4 * Copyright (C) International Business Machines Corp., 2002,2011
5 * Author(s): Steve French (sfrench@us.ibm.com)
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include <linux/net.h>
23 #include <linux/string.h>
24 #include <linux/list.h>
25 #include <linux/wait.h>
26 #include <linux/slab.h>
27 #include <linux/pagemap.h>
28 #include <linux/ctype.h>
29 #include <linux/utsname.h>
30 #include <linux/mempool.h>
31 #include <linux/delay.h>
32 #include <linux/completion.h>
33 #include <linux/kthread.h>
34 #include <linux/pagevec.h>
35 #include <linux/freezer.h>
36 #include <linux/namei.h>
37 #include <asm/uaccess.h>
38 #include <asm/processor.h>
39 #include <linux/inet.h>
40 #include <linux/module.h>
41 #include <keys/user-type.h>
43 #include <linux/parser.h>
47 #include "cifsproto.h"
48 #include "cifs_unicode.h"
49 #include "cifs_debug.h"
50 #include "cifs_fs_sb.h"
53 #include "rfc1002pdu.h"
57 #define RFC1001_PORT 139
59 extern mempool_t *cifs_req_poolp;
61 /* FIXME: should these be tunable? */
62 #define TLINK_ERROR_EXPIRE (1 * HZ)
63 #define TLINK_IDLE_EXPIRE (600 * HZ)
67 /* Mount options that take no arguments */
68 Opt_user_xattr, Opt_nouser_xattr,
69 Opt_forceuid, Opt_noforceuid,
70 Opt_forcegid, Opt_noforcegid,
71 Opt_noblocksend, Opt_noautotune,
72 Opt_hard, Opt_soft, Opt_perm, Opt_noperm,
73 Opt_mapchars, Opt_nomapchars, Opt_sfu,
74 Opt_nosfu, Opt_nodfs, Opt_posixpaths,
75 Opt_noposixpaths, Opt_nounix,
78 Opt_forcemandatorylock, Opt_setuids,
79 Opt_nosetuids, Opt_dynperm, Opt_nodynperm,
80 Opt_nohard, Opt_nosoft,
82 Opt_nostrictsync, Opt_strictsync,
83 Opt_serverino, Opt_noserverino,
84 Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl,
85 Opt_acl, Opt_noacl, Opt_locallease,
86 Opt_sign, Opt_seal, Opt_noac,
87 Opt_fsc, Opt_mfsymlinks,
88 Opt_multiuser, Opt_sloppy, Opt_nosharesock,
90 /* Mount options which take numeric value */
91 Opt_backupuid, Opt_backupgid, Opt_uid,
92 Opt_cruid, Opt_gid, Opt_file_mode,
93 Opt_dirmode, Opt_port,
94 Opt_rsize, Opt_wsize, Opt_actimeo,
96 /* Mount options which take string value */
97 Opt_user, Opt_pass, Opt_ip,
98 Opt_domain, Opt_srcaddr, Opt_iocharset,
99 Opt_netbiosname, Opt_servern,
100 Opt_ver, Opt_vers, Opt_sec, Opt_cache,
102 /* Mount options to be ignored */
105 /* Options which could be blank */
113 static const match_table_t cifs_mount_option_tokens = {
115 { Opt_user_xattr, "user_xattr" },
116 { Opt_nouser_xattr, "nouser_xattr" },
117 { Opt_forceuid, "forceuid" },
118 { Opt_noforceuid, "noforceuid" },
119 { Opt_forcegid, "forcegid" },
120 { Opt_noforcegid, "noforcegid" },
121 { Opt_noblocksend, "noblocksend" },
122 { Opt_noautotune, "noautotune" },
123 { Opt_hard, "hard" },
124 { Opt_soft, "soft" },
125 { Opt_perm, "perm" },
126 { Opt_noperm, "noperm" },
127 { Opt_mapchars, "mapchars" },
128 { Opt_nomapchars, "nomapchars" },
130 { Opt_nosfu, "nosfu" },
131 { Opt_nodfs, "nodfs" },
132 { Opt_posixpaths, "posixpaths" },
133 { Opt_noposixpaths, "noposixpaths" },
134 { Opt_nounix, "nounix" },
135 { Opt_nounix, "nolinux" },
136 { Opt_nocase, "nocase" },
137 { Opt_nocase, "ignorecase" },
139 { Opt_nobrl, "nobrl" },
140 { Opt_nobrl, "nolock" },
141 { Opt_forcemandatorylock, "forcemandatorylock" },
142 { Opt_forcemandatorylock, "forcemand" },
143 { Opt_setuids, "setuids" },
144 { Opt_nosetuids, "nosetuids" },
145 { Opt_dynperm, "dynperm" },
146 { Opt_nodynperm, "nodynperm" },
147 { Opt_nohard, "nohard" },
148 { Opt_nosoft, "nosoft" },
149 { Opt_nointr, "nointr" },
150 { Opt_intr, "intr" },
151 { Opt_nostrictsync, "nostrictsync" },
152 { Opt_strictsync, "strictsync" },
153 { Opt_serverino, "serverino" },
154 { Opt_noserverino, "noserverino" },
155 { Opt_rwpidforward, "rwpidforward" },
156 { Opt_cifsacl, "cifsacl" },
157 { Opt_nocifsacl, "nocifsacl" },
159 { Opt_noacl, "noacl" },
160 { Opt_locallease, "locallease" },
161 { Opt_sign, "sign" },
162 { Opt_seal, "seal" },
163 { Opt_noac, "noac" },
165 { Opt_mfsymlinks, "mfsymlinks" },
166 { Opt_multiuser, "multiuser" },
167 { Opt_sloppy, "sloppy" },
168 { Opt_nosharesock, "nosharesock" },
170 { Opt_backupuid, "backupuid=%s" },
171 { Opt_backupgid, "backupgid=%s" },
172 { Opt_uid, "uid=%s" },
173 { Opt_cruid, "cruid=%s" },
174 { Opt_gid, "gid=%s" },
175 { Opt_file_mode, "file_mode=%s" },
176 { Opt_dirmode, "dirmode=%s" },
177 { Opt_dirmode, "dir_mode=%s" },
178 { Opt_port, "port=%s" },
179 { Opt_rsize, "rsize=%s" },
180 { Opt_wsize, "wsize=%s" },
181 { Opt_actimeo, "actimeo=%s" },
183 { Opt_blank_user, "user=" },
184 { Opt_blank_user, "username=" },
185 { Opt_user, "user=%s" },
186 { Opt_user, "username=%s" },
187 { Opt_blank_pass, "pass=" },
188 { Opt_blank_pass, "password=" },
189 { Opt_pass, "pass=%s" },
190 { Opt_pass, "password=%s" },
191 { Opt_blank_ip, "ip=" },
192 { Opt_blank_ip, "addr=" },
194 { Opt_ip, "addr=%s" },
195 { Opt_ignore, "unc=%s" },
196 { Opt_ignore, "target=%s" },
197 { Opt_ignore, "path=%s" },
198 { Opt_domain, "dom=%s" },
199 { Opt_domain, "domain=%s" },
200 { Opt_domain, "workgroup=%s" },
201 { Opt_srcaddr, "srcaddr=%s" },
202 { Opt_ignore, "prefixpath=%s" },
203 { Opt_iocharset, "iocharset=%s" },
204 { Opt_netbiosname, "netbiosname=%s" },
205 { Opt_servern, "servern=%s" },
206 { Opt_ver, "ver=%s" },
207 { Opt_vers, "vers=%s" },
208 { Opt_sec, "sec=%s" },
209 { Opt_cache, "cache=%s" },
211 { Opt_ignore, "cred" },
212 { Opt_ignore, "credentials" },
213 { Opt_ignore, "cred=%s" },
214 { Opt_ignore, "credentials=%s" },
215 { Opt_ignore, "guest" },
216 { Opt_ignore, "rw" },
217 { Opt_ignore, "ro" },
218 { Opt_ignore, "suid" },
219 { Opt_ignore, "nosuid" },
220 { Opt_ignore, "exec" },
221 { Opt_ignore, "noexec" },
222 { Opt_ignore, "nodev" },
223 { Opt_ignore, "noauto" },
224 { Opt_ignore, "dev" },
225 { Opt_ignore, "mand" },
226 { Opt_ignore, "nomand" },
227 { Opt_ignore, "_netdev" },
233 Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p,
234 Opt_sec_ntlmsspi, Opt_sec_ntlmssp,
235 Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2,
236 Opt_sec_ntlmv2i, Opt_sec_lanman,
242 static const match_table_t cifs_secflavor_tokens = {
243 { Opt_sec_krb5, "krb5" },
244 { Opt_sec_krb5i, "krb5i" },
245 { Opt_sec_krb5p, "krb5p" },
246 { Opt_sec_ntlmsspi, "ntlmsspi" },
247 { Opt_sec_ntlmssp, "ntlmssp" },
248 { Opt_ntlm, "ntlm" },
249 { Opt_sec_ntlmi, "ntlmi" },
250 { Opt_sec_ntlmv2, "nontlm" },
251 { Opt_sec_ntlmv2, "ntlmv2" },
252 { Opt_sec_ntlmv2i, "ntlmv2i" },
253 { Opt_sec_lanman, "lanman" },
254 { Opt_sec_none, "none" },
256 { Opt_sec_err, NULL }
267 static const match_table_t cifs_cacheflavor_tokens = {
268 { Opt_cache_loose, "loose" },
269 { Opt_cache_strict, "strict" },
270 { Opt_cache_none, "none" },
271 { Opt_cache_err, NULL }
274 static const match_table_t cifs_smb_version_tokens = {
275 { Smb_1, SMB1_VERSION_STRING },
276 { Smb_20, SMB20_VERSION_STRING},
277 { Smb_21, SMB21_VERSION_STRING },
278 { Smb_30, SMB30_VERSION_STRING },
279 { Smb_302, SMB302_VERSION_STRING },
282 static int ip_connect(struct TCP_Server_Info *server);
283 static int generic_ip_connect(struct TCP_Server_Info *server);
284 static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink);
285 static void cifs_prune_tlinks(struct work_struct *work);
286 static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
287 const char *devname);
290 * cifs tcp session reconnection
292 * mark tcp session as reconnecting so temporarily locked
293 * mark all smb sessions as reconnecting for tcp session
294 * reconnect tcp session
295 * wake up waiters on reconnection? - (not needed currently)
298 cifs_reconnect(struct TCP_Server_Info *server)
301 struct list_head *tmp, *tmp2;
302 struct cifs_ses *ses;
303 struct cifs_tcon *tcon;
304 struct mid_q_entry *mid_entry;
305 struct list_head retry_list;
307 spin_lock(&GlobalMid_Lock);
308 if (server->tcpStatus == CifsExiting) {
309 /* the demux thread will exit normally
310 next time through the loop */
311 spin_unlock(&GlobalMid_Lock);
314 server->tcpStatus = CifsNeedReconnect;
315 spin_unlock(&GlobalMid_Lock);
317 #ifdef CONFIG_CIFS_SMB2
318 server->max_read = 0;
321 cifs_dbg(FYI, "Reconnecting tcp session\n");
323 /* before reconnecting the tcp session, mark the smb session (uid)
324 and the tid bad so they are not used until reconnected */
325 cifs_dbg(FYI, "%s: marking sessions and tcons for reconnect\n",
327 spin_lock(&cifs_tcp_ses_lock);
328 list_for_each(tmp, &server->smb_ses_list) {
329 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
330 ses->need_reconnect = true;
332 list_for_each(tmp2, &ses->tcon_list) {
333 tcon = list_entry(tmp2, struct cifs_tcon, tcon_list);
334 tcon->need_reconnect = true;
337 spin_unlock(&cifs_tcp_ses_lock);
339 /* do not want to be sending data on a socket we are freeing */
340 cifs_dbg(FYI, "%s: tearing down socket\n", __func__);
341 mutex_lock(&server->srv_mutex);
342 if (server->ssocket) {
343 cifs_dbg(FYI, "State: 0x%x Flags: 0x%lx\n",
344 server->ssocket->state, server->ssocket->flags);
345 kernel_sock_shutdown(server->ssocket, SHUT_WR);
346 cifs_dbg(FYI, "Post shutdown state: 0x%x Flags: 0x%lx\n",
347 server->ssocket->state, server->ssocket->flags);
348 sock_release(server->ssocket);
349 server->ssocket = NULL;
351 server->sequence_number = 0;
352 server->session_estab = false;
353 kfree(server->session_key.response);
354 server->session_key.response = NULL;
355 server->session_key.len = 0;
356 server->lstrp = jiffies;
357 mutex_unlock(&server->srv_mutex);
359 /* mark submitted MIDs for retry and issue callback */
360 INIT_LIST_HEAD(&retry_list);
361 cifs_dbg(FYI, "%s: moving mids to private list\n", __func__);
362 spin_lock(&GlobalMid_Lock);
363 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
364 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
365 if (mid_entry->mid_state == MID_REQUEST_SUBMITTED)
366 mid_entry->mid_state = MID_RETRY_NEEDED;
367 list_move(&mid_entry->qhead, &retry_list);
369 spin_unlock(&GlobalMid_Lock);
371 cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__);
372 list_for_each_safe(tmp, tmp2, &retry_list) {
373 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
374 list_del_init(&mid_entry->qhead);
375 mid_entry->callback(mid_entry);
381 /* we should try only the port we connected to before */
382 mutex_lock(&server->srv_mutex);
383 rc = generic_ip_connect(server);
385 cifs_dbg(FYI, "reconnect error %d\n", rc);
388 atomic_inc(&tcpSesReconnectCount);
389 spin_lock(&GlobalMid_Lock);
390 if (server->tcpStatus != CifsExiting)
391 server->tcpStatus = CifsNeedNegotiate;
392 spin_unlock(&GlobalMid_Lock);
394 mutex_unlock(&server->srv_mutex);
395 } while (server->tcpStatus == CifsNeedReconnect);
401 cifs_echo_request(struct work_struct *work)
404 struct TCP_Server_Info *server = container_of(work,
405 struct TCP_Server_Info, echo.work);
408 * We cannot send an echo if it is disabled or until the
409 * NEGOTIATE_PROTOCOL request is done, which is indicated by
410 * server->ops->need_neg() == true. Also, no need to ping if
411 * we got a response recently.
