_unlock(&cifs_tcp_ses_lock
);
2189 cifs_put_tcp_session(struct TCP_Server_Info
*server
, int from_reconnect
)
2191 struct task_struct
*task
;
2193 spin_lock(&cifs_tcp_ses_lock
);
2194 if (--server
->srv_count
> 0) {
2195 spin_unlock(&cifs_tcp_ses_lock
);
2199 put_net(cifs_net_ns(server
));
2201 list_del_init(&server
->tcp_ses_list
);
2202 spin_unlock(&cifs_tcp_ses_lock
);
2204 cancel_delayed_work_sync(&server
->echo
);
2208 * Avoid deadlock here: reconnect work calls
2209 * cifs_put_tcp_session() at its end. Need to be sure
2210 * that reconnect work does nothing with server pointer after
2213 cancel_delayed_work(&server
->reconnect
);
2215 cancel_delayed_work_sync(&server
->reconnect
);
2217 spin_lock(&GlobalMid_Lock
);
2218 server
->tcpStatus
= CifsExiting
;
2219 spin_unlock(&GlobalMid_Lock
);
2221 cifs_crypto_secmech_release(server
);
2222 cifs_fscache_release_client_cookie(server
);
2224 kfree(server
->session_key
.response
);
2225 server
->session_key
.response
= NULL
;
2226 server
->session_key
.len
= 0;
2228 task
= xchg(&server
->tsk
, NULL
);
2230 force_sig(SIGKILL
, task
);
2233 static struct TCP_Server_Info
*
2234 cifs_get_tcp_session(struct smb_vol
*volume_info
)
2236 struct TCP_Server_Info
*tcp_ses
= NULL
;
2239 cifs_dbg(FYI
, "UNC: %s\n", volume_info
->UNC
);
2241 /* see if we already have a matching tcp_ses */
2242 tcp_ses
= cifs_find_tcp_session(volume_info
);
2246 tcp_ses
= kzalloc(sizeof(struct TCP_Server_Info
), GFP_KERNEL
);
2252 tcp_ses
->ops
= volume_info
->ops
;
2253 tcp_ses
->vals
= volume_info
->vals
;
2254 cifs_set_net_ns(tcp_ses
, get_net(current
->nsproxy
->net_ns
));
2255 tcp_ses
->hostname
= extract_hostname(volume_info
->UNC
);
2256 if (IS_ERR(tcp_ses
->hostname
)) {
2257 rc
= PTR_ERR(tcp_ses
->hostname
);
2258 goto out_err_crypto_release
;
2261 tcp_ses
->noblocksnd
= volume_info
->noblocksnd
;
2262 tcp_ses
->noautotune
= volume_info
->noautotune
;
2263 tcp_ses
->tcp_nodelay
= volume_info
->sockopt_tcp_nodelay
;
2264 tcp_ses
->in_flight
= 0;
2265 tcp_ses
->credits
= 1;
2266 init_waitqueue_head(&tcp_ses
->response_q
);
2267 init_waitqueue_head(&tcp_ses
->request_q
);
2268 INIT_LIST_HEAD(&tcp_ses
->pending_mid_q
);
2269 mutex_init(&tcp_ses
->srv_mutex
);
2270 memcpy(tcp_ses
->workstation_RFC1001_name
,
2271 volume_info
->source_rfc1001_name
, RFC1001_NAME_LEN_WITH_NULL
);
2272 memcpy(tcp_ses
->server_RFC1001_name
,
2273 volume_info
->target_rfc1001_name
, RFC1001_NAME_LEN_WITH_NULL
);
2274 tcp_ses
->session_estab
= false;
2275 tcp_ses
->sequence_number
= 0;
2276 tcp_ses
->lstrp
= jiffies
;
2277 spin_lock_init(&tcp_ses
->req_lock
);
2278 INIT_LIST_HEAD(&tcp_ses
->tcp_ses_list
);
2279 INIT_LIST_HEAD(&tcp_ses
->smb_ses_list
);
2280 INIT_DELAYED_WORK(&tcp_ses
->echo
, cifs_echo_request
);
2281 INIT_DELAYED_WORK(&tcp_ses
->reconnect
, smb2_reconnect_server
);
2282 mutex_init(&tcp_ses
->reconnect_mutex
);
2283 memcpy(&tcp_ses
->srcaddr
, &volume_info
->srcaddr
,
2284 sizeof(tcp_ses
->srcaddr
));
2285 memcpy(&tcp_ses
->dstaddr
, &volume_info
->dstaddr
,
2286 sizeof(tcp_ses
->dstaddr
));
2287 generate_random_uuid(tcp_ses
->client_guid
);
2289 * at this point we are the only ones with the pointer
2290 * to the struct since the kernel thread not created yet
2291 * no need to spinlock this init of tcpStatus or srv_count
2293 tcp_ses
->tcpStatus
= CifsNew
;
2294 ++tcp_ses
->srv_count
;
2296 if (volume_info
->echo_interval
>= SMB_ECHO_INTERVAL_MIN
&&
2297 volume_info
->echo_interval
<= SMB_ECHO_INTERVAL_MAX
)
2298 tcp_ses
->echo_interval
= volume_info
->echo_interval
* HZ
;
2300 tcp_ses
->echo_interval
= SMB_ECHO_INTERVAL_DEFAULT
* HZ
;
2302 rc
= ip_connect(tcp_ses
);
2304 cifs_dbg(VFS
, "Error connecting to socket. Aborting operation.\n");
2305 goto out_err_crypto_release
;
2309 * since we're in a cifs function already, we know that
2310 * this will succeed. No need for try_module_get().
2312 __module_get(THIS_MODULE
);
2313 tcp_ses
->tsk
= kthread_run(cifs_demultiplex_thread
,
2315 if (IS_ERR(tcp_ses
->tsk
)) {
2316 rc
= PTR_ERR(tcp_ses
->tsk
);
2317 cifs_dbg(VFS
, "error %d create cifsd thread\n", rc
);
2318 module_put(THIS_MODULE
);
2319 goto out_err_crypto_release
;
2321 tcp_ses
->tcpStatus
= CifsNeedNegotiate
;
2323 /* thread spawned, put it on the list */
2324 spin_lock(&cifs_tcp_ses_lock
);
2325 list_add(&tcp_ses
->tcp_ses_list
, &cifs_tcp_ses_list
);
2326 spin_unlock(&cifs_tcp_ses_lock
);
2328 cifs_fscache_get_client_cookie(tcp_ses
);
2330 /* queue echo request delayed work */
2331 queue_delayed_work(cifsiod_wq
, &tcp_ses
->echo
, tcp_ses
->echo_interval
);
2335 out_err_crypto_release
:
2336 cifs_crypto_secmech_release(tcp_ses
);
2338 put_net(cifs_net_ns(tcp_ses
));
2342 if (!IS_ERR(tcp_ses
->hostname
))
2343 kfree(tcp_ses
->hostname
);
2344 if (tcp_ses
->ssocket
)
2345 sock_release(tcp_ses
->ssocket
);
2351 static int match_session(struct cifs_ses
*ses
, struct smb_vol
*vol
)
2353 if (vol
->sectype
!= Unspecified
&&
2354 vol
->sectype
!= ses
->sectype
)
2357 switch (ses
->sectype
) {
2359 if (!uid_eq(vol
->cred_uid
, ses
->cred_uid
))
2363 /* NULL username means anonymous session */
2364 if (ses
->user_name
== NULL
) {
2370 /* anything else takes username/password */
2371 if (strncmp(ses
->user_name
,
2372 vol
->username
? vol
->username
: "",
2373 CIFS_MAX_USERNAME_LEN
))
2375 if ((vol
->username
&& strlen(vol
->username
) != 0) &&
2376 ses
->password
!= NULL
&&
2377 strncmp(ses
->password
,
2378 vol
->password
? vol
->password
: "",
2379 CIFS_MAX_PASSWORD_LEN
))
2386 * cifs_setup_ipc - helper to setup the IPC tcon for the session
2388 * A new IPC connection is made and stored in the session
2389 * tcon_ipc. The IPC tcon has the same lifetime as the session.
2392 cifs_setup_ipc(struct cifs_ses
*ses
, struct smb_vol
*volume_info
)
2395 struct cifs_tcon
*tcon
;
2396 struct nls_table
*nls_codepage
;
2397 char unc
[SERVER_NAME_LENGTH
+ sizeof("//x/IPC$")] = {0};
2401 * If the mount request that resulted in the creation of the
2402 * session requires encryption, force IPC to be encrypted too.
