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1da177e4 LT |
1 | /* |
2 | * fs/cifs/connect.c | |
3 | * | |
1080ef75 | 4 | * Copyright (C) International Business Machines Corp., 2002,2011 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
fb8c4b14 | 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
1da177e4 LT |
20 | */ |
21 | #include <linux/fs.h> | |
22 | #include <linux/net.h> | |
23 | #include <linux/string.h> | |
24 | #include <linux/list.h> | |
25 | #include <linux/wait.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
1da177e4 LT |
27 | #include <linux/pagemap.h> |
28 | #include <linux/ctype.h> | |
29 | #include <linux/utsname.h> | |
30 | #include <linux/mempool.h> | |
b8643e1b | 31 | #include <linux/delay.h> |
f191401f | 32 | #include <linux/completion.h> |
aaf737ad | 33 | #include <linux/kthread.h> |
0ae0efad | 34 | #include <linux/pagevec.h> |
7dfb7103 | 35 | #include <linux/freezer.h> |
5c2503a8 | 36 | #include <linux/namei.h> |
1da177e4 LT |
37 | #include <asm/uaccess.h> |
38 | #include <asm/processor.h> | |
50b64e3b | 39 | #include <linux/inet.h> |
143cb494 | 40 | #include <linux/module.h> |
8a8798a5 | 41 | #include <keys/user-type.h> |
0e2bedaa | 42 | #include <net/ipv6.h> |
8830d7e0 SP |
43 | #include <linux/parser.h> |
44 | ||
1da177e4 LT |
45 | #include "cifspdu.h" |
46 | #include "cifsglob.h" | |
47 | #include "cifsproto.h" | |
48 | #include "cifs_unicode.h" | |
49 | #include "cifs_debug.h" | |
50 | #include "cifs_fs_sb.h" | |
51 | #include "ntlmssp.h" | |
52 | #include "nterr.h" | |
53 | #include "rfc1002pdu.h" | |
488f1d2d | 54 | #include "fscache.h" |
1da177e4 LT |
55 | |
56 | #define CIFS_PORT 445 | |
57 | #define RFC1001_PORT 139 | |
58 | ||
1da177e4 LT |
59 | extern mempool_t *cifs_req_poolp; |
60 | ||
2de970ff | 61 | /* FIXME: should these be tunable? */ |
9d002df4 | 62 | #define TLINK_ERROR_EXPIRE (1 * HZ) |
2de970ff | 63 | #define TLINK_IDLE_EXPIRE (600 * HZ) |
9d002df4 | 64 | |
8830d7e0 SP |
65 | enum { |
66 | ||
67 | /* Mount options that take no arguments */ | |
68 | Opt_user_xattr, Opt_nouser_xattr, | |
69 | Opt_forceuid, Opt_noforceuid, | |
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, |
a0b3df5c | 88 | Opt_multiuser, Opt_sloppy, Opt_nosharesock, |
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, | |
73a999fa | 98 | Opt_domain, Opt_srcaddr, Opt_iocharset, |
8830d7e0 | 99 | Opt_netbiosname, Opt_servern, |
23db65f5 | 100 | Opt_ver, Opt_vers, Opt_sec, Opt_cache, |
8830d7e0 SP |
101 | |
102 | /* Mount options to be ignored */ | |
103 | Opt_ignore, | |
104 | ||
105 | /* Options which could be blank */ | |
106 | Opt_blank_pass, | |
4fe9e963 SP |
107 | Opt_blank_user, |
108 | Opt_blank_ip, | |
8830d7e0 SP |
109 | |
110 | Opt_err | |
111 | }; | |
112 | ||
113 | static const match_table_t cifs_mount_option_tokens = { | |
114 | ||
115 | { Opt_user_xattr, "user_xattr" }, | |
116 | { Opt_nouser_xattr, "nouser_xattr" }, | |
117 | { Opt_forceuid, "forceuid" }, | |
118 | { Opt_noforceuid, "noforceuid" }, | |
72bd481f JL |
119 | { Opt_forcegid, "forcegid" }, |
120 | { Opt_noforcegid, "noforcegid" }, | |
8830d7e0 SP |
121 | { Opt_noblocksend, "noblocksend" }, |
122 | { Opt_noautotune, "noautotune" }, | |
123 | { Opt_hard, "hard" }, | |
124 | { Opt_soft, "soft" }, | |
125 | { Opt_perm, "perm" }, | |
126 | { Opt_noperm, "noperm" }, | |
127 | { Opt_mapchars, "mapchars" }, | |
128 | { Opt_nomapchars, "nomapchars" }, | |
129 | { Opt_sfu, "sfu" }, | |
130 | { Opt_nosfu, "nosfu" }, | |
131 | { Opt_nodfs, "nodfs" }, | |
132 | { Opt_posixpaths, "posixpaths" }, | |
133 | { Opt_noposixpaths, "noposixpaths" }, | |
134 | { Opt_nounix, "nounix" }, | |
135 | { Opt_nounix, "nolinux" }, | |
136 | { Opt_nocase, "nocase" }, | |
137 | { Opt_nocase, "ignorecase" }, | |
138 | { Opt_brl, "brl" }, | |
139 | { Opt_nobrl, "nobrl" }, | |
140 | { Opt_nobrl, "nolock" }, | |
141 | { Opt_forcemandatorylock, "forcemandatorylock" }, | |
5cfdddcf | 142 | { Opt_forcemandatorylock, "forcemand" }, |
8830d7e0 SP |
143 | { Opt_setuids, "setuids" }, |
144 | { Opt_nosetuids, "nosetuids" }, | |
145 | { Opt_dynperm, "dynperm" }, | |
146 | { Opt_nodynperm, "nodynperm" }, | |
147 | { Opt_nohard, "nohard" }, | |
148 | { Opt_nosoft, "nosoft" }, | |
149 | { Opt_nointr, "nointr" }, | |
150 | { Opt_intr, "intr" }, | |
151 | { Opt_nostrictsync, "nostrictsync" }, | |
152 | { Opt_strictsync, "strictsync" }, | |
153 | { Opt_serverino, "serverino" }, | |
154 | { Opt_noserverino, "noserverino" }, | |
155 | { Opt_rwpidforward, "rwpidforward" }, | |
156 | { Opt_cifsacl, "cifsacl" }, | |
157 | { Opt_nocifsacl, "nocifsacl" }, | |
158 | { Opt_acl, "acl" }, | |
159 | { Opt_noacl, "noacl" }, | |
160 | { Opt_locallease, "locallease" }, | |
161 | { Opt_sign, "sign" }, | |
162 | { Opt_seal, "seal" }, | |
8830d7e0 SP |
163 | { Opt_noac, "noac" }, |
164 | { Opt_fsc, "fsc" }, | |
165 | { Opt_mfsymlinks, "mfsymlinks" }, | |
166 | { Opt_multiuser, "multiuser" }, | |
d8162558 | 167 | { Opt_sloppy, "sloppy" }, |
a0b3df5c | 168 | { Opt_nosharesock, "nosharesock" }, |
8830d7e0 SP |
169 | |
170 | { Opt_backupuid, "backupuid=%s" }, | |
171 | { Opt_backupgid, "backupgid=%s" }, | |
172 | { Opt_uid, "uid=%s" }, | |
173 | { Opt_cruid, "cruid=%s" }, | |
174 | { Opt_gid, "gid=%s" }, | |
175 | { Opt_file_mode, "file_mode=%s" }, | |
176 | { Opt_dirmode, "dirmode=%s" }, | |
177 | { Opt_dirmode, "dir_mode=%s" }, | |
178 | { Opt_port, "port=%s" }, | |
179 | { Opt_rsize, "rsize=%s" }, | |
180 | { Opt_wsize, "wsize=%s" }, | |
181 | { Opt_actimeo, "actimeo=%s" }, | |
182 | ||
4fe9e963 SP |
183 | { Opt_blank_user, "user=" }, |
184 | { Opt_blank_user, "username=" }, | |
8830d7e0 SP |
185 | { Opt_user, "user=%s" }, |
186 | { Opt_user, "username=%s" }, | |
187 | { Opt_blank_pass, "pass=" }, | |
3c15b4cf | 188 | { Opt_blank_pass, "password=" }, |
8830d7e0 SP |
189 | { Opt_pass, "pass=%s" }, |
190 | { Opt_pass, "password=%s" }, | |
4fe9e963 SP |
191 | { Opt_blank_ip, "ip=" }, |
192 | { Opt_blank_ip, "addr=" }, | |
8830d7e0 SP |
193 | { Opt_ip, "ip=%s" }, |
194 | { Opt_ip, "addr=%s" }, | |
73a999fa JL |
195 | { Opt_ignore, "unc=%s" }, |
196 | { Opt_ignore, "target=%s" }, | |
197 | { Opt_ignore, "path=%s" }, | |
8830d7e0 SP |
198 | { Opt_domain, "dom=%s" }, |
199 | { Opt_domain, "domain=%s" }, | |
200 | { Opt_domain, "workgroup=%s" }, | |
201 | { Opt_srcaddr, "srcaddr=%s" }, | |
73a999fa | 202 | { Opt_ignore, "prefixpath=%s" }, |
8830d7e0 | 203 | { Opt_iocharset, "iocharset=%s" }, |
8830d7e0 SP |
204 | { Opt_netbiosname, "netbiosname=%s" }, |
205 | { Opt_servern, "servern=%s" }, | |
206 | { Opt_ver, "ver=%s" }, | |
23db65f5 | 207 | { Opt_vers, "vers=%s" }, |
8830d7e0 | 208 | { Opt_sec, "sec=%s" }, |
15b6a473 | 209 | { Opt_cache, "cache=%s" }, |
8830d7e0 SP |
210 | |
211 | { Opt_ignore, "cred" }, | |
212 | { Opt_ignore, "credentials" }, | |
a557b976 JL |
213 | { Opt_ignore, "cred=%s" }, |
214 | { Opt_ignore, "credentials=%s" }, | |
8830d7e0 SP |
215 | { Opt_ignore, "guest" }, |
216 | { Opt_ignore, "rw" }, | |
217 | { Opt_ignore, "ro" }, | |
218 | { Opt_ignore, "suid" }, | |
219 | { Opt_ignore, "nosuid" }, | |
220 | { Opt_ignore, "exec" }, | |
221 | { Opt_ignore, "noexec" }, | |
222 | { Opt_ignore, "nodev" }, | |
223 | { Opt_ignore, "noauto" }, | |
224 | { Opt_ignore, "dev" }, | |
225 | { Opt_ignore, "mand" }, | |
226 | { Opt_ignore, "nomand" }, | |
227 | { Opt_ignore, "_netdev" }, | |
228 | ||
229 | { Opt_err, NULL } | |
230 | }; | |
231 | ||
232 | enum { | |
233 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
234 | Opt_sec_ntlmsspi, Opt_sec_ntlmssp, | |
7659624f JL |
235 | Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2, |
236 | Opt_sec_ntlmv2i, Opt_sec_lanman, | |
8830d7e0 SP |
237 | Opt_sec_none, |
238 | ||
239 | Opt_sec_err | |
240 | }; | |
241 | ||
242 | static const match_table_t cifs_secflavor_tokens = { | |
243 | { Opt_sec_krb5, "krb5" }, | |
244 | { Opt_sec_krb5i, "krb5i" }, | |
245 | { Opt_sec_krb5p, "krb5p" }, | |
246 | { Opt_sec_ntlmsspi, "ntlmsspi" }, | |
247 | { Opt_sec_ntlmssp, "ntlmssp" }, | |
248 | { Opt_ntlm, "ntlm" }, | |
249 | { Opt_sec_ntlmi, "ntlmi" }, | |
7659624f JL |
250 | { Opt_sec_ntlmv2, "nontlm" }, |
251 | { Opt_sec_ntlmv2, "ntlmv2" }, | |
8830d7e0 | 252 | { Opt_sec_ntlmv2i, "ntlmv2i" }, |
8830d7e0 SP |
253 | { Opt_sec_lanman, "lanman" }, |
254 | { Opt_sec_none, "none" }, | |
255 | ||
256 | { Opt_sec_err, NULL } | |
257 | }; | |
258 | ||
15b6a473 JL |
259 | /* cache flavors */ |
260 | enum { | |
261 | Opt_cache_loose, | |
262 | Opt_cache_strict, | |
263 | Opt_cache_none, | |
264 | Opt_cache_err | |
265 | }; | |
266 | ||
267 | static const match_table_t cifs_cacheflavor_tokens = { | |
268 | { Opt_cache_loose, "loose" }, | |
269 | { Opt_cache_strict, "strict" }, | |
270 | { Opt_cache_none, "none" }, | |
271 | { Opt_cache_err, NULL } | |
272 | }; | |
273 | ||
23db65f5 JL |
274 | static const match_table_t cifs_smb_version_tokens = { |
275 | { Smb_1, SMB1_VERSION_STRING }, | |
dd446b16 | 276 | { Smb_20, SMB20_VERSION_STRING}, |
1080ef75 | 277 | { Smb_21, SMB21_VERSION_STRING }, |
e4aa25e7 | 278 | { Smb_30, SMB30_VERSION_STRING }, |
20b6d8b4 | 279 | { Smb_302, SMB302_VERSION_STRING }, |
23db65f5 JL |
280 | }; |
281 | ||
a9f1b85e PS |
282 | static int ip_connect(struct TCP_Server_Info *server); |
283 | static int generic_ip_connect(struct TCP_Server_Info *server); | |
b647c35f | 284 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
2de970ff | 285 | static void cifs_prune_tlinks(struct work_struct *work); |
b9bce2e9 JL |
286 | static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
287 | const char *devname); | |
1da177e4 | 288 | |
d5c5605c JL |
289 | /* |
290 | * cifs tcp session reconnection | |
291 | * | |
292 | * mark tcp session as reconnecting so temporarily locked | |
293 | * mark all smb sessions as reconnecting for tcp session | |
294 | * reconnect tcp session | |
295 | * wake up waiters on reconnection? - (not needed currently) | |
296 | */ | |
28ea5290 | 297 | int |
1da177e4 LT |
298 | cifs_reconnect(struct TCP_Server_Info *server) |
299 | { | |
300 | int rc = 0; | |
f1987b44 | 301 | struct list_head *tmp, *tmp2; |
96daf2b0 SF |
302 | struct cifs_ses *ses; |
303 | struct cifs_tcon *tcon; | |
fb8c4b14 | 304 | struct mid_q_entry *mid_entry; |
3c1105df | 305 | struct list_head retry_list; |
50c2f753 | 306 | |
1da177e4 | 307 | spin_lock(&GlobalMid_Lock); |
469ee614 | 308 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 309 | /* the demux thread will exit normally |
1da177e4 LT |
310 | next time through the loop */ |
311 | spin_unlock(&GlobalMid_Lock); | |
312 | return rc; | |
313 | } else | |
314 | server->tcpStatus = CifsNeedReconnect; | |
315 | spin_unlock(&GlobalMid_Lock); | |
316 | server->maxBuf = 0; | |
aa24d1e9 PS |
317 | #ifdef CONFIG_CIFS_SMB2 |
318 | server->max_read = 0; | |
319 | #endif | |
1da177e4 | 320 | |
f96637be | 321 | cifs_dbg(FYI, "Reconnecting tcp session\n"); |
1da177e4 LT |
322 | |
323 | /* before reconnecting the tcp session, mark the smb session (uid) | |
324 | and the tid bad so they are not used until reconnected */ | |
f96637be JP |
325 | cifs_dbg(FYI, "%s: marking sessions and tcons for reconnect\n", |
326 | __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 */ |
f96637be | 340 | cifs_dbg(FYI, "%s: tearing down socket\n", __func__); |
72ca545b | 341 | mutex_lock(&server->srv_mutex); |
fb8c4b14 | 342 | if (server->ssocket) { |
f96637be JP |
343 | cifs_dbg(FYI, "State: 0x%x Flags: 0x%lx\n", |
344 | server->ssocket->state, server->ssocket->flags); | |
91cf45f0 | 345 | kernel_sock_shutdown(server->ssocket, SHUT_WR); |
f96637be JP |
346 | cifs_dbg(FYI, "Post shutdown state: 0x%x Flags: 0x%lx\n", |
347 | server->ssocket->state, server->ssocket->flags); | |
1da177e4 LT |
348 | sock_release(server->ssocket); |
349 | server->ssocket = NULL; | |
350 | } | |
5d0d2882 SP |
351 | server->sequence_number = 0; |
352 | server->session_estab = false; | |
21e73393 SP |
353 | kfree(server->session_key.response); |
354 | server->session_key.response = NULL; | |
355 | server->session_key.len = 0; | |
fda35943 | 356 | server->lstrp = jiffies; |
2b84a36c | 357 | mutex_unlock(&server->srv_mutex); |
1da177e4 | 358 | |
2b84a36c | 359 | /* mark submitted MIDs for retry and issue callback */ |
3c1105df | 360 | INIT_LIST_HEAD(&retry_list); |
f96637be | 361 | cifs_dbg(FYI, "%s: moving mids to private list\n", __func__); |
1da177e4 | 362 | spin_lock(&GlobalMid_Lock); |
2b84a36c JL |
363 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
364 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 PS |
365 | if (mid_entry->mid_state == MID_REQUEST_SUBMITTED) |
366 | mid_entry->mid_state = MID_RETRY_NEEDED; | |
3c1105df JL |
367 | list_move(&mid_entry->qhead, &retry_list); |
368 | } | |
369 | spin_unlock(&GlobalMid_Lock); | |
370 | ||
f96637be | 371 | cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__); |
3c1105df JL |
372 | list_for_each_safe(tmp, tmp2, &retry_list) { |
373 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
2b84a36c JL |
374 | list_del_init(&mid_entry->qhead); |
375 | mid_entry->callback(mid_entry); | |
1da177e4 | 376 | } |
1da177e4 | 377 | |
7fdbaa1b | 378 | do { |
6c3d8909 | 379 | try_to_freeze(); |
a9f1b85e PS |
380 | |
381 | /* we should try only the port we connected to before */ | |
73e216a8 | 382 | mutex_lock(&server->srv_mutex); |
a9f1b85e | 383 | rc = generic_ip_connect(server); |
fb8c4b14 | 384 | if (rc) { |
f96637be | 385 | cifs_dbg(FYI, "reconnect error %d\n", 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 | } |
73e216a8 | 394 | mutex_unlock(&server->srv_mutex); |
7fdbaa1b | 395 | } while (server->tcpStatus == CifsNeedReconnect); |
2b84a36c | 396 | |
1da177e4 LT |
397 | return rc; |
398 | } | |
399 | ||
c74093b6 JL |
400 | static void |
401 | cifs_echo_request(struct work_struct *work) | |
402 | { | |
403 | int rc; | |
404 | struct TCP_Server_Info *server = container_of(work, | |
405 | struct TCP_Server_Info, echo.work); | |
406 | ||
247ec9b4 | 407 | /* |
f6d76178 PS |
408 | * We cannot send an echo if it is disabled or until the |
409 | * NEGOTIATE_PROTOCOL request is done, which is indicated by | |
410 | * server->ops->need_neg() == true. Also, no need to ping if | |
411 | * we got a response recently. | |
247ec9b4 | 412 | */ |
286170aa | 413 | if (!server->ops->need_neg || server->ops->need_neg(server) || |
f6d76178 | 414 | (server->ops->can_echo && !server->ops->can_echo(server)) || |
247ec9b4 | 415 | time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ)) |
c74093b6 JL |
416 | goto requeue_echo; |
417 | ||
f6d76178 | 418 | rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS; |
c74093b6 | 419 | if (rc) |
f96637be JP |
420 | cifs_dbg(FYI, "Unable to send echo request to server: %s\n", |
421 | server->hostname); | |
c74093b6 JL |
422 | |
423 | requeue_echo: | |
da472fc8 | 424 | queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL); |
c74093b6 JL |
425 | } |
426 | ||
3d9c2472 | 427 | static bool |
2a37ef94 | 428 | allocate_buffers(struct TCP_Server_Info *server) |
3d9c2472 | 429 | { |
2a37ef94 JL |
430 | if (!server->bigbuf) { |
431 | server->bigbuf = (char *)cifs_buf_get(); | |
432 | if (!server->bigbuf) { | |
f96637be | 433 | cifs_dbg(VFS, "No memory for large SMB response\n"); |
3d9c2472 PS |
434 | msleep(3000); |
435 | /* retry will check if exiting */ | |
436 | return false; | |
437 | } | |
2a37ef94 | 438 | } else if (server->large_buf) { |
3d9c2472 | 439 | /* we are reusing a dirty large buf, clear its start */ |
1887f601 | 440 | memset(server->bigbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
441 | } |
442 | ||
2a37ef94 JL |
443 | if (!server->smallbuf) { |
444 | server->smallbuf = (char *)cifs_small_buf_get(); | |
445 | if (!server->smallbuf) { | |
f96637be | 446 | cifs_dbg(VFS, "No memory for SMB response\n"); |
3d9c2472 PS |
447 | msleep(1000); |
448 | /* retry will check if exiting */ | |
449 | return false; | |
450 | } | |
451 | /* beginning of smb buffer is cleared in our buf_get */ | |
452 | } else { | |
453 | /* if existing small buf clear beginning */ | |
1887f601 | 454 | memset(server->smallbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
455 | } |
456 | ||
3d9c2472 PS |
457 | return true; |
458 | } | |
459 | ||
ba749e6d JL |
460 | static bool |
461 | server_unresponsive(struct TCP_Server_Info *server) | |
462 | { | |
6dae51a5 PS |
463 | /* |
464 | * We need to wait 2 echo intervals to make sure we handle such | |
465 | * situations right: | |
466 | * 1s client sends a normal SMB request | |
467 | * 2s client gets a response | |
468 | * 30s echo workqueue job pops, and decides we got a response recently | |
469 | * and don't need to send another | |
470 | * ... | |
471 | * 65s kernel_recvmsg times out, and we see that we haven't gotten | |
472 | * a response in >60s. | |
473 | */ | |
474 | if (server->tcpStatus == CifsGood && | |
475 | time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) { | |
f96637be JP |
476 | cifs_dbg(VFS, "Server %s has not responded in %d seconds. Reconnecting...\n", |
477 | server->hostname, (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)) { |
3fabaa27 | 560 | total_read = -ECONNABORTED; |
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); | |
3fabaa27 | 574 | total_read = -ECONNABORTED; |
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) { |
f96637be JP |
588 | cifs_dbg(FYI, "Received no data or error: expecting %d\n" |
589 | "got %d", to_read, length); | |
e7015fb1 | 590 | cifs_reconnect(server); |
3fabaa27 | 591 | total_read = -ECONNABORTED; |
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: | |
f96637be | 623 | cifs_dbg(FYI, "RFC 1002 session keep alive\n"); |
fe11e4cc JL |
624 | break; |
625 | case RFC1002_POSITIVE_SESSION_RESPONSE: | |
f96637be | 626 | cifs_dbg(FYI, "RFC 1002 positive session response\n"); |
fe11e4cc JL |
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 | */ | |
f96637be | 633 | cifs_dbg(FYI, "RFC 1002 negative session response\n"); |
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: | |
f96637be | 647 | cifs_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", 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); | |
f96637be | 733 | cifs_dbg(FYI, "Clearing mid 0x%llx\n", mid_entry->mid); |
7c9421e1 | 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); | |
