4 * Copyright (C) International Business Machines Corp., 2002,2011
5 * Author(s): Steve French (sfrench@us.ibm.com)
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include <linux/net.h>
23 #include <linux/string.h>
24 #include <linux/list.h>
25 #include <linux/wait.h>
26 #include <linux/slab.h>
27 #include <linux/pagemap.h>
28 #include <linux/ctype.h>
29 #include <linux/utsname.h>
30 #include <linux/mempool.h>
31 #include <linux/delay.h>
32 #include <linux/completion.h>
33 #include <linux/kthread.h>
34 #include <linux/pagevec.h>
35 #include <linux/freezer.h>
36 #include <linux/namei.h>
37 #include <asm/uaccess.h>
38 #include <asm/processor.h>
39 #include <linux/inet.h>
40 #include <linux/module.h>
41 #include <keys/user-type.h>
43 #include <linux/parser.h>
47 #include "cifsproto.h"
48 #include "cifs_unicode.h"
49 #include "cifs_debug.h"
50 #include "cifs_fs_sb.h"
53 #include "rfc1002pdu.h"
57 #define RFC1001_PORT 139
59 extern mempool_t *cifs_req_poolp;
61 /* FIXME: should these be tunable? */
62 #define TLINK_ERROR_EXPIRE (1 * HZ)
63 #define TLINK_IDLE_EXPIRE (600 * HZ)
66 /* Mount options that take no arguments */
67 Opt_user_xattr, Opt_nouser_xattr,
68 Opt_forceuid, Opt_noforceuid,
69 Opt_forcegid, Opt_noforcegid,
70 Opt_noblocksend, Opt_noautotune,
71 Opt_hard, Opt_soft, Opt_perm, Opt_noperm,
72 Opt_mapposix, Opt_nomapposix,
73 Opt_mapchars, Opt_nomapchars, Opt_sfu,
74 Opt_nosfu, Opt_nodfs, Opt_posixpaths,
75 Opt_noposixpaths, Opt_nounix,
78 Opt_forcemandatorylock, Opt_setuidfromacl, Opt_setuids,
79 Opt_nosetuids, Opt_dynperm, Opt_nodynperm,
80 Opt_nohard, Opt_nosoft,
82 Opt_nostrictsync, Opt_strictsync,
83 Opt_serverino, Opt_noserverino,
84 Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl,
85 Opt_acl, Opt_noacl, Opt_locallease,
86 Opt_sign, Opt_seal, Opt_noac,
87 Opt_fsc, Opt_mfsymlinks,
88 Opt_multiuser, Opt_sloppy, Opt_nosharesock,
89 Opt_persistent, Opt_nopersistent,
90 Opt_resilient, Opt_noresilient,
92 /* Mount options which take numeric value */
93 Opt_backupuid, Opt_backupgid, Opt_uid,
94 Opt_cruid, Opt_gid, Opt_file_mode,
95 Opt_dirmode, Opt_port,
96 Opt_rsize, Opt_wsize, Opt_actimeo,
97 Opt_echo_interval, Opt_max_credits,
99 /* Mount options which take string value */
100 Opt_user, Opt_pass, Opt_ip,
101 Opt_domain, Opt_srcaddr, Opt_iocharset,
102 Opt_netbiosname, Opt_servern,
103 Opt_ver, Opt_vers, Opt_sec, Opt_cache,
105 /* Mount options to be ignored */
108 /* Options which could be blank */
116 static const match_table_t cifs_mount_option_tokens = {
118 { Opt_user_xattr, "user_xattr" },
119 { Opt_nouser_xattr, "nouser_xattr" },
120 { Opt_forceuid, "forceuid" },
121 { Opt_noforceuid, "noforceuid" },
122 { Opt_forcegid, "forcegid" },
123 { Opt_noforcegid, "noforcegid" },
124 { Opt_noblocksend, "noblocksend" },
125 { Opt_noautotune, "noautotune" },
126 { Opt_hard, "hard" },
127 { Opt_soft, "soft" },
128 { Opt_perm, "perm" },
129 { Opt_noperm, "noperm" },
130 { Opt_mapchars, "mapchars" }, /* SFU style */
131 { Opt_nomapchars, "nomapchars" },
132 { Opt_mapposix, "mapposix" }, /* SFM style */
133 { Opt_nomapposix, "nomapposix" },
135 { Opt_nosfu, "nosfu" },
136 { Opt_nodfs, "nodfs" },
137 { Opt_posixpaths, "posixpaths" },
138 { Opt_noposixpaths, "noposixpaths" },
139 { Opt_nounix, "nounix" },
140 { Opt_nounix, "nolinux" },
141 { Opt_nocase, "nocase" },
142 { Opt_nocase, "ignorecase" },
144 { Opt_nobrl, "nobrl" },
145 { Opt_nobrl, "nolock" },
146 { Opt_forcemandatorylock, "forcemandatorylock" },
147 { Opt_forcemandatorylock, "forcemand" },
148 { Opt_setuids, "setuids" },
149 { Opt_nosetuids, "nosetuids" },
150 { Opt_setuidfromacl, "idsfromsid" },
151 { Opt_dynperm, "dynperm" },
152 { Opt_nodynperm, "nodynperm" },
153 { Opt_nohard, "nohard" },
154 { Opt_nosoft, "nosoft" },
155 { Opt_nointr, "nointr" },
156 { Opt_intr, "intr" },
157 { Opt_nostrictsync, "nostrictsync" },
158 { Opt_strictsync, "strictsync" },
159 { Opt_serverino, "serverino" },
160 { Opt_noserverino, "noserverino" },
161 { Opt_rwpidforward, "rwpidforward" },
162 { Opt_cifsacl, "cifsacl" },
163 { Opt_nocifsacl, "nocifsacl" },
165 { Opt_noacl, "noacl" },
166 { Opt_locallease, "locallease" },
167 { Opt_sign, "sign" },
168 { Opt_seal, "seal" },
169 { Opt_noac, "noac" },
171 { Opt_mfsymlinks, "mfsymlinks" },
172 { Opt_multiuser, "multiuser" },
173 { Opt_sloppy, "sloppy" },
174 { Opt_nosharesock, "nosharesock" },
175 { Opt_persistent, "persistenthandles"},
176 { Opt_nopersistent, "nopersistenthandles"},
177 { Opt_resilient, "resilienthandles"},
178 { Opt_noresilient, "noresilienthandles"},
180 { Opt_backupuid, "backupuid=%s" },
181 { Opt_backupgid, "backupgid=%s" },
182 { Opt_uid, "uid=%s" },
183 { Opt_cruid, "cruid=%s" },
184 { Opt_gid, "gid=%s" },
185 { Opt_file_mode, "file_mode=%s" },
186 { Opt_dirmode, "dirmode=%s" },
187 { Opt_dirmode, "dir_mode=%s" },
188 { Opt_port, "port=%s" },
189 { Opt_rsize, "rsize=%s" },
190 { Opt_wsize, "wsize=%s" },
191 { Opt_actimeo, "actimeo=%s" },
192 { Opt_echo_interval, "echo_interval=%s" },
193 { Opt_max_credits, "max_credits=%s" },
195 { Opt_blank_user, "user=" },
196 { Opt_blank_user, "username=" },
197 { Opt_user, "user=%s" },
198 { Opt_user, "username=%s" },
199 { Opt_blank_pass, "pass=" },
200 { Opt_blank_pass, "password=" },
201 { Opt_pass, "pass=%s" },
202 { Opt_pass, "password=%s" },
203 { Opt_blank_ip, "ip=" },
204 { Opt_blank_ip, "addr=" },
206 { Opt_ip, "addr=%s" },
207 { Opt_ignore, "unc=%s" },
208 { Opt_ignore, "target=%s" },
209 { Opt_ignore, "path=%s" },
210 { Opt_domain, "dom=%s" },
211 { Opt_domain, "domain=%s" },
212 { Opt_domain, "workgroup=%s" },
213 { Opt_srcaddr, "srcaddr=%s" },
214 { Opt_ignore, "prefixpath=%s" },
215 { Opt_iocharset, "iocharset=%s" },
216 { Opt_netbiosname, "netbiosname=%s" },
217 { Opt_servern, "servern=%s" },
218 { Opt_ver, "ver=%s" },
219 { Opt_vers, "vers=%s" },
220 { Opt_sec, "sec=%s" },
221 { Opt_cache, "cache=%s" },
223 { Opt_ignore, "cred" },
224 { Opt_ignore, "credentials" },
225 { Opt_ignore, "cred=%s" },
226 { Opt_ignore, "credentials=%s" },
227 { Opt_ignore, "guest" },
228 { Opt_ignore, "rw" },
229 { Opt_ignore, "ro" },
230 { Opt_ignore, "suid" },
231 { Opt_ignore, "nosuid" },
232 { Opt_ignore, "exec" },
233 { Opt_ignore, "noexec" },
234 { Opt_ignore, "nodev" },
235 { Opt_ignore, "noauto" },
236 { Opt_ignore, "dev" },
237 { Opt_ignore, "mand" },
238 { Opt_ignore, "nomand" },
239 { Opt_ignore, "_netdev" },
245 Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p,
246 Opt_sec_ntlmsspi, Opt_sec_ntlmssp,
247 Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2,
248 Opt_sec_ntlmv2i, Opt_sec_lanman,
254 static const match_table_t cifs_secflavor_tokens = {
255 { Opt_sec_krb5, "krb5" },
256 { Opt_sec_krb5i, "krb5i" },
257 { Opt_sec_krb5p, "krb5p" },
258 { Opt_sec_ntlmsspi, "ntlmsspi" },
259 { Opt_sec_ntlmssp, "ntlmssp" },
260 { Opt_ntlm, "ntlm" },
261 { Opt_sec_ntlmi, "ntlmi" },
262 { Opt_sec_ntlmv2, "nontlm" },
263 { Opt_sec_ntlmv2, "ntlmv2" },
264 { Opt_sec_ntlmv2i, "ntlmv2i" },
265 { Opt_sec_lanman, "lanman" },
266 { Opt_sec_none, "none" },
268 { Opt_sec_err, NULL }
279 static const match_table_t cifs_cacheflavor_tokens = {
280 { Opt_cache_loose, "loose" },
281 { Opt_cache_strict, "strict" },
282 { Opt_cache_none, "none" },
283 { Opt_cache_err, NULL }
286 static const match_table_t cifs_smb_version_tokens = {
287 { Smb_1, SMB1_VERSION_STRING },
288 { Smb_20, SMB20_VERSION_STRING},
289 { Smb_21, SMB21_VERSION_STRING },
290 { Smb_30, SMB30_VERSION_STRING },
291 { Smb_302, SMB302_VERSION_STRING },
292 #ifdef CONFIG_CIFS_SMB311
293 { Smb_311, SMB311_VERSION_STRING },
294 { Smb_311, ALT_SMB311_VERSION_STRING },
296 { Smb_version_err, NULL }
299 static int ip_connect(struct TCP_Server_Info *server);
300 static int generic_ip_connect(struct TCP_Server_Info *server);
301 static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink);
302 static void cifs_prune_tlinks(struct work_struct *work);
303 static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
304 const char *devname);
307 * cifs tcp session reconnection
309 * mark tcp session as reconnecting so temporarily locked
310 * mark all smb sessions as reconnecting for tcp session
311 * reconnect tcp session
312 * wake up waiters on reconnection? - (not needed currently)
315 cifs_reconnect(struct TCP_Server_Info *server)
318 struct list_head *tmp, *tmp2;
319 struct cifs_ses *ses;
320 struct cifs_tcon *tcon;
321 struct mid_q_entry *mid_entry;
322 struct list_head retry_list;
324 spin_lock(&GlobalMid_Lock);
325 if (server->tcpStatus == CifsExiting) {
326 /* the demux thread will exit normally
327 next time through the loop */
328 spin_unlock(&GlobalMid_Lock);
331 server->tcpStatus = CifsNeedReconnect;
332 spin_unlock(&GlobalMid_Lock);
334 #ifdef CONFIG_CIFS_SMB2
335 server->max_read = 0;
338 cifs_dbg(FYI, "Reconnecting tcp session\n");
340 /* before reconnecting the tcp session, mark the smb session (uid)
341 and the tid bad so they are not used until reconnected */
342 cifs_dbg(FYI, "%s: marking sessions and tcons for reconnect\n",
344 spin_lock(&cifs_tcp_ses_lock);
345 list_for_each(tmp, &server->smb_ses_list) {
346 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
347 ses->need_reconnect = true;
349 list_for_each(tmp2, &ses->tcon_list) {
350 tcon = list_entry(tmp2, struct cifs_tcon, tcon_list);
351 tcon->need_reconnect = true;
354 spin_unlock(&cifs_tcp_ses_lock);
356 /* do not want to be sending data on a socket we are freeing */
357 cifs_dbg(FYI, "%s: tearing down socket\n", __func__);
358 mutex_lock(&server->srv_mutex);
359 if (server->ssocket) {
360 cifs_dbg(FYI, "State: 0x%x Flags: 0x%lx\n",
361 server->ssocket->state, server->ssocket->flags);
362 kernel_sock_shutdown(server->ssocket, SHUT_WR);
363 cifs_dbg(FYI, "Post shutdown state: 0x%x Flags: 0x%lx\n",
364 server->ssocket->state, server->ssocket->flags);
365 sock_release(server->ssocket);
366 server->ssocket = NULL;
368 server->sequence_number = 0;
369 server->session_estab = false;
370 kfree(server->session_key.response);
371 server->session_key.response = NULL;
372 server->session_key.len = 0;
373 server->lstrp = jiffies;
375 /* mark submitted MIDs for retry and issue callback */
376 INIT_LIST_HEAD(&retry_list);
377 cifs_dbg(FYI, "%s: moving mids to private list\n", __func__);
378 spin_lock(&GlobalMid_Lock);
379 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
380 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
381 if (mid_entry->mid_state == MID_REQUEST_SUBMITTED)
382 mid_entry->mid_state = MID_RETRY_NEEDED;
383 list_move(&mid_entry->qhead, &retry_list);
385 spin_unlock(&GlobalMid_Lock);
386 mutex_unlock(&server->srv_mutex);
388 cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__);
389 list_for_each_safe(tmp, tmp2, &retry_list) {
390 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
391 list_del_init(&mid_entry->qhead);
392 mid_entry->callback(mid_entry);
398 /* we should try only the port we connected to before */
399 mutex_lock(&server->srv_mutex);
400 rc = generic_ip_connect(server);
402 cifs_dbg(FYI, "reconnect error %d\n", rc);
403 mutex_unlock(&server->srv_mutex);
406 atomic_inc(&tcpSesReconnectCount);
407 spin_lock(&GlobalMid_Lock);
408 if (server->tcpStatus != CifsExiting)
409 server->tcpStatus = CifsNeedNegotiate;
410 spin_unlock(&GlobalMid_Lock);
411 mutex_unlock(&server->srv_mutex);
413 } while (server->tcpStatus == CifsNeedReconnect);
419 cifs_echo_request(struct work_struct *work)
422 struct TCP_Server_Info *server = container_of(work,
423 struct TCP_Server_Info, echo.work);
424 unsigned long echo_interval = server->echo_interval;
427 * We cannot send an echo if it is disabled or until the
428 * NEGOTIATE_PROTOCOL request is done, which is indicated by
429 * server->ops->need_neg() == true. Also, no need to ping if
430 * we got a response recently.
