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_noblocksend, Opt_noautotune,
71 Opt_hard, Opt_soft, Opt_perm, Opt_noperm,
72 Opt_mapchars, Opt_nomapchars, Opt_sfu,
73 Opt_nosfu, Opt_nodfs, Opt_posixpaths,
74 Opt_noposixpaths, Opt_nounix,
77 Opt_forcemandatorylock, Opt_setuids,
78 Opt_nosetuids, Opt_dynperm, Opt_nodynperm,
79 Opt_nohard, Opt_nosoft,
81 Opt_nostrictsync, Opt_strictsync,
82 Opt_serverino, Opt_noserverino,
83 Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl,
84 Opt_acl, Opt_noacl, Opt_locallease,
85 Opt_sign, Opt_seal, Opt_noac,
86 Opt_fsc, Opt_mfsymlinks,
87 Opt_multiuser, Opt_sloppy,
89 /* Mount options which take numeric value */
90 Opt_backupuid, Opt_backupgid, Opt_uid,
91 Opt_cruid, Opt_gid, Opt_file_mode,
92 Opt_dirmode, Opt_port,
93 Opt_rsize, Opt_wsize, Opt_actimeo,
95 /* Mount options which take string value */
96 Opt_user, Opt_pass, Opt_ip,
98 Opt_srcaddr, Opt_prefixpath,
99 Opt_iocharset, Opt_sockopt,
100 Opt_netbiosname, Opt_servern,
101 Opt_ver, Opt_vers, Opt_sec, Opt_cache,
103 /* Mount options to be ignored */
106 /* Options which could be blank */
114 static const match_table_t cifs_mount_option_tokens = {
116 { Opt_user_xattr, "user_xattr" },
117 { Opt_nouser_xattr, "nouser_xattr" },
118 { Opt_forceuid, "forceuid" },
119 { Opt_noforceuid, "noforceuid" },
120 { Opt_noblocksend, "noblocksend" },
121 { Opt_noautotune, "noautotune" },
122 { Opt_hard, "hard" },
123 { Opt_soft, "soft" },
124 { Opt_perm, "perm" },
125 { Opt_noperm, "noperm" },
126 { Opt_mapchars, "mapchars" },
127 { Opt_nomapchars, "nomapchars" },
129 { Opt_nosfu, "nosfu" },
130 { Opt_nodfs, "nodfs" },
131 { Opt_posixpaths, "posixpaths" },
132 { Opt_noposixpaths, "noposixpaths" },
133 { Opt_nounix, "nounix" },
134 { Opt_nounix, "nolinux" },
135 { Opt_nocase, "nocase" },
136 { Opt_nocase, "ignorecase" },
138 { Opt_nobrl, "nobrl" },
139 { Opt_nobrl, "nolock" },
140 { Opt_forcemandatorylock, "forcemandatorylock" },
141 { Opt_forcemandatorylock, "forcemand" },
142 { Opt_setuids, "setuids" },
143 { Opt_nosetuids, "nosetuids" },
144 { Opt_dynperm, "dynperm" },
145 { Opt_nodynperm, "nodynperm" },
146 { Opt_nohard, "nohard" },
147 { Opt_nosoft, "nosoft" },
148 { Opt_nointr, "nointr" },
149 { Opt_intr, "intr" },
150 { Opt_nostrictsync, "nostrictsync" },
151 { Opt_strictsync, "strictsync" },
152 { Opt_serverino, "serverino" },
153 { Opt_noserverino, "noserverino" },
154 { Opt_rwpidforward, "rwpidforward" },
155 { Opt_cifsacl, "cifsacl" },
156 { Opt_nocifsacl, "nocifsacl" },
158 { Opt_noacl, "noacl" },
159 { Opt_locallease, "locallease" },
160 { Opt_sign, "sign" },
161 { Opt_seal, "seal" },
162 { Opt_noac, "noac" },
164 { Opt_mfsymlinks, "mfsymlinks" },
165 { Opt_multiuser, "multiuser" },
166 { Opt_sloppy, "sloppy" },
168 { Opt_backupuid, "backupuid=%s" },
169 { Opt_backupgid, "backupgid=%s" },
170 { Opt_uid, "uid=%s" },
171 { Opt_cruid, "cruid=%s" },
172 { Opt_gid, "gid=%s" },
173 { Opt_file_mode, "file_mode=%s" },
174 { Opt_dirmode, "dirmode=%s" },
175 { Opt_dirmode, "dir_mode=%s" },
176 { Opt_port, "port=%s" },
177 { Opt_rsize, "rsize=%s" },
178 { Opt_wsize, "wsize=%s" },
179 { Opt_actimeo, "actimeo=%s" },
181 { Opt_blank_user, "user=" },
182 { Opt_blank_user, "username=" },
183 { Opt_user, "user=%s" },
184 { Opt_user, "username=%s" },
185 { Opt_blank_pass, "pass=" },
186 { Opt_pass, "pass=%s" },
187 { Opt_pass, "password=%s" },
188 { Opt_blank_ip, "ip=" },
189 { Opt_blank_ip, "addr=" },
191 { Opt_ip, "addr=%s" },
192 { Opt_unc, "unc=%s" },
193 { Opt_unc, "target=%s" },
194 { Opt_unc, "path=%s" },
195 { Opt_domain, "dom=%s" },
196 { Opt_domain, "domain=%s" },
197 { Opt_domain, "workgroup=%s" },
198 { Opt_srcaddr, "srcaddr=%s" },
199 { Opt_prefixpath, "prefixpath=%s" },
200 { Opt_iocharset, "iocharset=%s" },
201 { Opt_sockopt, "sockopt=%s" },
202 { Opt_netbiosname, "netbiosname=%s" },
203 { Opt_servern, "servern=%s" },
204 { Opt_ver, "ver=%s" },
205 { Opt_vers, "vers=%s" },
206 { Opt_sec, "sec=%s" },
207 { Opt_cache, "cache=%s" },
209 { Opt_ignore, "cred" },
210 { Opt_ignore, "credentials" },
211 { Opt_ignore, "cred=%s" },
212 { Opt_ignore, "credentials=%s" },
213 { Opt_ignore, "guest" },
214 { Opt_ignore, "rw" },
215 { Opt_ignore, "ro" },
216 { Opt_ignore, "suid" },
217 { Opt_ignore, "nosuid" },
218 { Opt_ignore, "exec" },
219 { Opt_ignore, "noexec" },
220 { Opt_ignore, "nodev" },
221 { Opt_ignore, "noauto" },
222 { Opt_ignore, "dev" },
223 { Opt_ignore, "mand" },
224 { Opt_ignore, "nomand" },
225 { Opt_ignore, "_netdev" },
231 Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p,
232 Opt_sec_ntlmsspi, Opt_sec_ntlmssp,
233 Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2,
234 Opt_sec_ntlmv2i, Opt_sec_lanman,
240 static const match_table_t cifs_secflavor_tokens = {
241 { Opt_sec_krb5, "krb5" },
242 { Opt_sec_krb5i, "krb5i" },
243 { Opt_sec_krb5p, "krb5p" },
244 { Opt_sec_ntlmsspi, "ntlmsspi" },
245 { Opt_sec_ntlmssp, "ntlmssp" },
246 { Opt_ntlm, "ntlm" },
247 { Opt_sec_ntlmi, "ntlmi" },
248 { Opt_sec_ntlmv2, "nontlm" },
249 { Opt_sec_ntlmv2, "ntlmv2" },
250 { Opt_sec_ntlmv2i, "ntlmv2i" },
251 { Opt_sec_lanman, "lanman" },
252 { Opt_sec_none, "none" },
254 { Opt_sec_err, NULL }
265 static const match_table_t cifs_cacheflavor_tokens = {
266 { Opt_cache_loose, "loose" },
267 { Opt_cache_strict, "strict" },
268 { Opt_cache_none, "none" },
269 { Opt_cache_err, NULL }
272 static const match_table_t cifs_smb_version_tokens = {
273 { Smb_1, SMB1_VERSION_STRING },
274 { Smb_21, SMB21_VERSION_STRING },
275 { Smb_30, SMB30_VERSION_STRING },
278 static int ip_connect(struct TCP_Server_Info *server);
279 static int generic_ip_connect(struct TCP_Server_Info *server);
280 static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink);
281 static void cifs_prune_tlinks(struct work_struct *work);
282 static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
283 const char *devname);
286 * cifs tcp session reconnection
288 * mark tcp session as reconnecting so temporarily locked
289 * mark all smb sessions as reconnecting for tcp session
290 * reconnect tcp session
291 * wake up waiters on reconnection? - (not needed currently)
294 cifs_reconnect(struct TCP_Server_Info *server)
297 struct list_head *tmp, *tmp2;
298 struct cifs_ses *ses;
299 struct cifs_tcon *tcon;
300 struct mid_q_entry *mid_entry;
301 struct list_head retry_list;
303 spin_lock(&GlobalMid_Lock);
304 if (server->tcpStatus == CifsExiting) {
305 /* the demux thread will exit normally
306 next time through the loop */
307 spin_unlock(&GlobalMid_Lock);
310 server->tcpStatus = CifsNeedReconnect;
311 spin_unlock(&GlobalMid_Lock);
313 #ifdef CONFIG_CIFS_SMB2
314 server->max_read = 0;
317 cFYI(1, "Reconnecting tcp session");
319 /* before reconnecting the tcp session, mark the smb session (uid)
320 and the tid bad so they are not used until reconnected */
321 cFYI(1, "%s: marking sessions and tcons for reconnect", __func__);
322 spin_lock(&cifs_tcp_ses_lock);
323 list_for_each(tmp, &server->smb_ses_list) {
324 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
325 ses->need_reconnect = true;
327 list_for_each(tmp2, &ses->tcon_list) {
328 tcon = list_entry(tmp2, struct cifs_tcon, tcon_list);
329 tcon->need_reconnect = true;
332 spin_unlock(&cifs_tcp_ses_lock);
334 /* do not want to be sending data on a socket we are freeing */
335 cFYI(1, "%s: tearing down socket", __func__);
336 mutex_lock(&server->srv_mutex);
337 if (server->ssocket) {
338 cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state,
339 server->ssocket->flags);
340 kernel_sock_shutdown(server->ssocket, SHUT_WR);
341 cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx",
342 server->ssocket->state,
343 server->ssocket->flags);
344 sock_release(server->ssocket);
345 server->ssocket = NULL;
347 server->sequence_number = 0;
348 server->session_estab = false;
349 kfree(server->session_key.response);
350 server->session_key.response = NULL;
351 server->session_key.len = 0;
352 server->lstrp = jiffies;
353 mutex_unlock(&server->srv_mutex);
355 /* mark submitted MIDs for retry and issue callback */
356 INIT_LIST_HEAD(&retry_list);
357 cFYI(1, "%s: moving mids to private list", __func__);
358 spin_lock(&GlobalMid_Lock);
359 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
360 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
361 if (mid_entry->mid_state == MID_REQUEST_SUBMITTED)
362 mid_entry->mid_state = MID_RETRY_NEEDED;
363 list_move(&mid_entry->qhead, &retry_list);
365 spin_unlock(&GlobalMid_Lock);
367 cFYI(1, "%s: issuing mid callbacks", __func__);
368 list_for_each_safe(tmp, tmp2, &retry_list) {
369 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
370 list_del_init(&mid_entry->qhead);
371 mid_entry->callback(mid_entry);
377 /* we should try only the port we connected to before */
378 rc = generic_ip_connect(server);
380 cFYI(1, "reconnect error %d", rc);
383 atomic_inc(&tcpSesReconnectCount);
384 spin_lock(&GlobalMid_Lock);
385 if (server->tcpStatus != CifsExiting)
386 server->tcpStatus = CifsNeedNegotiate;
387 spin_unlock(&GlobalMid_Lock);
389 } while (server->tcpStatus == CifsNeedReconnect);
395 cifs_echo_request(struct work_struct *work)
398 struct TCP_Server_Info *server = container_of(work,
399 struct TCP_Server_Info, echo.work);
402 * We cannot send an echo if it is disabled or until the
403 * NEGOTIATE_PROTOCOL request is done, which is indicated by
404 * server->ops->need_neg() == true. Also, no need to ping if
405 * we got a response recently.
407 if (!server->ops->need_neg || server->ops->need_neg(server) ||
408 (server->ops->can_echo && !server->ops->can_echo(server)) ||
409 time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ))
412 rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS;
414 cFYI(1, "Unable to send echo request to server: %s",
418 queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL);
422 allocate_buffers(struct TCP_Server_Info *server)
424 if (!server->bigbuf) {
425 server->bigbuf = (char *)cifs_buf_get();
426 if (!server->bigbuf) {
427 cERROR(1, "No memory for large SMB response");
429 /* retry will check if exiting */
432 } else if (server->large_buf) {
433 /* we are reusing a dirty large buf, clear its start */
434 memset(server->bigbuf, 0, HEADER_SIZE(server));
437 if (!server->smallbuf) {
438 server->smallbuf = (char *)cifs_small_buf_get();
439 if (!server->smallbuf) {
440 cERROR(1, "No memory for SMB response");
442 /* retry will check if exiting */
445 /* beginning of smb buffer is cleared in our buf_get */
447 /* if existing small buf clear beginning */
448 memset(server->smallbuf, 0, HEADER_SIZE(server));
455 server_unresponsive(struct TCP_Server_Info *server)
458 * We need to wait 2 echo intervals to make sure we handle such
460 * 1s client sends a normal SMB request
461 * 2s client gets a response
462 * 30s echo workqueue job pops, and decides we got a response recently
463 * and don't need to send another
465 * 65s kernel_recvmsg times out, and we see that we haven't gotten
466 * a response in >60s.