2404 if (volume_info
->seal
) {
2405 if (ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
)
2409 "IPC: server doesn't support encryption\n");
2414 tcon
= tconInfoAlloc();
2418 snprintf(unc
, sizeof(unc
), "\\\\%s\\IPC$", ses
->serverName
);
2421 nls_codepage
= load_nls_default();
2427 rc
= ses
->server
->ops
->tree_connect(xid
, ses
, unc
, tcon
, nls_codepage
);
2431 cifs_dbg(VFS
, "failed to connect to IPC (rc=%d)\n", rc
);
2436 cifs_dbg(FYI
, "IPC tcon rc = %d ipc tid = %d\n", rc
, tcon
->tid
);
2438 ses
->tcon_ipc
= tcon
;
2440 unload_nls(nls_codepage
);
2445 * cifs_free_ipc - helper to release the session IPC tcon
2447 * Needs to be called everytime a session is destroyed
2450 cifs_free_ipc(struct cifs_ses
*ses
)
2453 struct cifs_tcon
*tcon
= ses
->tcon_ipc
;
2458 if (ses
->server
->ops
->tree_disconnect
) {
2460 rc
= ses
->server
->ops
->tree_disconnect(xid
, tcon
);
2465 cifs_dbg(FYI
, "failed to disconnect IPC tcon (rc=%d)\n", rc
);
2468 ses
->tcon_ipc
= NULL
;
2472 static struct cifs_ses
*
2473 cifs_find_smb_ses(struct TCP_Server_Info
*server
, struct smb_vol
*vol
)
2475 struct cifs_ses
*ses
;
2477 spin_lock(&cifs_tcp_ses_lock
);
2478 list_for_each_entry(ses
, &server
->smb_ses_list
, smb_ses_list
) {
2479 if (ses
->status
== CifsExiting
)
2481 if (!match_session(ses
, vol
))
2484 spin_unlock(&cifs_tcp_ses_lock
);
2487 spin_unlock(&cifs_tcp_ses_lock
);
2492 cifs_put_smb_ses(struct cifs_ses
*ses
)
2494 unsigned int rc
, xid
;
2495 struct TCP_Server_Info
*server
= ses
->server
;
2497 cifs_dbg(FYI
, "%s: ses_count=%d\n", __func__
, ses
->ses_count
);
2499 spin_lock(&cifs_tcp_ses_lock
);
2500 if (ses
->status
== CifsExiting
) {
2501 spin_unlock(&cifs_tcp_ses_lock
);
2504 if (--ses
->ses_count
> 0) {
2505 spin_unlock(&cifs_tcp_ses_lock
);
2508 if (ses
->status
== CifsGood
)
2509 ses
->status
= CifsExiting
;
2510 spin_unlock(&cifs_tcp_ses_lock
);
2514 if (ses
->status
== CifsExiting
&& server
->ops
->logoff
) {
2516 rc
= server
->ops
->logoff(xid
, ses
);
2518 cifs_dbg(VFS
, "%s: Session Logoff failure rc=%d\n",
2523 spin_lock(&cifs_tcp_ses_lock
);
2524 list_del_init(&ses
->smb_ses_list
);
2525 spin_unlock(&cifs_tcp_ses_lock
);
2528 cifs_put_tcp_session(server
, 0);
2533 /* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */
2534 #define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1)
2536 /* Populate username and pw fields from keyring if possible */
2538 cifs_set_cifscreds(struct smb_vol
*vol
, struct cifs_ses
*ses
)
2541 const char *delim
, *payload
;
2545 struct TCP_Server_Info
*server
= ses
->server
;
2546 struct sockaddr_in
*sa
;
2547 struct sockaddr_in6
*sa6
;
2548 const struct user_key_payload
*upayload
;
2550 desc
= kmalloc(CIFSCREDS_DESC_SIZE
, GFP_KERNEL
);
2554 /* try to find an address key first */
2555 switch (server
->dstaddr
.ss_family
) {
2557 sa
= (struct sockaddr_in
*)&server
->dstaddr
;
2558 sprintf(desc
, "cifs:a:%pI4", &sa
->sin_addr
.s_addr
);
2561 sa6
= (struct sockaddr_in6
*)&server
->dstaddr
;
2562 sprintf(desc
, "cifs:a:%pI6c", &sa6
->sin6_addr
.s6_addr
);
2565 cifs_dbg(FYI
, "Bad ss_family (%hu)\n",
2566 server
->dstaddr
.ss_family
);
2571 cifs_dbg(FYI
, "%s: desc=%s\n", __func__
, desc
);
2572 key
= request_key(&key_type_logon
, desc
, "");
2574 if (!ses
->domainName
) {
2575 cifs_dbg(FYI
, "domainName is NULL\n");
2580 /* didn't work, try to find a domain key */
2581 sprintf(desc
, "cifs:d:%s", ses
->domainName
);
2582 cifs_dbg(FYI
, "%s: desc=%s\n", __func__
, desc
);
2583 key
= request_key(&key_type_logon
, desc
, "");
2590 down_read(&key
->sem
);
2591 upayload
= user_key_payload_locked(key
);
2592 if (IS_ERR_OR_NULL(upayload
)) {
2593 rc
= upayload
? PTR_ERR(upayload
) : -EINVAL
;
2597 /* find first : in payload */
2598 payload
= upayload
->data
;
2599 delim
= strnchr(payload
, upayload
->datalen
, ':');
2600 cifs_dbg(FYI
, "payload=%s\n", payload
);
2602 cifs_dbg(FYI
, "Unable to find ':' in payload (datalen=%d)\n",
2608 len
= delim
- payload
;
2609 if (len
> CIFS_MAX_USERNAME_LEN
|| len
<= 0) {
2610 cifs_dbg(FYI
, "Bad value from username search (len=%zd)\n",
2616 vol
->username
= kstrndup(payload
, len
, GFP_KERNEL
);
2617 if (!vol
->username
) {
2618 cifs_dbg(FYI
, "Unable to allocate %zd bytes for username\n",
2623 cifs_dbg(FYI
, "%s: username=%s\n", __func__
, vol
->username
);
2625 len
= key
->datalen
- (len
+ 1);
2626 if (len
> CIFS_MAX_PASSWORD_LEN
|| len
<= 0) {
2627 cifs_dbg(FYI
, "Bad len for password search (len=%zd)\n", len
);
2629 kfree(vol
->username
);
2630 vol
->username
= NULL
;
2635 vol
->password
= kstrndup(delim
, len
, GFP_KERNEL
);
2636 if (!vol
->password
) {
2637 cifs_dbg(FYI
, "Unable to allocate %zd bytes for password\n",
2640 kfree(vol
->username
);
2641 vol
->username
= NULL
;
2650 cifs_dbg(FYI
, "%s: returning %d\n", __func__
, rc
);
2653 #else /* ! CONFIG_KEYS */
2655 cifs_set_cifscreds(struct smb_vol
*vol
__attribute__((unused
)),
2656 struct cifs_ses
*ses
__attribute__((unused
)))
2660 #endif /* CONFIG_KEYS */
2662 static struct cifs_ses
*
2663 cifs_get_smb_ses(struct TCP_Server_Info
*server
, struct smb_vol
*volume_info
)
2667 struct cifs_ses
*ses
;
2668 struct sockaddr_in
*addr
= (struct sockaddr_in
*)&server
->dstaddr
;
2669 struct sockaddr_in6
*addr6
= (struct sockaddr_in6
*)&server
->dstaddr
;
2673 ses
= cifs_find_smb_ses(server
, volume_info
);
2675 cifs_dbg(FYI
, "Existing smb sess found (status=%d)\n",
2678 mutex_lock(&ses
->session_mutex
);
2679 rc
= cifs_negotiate_protocol(xid
, ses
);
2681 mutex_unlock(&ses
->session_mutex
);
2682 /* problem -- put our ses reference */
2683 cifs_put_smb_ses(ses
);
2687 if (ses
->need_reconnect
) {
2688 cifs_dbg(FYI
, "Session needs reconnect\n");
2689 rc
= cifs_setup_session(xid
, ses
,
2690 volume_info
->local_nls
);
2692 mutex_unlock(&ses
->session_mutex
);
2693 /* problem -- put our reference */
2694 cifs_put_smb_ses(ses
);
2699 mutex_unlock(&ses
->session_mutex
);
2701 /* existing SMB ses has a server reference already */
2702 cifs_put_tcp_session(server
, 0);
2707 cifs_dbg(FYI
, "Existing smb sess not found\n");
2708 ses
= sesInfoAlloc();
2712 /* new SMB session uses our server ref */
2713 ses
->server
= server
;
2714 if (server
->dstaddr
.ss_family
== AF_INET6
)
2715 sprintf(ses
->serverName
, "%pI6", &addr6
->sin6_addr
);
2717 sprintf(ses
->serverName
, "%pI4", &addr
->sin_addr
);
2719 if (volume_info
->username
) {
2720 ses
->user_name
= kstrdup(volume_info
->username
, GFP_KERNEL
);
2721 if (!ses
->user_name
)
2725 /* volume_info->password freed at unmount */
2726 if (volume_info
->password
) {
2727 ses
->password
= kstrdup(volume_info
->password
, GFP_KERNEL
);
2731 if (volume_info
->domainname
) {
2732 ses
->domainName
= kstrdup(volume_info
->domainname
, GFP_KERNEL
);
2733 if (!ses
->domainName
)
2736 if (volume_info
->domainauto
)
2737 ses
->domainAuto
= volume_info
->domainauto
;
2738 ses
->cred_uid
= volume_info
->cred_uid
;
2739 ses
->linux_uid
= volume_info
->linux_uid
;
2741 ses
->sectype
= volume_info
->sectype
;
2742 ses
->sign
= volume_info
->sign
;
2744 mutex_lock(&ses
->session_mutex
);
2745 rc
= cifs_negotiate_protocol(xid
, ses
);
2747 rc
= cifs_setup_session(xid
, ses
, volume_info
->local_nls
);
2748 mutex_unlock(&ses
->session_mutex
);
2752 /* success, put it on the list */
2753 spin_lock(&cifs_tcp_ses_lock
);
2754 list_add(&ses
->smb_ses_list
, &server
->smb_ses_list
);
2755 spin_unlock(&cifs_tcp_ses_lock
);
2759 cifs_setup_ipc(ses
, volume_info
);
2769 static int match_tcon(struct cifs_tcon
*tcon
, struct smb_vol
*volume_info
)
2771 if (tcon
->tidStatus
== CifsExiting
)
2773 if (strncmp(tcon
->treeName
, volume_info
->UNC
, MAX_TREE_SIZE
))
2775 if (tcon
->seal
!= volume_info
->seal
)
2777 if (tcon
->snapshot_time
!= volume_info
->snapshot_time
)
2782 static struct cifs_tcon
*
2783 cifs_find_tcon(struct cifs_ses
*ses
, struct smb_vol
*volume_info
)
2785 struct list_head
*tmp
;
2786 struct cifs_tcon
*tcon
;
2788 spin_lock(&cifs_tcp_ses_lock
);
2789 list_for_each(tmp
, &ses
->tcon_list
) {
2790 tcon
= list_entry(tmp
, struct cifs_tcon
, tcon_list
);
2791 if (!match_tcon(tcon
, volume_info
))
2794 spin_unlock(&cifs_tcp_ses_lock
);
2797 spin_unlock(&cifs_tcp_ses_lock
);
2802 cifs_put_tcon(struct cifs_tcon
*tcon
)
2805 struct cifs_ses
*ses
;
2808 * IPC tcon share the lifetime of their session and are
2809 * destroyed in the session put function
2811 if (tcon
== NULL
|| tcon
->ipc
)
2815 cifs_dbg(FYI
, "%s: tc_count=%d\n", __func__
, tcon
->tc_count
);
2816 spin_lock(&cifs_tcp_ses_lock
);
2817 if (--tcon
->tc_count
> 0) {
2818 spin_unlock(&cifs_tcp_ses_lock
);
2822 list_del_init(&tcon
->tcon_list
);
2823 spin_unlock(&cifs_tcp_ses_lock
);
2826 if (ses
->server
->ops
->tree_disconnect
)
2827 ses
->server
->ops
->tree_disconnect(xid
, tcon
);
2830 cifs_fscache_release_super_cookie(tcon
);
2832 cifs_put_smb_ses(ses
);
2835 static struct cifs_tcon
*
2836 cifs_get_tcon(struct cifs_ses
*ses
, struct smb_vol
*volume_info
)
2839 struct cifs_tcon
*tcon
;
2841 tcon
= cifs_find_tcon(ses
, volume_info
);
2843 cifs_dbg(FYI
, "Found match on UNC path\n");
2844 /* existing tcon already has a reference */
2845 cifs_put_smb_ses(ses
);
2849 if (!ses
->server
->ops
->tree_connect
) {
2854 tcon
= tconInfoAlloc();
2860 if (volume_info
->snapshot_time
) {
2861 if (ses
->server
->vals
->protocol_id
== 0) {
2863 "Use SMB2 or later for snapshot mount option\n");
2867 tcon
->snapshot_time
= volume_info
->snapshot_time
;
2871 if (volume_info
->password
) {
2872 tcon
->password
= kstrdup(volume_info
->password
, GFP_KERNEL
);
2873 if (!tcon
->password
) {
2880 * BB Do we need to wrap session_mutex around this TCon call and Unix
2881 * SetFS as we do on SessSetup and reconnect?
