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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, |
d8162558 | 88 | Opt_multiuser, Opt_sloppy, |
8830d7e0 SP |
89 | |
90 | /* Mount options which take numeric value */ | |
91 | Opt_backupuid, Opt_backupgid, Opt_uid, | |
92 | Opt_cruid, Opt_gid, Opt_file_mode, | |
93 | Opt_dirmode, Opt_port, | |
94 | Opt_rsize, Opt_wsize, Opt_actimeo, | |
95 | ||
96 | /* Mount options which take string value */ | |
97 | Opt_user, Opt_pass, Opt_ip, | |
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" }, |
8830d7e0 SP |
168 | |
169 | { Opt_backupuid, "backupuid=%s" }, | |
170 | { Opt_backupgid, "backupgid=%s" }, | |
171 | { Opt_uid, "uid=%s" }, | |
172 | { Opt_cruid, "cruid=%s" }, | |
173 | { Opt_gid, "gid=%s" }, | |
174 | { Opt_file_mode, "file_mode=%s" }, | |
175 | { Opt_dirmode, "dirmode=%s" }, | |
176 | { Opt_dirmode, "dir_mode=%s" }, | |
177 | { Opt_port, "port=%s" }, | |
178 | { Opt_rsize, "rsize=%s" }, | |
179 | { Opt_wsize, "wsize=%s" }, | |
180 | { Opt_actimeo, "actimeo=%s" }, | |
181 | ||
4fe9e963 SP |
182 | { Opt_blank_user, "user=" }, |
183 | { Opt_blank_user, "username=" }, | |
8830d7e0 SP |
184 | { Opt_user, "user=%s" }, |
185 | { Opt_user, "username=%s" }, | |
186 | { Opt_blank_pass, "pass=" }, | |
3c15b4cf | 187 | { Opt_blank_pass, "password=" }, |
8830d7e0 SP |
188 | { Opt_pass, "pass=%s" }, |
189 | { Opt_pass, "password=%s" }, | |
4fe9e963 SP |
190 | { Opt_blank_ip, "ip=" }, |
191 | { Opt_blank_ip, "addr=" }, | |
8830d7e0 SP |
192 | { Opt_ip, "ip=%s" }, |
193 | { Opt_ip, "addr=%s" }, | |
73a999fa JL |
194 | { Opt_ignore, "unc=%s" }, |
195 | { Opt_ignore, "target=%s" }, | |
196 | { Opt_ignore, "path=%s" }, | |
8830d7e0 SP |
197 | { Opt_domain, "dom=%s" }, |
198 | { Opt_domain, "domain=%s" }, | |
199 | { Opt_domain, "workgroup=%s" }, | |
200 | { Opt_srcaddr, "srcaddr=%s" }, | |
73a999fa | 201 | { Opt_ignore, "prefixpath=%s" }, |
8830d7e0 | 202 | { Opt_iocharset, "iocharset=%s" }, |
8830d7e0 SP |
203 | { Opt_netbiosname, "netbiosname=%s" }, |
204 | { Opt_servern, "servern=%s" }, | |
205 | { Opt_ver, "ver=%s" }, | |
23db65f5 | 206 | { Opt_vers, "vers=%s" }, |
8830d7e0 | 207 | { Opt_sec, "sec=%s" }, |
15b6a473 | 208 | { Opt_cache, "cache=%s" }, |
8830d7e0 SP |
209 | |
210 | { Opt_ignore, "cred" }, | |
211 | { Opt_ignore, "credentials" }, | |
a557b976 JL |
212 | { Opt_ignore, "cred=%s" }, |
213 | { Opt_ignore, "credentials=%s" }, | |
8830d7e0 SP |
214 | { Opt_ignore, "guest" }, |
215 | { Opt_ignore, "rw" }, | |
216 | { Opt_ignore, "ro" }, | |
217 | { Opt_ignore, "suid" }, | |
218 | { Opt_ignore, "nosuid" }, | |
219 | { Opt_ignore, "exec" }, | |
220 | { Opt_ignore, "noexec" }, | |
221 | { Opt_ignore, "nodev" }, | |
222 | { Opt_ignore, "noauto" }, | |
223 | { Opt_ignore, "dev" }, | |
224 | { Opt_ignore, "mand" }, | |
225 | { Opt_ignore, "nomand" }, | |
226 | { Opt_ignore, "_netdev" }, | |
227 | ||
228 | { Opt_err, NULL } | |
229 | }; | |
230 | ||
231 | enum { | |
232 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
233 | Opt_sec_ntlmsspi, Opt_sec_ntlmssp, | |
7659624f JL |
234 | Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2, |
235 | Opt_sec_ntlmv2i, Opt_sec_lanman, | |
8830d7e0 SP |
236 | Opt_sec_none, |
237 | ||
238 | Opt_sec_err | |
239 | }; | |
240 | ||
241 | static const match_table_t cifs_secflavor_tokens = { | |
242 | { Opt_sec_krb5, "krb5" }, | |
243 | { Opt_sec_krb5i, "krb5i" }, | |
244 | { Opt_sec_krb5p, "krb5p" }, | |
245 | { Opt_sec_ntlmsspi, "ntlmsspi" }, | |
246 | { Opt_sec_ntlmssp, "ntlmssp" }, | |
247 | { Opt_ntlm, "ntlm" }, | |
248 | { Opt_sec_ntlmi, "ntlmi" }, | |
7659624f JL |
249 | { Opt_sec_ntlmv2, "nontlm" }, |
250 | { Opt_sec_ntlmv2, "ntlmv2" }, | |
8830d7e0 | 251 | { Opt_sec_ntlmv2i, "ntlmv2i" }, |
8830d7e0 SP |
252 | { Opt_sec_lanman, "lanman" }, |
253 | { Opt_sec_none, "none" }, | |
254 | ||
255 | { Opt_sec_err, NULL } | |
256 | }; | |
257 | ||
15b6a473 JL |
258 | /* cache flavors */ |
259 | enum { | |
260 | Opt_cache_loose, | |
261 | Opt_cache_strict, | |
262 | Opt_cache_none, | |
263 | Opt_cache_err | |
264 | }; | |
265 | ||
266 | static const match_table_t cifs_cacheflavor_tokens = { | |
267 | { Opt_cache_loose, "loose" }, | |
268 | { Opt_cache_strict, "strict" }, | |
269 | { Opt_cache_none, "none" }, | |
270 | { Opt_cache_err, NULL } | |
271 | }; | |
272 | ||
23db65f5 JL |
273 | static const match_table_t cifs_smb_version_tokens = { |
274 | { Smb_1, SMB1_VERSION_STRING }, | |
dd446b16 | 275 | { Smb_20, SMB20_VERSION_STRING}, |
1080ef75 | 276 | { Smb_21, SMB21_VERSION_STRING }, |
e4aa25e7 | 277 | { Smb_30, SMB30_VERSION_STRING }, |
23db65f5 JL |
278 | }; |
279 | ||
a9f1b85e PS |
280 | static int ip_connect(struct TCP_Server_Info *server); |
281 | static int generic_ip_connect(struct TCP_Server_Info *server); | |
b647c35f | 282 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
2de970ff | 283 | static void cifs_prune_tlinks(struct work_struct *work); |
b9bce2e9 JL |
284 | static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
285 | const char *devname); | |
1da177e4 | 286 | |
d5c5605c JL |
287 | /* |
288 | * cifs tcp session reconnection | |
289 | * | |
290 | * mark tcp session as reconnecting so temporarily locked | |
291 | * mark all smb sessions as reconnecting for tcp session | |
292 | * reconnect tcp session | |
293 | * wake up waiters on reconnection? - (not needed currently) | |
294 | */ | |
28ea5290 | 295 | int |
1da177e4 LT |
296 | cifs_reconnect(struct TCP_Server_Info *server) |
297 | { | |
298 | int rc = 0; | |
f1987b44 | 299 | struct list_head *tmp, *tmp2; |
96daf2b0 SF |
300 | struct cifs_ses *ses; |
301 | struct cifs_tcon *tcon; | |
fb8c4b14 | 302 | struct mid_q_entry *mid_entry; |
3c1105df | 303 | struct list_head retry_list; |
50c2f753 | 304 | |
1da177e4 | 305 | spin_lock(&GlobalMid_Lock); |
469ee614 | 306 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 307 | /* the demux thread will exit normally |
1da177e4 LT |
308 | next time through the loop */ |
309 | spin_unlock(&GlobalMid_Lock); | |
310 | return rc; | |
311 | } else | |
312 | server->tcpStatus = CifsNeedReconnect; | |
313 | spin_unlock(&GlobalMid_Lock); | |
314 | server->maxBuf = 0; | |
aa24d1e9 PS |
315 | #ifdef CONFIG_CIFS_SMB2 |
316 | server->max_read = 0; | |
317 | #endif | |
1da177e4 | 318 | |
f96637be | 319 | cifs_dbg(FYI, "Reconnecting tcp session\n"); |
1da177e4 LT |
320 | |
321 | /* before reconnecting the tcp session, mark the smb session (uid) | |
322 | and the tid bad so they are not used until reconnected */ | |
f96637be JP |
323 | cifs_dbg(FYI, "%s: marking sessions and tcons for reconnect\n", |
324 | __func__); | |
3f9bcca7 | 325 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 326 | list_for_each(tmp, &server->smb_ses_list) { |
96daf2b0 | 327 | ses = list_entry(tmp, struct cifs_ses, smb_ses_list); |
14fbf50d JL |
328 | ses->need_reconnect = true; |
329 | ses->ipc_tid = 0; | |
f1987b44 | 330 | list_for_each(tmp2, &ses->tcon_list) { |
96daf2b0 | 331 | tcon = list_entry(tmp2, struct cifs_tcon, tcon_list); |
3b795210 | 332 | tcon->need_reconnect = true; |
1da177e4 | 333 | } |
1da177e4 | 334 | } |
3f9bcca7 | 335 | spin_unlock(&cifs_tcp_ses_lock); |
2b84a36c | 336 | |
1da177e4 | 337 | /* do not want to be sending data on a socket we are freeing */ |
f96637be | 338 | cifs_dbg(FYI, "%s: tearing down socket\n", __func__); |
72ca545b | 339 | mutex_lock(&server->srv_mutex); |
fb8c4b14 | 340 | if (server->ssocket) { |
f96637be JP |
341 | cifs_dbg(FYI, "State: 0x%x Flags: 0x%lx\n", |
342 | server->ssocket->state, server->ssocket->flags); | |
91cf45f0 | 343 | kernel_sock_shutdown(server->ssocket, SHUT_WR); |
f96637be JP |
344 | cifs_dbg(FYI, "Post shutdown state: 0x%x Flags: 0x%lx\n", |
345 | server->ssocket->state, server->ssocket->flags); | |
1da177e4 LT |
346 | sock_release(server->ssocket); |
347 | server->ssocket = NULL; | |
348 | } | |
5d0d2882 SP |
349 | server->sequence_number = 0; |
350 | server->session_estab = false; | |
21e73393 SP |
351 | kfree(server->session_key.response); |
352 | server->session_key.response = NULL; | |
353 | server->session_key.len = 0; | |
fda35943 | 354 | server->lstrp = jiffies; |
2b84a36c | 355 | mutex_unlock(&server->srv_mutex); |
1da177e4 | 356 | |
2b84a36c | 357 | /* mark submitted MIDs for retry and issue callback */ |
3c1105df | 358 | INIT_LIST_HEAD(&retry_list); |
f96637be | 359 | cifs_dbg(FYI, "%s: moving mids to private list\n", __func__); |
1da177e4 | 360 | spin_lock(&GlobalMid_Lock); |
2b84a36c JL |
361 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
362 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 PS |
363 | if (mid_entry->mid_state == MID_REQUEST_SUBMITTED) |
364 | mid_entry->mid_state = MID_RETRY_NEEDED; | |
3c1105df JL |
365 | list_move(&mid_entry->qhead, &retry_list); |
366 | } | |
367 | spin_unlock(&GlobalMid_Lock); | |
368 | ||
f96637be | 369 | cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__); |
3c1105df JL |
370 | list_for_each_safe(tmp, tmp2, &retry_list) { |
371 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
2b84a36c JL |
372 | list_del_init(&mid_entry->qhead); |
373 | mid_entry->callback(mid_entry); | |
1da177e4 | 374 | } |
1da177e4 | 375 | |
7fdbaa1b | 376 | do { |
6c3d8909 | 377 | try_to_freeze(); |
a9f1b85e PS |
378 | |
379 | /* we should try only the port we connected to before */ | |
380 | rc = generic_ip_connect(server); | |
fb8c4b14 | 381 | if (rc) { |
f96637be | 382 | cifs_dbg(FYI, "reconnect error %d\n", rc); |
0cb766ae | 383 | msleep(3000); |
1da177e4 LT |
384 | } else { |
385 | atomic_inc(&tcpSesReconnectCount); | |
386 | spin_lock(&GlobalMid_Lock); | |
469ee614 | 387 | if (server->tcpStatus != CifsExiting) |
fd88ce93 | 388 | server->tcpStatus = CifsNeedNegotiate; |
fb8c4b14 | 389 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 390 | } |
7fdbaa1b | 391 | } while (server->tcpStatus == CifsNeedReconnect); |
2b84a36c | 392 | |
1da177e4 LT |
393 | return rc; |
394 | } | |
395 | ||
c74093b6 JL |
396 | static void |
397 | cifs_echo_request(struct work_struct *work) | |
398 | { | |
399 | int rc; | |
400 | struct TCP_Server_Info *server = container_of(work, | |
401 | struct TCP_Server_Info, echo.work); | |
402 | ||
247ec9b4 | 403 | /* |
f6d76178 PS |
404 | * We cannot send an echo if it is disabled or until the |
405 | * NEGOTIATE_PROTOCOL request is done, which is indicated by | |
406 | * server->ops->need_neg() == true. Also, no need to ping if | |
407 | * we got a response recently. | |
247ec9b4 | 408 | */ |
286170aa | 409 | if (!server->ops->need_neg || server->ops->need_neg(server) || |
f6d76178 | 410 | (server->ops->can_echo && !server->ops->can_echo(server)) || |
247ec9b4 | 411 | time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ)) |
c74093b6 JL |
412 | goto requeue_echo; |
413 | ||
f6d76178 | 414 | rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS; |
c74093b6 | 415 | if (rc) |
f96637be JP |
416 | cifs_dbg(FYI, "Unable to send echo request to server: %s\n", |
417 | server->hostname); | |
c74093b6 JL |
418 | |
419 | requeue_echo: | |
da472fc8 | 420 | queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL); |
c74093b6 JL |
421 | } |
422 | ||
3d9c2472 | 423 | static bool |
2a37ef94 | 424 | allocate_buffers(struct TCP_Server_Info *server) |
3d9c2472 | 425 | { |
2a37ef94 JL |
426 | if (!server->bigbuf) { |
427 | server->bigbuf = (char *)cifs_buf_get(); | |
428 | if (!server->bigbuf) { | |
f96637be | 429 | cifs_dbg(VFS, "No memory for large SMB response\n"); |
3d9c2472 PS |
430 | msleep(3000); |
431 | /* retry will check if exiting */ | |
432 | return false; | |
433 | } | |
2a37ef94 | 434 | } else if (server->large_buf) { |
3d9c2472 | 435 | /* we are reusing a dirty large buf, clear its start */ |
1887f601 | 436 | memset(server->bigbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
437 | } |
438 | ||
2a37ef94 JL |
439 | if (!server->smallbuf) { |
440 | server->smallbuf = (char *)cifs_small_buf_get(); | |
441 | if (!server->smallbuf) { | |
f96637be | 442 | cifs_dbg(VFS, "No memory for SMB response\n"); |
3d9c2472 PS |
443 | msleep(1000); |
444 | /* retry will check if exiting */ | |
445 | return false; | |
446 | } | |
447 | /* beginning of smb buffer is cleared in our buf_get */ | |
448 | } else { | |
449 | /* if existing small buf clear beginning */ | |
1887f601 | 450 | memset(server->smallbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
451 | } |
452 | ||
3d9c2472 PS |
453 | return true; |
454 | } | |
455 | ||
ba749e6d JL |
456 | static bool |
457 | server_unresponsive(struct TCP_Server_Info *server) | |
458 | { | |
6dae51a5 PS |
459 | /* |
460 | * We need to wait 2 echo intervals to make sure we handle such | |
461 | * situations right: | |
462 | * 1s client sends a normal SMB request | |
463 | * 2s client gets a response | |
464 | * 30s echo workqueue job pops, and decides we got a response recently | |
465 | * and don't need to send another | |
466 | * ... | |
467 | * 65s kernel_recvmsg times out, and we see that we haven't gotten | |
468 | * a response in >60s. | |
469 | */ | |
470 | if (server->tcpStatus == CifsGood && | |
471 | time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) { | |
f96637be JP |
472 | cifs_dbg(VFS, "Server %s has not responded in %d seconds. Reconnecting...\n", |
473 | server->hostname, (2 * SMB_ECHO_INTERVAL) / HZ); | |
ba749e6d JL |
474 | cifs_reconnect(server); |
475 | wake_up(&server->response_q); | |
476 | return true; | |
477 | } | |
478 | ||
479 | return false; | |
480 | } | |
481 | ||
42c4dfc2 JL |
482 | /* |
483 | * kvec_array_init - clone a kvec array, and advance into it | |
484 | * @new: pointer to memory for cloned array | |
485 | * @iov: pointer to original array | |
486 | * @nr_segs: number of members in original array | |
487 | * @bytes: number of bytes to advance into the cloned array | |
488 | * | |
489 | * This function will copy the array provided in iov to a section of memory | |
490 | * and advance the specified number of bytes into the new array. It returns | |
491 | * the number of segments in the new array. "new" must be at least as big as | |
492 | * the original iov array. | |
493 | */ | |
494 | static unsigned int | |
495 | kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs, | |
496 | size_t bytes) | |
497 | { | |
498 | size_t base = 0; | |
499 | ||
500 | while (bytes || !iov->iov_len) { | |
501 | int copy = min(bytes, iov->iov_len); | |
502 | ||
503 | bytes -= copy; | |
504 | base += copy; | |
505 | if (iov->iov_len == base) { | |
506 | iov++; | |
507 | nr_segs--; | |
508 | base = 0; | |
509 | } | |
510 | } | |
511 | memcpy(new, iov, sizeof(*iov) * nr_segs); | |
512 | new->iov_base += base; | |
513 | new->iov_len -= base; | |
514 | return nr_segs; | |
515 | } | |
516 | ||
1041e3f9 JL |
517 | static struct kvec * |
518 | get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs) | |
