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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 | ||
1da177e4 LT |
59 | extern mempool_t *cifs_req_poolp; |
60 | ||
2de970ff | 61 | /* FIXME: should these be tunable? */ |
9d002df4 | 62 | #define TLINK_ERROR_EXPIRE (1 * HZ) |
2de970ff | 63 | #define TLINK_IDLE_EXPIRE (600 * HZ) |
9d002df4 | 64 | |
8830d7e0 SP |
65 | enum { |
66 | ||
67 | /* Mount options that take no arguments */ | |
68 | Opt_user_xattr, Opt_nouser_xattr, | |
69 | Opt_forceuid, Opt_noforceuid, | |
70 | Opt_noblocksend, Opt_noautotune, | |
71 | Opt_hard, Opt_soft, Opt_perm, Opt_noperm, | |
72 | Opt_mapchars, Opt_nomapchars, Opt_sfu, | |
73 | Opt_nosfu, Opt_nodfs, Opt_posixpaths, | |
74 | Opt_noposixpaths, Opt_nounix, | |
75 | Opt_nocase, | |
76 | Opt_brl, Opt_nobrl, | |
77 | Opt_forcemandatorylock, Opt_setuids, | |
78 | Opt_nosetuids, Opt_dynperm, Opt_nodynperm, | |
79 | Opt_nohard, Opt_nosoft, | |
80 | Opt_nointr, Opt_intr, | |
81 | Opt_nostrictsync, Opt_strictsync, | |
82 | Opt_serverino, Opt_noserverino, | |
83 | Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl, | |
84 | Opt_acl, Opt_noacl, Opt_locallease, | |
85 | Opt_sign, Opt_seal, Opt_direct, | |
86 | Opt_strictcache, Opt_noac, | |
87 | Opt_fsc, Opt_mfsymlinks, | |
d8162558 | 88 | Opt_multiuser, Opt_sloppy, |
8830d7e0 SP |
89 | |
90 | /* Mount options which take numeric value */ | |
91 | Opt_backupuid, Opt_backupgid, Opt_uid, | |
92 | Opt_cruid, Opt_gid, Opt_file_mode, | |
93 | Opt_dirmode, Opt_port, | |
94 | Opt_rsize, Opt_wsize, Opt_actimeo, | |
95 | ||
96 | /* Mount options which take string value */ | |
97 | Opt_user, Opt_pass, Opt_ip, | |
98 | Opt_unc, Opt_domain, | |
99 | Opt_srcaddr, Opt_prefixpath, | |
100 | Opt_iocharset, Opt_sockopt, | |
101 | Opt_netbiosname, Opt_servern, | |
23db65f5 | 102 | Opt_ver, Opt_vers, Opt_sec, Opt_cache, |
8830d7e0 SP |
103 | |
104 | /* Mount options to be ignored */ | |
105 | Opt_ignore, | |
106 | ||
107 | /* Options which could be blank */ | |
108 | Opt_blank_pass, | |
4fe9e963 SP |
109 | Opt_blank_user, |
110 | Opt_blank_ip, | |
8830d7e0 SP |
111 | |
112 | Opt_err | |
113 | }; | |
114 | ||
115 | static const match_table_t cifs_mount_option_tokens = { | |
116 | ||
117 | { Opt_user_xattr, "user_xattr" }, | |
118 | { Opt_nouser_xattr, "nouser_xattr" }, | |
119 | { Opt_forceuid, "forceuid" }, | |
120 | { Opt_noforceuid, "noforceuid" }, | |
121 | { Opt_noblocksend, "noblocksend" }, | |
122 | { Opt_noautotune, "noautotune" }, | |
123 | { Opt_hard, "hard" }, | |
124 | { Opt_soft, "soft" }, | |
125 | { Opt_perm, "perm" }, | |
126 | { Opt_noperm, "noperm" }, | |
127 | { Opt_mapchars, "mapchars" }, | |
128 | { Opt_nomapchars, "nomapchars" }, | |
129 | { Opt_sfu, "sfu" }, | |
130 | { Opt_nosfu, "nosfu" }, | |
131 | { Opt_nodfs, "nodfs" }, | |
132 | { Opt_posixpaths, "posixpaths" }, | |
133 | { Opt_noposixpaths, "noposixpaths" }, | |
134 | { Opt_nounix, "nounix" }, | |
135 | { Opt_nounix, "nolinux" }, | |
136 | { Opt_nocase, "nocase" }, | |
137 | { Opt_nocase, "ignorecase" }, | |
138 | { Opt_brl, "brl" }, | |
139 | { Opt_nobrl, "nobrl" }, | |
140 | { Opt_nobrl, "nolock" }, | |
141 | { Opt_forcemandatorylock, "forcemandatorylock" }, | |
5cfdddcf | 142 | { Opt_forcemandatorylock, "forcemand" }, |
8830d7e0 SP |
143 | { Opt_setuids, "setuids" }, |
144 | { Opt_nosetuids, "nosetuids" }, | |
145 | { Opt_dynperm, "dynperm" }, | |
146 | { Opt_nodynperm, "nodynperm" }, | |
147 | { Opt_nohard, "nohard" }, | |
148 | { Opt_nosoft, "nosoft" }, | |
149 | { Opt_nointr, "nointr" }, | |
150 | { Opt_intr, "intr" }, | |
151 | { Opt_nostrictsync, "nostrictsync" }, | |
152 | { Opt_strictsync, "strictsync" }, | |
153 | { Opt_serverino, "serverino" }, | |
154 | { Opt_noserverino, "noserverino" }, | |
155 | { Opt_rwpidforward, "rwpidforward" }, | |
156 | { Opt_cifsacl, "cifsacl" }, | |
157 | { Opt_nocifsacl, "nocifsacl" }, | |
158 | { Opt_acl, "acl" }, | |
159 | { Opt_noacl, "noacl" }, | |
160 | { Opt_locallease, "locallease" }, | |
161 | { Opt_sign, "sign" }, | |
162 | { Opt_seal, "seal" }, | |
163 | { Opt_direct, "direct" }, | |
531c8ff0 JL |
164 | { Opt_direct, "directio" }, |
165 | { Opt_direct, "forcedirectio" }, | |
8830d7e0 SP |
166 | { Opt_strictcache, "strictcache" }, |
167 | { Opt_noac, "noac" }, | |
168 | { Opt_fsc, "fsc" }, | |
169 | { Opt_mfsymlinks, "mfsymlinks" }, | |
170 | { Opt_multiuser, "multiuser" }, | |
d8162558 | 171 | { Opt_sloppy, "sloppy" }, |
8830d7e0 SP |
172 | |
173 | { Opt_backupuid, "backupuid=%s" }, | |
174 | { Opt_backupgid, "backupgid=%s" }, | |
175 | { Opt_uid, "uid=%s" }, | |
176 | { Opt_cruid, "cruid=%s" }, | |
177 | { Opt_gid, "gid=%s" }, | |
178 | { Opt_file_mode, "file_mode=%s" }, | |
179 | { Opt_dirmode, "dirmode=%s" }, | |
180 | { Opt_dirmode, "dir_mode=%s" }, | |
181 | { Opt_port, "port=%s" }, | |
182 | { Opt_rsize, "rsize=%s" }, | |
183 | { Opt_wsize, "wsize=%s" }, | |
184 | { Opt_actimeo, "actimeo=%s" }, | |
185 | ||
4fe9e963 SP |
186 | { Opt_blank_user, "user=" }, |
187 | { Opt_blank_user, "username=" }, | |
8830d7e0 SP |
188 | { Opt_user, "user=%s" }, |
189 | { Opt_user, "username=%s" }, | |
190 | { Opt_blank_pass, "pass=" }, | |
191 | { Opt_pass, "pass=%s" }, | |
192 | { Opt_pass, "password=%s" }, | |
4fe9e963 SP |
193 | { Opt_blank_ip, "ip=" }, |
194 | { Opt_blank_ip, "addr=" }, | |
8830d7e0 SP |
195 | { Opt_ip, "ip=%s" }, |
196 | { Opt_ip, "addr=%s" }, | |
197 | { Opt_unc, "unc=%s" }, | |
198 | { Opt_unc, "target=%s" }, | |
199 | { Opt_unc, "path=%s" }, | |
200 | { Opt_domain, "dom=%s" }, | |
201 | { Opt_domain, "domain=%s" }, | |
202 | { Opt_domain, "workgroup=%s" }, | |
203 | { Opt_srcaddr, "srcaddr=%s" }, | |
204 | { Opt_prefixpath, "prefixpath=%s" }, | |
205 | { Opt_iocharset, "iocharset=%s" }, | |
206 | { Opt_sockopt, "sockopt=%s" }, | |
207 | { Opt_netbiosname, "netbiosname=%s" }, | |
208 | { Opt_servern, "servern=%s" }, | |
209 | { Opt_ver, "ver=%s" }, | |
23db65f5 | 210 | { Opt_vers, "vers=%s" }, |
8830d7e0 | 211 | { Opt_sec, "sec=%s" }, |
15b6a473 | 212 | { Opt_cache, "cache=%s" }, |
8830d7e0 SP |
213 | |
214 | { Opt_ignore, "cred" }, | |
215 | { Opt_ignore, "credentials" }, | |
a557b976 JL |
216 | { Opt_ignore, "cred=%s" }, |
217 | { Opt_ignore, "credentials=%s" }, | |
8830d7e0 SP |
218 | { Opt_ignore, "guest" }, |
219 | { Opt_ignore, "rw" }, | |
220 | { Opt_ignore, "ro" }, | |
221 | { Opt_ignore, "suid" }, | |
222 | { Opt_ignore, "nosuid" }, | |
223 | { Opt_ignore, "exec" }, | |
224 | { Opt_ignore, "noexec" }, | |
225 | { Opt_ignore, "nodev" }, | |
226 | { Opt_ignore, "noauto" }, | |
227 | { Opt_ignore, "dev" }, | |
228 | { Opt_ignore, "mand" }, | |
229 | { Opt_ignore, "nomand" }, | |
230 | { Opt_ignore, "_netdev" }, | |
231 | ||
232 | { Opt_err, NULL } | |
233 | }; | |
234 | ||
235 | enum { | |
236 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
237 | Opt_sec_ntlmsspi, Opt_sec_ntlmssp, | |
7659624f JL |
238 | Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2, |
239 | Opt_sec_ntlmv2i, Opt_sec_lanman, | |
8830d7e0 SP |
240 | Opt_sec_none, |
241 | ||
242 | Opt_sec_err | |
243 | }; | |
244 | ||
245 | static const match_table_t cifs_secflavor_tokens = { | |
246 | { Opt_sec_krb5, "krb5" }, | |
247 | { Opt_sec_krb5i, "krb5i" }, | |
248 | { Opt_sec_krb5p, "krb5p" }, | |
249 | { Opt_sec_ntlmsspi, "ntlmsspi" }, | |
250 | { Opt_sec_ntlmssp, "ntlmssp" }, | |
251 | { Opt_ntlm, "ntlm" }, | |
252 | { Opt_sec_ntlmi, "ntlmi" }, | |
7659624f JL |
253 | { Opt_sec_ntlmv2, "nontlm" }, |
254 | { Opt_sec_ntlmv2, "ntlmv2" }, | |
8830d7e0 | 255 | { Opt_sec_ntlmv2i, "ntlmv2i" }, |
8830d7e0 SP |
256 | { Opt_sec_lanman, "lanman" }, |
257 | { Opt_sec_none, "none" }, | |
258 | ||
259 | { Opt_sec_err, NULL } | |
260 | }; | |
261 | ||
15b6a473 JL |
262 | /* cache flavors */ |
263 | enum { | |
264 | Opt_cache_loose, | |
265 | Opt_cache_strict, | |
266 | Opt_cache_none, | |
267 | Opt_cache_err | |
268 | }; | |
269 | ||
270 | static const match_table_t cifs_cacheflavor_tokens = { | |
271 | { Opt_cache_loose, "loose" }, | |
272 | { Opt_cache_strict, "strict" }, | |
273 | { Opt_cache_none, "none" }, | |
274 | { Opt_cache_err, NULL } | |
275 | }; | |
276 | ||
23db65f5 JL |
277 | static const match_table_t cifs_smb_version_tokens = { |
278 | { Smb_1, SMB1_VERSION_STRING }, | |
1080ef75 | 279 | { Smb_21, SMB21_VERSION_STRING }, |
23db65f5 JL |
280 | }; |
281 | ||
a9f1b85e PS |
282 | static int ip_connect(struct TCP_Server_Info *server); |
283 | static int generic_ip_connect(struct TCP_Server_Info *server); | |
b647c35f | 284 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
2de970ff | 285 | static void cifs_prune_tlinks(struct work_struct *work); |
b9bce2e9 JL |
286 | static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
287 | const char *devname); | |
1da177e4 | 288 | |
d5c5605c JL |
289 | /* |
290 | * cifs tcp session reconnection | |
291 | * | |
292 | * mark tcp session as reconnecting so temporarily locked | |
293 | * mark all smb sessions as reconnecting for tcp session | |
294 | * reconnect tcp session | |
295 | * wake up waiters on reconnection? - (not needed currently) | |
296 | */ | |
28ea5290 | 297 | int |
1da177e4 LT |
298 | cifs_reconnect(struct TCP_Server_Info *server) |
299 | { | |
300 | int rc = 0; | |
f1987b44 | 301 | struct list_head *tmp, *tmp2; |
96daf2b0 SF |
302 | struct cifs_ses *ses; |
303 | struct cifs_tcon *tcon; | |
fb8c4b14 | 304 | struct mid_q_entry *mid_entry; |
3c1105df | 305 | struct list_head retry_list; |
50c2f753 | 306 | |
1da177e4 | 307 | spin_lock(&GlobalMid_Lock); |
469ee614 | 308 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 309 | /* the demux thread will exit normally |
1da177e4 LT |
310 | next time through the loop */ |
311 | spin_unlock(&GlobalMid_Lock); | |
312 | return rc; | |
313 | } else | |
314 | server->tcpStatus = CifsNeedReconnect; | |
315 | spin_unlock(&GlobalMid_Lock); | |
316 | server->maxBuf = 0; | |
aa24d1e9 PS |
317 | #ifdef CONFIG_CIFS_SMB2 |
318 | server->max_read = 0; | |
319 | #endif | |
1da177e4 | 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 | /* |
f6d76178 PS |
406 | * We cannot send an echo if it is disabled or until the |
407 | * NEGOTIATE_PROTOCOL request is done, which is indicated by | |
408 | * server->ops->need_neg() == true. Also, no need to ping if | |
409 | * we got a response recently. | |
247ec9b4 | 410 | */ |
286170aa | 411 | if (!server->ops->need_neg || server->ops->need_neg(server) || |
f6d76178 | 412 | (server->ops->can_echo && !server->ops->can_echo(server)) || |
247ec9b4 | 413 | time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ)) |
c74093b6 JL |
414 | goto requeue_echo; |
415 | ||
f6d76178 | 416 | rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS; |
c74093b6 JL |
417 | if (rc) |
418 | cFYI(1, "Unable to send echo request to server: %s", | |
419 | server->hostname); | |
420 | ||
421 | requeue_echo: | |
da472fc8 | 422 | queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL); |
c74093b6 JL |
423 | } |
424 | ||
3d9c2472 | 425 | static bool |
2a37ef94 | 426 | allocate_buffers(struct TCP_Server_Info *server) |
3d9c2472 | 427 | { |
2a37ef94 JL |
428 | if (!server->bigbuf) { |
429 | server->bigbuf = (char *)cifs_buf_get(); | |
430 | if (!server->bigbuf) { | |
3d9c2472 PS |
431 | cERROR(1, "No memory for large SMB response"); |
432 | msleep(3000); | |
433 | /* retry will check if exiting */ | |
434 | return false; | |
435 | } | |
2a37ef94 | 436 | } else if (server->large_buf) { |
3d9c2472 | 437 | /* we are reusing a dirty large buf, clear its start */ |
1887f601 | 438 | memset(server->bigbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
439 | } |
440 | ||
2a37ef94 JL |
441 | if (!server->smallbuf) { |
442 | server->smallbuf = (char *)cifs_small_buf_get(); | |
443 | if (!server->smallbuf) { | |
3d9c2472 PS |
444 | cERROR(1, "No memory for SMB response"); |
445 | msleep(1000); | |
446 | /* retry will check if exiting */ | |
447 | return false; | |
448 | } | |
449 | /* beginning of smb buffer is cleared in our buf_get */ | |
450 | } else { | |
451 | /* if existing small buf clear beginning */ | |
1887f601 | 452 | memset(server->smallbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
453 | } |
454 | ||
3d9c2472 PS |
455 | return true; |
456 | } | |
457 | ||
ba749e6d JL |
458 | static bool |
459 | server_unresponsive(struct TCP_Server_Info *server) | |
460 | { | |
6dae51a5 PS |
461 | /* |
462 | * We need to wait 2 echo intervals to make sure we handle such | |
463 | * situations right: | |
464 | * 1s client sends a normal SMB request | |
465 | * 2s client gets a response | |
466 | * 30s echo workqueue job pops, and decides we got a response recently | |
467 | * and don't need to send another | |
468 | * ... | |
469 | * 65s kernel_recvmsg times out, and we see that we haven't gotten | |
470 | * a response in >60s. | |
471 | */ | |
472 | if (server->tcpStatus == CifsGood && | |
473 | time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) { | |
ba749e6d JL |
474 | cERROR(1, "Server %s has not responded in %d seconds. " |
475 | "Reconnecting...", server->hostname, | |
6dae51a5 | 476 | (2 * SMB_ECHO_INTERVAL) / HZ); |
ba749e6d JL |
477 | cifs_reconnect(server); |
478 | wake_up(&server->response_q); | |
479 | return true; | |
480 | } | |
481 | ||
482 | return false; | |
483 | } | |
484 | ||
42c4dfc2 JL |
485 | /* |
486 | * kvec_array_init - clone a kvec array, and advance into it | |
487 | * @new: pointer to memory for cloned array | |
488 | * @iov: pointer to original array | |
489 | * @nr_segs: number of members in original array | |
490 | * @bytes: number of bytes to advance into the cloned array | |
491 | * | |
492 | * This function will copy the array provided in iov to a section of memory | |
493 | * and advance the specified number of bytes into the new array. It returns | |
494 | * the number of segments in the new array. "new" must be at least as big as | |
495 | * the original iov array. | |
496 | */ | |
497 | static unsigned int | |
498 | kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs, | |
499 | size_t bytes) | |
500 | { | |
501 | size_t base = 0; | |
502 | ||
503 | while (bytes || !iov->iov_len) { | |
504 | int copy = min(bytes, iov->iov_len); | |
505 | ||
506 | bytes -= copy; | |
507 | base += copy; | |
508 | if (iov->iov_len == base) { | |
509 | iov++; | |
510 | nr_segs--; | |
511 | base = 0; | |
512 | } | |
513 | } | |
514 | memcpy(new, iov, sizeof(*iov) * nr_segs); | |
515 | new->iov_base += base; | |
516 | new->iov_len -= base; | |
517 | return nr_segs; | |
518 | } | |
519 | ||
1041e3f9 JL |
520 | static struct kvec * |
521 | get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs) | |
e7015fb1 | 522 | { |
1041e3f9 JL |
523 | struct kvec *new_iov; |
524 | ||
525 | if (server->iov && nr_segs <= server->nr_iov) | |
526 | return server->iov; | |
527 | ||
528 | /* not big enough -- allocate a new one and release the old */ | |
529 | new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS); | |
530 | if (new_iov) { | |
531 | kfree(server->iov); | |
532 | server->iov = new_iov; | |
533 | server->nr_iov = nr_segs; | |
534 | } | |
535 | return new_iov; | |
536 | } | |
537 | ||
e28bc5b1 JL |
538 | int |
539 | cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig, | |
540 | unsigned int nr_segs, unsigned int to_read) | |
e7015fb1 | 541 | { |
a52c1eb7 JL |
542 | int length = 0; |
543 | int total_read; | |
42c4dfc2 | 544 | unsigned int segs; |
e831e6cf | 545 | struct msghdr smb_msg; |
42c4dfc2 JL |
546 | struct kvec *iov; |
547 | ||
1041e3f9 | 548 | iov = get_server_iovec(server, nr_segs); |
42c4dfc2 JL |
549 | if (!iov) |
550 | return -ENOMEM; | |
e7015fb1 | 551 | |
e831e6cf JL |
552 | smb_msg.msg_control = NULL; |
553 | smb_msg.msg_controllen = 0; | |
554 | ||
a52c1eb7 | 555 | for (total_read = 0; to_read; total_read += length, to_read -= length) { |
95edcff4 JL |
556 | try_to_freeze(); |
557 | ||
ba749e6d | 558 | if (server_unresponsive(server)) { |
a52c1eb7 | 559 | total_read = -EAGAIN; |
ba749e6d JL |
560 | break; |
561 | } | |
562 | ||
42c4dfc2 JL |
563 | segs = kvec_array_init(iov, iov_orig, nr_segs, total_read); |
564 | ||
565 | length = kernel_recvmsg(server->ssocket, &smb_msg, | |
566 | iov, segs, to_read, 0); | |
e7015fb1 | 567 | |
e7015fb1 | 568 | if (server->tcpStatus == CifsExiting) { |
a52c1eb7 | 569 | total_read = -ESHUTDOWN; |
e7015fb1 PS |
570 | break; |
571 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
572 | cifs_reconnect(server); | |
a52c1eb7 | 573 | total_read = -EAGAIN; |
e7015fb1 PS |
574 | break; |
575 | } else if (length == -ERESTARTSYS || | |
576 | length == -EAGAIN || | |
577 | length == -EINTR) { | |
578 | /* | |
579 | * Minimum sleep to prevent looping, allowing socket | |
580 | * to clear and app threads to set tcpStatus | |
581 | * CifsNeedReconnect if server hung. | |
582 | */ | |
583 | usleep_range(1000, 2000); | |
584 | length = 0; | |
a52c1eb7 | 585 | continue; |
e7015fb1 | 586 | } else if (length <= 0) { |
a52c1eb7 JL |
587 | cFYI(1, "Received no data or error: expecting %d " |
588 | "got %d", to_read, length); | |
e7015fb1 | 589 | cifs_reconnect(server); |
a52c1eb7 | 590 | total_read = -EAGAIN; |
e7015fb1 PS |
591 | break; |
592 | } | |
593 | } | |
a52c1eb7 | 594 | return total_read; |
e7015fb1 | 595 | } |
e7015fb1 | 596 | |
e28bc5b1 JL |
597 | int |
598 | cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, | |
599 | unsigned int to_read) | |
42c4dfc2 JL |
600 | { |
601 | struct kvec iov; | |
602 | ||
603 | iov.iov_base = buf; | |
604 | iov.iov_len = to_read; | |
605 | ||
e28bc5b1 | 606 | return cifs_readv_from_socket(server, &iov, 1, to_read); |
e7015fb1 PS |
607 | } |
608 | ||
98bac62c | 609 | static bool |
fe11e4cc | 610 | is_smb_response(struct TCP_Server_Info *server, unsigned char type) |
98bac62c | 611 | { |
98bac62c PS |
612 | /* |
613 | * The first byte big endian of the length field, | |
614 | * is actually not part of the length but the type | |
615 | * with the most common, zero, as regular data. | |
616 | */ | |
fe11e4cc JL |
617 | switch (type) { |
618 | case RFC1002_SESSION_MESSAGE: | |
619 | /* Regular SMB response */ | |
620 | return true; | |
621 | case RFC1002_SESSION_KEEP_ALIVE: | |
622 | cFYI(1, "RFC 1002 session keep alive"); | |
623 | break; | |
624 | case RFC1002_POSITIVE_SESSION_RESPONSE: | |
625 | cFYI(1, "RFC 1002 positive session response"); | |
626 | break; | |
627 | case RFC1002_NEGATIVE_SESSION_RESPONSE: | |
98bac62c PS |
628 | /* |
629 | * We get this from Windows 98 instead of an error on | |
630 | * SMB negprot response. | |
631 | */ | |
fe11e4cc | 632 | cFYI(1, "RFC 1002 negative session response"); |
98bac62c PS |
633 | /* give server a second to clean up */ |
634 | msleep(1000); | |
635 | /* | |
636 | * Always try 445 first on reconnect since we get NACK | |
637 | * on some if we ever connected to port 139 (the NACK | |
638 | * is since we do not begin with RFC1001 session | |
639 | * initialize frame). | |
640 | */ | |
fe11e4cc | 641 | cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT); |
98bac62c PS |
642 | cifs_reconnect(server); |
643 | wake_up(&server->response_q); | |
fe11e4cc JL |
644 | break; |
645 | default: | |