413 if (!server->ops->need_neg || server->ops->need_neg(server) ||
414 (server->ops->can_echo && !server->ops->can_echo(server)) ||
415 time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ))
418 rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS;
420 cifs_dbg(FYI, "Unable to send echo request to server: %s\n",
424 queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL);
428 allocate_buffers(struct TCP_Server_Info *server)
430 if (!server->bigbuf) {
431 server->bigbuf = (char *)cifs_buf_get();
432 if (!server->bigbuf) {
433 cifs_dbg(VFS, "No memory for large SMB response\n");
435 /* retry will check if exiting */
438 } else if (server->large_buf) {
439 /* we are reusing a dirty large buf, clear its start */
440 memset(server->bigbuf, 0, HEADER_SIZE(server));
443 if (!server->smallbuf) {
444 server->smallbuf = (char *)cifs_small_buf_get();
445 if (!server->smallbuf) {
446 cifs_dbg(VFS, "No memory for SMB response\n");
448 /* retry will check if exiting */
451 /* beginning of smb buffer is cleared in our buf_get */
453 /* if existing small buf clear beginning */
454 memset(server->smallbuf, 0, HEADER_SIZE(server));
461 server_unresponsive(struct TCP_Server_Info *server)
464 * We need to wait 2 echo intervals to make sure we handle such
466 * 1s client sends a normal SMB request
467 * 2s client gets a response
468 * 30s echo workqueue job pops, and decides we got a response recently
469 * and don't need to send another
471 * 65s kernel_recvmsg times out, and we see that we haven't gotten
472 * a response in >60s.
474 if (server->tcpStatus == CifsGood &&
475 time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) {
476 cifs_dbg(VFS, "Server %s has not responded in %d seconds. Reconnecting...\n",
477 server->hostname, (2 * SMB_ECHO_INTERVAL) / HZ);
478 cifs_reconnect(server);
479 wake_up(&server->response_q);
487 * kvec_array_init - clone a kvec array, and advance into it
488 * @new: pointer to memory for cloned array
489 * @iov: pointer to original array
490 * @nr_segs: number of members in original array
491 * @bytes: number of bytes to advance into the cloned array
493 * This function will copy the array provided in iov to a section of memory
494 * and advance the specified number of bytes into the new array. It returns
495 * the number of segments in the new array. "new" must be at least as big as
496 * the original iov array.
499 kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs,
504 while (bytes || !iov->iov_len) {
505 int copy = min(bytes, iov->iov_len);
509 if (iov->iov_len == base) {
515 memcpy(new, iov, sizeof(*iov) * nr_segs);
516 new->iov_base += base;
517 new->iov_len -= base;
522 get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs)
524 struct kvec *new_iov;
526 if (server->iov && nr_segs <= server->nr_iov)
529 /* not big enough -- allocate a new one and release the old */
530 new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS);
533 server->iov = new_iov;
534 server->nr_iov = nr_segs;
540 cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig,
541 unsigned int nr_segs, unsigned int to_read)
546 struct msghdr smb_msg;
549 iov = get_server_iovec(server, nr_segs);
553 smb_msg.msg_control = NULL;
554 smb_msg.msg_controllen = 0;
556 for (total_read = 0; to_read; total_read += length, to_read -= length) {
559 if (server_unresponsive(server)) {
560 total_read = -EAGAIN;
564 segs = kvec_array_init(iov, iov_orig, nr_segs, total_read);
566 length = kernel_recvmsg(server->ssocket, &smb_msg,
567 iov, segs, to_read, 0);
569 if (server->tcpStatus == CifsExiting) {
570 total_read = -ESHUTDOWN;
572 } else if (server->tcpStatus == CifsNeedReconnect) {
573 cifs_reconnect(server);
574 total_read = -EAGAIN;
576 } else if (length == -ERESTARTSYS ||
580 * Minimum sleep to prevent looping, allowing socket
581 * to clear and app threads to set tcpStatus
582 * CifsNeedReconnect if server hung.
584 usleep_range(1000, 2000);
587 } else if (length <= 0) {
588 cifs_dbg(FYI, "Received no data or error: expecting %d\n"
589 "got %d", to_read, length);
590 cifs_reconnect(server);
591 total_read = -EAGAIN;
599 cifs_read_from_socket(struct TCP_Server_Info *server, char *buf,
600 unsigned int to_read)
605 iov.iov_len = to_read;
607 return cifs_readv_from_socket(server, &iov, 1, to_read);
611 is_smb_response(struct TCP_Server_Info *server, unsigned char type)
614 * The first byte big endian of the length field,
615 * is actually not part of the length but the type
616 * with the most common, zero, as regular data.
619 case RFC1002_SESSION_MESSAGE:
620 /* Regular SMB response */
622 case RFC1002_SESSION_KEEP_ALIVE:
623 cifs_dbg(FYI, "RFC 1002 session keep alive\n");
625 case RFC1002_POSITIVE_SESSION_RESPONSE:
626 cifs_dbg(FYI, "RFC 1002 positive session response\n");
628 case RFC1002_NEGATIVE_SESSION_RESPONSE:
630 * We get this from Windows 98 instead of an error on
631 * SMB negprot response.
633 cifs_dbg(FYI, "RFC 1002 negative session response\n");
634 /* give server a second to clean up */
637 * Always try 445 first on reconnect since we get NACK
638 * on some if we ever connected to port 139 (the NACK
639 * is since we do not begin with RFC1001 session
642 cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT);
643 cifs_reconnect(server);
644 wake_up(&server->response_q);
647 cifs_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type);
648 cifs_reconnect(server);
655 dequeue_mid(struct mid_q_entry *mid, bool malformed)
657 #ifdef CONFIG_CIFS_STATS2
658 mid->when_received = jiffies;
660 spin_lock(&GlobalMid_Lock);
662 mid->mid_state = MID_RESPONSE_RECEIVED;
664 mid->mid_state = MID_RESPONSE_MALFORMED;
665 list_del_init(&mid->qhead);
666 spin_unlock(&GlobalMid_Lock);
670 handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server,
671 char *buf, int malformed)
673 if (server->ops->check_trans2 &&
674 server->ops->check_trans2(mid, server, buf, malformed))
677 mid->large_buf = server->large_buf;
678 /* Was previous buf put in mpx struct for multi-rsp? */
679 if (!mid->multiRsp) {
680 /* smb buffer will be freed by user thread */
681 if (server->large_buf)
682 server->bigbuf = NULL;
684 server->smallbuf = NULL;
686 dequeue_mid(mid, malformed);
689 static void clean_demultiplex_info(struct TCP_Server_Info *server)
693 /* take it off the list, if it's not already */
694 spin_lock(&cifs_tcp_ses_lock);
695 list_del_init(&server->tcp_ses_list);
696 spin_unlock(&cifs_tcp_ses_lock);
698 spin_lock(&GlobalMid_Lock);
699 server->tcpStatus = CifsExiting;
700 spin_unlock(&GlobalMid_Lock);
701 wake_up_all(&server->response_q);
703 /* check if we have blocked requests that need to free */
704 spin_lock(&server->req_lock);
705 if (server->credits <= 0)
707 spin_unlock(&server->req_lock);
709 * Although there should not be any requests blocked on this queue it
710 * can not hurt to be paranoid and try to wake up requests that may
711 * haven been blocked when more than 50 at time were on the wire to the
712 * same server - they now will see the session is in exit state and get
713 * out of SendReceive.
715 wake_up_all(&server->request_q);
716 /* give those requests time to exit */
719 if (server->ssocket) {
720 sock_release(server->ssocket);
721 server->ssocket = NULL;
724 if (!list_empty(&server->pending_mid_q)) {
725 struct list_head dispose_list;
726 struct mid_q_entry *mid_entry;
727 struct list_head *tmp, *tmp2;
729 INIT_LIST_HEAD(&dispose_list);
730 spin_lock(&GlobalMid_Lock);
731 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
732 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
733 cifs_dbg(FYI, "Clearing mid 0x%llx\n", mid_entry->mid);
734 mid_entry->mid_state = MID_SHUTDOWN;
735 list_move(&mid_entry->qhead, &dispose_list);
737 spin_unlock(&GlobalMid_Lock);
739 /* now walk dispose list and issue callbacks */
740 list_for_each_safe(tmp, tmp2, &dispose_list) {
741 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
742 cifs_dbg(FYI, "Callback mid 0x%llx\n", mid_entry->mid);
743 list_del_init(&mid_entry->qhead);
744 mid_entry->callback(mid_entry);
746 /* 1/8th of sec is more than enough time for them to exit */
750 if (!list_empty(&server->pending_mid_q)) {
752 * mpx threads have not exited yet give them at least the smb
753 * send timeout time for long ops.
755 * Due to delays on oplock break requests, we need to wait at
756 * least 45 seconds before giving up on a request getting a
757 * response and going ahead and killing cifsd.
759 cifs_dbg(FYI, "Wait for exit from demultiplex thread\n");
762 * If threads still have not exited they are probably never
763 * coming home not much else we can do but free the memory.
767 kfree(server->hostname);
771 length = atomic_dec_return(&tcpSesAllocCount);
773 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
778 standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid)
781 char *buf = server->smallbuf;
782 unsigned int pdu_length = get_rfc1002_length(buf);
784 /* make sure this will fit in a large buffer */
785 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) {
786 cifs_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length);
787 cifs_reconnect(server);
788 wake_up(&server->response_q);
792 /* switch to large buffer if too big for a small one */
793 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
794 server->large_buf = true;
795 memcpy(server->bigbuf, buf, server->total_read);
796 buf = server->bigbuf;
799 /* now read the rest */
800 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
801 pdu_length - HEADER_SIZE(server) + 1 + 4);
804 server->total_read += length;
806 dump_smb(buf, server->total_read);
809 * We know that we received enough to get to the MID as we
810 * checked the pdu_length earlier. Now check to see
811 * if the rest of the header is OK. We borrow the length
812 * var for the rest of the loop to avoid a new stack var.
814 * 48 bytes is enough to display the header and a little bit
815 * into the payload for debugging purposes.
817 length = server->ops->check_message(buf, server->total_read);
819 cifs_dump_mem("Bad SMB: ", buf,
820 min_t(unsigned int, server->total_read, 48));
822 if (server->ops->is_status_pending &&
823 server->ops->is_status_pending(buf, server, length))
829 handle_mid(mid, server, buf, length);
834 cifs_demultiplex_thread(void *p)
837 struct TCP_Server_Info *server = p;
838 unsigned int pdu_length;
840 struct task_struct *task_to_wake = NULL;
841 struct mid_q_entry *mid_entry;
843 current->flags |= PF_MEMALLOC;
844 cifs_dbg(FYI, "Demultiplex PID: %d\n", task_pid_nr(current));
846 length = atomic_inc_return(&tcpSesAllocCount);
848 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
852 while (server->tcpStatus != CifsExiting) {
856 if (!allocate_buffers(server))
859 server->large_buf = false;
860 buf = server->smallbuf;
861 pdu_length = 4; /* enough to get RFC1001 header */
863 length = cifs_read_from_socket(server, buf, pdu_length);
866 server->total_read = length;
869 * The right amount was read from socket - 4 bytes,
870 * so we can now interpret the length field.