468 if (server->tcpStatus == CifsGood &&
469 time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) {
470 cERROR(1, "Server %s has not responded in %d seconds. "
471 "Reconnecting...", server->hostname,
472 (2 * SMB_ECHO_INTERVAL) / HZ);
473 cifs_reconnect(server);
474 wake_up(&server->response_q);
482 * kvec_array_init - clone a kvec array, and advance into it
483 * @new: pointer to memory for cloned array
484 * @iov: pointer to original array
485 * @nr_segs: number of members in original array
486 * @bytes: number of bytes to advance into the cloned array
488 * This function will copy the array provided in iov to a section of memory
489 * and advance the specified number of bytes into the new array. It returns
490 * the number of segments in the new array. "new" must be at least as big as
491 * the original iov array.
494 kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs,
499 while (bytes || !iov->iov_len) {
500 int copy = min(bytes, iov->iov_len);
504 if (iov->iov_len == base) {
510 memcpy(new, iov, sizeof(*iov) * nr_segs);
511 new->iov_base += base;
512 new->iov_len -= base;
517 get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs)
519 struct kvec *new_iov;
521 if (server->iov && nr_segs <= server->nr_iov)
524 /* not big enough -- allocate a new one and release the old */
525 new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS);
528 server->iov = new_iov;
529 server->nr_iov = nr_segs;
535 cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig,
536 unsigned int nr_segs, unsigned int to_read)
541 struct msghdr smb_msg;
544 iov = get_server_iovec(server, nr_segs);
548 smb_msg.msg_control = NULL;
549 smb_msg.msg_controllen = 0;
551 for (total_read = 0; to_read; total_read += length, to_read -= length) {
554 if (server_unresponsive(server)) {
555 total_read = -EAGAIN;
559 segs = kvec_array_init(iov, iov_orig, nr_segs, total_read);
561 length = kernel_recvmsg(server->ssocket, &smb_msg,
562 iov, segs, to_read, 0);
564 if (server->tcpStatus == CifsExiting) {
565 total_read = -ESHUTDOWN;
567 } else if (server->tcpStatus == CifsNeedReconnect) {
568 cifs_reconnect(server);
569 total_read = -EAGAIN;
571 } else if (length == -ERESTARTSYS ||
575 * Minimum sleep to prevent looping, allowing socket
576 * to clear and app threads to set tcpStatus
577 * CifsNeedReconnect if server hung.
579 usleep_range(1000, 2000);
582 } else if (length <= 0) {
583 cFYI(1, "Received no data or error: expecting %d "
584 "got %d", to_read, length);
585 cifs_reconnect(server);
586 total_read = -EAGAIN;
594 cifs_read_from_socket(struct TCP_Server_Info *server, char *buf,
595 unsigned int to_read)
600 iov.iov_len = to_read;
602 return cifs_readv_from_socket(server, &iov, 1, to_read);
606 is_smb_response(struct TCP_Server_Info *server, unsigned char type)
609 * The first byte big endian of the length field,
610 * is actually not part of the length but the type
611 * with the most common, zero, as regular data.
614 case RFC1002_SESSION_MESSAGE:
615 /* Regular SMB response */
617 case RFC1002_SESSION_KEEP_ALIVE:
618 cFYI(1, "RFC 1002 session keep alive");
620 case RFC1002_POSITIVE_SESSION_RESPONSE:
621 cFYI(1, "RFC 1002 positive session response");
623 case RFC1002_NEGATIVE_SESSION_RESPONSE:
625 * We get this from Windows 98 instead of an error on
626 * SMB negprot response.
628 cFYI(1, "RFC 1002 negative session response");
629 /* give server a second to clean up */
632 * Always try 445 first on reconnect since we get NACK
633 * on some if we ever connected to port 139 (the NACK
634 * is since we do not begin with RFC1001 session
637 cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT);
638 cifs_reconnect(server);
639 wake_up(&server->response_q);
642 cERROR(1, "RFC 1002 unknown response type 0x%x", type);
643 cifs_reconnect(server);
650 dequeue_mid(struct mid_q_entry *mid, bool malformed)
652 #ifdef CONFIG_CIFS_STATS2
653 mid->when_received = jiffies;
655 spin_lock(&GlobalMid_Lock);
657 mid->mid_state = MID_RESPONSE_RECEIVED;
659 mid->mid_state = MID_RESPONSE_MALFORMED;
660 list_del_init(&mid->qhead);
661 spin_unlock(&GlobalMid_Lock);
665 handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server,
666 char *buf, int malformed)
668 if (server->ops->check_trans2 &&
669 server->ops->check_trans2(mid, server, buf, malformed))
672 mid->large_buf = server->large_buf;
673 /* Was previous buf put in mpx struct for multi-rsp? */
674 if (!mid->multiRsp) {
675 /* smb buffer will be freed by user thread */
676 if (server->large_buf)
677 server->bigbuf = NULL;
679 server->smallbuf = NULL;
681 dequeue_mid(mid, malformed);
684 static void clean_demultiplex_info(struct TCP_Server_Info *server)
688 /* take it off the list, if it's not already */
689 spin_lock(&cifs_tcp_ses_lock);
690 list_del_init(&server->tcp_ses_list);
691 spin_unlock(&cifs_tcp_ses_lock);
693 spin_lock(&GlobalMid_Lock);
694 server->tcpStatus = CifsExiting;
695 spin_unlock(&GlobalMid_Lock);
696 wake_up_all(&server->response_q);
698 /* check if we have blocked requests that need to free */
699 spin_lock(&server->req_lock);
700 if (server->credits <= 0)
702 spin_unlock(&server->req_lock);
704 * Although there should not be any requests blocked on this queue it
705 * can not hurt to be paranoid and try to wake up requests that may
706 * haven been blocked when more than 50 at time were on the wire to the
707 * same server - they now will see the session is in exit state and get
708 * out of SendReceive.
710 wake_up_all(&server->request_q);
711 /* give those requests time to exit */
714 if (server->ssocket) {
715 sock_release(server->ssocket);
716 server->ssocket = NULL;
719 if (!list_empty(&server->pending_mid_q)) {
720 struct list_head dispose_list;
721 struct mid_q_entry *mid_entry;
722 struct list_head *tmp, *tmp2;
724 INIT_LIST_HEAD(&dispose_list);
725 spin_lock(&GlobalMid_Lock);
726 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
727 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
728 cFYI(1, "Clearing mid 0x%llx", mid_entry->mid);
729 mid_entry->mid_state = MID_SHUTDOWN;
730 list_move(&mid_entry->qhead, &dispose_list);
732 spin_unlock(&GlobalMid_Lock);
734 /* now walk dispose list and issue callbacks */
735 list_for_each_safe(tmp, tmp2, &dispose_list) {
736 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
737 cFYI(1, "Callback mid 0x%llx", mid_entry->mid);
738 list_del_init(&mid_entry->qhead);
739 mid_entry->callback(mid_entry);
741 /* 1/8th of sec is more than enough time for them to exit */
745 if (!list_empty(&server->pending_mid_q)) {
747 * mpx threads have not exited yet give them at least the smb
748 * send timeout time for long ops.
750 * Due to delays on oplock break requests, we need to wait at
751 * least 45 seconds before giving up on a request getting a
752 * response and going ahead and killing cifsd.
754 cFYI(1, "Wait for exit from demultiplex thread");
757 * If threads still have not exited they are probably never
758 * coming home not much else we can do but free the memory.
762 kfree(server->hostname);
766 length = atomic_dec_return(&tcpSesAllocCount);
768 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
773 standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid)
776 char *buf = server->smallbuf;
777 unsigned int pdu_length = get_rfc1002_length(buf);
779 /* make sure this will fit in a large buffer */
780 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) {
781 cERROR(1, "SMB response too long (%u bytes)",
783 cifs_reconnect(server);
784 wake_up(&server->response_q);
788 /* switch to large buffer if too big for a small one */
789 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
790 server->large_buf = true;
791 memcpy(server->bigbuf, buf, server->total_read);
792 buf = server->bigbuf;
795 /* now read the rest */
796 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
797 pdu_length - HEADER_SIZE(server) + 1 + 4);
800 server->total_read += length;
802 dump_smb(buf, server->total_read);
805 * We know that we received enough to get to the MID as we
806 * checked the pdu_length earlier. Now check to see
807 * if the rest of the header is OK. We borrow the length
808 * var for the rest of the loop to avoid a new stack var.
810 * 48 bytes is enough to display the header and a little bit
811 * into the payload for debugging purposes.
813 length = server->ops->check_message(buf, server->total_read);
815 cifs_dump_mem("Bad SMB: ", buf,
816 min_t(unsigned int, server->total_read, 48));
818 if (server->ops->is_status_pending &&
819 server->ops->is_status_pending(buf, server, length))
825 handle_mid(mid, server, buf, length);
830 cifs_demultiplex_thread(void *p)
833 struct TCP_Server_Info *server = p;
834 unsigned int pdu_length;
836 struct task_struct *task_to_wake = NULL;
837 struct mid_q_entry *mid_entry;
839 current->flags |= PF_MEMALLOC;
840 cFYI(1, "Demultiplex PID: %d", task_pid_nr(current));
842 length = atomic_inc_return(&tcpSesAllocCount);
844 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
848 while (server->tcpStatus != CifsExiting) {
852 if (!allocate_buffers(server))
855 server->large_buf = false;
856 buf = server->smallbuf;
857 pdu_length = 4; /* enough to get RFC1001 header */
859 length = cifs_read_from_socket(server, buf, pdu_length);
862 server->total_read = length;
865 * The right amount was read from socket - 4 bytes,
866 * so we can now interpret the length field.
