Commit | Line | Data |
---|---|---|
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, | |
72bd481f | 70 | Opt_forcegid, Opt_noforcegid, |
8830d7e0 SP |
71 | Opt_noblocksend, Opt_noautotune, |
72 | Opt_hard, Opt_soft, Opt_perm, Opt_noperm, | |
73 | Opt_mapchars, Opt_nomapchars, Opt_sfu, | |
74 | Opt_nosfu, Opt_nodfs, Opt_posixpaths, | |
75 | Opt_noposixpaths, Opt_nounix, | |
76 | Opt_nocase, | |
77 | Opt_brl, Opt_nobrl, | |
78 | Opt_forcemandatorylock, Opt_setuids, | |
79 | Opt_nosetuids, Opt_dynperm, Opt_nodynperm, | |
80 | Opt_nohard, Opt_nosoft, | |
81 | Opt_nointr, Opt_intr, | |
82 | Opt_nostrictsync, Opt_strictsync, | |
83 | Opt_serverino, Opt_noserverino, | |
84 | Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl, | |
85 | Opt_acl, Opt_noacl, Opt_locallease, | |
1b359204 | 86 | Opt_sign, Opt_seal, Opt_noac, |
8830d7e0 | 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" }, | |
72bd481f JL |
121 | { Opt_forcegid, "forcegid" }, |
122 | { Opt_noforcegid, "noforcegid" }, | |
8830d7e0 SP |
123 | { Opt_noblocksend, "noblocksend" }, |
124 | { Opt_noautotune, "noautotune" }, | |
125 | { Opt_hard, "hard" }, | |
126 | { Opt_soft, "soft" }, | |
127 | { Opt_perm, "perm" }, | |
128 | { Opt_noperm, "noperm" }, | |
129 | { Opt_mapchars, "mapchars" }, | |
130 | { Opt_nomapchars, "nomapchars" }, | |
131 | { Opt_sfu, "sfu" }, | |
132 | { Opt_nosfu, "nosfu" }, | |
133 | { Opt_nodfs, "nodfs" }, | |
134 | { Opt_posixpaths, "posixpaths" }, | |
135 | { Opt_noposixpaths, "noposixpaths" }, | |
136 | { Opt_nounix, "nounix" }, | |
137 | { Opt_nounix, "nolinux" }, | |
138 | { Opt_nocase, "nocase" }, | |
139 | { Opt_nocase, "ignorecase" }, | |
140 | { Opt_brl, "brl" }, | |
141 | { Opt_nobrl, "nobrl" }, | |
142 | { Opt_nobrl, "nolock" }, | |
143 | { Opt_forcemandatorylock, "forcemandatorylock" }, | |
5cfdddcf | 144 | { Opt_forcemandatorylock, "forcemand" }, |
8830d7e0 SP |
145 | { Opt_setuids, "setuids" }, |
146 | { Opt_nosetuids, "nosetuids" }, | |
147 | { Opt_dynperm, "dynperm" }, | |
148 | { Opt_nodynperm, "nodynperm" }, | |
149 | { Opt_nohard, "nohard" }, | |
150 | { Opt_nosoft, "nosoft" }, | |
151 | { Opt_nointr, "nointr" }, | |
152 | { Opt_intr, "intr" }, | |
153 | { Opt_nostrictsync, "nostrictsync" }, | |
154 | { Opt_strictsync, "strictsync" }, | |
155 | { Opt_serverino, "serverino" }, | |
156 | { Opt_noserverino, "noserverino" }, | |
157 | { Opt_rwpidforward, "rwpidforward" }, | |
158 | { Opt_cifsacl, "cifsacl" }, | |
159 | { Opt_nocifsacl, "nocifsacl" }, | |
160 | { Opt_acl, "acl" }, | |
161 | { Opt_noacl, "noacl" }, | |
162 | { Opt_locallease, "locallease" }, | |
163 | { Opt_sign, "sign" }, | |
164 | { Opt_seal, "seal" }, | |
8830d7e0 SP |
165 | { Opt_noac, "noac" }, |
166 | { Opt_fsc, "fsc" }, | |
167 | { Opt_mfsymlinks, "mfsymlinks" }, | |
168 | { Opt_multiuser, "multiuser" }, | |
d8162558 | 169 | { Opt_sloppy, "sloppy" }, |
8830d7e0 SP |
170 | |
171 | { Opt_backupuid, "backupuid=%s" }, | |
172 | { Opt_backupgid, "backupgid=%s" }, | |
173 | { Opt_uid, "uid=%s" }, | |
174 | { Opt_cruid, "cruid=%s" }, | |
175 | { Opt_gid, "gid=%s" }, | |
176 | { Opt_file_mode, "file_mode=%s" }, | |
177 | { Opt_dirmode, "dirmode=%s" }, | |
178 | { Opt_dirmode, "dir_mode=%s" }, | |
179 | { Opt_port, "port=%s" }, | |
180 | { Opt_rsize, "rsize=%s" }, | |
181 | { Opt_wsize, "wsize=%s" }, | |
182 | { Opt_actimeo, "actimeo=%s" }, | |
183 | ||
4fe9e963 SP |
184 | { Opt_blank_user, "user=" }, |
185 | { Opt_blank_user, "username=" }, | |
8830d7e0 SP |
186 | { Opt_user, "user=%s" }, |
187 | { Opt_user, "username=%s" }, | |
188 | { Opt_blank_pass, "pass=" }, | |
3c15b4cf | 189 | { Opt_blank_pass, "password=" }, |
8830d7e0 SP |
190 | { Opt_pass, "pass=%s" }, |
191 | { Opt_pass, "password=%s" }, | |
4fe9e963 SP |
192 | { Opt_blank_ip, "ip=" }, |
193 | { Opt_blank_ip, "addr=" }, | |
8830d7e0 SP |
194 | { Opt_ip, "ip=%s" }, |
195 | { Opt_ip, "addr=%s" }, | |
196 | { Opt_unc, "unc=%s" }, | |
197 | { Opt_unc, "target=%s" }, | |
198 | { Opt_unc, "path=%s" }, | |
199 | { Opt_domain, "dom=%s" }, | |
200 | { Opt_domain, "domain=%s" }, | |
201 | { Opt_domain, "workgroup=%s" }, | |
202 | { Opt_srcaddr, "srcaddr=%s" }, | |
203 | { Opt_prefixpath, "prefixpath=%s" }, | |
204 | { Opt_iocharset, "iocharset=%s" }, | |
205 | { Opt_sockopt, "sockopt=%s" }, | |
206 | { Opt_netbiosname, "netbiosname=%s" }, | |
207 | { Opt_servern, "servern=%s" }, | |
208 | { Opt_ver, "ver=%s" }, | |
23db65f5 | 209 | { Opt_vers, "vers=%s" }, |
8830d7e0 | 210 | { Opt_sec, "sec=%s" }, |
15b6a473 | 211 | { Opt_cache, "cache=%s" }, |
8830d7e0 SP |
212 | |
213 | { Opt_ignore, "cred" }, | |
214 | { Opt_ignore, "credentials" }, | |
a557b976 JL |
215 | { Opt_ignore, "cred=%s" }, |
216 | { Opt_ignore, "credentials=%s" }, | |
8830d7e0 SP |
217 | { Opt_ignore, "guest" }, |
218 | { Opt_ignore, "rw" }, | |
219 | { Opt_ignore, "ro" }, | |
220 | { Opt_ignore, "suid" }, | |
221 | { Opt_ignore, "nosuid" }, | |
222 | { Opt_ignore, "exec" }, | |
223 | { Opt_ignore, "noexec" }, | |
224 | { Opt_ignore, "nodev" }, | |
225 | { Opt_ignore, "noauto" }, | |
226 | { Opt_ignore, "dev" }, | |
227 | { Opt_ignore, "mand" }, | |
228 | { Opt_ignore, "nomand" }, | |
229 | { Opt_ignore, "_netdev" }, | |
230 | ||
231 | { Opt_err, NULL } | |
232 | }; | |
233 | ||
234 | enum { | |
235 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
236 | Opt_sec_ntlmsspi, Opt_sec_ntlmssp, | |
7659624f JL |
237 | Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2, |
238 | Opt_sec_ntlmv2i, Opt_sec_lanman, | |
8830d7e0 SP |
239 | Opt_sec_none, |
240 | ||
241 | Opt_sec_err | |
242 | }; | |
243 | ||
244 | static const match_table_t cifs_secflavor_tokens = { | |
245 | { Opt_sec_krb5, "krb5" }, | |
246 | { Opt_sec_krb5i, "krb5i" }, | |
247 | { Opt_sec_krb5p, "krb5p" }, | |
248 | { Opt_sec_ntlmsspi, "ntlmsspi" }, | |
249 | { Opt_sec_ntlmssp, "ntlmssp" }, | |
250 | { Opt_ntlm, "ntlm" }, | |
251 | { Opt_sec_ntlmi, "ntlmi" }, | |
7659624f JL |
252 | { Opt_sec_ntlmv2, "nontlm" }, |
253 | { Opt_sec_ntlmv2, "ntlmv2" }, | |
8830d7e0 | 254 | { Opt_sec_ntlmv2i, "ntlmv2i" }, |
8830d7e0 SP |
255 | { Opt_sec_lanman, "lanman" }, |
256 | { Opt_sec_none, "none" }, | |
257 | ||
258 | { Opt_sec_err, NULL } | |
259 | }; | |
260 | ||
15b6a473 JL |
261 | /* cache flavors */ |
262 | enum { | |
263 | Opt_cache_loose, | |
264 | Opt_cache_strict, | |
265 | Opt_cache_none, | |
266 | Opt_cache_err | |
267 | }; | |
268 | ||
269 | static const match_table_t cifs_cacheflavor_tokens = { | |
270 | { Opt_cache_loose, "loose" }, | |
271 | { Opt_cache_strict, "strict" }, | |
272 | { Opt_cache_none, "none" }, | |
273 | { Opt_cache_err, NULL } | |
274 | }; | |
275 | ||
23db65f5 JL |
276 | static const match_table_t cifs_smb_version_tokens = { |
277 | { Smb_1, SMB1_VERSION_STRING }, | |
dd446b16 | 278 | { Smb_20, SMB20_VERSION_STRING}, |
1080ef75 | 279 | { Smb_21, SMB21_VERSION_STRING }, |
e4aa25e7 | 280 | { Smb_30, SMB30_VERSION_STRING }, |
23db65f5 JL |
281 | }; |
282 | ||
a9f1b85e PS |
283 | static int ip_connect(struct TCP_Server_Info *server); |
284 | static int generic_ip_connect(struct TCP_Server_Info *server); | |
b647c35f | 285 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
2de970ff | 286 | static void cifs_prune_tlinks(struct work_struct *work); |
b9bce2e9 JL |
287 | static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
288 | const char *devname); | |
1da177e4 | 289 | |
d5c5605c JL |
290 | /* |
291 | * cifs tcp session reconnection | |
292 | * | |
293 | * mark tcp session as reconnecting so temporarily locked | |
294 | * mark all smb sessions as reconnecting for tcp session | |
295 | * reconnect tcp session | |
296 | * wake up waiters on reconnection? - (not needed currently) | |
297 | */ | |
28ea5290 | 298 | int |
1da177e4 LT |
299 | cifs_reconnect(struct TCP_Server_Info *server) |
300 | { | |
301 | int rc = 0; | |
f1987b44 | 302 | struct list_head *tmp, *tmp2; |
96daf2b0 SF |
303 | struct cifs_ses *ses; |
304 | struct cifs_tcon *tcon; | |
fb8c4b14 | 305 | struct mid_q_entry *mid_entry; |
3c1105df | 306 | struct list_head retry_list; |
50c2f753 | 307 | |
1da177e4 | 308 | spin_lock(&GlobalMid_Lock); |
469ee614 | 309 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 310 | /* the demux thread will exit normally |
1da177e4 LT |
311 | next time through the loop */ |
312 | spin_unlock(&GlobalMid_Lock); | |
313 | return rc; | |
314 | } else | |
315 | server->tcpStatus = CifsNeedReconnect; | |
316 | spin_unlock(&GlobalMid_Lock); | |
317 | server->maxBuf = 0; | |
aa24d1e9 PS |
318 | #ifdef CONFIG_CIFS_SMB2 |
319 | server->max_read = 0; | |
320 | #endif | |
1da177e4 | 321 | |
b6b38f70 | 322 | cFYI(1, "Reconnecting tcp session"); |
1da177e4 LT |
323 | |
324 | /* before reconnecting the tcp session, mark the smb session (uid) | |
325 | and the tid bad so they are not used until reconnected */ | |
2b84a36c | 326 | cFYI(1, "%s: marking sessions and tcons for reconnect", __func__); |
3f9bcca7 | 327 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 328 | list_for_each(tmp, &server->smb_ses_list) { |
96daf2b0 | 329 | ses = list_entry(tmp, struct cifs_ses, smb_ses_list); |
14fbf50d JL |
330 | ses->need_reconnect = true; |
331 | ses->ipc_tid = 0; | |
f1987b44 | 332 | list_for_each(tmp2, &ses->tcon_list) { |
96daf2b0 | 333 | tcon = list_entry(tmp2, struct cifs_tcon, tcon_list); |
3b795210 | 334 | tcon->need_reconnect = true; |
1da177e4 | 335 | } |
1da177e4 | 336 | } |
3f9bcca7 | 337 | spin_unlock(&cifs_tcp_ses_lock); |
2b84a36c | 338 | |
1da177e4 | 339 | /* do not want to be sending data on a socket we are freeing */ |
2b84a36c | 340 | cFYI(1, "%s: tearing down socket", __func__); |
72ca545b | 341 | mutex_lock(&server->srv_mutex); |
fb8c4b14 | 342 | if (server->ssocket) { |
b6b38f70 JP |
343 | cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state, |
344 | server->ssocket->flags); | |
91cf45f0 | 345 | kernel_sock_shutdown(server->ssocket, SHUT_WR); |
b6b38f70 | 346 | cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx", |
467a8f8d | 347 | server->ssocket->state, |
b6b38f70 | 348 | server->ssocket->flags); |
1da177e4 LT |
349 | sock_release(server->ssocket); |
350 | server->ssocket = NULL; | |
351 | } | |
5d0d2882 SP |
352 | server->sequence_number = 0; |
353 | server->session_estab = false; | |
21e73393 SP |
354 | kfree(server->session_key.response); |
355 | server->session_key.response = NULL; | |
356 | server->session_key.len = 0; | |
fda35943 | 357 | server->lstrp = jiffies; |
2b84a36c | 358 | mutex_unlock(&server->srv_mutex); |
1da177e4 | 359 | |
2b84a36c | 360 | /* mark submitted MIDs for retry and issue callback */ |
3c1105df JL |
361 | INIT_LIST_HEAD(&retry_list); |
362 | cFYI(1, "%s: moving mids to private list", __func__); | |
1da177e4 | 363 | spin_lock(&GlobalMid_Lock); |
2b84a36c JL |
364 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
365 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 PS |
366 | if (mid_entry->mid_state == MID_REQUEST_SUBMITTED) |
367 | mid_entry->mid_state = MID_RETRY_NEEDED; | |
3c1105df JL |
368 | list_move(&mid_entry->qhead, &retry_list); |
369 | } | |
370 | spin_unlock(&GlobalMid_Lock); | |
371 | ||
372 | cFYI(1, "%s: issuing mid callbacks", __func__); | |
373 | list_for_each_safe(tmp, tmp2, &retry_list) { | |
374 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
2b84a36c JL |
375 | list_del_init(&mid_entry->qhead); |
376 | mid_entry->callback(mid_entry); | |
1da177e4 | 377 | } |
1da177e4 | 378 | |
7fdbaa1b | 379 | do { |
6c3d8909 | 380 | try_to_freeze(); |
a9f1b85e PS |
381 | |
382 | /* we should try only the port we connected to before */ | |
383 | rc = generic_ip_connect(server); | |
fb8c4b14 | 384 | if (rc) { |
b6b38f70 | 385 | cFYI(1, "reconnect error %d", rc); |
0cb766ae | 386 | msleep(3000); |
1da177e4 LT |
387 | } else { |
388 | atomic_inc(&tcpSesReconnectCount); | |
389 | spin_lock(&GlobalMid_Lock); | |
469ee614 | 390 | if (server->tcpStatus != CifsExiting) |
fd88ce93 | 391 | server->tcpStatus = CifsNeedNegotiate; |
fb8c4b14 | 392 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 393 | } |
7fdbaa1b | 394 | } while (server->tcpStatus == CifsNeedReconnect); |
2b84a36c | 395 | |
1da177e4 LT |
396 | return rc; |
397 | } | |
398 | ||
c74093b6 JL |
399 | static void |
400 | cifs_echo_request(struct work_struct *work) | |
401 | { | |
402 | int rc; | |
403 | struct TCP_Server_Info *server = container_of(work, | |
404 | struct TCP_Server_Info, echo.work); | |
405 | ||
247ec9b4 | 406 | /* |
f6d76178 PS |
407 | * We cannot send an echo if it is disabled or until the |
408 | * NEGOTIATE_PROTOCOL request is done, which is indicated by | |
409 | * server->ops->need_neg() == true. Also, no need to ping if | |
410 | * we got a response recently. | |
247ec9b4 | 411 | */ |
286170aa | 412 | if (!server->ops->need_neg || server->ops->need_neg(server) || |
f6d76178 | 413 | (server->ops->can_echo && !server->ops->can_echo(server)) || |
247ec9b4 | 414 | time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ)) |
c74093b6 JL |
415 | goto requeue_echo; |
416 | ||
f6d76178 | 417 | rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS; |
c74093b6 JL |
418 | if (rc) |
419 | cFYI(1, "Unable to send echo request to server: %s", | |
420 | server->hostname); | |
421 | ||
422 | requeue_echo: | |
da472fc8 | 423 | queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL); |
c74093b6 JL |
424 | } |
425 | ||
3d9c2472 | 426 | static bool |
2a37ef94 | 427 | allocate_buffers(struct TCP_Server_Info *server) |
3d9c2472 | 428 | { |
2a37ef94 JL |
429 | if (!server->bigbuf) { |
430 | server->bigbuf = (char *)cifs_buf_get(); | |
431 | if (!server->bigbuf) { | |
3d9c2472 PS |
432 | cERROR(1, "No memory for large SMB response"); |
433 | msleep(3000); | |
434 | /* retry will check if exiting */ | |
435 | return false; | |
436 | } | |
2a37ef94 | 437 | } else if (server->large_buf) { |
3d9c2472 | 438 | /* we are reusing a dirty large buf, clear its start */ |
1887f601 | 439 | memset(server->bigbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
440 | } |
441 | ||
2a37ef94 JL |
442 | if (!server->smallbuf) { |
443 | server->smallbuf = (char *)cifs_small_buf_get(); | |
444 | if (!server->smallbuf) { | |
3d9c2472 PS |
445 | cERROR(1, "No memory for SMB response"); |
446 | msleep(1000); | |
447 | /* retry will check if exiting */ | |
448 | return false; | |
449 | } | |
450 | /* beginning of smb buffer is cleared in our buf_get */ | |
451 | } else { | |
452 | /* if existing small buf clear beginning */ | |
1887f601 | 453 | memset(server->smallbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
454 | } |
455 | ||
3d9c2472 PS |
456 | return true; |
457 | } | |
458 | ||
ba749e6d JL |
459 | static bool |
460 | server_unresponsive(struct TCP_Server_Info *server) | |
461 | { | |
6dae51a5 PS |
462 | /* |
463 | * We need to wait 2 echo intervals to make sure we handle such | |
464 | * situations right: | |
465 | * 1s client sends a normal SMB request | |
466 | * 2s client gets a response | |
467 | * 30s echo workqueue job pops, and decides we got a response recently | |
468 | * and don't need to send another | |
469 | * ... | |
470 | * 65s kernel_recvmsg times out, and we see that we haven't gotten | |
471 | * a response in >60s. | |
472 | */ | |
473 | if (server->tcpStatus == CifsGood && | |
474 | time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) { | |
ba749e6d JL |
475 | cERROR(1, "Server %s has not responded in %d seconds. " |
476 | "Reconnecting...", server->hostname, | |
6dae51a5 | 477 | (2 * SMB_ECHO_INTERVAL) / HZ); |
ba749e6d JL |
478 | cifs_reconnect(server); |
479 | wake_up(&server->response_q); | |
480 | return true; | |
481 | } | |
482 | ||
483 | return false; | |
484 | } | |
485 | ||
42c4dfc2 JL |
486 | /* |
487 | * kvec_array_init - clone a kvec array, and advance into it | |
488 | * @new: pointer to memory for cloned array | |
489 | * @iov: pointer to original array | |
490 | * @nr_segs: number of members in original array | |
491 | * @bytes: number of bytes to advance into the cloned array | |
492 | * | |
493 | * This function will copy the array provided in iov to a section of memory | |
494 | * and advance the specified number of bytes into the new array. It returns | |
495 | * the number of segments in the new array. "new" must be at least as big as | |
496 | * the original iov array. | |
497 | */ | |
498 | static unsigned int | |
499 | kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs, | |
500 | size_t bytes) | |
501 | { | |
502 | size_t base = 0; | |
503 | ||
504 | while (bytes || !iov->iov_len) { | |
505 | int copy = min(bytes, iov->iov_len); | |
506 | ||
507 | bytes -= copy; | |
508 | base += copy; | |
509 | if (iov->iov_len == base) { | |
510 | iov++; | |
511 | nr_segs--; | |
512 | base = 0; | |
513 | } | |
514 | } | |
515 | memcpy(new, iov, sizeof(*iov) * nr_segs); | |
516 | new->iov_base += base; | |
517 | new->iov_len -= base; | |
518 | return nr_segs; | |
519 | } | |
520 | ||
1041e3f9 JL |
521 | static struct kvec * |
522 | get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs) | |
e7015fb1 | 523 | { |
1041e3f9 JL |
524 | struct kvec *new_iov; |
525 | ||
526 | if (server->iov && nr_segs <= server->nr_iov) | |
527 | return server->iov; | |
528 | ||
529 | /* not big enough -- allocate a new one and release the old */ | |
530 | new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS); | |
531 | if (new_iov) { | |
532 | kfree(server->iov); | |
533 | server->iov = new_iov; | |
534 | server->nr_iov = nr_segs; | |
535 | } | |
536 | return new_iov; | |
537 | } | |
538 | ||
e28bc5b1 JL |
539 | int |
540 | cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig, | |
541 | unsigned int nr_segs, unsigned int to_read) | |
e7015fb1 | 542 | { |
a52c1eb7 JL |
543 | int length = 0; |
544 | int total_read; | |
42c4dfc2 | 545 | unsigned int segs; |
e831e6cf | 546 | struct msghdr smb_msg; |
42c4dfc2 JL |
547 | struct kvec *iov; |
548 | ||
1041e3f9 | 549 | iov = get_server_iovec(server, nr_segs); |
42c4dfc2 JL |
550 | if (!iov) |
551 | return -ENOMEM; | |
e7015fb1 | 552 | |
e831e6cf JL |
553 | smb_msg.msg_control = NULL; |
554 | smb_msg.msg_controllen = 0; | |
555 | ||
a52c1eb7 | 556 | for (total_read = 0; to_read; total_read += length, to_read -= length) { |
95edcff4 JL |
557 | try_to_freeze(); |
558 | ||
ba749e6d | 559 | if (server_unresponsive(server)) { |
a52c1eb7 | 560 | total_read = -EAGAIN; |
ba749e6d JL |
561 | break; |
562 | } | |
563 | ||
42c4dfc2 JL |
564 | segs = kvec_array_init(iov, iov_orig, nr_segs, total_read); |
565 | ||
566 | length = kernel_recvmsg(server->ssocket, &smb_msg, | |
567 | iov, segs, to_read, 0); | |
e7015fb1 | 568 | |
e7015fb1 | 569 | if (server->tcpStatus == CifsExiting) { |
a52c1eb7 | 570 | total_read = -ESHUTDOWN; |
e7015fb1 PS |
571 | break; |
572 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
573 | cifs_reconnect(server); | |
a52c1eb7 | 574 | total_read = -EAGAIN; |
e7015fb1 PS |
575 | break; |
576 | } else if (length == -ERESTARTSYS || | |
577 | length == -EAGAIN || | |
578 | length == -EINTR) { | |
579 | /* | |
580 | * Minimum sleep to prevent looping, allowing socket | |
581 | * to clear and app threads to set tcpStatus | |
582 | * CifsNeedReconnect if server hung. | |
583 | */ | |
584 | usleep_range(1000, 2000); | |
585 | length = 0; | |
a52c1eb7 | 586 | continue; |
e7015fb1 | 587 | } else if (length <= 0) { |
a52c1eb7 JL |
588 | cFYI(1, "Received no data or error: expecting %d " |