e7015fb1 | 519 | { |
1041e3f9 JL |
520 | struct kvec *new_iov; |
521 | ||
522 | if (server->iov && nr_segs <= server->nr_iov) | |
523 | return server->iov; | |
524 | ||
525 | /* not big enough -- allocate a new one and release the old */ | |
526 | new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS); | |
527 | if (new_iov) { | |
528 | kfree(server->iov); | |
529 | server->iov = new_iov; | |
530 | server->nr_iov = nr_segs; | |
531 | } | |
532 | return new_iov; | |
533 | } | |
534 | ||
e28bc5b1 JL |
535 | int |
536 | cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig, | |
537 | unsigned int nr_segs, unsigned int to_read) | |
e7015fb1 | 538 | { |
a52c1eb7 JL |
539 | int length = 0; |
540 | int total_read; | |
42c4dfc2 | 541 | unsigned int segs; |
e831e6cf | 542 | struct msghdr smb_msg; |
42c4dfc2 JL |
543 | struct kvec *iov; |
544 | ||
1041e3f9 | 545 | iov = get_server_iovec(server, nr_segs); |
42c4dfc2 JL |
546 | if (!iov) |
547 | return -ENOMEM; | |
e7015fb1 | 548 | |
e831e6cf JL |
549 | smb_msg.msg_control = NULL; |
550 | smb_msg.msg_controllen = 0; | |
551 | ||
a52c1eb7 | 552 | for (total_read = 0; to_read; total_read += length, to_read -= length) { |
95edcff4 JL |
553 | try_to_freeze(); |
554 | ||
ba749e6d | 555 | if (server_unresponsive(server)) { |
a52c1eb7 | 556 | total_read = -EAGAIN; |
ba749e6d JL |
557 | break; |
558 | } | |
559 | ||
42c4dfc2 JL |
560 | segs = kvec_array_init(iov, iov_orig, nr_segs, total_read); |
561 | ||
562 | length = kernel_recvmsg(server->ssocket, &smb_msg, | |
563 | iov, segs, to_read, 0); | |
e7015fb1 | 564 | |
e7015fb1 | 565 | if (server->tcpStatus == CifsExiting) { |
a52c1eb7 | 566 | total_read = -ESHUTDOWN; |
e7015fb1 PS |
567 | break; |
568 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
569 | cifs_reconnect(server); | |
a52c1eb7 | 570 | total_read = -EAGAIN; |
e7015fb1 PS |
571 | break; |
572 | } else if (length == -ERESTARTSYS || | |
573 | length == -EAGAIN || | |
574 | length == -EINTR) { | |
575 | /* | |
576 | * Minimum sleep to prevent looping, allowing socket | |
577 | * to clear and app threads to set tcpStatus | |
578 | * CifsNeedReconnect if server hung. | |
579 | */ | |
580 | usleep_range(1000, 2000); | |
581 | length = 0; | |
a52c1eb7 | 582 | continue; |
e7015fb1 | 583 | } else if (length <= 0) { |
f96637be JP |
584 | cifs_dbg(FYI, "Received no data or error: expecting %d\n" |
585 | "got %d", to_read, length); | |
e7015fb1 | 586 | cifs_reconnect(server); |
a52c1eb7 | 587 | total_read = -EAGAIN; |
e7015fb1 PS |
588 | break; |
589 | } | |
590 | } | |
a52c1eb7 | 591 | return total_read; |
e7015fb1 | 592 | } |
e7015fb1 | 593 | |
e28bc5b1 JL |
594 | int |
595 | cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, | |
596 | unsigned int to_read) | |
42c4dfc2 JL |
597 | { |
598 | struct kvec iov; | |
599 | ||
600 | iov.iov_base = buf; | |
601 | iov.iov_len = to_read; | |
602 | ||
e28bc5b1 | 603 | return cifs_readv_from_socket(server, &iov, 1, to_read); |
e7015fb1 PS |
604 | } |
605 | ||
98bac62c | 606 | static bool |
fe11e4cc | 607 | is_smb_response(struct TCP_Server_Info *server, unsigned char type) |
98bac62c | 608 | { |
98bac62c PS |
609 | /* |
610 | * The first byte big endian of the length field, | |
611 | * is actually not part of the length but the type | |
612 | * with the most common, zero, as regular data. | |
613 | */ | |
fe11e4cc JL |
614 | switch (type) { |
615 | case RFC1002_SESSION_MESSAGE: | |
616 | /* Regular SMB response */ | |
617 | return true; | |
618 | case RFC1002_SESSION_KEEP_ALIVE: | |
f96637be | 619 | cifs_dbg(FYI, "RFC 1002 session keep alive\n"); |
fe11e4cc JL |
620 | break; |
621 | case RFC1002_POSITIVE_SESSION_RESPONSE: | |
f96637be | 622 | cifs_dbg(FYI, "RFC 1002 positive session response\n"); |
fe11e4cc JL |
623 | break; |
624 | case RFC1002_NEGATIVE_SESSION_RESPONSE: | |
98bac62c PS |
625 | /* |
626 | * We get this from Windows 98 instead of an error on | |
627 | * SMB negprot response. | |
628 | */ | |
f96637be | 629 | cifs_dbg(FYI, "RFC 1002 negative session response\n"); |
98bac62c PS |
630 | /* give server a second to clean up */ |
631 | msleep(1000); | |
632 | /* | |
633 | * Always try 445 first on reconnect since we get NACK | |
634 | * on some if we ever connected to port 139 (the NACK | |
635 | * is since we do not begin with RFC1001 session | |
636 | * initialize frame). | |
637 | */ | |
fe11e4cc | 638 | cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT); |
98bac62c PS |
639 | cifs_reconnect(server); |
640 | wake_up(&server->response_q); | |
fe11e4cc JL |
641 | break; |
642 | default: | |
f96637be | 643 | cifs_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type); |
98bac62c | 644 | cifs_reconnect(server); |
98bac62c PS |
645 | } |
646 | ||
fe11e4cc | 647 | return false; |
98bac62c PS |
648 | } |
649 | ||
e28bc5b1 JL |
650 | void |
651 | dequeue_mid(struct mid_q_entry *mid, bool malformed) | |
ea1f4502 | 652 | { |
ad69bae1 | 653 | #ifdef CONFIG_CIFS_STATS2 |
ea1f4502 | 654 | mid->when_received = jiffies; |
ad69bae1 | 655 | #endif |
ea1f4502 JL |
656 | spin_lock(&GlobalMid_Lock); |
657 | if (!malformed) | |
7c9421e1 | 658 | mid->mid_state = MID_RESPONSE_RECEIVED; |
ea1f4502 | 659 | else |
7c9421e1 | 660 | mid->mid_state = MID_RESPONSE_MALFORMED; |
ea1f4502 | 661 | list_del_init(&mid->qhead); |
ad69bae1 | 662 | spin_unlock(&GlobalMid_Lock); |
ea1f4502 | 663 | } |
ad69bae1 | 664 | |
c8054ebd JL |
665 | static void |
666 | handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, | |
d4e4854f | 667 | char *buf, int malformed) |
ea1f4502 | 668 | { |
316cf94a PS |
669 | if (server->ops->check_trans2 && |
670 | server->ops->check_trans2(mid, server, buf, malformed)) | |
c8054ebd | 671 | return; |
ea1f4502 | 672 | mid->resp_buf = buf; |
7c9421e1 | 673 | mid->large_buf = server->large_buf; |
2a37ef94 JL |
674 | /* Was previous buf put in mpx struct for multi-rsp? */ |
675 | if (!mid->multiRsp) { | |
676 | /* smb buffer will be freed by user thread */ | |
677 | if (server->large_buf) | |
678 | server->bigbuf = NULL; | |
679 | else | |
680 | server->smallbuf = NULL; | |
681 | } | |
ffc00e27 | 682 | dequeue_mid(mid, malformed); |
ad69bae1 PS |
683 | } |
684 | ||
762dfd10 PS |
685 | static void clean_demultiplex_info(struct TCP_Server_Info *server) |
686 | { | |
687 | int length; | |
688 | ||
689 | /* take it off the list, if it's not already */ | |
690 | spin_lock(&cifs_tcp_ses_lock); | |
691 | list_del_init(&server->tcp_ses_list); | |
692 | spin_unlock(&cifs_tcp_ses_lock); | |
693 | ||
694 | spin_lock(&GlobalMid_Lock); | |
695 | server->tcpStatus = CifsExiting; | |
696 | spin_unlock(&GlobalMid_Lock); | |
697 | wake_up_all(&server->response_q); | |
698 | ||
2d86dbc9 | 699 | /* check if we have blocked requests that need to free */ |
fc40f9cf | 700 | spin_lock(&server->req_lock); |
2d86dbc9 PS |
701 | if (server->credits <= 0) |
702 | server->credits = 1; | |
fc40f9cf | 703 | spin_unlock(&server->req_lock); |
762dfd10 PS |
704 | /* |
705 | * Although there should not be any requests blocked on this queue it | |
706 | * can not hurt to be paranoid and try to wake up requests that may | |
707 | * haven been blocked when more than 50 at time were on the wire to the | |
708 | * same server - they now will see the session is in exit state and get | |
709 | * out of SendReceive. | |
710 | */ | |
711 | wake_up_all(&server->request_q); | |
712 | /* give those requests time to exit */ | |
713 | msleep(125); | |
714 | ||
715 | if (server->ssocket) { | |
716 | sock_release(server->ssocket); | |
717 | server->ssocket = NULL; | |
718 | } | |
719 | ||
720 | if (!list_empty(&server->pending_mid_q)) { | |
721 | struct list_head dispose_list; | |
722 | struct mid_q_entry *mid_entry; | |
723 | struct list_head *tmp, *tmp2; | |
724 | ||
725 | INIT_LIST_HEAD(&dispose_list); | |
726 | spin_lock(&GlobalMid_Lock); | |
727 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { | |
728 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
f96637be | 729 | cifs_dbg(FYI, "Clearing mid 0x%llx\n", mid_entry->mid); |
7c9421e1 | 730 | mid_entry->mid_state = MID_SHUTDOWN; |
762dfd10 PS |
731 | list_move(&mid_entry->qhead, &dispose_list); |
732 | } | |
733 | spin_unlock(&GlobalMid_Lock); | |
734 | ||
735 | /* now walk dispose list and issue callbacks */ | |
736 | list_for_each_safe(tmp, tmp2, &dispose_list) { | |
737 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
f96637be | 738 | cifs_dbg(FYI, "Callback mid 0x%llx\n", mid_entry->mid); |
762dfd10 PS |
739 | list_del_init(&mid_entry->qhead); |
740 | mid_entry->callback(mid_entry); | |
741 | } | |
742 | /* 1/8th of sec is more than enough time for them to exit */ | |
743 | msleep(125); | |
744 | } | |
745 | ||
746 | if (!list_empty(&server->pending_mid_q)) { | |
747 | /* | |
748 | * mpx threads have not exited yet give them at least the smb | |
749 | * send timeout time for long ops. | |
750 | * | |
751 | * Due to delays on oplock break requests, we need to wait at | |
752 | * least 45 seconds before giving up on a request getting a | |
753 | * response and going ahead and killing cifsd. | |
754 | */ | |
f96637be | 755 | cifs_dbg(FYI, "Wait for exit from demultiplex thread\n"); |
762dfd10 PS |
756 | msleep(46000); |
757 | /* | |
758 | * If threads still have not exited they are probably never | |
759 | * coming home not much else we can do but free the memory. | |
760 | */ | |
761 | } | |
762 | ||
763 | kfree(server->hostname); | |
1041e3f9 | 764 | kfree(server->iov); |
762dfd10 PS |
765 | kfree(server); |
766 | ||
767 | length = atomic_dec_return(&tcpSesAllocCount); | |
768 | if (length > 0) | |
769 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, | |
770 | GFP_KERNEL); | |
771 | } | |
772 | ||
e9097ab4 JL |
773 | static int |
774 | standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
775 | { | |
776 | int length; | |
777 | char *buf = server->smallbuf; | |
d4e4854f | 778 | unsigned int pdu_length = get_rfc1002_length(buf); |
e9097ab4 JL |
779 | |
780 | /* make sure this will fit in a large buffer */ | |
1887f601 | 781 | if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) { |
f96637be | 782 | cifs_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length); |
e9097ab4 JL |
783 | cifs_reconnect(server); |
784 | wake_up(&server->response_q); | |
785 | return -EAGAIN; | |
786 | } | |
787 | ||
788 | /* switch to large buffer if too big for a small one */ | |
789 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { | |
790 | server->large_buf = true; | |
d4e4854f | 791 | memcpy(server->bigbuf, buf, server->total_read); |
e9097ab4 | 792 | buf = server->bigbuf; |
e9097ab4 JL |
793 | } |
794 | ||
795 | /* now read the rest */ | |
1887f601 PS |
796 | length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, |
797 | pdu_length - HEADER_SIZE(server) + 1 + 4); | |
e9097ab4 JL |
798 | if (length < 0) |
799 | return length; | |
800 | server->total_read += length; | |
801 | ||
d4e4854f | 802 | dump_smb(buf, server->total_read); |
e9097ab4 JL |
803 | |
804 | /* | |
805 | * We know that we received enough to get to the MID as we | |
806 | * checked the pdu_length earlier. Now check to see | |
807 | * if the rest of the header is OK. We borrow the length | |
808 | * var for the rest of the loop to avoid a new stack var. | |
809 | * | |
810 | * 48 bytes is enough to display the header and a little bit | |
811 | * into the payload for debugging purposes. | |
812 | */ | |
8aa26f3e | 813 | length = server->ops->check_message(buf, server->total_read); |
e9097ab4 JL |
814 | if (length != 0) |
815 | cifs_dump_mem("Bad SMB: ", buf, | |
816 | min_t(unsigned int, server->total_read, 48)); | |
817 | ||
2e44b288 PS |
818 | if (server->ops->is_status_pending && |
819 | server->ops->is_status_pending(buf, server, length)) | |
820 | return -1; | |
821 | ||
ff4fa4a2 JL |
822 | if (!mid) |
823 | return length; | |
e9097ab4 | 824 | |
d4e4854f | 825 | handle_mid(mid, server, buf, length); |
ff4fa4a2 | 826 | return 0; |
e9097ab4 JL |
827 | } |
828 | ||
1da177e4 | 829 | static int |
7c97c200 | 830 | cifs_demultiplex_thread(void *p) |
1da177e4 LT |
831 | { |
832 | int length; | |
7c97c200 | 833 | struct TCP_Server_Info *server = p; |
2a37ef94 JL |
834 | unsigned int pdu_length; |
835 | char *buf = NULL; | |
1da177e4 LT |
836 | struct task_struct *task_to_wake = NULL; |
837 | struct mid_q_entry *mid_entry; | |
1da177e4 | 838 | |
1da177e4 | 839 | current->flags |= PF_MEMALLOC; |
f96637be | 840 | cifs_dbg(FYI, "Demultiplex PID: %d\n", task_pid_nr(current)); |
93d0ec85 JL |
841 | |
842 | length = atomic_inc_return(&tcpSesAllocCount); | |
843 | if (length > 1) | |
26f57364 SF |
844 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, |
845 | GFP_KERNEL); | |
1da177e4 | 846 | |
83144186 | 847 | set_freezable(); |
469ee614 | 848 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
849 | if (try_to_freeze()) |
850 | continue; | |
b8643e1b | 851 | |
2a37ef94 | 852 | if (!allocate_buffers(server)) |
3d9c2472 | 853 | continue; |
b8643e1b | 854 | |
2a37ef94 | 855 | server->large_buf = false; |
2a37ef94 | 856 | buf = server->smallbuf; |
f01d5e14 | 857 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 858 | |
e28bc5b1 | 859 | length = cifs_read_from_socket(server, buf, pdu_length); |
a52c1eb7 | 860 | if (length < 0) |
1da177e4 | 861 | continue; |
2a37ef94 | 862 | server->total_read = length; |
1da177e4 | 863 | |
98bac62c PS |
864 | /* |
865 | * The right amount was read from socket - 4 bytes, | |
866 | * so we can now interpret the length field. | |
867 | */ | |
d4e4854f | 868 | pdu_length = get_rfc1002_length(buf); |
70ca734a | 869 | |
f96637be | 870 | cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length); |
fe11e4cc | 871 | if (!is_smb_response(server, buf[0])) |
fb8c4b14 | 872 | continue; |
e4eb295d | 873 | |
89482a56 | 874 | /* make sure we have enough to get to the MID */ |
1887f601 | 875 | if (pdu_length < HEADER_SIZE(server) - 1 - 4) { |
f96637be JP |
876 | cifs_dbg(VFS, "SMB response too short (%u bytes)\n", |
877 | pdu_length); | |
89482a56 JL |
878 | cifs_reconnect(server); |
879 | wake_up(&server->response_q); | |
880 | continue; | |
e4eb295d | 881 | } |
e7015fb1 | 882 | |
89482a56 | 883 | /* read down to the MID */ |
e28bc5b1 | 884 | length = cifs_read_from_socket(server, buf + 4, |
1887f601 | 885 | HEADER_SIZE(server) - 1 - 4); |
89482a56 | 886 | if (length < 0) |
e4eb295d | 887 | continue; |
2a37ef94 | 888 | server->total_read += length; |
1da177e4 | 889 | |
8aa26f3e | 890 | mid_entry = server->ops->find_mid(server, buf); |
50c2f753 | 891 | |
44d22d84 JL |
892 | if (!mid_entry || !mid_entry->receive) |
893 | length = standard_receive3(server, mid_entry); | |
894 | else | |
895 | length = mid_entry->receive(server, mid_entry); | |
71823baf | 896 | |
e9097ab4 | 897 | if (length < 0) |
fe11e4cc | 898 | continue; |
1da177e4 | 899 | |
