Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/connect.c | |
3 | * | |
1080ef75 | 4 | * Copyright (C) International Business Machines Corp., 2002,2011 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
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. | |
11 | * | |
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. | |
16 | * | |
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 | |
fb8c4b14 | 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
1da177e4 LT |
20 | */ |
21 | #include <linux/fs.h> | |
22 | #include <linux/net.h> | |
23 | #include <linux/string.h> | |
24 | #include <linux/list.h> | |
25 | #include <linux/wait.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
1da177e4 LT |
27 | #include <linux/pagemap.h> |
28 | #include <linux/ctype.h> | |
29 | #include <linux/utsname.h> | |
30 | #include <linux/mempool.h> | |
b8643e1b | 31 | #include <linux/delay.h> |
f191401f | 32 | #include <linux/completion.h> |
aaf737ad | 33 | #include <linux/kthread.h> |
0ae0efad | 34 | #include <linux/pagevec.h> |
7dfb7103 | 35 | #include <linux/freezer.h> |
5c2503a8 | 36 | #include <linux/namei.h> |
1da177e4 LT |
37 | #include <asm/uaccess.h> |
38 | #include <asm/processor.h> | |
50b64e3b | 39 | #include <linux/inet.h> |
143cb494 | 40 | #include <linux/module.h> |
8a8798a5 | 41 | #include <keys/user-type.h> |
0e2bedaa | 42 | #include <net/ipv6.h> |
8830d7e0 SP |
43 | #include <linux/parser.h> |
44 | ||
1da177e4 LT |
45 | #include "cifspdu.h" |
46 | #include "cifsglob.h" | |
47 | #include "cifsproto.h" | |
48 | #include "cifs_unicode.h" | |
49 | #include "cifs_debug.h" | |
50 | #include "cifs_fs_sb.h" | |
51 | #include "ntlmssp.h" | |
52 | #include "nterr.h" | |
53 | #include "rfc1002pdu.h" | |
488f1d2d | 54 | #include "fscache.h" |
1da177e4 LT |
55 | |
56 | #define CIFS_PORT 445 | |
57 | #define RFC1001_PORT 139 | |
58 | ||
c74093b6 JL |
59 | /* SMB echo "timeout" -- FIXME: tunable? */ |
60 | #define SMB_ECHO_INTERVAL (60 * HZ) | |
61 | ||
1da177e4 LT |
62 | extern mempool_t *cifs_req_poolp; |
63 | ||
2de970ff | 64 | /* FIXME: should these be tunable? */ |
9d002df4 | 65 | #define TLINK_ERROR_EXPIRE (1 * HZ) |
2de970ff | 66 | #define TLINK_IDLE_EXPIRE (600 * HZ) |
9d002df4 | 67 | |
8830d7e0 SP |
68 | enum { |
69 | ||
70 | /* Mount options that take no arguments */ | |
71 | Opt_user_xattr, Opt_nouser_xattr, | |
72 | Opt_forceuid, Opt_noforceuid, | |
73 | Opt_noblocksend, Opt_noautotune, | |
74 | Opt_hard, Opt_soft, Opt_perm, Opt_noperm, | |
75 | Opt_mapchars, Opt_nomapchars, Opt_sfu, | |
76 | Opt_nosfu, Opt_nodfs, Opt_posixpaths, | |
77 | Opt_noposixpaths, Opt_nounix, | |
78 | Opt_nocase, | |
79 | Opt_brl, Opt_nobrl, | |
80 | Opt_forcemandatorylock, Opt_setuids, | |
81 | Opt_nosetuids, Opt_dynperm, Opt_nodynperm, | |
82 | Opt_nohard, Opt_nosoft, | |
83 | Opt_nointr, Opt_intr, | |
84 | Opt_nostrictsync, Opt_strictsync, | |
85 | Opt_serverino, Opt_noserverino, | |
86 | Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl, | |
87 | Opt_acl, Opt_noacl, Opt_locallease, | |
88 | Opt_sign, Opt_seal, Opt_direct, | |
89 | Opt_strictcache, Opt_noac, | |
90 | Opt_fsc, Opt_mfsymlinks, | |
d8162558 | 91 | Opt_multiuser, Opt_sloppy, |
8830d7e0 SP |
92 | |
93 | /* Mount options which take numeric value */ | |
94 | Opt_backupuid, Opt_backupgid, Opt_uid, | |
95 | Opt_cruid, Opt_gid, Opt_file_mode, | |
96 | Opt_dirmode, Opt_port, | |
97 | Opt_rsize, Opt_wsize, Opt_actimeo, | |
98 | ||
99 | /* Mount options which take string value */ | |
100 | Opt_user, Opt_pass, Opt_ip, | |
101 | Opt_unc, Opt_domain, | |
102 | Opt_srcaddr, Opt_prefixpath, | |
103 | Opt_iocharset, Opt_sockopt, | |
104 | Opt_netbiosname, Opt_servern, | |
23db65f5 | 105 | Opt_ver, Opt_vers, Opt_sec, Opt_cache, |
8830d7e0 SP |
106 | |
107 | /* Mount options to be ignored */ | |
108 | Opt_ignore, | |
109 | ||
110 | /* Options which could be blank */ | |
111 | Opt_blank_pass, | |
4fe9e963 SP |
112 | Opt_blank_user, |
113 | Opt_blank_ip, | |
8830d7e0 SP |
114 | |
115 | Opt_err | |
116 | }; | |
117 | ||
118 | static const match_table_t cifs_mount_option_tokens = { | |
119 | ||
120 | { Opt_user_xattr, "user_xattr" }, | |
121 | { Opt_nouser_xattr, "nouser_xattr" }, | |
122 | { Opt_forceuid, "forceuid" }, | |
123 | { Opt_noforceuid, "noforceuid" }, | |
124 | { Opt_noblocksend, "noblocksend" }, | |
125 | { Opt_noautotune, "noautotune" }, | |
126 | { Opt_hard, "hard" }, | |
127 | { Opt_soft, "soft" }, | |
128 | { Opt_perm, "perm" }, | |
129 | { Opt_noperm, "noperm" }, | |
130 | { Opt_mapchars, "mapchars" }, | |
131 | { Opt_nomapchars, "nomapchars" }, | |
132 | { Opt_sfu, "sfu" }, | |
133 | { Opt_nosfu, "nosfu" }, | |
134 | { Opt_nodfs, "nodfs" }, | |
135 | { Opt_posixpaths, "posixpaths" }, | |
136 | { Opt_noposixpaths, "noposixpaths" }, | |
137 | { Opt_nounix, "nounix" }, | |
138 | { Opt_nounix, "nolinux" }, | |
139 | { Opt_nocase, "nocase" }, | |
140 | { Opt_nocase, "ignorecase" }, | |
141 | { Opt_brl, "brl" }, | |
142 | { Opt_nobrl, "nobrl" }, | |
143 | { Opt_nobrl, "nolock" }, | |
144 | { Opt_forcemandatorylock, "forcemandatorylock" }, | |
5cfdddcf | 145 | { Opt_forcemandatorylock, "forcemand" }, |
8830d7e0 SP |
146 | { Opt_setuids, "setuids" }, |
147 | { Opt_nosetuids, "nosetuids" }, | |
148 | { Opt_dynperm, "dynperm" }, | |
149 | { Opt_nodynperm, "nodynperm" }, | |
150 | { Opt_nohard, "nohard" }, | |
151 | { Opt_nosoft, "nosoft" }, | |
152 | { Opt_nointr, "nointr" }, | |
153 | { Opt_intr, "intr" }, | |
154 | { Opt_nostrictsync, "nostrictsync" }, | |
155 | { Opt_strictsync, "strictsync" }, | |
156 | { Opt_serverino, "serverino" }, | |
157 | { Opt_noserverino, "noserverino" }, | |
158 | { Opt_rwpidforward, "rwpidforward" }, | |
159 | { Opt_cifsacl, "cifsacl" }, | |
160 | { Opt_nocifsacl, "nocifsacl" }, | |
161 | { Opt_acl, "acl" }, | |
162 | { Opt_noacl, "noacl" }, | |
163 | { Opt_locallease, "locallease" }, | |
164 | { Opt_sign, "sign" }, | |
165 | { Opt_seal, "seal" }, | |
166 | { Opt_direct, "direct" }, | |
531c8ff0 JL |
167 | { Opt_direct, "directio" }, |
168 | { Opt_direct, "forcedirectio" }, | |
8830d7e0 SP |
169 | { Opt_strictcache, "strictcache" }, |
170 | { Opt_noac, "noac" }, | |
171 | { Opt_fsc, "fsc" }, | |
172 | { Opt_mfsymlinks, "mfsymlinks" }, | |
173 | { Opt_multiuser, "multiuser" }, | |
d8162558 | 174 | { Opt_sloppy, "sloppy" }, |
8830d7e0 SP |
175 | |
176 | { Opt_backupuid, "backupuid=%s" }, | |
177 | { Opt_backupgid, "backupgid=%s" }, | |
178 | { Opt_uid, "uid=%s" }, | |
179 | { Opt_cruid, "cruid=%s" }, | |
180 | { Opt_gid, "gid=%s" }, | |
181 | { Opt_file_mode, "file_mode=%s" }, | |
182 | { Opt_dirmode, "dirmode=%s" }, | |
183 | { Opt_dirmode, "dir_mode=%s" }, | |
184 | { Opt_port, "port=%s" }, | |
185 | { Opt_rsize, "rsize=%s" }, | |
186 | { Opt_wsize, "wsize=%s" }, | |
187 | { Opt_actimeo, "actimeo=%s" }, | |
188 | ||
4fe9e963 SP |
189 | { Opt_blank_user, "user=" }, |
190 | { Opt_blank_user, "username=" }, | |
8830d7e0 SP |
191 | { Opt_user, "user=%s" }, |
192 | { Opt_user, "username=%s" }, | |
193 | { Opt_blank_pass, "pass=" }, | |
194 | { Opt_pass, "pass=%s" }, | |
195 | { Opt_pass, "password=%s" }, | |
4fe9e963 SP |
196 | { Opt_blank_ip, "ip=" }, |
197 | { Opt_blank_ip, "addr=" }, | |
8830d7e0 SP |
198 | { Opt_ip, "ip=%s" }, |
199 | { Opt_ip, "addr=%s" }, | |
200 | { Opt_unc, "unc=%s" }, | |
201 | { Opt_unc, "target=%s" }, | |
202 | { Opt_unc, "path=%s" }, | |
203 | { Opt_domain, "dom=%s" }, | |
204 | { Opt_domain, "domain=%s" }, | |
205 | { Opt_domain, "workgroup=%s" }, | |
206 | { Opt_srcaddr, "srcaddr=%s" }, | |
207 | { Opt_prefixpath, "prefixpath=%s" }, | |
208 | { Opt_iocharset, "iocharset=%s" }, | |
209 | { Opt_sockopt, "sockopt=%s" }, | |
210 | { Opt_netbiosname, "netbiosname=%s" }, | |
211 | { Opt_servern, "servern=%s" }, | |
212 | { Opt_ver, "ver=%s" }, | |
23db65f5 | 213 | { Opt_vers, "vers=%s" }, |
8830d7e0 | 214 | { Opt_sec, "sec=%s" }, |
15b6a473 | 215 | { Opt_cache, "cache=%s" }, |
8830d7e0 SP |
216 | |
217 | { Opt_ignore, "cred" }, | |
218 | { Opt_ignore, "credentials" }, | |
a557b976 JL |
219 | { Opt_ignore, "cred=%s" }, |
220 | { Opt_ignore, "credentials=%s" }, | |
8830d7e0 SP |
221 | { Opt_ignore, "guest" }, |
222 | { Opt_ignore, "rw" }, | |
223 | { Opt_ignore, "ro" }, | |
224 | { Opt_ignore, "suid" }, | |
225 | { Opt_ignore, "nosuid" }, | |
226 | { Opt_ignore, "exec" }, | |
227 | { Opt_ignore, "noexec" }, | |
228 | { Opt_ignore, "nodev" }, | |
229 | { Opt_ignore, "noauto" }, | |
230 | { Opt_ignore, "dev" }, | |
231 | { Opt_ignore, "mand" }, | |
232 | { Opt_ignore, "nomand" }, | |
233 | { Opt_ignore, "_netdev" }, | |
234 | ||
235 | { Opt_err, NULL } | |
236 | }; | |
237 | ||
238 | enum { | |
239 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
240 | Opt_sec_ntlmsspi, Opt_sec_ntlmssp, | |
7659624f JL |
241 | Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2, |
242 | Opt_sec_ntlmv2i, Opt_sec_lanman, | |
8830d7e0 SP |
243 | Opt_sec_none, |
244 | ||
245 | Opt_sec_err | |
246 | }; | |
247 | ||
248 | static const match_table_t cifs_secflavor_tokens = { | |
249 | { Opt_sec_krb5, "krb5" }, | |
250 | { Opt_sec_krb5i, "krb5i" }, | |
251 | { Opt_sec_krb5p, "krb5p" }, | |
252 | { Opt_sec_ntlmsspi, "ntlmsspi" }, | |
253 | { Opt_sec_ntlmssp, "ntlmssp" }, | |
254 | { Opt_ntlm, "ntlm" }, | |
255 | { Opt_sec_ntlmi, "ntlmi" }, | |
7659624f JL |
256 | { Opt_sec_ntlmv2, "nontlm" }, |
257 | { Opt_sec_ntlmv2, "ntlmv2" }, | |
8830d7e0 | 258 | { Opt_sec_ntlmv2i, "ntlmv2i" }, |
8830d7e0 SP |
259 | { Opt_sec_lanman, "lanman" }, |
260 | { Opt_sec_none, "none" }, | |
261 | ||
262 | { Opt_sec_err, NULL } | |
263 | }; | |
264 | ||
15b6a473 JL |
265 | /* cache flavors */ |
266 | enum { | |
267 | Opt_cache_loose, | |
268 | Opt_cache_strict, | |
269 | Opt_cache_none, | |
270 | Opt_cache_err | |
271 | }; | |
272 | ||
273 | static const match_table_t cifs_cacheflavor_tokens = { | |
274 | { Opt_cache_loose, "loose" }, | |
275 | { Opt_cache_strict, "strict" }, | |
276 | { Opt_cache_none, "none" }, | |
277 | { Opt_cache_err, NULL } | |
278 | }; | |
279 | ||
23db65f5 JL |
280 | static const match_table_t cifs_smb_version_tokens = { |
281 | { Smb_1, SMB1_VERSION_STRING }, | |
1080ef75 | 282 | { Smb_21, SMB21_VERSION_STRING }, |
23db65f5 JL |
283 | }; |
284 | ||
a9f1b85e PS |
285 | static int ip_connect(struct TCP_Server_Info *server); |
286 | static int generic_ip_connect(struct TCP_Server_Info *server); | |
b647c35f | 287 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
2de970ff | 288 | static void cifs_prune_tlinks(struct work_struct *work); |
b9bce2e9 JL |
289 | static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
290 | const char *devname); | |
1da177e4 | 291 | |
d5c5605c JL |
292 | /* |
293 | * cifs tcp session reconnection | |
294 | * | |
295 | * mark tcp session as reconnecting so temporarily locked | |
296 | * mark all smb sessions as reconnecting for tcp session | |
297 | * reconnect tcp session | |
298 | * wake up waiters on reconnection? - (not needed currently) | |
299 | */ | |
2cd646a2 | 300 | static int |
1da177e4 LT |
301 | cifs_reconnect(struct TCP_Server_Info *server) |
302 | { | |
303 | int rc = 0; | |
f1987b44 | 304 | struct list_head *tmp, *tmp2; |
96daf2b0 SF |
305 | struct cifs_ses *ses; |
306 | struct cifs_tcon *tcon; | |
fb8c4b14 | 307 | struct mid_q_entry *mid_entry; |
3c1105df | 308 | struct list_head retry_list; |
50c2f753 | 309 | |
1da177e4 | 310 | spin_lock(&GlobalMid_Lock); |
469ee614 | 311 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 312 | /* the demux thread will exit normally |
1da177e4 LT |
313 | next time through the loop */ |
314 | spin_unlock(&GlobalMid_Lock); | |
315 | return rc; | |
316 | } else | |
317 | server->tcpStatus = CifsNeedReconnect; | |
318 | spin_unlock(&GlobalMid_Lock); | |
319 | server->maxBuf = 0; | |
320 | ||
b6b38f70 | 321 | cFYI(1, "Reconnecting tcp session"); |
1da177e4 LT |
322 | |
323 | /* before reconnecting the tcp session, mark the smb session (uid) | |
324 | and the tid bad so they are not used until reconnected */ | |
2b84a36c | 325 | cFYI(1, "%s: marking sessions and tcons for reconnect", __func__); |
3f9bcca7 | 326 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 327 | list_for_each(tmp, &server->smb_ses_list) { |
96daf2b0 | 328 | ses = list_entry(tmp, struct cifs_ses, smb_ses_list); |
14fbf50d JL |
329 | ses->need_reconnect = true; |
330 | ses->ipc_tid = 0; | |
f1987b44 | 331 | list_for_each(tmp2, &ses->tcon_list) { |
96daf2b0 | 332 | tcon = list_entry(tmp2, struct cifs_tcon, tcon_list); |
3b795210 | 333 | tcon->need_reconnect = true; |
1da177e4 | 334 | } |
1da177e4 | 335 | } |
3f9bcca7 | 336 | spin_unlock(&cifs_tcp_ses_lock); |
2b84a36c | 337 | |
1da177e4 | 338 | /* do not want to be sending data on a socket we are freeing */ |
2b84a36c | 339 | cFYI(1, "%s: tearing down socket", __func__); |
72ca545b | 340 | mutex_lock(&server->srv_mutex); |
fb8c4b14 | 341 | if (server->ssocket) { |
b6b38f70 JP |
342 | cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state, |
343 | server->ssocket->flags); | |
91cf45f0 | 344 | kernel_sock_shutdown(server->ssocket, SHUT_WR); |
b6b38f70 | 345 | cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx", |
467a8f8d | 346 | server->ssocket->state, |
b6b38f70 | 347 | server->ssocket->flags); |
1da177e4 LT |
348 | sock_release(server->ssocket); |
349 | server->ssocket = NULL; | |
350 | } | |
5d0d2882 SP |
351 | server->sequence_number = 0; |
352 | server->session_estab = false; | |
21e73393 SP |
353 | kfree(server->session_key.response); |
354 | server->session_key.response = NULL; | |
355 | server->session_key.len = 0; | |
fda35943 | 356 | server->lstrp = jiffies; |
2b84a36c | 357 | mutex_unlock(&server->srv_mutex); |
1da177e4 | 358 | |
2b84a36c | 359 | /* mark submitted MIDs for retry and issue callback */ |
3c1105df JL |
360 | INIT_LIST_HEAD(&retry_list); |
361 | cFYI(1, "%s: moving mids to private list", __func__); | |
1da177e4 | 362 | spin_lock(&GlobalMid_Lock); |
2b84a36c JL |
363 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
364 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 PS |
365 | if (mid_entry->mid_state == MID_REQUEST_SUBMITTED) |
366 | mid_entry->mid_state = MID_RETRY_NEEDED; | |
3c1105df JL |
367 | list_move(&mid_entry->qhead, &retry_list); |
368 | } | |
369 | spin_unlock(&GlobalMid_Lock); | |
370 | ||
371 | cFYI(1, "%s: issuing mid callbacks", __func__); | |
372 | list_for_each_safe(tmp, tmp2, &retry_list) { | |
373 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
2b84a36c JL |
374 | list_del_init(&mid_entry->qhead); |
375 | mid_entry->callback(mid_entry); | |
1da177e4 | 376 | } |
1da177e4 | 377 | |
7fdbaa1b | 378 | do { |
6c3d8909 | 379 | try_to_freeze(); |
a9f1b85e PS |
380 | |
381 | /* we should try only the port we connected to before */ | |
382 | rc = generic_ip_connect(server); | |
fb8c4b14 | 383 | if (rc) { |
b6b38f70 | 384 | cFYI(1, "reconnect error %d", rc); |
0cb766ae | 385 | msleep(3000); |
1da177e4 LT |
386 | } else { |
387 | atomic_inc(&tcpSesReconnectCount); | |
388 | spin_lock(&GlobalMid_Lock); | |
469ee614 | 389 | if (server->tcpStatus != CifsExiting) |
fd88ce93 | 390 | server->tcpStatus = CifsNeedNegotiate; |
fb8c4b14 | 391 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 392 | } |
7fdbaa1b | 393 | } while (server->tcpStatus == CifsNeedReconnect); |
2b84a36c | 394 | |
1da177e4 LT |
395 | return rc; |
396 | } | |
397 | ||
c74093b6 JL |
398 | static void |
399 | cifs_echo_request(struct work_struct *work) | |
400 | { | |
401 | int rc; | |
402 | struct TCP_Server_Info *server = container_of(work, | |
403 | struct TCP_Server_Info, echo.work); | |
404 | ||
247ec9b4 | 405 | /* |
195291e6 JL |
406 | * We cannot send an echo until the NEGOTIATE_PROTOCOL request is |
407 | * done, which is indicated by maxBuf != 0. Also, no need to ping if | |
408 | * we got a response recently | |
247ec9b4 | 409 | */ |
286170aa | 410 | if (!server->ops->need_neg || server->ops->need_neg(server) || |
247ec9b4 | 411 | time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ)) |
c74093b6 JL |
412 | goto requeue_echo; |
413 | ||
414 | rc = CIFSSMBEcho(server); | |
415 | if (rc) | |
416 | cFYI(1, "Unable to send echo request to server: %s", | |
417 | server->hostname); | |
418 | ||
419 | requeue_echo: | |
da472fc8 | 420 | queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL); |
c74093b6 JL |
421 | } |
422 | ||
3d9c2472 | 423 | static bool |
2a37ef94 | 424 | allocate_buffers(struct TCP_Server_Info *server) |
3d9c2472 | 425 | { |
2a37ef94 JL |
426 | if (!server->bigbuf) { |
427 | server->bigbuf = (char *)cifs_buf_get(); | |
428 | if (!server->bigbuf) { | |
3d9c2472 PS |
429 | cERROR(1, "No memory for large SMB response"); |
430 | msleep(3000); | |
431 | /* retry will check if exiting */ | |
432 | return false; | |
433 | } | |
2a37ef94 | 434 | } else if (server->large_buf) { |
3d9c2472 | 435 | /* we are reusing a dirty large buf, clear its start */ |
1887f601 | 436 | memset(server->bigbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
437 | } |
438 | ||
2a37ef94 JL |
439 | if (!server->smallbuf) { |
440 | server->smallbuf = (char *)cifs_small_buf_get(); | |
441 | if (!server->smallbuf) { | |
3d9c2472 PS |
442 | cERROR(1, "No memory for SMB response"); |
443 | msleep(1000); | |
444 | /* retry will check if exiting */ | |
445 | return false; | |
446 | } | |
447 | /* beginning of smb buffer is cleared in our buf_get */ | |
448 | } else { | |
449 | /* if existing small buf clear beginning */ | |
1887f601 | 450 | memset(server->smallbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
451 | } |
452 | ||
3d9c2472 PS |
453 | return true; |
454 | } | |
455 | ||
ba749e6d JL |
456 | static bool |
457 | server_unresponsive(struct TCP_Server_Info *server) | |
458 | { | |
6dae51a5 PS |
459 | /* |
460 | * We need to wait 2 echo intervals to make sure we handle such | |
461 | * situations right: | |
462 | * 1s client sends a normal SMB request | |
463 | * 2s client gets a response | |
464 | * 30s echo workqueue job pops, and decides we got a response recently | |
465 | * and don't need to send another | |
466 | * ... | |
467 | * 65s kernel_recvmsg times out, and we see that we haven't gotten | |
468 | * a response in >60s. | |
469 | */ | |
470 | if (server->tcpStatus == CifsGood && | |
471 | time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) { | |
ba749e6d JL |
472 | cERROR(1, "Server %s has not responded in %d seconds. " |
473 | "Reconnecting...", server->hostname, | |
6dae51a5 | 474 | (2 * SMB_ECHO_INTERVAL) / HZ); |
ba749e6d JL |
475 | cifs_reconnect(server); |
476 | wake_up(&server->response_q); | |
477 | return true; | |
478 | } | |
479 | ||
480 | return false; | |
481 | } | |
482 | ||
42c4dfc2 JL |
483 | /* |
484 | * kvec_array_init - clone a kvec array, and advance into it | |
485 | * @new: pointer to memory for cloned array | |
486 | * @iov: pointer to original array | |
487 | * @nr_segs: number of members in original array | |
488 | * @bytes: number of bytes to advance into the cloned array | |
489 | * | |
490 | * This function will copy the array provided in iov to a section of memory | |
491 | * and advance the specified number of bytes into the new array. It returns | |
492 | * the number of segments in the new array. "new" must be at least as big as | |
493 | * the original iov array. | |
494 | */ | |
495 | static unsigned int | |
496 | kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs, | |
497 | size_t bytes) | |
498 | { | |
499 | size_t base = 0; | |
500 | ||
501 | while (bytes || !iov->iov_len) { | |
502 | int copy = min(bytes, iov->iov_len); | |
503 | ||
504 | bytes -= copy; | |
505 | base += copy; | |
506 | if (iov->iov_len == base) { | |
507 | iov++; | |
508 | nr_segs--; | |
509 | base = 0; | |
510 | } | |
511 | } | |
512 | memcpy(new, iov, sizeof(*iov) * nr_segs); | |
513 | new->iov_base += base; | |
514 | new->iov_len -= base; | |
515 | return nr_segs; | |
516 | } | |
517 | ||
1041e3f9 JL |
518 | static struct kvec * |
519 | get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs) | |
e7015fb1 | 520 | { |
1041e3f9 JL |
521 | struct kvec *new_iov; |
522 | ||
523 | if (server->iov && nr_segs <= server->nr_iov) | |
524 | return server->iov; | |
525 | ||
526 | /* not big enough -- allocate a new one and release the old */ | |
527 | new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS); | |
528 | if (new_iov) { | |
529 | kfree(server->iov); | |
530 | server->iov = new_iov; | |
531 | server->nr_iov = nr_segs; | |
532 | } | |
533 | return new_iov; | |
534 | } | |
535 | ||
e28bc5b1 JL |
536 | int |
537 | cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig, | |
538 | unsigned int nr_segs, unsigned int to_read) | |
e7015fb1 | 539 | { |
a52c1eb7 JL |
540 | int length = 0; |