589 | "got %d", to_read, length); | |
e7015fb1 | 590 | cifs_reconnect(server); |
a52c1eb7 | 591 | total_read = -EAGAIN; |
e7015fb1 PS |
592 | break; |
593 | } | |
594 | } | |
a52c1eb7 | 595 | return total_read; |
e7015fb1 | 596 | } |
e7015fb1 | 597 | |
e28bc5b1 JL |
598 | int |
599 | cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, | |
600 | unsigned int to_read) | |
42c4dfc2 JL |
601 | { |
602 | struct kvec iov; | |
603 | ||
604 | iov.iov_base = buf; | |
605 | iov.iov_len = to_read; | |
606 | ||
e28bc5b1 | 607 | return cifs_readv_from_socket(server, &iov, 1, to_read); |
e7015fb1 PS |
608 | } |
609 | ||
98bac62c | 610 | static bool |
fe11e4cc | 611 | is_smb_response(struct TCP_Server_Info *server, unsigned char type) |
98bac62c | 612 | { |
98bac62c PS |
613 | /* |
614 | * The first byte big endian of the length field, | |
615 | * is actually not part of the length but the type | |
616 | * with the most common, zero, as regular data. | |
617 | */ | |
fe11e4cc JL |
618 | switch (type) { |
619 | case RFC1002_SESSION_MESSAGE: | |
620 | /* Regular SMB response */ | |
621 | return true; | |
622 | case RFC1002_SESSION_KEEP_ALIVE: | |
623 | cFYI(1, "RFC 1002 session keep alive"); | |
624 | break; | |
625 | case RFC1002_POSITIVE_SESSION_RESPONSE: | |
626 | cFYI(1, "RFC 1002 positive session response"); | |
627 | break; | |
628 | case RFC1002_NEGATIVE_SESSION_RESPONSE: | |
98bac62c PS |
629 | /* |
630 | * We get this from Windows 98 instead of an error on | |
631 | * SMB negprot response. | |
632 | */ | |
fe11e4cc | 633 | cFYI(1, "RFC 1002 negative session response"); |
98bac62c PS |
634 | /* give server a second to clean up */ |
635 | msleep(1000); | |
636 | /* | |
637 | * Always try 445 first on reconnect since we get NACK | |
638 | * on some if we ever connected to port 139 (the NACK | |
639 | * is since we do not begin with RFC1001 session | |
640 | * initialize frame). | |
641 | */ | |
fe11e4cc | 642 | cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT); |
98bac62c PS |
643 | cifs_reconnect(server); |
644 | wake_up(&server->response_q); | |
fe11e4cc JL |
645 | break; |
646 | default: | |
647 | cERROR(1, "RFC 1002 unknown response type 0x%x", type); | |
98bac62c | 648 | cifs_reconnect(server); |
98bac62c PS |
649 | } |
650 | ||
fe11e4cc | 651 | return false; |
98bac62c PS |
652 | } |
653 | ||
e28bc5b1 JL |
654 | void |
655 | dequeue_mid(struct mid_q_entry *mid, bool malformed) | |
ea1f4502 | 656 | { |
ad69bae1 | 657 | #ifdef CONFIG_CIFS_STATS2 |
ea1f4502 | 658 | mid->when_received = jiffies; |
ad69bae1 | 659 | #endif |
ea1f4502 JL |
660 | spin_lock(&GlobalMid_Lock); |
661 | if (!malformed) | |
7c9421e1 | 662 | mid->mid_state = MID_RESPONSE_RECEIVED; |
ea1f4502 | 663 | else |
7c9421e1 | 664 | mid->mid_state = MID_RESPONSE_MALFORMED; |
ea1f4502 | 665 | list_del_init(&mid->qhead); |
ad69bae1 | 666 | spin_unlock(&GlobalMid_Lock); |
ea1f4502 | 667 | } |
ad69bae1 | 668 | |
c8054ebd JL |
669 | static void |
670 | handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, | |
d4e4854f | 671 | char *buf, int malformed) |
ea1f4502 | 672 | { |
316cf94a PS |
673 | if (server->ops->check_trans2 && |
674 | server->ops->check_trans2(mid, server, buf, malformed)) | |
c8054ebd | 675 | return; |
ea1f4502 | 676 | mid->resp_buf = buf; |
7c9421e1 | 677 | mid->large_buf = server->large_buf; |
2a37ef94 JL |
678 | /* Was previous buf put in mpx struct for multi-rsp? */ |
679 | if (!mid->multiRsp) { | |
680 | /* smb buffer will be freed by user thread */ | |
681 | if (server->large_buf) | |
682 | server->bigbuf = NULL; | |
683 | else | |
684 | server->smallbuf = NULL; | |
685 | } | |
ffc00e27 | 686 | dequeue_mid(mid, malformed); |
ad69bae1 PS |
687 | } |
688 | ||
762dfd10 PS |
689 | static void clean_demultiplex_info(struct TCP_Server_Info *server) |
690 | { | |
691 | int length; | |
692 | ||
693 | /* take it off the list, if it's not already */ | |
694 | spin_lock(&cifs_tcp_ses_lock); | |
695 | list_del_init(&server->tcp_ses_list); | |
696 | spin_unlock(&cifs_tcp_ses_lock); | |
697 | ||
698 | spin_lock(&GlobalMid_Lock); | |
699 | server->tcpStatus = CifsExiting; | |
700 | spin_unlock(&GlobalMid_Lock); | |
701 | wake_up_all(&server->response_q); | |
702 | ||
2d86dbc9 | 703 | /* check if we have blocked requests that need to free */ |
fc40f9cf | 704 | spin_lock(&server->req_lock); |
2d86dbc9 PS |
705 | if (server->credits <= 0) |
706 | server->credits = 1; | |
fc40f9cf | 707 | spin_unlock(&server->req_lock); |
762dfd10 PS |
708 | /* |
709 | * Although there should not be any requests blocked on this queue it | |
710 | * can not hurt to be paranoid and try to wake up requests that may | |
711 | * haven been blocked when more than 50 at time were on the wire to the | |
712 | * same server - they now will see the session is in exit state and get | |
713 | * out of SendReceive. | |
714 | */ | |
715 | wake_up_all(&server->request_q); | |
716 | /* give those requests time to exit */ | |
717 | msleep(125); | |
718 | ||
719 | if (server->ssocket) { | |
720 | sock_release(server->ssocket); | |
721 | server->ssocket = NULL; | |
722 | } | |
723 | ||
724 | if (!list_empty(&server->pending_mid_q)) { | |
725 | struct list_head dispose_list; | |
726 | struct mid_q_entry *mid_entry; | |
727 | struct list_head *tmp, *tmp2; | |
728 | ||
729 | INIT_LIST_HEAD(&dispose_list); | |
730 | spin_lock(&GlobalMid_Lock); | |
731 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { | |
732 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 PS |
733 | cFYI(1, "Clearing mid 0x%llx", mid_entry->mid); |
734 | mid_entry->mid_state = MID_SHUTDOWN; | |
762dfd10 PS |
735 | list_move(&mid_entry->qhead, &dispose_list); |
736 | } | |
737 | spin_unlock(&GlobalMid_Lock); | |
738 | ||
739 | /* now walk dispose list and issue callbacks */ | |
740 | list_for_each_safe(tmp, tmp2, &dispose_list) { | |
741 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 | 742 | cFYI(1, "Callback mid 0x%llx", mid_entry->mid); |
762dfd10 PS |
743 | list_del_init(&mid_entry->qhead); |
744 | mid_entry->callback(mid_entry); | |
745 | } | |
746 | /* 1/8th of sec is more than enough time for them to exit */ | |
747 | msleep(125); | |
748 | } | |
749 | ||
750 | if (!list_empty(&server->pending_mid_q)) { | |
751 | /* | |
752 | * mpx threads have not exited yet give them at least the smb | |
753 | * send timeout time for long ops. | |
754 | * | |
755 | * Due to delays on oplock break requests, we need to wait at | |
756 | * least 45 seconds before giving up on a request getting a | |
757 | * response and going ahead and killing cifsd. | |
758 | */ | |
759 | cFYI(1, "Wait for exit from demultiplex thread"); | |
760 | msleep(46000); | |
761 | /* | |
762 | * If threads still have not exited they are probably never | |
763 | * coming home not much else we can do but free the memory. | |
764 | */ | |
765 | } | |
766 | ||
767 | kfree(server->hostname); | |
1041e3f9 | 768 | kfree(server->iov); |
762dfd10 PS |
769 | kfree(server); |
770 | ||
771 | length = atomic_dec_return(&tcpSesAllocCount); | |
772 | if (length > 0) | |
773 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, | |
774 | GFP_KERNEL); | |
775 | } | |
776 | ||
e9097ab4 JL |
777 | static int |
778 | standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
779 | { | |
780 | int length; | |
781 | char *buf = server->smallbuf; | |
d4e4854f | 782 | unsigned int pdu_length = get_rfc1002_length(buf); |
e9097ab4 JL |
783 | |
784 | /* make sure this will fit in a large buffer */ | |
1887f601 | 785 | if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) { |
e9097ab4 JL |
786 | cERROR(1, "SMB response too long (%u bytes)", |
787 | pdu_length); | |
788 | cifs_reconnect(server); | |
789 | wake_up(&server->response_q); | |
790 | return -EAGAIN; | |
791 | } | |
792 | ||
793 | /* switch to large buffer if too big for a small one */ | |
794 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { | |
795 | server->large_buf = true; | |
d4e4854f | 796 | memcpy(server->bigbuf, buf, server->total_read); |
e9097ab4 | 797 | buf = server->bigbuf; |
e9097ab4 JL |
798 | } |
799 | ||
800 | /* now read the rest */ | |
1887f601 PS |
801 | length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, |
802 | pdu_length - HEADER_SIZE(server) + 1 + 4); | |
e9097ab4 JL |
803 | if (length < 0) |
804 | return length; | |
805 | server->total_read += length; | |
806 | ||
d4e4854f | 807 | dump_smb(buf, server->total_read); |
e9097ab4 JL |
808 | |
809 | /* | |
810 | * We know that we received enough to get to the MID as we | |
811 | * checked the pdu_length earlier. Now check to see | |
812 | * if the rest of the header is OK. We borrow the length | |
813 | * var for the rest of the loop to avoid a new stack var. | |
814 | * | |
815 | * 48 bytes is enough to display the header and a little bit | |
816 | * into the payload for debugging purposes. | |
817 | */ | |
8aa26f3e | 818 | length = server->ops->check_message(buf, server->total_read); |
e9097ab4 JL |
819 | if (length != 0) |
820 | cifs_dump_mem("Bad SMB: ", buf, | |
821 | min_t(unsigned int, server->total_read, 48)); | |
822 | ||
2e44b288 PS |
823 | if (server->ops->is_status_pending && |
824 | server->ops->is_status_pending(buf, server, length)) | |
825 | return -1; | |
826 | ||
ff4fa4a2 JL |
827 | if (!mid) |
828 | return length; | |
e9097ab4 | 829 | |
d4e4854f | 830 | handle_mid(mid, server, buf, length); |
ff4fa4a2 | 831 | return 0; |
e9097ab4 JL |
832 | } |
833 | ||
1da177e4 | 834 | static int |
7c97c200 | 835 | cifs_demultiplex_thread(void *p) |
1da177e4 LT |
836 | { |
837 | int length; | |
7c97c200 | 838 | struct TCP_Server_Info *server = p; |
2a37ef94 JL |
839 | unsigned int pdu_length; |
840 | char *buf = NULL; | |
1da177e4 LT |
841 | struct task_struct *task_to_wake = NULL; |
842 | struct mid_q_entry *mid_entry; | |
1da177e4 | 843 | |
1da177e4 | 844 | current->flags |= PF_MEMALLOC; |
b6b38f70 | 845 | cFYI(1, "Demultiplex PID: %d", task_pid_nr(current)); |
93d0ec85 JL |
846 | |
847 | length = atomic_inc_return(&tcpSesAllocCount); | |
848 | if (length > 1) | |
26f57364 SF |
849 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, |
850 | GFP_KERNEL); | |
1da177e4 | 851 | |
83144186 | 852 | set_freezable(); |
469ee614 | 853 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
854 | if (try_to_freeze()) |
855 | continue; | |
b8643e1b | 856 | |
2a37ef94 | 857 | if (!allocate_buffers(server)) |
3d9c2472 | 858 | continue; |
b8643e1b | 859 | |
2a37ef94 | 860 | server->large_buf = false; |
2a37ef94 | 861 | buf = server->smallbuf; |
f01d5e14 | 862 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 863 | |
e28bc5b1 | 864 | length = cifs_read_from_socket(server, buf, pdu_length); |
a52c1eb7 | 865 | if (length < 0) |
1da177e4 | 866 | continue; |
2a37ef94 | 867 | server->total_read = length; |
1da177e4 | 868 | |
98bac62c PS |
869 | /* |
870 | * The right amount was read from socket - 4 bytes, | |
871 | * so we can now interpret the length field. | |
872 | */ | |
d4e4854f | 873 | pdu_length = get_rfc1002_length(buf); |
70ca734a | 874 | |
fe11e4cc JL |
875 | cFYI(1, "RFC1002 header 0x%x", pdu_length); |
876 | if (!is_smb_response(server, buf[0])) | |
fb8c4b14 | 877 | continue; |
e4eb295d | 878 | |
89482a56 | 879 | /* make sure we have enough to get to the MID */ |
1887f601 | 880 | if (pdu_length < HEADER_SIZE(server) - 1 - 4) { |
89482a56 JL |
881 | cERROR(1, "SMB response too short (%u bytes)", |
882 | pdu_length); | |
883 | cifs_reconnect(server); | |
884 | wake_up(&server->response_q); | |
885 | continue; | |
e4eb295d | 886 | } |
e7015fb1 | 887 | |
89482a56 | 888 | /* read down to the MID */ |
e28bc5b1 | 889 | length = cifs_read_from_socket(server, buf + 4, |
1887f601 | 890 | HEADER_SIZE(server) - 1 - 4); |
89482a56 | 891 | if (length < 0) |
e4eb295d | 892 | continue; |
2a37ef94 | 893 | server->total_read += length; |
1da177e4 | 894 | |
8aa26f3e | 895 | mid_entry = server->ops->find_mid(server, buf); |
50c2f753 | 896 | |
44d22d84 JL |
897 | if (!mid_entry || !mid_entry->receive) |
898 | length = standard_receive3(server, mid_entry); | |
899 | else | |
900 | length = mid_entry->receive(server, mid_entry); | |
71823baf | 901 | |
e9097ab4 | 902 | if (length < 0) |
fe11e4cc | 903 | continue; |
1da177e4 | 904 | |
d4e4854f | 905 | if (server->large_buf) |
2a37ef94 | 906 | buf = server->bigbuf; |
fda35943 | 907 | |
fda35943 | 908 | server->lstrp = jiffies; |
2b84a36c | 909 | if (mid_entry != NULL) { |
2a37ef94 JL |
910 | if (!mid_entry->multiRsp || mid_entry->multiEnd) |
911 | mid_entry->callback(mid_entry); | |
7f0adb53 PS |
912 | } else if (!server->ops->is_oplock_break || |
913 | !server->ops->is_oplock_break(buf, server)) { | |
b6b38f70 | 914 | cERROR(1, "No task to wake, unknown frame received! " |
8097531a | 915 | "NumMids %d", atomic_read(&midCount)); |
1887f601 PS |
916 | cifs_dump_mem("Received Data is: ", buf, |
917 | HEADER_SIZE(server)); | |
3979877e | 918 | #ifdef CONFIG_CIFS_DEBUG2 |
7f0adb53 PS |
919 | if (server->ops->dump_detail) |
920 | server->ops->dump_detail(buf); | |
3979877e SF |
921 | cifs_dump_mids(server); |
922 | #endif /* CIFS_DEBUG2 */ | |
50c2f753 | 923 | |
e4eb295d SF |
924 | } |
925 | } /* end while !EXITING */ | |
926 | ||
fd62cb7e | 927 | /* buffer usually freed in free_mid - need to free it here on exit */ |
2a37ef94 JL |
928 | cifs_buf_release(server->bigbuf); |
929 | if (server->smallbuf) /* no sense logging a debug message if NULL */ | |
930 | cifs_small_buf_release(server->smallbuf); | |
1da177e4 | 931 | |
b1c8d2b4 | 932 | task_to_wake = xchg(&server->tsk, NULL); |
762dfd10 | 933 | clean_demultiplex_info(server); |
50c2f753 | 934 | |
b1c8d2b4 JL |
935 | /* if server->tsk was NULL then wait for a signal before exiting */ |
936 | if (!task_to_wake) { | |
937 | set_current_state(TASK_INTERRUPTIBLE); | |
938 | while (!signal_pending(current)) { | |
939 | schedule(); | |
940 | set_current_state(TASK_INTERRUPTIBLE); | |
941 | } | |
942 | set_current_state(TASK_RUNNING); | |
943 | } | |
944 | ||
0468a2cf | 945 | module_put_and_exit(0); |
1da177e4 LT |
946 | } |
947 | ||
c359cf3c JL |
948 | /* extract the host portion of the UNC string */ |
949 | static char * | |
950 | extract_hostname(const char *unc) | |
951 | { | |
952 | const char *src; | |
953 | char *dst, *delim; | |
954 | unsigned int len; | |
955 | ||
956 | /* skip double chars at beginning of string */ | |
957 | /* BB: check validity of these bytes? */ | |
958 | src = unc + 2; | |
959 | ||
960 | /* delimiter between hostname and sharename is always '\\' now */ | |
961 | delim = strchr(src, '\\'); | |
962 | if (!delim) | |
963 | return ERR_PTR(-EINVAL); | |
964 | ||
965 | len = delim - src; | |
966 | dst = kmalloc((len + 1), GFP_KERNEL); | |
967 | if (dst == NULL) | |
968 | return ERR_PTR(-ENOMEM); | |
969 | ||
970 | memcpy(dst, src, len); | |
971 | dst[len] = '\0'; | |
972 | ||
973 | return dst; | |
974 | } | |
975 | ||
8830d7e0 SP |
976 | static int get_option_ul(substring_t args[], unsigned long *option) |
977 | { | |
978 | int rc; | |
979 | char *string; | |
980 | ||
981 | string = match_strdup(args); | |
982 | if (string == NULL) | |
983 | return -ENOMEM; | |
bfa890a3 | 984 | rc = kstrtoul(string, 0, option); |
8830d7e0 SP |
985 | kfree(string); |
986 | ||
987 | return rc; | |
988 | } | |
989 | ||
990 | ||
991 | static int cifs_parse_security_flavors(char *value, | |
992 | struct smb_vol *vol) | |
993 | { | |
994 | ||
995 | substring_t args[MAX_OPT_ARGS]; | |
996 | ||
997 | switch (match_token(value, cifs_secflavor_tokens, args)) { | |
998 | case Opt_sec_krb5: | |
999 | vol->secFlg |= CIFSSEC_MAY_KRB5; | |
1000 | break; | |
1001 | case Opt_sec_krb5i: | |
1002 | vol->secFlg |= CIFSSEC_MAY_KRB5 | CIFSSEC_MUST_SIGN; | |
1003 | break; | |
1004 | case Opt_sec_krb5p: | |
1005 | /* vol->secFlg |= CIFSSEC_MUST_SEAL | CIFSSEC_MAY_KRB5; */ | |
1006 | cERROR(1, "Krb5 cifs privacy not supported"); | |
1007 | break; | |
1008 | case Opt_sec_ntlmssp: | |
1009 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP; | |
1010 | break; | |
1011 | case Opt_sec_ntlmsspi: | |
1012 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP | CIFSSEC_MUST_SIGN; | |
1013 | break; | |
1014 | case Opt_ntlm: | |
1015 | /* ntlm is default so can be turned off too */ | |
1016 | vol->secFlg |= CIFSSEC_MAY_NTLM; | |
1017 | break; | |
1018 | case Opt_sec_ntlmi: | |
1019 | vol->secFlg |= CIFSSEC_MAY_NTLM | CIFSSEC_MUST_SIGN; | |
1020 | break; | |
7659624f | 1021 | case Opt_sec_ntlmv2: |
8830d7e0 SP |
1022 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
1023 | break; | |
1024 | case Opt_sec_ntlmv2i: | |
1025 | vol->secFlg |= CIFSSEC_MAY_NTLMV2 | CIFSSEC_MUST_SIGN; | |
1026 | break; | |
1027 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
1028 | case Opt_sec_lanman: | |
1029 | vol->secFlg |= CIFSSEC_MAY_LANMAN; | |
1030 | break; | |
1031 | #endif | |
1032 | case Opt_sec_none: | |
1033 | vol->nullauth = 1; | |
1034 | break; | |
1035 | default: | |
1036 | cERROR(1, "bad security option: %s", value); | |
1037 | return 1; | |
1038 | } | |
1039 | ||
1040 | return 0; | |
1041 | } | |
1042 | ||
15b6a473 JL |
1043 | static int |
1044 | cifs_parse_cache_flavor(char *value, struct smb_vol *vol) | |
1045 | { | |
1046 | substring_t args[MAX_OPT_ARGS]; | |
1047 | ||
1048 | switch (match_token(value, cifs_cacheflavor_tokens, args)) { | |
1049 | case Opt_cache_loose: | |
1050 | vol->direct_io = false; | |
1051 | vol->strict_io = false; | |
1052 | break; | |
1053 | case Opt_cache_strict: | |
1054 | vol->direct_io = false; | |
1055 | vol->strict_io = true; | |
1056 | break; | |
1057 | case Opt_cache_none: | |
1058 | vol->direct_io = true; | |
1059 | vol->strict_io = false; | |
1060 | break; | |
1061 | default: | |
1062 | cERROR(1, "bad cache= option: %s", value); | |
1063 | return 1; | |
1064 | } | |
1065 | return 0; | |
1066 | } | |
1067 | ||
23db65f5 JL |
1068 | static int |
1069 | cifs_parse_smb_version(char *value, struct smb_vol *vol) | |
1070 | { | |
1071 | substring_t args[MAX_OPT_ARGS]; | |
1072 | ||
1073 | switch (match_token(value, cifs_smb_version_tokens, args)) { | |
1074 | case Smb_1: | |
1075 | vol->ops = &smb1_operations; | |
1076 | vol->vals = &smb1_values; | |
1077 | break; | |
1080ef75 | 1078 | #ifdef CONFIG_CIFS_SMB2 |
dd446b16 SF |
1079 | case Smb_20: |
1080 | vol->ops = &smb21_operations; /* currently identical with 2.1 */ | |
1081 | vol->vals = &smb20_values; | |
1082 | break; | |
1080ef75 SF |
1083 | case Smb_21: |
1084 | vol->ops = &smb21_operations; | |
1085 | vol->vals = &smb21_values; | |
1086 | break; | |
e4aa25e7 | 1087 | case Smb_30: |
38107d45 | 1088 | vol->ops = &smb30_operations; |
e4aa25e7 SF |
1089 | vol->vals = &smb30_values; |
1090 | break; | |
1080ef75 | 1091 | #endif |
23db65f5 JL |
1092 | default: |
1093 | cERROR(1, "Unknown vers= option specified: %s", value); | |
1094 | return 1; | |
1095 | } | |
1096 | return 0; | |
1097 | } | |
1098 | ||
d387a5c5 JL |
1099 | /* |
1100 | * Parse a devname into substrings and populate the vol->UNC and vol->prepath | |
1101 | * fields with the result. Returns 0 on success and an error otherwise. | |
1102 | */ | |
1103 | static int | |
1104 | cifs_parse_devname(const char *devname, struct smb_vol *vol) | |
1105 | { | |
1106 | char *pos; | |
1107 | const char *delims = "/\\"; | |
1108 | size_t len; | |
1109 | ||
1110 | /* make sure we have a valid UNC double delimiter prefix */ | |
1111 | len = strspn(devname, delims); | |