872 pdu_length = get_rfc1002_length(buf);
874 cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length);
875 if (!is_smb_response(server, buf[0]))
878 /* make sure we have enough to get to the MID */
879 if (pdu_length < HEADER_SIZE(server) - 1 - 4) {
880 cifs_dbg(VFS, "SMB response too short (%u bytes)\n",
882 cifs_reconnect(server);
883 wake_up(&server->response_q);
887 /* read down to the MID */
888 length = cifs_read_from_socket(server, buf + 4,
889 HEADER_SIZE(server) - 1 - 4);
892 server->total_read += length;
894 mid_entry = server->ops->find_mid(server, buf);
896 if (!mid_entry || !mid_entry->receive)
897 length = standard_receive3(server, mid_entry);
899 length = mid_entry->receive(server, mid_entry);
904 if (server->large_buf)
905 buf = server->bigbuf;
907 server->lstrp = jiffies;
908 if (mid_entry != NULL) {
909 if (!mid_entry->multiRsp || mid_entry->multiEnd)
910 mid_entry->callback(mid_entry);
911 } else if (!server->ops->is_oplock_break ||
912 !server->ops->is_oplock_break(buf, server)) {
913 cifs_dbg(VFS, "No task to wake, unknown frame received! NumMids %d\n",
914 atomic_read(&midCount));
915 cifs_dump_mem("Received Data is: ", buf,
916 HEADER_SIZE(server));
917 #ifdef CONFIG_CIFS_DEBUG2
918 if (server->ops->dump_detail)
919 server->ops->dump_detail(buf);
920 cifs_dump_mids(server);
921 #endif /* CIFS_DEBUG2 */
924 } /* end while !EXITING */
926 /* buffer usually freed in free_mid - need to free it here on exit */
927 cifs_buf_release(server->bigbuf);
928 if (server->smallbuf) /* no sense logging a debug message if NULL */
929 cifs_small_buf_release(server->smallbuf);
931 task_to_wake = xchg(&server->tsk, NULL);
932 clean_demultiplex_info(server);
934 /* if server->tsk was NULL then wait for a signal before exiting */
936 set_current_state(TASK_INTERRUPTIBLE);
937 while (!signal_pending(current)) {
939 set_current_state(TASK_INTERRUPTIBLE);
941 set_current_state(TASK_RUNNING);
944 module_put_and_exit(0);
947 /* extract the host portion of the UNC string */
949 extract_hostname(const char *unc)
955 /* skip double chars at beginning of string */
956 /* BB: check validity of these bytes? */
959 /* delimiter between hostname and sharename is always '\\' now */
960 delim = strchr(src, '\\');
962 return ERR_PTR(-EINVAL);
965 dst = kmalloc((len + 1), GFP_KERNEL);
967 return ERR_PTR(-ENOMEM);
969 memcpy(dst, src, len);
975 static int get_option_ul(substring_t args[], unsigned long *option)
980 string = match_strdup(args);
983 rc = kstrtoul(string, 0, option);
989 static int get_option_uid(substring_t args[], kuid_t *result)
995 rc = get_option_ul(args, &value);
999 uid = make_kuid(current_user_ns(), value);
1000 if (!uid_valid(uid))
1007 static int get_option_gid(substring_t args[], kgid_t *result)
1009 unsigned long value;
1013 rc = get_option_ul(args, &value);
1017 gid = make_kgid(current_user_ns(), value);
1018 if (!gid_valid(gid))
1025 static int cifs_parse_security_flavors(char *value,
1026 struct smb_vol *vol)
1029 substring_t args[MAX_OPT_ARGS];
1032 * With mount options, the last one should win. Reset any existing
1033 * settings back to default.
1035 vol->sectype = Unspecified;
1038 switch (match_token(value, cifs_secflavor_tokens, args)) {
1040 cifs_dbg(VFS, "sec=krb5p is not supported!\n");
1046 vol->sectype = Kerberos;
1048 case Opt_sec_ntlmsspi:
1051 case Opt_sec_ntlmssp:
1052 vol->sectype = RawNTLMSSP;
1058 vol->sectype = NTLM;
1060 case Opt_sec_ntlmv2i:
1063 case Opt_sec_ntlmv2:
1064 vol->sectype = NTLMv2;
1066 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1067 case Opt_sec_lanman:
1068 vol->sectype = LANMAN;
1075 cifs_dbg(VFS, "bad security option: %s\n", value);
1083 cifs_parse_cache_flavor(char *value, struct smb_vol *vol)
1085 substring_t args[MAX_OPT_ARGS];
1087 switch (match_token(value, cifs_cacheflavor_tokens, args)) {
1088 case Opt_cache_loose:
1089 vol->direct_io = false;
1090 vol->strict_io = false;
1092 case Opt_cache_strict:
1093 vol->direct_io = false;
1094 vol->strict_io = true;
1096 case Opt_cache_none:
1097 vol->direct_io = true;
1098 vol->strict_io = false;
1101 cifs_dbg(VFS, "bad cache= option: %s\n", value);
1108 cifs_parse_smb_version(char *value, struct smb_vol *vol)
1110 substring_t args[MAX_OPT_ARGS];
1112 switch (match_token(value, cifs_smb_version_tokens, args)) {
1114 vol->ops = &smb1_operations;
1115 vol->vals = &smb1_values;
1117 #ifdef CONFIG_CIFS_SMB2
1119 vol->ops = &smb20_operations;
1120 vol->vals = &smb20_values;
1123 vol->ops = &smb21_operations;
1124 vol->vals = &smb21_values;
1127 vol->ops = &smb30_operations;
1128 vol->vals = &smb30_values;
1131 vol->ops = &smb30_operations; /* currently identical with 3.0 */
1132 vol->vals = &smb302_values;
1136 cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value);
1143 * Parse a devname into substrings and populate the vol->UNC and vol->prepath
1144 * fields with the result. Returns 0 on success and an error otherwise.
1147 cifs_parse_devname(const char *devname, struct smb_vol *vol)
1150 const char *delims = "/\\";
1153 /* make sure we have a valid UNC double delimiter prefix */
1154 len = strspn(devname, delims);
1158 /* find delimiter between host and sharename */
1159 pos = strpbrk(devname + 2, delims);
1163 /* skip past delimiter */
1166 /* now go until next delimiter or end of string */
1167 len = strcspn(pos, delims);
1169 /* move "pos" up to delimiter or NULL */
1171 vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL);
1175 convert_delimiter(vol->UNC, '\\');
1177 /* If pos is NULL, or is a bogus trailing delimiter then no prepath */
1178 if (!*pos++ || !*pos)
1181 vol->prepath = kstrdup(pos, GFP_KERNEL);
1189 cifs_parse_mount_options(const char *mountdata, const char *devname,
1190 struct smb_vol *vol)
1193 char *mountdata_copy = NULL, *options;
1194 unsigned int temp_len, i, j;
1196 short int override_uid = -1;
1197 short int override_gid = -1;
1198 bool uid_specified = false;
1199 bool gid_specified = false;
1200 bool sloppy = false;
1201 char *invalid = NULL;
1202 char *nodename = utsname()->nodename;
1203 char *string = NULL;
1204 char *tmp_end, *value;
1206 bool got_ip = false;
1207 unsigned short port = 0;
1208 struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr;
1212 delim = separator[0];
1214 /* ensure we always start with zeroed-out smb_vol */
1215 memset(vol, 0, sizeof(*vol));
1218 * does not have to be perfect mapping since field is
1219 * informational, only used for servers that do not support
1220 * port 445 and it can be overridden at mount time
1222 memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
1223 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
1224 vol->source_rfc1001_name[i] = toupper(nodename[i]);
1226 vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
1227 /* null target name indicates to use *SMBSERVR default called name
1228 if we end up sending RFC1001 session initialize */
1229 vol->target_rfc1001_name[0] = 0;
1230 vol->cred_uid = current_uid();
1231 vol->linux_uid = current_uid();
1232 vol->linux_gid = current_gid();
1234 /* default to only allowing write access to owner of the mount */
1235 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
1237 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
1238 /* default is always to request posix paths. */
1239 vol->posix_paths = 1;
1240 /* default to using server inode numbers where available */
1241 vol->server_ino = 1;
1243 /* default is to use strict cifs caching semantics */
1244 vol->strict_io = true;
1246 vol->actimeo = CIFS_DEF_ACTIMEO;
1248 /* FIXME: add autonegotiation -- for now, SMB1 is default */
1249 vol->ops = &smb1_operations;
1250 vol->vals = &smb1_values;
1253 goto cifs_parse_mount_err;
1255 mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL);
1256 if (!mountdata_copy)
1257 goto cifs_parse_mount_err;
1259 options = mountdata_copy;
1260 end = options + strlen(options);
1262 if (strncmp(options, "sep=", 4) == 0) {
1263 if (options[4] != 0) {
1264 separator[0] = options[4];
1267 cifs_dbg(FYI, "Null separator not allowed\n");
1270 vol->backupuid_specified = false; /* no backup intent for a user */
1271 vol->backupgid_specified = false; /* no backup intent for a group */
1273 switch (cifs_parse_devname(devname, vol)) {
1277 cifs_dbg(VFS, "Unable to allocate memory for devname.\n");
1278 goto cifs_parse_mount_err;
1280 cifs_dbg(VFS, "Malformed UNC in devname.\n");
1281 goto cifs_parse_mount_err;
1283 cifs_dbg(VFS, "Unknown error parsing devname.\n");
1284 goto cifs_parse_mount_err;
1287 while ((data = strsep(&options, separator)) != NULL) {
1288 substring_t args[MAX_OPT_ARGS];
1289 unsigned long option;
1295 token = match_token(data, cifs_mount_option_tokens, args);
1299 /* Ingnore the following */
1303 /* Boolean values */
1304 case Opt_user_xattr:
1307 case Opt_nouser_xattr:
1313 case Opt_noforceuid:
1319 case Opt_noforcegid:
1322 case Opt_noblocksend:
1323 vol->noblocksnd = 1;
1325 case Opt_noautotune:
1326 vol->noautotune = 1;
1343 case Opt_nomapchars:
1355 case Opt_posixpaths:
1356 vol->posix_paths = 1;
1358 case Opt_noposixpaths:
1359 vol->posix_paths = 0;
1362 vol->no_linux_ext = 1;
1373 * turn off mandatory locking in mode
1374 * if remote locking is turned off since the
1375 * local vfs will do advisory
1377 if (vol->file_mode ==
1378 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1379 vol->file_mode = S_IALLUGO;
1381 case Opt_forcemandatorylock:
1391 vol->dynperm = true;
1394 vol->dynperm = false;
1408 case Opt_nostrictsync:
1409 vol->nostrictsync = 1;
1411 case Opt_strictsync:
1412 vol->nostrictsync = 0;
1415 vol->server_ino = 1;
1417 case Opt_noserverino:
1418 vol->server_ino = 0;
1420 case Opt_rwpidforward:
1421 vol->rwpidforward = 1;
1430 vol->no_psx_acl = 0;
1433 vol->no_psx_acl = 1;
1435 case Opt_locallease:
1436 vol->local_lease = 1;
1442 /* we do not do the following in secFlags because seal
1443 * is a per tree connection (mount) not a per socket
1444 * or per-smb connection option in the protocol
1445 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1450 printk(KERN_WARNING "CIFS: Mount option noac not "
1451 "supported. Instead set "
1452 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1455 #ifndef CONFIG_CIFS_FSCACHE
1456 cifs_dbg(VFS, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n");
1457 goto cifs_parse_mount_err;
1461 case Opt_mfsymlinks:
1462 vol->mfsymlinks = true;
1465 vol->multiuser = true;
1470 case Opt_nosharesock:
1471 vol->nosharesock = true;
1474 /* Numeric Values */
1476 if (get_option_uid(args, &vol->backupuid)) {
1477 cifs_dbg(VFS, "%s: Invalid backupuid value\n",
1479 goto cifs_parse_mount_err;
1481 vol->backupuid_specified = true;
1484 if (get_option_gid(args, &vol->backupgid)) {
1485 cifs_dbg(VFS, "%s: Invalid backupgid value\n",
1487 goto cifs_parse_mount_err;
1489 vol->backupgid_specified = true;
1492 if (get_option_uid(args, &vol->linux_uid)) {
1493 cifs_dbg(VFS, "%s: Invalid uid value\n",
1495 goto cifs_parse_mount_err;
1497 uid_specified = true;
1500 if (get_option_uid(args, &vol->cred_uid)) {
1501 cifs_dbg(VFS, "%s: Invalid cruid value\n",
1503 goto cifs_parse_mount_err;
1507 if (get_option_gid(args, &vol->linux_gid)) {
1508 cifs_dbg(VFS, "%s: Invalid gid value\n",
1510 goto cifs_parse_mount_err;
1512 gid_specified = true;
1515 if (get_option_ul(args, &option)) {
1516 cifs_dbg(VFS, "%s: Invalid file_mode value\n",
1518 goto cifs_parse_mount_err;
1520 vol->file_mode = option;
1523 if (get_option_ul(args, &option)) {
1524 cifs_dbg(VFS, "%s: Invalid dir_mode value\n",
1526 goto cifs_parse_mount_err;
1528 vol->dir_mode = option;
1531 if (get_option_ul(args, &option) ||
1532 option > USHRT_MAX) {
1533 cifs_dbg(VFS, "%s: Invalid port value\n",
1535 goto cifs_parse_mount_err;
1537 port = (unsigned short)option;
1540 if (get_option_ul(args, &option)) {
1541 cifs_dbg(VFS, "%s: Invalid rsize value\n",
1543 goto cifs_parse_mount_err;
1545 vol->rsize = option;
1548 if (get_option_ul(args, &option)) {
1549 cifs_dbg(VFS, "%s: Invalid wsize value\n",
1551 goto cifs_parse_mount_err;
1553 vol->wsize = option;
1556 if (get_option_ul(args, &option)) {
1557 cifs_dbg(VFS, "%s: Invalid actimeo value\n",
1559 goto cifs_parse_mount_err;
1561 vol->actimeo = HZ * option;
1562 if (vol->actimeo > CIFS_MAX_ACTIMEO) {
1563 cifs_dbg(VFS, "attribute cache timeout too large\n");
1564 goto cifs_parse_mount_err;
1568 /* String Arguments */
1570 case Opt_blank_user:
1571 /* null user, ie. anonymous authentication */
1573 vol->username = NULL;
1576 string = match_strdup(args);
1580 if (strnlen(string, CIFS_MAX_USERNAME_LEN) >
1581 CIFS_MAX_USERNAME_LEN) {
1582 printk(KERN_WARNING "CIFS: username too long\n");
1583 goto cifs_parse_mount_err;
1585 vol->username = kstrdup(string, GFP_KERNEL);
1587 goto cifs_parse_mount_err;
1589 case Opt_blank_pass:
1590 /* passwords have to be handled differently
1591 * to allow the character used for deliminator