433 if (server->tcpStatus == CifsNeedReconnect ||
434 server->tcpStatus == CifsExiting || server->tcpStatus == CifsNew ||
435 (server->ops->can_echo && !server->ops->can_echo(server)) ||
436 time_before(jiffies, server->lstrp + echo_interval - HZ))
439 rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS;
441 cifs_dbg(FYI, "Unable to send echo request to server: %s\n",
445 queue_delayed_work(cifsiod_wq, &server->echo, echo_interval);
449 allocate_buffers(struct TCP_Server_Info *server)
451 if (!server->bigbuf) {
452 server->bigbuf = (char *)cifs_buf_get();
453 if (!server->bigbuf) {
454 cifs_dbg(VFS, "No memory for large SMB response\n");
456 /* retry will check if exiting */
459 } else if (server->large_buf) {
460 /* we are reusing a dirty large buf, clear its start */
461 memset(server->bigbuf, 0, HEADER_SIZE(server));
464 if (!server->smallbuf) {
465 server->smallbuf = (char *)cifs_small_buf_get();
466 if (!server->smallbuf) {
467 cifs_dbg(VFS, "No memory for SMB response\n");
469 /* retry will check if exiting */
472 /* beginning of smb buffer is cleared in our buf_get */
474 /* if existing small buf clear beginning */
475 memset(server->smallbuf, 0, HEADER_SIZE(server));
482 server_unresponsive(struct TCP_Server_Info *server)
485 * We need to wait 2 echo intervals to make sure we handle such
487 * 1s client sends a normal SMB request
488 * 2s client gets a response
489 * 30s echo workqueue job pops, and decides we got a response recently
490 * and don't need to send another
492 * 65s kernel_recvmsg times out, and we see that we haven't gotten
493 * a response in >60s.
495 if (server->tcpStatus == CifsGood &&
496 time_after(jiffies, server->lstrp + 2 * server->echo_interval)) {
497 cifs_dbg(VFS, "Server %s has not responded in %lu seconds. Reconnecting...\n",
498 server->hostname, (2 * server->echo_interval) / HZ);
499 cifs_reconnect(server);
500 wake_up(&server->response_q);
508 cifs_readv_from_socket(struct TCP_Server_Info *server, struct msghdr *smb_msg)
513 smb_msg->msg_control = NULL;
514 smb_msg->msg_controllen = 0;
516 for (total_read = 0; msg_data_left(smb_msg); total_read += length) {
519 if (server_unresponsive(server))
520 return -ECONNABORTED;
522 length = sock_recvmsg(server->ssocket, smb_msg, 0);
524 if (server->tcpStatus == CifsExiting)
527 if (server->tcpStatus == CifsNeedReconnect) {
528 cifs_reconnect(server);
529 return -ECONNABORTED;
532 if (length == -ERESTARTSYS ||
536 * Minimum sleep to prevent looping, allowing socket
537 * to clear and app threads to set tcpStatus
538 * CifsNeedReconnect if server hung.
540 usleep_range(1000, 2000);
546 cifs_dbg(FYI, "Received no data or error: %d\n", length);
547 cifs_reconnect(server);
548 return -ECONNABORTED;
555 cifs_read_from_socket(struct TCP_Server_Info *server, char *buf,
556 unsigned int to_read)
558 struct msghdr smb_msg;
559 struct kvec iov = {.iov_base = buf, .iov_len = to_read};
560 iov_iter_kvec(&smb_msg.msg_iter, READ | ITER_KVEC, &iov, 1, to_read);
562 return cifs_readv_from_socket(server, &smb_msg);
566 cifs_read_page_from_socket(struct TCP_Server_Info *server, struct page *page,
567 unsigned int to_read)
569 struct msghdr smb_msg;
570 struct bio_vec bv = {.bv_page = page, .bv_len = to_read};
571 iov_iter_bvec(&smb_msg.msg_iter, READ | ITER_BVEC, &bv, 1, to_read);
572 return cifs_readv_from_socket(server, &smb_msg);
576 is_smb_response(struct TCP_Server_Info *server, unsigned char type)
579 * The first byte big endian of the length field,
580 * is actually not part of the length but the type
581 * with the most common, zero, as regular data.
584 case RFC1002_SESSION_MESSAGE:
585 /* Regular SMB response */
587 case RFC1002_SESSION_KEEP_ALIVE:
588 cifs_dbg(FYI, "RFC 1002 session keep alive\n");
590 case RFC1002_POSITIVE_SESSION_RESPONSE:
591 cifs_dbg(FYI, "RFC 1002 positive session response\n");
593 case RFC1002_NEGATIVE_SESSION_RESPONSE:
595 * We get this from Windows 98 instead of an error on
596 * SMB negprot response.
598 cifs_dbg(FYI, "RFC 1002 negative session response\n");
599 /* give server a second to clean up */
602 * Always try 445 first on reconnect since we get NACK
603 * on some if we ever connected to port 139 (the NACK
604 * is since we do not begin with RFC1001 session
607 cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT);
608 cifs_reconnect(server);
609 wake_up(&server->response_q);
612 cifs_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type);
613 cifs_reconnect(server);
620 dequeue_mid(struct mid_q_entry *mid, bool malformed)
622 #ifdef CONFIG_CIFS_STATS2
623 mid->when_received = jiffies;
625 spin_lock(&GlobalMid_Lock);
627 mid->mid_state = MID_RESPONSE_RECEIVED;
629 mid->mid_state = MID_RESPONSE_MALFORMED;
630 list_del_init(&mid->qhead);
631 spin_unlock(&GlobalMid_Lock);
635 handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server,
636 char *buf, int malformed)
638 if (server->ops->check_trans2 &&
639 server->ops->check_trans2(mid, server, buf, malformed))
642 mid->large_buf = server->large_buf;
643 /* Was previous buf put in mpx struct for multi-rsp? */
644 if (!mid->multiRsp) {
645 /* smb buffer will be freed by user thread */
646 if (server->large_buf)
647 server->bigbuf = NULL;
649 server->smallbuf = NULL;
651 dequeue_mid(mid, malformed);
654 static void clean_demultiplex_info(struct TCP_Server_Info *server)
658 /* take it off the list, if it's not already */
659 spin_lock(&cifs_tcp_ses_lock);
660 list_del_init(&server->tcp_ses_list);
661 spin_unlock(&cifs_tcp_ses_lock);
663 spin_lock(&GlobalMid_Lock);
664 server->tcpStatus = CifsExiting;
665 spin_unlock(&GlobalMid_Lock);
666 wake_up_all(&server->response_q);
668 /* check if we have blocked requests that need to free */
669 spin_lock(&server->req_lock);
670 if (server->credits <= 0)
672 spin_unlock(&server->req_lock);
674 * Although there should not be any requests blocked on this queue it
675 * can not hurt to be paranoid and try to wake up requests that may
676 * haven been blocked when more than 50 at time were on the wire to the
677 * same server - they now will see the session is in exit state and get
678 * out of SendReceive.
680 wake_up_all(&server->request_q);
681 /* give those requests time to exit */
684 if (server->ssocket) {
685 sock_release(server->ssocket);
686 server->ssocket = NULL;
689 if (!list_empty(&server->pending_mid_q)) {
690 struct list_head dispose_list;
691 struct mid_q_entry *mid_entry;
692 struct list_head *tmp, *tmp2;
694 INIT_LIST_HEAD(&dispose_list);
695 spin_lock(&GlobalMid_Lock);
696 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
697 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
698 cifs_dbg(FYI, "Clearing mid 0x%llx\n", mid_entry->mid);
699 mid_entry->mid_state = MID_SHUTDOWN;
700 list_move(&mid_entry->qhead, &dispose_list);
702 spin_unlock(&GlobalMid_Lock);
704 /* now walk dispose list and issue callbacks */
705 list_for_each_safe(tmp, tmp2, &dispose_list) {
706 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
707 cifs_dbg(FYI, "Callback mid 0x%llx\n", mid_entry->mid);
708 list_del_init(&mid_entry->qhead);
709 mid_entry->callback(mid_entry);
711 /* 1/8th of sec is more than enough time for them to exit */
715 if (!list_empty(&server->pending_mid_q)) {
717 * mpx threads have not exited yet give them at least the smb
718 * send timeout time for long ops.
720 * Due to delays on oplock break requests, we need to wait at
721 * least 45 seconds before giving up on a request getting a
722 * response and going ahead and killing cifsd.
724 cifs_dbg(FYI, "Wait for exit from demultiplex thread\n");
727 * If threads still have not exited they are probably never
728 * coming home not much else we can do but free the memory.
732 kfree(server->hostname);
735 length = atomic_dec_return(&tcpSesAllocCount);
737 mempool_resize(cifs_req_poolp, length + cifs_min_rcv);
741 standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid)
744 char *buf = server->smallbuf;
745 unsigned int pdu_length = get_rfc1002_length(buf);
747 /* make sure this will fit in a large buffer */
748 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) {
749 cifs_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length);
750 cifs_reconnect(server);
751 wake_up(&server->response_q);
752 return -ECONNABORTED;
755 /* switch to large buffer if too big for a small one */
756 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
757 server->large_buf = true;
758 memcpy(server->bigbuf, buf, server->total_read);
759 buf = server->bigbuf;
762 /* now read the rest */
763 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
764 pdu_length - HEADER_SIZE(server) + 1 + 4);
767 server->total_read += length;
769 dump_smb(buf, server->total_read);
772 * We know that we received enough to get to the MID as we
773 * checked the pdu_length earlier. Now check to see
774 * if the rest of the header is OK. We borrow the length
775 * var for the rest of the loop to avoid a new stack var.
777 * 48 bytes is enough to display the header and a little bit
778 * into the payload for debugging purposes.
780 length = server->ops->check_message(buf, server->total_read, server);
782 cifs_dump_mem("Bad SMB: ", buf,
783 min_t(unsigned int, server->total_read, 48));
785 if (server->ops->is_status_pending &&
786 server->ops->is_status_pending(buf, server, length))
792 handle_mid(mid, server, buf, length);
797 cifs_demultiplex_thread(void *p)
800 struct TCP_Server_Info *server = p;
801 unsigned int pdu_length;
803 struct task_struct *task_to_wake = NULL;
804 struct mid_q_entry *mid_entry;
806 current->flags |= PF_MEMALLOC;
807 cifs_dbg(FYI, "Demultiplex PID: %d\n", task_pid_nr(current));
809 length = atomic_inc_return(&tcpSesAllocCount);
811 mempool_resize(cifs_req_poolp, length + cifs_min_rcv);
814 while (server->tcpStatus != CifsExiting) {
818 if (!allocate_buffers(server))
821 server->large_buf = false;
822 buf = server->smallbuf;
823 pdu_length = 4; /* enough to get RFC1001 header */
825 length = cifs_read_from_socket(server, buf, pdu_length);
828 server->total_read = length;
831 * The right amount was read from socket - 4 bytes,
832 * so we can now interpret the length field.
834 pdu_length = get_rfc1002_length(buf);
836 cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length);
837 if (!is_smb_response(server, buf[0]))
840 /* make sure we have enough to get to the MID */
841 if (pdu_length < HEADER_SIZE(server) - 1 - 4) {
842 cifs_dbg(VFS, "SMB response too short (%u bytes)\n",
844 cifs_reconnect(server);
845 wake_up(&server->response_q);
849 /* read down to the MID */
850 length = cifs_read_from_socket(server, buf + 4,
851 HEADER_SIZE(server) - 1 - 4);
854 server->total_read += length;
856 mid_entry = server->ops->find_mid(server, buf);
858 if (!mid_entry || !mid_entry->receive)
859 length = standard_receive3(server, mid_entry);
861 length = mid_entry->receive(server, mid_entry);
866 if (server->large_buf)
867 buf = server->bigbuf;
869 server->lstrp = jiffies;
870 if (mid_entry != NULL) {
871 if (!mid_entry->multiRsp || mid_entry->multiEnd)
872 mid_entry->callback(mid_entry);
873 } else if (!server->ops->is_oplock_break ||
874 !server->ops->is_oplock_break(buf, server)) {
875 cifs_dbg(VFS, "No task to wake, unknown frame received! NumMids %d\n",
876 atomic_read(&midCount));
877 cifs_dump_mem("Received Data is: ", buf,
878 HEADER_SIZE(server));
879 #ifdef CONFIG_CIFS_DEBUG2
880 if (server->ops->dump_detail)
881 server->ops->dump_detail(buf);
882 cifs_dump_mids(server);
883 #endif /* CIFS_DEBUG2 */
886 } /* end while !EXITING */
888 /* buffer usually freed in free_mid - need to free it here on exit */
889 cifs_buf_release(server->bigbuf);
890 if (server->smallbuf) /* no sense logging a debug message if NULL */
891 cifs_small_buf_release(server->smallbuf);
893 task_to_wake = xchg(&server->tsk, NULL);
894 clean_demultiplex_info(server);
896 /* if server->tsk was NULL then wait for a signal before exiting */
898 set_current_state(TASK_INTERRUPTIBLE);
899 while (!signal_pending(current)) {
901 set_current_state(TASK_INTERRUPTIBLE);
903 set_current_state(TASK_RUNNING);
906 module_put_and_exit(0);
909 /* extract the host portion of the UNC string */
911 extract_hostname(const char *unc)
917 /* skip double chars at beginning of string */
918 /* BB: check validity of these bytes? */
921 /* delimiter between hostname and sharename is always '\\' now */
922 delim = strchr(src, '\\');
924 return ERR_PTR(-EINVAL);
927 dst = kmalloc((len + 1), GFP_KERNEL);
929 return ERR_PTR(-ENOMEM);
931 memcpy(dst, src, len);
937 static int get_option_ul(substring_t args[], unsigned long *option)
942 string = match_strdup(args);
945 rc = kstrtoul(string, 0, option);
951 static int get_option_uid(substring_t args[], kuid_t *result)
957 rc = get_option_ul(args, &value);
961 uid = make_kuid(current_user_ns(), value);
969 static int get_option_gid(substring_t args[], kgid_t *result)
975 rc = get_option_ul(args, &value);
979 gid = make_kgid(current_user_ns(), value);
987 static int cifs_parse_security_flavors(char *value,
991 substring_t args[MAX_OPT_ARGS];
994 * With mount options, the last one should win. Reset any existing
995 * settings back to default.