646 | cERROR(1, "RFC 1002 unknown response type 0x%x", type); | |
98bac62c | 647 | cifs_reconnect(server); |
98bac62c PS |
648 | } |
649 | ||
fe11e4cc | 650 | return false; |
98bac62c PS |
651 | } |
652 | ||
e28bc5b1 JL |
653 | void |
654 | dequeue_mid(struct mid_q_entry *mid, bool malformed) | |
ea1f4502 | 655 | { |
ad69bae1 | 656 | #ifdef CONFIG_CIFS_STATS2 |
ea1f4502 | 657 | mid->when_received = jiffies; |
ad69bae1 | 658 | #endif |
ea1f4502 JL |
659 | spin_lock(&GlobalMid_Lock); |
660 | if (!malformed) | |
7c9421e1 | 661 | mid->mid_state = MID_RESPONSE_RECEIVED; |
ea1f4502 | 662 | else |
7c9421e1 | 663 | mid->mid_state = MID_RESPONSE_MALFORMED; |
ea1f4502 | 664 | list_del_init(&mid->qhead); |
ad69bae1 | 665 | spin_unlock(&GlobalMid_Lock); |
ea1f4502 | 666 | } |
ad69bae1 | 667 | |
c8054ebd JL |
668 | static void |
669 | handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, | |
d4e4854f | 670 | char *buf, int malformed) |
ea1f4502 | 671 | { |
316cf94a PS |
672 | if (server->ops->check_trans2 && |
673 | server->ops->check_trans2(mid, server, buf, malformed)) | |
c8054ebd | 674 | return; |
ea1f4502 | 675 | mid->resp_buf = buf; |
7c9421e1 | 676 | mid->large_buf = server->large_buf; |
2a37ef94 JL |
677 | /* Was previous buf put in mpx struct for multi-rsp? */ |
678 | if (!mid->multiRsp) { | |
679 | /* smb buffer will be freed by user thread */ | |
680 | if (server->large_buf) | |
681 | server->bigbuf = NULL; | |
682 | else | |
683 | server->smallbuf = NULL; | |
684 | } | |
ffc00e27 | 685 | dequeue_mid(mid, malformed); |
ad69bae1 PS |
686 | } |
687 | ||
762dfd10 PS |
688 | static void clean_demultiplex_info(struct TCP_Server_Info *server) |
689 | { | |
690 | int length; | |
691 | ||
692 | /* take it off the list, if it's not already */ | |
693 | spin_lock(&cifs_tcp_ses_lock); | |
694 | list_del_init(&server->tcp_ses_list); | |
695 | spin_unlock(&cifs_tcp_ses_lock); | |
696 | ||
697 | spin_lock(&GlobalMid_Lock); | |
698 | server->tcpStatus = CifsExiting; | |
699 | spin_unlock(&GlobalMid_Lock); | |
700 | wake_up_all(&server->response_q); | |
701 | ||
2d86dbc9 | 702 | /* check if we have blocked requests that need to free */ |
fc40f9cf | 703 | spin_lock(&server->req_lock); |
2d86dbc9 PS |
704 | if (server->credits <= 0) |
705 | server->credits = 1; | |
fc40f9cf | 706 | spin_unlock(&server->req_lock); |
762dfd10 PS |
707 | /* |
708 | * Although there should not be any requests blocked on this queue it | |
709 | * can not hurt to be paranoid and try to wake up requests that may | |
710 | * haven been blocked when more than 50 at time were on the wire to the | |
711 | * same server - they now will see the session is in exit state and get | |
712 | * out of SendReceive. | |
713 | */ | |
714 | wake_up_all(&server->request_q); | |
715 | /* give those requests time to exit */ | |
716 | msleep(125); | |
717 | ||
718 | if (server->ssocket) { | |
719 | sock_release(server->ssocket); | |
720 | server->ssocket = NULL; | |
721 | } | |
722 | ||
723 | if (!list_empty(&server->pending_mid_q)) { | |
724 | struct list_head dispose_list; | |
725 | struct mid_q_entry *mid_entry; | |
726 | struct list_head *tmp, *tmp2; | |
727 | ||
728 | INIT_LIST_HEAD(&dispose_list); | |
729 | spin_lock(&GlobalMid_Lock); | |
730 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { | |
731 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 PS |
732 | cFYI(1, "Clearing mid 0x%llx", mid_entry->mid); |
733 | mid_entry->mid_state = MID_SHUTDOWN; | |
762dfd10 PS |
734 | list_move(&mid_entry->qhead, &dispose_list); |
735 | } | |
736 | spin_unlock(&GlobalMid_Lock); | |
737 | ||
738 | /* now walk dispose list and issue callbacks */ | |
739 | list_for_each_safe(tmp, tmp2, &dispose_list) { | |
740 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 | 741 | cFYI(1, "Callback mid 0x%llx", mid_entry->mid); |
762dfd10 PS |
742 | list_del_init(&mid_entry->qhead); |
743 | mid_entry->callback(mid_entry); | |
744 | } | |
745 | /* 1/8th of sec is more than enough time for them to exit */ | |
746 | msleep(125); | |
747 | } | |
748 | ||
749 | if (!list_empty(&server->pending_mid_q)) { | |
750 | /* | |
751 | * mpx threads have not exited yet give them at least the smb | |
752 | * send timeout time for long ops. | |
753 | * | |
754 | * Due to delays on oplock break requests, we need to wait at | |
755 | * least 45 seconds before giving up on a request getting a | |
756 | * response and going ahead and killing cifsd. | |
757 | */ | |
758 | cFYI(1, "Wait for exit from demultiplex thread"); | |
759 | msleep(46000); | |
760 | /* | |
761 | * If threads still have not exited they are probably never | |
762 | * coming home not much else we can do but free the memory. | |
763 | */ | |
764 | } | |
765 | ||
766 | kfree(server->hostname); | |
1041e3f9 | 767 | kfree(server->iov); |
762dfd10 PS |
768 | kfree(server); |
769 | ||
770 | length = atomic_dec_return(&tcpSesAllocCount); | |
771 | if (length > 0) | |
772 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, | |
773 | GFP_KERNEL); | |
774 | } | |
775 | ||
e9097ab4 JL |
776 | static int |
777 | standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
778 | { | |
779 | int length; | |
780 | char *buf = server->smallbuf; | |
d4e4854f | 781 | unsigned int pdu_length = get_rfc1002_length(buf); |
e9097ab4 JL |
782 | |
783 | /* make sure this will fit in a large buffer */ | |
1887f601 | 784 | if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) { |
e9097ab4 JL |
785 | cERROR(1, "SMB response too long (%u bytes)", |
786 | pdu_length); | |
787 | cifs_reconnect(server); | |
788 | wake_up(&server->response_q); | |
789 | return -EAGAIN; | |
790 | } | |
791 | ||
792 | /* switch to large buffer if too big for a small one */ | |
793 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { | |
794 | server->large_buf = true; | |
d4e4854f | 795 | memcpy(server->bigbuf, buf, server->total_read); |
e9097ab4 | 796 | buf = server->bigbuf; |
e9097ab4 JL |
797 | } |
798 | ||
799 | /* now read the rest */ | |
1887f601 PS |
800 | length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, |
801 | pdu_length - HEADER_SIZE(server) + 1 + 4); | |
e9097ab4 JL |
802 | if (length < 0) |
803 | return length; | |
804 | server->total_read += length; | |
805 | ||
d4e4854f | 806 | dump_smb(buf, server->total_read); |
e9097ab4 JL |
807 | |
808 | /* | |
809 | * We know that we received enough to get to the MID as we | |
810 | * checked the pdu_length earlier. Now check to see | |
811 | * if the rest of the header is OK. We borrow the length | |
812 | * var for the rest of the loop to avoid a new stack var. | |
813 | * | |
814 | * 48 bytes is enough to display the header and a little bit | |
815 | * into the payload for debugging purposes. | |
816 | */ | |
8aa26f3e | 817 | length = server->ops->check_message(buf, server->total_read); |
e9097ab4 JL |
818 | if (length != 0) |
819 | cifs_dump_mem("Bad SMB: ", buf, | |
820 | min_t(unsigned int, server->total_read, 48)); | |
821 | ||
2e44b288 PS |
822 | if (server->ops->is_status_pending && |
823 | server->ops->is_status_pending(buf, server, length)) | |
824 | return -1; | |
825 | ||
ff4fa4a2 JL |
826 | if (!mid) |
827 | return length; | |
e9097ab4 | 828 | |
d4e4854f | 829 | handle_mid(mid, server, buf, length); |
ff4fa4a2 | 830 | return 0; |
e9097ab4 JL |
831 | } |
832 | ||
1da177e4 | 833 | static int |
7c97c200 | 834 | cifs_demultiplex_thread(void *p) |
1da177e4 LT |
835 | { |
836 | int length; | |
7c97c200 | 837 | struct TCP_Server_Info *server = p; |
2a37ef94 JL |
838 | unsigned int pdu_length; |
839 | char *buf = NULL; | |
1da177e4 LT |
840 | struct task_struct *task_to_wake = NULL; |
841 | struct mid_q_entry *mid_entry; | |
1da177e4 | 842 | |
1da177e4 | 843 | current->flags |= PF_MEMALLOC; |
b6b38f70 | 844 | cFYI(1, "Demultiplex PID: %d", task_pid_nr(current)); |
93d0ec85 JL |
845 | |
846 | length = atomic_inc_return(&tcpSesAllocCount); | |
847 | if (length > 1) | |
26f57364 SF |
848 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, |
849 | GFP_KERNEL); | |
1da177e4 | 850 | |
83144186 | 851 | set_freezable(); |
469ee614 | 852 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
853 | if (try_to_freeze()) |
854 | continue; | |
b8643e1b | 855 | |
2a37ef94 | 856 | if (!allocate_buffers(server)) |
3d9c2472 | 857 | continue; |
b8643e1b | 858 | |
2a37ef94 | 859 | server->large_buf = false; |
2a37ef94 | 860 | buf = server->smallbuf; |
f01d5e14 | 861 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 862 | |
e28bc5b1 | 863 | length = cifs_read_from_socket(server, buf, pdu_length); |
a52c1eb7 | 864 | if (length < 0) |
1da177e4 | 865 | continue; |
2a37ef94 | 866 | server->total_read = length; |
1da177e4 | 867 | |
98bac62c PS |
868 | /* |
869 | * The right amount was read from socket - 4 bytes, | |
870 | * so we can now interpret the length field. | |
871 | */ | |
d4e4854f | 872 | pdu_length = get_rfc1002_length(buf); |
70ca734a | 873 | |
fe11e4cc JL |
874 | cFYI(1, "RFC1002 header 0x%x", pdu_length); |
875 | if (!is_smb_response(server, buf[0])) | |
fb8c4b14 | 876 | continue; |
e4eb295d | 877 | |
89482a56 | 878 | /* make sure we have enough to get to the MID */ |
1887f601 | 879 | if (pdu_length < HEADER_SIZE(server) - 1 - 4) { |
89482a56 JL |
880 | cERROR(1, "SMB response too short (%u bytes)", |
881 | pdu_length); | |
882 | cifs_reconnect(server); | |
883 | wake_up(&server->response_q); | |
884 | continue; | |
e4eb295d | 885 | } |
e7015fb1 | 886 | |
89482a56 | 887 | /* read down to the MID */ |
e28bc5b1 | 888 | length = cifs_read_from_socket(server, buf + 4, |
1887f601 | 889 | HEADER_SIZE(server) - 1 - 4); |
89482a56 | 890 | if (length < 0) |
e4eb295d | 891 | continue; |
2a37ef94 | 892 | server->total_read += length; |
1da177e4 | 893 | |
8aa26f3e | 894 | mid_entry = server->ops->find_mid(server, buf); |
50c2f753 | 895 | |
44d22d84 JL |
896 | if (!mid_entry || !mid_entry->receive) |
897 | length = standard_receive3(server, mid_entry); | |
898 | else | |
899 | length = mid_entry->receive(server, mid_entry); | |
71823baf | 900 | |
e9097ab4 | 901 | if (length < 0) |
fe11e4cc | 902 | continue; |
1da177e4 | 903 | |
d4e4854f | 904 | if (server->large_buf) |
2a37ef94 | 905 | buf = server->bigbuf; |
fda35943 | 906 | |
fda35943 | 907 | server->lstrp = jiffies; |
2b84a36c | 908 | if (mid_entry != NULL) { |
2a37ef94 JL |
909 | if (!mid_entry->multiRsp || mid_entry->multiEnd) |
910 | mid_entry->callback(mid_entry); | |
7f0adb53 PS |
911 | } else if (!server->ops->is_oplock_break || |
912 | !server->ops->is_oplock_break(buf, server)) { | |
b6b38f70 | 913 | cERROR(1, "No task to wake, unknown frame received! " |
8097531a | 914 | "NumMids %d", atomic_read(&midCount)); |
1887f601 PS |
915 | cifs_dump_mem("Received Data is: ", buf, |
916 | HEADER_SIZE(server)); | |
3979877e | 917 | #ifdef CONFIG_CIFS_DEBUG2 |
7f0adb53 PS |
918 | if (server->ops->dump_detail) |
919 | server->ops->dump_detail(buf); | |
3979877e SF |
920 | cifs_dump_mids(server); |
921 | #endif /* CIFS_DEBUG2 */ | |
50c2f753 | 922 | |
e4eb295d SF |
923 | } |
924 | } /* end while !EXITING */ | |
925 | ||
fd62cb7e | 926 | /* buffer usually freed in free_mid - need to free it here on exit */ |
2a37ef94 JL |
927 | cifs_buf_release(server->bigbuf); |
928 | if (server->smallbuf) /* no sense logging a debug message if NULL */ | |
929 | cifs_small_buf_release(server->smallbuf); | |
1da177e4 | 930 | |
b1c8d2b4 | 931 | task_to_wake = xchg(&server->tsk, NULL); |
762dfd10 | 932 | clean_demultiplex_info(server); |
50c2f753 | 933 | |
b1c8d2b4 JL |
934 | /* if server->tsk was NULL then wait for a signal before exiting */ |
935 | if (!task_to_wake) { | |
936 | set_current_state(TASK_INTERRUPTIBLE); | |
937 | while (!signal_pending(current)) { | |
938 | schedule(); | |
939 | set_current_state(TASK_INTERRUPTIBLE); | |
940 | } | |
941 | set_current_state(TASK_RUNNING); | |
942 | } | |
943 | ||
0468a2cf | 944 | module_put_and_exit(0); |
1da177e4 LT |
945 | } |
946 | ||
c359cf3c JL |
947 | /* extract the host portion of the UNC string */ |
948 | static char * | |
949 | extract_hostname(const char *unc) | |
950 | { | |
951 | const char *src; | |
952 | char *dst, *delim; | |
953 | unsigned int len; | |
954 | ||
955 | /* skip double chars at beginning of string */ | |
956 | /* BB: check validity of these bytes? */ | |
957 | src = unc + 2; | |
958 | ||
959 | /* delimiter between hostname and sharename is always '\\' now */ | |
960 | delim = strchr(src, '\\'); | |
961 | if (!delim) | |
962 | return ERR_PTR(-EINVAL); | |
963 | ||
964 | len = delim - src; | |
965 | dst = kmalloc((len + 1), GFP_KERNEL); | |
966 | if (dst == NULL) | |
967 | return ERR_PTR(-ENOMEM); | |
968 | ||
969 | memcpy(dst, src, len); | |
970 | dst[len] = '\0'; | |
971 | ||
972 | return dst; | |
973 | } | |
974 | ||
8830d7e0 SP |
975 | static int get_option_ul(substring_t args[], unsigned long *option) |
976 | { | |
977 | int rc; | |
978 | char *string; | |
979 | ||
980 | string = match_strdup(args); | |
981 | if (string == NULL) | |
982 | return -ENOMEM; | |
bfa890a3 | 983 | rc = kstrtoul(string, 0, option); |
8830d7e0 SP |
984 | kfree(string); |
985 | ||
986 | return rc; | |
987 | } | |
988 | ||
989 | ||
990 | static int cifs_parse_security_flavors(char *value, | |
991 | struct smb_vol *vol) | |
992 | { | |
993 | ||
994 | substring_t args[MAX_OPT_ARGS]; | |
995 | ||
996 | switch (match_token(value, cifs_secflavor_tokens, args)) { | |
997 | case Opt_sec_krb5: | |
998 | vol->secFlg |= CIFSSEC_MAY_KRB5; | |
999 | break; | |
1000 | case Opt_sec_krb5i: | |
1001 | vol->secFlg |= CIFSSEC_MAY_KRB5 | CIFSSEC_MUST_SIGN; | |
1002 | break; | |
1003 | case Opt_sec_krb5p: | |
1004 | /* vol->secFlg |= CIFSSEC_MUST_SEAL | CIFSSEC_MAY_KRB5; */ | |
1005 | cERROR(1, "Krb5 cifs privacy not supported"); | |
1006 | break; | |
1007 | case Opt_sec_ntlmssp: | |
1008 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP; | |
1009 | break; | |
1010 | case Opt_sec_ntlmsspi: | |
1011 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP | CIFSSEC_MUST_SIGN; | |
1012 | break; | |
1013 | case Opt_ntlm: | |
1014 | /* ntlm is default so can be turned off too */ | |
1015 | vol->secFlg |= CIFSSEC_MAY_NTLM; | |
1016 | break; | |
1017 | case Opt_sec_ntlmi: | |
1018 | vol->secFlg |= CIFSSEC_MAY_NTLM | CIFSSEC_MUST_SIGN; | |
1019 | break; | |
7659624f | 1020 | case Opt_sec_ntlmv2: |
8830d7e0 SP |
1021 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
1022 | break; | |
1023 | case Opt_sec_ntlmv2i: | |
1024 | vol->secFlg |= CIFSSEC_MAY_NTLMV2 | CIFSSEC_MUST_SIGN; | |
1025 | break; | |
1026 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
1027 | case Opt_sec_lanman: | |
1028 | vol->secFlg |= CIFSSEC_MAY_LANMAN; | |
1029 | break; | |
1030 | #endif | |
1031 | case Opt_sec_none: | |
1032 | vol->nullauth = 1; | |
1033 | break; | |
1034 | default: | |
1035 | cERROR(1, "bad security option: %s", value); | |
1036 | return 1; | |
1037 | } | |
1038 | ||
1039 | return 0; | |
1040 | } | |
1041 | ||
15b6a473 JL |
1042 | static int |
1043 | cifs_parse_cache_flavor(char *value, struct smb_vol *vol) | |
1044 | { | |
1045 | substring_t args[MAX_OPT_ARGS]; | |
1046 | ||
1047 | switch (match_token(value, cifs_cacheflavor_tokens, args)) { | |
1048 | case Opt_cache_loose: | |
1049 | vol->direct_io = false; | |
1050 | vol->strict_io = false; | |
1051 | break; | |
1052 | case Opt_cache_strict: | |
1053 | vol->direct_io = false; | |
1054 | vol->strict_io = true; | |
1055 | break; | |
1056 | case Opt_cache_none: | |
1057 | vol->direct_io = true; | |
1058 | vol->strict_io = false; | |
1059 | break; | |
1060 | default: | |
1061 | cERROR(1, "bad cache= option: %s", value); | |
1062 | return 1; | |
1063 | } | |
1064 | return 0; | |
1065 | } | |
1066 | ||
23db65f5 JL |
1067 | static int |
1068 | cifs_parse_smb_version(char *value, struct smb_vol *vol) | |
1069 | { | |
1070 | substring_t args[MAX_OPT_ARGS]; | |
1071 | ||
1072 | switch (match_token(value, cifs_smb_version_tokens, args)) { | |
1073 | case Smb_1: | |
1074 | vol->ops = &smb1_operations; | |
1075 | vol->vals = &smb1_values; | |
1076 | break; | |
1080ef75 SF |
1077 | #ifdef CONFIG_CIFS_SMB2 |
1078 | case Smb_21: | |
1079 | vol->ops = &smb21_operations; | |
1080 | vol->vals = &smb21_values; | |
1081 | break; | |
1082 | #endif | |
23db65f5 JL |
1083 | default: |
1084 | cERROR(1, "Unknown vers= option specified: %s", value); | |
1085 | return 1; | |
1086 | } | |
1087 | return 0; | |
1088 | } | |
1089 | ||
1da177e4 | 1090 | static int |
b946845a | 1091 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
50c2f753 | 1092 | struct smb_vol *vol) |
1da177e4 | 1093 | { |
8830d7e0 | 1094 | char *data, *end; |
957df453 | 1095 | char *mountdata_copy = NULL, *options; |
1da177e4 LT |
1096 | unsigned int temp_len, i, j; |
1097 | char separator[2]; | |
9b9d6b24 JL |
1098 | short int override_uid = -1; |
1099 | short int override_gid = -1; | |
1100 | bool uid_specified = false; | |
1101 | bool gid_specified = false; | |
d8162558 JL |
1102 | bool sloppy = false; |
1103 | char *invalid = NULL; | |
88463999 | 1104 | char *nodename = utsname()->nodename; |
8830d7e0 SP |
1105 | char *string = NULL; |
1106 | char *tmp_end, *value; | |
1107 | char delim; | |
296838b1 JL |
1108 | bool cache_specified = false; |
1109 | static bool cache_warned = false; | |
1da177e4 LT |
1110 | |
1111 | separator[0] = ','; | |
50c2f753 | 1112 | separator[1] = 0; |
8830d7e0 | 1113 | delim = separator[0]; |
1da177e4 | 1114 | |
88463999 JL |
1115 | /* |
1116 | * does not have to be perfect mapping since field is | |
1117 | * informational, only used for servers that do not support | |
1118 | * port 445 and it can be overridden at mount time | |
1119 | */ | |
1397f2ee JL |
1120 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
1121 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
1122 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
1123 | ||
1397f2ee | 1124 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
1125 | /* null target name indicates to use *SMBSERVR default called name |
1126 | if we end up sending RFC1001 session initialize */ | |
1127 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
1128 | vol->cred_uid = current_uid(); |
1129 | vol->linux_uid = current_uid(); | |
a001e5b5 | 1130 | vol->linux_gid = current_gid(); |
f55ed1a8 JL |
1131 | |
1132 | /* default to only allowing write access to owner of the mount */ | |
1133 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
1134 | |
1135 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
1136 | /* default is always to request posix paths. */ |
1137 | vol->posix_paths = 1; | |
a0c9217f JL |
1138 | /* default to using server inode numbers where available */ |
1139 | vol->server_ino = 1; | |
ac67055e | 1140 | |
6d20e840 SJ |
1141 | vol->actimeo = CIFS_DEF_ACTIMEO; |
1142 | ||
23db65f5 JL |
1143 | /* FIXME: add autonegotiation -- for now, SMB1 is default */ |
1144 | vol->ops = &smb1_operations; | |
1145 | vol->vals = &smb1_values; | |
1146 | ||
b946845a SF |
1147 | if (!mountdata) |
1148 | goto cifs_parse_mount_err; | |
1149 | ||
1150 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); | |
1151 | if (!mountdata_copy) | |
1152 | goto cifs_parse_mount_err; | |