541 | int total_read; | |
42c4dfc2 | 542 | unsigned int segs; |
e831e6cf | 543 | struct msghdr smb_msg; |
42c4dfc2 JL |
544 | struct kvec *iov; |
545 | ||
1041e3f9 | 546 | iov = get_server_iovec(server, nr_segs); |
42c4dfc2 JL |
547 | if (!iov) |
548 | return -ENOMEM; | |
e7015fb1 | 549 | |
e831e6cf JL |
550 | smb_msg.msg_control = NULL; |
551 | smb_msg.msg_controllen = 0; | |
552 | ||
a52c1eb7 | 553 | for (total_read = 0; to_read; total_read += length, to_read -= length) { |
95edcff4 JL |
554 | try_to_freeze(); |
555 | ||
ba749e6d | 556 | if (server_unresponsive(server)) { |
a52c1eb7 | 557 | total_read = -EAGAIN; |
ba749e6d JL |
558 | break; |
559 | } | |
560 | ||
42c4dfc2 JL |
561 | segs = kvec_array_init(iov, iov_orig, nr_segs, total_read); |
562 | ||
563 | length = kernel_recvmsg(server->ssocket, &smb_msg, | |
564 | iov, segs, to_read, 0); | |
e7015fb1 | 565 | |
e7015fb1 | 566 | if (server->tcpStatus == CifsExiting) { |
a52c1eb7 | 567 | total_read = -ESHUTDOWN; |
e7015fb1 PS |
568 | break; |
569 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
570 | cifs_reconnect(server); | |
a52c1eb7 | 571 | total_read = -EAGAIN; |
e7015fb1 PS |
572 | break; |
573 | } else if (length == -ERESTARTSYS || | |
574 | length == -EAGAIN || | |
575 | length == -EINTR) { | |
576 | /* | |
577 | * Minimum sleep to prevent looping, allowing socket | |
578 | * to clear and app threads to set tcpStatus | |
579 | * CifsNeedReconnect if server hung. | |
580 | */ | |
581 | usleep_range(1000, 2000); | |
582 | length = 0; | |
a52c1eb7 | 583 | continue; |
e7015fb1 | 584 | } else if (length <= 0) { |
a52c1eb7 JL |
585 | cFYI(1, "Received no data or error: expecting %d " |
586 | "got %d", to_read, length); | |
e7015fb1 | 587 | cifs_reconnect(server); |
a52c1eb7 | 588 | total_read = -EAGAIN; |
e7015fb1 PS |
589 | break; |
590 | } | |
591 | } | |
a52c1eb7 | 592 | return total_read; |
e7015fb1 | 593 | } |
e7015fb1 | 594 | |
e28bc5b1 JL |
595 | int |
596 | cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, | |
597 | unsigned int to_read) | |
42c4dfc2 JL |
598 | { |
599 | struct kvec iov; | |
600 | ||
601 | iov.iov_base = buf; | |
602 | iov.iov_len = to_read; | |
603 | ||
e28bc5b1 | 604 | return cifs_readv_from_socket(server, &iov, 1, to_read); |
e7015fb1 PS |
605 | } |
606 | ||
98bac62c | 607 | static bool |
fe11e4cc | 608 | is_smb_response(struct TCP_Server_Info *server, unsigned char type) |
98bac62c | 609 | { |
98bac62c PS |
610 | /* |
611 | * The first byte big endian of the length field, | |
612 | * is actually not part of the length but the type | |
613 | * with the most common, zero, as regular data. | |
614 | */ | |
fe11e4cc JL |
615 | switch (type) { |
616 | case RFC1002_SESSION_MESSAGE: | |
617 | /* Regular SMB response */ | |
618 | return true; | |
619 | case RFC1002_SESSION_KEEP_ALIVE: | |
620 | cFYI(1, "RFC 1002 session keep alive"); | |
621 | break; | |
622 | case RFC1002_POSITIVE_SESSION_RESPONSE: | |
623 | cFYI(1, "RFC 1002 positive session response"); | |
624 | break; | |
625 | case RFC1002_NEGATIVE_SESSION_RESPONSE: | |
98bac62c PS |
626 | /* |
627 | * We get this from Windows 98 instead of an error on | |
628 | * SMB negprot response. | |
629 | */ | |
fe11e4cc | 630 | cFYI(1, "RFC 1002 negative session response"); |
98bac62c PS |
631 | /* give server a second to clean up */ |
632 | msleep(1000); | |
633 | /* | |
634 | * Always try 445 first on reconnect since we get NACK | |
635 | * on some if we ever connected to port 139 (the NACK | |
636 | * is since we do not begin with RFC1001 session | |
637 | * initialize frame). | |
638 | */ | |
fe11e4cc | 639 | cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT); |
98bac62c PS |
640 | cifs_reconnect(server); |
641 | wake_up(&server->response_q); | |
fe11e4cc JL |
642 | break; |
643 | default: | |
644 | cERROR(1, "RFC 1002 unknown response type 0x%x", type); | |
98bac62c | 645 | cifs_reconnect(server); |
98bac62c PS |
646 | } |
647 | ||
fe11e4cc | 648 | return false; |
98bac62c PS |
649 | } |
650 | ||
e28bc5b1 JL |
651 | void |
652 | dequeue_mid(struct mid_q_entry *mid, bool malformed) | |
ea1f4502 | 653 | { |
ad69bae1 | 654 | #ifdef CONFIG_CIFS_STATS2 |
ea1f4502 | 655 | mid->when_received = jiffies; |
ad69bae1 | 656 | #endif |
ea1f4502 JL |
657 | spin_lock(&GlobalMid_Lock); |
658 | if (!malformed) | |
7c9421e1 | 659 | mid->mid_state = MID_RESPONSE_RECEIVED; |
ea1f4502 | 660 | else |
7c9421e1 | 661 | mid->mid_state = MID_RESPONSE_MALFORMED; |
ea1f4502 | 662 | list_del_init(&mid->qhead); |
ad69bae1 | 663 | spin_unlock(&GlobalMid_Lock); |
ea1f4502 | 664 | } |
ad69bae1 | 665 | |
c8054ebd JL |
666 | static void |
667 | handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, | |
d4e4854f | 668 | char *buf, int malformed) |
ea1f4502 | 669 | { |
316cf94a PS |
670 | if (server->ops->check_trans2 && |
671 | server->ops->check_trans2(mid, server, buf, malformed)) | |
c8054ebd | 672 | return; |
ea1f4502 | 673 | mid->resp_buf = buf; |
7c9421e1 | 674 | mid->large_buf = server->large_buf; |
2a37ef94 JL |
675 | /* Was previous buf put in mpx struct for multi-rsp? */ |
676 | if (!mid->multiRsp) { | |
677 | /* smb buffer will be freed by user thread */ | |
678 | if (server->large_buf) | |
679 | server->bigbuf = NULL; | |
680 | else | |
681 | server->smallbuf = NULL; | |
682 | } | |
ffc00e27 | 683 | dequeue_mid(mid, malformed); |
ad69bae1 PS |
684 | } |
685 | ||
762dfd10 PS |
686 | static void clean_demultiplex_info(struct TCP_Server_Info *server) |
687 | { | |
688 | int length; | |
689 | ||
690 | /* take it off the list, if it's not already */ | |
691 | spin_lock(&cifs_tcp_ses_lock); | |
692 | list_del_init(&server->tcp_ses_list); | |
693 | spin_unlock(&cifs_tcp_ses_lock); | |
694 | ||
695 | spin_lock(&GlobalMid_Lock); | |
696 | server->tcpStatus = CifsExiting; | |
697 | spin_unlock(&GlobalMid_Lock); | |
698 | wake_up_all(&server->response_q); | |
699 | ||
2d86dbc9 | 700 | /* check if we have blocked requests that need to free */ |
fc40f9cf | 701 | spin_lock(&server->req_lock); |
2d86dbc9 PS |
702 | if (server->credits <= 0) |
703 | server->credits = 1; | |
fc40f9cf | 704 | spin_unlock(&server->req_lock); |
762dfd10 PS |
705 | /* |
706 | * Although there should not be any requests blocked on this queue it | |
707 | * can not hurt to be paranoid and try to wake up requests that may | |
708 | * haven been blocked when more than 50 at time were on the wire to the | |
709 | * same server - they now will see the session is in exit state and get | |
710 | * out of SendReceive. | |
711 | */ | |
712 | wake_up_all(&server->request_q); | |
713 | /* give those requests time to exit */ | |
714 | msleep(125); | |
715 | ||
716 | if (server->ssocket) { | |
717 | sock_release(server->ssocket); | |
718 | server->ssocket = NULL; | |
719 | } | |
720 | ||
721 | if (!list_empty(&server->pending_mid_q)) { | |
722 | struct list_head dispose_list; | |
723 | struct mid_q_entry *mid_entry; | |
724 | struct list_head *tmp, *tmp2; | |
725 | ||
726 | INIT_LIST_HEAD(&dispose_list); | |
727 | spin_lock(&GlobalMid_Lock); | |
728 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { | |
729 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 PS |
730 | cFYI(1, "Clearing mid 0x%llx", mid_entry->mid); |
731 | mid_entry->mid_state = MID_SHUTDOWN; | |
762dfd10 PS |
732 | list_move(&mid_entry->qhead, &dispose_list); |
733 | } | |
734 | spin_unlock(&GlobalMid_Lock); | |
735 | ||
736 | /* now walk dispose list and issue callbacks */ | |
737 | list_for_each_safe(tmp, tmp2, &dispose_list) { | |
738 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 | 739 | cFYI(1, "Callback mid 0x%llx", mid_entry->mid); |
762dfd10 PS |
740 | list_del_init(&mid_entry->qhead); |
741 | mid_entry->callback(mid_entry); | |
742 | } | |
743 | /* 1/8th of sec is more than enough time for them to exit */ | |
744 | msleep(125); | |
745 | } | |
746 | ||
747 | if (!list_empty(&server->pending_mid_q)) { | |
748 | /* | |
749 | * mpx threads have not exited yet give them at least the smb | |
750 | * send timeout time for long ops. | |
751 | * | |
752 | * Due to delays on oplock break requests, we need to wait at | |
753 | * least 45 seconds before giving up on a request getting a | |
754 | * response and going ahead and killing cifsd. | |
755 | */ | |
756 | cFYI(1, "Wait for exit from demultiplex thread"); | |
757 | msleep(46000); | |
758 | /* | |
759 | * If threads still have not exited they are probably never | |
760 | * coming home not much else we can do but free the memory. | |
761 | */ | |
762 | } | |
763 | ||
764 | kfree(server->hostname); | |
1041e3f9 | 765 | kfree(server->iov); |
762dfd10 PS |
766 | kfree(server); |
767 | ||
768 | length = atomic_dec_return(&tcpSesAllocCount); | |
769 | if (length > 0) | |
770 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, | |
771 | GFP_KERNEL); | |
772 | } | |
773 | ||
e9097ab4 JL |
774 | static int |
775 | standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
776 | { | |
777 | int length; | |
778 | char *buf = server->smallbuf; | |
d4e4854f | 779 | unsigned int pdu_length = get_rfc1002_length(buf); |
e9097ab4 JL |
780 | |
781 | /* make sure this will fit in a large buffer */ | |
1887f601 | 782 | if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) { |
e9097ab4 JL |
783 | cERROR(1, "SMB response too long (%u bytes)", |
784 | pdu_length); | |
785 | cifs_reconnect(server); | |
786 | wake_up(&server->response_q); | |
787 | return -EAGAIN; | |
788 | } | |
789 | ||
790 | /* switch to large buffer if too big for a small one */ | |
791 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { | |
792 | server->large_buf = true; | |
d4e4854f | 793 | memcpy(server->bigbuf, buf, server->total_read); |
e9097ab4 | 794 | buf = server->bigbuf; |
e9097ab4 JL |
795 | } |
796 | ||
797 | /* now read the rest */ | |
1887f601 PS |
798 | length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, |
799 | pdu_length - HEADER_SIZE(server) + 1 + 4); | |
e9097ab4 JL |
800 | if (length < 0) |
801 | return length; | |
802 | server->total_read += length; | |
803 | ||
d4e4854f | 804 | dump_smb(buf, server->total_read); |
e9097ab4 JL |
805 | |
806 | /* | |
807 | * We know that we received enough to get to the MID as we | |
808 | * checked the pdu_length earlier. Now check to see | |
809 | * if the rest of the header is OK. We borrow the length | |
810 | * var for the rest of the loop to avoid a new stack var. | |
811 | * | |
812 | * 48 bytes is enough to display the header and a little bit | |
813 | * into the payload for debugging purposes. | |
814 | */ | |
8aa26f3e | 815 | length = server->ops->check_message(buf, server->total_read); |
e9097ab4 JL |
816 | if (length != 0) |
817 | cifs_dump_mem("Bad SMB: ", buf, | |
818 | min_t(unsigned int, server->total_read, 48)); | |
819 | ||
ff4fa4a2 JL |
820 | if (!mid) |
821 | return length; | |
e9097ab4 | 822 | |
d4e4854f | 823 | handle_mid(mid, server, buf, length); |
ff4fa4a2 | 824 | return 0; |
e9097ab4 JL |
825 | } |
826 | ||
1da177e4 | 827 | static int |
7c97c200 | 828 | cifs_demultiplex_thread(void *p) |
1da177e4 LT |
829 | { |
830 | int length; | |
7c97c200 | 831 | struct TCP_Server_Info *server = p; |
2a37ef94 JL |
832 | unsigned int pdu_length; |
833 | char *buf = NULL; | |
1da177e4 LT |
834 | struct task_struct *task_to_wake = NULL; |
835 | struct mid_q_entry *mid_entry; | |
1da177e4 | 836 | |
1da177e4 | 837 | current->flags |= PF_MEMALLOC; |
b6b38f70 | 838 | cFYI(1, "Demultiplex PID: %d", task_pid_nr(current)); |
93d0ec85 JL |
839 | |
840 | length = atomic_inc_return(&tcpSesAllocCount); | |
841 | if (length > 1) | |
26f57364 SF |
842 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, |
843 | GFP_KERNEL); | |
1da177e4 | 844 | |
83144186 | 845 | set_freezable(); |
469ee614 | 846 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
847 | if (try_to_freeze()) |
848 | continue; | |
b8643e1b | 849 | |
2a37ef94 | 850 | if (!allocate_buffers(server)) |
3d9c2472 | 851 | continue; |
b8643e1b | 852 | |
2a37ef94 | 853 | server->large_buf = false; |
2a37ef94 | 854 | buf = server->smallbuf; |
f01d5e14 | 855 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 856 | |
e28bc5b1 | 857 | length = cifs_read_from_socket(server, buf, pdu_length); |
a52c1eb7 | 858 | if (length < 0) |
1da177e4 | 859 | continue; |
2a37ef94 | 860 | server->total_read = length; |
1da177e4 | 861 | |
98bac62c PS |
862 | /* |
863 | * The right amount was read from socket - 4 bytes, | |
864 | * so we can now interpret the length field. | |
865 | */ | |
d4e4854f | 866 | pdu_length = get_rfc1002_length(buf); |
70ca734a | 867 | |
fe11e4cc JL |
868 | cFYI(1, "RFC1002 header 0x%x", pdu_length); |
869 | if (!is_smb_response(server, buf[0])) | |
fb8c4b14 | 870 | continue; |
e4eb295d | 871 | |
89482a56 | 872 | /* make sure we have enough to get to the MID */ |
1887f601 | 873 | if (pdu_length < HEADER_SIZE(server) - 1 - 4) { |
89482a56 JL |
874 | cERROR(1, "SMB response too short (%u bytes)", |
875 | pdu_length); | |
876 | cifs_reconnect(server); | |
877 | wake_up(&server->response_q); | |
878 | continue; | |
e4eb295d | 879 | } |
e7015fb1 | 880 | |
89482a56 | 881 | /* read down to the MID */ |
e28bc5b1 | 882 | length = cifs_read_from_socket(server, buf + 4, |
1887f601 | 883 | HEADER_SIZE(server) - 1 - 4); |
89482a56 | 884 | if (length < 0) |
e4eb295d | 885 | continue; |
2a37ef94 | 886 | server->total_read += length; |
1da177e4 | 887 | |
8aa26f3e | 888 | mid_entry = server->ops->find_mid(server, buf); |
50c2f753 | 889 | |
44d22d84 JL |
890 | if (!mid_entry || !mid_entry->receive) |
891 | length = standard_receive3(server, mid_entry); | |
892 | else | |
893 | length = mid_entry->receive(server, mid_entry); | |
71823baf | 894 | |
e9097ab4 | 895 | if (length < 0) |
fe11e4cc | 896 | continue; |
1da177e4 | 897 | |
d4e4854f | 898 | if (server->large_buf) |
2a37ef94 | 899 | buf = server->bigbuf; |
fda35943 | 900 | |
fda35943 | 901 | server->lstrp = jiffies; |
2b84a36c | 902 | if (mid_entry != NULL) { |
2a37ef94 JL |
903 | if (!mid_entry->multiRsp || mid_entry->multiEnd) |
904 | mid_entry->callback(mid_entry); | |
7f0adb53 PS |
905 | } else if (!server->ops->is_oplock_break || |
906 | !server->ops->is_oplock_break(buf, server)) { | |
b6b38f70 | 907 | cERROR(1, "No task to wake, unknown frame received! " |
8097531a | 908 | "NumMids %d", atomic_read(&midCount)); |
1887f601 PS |
909 | cifs_dump_mem("Received Data is: ", buf, |
910 | HEADER_SIZE(server)); | |
3979877e | 911 | #ifdef CONFIG_CIFS_DEBUG2 |
7f0adb53 PS |
912 | if (server->ops->dump_detail) |
913 | server->ops->dump_detail(buf); | |
3979877e SF |
914 | cifs_dump_mids(server); |
915 | #endif /* CIFS_DEBUG2 */ | |
50c2f753 | 916 | |
e4eb295d SF |
917 | } |
918 | } /* end while !EXITING */ | |
919 | ||
fd62cb7e | 920 | /* buffer usually freed in free_mid - need to free it here on exit */ |
2a37ef94 JL |
921 | cifs_buf_release(server->bigbuf); |
922 | if (server->smallbuf) /* no sense logging a debug message if NULL */ | |
923 | cifs_small_buf_release(server->smallbuf); | |
1da177e4 | 924 | |
b1c8d2b4 | 925 | task_to_wake = xchg(&server->tsk, NULL); |
762dfd10 | 926 | clean_demultiplex_info(server); |
50c2f753 | 927 | |
b1c8d2b4 JL |
928 | /* if server->tsk was NULL then wait for a signal before exiting */ |
929 | if (!task_to_wake) { | |
930 | set_current_state(TASK_INTERRUPTIBLE); | |
931 | while (!signal_pending(current)) { | |
932 | schedule(); | |
933 | set_current_state(TASK_INTERRUPTIBLE); | |
934 | } | |
935 | set_current_state(TASK_RUNNING); | |
936 | } | |
937 | ||
0468a2cf | 938 | module_put_and_exit(0); |
1da177e4 LT |
939 | } |
940 | ||
c359cf3c JL |
941 | /* extract the host portion of the UNC string */ |
942 | static char * | |
943 | extract_hostname(const char *unc) | |
944 | { | |
945 | const char *src; | |
946 | char *dst, *delim; | |
947 | unsigned int len; | |
948 | ||
949 | /* skip double chars at beginning of string */ | |
950 | /* BB: check validity of these bytes? */ | |
951 | src = unc + 2; | |
952 | ||
953 | /* delimiter between hostname and sharename is always '\\' now */ | |
954 | delim = strchr(src, '\\'); | |
955 | if (!delim) | |
956 | return ERR_PTR(-EINVAL); | |
957 | ||
958 | len = delim - src; | |
959 | dst = kmalloc((len + 1), GFP_KERNEL); | |
960 | if (dst == NULL) | |
961 | return ERR_PTR(-ENOMEM); | |
962 | ||
963 | memcpy(dst, src, len); | |
964 | dst[len] = '\0'; | |
965 | ||
966 | return dst; | |
967 | } | |
968 | ||
8830d7e0 SP |
969 | static int get_option_ul(substring_t args[], unsigned long *option) |
970 | { | |
971 | int rc; | |
972 | char *string; | |
973 | ||
974 | string = match_strdup(args); | |
975 | if (string == NULL) | |
976 | return -ENOMEM; | |
bfa890a3 | 977 | rc = kstrtoul(string, 0, option); |
8830d7e0 SP |
978 | kfree(string); |
979 | ||
980 | return rc; | |
981 | } | |
982 | ||
983 | ||
984 | static int cifs_parse_security_flavors(char *value, | |
985 | struct smb_vol *vol) | |
986 | { | |
987 | ||
988 | substring_t args[MAX_OPT_ARGS]; | |
989 | ||
990 | switch (match_token(value, cifs_secflavor_tokens, args)) { | |
991 | case Opt_sec_krb5: | |
992 | vol->secFlg |= CIFSSEC_MAY_KRB5; | |
993 | break; | |
994 | case Opt_sec_krb5i: | |
995 | vol->secFlg |= CIFSSEC_MAY_KRB5 | CIFSSEC_MUST_SIGN; | |
996 | break; | |
997 | case Opt_sec_krb5p: | |
998 | /* vol->secFlg |= CIFSSEC_MUST_SEAL | CIFSSEC_MAY_KRB5; */ | |
999 | cERROR(1, "Krb5 cifs privacy not supported"); | |
1000 | break; | |
1001 | case Opt_sec_ntlmssp: | |
1002 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP; | |
1003 | break; | |
1004 | case Opt_sec_ntlmsspi: | |
1005 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP | CIFSSEC_MUST_SIGN; | |
1006 | break; | |
1007 | case Opt_ntlm: | |
1008 | /* ntlm is default so can be turned off too */ | |
1009 | vol->secFlg |= CIFSSEC_MAY_NTLM; | |
1010 | break; | |
1011 | case Opt_sec_ntlmi: | |
1012 | vol->secFlg |= CIFSSEC_MAY_NTLM | CIFSSEC_MUST_SIGN; | |
1013 | break; | |
7659624f | 1014 | case Opt_sec_ntlmv2: |
8830d7e0 SP |
1015 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
1016 | break; | |
1017 | case Opt_sec_ntlmv2i: | |
1018 | vol->secFlg |= CIFSSEC_MAY_NTLMV2 | CIFSSEC_MUST_SIGN; | |
1019 | break; | |
1020 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
1021 | case Opt_sec_lanman: | |
1022 | vol->secFlg |= CIFSSEC_MAY_LANMAN; | |
1023 | break; | |
1024 | #endif | |
1025 | case Opt_sec_none: | |
1026 | vol->nullauth = 1; | |
1027 | break; | |
1028 | default: | |
1029 | cERROR(1, "bad security option: %s", value); | |
1030 | return 1; | |
1031 | } | |
1032 | ||
1033 | return 0; | |
1034 | } | |
1035 | ||
15b6a473 JL |
1036 | static int |
1037 | cifs_parse_cache_flavor(char *value, struct smb_vol *vol) | |
1038 | { | |
1039 | substring_t args[MAX_OPT_ARGS]; | |
1040 | ||
1041 | switch (match_token(value, cifs_cacheflavor_tokens, args)) { | |
1042 | case Opt_cache_loose: | |
1043 | vol->direct_io = false; | |
1044 | vol->strict_io = false; | |
1045 | break; | |
1046 | case Opt_cache_strict: | |
1047 | vol->direct_io = false; | |
1048 | vol->strict_io = true; | |
1049 | break; | |
1050 | case Opt_cache_none: | |
1051 | vol->direct_io = true; | |
1052 | vol->strict_io = false; | |
1053 | break; | |
1054 | default: | |
1055 | cERROR(1, "bad cache= option: %s", value); | |
1056 | return 1; | |
1057 | } | |
1058 | return 0; | |
1059 | } | |
1060 | ||
23db65f5 JL |
1061 | static int |
1062 | cifs_parse_smb_version(char *value, struct smb_vol *vol) | |
1063 | { | |
1064 | substring_t args[MAX_OPT_ARGS]; | |
1065 | ||
1066 | switch (match_token(value, cifs_smb_version_tokens, args)) { | |
1067 | case Smb_1: | |
1068 | vol->ops = &smb1_operations; | |
1069 | vol->vals = &smb1_values; | |
1070 | break; | |
1080ef75 SF |
1071 | #ifdef CONFIG_CIFS_SMB2 |
1072 | case Smb_21: | |
1073 | vol->ops = &smb21_operations; | |
1074 | vol->vals = &smb21_values; | |
1075 | break; | |
1076 | #endif | |
23db65f5 JL |
1077 | default: |
1078 | cERROR(1, "Unknown vers= option specified: %s", value); | |
1079 | return 1; | |
1080 | } | |
1081 | return 0; | |
1082 | } | |
1083 | ||
1da177e4 | 1084 | static int |
b946845a | 1085 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
50c2f753 | 1086 | struct smb_vol *vol) |
1da177e4 | 1087 | { |
8830d7e0 | 1088 | char *data, *end; |
957df453 | 1089 | char *mountdata_copy = NULL, *options; |
1da177e4 LT |
1090 | unsigned int temp_len, i, j; |
1091 | char separator[2]; | |
9b9d6b24 JL |
1092 | short int override_uid = -1; |
1093 | short int override_gid = -1; | |
1094 | bool uid_specified = false; | |
1095 | bool gid_specified = false; | |
d8162558 JL |
1096 | bool sloppy = false; |
1097 | char *invalid = NULL; | |
88463999 | 1098 | char *nodename = utsname()->nodename; |
