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/mm.h>
25 #include <linux/sched/signal.h>
26 #include <linux/list.h>
27 #include <linux/wait.h>
28 #include <linux/slab.h>
29 #include <linux/pagemap.h>
30 #include <linux/ctype.h>
31 #include <linux/utsname.h>
32 #include <linux/mempool.h>
33 #include <linux/delay.h>
34 #include <linux/completion.h>
35 #include <linux/kthread.h>
36 #include <linux/pagevec.h>
37 #include <linux/freezer.h>
38 #include <linux/namei.h>
39 #include <linux/uuid.h>
40 #include <linux/uaccess.h>
41 #include <asm/processor.h>
42 #include <linux/inet.h>
43 #include <linux/module.h>
44 #include <keys/user-type.h>
46 #include <linux/parser.h>
47 #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"
59 #include "smbdirect.h"
60 #include "dns_resolve.h"
61 #ifdef CONFIG_CIFS_DFS_UPCALL
62 #include "dfs_cache.h"
65 extern mempool_t
*cifs_req_poolp
;
66 extern bool disable_legacy_dialects
;
68 /* FIXME: should these be tunable? */
69 #define TLINK_ERROR_EXPIRE (1 * HZ)
70 #define TLINK_IDLE_EXPIRE (600 * HZ)
72 /* Drop the connection to not overload the server */
73 #define NUM_STATUS_IO_TIMEOUT 5
76 /* Mount options that take no arguments */
77 Opt_user_xattr
, Opt_nouser_xattr
,
78 Opt_forceuid
, Opt_noforceuid
,
79 Opt_forcegid
, Opt_noforcegid
,
80 Opt_noblocksend
, Opt_noautotune
, Opt_nolease
,
81 Opt_hard
, Opt_soft
, Opt_perm
, Opt_noperm
, Opt_nodelete
,
82 Opt_mapposix
, Opt_nomapposix
,
83 Opt_mapchars
, Opt_nomapchars
, Opt_sfu
,
84 Opt_nosfu
, Opt_nodfs
, Opt_posixpaths
,
85 Opt_noposixpaths
, Opt_nounix
, Opt_unix
,
88 Opt_handlecache
, Opt_nohandlecache
,
89 Opt_forcemandatorylock
, Opt_setuidfromacl
, Opt_setuids
,
90 Opt_nosetuids
, Opt_dynperm
, Opt_nodynperm
,
91 Opt_nohard
, Opt_nosoft
,
93 Opt_nostrictsync
, Opt_strictsync
,
94 Opt_serverino
, Opt_noserverino
,
95 Opt_rwpidforward
, Opt_cifsacl
, Opt_nocifsacl
,
96 Opt_acl
, Opt_noacl
, Opt_locallease
,
97 Opt_sign
, Opt_ignore_signature
, Opt_seal
, Opt_noac
,
98 Opt_fsc
, Opt_mfsymlinks
,
99 Opt_multiuser
, Opt_sloppy
, Opt_nosharesock
,
100 Opt_persistent
, Opt_nopersistent
,
101 Opt_resilient
, Opt_noresilient
,
102 Opt_domainauto
, Opt_rdma
, Opt_modesid
, Opt_rootfs
,
103 Opt_multichannel
, Opt_nomultichannel
,
106 /* Mount options which take numeric value */
107 Opt_backupuid
, Opt_backupgid
, Opt_uid
,
108 Opt_cruid
, Opt_gid
, Opt_file_mode
,
109 Opt_dirmode
, Opt_port
,
111 Opt_blocksize
, Opt_rsize
, Opt_wsize
, Opt_actimeo
,
112 Opt_echo_interval
, Opt_max_credits
, Opt_handletimeout
,
113 Opt_snapshot
, Opt_max_channels
,
115 /* Mount options which take string value */
116 Opt_user
, Opt_pass
, Opt_ip
,
117 Opt_domain
, Opt_srcaddr
, Opt_iocharset
,
118 Opt_netbiosname
, Opt_servern
,
119 Opt_ver
, Opt_vers
, Opt_sec
, Opt_cache
,
121 /* Mount options to be ignored */
124 /* Options which could be blank */
132 static const match_table_t cifs_mount_option_tokens
= {
134 { Opt_user_xattr
, "user_xattr" },
135 { Opt_nouser_xattr
, "nouser_xattr" },
136 { Opt_forceuid
, "forceuid" },
137 { Opt_noforceuid
, "noforceuid" },
138 { Opt_forcegid
, "forcegid" },
139 { Opt_noforcegid
, "noforcegid" },
140 { Opt_noblocksend
, "noblocksend" },
141 { Opt_noautotune
, "noautotune" },
142 { Opt_nolease
, "nolease" },
143 { Opt_hard
, "hard" },
144 { Opt_soft
, "soft" },
145 { Opt_perm
, "perm" },
146 { Opt_noperm
, "noperm" },
147 { Opt_nodelete
, "nodelete" },
148 { Opt_mapchars
, "mapchars" }, /* SFU style */
149 { Opt_nomapchars
, "nomapchars" },
150 { Opt_mapposix
, "mapposix" }, /* SFM style */
151 { Opt_nomapposix
, "nomapposix" },
153 { Opt_nosfu
, "nosfu" },
154 { Opt_nodfs
, "nodfs" },
155 { Opt_posixpaths
, "posixpaths" },
156 { Opt_noposixpaths
, "noposixpaths" },
157 { Opt_nounix
, "nounix" },
158 { Opt_nounix
, "nolinux" },
159 { Opt_nounix
, "noposix" },
160 { Opt_unix
, "unix" },
161 { Opt_unix
, "linux" },
162 { Opt_unix
, "posix" },
163 { Opt_nocase
, "nocase" },
164 { Opt_nocase
, "ignorecase" },
166 { Opt_nobrl
, "nobrl" },
167 { Opt_handlecache
, "handlecache" },
168 { Opt_nohandlecache
, "nohandlecache" },
169 { Opt_nobrl
, "nolock" },
170 { Opt_forcemandatorylock
, "forcemandatorylock" },
171 { Opt_forcemandatorylock
, "forcemand" },
172 { Opt_setuids
, "setuids" },
173 { Opt_nosetuids
, "nosetuids" },
174 { Opt_setuidfromacl
, "idsfromsid" },
175 { Opt_dynperm
, "dynperm" },
176 { Opt_nodynperm
, "nodynperm" },
177 { Opt_nohard
, "nohard" },
178 { Opt_nosoft
, "nosoft" },
179 { Opt_nointr
, "nointr" },
180 { Opt_intr
, "intr" },
181 { Opt_nostrictsync
, "nostrictsync" },
182 { Opt_strictsync
, "strictsync" },
183 { Opt_serverino
, "serverino" },
184 { Opt_noserverino
, "noserverino" },
185 { Opt_rwpidforward
, "rwpidforward" },
186 { Opt_modesid
, "modefromsid" },
187 { Opt_cifsacl
, "cifsacl" },
188 { Opt_nocifsacl
, "nocifsacl" },
190 { Opt_noacl
, "noacl" },
191 { Opt_locallease
, "locallease" },
192 { Opt_sign
, "sign" },
193 { Opt_ignore_signature
, "signloosely" },
194 { Opt_seal
, "seal" },
195 { Opt_noac
, "noac" },
197 { Opt_mfsymlinks
, "mfsymlinks" },
198 { Opt_multiuser
, "multiuser" },
199 { Opt_sloppy
, "sloppy" },
200 { Opt_nosharesock
, "nosharesock" },
201 { Opt_persistent
, "persistenthandles"},
202 { Opt_nopersistent
, "nopersistenthandles"},
203 { Opt_resilient
, "resilienthandles"},
204 { Opt_noresilient
, "noresilienthandles"},
205 { Opt_domainauto
, "domainauto"},
207 { Opt_multichannel
, "multichannel" },
208 { Opt_nomultichannel
, "nomultichannel" },
210 { Opt_backupuid
, "backupuid=%s" },
211 { Opt_backupgid
, "backupgid=%s" },
212 { Opt_uid
, "uid=%s" },
213 { Opt_cruid
, "cruid=%s" },
214 { Opt_gid
, "gid=%s" },
215 { Opt_file_mode
, "file_mode=%s" },
216 { Opt_dirmode
, "dirmode=%s" },
217 { Opt_dirmode
, "dir_mode=%s" },
218 { Opt_port
, "port=%s" },
219 { Opt_min_enc_offload
, "esize=%s" },
220 { Opt_blocksize
, "bsize=%s" },
221 { Opt_rsize
, "rsize=%s" },
222 { Opt_wsize
, "wsize=%s" },
223 { Opt_actimeo
, "actimeo=%s" },
224 { Opt_handletimeout
, "handletimeout=%s" },
225 { Opt_echo_interval
, "echo_interval=%s" },
226 { Opt_max_credits
, "max_credits=%s" },
227 { Opt_snapshot
, "snapshot=%s" },
228 { Opt_max_channels
, "max_channels=%s" },
229 { Opt_compress
, "compress=%s" },
231 { Opt_blank_user
, "user=" },
232 { Opt_blank_user
, "username=" },
233 { Opt_user
, "user=%s" },
234 { Opt_user
, "username=%s" },
235 { Opt_blank_pass
, "pass=" },
236 { Opt_blank_pass
, "password=" },
237 { Opt_pass
, "pass=%s" },
238 { Opt_pass
, "password=%s" },
239 { Opt_blank_ip
, "ip=" },
240 { Opt_blank_ip
, "addr=" },
242 { Opt_ip
, "addr=%s" },
243 { Opt_ignore
, "unc=%s" },
244 { Opt_ignore
, "target=%s" },
245 { Opt_ignore
, "path=%s" },
246 { Opt_domain
, "dom=%s" },
247 { Opt_domain
, "domain=%s" },
248 { Opt_domain
, "workgroup=%s" },
249 { Opt_srcaddr
, "srcaddr=%s" },
250 { Opt_ignore
, "prefixpath=%s" },
251 { Opt_iocharset
, "iocharset=%s" },
252 { Opt_netbiosname
, "netbiosname=%s" },
253 { Opt_servern
, "servern=%s" },
254 { Opt_ver
, "ver=%s" },
255 { Opt_vers
, "vers=%s" },
256 { Opt_sec
, "sec=%s" },
257 { Opt_cache
, "cache=%s" },
259 { Opt_ignore
, "cred" },
260 { Opt_ignore
, "credentials" },
261 { Opt_ignore
, "cred=%s" },
262 { Opt_ignore
, "credentials=%s" },
263 { Opt_ignore
, "guest" },
264 { Opt_ignore
, "rw" },
265 { Opt_ignore
, "ro" },
266 { Opt_ignore
, "suid" },
267 { Opt_ignore
, "nosuid" },
268 { Opt_ignore
, "exec" },
269 { Opt_ignore
, "noexec" },
270 { Opt_ignore
, "nodev" },
271 { Opt_ignore
, "noauto" },
272 { Opt_ignore
, "dev" },
273 { Opt_ignore
, "mand" },
274 { Opt_ignore
, "nomand" },
275 { Opt_ignore
, "relatime" },
276 { Opt_ignore
, "_netdev" },
277 { Opt_rootfs
, "rootfs" },
283 Opt_sec_krb5
, Opt_sec_krb5i
, Opt_sec_krb5p
,
284 Opt_sec_ntlmsspi
, Opt_sec_ntlmssp
,
285 Opt_ntlm
, Opt_sec_ntlmi
, Opt_sec_ntlmv2
,
286 Opt_sec_ntlmv2i
, Opt_sec_lanman
,
292 static const match_table_t cifs_secflavor_tokens
= {
293 { Opt_sec_krb5
, "krb5" },
294 { Opt_sec_krb5i
, "krb5i" },
295 { Opt_sec_krb5p
, "krb5p" },
296 { Opt_sec_ntlmsspi
, "ntlmsspi" },
297 { Opt_sec_ntlmssp
, "ntlmssp" },
298 { Opt_ntlm
, "ntlm" },
299 { Opt_sec_ntlmi
, "ntlmi" },
300 { Opt_sec_ntlmv2
, "nontlm" },
301 { Opt_sec_ntlmv2
, "ntlmv2" },
302 { Opt_sec_ntlmv2i
, "ntlmv2i" },
303 { Opt_sec_lanman
, "lanman" },
304 { Opt_sec_none
, "none" },
306 { Opt_sec_err
, NULL
}
319 static const match_table_t cifs_cacheflavor_tokens
= {
320 { Opt_cache_loose
, "loose" },
321 { Opt_cache_strict
, "strict" },
322 { Opt_cache_none
, "none" },
323 { Opt_cache_ro
, "ro" },
324 { Opt_cache_rw
, "singleclient" },
325 { Opt_cache_err
, NULL
}
328 static const match_table_t cifs_smb_version_tokens
= {
329 { Smb_1
, SMB1_VERSION_STRING
},
330 { Smb_20
, SMB20_VERSION_STRING
},
331 { Smb_21
, SMB21_VERSION_STRING
},
332 { Smb_30
, SMB30_VERSION_STRING
},
333 { Smb_302
, SMB302_VERSION_STRING
},
334 { Smb_302
, ALT_SMB302_VERSION_STRING
},
335 { Smb_311
, SMB311_VERSION_STRING
},
336 { Smb_311
, ALT_SMB311_VERSION_STRING
},
337 { Smb_3any
, SMB3ANY_VERSION_STRING
},
338 { Smb_default
, SMBDEFAULT_VERSION_STRING
},
339 { Smb_version_err
, NULL
}
342 static int ip_connect(struct TCP_Server_Info
*server
);
343 static int generic_ip_connect(struct TCP_Server_Info
*server
);
344 static void tlink_rb_insert(struct rb_root
*root
, struct tcon_link
*new_tlink
);
345 static void cifs_prune_tlinks(struct work_struct
*work
);
346 static char *extract_hostname(const char *unc
);
349 * Resolve hostname and set ip addr in tcp ses. Useful for hostnames that may
350 * get their ip addresses changed at some point.
352 * This should be called with server->srv_mutex held.
354 #ifdef CONFIG_CIFS_DFS_UPCALL
355 static int reconn_set_ipaddr(struct TCP_Server_Info
*server
)
359 char *unc
, *ipaddr
= NULL
;
361 if (!server
->hostname
)
364 len
= strlen(server
->hostname
) + 3;
366 unc
= kmalloc(len
, GFP_KERNEL
);
368 cifs_dbg(FYI
, "%s: failed to create UNC path\n", __func__
);
371 scnprintf(unc
, len
, "\\\\%s", server
->hostname
);
373 rc
= dns_resolve_server_name_to_ip(unc
, &ipaddr
);
377 cifs_dbg(FYI
, "%s: failed to resolve server part of %s to IP: %d\n",
378 __func__
, server
->hostname
, rc
);
382 spin_lock(&cifs_tcp_ses_lock
);
383 rc
= cifs_convert_address((struct sockaddr
*)&server
->dstaddr
, ipaddr
,
385 spin_unlock(&cifs_tcp_ses_lock
);
391 static inline int reconn_set_ipaddr(struct TCP_Server_Info
*server
)
397 #ifdef CONFIG_CIFS_DFS_UPCALL
398 /* These functions must be called with server->srv_mutex held */
399 static void reconn_set_next_dfs_target(struct TCP_Server_Info
*server
,
400 struct cifs_sb_info
*cifs_sb
,
401 struct dfs_cache_tgt_list
*tgt_list
,
402 struct dfs_cache_tgt_iterator
**tgt_it
)
406 if (!cifs_sb
|| !cifs_sb
->origin_fullpath
)
410 *tgt_it
= dfs_cache_get_tgt_iterator(tgt_list
);
412 *tgt_it
= dfs_cache_get_next_tgt(tgt_list
, *tgt_it
);
414 *tgt_it
= dfs_cache_get_tgt_iterator(tgt_list
);
417 cifs_dbg(FYI
, "%s: UNC: %s\n", __func__
, cifs_sb
->origin_fullpath
);
419 name
= dfs_cache_get_tgt_name(*tgt_it
);
421 kfree(server
->hostname
);
423 server
->hostname
= extract_hostname(name
);
424 if (IS_ERR(server
->hostname
)) {
426 "%s: failed to extract hostname from target: %ld\n",
427 __func__
, PTR_ERR(server
->hostname
));
431 static inline int reconn_setup_dfs_targets(struct cifs_sb_info
*cifs_sb
,
432 struct dfs_cache_tgt_list
*tl
)
434 if (!cifs_sb
->origin_fullpath
)
436 return dfs_cache_noreq_find(cifs_sb
->origin_fullpath
+ 1, NULL
, tl
);
441 * cifs tcp session reconnection
443 * mark tcp session as reconnecting so temporarily locked
444 * mark all smb sessions as reconnecting for tcp session
445 * reconnect tcp session
446 * wake up waiters on reconnection? - (not needed currently)
449 cifs_reconnect(struct TCP_Server_Info
*server
)
452 struct list_head
*tmp
, *tmp2
;
453 struct cifs_ses
*ses
;
454 struct cifs_tcon
*tcon
;
455 struct mid_q_entry
*mid_entry
;
456 struct list_head retry_list
;
457 #ifdef CONFIG_CIFS_DFS_UPCALL
458 struct super_block
*sb
= NULL
;
459 struct cifs_sb_info
*cifs_sb
= NULL
;
460 struct dfs_cache_tgt_list tgt_list
= {0};
461 struct dfs_cache_tgt_iterator
*tgt_it
= NULL
;
464 spin_lock(&GlobalMid_Lock
);
465 server
->nr_targets
= 1;
466 #ifdef CONFIG_CIFS_DFS_UPCALL
467 spin_unlock(&GlobalMid_Lock
);
468 sb
= cifs_get_tcp_super(server
);
471 cifs_dbg(FYI
, "%s: will not do DFS failover: rc = %d\n",
475 cifs_sb
= CIFS_SB(sb
);
476 rc
= reconn_setup_dfs_targets(cifs_sb
, &tgt_list
);
479 if (rc
!= -EOPNOTSUPP
) {
480 cifs_server_dbg(VFS
, "%s: no target servers for DFS failover\n",
484 server
->nr_targets
= dfs_cache_get_nr_tgts(&tgt_list
);
487 cifs_dbg(FYI
, "%s: will retry %d target(s)\n", __func__
,
489 spin_lock(&GlobalMid_Lock
);
491 if (server
->tcpStatus
== CifsExiting
) {
492 /* the demux thread will exit normally
493 next time through the loop */
494 spin_unlock(&GlobalMid_Lock
);
495 #ifdef CONFIG_CIFS_DFS_UPCALL
496 dfs_cache_free_tgts(&tgt_list
);
497 cifs_put_tcp_super(sb
);
499 wake_up(&server
->response_q
);
502 server
->tcpStatus
= CifsNeedReconnect
;
503 spin_unlock(&GlobalMid_Lock
);
505 server
->max_read
= 0;
507 cifs_dbg(FYI
, "Mark tcp session as need reconnect\n");
508 trace_smb3_reconnect(server
->CurrentMid
, server
->hostname
);
510 /* before reconnecting the tcp session, mark the smb session (uid)
511 and the tid bad so they are not used until reconnected */
512 cifs_dbg(FYI
, "%s: marking sessions and tcons for reconnect\n",
514 spin_lock(&cifs_tcp_ses_lock
);
515 list_for_each(tmp
, &server
->smb_ses_list
) {
516 ses
= list_entry(tmp
, struct cifs_ses
, smb_ses_list
);
517 ses
->need_reconnect
= true;
518 list_for_each(tmp2
, &ses
->tcon_list
) {
519 tcon
= list_entry(tmp2
, struct cifs_tcon
, tcon_list
);
520 tcon
->need_reconnect
= true;
523 ses
->tcon_ipc
->need_reconnect
= true;
525 spin_unlock(&cifs_tcp_ses_lock
);
527 /* do not want to be sending data on a socket we are freeing */
528 cifs_dbg(FYI
, "%s: tearing down socket\n", __func__
);
529 mutex_lock(&server
->srv_mutex
);
530 if (server
->ssocket
) {
531 cifs_dbg(FYI
, "State: 0x%x Flags: 0x%lx\n",
532 server
->ssocket
->state
, server
->ssocket
->flags
);
533 kernel_sock_shutdown(server
->ssocket
, SHUT_WR
);
534 cifs_dbg(FYI
, "Post shutdown state: 0x%x Flags: 0x%lx\n",
535 server
->ssocket
->state
, server
->ssocket
->flags
);
536 sock_release(server
->ssocket
);
537 server
->ssocket
= NULL
;
539 server
->sequence_number
= 0;
540 server
->session_estab
= false;
541 kfree(server
->session_key
.response
);
542 server
->session_key
.response
= NULL
;
543 server
->session_key
.len
= 0;
544 server
->lstrp
= jiffies
;
546 /* mark submitted MIDs for retry and issue callback */
547 INIT_LIST_HEAD(&retry_list
);
548 cifs_dbg(FYI
, "%s: moving mids to private list\n", __func__
);
549 spin_lock(&GlobalMid_Lock
);
550 list_for_each_safe(tmp
, tmp2
, &server
->pending_mid_q
) {
551 mid_entry
= list_entry(tmp
, struct mid_q_entry
, qhead
);
552 kref_get(&mid_entry
->refcount
);
553 if (mid_entry
->mid_state
== MID_REQUEST_SUBMITTED
)
554 mid_entry
->mid_state
= MID_RETRY_NEEDED
;
555 list_move(&mid_entry
->qhead
, &retry_list
);
556 mid_entry
->mid_flags
|= MID_DELETED
;
558 spin_unlock(&GlobalMid_Lock
);
559 mutex_unlock(&server
->srv_mutex
);
561 cifs_dbg(FYI
, "%s: issuing mid callbacks\n", __func__
);
562 list_for_each_safe(tmp
, tmp2
, &retry_list
) {
563 mid_entry
= list_entry(tmp
, struct mid_q_entry
, qhead
);
564 list_del_init(&mid_entry
->qhead
);
565 mid_entry
->callback(mid_entry
);
566 cifs_mid_q_entry_release(mid_entry
);
569 if (cifs_rdma_enabled(server
)) {
570 mutex_lock(&server
->srv_mutex
);
571 smbd_destroy(server
);
572 mutex_unlock(&server
->srv_mutex
);
578 mutex_lock(&server
->srv_mutex
);
579 #ifdef CONFIG_CIFS_DFS_UPCALL
581 * Set up next DFS target server (if any) for reconnect. If DFS
582 * feature is disabled, then we will retry last server we
583 * connected to before.