d4e4854f | 900 | if (server->large_buf) |
2a37ef94 | 901 | buf = server->bigbuf; |
fda35943 | 902 | |
fda35943 | 903 | server->lstrp = jiffies; |
2b84a36c | 904 | if (mid_entry != NULL) { |
2a37ef94 JL |
905 | if (!mid_entry->multiRsp || mid_entry->multiEnd) |
906 | mid_entry->callback(mid_entry); | |
7f0adb53 PS |
907 | } else if (!server->ops->is_oplock_break || |
908 | !server->ops->is_oplock_break(buf, server)) { | |
f96637be JP |
909 | cifs_dbg(VFS, "No task to wake, unknown frame received! NumMids %d\n", |
910 | atomic_read(&midCount)); | |
1887f601 PS |
911 | cifs_dump_mem("Received Data is: ", buf, |
912 | HEADER_SIZE(server)); | |
3979877e | 913 | #ifdef CONFIG_CIFS_DEBUG2 |
7f0adb53 PS |
914 | if (server->ops->dump_detail) |
915 | server->ops->dump_detail(buf); | |
3979877e SF |
916 | cifs_dump_mids(server); |
917 | #endif /* CIFS_DEBUG2 */ | |
50c2f753 | 918 | |
e4eb295d SF |
919 | } |
920 | } /* end while !EXITING */ | |
921 | ||
fd62cb7e | 922 | /* buffer usually freed in free_mid - need to free it here on exit */ |
2a37ef94 JL |
923 | cifs_buf_release(server->bigbuf); |
924 | if (server->smallbuf) /* no sense logging a debug message if NULL */ | |
925 | cifs_small_buf_release(server->smallbuf); | |
1da177e4 | 926 | |
b1c8d2b4 | 927 | task_to_wake = xchg(&server->tsk, NULL); |
762dfd10 | 928 | clean_demultiplex_info(server); |
50c2f753 | 929 | |
b1c8d2b4 JL |
930 | /* if server->tsk was NULL then wait for a signal before exiting */ |
931 | if (!task_to_wake) { | |
932 | set_current_state(TASK_INTERRUPTIBLE); | |
933 | while (!signal_pending(current)) { | |
934 | schedule(); | |
935 | set_current_state(TASK_INTERRUPTIBLE); | |
936 | } | |
937 | set_current_state(TASK_RUNNING); | |
938 | } | |
939 | ||
0468a2cf | 940 | module_put_and_exit(0); |
1da177e4 LT |
941 | } |
942 | ||
c359cf3c JL |
943 | /* extract the host portion of the UNC string */ |
944 | static char * | |
945 | extract_hostname(const char *unc) | |
946 | { | |
947 | const char *src; | |
948 | char *dst, *delim; | |
949 | unsigned int len; | |
950 | ||
951 | /* skip double chars at beginning of string */ | |
952 | /* BB: check validity of these bytes? */ | |
953 | src = unc + 2; | |
954 | ||
955 | /* delimiter between hostname and sharename is always '\\' now */ | |
956 | delim = strchr(src, '\\'); | |
957 | if (!delim) | |
958 | return ERR_PTR(-EINVAL); | |
959 | ||
960 | len = delim - src; | |
961 | dst = kmalloc((len + 1), GFP_KERNEL); | |
962 | if (dst == NULL) | |
963 | return ERR_PTR(-ENOMEM); | |
964 | ||
965 | memcpy(dst, src, len); | |
966 | dst[len] = '\0'; | |
967 | ||
968 | return dst; | |
969 | } | |
970 | ||
8830d7e0 SP |
971 | static int get_option_ul(substring_t args[], unsigned long *option) |
972 | { | |
973 | int rc; | |
974 | char *string; | |
975 | ||
976 | string = match_strdup(args); | |
977 | if (string == NULL) | |
978 | return -ENOMEM; | |
bfa890a3 | 979 | rc = kstrtoul(string, 0, option); |
8830d7e0 SP |
980 | kfree(string); |
981 | ||
982 | return rc; | |
983 | } | |
984 | ||
3da46565 EB |
985 | static int get_option_uid(substring_t args[], kuid_t *result) |
986 | { | |
987 | unsigned long value; | |
988 | kuid_t uid; | |
989 | int rc; | |
990 | ||
991 | rc = get_option_ul(args, &value); | |
992 | if (rc) | |
993 | return rc; | |
994 | ||
995 | uid = make_kuid(current_user_ns(), value); | |
996 | if (!uid_valid(uid)) | |
997 | return -EINVAL; | |
998 | ||
999 | *result = uid; | |
1000 | return 0; | |
1001 | } | |
1002 | ||
1003 | static int get_option_gid(substring_t args[], kgid_t *result) | |
1004 | { | |
1005 | unsigned long value; | |
1006 | kgid_t gid; | |
1007 | int rc; | |
1008 | ||
1009 | rc = get_option_ul(args, &value); | |
1010 | if (rc) | |
1011 | return rc; | |
1012 | ||
1013 | gid = make_kgid(current_user_ns(), value); | |
1014 | if (!gid_valid(gid)) | |
1015 | return -EINVAL; | |
1016 | ||
1017 | *result = gid; | |
1018 | return 0; | |
1019 | } | |
8830d7e0 SP |
1020 | |
1021 | static int cifs_parse_security_flavors(char *value, | |
1022 | struct smb_vol *vol) | |
1023 | { | |
1024 | ||
1025 | substring_t args[MAX_OPT_ARGS]; | |
1026 | ||
1027 | switch (match_token(value, cifs_secflavor_tokens, args)) { | |
1028 | case Opt_sec_krb5: | |
0b7bc840 | 1029 | vol->secFlg |= CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_SIGN; |
8830d7e0 SP |
1030 | break; |
1031 | case Opt_sec_krb5i: | |
1032 | vol->secFlg |= CIFSSEC_MAY_KRB5 | CIFSSEC_MUST_SIGN; | |
1033 | break; | |
1034 | case Opt_sec_krb5p: | |
1035 | /* vol->secFlg |= CIFSSEC_MUST_SEAL | CIFSSEC_MAY_KRB5; */ | |
f96637be | 1036 | cifs_dbg(VFS, "Krb5 cifs privacy not supported\n"); |
8830d7e0 SP |
1037 | break; |
1038 | case Opt_sec_ntlmssp: | |
1039 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP; | |
1040 | break; | |
1041 | case Opt_sec_ntlmsspi: | |
1042 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP | CIFSSEC_MUST_SIGN; | |
1043 | break; | |
1044 | case Opt_ntlm: | |
1045 | /* ntlm is default so can be turned off too */ | |
1046 | vol->secFlg |= CIFSSEC_MAY_NTLM; | |
1047 | break; | |
1048 | case Opt_sec_ntlmi: | |
1049 | vol->secFlg |= CIFSSEC_MAY_NTLM | CIFSSEC_MUST_SIGN; | |
1050 | break; | |
7659624f | 1051 | case Opt_sec_ntlmv2: |
8830d7e0 SP |
1052 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
1053 | break; | |
1054 | case Opt_sec_ntlmv2i: | |
1055 | vol->secFlg |= CIFSSEC_MAY_NTLMV2 | CIFSSEC_MUST_SIGN; | |
1056 | break; | |
1057 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
1058 | case Opt_sec_lanman: | |
1059 | vol->secFlg |= CIFSSEC_MAY_LANMAN; | |
1060 | break; | |
1061 | #endif | |
1062 | case Opt_sec_none: | |
1063 | vol->nullauth = 1; | |
539673ff | 1064 | vol->secFlg |= CIFSSEC_MAY_NTLM; |
8830d7e0 SP |
1065 | break; |
1066 | default: | |
f96637be | 1067 | cifs_dbg(VFS, "bad security option: %s\n", value); |
8830d7e0 SP |
1068 | return 1; |
1069 | } | |
1070 | ||
1071 | return 0; | |
1072 | } | |
1073 | ||
15b6a473 JL |
1074 | static int |
1075 | cifs_parse_cache_flavor(char *value, struct smb_vol *vol) | |
1076 | { | |
1077 | substring_t args[MAX_OPT_ARGS]; | |
1078 | ||
1079 | switch (match_token(value, cifs_cacheflavor_tokens, args)) { | |
1080 | case Opt_cache_loose: | |
1081 | vol->direct_io = false; | |
1082 | vol->strict_io = false; | |
1083 | break; | |
1084 | case Opt_cache_strict: | |
1085 | vol->direct_io = false; | |
1086 | vol->strict_io = true; | |
1087 | break; | |
1088 | case Opt_cache_none: | |
1089 | vol->direct_io = true; | |
1090 | vol->strict_io = false; | |
1091 | break; | |
1092 | default: | |
f96637be | 1093 | cifs_dbg(VFS, "bad cache= option: %s\n", value); |
15b6a473 JL |
1094 | return 1; |
1095 | } | |
1096 | return 0; | |
1097 | } | |
1098 | ||
23db65f5 JL |
1099 | static int |
1100 | cifs_parse_smb_version(char *value, struct smb_vol *vol) | |
1101 | { | |
1102 | substring_t args[MAX_OPT_ARGS]; | |
1103 | ||
1104 | switch (match_token(value, cifs_smb_version_tokens, args)) { | |
1105 | case Smb_1: | |
1106 | vol->ops = &smb1_operations; | |
1107 | vol->vals = &smb1_values; | |
1108 | break; | |
1080ef75 | 1109 | #ifdef CONFIG_CIFS_SMB2 |
dd446b16 SF |
1110 | case Smb_20: |
1111 | vol->ops = &smb21_operations; /* currently identical with 2.1 */ | |
1112 | vol->vals = &smb20_values; | |
1113 | break; | |
1080ef75 SF |
1114 | case Smb_21: |
1115 | vol->ops = &smb21_operations; | |
1116 | vol->vals = &smb21_values; | |
1117 | break; | |
e4aa25e7 | 1118 | case Smb_30: |
38107d45 | 1119 | vol->ops = &smb30_operations; |
e4aa25e7 SF |
1120 | vol->vals = &smb30_values; |
1121 | break; | |
1080ef75 | 1122 | #endif |
23db65f5 | 1123 | default: |
f96637be | 1124 | cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value); |
23db65f5 JL |
1125 | return 1; |
1126 | } | |
1127 | return 0; | |
1128 | } | |
1129 | ||
d387a5c5 JL |
1130 | /* |
1131 | * Parse a devname into substrings and populate the vol->UNC and vol->prepath | |
1132 | * fields with the result. Returns 0 on success and an error otherwise. | |
1133 | */ | |
1134 | static int | |
1135 | cifs_parse_devname(const char *devname, struct smb_vol *vol) | |
1136 | { | |
1137 | char *pos; | |
1138 | const char *delims = "/\\"; | |
1139 | size_t len; | |
1140 | ||
1141 | /* make sure we have a valid UNC double delimiter prefix */ | |
1142 | len = strspn(devname, delims); | |
1143 | if (len != 2) | |
1144 | return -EINVAL; | |
1145 | ||
1146 | /* find delimiter between host and sharename */ | |
1147 | pos = strpbrk(devname + 2, delims); | |
1148 | if (!pos) | |
1149 | return -EINVAL; | |
1150 | ||
1151 | /* skip past delimiter */ | |
1152 | ++pos; | |
1153 | ||
1154 | /* now go until next delimiter or end of string */ | |
1155 | len = strcspn(pos, delims); | |
1156 | ||
1157 | /* move "pos" up to delimiter or NULL */ | |
1158 | pos += len; | |
1159 | vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL); | |
1160 | if (!vol->UNC) | |
1161 | return -ENOMEM; | |
1162 | ||
1163 | convert_delimiter(vol->UNC, '\\'); | |
1164 | ||
1165 | /* If pos is NULL, or is a bogus trailing delimiter then no prepath */ | |
1166 | if (!*pos++ || !*pos) | |
1167 | return 0; | |
1168 | ||
1169 | vol->prepath = kstrdup(pos, GFP_KERNEL); | |
1170 | if (!vol->prepath) | |
1171 | return -ENOMEM; | |
1172 | ||
1173 | return 0; | |
1174 | } | |
1175 | ||
1da177e4 | 1176 | static int |
b946845a | 1177 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
50c2f753 | 1178 | struct smb_vol *vol) |
1da177e4 | 1179 | { |
8830d7e0 | 1180 | char *data, *end; |
957df453 | 1181 | char *mountdata_copy = NULL, *options; |
1da177e4 LT |
1182 | unsigned int temp_len, i, j; |
1183 | char separator[2]; | |
9b9d6b24 JL |
1184 | short int override_uid = -1; |
1185 | short int override_gid = -1; | |
1186 | bool uid_specified = false; | |
1187 | bool gid_specified = false; | |
d8162558 JL |
1188 | bool sloppy = false; |
1189 | char *invalid = NULL; | |
88463999 | 1190 | char *nodename = utsname()->nodename; |
8830d7e0 SP |
1191 | char *string = NULL; |
1192 | char *tmp_end, *value; | |
1193 | char delim; | |
b979aaa1 JL |
1194 | bool got_ip = false; |
1195 | unsigned short port = 0; | |
1196 | struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr; | |
1da177e4 LT |
1197 | |
1198 | separator[0] = ','; | |
50c2f753 | 1199 | separator[1] = 0; |
8830d7e0 | 1200 | delim = separator[0]; |
1da177e4 | 1201 | |
6ee9542a JL |
1202 | /* ensure we always start with zeroed-out smb_vol */ |
1203 | memset(vol, 0, sizeof(*vol)); | |
1204 | ||
88463999 JL |
1205 | /* |
1206 | * does not have to be perfect mapping since field is | |
1207 | * informational, only used for servers that do not support | |
1208 | * port 445 and it can be overridden at mount time | |
1209 | */ | |
1397f2ee JL |
1210 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
1211 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
1212 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
1213 | ||
1397f2ee | 1214 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
1215 | /* null target name indicates to use *SMBSERVR default called name |
1216 | if we end up sending RFC1001 session initialize */ | |
1217 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
1218 | vol->cred_uid = current_uid(); |
1219 | vol->linux_uid = current_uid(); | |
a001e5b5 | 1220 | vol->linux_gid = current_gid(); |
f55ed1a8 JL |
1221 | |
1222 | /* default to only allowing write access to owner of the mount */ | |
1223 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
1224 | |
1225 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
1226 | /* default is always to request posix paths. */ |
1227 | vol->posix_paths = 1; | |
a0c9217f JL |
1228 | /* default to using server inode numbers where available */ |
1229 | vol->server_ino = 1; | |
ac67055e | 1230 | |
1b359204 JL |
1231 | /* default is to use strict cifs caching semantics */ |
1232 | vol->strict_io = true; | |
1233 | ||
6d20e840 SJ |
1234 | vol->actimeo = CIFS_DEF_ACTIMEO; |
1235 | ||
23db65f5 JL |
1236 | /* FIXME: add autonegotiation -- for now, SMB1 is default */ |
1237 | vol->ops = &smb1_operations; | |
1238 | vol->vals = &smb1_values; | |
1239 | ||
b946845a SF |
1240 | if (!mountdata) |
1241 | goto cifs_parse_mount_err; | |
1242 | ||
1243 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); | |
1244 | if (!mountdata_copy) | |
1245 | goto cifs_parse_mount_err; | |
1da177e4 | 1246 | |
b946845a | 1247 | options = mountdata_copy; |
4906e50b | 1248 | end = options + strlen(options); |
8830d7e0 | 1249 | |
50c2f753 | 1250 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 1251 | if (options[4] != 0) { |
1da177e4 LT |
1252 | separator[0] = options[4]; |
1253 | options += 5; | |
1254 | } else { | |
f96637be | 1255 | cifs_dbg(FYI, "Null separator not allowed\n"); |
1da177e4 LT |
1256 | } |
1257 | } | |
3d3ea8e6 SP |
1258 | vol->backupuid_specified = false; /* no backup intent for a user */ |
1259 | vol->backupgid_specified = false; /* no backup intent for a group */ | |
50c2f753 | 1260 | |
37d4f99b JL |
1261 | switch (cifs_parse_devname(devname, vol)) { |
1262 | case 0: | |
1263 | break; | |
1264 | case -ENOMEM: | |
1265 | cifs_dbg(VFS, "Unable to allocate memory for devname.\n"); | |
1266 | goto cifs_parse_mount_err; | |
1267 | case -EINVAL: | |
1268 | cifs_dbg(VFS, "Malformed UNC in devname.\n"); | |
1269 | goto cifs_parse_mount_err; | |
1270 | default: | |
1271 | cifs_dbg(VFS, "Unknown error parsing devname.\n"); | |
1272 | goto cifs_parse_mount_err; | |
d387a5c5 JL |
1273 | } |
1274 | ||
1da177e4 | 1275 | while ((data = strsep(&options, separator)) != NULL) { |
8830d7e0 SP |
1276 | substring_t args[MAX_OPT_ARGS]; |
1277 | unsigned long option; | |
1278 | int token; | |
1279 | ||
1da177e4 LT |
1280 | if (!*data) |
1281 | continue; | |
1da177e4 | 1282 | |
8830d7e0 SP |
1283 | token = match_token(data, cifs_mount_option_tokens, args); |
1284 | ||
1285 | switch (token) { | |
1286 | ||
1287 | /* Ingnore the following */ | |
1288 | case Opt_ignore: | |
1289 | break; | |
1290 | ||
1291 | /* Boolean values */ | |
1292 | case Opt_user_xattr: | |
1da177e4 | 1293 | vol->no_xattr = 0; |
8830d7e0 SP |
1294 | break; |
1295 | case Opt_nouser_xattr: | |
1da177e4 | 1296 | vol->no_xattr = 1; |
8830d7e0 SP |
1297 | break; |
1298 | case Opt_forceuid: | |
9b9d6b24 | 1299 | override_uid = 1; |
8830d7e0 SP |
1300 | break; |
1301 | case Opt_noforceuid: | |
9b9d6b24 | 1302 | override_uid = 0; |
8830d7e0 | 1303 | break; |
72bd481f JL |
1304 | case Opt_forcegid: |
1305 | override_gid = 1; | |
1306 | break; | |
1307 | case Opt_noforcegid: | |
1308 | override_gid = 0; | |
1309 | break; | |
8830d7e0 | 1310 | case Opt_noblocksend: |
edf1ae40 | 1311 | vol->noblocksnd = 1; |
8830d7e0 SP |
1312 | break; |
1313 | case Opt_noautotune: | |
edf1ae40 | 1314 | vol->noautotune = 1; |
8830d7e0 SP |
1315 | break; |
1316 | case Opt_hard: | |