1da177e4 | 1153 | |
b946845a | 1154 | options = mountdata_copy; |
4906e50b | 1155 | end = options + strlen(options); |
8830d7e0 | 1156 | |
50c2f753 | 1157 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 1158 | if (options[4] != 0) { |
1da177e4 LT |
1159 | separator[0] = options[4]; |
1160 | options += 5; | |
1161 | } else { | |
b6b38f70 | 1162 | cFYI(1, "Null separator not allowed"); |
1da177e4 LT |
1163 | } |
1164 | } | |
3d3ea8e6 SP |
1165 | vol->backupuid_specified = false; /* no backup intent for a user */ |
1166 | vol->backupgid_specified = false; /* no backup intent for a group */ | |
50c2f753 | 1167 | |
1da177e4 | 1168 | while ((data = strsep(&options, separator)) != NULL) { |
8830d7e0 SP |
1169 | substring_t args[MAX_OPT_ARGS]; |
1170 | unsigned long option; | |
1171 | int token; | |
1172 | ||
1da177e4 LT |
1173 | if (!*data) |
1174 | continue; | |
1da177e4 | 1175 | |
8830d7e0 SP |
1176 | token = match_token(data, cifs_mount_option_tokens, args); |
1177 | ||
1178 | switch (token) { | |
1179 | ||
1180 | /* Ingnore the following */ | |
1181 | case Opt_ignore: | |
1182 | break; | |
1183 | ||
1184 | /* Boolean values */ | |
1185 | case Opt_user_xattr: | |
1da177e4 | 1186 | vol->no_xattr = 0; |
8830d7e0 SP |
1187 | break; |
1188 | case Opt_nouser_xattr: | |
1da177e4 | 1189 | vol->no_xattr = 1; |
8830d7e0 SP |
1190 | break; |
1191 | case Opt_forceuid: | |
9b9d6b24 | 1192 | override_uid = 1; |
8830d7e0 SP |
1193 | break; |
1194 | case Opt_noforceuid: | |
9b9d6b24 | 1195 | override_uid = 0; |
8830d7e0 SP |
1196 | break; |
1197 | case Opt_noblocksend: | |
edf1ae40 | 1198 | vol->noblocksnd = 1; |
8830d7e0 SP |
1199 | break; |
1200 | case Opt_noautotune: | |
edf1ae40 | 1201 | vol->noautotune = 1; |
8830d7e0 SP |
1202 | break; |
1203 | case Opt_hard: | |
1da177e4 | 1204 | vol->retry = 1; |
8830d7e0 SP |
1205 | break; |
1206 | case Opt_soft: | |
1da177e4 | 1207 | vol->retry = 0; |
8830d7e0 SP |
1208 | break; |
1209 | case Opt_perm: | |
1da177e4 | 1210 | vol->noperm = 0; |
8830d7e0 SP |
1211 | break; |
1212 | case Opt_noperm: | |
1da177e4 | 1213 | vol->noperm = 1; |
8830d7e0 SP |
1214 | break; |
1215 | case Opt_mapchars: | |
6a0b4824 | 1216 | vol->remap = 1; |
8830d7e0 SP |
1217 | break; |
1218 | case Opt_nomapchars: | |
6a0b4824 | 1219 | vol->remap = 0; |
8830d7e0 SP |
1220 | break; |
1221 | case Opt_sfu: | |
50c2f753 | 1222 | vol->sfu_emul = 1; |
8830d7e0 SP |
1223 | break; |
1224 | case Opt_nosfu: | |
50c2f753 | 1225 | vol->sfu_emul = 0; |
8830d7e0 SP |
1226 | break; |
1227 | case Opt_nodfs: | |
2c1b8615 | 1228 | vol->nodfs = 1; |
8830d7e0 SP |
1229 | break; |
1230 | case Opt_posixpaths: | |
ac67055e | 1231 | vol->posix_paths = 1; |
8830d7e0 SP |
1232 | break; |
1233 | case Opt_noposixpaths: | |
ac67055e | 1234 | vol->posix_paths = 0; |
8830d7e0 SP |
1235 | break; |
1236 | case Opt_nounix: | |
c18c842b | 1237 | vol->no_linux_ext = 1; |
8830d7e0 SP |
1238 | break; |
1239 | case Opt_nocase: | |
50c2f753 | 1240 | vol->nocase = 1; |
8830d7e0 SP |
1241 | break; |
1242 | case Opt_brl: | |
c46fa8ac | 1243 | vol->nobrl = 0; |
8830d7e0 SP |
1244 | break; |
1245 | case Opt_nobrl: | |
c46fa8ac | 1246 | vol->nobrl = 1; |
5cfdddcf PS |
1247 | /* |
1248 | * turn off mandatory locking in mode | |
8830d7e0 | 1249 | * if remote locking is turned off since the |
5cfdddcf PS |
1250 | * local vfs will do advisory |
1251 | */ | |
50c2f753 SF |
1252 | if (vol->file_mode == |
1253 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1254 | vol->file_mode = S_IALLUGO; |
8830d7e0 SP |
1255 | break; |
1256 | case Opt_forcemandatorylock: | |
13a6e42a | 1257 | vol->mand_lock = 1; |
8830d7e0 SP |
1258 | break; |
1259 | case Opt_setuids: | |
1da177e4 | 1260 | vol->setuids = 1; |
8830d7e0 SP |
1261 | break; |
1262 | case Opt_nosetuids: | |
1da177e4 | 1263 | vol->setuids = 0; |
8830d7e0 SP |
1264 | break; |
1265 | case Opt_dynperm: | |
d0a9c078 | 1266 | vol->dynperm = true; |
8830d7e0 SP |
1267 | break; |
1268 | case Opt_nodynperm: | |
d0a9c078 | 1269 | vol->dynperm = false; |
8830d7e0 SP |
1270 | break; |
1271 | case Opt_nohard: | |
1da177e4 | 1272 | vol->retry = 0; |
8830d7e0 SP |
1273 | break; |
1274 | case Opt_nosoft: | |
1da177e4 | 1275 | vol->retry = 1; |
8830d7e0 SP |
1276 | break; |
1277 | case Opt_nointr: | |
1da177e4 | 1278 | vol->intr = 0; |
8830d7e0 SP |
1279 | break; |
1280 | case Opt_intr: | |
1da177e4 | 1281 | vol->intr = 1; |
8830d7e0 SP |
1282 | break; |
1283 | case Opt_nostrictsync: | |
be652445 | 1284 | vol->nostrictsync = 1; |
8830d7e0 SP |
1285 | break; |
1286 | case Opt_strictsync: | |
be652445 | 1287 | vol->nostrictsync = 0; |
8830d7e0 SP |
1288 | break; |
1289 | case Opt_serverino: | |
1da177e4 | 1290 | vol->server_ino = 1; |
8830d7e0 SP |
1291 | break; |
1292 | case Opt_noserverino: | |
1da177e4 | 1293 | vol->server_ino = 0; |
8830d7e0 SP |
1294 | break; |
1295 | case Opt_rwpidforward: | |
d4ffff1f | 1296 | vol->rwpidforward = 1; |
8830d7e0 SP |
1297 | break; |
1298 | case Opt_cifsacl: | |
0a4b92c0 | 1299 | vol->cifs_acl = 1; |
8830d7e0 SP |
1300 | break; |
1301 | case Opt_nocifsacl: | |
0a4b92c0 | 1302 | vol->cifs_acl = 0; |
8830d7e0 SP |
1303 | break; |
1304 | case Opt_acl: | |
1da177e4 | 1305 | vol->no_psx_acl = 0; |
8830d7e0 SP |
1306 | break; |
1307 | case Opt_noacl: | |
1da177e4 | 1308 | vol->no_psx_acl = 1; |
8830d7e0 SP |
1309 | break; |
1310 | case Opt_locallease: | |
84210e91 | 1311 | vol->local_lease = 1; |
8830d7e0 SP |
1312 | break; |
1313 | case Opt_sign: | |
750d1151 | 1314 | vol->secFlg |= CIFSSEC_MUST_SIGN; |
8830d7e0 SP |
1315 | break; |
1316 | case Opt_seal: | |
95b1cb90 | 1317 | /* we do not do the following in secFlags because seal |
8830d7e0 SP |
1318 | * is a per tree connection (mount) not a per socket |
1319 | * or per-smb connection option in the protocol | |
1320 | * vol->secFlg |= CIFSSEC_MUST_SEAL; | |
1321 | */ | |
95b1cb90 | 1322 | vol->seal = 1; |
8830d7e0 SP |
1323 | break; |
1324 | case Opt_direct: | |
296838b1 | 1325 | cache_specified = true; |
15b6a473 JL |
1326 | vol->direct_io = true; |
1327 | vol->strict_io = false; | |
09983b2f JL |
1328 | cERROR(1, "The \"directio\" option will be removed in " |
1329 | "3.7. Please switch to the \"cache=none\" " | |
1330 | "option."); | |
8830d7e0 SP |
1331 | break; |
1332 | case Opt_strictcache: | |
296838b1 | 1333 | cache_specified = true; |
15b6a473 JL |
1334 | vol->direct_io = false; |
1335 | vol->strict_io = true; | |
09983b2f JL |
1336 | cERROR(1, "The \"strictcache\" option will be removed " |
1337 | "in 3.7. Please switch to the \"cache=strict\" " | |
1338 | "option."); | |
8830d7e0 SP |
1339 | break; |
1340 | case Opt_noac: | |
50c2f753 SF |
1341 | printk(KERN_WARNING "CIFS: Mount option noac not " |
1342 | "supported. Instead set " | |
1343 | "/proc/fs/cifs/LookupCacheEnabled to 0\n"); | |
8830d7e0 SP |
1344 | break; |
1345 | case Opt_fsc: | |
607a569d | 1346 | #ifndef CONFIG_CIFS_FSCACHE |
83fb086e | 1347 | cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE " |
607a569d | 1348 | "kernel config option set"); |
b946845a | 1349 | goto cifs_parse_mount_err; |
607a569d | 1350 | #endif |
fa1df75d | 1351 | vol->fsc = true; |
8830d7e0 SP |
1352 | break; |
1353 | case Opt_mfsymlinks: | |
736a3320 | 1354 | vol->mfsymlinks = true; |
8830d7e0 SP |
1355 | break; |
1356 | case Opt_multiuser: | |
0eb8a132 | 1357 | vol->multiuser = true; |
8830d7e0 | 1358 | break; |
d8162558 JL |
1359 | case Opt_sloppy: |
1360 | sloppy = true; | |
1361 | break; | |
8830d7e0 SP |
1362 | |
1363 | /* Numeric Values */ | |
1364 | case Opt_backupuid: | |
1365 | if (get_option_ul(args, &option)) { | |
3d3ea8e6 SP |
1366 | cERROR(1, "%s: Invalid backupuid value", |
1367 | __func__); | |
1368 | goto cifs_parse_mount_err; | |
1369 | } | |
8830d7e0 | 1370 | vol->backupuid = option; |
3d3ea8e6 | 1371 | vol->backupuid_specified = true; |
8830d7e0 SP |
1372 | break; |
1373 | case Opt_backupgid: | |
1374 | if (get_option_ul(args, &option)) { | |
3d3ea8e6 SP |
1375 | cERROR(1, "%s: Invalid backupgid value", |
1376 | __func__); | |
1377 | goto cifs_parse_mount_err; | |
1378 | } | |
8830d7e0 | 1379 | vol->backupgid = option; |
3d3ea8e6 | 1380 | vol->backupgid_specified = true; |
8830d7e0 SP |
1381 | break; |
1382 | case Opt_uid: | |
1383 | if (get_option_ul(args, &option)) { | |
1384 | cERROR(1, "%s: Invalid uid value", | |
1385 | __func__); | |
1386 | goto cifs_parse_mount_err; | |
1387 | } | |
1388 | vol->linux_uid = option; | |
1389 | uid_specified = true; | |
1390 | break; | |
1391 | case Opt_cruid: | |
1392 | if (get_option_ul(args, &option)) { | |
1393 | cERROR(1, "%s: Invalid cruid value", | |
1394 | __func__); | |
1395 | goto cifs_parse_mount_err; | |
1396 | } | |
1397 | vol->cred_uid = option; | |
1398 | break; | |
1399 | case Opt_gid: | |
1400 | if (get_option_ul(args, &option)) { | |
1401 | cERROR(1, "%s: Invalid gid value", | |
1402 | __func__); | |
1403 | goto cifs_parse_mount_err; | |
1404 | } | |
1405 | vol->linux_gid = option; | |
1406 | gid_specified = true; | |
1407 | break; | |
1408 | case Opt_file_mode: | |
1409 | if (get_option_ul(args, &option)) { | |
1410 | cERROR(1, "%s: Invalid file_mode value", | |
1411 | __func__); | |
1412 | goto cifs_parse_mount_err; | |
1413 | } | |
1414 | vol->file_mode = option; | |
1415 | break; | |
1416 | case Opt_dirmode: | |
1417 | if (get_option_ul(args, &option)) { | |
1418 | cERROR(1, "%s: Invalid dir_mode value", | |
1419 | __func__); | |
1420 | goto cifs_parse_mount_err; | |
1421 | } | |
1422 | vol->dir_mode = option; | |
1423 | break; | |
1424 | case Opt_port: | |
1425 | if (get_option_ul(args, &option)) { | |
1426 | cERROR(1, "%s: Invalid port value", | |
1427 | __func__); | |
1428 | goto cifs_parse_mount_err; | |
1429 | } | |
1430 | vol->port = option; | |
1431 | break; | |
1432 | case Opt_rsize: | |
1433 | if (get_option_ul(args, &option)) { | |
1434 | cERROR(1, "%s: Invalid rsize value", | |
1435 | __func__); | |
b946845a | 1436 | goto cifs_parse_mount_err; |
8830d7e0 SP |
1437 | } |
1438 | vol->rsize = option; | |
1439 | break; | |
1440 | case Opt_wsize: | |
1441 | if (get_option_ul(args, &option)) { | |
1442 | cERROR(1, "%s: Invalid wsize value", | |
1443 | __func__); | |
1444 | goto cifs_parse_mount_err; | |
1445 | } | |
1446 | vol->wsize = option; | |
1447 | break; | |
1448 | case Opt_actimeo: | |
1449 | if (get_option_ul(args, &option)) { | |
1450 | cERROR(1, "%s: Invalid actimeo value", | |
1451 | __func__); | |
1452 | goto cifs_parse_mount_err; | |
1453 | } | |
1454 | vol->actimeo = HZ * option; | |
1455 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
1456 | cERROR(1, "CIFS: attribute cache" | |
1457 | "timeout too large"); | |
1458 | goto cifs_parse_mount_err; | |
1459 | } | |
1460 | break; | |
1461 | ||
1462 | /* String Arguments */ | |
1463 | ||
4fe9e963 SP |
1464 | case Opt_blank_user: |
1465 | /* null user, ie. anonymous authentication */ | |
1466 | vol->nullauth = 1; | |
1467 | vol->username = NULL; | |
1468 | break; | |
8830d7e0 SP |
1469 | case Opt_user: |
1470 | string = match_strdup(args); | |
1471 | if (string == NULL) | |
1472 | goto out_nomem; | |
1473 | ||
4fe9e963 | 1474 | if (strnlen(string, MAX_USERNAME_SIZE) > |
8830d7e0 SP |
1475 | MAX_USERNAME_SIZE) { |
1476 | printk(KERN_WARNING "CIFS: username too long\n"); | |
1477 | goto cifs_parse_mount_err; | |
1478 | } | |
1479 | vol->username = kstrdup(string, GFP_KERNEL); | |
1480 | if (!vol->username) { | |
1481 | printk(KERN_WARNING "CIFS: no memory " | |
1482 | "for username\n"); | |
1483 | goto cifs_parse_mount_err; | |
1484 | } | |
1485 | break; | |
1486 | case Opt_blank_pass: | |
1487 | vol->password = NULL; | |
1488 | break; | |
1489 | case Opt_pass: | |
1490 | /* passwords have to be handled differently | |
1491 | * to allow the character used for deliminator | |
1492 | * to be passed within them | |
1493 | */ | |
1494 | ||
1495 | /* Obtain the value string */ | |
1496 | value = strchr(data, '='); | |
10238074 | 1497 | value++; |
8830d7e0 SP |
1498 | |
1499 | /* Set tmp_end to end of the string */ | |
1500 | tmp_end = (char *) value + strlen(value); | |
1501 | ||
1502 | /* Check if following character is the deliminator | |
1503 | * If yes, we have encountered a double deliminator | |
1504 | * reset the NULL character to the deliminator | |
1505 | */ | |
e73f843a | 1506 | if (tmp_end < end && tmp_end[1] == delim) { |
8830d7e0 SP |
1507 | tmp_end[0] = delim; |
1508 | ||
e73f843a SJ |
1509 | /* Keep iterating until we get to a single |
1510 | * deliminator OR the end | |
1511 | */ | |
1512 | while ((tmp_end = strchr(tmp_end, delim)) | |
1513 | != NULL && (tmp_end[1] == delim)) { | |
1514 | tmp_end = (char *) &tmp_end[2]; | |
1515 | } | |
1516 | ||
1517 | /* Reset var options to point to next element */ | |
1518 | if (tmp_end) { | |
1519 | tmp_end[0] = '\0'; | |
1520 | options = (char *) &tmp_end[1]; | |
1521 | } else | |
1522 | /* Reached the end of the mount option | |
1523 | * string */ | |
1524 | options = end; | |
8830d7e0 SP |
1525 | } |
1526 | ||
8830d7e0 SP |
1527 | /* Now build new password string */ |
1528 | temp_len = strlen(value); | |
1529 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); | |
1530 | if (vol->password == NULL) { | |
1531 | printk(KERN_WARNING "CIFS: no memory " | |
1532 | "for password\n"); | |
1533 | goto cifs_parse_mount_err; | |
1534 | } | |
1535 | ||
1536 | for (i = 0, j = 0; i < temp_len; i++, j++) { | |
1537 | vol->password[j] = value[i]; | |
1538 | if ((value[i] == delim) && | |
1539 | value[i+1] == delim) | |
1540 | /* skip the second deliminator */ | |
1541 | i++; | |
1542 | } | |
1543 | vol->password[j] = '\0'; | |
1544 | break; | |
4fe9e963 SP |
1545 | case Opt_blank_ip: |
1546 | vol->UNCip = NULL; | |
1547 | break; | |
8830d7e0 SP |
1548 | case Opt_ip: |
1549 | string = match_strdup(args); | |
1550 | if (string == NULL) | |
1551 | goto out_nomem; | |
1552 | ||
4fe9e963 | 1553 | if (strnlen(string, INET6_ADDRSTRLEN) > |
8830d7e0 SP |
1554 | INET6_ADDRSTRLEN) { |
1555 | printk(KERN_WARNING "CIFS: ip address " | |
1556 | "too long\n"); | |
1557 | goto cifs_parse_mount_err; | |
1558 | } | |
1559 | vol->UNCip = kstrdup(string, GFP_KERNEL); | |
1560 | if (!vol->UNCip) { | |
1561 | printk(KERN_WARNING "CIFS: no memory " | |
1562 | "for UNC IP\n"); | |
1563 | goto cifs_parse_mount_err; | |
1564 | } | |
1565 | break; | |
1566 | case Opt_unc: | |
1567 | string = match_strdup(args); | |
1568 | if (string == NULL) | |
1569 | goto out_nomem; | |
1570 | ||
8830d7e0 SP |
1571 | temp_len = strnlen(string, 300); |
1572 | if (temp_len == 300) { | |
1573 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
1574 | goto cifs_parse_mount_err; | |
1575 | } | |
1576 | ||
e4b41fb9 SP |
1577 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
1578 | if (vol->UNC == NULL) { | |
1579 | printk(KERN_WARNING "CIFS: no memory for UNC\n"); | |
1580 | goto cifs_parse_mount_err; | |
1581 | } | |
1582 | strcpy(vol->UNC, string); | |
1583 | ||
8830d7e0 | 1584 | if (strncmp(string, "//", 2) == 0) { |
1da177e4 LT |
1585 | vol->UNC[0] = '\\'; |
1586 | vol->UNC[1] = '\\'; | |
8830d7e0 | 1587 | } else if (strncmp(string, "\\\\", 2) != 0) { |
50c2f753 | 1588 | printk(KERN_WARNING "CIFS: UNC Path does not " |
8830d7e0 | 1589 | "begin with // or \\\\\n"); |
b946845a | 1590 | goto cifs_parse_mount_err; |
1da177e4 | 1591 | } |
8830d7e0 | 1592 | |
8830d7e0 SP |
1593 | break; |
1594 | case Opt_domain: | |
1595 | string = match_strdup(args); | |
1596 | if (string == NULL) | |
1597 | goto out_nomem; | |
1598 | ||
4fe9e963 | 1599 | if (strnlen(string, 256) == 256) { |
8830d7e0 SP |
1600 | printk(KERN_WARNING "CIFS: domain name too" |
1601 | " long\n"); | |
1602 | goto cifs_parse_mount_err; | |
1603 | } | |
1604 | ||
1605 | vol->domainname = kstrdup(string, GFP_KERNEL); | |
1606 | if (!vol->domainname) { | |
1607 | printk(KERN_WARNING "CIFS: no memory " | |
1608 | "for domainname\n"); | |
1609 | goto cifs_parse_mount_err; | |
1610 | } | |
1611 | cFYI(1, "Domain name set"); | |
1612 | break; | |
1613 | case Opt_srcaddr: | |
1614 | string = match_strdup(args); | |
1615 | if (string == NULL) | |
1616 | goto out_nomem; | |
1617 | ||
4fe9e963 | 1618 | if (!cifs_convert_address( |
8830d7e0 SP |
1619 | (struct sockaddr *)&vol->srcaddr, |
1620 | string, strlen(string))) { | |
1621 | printk(KERN_WARNING "CIFS: Could not parse" | |
1622 | " srcaddr: %s\n", string); | |
1623 | goto cifs_parse_mount_err; | |
1624 | } | |
1625 | break; | |
1626 | case Opt_prefixpath: | |
1627 | string = match_strdup(args); | |
1628 | if (string == NULL) | |
1629 | goto out_nomem; | |
1630 | ||
8830d7e0 SP |
1631 | temp_len = strnlen(string, 1024); |
1632 | if (string[0] != '/') | |
1633 | temp_len++; /* missing leading slash */ | |
1634 | if (temp_len > 1024) { | |
1635 | printk(KERN_WARNING "CIFS: prefix too long\n"); | |
1636 | goto cifs_parse_mount_err; | |
1637 | } | |
1638 | ||
1639 | vol->prepath = kmalloc(temp_len+1, GFP_KERNEL); | |
1640 | if (vol->prepath == NULL) { | |
1641 | printk(KERN_WARNING "CIFS: no memory " | |
1642 | "for path prefix\n"); | |
1643 | goto cifs_parse_mount_err; | |
1644 | } | |
1645 | ||
1646 | if (string[0] != '/') { | |
1647 | vol->prepath[0] = '/'; | |
1648 | strcpy(vol->prepath+1, string); | |
1649 | } else | |
1650 | strcpy(vol->prepath, string); | |
1651 | ||
1652 | break; | |
1653 | case Opt_iocharset: | |
1654 | string = match_strdup(args); | |
1655 | if (string == NULL) | |
1656 | goto out_nomem; | |
1657 | ||
4fe9e963 | 1658 | if (strnlen(string, 1024) >= 65) { |
8830d7e0 SP |
1659 | printk(KERN_WARNING "CIFS: iocharset name " |
1660 | "too long.\n"); | |
1661 | goto cifs_parse_mount_err; | |
1662 | } | |
1663 | ||
1664 | if (strnicmp(string, "default", 7) != 0) { | |
1665 | vol->iocharset = kstrdup(string, | |
1666 | GFP_KERNEL); | |
1667 | if (!vol->iocharset) { | |
1668 | printk(KERN_WARNING "CIFS: no memory" | |
1669 | "for charset\n"); | |
1670 | goto cifs_parse_mount_err; | |
1671 | } | |
1672 | } | |
1673 | /* if iocharset not set then load_nls_default | |
1674 | * is used by caller | |
1675 | */ | |
1676 | cFYI(1, "iocharset set to %s", string); | |
1677 | break; | |
1678 | case Opt_sockopt: | |
1679 | string = match_strdup(args); | |
1680 | if (string == NULL) | |
1681 | goto out_nomem; | |
1682 | ||
67c1f529 JL |
1683 | if (strnicmp(string, "TCP_NODELAY", 11) == 0) { |
1684 | printk(KERN_WARNING "CIFS: the " | |
1685 | "sockopt=TCP_NODELAY option has been " | |
1686 | "deprecated and will be removed " | |
1687 | "in 3.9\n"); | |
8830d7e0 | 1688 | vol->sockopt_tcp_nodelay = 1; |
67c1f529 | 1689 | } |
8830d7e0 SP |
1690 | break; |
1691 | case Opt_netbiosname: | |
1692 | string = match_strdup(args); | |
1693 | if (string == NULL) | |
1694 | goto out_nomem; | |
1695 | ||
8830d7e0 SP |
1696 | memset(vol->source_rfc1001_name, 0x20, |
1697 | RFC1001_NAME_LEN); | |
1698 | /* | |
1699 | * FIXME: are there cases in which a comma can | |
1700 | * be valid in workstation netbios name (and | |
1701 | * need special handling)? | |
1702 | */ | |
1703 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
1704 | /* don't ucase netbiosname for user */ | |
1705 | if (string[i] == 0) | |
1706 | break; | |