585 reconn_set_next_dfs_target(server
, cifs_sb
, &tgt_list
, &tgt_it
);
587 rc
= reconn_set_ipaddr(server
);
589 cifs_dbg(FYI
, "%s: failed to resolve hostname: %d\n",
593 if (cifs_rdma_enabled(server
))
594 rc
= smbd_reconnect(server
);
596 rc
= generic_ip_connect(server
);
598 cifs_dbg(FYI
, "reconnect error %d\n", rc
);
599 mutex_unlock(&server
->srv_mutex
);
602 atomic_inc(&tcpSesReconnectCount
);
603 set_credits(server
, 1);
604 spin_lock(&GlobalMid_Lock
);
605 if (server
->tcpStatus
!= CifsExiting
)
606 server
->tcpStatus
= CifsNeedNegotiate
;
607 spin_unlock(&GlobalMid_Lock
);
608 mutex_unlock(&server
->srv_mutex
);
610 } while (server
->tcpStatus
== CifsNeedReconnect
);
612 #ifdef CONFIG_CIFS_DFS_UPCALL
614 rc
= dfs_cache_noreq_update_tgthint(cifs_sb
->origin_fullpath
+ 1,
617 cifs_server_dbg(VFS
, "%s: failed to update DFS target hint: rc = %d\n",
620 rc
= dfs_cache_update_vol(cifs_sb
->origin_fullpath
, server
);
622 cifs_server_dbg(VFS
, "%s: failed to update vol info in DFS cache: rc = %d\n",
625 dfs_cache_free_tgts(&tgt_list
);
629 cifs_put_tcp_super(sb
);
631 if (server
->tcpStatus
== CifsNeedNegotiate
)
632 mod_delayed_work(cifsiod_wq
, &server
->echo
, 0);
634 wake_up(&server
->response_q
);
639 cifs_echo_request(struct work_struct
*work
)
642 struct TCP_Server_Info
*server
= container_of(work
,
643 struct TCP_Server_Info
, echo
.work
);
644 unsigned long echo_interval
;
647 * If we need to renegotiate, set echo interval to zero to
648 * immediately call echo service where we can renegotiate.
650 if (server
->tcpStatus
== CifsNeedNegotiate
)
653 echo_interval
= server
->echo_interval
;
656 * We cannot send an echo if it is disabled.
657 * Also, no need to ping if we got a response recently.
660 if (server
->tcpStatus
== CifsNeedReconnect
||
661 server
->tcpStatus
== CifsExiting
||
662 server
->tcpStatus
== CifsNew
||
663 (server
->ops
->can_echo
&& !server
->ops
->can_echo(server
)) ||
664 time_before(jiffies
, server
->lstrp
+ echo_interval
- HZ
))
667 rc
= server
->ops
->echo
? server
->ops
->echo(server
) : -ENOSYS
;
669 cifs_dbg(FYI
, "Unable to send echo request to server: %s\n",
673 queue_delayed_work(cifsiod_wq
, &server
->echo
, server
->echo_interval
);
677 allocate_buffers(struct TCP_Server_Info
*server
)
679 if (!server
->bigbuf
) {
680 server
->bigbuf
= (char *)cifs_buf_get();
681 if (!server
->bigbuf
) {
682 cifs_server_dbg(VFS
, "No memory for large SMB response\n");
684 /* retry will check if exiting */
687 } else if (server
->large_buf
) {
688 /* we are reusing a dirty large buf, clear its start */
689 memset(server
->bigbuf
, 0, HEADER_SIZE(server
));
692 if (!server
->smallbuf
) {
693 server
->smallbuf
= (char *)cifs_small_buf_get();
694 if (!server
->smallbuf
) {
695 cifs_server_dbg(VFS
, "No memory for SMB response\n");
697 /* retry will check if exiting */
700 /* beginning of smb buffer is cleared in our buf_get */
702 /* if existing small buf clear beginning */
703 memset(server
->smallbuf
, 0, HEADER_SIZE(server
));
710 server_unresponsive(struct TCP_Server_Info
*server
)
713 * We need to wait 3 echo intervals to make sure we handle such
715 * 1s client sends a normal SMB request
716 * 2s client gets a response
717 * 30s echo workqueue job pops, and decides we got a response recently
718 * and don't need to send another
720 * 65s kernel_recvmsg times out, and we see that we haven't gotten
721 * a response in >60s.
723 if ((server
->tcpStatus
== CifsGood
||
724 server
->tcpStatus
== CifsNeedNegotiate
) &&
725 time_after(jiffies
, server
->lstrp
+ 3 * server
->echo_interval
)) {
726 cifs_server_dbg(VFS
, "has not responded in %lu seconds. Reconnecting...\n",
727 (3 * server
->echo_interval
) / HZ
);
728 cifs_reconnect(server
);
736 zero_credits(struct TCP_Server_Info
*server
)
740 spin_lock(&server
->req_lock
);
741 val
= server
->credits
+ server
->echo_credits
+ server
->oplock_credits
;
742 if (server
->in_flight
== 0 && val
== 0) {
743 spin_unlock(&server
->req_lock
);
746 spin_unlock(&server
->req_lock
);
751 cifs_readv_from_socket(struct TCP_Server_Info
*server
, struct msghdr
*smb_msg
)
756 smb_msg
->msg_control
= NULL
;
757 smb_msg
->msg_controllen
= 0;
759 for (total_read
= 0; msg_data_left(smb_msg
); total_read
+= length
) {
762 /* reconnect if no credits and no requests in flight */
763 if (zero_credits(server
)) {
764 cifs_reconnect(server
);
765 return -ECONNABORTED
;
768 if (server_unresponsive(server
))
769 return -ECONNABORTED
;
770 if (cifs_rdma_enabled(server
) && server
->smbd_conn
)
771 length
= smbd_recv(server
->smbd_conn
, smb_msg
);
773 length
= sock_recvmsg(server
->ssocket
, smb_msg
, 0);
775 if (server
->tcpStatus
== CifsExiting
)
778 if (server
->tcpStatus
== CifsNeedReconnect
) {
779 cifs_reconnect(server
);
780 return -ECONNABORTED
;
783 if (length
== -ERESTARTSYS
||
787 * Minimum sleep to prevent looping, allowing socket
788 * to clear and app threads to set tcpStatus
789 * CifsNeedReconnect if server hung.
791 usleep_range(1000, 2000);
797 cifs_dbg(FYI
, "Received no data or error: %d\n", length
);
798 cifs_reconnect(server
);
799 return -ECONNABORTED
;
806 cifs_read_from_socket(struct TCP_Server_Info
*server
, char *buf
,
807 unsigned int to_read
)
809 struct msghdr smb_msg
;
810 struct kvec iov
= {.iov_base
= buf
, .iov_len
= to_read
};
811 iov_iter_kvec(&smb_msg
.msg_iter
, READ
, &iov
, 1, to_read
);
813 return cifs_readv_from_socket(server
, &smb_msg
);
817 cifs_read_page_from_socket(struct TCP_Server_Info
*server
, struct page
*page
,
818 unsigned int page_offset
, unsigned int to_read
)
820 struct msghdr smb_msg
;
821 struct bio_vec bv
= {
822 .bv_page
= page
, .bv_len
= to_read
, .bv_offset
= page_offset
};
823 iov_iter_bvec(&smb_msg
.msg_iter
, READ
, &bv
, 1, to_read
);
824 return cifs_readv_from_socket(server
, &smb_msg
);
828 is_smb_response(struct TCP_Server_Info
*server
, unsigned char type
)
831 * The first byte big endian of the length field,
832 * is actually not part of the length but the type
833 * with the most common, zero, as regular data.
836 case RFC1002_SESSION_MESSAGE
:
837 /* Regular SMB response */
839 case RFC1002_SESSION_KEEP_ALIVE
:
840 cifs_dbg(FYI
, "RFC 1002 session keep alive\n");
842 case RFC1002_POSITIVE_SESSION_RESPONSE
:
843 cifs_dbg(FYI
, "RFC 1002 positive session response\n");
845 case RFC1002_NEGATIVE_SESSION_RESPONSE
:
847 * We get this from Windows 98 instead of an error on
848 * SMB negprot response.
850 cifs_dbg(FYI
, "RFC 1002 negative session response\n");
851 /* give server a second to clean up */
854 * Always try 445 first on reconnect since we get NACK
855 * on some if we ever connected to port 139 (the NACK
856 * is since we do not begin with RFC1001 session
859 cifs_set_port((struct sockaddr
*)&server
->dstaddr
, CIFS_PORT
);
860 cifs_reconnect(server
);
863 cifs_server_dbg(VFS
, "RFC 1002 unknown response type 0x%x\n", type
);
864 cifs_reconnect(server
);
871 dequeue_mid(struct mid_q_entry
*mid
, bool malformed
)
873 #ifdef CONFIG_CIFS_STATS2
874 mid
->when_received
= jiffies
;
876 spin_lock(&GlobalMid_Lock
);
878 mid
->mid_state
= MID_RESPONSE_RECEIVED
;
880 mid
->mid_state
= MID_RESPONSE_MALFORMED
;
882 * Trying to handle/dequeue a mid after the send_recv()
883 * function has finished processing it is a bug.
885 if (mid
->mid_flags
& MID_DELETED
)
886 pr_warn_once("trying to dequeue a deleted mid\n");
888 list_del_init(&mid
->qhead
);
889 mid
->mid_flags
|= MID_DELETED
;
891 spin_unlock(&GlobalMid_Lock
);
895 smb2_get_credits_from_hdr(char *buffer
, struct TCP_Server_Info
*server
)
897 struct smb2_sync_hdr
*shdr
= (struct smb2_sync_hdr
*)buffer
;
900 * SMB1 does not use credits.
902 if (server
->vals
->header_preamble_size
)
905 return le16_to_cpu(shdr
->CreditRequest
);
909 handle_mid(struct mid_q_entry
*mid
, struct TCP_Server_Info
*server
,
910 char *buf
, int malformed
)
912 if (server
->ops
->check_trans2
&&
913 server
->ops
->check_trans2(mid
, server
, buf
, malformed
))
915 mid
->credits_received
= smb2_get_credits_from_hdr(buf
, server
);
917 mid
->large_buf
= server
->large_buf
;
918 /* Was previous buf put in mpx struct for multi-rsp? */
919 if (!mid
->multiRsp
) {
920 /* smb buffer will be freed by user thread */
921 if (server
->large_buf
)
922 server
->bigbuf
= NULL
;
924 server
->smallbuf
= NULL
;
926 dequeue_mid(mid
, malformed
);
929 static void clean_demultiplex_info(struct TCP_Server_Info
*server
)
933 /* take it off the list, if it's not already */
934 spin_lock(&cifs_tcp_ses_lock
);
935 list_del_init(&server
->tcp_ses_list
);
936 spin_unlock(&cifs_tcp_ses_lock
);
938 spin_lock(&GlobalMid_Lock
);
939 server
->tcpStatus
= CifsExiting
;
940 spin_unlock(&GlobalMid_Lock
);
941 wake_up_all(&server
->response_q
);
943 /* check if we have blocked requests that need to free */
944 spin_lock(&server
->req_lock
);
945 if (server
->credits
<= 0)
947 spin_unlock(&server
->req_lock
);
949 * Although there should not be any requests blocked on this queue it
950 * can not hurt to be paranoid and try to wake up requests that may
951 * haven been blocked when more than 50 at time were on the wire to the
952 * same server - they now will see the session is in exit state and get
953 * out of SendReceive.
955 wake_up_all(&server
->request_q
);
956 /* give those requests time to exit */
958 if (cifs_rdma_enabled(server
))
959 smbd_destroy(server
);
960 if (server
->ssocket
) {
961 sock_release(server
->ssocket
);
962 server
->ssocket
= NULL
;
965 if (!list_empty(&server
->pending_mid_q
)) {
966 struct list_head dispose_list
;
967 struct mid_q_entry
*mid_entry
;
968 struct list_head
*tmp
, *tmp2
;
970 INIT_LIST_HEAD(&dispose_list
);
971 spin_lock(&GlobalMid_Lock
);
972 list_for_each_safe(tmp
, tmp2
, &server
->pending_mid_q
) {
973 mid_entry
= list_entry(tmp
, struct mid_q_entry
, qhead
);
974 cifs_dbg(FYI
, "Clearing mid 0x%llx\n", mid_entry
->mid
);
975 kref_get(&mid_entry
->refcount
);
976 mid_entry
->mid_state
= MID_SHUTDOWN
;
977 list_move(&mid_entry
->qhead
, &dispose_list
);
978 mid_entry
->mid_flags
|= MID_DELETED
;
980 spin_unlock(&GlobalMid_Lock
);
982 /* now walk dispose list and issue callbacks */
983 list_for_each_safe(tmp
, tmp2
, &dispose_list
) {
984 mid_entry
= list_entry(tmp
, struct mid_q_entry
, qhead
);
985 cifs_dbg(FYI
, "Callback mid 0x%llx\n", mid_entry
->mid
);
986 list_del_init(&mid_entry
->qhead
);
987 mid_entry
->callback(mid_entry
);
988 cifs_mid_q_entry_release(mid_entry
);
990 /* 1/8th of sec is more than enough time for them to exit */
994 if (!list_empty(&server
->pending_mid_q
)) {
996 * mpx threads have not exited yet give them at least the smb
997 * send timeout time for long ops.
999 * Due to delays on oplock break requests, we need to wait at
1000 * least 45 seconds before giving up on a request getting a
1001 * response and going ahead and killing cifsd.
1003 cifs_dbg(FYI
, "Wait for exit from demultiplex thread\n");
1006 * If threads still have not exited they are probably never
1007 * coming home not much else we can do but free the memory.
1011 kfree(server
->hostname
);
1014 length
= atomic_dec_return(&tcpSesAllocCount
);
1016 mempool_resize(cifs_req_poolp
, length
+ cifs_min_rcv
);
1020 standard_receive3(struct TCP_Server_Info
*server
, struct mid_q_entry
*mid
)
1023 char *buf
= server
->smallbuf
;
1024 unsigned int pdu_length
= server
->pdu_size
;
1026 /* make sure this will fit in a large buffer */
1027 if (pdu_length
> CIFSMaxBufSize
+ MAX_HEADER_SIZE(server
) -
1028 server
->vals
->header_preamble_size
) {
1029 cifs_server_dbg(VFS
, "SMB response too long (%u bytes)\n", pdu_length
);
1030 cifs_reconnect(server
);
1031 return -ECONNABORTED
;
1034 /* switch to large buffer if too big for a small one */
1035 if (pdu_length
> MAX_CIFS_SMALL_BUFFER_SIZE
- 4) {
1036 server
->large_buf
= true;
1037 memcpy(server
->bigbuf
, buf
, server
->total_read
);
1038 buf
= server
->bigbuf
;
1041 /* now read the rest */
1042 length
= cifs_read_from_socket(server
, buf
+ HEADER_SIZE(server
) - 1,
1043 pdu_length
- HEADER_SIZE(server
) + 1
1044 + server
->vals
->header_preamble_size
);
1048 server
->total_read
+= length
;
1050 dump_smb(buf
, server
->total_read
);
1052 return cifs_handle_standard(server
, mid
);
1056 cifs_handle_standard(struct TCP_Server_Info
*server
, struct mid_q_entry
*mid
)
1058 char *buf
= server
->large_buf
? server
->bigbuf
: server
->smallbuf
;
1062 * We know that we received enough to get to the MID as we
1063 * checked the pdu_length earlier. Now check to see
1064 * if the rest of the header is OK. We borrow the length
1065 * var for the rest of the loop to avoid a new stack var.
1067 * 48 bytes is enough to display the header and a little bit
1068 * into the payload for debugging purposes.
1070 length
= server
->ops
->check_message(buf
, server
->total_read
, server
);
1072 cifs_dump_mem("Bad SMB: ", buf
,
1073 min_t(unsigned int, server
->total_read
, 48));
1075 if (server
->ops
->is_session_expired
&&
1076 server
->ops
->is_session_expired(buf
)) {
1077 cifs_reconnect(server
);
1081 if (server
->ops
->is_status_pending
&&
1082 server
->ops
->is_status_pending(buf
, server
))
1088 handle_mid(mid
, server
, buf
, length
);
1093 smb2_add_credits_from_hdr(char *buffer
, struct TCP_Server_Info
*server
)
1095 struct smb2_sync_hdr
*shdr
= (struct smb2_sync_hdr
*)buffer
;
1098 * SMB1 does not use credits.
1100 if (server
->vals
->header_preamble_size
)
1103 if (shdr
->CreditRequest
) {
1104 spin_lock(&server
->req_lock
);
1105 server
->credits
+= le16_to_cpu(shdr
->CreditRequest
);
1106 spin_unlock(&server
->req_lock
);
1107 wake_up(&server
->request_q
);
1113 cifs_demultiplex_thread(void *p
)
1115 int i
, num_mids
, length
;
1116 struct TCP_Server_Info
*server
= p
;
1117 unsigned int pdu_length
;
1118 unsigned int next_offset
;
1120 struct task_struct
*task_to_wake
= NULL
;
1121 struct mid_q_entry
*mids
[MAX_COMPOUND
];
1122 char *bufs
[MAX_COMPOUND
];
1123 unsigned int noreclaim_flag
, num_io_timeout
= 0;
1125 noreclaim_flag
= memalloc_noreclaim_save();
1126 cifs_dbg(FYI
, "Demultiplex PID: %d\n", task_pid_nr(current
));
1128 length
= atomic_inc_return(&tcpSesAllocCount
);
1130 mempool_resize(cifs_req_poolp
, length
+ cifs_min_rcv
);
1133 allow_kernel_signal(SIGKILL
);
1134 while (server
->tcpStatus
!= CifsExiting
) {
1135 if (try_to_freeze())
1138 if (!allocate_buffers(server
))
1141 server
->large_buf
= false;
1142 buf
= server
->smallbuf
;
1143 pdu_length
= 4; /* enough to get RFC1001 header */
1145 length
= cifs_read_from_socket(server
, buf
, pdu_length
);
1149 if (server
->vals
->header_preamble_size
== 0)
1150 server
->total_read
= 0;
1152 server
->total_read
= length
;
1155 * The right amount was read from socket - 4 bytes,
1156 * so we can now interpret the length field.
1158 pdu_length
= get_rfc1002_length(buf
);
1160 cifs_dbg(FYI
, "RFC1002 header 0x%x\n", pdu_length
);
1161 if (!is_smb_response(server
, buf
[0]))
1164 server
->pdu_size
= pdu_length
;
1166 /* make sure we have enough to get to the MID */
1167 if (server
->pdu_size
< HEADER_SIZE(server
) - 1 -
1168 server
->vals
->header_preamble_size
) {
1169 cifs_server_dbg(VFS
, "SMB response too short (%u bytes)\n",
1171 cifs_reconnect(server
);
1175 /* read down to the MID */
1176 length
= cifs_read_from_socket(server
,
1177 buf
+ server
->vals
->header_preamble_size
,
1178 HEADER_SIZE(server
) - 1
1179 - server
->vals
->header_preamble_size
);
1182 server
->total_read
+= length
;
1184 if (server
->ops
->next_header
) {
1185 next_offset
= server
->ops
->next_header(buf
);
1187 server
->pdu_size
= next_offset
;
1190 memset(mids
, 0, sizeof(mids
));
1191 memset(bufs
, 0, sizeof(bufs
));
1194 if (server
->ops
->is_transform_hdr
&&
1195 server
->ops
->receive_transform
&&
1196 server
->ops
->is_transform_hdr(buf
)) {
1197 length
= server
->ops
->receive_transform(server
,
1202 mids
[0] = server
->ops
->find_mid(server
, buf
);
1206 if (!mids
[0] || !mids
[0]->receive
)
1207 length
= standard_receive3(server
, mids
[0]);
1209 length
= mids
[0]->receive(server
, mids
[0]);
1213 for (i
= 0; i
< num_mids
; i
++)
1215 cifs_mid_q_entry_release(mids
[i
]);
1219 if (server
->ops
->is_status_io_timeout
&&
1220 server
->ops
->is_status_io_timeout(buf
)) {
1222 if (num_io_timeout
> NUM_STATUS_IO_TIMEOUT
) {
1223 cifs_reconnect(server
);
1229 server
->lstrp
= jiffies
;
1231 for (i
= 0; i
< num_mids
; i
++) {
1232 if (mids
[i
] != NULL
) {
1233 mids
[i
]->resp_buf_size
= server
->pdu_size
;
1235 if (!mids
[i
]->multiRsp
|| mids
[i
]->multiEnd
)
1236 mids
[i
]->callback(mids
[i
]);
1238 cifs_mid_q_entry_release(mids
[i
]);
1239 } else if (server
->ops
->is_oplock_break
&&
1240 server
->ops
->is_oplock_break(bufs
[i
],
1242 smb2_add_credits_from_hdr(bufs
[i
], server
);
1243 cifs_dbg(FYI
, "Received oplock break\n");
1245 cifs_server_dbg(VFS
, "No task to wake, unknown frame received! NumMids %d\n",
1246 atomic_read(&midCount
));
1247 cifs_dump_mem("Received Data is: ", bufs
[i
],
1248 HEADER_SIZE(server
));
1249 smb2_add_credits_from_hdr(bufs
[i
], server
);
1250 #ifdef CONFIG_CIFS_DEBUG2
1251 if (server
->ops
->dump_detail
)
1252 server
->ops
->dump_detail(bufs
[i
],
1254 cifs_dump_mids(server
);
1255 #endif /* CIFS_DEBUG2 */
1259 if (pdu_length
> server
->pdu_size
) {
1260 if (!allocate_buffers(server
))
1262 pdu_length
-= server
->pdu_size
;
1263 server
->total_read
= 0;
1264 server
->large_buf
= false;
1265 buf
= server
->smallbuf
;
1268 } /* end while !EXITING */
1270 /* buffer usually freed in free_mid - need to free it here on exit */
1271 cifs_buf_release(server
->bigbuf
);
1272 if (server
->smallbuf
) /* no sense logging a debug message if NULL */
1273 cifs_small_buf_release(server
->smallbuf
);
1275 task_to_wake
= xchg(&server
->tsk
, NULL
);
1276 clean_demultiplex_info(server
);
1278 /* if server->tsk was NULL then wait for a signal before exiting */
1279 if (!task_to_wake
) {
1280 set_current_state(TASK_INTERRUPTIBLE
);
1281 while (!signal_pending(current
)) {
1283 set_current_state(TASK_INTERRUPTIBLE
);
1285 set_current_state(TASK_RUNNING
);
1288 memalloc_noreclaim_restore(noreclaim_flag
);
1289 module_put_and_exit(0);
1292 /* extract the host portion of the UNC string */
1294 extract_hostname(const char *unc
)
1300 /* skip double chars at beginning of string */
1301 /* BB: check validity of these bytes? */
1302 if (strlen(unc
) < 3)
1303 return ERR_PTR(-EINVAL
);
1304 for (src
= unc
; *src
&& *src
== '\\'; src
++)
1307 return ERR_PTR(-EINVAL
);
1309 /* delimiter between hostname and sharename is always '\\' now */
1310 delim
= strchr(src
, '\\');
1312 return ERR_PTR(-EINVAL
);
1315 dst
= kmalloc((len
+ 1), GFP_KERNEL
);
1317 return ERR_PTR(-ENOMEM
);
1319 memcpy(dst
, src
, len
);
1325 static int get_option_ul(substring_t args
[], unsigned long *option
)
1330 string
= match_strdup(args
);
1333 rc
= kstrtoul(string
, 0, option
);
1339 static int get_option_uid(substring_t args
[], kuid_t
*result
)
1341 unsigned long value
;
1345 rc
= get_option_ul(args
, &value
);
1349 uid
= make_kuid(current_user_ns(), value
);
1350 if (!uid_valid(uid
))
1357 static int get_option_gid(substring_t args
[], kgid_t
*result
)
1359 unsigned long value
;
1363 rc
= get_option_ul(args
, &value
);
1367 gid
= make_kgid(current_user_ns(), value
);
1368 if (!gid_valid(gid
))
1375 static int cifs_parse_security_flavors(char *value
,
1376 struct smb_vol
*vol
)
1379 substring_t args
[MAX_OPT_ARGS
];
1382 * With mount options, the last one should win. Reset any existing
1383 * settings back to default.