f96637be | 742 | cifs_dbg(FYI, "Callback mid 0x%llx\n", 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 | */ | |
f96637be | 759 | cifs_dbg(FYI, "Wait for exit from demultiplex thread\n"); |
762dfd10 PS |
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) { |
f96637be | 786 | cifs_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length); |
e9097ab4 JL |
787 | cifs_reconnect(server); |
788 | wake_up(&server->response_q); | |
3fabaa27 | 789 | return -ECONNABORTED; |
e9097ab4 JL |
790 | } |
791 | ||
792 | /* switch to large buffer if too big for a small one */ | |
793 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { | |
794 | server->large_buf = true; | |
d4e4854f | 795 | memcpy(server->bigbuf, buf, server->total_read); |
e9097ab4 | 796 | buf = server->bigbuf; |
e9097ab4 JL |
797 | } |
798 | ||
799 | /* now read the rest */ | |
1887f601 PS |
800 | length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, |
801 | pdu_length - HEADER_SIZE(server) + 1 + 4); | |
e9097ab4 JL |
802 | if (length < 0) |
803 | return length; | |
804 | server->total_read += length; | |
805 | ||
d4e4854f | 806 | dump_smb(buf, server->total_read); |
e9097ab4 JL |
807 | |
808 | /* | |
809 | * We know that we received enough to get to the MID as we | |
810 | * checked the pdu_length earlier. Now check to see | |
811 | * if the rest of the header is OK. We borrow the length | |
812 | * var for the rest of the loop to avoid a new stack var. | |
813 | * | |
814 | * 48 bytes is enough to display the header and a little bit | |
815 | * into the payload for debugging purposes. | |
816 | */ | |
8aa26f3e | 817 | length = server->ops->check_message(buf, server->total_read); |
e9097ab4 JL |
818 | if (length != 0) |
819 | cifs_dump_mem("Bad SMB: ", buf, | |
820 | min_t(unsigned int, server->total_read, 48)); | |
821 | ||
2e44b288 PS |
822 | if (server->ops->is_status_pending && |
823 | server->ops->is_status_pending(buf, server, length)) | |
824 | return -1; | |
825 | ||
ff4fa4a2 JL |
826 | if (!mid) |
827 | return length; | |
e9097ab4 | 828 | |
d4e4854f | 829 | handle_mid(mid, server, buf, length); |
ff4fa4a2 | 830 | return 0; |
e9097ab4 JL |
831 | } |
832 | ||
1da177e4 | 833 | static int |
7c97c200 | 834 | cifs_demultiplex_thread(void *p) |
1da177e4 LT |
835 | { |
836 | int length; | |
7c97c200 | 837 | struct TCP_Server_Info *server = p; |
2a37ef94 JL |
838 | unsigned int pdu_length; |
839 | char *buf = NULL; | |
1da177e4 LT |
840 | struct task_struct *task_to_wake = NULL; |
841 | struct mid_q_entry *mid_entry; | |
1da177e4 | 842 | |
1da177e4 | 843 | current->flags |= PF_MEMALLOC; |
f96637be | 844 | cifs_dbg(FYI, "Demultiplex PID: %d\n", task_pid_nr(current)); |
93d0ec85 JL |
845 | |
846 | length = atomic_inc_return(&tcpSesAllocCount); | |
847 | if (length > 1) | |
26f57364 SF |
848 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, |
849 | GFP_KERNEL); | |
1da177e4 | 850 | |
83144186 | 851 | set_freezable(); |
469ee614 | 852 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
853 | if (try_to_freeze()) |
854 | continue; | |
b8643e1b | 855 | |
2a37ef94 | 856 | if (!allocate_buffers(server)) |
3d9c2472 | 857 | continue; |
b8643e1b | 858 | |
2a37ef94 | 859 | server->large_buf = false; |
2a37ef94 | 860 | buf = server->smallbuf; |
f01d5e14 | 861 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 862 | |
e28bc5b1 | 863 | length = cifs_read_from_socket(server, buf, pdu_length); |
a52c1eb7 | 864 | if (length < 0) |
1da177e4 | 865 | continue; |
2a37ef94 | 866 | server->total_read = length; |
1da177e4 | 867 | |
98bac62c PS |
868 | /* |
869 | * The right amount was read from socket - 4 bytes, | |
870 | * so we can now interpret the length field. | |
871 | */ | |
d4e4854f | 872 | pdu_length = get_rfc1002_length(buf); |
70ca734a | 873 | |
f96637be | 874 | cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length); |
fe11e4cc | 875 | if (!is_smb_response(server, buf[0])) |
fb8c4b14 | 876 | continue; |
e4eb295d | 877 | |
89482a56 | 878 | /* make sure we have enough to get to the MID */ |
1887f601 | 879 | if (pdu_length < HEADER_SIZE(server) - 1 - 4) { |
f96637be JP |
880 | cifs_dbg(VFS, "SMB response too short (%u bytes)\n", |
881 | pdu_length); | |
89482a56 JL |
882 | cifs_reconnect(server); |
883 | wake_up(&server->response_q); | |
884 | continue; | |
e4eb295d | 885 | } |
e7015fb1 | 886 | |
89482a56 | 887 | /* read down to the MID */ |
e28bc5b1 | 888 | length = cifs_read_from_socket(server, buf + 4, |
1887f601 | 889 | HEADER_SIZE(server) - 1 - 4); |
89482a56 | 890 | if (length < 0) |
e4eb295d | 891 | continue; |
2a37ef94 | 892 | server->total_read += length; |
1da177e4 | 893 | |
8aa26f3e | 894 | mid_entry = server->ops->find_mid(server, buf); |
50c2f753 | 895 | |
44d22d84 JL |
896 | if (!mid_entry || !mid_entry->receive) |
897 | length = standard_receive3(server, mid_entry); | |
898 | else | |
899 | length = mid_entry->receive(server, mid_entry); | |
71823baf | 900 | |
e9097ab4 | 901 | if (length < 0) |
fe11e4cc | 902 | continue; |
1da177e4 | 903 | |
d4e4854f | 904 | if (server->large_buf) |
2a37ef94 | 905 | buf = server->bigbuf; |
fda35943 | 906 | |
fda35943 | 907 | server->lstrp = jiffies; |
2b84a36c | 908 | if (mid_entry != NULL) { |
2a37ef94 JL |
909 | if (!mid_entry->multiRsp || mid_entry->multiEnd) |
910 | mid_entry->callback(mid_entry); | |
7f0adb53 PS |
911 | } else if (!server->ops->is_oplock_break || |
912 | !server->ops->is_oplock_break(buf, server)) { | |
f96637be JP |
913 | cifs_dbg(VFS, "No task to wake, unknown frame received! NumMids %d\n", |
914 | atomic_read(&midCount)); | |
1887f601 PS |
915 | cifs_dump_mem("Received Data is: ", buf, |
916 | HEADER_SIZE(server)); | |
3979877e | 917 | #ifdef CONFIG_CIFS_DEBUG2 |
7f0adb53 PS |
918 | if (server->ops->dump_detail) |
919 | server->ops->dump_detail(buf); | |
3979877e SF |
920 | cifs_dump_mids(server); |
921 | #endif /* CIFS_DEBUG2 */ | |
50c2f753 | 922 | |
e4eb295d SF |
923 | } |
924 | } /* end while !EXITING */ | |
925 | ||
fd62cb7e | 926 | /* buffer usually freed in free_mid - need to free it here on exit */ |
2a37ef94 JL |
927 | cifs_buf_release(server->bigbuf); |
928 | if (server->smallbuf) /* no sense logging a debug message if NULL */ | |
929 | cifs_small_buf_release(server->smallbuf); | |
1da177e4 | 930 | |
b1c8d2b4 | 931 | task_to_wake = xchg(&server->tsk, NULL); |
762dfd10 | 932 | clean_demultiplex_info(server); |
50c2f753 | 933 | |
b1c8d2b4 JL |
934 | /* if server->tsk was NULL then wait for a signal before exiting */ |
935 | if (!task_to_wake) { | |
936 | set_current_state(TASK_INTERRUPTIBLE); | |
937 | while (!signal_pending(current)) { | |
938 | schedule(); | |
939 | set_current_state(TASK_INTERRUPTIBLE); | |
940 | } | |
941 | set_current_state(TASK_RUNNING); | |
942 | } | |
943 | ||
0468a2cf | 944 | module_put_and_exit(0); |
1da177e4 LT |
945 | } |
946 | ||
c359cf3c JL |
947 | /* extract the host portion of the UNC string */ |
948 | static char * | |
949 | extract_hostname(const char *unc) | |
950 | { | |
951 | const char *src; | |
952 | char *dst, *delim; | |
953 | unsigned int len; | |
954 | ||
955 | /* skip double chars at beginning of string */ | |
956 | /* BB: check validity of these bytes? */ | |
957 | src = unc + 2; | |
958 | ||
959 | /* delimiter between hostname and sharename is always '\\' now */ | |
960 | delim = strchr(src, '\\'); | |
961 | if (!delim) | |
962 | return ERR_PTR(-EINVAL); | |
963 | ||
964 | len = delim - src; | |
965 | dst = kmalloc((len + 1), GFP_KERNEL); | |
966 | if (dst == NULL) | |
967 | return ERR_PTR(-ENOMEM); | |
968 | ||
969 | memcpy(dst, src, len); | |
970 | dst[len] = '\0'; | |
971 | ||
972 | return dst; | |
973 | } | |
974 | ||
8830d7e0 SP |
975 | static int get_option_ul(substring_t args[], unsigned long *option) |
976 | { | |
977 | int rc; | |
978 | char *string; | |
979 | ||
980 | string = match_strdup(args); | |
981 | if (string == NULL) | |
982 | return -ENOMEM; | |
bfa890a3 | 983 | rc = kstrtoul(string, 0, option); |
8830d7e0 SP |
984 | kfree(string); |
985 | ||
986 | return rc; | |
987 | } | |
988 | ||
3da46565 EB |
989 | static int get_option_uid(substring_t args[], kuid_t *result) |
990 | { | |
991 | unsigned long value; | |
992 | kuid_t uid; | |
993 | int rc; | |
994 | ||
995 | rc = get_option_ul(args, &value); | |
996 | if (rc) | |
997 | return rc; | |
998 | ||
999 | uid = make_kuid(current_user_ns(), value); | |
1000 | if (!uid_valid(uid)) | |
1001 | return -EINVAL; | |
1002 | ||
1003 | *result = uid; | |
1004 | return 0; | |
1005 | } | |
1006 | ||
1007 | static int get_option_gid(substring_t args[], kgid_t *result) | |
1008 | { | |
1009 | unsigned long value; | |
1010 | kgid_t gid; | |
1011 | int rc; | |
1012 | ||
1013 | rc = get_option_ul(args, &value); | |
1014 | if (rc) | |
1015 | return rc; | |
1016 | ||
1017 | gid = make_kgid(current_user_ns(), value); | |
1018 | if (!gid_valid(gid)) | |
1019 | return -EINVAL; | |
1020 | ||
1021 | *result = gid; | |
1022 | return 0; | |
1023 | } | |
8830d7e0 SP |
1024 | |
1025 | static int cifs_parse_security_flavors(char *value, | |
1026 | struct smb_vol *vol) | |
1027 | { | |
1028 | ||
1029 | substring_t args[MAX_OPT_ARGS]; | |
1030 | ||
1e3cc57e JL |
1031 | /* |
1032 | * With mount options, the last one should win. Reset any existing | |
1033 | * settings back to default. | |
1034 | */ | |
1035 | vol->sectype = Unspecified; | |
1036 | vol->sign = false; | |
1037 | ||
8830d7e0 | 1038 | switch (match_token(value, cifs_secflavor_tokens, args)) { |
3f618223 JL |
1039 | case Opt_sec_krb5p: |
1040 | cifs_dbg(VFS, "sec=krb5p is not supported!\n"); | |
1041 | return 1; | |
1042 | case Opt_sec_krb5i: | |
1043 | vol->sign = true; | |
1044 | /* Fallthrough */ | |
8830d7e0 | 1045 | case Opt_sec_krb5: |
1e3cc57e | 1046 | vol->sectype = Kerberos; |
8830d7e0 | 1047 | break; |
3f618223 | 1048 | case Opt_sec_ntlmsspi: |
1e3cc57e | 1049 | vol->sign = true; |
3f618223 | 1050 | /* Fallthrough */ |
8830d7e0 | 1051 | case Opt_sec_ntlmssp: |
1e3cc57e | 1052 | vol->sectype = RawNTLMSSP; |
8830d7e0 | 1053 | break; |
3f618223 | 1054 | case Opt_sec_ntlmi: |
1e3cc57e | 1055 | vol->sign = true; |
3f618223 | 1056 | /* Fallthrough */ |
8830d7e0 | 1057 | case Opt_ntlm: |
1e3cc57e | 1058 | vol->sectype = NTLM; |
8830d7e0 | 1059 | break; |
3f618223 | 1060 | case Opt_sec_ntlmv2i: |
1e3cc57e | 1061 | vol->sign = true; |
3f618223 | 1062 | /* Fallthrough */ |
7659624f | 1063 | case Opt_sec_ntlmv2: |
1e3cc57e | 1064 | vol->sectype = NTLMv2; |
8830d7e0 SP |
1065 | break; |
1066 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
1067 | case Opt_sec_lanman: | |
1e3cc57e | 1068 | vol->sectype = LANMAN; |
8830d7e0 SP |
1069 | break; |
1070 | #endif | |
1071 | case Opt_sec_none: | |
1072 | vol->nullauth = 1; | |
1073 | break; | |
1074 | default: | |
f96637be | 1075 | cifs_dbg(VFS, "bad security option: %s\n", value); |
8830d7e0 SP |
1076 | return 1; |
1077 | } | |
1078 | ||
1079 | return 0; | |
1080 | } | |
1081 | ||
15b6a473 JL |
1082 | static int |
1083 | cifs_parse_cache_flavor(char *value, struct smb_vol *vol) | |
1084 | { | |
1085 | substring_t args[MAX_OPT_ARGS]; | |
1086 | ||
1087 | switch (match_token(value, cifs_cacheflavor_tokens, args)) { | |
1088 | case Opt_cache_loose: | |
1089 | vol->direct_io = false; | |
1090 | vol->strict_io = false; | |
1091 | break; | |
1092 | case Opt_cache_strict: | |
1093 | vol->direct_io = false; | |
1094 | vol->strict_io = true; | |
1095 | break; | |
1096 | case Opt_cache_none: | |
1097 | vol->direct_io = true; | |
1098 | vol->strict_io = false; | |
1099 | break; | |
1100 | default: | |
f96637be | 1101 | cifs_dbg(VFS, "bad cache= option: %s\n", value); |
15b6a473 JL |
1102 | return 1; |
1103 | } | |
1104 | return 0; | |
1105 | } | |
1106 | ||
23db65f5 JL |
1107 | static int |
1108 | cifs_parse_smb_version(char *value, struct smb_vol *vol) | |
1109 | { | |
1110 | substring_t args[MAX_OPT_ARGS]; | |
1111 | ||
1112 | switch (match_token(value, cifs_smb_version_tokens, args)) { | |
1113 | case Smb_1: | |
1114 | vol->ops = &smb1_operations; | |
1115 | vol->vals = &smb1_values; | |
1116 | break; | |
1080ef75 | 1117 | #ifdef CONFIG_CIFS_SMB2 |
dd446b16 | 1118 | case Smb_20: |
53ef1016 | 1119 | vol->ops = &smb20_operations; |
dd446b16 SF |
1120 | vol->vals = &smb20_values; |
1121 | break; | |
1080ef75 SF |
1122 | case Smb_21: |
1123 | vol->ops = &smb21_operations; | |
1124 | vol->vals = &smb21_values; | |
1125 | break; | |
e4aa25e7 | 1126 | case Smb_30: |
38107d45 | 1127 | vol->ops = &smb30_operations; |
e4aa25e7 SF |
1128 | vol->vals = &smb30_values; |
1129 | break; | |
20b6d8b4 SF |
1130 | case Smb_302: |
1131 | vol->ops = &smb30_operations; /* currently identical with 3.0 */ | |
1132 | vol->vals = &smb302_values; | |
1133 | break; | |
1080ef75 | 1134 | #endif |
23db65f5 | 1135 | default: |
f96637be | 1136 | cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value); |
23db65f5 JL |
1137 | return 1; |
1138 | } | |
1139 | return 0; | |
1140 | } | |
1141 | ||
d387a5c5 JL |
1142 | /* |
1143 | * Parse a devname into substrings and populate the vol->UNC and vol->prepath | |
1144 | * fields with the result. Returns 0 on success and an error otherwise. | |
1145 | */ | |
1146 | static int | |
1147 | cifs_parse_devname(const char *devname, struct smb_vol *vol) | |
1148 | { | |
1149 | char *pos; | |
1150 | const char *delims = "/\\"; | |
1151 | size_t len; | |
1152 | ||
1153 | /* make sure we have a valid UNC double delimiter prefix */ | |
1154 | len = strspn(devname, delims); | |
1155 | if (len != 2) | |
1156 | return -EINVAL; | |
1157 | ||
1158 | /* find delimiter between host and sharename */ | |
1159 | pos = strpbrk(devname + 2, delims); | |
1160 | if (!pos) | |
1161 | return -EINVAL; | |
1162 | ||
1163 | /* skip past delimiter */ | |
1164 | ++pos; | |
1165 | ||
1166 | /* now go until next delimiter or end of string */ | |
1167 | len = strcspn(pos, delims); | |
1168 | ||
1169 | /* move "pos" up to delimiter or NULL */ | |
1170 | pos += len; | |
1171 | vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL); | |
1172 | if (!vol->UNC) | |
1173 | return -ENOMEM; | |
1174 | ||
1175 | convert_delimiter(vol->UNC, '\\'); | |
1176 | ||
1177 | /* If pos is NULL, or is a bogus trailing delimiter then no prepath */ | |
1178 | if (!*pos++ || !*pos) | |
1179 | return 0; | |
1180 | ||
1181 | vol->prepath = kstrdup(pos, GFP_KERNEL); | |
1182 | if (!vol->prepath) | |
1183 | return -ENOMEM; | |
1184 | ||
1185 | return 0; | |
1186 | } | |
1187 | ||
1da177e4 | 1188 | static int |
b946845a | 1189 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
50c2f753 | 1190 | struct smb_vol *vol) |
1da177e4 | 1191 | { |
8830d7e0 | 1192 | char *data, *end; |
957df453 | 1193 | char *mountdata_copy = NULL, *options; |
1da177e4 LT |
1194 | unsigned int temp_len, i, j; |
1195 | char separator[2]; | |
9b9d6b24 JL |
1196 | short int override_uid = -1; |
1197 | short int override_gid = -1; | |
1198 | bool uid_specified = false; | |
1199 | bool gid_specified = false; | |
d8162558 JL |
1200 | bool sloppy = false; |
1201 | char *invalid = NULL; | |
88463999 | 1202 | char *nodename = utsname()->nodename; |
8830d7e0 SP |
1203 | char *string = NULL; |
1204 | char *tmp_end, *value; | |
1205 | char delim; | |
b979aaa1 JL |
1206 | bool got_ip = false; |
1207 | unsigned short port = 0; | |
1208 | struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr; | |
1da177e4 LT |
1209 | |
1210 | separator[0] = ','; | |
50c2f753 | 1211 | separator[1] = 0; |
8830d7e0 | 1212 | delim = separator[0]; |
1da177e4 | 1213 | |
6ee9542a JL |
1214 | /* ensure we always start with zeroed-out smb_vol */ |
1215 | memset(vol, 0, sizeof(*vol)); | |
1216 | ||
88463999 JL |
1217 | /* |
1218 | * does not have to be perfect mapping since field is | |
1219 | * informational, only used for servers that do not support | |
1220 | * port 445 and it can be overridden at mount time | |
1221 | */ | |
1397f2ee JL |
1222 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
1223 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
1224 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
1225 | ||
1397f2ee | 1226 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
1227 | /* null target name indicates to use *SMBSERVR default called name |
1228 | if we end up sending RFC1001 session initialize */ | |
1229 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
1230 | vol->cred_uid = current_uid(); |
1231 | vol->linux_uid = current_uid(); | |
a001e5b5 | 1232 | vol->linux_gid = current_gid(); |
f55ed1a8 JL |
1233 | |
1234 | /* default to only allowing write access to owner of the mount */ | |
1235 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
1236 | |
1237 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
1238 | /* default is always to request posix paths. */ |
1239 | vol->posix_paths = 1; | |
a0c9217f JL |
1240 | /* default to using server inode numbers where available */ |
1241 | vol->server_ino = 1; | |
ac67055e | 1242 | |
1b359204 JL |
1243 | /* default is to use strict cifs caching semantics */ |
1244 | vol->strict_io = true; | |
1245 | ||
6d20e840 SJ |
1246 | vol->actimeo = CIFS_DEF_ACTIMEO; |
1247 | ||
23db65f5 JL |
1248 | /* FIXME: add autonegotiation -- for now, SMB1 is default */ |
1249 | vol->ops = &smb1_operations; | |
1250 | vol->vals = &smb1_values; | |
1251 | ||
b946845a SF |
1252 | if (!mountdata) |
1253 | goto cifs_parse_mount_err; | |
1254 | ||
1255 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); | |
1256 | if (!mountdata_copy) | |
1257 | goto cifs_parse_mount_err; | |
1da177e4 | 1258 | |
b946845a | 1259 | options = mountdata_copy; |
4906e50b | 1260 | end = options + strlen(options); |
8830d7e0 | 1261 | |
50c2f753 | 1262 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 1263 | if (options[4] != 0) { |
1da177e4 LT |
1264 | separator[0] = options[4]; |
1265 | options += 5; | |
1266 | } else { | |
f96637be | 1267 | cifs_dbg(FYI, "Null separator not allowed\n"); |
1da177e4 LT |
1268 | } |
1269 | } | |
3d3ea8e6 SP |
1270 | vol->backupuid_specified = false; /* no backup intent for a user */ |
1271 | vol->backupgid_specified = false; /* no backup intent for a group */ | |
50c2f753 | 1272 | |
37d4f99b JL |
1273 | switch (cifs_parse_devname(devname, vol)) { |
1274 | case 0: | |
1275 | break; | |
1276 | case -ENOMEM: | |
1277 | cifs_dbg(VFS, "Unable to allocate memory for devname.\n"); | |