1112 | if (len != 2) | |
1113 | return -EINVAL; | |
1114 | ||
1115 | /* find delimiter between host and sharename */ | |
1116 | pos = strpbrk(devname + 2, delims); | |
1117 | if (!pos) | |
1118 | return -EINVAL; | |
1119 | ||
1120 | /* skip past delimiter */ | |
1121 | ++pos; | |
1122 | ||
1123 | /* now go until next delimiter or end of string */ | |
1124 | len = strcspn(pos, delims); | |
1125 | ||
1126 | /* move "pos" up to delimiter or NULL */ | |
1127 | pos += len; | |
1128 | vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL); | |
1129 | if (!vol->UNC) | |
1130 | return -ENOMEM; | |
1131 | ||
1132 | convert_delimiter(vol->UNC, '\\'); | |
1133 | ||
1134 | /* If pos is NULL, or is a bogus trailing delimiter then no prepath */ | |
1135 | if (!*pos++ || !*pos) | |
1136 | return 0; | |
1137 | ||
1138 | vol->prepath = kstrdup(pos, GFP_KERNEL); | |
1139 | if (!vol->prepath) | |
1140 | return -ENOMEM; | |
1141 | ||
1142 | return 0; | |
1143 | } | |
1144 | ||
1da177e4 | 1145 | static int |
b946845a | 1146 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
50c2f753 | 1147 | struct smb_vol *vol) |
1da177e4 | 1148 | { |
8830d7e0 | 1149 | char *data, *end; |
957df453 | 1150 | char *mountdata_copy = NULL, *options; |
1da177e4 LT |
1151 | unsigned int temp_len, i, j; |
1152 | char separator[2]; | |
9b9d6b24 JL |
1153 | short int override_uid = -1; |
1154 | short int override_gid = -1; | |
1155 | bool uid_specified = false; | |
1156 | bool gid_specified = false; | |
d8162558 JL |
1157 | bool sloppy = false; |
1158 | char *invalid = NULL; | |
88463999 | 1159 | char *nodename = utsname()->nodename; |
8830d7e0 SP |
1160 | char *string = NULL; |
1161 | char *tmp_end, *value; | |
1162 | char delim; | |
b979aaa1 JL |
1163 | bool got_ip = false; |
1164 | unsigned short port = 0; | |
1165 | struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr; | |
1da177e4 LT |
1166 | |
1167 | separator[0] = ','; | |
50c2f753 | 1168 | separator[1] = 0; |
8830d7e0 | 1169 | delim = separator[0]; |
1da177e4 | 1170 | |
6ee9542a JL |
1171 | /* ensure we always start with zeroed-out smb_vol */ |
1172 | memset(vol, 0, sizeof(*vol)); | |
1173 | ||
88463999 JL |
1174 | /* |
1175 | * does not have to be perfect mapping since field is | |
1176 | * informational, only used for servers that do not support | |
1177 | * port 445 and it can be overridden at mount time | |
1178 | */ | |
1397f2ee JL |
1179 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
1180 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
1181 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
1182 | ||
1397f2ee | 1183 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
1184 | /* null target name indicates to use *SMBSERVR default called name |
1185 | if we end up sending RFC1001 session initialize */ | |
1186 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
1187 | vol->cred_uid = current_uid(); |
1188 | vol->linux_uid = current_uid(); | |
a001e5b5 | 1189 | vol->linux_gid = current_gid(); |
f55ed1a8 JL |
1190 | |
1191 | /* default to only allowing write access to owner of the mount */ | |
1192 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
1193 | |
1194 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
1195 | /* default is always to request posix paths. */ |
1196 | vol->posix_paths = 1; | |
a0c9217f JL |
1197 | /* default to using server inode numbers where available */ |
1198 | vol->server_ino = 1; | |
ac67055e | 1199 | |
1b359204 JL |
1200 | /* default is to use strict cifs caching semantics */ |
1201 | vol->strict_io = true; | |
1202 | ||
6d20e840 SJ |
1203 | vol->actimeo = CIFS_DEF_ACTIMEO; |
1204 | ||
23db65f5 JL |
1205 | /* FIXME: add autonegotiation -- for now, SMB1 is default */ |
1206 | vol->ops = &smb1_operations; | |
1207 | vol->vals = &smb1_values; | |
1208 | ||
b946845a SF |
1209 | if (!mountdata) |
1210 | goto cifs_parse_mount_err; | |
1211 | ||
1212 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); | |
1213 | if (!mountdata_copy) | |
1214 | goto cifs_parse_mount_err; | |
1da177e4 | 1215 | |
b946845a | 1216 | options = mountdata_copy; |
4906e50b | 1217 | end = options + strlen(options); |
8830d7e0 | 1218 | |
50c2f753 | 1219 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 1220 | if (options[4] != 0) { |
1da177e4 LT |
1221 | separator[0] = options[4]; |
1222 | options += 5; | |
1223 | } else { | |
b6b38f70 | 1224 | cFYI(1, "Null separator not allowed"); |
1da177e4 LT |
1225 | } |
1226 | } | |
3d3ea8e6 SP |
1227 | vol->backupuid_specified = false; /* no backup intent for a user */ |
1228 | vol->backupgid_specified = false; /* no backup intent for a group */ | |
50c2f753 | 1229 | |
d387a5c5 JL |
1230 | /* |
1231 | * For now, we ignore -EINVAL errors under the assumption that the | |
1232 | * unc= and prefixpath= options will be usable. | |
1233 | */ | |
1234 | if (cifs_parse_devname(devname, vol) == -ENOMEM) { | |
1235 | printk(KERN_ERR "CIFS: Unable to allocate memory to parse " | |
1236 | "device string.\n"); | |
1237 | goto out_nomem; | |
1238 | } | |
1239 | ||
1da177e4 | 1240 | while ((data = strsep(&options, separator)) != NULL) { |
8830d7e0 SP |
1241 | substring_t args[MAX_OPT_ARGS]; |
1242 | unsigned long option; | |
1243 | int token; | |
1244 | ||
1da177e4 LT |
1245 | if (!*data) |
1246 | continue; | |
1da177e4 | 1247 | |
8830d7e0 SP |
1248 | token = match_token(data, cifs_mount_option_tokens, args); |
1249 | ||
1250 | switch (token) { | |
1251 | ||
1252 | /* Ingnore the following */ | |
1253 | case Opt_ignore: | |
1254 | break; | |
1255 | ||
1256 | /* Boolean values */ | |
1257 | case Opt_user_xattr: | |
1da177e4 | 1258 | vol->no_xattr = 0; |
8830d7e0 SP |
1259 | break; |
1260 | case Opt_nouser_xattr: | |
1da177e4 | 1261 | vol->no_xattr = 1; |
8830d7e0 SP |
1262 | break; |
1263 | case Opt_forceuid: | |
9b9d6b24 | 1264 | override_uid = 1; |
8830d7e0 SP |
1265 | break; |
1266 | case Opt_noforceuid: | |
9b9d6b24 | 1267 | override_uid = 0; |
8830d7e0 | 1268 | break; |
72bd481f JL |
1269 | case Opt_forcegid: |
1270 | override_gid = 1; | |
1271 | break; | |
1272 | case Opt_noforcegid: | |
1273 | override_gid = 0; | |
1274 | break; | |
8830d7e0 | 1275 | case Opt_noblocksend: |
edf1ae40 | 1276 | vol->noblocksnd = 1; |
8830d7e0 SP |
1277 | break; |
1278 | case Opt_noautotune: | |
edf1ae40 | 1279 | vol->noautotune = 1; |
8830d7e0 SP |
1280 | break; |
1281 | case Opt_hard: | |
1da177e4 | 1282 | vol->retry = 1; |
8830d7e0 SP |
1283 | break; |
1284 | case Opt_soft: | |
1da177e4 | 1285 | vol->retry = 0; |
8830d7e0 SP |
1286 | break; |
1287 | case Opt_perm: | |
1da177e4 | 1288 | vol->noperm = 0; |
8830d7e0 SP |
1289 | break; |
1290 | case Opt_noperm: | |
1da177e4 | 1291 | vol->noperm = 1; |
8830d7e0 SP |
1292 | break; |
1293 | case Opt_mapchars: | |
6a0b4824 | 1294 | vol->remap = 1; |
8830d7e0 SP |
1295 | break; |
1296 | case Opt_nomapchars: | |
6a0b4824 | 1297 | vol->remap = 0; |
8830d7e0 SP |
1298 | break; |
1299 | case Opt_sfu: | |
50c2f753 | 1300 | vol->sfu_emul = 1; |
8830d7e0 SP |
1301 | break; |
1302 | case Opt_nosfu: | |
50c2f753 | 1303 | vol->sfu_emul = 0; |
8830d7e0 SP |
1304 | break; |
1305 | case Opt_nodfs: | |
2c1b8615 | 1306 | vol->nodfs = 1; |
8830d7e0 SP |
1307 | break; |
1308 | case Opt_posixpaths: | |
ac67055e | 1309 | vol->posix_paths = 1; |
8830d7e0 SP |
1310 | break; |
1311 | case Opt_noposixpaths: | |
ac67055e | 1312 | vol->posix_paths = 0; |
8830d7e0 SP |
1313 | break; |
1314 | case Opt_nounix: | |
c18c842b | 1315 | vol->no_linux_ext = 1; |
8830d7e0 SP |
1316 | break; |
1317 | case Opt_nocase: | |
50c2f753 | 1318 | vol->nocase = 1; |
8830d7e0 SP |
1319 | break; |
1320 | case Opt_brl: | |
c46fa8ac | 1321 | vol->nobrl = 0; |
8830d7e0 SP |
1322 | break; |
1323 | case Opt_nobrl: | |
c46fa8ac | 1324 | vol->nobrl = 1; |
5cfdddcf PS |
1325 | /* |
1326 | * turn off mandatory locking in mode | |
8830d7e0 | 1327 | * if remote locking is turned off since the |
5cfdddcf PS |
1328 | * local vfs will do advisory |
1329 | */ | |
50c2f753 SF |
1330 | if (vol->file_mode == |
1331 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1332 | vol->file_mode = S_IALLUGO; |
8830d7e0 SP |
1333 | break; |
1334 | case Opt_forcemandatorylock: | |
13a6e42a | 1335 | vol->mand_lock = 1; |
8830d7e0 SP |
1336 | break; |
1337 | case Opt_setuids: | |
1da177e4 | 1338 | vol->setuids = 1; |
8830d7e0 SP |
1339 | break; |
1340 | case Opt_nosetuids: | |
1da177e4 | 1341 | vol->setuids = 0; |
8830d7e0 SP |
1342 | break; |
1343 | case Opt_dynperm: | |
d0a9c078 | 1344 | vol->dynperm = true; |
8830d7e0 SP |
1345 | break; |
1346 | case Opt_nodynperm: | |
d0a9c078 | 1347 | vol->dynperm = false; |
8830d7e0 SP |
1348 | break; |
1349 | case Opt_nohard: | |
1da177e4 | 1350 | vol->retry = 0; |
8830d7e0 SP |
1351 | break; |
1352 | case Opt_nosoft: | |
1da177e4 | 1353 | vol->retry = 1; |
8830d7e0 SP |
1354 | break; |
1355 | case Opt_nointr: | |
1da177e4 | 1356 | vol->intr = 0; |
8830d7e0 SP |
1357 | break; |
1358 | case Opt_intr: | |
1da177e4 | 1359 | vol->intr = 1; |
8830d7e0 SP |
1360 | break; |
1361 | case Opt_nostrictsync: | |
be652445 | 1362 | vol->nostrictsync = 1; |
8830d7e0 SP |
1363 | break; |
1364 | case Opt_strictsync: | |
be652445 | 1365 | vol->nostrictsync = 0; |
8830d7e0 SP |
1366 | break; |
1367 | case Opt_serverino: | |
1da177e4 | 1368 | vol->server_ino = 1; |
8830d7e0 SP |
1369 | break; |
1370 | case Opt_noserverino: | |
1da177e4 | 1371 | vol->server_ino = 0; |
8830d7e0 SP |
1372 | break; |
1373 | case Opt_rwpidforward: | |
d4ffff1f | 1374 | vol->rwpidforward = 1; |
8830d7e0 SP |
1375 | break; |
1376 | case Opt_cifsacl: | |
0a4b92c0 | 1377 | vol->cifs_acl = 1; |
8830d7e0 SP |
1378 | break; |
1379 | case Opt_nocifsacl: | |
0a4b92c0 | 1380 | vol->cifs_acl = 0; |
8830d7e0 SP |
1381 | break; |
1382 | case Opt_acl: | |
1da177e4 | 1383 | vol->no_psx_acl = 0; |
8830d7e0 SP |
1384 | break; |
1385 | case Opt_noacl: | |
1da177e4 | 1386 | vol->no_psx_acl = 1; |
8830d7e0 SP |
1387 | break; |
1388 | case Opt_locallease: | |
84210e91 | 1389 | vol->local_lease = 1; |
8830d7e0 SP |
1390 | break; |
1391 | case Opt_sign: | |
750d1151 | 1392 | vol->secFlg |= CIFSSEC_MUST_SIGN; |
8830d7e0 SP |
1393 | break; |
1394 | case Opt_seal: | |
95b1cb90 | 1395 | /* we do not do the following in secFlags because seal |
8830d7e0 SP |
1396 | * is a per tree connection (mount) not a per socket |
1397 | * or per-smb connection option in the protocol | |
1398 | * vol->secFlg |= CIFSSEC_MUST_SEAL; | |
1399 | */ | |
95b1cb90 | 1400 | vol->seal = 1; |
8830d7e0 | 1401 | break; |
8830d7e0 | 1402 | case Opt_noac: |
50c2f753 SF |
1403 | printk(KERN_WARNING "CIFS: Mount option noac not " |
1404 | "supported. Instead set " | |
1405 | "/proc/fs/cifs/LookupCacheEnabled to 0\n"); | |
8830d7e0 SP |
1406 | break; |
1407 | case Opt_fsc: | |
607a569d | 1408 | #ifndef CONFIG_CIFS_FSCACHE |
83fb086e | 1409 | cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE " |
607a569d | 1410 | "kernel config option set"); |
b946845a | 1411 | goto cifs_parse_mount_err; |
607a569d | 1412 | #endif |
fa1df75d | 1413 | vol->fsc = true; |
8830d7e0 SP |
1414 | break; |
1415 | case Opt_mfsymlinks: | |
736a3320 | 1416 | vol->mfsymlinks = true; |
8830d7e0 SP |
1417 | break; |
1418 | case Opt_multiuser: | |
0eb8a132 | 1419 | vol->multiuser = true; |
8830d7e0 | 1420 | break; |
d8162558 JL |
1421 | case Opt_sloppy: |
1422 | sloppy = true; | |
1423 | break; | |
8830d7e0 SP |
1424 | |
1425 | /* Numeric Values */ | |
1426 | case Opt_backupuid: | |
1427 | if (get_option_ul(args, &option)) { | |
3d3ea8e6 SP |
1428 | cERROR(1, "%s: Invalid backupuid value", |
1429 | __func__); | |
1430 | goto cifs_parse_mount_err; | |
1431 | } | |
8830d7e0 | 1432 | vol->backupuid = option; |
3d3ea8e6 | 1433 | vol->backupuid_specified = true; |
8830d7e0 SP |
1434 | break; |
1435 | case Opt_backupgid: | |
1436 | if (get_option_ul(args, &option)) { | |
3d3ea8e6 SP |
1437 | cERROR(1, "%s: Invalid backupgid value", |
1438 | __func__); | |
1439 | goto cifs_parse_mount_err; | |
1440 | } | |
8830d7e0 | 1441 | vol->backupgid = option; |
3d3ea8e6 | 1442 | vol->backupgid_specified = true; |
8830d7e0 SP |
1443 | break; |
1444 | case Opt_uid: | |
1445 | if (get_option_ul(args, &option)) { | |
1446 | cERROR(1, "%s: Invalid uid value", | |
1447 | __func__); | |
1448 | goto cifs_parse_mount_err; | |
1449 | } | |
1450 | vol->linux_uid = option; | |
1451 | uid_specified = true; | |
1452 | break; | |
1453 | case Opt_cruid: | |
1454 | if (get_option_ul(args, &option)) { | |
1455 | cERROR(1, "%s: Invalid cruid value", | |
1456 | __func__); | |
1457 | goto cifs_parse_mount_err; | |
1458 | } | |
1459 | vol->cred_uid = option; | |
1460 | break; | |
1461 | case Opt_gid: | |
1462 | if (get_option_ul(args, &option)) { | |
1463 | cERROR(1, "%s: Invalid gid value", | |
1464 | __func__); | |
1465 | goto cifs_parse_mount_err; | |
1466 | } | |
1467 | vol->linux_gid = option; | |
1468 | gid_specified = true; | |
1469 | break; | |
1470 | case Opt_file_mode: | |
1471 | if (get_option_ul(args, &option)) { | |
1472 | cERROR(1, "%s: Invalid file_mode value", | |
1473 | __func__); | |
1474 | goto cifs_parse_mount_err; | |
1475 | } | |
1476 | vol->file_mode = option; | |
1477 | break; | |
1478 | case Opt_dirmode: | |
1479 | if (get_option_ul(args, &option)) { | |
1480 | cERROR(1, "%s: Invalid dir_mode value", | |
1481 | __func__); | |
1482 | goto cifs_parse_mount_err; | |
1483 | } | |
1484 | vol->dir_mode = option; | |
1485 | break; | |
1486 | case Opt_port: | |
b979aaa1 JL |
1487 | if (get_option_ul(args, &option) || |
1488 | option > USHRT_MAX) { | |
1489 | cERROR(1, "%s: Invalid port value", __func__); | |
8830d7e0 SP |
1490 | goto cifs_parse_mount_err; |
1491 | } | |
b979aaa1 | 1492 | port = (unsigned short)option; |
8830d7e0 SP |
1493 | break; |
1494 | case Opt_rsize: | |
1495 | if (get_option_ul(args, &option)) { | |
1496 | cERROR(1, "%s: Invalid rsize value", | |
1497 | __func__); | |
b946845a | 1498 | goto cifs_parse_mount_err; |
8830d7e0 SP |
1499 | } |
1500 | vol->rsize = option; | |
1501 | break; | |
1502 | case Opt_wsize: | |
1503 | if (get_option_ul(args, &option)) { | |
1504 | cERROR(1, "%s: Invalid wsize value", | |
1505 | __func__); | |
1506 | goto cifs_parse_mount_err; | |
1507 | } | |
1508 | vol->wsize = option; | |
1509 | break; | |
1510 | case Opt_actimeo: | |
1511 | if (get_option_ul(args, &option)) { | |
1512 | cERROR(1, "%s: Invalid actimeo value", | |
1513 | __func__); | |
1514 | goto cifs_parse_mount_err; | |
1515 | } | |
1516 | vol->actimeo = HZ * option; | |
1517 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
1518 | cERROR(1, "CIFS: attribute cache" | |
1519 | "timeout too large"); | |
1520 | goto cifs_parse_mount_err; | |
1521 | } | |
1522 | break; | |
1523 | ||
1524 | /* String Arguments */ | |
1525 | ||
4fe9e963 SP |
1526 | case Opt_blank_user: |
1527 | /* null user, ie. anonymous authentication */ | |
1528 | vol->nullauth = 1; | |
1529 | vol->username = NULL; | |
1530 | break; | |
8830d7e0 SP |
1531 | case Opt_user: |
1532 | string = match_strdup(args); | |
1533 | if (string == NULL) | |
1534 | goto out_nomem; | |
1535 | ||
4fe9e963 | 1536 | if (strnlen(string, MAX_USERNAME_SIZE) > |
8830d7e0 SP |
1537 | MAX_USERNAME_SIZE) { |
1538 | printk(KERN_WARNING "CIFS: username too long\n"); | |
1539 | goto cifs_parse_mount_err; | |
1540 | } | |
1541 | vol->username = kstrdup(string, GFP_KERNEL); | |
1542 | if (!vol->username) { | |
1543 | printk(KERN_WARNING "CIFS: no memory " | |
1544 | "for username\n"); | |
1545 | goto cifs_parse_mount_err; | |
1546 | } | |
1547 | break; | |
1548 | case Opt_blank_pass: | |
1549 | vol->password = NULL; | |
1550 | break; | |
1551 | case Opt_pass: | |
1552 | /* passwords have to be handled differently | |
1553 | * to allow the character used for deliminator | |
1554 | * to be passed within them | |
1555 | */ | |
1556 | ||
1557 | /* Obtain the value string */ | |
1558 | value = strchr(data, '='); | |
10238074 | 1559 | value++; |
8830d7e0 SP |
1560 | |
1561 | /* Set tmp_end to end of the string */ | |
1562 | tmp_end = (char *) value + strlen(value); | |
1563 | ||
1564 | /* Check if following character is the deliminator | |
1565 | * If yes, we have encountered a double deliminator | |
1566 | * reset the NULL character to the deliminator | |
1567 | */ | |
e73f843a | 1568 | if (tmp_end < end && tmp_end[1] == delim) { |
8830d7e0 SP |
1569 | tmp_end[0] = delim; |
1570 | ||
e73f843a SJ |
1571 | /* Keep iterating until we get to a single |
1572 | * deliminator OR the end | |
1573 | */ | |
1574 | while ((tmp_end = strchr(tmp_end, delim)) | |
1575 | != NULL && (tmp_end[1] == delim)) { | |
1576 | tmp_end = (char *) &tmp_end[2]; | |
1577 | } | |
1578 | ||
1579 | /* Reset var options to point to next element */ | |
1580 | if (tmp_end) { | |
1581 | tmp_end[0] = '\0'; | |
1582 | options = (char *) &tmp_end[1]; | |
1583 | } else | |
1584 | /* Reached the end of the mount option | |
1585 | * string */ | |
1586 | options = end; | |
8830d7e0 SP |
1587 | } |
1588 | ||
8830d7e0 SP |
1589 | /* Now build new password string */ |
1590 | temp_len = strlen(value); | |
1591 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); | |
1592 | if (vol->password == NULL) { | |
1593 | printk(KERN_WARNING "CIFS: no memory " | |
1594 | "for password\n"); | |
1595 | goto cifs_parse_mount_err; | |
1596 | } | |
1597 | ||
1598 | for (i = 0, j = 0; i < temp_len; i++, j++) { | |
1599 | vol->password[j] = value[i]; | |
1600 | if ((value[i] == delim) && | |
1601 | value[i+1] == delim) | |
1602 | /* skip the second deliminator */ | |
1603 | i++; | |
1604 | } | |
1605 | vol->password[j] = '\0'; | |
1606 | break; | |
4fe9e963 | 1607 | case Opt_blank_ip: |
b979aaa1 JL |
1608 | /* FIXME: should this be an error instead? */ |
1609 | got_ip = false; | |
4fe9e963 | 1610 | break; |
8830d7e0 SP |
1611 | case Opt_ip: |
1612 | string = match_strdup(args); | |
1613 | if (string == NULL) | |
1614 | goto out_nomem; | |
1615 | ||
b979aaa1 JL |
1616 | if (!cifs_convert_address(dstaddr, string, |
1617 | strlen(string))) { | |
1618 | printk(KERN_ERR "CIFS: bad ip= option (%s).\n", | |
1619 | string); | |
8830d7e0 SP |
1620 | goto cifs_parse_mount_err; |
1621 | } | |
b979aaa1 | 1622 | got_ip = true; |
8830d7e0 SP |
1623 | break; |
1624 | case Opt_unc: | |
d387a5c5 | 1625 | string = vol->UNC; |
62a1a439 | 1626 | vol->UNC = match_strdup(args); |
8367224b | 1627 | if (vol->UNC == NULL) |
8830d7e0 SP |
1628 | goto out_nomem; |
1629 | ||
62a1a439 JL |
1630 | convert_delimiter(vol->UNC, '\\'); |
1631 | if (vol->UNC[0] != '\\' || vol->UNC[1] != '\\') { | |
d387a5c5 | 1632 | printk(KERN_ERR "CIFS: UNC Path does not " |
62a1a439 | 1633 | "begin with // or \\\\\n"); |
b946845a | 1634 | goto cifs_parse_mount_err; |
1da177e4 | 1635 | } |
8830d7e0 | 1636 | |
d387a5c5 JL |
1637 | /* Compare old unc= option to new one */ |
1638 | if (!string || strcmp(string, vol->UNC)) | |
1639 | printk(KERN_WARNING "CIFS: the value of the " | |
1640 | "unc= mount option does not match the " | |
1641 | "device string. Using the unc= option " | |
1642 | "for now. In 3.10, that option will " | |
1643 | "be ignored and the contents of the " | |
1644 | "device string will be used " | |
1645 | "instead. (%s != %s)\n", string, | |
1646 | vol->UNC); | |
8830d7e0 SP |
1647 | break; |
1648 | case Opt_domain: | |
1649 | string = match_strdup(args); | |
1650 | if (string == NULL) | |
1651 | goto out_nomem; | |
1652 | ||
4fe9e963 | 1653 | if (strnlen(string, 256) == 256) { |