1385 vol
->sectype
= Unspecified
;
1388 switch (match_token(value
, cifs_secflavor_tokens
, args
)) {
1390 cifs_dbg(VFS
, "sec=krb5p is not supported!\n");
1396 vol
->sectype
= Kerberos
;
1398 case Opt_sec_ntlmsspi
:
1401 case Opt_sec_ntlmssp
:
1402 vol
->sectype
= RawNTLMSSP
;
1408 vol
->sectype
= NTLM
;
1410 case Opt_sec_ntlmv2i
:
1413 case Opt_sec_ntlmv2
:
1414 vol
->sectype
= NTLMv2
;
1416 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1417 case Opt_sec_lanman
:
1418 vol
->sectype
= LANMAN
;
1425 cifs_dbg(VFS
, "bad security option: %s\n", value
);
1433 cifs_parse_cache_flavor(char *value
, struct smb_vol
*vol
)
1435 substring_t args
[MAX_OPT_ARGS
];
1437 switch (match_token(value
, cifs_cacheflavor_tokens
, args
)) {
1438 case Opt_cache_loose
:
1439 vol
->direct_io
= false;
1440 vol
->strict_io
= false;
1441 vol
->cache_ro
= false;
1442 vol
->cache_rw
= false;
1444 case Opt_cache_strict
:
1445 vol
->direct_io
= false;
1446 vol
->strict_io
= true;
1447 vol
->cache_ro
= false;
1448 vol
->cache_rw
= false;
1450 case Opt_cache_none
:
1451 vol
->direct_io
= true;
1452 vol
->strict_io
= false;
1453 vol
->cache_ro
= false;
1454 vol
->cache_rw
= false;
1457 vol
->direct_io
= false;
1458 vol
->strict_io
= false;
1459 vol
->cache_ro
= true;
1460 vol
->cache_rw
= false;
1463 vol
->direct_io
= false;
1464 vol
->strict_io
= false;
1465 vol
->cache_ro
= false;
1466 vol
->cache_rw
= true;
1469 cifs_dbg(VFS
, "bad cache= option: %s\n", value
);
1476 cifs_parse_smb_version(char *value
, struct smb_vol
*vol
, bool is_smb3
)
1478 substring_t args
[MAX_OPT_ARGS
];
1480 switch (match_token(value
, cifs_smb_version_tokens
, args
)) {
1481 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
1483 if (disable_legacy_dialects
) {
1484 cifs_dbg(VFS
, "mount with legacy dialect disabled\n");
1488 cifs_dbg(VFS
, "vers=1.0 (cifs) not permitted when mounting with smb3\n");
1491 cifs_dbg(VFS
, "Use of the less secure dialect vers=1.0 is not recommended unless required for access to very old servers\n");
1492 vol
->ops
= &smb1_operations
;
1493 vol
->vals
= &smb1_values
;
1496 if (disable_legacy_dialects
) {
1497 cifs_dbg(VFS
, "mount with legacy dialect disabled\n");
1501 cifs_dbg(VFS
, "vers=2.0 not permitted when mounting with smb3\n");
1504 vol
->ops
= &smb20_operations
;
1505 vol
->vals
= &smb20_values
;
1509 cifs_dbg(VFS
, "vers=1.0 (cifs) mount not permitted when legacy dialects disabled\n");
1512 cifs_dbg(VFS
, "vers=2.0 mount not permitted when legacy dialects disabled\n");
1514 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
1516 vol
->ops
= &smb21_operations
;
1517 vol
->vals
= &smb21_values
;
1520 vol
->ops
= &smb30_operations
;
1521 vol
->vals
= &smb30_values
;
1524 vol
->ops
= &smb30_operations
; /* currently identical with 3.0 */
1525 vol
->vals
= &smb302_values
;
1528 vol
->ops
= &smb311_operations
;
1529 vol
->vals
= &smb311_values
;
1532 vol
->ops
= &smb30_operations
; /* currently identical with 3.0 */
1533 vol
->vals
= &smb3any_values
;
1536 vol
->ops
= &smb30_operations
; /* currently identical with 3.0 */
1537 vol
->vals
= &smbdefault_values
;
1540 cifs_dbg(VFS
, "Unknown vers= option specified: %s\n", value
);
1547 * Parse a devname into substrings and populate the vol->UNC and vol->prepath
1548 * fields with the result. Returns 0 on success and an error otherwise.
1551 cifs_parse_devname(const char *devname
, struct smb_vol
*vol
)
1554 const char *delims
= "/\\";
1557 if (unlikely(!devname
|| !*devname
)) {
1558 cifs_dbg(VFS
, "Device name not specified\n");
1562 /* make sure we have a valid UNC double delimiter prefix */
1563 len
= strspn(devname
, delims
);
1567 /* find delimiter between host and sharename */
1568 pos
= strpbrk(devname
+ 2, delims
);
1572 /* skip past delimiter */
1575 /* now go until next delimiter or end of string */
1576 len
= strcspn(pos
, delims
);
1578 /* move "pos" up to delimiter or NULL */
1580 vol
->UNC
= kstrndup(devname
, pos
- devname
, GFP_KERNEL
);
1584 convert_delimiter(vol
->UNC
, '\\');
1586 /* skip any delimiter */
1587 if (*pos
== '/' || *pos
== '\\')
1590 /* If pos is NULL then no prepath */
1594 vol
->prepath
= kstrdup(pos
, GFP_KERNEL
);
1602 cifs_parse_mount_options(const char *mountdata
, const char *devname
,
1603 struct smb_vol
*vol
, bool is_smb3
)
1606 char *mountdata_copy
= NULL
, *options
;
1607 unsigned int temp_len
, i
, j
;
1609 short int override_uid
= -1;
1610 short int override_gid
= -1;
1611 bool uid_specified
= false;
1612 bool gid_specified
= false;
1613 bool sloppy
= false;
1614 char *invalid
= NULL
;
1615 char *nodename
= utsname()->nodename
;
1616 char *string
= NULL
;
1617 char *tmp_end
, *value
;
1619 bool got_ip
= false;
1620 bool got_version
= false;
1621 unsigned short port
= 0;
1622 struct sockaddr
*dstaddr
= (struct sockaddr
*)&vol
->dstaddr
;
1626 delim
= separator
[0];
1628 /* ensure we always start with zeroed-out smb_vol */
1629 memset(vol
, 0, sizeof(*vol
));
1632 * does not have to be perfect mapping since field is
1633 * informational, only used for servers that do not support
1634 * port 445 and it can be overridden at mount time
1636 memset(vol
->source_rfc1001_name
, 0x20, RFC1001_NAME_LEN
);
1637 for (i
= 0; i
< strnlen(nodename
, RFC1001_NAME_LEN
); i
++)
1638 vol
->source_rfc1001_name
[i
] = toupper(nodename
[i
]);
1640 vol
->source_rfc1001_name
[RFC1001_NAME_LEN
] = 0;
1641 /* null target name indicates to use *SMBSERVR default called name
1642 if we end up sending RFC1001 session initialize */
1643 vol
->target_rfc1001_name
[0] = 0;
1644 vol
->cred_uid
= current_uid();
1645 vol
->linux_uid
= current_uid();
1646 vol
->linux_gid
= current_gid();
1647 vol
->bsize
= 1024 * 1024; /* can improve cp performance significantly */
1649 * default to SFM style remapping of seven reserved characters
1650 * unless user overrides it or we negotiate CIFS POSIX where
1651 * it is unnecessary. Can not simultaneously use more than one mapping
1652 * since then readdir could list files that open could not open
1656 /* default to only allowing write access to owner of the mount */
1657 vol
->dir_mode
= vol
->file_mode
= S_IRUGO
| S_IXUGO
| S_IWUSR
;
1659 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
1660 /* default is always to request posix paths. */
1661 vol
->posix_paths
= 1;
1662 /* default to using server inode numbers where available */
1663 vol
->server_ino
= 1;
1665 /* default is to use strict cifs caching semantics */
1666 vol
->strict_io
= true;
1668 vol
->actimeo
= CIFS_DEF_ACTIMEO
;
1670 /* Most clients set timeout to 0, allows server to use its default */
1671 vol
->handle_timeout
= 0; /* See MS-SMB2 spec section 2.2.14.2.12 */
1673 /* offer SMB2.1 and later (SMB3 etc). Secure and widely accepted */
1674 vol
->ops
= &smb30_operations
;
1675 vol
->vals
= &smbdefault_values
;
1677 vol
->echo_interval
= SMB_ECHO_INTERVAL_DEFAULT
;
1679 /* default to no multichannel (single server connection) */
1680 vol
->multichannel
= false;
1681 vol
->max_channels
= 1;
1684 goto cifs_parse_mount_err
;
1686 mountdata_copy
= kstrndup(mountdata
, PAGE_SIZE
, GFP_KERNEL
);
1687 if (!mountdata_copy
)
1688 goto cifs_parse_mount_err
;
1690 options
= mountdata_copy
;
1691 end
= options
+ strlen(options
);
1693 if (strncmp(options
, "sep=", 4) == 0) {
1694 if (options
[4] != 0) {
1695 separator
[0] = options
[4];
1698 cifs_dbg(FYI
, "Null separator not allowed\n");
1701 vol
->backupuid_specified
= false; /* no backup intent for a user */
1702 vol
->backupgid_specified
= false; /* no backup intent for a group */
1704 switch (cifs_parse_devname(devname
, vol
)) {
1708 cifs_dbg(VFS
, "Unable to allocate memory for devname\n");
1709 goto cifs_parse_mount_err
;
1711 cifs_dbg(VFS
, "Malformed UNC in devname\n");
1712 goto cifs_parse_mount_err
;
1714 cifs_dbg(VFS
, "Unknown error parsing devname\n");
1715 goto cifs_parse_mount_err
;
1718 while ((data
= strsep(&options
, separator
)) != NULL
) {
1719 substring_t args
[MAX_OPT_ARGS
];
1720 unsigned long option
;
1726 token
= match_token(data
, cifs_mount_option_tokens
, args
);
1730 /* Ingnore the following */
1734 /* Boolean values */
1735 case Opt_user_xattr
:
1738 case Opt_nouser_xattr
:
1744 case Opt_noforceuid
:
1750 case Opt_noforcegid
:
1753 case Opt_noblocksend
:
1754 vol
->noblocksnd
= 1;
1756 case Opt_noautotune
:
1757 vol
->noautotune
= 1;
1778 vol
->sfu_remap
= true;
1779 vol
->remap
= false; /* disable SFM mapping */
1781 case Opt_nomapchars
:
1782 vol
->sfu_remap
= false;
1786 vol
->sfu_remap
= false; /* disable SFU mapping */
1788 case Opt_nomapposix
:
1801 #ifdef CONFIG_CIFS_ROOT
1805 case Opt_posixpaths
:
1806 vol
->posix_paths
= 1;
1808 case Opt_noposixpaths
:
1809 vol
->posix_paths
= 0;
1814 "conflicting unix mount options\n");
1815 vol
->no_linux_ext
= 1;
1818 if (vol
->no_linux_ext
)
1820 "conflicting unix mount options\n");
1832 * turn off mandatory locking in mode
1833 * if remote locking is turned off since the
1834 * local vfs will do advisory
1836 if (vol
->file_mode
==
1837 (S_IALLUGO
& ~(S_ISUID
| S_IXGRP
)))
1838 vol
->file_mode
= S_IALLUGO
;
1840 case Opt_nohandlecache
:
1841 vol
->nohandlecache
= 1;
1843 case Opt_handlecache
:
1844 vol
->nohandlecache
= 0;
1846 case Opt_forcemandatorylock
:
1855 case Opt_setuidfromacl
:
1856 vol
->setuidfromacl
= 1;
1859 vol
->dynperm
= true;
1862 vol
->dynperm
= false;
1876 case Opt_nostrictsync
:
1877 vol
->nostrictsync
= 1;
1879 case Opt_strictsync
:
1880 vol
->nostrictsync
= 0;
1883 vol
->server_ino
= 1;
1885 case Opt_noserverino
:
1886 vol
->server_ino
= 0;
1888 case Opt_rwpidforward
:
1889 vol
->rwpidforward
= 1;
1901 vol
->no_psx_acl
= 0;
1904 vol
->no_psx_acl
= 1;
1906 case Opt_locallease
:
1907 vol
->local_lease
= 1;
1912 case Opt_ignore_signature
:
1914 vol
->ignore_signature
= true;
1917 /* we do not do the following in secFlags because seal
1918 * is a per tree connection (mount) not a per socket
1919 * or per-smb connection option in the protocol
1920 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1925 pr_warn("Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n");
1928 #ifndef CONFIG_CIFS_FSCACHE
1929 cifs_dbg(VFS
, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n");
1930 goto cifs_parse_mount_err
;
1934 case Opt_mfsymlinks
:
1935 vol
->mfsymlinks
= true;
1938 vol
->multiuser
= true;
1943 case Opt_nosharesock
:
1944 vol
->nosharesock
= true;
1946 case Opt_nopersistent
:
1947 vol
->nopersistent
= true;
1948 if (vol
->persistent
) {
1950 "persistenthandles mount options conflict\n");
1951 goto cifs_parse_mount_err
;
1954 case Opt_persistent
:
1955 vol
->persistent
= true;
1956 if ((vol
->nopersistent
) || (vol
->resilient
)) {
1958 "persistenthandles mount options conflict\n");
1959 goto cifs_parse_mount_err
;
1963 vol
->resilient
= true;
1964 if (vol
->persistent
) {
1966 "persistenthandles mount options conflict\n");
1967 goto cifs_parse_mount_err
;
1970 case Opt_noresilient
:
1971 vol
->resilient
= false; /* already the default */
1973 case Opt_domainauto
:
1974 vol
->domainauto
= true;
1979 case Opt_multichannel
:
1980 vol
->multichannel
= true;
1981 /* if number of channels not specified, default to 2 */
1982 if (vol
->max_channels
< 2)
1983 vol
->max_channels
= 2;
1985 case Opt_nomultichannel
:
1986 vol
->multichannel
= false;
1987 vol
->max_channels
= 1;
1990 vol
->compression
= UNKNOWN_TYPE
;
1992 "SMB3 compression support is experimental\n");
1995 /* Numeric Values */
1997 if (get_option_uid(args
, &vol
->backupuid
)) {
1998 cifs_dbg(VFS
, "%s: Invalid backupuid value\n",
2000 goto cifs_parse_mount_err
;
2002 vol
->backupuid_specified
= true;
2005 if (get_option_gid(args
, &vol
->backupgid
)) {
2006 cifs_dbg(VFS
, "%s: Invalid backupgid value\n",
2008 goto cifs_parse_mount_err
;
2010 vol
->backupgid_specified
= true;
2013 if (get_option_uid(args
, &vol
->linux_uid
)) {
2014 cifs_dbg(VFS
, "%s: Invalid uid value\n",
2016 goto cifs_parse_mount_err
;
2018 uid_specified
= true;
2021 if (get_option_uid(args
, &vol
->cred_uid
)) {
2022 cifs_dbg(VFS
, "%s: Invalid cruid value\n",
2024 goto cifs_parse_mount_err
;
2028 if (get_option_gid(args
, &vol
->linux_gid
)) {
2029 cifs_dbg(VFS
, "%s: Invalid gid value\n",
2031 goto cifs_parse_mount_err
;
2033 gid_specified
= true;
2036 if (get_option_ul(args
, &option
)) {
2037 cifs_dbg(VFS
, "%s: Invalid file_mode value\n",
2039 goto cifs_parse_mount_err
;
2041 vol
->file_mode
= option
;
2044 if (get_option_ul(args
, &option
)) {
2045 cifs_dbg(VFS
, "%s: Invalid dir_mode value\n",
2047 goto cifs_parse_mount_err
;
2049 vol
->dir_mode
= option
;
2052 if (get_option_ul(args
, &option
) ||
2053 option
> USHRT_MAX
) {
2054 cifs_dbg(VFS
, "%s: Invalid port value\n",
2056 goto cifs_parse_mount_err
;
2058 port
= (unsigned short)option
;
2060 case Opt_min_enc_offload
:
2061 if (get_option_ul(args
, &option
)) {
2062 cifs_dbg(VFS
, "Invalid minimum encrypted read offload size (esize)\n");
2063 goto cifs_parse_mount_err
;
2065 vol
->min_offload
= option
;
2068 if (get_option_ul(args
, &option
)) {
2069 cifs_dbg(VFS
, "%s: Invalid blocksize value\n",
2071 goto cifs_parse_mount_err
;
2074 * inode blocksize realistically should never need to be
2075 * less than 16K or greater than 16M and default is 1MB.
2076 * Note that small inode block sizes (e.g. 64K) can lead
2077 * to very poor performance of common tools like cp and scp
2079 if ((option
< CIFS_MAX_MSGSIZE
) ||
2080 (option
> (4 * SMB3_DEFAULT_IOSIZE
))) {
2081 cifs_dbg(VFS
, "%s: Invalid blocksize\n",
2083 goto cifs_parse_mount_err
;
2085 vol
->bsize
= option
;
2088 if (get_option_ul(args
, &option
)) {
2089 cifs_dbg(VFS
, "%s: Invalid rsize value\n",
2091 goto cifs_parse_mount_err
;
2093 vol
->rsize
= option
;
2096 if (get_option_ul(args
, &option
)) {
2097 cifs_dbg(VFS
, "%s: Invalid wsize value\n",
2099 goto cifs_parse_mount_err
;
2101 vol
->wsize
= option
;
2104 if (get_option_ul(args
, &option
)) {
2105 cifs_dbg(VFS
, "%s: Invalid actimeo value\n",
2107 goto cifs_parse_mount_err
;
2109 vol
->actimeo
= HZ
* option
;
2110 if (vol
->actimeo
> CIFS_MAX_ACTIMEO
) {
2111 cifs_dbg(VFS
, "attribute cache timeout too large\n");
2112 goto cifs_parse_mount_err
;
2115 case Opt_handletimeout
:
2116 if (get_option_ul(args
, &option
)) {
2117 cifs_dbg(VFS
, "%s: Invalid handletimeout value\n",
2119 goto cifs_parse_mount_err
;
2121 vol
->handle_timeout
= option
;
2122 if (vol
->handle_timeout
> SMB3_MAX_HANDLE_TIMEOUT
) {
2123 cifs_dbg(VFS
, "Invalid handle cache timeout, longer than 16 minutes\n");
2124 goto cifs_parse_mount_err
;
2127 case Opt_echo_interval
:
2128 if (get_option_ul(args
, &option
)) {
2129 cifs_dbg(VFS
, "%s: Invalid echo interval value\n",
2131 goto cifs_parse_mount_err
;
2133 vol
->echo_interval
= option
;
2136 if (get_option_ul(args
, &option
)) {
2137 cifs_dbg(VFS
, "%s: Invalid snapshot time\n",
2139 goto cifs_parse_mount_err
;
2141 vol
->snapshot_time
= option
;
2143 case Opt_max_credits
:
2144 if (get_option_ul(args
, &option
) || (option
< 20) ||
2146 cifs_dbg(VFS
, "%s: Invalid max_credits value\n",
2148 goto cifs_parse_mount_err
;
2150 vol
->max_credits
= option
;
2152 case Opt_max_channels
:
2153 if (get_option_ul(args
, &option
) || option
< 1 ||
2154 option
> CIFS_MAX_CHANNELS
) {
2155 cifs_dbg(VFS
, "%s: Invalid max_channels value, needs to be 1-%d\n",
2156 __func__
, CIFS_MAX_CHANNELS
);
2157 goto cifs_parse_mount_err
;
2159 vol
->max_channels
= option
;
2162 /* String Arguments */
2164 case Opt_blank_user
:
2165 /* null user, ie. anonymous authentication */
2167 vol
->username
= NULL
;
2170 string
= match_strdup(args
);
2174 if (strnlen(string
, CIFS_MAX_USERNAME_LEN
) >
2175 CIFS_MAX_USERNAME_LEN
) {
2176 pr_warn("username too long\n");
2177 goto cifs_parse_mount_err
;
2180 kfree(vol
->username
);
2181 vol
->username
= kstrdup(string
, GFP_KERNEL
);
2183 goto cifs_parse_mount_err
;
2185 case Opt_blank_pass
:
2186 /* passwords have to be handled differently
2187 * to allow the character used for deliminator
2188 * to be passed within them
2192 * Check if this is a case where the password
2193 * starts with a delimiter
2195 tmp_end
= strchr(data
, '=');
2197 if (!(tmp_end
< end
&& tmp_end
[1] == delim
)) {
2198 /* No it is not. Set the password to NULL */
2199 kfree_sensitive(vol
->password
);
2200 vol
->password
= NULL
;
2203 fallthrough
; /* to Opt_pass below */
2205 /* Obtain the value string */
2206 value
= strchr(data
, '=');
2209 /* Set tmp_end to end of the string */
2210 tmp_end
= (char *) value
+ strlen(value
);
2212 /* Check if following character is the deliminator
2213 * If yes, we have encountered a double deliminator
2214 * reset the NULL character to the deliminator
2216 if (tmp_end
< end
&& tmp_end
[1] == delim
) {
2219 /* Keep iterating until we get to a single
2220 * deliminator OR the end
2222 while ((tmp_end
= strchr(tmp_end
, delim
))
2223 != NULL
&& (tmp_end
[1] == delim
)) {
2224 tmp_end
= (char *) &tmp_end
[2];
2227 /* Reset var options to point to next element */
2230 options
= (char *) &tmp_end
[1];
2232 /* Reached the end of the mount option
2237 kfree_sensitive(vol
->password
);
2238 /* Now build new password string */
2239 temp_len
= strlen(value
);
2240 vol
->password
= kzalloc(temp_len
+1, GFP_KERNEL
);
2241 if (vol
->password
== NULL
) {
2242 pr_warn("no memory for password\n");
2243 goto cifs_parse_mount_err
;
2246 for (i
= 0, j
= 0; i
< temp_len
; i
++, j
++) {
2247 vol
->password
[j
] = value
[i
];
2248 if ((value
[i
] == delim
) &&
2249 value
[i
+1] == delim
)
2250 /* skip the second deliminator */
2253 vol
->password
[j
] = '\0';
2256 /* FIXME: should this be an error instead? */
2260 string
= match_strdup(args
);
2264 if (!cifs_convert_address(dstaddr
, string
,
2266 pr_err("bad ip= option (%s)\n", string
);
2267 goto cifs_parse_mount_err
;
2272 string
= match_strdup(args
);
2276 if (strnlen(string
, CIFS_MAX_DOMAINNAME_LEN
)
2277 == CIFS_MAX_DOMAINNAME_LEN
) {
2278 pr_warn("domain name too long\n");
2279 goto cifs_parse_mount_err
;
2282 kfree(vol
->domainname
);
2283 vol
->domainname
= kstrdup(string
, GFP_KERNEL
);
2284 if (!vol
->domainname
) {
2285 pr_warn("no memory for domainname\n");
2286 goto cifs_parse_mount_err
;
2288 cifs_dbg(FYI
, "Domain name set\n");
2291 string
= match_strdup(args
);
2295 if (!cifs_convert_address(
2296 (struct sockaddr
*)&vol
->srcaddr
,
2297 string
, strlen(string
))) {
2298 pr_warn("Could not parse srcaddr: %s\n",
2300 goto cifs_parse_mount_err
;
2304 string
= match_strdup(args
);
2308 if (strnlen(string
, 1024) >= 65) {
2309 pr_warn("iocharset name too long\n");
2310 goto cifs_parse_mount_err
;
2313 if (strncasecmp(string
, "default", 7) != 0) {
2314 kfree(vol
->iocharset
);
2315 vol
->iocharset
= kstrdup(string
,
2317 if (!vol
->iocharset
) {
2318 pr_warn("no memory for charset\n");
2319 goto cifs_parse_mount_err
;
2322 /* if iocharset not set then load_nls_default
2325 cifs_dbg(FYI
, "iocharset set to %s\n", string
);
2327 case Opt_netbiosname
:
2328 string
= match_strdup(args
);
2332 memset(vol
->source_rfc1001_name
, 0x20,
2335 * FIXME: are there cases in which a comma can
2336 * be valid in workstation netbios name (and
2337 * need special handling)?