1707 | vol->source_rfc1001_name[i] = string[i]; | |
1708 | } | |
1709 | /* The string has 16th byte zero still from | |
1710 | * set at top of the function | |
1711 | */ | |
1712 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
1713 | printk(KERN_WARNING "CIFS: netbiosname" | |
1714 | " longer than 15 truncated.\n"); | |
1715 | ||
1716 | break; | |
1717 | case Opt_servern: | |
1718 | /* servernetbiosname specified override *SMBSERVER */ | |
1719 | string = match_strdup(args); | |
1720 | if (string == NULL) | |
1721 | goto out_nomem; | |
1722 | ||
8830d7e0 SP |
1723 | /* last byte, type, is 0x20 for servr type */ |
1724 | memset(vol->target_rfc1001_name, 0x20, | |
1725 | RFC1001_NAME_LEN_WITH_NULL); | |
1726 | ||
1727 | /* BB are there cases in which a comma can be | |
1728 | valid in this workstation netbios name | |
1729 | (and need special handling)? */ | |
1730 | ||
1731 | /* user or mount helper must uppercase the | |
1732 | netbios name */ | |
1733 | for (i = 0; i < 15; i++) { | |
1734 | if (string[i] == 0) | |
1735 | break; | |
1736 | vol->target_rfc1001_name[i] = string[i]; | |
1737 | } | |
1738 | /* The string has 16th byte zero still from | |
1739 | set at top of the function */ | |
1740 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
1741 | printk(KERN_WARNING "CIFS: server net" | |
1742 | "biosname longer than 15 truncated.\n"); | |
1743 | break; | |
1744 | case Opt_ver: | |
1745 | string = match_strdup(args); | |
1746 | if (string == NULL) | |
1747 | goto out_nomem; | |
1748 | ||
5249af32 | 1749 | if (strnicmp(string, "1", 1) == 0) { |
8830d7e0 SP |
1750 | /* This is the default */ |
1751 | break; | |
1752 | } | |
1753 | /* For all other value, error */ | |
1754 | printk(KERN_WARNING "CIFS: Invalid version" | |
1755 | " specified\n"); | |
b946845a | 1756 | goto cifs_parse_mount_err; |
23db65f5 JL |
1757 | case Opt_vers: |
1758 | string = match_strdup(args); | |
1759 | if (string == NULL) | |
1760 | goto out_nomem; | |
1761 | ||
1762 | if (cifs_parse_smb_version(string, vol) != 0) | |
1763 | goto cifs_parse_mount_err; | |
1764 | break; | |
8830d7e0 SP |
1765 | case Opt_sec: |
1766 | string = match_strdup(args); | |
1767 | if (string == NULL) | |
1768 | goto out_nomem; | |
1769 | ||
8830d7e0 SP |
1770 | if (cifs_parse_security_flavors(string, vol) != 0) |
1771 | goto cifs_parse_mount_err; | |
1772 | break; | |
15b6a473 | 1773 | case Opt_cache: |
296838b1 | 1774 | cache_specified = true; |
15b6a473 JL |
1775 | string = match_strdup(args); |
1776 | if (string == NULL) | |
1777 | goto out_nomem; | |
1778 | ||
1779 | if (cifs_parse_cache_flavor(string, vol) != 0) | |
1780 | goto cifs_parse_mount_err; | |
1781 | break; | |
8830d7e0 | 1782 | default: |
d8162558 JL |
1783 | /* |
1784 | * An option we don't recognize. Save it off for later | |
1785 | * if we haven't already found one | |
1786 | */ | |
1787 | if (!invalid) | |
1788 | invalid = data; | |
8830d7e0 | 1789 | break; |
1da177e4 | 1790 | } |
8830d7e0 SP |
1791 | /* Free up any allocated string */ |
1792 | kfree(string); | |
1793 | string = NULL; | |
1da177e4 | 1794 | } |
0eb8a132 | 1795 | |
d8162558 JL |
1796 | if (!sloppy && invalid) { |
1797 | printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid); | |
1798 | goto cifs_parse_mount_err; | |
1799 | } | |
1800 | ||
8a8798a5 JL |
1801 | #ifndef CONFIG_KEYS |
1802 | /* Muliuser mounts require CONFIG_KEYS support */ | |
1803 | if (vol->multiuser) { | |
1804 | cERROR(1, "Multiuser mounts require kernels with " | |
1805 | "CONFIG_KEYS enabled."); | |
b946845a | 1806 | goto cifs_parse_mount_err; |
0eb8a132 | 1807 | } |
8a8798a5 | 1808 | #endif |
0eb8a132 | 1809 | |
fb8c4b14 | 1810 | if (vol->UNCip == NULL) |
1da177e4 LT |
1811 | vol->UNCip = &vol->UNC[2]; |
1812 | ||
9b9d6b24 JL |
1813 | if (uid_specified) |
1814 | vol->override_uid = override_uid; | |
1815 | else if (override_uid == 1) | |
1816 | printk(KERN_NOTICE "CIFS: ignoring forceuid mount option " | |
1817 | "specified with no uid= option.\n"); | |
1818 | ||
1819 | if (gid_specified) | |
1820 | vol->override_gid = override_gid; | |
1821 | else if (override_gid == 1) | |
1822 | printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " | |
1823 | "specified with no gid= option.\n"); | |
1824 | ||
296838b1 JL |
1825 | /* FIXME: remove this block in 3.7 */ |
1826 | if (!cache_specified && !cache_warned) { | |
1827 | cache_warned = true; | |
1828 | printk(KERN_NOTICE "CIFS: no cache= option specified, using " | |
1829 | "\"cache=loose\". This default will change " | |
1830 | "to \"cache=strict\" in 3.7.\n"); | |
1831 | } | |
1832 | ||
b946845a | 1833 | kfree(mountdata_copy); |
1da177e4 | 1834 | return 0; |
b946845a | 1835 | |
8830d7e0 SP |
1836 | out_nomem: |
1837 | printk(KERN_WARNING "Could not allocate temporary buffer\n"); | |
b946845a | 1838 | cifs_parse_mount_err: |
8830d7e0 | 1839 | kfree(string); |
b946845a SF |
1840 | kfree(mountdata_copy); |
1841 | return 1; | |
1da177e4 LT |
1842 | } |
1843 | ||
3eb9a889 BG |
1844 | /** Returns true if srcaddr isn't specified and rhs isn't |
1845 | * specified, or if srcaddr is specified and | |
1846 | * matches the IP address of the rhs argument. | |
1847 | */ | |
1848 | static bool | |
1849 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
1850 | { | |
1851 | switch (srcaddr->sa_family) { | |
1852 | case AF_UNSPEC: | |
1853 | return (rhs->sa_family == AF_UNSPEC); | |
1854 | case AF_INET: { | |
1855 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
1856 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
1857 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
1858 | } | |
1859 | case AF_INET6: { | |
1860 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
1861 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs; | |
1862 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); | |
1863 | } | |
1864 | default: | |
1865 | WARN_ON(1); | |
1866 | return false; /* don't expect to be here */ | |
1867 | } | |
1868 | } | |
1869 | ||
4b886136 PS |
1870 | /* |
1871 | * If no port is specified in addr structure, we try to match with 445 port | |
1872 | * and if it fails - with 139 ports. It should be called only if address | |
1873 | * families of server and addr are equal. | |
1874 | */ | |
1875 | static bool | |
1876 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
1877 | { | |
6da97910 | 1878 | __be16 port, *sport; |
4b886136 PS |
1879 | |
1880 | switch (addr->sa_family) { | |
1881 | case AF_INET: | |
1882 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
1883 | port = ((struct sockaddr_in *) addr)->sin_port; | |
1884 | break; | |
1885 | case AF_INET6: | |
1886 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
1887 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
1888 | break; | |
1889 | default: | |
1890 | WARN_ON(1); | |
1891 | return false; | |
1892 | } | |
1893 | ||
1894 | if (!port) { | |
1895 | port = htons(CIFS_PORT); | |
1896 | if (port == *sport) | |
1897 | return true; | |
1898 | ||
1899 | port = htons(RFC1001_PORT); | |
1900 | } | |
1901 | ||
1902 | return port == *sport; | |
1903 | } | |
3eb9a889 | 1904 | |
4515148e | 1905 | static bool |
3eb9a889 BG |
1906 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
1907 | struct sockaddr *srcaddr) | |
4515148e | 1908 | { |
4515148e | 1909 | switch (addr->sa_family) { |
a9f1b85e PS |
1910 | case AF_INET: { |
1911 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
1912 | struct sockaddr_in *srv_addr4 = | |
1913 | (struct sockaddr_in *)&server->dstaddr; | |
1914 | ||
1915 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 1916 | return false; |
4515148e | 1917 | break; |
a9f1b85e PS |
1918 | } |
1919 | case AF_INET6: { | |
1920 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
1921 | struct sockaddr_in6 *srv_addr6 = | |
1922 | (struct sockaddr_in6 *)&server->dstaddr; | |
1923 | ||
4515148e | 1924 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 1925 | &srv_addr6->sin6_addr)) |
4515148e | 1926 | return false; |
a9f1b85e | 1927 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 1928 | return false; |
4515148e JL |
1929 | break; |
1930 | } | |
a9f1b85e PS |
1931 | default: |
1932 | WARN_ON(1); | |
1933 | return false; /* don't expect to be here */ | |
1934 | } | |
4515148e | 1935 | |
3eb9a889 BG |
1936 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
1937 | return false; | |
1938 | ||
4515148e JL |
1939 | return true; |
1940 | } | |
1941 | ||
daf5b0b6 JL |
1942 | static bool |
1943 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
1944 | { | |
1945 | unsigned int secFlags; | |
1946 | ||
1947 | if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
1948 | secFlags = vol->secFlg; | |
1949 | else | |
1950 | secFlags = global_secflags | vol->secFlg; | |
1951 | ||
1952 | switch (server->secType) { | |
1953 | case LANMAN: | |
1954 | if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT))) | |
1955 | return false; | |
1956 | break; | |
1957 | case NTLMv2: | |
1958 | if (!(secFlags & CIFSSEC_MAY_NTLMV2)) | |
1959 | return false; | |
1960 | break; | |
1961 | case NTLM: | |
1962 | if (!(secFlags & CIFSSEC_MAY_NTLM)) | |
1963 | return false; | |
1964 | break; | |
1965 | case Kerberos: | |
1966 | if (!(secFlags & CIFSSEC_MAY_KRB5)) | |
1967 | return false; | |
1968 | break; | |
1969 | case RawNTLMSSP: | |
1970 | if (!(secFlags & CIFSSEC_MAY_NTLMSSP)) | |
1971 | return false; | |
1972 | break; | |
1973 | default: | |
1974 | /* shouldn't happen */ | |
1975 | return false; | |
1976 | } | |
1977 | ||
25985edc | 1978 | /* now check if signing mode is acceptable */ |
daf5b0b6 | 1979 | if ((secFlags & CIFSSEC_MAY_SIGN) == 0 && |
96daf2b0 | 1980 | (server->sec_mode & SECMODE_SIGN_REQUIRED)) |
daf5b0b6 JL |
1981 | return false; |
1982 | else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) && | |
96daf2b0 | 1983 | (server->sec_mode & |
daf5b0b6 JL |
1984 | (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0) |
1985 | return false; | |
1986 | ||
1987 | return true; | |
1988 | } | |
1989 | ||
37bb04e5 PS |
1990 | static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr, |
1991 | struct smb_vol *vol) | |
1992 | { | |
23db65f5 JL |
1993 | if ((server->vals != vol->vals) || (server->ops != vol->ops)) |
1994 | return 0; | |
1995 | ||
37bb04e5 PS |
1996 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) |
1997 | return 0; | |
1998 | ||
1999 | if (!match_address(server, addr, | |
2000 | (struct sockaddr *)&vol->srcaddr)) | |
2001 | return 0; | |
2002 | ||
2003 | if (!match_port(server, addr)) | |
2004 | return 0; | |
2005 | ||
2006 | if (!match_security(server, vol)) | |
2007 | return 0; | |
2008 | ||
2009 | return 1; | |
2010 | } | |
2011 | ||
e7ddee90 | 2012 | static struct TCP_Server_Info * |
daf5b0b6 | 2013 | cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol) |
1da177e4 | 2014 | { |
e7ddee90 | 2015 | struct TCP_Server_Info *server; |
e7ddee90 | 2016 | |
3f9bcca7 | 2017 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 2018 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
37bb04e5 | 2019 | if (!match_server(server, addr, vol)) |
daf5b0b6 JL |
2020 | continue; |
2021 | ||
e7ddee90 | 2022 | ++server->srv_count; |
3f9bcca7 | 2023 | spin_unlock(&cifs_tcp_ses_lock); |
b6b38f70 | 2024 | cFYI(1, "Existing tcp session with server found"); |
e7ddee90 | 2025 | return server; |
1da177e4 | 2026 | } |
3f9bcca7 | 2027 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2028 | return NULL; |
2029 | } | |
1b20d672 | 2030 | |
14fbf50d | 2031 | static void |
e7ddee90 | 2032 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
1da177e4 | 2033 | { |
e7ddee90 | 2034 | struct task_struct *task; |
1b20d672 | 2035 | |
3f9bcca7 | 2036 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 2037 | if (--server->srv_count > 0) { |
3f9bcca7 | 2038 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 2039 | return; |
1da177e4 | 2040 | } |
1b20d672 | 2041 | |
f1d0c998 RL |
2042 | put_net(cifs_net_ns(server)); |
2043 | ||
e7ddee90 | 2044 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 2045 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2046 | |
c74093b6 JL |
2047 | cancel_delayed_work_sync(&server->echo); |
2048 | ||
e7ddee90 JL |
2049 | spin_lock(&GlobalMid_Lock); |
2050 | server->tcpStatus = CifsExiting; | |
2051 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 2052 | |
d2b91521 | 2053 | cifs_crypto_shash_release(server); |
488f1d2d SJ |
2054 | cifs_fscache_release_client_cookie(server); |
2055 | ||
21e73393 SP |
2056 | kfree(server->session_key.response); |
2057 | server->session_key.response = NULL; | |
2058 | server->session_key.len = 0; | |
2059 | ||
e7ddee90 JL |
2060 | task = xchg(&server->tsk, NULL); |
2061 | if (task) | |
2062 | force_sig(SIGKILL, task); | |
1da177e4 LT |
2063 | } |
2064 | ||
63c038c2 JL |
2065 | static struct TCP_Server_Info * |
2066 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
2067 | { | |
2068 | struct TCP_Server_Info *tcp_ses = NULL; | |
a9ac49d3 | 2069 | struct sockaddr_storage addr; |
63c038c2 JL |
2070 | struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr; |
2071 | struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr; | |
2072 | int rc; | |
2073 | ||
a9ac49d3 | 2074 | memset(&addr, 0, sizeof(struct sockaddr_storage)); |
63c038c2 | 2075 | |
b6b38f70 | 2076 | cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip); |
63c038c2 | 2077 | |
1e68b2b2 | 2078 | if (volume_info->UNCip && volume_info->UNC) { |
50d97160 JL |
2079 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, |
2080 | volume_info->UNCip, | |
67b7626a | 2081 | strlen(volume_info->UNCip), |
50d97160 | 2082 | volume_info->port); |
1e68b2b2 | 2083 | if (!rc) { |
63c038c2 JL |
2084 | /* we failed translating address */ |
2085 | rc = -EINVAL; | |
2086 | goto out_err; | |
2087 | } | |
63c038c2 JL |
2088 | } else if (volume_info->UNCip) { |
2089 | /* BB using ip addr as tcp_ses name to connect to the | |
2090 | DFS root below */ | |
b6b38f70 | 2091 | cERROR(1, "Connecting to DFS root not implemented yet"); |
63c038c2 JL |
2092 | rc = -EINVAL; |
2093 | goto out_err; | |
2094 | } else /* which tcp_sess DFS root would we conect to */ { | |
b6b38f70 JP |
2095 | cERROR(1, "CIFS mount error: No UNC path (e.g. -o " |
2096 | "unc=//192.168.1.100/public) specified"); | |
63c038c2 JL |
2097 | rc = -EINVAL; |
2098 | goto out_err; | |
2099 | } | |
2100 | ||
2101 | /* see if we already have a matching tcp_ses */ | |
daf5b0b6 | 2102 | tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info); |
63c038c2 JL |
2103 | if (tcp_ses) |
2104 | return tcp_ses; | |
2105 | ||
2106 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
2107 | if (!tcp_ses) { | |
2108 | rc = -ENOMEM; | |
2109 | goto out_err; | |
2110 | } | |
2111 | ||
d2b91521 SP |
2112 | rc = cifs_crypto_shash_allocate(tcp_ses); |
2113 | if (rc) { | |
2114 | cERROR(1, "could not setup hash structures rc %d", rc); | |
2115 | goto out_err; | |
2116 | } | |
2117 | ||
23db65f5 JL |
2118 | tcp_ses->ops = volume_info->ops; |
2119 | tcp_ses->vals = volume_info->vals; | |
f1d0c998 | 2120 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
2121 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
2122 | if (IS_ERR(tcp_ses->hostname)) { | |
2123 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 2124 | goto out_err_crypto_release; |
63c038c2 JL |
2125 | } |
2126 | ||
2127 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
2128 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 2129 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
fc40f9cf | 2130 | tcp_ses->in_flight = 0; |
2d86dbc9 | 2131 | tcp_ses->credits = 1; |
63c038c2 JL |
2132 | init_waitqueue_head(&tcp_ses->response_q); |
2133 | init_waitqueue_head(&tcp_ses->request_q); | |
2134 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
2135 | mutex_init(&tcp_ses->srv_mutex); | |
2136 | memcpy(tcp_ses->workstation_RFC1001_name, | |
2137 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
2138 | memcpy(tcp_ses->server_RFC1001_name, | |
2139 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 2140 | tcp_ses->session_estab = false; |
63c038c2 | 2141 | tcp_ses->sequence_number = 0; |
fda35943 | 2142 | tcp_ses->lstrp = jiffies; |
58fa015f | 2143 | spin_lock_init(&tcp_ses->req_lock); |
63c038c2 JL |
2144 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
2145 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 2146 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
63c038c2 JL |
2147 | |
2148 | /* | |
2149 | * at this point we are the only ones with the pointer | |
2150 | * to the struct since the kernel thread not created yet | |
2151 | * no need to spinlock this init of tcpStatus or srv_count | |
2152 | */ | |
2153 | tcp_ses->tcpStatus = CifsNew; | |
3eb9a889 BG |
2154 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
2155 | sizeof(tcp_ses->srcaddr)); | |
63c038c2 JL |
2156 | ++tcp_ses->srv_count; |
2157 | ||
a9ac49d3 | 2158 | if (addr.ss_family == AF_INET6) { |
b6b38f70 | 2159 | cFYI(1, "attempting ipv6 connect"); |
63c038c2 JL |
2160 | /* BB should we allow ipv6 on port 139? */ |
2161 | /* other OS never observed in Wild doing 139 with v6 */ | |
a9f1b85e PS |
2162 | memcpy(&tcp_ses->dstaddr, sin_server6, |
2163 | sizeof(struct sockaddr_in6)); | |
2164 | } else | |
2165 | memcpy(&tcp_ses->dstaddr, sin_server, | |
2166 | sizeof(struct sockaddr_in)); | |
2167 | ||
2168 | rc = ip_connect(tcp_ses); | |
63c038c2 | 2169 | if (rc < 0) { |
b6b38f70 | 2170 | cERROR(1, "Error connecting to socket. Aborting operation"); |
f7c5445a | 2171 | goto out_err_crypto_release; |
63c038c2 JL |
2172 | } |
2173 | ||
2174 | /* | |
2175 | * since we're in a cifs function already, we know that | |
2176 | * this will succeed. No need for try_module_get(). | |
2177 | */ | |
2178 | __module_get(THIS_MODULE); | |
7c97c200 | 2179 | tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, |
63c038c2 JL |
2180 | tcp_ses, "cifsd"); |
2181 | if (IS_ERR(tcp_ses->tsk)) { | |
2182 | rc = PTR_ERR(tcp_ses->tsk); | |
b6b38f70 | 2183 | cERROR(1, "error %d create cifsd thread", rc); |
63c038c2 | 2184 | module_put(THIS_MODULE); |
f7c5445a | 2185 | goto out_err_crypto_release; |
63c038c2 | 2186 | } |
fd88ce93 | 2187 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
63c038c2 JL |
2188 | |
2189 | /* thread spawned, put it on the list */ | |
3f9bcca7 | 2190 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 2191 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 2192 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 2193 | |
488f1d2d SJ |
2194 | cifs_fscache_get_client_cookie(tcp_ses); |
2195 | ||
c74093b6 | 2196 | /* queue echo request delayed work */ |
da472fc8 | 2197 | queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL); |
c74093b6 | 2198 | |
63c038c2 JL |
2199 | return tcp_ses; |
2200 | ||
f7c5445a | 2201 | out_err_crypto_release: |
d2b91521 SP |
2202 | cifs_crypto_shash_release(tcp_ses); |
2203 | ||
f1d0c998 RL |
2204 | put_net(cifs_net_ns(tcp_ses)); |
2205 | ||
63c038c2 JL |
2206 | out_err: |
2207 | if (tcp_ses) { | |
8347a5cd SF |
2208 | if (!IS_ERR(tcp_ses->hostname)) |
2209 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
2210 | if (tcp_ses->ssocket) |