2884 rc
= ses
->server
->ops
->tree_connect(xid
, ses
, volume_info
->UNC
, tcon
,
2885 volume_info
->local_nls
);
2887 cifs_dbg(FYI
, "Tcon rc = %d\n", rc
);
2891 if (volume_info
->nodfs
) {
2892 tcon
->Flags
&= ~SMB_SHARE_IS_IN_DFS
;
2893 cifs_dbg(FYI
, "DFS disabled (%d)\n", tcon
->Flags
);
2895 tcon
->use_persistent
= false;
2896 /* check if SMB2 or later, CIFS does not support persistent handles */
2897 if (volume_info
->persistent
) {
2898 if (ses
->server
->vals
->protocol_id
== 0) {
2900 "SMB3 or later required for persistent handles\n");
2903 } else if (ses
->server
->capabilities
&
2904 SMB2_GLOBAL_CAP_PERSISTENT_HANDLES
)
2905 tcon
->use_persistent
= true;
2906 else /* persistent handles requested but not supported */ {
2908 "Persistent handles not supported on share\n");
2912 } else if ((tcon
->capabilities
& SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY
)
2913 && (ses
->server
->capabilities
& SMB2_GLOBAL_CAP_PERSISTENT_HANDLES
)
2914 && (volume_info
->nopersistent
== false)) {
2915 cifs_dbg(FYI
, "enabling persistent handles\n");
2916 tcon
->use_persistent
= true;
2917 } else if (volume_info
->resilient
) {
2918 if (ses
->server
->vals
->protocol_id
== 0) {
2920 "SMB2.1 or later required for resilient handles\n");
2924 tcon
->use_resilient
= true;
2927 if (volume_info
->seal
) {
2928 if (ses
->server
->vals
->protocol_id
== 0) {
2930 "SMB3 or later required for encryption\n");
2933 } else if (tcon
->ses
->server
->capabilities
&
2934 SMB2_GLOBAL_CAP_ENCRYPTION
)
2937 cifs_dbg(VFS
, "Encryption is not supported on share\n");
2944 * We can have only one retry value for a connection to a share so for
2945 * resources mounted more than once to the same server share the last
2946 * value passed in for the retry flag is used.
2948 tcon
->retry
= volume_info
->retry
;
2949 tcon
->nocase
= volume_info
->nocase
;
2950 tcon
->local_lease
= volume_info
->local_lease
;
2951 INIT_LIST_HEAD(&tcon
->pending_opens
);
2953 spin_lock(&cifs_tcp_ses_lock
);
2954 list_add(&tcon
->tcon_list
, &ses
->tcon_list
);
2955 spin_unlock(&cifs_tcp_ses_lock
);
2957 cifs_fscache_get_super_cookie(tcon
);
2967 cifs_put_tlink(struct tcon_link
*tlink
)
2969 if (!tlink
|| IS_ERR(tlink
))
2972 if (!atomic_dec_and_test(&tlink
->tl_count
) ||
2973 test_bit(TCON_LINK_IN_TREE
, &tlink
->tl_flags
)) {
2974 tlink
->tl_time
= jiffies
;
2978 if (!IS_ERR(tlink_tcon(tlink
)))
2979 cifs_put_tcon(tlink_tcon(tlink
));
2984 static inline struct tcon_link
*
2985 cifs_sb_master_tlink(struct cifs_sb_info
*cifs_sb
)
2987 return cifs_sb
->master_tlink
;
2991 compare_mount_options(struct super_block
*sb
, struct cifs_mnt_data
*mnt_data
)
2993 struct cifs_sb_info
*old
= CIFS_SB(sb
);
2994 struct cifs_sb_info
*new = mnt_data
->cifs_sb
;
2996 if ((sb
->s_flags
& CIFS_MS_MASK
) != (mnt_data
->flags
& CIFS_MS_MASK
))
2999 if ((old
->mnt_cifs_flags
& CIFS_MOUNT_MASK
) !=
3000 (new->mnt_cifs_flags
& CIFS_MOUNT_MASK
))
3004 * We want to share sb only if we don't specify an r/wsize or
3005 * specified r/wsize is greater than or equal to existing one.
3007 if (new->wsize
&& new->wsize
< old
->wsize
)
3010 if (new->rsize
&& new->rsize
< old
->rsize
)
3013 if (!uid_eq(old
->mnt_uid
, new->mnt_uid
) || !gid_eq(old
->mnt_gid
, new->mnt_gid
))
3016 if (old
->mnt_file_mode
!= new->mnt_file_mode
||
3017 old
->mnt_dir_mode
!= new->mnt_dir_mode
)
3020 if (strcmp(old
->local_nls
->charset
, new->local_nls
->charset
))
3023 if (old
->actimeo
!= new->actimeo
)
3030 match_prepath(struct super_block
*sb
, struct cifs_mnt_data
*mnt_data
)
3032 struct cifs_sb_info
*old
= CIFS_SB(sb
);
3033 struct cifs_sb_info
*new = mnt_data
->cifs_sb
;
3034 bool old_set
= old
->mnt_cifs_flags
& CIFS_MOUNT_USE_PREFIX_PATH
;
3035 bool new_set
= new->mnt_cifs_flags
& CIFS_MOUNT_USE_PREFIX_PATH
;
3037 if (old_set
&& new_set
&& !strcmp(new->prepath
, old
->prepath
))
3039 else if (!old_set
&& !new_set
)
3046 cifs_match_super(struct super_block
*sb
, void *data
)
3048 struct cifs_mnt_data
*mnt_data
= (struct cifs_mnt_data
*)data
;
3049 struct smb_vol
*volume_info
;
3050 struct cifs_sb_info
*cifs_sb
;
3051 struct TCP_Server_Info
*tcp_srv
;
3052 struct cifs_ses
*ses
;
3053 struct cifs_tcon
*tcon
;
3054 struct tcon_link
*tlink
;
3057 spin_lock(&cifs_tcp_ses_lock
);
3058 cifs_sb
= CIFS_SB(sb
);
3059 tlink
= cifs_get_tlink(cifs_sb_master_tlink(cifs_sb
));
3060 if (IS_ERR(tlink
)) {
3061 spin_unlock(&cifs_tcp_ses_lock
);
3064 tcon
= tlink_tcon(tlink
);
3066 tcp_srv
= ses
->server
;
3068 volume_info
= mnt_data
->vol
;
3070 if (!match_server(tcp_srv
, volume_info
) ||
3071 !match_session(ses
, volume_info
) ||
3072 !match_tcon(tcon
, volume_info
) ||
3073 !match_prepath(sb
, mnt_data
)) {
3078 rc
= compare_mount_options(sb
, mnt_data
);
3080 spin_unlock(&cifs_tcp_ses_lock
);
3081 cifs_put_tlink(tlink
);
3086 get_dfs_path(const unsigned int xid
, struct cifs_ses
*ses
, const char *old_path
,
3087 const struct nls_table
*nls_codepage
, unsigned int *num_referrals
,
3088 struct dfs_info3_param
**referrals
, int remap
)
3092 if (!ses
->server
->ops
->get_dfs_refer
)
3098 rc
= ses
->server
->ops
->get_dfs_refer(xid
, ses
, old_path
,
3099 referrals
, num_referrals
,
3100 nls_codepage
, remap
);
3104 #ifdef CONFIG_DEBUG_LOCK_ALLOC
3105 static struct lock_class_key cifs_key
[2];
3106 static struct lock_class_key cifs_slock_key
[2];
3109 cifs_reclassify_socket4(struct socket
*sock
)
3111 struct sock
*sk
= sock
->sk
;
3112 BUG_ON(!sock_allow_reclassification(sk
));
3113 sock_lock_init_class_and_name(sk
, "slock-AF_INET-CIFS",
3114 &cifs_slock_key
[0], "sk_lock-AF_INET-CIFS", &cifs_key
[0]);
3118 cifs_reclassify_socket6(struct socket
*sock
)
3120 struct sock
*sk
= sock
->sk
;
3121 BUG_ON(!sock_allow_reclassification(sk
));
3122 sock_lock_init_class_and_name(sk
, "slock-AF_INET6-CIFS",
3123 &cifs_slock_key
[1], "sk_lock-AF_INET6-CIFS", &cifs_key
[1]);
3127 cifs_reclassify_socket4(struct socket
*sock
)
3132 cifs_reclassify_socket6(struct socket
*sock
)
3137 /* See RFC1001 section 14 on representation of Netbios names */
3138 static void rfc1002mangle(char *target
, char *source
, unsigned int length
)
3142 for (i
= 0, j
= 0; i
< (length
); i
++) {
3143 /* mask a nibble at a time and encode */
3144 target
[j
] = 'A' + (0x0F & (source
[i
] >> 4));
3145 target
[j
+1] = 'A' + (0x0F & source
[i
]);
3152 bind_socket(struct TCP_Server_Info
*server
)
3155 if (server
->srcaddr
.ss_family
!= AF_UNSPEC
) {
3156 /* Bind to the specified local IP address */
3157 struct socket
*socket
= server
->ssocket
;
3158 rc
= socket
->ops
->bind(socket
,
3159 (struct sockaddr
*) &server
->srcaddr
,
3160 sizeof(server
->srcaddr
));
3162 struct sockaddr_in
*saddr4
;
3163 struct sockaddr_in6
*saddr6
;
3164 saddr4
= (struct sockaddr_in
*)&server
->srcaddr
;
3165 saddr6
= (struct sockaddr_in6
*)&server
->srcaddr
;
3166 if (saddr6
->sin6_family
== AF_INET6
)
3167 cifs_dbg(VFS
, "Failed to bind to: %pI6c, error: %d\n",
3168 &saddr6
->sin6_addr
, rc
);
3170 cifs_dbg(VFS
, "Failed to bind to: %pI4, error: %d\n",
3171 &saddr4
->sin_addr
.s_addr
, rc
);
3178 ip_rfc1001_connect(struct TCP_Server_Info
*server
)
3182 * some servers require RFC1001 sessinit before sending
3183 * negprot - BB check reconnection in case where second
3184 * sessinit is sent but no second negprot
3186 struct rfc1002_session_packet
*ses_init_buf
;
3187 struct smb_hdr
*smb_buf
;
3188 ses_init_buf
= kzalloc(sizeof(struct rfc1002_session_packet
),
3191 ses_init_buf
->trailer
.session_req
.called_len
= 32;
3193 if (server
->server_RFC1001_name
[0] != 0)
3194 rfc1002mangle(ses_init_buf
->trailer
.