8830d7e0 SP |
1654 | printk(KERN_WARNING "CIFS: domain name too" |
1655 | " long\n"); | |
1656 | goto cifs_parse_mount_err; | |
1657 | } | |
1658 | ||
1659 | vol->domainname = kstrdup(string, GFP_KERNEL); | |
1660 | if (!vol->domainname) { | |
1661 | printk(KERN_WARNING "CIFS: no memory " | |
1662 | "for domainname\n"); | |
1663 | goto cifs_parse_mount_err; | |
1664 | } | |
1665 | cFYI(1, "Domain name set"); | |
1666 | break; | |
1667 | case Opt_srcaddr: | |
1668 | string = match_strdup(args); | |
1669 | if (string == NULL) | |
1670 | goto out_nomem; | |
1671 | ||
4fe9e963 | 1672 | if (!cifs_convert_address( |
8830d7e0 SP |
1673 | (struct sockaddr *)&vol->srcaddr, |
1674 | string, strlen(string))) { | |
1675 | printk(KERN_WARNING "CIFS: Could not parse" | |
1676 | " srcaddr: %s\n", string); | |
1677 | goto cifs_parse_mount_err; | |
1678 | } | |
1679 | break; | |
1680 | case Opt_prefixpath: | |
839db3d1 JL |
1681 | /* skip over any leading delimiter */ |
1682 | if (*args[0].from == '/' || *args[0].from == '\\') | |
1683 | args[0].from++; | |
8830d7e0 | 1684 | |
d387a5c5 | 1685 | string = vol->prepath; |
839db3d1 | 1686 | vol->prepath = match_strdup(args); |
8367224b | 1687 | if (vol->prepath == NULL) |
839db3d1 | 1688 | goto out_nomem; |
d387a5c5 JL |
1689 | /* Compare old prefixpath= option to new one */ |
1690 | if (!string || strcmp(string, vol->prepath)) | |
1691 | printk(KERN_WARNING "CIFS: the value of the " | |
1692 | "prefixpath= mount option does not " | |
1693 | "match the device string. Using the " | |
1694 | "prefixpath= option for now. In 3.10, " | |
1695 | "that option will be ignored and the " | |
1696 | "contents of the device string will be " | |
1697 | "used instead.(%s != %s)\n", string, | |
1698 | vol->prepath); | |
8830d7e0 SP |
1699 | break; |
1700 | case Opt_iocharset: | |
1701 | string = match_strdup(args); | |
1702 | if (string == NULL) | |
1703 | goto out_nomem; | |
1704 | ||
4fe9e963 | 1705 | if (strnlen(string, 1024) >= 65) { |
8830d7e0 SP |
1706 | printk(KERN_WARNING "CIFS: iocharset name " |
1707 | "too long.\n"); | |
1708 | goto cifs_parse_mount_err; | |
1709 | } | |
1710 | ||
1711 | if (strnicmp(string, "default", 7) != 0) { | |
1712 | vol->iocharset = kstrdup(string, | |
1713 | GFP_KERNEL); | |
1714 | if (!vol->iocharset) { | |
1715 | printk(KERN_WARNING "CIFS: no memory" | |
1716 | "for charset\n"); | |
1717 | goto cifs_parse_mount_err; | |
1718 | } | |
1719 | } | |
1720 | /* if iocharset not set then load_nls_default | |
1721 | * is used by caller | |
1722 | */ | |
1723 | cFYI(1, "iocharset set to %s", string); | |
1724 | break; | |
1725 | case Opt_sockopt: | |
1726 | string = match_strdup(args); | |
1727 | if (string == NULL) | |
1728 | goto out_nomem; | |
1729 | ||
67c1f529 JL |
1730 | if (strnicmp(string, "TCP_NODELAY", 11) == 0) { |
1731 | printk(KERN_WARNING "CIFS: the " | |
1732 | "sockopt=TCP_NODELAY option has been " | |
1733 | "deprecated and will be removed " | |
1734 | "in 3.9\n"); | |
8830d7e0 | 1735 | vol->sockopt_tcp_nodelay = 1; |
67c1f529 | 1736 | } |
8830d7e0 SP |
1737 | break; |
1738 | case Opt_netbiosname: | |
1739 | string = match_strdup(args); | |
1740 | if (string == NULL) | |
1741 | goto out_nomem; | |
1742 | ||
8830d7e0 SP |
1743 | memset(vol->source_rfc1001_name, 0x20, |
1744 | RFC1001_NAME_LEN); | |
1745 | /* | |
1746 | * FIXME: are there cases in which a comma can | |
1747 | * be valid in workstation netbios name (and | |
1748 | * need special handling)? | |
1749 | */ | |
1750 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
1751 | /* don't ucase netbiosname for user */ | |
1752 | if (string[i] == 0) | |
1753 | break; | |
1754 | vol->source_rfc1001_name[i] = string[i]; | |
1755 | } | |
1756 | /* The string has 16th byte zero still from | |
1757 | * set at top of the function | |
1758 | */ | |
1759 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
1760 | printk(KERN_WARNING "CIFS: netbiosname" | |
1761 | " longer than 15 truncated.\n"); | |
1762 | ||
1763 | break; | |
1764 | case Opt_servern: | |
1765 | /* servernetbiosname specified override *SMBSERVER */ | |
1766 | string = match_strdup(args); | |
1767 | if (string == NULL) | |
1768 | goto out_nomem; | |
1769 | ||
8830d7e0 SP |
1770 | /* last byte, type, is 0x20 for servr type */ |
1771 | memset(vol->target_rfc1001_name, 0x20, | |
1772 | RFC1001_NAME_LEN_WITH_NULL); | |
1773 | ||
1774 | /* BB are there cases in which a comma can be | |
1775 | valid in this workstation netbios name | |
1776 | (and need special handling)? */ | |
1777 | ||
1778 | /* user or mount helper must uppercase the | |
1779 | netbios name */ | |
1780 | for (i = 0; i < 15; i++) { | |
1781 | if (string[i] == 0) | |
1782 | break; | |
1783 | vol->target_rfc1001_name[i] = string[i]; | |
1784 | } | |
1785 | /* The string has 16th byte zero still from | |
1786 | set at top of the function */ | |
1787 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
1788 | printk(KERN_WARNING "CIFS: server net" | |
1789 | "biosname longer than 15 truncated.\n"); | |
1790 | break; | |
1791 | case Opt_ver: | |
1792 | string = match_strdup(args); | |
1793 | if (string == NULL) | |
1794 | goto out_nomem; | |
1795 | ||
5249af32 | 1796 | if (strnicmp(string, "1", 1) == 0) { |
8830d7e0 SP |
1797 | /* This is the default */ |
1798 | break; | |
1799 | } | |
1800 | /* For all other value, error */ | |
1801 | printk(KERN_WARNING "CIFS: Invalid version" | |
1802 | " specified\n"); | |
b946845a | 1803 | goto cifs_parse_mount_err; |
23db65f5 JL |
1804 | case Opt_vers: |
1805 | string = match_strdup(args); | |
1806 | if (string == NULL) | |
1807 | goto out_nomem; | |
1808 | ||
1809 | if (cifs_parse_smb_version(string, vol) != 0) | |
1810 | goto cifs_parse_mount_err; | |
1811 | break; | |
8830d7e0 SP |
1812 | case Opt_sec: |
1813 | string = match_strdup(args); | |
1814 | if (string == NULL) | |
1815 | goto out_nomem; | |
1816 | ||
8830d7e0 SP |
1817 | if (cifs_parse_security_flavors(string, vol) != 0) |
1818 | goto cifs_parse_mount_err; | |
1819 | break; | |
15b6a473 JL |
1820 | case Opt_cache: |
1821 | string = match_strdup(args); | |
1822 | if (string == NULL) | |
1823 | goto out_nomem; | |
1824 | ||
1825 | if (cifs_parse_cache_flavor(string, vol) != 0) | |
1826 | goto cifs_parse_mount_err; | |
1827 | break; | |
8830d7e0 | 1828 | default: |
d8162558 JL |
1829 | /* |
1830 | * An option we don't recognize. Save it off for later | |
1831 | * if we haven't already found one | |
1832 | */ | |
1833 | if (!invalid) | |
1834 | invalid = data; | |
8830d7e0 | 1835 | break; |
1da177e4 | 1836 | } |
8830d7e0 SP |
1837 | /* Free up any allocated string */ |
1838 | kfree(string); | |
1839 | string = NULL; | |
1da177e4 | 1840 | } |
0eb8a132 | 1841 | |
d8162558 JL |
1842 | if (!sloppy && invalid) { |
1843 | printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid); | |
1844 | goto cifs_parse_mount_err; | |
1845 | } | |
1846 | ||
8a8798a5 JL |
1847 | #ifndef CONFIG_KEYS |
1848 | /* Muliuser mounts require CONFIG_KEYS support */ | |
1849 | if (vol->multiuser) { | |
1850 | cERROR(1, "Multiuser mounts require kernels with " | |
1851 | "CONFIG_KEYS enabled."); | |
b946845a | 1852 | goto cifs_parse_mount_err; |
0eb8a132 | 1853 | } |
8a8798a5 | 1854 | #endif |
e5e69abd | 1855 | if (!vol->UNC) { |
d387a5c5 JL |
1856 | cERROR(1, "CIFS mount error: No usable UNC path provided in " |
1857 | "device string or in unc= option!"); | |
e5e69abd JL |
1858 | goto cifs_parse_mount_err; |
1859 | } | |
0eb8a132 | 1860 | |
62a1a439 JL |
1861 | /* make sure UNC has a share name */ |
1862 | if (!strchr(vol->UNC + 3, '\\')) { | |
1863 | cERROR(1, "Malformed UNC. Unable to find share name."); | |
1864 | goto cifs_parse_mount_err; | |
1865 | } | |
1866 | ||
b979aaa1 JL |
1867 | if (!got_ip) { |
1868 | /* No ip= option specified? Try to get it from UNC */ | |
1869 | if (!cifs_convert_address(dstaddr, &vol->UNC[2], | |
1870 | strlen(&vol->UNC[2]))) { | |
1871 | printk(KERN_ERR "Unable to determine destination " | |
1872 | "address.\n"); | |
1873 | goto cifs_parse_mount_err; | |
1874 | } | |
1875 | } | |
1876 | ||
1877 | /* set the port that we got earlier */ | |
1878 | cifs_set_port(dstaddr, port); | |
1da177e4 | 1879 | |
9b9d6b24 JL |
1880 | if (uid_specified) |
1881 | vol->override_uid = override_uid; | |
1882 | else if (override_uid == 1) | |
1883 | printk(KERN_NOTICE "CIFS: ignoring forceuid mount option " | |
1884 | "specified with no uid= option.\n"); | |
1885 | ||
1886 | if (gid_specified) | |
1887 | vol->override_gid = override_gid; | |
1888 | else if (override_gid == 1) | |
1889 | printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " | |
1890 | "specified with no gid= option.\n"); | |
1891 | ||
b946845a | 1892 | kfree(mountdata_copy); |
1da177e4 | 1893 | return 0; |
b946845a | 1894 | |
8830d7e0 SP |
1895 | out_nomem: |
1896 | printk(KERN_WARNING "Could not allocate temporary buffer\n"); | |
b946845a | 1897 | cifs_parse_mount_err: |
8830d7e0 | 1898 | kfree(string); |
b946845a SF |
1899 | kfree(mountdata_copy); |
1900 | return 1; | |
1da177e4 LT |
1901 | } |
1902 | ||
3eb9a889 BG |
1903 | /** Returns true if srcaddr isn't specified and rhs isn't |
1904 | * specified, or if srcaddr is specified and | |
1905 | * matches the IP address of the rhs argument. | |
1906 | */ | |
1907 | static bool | |
1908 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
1909 | { | |
1910 | switch (srcaddr->sa_family) { | |
1911 | case AF_UNSPEC: | |
1912 | return (rhs->sa_family == AF_UNSPEC); | |
1913 | case AF_INET: { | |
1914 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
1915 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
1916 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
1917 | } | |
1918 | case AF_INET6: { | |
1919 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
1920 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs; | |
1921 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); | |
1922 | } | |
1923 | default: | |
1924 | WARN_ON(1); | |
1925 | return false; /* don't expect to be here */ | |
1926 | } | |
1927 | } | |
1928 | ||
4b886136 PS |
1929 | /* |
1930 | * If no port is specified in addr structure, we try to match with 445 port | |
1931 | * and if it fails - with 139 ports. It should be called only if address | |
1932 | * families of server and addr are equal. | |
1933 | */ | |
1934 | static bool | |
1935 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
1936 | { | |
6da97910 | 1937 | __be16 port, *sport; |
4b886136 PS |
1938 | |
1939 | switch (addr->sa_family) { | |
1940 | case AF_INET: | |
1941 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
1942 | port = ((struct sockaddr_in *) addr)->sin_port; | |
1943 | break; | |
1944 | case AF_INET6: | |
1945 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
1946 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
1947 | break; | |
1948 | default: | |
1949 | WARN_ON(1); | |
1950 | return false; | |
1951 | } | |
1952 | ||
1953 | if (!port) { | |
1954 | port = htons(CIFS_PORT); | |
1955 | if (port == *sport) | |
1956 | return true; | |
1957 | ||
1958 | port = htons(RFC1001_PORT); | |
1959 | } | |
1960 | ||
1961 | return port == *sport; | |
1962 | } | |
3eb9a889 | 1963 | |
4515148e | 1964 | static bool |
3eb9a889 BG |
1965 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
1966 | struct sockaddr *srcaddr) | |
4515148e | 1967 | { |
4515148e | 1968 | switch (addr->sa_family) { |
a9f1b85e PS |
1969 | case AF_INET: { |
1970 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
1971 | struct sockaddr_in *srv_addr4 = | |
1972 | (struct sockaddr_in *)&server->dstaddr; | |
1973 | ||
1974 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 1975 | return false; |
4515148e | 1976 | break; |
a9f1b85e PS |
1977 | } |
1978 | case AF_INET6: { | |
1979 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
1980 | struct sockaddr_in6 *srv_addr6 = | |
1981 | (struct sockaddr_in6 *)&server->dstaddr; | |
1982 | ||
4515148e | 1983 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 1984 | &srv_addr6->sin6_addr)) |
4515148e | 1985 | return false; |
a9f1b85e | 1986 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 1987 | return false; |
4515148e JL |
1988 | break; |
1989 | } | |
a9f1b85e PS |
1990 | default: |
1991 | WARN_ON(1); | |
1992 | return false; /* don't expect to be here */ | |
1993 | } | |
4515148e | 1994 | |
3eb9a889 BG |
1995 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
1996 | return false; | |
1997 | ||
4515148e JL |
1998 | return true; |
1999 | } | |
2000 | ||
daf5b0b6 JL |
2001 | static bool |
2002 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
2003 | { | |
2004 | unsigned int secFlags; | |
2005 | ||
2006 | if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
2007 | secFlags = vol->secFlg; | |
2008 | else | |
2009 | secFlags = global_secflags | vol->secFlg; | |
2010 | ||
2011 | switch (server->secType) { | |
2012 | case LANMAN: | |
2013 | if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT))) | |
2014 | return false; | |
2015 | break; | |
2016 | case NTLMv2: | |
2017 | if (!(secFlags & CIFSSEC_MAY_NTLMV2)) | |
2018 | return false; | |
2019 | break; | |
2020 | case NTLM: | |
2021 | if (!(secFlags & CIFSSEC_MAY_NTLM)) | |
2022 | return false; | |
2023 | break; | |
2024 | case Kerberos: | |
2025 | if (!(secFlags & CIFSSEC_MAY_KRB5)) | |
2026 | return false; | |
2027 | break; | |
2028 | case RawNTLMSSP: | |
2029 | if (!(secFlags & CIFSSEC_MAY_NTLMSSP)) | |
2030 | return false; | |
2031 | break; | |
2032 | default: | |
2033 | /* shouldn't happen */ | |
2034 | return false; | |
2035 | } | |
2036 | ||
25985edc | 2037 | /* now check if signing mode is acceptable */ |
daf5b0b6 | 2038 | if ((secFlags & CIFSSEC_MAY_SIGN) == 0 && |
96daf2b0 | 2039 | (server->sec_mode & SECMODE_SIGN_REQUIRED)) |
daf5b0b6 JL |
2040 | return false; |
2041 | else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) && | |
96daf2b0 | 2042 | (server->sec_mode & |
daf5b0b6 JL |
2043 | (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0) |
2044 | return false; | |
2045 | ||
2046 | return true; | |
2047 | } | |
2048 | ||
9fa114f7 | 2049 | static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol) |
37bb04e5 | 2050 | { |
9fa114f7 JL |
2051 | struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr; |
2052 | ||
23db65f5 JL |
2053 | if ((server->vals != vol->vals) || (server->ops != vol->ops)) |
2054 | return 0; | |
2055 | ||
37bb04e5 PS |
2056 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) |
2057 | return 0; | |
2058 | ||
2059 | if (!match_address(server, addr, | |
2060 | (struct sockaddr *)&vol->srcaddr)) | |
2061 | return 0; | |
2062 | ||
2063 | if (!match_port(server, addr)) | |
2064 | return 0; | |
2065 | ||
2066 | if (!match_security(server, vol)) | |
2067 | return 0; | |
2068 | ||
2069 | return 1; | |
2070 | } | |
2071 | ||
e7ddee90 | 2072 | static struct TCP_Server_Info * |
9fa114f7 | 2073 | cifs_find_tcp_session(struct smb_vol *vol) |
1da177e4 | 2074 | { |
e7ddee90 | 2075 | struct TCP_Server_Info *server; |
e7ddee90 | 2076 | |
3f9bcca7 | 2077 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 2078 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
9fa114f7 | 2079 | if (!match_server(server, vol)) |
daf5b0b6 JL |
2080 | continue; |
2081 | ||
e7ddee90 | 2082 | ++server->srv_count; |
3f9bcca7 | 2083 | spin_unlock(&cifs_tcp_ses_lock); |
b6b38f70 | 2084 | cFYI(1, "Existing tcp session with server found"); |
e7ddee90 | 2085 | return server; |
1da177e4 | 2086 | } |
3f9bcca7 | 2087 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2088 | return NULL; |
2089 | } | |
1b20d672 | 2090 | |
14fbf50d | 2091 | static void |
e7ddee90 | 2092 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
1da177e4 | 2093 | { |
e7ddee90 | 2094 | struct task_struct *task; |
1b20d672 | 2095 | |
3f9bcca7 | 2096 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 2097 | if (--server->srv_count > 0) { |
3f9bcca7 | 2098 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 2099 | return; |
1da177e4 | 2100 | } |
1b20d672 | 2101 | |
f1d0c998 RL |
2102 | put_net(cifs_net_ns(server)); |
2103 | ||
e7ddee90 | 2104 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 2105 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2106 | |
c74093b6 JL |
2107 | cancel_delayed_work_sync(&server->echo); |
2108 | ||
e7ddee90 JL |
2109 | spin_lock(&GlobalMid_Lock); |
2110 | server->tcpStatus = CifsExiting; | |
2111 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 2112 | |
d2b91521 | 2113 | cifs_crypto_shash_release(server); |
488f1d2d SJ |
2114 | cifs_fscache_release_client_cookie(server); |
2115 | ||
21e73393 SP |
2116 | kfree(server->session_key.response); |
2117 | server->session_key.response = NULL; | |
2118 | server->session_key.len = 0; | |
2119 | ||
e7ddee90 JL |
2120 | task = xchg(&server->tsk, NULL); |
2121 | if (task) | |
2122 | force_sig(SIGKILL, task); | |
1da177e4 LT |
2123 | } |
2124 | ||
63c038c2 JL |
2125 | static struct TCP_Server_Info * |
2126 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
2127 | { | |
2128 | struct TCP_Server_Info *tcp_ses = NULL; | |
63c038c2 JL |
2129 | int rc; |
2130 | ||
b979aaa1 | 2131 | cFYI(1, "UNC: %s", volume_info->UNC); |
63c038c2 JL |
2132 | |
2133 | /* see if we already have a matching tcp_ses */ | |
9fa114f7 | 2134 | tcp_ses = cifs_find_tcp_session(volume_info); |
63c038c2 JL |
2135 | if (tcp_ses) |
2136 | return tcp_ses; | |
2137 | ||
2138 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
2139 | if (!tcp_ses) { | |
2140 | rc = -ENOMEM; | |
2141 | goto out_err; | |
2142 | } | |
2143 | ||
d2b91521 SP |
2144 | rc = cifs_crypto_shash_allocate(tcp_ses); |
2145 | if (rc) { | |
2146 | cERROR(1, "could not setup hash structures rc %d", rc); | |
2147 | goto out_err; | |
2148 | } | |
2149 | ||
23db65f5 JL |
2150 | tcp_ses->ops = volume_info->ops; |
2151 | tcp_ses->vals = volume_info->vals; | |
f1d0c998 | 2152 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
2153 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
2154 | if (IS_ERR(tcp_ses->hostname)) { | |
2155 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 2156 | goto out_err_crypto_release; |
63c038c2 JL |
2157 | } |
2158 | ||
2159 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
2160 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 2161 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
fc40f9cf | 2162 | tcp_ses->in_flight = 0; |
2d86dbc9 | 2163 | tcp_ses->credits = 1; |
63c038c2 JL |
2164 | init_waitqueue_head(&tcp_ses->response_q); |
2165 | init_waitqueue_head(&tcp_ses->request_q); | |
2166 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
2167 | mutex_init(&tcp_ses->srv_mutex); | |
2168 | memcpy(tcp_ses->workstation_RFC1001_name, | |
2169 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
2170 | memcpy(tcp_ses->server_RFC1001_name, | |
2171 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 2172 | tcp_ses->session_estab = false; |
63c038c2 | 2173 | tcp_ses->sequence_number = 0; |
fda35943 | 2174 | tcp_ses->lstrp = jiffies; |
58fa015f | 2175 | spin_lock_init(&tcp_ses->req_lock); |
63c038c2 JL |
2176 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
2177 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 2178 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
9fa114f7 JL |
2179 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
2180 | sizeof(tcp_ses->srcaddr)); | |