1592 * to be passed within them
1596 * Check if this is a case where the password
1597 * starts with a delimiter
1599 tmp_end = strchr(data, '=');
1601 if (!(tmp_end < end && tmp_end[1] == delim)) {
1602 /* No it is not. Set the password to NULL */
1603 vol->password = NULL;
1606 /* Yes it is. Drop down to Opt_pass below.*/
1608 /* Obtain the value string */
1609 value = strchr(data, '=');
1612 /* Set tmp_end to end of the string */
1613 tmp_end = (char *) value + strlen(value);
1615 /* Check if following character is the deliminator
1616 * If yes, we have encountered a double deliminator
1617 * reset the NULL character to the deliminator
1619 if (tmp_end < end && tmp_end[1] == delim) {
1622 /* Keep iterating until we get to a single
1623 * deliminator OR the end
1625 while ((tmp_end = strchr(tmp_end, delim))
1626 != NULL && (tmp_end[1] == delim)) {
1627 tmp_end = (char *) &tmp_end[2];
1630 /* Reset var options to point to next element */
1633 options = (char *) &tmp_end[1];
1635 /* Reached the end of the mount option
1640 /* Now build new password string */
1641 temp_len = strlen(value);
1642 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
1643 if (vol->password == NULL) {
1644 printk(KERN_WARNING "CIFS: no memory "
1646 goto cifs_parse_mount_err;
1649 for (i = 0, j = 0; i < temp_len; i++, j++) {
1650 vol->password[j] = value[i];
1651 if ((value[i] == delim) &&
1652 value[i+1] == delim)
1653 /* skip the second deliminator */
1656 vol->password[j] = '\0';
1659 /* FIXME: should this be an error instead? */
1663 string = match_strdup(args);
1667 if (!cifs_convert_address(dstaddr, string,
1669 printk(KERN_ERR "CIFS: bad ip= option (%s).\n",
1671 goto cifs_parse_mount_err;
1676 string = match_strdup(args);
1680 if (strnlen(string, CIFS_MAX_DOMAINNAME_LEN)
1681 == CIFS_MAX_DOMAINNAME_LEN) {
1682 printk(KERN_WARNING "CIFS: domain name too"
1684 goto cifs_parse_mount_err;
1687 vol->domainname = kstrdup(string, GFP_KERNEL);
1688 if (!vol->domainname) {
1689 printk(KERN_WARNING "CIFS: no memory "
1690 "for domainname\n");
1691 goto cifs_parse_mount_err;
1693 cifs_dbg(FYI, "Domain name set\n");
1696 string = match_strdup(args);
1700 if (!cifs_convert_address(
1701 (struct sockaddr *)&vol->srcaddr,
1702 string, strlen(string))) {
1703 printk(KERN_WARNING "CIFS: Could not parse"
1704 " srcaddr: %s\n", string);
1705 goto cifs_parse_mount_err;
1709 string = match_strdup(args);
1713 if (strnlen(string, 1024) >= 65) {
1714 printk(KERN_WARNING "CIFS: iocharset name "
1716 goto cifs_parse_mount_err;
1719 if (strnicmp(string, "default", 7) != 0) {
1720 vol->iocharset = kstrdup(string,
1722 if (!vol->iocharset) {
1723 printk(KERN_WARNING "CIFS: no memory"
1725 goto cifs_parse_mount_err;
1728 /* if iocharset not set then load_nls_default
1731 cifs_dbg(FYI, "iocharset set to %s\n", string);
1733 case Opt_netbiosname:
1734 string = match_strdup(args);
1738 memset(vol->source_rfc1001_name, 0x20,
1741 * FIXME: are there cases in which a comma can
1742 * be valid in workstation netbios name (and
1743 * need special handling)?
1745 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1746 /* don't ucase netbiosname for user */
1749 vol->source_rfc1001_name[i] = string[i];
1751 /* The string has 16th byte zero still from
1752 * set at top of the function
1754 if (i == RFC1001_NAME_LEN && string[i] != 0)
1755 printk(KERN_WARNING "CIFS: netbiosname"
1756 " longer than 15 truncated.\n");
1760 /* servernetbiosname specified override *SMBSERVER */
1761 string = match_strdup(args);
1765 /* last byte, type, is 0x20 for servr type */
1766 memset(vol->target_rfc1001_name, 0x20,
1767 RFC1001_NAME_LEN_WITH_NULL);
1769 /* BB are there cases in which a comma can be
1770 valid in this workstation netbios name
1771 (and need special handling)? */
1773 /* user or mount helper must uppercase the
1775 for (i = 0; i < 15; i++) {
1778 vol->target_rfc1001_name[i] = string[i];
1780 /* The string has 16th byte zero still from
1781 set at top of the function */
1782 if (i == RFC1001_NAME_LEN && string[i] != 0)
1783 printk(KERN_WARNING "CIFS: server net"
1784 "biosname longer than 15 truncated.\n");
1787 string = match_strdup(args);
1791 if (strnicmp(string, "1", 1) == 0) {
1792 /* This is the default */
1795 /* For all other value, error */
1796 printk(KERN_WARNING "CIFS: Invalid version"
1798 goto cifs_parse_mount_err;
1800 string = match_strdup(args);
1804 if (cifs_parse_smb_version(string, vol) != 0)
1805 goto cifs_parse_mount_err;
1808 string = match_strdup(args);
1812 if (cifs_parse_security_flavors(string, vol) != 0)
1813 goto cifs_parse_mount_err;
1816 string = match_strdup(args);
1820 if (cifs_parse_cache_flavor(string, vol) != 0)
1821 goto cifs_parse_mount_err;
1825 * An option we don't recognize. Save it off for later
1826 * if we haven't already found one
1832 /* Free up any allocated string */
1837 if (!sloppy && invalid) {
1838 printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid);
1839 goto cifs_parse_mount_err;
1843 /* Muliuser mounts require CONFIG_KEYS support */
1844 if (vol->multiuser) {
1845 cifs_dbg(VFS, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n");
1846 goto cifs_parse_mount_err;
1850 cifs_dbg(VFS, "CIFS mount error: No usable UNC path provided in device string!\n");
1851 goto cifs_parse_mount_err;
1854 /* make sure UNC has a share name */
1855 if (!strchr(vol->UNC + 3, '\\')) {
1856 cifs_dbg(VFS, "Malformed UNC. Unable to find share name.\n");
1857 goto cifs_parse_mount_err;
1861 /* No ip= option specified? Try to get it from UNC */
1862 if (!cifs_convert_address(dstaddr, &vol->UNC[2],
1863 strlen(&vol->UNC[2]))) {
1864 printk(KERN_ERR "Unable to determine destination "
1866 goto cifs_parse_mount_err;
1870 /* set the port that we got earlier */
1871 cifs_set_port(dstaddr, port);
1874 vol->override_uid = override_uid;
1875 else if (override_uid == 1)
1876 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1877 "specified with no uid= option.\n");
1880 vol->override_gid = override_gid;
1881 else if (override_gid == 1)
1882 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1883 "specified with no gid= option.\n");
1885 kfree(mountdata_copy);
1889 printk(KERN_WARNING "Could not allocate temporary buffer\n");
1890 cifs_parse_mount_err:
1892 kfree(mountdata_copy);
1896 /** Returns true if srcaddr isn't specified and rhs isn't
1897 * specified, or if srcaddr is specified and
1898 * matches the IP address of the rhs argument.
1901 srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs)
1903 switch (srcaddr->sa_family) {
1905 return (rhs->sa_family == AF_UNSPEC);
1907 struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr;
1908 struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs;
1909 return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr);
1912 struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr;
1913 struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs;
1914 return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr);
1918 return false; /* don't expect to be here */
1923 * If no port is specified in addr structure, we try to match with 445 port
1924 * and if it fails - with 139 ports. It should be called only if address
1925 * families of server and addr are equal.
1928 match_port(struct TCP_Server_Info *server, struct sockaddr *addr)
1930 __be16 port, *sport;
1932 switch (addr->sa_family) {
1934 sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port;
1935 port = ((struct sockaddr_in *) addr)->sin_port;
1938 sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port;
1939 port = ((struct sockaddr_in6 *) addr)->sin6_port;
1947 port = htons(CIFS_PORT);
1951 port = htons(RFC1001_PORT);
1954 return port == *sport;
1958 match_address(struct TCP_Server_Info *server, struct sockaddr *addr,
1959 struct sockaddr *srcaddr)
1961 switch (addr->sa_family) {
1963 struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
1964 struct sockaddr_in *srv_addr4 =
1965 (struct sockaddr_in *)&server->dstaddr;
1967 if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr)
1972 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
1973 struct sockaddr_in6 *srv_addr6 =
1974 (struct sockaddr_in6 *)&server->dstaddr;
1976 if (!ipv6_addr_equal(&addr6->sin6_addr,
1977 &srv_addr6->sin6_addr))
1979 if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id)
1985 return false; /* don't expect to be here */
1988 if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr))
1995 match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
1998 * The select_sectype function should either return the vol->sectype
1999 * that was specified, or "Unspecified" if that sectype was not
2000 * compatible with the given NEGOTIATE request.
2002 if (select_sectype(server, vol->sectype) == Unspecified)
2006 * Now check if signing mode is acceptable. No need to check
2007 * global_secflags at this point since if MUST_SIGN is set then
2008 * the server->sign had better be too.
2010 if (vol->sign && !server->sign)
2016 static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol)
2018 struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr;
2020 if (vol->nosharesock)
2023 if ((server->vals != vol->vals) || (server->ops != vol->ops))
2026 if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns))
2029 if (!match_address(server, addr,
2030 (struct sockaddr *)&vol->srcaddr))
2033 if (!match_port(server, addr))
2036 if (!match_security(server, vol))
2042 static struct TCP_Server_Info *
2043 cifs_find_tcp_session(struct smb_vol *vol)
2045 struct TCP_Server_Info *server;
2047 spin_lock(&cifs_tcp_ses_lock);
2048 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
2049 if (!match_server(server, vol))
2052 ++server->srv_count;
2053 spin_unlock(&cifs_tcp_ses_lock);
2054 cifs_dbg(FYI, "Existing tcp session with server found\n");
2057 spin_unlock(&cifs_tcp_ses_lock);
2062 cifs_put_tcp_session(struct TCP_Server_Info *server)
2064 struct task_struct *task;
2066 spin_lock(&cifs_tcp_ses_lock);
2067 if (--server->srv_count > 0) {
2068 spin_unlock(&cifs_tcp_ses_lock);
2072 put_net(cifs_net_ns(server));
2074 list_del_init(&server->tcp_ses_list);
2075 spin_unlock(&cifs_tcp_ses_lock);
2077 cancel_delayed_work_sync(&server->echo);
2079 spin_lock(&GlobalMid_Lock);
2080 server->tcpStatus = CifsExiting;
2081 spin_unlock(&GlobalMid_Lock);
2083 cifs_crypto_shash_release(server);
2084 cifs_fscache_release_client_cookie(server);
2086 kfree(server->session_key.response);
2087 server->session_key.response = NULL;
2088 server->session_key.len = 0;
2090 task = xchg(&server->tsk, NULL);
2092 force_sig(SIGKILL, task);
2095 static struct TCP_Server_Info *
2096 cifs_get_tcp_session(struct smb_vol *volume_info)
2098 struct TCP_Server_Info *tcp_ses = NULL;
2101 cifs_dbg(FYI, "UNC: %s\n", volume_info->UNC);
2103 /* see if we already have a matching tcp_ses */
2104 tcp_ses = cifs_find_tcp_session(volume_info);
2108 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
2114 tcp_ses->ops = volume_info->ops;
2115 tcp_ses->vals = volume_info->vals;
2116 cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns));
2117 tcp_ses->hostname = extract_hostname(volume_info->UNC);
2118 if (IS_ERR(tcp_ses->hostname)) {
2119 rc = PTR_ERR(tcp_ses->hostname);
2120 goto out_err_crypto_release;
2123 tcp_ses->noblocksnd = volume_info->noblocksnd;
2124 tcp_ses->noautotune = volume_info->noautotune;
2125 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
2126 tcp_ses->in_flight = 0;
2127 tcp_ses->credits = 1;
2128 init_waitqueue_head(&tcp_ses->response_q);
2129 init_waitqueue_head(&tcp_ses->request_q);
2130 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
2131 mutex_init(&tcp_ses->srv_mutex);
2132 memcpy(tcp_ses->workstation_RFC1001_name,
2133 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
2134 memcpy(tcp_ses->server_RFC1001_name,
2135 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
2136 tcp_ses->session_estab = false;
2137 tcp_ses->sequence_number = 0;
2138 tcp_ses->lstrp = jiffies;
2139 spin_lock_init(&tcp_ses->req_lock);
2140 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
2141 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
2142 INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
2143 memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
2144 sizeof(tcp_ses->srcaddr));
2145 memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr,
2146 sizeof(tcp_ses->dstaddr));
2148 * at this point we are the only ones with the pointer
2149 * to the struct since the kernel thread not created yet
2150 * no need to spinlock this init of tcpStatus or srv_count
2152 tcp_ses->tcpStatus = CifsNew;
2153 ++tcp_ses->srv_count;
2155 rc = ip_connect(tcp_ses);
2157 cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n");
2158 goto out_err_crypto_release;
2162 * since we're in a cifs function already, we know that
2163 * this will succeed. No need for try_module_get().