868 pdu_length = get_rfc1002_length(buf);
870 cFYI(1, "RFC1002 header 0x%x", pdu_length);
871 if (!is_smb_response(server, buf[0]))
874 /* make sure we have enough to get to the MID */
875 if (pdu_length < HEADER_SIZE(server) - 1 - 4) {
876 cERROR(1, "SMB response too short (%u bytes)",
878 cifs_reconnect(server);
879 wake_up(&server->response_q);
883 /* read down to the MID */
884 length = cifs_read_from_socket(server, buf + 4,
885 HEADER_SIZE(server) - 1 - 4);
888 server->total_read += length;
890 mid_entry = server->ops->find_mid(server, buf);
892 if (!mid_entry || !mid_entry->receive)
893 length = standard_receive3(server, mid_entry);
895 length = mid_entry->receive(server, mid_entry);
900 if (server->large_buf)
901 buf = server->bigbuf;
903 server->lstrp = jiffies;
904 if (mid_entry != NULL) {
905 if (!mid_entry->multiRsp || mid_entry->multiEnd)
906 mid_entry->callback(mid_entry);
907 } else if (!server->ops->is_oplock_break ||
908 !server->ops->is_oplock_break(buf, server)) {
909 cERROR(1, "No task to wake, unknown frame received! "
910 "NumMids %d", atomic_read(&midCount));
911 cifs_dump_mem("Received Data is: ", buf,
912 HEADER_SIZE(server));
913 #ifdef CONFIG_CIFS_DEBUG2
914 if (server->ops->dump_detail)
915 server->ops->dump_detail(buf);
916 cifs_dump_mids(server);
917 #endif /* CIFS_DEBUG2 */
920 } /* end while !EXITING */
922 /* buffer usually freed in free_mid - need to free it here on exit */
923 cifs_buf_release(server->bigbuf);
924 if (server->smallbuf) /* no sense logging a debug message if NULL */
925 cifs_small_buf_release(server->smallbuf);
927 task_to_wake = xchg(&server->tsk, NULL);
928 clean_demultiplex_info(server);
930 /* if server->tsk was NULL then wait for a signal before exiting */
932 set_current_state(TASK_INTERRUPTIBLE);
933 while (!signal_pending(current)) {
935 set_current_state(TASK_INTERRUPTIBLE);
937 set_current_state(TASK_RUNNING);
940 module_put_and_exit(0);
943 /* extract the host portion of the UNC string */
945 extract_hostname(const char *unc)
951 /* skip double chars at beginning of string */
952 /* BB: check validity of these bytes? */
955 /* delimiter between hostname and sharename is always '\\' now */
956 delim = strchr(src, '\\');
958 return ERR_PTR(-EINVAL);
961 dst = kmalloc((len + 1), GFP_KERNEL);
963 return ERR_PTR(-ENOMEM);
965 memcpy(dst, src, len);
971 static int get_option_ul(substring_t args[], unsigned long *option)
976 string = match_strdup(args);
979 rc = kstrtoul(string, 0, option);
986 static int cifs_parse_security_flavors(char *value,
990 substring_t args[MAX_OPT_ARGS];
992 switch (match_token(value, cifs_secflavor_tokens, args)) {
994 vol->secFlg |= CIFSSEC_MAY_KRB5;
997 vol->secFlg |= CIFSSEC_MAY_KRB5 | CIFSSEC_MUST_SIGN;
1000 /* vol->secFlg |= CIFSSEC_MUST_SEAL | CIFSSEC_MAY_KRB5; */
1001 cERROR(1, "Krb5 cifs privacy not supported");
1003 case Opt_sec_ntlmssp:
1004 vol->secFlg |= CIFSSEC_MAY_NTLMSSP;
1006 case Opt_sec_ntlmsspi:
1007 vol->secFlg |= CIFSSEC_MAY_NTLMSSP | CIFSSEC_MUST_SIGN;
1010 /* ntlm is default so can be turned off too */
1011 vol->secFlg |= CIFSSEC_MAY_NTLM;
1014 vol->secFlg |= CIFSSEC_MAY_NTLM | CIFSSEC_MUST_SIGN;
1016 case Opt_sec_ntlmv2:
1017 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
1019 case Opt_sec_ntlmv2i:
1020 vol->secFlg |= CIFSSEC_MAY_NTLMV2 | CIFSSEC_MUST_SIGN;
1022 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1023 case Opt_sec_lanman:
1024 vol->secFlg |= CIFSSEC_MAY_LANMAN;
1031 cERROR(1, "bad security option: %s", value);
1039 cifs_parse_cache_flavor(char *value, struct smb_vol *vol)
1041 substring_t args[MAX_OPT_ARGS];
1043 switch (match_token(value, cifs_cacheflavor_tokens, args)) {
1044 case Opt_cache_loose:
1045 vol->direct_io = false;
1046 vol->strict_io = false;
1048 case Opt_cache_strict:
1049 vol->direct_io = false;
1050 vol->strict_io = true;
1052 case Opt_cache_none:
1053 vol->direct_io = true;
1054 vol->strict_io = false;
1057 cERROR(1, "bad cache= option: %s", value);
1064 cifs_parse_smb_version(char *value, struct smb_vol *vol)
1066 substring_t args[MAX_OPT_ARGS];
1068 switch (match_token(value, cifs_smb_version_tokens, args)) {
1070 vol->ops = &smb1_operations;
1071 vol->vals = &smb1_values;
1073 #ifdef CONFIG_CIFS_SMB2
1075 vol->ops = &smb21_operations;
1076 vol->vals = &smb21_values;
1079 vol->ops = &smb21_operations; /* currently identical with 2.1 */
1080 vol->vals = &smb30_values;
1084 cERROR(1, "Unknown vers= option specified: %s", value);
1091 cifs_parse_mount_options(const char *mountdata, const char *devname,
1092 struct smb_vol *vol)
1095 char *mountdata_copy = NULL, *options;
1096 unsigned int temp_len, i, j;
1098 short int override_uid = -1;
1099 short int override_gid = -1;
1100 bool uid_specified = false;
1101 bool gid_specified = false;
1102 bool sloppy = false;
1103 char *invalid = NULL;
1104 char *nodename = utsname()->nodename;
1105 char *string = NULL;
1106 char *tmp_end, *value;
1111 delim = separator[0];
1114 * does not have to be perfect mapping since field is
1115 * informational, only used for servers that do not support
1116 * port 445 and it can be overridden at mount time
1118 memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
1119 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
1120 vol->source_rfc1001_name[i] = toupper(nodename[i]);
1122 vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
1123 /* null target name indicates to use *SMBSERVR default called name
1124 if we end up sending RFC1001 session initialize */
1125 vol->target_rfc1001_name[0] = 0;
1126 vol->cred_uid = current_uid();
1127 vol->linux_uid = current_uid();
1128 vol->linux_gid = current_gid();
1130 /* default to only allowing write access to owner of the mount */
1131 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
1133 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
1134 /* default is always to request posix paths. */
1135 vol->posix_paths = 1;
1136 /* default to using server inode numbers where available */
1137 vol->server_ino = 1;
1139 /* default is to use strict cifs caching semantics */
1140 vol->strict_io = true;
1142 vol->actimeo = CIFS_DEF_ACTIMEO;
1144 /* FIXME: add autonegotiation -- for now, SMB1 is default */
1145 vol->ops = &smb1_operations;
1146 vol->vals = &smb1_values;
1149 goto cifs_parse_mount_err;
1151 mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL);
1152 if (!mountdata_copy)
1153 goto cifs_parse_mount_err;
1155 options = mountdata_copy;
1156 end = options + strlen(options);
1158 if (strncmp(options, "sep=", 4) == 0) {
1159 if (options[4] != 0) {
1160 separator[0] = options[4];
1163 cFYI(1, "Null separator not allowed");
1166 vol->backupuid_specified = false; /* no backup intent for a user */
1167 vol->backupgid_specified = false; /* no backup intent for a group */
1169 while ((data = strsep(&options, separator)) != NULL) {
1170 substring_t args[MAX_OPT_ARGS];
1171 unsigned long option;
1177 token = match_token(data, cifs_mount_option_tokens, args);
1181 /* Ingnore the following */
1185 /* Boolean values */
1186 case Opt_user_xattr:
1189 case Opt_nouser_xattr:
1195 case Opt_noforceuid:
1198 case Opt_noblocksend:
1199 vol->noblocksnd = 1;
1201 case Opt_noautotune:
1202 vol->noautotune = 1;
1219 case Opt_nomapchars:
1231 case Opt_posixpaths:
1232 vol->posix_paths = 1;
1234 case Opt_noposixpaths:
1235 vol->posix_paths = 0;
1238 vol->no_linux_ext = 1;
1249 * turn off mandatory locking in mode
1250 * if remote locking is turned off since the
1251 * local vfs will do advisory
1253 if (vol->file_mode ==
1254 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1255 vol->file_mode = S_IALLUGO;
1257 case Opt_forcemandatorylock:
1267 vol->dynperm = true;
1270 vol->dynperm = false;
1284 case Opt_nostrictsync:
1285 vol->nostrictsync = 1;
1287 case Opt_strictsync:
1288 vol->nostrictsync = 0;
1291 vol->server_ino = 1;
1293 case Opt_noserverino:
1294 vol->server_ino = 0;
1296 case Opt_rwpidforward:
1297 vol->rwpidforward = 1;
1306 vol->no_psx_acl = 0;
1309 vol->no_psx_acl = 1;
1311 case Opt_locallease:
1312 vol->local_lease = 1;
1315 vol->secFlg |= CIFSSEC_MUST_SIGN;
1318 /* we do not do the following in secFlags because seal
1319 * is a per tree connection (mount) not a per socket
1320 * or per-smb connection option in the protocol
1321 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1326 printk(KERN_WARNING "CIFS: Mount option noac not "
1327 "supported. Instead set "
1328 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1331 #ifndef CONFIG_CIFS_FSCACHE
1332 cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE "
1333 "kernel config option set");
1334 goto cifs_parse_mount_err;
1338 case Opt_mfsymlinks:
1339 vol->mfsymlinks = true;
1342 vol->multiuser = true;
1348 /* Numeric Values */
1350 if (get_option_ul(args, &option)) {
1351 cERROR(1, "%s: Invalid backupuid value",
1353 goto cifs_parse_mount_err;
1355 vol->backupuid = option;
1356 vol->backupuid_specified = true;
1359 if (get_option_ul(args, &option)) {
1360 cERROR(1, "%s: Invalid backupgid value",
1362 goto cifs_parse_mount_err;
1364 vol->backupgid = option;
1365 vol->backupgid_specified = true;
1368 if (get_option_ul(args, &option)) {
1369 cERROR(1, "%s: Invalid uid value",
1371 goto cifs_parse_mount_err;
1373 vol->linux_uid = option;
1374 uid_specified = true;
1377 if (get_option_ul(args, &option)) {
1378 cERROR(1, "%s: Invalid cruid value",
1380 goto cifs_parse_mount_err;
1382 vol->cred_uid = option;
1385 if (get_option_ul(args, &option)) {
1386 cERROR(1, "%s: Invalid gid value",
1388 goto cifs_parse_mount_err;
1390 vol->linux_gid = option;
1391 gid_specified = true;
1394 if (get_option_ul(args, &option)) {
1395 cERROR(1, "%s: Invalid file_mode value",
1397 goto cifs_parse_mount_err;
1399 vol->file_mode = option;
1402 if (get_option_ul(args, &option)) {
1403 cERROR(1, "%s: Invalid dir_mode value",
1405 goto cifs_parse_mount_err;
1407 vol->dir_mode = option;
1410 if (get_option_ul(args, &option)) {
1411 cERROR(1, "%s: Invalid port value",
1413 goto cifs_parse_mount_err;
1418 if (get_option_ul(args, &option)) {
1419 cERROR(1, "%s: Invalid rsize value",
1421 goto cifs_parse_mount_err;
1423 vol->rsize = option;
1426 if (get_option_ul(args, &option)) {
1427 cERROR(1, "%s: Invalid wsize value",
1429 goto cifs_parse_mount_err;
1431 vol->wsize = option;
1434 if (get_option_ul(args, &option)) {
1435 cERROR(1, "%s: Invalid actimeo value",
1437 goto cifs_parse_mount_err;
1439 vol->actimeo = HZ * option;
1440 if (vol->actimeo > CIFS_MAX_ACTIMEO) {
1441 cERROR(1, "CIFS: attribute cache"
1442 "timeout too large");
1443 goto cifs_parse_mount_err;
1447 /* String Arguments */
1449 case Opt_blank_user:
1450 /* null user, ie. anonymous authentication */
1452 vol->username = NULL;
1455 string = match_strdup(args);
1459 if (strnlen(string, MAX_USERNAME_SIZE) >
1460 MAX_USERNAME_SIZE) {
1461 printk(KERN_WARNING "CIFS: username too long\n");
1462 goto cifs_parse_mount_err;
1464 vol->username = kstrdup(string, GFP_KERNEL);
1465 if (!vol->username) {
1466 printk(KERN_WARNING "CIFS: no memory "
1468 goto cifs_parse_mount_err;
1471 case Opt_blank_pass:
1472 vol->password = NULL;
1475 /* passwords have to be handled differently
1476 * to allow the character used for deliminator
1477 * to be passed within them
1480 /* Obtain the value string */
1481 value = strchr(data, '=');
1484 /* Set tmp_end to end of the string */
1485 tmp_end = (char *) value + strlen(value);
1487 /* Check if following character is the deliminator
1488 * If yes, we have encountered a double deliminator
1489 * reset the NULL character to the deliminator
1491 if (tmp_end < end && tmp_end[1] == delim) {
1494 /* Keep iterating until we get to a single
1495 * deliminator OR the end
1497 while ((tmp_end = strchr(tmp_end, delim))
1498 != NULL && (tmp_end[1] == delim)) {
1499 tmp_end = (char *) &tmp_end[2];
1502 /* Reset var options to point to next element */
1505 options = (char *) &tmp_end[1];
1507 /* Reached the end of the mount option
1512 /* Now build new password string */
1513 temp_len = strlen(value);
1514 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
1515 if (vol->password == NULL) {
1516 printk(KERN_WARNING "CIFS: no memory "
1518 goto cifs_parse_mount_err;
1521 for (i = 0, j = 0; i < temp_len; i++, j++) {
1522 vol->password[j] = value[i];
1523 if ((value[i] == delim) &&
1524 value[i+1] == delim)
1525 /* skip the second deliminator */
1528 vol->password[j] = '\0';
1534 string = match_strdup(args);
1538 if (strnlen(string, INET6_ADDRSTRLEN) >
1540 printk(KERN_WARNING "CIFS: ip address "
1542 goto cifs_parse_mount_err;
1544 vol->UNCip = kstrdup(string, GFP_KERNEL);
1546 printk(KERN_WARNING "CIFS: no memory "
1548 goto cifs_parse_mount_err;
1552 string = match_strdup(args);
1556 temp_len = strnlen(string, 300);
1557 if (temp_len == 300) {
1558 printk(KERN_WARNING "CIFS: UNC name too long\n");
1559 goto cifs_parse_mount_err;
1562 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1563 if (vol->UNC == NULL) {
1564 printk(KERN_WARNING "CIFS: no memory for UNC\n");
1565 goto cifs_parse_mount_err;
1567 strcpy(vol->UNC, string);
1569 if (strncmp(string, "//", 2) == 0) {
1572 } else if (strncmp(string, "\\\\", 2) != 0) {
1573 printk(KERN_WARNING "CIFS: UNC Path does not "
1574 "begin with // or \\\\\n");
1575 goto cifs_parse_mount_err;
1580 string = match_strdup(args);
1584 if (strnlen(string, 256) == 256) {
1585 printk(KERN_WARNING "CIFS: domain name too"
1587 goto cifs_parse_mount_err;
1590 vol->domainname = kstrdup(string, GFP_KERNEL);
1591 if (!vol->domainname) {
1592 printk(KERN_WARNING "CIFS: no memory "
1593 "for domainname\n");
1594 goto cifs_parse_mount_err;
1596 cFYI(1, "Domain name set");
1599 string = match_strdup(args);
1603 if (!cifs_convert_address(
1604 (struct sockaddr *)&vol->srcaddr,
1605 string, strlen(string))) {
1606 printk(KERN_WARNING "CIFS: Could not parse"
1607 " srcaddr: %s\n", string);
1608 goto cifs_parse_mount_err;
1611 case Opt_prefixpath:
1612 string = match_strdup(args);
1616 temp_len = strnlen(string, 1024);
1617 if (string[0] != '/')
1618 temp_len++; /* missing leading slash */
1619 if (temp_len > 1024) {
1620 printk(KERN_WARNING "CIFS: prefix too long\n");
1621 goto cifs_parse_mount_err;
1624 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1625 if (vol->prepath == NULL) {
1626 printk(KERN_WARNING "CIFS: no memory "
1627 "for path prefix\n");
1628 goto cifs_parse_mount_err;
1631 if (string[0] != '/') {
1632 vol->prepath[0] = '/';
1633 strcpy(vol->prepath+1, string);
1635 strcpy(vol->prepath, string);
1639 string = match_strdup(args);
1643 if (strnlen(string, 1024) >= 65) {
1644 printk(KERN_WARNING "CIFS: iocharset name "
1646 goto cifs_parse_mount_err;
1649 if (strnicmp(string, "default", 7) != 0) {
1650 vol->iocharset = kstrdup(string,
1652 if (!vol->iocharset) {
1653 printk(KERN_WARNING "CIFS: no memory"
1655 goto cifs_parse_mount_err;
1658 /* if iocharset not set then load_nls_default
1661 cFYI(1, "iocharset set to %s", string);
1664 string = match_strdup(args);
1668 if (strnicmp(string, "TCP_NODELAY", 11) == 0) {
1669 printk(KERN_WARNING "CIFS: the "
1670 "sockopt=TCP_NODELAY option has been "
1671 "deprecated and will be removed "
1673 vol->sockopt_tcp_nodelay = 1;
1676 case Opt_netbiosname:
1677 string = match_strdup(args);
1681 memset(vol->source_rfc1001_name, 0x20,
1684 * FIXME: are there cases in which a comma can
1685 * be valid in workstation netbios name (and
1686 * need special handling)?