8830d7e0 SP |
1099 | char *string = NULL; |
1100 | char *tmp_end, *value; | |
1101 | char delim; | |
296838b1 JL |
1102 | bool cache_specified = false; |
1103 | static bool cache_warned = false; | |
1da177e4 LT |
1104 | |
1105 | separator[0] = ','; | |
50c2f753 | 1106 | separator[1] = 0; |
8830d7e0 | 1107 | delim = separator[0]; |
1da177e4 | 1108 | |
88463999 JL |
1109 | /* |
1110 | * does not have to be perfect mapping since field is | |
1111 | * informational, only used for servers that do not support | |
1112 | * port 445 and it can be overridden at mount time | |
1113 | */ | |
1397f2ee JL |
1114 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
1115 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
1116 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
1117 | ||
1397f2ee | 1118 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
1119 | /* null target name indicates to use *SMBSERVR default called name |
1120 | if we end up sending RFC1001 session initialize */ | |
1121 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
1122 | vol->cred_uid = current_uid(); |
1123 | vol->linux_uid = current_uid(); | |
a001e5b5 | 1124 | vol->linux_gid = current_gid(); |
f55ed1a8 JL |
1125 | |
1126 | /* default to only allowing write access to owner of the mount */ | |
1127 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
1128 | |
1129 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
1130 | /* default is always to request posix paths. */ |
1131 | vol->posix_paths = 1; | |
a0c9217f JL |
1132 | /* default to using server inode numbers where available */ |
1133 | vol->server_ino = 1; | |
ac67055e | 1134 | |
6d20e840 SJ |
1135 | vol->actimeo = CIFS_DEF_ACTIMEO; |
1136 | ||
23db65f5 JL |
1137 | /* FIXME: add autonegotiation -- for now, SMB1 is default */ |
1138 | vol->ops = &smb1_operations; | |
1139 | vol->vals = &smb1_values; | |
1140 | ||
b946845a SF |
1141 | if (!mountdata) |
1142 | goto cifs_parse_mount_err; | |
1143 | ||
1144 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); | |
1145 | if (!mountdata_copy) | |
1146 | goto cifs_parse_mount_err; | |
1da177e4 | 1147 | |
b946845a | 1148 | options = mountdata_copy; |
4906e50b | 1149 | end = options + strlen(options); |
8830d7e0 | 1150 | |
50c2f753 | 1151 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 1152 | if (options[4] != 0) { |
1da177e4 LT |
1153 | separator[0] = options[4]; |
1154 | options += 5; | |
1155 | } else { | |
b6b38f70 | 1156 | cFYI(1, "Null separator not allowed"); |
1da177e4 LT |
1157 | } |
1158 | } | |
3d3ea8e6 SP |
1159 | vol->backupuid_specified = false; /* no backup intent for a user */ |
1160 | vol->backupgid_specified = false; /* no backup intent for a group */ | |
50c2f753 | 1161 | |
1da177e4 | 1162 | while ((data = strsep(&options, separator)) != NULL) { |
8830d7e0 SP |
1163 | substring_t args[MAX_OPT_ARGS]; |
1164 | unsigned long option; | |
1165 | int token; | |
1166 | ||
1da177e4 LT |
1167 | if (!*data) |
1168 | continue; | |
1da177e4 | 1169 | |
8830d7e0 SP |
1170 | token = match_token(data, cifs_mount_option_tokens, args); |
1171 | ||
1172 | switch (token) { | |
1173 | ||
1174 | /* Ingnore the following */ | |
1175 | case Opt_ignore: | |
1176 | break; | |
1177 | ||
1178 | /* Boolean values */ | |
1179 | case Opt_user_xattr: | |
1da177e4 | 1180 | vol->no_xattr = 0; |
8830d7e0 SP |
1181 | break; |
1182 | case Opt_nouser_xattr: | |
1da177e4 | 1183 | vol->no_xattr = 1; |
8830d7e0 SP |
1184 | break; |
1185 | case Opt_forceuid: | |
9b9d6b24 | 1186 | override_uid = 1; |
8830d7e0 SP |
1187 | break; |
1188 | case Opt_noforceuid: | |
9b9d6b24 | 1189 | override_uid = 0; |
8830d7e0 SP |
1190 | break; |
1191 | case Opt_noblocksend: | |
edf1ae40 | 1192 | vol->noblocksnd = 1; |
8830d7e0 SP |
1193 | break; |
1194 | case Opt_noautotune: | |
edf1ae40 | 1195 | vol->noautotune = 1; |
8830d7e0 SP |
1196 | break; |
1197 | case Opt_hard: | |
1da177e4 | 1198 | vol->retry = 1; |
8830d7e0 SP |
1199 | break; |
1200 | case Opt_soft: | |
1da177e4 | 1201 | vol->retry = 0; |
8830d7e0 SP |
1202 | break; |
1203 | case Opt_perm: | |
1da177e4 | 1204 | vol->noperm = 0; |
8830d7e0 SP |
1205 | break; |
1206 | case Opt_noperm: | |
1da177e4 | 1207 | vol->noperm = 1; |
8830d7e0 SP |
1208 | break; |
1209 | case Opt_mapchars: | |
6a0b4824 | 1210 | vol->remap = 1; |
8830d7e0 SP |
1211 | break; |
1212 | case Opt_nomapchars: | |
6a0b4824 | 1213 | vol->remap = 0; |
8830d7e0 SP |
1214 | break; |
1215 | case Opt_sfu: | |
50c2f753 | 1216 | vol->sfu_emul = 1; |
8830d7e0 SP |
1217 | break; |
1218 | case Opt_nosfu: | |
50c2f753 | 1219 | vol->sfu_emul = 0; |
8830d7e0 SP |
1220 | break; |
1221 | case Opt_nodfs: | |
2c1b8615 | 1222 | vol->nodfs = 1; |
8830d7e0 SP |
1223 | break; |
1224 | case Opt_posixpaths: | |
ac67055e | 1225 | vol->posix_paths = 1; |
8830d7e0 SP |
1226 | break; |
1227 | case Opt_noposixpaths: | |
ac67055e | 1228 | vol->posix_paths = 0; |
8830d7e0 SP |
1229 | break; |
1230 | case Opt_nounix: | |
c18c842b | 1231 | vol->no_linux_ext = 1; |
8830d7e0 SP |
1232 | break; |
1233 | case Opt_nocase: | |
50c2f753 | 1234 | vol->nocase = 1; |
8830d7e0 SP |
1235 | break; |
1236 | case Opt_brl: | |
c46fa8ac | 1237 | vol->nobrl = 0; |
8830d7e0 SP |
1238 | break; |
1239 | case Opt_nobrl: | |
c46fa8ac | 1240 | vol->nobrl = 1; |
5cfdddcf PS |
1241 | /* |
1242 | * turn off mandatory locking in mode | |
8830d7e0 | 1243 | * if remote locking is turned off since the |
5cfdddcf PS |
1244 | * local vfs will do advisory |
1245 | */ | |
50c2f753 SF |
1246 | if (vol->file_mode == |
1247 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1248 | vol->file_mode = S_IALLUGO; |
8830d7e0 SP |
1249 | break; |
1250 | case Opt_forcemandatorylock: | |
13a6e42a | 1251 | vol->mand_lock = 1; |
8830d7e0 SP |
1252 | break; |
1253 | case Opt_setuids: | |
1da177e4 | 1254 | vol->setuids = 1; |
8830d7e0 SP |
1255 | break; |
1256 | case Opt_nosetuids: | |
1da177e4 | 1257 | vol->setuids = 0; |
8830d7e0 SP |
1258 | break; |
1259 | case Opt_dynperm: | |
d0a9c078 | 1260 | vol->dynperm = true; |
8830d7e0 SP |
1261 | break; |
1262 | case Opt_nodynperm: | |
d0a9c078 | 1263 | vol->dynperm = false; |
8830d7e0 SP |
1264 | break; |
1265 | case Opt_nohard: | |
1da177e4 | 1266 | vol->retry = 0; |
8830d7e0 SP |
1267 | break; |
1268 | case Opt_nosoft: | |
1da177e4 | 1269 | vol->retry = 1; |
8830d7e0 SP |
1270 | break; |
1271 | case Opt_nointr: | |
1da177e4 | 1272 | vol->intr = 0; |
8830d7e0 SP |
1273 | break; |
1274 | case Opt_intr: | |
1da177e4 | 1275 | vol->intr = 1; |
8830d7e0 SP |
1276 | break; |
1277 | case Opt_nostrictsync: | |
be652445 | 1278 | vol->nostrictsync = 1; |
8830d7e0 SP |
1279 | break; |
1280 | case Opt_strictsync: | |
be652445 | 1281 | vol->nostrictsync = 0; |
8830d7e0 SP |
1282 | break; |
1283 | case Opt_serverino: | |
1da177e4 | 1284 | vol->server_ino = 1; |
8830d7e0 SP |
1285 | break; |
1286 | case Opt_noserverino: | |
1da177e4 | 1287 | vol->server_ino = 0; |
8830d7e0 SP |
1288 | break; |
1289 | case Opt_rwpidforward: | |
d4ffff1f | 1290 | vol->rwpidforward = 1; |
8830d7e0 SP |
1291 | break; |
1292 | case Opt_cifsacl: | |
0a4b92c0 | 1293 | vol->cifs_acl = 1; |
8830d7e0 SP |
1294 | break; |
1295 | case Opt_nocifsacl: | |
0a4b92c0 | 1296 | vol->cifs_acl = 0; |
8830d7e0 SP |
1297 | break; |
1298 | case Opt_acl: | |
1da177e4 | 1299 | vol->no_psx_acl = 0; |
8830d7e0 SP |
1300 | break; |
1301 | case Opt_noacl: | |
1da177e4 | 1302 | vol->no_psx_acl = 1; |
8830d7e0 SP |
1303 | break; |
1304 | case Opt_locallease: | |
84210e91 | 1305 | vol->local_lease = 1; |
8830d7e0 SP |
1306 | break; |
1307 | case Opt_sign: | |
750d1151 | 1308 | vol->secFlg |= CIFSSEC_MUST_SIGN; |
8830d7e0 SP |
1309 | break; |
1310 | case Opt_seal: | |
95b1cb90 | 1311 | /* we do not do the following in secFlags because seal |
8830d7e0 SP |
1312 | * is a per tree connection (mount) not a per socket |
1313 | * or per-smb connection option in the protocol | |
1314 | * vol->secFlg |= CIFSSEC_MUST_SEAL; | |
1315 | */ | |
95b1cb90 | 1316 | vol->seal = 1; |
8830d7e0 SP |
1317 | break; |
1318 | case Opt_direct: | |
296838b1 | 1319 | cache_specified = true; |
15b6a473 JL |
1320 | vol->direct_io = true; |
1321 | vol->strict_io = false; | |
09983b2f JL |
1322 | cERROR(1, "The \"directio\" option will be removed in " |
1323 | "3.7. Please switch to the \"cache=none\" " | |
1324 | "option."); | |
8830d7e0 SP |
1325 | break; |
1326 | case Opt_strictcache: | |
296838b1 | 1327 | cache_specified = true; |
15b6a473 JL |
1328 | vol->direct_io = false; |
1329 | vol->strict_io = true; | |
09983b2f JL |
1330 | cERROR(1, "The \"strictcache\" option will be removed " |
1331 | "in 3.7. Please switch to the \"cache=strict\" " | |
1332 | "option."); | |
8830d7e0 SP |
1333 | break; |
1334 | case Opt_noac: | |
50c2f753 SF |
1335 | printk(KERN_WARNING "CIFS: Mount option noac not " |
1336 | "supported. Instead set " | |
1337 | "/proc/fs/cifs/LookupCacheEnabled to 0\n"); | |
8830d7e0 SP |
1338 | break; |
1339 | case Opt_fsc: | |
607a569d | 1340 | #ifndef CONFIG_CIFS_FSCACHE |
83fb086e | 1341 | cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE " |
607a569d | 1342 | "kernel config option set"); |
b946845a | 1343 | goto cifs_parse_mount_err; |
607a569d | 1344 | #endif |
fa1df75d | 1345 | vol->fsc = true; |
8830d7e0 SP |
1346 | break; |
1347 | case Opt_mfsymlinks: | |
736a3320 | 1348 | vol->mfsymlinks = true; |
8830d7e0 SP |
1349 | break; |
1350 | case Opt_multiuser: | |
0eb8a132 | 1351 | vol->multiuser = true; |
8830d7e0 | 1352 | break; |
d8162558 JL |
1353 | case Opt_sloppy: |
1354 | sloppy = true; | |
1355 | break; | |
8830d7e0 SP |
1356 | |
1357 | /* Numeric Values */ | |
1358 | case Opt_backupuid: | |
1359 | if (get_option_ul(args, &option)) { | |
3d3ea8e6 SP |
1360 | cERROR(1, "%s: Invalid backupuid value", |
1361 | __func__); | |
1362 | goto cifs_parse_mount_err; | |
1363 | } | |
8830d7e0 | 1364 | vol->backupuid = option; |
3d3ea8e6 | 1365 | vol->backupuid_specified = true; |
8830d7e0 SP |
1366 | break; |
1367 | case Opt_backupgid: | |
1368 | if (get_option_ul(args, &option)) { | |
3d3ea8e6 SP |
1369 | cERROR(1, "%s: Invalid backupgid value", |
1370 | __func__); | |
1371 | goto cifs_parse_mount_err; | |
1372 | } | |
8830d7e0 | 1373 | vol->backupgid = option; |
3d3ea8e6 | 1374 | vol->backupgid_specified = true; |
8830d7e0 SP |
1375 | break; |
1376 | case Opt_uid: | |
1377 | if (get_option_ul(args, &option)) { | |
1378 | cERROR(1, "%s: Invalid uid value", | |
1379 | __func__); | |
1380 | goto cifs_parse_mount_err; | |
1381 | } | |
1382 | vol->linux_uid = option; | |
1383 | uid_specified = true; | |
1384 | break; | |
1385 | case Opt_cruid: | |
1386 | if (get_option_ul(args, &option)) { | |
1387 | cERROR(1, "%s: Invalid cruid value", | |
1388 | __func__); | |
1389 | goto cifs_parse_mount_err; | |
1390 | } | |
1391 | vol->cred_uid = option; | |
1392 | break; | |
1393 | case Opt_gid: | |
1394 | if (get_option_ul(args, &option)) { | |
1395 | cERROR(1, "%s: Invalid gid value", | |
1396 | __func__); | |
1397 | goto cifs_parse_mount_err; | |
1398 | } | |
1399 | vol->linux_gid = option; | |
1400 | gid_specified = true; | |
1401 | break; | |
1402 | case Opt_file_mode: | |
1403 | if (get_option_ul(args, &option)) { | |
1404 | cERROR(1, "%s: Invalid file_mode value", | |
1405 | __func__); | |
1406 | goto cifs_parse_mount_err; | |
1407 | } | |
1408 | vol->file_mode = option; | |
1409 | break; | |
1410 | case Opt_dirmode: | |
1411 | if (get_option_ul(args, &option)) { | |
1412 | cERROR(1, "%s: Invalid dir_mode value", | |
1413 | __func__); | |
1414 | goto cifs_parse_mount_err; | |
1415 | } | |
1416 | vol->dir_mode = option; | |
1417 | break; | |
1418 | case Opt_port: | |
1419 | if (get_option_ul(args, &option)) { | |
1420 | cERROR(1, "%s: Invalid port value", | |
1421 | __func__); | |
1422 | goto cifs_parse_mount_err; | |
1423 | } | |
1424 | vol->port = option; | |
1425 | break; | |
1426 | case Opt_rsize: | |
1427 | if (get_option_ul(args, &option)) { | |
1428 | cERROR(1, "%s: Invalid rsize value", | |
1429 | __func__); | |
b946845a | 1430 | goto cifs_parse_mount_err; |
8830d7e0 SP |
1431 | } |
1432 | vol->rsize = option; | |
1433 | break; | |
1434 | case Opt_wsize: | |
1435 | if (get_option_ul(args, &option)) { | |
1436 | cERROR(1, "%s: Invalid wsize value", | |
1437 | __func__); | |
1438 | goto cifs_parse_mount_err; | |
1439 | } | |
1440 | vol->wsize = option; | |
1441 | break; | |
1442 | case Opt_actimeo: | |
1443 | if (get_option_ul(args, &option)) { | |
1444 | cERROR(1, "%s: Invalid actimeo value", | |
1445 | __func__); | |
1446 | goto cifs_parse_mount_err; | |
1447 | } | |
1448 | vol->actimeo = HZ * option; | |
1449 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
1450 | cERROR(1, "CIFS: attribute cache" | |
1451 | "timeout too large"); | |
1452 | goto cifs_parse_mount_err; | |
1453 | } | |
1454 | break; | |
1455 | ||
1456 | /* String Arguments */ | |
1457 | ||
4fe9e963 SP |
1458 | case Opt_blank_user: |
1459 | /* null user, ie. anonymous authentication */ | |
1460 | vol->nullauth = 1; | |
1461 | vol->username = NULL; | |
1462 | break; | |
8830d7e0 SP |
1463 | case Opt_user: |
1464 | string = match_strdup(args); | |
1465 | if (string == NULL) | |
1466 | goto out_nomem; | |
1467 | ||
4fe9e963 | 1468 | if (strnlen(string, MAX_USERNAME_SIZE) > |
8830d7e0 SP |
1469 | MAX_USERNAME_SIZE) { |
1470 | printk(KERN_WARNING "CIFS: username too long\n"); | |
1471 | goto cifs_parse_mount_err; | |
1472 | } | |
1473 | vol->username = kstrdup(string, GFP_KERNEL); | |
1474 | if (!vol->username) { | |
1475 | printk(KERN_WARNING "CIFS: no memory " | |
1476 | "for username\n"); | |
1477 | goto cifs_parse_mount_err; | |
1478 | } | |
1479 | break; | |
1480 | case Opt_blank_pass: | |
1481 | vol->password = NULL; | |
1482 | break; | |
1483 | case Opt_pass: | |
1484 | /* passwords have to be handled differently | |
1485 | * to allow the character used for deliminator | |
1486 | * to be passed within them | |
1487 | */ | |
1488 | ||
1489 | /* Obtain the value string */ | |
1490 | value = strchr(data, '='); | |
10238074 | 1491 | value++; |
8830d7e0 SP |
1492 | |
1493 | /* Set tmp_end to end of the string */ | |
1494 | tmp_end = (char *) value + strlen(value); | |
1495 | ||
1496 | /* Check if following character is the deliminator | |
1497 | * If yes, we have encountered a double deliminator | |
1498 | * reset the NULL character to the deliminator | |
1499 | */ | |
e73f843a | 1500 | if (tmp_end < end && tmp_end[1] == delim) { |
8830d7e0 SP |
1501 | tmp_end[0] = delim; |
1502 | ||
e73f843a SJ |
1503 | /* Keep iterating until we get to a single |
1504 | * deliminator OR the end | |
1505 | */ | |
1506 | while ((tmp_end = strchr(tmp_end, delim)) | |
1507 | != NULL && (tmp_end[1] == delim)) { | |
1508 | tmp_end = (char *) &tmp_end[2]; | |
1509 | } | |
1510 | ||
1511 | /* Reset var options to point to next element */ | |
1512 | if (tmp_end) { | |
1513 | tmp_end[0] = '\0'; | |
1514 | options = (char *) &tmp_end[1]; | |
1515 | } else | |
1516 | /* Reached the end of the mount option | |
1517 | * string */ | |
1518 | options = end; | |
8830d7e0 SP |
1519 | } |
1520 | ||
8830d7e0 SP |
1521 | /* Now build new password string */ |
1522 | temp_len = strlen(value); | |
1523 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); | |
1524 | if (vol->password == NULL) { | |
1525 | printk(KERN_WARNING "CIFS: no memory " | |
1526 | "for password\n"); | |
1527 | goto cifs_parse_mount_err; | |
1528 | } | |
1529 | ||
1530 | for (i = 0, j = 0; i < temp_len; i++, j++) { | |
1531 | vol->password[j] = value[i]; | |
1532 | if ((value[i] == delim) && | |
1533 | value[i+1] == delim) | |
1534 | /* skip the second deliminator */ | |
1535 | i++; | |
1536 | } | |
1537 | vol->password[j] = '\0'; | |
1538 | break; | |
4fe9e963 SP |
1539 | case Opt_blank_ip: |
1540 | vol->UNCip = NULL; | |
1541 | break; | |
8830d7e0 SP |
1542 | case Opt_ip: |
1543 | string = match_strdup(args); | |
1544 | if (string == NULL) | |
1545 | goto out_nomem; | |
1546 | ||
4fe9e963 | 1547 | if (strnlen(string, INET6_ADDRSTRLEN) > |
8830d7e0 SP |
1548 | INET6_ADDRSTRLEN) { |
1549 | printk(KERN_WARNING "CIFS: ip address " | |
1550 | "too long\n"); | |
1551 | goto cifs_parse_mount_err; | |
1552 | } | |
1553 | vol->UNCip = kstrdup(string, GFP_KERNEL); | |
1554 | if (!vol->UNCip) { | |
1555 | printk(KERN_WARNING "CIFS: no memory " | |
1556 | "for UNC IP\n"); | |
1557 | goto cifs_parse_mount_err; | |
1558 | } | |
1559 | break; | |
1560 | case Opt_unc: | |
1561 | string = match_strdup(args); | |
1562 | if (string == NULL) | |
1563 | goto out_nomem; | |
1564 | ||
8830d7e0 SP |
1565 | temp_len = strnlen(string, 300); |
1566 | if (temp_len == 300) { | |
1567 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
1568 | goto cifs_parse_mount_err; | |
1569 | } | |
1570 | ||
e4b41fb9 SP |
1571 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
1572 | if (vol->UNC == NULL) { | |
1573 | printk(KERN_WARNING "CIFS: no memory for UNC\n"); | |
1574 | goto cifs_parse_mount_err; | |
1575 | } | |
1576 | strcpy(vol->UNC, string); | |
1577 | ||
8830d7e0 | 1578 | if (strncmp(string, "//", 2) == 0) { |
1da177e4 LT |
1579 | vol->UNC[0] = '\\'; |
1580 | vol->UNC[1] = '\\'; | |
8830d7e0 | 1581 | } else if (strncmp(string, "\\\\", 2) != 0) { |
50c2f753 | 1582 | printk(KERN_WARNING "CIFS: UNC Path does not " |
8830d7e0 | 1583 | "begin with // or \\\\\n"); |
b946845a | 1584 | goto cifs_parse_mount_err; |
1da177e4 | 1585 | } |
8830d7e0 | 1586 | |
8830d7e0 SP |
1587 | break; |
1588 | case Opt_domain: | |
1589 | string = match_strdup(args); | |
1590 | if (string == NULL) | |
1591 | goto out_nomem; | |
1592 | ||
4fe9e963 | 1593 | if (strnlen(string, 256) == 256) { |
8830d7e0 SP |
1594 | printk(KERN_WARNING "CIFS: domain name too" |
1595 | " long\n"); | |
1596 | goto cifs_parse_mount_err; | |
1597 | } | |
1598 | ||
1599 | vol->domainname = kstrdup(string, GFP_KERNEL); | |
1600 | if (!vol->domainname) { | |
1601 | printk(KERN_WARNING "CIFS: no memory " | |
1602 | "for domainname\n"); | |
1603 | goto cifs_parse_mount_err; | |
1604 | } | |
1605 | cFYI(1, "Domain name set"); | |
1606 | break; | |
1607 | case Opt_srcaddr: | |
1608 | string = match_strdup(args); | |
1609 | if (string == NULL) | |
1610 | goto out_nomem; | |
1611 | ||
4fe9e963 | 1612 | if (!cifs_convert_address( |
8830d7e0 SP |
1613 | (struct sockaddr *)&vol->srcaddr, |
1614 | string, strlen(string))) { | |
1615 | printk(KERN_WARNING "CIFS: Could not parse" | |
1616 | " srcaddr: %s\n", string); | |
1617 | goto cifs_parse_mount_err; | |
1618 | } | |
1619 | break; | |
1620 | case Opt_prefixpath: | |
1621 | string = match_strdup(args); | |
1622 | if (string == NULL) | |
1623 | goto out_nomem; | |
1624 | ||
8830d7e0 SP |
1625 | temp_len = strnlen(string, 1024); |
1626 | if (string[0] != '/') | |
1627 | temp_len++; /* missing leading slash */ | |
1628 | if (temp_len > 1024) { | |
1629 | printk(KERN_WARNING "CIFS: prefix too long\n"); | |
1630 | goto cifs_parse_mount_err; | |
1631 | } | |
1632 | ||
1633 | vol->prepath = kmalloc(temp_len+1, GFP_KERNEL); | |
1634 | if (vol->prepath == NULL) { | |
1635 | printk(KERN_WARNING "CIFS: no memory " | |
1636 | "for path prefix\n"); | |
1637 | goto cifs_parse_mount_err; | |
1638 | } | |
1639 | ||
1640 | if (string[0] != '/') { | |
1641 | vol->prepath[0] = '/'; | |
1642 | strcpy(vol->prepath+1, string); | |
1643 | } else | |
1644 | strcpy(vol->prepath, string); | |
1645 | ||
1646 | break; | |
1647 | case Opt_iocharset: | |
1648 | string = match_strdup(args); | |
1649 | if (string == NULL) | |
1650 | goto out_nomem; | |
1651 | ||
4fe9e963 | 1652 | if (strnlen(string, 1024) >= 65) { |
8830d7e0 SP |
1653 | printk(KERN_WARNING "CIFS: iocharset name " |
1654 | "too long.\n"); | |
1655 | goto cifs_parse_mount_err; | |
1656 | } | |
1657 | ||
1658 | if (strnicmp(string, "default", 7) != 0) { | |
1659 | vol->iocharset = kstrdup(string, | |
1660 | GFP_KERNEL); | |
1661 | if (!vol->iocharset) { | |
1662 | printk(KERN_WARNING "CIFS: no memory" | |
1663 | "for charset\n"); | |
1664 | goto cifs_parse_mount_err; | |
1665 | } | |
1666 | } | |
1667 | /* if iocharset not set then load_nls_default | |
1668 | * is used by caller | |
1669 | */ | |
1670 | cFYI(1, "iocharset set to %s", string); | |
1671 | break; | |
1672 | case Opt_sockopt: | |
1673 | string = match_strdup(args); | |
1674 | if (string == NULL) | |
1675 | goto out_nomem; | |
1676 | ||
8830d7e0 SP |
1677 | if (strnicmp(string, "TCP_NODELAY", 11) == 0) |
1678 | vol->sockopt_tcp_nodelay = 1; | |
1679 | break; | |
1680 | case Opt_netbiosname: | |
1681 | string = match_strdup(args); | |
1682 | if (string == NULL) | |
1683 | goto out_nomem; | |
1684 | ||
8830d7e0 SP |
1685 | memset(vol->source_rfc1001_name, 0x20, |
1686 | RFC1001_NAME_LEN); | |