2339 for (i
= 0; i
< RFC1001_NAME_LEN
; i
++) {
2340 /* don't ucase netbiosname for user */
2343 vol
->source_rfc1001_name
[i
] = string
[i
];
2345 /* The string has 16th byte zero still from
2346 * set at top of the function
2348 if (i
== RFC1001_NAME_LEN
&& string
[i
] != 0)
2349 pr_warn("netbiosname longer than 15 truncated\n");
2352 /* servernetbiosname specified override *SMBSERVER */
2353 string
= match_strdup(args
);
2357 /* last byte, type, is 0x20 for servr type */
2358 memset(vol
->target_rfc1001_name
, 0x20,
2359 RFC1001_NAME_LEN_WITH_NULL
);
2361 /* BB are there cases in which a comma can be
2362 valid in this workstation netbios name
2363 (and need special handling)? */
2365 /* user or mount helper must uppercase the
2367 for (i
= 0; i
< 15; i
++) {
2370 vol
->target_rfc1001_name
[i
] = string
[i
];
2372 /* The string has 16th byte zero still from
2373 set at top of the function */
2374 if (i
== RFC1001_NAME_LEN
&& string
[i
] != 0)
2375 pr_warn("server netbiosname longer than 15 truncated\n");
2378 /* version of mount userspace tools, not dialect */
2379 string
= match_strdup(args
);
2383 /* If interface changes in mount.cifs bump to new ver */
2384 if (strncasecmp(string
, "1", 1) == 0) {
2385 if (strlen(string
) > 1) {
2386 pr_warn("Bad mount helper ver=%s. Did you want SMB1 (CIFS) dialect and mean to type vers=1.0 instead?\n",
2388 goto cifs_parse_mount_err
;
2390 /* This is the default */
2393 /* For all other value, error */
2394 pr_warn("Invalid mount helper version specified\n");
2395 goto cifs_parse_mount_err
;
2397 /* protocol version (dialect) */
2398 string
= match_strdup(args
);
2402 if (cifs_parse_smb_version(string
, vol
, is_smb3
) != 0)
2403 goto cifs_parse_mount_err
;
2407 string
= match_strdup(args
);
2411 if (cifs_parse_security_flavors(string
, vol
) != 0)
2412 goto cifs_parse_mount_err
;
2415 string
= match_strdup(args
);
2419 if (cifs_parse_cache_flavor(string
, vol
) != 0)
2420 goto cifs_parse_mount_err
;
2424 * An option we don't recognize. Save it off for later
2425 * if we haven't already found one
2431 /* Free up any allocated string */
2436 if (!sloppy
&& invalid
) {
2437 pr_err("Unknown mount option \"%s\"\n", invalid
);
2438 goto cifs_parse_mount_err
;
2441 if (vol
->rdma
&& vol
->vals
->protocol_id
< SMB30_PROT_ID
) {
2442 cifs_dbg(VFS
, "SMB Direct requires Version >=3.0\n");
2443 goto cifs_parse_mount_err
;
2447 /* Muliuser mounts require CONFIG_KEYS support */
2448 if (vol
->multiuser
) {
2449 cifs_dbg(VFS
, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n");
2450 goto cifs_parse_mount_err
;
2454 cifs_dbg(VFS
, "CIFS mount error: No usable UNC path provided in device string!\n");
2455 goto cifs_parse_mount_err
;
2458 /* make sure UNC has a share name */
2459 if (!strchr(vol
->UNC
+ 3, '\\')) {
2460 cifs_dbg(VFS
, "Malformed UNC. Unable to find share name.\n");
2461 goto cifs_parse_mount_err
;
2468 /* No ip= option specified? Try to get it from UNC */
2469 /* Use the address part of the UNC. */
2470 slash
= strchr(&vol
->UNC
[2], '\\');
2471 len
= slash
- &vol
->UNC
[2];
2472 if (!cifs_convert_address(dstaddr
, &vol
->UNC
[2], len
)) {
2473 pr_err("Unable to determine destination address\n");
2474 goto cifs_parse_mount_err
;
2478 /* set the port that we got earlier */
2479 cifs_set_port(dstaddr
, port
);
2482 vol
->override_uid
= override_uid
;
2483 else if (override_uid
== 1)
2484 pr_notice("ignoring forceuid mount option specified with no uid= option\n");
2487 vol
->override_gid
= override_gid
;
2488 else if (override_gid
== 1)
2489 pr_notice("ignoring forcegid mount option specified with no gid= option\n");
2491 if (got_version
== false)
2492 pr_warn_once("No dialect specified on mount. Default has changed to a more secure dialect, SMB2.1 or later (e.g. SMB3.1.1), from CIFS (SMB1). To use the less secure SMB1 dialect to access old servers which do not support SMB3.1.1 (or even SMB3 or SMB2.1) specify vers=1.0 on mount.\n");
2494 kfree(mountdata_copy
);
2498 pr_warn("Could not allocate temporary buffer\n");
2499 cifs_parse_mount_err
:
2501 kfree(mountdata_copy
);
2505 /** Returns true if srcaddr isn't specified and rhs isn't
2506 * specified, or if srcaddr is specified and
2507 * matches the IP address of the rhs argument.
2510 cifs_match_ipaddr(struct sockaddr
*srcaddr
, struct sockaddr
*rhs
)
2512 switch (srcaddr
->sa_family
) {
2514 return (rhs
->sa_family
== AF_UNSPEC
);
2516 struct sockaddr_in
*saddr4
= (struct sockaddr_in
*)srcaddr
;
2517 struct sockaddr_in
*vaddr4
= (struct sockaddr_in
*)rhs
;
2518 return (saddr4
->sin_addr
.s_addr
== vaddr4
->sin_addr
.s_addr
);
2521 struct sockaddr_in6
*saddr6
= (struct sockaddr_in6
*)srcaddr
;
2522 struct sockaddr_in6
*vaddr6
= (struct sockaddr_in6
*)rhs
;
2523 return ipv6_addr_equal(&saddr6
->sin6_addr
, &vaddr6
->sin6_addr
);
2527 return false; /* don't expect to be here */
2532 * If no port is specified in addr structure, we try to match with 445 port
2533 * and if it fails - with 139 ports. It should be called only if address
2534 * families of server and addr are equal.
2537 match_port(struct TCP_Server_Info
*server
, struct sockaddr
*addr
)
2539 __be16 port
, *sport
;
2541 /* SMBDirect manages its own ports, don't match it here */
2545 switch (addr
->sa_family
) {
2547 sport
= &((struct sockaddr_in
*) &server
->dstaddr
)->sin_port
;
2548 port
= ((struct sockaddr_in
*) addr
)->sin_port
;
2551 sport
= &((struct sockaddr_in6
*) &server
->dstaddr
)->sin6_port
;
2552 port
= ((struct sockaddr_in6
*) addr
)->sin6_port
;
2560 port
= htons(CIFS_PORT
);
2564 port
= htons(RFC1001_PORT
);
2567 return port
== *sport
;
2571 match_address(struct TCP_Server_Info
*server
, struct sockaddr
*addr
,
2572 struct sockaddr
*srcaddr
)
2574 switch (addr
->sa_family
) {
2576 struct sockaddr_in
*addr4
= (struct sockaddr_in
*)addr
;
2577 struct sockaddr_in
*srv_addr4
=
2578 (struct sockaddr_in
*)&server
->dstaddr
;
2580 if (addr4
->sin_addr
.s_addr
!= srv_addr4
->sin_addr
.s_addr
)
2585 struct sockaddr_in6
*addr6
= (struct sockaddr_in6
*)addr
;
2586 struct sockaddr_in6
*srv_addr6
=
2587 (struct sockaddr_in6
*)&server
->dstaddr
;
2589 if (!ipv6_addr_equal(&addr6
->sin6_addr
,
2590 &srv_addr6
->sin6_addr
))
2592 if (addr6
->sin6_scope_id
!= srv_addr6
->sin6_scope_id
)
2598 return false; /* don't expect to be here */
2601 if (!cifs_match_ipaddr(srcaddr
, (struct sockaddr
*)&server
->srcaddr
))
2608 match_security(struct TCP_Server_Info
*server
, struct smb_vol
*vol
)
2611 * The select_sectype function should either return the vol->sectype
2612 * that was specified, or "Unspecified" if that sectype was not
2613 * compatible with the given NEGOTIATE request.
2615 if (server
->ops
->select_sectype(server
, vol
->sectype
)
2620 * Now check if signing mode is acceptable. No need to check
2621 * global_secflags at this point since if MUST_SIGN is set then
2622 * the server->sign had better be too.
2624 if (vol
->sign
&& !server
->sign
)
2630 static int match_server(struct TCP_Server_Info
*server
, struct smb_vol
*vol
)
2632 struct sockaddr
*addr
= (struct sockaddr
*)&vol
->dstaddr
;
2634 if (vol
->nosharesock
)
2637 /* If multidialect negotiation see if existing sessions match one */
2638 if (strcmp(vol
->vals
->version_string
, SMB3ANY_VERSION_STRING
) == 0) {
2639 if (server
->vals
->protocol_id
< SMB30_PROT_ID
)
2641 } else if (strcmp(vol
->vals
->version_string
,
2642 SMBDEFAULT_VERSION_STRING
) == 0) {
2643 if (server
->vals
->protocol_id
< SMB21_PROT_ID
)
2645 } else if ((server
->vals
!= vol
->vals
) || (server
->ops
!= vol
->ops
))
2648 if (!net_eq(cifs_net_ns(server
), current
->nsproxy
->net_ns
))
2651 if (!match_address(server
, addr
,
2652 (struct sockaddr
*)&vol
->srcaddr
))
2655 if (!match_port(server
, addr
))
2658 if (!match_security(server
, vol
))
2661 if (server
->echo_interval
!= vol
->echo_interval
* HZ
)
2664 if (server
->rdma
!= vol
->rdma
)
2667 if (server
->ignore_signature
!= vol
->ignore_signature
)
2670 if (server
->min_offload
!= vol
->min_offload
)
2676 struct TCP_Server_Info
*
2677 cifs_find_tcp_session(struct smb_vol
*vol
)
2679 struct TCP_Server_Info
*server
;
2681 spin_lock(&cifs_tcp_ses_lock
);
2682 list_for_each_entry(server
, &cifs_tcp_ses_list
, tcp_ses_list
) {
2684 * Skip ses channels since they're only handled in lower layers
2685 * (e.g. cifs_send_recv).
2687 if (server
->is_channel
|| !match_server(server
, vol
))
2690 ++server
->srv_count
;
2691 spin_unlock(&cifs_tcp_ses_lock
);
2692 cifs_dbg(FYI
, "Existing tcp session with server found\n");
2695 spin_unlock(&cifs_tcp_ses_lock
);
2700 cifs_put_tcp_session(struct TCP_Server_Info
*server
, int from_reconnect
)
2702 struct task_struct
*task
;
2704 spin_lock(&cifs_tcp_ses_lock
);
2705 if (--server
->srv_count
> 0) {
2706 spin_unlock(&cifs_tcp_ses_lock
);
2710 put_net(cifs_net_ns(server
));
2712 list_del_init(&server
->tcp_ses_list
);
2713 spin_unlock(&cifs_tcp_ses_lock
);
2715 cancel_delayed_work_sync(&server
->echo
);
2719 * Avoid deadlock here: reconnect work calls
2720 * cifs_put_tcp_session() at its end. Need to be sure
2721 * that reconnect work does nothing with server pointer after
2724 cancel_delayed_work(&server
->reconnect
);
2726 cancel_delayed_work_sync(&server
->reconnect
);
2728 spin_lock(&GlobalMid_Lock
);
2729 server
->tcpStatus
= CifsExiting
;
2730 spin_unlock(&GlobalMid_Lock
);
2732 cifs_crypto_secmech_release(server
);
2733 cifs_fscache_release_client_cookie(server
);
2735 kfree(server
->session_key
.response
);
2736 server
->session_key
.response
= NULL
;
2737 server
->session_key
.len
= 0;
2739 task
= xchg(&server
->tsk
, NULL
);
2741 send_sig(SIGKILL
, task
, 1);
2744 struct TCP_Server_Info
*
2745 cifs_get_tcp_session(struct smb_vol
*volume_info
)
2747 struct TCP_Server_Info
*tcp_ses
= NULL
;
2750 cifs_dbg(FYI
, "UNC: %s\n", volume_info
->UNC
);
2752 /* see if we already have a matching tcp_ses */
2753 tcp_ses
= cifs_find_tcp_session(volume_info
);
2757 tcp_ses
= kzalloc(sizeof(struct TCP_Server_Info
), GFP_KERNEL
);
2763 tcp_ses
->ops
= volume_info
->ops
;
2764 tcp_ses
->vals
= volume_info
->vals
;
2765 cifs_set_net_ns(tcp_ses
, get_net(current
->nsproxy
->net_ns
));
2766 tcp_ses
->hostname
= extract_hostname(volume_info
->UNC
);
2767 if (IS_ERR(tcp_ses
->hostname
)) {
2768 rc
= PTR_ERR(tcp_ses
->hostname
);
2769 goto out_err_crypto_release
;
2772 tcp_ses
->noblockcnt
= volume_info
->rootfs
;
2773 tcp_ses
->noblocksnd
= volume_info
->noblocksnd
|| volume_info
->rootfs
;
2774 tcp_ses
->noautotune
= volume_info
->noautotune
;
2775 tcp_ses
->tcp_nodelay
= volume_info
->sockopt_tcp_nodelay
;
2776 tcp_ses
->rdma
= volume_info
->rdma
;
2777 tcp_ses
->in_flight
= 0;
2778 tcp_ses
->max_in_flight
= 0;
2779 tcp_ses
->credits
= 1;
2780 init_waitqueue_head(&tcp_ses
->response_q
);
2781 init_waitqueue_head(&tcp_ses
->request_q
);
2782 INIT_LIST_HEAD(&tcp_ses
->pending_mid_q
);
2783 mutex_init(&tcp_ses
->srv_mutex
);
2784 memcpy(tcp_ses
->workstation_RFC1001_name
,
2785 volume_info
->source_rfc1001_name
, RFC1001_NAME_LEN_WITH_NULL
);
2786 memcpy(tcp_ses
->server_RFC1001_name
,
2787 volume_info
->target_rfc1001_name
, RFC1001_NAME_LEN_WITH_NULL
);
2788 tcp_ses
->session_estab
= false;
2789 tcp_ses
->sequence_number
= 0;
2790 tcp_ses
->reconnect_instance
= 1;
2791 tcp_ses
->lstrp
= jiffies
;
2792 tcp_ses
->compress_algorithm
= cpu_to_le16(volume_info
->compression
);
2793 spin_lock_init(&tcp_ses
->req_lock
);
2794 INIT_LIST_HEAD(&tcp_ses
->tcp_ses_list
);
2795 INIT_LIST_HEAD(&tcp_ses
->smb_ses_list
);
2796 INIT_DELAYED_WORK(&tcp_ses
->echo
, cifs_echo_request
);
2797 INIT_DELAYED_WORK(&tcp_ses
->reconnect
, smb2_reconnect_server
);
2798 mutex_init(&tcp_ses
->reconnect_mutex
);
2799 memcpy(&tcp_ses
->srcaddr
, &volume_info
->srcaddr
,
2800 sizeof(tcp_ses
->srcaddr
));
2801 memcpy(&tcp_ses
->dstaddr
, &volume_info
->dstaddr
,
2802 sizeof(tcp_ses
->dstaddr
));
2803 if (volume_info
->use_client_guid
)
2804 memcpy(tcp_ses
->client_guid
, volume_info
->client_guid
,
2805 SMB2_CLIENT_GUID_SIZE
);
2807 generate_random_uuid(tcp_ses
->client_guid
);
2809 * at this point we are the only ones with the pointer
2810 * to the struct since the kernel thread not created yet
2811 * no need to spinlock this init of tcpStatus or srv_count
2813 tcp_ses
->tcpStatus
= CifsNew
;
2814 ++tcp_ses
->srv_count
;
2816 if (volume_info
->echo_interval
>= SMB_ECHO_INTERVAL_MIN
&&
2817 volume_info
->echo_interval
<= SMB_ECHO_INTERVAL_MAX
)
2818 tcp_ses
->echo_interval
= volume_info
->echo_interval
* HZ
;
2820 tcp_ses
->echo_interval
= SMB_ECHO_INTERVAL_DEFAULT
* HZ
;
2821 if (tcp_ses
->rdma
) {
2822 #ifndef CONFIG_CIFS_SMB_DIRECT
2823 cifs_dbg(VFS
, "CONFIG_CIFS_SMB_DIRECT is not enabled\n");
2825 goto out_err_crypto_release
;
2827 tcp_ses
->smbd_conn
= smbd_get_connection(
2828 tcp_ses
, (struct sockaddr
*)&volume_info
->dstaddr
);
2829 if (tcp_ses
->smbd_conn
) {
2830 cifs_dbg(VFS
, "RDMA transport established\n");
2832 goto smbd_connected
;
2835 goto out_err_crypto_release
;
2838 rc
= ip_connect(tcp_ses
);
2840 cifs_dbg(VFS
, "Error connecting to socket. Aborting operation.\n");
2841 goto out_err_crypto_release
;
2845 * since we're in a cifs function already, we know that
2846 * this will succeed. No need for try_module_get().
2848 __module_get(THIS_MODULE
);
2849 tcp_ses
->tsk
= kthread_run(cifs_demultiplex_thread
,
2851 if (IS_ERR(tcp_ses
->tsk
)) {
2852 rc
= PTR_ERR(tcp_ses
->tsk
);
2853 cifs_dbg(VFS
, "error %d create cifsd thread\n", rc
);
2854 module_put(THIS_MODULE
);
2855 goto out_err_crypto_release
;
2857 tcp_ses
->min_offload
= volume_info
->min_offload
;
2858 tcp_ses
->tcpStatus
= CifsNeedNegotiate
;
2860 tcp_ses
->nr_targets
= 1;
2861 tcp_ses
->ignore_signature
= volume_info
->ignore_signature
;
2862 /* thread spawned, put it on the list */
2863 spin_lock(&cifs_tcp_ses_lock
);
2864 list_add(&tcp_ses
->tcp_ses_list
, &cifs_tcp_ses_list
);
2865 spin_unlock(&cifs_tcp_ses_lock
);
2867 cifs_fscache_get_client_cookie(tcp_ses
);
2869 /* queue echo request delayed work */
2870 queue_delayed_work(cifsiod_wq
, &tcp_ses
->echo
, tcp_ses
->echo_interval
);
2874 out_err_crypto_release
:
2875 cifs_crypto_secmech_release(tcp_ses
);
2877 put_net(cifs_net_ns(tcp_ses
));
2881 if (!IS_ERR(tcp_ses
->hostname
))
2882 kfree(tcp_ses
->hostname
);
2883 if (tcp_ses
->ssocket
)
2884 sock_release(tcp_ses
->ssocket
);
2890 static int match_session(struct cifs_ses
*ses
, struct smb_vol
*vol
)
2892 if (vol
->sectype
!= Unspecified
&&
2893 vol
->sectype
!= ses
->sectype
)
2897 * If an existing session is limited to less channels than
2898 * requested, it should not be reused
2900 if (ses
->chan_max
< vol
->max_channels
)
2903 switch (ses
->sectype
) {
2905 if (!uid_eq(vol
->cred_uid
, ses
->cred_uid
))
2909 /* NULL username means anonymous session */
2910 if (ses
->user_name
== NULL
) {
2916 /* anything else takes username/password */
2917 if (strncmp(ses
->user_name
,
2918 vol
->username
? vol
->username
: "",
2919 CIFS_MAX_USERNAME_LEN
))
2921 if ((vol
->username
&& strlen(vol
->username
) != 0) &&
2922 ses
->password
!= NULL
&&
2923 strncmp(ses
->password
,
2924 vol
->password
? vol
->password
: "",
2925 CIFS_MAX_PASSWORD_LEN
))
2932 * cifs_setup_ipc - helper to setup the IPC tcon for the session
2934 * A new IPC connection is made and stored in the session
2935 * tcon_ipc. The IPC tcon has the same lifetime as the session.
2938 cifs_setup_ipc(struct cifs_ses
*ses
, struct smb_vol
*volume_info
)
2941 struct cifs_tcon
*tcon
;
2942 struct nls_table
*nls_codepage
;
2943 char unc
[SERVER_NAME_LENGTH
+ sizeof("//x/IPC$")] = {0};
2945 struct TCP_Server_Info
*server
= ses
->server
;
2948 * If the mount request that resulted in the creation of the
2949 * session requires encryption, force IPC to be encrypted too.