997 vol->sectype = Unspecified;
1000 switch (match_token(value, cifs_secflavor_tokens, args)) {
1002 cifs_dbg(VFS, "sec=krb5p is not supported!\n");
1008 vol->sectype = Kerberos;
1010 case Opt_sec_ntlmsspi:
1013 case Opt_sec_ntlmssp:
1014 vol->sectype = RawNTLMSSP;
1020 vol->sectype = NTLM;
1022 case Opt_sec_ntlmv2i:
1025 case Opt_sec_ntlmv2:
1026 vol->sectype = NTLMv2;
1028 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1029 case Opt_sec_lanman:
1030 vol->sectype = LANMAN;
1037 cifs_dbg(VFS, "bad security option: %s\n", value);
1045 cifs_parse_cache_flavor(char *value, struct smb_vol *vol)
1047 substring_t args[MAX_OPT_ARGS];
1049 switch (match_token(value, cifs_cacheflavor_tokens, args)) {
1050 case Opt_cache_loose:
1051 vol->direct_io = false;
1052 vol->strict_io = false;
1054 case Opt_cache_strict:
1055 vol->direct_io = false;
1056 vol->strict_io = true;
1058 case Opt_cache_none:
1059 vol->direct_io = true;
1060 vol->strict_io = false;
1063 cifs_dbg(VFS, "bad cache= option: %s\n", value);
1070 cifs_parse_smb_version(char *value, struct smb_vol *vol)
1072 substring_t args[MAX_OPT_ARGS];
1074 switch (match_token(value, cifs_smb_version_tokens, args)) {
1076 vol->ops = &smb1_operations;
1077 vol->vals = &smb1_values;
1079 #ifdef CONFIG_CIFS_SMB2
1081 vol->ops = &smb20_operations;
1082 vol->vals = &smb20_values;
1085 vol->ops = &smb21_operations;
1086 vol->vals = &smb21_values;
1089 vol->ops = &smb30_operations;
1090 vol->vals = &smb30_values;
1093 vol->ops = &smb30_operations; /* currently identical with 3.0 */
1094 vol->vals = &smb302_values;
1096 #ifdef CONFIG_CIFS_SMB311
1098 vol->ops = &smb311_operations;
1099 vol->vals = &smb311_values;
1104 cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value);
1111 * Parse a devname into substrings and populate the vol->UNC and vol->prepath
1112 * fields with the result. Returns 0 on success and an error otherwise.
1115 cifs_parse_devname(const char *devname, struct smb_vol *vol)
1118 const char *delims = "/\\";
1121 /* make sure we have a valid UNC double delimiter prefix */
1122 len = strspn(devname, delims);
1126 /* find delimiter between host and sharename */
1127 pos = strpbrk(devname + 2, delims);
1131 /* skip past delimiter */
1134 /* now go until next delimiter or end of string */
1135 len = strcspn(pos, delims);
1137 /* move "pos" up to delimiter or NULL */
1139 vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL);
1143 convert_delimiter(vol->UNC, '\\');
1145 /* skip any delimiter */
1146 if (*pos == '/' || *pos == '\\')
1149 /* If pos is NULL then no prepath */
1153 vol->prepath = kstrdup(pos, GFP_KERNEL);
1161 cifs_parse_mount_options(const char *mountdata, const char *devname,
1162 struct smb_vol *vol)
1165 char *mountdata_copy = NULL, *options;
1166 unsigned int temp_len, i, j;
1168 short int override_uid = -1;
1169 short int override_gid = -1;
1170 bool uid_specified = false;
1171 bool gid_specified = false;
1172 bool sloppy = false;
1173 char *invalid = NULL;
1174 char *nodename = utsname()->nodename;
1175 char *string = NULL;
1176 char *tmp_end, *value;
1178 bool got_ip = false;
1179 unsigned short port = 0;
1180 struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr;
1184 delim = separator[0];
1186 /* ensure we always start with zeroed-out smb_vol */
1187 memset(vol, 0, sizeof(*vol));
1190 * does not have to be perfect mapping since field is
1191 * informational, only used for servers that do not support
1192 * port 445 and it can be overridden at mount time
1194 memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
1195 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
1196 vol->source_rfc1001_name[i] = toupper(nodename[i]);
1198 vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
1199 /* null target name indicates to use *SMBSERVR default called name
1200 if we end up sending RFC1001 session initialize */
1201 vol->target_rfc1001_name[0] = 0;
1202 vol->cred_uid = current_uid();
1203 vol->linux_uid = current_uid();
1204 vol->linux_gid = current_gid();
1207 * default to SFM style remapping of seven reserved characters
1208 * unless user overrides it or we negotiate CIFS POSIX where
1209 * it is unnecessary. Can not simultaneously use more than one mapping
1210 * since then readdir could list files that open could not open
1214 /* default to only allowing write access to owner of the mount */
1215 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
1217 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
1218 /* default is always to request posix paths. */
1219 vol->posix_paths = 1;
1220 /* default to using server inode numbers where available */
1221 vol->server_ino = 1;
1223 /* default is to use strict cifs caching semantics */
1224 vol->strict_io = true;
1226 vol->actimeo = CIFS_DEF_ACTIMEO;
1228 /* FIXME: add autonegotiation -- for now, SMB1 is default */
1229 vol->ops = &smb1_operations;
1230 vol->vals = &smb1_values;
1232 vol->echo_interval = SMB_ECHO_INTERVAL_DEFAULT;
1235 goto cifs_parse_mount_err;
1237 mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL);
1238 if (!mountdata_copy)
1239 goto cifs_parse_mount_err;
1241 options = mountdata_copy;
1242 end = options + strlen(options);
1244 if (strncmp(options, "sep=", 4) == 0) {
1245 if (options[4] != 0) {
1246 separator[0] = options[4];
1249 cifs_dbg(FYI, "Null separator not allowed\n");
1252 vol->backupuid_specified = false; /* no backup intent for a user */
1253 vol->backupgid_specified = false; /* no backup intent for a group */
1255 switch (cifs_parse_devname(devname, vol)) {
1259 cifs_dbg(VFS, "Unable to allocate memory for devname.\n");
1260 goto cifs_parse_mount_err;
1262 cifs_dbg(VFS, "Malformed UNC in devname.\n");
1263 goto cifs_parse_mount_err;
1265 cifs_dbg(VFS, "Unknown error parsing devname.\n");
1266 goto cifs_parse_mount_err;
1269 while ((data = strsep(&options, separator)) != NULL) {
1270 substring_t args[MAX_OPT_ARGS];
1271 unsigned long option;
1277 token = match_token(data, cifs_mount_option_tokens, args);
1281 /* Ingnore the following */
1285 /* Boolean values */
1286 case Opt_user_xattr:
1289 case Opt_nouser_xattr:
1295 case Opt_noforceuid:
1301 case Opt_noforcegid:
1304 case Opt_noblocksend:
1305 vol->noblocksnd = 1;
1307 case Opt_noautotune:
1308 vol->noautotune = 1;
1323 vol->sfu_remap = true;
1324 vol->remap = false; /* disable SFM mapping */
1326 case Opt_nomapchars:
1327 vol->sfu_remap = false;
1331 vol->sfu_remap = false; /* disable SFU mapping */
1333 case Opt_nomapposix:
1345 case Opt_posixpaths:
1346 vol->posix_paths = 1;
1348 case Opt_noposixpaths:
1349 vol->posix_paths = 0;
1352 vol->no_linux_ext = 1;
1363 * turn off mandatory locking in mode
1364 * if remote locking is turned off since the
1365 * local vfs will do advisory
1367 if (vol->file_mode ==
1368 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1369 vol->file_mode = S_IALLUGO;
1371 case Opt_forcemandatorylock:
1380 case Opt_setuidfromacl:
1381 vol->setuidfromacl = 1;
1384 vol->dynperm = true;
1387 vol->dynperm = false;
1401 case Opt_nostrictsync:
1402 vol->nostrictsync = 1;
1404 case Opt_strictsync:
1405 vol->nostrictsync = 0;
1408 vol->server_ino = 1;
1410 case Opt_noserverino:
1411 vol->server_ino = 0;
1413 case Opt_rwpidforward:
1414 vol->rwpidforward = 1;
1423 vol->no_psx_acl = 0;
1426 vol->no_psx_acl = 1;
1428 case Opt_locallease:
1429 vol->local_lease = 1;
1435 /* we do not do the following in secFlags because seal
1436 * is a per tree connection (mount) not a per socket
1437 * or per-smb connection option in the protocol
1438 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1443 pr_warn("CIFS: Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n");
1446 #ifndef CONFIG_CIFS_FSCACHE
1447 cifs_dbg(VFS, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n");
1448 goto cifs_parse_mount_err;
1452 case Opt_mfsymlinks:
1453 vol->mfsymlinks = true;
1456 vol->multiuser = true;
1461 case Opt_nosharesock:
1462 vol->nosharesock = true;
1464 case Opt_nopersistent:
1465 vol->nopersistent = true;
1466 if (vol->persistent) {
1468 "persistenthandles mount options conflict\n");
1469 goto cifs_parse_mount_err;
1472 case Opt_persistent:
1473 vol->persistent = true;
1474 if ((vol->nopersistent) || (vol->resilient)) {
1476 "persistenthandles mount options conflict\n");
1477 goto cifs_parse_mount_err;
1481 vol->resilient = true;
1482 if (vol->persistent) {
1484 "persistenthandles mount options conflict\n");
1485 goto cifs_parse_mount_err;
1488 case Opt_noresilient:
1489 vol->resilient = false; /* already the default */
1492 /* Numeric Values */
1494 if (get_option_uid(args, &vol->backupuid)) {
1495 cifs_dbg(VFS, "%s: Invalid backupuid value\n",
1497 goto cifs_parse_mount_err;
1499 vol->backupuid_specified = true;
1502 if (get_option_gid(args, &vol->backupgid)) {
1503 cifs_dbg(VFS, "%s: Invalid backupgid value\n",
1505 goto cifs_parse_mount_err;
1507 vol->backupgid_specified = true;
1510 if (get_option_uid(args, &vol->linux_uid)) {
1511 cifs_dbg(VFS, "%s: Invalid uid value\n",
1513 goto cifs_parse_mount_err;
1515 uid_specified = true;
1518 if (get_option_uid(args, &vol->cred_uid)) {
1519 cifs_dbg(VFS, "%s: Invalid cruid value\n",
1521 goto cifs_parse_mount_err;
1525 if (get_option_gid(args, &vol->linux_gid)) {
1526 cifs_dbg(VFS, "%s: Invalid gid value\n",
1528 goto cifs_parse_mount_err;
1530 gid_specified = true;
1533 if (get_option_ul(args, &option)) {
1534 cifs_dbg(VFS, "%s: Invalid file_mode value\n",
1536 goto cifs_parse_mount_err;
1538 vol->file_mode = option;
1541 if (get_option_ul(args, &option)) {
1542 cifs_dbg(VFS, "%s: Invalid dir_mode value\n",
1544 goto cifs_parse_mount_err;
1546 vol->dir_mode = option;
1549 if (get_option_ul(args, &option) ||
1550 option > USHRT_MAX) {
1551 cifs_dbg(VFS, "%s: Invalid port value\n",
1553 goto cifs_parse_mount_err;
1555 port = (unsigned short)option;
1558 if (get_option_ul(args, &option)) {
1559 cifs_dbg(VFS, "%s: Invalid rsize value\n",
1561 goto cifs_parse_mount_err;
1563 vol->rsize = option;
1566 if (get_option_ul(args, &option)) {
1567 cifs_dbg(VFS, "%s: Invalid wsize value\n",
1569 goto cifs_parse_mount_err;
1571 vol->wsize = option;
1574 if (get_option_ul(args, &option)) {
1575 cifs_dbg(VFS, "%s: Invalid actimeo value\n",
1577 goto cifs_parse_mount_err;
1579 vol->actimeo = HZ * option;
1580 if (vol->actimeo > CIFS_MAX_ACTIMEO) {
1581 cifs_dbg(VFS, "attribute cache timeout too large\n");
1582 goto cifs_parse_mount_err;
1585 case Opt_echo_interval:
1586 if (get_option_ul(args, &option)) {
1587 cifs_dbg(VFS, "%s: Invalid echo interval value\n",
1589 goto cifs_parse_mount_err;
1591 vol->echo_interval = option;
1593 case Opt_max_credits:
1594 if (get_option_ul(args, &option) || (option < 20) ||
1596 cifs_dbg(VFS, "%s: Invalid max_credits value\n",
1598 goto cifs_parse_mount_err;
1600 vol->max_credits = option;
1603 /* String Arguments */
1605 case Opt_blank_user:
1606 /* null user, ie. anonymous authentication */
1608 vol->username = NULL;
1611 string = match_strdup(args);
1615 if (strnlen(string, CIFS_MAX_USERNAME_LEN) >
1616 CIFS_MAX_USERNAME_LEN) {
1617 pr_warn("CIFS: username too long\n");
1618 goto cifs_parse_mount_err;
1621 kfree(vol->username);
1622 vol->username = kstrdup(string, GFP_KERNEL);
1624 goto cifs_parse_mount_err;
1626 case Opt_blank_pass:
1627 /* passwords have to be handled differently
1628 * to allow the character used for deliminator
1629 * to be passed within them
1633 * Check if this is a case where the password
1634 * starts with a delimiter
1636 tmp_end = strchr(data, '=');
1638 if (!(tmp_end < end && tmp_end[1] == delim)) {
1639 /* No it is not. Set the password to NULL */
1640 kfree(vol->password);
1641 vol->password = NULL;
1644 /* Yes it is. Drop down to Opt_pass below.*/
1646 /* Obtain the value string */
1647 value = strchr(data, '=');
1650 /* Set tmp_end to end of the string */
1651 tmp_end = (char *) value + strlen(value);
1653 /* Check if following character is the deliminator
1654 * If yes, we have encountered a double deliminator
1655 * reset the NULL character to the deliminator
1657 if (tmp_end < end && tmp_end[1] == delim) {
1660 /* Keep iterating until we get to a single
1661 * deliminator OR the end
1663 while ((tmp_end = strchr(tmp_end, delim))
1664 != NULL && (tmp_end[1] == delim)) {
1665 tmp_end = (char *) &tmp_end[2];