1688 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1689 /* don't ucase netbiosname for user */
1692 vol->source_rfc1001_name[i] = string[i];
1694 /* The string has 16th byte zero still from
1695 * set at top of the function
1697 if (i == RFC1001_NAME_LEN && string[i] != 0)
1698 printk(KERN_WARNING "CIFS: netbiosname"
1699 " longer than 15 truncated.\n");
1703 /* servernetbiosname specified override *SMBSERVER */
1704 string = match_strdup(args);
1708 /* last byte, type, is 0x20 for servr type */
1709 memset(vol->target_rfc1001_name, 0x20,
1710 RFC1001_NAME_LEN_WITH_NULL);
1712 /* BB are there cases in which a comma can be
1713 valid in this workstation netbios name
1714 (and need special handling)? */
1716 /* user or mount helper must uppercase the
1718 for (i = 0; i < 15; i++) {
1721 vol->target_rfc1001_name[i] = string[i];
1723 /* The string has 16th byte zero still from
1724 set at top of the function */
1725 if (i == RFC1001_NAME_LEN && string[i] != 0)
1726 printk(KERN_WARNING "CIFS: server net"
1727 "biosname longer than 15 truncated.\n");
1730 string = match_strdup(args);
1734 if (strnicmp(string, "1", 1) == 0) {
1735 /* This is the default */
1738 /* For all other value, error */
1739 printk(KERN_WARNING "CIFS: Invalid version"
1741 goto cifs_parse_mount_err;
1743 string = match_strdup(args);
1747 if (cifs_parse_smb_version(string, vol) != 0)
1748 goto cifs_parse_mount_err;
1751 string = match_strdup(args);
1755 if (cifs_parse_security_flavors(string, vol) != 0)
1756 goto cifs_parse_mount_err;
1759 string = match_strdup(args);
1763 if (cifs_parse_cache_flavor(string, vol) != 0)
1764 goto cifs_parse_mount_err;
1768 * An option we don't recognize. Save it off for later
1769 * if we haven't already found one
1775 /* Free up any allocated string */
1780 if (!sloppy && invalid) {
1781 printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid);
1782 goto cifs_parse_mount_err;
1786 /* Muliuser mounts require CONFIG_KEYS support */
1787 if (vol->multiuser) {
1788 cERROR(1, "Multiuser mounts require kernels with "
1789 "CONFIG_KEYS enabled.");
1790 goto cifs_parse_mount_err;
1794 if (vol->UNCip == NULL)
1795 vol->UNCip = &vol->UNC[2];
1798 vol->override_uid = override_uid;
1799 else if (override_uid == 1)
1800 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1801 "specified with no uid= option.\n");
1804 vol->override_gid = override_gid;
1805 else if (override_gid == 1)
1806 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1807 "specified with no gid= option.\n");
1809 kfree(mountdata_copy);
1813 printk(KERN_WARNING "Could not allocate temporary buffer\n");
1814 cifs_parse_mount_err:
1816 kfree(mountdata_copy);
1820 /** Returns true if srcaddr isn't specified and rhs isn't
1821 * specified, or if srcaddr is specified and
1822 * matches the IP address of the rhs argument.
1825 srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs)
1827 switch (srcaddr->sa_family) {
1829 return (rhs->sa_family == AF_UNSPEC);
1831 struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr;
1832 struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs;
1833 return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr);
1836 struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr;
1837 struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs;
1838 return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr);
1842 return false; /* don't expect to be here */
1847 * If no port is specified in addr structure, we try to match with 445 port
1848 * and if it fails - with 139 ports. It should be called only if address
1849 * families of server and addr are equal.
1852 match_port(struct TCP_Server_Info *server, struct sockaddr *addr)
1854 __be16 port, *sport;
1856 switch (addr->sa_family) {
1858 sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port;
1859 port = ((struct sockaddr_in *) addr)->sin_port;
1862 sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port;
1863 port = ((struct sockaddr_in6 *) addr)->sin6_port;
1871 port = htons(CIFS_PORT);
1875 port = htons(RFC1001_PORT);
1878 return port == *sport;
1882 match_address(struct TCP_Server_Info *server, struct sockaddr *addr,
1883 struct sockaddr *srcaddr)
1885 switch (addr->sa_family) {
1887 struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
1888 struct sockaddr_in *srv_addr4 =
1889 (struct sockaddr_in *)&server->dstaddr;
1891 if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr)
1896 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
1897 struct sockaddr_in6 *srv_addr6 =
1898 (struct sockaddr_in6 *)&server->dstaddr;
1900 if (!ipv6_addr_equal(&addr6->sin6_addr,
1901 &srv_addr6->sin6_addr))
1903 if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id)
1909 return false; /* don't expect to be here */
1912 if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr))
1919 match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
1921 unsigned int secFlags;
1923 if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
1924 secFlags = vol->secFlg;
1926 secFlags = global_secflags | vol->secFlg;
1928 switch (server->secType) {
1930 if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT)))
1934 if (!(secFlags & CIFSSEC_MAY_NTLMV2))
1938 if (!(secFlags & CIFSSEC_MAY_NTLM))
1942 if (!(secFlags & CIFSSEC_MAY_KRB5))
1946 if (!(secFlags & CIFSSEC_MAY_NTLMSSP))
1950 /* shouldn't happen */
1954 /* now check if signing mode is acceptable */
1955 if ((secFlags & CIFSSEC_MAY_SIGN) == 0 &&
1956 (server->sec_mode & SECMODE_SIGN_REQUIRED))
1958 else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) &&
1960 (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0)
1966 static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr,
1967 struct smb_vol *vol)
1969 if ((server->vals != vol->vals) || (server->ops != vol->ops))
1972 if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns))
1975 if (!match_address(server, addr,
1976 (struct sockaddr *)&vol->srcaddr))
1979 if (!match_port(server, addr))
1982 if (!match_security(server, vol))
1988 static struct TCP_Server_Info *
1989 cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol)
1991 struct TCP_Server_Info *server;
1993 spin_lock(&cifs_tcp_ses_lock);
1994 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
1995 if (!match_server(server, addr, vol))
1998 ++server->srv_count;
1999 spin_unlock(&cifs_tcp_ses_lock);
2000 cFYI(1, "Existing tcp session with server found");
2003 spin_unlock(&cifs_tcp_ses_lock);
2008 cifs_put_tcp_session(struct TCP_Server_Info *server)
2010 struct task_struct *task;
2012 spin_lock(&cifs_tcp_ses_lock);
2013 if (--server->srv_count > 0) {
2014 spin_unlock(&cifs_tcp_ses_lock);
2018 put_net(cifs_net_ns(server));
2020 list_del_init(&server->tcp_ses_list);
2021 spin_unlock(&cifs_tcp_ses_lock);
2023 cancel_delayed_work_sync(&server->echo);
2025 spin_lock(&GlobalMid_Lock);
2026 server->tcpStatus = CifsExiting;
2027 spin_unlock(&GlobalMid_Lock);
2029 cifs_crypto_shash_release(server);
2030 cifs_fscache_release_client_cookie(server);
2032 kfree(server->session_key.response);
2033 server->session_key.response = NULL;
2034 server->session_key.len = 0;
2036 task = xchg(&server->tsk, NULL);
2038 force_sig(SIGKILL, task);
2041 static struct TCP_Server_Info *
2042 cifs_get_tcp_session(struct smb_vol *volume_info)
2044 struct TCP_Server_Info *tcp_ses = NULL;
2045 struct sockaddr_storage addr;
2046 struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
2047 struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
2050 memset(&addr, 0, sizeof(struct sockaddr_storage));
2052 cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip);
2054 if (volume_info->UNCip && volume_info->UNC) {
2055 rc = cifs_fill_sockaddr((struct sockaddr *)&addr,
2057 strlen(volume_info->UNCip),
2060 /* we failed translating address */
2064 } else if (volume_info->UNCip) {
2065 /* BB using ip addr as tcp_ses name to connect to the
2067 cERROR(1, "Connecting to DFS root not implemented yet");
2070 } else /* which tcp_sess DFS root would we conect to */ {
2071 cERROR(1, "CIFS mount error: No UNC path (e.g. -o "
2072 "unc=//192.168.1.100/public) specified");
2077 /* see if we already have a matching tcp_ses */
2078 tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info);
2082 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
2088 rc = cifs_crypto_shash_allocate(tcp_ses);
2090 cERROR(1, "could not setup hash structures rc %d", rc);
2094 tcp_ses->ops = volume_info->ops;
2095 tcp_ses->vals = volume_info->vals;
2096 cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns));
2097 tcp_ses->hostname = extract_hostname(volume_info->UNC);
2098 if (IS_ERR(tcp_ses->hostname)) {
2099 rc = PTR_ERR(tcp_ses->hostname);
2100 goto out_err_crypto_release;
2103 tcp_ses->noblocksnd = volume_info->noblocksnd;
2104 tcp_ses->noautotune = volume_info->noautotune;
2105 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
2106 tcp_ses->in_flight = 0;
2107 tcp_ses->credits = 1;
2108 init_waitqueue_head(&tcp_ses->response_q);
2109 init_waitqueue_head(&tcp_ses->request_q);
2110 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
2111 mutex_init(&tcp_ses->srv_mutex);
2112 memcpy(tcp_ses->workstation_RFC1001_name,
2113 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
2114 memcpy(tcp_ses->server_RFC1001_name,
2115 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
2116 tcp_ses->session_estab = false;
2117 tcp_ses->sequence_number = 0;
2118 tcp_ses->lstrp = jiffies;
2119 spin_lock_init(&tcp_ses->req_lock);
2120 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
2121 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
2122 INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
2125 * at this point we are the only ones with the pointer
2126 * to the struct since the kernel thread not created yet
2127 * no need to spinlock this init of tcpStatus or srv_count
2129 tcp_ses->tcpStatus = CifsNew;
2130 memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
2131 sizeof(tcp_ses->srcaddr));
2132 ++tcp_ses->srv_count;
2134 if (addr.ss_family == AF_INET6) {
2135 cFYI(1, "attempting ipv6 connect");
2136 /* BB should we allow ipv6 on port 139? */
2137 /* other OS never observed in Wild doing 139 with v6 */
2138 memcpy(&tcp_ses->dstaddr, sin_server6,
2139 sizeof(struct sockaddr_in6));
2141 memcpy(&tcp_ses->dstaddr, sin_server,
2142 sizeof(struct sockaddr_in));
2144 rc = ip_connect(tcp_ses);
2146 cERROR(1, "Error connecting to socket. Aborting operation");
2147 goto out_err_crypto_release;
2151 * since we're in a cifs function already, we know that
2152 * this will succeed. No need for try_module_get().