2165 __module_get(THIS_MODULE);
2166 tcp_ses->tsk = kthread_run(cifs_demultiplex_thread,
2168 if (IS_ERR(tcp_ses->tsk)) {
2169 rc = PTR_ERR(tcp_ses->tsk);
2170 cifs_dbg(VFS, "error %d create cifsd thread\n", rc);
2171 module_put(THIS_MODULE);
2172 goto out_err_crypto_release;
2174 tcp_ses->tcpStatus = CifsNeedNegotiate;
2176 /* thread spawned, put it on the list */
2177 spin_lock(&cifs_tcp_ses_lock);
2178 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
2179 spin_unlock(&cifs_tcp_ses_lock);
2181 cifs_fscache_get_client_cookie(tcp_ses);
2183 /* queue echo request delayed work */
2184 queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL);
2188 out_err_crypto_release:
2189 cifs_crypto_shash_release(tcp_ses);
2191 put_net(cifs_net_ns(tcp_ses));
2195 if (!IS_ERR(tcp_ses->hostname))
2196 kfree(tcp_ses->hostname);
2197 if (tcp_ses->ssocket)
2198 sock_release(tcp_ses->ssocket);
2204 static int match_session(struct cifs_ses *ses, struct smb_vol *vol)
2206 if (vol->sectype != Unspecified &&
2207 vol->sectype != ses->sectype)
2210 switch (ses->sectype) {
2212 if (!uid_eq(vol->cred_uid, ses->cred_uid))
2216 /* NULL username means anonymous session */
2217 if (ses->user_name == NULL) {
2223 /* anything else takes username/password */
2224 if (strncmp(ses->user_name,
2225 vol->username ? vol->username : "",
2226 CIFS_MAX_USERNAME_LEN))
2228 if (strlen(vol->username) != 0 &&
2229 ses->password != NULL &&
2230 strncmp(ses->password,
2231 vol->password ? vol->password : "",
2232 CIFS_MAX_PASSWORD_LEN))
2238 static struct cifs_ses *
2239 cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
2241 struct cifs_ses *ses;
2243 spin_lock(&cifs_tcp_ses_lock);
2244 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2245 if (!match_session(ses, vol))
2248 spin_unlock(&cifs_tcp_ses_lock);
2251 spin_unlock(&cifs_tcp_ses_lock);
2256 cifs_put_smb_ses(struct cifs_ses *ses)
2259 struct TCP_Server_Info *server = ses->server;
2261 cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count);
2262 spin_lock(&cifs_tcp_ses_lock);
2263 if (--ses->ses_count > 0) {
2264 spin_unlock(&cifs_tcp_ses_lock);
2268 list_del_init(&ses->smb_ses_list);
2269 spin_unlock(&cifs_tcp_ses_lock);
2271 if (ses->status == CifsGood && server->ops->logoff) {
2273 server->ops->logoff(xid, ses);
2277 cifs_put_tcp_session(server);
2282 /* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */
2283 #define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1)
2285 /* Populate username and pw fields from keyring if possible */
2287 cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
2290 char *desc, *delim, *payload;
2293 struct TCP_Server_Info *server = ses->server;
2294 struct sockaddr_in *sa;
2295 struct sockaddr_in6 *sa6;
2296 struct user_key_payload *upayload;
2298 desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL);
2302 /* try to find an address key first */
2303 switch (server->dstaddr.ss_family) {
2305 sa = (struct sockaddr_in *)&server->dstaddr;
2306 sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr);
2309 sa6 = (struct sockaddr_in6 *)&server->dstaddr;
2310 sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr);
2313 cifs_dbg(FYI, "Bad ss_family (%hu)\n",
2314 server->dstaddr.ss_family);
2319 cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc);
2320 key = request_key(&key_type_logon, desc, "");
2322 if (!ses->domainName) {
2323 cifs_dbg(FYI, "domainName is NULL\n");
2328 /* didn't work, try to find a domain key */
2329 sprintf(desc, "cifs:d:%s", ses->domainName);
2330 cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc);
2331 key = request_key(&key_type_logon, desc, "");
2338 down_read(&key->sem);
2339 upayload = key->payload.data;
2340 if (IS_ERR_OR_NULL(upayload)) {
2341 rc = upayload ? PTR_ERR(upayload) : -EINVAL;
2345 /* find first : in payload */
2346 payload = (char *)upayload->data;
2347 delim = strnchr(payload, upayload->datalen, ':');
2348 cifs_dbg(FYI, "payload=%s\n", payload);
2350 cifs_dbg(FYI, "Unable to find ':' in payload (datalen=%d)\n",
2356 len = delim - payload;
2357 if (len > CIFS_MAX_USERNAME_LEN || len <= 0) {
2358 cifs_dbg(FYI, "Bad value from username search (len=%zd)\n",
2364 vol->username = kstrndup(payload, len, GFP_KERNEL);
2365 if (!vol->username) {
2366 cifs_dbg(FYI, "Unable to allocate %zd bytes for username\n",
2371 cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username);
2373 len = key->datalen - (len + 1);
2374 if (len > CIFS_MAX_PASSWORD_LEN || len <= 0) {
2375 cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len);
2377 kfree(vol->username);
2378 vol->username = NULL;
2383 vol->password = kstrndup(delim, len, GFP_KERNEL);
2384 if (!vol->password) {
2385 cifs_dbg(FYI, "Unable to allocate %zd bytes for password\n",
2388 kfree(vol->username);
2389 vol->username = NULL;
2398 cifs_dbg(FYI, "%s: returning %d\n", __func__, rc);
2401 #else /* ! CONFIG_KEYS */
2403 cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)),
2404 struct cifs_ses *ses __attribute__((unused)))
2408 #endif /* CONFIG_KEYS */
2410 static struct cifs_ses *
2411 cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
2415 struct cifs_ses *ses;
2416 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
2417 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
2421 ses = cifs_find_smb_ses(server, volume_info);
2423 cifs_dbg(FYI, "Existing smb sess found (status=%d)\n",
2426 mutex_lock(&ses->session_mutex);
2427 rc = cifs_negotiate_protocol(xid, ses);
2429 mutex_unlock(&ses->session_mutex);
2430 /* problem -- put our ses reference */
2431 cifs_put_smb_ses(ses);
2435 if (ses->need_reconnect) {
2436 cifs_dbg(FYI, "Session needs reconnect\n");
2437 rc = cifs_setup_session(xid, ses,
2438 volume_info->local_nls);
2440 mutex_unlock(&ses->session_mutex);
2441 /* problem -- put our reference */
2442 cifs_put_smb_ses(ses);
2447 mutex_unlock(&ses->session_mutex);
2449 /* existing SMB ses has a server reference already */
2450 cifs_put_tcp_session(server);
2455 cifs_dbg(FYI, "Existing smb sess not found\n");
2456 ses = sesInfoAlloc();
2460 /* new SMB session uses our server ref */
2461 ses->server = server;
2462 if (server->dstaddr.ss_family == AF_INET6)
2463 sprintf(ses->serverName, "%pI6", &addr6->sin6_addr);
2465 sprintf(ses->serverName, "%pI4", &addr->sin_addr);
2467 if (volume_info->username) {
2468 ses->user_name = kstrdup(volume_info->username, GFP_KERNEL);
2469 if (!ses->user_name)
2473 /* volume_info->password freed at unmount */
2474 if (volume_info->password) {
2475 ses->password = kstrdup(volume_info->password, GFP_KERNEL);
2479 if (volume_info->domainname) {
2480 ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL);
2481 if (!ses->domainName)
2484 ses->cred_uid = volume_info->cred_uid;
2485 ses->linux_uid = volume_info->linux_uid;
2487 ses->sectype = volume_info->sectype;
2488 ses->sign = volume_info->sign;
2490 mutex_lock(&ses->session_mutex);
2491 rc = cifs_negotiate_protocol(xid, ses);
2493 rc = cifs_setup_session(xid, ses, volume_info->local_nls);
2494 mutex_unlock(&ses->session_mutex);
2498 /* success, put it on the list */
2499 spin_lock(&cifs_tcp_ses_lock);
2500 list_add(&ses->smb_ses_list, &server->smb_ses_list);
2501 spin_unlock(&cifs_tcp_ses_lock);
2512 static int match_tcon(struct cifs_tcon *tcon, const char *unc)
2514 if (tcon->tidStatus == CifsExiting)
2516 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
2521 static struct cifs_tcon *
2522 cifs_find_tcon(struct cifs_ses *ses, const char *unc)
2524 struct list_head *tmp;
2525 struct cifs_tcon *tcon;
2527 spin_lock(&cifs_tcp_ses_lock);
2528 list_for_each(tmp, &ses->tcon_list) {
2529 tcon = list_entry(tmp, struct cifs_tcon, tcon_list);
2530 if (!match_tcon(tcon, unc))
2533 spin_unlock(&cifs_tcp_ses_lock);
2536 spin_unlock(&cifs_tcp_ses_lock);
2541 cifs_put_tcon(struct cifs_tcon *tcon)
2544 struct cifs_ses *ses = tcon->ses;
2546 cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count);
2547 spin_lock(&cifs_tcp_ses_lock);
2548 if (--tcon->tc_count > 0) {
2549 spin_unlock(&cifs_tcp_ses_lock);
2553 list_del_init(&tcon->tcon_list);
2554 spin_unlock(&cifs_tcp_ses_lock);
2557 if (ses->server->ops->tree_disconnect)
2558 ses->server->ops->tree_disconnect(xid, tcon);
2561 cifs_fscache_release_super_cookie(tcon);
2563 cifs_put_smb_ses(ses);
2566 static struct cifs_tcon *
2567 cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
2570 struct cifs_tcon *tcon;
2572 tcon = cifs_find_tcon(ses, volume_info->UNC);
2574 cifs_dbg(FYI, "Found match on UNC path\n");
2575 /* existing tcon already has a reference */
2576 cifs_put_smb_ses(ses);
2577 if (tcon->seal != volume_info->seal)
2578 cifs_dbg(VFS, "transport encryption setting conflicts with existing tid\n");
2582 if (!ses->server->ops->tree_connect) {
2587 tcon = tconInfoAlloc();
2594 if (volume_info->password) {
2595 tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
2596 if (!tcon->password) {
2603 * BB Do we need to wrap session_mutex around this TCon call and Unix
2604 * SetFS as we do on SessSetup and reconnect?
2607 rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon,
2608 volume_info->local_nls);
2610 cifs_dbg(FYI, "Tcon rc = %d\n", rc);
2614 if (volume_info->nodfs) {
2615 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
2616 cifs_dbg(FYI, "DFS disabled (%d)\n", tcon->Flags);
2618 tcon->seal = volume_info->seal;
2620 * We can have only one retry value for a connection to a share so for
2621 * resources mounted more than once to the same server share the last
2622 * value passed in for the retry flag is used.