1278 | goto cifs_parse_mount_err; | |
1279 | case -EINVAL: | |
1280 | cifs_dbg(VFS, "Malformed UNC in devname.\n"); | |
1281 | goto cifs_parse_mount_err; | |
1282 | default: | |
1283 | cifs_dbg(VFS, "Unknown error parsing devname.\n"); | |
1284 | goto cifs_parse_mount_err; | |
d387a5c5 JL |
1285 | } |
1286 | ||
1da177e4 | 1287 | while ((data = strsep(&options, separator)) != NULL) { |
8830d7e0 SP |
1288 | substring_t args[MAX_OPT_ARGS]; |
1289 | unsigned long option; | |
1290 | int token; | |
1291 | ||
1da177e4 LT |
1292 | if (!*data) |
1293 | continue; | |
1da177e4 | 1294 | |
8830d7e0 SP |
1295 | token = match_token(data, cifs_mount_option_tokens, args); |
1296 | ||
1297 | switch (token) { | |
1298 | ||
1299 | /* Ingnore the following */ | |
1300 | case Opt_ignore: | |
1301 | break; | |
1302 | ||
1303 | /* Boolean values */ | |
1304 | case Opt_user_xattr: | |
1da177e4 | 1305 | vol->no_xattr = 0; |
8830d7e0 SP |
1306 | break; |
1307 | case Opt_nouser_xattr: | |
1da177e4 | 1308 | vol->no_xattr = 1; |
8830d7e0 SP |
1309 | break; |
1310 | case Opt_forceuid: | |
9b9d6b24 | 1311 | override_uid = 1; |
8830d7e0 SP |
1312 | break; |
1313 | case Opt_noforceuid: | |
9b9d6b24 | 1314 | override_uid = 0; |
8830d7e0 | 1315 | break; |
72bd481f JL |
1316 | case Opt_forcegid: |
1317 | override_gid = 1; | |
1318 | break; | |
1319 | case Opt_noforcegid: | |
1320 | override_gid = 0; | |
1321 | break; | |
8830d7e0 | 1322 | case Opt_noblocksend: |
edf1ae40 | 1323 | vol->noblocksnd = 1; |
8830d7e0 SP |
1324 | break; |
1325 | case Opt_noautotune: | |
edf1ae40 | 1326 | vol->noautotune = 1; |
8830d7e0 SP |
1327 | break; |
1328 | case Opt_hard: | |
1da177e4 | 1329 | vol->retry = 1; |
8830d7e0 SP |
1330 | break; |
1331 | case Opt_soft: | |
1da177e4 | 1332 | vol->retry = 0; |
8830d7e0 SP |
1333 | break; |
1334 | case Opt_perm: | |
1da177e4 | 1335 | vol->noperm = 0; |
8830d7e0 SP |
1336 | break; |
1337 | case Opt_noperm: | |
1da177e4 | 1338 | vol->noperm = 1; |
8830d7e0 SP |
1339 | break; |
1340 | case Opt_mapchars: | |
6a0b4824 | 1341 | vol->remap = 1; |
8830d7e0 SP |
1342 | break; |
1343 | case Opt_nomapchars: | |
6a0b4824 | 1344 | vol->remap = 0; |
8830d7e0 SP |
1345 | break; |
1346 | case Opt_sfu: | |
50c2f753 | 1347 | vol->sfu_emul = 1; |
8830d7e0 SP |
1348 | break; |
1349 | case Opt_nosfu: | |
50c2f753 | 1350 | vol->sfu_emul = 0; |
8830d7e0 SP |
1351 | break; |
1352 | case Opt_nodfs: | |
2c1b8615 | 1353 | vol->nodfs = 1; |
8830d7e0 SP |
1354 | break; |
1355 | case Opt_posixpaths: | |
ac67055e | 1356 | vol->posix_paths = 1; |
8830d7e0 SP |
1357 | break; |
1358 | case Opt_noposixpaths: | |
ac67055e | 1359 | vol->posix_paths = 0; |
8830d7e0 SP |
1360 | break; |
1361 | case Opt_nounix: | |
c18c842b | 1362 | vol->no_linux_ext = 1; |
8830d7e0 SP |
1363 | break; |
1364 | case Opt_nocase: | |
50c2f753 | 1365 | vol->nocase = 1; |
8830d7e0 SP |
1366 | break; |
1367 | case Opt_brl: | |
c46fa8ac | 1368 | vol->nobrl = 0; |
8830d7e0 SP |
1369 | break; |
1370 | case Opt_nobrl: | |
c46fa8ac | 1371 | vol->nobrl = 1; |
5cfdddcf PS |
1372 | /* |
1373 | * turn off mandatory locking in mode | |
8830d7e0 | 1374 | * if remote locking is turned off since the |
5cfdddcf PS |
1375 | * local vfs will do advisory |
1376 | */ | |
50c2f753 SF |
1377 | if (vol->file_mode == |
1378 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1379 | vol->file_mode = S_IALLUGO; |
8830d7e0 SP |
1380 | break; |
1381 | case Opt_forcemandatorylock: | |
13a6e42a | 1382 | vol->mand_lock = 1; |
8830d7e0 SP |
1383 | break; |
1384 | case Opt_setuids: | |
1da177e4 | 1385 | vol->setuids = 1; |
8830d7e0 SP |
1386 | break; |
1387 | case Opt_nosetuids: | |
1da177e4 | 1388 | vol->setuids = 0; |
8830d7e0 SP |
1389 | break; |
1390 | case Opt_dynperm: | |
d0a9c078 | 1391 | vol->dynperm = true; |
8830d7e0 SP |
1392 | break; |
1393 | case Opt_nodynperm: | |
d0a9c078 | 1394 | vol->dynperm = false; |
8830d7e0 SP |
1395 | break; |
1396 | case Opt_nohard: | |
1da177e4 | 1397 | vol->retry = 0; |
8830d7e0 SP |
1398 | break; |
1399 | case Opt_nosoft: | |
1da177e4 | 1400 | vol->retry = 1; |
8830d7e0 SP |
1401 | break; |
1402 | case Opt_nointr: | |
1da177e4 | 1403 | vol->intr = 0; |
8830d7e0 SP |
1404 | break; |
1405 | case Opt_intr: | |
1da177e4 | 1406 | vol->intr = 1; |
8830d7e0 SP |
1407 | break; |
1408 | case Opt_nostrictsync: | |
be652445 | 1409 | vol->nostrictsync = 1; |
8830d7e0 SP |
1410 | break; |
1411 | case Opt_strictsync: | |
be652445 | 1412 | vol->nostrictsync = 0; |
8830d7e0 SP |
1413 | break; |
1414 | case Opt_serverino: | |
1da177e4 | 1415 | vol->server_ino = 1; |
8830d7e0 SP |
1416 | break; |
1417 | case Opt_noserverino: | |
1da177e4 | 1418 | vol->server_ino = 0; |
8830d7e0 SP |
1419 | break; |
1420 | case Opt_rwpidforward: | |
d4ffff1f | 1421 | vol->rwpidforward = 1; |
8830d7e0 SP |
1422 | break; |
1423 | case Opt_cifsacl: | |
0a4b92c0 | 1424 | vol->cifs_acl = 1; |
8830d7e0 SP |
1425 | break; |
1426 | case Opt_nocifsacl: | |
0a4b92c0 | 1427 | vol->cifs_acl = 0; |
8830d7e0 SP |
1428 | break; |
1429 | case Opt_acl: | |
1da177e4 | 1430 | vol->no_psx_acl = 0; |
8830d7e0 SP |
1431 | break; |
1432 | case Opt_noacl: | |
1da177e4 | 1433 | vol->no_psx_acl = 1; |
8830d7e0 SP |
1434 | break; |
1435 | case Opt_locallease: | |
84210e91 | 1436 | vol->local_lease = 1; |
8830d7e0 SP |
1437 | break; |
1438 | case Opt_sign: | |
1e3cc57e | 1439 | vol->sign = true; |
8830d7e0 SP |
1440 | break; |
1441 | case Opt_seal: | |
95b1cb90 | 1442 | /* we do not do the following in secFlags because seal |
8830d7e0 SP |
1443 | * is a per tree connection (mount) not a per socket |
1444 | * or per-smb connection option in the protocol | |
1445 | * vol->secFlg |= CIFSSEC_MUST_SEAL; | |
1446 | */ | |
95b1cb90 | 1447 | vol->seal = 1; |
8830d7e0 | 1448 | break; |
8830d7e0 | 1449 | case Opt_noac: |
50c2f753 SF |
1450 | printk(KERN_WARNING "CIFS: Mount option noac not " |
1451 | "supported. Instead set " | |
1452 | "/proc/fs/cifs/LookupCacheEnabled to 0\n"); | |
8830d7e0 SP |
1453 | break; |
1454 | case Opt_fsc: | |
607a569d | 1455 | #ifndef CONFIG_CIFS_FSCACHE |
f96637be | 1456 | cifs_dbg(VFS, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n"); |
b946845a | 1457 | goto cifs_parse_mount_err; |
607a569d | 1458 | #endif |
fa1df75d | 1459 | vol->fsc = true; |
8830d7e0 SP |
1460 | break; |
1461 | case Opt_mfsymlinks: | |
736a3320 | 1462 | vol->mfsymlinks = true; |
8830d7e0 SP |
1463 | break; |
1464 | case Opt_multiuser: | |
0eb8a132 | 1465 | vol->multiuser = true; |
8830d7e0 | 1466 | break; |
d8162558 JL |
1467 | case Opt_sloppy: |
1468 | sloppy = true; | |
1469 | break; | |
a0b3df5c JL |
1470 | case Opt_nosharesock: |
1471 | vol->nosharesock = true; | |
1472 | break; | |
8830d7e0 SP |
1473 | |
1474 | /* Numeric Values */ | |
1475 | case Opt_backupuid: | |
3da46565 | 1476 | if (get_option_uid(args, &vol->backupuid)) { |
f96637be JP |
1477 | cifs_dbg(VFS, "%s: Invalid backupuid value\n", |
1478 | __func__); | |
3d3ea8e6 SP |
1479 | goto cifs_parse_mount_err; |
1480 | } | |
1481 | vol->backupuid_specified = true; | |
8830d7e0 SP |
1482 | break; |
1483 | case Opt_backupgid: | |
3da46565 | 1484 | if (get_option_gid(args, &vol->backupgid)) { |
f96637be JP |
1485 | cifs_dbg(VFS, "%s: Invalid backupgid value\n", |
1486 | __func__); | |
3d3ea8e6 SP |
1487 | goto cifs_parse_mount_err; |
1488 | } | |
1489 | vol->backupgid_specified = true; | |
8830d7e0 SP |
1490 | break; |
1491 | case Opt_uid: | |
3da46565 | 1492 | if (get_option_uid(args, &vol->linux_uid)) { |
f96637be JP |
1493 | cifs_dbg(VFS, "%s: Invalid uid value\n", |
1494 | __func__); | |
8830d7e0 SP |
1495 | goto cifs_parse_mount_err; |
1496 | } | |
8830d7e0 SP |
1497 | uid_specified = true; |
1498 | break; | |
1499 | case Opt_cruid: | |
3da46565 | 1500 | if (get_option_uid(args, &vol->cred_uid)) { |
f96637be JP |
1501 | cifs_dbg(VFS, "%s: Invalid cruid value\n", |
1502 | __func__); | |
8830d7e0 SP |
1503 | goto cifs_parse_mount_err; |
1504 | } | |
8830d7e0 SP |
1505 | break; |
1506 | case Opt_gid: | |
3da46565 | 1507 | if (get_option_gid(args, &vol->linux_gid)) { |
f96637be JP |
1508 | cifs_dbg(VFS, "%s: Invalid gid value\n", |
1509 | __func__); | |
8830d7e0 SP |
1510 | goto cifs_parse_mount_err; |
1511 | } | |
8830d7e0 SP |
1512 | gid_specified = true; |
1513 | break; | |
1514 | case Opt_file_mode: | |
1515 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1516 | cifs_dbg(VFS, "%s: Invalid file_mode value\n", |
1517 | __func__); | |
8830d7e0 SP |
1518 | goto cifs_parse_mount_err; |
1519 | } | |
1520 | vol->file_mode = option; | |
1521 | break; | |
1522 | case Opt_dirmode: | |
1523 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1524 | cifs_dbg(VFS, "%s: Invalid dir_mode value\n", |
1525 | __func__); | |
8830d7e0 SP |
1526 | goto cifs_parse_mount_err; |
1527 | } | |
1528 | vol->dir_mode = option; | |
1529 | break; | |
1530 | case Opt_port: | |
b979aaa1 JL |
1531 | if (get_option_ul(args, &option) || |
1532 | option > USHRT_MAX) { | |
f96637be JP |
1533 | cifs_dbg(VFS, "%s: Invalid port value\n", |
1534 | __func__); | |
8830d7e0 SP |
1535 | goto cifs_parse_mount_err; |
1536 | } | |
b979aaa1 | 1537 | port = (unsigned short)option; |
8830d7e0 SP |
1538 | break; |
1539 | case Opt_rsize: | |
1540 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1541 | cifs_dbg(VFS, "%s: Invalid rsize value\n", |
1542 | __func__); | |
b946845a | 1543 | goto cifs_parse_mount_err; |
8830d7e0 SP |
1544 | } |
1545 | vol->rsize = option; | |
1546 | break; | |
1547 | case Opt_wsize: | |
1548 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1549 | cifs_dbg(VFS, "%s: Invalid wsize value\n", |
1550 | __func__); | |
8830d7e0 SP |
1551 | goto cifs_parse_mount_err; |
1552 | } | |
1553 | vol->wsize = option; | |
1554 | break; | |
1555 | case Opt_actimeo: | |
1556 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1557 | cifs_dbg(VFS, "%s: Invalid actimeo value\n", |
1558 | __func__); | |
8830d7e0 SP |
1559 | goto cifs_parse_mount_err; |
1560 | } | |
1561 | vol->actimeo = HZ * option; | |
1562 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
f96637be | 1563 | cifs_dbg(VFS, "attribute cache timeout too large\n"); |
8830d7e0 SP |
1564 | goto cifs_parse_mount_err; |
1565 | } | |
1566 | break; | |
1567 | ||
1568 | /* String Arguments */ | |
1569 | ||
4fe9e963 SP |
1570 | case Opt_blank_user: |
1571 | /* null user, ie. anonymous authentication */ | |
1572 | vol->nullauth = 1; | |
1573 | vol->username = NULL; | |
1574 | break; | |
8830d7e0 SP |
1575 | case Opt_user: |
1576 | string = match_strdup(args); | |
1577 | if (string == NULL) | |
1578 | goto out_nomem; | |
1579 | ||
8c3a2b4c SL |
1580 | if (strnlen(string, CIFS_MAX_USERNAME_LEN) > |
1581 | CIFS_MAX_USERNAME_LEN) { | |
8830d7e0 SP |
1582 | printk(KERN_WARNING "CIFS: username too long\n"); |
1583 | goto cifs_parse_mount_err; | |
1584 | } | |
1585 | vol->username = kstrdup(string, GFP_KERNEL); | |
f96637be | 1586 | if (!vol->username) |
8830d7e0 | 1587 | goto cifs_parse_mount_err; |
8830d7e0 SP |
1588 | break; |
1589 | case Opt_blank_pass: | |
8830d7e0 SP |
1590 | /* passwords have to be handled differently |
1591 | * to allow the character used for deliminator | |
1592 | * to be passed within them | |
1593 | */ | |
1594 | ||
c369c9a4 SP |
1595 | /* |
1596 | * Check if this is a case where the password | |
1597 | * starts with a delimiter | |
1598 | */ | |
1599 | tmp_end = strchr(data, '='); | |
1600 | tmp_end++; | |
1601 | if (!(tmp_end < end && tmp_end[1] == delim)) { | |
1602 | /* No it is not. Set the password to NULL */ | |
1603 | vol->password = NULL; | |
1604 | break; | |
1605 | } | |
1606 | /* Yes it is. Drop down to Opt_pass below.*/ | |
1607 | case Opt_pass: | |
8830d7e0 SP |
1608 | /* Obtain the value string */ |
1609 | value = strchr(data, '='); | |
10238074 | 1610 | value++; |
8830d7e0 SP |
1611 | |
1612 | /* Set tmp_end to end of the string */ | |
1613 | tmp_end = (char *) value + strlen(value); | |
1614 | ||
1615 | /* Check if following character is the deliminator | |
1616 | * If yes, we have encountered a double deliminator | |
1617 | * reset the NULL character to the deliminator | |
1618 | */ | |
e73f843a | 1619 | if (tmp_end < end && tmp_end[1] == delim) { |
8830d7e0 SP |
1620 | tmp_end[0] = delim; |
1621 | ||
e73f843a SJ |
1622 | /* Keep iterating until we get to a single |
1623 | * deliminator OR the end | |
1624 | */ | |
1625 | while ((tmp_end = strchr(tmp_end, delim)) | |
1626 | != NULL && (tmp_end[1] == delim)) { | |
1627 | tmp_end = (char *) &tmp_end[2]; | |
1628 | } | |
1629 | ||
1630 | /* Reset var options to point to next element */ | |
1631 | if (tmp_end) { | |
1632 | tmp_end[0] = '\0'; | |
1633 | options = (char *) &tmp_end[1]; | |
1634 | } else | |
1635 | /* Reached the end of the mount option | |
1636 | * string */ | |
1637 | options = end; | |
8830d7e0 SP |
1638 | } |
1639 | ||
8830d7e0 SP |
1640 | /* Now build new password string */ |
1641 | temp_len = strlen(value); | |
1642 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); | |
1643 | if (vol->password == NULL) { | |
1644 | printk(KERN_WARNING "CIFS: no memory " | |
1645 | "for password\n"); | |
1646 | goto cifs_parse_mount_err; | |
1647 | } | |
1648 | ||
1649 | for (i = 0, j = 0; i < temp_len; i++, j++) { | |
1650 | vol->password[j] = value[i]; | |
1651 | if ((value[i] == delim) && | |
1652 | value[i+1] == delim) | |
1653 | /* skip the second deliminator */ | |
1654 | i++; | |
1655 | } | |
1656 | vol->password[j] = '\0'; | |
1657 | break; | |
4fe9e963 | 1658 | case Opt_blank_ip: |
b979aaa1 JL |
1659 | /* FIXME: should this be an error instead? */ |
1660 | got_ip = false; | |
4fe9e963 | 1661 | break; |
8830d7e0 SP |
1662 | case Opt_ip: |
1663 | string = match_strdup(args); | |
1664 | if (string == NULL) | |
1665 | goto out_nomem; | |
1666 | ||
b979aaa1 JL |
1667 | if (!cifs_convert_address(dstaddr, string, |
1668 | strlen(string))) { | |
1669 | printk(KERN_ERR "CIFS: bad ip= option (%s).\n", | |
1670 | string); | |
8830d7e0 SP |
1671 | goto cifs_parse_mount_err; |
1672 | } | |
b979aaa1 | 1673 | got_ip = true; |
8830d7e0 | 1674 | break; |
8830d7e0 SP |
1675 | case Opt_domain: |
1676 | string = match_strdup(args); | |
1677 | if (string == NULL) | |
1678 | goto out_nomem; | |
1679 | ||
057d6332 CG |
1680 | if (strnlen(string, CIFS_MAX_DOMAINNAME_LEN) |
1681 | == CIFS_MAX_DOMAINNAME_LEN) { | |
8830d7e0 SP |
1682 | printk(KERN_WARNING "CIFS: domain name too" |
1683 | " long\n"); | |
1684 | goto cifs_parse_mount_err; | |
1685 | } | |
1686 | ||
1687 | vol->domainname = kstrdup(string, GFP_KERNEL); | |
1688 | if (!vol->domainname) { | |
1689 | printk(KERN_WARNING "CIFS: no memory " | |
1690 | "for domainname\n"); | |
1691 | goto cifs_parse_mount_err; | |
1692 | } | |
f96637be | 1693 | cifs_dbg(FYI, "Domain name set\n"); |
8830d7e0 SP |
1694 | break; |
1695 | case Opt_srcaddr: | |
1696 | string = match_strdup(args); | |
1697 | if (string == NULL) | |
1698 | goto out_nomem; | |
1699 | ||
4fe9e963 | 1700 | if (!cifs_convert_address( |
8830d7e0 SP |
1701 | (struct sockaddr *)&vol->srcaddr, |
1702 | string, strlen(string))) { | |
1703 | printk(KERN_WARNING "CIFS: Could not parse" | |
1704 | " srcaddr: %s\n", string); | |
1705 | goto cifs_parse_mount_err; | |
1706 | } | |
1707 | break; | |
8830d7e0 SP |
1708 | case Opt_iocharset: |
1709 | string = match_strdup(args); | |
1710 | if (string == NULL) | |
1711 | goto out_nomem; | |
1712 | ||
4fe9e963 | 1713 | if (strnlen(string, 1024) >= 65) { |
8830d7e0 SP |
1714 | printk(KERN_WARNING "CIFS: iocharset name " |
1715 | "too long.\n"); | |
1716 | goto cifs_parse_mount_err; | |
1717 | } | |
1718 | ||
1719 | if (strnicmp(string, "default", 7) != 0) { | |
1720 | vol->iocharset = kstrdup(string, | |
1721 | GFP_KERNEL); | |
1722 | if (!vol->iocharset) { | |
1723 | printk(KERN_WARNING "CIFS: no memory" | |
1724 | "for charset\n"); | |
1725 | goto cifs_parse_mount_err; | |
1726 | } | |
1727 | } | |
1728 | /* if iocharset not set then load_nls_default | |
1729 | * is used by caller | |
1730 | */ | |
f96637be | 1731 | cifs_dbg(FYI, "iocharset set to %s\n", string); |
8830d7e0 | 1732 | break; |
8830d7e0 SP |
1733 | case Opt_netbiosname: |
1734 | string = match_strdup(args); | |
1735 | if (string == NULL) | |
1736 | goto out_nomem; | |
1737 | ||
8830d7e0 SP |
1738 | memset(vol->source_rfc1001_name, 0x20, |
1739 | RFC1001_NAME_LEN); | |
1740 | /* | |
1741 | * FIXME: are there cases in which a comma can | |
1742 | * be valid in workstation netbios name (and | |
1743 | * need special handling)? | |
1744 | */ | |
1745 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
1746 | /* don't ucase netbiosname for user */ | |
1747 | if (string[i] == 0) | |
1748 | break; | |
1749 | vol->source_rfc1001_name[i] = string[i]; | |
1750 | } | |
1751 | /* The string has 16th byte zero still from | |
1752 | * set at top of the function | |
1753 | */ | |
1754 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
1755 | printk(KERN_WARNING "CIFS: netbiosname" | |
1756 | " longer than 15 truncated.\n"); | |
1757 | ||
1758 | break; | |
1759 | case Opt_servern: | |
1760 | /* servernetbiosname specified override *SMBSERVER */ | |
1761 | string = match_strdup(args); | |
1762 | if (string == NULL) | |
1763 | goto out_nomem; | |
1764 | ||
8830d7e0 SP |
1765 | /* last byte, type, is 0x20 for servr type */ |
1766 | memset(vol->target_rfc1001_name, 0x20, | |
1767 | RFC1001_NAME_LEN_WITH_NULL); | |
1768 | ||
1769 | /* BB are there cases in which a comma can be | |
1770 | valid in this workstation netbios name | |
1771 | (and need special handling)? */ | |
1772 | ||
1773 | /* user or mount helper must uppercase the | |
1774 | netbios name */ | |
1775 | for (i = 0; i < 15; i++) { | |
1776 | if (string[i] == 0) | |
1777 | break; | |
1778 | vol->target_rfc1001_name[i] = string[i]; | |
1779 | } | |
1780 | /* The string has 16th byte zero still from | |
1781 | set at top of the function */ | |
1782 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
1783 | printk(KERN_WARNING "CIFS: server net" | |
1784 | "biosname longer than 15 truncated.\n"); | |
1785 | break; | |
1786 | case Opt_ver: | |
1787 | string = match_strdup(args); | |
1788 | if (string == NULL) | |
1789 | goto out_nomem; | |
1790 | ||
5249af32 | 1791 | if (strnicmp(string, "1", 1) == 0) { |
8830d7e0 SP |