2154 __module_get(THIS_MODULE);
2155 tcp_ses->tsk = kthread_run(cifs_demultiplex_thread,
2157 if (IS_ERR(tcp_ses->tsk)) {
2158 rc = PTR_ERR(tcp_ses->tsk);
2159 cERROR(1, "error %d create cifsd thread", rc);
2160 module_put(THIS_MODULE);
2161 goto out_err_crypto_release;
2163 tcp_ses->tcpStatus = CifsNeedNegotiate;
2165 /* thread spawned, put it on the list */
2166 spin_lock(&cifs_tcp_ses_lock);
2167 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
2168 spin_unlock(&cifs_tcp_ses_lock);
2170 cifs_fscache_get_client_cookie(tcp_ses);
2172 /* queue echo request delayed work */
2173 queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL);
2177 out_err_crypto_release:
2178 cifs_crypto_shash_release(tcp_ses);
2180 put_net(cifs_net_ns(tcp_ses));
2184 if (!IS_ERR(tcp_ses->hostname))
2185 kfree(tcp_ses->hostname);
2186 if (tcp_ses->ssocket)
2187 sock_release(tcp_ses->ssocket);
2193 static int match_session(struct cifs_ses *ses, struct smb_vol *vol)
2195 switch (ses->server->secType) {
2197 if (vol->cred_uid != ses->cred_uid)
2201 /* NULL username means anonymous session */
2202 if (ses->user_name == NULL) {
2208 /* anything else takes username/password */
2209 if (strncmp(ses->user_name,
2210 vol->username ? vol->username : "",
2213 if (strlen(vol->username) != 0 &&
2214 ses->password != NULL &&
2215 strncmp(ses->password,
2216 vol->password ? vol->password : "",
2223 static struct cifs_ses *
2224 cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
2226 struct cifs_ses *ses;
2228 spin_lock(&cifs_tcp_ses_lock);
2229 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2230 if (!match_session(ses, vol))
2233 spin_unlock(&cifs_tcp_ses_lock);
2236 spin_unlock(&cifs_tcp_ses_lock);
2241 cifs_put_smb_ses(struct cifs_ses *ses)
2244 struct TCP_Server_Info *server = ses->server;
2246 cFYI(1, "%s: ses_count=%d", __func__, ses->ses_count);
2247 spin_lock(&cifs_tcp_ses_lock);
2248 if (--ses->ses_count > 0) {
2249 spin_unlock(&cifs_tcp_ses_lock);
2253 list_del_init(&ses->smb_ses_list);
2254 spin_unlock(&cifs_tcp_ses_lock);
2256 if (ses->status == CifsGood && server->ops->logoff) {
2258 server->ops->logoff(xid, ses);
2262 cifs_put_tcp_session(server);
2267 /* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */
2268 #define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1)
2270 /* Populate username and pw fields from keyring if possible */
2272 cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
2275 char *desc, *delim, *payload;
2278 struct TCP_Server_Info *server = ses->server;
2279 struct sockaddr_in *sa;
2280 struct sockaddr_in6 *sa6;
2281 struct user_key_payload *upayload;
2283 desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL);
2287 /* try to find an address key first */
2288 switch (server->dstaddr.ss_family) {
2290 sa = (struct sockaddr_in *)&server->dstaddr;
2291 sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr);
2294 sa6 = (struct sockaddr_in6 *)&server->dstaddr;
2295 sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr);
2298 cFYI(1, "Bad ss_family (%hu)", server->dstaddr.ss_family);
2303 cFYI(1, "%s: desc=%s", __func__, desc);
2304 key = request_key(&key_type_logon, desc, "");
2306 if (!ses->domainName) {
2307 cFYI(1, "domainName is NULL");
2312 /* didn't work, try to find a domain key */
2313 sprintf(desc, "cifs:d:%s", ses->domainName);
2314 cFYI(1, "%s: desc=%s", __func__, desc);
2315 key = request_key(&key_type_logon, desc, "");
2322 down_read(&key->sem);
2323 upayload = key->payload.data;
2324 if (IS_ERR_OR_NULL(upayload)) {
2325 rc = upayload ? PTR_ERR(upayload) : -EINVAL;
2329 /* find first : in payload */
2330 payload = (char *)upayload->data;
2331 delim = strnchr(payload, upayload->datalen, ':');
2332 cFYI(1, "payload=%s", payload);
2334 cFYI(1, "Unable to find ':' in payload (datalen=%d)",
2340 len = delim - payload;
2341 if (len > MAX_USERNAME_SIZE || len <= 0) {
2342 cFYI(1, "Bad value from username search (len=%zd)", len);
2347 vol->username = kstrndup(payload, len, GFP_KERNEL);
2348 if (!vol->username) {
2349 cFYI(1, "Unable to allocate %zd bytes for username", len);
2353 cFYI(1, "%s: username=%s", __func__, vol->username);
2355 len = key->datalen - (len + 1);
2356 if (len > MAX_PASSWORD_SIZE || len <= 0) {
2357 cFYI(1, "Bad len for password search (len=%zd)", len);
2359 kfree(vol->username);
2360 vol->username = NULL;
2365 vol->password = kstrndup(delim, len, GFP_KERNEL);
2366 if (!vol->password) {
2367 cFYI(1, "Unable to allocate %zd bytes for password", len);
2369 kfree(vol->username);
2370 vol->username = NULL;
2379 cFYI(1, "%s: returning %d", __func__, rc);
2382 #else /* ! CONFIG_KEYS */
2384 cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)),
2385 struct cifs_ses *ses __attribute__((unused)))
2389 #endif /* CONFIG_KEYS */
2391 static bool warned_on_ntlm; /* globals init to false automatically */
2393 static struct cifs_ses *
2394 cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
2398 struct cifs_ses *ses;
2399 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
2400 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
2404 ses = cifs_find_smb_ses(server, volume_info);
2406 cFYI(1, "Existing smb sess found (status=%d)", ses->status);
2408 mutex_lock(&ses->session_mutex);
2409 rc = cifs_negotiate_protocol(xid, ses);
2411 mutex_unlock(&ses->session_mutex);
2412 /* problem -- put our ses reference */
2413 cifs_put_smb_ses(ses);
2417 if (ses->need_reconnect) {
2418 cFYI(1, "Session needs reconnect");
2419 rc = cifs_setup_session(xid, ses,
2420 volume_info->local_nls);
2422 mutex_unlock(&ses->session_mutex);
2423 /* problem -- put our reference */
2424 cifs_put_smb_ses(ses);
2429 mutex_unlock(&ses->session_mutex);
2431 /* existing SMB ses has a server reference already */
2432 cifs_put_tcp_session(server);
2437 cFYI(1, "Existing smb sess not found");
2438 ses = sesInfoAlloc();
2442 /* new SMB session uses our server ref */
2443 ses->server = server;
2444 if (server->dstaddr.ss_family == AF_INET6)
2445 sprintf(ses->serverName, "%pI6", &addr6->sin6_addr);
2447 sprintf(ses->serverName, "%pI4", &addr->sin_addr);
2449 if (volume_info->username) {
2450 ses->user_name = kstrdup(volume_info->username, GFP_KERNEL);
2451 if (!ses->user_name)
2455 /* volume_info->password freed at unmount */
2456 if (volume_info->password) {
2457 ses->password = kstrdup(volume_info->password, GFP_KERNEL);
2461 if (volume_info->domainname) {
2462 ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL);
2463 if (!ses->domainName)
2466 ses->cred_uid = volume_info->cred_uid;
2467 ses->linux_uid = volume_info->linux_uid;
2469 /* ntlmv2 is much stronger than ntlm security, and has been broadly
2470 supported for many years, time to update default security mechanism */
2471 if ((volume_info->secFlg == 0) && warned_on_ntlm == false) {
2472 warned_on_ntlm = true;
2473 cERROR(1, "default security mechanism requested. The default "
2474 "security mechanism will be upgraded from ntlm to "
2475 "ntlmv2 in kernel release 3.3");
2477 ses->overrideSecFlg = volume_info->secFlg;
2479 mutex_lock(&ses->session_mutex);
2480 rc = cifs_negotiate_protocol(xid, ses);
2482 rc = cifs_setup_session(xid, ses, volume_info->local_nls);
2483 mutex_unlock(&ses->session_mutex);
2487 /* success, put it on the list */
2488 spin_lock(&cifs_tcp_ses_lock);
2489 list_add(&ses->smb_ses_list, &server->smb_ses_list);
2490 spin_unlock(&cifs_tcp_ses_lock);
2501 static int match_tcon(struct cifs_tcon *tcon, const char *unc)
2503 if (tcon->tidStatus == CifsExiting)
2505 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
2510 static struct cifs_tcon *
2511 cifs_find_tcon(struct cifs_ses *ses, const char *unc)
2513 struct list_head *tmp;
2514 struct cifs_tcon *tcon;
2516 spin_lock(&cifs_tcp_ses_lock);
2517 list_for_each(tmp, &ses->tcon_list) {
2518 tcon = list_entry(tmp, struct cifs_tcon, tcon_list);
2519 if (!match_tcon(tcon, unc))
2522 spin_unlock(&cifs_tcp_ses_lock);
2525 spin_unlock(&cifs_tcp_ses_lock);
2530 cifs_put_tcon(struct cifs_tcon *tcon)
2533 struct cifs_ses *ses = tcon->ses;
2535 cFYI(1, "%s: tc_count=%d", __func__, tcon->tc_count);
2536 spin_lock(&cifs_tcp_ses_lock);
2537 if (--tcon->tc_count > 0) {
2538 spin_unlock(&cifs_tcp_ses_lock);
2542 list_del_init(&tcon->tcon_list);
2543 spin_unlock(&cifs_tcp_ses_lock);
2546 if (ses->server->ops->tree_disconnect)
2547 ses->server->ops->tree_disconnect(xid, tcon);
2550 cifs_fscache_release_super_cookie(tcon);
2552 cifs_put_smb_ses(ses);
2555 static struct cifs_tcon *
2556 cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
2559 struct cifs_tcon *tcon;
2561 tcon = cifs_find_tcon(ses, volume_info->UNC);
2563 cFYI(1, "Found match on UNC path");
2564 /* existing tcon already has a reference */
2565 cifs_put_smb_ses(ses);
2566 if (tcon->seal != volume_info->seal)
2567 cERROR(1, "transport encryption setting "
2568 "conflicts with existing tid");
2572 if (!ses->server->ops->tree_connect) {
2577 tcon = tconInfoAlloc();
2584 if (volume_info->password) {
2585 tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
2586 if (!tcon->password) {
2592 if (strchr(volume_info->UNC + 3, '\\') == NULL
2593 && strchr(volume_info->UNC + 3, '/') == NULL) {
2594 cERROR(1, "Missing share name");
2600 * BB Do we need to wrap session_mutex around this TCon call and Unix
2601 * SetFS as we do on SessSetup and reconnect?
2604 rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon,
2605 volume_info->local_nls);
2607 cFYI(1, "Tcon rc = %d", rc);
2611 if (volume_info->nodfs) {
2612 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
2613 cFYI(1, "DFS disabled (%d)", tcon->Flags);
2615 tcon->seal = volume_info->seal;
2617 * We can have only one retry value for a connection to a share so for
2618 * resources mounted more than once to the same server share the last
2619 * value passed in for the retry flag is used.
2621 tcon->retry = volume_info->retry;
2622 tcon->nocase = volume_info->nocase;
2623 tcon->local_lease = volume_info->local_lease;
2624 INIT_LIST_HEAD(&tcon->pending_opens);
2626 spin_lock(&cifs_tcp_ses_lock);
2627 list_add(&tcon->tcon_list, &ses->tcon_list);
2628 spin_unlock(&cifs_tcp_ses_lock);
2630 cifs_fscache_get_super_cookie(tcon);
2640 cifs_put_tlink(struct tcon_link *tlink)
2642 if (!tlink || IS_ERR(tlink))
2645 if (!atomic_dec_and_test(&tlink->tl_count) ||
2646 test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) {
2647 tlink->tl_time = jiffies;
2651 if (!IS_ERR(tlink_tcon(tlink)))
2652 cifs_put_tcon(tlink_tcon(tlink));
2657 static inline struct tcon_link *
2658 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
2660 return cifs_sb->master_tlink;
2664 compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data)
2666 struct cifs_sb_info *old = CIFS_SB(sb);
2667 struct cifs_sb_info *new = mnt_data->cifs_sb;
2669 if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK))
2672 if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) !=
2673 (new->mnt_cifs_flags & CIFS_MOUNT_MASK))
2677 * We want to share sb only if we don't specify an r/wsize or
2678 * specified r/wsize is greater than or equal to existing one.