3195 session_req
.called_name
,
3196 server
->server_RFC1001_name
,
3197 RFC1001_NAME_LEN_WITH_NULL
);
3199 rfc1002mangle(ses_init_buf
->trailer
.
3200 session_req
.called_name
,
3201 DEFAULT_CIFS_CALLED_NAME
,
3202 RFC1001_NAME_LEN_WITH_NULL
);
3204 ses_init_buf
->trailer
.session_req
.calling_len
= 32;
3207 * calling name ends in null (byte 16) from old smb
3210 if (server
->workstation_RFC1001_name
[0] != 0)
3211 rfc1002mangle(ses_init_buf
->trailer
.
3212 session_req
.calling_name
,
3213 server
->workstation_RFC1001_name
,
3214 RFC1001_NAME_LEN_WITH_NULL
);
3216 rfc1002mangle(ses_init_buf
->trailer
.
3217 session_req
.calling_name
,
3219 RFC1001_NAME_LEN_WITH_NULL
);
3221 ses_init_buf
->trailer
.session_req
.scope1
= 0;
3222 ses_init_buf
->trailer
.session_req
.scope2
= 0;
3223 smb_buf
= (struct smb_hdr
*)ses_init_buf
;
3225 /* sizeof RFC1002_SESSION_REQUEST with no scope */
3226 smb_buf
->smb_buf_length
= cpu_to_be32(0x81000044);
3227 rc
= smb_send(server
, smb_buf
, 0x44);
3228 kfree(ses_init_buf
);
3230 * RFC1001 layer in at least one server
3231 * requires very short break before negprot
3232 * presumably because not expecting negprot
3233 * to follow so fast. This is a simple
3234 * solution that works without
3235 * complicating the code and causes no
3236 * significant slowing down on mount
3239 usleep_range(1000, 2000);
3242 * else the negprot may still work without this
3243 * even though malloc failed
3250 generic_ip_connect(struct TCP_Server_Info
*server
)
3255 struct socket
*socket
= server
->ssocket
;
3256 struct sockaddr
*saddr
;
3258 saddr
= (struct sockaddr
*) &server
->dstaddr
;
3260 if (server
->dstaddr
.ss_family
== AF_INET6
) {
3261 sport
= ((struct sockaddr_in6
*) saddr
)->sin6_port
;
3262 slen
= sizeof(struct sockaddr_in6
);
3265 sport
= ((struct sockaddr_in
*) saddr
)->sin_port
;
3266 slen
= sizeof(struct sockaddr_in
);
3270 if (socket
== NULL
) {
3271 rc
= __sock_create(cifs_net_ns(server
), sfamily
, SOCK_STREAM
,
3272 IPPROTO_TCP
, &socket
, 1);
3274 cifs_dbg(VFS
, "Error %d creating socket\n", rc
);
3275 server
->ssocket
= NULL
;
3279 /* BB other socket options to set KEEPALIVE, NODELAY? */
3280 cifs_dbg(FYI
, "Socket created\n");
3281 server
->ssocket
= socket
;
3282 socket
->sk
->sk_allocation
= GFP_NOFS
;
3283 if (sfamily
== AF_INET6
)
3284 cifs_reclassify_socket6(socket
);
3286 cifs_reclassify_socket4(socket
);
3289 rc
= bind_socket(server
);
3294 * Eventually check for other socket options to change from
3295 * the default. sock_setsockopt not used because it expects
3298 socket
->sk
->sk_rcvtimeo
= 7 * HZ
;
3299 socket
->sk
->sk_sndtimeo
= 5 * HZ
;
3301 /* make the bufsizes depend on wsize/rsize and max requests */
3302 if (server
->noautotune
) {
3303 if (socket
->sk
->sk_sndbuf
< (200 * 1024))
3304 socket
->sk
->sk_sndbuf
= 200 * 1024;
3305 if (socket
->sk
->sk_rcvbuf
< (140 * 1024))
3306 socket
->sk
->sk_rcvbuf
= 140 * 1024;
3309 if (server
->tcp_nodelay
) {
3311 rc
= kernel_setsockopt(socket
, SOL_TCP
, TCP_NODELAY
,
3312 (char *)&val
, sizeof(val
));
3314 cifs_dbg(FYI
, "set TCP_NODELAY socket option error %d\n",
3318 cifs_dbg(FYI
, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n",
3319 socket
->sk
->sk_sndbuf
,
3320 socket
->sk
->sk_rcvbuf
, socket
->sk
->sk_rcvtimeo
);
3322 rc
= socket
->ops
->connect(socket
, saddr
, slen
, 0);
3324 cifs_dbg(FYI
, "Error %d connecting to server\n", rc
);
3325 sock_release(socket
);
3326 server
->ssocket
= NULL
;
3330 if (sport
== htons(RFC1001_PORT
))
3331 rc
= ip_rfc1001_connect(server
);
3337 ip_connect(struct TCP_Server_Info
*server
)
3340 struct sockaddr_in6
*addr6
= (struct sockaddr_in6
*)&server
->dstaddr
;
3341 struct sockaddr_in
*addr
= (struct sockaddr_in
*)&server
->dstaddr
;
3343 if (server
->dstaddr
.ss_family
== AF_INET6
)
3344 sport
= &addr6
->sin6_port
;
3346 sport
= &addr
->sin_port
;
3351 /* try with 445 port at first */
3352 *sport
= htons(CIFS_PORT
);
3354 rc
= generic_ip_connect(server
);
3358 /* if it failed, try with 139 port */
3359 *sport
= htons(RFC1001_PORT
);
3362 return generic_ip_connect(server
);
3365 void reset_cifs_unix_caps(unsigned int xid
, struct cifs_tcon
*tcon
,
3366 struct cifs_sb_info
*cifs_sb
, struct smb_vol
*vol_info
)
3368 /* if we are reconnecting then should we check to see if
3369 * any requested capabilities changed locally e.g. via
3370 * remount but we can not do much about it here
3371 * if they have (even if we could detect it by the following)
3372 * Perhaps we could add a backpointer to array of sb from tcon
3373 * or if we change to make all sb to same share the same
3374 * sb as NFS - then we only have one backpointer to sb.