1792 | /* This is the default */ |
1793 | break; | |
1794 | } | |
1795 | /* For all other value, error */ | |
1796 | printk(KERN_WARNING "CIFS: Invalid version" | |
1797 | " specified\n"); | |
b946845a | 1798 | goto cifs_parse_mount_err; |
23db65f5 JL |
1799 | case Opt_vers: |
1800 | string = match_strdup(args); | |
1801 | if (string == NULL) | |
1802 | goto out_nomem; | |
1803 | ||
1804 | if (cifs_parse_smb_version(string, vol) != 0) | |
1805 | goto cifs_parse_mount_err; | |
1806 | break; | |
8830d7e0 SP |
1807 | case Opt_sec: |
1808 | string = match_strdup(args); | |
1809 | if (string == NULL) | |
1810 | goto out_nomem; | |
1811 | ||
8830d7e0 SP |
1812 | if (cifs_parse_security_flavors(string, vol) != 0) |
1813 | goto cifs_parse_mount_err; | |
1814 | break; | |
15b6a473 JL |
1815 | case Opt_cache: |
1816 | string = match_strdup(args); | |
1817 | if (string == NULL) | |
1818 | goto out_nomem; | |
1819 | ||
1820 | if (cifs_parse_cache_flavor(string, vol) != 0) | |
1821 | goto cifs_parse_mount_err; | |
1822 | break; | |
8830d7e0 | 1823 | default: |
d8162558 JL |
1824 | /* |
1825 | * An option we don't recognize. Save it off for later | |
1826 | * if we haven't already found one | |
1827 | */ | |
1828 | if (!invalid) | |
1829 | invalid = data; | |
8830d7e0 | 1830 | break; |
1da177e4 | 1831 | } |
8830d7e0 SP |
1832 | /* Free up any allocated string */ |
1833 | kfree(string); | |
1834 | string = NULL; | |
1da177e4 | 1835 | } |
0eb8a132 | 1836 | |
d8162558 JL |
1837 | if (!sloppy && invalid) { |
1838 | printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid); | |
1839 | goto cifs_parse_mount_err; | |
1840 | } | |
1841 | ||
8a8798a5 JL |
1842 | #ifndef CONFIG_KEYS |
1843 | /* Muliuser mounts require CONFIG_KEYS support */ | |
1844 | if (vol->multiuser) { | |
f96637be | 1845 | cifs_dbg(VFS, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n"); |
b946845a | 1846 | goto cifs_parse_mount_err; |
0eb8a132 | 1847 | } |
8a8798a5 | 1848 | #endif |
e5e69abd | 1849 | if (!vol->UNC) { |
37d4f99b | 1850 | cifs_dbg(VFS, "CIFS mount error: No usable UNC path provided in device string!\n"); |
e5e69abd JL |
1851 | goto cifs_parse_mount_err; |
1852 | } | |
0eb8a132 | 1853 | |
62a1a439 JL |
1854 | /* make sure UNC has a share name */ |
1855 | if (!strchr(vol->UNC + 3, '\\')) { | |
f96637be | 1856 | cifs_dbg(VFS, "Malformed UNC. Unable to find share name.\n"); |
62a1a439 JL |
1857 | goto cifs_parse_mount_err; |
1858 | } | |
1859 | ||
b979aaa1 JL |
1860 | if (!got_ip) { |
1861 | /* No ip= option specified? Try to get it from UNC */ | |
1862 | if (!cifs_convert_address(dstaddr, &vol->UNC[2], | |
1863 | strlen(&vol->UNC[2]))) { | |
1864 | printk(KERN_ERR "Unable to determine destination " | |
1865 | "address.\n"); | |
1866 | goto cifs_parse_mount_err; | |
1867 | } | |
1868 | } | |
1869 | ||
1870 | /* set the port that we got earlier */ | |
1871 | cifs_set_port(dstaddr, port); | |
1da177e4 | 1872 | |
9b9d6b24 JL |
1873 | if (uid_specified) |
1874 | vol->override_uid = override_uid; | |
1875 | else if (override_uid == 1) | |
1876 | printk(KERN_NOTICE "CIFS: ignoring forceuid mount option " | |
1877 | "specified with no uid= option.\n"); | |
1878 | ||
1879 | if (gid_specified) | |
1880 | vol->override_gid = override_gid; | |
1881 | else if (override_gid == 1) | |
1882 | printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " | |
1883 | "specified with no gid= option.\n"); | |
1884 | ||
b946845a | 1885 | kfree(mountdata_copy); |
1da177e4 | 1886 | return 0; |
b946845a | 1887 | |
8830d7e0 SP |
1888 | out_nomem: |
1889 | printk(KERN_WARNING "Could not allocate temporary buffer\n"); | |
b946845a | 1890 | cifs_parse_mount_err: |
8830d7e0 | 1891 | kfree(string); |
b946845a SF |
1892 | kfree(mountdata_copy); |
1893 | return 1; | |
1da177e4 LT |
1894 | } |
1895 | ||
3eb9a889 BG |
1896 | /** Returns true if srcaddr isn't specified and rhs isn't |
1897 | * specified, or if srcaddr is specified and | |
1898 | * matches the IP address of the rhs argument. | |
1899 | */ | |
1900 | static bool | |
1901 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
1902 | { | |
1903 | switch (srcaddr->sa_family) { | |
1904 | case AF_UNSPEC: | |
1905 | return (rhs->sa_family == AF_UNSPEC); | |
1906 | case AF_INET: { | |
1907 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
1908 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
1909 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
1910 | } | |
1911 | case AF_INET6: { | |
1912 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
e3e2775c | 1913 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs; |
3eb9a889 BG |
1914 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); |
1915 | } | |
1916 | default: | |
1917 | WARN_ON(1); | |
1918 | return false; /* don't expect to be here */ | |
1919 | } | |
1920 | } | |
1921 | ||
4b886136 PS |
1922 | /* |
1923 | * If no port is specified in addr structure, we try to match with 445 port | |
1924 | * and if it fails - with 139 ports. It should be called only if address | |
1925 | * families of server and addr are equal. | |
1926 | */ | |
1927 | static bool | |
1928 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
1929 | { | |
6da97910 | 1930 | __be16 port, *sport; |
4b886136 PS |
1931 | |
1932 | switch (addr->sa_family) { | |
1933 | case AF_INET: | |
1934 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
1935 | port = ((struct sockaddr_in *) addr)->sin_port; | |
1936 | break; | |
1937 | case AF_INET6: | |
1938 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
1939 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
1940 | break; | |
1941 | default: | |
1942 | WARN_ON(1); | |
1943 | return false; | |
1944 | } | |
1945 | ||
1946 | if (!port) { | |
1947 | port = htons(CIFS_PORT); | |
1948 | if (port == *sport) | |
1949 | return true; | |
1950 | ||
1951 | port = htons(RFC1001_PORT); | |
1952 | } | |
1953 | ||
1954 | return port == *sport; | |
1955 | } | |
3eb9a889 | 1956 | |
4515148e | 1957 | static bool |
3eb9a889 BG |
1958 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
1959 | struct sockaddr *srcaddr) | |
4515148e | 1960 | { |
4515148e | 1961 | switch (addr->sa_family) { |
a9f1b85e PS |
1962 | case AF_INET: { |
1963 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
1964 | struct sockaddr_in *srv_addr4 = | |
1965 | (struct sockaddr_in *)&server->dstaddr; | |
1966 | ||
1967 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 1968 | return false; |
4515148e | 1969 | break; |
a9f1b85e PS |
1970 | } |
1971 | case AF_INET6: { | |
1972 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
1973 | struct sockaddr_in6 *srv_addr6 = | |
1974 | (struct sockaddr_in6 *)&server->dstaddr; | |
1975 | ||
4515148e | 1976 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 1977 | &srv_addr6->sin6_addr)) |
4515148e | 1978 | return false; |
a9f1b85e | 1979 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 1980 | return false; |
4515148e JL |
1981 | break; |
1982 | } | |
a9f1b85e PS |
1983 | default: |
1984 | WARN_ON(1); | |
1985 | return false; /* don't expect to be here */ | |
1986 | } | |
4515148e | 1987 | |
3eb9a889 BG |
1988 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
1989 | return false; | |
1990 | ||
4515148e JL |
1991 | return true; |
1992 | } | |
1993 | ||
daf5b0b6 JL |
1994 | static bool |
1995 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
1996 | { | |
3f618223 JL |
1997 | /* |
1998 | * The select_sectype function should either return the vol->sectype | |
1999 | * that was specified, or "Unspecified" if that sectype was not | |
2000 | * compatible with the given NEGOTIATE request. | |
2001 | */ | |
2002 | if (select_sectype(server, vol->sectype) == Unspecified) | |
daf5b0b6 | 2003 | return false; |
daf5b0b6 | 2004 | |
3f618223 JL |
2005 | /* |
2006 | * Now check if signing mode is acceptable. No need to check | |
2007 | * global_secflags at this point since if MUST_SIGN is set then | |
2008 | * the server->sign had better be too. | |
2009 | */ | |
38d77c50 JL |
2010 | if (vol->sign && !server->sign) |
2011 | return false; | |
daf5b0b6 JL |
2012 | |
2013 | return true; | |
2014 | } | |
2015 | ||
9fa114f7 | 2016 | static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol) |
37bb04e5 | 2017 | { |
9fa114f7 JL |
2018 | struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr; |
2019 | ||
a0b3df5c JL |
2020 | if (vol->nosharesock) |
2021 | return 0; | |
2022 | ||
23db65f5 JL |
2023 | if ((server->vals != vol->vals) || (server->ops != vol->ops)) |
2024 | return 0; | |
2025 | ||
37bb04e5 PS |
2026 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) |
2027 | return 0; | |
2028 | ||
2029 | if (!match_address(server, addr, | |
2030 | (struct sockaddr *)&vol->srcaddr)) | |
2031 | return 0; | |
2032 | ||
2033 | if (!match_port(server, addr)) | |
2034 | return 0; | |
2035 | ||
2036 | if (!match_security(server, vol)) | |
2037 | return 0; | |
2038 | ||
2039 | return 1; | |
2040 | } | |
2041 | ||
e7ddee90 | 2042 | static struct TCP_Server_Info * |
9fa114f7 | 2043 | cifs_find_tcp_session(struct smb_vol *vol) |
1da177e4 | 2044 | { |
e7ddee90 | 2045 | struct TCP_Server_Info *server; |
e7ddee90 | 2046 | |
3f9bcca7 | 2047 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 2048 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
9fa114f7 | 2049 | if (!match_server(server, vol)) |
daf5b0b6 JL |
2050 | continue; |
2051 | ||
e7ddee90 | 2052 | ++server->srv_count; |
3f9bcca7 | 2053 | spin_unlock(&cifs_tcp_ses_lock); |
f96637be | 2054 | cifs_dbg(FYI, "Existing tcp session with server found\n"); |
e7ddee90 | 2055 | return server; |
1da177e4 | 2056 | } |
3f9bcca7 | 2057 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2058 | return NULL; |
2059 | } | |
1b20d672 | 2060 | |
14fbf50d | 2061 | static void |
e7ddee90 | 2062 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
1da177e4 | 2063 | { |
e7ddee90 | 2064 | struct task_struct *task; |
1b20d672 | 2065 | |
3f9bcca7 | 2066 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 2067 | if (--server->srv_count > 0) { |
3f9bcca7 | 2068 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 2069 | return; |
1da177e4 | 2070 | } |
1b20d672 | 2071 | |
f1d0c998 RL |
2072 | put_net(cifs_net_ns(server)); |
2073 | ||
e7ddee90 | 2074 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 2075 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2076 | |
c74093b6 JL |
2077 | cancel_delayed_work_sync(&server->echo); |
2078 | ||
e7ddee90 JL |
2079 | spin_lock(&GlobalMid_Lock); |
2080 | server->tcpStatus = CifsExiting; | |
2081 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 2082 | |
d2b91521 | 2083 | cifs_crypto_shash_release(server); |
488f1d2d SJ |
2084 | cifs_fscache_release_client_cookie(server); |
2085 | ||
21e73393 SP |
2086 | kfree(server->session_key.response); |
2087 | server->session_key.response = NULL; | |
2088 | server->session_key.len = 0; | |
2089 | ||
e7ddee90 JL |
2090 | task = xchg(&server->tsk, NULL); |
2091 | if (task) | |
2092 | force_sig(SIGKILL, task); | |
1da177e4 LT |
2093 | } |
2094 | ||
63c038c2 JL |
2095 | static struct TCP_Server_Info * |
2096 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
2097 | { | |
2098 | struct TCP_Server_Info *tcp_ses = NULL; | |
63c038c2 JL |
2099 | int rc; |
2100 | ||
f96637be | 2101 | cifs_dbg(FYI, "UNC: %s\n", volume_info->UNC); |
63c038c2 JL |
2102 | |
2103 | /* see if we already have a matching tcp_ses */ | |
9fa114f7 | 2104 | tcp_ses = cifs_find_tcp_session(volume_info); |
63c038c2 JL |
2105 | if (tcp_ses) |
2106 | return tcp_ses; | |
2107 | ||
2108 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
2109 | if (!tcp_ses) { | |
2110 | rc = -ENOMEM; | |
2111 | goto out_err; | |
2112 | } | |
2113 | ||
23db65f5 JL |
2114 | tcp_ses->ops = volume_info->ops; |
2115 | tcp_ses->vals = volume_info->vals; | |
f1d0c998 | 2116 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
2117 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
2118 | if (IS_ERR(tcp_ses->hostname)) { | |
2119 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 2120 | goto out_err_crypto_release; |
63c038c2 JL |
2121 | } |
2122 | ||
2123 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
2124 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 2125 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
fc40f9cf | 2126 | tcp_ses->in_flight = 0; |
2d86dbc9 | 2127 | tcp_ses->credits = 1; |
63c038c2 JL |
2128 | init_waitqueue_head(&tcp_ses->response_q); |
2129 | init_waitqueue_head(&tcp_ses->request_q); | |
2130 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
2131 | mutex_init(&tcp_ses->srv_mutex); | |
2132 | memcpy(tcp_ses->workstation_RFC1001_name, | |
2133 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
2134 | memcpy(tcp_ses->server_RFC1001_name, | |
2135 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 2136 | tcp_ses->session_estab = false; |
63c038c2 | 2137 | tcp_ses->sequence_number = 0; |
fda35943 | 2138 | tcp_ses->lstrp = jiffies; |
58fa015f | 2139 | spin_lock_init(&tcp_ses->req_lock); |
63c038c2 JL |
2140 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
2141 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 2142 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
9fa114f7 JL |
2143 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
2144 | sizeof(tcp_ses->srcaddr)); | |
2145 | memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr, | |
2146 | sizeof(tcp_ses->dstaddr)); | |
39552ea8 SP |
2147 | #ifdef CONFIG_CIFS_SMB2 |
2148 | get_random_bytes(tcp_ses->client_guid, SMB2_CLIENT_GUID_SIZE); | |
2149 | #endif | |
63c038c2 JL |
2150 | /* |
2151 | * at this point we are the only ones with the pointer | |
2152 | * to the struct since the kernel thread not created yet | |
2153 | * no need to spinlock this init of tcpStatus or srv_count | |
2154 | */ | |
2155 | tcp_ses->tcpStatus = CifsNew; | |
2156 | ++tcp_ses->srv_count; | |
2157 | ||
a9f1b85e | 2158 | rc = ip_connect(tcp_ses); |
63c038c2 | 2159 | if (rc < 0) { |
f96637be | 2160 | cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n"); |
f7c5445a | 2161 | goto out_err_crypto_release; |
63c038c2 JL |
2162 | } |
2163 | ||
2164 | /* | |
2165 | * since we're in a cifs function already, we know that | |
2166 | * this will succeed. No need for try_module_get(). | |
2167 | */ | |
2168 | __module_get(THIS_MODULE); | |
7c97c200 | 2169 | tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, |
63c038c2 JL |
2170 | tcp_ses, "cifsd"); |
2171 | if (IS_ERR(tcp_ses->tsk)) { | |
2172 | rc = PTR_ERR(tcp_ses->tsk); | |
f96637be | 2173 | cifs_dbg(VFS, "error %d create cifsd thread\n", rc); |
63c038c2 | 2174 | module_put(THIS_MODULE); |
f7c5445a | 2175 | goto out_err_crypto_release; |
63c038c2 | 2176 | } |
fd88ce93 | 2177 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
63c038c2 JL |
2178 | |
2179 | /* thread spawned, put it on the list */ | |
3f9bcca7 | 2180 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 2181 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 2182 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 2183 | |
488f1d2d SJ |
2184 | cifs_fscache_get_client_cookie(tcp_ses); |
2185 | ||
c74093b6 | 2186 | /* queue echo request delayed work */ |
da472fc8 | 2187 | queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL); |
c74093b6 | 2188 | |
63c038c2 JL |
2189 | return tcp_ses; |
2190 | ||
f7c5445a | 2191 | out_err_crypto_release: |
d2b91521 SP |
2192 | cifs_crypto_shash_release(tcp_ses); |
2193 | ||
f1d0c998 RL |
2194 | put_net(cifs_net_ns(tcp_ses)); |
2195 | ||
63c038c2 JL |
2196 | out_err: |
2197 | if (tcp_ses) { | |
8347a5cd SF |
2198 | if (!IS_ERR(tcp_ses->hostname)) |
2199 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
2200 | if (tcp_ses->ssocket) |
2201 | sock_release(tcp_ses->ssocket); | |
2202 | kfree(tcp_ses); | |
2203 | } | |
2204 | return ERR_PTR(rc); | |
2205 | } | |
2206 | ||
96daf2b0 | 2207 | static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
37bb04e5 | 2208 | { |
3f618223 JL |
2209 | if (vol->sectype != Unspecified && |
2210 | vol->sectype != ses->sectype) | |
2211 | return 0; | |
2212 | ||
2213 | switch (ses->sectype) { | |
37bb04e5 | 2214 | case Kerberos: |
64ed39dd | 2215 | if (!uid_eq(vol->cred_uid, ses->cred_uid)) |
37bb04e5 PS |
2216 | return 0; |
2217 | break; | |
2218 | default: | |
04febabc JL |
2219 | /* NULL username means anonymous session */ |
2220 | if (ses->user_name == NULL) { | |
2221 | if (!vol->nullauth) | |
2222 | return 0; | |
2223 | break; | |
2224 | } | |
2225 | ||
37bb04e5 | 2226 | /* anything else takes username/password */ |
04febabc JL |
2227 | if (strncmp(ses->user_name, |
2228 | vol->username ? vol->username : "", | |
8c3a2b4c | 2229 | CIFS_MAX_USERNAME_LEN)) |
37bb04e5 | 2230 | return 0; |
08b37d51 | 2231 | if ((vol->username && strlen(vol->username) != 0) && |
37bb04e5 PS |
2232 | ses->password != NULL && |
2233 | strncmp(ses->password, | |
2234 | vol->password ? vol->password : "", | |
8c3a2b4c | 2235 | CIFS_MAX_PASSWORD_LEN)) |
37bb04e5 PS |
2236 | return 0; |
2237 | } | |
2238 | return 1; | |
2239 | } | |
2240 | ||
96daf2b0 | 2241 | static struct cifs_ses * |
4ff67b72 | 2242 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 2243 | { |
96daf2b0 | 2244 | struct cifs_ses *ses; |
dea570e0 | 2245 | |
3f9bcca7 | 2246 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 | 2247 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
7f48558e SP |
2248 | if (ses->status == CifsExiting) |
2249 | continue; | |
37bb04e5 PS |
2250 | if (!match_session(ses, vol)) |
2251 | continue; | |
14fbf50d | 2252 | ++ses->ses_count; |
3f9bcca7 | 2253 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2254 | return ses; |
2255 | } | |
3f9bcca7 | 2256 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2257 | return NULL; |
2258 | } | |
dea570e0 | 2259 | |
14fbf50d | 2260 | static void |
96daf2b0 | 2261 | cifs_put_smb_ses(struct cifs_ses *ses) |
14fbf50d | 2262 | { |
7f48558e | 2263 | unsigned int rc, xid; |
14fbf50d | 2264 | struct TCP_Server_Info *server = ses->server; |
dea570e0 | 2265 | |
f96637be | 2266 | cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count); |
7f48558e | 2267 | |
3f9bcca7 | 2268 | spin_lock(&cifs_tcp_ses_lock); |
7f48558e SP |
2269 | if (ses->status == CifsExiting) { |
2270 | spin_unlock(&cifs_tcp_ses_lock); | |
2271 | return; | |
2272 | } | |