2680 if (new->wsize && new->wsize < old->wsize)
2683 if (new->rsize && new->rsize < old->rsize)
2686 if (old->mnt_uid != new->mnt_uid || old->mnt_gid != new->mnt_gid)
2689 if (old->mnt_file_mode != new->mnt_file_mode ||
2690 old->mnt_dir_mode != new->mnt_dir_mode)
2693 if (strcmp(old->local_nls->charset, new->local_nls->charset))
2696 if (old->actimeo != new->actimeo)
2703 cifs_match_super(struct super_block *sb, void *data)
2705 struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data;
2706 struct smb_vol *volume_info;
2707 struct cifs_sb_info *cifs_sb;
2708 struct TCP_Server_Info *tcp_srv;
2709 struct cifs_ses *ses;
2710 struct cifs_tcon *tcon;
2711 struct tcon_link *tlink;
2712 struct sockaddr_storage addr;
2715 memset(&addr, 0, sizeof(struct sockaddr_storage));
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 (!volume_info->UNCip || !volume_info->UNC)
2733 rc = cifs_fill_sockaddr((struct sockaddr *)&addr,
2735 strlen(volume_info->UNCip),
2740 if (!match_server(tcp_srv, (struct sockaddr *)&addr, volume_info) ||
2741 !match_session(ses, volume_info) ||
2742 !match_tcon(tcon, volume_info->UNC)) {
2747 rc = compare_mount_options(sb, mnt_data);
2749 spin_unlock(&cifs_tcp_ses_lock);
2750 cifs_put_tlink(tlink);
2755 get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path,
2756 const struct nls_table *nls_codepage, unsigned int *num_referrals,
2757 struct dfs_info3_param **referrals, int remap)
2762 if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer)
2768 if (ses->ipc_tid == 0) {
2769 temp_unc = kmalloc(2 /* for slashes */ +
2770 strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2)
2771 + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL);
2772 if (temp_unc == NULL)
2776 strcpy(temp_unc + 2, ses->serverName);
2777 strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$");
2778 rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL,
2780 cFYI(1, "Tcon rc = %d ipc_tid = %d", rc, ses->ipc_tid);
2784 rc = ses->server->ops->get_dfs_refer(xid, ses, old_path,
2785 referrals, num_referrals,
2786 nls_codepage, remap);
2788 * BB - map targetUNCs to dfs_info3 structures, here or in
2789 * ses->server->ops->get_dfs_refer.
2795 #ifdef CONFIG_DEBUG_LOCK_ALLOC
2796 static struct lock_class_key cifs_key[2];
2797 static struct lock_class_key cifs_slock_key[2];
2800 cifs_reclassify_socket4(struct socket *sock)
2802 struct sock *sk = sock->sk;
2803 BUG_ON(sock_owned_by_user(sk));
2804 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
2805 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
2809 cifs_reclassify_socket6(struct socket *sock)
2811 struct sock *sk = sock->sk;
2812 BUG_ON(sock_owned_by_user(sk));
2813 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
2814 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
2818 cifs_reclassify_socket4(struct socket *sock)
2823 cifs_reclassify_socket6(struct socket *sock)
2828 /* See RFC1001 section 14 on representation of Netbios names */
2829 static void rfc1002mangle(char *target, char *source, unsigned int length)
2833 for (i = 0, j = 0; i < (length); i++) {
2834 /* mask a nibble at a time and encode */
2835 target[j] = 'A' + (0x0F & (source[i] >> 4));
2836 target[j+1] = 'A' + (0x0F & source[i]);
2843 bind_socket(struct TCP_Server_Info *server)
2846 if (server->srcaddr.ss_family != AF_UNSPEC) {
2847 /* Bind to the specified local IP address */
2848 struct socket *socket = server->ssocket;
2849 rc = socket->ops->bind(socket,
2850 (struct sockaddr *) &server->srcaddr,
2851 sizeof(server->srcaddr));
2853 struct sockaddr_in *saddr4;
2854 struct sockaddr_in6 *saddr6;
2855 saddr4 = (struct sockaddr_in *)&server->srcaddr;
2856 saddr6 = (struct sockaddr_in6 *)&server->srcaddr;
2857 if (saddr6->sin6_family == AF_INET6)
2859 "Failed to bind to: %pI6c, error: %d",
2860 &saddr6->sin6_addr, rc);
2863 "Failed to bind to: %pI4, error: %d",
2864 &saddr4->sin_addr.s_addr, rc);
2871 ip_rfc1001_connect(struct TCP_Server_Info *server)
2875 * some servers require RFC1001 sessinit before sending
2876 * negprot - BB check reconnection in case where second
2877 * sessinit is sent but no second negprot
2879 struct rfc1002_session_packet *ses_init_buf;
2880 struct smb_hdr *smb_buf;
2881 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
2884 ses_init_buf->trailer.session_req.called_len = 32;
2886 if (server->server_RFC1001_name &&
2887 server->server_RFC1001_name[0] != 0)
2888 rfc1002mangle(ses_init_buf->trailer.
2889 session_req.called_name,
2890 server->server_RFC1001_name,
2891 RFC1001_NAME_LEN_WITH_NULL);
2893 rfc1002mangle(ses_init_buf->trailer.
2894 session_req.called_name,
2895 DEFAULT_CIFS_CALLED_NAME,
2896 RFC1001_NAME_LEN_WITH_NULL);
2898 ses_init_buf->trailer.session_req.calling_len = 32;
2901 * calling name ends in null (byte 16) from old smb
2904 if (server->workstation_RFC1001_name &&
2905 server->workstation_RFC1001_name[0] != 0)
2906 rfc1002mangle(ses_init_buf->trailer.
2907 session_req.calling_name,
2908 server->workstation_RFC1001_name,
2909 RFC1001_NAME_LEN_WITH_NULL);
2911 rfc1002mangle(ses_init_buf->trailer.
2912 session_req.calling_name,
2914 RFC1001_NAME_LEN_WITH_NULL);
2916 ses_init_buf->trailer.session_req.scope1 = 0;
2917 ses_init_buf->trailer.session_req.scope2 = 0;
2918 smb_buf = (struct smb_hdr *)ses_init_buf;
2920 /* sizeof RFC1002_SESSION_REQUEST with no scope */
2921 smb_buf->smb_buf_length = cpu_to_be32(0x81000044);
2922 rc = smb_send(server, smb_buf, 0x44);
2923 kfree(ses_init_buf);
2925 * RFC1001 layer in at least one server
2926 * requires very short break before negprot
2927 * presumably because not expecting negprot
2928 * to follow so fast. This is a simple
2929 * solution that works without
2930 * complicating the code and causes no
2931 * significant slowing down on mount
2934 usleep_range(1000, 2000);
2937 * else the negprot may still work without this
2938 * even though malloc failed
2945 generic_ip_connect(struct TCP_Server_Info *server)
2950 struct socket *socket = server->ssocket;
2951 struct sockaddr *saddr;
2953 saddr = (struct sockaddr *) &server->dstaddr;
2955 if (server->dstaddr.ss_family == AF_INET6) {
2956 sport = ((struct sockaddr_in6 *) saddr)->sin6_port;
2957 slen = sizeof(struct sockaddr_in6);
2960 sport = ((struct sockaddr_in *) saddr)->sin_port;
2961 slen = sizeof(struct sockaddr_in);
2965 if (socket == NULL) {
2966 rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM,
2967 IPPROTO_TCP, &socket, 1);
2969 cERROR(1, "Error %d creating socket", rc);
2970 server->ssocket = NULL;
2974 /* BB other socket options to set KEEPALIVE, NODELAY? */
2975 cFYI(1, "Socket created");
2976 server->ssocket = socket;
2977 socket->sk->sk_allocation = GFP_NOFS;
2978 if (sfamily == AF_INET6)
2979 cifs_reclassify_socket6(socket);
2981 cifs_reclassify_socket4(socket);
2984 rc = bind_socket(server);
2989 * Eventually check for other socket options to change from
2990 * the default. sock_setsockopt not used because it expects
2993 socket->sk->sk_rcvtimeo = 7 * HZ;
2994 socket->sk->sk_sndtimeo = 5 * HZ;
2996 /* make the bufsizes depend on wsize/rsize and max requests */
2997 if (server->noautotune) {
2998 if (socket->sk->sk_sndbuf < (200 * 1024))
2999 socket->sk->sk_sndbuf = 200 * 1024;
3000 if (socket->sk->sk_rcvbuf < (140 * 1024))
3001 socket->sk->sk_rcvbuf = 140 * 1024;
3004 if (server->tcp_nodelay) {
3006 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
3007 (char *)&val, sizeof(val));
3009 cFYI(1, "set TCP_NODELAY socket option error %d", rc);
3012 cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
3013 socket->sk->sk_sndbuf,
3014 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
3016 rc = socket->ops->connect(socket, saddr, slen, 0);
3018 cFYI(1, "Error %d connecting to server", rc);
3019 sock_release(socket);
3020 server->ssocket = NULL;
3024 if (sport == htons(RFC1001_PORT))
3025 rc = ip_rfc1001_connect(server);
3031 ip_connect(struct TCP_Server_Info *server)
3034 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
3035 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
3037 if (server->dstaddr.ss_family == AF_INET6)
3038 sport = &addr6->sin6_port;
3040 sport = &addr->sin_port;
3045 /* try with 445 port at first */
3046 *sport = htons(CIFS_PORT);
3048 rc = generic_ip_connect(server);
3052 /* if it failed, try with 139 port */
3053 *sport = htons(RFC1001_PORT);
3056 return generic_ip_connect(server);
3059 void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon,
3060 struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info)
3062 /* if we are reconnecting then should we check to see if
3063 * any requested capabilities changed locally e.g. via
3064 * remount but we can not do much about it here
3065 * if they have (even if we could detect it by the following)
3066 * Perhaps we could add a backpointer to array of sb from tcon
3067 * or if we change to make all sb to same share the same
3068 * sb as NFS - then we only have one backpointer to sb.
3069 * What if we wanted to mount the server share twice once with
3070 * and once without posixacls or posix paths? */
3071 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
3073 if (vol_info && vol_info->no_linux_ext) {
3074 tcon->fsUnixInfo.Capability = 0;
3075 tcon->unix_ext = 0; /* Unix Extensions disabled */
3076 cFYI(1, "Linux protocol extensions disabled");
3078 } else if (vol_info)
3079 tcon->unix_ext = 1; /* Unix Extensions supported */
3081 if (tcon->unix_ext == 0) {
3082 cFYI(1, "Unix extensions disabled so not set on reconnect");
3086 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
3087 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
3088 cFYI(1, "unix caps which server supports %lld", cap);
3089 /* check for reconnect case in which we do not
3090 want to change the mount behavior if we can avoid it */
3091 if (vol_info == NULL) {
3092 /* turn off POSIX ACL and PATHNAMES if not set
3093 originally at mount time */
3094 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
3095 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
3096 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
3097 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
3098 cERROR(1, "POSIXPATH support change");
3099 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
3100 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
3101 cERROR(1, "possible reconnect error");
3102 cERROR(1, "server disabled POSIX path support");
3106 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
3107 cERROR(1, "per-share encryption not supported yet");
3109 cap &= CIFS_UNIX_CAP_MASK;
3110 if (vol_info && vol_info->no_psx_acl)
3111 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
3112 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
3113 cFYI(1, "negotiated posix acl support");
3115 cifs_sb->mnt_cifs_flags |=
3116 CIFS_MOUNT_POSIXACL;
3119 if (vol_info && vol_info->posix_paths == 0)
3120 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
3121 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
3122 cFYI(1, "negotiate posix pathnames");
3124 cifs_sb->mnt_cifs_flags |=
3125 CIFS_MOUNT_POSIX_PATHS;
3128 cFYI(1, "Negotiate caps 0x%x", (int)cap);
3129 #ifdef CONFIG_CIFS_DEBUG2
3130 if (cap & CIFS_UNIX_FCNTL_CAP)
3131 cFYI(1, "FCNTL cap");
3132 if (cap & CIFS_UNIX_EXTATTR_CAP)
3133 cFYI(1, "EXTATTR cap");
3134 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
3135 cFYI(1, "POSIX path cap");
3136 if (cap & CIFS_UNIX_XATTR_CAP)
3137 cFYI(1, "XATTR cap");
3138 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
3139 cFYI(1, "POSIX ACL cap");
3140 if (cap & CIFS_UNIX_LARGE_READ_CAP)
3141 cFYI(1, "very large read cap");
3142 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
3143 cFYI(1, "very large write cap");
3144 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP)
3145 cFYI(1, "transport encryption cap");
3146 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
3147 cFYI(1, "mandatory transport encryption cap");
3148 #endif /* CIFS_DEBUG2 */
3149 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
3150 if (vol_info == NULL) {
3151 cFYI(1, "resetting capabilities failed");
3153 cERROR(1, "Negotiating Unix capabilities "
3154 "with the server failed. Consider "
3155 "mounting with the Unix Extensions "
3156 "disabled if problems are found "
3157 "by specifying the nounix mount "
3164 void cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
3165 struct cifs_sb_info *cifs_sb)
3167 INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks);
3169 spin_lock_init(&cifs_sb->tlink_tree_lock);
3170 cifs_sb->tlink_tree = RB_ROOT;
3173 * Temporarily set r/wsize for matching superblock. If we end up using
3174 * new sb then client will later negotiate it downward if needed.