2181 | memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr, | |
2182 | sizeof(tcp_ses->dstaddr)); | |
63c038c2 JL |
2183 | /* |
2184 | * at this point we are the only ones with the pointer | |
2185 | * to the struct since the kernel thread not created yet | |
2186 | * no need to spinlock this init of tcpStatus or srv_count | |
2187 | */ | |
2188 | tcp_ses->tcpStatus = CifsNew; | |
2189 | ++tcp_ses->srv_count; | |
2190 | ||
a9f1b85e | 2191 | rc = ip_connect(tcp_ses); |
63c038c2 | 2192 | if (rc < 0) { |
b6b38f70 | 2193 | cERROR(1, "Error connecting to socket. Aborting operation"); |
f7c5445a | 2194 | goto out_err_crypto_release; |
63c038c2 JL |
2195 | } |
2196 | ||
2197 | /* | |
2198 | * since we're in a cifs function already, we know that | |
2199 | * this will succeed. No need for try_module_get(). | |
2200 | */ | |
2201 | __module_get(THIS_MODULE); | |
7c97c200 | 2202 | tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, |
63c038c2 JL |
2203 | tcp_ses, "cifsd"); |
2204 | if (IS_ERR(tcp_ses->tsk)) { | |
2205 | rc = PTR_ERR(tcp_ses->tsk); | |
b6b38f70 | 2206 | cERROR(1, "error %d create cifsd thread", rc); |
63c038c2 | 2207 | module_put(THIS_MODULE); |
f7c5445a | 2208 | goto out_err_crypto_release; |
63c038c2 | 2209 | } |
fd88ce93 | 2210 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
63c038c2 JL |
2211 | |
2212 | /* thread spawned, put it on the list */ | |
3f9bcca7 | 2213 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 2214 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 2215 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 2216 | |
488f1d2d SJ |
2217 | cifs_fscache_get_client_cookie(tcp_ses); |
2218 | ||
c74093b6 | 2219 | /* queue echo request delayed work */ |
da472fc8 | 2220 | queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL); |
c74093b6 | 2221 | |
63c038c2 JL |
2222 | return tcp_ses; |
2223 | ||
f7c5445a | 2224 | out_err_crypto_release: |
d2b91521 SP |
2225 | cifs_crypto_shash_release(tcp_ses); |
2226 | ||
f1d0c998 RL |
2227 | put_net(cifs_net_ns(tcp_ses)); |
2228 | ||
63c038c2 JL |
2229 | out_err: |
2230 | if (tcp_ses) { | |
8347a5cd SF |
2231 | if (!IS_ERR(tcp_ses->hostname)) |
2232 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
2233 | if (tcp_ses->ssocket) |
2234 | sock_release(tcp_ses->ssocket); | |
2235 | kfree(tcp_ses); | |
2236 | } | |
2237 | return ERR_PTR(rc); | |
2238 | } | |
2239 | ||
96daf2b0 | 2240 | static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
37bb04e5 PS |
2241 | { |
2242 | switch (ses->server->secType) { | |
2243 | case Kerberos: | |
2244 | if (vol->cred_uid != ses->cred_uid) | |
2245 | return 0; | |
2246 | break; | |
2247 | default: | |
04febabc JL |
2248 | /* NULL username means anonymous session */ |
2249 | if (ses->user_name == NULL) { | |
2250 | if (!vol->nullauth) | |
2251 | return 0; | |
2252 | break; | |
2253 | } | |
2254 | ||
37bb04e5 | 2255 | /* anything else takes username/password */ |
04febabc JL |
2256 | if (strncmp(ses->user_name, |
2257 | vol->username ? vol->username : "", | |
37bb04e5 PS |
2258 | MAX_USERNAME_SIZE)) |
2259 | return 0; | |
2260 | if (strlen(vol->username) != 0 && | |
2261 | ses->password != NULL && | |
2262 | strncmp(ses->password, | |
2263 | vol->password ? vol->password : "", | |
2264 | MAX_PASSWORD_SIZE)) | |
2265 | return 0; | |
2266 | } | |
2267 | return 1; | |
2268 | } | |
2269 | ||
96daf2b0 | 2270 | static struct cifs_ses * |
4ff67b72 | 2271 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 2272 | { |
96daf2b0 | 2273 | struct cifs_ses *ses; |
dea570e0 | 2274 | |
3f9bcca7 | 2275 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 | 2276 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
37bb04e5 PS |
2277 | if (!match_session(ses, vol)) |
2278 | continue; | |
14fbf50d | 2279 | ++ses->ses_count; |
3f9bcca7 | 2280 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2281 | return ses; |
2282 | } | |
3f9bcca7 | 2283 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2284 | return NULL; |
2285 | } | |
dea570e0 | 2286 | |
14fbf50d | 2287 | static void |
96daf2b0 | 2288 | cifs_put_smb_ses(struct cifs_ses *ses) |
14fbf50d | 2289 | { |
58c45c58 | 2290 | unsigned int xid; |
14fbf50d | 2291 | struct TCP_Server_Info *server = ses->server; |
dea570e0 | 2292 | |
ac3aa2f8 | 2293 | cFYI(1, "%s: ses_count=%d", __func__, ses->ses_count); |
3f9bcca7 | 2294 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 2295 | if (--ses->ses_count > 0) { |
3f9bcca7 | 2296 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2297 | return; |
2298 | } | |
dea570e0 | 2299 | |
14fbf50d | 2300 | list_del_init(&ses->smb_ses_list); |
3f9bcca7 | 2301 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2302 | |
58c45c58 | 2303 | if (ses->status == CifsGood && server->ops->logoff) { |
6d5786a3 | 2304 | xid = get_xid(); |
58c45c58 | 2305 | server->ops->logoff(xid, ses); |
6d5786a3 | 2306 | _free_xid(xid); |
14fbf50d JL |
2307 | } |
2308 | sesInfoFree(ses); | |
2309 | cifs_put_tcp_session(server); | |
2310 | } | |
dea570e0 | 2311 | |
8a8798a5 JL |
2312 | #ifdef CONFIG_KEYS |
2313 | ||
2314 | /* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */ | |
2315 | #define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1) | |
2316 | ||
2317 | /* Populate username and pw fields from keyring if possible */ | |
2318 | static int | |
2319 | cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) | |
2320 | { | |
2321 | int rc = 0; | |
2322 | char *desc, *delim, *payload; | |
2323 | ssize_t len; | |
2324 | struct key *key; | |
2325 | struct TCP_Server_Info *server = ses->server; | |
2326 | struct sockaddr_in *sa; | |
2327 | struct sockaddr_in6 *sa6; | |
2328 | struct user_key_payload *upayload; | |
2329 | ||
2330 | desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL); | |
2331 | if (!desc) | |
2332 | return -ENOMEM; | |
2333 | ||
2334 | /* try to find an address key first */ | |
2335 | switch (server->dstaddr.ss_family) { | |
2336 | case AF_INET: | |
2337 | sa = (struct sockaddr_in *)&server->dstaddr; | |
2338 | sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr); | |
2339 | break; | |
2340 | case AF_INET6: | |
2341 | sa6 = (struct sockaddr_in6 *)&server->dstaddr; | |
2342 | sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr); | |
2343 | break; | |
2344 | default: | |
2345 | cFYI(1, "Bad ss_family (%hu)", server->dstaddr.ss_family); | |
2346 | rc = -EINVAL; | |
2347 | goto out_err; | |
2348 | } | |
2349 | ||
2350 | cFYI(1, "%s: desc=%s", __func__, desc); | |
2351 | key = request_key(&key_type_logon, desc, ""); | |
2352 | if (IS_ERR(key)) { | |
2353 | if (!ses->domainName) { | |
2354 | cFYI(1, "domainName is NULL"); | |
2355 | rc = PTR_ERR(key); | |
2356 | goto out_err; | |
2357 | } | |
2358 | ||
2359 | /* didn't work, try to find a domain key */ | |
2360 | sprintf(desc, "cifs:d:%s", ses->domainName); | |
2361 | cFYI(1, "%s: desc=%s", __func__, desc); | |
2362 | key = request_key(&key_type_logon, desc, ""); | |
2363 | if (IS_ERR(key)) { | |
2364 | rc = PTR_ERR(key); | |
2365 | goto out_err; | |
2366 | } | |
2367 | } | |
2368 | ||
2369 | down_read(&key->sem); | |
2370 | upayload = key->payload.data; | |
2371 | if (IS_ERR_OR_NULL(upayload)) { | |
4edc53c1 | 2372 | rc = upayload ? PTR_ERR(upayload) : -EINVAL; |
8a8798a5 JL |
2373 | goto out_key_put; |
2374 | } | |
2375 | ||
2376 | /* find first : in payload */ | |
2377 | payload = (char *)upayload->data; | |
2378 | delim = strnchr(payload, upayload->datalen, ':'); | |
2379 | cFYI(1, "payload=%s", payload); | |
2380 | if (!delim) { | |
2381 | cFYI(1, "Unable to find ':' in payload (datalen=%d)", | |
2382 | upayload->datalen); | |
2383 | rc = -EINVAL; | |
2384 | goto out_key_put; | |
2385 | } | |
2386 | ||
2387 | len = delim - payload; | |
2388 | if (len > MAX_USERNAME_SIZE || len <= 0) { | |
000f9bb8 | 2389 | cFYI(1, "Bad value from username search (len=%zd)", len); |
8a8798a5 JL |
2390 | rc = -EINVAL; |
2391 | goto out_key_put; | |
2392 | } | |
2393 | ||
2394 | vol->username = kstrndup(payload, len, GFP_KERNEL); | |
2395 | if (!vol->username) { | |
000f9bb8 | 2396 | cFYI(1, "Unable to allocate %zd bytes for username", len); |
8a8798a5 JL |
2397 | rc = -ENOMEM; |
2398 | goto out_key_put; | |
2399 | } | |
2400 | cFYI(1, "%s: username=%s", __func__, vol->username); | |
2401 | ||
2402 | len = key->datalen - (len + 1); | |
2403 | if (len > MAX_PASSWORD_SIZE || len <= 0) { | |
000f9bb8 | 2404 | cFYI(1, "Bad len for password search (len=%zd)", len); |
8a8798a5 JL |
2405 | rc = -EINVAL; |
2406 | kfree(vol->username); | |
2407 | vol->username = NULL; | |
2408 | goto out_key_put; | |
2409 | } | |
2410 | ||
2411 | ++delim; | |
2412 | vol->password = kstrndup(delim, len, GFP_KERNEL); | |
2413 | if (!vol->password) { | |
000f9bb8 | 2414 | cFYI(1, "Unable to allocate %zd bytes for password", len); |
8a8798a5 JL |
2415 | rc = -ENOMEM; |
2416 | kfree(vol->username); | |
2417 | vol->username = NULL; | |
2418 | goto out_key_put; | |
2419 | } | |
2420 | ||
2421 | out_key_put: | |
2422 | up_read(&key->sem); | |
2423 | key_put(key); | |
2424 | out_err: | |
2425 | kfree(desc); | |
2426 | cFYI(1, "%s: returning %d", __func__, rc); | |
2427 | return rc; | |
2428 | } | |
2429 | #else /* ! CONFIG_KEYS */ | |
2430 | static inline int | |
2431 | cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), | |
2432 | struct cifs_ses *ses __attribute__((unused))) | |
2433 | { | |
2434 | return -ENOSYS; | |
2435 | } | |
2436 | #endif /* CONFIG_KEYS */ | |
2437 | ||
96daf2b0 | 2438 | static struct cifs_ses * |
36988c76 JL |
2439 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
2440 | { | |
286170aa PS |
2441 | int rc = -ENOMEM; |
2442 | unsigned int xid; | |
96daf2b0 | 2443 | struct cifs_ses *ses; |
a9f1b85e PS |
2444 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
2445 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 | 2446 | |
6d5786a3 | 2447 | xid = get_xid(); |
36988c76 | 2448 | |
4ff67b72 | 2449 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 JL |
2450 | if (ses) { |
2451 | cFYI(1, "Existing smb sess found (status=%d)", ses->status); | |
2452 | ||
36988c76 | 2453 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
2454 | rc = cifs_negotiate_protocol(xid, ses); |
2455 | if (rc) { | |
2456 | mutex_unlock(&ses->session_mutex); | |
2457 | /* problem -- put our ses reference */ | |
2458 | cifs_put_smb_ses(ses); | |
6d5786a3 | 2459 | free_xid(xid); |
198b5682 JL |
2460 | return ERR_PTR(rc); |
2461 | } | |
36988c76 JL |
2462 | if (ses->need_reconnect) { |
2463 | cFYI(1, "Session needs reconnect"); | |
2464 | rc = cifs_setup_session(xid, ses, | |
2465 | volume_info->local_nls); | |
2466 | if (rc) { | |
2467 | mutex_unlock(&ses->session_mutex); | |
2468 | /* problem -- put our reference */ | |
2469 | cifs_put_smb_ses(ses); | |
6d5786a3 | 2470 | free_xid(xid); |
36988c76 JL |
2471 | return ERR_PTR(rc); |
2472 | } | |
2473 | } | |
2474 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
2475 | |
2476 | /* existing SMB ses has a server reference already */ | |
2477 | cifs_put_tcp_session(server); | |
6d5786a3 | 2478 | free_xid(xid); |
36988c76 JL |
2479 | return ses; |
2480 | } | |
2481 | ||
2482 | cFYI(1, "Existing smb sess not found"); | |
2483 | ses = sesInfoAlloc(); | |
2484 | if (ses == NULL) | |
2485 | goto get_ses_fail; | |
2486 | ||
2487 | /* new SMB session uses our server ref */ | |
2488 | ses->server = server; | |
a9f1b85e PS |
2489 | if (server->dstaddr.ss_family == AF_INET6) |
2490 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 2491 | else |
a9f1b85e | 2492 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 2493 | |
8727c8a8 SF |
2494 | if (volume_info->username) { |
2495 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
2496 | if (!ses->user_name) | |
2497 | goto get_ses_fail; | |
2498 | } | |
36988c76 JL |
2499 | |
2500 | /* volume_info->password freed at unmount */ | |
2501 | if (volume_info->password) { | |
2502 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2503 | if (!ses->password) | |
2504 | goto get_ses_fail; | |
2505 | } | |
2506 | if (volume_info->domainname) { | |
d3686d54 SP |
2507 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
2508 | if (!ses->domainName) | |
2509 | goto get_ses_fail; | |
36988c76 | 2510 | } |
3e4b3e1f | 2511 | ses->cred_uid = volume_info->cred_uid; |
36988c76 | 2512 | ses->linux_uid = volume_info->linux_uid; |
d9b94201 | 2513 | |
36988c76 JL |
2514 | ses->overrideSecFlg = volume_info->secFlg; |
2515 | ||
2516 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
2517 | rc = cifs_negotiate_protocol(xid, ses); |
2518 | if (!rc) | |
2519 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 2520 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 2521 | if (rc) |
36988c76 JL |
2522 | goto get_ses_fail; |
2523 | ||
2524 | /* success, put it on the list */ | |
3f9bcca7 | 2525 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 2526 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 2527 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 | 2528 | |
6d5786a3 | 2529 | free_xid(xid); |
36988c76 JL |
2530 | return ses; |
2531 | ||
2532 | get_ses_fail: | |
2533 | sesInfoFree(ses); | |
6d5786a3 | 2534 | free_xid(xid); |
36988c76 JL |
2535 | return ERR_PTR(rc); |
2536 | } | |
2537 | ||
96daf2b0 | 2538 | static int match_tcon(struct cifs_tcon *tcon, const char *unc) |
37bb04e5 PS |
2539 | { |
2540 | if (tcon->tidStatus == CifsExiting) | |
2541 | return 0; | |
2542 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) | |
2543 | return 0; | |
2544 | return 1; | |
2545 | } | |
2546 | ||
96daf2b0 SF |
2547 | static struct cifs_tcon * |
2548 | cifs_find_tcon(struct cifs_ses *ses, const char *unc) | |
f1987b44 JL |
2549 | { |
2550 | struct list_head *tmp; | |
96daf2b0 | 2551 | struct cifs_tcon *tcon; |
f1987b44 | 2552 | |
3f9bcca7 | 2553 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2554 | list_for_each(tmp, &ses->tcon_list) { |
96daf2b0 | 2555 | tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
37bb04e5 | 2556 | if (!match_tcon(tcon, unc)) |
f1987b44 | 2557 | continue; |
f1987b44 | 2558 | ++tcon->tc_count; |
3f9bcca7 | 2559 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2560 | return tcon; |
1da177e4 | 2561 | } |
3f9bcca7 | 2562 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2563 | return NULL; |
2564 | } | |
2565 | ||
f1987b44 | 2566 | static void |
96daf2b0 | 2567 | cifs_put_tcon(struct cifs_tcon *tcon) |
f1987b44 | 2568 | { |
2e6e02ab | 2569 | unsigned int xid; |
96daf2b0 | 2570 | struct cifs_ses *ses = tcon->ses; |
f1987b44 | 2571 | |
ac3aa2f8 | 2572 | cFYI(1, "%s: tc_count=%d", __func__, tcon->tc_count); |
3f9bcca7 | 2573 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2574 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 2575 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2576 | return; |
2577 | } | |
2578 | ||
2579 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 2580 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 | 2581 | |
6d5786a3 | 2582 | xid = get_xid(); |
2e6e02ab PS |
2583 | if (ses->server->ops->tree_disconnect) |
2584 | ses->server->ops->tree_disconnect(xid, tcon); | |
6d5786a3 | 2585 | _free_xid(xid); |
f1987b44 | 2586 | |
d03382ce | 2587 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 2588 | tconInfoFree(tcon); |
f1987b44 JL |
2589 | cifs_put_smb_ses(ses); |
2590 | } | |
2591 | ||
96daf2b0 SF |
2592 | static struct cifs_tcon * |
2593 | cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) | |
d00c28de JL |
2594 | { |
2595 | int rc, xid; | |
96daf2b0 | 2596 | struct cifs_tcon *tcon; |
d00c28de JL |
2597 | |
2598 | tcon = cifs_find_tcon(ses, volume_info->UNC); | |
2599 | if (tcon) { | |
2600 | cFYI(1, "Found match on UNC path"); | |
2601 | /* existing tcon already has a reference */ | |
2602 | cifs_put_smb_ses(ses); | |
2603 | if (tcon->seal != volume_info->seal) | |
2604 | cERROR(1, "transport encryption setting " | |
2605 | "conflicts with existing tid"); | |
2606 | return tcon; | |
2607 | } | |
2608 | ||
2e6e02ab PS |
2609 | if (!ses->server->ops->tree_connect) { |
2610 | rc = -ENOSYS; | |
2611 | goto out_fail; | |
2612 | } | |
2613 | ||
d00c28de JL |
2614 | tcon = tconInfoAlloc(); |
2615 | if (tcon == NULL) { | |
2616 | rc = -ENOMEM; | |
2617 | goto out_fail; | |
2618 | } | |
2619 | ||
2620 | tcon->ses = ses; | |
2621 | if (volume_info->password) { | |
2622 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2623 | if (!tcon->password) { | |
2624 | rc = -ENOMEM; | |
2625 | goto out_fail; | |
2626 | } | |
2627 | } | |
2628 | ||
2e6e02ab PS |
2629 | /* |
2630 | * BB Do we need to wrap session_mutex around this TCon call and Unix | |
2631 | * SetFS as we do on SessSetup and reconnect? | |
2632 | */ | |
6d5786a3 | 2633 | xid = get_xid(); |
2e6e02ab PS |
2634 | rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon, |
2635 | volume_info->local_nls); | |
6d5786a3 | 2636 | free_xid(xid); |
2e6e02ab | 2637 | cFYI(1, "Tcon rc = %d", rc); |
d00c28de JL |
2638 | if (rc) |
2639 | goto out_fail; | |
2640 | ||
2641 | if (volume_info->nodfs) { | |
2642 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
2643 | cFYI(1, "DFS disabled (%d)", tcon->Flags); | |
2644 | } | |
2645 | tcon->seal = volume_info->seal; | |
2e6e02ab PS |
2646 | /* |
2647 | * We can have only one retry value for a connection to a share so for | |
2648 | * resources mounted more than once to the same server share the last | |
2649 | * value passed in for the retry flag is used. | |
2650 | */ | |
d00c28de JL |
2651 | tcon->retry = volume_info->retry; |
2652 | tcon->nocase = volume_info->nocase; | |
2653 | tcon->local_lease = volume_info->local_lease; | |
233839b1 | 2654 | INIT_LIST_HEAD(&tcon->pending_opens); |
d00c28de | 2655 | |
3f9bcca7 | 2656 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 2657 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 2658 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 2659 | |
d03382ce SJ |
2660 | cifs_fscache_get_super_cookie(tcon); |
2661 | ||
d00c28de JL |
2662 | return tcon; |
2663 | ||
2664 | out_fail: | |
2665 | tconInfoFree(tcon); | |
2666 | return ERR_PTR(rc); | |
2667 | } | |
2668 | ||
9d002df4 JL |
2669 | void |
2670 | cifs_put_tlink(struct tcon_link *tlink) | |
2671 | { | |
2672 | if (!tlink || IS_ERR(tlink)) | |
2673 | return; | |
2674 | ||
2675 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
2676 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
2677 | tlink->tl_time = jiffies; | |
2678 | return; | |
2679 | } | |
2680 | ||
2681 | if (!IS_ERR(tlink_tcon(tlink))) | |
2682 | cifs_put_tcon(tlink_tcon(tlink)); | |
2683 | kfree(tlink); | |
2684 | return; | |
2685 | } | |
d00c28de | 2686 | |
25c7f41e | 2687 | static inline struct tcon_link * |
cd51875d PS |
2688 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
2689 | { | |
2690 | return cifs_sb->master_tlink; | |
2691 | } | |
25c7f41e PS |
2692 | |
2693 | static int | |
2694 | compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
2695 | { | |
2696 | struct cifs_sb_info *old = CIFS_SB(sb); | |
2697 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
2698 | ||
2699 | if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) | |
2700 | return 0; | |
2701 | ||
2702 | if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) != | |
2703 | (new->mnt_cifs_flags & CIFS_MOUNT_MASK)) | |
2704 | return 0; | |
2705 | ||
25c7f41e | 2706 | /* |
5eba8ab3 JL |
2707 | * We want to share sb only if we don't specify an r/wsize or |