1687 | /* | |
1688 | * FIXME: are there cases in which a comma can | |
1689 | * be valid in workstation netbios name (and | |
1690 | * need special handling)? | |
1691 | */ | |
1692 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
1693 | /* don't ucase netbiosname for user */ | |
1694 | if (string[i] == 0) | |
1695 | break; | |
1696 | vol->source_rfc1001_name[i] = string[i]; | |
1697 | } | |
1698 | /* The string has 16th byte zero still from | |
1699 | * set at top of the function | |
1700 | */ | |
1701 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
1702 | printk(KERN_WARNING "CIFS: netbiosname" | |
1703 | " longer than 15 truncated.\n"); | |
1704 | ||
1705 | break; | |
1706 | case Opt_servern: | |
1707 | /* servernetbiosname specified override *SMBSERVER */ | |
1708 | string = match_strdup(args); | |
1709 | if (string == NULL) | |
1710 | goto out_nomem; | |
1711 | ||
8830d7e0 SP |
1712 | /* last byte, type, is 0x20 for servr type */ |
1713 | memset(vol->target_rfc1001_name, 0x20, | |
1714 | RFC1001_NAME_LEN_WITH_NULL); | |
1715 | ||
1716 | /* BB are there cases in which a comma can be | |
1717 | valid in this workstation netbios name | |
1718 | (and need special handling)? */ | |
1719 | ||
1720 | /* user or mount helper must uppercase the | |
1721 | netbios name */ | |
1722 | for (i = 0; i < 15; i++) { | |
1723 | if (string[i] == 0) | |
1724 | break; | |
1725 | vol->target_rfc1001_name[i] = string[i]; | |
1726 | } | |
1727 | /* The string has 16th byte zero still from | |
1728 | set at top of the function */ | |
1729 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
1730 | printk(KERN_WARNING "CIFS: server net" | |
1731 | "biosname longer than 15 truncated.\n"); | |
1732 | break; | |
1733 | case Opt_ver: | |
1734 | string = match_strdup(args); | |
1735 | if (string == NULL) | |
1736 | goto out_nomem; | |
1737 | ||
5249af32 | 1738 | if (strnicmp(string, "1", 1) == 0) { |
8830d7e0 SP |
1739 | /* This is the default */ |
1740 | break; | |
1741 | } | |
1742 | /* For all other value, error */ | |
1743 | printk(KERN_WARNING "CIFS: Invalid version" | |
1744 | " specified\n"); | |
b946845a | 1745 | goto cifs_parse_mount_err; |
23db65f5 JL |
1746 | case Opt_vers: |
1747 | string = match_strdup(args); | |
1748 | if (string == NULL) | |
1749 | goto out_nomem; | |
1750 | ||
1751 | if (cifs_parse_smb_version(string, vol) != 0) | |
1752 | goto cifs_parse_mount_err; | |
1753 | break; | |
8830d7e0 SP |
1754 | case Opt_sec: |
1755 | string = match_strdup(args); | |
1756 | if (string == NULL) | |
1757 | goto out_nomem; | |
1758 | ||
8830d7e0 SP |
1759 | if (cifs_parse_security_flavors(string, vol) != 0) |
1760 | goto cifs_parse_mount_err; | |
1761 | break; | |
15b6a473 | 1762 | case Opt_cache: |
296838b1 | 1763 | cache_specified = true; |
15b6a473 JL |
1764 | string = match_strdup(args); |
1765 | if (string == NULL) | |
1766 | goto out_nomem; | |
1767 | ||
1768 | if (cifs_parse_cache_flavor(string, vol) != 0) | |
1769 | goto cifs_parse_mount_err; | |
1770 | break; | |
8830d7e0 | 1771 | default: |
d8162558 JL |
1772 | /* |
1773 | * An option we don't recognize. Save it off for later | |
1774 | * if we haven't already found one | |
1775 | */ | |
1776 | if (!invalid) | |
1777 | invalid = data; | |
8830d7e0 | 1778 | break; |
1da177e4 | 1779 | } |
8830d7e0 SP |
1780 | /* Free up any allocated string */ |
1781 | kfree(string); | |
1782 | string = NULL; | |
1da177e4 | 1783 | } |
0eb8a132 | 1784 | |
d8162558 JL |
1785 | if (!sloppy && invalid) { |
1786 | printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid); | |
1787 | goto cifs_parse_mount_err; | |
1788 | } | |
1789 | ||
8a8798a5 JL |
1790 | #ifndef CONFIG_KEYS |
1791 | /* Muliuser mounts require CONFIG_KEYS support */ | |
1792 | if (vol->multiuser) { | |
1793 | cERROR(1, "Multiuser mounts require kernels with " | |
1794 | "CONFIG_KEYS enabled."); | |
b946845a | 1795 | goto cifs_parse_mount_err; |
0eb8a132 | 1796 | } |
8a8798a5 | 1797 | #endif |
0eb8a132 | 1798 | |
fb8c4b14 | 1799 | if (vol->UNCip == NULL) |
1da177e4 LT |
1800 | vol->UNCip = &vol->UNC[2]; |
1801 | ||
9b9d6b24 JL |
1802 | if (uid_specified) |
1803 | vol->override_uid = override_uid; | |
1804 | else if (override_uid == 1) | |
1805 | printk(KERN_NOTICE "CIFS: ignoring forceuid mount option " | |
1806 | "specified with no uid= option.\n"); | |
1807 | ||
1808 | if (gid_specified) | |
1809 | vol->override_gid = override_gid; | |
1810 | else if (override_gid == 1) | |
1811 | printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " | |
1812 | "specified with no gid= option.\n"); | |
1813 | ||
296838b1 JL |
1814 | /* FIXME: remove this block in 3.7 */ |
1815 | if (!cache_specified && !cache_warned) { | |
1816 | cache_warned = true; | |
1817 | printk(KERN_NOTICE "CIFS: no cache= option specified, using " | |
1818 | "\"cache=loose\". This default will change " | |
1819 | "to \"cache=strict\" in 3.7.\n"); | |
1820 | } | |
1821 | ||
b946845a | 1822 | kfree(mountdata_copy); |
1da177e4 | 1823 | return 0; |
b946845a | 1824 | |
8830d7e0 SP |
1825 | out_nomem: |
1826 | printk(KERN_WARNING "Could not allocate temporary buffer\n"); | |
b946845a | 1827 | cifs_parse_mount_err: |
8830d7e0 | 1828 | kfree(string); |
b946845a SF |
1829 | kfree(mountdata_copy); |
1830 | return 1; | |
1da177e4 LT |
1831 | } |
1832 | ||
3eb9a889 BG |
1833 | /** Returns true if srcaddr isn't specified and rhs isn't |
1834 | * specified, or if srcaddr is specified and | |
1835 | * matches the IP address of the rhs argument. | |
1836 | */ | |
1837 | static bool | |
1838 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
1839 | { | |
1840 | switch (srcaddr->sa_family) { | |
1841 | case AF_UNSPEC: | |
1842 | return (rhs->sa_family == AF_UNSPEC); | |
1843 | case AF_INET: { | |
1844 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
1845 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
1846 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
1847 | } | |
1848 | case AF_INET6: { | |
1849 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
1850 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs; | |
1851 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); | |
1852 | } | |
1853 | default: | |
1854 | WARN_ON(1); | |
1855 | return false; /* don't expect to be here */ | |
1856 | } | |
1857 | } | |
1858 | ||
4b886136 PS |
1859 | /* |
1860 | * If no port is specified in addr structure, we try to match with 445 port | |
1861 | * and if it fails - with 139 ports. It should be called only if address | |
1862 | * families of server and addr are equal. | |
1863 | */ | |
1864 | static bool | |
1865 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
1866 | { | |
6da97910 | 1867 | __be16 port, *sport; |
4b886136 PS |
1868 | |
1869 | switch (addr->sa_family) { | |
1870 | case AF_INET: | |
1871 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
1872 | port = ((struct sockaddr_in *) addr)->sin_port; | |
1873 | break; | |
1874 | case AF_INET6: | |
1875 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
1876 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
1877 | break; | |
1878 | default: | |
1879 | WARN_ON(1); | |
1880 | return false; | |
1881 | } | |
1882 | ||
1883 | if (!port) { | |
1884 | port = htons(CIFS_PORT); | |
1885 | if (port == *sport) | |
1886 | return true; | |
1887 | ||
1888 | port = htons(RFC1001_PORT); | |
1889 | } | |
1890 | ||
1891 | return port == *sport; | |
1892 | } | |
3eb9a889 | 1893 | |
4515148e | 1894 | static bool |
3eb9a889 BG |
1895 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
1896 | struct sockaddr *srcaddr) | |
4515148e | 1897 | { |
4515148e | 1898 | switch (addr->sa_family) { |
a9f1b85e PS |
1899 | case AF_INET: { |
1900 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
1901 | struct sockaddr_in *srv_addr4 = | |
1902 | (struct sockaddr_in *)&server->dstaddr; | |
1903 | ||
1904 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 1905 | return false; |
4515148e | 1906 | break; |
a9f1b85e PS |
1907 | } |
1908 | case AF_INET6: { | |
1909 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
1910 | struct sockaddr_in6 *srv_addr6 = | |
1911 | (struct sockaddr_in6 *)&server->dstaddr; | |
1912 | ||
4515148e | 1913 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 1914 | &srv_addr6->sin6_addr)) |
4515148e | 1915 | return false; |
a9f1b85e | 1916 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 1917 | return false; |
4515148e JL |
1918 | break; |
1919 | } | |
a9f1b85e PS |
1920 | default: |
1921 | WARN_ON(1); | |
1922 | return false; /* don't expect to be here */ | |
1923 | } | |
4515148e | 1924 | |
3eb9a889 BG |
1925 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
1926 | return false; | |
1927 | ||
4515148e JL |
1928 | return true; |
1929 | } | |
1930 | ||
daf5b0b6 JL |
1931 | static bool |
1932 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
1933 | { | |
1934 | unsigned int secFlags; | |
1935 | ||
1936 | if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
1937 | secFlags = vol->secFlg; | |
1938 | else | |
1939 | secFlags = global_secflags | vol->secFlg; | |
1940 | ||
1941 | switch (server->secType) { | |
1942 | case LANMAN: | |
1943 | if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT))) | |
1944 | return false; | |
1945 | break; | |
1946 | case NTLMv2: | |
1947 | if (!(secFlags & CIFSSEC_MAY_NTLMV2)) | |
1948 | return false; | |
1949 | break; | |
1950 | case NTLM: | |
1951 | if (!(secFlags & CIFSSEC_MAY_NTLM)) | |
1952 | return false; | |
1953 | break; | |
1954 | case Kerberos: | |
1955 | if (!(secFlags & CIFSSEC_MAY_KRB5)) | |
1956 | return false; | |
1957 | break; | |
1958 | case RawNTLMSSP: | |
1959 | if (!(secFlags & CIFSSEC_MAY_NTLMSSP)) | |
1960 | return false; | |
1961 | break; | |
1962 | default: | |
1963 | /* shouldn't happen */ | |
1964 | return false; | |
1965 | } | |
1966 | ||
25985edc | 1967 | /* now check if signing mode is acceptable */ |
daf5b0b6 | 1968 | if ((secFlags & CIFSSEC_MAY_SIGN) == 0 && |
96daf2b0 | 1969 | (server->sec_mode & SECMODE_SIGN_REQUIRED)) |
daf5b0b6 JL |
1970 | return false; |
1971 | else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) && | |
96daf2b0 | 1972 | (server->sec_mode & |
daf5b0b6 JL |
1973 | (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0) |
1974 | return false; | |
1975 | ||
1976 | return true; | |
1977 | } | |
1978 | ||
37bb04e5 PS |
1979 | static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr, |
1980 | struct smb_vol *vol) | |
1981 | { | |
23db65f5 JL |
1982 | if ((server->vals != vol->vals) || (server->ops != vol->ops)) |
1983 | return 0; | |
1984 | ||
37bb04e5 PS |
1985 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) |
1986 | return 0; | |
1987 | ||
1988 | if (!match_address(server, addr, | |
1989 | (struct sockaddr *)&vol->srcaddr)) | |
1990 | return 0; | |
1991 | ||
1992 | if (!match_port(server, addr)) | |
1993 | return 0; | |
1994 | ||
1995 | if (!match_security(server, vol)) | |
1996 | return 0; | |
1997 | ||
1998 | return 1; | |
1999 | } | |
2000 | ||
e7ddee90 | 2001 | static struct TCP_Server_Info * |
daf5b0b6 | 2002 | cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol) |
1da177e4 | 2003 | { |
e7ddee90 | 2004 | struct TCP_Server_Info *server; |
e7ddee90 | 2005 | |
3f9bcca7 | 2006 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 2007 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
37bb04e5 | 2008 | if (!match_server(server, addr, vol)) |
daf5b0b6 JL |
2009 | continue; |
2010 | ||
e7ddee90 | 2011 | ++server->srv_count; |
3f9bcca7 | 2012 | spin_unlock(&cifs_tcp_ses_lock); |
b6b38f70 | 2013 | cFYI(1, "Existing tcp session with server found"); |
e7ddee90 | 2014 | return server; |
1da177e4 | 2015 | } |
3f9bcca7 | 2016 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2017 | return NULL; |
2018 | } | |
1b20d672 | 2019 | |
14fbf50d | 2020 | static void |
e7ddee90 | 2021 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
1da177e4 | 2022 | { |
e7ddee90 | 2023 | struct task_struct *task; |
1b20d672 | 2024 | |
3f9bcca7 | 2025 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 2026 | if (--server->srv_count > 0) { |
3f9bcca7 | 2027 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 2028 | return; |
1da177e4 | 2029 | } |
1b20d672 | 2030 | |
f1d0c998 RL |
2031 | put_net(cifs_net_ns(server)); |
2032 | ||
e7ddee90 | 2033 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 2034 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2035 | |
c74093b6 JL |
2036 | cancel_delayed_work_sync(&server->echo); |
2037 | ||
e7ddee90 JL |
2038 | spin_lock(&GlobalMid_Lock); |
2039 | server->tcpStatus = CifsExiting; | |
2040 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 2041 | |
d2b91521 | 2042 | cifs_crypto_shash_release(server); |
488f1d2d SJ |
2043 | cifs_fscache_release_client_cookie(server); |
2044 | ||
21e73393 SP |
2045 | kfree(server->session_key.response); |
2046 | server->session_key.response = NULL; | |
2047 | server->session_key.len = 0; | |
2048 | ||
e7ddee90 JL |
2049 | task = xchg(&server->tsk, NULL); |
2050 | if (task) | |
2051 | force_sig(SIGKILL, task); | |
1da177e4 LT |
2052 | } |
2053 | ||
63c038c2 JL |
2054 | static struct TCP_Server_Info * |
2055 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
2056 | { | |
2057 | struct TCP_Server_Info *tcp_ses = NULL; | |
a9ac49d3 | 2058 | struct sockaddr_storage addr; |
63c038c2 JL |
2059 | struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr; |
2060 | struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr; | |
2061 | int rc; | |
2062 | ||
a9ac49d3 | 2063 | memset(&addr, 0, sizeof(struct sockaddr_storage)); |
63c038c2 | 2064 | |
b6b38f70 | 2065 | cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip); |
63c038c2 | 2066 | |
1e68b2b2 | 2067 | if (volume_info->UNCip && volume_info->UNC) { |
50d97160 JL |
2068 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, |
2069 | volume_info->UNCip, | |
67b7626a | 2070 | strlen(volume_info->UNCip), |
50d97160 | 2071 | volume_info->port); |
1e68b2b2 | 2072 | if (!rc) { |
63c038c2 JL |
2073 | /* we failed translating address */ |
2074 | rc = -EINVAL; | |
2075 | goto out_err; | |
2076 | } | |
63c038c2 JL |
2077 | } else if (volume_info->UNCip) { |
2078 | /* BB using ip addr as tcp_ses name to connect to the | |
2079 | DFS root below */ | |
b6b38f70 | 2080 | cERROR(1, "Connecting to DFS root not implemented yet"); |
63c038c2 JL |
2081 | rc = -EINVAL; |
2082 | goto out_err; | |
2083 | } else /* which tcp_sess DFS root would we conect to */ { | |
b6b38f70 JP |
2084 | cERROR(1, "CIFS mount error: No UNC path (e.g. -o " |
2085 | "unc=//192.168.1.100/public) specified"); | |
63c038c2 JL |
2086 | rc = -EINVAL; |
2087 | goto out_err; | |
2088 | } | |
2089 | ||
2090 | /* see if we already have a matching tcp_ses */ | |
daf5b0b6 | 2091 | tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info); |
63c038c2 JL |
2092 | if (tcp_ses) |
2093 | return tcp_ses; | |
2094 | ||
2095 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
2096 | if (!tcp_ses) { | |
2097 | rc = -ENOMEM; | |
2098 | goto out_err; | |
2099 | } | |
2100 | ||
d2b91521 SP |
2101 | rc = cifs_crypto_shash_allocate(tcp_ses); |
2102 | if (rc) { | |
2103 | cERROR(1, "could not setup hash structures rc %d", rc); | |
2104 | goto out_err; | |
2105 | } | |
2106 | ||
23db65f5 JL |
2107 | tcp_ses->ops = volume_info->ops; |
2108 | tcp_ses->vals = volume_info->vals; | |
f1d0c998 | 2109 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
2110 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
2111 | if (IS_ERR(tcp_ses->hostname)) { | |
2112 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 2113 | goto out_err_crypto_release; |
63c038c2 JL |
2114 | } |
2115 | ||
2116 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
2117 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 2118 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
fc40f9cf | 2119 | tcp_ses->in_flight = 0; |
2d86dbc9 | 2120 | tcp_ses->credits = 1; |
63c038c2 JL |
2121 | init_waitqueue_head(&tcp_ses->response_q); |
2122 | init_waitqueue_head(&tcp_ses->request_q); | |
2123 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
2124 | mutex_init(&tcp_ses->srv_mutex); | |
2125 | memcpy(tcp_ses->workstation_RFC1001_name, | |
2126 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
2127 | memcpy(tcp_ses->server_RFC1001_name, | |
2128 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 2129 | tcp_ses->session_estab = false; |
63c038c2 | 2130 | tcp_ses->sequence_number = 0; |
fda35943 | 2131 | tcp_ses->lstrp = jiffies; |
58fa015f | 2132 | spin_lock_init(&tcp_ses->req_lock); |
63c038c2 JL |
2133 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
2134 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 2135 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
63c038c2 JL |
2136 | |
2137 | /* | |
2138 | * at this point we are the only ones with the pointer | |
2139 | * to the struct since the kernel thread not created yet | |
2140 | * no need to spinlock this init of tcpStatus or srv_count | |
2141 | */ | |
2142 | tcp_ses->tcpStatus = CifsNew; | |
3eb9a889 BG |
2143 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
2144 | sizeof(tcp_ses->srcaddr)); | |
63c038c2 JL |
2145 | ++tcp_ses->srv_count; |
2146 | ||
a9ac49d3 | 2147 | if (addr.ss_family == AF_INET6) { |
b6b38f70 | 2148 | cFYI(1, "attempting ipv6 connect"); |
63c038c2 JL |
2149 | /* BB should we allow ipv6 on port 139? */ |
2150 | /* other OS never observed in Wild doing 139 with v6 */ | |
a9f1b85e PS |
2151 | memcpy(&tcp_ses->dstaddr, sin_server6, |
2152 | sizeof(struct sockaddr_in6)); | |
2153 | } else | |
2154 | memcpy(&tcp_ses->dstaddr, sin_server, | |
2155 | sizeof(struct sockaddr_in)); | |
2156 | ||
2157 | rc = ip_connect(tcp_ses); | |
63c038c2 | 2158 | if (rc < 0) { |
b6b38f70 | 2159 | cERROR(1, "Error connecting to socket. Aborting operation"); |
f7c5445a | 2160 | goto out_err_crypto_release; |
63c038c2 JL |
2161 | } |
2162 | ||
2163 | /* | |
2164 | * since we're in a cifs function already, we know that | |
2165 | * this will succeed. No need for try_module_get(). | |
2166 | */ | |
2167 | __module_get(THIS_MODULE); | |
7c97c200 | 2168 | tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, |
63c038c2 JL |
2169 | tcp_ses, "cifsd"); |
2170 | if (IS_ERR(tcp_ses->tsk)) { | |
2171 | rc = PTR_ERR(tcp_ses->tsk); | |
b6b38f70 | 2172 | cERROR(1, "error %d create cifsd thread", rc); |
63c038c2 | 2173 | module_put(THIS_MODULE); |
f7c5445a | 2174 | goto out_err_crypto_release; |
63c038c2 | 2175 | } |
fd88ce93 | 2176 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
63c038c2 JL |
2177 | |
2178 | /* thread spawned, put it on the list */ | |
3f9bcca7 | 2179 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 2180 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 2181 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 2182 | |
488f1d2d SJ |
2183 | cifs_fscache_get_client_cookie(tcp_ses); |
2184 | ||
c74093b6 | 2185 | /* queue echo request delayed work */ |
da472fc8 | 2186 | queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL); |
c74093b6 | 2187 | |
63c038c2 JL |
2188 | return tcp_ses; |
2189 | ||
f7c5445a | 2190 | out_err_crypto_release: |
d2b91521 SP |
2191 | cifs_crypto_shash_release(tcp_ses); |
2192 | ||
f1d0c998 RL |
2193 | put_net(cifs_net_ns(tcp_ses)); |
2194 | ||
63c038c2 JL |
2195 | out_err: |
2196 | if (tcp_ses) { | |
8347a5cd SF |
2197 | if (!IS_ERR(tcp_ses->hostname)) |
2198 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
2199 | if (tcp_ses->ssocket) |
2200 | sock_release(tcp_ses->ssocket); | |
2201 | kfree(tcp_ses); | |
2202 | } | |
2203 | return ERR_PTR(rc); | |
2204 | } | |
2205 | ||
96daf2b0 | 2206 | static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
37bb04e5 PS |
2207 | { |
2208 | switch (ses->server->secType) { | |
2209 | case Kerberos: | |
2210 | if (vol->cred_uid != ses->cred_uid) | |
2211 | return 0; | |
2212 | break; | |
2213 | default: | |
04febabc JL |
2214 | /* NULL username means anonymous session */ |
2215 | if (ses->user_name == NULL) { | |
2216 | if (!vol->nullauth) | |
2217 | return 0; | |
2218 | break; | |
2219 | } | |
2220 | ||
37bb04e5 | 2221 | /* anything else takes username/password */ |
04febabc JL |
2222 | if (strncmp(ses->user_name, |
2223 | vol->username ? vol->username : "", | |
37bb04e5 PS |
2224 | MAX_USERNAME_SIZE)) |
2225 | return 0; | |
2226 | if (strlen(vol->username) != 0 && | |
2227 | ses->password != NULL && | |
2228 | strncmp(ses->password, | |
2229 | vol->password ? vol->password : "", | |
2230 | MAX_PASSWORD_SIZE)) | |
2231 | return 0; | |
2232 | } | |
2233 | return 1; | |
2234 | } | |
2235 | ||
96daf2b0 | 2236 | static struct cifs_ses * |
4ff67b72 | 2237 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 2238 | { |