1668 /* Reset var options to point to next element */
1671 options = (char *) &tmp_end[1];
1673 /* Reached the end of the mount option
1678 kfree(vol->password);
1679 /* Now build new password string */
1680 temp_len = strlen(value);
1681 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
1682 if (vol->password == NULL) {
1683 pr_warn("CIFS: no memory for password\n");
1684 goto cifs_parse_mount_err;
1687 for (i = 0, j = 0; i < temp_len; i++, j++) {
1688 vol->password[j] = value[i];
1689 if ((value[i] == delim) &&
1690 value[i+1] == delim)
1691 /* skip the second deliminator */
1694 vol->password[j] = '\0';
1697 /* FIXME: should this be an error instead? */
1701 string = match_strdup(args);
1705 if (!cifs_convert_address(dstaddr, string,
1707 pr_err("CIFS: bad ip= option (%s).\n", string);
1708 goto cifs_parse_mount_err;
1713 string = match_strdup(args);
1717 if (strnlen(string, CIFS_MAX_DOMAINNAME_LEN)
1718 == CIFS_MAX_DOMAINNAME_LEN) {
1719 pr_warn("CIFS: domain name too long\n");
1720 goto cifs_parse_mount_err;
1723 kfree(vol->domainname);
1724 vol->domainname = kstrdup(string, GFP_KERNEL);
1725 if (!vol->domainname) {
1726 pr_warn("CIFS: no memory for domainname\n");
1727 goto cifs_parse_mount_err;
1729 cifs_dbg(FYI, "Domain name set\n");
1732 string = match_strdup(args);
1736 if (!cifs_convert_address(
1737 (struct sockaddr *)&vol->srcaddr,
1738 string, strlen(string))) {
1739 pr_warn("CIFS: Could not parse srcaddr: %s\n",
1741 goto cifs_parse_mount_err;
1745 string = match_strdup(args);
1749 if (strnlen(string, 1024) >= 65) {
1750 pr_warn("CIFS: iocharset name too long.\n");
1751 goto cifs_parse_mount_err;
1754 if (strncasecmp(string, "default", 7) != 0) {
1755 kfree(vol->iocharset);
1756 vol->iocharset = kstrdup(string,
1758 if (!vol->iocharset) {
1759 pr_warn("CIFS: no memory for charset\n");
1760 goto cifs_parse_mount_err;
1763 /* if iocharset not set then load_nls_default
1766 cifs_dbg(FYI, "iocharset set to %s\n", string);
1768 case Opt_netbiosname:
1769 string = match_strdup(args);
1773 memset(vol->source_rfc1001_name, 0x20,
1776 * FIXME: are there cases in which a comma can
1777 * be valid in workstation netbios name (and
1778 * need special handling)?
1780 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1781 /* don't ucase netbiosname for user */
1784 vol->source_rfc1001_name[i] = string[i];
1786 /* The string has 16th byte zero still from
1787 * set at top of the function
1789 if (i == RFC1001_NAME_LEN && string[i] != 0)
1790 pr_warn("CIFS: netbiosname longer than 15 truncated.\n");
1793 /* servernetbiosname specified override *SMBSERVER */
1794 string = match_strdup(args);
1798 /* last byte, type, is 0x20 for servr type */
1799 memset(vol->target_rfc1001_name, 0x20,
1800 RFC1001_NAME_LEN_WITH_NULL);
1802 /* BB are there cases in which a comma can be
1803 valid in this workstation netbios name
1804 (and need special handling)? */
1806 /* user or mount helper must uppercase the
1808 for (i = 0; i < 15; i++) {
1811 vol->target_rfc1001_name[i] = string[i];
1813 /* The string has 16th byte zero still from
1814 set at top of the function */
1815 if (i == RFC1001_NAME_LEN && string[i] != 0)
1816 pr_warn("CIFS: server netbiosname longer than 15 truncated.\n");
1819 string = match_strdup(args);
1823 if (strncasecmp(string, "1", 1) == 0) {
1824 /* This is the default */
1827 /* For all other value, error */
1828 pr_warn("CIFS: Invalid version specified\n");
1829 goto cifs_parse_mount_err;
1831 string = match_strdup(args);
1835 if (cifs_parse_smb_version(string, vol) != 0)
1836 goto cifs_parse_mount_err;
1839 string = match_strdup(args);
1843 if (cifs_parse_security_flavors(string, vol) != 0)
1844 goto cifs_parse_mount_err;
1847 string = match_strdup(args);
1851 if (cifs_parse_cache_flavor(string, vol) != 0)
1852 goto cifs_parse_mount_err;
1856 * An option we don't recognize. Save it off for later
1857 * if we haven't already found one
1863 /* Free up any allocated string */
1868 if (!sloppy && invalid) {
1869 pr_err("CIFS: Unknown mount option \"%s\"\n", invalid);
1870 goto cifs_parse_mount_err;
1874 /* Muliuser mounts require CONFIG_KEYS support */
1875 if (vol->multiuser) {
1876 cifs_dbg(VFS, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n");
1877 goto cifs_parse_mount_err;
1881 cifs_dbg(VFS, "CIFS mount error: No usable UNC path provided in device string!\n");
1882 goto cifs_parse_mount_err;
1885 /* make sure UNC has a share name */
1886 if (!strchr(vol->UNC + 3, '\\')) {
1887 cifs_dbg(VFS, "Malformed UNC. Unable to find share name.\n");
1888 goto cifs_parse_mount_err;
1892 /* No ip= option specified? Try to get it from UNC */
1893 if (!cifs_convert_address(dstaddr, &vol->UNC[2],
1894 strlen(&vol->UNC[2]))) {
1895 pr_err("Unable to determine destination address.\n");
1896 goto cifs_parse_mount_err;
1900 /* set the port that we got earlier */
1901 cifs_set_port(dstaddr, port);
1904 vol->override_uid = override_uid;
1905 else if (override_uid == 1)
1906 pr_notice("CIFS: ignoring forceuid mount option specified with no uid= option.\n");
1909 vol->override_gid = override_gid;
1910 else if (override_gid == 1)
1911 pr_notice("CIFS: ignoring forcegid mount option specified with no gid= option.\n");
1913 kfree(mountdata_copy);
1917 pr_warn("Could not allocate temporary buffer\n");
1918 cifs_parse_mount_err:
1920 kfree(mountdata_copy);
1924 /** Returns true if srcaddr isn't specified and rhs isn't
1925 * specified, or if srcaddr is specified and
1926 * matches the IP address of the rhs argument.
1929 srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs)
1931 switch (srcaddr->sa_family) {
1933 return (rhs->sa_family == AF_UNSPEC);
1935 struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr;
1936 struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs;
1937 return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr);
1940 struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr;
1941 struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs;
1942 return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr);
1946 return false; /* don't expect to be here */
1951 * If no port is specified in addr structure, we try to match with 445 port
1952 * and if it fails - with 139 ports. It should be called only if address
1953 * families of server and addr are equal.
1956 match_port(struct TCP_Server_Info *server, struct sockaddr *addr)
1958 __be16 port, *sport;
1960 switch (addr->sa_family) {
1962 sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port;
1963 port = ((struct sockaddr_in *) addr)->sin_port;
1966 sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port;
1967 port = ((struct sockaddr_in6 *) addr)->sin6_port;
1975 port = htons(CIFS_PORT);
1979 port = htons(RFC1001_PORT);
1982 return port == *sport;
1986 match_address(struct TCP_Server_Info *server, struct sockaddr *addr,
1987 struct sockaddr *srcaddr)
1989 switch (addr->sa_family) {
1991 struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
1992 struct sockaddr_in *srv_addr4 =
1993 (struct sockaddr_in *)&server->dstaddr;
1995 if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr)
2000 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
2001 struct sockaddr_in6 *srv_addr6 =
2002 (struct sockaddr_in6 *)&server->dstaddr;
2004 if (!ipv6_addr_equal(&addr6->sin6_addr,
2005 &srv_addr6->sin6_addr))
2007 if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id)
2013 return false; /* don't expect to be here */
2016 if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr))
2023 match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
2026 * The select_sectype function should either return the vol->sectype
2027 * that was specified, or "Unspecified" if that sectype was not
2028 * compatible with the given NEGOTIATE request.
2030 if (select_sectype(server, vol->sectype) == Unspecified)
2034 * Now check if signing mode is acceptable. No need to check
2035 * global_secflags at this point since if MUST_SIGN is set then
2036 * the server->sign had better be too.
2038 if (vol->sign && !server->sign)
2044 static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol)
2046 struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr;
2048 if (vol->nosharesock)
2051 if ((server->vals != vol->vals) || (server->ops != vol->ops))
2054 if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns))
2057 if (!match_address(server, addr,
2058 (struct sockaddr *)&vol->srcaddr))
2061 if (!match_port(server, addr))
2064 if (!match_security(server, vol))
2067 if (server->echo_interval != vol->echo_interval * HZ)
2073 static struct TCP_Server_Info *
2074 cifs_find_tcp_session(struct smb_vol *vol)
2076 struct TCP_Server_Info *server;
2078 spin_lock(&cifs_tcp_ses_lock);
2079 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
2080 if (!match_server(server, vol))
2083 ++server->srv_count;
2084 spin_unlock(&cifs_tcp_ses_lock);
2085 cifs_dbg(FYI, "Existing tcp session with server found\n");
2088 spin_unlock(&cifs_tcp_ses_lock);
2093 cifs_put_tcp_session(struct TCP_Server_Info *server)
2095 struct task_struct *task;
2097 spin_lock(&cifs_tcp_ses_lock);
2098 if (--server->srv_count > 0) {
2099 spin_unlock(&cifs_tcp_ses_lock);
2103 put_net(cifs_net_ns(server));
2105 list_del_init(&server->tcp_ses_list);
2106 spin_unlock(&cifs_tcp_ses_lock);
2108 cancel_delayed_work_sync(&server->echo);
2110 spin_lock(&GlobalMid_Lock);
2111 server->tcpStatus = CifsExiting;
2112 spin_unlock(&GlobalMid_Lock);
2114 cifs_crypto_shash_release(server);
2115 cifs_fscache_release_client_cookie(server);
2117 kfree(server->session_key.response);
2118 server->session_key.response = NULL;
2119 server->session_key.len = 0;
2121 task = xchg(&server->tsk, NULL);
2123 force_sig(SIGKILL, task);
2126 static struct TCP_Server_Info *
2127 cifs_get_tcp_session(struct smb_vol *volume_info)
2129 struct TCP_Server_Info *tcp_ses = NULL;
2132 cifs_dbg(FYI, "UNC: %s\n", volume_info->UNC);
2134 /* see if we already have a matching tcp_ses */
2135 tcp_ses = cifs_find_tcp_session(volume_info);
2139 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
2145 tcp_ses->ops = volume_info->ops;
2146 tcp_ses->vals = volume_info->vals;
2147 cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns));
2148 tcp_ses->hostname = extract_hostname(volume_info->UNC);
2149 if (IS_ERR(tcp_ses->hostname)) {
2150 rc = PTR_ERR(tcp_ses->hostname);
2151 goto out_err_crypto_release;
2154 tcp_ses->noblocksnd = volume_info->noblocksnd;
2155 tcp_ses->noautotune = volume_info->noautotune;
2156 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
2157 tcp_ses->in_flight = 0;
2158 tcp_ses->credits = 1;
2159 init_waitqueue_head(&tcp_ses->response_q);
2160 init_waitqueue_head(&tcp_ses->request_q);
2161 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
2162 mutex_init(&tcp_ses->srv_mutex);
2163 memcpy(tcp_ses->workstation_RFC1001_name,
2164 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
2165 memcpy(tcp_ses->server_RFC1001_name,
2166 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
2167 tcp_ses->session_estab = false;
2168 tcp_ses->sequence_number = 0;
2169 tcp_ses->lstrp = jiffies;
2170 spin_lock_init(&tcp_ses->req_lock);
2171 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
2172 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
2173 INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
2174 memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
2175 sizeof(tcp_ses->srcaddr));
2176 memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr,
2177 sizeof(tcp_ses->dstaddr));
2178 #ifdef CONFIG_CIFS_SMB2
2179 generate_random_uuid(tcp_ses->client_guid);
2182 * at this point we are the only ones with the pointer
2183 * to the struct since the kernel thread not created yet
2184 * no need to spinlock this init of tcpStatus or srv_count
2186 tcp_ses->tcpStatus = CifsNew;
2187 ++tcp_ses->srv_count;
2189 if (volume_info->echo_interval >= SMB_ECHO_INTERVAL_MIN &&
2190 volume_info->echo_interval <= SMB_ECHO_INTERVAL_MAX)
2191 tcp_ses->echo_interval = volume_info->echo_interval * HZ;
2193 tcp_ses->echo_interval = SMB_ECHO_INTERVAL_DEFAULT * HZ;
2195 rc = ip_connect(tcp_ses);
2197 cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n");
2198 goto out_err_crypto_release;
2202 * since we're in a cifs function already, we know that
2203 * this will succeed. No need for try_module_get().