2708 | * specified r/wsize is greater than or equal to existing one. | |
25c7f41e PS |
2709 | */ |
2710 | if (new->wsize && new->wsize < old->wsize) | |
2711 | return 0; | |
2712 | ||
5eba8ab3 JL |
2713 | if (new->rsize && new->rsize < old->rsize) |
2714 | return 0; | |
2715 | ||
25c7f41e PS |
2716 | if (old->mnt_uid != new->mnt_uid || old->mnt_gid != new->mnt_gid) |
2717 | return 0; | |
2718 | ||
2719 | if (old->mnt_file_mode != new->mnt_file_mode || | |
2720 | old->mnt_dir_mode != new->mnt_dir_mode) | |
2721 | return 0; | |
2722 | ||
2723 | if (strcmp(old->local_nls->charset, new->local_nls->charset)) | |
2724 | return 0; | |
2725 | ||
2726 | if (old->actimeo != new->actimeo) | |
2727 | return 0; | |
2728 | ||
2729 | return 1; | |
2730 | } | |
2731 | ||
2732 | int | |
2733 | cifs_match_super(struct super_block *sb, void *data) | |
2734 | { | |
2735 | struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; | |
2736 | struct smb_vol *volume_info; | |
2737 | struct cifs_sb_info *cifs_sb; | |
2738 | struct TCP_Server_Info *tcp_srv; | |
96daf2b0 SF |
2739 | struct cifs_ses *ses; |
2740 | struct cifs_tcon *tcon; | |
25c7f41e | 2741 | struct tcon_link *tlink; |
25c7f41e PS |
2742 | int rc = 0; |
2743 | ||
25c7f41e PS |
2744 | spin_lock(&cifs_tcp_ses_lock); |
2745 | cifs_sb = CIFS_SB(sb); | |
2746 | tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
2747 | if (IS_ERR(tlink)) { | |
2748 | spin_unlock(&cifs_tcp_ses_lock); | |
2749 | return rc; | |
2750 | } | |
2751 | tcon = tlink_tcon(tlink); | |
2752 | ses = tcon->ses; | |
2753 | tcp_srv = ses->server; | |
2754 | ||
2755 | volume_info = mnt_data->vol; | |
2756 | ||
9fa114f7 | 2757 | if (!match_server(tcp_srv, volume_info) || |
25c7f41e PS |
2758 | !match_session(ses, volume_info) || |
2759 | !match_tcon(tcon, volume_info->UNC)) { | |
2760 | rc = 0; | |
2761 | goto out; | |
2762 | } | |
2763 | ||
2764 | rc = compare_mount_options(sb, mnt_data); | |
2765 | out: | |
25c7f41e | 2766 | spin_unlock(&cifs_tcp_ses_lock); |
f484b5d0 | 2767 | cifs_put_tlink(tlink); |
25c7f41e PS |
2768 | return rc; |
2769 | } | |
2770 | ||
1da177e4 | 2771 | int |
b669f33c | 2772 | get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path, |
2e6e02ab PS |
2773 | const struct nls_table *nls_codepage, unsigned int *num_referrals, |
2774 | struct dfs_info3_param **referrals, int remap) | |
1da177e4 LT |
2775 | { |
2776 | char *temp_unc; | |
2777 | int rc = 0; | |
2778 | ||
b669f33c | 2779 | if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer) |
2e6e02ab PS |
2780 | return -ENOSYS; |
2781 | ||
2782 | *num_referrals = 0; | |
2783 | *referrals = NULL; | |
1da177e4 | 2784 | |
2e6e02ab | 2785 | if (ses->ipc_tid == 0) { |
1da177e4 | 2786 | temp_unc = kmalloc(2 /* for slashes */ + |
2e6e02ab PS |
2787 | strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2) |
2788 | + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL); | |
1da177e4 LT |
2789 | if (temp_unc == NULL) |
2790 | return -ENOMEM; | |
2791 | temp_unc[0] = '\\'; | |
2792 | temp_unc[1] = '\\'; | |
2e6e02ab PS |
2793 | strcpy(temp_unc + 2, ses->serverName); |
2794 | strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$"); | |
2795 | rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL, | |
2796 | nls_codepage); | |
2797 | cFYI(1, "Tcon rc = %d ipc_tid = %d", rc, ses->ipc_tid); | |
1da177e4 LT |
2798 | kfree(temp_unc); |
2799 | } | |
2800 | if (rc == 0) | |
b669f33c PS |
2801 | rc = ses->server->ops->get_dfs_refer(xid, ses, old_path, |
2802 | referrals, num_referrals, | |
2803 | nls_codepage, remap); | |
2e6e02ab PS |
2804 | /* |
2805 | * BB - map targetUNCs to dfs_info3 structures, here or in | |
b669f33c | 2806 | * ses->server->ops->get_dfs_refer. |
2e6e02ab | 2807 | */ |
1da177e4 LT |
2808 | |
2809 | return rc; | |
2810 | } | |
2811 | ||
09e50d55 JL |
2812 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
2813 | static struct lock_class_key cifs_key[2]; | |
2814 | static struct lock_class_key cifs_slock_key[2]; | |
2815 | ||
2816 | static inline void | |
2817 | cifs_reclassify_socket4(struct socket *sock) | |
2818 | { | |
2819 | struct sock *sk = sock->sk; | |
2820 | BUG_ON(sock_owned_by_user(sk)); | |
2821 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", | |
2822 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
2823 | } | |
2824 | ||
2825 | static inline void | |
2826 | cifs_reclassify_socket6(struct socket *sock) | |
2827 | { | |
2828 | struct sock *sk = sock->sk; | |
2829 | BUG_ON(sock_owned_by_user(sk)); | |
2830 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", | |
2831 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
2832 | } | |
2833 | #else | |
2834 | static inline void | |
2835 | cifs_reclassify_socket4(struct socket *sock) | |
2836 | { | |
2837 | } | |
2838 | ||
2839 | static inline void | |
2840 | cifs_reclassify_socket6(struct socket *sock) | |
2841 | { | |
2842 | } | |
2843 | #endif | |
2844 | ||
1da177e4 | 2845 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 2846 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 2847 | { |
50c2f753 | 2848 | unsigned int i, j; |
1da177e4 | 2849 | |
50c2f753 | 2850 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
2851 | /* mask a nibble at a time and encode */ |
2852 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
2853 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 2854 | j += 2; |
1da177e4 LT |
2855 | } |
2856 | ||
2857 | } | |
2858 | ||
3eb9a889 BG |
2859 | static int |
2860 | bind_socket(struct TCP_Server_Info *server) | |
2861 | { | |
2862 | int rc = 0; | |
2863 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
2864 | /* Bind to the specified local IP address */ | |
2865 | struct socket *socket = server->ssocket; | |
2866 | rc = socket->ops->bind(socket, | |
2867 | (struct sockaddr *) &server->srcaddr, | |
2868 | sizeof(server->srcaddr)); | |
2869 | if (rc < 0) { | |
2870 | struct sockaddr_in *saddr4; | |
2871 | struct sockaddr_in6 *saddr6; | |
2872 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
2873 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
2874 | if (saddr6->sin6_family == AF_INET6) | |
2875 | cERROR(1, "cifs: " | |
ac3aa2f8 | 2876 | "Failed to bind to: %pI6c, error: %d", |
3eb9a889 BG |
2877 | &saddr6->sin6_addr, rc); |
2878 | else | |
2879 | cERROR(1, "cifs: " | |
ac3aa2f8 | 2880 | "Failed to bind to: %pI4, error: %d", |
3eb9a889 BG |
2881 | &saddr4->sin_addr.s_addr, rc); |
2882 | } | |
2883 | } | |
2884 | return rc; | |
2885 | } | |
1da177e4 LT |
2886 | |
2887 | static int | |
a9f1b85e | 2888 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
2889 | { |
2890 | int rc = 0; | |
a9f1b85e PS |
2891 | /* |
2892 | * some servers require RFC1001 sessinit before sending | |
2893 | * negprot - BB check reconnection in case where second | |
2894 | * sessinit is sent but no second negprot | |
2895 | */ | |
2896 | struct rfc1002_session_packet *ses_init_buf; | |
2897 | struct smb_hdr *smb_buf; | |
2898 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
2899 | GFP_KERNEL); | |
2900 | if (ses_init_buf) { | |
2901 | ses_init_buf->trailer.session_req.called_len = 32; | |
2902 | ||
2903 | if (server->server_RFC1001_name && | |
2904 | server->server_RFC1001_name[0] != 0) | |
2905 | rfc1002mangle(ses_init_buf->trailer. | |
2906 | session_req.called_name, | |
2907 | server->server_RFC1001_name, | |
2908 | RFC1001_NAME_LEN_WITH_NULL); | |
2909 | else | |
2910 | rfc1002mangle(ses_init_buf->trailer. | |
2911 | session_req.called_name, | |
2912 | DEFAULT_CIFS_CALLED_NAME, | |
2913 | RFC1001_NAME_LEN_WITH_NULL); | |
2914 | ||
2915 | ses_init_buf->trailer.session_req.calling_len = 32; | |
2916 | ||
2917 | /* | |
2918 | * calling name ends in null (byte 16) from old smb | |
2919 | * convention. | |
2920 | */ | |
2921 | if (server->workstation_RFC1001_name && | |
2922 | server->workstation_RFC1001_name[0] != 0) | |
2923 | rfc1002mangle(ses_init_buf->trailer. | |
2924 | session_req.calling_name, | |
2925 | server->workstation_RFC1001_name, | |
2926 | RFC1001_NAME_LEN_WITH_NULL); | |
2927 | else | |
2928 | rfc1002mangle(ses_init_buf->trailer. | |
2929 | session_req.calling_name, | |
2930 | "LINUX_CIFS_CLNT", | |
2931 | RFC1001_NAME_LEN_WITH_NULL); | |
2932 | ||
2933 | ses_init_buf->trailer.session_req.scope1 = 0; | |
2934 | ses_init_buf->trailer.session_req.scope2 = 0; | |
2935 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
2936 | ||
2937 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
be8e3b00 | 2938 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
a9f1b85e PS |
2939 | rc = smb_send(server, smb_buf, 0x44); |
2940 | kfree(ses_init_buf); | |
2941 | /* | |
2942 | * RFC1001 layer in at least one server | |
2943 | * requires very short break before negprot | |
2944 | * presumably because not expecting negprot | |
2945 | * to follow so fast. This is a simple | |
2946 | * solution that works without | |
2947 | * complicating the code and causes no | |
2948 | * significant slowing down on mount | |
2949 | * for everyone else | |
2950 | */ | |
2951 | usleep_range(1000, 2000); | |
2952 | } | |
2953 | /* | |
2954 | * else the negprot may still work without this | |
2955 | * even though malloc failed | |
2956 | */ | |
2957 | ||
2958 | return rc; | |
2959 | } | |
2960 | ||
2961 | static int | |
2962 | generic_ip_connect(struct TCP_Server_Info *server) | |
2963 | { | |
2964 | int rc = 0; | |
6da97910 | 2965 | __be16 sport; |
a9f1b85e | 2966 | int slen, sfamily; |
bcf4b106 | 2967 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
2968 | struct sockaddr *saddr; |
2969 | ||
2970 | saddr = (struct sockaddr *) &server->dstaddr; | |
2971 | ||
2972 | if (server->dstaddr.ss_family == AF_INET6) { | |
2973 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
2974 | slen = sizeof(struct sockaddr_in6); | |
2975 | sfamily = AF_INET6; | |
2976 | } else { | |
2977 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
2978 | slen = sizeof(struct sockaddr_in); | |
2979 | sfamily = AF_INET; | |
2980 | } | |
1da177e4 | 2981 | |
bcf4b106 | 2982 | if (socket == NULL) { |
f1d0c998 RL |
2983 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
2984 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 2985 | if (rc < 0) { |
b6b38f70 | 2986 | cERROR(1, "Error %d creating socket", rc); |
a9f1b85e | 2987 | server->ssocket = NULL; |
1da177e4 | 2988 | return rc; |
1da177e4 | 2989 | } |
bcf4b106 JL |
2990 | |
2991 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
b6b38f70 | 2992 | cFYI(1, "Socket created"); |
bcf4b106 JL |
2993 | server->ssocket = socket; |
2994 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
2995 | if (sfamily == AF_INET6) |
2996 | cifs_reclassify_socket6(socket); | |
2997 | else | |
2998 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
2999 | } |
3000 | ||
3eb9a889 BG |
3001 | rc = bind_socket(server); |
3002 | if (rc < 0) | |
3003 | return rc; | |
3004 | ||
bcf4b106 JL |
3005 | /* |
3006 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
3007 | * the default. sock_setsockopt not used because it expects |
3008 | * user space buffer | |
bcf4b106 JL |
3009 | */ |
3010 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 3011 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 3012 | |
b387eaeb | 3013 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
3014 | if (server->noautotune) { |
3015 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
3016 | socket->sk->sk_sndbuf = 200 * 1024; | |
3017 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
3018 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 3019 | } |
1da177e4 | 3020 | |
6a5fa236 | 3021 | if (server->tcp_nodelay) { |
a9f1b85e | 3022 | int val = 1; |
6a5fa236 SF |
3023 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
3024 | (char *)&val, sizeof(val)); | |
3025 | if (rc) | |
b6b38f70 | 3026 | cFYI(1, "set TCP_NODELAY socket option error %d", rc); |
6a5fa236 SF |
3027 | } |
3028 | ||
b6b38f70 | 3029 | cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx", |
bcf4b106 | 3030 | socket->sk->sk_sndbuf, |
b6b38f70 | 3031 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 3032 | |
ee1b3ea9 JL |
3033 | rc = socket->ops->connect(socket, saddr, slen, 0); |
3034 | if (rc < 0) { | |
3035 | cFYI(1, "Error %d connecting to server", rc); | |
3036 | sock_release(socket); | |
3037 | server->ssocket = NULL; | |
3038 | return rc; | |
3039 | } | |
3040 | ||
a9f1b85e PS |
3041 | if (sport == htons(RFC1001_PORT)) |
3042 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 3043 | |
1da177e4 LT |
3044 | return rc; |
3045 | } | |
3046 | ||
3047 | static int | |
a9f1b85e | 3048 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 3049 | { |
6da97910 | 3050 | __be16 *sport; |
a9f1b85e PS |
3051 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
3052 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 3053 | |
a9f1b85e PS |
3054 | if (server->dstaddr.ss_family == AF_INET6) |
3055 | sport = &addr6->sin6_port; | |
3056 | else | |
3057 | sport = &addr->sin_port; | |
1da177e4 | 3058 | |
a9f1b85e PS |
3059 | if (*sport == 0) { |
3060 | int rc; | |
1da177e4 | 3061 | |
a9f1b85e PS |
3062 | /* try with 445 port at first */ |
3063 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 3064 | |
a9f1b85e | 3065 | rc = generic_ip_connect(server); |
1da177e4 | 3066 | if (rc >= 0) |
a9f1b85e | 3067 | return rc; |
6a5fa236 | 3068 | |
a9f1b85e PS |
3069 | /* if it failed, try with 139 port */ |
3070 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
3071 | } |
3072 | ||
a9f1b85e | 3073 | return generic_ip_connect(server); |
1da177e4 LT |
3074 | } |
3075 | ||
6d5786a3 | 3076 | void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon, |
2c6292ae | 3077 | struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) |
8af18971 SF |
3078 | { |
3079 | /* if we are reconnecting then should we check to see if | |
3080 | * any requested capabilities changed locally e.g. via | |
3081 | * remount but we can not do much about it here | |
3082 | * if they have (even if we could detect it by the following) | |
3083 | * Perhaps we could add a backpointer to array of sb from tcon | |
3084 | * or if we change to make all sb to same share the same | |
3085 | * sb as NFS - then we only have one backpointer to sb. | |
3086 | * What if we wanted to mount the server share twice once with | |
3087 | * and once without posixacls or posix paths? */ | |
3088 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 3089 | |
c18c842b SF |
3090 | if (vol_info && vol_info->no_linux_ext) { |
3091 | tcon->fsUnixInfo.Capability = 0; | |
3092 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
b6b38f70 | 3093 | cFYI(1, "Linux protocol extensions disabled"); |
c18c842b SF |
3094 | return; |
3095 | } else if (vol_info) | |
3096 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
3097 | ||
3098 | if (tcon->unix_ext == 0) { | |
b6b38f70 | 3099 | cFYI(1, "Unix extensions disabled so not set on reconnect"); |
c18c842b SF |
3100 | return; |
3101 | } | |
50c2f753 | 3102 | |
fb8c4b14 | 3103 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 3104 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
6848b733 | 3105 | cFYI(1, "unix caps which server supports %lld", cap); |
8af18971 SF |
3106 | /* check for reconnect case in which we do not |
3107 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 3108 | if (vol_info == NULL) { |
50c2f753 | 3109 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
3110 | originally at mount time */ |
3111 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
3112 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
3113 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
3114 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
b6b38f70 | 3115 | cERROR(1, "POSIXPATH support change"); |
8af18971 | 3116 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 3117 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
b6b38f70 JP |
3118 | cERROR(1, "possible reconnect error"); |
3119 | cERROR(1, "server disabled POSIX path support"); | |
11b6d645 | 3120 | } |
8af18971 | 3121 | } |
50c2f753 | 3122 | |
6848b733 SF |
3123 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
3124 | cERROR(1, "per-share encryption not supported yet"); | |
3125 | ||
8af18971 | 3126 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 3127 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 3128 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 3129 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
b6b38f70 | 3130 | cFYI(1, "negotiated posix acl support"); |
2c6292ae AV |
3131 | if (cifs_sb) |
3132 | cifs_sb->mnt_cifs_flags |= | |
3133 | CIFS_MOUNT_POSIXACL; | |
8af18971 SF |
3134 | } |
3135 | ||
75865f8c | 3136 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 3137 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 3138 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
b6b38f70 | 3139 | cFYI(1, "negotiate posix pathnames"); |
2c6292ae AV |
3140 | if (cifs_sb) |
3141 | cifs_sb->mnt_cifs_flags |= | |
8af18971 SF |
3142 | CIFS_MOUNT_POSIX_PATHS; |
3143 | } | |
50c2f753 | 3144 | |
b6b38f70 | 3145 | cFYI(1, "Negotiate caps 0x%x", (int)cap); |
8af18971 | 3146 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 3147 | if (cap & CIFS_UNIX_FCNTL_CAP) |
b6b38f70 | 3148 | cFYI(1, "FCNTL cap"); |
75865f8c | 3149 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
b6b38f70 | 3150 | cFYI(1, "EXTATTR cap"); |
75865f8c | 3151 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
b6b38f70 | 3152 | cFYI(1, "POSIX path cap"); |
75865f8c | 3153 | if (cap & CIFS_UNIX_XATTR_CAP) |
b6b38f70 | 3154 | cFYI(1, "XATTR cap"); |
75865f8c | 3155 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
b6b38f70 | 3156 | cFYI(1, "POSIX ACL cap"); |
75865f8c | 3157 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
b6b38f70 | 3158 | cFYI(1, "very large read cap"); |
75865f8c | 3159 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
b6b38f70 | 3160 | cFYI(1, "very large write cap"); |
6848b733 SF |
3161 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
3162 | cFYI(1, "transport encryption cap"); | |
3163 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) | |
3164 | cFYI(1, "mandatory transport encryption cap"); | |
8af18971 SF |
3165 | #endif /* CIFS_DEBUG2 */ |
3166 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 3167 | if (vol_info == NULL) { |
b6b38f70 | 3168 | cFYI(1, "resetting capabilities failed"); |
442aa310 | 3169 | } else |
b6b38f70 | 3170 | cERROR(1, "Negotiating Unix capabilities " |
ac3aa2f8 JL |
3171 | "with the server failed. Consider " |
3172 | "mounting with the Unix Extensions " | |
3173 | "disabled if problems are found " | |
5a44b319 | 3174 | "by specifying the nounix mount " |
b6b38f70 | 3175 | "option."); |
5a44b319 | 3176 | |
8af18971 SF |
3177 | } |
3178 | } | |
3179 | } | |
3180 | ||
724d9f1c PS |
3181 | void cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
3182 | struct cifs_sb_info *cifs_sb) | |
b1c8d2b4 | 3183 | { |
2de970ff JL |
3184 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
3185 | ||
2ced6f69 AV |
3186 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
3187 | cifs_sb->tlink_tree = RB_ROOT; | |
3188 | ||
25c7f41e | 3189 | /* |
5eba8ab3 JL |
3190 | * Temporarily set r/wsize for matching superblock. If we end up using |
3191 | * new sb then client will later negotiate it downward if needed. | |
25c7f41e | 3192 | */ |