2951 if (volume_info
->seal
) {
2952 if (server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
)
2955 cifs_server_dbg(VFS
,
2956 "IPC: server doesn't support encryption\n");
2961 tcon
= tconInfoAlloc();
2965 scnprintf(unc
, sizeof(unc
), "\\\\%s\\IPC$", server
->hostname
);
2968 nls_codepage
= load_nls_default();
2974 rc
= server
->ops
->tree_connect(xid
, ses
, unc
, tcon
, nls_codepage
);
2978 cifs_server_dbg(VFS
, "failed to connect to IPC (rc=%d)\n", rc
);
2983 cifs_dbg(FYI
, "IPC tcon rc = %d ipc tid = %d\n", rc
, tcon
->tid
);
2985 ses
->tcon_ipc
= tcon
;
2987 unload_nls(nls_codepage
);
2992 * cifs_free_ipc - helper to release the session IPC tcon
2994 * Needs to be called everytime a session is destroyed
2997 cifs_free_ipc(struct cifs_ses
*ses
)
3000 struct cifs_tcon
*tcon
= ses
->tcon_ipc
;
3005 if (ses
->server
->ops
->tree_disconnect
) {
3007 rc
= ses
->server
->ops
->tree_disconnect(xid
, tcon
);
3012 cifs_dbg(FYI
, "failed to disconnect IPC tcon (rc=%d)\n", rc
);
3015 ses
->tcon_ipc
= NULL
;
3019 static struct cifs_ses
*
3020 cifs_find_smb_ses(struct TCP_Server_Info
*server
, struct smb_vol
*vol
)
3022 struct cifs_ses
*ses
;
3024 spin_lock(&cifs_tcp_ses_lock
);
3025 list_for_each_entry(ses
, &server
->smb_ses_list
, smb_ses_list
) {
3026 if (ses
->status
== CifsExiting
)
3028 if (!match_session(ses
, vol
))
3031 spin_unlock(&cifs_tcp_ses_lock
);
3034 spin_unlock(&cifs_tcp_ses_lock
);
3038 void cifs_put_smb_ses(struct cifs_ses
*ses
)
3040 unsigned int rc
, xid
;
3041 struct TCP_Server_Info
*server
= ses
->server
;
3043 cifs_dbg(FYI
, "%s: ses_count=%d\n", __func__
, ses
->ses_count
);
3045 spin_lock(&cifs_tcp_ses_lock
);
3046 if (ses
->status
== CifsExiting
) {
3047 spin_unlock(&cifs_tcp_ses_lock
);
3050 if (--ses
->ses_count
> 0) {
3051 spin_unlock(&cifs_tcp_ses_lock
);
3054 if (ses
->status
== CifsGood
)
3055 ses
->status
= CifsExiting
;
3056 spin_unlock(&cifs_tcp_ses_lock
);
3060 if (ses
->status
== CifsExiting
&& server
->ops
->logoff
) {
3062 rc
= server
->ops
->logoff(xid
, ses
);
3064 cifs_server_dbg(VFS
, "%s: Session Logoff failure rc=%d\n",
3069 spin_lock(&cifs_tcp_ses_lock
);
3070 list_del_init(&ses
->smb_ses_list
);
3071 spin_unlock(&cifs_tcp_ses_lock
);
3073 /* close any extra channels */
3074 if (ses
->chan_count
> 1) {
3077 for (i
= 1; i
< ses
->chan_count
; i
++)
3078 cifs_put_tcp_session(ses
->chans
[i
].server
, 0);
3082 cifs_put_tcp_session(server
, 0);
3087 /* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */
3088 #define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1)
3090 /* Populate username and pw fields from keyring if possible */
3092 cifs_set_cifscreds(struct smb_vol
*vol
, struct cifs_ses
*ses
)
3096 const char *delim
, *payload
;
3100 struct TCP_Server_Info
*server
= ses
->server
;
3101 struct sockaddr_in
*sa
;
3102 struct sockaddr_in6
*sa6
;
3103 const struct user_key_payload
*upayload
;
3105 desc
= kmalloc(CIFSCREDS_DESC_SIZE
, GFP_KERNEL
);
3109 /* try to find an address key first */
3110 switch (server
->dstaddr
.ss_family
) {
3112 sa
= (struct sockaddr_in
*)&server
->dstaddr
;
3113 sprintf(desc
, "cifs:a:%pI4", &sa
->sin_addr
.s_addr
);
3116 sa6
= (struct sockaddr_in6
*)&server
->dstaddr
;
3117 sprintf(desc
, "cifs:a:%pI6c", &sa6
->sin6_addr
.s6_addr
);
3120 cifs_dbg(FYI
, "Bad ss_family (%hu)\n",
3121 server
->dstaddr
.ss_family
);
3126 cifs_dbg(FYI
, "%s: desc=%s\n", __func__
, desc
);
3127 key
= request_key(&key_type_logon
, desc
, "");
3129 if (!ses
->domainName
) {
3130 cifs_dbg(FYI
, "domainName is NULL\n");
3135 /* didn't work, try to find a domain key */
3136 sprintf(desc
, "cifs:d:%s", ses
->domainName
);
3137 cifs_dbg(FYI
, "%s: desc=%s\n", __func__
, desc
);
3138 key
= request_key(&key_type_logon
, desc
, "");
3146 down_read(&key
->sem
);
3147 upayload
= user_key_payload_locked(key
);
3148 if (IS_ERR_OR_NULL(upayload
)) {
3149 rc
= upayload
? PTR_ERR(upayload
) : -EINVAL
;
3153 /* find first : in payload */
3154 payload
= upayload
->data
;
3155 delim
= strnchr(payload
, upayload
->datalen
, ':');
3156 cifs_dbg(FYI
, "payload=%s\n", payload
);
3158 cifs_dbg(FYI
, "Unable to find ':' in payload (datalen=%d)\n",
3164 len
= delim
- payload
;
3165 if (len
> CIFS_MAX_USERNAME_LEN
|| len
<= 0) {
3166 cifs_dbg(FYI
, "Bad value from username search (len=%zd)\n",
3172 vol
->username
= kstrndup(payload
, len
, GFP_KERNEL
);
3173 if (!vol
->username
) {
3174 cifs_dbg(FYI
, "Unable to allocate %zd bytes for username\n",
3179 cifs_dbg(FYI
, "%s: username=%s\n", __func__
, vol
->username
);
3181 len
= key
->datalen
- (len
+ 1);
3182 if (len
> CIFS_MAX_PASSWORD_LEN
|| len
<= 0) {
3183 cifs_dbg(FYI
, "Bad len for password search (len=%zd)\n", len
);
3185 kfree(vol
->username
);
3186 vol
->username
= NULL
;
3191 vol
->password
= kstrndup(delim
, len
, GFP_KERNEL
);
3192 if (!vol
->password
) {
3193 cifs_dbg(FYI
, "Unable to allocate %zd bytes for password\n",
3196 kfree(vol
->username
);
3197 vol
->username
= NULL
;
3202 * If we have a domain key then we must set the domainName in the
3205 if (is_domain
&& ses
->domainName
) {
3206 vol
->domainname
= kstrndup(ses
->domainName
,
3207 strlen(ses
->domainName
),
3209 if (!vol
->domainname
) {
3210 cifs_dbg(FYI
, "Unable to allocate %zd bytes for domain\n",
3213 kfree(vol
->username
);
3214 vol
->username
= NULL
;
3215 kfree_sensitive(vol
->password
);
3216 vol
->password
= NULL
;
3226 cifs_dbg(FYI
, "%s: returning %d\n", __func__
, rc
);
3229 #else /* ! CONFIG_KEYS */
3231 cifs_set_cifscreds(struct smb_vol
*vol
__attribute__((unused
)),
3232 struct cifs_ses
*ses
__attribute__((unused
)))
3236 #endif /* CONFIG_KEYS */
3239 * cifs_get_smb_ses - get a session matching @volume_info data from @server
3241 * This function assumes it is being called from cifs_mount() where we
3242 * already got a server reference (server refcount +1). See
3243 * cifs_get_tcon() for refcount explanations.
3246 cifs_get_smb_ses(struct TCP_Server_Info
*server
, struct smb_vol
*volume_info
)
3250 struct cifs_ses
*ses
;
3251 struct sockaddr_in
*addr
= (struct sockaddr_in
*)&server
->dstaddr
;
3252 struct sockaddr_in6
*addr6
= (struct sockaddr_in6
*)&server
->dstaddr
;
3256 ses
= cifs_find_smb_ses(server
, volume_info
);
3258 cifs_dbg(FYI
, "Existing smb sess found (status=%d)\n",
3261 mutex_lock(&ses
->session_mutex
);
3262 rc
= cifs_negotiate_protocol(xid
, ses
);
3264 mutex_unlock(&ses
->session_mutex
);
3265 /* problem -- put our ses reference */
3266 cifs_put_smb_ses(ses
);
3270 if (ses
->need_reconnect
) {
3271 cifs_dbg(FYI
, "Session needs reconnect\n");
3272 rc
= cifs_setup_session(xid
, ses
,
3273 volume_info
->local_nls
);
3275 mutex_unlock(&ses
->session_mutex
);
3276 /* problem -- put our reference */
3277 cifs_put_smb_ses(ses
);
3282 mutex_unlock(&ses
->session_mutex
);
3284 /* existing SMB ses has a server reference already */
3285 cifs_put_tcp_session(server
, 0);
3290 cifs_dbg(FYI
, "Existing smb sess not found\n");
3291 ses
= sesInfoAlloc();
3295 /* new SMB session uses our server ref */
3296 ses
->server
= server
;
3297 if (server
->dstaddr
.ss_family
== AF_INET6
)
3298 sprintf(ses
->serverName
, "%pI6", &addr6
->sin6_addr
);
3300 sprintf(ses
->serverName
, "%pI4", &addr
->sin_addr
);
3302 if (volume_info
->username
) {
3303 ses
->user_name
= kstrdup(volume_info
->username
, GFP_KERNEL
);
3304 if (!ses
->user_name
)
3308 /* volume_info->password freed at unmount */
3309 if (volume_info
->password
) {
3310 ses
->password
= kstrdup(volume_info
->password
, GFP_KERNEL
);
3314 if (volume_info
->domainname
) {
3315 ses
->domainName
= kstrdup(volume_info
->domainname
, GFP_KERNEL
);
3316 if (!ses
->domainName
)
3319 if (volume_info
->domainauto
)
3320 ses
->domainAuto
= volume_info
->domainauto
;
3321 ses
->cred_uid
= volume_info
->cred_uid
;
3322 ses
->linux_uid
= volume_info
->linux_uid
;
3324 ses
->sectype
= volume_info
->sectype
;
3325 ses
->sign
= volume_info
->sign
;
3326 mutex_lock(&ses
->session_mutex
);
3328 /* add server as first channel */
3329 ses
->chans
[0].server
= server
;
3330 ses
->chan_count
= 1;
3331 ses
->chan_max
= volume_info
->multichannel
? volume_info
->max_channels
:1;
3333 rc
= cifs_negotiate_protocol(xid
, ses
);
3335 rc
= cifs_setup_session(xid
, ses
, volume_info
->local_nls
);
3337 /* each channel uses a different signing key */
3338 memcpy(ses
->chans
[0].signkey
, ses
->smb3signingkey
,
3339 sizeof(ses
->smb3signingkey
));
3341 mutex_unlock(&ses
->session_mutex
);
3345 /* success, put it on the list and add it as first channel */
3346 spin_lock(&cifs_tcp_ses_lock
);
3347 list_add(&ses
->smb_ses_list
, &server
->smb_ses_list
);
3348 spin_unlock(&cifs_tcp_ses_lock
);
3352 cifs_setup_ipc(ses
, volume_info
);
3362 static int match_tcon(struct cifs_tcon
*tcon
, struct smb_vol
*volume_info
)
3364 if (tcon
->tidStatus
== CifsExiting
)
3366 if (strncmp(tcon
->treeName
, volume_info
->UNC
, MAX_TREE_SIZE
))
3368 if (tcon
->seal
!= volume_info
->seal
)
3370 if (tcon
->snapshot_time
!= volume_info
->snapshot_time
)
3372 if (tcon
->handle_timeout
!= volume_info
->handle_timeout
)
3374 if (tcon
->no_lease
!= volume_info
->no_lease
)
3376 if (tcon
->nodelete
!= volume_info
->nodelete
)
3381 static struct cifs_tcon
*
3382 cifs_find_tcon(struct cifs_ses
*ses
, struct smb_vol
*volume_info
)
3384 struct list_head
*tmp
;
3385 struct cifs_tcon
*tcon
;
3387 spin_lock(&cifs_tcp_ses_lock
);
3388 list_for_each(tmp
, &ses
->tcon_list
) {
3389 tcon
= list_entry(tmp
, struct cifs_tcon
, tcon_list
);
3390 #ifdef CONFIG_CIFS_DFS_UPCALL
3394 if (!match_tcon(tcon
, volume_info
))
3397 spin_unlock(&cifs_tcp_ses_lock
);
3400 spin_unlock(&cifs_tcp_ses_lock
);
3405 cifs_put_tcon(struct cifs_tcon
*tcon
)
3408 struct cifs_ses
*ses
;
3411 * IPC tcon share the lifetime of their session and are
3412 * destroyed in the session put function
3414 if (tcon
== NULL
|| tcon
->ipc
)
3418 cifs_dbg(FYI
, "%s: tc_count=%d\n", __func__
, tcon
->tc_count
);
3419 spin_lock(&cifs_tcp_ses_lock
);
3420 if (--tcon
->tc_count
> 0) {
3421 spin_unlock(&cifs_tcp_ses_lock
);
3425 list_del_init(&tcon
->tcon_list
);
3426 spin_unlock(&cifs_tcp_ses_lock
);
3429 if (ses
->server
->ops
->tree_disconnect
)
3430 ses
->server
->ops
->tree_disconnect(xid
, tcon
);
3433 cifs_fscache_release_super_cookie(tcon
);
3435 cifs_put_smb_ses(ses
);
3439 * cifs_get_tcon - get a tcon matching @volume_info data from @ses
3441 * - tcon refcount is the number of mount points using the tcon.
3442 * - ses refcount is the number of tcon using the session.
3444 * 1. This function assumes it is being called from cifs_mount() where
3445 * we already got a session reference (ses refcount +1).
3447 * 2. Since we're in the context of adding a mount point, the end
3448 * result should be either:
3450 * a) a new tcon already allocated with refcount=1 (1 mount point) and
3451 * its session refcount incremented (1 new tcon). This +1 was
3452 * already done in (1).
3454 * b) an existing tcon with refcount+1 (add a mount point to it) and
3455 * identical ses refcount (no new tcon). Because of (1) we need to
3456 * decrement the ses refcount.
3458 static struct cifs_tcon
*
3459 cifs_get_tcon(struct cifs_ses
*ses
, struct smb_vol
*volume_info
)
3462 struct cifs_tcon
*tcon
;
3464 tcon
= cifs_find_tcon(ses
, volume_info
);
3467 * tcon has refcount already incremented but we need to
3468 * decrement extra ses reference gotten by caller (case b)
3470 cifs_dbg(FYI
, "Found match on UNC path\n");
3471 cifs_put_smb_ses(ses
);
3475 if (!ses
->server
->ops
->tree_connect
) {
3480 tcon
= tconInfoAlloc();
3486 if (volume_info
->snapshot_time
) {
3487 if (ses
->server
->vals
->protocol_id
== 0) {
3489 "Use SMB2 or later for snapshot mount option\n");
3493 tcon
->snapshot_time
= volume_info
->snapshot_time
;
3496 if (volume_info
->handle_timeout
) {
3497 if (ses
->server
->vals
->protocol_id
== 0) {
3499 "Use SMB2.1 or later for handle timeout option\n");
3503 tcon
->handle_timeout
= volume_info
->handle_timeout
;
3507 if (volume_info
->password
) {
3508 tcon
->password
= kstrdup(volume_info
->password
, GFP_KERNEL
);
3509 if (!tcon
->password
) {
3515 if (volume_info
->seal
) {
3516 if (ses
->server
->vals
->protocol_id
== 0) {
3518 "SMB3 or later required for encryption\n");
3521 } else if (tcon
->ses
->server
->capabilities
&
3522 SMB2_GLOBAL_CAP_ENCRYPTION
)
3525 cifs_dbg(VFS
, "Encryption is not supported on share\n");
3531 if (volume_info
->linux_ext
) {
3532 if (ses
->server
->posix_ext_supported
) {
3533 tcon
->posix_extensions
= true;
3534 pr_warn_once("SMB3.11 POSIX Extensions are experimental\n");
3536 cifs_dbg(VFS
, "Server does not support mounting with posix SMB3.11 extensions\n");
3543 * BB Do we need to wrap session_mutex around this TCon call and Unix
3544 * SetFS as we do on SessSetup and reconnect?
3547 rc
= ses
->server
->ops
->tree_connect(xid
, ses
, volume_info
->UNC
, tcon
,
3548 volume_info
->local_nls
);
3550 cifs_dbg(FYI
, "Tcon rc = %d\n", rc
);
3554 tcon
->use_persistent
= false;
3555 /* check if SMB2 or later, CIFS does not support persistent handles */
3556 if (volume_info
->persistent
) {
3557 if (ses
->server
->vals
->protocol_id
== 0) {
3559 "SMB3 or later required for persistent handles\n");
3562 } else if (ses
->server
->capabilities
&
3563 SMB2_GLOBAL_CAP_PERSISTENT_HANDLES
)
3564 tcon
->use_persistent
= true;
3565 else /* persistent handles requested but not supported */ {
3567 "Persistent handles not supported on share\n");
3571 } else if ((tcon
->capabilities
& SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY
)
3572 && (ses
->server
->capabilities
& SMB2_GLOBAL_CAP_PERSISTENT_HANDLES
)
3573 && (volume_info
->nopersistent
== false)) {
3574 cifs_dbg(FYI
, "enabling persistent handles\n");
3575 tcon
->use_persistent
= true;
3576 } else if (volume_info
->resilient
) {
3577 if (ses
->server
->vals
->protocol_id
== 0) {
3579 "SMB2.1 or later required for resilient handles\n");
3583 tcon
->use_resilient
= true;
3586 /* If the user really knows what they are doing they can override */
3587 if (tcon
->share_flags
& SMB2_SHAREFLAG_NO_CACHING
) {
3588 if (volume_info
->cache_ro
)
3589 cifs_dbg(VFS
, "cache=ro requested on mount but NO_CACHING flag set on share\n");
3590 else if (volume_info
->cache_rw
)
3591 cifs_dbg(VFS
, "cache=singleclient requested on mount but NO_CACHING flag set on share\n");
3594 if (volume_info
->no_lease
) {
3595 if (ses
->server
->vals
->protocol_id
== 0) {
3597 "SMB2 or later required for nolease option\n");
3601 tcon
->no_lease
= volume_info
->no_lease
;
3605 * We can have only one retry value for a connection to a share so for
3606 * resources mounted more than once to the same server share the last
3607 * value passed in for the retry flag is used.
3609 tcon
->retry
= volume_info
->retry
;
3610 tcon
->nocase
= volume_info
->nocase
;
3611 if (ses
->server
->capabilities
& SMB2_GLOBAL_CAP_DIRECTORY_LEASING
)
3612 tcon
->nohandlecache
= volume_info
->nohandlecache
;
3614 tcon
->nohandlecache
= 1;
3615 tcon
->nodelete
= volume_info
->nodelete
;
3616 tcon
->local_lease
= volume_info
->local_lease
;
3617 INIT_LIST_HEAD(&tcon
->pending_opens
);
3619 spin_lock(&cifs_tcp_ses_lock
);
3620 list_add(&tcon
->tcon_list
, &ses
->tcon_list
);
3621 spin_unlock(&cifs_tcp_ses_lock
);
3623 cifs_fscache_get_super_cookie(tcon
);
3633 cifs_put_tlink(struct tcon_link
*tlink
)
3635 if (!tlink
|| IS_ERR(tlink
))
3638 if (!atomic_dec_and_test(&tlink
->tl_count
) ||
3639 test_bit(TCON_LINK_IN_TREE
, &tlink
->tl_flags
)) {
3640 tlink
->tl_time
= jiffies
;
3644 if (!IS_ERR(tlink_tcon(tlink
)))
3645 cifs_put_tcon(tlink_tcon(tlink
));
3651 compare_mount_options(struct super_block
*sb
, struct cifs_mnt_data
*mnt_data
)
3653 struct cifs_sb_info
*old
= CIFS_SB(sb
);
3654 struct cifs_sb_info
*new = mnt_data
->cifs_sb
;
3655 unsigned int oldflags
= old
->mnt_cifs_flags
& CIFS_MOUNT_MASK
;
3656 unsigned int newflags
= new->mnt_cifs_flags
& CIFS_MOUNT_MASK
;
3658 if ((sb
->s_flags
& CIFS_MS_MASK
) != (mnt_data
->flags
& CIFS_MS_MASK
))
3661 if (old
->mnt_cifs_serverino_autodisabled
)
3662 newflags
&= ~CIFS_MOUNT_SERVER_INUM
;
3664 if (oldflags
!= newflags
)
3668 * We want to share sb only if we don't specify an r/wsize or
3669 * specified r/wsize is greater than or equal to existing one.