2624 tcon->retry = volume_info->retry;
2625 tcon->nocase = volume_info->nocase;
2626 tcon->local_lease = volume_info->local_lease;
2627 INIT_LIST_HEAD(&tcon->pending_opens);
2629 spin_lock(&cifs_tcp_ses_lock);
2630 list_add(&tcon->tcon_list, &ses->tcon_list);
2631 spin_unlock(&cifs_tcp_ses_lock);
2633 cifs_fscache_get_super_cookie(tcon);
2643 cifs_put_tlink(struct tcon_link *tlink)
2645 if (!tlink || IS_ERR(tlink))
2648 if (!atomic_dec_and_test(&tlink->tl_count) ||
2649 test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) {
2650 tlink->tl_time = jiffies;
2654 if (!IS_ERR(tlink_tcon(tlink)))
2655 cifs_put_tcon(tlink_tcon(tlink));
2660 static inline struct tcon_link *
2661 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
2663 return cifs_sb->master_tlink;
2667 compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data)
2669 struct cifs_sb_info *old = CIFS_SB(sb);
2670 struct cifs_sb_info *new = mnt_data->cifs_sb;
2672 if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK))
2675 if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) !=
2676 (new->mnt_cifs_flags & CIFS_MOUNT_MASK))
2680 * We want to share sb only if we don't specify an r/wsize or
2681 * specified r/wsize is greater than or equal to existing one.
2683 if (new->wsize && new->wsize < old->wsize)
2686 if (new->rsize && new->rsize < old->rsize)
2689 if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid))
2692 if (old->mnt_file_mode != new->mnt_file_mode ||
2693 old->mnt_dir_mode != new->mnt_dir_mode)
2696 if (strcmp(old->local_nls->charset, new->local_nls->charset))
2699 if (old->actimeo != new->actimeo)
2706 cifs_match_super(struct super_block *sb, void *data)
2708 struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data;
2709 struct smb_vol *volume_info;
2710 struct cifs_sb_info *cifs_sb;
2711 struct TCP_Server_Info *tcp_srv;
2712 struct cifs_ses *ses;
2713 struct cifs_tcon *tcon;
2714 struct tcon_link *tlink;
2717 spin_lock(&cifs_tcp_ses_lock);
2718 cifs_sb = CIFS_SB(sb);
2719 tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
2720 if (IS_ERR(tlink)) {
2721 spin_unlock(&cifs_tcp_ses_lock);
2724 tcon = tlink_tcon(tlink);
2726 tcp_srv = ses->server;
2728 volume_info = mnt_data->vol;
2730 if (!match_server(tcp_srv, volume_info) ||
2731 !match_session(ses, volume_info) ||
2732 !match_tcon(tcon, volume_info->UNC)) {
2737 rc = compare_mount_options(sb, mnt_data);
2739 spin_unlock(&cifs_tcp_ses_lock);
2740 cifs_put_tlink(tlink);
2745 get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path,
2746 const struct nls_table *nls_codepage, unsigned int *num_referrals,
2747 struct dfs_info3_param **referrals, int remap)
2752 if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer)
2758 if (ses->ipc_tid == 0) {
2759 temp_unc = kmalloc(2 /* for slashes */ +
2760 strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2)
2761 + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL);
2762 if (temp_unc == NULL)
2766 strcpy(temp_unc + 2, ses->serverName);
2767 strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$");
2768 rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL,
2770 cifs_dbg(FYI, "Tcon rc = %d ipc_tid = %d\n", rc, ses->ipc_tid);
2774 rc = ses->server->ops->get_dfs_refer(xid, ses, old_path,
2775 referrals, num_referrals,
2776 nls_codepage, remap);
2778 * BB - map targetUNCs to dfs_info3 structures, here or in
2779 * ses->server->ops->get_dfs_refer.
2785 #ifdef CONFIG_DEBUG_LOCK_ALLOC
2786 static struct lock_class_key cifs_key[2];
2787 static struct lock_class_key cifs_slock_key[2];
2790 cifs_reclassify_socket4(struct socket *sock)
2792 struct sock *sk = sock->sk;
2793 BUG_ON(sock_owned_by_user(sk));
2794 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
2795 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
2799 cifs_reclassify_socket6(struct socket *sock)
2801 struct sock *sk = sock->sk;
2802 BUG_ON(sock_owned_by_user(sk));
2803 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
2804 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
2808 cifs_reclassify_socket4(struct socket *sock)
2813 cifs_reclassify_socket6(struct socket *sock)
2818 /* See RFC1001 section 14 on representation of Netbios names */
2819 static void rfc1002mangle(char *target, char *source, unsigned int length)
2823 for (i = 0, j = 0; i < (length); i++) {
2824 /* mask a nibble at a time and encode */
2825 target[j] = 'A' + (0x0F & (source[i] >> 4));
2826 target[j+1] = 'A' + (0x0F & source[i]);
2833 bind_socket(struct TCP_Server_Info *server)
2836 if (server->srcaddr.ss_family != AF_UNSPEC) {
2837 /* Bind to the specified local IP address */
2838 struct socket *socket = server->ssocket;
2839 rc = socket->ops->bind(socket,
2840 (struct sockaddr *) &server->srcaddr,
2841 sizeof(server->srcaddr));
2843 struct sockaddr_in *saddr4;
2844 struct sockaddr_in6 *saddr6;
2845 saddr4 = (struct sockaddr_in *)&server->srcaddr;
2846 saddr6 = (struct sockaddr_in6 *)&server->srcaddr;
2847 if (saddr6->sin6_family == AF_INET6)
2848 cifs_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n",
2849 &saddr6->sin6_addr, rc);
2851 cifs_dbg(VFS, "Failed to bind to: %pI4, error: %d\n",
2852 &saddr4->sin_addr.s_addr, rc);
2859 ip_rfc1001_connect(struct TCP_Server_Info *server)
2863 * some servers require RFC1001 sessinit before sending
2864 * negprot - BB check reconnection in case where second
2865 * sessinit is sent but no second negprot
2867 struct rfc1002_session_packet *ses_init_buf;
2868 struct smb_hdr *smb_buf;
2869 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
2872 ses_init_buf->trailer.session_req.called_len = 32;
2874 if (server->server_RFC1001_name &&
2875 server->server_RFC1001_name[0] != 0)
2876 rfc1002mangle(ses_init_buf->trailer.
2877 session_req.called_name,
2878 server->server_RFC1001_name,
2879 RFC1001_NAME_LEN_WITH_NULL);
2881 rfc1002mangle(ses_init_buf->trailer.
2882 session_req.called_name,
2883 DEFAULT_CIFS_CALLED_NAME,
2884 RFC1001_NAME_LEN_WITH_NULL);
2886 ses_init_buf->trailer.session_req.calling_len = 32;
2889 * calling name ends in null (byte 16) from old smb
2892 if (server->workstation_RFC1001_name &&
2893 server->workstation_RFC1001_name[0] != 0)
2894 rfc1002mangle(ses_init_buf->trailer.
2895 session_req.calling_name,
2896 server->workstation_RFC1001_name,
2897 RFC1001_NAME_LEN_WITH_NULL);
2899 rfc1002mangle(ses_init_buf->trailer.
2900 session_req.calling_name,
2902 RFC1001_NAME_LEN_WITH_NULL);
2904 ses_init_buf->trailer.session_req.scope1 = 0;
2905 ses_init_buf->trailer.session_req.scope2 = 0;
2906 smb_buf = (struct smb_hdr *)ses_init_buf;
2908 /* sizeof RFC1002_SESSION_REQUEST with no scope */
2909 smb_buf->smb_buf_length = cpu_to_be32(0x81000044);
2910 rc = smb_send(server, smb_buf, 0x44);
2911 kfree(ses_init_buf);
2913 * RFC1001 layer in at least one server
2914 * requires very short break before negprot
2915 * presumably because not expecting negprot
2916 * to follow so fast. This is a simple
2917 * solution that works without
2918 * complicating the code and causes no
2919 * significant slowing down on mount
2922 usleep_range(1000, 2000);
2925 * else the negprot may still work without this
2926 * even though malloc failed
2933 generic_ip_connect(struct TCP_Server_Info *server)
2938 struct socket *socket = server->ssocket;
2939 struct sockaddr *saddr;
2941 saddr = (struct sockaddr *) &server->dstaddr;
2943 if (server->dstaddr.ss_family == AF_INET6) {
2944 sport = ((struct sockaddr_in6 *) saddr)->sin6_port;
2945 slen = sizeof(struct sockaddr_in6);
2948 sport = ((struct sockaddr_in *) saddr)->sin_port;
2949 slen = sizeof(struct sockaddr_in);
2953 if (socket == NULL) {
2954 rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM,
2955 IPPROTO_TCP, &socket, 1);
2957 cifs_dbg(VFS, "Error %d creating socket\n", rc);
2958 server->ssocket = NULL;
2962 /* BB other socket options to set KEEPALIVE, NODELAY? */
2963 cifs_dbg(FYI, "Socket created\n");
2964 server->ssocket = socket;
2965 socket->sk->sk_allocation = GFP_NOFS;
2966 if (sfamily == AF_INET6)
2967 cifs_reclassify_socket6(socket);
2969 cifs_reclassify_socket4(socket);
2972 rc = bind_socket(server);
2977 * Eventually check for other socket options to change from
2978 * the default. sock_setsockopt not used because it expects
2981 socket->sk->sk_rcvtimeo = 7 * HZ;
2982 socket->sk->sk_sndtimeo = 5 * HZ;
2984 /* make the bufsizes depend on wsize/rsize and max requests */
2985 if (server->noautotune) {
2986 if (socket->sk->sk_sndbuf < (200 * 1024))
2987 socket->sk->sk_sndbuf = 200 * 1024;
2988 if (socket->sk->sk_rcvbuf < (140 * 1024))
2989 socket->sk->sk_rcvbuf = 140 * 1024;
2992 if (server->tcp_nodelay) {
2994 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
2995 (char *)&val, sizeof(val));
2997 cifs_dbg(FYI, "set TCP_NODELAY socket option error %d\n",
3001 cifs_dbg(FYI, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n",
3002 socket->sk->sk_sndbuf,
3003 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
3005 rc = socket->ops->connect(socket, saddr, slen, 0);
3007 cifs_dbg(FYI, "Error %d connecting to server\n", rc);
3008 sock_release(socket);
3009 server->ssocket = NULL;
3013 if (sport == htons(RFC1001_PORT))
3014 rc = ip_rfc1001_connect(server);
3020 ip_connect(struct TCP_Server_Info *server)
3023 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
3024 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
3026 if (server->dstaddr.ss_family == AF_INET6)
3027 sport = &addr6->sin6_port;
3029 sport = &addr->sin_port;
3034 /* try with 445 port at first */
3035 *sport = htons(CIFS_PORT);
3037 rc = generic_ip_connect(server);
3041 /* if it failed, try with 139 port */
3042 *sport = htons(RFC1001_PORT);
3045 return generic_ip_connect(server);
3048 void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon,
3049 struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info)
3051 /* if we are reconnecting then should we check to see if
3052 * any requested capabilities changed locally e.g. via
3053 * remount but we can not do much about it here
3054 * if they have (even if we could detect it by the following)
3055 * Perhaps we could add a backpointer to array of sb from tcon
3056 * or if we change to make all sb to same share the same
3057 * sb as NFS - then we only have one backpointer to sb.
3058 * What if we wanted to mount the server share twice once with
3059 * and once without posixacls or posix paths? */
3060 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
3062 if (vol_info && vol_info->no_linux_ext) {
3063 tcon->fsUnixInfo.Capability = 0;
3064 tcon->unix_ext = 0; /* Unix Extensions disabled */
3065 cifs_dbg(FYI, "Linux protocol extensions disabled\n");
3067 } else if (vol_info)
3068 tcon->unix_ext = 1; /* Unix Extensions supported */
3070 if (tcon->unix_ext == 0) {
3071 cifs_dbg(FYI, "Unix extensions disabled so not set on reconnect\n");
3075 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
3076 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
3077 cifs_dbg(FYI, "unix caps which server supports %lld\n", cap);
3078 /* check for reconnect case in which we do not
3079 want to change the mount behavior if we can avoid it */
3080 if (vol_info == NULL) {
3081 /* turn off POSIX ACL and PATHNAMES if not set
3082 originally at mount time */
3083 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
3084 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
3085 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
3086 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
3087 cifs_dbg(VFS, "POSIXPATH support change\n");
3088 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
3089 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
3090 cifs_dbg(VFS, "possible reconnect error\n");
3091 cifs_dbg(VFS, "server disabled POSIX path support\n");
3095 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
3096 cifs_dbg(VFS, "per-share encryption not supported yet\n");
3098 cap &= CIFS_UNIX_CAP_MASK;
3099 if (vol_info && vol_info->no_psx_acl)
3100 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
3101 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
3102 cifs_dbg(FYI, "negotiated posix acl support\n");
3104 cifs_sb->mnt_cifs_flags |=
3105 CIFS_MOUNT_POSIXACL;
3108 if (vol_info && vol_info->posix_paths == 0)
3109 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
3110 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
3111 cifs_dbg(FYI, "negotiate posix pathnames\n");
3113 cifs_sb->mnt_cifs_flags |=
3114 CIFS_MOUNT_POSIX_PATHS;
3117 cifs_dbg(FYI, "Negotiate caps 0x%x\n", (int)cap);
3118 #ifdef CONFIG_CIFS_DEBUG2
3119 if (cap & CIFS_UNIX_FCNTL_CAP)
3120 cifs_dbg(FYI, "FCNTL cap\n");
3121 if (cap & CIFS_UNIX_EXTATTR_CAP)
3122 cifs_dbg(FYI, "EXTATTR cap\n");
3123 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
3124 cifs_dbg(FYI, "POSIX path cap\n");
3125 if (cap & CIFS_UNIX_XATTR_CAP)
3126 cifs_dbg(FYI, "XATTR cap\n");
3127 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
3128 cifs_dbg(FYI, "POSIX ACL cap\n");
3129 if (cap & CIFS_UNIX_LARGE_READ_CAP)
3130 cifs_dbg(FYI, "very large read cap\n");
3131 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
3132 cifs_dbg(FYI, "very large write cap\n");
3133 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP)
3134 cifs_dbg(FYI, "transport encryption cap\n");
3135 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
3136 cifs_dbg(FYI, "mandatory transport encryption cap\n");
3137 #endif /* CIFS_DEBUG2 */
3138 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
3139 if (vol_info == NULL) {
3140 cifs_dbg(FYI, "resetting capabilities failed\n");
3142 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");
3148 void cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
3149 struct cifs_sb_info *cifs_sb)
3151 INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks);
3153 spin_lock_init(&cifs_sb->tlink_tree_lock);
3154 cifs_sb->tlink_tree = RB_ROOT;
3157 * Temporarily set r/wsize for matching superblock. If we end up using
3158 * new sb then client will later negotiate it downward if needed.