5eba8ab3 | 3193 | cifs_sb->rsize = pvolume_info->rsize; |
25c7f41e PS |
3194 | cifs_sb->wsize = pvolume_info->wsize; |
3195 | ||
3b795210 SF |
3196 | cifs_sb->mnt_uid = pvolume_info->linux_uid; |
3197 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
3198 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
3199 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
5206efd6 | 3200 | cFYI(1, "file mode: 0x%hx dir mode: 0x%hx", |
b6b38f70 | 3201 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); |
3b795210 | 3202 | |
6d20e840 | 3203 | cifs_sb->actimeo = pvolume_info->actimeo; |
724d9f1c | 3204 | cifs_sb->local_nls = pvolume_info->local_nls; |
6d20e840 | 3205 | |
3b795210 SF |
3206 | if (pvolume_info->noperm) |
3207 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
3208 | if (pvolume_info->setuids) | |
3209 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
3210 | if (pvolume_info->server_ino) | |
3211 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
3212 | if (pvolume_info->remap) | |
3213 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; | |
3214 | if (pvolume_info->no_xattr) | |
3215 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
3216 | if (pvolume_info->sfu_emul) | |
3217 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
3218 | if (pvolume_info->nobrl) | |
3219 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 3220 | if (pvolume_info->nostrictsync) |
4717bed6 | 3221 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
3222 | if (pvolume_info->mand_lock) |
3223 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
d4ffff1f PS |
3224 | if (pvolume_info->rwpidforward) |
3225 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; | |
3b795210 SF |
3226 | if (pvolume_info->cifs_acl) |
3227 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
3c7c87fd | 3228 | if (pvolume_info->backupuid_specified) { |
3d3ea8e6 | 3229 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; |
3c7c87fd SP |
3230 | cifs_sb->mnt_backupuid = pvolume_info->backupuid; |
3231 | } | |
3232 | if (pvolume_info->backupgid_specified) { | |
3d3ea8e6 | 3233 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; |
3c7c87fd SP |
3234 | cifs_sb->mnt_backupgid = pvolume_info->backupgid; |
3235 | } | |
3b795210 SF |
3236 | if (pvolume_info->override_uid) |
3237 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
3238 | if (pvolume_info->override_gid) | |
3239 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
3240 | if (pvolume_info->dynperm) | |
3241 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
3242 | if (pvolume_info->fsc) |
3243 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
3244 | if (pvolume_info->multiuser) |
3245 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
3246 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
3247 | if (pvolume_info->strict_io) |
3248 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 3249 | if (pvolume_info->direct_io) { |
b6b38f70 | 3250 | cFYI(1, "mounting share using direct i/o"); |
3b795210 SF |
3251 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
3252 | } | |
736a3320 SM |
3253 | if (pvolume_info->mfsymlinks) { |
3254 | if (pvolume_info->sfu_emul) { | |
3255 | cERROR(1, "mount option mfsymlinks ignored if sfu " | |
3256 | "mount option is used"); | |
3257 | } else { | |
3258 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; | |
3259 | } | |
3260 | } | |
3b795210 SF |
3261 | |
3262 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
b6b38f70 JP |
3263 | cERROR(1, "mount option dynperm ignored if cifsacl " |
3264 | "mount option supported"); | |
b1c8d2b4 JL |
3265 | } |
3266 | ||
b9bce2e9 JL |
3267 | static void |
3268 | cleanup_volume_info_contents(struct smb_vol *volume_info) | |
1bfe73c2 | 3269 | { |
b946845a | 3270 | kfree(volume_info->username); |
1bfe73c2 | 3271 | kzfree(volume_info->password); |
95c75454 | 3272 | kfree(volume_info->UNC); |
b946845a SF |
3273 | kfree(volume_info->domainname); |
3274 | kfree(volume_info->iocharset); | |
1bfe73c2 | 3275 | kfree(volume_info->prepath); |
b9bce2e9 JL |
3276 | } |
3277 | ||
3278 | void | |
3279 | cifs_cleanup_volume_info(struct smb_vol *volume_info) | |
3280 | { | |
3281 | if (!volume_info) | |
3282 | return; | |
3283 | cleanup_volume_info_contents(volume_info); | |
1bfe73c2 | 3284 | kfree(volume_info); |
1bfe73c2 IM |
3285 | } |
3286 | ||
b9bce2e9 | 3287 | |
2d6d589d | 3288 | #ifdef CONFIG_CIFS_DFS_UPCALL |
6d3ea7e4 SF |
3289 | /* |
3290 | * cifs_build_path_to_root returns full path to root when we do not have an | |
3291 | * exiting connection (tcon) | |
3292 | */ | |
1bfe73c2 | 3293 | static char * |
b2a0fa15 | 3294 | build_unc_path_to_root(const struct smb_vol *vol, |
1bfe73c2 IM |
3295 | const struct cifs_sb_info *cifs_sb) |
3296 | { | |
b2a0fa15 | 3297 | char *full_path, *pos; |
839db3d1 | 3298 | unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0; |
b2a0fa15 | 3299 | unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); |
1bfe73c2 | 3300 | |
b2a0fa15 | 3301 | full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); |
1bfe73c2 IM |
3302 | if (full_path == NULL) |
3303 | return ERR_PTR(-ENOMEM); | |
3304 | ||
b2a0fa15 JL |
3305 | strncpy(full_path, vol->UNC, unc_len); |
3306 | pos = full_path + unc_len; | |
3307 | ||
3308 | if (pplen) { | |
839db3d1 | 3309 | *pos++ = CIFS_DIR_SEP(cifs_sb); |
b2a0fa15 JL |
3310 | strncpy(pos, vol->prepath, pplen); |
3311 | pos += pplen; | |
3312 | } | |
3313 | ||
3314 | *pos = '\0'; /* add trailing null */ | |
f87d39d9 | 3315 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
b2a0fa15 | 3316 | cFYI(1, "%s: full_path=%s", __func__, full_path); |
1bfe73c2 IM |
3317 | return full_path; |
3318 | } | |
dd613945 SF |
3319 | |
3320 | /* | |
3321 | * Perform a dfs referral query for a share and (optionally) prefix | |
3322 | * | |
046462ab SF |
3323 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
3324 | * to a string containing updated options for the submount. Otherwise it | |
3325 | * will be left untouched. | |
dd613945 SF |
3326 | * |
3327 | * Returns the rc from get_dfs_path to the caller, which can be used to | |
3328 | * determine whether there were referrals. | |
3329 | */ | |
3330 | static int | |
b669f33c | 3331 | expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses, |
dd613945 | 3332 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, |
046462ab | 3333 | int check_prefix) |
dd613945 SF |
3334 | { |
3335 | int rc; | |
3336 | unsigned int num_referrals = 0; | |
3337 | struct dfs_info3_param *referrals = NULL; | |
3338 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; | |
3339 | ||
3340 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
3341 | if (IS_ERR(full_path)) | |
3342 | return PTR_ERR(full_path); | |
3343 | ||
3344 | /* For DFS paths, skip the first '\' of the UNC */ | |
3345 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; | |
3346 | ||
b669f33c | 3347 | rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls, |
dd613945 SF |
3348 | &num_referrals, &referrals, |
3349 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3350 | ||
3351 | if (!rc && num_referrals > 0) { | |
3352 | char *fake_devname = NULL; | |
3353 | ||
3354 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, | |
3355 | full_path + 1, referrals, | |
3356 | &fake_devname); | |
3357 | ||
3358 | free_dfs_info_array(referrals, num_referrals); | |
046462ab | 3359 | |
dd613945 SF |
3360 | if (IS_ERR(mdata)) { |
3361 | rc = PTR_ERR(mdata); | |
3362 | mdata = NULL; | |
b9bce2e9 JL |
3363 | } else { |
3364 | cleanup_volume_info_contents(volume_info); | |
b9bce2e9 JL |
3365 | rc = cifs_setup_volume_info(volume_info, mdata, |
3366 | fake_devname); | |
dd613945 | 3367 | } |
b9bce2e9 JL |
3368 | kfree(fake_devname); |
3369 | kfree(cifs_sb->mountdata); | |
046462ab | 3370 | cifs_sb->mountdata = mdata; |
dd613945 SF |
3371 | } |
3372 | kfree(full_path); | |
3373 | return rc; | |
3374 | } | |
2d6d589d | 3375 | #endif |
1bfe73c2 | 3376 | |
04db79b0 JL |
3377 | static int |
3378 | cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, | |
3379 | const char *devname) | |
1da177e4 | 3380 | { |
724d9f1c | 3381 | int rc = 0; |
1da177e4 | 3382 | |
04db79b0 JL |
3383 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) |
3384 | return -EINVAL; | |
1da177e4 | 3385 | |
7586b765 | 3386 | if (volume_info->nullauth) { |
04febabc JL |
3387 | cFYI(1, "Anonymous login"); |
3388 | kfree(volume_info->username); | |
3389 | volume_info->username = NULL; | |
7586b765 | 3390 | } else if (volume_info->username) { |
1da177e4 | 3391 | /* BB fixme parse for domain name here */ |
b6b38f70 | 3392 | cFYI(1, "Username: %s", volume_info->username); |
1da177e4 | 3393 | } else { |
bf820679 | 3394 | cifserror("No username specified"); |
50c2f753 SF |
3395 | /* In userspace mount helper we can get user name from alternate |
3396 | locations such as env variables and files on disk */ | |
04db79b0 | 3397 | return -EINVAL; |
1da177e4 LT |
3398 | } |
3399 | ||
1da177e4 | 3400 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 3401 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
3402 | /* load_nls_default cannot return null */ |
3403 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 3404 | } else { |
a5fc4ce0 JL |
3405 | volume_info->local_nls = load_nls(volume_info->iocharset); |
3406 | if (volume_info->local_nls == NULL) { | |
b6b38f70 JP |
3407 | cERROR(1, "CIFS mount error: iocharset %s not found", |
3408 | volume_info->iocharset); | |
04db79b0 | 3409 | return -ELIBACC; |
1da177e4 LT |
3410 | } |
3411 | } | |
724d9f1c | 3412 | |
724d9f1c PS |
3413 | return rc; |
3414 | } | |
3415 | ||
04db79b0 JL |
3416 | struct smb_vol * |
3417 | cifs_get_volume_info(char *mount_data, const char *devname) | |
3418 | { | |
3419 | int rc; | |
3420 | struct smb_vol *volume_info; | |
3421 | ||
6ee9542a | 3422 | volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL); |
04db79b0 JL |
3423 | if (!volume_info) |
3424 | return ERR_PTR(-ENOMEM); | |
3425 | ||
3426 | rc = cifs_setup_volume_info(volume_info, mount_data, devname); | |
3427 | if (rc) { | |
3428 | cifs_cleanup_volume_info(volume_info); | |
3429 | volume_info = ERR_PTR(rc); | |
3430 | } | |
3431 | ||
3432 | return volume_info; | |
3433 | } | |
3434 | ||
724d9f1c | 3435 | int |
2c6292ae | 3436 | cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) |
724d9f1c | 3437 | { |
1daaae8f | 3438 | int rc; |
6d5786a3 | 3439 | unsigned int xid; |
af4281dc | 3440 | struct cifs_ses *ses; |
96daf2b0 | 3441 | struct cifs_tcon *tcon; |
af4281dc | 3442 | struct TCP_Server_Info *server; |
724d9f1c PS |
3443 | char *full_path; |
3444 | struct tcon_link *tlink; | |
3445 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
3446 | int referral_walks_count = 0; | |
20547490 | 3447 | #endif |
dd854466 AV |
3448 | |
3449 | rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); | |
3450 | if (rc) | |
3451 | return rc; | |
3452 | ||
20547490 | 3453 | #ifdef CONFIG_CIFS_DFS_UPCALL |
724d9f1c PS |
3454 | try_mount_again: |
3455 | /* cleanup activities if we're chasing a referral */ | |
3456 | if (referral_walks_count) { | |
3457 | if (tcon) | |
3458 | cifs_put_tcon(tcon); | |
af4281dc PS |
3459 | else if (ses) |
3460 | cifs_put_smb_ses(ses); | |
724d9f1c | 3461 | |
6d5786a3 | 3462 | free_xid(xid); |
724d9f1c PS |
3463 | } |
3464 | #endif | |
1daaae8f | 3465 | rc = 0; |
724d9f1c | 3466 | tcon = NULL; |
af4281dc PS |
3467 | ses = NULL; |
3468 | server = NULL; | |
724d9f1c PS |
3469 | full_path = NULL; |
3470 | tlink = NULL; | |
3471 | ||
6d5786a3 | 3472 | xid = get_xid(); |
1da177e4 | 3473 | |
63c038c2 | 3474 | /* get a reference to a tcp session */ |
af4281dc PS |
3475 | server = cifs_get_tcp_session(volume_info); |
3476 | if (IS_ERR(server)) { | |
3477 | rc = PTR_ERR(server); | |
dd854466 | 3478 | bdi_destroy(&cifs_sb->bdi); |
63c038c2 | 3479 | goto out; |
1da177e4 LT |
3480 | } |
3481 | ||
36988c76 | 3482 | /* get a reference to a SMB session */ |
af4281dc PS |
3483 | ses = cifs_get_smb_ses(server, volume_info); |
3484 | if (IS_ERR(ses)) { | |
3485 | rc = PTR_ERR(ses); | |
3486 | ses = NULL; | |
36988c76 | 3487 | goto mount_fail_check; |
1da177e4 | 3488 | } |
50c2f753 | 3489 | |
d00c28de | 3490 | /* search for existing tcon to this server share */ |
af4281dc | 3491 | tcon = cifs_get_tcon(ses, volume_info); |
d00c28de JL |
3492 | if (IS_ERR(tcon)) { |
3493 | rc = PTR_ERR(tcon); | |
3494 | tcon = NULL; | |
1bfe73c2 | 3495 | goto remote_path_check; |
d00c28de | 3496 | } |
1bfe73c2 | 3497 | |
d82c2df5 | 3498 | /* tell server which Unix caps we support */ |
29e20f9c | 3499 | if (cap_unix(tcon->ses)) { |
d82c2df5 SF |
3500 | /* reset of caps checks mount to see if unix extensions |
3501 | disabled for just this mount */ | |
2c6292ae | 3502 | reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info); |
6848b733 SF |
3503 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && |
3504 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & | |
3505 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) { | |
3506 | rc = -EACCES; | |
3507 | goto mount_fail_check; | |
3508 | } | |
3509 | } else | |
d82c2df5 | 3510 | tcon->unix_ext = 0; /* server does not support them */ |
c18c842b | 3511 | |
af4281dc PS |
3512 | /* do not care if a following call succeed - informational */ |
3513 | if (!tcon->ipc && server->ops->qfs_tcon) | |
3514 | server->ops->qfs_tcon(xid, tcon); | |
6848b733 | 3515 | |
24985c53 PS |
3516 | cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info); |
3517 | cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info); | |
f7910cbd | 3518 | |
66bfaadc | 3519 | /* tune readahead according to rsize */ |
8f71465c | 3520 | cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE; |
f7910cbd | 3521 | |
1bfe73c2 | 3522 | remote_path_check: |
c1508ca2 SF |
3523 | #ifdef CONFIG_CIFS_DFS_UPCALL |
3524 | /* | |
3525 | * Perform an unconditional check for whether there are DFS | |
3526 | * referrals for this path without prefix, to provide support | |
3527 | * for DFS referrals from w2k8 servers which don't seem to respond | |
3528 | * with PATH_NOT_COVERED to requests that include the prefix. | |
3529 | * Chase the referral if found, otherwise continue normally. | |
3530 | */ | |
3531 | if (referral_walks_count == 0) { | |
af4281dc PS |
3532 | int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, |
3533 | false); | |
c1508ca2 SF |
3534 | if (!refrc) { |
3535 | referral_walks_count++; | |
3536 | goto try_mount_again; | |
3537 | } | |
3538 | } | |
3539 | #endif | |
3540 | ||
f87d39d9 | 3541 | /* check if a whole path is not remote */ |
70945643 | 3542 | if (!rc && tcon) { |
68889f26 PS |
3543 | if (!server->ops->is_path_accessible) { |
3544 | rc = -ENOSYS; | |
3545 | goto mount_fail_check; | |
3546 | } | |
6d3ea7e4 SF |
3547 | /* |
3548 | * cifs_build_path_to_root works only when we have a valid tcon | |
3549 | */ | |
3550 | full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon); | |
e4cce94c IM |
3551 | if (full_path == NULL) { |
3552 | rc = -ENOMEM; | |
3553 | goto mount_fail_check; | |
3554 | } | |
68889f26 PS |
3555 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, |
3556 | full_path); | |
03ceace5 | 3557 | if (rc != 0 && rc != -EREMOTE) { |
e4cce94c IM |
3558 | kfree(full_path); |
3559 | goto mount_fail_check; | |
3560 | } | |
3561 | kfree(full_path); | |
3562 | } | |
3563 | ||
1bfe73c2 IM |
3564 | /* get referral if needed */ |
3565 | if (rc == -EREMOTE) { | |
d036f50f | 3566 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
3567 | if (referral_walks_count > MAX_NESTED_LINKS) { |
3568 | /* | |
3569 | * BB: when we implement proper loop detection, | |
3570 | * we will remove this check. But now we need it | |
3571 | * to prevent an indefinite loop if 'DFS tree' is | |
3572 | * misconfigured (i.e. has loops). | |
3573 | */ | |
3574 | rc = -ELOOP; | |
3575 | goto mount_fail_check; | |
3576 | } | |
1bfe73c2 | 3577 | |
af4281dc | 3578 | rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true); |
7b91e266 | 3579 | |
dd613945 | 3580 | if (!rc) { |
5c2503a8 | 3581 | referral_walks_count++; |
1bfe73c2 IM |
3582 | goto try_mount_again; |
3583 | } | |
dd613945 | 3584 | goto mount_fail_check; |
d036f50f SF |
3585 | #else /* No DFS support, return error on mount */ |
3586 | rc = -EOPNOTSUPP; | |
3587 | #endif | |
1bfe73c2 IM |
3588 | } |
3589 | ||
9d002df4 JL |
3590 | if (rc) |
3591 | goto mount_fail_check; | |
3592 | ||
3593 | /* now, hang the tcon off of the superblock */ | |
3594 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); | |
3595 | if (tlink == NULL) { | |
3596 | rc = -ENOMEM; | |
3597 | goto mount_fail_check; | |
3598 | } | |
3599 | ||
af4281dc | 3600 | tlink->tl_uid = ses->linux_uid; |
9d002df4 JL |
3601 | tlink->tl_tcon = tcon; |
3602 | tlink->tl_time = jiffies; | |
3603 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
3604 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3605 | ||
b647c35f | 3606 | cifs_sb->master_tlink = tlink; |
9d002df4 | 3607 | spin_lock(&cifs_sb->tlink_tree_lock); |
b647c35f | 3608 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
9d002df4 | 3609 | spin_unlock(&cifs_sb->tlink_tree_lock); |
413e661c | 3610 | |
da472fc8 | 3611 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
3612 | TLINK_IDLE_EXPIRE); |
3613 | ||
1bfe73c2 IM |
3614 | mount_fail_check: |
3615 | /* on error free sesinfo and tcon struct if needed */ | |
3616 | if (rc) { | |
1bfe73c2 | 3617 | /* If find_unc succeeded then rc == 0 so we can not end */ |
25985edc | 3618 | /* up accidentally freeing someone elses tcon struct */ |
1bfe73c2 IM |
3619 | if (tcon) |
3620 | cifs_put_tcon(tcon); | |
af4281dc PS |
3621 | else if (ses) |
3622 | cifs_put_smb_ses(ses); | |
1bfe73c2 | 3623 | else |
af4281dc | 3624 | cifs_put_tcp_session(server); |
dd854466 | 3625 | bdi_destroy(&cifs_sb->bdi); |
1bfe73c2 IM |
3626 | } |
3627 | ||
70fe7dc0 | 3628 | out: |
6d5786a3 | 3629 | free_xid(xid); |
1da177e4 LT |
3630 | return rc; |
3631 | } | |
3632 | ||
8d1bca32 JL |
3633 | /* |
3634 | * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon | |
3635 | * pointer may be NULL. | |
3636 | */ | |
1da177e4 | 3637 | int |
2e6e02ab | 3638 | CIFSTCon(const unsigned int xid, struct cifs_ses *ses, |
96daf2b0 | 3639 | const char *tree, struct cifs_tcon *tcon, |
1da177e4 LT |
3640 | const struct nls_table *nls_codepage) |
3641 | { | |
3642 | struct smb_hdr *smb_buffer; | |
3643 | struct smb_hdr *smb_buffer_response; | |
3644 | TCONX_REQ *pSMB; | |
3645 | TCONX_RSP *pSMBr; | |
3646 | unsigned char *bcc_ptr; | |
3647 | int rc = 0; | |
690c522f JL |
3648 | int length; |
3649 | __u16 bytes_left, count; | |
1da177e4 LT |
3650 | |
3651 | if (ses == NULL) | |
3652 | return -EIO; | |
3653 | ||
3654 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 3655 | if (smb_buffer == NULL) |
1da177e4 | 3656 | return -ENOMEM; |
ca43e3be | 3657 | |
1da177e4 LT |
3658 | smb_buffer_response = smb_buffer; |
3659 | ||
3660 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
3661 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 | 3662 | |
88257360 | 3663 | smb_buffer->Mid = get_next_mid(ses->server); |
1da177e4 LT |
3664 | smb_buffer->Uid = ses->Suid; |
3665 | pSMB = (TCONX_REQ *) smb_buffer; | |
3666 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
3667 | ||
3668 | pSMB->AndXCommand = 0xFF; | |
3669 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 3670 | bcc_ptr = &pSMB->Password[0]; |