3671 if (new->wsize
&& new->wsize
< old
->wsize
)
3674 if (new->rsize
&& new->rsize
< old
->rsize
)
3677 if (!uid_eq(old
->mnt_uid
, new->mnt_uid
) || !gid_eq(old
->mnt_gid
, new->mnt_gid
))
3680 if (old
->mnt_file_mode
!= new->mnt_file_mode
||
3681 old
->mnt_dir_mode
!= new->mnt_dir_mode
)
3684 if (strcmp(old
->local_nls
->charset
, new->local_nls
->charset
))
3687 if (old
->actimeo
!= new->actimeo
)
3694 match_prepath(struct super_block
*sb
, struct cifs_mnt_data
*mnt_data
)
3696 struct cifs_sb_info
*old
= CIFS_SB(sb
);
3697 struct cifs_sb_info
*new = mnt_data
->cifs_sb
;
3698 bool old_set
= (old
->mnt_cifs_flags
& CIFS_MOUNT_USE_PREFIX_PATH
) &&
3700 bool new_set
= (new->mnt_cifs_flags
& CIFS_MOUNT_USE_PREFIX_PATH
) &&
3703 if (old_set
&& new_set
&& !strcmp(new->prepath
, old
->prepath
))
3705 else if (!old_set
&& !new_set
)
3712 cifs_match_super(struct super_block
*sb
, void *data
)
3714 struct cifs_mnt_data
*mnt_data
= (struct cifs_mnt_data
*)data
;
3715 struct smb_vol
*volume_info
;
3716 struct cifs_sb_info
*cifs_sb
;
3717 struct TCP_Server_Info
*tcp_srv
;
3718 struct cifs_ses
*ses
;
3719 struct cifs_tcon
*tcon
;
3720 struct tcon_link
*tlink
;
3723 spin_lock(&cifs_tcp_ses_lock
);
3724 cifs_sb
= CIFS_SB(sb
);
3725 tlink
= cifs_get_tlink(cifs_sb_master_tlink(cifs_sb
));
3726 if (IS_ERR(tlink
)) {
3727 spin_unlock(&cifs_tcp_ses_lock
);
3730 tcon
= tlink_tcon(tlink
);
3732 tcp_srv
= ses
->server
;
3734 volume_info
= mnt_data
->vol
;
3736 if (!match_server(tcp_srv
, volume_info
) ||
3737 !match_session(ses
, volume_info
) ||
3738 !match_tcon(tcon
, volume_info
) ||
3739 !match_prepath(sb
, mnt_data
)) {
3744 rc
= compare_mount_options(sb
, mnt_data
);
3746 spin_unlock(&cifs_tcp_ses_lock
);
3747 cifs_put_tlink(tlink
);
3751 #ifdef CONFIG_DEBUG_LOCK_ALLOC
3752 static struct lock_class_key cifs_key
[2];
3753 static struct lock_class_key cifs_slock_key
[2];
3756 cifs_reclassify_socket4(struct socket
*sock
)
3758 struct sock
*sk
= sock
->sk
;
3759 BUG_ON(!sock_allow_reclassification(sk
));
3760 sock_lock_init_class_and_name(sk
, "slock-AF_INET-CIFS",
3761 &cifs_slock_key
[0], "sk_lock-AF_INET-CIFS", &cifs_key
[0]);
3765 cifs_reclassify_socket6(struct socket
*sock
)
3767 struct sock
*sk
= sock
->sk
;
3768 BUG_ON(!sock_allow_reclassification(sk
));
3769 sock_lock_init_class_and_name(sk
, "slock-AF_INET6-CIFS",
3770 &cifs_slock_key
[1], "sk_lock-AF_INET6-CIFS", &cifs_key
[1]);
3774 cifs_reclassify_socket4(struct socket
*sock
)
3779 cifs_reclassify_socket6(struct socket
*sock
)
3784 /* See RFC1001 section 14 on representation of Netbios names */
3785 static void rfc1002mangle(char *target
, char *source
, unsigned int length
)
3789 for (i
= 0, j
= 0; i
< (length
); i
++) {
3790 /* mask a nibble at a time and encode */
3791 target
[j
] = 'A' + (0x0F & (source
[i
] >> 4));
3792 target
[j
+1] = 'A' + (0x0F & source
[i
]);
3799 bind_socket(struct TCP_Server_Info
*server
)
3802 if (server
->srcaddr
.ss_family
!= AF_UNSPEC
) {
3803 /* Bind to the specified local IP address */
3804 struct socket
*socket
= server
->ssocket
;
3805 rc
= socket
->ops
->bind(socket
,
3806 (struct sockaddr
*) &server
->srcaddr
,
3807 sizeof(server
->srcaddr
));
3809 struct sockaddr_in
*saddr4
;
3810 struct sockaddr_in6
*saddr6
;
3811 saddr4
= (struct sockaddr_in
*)&server
->srcaddr
;
3812 saddr6
= (struct sockaddr_in6
*)&server
->srcaddr
;
3813 if (saddr6
->sin6_family
== AF_INET6
)
3814 cifs_server_dbg(VFS
, "Failed to bind to: %pI6c, error: %d\n",
3815 &saddr6
->sin6_addr
, rc
);
3817 cifs_server_dbg(VFS
, "Failed to bind to: %pI4, error: %d\n",
3818 &saddr4
->sin_addr
.s_addr
, rc
);
3825 ip_rfc1001_connect(struct TCP_Server_Info
*server
)
3829 * some servers require RFC1001 sessinit before sending
3830 * negprot - BB check reconnection in case where second
3831 * sessinit is sent but no second negprot
3833 struct rfc1002_session_packet
*ses_init_buf
;
3834 struct smb_hdr
*smb_buf
;
3835 ses_init_buf
= kzalloc(sizeof(struct rfc1002_session_packet
),
3838 ses_init_buf
->trailer
.session_req
.called_len
= 32;
3840 if (server
->server_RFC1001_name
[0] != 0)
3841 rfc1002mangle(ses_init_buf
->trailer
.
3842 session_req
.called_name
,
3843 server
->server_RFC1001_name
,
3844 RFC1001_NAME_LEN_WITH_NULL
);
3846 rfc1002mangle(ses_init_buf
->trailer
.
3847 session_req
.called_name
,
3848 DEFAULT_CIFS_CALLED_NAME
,
3849 RFC1001_NAME_LEN_WITH_NULL
);
3851 ses_init_buf
->trailer
.session_req
.calling_len
= 32;
3854 * calling name ends in null (byte 16) from old smb
3857 if (server
->workstation_RFC1001_name
[0] != 0)
3858 rfc1002mangle(ses_init_buf
->trailer
.
3859 session_req
.calling_name
,
3860 server
->workstation_RFC1001_name
,
3861 RFC1001_NAME_LEN_WITH_NULL
);
3863 rfc1002mangle(ses_init_buf
->trailer
.
3864 session_req
.calling_name
,
3866 RFC1001_NAME_LEN_WITH_NULL
);
3868 ses_init_buf
->trailer
.session_req
.scope1
= 0;
3869 ses_init_buf
->trailer
.session_req
.scope2
= 0;
3870 smb_buf
= (struct smb_hdr
*)ses_init_buf
;
3872 /* sizeof RFC1002_SESSION_REQUEST with no scope */
3873 smb_buf
->smb_buf_length
= cpu_to_be32(0x81000044);
3874 rc
= smb_send(server
, smb_buf
, 0x44);
3875 kfree(ses_init_buf
);
3877 * RFC1001 layer in at least one server
3878 * requires very short break before negprot
3879 * presumably because not expecting negprot
3880 * to follow so fast. This is a simple
3881 * solution that works without
3882 * complicating the code and causes no
3883 * significant slowing down on mount
3886 usleep_range(1000, 2000);
3889 * else the negprot may still work without this
3890 * even though malloc failed
3897 generic_ip_connect(struct TCP_Server_Info
*server
)
3902 struct socket
*socket
= server
->ssocket
;
3903 struct sockaddr
*saddr
;
3905 saddr
= (struct sockaddr
*) &server
->dstaddr
;
3907 if (server
->dstaddr
.ss_family
== AF_INET6
) {
3908 struct sockaddr_in6
*ipv6
= (struct sockaddr_in6
*)&server
->dstaddr
;
3910 sport
= ipv6
->sin6_port
;
3911 slen
= sizeof(struct sockaddr_in6
);
3913 cifs_dbg(FYI
, "%s: connecting to [%pI6]:%d\n", __func__
, &ipv6
->sin6_addr
,
3916 struct sockaddr_in
*ipv4
= (struct sockaddr_in
*)&server
->dstaddr
;
3918 sport
= ipv4
->sin_port
;
3919 slen
= sizeof(struct sockaddr_in
);
3921 cifs_dbg(FYI
, "%s: connecting to %pI4:%d\n", __func__
, &ipv4
->sin_addr
,
3925 if (socket
== NULL
) {
3926 rc
= __sock_create(cifs_net_ns(server
), sfamily
, SOCK_STREAM
,
3927 IPPROTO_TCP
, &socket
, 1);
3929 cifs_server_dbg(VFS
, "Error %d creating socket\n", rc
);
3930 server
->ssocket
= NULL
;
3934 /* BB other socket options to set KEEPALIVE, NODELAY? */
3935 cifs_dbg(FYI
, "Socket created\n");
3936 server
->ssocket
= socket
;
3937 socket
->sk
->sk_allocation
= GFP_NOFS
;
3938 if (sfamily
== AF_INET6
)
3939 cifs_reclassify_socket6(socket
);
3941 cifs_reclassify_socket4(socket
);
3944 rc
= bind_socket(server
);
3949 * Eventually check for other socket options to change from
3950 * the default. sock_setsockopt not used because it expects
3953 socket
->sk
->sk_rcvtimeo
= 7 * HZ
;
3954 socket
->sk
->sk_sndtimeo
= 5 * HZ
;
3956 /* make the bufsizes depend on wsize/rsize and max requests */
3957 if (server
->noautotune
) {
3958 if (socket
->sk
->sk_sndbuf
< (200 * 1024))
3959 socket
->sk
->sk_sndbuf
= 200 * 1024;
3960 if (socket
->sk
->sk_rcvbuf
< (140 * 1024))
3961 socket
->sk
->sk_rcvbuf
= 140 * 1024;
3964 if (server
->tcp_nodelay
)
3965 tcp_sock_set_nodelay(socket
->sk
);
3967 cifs_dbg(FYI
, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n",
3968 socket
->sk
->sk_sndbuf
,
3969 socket
->sk
->sk_rcvbuf
, socket
->sk
->sk_rcvtimeo
);
3971 rc
= socket
->ops
->connect(socket
, saddr
, slen
,
3972 server
->noblockcnt
? O_NONBLOCK
: 0);
3974 * When mounting SMB root file systems, we do not want to block in
3975 * connect. Otherwise bail out and then let cifs_reconnect() perform
3976 * reconnect failover - if possible.
3978 if (server
->noblockcnt
&& rc
== -EINPROGRESS
)
3981 cifs_dbg(FYI
, "Error %d connecting to server\n", rc
);
3982 sock_release(socket
);
3983 server
->ssocket
= NULL
;
3987 if (sport
== htons(RFC1001_PORT
))
3988 rc
= ip_rfc1001_connect(server
);
3994 ip_connect(struct TCP_Server_Info
*server
)
3997 struct sockaddr_in6
*addr6
= (struct sockaddr_in6
*)&server
->dstaddr
;
3998 struct sockaddr_in
*addr
= (struct sockaddr_in
*)&server
->dstaddr
;
4000 if (server
->dstaddr
.ss_family
== AF_INET6
)
4001 sport
= &addr6
->sin6_port
;
4003 sport
= &addr
->sin_port
;
4008 /* try with 445 port at first */
4009 *sport
= htons(CIFS_PORT
);
4011 rc
= generic_ip_connect(server
);
4015 /* if it failed, try with 139 port */
4016 *sport
= htons(RFC1001_PORT
);
4019 return generic_ip_connect(server
);
4022 void reset_cifs_unix_caps(unsigned int xid
, struct cifs_tcon
*tcon
,
4023 struct cifs_sb_info
*cifs_sb
, struct smb_vol
*vol_info
)
4025 /* if we are reconnecting then should we check to see if
4026 * any requested capabilities changed locally e.g. via
4027 * remount but we can not do much about it here
4028 * if they have (even if we could detect it by the following)
4029 * Perhaps we could add a backpointer to array of sb from tcon
4030 * or if we change to make all sb to same share the same
4031 * sb as NFS - then we only have one backpointer to sb.
4032 * What if we wanted to mount the server share twice once with
4033 * and once without posixacls or posix paths? */
4034 __u64 saved_cap
= le64_to_cpu(tcon
->fsUnixInfo
.Capability
);
4036 if (vol_info
&& vol_info
->no_linux_ext
) {
4037 tcon
->fsUnixInfo
.Capability
= 0;
4038 tcon
->unix_ext
= 0; /* Unix Extensions disabled */
4039 cifs_dbg(FYI
, "Linux protocol extensions disabled\n");
4041 } else if (vol_info
)
4042 tcon
->unix_ext
= 1; /* Unix Extensions supported */
4044 if (tcon
->unix_ext
== 0) {
4045 cifs_dbg(FYI
, "Unix extensions disabled so not set on reconnect\n");
4049 if (!CIFSSMBQFSUnixInfo(xid
, tcon
)) {
4050 __u64 cap
= le64_to_cpu(tcon
->fsUnixInfo
.Capability
);
4051 cifs_dbg(FYI
, "unix caps which server supports %lld\n", cap
);
4052 /* check for reconnect case in which we do not
4053 want to change the mount behavior if we can avoid it */
4054 if (vol_info
== NULL
) {
4055 /* turn off POSIX ACL and PATHNAMES if not set
4056 originally at mount time */
4057 if ((saved_cap
& CIFS_UNIX_POSIX_ACL_CAP
) == 0)
4058 cap
&= ~CIFS_UNIX_POSIX_ACL_CAP
;
4059 if ((saved_cap
& CIFS_UNIX_POSIX_PATHNAMES_CAP
) == 0) {
4060 if (cap
& CIFS_UNIX_POSIX_PATHNAMES_CAP
)
4061 cifs_dbg(VFS
, "POSIXPATH support change\n");
4062 cap
&= ~CIFS_UNIX_POSIX_PATHNAMES_CAP
;
4063 } else if ((cap
& CIFS_UNIX_POSIX_PATHNAMES_CAP
) == 0) {
4064 cifs_dbg(VFS
, "possible reconnect error\n");
4065 cifs_dbg(VFS
, "server disabled POSIX path support\n");
4069 if (cap
& CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP
)
4070 cifs_dbg(VFS
, "per-share encryption not supported yet\n");
4072 cap
&= CIFS_UNIX_CAP_MASK
;
4073 if (vol_info
&& vol_info
->no_psx_acl
)
4074 cap
&= ~CIFS_UNIX_POSIX_ACL_CAP
;
4075 else if (CIFS_UNIX_POSIX_ACL_CAP
& cap
) {
4076 cifs_dbg(FYI
, "negotiated posix acl support\n");
4078 cifs_sb
->mnt_cifs_flags
|=
4079 CIFS_MOUNT_POSIXACL
;
4082 if (vol_info
&& vol_info
->posix_paths
== 0)
4083 cap
&= ~CIFS_UNIX_POSIX_PATHNAMES_CAP
;
4084 else if (cap
& CIFS_UNIX_POSIX_PATHNAMES_CAP
) {
4085 cifs_dbg(FYI
, "negotiate posix pathnames\n");
4087 cifs_sb
->mnt_cifs_flags
|=
4088 CIFS_MOUNT_POSIX_PATHS
;
4091 cifs_dbg(FYI
, "Negotiate caps 0x%x\n", (int)cap
);
4092 #ifdef CONFIG_CIFS_DEBUG2
4093 if (cap
& CIFS_UNIX_FCNTL_CAP
)
4094 cifs_dbg(FYI
, "FCNTL cap\n");
4095 if (cap
& CIFS_UNIX_EXTATTR_CAP
)
4096 cifs_dbg(FYI
, "EXTATTR cap\n");
4097 if (cap
& CIFS_UNIX_POSIX_PATHNAMES_CAP
)
4098 cifs_dbg(FYI
, "POSIX path cap\n");
4099 if (cap
& CIFS_UNIX_XATTR_CAP
)
4100 cifs_dbg(FYI
, "XATTR cap\n");
4101 if (cap
& CIFS_UNIX_POSIX_ACL_CAP
)
4102 cifs_dbg(FYI
, "POSIX ACL cap\n");
4103 if (cap
& CIFS_UNIX_LARGE_READ_CAP
)
4104 cifs_dbg(FYI
, "very large read cap\n");
4105 if (cap
& CIFS_UNIX_LARGE_WRITE_CAP
)
4106 cifs_dbg(FYI
, "very large write cap\n");
4107 if (cap
& CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP
)
4108 cifs_dbg(FYI
, "transport encryption cap\n");
4109 if (cap
& CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP
)
4110 cifs_dbg(FYI
, "mandatory transport encryption cap\n");
4111 #endif /* CIFS_DEBUG2 */
4112 if (CIFSSMBSetFSUnixInfo(xid
, tcon
, cap
)) {
4113 if (vol_info
== NULL
) {
4114 cifs_dbg(FYI
, "resetting capabilities failed\n");
4116 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");
4122 int cifs_setup_cifs_sb(struct smb_vol
*pvolume_info
,
4123 struct cifs_sb_info
*cifs_sb
)
4125 INIT_DELAYED_WORK(&cifs_sb
->prune_tlinks
, cifs_prune_tlinks
);
4127 spin_lock_init(&cifs_sb
->tlink_tree_lock
);
4128 cifs_sb
->tlink_tree
= RB_ROOT
;
4130 cifs_sb
->bsize
= pvolume_info
->bsize
;
4132 * Temporarily set r/wsize for matching superblock. If we end up using
4133 * new sb then client will later negotiate it downward if needed.
4135 cifs_sb
->rsize
= pvolume_info
->rsize
;
4136 cifs_sb
->wsize
= pvolume_info
->wsize
;
4138 cifs_sb
->mnt_uid
= pvolume_info
->linux_uid
;
4139 cifs_sb
->mnt_gid
= pvolume_info
->linux_gid
;
4140 cifs_sb
->mnt_file_mode
= pvolume_info
->file_mode
;
4141 cifs_sb
->mnt_dir_mode
= pvolume_info
->dir_mode
;
4142 cifs_dbg(FYI
, "file mode: %04ho dir mode: %04ho\n",
4143 cifs_sb
->mnt_file_mode
, cifs_sb
->mnt_dir_mode
);
4145 cifs_sb
->actimeo
= pvolume_info
->actimeo
;
4146 cifs_sb
->local_nls
= pvolume_info
->local_nls
;
4148 if (pvolume_info
->nodfs
)
4149 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NO_DFS
;
4150 if (pvolume_info
->noperm
)
4151 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NO_PERM
;
4152 if (pvolume_info
->setuids
)
4153 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_SET_UID
;
4154 if (pvolume_info
->setuidfromacl
)
4155 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_UID_FROM_ACL
;
4156 if (pvolume_info
->server_ino
)
4157 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_SERVER_INUM
;
4158 if (pvolume_info
->remap
)
4159 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_MAP_SFM_CHR
;
4160 if (pvolume_info
->sfu_remap
)
4161 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_MAP_SPECIAL_CHR
;
4162 if (pvolume_info
->no_xattr
)
4163 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NO_XATTR
;
4164 if (pvolume_info
->sfu_emul
)
4165 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_UNX_EMUL
;
4166 if (pvolume_info
->nobrl
)
4167 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NO_BRL
;
4168 if (pvolume_info
->nohandlecache
)
4169 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NO_HANDLE_CACHE
;
4170 if (pvolume_info
->nostrictsync
)
4171 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NOSSYNC
;
4172 if (pvolume_info
->mand_lock
)
4173 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_NOPOSIXBRL
;
4174 if (pvolume_info
->rwpidforward
)
4175 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_RWPIDFORWARD
;
4176 if (pvolume_info
->mode_ace
)
4177 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_MODE_FROM_SID
;
4178 if (pvolume_info
->cifs_acl
)
4179 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_CIFS_ACL
;
4180 if (pvolume_info
->backupuid_specified
) {
4181 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_CIFS_BACKUPUID
;
4182 cifs_sb
->mnt_backupuid
= pvolume_info
->backupuid
;
4184 if (pvolume_info
->backupgid_specified
) {
4185 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_CIFS_BACKUPGID
;
4186 cifs_sb
->mnt_backupgid
= pvolume_info
->backupgid
;
4188 if (pvolume_info
->override_uid
)
4189 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_OVERR_UID
;
4190 if (pvolume_info
->override_gid
)
4191 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_OVERR_GID
;
4192 if (pvolume_info
->dynperm
)
4193 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_DYNPERM
;
4194 if (pvolume_info
->fsc
)
4195 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_FSCACHE
;
4196 if (pvolume_info
->multiuser
)
4197 cifs_sb
->mnt_cifs_flags
|= (CIFS_MOUNT_MULTIUSER
|
4198 CIFS_MOUNT_NO_PERM
);
4199 if (pvolume_info
->strict_io
)
4200 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_STRICT_IO
;
4201 if (pvolume_info
->direct_io
) {
4202 cifs_dbg(FYI
, "mounting share using direct i/o\n");
4203 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_DIRECT_IO
;
4205 if (pvolume_info
->cache_ro
) {
4206 cifs_dbg(VFS
, "mounting share with read only caching. Ensure that the share will not be modified while in use.\n");
4207 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_RO_CACHE
;
4208 } else if (pvolume_info
->cache_rw
) {
4209 cifs_dbg(VFS
, "mounting share in single client RW caching mode. Ensure that no other systems will be accessing the share.\n");
4210 cifs_sb
->mnt_cifs_flags
|= (CIFS_MOUNT_RO_CACHE
|
4211 CIFS_MOUNT_RW_CACHE
);
4213 if (pvolume_info
->mfsymlinks
) {
4214 if (pvolume_info
->sfu_emul
) {
4216 * Our SFU ("Services for Unix" emulation does not allow
4217 * creating symlinks but does allow reading existing SFU
4218 * symlinks (it does allow both creating and reading SFU
4219 * style mknod and FIFOs though). When "mfsymlinks" and
4220 * "sfu" are both enabled at the same time, it allows
4221 * reading both types of symlinks, but will only create
4222 * them with mfsymlinks format. This allows better
4223 * Apple compatibility (probably better for Samba too)
4224 * while still recognizing old Windows style symlinks.
4226 cifs_dbg(VFS
, "mount options mfsymlinks and sfu both enabled\n");
4228 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_MF_SYMLINKS
;
4231 if ((pvolume_info
->cifs_acl
) && (pvolume_info
->dynperm
))
4232 cifs_dbg(VFS
, "mount option dynperm ignored if cifsacl mount option supported\n");
4234 if (pvolume_info
->prepath
) {
4235 cifs_sb
->prepath
= kstrdup(pvolume_info
->prepath
, GFP_KERNEL
);
4236 if (cifs_sb
->prepath
== NULL
)
4244 cifs_cleanup_volume_info_contents(struct smb_vol
*volume_info
)
4246 kfree(volume_info
->username
);
4247 kfree_sensitive(volume_info
->password
);
4248 kfree(volume_info
->UNC
);
4249 kfree(volume_info
->domainname
);
4250 kfree(volume_info
->iocharset
);
4251 kfree(volume_info
->prepath
);
4255 cifs_cleanup_volume_info(struct smb_vol
*volume_info
)
4259 cifs_cleanup_volume_info_contents(volume_info
);
4263 /* Release all succeed connections */
4264 static inline void mount_put_conns(struct cifs_sb_info
*cifs_sb
,
4266 struct TCP_Server_Info
*server
,
4267 struct cifs_ses
*ses
, struct cifs_tcon
*tcon
)
4272 cifs_put_tcon(tcon
);
4274 cifs_put_smb_ses(ses
);
4276 cifs_put_tcp_session(server
, 0);
4277 cifs_sb
->mnt_cifs_flags
&= ~CIFS_MOUNT_POSIX_PATHS
;
4281 /* Get connections for tcp, ses and tcon */
4282 static int mount_get_conns(struct smb_vol
*vol
, struct cifs_sb_info
*cifs_sb
,
4284 struct TCP_Server_Info
**nserver
,
4285 struct cifs_ses
**nses
, struct cifs_tcon
**ntcon
)
4288 struct TCP_Server_Info
*server
;
4289 struct cifs_ses
*ses
;
4290 struct cifs_tcon
*tcon
;
4298 /* get a reference to a tcp session */
4299 server
= cifs_get_tcp_session(vol
);
4300 if (IS_ERR(server
)) {
4301 rc
= PTR_ERR(server
);
4307 if ((vol
->max_credits
< 20) || (vol
->max_credits
> 60000))
4308 server
->max_credits
= SMB2_MAX_CREDITS_AVAILABLE
;
4310 server
->max_credits
= vol
->max_credits
;
4312 /* get a reference to a SMB session */
4313 ses
= cifs_get_smb_ses(server
, vol
);
4321 if ((vol
->persistent
== true) && (!(ses
->server
->capabilities
&
4322 SMB2_GLOBAL_CAP_PERSISTENT_HANDLES
))) {
4323 cifs_server_dbg(VFS
, "persistent handles not supported by server\n");
4327 /* search for existing tcon to this server share */
4328 tcon
= cifs_get_tcon(ses
, vol
);
4336 /* if new SMB3.11 POSIX extensions are supported do not remap / and \ */
4337 if (tcon
->posix_extensions
)
4338 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_POSIX_PATHS
;
4340 /* tell server which Unix caps we support */
4341 if (cap_unix(tcon
->ses
)) {
4343 * reset of caps checks mount to see if unix extensions disabled
4344 * for just this mount.