96daf2b0 | 2239 | struct cifs_ses *ses; |
dea570e0 | 2240 | |
3f9bcca7 | 2241 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 | 2242 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
37bb04e5 PS |
2243 | if (!match_session(ses, vol)) |
2244 | continue; | |
14fbf50d | 2245 | ++ses->ses_count; |
3f9bcca7 | 2246 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2247 | return ses; |
2248 | } | |
3f9bcca7 | 2249 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2250 | return NULL; |
2251 | } | |
dea570e0 | 2252 | |
14fbf50d | 2253 | static void |
96daf2b0 | 2254 | cifs_put_smb_ses(struct cifs_ses *ses) |
14fbf50d | 2255 | { |
58c45c58 | 2256 | unsigned int xid; |
14fbf50d | 2257 | struct TCP_Server_Info *server = ses->server; |
dea570e0 | 2258 | |
ac3aa2f8 | 2259 | cFYI(1, "%s: ses_count=%d", __func__, ses->ses_count); |
3f9bcca7 | 2260 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 2261 | if (--ses->ses_count > 0) { |
3f9bcca7 | 2262 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2263 | return; |
2264 | } | |
dea570e0 | 2265 | |
14fbf50d | 2266 | list_del_init(&ses->smb_ses_list); |
3f9bcca7 | 2267 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2268 | |
58c45c58 | 2269 | if (ses->status == CifsGood && server->ops->logoff) { |
6d5786a3 | 2270 | xid = get_xid(); |
58c45c58 | 2271 | server->ops->logoff(xid, ses); |
6d5786a3 | 2272 | _free_xid(xid); |
14fbf50d JL |
2273 | } |
2274 | sesInfoFree(ses); | |
2275 | cifs_put_tcp_session(server); | |
2276 | } | |
dea570e0 | 2277 | |
8a8798a5 JL |
2278 | #ifdef CONFIG_KEYS |
2279 | ||
2280 | /* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */ | |
2281 | #define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1) | |
2282 | ||
2283 | /* Populate username and pw fields from keyring if possible */ | |
2284 | static int | |
2285 | cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) | |
2286 | { | |
2287 | int rc = 0; | |
2288 | char *desc, *delim, *payload; | |
2289 | ssize_t len; | |
2290 | struct key *key; | |
2291 | struct TCP_Server_Info *server = ses->server; | |
2292 | struct sockaddr_in *sa; | |
2293 | struct sockaddr_in6 *sa6; | |
2294 | struct user_key_payload *upayload; | |
2295 | ||
2296 | desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL); | |
2297 | if (!desc) | |
2298 | return -ENOMEM; | |
2299 | ||
2300 | /* try to find an address key first */ | |
2301 | switch (server->dstaddr.ss_family) { | |
2302 | case AF_INET: | |
2303 | sa = (struct sockaddr_in *)&server->dstaddr; | |
2304 | sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr); | |
2305 | break; | |
2306 | case AF_INET6: | |
2307 | sa6 = (struct sockaddr_in6 *)&server->dstaddr; | |
2308 | sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr); | |
2309 | break; | |
2310 | default: | |
2311 | cFYI(1, "Bad ss_family (%hu)", server->dstaddr.ss_family); | |
2312 | rc = -EINVAL; | |
2313 | goto out_err; | |
2314 | } | |
2315 | ||
2316 | cFYI(1, "%s: desc=%s", __func__, desc); | |
2317 | key = request_key(&key_type_logon, desc, ""); | |
2318 | if (IS_ERR(key)) { | |
2319 | if (!ses->domainName) { | |
2320 | cFYI(1, "domainName is NULL"); | |
2321 | rc = PTR_ERR(key); | |
2322 | goto out_err; | |
2323 | } | |
2324 | ||
2325 | /* didn't work, try to find a domain key */ | |
2326 | sprintf(desc, "cifs:d:%s", ses->domainName); | |
2327 | cFYI(1, "%s: desc=%s", __func__, desc); | |
2328 | key = request_key(&key_type_logon, desc, ""); | |
2329 | if (IS_ERR(key)) { | |
2330 | rc = PTR_ERR(key); | |
2331 | goto out_err; | |
2332 | } | |
2333 | } | |
2334 | ||
2335 | down_read(&key->sem); | |
2336 | upayload = key->payload.data; | |
2337 | if (IS_ERR_OR_NULL(upayload)) { | |
4edc53c1 | 2338 | rc = upayload ? PTR_ERR(upayload) : -EINVAL; |
8a8798a5 JL |
2339 | goto out_key_put; |
2340 | } | |
2341 | ||
2342 | /* find first : in payload */ | |
2343 | payload = (char *)upayload->data; | |
2344 | delim = strnchr(payload, upayload->datalen, ':'); | |
2345 | cFYI(1, "payload=%s", payload); | |
2346 | if (!delim) { | |
2347 | cFYI(1, "Unable to find ':' in payload (datalen=%d)", | |
2348 | upayload->datalen); | |
2349 | rc = -EINVAL; | |
2350 | goto out_key_put; | |
2351 | } | |
2352 | ||
2353 | len = delim - payload; | |
2354 | if (len > MAX_USERNAME_SIZE || len <= 0) { | |
000f9bb8 | 2355 | cFYI(1, "Bad value from username search (len=%zd)", len); |
8a8798a5 JL |
2356 | rc = -EINVAL; |
2357 | goto out_key_put; | |
2358 | } | |
2359 | ||
2360 | vol->username = kstrndup(payload, len, GFP_KERNEL); | |
2361 | if (!vol->username) { | |
000f9bb8 | 2362 | cFYI(1, "Unable to allocate %zd bytes for username", len); |
8a8798a5 JL |
2363 | rc = -ENOMEM; |
2364 | goto out_key_put; | |
2365 | } | |
2366 | cFYI(1, "%s: username=%s", __func__, vol->username); | |
2367 | ||
2368 | len = key->datalen - (len + 1); | |
2369 | if (len > MAX_PASSWORD_SIZE || len <= 0) { | |
000f9bb8 | 2370 | cFYI(1, "Bad len for password search (len=%zd)", len); |
8a8798a5 JL |
2371 | rc = -EINVAL; |
2372 | kfree(vol->username); | |
2373 | vol->username = NULL; | |
2374 | goto out_key_put; | |
2375 | } | |
2376 | ||
2377 | ++delim; | |
2378 | vol->password = kstrndup(delim, len, GFP_KERNEL); | |
2379 | if (!vol->password) { | |
000f9bb8 | 2380 | cFYI(1, "Unable to allocate %zd bytes for password", len); |
8a8798a5 JL |
2381 | rc = -ENOMEM; |
2382 | kfree(vol->username); | |
2383 | vol->username = NULL; | |
2384 | goto out_key_put; | |
2385 | } | |
2386 | ||
2387 | out_key_put: | |
2388 | up_read(&key->sem); | |
2389 | key_put(key); | |
2390 | out_err: | |
2391 | kfree(desc); | |
2392 | cFYI(1, "%s: returning %d", __func__, rc); | |
2393 | return rc; | |
2394 | } | |
2395 | #else /* ! CONFIG_KEYS */ | |
2396 | static inline int | |
2397 | cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), | |
2398 | struct cifs_ses *ses __attribute__((unused))) | |
2399 | { | |
2400 | return -ENOSYS; | |
2401 | } | |
2402 | #endif /* CONFIG_KEYS */ | |
2403 | ||
d9b94201 SF |
2404 | static bool warned_on_ntlm; /* globals init to false automatically */ |
2405 | ||
96daf2b0 | 2406 | static struct cifs_ses * |
36988c76 JL |
2407 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
2408 | { | |
286170aa PS |
2409 | int rc = -ENOMEM; |
2410 | unsigned int xid; | |
96daf2b0 | 2411 | struct cifs_ses *ses; |
a9f1b85e PS |
2412 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
2413 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 | 2414 | |
6d5786a3 | 2415 | xid = get_xid(); |
36988c76 | 2416 | |
4ff67b72 | 2417 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 JL |
2418 | if (ses) { |
2419 | cFYI(1, "Existing smb sess found (status=%d)", ses->status); | |
2420 | ||
36988c76 | 2421 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
2422 | rc = cifs_negotiate_protocol(xid, ses); |
2423 | if (rc) { | |
2424 | mutex_unlock(&ses->session_mutex); | |
2425 | /* problem -- put our ses reference */ | |
2426 | cifs_put_smb_ses(ses); | |
6d5786a3 | 2427 | free_xid(xid); |
198b5682 JL |
2428 | return ERR_PTR(rc); |
2429 | } | |
36988c76 JL |
2430 | if (ses->need_reconnect) { |
2431 | cFYI(1, "Session needs reconnect"); | |
2432 | rc = cifs_setup_session(xid, ses, | |
2433 | volume_info->local_nls); | |
2434 | if (rc) { | |
2435 | mutex_unlock(&ses->session_mutex); | |
2436 | /* problem -- put our reference */ | |
2437 | cifs_put_smb_ses(ses); | |
6d5786a3 | 2438 | free_xid(xid); |
36988c76 JL |
2439 | return ERR_PTR(rc); |
2440 | } | |
2441 | } | |
2442 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
2443 | |
2444 | /* existing SMB ses has a server reference already */ | |
2445 | cifs_put_tcp_session(server); | |
6d5786a3 | 2446 | free_xid(xid); |
36988c76 JL |
2447 | return ses; |
2448 | } | |
2449 | ||
2450 | cFYI(1, "Existing smb sess not found"); | |
2451 | ses = sesInfoAlloc(); | |
2452 | if (ses == NULL) | |
2453 | goto get_ses_fail; | |
2454 | ||
2455 | /* new SMB session uses our server ref */ | |
2456 | ses->server = server; | |
a9f1b85e PS |
2457 | if (server->dstaddr.ss_family == AF_INET6) |
2458 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 2459 | else |
a9f1b85e | 2460 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 2461 | |
8727c8a8 SF |
2462 | if (volume_info->username) { |
2463 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
2464 | if (!ses->user_name) | |
2465 | goto get_ses_fail; | |
2466 | } | |
36988c76 JL |
2467 | |
2468 | /* volume_info->password freed at unmount */ | |
2469 | if (volume_info->password) { | |
2470 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2471 | if (!ses->password) | |
2472 | goto get_ses_fail; | |
2473 | } | |
2474 | if (volume_info->domainname) { | |
d3686d54 SP |
2475 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
2476 | if (!ses->domainName) | |
2477 | goto get_ses_fail; | |
36988c76 | 2478 | } |
3e4b3e1f | 2479 | ses->cred_uid = volume_info->cred_uid; |
36988c76 | 2480 | ses->linux_uid = volume_info->linux_uid; |
d9b94201 SF |
2481 | |
2482 | /* ntlmv2 is much stronger than ntlm security, and has been broadly | |
2483 | supported for many years, time to update default security mechanism */ | |
2484 | if ((volume_info->secFlg == 0) && warned_on_ntlm == false) { | |
2485 | warned_on_ntlm = true; | |
2486 | cERROR(1, "default security mechanism requested. The default " | |
2487 | "security mechanism will be upgraded from ntlm to " | |
225de11e | 2488 | "ntlmv2 in kernel release 3.3"); |
d9b94201 | 2489 | } |
36988c76 JL |
2490 | ses->overrideSecFlg = volume_info->secFlg; |
2491 | ||
2492 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
2493 | rc = cifs_negotiate_protocol(xid, ses); |
2494 | if (!rc) | |
2495 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 2496 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 2497 | if (rc) |
36988c76 JL |
2498 | goto get_ses_fail; |
2499 | ||
2500 | /* success, put it on the list */ | |
3f9bcca7 | 2501 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 2502 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 2503 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 | 2504 | |
6d5786a3 | 2505 | free_xid(xid); |
36988c76 JL |
2506 | return ses; |
2507 | ||
2508 | get_ses_fail: | |
2509 | sesInfoFree(ses); | |
6d5786a3 | 2510 | free_xid(xid); |
36988c76 JL |
2511 | return ERR_PTR(rc); |
2512 | } | |
2513 | ||
96daf2b0 | 2514 | static int match_tcon(struct cifs_tcon *tcon, const char *unc) |
37bb04e5 PS |
2515 | { |
2516 | if (tcon->tidStatus == CifsExiting) | |
2517 | return 0; | |
2518 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) | |
2519 | return 0; | |
2520 | return 1; | |
2521 | } | |
2522 | ||
96daf2b0 SF |
2523 | static struct cifs_tcon * |
2524 | cifs_find_tcon(struct cifs_ses *ses, const char *unc) | |
f1987b44 JL |
2525 | { |
2526 | struct list_head *tmp; | |
96daf2b0 | 2527 | struct cifs_tcon *tcon; |
f1987b44 | 2528 | |
3f9bcca7 | 2529 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2530 | list_for_each(tmp, &ses->tcon_list) { |
96daf2b0 | 2531 | tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
37bb04e5 | 2532 | if (!match_tcon(tcon, unc)) |
f1987b44 | 2533 | continue; |
f1987b44 | 2534 | ++tcon->tc_count; |
3f9bcca7 | 2535 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2536 | return tcon; |
1da177e4 | 2537 | } |
3f9bcca7 | 2538 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2539 | return NULL; |
2540 | } | |
2541 | ||
f1987b44 | 2542 | static void |
96daf2b0 | 2543 | cifs_put_tcon(struct cifs_tcon *tcon) |
f1987b44 | 2544 | { |
2e6e02ab | 2545 | unsigned int xid; |
96daf2b0 | 2546 | struct cifs_ses *ses = tcon->ses; |
f1987b44 | 2547 | |
ac3aa2f8 | 2548 | cFYI(1, "%s: tc_count=%d", __func__, tcon->tc_count); |
3f9bcca7 | 2549 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2550 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 2551 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2552 | return; |
2553 | } | |
2554 | ||
2555 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 2556 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 | 2557 | |
6d5786a3 | 2558 | xid = get_xid(); |
2e6e02ab PS |
2559 | if (ses->server->ops->tree_disconnect) |
2560 | ses->server->ops->tree_disconnect(xid, tcon); | |
6d5786a3 | 2561 | _free_xid(xid); |
f1987b44 | 2562 | |
d03382ce | 2563 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 2564 | tconInfoFree(tcon); |
f1987b44 JL |
2565 | cifs_put_smb_ses(ses); |
2566 | } | |
2567 | ||
96daf2b0 SF |
2568 | static struct cifs_tcon * |
2569 | cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) | |
d00c28de JL |
2570 | { |
2571 | int rc, xid; | |
96daf2b0 | 2572 | struct cifs_tcon *tcon; |
d00c28de JL |
2573 | |
2574 | tcon = cifs_find_tcon(ses, volume_info->UNC); | |
2575 | if (tcon) { | |
2576 | cFYI(1, "Found match on UNC path"); | |
2577 | /* existing tcon already has a reference */ | |
2578 | cifs_put_smb_ses(ses); | |
2579 | if (tcon->seal != volume_info->seal) | |
2580 | cERROR(1, "transport encryption setting " | |
2581 | "conflicts with existing tid"); | |
2582 | return tcon; | |
2583 | } | |
2584 | ||
2e6e02ab PS |
2585 | if (!ses->server->ops->tree_connect) { |
2586 | rc = -ENOSYS; | |
2587 | goto out_fail; | |
2588 | } | |
2589 | ||
d00c28de JL |
2590 | tcon = tconInfoAlloc(); |
2591 | if (tcon == NULL) { | |
2592 | rc = -ENOMEM; | |
2593 | goto out_fail; | |
2594 | } | |
2595 | ||
2596 | tcon->ses = ses; | |
2597 | if (volume_info->password) { | |
2598 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2599 | if (!tcon->password) { | |
2600 | rc = -ENOMEM; | |
2601 | goto out_fail; | |
2602 | } | |
2603 | } | |
2604 | ||
2605 | if (strchr(volume_info->UNC + 3, '\\') == NULL | |
2606 | && strchr(volume_info->UNC + 3, '/') == NULL) { | |
2607 | cERROR(1, "Missing share name"); | |
2608 | rc = -ENODEV; | |
2609 | goto out_fail; | |
2610 | } | |
2611 | ||
2e6e02ab PS |
2612 | /* |
2613 | * BB Do we need to wrap session_mutex around this TCon call and Unix | |
2614 | * SetFS as we do on SessSetup and reconnect? | |
2615 | */ | |
6d5786a3 | 2616 | xid = get_xid(); |
2e6e02ab PS |
2617 | rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon, |
2618 | volume_info->local_nls); | |
6d5786a3 | 2619 | free_xid(xid); |
2e6e02ab | 2620 | cFYI(1, "Tcon rc = %d", rc); |
d00c28de JL |
2621 | if (rc) |
2622 | goto out_fail; | |
2623 | ||
2624 | if (volume_info->nodfs) { | |
2625 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
2626 | cFYI(1, "DFS disabled (%d)", tcon->Flags); | |
2627 | } | |
2628 | tcon->seal = volume_info->seal; | |
2e6e02ab PS |
2629 | /* |
2630 | * We can have only one retry value for a connection to a share so for | |
2631 | * resources mounted more than once to the same server share the last | |
2632 | * value passed in for the retry flag is used. | |
2633 | */ | |
d00c28de JL |
2634 | tcon->retry = volume_info->retry; |
2635 | tcon->nocase = volume_info->nocase; | |
2636 | tcon->local_lease = volume_info->local_lease; | |
2637 | ||
3f9bcca7 | 2638 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 2639 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 2640 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 2641 | |
d03382ce SJ |
2642 | cifs_fscache_get_super_cookie(tcon); |
2643 | ||
d00c28de JL |
2644 | return tcon; |
2645 | ||
2646 | out_fail: | |
2647 | tconInfoFree(tcon); | |
2648 | return ERR_PTR(rc); | |
2649 | } | |
2650 | ||
9d002df4 JL |
2651 | void |
2652 | cifs_put_tlink(struct tcon_link *tlink) | |
2653 | { | |
2654 | if (!tlink || IS_ERR(tlink)) | |
2655 | return; | |
2656 | ||
2657 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
2658 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
2659 | tlink->tl_time = jiffies; | |
2660 | return; | |
2661 | } | |
2662 | ||
2663 | if (!IS_ERR(tlink_tcon(tlink))) | |
2664 | cifs_put_tcon(tlink_tcon(tlink)); | |
2665 | kfree(tlink); | |
2666 | return; | |
2667 | } | |
d00c28de | 2668 | |
25c7f41e | 2669 | static inline struct tcon_link * |
cd51875d PS |
2670 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
2671 | { | |
2672 | return cifs_sb->master_tlink; | |
2673 | } | |
25c7f41e PS |
2674 | |
2675 | static int | |
2676 | compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
2677 | { | |
2678 | struct cifs_sb_info *old = CIFS_SB(sb); | |
2679 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
2680 | ||
2681 | if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) | |
2682 | return 0; | |
2683 | ||
2684 | if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) != | |
2685 | (new->mnt_cifs_flags & CIFS_MOUNT_MASK)) | |
2686 | return 0; | |
2687 | ||
25c7f41e | 2688 | /* |
5eba8ab3 JL |
2689 | * We want to share sb only if we don't specify an r/wsize or |
2690 | * specified r/wsize is greater than or equal to existing one. | |
25c7f41e PS |
2691 | */ |
2692 | if (new->wsize && new->wsize < old->wsize) | |
2693 | return 0; | |
2694 | ||
5eba8ab3 JL |
2695 | if (new->rsize && new->rsize < old->rsize) |
2696 | return 0; | |
2697 | ||
25c7f41e PS |
2698 | if (old->mnt_uid != new->mnt_uid || old->mnt_gid != new->mnt_gid) |
2699 | return 0; | |
2700 | ||
2701 | if (old->mnt_file_mode != new->mnt_file_mode || | |
2702 | old->mnt_dir_mode != new->mnt_dir_mode) | |
2703 | return 0; | |
2704 | ||
2705 | if (strcmp(old->local_nls->charset, new->local_nls->charset)) | |
2706 | return 0; | |
2707 | ||
2708 | if (old->actimeo != new->actimeo) | |
2709 | return 0; | |
2710 | ||
2711 | return 1; | |
2712 | } | |
2713 | ||
2714 | int | |
2715 | cifs_match_super(struct super_block *sb, void *data) | |
2716 | { | |
2717 | struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; | |
2718 | struct smb_vol *volume_info; | |
2719 | struct cifs_sb_info *cifs_sb; | |
2720 | struct TCP_Server_Info *tcp_srv; | |
96daf2b0 SF |
2721 | struct cifs_ses *ses; |
2722 | struct cifs_tcon *tcon; | |
25c7f41e PS |
2723 | struct tcon_link *tlink; |
2724 | struct sockaddr_storage addr; | |
2725 | int rc = 0; | |
2726 | ||
2727 | memset(&addr, 0, sizeof(struct sockaddr_storage)); | |
2728 | ||
2729 | spin_lock(&cifs_tcp_ses_lock); | |
2730 | cifs_sb = CIFS_SB(sb); | |
2731 | tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
2732 | if (IS_ERR(tlink)) { | |
2733 | spin_unlock(&cifs_tcp_ses_lock); | |
2734 | return rc; | |
2735 | } | |
2736 | tcon = tlink_tcon(tlink); | |
2737 | ses = tcon->ses; | |
2738 | tcp_srv = ses->server; | |
2739 | ||
2740 | volume_info = mnt_data->vol; | |
2741 | ||
2742 | if (!volume_info->UNCip || !volume_info->UNC) | |
2743 | goto out; | |
2744 | ||
2745 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, | |
2746 | volume_info->UNCip, | |
2747 | strlen(volume_info->UNCip), | |
2748 | volume_info->port); | |
2749 | if (!rc) | |
2750 | goto out; | |
2751 | ||
2752 | if (!match_server(tcp_srv, (struct sockaddr *)&addr, volume_info) || | |
2753 | !match_session(ses, volume_info) || | |
2754 | !match_tcon(tcon, volume_info->UNC)) { | |
2755 | rc = 0; | |
2756 | goto out; | |
2757 | } | |
2758 | ||
2759 | rc = compare_mount_options(sb, mnt_data); | |
2760 | out: | |
25c7f41e | 2761 | spin_unlock(&cifs_tcp_ses_lock); |
f484b5d0 | 2762 | cifs_put_tlink(tlink); |
25c7f41e PS |
2763 | return rc; |
2764 | } | |
2765 | ||
1da177e4 | 2766 | int |
6d5786a3 | 2767 | get_dfs_path(unsigned int xid, struct cifs_ses *ses, const char *old_path, |
2e6e02ab PS |
2768 | const struct nls_table *nls_codepage, unsigned int *num_referrals, |
2769 | struct dfs_info3_param **referrals, int remap) | |
1da177e4 LT |
2770 | { |
2771 | char *temp_unc; | |
2772 | int rc = 0; | |
2773 | ||
2e6e02ab PS |
2774 | if (!ses->server->ops->tree_connect) |
2775 | return -ENOSYS; | |
2776 | ||
2777 | *num_referrals = 0; | |
2778 | *referrals = NULL; | |
1da177e4 | 2779 | |
2e6e02ab | 2780 | if (ses->ipc_tid == 0) { |
1da177e4 | 2781 | temp_unc = kmalloc(2 /* for slashes */ + |
2e6e02ab PS |
2782 | strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2) |
2783 | + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL); | |
1da177e4 LT |
2784 | if (temp_unc == NULL) |
2785 | return -ENOMEM; | |
2786 | temp_unc[0] = '\\'; | |
2787 | temp_unc[1] = '\\'; | |
2e6e02ab PS |
2788 | strcpy(temp_unc + 2, ses->serverName); |
2789 | strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$"); | |
2790 | rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL, | |
2791 | nls_codepage); | |
2792 | cFYI(1, "Tcon rc = %d ipc_tid = %d", rc, ses->ipc_tid); | |
1da177e4 LT |
2793 | kfree(temp_unc); |
2794 | } | |
2795 | if (rc == 0) | |
2e6e02ab PS |
2796 | rc = CIFSGetDFSRefer(xid, ses, old_path, referrals, |
2797 | num_referrals, nls_codepage, remap); | |
2798 | /* | |
2799 | * BB - map targetUNCs to dfs_info3 structures, here or in | |