14fbf50d | 2273 | if (--ses->ses_count > 0) { |
3f9bcca7 | 2274 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2275 | return; |
2276 | } | |
7f48558e SP |
2277 | if (ses->status == CifsGood) |
2278 | ses->status = CifsExiting; | |
3f9bcca7 | 2279 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2280 | |
7f48558e | 2281 | if (ses->status == CifsExiting && server->ops->logoff) { |
6d5786a3 | 2282 | xid = get_xid(); |
7f48558e SP |
2283 | rc = server->ops->logoff(xid, ses); |
2284 | if (rc) | |
2285 | cifs_dbg(VFS, "%s: Session Logoff failure rc=%d\n", | |
2286 | __func__, rc); | |
6d5786a3 | 2287 | _free_xid(xid); |
14fbf50d | 2288 | } |
7f48558e SP |
2289 | |
2290 | spin_lock(&cifs_tcp_ses_lock); | |
2291 | list_del_init(&ses->smb_ses_list); | |
2292 | spin_unlock(&cifs_tcp_ses_lock); | |
2293 | ||
14fbf50d JL |
2294 | sesInfoFree(ses); |
2295 | cifs_put_tcp_session(server); | |
2296 | } | |
dea570e0 | 2297 | |
8a8798a5 JL |
2298 | #ifdef CONFIG_KEYS |
2299 | ||
057d6332 CG |
2300 | /* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */ |
2301 | #define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1) | |
8a8798a5 JL |
2302 | |
2303 | /* Populate username and pw fields from keyring if possible */ | |
2304 | static int | |
2305 | cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) | |
2306 | { | |
2307 | int rc = 0; | |
2308 | char *desc, *delim, *payload; | |
2309 | ssize_t len; | |
2310 | struct key *key; | |
2311 | struct TCP_Server_Info *server = ses->server; | |
2312 | struct sockaddr_in *sa; | |
2313 | struct sockaddr_in6 *sa6; | |
2314 | struct user_key_payload *upayload; | |
2315 | ||
2316 | desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL); | |
2317 | if (!desc) | |
2318 | return -ENOMEM; | |
2319 | ||
2320 | /* try to find an address key first */ | |
2321 | switch (server->dstaddr.ss_family) { | |
2322 | case AF_INET: | |
2323 | sa = (struct sockaddr_in *)&server->dstaddr; | |
2324 | sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr); | |
2325 | break; | |
2326 | case AF_INET6: | |
2327 | sa6 = (struct sockaddr_in6 *)&server->dstaddr; | |
2328 | sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr); | |
2329 | break; | |
2330 | default: | |
f96637be JP |
2331 | cifs_dbg(FYI, "Bad ss_family (%hu)\n", |
2332 | server->dstaddr.ss_family); | |
8a8798a5 JL |
2333 | rc = -EINVAL; |
2334 | goto out_err; | |
2335 | } | |
2336 | ||
f96637be | 2337 | cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
8a8798a5 JL |
2338 | key = request_key(&key_type_logon, desc, ""); |
2339 | if (IS_ERR(key)) { | |
2340 | if (!ses->domainName) { | |
f96637be | 2341 | cifs_dbg(FYI, "domainName is NULL\n"); |
8a8798a5 JL |
2342 | rc = PTR_ERR(key); |
2343 | goto out_err; | |
2344 | } | |
2345 | ||
2346 | /* didn't work, try to find a domain key */ | |
2347 | sprintf(desc, "cifs:d:%s", ses->domainName); | |
f96637be | 2348 | cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
8a8798a5 JL |
2349 | key = request_key(&key_type_logon, desc, ""); |
2350 | if (IS_ERR(key)) { | |
2351 | rc = PTR_ERR(key); | |
2352 | goto out_err; | |
2353 | } | |
2354 | } | |
2355 | ||
2356 | down_read(&key->sem); | |
2357 | upayload = key->payload.data; | |
2358 | if (IS_ERR_OR_NULL(upayload)) { | |
4edc53c1 | 2359 | rc = upayload ? PTR_ERR(upayload) : -EINVAL; |
8a8798a5 JL |
2360 | goto out_key_put; |
2361 | } | |
2362 | ||
2363 | /* find first : in payload */ | |
2364 | payload = (char *)upayload->data; | |
2365 | delim = strnchr(payload, upayload->datalen, ':'); | |
f96637be | 2366 | cifs_dbg(FYI, "payload=%s\n", payload); |
8a8798a5 | 2367 | if (!delim) { |
f96637be JP |
2368 | cifs_dbg(FYI, "Unable to find ':' in payload (datalen=%d)\n", |
2369 | upayload->datalen); | |
8a8798a5 JL |
2370 | rc = -EINVAL; |
2371 | goto out_key_put; | |
2372 | } | |
2373 | ||
2374 | len = delim - payload; | |
8c3a2b4c | 2375 | if (len > CIFS_MAX_USERNAME_LEN || len <= 0) { |
f96637be JP |
2376 | cifs_dbg(FYI, "Bad value from username search (len=%zd)\n", |
2377 | len); | |
8a8798a5 JL |
2378 | rc = -EINVAL; |
2379 | goto out_key_put; | |
2380 | } | |
2381 | ||
2382 | vol->username = kstrndup(payload, len, GFP_KERNEL); | |
2383 | if (!vol->username) { | |
f96637be JP |
2384 | cifs_dbg(FYI, "Unable to allocate %zd bytes for username\n", |
2385 | len); | |
8a8798a5 JL |
2386 | rc = -ENOMEM; |
2387 | goto out_key_put; | |
2388 | } | |
f96637be | 2389 | cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username); |
8a8798a5 JL |
2390 | |
2391 | len = key->datalen - (len + 1); | |
8c3a2b4c | 2392 | if (len > CIFS_MAX_PASSWORD_LEN || len <= 0) { |
f96637be | 2393 | cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len); |
8a8798a5 JL |
2394 | rc = -EINVAL; |
2395 | kfree(vol->username); | |
2396 | vol->username = NULL; | |
2397 | goto out_key_put; | |
2398 | } | |
2399 | ||
2400 | ++delim; | |
2401 | vol->password = kstrndup(delim, len, GFP_KERNEL); | |
2402 | if (!vol->password) { | |
f96637be JP |
2403 | cifs_dbg(FYI, "Unable to allocate %zd bytes for password\n", |
2404 | len); | |
8a8798a5 JL |
2405 | rc = -ENOMEM; |
2406 | kfree(vol->username); | |
2407 | vol->username = NULL; | |
2408 | goto out_key_put; | |
2409 | } | |
2410 | ||
2411 | out_key_put: | |
2412 | up_read(&key->sem); | |
2413 | key_put(key); | |
2414 | out_err: | |
2415 | kfree(desc); | |
f96637be | 2416 | cifs_dbg(FYI, "%s: returning %d\n", __func__, rc); |
8a8798a5 JL |
2417 | return rc; |
2418 | } | |
2419 | #else /* ! CONFIG_KEYS */ | |
2420 | static inline int | |
2421 | cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), | |
2422 | struct cifs_ses *ses __attribute__((unused))) | |
2423 | { | |
2424 | return -ENOSYS; | |
2425 | } | |
2426 | #endif /* CONFIG_KEYS */ | |
2427 | ||
96daf2b0 | 2428 | static struct cifs_ses * |
36988c76 JL |
2429 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
2430 | { | |
286170aa PS |
2431 | int rc = -ENOMEM; |
2432 | unsigned int xid; | |
96daf2b0 | 2433 | struct cifs_ses *ses; |
a9f1b85e PS |
2434 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
2435 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 | 2436 | |
6d5786a3 | 2437 | xid = get_xid(); |
36988c76 | 2438 | |
4ff67b72 | 2439 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 | 2440 | if (ses) { |
f96637be JP |
2441 | cifs_dbg(FYI, "Existing smb sess found (status=%d)\n", |
2442 | ses->status); | |
36988c76 | 2443 | |
36988c76 | 2444 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
2445 | rc = cifs_negotiate_protocol(xid, ses); |
2446 | if (rc) { | |
2447 | mutex_unlock(&ses->session_mutex); | |
2448 | /* problem -- put our ses reference */ | |
2449 | cifs_put_smb_ses(ses); | |
6d5786a3 | 2450 | free_xid(xid); |
198b5682 JL |
2451 | return ERR_PTR(rc); |
2452 | } | |
36988c76 | 2453 | if (ses->need_reconnect) { |
f96637be | 2454 | cifs_dbg(FYI, "Session needs reconnect\n"); |
36988c76 JL |
2455 | rc = cifs_setup_session(xid, ses, |
2456 | volume_info->local_nls); | |
2457 | if (rc) { | |
2458 | mutex_unlock(&ses->session_mutex); | |
2459 | /* problem -- put our reference */ | |
2460 | cifs_put_smb_ses(ses); | |
6d5786a3 | 2461 | free_xid(xid); |
36988c76 JL |
2462 | return ERR_PTR(rc); |
2463 | } | |
2464 | } | |
2465 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
2466 | |
2467 | /* existing SMB ses has a server reference already */ | |
2468 | cifs_put_tcp_session(server); | |
6d5786a3 | 2469 | free_xid(xid); |
36988c76 JL |
2470 | return ses; |
2471 | } | |
2472 | ||
f96637be | 2473 | cifs_dbg(FYI, "Existing smb sess not found\n"); |
36988c76 JL |
2474 | ses = sesInfoAlloc(); |
2475 | if (ses == NULL) | |
2476 | goto get_ses_fail; | |
2477 | ||
2478 | /* new SMB session uses our server ref */ | |
2479 | ses->server = server; | |
a9f1b85e PS |
2480 | if (server->dstaddr.ss_family == AF_INET6) |
2481 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 2482 | else |
a9f1b85e | 2483 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 2484 | |
8727c8a8 SF |
2485 | if (volume_info->username) { |
2486 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
2487 | if (!ses->user_name) | |
2488 | goto get_ses_fail; | |
2489 | } | |
36988c76 JL |
2490 | |
2491 | /* volume_info->password freed at unmount */ | |
2492 | if (volume_info->password) { | |
2493 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2494 | if (!ses->password) | |
2495 | goto get_ses_fail; | |
2496 | } | |
2497 | if (volume_info->domainname) { | |
d3686d54 SP |
2498 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
2499 | if (!ses->domainName) | |
2500 | goto get_ses_fail; | |
36988c76 | 2501 | } |
3e4b3e1f | 2502 | ses->cred_uid = volume_info->cred_uid; |
36988c76 | 2503 | ses->linux_uid = volume_info->linux_uid; |
d9b94201 | 2504 | |
28e11bd8 JL |
2505 | ses->sectype = volume_info->sectype; |
2506 | ses->sign = volume_info->sign; | |
36988c76 JL |
2507 | |
2508 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
2509 | rc = cifs_negotiate_protocol(xid, ses); |
2510 | if (!rc) | |
2511 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 2512 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 2513 | if (rc) |
36988c76 JL |
2514 | goto get_ses_fail; |
2515 | ||
2516 | /* success, put it on the list */ | |
3f9bcca7 | 2517 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 2518 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 2519 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 | 2520 | |
6d5786a3 | 2521 | free_xid(xid); |
36988c76 JL |
2522 | return ses; |
2523 | ||
2524 | get_ses_fail: | |
2525 | sesInfoFree(ses); | |
6d5786a3 | 2526 | free_xid(xid); |
36988c76 JL |
2527 | return ERR_PTR(rc); |
2528 | } | |
2529 | ||
96daf2b0 | 2530 | static int match_tcon(struct cifs_tcon *tcon, const char *unc) |
37bb04e5 PS |
2531 | { |
2532 | if (tcon->tidStatus == CifsExiting) | |
2533 | return 0; | |
2534 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) | |
2535 | return 0; | |
2536 | return 1; | |
2537 | } | |
2538 | ||
96daf2b0 SF |
2539 | static struct cifs_tcon * |
2540 | cifs_find_tcon(struct cifs_ses *ses, const char *unc) | |
f1987b44 JL |
2541 | { |
2542 | struct list_head *tmp; | |
96daf2b0 | 2543 | struct cifs_tcon *tcon; |
f1987b44 | 2544 | |
3f9bcca7 | 2545 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2546 | list_for_each(tmp, &ses->tcon_list) { |
96daf2b0 | 2547 | tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
37bb04e5 | 2548 | if (!match_tcon(tcon, unc)) |
f1987b44 | 2549 | continue; |
f1987b44 | 2550 | ++tcon->tc_count; |
3f9bcca7 | 2551 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2552 | return tcon; |
1da177e4 | 2553 | } |
3f9bcca7 | 2554 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2555 | return NULL; |
2556 | } | |
2557 | ||
f1987b44 | 2558 | static void |
96daf2b0 | 2559 | cifs_put_tcon(struct cifs_tcon *tcon) |
f1987b44 | 2560 | { |
2e6e02ab | 2561 | unsigned int xid; |
96daf2b0 | 2562 | struct cifs_ses *ses = tcon->ses; |
f1987b44 | 2563 | |
f96637be | 2564 | cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
3f9bcca7 | 2565 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2566 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 2567 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2568 | return; |
2569 | } | |
2570 | ||
2571 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 2572 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 | 2573 | |
6d5786a3 | 2574 | xid = get_xid(); |
2e6e02ab PS |
2575 | if (ses->server->ops->tree_disconnect) |
2576 | ses->server->ops->tree_disconnect(xid, tcon); | |
6d5786a3 | 2577 | _free_xid(xid); |
f1987b44 | 2578 | |
d03382ce | 2579 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 2580 | tconInfoFree(tcon); |
f1987b44 JL |
2581 | cifs_put_smb_ses(ses); |
2582 | } | |
2583 | ||
96daf2b0 SF |
2584 | static struct cifs_tcon * |
2585 | cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) | |
d00c28de JL |
2586 | { |
2587 | int rc, xid; | |
96daf2b0 | 2588 | struct cifs_tcon *tcon; |
d00c28de JL |
2589 | |
2590 | tcon = cifs_find_tcon(ses, volume_info->UNC); | |
2591 | if (tcon) { | |
f96637be | 2592 | cifs_dbg(FYI, "Found match on UNC path\n"); |
d00c28de JL |
2593 | /* existing tcon already has a reference */ |
2594 | cifs_put_smb_ses(ses); | |
2595 | if (tcon->seal != volume_info->seal) | |
f96637be | 2596 | cifs_dbg(VFS, "transport encryption setting conflicts with existing tid\n"); |
d00c28de JL |
2597 | return tcon; |
2598 | } | |
2599 | ||
2e6e02ab PS |
2600 | if (!ses->server->ops->tree_connect) { |
2601 | rc = -ENOSYS; | |
2602 | goto out_fail; | |
2603 | } | |
2604 | ||
d00c28de JL |
2605 | tcon = tconInfoAlloc(); |
2606 | if (tcon == NULL) { | |
2607 | rc = -ENOMEM; | |
2608 | goto out_fail; | |
2609 | } | |
2610 | ||
2611 | tcon->ses = ses; | |
2612 | if (volume_info->password) { | |
2613 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2614 | if (!tcon->password) { | |
2615 | rc = -ENOMEM; | |
2616 | goto out_fail; | |
2617 | } | |
2618 | } | |
2619 | ||
2e6e02ab PS |
2620 | /* |
2621 | * BB Do we need to wrap session_mutex around this TCon call and Unix | |
2622 | * SetFS as we do on SessSetup and reconnect? | |
2623 | */ | |
6d5786a3 | 2624 | xid = get_xid(); |
2e6e02ab PS |
2625 | rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon, |
2626 | volume_info->local_nls); | |
6d5786a3 | 2627 | free_xid(xid); |
f96637be | 2628 | cifs_dbg(FYI, "Tcon rc = %d\n", rc); |
d00c28de JL |
2629 | if (rc) |
2630 | goto out_fail; | |
2631 | ||
2632 | if (volume_info->nodfs) { | |
2633 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
f96637be | 2634 | cifs_dbg(FYI, "DFS disabled (%d)\n", tcon->Flags); |
d00c28de JL |
2635 | } |
2636 | tcon->seal = volume_info->seal; | |
2e6e02ab PS |
2637 | /* |
2638 | * We can have only one retry value for a connection to a share so for | |
2639 | * resources mounted more than once to the same server share the last | |
2640 | * value passed in for the retry flag is used. | |
2641 | */ | |
d00c28de JL |
2642 | tcon->retry = volume_info->retry; |
2643 | tcon->nocase = volume_info->nocase; | |
2644 | tcon->local_lease = volume_info->local_lease; | |
233839b1 | 2645 | INIT_LIST_HEAD(&tcon->pending_opens); |
d00c28de | 2646 | |
3f9bcca7 | 2647 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 2648 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 2649 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 2650 | |
d03382ce SJ |
2651 | cifs_fscache_get_super_cookie(tcon); |
2652 | ||
d00c28de JL |
2653 | return tcon; |
2654 | ||
2655 | out_fail: | |
2656 | tconInfoFree(tcon); | |
2657 | return ERR_PTR(rc); | |
2658 | } | |
2659 | ||
9d002df4 JL |
2660 | void |
2661 | cifs_put_tlink(struct tcon_link *tlink) | |
2662 | { | |
2663 | if (!tlink || IS_ERR(tlink)) | |
2664 | return; | |
2665 | ||
2666 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
2667 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
2668 | tlink->tl_time = jiffies; | |
2669 | return; | |
2670 | } | |
2671 | ||
2672 | if (!IS_ERR(tlink_tcon(tlink))) | |
2673 | cifs_put_tcon(tlink_tcon(tlink)); | |
2674 | kfree(tlink); | |
2675 | return; | |
2676 | } | |
d00c28de | 2677 | |
25c7f41e | 2678 | static inline struct tcon_link * |
cd51875d PS |
2679 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
2680 | { | |
2681 | return cifs_sb->master_tlink; | |
2682 | } | |
25c7f41e PS |
2683 | |
2684 | static int | |
2685 | compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
2686 | { | |
2687 | struct cifs_sb_info *old = CIFS_SB(sb); | |
2688 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
2689 | ||
2690 | if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) | |
2691 | return 0; | |
2692 | ||
2693 | if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) != | |
2694 | (new->mnt_cifs_flags & CIFS_MOUNT_MASK)) | |
2695 | return 0; | |
2696 | ||
25c7f41e | 2697 | /* |
5eba8ab3 JL |
2698 | * We want to share sb only if we don't specify an r/wsize or |
2699 | * specified r/wsize is greater than or equal to existing one. | |
25c7f41e PS |
2700 | */ |
2701 | if (new->wsize && new->wsize < old->wsize) | |
2702 | return 0; | |
2703 | ||
5eba8ab3 JL |
2704 | if (new->rsize && new->rsize < old->rsize) |
2705 | return 0; | |
2706 | ||
1f68233c | 2707 | if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid)) |
25c7f41e PS |
2708 | return 0; |
2709 | ||
2710 | if (old->mnt_file_mode != new->mnt_file_mode || | |
2711 | old->mnt_dir_mode != new->mnt_dir_mode) | |
2712 | return 0; | |
2713 | ||
2714 | if (strcmp(old->local_nls->charset, new->local_nls->charset)) | |
2715 | return 0; | |
2716 | ||
2717 | if (old->actimeo != new->actimeo) | |
2718 | return 0; | |
2719 | ||
2720 | return 1; | |
2721 | } | |
2722 | ||
2723 | int | |
2724 | cifs_match_super(struct super_block *sb, void *data) | |
2725 | { | |
2726 | struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; | |
2727 | struct smb_vol *volume_info; | |
2728 | struct cifs_sb_info *cifs_sb; | |
2729 | struct TCP_Server_Info *tcp_srv; | |
96daf2b0 SF |
2730 | struct cifs_ses *ses; |
2731 | struct cifs_tcon *tcon; | |
25c7f41e | 2732 | struct tcon_link *tlink; |
25c7f41e PS |
2733 | int rc = 0; |
2734 | ||
25c7f41e PS |
2735 | spin_lock(&cifs_tcp_ses_lock); |
2736 | cifs_sb = CIFS_SB(sb); | |
2737 | tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
2738 | if (IS_ERR(tlink)) { | |
2739 | spin_unlock(&cifs_tcp_ses_lock); | |
2740 | return rc; | |
2741 | } | |
2742 | tcon = tlink_tcon(tlink); | |
2743 | ses = tcon->ses; | |
2744 | tcp_srv = ses->server; | |
2745 | ||
2746 | volume_info = mnt_data->vol; | |
2747 | ||
9fa114f7 | 2748 | if (!match_server(tcp_srv, volume_info) || |
25c7f41e PS |
2749 | !match_session(ses, volume_info) || |
2750 | !match_tcon(tcon, volume_info->UNC)) { | |
2751 | rc = 0; | |
2752 | goto out; | |
2753 | } | |
2754 | ||
2755 | rc = compare_mount_options(sb, mnt_data); | |
2756 | out: | |
25c7f41e | 2757 | spin_unlock(&cifs_tcp_ses_lock); |
f484b5d0 | 2758 | cifs_put_tlink(tlink); |
25c7f41e PS |
2759 | return rc; |
2760 | } | |
2761 | ||
1da177e4 | 2762 | int |
b669f33c | 2763 | get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path, |
2e6e02ab PS |
2764 | const struct nls_table *nls_codepage, unsigned int *num_referrals, |
2765 | struct dfs_info3_param **referrals, int remap) | |