2205 __module_get(THIS_MODULE);
2206 tcp_ses->tsk = kthread_run(cifs_demultiplex_thread,
2208 if (IS_ERR(tcp_ses->tsk)) {
2209 rc = PTR_ERR(tcp_ses->tsk);
2210 cifs_dbg(VFS, "error %d create cifsd thread\n", rc);
2211 module_put(THIS_MODULE);
2212 goto out_err_crypto_release;
2214 tcp_ses->tcpStatus = CifsNeedNegotiate;
2216 /* thread spawned, put it on the list */
2217 spin_lock(&cifs_tcp_ses_lock);
2218 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
2219 spin_unlock(&cifs_tcp_ses_lock);
2221 cifs_fscache_get_client_cookie(tcp_ses);
2223 /* queue echo request delayed work */
2224 queue_delayed_work(cifsiod_wq, &tcp_ses->echo, tcp_ses->echo_interval);
2228 out_err_crypto_release:
2229 cifs_crypto_shash_release(tcp_ses);
2231 put_net(cifs_net_ns(tcp_ses));
2235 if (!IS_ERR(tcp_ses->hostname))
2236 kfree(tcp_ses->hostname);
2237 if (tcp_ses->ssocket)
2238 sock_release(tcp_ses->ssocket);
2244 static int match_session(struct cifs_ses *ses, struct smb_vol *vol)
2246 if (vol->sectype != Unspecified &&
2247 vol->sectype != ses->sectype)
2250 switch (ses->sectype) {
2252 if (!uid_eq(vol->cred_uid, ses->cred_uid))
2256 /* NULL username means anonymous session */
2257 if (ses->user_name == NULL) {
2263 /* anything else takes username/password */
2264 if (strncmp(ses->user_name,
2265 vol->username ? vol->username : "",
2266 CIFS_MAX_USERNAME_LEN))
2268 if ((vol->username && strlen(vol->username) != 0) &&
2269 ses->password != NULL &&
2270 strncmp(ses->password,
2271 vol->password ? vol->password : "",
2272 CIFS_MAX_PASSWORD_LEN))
2278 static struct cifs_ses *
2279 cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
2281 struct cifs_ses *ses;
2283 spin_lock(&cifs_tcp_ses_lock);
2284 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2285 if (ses->status == CifsExiting)
2287 if (!match_session(ses, vol))
2290 spin_unlock(&cifs_tcp_ses_lock);
2293 spin_unlock(&cifs_tcp_ses_lock);
2298 cifs_put_smb_ses(struct cifs_ses *ses)
2300 unsigned int rc, xid;
2301 struct TCP_Server_Info *server = ses->server;
2303 cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count);
2305 spin_lock(&cifs_tcp_ses_lock);
2306 if (ses->status == CifsExiting) {
2307 spin_unlock(&cifs_tcp_ses_lock);
2310 if (--ses->ses_count > 0) {
2311 spin_unlock(&cifs_tcp_ses_lock);
2314 if (ses->status == CifsGood)
2315 ses->status = CifsExiting;
2316 spin_unlock(&cifs_tcp_ses_lock);
2318 if (ses->status == CifsExiting && server->ops->logoff) {
2320 rc = server->ops->logoff(xid, ses);
2322 cifs_dbg(VFS, "%s: Session Logoff failure rc=%d\n",
2327 spin_lock(&cifs_tcp_ses_lock);
2328 list_del_init(&ses->smb_ses_list);
2329 spin_unlock(&cifs_tcp_ses_lock);
2332 cifs_put_tcp_session(server);
2337 /* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */
2338 #define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1)
2340 /* Populate username and pw fields from keyring if possible */
2342 cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
2345 const char *delim, *payload;
2349 struct TCP_Server_Info *server = ses->server;
2350 struct sockaddr_in *sa;
2351 struct sockaddr_in6 *sa6;
2352 const struct user_key_payload *upayload;
2354 desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL);
2358 /* try to find an address key first */
2359 switch (server->dstaddr.ss_family) {
2361 sa = (struct sockaddr_in *)&server->dstaddr;
2362 sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr);
2365 sa6 = (struct sockaddr_in6 *)&server->dstaddr;
2366 sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr);
2369 cifs_dbg(FYI, "Bad ss_family (%hu)\n",
2370 server->dstaddr.ss_family);
2375 cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc);
2376 key = request_key(&key_type_logon, desc, "");
2378 if (!ses->domainName) {
2379 cifs_dbg(FYI, "domainName is NULL\n");
2384 /* didn't work, try to find a domain key */
2385 sprintf(desc, "cifs:d:%s", ses->domainName);
2386 cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc);
2387 key = request_key(&key_type_logon, desc, "");
2394 down_read(&key->sem);
2395 upayload = user_key_payload(key);
2396 if (IS_ERR_OR_NULL(upayload)) {
2397 rc = upayload ? PTR_ERR(upayload) : -EINVAL;
2401 /* find first : in payload */
2402 payload = upayload->data;
2403 delim = strnchr(payload, upayload->datalen, ':');
2404 cifs_dbg(FYI, "payload=%s\n", payload);
2406 cifs_dbg(FYI, "Unable to find ':' in payload (datalen=%d)\n",
2412 len = delim - payload;
2413 if (len > CIFS_MAX_USERNAME_LEN || len <= 0) {
2414 cifs_dbg(FYI, "Bad value from username search (len=%zd)\n",
2420 vol->username = kstrndup(payload, len, GFP_KERNEL);
2421 if (!vol->username) {
2422 cifs_dbg(FYI, "Unable to allocate %zd bytes for username\n",
2427 cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username);
2429 len = key->datalen - (len + 1);
2430 if (len > CIFS_MAX_PASSWORD_LEN || len <= 0) {
2431 cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len);
2433 kfree(vol->username);
2434 vol->username = NULL;
2439 vol->password = kstrndup(delim, len, GFP_KERNEL);
2440 if (!vol->password) {
2441 cifs_dbg(FYI, "Unable to allocate %zd bytes for password\n",
2444 kfree(vol->username);
2445 vol->username = NULL;
2454 cifs_dbg(FYI, "%s: returning %d\n", __func__, rc);
2457 #else /* ! CONFIG_KEYS */
2459 cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)),
2460 struct cifs_ses *ses __attribute__((unused)))
2464 #endif /* CONFIG_KEYS */
2466 static struct cifs_ses *
2467 cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
2471 struct cifs_ses *ses;
2472 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
2473 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
2477 ses = cifs_find_smb_ses(server, volume_info);
2479 cifs_dbg(FYI, "Existing smb sess found (status=%d)\n",
2482 mutex_lock(&ses->session_mutex);
2483 rc = cifs_negotiate_protocol(xid, ses);
2485 mutex_unlock(&ses->session_mutex);
2486 /* problem -- put our ses reference */
2487 cifs_put_smb_ses(ses);
2491 if (ses->need_reconnect) {
2492 cifs_dbg(FYI, "Session needs reconnect\n");
2493 rc = cifs_setup_session(xid, ses,
2494 volume_info->local_nls);
2496 mutex_unlock(&ses->session_mutex);
2497 /* problem -- put our reference */
2498 cifs_put_smb_ses(ses);
2503 mutex_unlock(&ses->session_mutex);
2505 /* existing SMB ses has a server reference already */
2506 cifs_put_tcp_session(server);
2511 cifs_dbg(FYI, "Existing smb sess not found\n");
2512 ses = sesInfoAlloc();
2516 /* new SMB session uses our server ref */
2517 ses->server = server;
2518 if (server->dstaddr.ss_family == AF_INET6)
2519 sprintf(ses->serverName, "%pI6", &addr6->sin6_addr);
2521 sprintf(ses->serverName, "%pI4", &addr->sin_addr);
2523 if (volume_info->username) {
2524 ses->user_name = kstrdup(volume_info->username, GFP_KERNEL);
2525 if (!ses->user_name)
2529 /* volume_info->password freed at unmount */
2530 if (volume_info->password) {
2531 ses->password = kstrdup(volume_info->password, GFP_KERNEL);
2535 if (volume_info->domainname) {
2536 ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL);
2537 if (!ses->domainName)
2540 ses->cred_uid = volume_info->cred_uid;
2541 ses->linux_uid = volume_info->linux_uid;
2543 ses->sectype = volume_info->sectype;
2544 ses->sign = volume_info->sign;
2546 mutex_lock(&ses->session_mutex);
2547 rc = cifs_negotiate_protocol(xid, ses);
2549 rc = cifs_setup_session(xid, ses, volume_info->local_nls);
2550 mutex_unlock(&ses->session_mutex);
2554 /* success, put it on the list */
2555 spin_lock(&cifs_tcp_ses_lock);
2556 list_add(&ses->smb_ses_list, &server->smb_ses_list);
2557 spin_unlock(&cifs_tcp_ses_lock);
2568 static int match_tcon(struct cifs_tcon *tcon, const char *unc)
2570 if (tcon->tidStatus == CifsExiting)
2572 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
2577 static struct cifs_tcon *
2578 cifs_find_tcon(struct cifs_ses *ses, const char *unc)
2580 struct list_head *tmp;
2581 struct cifs_tcon *tcon;
2583 spin_lock(&cifs_tcp_ses_lock);
2584 list_for_each(tmp, &ses->tcon_list) {
2585 tcon = list_entry(tmp, struct cifs_tcon, tcon_list);
2586 if (!match_tcon(tcon, unc))
2589 spin_unlock(&cifs_tcp_ses_lock);
2592 spin_unlock(&cifs_tcp_ses_lock);
2597 cifs_put_tcon(struct cifs_tcon *tcon)
2600 struct cifs_ses *ses = tcon->ses;
2602 cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count);
2603 spin_lock(&cifs_tcp_ses_lock);
2604 if (--tcon->tc_count > 0) {
2605 spin_unlock(&cifs_tcp_ses_lock);
2609 list_del_init(&tcon->tcon_list);
2610 spin_unlock(&cifs_tcp_ses_lock);
2613 if (ses->server->ops->tree_disconnect)
2614 ses->server->ops->tree_disconnect(xid, tcon);
2617 cifs_fscache_release_super_cookie(tcon);
2619 cifs_put_smb_ses(ses);
2622 static struct cifs_tcon *
2623 cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
2626 struct cifs_tcon *tcon;
2628 tcon = cifs_find_tcon(ses, volume_info->UNC);
2630 cifs_dbg(FYI, "Found match on UNC path\n");
2631 /* existing tcon already has a reference */
2632 cifs_put_smb_ses(ses);
2633 if (tcon->seal != volume_info->seal)
2634 cifs_dbg(VFS, "transport encryption setting conflicts with existing tid\n");
2638 if (!ses->server->ops->tree_connect) {
2643 tcon = tconInfoAlloc();
2650 if (volume_info->password) {
2651 tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
2652 if (!tcon->password) {
2659 * BB Do we need to wrap session_mutex around this TCon call and Unix
2660 * SetFS as we do on SessSetup and reconnect?
2663 rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon,
2664 volume_info->local_nls);
2666 cifs_dbg(FYI, "Tcon rc = %d\n", rc);
2670 if (volume_info->nodfs) {
2671 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
2672 cifs_dbg(FYI, "DFS disabled (%d)\n", tcon->Flags);
2674 tcon->seal = volume_info->seal;
2675 tcon->use_persistent = false;
2676 /* check if SMB2 or later, CIFS does not support persistent handles */
2677 if (volume_info->persistent) {
2678 if (ses->server->vals->protocol_id == 0) {
2680 "SMB3 or later required for persistent handles\n");
2683 #ifdef CONFIG_CIFS_SMB2
2684 } else if (ses->server->capabilities &
2685 SMB2_GLOBAL_CAP_PERSISTENT_HANDLES)
2686 tcon->use_persistent = true;
2687 else /* persistent handles requested but not supported */ {
2689 "Persistent handles not supported on share\n");
2692 #endif /* CONFIG_CIFS_SMB2 */
2694 #ifdef CONFIG_CIFS_SMB2
2695 } else if ((tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
2696 && (ses->server->capabilities & SMB2_GLOBAL_CAP_PERSISTENT_HANDLES)
2697 && (volume_info->nopersistent == false)) {
2698 cifs_dbg(FYI, "enabling persistent handles\n");
2699 tcon->use_persistent = true;
2700 #endif /* CONFIG_CIFS_SMB2 */
2701 } else if (volume_info->resilient) {
2702 if (ses->server->vals->protocol_id == 0) {
2704 "SMB2.1 or later required for resilient handles\n");
2708 tcon->use_resilient = true;
2712 * We can have only one retry value for a connection to a share so for
2713 * resources mounted more than once to the same server share the last
2714 * value passed in for the retry flag is used.