3375 * What if we wanted to mount the server share twice once with
3376 * and once without posixacls or posix paths? */
3377 __u64 saved_cap
= le64_to_cpu(tcon
->fsUnixInfo
.Capability
);
3379 if (vol_info
&& vol_info
->no_linux_ext
) {
3380 tcon
->fsUnixInfo
.Capability
= 0;
3381 tcon
->unix_ext
= 0; /* Unix Extensions disabled */
3382 cifs_dbg(FYI
, "Linux protocol extensions disabled\n");
3384 } else if (vol_info
)
3385 tcon
->unix_ext
= 1; /* Unix Extensions supported */
3387 if (tcon
->unix_ext
== 0) {
3388 cifs_dbg(FYI
, "Unix extensions disabled so not set on reconnect\n");
3392 if (!CIFSSMBQFSUnixInfo(xid
, tcon
)) {
3393 __u64 cap
= le64_to_cpu(tcon
->fsUnixInfo
.Capability
);
3394 cifs_dbg(FYI
, "unix caps which server supports %lld\n", cap
);
3395 /* check for reconnect case in which we do not
3396 want to change the mount behavior if we can avoid it */
3397 if (vol_info
== NULL
) {
3398 /* turn off POSIX ACL and PATHNAMES if not set
3399 originally at mount time */
3400 if ((saved_cap
& CIFS_UNIX_POSIX_ACL_CAP
) == 0)
3401 cap
&= ~CIFS_UNIX_POSIX_ACL_CAP
;
3402 if ((saved_cap
& CIFS_UNIX_POSIX_PATHNAMES_CAP
) == 0) {
3403 if (cap
& CIFS_UNIX_POSIX_PATHNAMES_CAP
)
3404 cifs_dbg(VFS
, "POSIXPATH support change\n");
3405 cap
&= ~CIFS_UNIX_POSIX_PATHNAMES_CAP
;
3406 } else if ((cap
& CIFS_UNIX_POSIX_PATHNAMES_CAP
) == 0) {
3407 cifs_dbg(VFS
, "possible reconnect error\n");
3408 cifs_dbg(VFS
, "server disabled POSIX path support\n");
3412 if (cap
& CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP
)
3413 cifs_dbg(VFS
, "per-share encryption not supported yet\n");
3415 cap
&= CIFS_UNIX_CAP_MASK
;
3416 if (vol_info
&& vol_info
->no_psx_acl
)
3417 cap
&= ~CIFS_UNIX_POSIX_ACL_CAP
;
3418 else if (CIFS_UNIX_POSIX_ACL_CAP
& cap
) {
3419 cifs_dbg(FYI
, "negotiated posix acl support\n");
3421 cifs_sb
->mnt_cifs_flags
|=
3422 CIFS_MOUNT_POSIXACL
;
3425 if (vol_info
&& vol_info
->posix_paths
== 0)
3426 cap
&= ~CIFS_UNIX_POSIX_PATHNAMES_CAP
;
3427 else if (cap
& CIFS_UNIX_POSIX_PATHNAMES_CAP
) {
3428 cifs_dbg(FYI
, "negotiate posix pathnames\n");
3430 cifs_sb
->mnt_cifs_flags
|=
3431 CIFS_MOUNT_POSIX_PATHS
;
3434 cifs_dbg(FYI
, "Negotiate caps 0x%x\n", (int)cap
);
3435 #ifdef CONFIG_CIFS_DEBUG2
3436 if (cap
& CIFS_UNIX_FCNTL_CAP
)
3437 cifs_dbg(FYI
, "FCNTL cap\n");
3438 if (cap
& CIFS_UNIX_EXTATTR_CAP
)
3439 cifs_dbg(FYI
, "EXTATTR cap\n");
3440 if (cap
& CIFS_UNIX_POSIX_PATHNAMES_CAP
)
3441 cifs_dbg(FYI
, "POSIX path cap\n");
3442 if (cap
& CIFS_UNIX_XATTR_CAP
)
3443 cifs_dbg(FYI
, "XATTR cap\n");
3444 if (cap
& CIFS_UNIX_POSIX_ACL_CAP
)
3445 cifs_dbg(FYI
, "POSIX ACL cap\n");
3446 if (cap
& CIFS_UNIX_LARGE_READ_CAP
)
3447 cifs_dbg(FYI
, "very large read cap\n");
3448 if (cap
& CIFS_UNIX_LARGE_WRITE_CAP
)
3449 cifs_dbg(FYI
, "very large write cap\n");
3450 if (cap
& CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP
)
3451 cifs_dbg(FYI
, "transport encryption cap\n");
3452 if (cap
& CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP
)
3453 cifs_dbg(FYI
, "mandatory transport encryption cap\n");
3454 #endif /* CIFS_DEBUG2 */
3455 if (CIFSSMBSetFSUnixInfo(xid
, tcon
, cap
)) {
3456 if (vol_info
== NULL
) {
3457 cifs_dbg(FYI
, "resetting capabilities failed\n");
3459 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");
3465 int cifs_setup_cifs_sb(struct smb_vol
*pvolume_info
,
3466 struct cifs_sb_info
*cifs_sb
)
3468 INIT_DELAYED_WORK(&cifs_sb
->prune_tlinks
, cifs_prune_tlinks
);
3470 spin_lock_init(&cifs_sb
->tlink_tree_lock
);
3471 cifs_sb
->tlink_tree
= RB_ROOT
;
3474 * Temporarily set r/wsize for matching superblock. If we end up using
3475 * new sb then client will later negotiate it downward if needed.
3477 cifs_sb
->rsize
= pvolume_info
->rsize
;
3478 cifs_sb
->wsize
= pvolume_info
->wsize
;
3480 cifs_sb
->mnt_uid
= pvolume_info
->linux_uid
;
3481 cifs_sb
->mnt_gid
= pvolume_info
->linux_gid
;
3482 cifs_sb
->mnt_file_mode
= pvolume_info
->file_mode
;
3483 cifs_sb
->mnt_dir_mode
= pvolume_info
->dir_mode
;
3484 cifs_dbg(FYI
, "file mode: 0x%hx dir mode: 0x%hx\n",
3485 cifs_sb
->mnt_file_mode
, cifs_sb
->mnt_dir_mode
);
3487 cifs_sb
->actimeo
= pvolume_info
->actimeo
;
3488 cifs_sb
->local_nls
= pvolume_info
->local_nls
;
3490 if (pvolume_info
->noperm
)
3491 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NO_PERM
;
3492 if (pvolume_info
->setuids
)
3493 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_SET_UID
;
3494 if (pvolume_info
->setuidfromacl
)
3495 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_UID_FROM_ACL
;
3496 if (pvolume_info
->server_ino
)
3497 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_SERVER_INUM
;
3498 if (pvolume_info
->remap
)
3499 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_MAP_SFM_CHR
;
3500 if (pvolume_info
->sfu_remap
)
3501 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_MAP_SPECIAL_CHR
;
3502 if (pvolume_info
->no_xattr
)
3503 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NO_XATTR
;
3504 if (pvolume_info
->sfu_emul
)
3505 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_UNX_EMUL
;
3506 if (pvolume_info
->nobrl
)
3507 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NO_BRL
;
3508 if (pvolume_info
->nostrictsync
)
3509 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NOSSYNC
;
3510 if (pvolume_info
->mand_lock
)
3511 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NOPOSIXBRL
;
3512 if (pvolume_info
->rwpidforward
)
3513 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_RWPIDFORWARD
;
3514 if (pvolume_info
->cifs_acl
)
3515 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_CIFS_ACL
;
3516 if (pvolume_info
->backupuid_specified
) {
3517 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_CIFS_BACKUPUID
;
3518 cifs_sb
->mnt_backupuid
= pvolume_info
->backupuid
;
3520 if (pvolume_info
->backupgid_specified
) {
3521 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_CIFS_BACKUPGID
;
3522 cifs_sb
->mnt_backupgid
= pvolume_info
->backupgid
;
3524 if (pvolume_info
->override_uid
)
3525 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_OVERR_UID
;
3526 if (pvolume_info
->override_gid
)
3527 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_OVERR_GID
;
3528 if (pvolume_info
->dynperm
)
3529 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_DYNPERM
;
3530 if (pvolume_info
->fsc
)
3531 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_FSCACHE
;
3532 if (pvolume_info
->multiuser
)
3533 cifs_sb
->mnt_cifs_flags
|= (CIFS_MOUNT_MULTIUSER
|
3534 CIFS_MOUNT_NO_PERM
);
3535 if (pvolume_info
->strict_io
)
3536 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_STRICT_IO
;
3537 if (pvolume_info
->direct_io
) {
3538 cifs_dbg(FYI
, "mounting share using direct i/o\n");
3539 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_DIRECT_IO
;
3541 if (pvolume_info
->mfsymlinks
) {
3542 if (pvolume_info
->sfu_emul
) {
3544 * Our SFU ("Services for Unix" emulation does not allow
3545 * creating symlinks but does allow reading existing SFU
3546 * symlinks (it does allow both creating and reading SFU
3547 * style mknod and FIFOs though). When "mfsymlinks" and
3548 * "sfu" are both enabled at the same time, it allows
3549 * reading both types of symlinks, but will only create
3550 * them with mfsymlinks format. This allows better
3551 * Apple compatibility (probably better for Samba too)
3552 * while still recognizing old Windows style symlinks.
3554 cifs_dbg(VFS
, "mount options mfsymlinks and sfu both enabled\n");
3556 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_MF_SYMLINKS
;
3559 if ((pvolume_info
->cifs_acl
) && (pvolume_info
->dynperm
))
3560 cifs_dbg(VFS
, "mount option dynperm ignored if cifsacl mount option supported\n");
3562 if (pvolume_info
->prepath
) {
3563 cifs_sb
->prepath
= kstrdup(pvolume_info
->prepath
, GFP_KERNEL
);
3564 if (cifs_sb
->prepath
== NULL
)
3572 cleanup_volume_info_contents(struct smb_vol
*volume_info
)
3574 kfree(volume_info
->username
);
3575 kzfree(volume_info
->password
);
3576 kfree(volume_info
->UNC
);
3577 kfree(volume_info
->domainname
);
3578 kfree(volume_info
->iocharset
);
3579 kfree(volume_info
->prepath
);
3583 cifs_cleanup_volume_info(struct smb_vol
*volume_info
)
3587 cleanup_volume_info_contents(volume_info
);
3592 #ifdef CONFIG_CIFS_DFS_UPCALL
3594 * cifs_build_path_to_root returns full path to root when we do not have an
3595 * exiting connection (tcon)
3598 build_unc_path_to_root(const struct smb_vol
*vol
,
3599 const struct cifs_sb_info
*cifs_sb
)
3601 char *full_path
, *pos
;
3602 unsigned int pplen
= vol
->prepath
? strlen(vol
->prepath
) + 1 : 0;
3603 unsigned int unc_len
= strnlen(vol
->UNC
, MAX_TREE_SIZE
+ 1);
3605 full_path
= kmalloc(unc_len
+ pplen
+ 1, GFP_KERNEL
);
3606 if (full_path
== NULL
)
3607 return ERR_PTR(-ENOMEM
);
3609 strncpy(full_path
, vol
->UNC
, unc_len
);
3610 pos
= full_path
+ unc_len
;
3613 *pos
= CIFS_DIR_SEP(cifs_sb
);
3614 strncpy(pos
+ 1, vol
->prepath
, pplen
);
3618 *pos
= '\0'; /* add trailing null */
3619 convert_delimiter(full_path
, CIFS_DIR_SEP(cifs_sb
));
3620 cifs_dbg(FYI
, "%s: full_path=%s\n", __func__
, full_path
);
3625 * Perform a dfs referral query for a share and (optionally) prefix
3627 * If a referral is found, cifs_sb->mountdata will be (re-)allocated
3628 * to a string containing updated options for the submount. Otherwise it
3629 * will be left untouched.