3176 cifs_sb->rsize = pvolume_info->rsize;
3177 cifs_sb->wsize = pvolume_info->wsize;
3179 cifs_sb->mnt_uid = pvolume_info->linux_uid;
3180 cifs_sb->mnt_gid = pvolume_info->linux_gid;
3181 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
3182 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
3183 cFYI(1, "file mode: 0x%hx dir mode: 0x%hx",
3184 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
3186 cifs_sb->actimeo = pvolume_info->actimeo;
3187 cifs_sb->local_nls = pvolume_info->local_nls;
3189 if (pvolume_info->noperm)
3190 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
3191 if (pvolume_info->setuids)
3192 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
3193 if (pvolume_info->server_ino)
3194 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
3195 if (pvolume_info->remap)
3196 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
3197 if (pvolume_info->no_xattr)
3198 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
3199 if (pvolume_info->sfu_emul)
3200 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
3201 if (pvolume_info->nobrl)
3202 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
3203 if (pvolume_info->nostrictsync)
3204 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
3205 if (pvolume_info->mand_lock)
3206 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
3207 if (pvolume_info->rwpidforward)
3208 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
3209 if (pvolume_info->cifs_acl)
3210 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
3211 if (pvolume_info->backupuid_specified) {
3212 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID;
3213 cifs_sb->mnt_backupuid = pvolume_info->backupuid;
3215 if (pvolume_info->backupgid_specified) {
3216 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID;
3217 cifs_sb->mnt_backupgid = pvolume_info->backupgid;
3219 if (pvolume_info->override_uid)
3220 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
3221 if (pvolume_info->override_gid)
3222 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
3223 if (pvolume_info->dynperm)
3224 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
3225 if (pvolume_info->fsc)
3226 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
3227 if (pvolume_info->multiuser)
3228 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
3229 CIFS_MOUNT_NO_PERM);
3230 if (pvolume_info->strict_io)
3231 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
3232 if (pvolume_info->direct_io) {
3233 cFYI(1, "mounting share using direct i/o");
3234 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
3236 if (pvolume_info->mfsymlinks) {
3237 if (pvolume_info->sfu_emul) {
3238 cERROR(1, "mount option mfsymlinks ignored if sfu "
3239 "mount option is used");
3241 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
3245 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
3246 cERROR(1, "mount option dynperm ignored if cifsacl "
3247 "mount option supported");
3251 cleanup_volume_info_contents(struct smb_vol *volume_info)
3253 kfree(volume_info->username);
3254 kzfree(volume_info->password);
3255 if (volume_info->UNCip != volume_info->UNC + 2)
3256 kfree(volume_info->UNCip);
3257 kfree(volume_info->UNC);
3258 kfree(volume_info->domainname);
3259 kfree(volume_info->iocharset);
3260 kfree(volume_info->prepath);
3264 cifs_cleanup_volume_info(struct smb_vol *volume_info)
3268 cleanup_volume_info_contents(volume_info);
3273 #ifdef CONFIG_CIFS_DFS_UPCALL
3274 /* build_path_to_root returns full path to root when
3275 * we do not have an exiting connection (tcon) */
3277 build_unc_path_to_root(const struct smb_vol *vol,
3278 const struct cifs_sb_info *cifs_sb)
3280 char *full_path, *pos;
3281 unsigned int pplen = vol->prepath ? strlen(vol->prepath) : 0;
3282 unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1);
3284 full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL);
3285 if (full_path == NULL)
3286 return ERR_PTR(-ENOMEM);
3288 strncpy(full_path, vol->UNC, unc_len);
3289 pos = full_path + unc_len;
3292 strncpy(pos, vol->prepath, pplen);
3296 *pos = '\0'; /* add trailing null */
3297 convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
3298 cFYI(1, "%s: full_path=%s", __func__, full_path);
3303 * Perform a dfs referral query for a share and (optionally) prefix
3305 * If a referral is found, cifs_sb->mountdata will be (re-)allocated
3306 * to a string containing updated options for the submount. Otherwise it
3307 * will be left untouched.
3309 * Returns the rc from get_dfs_path to the caller, which can be used to
3310 * determine whether there were referrals.
3313 expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses,
3314 struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb,
3318 unsigned int num_referrals = 0;
3319 struct dfs_info3_param *referrals = NULL;
3320 char *full_path = NULL, *ref_path = NULL, *mdata = NULL;
3322 full_path = build_unc_path_to_root(volume_info, cifs_sb);
3323 if (IS_ERR(full_path))
3324 return PTR_ERR(full_path);
3326 /* For DFS paths, skip the first '\' of the UNC */
3327 ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1;
3329 rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls,
3330 &num_referrals, &referrals,
3331 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
3333 if (!rc && num_referrals > 0) {
3334 char *fake_devname = NULL;
3336 mdata = cifs_compose_mount_options(cifs_sb->mountdata,
3337 full_path + 1, referrals,
3340 free_dfs_info_array(referrals, num_referrals);
3342 if (IS_ERR(mdata)) {
3343 rc = PTR_ERR(mdata);
3346 cleanup_volume_info_contents(volume_info);
3347 memset(volume_info, '\0', sizeof(*volume_info));
3348 rc = cifs_setup_volume_info(volume_info, mdata,
3351 kfree(fake_devname);
3352 kfree(cifs_sb->mountdata);
3353 cifs_sb->mountdata = mdata;
3361 cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
3362 const char *devname)
3366 if (cifs_parse_mount_options(mount_data, devname, volume_info))
3370 if (volume_info->nullauth) {
3371 cFYI(1, "Anonymous login");
3372 kfree(volume_info->username);
3373 volume_info->username = NULL;
3374 } else if (volume_info->username) {
3375 /* BB fixme parse for domain name here */
3376 cFYI(1, "Username: %s", volume_info->username);
3378 cifserror("No username specified");
3379 /* In userspace mount helper we can get user name from alternate
3380 locations such as env variables and files on disk */
3384 /* this is needed for ASCII cp to Unicode converts */
3385 if (volume_info->iocharset == NULL) {
3386 /* load_nls_default cannot return null */
3387 volume_info->local_nls = load_nls_default();
3389 volume_info->local_nls = load_nls(volume_info->iocharset);
3390 if (volume_info->local_nls == NULL) {
3391 cERROR(1, "CIFS mount error: iocharset %s not found",
3392 volume_info->iocharset);
3401 cifs_get_volume_info(char *mount_data, const char *devname)
3404 struct smb_vol *volume_info;
3406 volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
3408 return ERR_PTR(-ENOMEM);
3410 rc = cifs_setup_volume_info(volume_info, mount_data, devname);
3412 cifs_cleanup_volume_info(volume_info);
3413 volume_info = ERR_PTR(rc);
3420 cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
3424 struct cifs_ses *ses;
3425 struct cifs_tcon *tcon;
3426 struct TCP_Server_Info *server;
3428 struct tcon_link *tlink;
3429 #ifdef CONFIG_CIFS_DFS_UPCALL
3430 int referral_walks_count = 0;
3433 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
3437 #ifdef CONFIG_CIFS_DFS_UPCALL
3439 /* cleanup activities if we're chasing a referral */
3440 if (referral_walks_count) {
3442 cifs_put_tcon(tcon);
3444 cifs_put_smb_ses(ses);
3458 /* get a reference to a tcp session */
3459 server = cifs_get_tcp_session(volume_info);
3460 if (IS_ERR(server)) {
3461 rc = PTR_ERR(server);
3462 bdi_destroy(&cifs_sb->bdi);
3466 /* get a reference to a SMB session */
3467 ses = cifs_get_smb_ses(server, volume_info);
3471 goto mount_fail_check;
3474 /* search for existing tcon to this server share */
3475 tcon = cifs_get_tcon(ses, volume_info);
3479 goto remote_path_check;
3482 /* tell server which Unix caps we support */
3483 if (cap_unix(tcon->ses)) {
3484 /* reset of caps checks mount to see if unix extensions
3485 disabled for just this mount */
3486 reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info);
3487 if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) &&
3488 (le64_to_cpu(tcon->fsUnixInfo.Capability) &
3489 CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) {
3491 goto mount_fail_check;
3494 tcon->unix_ext = 0; /* server does not support them */
3496 /* do not care if a following call succeed - informational */
3497 if (!tcon->ipc && server->ops->qfs_tcon)
3498 server->ops->qfs_tcon(xid, tcon);
3500 cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info);
3501 cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info);
3503 /* tune readahead according to rsize */
3504 cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE;
3507 #ifdef CONFIG_CIFS_DFS_UPCALL
3509 * Perform an unconditional check for whether there are DFS
3510 * referrals for this path without prefix, to provide support
3511 * for DFS referrals from w2k8 servers which don't seem to respond
3512 * with PATH_NOT_COVERED to requests that include the prefix.
3513 * Chase the referral if found, otherwise continue normally.
3515 if (referral_walks_count == 0) {
3516 int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb,
3519 referral_walks_count++;
3520 goto try_mount_again;
3525 /* check if a whole path is not remote */
3527 if (!server->ops->is_path_accessible) {
3529 goto mount_fail_check;
3531 /* build_path_to_root works only when we have a valid tcon */
3532 full_path = build_path_to_root(volume_info, cifs_sb, tcon);
3533 if (full_path == NULL) {
3535 goto mount_fail_check;
3537 rc = server->ops->is_path_accessible(xid, tcon, cifs_sb,
3539 if (rc != 0 && rc != -EREMOTE) {
3541 goto mount_fail_check;
3546 /* get referral if needed */
3547 if (rc == -EREMOTE) {
3548 #ifdef CONFIG_CIFS_DFS_UPCALL
3549 if (referral_walks_count > MAX_NESTED_LINKS) {
3551 * BB: when we implement proper loop detection,
3552 * we will remove this check. But now we need it
3553 * to prevent an indefinite loop if 'DFS tree' is
3554 * misconfigured (i.e. has loops).
3557 goto mount_fail_check;
3560 rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true);
3563 referral_walks_count++;
3564 goto try_mount_again;
3566 goto mount_fail_check;
3567 #else /* No DFS support, return error on mount */
3573 goto mount_fail_check;
3575 /* now, hang the tcon off of the superblock */
3576 tlink = kzalloc(sizeof *tlink, GFP_KERNEL);
3577 if (tlink == NULL) {
3579 goto mount_fail_check;
3582 tlink->tl_uid = ses->linux_uid;
3583 tlink->tl_tcon = tcon;
3584 tlink->tl_time = jiffies;
3585 set_bit(TCON_LINK_MASTER, &tlink->tl_flags);
3586 set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3588 cifs_sb->master_tlink = tlink;
3589 spin_lock(&cifs_sb->tlink_tree_lock);
3590 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
3591 spin_unlock(&cifs_sb->tlink_tree_lock);
3593 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
3597 /* on error free sesinfo and tcon struct if needed */
3599 /* If find_unc succeeded then rc == 0 so we can not end */
3600 /* up accidentally freeing someone elses tcon struct */
3602 cifs_put_tcon(tcon);
3604 cifs_put_smb_ses(ses);
3606 cifs_put_tcp_session(server);
3607 bdi_destroy(&cifs_sb->bdi);
3616 * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon
3617 * pointer may be NULL.