2716 tcon->retry = volume_info->retry;
2717 tcon->nocase = volume_info->nocase;
2718 tcon->local_lease = volume_info->local_lease;
2719 INIT_LIST_HEAD(&tcon->pending_opens);
2721 spin_lock(&cifs_tcp_ses_lock);
2722 list_add(&tcon->tcon_list, &ses->tcon_list);
2723 spin_unlock(&cifs_tcp_ses_lock);
2725 cifs_fscache_get_super_cookie(tcon);
2735 cifs_put_tlink(struct tcon_link *tlink)
2737 if (!tlink || IS_ERR(tlink))
2740 if (!atomic_dec_and_test(&tlink->tl_count) ||
2741 test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) {
2742 tlink->tl_time = jiffies;
2746 if (!IS_ERR(tlink_tcon(tlink)))
2747 cifs_put_tcon(tlink_tcon(tlink));
2752 static inline struct tcon_link *
2753 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
2755 return cifs_sb->master_tlink;
2759 compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data)
2761 struct cifs_sb_info *old = CIFS_SB(sb);
2762 struct cifs_sb_info *new = mnt_data->cifs_sb;
2764 if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK))
2767 if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) !=
2768 (new->mnt_cifs_flags & CIFS_MOUNT_MASK))
2772 * We want to share sb only if we don't specify an r/wsize or
2773 * specified r/wsize is greater than or equal to existing one.
2775 if (new->wsize && new->wsize < old->wsize)
2778 if (new->rsize && new->rsize < old->rsize)
2781 if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid))
2784 if (old->mnt_file_mode != new->mnt_file_mode ||
2785 old->mnt_dir_mode != new->mnt_dir_mode)
2788 if (strcmp(old->local_nls->charset, new->local_nls->charset))
2791 if (old->actimeo != new->actimeo)
2798 match_prepath(struct super_block *sb, struct cifs_mnt_data *mnt_data)
2800 struct cifs_sb_info *old = CIFS_SB(sb);
2801 struct cifs_sb_info *new = mnt_data->cifs_sb;
2803 if (old->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) {
2804 if (!(new->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH))
2806 /* The prepath should be null terminated strings */
2807 if (strcmp(new->prepath, old->prepath))
2816 cifs_match_super(struct super_block *sb, void *data)
2818 struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data;
2819 struct smb_vol *volume_info;
2820 struct cifs_sb_info *cifs_sb;
2821 struct TCP_Server_Info *tcp_srv;
2822 struct cifs_ses *ses;
2823 struct cifs_tcon *tcon;
2824 struct tcon_link *tlink;
2827 spin_lock(&cifs_tcp_ses_lock);
2828 cifs_sb = CIFS_SB(sb);
2829 tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
2830 if (IS_ERR(tlink)) {
2831 spin_unlock(&cifs_tcp_ses_lock);
2834 tcon = tlink_tcon(tlink);
2836 tcp_srv = ses->server;
2838 volume_info = mnt_data->vol;
2840 if (!match_server(tcp_srv, volume_info) ||
2841 !match_session(ses, volume_info) ||
2842 !match_tcon(tcon, volume_info->UNC) ||
2843 !match_prepath(sb, mnt_data)) {
2848 rc = compare_mount_options(sb, mnt_data);
2850 spin_unlock(&cifs_tcp_ses_lock);
2851 cifs_put_tlink(tlink);
2856 get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path,
2857 const struct nls_table *nls_codepage, unsigned int *num_referrals,
2858 struct dfs_info3_param **referrals, int remap)
2863 if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer)
2869 if (ses->ipc_tid == 0) {
2870 temp_unc = kmalloc(2 /* for slashes */ +
2871 strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2)
2872 + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL);
2873 if (temp_unc == NULL)
2877 strcpy(temp_unc + 2, ses->serverName);
2878 strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$");
2879 rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL,
2881 cifs_dbg(FYI, "Tcon rc = %d ipc_tid = %d\n", rc, ses->ipc_tid);
2885 rc = ses->server->ops->get_dfs_refer(xid, ses, old_path,
2886 referrals, num_referrals,
2887 nls_codepage, remap);
2889 * BB - map targetUNCs to dfs_info3 structures, here or in
2890 * ses->server->ops->get_dfs_refer.
2896 #ifdef CONFIG_DEBUG_LOCK_ALLOC
2897 static struct lock_class_key cifs_key[2];
2898 static struct lock_class_key cifs_slock_key[2];
2901 cifs_reclassify_socket4(struct socket *sock)
2903 struct sock *sk = sock->sk;
2904 BUG_ON(!sock_allow_reclassification(sk));
2905 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
2906 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
2910 cifs_reclassify_socket6(struct socket *sock)
2912 struct sock *sk = sock->sk;
2913 BUG_ON(!sock_allow_reclassification(sk));
2914 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
2915 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
2919 cifs_reclassify_socket4(struct socket *sock)
2924 cifs_reclassify_socket6(struct socket *sock)
2929 /* See RFC1001 section 14 on representation of Netbios names */
2930 static void rfc1002mangle(char *target, char *source, unsigned int length)
2934 for (i = 0, j = 0; i < (length); i++) {
2935 /* mask a nibble at a time and encode */
2936 target[j] = 'A' + (0x0F & (source[i] >> 4));
2937 target[j+1] = 'A' + (0x0F & source[i]);
2944 bind_socket(struct TCP_Server_Info *server)
2947 if (server->srcaddr.ss_family != AF_UNSPEC) {
2948 /* Bind to the specified local IP address */
2949 struct socket *socket = server->ssocket;
2950 rc = socket->ops->bind(socket,
2951 (struct sockaddr *) &server->srcaddr,
2952 sizeof(server->srcaddr));
2954 struct sockaddr_in *saddr4;
2955 struct sockaddr_in6 *saddr6;
2956 saddr4 = (struct sockaddr_in *)&server->srcaddr;
2957 saddr6 = (struct sockaddr_in6 *)&server->srcaddr;
2958 if (saddr6->sin6_family == AF_INET6)
2959 cifs_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n",
2960 &saddr6->sin6_addr, rc);
2962 cifs_dbg(VFS, "Failed to bind to: %pI4, error: %d\n",
2963 &saddr4->sin_addr.s_addr, rc);
2970 ip_rfc1001_connect(struct TCP_Server_Info *server)
2974 * some servers require RFC1001 sessinit before sending
2975 * negprot - BB check reconnection in case where second
2976 * sessinit is sent but no second negprot
2978 struct rfc1002_session_packet *ses_init_buf;
2979 struct smb_hdr *smb_buf;
2980 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
2983 ses_init_buf->trailer.session_req.called_len = 32;
2985 if (server->server_RFC1001_name[0] != 0)
2986 rfc1002mangle(ses_init_buf->trailer.
2987 session_req.called_name,
2988 server->server_RFC1001_name,
2989 RFC1001_NAME_LEN_WITH_NULL);
2991 rfc1002mangle(ses_init_buf->trailer.
2992 session_req.called_name,
2993 DEFAULT_CIFS_CALLED_NAME,
2994 RFC1001_NAME_LEN_WITH_NULL);
2996 ses_init_buf->trailer.session_req.calling_len = 32;
2999 * calling name ends in null (byte 16) from old smb
3002 if (server->workstation_RFC1001_name[0] != 0)
3003 rfc1002mangle(ses_init_buf->trailer.
3004 session_req.calling_name,
3005 server->workstation_RFC1001_name,
3006 RFC1001_NAME_LEN_WITH_NULL);
3008 rfc1002mangle(ses_init_buf->trailer.
3009 session_req.calling_name,
3011 RFC1001_NAME_LEN_WITH_NULL);
3013 ses_init_buf->trailer.session_req.scope1 = 0;
3014 ses_init_buf->trailer.session_req.scope2 = 0;
3015 smb_buf = (struct smb_hdr *)ses_init_buf;
3017 /* sizeof RFC1002_SESSION_REQUEST with no scope */
3018 smb_buf->smb_buf_length = cpu_to_be32(0x81000044);
3019 rc = smb_send(server, smb_buf, 0x44);
3020 kfree(ses_init_buf);
3022 * RFC1001 layer in at least one server
3023 * requires very short break before negprot
3024 * presumably because not expecting negprot
3025 * to follow so fast. This is a simple
3026 * solution that works without
3027 * complicating the code and causes no
3028 * significant slowing down on mount
3031 usleep_range(1000, 2000);
3034 * else the negprot may still work without this
3035 * even though malloc failed
3042 generic_ip_connect(struct TCP_Server_Info *server)
3047 struct socket *socket = server->ssocket;
3048 struct sockaddr *saddr;
3050 saddr = (struct sockaddr *) &server->dstaddr;
3052 if (server->dstaddr.ss_family == AF_INET6) {
3053 sport = ((struct sockaddr_in6 *) saddr)->sin6_port;
3054 slen = sizeof(struct sockaddr_in6);
3057 sport = ((struct sockaddr_in *) saddr)->sin_port;
3058 slen = sizeof(struct sockaddr_in);
3062 if (socket == NULL) {
3063 rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM,
3064 IPPROTO_TCP, &socket, 1);
3066 cifs_dbg(VFS, "Error %d creating socket\n", rc);
3067 server->ssocket = NULL;
3071 /* BB other socket options to set KEEPALIVE, NODELAY? */
3072 cifs_dbg(FYI, "Socket created\n");
3073 server->ssocket = socket;
3074 socket->sk->sk_allocation = GFP_NOFS;
3075 if (sfamily == AF_INET6)
3076 cifs_reclassify_socket6(socket);
3078 cifs_reclassify_socket4(socket);
3081 rc = bind_socket(server);
3086 * Eventually check for other socket options to change from
3087 * the default. sock_setsockopt not used because it expects
3090 socket->sk->sk_rcvtimeo = 7 * HZ;
3091 socket->sk->sk_sndtimeo = 5 * HZ;
3093 /* make the bufsizes depend on wsize/rsize and max requests */
3094 if (server->noautotune) {
3095 if (socket->sk->sk_sndbuf < (200 * 1024))
3096 socket->sk->sk_sndbuf = 200 * 1024;
3097 if (socket->sk->sk_rcvbuf < (140 * 1024))
3098 socket->sk->sk_rcvbuf = 140 * 1024;
3101 if (server->tcp_nodelay) {
3103 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
3104 (char *)&val, sizeof(val));
3106 cifs_dbg(FYI, "set TCP_NODELAY socket option error %d\n",
3110 cifs_dbg(FYI, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n",
3111 socket->sk->sk_sndbuf,
3112 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
3114 rc = socket->ops->connect(socket, saddr, slen, 0);
3116 cifs_dbg(FYI, "Error %d connecting to server\n", rc);
3117 sock_release(socket);
3118 server->ssocket = NULL;
3122 if (sport == htons(RFC1001_PORT))
3123 rc = ip_rfc1001_connect(server);
3129 ip_connect(struct TCP_Server_Info *server)
3132 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
3133 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
3135 if (server->dstaddr.ss_family == AF_INET6)
3136 sport = &addr6->sin6_port;
3138 sport = &addr->sin_port;
3143 /* try with 445 port at first */
3144 *sport = htons(CIFS_PORT);
3146 rc = generic_ip_connect(server);
3150 /* if it failed, try with 139 port */
3151 *sport = htons(RFC1001_PORT);
3154 return generic_ip_connect(server);
3157 void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon,
3158 struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info)
3160 /* if we are reconnecting then should we check to see if
3161 * any requested capabilities changed locally e.g. via
3162 * remount but we can not do much about it here
3163 * if they have (even if we could detect it by the following)
3164 * Perhaps we could add a backpointer to array of sb from tcon
3165 * or if we change to make all sb to same share the same
3166 * sb as NFS - then we only have one backpointer to sb.
3167 * What if we wanted to mount the server share twice once with
3168 * and once without posixacls or posix paths? */
3169 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
3171 if (vol_info && vol_info->no_linux_ext) {
3172 tcon->fsUnixInfo.Capability = 0;
3173 tcon->unix_ext = 0; /* Unix Extensions disabled */
3174 cifs_dbg(FYI, "Linux protocol extensions disabled\n");
3176 } else if (vol_info)
3177 tcon->unix_ext = 1; /* Unix Extensions supported */
3179 if (tcon->unix_ext == 0) {
3180 cifs_dbg(FYI, "Unix extensions disabled so not set on reconnect\n");
3184 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
3185 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
3186 cifs_dbg(FYI, "unix caps which server supports %lld\n", cap);
3187 /* check for reconnect case in which we do not
3188 want to change the mount behavior if we can avoid it */
3189 if (vol_info == NULL) {
3190 /* turn off POSIX ACL and PATHNAMES if not set
3191 originally at mount time */
3192 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
3193 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
3194 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
3195 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
3196 cifs_dbg(VFS, "POSIXPATH support change\n");
3197 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
3198 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
3199 cifs_dbg(VFS, "possible reconnect error\n");
3200 cifs_dbg(VFS, "server disabled POSIX path support\n");
3204 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
3205 cifs_dbg(VFS, "per-share encryption not supported yet\n");
3207 cap &= CIFS_UNIX_CAP_MASK;
3208 if (vol_info && vol_info->no_psx_acl)
3209 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
3210 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
3211 cifs_dbg(FYI, "negotiated posix acl support\n");
3213 cifs_sb->mnt_cifs_flags |=
3214 CIFS_MOUNT_POSIXACL;
3217 if (vol_info && vol_info->posix_paths == 0)
3218 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
3219 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
3220 cifs_dbg(FYI, "negotiate posix pathnames\n");
3222 cifs_sb->mnt_cifs_flags |=
3223 CIFS_MOUNT_POSIX_PATHS;
3226 cifs_dbg(FYI, "Negotiate caps 0x%x\n", (int)cap);
3227 #ifdef CONFIG_CIFS_DEBUG2
3228 if (cap & CIFS_UNIX_FCNTL_CAP)
3229 cifs_dbg(FYI, "FCNTL cap\n");
3230 if (cap & CIFS_UNIX_EXTATTR_CAP)
3231 cifs_dbg(FYI, "EXTATTR cap\n");
3232 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
3233 cifs_dbg(FYI, "POSIX path cap\n");
3234 if (cap & CIFS_UNIX_XATTR_CAP)
3235 cifs_dbg(FYI, "XATTR cap\n");
3236 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
3237 cifs_dbg(FYI, "POSIX ACL cap\n");
3238 if (cap & CIFS_UNIX_LARGE_READ_CAP)
3239 cifs_dbg(FYI, "very large read cap\n");
3240 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
3241 cifs_dbg(FYI, "very large write cap\n");
3242 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP)
3243 cifs_dbg(FYI, "transport encryption cap\n");
3244 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
3245 cifs_dbg(FYI, "mandatory transport encryption cap\n");
3246 #endif /* CIFS_DEBUG2 */
3247 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
3248 if (vol_info == NULL) {
3249 cifs_dbg(FYI, "resetting capabilities failed\n");
3251 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");
3257 int cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
3258 struct cifs_sb_info *cifs_sb)
3260 INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks);
3262 spin_lock_init(&cifs_sb->tlink_tree_lock);
3263 cifs_sb->tlink_tree = RB_ROOT;
3266 * Temporarily set r/wsize for matching superblock. If we end up using
3267 * new sb then client will later negotiate it downward if needed.