4346 reset_cifs_unix_caps(*xid
, tcon
, cifs_sb
, vol
);
4347 if ((tcon
->ses
->server
->tcpStatus
== CifsNeedReconnect
) &&
4348 (le64_to_cpu(tcon
->fsUnixInfo
.Capability
) &
4349 CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP
))
4352 tcon
->unix_ext
= 0; /* server does not support them */
4354 /* do not care if a following call succeed - informational */
4355 if (!tcon
->pipe
&& server
->ops
->qfs_tcon
) {
4356 server
->ops
->qfs_tcon(*xid
, tcon
, cifs_sb
);
4357 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_RO_CACHE
) {
4358 if (tcon
->fsDevInfo
.DeviceCharacteristics
&
4359 cpu_to_le32(FILE_READ_ONLY_DEVICE
))
4360 cifs_dbg(VFS
, "mounted to read only share\n");
4361 else if ((cifs_sb
->mnt_cifs_flags
&
4362 CIFS_MOUNT_RW_CACHE
) == 0)
4363 cifs_dbg(VFS
, "read only mount of RW share\n");
4364 /* no need to log a RW mount of a typical RW share */
4368 cifs_sb
->wsize
= server
->ops
->negotiate_wsize(tcon
, vol
);
4369 cifs_sb
->rsize
= server
->ops
->negotiate_rsize(tcon
, vol
);
4374 static int mount_setup_tlink(struct cifs_sb_info
*cifs_sb
, struct cifs_ses
*ses
,
4375 struct cifs_tcon
*tcon
)
4377 struct tcon_link
*tlink
;
4379 /* hang the tcon off of the superblock */
4380 tlink
= kzalloc(sizeof(*tlink
), GFP_KERNEL
);
4384 tlink
->tl_uid
= ses
->linux_uid
;
4385 tlink
->tl_tcon
= tcon
;
4386 tlink
->tl_time
= jiffies
;
4387 set_bit(TCON_LINK_MASTER
, &tlink
->tl_flags
);
4388 set_bit(TCON_LINK_IN_TREE
, &tlink
->tl_flags
);
4390 cifs_sb
->master_tlink
= tlink
;
4391 spin_lock(&cifs_sb
->tlink_tree_lock
);
4392 tlink_rb_insert(&cifs_sb
->tlink_tree
, tlink
);
4393 spin_unlock(&cifs_sb
->tlink_tree_lock
);
4395 queue_delayed_work(cifsiod_wq
, &cifs_sb
->prune_tlinks
,
4400 #ifdef CONFIG_CIFS_DFS_UPCALL
4402 * cifs_build_path_to_root returns full path to root when we do not have an
4403 * exiting connection (tcon)
4406 build_unc_path_to_root(const struct smb_vol
*vol
,
4407 const struct cifs_sb_info
*cifs_sb
, bool useppath
)
4409 char *full_path
, *pos
;
4410 unsigned int pplen
= useppath
&& vol
->prepath
?
4411 strlen(vol
->prepath
) + 1 : 0;
4412 unsigned int unc_len
= strnlen(vol
->UNC
, MAX_TREE_SIZE
+ 1);
4414 if (unc_len
> MAX_TREE_SIZE
)
4415 return ERR_PTR(-EINVAL
);
4417 full_path
= kmalloc(unc_len
+ pplen
+ 1, GFP_KERNEL
);
4418 if (full_path
== NULL
)
4419 return ERR_PTR(-ENOMEM
);
4421 memcpy(full_path
, vol
->UNC
, unc_len
);
4422 pos
= full_path
+ unc_len
;
4425 *pos
= CIFS_DIR_SEP(cifs_sb
);
4426 memcpy(pos
+ 1, vol
->prepath
, pplen
);
4430 *pos
= '\0'; /* add trailing null */
4431 convert_delimiter(full_path
, CIFS_DIR_SEP(cifs_sb
));
4432 cifs_dbg(FYI
, "%s: full_path=%s\n", __func__
, full_path
);
4437 * expand_dfs_referral - Perform a dfs referral query and update the cifs_sb
4440 * If a referral is found, cifs_sb->mountdata will be (re-)allocated
4441 * to a string containing updated options for the submount. Otherwise it
4442 * will be left untouched.
4444 * Returns the rc from get_dfs_path to the caller, which can be used to
4445 * determine whether there were referrals.
4448 expand_dfs_referral(const unsigned int xid
, struct cifs_ses
*ses
,
4449 struct smb_vol
*volume_info
, struct cifs_sb_info
*cifs_sb
,
4453 struct dfs_info3_param referral
= {0};
4454 char *full_path
= NULL
, *mdata
= NULL
;
4456 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_DFS
)
4459 full_path
= build_unc_path_to_root(volume_info
, cifs_sb
, true);
4460 if (IS_ERR(full_path
))
4461 return PTR_ERR(full_path
);
4463 rc
= dfs_cache_find(xid
, ses
, cifs_sb
->local_nls
, cifs_remap(cifs_sb
),
4464 ref_path
, &referral
, NULL
);
4466 char *fake_devname
= NULL
;
4468 mdata
= cifs_compose_mount_options(cifs_sb
->mountdata
,
4469 full_path
+ 1, &referral
,
4471 free_dfs_info_param(&referral
);
4473 if (IS_ERR(mdata
)) {
4474 rc
= PTR_ERR(mdata
);
4477 cifs_cleanup_volume_info_contents(volume_info
);
4478 rc
= cifs_setup_volume_info(volume_info
, mdata
,
4479 fake_devname
, false);
4481 kfree(fake_devname
);
4482 kfree(cifs_sb
->mountdata
);
4483 cifs_sb
->mountdata
= mdata
;
4489 static inline int get_next_dfs_tgt(const char *path
,
4490 struct dfs_cache_tgt_list
*tgt_list
,
4491 struct dfs_cache_tgt_iterator
**tgt_it
)
4494 *tgt_it
= dfs_cache_get_tgt_iterator(tgt_list
);
4496 *tgt_it
= dfs_cache_get_next_tgt(tgt_list
, *tgt_it
);
4497 return !*tgt_it
? -EHOSTDOWN
: 0;
4500 static int update_vol_info(const struct dfs_cache_tgt_iterator
*tgt_it
,
4501 struct smb_vol
*fake_vol
, struct smb_vol
*vol
)
4503 const char *tgt
= dfs_cache_get_tgt_name(tgt_it
);
4504 int len
= strlen(tgt
) + 2;
4507 new_unc
= kmalloc(len
, GFP_KERNEL
);
4510 scnprintf(new_unc
, len
, "\\%s", tgt
);
4515 if (fake_vol
->prepath
) {
4516 kfree(vol
->prepath
);
4517 vol
->prepath
= fake_vol
->prepath
;
4518 fake_vol
->prepath
= NULL
;
4520 memcpy(&vol
->dstaddr
, &fake_vol
->dstaddr
, sizeof(vol
->dstaddr
));
4525 static int setup_dfs_tgt_conn(const char *path
, const char *full_path
,
4526 const struct dfs_cache_tgt_iterator
*tgt_it
,
4527 struct cifs_sb_info
*cifs_sb
, struct smb_vol
*vol
, unsigned int *xid
,
4528 struct TCP_Server_Info
**server
, struct cifs_ses
**ses
,
4529 struct cifs_tcon
**tcon
)
4532 struct dfs_info3_param ref
= {0};
4533 char *mdata
= NULL
, *fake_devname
= NULL
;
4534 struct smb_vol fake_vol
= {NULL
};
4536 cifs_dbg(FYI
, "%s: dfs path: %s\n", __func__
, path
);
4538 rc
= dfs_cache_get_tgt_referral(path
, tgt_it
, &ref
);
4542 mdata
= cifs_compose_mount_options(cifs_sb
->mountdata
, full_path
+ 1, &ref
, &fake_devname
);
4543 free_dfs_info_param(&ref
);
4545 if (IS_ERR(mdata
)) {
4546 rc
= PTR_ERR(mdata
);
4549 cifs_dbg(FYI
, "%s: fake_devname: %s\n", __func__
, fake_devname
);
4550 rc
= cifs_setup_volume_info(&fake_vol
, mdata
, fake_devname
,
4554 kfree(fake_devname
);
4558 * We use a 'fake_vol' here because we need pass it down to the
4559 * mount_{get,put} functions to test connection against new DFS
4562 mount_put_conns(cifs_sb
, *xid
, *server
, *ses
, *tcon
);
4563 rc
= mount_get_conns(&fake_vol
, cifs_sb
, xid
, server
, ses
,
4565 if (!rc
|| (*server
&& *ses
)) {
4567 * We were able to connect to new target server.
4568 * Update current volume info with new target server.
4570 rc
= update_vol_info(tgt_it
, &fake_vol
, vol
);
4573 cifs_cleanup_volume_info_contents(&fake_vol
);
4577 static int do_dfs_failover(const char *path
, const char *full_path
, struct cifs_sb_info
*cifs_sb
,
4578 struct smb_vol
*vol
, struct cifs_ses
*root_ses
, unsigned int *xid
,
4579 struct TCP_Server_Info
**server
, struct cifs_ses
**ses
,
4580 struct cifs_tcon
**tcon
)
4583 struct dfs_cache_tgt_list tgt_list
;
4584 struct dfs_cache_tgt_iterator
*tgt_it
= NULL
;
4586 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_DFS
)
4589 rc
= dfs_cache_noreq_find(path
, NULL
, &tgt_list
);
4594 /* Get next DFS target server - if any */
4595 rc
= get_next_dfs_tgt(path
, &tgt_list
, &tgt_it
);
4598 /* Connect to next DFS target */
4599 rc
= setup_dfs_tgt_conn(path
, full_path
, tgt_it
, cifs_sb
, vol
, xid
, server
, ses
,
4601 if (!rc
|| (*server
&& *ses
))
4606 * Update DFS target hint in DFS referral cache with the target
4607 * server we successfully reconnected to.
4609 rc
= dfs_cache_update_tgthint(*xid
, root_ses
? root_ses
: *ses
,
4611 cifs_remap(cifs_sb
), path
,
4614 dfs_cache_free_tgts(&tgt_list
);
4620 cifs_setup_volume_info(struct smb_vol
*volume_info
, char *mount_data
,
4621 const char *devname
, bool is_smb3
)
4625 if (cifs_parse_mount_options(mount_data
, devname
, volume_info
, is_smb3
))
4628 if (volume_info
->nullauth
) {
4629 cifs_dbg(FYI
, "Anonymous login\n");
4630 kfree(volume_info
->username
);
4631 volume_info
->username
= NULL
;
4632 } else if (volume_info
->username
) {
4633 /* BB fixme parse for domain name here */
4634 cifs_dbg(FYI
, "Username: %s\n", volume_info
->username
);
4636 cifs_dbg(VFS
, "No username specified\n");
4637 /* In userspace mount helper we can get user name from alternate
4638 locations such as env variables and files on disk */
4642 /* this is needed for ASCII cp to Unicode converts */
4643 if (volume_info
->iocharset
== NULL
) {
4644 /* load_nls_default cannot return null */
4645 volume_info
->local_nls
= load_nls_default();
4647 volume_info
->local_nls
= load_nls(volume_info
->iocharset
);
4648 if (volume_info
->local_nls
== NULL
) {
4649 cifs_dbg(VFS
, "CIFS mount error: iocharset %s not found\n",
4650 volume_info
->iocharset
);
4659 cifs_get_volume_info(char *mount_data
, const char *devname
, bool is_smb3
)
4662 struct smb_vol
*volume_info
;
4664 volume_info
= kmalloc(sizeof(struct smb_vol
), GFP_KERNEL
);
4666 return ERR_PTR(-ENOMEM
);
4668 rc
= cifs_setup_volume_info(volume_info
, mount_data
, devname
, is_smb3
);
4670 cifs_cleanup_volume_info(volume_info
);
4671 volume_info
= ERR_PTR(rc
);
4678 cifs_are_all_path_components_accessible(struct TCP_Server_Info
*server
,
4680 struct cifs_tcon
*tcon
,
4681 struct cifs_sb_info
*cifs_sb
,
4688 int skip
= added_treename
? 1 : 0;
4690 sep
= CIFS_DIR_SEP(cifs_sb
);
4693 rc
= server
->ops
->is_path_accessible(xid
, tcon
, cifs_sb
, "");
4695 /* skip separators */
4700 /* next separator */
4701 while (*s
&& *s
!= sep
)
4704 * if the treename is added, we then have to skip the first
4705 * part within the separators
4712 * temporarily null-terminate the path at the end of
4713 * the current component
4717 rc
= server
->ops
->is_path_accessible(xid
, tcon
, cifs_sb
,
4725 * Check if path is remote (e.g. a DFS share). Return -EREMOTE if it is,
4728 static int is_path_remote(struct cifs_sb_info
*cifs_sb
, struct smb_vol
*vol
,
4729 const unsigned int xid
,
4730 struct TCP_Server_Info
*server
,
4731 struct cifs_tcon
*tcon
)
4736 if (!server
->ops
->is_path_accessible
)
4740 * cifs_build_path_to_root works only when we have a valid tcon
4742 full_path
= cifs_build_path_to_root(vol
, cifs_sb
, tcon
,
4743 tcon
->Flags
& SMB_SHARE_IS_IN_DFS
);
4744 if (full_path
== NULL
)
4747 cifs_dbg(FYI
, "%s: full_path: %s\n", __func__
, full_path
);
4749 rc
= server
->ops
->is_path_accessible(xid
, tcon
, cifs_sb
,
4751 if (rc
!= 0 && rc
!= -EREMOTE
) {
4756 if (rc
!= -EREMOTE
) {
4757 rc
= cifs_are_all_path_components_accessible(server
, xid
, tcon
,
4758 cifs_sb
, full_path
, tcon
->Flags
& SMB_SHARE_IS_IN_DFS
);
4760 cifs_server_dbg(VFS
, "cannot query dirs between root and final path, enabling CIFS_MOUNT_USE_PREFIX_PATH\n");
4761 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_USE_PREFIX_PATH
;
4770 #ifdef CONFIG_CIFS_DFS_UPCALL
4771 static void set_root_ses(struct cifs_sb_info
*cifs_sb
, struct cifs_ses
*ses
,
4772 struct cifs_ses
**root_ses
)
4775 spin_lock(&cifs_tcp_ses_lock
);
4777 ses
->tcon_ipc
->remap
= cifs_remap(cifs_sb
);
4778 spin_unlock(&cifs_tcp_ses_lock
);
4783 static void put_root_ses(struct cifs_ses
*ses
)
4786 cifs_put_smb_ses(ses
);
4789 /* Check if a path component is remote and then update @dfs_path accordingly */
4790 static int check_dfs_prepath(struct cifs_sb_info
*cifs_sb
, struct smb_vol
*vol
,
4791 const unsigned int xid
, struct TCP_Server_Info
*server
,
4792 struct cifs_tcon
*tcon
, char **dfs_path
)
4795 char sep
= CIFS_DIR_SEP(cifs_sb
), tmp
;
4798 int added_treename
= tcon
->Flags
& SMB_SHARE_IS_IN_DFS
;
4799 int skip
= added_treename
;
4801 path
= cifs_build_path_to_root(vol
, cifs_sb
, tcon
, added_treename
);
4806 * Walk through the path components in @path and check if they're accessible. In case any of
4807 * the components is -EREMOTE, then update @dfs_path with the next DFS referral request path
4808 * (NOT including the remaining components).
4812 /* skip separators */
4813 while (*s
&& *s
== sep
)
4817 /* next separator */
4818 while (*s
&& *s
!= sep
)
4821 * if the treename is added, we then have to skip the first
4822 * part within the separators
4830 rc
= server
->ops
->is_path_accessible(xid
, tcon
, cifs_sb
, path
);
4831 if (rc
&& rc
== -EREMOTE
) {
4832 struct smb_vol v
= {NULL
};
4833 /* if @path contains a tree name, skip it in the prefix path */
4834 if (added_treename
) {
4835 rc
= cifs_parse_devname(path
, &v
);
4839 npath
= build_unc_path_to_root(&v
, cifs_sb
, true);
4840 cifs_cleanup_volume_info_contents(&v
);
4843 v
.prepath
= path
+ 1;
4844 npath
= build_unc_path_to_root(&v
, cifs_sb
, true);
4846 if (IS_ERR(npath
)) {
4847 rc
= PTR_ERR(npath
);
4860 int cifs_mount(struct cifs_sb_info
*cifs_sb
, struct smb_vol
*vol
)
4864 struct TCP_Server_Info
*server
= NULL
;
4865 struct cifs_ses
*ses
= NULL
, *root_ses
= NULL
;
4866 struct cifs_tcon
*tcon
= NULL
;
4868 char *ref_path
= NULL
, *full_path
= NULL
;
4869 char *oldmnt
= NULL
;
4870 char *mntdata
= NULL
;
4872 rc
= mount_get_conns(vol
, cifs_sb
, &xid
, &server
, &ses
, &tcon
);
4874 * Unconditionally try to get an DFS referral (even cached) to determine whether it is an
4877 * Skip prefix path to provide support for DFS referrals from w2k8 servers which don't seem
4878 * to respond with PATH_NOT_COVERED to requests that include the prefix.
4880 if (dfs_cache_find(xid
, ses
, cifs_sb
->local_nls
, cifs_remap(cifs_sb
), vol
->UNC
+ 1, NULL
,
4882 /* No DFS referral was returned. Looks like a regular share. */
4885 /* Check if it is fully accessible and then mount it */
4886 rc
= is_path_remote(cifs_sb
, vol
, xid
, server
, tcon
);
4892 /* Save mount options */
4893 mntdata
= kstrndup(cifs_sb
->mountdata
, strlen(cifs_sb
->mountdata
), GFP_KERNEL
);
4898 /* Get path of DFS root */
4899 ref_path
= build_unc_path_to_root(vol
, cifs_sb
, false);
4900 if (IS_ERR(ref_path
)) {
4901 rc
= PTR_ERR(ref_path
);
4906 set_root_ses(cifs_sb
, ses
, &root_ses
);
4908 /* Save full path of last DFS path we used to resolve final target server */
4910 full_path
= build_unc_path_to_root(vol
, cifs_sb
, !!count
);
4911 if (IS_ERR(full_path
)) {
4912 rc
= PTR_ERR(full_path
);
4916 /* Chase referral */
4917 oldmnt
= cifs_sb
->mountdata
;
4918 rc
= expand_dfs_referral(xid
, root_ses
, vol
, cifs_sb
, ref_path
+ 1);
4921 /* Connect to new DFS target only if we were redirected */
4922 if (oldmnt
!= cifs_sb
->mountdata
) {
4923 mount_put_conns(cifs_sb
, xid
, server
, ses
, tcon
);
4924 rc
= mount_get_conns(vol
, cifs_sb
, &xid
, &server
, &ses
, &tcon
);
4926 if (rc
&& !server
&& !ses
) {
4927 /* Failed to connect. Try to connect to other targets in the referral. */
4928 rc
= do_dfs_failover(ref_path
+ 1, full_path
, cifs_sb
, vol
, root_ses
, &xid
,
4929 &server
, &ses
, &tcon
);
4931 if (rc
== -EACCES
|| rc
== -EOPNOTSUPP
|| !server
|| !ses
)
4935 /* Make sure that requests go through new root servers */
4936 if (is_tcon_dfs(tcon
)) {
4937 put_root_ses(root_ses
);
4938 set_root_ses(cifs_sb
, ses
, &root_ses
);
4940 /* Check for remaining path components and then continue chasing them (-EREMOTE) */
4941 rc
= check_dfs_prepath(cifs_sb
, vol
, xid
, server
, tcon
, &ref_path
);
4942 /* Prevent recursion on broken link referrals */
4943 if (rc
== -EREMOTE
&& ++count
> MAX_NESTED_LINKS
)
4945 } while (rc
== -EREMOTE
);
4949 put_root_ses(root_ses
);
4954 * Store DFS full path in both superblock and tree connect structures.
4956 * For DFS root mounts, the prefix path (cifs_sb->prepath) is preserved during reconnect so
4957 * only the root path is set in cifs_sb->origin_fullpath and tcon->dfs_path. And for DFS
4958 * links, the prefix path is included in both and may be changed during reconnect. See
4959 * cifs_tree_connect().
4961 cifs_sb
->origin_fullpath
= kstrndup(full_path
, strlen(full_path
), GFP_KERNEL
);
4962 if (!cifs_sb
->origin_fullpath
) {
4966 spin_lock(&cifs_tcp_ses_lock
);
4967 tcon
->dfs_path
= full_path
;
4969 tcon
->remap
= cifs_remap(cifs_sb
);
4970 spin_unlock(&cifs_tcp_ses_lock
);
4972 /* Add original volume information for DFS cache to be used when refreshing referrals */
4973 rc
= dfs_cache_add_vol(mntdata
, vol
, cifs_sb
->origin_fullpath
);
4977 * After reconnecting to a different server, unique ids won't
4978 * match anymore, so we disable serverino. This prevents
4979 * dentry revalidation to think the dentry are stale (ESTALE).
4981 cifs_autodisable_serverino(cifs_sb
);
4983 * Force the use of prefix path to support failover on DFS paths that
4984 * resolve to targets that have different prefix paths.
4986 cifs_sb
->mnt_cifs_flags
|= CIFS_MOUNT_USE_PREFIX_PATH
;
4987 kfree(cifs_sb
->prepath
);
4988 cifs_sb
->prepath
= vol
->prepath
;
4989 vol
->prepath
= NULL
;
4993 cifs_try_adding_channels(ses
);
4994 return mount_setup_tlink(cifs_sb
, ses
, tcon
);
5000 kfree(cifs_sb
->origin_fullpath
);
5001 put_root_ses(root_ses
);
5002 mount_put_conns(cifs_sb
, xid
, server
, ses
, tcon
);
5006 int cifs_mount(struct cifs_sb_info
*cifs_sb
, struct smb_vol
*vol
)
5010 struct cifs_ses
*ses
;
5011 struct cifs_tcon
*tcon
;
5012 struct TCP_Server_Info
*server
;
5014 rc
= mount_get_conns(vol
, cifs_sb
, &xid
, &server
, &ses
, &tcon
);
5019 rc
= is_path_remote(cifs_sb
, vol
, xid
, server
, tcon
);
5028 return mount_setup_tlink(cifs_sb
, ses
, tcon
);
5031 mount_put_conns(cifs_sb
, xid
, server
, ses
, tcon
);
5037 * Issue a TREE_CONNECT request.