2211 | sock_release(tcp_ses->ssocket); | |
2212 | kfree(tcp_ses); | |
2213 | } | |
2214 | return ERR_PTR(rc); | |
2215 | } | |
2216 | ||
96daf2b0 | 2217 | static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
37bb04e5 PS |
2218 | { |
2219 | switch (ses->server->secType) { | |
2220 | case Kerberos: | |
2221 | if (vol->cred_uid != ses->cred_uid) | |
2222 | return 0; | |
2223 | break; | |
2224 | default: | |
04febabc JL |
2225 | /* NULL username means anonymous session */ |
2226 | if (ses->user_name == NULL) { | |
2227 | if (!vol->nullauth) | |
2228 | return 0; | |
2229 | break; | |
2230 | } | |
2231 | ||
37bb04e5 | 2232 | /* anything else takes username/password */ |
04febabc JL |
2233 | if (strncmp(ses->user_name, |
2234 | vol->username ? vol->username : "", | |
37bb04e5 PS |
2235 | MAX_USERNAME_SIZE)) |
2236 | return 0; | |
2237 | if (strlen(vol->username) != 0 && | |
2238 | ses->password != NULL && | |
2239 | strncmp(ses->password, | |
2240 | vol->password ? vol->password : "", | |
2241 | MAX_PASSWORD_SIZE)) | |
2242 | return 0; | |
2243 | } | |
2244 | return 1; | |
2245 | } | |
2246 | ||
96daf2b0 | 2247 | static struct cifs_ses * |
4ff67b72 | 2248 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 2249 | { |
96daf2b0 | 2250 | struct cifs_ses *ses; |
dea570e0 | 2251 | |
3f9bcca7 | 2252 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 | 2253 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
37bb04e5 PS |
2254 | if (!match_session(ses, vol)) |
2255 | continue; | |
14fbf50d | 2256 | ++ses->ses_count; |
3f9bcca7 | 2257 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2258 | return ses; |
2259 | } | |
3f9bcca7 | 2260 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2261 | return NULL; |
2262 | } | |
dea570e0 | 2263 | |
14fbf50d | 2264 | static void |
96daf2b0 | 2265 | cifs_put_smb_ses(struct cifs_ses *ses) |
14fbf50d | 2266 | { |
58c45c58 | 2267 | unsigned int xid; |
14fbf50d | 2268 | struct TCP_Server_Info *server = ses->server; |
dea570e0 | 2269 | |
ac3aa2f8 | 2270 | cFYI(1, "%s: ses_count=%d", __func__, ses->ses_count); |
3f9bcca7 | 2271 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 2272 | if (--ses->ses_count > 0) { |
3f9bcca7 | 2273 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2274 | return; |
2275 | } | |
dea570e0 | 2276 | |
14fbf50d | 2277 | list_del_init(&ses->smb_ses_list); |
3f9bcca7 | 2278 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2279 | |
58c45c58 | 2280 | if (ses->status == CifsGood && server->ops->logoff) { |
6d5786a3 | 2281 | xid = get_xid(); |
58c45c58 | 2282 | server->ops->logoff(xid, ses); |
6d5786a3 | 2283 | _free_xid(xid); |
14fbf50d JL |
2284 | } |
2285 | sesInfoFree(ses); | |
2286 | cifs_put_tcp_session(server); | |
2287 | } | |
dea570e0 | 2288 | |
8a8798a5 JL |
2289 | #ifdef CONFIG_KEYS |
2290 | ||
2291 | /* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */ | |
2292 | #define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1) | |
2293 | ||
2294 | /* Populate username and pw fields from keyring if possible */ | |
2295 | static int | |
2296 | cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) | |
2297 | { | |
2298 | int rc = 0; | |
2299 | char *desc, *delim, *payload; | |
2300 | ssize_t len; | |
2301 | struct key *key; | |
2302 | struct TCP_Server_Info *server = ses->server; | |
2303 | struct sockaddr_in *sa; | |
2304 | struct sockaddr_in6 *sa6; | |
2305 | struct user_key_payload *upayload; | |
2306 | ||
2307 | desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL); | |
2308 | if (!desc) | |
2309 | return -ENOMEM; | |
2310 | ||
2311 | /* try to find an address key first */ | |
2312 | switch (server->dstaddr.ss_family) { | |
2313 | case AF_INET: | |
2314 | sa = (struct sockaddr_in *)&server->dstaddr; | |
2315 | sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr); | |
2316 | break; | |
2317 | case AF_INET6: | |
2318 | sa6 = (struct sockaddr_in6 *)&server->dstaddr; | |
2319 | sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr); | |
2320 | break; | |
2321 | default: | |
2322 | cFYI(1, "Bad ss_family (%hu)", server->dstaddr.ss_family); | |
2323 | rc = -EINVAL; | |
2324 | goto out_err; | |
2325 | } | |
2326 | ||
2327 | cFYI(1, "%s: desc=%s", __func__, desc); | |
2328 | key = request_key(&key_type_logon, desc, ""); | |
2329 | if (IS_ERR(key)) { | |
2330 | if (!ses->domainName) { | |
2331 | cFYI(1, "domainName is NULL"); | |
2332 | rc = PTR_ERR(key); | |
2333 | goto out_err; | |
2334 | } | |
2335 | ||
2336 | /* didn't work, try to find a domain key */ | |
2337 | sprintf(desc, "cifs:d:%s", ses->domainName); | |
2338 | cFYI(1, "%s: desc=%s", __func__, desc); | |
2339 | key = request_key(&key_type_logon, desc, ""); | |
2340 | if (IS_ERR(key)) { | |
2341 | rc = PTR_ERR(key); | |
2342 | goto out_err; | |
2343 | } | |
2344 | } | |
2345 | ||
2346 | down_read(&key->sem); | |
2347 | upayload = key->payload.data; | |
2348 | if (IS_ERR_OR_NULL(upayload)) { | |
4edc53c1 | 2349 | rc = upayload ? PTR_ERR(upayload) : -EINVAL; |
8a8798a5 JL |
2350 | goto out_key_put; |
2351 | } | |
2352 | ||
2353 | /* find first : in payload */ | |
2354 | payload = (char *)upayload->data; | |
2355 | delim = strnchr(payload, upayload->datalen, ':'); | |
2356 | cFYI(1, "payload=%s", payload); | |
2357 | if (!delim) { | |
2358 | cFYI(1, "Unable to find ':' in payload (datalen=%d)", | |
2359 | upayload->datalen); | |
2360 | rc = -EINVAL; | |
2361 | goto out_key_put; | |
2362 | } | |
2363 | ||
2364 | len = delim - payload; | |
2365 | if (len > MAX_USERNAME_SIZE || len <= 0) { | |
000f9bb8 | 2366 | cFYI(1, "Bad value from username search (len=%zd)", len); |
8a8798a5 JL |
2367 | rc = -EINVAL; |
2368 | goto out_key_put; | |
2369 | } | |
2370 | ||
2371 | vol->username = kstrndup(payload, len, GFP_KERNEL); | |
2372 | if (!vol->username) { | |
000f9bb8 | 2373 | cFYI(1, "Unable to allocate %zd bytes for username", len); |
8a8798a5 JL |
2374 | rc = -ENOMEM; |
2375 | goto out_key_put; | |
2376 | } | |
2377 | cFYI(1, "%s: username=%s", __func__, vol->username); | |
2378 | ||
2379 | len = key->datalen - (len + 1); | |
2380 | if (len > MAX_PASSWORD_SIZE || len <= 0) { | |
000f9bb8 | 2381 | cFYI(1, "Bad len for password search (len=%zd)", len); |
8a8798a5 JL |
2382 | rc = -EINVAL; |
2383 | kfree(vol->username); | |
2384 | vol->username = NULL; | |
2385 | goto out_key_put; | |
2386 | } | |
2387 | ||
2388 | ++delim; | |
2389 | vol->password = kstrndup(delim, len, GFP_KERNEL); | |
2390 | if (!vol->password) { | |
000f9bb8 | 2391 | cFYI(1, "Unable to allocate %zd bytes for password", len); |
8a8798a5 JL |
2392 | rc = -ENOMEM; |
2393 | kfree(vol->username); | |
2394 | vol->username = NULL; | |
2395 | goto out_key_put; | |
2396 | } | |
2397 | ||
2398 | out_key_put: | |
2399 | up_read(&key->sem); | |
2400 | key_put(key); | |
2401 | out_err: | |
2402 | kfree(desc); | |
2403 | cFYI(1, "%s: returning %d", __func__, rc); | |
2404 | return rc; | |
2405 | } | |
2406 | #else /* ! CONFIG_KEYS */ | |
2407 | static inline int | |
2408 | cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), | |
2409 | struct cifs_ses *ses __attribute__((unused))) | |
2410 | { | |
2411 | return -ENOSYS; | |
2412 | } | |
2413 | #endif /* CONFIG_KEYS */ | |
2414 | ||
d9b94201 SF |
2415 | static bool warned_on_ntlm; /* globals init to false automatically */ |
2416 | ||
96daf2b0 | 2417 | static struct cifs_ses * |
36988c76 JL |
2418 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
2419 | { | |
286170aa PS |
2420 | int rc = -ENOMEM; |
2421 | unsigned int xid; | |
96daf2b0 | 2422 | struct cifs_ses *ses; |
a9f1b85e PS |
2423 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
2424 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 | 2425 | |
6d5786a3 | 2426 | xid = get_xid(); |
36988c76 | 2427 | |
4ff67b72 | 2428 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 JL |
2429 | if (ses) { |
2430 | cFYI(1, "Existing smb sess found (status=%d)", ses->status); | |
2431 | ||
36988c76 | 2432 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
2433 | rc = cifs_negotiate_protocol(xid, ses); |
2434 | if (rc) { | |
2435 | mutex_unlock(&ses->session_mutex); | |
2436 | /* problem -- put our ses reference */ | |
2437 | cifs_put_smb_ses(ses); | |
6d5786a3 | 2438 | free_xid(xid); |
198b5682 JL |
2439 | return ERR_PTR(rc); |
2440 | } | |
36988c76 JL |
2441 | if (ses->need_reconnect) { |
2442 | cFYI(1, "Session needs reconnect"); | |
2443 | rc = cifs_setup_session(xid, ses, | |
2444 | volume_info->local_nls); | |
2445 | if (rc) { | |
2446 | mutex_unlock(&ses->session_mutex); | |
2447 | /* problem -- put our reference */ | |
2448 | cifs_put_smb_ses(ses); | |
6d5786a3 | 2449 | free_xid(xid); |
36988c76 JL |
2450 | return ERR_PTR(rc); |
2451 | } | |
2452 | } | |
2453 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
2454 | |
2455 | /* existing SMB ses has a server reference already */ | |
2456 | cifs_put_tcp_session(server); | |
6d5786a3 | 2457 | free_xid(xid); |
36988c76 JL |
2458 | return ses; |
2459 | } | |
2460 | ||
2461 | cFYI(1, "Existing smb sess not found"); | |
2462 | ses = sesInfoAlloc(); | |
2463 | if (ses == NULL) | |
2464 | goto get_ses_fail; | |
2465 | ||
2466 | /* new SMB session uses our server ref */ | |
2467 | ses->server = server; | |
a9f1b85e PS |
2468 | if (server->dstaddr.ss_family == AF_INET6) |
2469 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 2470 | else |
a9f1b85e | 2471 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 2472 | |
8727c8a8 SF |
2473 | if (volume_info->username) { |
2474 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
2475 | if (!ses->user_name) | |
2476 | goto get_ses_fail; | |
2477 | } | |
36988c76 JL |
2478 | |
2479 | /* volume_info->password freed at unmount */ | |
2480 | if (volume_info->password) { | |
2481 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2482 | if (!ses->password) | |
2483 | goto get_ses_fail; | |
2484 | } | |
2485 | if (volume_info->domainname) { | |
d3686d54 SP |
2486 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
2487 | if (!ses->domainName) | |
2488 | goto get_ses_fail; | |
36988c76 | 2489 | } |
3e4b3e1f | 2490 | ses->cred_uid = volume_info->cred_uid; |
36988c76 | 2491 | ses->linux_uid = volume_info->linux_uid; |
d9b94201 SF |
2492 | |
2493 | /* ntlmv2 is much stronger than ntlm security, and has been broadly | |
2494 | supported for many years, time to update default security mechanism */ | |
2495 | if ((volume_info->secFlg == 0) && warned_on_ntlm == false) { | |
2496 | warned_on_ntlm = true; | |
2497 | cERROR(1, "default security mechanism requested. The default " | |
2498 | "security mechanism will be upgraded from ntlm to " | |
225de11e | 2499 | "ntlmv2 in kernel release 3.3"); |
d9b94201 | 2500 | } |
36988c76 JL |
2501 | ses->overrideSecFlg = volume_info->secFlg; |
2502 | ||
2503 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
2504 | rc = cifs_negotiate_protocol(xid, ses); |
2505 | if (!rc) | |
2506 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 2507 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 2508 | if (rc) |
36988c76 JL |
2509 | goto get_ses_fail; |
2510 | ||
2511 | /* success, put it on the list */ | |
3f9bcca7 | 2512 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 2513 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 2514 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 | 2515 | |
6d5786a3 | 2516 | free_xid(xid); |
36988c76 JL |
2517 | return ses; |
2518 | ||
2519 | get_ses_fail: | |
2520 | sesInfoFree(ses); | |
6d5786a3 | 2521 | free_xid(xid); |
36988c76 JL |
2522 | return ERR_PTR(rc); |
2523 | } | |
2524 | ||
96daf2b0 | 2525 | static int match_tcon(struct cifs_tcon *tcon, const char *unc) |
37bb04e5 PS |
2526 | { |
2527 | if (tcon->tidStatus == CifsExiting) | |
2528 | return 0; | |
2529 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) | |
2530 | return 0; | |
2531 | return 1; | |
2532 | } | |
2533 | ||
96daf2b0 SF |
2534 | static struct cifs_tcon * |
2535 | cifs_find_tcon(struct cifs_ses *ses, const char *unc) | |
f1987b44 JL |
2536 | { |
2537 | struct list_head *tmp; | |
96daf2b0 | 2538 | struct cifs_tcon *tcon; |
f1987b44 | 2539 | |
3f9bcca7 | 2540 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2541 | list_for_each(tmp, &ses->tcon_list) { |
96daf2b0 | 2542 | tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
37bb04e5 | 2543 | if (!match_tcon(tcon, unc)) |
f1987b44 | 2544 | continue; |
f1987b44 | 2545 | ++tcon->tc_count; |
3f9bcca7 | 2546 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2547 | return tcon; |
1da177e4 | 2548 | } |
3f9bcca7 | 2549 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2550 | return NULL; |
2551 | } | |
2552 | ||
f1987b44 | 2553 | static void |
96daf2b0 | 2554 | cifs_put_tcon(struct cifs_tcon *tcon) |
f1987b44 | 2555 | { |
2e6e02ab | 2556 | unsigned int xid; |
96daf2b0 | 2557 | struct cifs_ses *ses = tcon->ses; |
f1987b44 | 2558 | |
ac3aa2f8 | 2559 | cFYI(1, "%s: tc_count=%d", __func__, tcon->tc_count); |
3f9bcca7 | 2560 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2561 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 2562 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2563 | return; |
2564 | } | |
2565 | ||
2566 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 2567 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 | 2568 | |
6d5786a3 | 2569 | xid = get_xid(); |
2e6e02ab PS |
2570 | if (ses->server->ops->tree_disconnect) |
2571 | ses->server->ops->tree_disconnect(xid, tcon); | |
6d5786a3 | 2572 | _free_xid(xid); |
f1987b44 | 2573 | |
d03382ce | 2574 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 2575 | tconInfoFree(tcon); |
f1987b44 JL |
2576 | cifs_put_smb_ses(ses); |
2577 | } | |
2578 | ||
96daf2b0 SF |
2579 | static struct cifs_tcon * |
2580 | cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) | |
d00c28de JL |
2581 | { |
2582 | int rc, xid; | |
96daf2b0 | 2583 | struct cifs_tcon *tcon; |
d00c28de JL |
2584 | |
2585 | tcon = cifs_find_tcon(ses, volume_info->UNC); | |
2586 | if (tcon) { | |
2587 | cFYI(1, "Found match on UNC path"); | |
2588 | /* existing tcon already has a reference */ | |
2589 | cifs_put_smb_ses(ses); | |
2590 | if (tcon->seal != volume_info->seal) | |
2591 | cERROR(1, "transport encryption setting " | |
2592 | "conflicts with existing tid"); | |
2593 | return tcon; | |
2594 | } | |
2595 | ||
2e6e02ab PS |
2596 | if (!ses->server->ops->tree_connect) { |
2597 | rc = -ENOSYS; | |
2598 | goto out_fail; | |
2599 | } | |
2600 | ||
d00c28de JL |
2601 | tcon = tconInfoAlloc(); |
2602 | if (tcon == NULL) { | |
2603 | rc = -ENOMEM; | |
2604 | goto out_fail; | |
2605 | } | |
2606 | ||
2607 | tcon->ses = ses; | |
2608 | if (volume_info->password) { | |
2609 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2610 | if (!tcon->password) { | |
2611 | rc = -ENOMEM; | |
2612 | goto out_fail; | |
2613 | } | |
2614 | } | |
2615 | ||
2616 | if (strchr(volume_info->UNC + 3, '\\') == NULL | |
2617 | && strchr(volume_info->UNC + 3, '/') == NULL) { | |
2618 | cERROR(1, "Missing share name"); | |
2619 | rc = -ENODEV; | |
2620 | goto out_fail; | |
2621 | } | |
2622 | ||
2e6e02ab PS |
2623 | /* |
2624 | * BB Do we need to wrap session_mutex around this TCon call and Unix | |
2625 | * SetFS as we do on SessSetup and reconnect? | |
2626 | */ | |
6d5786a3 | 2627 | xid = get_xid(); |
2e6e02ab PS |
2628 | rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon, |
2629 | volume_info->local_nls); | |
6d5786a3 | 2630 | free_xid(xid); |
2e6e02ab | 2631 | cFYI(1, "Tcon rc = %d", rc); |
d00c28de JL |
2632 | if (rc) |
2633 | goto out_fail; | |
2634 | ||
2635 | if (volume_info->nodfs) { | |
2636 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
2637 | cFYI(1, "DFS disabled (%d)", tcon->Flags); | |
2638 | } | |
2639 | tcon->seal = volume_info->seal; | |
2e6e02ab PS |
2640 | /* |
2641 | * We can have only one retry value for a connection to a share so for | |
2642 | * resources mounted more than once to the same server share the last | |
2643 | * value passed in for the retry flag is used. | |
2644 | */ | |
d00c28de JL |
2645 | tcon->retry = volume_info->retry; |
2646 | tcon->nocase = volume_info->nocase; | |
2647 | tcon->local_lease = volume_info->local_lease; | |
233839b1 | 2648 | INIT_LIST_HEAD(&tcon->pending_opens); |
d00c28de | 2649 | |
3f9bcca7 | 2650 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 2651 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 2652 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 2653 | |
d03382ce SJ |
2654 | cifs_fscache_get_super_cookie(tcon); |
2655 | ||
d00c28de JL |
2656 | return tcon; |
2657 | ||
2658 | out_fail: | |
2659 | tconInfoFree(tcon); | |
2660 | return ERR_PTR(rc); | |
2661 | } | |
2662 | ||
9d002df4 JL |
2663 | void |
2664 | cifs_put_tlink(struct tcon_link *tlink) | |
2665 | { | |
2666 | if (!tlink || IS_ERR(tlink)) | |
2667 | return; | |
2668 | ||
2669 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
2670 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
2671 | tlink->tl_time = jiffies; | |
2672 | return; | |
2673 | } | |
2674 | ||
2675 | if (!IS_ERR(tlink_tcon(tlink))) | |
2676 | cifs_put_tcon(tlink_tcon(tlink)); | |
2677 | kfree(tlink); | |
2678 | return; | |
2679 | } | |
d00c28de | 2680 | |
25c7f41e | 2681 | static inline struct tcon_link * |
cd51875d PS |
2682 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
2683 | { | |
2684 | return cifs_sb->master_tlink; | |
2685 | } | |
25c7f41e PS |
2686 | |
2687 | static int | |
2688 | compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
2689 | { | |
2690 | struct cifs_sb_info *old = CIFS_SB(sb); | |
2691 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
2692 | ||
2693 | if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) | |
2694 | return 0; | |
2695 | ||
2696 | if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) != | |
2697 | (new->mnt_cifs_flags & CIFS_MOUNT_MASK)) | |
2698 | return 0; | |
2699 | ||
25c7f41e | 2700 | /* |
5eba8ab3 JL |
2701 | * We want to share sb only if we don't specify an r/wsize or |
2702 | * specified r/wsize is greater than or equal to existing one. | |
25c7f41e PS |
2703 | */ |
2704 | if (new->wsize && new->wsize < old->wsize) | |
2705 | return 0; | |
2706 | ||
5eba8ab3 JL |
2707 | if (new->rsize && new->rsize < old->rsize) |
2708 | return 0; | |
2709 | ||
25c7f41e PS |
2710 | if (old->mnt_uid != new->mnt_uid || old->mnt_gid != new->mnt_gid) |
2711 | return 0; | |
2712 | ||
2713 | if (old->mnt_file_mode != new->mnt_file_mode || | |
2714 | old->mnt_dir_mode != new->mnt_dir_mode) | |
2715 | return 0; | |
2716 | ||
2717 | if (strcmp(old->local_nls->charset, new->local_nls->charset)) | |
2718 | return 0; | |
2719 | ||
2720 | if (old->actimeo != new->actimeo) | |
2721 | return 0; | |
2722 | ||
2723 | return 1; | |
2724 | } | |
2725 | ||
2726 | int | |
2727 | cifs_match_super(struct super_block *sb, void *data) | |
2728 | { | |
2729 | struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; | |
2730 | struct smb_vol *volume_info; | |
2731 | struct cifs_sb_info *cifs_sb; | |
2732 | struct TCP_Server_Info *tcp_srv; | |
96daf2b0 SF |
2733 | struct cifs_ses *ses; |
2734 | struct cifs_tcon *tcon; | |
25c7f41e PS |