3631 * Returns the rc from get_dfs_path to the caller, which can be used to
3632 * determine whether there were referrals.
3635 expand_dfs_referral(const unsigned int xid
, struct cifs_ses
*ses
,
3636 struct smb_vol
*volume_info
, struct cifs_sb_info
*cifs_sb
,
3640 unsigned int num_referrals
= 0;
3641 struct dfs_info3_param
*referrals
= NULL
;
3642 char *full_path
= NULL
, *ref_path
= NULL
, *mdata
= NULL
;
3644 full_path
= build_unc_path_to_root(volume_info
, cifs_sb
);
3645 if (IS_ERR(full_path
))
3646 return PTR_ERR(full_path
);
3648 /* For DFS paths, skip the first '\' of the UNC */
3649 ref_path
= check_prefix
? full_path
+ 1 : volume_info
->UNC
+ 1;
3651 rc
= get_dfs_path(xid
, ses
, ref_path
, cifs_sb
->local_nls
,
3652 &num_referrals
, &referrals
, cifs_remap(cifs_sb
));
3654 if (!rc
&& num_referrals
> 0) {
3655 char *fake_devname
= NULL
;
3657 mdata
= cifs_compose_mount_options(cifs_sb
->mountdata
,
3658 full_path
+ 1, referrals
,
3661 free_dfs_info_array(referrals
, num_referrals
);
3663 if (IS_ERR(mdata
)) {
3664 rc
= PTR_ERR(mdata
);
3667 cleanup_volume_info_contents(volume_info
);
3668 rc
= cifs_setup_volume_info(volume_info
, mdata
,
3671 kfree(fake_devname
);
3672 kfree(cifs_sb
->mountdata
);
3673 cifs_sb
->mountdata
= mdata
;
3681 cifs_setup_volume_info(struct smb_vol
*volume_info
, char *mount_data
,
3682 const char *devname
)
3686 if (cifs_parse_mount_options(mount_data
, devname
, volume_info
))
3689 if (volume_info
->nullauth
) {
3690 cifs_dbg(FYI
, "Anonymous login\n");
3691 kfree(volume_info
->username
);
3692 volume_info
->username
= NULL
;
3693 } else if (volume_info
->username
) {
3694 /* BB fixme parse for domain name here */
3695 cifs_dbg(FYI
, "Username: %s\n", volume_info
->username
);
3697 cifs_dbg(VFS
, "No username specified\n");
3698 /* In userspace mount helper we can get user name from alternate
3699 locations such as env variables and files on disk */
3703 /* this is needed for ASCII cp to Unicode converts */
3704 if (volume_info
->iocharset
== NULL
) {
3705 /* load_nls_default cannot return null */
3706 volume_info
->local_nls
= load_nls_default();
3708 volume_info
->local_nls
= load_nls(volume_info
->iocharset
);
3709 if (volume_info
->local_nls
== NULL
) {
3710 cifs_dbg(VFS
, "CIFS mount error: iocharset %s not found\n",
3711 volume_info
->iocharset
);
3720 cifs_get_volume_info(char *mount_data
, const char *devname
)
3723 struct smb_vol
*volume_info
;
3725 volume_info
= kmalloc(sizeof(struct smb_vol
), GFP_KERNEL
);
3727 return ERR_PTR(-ENOMEM
);
3729 rc
= cifs_setup_volume_info(volume_info
, mount_data
, devname
);
3731 cifs_cleanup_volume_info(volume_info
);
3732 volume_info
= ERR_PTR(rc
);
3739 cifs_are_all_path_components_accessible(struct TCP_Server_Info
*server
,
3741 struct cifs_tcon
*tcon
,
3742 struct cifs_sb_info
*cifs_sb
,
3749 sep
= CIFS_DIR_SEP(cifs_sb
);
3752 rc
= server
->ops
->is_path_accessible(xid
, tcon
, cifs_sb
, "");
3754 /* skip separators */
3759 /* next separator */
3760 while (*s
&& *s
!= sep
)
3764 * temporarily null-terminate the path at the end of
3765 * the current component
3769 rc
= server
->ops
->is_path_accessible(xid
, tcon
, cifs_sb
,
3777 cifs_mount(struct cifs_sb_info
*cifs_sb
, struct smb_vol
*volume_info
)
3781 struct cifs_ses
*ses
;
3782 struct cifs_tcon
*tcon
;
3783 struct TCP_Server_Info
*server
;
3785 struct tcon_link
*tlink
;
3786 #ifdef CONFIG_CIFS_DFS_UPCALL
3787 int referral_walks_count
= 0;
3790 #ifdef CONFIG_CIFS_DFS_UPCALL
3792 /* cleanup activities if we're chasing a referral */
3793 if (referral_walks_count
) {
3795 cifs_put_tcon(tcon
);
3797 cifs_put_smb_ses(ses
);
3799 cifs_sb
->mnt_cifs_flags
&= ~CIFS_MOUNT_POSIX_PATHS
;
3813 /* get a reference to a tcp session */
3814 server
= cifs_get_tcp_session(volume_info
);
3815 if (IS_ERR(server
)) {
3816 rc
= PTR_ERR(server
);
3819 if ((volume_info
->max_credits
< 20) ||
3820 (volume_info
->max_credits
> 60000))
3821 server
->max_credits
= SMB2_MAX_CREDITS_AVAILABLE
;
3823 server
->max_credits
= volume_info
->max_credits
;
3824 /* get a reference to a SMB session */
3825 ses
= cifs_get_smb_ses(server
, volume_info
);
3829 goto mount_fail_check
;
3832 if ((volume_info
->persistent
== true) && ((ses
->server
->capabilities
&
3833 SMB2_GLOBAL_CAP_PERSISTENT_HANDLES
) == 0)) {
3834 cifs_dbg(VFS
, "persistent handles not supported by server\n");
3836 goto mount_fail_check
;
3839 /* search for existing tcon to this server share */
3840 tcon
= cifs_get_tcon(ses
, volume_info
);
3845 goto mount_fail_check
;
3847 goto remote_path_check
;
3850 /* tell server which Unix caps we support */
3851 if (cap_unix(tcon
->ses
)) {
3852 /* reset of caps checks mount to see if unix extensions
3853 disabled for just this mount */
3854 reset_cifs_unix_caps(xid
, tcon
, cifs_sb
, volume_info
);
3855 if ((tcon
->ses
->server
->tcpStatus
== CifsNeedReconnect
) &&
3856 (le64_to_cpu(tcon
->fsUnixInfo
.Capability
) &
3857 CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP
)) {
3859 goto mount_fail_check
;
3862 tcon
->unix_ext
= 0; /* server does not support them */
3864 /* do not care if a following call succeed - informational */
3865 if (!tcon
->pipe
&& server
->ops
->qfs_tcon
)
3866 server
->ops
->qfs_tcon(xid
, tcon
);
3868 cifs_sb
->wsize
= server
->ops
->negotiate_wsize(tcon
, volume_info
);
3869 cifs_sb
->rsize
= server
->ops
->negotiate_rsize(tcon
, volume_info
);
3872 #ifdef CONFIG_CIFS_DFS_UPCALL
3874 * Perform an unconditional check for whether there are DFS
3875 * referrals for this path without prefix, to provide support
3876 * for DFS referrals from w2k8 servers which don't seem to respond
3877 * with PATH_NOT_COVERED to requests that include the prefix.
3878 * Chase the referral if found, otherwise continue normally.
3880 if (referral_walks_count
== 0) {
3881 int refrc
= expand_dfs_referral(xid
, ses
, volume_info
, cifs_sb
,
3884 referral_walks_count
++;
3885 goto try_mount_again
;
3890 /* check if a whole path is not remote */
3892 if (!server
->ops
->is_path_accessible
) {
3894 goto mount_fail_check
;
3897 * cifs_build_path_to_root works only when we have a valid tcon
3899 full_path
= cifs_build_path_to_root(volume_info
, cifs_sb
, tcon
,
3900 tcon
->Flags
& SMB_SHARE_IS_IN_DFS
);
3901 if (full_path
== NULL
) {
3903 goto mount_fail_check
;
3905 rc
= server
->ops
->is_path_accessible(xid
, tcon
, cifs_sb
,
3907 if (rc
!= 0 && rc
!= -EREMOTE
) {
3909 goto mount_fail_check
;
3912 if (rc
!= -EREMOTE
) {
3913 rc
= cifs_are_all_path_components_accessible(server
,
3917 cifs_dbg(VFS
, "cannot query dirs between root and final path, "
3918 "enabling CIFS_MOUNT_USE_PREFIX_PATH\n");
3919 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_USE_PREFIX_PATH
;
3926 /* get referral if needed */
3927 if (rc
== -EREMOTE
) {
3928 #ifdef CONFIG_CIFS_DFS_UPCALL
3929 if (referral_walks_count
> MAX_NESTED_LINKS
) {
3931 * BB: when we implement proper loop detection,
3932 * we will remove this check. But now we need it
3933 * to prevent an indefinite loop if 'DFS tree' is
3934 * misconfigured (i.e. has loops).