5040 CIFSTCon(const unsigned int xid
, struct cifs_ses
*ses
,
5041 const char *tree
, struct cifs_tcon
*tcon
,
5042 const struct nls_table
*nls_codepage
)
5044 struct smb_hdr
*smb_buffer
;
5045 struct smb_hdr
*smb_buffer_response
;
5048 unsigned char *bcc_ptr
;
5051 __u16 bytes_left
, count
;
5056 smb_buffer
= cifs_buf_get();
5057 if (smb_buffer
== NULL
)
5060 smb_buffer_response
= smb_buffer
;
5062 header_assemble(smb_buffer
, SMB_COM_TREE_CONNECT_ANDX
,
5063 NULL
/*no tid */ , 4 /*wct */ );
5065 smb_buffer
->Mid
= get_next_mid(ses
->server
);
5066 smb_buffer
->Uid
= ses
->Suid
;
5067 pSMB
= (TCONX_REQ
*) smb_buffer
;
5068 pSMBr
= (TCONX_RSP
*) smb_buffer_response
;
5070 pSMB
->AndXCommand
= 0xFF;
5071 pSMB
->Flags
= cpu_to_le16(TCON_EXTENDED_SECINFO
);
5072 bcc_ptr
= &pSMB
->Password
[0];
5073 if (tcon
->pipe
|| (ses
->server
->sec_mode
& SECMODE_USER
)) {
5074 pSMB
->PasswordLength
= cpu_to_le16(1); /* minimum */
5075 *bcc_ptr
= 0; /* password is null byte */
5076 bcc_ptr
++; /* skip password */
5077 /* already aligned so no need to do it below */
5079 pSMB
->PasswordLength
= cpu_to_le16(CIFS_AUTH_RESP_SIZE
);
5080 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
5081 specified as required (when that support is added to
5082 the vfs in the future) as only NTLM or the much
5083 weaker LANMAN (which we do not send by default) is accepted
5084 by Samba (not sure whether other servers allow
5085 NTLMv2 password here) */
5086 #ifdef CONFIG_CIFS_WEAK_PW_HASH
5087 if ((global_secflags
& CIFSSEC_MAY_LANMAN
) &&
5088 (ses
->sectype
== LANMAN
))
5089 calc_lanman_hash(tcon
->password
, ses
->server
->cryptkey
,
5090 ses
->server
->sec_mode
&
5091 SECMODE_PW_ENCRYPT
? true : false,
5094 #endif /* CIFS_WEAK_PW_HASH */
5095 rc
= SMBNTencrypt(tcon
->password
, ses
->server
->cryptkey
,
5096 bcc_ptr
, nls_codepage
);
5098 cifs_dbg(FYI
, "%s Can't generate NTLM rsp. Error: %d\n",
5100 cifs_buf_release(smb_buffer
);
5104 bcc_ptr
+= CIFS_AUTH_RESP_SIZE
;
5105 if (ses
->capabilities
& CAP_UNICODE
) {
5106 /* must align unicode strings */
5107 *bcc_ptr
= 0; /* null byte password */
5112 if (ses
->server
->sign
)
5113 smb_buffer
->Flags2
|= SMBFLG2_SECURITY_SIGNATURE
;
5115 if (ses
->capabilities
& CAP_STATUS32
) {
5116 smb_buffer
->Flags2
|= SMBFLG2_ERR_STATUS
;
5118 if (ses
->capabilities
& CAP_DFS
) {
5119 smb_buffer
->Flags2
|= SMBFLG2_DFS
;
5121 if (ses
->capabilities
& CAP_UNICODE
) {
5122 smb_buffer
->Flags2
|= SMBFLG2_UNICODE
;
5124 cifs_strtoUTF16((__le16
*) bcc_ptr
, tree
,
5125 6 /* max utf8 char length in bytes */ *
5126 (/* server len*/ + 256 /* share len */), nls_codepage
);
5127 bcc_ptr
+= 2 * length
; /* convert num 16 bit words to bytes */
5128 bcc_ptr
+= 2; /* skip trailing null */
5129 } else { /* ASCII */
5130 strcpy(bcc_ptr
, tree
);
5131 bcc_ptr
+= strlen(tree
) + 1;
5133 strcpy(bcc_ptr
, "?????");
5134 bcc_ptr
+= strlen("?????");
5136 count
= bcc_ptr
- &pSMB
->Password
[0];
5137 be32_add_cpu(&pSMB
->hdr
.smb_buf_length
, count
);
5138 pSMB
->ByteCount
= cpu_to_le16(count
);
5140 rc
= SendReceive(xid
, ses
, smb_buffer
, smb_buffer_response
, &length
,
5143 /* above now done in SendReceive */
5147 tcon
->tidStatus
= CifsGood
;
5148 tcon
->need_reconnect
= false;
5149 tcon
->tid
= smb_buffer_response
->Tid
;
5150 bcc_ptr
= pByteArea(smb_buffer_response
);
5151 bytes_left
= get_bcc(smb_buffer_response
);
5152 length
= strnlen(bcc_ptr
, bytes_left
- 2);
5153 if (smb_buffer
->Flags2
& SMBFLG2_UNICODE
)
5159 /* skip service field (NB: this field is always ASCII) */
5161 if ((bcc_ptr
[0] == 'I') && (bcc_ptr
[1] == 'P') &&
5162 (bcc_ptr
[2] == 'C')) {
5163 cifs_dbg(FYI
, "IPC connection\n");
5167 } else if (length
== 2) {
5168 if ((bcc_ptr
[0] == 'A') && (bcc_ptr
[1] == ':')) {
5169 /* the most common case */
5170 cifs_dbg(FYI
, "disk share connection\n");
5173 bcc_ptr
+= length
+ 1;
5174 bytes_left
-= (length
+ 1);
5175 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
5177 /* mostly informational -- no need to fail on error here */
5178 kfree(tcon
->nativeFileSystem
);
5179 tcon
->nativeFileSystem
= cifs_strndup_from_utf16(bcc_ptr
,
5180 bytes_left
, is_unicode
,
5183 cifs_dbg(FYI
, "nativeFileSystem=%s\n", tcon
->nativeFileSystem
);
5185 if ((smb_buffer_response
->WordCount
== 3) ||
5186 (smb_buffer_response
->WordCount
== 7))
5187 /* field is in same location */
5188 tcon
->Flags
= le16_to_cpu(pSMBr
->OptionalSupport
);
5191 cifs_dbg(FYI
, "Tcon flags: 0x%x\n", tcon
->Flags
);
5194 cifs_buf_release(smb_buffer
);
5198 static void delayed_free(struct rcu_head
*p
)
5200 struct cifs_sb_info
*sbi
= container_of(p
, struct cifs_sb_info
, rcu
);
5201 unload_nls(sbi
->local_nls
);
5206 cifs_umount(struct cifs_sb_info
*cifs_sb
)
5208 struct rb_root
*root
= &cifs_sb
->tlink_tree
;
5209 struct rb_node
*node
;
5210 struct tcon_link
*tlink
;
5212 cancel_delayed_work_sync(&cifs_sb
->prune_tlinks
);
5214 spin_lock(&cifs_sb
->tlink_tree_lock
);
5215 while ((node
= rb_first(root
))) {
5216 tlink
= rb_entry(node
, struct tcon_link
, tl_rbnode
);
5217 cifs_get_tlink(tlink
);
5218 clear_bit(TCON_LINK_IN_TREE
, &tlink
->tl_flags
);
5219 rb_erase(node
, root
);
5221 spin_unlock(&cifs_sb
->tlink_tree_lock
);
5222 cifs_put_tlink(tlink
);
5223 spin_lock(&cifs_sb
->tlink_tree_lock
);
5225 spin_unlock(&cifs_sb
->tlink_tree_lock
);
5227 kfree(cifs_sb
->mountdata
);
5228 kfree(cifs_sb
->prepath
);
5229 #ifdef CONFIG_CIFS_DFS_UPCALL
5230 dfs_cache_del_vol(cifs_sb
->origin_fullpath
);
5231 kfree(cifs_sb
->origin_fullpath
);
5233 call_rcu(&cifs_sb
->rcu
, delayed_free
);
5237 cifs_negotiate_protocol(const unsigned int xid
, struct cifs_ses
*ses
)
5240 struct TCP_Server_Info
*server
= cifs_ses_server(ses
);
5242 if (!server
->ops
->need_neg
|| !server
->ops
->negotiate
)
5245 /* only send once per connect */
5246 if (!server
->ops
->need_neg(server
))
5249 rc
= server
->ops
->negotiate(xid
, ses
);
5251 spin_lock(&GlobalMid_Lock
);
5252 if (server
->tcpStatus
== CifsNeedNegotiate
)
5253 server
->tcpStatus
= CifsGood
;
5256 spin_unlock(&GlobalMid_Lock
);
5263 cifs_setup_session(const unsigned int xid
, struct cifs_ses
*ses
,
5264 struct nls_table
*nls_info
)
5267 struct TCP_Server_Info
*server
= cifs_ses_server(ses
);
5269 if (!ses
->binding
) {
5270 ses
->capabilities
= server
->capabilities
;
5271 if (linuxExtEnabled
== 0)
5272 ses
->capabilities
&= (~server
->vals
->cap_unix
);
5274 if (ses
->auth_key
.response
) {
5275 cifs_dbg(FYI
, "Free previous auth_key.response = %p\n",
5276 ses
->auth_key
.response
);
5277 kfree(ses
->auth_key
.response
);
5278 ses
->auth_key
.response
= NULL
;
5279 ses
->auth_key
.len
= 0;
5283 cifs_dbg(FYI
, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n",
5284 server
->sec_mode
, server
->capabilities
, server
->timeAdj
);
5286 if (server
->ops
->sess_setup
)
5287 rc
= server
->ops
->sess_setup(xid
, ses
, nls_info
);
5290 cifs_server_dbg(VFS
, "Send error in SessSetup = %d\n", rc
);
5296 cifs_set_vol_auth(struct smb_vol
*vol
, struct cifs_ses
*ses
)
5298 vol
->sectype
= ses
->sectype
;
5300 /* krb5 is special, since we don't need username or pw */
5301 if (vol
->sectype
== Kerberos
)
5304 return cifs_set_cifscreds(vol
, ses
);
5307 static struct cifs_tcon
*
5308 cifs_construct_tcon(struct cifs_sb_info
*cifs_sb
, kuid_t fsuid
)
5311 struct cifs_tcon
*master_tcon
= cifs_sb_master_tcon(cifs_sb
);
5312 struct cifs_ses
*ses
;
5313 struct cifs_tcon
*tcon
= NULL
;
5314 struct smb_vol
*vol_info
;
5316 vol_info
= kzalloc(sizeof(*vol_info
), GFP_KERNEL
);
5317 if (vol_info
== NULL
)
5318 return ERR_PTR(-ENOMEM
);
5320 vol_info
->local_nls
= cifs_sb
->local_nls
;
5321 vol_info
->linux_uid
= fsuid
;
5322 vol_info
->cred_uid
= fsuid
;
5323 vol_info
->UNC
= master_tcon
->treeName
;
5324 vol_info
->retry
= master_tcon
->retry
;
5325 vol_info
->nocase
= master_tcon
->nocase
;
5326 vol_info
->nohandlecache
= master_tcon
->nohandlecache
;
5327 vol_info
->local_lease
= master_tcon
->local_lease
;
5328 vol_info
->no_lease
= master_tcon
->no_lease
;
5329 vol_info
->resilient
= master_tcon
->use_resilient
;
5330 vol_info
->persistent
= master_tcon
->use_persistent
;
5331 vol_info
->handle_timeout
= master_tcon
->handle_timeout
;
5332 vol_info
->no_linux_ext
= !master_tcon
->unix_ext
;
5333 vol_info
->linux_ext
= master_tcon
->posix_extensions
;
5334 vol_info
->sectype
= master_tcon
->ses
->sectype
;
5335 vol_info
->sign
= master_tcon
->ses
->sign
;
5336 vol_info
->seal
= master_tcon
->seal
;
5338 rc
= cifs_set_vol_auth(vol_info
, master_tcon
->ses
);
5344 /* get a reference for the same TCP session */
5345 spin_lock(&cifs_tcp_ses_lock
);
5346 ++master_tcon
->ses
->server
->srv_count
;
5347 spin_unlock(&cifs_tcp_ses_lock
);
5349 ses
= cifs_get_smb_ses(master_tcon
->ses
->server
, vol_info
);
5351 tcon
= (struct cifs_tcon
*)ses
;
5352 cifs_put_tcp_session(master_tcon
->ses
->server
, 0);
5356 tcon
= cifs_get_tcon(ses
, vol_info
);
5358 cifs_put_smb_ses(ses
);
5363 reset_cifs_unix_caps(0, tcon
, NULL
, vol_info
);
5366 kfree(vol_info
->username
);
5367 kfree_sensitive(vol_info
->password
);
5374 cifs_sb_master_tcon(struct cifs_sb_info
*cifs_sb
)
5376 return tlink_tcon(cifs_sb_master_tlink(cifs_sb
));
5379 /* find and return a tlink with given uid */
5380 static struct tcon_link
*
5381 tlink_rb_search(struct rb_root
*root
, kuid_t uid
)
5383 struct rb_node
*node
= root
->rb_node
;
5384 struct tcon_link
*tlink
;
5387 tlink
= rb_entry(node
, struct tcon_link
, tl_rbnode
);
5389 if (uid_gt(tlink
->tl_uid
, uid
))
5390 node
= node
->rb_left
;
5391 else if (uid_lt(tlink
->tl_uid
, uid
))
5392 node
= node
->rb_right
;
5399 /* insert a tcon_link into the tree */
5401 tlink_rb_insert(struct rb_root
*root
, struct tcon_link
*new_tlink
)
5403 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
5404 struct tcon_link
*tlink
;
5407 tlink
= rb_entry(*new, struct tcon_link
, tl_rbnode
);
5410 if (uid_gt(tlink
->tl_uid
, new_tlink
->tl_uid
))
5411 new = &((*new)->rb_left
);
5413 new = &((*new)->rb_right
);
5416 rb_link_node(&new_tlink
->tl_rbnode
, parent
, new);
5417 rb_insert_color(&new_tlink
->tl_rbnode
, root
);
5421 * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the
5424 * If the superblock doesn't refer to a multiuser mount, then just return
5425 * the master tcon for the mount.
5427 * First, search the rbtree for an existing tcon for this fsuid. If one
5428 * exists, then check to see if it's pending construction. If it is then wait
5429 * for construction to complete. Once it's no longer pending, check to see if
5430 * it failed and either return an error or retry construction, depending on
5433 * If one doesn't exist then insert a new tcon_link struct into the tree and
5434 * try to construct a new one.
5437 cifs_sb_tlink(struct cifs_sb_info
*cifs_sb
)
5440 kuid_t fsuid
= current_fsuid();
5441 struct tcon_link
*tlink
, *newtlink
;
5443 if (!(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MULTIUSER
))
5444 return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb
));
5446 spin_lock(&cifs_sb
->tlink_tree_lock
);
5447 tlink
= tlink_rb_search(&cifs_sb
->tlink_tree
, fsuid
);
5449 cifs_get_tlink(tlink
);
5450 spin_unlock(&cifs_sb
->tlink_tree_lock
);
5452 if (tlink
== NULL
) {
5453 newtlink
= kzalloc(sizeof(*tlink
), GFP_KERNEL
);
5454 if (newtlink
== NULL
)
5455 return ERR_PTR(-ENOMEM
);
5456 newtlink
->tl_uid
= fsuid
;
5457 newtlink
->tl_tcon
= ERR_PTR(-EACCES
);
5458 set_bit(TCON_LINK_PENDING
, &newtlink
->tl_flags
);
5459 set_bit(TCON_LINK_IN_TREE
, &newtlink
->tl_flags
);
5460 cifs_get_tlink(newtlink
);
5462 spin_lock(&cifs_sb
->tlink_tree_lock
);
5463 /* was one inserted after previous search? */
5464 tlink
= tlink_rb_search(&cifs_sb
->tlink_tree
, fsuid
);
5466 cifs_get_tlink(tlink
);
5467 spin_unlock(&cifs_sb
->tlink_tree_lock
);
5469 goto wait_for_construction
;
5472 tlink_rb_insert(&cifs_sb
->tlink_tree
, tlink
);
5473 spin_unlock(&cifs_sb
->tlink_tree_lock
);
5475 wait_for_construction
:
5476 ret
= wait_on_bit(&tlink
->tl_flags
, TCON_LINK_PENDING
,
5477 TASK_INTERRUPTIBLE
);
5479 cifs_put_tlink(tlink
);
5480 return ERR_PTR(-ERESTARTSYS
);
5483 /* if it's good, return it */
5484 if (!IS_ERR(tlink
->tl_tcon
))
5487 /* return error if we tried this already recently */
5488 if (time_before(jiffies
, tlink
->tl_time
+ TLINK_ERROR_EXPIRE
)) {
5489 cifs_put_tlink(tlink
);
5490 return ERR_PTR(-EACCES
);
5493 if (test_and_set_bit(TCON_LINK_PENDING
, &tlink
->tl_flags
))
5494 goto wait_for_construction
;
5497 tlink
->tl_tcon
= cifs_construct_tcon(cifs_sb
, fsuid
);
5498 clear_bit(TCON_LINK_PENDING
, &tlink
->tl_flags
);
5499 wake_up_bit(&tlink
->tl_flags
, TCON_LINK_PENDING
);
5501 if (IS_ERR(tlink
->tl_tcon
)) {
5502 cifs_put_tlink(tlink
);
5503 return ERR_PTR(-EACCES
);
5510 * periodic workqueue job that scans tcon_tree for a superblock and closes
5514 cifs_prune_tlinks(struct work_struct
*work
)
5516 struct cifs_sb_info
*cifs_sb
= container_of(work
, struct cifs_sb_info
,
5518 struct rb_root
*root
= &cifs_sb
->tlink_tree
;
5519 struct rb_node
*node
;
5520 struct rb_node
*tmp
;
5521 struct tcon_link
*tlink
;
5524 * Because we drop the spinlock in the loop in order to put the tlink
5525 * it's not guarded against removal of links from the tree. The only
5526 * places that remove entries from the tree are this function and
5527 * umounts. Because this function is non-reentrant and is canceled
5528 * before umount can proceed, this is safe.
5530 spin_lock(&cifs_sb
->tlink_tree_lock
);
5531 node
= rb_first(root
);
5532 while (node
!= NULL
) {
5534 node
= rb_next(tmp
);
5535 tlink
= rb_entry(tmp
, struct tcon_link
, tl_rbnode
);
5537 if (test_bit(TCON_LINK_MASTER
, &tlink
->tl_flags
) ||
5538 atomic_read(&tlink
->tl_count
) != 0 ||
5539 time_after(tlink
->tl_time
+ TLINK_IDLE_EXPIRE
, jiffies
))
5542 cifs_get_tlink(tlink
);
5543 clear_bit(TCON_LINK_IN_TREE
, &tlink
->tl_flags
);
5544 rb_erase(tmp
, root
);
5546 spin_unlock(&cifs_sb
->tlink_tree_lock
);
5547 cifs_put_tlink(tlink
);
5548 spin_lock(&cifs_sb
->tlink_tree_lock
);
5550 spin_unlock(&cifs_sb
->tlink_tree_lock
);
5552 queue_delayed_work(cifsiod_wq
, &cifs_sb
->prune_tlinks
,
5556 #ifdef CONFIG_CIFS_DFS_UPCALL
5557 int cifs_tree_connect(const unsigned int xid
, struct cifs_tcon
*tcon
, const struct nls_table
*nlsc
)
5560 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
5561 const struct smb_version_operations
*ops
= server
->ops
;
5562 struct dfs_cache_tgt_list tl
;
5563 struct dfs_cache_tgt_iterator
*it
= NULL
;
5565 const char *tcp_host
;
5566 size_t tcp_host_len
;
5567 const char *dfs_host
;
5568 size_t dfs_host_len
;
5569 char *share
= NULL
, *prefix
= NULL
;
5570 struct dfs_info3_param ref
= {0};
5573 tree
= kzalloc(MAX_TREE_SIZE
, GFP_KERNEL
);
5577 if (!tcon
->dfs_path
) {
5579 scnprintf(tree
, MAX_TREE_SIZE
, "\\\\%s\\IPC$", server
->hostname
);
5580 rc
= ops
->tree_connect(xid
, tcon
->ses
, tree
, tcon
, nlsc
);
5582 rc
= ops
->tree_connect(xid
, tcon
->ses
, tcon
->treeName
, tcon
, nlsc
);
5587 rc
= dfs_cache_noreq_find(tcon
->dfs_path
+ 1, &ref
, &tl
);
5590 isroot
= ref
.server_type
== DFS_TYPE_ROOT
;
5591 free_dfs_info_param(&ref
);
5593 extract_unc_hostname(server
->hostname
, &tcp_host
, &tcp_host_len
);
5595 for (it
= dfs_cache_get_tgt_iterator(&tl
); it
; it
= dfs_cache_get_next_tgt(&tl
, it
)) {
5603 rc
= dfs_cache_get_tgt_share(tcon
->dfs_path
+ 1, it
, &share
, &prefix
);
5605 cifs_dbg(VFS
, "%s: failed to parse target share %d\n",
5610 extract_unc_hostname(share
, &dfs_host
, &dfs_host_len
);
5612 if (dfs_host_len
!= tcp_host_len
5613 || strncasecmp(dfs_host
, tcp_host
, dfs_host_len
) != 0) {
5614 cifs_dbg(FYI
, "%s: %.*s doesn't match %.*s\n", __func__
, (int)dfs_host_len
,
5615 dfs_host
, (int)tcp_host_len
, tcp_host
);
5617 rc
= match_target_ip(server
, dfs_host
, dfs_host_len
, &target_match
);
5619 cifs_dbg(VFS
, "%s: failed to match target ip: %d\n", __func__
, rc
);
5623 if (!target_match
) {
5624 cifs_dbg(FYI
, "%s: skipping target\n", __func__
);
5630 scnprintf(tree
, MAX_TREE_SIZE
, "\\\\%s\\IPC$", share
);
5631 rc
= ops
->tree_connect(xid
, tcon
->ses
, tree
, tcon
, nlsc
);
5633 scnprintf(tree
, MAX_TREE_SIZE
, "\\%s", share
);
5634 rc
= ops
->tree_connect(xid
, tcon
->ses
, tree
, tcon
, nlsc
);
5635 /* Only handle prefix paths of DFS link targets */
5636 if (!rc
&& !isroot
) {
5637 rc
= update_super_prepath(tcon
, prefix
);
5650 rc
= dfs_cache_noreq_update_tgthint(tcon
->dfs_path
+ 1, it
);
5654 dfs_cache_free_tgts(&tl
);
5660 int cifs_tree_connect(const unsigned int xid
, struct cifs_tcon
*tcon
, const struct nls_table
*nlsc
)
5662 const struct smb_version_operations
*ops
= tcon
->ses
->server
->ops
;
5664 return ops
->tree_connect(xid
, tcon
->ses
, tcon
->treeName
, tcon
, nlsc
);