1da177e4 | 1317 | vol->retry = 1; |
8830d7e0 SP |
1318 | break; |
1319 | case Opt_soft: | |
1da177e4 | 1320 | vol->retry = 0; |
8830d7e0 SP |
1321 | break; |
1322 | case Opt_perm: | |
1da177e4 | 1323 | vol->noperm = 0; |
8830d7e0 SP |
1324 | break; |
1325 | case Opt_noperm: | |
1da177e4 | 1326 | vol->noperm = 1; |
8830d7e0 SP |
1327 | break; |
1328 | case Opt_mapchars: | |
6a0b4824 | 1329 | vol->remap = 1; |
8830d7e0 SP |
1330 | break; |
1331 | case Opt_nomapchars: | |
6a0b4824 | 1332 | vol->remap = 0; |
8830d7e0 SP |
1333 | break; |
1334 | case Opt_sfu: | |
50c2f753 | 1335 | vol->sfu_emul = 1; |
8830d7e0 SP |
1336 | break; |
1337 | case Opt_nosfu: | |
50c2f753 | 1338 | vol->sfu_emul = 0; |
8830d7e0 SP |
1339 | break; |
1340 | case Opt_nodfs: | |
2c1b8615 | 1341 | vol->nodfs = 1; |
8830d7e0 SP |
1342 | break; |
1343 | case Opt_posixpaths: | |
ac67055e | 1344 | vol->posix_paths = 1; |
8830d7e0 SP |
1345 | break; |
1346 | case Opt_noposixpaths: | |
ac67055e | 1347 | vol->posix_paths = 0; |
8830d7e0 SP |
1348 | break; |
1349 | case Opt_nounix: | |
c18c842b | 1350 | vol->no_linux_ext = 1; |
8830d7e0 SP |
1351 | break; |
1352 | case Opt_nocase: | |
50c2f753 | 1353 | vol->nocase = 1; |
8830d7e0 SP |
1354 | break; |
1355 | case Opt_brl: | |
c46fa8ac | 1356 | vol->nobrl = 0; |
8830d7e0 SP |
1357 | break; |
1358 | case Opt_nobrl: | |
c46fa8ac | 1359 | vol->nobrl = 1; |
5cfdddcf PS |
1360 | /* |
1361 | * turn off mandatory locking in mode | |
8830d7e0 | 1362 | * if remote locking is turned off since the |
5cfdddcf PS |
1363 | * local vfs will do advisory |
1364 | */ | |
50c2f753 SF |
1365 | if (vol->file_mode == |
1366 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1367 | vol->file_mode = S_IALLUGO; |
8830d7e0 SP |
1368 | break; |
1369 | case Opt_forcemandatorylock: | |
13a6e42a | 1370 | vol->mand_lock = 1; |
8830d7e0 SP |
1371 | break; |
1372 | case Opt_setuids: | |
1da177e4 | 1373 | vol->setuids = 1; |
8830d7e0 SP |
1374 | break; |
1375 | case Opt_nosetuids: | |
1da177e4 | 1376 | vol->setuids = 0; |
8830d7e0 SP |
1377 | break; |
1378 | case Opt_dynperm: | |
d0a9c078 | 1379 | vol->dynperm = true; |
8830d7e0 SP |
1380 | break; |
1381 | case Opt_nodynperm: | |
d0a9c078 | 1382 | vol->dynperm = false; |
8830d7e0 SP |
1383 | break; |
1384 | case Opt_nohard: | |
1da177e4 | 1385 | vol->retry = 0; |
8830d7e0 SP |
1386 | break; |
1387 | case Opt_nosoft: | |
1da177e4 | 1388 | vol->retry = 1; |
8830d7e0 SP |
1389 | break; |
1390 | case Opt_nointr: | |
1da177e4 | 1391 | vol->intr = 0; |
8830d7e0 SP |
1392 | break; |
1393 | case Opt_intr: | |
1da177e4 | 1394 | vol->intr = 1; |
8830d7e0 SP |
1395 | break; |
1396 | case Opt_nostrictsync: | |
be652445 | 1397 | vol->nostrictsync = 1; |
8830d7e0 SP |
1398 | break; |
1399 | case Opt_strictsync: | |
be652445 | 1400 | vol->nostrictsync = 0; |
8830d7e0 SP |
1401 | break; |
1402 | case Opt_serverino: | |
1da177e4 | 1403 | vol->server_ino = 1; |
8830d7e0 SP |
1404 | break; |
1405 | case Opt_noserverino: | |
1da177e4 | 1406 | vol->server_ino = 0; |
8830d7e0 SP |
1407 | break; |
1408 | case Opt_rwpidforward: | |
d4ffff1f | 1409 | vol->rwpidforward = 1; |
8830d7e0 SP |
1410 | break; |
1411 | case Opt_cifsacl: | |
0a4b92c0 | 1412 | vol->cifs_acl = 1; |
8830d7e0 SP |
1413 | break; |
1414 | case Opt_nocifsacl: | |
0a4b92c0 | 1415 | vol->cifs_acl = 0; |
8830d7e0 SP |
1416 | break; |
1417 | case Opt_acl: | |
1da177e4 | 1418 | vol->no_psx_acl = 0; |
8830d7e0 SP |
1419 | break; |
1420 | case Opt_noacl: | |
1da177e4 | 1421 | vol->no_psx_acl = 1; |
8830d7e0 SP |
1422 | break; |
1423 | case Opt_locallease: | |
84210e91 | 1424 | vol->local_lease = 1; |
8830d7e0 SP |
1425 | break; |
1426 | case Opt_sign: | |
750d1151 | 1427 | vol->secFlg |= CIFSSEC_MUST_SIGN; |
8830d7e0 SP |
1428 | break; |
1429 | case Opt_seal: | |
95b1cb90 | 1430 | /* we do not do the following in secFlags because seal |
8830d7e0 SP |
1431 | * is a per tree connection (mount) not a per socket |
1432 | * or per-smb connection option in the protocol | |
1433 | * vol->secFlg |= CIFSSEC_MUST_SEAL; | |
1434 | */ | |
95b1cb90 | 1435 | vol->seal = 1; |
8830d7e0 | 1436 | break; |
8830d7e0 | 1437 | case Opt_noac: |
50c2f753 SF |
1438 | printk(KERN_WARNING "CIFS: Mount option noac not " |
1439 | "supported. Instead set " | |
1440 | "/proc/fs/cifs/LookupCacheEnabled to 0\n"); | |
8830d7e0 SP |
1441 | break; |
1442 | case Opt_fsc: | |
607a569d | 1443 | #ifndef CONFIG_CIFS_FSCACHE |
f96637be | 1444 | cifs_dbg(VFS, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n"); |
b946845a | 1445 | goto cifs_parse_mount_err; |
607a569d | 1446 | #endif |
fa1df75d | 1447 | vol->fsc = true; |
8830d7e0 SP |
1448 | break; |
1449 | case Opt_mfsymlinks: | |
736a3320 | 1450 | vol->mfsymlinks = true; |
8830d7e0 SP |
1451 | break; |
1452 | case Opt_multiuser: | |
0eb8a132 | 1453 | vol->multiuser = true; |
8830d7e0 | 1454 | break; |
d8162558 JL |
1455 | case Opt_sloppy: |
1456 | sloppy = true; | |
1457 | break; | |
8830d7e0 SP |
1458 | |
1459 | /* Numeric Values */ | |
1460 | case Opt_backupuid: | |
3da46565 | 1461 | if (get_option_uid(args, &vol->backupuid)) { |
f96637be JP |
1462 | cifs_dbg(VFS, "%s: Invalid backupuid value\n", |
1463 | __func__); | |
3d3ea8e6 SP |
1464 | goto cifs_parse_mount_err; |
1465 | } | |
1466 | vol->backupuid_specified = true; | |
8830d7e0 SP |
1467 | break; |
1468 | case Opt_backupgid: | |
3da46565 | 1469 | if (get_option_gid(args, &vol->backupgid)) { |
f96637be JP |
1470 | cifs_dbg(VFS, "%s: Invalid backupgid value\n", |
1471 | __func__); | |
3d3ea8e6 SP |
1472 | goto cifs_parse_mount_err; |
1473 | } | |
1474 | vol->backupgid_specified = true; | |
8830d7e0 SP |
1475 | break; |
1476 | case Opt_uid: | |
3da46565 | 1477 | if (get_option_uid(args, &vol->linux_uid)) { |
f96637be JP |
1478 | cifs_dbg(VFS, "%s: Invalid uid value\n", |
1479 | __func__); | |
8830d7e0 SP |
1480 | goto cifs_parse_mount_err; |
1481 | } | |
8830d7e0 SP |
1482 | uid_specified = true; |
1483 | break; | |
1484 | case Opt_cruid: | |
3da46565 | 1485 | if (get_option_uid(args, &vol->cred_uid)) { |
f96637be JP |
1486 | cifs_dbg(VFS, "%s: Invalid cruid value\n", |
1487 | __func__); | |
8830d7e0 SP |
1488 | goto cifs_parse_mount_err; |
1489 | } | |
8830d7e0 SP |
1490 | break; |
1491 | case Opt_gid: | |
3da46565 | 1492 | if (get_option_gid(args, &vol->linux_gid)) { |
f96637be JP |
1493 | cifs_dbg(VFS, "%s: Invalid gid value\n", |
1494 | __func__); | |
8830d7e0 SP |
1495 | goto cifs_parse_mount_err; |
1496 | } | |
8830d7e0 SP |
1497 | gid_specified = true; |
1498 | break; | |
1499 | case Opt_file_mode: | |
1500 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1501 | cifs_dbg(VFS, "%s: Invalid file_mode value\n", |
1502 | __func__); | |
8830d7e0 SP |
1503 | goto cifs_parse_mount_err; |
1504 | } | |
1505 | vol->file_mode = option; | |
1506 | break; | |
1507 | case Opt_dirmode: | |
1508 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1509 | cifs_dbg(VFS, "%s: Invalid dir_mode value\n", |
1510 | __func__); | |
8830d7e0 SP |
1511 | goto cifs_parse_mount_err; |
1512 | } | |
1513 | vol->dir_mode = option; | |
1514 | break; | |
1515 | case Opt_port: | |
b979aaa1 JL |
1516 | if (get_option_ul(args, &option) || |
1517 | option > USHRT_MAX) { | |
f96637be JP |
1518 | cifs_dbg(VFS, "%s: Invalid port value\n", |
1519 | __func__); | |
8830d7e0 SP |
1520 | goto cifs_parse_mount_err; |
1521 | } | |
b979aaa1 | 1522 | port = (unsigned short)option; |
8830d7e0 SP |
1523 | break; |
1524 | case Opt_rsize: | |
1525 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1526 | cifs_dbg(VFS, "%s: Invalid rsize value\n", |
1527 | __func__); | |
b946845a | 1528 | goto cifs_parse_mount_err; |
8830d7e0 SP |
1529 | } |
1530 | vol->rsize = option; | |
1531 | break; | |
1532 | case Opt_wsize: | |
1533 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1534 | cifs_dbg(VFS, "%s: Invalid wsize value\n", |
1535 | __func__); | |
8830d7e0 SP |
1536 | goto cifs_parse_mount_err; |
1537 | } | |
1538 | vol->wsize = option; | |
1539 | break; | |
1540 | case Opt_actimeo: | |
1541 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1542 | cifs_dbg(VFS, "%s: Invalid actimeo value\n", |
1543 | __func__); | |
8830d7e0 SP |
1544 | goto cifs_parse_mount_err; |
1545 | } | |
1546 | vol->actimeo = HZ * option; | |
1547 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
f96637be | 1548 | cifs_dbg(VFS, "attribute cache timeout too large\n"); |
8830d7e0 SP |
1549 | goto cifs_parse_mount_err; |
1550 | } | |
1551 | break; | |
1552 | ||
1553 | /* String Arguments */ | |
1554 | ||
4fe9e963 SP |
1555 | case Opt_blank_user: |
1556 | /* null user, ie. anonymous authentication */ | |
1557 | vol->nullauth = 1; | |
1558 | vol->username = NULL; | |
1559 | break; | |
8830d7e0 SP |
1560 | case Opt_user: |
1561 | string = match_strdup(args); | |
1562 | if (string == NULL) | |
1563 | goto out_nomem; | |
1564 | ||
4fe9e963 | 1565 | if (strnlen(string, MAX_USERNAME_SIZE) > |
8830d7e0 SP |
1566 | MAX_USERNAME_SIZE) { |
1567 | printk(KERN_WARNING "CIFS: username too long\n"); | |
1568 | goto cifs_parse_mount_err; | |
1569 | } | |
1570 | vol->username = kstrdup(string, GFP_KERNEL); | |
f96637be | 1571 | if (!vol->username) |
8830d7e0 | 1572 | goto cifs_parse_mount_err; |
8830d7e0 SP |
1573 | break; |
1574 | case Opt_blank_pass: | |
8830d7e0 SP |
1575 | /* passwords have to be handled differently |
1576 | * to allow the character used for deliminator | |
1577 | * to be passed within them | |
1578 | */ | |
1579 | ||
c369c9a4 SP |
1580 | /* |
1581 | * Check if this is a case where the password | |
1582 | * starts with a delimiter | |
1583 | */ | |
1584 | tmp_end = strchr(data, '='); | |
1585 | tmp_end++; | |
1586 | if (!(tmp_end < end && tmp_end[1] == delim)) { | |
1587 | /* No it is not. Set the password to NULL */ | |
1588 | vol->password = NULL; | |
1589 | break; | |
1590 | } | |
1591 | /* Yes it is. Drop down to Opt_pass below.*/ | |
1592 | case Opt_pass: | |
8830d7e0 SP |
1593 | /* Obtain the value string */ |
1594 | value = strchr(data, '='); | |
10238074 | 1595 | value++; |
8830d7e0 SP |
1596 | |
1597 | /* Set tmp_end to end of the string */ | |
1598 | tmp_end = (char *) value + strlen(value); | |
1599 | ||
1600 | /* Check if following character is the deliminator | |
1601 | * If yes, we have encountered a double deliminator | |
1602 | * reset the NULL character to the deliminator | |
1603 | */ | |
e73f843a | 1604 | if (tmp_end < end && tmp_end[1] == delim) { |
8830d7e0 SP |
1605 | tmp_end[0] = delim; |
1606 | ||
e73f843a SJ |
1607 | /* Keep iterating until we get to a single |
1608 | * deliminator OR the end | |
1609 | */ | |
1610 | while ((tmp_end = strchr(tmp_end, delim)) | |
1611 | != NULL && (tmp_end[1] == delim)) { | |
1612 | tmp_end = (char *) &tmp_end[2]; | |
1613 | } | |
1614 | ||
1615 | /* Reset var options to point to next element */ | |
1616 | if (tmp_end) { | |
1617 | tmp_end[0] = '\0'; | |
1618 | options = (char *) &tmp_end[1]; | |
1619 | } else | |
1620 | /* Reached the end of the mount option | |
1621 | * string */ | |
1622 | options = end; | |
8830d7e0 SP |
1623 | } |
1624 | ||
8830d7e0 SP |
1625 | /* Now build new password string */ |
1626 | temp_len = strlen(value); | |
1627 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); | |
1628 | if (vol->password == NULL) { | |
1629 | printk(KERN_WARNING "CIFS: no memory " | |
1630 | "for password\n"); | |
1631 | goto cifs_parse_mount_err; | |
1632 | } | |
1633 | ||
1634 | for (i = 0, j = 0; i < temp_len; i++, j++) { | |
1635 | vol->password[j] = value[i]; | |
1636 | if ((value[i] == delim) && | |
1637 | value[i+1] == delim) | |
1638 | /* skip the second deliminator */ | |
1639 | i++; | |
1640 | } | |
1641 | vol->password[j] = '\0'; | |
1642 | break; | |
4fe9e963 | 1643 | case Opt_blank_ip: |
b979aaa1 JL |
1644 | /* FIXME: should this be an error instead? */ |
1645 | got_ip = false; | |
4fe9e963 | 1646 | break; |
8830d7e0 SP |
1647 | case Opt_ip: |
1648 | string = match_strdup(args); | |
1649 | if (string == NULL) | |
1650 | goto out_nomem; | |
1651 | ||
b979aaa1 JL |
1652 | if (!cifs_convert_address(dstaddr, string, |
1653 | strlen(string))) { | |
1654 | printk(KERN_ERR "CIFS: bad ip= option (%s).\n", | |
1655 | string); | |
8830d7e0 SP |
1656 | goto cifs_parse_mount_err; |
1657 | } | |
b979aaa1 | 1658 | got_ip = true; |
8830d7e0 | 1659 | break; |
8830d7e0 SP |
1660 | case Opt_domain: |
1661 | string = match_strdup(args); | |
1662 | if (string == NULL) | |
1663 | goto out_nomem; | |
1664 | ||
4fe9e963 | 1665 | if (strnlen(string, 256) == 256) { |
8830d7e0 SP |
1666 | printk(KERN_WARNING "CIFS: domain name too" |
1667 | " long\n"); | |
1668 | goto cifs_parse_mount_err; | |
1669 | } | |
1670 | ||
1671 | vol->domainname = kstrdup(string, GFP_KERNEL); | |
1672 | if (!vol->domainname) { | |
1673 | printk(KERN_WARNING "CIFS: no memory " | |
1674 | "for domainname\n"); | |
1675 | goto cifs_parse_mount_err; | |
1676 | } | |
f96637be | 1677 | cifs_dbg(FYI, "Domain name set\n"); |
8830d7e0 SP |
1678 | break; |
1679 | case Opt_srcaddr: | |
1680 | string = match_strdup(args); | |
1681 | if (string == NULL) | |
1682 | goto out_nomem; | |
1683 | ||
4fe9e963 | 1684 | if (!cifs_convert_address( |
8830d7e0 SP |
1685 | (struct sockaddr *)&vol->srcaddr, |
1686 | string, strlen(string))) { | |
1687 | printk(KERN_WARNING "CIFS: Could not parse" | |
1688 | " srcaddr: %s\n", string); | |
1689 | goto cifs_parse_mount_err; | |
1690 | } | |
1691 | break; | |
8830d7e0 SP |
1692 | case Opt_iocharset: |
1693 | string = match_strdup(args); | |
1694 | if (string == NULL) | |
1695 | goto out_nomem; | |
1696 | ||
4fe9e963 | 1697 | if (strnlen(string, 1024) >= 65) { |
8830d7e0 SP |
1698 | printk(KERN_WARNING "CIFS: iocharset name " |
1699 | "too long.\n"); | |
1700 | goto cifs_parse_mount_err; | |
1701 | } | |
1702 | ||
1703 | if (strnicmp(string, "default", 7) != 0) { | |
1704 | vol->iocharset = kstrdup(string, | |
1705 | GFP_KERNEL); | |
1706 | if (!vol->iocharset) { | |
1707 | printk(KERN_WARNING "CIFS: no memory" | |
1708 | "for charset\n"); | |
1709 | goto cifs_parse_mount_err; | |
1710 | } | |
1711 | } | |
1712 | /* if iocharset not set then load_nls_default | |
1713 | * is used by caller | |
1714 | */ | |
f96637be | 1715 | cifs_dbg(FYI, "iocharset set to %s\n", string); |
8830d7e0 | 1716 | break; |
8830d7e0 SP |
1717 | case Opt_netbiosname: |
1718 | string = match_strdup(args); | |
1719 | if (string == NULL) | |
1720 | goto out_nomem; | |
1721 | ||
8830d7e0 SP |
1722 | memset(vol->source_rfc1001_name, 0x20, |
1723 | RFC1001_NAME_LEN); | |
1724 | /* | |
1725 | * FIXME: are there cases in which a comma can | |
1726 | * be valid in workstation netbios name (and | |
1727 | * need special handling)? | |
1728 | */ | |
1729 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
1730 | /* don't ucase netbiosname for user */ | |