1da177e4 LT |
2766 | { |
2767 | char *temp_unc; | |
2768 | int rc = 0; | |
2769 | ||
b669f33c | 2770 | if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer) |
2e6e02ab PS |
2771 | return -ENOSYS; |
2772 | ||
2773 | *num_referrals = 0; | |
2774 | *referrals = NULL; | |
1da177e4 | 2775 | |
2e6e02ab | 2776 | if (ses->ipc_tid == 0) { |
1da177e4 | 2777 | temp_unc = kmalloc(2 /* for slashes */ + |
2e6e02ab PS |
2778 | strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2) |
2779 | + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL); | |
1da177e4 LT |
2780 | if (temp_unc == NULL) |
2781 | return -ENOMEM; | |
2782 | temp_unc[0] = '\\'; | |
2783 | temp_unc[1] = '\\'; | |
2e6e02ab PS |
2784 | strcpy(temp_unc + 2, ses->serverName); |
2785 | strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$"); | |
2786 | rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL, | |
2787 | nls_codepage); | |
f96637be | 2788 | cifs_dbg(FYI, "Tcon rc = %d ipc_tid = %d\n", rc, ses->ipc_tid); |
1da177e4 LT |
2789 | kfree(temp_unc); |
2790 | } | |
2791 | if (rc == 0) | |
b669f33c PS |
2792 | rc = ses->server->ops->get_dfs_refer(xid, ses, old_path, |
2793 | referrals, num_referrals, | |
2794 | nls_codepage, remap); | |
2e6e02ab PS |
2795 | /* |
2796 | * BB - map targetUNCs to dfs_info3 structures, here or in | |
b669f33c | 2797 | * ses->server->ops->get_dfs_refer. |
2e6e02ab | 2798 | */ |
1da177e4 LT |
2799 | |
2800 | return rc; | |
2801 | } | |
2802 | ||
09e50d55 JL |
2803 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
2804 | static struct lock_class_key cifs_key[2]; | |
2805 | static struct lock_class_key cifs_slock_key[2]; | |
2806 | ||
2807 | static inline void | |
2808 | cifs_reclassify_socket4(struct socket *sock) | |
2809 | { | |
2810 | struct sock *sk = sock->sk; | |
2811 | BUG_ON(sock_owned_by_user(sk)); | |
2812 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", | |
2813 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
2814 | } | |
2815 | ||
2816 | static inline void | |
2817 | cifs_reclassify_socket6(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_INET6-CIFS", | |
2822 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
2823 | } | |
2824 | #else | |
2825 | static inline void | |
2826 | cifs_reclassify_socket4(struct socket *sock) | |
2827 | { | |
2828 | } | |
2829 | ||
2830 | static inline void | |
2831 | cifs_reclassify_socket6(struct socket *sock) | |
2832 | { | |
2833 | } | |
2834 | #endif | |
2835 | ||
1da177e4 | 2836 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 2837 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 2838 | { |
50c2f753 | 2839 | unsigned int i, j; |
1da177e4 | 2840 | |
50c2f753 | 2841 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
2842 | /* mask a nibble at a time and encode */ |
2843 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
2844 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 2845 | j += 2; |
1da177e4 LT |
2846 | } |
2847 | ||
2848 | } | |
2849 | ||
3eb9a889 BG |
2850 | static int |
2851 | bind_socket(struct TCP_Server_Info *server) | |
2852 | { | |
2853 | int rc = 0; | |
2854 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
2855 | /* Bind to the specified local IP address */ | |
2856 | struct socket *socket = server->ssocket; | |
2857 | rc = socket->ops->bind(socket, | |
2858 | (struct sockaddr *) &server->srcaddr, | |
2859 | sizeof(server->srcaddr)); | |
2860 | if (rc < 0) { | |
2861 | struct sockaddr_in *saddr4; | |
2862 | struct sockaddr_in6 *saddr6; | |
2863 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
2864 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
2865 | if (saddr6->sin6_family == AF_INET6) | |
f96637be JP |
2866 | cifs_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n", |
2867 | &saddr6->sin6_addr, rc); | |
3eb9a889 | 2868 | else |
f96637be JP |
2869 | cifs_dbg(VFS, "Failed to bind to: %pI4, error: %d\n", |
2870 | &saddr4->sin_addr.s_addr, rc); | |
3eb9a889 BG |
2871 | } |
2872 | } | |
2873 | return rc; | |
2874 | } | |
1da177e4 LT |
2875 | |
2876 | static int | |
a9f1b85e | 2877 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
2878 | { |
2879 | int rc = 0; | |
a9f1b85e PS |
2880 | /* |
2881 | * some servers require RFC1001 sessinit before sending | |
2882 | * negprot - BB check reconnection in case where second | |
2883 | * sessinit is sent but no second negprot | |
2884 | */ | |
2885 | struct rfc1002_session_packet *ses_init_buf; | |
2886 | struct smb_hdr *smb_buf; | |
2887 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
2888 | GFP_KERNEL); | |
2889 | if (ses_init_buf) { | |
2890 | ses_init_buf->trailer.session_req.called_len = 32; | |
2891 | ||
2892 | if (server->server_RFC1001_name && | |
2893 | server->server_RFC1001_name[0] != 0) | |
2894 | rfc1002mangle(ses_init_buf->trailer. | |
2895 | session_req.called_name, | |
2896 | server->server_RFC1001_name, | |
2897 | RFC1001_NAME_LEN_WITH_NULL); | |
2898 | else | |
2899 | rfc1002mangle(ses_init_buf->trailer. | |
2900 | session_req.called_name, | |
2901 | DEFAULT_CIFS_CALLED_NAME, | |
2902 | RFC1001_NAME_LEN_WITH_NULL); | |
2903 | ||
2904 | ses_init_buf->trailer.session_req.calling_len = 32; | |
2905 | ||
2906 | /* | |
2907 | * calling name ends in null (byte 16) from old smb | |
2908 | * convention. | |
2909 | */ | |
2910 | if (server->workstation_RFC1001_name && | |
2911 | server->workstation_RFC1001_name[0] != 0) | |
2912 | rfc1002mangle(ses_init_buf->trailer. | |
2913 | session_req.calling_name, | |
2914 | server->workstation_RFC1001_name, | |
2915 | RFC1001_NAME_LEN_WITH_NULL); | |
2916 | else | |
2917 | rfc1002mangle(ses_init_buf->trailer. | |
2918 | session_req.calling_name, | |
2919 | "LINUX_CIFS_CLNT", | |
2920 | RFC1001_NAME_LEN_WITH_NULL); | |
2921 | ||
2922 | ses_init_buf->trailer.session_req.scope1 = 0; | |
2923 | ses_init_buf->trailer.session_req.scope2 = 0; | |
2924 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
2925 | ||
2926 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
be8e3b00 | 2927 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
a9f1b85e PS |
2928 | rc = smb_send(server, smb_buf, 0x44); |
2929 | kfree(ses_init_buf); | |
2930 | /* | |
2931 | * RFC1001 layer in at least one server | |
2932 | * requires very short break before negprot | |
2933 | * presumably because not expecting negprot | |
2934 | * to follow so fast. This is a simple | |
2935 | * solution that works without | |
2936 | * complicating the code and causes no | |
2937 | * significant slowing down on mount | |
2938 | * for everyone else | |
2939 | */ | |
2940 | usleep_range(1000, 2000); | |
2941 | } | |
2942 | /* | |
2943 | * else the negprot may still work without this | |
2944 | * even though malloc failed | |
2945 | */ | |
2946 | ||
2947 | return rc; | |
2948 | } | |
2949 | ||
2950 | static int | |
2951 | generic_ip_connect(struct TCP_Server_Info *server) | |
2952 | { | |
2953 | int rc = 0; | |
6da97910 | 2954 | __be16 sport; |
a9f1b85e | 2955 | int slen, sfamily; |
bcf4b106 | 2956 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
2957 | struct sockaddr *saddr; |
2958 | ||
2959 | saddr = (struct sockaddr *) &server->dstaddr; | |
2960 | ||
2961 | if (server->dstaddr.ss_family == AF_INET6) { | |
2962 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
2963 | slen = sizeof(struct sockaddr_in6); | |
2964 | sfamily = AF_INET6; | |
2965 | } else { | |
2966 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
2967 | slen = sizeof(struct sockaddr_in); | |
2968 | sfamily = AF_INET; | |
2969 | } | |
1da177e4 | 2970 | |
bcf4b106 | 2971 | if (socket == NULL) { |
f1d0c998 RL |
2972 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
2973 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 2974 | if (rc < 0) { |
f96637be | 2975 | cifs_dbg(VFS, "Error %d creating socket\n", rc); |
a9f1b85e | 2976 | server->ssocket = NULL; |
1da177e4 | 2977 | return rc; |
1da177e4 | 2978 | } |
bcf4b106 JL |
2979 | |
2980 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
f96637be | 2981 | cifs_dbg(FYI, "Socket created\n"); |
bcf4b106 JL |
2982 | server->ssocket = socket; |
2983 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
2984 | if (sfamily == AF_INET6) |
2985 | cifs_reclassify_socket6(socket); | |
2986 | else | |
2987 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
2988 | } |
2989 | ||
3eb9a889 BG |
2990 | rc = bind_socket(server); |
2991 | if (rc < 0) | |
2992 | return rc; | |
2993 | ||
bcf4b106 JL |
2994 | /* |
2995 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
2996 | * the default. sock_setsockopt not used because it expects |
2997 | * user space buffer | |
bcf4b106 JL |
2998 | */ |
2999 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 3000 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 3001 | |
b387eaeb | 3002 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
3003 | if (server->noautotune) { |
3004 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
3005 | socket->sk->sk_sndbuf = 200 * 1024; | |
3006 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
3007 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 3008 | } |
1da177e4 | 3009 | |
6a5fa236 | 3010 | if (server->tcp_nodelay) { |
a9f1b85e | 3011 | int val = 1; |
6a5fa236 SF |
3012 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
3013 | (char *)&val, sizeof(val)); | |
3014 | if (rc) | |
f96637be JP |
3015 | cifs_dbg(FYI, "set TCP_NODELAY socket option error %d\n", |
3016 | rc); | |
6a5fa236 SF |
3017 | } |
3018 | ||
f96637be | 3019 | cifs_dbg(FYI, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n", |
bcf4b106 | 3020 | socket->sk->sk_sndbuf, |
b6b38f70 | 3021 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 3022 | |
ee1b3ea9 JL |
3023 | rc = socket->ops->connect(socket, saddr, slen, 0); |
3024 | if (rc < 0) { | |
f96637be | 3025 | cifs_dbg(FYI, "Error %d connecting to server\n", rc); |
ee1b3ea9 JL |
3026 | sock_release(socket); |
3027 | server->ssocket = NULL; | |
3028 | return rc; | |
3029 | } | |
3030 | ||
a9f1b85e PS |
3031 | if (sport == htons(RFC1001_PORT)) |
3032 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 3033 | |
1da177e4 LT |
3034 | return rc; |
3035 | } | |
3036 | ||
3037 | static int | |
a9f1b85e | 3038 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 3039 | { |
6da97910 | 3040 | __be16 *sport; |
a9f1b85e PS |
3041 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
3042 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 3043 | |
a9f1b85e PS |
3044 | if (server->dstaddr.ss_family == AF_INET6) |
3045 | sport = &addr6->sin6_port; | |
3046 | else | |
3047 | sport = &addr->sin_port; | |
1da177e4 | 3048 | |
a9f1b85e PS |
3049 | if (*sport == 0) { |
3050 | int rc; | |
1da177e4 | 3051 | |
a9f1b85e PS |
3052 | /* try with 445 port at first */ |
3053 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 3054 | |
a9f1b85e | 3055 | rc = generic_ip_connect(server); |
1da177e4 | 3056 | if (rc >= 0) |
a9f1b85e | 3057 | return rc; |
6a5fa236 | 3058 | |
a9f1b85e PS |
3059 | /* if it failed, try with 139 port */ |
3060 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
3061 | } |
3062 | ||
a9f1b85e | 3063 | return generic_ip_connect(server); |
1da177e4 LT |
3064 | } |
3065 | ||
6d5786a3 | 3066 | void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon, |
2c6292ae | 3067 | struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) |
8af18971 SF |
3068 | { |
3069 | /* if we are reconnecting then should we check to see if | |
3070 | * any requested capabilities changed locally e.g. via | |
3071 | * remount but we can not do much about it here | |
3072 | * if they have (even if we could detect it by the following) | |
3073 | * Perhaps we could add a backpointer to array of sb from tcon | |
3074 | * or if we change to make all sb to same share the same | |
3075 | * sb as NFS - then we only have one backpointer to sb. | |
3076 | * What if we wanted to mount the server share twice once with | |
3077 | * and once without posixacls or posix paths? */ | |
3078 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 3079 | |
c18c842b SF |
3080 | if (vol_info && vol_info->no_linux_ext) { |
3081 | tcon->fsUnixInfo.Capability = 0; | |
3082 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
f96637be | 3083 | cifs_dbg(FYI, "Linux protocol extensions disabled\n"); |
c18c842b SF |
3084 | return; |
3085 | } else if (vol_info) | |
3086 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
3087 | ||
3088 | if (tcon->unix_ext == 0) { | |
f96637be | 3089 | cifs_dbg(FYI, "Unix extensions disabled so not set on reconnect\n"); |
c18c842b SF |
3090 | return; |
3091 | } | |
50c2f753 | 3092 | |
fb8c4b14 | 3093 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 3094 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
f96637be | 3095 | cifs_dbg(FYI, "unix caps which server supports %lld\n", cap); |
8af18971 SF |
3096 | /* check for reconnect case in which we do not |
3097 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 3098 | if (vol_info == NULL) { |
50c2f753 | 3099 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
3100 | originally at mount time */ |
3101 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
3102 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
3103 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
3104 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
f96637be | 3105 | cifs_dbg(VFS, "POSIXPATH support change\n"); |
8af18971 | 3106 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 3107 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
f96637be JP |
3108 | cifs_dbg(VFS, "possible reconnect error\n"); |
3109 | cifs_dbg(VFS, "server disabled POSIX path support\n"); | |
11b6d645 | 3110 | } |
8af18971 | 3111 | } |
50c2f753 | 3112 | |
6848b733 | 3113 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
f96637be | 3114 | cifs_dbg(VFS, "per-share encryption not supported yet\n"); |
6848b733 | 3115 | |
8af18971 | 3116 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 3117 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 3118 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 3119 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
f96637be | 3120 | cifs_dbg(FYI, "negotiated posix acl support\n"); |
2c6292ae AV |
3121 | if (cifs_sb) |
3122 | cifs_sb->mnt_cifs_flags |= | |
3123 | CIFS_MOUNT_POSIXACL; | |
8af18971 SF |
3124 | } |
3125 | ||
75865f8c | 3126 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 3127 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 3128 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
f96637be | 3129 | cifs_dbg(FYI, "negotiate posix pathnames\n"); |
2c6292ae AV |
3130 | if (cifs_sb) |
3131 | cifs_sb->mnt_cifs_flags |= | |
8af18971 SF |
3132 | CIFS_MOUNT_POSIX_PATHS; |
3133 | } | |
50c2f753 | 3134 | |
f96637be | 3135 | cifs_dbg(FYI, "Negotiate caps 0x%x\n", (int)cap); |
8af18971 | 3136 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 3137 | if (cap & CIFS_UNIX_FCNTL_CAP) |
f96637be | 3138 | cifs_dbg(FYI, "FCNTL cap\n"); |
75865f8c | 3139 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
f96637be | 3140 | cifs_dbg(FYI, "EXTATTR cap\n"); |
75865f8c | 3141 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
f96637be | 3142 | cifs_dbg(FYI, "POSIX path cap\n"); |
75865f8c | 3143 | if (cap & CIFS_UNIX_XATTR_CAP) |
f96637be | 3144 | cifs_dbg(FYI, "XATTR cap\n"); |
75865f8c | 3145 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
f96637be | 3146 | cifs_dbg(FYI, "POSIX ACL cap\n"); |
75865f8c | 3147 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
f96637be | 3148 | cifs_dbg(FYI, "very large read cap\n"); |
75865f8c | 3149 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
f96637be | 3150 | cifs_dbg(FYI, "very large write cap\n"); |
6848b733 | 3151 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
f96637be | 3152 | cifs_dbg(FYI, "transport encryption cap\n"); |
6848b733 | 3153 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
f96637be | 3154 | cifs_dbg(FYI, "mandatory transport encryption cap\n"); |
8af18971 SF |
3155 | #endif /* CIFS_DEBUG2 */ |
3156 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 3157 | if (vol_info == NULL) { |
f96637be | 3158 | cifs_dbg(FYI, "resetting capabilities failed\n"); |
442aa310 | 3159 | } else |
f96637be | 3160 | cifs_dbg(VFS, "Negotiating Unix capabilities with the server failed. Consider mounting with the Unix Extensions disabled if problems are found by specifying the nounix mount option.\n"); |
5a44b319 | 3161 | |
8af18971 SF |
3162 | } |
3163 | } | |
3164 | } | |
3165 | ||
724d9f1c PS |
3166 | void cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
3167 | struct cifs_sb_info *cifs_sb) | |
b1c8d2b4 | 3168 | { |
2de970ff JL |
3169 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
3170 | ||
2ced6f69 AV |
3171 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
3172 | cifs_sb->tlink_tree = RB_ROOT; | |
3173 | ||
25c7f41e | 3174 | /* |
5eba8ab3 JL |
3175 | * Temporarily set r/wsize for matching superblock. If we end up using |
3176 | * new sb then client will later negotiate it downward if needed. | |
25c7f41e | 3177 | */ |
5eba8ab3 | 3178 | cifs_sb->rsize = pvolume_info->rsize; |
25c7f41e PS |
3179 | cifs_sb->wsize = pvolume_info->wsize; |
3180 | ||
3b795210 SF |
3181 | cifs_sb->mnt_uid = pvolume_info->linux_uid; |
3182 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
3183 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
3184 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
f96637be JP |
3185 | cifs_dbg(FYI, "file mode: 0x%hx dir mode: 0x%hx\n", |
3186 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); | |
3b795210 | 3187 | |
6d20e840 | 3188 | cifs_sb->actimeo = pvolume_info->actimeo; |
724d9f1c | 3189 | cifs_sb->local_nls = pvolume_info->local_nls; |
6d20e840 | 3190 | |
3b795210 SF |
3191 | if (pvolume_info->noperm) |
3192 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
3193 | if (pvolume_info->setuids) | |
3194 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
3195 | if (pvolume_info->server_ino) | |
3196 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
3197 | if (pvolume_info->remap) | |
3198 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; | |
3199 | if (pvolume_info->no_xattr) | |
3200 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