3269 cifs_sb->rsize = pvolume_info->rsize;
3270 cifs_sb->wsize = pvolume_info->wsize;
3272 cifs_sb->mnt_uid = pvolume_info->linux_uid;
3273 cifs_sb->mnt_gid = pvolume_info->linux_gid;
3274 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
3275 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
3276 cifs_dbg(FYI, "file mode: 0x%hx dir mode: 0x%hx\n",
3277 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
3279 cifs_sb->actimeo = pvolume_info->actimeo;
3280 cifs_sb->local_nls = pvolume_info->local_nls;
3282 if (pvolume_info->noperm)
3283 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
3284 if (pvolume_info->setuids)
3285 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
3286 if (pvolume_info->setuidfromacl)
3287 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UID_FROM_ACL;
3288 if (pvolume_info->server_ino)
3289 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
3290 if (pvolume_info->remap)
3291 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SFM_CHR;
3292 if (pvolume_info->sfu_remap)
3293 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
3294 if (pvolume_info->no_xattr)
3295 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
3296 if (pvolume_info->sfu_emul)
3297 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
3298 if (pvolume_info->nobrl)
3299 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
3300 if (pvolume_info->nostrictsync)
3301 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
3302 if (pvolume_info->mand_lock)
3303 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
3304 if (pvolume_info->rwpidforward)
3305 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
3306 if (pvolume_info->cifs_acl)
3307 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
3308 if (pvolume_info->backupuid_specified) {
3309 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID;
3310 cifs_sb->mnt_backupuid = pvolume_info->backupuid;
3312 if (pvolume_info->backupgid_specified) {
3313 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID;
3314 cifs_sb->mnt_backupgid = pvolume_info->backupgid;
3316 if (pvolume_info->override_uid)
3317 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
3318 if (pvolume_info->override_gid)
3319 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
3320 if (pvolume_info->dynperm)
3321 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
3322 if (pvolume_info->fsc)
3323 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
3324 if (pvolume_info->multiuser)
3325 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
3326 CIFS_MOUNT_NO_PERM);
3327 if (pvolume_info->strict_io)
3328 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
3329 if (pvolume_info->direct_io) {
3330 cifs_dbg(FYI, "mounting share using direct i/o\n");
3331 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
3333 if (pvolume_info->mfsymlinks) {
3334 if (pvolume_info->sfu_emul) {
3336 * Our SFU ("Services for Unix" emulation does not allow
3337 * creating symlinks but does allow reading existing SFU
3338 * symlinks (it does allow both creating and reading SFU
3339 * style mknod and FIFOs though). When "mfsymlinks" and
3340 * "sfu" are both enabled at the same time, it allows
3341 * reading both types of symlinks, but will only create
3342 * them with mfsymlinks format. This allows better
3343 * Apple compatibility (probably better for Samba too)
3344 * while still recognizing old Windows style symlinks.
3346 cifs_dbg(VFS, "mount options mfsymlinks and sfu both enabled\n");
3348 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
3351 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
3352 cifs_dbg(VFS, "mount option dynperm ignored if cifsacl mount option supported\n");
3354 if (pvolume_info->prepath) {
3355 cifs_sb->prepath = kstrdup(pvolume_info->prepath, GFP_KERNEL);
3356 if (cifs_sb->prepath == NULL)
3364 cleanup_volume_info_contents(struct smb_vol *volume_info)
3366 kfree(volume_info->username);
3367 kzfree(volume_info->password);
3368 kfree(volume_info->UNC);
3369 kfree(volume_info->domainname);
3370 kfree(volume_info->iocharset);
3371 kfree(volume_info->prepath);
3375 cifs_cleanup_volume_info(struct smb_vol *volume_info)
3379 cleanup_volume_info_contents(volume_info);
3384 #ifdef CONFIG_CIFS_DFS_UPCALL
3386 * cifs_build_path_to_root returns full path to root when we do not have an
3387 * exiting connection (tcon)
3390 build_unc_path_to_root(const struct smb_vol *vol,
3391 const struct cifs_sb_info *cifs_sb)
3393 char *full_path, *pos;
3394 unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0;
3395 unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1);
3397 full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL);
3398 if (full_path == NULL)
3399 return ERR_PTR(-ENOMEM);
3401 strncpy(full_path, vol->UNC, unc_len);
3402 pos = full_path + unc_len;
3405 *pos = CIFS_DIR_SEP(cifs_sb);
3406 strncpy(pos + 1, vol->prepath, pplen);
3410 *pos = '\0'; /* add trailing null */
3411 convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
3412 cifs_dbg(FYI, "%s: full_path=%s\n", __func__, full_path);
3417 * Perform a dfs referral query for a share and (optionally) prefix
3419 * If a referral is found, cifs_sb->mountdata will be (re-)allocated
3420 * to a string containing updated options for the submount. Otherwise it
3421 * will be left untouched.
3423 * Returns the rc from get_dfs_path to the caller, which can be used to
3424 * determine whether there were referrals.
3427 expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses,
3428 struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb,
3432 unsigned int num_referrals = 0;
3433 struct dfs_info3_param *referrals = NULL;
3434 char *full_path = NULL, *ref_path = NULL, *mdata = NULL;
3436 full_path = build_unc_path_to_root(volume_info, cifs_sb);
3437 if (IS_ERR(full_path))
3438 return PTR_ERR(full_path);
3440 /* For DFS paths, skip the first '\' of the UNC */
3441 ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1;
3443 rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls,
3444 &num_referrals, &referrals, cifs_remap(cifs_sb));
3446 if (!rc && num_referrals > 0) {
3447 char *fake_devname = NULL;
3449 mdata = cifs_compose_mount_options(cifs_sb->mountdata,
3450 full_path + 1, referrals,
3453 free_dfs_info_array(referrals, num_referrals);
3455 if (IS_ERR(mdata)) {
3456 rc = PTR_ERR(mdata);
3459 cleanup_volume_info_contents(volume_info);
3460 rc = cifs_setup_volume_info(volume_info, mdata,
3463 kfree(fake_devname);
3464 kfree(cifs_sb->mountdata);
3465 cifs_sb->mountdata = mdata;
3473 cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
3474 const char *devname)
3478 if (cifs_parse_mount_options(mount_data, devname, volume_info))
3481 if (volume_info->nullauth) {
3482 cifs_dbg(FYI, "Anonymous login\n");
3483 kfree(volume_info->username);
3484 volume_info->username = NULL;
3485 } else if (volume_info->username) {
3486 /* BB fixme parse for domain name here */
3487 cifs_dbg(FYI, "Username: %s\n", volume_info->username);
3489 cifs_dbg(VFS, "No username specified\n");
3490 /* In userspace mount helper we can get user name from alternate
3491 locations such as env variables and files on disk */
3495 /* this is needed for ASCII cp to Unicode converts */
3496 if (volume_info->iocharset == NULL) {
3497 /* load_nls_default cannot return null */
3498 volume_info->local_nls = load_nls_default();
3500 volume_info->local_nls = load_nls(volume_info->iocharset);
3501 if (volume_info->local_nls == NULL) {
3502 cifs_dbg(VFS, "CIFS mount error: iocharset %s not found\n",
3503 volume_info->iocharset);
3512 cifs_get_volume_info(char *mount_data, const char *devname)
3515 struct smb_vol *volume_info;
3517 volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL);
3519 return ERR_PTR(-ENOMEM);
3521 rc = cifs_setup_volume_info(volume_info, mount_data, devname);
3523 cifs_cleanup_volume_info(volume_info);
3524 volume_info = ERR_PTR(rc);
3531 cifs_are_all_path_components_accessible(struct TCP_Server_Info *server,
3533 struct cifs_tcon *tcon,
3534 struct cifs_sb_info *cifs_sb,
3541 sep = CIFS_DIR_SEP(cifs_sb);
3544 rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, "");
3546 /* skip separators */
3551 /* next separator */
3552 while (*s && *s != sep)
3556 * temporarily null-terminate the path at the end of
3557 * the current component
3561 rc = server->ops->is_path_accessible(xid, tcon, cifs_sb,
3569 cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
3573 struct cifs_ses *ses;
3574 struct cifs_tcon *tcon;
3575 struct TCP_Server_Info *server;
3577 struct tcon_link *tlink;
3578 #ifdef CONFIG_CIFS_DFS_UPCALL
3579 int referral_walks_count = 0;
3582 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs");
3586 #ifdef CONFIG_CIFS_DFS_UPCALL
3588 /* cleanup activities if we're chasing a referral */
3589 if (referral_walks_count) {
3591 cifs_put_tcon(tcon);
3593 cifs_put_smb_ses(ses);
3595 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_POSIX_PATHS;
3609 /* get a reference to a tcp session */
3610 server = cifs_get_tcp_session(volume_info);
3611 if (IS_ERR(server)) {
3612 rc = PTR_ERR(server);
3613 bdi_destroy(&cifs_sb->bdi);
3616 if ((volume_info->max_credits < 20) ||
3617 (volume_info->max_credits > 60000))
3618 server->max_credits = SMB2_MAX_CREDITS_AVAILABLE;
3620 server->max_credits = volume_info->max_credits;
3621 /* get a reference to a SMB session */
3622 ses = cifs_get_smb_ses(server, volume_info);
3626 goto mount_fail_check;
3629 #ifdef CONFIG_CIFS_SMB2
3630 if ((volume_info->persistent == true) && ((ses->server->capabilities &
3631 SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) == 0)) {
3632 cifs_dbg(VFS, "persistent handles not supported by server\n");
3634 goto mount_fail_check;
3636 #endif /* CONFIG_CIFS_SMB2*/
3638 /* search for existing tcon to this server share */
3639 tcon = cifs_get_tcon(ses, volume_info);
3643 goto remote_path_check;
3646 /* tell server which Unix caps we support */
3647 if (cap_unix(tcon->ses)) {
3648 /* reset of caps checks mount to see if unix extensions
3649 disabled for just this mount */
3650 reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info);
3651 if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) &&
3652 (le64_to_cpu(tcon->fsUnixInfo.Capability) &
3653 CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) {
3655 goto mount_fail_check;
3658 tcon->unix_ext = 0; /* server does not support them */
3660 /* do not care if a following call succeed - informational */
3661 if (!tcon->ipc && server->ops->qfs_tcon)
3662 server->ops->qfs_tcon(xid, tcon);
3664 cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info);
3665 cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info);
3667 /* tune readahead according to rsize */
3668 cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_SIZE;
3671 #ifdef CONFIG_CIFS_DFS_UPCALL
3673 * Perform an unconditional check for whether there are DFS
3674 * referrals for this path without prefix, to provide support
3675 * for DFS referrals from w2k8 servers which don't seem to respond
3676 * with PATH_NOT_COVERED to requests that include the prefix.
3677 * Chase the referral if found, otherwise continue normally.
3679 if (referral_walks_count == 0) {
3680 int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb,
3683 referral_walks_count++;
3684 goto try_mount_again;
3689 /* check if a whole path is not remote */
3691 if (!server->ops->is_path_accessible) {
3693 goto mount_fail_check;
3696 * cifs_build_path_to_root works only when we have a valid tcon
3698 full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon);
3699 if (full_path == NULL) {
3701 goto mount_fail_check;
3703 rc = server->ops->is_path_accessible(xid, tcon, cifs_sb,
3705 if (rc != 0 && rc != -EREMOTE) {
3707 goto mount_fail_check;
3710 if (rc != -EREMOTE) {
3711 rc = cifs_are_all_path_components_accessible(server,
3715 cifs_dbg(VFS, "cannot query dirs between root and final path, "
3716 "enabling CIFS_MOUNT_USE_PREFIX_PATH\n");
3717 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH;
3724 /* get referral if needed */
3725 if (rc == -EREMOTE) {
3726 #ifdef CONFIG_CIFS_DFS_UPCALL
3727 if (referral_walks_count > MAX_NESTED_LINKS) {
3729 * BB: when we implement proper loop detection,
3730 * we will remove this check. But now we need it
3731 * to prevent an indefinite loop if 'DFS tree' is
3732 * misconfigured (i.e. has loops).
3735 goto mount_fail_check;
3738 rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true);
3741 referral_walks_count++;
3742 goto try_mount_again;
3744 goto mount_fail_check;
3745 #else /* No DFS support, return error on mount */
3751 goto mount_fail_check;
3753 /* now, hang the tcon off of the superblock */
3754 tlink = kzalloc(sizeof *tlink, GFP_KERNEL);
3755 if (tlink == NULL) {
3757 goto mount_fail_check;
3760 tlink->tl_uid = ses->linux_uid;
3761 tlink->tl_tcon = tcon;
3762 tlink->tl_time = jiffies;
3763 set_bit(TCON_LINK_MASTER, &tlink->tl_flags);
3764 set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3766 cifs_sb->master_tlink = tlink;
3767 spin_lock(&cifs_sb->tlink_tree_lock);
3768 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
3769 spin_unlock(&cifs_sb->tlink_tree_lock);
3771 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
3775 /* on error free sesinfo and tcon struct if needed */
3777 /* If find_unc succeeded then rc == 0 so we can not end */
3778 /* up accidentally freeing someone elses tcon struct */
3780 cifs_put_tcon(tcon);
3782 cifs_put_smb_ses(ses);
3784 cifs_put_tcp_session(server);
3785 bdi_destroy(&cifs_sb->bdi);
3794 * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon
3795 * pointer may be NULL.