1731 | if (string[i] == 0) | |
1732 | break; | |
1733 | vol->source_rfc1001_name[i] = string[i]; | |
1734 | } | |
1735 | /* The string has 16th byte zero still from | |
1736 | * set at top of the function | |
1737 | */ | |
1738 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
1739 | printk(KERN_WARNING "CIFS: netbiosname" | |
1740 | " longer than 15 truncated.\n"); | |
1741 | ||
1742 | break; | |
1743 | case Opt_servern: | |
1744 | /* servernetbiosname specified override *SMBSERVER */ | |
1745 | string = match_strdup(args); | |
1746 | if (string == NULL) | |
1747 | goto out_nomem; | |
1748 | ||
8830d7e0 SP |
1749 | /* last byte, type, is 0x20 for servr type */ |
1750 | memset(vol->target_rfc1001_name, 0x20, | |
1751 | RFC1001_NAME_LEN_WITH_NULL); | |
1752 | ||
1753 | /* BB are there cases in which a comma can be | |
1754 | valid in this workstation netbios name | |
1755 | (and need special handling)? */ | |
1756 | ||
1757 | /* user or mount helper must uppercase the | |
1758 | netbios name */ | |
1759 | for (i = 0; i < 15; i++) { | |
1760 | if (string[i] == 0) | |
1761 | break; | |
1762 | vol->target_rfc1001_name[i] = string[i]; | |
1763 | } | |
1764 | /* The string has 16th byte zero still from | |
1765 | set at top of the function */ | |
1766 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
1767 | printk(KERN_WARNING "CIFS: server net" | |
1768 | "biosname longer than 15 truncated.\n"); | |
1769 | break; | |
1770 | case Opt_ver: | |
1771 | string = match_strdup(args); | |
1772 | if (string == NULL) | |
1773 | goto out_nomem; | |
1774 | ||
5249af32 | 1775 | if (strnicmp(string, "1", 1) == 0) { |
8830d7e0 SP |
1776 | /* This is the default */ |
1777 | break; | |
1778 | } | |
1779 | /* For all other value, error */ | |
1780 | printk(KERN_WARNING "CIFS: Invalid version" | |
1781 | " specified\n"); | |
b946845a | 1782 | goto cifs_parse_mount_err; |
23db65f5 JL |
1783 | case Opt_vers: |
1784 | string = match_strdup(args); | |
1785 | if (string == NULL) | |
1786 | goto out_nomem; | |
1787 | ||
1788 | if (cifs_parse_smb_version(string, vol) != 0) | |
1789 | goto cifs_parse_mount_err; | |
1790 | break; | |
8830d7e0 SP |
1791 | case Opt_sec: |
1792 | string = match_strdup(args); | |
1793 | if (string == NULL) | |
1794 | goto out_nomem; | |
1795 | ||
8830d7e0 SP |
1796 | if (cifs_parse_security_flavors(string, vol) != 0) |
1797 | goto cifs_parse_mount_err; | |
1798 | break; | |
15b6a473 JL |
1799 | case Opt_cache: |
1800 | string = match_strdup(args); | |
1801 | if (string == NULL) | |
1802 | goto out_nomem; | |
1803 | ||
1804 | if (cifs_parse_cache_flavor(string, vol) != 0) | |
1805 | goto cifs_parse_mount_err; | |
1806 | break; | |
8830d7e0 | 1807 | default: |
d8162558 JL |
1808 | /* |
1809 | * An option we don't recognize. Save it off for later | |
1810 | * if we haven't already found one | |
1811 | */ | |
1812 | if (!invalid) | |
1813 | invalid = data; | |
8830d7e0 | 1814 | break; |
1da177e4 | 1815 | } |
8830d7e0 SP |
1816 | /* Free up any allocated string */ |
1817 | kfree(string); | |
1818 | string = NULL; | |
1da177e4 | 1819 | } |
0eb8a132 | 1820 | |
d8162558 JL |
1821 | if (!sloppy && invalid) { |
1822 | printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid); | |
1823 | goto cifs_parse_mount_err; | |
1824 | } | |
1825 | ||
8a8798a5 JL |
1826 | #ifndef CONFIG_KEYS |
1827 | /* Muliuser mounts require CONFIG_KEYS support */ | |
1828 | if (vol->multiuser) { | |
f96637be | 1829 | cifs_dbg(VFS, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n"); |
b946845a | 1830 | goto cifs_parse_mount_err; |
0eb8a132 | 1831 | } |
8a8798a5 | 1832 | #endif |
e5e69abd | 1833 | if (!vol->UNC) { |
37d4f99b | 1834 | cifs_dbg(VFS, "CIFS mount error: No usable UNC path provided in device string!\n"); |
e5e69abd JL |
1835 | goto cifs_parse_mount_err; |
1836 | } | |
0eb8a132 | 1837 | |
62a1a439 JL |
1838 | /* make sure UNC has a share name */ |
1839 | if (!strchr(vol->UNC + 3, '\\')) { | |
f96637be | 1840 | cifs_dbg(VFS, "Malformed UNC. Unable to find share name.\n"); |
62a1a439 JL |
1841 | goto cifs_parse_mount_err; |
1842 | } | |
1843 | ||
b979aaa1 JL |
1844 | if (!got_ip) { |
1845 | /* No ip= option specified? Try to get it from UNC */ | |
1846 | if (!cifs_convert_address(dstaddr, &vol->UNC[2], | |
1847 | strlen(&vol->UNC[2]))) { | |
1848 | printk(KERN_ERR "Unable to determine destination " | |
1849 | "address.\n"); | |
1850 | goto cifs_parse_mount_err; | |
1851 | } | |
1852 | } | |
1853 | ||
1854 | /* set the port that we got earlier */ | |
1855 | cifs_set_port(dstaddr, port); | |
1da177e4 | 1856 | |
9b9d6b24 JL |
1857 | if (uid_specified) |
1858 | vol->override_uid = override_uid; | |
1859 | else if (override_uid == 1) | |
1860 | printk(KERN_NOTICE "CIFS: ignoring forceuid mount option " | |
1861 | "specified with no uid= option.\n"); | |
1862 | ||
1863 | if (gid_specified) | |
1864 | vol->override_gid = override_gid; | |
1865 | else if (override_gid == 1) | |
1866 | printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " | |
1867 | "specified with no gid= option.\n"); | |
1868 | ||
b946845a | 1869 | kfree(mountdata_copy); |
1da177e4 | 1870 | return 0; |
b946845a | 1871 | |
8830d7e0 SP |
1872 | out_nomem: |
1873 | printk(KERN_WARNING "Could not allocate temporary buffer\n"); | |
b946845a | 1874 | cifs_parse_mount_err: |
8830d7e0 | 1875 | kfree(string); |
b946845a SF |
1876 | kfree(mountdata_copy); |
1877 | return 1; | |
1da177e4 LT |
1878 | } |
1879 | ||
3eb9a889 BG |
1880 | /** Returns true if srcaddr isn't specified and rhs isn't |
1881 | * specified, or if srcaddr is specified and | |
1882 | * matches the IP address of the rhs argument. | |
1883 | */ | |
1884 | static bool | |
1885 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
1886 | { | |
1887 | switch (srcaddr->sa_family) { | |
1888 | case AF_UNSPEC: | |
1889 | return (rhs->sa_family == AF_UNSPEC); | |
1890 | case AF_INET: { | |
1891 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
1892 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
1893 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
1894 | } | |
1895 | case AF_INET6: { | |
1896 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
e3e2775c | 1897 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs; |
3eb9a889 BG |
1898 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); |
1899 | } | |
1900 | default: | |
1901 | WARN_ON(1); | |
1902 | return false; /* don't expect to be here */ | |
1903 | } | |
1904 | } | |
1905 | ||
4b886136 PS |
1906 | /* |
1907 | * If no port is specified in addr structure, we try to match with 445 port | |
1908 | * and if it fails - with 139 ports. It should be called only if address | |
1909 | * families of server and addr are equal. | |
1910 | */ | |
1911 | static bool | |
1912 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
1913 | { | |
6da97910 | 1914 | __be16 port, *sport; |
4b886136 PS |
1915 | |
1916 | switch (addr->sa_family) { | |
1917 | case AF_INET: | |
1918 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
1919 | port = ((struct sockaddr_in *) addr)->sin_port; | |
1920 | break; | |
1921 | case AF_INET6: | |
1922 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
1923 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
1924 | break; | |
1925 | default: | |
1926 | WARN_ON(1); | |
1927 | return false; | |
1928 | } | |
1929 | ||
1930 | if (!port) { | |
1931 | port = htons(CIFS_PORT); | |
1932 | if (port == *sport) | |
1933 | return true; | |
1934 | ||
1935 | port = htons(RFC1001_PORT); | |
1936 | } | |
1937 | ||
1938 | return port == *sport; | |
1939 | } | |
3eb9a889 | 1940 | |
4515148e | 1941 | static bool |
3eb9a889 BG |
1942 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
1943 | struct sockaddr *srcaddr) | |
4515148e | 1944 | { |
4515148e | 1945 | switch (addr->sa_family) { |
a9f1b85e PS |
1946 | case AF_INET: { |
1947 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
1948 | struct sockaddr_in *srv_addr4 = | |
1949 | (struct sockaddr_in *)&server->dstaddr; | |
1950 | ||
1951 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 1952 | return false; |
4515148e | 1953 | break; |
a9f1b85e PS |
1954 | } |
1955 | case AF_INET6: { | |
1956 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
1957 | struct sockaddr_in6 *srv_addr6 = | |
1958 | (struct sockaddr_in6 *)&server->dstaddr; | |
1959 | ||
4515148e | 1960 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 1961 | &srv_addr6->sin6_addr)) |
4515148e | 1962 | return false; |
a9f1b85e | 1963 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 1964 | return false; |
4515148e JL |
1965 | break; |
1966 | } | |
a9f1b85e PS |
1967 | default: |
1968 | WARN_ON(1); | |
1969 | return false; /* don't expect to be here */ | |
1970 | } | |
4515148e | 1971 | |
3eb9a889 BG |
1972 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
1973 | return false; | |
1974 | ||
4515148e JL |
1975 | return true; |
1976 | } | |
1977 | ||
daf5b0b6 JL |
1978 | static bool |
1979 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
1980 | { | |
1981 | unsigned int secFlags; | |
1982 | ||
1983 | if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
1984 | secFlags = vol->secFlg; | |
1985 | else | |
1986 | secFlags = global_secflags | vol->secFlg; | |
1987 | ||
1988 | switch (server->secType) { | |
1989 | case LANMAN: | |
1990 | if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT))) | |
1991 | return false; | |
1992 | break; | |
1993 | case NTLMv2: | |
1994 | if (!(secFlags & CIFSSEC_MAY_NTLMV2)) | |
1995 | return false; | |
1996 | break; | |
1997 | case NTLM: | |
1998 | if (!(secFlags & CIFSSEC_MAY_NTLM)) | |
1999 | return false; | |
2000 | break; | |
2001 | case Kerberos: | |
2002 | if (!(secFlags & CIFSSEC_MAY_KRB5)) | |
2003 | return false; | |
2004 | break; | |
2005 | case RawNTLMSSP: | |
2006 | if (!(secFlags & CIFSSEC_MAY_NTLMSSP)) | |
2007 | return false; | |
2008 | break; | |
2009 | default: | |
2010 | /* shouldn't happen */ | |
2011 | return false; | |
2012 | } | |
2013 | ||
25985edc | 2014 | /* now check if signing mode is acceptable */ |
daf5b0b6 | 2015 | if ((secFlags & CIFSSEC_MAY_SIGN) == 0 && |
96daf2b0 | 2016 | (server->sec_mode & SECMODE_SIGN_REQUIRED)) |
daf5b0b6 JL |
2017 | return false; |
2018 | else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) && | |
96daf2b0 | 2019 | (server->sec_mode & |
daf5b0b6 JL |
2020 | (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0) |
2021 | return false; | |
2022 | ||
2023 | return true; | |
2024 | } | |
2025 | ||
9fa114f7 | 2026 | static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol) |
37bb04e5 | 2027 | { |
9fa114f7 JL |
2028 | struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr; |
2029 | ||
23db65f5 JL |
2030 | if ((server->vals != vol->vals) || (server->ops != vol->ops)) |
2031 | return 0; | |
2032 | ||
37bb04e5 PS |
2033 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) |
2034 | return 0; | |
2035 | ||
2036 | if (!match_address(server, addr, | |
2037 | (struct sockaddr *)&vol->srcaddr)) | |
2038 | return 0; | |
2039 | ||
2040 | if (!match_port(server, addr)) | |
2041 | return 0; | |
2042 | ||
2043 | if (!match_security(server, vol)) | |
2044 | return 0; | |
2045 | ||
2046 | return 1; | |
2047 | } | |
2048 | ||
e7ddee90 | 2049 | static struct TCP_Server_Info * |
9fa114f7 | 2050 | cifs_find_tcp_session(struct smb_vol *vol) |
1da177e4 | 2051 | { |
e7ddee90 | 2052 | struct TCP_Server_Info *server; |
e7ddee90 | 2053 | |
3f9bcca7 | 2054 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 2055 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
9fa114f7 | 2056 | if (!match_server(server, vol)) |
daf5b0b6 JL |
2057 | continue; |
2058 | ||
e7ddee90 | 2059 | ++server->srv_count; |
3f9bcca7 | 2060 | spin_unlock(&cifs_tcp_ses_lock); |
f96637be | 2061 | cifs_dbg(FYI, "Existing tcp session with server found\n"); |
e7ddee90 | 2062 | return server; |
1da177e4 | 2063 | } |
3f9bcca7 | 2064 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2065 | return NULL; |
2066 | } | |
1b20d672 | 2067 | |
14fbf50d | 2068 | static void |
e7ddee90 | 2069 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
1da177e4 | 2070 | { |
e7ddee90 | 2071 | struct task_struct *task; |
1b20d672 | 2072 | |
3f9bcca7 | 2073 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 2074 | if (--server->srv_count > 0) { |
3f9bcca7 | 2075 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 2076 | return; |
1da177e4 | 2077 | } |
1b20d672 | 2078 | |
f1d0c998 RL |
2079 | put_net(cifs_net_ns(server)); |
2080 | ||
e7ddee90 | 2081 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 2082 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2083 | |
c74093b6 JL |
2084 | cancel_delayed_work_sync(&server->echo); |
2085 | ||
e7ddee90 JL |
2086 | spin_lock(&GlobalMid_Lock); |
2087 | server->tcpStatus = CifsExiting; | |
2088 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 2089 | |
d2b91521 | 2090 | cifs_crypto_shash_release(server); |
488f1d2d SJ |
2091 | cifs_fscache_release_client_cookie(server); |
2092 | ||
21e73393 SP |
2093 | kfree(server->session_key.response); |
2094 | server->session_key.response = NULL; | |
2095 | server->session_key.len = 0; | |
2096 | ||
e7ddee90 JL |
2097 | task = xchg(&server->tsk, NULL); |
2098 | if (task) | |
2099 | force_sig(SIGKILL, task); | |
1da177e4 LT |
2100 | } |
2101 | ||
63c038c2 JL |
2102 | static struct TCP_Server_Info * |
2103 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
2104 | { | |
2105 | struct TCP_Server_Info *tcp_ses = NULL; | |
63c038c2 JL |
2106 | int rc; |
2107 | ||
f96637be | 2108 | cifs_dbg(FYI, "UNC: %s\n", volume_info->UNC); |
63c038c2 JL |
2109 | |
2110 | /* see if we already have a matching tcp_ses */ | |
9fa114f7 | 2111 | tcp_ses = cifs_find_tcp_session(volume_info); |
63c038c2 JL |
2112 | if (tcp_ses) |
2113 | return tcp_ses; | |
2114 | ||
2115 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
2116 | if (!tcp_ses) { | |
2117 | rc = -ENOMEM; | |
2118 | goto out_err; | |
2119 | } | |
2120 | ||
d2b91521 SP |
2121 | rc = cifs_crypto_shash_allocate(tcp_ses); |
2122 | if (rc) { | |
f96637be | 2123 | cifs_dbg(VFS, "could not setup hash structures rc %d\n", rc); |
d2b91521 SP |
2124 | goto out_err; |
2125 | } | |
2126 | ||
23db65f5 JL |
2127 | tcp_ses->ops = volume_info->ops; |
2128 | tcp_ses->vals = volume_info->vals; | |
f1d0c998 | 2129 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
2130 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
2131 | if (IS_ERR(tcp_ses->hostname)) { | |
2132 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 2133 | goto out_err_crypto_release; |
63c038c2 JL |
2134 | } |
2135 | ||
2136 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
2137 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 2138 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
fc40f9cf | 2139 | tcp_ses->in_flight = 0; |