2735 | struct tcon_link *tlink; |
2736 | struct sockaddr_storage addr; | |
2737 | int rc = 0; | |
2738 | ||
2739 | memset(&addr, 0, sizeof(struct sockaddr_storage)); | |
2740 | ||
2741 | spin_lock(&cifs_tcp_ses_lock); | |
2742 | cifs_sb = CIFS_SB(sb); | |
2743 | tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
2744 | if (IS_ERR(tlink)) { | |
2745 | spin_unlock(&cifs_tcp_ses_lock); | |
2746 | return rc; | |
2747 | } | |
2748 | tcon = tlink_tcon(tlink); | |
2749 | ses = tcon->ses; | |
2750 | tcp_srv = ses->server; | |
2751 | ||
2752 | volume_info = mnt_data->vol; | |
2753 | ||
2754 | if (!volume_info->UNCip || !volume_info->UNC) | |
2755 | goto out; | |
2756 | ||
2757 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, | |
2758 | volume_info->UNCip, | |
2759 | strlen(volume_info->UNCip), | |
2760 | volume_info->port); | |
2761 | if (!rc) | |
2762 | goto out; | |
2763 | ||
2764 | if (!match_server(tcp_srv, (struct sockaddr *)&addr, volume_info) || | |
2765 | !match_session(ses, volume_info) || | |
2766 | !match_tcon(tcon, volume_info->UNC)) { | |
2767 | rc = 0; | |
2768 | goto out; | |
2769 | } | |
2770 | ||
2771 | rc = compare_mount_options(sb, mnt_data); | |
2772 | out: | |
25c7f41e | 2773 | spin_unlock(&cifs_tcp_ses_lock); |
f484b5d0 | 2774 | cifs_put_tlink(tlink); |
25c7f41e PS |
2775 | return rc; |
2776 | } | |
2777 | ||
1da177e4 | 2778 | int |
b669f33c | 2779 | get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path, |
2e6e02ab PS |
2780 | const struct nls_table *nls_codepage, unsigned int *num_referrals, |
2781 | struct dfs_info3_param **referrals, int remap) | |
1da177e4 LT |
2782 | { |
2783 | char *temp_unc; | |
2784 | int rc = 0; | |
2785 | ||
b669f33c | 2786 | if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer) |
2e6e02ab PS |
2787 | return -ENOSYS; |
2788 | ||
2789 | *num_referrals = 0; | |
2790 | *referrals = NULL; | |
1da177e4 | 2791 | |
2e6e02ab | 2792 | if (ses->ipc_tid == 0) { |
1da177e4 | 2793 | temp_unc = kmalloc(2 /* for slashes */ + |
2e6e02ab PS |
2794 | strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2) |
2795 | + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL); | |
1da177e4 LT |
2796 | if (temp_unc == NULL) |
2797 | return -ENOMEM; | |
2798 | temp_unc[0] = '\\'; | |
2799 | temp_unc[1] = '\\'; | |
2e6e02ab PS |
2800 | strcpy(temp_unc + 2, ses->serverName); |
2801 | strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$"); | |
2802 | rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL, | |
2803 | nls_codepage); | |
2804 | cFYI(1, "Tcon rc = %d ipc_tid = %d", rc, ses->ipc_tid); | |
1da177e4 LT |
2805 | kfree(temp_unc); |
2806 | } | |
2807 | if (rc == 0) | |
b669f33c PS |
2808 | rc = ses->server->ops->get_dfs_refer(xid, ses, old_path, |
2809 | referrals, num_referrals, | |
2810 | nls_codepage, remap); | |
2e6e02ab PS |
2811 | /* |
2812 | * BB - map targetUNCs to dfs_info3 structures, here or in | |
b669f33c | 2813 | * ses->server->ops->get_dfs_refer. |
2e6e02ab | 2814 | */ |
1da177e4 LT |
2815 | |
2816 | return rc; | |
2817 | } | |
2818 | ||
09e50d55 JL |
2819 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
2820 | static struct lock_class_key cifs_key[2]; | |
2821 | static struct lock_class_key cifs_slock_key[2]; | |
2822 | ||
2823 | static inline void | |
2824 | cifs_reclassify_socket4(struct socket *sock) | |
2825 | { | |
2826 | struct sock *sk = sock->sk; | |
2827 | BUG_ON(sock_owned_by_user(sk)); | |
2828 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", | |
2829 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
2830 | } | |
2831 | ||
2832 | static inline void | |
2833 | cifs_reclassify_socket6(struct socket *sock) | |
2834 | { | |
2835 | struct sock *sk = sock->sk; | |
2836 | BUG_ON(sock_owned_by_user(sk)); | |
2837 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", | |
2838 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
2839 | } | |
2840 | #else | |
2841 | static inline void | |
2842 | cifs_reclassify_socket4(struct socket *sock) | |
2843 | { | |
2844 | } | |
2845 | ||
2846 | static inline void | |
2847 | cifs_reclassify_socket6(struct socket *sock) | |
2848 | { | |
2849 | } | |
2850 | #endif | |
2851 | ||
1da177e4 | 2852 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 2853 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 2854 | { |
50c2f753 | 2855 | unsigned int i, j; |
1da177e4 | 2856 | |
50c2f753 | 2857 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
2858 | /* mask a nibble at a time and encode */ |
2859 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
2860 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 2861 | j += 2; |
1da177e4 LT |
2862 | } |
2863 | ||
2864 | } | |
2865 | ||
3eb9a889 BG |
2866 | static int |
2867 | bind_socket(struct TCP_Server_Info *server) | |
2868 | { | |
2869 | int rc = 0; | |
2870 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
2871 | /* Bind to the specified local IP address */ | |
2872 | struct socket *socket = server->ssocket; | |
2873 | rc = socket->ops->bind(socket, | |
2874 | (struct sockaddr *) &server->srcaddr, | |
2875 | sizeof(server->srcaddr)); | |
2876 | if (rc < 0) { | |
2877 | struct sockaddr_in *saddr4; | |
2878 | struct sockaddr_in6 *saddr6; | |
2879 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
2880 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
2881 | if (saddr6->sin6_family == AF_INET6) | |
2882 | cERROR(1, "cifs: " | |
ac3aa2f8 | 2883 | "Failed to bind to: %pI6c, error: %d", |
3eb9a889 BG |
2884 | &saddr6->sin6_addr, rc); |
2885 | else | |
2886 | cERROR(1, "cifs: " | |
ac3aa2f8 | 2887 | "Failed to bind to: %pI4, error: %d", |
3eb9a889 BG |
2888 | &saddr4->sin_addr.s_addr, rc); |
2889 | } | |
2890 | } | |
2891 | return rc; | |
2892 | } | |
1da177e4 LT |
2893 | |
2894 | static int | |
a9f1b85e | 2895 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
2896 | { |
2897 | int rc = 0; | |
a9f1b85e PS |
2898 | /* |
2899 | * some servers require RFC1001 sessinit before sending | |
2900 | * negprot - BB check reconnection in case where second | |
2901 | * sessinit is sent but no second negprot | |
2902 | */ | |
2903 | struct rfc1002_session_packet *ses_init_buf; | |
2904 | struct smb_hdr *smb_buf; | |
2905 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
2906 | GFP_KERNEL); | |
2907 | if (ses_init_buf) { | |
2908 | ses_init_buf->trailer.session_req.called_len = 32; | |
2909 | ||
2910 | if (server->server_RFC1001_name && | |
2911 | server->server_RFC1001_name[0] != 0) | |
2912 | rfc1002mangle(ses_init_buf->trailer. | |
2913 | session_req.called_name, | |
2914 | server->server_RFC1001_name, | |
2915 | RFC1001_NAME_LEN_WITH_NULL); | |
2916 | else | |
2917 | rfc1002mangle(ses_init_buf->trailer. | |
2918 | session_req.called_name, | |
2919 | DEFAULT_CIFS_CALLED_NAME, | |
2920 | RFC1001_NAME_LEN_WITH_NULL); | |
2921 | ||
2922 | ses_init_buf->trailer.session_req.calling_len = 32; | |
2923 | ||
2924 | /* | |
2925 | * calling name ends in null (byte 16) from old smb | |
2926 | * convention. | |
2927 | */ | |
2928 | if (server->workstation_RFC1001_name && | |
2929 | server->workstation_RFC1001_name[0] != 0) | |
2930 | rfc1002mangle(ses_init_buf->trailer. | |
2931 | session_req.calling_name, | |
2932 | server->workstation_RFC1001_name, | |
2933 | RFC1001_NAME_LEN_WITH_NULL); | |
2934 | else | |
2935 | rfc1002mangle(ses_init_buf->trailer. | |
2936 | session_req.calling_name, | |
2937 | "LINUX_CIFS_CLNT", | |
2938 | RFC1001_NAME_LEN_WITH_NULL); | |
2939 | ||
2940 | ses_init_buf->trailer.session_req.scope1 = 0; | |
2941 | ses_init_buf->trailer.session_req.scope2 = 0; | |
2942 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
2943 | ||
2944 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
be8e3b00 | 2945 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
a9f1b85e PS |
2946 | rc = smb_send(server, smb_buf, 0x44); |
2947 | kfree(ses_init_buf); | |
2948 | /* | |
2949 | * RFC1001 layer in at least one server | |
2950 | * requires very short break before negprot | |
2951 | * presumably because not expecting negprot | |
2952 | * to follow so fast. This is a simple | |
2953 | * solution that works without | |
2954 | * complicating the code and causes no | |
2955 | * significant slowing down on mount | |
2956 | * for everyone else | |
2957 | */ | |
2958 | usleep_range(1000, 2000); | |
2959 | } | |
2960 | /* | |
2961 | * else the negprot may still work without this | |
2962 | * even though malloc failed | |
2963 | */ | |
2964 | ||
2965 | return rc; | |
2966 | } | |
2967 | ||
2968 | static int | |
2969 | generic_ip_connect(struct TCP_Server_Info *server) | |
2970 | { | |
2971 | int rc = 0; | |
6da97910 | 2972 | __be16 sport; |
a9f1b85e | 2973 | int slen, sfamily; |
bcf4b106 | 2974 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
2975 | struct sockaddr *saddr; |
2976 | ||
2977 | saddr = (struct sockaddr *) &server->dstaddr; | |
2978 | ||
2979 | if (server->dstaddr.ss_family == AF_INET6) { | |
2980 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
2981 | slen = sizeof(struct sockaddr_in6); | |
2982 | sfamily = AF_INET6; | |
2983 | } else { | |
2984 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
2985 | slen = sizeof(struct sockaddr_in); | |
2986 | sfamily = AF_INET; | |
2987 | } | |
1da177e4 | 2988 | |
bcf4b106 | 2989 | if (socket == NULL) { |
f1d0c998 RL |
2990 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
2991 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 2992 | if (rc < 0) { |
b6b38f70 | 2993 | cERROR(1, "Error %d creating socket", rc); |
a9f1b85e | 2994 | server->ssocket = NULL; |
1da177e4 | 2995 | return rc; |
1da177e4 | 2996 | } |
bcf4b106 JL |
2997 | |
2998 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
b6b38f70 | 2999 | cFYI(1, "Socket created"); |
bcf4b106 JL |
3000 | server->ssocket = socket; |
3001 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
3002 | if (sfamily == AF_INET6) |
3003 | cifs_reclassify_socket6(socket); | |
3004 | else | |
3005 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
3006 | } |
3007 | ||
3eb9a889 BG |
3008 | rc = bind_socket(server); |
3009 | if (rc < 0) | |
3010 | return rc; | |
3011 | ||
bcf4b106 JL |
3012 | /* |
3013 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
3014 | * the default. sock_setsockopt not used because it expects |
3015 | * user space buffer | |
bcf4b106 JL |
3016 | */ |
3017 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 3018 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 3019 | |
b387eaeb | 3020 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
3021 | if (server->noautotune) { |
3022 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
3023 | socket->sk->sk_sndbuf = 200 * 1024; | |
3024 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
3025 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 3026 | } |
1da177e4 | 3027 | |
6a5fa236 | 3028 | if (server->tcp_nodelay) { |
a9f1b85e | 3029 | int val = 1; |
6a5fa236 SF |
3030 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
3031 | (char *)&val, sizeof(val)); | |
3032 | if (rc) | |
b6b38f70 | 3033 | cFYI(1, "set TCP_NODELAY socket option error %d", rc); |
6a5fa236 SF |
3034 | } |
3035 | ||
b6b38f70 | 3036 | cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx", |
bcf4b106 | 3037 | socket->sk->sk_sndbuf, |
b6b38f70 | 3038 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 3039 | |
ee1b3ea9 JL |
3040 | rc = socket->ops->connect(socket, saddr, slen, 0); |
3041 | if (rc < 0) { | |
3042 | cFYI(1, "Error %d connecting to server", rc); | |
3043 | sock_release(socket); | |
3044 | server->ssocket = NULL; | |
3045 | return rc; | |
3046 | } | |
3047 | ||
a9f1b85e PS |
3048 | if (sport == htons(RFC1001_PORT)) |
3049 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 3050 | |
1da177e4 LT |
3051 | return rc; |
3052 | } | |
3053 | ||
3054 | static int | |
a9f1b85e | 3055 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 3056 | { |
6da97910 | 3057 | __be16 *sport; |
a9f1b85e PS |
3058 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
3059 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 3060 | |
a9f1b85e PS |
3061 | if (server->dstaddr.ss_family == AF_INET6) |
3062 | sport = &addr6->sin6_port; | |
3063 | else | |
3064 | sport = &addr->sin_port; | |
1da177e4 | 3065 | |
a9f1b85e PS |
3066 | if (*sport == 0) { |
3067 | int rc; | |
1da177e4 | 3068 | |
a9f1b85e PS |
3069 | /* try with 445 port at first */ |
3070 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 3071 | |
a9f1b85e | 3072 | rc = generic_ip_connect(server); |
1da177e4 | 3073 | if (rc >= 0) |
a9f1b85e | 3074 | return rc; |
6a5fa236 | 3075 | |
a9f1b85e PS |
3076 | /* if it failed, try with 139 port */ |
3077 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
3078 | } |
3079 | ||
a9f1b85e | 3080 | return generic_ip_connect(server); |
1da177e4 LT |
3081 | } |
3082 | ||
6d5786a3 | 3083 | void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon, |
2c6292ae | 3084 | struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) |
8af18971 SF |
3085 | { |
3086 | /* if we are reconnecting then should we check to see if | |
3087 | * any requested capabilities changed locally e.g. via | |
3088 | * remount but we can not do much about it here | |
3089 | * if they have (even if we could detect it by the following) | |
3090 | * Perhaps we could add a backpointer to array of sb from tcon | |
3091 | * or if we change to make all sb to same share the same | |
3092 | * sb as NFS - then we only have one backpointer to sb. | |
3093 | * What if we wanted to mount the server share twice once with | |
3094 | * and once without posixacls or posix paths? */ | |
3095 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 3096 | |
c18c842b SF |
3097 | if (vol_info && vol_info->no_linux_ext) { |
3098 | tcon->fsUnixInfo.Capability = 0; | |
3099 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
b6b38f70 | 3100 | cFYI(1, "Linux protocol extensions disabled"); |
c18c842b SF |
3101 | return; |
3102 | } else if (vol_info) | |
3103 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
3104 | ||
3105 | if (tcon->unix_ext == 0) { | |
b6b38f70 | 3106 | cFYI(1, "Unix extensions disabled so not set on reconnect"); |
c18c842b SF |
3107 | return; |
3108 | } | |
50c2f753 | 3109 | |
fb8c4b14 | 3110 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 3111 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
6848b733 | 3112 | cFYI(1, "unix caps which server supports %lld", cap); |
8af18971 SF |
3113 | /* check for reconnect case in which we do not |
3114 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 3115 | if (vol_info == NULL) { |
50c2f753 | 3116 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
3117 | originally at mount time */ |
3118 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
3119 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
3120 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
3121 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
b6b38f70 | 3122 | cERROR(1, "POSIXPATH support change"); |
8af18971 | 3123 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 3124 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
b6b38f70 JP |
3125 | cERROR(1, "possible reconnect error"); |
3126 | cERROR(1, "server disabled POSIX path support"); | |
11b6d645 | 3127 | } |
8af18971 | 3128 | } |
50c2f753 | 3129 | |
6848b733 SF |
3130 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
3131 | cERROR(1, "per-share encryption not supported yet"); | |
3132 | ||
8af18971 | 3133 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 3134 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 3135 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 3136 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
b6b38f70 | 3137 | cFYI(1, "negotiated posix acl support"); |
2c6292ae AV |
3138 | if (cifs_sb) |
3139 | cifs_sb->mnt_cifs_flags |= | |
3140 | CIFS_MOUNT_POSIXACL; | |
8af18971 SF |
3141 | } |
3142 | ||
75865f8c | 3143 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 3144 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 3145 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
b6b38f70 | 3146 | cFYI(1, "negotiate posix pathnames"); |
2c6292ae AV |
3147 | if (cifs_sb) |
3148 | cifs_sb->mnt_cifs_flags |= | |
8af18971 SF |
3149 | CIFS_MOUNT_POSIX_PATHS; |
3150 | } | |
50c2f753 | 3151 | |
b6b38f70 | 3152 | cFYI(1, "Negotiate caps 0x%x", (int)cap); |
8af18971 | 3153 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 3154 | if (cap & CIFS_UNIX_FCNTL_CAP) |
b6b38f70 | 3155 | cFYI(1, "FCNTL cap"); |
75865f8c | 3156 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
b6b38f70 | 3157 | cFYI(1, "EXTATTR cap"); |
75865f8c | 3158 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
b6b38f70 | 3159 | cFYI(1, "POSIX path cap"); |
75865f8c | 3160 | if (cap & CIFS_UNIX_XATTR_CAP) |
b6b38f70 | 3161 | cFYI(1, "XATTR cap"); |
75865f8c | 3162 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
b6b38f70 | 3163 | cFYI(1, "POSIX ACL cap"); |
75865f8c | 3164 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
b6b38f70 | 3165 | cFYI(1, "very large read cap"); |
75865f8c | 3166 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
b6b38f70 | 3167 | cFYI(1, "very large write cap"); |
6848b733 SF |
3168 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
3169 | cFYI(1, "transport encryption cap"); | |
3170 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) | |
3171 | cFYI(1, "mandatory transport encryption cap"); | |
8af18971 SF |
3172 | #endif /* CIFS_DEBUG2 */ |
3173 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 3174 | if (vol_info == NULL) { |
b6b38f70 | 3175 | cFYI(1, "resetting capabilities failed"); |
442aa310 | 3176 | } else |
b6b38f70 | 3177 | cERROR(1, "Negotiating Unix capabilities " |
ac3aa2f8 JL |
3178 | "with the server failed. Consider " |
3179 | "mounting with the Unix Extensions " | |
3180 | "disabled if problems are found " | |
5a44b319 | 3181 | "by specifying the nounix mount " |
b6b38f70 | 3182 | "option."); |
5a44b319 | 3183 | |
8af18971 SF |
3184 | } |
3185 | } | |
3186 | } | |
3187 | ||
724d9f1c PS |
3188 | void cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
3189 | struct cifs_sb_info *cifs_sb) | |
b1c8d2b4 | 3190 | { |
2de970ff JL |
3191 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
3192 | ||
2ced6f69 AV |
3193 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
3194 | cifs_sb->tlink_tree = RB_ROOT; | |
3195 | ||
25c7f41e | 3196 | /* |
5eba8ab3 JL |
3197 | * Temporarily set r/wsize for matching superblock. If we end up using |
3198 | * new sb then client will later negotiate it downward if needed. | |
25c7f41e | 3199 | */ |
5eba8ab3 | 3200 | cifs_sb->rsize = pvolume_info->rsize; |
25c7f41e PS |
3201 | cifs_sb->wsize = pvolume_info->wsize; |
3202 | ||
3b795210 SF |
3203 | cifs_sb->mnt_uid = pvolume_info->linux_uid; |
3204 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
3205 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
3206 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
5206efd6 | 3207 | cFYI(1, "file mode: 0x%hx dir mode: 0x%hx", |
b6b38f70 | 3208 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); |
3b795210 | 3209 | |