3201 | if (pvolume_info->sfu_emul) | |
3202 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
3203 | if (pvolume_info->nobrl) | |
3204 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 3205 | if (pvolume_info->nostrictsync) |
4717bed6 | 3206 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
3207 | if (pvolume_info->mand_lock) |
3208 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
d4ffff1f PS |
3209 | if (pvolume_info->rwpidforward) |
3210 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; | |
3b795210 SF |
3211 | if (pvolume_info->cifs_acl) |
3212 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
3c7c87fd | 3213 | if (pvolume_info->backupuid_specified) { |
3d3ea8e6 | 3214 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; |
3c7c87fd SP |
3215 | cifs_sb->mnt_backupuid = pvolume_info->backupuid; |
3216 | } | |
3217 | if (pvolume_info->backupgid_specified) { | |
3d3ea8e6 | 3218 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; |
3c7c87fd SP |
3219 | cifs_sb->mnt_backupgid = pvolume_info->backupgid; |
3220 | } | |
3b795210 SF |
3221 | if (pvolume_info->override_uid) |
3222 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
3223 | if (pvolume_info->override_gid) | |
3224 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
3225 | if (pvolume_info->dynperm) | |
3226 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
3227 | if (pvolume_info->fsc) |
3228 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
3229 | if (pvolume_info->multiuser) |
3230 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
3231 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
3232 | if (pvolume_info->strict_io) |
3233 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 3234 | if (pvolume_info->direct_io) { |
f96637be | 3235 | cifs_dbg(FYI, "mounting share using direct i/o\n"); |
3b795210 SF |
3236 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
3237 | } | |
736a3320 SM |
3238 | if (pvolume_info->mfsymlinks) { |
3239 | if (pvolume_info->sfu_emul) { | |
f96637be | 3240 | cifs_dbg(VFS, "mount option mfsymlinks ignored if sfu mount option is used\n"); |
736a3320 SM |
3241 | } else { |
3242 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; | |
3243 | } | |
3244 | } | |
3b795210 SF |
3245 | |
3246 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
f96637be | 3247 | cifs_dbg(VFS, "mount option dynperm ignored if cifsacl mount option supported\n"); |
b1c8d2b4 JL |
3248 | } |
3249 | ||
b9bce2e9 JL |
3250 | static void |
3251 | cleanup_volume_info_contents(struct smb_vol *volume_info) | |
1bfe73c2 | 3252 | { |
b946845a | 3253 | kfree(volume_info->username); |
1bfe73c2 | 3254 | kzfree(volume_info->password); |
95c75454 | 3255 | kfree(volume_info->UNC); |
b946845a SF |
3256 | kfree(volume_info->domainname); |
3257 | kfree(volume_info->iocharset); | |
1bfe73c2 | 3258 | kfree(volume_info->prepath); |
b9bce2e9 JL |
3259 | } |
3260 | ||
3261 | void | |
3262 | cifs_cleanup_volume_info(struct smb_vol *volume_info) | |
3263 | { | |
3264 | if (!volume_info) | |
3265 | return; | |
3266 | cleanup_volume_info_contents(volume_info); | |
1bfe73c2 | 3267 | kfree(volume_info); |
1bfe73c2 IM |
3268 | } |
3269 | ||
b9bce2e9 | 3270 | |
2d6d589d | 3271 | #ifdef CONFIG_CIFS_DFS_UPCALL |
6d3ea7e4 SF |
3272 | /* |
3273 | * cifs_build_path_to_root returns full path to root when we do not have an | |
3274 | * exiting connection (tcon) | |
3275 | */ | |
1bfe73c2 | 3276 | static char * |
b2a0fa15 | 3277 | build_unc_path_to_root(const struct smb_vol *vol, |
1bfe73c2 IM |
3278 | const struct cifs_sb_info *cifs_sb) |
3279 | { | |
b2a0fa15 | 3280 | char *full_path, *pos; |
839db3d1 | 3281 | unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0; |
b2a0fa15 | 3282 | unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); |
1bfe73c2 | 3283 | |
b2a0fa15 | 3284 | full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); |
1bfe73c2 IM |
3285 | if (full_path == NULL) |
3286 | return ERR_PTR(-ENOMEM); | |
3287 | ||
b2a0fa15 JL |
3288 | strncpy(full_path, vol->UNC, unc_len); |
3289 | pos = full_path + unc_len; | |
3290 | ||
3291 | if (pplen) { | |
1fc29bac JL |
3292 | *pos = CIFS_DIR_SEP(cifs_sb); |
3293 | strncpy(pos + 1, vol->prepath, pplen); | |
b2a0fa15 JL |
3294 | pos += pplen; |
3295 | } | |
3296 | ||
3297 | *pos = '\0'; /* add trailing null */ | |
f87d39d9 | 3298 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
f96637be | 3299 | cifs_dbg(FYI, "%s: full_path=%s\n", __func__, full_path); |
1bfe73c2 IM |
3300 | return full_path; |
3301 | } | |
dd613945 SF |
3302 | |
3303 | /* | |
3304 | * Perform a dfs referral query for a share and (optionally) prefix | |
3305 | * | |
046462ab SF |
3306 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
3307 | * to a string containing updated options for the submount. Otherwise it | |
3308 | * will be left untouched. | |
dd613945 SF |
3309 | * |
3310 | * Returns the rc from get_dfs_path to the caller, which can be used to | |
3311 | * determine whether there were referrals. | |
3312 | */ | |
3313 | static int | |
b669f33c | 3314 | expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses, |
dd613945 | 3315 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, |
046462ab | 3316 | int check_prefix) |
dd613945 SF |
3317 | { |
3318 | int rc; | |
3319 | unsigned int num_referrals = 0; | |
3320 | struct dfs_info3_param *referrals = NULL; | |
3321 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; | |
3322 | ||
3323 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
3324 | if (IS_ERR(full_path)) | |
3325 | return PTR_ERR(full_path); | |
3326 | ||
3327 | /* For DFS paths, skip the first '\' of the UNC */ | |
3328 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; | |
3329 | ||
b669f33c | 3330 | rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls, |
dd613945 SF |
3331 | &num_referrals, &referrals, |
3332 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3333 | ||
3334 | if (!rc && num_referrals > 0) { | |
3335 | char *fake_devname = NULL; | |
3336 | ||
3337 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, | |
3338 | full_path + 1, referrals, | |
3339 | &fake_devname); | |
3340 | ||
3341 | free_dfs_info_array(referrals, num_referrals); | |
046462ab | 3342 | |
dd613945 SF |
3343 | if (IS_ERR(mdata)) { |
3344 | rc = PTR_ERR(mdata); | |
3345 | mdata = NULL; | |
b9bce2e9 JL |
3346 | } else { |
3347 | cleanup_volume_info_contents(volume_info); | |
b9bce2e9 JL |
3348 | rc = cifs_setup_volume_info(volume_info, mdata, |
3349 | fake_devname); | |
dd613945 | 3350 | } |
b9bce2e9 JL |
3351 | kfree(fake_devname); |
3352 | kfree(cifs_sb->mountdata); | |
046462ab | 3353 | cifs_sb->mountdata = mdata; |
dd613945 SF |
3354 | } |
3355 | kfree(full_path); | |
3356 | return rc; | |
3357 | } | |
2d6d589d | 3358 | #endif |
1bfe73c2 | 3359 | |
04db79b0 JL |
3360 | static int |
3361 | cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, | |
3362 | const char *devname) | |
1da177e4 | 3363 | { |
724d9f1c | 3364 | int rc = 0; |
1da177e4 | 3365 | |
04db79b0 JL |
3366 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) |
3367 | return -EINVAL; | |
1da177e4 | 3368 | |
7586b765 | 3369 | if (volume_info->nullauth) { |
f96637be | 3370 | cifs_dbg(FYI, "Anonymous login\n"); |
04febabc JL |
3371 | kfree(volume_info->username); |
3372 | volume_info->username = NULL; | |
7586b765 | 3373 | } else if (volume_info->username) { |
1da177e4 | 3374 | /* BB fixme parse for domain name here */ |
f96637be | 3375 | cifs_dbg(FYI, "Username: %s\n", volume_info->username); |
1da177e4 | 3376 | } else { |
f96637be | 3377 | cifs_dbg(VFS, "No username specified\n"); |
50c2f753 SF |
3378 | /* In userspace mount helper we can get user name from alternate |
3379 | locations such as env variables and files on disk */ | |
04db79b0 | 3380 | return -EINVAL; |
1da177e4 LT |
3381 | } |
3382 | ||
1da177e4 | 3383 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 3384 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
3385 | /* load_nls_default cannot return null */ |
3386 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 3387 | } else { |
a5fc4ce0 JL |
3388 | volume_info->local_nls = load_nls(volume_info->iocharset); |
3389 | if (volume_info->local_nls == NULL) { | |
f96637be | 3390 | cifs_dbg(VFS, "CIFS mount error: iocharset %s not found\n", |
b6b38f70 | 3391 | volume_info->iocharset); |
04db79b0 | 3392 | return -ELIBACC; |
1da177e4 LT |
3393 | } |
3394 | } | |
724d9f1c | 3395 | |
724d9f1c PS |
3396 | return rc; |
3397 | } | |
3398 | ||
04db79b0 JL |
3399 | struct smb_vol * |
3400 | cifs_get_volume_info(char *mount_data, const char *devname) | |
3401 | { | |
3402 | int rc; | |
3403 | struct smb_vol *volume_info; | |
3404 | ||
6ee9542a | 3405 | volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL); |
04db79b0 JL |
3406 | if (!volume_info) |
3407 | return ERR_PTR(-ENOMEM); | |
3408 | ||
3409 | rc = cifs_setup_volume_info(volume_info, mount_data, devname); | |
3410 | if (rc) { | |
3411 | cifs_cleanup_volume_info(volume_info); | |
3412 | volume_info = ERR_PTR(rc); | |
3413 | } | |
3414 | ||
3415 | return volume_info; | |
3416 | } | |
3417 | ||
724d9f1c | 3418 | int |
2c6292ae | 3419 | cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) |
724d9f1c | 3420 | { |
1daaae8f | 3421 | int rc; |
6d5786a3 | 3422 | unsigned int xid; |
af4281dc | 3423 | struct cifs_ses *ses; |
96daf2b0 | 3424 | struct cifs_tcon *tcon; |
af4281dc | 3425 | struct TCP_Server_Info *server; |
724d9f1c PS |
3426 | char *full_path; |
3427 | struct tcon_link *tlink; | |
3428 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
3429 | int referral_walks_count = 0; | |
20547490 | 3430 | #endif |
dd854466 AV |
3431 | |
3432 | rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); | |
3433 | if (rc) | |
3434 | return rc; | |
3435 | ||
20547490 | 3436 | #ifdef CONFIG_CIFS_DFS_UPCALL |
724d9f1c PS |
3437 | try_mount_again: |
3438 | /* cleanup activities if we're chasing a referral */ | |
3439 | if (referral_walks_count) { | |
3440 | if (tcon) | |
3441 | cifs_put_tcon(tcon); | |
af4281dc PS |
3442 | else if (ses) |
3443 | cifs_put_smb_ses(ses); | |
724d9f1c | 3444 | |
6d5786a3 | 3445 | free_xid(xid); |
724d9f1c PS |
3446 | } |
3447 | #endif | |
1daaae8f | 3448 | rc = 0; |
724d9f1c | 3449 | tcon = NULL; |
af4281dc PS |
3450 | ses = NULL; |
3451 | server = NULL; | |
724d9f1c PS |
3452 | full_path = NULL; |
3453 | tlink = NULL; | |
3454 | ||
6d5786a3 | 3455 | xid = get_xid(); |
1da177e4 | 3456 | |
63c038c2 | 3457 | /* get a reference to a tcp session */ |
af4281dc PS |
3458 | server = cifs_get_tcp_session(volume_info); |
3459 | if (IS_ERR(server)) { | |
3460 | rc = PTR_ERR(server); | |
dd854466 | 3461 | bdi_destroy(&cifs_sb->bdi); |
63c038c2 | 3462 | goto out; |
1da177e4 LT |
3463 | } |
3464 | ||
36988c76 | 3465 | /* get a reference to a SMB session */ |
af4281dc PS |
3466 | ses = cifs_get_smb_ses(server, volume_info); |
3467 | if (IS_ERR(ses)) { | |
3468 | rc = PTR_ERR(ses); | |
3469 | ses = NULL; | |
36988c76 | 3470 | goto mount_fail_check; |
1da177e4 | 3471 | } |
50c2f753 | 3472 | |
d00c28de | 3473 | /* search for existing tcon to this server share */ |
af4281dc | 3474 | tcon = cifs_get_tcon(ses, volume_info); |
d00c28de JL |
3475 | if (IS_ERR(tcon)) { |
3476 | rc = PTR_ERR(tcon); | |
3477 | tcon = NULL; | |
1bfe73c2 | 3478 | goto remote_path_check; |
d00c28de | 3479 | } |
1bfe73c2 | 3480 | |
d82c2df5 | 3481 | /* tell server which Unix caps we support */ |
29e20f9c | 3482 | if (cap_unix(tcon->ses)) { |
d82c2df5 SF |
3483 | /* reset of caps checks mount to see if unix extensions |
3484 | disabled for just this mount */ | |
2c6292ae | 3485 | reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info); |
6848b733 SF |
3486 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && |
3487 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & | |
3488 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) { | |
3489 | rc = -EACCES; | |
3490 | goto mount_fail_check; | |
3491 | } | |
3492 | } else | |
d82c2df5 | 3493 | tcon->unix_ext = 0; /* server does not support them */ |
c18c842b | 3494 | |
af4281dc PS |
3495 | /* do not care if a following call succeed - informational */ |
3496 | if (!tcon->ipc && server->ops->qfs_tcon) | |
3497 | server->ops->qfs_tcon(xid, tcon); | |
6848b733 | 3498 | |
24985c53 PS |
3499 | cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info); |
3500 | cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info); | |
f7910cbd | 3501 | |
66bfaadc | 3502 | /* tune readahead according to rsize */ |
8f71465c | 3503 | cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE; |
f7910cbd | 3504 | |
1bfe73c2 | 3505 | remote_path_check: |
c1508ca2 SF |
3506 | #ifdef CONFIG_CIFS_DFS_UPCALL |
3507 | /* | |
3508 | * Perform an unconditional check for whether there are DFS | |
3509 | * referrals for this path without prefix, to provide support | |
3510 | * for DFS referrals from w2k8 servers which don't seem to respond | |
3511 | * with PATH_NOT_COVERED to requests that include the prefix. | |
3512 | * Chase the referral if found, otherwise continue normally. | |
3513 | */ | |
3514 | if (referral_walks_count == 0) { | |
af4281dc PS |
3515 | int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, |
3516 | false); | |
c1508ca2 SF |
3517 | if (!refrc) { |
3518 | referral_walks_count++; | |
3519 | goto try_mount_again; | |
3520 | } | |
3521 | } | |
3522 | #endif | |
3523 | ||
f87d39d9 | 3524 | /* check if a whole path is not remote */ |
70945643 | 3525 | if (!rc && tcon) { |
68889f26 PS |
3526 | if (!server->ops->is_path_accessible) { |
3527 | rc = -ENOSYS; | |
3528 | goto mount_fail_check; | |
3529 | } | |
6d3ea7e4 SF |
3530 | /* |
3531 | * cifs_build_path_to_root works only when we have a valid tcon | |
3532 | */ | |
3533 | full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon); | |
e4cce94c IM |
3534 | if (full_path == NULL) { |
3535 | rc = -ENOMEM; | |
3536 | goto mount_fail_check; | |
3537 | } | |
68889f26 PS |
3538 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, |
3539 | full_path); | |
03ceace5 | 3540 | if (rc != 0 && rc != -EREMOTE) { |
e4cce94c IM |
3541 | kfree(full_path); |
3542 | goto mount_fail_check; | |
3543 | } | |
3544 | kfree(full_path); | |
3545 | } | |
3546 | ||
1bfe73c2 IM |
3547 | /* get referral if needed */ |
3548 | if (rc == -EREMOTE) { | |
d036f50f | 3549 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
3550 | if (referral_walks_count > MAX_NESTED_LINKS) { |
3551 | /* | |
3552 | * BB: when we implement proper loop detection, | |
3553 | * we will remove this check. But now we need it | |
3554 | * to prevent an indefinite loop if 'DFS tree' is | |
3555 | * misconfigured (i.e. has loops). | |
3556 | */ | |
3557 | rc = -ELOOP; | |
3558 | goto mount_fail_check; | |
3559 | } | |
1bfe73c2 | 3560 | |
af4281dc | 3561 | rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true); |
7b91e266 | 3562 | |
dd613945 | 3563 | if (!rc) { |
5c2503a8 | 3564 | referral_walks_count++; |
1bfe73c2 IM |
3565 | goto try_mount_again; |
3566 | } | |
dd613945 | 3567 | goto mount_fail_check; |
d036f50f SF |
3568 | #else /* No DFS support, return error on mount */ |
3569 | rc = -EOPNOTSUPP; | |
3570 | #endif | |
1bfe73c2 IM |
3571 | } |
3572 | ||
9d002df4 JL |
3573 | if (rc) |
3574 | goto mount_fail_check; | |
3575 | ||
3576 | /* now, hang the tcon off of the superblock */ | |
3577 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); | |
3578 | if (tlink == NULL) { | |
3579 | rc = -ENOMEM; | |
3580 | goto mount_fail_check; | |
3581 | } | |
3582 | ||
af4281dc | 3583 | tlink->tl_uid = ses->linux_uid; |
9d002df4 JL |
3584 | tlink->tl_tcon = tcon; |
3585 | tlink->tl_time = jiffies; | |
3586 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
3587 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3588 | ||
b647c35f | 3589 | cifs_sb->master_tlink = tlink; |
9d002df4 | 3590 | spin_lock(&cifs_sb->tlink_tree_lock); |
b647c35f | 3591 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
9d002df4 | 3592 | spin_unlock(&cifs_sb->tlink_tree_lock); |
413e661c | 3593 | |
da472fc8 | 3594 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
3595 | TLINK_IDLE_EXPIRE); |
3596 | ||
1bfe73c2 IM |
3597 | mount_fail_check: |
3598 | /* on error free sesinfo and tcon struct if needed */ | |
3599 | if (rc) { | |
1bfe73c2 | 3600 | /* If find_unc succeeded then rc == 0 so we can not end */ |
25985edc | 3601 | /* up accidentally freeing someone elses tcon struct */ |
1bfe73c2 IM |
3602 | if (tcon) |
3603 | cifs_put_tcon(tcon); | |
af4281dc PS |
3604 | else if (ses) |
3605 | cifs_put_smb_ses(ses); | |
1bfe73c2 | 3606 | else |
af4281dc | 3607 | cifs_put_tcp_session(server); |
dd854466 | 3608 | bdi_destroy(&cifs_sb->bdi); |
1bfe73c2 IM |
3609 | } |
3610 | ||
70fe7dc0 | 3611 | out: |
6d5786a3 | 3612 | free_xid(xid); |
1da177e4 LT |
3613 | return rc; |
3614 | } | |
3615 | ||
8d1bca32 JL |
3616 | /* |
3617 | * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon | |
3618 | * pointer may be NULL. | |
3619 | */ | |
1da177e4 | 3620 | int |
2e6e02ab | 3621 | CIFSTCon(const unsigned int xid, struct cifs_ses *ses, |
96daf2b0 | 3622 | const char *tree, struct cifs_tcon *tcon, |
1da177e4 LT |
3623 | const struct nls_table *nls_codepage) |
3624 | { | |
3625 | struct smb_hdr *smb_buffer; | |
3626 | struct smb_hdr *smb_buffer_response; | |
3627 | TCONX_REQ *pSMB; | |
3628 | TCONX_RSP *pSMBr; | |
3629 | unsigned char *bcc_ptr; | |
3630 | int rc = 0; | |
690c522f JL |
3631 | int length; |
3632 | __u16 bytes_left, count; | |
1da177e4 LT |
3633 | |
3634 | if (ses == NULL) | |
3635 | return -EIO; | |
3636 | ||
3637 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 3638 | if (smb_buffer == NULL) |
1da177e4 | 3639 | return -ENOMEM; |
ca43e3be | 3640 | |
1da177e4 LT |
3641 | smb_buffer_response = smb_buffer; |
3642 | ||
3643 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
3644 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 | 3645 | |
88257360 | 3646 | smb_buffer->Mid = get_next_mid(ses->server); |
1da177e4 LT |
3647 | smb_buffer->Uid = ses->Suid; |
3648 | pSMB = (TCONX_REQ *) smb_buffer; | |
3649 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
3650 | ||
3651 | pSMB->AndXCommand = 0xFF; | |
3652 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 3653 | bcc_ptr = &pSMB->Password[0]; |