2d86dbc9 | 2140 | tcp_ses->credits = 1; |
63c038c2 JL |
2141 | init_waitqueue_head(&tcp_ses->response_q); |
2142 | init_waitqueue_head(&tcp_ses->request_q); | |
2143 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
2144 | mutex_init(&tcp_ses->srv_mutex); | |
2145 | memcpy(tcp_ses->workstation_RFC1001_name, | |
2146 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
2147 | memcpy(tcp_ses->server_RFC1001_name, | |
2148 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 2149 | tcp_ses->session_estab = false; |
63c038c2 | 2150 | tcp_ses->sequence_number = 0; |
fda35943 | 2151 | tcp_ses->lstrp = jiffies; |
58fa015f | 2152 | spin_lock_init(&tcp_ses->req_lock); |
63c038c2 JL |
2153 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
2154 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 2155 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
9fa114f7 JL |
2156 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
2157 | sizeof(tcp_ses->srcaddr)); | |
2158 | memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr, | |
2159 | sizeof(tcp_ses->dstaddr)); | |
63c038c2 JL |
2160 | /* |
2161 | * at this point we are the only ones with the pointer | |
2162 | * to the struct since the kernel thread not created yet | |
2163 | * no need to spinlock this init of tcpStatus or srv_count | |
2164 | */ | |
2165 | tcp_ses->tcpStatus = CifsNew; | |
2166 | ++tcp_ses->srv_count; | |
2167 | ||
a9f1b85e | 2168 | rc = ip_connect(tcp_ses); |
63c038c2 | 2169 | if (rc < 0) { |
f96637be | 2170 | cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n"); |
f7c5445a | 2171 | goto out_err_crypto_release; |
63c038c2 JL |
2172 | } |
2173 | ||
2174 | /* | |
2175 | * since we're in a cifs function already, we know that | |
2176 | * this will succeed. No need for try_module_get(). | |
2177 | */ | |
2178 | __module_get(THIS_MODULE); | |
7c97c200 | 2179 | tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, |
63c038c2 JL |
2180 | tcp_ses, "cifsd"); |
2181 | if (IS_ERR(tcp_ses->tsk)) { | |
2182 | rc = PTR_ERR(tcp_ses->tsk); | |
f96637be | 2183 | cifs_dbg(VFS, "error %d create cifsd thread\n", rc); |
63c038c2 | 2184 | module_put(THIS_MODULE); |
f7c5445a | 2185 | goto out_err_crypto_release; |
63c038c2 | 2186 | } |
fd88ce93 | 2187 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
63c038c2 JL |
2188 | |
2189 | /* thread spawned, put it on the list */ | |
3f9bcca7 | 2190 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 2191 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 2192 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 2193 | |
488f1d2d SJ |
2194 | cifs_fscache_get_client_cookie(tcp_ses); |
2195 | ||
c74093b6 | 2196 | /* queue echo request delayed work */ |
da472fc8 | 2197 | queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL); |
c74093b6 | 2198 | |
63c038c2 JL |
2199 | return tcp_ses; |
2200 | ||
f7c5445a | 2201 | out_err_crypto_release: |
d2b91521 SP |
2202 | cifs_crypto_shash_release(tcp_ses); |
2203 | ||
f1d0c998 RL |
2204 | put_net(cifs_net_ns(tcp_ses)); |
2205 | ||
63c038c2 JL |
2206 | out_err: |
2207 | if (tcp_ses) { | |
8347a5cd SF |
2208 | if (!IS_ERR(tcp_ses->hostname)) |
2209 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
2210 | if (tcp_ses->ssocket) |
2211 | sock_release(tcp_ses->ssocket); | |
2212 | kfree(tcp_ses); | |
2213 | } | |
2214 | return ERR_PTR(rc); | |
2215 | } | |
2216 | ||
96daf2b0 | 2217 | static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
37bb04e5 PS |
2218 | { |
2219 | switch (ses->server->secType) { | |
2220 | case Kerberos: | |
64ed39dd | 2221 | if (!uid_eq(vol->cred_uid, ses->cred_uid)) |
37bb04e5 PS |
2222 | return 0; |
2223 | break; | |
2224 | default: | |
04febabc JL |
2225 | /* NULL username means anonymous session */ |
2226 | if (ses->user_name == NULL) { | |
2227 | if (!vol->nullauth) | |
2228 | return 0; | |
2229 | break; | |
2230 | } | |
2231 | ||
37bb04e5 | 2232 | /* anything else takes username/password */ |
04febabc JL |
2233 | if (strncmp(ses->user_name, |
2234 | vol->username ? vol->username : "", | |
37bb04e5 PS |
2235 | MAX_USERNAME_SIZE)) |
2236 | return 0; | |
2237 | if (strlen(vol->username) != 0 && | |
2238 | ses->password != NULL && | |
2239 | strncmp(ses->password, | |
2240 | vol->password ? vol->password : "", | |
2241 | MAX_PASSWORD_SIZE)) | |
2242 | return 0; | |
2243 | } | |
2244 | return 1; | |
2245 | } | |
2246 | ||
96daf2b0 | 2247 | static struct cifs_ses * |
4ff67b72 | 2248 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 2249 | { |
96daf2b0 | 2250 | struct cifs_ses *ses; |
dea570e0 | 2251 | |
3f9bcca7 | 2252 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 | 2253 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
37bb04e5 PS |
2254 | if (!match_session(ses, vol)) |
2255 | continue; | |
14fbf50d | 2256 | ++ses->ses_count; |
3f9bcca7 | 2257 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2258 | return ses; |
2259 | } | |
3f9bcca7 | 2260 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2261 | return NULL; |
2262 | } | |
dea570e0 | 2263 | |
14fbf50d | 2264 | static void |
96daf2b0 | 2265 | cifs_put_smb_ses(struct cifs_ses *ses) |
14fbf50d | 2266 | { |
58c45c58 | 2267 | unsigned int xid; |
14fbf50d | 2268 | struct TCP_Server_Info *server = ses->server; |
dea570e0 | 2269 | |
f96637be | 2270 | cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count); |
3f9bcca7 | 2271 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 2272 | if (--ses->ses_count > 0) { |
3f9bcca7 | 2273 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2274 | return; |
2275 | } | |
dea570e0 | 2276 | |
14fbf50d | 2277 | list_del_init(&ses->smb_ses_list); |
3f9bcca7 | 2278 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2279 | |
58c45c58 | 2280 | if (ses->status == CifsGood && server->ops->logoff) { |
6d5786a3 | 2281 | xid = get_xid(); |
58c45c58 | 2282 | server->ops->logoff(xid, ses); |
6d5786a3 | 2283 | _free_xid(xid); |
14fbf50d JL |
2284 | } |
2285 | sesInfoFree(ses); | |
2286 | cifs_put_tcp_session(server); | |
2287 | } | |
dea570e0 | 2288 | |
8a8798a5 JL |
2289 | #ifdef CONFIG_KEYS |
2290 | ||
2291 | /* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */ | |
2292 | #define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1) | |
2293 | ||
2294 | /* Populate username and pw fields from keyring if possible */ | |
2295 | static int | |
2296 | cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) | |
2297 | { | |
2298 | int rc = 0; | |
2299 | char *desc, *delim, *payload; | |
2300 | ssize_t len; | |
2301 | struct key *key; | |
2302 | struct TCP_Server_Info *server = ses->server; | |
2303 | struct sockaddr_in *sa; | |
2304 | struct sockaddr_in6 *sa6; | |
2305 | struct user_key_payload *upayload; | |
2306 | ||
2307 | desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL); | |
2308 | if (!desc) | |
2309 | return -ENOMEM; | |
2310 | ||
2311 | /* try to find an address key first */ | |
2312 | switch (server->dstaddr.ss_family) { | |
2313 | case AF_INET: | |
2314 | sa = (struct sockaddr_in *)&server->dstaddr; | |
2315 | sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr); | |
2316 | break; | |
2317 | case AF_INET6: | |
2318 | sa6 = (struct sockaddr_in6 *)&server->dstaddr; | |
2319 | sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr); | |
2320 | break; | |
2321 | default: | |
f96637be JP |
2322 | cifs_dbg(FYI, "Bad ss_family (%hu)\n", |
2323 | server->dstaddr.ss_family); | |
8a8798a5 JL |
2324 | rc = -EINVAL; |
2325 | goto out_err; | |
2326 | } | |
2327 | ||
f96637be | 2328 | cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
8a8798a5 JL |
2329 | key = request_key(&key_type_logon, desc, ""); |
2330 | if (IS_ERR(key)) { | |
2331 | if (!ses->domainName) { | |
f96637be | 2332 | cifs_dbg(FYI, "domainName is NULL\n"); |
8a8798a5 JL |
2333 | rc = PTR_ERR(key); |
2334 | goto out_err; | |
2335 | } | |
2336 | ||
2337 | /* didn't work, try to find a domain key */ | |
2338 | sprintf(desc, "cifs:d:%s", ses->domainName); | |
f96637be | 2339 | cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
8a8798a5 JL |
2340 | key = request_key(&key_type_logon, desc, ""); |
2341 | if (IS_ERR(key)) { | |
2342 | rc = PTR_ERR(key); | |
2343 | goto out_err; | |
2344 | } | |
2345 | } | |
2346 | ||
2347 | down_read(&key->sem); | |
2348 | upayload = key->payload.data; | |
2349 | if (IS_ERR_OR_NULL(upayload)) { | |
4edc53c1 | 2350 | rc = upayload ? PTR_ERR(upayload) : -EINVAL; |
8a8798a5 JL |
2351 | goto out_key_put; |
2352 | } | |
2353 | ||
2354 | /* find first : in payload */ | |
2355 | payload = (char *)upayload->data; | |
2356 | delim = strnchr(payload, upayload->datalen, ':'); | |
f96637be | 2357 | cifs_dbg(FYI, "payload=%s\n", payload); |
8a8798a5 | 2358 | if (!delim) { |
f96637be JP |
2359 | cifs_dbg(FYI, "Unable to find ':' in payload (datalen=%d)\n", |
2360 | upayload->datalen); | |
8a8798a5 JL |
2361 | rc = -EINVAL; |
2362 | goto out_key_put; | |
2363 | } | |
2364 | ||
2365 | len = delim - payload; | |
2366 | if (len > MAX_USERNAME_SIZE || len <= 0) { | |
f96637be JP |
2367 | cifs_dbg(FYI, "Bad value from username search (len=%zd)\n", |
2368 | len); | |
8a8798a5 JL |
2369 | rc = -EINVAL; |
2370 | goto out_key_put; | |
2371 | } | |
2372 | ||
2373 | vol->username = kstrndup(payload, len, GFP_KERNEL); | |
2374 | if (!vol->username) { | |
f96637be JP |
2375 | cifs_dbg(FYI, "Unable to allocate %zd bytes for username\n", |
2376 | len); | |
8a8798a5 JL |
2377 | rc = -ENOMEM; |
2378 | goto out_key_put; | |
2379 | } | |
f96637be | 2380 | cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username); |
8a8798a5 JL |
2381 | |
2382 | len = key->datalen - (len + 1); | |
2383 | if (len > MAX_PASSWORD_SIZE || len <= 0) { | |
f96637be | 2384 | cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len); |
8a8798a5 JL |
2385 | rc = -EINVAL; |
2386 | kfree(vol->username); | |
2387 | vol->username = NULL; | |
2388 | goto out_key_put; | |
2389 | } | |
2390 | ||
2391 | ++delim; | |
2392 | vol->password = kstrndup(delim, len, GFP_KERNEL); | |
2393 | if (!vol->password) { | |
f96637be JP |
2394 | cifs_dbg(FYI, "Unable to allocate %zd bytes for password\n", |
2395 | len); | |
8a8798a5 JL |
2396 | rc = -ENOMEM; |
2397 | kfree(vol->username); | |
2398 | vol->username = NULL; | |
2399 | goto out_key_put; | |
2400 | } | |
2401 | ||
2402 | out_key_put: | |
2403 | up_read(&key->sem); | |
2404 | key_put(key); | |
2405 | out_err: | |
2406 | kfree(desc); | |
f96637be | 2407 | cifs_dbg(FYI, "%s: returning %d\n", __func__, rc); |
8a8798a5 JL |
2408 | return rc; |
2409 | } | |
2410 | #else /* ! CONFIG_KEYS */ | |
2411 | static inline int | |
2412 | cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), | |
2413 | struct cifs_ses *ses __attribute__((unused))) | |
2414 | { | |
2415 | return -ENOSYS; | |
2416 | } | |
2417 | #endif /* CONFIG_KEYS */ | |
2418 | ||
96daf2b0 | 2419 | static struct cifs_ses * |
36988c76 JL |
2420 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
2421 | { | |
286170aa PS |
2422 | int rc = -ENOMEM; |
2423 | unsigned int xid; | |
96daf2b0 | 2424 | struct cifs_ses *ses; |
a9f1b85e PS |
2425 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
2426 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 | 2427 | |
6d5786a3 | 2428 | xid = get_xid(); |
36988c76 | 2429 | |
4ff67b72 | 2430 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 | 2431 | if (ses) { |
f96637be JP |
2432 | cifs_dbg(FYI, "Existing smb sess found (status=%d)\n", |
2433 | ses->status); | |
36988c76 | 2434 | |
36988c76 | 2435 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
2436 | rc = cifs_negotiate_protocol(xid, ses); |
2437 | if (rc) { | |
2438 | mutex_unlock(&ses->session_mutex); | |
2439 | /* problem -- put our ses reference */ | |
2440 | cifs_put_smb_ses(ses); | |
6d5786a3 | 2441 | free_xid(xid); |
198b5682 JL |
2442 | return ERR_PTR(rc); |
2443 | } | |
36988c76 | 2444 | if (ses->need_reconnect) { |
f96637be | 2445 | cifs_dbg(FYI, "Session needs reconnect\n"); |
36988c76 JL |
2446 | rc = cifs_setup_session(xid, ses, |
2447 | volume_info->local_nls); | |
2448 | if (rc) { | |
2449 | mutex_unlock(&ses->session_mutex); | |
2450 | /* problem -- put our reference */ | |
2451 | cifs_put_smb_ses(ses); | |
6d5786a3 | 2452 | free_xid(xid); |
36988c76 JL |
2453 | return ERR_PTR(rc); |
2454 | } | |
2455 | } | |
2456 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
2457 | |
2458 | /* existing SMB ses has a server reference already */ | |
2459 | cifs_put_tcp_session(server); | |
6d5786a3 | 2460 | free_xid(xid); |
36988c76 JL |
2461 | return ses; |
2462 | } | |
2463 | ||
f96637be | 2464 | cifs_dbg(FYI, "Existing smb sess not found\n"); |
36988c76 JL |
2465 | ses = sesInfoAlloc(); |
2466 | if (ses == NULL) | |
2467 | goto get_ses_fail; | |
2468 | ||
2469 | /* new SMB session uses our server ref */ | |
2470 | ses->server = server; | |
a9f1b85e PS |
2471 | if (server->dstaddr.ss_family == AF_INET6) |
2472 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 2473 | else |
a9f1b85e | 2474 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 2475 | |
8727c8a8 SF |
2476 | if (volume_info->username) { |
2477 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
2478 | if (!ses->user_name) | |
2479 | goto get_ses_fail; | |
2480 | } | |
36988c76 JL |
2481 | |
2482 | /* volume_info->password freed at unmount */ | |
2483 | if (volume_info->password) { | |
2484 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2485 | if (!ses->password) | |
2486 | goto get_ses_fail; | |
2487 | } | |
2488 | if (volume_info->domainname) { | |
d3686d54 SP |
2489 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
2490 | if (!ses->domainName) | |
2491 | goto get_ses_fail; | |
36988c76 | 2492 | } |
3e4b3e1f | 2493 | ses->cred_uid = volume_info->cred_uid; |
36988c76 | 2494 | ses->linux_uid = volume_info->linux_uid; |
d9b94201 | 2495 | |
36988c76 JL |
2496 | ses->overrideSecFlg = volume_info->secFlg; |
2497 | ||
2498 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
2499 | rc = cifs_negotiate_protocol(xid, ses); |
2500 | if (!rc) | |
2501 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 2502 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 2503 | if (rc) |
36988c76 JL |
2504 | goto get_ses_fail; |
2505 | ||
2506 | /* success, put it on the list */ | |
3f9bcca7 | 2507 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 2508 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 2509 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 | 2510 | |
6d5786a3 | 2511 | free_xid(xid); |
36988c76 JL |
2512 | return ses; |
2513 | ||
2514 | get_ses_fail: | |
2515 | sesInfoFree(ses); | |
6d5786a3 | 2516 | free_xid(xid); |
36988c76 JL |
2517 | return ERR_PTR(rc); |
2518 | } | |
2519 | ||
96daf2b0 | 2520 | static int match_tcon(struct cifs_tcon *tcon, const char *unc) |
37bb04e5 PS |
2521 | { |
2522 | if (tcon->tidStatus == CifsExiting) | |