3937 goto mount_fail_check
;
3940 rc
= expand_dfs_referral(xid
, ses
, volume_info
, cifs_sb
, true);
3943 referral_walks_count
++;
3944 goto try_mount_again
;
3946 goto mount_fail_check
;
3947 #else /* No DFS support, return error on mount */
3953 goto mount_fail_check
;
3955 /* now, hang the tcon off of the superblock */
3956 tlink
= kzalloc(sizeof *tlink
, GFP_KERNEL
);
3957 if (tlink
== NULL
) {
3959 goto mount_fail_check
;
3962 tlink
->tl_uid
= ses
->linux_uid
;
3963 tlink
->tl_tcon
= tcon
;
3964 tlink
->tl_time
= jiffies
;
3965 set_bit(TCON_LINK_MASTER
, &tlink
->tl_flags
);
3966 set_bit(TCON_LINK_IN_TREE
, &tlink
->tl_flags
);
3968 cifs_sb
->master_tlink
= tlink
;
3969 spin_lock(&cifs_sb
->tlink_tree_lock
);
3970 tlink_rb_insert(&cifs_sb
->tlink_tree
, tlink
);
3971 spin_unlock(&cifs_sb
->tlink_tree_lock
);
3973 queue_delayed_work(cifsiod_wq
, &cifs_sb
->prune_tlinks
,
3977 /* on error free sesinfo and tcon struct if needed */
3979 /* If find_unc succeeded then rc == 0 so we can not end */
3980 /* up accidentally freeing someone elses tcon struct */
3982 cifs_put_tcon(tcon
);
3984 cifs_put_smb_ses(ses
);
3986 cifs_put_tcp_session(server
, 0);
3995 * Issue a TREE_CONNECT request.
3998 CIFSTCon(const unsigned int xid
, struct cifs_ses
*ses
,
3999 const char *tree
, struct cifs_tcon
*tcon
,
4000 const struct nls_table
*nls_codepage
)
4002 struct smb_hdr
*smb_buffer
;
4003 struct smb_hdr
*smb_buffer_response
;
4006 unsigned char *bcc_ptr
;
4009 __u16 bytes_left
, count
;
4014 smb_buffer
= cifs_buf_get();
4015 if (smb_buffer
== NULL
)
4018 smb_buffer_response
= smb_buffer
;
4020 header_assemble(smb_buffer
, SMB_COM_TREE_CONNECT_ANDX
,
4021 NULL
/*no tid */ , 4 /*wct */ );
4023 smb_buffer
->Mid
= get_next_mid(ses
->server
);
4024 smb_buffer
->Uid
= ses
->Suid
;
4025 pSMB
= (TCONX_REQ
*) smb_buffer
;
4026 pSMBr
= (TCONX_RSP
*) smb_buffer_response
;
4028 pSMB
->AndXCommand
= 0xFF;
4029 pSMB
->Flags
= cpu_to_le16(TCON_EXTENDED_SECINFO
);
4030 bcc_ptr
= &pSMB
->Password
[0];
4031 if (tcon
->pipe
|| (ses
->server
->sec_mode
& SECMODE_USER
)) {
4032 pSMB
->PasswordLength
= cpu_to_le16(1); /* minimum */
4033 *bcc_ptr
= 0; /* password is null byte */
4034 bcc_ptr
++; /* skip password */
4035 /* already aligned so no need to do it below */
4037 pSMB
->PasswordLength
= cpu_to_le16(CIFS_AUTH_RESP_SIZE
);
4038 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
4039 specified as required (when that support is added to
4040 the vfs in the future) as only NTLM or the much
4041 weaker LANMAN (which we do not send by default) is accepted
4042 by Samba (not sure whether other servers allow
4043 NTLMv2 password here) */
4044 #ifdef CONFIG_CIFS_WEAK_PW_HASH
4045 if ((global_secflags
& CIFSSEC_MAY_LANMAN
) &&
4046 (ses
->sectype
== LANMAN
))
4047 calc_lanman_hash(tcon
->password
, ses
->server
->cryptkey
,
4048 ses
->server
->sec_mode
&
4049 SECMODE_PW_ENCRYPT
? true : false,
4052 #endif /* CIFS_WEAK_PW_HASH */
4053 rc
= SMBNTencrypt(tcon
->password
, ses
->server
->cryptkey
,
4054 bcc_ptr
, nls_codepage
);
4056 cifs_dbg(FYI
, "%s Can't generate NTLM rsp. Error: %d\n",
4058 cifs_buf_release(smb_buffer
);
4062 bcc_ptr
+= CIFS_AUTH_RESP_SIZE
;
4063 if (ses
->capabilities
& CAP_UNICODE
) {
4064 /* must align unicode strings */
4065 *bcc_ptr
= 0; /* null byte password */
4070 if (ses
->server
->sign
)
4071 smb_buffer
->Flags2
|= SMBFLG2_SECURITY_SIGNATURE
;
4073 if (ses
->capabilities
& CAP_STATUS32
) {
4074 smb_buffer
->Flags2
|= SMBFLG2_ERR_STATUS
;
4076 if (ses
->capabilities
& CAP_DFS
) {
4077 smb_buffer
->Flags2
|= SMBFLG2_DFS
;
4079 if (ses
->capabilities
& CAP_UNICODE
) {
4080 smb_buffer
->Flags2
|= SMBFLG2_UNICODE
;
4082 cifs_strtoUTF16((__le16
*) bcc_ptr
, tree
,
4083 6 /* max utf8 char length in bytes */ *
4084 (/* server len*/ + 256 /* share len */), nls_codepage
);
4085 bcc_ptr
+= 2 * length
; /* convert num 16 bit words to bytes */
4086 bcc_ptr
+= 2; /* skip trailing null */
4087 } else { /* ASCII */
4088 strcpy(bcc_ptr
, tree
);
4089 bcc_ptr
+= strlen(tree
) + 1;
4091 strcpy(bcc_ptr
, "?????");
4092 bcc_ptr
+= strlen("?????");
4094 count
= bcc_ptr
- &pSMB
->Password
[0];
4095 pSMB
->hdr
.smb_buf_length
= cpu_to_be32(be32_to_cpu(
4096 pSMB
->hdr
.smb_buf_length
) + count
);
4097 pSMB
->ByteCount
= cpu_to_le16(count
);
4099 rc
= SendReceive(xid
, ses
, smb_buffer
, smb_buffer_response
, &length
,
4102 /* above now done in SendReceive */
4106 tcon
->tidStatus
= CifsGood
;
4107 tcon
->need_reconnect
= false;
4108 tcon
->tid
= smb_buffer_response
->Tid
;
4109 bcc_ptr
= pByteArea(smb_buffer_response
);
4110 bytes_left
= get_bcc(smb_buffer_response
);
4111 length
= strnlen(bcc_ptr
, bytes_left
- 2);
4112 if (smb_buffer
->Flags2
& SMBFLG2_UNICODE
)
4118 /* skip service field (NB: this field is always ASCII) */
4120 if ((bcc_ptr
[0] == 'I') && (bcc_ptr
[1] == 'P') &&
4121 (bcc_ptr
[2] == 'C')) {
4122 cifs_dbg(FYI
, "IPC connection\n");
4126 } else if (length
== 2) {
4127 if ((bcc_ptr
[0] == 'A') && (bcc_ptr
[1] == ':')) {
4128 /* the most common case */
4129 cifs_dbg(FYI
, "disk share connection\n");
4132 bcc_ptr
+= length
+ 1;
4133 bytes_left
-= (length
+ 1);
4134 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
4136 /* mostly informational -- no need to fail on error here */
4137 kfree(tcon
->nativeFileSystem
);
4138 tcon
->nativeFileSystem
= cifs_strndup_from_utf16(bcc_ptr
,
4139 bytes_left
, is_unicode
,
4142 cifs_dbg(FYI
, "nativeFileSystem=%s\n", tcon
->nativeFileSystem
);
4144 if ((smb_buffer_response
->WordCount
== 3) ||
4145 (smb_buffer_response
->WordCount
== 7))
4146 /* field is in same location */
4147 tcon
->Flags
= le16_to_cpu(pSMBr
->OptionalSupport
);
4150 cifs_dbg(FYI
, "Tcon flags: 0x%x\n", tcon
->Flags
);
4153 cifs_buf_release(smb_buffer
);
4157 static void delayed_free(struct rcu_head
*p
)
4159 struct cifs_sb_info
*sbi
= container_of(p
, struct cifs_sb_info
, rcu
);
4160 unload_nls(sbi
->local_nls
);
4165 cifs_umount(struct cifs_sb_info
*cifs_sb
)
4167 struct rb_root
*root
= &cifs_sb
->tlink_tree
;
4168 struct rb_node
*node
;
4169 struct tcon_link
*tlink
;
4171 cancel_delayed_work_sync(&cifs_sb
->prune_tlinks
);
4173 spin_lock(&cifs_sb
->tlink_tree_lock
);
4174 while ((node
= rb_first(root
))) {
4175 tlink
= rb_entry(node
, struct tcon_link
, tl_rbnode
);
4176 cifs_get_tlink(tlink
);
4177 clear_bit(TCON_LINK_IN_TREE
, &tlink
->tl_flags
);
4178 rb_erase(node
, root
);
4180 spin_unlock(&cifs_sb
->tlink_tree_lock
);
4181 cifs_put_tlink(tlink
);
4182 spin_lock(&cifs_sb
->tlink_tree_lock
);
4184 spin_unlock(&cifs_sb
->tlink_tree_lock
);
4186 kfree(cifs_sb
->mountdata
);
4187 kfree(cifs_sb
->prepath
);
4188 call_rcu(&cifs_sb
->rcu
, delayed_free
);
4192 cifs_negotiate_protocol(const unsigned int xid
, struct cifs_ses
*ses
)
4195 struct TCP_Server_Info
*server
= ses
->server
;
4197 if (!server
->ops
->need_neg
|| !server
->ops
->negotiate
)
4200 /* only send once per connect */
4201 if (!server
->ops
->need_neg(server
))
4204 set_credits(server
, 1);
4206 rc
= server
->ops
->negotiate(xid
, ses
);
4208 spin_lock(&GlobalMid_Lock
);
4209 if (server
->tcpStatus
== CifsNeedNegotiate
)
4210 server
->tcpStatus
= CifsGood
;
4213 spin_unlock(&GlobalMid_Lock
);
4220 cifs_setup_session(const unsigned int xid
, struct cifs_ses
*ses
,
4221 struct nls_table
*nls_info
)
4224 struct TCP_Server_Info
*server
= ses
->server
;
4226 ses
->capabilities
= server
->capabilities
;