2800 | * CIFSGetDFSRefer. | |
2801 | */ | |
1da177e4 LT |
2802 | |
2803 | return rc; | |
2804 | } | |
2805 | ||
09e50d55 JL |
2806 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
2807 | static struct lock_class_key cifs_key[2]; | |
2808 | static struct lock_class_key cifs_slock_key[2]; | |
2809 | ||
2810 | static inline void | |
2811 | cifs_reclassify_socket4(struct socket *sock) | |
2812 | { | |
2813 | struct sock *sk = sock->sk; | |
2814 | BUG_ON(sock_owned_by_user(sk)); | |
2815 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", | |
2816 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
2817 | } | |
2818 | ||
2819 | static inline void | |
2820 | cifs_reclassify_socket6(struct socket *sock) | |
2821 | { | |
2822 | struct sock *sk = sock->sk; | |
2823 | BUG_ON(sock_owned_by_user(sk)); | |
2824 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", | |
2825 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
2826 | } | |
2827 | #else | |
2828 | static inline void | |
2829 | cifs_reclassify_socket4(struct socket *sock) | |
2830 | { | |
2831 | } | |
2832 | ||
2833 | static inline void | |
2834 | cifs_reclassify_socket6(struct socket *sock) | |
2835 | { | |
2836 | } | |
2837 | #endif | |
2838 | ||
1da177e4 | 2839 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 2840 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 2841 | { |
50c2f753 | 2842 | unsigned int i, j; |
1da177e4 | 2843 | |
50c2f753 | 2844 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
2845 | /* mask a nibble at a time and encode */ |
2846 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
2847 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 2848 | j += 2; |
1da177e4 LT |
2849 | } |
2850 | ||
2851 | } | |
2852 | ||
3eb9a889 BG |
2853 | static int |
2854 | bind_socket(struct TCP_Server_Info *server) | |
2855 | { | |
2856 | int rc = 0; | |
2857 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
2858 | /* Bind to the specified local IP address */ | |
2859 | struct socket *socket = server->ssocket; | |
2860 | rc = socket->ops->bind(socket, | |
2861 | (struct sockaddr *) &server->srcaddr, | |
2862 | sizeof(server->srcaddr)); | |
2863 | if (rc < 0) { | |
2864 | struct sockaddr_in *saddr4; | |
2865 | struct sockaddr_in6 *saddr6; | |
2866 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
2867 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
2868 | if (saddr6->sin6_family == AF_INET6) | |
2869 | cERROR(1, "cifs: " | |
ac3aa2f8 | 2870 | "Failed to bind to: %pI6c, error: %d", |
3eb9a889 BG |
2871 | &saddr6->sin6_addr, rc); |
2872 | else | |
2873 | cERROR(1, "cifs: " | |
ac3aa2f8 | 2874 | "Failed to bind to: %pI4, error: %d", |
3eb9a889 BG |
2875 | &saddr4->sin_addr.s_addr, rc); |
2876 | } | |
2877 | } | |
2878 | return rc; | |
2879 | } | |
1da177e4 LT |
2880 | |
2881 | static int | |
a9f1b85e | 2882 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
2883 | { |
2884 | int rc = 0; | |
a9f1b85e PS |
2885 | /* |
2886 | * some servers require RFC1001 sessinit before sending | |
2887 | * negprot - BB check reconnection in case where second | |
2888 | * sessinit is sent but no second negprot | |
2889 | */ | |
2890 | struct rfc1002_session_packet *ses_init_buf; | |
2891 | struct smb_hdr *smb_buf; | |
2892 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
2893 | GFP_KERNEL); | |
2894 | if (ses_init_buf) { | |
2895 | ses_init_buf->trailer.session_req.called_len = 32; | |
2896 | ||
2897 | if (server->server_RFC1001_name && | |
2898 | server->server_RFC1001_name[0] != 0) | |
2899 | rfc1002mangle(ses_init_buf->trailer. | |
2900 | session_req.called_name, | |
2901 | server->server_RFC1001_name, | |
2902 | RFC1001_NAME_LEN_WITH_NULL); | |
2903 | else | |
2904 | rfc1002mangle(ses_init_buf->trailer. | |
2905 | session_req.called_name, | |
2906 | DEFAULT_CIFS_CALLED_NAME, | |
2907 | RFC1001_NAME_LEN_WITH_NULL); | |
2908 | ||
2909 | ses_init_buf->trailer.session_req.calling_len = 32; | |
2910 | ||
2911 | /* | |
2912 | * calling name ends in null (byte 16) from old smb | |
2913 | * convention. | |
2914 | */ | |
2915 | if (server->workstation_RFC1001_name && | |
2916 | server->workstation_RFC1001_name[0] != 0) | |
2917 | rfc1002mangle(ses_init_buf->trailer. | |
2918 | session_req.calling_name, | |
2919 | server->workstation_RFC1001_name, | |
2920 | RFC1001_NAME_LEN_WITH_NULL); | |
2921 | else | |
2922 | rfc1002mangle(ses_init_buf->trailer. | |
2923 | session_req.calling_name, | |
2924 | "LINUX_CIFS_CLNT", | |
2925 | RFC1001_NAME_LEN_WITH_NULL); | |
2926 | ||
2927 | ses_init_buf->trailer.session_req.scope1 = 0; | |
2928 | ses_init_buf->trailer.session_req.scope2 = 0; | |
2929 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
2930 | ||
2931 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
be8e3b00 | 2932 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
a9f1b85e PS |
2933 | rc = smb_send(server, smb_buf, 0x44); |
2934 | kfree(ses_init_buf); | |
2935 | /* | |
2936 | * RFC1001 layer in at least one server | |
2937 | * requires very short break before negprot | |
2938 | * presumably because not expecting negprot | |
2939 | * to follow so fast. This is a simple | |
2940 | * solution that works without | |
2941 | * complicating the code and causes no | |
2942 | * significant slowing down on mount | |
2943 | * for everyone else | |
2944 | */ | |
2945 | usleep_range(1000, 2000); | |
2946 | } | |
2947 | /* | |
2948 | * else the negprot may still work without this | |
2949 | * even though malloc failed | |
2950 | */ | |
2951 | ||
2952 | return rc; | |
2953 | } | |
2954 | ||
2955 | static int | |
2956 | generic_ip_connect(struct TCP_Server_Info *server) | |
2957 | { | |
2958 | int rc = 0; | |
6da97910 | 2959 | __be16 sport; |
a9f1b85e | 2960 | int slen, sfamily; |
bcf4b106 | 2961 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
2962 | struct sockaddr *saddr; |
2963 | ||
2964 | saddr = (struct sockaddr *) &server->dstaddr; | |
2965 | ||
2966 | if (server->dstaddr.ss_family == AF_INET6) { | |
2967 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
2968 | slen = sizeof(struct sockaddr_in6); | |
2969 | sfamily = AF_INET6; | |
2970 | } else { | |
2971 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
2972 | slen = sizeof(struct sockaddr_in); | |
2973 | sfamily = AF_INET; | |
2974 | } | |
1da177e4 | 2975 | |
bcf4b106 | 2976 | if (socket == NULL) { |
f1d0c998 RL |
2977 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
2978 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 2979 | if (rc < 0) { |
b6b38f70 | 2980 | cERROR(1, "Error %d creating socket", rc); |
a9f1b85e | 2981 | server->ssocket = NULL; |
1da177e4 | 2982 | return rc; |
1da177e4 | 2983 | } |
bcf4b106 JL |
2984 | |
2985 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
b6b38f70 | 2986 | cFYI(1, "Socket created"); |
bcf4b106 JL |
2987 | server->ssocket = socket; |
2988 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
2989 | if (sfamily == AF_INET6) |
2990 | cifs_reclassify_socket6(socket); | |
2991 | else | |
2992 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
2993 | } |
2994 | ||
3eb9a889 BG |
2995 | rc = bind_socket(server); |
2996 | if (rc < 0) | |
2997 | return rc; | |
2998 | ||
bcf4b106 JL |
2999 | /* |
3000 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
3001 | * the default. sock_setsockopt not used because it expects |
3002 | * user space buffer | |
bcf4b106 JL |
3003 | */ |
3004 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 3005 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 3006 | |
b387eaeb | 3007 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
3008 | if (server->noautotune) { |
3009 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
3010 | socket->sk->sk_sndbuf = 200 * 1024; | |
3011 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
3012 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 3013 | } |
1da177e4 | 3014 | |
6a5fa236 | 3015 | if (server->tcp_nodelay) { |
a9f1b85e | 3016 | int val = 1; |
6a5fa236 SF |
3017 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
3018 | (char *)&val, sizeof(val)); | |
3019 | if (rc) | |
b6b38f70 | 3020 | cFYI(1, "set TCP_NODELAY socket option error %d", rc); |
6a5fa236 SF |
3021 | } |
3022 | ||
b6b38f70 | 3023 | cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx", |
bcf4b106 | 3024 | socket->sk->sk_sndbuf, |
b6b38f70 | 3025 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 3026 | |
ee1b3ea9 JL |
3027 | rc = socket->ops->connect(socket, saddr, slen, 0); |
3028 | if (rc < 0) { | |
3029 | cFYI(1, "Error %d connecting to server", rc); | |
3030 | sock_release(socket); | |
3031 | server->ssocket = NULL; | |
3032 | return rc; | |
3033 | } | |
3034 | ||
a9f1b85e PS |
3035 | if (sport == htons(RFC1001_PORT)) |
3036 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 3037 | |
1da177e4 LT |
3038 | return rc; |
3039 | } | |
3040 | ||
3041 | static int | |
a9f1b85e | 3042 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 3043 | { |
6da97910 | 3044 | __be16 *sport; |
a9f1b85e PS |
3045 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
3046 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 3047 | |
a9f1b85e PS |
3048 | if (server->dstaddr.ss_family == AF_INET6) |
3049 | sport = &addr6->sin6_port; | |
3050 | else | |
3051 | sport = &addr->sin_port; | |
1da177e4 | 3052 | |
a9f1b85e PS |
3053 | if (*sport == 0) { |
3054 | int rc; | |
1da177e4 | 3055 | |
a9f1b85e PS |
3056 | /* try with 445 port at first */ |
3057 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 3058 | |
a9f1b85e | 3059 | rc = generic_ip_connect(server); |
1da177e4 | 3060 | if (rc >= 0) |
a9f1b85e | 3061 | return rc; |
6a5fa236 | 3062 | |
a9f1b85e PS |
3063 | /* if it failed, try with 139 port */ |
3064 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
3065 | } |
3066 | ||
a9f1b85e | 3067 | return generic_ip_connect(server); |
1da177e4 LT |
3068 | } |
3069 | ||
6d5786a3 | 3070 | void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon, |
2c6292ae | 3071 | struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) |
8af18971 SF |
3072 | { |
3073 | /* if we are reconnecting then should we check to see if | |
3074 | * any requested capabilities changed locally e.g. via | |
3075 | * remount but we can not do much about it here | |
3076 | * if they have (even if we could detect it by the following) | |
3077 | * Perhaps we could add a backpointer to array of sb from tcon | |
3078 | * or if we change to make all sb to same share the same | |
3079 | * sb as NFS - then we only have one backpointer to sb. | |
3080 | * What if we wanted to mount the server share twice once with | |
3081 | * and once without posixacls or posix paths? */ | |
3082 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 3083 | |
c18c842b SF |
3084 | if (vol_info && vol_info->no_linux_ext) { |
3085 | tcon->fsUnixInfo.Capability = 0; | |
3086 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
b6b38f70 | 3087 | cFYI(1, "Linux protocol extensions disabled"); |
c18c842b SF |
3088 | return; |
3089 | } else if (vol_info) | |
3090 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
3091 | ||
3092 | if (tcon->unix_ext == 0) { | |
b6b38f70 | 3093 | cFYI(1, "Unix extensions disabled so not set on reconnect"); |
c18c842b SF |
3094 | return; |
3095 | } | |
50c2f753 | 3096 | |
fb8c4b14 | 3097 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 3098 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
6848b733 | 3099 | cFYI(1, "unix caps which server supports %lld", cap); |
8af18971 SF |
3100 | /* check for reconnect case in which we do not |
3101 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 3102 | if (vol_info == NULL) { |
50c2f753 | 3103 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
3104 | originally at mount time */ |
3105 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
3106 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
3107 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
3108 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
b6b38f70 | 3109 | cERROR(1, "POSIXPATH support change"); |
8af18971 | 3110 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 3111 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
b6b38f70 JP |
3112 | cERROR(1, "possible reconnect error"); |
3113 | cERROR(1, "server disabled POSIX path support"); | |
11b6d645 | 3114 | } |
8af18971 | 3115 | } |
50c2f753 | 3116 | |
6848b733 SF |
3117 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
3118 | cERROR(1, "per-share encryption not supported yet"); | |
3119 | ||
8af18971 | 3120 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 3121 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 3122 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 3123 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
b6b38f70 | 3124 | cFYI(1, "negotiated posix acl support"); |
2c6292ae AV |
3125 | if (cifs_sb) |
3126 | cifs_sb->mnt_cifs_flags |= | |
3127 | CIFS_MOUNT_POSIXACL; | |
8af18971 SF |
3128 | } |
3129 | ||
75865f8c | 3130 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 3131 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 3132 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
b6b38f70 | 3133 | cFYI(1, "negotiate posix pathnames"); |
2c6292ae AV |
3134 | if (cifs_sb) |
3135 | cifs_sb->mnt_cifs_flags |= | |
8af18971 SF |
3136 | CIFS_MOUNT_POSIX_PATHS; |
3137 | } | |
50c2f753 | 3138 | |
b6b38f70 | 3139 | cFYI(1, "Negotiate caps 0x%x", (int)cap); |
8af18971 | 3140 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 3141 | if (cap & CIFS_UNIX_FCNTL_CAP) |
b6b38f70 | 3142 | cFYI(1, "FCNTL cap"); |
75865f8c | 3143 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
b6b38f70 | 3144 | cFYI(1, "EXTATTR cap"); |
75865f8c | 3145 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
b6b38f70 | 3146 | cFYI(1, "POSIX path cap"); |
75865f8c | 3147 | if (cap & CIFS_UNIX_XATTR_CAP) |
b6b38f70 | 3148 | cFYI(1, "XATTR cap"); |
75865f8c | 3149 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
b6b38f70 | 3150 | cFYI(1, "POSIX ACL cap"); |
75865f8c | 3151 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
b6b38f70 | 3152 | cFYI(1, "very large read cap"); |
75865f8c | 3153 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
b6b38f70 | 3154 | cFYI(1, "very large write cap"); |
6848b733 SF |
3155 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
3156 | cFYI(1, "transport encryption cap"); | |
3157 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) | |
3158 | cFYI(1, "mandatory transport encryption cap"); | |
8af18971 SF |
3159 | #endif /* CIFS_DEBUG2 */ |
3160 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 3161 | if (vol_info == NULL) { |
b6b38f70 | 3162 | cFYI(1, "resetting capabilities failed"); |
442aa310 | 3163 | } else |
b6b38f70 | 3164 | cERROR(1, "Negotiating Unix capabilities " |
ac3aa2f8 JL |
3165 | "with the server failed. Consider " |
3166 | "mounting with the Unix Extensions " | |
3167 | "disabled if problems are found " | |
5a44b319 | 3168 | "by specifying the nounix mount " |
b6b38f70 | 3169 | "option."); |
5a44b319 | 3170 | |
8af18971 SF |
3171 | } |
3172 | } | |
3173 | } | |
3174 | ||
724d9f1c PS |
3175 | void cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
3176 | struct cifs_sb_info *cifs_sb) | |
b1c8d2b4 | 3177 | { |
2de970ff JL |
3178 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
3179 | ||
2ced6f69 AV |
3180 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
3181 | cifs_sb->tlink_tree = RB_ROOT; | |
3182 | ||
25c7f41e | 3183 | /* |
5eba8ab3 JL |
3184 | * Temporarily set r/wsize for matching superblock. If we end up using |
3185 | * new sb then client will later negotiate it downward if needed. | |
25c7f41e | 3186 | */ |
5eba8ab3 | 3187 | cifs_sb->rsize = pvolume_info->rsize; |
25c7f41e PS |
3188 | cifs_sb->wsize = pvolume_info->wsize; |
3189 | ||
3b795210 SF |
3190 | cifs_sb->mnt_uid = pvolume_info->linux_uid; |
3191 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
3192 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
3193 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
5206efd6 | 3194 | cFYI(1, "file mode: 0x%hx dir mode: 0x%hx", |
b6b38f70 | 3195 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); |
3b795210 | 3196 | |
6d20e840 | 3197 | cifs_sb->actimeo = pvolume_info->actimeo; |
724d9f1c | 3198 | cifs_sb->local_nls = pvolume_info->local_nls; |
6d20e840 | 3199 | |
3b795210 SF |
3200 | if (pvolume_info->noperm) |
3201 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
3202 | if (pvolume_info->setuids) | |
3203 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
3204 | if (pvolume_info->server_ino) | |
3205 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
3206 | if (pvolume_info->remap) | |
3207 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; | |
3208 | if (pvolume_info->no_xattr) | |
3209 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
3210 | if (pvolume_info->sfu_emul) | |
3211 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
3212 | if (pvolume_info->nobrl) | |
3213 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 3214 | if (pvolume_info->nostrictsync) |
4717bed6 | 3215 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
3216 | if (pvolume_info->mand_lock) |
3217 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
d4ffff1f PS |
3218 | if (pvolume_info->rwpidforward) |
3219 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; | |
3b795210 SF |
3220 | if (pvolume_info->cifs_acl) |
3221 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
3c7c87fd | 3222 | if (pvolume_info->backupuid_specified) { |
3d3ea8e6 | 3223 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; |
3c7c87fd SP |
3224 | cifs_sb->mnt_backupuid = pvolume_info->backupuid; |
3225 | } | |
3226 | if (pvolume_info->backupgid_specified) { | |
3d3ea8e6 | 3227 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; |
3c7c87fd SP |
3228 | cifs_sb->mnt_backupgid = pvolume_info->backupgid; |
3229 | } | |
3b795210 SF |
3230 | if (pvolume_info->override_uid) |
3231 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
3232 | if (pvolume_info->override_gid) | |
3233 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
3234 | if (pvolume_info->dynperm) | |
3235 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
3236 | if (pvolume_info->fsc) |
3237 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
3238 | if (pvolume_info->multiuser) |
3239 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
3240 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
3241 | if (pvolume_info->strict_io) |
3242 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 3243 | if (pvolume_info->direct_io) { |
b6b38f70 | 3244 | cFYI(1, "mounting share using direct i/o"); |
3b795210 SF |
3245 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
3246 | } | |
736a3320 SM |
3247 | if (pvolume_info->mfsymlinks) { |
3248 | if (pvolume_info->sfu_emul) { | |
3249 | cERROR(1, "mount option mfsymlinks ignored if sfu " | |
3250 | "mount option is used"); | |
3251 | } else { | |
3252 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; | |
3253 | } | |
3254 | } | |
3b795210 SF |
3255 | |
3256 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
b6b38f70 JP |
3257 | cERROR(1, "mount option dynperm ignored if cifsacl " |
3258 | "mount option supported"); | |
b1c8d2b4 JL |
3259 | } |
3260 | ||
f7910cbd | 3261 | /* |
5eba8ab3 JL |
3262 | * When the server supports very large reads and writes via POSIX extensions, |
3263 | * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not | |
3264 | * including the RFC1001 length. | |
f7910cbd JL |
3265 | * |
3266 | * Note that this might make for "interesting" allocation problems during | |
1190f6a0 JL |
3267 | * writeback however as we have to allocate an array of pointers for the |
3268 | * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096. | |
5eba8ab3 JL |
3269 | * |
3270 | * For reads, there is a similar problem as we need to allocate an array | |
3271 | * of kvecs to handle the receive, though that should only need to be done | |
3272 | * once. | |
f7910cbd | 3273 | */ |
1190f6a0 | 3274 | #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) |
5eba8ab3 | 3275 | #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4) |
f7910cbd JL |
3276 | |
3277 | /* | |
5eba8ab3 JL |
3278 | * When the server doesn't allow large posix writes, only allow a rsize/wsize |
3279 | * of 2^17-1 minus the size of the call header. That allows for a read or | |
3280 | * write up to the maximum size described by RFC1002. | |
f7910cbd | 3281 | */ |
94443f43 | 3282 | #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4) |
5eba8ab3 | 3283 | #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4) |
f7910cbd JL |