2523 | return 0; | |
2524 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) | |
2525 | return 0; | |
2526 | return 1; | |
2527 | } | |
2528 | ||
96daf2b0 SF |
2529 | static struct cifs_tcon * |
2530 | cifs_find_tcon(struct cifs_ses *ses, const char *unc) | |
f1987b44 JL |
2531 | { |
2532 | struct list_head *tmp; | |
96daf2b0 | 2533 | struct cifs_tcon *tcon; |
f1987b44 | 2534 | |
3f9bcca7 | 2535 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2536 | list_for_each(tmp, &ses->tcon_list) { |
96daf2b0 | 2537 | tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
37bb04e5 | 2538 | if (!match_tcon(tcon, unc)) |
f1987b44 | 2539 | continue; |
f1987b44 | 2540 | ++tcon->tc_count; |
3f9bcca7 | 2541 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2542 | return tcon; |
1da177e4 | 2543 | } |
3f9bcca7 | 2544 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2545 | return NULL; |
2546 | } | |
2547 | ||
f1987b44 | 2548 | static void |
96daf2b0 | 2549 | cifs_put_tcon(struct cifs_tcon *tcon) |
f1987b44 | 2550 | { |
2e6e02ab | 2551 | unsigned int xid; |
96daf2b0 | 2552 | struct cifs_ses *ses = tcon->ses; |
f1987b44 | 2553 | |
f96637be | 2554 | cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
3f9bcca7 | 2555 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2556 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 2557 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2558 | return; |
2559 | } | |
2560 | ||
2561 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 2562 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 | 2563 | |
6d5786a3 | 2564 | xid = get_xid(); |
2e6e02ab PS |
2565 | if (ses->server->ops->tree_disconnect) |
2566 | ses->server->ops->tree_disconnect(xid, tcon); | |
6d5786a3 | 2567 | _free_xid(xid); |
f1987b44 | 2568 | |
d03382ce | 2569 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 2570 | tconInfoFree(tcon); |
f1987b44 JL |
2571 | cifs_put_smb_ses(ses); |
2572 | } | |
2573 | ||
96daf2b0 SF |
2574 | static struct cifs_tcon * |
2575 | cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) | |
d00c28de JL |
2576 | { |
2577 | int rc, xid; | |
96daf2b0 | 2578 | struct cifs_tcon *tcon; |
d00c28de JL |
2579 | |
2580 | tcon = cifs_find_tcon(ses, volume_info->UNC); | |
2581 | if (tcon) { | |
f96637be | 2582 | cifs_dbg(FYI, "Found match on UNC path\n"); |
d00c28de JL |
2583 | /* existing tcon already has a reference */ |
2584 | cifs_put_smb_ses(ses); | |
2585 | if (tcon->seal != volume_info->seal) | |
f96637be | 2586 | cifs_dbg(VFS, "transport encryption setting conflicts with existing tid\n"); |
d00c28de JL |
2587 | return tcon; |
2588 | } | |
2589 | ||
2e6e02ab PS |
2590 | if (!ses->server->ops->tree_connect) { |
2591 | rc = -ENOSYS; | |
2592 | goto out_fail; | |
2593 | } | |
2594 | ||
d00c28de JL |
2595 | tcon = tconInfoAlloc(); |
2596 | if (tcon == NULL) { | |
2597 | rc = -ENOMEM; | |
2598 | goto out_fail; | |
2599 | } | |
2600 | ||
2601 | tcon->ses = ses; | |
2602 | if (volume_info->password) { | |
2603 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2604 | if (!tcon->password) { | |
2605 | rc = -ENOMEM; | |
2606 | goto out_fail; | |
2607 | } | |
2608 | } | |
2609 | ||
2e6e02ab PS |
2610 | /* |
2611 | * BB Do we need to wrap session_mutex around this TCon call and Unix | |
2612 | * SetFS as we do on SessSetup and reconnect? | |
2613 | */ | |
6d5786a3 | 2614 | xid = get_xid(); |
2e6e02ab PS |
2615 | rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon, |
2616 | volume_info->local_nls); | |
6d5786a3 | 2617 | free_xid(xid); |
f96637be | 2618 | cifs_dbg(FYI, "Tcon rc = %d\n", rc); |
d00c28de JL |
2619 | if (rc) |
2620 | goto out_fail; | |
2621 | ||
2622 | if (volume_info->nodfs) { | |
2623 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
f96637be | 2624 | cifs_dbg(FYI, "DFS disabled (%d)\n", tcon->Flags); |
d00c28de JL |
2625 | } |
2626 | tcon->seal = volume_info->seal; | |
2e6e02ab PS |
2627 | /* |
2628 | * We can have only one retry value for a connection to a share so for | |
2629 | * resources mounted more than once to the same server share the last | |
2630 | * value passed in for the retry flag is used. | |
2631 | */ | |
d00c28de JL |
2632 | tcon->retry = volume_info->retry; |
2633 | tcon->nocase = volume_info->nocase; | |
2634 | tcon->local_lease = volume_info->local_lease; | |
233839b1 | 2635 | INIT_LIST_HEAD(&tcon->pending_opens); |
d00c28de | 2636 | |
3f9bcca7 | 2637 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 2638 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 2639 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 2640 | |
d03382ce SJ |
2641 | cifs_fscache_get_super_cookie(tcon); |
2642 | ||
d00c28de JL |
2643 | return tcon; |
2644 | ||
2645 | out_fail: | |
2646 | tconInfoFree(tcon); | |
2647 | return ERR_PTR(rc); | |
2648 | } | |
2649 | ||
9d002df4 JL |
2650 | void |
2651 | cifs_put_tlink(struct tcon_link *tlink) | |
2652 | { | |
2653 | if (!tlink || IS_ERR(tlink)) | |
2654 | return; | |
2655 | ||
2656 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
2657 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
2658 | tlink->tl_time = jiffies; | |
2659 | return; | |
2660 | } | |
2661 | ||
2662 | if (!IS_ERR(tlink_tcon(tlink))) | |
2663 | cifs_put_tcon(tlink_tcon(tlink)); | |
2664 | kfree(tlink); | |
2665 | return; | |
2666 | } | |
d00c28de | 2667 | |
25c7f41e | 2668 | static inline struct tcon_link * |
cd51875d PS |
2669 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
2670 | { | |
2671 | return cifs_sb->master_tlink; | |
2672 | } | |
25c7f41e PS |
2673 | |
2674 | static int | |
2675 | compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
2676 | { | |
2677 | struct cifs_sb_info *old = CIFS_SB(sb); | |
2678 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
2679 | ||
2680 | if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) | |
2681 | return 0; | |
2682 | ||
2683 | if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) != | |
2684 | (new->mnt_cifs_flags & CIFS_MOUNT_MASK)) | |
2685 | return 0; | |
2686 | ||
25c7f41e | 2687 | /* |
5eba8ab3 JL |
2688 | * We want to share sb only if we don't specify an r/wsize or |
2689 | * specified r/wsize is greater than or equal to existing one. | |
25c7f41e PS |
2690 | */ |
2691 | if (new->wsize && new->wsize < old->wsize) | |
2692 | return 0; | |
2693 | ||
5eba8ab3 JL |
2694 | if (new->rsize && new->rsize < old->rsize) |
2695 | return 0; | |
2696 | ||
1f68233c | 2697 | if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid)) |
25c7f41e PS |
2698 | return 0; |
2699 | ||
2700 | if (old->mnt_file_mode != new->mnt_file_mode || | |
2701 | old->mnt_dir_mode != new->mnt_dir_mode) | |
2702 | return 0; | |
2703 | ||
2704 | if (strcmp(old->local_nls->charset, new->local_nls->charset)) | |
2705 | return 0; | |
2706 | ||
2707 | if (old->actimeo != new->actimeo) | |
2708 | return 0; | |
2709 | ||
2710 | return 1; | |
2711 | } | |
2712 | ||
2713 | int | |
2714 | cifs_match_super(struct super_block *sb, void *data) | |
2715 | { | |
2716 | struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; | |
2717 | struct smb_vol *volume_info; | |
2718 | struct cifs_sb_info *cifs_sb; | |
2719 | struct TCP_Server_Info *tcp_srv; | |
96daf2b0 SF |
2720 | struct cifs_ses *ses; |
2721 | struct cifs_tcon *tcon; | |
25c7f41e | 2722 | struct tcon_link *tlink; |
25c7f41e PS |
2723 | int rc = 0; |
2724 | ||
25c7f41e PS |
2725 | spin_lock(&cifs_tcp_ses_lock); |
2726 | cifs_sb = CIFS_SB(sb); | |
2727 | tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
2728 | if (IS_ERR(tlink)) { | |
2729 | spin_unlock(&cifs_tcp_ses_lock); | |
2730 | return rc; | |
2731 | } | |
2732 | tcon = tlink_tcon(tlink); | |
2733 | ses = tcon->ses; | |
2734 | tcp_srv = ses->server; | |
2735 | ||
2736 | volume_info = mnt_data->vol; | |
2737 | ||
9fa114f7 | 2738 | if (!match_server(tcp_srv, volume_info) || |
25c7f41e PS |
2739 | !match_session(ses, volume_info) || |
2740 | !match_tcon(tcon, volume_info->UNC)) { | |
2741 | rc = 0; | |
2742 | goto out; | |
2743 | } | |
2744 | ||
2745 | rc = compare_mount_options(sb, mnt_data); | |
2746 | out: | |
25c7f41e | 2747 | spin_unlock(&cifs_tcp_ses_lock); |
f484b5d0 | 2748 | cifs_put_tlink(tlink); |
25c7f41e PS |
2749 | return rc; |
2750 | } | |
2751 | ||
1da177e4 | 2752 | int |
b669f33c | 2753 | get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path, |
2e6e02ab PS |
2754 | const struct nls_table *nls_codepage, unsigned int *num_referrals, |
2755 | struct dfs_info3_param **referrals, int remap) | |
1da177e4 LT |
2756 | { |
2757 | char *temp_unc; | |
2758 | int rc = 0; | |
2759 | ||
b669f33c | 2760 | if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer) |
2e6e02ab PS |
2761 | return -ENOSYS; |
2762 | ||
2763 | *num_referrals = 0; | |
2764 | *referrals = NULL; | |
1da177e4 | 2765 | |
2e6e02ab | 2766 | if (ses->ipc_tid == 0) { |
1da177e4 | 2767 | temp_unc = kmalloc(2 /* for slashes */ + |
2e6e02ab PS |
2768 | strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2) |
2769 | + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL); | |
1da177e4 LT |
2770 | if (temp_unc == NULL) |
2771 | return -ENOMEM; | |
2772 | temp_unc[0] = '\\'; | |
2773 | temp_unc[1] = '\\'; | |
2e6e02ab PS |
2774 | strcpy(temp_unc + 2, ses->serverName); |
2775 | strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$"); | |
2776 | rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL, | |
2777 | nls_codepage); | |
f96637be | 2778 | cifs_dbg(FYI, "Tcon rc = %d ipc_tid = %d\n", rc, ses->ipc_tid); |
1da177e4 LT |
2779 | kfree(temp_unc); |
2780 | } | |
2781 | if (rc == 0) | |
b669f33c PS |
2782 | rc = ses->server->ops->get_dfs_refer(xid, ses, old_path, |
2783 | referrals, num_referrals, | |
2784 | nls_codepage, remap); | |
2e6e02ab PS |
2785 | /* |
2786 | * BB - map targetUNCs to dfs_info3 structures, here or in | |
b669f33c | 2787 | * ses->server->ops->get_dfs_refer. |
2e6e02ab | 2788 | */ |
1da177e4 LT |
2789 | |
2790 | return rc; | |
2791 | } | |
2792 | ||
09e50d55 JL |
2793 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
2794 | static struct lock_class_key cifs_key[2]; | |
2795 | static struct lock_class_key cifs_slock_key[2]; | |
2796 | ||
2797 | static inline void | |
2798 | cifs_reclassify_socket4(struct socket *sock) | |
2799 | { | |
2800 | struct sock *sk = sock->sk; | |
2801 | BUG_ON(sock_owned_by_user(sk)); | |
2802 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", | |
2803 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
2804 | } | |
2805 | ||
2806 | static inline void | |
2807 | cifs_reclassify_socket6(struct socket *sock) | |
2808 | { | |
2809 | struct sock *sk = sock->sk; | |
2810 | BUG_ON(sock_owned_by_user(sk)); | |
2811 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", | |
2812 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
2813 | } | |
2814 | #else | |
2815 | static inline void | |
2816 | cifs_reclassify_socket4(struct socket *sock) | |
2817 | { | |
2818 | } | |
2819 | ||
2820 | static inline void | |
2821 | cifs_reclassify_socket6(struct socket *sock) | |
2822 | { | |
2823 | } | |
2824 | #endif | |
2825 | ||
1da177e4 | 2826 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 2827 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 2828 | { |
50c2f753 | 2829 | unsigned int i, j; |
1da177e4 | 2830 | |
50c2f753 | 2831 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
2832 | /* mask a nibble at a time and encode */ |
2833 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
2834 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 2835 | j += 2; |
1da177e4 LT |
2836 | } |
2837 | ||
2838 | } | |
2839 | ||
3eb9a889 BG |
2840 | static int |
2841 | bind_socket(struct TCP_Server_Info *server) | |
2842 | { | |
2843 | int rc = 0; | |
2844 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
2845 | /* Bind to the specified local IP address */ | |
2846 | struct socket *socket = server->ssocket; | |
2847 | rc = socket->ops->bind(socket, | |
2848 | (struct sockaddr *) &server->srcaddr, | |
2849 | sizeof(server->srcaddr)); | |
2850 | if (rc < 0) { | |
2851 | struct sockaddr_in *saddr4; | |
2852 | struct sockaddr_in6 *saddr6; | |
2853 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
2854 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
2855 | if (saddr6->sin6_family == AF_INET6) | |
f96637be JP |
2856 | cifs_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n", |
2857 | &saddr6->sin6_addr, rc); | |
3eb9a889 | 2858 | else |
f96637be JP |
2859 | cifs_dbg(VFS, "Failed to bind to: %pI4, error: %d\n", |
2860 | &saddr4->sin_addr.s_addr, rc); | |
3eb9a889 BG |
2861 | } |
2862 | } | |
2863 | return rc; | |
2864 | } | |
1da177e4 LT |
2865 | |
2866 | static int | |
a9f1b85e | 2867 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
2868 | { |
2869 | int rc = 0; | |
a9f1b85e PS |
2870 | /* |
2871 | * some servers require RFC1001 sessinit before sending | |
2872 | * negprot - BB check reconnection in case where second | |
2873 | * sessinit is sent but no second negprot | |
2874 | */ | |
2875 | struct rfc1002_session_packet *ses_init_buf; | |
2876 | struct smb_hdr *smb_buf; | |
2877 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
2878 | GFP_KERNEL); | |
2879 | if (ses_init_buf) { | |
2880 | ses_init_buf->trailer.session_req.called_len = 32; | |
2881 | ||
2882 | if (server->server_RFC1001_name && | |
2883 | server->server_RFC1001_name[0] != 0) | |
2884 | rfc1002mangle(ses_init_buf->trailer. | |
2885 | session_req.called_name, | |
2886 | server->server_RFC1001_name, | |
2887 | RFC1001_NAME_LEN_WITH_NULL); | |
2888 | else | |
2889 | rfc1002mangle(ses_init_buf->trailer. | |
2890 | session_req.called_name, | |
2891 | DEFAULT_CIFS_CALLED_NAME, | |
2892 | RFC1001_NAME_LEN_WITH_NULL); | |
2893 | ||
2894 | ses_init_buf->trailer.session_req.calling_len = 32; | |
2895 | ||
2896 | /* | |
2897 | * calling name ends in null (byte 16) from old smb | |
2898 | * convention. | |
2899 | */ | |
2900 | if (server->workstation_RFC1001_name && | |
2901 | server->workstation_RFC1001_name[0] != 0) | |
2902 | rfc1002mangle(ses_init_buf->trailer. | |
2903 | session_req.calling_name, | |
2904 | server->workstation_RFC1001_name, | |
2905 | RFC1001_NAME_LEN_WITH_NULL); | |
2906 | else | |
2907 | rfc1002mangle(ses_init_buf->trailer. | |
2908 | session_req.calling_name, | |
2909 | "LINUX_CIFS_CLNT", | |
2910 | RFC1001_NAME_LEN_WITH_NULL); | |
2911 | ||
2912 | ses_init_buf->trailer.session_req.scope1 = 0; | |
2913 | ses_init_buf->trailer.session_req.scope2 = 0; | |
2914 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
2915 | ||
2916 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
be8e3b00 | 2917 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
a9f1b85e PS |
2918 | rc = smb_send(server, smb_buf, 0x44); |
2919 | kfree(ses_init_buf); | |
2920 | /* | |
2921 | * RFC1001 layer in at least one server | |