4227 if (linuxExtEnabled
== 0)
4228 ses
->capabilities
&= (~server
->vals
->cap_unix
);
4230 cifs_dbg(FYI
, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n",
4231 server
->sec_mode
, server
->capabilities
, server
->timeAdj
);
4233 if (ses
->auth_key
.response
) {
4234 cifs_dbg(VFS
, "Free previous auth_key.response = %p\n",
4235 ses
->auth_key
.response
);
4236 kfree(ses
->auth_key
.response
);
4237 ses
->auth_key
.response
= NULL
;
4238 ses
->auth_key
.len
= 0;
4241 if (server
->ops
->sess_setup
)
4242 rc
= server
->ops
->sess_setup(xid
, ses
, nls_info
);
4245 cifs_dbg(VFS
, "Send error in SessSetup = %d\n", rc
);
4251 cifs_set_vol_auth(struct smb_vol
*vol
, struct cifs_ses
*ses
)
4253 vol
->sectype
= ses
->sectype
;
4255 /* krb5 is special, since we don't need username or pw */
4256 if (vol
->sectype
== Kerberos
)
4259 return cifs_set_cifscreds(vol
, ses
);
4262 static struct cifs_tcon
*
4263 cifs_construct_tcon(struct cifs_sb_info
*cifs_sb
, kuid_t fsuid
)
4266 struct cifs_tcon
*master_tcon
= cifs_sb_master_tcon(cifs_sb
);
4267 struct cifs_ses
*ses
;
4268 struct cifs_tcon
*tcon
= NULL
;
4269 struct smb_vol
*vol_info
;
4271 vol_info
= kzalloc(sizeof(*vol_info
), GFP_KERNEL
);
4272 if (vol_info
== NULL
)
4273 return ERR_PTR(-ENOMEM
);
4275 vol_info
->local_nls
= cifs_sb
->local_nls
;
4276 vol_info
->linux_uid
= fsuid
;
4277 vol_info
->cred_uid
= fsuid
;
4278 vol_info
->UNC
= master_tcon
->treeName
;
4279 vol_info
->retry
= master_tcon
->retry
;
4280 vol_info
->nocase
= master_tcon
->nocase
;
4281 vol_info
->local_lease
= master_tcon
->local_lease
;
4282 vol_info
->no_linux_ext
= !master_tcon
->unix_ext
;
4283 vol_info
->sectype
= master_tcon
->ses
->sectype
;
4284 vol_info
->sign
= master_tcon
->ses
->sign
;
4286 rc
= cifs_set_vol_auth(vol_info
, master_tcon
->ses
);
4292 /* get a reference for the same TCP session */
4293 spin_lock(&cifs_tcp_ses_lock
);
4294 ++master_tcon
->ses
->server
->srv_count
;
4295 spin_unlock(&cifs_tcp_ses_lock
);
4297 ses
= cifs_get_smb_ses(master_tcon
->ses
->server
, vol_info
);
4299 tcon
= (struct cifs_tcon
*)ses
;
4300 cifs_put_tcp_session(master_tcon
->ses
->server
, 0);
4304 tcon
= cifs_get_tcon(ses
, vol_info
);
4306 cifs_put_smb_ses(ses
);
4311 reset_cifs_unix_caps(0, tcon
, NULL
, vol_info
);
4313 kfree(vol_info
->username
);
4314 kzfree(vol_info
->password
);
4321 cifs_sb_master_tcon(struct cifs_sb_info
*cifs_sb
)
4323 return tlink_tcon(cifs_sb_master_tlink(cifs_sb
));
4326 /* find and return a tlink with given uid */
4327 static struct tcon_link
*
4328 tlink_rb_search(struct rb_root
*root
, kuid_t uid
)
4330 struct rb_node
*node
= root
->rb_node
;
4331 struct tcon_link
*tlink
;
4334 tlink
= rb_entry(node
, struct tcon_link
, tl_rbnode
);
4336 if (uid_gt(tlink
->tl_uid
, uid
))
4337 node
= node
->rb_left
;
4338 else if (uid_lt(tlink
->tl_uid
, uid
))
4339 node
= node
->rb_right
;
4346 /* insert a tcon_link into the tree */
4348 tlink_rb_insert(struct rb_root
*root
, struct tcon_link
*new_tlink
)
4350 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
4351 struct tcon_link
*tlink
;
4354 tlink
= rb_entry(*new, struct tcon_link
, tl_rbnode
);
4357 if (uid_gt(tlink
->tl_uid
, new_tlink
->tl_uid
))
4358 new = &((*new)->rb_left
);
4360 new = &((*new)->rb_right
);
4363 rb_link_node(&new_tlink
->tl_rbnode
, parent
, new);
4364 rb_insert_color(&new_tlink
->tl_rbnode
, root
);
4368 * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the
4371 * If the superblock doesn't refer to a multiuser mount, then just return
4372 * the master tcon for the mount.
4374 * First, search the rbtree for an existing tcon for this fsuid. If one
4375 * exists, then check to see if it's pending construction. If it is then wait
4376 * for construction to complete. Once it's no longer pending, check to see if
4377 * it failed and either return an error or retry construction, depending on
4380 * If one doesn't exist then insert a new tcon_link struct into the tree and
4381 * try to construct a new one.
4384 cifs_sb_tlink(struct cifs_sb_info
*cifs_sb
)
4387 kuid_t fsuid
= current_fsuid();
4388 struct tcon_link
*tlink
, *newtlink
;
4390 if (!(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MULTIUSER
))
4391 return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb
));
4393 spin_lock(&cifs_sb
->tlink_tree_lock
);
4394 tlink
= tlink_rb_search(&cifs_sb
->tlink_tree
, fsuid
);
4396 cifs_get_tlink(tlink
);
4397 spin_unlock(&cifs_sb
->tlink_tree_lock
);
4399 if (tlink
== NULL
) {
4400 newtlink
= kzalloc(sizeof(*tlink
), GFP_KERNEL
);
4401 if (newtlink
== NULL
)
4402 return ERR_PTR(-ENOMEM
);
4403 newtlink
->tl_uid
= fsuid
;
4404 newtlink
->tl_tcon
= ERR_PTR(-EACCES
);
4405 set_bit(TCON_LINK_PENDING
, &newtlink
->tl_flags
);
4406 set_bit(TCON_LINK_IN_TREE
, &newtlink
->tl_flags
);
4407 cifs_get_tlink(newtlink
);
4409 spin_lock(&cifs_sb
->tlink_tree_lock
);
4410 /* was one inserted after previous search? */
4411 tlink
= tlink_rb_search(&cifs_sb
->tlink_tree
, fsuid
);
4413 cifs_get_tlink(tlink
);
4414 spin_unlock(&cifs_sb
->tlink_tree_lock
);
4416 goto wait_for_construction
;
4419 tlink_rb_insert(&cifs_sb
->tlink_tree
, tlink
);
4420 spin_unlock(&cifs_sb
->tlink_tree_lock
);
4422 wait_for_construction
:
4423 ret
= wait_on_bit(&tlink
->tl_flags
, TCON_LINK_PENDING
,
4424 TASK_INTERRUPTIBLE
);
4426 cifs_put_tlink(tlink
);
4427 return ERR_PTR(-ERESTARTSYS
);
4430 /* if it's good, return it */
4431 if (!IS_ERR(tlink
->tl_tcon
))
4434 /* return error if we tried this already recently */
4435 if (time_before(jiffies
, tlink
->tl_time
+ TLINK_ERROR_EXPIRE
)) {
4436 cifs_put_tlink(tlink
);
4437 return ERR_PTR(-EACCES
);
4440 if (test_and_set_bit(TCON_LINK_PENDING
, &tlink
->tl_flags
))
4441 goto wait_for_construction
;
4444 tlink
->tl_tcon
= cifs_construct_tcon(cifs_sb
, fsuid
);
4445 clear_bit(TCON_LINK_PENDING
, &tlink
->tl_flags
);
4446 wake_up_bit(&tlink
->tl_flags
, TCON_LINK_PENDING
);
4448 if (IS_ERR(tlink
->tl_tcon
)) {
4449 cifs_put_tlink(tlink
);
4450 return ERR_PTR(-EACCES
);
4457 * periodic workqueue job that scans tcon_tree for a superblock and closes
4461 cifs_prune_tlinks(struct work_struct
*work
)
4463 struct cifs_sb_info
*cifs_sb
= container_of(work
, struct cifs_sb_info
,
4465 struct rb_root
*root
= &cifs_sb
->tlink_tree
;
4466 struct rb_node
*node
= rb_first(root
);
4467 struct rb_node
*tmp
;
4468 struct tcon_link
*tlink
;
4471 * Because we drop the spinlock in the loop in order to put the tlink
4472 * it's not guarded against removal of links from the tree. The only
4473 * places that remove entries from the tree are this function and
4474 * umounts. Because this function is non-reentrant and is canceled
4475 * before umount can proceed, this is safe.
4477 spin_lock(&cifs_sb
->tlink_tree_lock
);
4478 node
= rb_first(root
);
4479 while (node
!= NULL
) {
4481 node
= rb_next(tmp
);
4482 tlink
= rb_entry(tmp
, struct tcon_link
, tl_rbnode
);
4484 if (test_bit(TCON_LINK_MASTER
, &tlink
->tl_flags
) ||
4485 atomic_read(&tlink
->tl_count
) != 0 ||
4486 time_after(tlink
->tl_time
+ TLINK_IDLE_EXPIRE
, jiffies
))
4489 cifs_get_tlink(tlink
);
4490 clear_bit(TCON_LINK_IN_TREE
, &tlink
->tl_flags
);
4491 rb_erase(tmp
, root
);
4493 spin_unlock(&cifs_sb
->tlink_tree_lock
);
4494 cifs_put_tlink(tlink
);
4495 spin_lock(&cifs_sb
->tlink_tree_lock
);
4497 spin_unlock(&cifs_sb
->tlink_tree_lock
);
4499 queue_delayed_work(cifsiod_wq
, &cifs_sb
->prune_tlinks
,