8d1bca32 | 3654 | if (!tcon || (ses->server->sec_mode & SECMODE_USER)) { |
eeac8047 | 3655 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 3656 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 3657 | bcc_ptr++; /* skip password */ |
7c7b25bc | 3658 | /* already aligned so no need to do it below */ |
eeac8047 | 3659 | } else { |
540b2e37 | 3660 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
3661 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
3662 | specified as required (when that support is added to | |
3663 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 3664 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
3665 | by Samba (not sure whether other servers allow |
3666 | NTLMv2 password here) */ | |
7c7b25bc | 3667 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 3668 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
3f618223 | 3669 | (ses->sectype == LANMAN)) |
d3ba50b1 | 3670 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
96daf2b0 | 3671 | ses->server->sec_mode & |
4e53a3fb JL |
3672 | SECMODE_PW_ENCRYPT ? true : false, |
3673 | bcc_ptr); | |
7c7b25bc SF |
3674 | else |
3675 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 | 3676 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
9ef5992e | 3677 | bcc_ptr, nls_codepage); |
eeac8047 | 3678 | |
540b2e37 | 3679 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 3680 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
3681 | /* must align unicode strings */ |
3682 | *bcc_ptr = 0; /* null byte password */ | |
3683 | bcc_ptr++; | |
3684 | } | |
eeac8047 | 3685 | } |
1da177e4 | 3686 | |
38d77c50 | 3687 | if (ses->server->sign) |
1da177e4 LT |
3688 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
3689 | ||
3690 | if (ses->capabilities & CAP_STATUS32) { | |
3691 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
3692 | } | |
3693 | if (ses->capabilities & CAP_DFS) { | |
3694 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
3695 | } | |
3696 | if (ses->capabilities & CAP_UNICODE) { | |
3697 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
3698 | length = | |
acbbb76a | 3699 | cifs_strtoUTF16((__le16 *) bcc_ptr, tree, |
50c2f753 | 3700 | 6 /* max utf8 char length in bytes */ * |
a878fb22 SF |
3701 | (/* server len*/ + 256 /* share len */), nls_codepage); |
3702 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
3703 | bcc_ptr += 2; /* skip trailing null */ |
3704 | } else { /* ASCII */ | |
1da177e4 LT |
3705 | strcpy(bcc_ptr, tree); |
3706 | bcc_ptr += strlen(tree) + 1; | |
3707 | } | |
3708 | strcpy(bcc_ptr, "?????"); | |
3709 | bcc_ptr += strlen("?????"); | |
3710 | bcc_ptr += 1; | |
3711 | count = bcc_ptr - &pSMB->Password[0]; | |
be8e3b00 SF |
3712 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
3713 | pSMB->hdr.smb_buf_length) + count); | |
1da177e4 LT |
3714 | pSMB->ByteCount = cpu_to_le16(count); |
3715 | ||
133672ef | 3716 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 3717 | 0); |
1da177e4 | 3718 | |
1da177e4 LT |
3719 | /* above now done in SendReceive */ |
3720 | if ((rc == 0) && (tcon != NULL)) { | |
0e0d2cf3 SF |
3721 | bool is_unicode; |
3722 | ||
1da177e4 | 3723 | tcon->tidStatus = CifsGood; |
3b795210 | 3724 | tcon->need_reconnect = false; |
1da177e4 LT |
3725 | tcon->tid = smb_buffer_response->Tid; |
3726 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 3727 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 3728 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
3729 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
3730 | is_unicode = true; | |
3731 | else | |
3732 | is_unicode = false; | |
3733 | ||
cc20c031 | 3734 | |
50c2f753 | 3735 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
3736 | if (length == 3) { |
3737 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
3738 | (bcc_ptr[2] == 'C')) { | |
f96637be | 3739 | cifs_dbg(FYI, "IPC connection\n"); |
7f8ed420 SF |
3740 | tcon->ipc = 1; |
3741 | } | |
3742 | } else if (length == 2) { | |
3743 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
3744 | /* the most common case */ | |
f96637be | 3745 | cifs_dbg(FYI, "disk share connection\n"); |
7f8ed420 SF |
3746 | } |
3747 | } | |
50c2f753 | 3748 | bcc_ptr += length + 1; |
cc20c031 | 3749 | bytes_left -= (length + 1); |
46b51d08 | 3750 | strlcpy(tcon->treeName, tree, sizeof(tcon->treeName)); |
cc20c031 JL |
3751 | |
3752 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 3753 | kfree(tcon->nativeFileSystem); |
acbbb76a | 3754 | tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr, |
0e0d2cf3 | 3755 | bytes_left, is_unicode, |
cc20c031 JL |
3756 | nls_codepage); |
3757 | ||
f96637be | 3758 | cifs_dbg(FYI, "nativeFileSystem=%s\n", tcon->nativeFileSystem); |
cc20c031 | 3759 | |
fb8c4b14 | 3760 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
3761 | (smb_buffer_response->WordCount == 7)) |
3762 | /* field is in same location */ | |
3979877e SF |
3763 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
3764 | else | |
3765 | tcon->Flags = 0; | |
f96637be | 3766 | cifs_dbg(FYI, "Tcon flags: 0x%x\n", tcon->Flags); |
1da177e4 | 3767 | } else if ((rc == 0) && tcon == NULL) { |
50c2f753 | 3768 | /* all we need to save for IPC$ connection */ |
1da177e4 LT |
3769 | ses->ipc_tid = smb_buffer_response->Tid; |
3770 | } | |
3771 | ||
a8a11d39 | 3772 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
3773 | return rc; |
3774 | } | |
3775 | ||
2e32cf5e AV |
3776 | static void delayed_free(struct rcu_head *p) |
3777 | { | |
3778 | struct cifs_sb_info *sbi = container_of(p, struct cifs_sb_info, rcu); | |
3779 | unload_nls(sbi->local_nls); | |
3780 | kfree(sbi); | |
3781 | } | |
3782 | ||
2a9b9951 AV |
3783 | void |
3784 | cifs_umount(struct cifs_sb_info *cifs_sb) | |
1da177e4 | 3785 | { |
b647c35f JL |
3786 | struct rb_root *root = &cifs_sb->tlink_tree; |
3787 | struct rb_node *node; | |
3788 | struct tcon_link *tlink; | |
9d002df4 | 3789 | |
2de970ff JL |
3790 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
3791 | ||
b647c35f JL |
3792 | spin_lock(&cifs_sb->tlink_tree_lock); |
3793 | while ((node = rb_first(root))) { | |
3794 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3795 | cifs_get_tlink(tlink); | |
3796 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3797 | rb_erase(node, root); | |
1da177e4 | 3798 | |
b647c35f JL |
3799 | spin_unlock(&cifs_sb->tlink_tree_lock); |
3800 | cifs_put_tlink(tlink); | |
3801 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3802 | } | |
3803 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 3804 | |
dd854466 | 3805 | bdi_destroy(&cifs_sb->bdi); |
d757d71b | 3806 | kfree(cifs_sb->mountdata); |
2e32cf5e | 3807 | call_rcu(&cifs_sb->rcu, delayed_free); |
50c2f753 | 3808 | } |
1da177e4 | 3809 | |
286170aa PS |
3810 | int |
3811 | cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses) | |
1da177e4 LT |
3812 | { |
3813 | int rc = 0; | |
198b5682 | 3814 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 3815 | |
286170aa PS |
3816 | if (!server->ops->need_neg || !server->ops->negotiate) |
3817 | return -ENOSYS; | |
3818 | ||
198b5682 | 3819 | /* only send once per connect */ |
286170aa | 3820 | if (!server->ops->need_neg(server)) |
198b5682 JL |
3821 | return 0; |
3822 | ||
45275789 | 3823 | set_credits(server, 1); |
286170aa PS |
3824 | |
3825 | rc = server->ops->negotiate(xid, ses); | |
198b5682 JL |
3826 | if (rc == 0) { |
3827 | spin_lock(&GlobalMid_Lock); | |
7fdbaa1b | 3828 | if (server->tcpStatus == CifsNeedNegotiate) |
198b5682 JL |
3829 | server->tcpStatus = CifsGood; |
3830 | else | |
3831 | rc = -EHOSTDOWN; | |
3832 | spin_unlock(&GlobalMid_Lock); | |
198b5682 JL |
3833 | } |
3834 | ||
3835 | return rc; | |
3836 | } | |
3837 | ||
58c45c58 PS |
3838 | int |
3839 | cifs_setup_session(const unsigned int xid, struct cifs_ses *ses, | |
3840 | struct nls_table *nls_info) | |
198b5682 | 3841 | { |
58c45c58 | 3842 | int rc = -ENOSYS; |
198b5682 | 3843 | struct TCP_Server_Info *server = ses->server; |
26b994fa | 3844 | |
198b5682 | 3845 | ses->capabilities = server->capabilities; |
26b994fa | 3846 | if (linuxExtEnabled == 0) |
29e20f9c | 3847 | ses->capabilities &= (~server->vals->cap_unix); |
20418acd | 3848 | |
f96637be | 3849 | cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n", |
96daf2b0 | 3850 | server->sec_mode, server->capabilities, server->timeAdj); |
cb7691b6 | 3851 | |
58c45c58 PS |
3852 | if (server->ops->sess_setup) |
3853 | rc = server->ops->sess_setup(xid, ses, nls_info); | |
3854 | ||
d4e63bd6 | 3855 | if (rc) |
f96637be | 3856 | cifs_dbg(VFS, "Send error in SessSetup = %d\n", rc); |
21e73393 | 3857 | |
1da177e4 LT |
3858 | return rc; |
3859 | } | |
3860 | ||
8a8798a5 JL |
3861 | static int |
3862 | cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses) | |
3863 | { | |
3f618223 JL |
3864 | vol->sectype = ses->sectype; |
3865 | ||
3866 | /* krb5 is special, since we don't need username or pw */ | |
3867 | if (vol->sectype == Kerberos) | |
8a8798a5 | 3868 | return 0; |
8a8798a5 JL |
3869 | |
3870 | return cifs_set_cifscreds(vol, ses); | |
3871 | } | |
3872 | ||
96daf2b0 | 3873 | static struct cifs_tcon * |
6d4a0832 | 3874 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid) |
9d002df4 | 3875 | { |
8a8798a5 | 3876 | int rc; |
96daf2b0 SF |
3877 | struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); |
3878 | struct cifs_ses *ses; | |
3879 | struct cifs_tcon *tcon = NULL; | |
9d002df4 | 3880 | struct smb_vol *vol_info; |
9d002df4 JL |
3881 | |
3882 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
803ab977 DC |
3883 | if (vol_info == NULL) |
3884 | return ERR_PTR(-ENOMEM); | |
9d002df4 | 3885 | |
9d002df4 JL |
3886 | vol_info->local_nls = cifs_sb->local_nls; |
3887 | vol_info->linux_uid = fsuid; | |
3888 | vol_info->cred_uid = fsuid; | |
3889 | vol_info->UNC = master_tcon->treeName; | |
3890 | vol_info->retry = master_tcon->retry; | |
3891 | vol_info->nocase = master_tcon->nocase; | |
3892 | vol_info->local_lease = master_tcon->local_lease; | |
3893 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
28e11bd8 JL |
3894 | vol_info->sectype = master_tcon->ses->sectype; |
3895 | vol_info->sign = master_tcon->ses->sign; | |
9d002df4 | 3896 | |
8a8798a5 JL |
3897 | rc = cifs_set_vol_auth(vol_info, master_tcon->ses); |
3898 | if (rc) { | |
3899 | tcon = ERR_PTR(rc); | |
3900 | goto out; | |
3901 | } | |
9d002df4 JL |
3902 | |
3903 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 3904 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 3905 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 3906 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
3907 | |
3908 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
3909 | if (IS_ERR(ses)) { | |
96daf2b0 | 3910 | tcon = (struct cifs_tcon *)ses; |
9d002df4 JL |
3911 | cifs_put_tcp_session(master_tcon->ses->server); |
3912 | goto out; | |
3913 | } | |
3914 | ||
3915 | tcon = cifs_get_tcon(ses, vol_info); | |
3916 | if (IS_ERR(tcon)) { | |
3917 | cifs_put_smb_ses(ses); | |
3918 | goto out; | |
3919 | } | |
3920 | ||
29e20f9c | 3921 | if (cap_unix(ses)) |
9d002df4 JL |
3922 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); |
3923 | out: | |
8a8798a5 JL |
3924 | kfree(vol_info->username); |
3925 | kfree(vol_info->password); | |
9d002df4 JL |
3926 | kfree(vol_info); |
3927 | ||
3928 | return tcon; | |
3929 | } | |
3930 | ||
96daf2b0 | 3931 | struct cifs_tcon * |
9d002df4 JL |
3932 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) |
3933 | { | |
3934 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
3935 | } | |
3936 | ||
b647c35f JL |
3937 | /* find and return a tlink with given uid */ |
3938 | static struct tcon_link * | |
6d4a0832 | 3939 | tlink_rb_search(struct rb_root *root, kuid_t uid) |
b647c35f JL |
3940 | { |
3941 | struct rb_node *node = root->rb_node; | |
3942 | struct tcon_link *tlink; | |
3943 | ||
3944 | while (node) { | |
3945 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3946 | ||
6d4a0832 | 3947 | if (uid_gt(tlink->tl_uid, uid)) |
b647c35f | 3948 | node = node->rb_left; |
6d4a0832 | 3949 | else if (uid_lt(tlink->tl_uid, uid)) |
b647c35f JL |
3950 | node = node->rb_right; |
3951 | else | |
3952 | return tlink; | |
3953 | } | |
3954 | return NULL; | |
3955 | } | |
3956 | ||
3957 | /* insert a tcon_link into the tree */ | |
3958 | static void | |
3959 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
3960 | { | |
3961 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
3962 | struct tcon_link *tlink; | |
3963 | ||
3964 | while (*new) { | |
3965 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
3966 | parent = *new; | |
3967 | ||
6d4a0832 | 3968 | if (uid_gt(tlink->tl_uid, new_tlink->tl_uid)) |
b647c35f JL |
3969 | new = &((*new)->rb_left); |
3970 | else | |
3971 | new = &((*new)->rb_right); | |
3972 | } | |
3973 | ||
3974 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
3975 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
3976 | } | |
3977 | ||
9d002df4 JL |
3978 | /* |
3979 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
3980 | * current task. | |
3981 | * | |
3982 | * If the superblock doesn't refer to a multiuser mount, then just return | |
3983 | * the master tcon for the mount. | |
3984 | * | |
6ef933a3 | 3985 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
3986 | * exists, then check to see if it's pending construction. If it is then wait |
3987 | * for construction to complete. Once it's no longer pending, check to see if | |
3988 | * it failed and either return an error or retry construction, depending on | |
3989 | * the timeout. | |
3990 | * | |
3991 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
3992 | * try to construct a new one. | |
3993 | */ | |
3994 | struct tcon_link * | |
3995 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
3996 | { | |
3997 | int ret; | |
6d4a0832 | 3998 | kuid_t fsuid = current_fsuid(); |
9d002df4 JL |
3999 | struct tcon_link *tlink, *newtlink; |
4000 | ||
4001 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
4002 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
4003 | ||
4004 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 4005 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4006 | if (tlink) |
4007 | cifs_get_tlink(tlink); | |
4008 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4009 | ||
4010 | if (tlink == NULL) { | |
4011 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
4012 | if (newtlink == NULL) | |
4013 | return ERR_PTR(-ENOMEM); | |
b647c35f | 4014 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
4015 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
4016 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
4017 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
4018 | cifs_get_tlink(newtlink); | |
4019 | ||
9d002df4 JL |
4020 | spin_lock(&cifs_sb->tlink_tree_lock); |
4021 | /* was one inserted after previous search? */ | |
b647c35f | 4022 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4023 | if (tlink) { |
4024 | cifs_get_tlink(tlink); | |
4025 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4026 | kfree(newtlink); |
4027 | goto wait_for_construction; | |
4028 | } | |
9d002df4 | 4029 | tlink = newtlink; |
b647c35f JL |
4030 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
4031 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4032 | } else { |
4033 | wait_for_construction: | |
4034 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
9d002df4 JL |
4035 | TASK_INTERRUPTIBLE); |
4036 | if (ret) { | |
4037 | cifs_put_tlink(tlink); | |
74316201 | 4038 | return ERR_PTR(-ERESTARTSYS); |
9d002df4 JL |
4039 | } |
4040 | ||
4041 | /* if it's good, return it */ | |
4042 | if (!IS_ERR(tlink->tl_tcon)) | |
4043 | return tlink; | |
4044 | ||
4045 | /* return error if we tried this already recently */ | |
4046 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
4047 | cifs_put_tlink(tlink); | |
4048 | return ERR_PTR(-EACCES); | |
4049 | } | |
4050 | ||
4051 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
4052 | goto wait_for_construction; | |
4053 | } | |
4054 | ||
4055 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
4056 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
4057 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
4058 | ||
4059 | if (IS_ERR(tlink->tl_tcon)) { | |
4060 | cifs_put_tlink(tlink); | |
4061 | return ERR_PTR(-EACCES); | |
4062 | } | |
4063 | ||
4064 | return tlink; | |
4065 | } | |
2de970ff JL |
4066 | |
4067 | /* | |
4068 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
4069 | * out tcons. | |
4070 | */ | |
4071 | static void | |
4072 | cifs_prune_tlinks(struct work_struct *work) | |
4073 | { | |
4074 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
4075 | prune_tlinks.work); | |
b647c35f JL |
4076 | struct rb_root *root = &cifs_sb->tlink_tree; |
4077 | struct rb_node *node = rb_first(root); | |
4078 | struct rb_node *tmp; | |
4079 | struct tcon_link *tlink; | |
2de970ff | 4080 | |
b647c35f JL |
4081 | /* |
4082 | * Because we drop the spinlock in the loop in order to put the tlink | |
4083 | * it's not guarded against removal of links from the tree. The only | |
4084 | * places that remove entries from the tree are this function and | |
4085 | * umounts. Because this function is non-reentrant and is canceled | |
4086 | * before umount can proceed, this is safe. | |
4087 | */ | |
4088 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4089 | node = rb_first(root); | |
4090 | while (node != NULL) { | |
4091 | tmp = node; | |
4092 | node = rb_next(tmp); | |
4093 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
4094 | ||
4095 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
4096 | atomic_read(&tlink->tl_count) != 0 || | |
4097 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
4098 | continue; | |
2de970ff | 4099 | |
b647c35f JL |
4100 | cifs_get_tlink(tlink); |
4101 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4102 | rb_erase(tmp, root); | |
4103 | ||
4104 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4105 | cifs_put_tlink(tlink); | |
4106 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4107 | } | |
4108 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff | 4109 | |
da472fc8 | 4110 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
4111 | TLINK_IDLE_EXPIRE); |
4112 | } |