6d20e840 | 3210 | cifs_sb->actimeo = pvolume_info->actimeo; |
724d9f1c | 3211 | cifs_sb->local_nls = pvolume_info->local_nls; |
6d20e840 | 3212 | |
3b795210 SF |
3213 | if (pvolume_info->noperm) |
3214 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
3215 | if (pvolume_info->setuids) | |
3216 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
3217 | if (pvolume_info->server_ino) | |
3218 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
3219 | if (pvolume_info->remap) | |
3220 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; | |
3221 | if (pvolume_info->no_xattr) | |
3222 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
3223 | if (pvolume_info->sfu_emul) | |
3224 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
3225 | if (pvolume_info->nobrl) | |
3226 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 3227 | if (pvolume_info->nostrictsync) |
4717bed6 | 3228 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
3229 | if (pvolume_info->mand_lock) |
3230 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
d4ffff1f PS |
3231 | if (pvolume_info->rwpidforward) |
3232 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; | |
3b795210 SF |
3233 | if (pvolume_info->cifs_acl) |
3234 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
3c7c87fd | 3235 | if (pvolume_info->backupuid_specified) { |
3d3ea8e6 | 3236 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; |
3c7c87fd SP |
3237 | cifs_sb->mnt_backupuid = pvolume_info->backupuid; |
3238 | } | |
3239 | if (pvolume_info->backupgid_specified) { | |
3d3ea8e6 | 3240 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; |
3c7c87fd SP |
3241 | cifs_sb->mnt_backupgid = pvolume_info->backupgid; |
3242 | } | |
3b795210 SF |
3243 | if (pvolume_info->override_uid) |
3244 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
3245 | if (pvolume_info->override_gid) | |
3246 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
3247 | if (pvolume_info->dynperm) | |
3248 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
3249 | if (pvolume_info->fsc) |
3250 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
3251 | if (pvolume_info->multiuser) |
3252 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
3253 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
3254 | if (pvolume_info->strict_io) |
3255 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 3256 | if (pvolume_info->direct_io) { |
b6b38f70 | 3257 | cFYI(1, "mounting share using direct i/o"); |
3b795210 SF |
3258 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
3259 | } | |
736a3320 SM |
3260 | if (pvolume_info->mfsymlinks) { |
3261 | if (pvolume_info->sfu_emul) { | |
3262 | cERROR(1, "mount option mfsymlinks ignored if sfu " | |
3263 | "mount option is used"); | |
3264 | } else { | |
3265 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; | |
3266 | } | |
3267 | } | |
3b795210 SF |
3268 | |
3269 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
b6b38f70 JP |
3270 | cERROR(1, "mount option dynperm ignored if cifsacl " |
3271 | "mount option supported"); | |
b1c8d2b4 JL |
3272 | } |
3273 | ||
b9bce2e9 JL |
3274 | static void |
3275 | cleanup_volume_info_contents(struct smb_vol *volume_info) | |
1bfe73c2 | 3276 | { |
b946845a | 3277 | kfree(volume_info->username); |
1bfe73c2 | 3278 | kzfree(volume_info->password); |
13589c43 SF |
3279 | if (volume_info->UNCip != volume_info->UNC + 2) |
3280 | kfree(volume_info->UNCip); | |
95c75454 | 3281 | kfree(volume_info->UNC); |
b946845a SF |
3282 | kfree(volume_info->domainname); |
3283 | kfree(volume_info->iocharset); | |
1bfe73c2 | 3284 | kfree(volume_info->prepath); |
b9bce2e9 JL |
3285 | } |
3286 | ||
3287 | void | |
3288 | cifs_cleanup_volume_info(struct smb_vol *volume_info) | |
3289 | { | |
3290 | if (!volume_info) | |
3291 | return; | |
3292 | cleanup_volume_info_contents(volume_info); | |
1bfe73c2 | 3293 | kfree(volume_info); |
1bfe73c2 IM |
3294 | } |
3295 | ||
b9bce2e9 | 3296 | |
2d6d589d | 3297 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1bfe73c2 IM |
3298 | /* build_path_to_root returns full path to root when |
3299 | * we do not have an exiting connection (tcon) */ | |
3300 | static char * | |
b2a0fa15 | 3301 | build_unc_path_to_root(const struct smb_vol *vol, |
1bfe73c2 IM |
3302 | const struct cifs_sb_info *cifs_sb) |
3303 | { | |
b2a0fa15 JL |
3304 | char *full_path, *pos; |
3305 | unsigned int pplen = vol->prepath ? strlen(vol->prepath) : 0; | |
3306 | unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); | |
1bfe73c2 | 3307 | |
b2a0fa15 | 3308 | full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); |
1bfe73c2 IM |
3309 | if (full_path == NULL) |
3310 | return ERR_PTR(-ENOMEM); | |
3311 | ||
b2a0fa15 JL |
3312 | strncpy(full_path, vol->UNC, unc_len); |
3313 | pos = full_path + unc_len; | |
3314 | ||
3315 | if (pplen) { | |
3316 | strncpy(pos, vol->prepath, pplen); | |
3317 | pos += pplen; | |
3318 | } | |
3319 | ||
3320 | *pos = '\0'; /* add trailing null */ | |
f87d39d9 | 3321 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
b2a0fa15 | 3322 | cFYI(1, "%s: full_path=%s", __func__, full_path); |
1bfe73c2 IM |
3323 | return full_path; |
3324 | } | |
dd613945 SF |
3325 | |
3326 | /* | |
3327 | * Perform a dfs referral query for a share and (optionally) prefix | |
3328 | * | |
046462ab SF |
3329 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
3330 | * to a string containing updated options for the submount. Otherwise it | |
3331 | * will be left untouched. | |
dd613945 SF |
3332 | * |
3333 | * Returns the rc from get_dfs_path to the caller, which can be used to | |
3334 | * determine whether there were referrals. | |
3335 | */ | |
3336 | static int | |
b669f33c | 3337 | expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses, |
dd613945 | 3338 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, |
046462ab | 3339 | int check_prefix) |
dd613945 SF |
3340 | { |
3341 | int rc; | |
3342 | unsigned int num_referrals = 0; | |
3343 | struct dfs_info3_param *referrals = NULL; | |
3344 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; | |
3345 | ||
3346 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
3347 | if (IS_ERR(full_path)) | |
3348 | return PTR_ERR(full_path); | |
3349 | ||
3350 | /* For DFS paths, skip the first '\' of the UNC */ | |
3351 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; | |
3352 | ||
b669f33c | 3353 | rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls, |
dd613945 SF |
3354 | &num_referrals, &referrals, |
3355 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3356 | ||
3357 | if (!rc && num_referrals > 0) { | |
3358 | char *fake_devname = NULL; | |
3359 | ||
3360 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, | |
3361 | full_path + 1, referrals, | |
3362 | &fake_devname); | |
3363 | ||
3364 | free_dfs_info_array(referrals, num_referrals); | |
046462ab | 3365 | |
dd613945 SF |
3366 | if (IS_ERR(mdata)) { |
3367 | rc = PTR_ERR(mdata); | |
3368 | mdata = NULL; | |
b9bce2e9 JL |
3369 | } else { |
3370 | cleanup_volume_info_contents(volume_info); | |
3371 | memset(volume_info, '\0', sizeof(*volume_info)); | |
3372 | rc = cifs_setup_volume_info(volume_info, mdata, | |
3373 | fake_devname); | |
dd613945 | 3374 | } |
b9bce2e9 JL |
3375 | kfree(fake_devname); |
3376 | kfree(cifs_sb->mountdata); | |
046462ab | 3377 | cifs_sb->mountdata = mdata; |
dd613945 SF |
3378 | } |
3379 | kfree(full_path); | |
3380 | return rc; | |
3381 | } | |
2d6d589d | 3382 | #endif |
1bfe73c2 | 3383 | |
04db79b0 JL |
3384 | static int |
3385 | cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, | |
3386 | const char *devname) | |
1da177e4 | 3387 | { |
724d9f1c | 3388 | int rc = 0; |
1da177e4 | 3389 | |
04db79b0 JL |
3390 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) |
3391 | return -EINVAL; | |
1da177e4 | 3392 | |
23db65f5 | 3393 | |
7586b765 | 3394 | if (volume_info->nullauth) { |
04febabc JL |
3395 | cFYI(1, "Anonymous login"); |
3396 | kfree(volume_info->username); | |
3397 | volume_info->username = NULL; | |
7586b765 | 3398 | } else if (volume_info->username) { |
1da177e4 | 3399 | /* BB fixme parse for domain name here */ |
b6b38f70 | 3400 | cFYI(1, "Username: %s", volume_info->username); |
1da177e4 | 3401 | } else { |
bf820679 | 3402 | cifserror("No username specified"); |
50c2f753 SF |
3403 | /* In userspace mount helper we can get user name from alternate |
3404 | locations such as env variables and files on disk */ | |
04db79b0 | 3405 | return -EINVAL; |
1da177e4 LT |
3406 | } |
3407 | ||
1da177e4 | 3408 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 3409 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
3410 | /* load_nls_default cannot return null */ |
3411 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 3412 | } else { |
a5fc4ce0 JL |
3413 | volume_info->local_nls = load_nls(volume_info->iocharset); |
3414 | if (volume_info->local_nls == NULL) { | |
b6b38f70 JP |
3415 | cERROR(1, "CIFS mount error: iocharset %s not found", |
3416 | volume_info->iocharset); | |
04db79b0 | 3417 | return -ELIBACC; |
1da177e4 LT |
3418 | } |
3419 | } | |
724d9f1c | 3420 | |
724d9f1c PS |
3421 | return rc; |
3422 | } | |
3423 | ||
04db79b0 JL |
3424 | struct smb_vol * |
3425 | cifs_get_volume_info(char *mount_data, const char *devname) | |
3426 | { | |
3427 | int rc; | |
3428 | struct smb_vol *volume_info; | |
3429 | ||
3430 | volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL); | |
3431 | if (!volume_info) | |
3432 | return ERR_PTR(-ENOMEM); | |
3433 | ||
3434 | rc = cifs_setup_volume_info(volume_info, mount_data, devname); | |
3435 | if (rc) { | |
3436 | cifs_cleanup_volume_info(volume_info); | |
3437 | volume_info = ERR_PTR(rc); | |
3438 | } | |
3439 | ||
3440 | return volume_info; | |
3441 | } | |
3442 | ||
724d9f1c | 3443 | int |
2c6292ae | 3444 | cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) |
724d9f1c | 3445 | { |
1daaae8f | 3446 | int rc; |
6d5786a3 | 3447 | unsigned int xid; |
af4281dc | 3448 | struct cifs_ses *ses; |
96daf2b0 | 3449 | struct cifs_tcon *tcon; |
af4281dc | 3450 | struct TCP_Server_Info *server; |
724d9f1c PS |
3451 | char *full_path; |
3452 | struct tcon_link *tlink; | |
3453 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
3454 | int referral_walks_count = 0; | |
20547490 | 3455 | #endif |
dd854466 AV |
3456 | |
3457 | rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); | |
3458 | if (rc) | |
3459 | return rc; | |
3460 | ||
20547490 | 3461 | #ifdef CONFIG_CIFS_DFS_UPCALL |
724d9f1c PS |
3462 | try_mount_again: |
3463 | /* cleanup activities if we're chasing a referral */ | |
3464 | if (referral_walks_count) { | |
3465 | if (tcon) | |
3466 | cifs_put_tcon(tcon); | |
af4281dc PS |
3467 | else if (ses) |
3468 | cifs_put_smb_ses(ses); | |
724d9f1c | 3469 | |
6d5786a3 | 3470 | free_xid(xid); |
724d9f1c PS |
3471 | } |
3472 | #endif | |
1daaae8f | 3473 | rc = 0; |
724d9f1c | 3474 | tcon = NULL; |
af4281dc PS |
3475 | ses = NULL; |
3476 | server = NULL; | |
724d9f1c PS |
3477 | full_path = NULL; |
3478 | tlink = NULL; | |
3479 | ||
6d5786a3 | 3480 | xid = get_xid(); |
1da177e4 | 3481 | |
63c038c2 | 3482 | /* get a reference to a tcp session */ |
af4281dc PS |
3483 | server = cifs_get_tcp_session(volume_info); |
3484 | if (IS_ERR(server)) { | |
3485 | rc = PTR_ERR(server); | |
dd854466 | 3486 | bdi_destroy(&cifs_sb->bdi); |
63c038c2 | 3487 | goto out; |
1da177e4 LT |
3488 | } |
3489 | ||
36988c76 | 3490 | /* get a reference to a SMB session */ |
af4281dc PS |
3491 | ses = cifs_get_smb_ses(server, volume_info); |
3492 | if (IS_ERR(ses)) { | |
3493 | rc = PTR_ERR(ses); | |
3494 | ses = NULL; | |
36988c76 | 3495 | goto mount_fail_check; |
1da177e4 | 3496 | } |
50c2f753 | 3497 | |
d00c28de | 3498 | /* search for existing tcon to this server share */ |
af4281dc | 3499 | tcon = cifs_get_tcon(ses, volume_info); |
d00c28de JL |
3500 | if (IS_ERR(tcon)) { |
3501 | rc = PTR_ERR(tcon); | |
3502 | tcon = NULL; | |
1bfe73c2 | 3503 | goto remote_path_check; |
d00c28de | 3504 | } |
1bfe73c2 | 3505 | |
d82c2df5 | 3506 | /* tell server which Unix caps we support */ |
29e20f9c | 3507 | if (cap_unix(tcon->ses)) { |
d82c2df5 SF |
3508 | /* reset of caps checks mount to see if unix extensions |
3509 | disabled for just this mount */ | |
2c6292ae | 3510 | reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info); |
6848b733 SF |
3511 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && |
3512 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & | |
3513 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) { | |
3514 | rc = -EACCES; | |
3515 | goto mount_fail_check; | |
3516 | } | |
3517 | } else | |
d82c2df5 | 3518 | tcon->unix_ext = 0; /* server does not support them */ |
c18c842b | 3519 | |
af4281dc PS |
3520 | /* do not care if a following call succeed - informational */ |
3521 | if (!tcon->ipc && server->ops->qfs_tcon) | |
3522 | server->ops->qfs_tcon(xid, tcon); | |
6848b733 | 3523 | |
24985c53 PS |
3524 | cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info); |
3525 | cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info); | |
f7910cbd | 3526 | |
66bfaadc | 3527 | /* tune readahead according to rsize */ |
8f71465c | 3528 | cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE; |
f7910cbd | 3529 | |
1bfe73c2 | 3530 | remote_path_check: |
c1508ca2 SF |
3531 | #ifdef CONFIG_CIFS_DFS_UPCALL |
3532 | /* | |
3533 | * Perform an unconditional check for whether there are DFS | |
3534 | * referrals for this path without prefix, to provide support | |
3535 | * for DFS referrals from w2k8 servers which don't seem to respond | |
3536 | * with PATH_NOT_COVERED to requests that include the prefix. | |
3537 | * Chase the referral if found, otherwise continue normally. | |
3538 | */ | |
3539 | if (referral_walks_count == 0) { | |
af4281dc PS |
3540 | int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, |
3541 | false); | |
c1508ca2 SF |
3542 | if (!refrc) { |
3543 | referral_walks_count++; | |
3544 | goto try_mount_again; | |
3545 | } | |
3546 | } | |
3547 | #endif | |
3548 | ||
f87d39d9 | 3549 | /* check if a whole path is not remote */ |
70945643 | 3550 | if (!rc && tcon) { |
68889f26 PS |
3551 | if (!server->ops->is_path_accessible) { |
3552 | rc = -ENOSYS; | |
3553 | goto mount_fail_check; | |
3554 | } | |
e4cce94c | 3555 | /* build_path_to_root works only when we have a valid tcon */ |
9224dfc2 | 3556 | full_path = build_path_to_root(volume_info, cifs_sb, tcon); |
e4cce94c IM |
3557 | if (full_path == NULL) { |
3558 | rc = -ENOMEM; | |
3559 | goto mount_fail_check; | |
3560 | } | |
68889f26 PS |
3561 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, |
3562 | full_path); | |
03ceace5 | 3563 | if (rc != 0 && rc != -EREMOTE) { |
e4cce94c IM |
3564 | kfree(full_path); |
3565 | goto mount_fail_check; | |
3566 | } | |
3567 | kfree(full_path); | |
3568 | } | |
3569 | ||
1bfe73c2 IM |
3570 | /* get referral if needed */ |
3571 | if (rc == -EREMOTE) { | |
d036f50f | 3572 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
3573 | if (referral_walks_count > MAX_NESTED_LINKS) { |
3574 | /* | |
3575 | * BB: when we implement proper loop detection, | |
3576 | * we will remove this check. But now we need it | |
3577 | * to prevent an indefinite loop if 'DFS tree' is | |
3578 | * misconfigured (i.e. has loops). | |
3579 | */ | |
3580 | rc = -ELOOP; | |
3581 | goto mount_fail_check; | |
3582 | } | |
1bfe73c2 | 3583 | |
af4281dc | 3584 | rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true); |
7b91e266 | 3585 | |
dd613945 | 3586 | if (!rc) { |
5c2503a8 | 3587 | referral_walks_count++; |
1bfe73c2 IM |
3588 | goto try_mount_again; |
3589 | } | |
dd613945 | 3590 | goto mount_fail_check; |
d036f50f SF |
3591 | #else /* No DFS support, return error on mount */ |
3592 | rc = -EOPNOTSUPP; | |
3593 | #endif | |
1bfe73c2 IM |
3594 | } |
3595 | ||
9d002df4 JL |
3596 | if (rc) |
3597 | goto mount_fail_check; | |
3598 | ||
3599 | /* now, hang the tcon off of the superblock */ | |
3600 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); | |
3601 | if (tlink == NULL) { | |
3602 | rc = -ENOMEM; | |
3603 | goto mount_fail_check; | |
3604 | } | |
3605 | ||
af4281dc | 3606 | tlink->tl_uid = ses->linux_uid; |
9d002df4 JL |
3607 | tlink->tl_tcon = tcon; |
3608 | tlink->tl_time = jiffies; | |
3609 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
3610 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3611 | ||
b647c35f | 3612 | cifs_sb->master_tlink = tlink; |
9d002df4 | 3613 | spin_lock(&cifs_sb->tlink_tree_lock); |
b647c35f | 3614 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
9d002df4 | 3615 | spin_unlock(&cifs_sb->tlink_tree_lock); |
413e661c | 3616 | |
da472fc8 | 3617 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
3618 | TLINK_IDLE_EXPIRE); |
3619 | ||
1bfe73c2 IM |
3620 | mount_fail_check: |
3621 | /* on error free sesinfo and tcon struct if needed */ | |
3622 | if (rc) { | |
1bfe73c2 | 3623 | /* If find_unc succeeded then rc == 0 so we can not end */ |
25985edc | 3624 | /* up accidentally freeing someone elses tcon struct */ |
1bfe73c2 IM |
3625 | if (tcon) |
3626 | cifs_put_tcon(tcon); | |
af4281dc PS |
3627 | else if (ses) |
3628 | cifs_put_smb_ses(ses); | |
1bfe73c2 | 3629 | else |
af4281dc | 3630 | cifs_put_tcp_session(server); |
dd854466 | 3631 | bdi_destroy(&cifs_sb->bdi); |
1bfe73c2 IM |
3632 | } |
3633 | ||
70fe7dc0 | 3634 | out: |
6d5786a3 | 3635 | free_xid(xid); |
1da177e4 LT |
3636 | return rc; |
3637 | } | |
3638 | ||
8d1bca32 JL |
3639 | /* |
3640 | * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon | |
3641 | * pointer may be NULL. | |
3642 | */ | |
1da177e4 | 3643 | int |
2e6e02ab | 3644 | CIFSTCon(const unsigned int xid, struct cifs_ses *ses, |
96daf2b0 | 3645 | const char *tree, struct cifs_tcon *tcon, |
1da177e4 LT |
3646 | const struct nls_table *nls_codepage) |
3647 | { | |
3648 | struct smb_hdr *smb_buffer; | |
3649 | struct smb_hdr *smb_buffer_response; | |
3650 | TCONX_REQ *pSMB; | |
3651 | TCONX_RSP *pSMBr; | |
3652 | unsigned char *bcc_ptr; | |
3653 | int rc = 0; | |
690c522f JL |
3654 | int length; |
3655 | __u16 bytes_left, count; | |
1da177e4 LT |
3656 | |
3657 | if (ses == NULL) | |
3658 | return -EIO; | |
3659 | ||
3660 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 3661 | if (smb_buffer == NULL) |
1da177e4 | 3662 | return -ENOMEM; |
ca43e3be | 3663 | |
1da177e4 LT |
3664 | smb_buffer_response = smb_buffer; |
3665 | ||
3666 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
3667 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 | 3668 | |
88257360 | 3669 | smb_buffer->Mid = get_next_mid(ses->server); |
1da177e4 LT |
3670 | smb_buffer->Uid = ses->Suid; |
3671 | pSMB = (TCONX_REQ *) smb_buffer; | |
3672 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
3673 | ||
3674 | pSMB->AndXCommand = 0xFF; | |
3675 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 3676 | bcc_ptr = &pSMB->Password[0]; |
8d1bca32 | 3677 | if (!tcon || (ses->server->sec_mode & SECMODE_USER)) { |
eeac8047 | 3678 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 3679 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 3680 | bcc_ptr++; /* skip password */ |