3160 cifs_sb->rsize = pvolume_info->rsize;
3161 cifs_sb->wsize = pvolume_info->wsize;
3163 cifs_sb->mnt_uid = pvolume_info->linux_uid;
3164 cifs_sb->mnt_gid = pvolume_info->linux_gid;
3165 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
3166 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
3167 cifs_dbg(FYI, "file mode: 0x%hx dir mode: 0x%hx\n",
3168 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
3170 cifs_sb->actimeo = pvolume_info->actimeo;
3171 cifs_sb->local_nls = pvolume_info->local_nls;
3173 if (pvolume_info->noperm)
3174 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
3175 if (pvolume_info->setuids)
3176 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
3177 if (pvolume_info->server_ino)
3178 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
3179 if (pvolume_info->remap)
3180 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
3181 if (pvolume_info->no_xattr)
3182 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
3183 if (pvolume_info->sfu_emul)
3184 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
3185 if (pvolume_info->nobrl)
3186 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
3187 if (pvolume_info->nostrictsync)
3188 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
3189 if (pvolume_info->mand_lock)
3190 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
3191 if (pvolume_info->rwpidforward)
3192 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
3193 if (pvolume_info->cifs_acl)
3194 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
3195 if (pvolume_info->backupuid_specified) {
3196 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID;
3197 cifs_sb->mnt_backupuid = pvolume_info->backupuid;
3199 if (pvolume_info->backupgid_specified) {
3200 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID;
3201 cifs_sb->mnt_backupgid = pvolume_info->backupgid;
3203 if (pvolume_info->override_uid)
3204 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
3205 if (pvolume_info->override_gid)
3206 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
3207 if (pvolume_info->dynperm)
3208 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
3209 if (pvolume_info->fsc)
3210 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
3211 if (pvolume_info->multiuser)
3212 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
3213 CIFS_MOUNT_NO_PERM);
3214 if (pvolume_info->strict_io)
3215 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
3216 if (pvolume_info->direct_io) {
3217 cifs_dbg(FYI, "mounting share using direct i/o\n");
3218 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
3220 if (pvolume_info->mfsymlinks) {
3221 if (pvolume_info->sfu_emul) {
3222 cifs_dbg(VFS, "mount option mfsymlinks ignored if sfu mount option is used\n");
3224 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
3228 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
3229 cifs_dbg(VFS, "mount option dynperm ignored if cifsacl mount option supported\n");
3233 cleanup_volume_info_contents(struct smb_vol *volume_info)
3235 kfree(volume_info->username);
3236 kzfree(volume_info->password);
3237 kfree(volume_info->UNC);
3238 kfree(volume_info->domainname);
3239 kfree(volume_info->iocharset);
3240 kfree(volume_info->prepath);
3244 cifs_cleanup_volume_info(struct smb_vol *volume_info)
3248 cleanup_volume_info_contents(volume_info);
3253 #ifdef CONFIG_CIFS_DFS_UPCALL
3255 * cifs_build_path_to_root returns full path to root when we do not have an
3256 * exiting connection (tcon)
3259 build_unc_path_to_root(const struct smb_vol *vol,
3260 const struct cifs_sb_info *cifs_sb)
3262 char *full_path, *pos;
3263 unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0;
3264 unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1);
3266 full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL);
3267 if (full_path == NULL)
3268 return ERR_PTR(-ENOMEM);
3270 strncpy(full_path, vol->UNC, unc_len);
3271 pos = full_path + unc_len;
3274 *pos = CIFS_DIR_SEP(cifs_sb);
3275 strncpy(pos + 1, vol->prepath, pplen);
3279 *pos = '\0'; /* add trailing null */
3280 convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
3281 cifs_dbg(FYI, "%s: full_path=%s\n", __func__, full_path);
3286 * Perform a dfs referral query for a share and (optionally) prefix
3288 * If a referral is found, cifs_sb->mountdata will be (re-)allocated
3289 * to a string containing updated options for the submount. Otherwise it
3290 * will be left untouched.
3292 * Returns the rc from get_dfs_path to the caller, which can be used to
3293 * determine whether there were referrals.
3296 expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses,
3297 struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb,
3301 unsigned int num_referrals = 0;
3302 struct dfs_info3_param *referrals = NULL;
3303 char *full_path = NULL, *ref_path = NULL, *mdata = NULL;
3305 full_path = build_unc_path_to_root(volume_info, cifs_sb);
3306 if (IS_ERR(full_path))
3307 return PTR_ERR(full_path);
3309 /* For DFS paths, skip the first '\' of the UNC */
3310 ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1;
3312 rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls,
3313 &num_referrals, &referrals,
3314 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
3316 if (!rc && num_referrals > 0) {
3317 char *fake_devname = NULL;
3319 mdata = cifs_compose_mount_options(cifs_sb->mountdata,
3320 full_path + 1, referrals,
3323 free_dfs_info_array(referrals, num_referrals);
3325 if (IS_ERR(mdata)) {
3326 rc = PTR_ERR(mdata);
3329 cleanup_volume_info_contents(volume_info);
3330 rc = cifs_setup_volume_info(volume_info, mdata,
3333 kfree(fake_devname);
3334 kfree(cifs_sb->mountdata);
3335 cifs_sb->mountdata = mdata;
3343 cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
3344 const char *devname)
3348 if (cifs_parse_mount_options(mount_data, devname, volume_info))
3351 if (volume_info->nullauth) {
3352 cifs_dbg(FYI, "Anonymous login\n");
3353 kfree(volume_info->username);
3354 volume_info->username = NULL;
3355 } else if (volume_info->username) {
3356 /* BB fixme parse for domain name here */
3357 cifs_dbg(FYI, "Username: %s\n", volume_info->username);
3359 cifs_dbg(VFS, "No username specified\n");
3360 /* In userspace mount helper we can get user name from alternate
3361 locations such as env variables and files on disk */
3365 /* this is needed for ASCII cp to Unicode converts */
3366 if (volume_info->iocharset == NULL) {
3367 /* load_nls_default cannot return null */
3368 volume_info->local_nls = load_nls_default();
3370 volume_info->local_nls = load_nls(volume_info->iocharset);
3371 if (volume_info->local_nls == NULL) {
3372 cifs_dbg(VFS, "CIFS mount error: iocharset %s not found\n",
3373 volume_info->iocharset);
3382 cifs_get_volume_info(char *mount_data, const char *devname)
3385 struct smb_vol *volume_info;
3387 volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL);
3389 return ERR_PTR(-ENOMEM);
3391 rc = cifs_setup_volume_info(volume_info, mount_data, devname);
3393 cifs_cleanup_volume_info(volume_info);
3394 volume_info = ERR_PTR(rc);
3401 cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
3405 struct cifs_ses *ses;
3406 struct cifs_tcon *tcon;
3407 struct TCP_Server_Info *server;
3409 struct tcon_link *tlink;
3410 #ifdef CONFIG_CIFS_DFS_UPCALL
3411 int referral_walks_count = 0;
3414 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
3418 #ifdef CONFIG_CIFS_DFS_UPCALL
3420 /* cleanup activities if we're chasing a referral */
3421 if (referral_walks_count) {
3423 cifs_put_tcon(tcon);
3425 cifs_put_smb_ses(ses);
3439 /* get a reference to a tcp session */
3440 server = cifs_get_tcp_session(volume_info);
3441 if (IS_ERR(server)) {
3442 rc = PTR_ERR(server);
3443 bdi_destroy(&cifs_sb->bdi);
3447 /* get a reference to a SMB session */
3448 ses = cifs_get_smb_ses(server, volume_info);
3452 goto mount_fail_check;
3455 /* search for existing tcon to this server share */
3456 tcon = cifs_get_tcon(ses, volume_info);
3460 goto remote_path_check;
3463 /* tell server which Unix caps we support */
3464 if (cap_unix(tcon->ses)) {
3465 /* reset of caps checks mount to see if unix extensions
3466 disabled for just this mount */
3467 reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info);
3468 if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) &&
3469 (le64_to_cpu(tcon->fsUnixInfo.Capability) &
3470 CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) {
3472 goto mount_fail_check;
3475 tcon->unix_ext = 0; /* server does not support them */
3477 /* do not care if a following call succeed - informational */
3478 if (!tcon->ipc && server->ops->qfs_tcon)
3479 server->ops->qfs_tcon(xid, tcon);
3481 cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info);
3482 cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info);
3484 /* tune readahead according to rsize */
3485 cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE;
3488 #ifdef CONFIG_CIFS_DFS_UPCALL
3490 * Perform an unconditional check for whether there are DFS
3491 * referrals for this path without prefix, to provide support
3492 * for DFS referrals from w2k8 servers which don't seem to respond
3493 * with PATH_NOT_COVERED to requests that include the prefix.
3494 * Chase the referral if found, otherwise continue normally.
3496 if (referral_walks_count == 0) {
3497 int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb,
3500 referral_walks_count++;
3501 goto try_mount_again;
3506 /* check if a whole path is not remote */
3508 if (!server->ops->is_path_accessible) {
3510 goto mount_fail_check;
3513 * cifs_build_path_to_root works only when we have a valid tcon
3515 full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon);
3516 if (full_path == NULL) {
3518 goto mount_fail_check;
3520 rc = server->ops->is_path_accessible(xid, tcon, cifs_sb,
3522 if (rc != 0 && rc != -EREMOTE) {
3524 goto mount_fail_check;
3529 /* get referral if needed */
3530 if (rc == -EREMOTE) {
3531 #ifdef CONFIG_CIFS_DFS_UPCALL
3532 if (referral_walks_count > MAX_NESTED_LINKS) {
3534 * BB: when we implement proper loop detection,
3535 * we will remove this check. But now we need it
3536 * to prevent an indefinite loop if 'DFS tree' is
3537 * misconfigured (i.e. has loops).
3540 goto mount_fail_check;
3543 rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true);
3546 referral_walks_count++;
3547 goto try_mount_again;
3549 goto mount_fail_check;
3550 #else /* No DFS support, return error on mount */
3556 goto mount_fail_check;
3558 /* now, hang the tcon off of the superblock */
3559 tlink = kzalloc(sizeof *tlink, GFP_KERNEL);
3560 if (tlink == NULL) {
3562 goto mount_fail_check;
3565 tlink->tl_uid = ses->linux_uid;
3566 tlink->tl_tcon = tcon;
3567 tlink->tl_time = jiffies;
3568 set_bit(TCON_LINK_MASTER, &tlink->tl_flags);
3569 set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3571 cifs_sb->master_tlink = tlink;
3572 spin_lock(&cifs_sb->tlink_tree_lock);
3573 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
3574 spin_unlock(&cifs_sb->tlink_tree_lock);
3576 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
3580 /* on error free sesinfo and tcon struct if needed */
3582 /* If find_unc succeeded then rc == 0 so we can not end */
3583 /* up accidentally freeing someone elses tcon struct */
3585 cifs_put_tcon(tcon);
3587 cifs_put_smb_ses(ses);
3589 cifs_put_tcp_session(server);
3590 bdi_destroy(&cifs_sb->bdi);
3599 * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon
3600 * pointer may be NULL.