3284 | |
3285 | /* | |
3286 | * The default wsize is 1M. find_get_pages seems to return a maximum of 256 | |
3287 | * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill | |
3288 | * a single wsize request with a single call. | |
3289 | */ | |
5eba8ab3 JL |
3290 | #define CIFS_DEFAULT_IOSIZE (1024 * 1024) |
3291 | ||
3292 | /* | |
ce91acb3 JL |
3293 | * Windows only supports a max of 60kb reads and 65535 byte writes. Default to |
3294 | * those values when posix extensions aren't in force. In actuality here, we | |
3295 | * use 65536 to allow for a write that is a multiple of 4k. Most servers seem | |
3296 | * to be ok with the extra byte even though Windows doesn't send writes that | |
3297 | * are that large. | |
3298 | * | |
3299 | * Citation: | |
3300 | * | |
3301 | * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx | |
5eba8ab3 JL |
3302 | */ |
3303 | #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024) | |
ce91acb3 | 3304 | #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536) |
f7910cbd | 3305 | |
3ae629d9 JL |
3306 | /* |
3307 | * On hosts with high memory, we can't currently support wsize/rsize that are | |
3308 | * larger than we can kmap at once. Cap the rsize/wsize at | |
3309 | * LAST_PKMAP * PAGE_SIZE. We'll never be able to fill a read or write request | |
3310 | * larger than that anyway. | |
3311 | */ | |
3312 | #ifdef CONFIG_HIGHMEM | |
3313 | #define CIFS_KMAP_SIZE_LIMIT (LAST_PKMAP * PAGE_CACHE_SIZE) | |
3314 | #else /* CONFIG_HIGHMEM */ | |
3315 | #define CIFS_KMAP_SIZE_LIMIT (1<<24) | |
3316 | #endif /* CONFIG_HIGHMEM */ | |
3317 | ||
f7910cbd | 3318 | static unsigned int |
96daf2b0 | 3319 | cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info) |
f7910cbd JL |
3320 | { |
3321 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
3322 | struct TCP_Server_Info *server = tcon->ses->server; | |
ce91acb3 JL |
3323 | unsigned int wsize; |
3324 | ||
3325 | /* start with specified wsize, or default */ | |
3326 | if (pvolume_info->wsize) | |
3327 | wsize = pvolume_info->wsize; | |
3328 | else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) | |
3329 | wsize = CIFS_DEFAULT_IOSIZE; | |
3330 | else | |
3331 | wsize = CIFS_DEFAULT_NON_POSIX_WSIZE; | |
f7910cbd JL |
3332 | |
3333 | /* can server support 24-bit write sizes? (via UNIX extensions) */ | |
3334 | if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) | |
1190f6a0 | 3335 | wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE); |
f7910cbd | 3336 | |
1190f6a0 JL |
3337 | /* |
3338 | * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set? | |
3339 | * Limit it to max buffer offered by the server, minus the size of the | |
3340 | * WRITEX header, not including the 4 byte RFC1001 length. | |
3341 | */ | |
3342 | if (!(server->capabilities & CAP_LARGE_WRITE_X) || | |
3343 | (!(server->capabilities & CAP_UNIX) && | |
3344 | (server->sec_mode & (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)))) | |
3345 | wsize = min_t(unsigned int, wsize, | |
3346 | server->maxBuf - sizeof(WRITE_REQ) + 4); | |
f7910cbd | 3347 | |
3ae629d9 JL |
3348 | /* limit to the amount that we can kmap at once */ |
3349 | wsize = min_t(unsigned int, wsize, CIFS_KMAP_SIZE_LIMIT); | |
3350 | ||
f7910cbd JL |
3351 | /* hard limit of CIFS_MAX_WSIZE */ |
3352 | wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE); | |
3353 | ||
3354 | return wsize; | |
3355 | } | |
3356 | ||
5eba8ab3 JL |
3357 | static unsigned int |
3358 | cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info) | |
3359 | { | |
3360 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
3361 | struct TCP_Server_Info *server = tcon->ses->server; | |
3362 | unsigned int rsize, defsize; | |
3363 | ||
3364 | /* | |
3365 | * Set default value... | |
3366 | * | |
3367 | * HACK alert! Ancient servers have very small buffers. Even though | |
3368 | * MS-CIFS indicates that servers are only limited by the client's | |
3369 | * bufsize for reads, testing against win98se shows that it throws | |
3370 | * INVALID_PARAMETER errors if you try to request too large a read. | |
ec01d738 | 3371 | * OS/2 just sends back short reads. |
5eba8ab3 | 3372 | * |
ec01d738 JL |
3373 | * If the server doesn't advertise CAP_LARGE_READ_X, then assume that |
3374 | * it can't handle a read request larger than its MaxBufferSize either. | |
5eba8ab3 JL |
3375 | */ |
3376 | if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP)) | |
3377 | defsize = CIFS_DEFAULT_IOSIZE; | |
3378 | else if (server->capabilities & CAP_LARGE_READ_X) | |
3379 | defsize = CIFS_DEFAULT_NON_POSIX_RSIZE; | |
5eba8ab3 JL |
3380 | else |
3381 | defsize = server->maxBuf - sizeof(READ_RSP); | |
3382 | ||
3383 | rsize = pvolume_info->rsize ? pvolume_info->rsize : defsize; | |
3384 | ||
3385 | /* | |
3386 | * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to | |
3387 | * the client's MaxBufferSize. | |
3388 | */ | |
3389 | if (!(server->capabilities & CAP_LARGE_READ_X)) | |
3390 | rsize = min_t(unsigned int, CIFSMaxBufSize, rsize); | |
3391 | ||
3ae629d9 JL |
3392 | /* limit to the amount that we can kmap at once */ |
3393 | rsize = min_t(unsigned int, rsize, CIFS_KMAP_SIZE_LIMIT); | |
3394 | ||
5eba8ab3 JL |
3395 | /* hard limit of CIFS_MAX_RSIZE */ |
3396 | rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE); | |
3397 | ||
3398 | return rsize; | |
3399 | } | |
3400 | ||
e4cce94c | 3401 | static int |
6d5786a3 | 3402 | is_path_accessible(unsigned int xid, struct cifs_tcon *tcon, |
e4cce94c IM |
3403 | struct cifs_sb_info *cifs_sb, const char *full_path) |
3404 | { | |
3405 | int rc; | |
e4cce94c IM |
3406 | FILE_ALL_INFO *pfile_info; |
3407 | ||
e4cce94c IM |
3408 | pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
3409 | if (pfile_info == NULL) | |
3410 | return -ENOMEM; | |
3411 | ||
3412 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info, | |
3413 | 0 /* not legacy */, cifs_sb->local_nls, | |
3414 | cifs_sb->mnt_cifs_flags & | |
3415 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
221d1d79 JL |
3416 | |
3417 | if (rc == -EOPNOTSUPP || rc == -EINVAL) | |
3418 | rc = SMBQueryInformation(xid, tcon, full_path, pfile_info, | |
3419 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
3420 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
e4cce94c IM |
3421 | kfree(pfile_info); |
3422 | return rc; | |
3423 | } | |
3424 | ||
b9bce2e9 JL |
3425 | static void |
3426 | cleanup_volume_info_contents(struct smb_vol *volume_info) | |
1bfe73c2 | 3427 | { |
b946845a | 3428 | kfree(volume_info->username); |
1bfe73c2 | 3429 | kzfree(volume_info->password); |
13589c43 SF |
3430 | if (volume_info->UNCip != volume_info->UNC + 2) |
3431 | kfree(volume_info->UNCip); | |
95c75454 | 3432 | kfree(volume_info->UNC); |
b946845a SF |
3433 | kfree(volume_info->domainname); |
3434 | kfree(volume_info->iocharset); | |
1bfe73c2 | 3435 | kfree(volume_info->prepath); |
b9bce2e9 JL |
3436 | } |
3437 | ||
3438 | void | |
3439 | cifs_cleanup_volume_info(struct smb_vol *volume_info) | |
3440 | { | |
3441 | if (!volume_info) | |
3442 | return; | |
3443 | cleanup_volume_info_contents(volume_info); | |
1bfe73c2 | 3444 | kfree(volume_info); |
1bfe73c2 IM |
3445 | } |
3446 | ||
b9bce2e9 | 3447 | |
2d6d589d | 3448 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1bfe73c2 IM |
3449 | /* build_path_to_root returns full path to root when |
3450 | * we do not have an exiting connection (tcon) */ | |
3451 | static char * | |
b2a0fa15 | 3452 | build_unc_path_to_root(const struct smb_vol *vol, |
1bfe73c2 IM |
3453 | const struct cifs_sb_info *cifs_sb) |
3454 | { | |
b2a0fa15 JL |
3455 | char *full_path, *pos; |
3456 | unsigned int pplen = vol->prepath ? strlen(vol->prepath) : 0; | |
3457 | unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); | |
1bfe73c2 | 3458 | |
b2a0fa15 | 3459 | full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); |
1bfe73c2 IM |
3460 | if (full_path == NULL) |
3461 | return ERR_PTR(-ENOMEM); | |
3462 | ||
b2a0fa15 JL |
3463 | strncpy(full_path, vol->UNC, unc_len); |
3464 | pos = full_path + unc_len; | |
3465 | ||
3466 | if (pplen) { | |
3467 | strncpy(pos, vol->prepath, pplen); | |
3468 | pos += pplen; | |
3469 | } | |
3470 | ||
3471 | *pos = '\0'; /* add trailing null */ | |
f87d39d9 | 3472 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
b2a0fa15 | 3473 | cFYI(1, "%s: full_path=%s", __func__, full_path); |
1bfe73c2 IM |
3474 | return full_path; |
3475 | } | |
dd613945 SF |
3476 | |
3477 | /* | |
3478 | * Perform a dfs referral query for a share and (optionally) prefix | |
3479 | * | |
046462ab SF |
3480 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
3481 | * to a string containing updated options for the submount. Otherwise it | |
3482 | * will be left untouched. | |
dd613945 SF |
3483 | * |
3484 | * Returns the rc from get_dfs_path to the caller, which can be used to | |
3485 | * determine whether there were referrals. | |
3486 | */ | |
3487 | static int | |
6d5786a3 | 3488 | expand_dfs_referral(unsigned int xid, struct cifs_ses *pSesInfo, |
dd613945 | 3489 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, |
046462ab | 3490 | int check_prefix) |
dd613945 SF |
3491 | { |
3492 | int rc; | |
3493 | unsigned int num_referrals = 0; | |
3494 | struct dfs_info3_param *referrals = NULL; | |
3495 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; | |
3496 | ||
3497 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
3498 | if (IS_ERR(full_path)) | |
3499 | return PTR_ERR(full_path); | |
3500 | ||
3501 | /* For DFS paths, skip the first '\' of the UNC */ | |
3502 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; | |
3503 | ||
3504 | rc = get_dfs_path(xid, pSesInfo , ref_path, cifs_sb->local_nls, | |
3505 | &num_referrals, &referrals, | |
3506 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3507 | ||
3508 | if (!rc && num_referrals > 0) { | |
3509 | char *fake_devname = NULL; | |
3510 | ||
3511 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, | |
3512 | full_path + 1, referrals, | |
3513 | &fake_devname); | |
3514 | ||
3515 | free_dfs_info_array(referrals, num_referrals); | |
046462ab | 3516 | |
dd613945 SF |
3517 | if (IS_ERR(mdata)) { |
3518 | rc = PTR_ERR(mdata); | |
3519 | mdata = NULL; | |
b9bce2e9 JL |
3520 | } else { |
3521 | cleanup_volume_info_contents(volume_info); | |
3522 | memset(volume_info, '\0', sizeof(*volume_info)); | |
3523 | rc = cifs_setup_volume_info(volume_info, mdata, | |
3524 | fake_devname); | |
dd613945 | 3525 | } |
b9bce2e9 JL |
3526 | kfree(fake_devname); |
3527 | kfree(cifs_sb->mountdata); | |
046462ab | 3528 | cifs_sb->mountdata = mdata; |
dd613945 SF |
3529 | } |
3530 | kfree(full_path); | |
3531 | return rc; | |
3532 | } | |
2d6d589d | 3533 | #endif |
1bfe73c2 | 3534 | |
04db79b0 JL |
3535 | static int |
3536 | cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, | |
3537 | const char *devname) | |
1da177e4 | 3538 | { |
724d9f1c | 3539 | int rc = 0; |
1da177e4 | 3540 | |
04db79b0 JL |
3541 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) |
3542 | return -EINVAL; | |
1da177e4 | 3543 | |
23db65f5 | 3544 | |
7586b765 | 3545 | if (volume_info->nullauth) { |
04febabc JL |
3546 | cFYI(1, "Anonymous login"); |
3547 | kfree(volume_info->username); | |
3548 | volume_info->username = NULL; | |
7586b765 | 3549 | } else if (volume_info->username) { |
1da177e4 | 3550 | /* BB fixme parse for domain name here */ |
b6b38f70 | 3551 | cFYI(1, "Username: %s", volume_info->username); |
1da177e4 | 3552 | } else { |
bf820679 | 3553 | cifserror("No username specified"); |
50c2f753 SF |
3554 | /* In userspace mount helper we can get user name from alternate |
3555 | locations such as env variables and files on disk */ | |
04db79b0 | 3556 | return -EINVAL; |
1da177e4 LT |
3557 | } |
3558 | ||
1da177e4 | 3559 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 3560 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
3561 | /* load_nls_default cannot return null */ |
3562 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 3563 | } else { |
a5fc4ce0 JL |
3564 | volume_info->local_nls = load_nls(volume_info->iocharset); |
3565 | if (volume_info->local_nls == NULL) { | |
b6b38f70 JP |
3566 | cERROR(1, "CIFS mount error: iocharset %s not found", |
3567 | volume_info->iocharset); | |
04db79b0 | 3568 | return -ELIBACC; |
1da177e4 LT |
3569 | } |
3570 | } | |
724d9f1c | 3571 | |
724d9f1c PS |
3572 | return rc; |
3573 | } | |
3574 | ||
04db79b0 JL |
3575 | struct smb_vol * |
3576 | cifs_get_volume_info(char *mount_data, const char *devname) | |
3577 | { | |
3578 | int rc; | |
3579 | struct smb_vol *volume_info; | |
3580 | ||
3581 | volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL); | |
3582 | if (!volume_info) | |
3583 | return ERR_PTR(-ENOMEM); | |
3584 | ||
3585 | rc = cifs_setup_volume_info(volume_info, mount_data, devname); | |
3586 | if (rc) { | |
3587 | cifs_cleanup_volume_info(volume_info); | |
3588 | volume_info = ERR_PTR(rc); | |
3589 | } | |
3590 | ||
3591 | return volume_info; | |
3592 | } | |
3593 | ||
724d9f1c | 3594 | int |
2c6292ae | 3595 | cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) |
724d9f1c | 3596 | { |
1daaae8f | 3597 | int rc; |
6d5786a3 | 3598 | unsigned int xid; |
96daf2b0 SF |
3599 | struct cifs_ses *pSesInfo; |
3600 | struct cifs_tcon *tcon; | |
724d9f1c PS |
3601 | struct TCP_Server_Info *srvTcp; |
3602 | char *full_path; | |
3603 | struct tcon_link *tlink; | |
3604 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
3605 | int referral_walks_count = 0; | |
20547490 | 3606 | #endif |
dd854466 AV |
3607 | |
3608 | rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); | |
3609 | if (rc) | |
3610 | return rc; | |
3611 | ||
20547490 | 3612 | #ifdef CONFIG_CIFS_DFS_UPCALL |
724d9f1c PS |
3613 | try_mount_again: |
3614 | /* cleanup activities if we're chasing a referral */ | |
3615 | if (referral_walks_count) { | |
3616 | if (tcon) | |
3617 | cifs_put_tcon(tcon); | |
3618 | else if (pSesInfo) | |
3619 | cifs_put_smb_ses(pSesInfo); | |
3620 | ||
6d5786a3 | 3621 | free_xid(xid); |
724d9f1c PS |
3622 | } |
3623 | #endif | |
1daaae8f | 3624 | rc = 0; |
724d9f1c PS |
3625 | tcon = NULL; |
3626 | pSesInfo = NULL; | |
3627 | srvTcp = NULL; | |
3628 | full_path = NULL; | |
3629 | tlink = NULL; | |
3630 | ||
6d5786a3 | 3631 | xid = get_xid(); |
1da177e4 | 3632 | |
63c038c2 | 3633 | /* get a reference to a tcp session */ |
7586b765 | 3634 | srvTcp = cifs_get_tcp_session(volume_info); |
63c038c2 JL |
3635 | if (IS_ERR(srvTcp)) { |
3636 | rc = PTR_ERR(srvTcp); | |
dd854466 | 3637 | bdi_destroy(&cifs_sb->bdi); |
63c038c2 | 3638 | goto out; |
1da177e4 LT |
3639 | } |
3640 | ||
36988c76 JL |
3641 | /* get a reference to a SMB session */ |
3642 | pSesInfo = cifs_get_smb_ses(srvTcp, volume_info); | |
3643 | if (IS_ERR(pSesInfo)) { | |
3644 | rc = PTR_ERR(pSesInfo); | |
3645 | pSesInfo = NULL; | |
3646 | goto mount_fail_check; | |
1da177e4 | 3647 | } |
50c2f753 | 3648 | |
d00c28de JL |
3649 | /* search for existing tcon to this server share */ |
3650 | tcon = cifs_get_tcon(pSesInfo, volume_info); | |
3651 | if (IS_ERR(tcon)) { | |
3652 | rc = PTR_ERR(tcon); | |
3653 | tcon = NULL; | |
1bfe73c2 | 3654 | goto remote_path_check; |
d00c28de | 3655 | } |
1bfe73c2 | 3656 | |
d82c2df5 | 3657 | /* tell server which Unix caps we support */ |
6848b733 | 3658 | if (tcon->ses->capabilities & CAP_UNIX) { |
d82c2df5 SF |
3659 | /* reset of caps checks mount to see if unix extensions |
3660 | disabled for just this mount */ | |
2c6292ae | 3661 | reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info); |
6848b733 SF |
3662 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && |
3663 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & | |
3664 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) { | |
3665 | rc = -EACCES; | |
3666 | goto mount_fail_check; | |
3667 | } | |
3668 | } else | |
d82c2df5 | 3669 | tcon->unix_ext = 0; /* server does not support them */ |
c18c842b | 3670 | |
6848b733 SF |
3671 | /* do not care if following two calls succeed - informational */ |
3672 | if (!tcon->ipc) { | |
3673 | CIFSSMBQFSDeviceInfo(xid, tcon); | |
3674 | CIFSSMBQFSAttributeInfo(xid, tcon); | |
3675 | } | |
3676 | ||
f7910cbd | 3677 | cifs_sb->wsize = cifs_negotiate_wsize(tcon, volume_info); |
5eba8ab3 | 3678 | cifs_sb->rsize = cifs_negotiate_rsize(tcon, volume_info); |
f7910cbd | 3679 | |
66bfaadc | 3680 | /* tune readahead according to rsize */ |
8f71465c | 3681 | cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE; |
f7910cbd | 3682 | |
1bfe73c2 | 3683 | remote_path_check: |
c1508ca2 SF |
3684 | #ifdef CONFIG_CIFS_DFS_UPCALL |
3685 | /* | |
3686 | * Perform an unconditional check for whether there are DFS | |
3687 | * referrals for this path without prefix, to provide support | |
3688 | * for DFS referrals from w2k8 servers which don't seem to respond | |
3689 | * with PATH_NOT_COVERED to requests that include the prefix. | |
3690 | * Chase the referral if found, otherwise continue normally. | |
3691 | */ | |
3692 | if (referral_walks_count == 0) { | |
3693 | int refrc = expand_dfs_referral(xid, pSesInfo, volume_info, | |
046462ab | 3694 | cifs_sb, false); |
c1508ca2 SF |
3695 | if (!refrc) { |
3696 | referral_walks_count++; | |
3697 | goto try_mount_again; | |
3698 | } | |
3699 | } | |
3700 | #endif | |
3701 | ||
f87d39d9 | 3702 | /* check if a whole path is not remote */ |
70945643 | 3703 | if (!rc && tcon) { |
e4cce94c | 3704 | /* build_path_to_root works only when we have a valid tcon */ |
f87d39d9 | 3705 | full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon); |
e4cce94c IM |
3706 | if (full_path == NULL) { |
3707 | rc = -ENOMEM; | |
3708 | goto mount_fail_check; | |
3709 | } | |
3710 | rc = is_path_accessible(xid, tcon, cifs_sb, full_path); | |
03ceace5 | 3711 | if (rc != 0 && rc != -EREMOTE) { |
e4cce94c IM |
3712 | kfree(full_path); |
3713 | goto mount_fail_check; | |
3714 | } | |
3715 | kfree(full_path); | |
3716 | } | |
3717 | ||
1bfe73c2 IM |
3718 | /* get referral if needed */ |
3719 | if (rc == -EREMOTE) { | |
d036f50f | 3720 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
3721 | if (referral_walks_count > MAX_NESTED_LINKS) { |
3722 | /* | |
3723 | * BB: when we implement proper loop detection, | |
3724 | * we will remove this check. But now we need it | |
3725 | * to prevent an indefinite loop if 'DFS tree' is | |
3726 | * misconfigured (i.e. has loops). | |
3727 | */ | |
3728 | rc = -ELOOP; | |
3729 | goto mount_fail_check; | |
3730 | } | |
1bfe73c2 | 3731 | |
dd613945 | 3732 | rc = expand_dfs_referral(xid, pSesInfo, volume_info, cifs_sb, |
046462ab | 3733 | true); |
7b91e266 | 3734 | |
dd613945 | 3735 | if (!rc) { |
5c2503a8 | 3736 | referral_walks_count++; |
1bfe73c2 IM |
3737 | goto try_mount_again; |
3738 | } | |
dd613945 | 3739 | goto mount_fail_check; |
d036f50f SF |
3740 | #else /* No DFS support, return error on mount */ |
3741 | rc = -EOPNOTSUPP; | |
3742 | #endif | |
1bfe73c2 IM |
3743 | } |
3744 | ||
9d002df4 JL |
3745 | if (rc) |
3746 | goto mount_fail_check; | |
3747 | ||
3748 | /* now, hang the tcon off of the superblock */ | |
3749 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); | |
3750 | if (tlink == NULL) { | |
3751 | rc = -ENOMEM; | |
3752 | goto mount_fail_check; | |
3753 | } | |
3754 | ||
b647c35f | 3755 | tlink->tl_uid = pSesInfo->linux_uid; |
9d002df4 JL |
3756 | tlink->tl_tcon = tcon; |
3757 | tlink->tl_time = jiffies; | |
3758 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
3759 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3760 | ||
b647c35f | 3761 | cifs_sb->master_tlink = tlink; |
9d002df4 | 3762 | spin_lock(&cifs_sb->tlink_tree_lock); |
b647c35f | 3763 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
9d002df4 | 3764 | spin_unlock(&cifs_sb->tlink_tree_lock); |
413e661c | 3765 | |
da472fc8 | 3766 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
3767 | TLINK_IDLE_EXPIRE); |
3768 | ||
1bfe73c2 IM |
3769 | mount_fail_check: |
3770 | /* on error free sesinfo and tcon struct if needed */ | |
3771 | if (rc) { | |
1bfe73c2 | 3772 | /* If find_unc succeeded then rc == 0 so we can not end */ |
25985edc | 3773 | /* up accidentally freeing someone elses tcon struct */ |
1bfe73c2 IM |
3774 | if (tcon) |
3775 | cifs_put_tcon(tcon); | |
3776 | else if (pSesInfo) | |
3777 | cifs_put_smb_ses(pSesInfo); | |
3778 | else | |
3779 | cifs_put_tcp_session(srvTcp); | |
dd854466 | 3780 | bdi_destroy(&cifs_sb->bdi); |
1bfe73c2 IM |
3781 | } |
3782 | ||
70fe7dc0 | 3783 | out: |
6d5786a3 | 3784 | free_xid(xid); |
1da177e4 LT |
3785 | return rc; |
3786 | } | |
3787 | ||
8d1bca32 JL |
3788 | /* |
3789 | * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon | |
3790 | * pointer may be NULL. | |
3791 | */ | |
1da177e4 | 3792 | int |
2e6e02ab | 3793 | CIFSTCon(const unsigned int xid, struct cifs_ses *ses, |
96daf2b0 | 3794 | const char *tree, struct cifs_tcon *tcon, |
1da177e4 LT |
3795 | const struct nls_table *nls_codepage) |
3796 | { | |
3797 | struct smb_hdr *smb_buffer; | |
3798 | struct smb_hdr *smb_buffer_response; | |
3799 | TCONX_REQ *pSMB; | |
3800 | TCONX_RSP *pSMBr; | |
3801 | unsigned char *bcc_ptr; | |
3802 | int rc = 0; | |
690c522f JL |
3803 | int length; |
3804 | __u16 bytes_left, count; | |
1da177e4 LT |
3805 | |
3806 | if (ses == NULL) | |
3807 | return -EIO; | |
3808 | ||
3809 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 3810 | if (smb_buffer == NULL) |
1da177e4 | 3811 | return -ENOMEM; |
ca43e3be | 3812 | |
1da177e4 LT |
3813 | smb_buffer_response = smb_buffer; |
3814 | ||
3815 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
3816 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 | 3817 | |
88257360 | 3818 | smb_buffer->Mid = get_next_mid(ses->server); |
1da177e4 LT |
3819 | smb_buffer->Uid = ses->Suid; |
3820 | pSMB = (TCONX_REQ *) smb_buffer; | |
3821 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
3822 | ||
3823 | pSMB->AndXCommand = 0xFF; | |
3824 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 3825 | bcc_ptr = &pSMB->Password[0]; |
8d1bca32 | 3826 | if (!tcon || (ses->server->sec_mode & SECMODE_USER)) { |
eeac8047 | 3827 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 3828 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 3829 | bcc_ptr++; /* skip password */ |
7c7b25bc | 3830 | /* already aligned so no need to do it below */ |
eeac8047 | 3831 | } else { |
540b2e37 | 3832 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
3833 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
3834 | specified as required (when that support is added to | |
3835 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 3836 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
3837 | by Samba (not sure whether other servers allow |
3838 | NTLMv2 password here) */ | |
7c7b25bc | 3839 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 3840 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
00e485b0 | 3841 | (ses->server->secType == LANMAN)) |
d3ba50b1 | 3842 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
96daf2b0 | 3843 | ses->server->sec_mode & |
4e53a3fb JL |
3844 | SECMODE_PW_ENCRYPT ? true : false, |
3845 | bcc_ptr); | |
7c7b25bc SF |
3846 | else |
3847 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 | 3848 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
9ef5992e | 3849 | bcc_ptr, nls_codepage); |
eeac8047 | 3850 | |
540b2e37 | 3851 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 3852 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
3853 | /* must align unicode strings */ |
3854 | *bcc_ptr = 0; /* null byte password */ | |
3855 | bcc_ptr++; | |
3856 | } | |
eeac8047 | 3857 | } |
1da177e4 | 3858 | |
96daf2b0 | 3859 | if (ses->server->sec_mode & |
a878fb22 | 3860 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
1da177e4 LT |
3861 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
3862 | ||
3863 | if (ses->capabilities & CAP_STATUS32) { | |
3864 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
3865 | } | |
3866 | if (ses->capabilities & CAP_DFS) { | |
3867 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
3868 | } | |
3869 | if (ses->capabilities & CAP_UNICODE) { | |
3870 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
3871 | length = | |
acbbb76a | 3872 | cifs_strtoUTF16((__le16 *) bcc_ptr, tree, |
50c2f753 | 3873 | 6 /* max utf8 char length in bytes */ * |
a878fb22 SF |
3874 | (/* server len*/ + 256 /* share len */), nls_codepage); |
3875 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
3876 | bcc_ptr += 2; /* skip trailing null */ |
3877 | } else { /* ASCII */ | |
1da177e4 LT |
3878 | strcpy(bcc_ptr, tree); |
3879 | bcc_ptr += strlen(tree) + 1; | |
3880 | } | |
3881 | strcpy(bcc_ptr, "?????"); | |
3882 | bcc_ptr += strlen("?????"); | |
3883 | bcc_ptr += 1; | |
3884 | count = bcc_ptr - &pSMB->Password[0]; | |
be8e3b00 SF |
3885 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
3886 | pSMB->hdr.smb_buf_length) + count); | |
1da177e4 LT |
3887 | pSMB->ByteCount = cpu_to_le16(count); |
3888 | ||
133672ef | 3889 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 3890 | 0); |
1da177e4 | 3891 | |
1da177e4 LT |
3892 | /* above now done in SendReceive */ |
3893 | if ((rc == 0) && (tcon != NULL)) { | |
0e0d2cf3 SF |
3894 | bool is_unicode; |
3895 | ||
1da177e4 | 3896 | tcon->tidStatus = CifsGood; |
3b795210 | 3897 | tcon->need_reconnect = false; |
1da177e4 LT |
3898 | tcon->tid = smb_buffer_response->Tid; |
3899 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 3900 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 3901 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
3902 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
3903 | is_unicode = true; | |
3904 | else | |
3905 | is_unicode = false; | |
3906 | ||
cc20c031 | 3907 | |
50c2f753 | 3908 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
3909 | if (length == 3) { |
3910 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
3911 | (bcc_ptr[2] == 'C')) { | |
b6b38f70 | 3912 | cFYI(1, "IPC connection"); |
7f8ed420 SF |
3913 | tcon->ipc = 1; |
3914 | } | |
3915 | } else if (length == 2) { | |
3916 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
3917 | /* the most common case */ | |
b6b38f70 | 3918 | cFYI(1, "disk share connection"); |
7f8ed420 SF |
3919 | } |
3920 | } | |
50c2f753 | 3921 | bcc_ptr += length + 1; |
cc20c031 | 3922 | bytes_left -= (length + 1); |
1da177e4 | 3923 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); |
cc20c031 JL |
3924 | |
3925 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 3926 | kfree(tcon->nativeFileSystem); |
acbbb76a | 3927 | tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr, |
0e0d2cf3 | 3928 | bytes_left, is_unicode, |
cc20c031 JL |
3929 | nls_codepage); |
3930 | ||
b6b38f70 | 3931 | cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem); |
cc20c031 | 3932 | |
fb8c4b14 | 3933 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
3934 | (smb_buffer_response->WordCount == 7)) |
3935 | /* field is in same location */ | |
3979877e SF |
3936 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
3937 | else | |
3938 | tcon->Flags = 0; | |
b6b38f70 | 3939 | cFYI(1, "Tcon flags: 0x%x ", tcon->Flags); |
1da177e4 | 3940 | } else if ((rc == 0) && tcon == NULL) { |
50c2f753 | 3941 | /* all we need to save for IPC$ connection */ |
1da177e4 LT |
3942 | ses->ipc_tid = smb_buffer_response->Tid; |
3943 | } | |
3944 | ||
a8a11d39 | 3945 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
3946 | return rc; |
3947 | } | |
3948 | ||
2a9b9951 AV |
3949 | void |
3950 | cifs_umount(struct cifs_sb_info *cifs_sb) | |
1da177e4 | 3951 | { |
b647c35f JL |
3952 | struct rb_root *root = &cifs_sb->tlink_tree; |
3953 | struct rb_node *node; | |
3954 | struct tcon_link *tlink; | |
9d002df4 | 3955 | |
2de970ff JL |
3956 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
3957 | ||
b647c35f JL |
3958 | spin_lock(&cifs_sb->tlink_tree_lock); |
3959 | while ((node = rb_first(root))) { | |
3960 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3961 | cifs_get_tlink(tlink); | |
3962 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3963 | rb_erase(node, root); | |
1da177e4 | 3964 | |
b647c35f JL |
3965 | spin_unlock(&cifs_sb->tlink_tree_lock); |
3966 | cifs_put_tlink(tlink); | |
3967 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3968 | } | |
3969 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 3970 | |
dd854466 | 3971 | bdi_destroy(&cifs_sb->bdi); |
d757d71b AV |
3972 | kfree(cifs_sb->mountdata); |
3973 | unload_nls(cifs_sb->local_nls); | |
3974 | kfree(cifs_sb); | |
50c2f753 | 3975 | } |
1da177e4 | 3976 | |
286170aa PS |
3977 | int |
3978 | cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses) | |
1da177e4 LT |
3979 | { |
3980 | int rc = 0; | |
198b5682 | 3981 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 3982 | |
286170aa PS |
3983 | if (!server->ops->need_neg || !server->ops->negotiate) |
3984 | return -ENOSYS; | |
3985 | ||
198b5682 | 3986 | /* only send once per connect */ |
286170aa | 3987 | if (!server->ops->need_neg(server)) |
198b5682 JL |
3988 | return 0; |
3989 | ||
45275789 | 3990 | set_credits(server, 1); |
286170aa PS |
3991 | |
3992 | rc = server->ops->negotiate(xid, ses); | |
198b5682 JL |
3993 | if (rc == 0) { |
3994 | spin_lock(&GlobalMid_Lock); | |
7fdbaa1b | 3995 | if (server->tcpStatus == CifsNeedNegotiate) |
198b5682 JL |
3996 | server->tcpStatus = CifsGood; |
3997 | else | |
3998 | rc = -EHOSTDOWN; | |
3999 | spin_unlock(&GlobalMid_Lock); | |
198b5682 JL |
4000 | } |
4001 | ||
4002 | return rc; | |
4003 | } | |
4004 | ||
58c45c58 PS |
4005 | int |
4006 | cifs_setup_session(const unsigned int xid, struct cifs_ses *ses, | |
4007 | struct nls_table *nls_info) | |
198b5682 | 4008 | { |
58c45c58 | 4009 | int rc = -ENOSYS; |
198b5682 | 4010 | struct TCP_Server_Info *server = ses->server; |
26b994fa | 4011 | |
198b5682 JL |
4012 | ses->flags = 0; |
4013 | ses->capabilities = server->capabilities; | |
26b994fa | 4014 | if (linuxExtEnabled == 0) |
198b5682 | 4015 | ses->capabilities &= (~CAP_UNIX); |
20418acd | 4016 | |
b6b38f70 | 4017 | cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d", |
96daf2b0 | 4018 | server->sec_mode, server->capabilities, server->timeAdj); |
cb7691b6 | 4019 | |
58c45c58 PS |
4020 | if (server->ops->sess_setup) |
4021 | rc = server->ops->sess_setup(xid, ses, nls_info); | |
4022 | ||
26b994fa | 4023 | if (rc) { |
b6b38f70 | 4024 | cERROR(1, "Send error in SessSetup = %d", rc); |
26b994fa | 4025 | } else { |
5d0d2882 SP |
4026 | mutex_lock(&ses->server->srv_mutex); |
4027 | if (!server->session_estab) { | |
21e73393 | 4028 | server->session_key.response = ses->auth_key.response; |
5d0d2882 | 4029 | server->session_key.len = ses->auth_key.len; |
21e73393 SP |
4030 | server->sequence_number = 0x2; |
4031 | server->session_estab = true; | |
4032 | ses->auth_key.response = NULL; | |
5d0d2882 SP |
4033 | } |
4034 | mutex_unlock(&server->srv_mutex); | |
4035 | ||
b6b38f70 | 4036 | cFYI(1, "CIFS Session Established successfully"); |
20418acd | 4037 | spin_lock(&GlobalMid_Lock); |
198b5682 JL |
4038 | ses->status = CifsGood; |
4039 | ses->need_reconnect = false; | |
20418acd | 4040 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 4041 | } |
26b994fa | 4042 | |
21e73393 SP |
4043 | kfree(ses->auth_key.response); |
4044 | ses->auth_key.response = NULL; | |
4045 | ses->auth_key.len = 0; | |
d3686d54 SP |
4046 | kfree(ses->ntlmssp); |
4047 | ses->ntlmssp = NULL; | |
21e73393 | 4048 | |
1da177e4 LT |
4049 | return rc; |
4050 | } | |
4051 | ||
8a8798a5 JL |
4052 | static int |
4053 | cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses) | |
4054 | { | |
4055 | switch (ses->server->secType) { | |
4056 | case Kerberos: | |
4057 | vol->secFlg = CIFSSEC_MUST_KRB5; | |
4058 | return 0; | |
4059 | case NTLMv2: | |
4060 | vol->secFlg = CIFSSEC_MUST_NTLMV2; | |
4061 | break; | |
4062 | case NTLM: | |
4063 | vol->secFlg = CIFSSEC_MUST_NTLM; | |
4064 | break; | |
4065 | case RawNTLMSSP: | |
4066 | vol->secFlg = CIFSSEC_MUST_NTLMSSP; | |
4067 | break; | |
4068 | case LANMAN: | |
4069 | vol->secFlg = CIFSSEC_MUST_LANMAN; | |
4070 | break; | |
4071 | } | |
4072 | ||
4073 | return cifs_set_cifscreds(vol, ses); | |
4074 | } | |
4075 | ||
96daf2b0 | 4076 | static struct cifs_tcon * |
9d002df4 JL |
4077 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid) |
4078 | { | |
8a8798a5 | 4079 | int rc; |
96daf2b0 SF |
4080 | struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); |
4081 | struct cifs_ses *ses; | |
4082 | struct cifs_tcon *tcon = NULL; | |
9d002df4 | 4083 | struct smb_vol *vol_info; |
9d002df4 JL |
4084 | |
4085 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
803ab977 DC |
4086 | if (vol_info == NULL) |
4087 | return ERR_PTR(-ENOMEM); | |
9d002df4 | 4088 | |
9d002df4 JL |
4089 | vol_info->local_nls = cifs_sb->local_nls; |
4090 | vol_info->linux_uid = fsuid; | |
4091 | vol_info->cred_uid = fsuid; | |
4092 | vol_info->UNC = master_tcon->treeName; | |
4093 | vol_info->retry = master_tcon->retry; | |
4094 | vol_info->nocase = master_tcon->nocase; | |
4095 | vol_info->local_lease = master_tcon->local_lease; | |
4096 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
4097 | ||
8a8798a5 JL |
4098 | rc = cifs_set_vol_auth(vol_info, master_tcon->ses); |
4099 | if (rc) { | |
4100 | tcon = ERR_PTR(rc); | |
4101 | goto out; | |
4102 | } | |
9d002df4 JL |
4103 | |
4104 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 4105 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 4106 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 4107 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
4108 | |
4109 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
4110 | if (IS_ERR(ses)) { | |
96daf2b0 | 4111 | tcon = (struct cifs_tcon *)ses; |
9d002df4 JL |
4112 | cifs_put_tcp_session(master_tcon->ses->server); |
4113 | goto out; | |
4114 | } | |
4115 | ||
4116 | tcon = cifs_get_tcon(ses, vol_info); | |
4117 | if (IS_ERR(tcon)) { | |
4118 | cifs_put_smb_ses(ses); | |
4119 | goto out; | |
4120 | } | |
4121 | ||
4122 | if (ses->capabilities & CAP_UNIX) | |
4123 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); | |
4124 | out: | |
8a8798a5 JL |
4125 | kfree(vol_info->username); |
4126 | kfree(vol_info->password); | |
9d002df4 JL |
4127 | kfree(vol_info); |
4128 | ||
4129 | return tcon; | |
4130 | } | |
4131 | ||
96daf2b0 | 4132 | struct cifs_tcon * |
9d002df4 JL |
4133 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) |
4134 | { | |
4135 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
4136 | } | |
4137 | ||
4138 | static int | |
4139 | cifs_sb_tcon_pending_wait(void *unused) | |
4140 | { | |
4141 | schedule(); | |
4142 | return signal_pending(current) ? -ERESTARTSYS : 0; | |
4143 | } | |
4144 | ||
b647c35f JL |
4145 | /* find and return a tlink with given uid */ |
4146 | static struct tcon_link * | |
4147 | tlink_rb_search(struct rb_root *root, uid_t uid) | |
4148 | { | |
4149 | struct rb_node *node = root->rb_node; | |
4150 | struct tcon_link *tlink; | |
4151 | ||
4152 | while (node) { | |
4153 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
4154 | ||
4155 | if (tlink->tl_uid > uid) | |
4156 | node = node->rb_left; | |
4157 | else if (tlink->tl_uid < uid) | |
4158 | node = node->rb_right; | |
4159 | else | |
4160 | return tlink; | |
4161 | } | |
4162 | return NULL; | |
4163 | } | |
4164 | ||
4165 | /* insert a tcon_link into the tree */ | |
4166 | static void | |
4167 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
4168 | { | |
4169 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
4170 | struct tcon_link *tlink; | |
4171 | ||
4172 | while (*new) { | |
4173 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
4174 | parent = *new; | |
4175 | ||
4176 | if (tlink->tl_uid > new_tlink->tl_uid) | |
4177 | new = &((*new)->rb_left); | |
4178 | else | |
4179 | new = &((*new)->rb_right); | |
4180 | } | |
4181 | ||
4182 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
4183 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
4184 | } | |
4185 | ||
9d002df4 JL |
4186 | /* |
4187 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
4188 | * current task. | |
4189 | * | |
4190 | * If the superblock doesn't refer to a multiuser mount, then just return | |
4191 | * the master tcon for the mount. | |
4192 | * | |
6ef933a3 | 4193 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
4194 | * exists, then check to see if it's pending construction. If it is then wait |
4195 | * for construction to complete. Once it's no longer pending, check to see if | |
4196 | * it failed and either return an error or retry construction, depending on | |
4197 | * the timeout. | |
4198 | * | |
4199 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
4200 | * try to construct a new one. | |
4201 | */ | |
4202 | struct tcon_link * | |
4203 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
4204 | { | |
4205 | int ret; | |
b647c35f | 4206 | uid_t fsuid = current_fsuid(); |
9d002df4 JL |
4207 | struct tcon_link *tlink, *newtlink; |
4208 | ||
4209 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
4210 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
4211 | ||
4212 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 4213 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4214 | if (tlink) |
4215 | cifs_get_tlink(tlink); | |
4216 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4217 | ||
4218 | if (tlink == NULL) { | |
4219 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
4220 | if (newtlink == NULL) | |
4221 | return ERR_PTR(-ENOMEM); | |
b647c35f | 4222 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
4223 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
4224 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
4225 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
4226 | cifs_get_tlink(newtlink); | |
4227 | ||
9d002df4 JL |
4228 | spin_lock(&cifs_sb->tlink_tree_lock); |
4229 | /* was one inserted after previous search? */ | |
b647c35f | 4230 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4231 | if (tlink) { |
4232 | cifs_get_tlink(tlink); | |
4233 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4234 | kfree(newtlink); |
4235 | goto wait_for_construction; | |
4236 | } | |
9d002df4 | 4237 | tlink = newtlink; |
b647c35f JL |
4238 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
4239 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4240 | } else { |
4241 | wait_for_construction: | |
4242 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
4243 | cifs_sb_tcon_pending_wait, | |
4244 | TASK_INTERRUPTIBLE); | |
4245 | if (ret) { | |
4246 | cifs_put_tlink(tlink); | |
4247 | return ERR_PTR(ret); | |
4248 | } | |
4249 | ||
4250 | /* if it's good, return it */ | |
4251 | if (!IS_ERR(tlink->tl_tcon)) | |
4252 | return tlink; | |
4253 | ||
4254 | /* return error if we tried this already recently */ | |
4255 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
4256 | cifs_put_tlink(tlink); | |
4257 | return ERR_PTR(-EACCES); | |
4258 | } | |
4259 | ||
4260 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
4261 | goto wait_for_construction; | |
4262 | } | |
4263 | ||
4264 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
4265 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
4266 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
4267 | ||
4268 | if (IS_ERR(tlink->tl_tcon)) { | |
4269 | cifs_put_tlink(tlink); | |
4270 | return ERR_PTR(-EACCES); | |
4271 | } | |
4272 | ||
4273 | return tlink; | |
4274 | } | |
2de970ff JL |
4275 | |
4276 | /* | |
4277 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
4278 | * out tcons. | |
4279 | */ | |
4280 | static void | |
4281 | cifs_prune_tlinks(struct work_struct *work) | |
4282 | { | |
4283 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
4284 | prune_tlinks.work); | |
b647c35f JL |
4285 | struct rb_root *root = &cifs_sb->tlink_tree; |
4286 | struct rb_node *node = rb_first(root); | |
4287 | struct rb_node *tmp; | |
4288 | struct tcon_link *tlink; | |
2de970ff | 4289 | |
b647c35f JL |
4290 | /* |
4291 | * Because we drop the spinlock in the loop in order to put the tlink | |
4292 | * it's not guarded against removal of links from the tree. The only | |
4293 | * places that remove entries from the tree are this function and | |
4294 | * umounts. Because this function is non-reentrant and is canceled | |
4295 | * before umount can proceed, this is safe. | |
4296 | */ | |
4297 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4298 | node = rb_first(root); | |
4299 | while (node != NULL) { | |
4300 | tmp = node; | |
4301 | node = rb_next(tmp); | |
4302 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
4303 | ||
4304 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
4305 | atomic_read(&tlink->tl_count) != 0 || | |
4306 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
4307 | continue; | |
2de970ff | 4308 | |
b647c35f JL |
4309 | cifs_get_tlink(tlink); |
4310 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4311 | rb_erase(tmp, root); | |
4312 | ||
4313 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4314 | cifs_put_tlink(tlink); | |
4315 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4316 | } | |
4317 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff | 4318 | |
da472fc8 | 4319 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
4320 | TLINK_IDLE_EXPIRE); |
4321 | } |