7c7b25bc | 3681 | /* already aligned so no need to do it below */ |
eeac8047 | 3682 | } else { |
540b2e37 | 3683 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
3684 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
3685 | specified as required (when that support is added to | |
3686 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 3687 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
3688 | by Samba (not sure whether other servers allow |
3689 | NTLMv2 password here) */ | |
7c7b25bc | 3690 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 3691 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
00e485b0 | 3692 | (ses->server->secType == LANMAN)) |
d3ba50b1 | 3693 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
96daf2b0 | 3694 | ses->server->sec_mode & |
4e53a3fb JL |
3695 | SECMODE_PW_ENCRYPT ? true : false, |
3696 | bcc_ptr); | |
7c7b25bc SF |
3697 | else |
3698 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 | 3699 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
9ef5992e | 3700 | bcc_ptr, nls_codepage); |
eeac8047 | 3701 | |
540b2e37 | 3702 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 3703 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
3704 | /* must align unicode strings */ |
3705 | *bcc_ptr = 0; /* null byte password */ | |
3706 | bcc_ptr++; | |
3707 | } | |
eeac8047 | 3708 | } |
1da177e4 | 3709 | |
96daf2b0 | 3710 | if (ses->server->sec_mode & |
a878fb22 | 3711 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
1da177e4 LT |
3712 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
3713 | ||
3714 | if (ses->capabilities & CAP_STATUS32) { | |
3715 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
3716 | } | |
3717 | if (ses->capabilities & CAP_DFS) { | |
3718 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
3719 | } | |
3720 | if (ses->capabilities & CAP_UNICODE) { | |
3721 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
3722 | length = | |
acbbb76a | 3723 | cifs_strtoUTF16((__le16 *) bcc_ptr, tree, |
50c2f753 | 3724 | 6 /* max utf8 char length in bytes */ * |
a878fb22 SF |
3725 | (/* server len*/ + 256 /* share len */), nls_codepage); |
3726 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
3727 | bcc_ptr += 2; /* skip trailing null */ |
3728 | } else { /* ASCII */ | |
1da177e4 LT |
3729 | strcpy(bcc_ptr, tree); |
3730 | bcc_ptr += strlen(tree) + 1; | |
3731 | } | |
3732 | strcpy(bcc_ptr, "?????"); | |
3733 | bcc_ptr += strlen("?????"); | |
3734 | bcc_ptr += 1; | |
3735 | count = bcc_ptr - &pSMB->Password[0]; | |
be8e3b00 SF |
3736 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
3737 | pSMB->hdr.smb_buf_length) + count); | |
1da177e4 LT |
3738 | pSMB->ByteCount = cpu_to_le16(count); |
3739 | ||
133672ef | 3740 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 3741 | 0); |
1da177e4 | 3742 | |
1da177e4 LT |
3743 | /* above now done in SendReceive */ |
3744 | if ((rc == 0) && (tcon != NULL)) { | |
0e0d2cf3 SF |
3745 | bool is_unicode; |
3746 | ||
1da177e4 | 3747 | tcon->tidStatus = CifsGood; |
3b795210 | 3748 | tcon->need_reconnect = false; |
1da177e4 LT |
3749 | tcon->tid = smb_buffer_response->Tid; |
3750 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 3751 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 3752 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
3753 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
3754 | is_unicode = true; | |
3755 | else | |
3756 | is_unicode = false; | |
3757 | ||
cc20c031 | 3758 | |
50c2f753 | 3759 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
3760 | if (length == 3) { |
3761 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
3762 | (bcc_ptr[2] == 'C')) { | |
b6b38f70 | 3763 | cFYI(1, "IPC connection"); |
7f8ed420 SF |
3764 | tcon->ipc = 1; |
3765 | } | |
3766 | } else if (length == 2) { | |
3767 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
3768 | /* the most common case */ | |
b6b38f70 | 3769 | cFYI(1, "disk share connection"); |
7f8ed420 SF |
3770 | } |
3771 | } | |
50c2f753 | 3772 | bcc_ptr += length + 1; |
cc20c031 | 3773 | bytes_left -= (length + 1); |
1da177e4 | 3774 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); |
cc20c031 JL |
3775 | |
3776 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 3777 | kfree(tcon->nativeFileSystem); |
acbbb76a | 3778 | tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr, |
0e0d2cf3 | 3779 | bytes_left, is_unicode, |
cc20c031 JL |
3780 | nls_codepage); |
3781 | ||
b6b38f70 | 3782 | cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem); |
cc20c031 | 3783 | |
fb8c4b14 | 3784 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
3785 | (smb_buffer_response->WordCount == 7)) |
3786 | /* field is in same location */ | |
3979877e SF |
3787 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
3788 | else | |
3789 | tcon->Flags = 0; | |
b6b38f70 | 3790 | cFYI(1, "Tcon flags: 0x%x ", tcon->Flags); |
1da177e4 | 3791 | } else if ((rc == 0) && tcon == NULL) { |
50c2f753 | 3792 | /* all we need to save for IPC$ connection */ |
1da177e4 LT |
3793 | ses->ipc_tid = smb_buffer_response->Tid; |
3794 | } | |
3795 | ||
a8a11d39 | 3796 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
3797 | return rc; |
3798 | } | |
3799 | ||
2a9b9951 AV |
3800 | void |
3801 | cifs_umount(struct cifs_sb_info *cifs_sb) | |
1da177e4 | 3802 | { |
b647c35f JL |
3803 | struct rb_root *root = &cifs_sb->tlink_tree; |
3804 | struct rb_node *node; | |
3805 | struct tcon_link *tlink; | |
9d002df4 | 3806 | |
2de970ff JL |
3807 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
3808 | ||
b647c35f JL |
3809 | spin_lock(&cifs_sb->tlink_tree_lock); |
3810 | while ((node = rb_first(root))) { | |
3811 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3812 | cifs_get_tlink(tlink); | |
3813 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3814 | rb_erase(node, root); | |
1da177e4 | 3815 | |
b647c35f JL |
3816 | spin_unlock(&cifs_sb->tlink_tree_lock); |
3817 | cifs_put_tlink(tlink); | |
3818 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3819 | } | |
3820 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 3821 | |
dd854466 | 3822 | bdi_destroy(&cifs_sb->bdi); |
d757d71b AV |
3823 | kfree(cifs_sb->mountdata); |
3824 | unload_nls(cifs_sb->local_nls); | |
3825 | kfree(cifs_sb); | |
50c2f753 | 3826 | } |
1da177e4 | 3827 | |
286170aa PS |
3828 | int |
3829 | cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses) | |
1da177e4 LT |
3830 | { |
3831 | int rc = 0; | |
198b5682 | 3832 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 3833 | |
286170aa PS |
3834 | if (!server->ops->need_neg || !server->ops->negotiate) |
3835 | return -ENOSYS; | |
3836 | ||
198b5682 | 3837 | /* only send once per connect */ |
286170aa | 3838 | if (!server->ops->need_neg(server)) |
198b5682 JL |
3839 | return 0; |
3840 | ||
45275789 | 3841 | set_credits(server, 1); |
286170aa PS |
3842 | |
3843 | rc = server->ops->negotiate(xid, ses); | |
198b5682 JL |
3844 | if (rc == 0) { |
3845 | spin_lock(&GlobalMid_Lock); | |
7fdbaa1b | 3846 | if (server->tcpStatus == CifsNeedNegotiate) |
198b5682 JL |
3847 | server->tcpStatus = CifsGood; |
3848 | else | |
3849 | rc = -EHOSTDOWN; | |
3850 | spin_unlock(&GlobalMid_Lock); | |
198b5682 JL |
3851 | } |
3852 | ||
3853 | return rc; | |
3854 | } | |
3855 | ||
58c45c58 PS |
3856 | int |
3857 | cifs_setup_session(const unsigned int xid, struct cifs_ses *ses, | |
3858 | struct nls_table *nls_info) | |
198b5682 | 3859 | { |
58c45c58 | 3860 | int rc = -ENOSYS; |
198b5682 | 3861 | struct TCP_Server_Info *server = ses->server; |
26b994fa | 3862 | |
198b5682 JL |
3863 | ses->flags = 0; |
3864 | ses->capabilities = server->capabilities; | |
26b994fa | 3865 | if (linuxExtEnabled == 0) |
29e20f9c | 3866 | ses->capabilities &= (~server->vals->cap_unix); |
20418acd | 3867 | |
b6b38f70 | 3868 | cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d", |
96daf2b0 | 3869 | server->sec_mode, server->capabilities, server->timeAdj); |
cb7691b6 | 3870 | |
58c45c58 PS |
3871 | if (server->ops->sess_setup) |
3872 | rc = server->ops->sess_setup(xid, ses, nls_info); | |
3873 | ||
26b994fa | 3874 | if (rc) { |
b6b38f70 | 3875 | cERROR(1, "Send error in SessSetup = %d", rc); |
26b994fa | 3876 | } else { |
5d0d2882 SP |
3877 | mutex_lock(&ses->server->srv_mutex); |
3878 | if (!server->session_estab) { | |
21e73393 | 3879 | server->session_key.response = ses->auth_key.response; |
5d0d2882 | 3880 | server->session_key.len = ses->auth_key.len; |
21e73393 SP |
3881 | server->sequence_number = 0x2; |
3882 | server->session_estab = true; | |
3883 | ses->auth_key.response = NULL; | |
5d0d2882 SP |
3884 | } |
3885 | mutex_unlock(&server->srv_mutex); | |
3886 | ||
b6b38f70 | 3887 | cFYI(1, "CIFS Session Established successfully"); |
20418acd | 3888 | spin_lock(&GlobalMid_Lock); |
198b5682 JL |
3889 | ses->status = CifsGood; |
3890 | ses->need_reconnect = false; | |
20418acd | 3891 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 3892 | } |
26b994fa | 3893 | |
21e73393 SP |
3894 | kfree(ses->auth_key.response); |
3895 | ses->auth_key.response = NULL; | |
3896 | ses->auth_key.len = 0; | |
d3686d54 SP |
3897 | kfree(ses->ntlmssp); |
3898 | ses->ntlmssp = NULL; | |
21e73393 | 3899 | |
1da177e4 LT |
3900 | return rc; |
3901 | } | |
3902 | ||
8a8798a5 JL |
3903 | static int |
3904 | cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses) | |
3905 | { | |
3906 | switch (ses->server->secType) { | |
3907 | case Kerberos: | |
3908 | vol->secFlg = CIFSSEC_MUST_KRB5; | |
3909 | return 0; | |
3910 | case NTLMv2: | |
3911 | vol->secFlg = CIFSSEC_MUST_NTLMV2; | |
3912 | break; | |
3913 | case NTLM: | |
3914 | vol->secFlg = CIFSSEC_MUST_NTLM; | |
3915 | break; | |
3916 | case RawNTLMSSP: | |
3917 | vol->secFlg = CIFSSEC_MUST_NTLMSSP; | |
3918 | break; | |
3919 | case LANMAN: | |
3920 | vol->secFlg = CIFSSEC_MUST_LANMAN; | |
3921 | break; | |
3922 | } | |
3923 | ||
3924 | return cifs_set_cifscreds(vol, ses); | |
3925 | } | |
3926 | ||
96daf2b0 | 3927 | static struct cifs_tcon * |
9d002df4 JL |
3928 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid) |
3929 | { | |
8a8798a5 | 3930 | int rc; |
96daf2b0 SF |
3931 | struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); |
3932 | struct cifs_ses *ses; | |
3933 | struct cifs_tcon *tcon = NULL; | |
9d002df4 | 3934 | struct smb_vol *vol_info; |
9d002df4 JL |
3935 | |
3936 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
803ab977 DC |
3937 | if (vol_info == NULL) |
3938 | return ERR_PTR(-ENOMEM); | |
9d002df4 | 3939 | |
9d002df4 JL |
3940 | vol_info->local_nls = cifs_sb->local_nls; |
3941 | vol_info->linux_uid = fsuid; | |
3942 | vol_info->cred_uid = fsuid; | |
3943 | vol_info->UNC = master_tcon->treeName; | |
3944 | vol_info->retry = master_tcon->retry; | |
3945 | vol_info->nocase = master_tcon->nocase; | |
3946 | vol_info->local_lease = master_tcon->local_lease; | |
3947 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
3948 | ||
8a8798a5 JL |
3949 | rc = cifs_set_vol_auth(vol_info, master_tcon->ses); |
3950 | if (rc) { | |
3951 | tcon = ERR_PTR(rc); | |
3952 | goto out; | |
3953 | } | |
9d002df4 JL |
3954 | |
3955 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 3956 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 3957 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 3958 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
3959 | |
3960 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
3961 | if (IS_ERR(ses)) { | |
96daf2b0 | 3962 | tcon = (struct cifs_tcon *)ses; |
9d002df4 JL |
3963 | cifs_put_tcp_session(master_tcon->ses->server); |
3964 | goto out; | |
3965 | } | |
3966 | ||
3967 | tcon = cifs_get_tcon(ses, vol_info); | |
3968 | if (IS_ERR(tcon)) { | |
3969 | cifs_put_smb_ses(ses); | |
3970 | goto out; | |
3971 | } | |
3972 | ||
29e20f9c | 3973 | if (cap_unix(ses)) |
9d002df4 JL |
3974 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); |
3975 | out: | |
8a8798a5 JL |
3976 | kfree(vol_info->username); |
3977 | kfree(vol_info->password); | |
9d002df4 JL |
3978 | kfree(vol_info); |
3979 | ||
3980 | return tcon; | |
3981 | } | |
3982 | ||
96daf2b0 | 3983 | struct cifs_tcon * |
9d002df4 JL |
3984 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) |
3985 | { | |
3986 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
3987 | } | |
3988 | ||
3989 | static int | |
3990 | cifs_sb_tcon_pending_wait(void *unused) | |
3991 | { | |
3992 | schedule(); | |
3993 | return signal_pending(current) ? -ERESTARTSYS : 0; | |
3994 | } | |
3995 | ||
b647c35f JL |
3996 | /* find and return a tlink with given uid */ |
3997 | static struct tcon_link * | |
3998 | tlink_rb_search(struct rb_root *root, uid_t uid) | |
3999 | { | |
4000 | struct rb_node *node = root->rb_node; | |
4001 | struct tcon_link *tlink; | |
4002 | ||
4003 | while (node) { | |
4004 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
4005 | ||
4006 | if (tlink->tl_uid > uid) | |
4007 | node = node->rb_left; | |
4008 | else if (tlink->tl_uid < uid) | |
4009 | node = node->rb_right; | |
4010 | else | |
4011 | return tlink; | |
4012 | } | |
4013 | return NULL; | |
4014 | } | |
4015 | ||
4016 | /* insert a tcon_link into the tree */ | |
4017 | static void | |
4018 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
4019 | { | |
4020 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
4021 | struct tcon_link *tlink; | |
4022 | ||
4023 | while (*new) { | |
4024 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
4025 | parent = *new; | |
4026 | ||
4027 | if (tlink->tl_uid > new_tlink->tl_uid) | |
4028 | new = &((*new)->rb_left); | |
4029 | else | |
4030 | new = &((*new)->rb_right); | |
4031 | } | |
4032 | ||
4033 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
4034 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
4035 | } | |
4036 | ||
9d002df4 JL |
4037 | /* |
4038 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
4039 | * current task. | |
4040 | * | |
4041 | * If the superblock doesn't refer to a multiuser mount, then just return | |
4042 | * the master tcon for the mount. | |
4043 | * | |
6ef933a3 | 4044 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
4045 | * exists, then check to see if it's pending construction. If it is then wait |
4046 | * for construction to complete. Once it's no longer pending, check to see if | |
4047 | * it failed and either return an error or retry construction, depending on | |
4048 | * the timeout. | |
4049 | * | |
4050 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
4051 | * try to construct a new one. | |
4052 | */ | |
4053 | struct tcon_link * | |
4054 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
4055 | { | |
4056 | int ret; | |
b647c35f | 4057 | uid_t fsuid = current_fsuid(); |
9d002df4 JL |
4058 | struct tcon_link *tlink, *newtlink; |
4059 | ||
4060 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
4061 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
4062 | ||
4063 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 4064 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4065 | if (tlink) |
4066 | cifs_get_tlink(tlink); | |
4067 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4068 | ||
4069 | if (tlink == NULL) { | |
4070 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
4071 | if (newtlink == NULL) | |
4072 | return ERR_PTR(-ENOMEM); | |
b647c35f | 4073 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
4074 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
4075 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
4076 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
4077 | cifs_get_tlink(newtlink); | |
4078 | ||
9d002df4 JL |
4079 | spin_lock(&cifs_sb->tlink_tree_lock); |
4080 | /* was one inserted after previous search? */ | |
b647c35f | 4081 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4082 | if (tlink) { |
4083 | cifs_get_tlink(tlink); | |
4084 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4085 | kfree(newtlink); |
4086 | goto wait_for_construction; | |
4087 | } | |
9d002df4 | 4088 | tlink = newtlink; |
b647c35f JL |
4089 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
4090 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4091 | } else { |
4092 | wait_for_construction: | |
4093 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
4094 | cifs_sb_tcon_pending_wait, | |
4095 | TASK_INTERRUPTIBLE); | |
4096 | if (ret) { | |
4097 | cifs_put_tlink(tlink); | |
4098 | return ERR_PTR(ret); | |
4099 | } | |
4100 | ||
4101 | /* if it's good, return it */ | |
4102 | if (!IS_ERR(tlink->tl_tcon)) | |
4103 | return tlink; | |
4104 | ||
4105 | /* return error if we tried this already recently */ | |
4106 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
4107 | cifs_put_tlink(tlink); | |
4108 | return ERR_PTR(-EACCES); | |
4109 | } | |
4110 | ||
4111 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
4112 | goto wait_for_construction; | |
4113 | } | |
4114 | ||
4115 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
4116 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
4117 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
4118 | ||
4119 | if (IS_ERR(tlink->tl_tcon)) { | |
4120 | cifs_put_tlink(tlink); | |
4121 | return ERR_PTR(-EACCES); | |
4122 | } | |
4123 | ||
4124 | return tlink; | |
4125 | } | |
2de970ff JL |
4126 | |
4127 | /* | |
4128 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
4129 | * out tcons. | |
4130 | */ | |
4131 | static void | |
4132 | cifs_prune_tlinks(struct work_struct *work) | |
4133 | { | |
4134 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
4135 | prune_tlinks.work); | |
b647c35f JL |
4136 | struct rb_root *root = &cifs_sb->tlink_tree; |
4137 | struct rb_node *node = rb_first(root); | |
4138 | struct rb_node *tmp; | |
4139 | struct tcon_link *tlink; | |
2de970ff | 4140 | |
b647c35f JL |
4141 | /* |
4142 | * Because we drop the spinlock in the loop in order to put the tlink | |
4143 | * it's not guarded against removal of links from the tree. The only | |
4144 | * places that remove entries from the tree are this function and | |
4145 | * umounts. Because this function is non-reentrant and is canceled | |
4146 | * before umount can proceed, this is safe. | |
4147 | */ | |
4148 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4149 | node = rb_first(root); | |
4150 | while (node != NULL) { | |
4151 | tmp = node; | |
4152 | node = rb_next(tmp); | |
4153 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
4154 | ||
4155 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
4156 | atomic_read(&tlink->tl_count) != 0 || | |
4157 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
4158 | continue; | |
2de970ff | 4159 | |
b647c35f JL |
4160 | cifs_get_tlink(tlink); |
4161 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4162 | rb_erase(tmp, root); | |
4163 | ||
4164 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4165 | cifs_put_tlink(tlink); | |
4166 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4167 | } | |
4168 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff | 4169 | |
da472fc8 | 4170 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
4171 | TLINK_IDLE_EXPIRE); |
4172 | } |