3603 CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
3604 const char *tree, struct cifs_tcon *tcon,
3605 const struct nls_table *nls_codepage)
3607 struct smb_hdr *smb_buffer;
3608 struct smb_hdr *smb_buffer_response;
3611 unsigned char *bcc_ptr;
3614 __u16 bytes_left, count;
3619 smb_buffer = cifs_buf_get();
3620 if (smb_buffer == NULL)
3623 smb_buffer_response = smb_buffer;
3625 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3626 NULL /*no tid */ , 4 /*wct */ );
3628 smb_buffer->Mid = get_next_mid(ses->server);
3629 smb_buffer->Uid = ses->Suid;
3630 pSMB = (TCONX_REQ *) smb_buffer;
3631 pSMBr = (TCONX_RSP *) smb_buffer_response;
3633 pSMB->AndXCommand = 0xFF;
3634 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3635 bcc_ptr = &pSMB->Password[0];
3636 if (!tcon || (ses->server->sec_mode & SECMODE_USER)) {
3637 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
3638 *bcc_ptr = 0; /* password is null byte */
3639 bcc_ptr++; /* skip password */
3640 /* already aligned so no need to do it below */
3642 pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
3643 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3644 specified as required (when that support is added to
3645 the vfs in the future) as only NTLM or the much
3646 weaker LANMAN (which we do not send by default) is accepted
3647 by Samba (not sure whether other servers allow
3648 NTLMv2 password here) */
3649 #ifdef CONFIG_CIFS_WEAK_PW_HASH
3650 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
3651 (ses->sectype == LANMAN))
3652 calc_lanman_hash(tcon->password, ses->server->cryptkey,
3653 ses->server->sec_mode &
3654 SECMODE_PW_ENCRYPT ? true : false,
3657 #endif /* CIFS_WEAK_PW_HASH */
3658 rc = SMBNTencrypt(tcon->password, ses->server->cryptkey,
3659 bcc_ptr, nls_codepage);
3661 bcc_ptr += CIFS_AUTH_RESP_SIZE;
3662 if (ses->capabilities & CAP_UNICODE) {
3663 /* must align unicode strings */
3664 *bcc_ptr = 0; /* null byte password */
3669 if (ses->server->sign)
3670 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3672 if (ses->capabilities & CAP_STATUS32) {
3673 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3675 if (ses->capabilities & CAP_DFS) {
3676 smb_buffer->Flags2 |= SMBFLG2_DFS;
3678 if (ses->capabilities & CAP_UNICODE) {
3679 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3681 cifs_strtoUTF16((__le16 *) bcc_ptr, tree,
3682 6 /* max utf8 char length in bytes */ *
3683 (/* server len*/ + 256 /* share len */), nls_codepage);
3684 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
3685 bcc_ptr += 2; /* skip trailing null */
3686 } else { /* ASCII */
3687 strcpy(bcc_ptr, tree);
3688 bcc_ptr += strlen(tree) + 1;
3690 strcpy(bcc_ptr, "?????");
3691 bcc_ptr += strlen("?????");
3693 count = bcc_ptr - &pSMB->Password[0];
3694 pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu(
3695 pSMB->hdr.smb_buf_length) + count);
3696 pSMB->ByteCount = cpu_to_le16(count);
3698 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
3701 /* above now done in SendReceive */
3702 if ((rc == 0) && (tcon != NULL)) {
3705 tcon->tidStatus = CifsGood;
3706 tcon->need_reconnect = false;
3707 tcon->tid = smb_buffer_response->Tid;
3708 bcc_ptr = pByteArea(smb_buffer_response);
3709 bytes_left = get_bcc(smb_buffer_response);
3710 length = strnlen(bcc_ptr, bytes_left - 2);
3711 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
3717 /* skip service field (NB: this field is always ASCII) */
3719 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3720 (bcc_ptr[2] == 'C')) {
3721 cifs_dbg(FYI, "IPC connection\n");
3724 } else if (length == 2) {
3725 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3726 /* the most common case */
3727 cifs_dbg(FYI, "disk share connection\n");
3730 bcc_ptr += length + 1;
3731 bytes_left -= (length + 1);
3732 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
3734 /* mostly informational -- no need to fail on error here */
3735 kfree(tcon->nativeFileSystem);
3736 tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr,
3737 bytes_left, is_unicode,
3740 cifs_dbg(FYI, "nativeFileSystem=%s\n", tcon->nativeFileSystem);
3742 if ((smb_buffer_response->WordCount == 3) ||
3743 (smb_buffer_response->WordCount == 7))
3744 /* field is in same location */
3745 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3748 cifs_dbg(FYI, "Tcon flags: 0x%x\n", tcon->Flags);
3749 } else if ((rc == 0) && tcon == NULL) {
3750 /* all we need to save for IPC$ connection */
3751 ses->ipc_tid = smb_buffer_response->Tid;
3754 cifs_buf_release(smb_buffer);
3759 cifs_umount(struct cifs_sb_info *cifs_sb)
3761 struct rb_root *root = &cifs_sb->tlink_tree;
3762 struct rb_node *node;
3763 struct tcon_link *tlink;
3765 cancel_delayed_work_sync(&cifs_sb->prune_tlinks);
3767 spin_lock(&cifs_sb->tlink_tree_lock);
3768 while ((node = rb_first(root))) {
3769 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3770 cifs_get_tlink(tlink);
3771 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3772 rb_erase(node, root);
3774 spin_unlock(&cifs_sb->tlink_tree_lock);
3775 cifs_put_tlink(tlink);
3776 spin_lock(&cifs_sb->tlink_tree_lock);
3778 spin_unlock(&cifs_sb->tlink_tree_lock);
3780 bdi_destroy(&cifs_sb->bdi);
3781 kfree(cifs_sb->mountdata);
3782 unload_nls(cifs_sb->local_nls);
3787 cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses)
3790 struct TCP_Server_Info *server = ses->server;
3792 if (!server->ops->need_neg || !server->ops->negotiate)
3795 /* only send once per connect */
3796 if (!server->ops->need_neg(server))
3799 set_credits(server, 1);
3801 rc = server->ops->negotiate(xid, ses);
3803 spin_lock(&GlobalMid_Lock);
3804 if (server->tcpStatus == CifsNeedNegotiate)
3805 server->tcpStatus = CifsGood;
3808 spin_unlock(&GlobalMid_Lock);
3815 cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
3816 struct nls_table *nls_info)
3819 struct TCP_Server_Info *server = ses->server;
3821 ses->capabilities = server->capabilities;
3822 if (linuxExtEnabled == 0)
3823 ses->capabilities &= (~server->vals->cap_unix);
3825 cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n",
3826 server->sec_mode, server->capabilities, server->timeAdj);
3828 if (server->ops->sess_setup)
3829 rc = server->ops->sess_setup(xid, ses, nls_info);
3832 cifs_dbg(VFS, "Send error in SessSetup = %d\n", rc);
3838 cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses)
3840 vol->sectype = ses->sectype;
3842 /* krb5 is special, since we don't need username or pw */
3843 if (vol->sectype == Kerberos)
3846 return cifs_set_cifscreds(vol, ses);
3849 static struct cifs_tcon *
3850 cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid)
3853 struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb);
3854 struct cifs_ses *ses;
3855 struct cifs_tcon *tcon = NULL;
3856 struct smb_vol *vol_info;
3858 vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL);
3859 if (vol_info == NULL)
3860 return ERR_PTR(-ENOMEM);
3862 vol_info->local_nls = cifs_sb->local_nls;
3863 vol_info->linux_uid = fsuid;
3864 vol_info->cred_uid = fsuid;
3865 vol_info->UNC = master_tcon->treeName;
3866 vol_info->retry = master_tcon->retry;
3867 vol_info->nocase = master_tcon->nocase;
3868 vol_info->local_lease = master_tcon->local_lease;
3869 vol_info->no_linux_ext = !master_tcon->unix_ext;
3870 vol_info->sectype = master_tcon->ses->sectype;
3871 vol_info->sign = master_tcon->ses->sign;
3873 rc = cifs_set_vol_auth(vol_info, master_tcon->ses);
3879 /* get a reference for the same TCP session */
3880 spin_lock(&cifs_tcp_ses_lock);
3881 ++master_tcon->ses->server->srv_count;
3882 spin_unlock(&cifs_tcp_ses_lock);
3884 ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info);
3886 tcon = (struct cifs_tcon *)ses;
3887 cifs_put_tcp_session(master_tcon->ses->server);
3891 tcon = cifs_get_tcon(ses, vol_info);
3893 cifs_put_smb_ses(ses);
3898 reset_cifs_unix_caps(0, tcon, NULL, vol_info);
3900 kfree(vol_info->username);
3901 kfree(vol_info->password);
3908 cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb)
3910 return tlink_tcon(cifs_sb_master_tlink(cifs_sb));
3914 cifs_sb_tcon_pending_wait(void *unused)
3917 return signal_pending(current) ? -ERESTARTSYS : 0;
3920 /* find and return a tlink with given uid */
3921 static struct tcon_link *
3922 tlink_rb_search(struct rb_root *root, kuid_t uid)
3924 struct rb_node *node = root->rb_node;
3925 struct tcon_link *tlink;
3928 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3930 if (uid_gt(tlink->tl_uid, uid))
3931 node = node->rb_left;
3932 else if (uid_lt(tlink->tl_uid, uid))
3933 node = node->rb_right;
3940 /* insert a tcon_link into the tree */
3942 tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink)
3944 struct rb_node **new = &(root->rb_node), *parent = NULL;
3945 struct tcon_link *tlink;
3948 tlink = rb_entry(*new, struct tcon_link, tl_rbnode);
3951 if (uid_gt(tlink->tl_uid, new_tlink->tl_uid))
3952 new = &((*new)->rb_left);
3954 new = &((*new)->rb_right);
3957 rb_link_node(&new_tlink->tl_rbnode, parent, new);
3958 rb_insert_color(&new_tlink->tl_rbnode, root);
3962 * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the
3965 * If the superblock doesn't refer to a multiuser mount, then just return
3966 * the master tcon for the mount.
3968 * First, search the rbtree for an existing tcon for this fsuid. If one
3969 * exists, then check to see if it's pending construction. If it is then wait
3970 * for construction to complete. Once it's no longer pending, check to see if
3971 * it failed and either return an error or retry construction, depending on
3974 * If one doesn't exist then insert a new tcon_link struct into the tree and
3975 * try to construct a new one.
3978 cifs_sb_tlink(struct cifs_sb_info *cifs_sb)
3981 kuid_t fsuid = current_fsuid();
3982 struct tcon_link *tlink, *newtlink;
3984 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER))
3985 return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
3987 spin_lock(&cifs_sb->tlink_tree_lock);
3988 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
3990 cifs_get_tlink(tlink);
3991 spin_unlock(&cifs_sb->tlink_tree_lock);
3993 if (tlink == NULL) {
3994 newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL);
3995 if (newtlink == NULL)
3996 return ERR_PTR(-ENOMEM);
3997 newtlink->tl_uid = fsuid;
3998 newtlink->tl_tcon = ERR_PTR(-EACCES);
3999 set_bit(TCON_LINK_PENDING, &newtlink->tl_flags);
4000 set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags);
4001 cifs_get_tlink(newtlink);
4003 spin_lock(&cifs_sb->tlink_tree_lock);
4004 /* was one inserted after previous search? */
4005 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
4007 cifs_get_tlink(tlink);
4008 spin_unlock(&cifs_sb->tlink_tree_lock);
4010 goto wait_for_construction;
4013 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
4014 spin_unlock(&cifs_sb->tlink_tree_lock);
4016 wait_for_construction:
4017 ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING,
4018 cifs_sb_tcon_pending_wait,
4019 TASK_INTERRUPTIBLE);
4021 cifs_put_tlink(tlink);
4022 return ERR_PTR(ret);
4025 /* if it's good, return it */
4026 if (!IS_ERR(tlink->tl_tcon))
4029 /* return error if we tried this already recently */
4030 if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) {
4031 cifs_put_tlink(tlink);
4032 return ERR_PTR(-EACCES);
4035 if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags))
4036 goto wait_for_construction;
4039 tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid);
4040 clear_bit(TCON_LINK_PENDING, &tlink->tl_flags);
4041 wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING);
4043 if (IS_ERR(tlink->tl_tcon)) {
4044 cifs_put_tlink(tlink);
4045 return ERR_PTR(-EACCES);
4052 * periodic workqueue job that scans tcon_tree for a superblock and closes
4056 cifs_prune_tlinks(struct work_struct *work)
4058 struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info,
4060 struct rb_root *root = &cifs_sb->tlink_tree;
4061 struct rb_node *node = rb_first(root);
4062 struct rb_node *tmp;
4063 struct tcon_link *tlink;
4066 * Because we drop the spinlock in the loop in order to put the tlink
4067 * it's not guarded against removal of links from the tree. The only
4068 * places that remove entries from the tree are this function and
4069 * umounts. Because this function is non-reentrant and is canceled
4070 * before umount can proceed, this is safe.
4072 spin_lock(&cifs_sb->tlink_tree_lock);
4073 node = rb_first(root);
4074 while (node != NULL) {
4076 node = rb_next(tmp);
4077 tlink = rb_entry(tmp, struct tcon_link, tl_rbnode);
4079 if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) ||
4080 atomic_read(&tlink->tl_count) != 0 ||
4081 time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies))
4084 cifs_get_tlink(tlink);
4085 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
4086 rb_erase(tmp, root);
4088 spin_unlock(&cifs_sb->tlink_tree_lock);
4089 cifs_put_tlink(tlink);
4090 spin_lock(&cifs_sb->tlink_tree_lock);
4092 spin_unlock(&cifs_sb->tlink_tree_lock);
4094 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,