3620 CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
3621 const char *tree, struct cifs_tcon *tcon,
3622 const struct nls_table *nls_codepage)
3624 struct smb_hdr *smb_buffer;
3625 struct smb_hdr *smb_buffer_response;
3628 unsigned char *bcc_ptr;
3631 __u16 bytes_left, count;
3636 smb_buffer = cifs_buf_get();
3637 if (smb_buffer == NULL)
3640 smb_buffer_response = smb_buffer;
3642 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3643 NULL /*no tid */ , 4 /*wct */ );
3645 smb_buffer->Mid = get_next_mid(ses->server);
3646 smb_buffer->Uid = ses->Suid;
3647 pSMB = (TCONX_REQ *) smb_buffer;
3648 pSMBr = (TCONX_RSP *) smb_buffer_response;
3650 pSMB->AndXCommand = 0xFF;
3651 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3652 bcc_ptr = &pSMB->Password[0];
3653 if (!tcon || (ses->server->sec_mode & SECMODE_USER)) {
3654 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
3655 *bcc_ptr = 0; /* password is null byte */
3656 bcc_ptr++; /* skip password */
3657 /* already aligned so no need to do it below */
3659 pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
3660 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3661 specified as required (when that support is added to
3662 the vfs in the future) as only NTLM or the much
3663 weaker LANMAN (which we do not send by default) is accepted
3664 by Samba (not sure whether other servers allow
3665 NTLMv2 password here) */
3666 #ifdef CONFIG_CIFS_WEAK_PW_HASH
3667 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
3668 (ses->server->secType == LANMAN))
3669 calc_lanman_hash(tcon->password, ses->server->cryptkey,
3670 ses->server->sec_mode &
3671 SECMODE_PW_ENCRYPT ? true : false,
3674 #endif /* CIFS_WEAK_PW_HASH */
3675 rc = SMBNTencrypt(tcon->password, ses->server->cryptkey,
3676 bcc_ptr, nls_codepage);
3678 bcc_ptr += CIFS_AUTH_RESP_SIZE;
3679 if (ses->capabilities & CAP_UNICODE) {
3680 /* must align unicode strings */
3681 *bcc_ptr = 0; /* null byte password */
3686 if (ses->server->sec_mode &
3687 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3688 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3690 if (ses->capabilities & CAP_STATUS32) {
3691 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3693 if (ses->capabilities & CAP_DFS) {
3694 smb_buffer->Flags2 |= SMBFLG2_DFS;
3696 if (ses->capabilities & CAP_UNICODE) {
3697 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3699 cifs_strtoUTF16((__le16 *) bcc_ptr, tree,
3700 6 /* max utf8 char length in bytes */ *
3701 (/* server len*/ + 256 /* share len */), nls_codepage);
3702 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
3703 bcc_ptr += 2; /* skip trailing null */
3704 } else { /* ASCII */
3705 strcpy(bcc_ptr, tree);
3706 bcc_ptr += strlen(tree) + 1;
3708 strcpy(bcc_ptr, "?????");
3709 bcc_ptr += strlen("?????");
3711 count = bcc_ptr - &pSMB->Password[0];
3712 pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu(
3713 pSMB->hdr.smb_buf_length) + count);
3714 pSMB->ByteCount = cpu_to_le16(count);
3716 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
3719 /* above now done in SendReceive */
3720 if ((rc == 0) && (tcon != NULL)) {
3723 tcon->tidStatus = CifsGood;
3724 tcon->need_reconnect = false;
3725 tcon->tid = smb_buffer_response->Tid;
3726 bcc_ptr = pByteArea(smb_buffer_response);
3727 bytes_left = get_bcc(smb_buffer_response);
3728 length = strnlen(bcc_ptr, bytes_left - 2);
3729 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
3735 /* skip service field (NB: this field is always ASCII) */
3737 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3738 (bcc_ptr[2] == 'C')) {
3739 cFYI(1, "IPC connection");
3742 } else if (length == 2) {
3743 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3744 /* the most common case */
3745 cFYI(1, "disk share connection");
3748 bcc_ptr += length + 1;
3749 bytes_left -= (length + 1);
3750 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3752 /* mostly informational -- no need to fail on error here */
3753 kfree(tcon->nativeFileSystem);
3754 tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr,
3755 bytes_left, is_unicode,
3758 cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem);
3760 if ((smb_buffer_response->WordCount == 3) ||
3761 (smb_buffer_response->WordCount == 7))
3762 /* field is in same location */
3763 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3766 cFYI(1, "Tcon flags: 0x%x ", tcon->Flags);
3767 } else if ((rc == 0) && tcon == NULL) {
3768 /* all we need to save for IPC$ connection */
3769 ses->ipc_tid = smb_buffer_response->Tid;
3772 cifs_buf_release(smb_buffer);
3777 cifs_umount(struct cifs_sb_info *cifs_sb)
3779 struct rb_root *root = &cifs_sb->tlink_tree;
3780 struct rb_node *node;
3781 struct tcon_link *tlink;
3783 cancel_delayed_work_sync(&cifs_sb->prune_tlinks);
3785 spin_lock(&cifs_sb->tlink_tree_lock);
3786 while ((node = rb_first(root))) {
3787 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3788 cifs_get_tlink(tlink);
3789 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3790 rb_erase(node, root);
3792 spin_unlock(&cifs_sb->tlink_tree_lock);
3793 cifs_put_tlink(tlink);
3794 spin_lock(&cifs_sb->tlink_tree_lock);
3796 spin_unlock(&cifs_sb->tlink_tree_lock);
3798 bdi_destroy(&cifs_sb->bdi);
3799 kfree(cifs_sb->mountdata);
3800 unload_nls(cifs_sb->local_nls);
3805 cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses)
3808 struct TCP_Server_Info *server = ses->server;
3810 if (!server->ops->need_neg || !server->ops->negotiate)
3813 /* only send once per connect */
3814 if (!server->ops->need_neg(server))
3817 set_credits(server, 1);
3819 rc = server->ops->negotiate(xid, ses);
3821 spin_lock(&GlobalMid_Lock);
3822 if (server->tcpStatus == CifsNeedNegotiate)
3823 server->tcpStatus = CifsGood;
3826 spin_unlock(&GlobalMid_Lock);
3833 cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
3834 struct nls_table *nls_info)
3837 struct TCP_Server_Info *server = ses->server;
3840 ses->capabilities = server->capabilities;
3841 if (linuxExtEnabled == 0)
3842 ses->capabilities &= (~server->vals->cap_unix);
3844 cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3845 server->sec_mode, server->capabilities, server->timeAdj);
3847 if (server->ops->sess_setup)
3848 rc = server->ops->sess_setup(xid, ses, nls_info);
3851 cERROR(1, "Send error in SessSetup = %d", rc);
3853 mutex_lock(&ses->server->srv_mutex);
3854 if (!server->session_estab) {
3855 server->session_key.response = ses->auth_key.response;
3856 server->session_key.len = ses->auth_key.len;
3857 server->sequence_number = 0x2;
3858 server->session_estab = true;
3859 ses->auth_key.response = NULL;
3861 mutex_unlock(&server->srv_mutex);
3863 cFYI(1, "CIFS Session Established successfully");
3864 spin_lock(&GlobalMid_Lock);
3865 ses->status = CifsGood;
3866 ses->need_reconnect = false;
3867 spin_unlock(&GlobalMid_Lock);
3870 kfree(ses->auth_key.response);
3871 ses->auth_key.response = NULL;
3872 ses->auth_key.len = 0;
3873 kfree(ses->ntlmssp);
3874 ses->ntlmssp = NULL;
3880 cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses)
3882 switch (ses->server->secType) {
3884 vol->secFlg = CIFSSEC_MUST_KRB5;
3887 vol->secFlg = CIFSSEC_MUST_NTLMV2;
3890 vol->secFlg = CIFSSEC_MUST_NTLM;
3893 vol->secFlg = CIFSSEC_MUST_NTLMSSP;
3896 vol->secFlg = CIFSSEC_MUST_LANMAN;
3900 return cifs_set_cifscreds(vol, ses);
3903 static struct cifs_tcon *
3904 cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid)
3907 struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb);
3908 struct cifs_ses *ses;
3909 struct cifs_tcon *tcon = NULL;
3910 struct smb_vol *vol_info;
3912 vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL);
3913 if (vol_info == NULL)
3914 return ERR_PTR(-ENOMEM);
3916 vol_info->local_nls = cifs_sb->local_nls;
3917 vol_info->linux_uid = fsuid;
3918 vol_info->cred_uid = fsuid;
3919 vol_info->UNC = master_tcon->treeName;
3920 vol_info->retry = master_tcon->retry;
3921 vol_info->nocase = master_tcon->nocase;
3922 vol_info->local_lease = master_tcon->local_lease;
3923 vol_info->no_linux_ext = !master_tcon->unix_ext;
3925 rc = cifs_set_vol_auth(vol_info, master_tcon->ses);
3931 /* get a reference for the same TCP session */
3932 spin_lock(&cifs_tcp_ses_lock);
3933 ++master_tcon->ses->server->srv_count;
3934 spin_unlock(&cifs_tcp_ses_lock);
3936 ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info);
3938 tcon = (struct cifs_tcon *)ses;
3939 cifs_put_tcp_session(master_tcon->ses->server);
3943 tcon = cifs_get_tcon(ses, vol_info);
3945 cifs_put_smb_ses(ses);
3950 reset_cifs_unix_caps(0, tcon, NULL, vol_info);
3952 kfree(vol_info->username);
3953 kfree(vol_info->password);
3960 cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb)
3962 return tlink_tcon(cifs_sb_master_tlink(cifs_sb));
3966 cifs_sb_tcon_pending_wait(void *unused)
3969 return signal_pending(current) ? -ERESTARTSYS : 0;
3972 /* find and return a tlink with given uid */
3973 static struct tcon_link *
3974 tlink_rb_search(struct rb_root *root, uid_t uid)
3976 struct rb_node *node = root->rb_node;
3977 struct tcon_link *tlink;
3980 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3982 if (tlink->tl_uid > uid)
3983 node = node->rb_left;
3984 else if (tlink->tl_uid < uid)
3985 node = node->rb_right;
3992 /* insert a tcon_link into the tree */
3994 tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink)
3996 struct rb_node **new = &(root->rb_node), *parent = NULL;
3997 struct tcon_link *tlink;
4000 tlink = rb_entry(*new, struct tcon_link, tl_rbnode);
4003 if (tlink->tl_uid > new_tlink->tl_uid)
4004 new = &((*new)->rb_left);
4006 new = &((*new)->rb_right);
4009 rb_link_node(&new_tlink->tl_rbnode, parent, new);
4010 rb_insert_color(&new_tlink->tl_rbnode, root);
4014 * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the
4017 * If the superblock doesn't refer to a multiuser mount, then just return
4018 * the master tcon for the mount.
4020 * First, search the rbtree for an existing tcon for this fsuid. If one
4021 * exists, then check to see if it's pending construction. If it is then wait
4022 * for construction to complete. Once it's no longer pending, check to see if
4023 * it failed and either return an error or retry construction, depending on
4026 * If one doesn't exist then insert a new tcon_link struct into the tree and
4027 * try to construct a new one.
4030 cifs_sb_tlink(struct cifs_sb_info *cifs_sb)
4033 uid_t fsuid = current_fsuid();
4034 struct tcon_link *tlink, *newtlink;
4036 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER))
4037 return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
4039 spin_lock(&cifs_sb->tlink_tree_lock);
4040 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
4042 cifs_get_tlink(tlink);
4043 spin_unlock(&cifs_sb->tlink_tree_lock);
4045 if (tlink == NULL) {
4046 newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL);
4047 if (newtlink == NULL)
4048 return ERR_PTR(-ENOMEM);
4049 newtlink->tl_uid = fsuid;
4050 newtlink->tl_tcon = ERR_PTR(-EACCES);
4051 set_bit(TCON_LINK_PENDING, &newtlink->tl_flags);
4052 set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags);
4053 cifs_get_tlink(newtlink);
4055 spin_lock(&cifs_sb->tlink_tree_lock);
4056 /* was one inserted after previous search? */
4057 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
4059 cifs_get_tlink(tlink);
4060 spin_unlock(&cifs_sb->tlink_tree_lock);
4062 goto wait_for_construction;
4065 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
4066 spin_unlock(&cifs_sb->tlink_tree_lock);
4068 wait_for_construction:
4069 ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING,
4070 cifs_sb_tcon_pending_wait,
4071 TASK_INTERRUPTIBLE);
4073 cifs_put_tlink(tlink);
4074 return ERR_PTR(ret);
4077 /* if it's good, return it */
4078 if (!IS_ERR(tlink->tl_tcon))
4081 /* return error if we tried this already recently */
4082 if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) {
4083 cifs_put_tlink(tlink);
4084 return ERR_PTR(-EACCES);
4087 if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags))
4088 goto wait_for_construction;
4091 tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid);
4092 clear_bit(TCON_LINK_PENDING, &tlink->tl_flags);
4093 wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING);
4095 if (IS_ERR(tlink->tl_tcon)) {
4096 cifs_put_tlink(tlink);
4097 return ERR_PTR(-EACCES);
4104 * periodic workqueue job that scans tcon_tree for a superblock and closes
4108 cifs_prune_tlinks(struct work_struct *work)
4110 struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info,
4112 struct rb_root *root = &cifs_sb->tlink_tree;
4113 struct rb_node *node = rb_first(root);
4114 struct rb_node *tmp;
4115 struct tcon_link *tlink;
4118 * Because we drop the spinlock in the loop in order to put the tlink
4119 * it's not guarded against removal of links from the tree. The only
4120 * places that remove entries from the tree are this function and
4121 * umounts. Because this function is non-reentrant and is canceled
4122 * before umount can proceed, this is safe.
4124 spin_lock(&cifs_sb->tlink_tree_lock);
4125 node = rb_first(root);
4126 while (node != NULL) {
4128 node = rb_next(tmp);
4129 tlink = rb_entry(tmp, struct tcon_link, tl_rbnode);
4131 if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) ||
4132 atomic_read(&tlink->tl_count) != 0 ||
4133 time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies))
4136 cifs_get_tlink(tlink);
4137 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
4138 rb_erase(tmp, root);
4140 spin_unlock(&cifs_sb->tlink_tree_lock);
4141 cifs_put_tlink(tlink);
4142 spin_lock(&cifs_sb->tlink_tree_lock);
4144 spin_unlock(&cifs_sb->tlink_tree_lock);
4146 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,