3798 CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
3799 const char *tree, struct cifs_tcon *tcon,
3800 const struct nls_table *nls_codepage)
3802 struct smb_hdr *smb_buffer;
3803 struct smb_hdr *smb_buffer_response;
3806 unsigned char *bcc_ptr;
3809 __u16 bytes_left, count;
3814 smb_buffer = cifs_buf_get();
3815 if (smb_buffer == NULL)
3818 smb_buffer_response = smb_buffer;
3820 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3821 NULL /*no tid */ , 4 /*wct */ );
3823 smb_buffer->Mid = get_next_mid(ses->server);
3824 smb_buffer->Uid = ses->Suid;
3825 pSMB = (TCONX_REQ *) smb_buffer;
3826 pSMBr = (TCONX_RSP *) smb_buffer_response;
3828 pSMB->AndXCommand = 0xFF;
3829 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3830 bcc_ptr = &pSMB->Password[0];
3831 if (!tcon || (ses->server->sec_mode & SECMODE_USER)) {
3832 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
3833 *bcc_ptr = 0; /* password is null byte */
3834 bcc_ptr++; /* skip password */
3835 /* already aligned so no need to do it below */
3837 pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
3838 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3839 specified as required (when that support is added to
3840 the vfs in the future) as only NTLM or the much
3841 weaker LANMAN (which we do not send by default) is accepted
3842 by Samba (not sure whether other servers allow
3843 NTLMv2 password here) */
3844 #ifdef CONFIG_CIFS_WEAK_PW_HASH
3845 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
3846 (ses->sectype == LANMAN))
3847 calc_lanman_hash(tcon->password, ses->server->cryptkey,
3848 ses->server->sec_mode &
3849 SECMODE_PW_ENCRYPT ? true : false,
3852 #endif /* CIFS_WEAK_PW_HASH */
3853 rc = SMBNTencrypt(tcon->password, ses->server->cryptkey,
3854 bcc_ptr, nls_codepage);
3856 cifs_dbg(FYI, "%s Can't generate NTLM rsp. Error: %d\n",
3858 cifs_buf_release(smb_buffer);
3862 bcc_ptr += CIFS_AUTH_RESP_SIZE;
3863 if (ses->capabilities & CAP_UNICODE) {
3864 /* must align unicode strings */
3865 *bcc_ptr = 0; /* null byte password */
3870 if (ses->server->sign)
3871 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3873 if (ses->capabilities & CAP_STATUS32) {
3874 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3876 if (ses->capabilities & CAP_DFS) {
3877 smb_buffer->Flags2 |= SMBFLG2_DFS;
3879 if (ses->capabilities & CAP_UNICODE) {
3880 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3882 cifs_strtoUTF16((__le16 *) bcc_ptr, tree,
3883 6 /* max utf8 char length in bytes */ *
3884 (/* server len*/ + 256 /* share len */), nls_codepage);
3885 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
3886 bcc_ptr += 2; /* skip trailing null */
3887 } else { /* ASCII */
3888 strcpy(bcc_ptr, tree);
3889 bcc_ptr += strlen(tree) + 1;
3891 strcpy(bcc_ptr, "?????");
3892 bcc_ptr += strlen("?????");
3894 count = bcc_ptr - &pSMB->Password[0];
3895 pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu(
3896 pSMB->hdr.smb_buf_length) + count);
3897 pSMB->ByteCount = cpu_to_le16(count);
3899 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
3902 /* above now done in SendReceive */
3903 if ((rc == 0) && (tcon != NULL)) {
3906 tcon->tidStatus = CifsGood;
3907 tcon->need_reconnect = false;
3908 tcon->tid = smb_buffer_response->Tid;
3909 bcc_ptr = pByteArea(smb_buffer_response);
3910 bytes_left = get_bcc(smb_buffer_response);
3911 length = strnlen(bcc_ptr, bytes_left - 2);
3912 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
3918 /* skip service field (NB: this field is always ASCII) */
3920 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3921 (bcc_ptr[2] == 'C')) {
3922 cifs_dbg(FYI, "IPC connection\n");
3925 } else if (length == 2) {
3926 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3927 /* the most common case */
3928 cifs_dbg(FYI, "disk share connection\n");
3931 bcc_ptr += length + 1;
3932 bytes_left -= (length + 1);
3933 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
3935 /* mostly informational -- no need to fail on error here */
3936 kfree(tcon->nativeFileSystem);
3937 tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr,
3938 bytes_left, is_unicode,
3941 cifs_dbg(FYI, "nativeFileSystem=%s\n", tcon->nativeFileSystem);
3943 if ((smb_buffer_response->WordCount == 3) ||
3944 (smb_buffer_response->WordCount == 7))
3945 /* field is in same location */
3946 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3949 cifs_dbg(FYI, "Tcon flags: 0x%x\n", tcon->Flags);
3950 } else if ((rc == 0) && tcon == NULL) {
3951 /* all we need to save for IPC$ connection */
3952 ses->ipc_tid = smb_buffer_response->Tid;
3955 cifs_buf_release(smb_buffer);
3959 static void delayed_free(struct rcu_head *p)
3961 struct cifs_sb_info *sbi = container_of(p, struct cifs_sb_info, rcu);
3962 unload_nls(sbi->local_nls);
3967 cifs_umount(struct cifs_sb_info *cifs_sb)
3969 struct rb_root *root = &cifs_sb->tlink_tree;
3970 struct rb_node *node;
3971 struct tcon_link *tlink;
3973 cancel_delayed_work_sync(&cifs_sb->prune_tlinks);
3975 spin_lock(&cifs_sb->tlink_tree_lock);
3976 while ((node = rb_first(root))) {
3977 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3978 cifs_get_tlink(tlink);
3979 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3980 rb_erase(node, root);
3982 spin_unlock(&cifs_sb->tlink_tree_lock);
3983 cifs_put_tlink(tlink);
3984 spin_lock(&cifs_sb->tlink_tree_lock);
3986 spin_unlock(&cifs_sb->tlink_tree_lock);
3988 bdi_destroy(&cifs_sb->bdi);
3989 kfree(cifs_sb->mountdata);
3990 kfree(cifs_sb->prepath);
3991 call_rcu(&cifs_sb->rcu, delayed_free);
3995 cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses)
3998 struct TCP_Server_Info *server = ses->server;
4000 if (!server->ops->need_neg || !server->ops->negotiate)
4003 /* only send once per connect */
4004 if (!server->ops->need_neg(server))
4007 set_credits(server, 1);
4009 rc = server->ops->negotiate(xid, ses);
4011 spin_lock(&GlobalMid_Lock);
4012 if (server->tcpStatus == CifsNeedNegotiate)
4013 server->tcpStatus = CifsGood;
4016 spin_unlock(&GlobalMid_Lock);
4023 cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
4024 struct nls_table *nls_info)
4027 struct TCP_Server_Info *server = ses->server;
4029 ses->capabilities = server->capabilities;
4030 if (linuxExtEnabled == 0)
4031 ses->capabilities &= (~server->vals->cap_unix);
4033 cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n",
4034 server->sec_mode, server->capabilities, server->timeAdj);
4036 if (server->ops->sess_setup)
4037 rc = server->ops->sess_setup(xid, ses, nls_info);
4040 cifs_dbg(VFS, "Send error in SessSetup = %d\n", rc);
4046 cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses)
4048 vol->sectype = ses->sectype;
4050 /* krb5 is special, since we don't need username or pw */
4051 if (vol->sectype == Kerberos)
4054 return cifs_set_cifscreds(vol, ses);
4057 static struct cifs_tcon *
4058 cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid)
4061 struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb);
4062 struct cifs_ses *ses;
4063 struct cifs_tcon *tcon = NULL;
4064 struct smb_vol *vol_info;
4066 vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL);
4067 if (vol_info == NULL)
4068 return ERR_PTR(-ENOMEM);
4070 vol_info->local_nls = cifs_sb->local_nls;
4071 vol_info->linux_uid = fsuid;
4072 vol_info->cred_uid = fsuid;
4073 vol_info->UNC = master_tcon->treeName;
4074 vol_info->retry = master_tcon->retry;
4075 vol_info->nocase = master_tcon->nocase;
4076 vol_info->local_lease = master_tcon->local_lease;
4077 vol_info->no_linux_ext = !master_tcon->unix_ext;
4078 vol_info->sectype = master_tcon->ses->sectype;
4079 vol_info->sign = master_tcon->ses->sign;
4081 rc = cifs_set_vol_auth(vol_info, master_tcon->ses);
4087 /* get a reference for the same TCP session */
4088 spin_lock(&cifs_tcp_ses_lock);
4089 ++master_tcon->ses->server->srv_count;
4090 spin_unlock(&cifs_tcp_ses_lock);
4092 ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info);
4094 tcon = (struct cifs_tcon *)ses;
4095 cifs_put_tcp_session(master_tcon->ses->server);
4099 tcon = cifs_get_tcon(ses, vol_info);
4101 cifs_put_smb_ses(ses);
4106 reset_cifs_unix_caps(0, tcon, NULL, vol_info);
4108 kfree(vol_info->username);
4109 kfree(vol_info->password);
4116 cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb)
4118 return tlink_tcon(cifs_sb_master_tlink(cifs_sb));
4121 /* find and return a tlink with given uid */
4122 static struct tcon_link *
4123 tlink_rb_search(struct rb_root *root, kuid_t uid)
4125 struct rb_node *node = root->rb_node;
4126 struct tcon_link *tlink;
4129 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
4131 if (uid_gt(tlink->tl_uid, uid))
4132 node = node->rb_left;
4133 else if (uid_lt(tlink->tl_uid, uid))
4134 node = node->rb_right;
4141 /* insert a tcon_link into the tree */
4143 tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink)
4145 struct rb_node **new = &(root->rb_node), *parent = NULL;
4146 struct tcon_link *tlink;
4149 tlink = rb_entry(*new, struct tcon_link, tl_rbnode);
4152 if (uid_gt(tlink->tl_uid, new_tlink->tl_uid))
4153 new = &((*new)->rb_left);
4155 new = &((*new)->rb_right);
4158 rb_link_node(&new_tlink->tl_rbnode, parent, new);
4159 rb_insert_color(&new_tlink->tl_rbnode, root);
4163 * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the
4166 * If the superblock doesn't refer to a multiuser mount, then just return
4167 * the master tcon for the mount.
4169 * First, search the rbtree for an existing tcon for this fsuid. If one
4170 * exists, then check to see if it's pending construction. If it is then wait
4171 * for construction to complete. Once it's no longer pending, check to see if
4172 * it failed and either return an error or retry construction, depending on
4175 * If one doesn't exist then insert a new tcon_link struct into the tree and
4176 * try to construct a new one.
4179 cifs_sb_tlink(struct cifs_sb_info *cifs_sb)
4182 kuid_t fsuid = current_fsuid();
4183 struct tcon_link *tlink, *newtlink;
4185 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER))
4186 return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
4188 spin_lock(&cifs_sb->tlink_tree_lock);
4189 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
4191 cifs_get_tlink(tlink);
4192 spin_unlock(&cifs_sb->tlink_tree_lock);
4194 if (tlink == NULL) {
4195 newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL);
4196 if (newtlink == NULL)
4197 return ERR_PTR(-ENOMEM);
4198 newtlink->tl_uid = fsuid;
4199 newtlink->tl_tcon = ERR_PTR(-EACCES);
4200 set_bit(TCON_LINK_PENDING, &newtlink->tl_flags);
4201 set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags);
4202 cifs_get_tlink(newtlink);
4204 spin_lock(&cifs_sb->tlink_tree_lock);
4205 /* was one inserted after previous search? */
4206 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
4208 cifs_get_tlink(tlink);
4209 spin_unlock(&cifs_sb->tlink_tree_lock);
4211 goto wait_for_construction;
4214 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
4215 spin_unlock(&cifs_sb->tlink_tree_lock);
4217 wait_for_construction:
4218 ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING,
4219 TASK_INTERRUPTIBLE);
4221 cifs_put_tlink(tlink);
4222 return ERR_PTR(-ERESTARTSYS);
4225 /* if it's good, return it */
4226 if (!IS_ERR(tlink->tl_tcon))
4229 /* return error if we tried this already recently */
4230 if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) {
4231 cifs_put_tlink(tlink);
4232 return ERR_PTR(-EACCES);
4235 if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags))
4236 goto wait_for_construction;
4239 tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid);
4240 clear_bit(TCON_LINK_PENDING, &tlink->tl_flags);
4241 wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING);
4243 if (IS_ERR(tlink->tl_tcon)) {
4244 cifs_put_tlink(tlink);
4245 return ERR_PTR(-EACCES);
4252 * periodic workqueue job that scans tcon_tree for a superblock and closes
4256 cifs_prune_tlinks(struct work_struct *work)
4258 struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info,
4260 struct rb_root *root = &cifs_sb->tlink_tree;
4261 struct rb_node *node = rb_first(root);
4262 struct rb_node *tmp;
4263 struct tcon_link *tlink;
4266 * Because we drop the spinlock in the loop in order to put the tlink
4267 * it's not guarded against removal of links from the tree. The only
4268 * places that remove entries from the tree are this function and
4269 * umounts. Because this function is non-reentrant and is canceled
4270 * before umount can proceed, this is safe.
4272 spin_lock(&cifs_sb->tlink_tree_lock);
4273 node = rb_first(root);
4274 while (node != NULL) {
4276 node = rb_next(tmp);
4277 tlink = rb_entry(tmp, struct tcon_link, tl_rbnode);
4279 if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) ||
4280 atomic_read(&tlink->tl_count) != 0 ||
4281 time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies))
4284 cifs_get_tlink(tlink);
4285 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
4286 rb_erase(tmp, root);
4288 spin_unlock(&cifs_sb->tlink_tree_lock);
4289 cifs_put_tlink(tlink);
4290 spin_lock(&cifs_sb->tlink_tree_lock);
4292 spin_unlock(&cifs_sb->tlink_tree_lock);
4294 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,