8d1bca32 | 3671 | if (!tcon || (ses->server->sec_mode & SECMODE_USER)) { |
eeac8047 | 3672 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 3673 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 3674 | bcc_ptr++; /* skip password */ |
7c7b25bc | 3675 | /* already aligned so no need to do it below */ |
eeac8047 | 3676 | } else { |
540b2e37 | 3677 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
3678 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
3679 | specified as required (when that support is added to | |
3680 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 3681 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
3682 | by Samba (not sure whether other servers allow |
3683 | NTLMv2 password here) */ | |
7c7b25bc | 3684 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 3685 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
00e485b0 | 3686 | (ses->server->secType == LANMAN)) |
d3ba50b1 | 3687 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
96daf2b0 | 3688 | ses->server->sec_mode & |
4e53a3fb JL |
3689 | SECMODE_PW_ENCRYPT ? true : false, |
3690 | bcc_ptr); | |
7c7b25bc SF |
3691 | else |
3692 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 | 3693 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
9ef5992e | 3694 | bcc_ptr, nls_codepage); |
eeac8047 | 3695 | |
540b2e37 | 3696 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 3697 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
3698 | /* must align unicode strings */ |
3699 | *bcc_ptr = 0; /* null byte password */ | |
3700 | bcc_ptr++; | |
3701 | } | |
eeac8047 | 3702 | } |
1da177e4 | 3703 | |
96daf2b0 | 3704 | if (ses->server->sec_mode & |
a878fb22 | 3705 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
1da177e4 LT |
3706 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
3707 | ||
3708 | if (ses->capabilities & CAP_STATUS32) { | |
3709 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
3710 | } | |
3711 | if (ses->capabilities & CAP_DFS) { | |
3712 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
3713 | } | |
3714 | if (ses->capabilities & CAP_UNICODE) { | |
3715 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
3716 | length = | |
acbbb76a | 3717 | cifs_strtoUTF16((__le16 *) bcc_ptr, tree, |
50c2f753 | 3718 | 6 /* max utf8 char length in bytes */ * |
a878fb22 SF |
3719 | (/* server len*/ + 256 /* share len */), nls_codepage); |
3720 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
3721 | bcc_ptr += 2; /* skip trailing null */ |
3722 | } else { /* ASCII */ | |
1da177e4 LT |
3723 | strcpy(bcc_ptr, tree); |
3724 | bcc_ptr += strlen(tree) + 1; | |
3725 | } | |
3726 | strcpy(bcc_ptr, "?????"); | |
3727 | bcc_ptr += strlen("?????"); | |
3728 | bcc_ptr += 1; | |
3729 | count = bcc_ptr - &pSMB->Password[0]; | |
be8e3b00 SF |
3730 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
3731 | pSMB->hdr.smb_buf_length) + count); | |
1da177e4 LT |
3732 | pSMB->ByteCount = cpu_to_le16(count); |
3733 | ||
133672ef | 3734 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 3735 | 0); |
1da177e4 | 3736 | |
1da177e4 LT |
3737 | /* above now done in SendReceive */ |
3738 | if ((rc == 0) && (tcon != NULL)) { | |
0e0d2cf3 SF |
3739 | bool is_unicode; |
3740 | ||
1da177e4 | 3741 | tcon->tidStatus = CifsGood; |
3b795210 | 3742 | tcon->need_reconnect = false; |
1da177e4 LT |
3743 | tcon->tid = smb_buffer_response->Tid; |
3744 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 3745 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 3746 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
3747 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
3748 | is_unicode = true; | |
3749 | else | |
3750 | is_unicode = false; | |
3751 | ||
cc20c031 | 3752 | |
50c2f753 | 3753 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
3754 | if (length == 3) { |
3755 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
3756 | (bcc_ptr[2] == 'C')) { | |
b6b38f70 | 3757 | cFYI(1, "IPC connection"); |
7f8ed420 SF |
3758 | tcon->ipc = 1; |
3759 | } | |
3760 | } else if (length == 2) { | |
3761 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
3762 | /* the most common case */ | |
b6b38f70 | 3763 | cFYI(1, "disk share connection"); |
7f8ed420 SF |
3764 | } |
3765 | } | |
50c2f753 | 3766 | bcc_ptr += length + 1; |
cc20c031 | 3767 | bytes_left -= (length + 1); |
1da177e4 | 3768 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); |
cc20c031 JL |
3769 | |
3770 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 3771 | kfree(tcon->nativeFileSystem); |
acbbb76a | 3772 | tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr, |
0e0d2cf3 | 3773 | bytes_left, is_unicode, |
cc20c031 JL |
3774 | nls_codepage); |
3775 | ||
b6b38f70 | 3776 | cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem); |
cc20c031 | 3777 | |
fb8c4b14 | 3778 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
3779 | (smb_buffer_response->WordCount == 7)) |
3780 | /* field is in same location */ | |
3979877e SF |
3781 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
3782 | else | |
3783 | tcon->Flags = 0; | |
b6b38f70 | 3784 | cFYI(1, "Tcon flags: 0x%x ", tcon->Flags); |
1da177e4 | 3785 | } else if ((rc == 0) && tcon == NULL) { |
50c2f753 | 3786 | /* all we need to save for IPC$ connection */ |
1da177e4 LT |
3787 | ses->ipc_tid = smb_buffer_response->Tid; |
3788 | } | |
3789 | ||
a8a11d39 | 3790 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
3791 | return rc; |
3792 | } | |
3793 | ||
2a9b9951 AV |
3794 | void |
3795 | cifs_umount(struct cifs_sb_info *cifs_sb) | |
1da177e4 | 3796 | { |
b647c35f JL |
3797 | struct rb_root *root = &cifs_sb->tlink_tree; |
3798 | struct rb_node *node; | |
3799 | struct tcon_link *tlink; | |
9d002df4 | 3800 | |
2de970ff JL |
3801 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
3802 | ||
b647c35f JL |
3803 | spin_lock(&cifs_sb->tlink_tree_lock); |
3804 | while ((node = rb_first(root))) { | |
3805 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3806 | cifs_get_tlink(tlink); | |
3807 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3808 | rb_erase(node, root); | |
1da177e4 | 3809 | |
b647c35f JL |
3810 | spin_unlock(&cifs_sb->tlink_tree_lock); |
3811 | cifs_put_tlink(tlink); | |
3812 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3813 | } | |
3814 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 3815 | |
dd854466 | 3816 | bdi_destroy(&cifs_sb->bdi); |
d757d71b AV |
3817 | kfree(cifs_sb->mountdata); |
3818 | unload_nls(cifs_sb->local_nls); | |
3819 | kfree(cifs_sb); | |
50c2f753 | 3820 | } |
1da177e4 | 3821 | |
286170aa PS |
3822 | int |
3823 | cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses) | |
1da177e4 LT |
3824 | { |
3825 | int rc = 0; | |
198b5682 | 3826 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 3827 | |
286170aa PS |
3828 | if (!server->ops->need_neg || !server->ops->negotiate) |
3829 | return -ENOSYS; | |
3830 | ||
198b5682 | 3831 | /* only send once per connect */ |
286170aa | 3832 | if (!server->ops->need_neg(server)) |
198b5682 JL |
3833 | return 0; |
3834 | ||
45275789 | 3835 | set_credits(server, 1); |
286170aa PS |
3836 | |
3837 | rc = server->ops->negotiate(xid, ses); | |
198b5682 JL |
3838 | if (rc == 0) { |
3839 | spin_lock(&GlobalMid_Lock); | |
7fdbaa1b | 3840 | if (server->tcpStatus == CifsNeedNegotiate) |
198b5682 JL |
3841 | server->tcpStatus = CifsGood; |
3842 | else | |
3843 | rc = -EHOSTDOWN; | |
3844 | spin_unlock(&GlobalMid_Lock); | |
198b5682 JL |
3845 | } |
3846 | ||
3847 | return rc; | |
3848 | } | |
3849 | ||
58c45c58 PS |
3850 | int |
3851 | cifs_setup_session(const unsigned int xid, struct cifs_ses *ses, | |
3852 | struct nls_table *nls_info) | |
198b5682 | 3853 | { |
58c45c58 | 3854 | int rc = -ENOSYS; |
198b5682 | 3855 | struct TCP_Server_Info *server = ses->server; |
26b994fa | 3856 | |
198b5682 JL |
3857 | ses->flags = 0; |
3858 | ses->capabilities = server->capabilities; | |
26b994fa | 3859 | if (linuxExtEnabled == 0) |
29e20f9c | 3860 | ses->capabilities &= (~server->vals->cap_unix); |
20418acd | 3861 | |
b6b38f70 | 3862 | cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d", |
96daf2b0 | 3863 | server->sec_mode, server->capabilities, server->timeAdj); |
cb7691b6 | 3864 | |
58c45c58 PS |
3865 | if (server->ops->sess_setup) |
3866 | rc = server->ops->sess_setup(xid, ses, nls_info); | |
3867 | ||
26b994fa | 3868 | if (rc) { |
b6b38f70 | 3869 | cERROR(1, "Send error in SessSetup = %d", rc); |
26b994fa | 3870 | } else { |
5d0d2882 SP |
3871 | mutex_lock(&ses->server->srv_mutex); |
3872 | if (!server->session_estab) { | |
21e73393 | 3873 | server->session_key.response = ses->auth_key.response; |
5d0d2882 | 3874 | server->session_key.len = ses->auth_key.len; |
21e73393 SP |
3875 | server->sequence_number = 0x2; |
3876 | server->session_estab = true; | |
3877 | ses->auth_key.response = NULL; | |
5d0d2882 SP |
3878 | } |
3879 | mutex_unlock(&server->srv_mutex); | |
3880 | ||
b6b38f70 | 3881 | cFYI(1, "CIFS Session Established successfully"); |
20418acd | 3882 | spin_lock(&GlobalMid_Lock); |
198b5682 JL |
3883 | ses->status = CifsGood; |
3884 | ses->need_reconnect = false; | |
20418acd | 3885 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 3886 | } |
26b994fa | 3887 | |
21e73393 SP |
3888 | kfree(ses->auth_key.response); |
3889 | ses->auth_key.response = NULL; | |
3890 | ses->auth_key.len = 0; | |
d3686d54 SP |
3891 | kfree(ses->ntlmssp); |
3892 | ses->ntlmssp = NULL; | |
21e73393 | 3893 | |
1da177e4 LT |
3894 | return rc; |
3895 | } | |
3896 | ||
8a8798a5 JL |
3897 | static int |
3898 | cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses) | |
3899 | { | |
3900 | switch (ses->server->secType) { | |
3901 | case Kerberos: | |
3902 | vol->secFlg = CIFSSEC_MUST_KRB5; | |
3903 | return 0; | |
3904 | case NTLMv2: | |
3905 | vol->secFlg = CIFSSEC_MUST_NTLMV2; | |
3906 | break; | |
3907 | case NTLM: | |
3908 | vol->secFlg = CIFSSEC_MUST_NTLM; | |
3909 | break; | |
3910 | case RawNTLMSSP: | |
3911 | vol->secFlg = CIFSSEC_MUST_NTLMSSP; | |
3912 | break; | |
3913 | case LANMAN: | |
3914 | vol->secFlg = CIFSSEC_MUST_LANMAN; | |
3915 | break; | |
3916 | } | |
3917 | ||
3918 | return cifs_set_cifscreds(vol, ses); | |
3919 | } | |
3920 | ||
96daf2b0 | 3921 | static struct cifs_tcon * |
9d002df4 JL |
3922 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid) |
3923 | { | |
8a8798a5 | 3924 | int rc; |
96daf2b0 SF |
3925 | struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); |
3926 | struct cifs_ses *ses; | |
3927 | struct cifs_tcon *tcon = NULL; | |
9d002df4 | 3928 | struct smb_vol *vol_info; |
9d002df4 JL |
3929 | |
3930 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
803ab977 DC |
3931 | if (vol_info == NULL) |
3932 | return ERR_PTR(-ENOMEM); | |
9d002df4 | 3933 | |
9d002df4 JL |
3934 | vol_info->local_nls = cifs_sb->local_nls; |
3935 | vol_info->linux_uid = fsuid; | |
3936 | vol_info->cred_uid = fsuid; | |
3937 | vol_info->UNC = master_tcon->treeName; | |
3938 | vol_info->retry = master_tcon->retry; | |
3939 | vol_info->nocase = master_tcon->nocase; | |
3940 | vol_info->local_lease = master_tcon->local_lease; | |
3941 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
3942 | ||
8a8798a5 JL |
3943 | rc = cifs_set_vol_auth(vol_info, master_tcon->ses); |
3944 | if (rc) { | |
3945 | tcon = ERR_PTR(rc); | |
3946 | goto out; | |
3947 | } | |
9d002df4 JL |
3948 | |
3949 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 3950 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 3951 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 3952 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
3953 | |
3954 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
3955 | if (IS_ERR(ses)) { | |
96daf2b0 | 3956 | tcon = (struct cifs_tcon *)ses; |
9d002df4 JL |
3957 | cifs_put_tcp_session(master_tcon->ses->server); |
3958 | goto out; | |
3959 | } | |
3960 | ||
3961 | tcon = cifs_get_tcon(ses, vol_info); | |
3962 | if (IS_ERR(tcon)) { | |
3963 | cifs_put_smb_ses(ses); | |
3964 | goto out; | |
3965 | } | |
3966 | ||
29e20f9c | 3967 | if (cap_unix(ses)) |
9d002df4 JL |
3968 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); |
3969 | out: | |
8a8798a5 JL |
3970 | kfree(vol_info->username); |
3971 | kfree(vol_info->password); | |
9d002df4 JL |
3972 | kfree(vol_info); |
3973 | ||
3974 | return tcon; | |
3975 | } | |
3976 | ||
96daf2b0 | 3977 | struct cifs_tcon * |
9d002df4 JL |
3978 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) |
3979 | { | |
3980 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
3981 | } | |
3982 | ||
3983 | static int | |
3984 | cifs_sb_tcon_pending_wait(void *unused) | |
3985 | { | |
3986 | schedule(); | |
3987 | return signal_pending(current) ? -ERESTARTSYS : 0; | |
3988 | } | |
3989 | ||
b647c35f JL |
3990 | /* find and return a tlink with given uid */ |
3991 | static struct tcon_link * | |
3992 | tlink_rb_search(struct rb_root *root, uid_t uid) | |
3993 | { | |
3994 | struct rb_node *node = root->rb_node; | |
3995 | struct tcon_link *tlink; | |
3996 | ||
3997 | while (node) { | |
3998 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3999 | ||
4000 | if (tlink->tl_uid > uid) | |
4001 | node = node->rb_left; | |
4002 | else if (tlink->tl_uid < uid) | |
4003 | node = node->rb_right; | |
4004 | else | |
4005 | return tlink; | |
4006 | } | |
4007 | return NULL; | |
4008 | } | |
4009 | ||
4010 | /* insert a tcon_link into the tree */ | |
4011 | static void | |
4012 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
4013 | { | |
4014 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
4015 | struct tcon_link *tlink; | |
4016 | ||
4017 | while (*new) { | |
4018 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
4019 | parent = *new; | |
4020 | ||
4021 | if (tlink->tl_uid > new_tlink->tl_uid) | |
4022 | new = &((*new)->rb_left); | |
4023 | else | |
4024 | new = &((*new)->rb_right); | |
4025 | } | |
4026 | ||
4027 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
4028 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
4029 | } | |
4030 | ||
9d002df4 JL |
4031 | /* |
4032 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
4033 | * current task. | |
4034 | * | |
4035 | * If the superblock doesn't refer to a multiuser mount, then just return | |
4036 | * the master tcon for the mount. | |
4037 | * | |
6ef933a3 | 4038 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
4039 | * exists, then check to see if it's pending construction. If it is then wait |
4040 | * for construction to complete. Once it's no longer pending, check to see if | |
4041 | * it failed and either return an error or retry construction, depending on | |
4042 | * the timeout. | |
4043 | * | |
4044 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
4045 | * try to construct a new one. | |
4046 | */ | |
4047 | struct tcon_link * | |
4048 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
4049 | { | |
4050 | int ret; | |
b647c35f | 4051 | uid_t fsuid = current_fsuid(); |
9d002df4 JL |
4052 | struct tcon_link *tlink, *newtlink; |
4053 | ||
4054 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
4055 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
4056 | ||
4057 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 4058 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4059 | if (tlink) |
4060 | cifs_get_tlink(tlink); | |
4061 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4062 | ||
4063 | if (tlink == NULL) { | |
4064 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
4065 | if (newtlink == NULL) | |
4066 | return ERR_PTR(-ENOMEM); | |
b647c35f | 4067 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
4068 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
4069 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
4070 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
4071 | cifs_get_tlink(newtlink); | |
4072 | ||
9d002df4 JL |
4073 | spin_lock(&cifs_sb->tlink_tree_lock); |
4074 | /* was one inserted after previous search? */ | |
b647c35f | 4075 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4076 | if (tlink) { |
4077 | cifs_get_tlink(tlink); | |
4078 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4079 | kfree(newtlink); |
4080 | goto wait_for_construction; | |
4081 | } | |
9d002df4 | 4082 | tlink = newtlink; |
b647c35f JL |
4083 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
4084 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4085 | } else { |
4086 | wait_for_construction: | |
4087 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
4088 | cifs_sb_tcon_pending_wait, | |
4089 | TASK_INTERRUPTIBLE); | |
4090 | if (ret) { | |
4091 | cifs_put_tlink(tlink); | |
4092 | return ERR_PTR(ret); | |
4093 | } | |
4094 | ||
4095 | /* if it's good, return it */ | |
4096 | if (!IS_ERR(tlink->tl_tcon)) | |
4097 | return tlink; | |
4098 | ||
4099 | /* return error if we tried this already recently */ | |
4100 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
4101 | cifs_put_tlink(tlink); | |
4102 | return ERR_PTR(-EACCES); | |
4103 | } | |
4104 | ||
4105 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
4106 | goto wait_for_construction; | |
4107 | } | |
4108 | ||
4109 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
4110 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
4111 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
4112 | ||
4113 | if (IS_ERR(tlink->tl_tcon)) { | |
4114 | cifs_put_tlink(tlink); | |
4115 | return ERR_PTR(-EACCES); | |
4116 | } | |
4117 | ||
4118 | return tlink; | |
4119 | } | |
2de970ff JL |
4120 | |
4121 | /* | |
4122 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
4123 | * out tcons. | |
4124 | */ | |
4125 | static void | |
4126 | cifs_prune_tlinks(struct work_struct *work) | |
4127 | { | |
4128 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
4129 | prune_tlinks.work); | |
b647c35f JL |
4130 | struct rb_root *root = &cifs_sb->tlink_tree; |
4131 | struct rb_node *node = rb_first(root); | |
4132 | struct rb_node *tmp; | |
4133 | struct tcon_link *tlink; | |
2de970ff | 4134 | |
b647c35f JL |
4135 | /* |
4136 | * Because we drop the spinlock in the loop in order to put the tlink | |
4137 | * it's not guarded against removal of links from the tree. The only | |
4138 | * places that remove entries from the tree are this function and | |
4139 | * umounts. Because this function is non-reentrant and is canceled | |
4140 | * before umount can proceed, this is safe. | |
4141 | */ | |
4142 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4143 | node = rb_first(root); | |
4144 | while (node != NULL) { | |
4145 | tmp = node; | |
4146 | node = rb_next(tmp); | |
4147 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
4148 | ||
4149 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
4150 | atomic_read(&tlink->tl_count) != 0 || | |
4151 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
4152 | continue; | |
2de970ff | 4153 | |
b647c35f JL |
4154 | cifs_get_tlink(tlink); |
4155 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4156 | rb_erase(tmp, root); | |
4157 | ||
4158 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4159 | cifs_put_tlink(tlink); | |
4160 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4161 | } | |
4162 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff | 4163 | |
da472fc8 | 4164 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
4165 | TLINK_IDLE_EXPIRE); |
4166 | } |