2922 | * requires very short break before negprot | |
2923 | * presumably because not expecting negprot | |
2924 | * to follow so fast. This is a simple | |
2925 | * solution that works without | |
2926 | * complicating the code and causes no | |
2927 | * significant slowing down on mount | |
2928 | * for everyone else | |
2929 | */ | |
2930 | usleep_range(1000, 2000); | |
2931 | } | |
2932 | /* | |
2933 | * else the negprot may still work without this | |
2934 | * even though malloc failed | |
2935 | */ | |
2936 | ||
2937 | return rc; | |
2938 | } | |
2939 | ||
2940 | static int | |
2941 | generic_ip_connect(struct TCP_Server_Info *server) | |
2942 | { | |
2943 | int rc = 0; | |
6da97910 | 2944 | __be16 sport; |
a9f1b85e | 2945 | int slen, sfamily; |
bcf4b106 | 2946 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
2947 | struct sockaddr *saddr; |
2948 | ||
2949 | saddr = (struct sockaddr *) &server->dstaddr; | |
2950 | ||
2951 | if (server->dstaddr.ss_family == AF_INET6) { | |
2952 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
2953 | slen = sizeof(struct sockaddr_in6); | |
2954 | sfamily = AF_INET6; | |
2955 | } else { | |
2956 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
2957 | slen = sizeof(struct sockaddr_in); | |
2958 | sfamily = AF_INET; | |
2959 | } | |
1da177e4 | 2960 | |
bcf4b106 | 2961 | if (socket == NULL) { |
f1d0c998 RL |
2962 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
2963 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 2964 | if (rc < 0) { |
f96637be | 2965 | cifs_dbg(VFS, "Error %d creating socket\n", rc); |
a9f1b85e | 2966 | server->ssocket = NULL; |
1da177e4 | 2967 | return rc; |
1da177e4 | 2968 | } |
bcf4b106 JL |
2969 | |
2970 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
f96637be | 2971 | cifs_dbg(FYI, "Socket created\n"); |
bcf4b106 JL |
2972 | server->ssocket = socket; |
2973 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
2974 | if (sfamily == AF_INET6) |
2975 | cifs_reclassify_socket6(socket); | |
2976 | else | |
2977 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
2978 | } |
2979 | ||
3eb9a889 BG |
2980 | rc = bind_socket(server); |
2981 | if (rc < 0) | |
2982 | return rc; | |
2983 | ||
bcf4b106 JL |
2984 | /* |
2985 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
2986 | * the default. sock_setsockopt not used because it expects |
2987 | * user space buffer | |
bcf4b106 JL |
2988 | */ |
2989 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 2990 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 2991 | |
b387eaeb | 2992 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
2993 | if (server->noautotune) { |
2994 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
2995 | socket->sk->sk_sndbuf = 200 * 1024; | |
2996 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
2997 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 2998 | } |
1da177e4 | 2999 | |
6a5fa236 | 3000 | if (server->tcp_nodelay) { |
a9f1b85e | 3001 | int val = 1; |
6a5fa236 SF |
3002 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
3003 | (char *)&val, sizeof(val)); | |
3004 | if (rc) | |
f96637be JP |
3005 | cifs_dbg(FYI, "set TCP_NODELAY socket option error %d\n", |
3006 | rc); | |
6a5fa236 SF |
3007 | } |
3008 | ||
f96637be | 3009 | cifs_dbg(FYI, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n", |
bcf4b106 | 3010 | socket->sk->sk_sndbuf, |
b6b38f70 | 3011 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 3012 | |
ee1b3ea9 JL |
3013 | rc = socket->ops->connect(socket, saddr, slen, 0); |
3014 | if (rc < 0) { | |
f96637be | 3015 | cifs_dbg(FYI, "Error %d connecting to server\n", rc); |
ee1b3ea9 JL |
3016 | sock_release(socket); |
3017 | server->ssocket = NULL; | |
3018 | return rc; | |
3019 | } | |
3020 | ||
a9f1b85e PS |
3021 | if (sport == htons(RFC1001_PORT)) |
3022 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 3023 | |
1da177e4 LT |
3024 | return rc; |
3025 | } | |
3026 | ||
3027 | static int | |
a9f1b85e | 3028 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 3029 | { |
6da97910 | 3030 | __be16 *sport; |
a9f1b85e PS |
3031 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
3032 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 3033 | |
a9f1b85e PS |
3034 | if (server->dstaddr.ss_family == AF_INET6) |
3035 | sport = &addr6->sin6_port; | |
3036 | else | |
3037 | sport = &addr->sin_port; | |
1da177e4 | 3038 | |
a9f1b85e PS |
3039 | if (*sport == 0) { |
3040 | int rc; | |
1da177e4 | 3041 | |
a9f1b85e PS |
3042 | /* try with 445 port at first */ |
3043 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 3044 | |
a9f1b85e | 3045 | rc = generic_ip_connect(server); |
1da177e4 | 3046 | if (rc >= 0) |
a9f1b85e | 3047 | return rc; |
6a5fa236 | 3048 | |
a9f1b85e PS |
3049 | /* if it failed, try with 139 port */ |
3050 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
3051 | } |
3052 | ||
a9f1b85e | 3053 | return generic_ip_connect(server); |
1da177e4 LT |
3054 | } |
3055 | ||
6d5786a3 | 3056 | void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon, |
2c6292ae | 3057 | struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) |
8af18971 SF |
3058 | { |
3059 | /* if we are reconnecting then should we check to see if | |
3060 | * any requested capabilities changed locally e.g. via | |
3061 | * remount but we can not do much about it here | |
3062 | * if they have (even if we could detect it by the following) | |
3063 | * Perhaps we could add a backpointer to array of sb from tcon | |
3064 | * or if we change to make all sb to same share the same | |
3065 | * sb as NFS - then we only have one backpointer to sb. | |
3066 | * What if we wanted to mount the server share twice once with | |
3067 | * and once without posixacls or posix paths? */ | |
3068 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 3069 | |
c18c842b SF |
3070 | if (vol_info && vol_info->no_linux_ext) { |
3071 | tcon->fsUnixInfo.Capability = 0; | |
3072 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
f96637be | 3073 | cifs_dbg(FYI, "Linux protocol extensions disabled\n"); |
c18c842b SF |
3074 | return; |
3075 | } else if (vol_info) | |
3076 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
3077 | ||
3078 | if (tcon->unix_ext == 0) { | |
f96637be | 3079 | cifs_dbg(FYI, "Unix extensions disabled so not set on reconnect\n"); |
c18c842b SF |
3080 | return; |
3081 | } | |
50c2f753 | 3082 | |
fb8c4b14 | 3083 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 3084 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
f96637be | 3085 | cifs_dbg(FYI, "unix caps which server supports %lld\n", cap); |
8af18971 SF |
3086 | /* check for reconnect case in which we do not |
3087 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 3088 | if (vol_info == NULL) { |
50c2f753 | 3089 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
3090 | originally at mount time */ |
3091 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
3092 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
3093 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
3094 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
f96637be | 3095 | cifs_dbg(VFS, "POSIXPATH support change\n"); |
8af18971 | 3096 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 3097 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
f96637be JP |
3098 | cifs_dbg(VFS, "possible reconnect error\n"); |
3099 | cifs_dbg(VFS, "server disabled POSIX path support\n"); | |
11b6d645 | 3100 | } |
8af18971 | 3101 | } |
50c2f753 | 3102 | |
6848b733 | 3103 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
f96637be | 3104 | cifs_dbg(VFS, "per-share encryption not supported yet\n"); |
6848b733 | 3105 | |
8af18971 | 3106 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 3107 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 3108 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 3109 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
f96637be | 3110 | cifs_dbg(FYI, "negotiated posix acl support\n"); |
2c6292ae AV |
3111 | if (cifs_sb) |
3112 | cifs_sb->mnt_cifs_flags |= | |
3113 | CIFS_MOUNT_POSIXACL; | |
8af18971 SF |
3114 | } |
3115 | ||
75865f8c | 3116 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 3117 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 3118 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
f96637be | 3119 | cifs_dbg(FYI, "negotiate posix pathnames\n"); |
2c6292ae AV |
3120 | if (cifs_sb) |
3121 | cifs_sb->mnt_cifs_flags |= | |
8af18971 SF |
3122 | CIFS_MOUNT_POSIX_PATHS; |
3123 | } | |
50c2f753 | 3124 | |
f96637be | 3125 | cifs_dbg(FYI, "Negotiate caps 0x%x\n", (int)cap); |
8af18971 | 3126 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 3127 | if (cap & CIFS_UNIX_FCNTL_CAP) |
f96637be | 3128 | cifs_dbg(FYI, "FCNTL cap\n"); |
75865f8c | 3129 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
f96637be | 3130 | cifs_dbg(FYI, "EXTATTR cap\n"); |
75865f8c | 3131 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
f96637be | 3132 | cifs_dbg(FYI, "POSIX path cap\n"); |
75865f8c | 3133 | if (cap & CIFS_UNIX_XATTR_CAP) |
f96637be | 3134 | cifs_dbg(FYI, "XATTR cap\n"); |
75865f8c | 3135 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
f96637be | 3136 | cifs_dbg(FYI, "POSIX ACL cap\n"); |
75865f8c | 3137 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
f96637be | 3138 | cifs_dbg(FYI, "very large read cap\n"); |
75865f8c | 3139 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
f96637be | 3140 | cifs_dbg(FYI, "very large write cap\n"); |
6848b733 | 3141 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
f96637be | 3142 | cifs_dbg(FYI, "transport encryption cap\n"); |
6848b733 | 3143 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
f96637be | 3144 | cifs_dbg(FYI, "mandatory transport encryption cap\n"); |
8af18971 SF |
3145 | #endif /* CIFS_DEBUG2 */ |
3146 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 3147 | if (vol_info == NULL) { |
f96637be | 3148 | cifs_dbg(FYI, "resetting capabilities failed\n"); |
442aa310 | 3149 | } else |
f96637be | 3150 | 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 | 3151 | |
8af18971 SF |
3152 | } |
3153 | } | |
3154 | } | |
3155 | ||
724d9f1c PS |
3156 | void cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
3157 | struct cifs_sb_info *cifs_sb) | |
b1c8d2b4 | 3158 | { |
2de970ff JL |
3159 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
3160 | ||
2ced6f69 AV |
3161 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
3162 | cifs_sb->tlink_tree = RB_ROOT; | |
3163 | ||
25c7f41e | 3164 | /* |
5eba8ab3 JL |
3165 | * Temporarily set r/wsize for matching superblock. If we end up using |
3166 | * new sb then client will later negotiate it downward if needed. | |
25c7f41e | 3167 | */ |
5eba8ab3 | 3168 | cifs_sb->rsize = pvolume_info->rsize; |
25c7f41e PS |
3169 | cifs_sb->wsize = pvolume_info->wsize; |
3170 | ||
3b795210 SF |
3171 | cifs_sb->mnt_uid = pvolume_info->linux_uid; |
3172 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
3173 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
3174 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
f96637be JP |
3175 | cifs_dbg(FYI, "file mode: 0x%hx dir mode: 0x%hx\n", |
3176 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); | |
3b795210 | 3177 | |
6d20e840 | 3178 | cifs_sb->actimeo = pvolume_info->actimeo; |
724d9f1c | 3179 | cifs_sb->local_nls = pvolume_info->local_nls; |
6d20e840 | 3180 | |
3b795210 SF |
3181 | if (pvolume_info->noperm) |
3182 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
3183 | if (pvolume_info->setuids) | |
3184 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
3185 | if (pvolume_info->server_ino) | |
3186 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
3187 | if (pvolume_info->remap) | |
3188 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; | |
3189 | if (pvolume_info->no_xattr) | |
3190 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
3191 | if (pvolume_info->sfu_emul) | |
3192 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
3193 | if (pvolume_info->nobrl) | |
3194 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 3195 | if (pvolume_info->nostrictsync) |
4717bed6 | 3196 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
3197 | if (pvolume_info->mand_lock) |
3198 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
d4ffff1f PS |
3199 | if (pvolume_info->rwpidforward) |
3200 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; | |
3b795210 SF |
3201 | if (pvolume_info->cifs_acl) |
3202 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
3c7c87fd | 3203 | if (pvolume_info->backupuid_specified) { |
3d3ea8e6 | 3204 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; |
3c7c87fd SP |
3205 | cifs_sb->mnt_backupuid = pvolume_info->backupuid; |
3206 | } | |
3207 | if (pvolume_info->backupgid_specified) { | |
3d3ea8e6 | 3208 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; |
3c7c87fd SP |
3209 | cifs_sb->mnt_backupgid = pvolume_info->backupgid; |
3210 | } | |
3b795210 SF |
3211 | if (pvolume_info->override_uid) |
3212 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
3213 | if (pvolume_info->override_gid) | |
3214 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
3215 | if (pvolume_info->dynperm) | |
3216 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
3217 | if (pvolume_info->fsc) |
3218 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
3219 | if (pvolume_info->multiuser) |
3220 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
3221 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
3222 | if (pvolume_info->strict_io) |
3223 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 3224 | if (pvolume_info->direct_io) { |
f96637be | 3225 | cifs_dbg(FYI, "mounting share using direct i/o\n"); |
3b795210 SF |
3226 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
3227 | } | |
736a3320 SM |
3228 | if (pvolume_info->mfsymlinks) { |
3229 | if (pvolume_info->sfu_emul) { | |
f96637be | 3230 | cifs_dbg(VFS, "mount option mfsymlinks ignored if sfu mount option is used\n"); |
736a3320 SM |
3231 | } else { |
3232 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; | |
3233 | } | |
3234 | } | |
3b795210 SF |
3235 | |
3236 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
f96637be | 3237 | cifs_dbg(VFS, "mount option dynperm ignored if cifsacl mount option supported\n"); |
b1c8d2b4 JL |
3238 | } |
3239 | ||
b9bce2e9 JL |
3240 | static void |
3241 | cleanup_volume_info_contents(struct smb_vol *volume_info) | |
1bfe73c2 | 3242 | { |
b946845a | 3243 | kfree(volume_info->username); |
1bfe73c2 | 3244 | kzfree(volume_info->password); |
95c75454 | 3245 | kfree(volume_info->UNC); |
b946845a SF |
3246 | kfree(volume_info->domainname); |
3247 | kfree(volume_info->iocharset); | |
1bfe73c2 | 3248 | kfree(volume_info->prepath); |
b9bce2e9 JL |
3249 | } |
3250 | ||
3251 | void | |
3252 | cifs_cleanup_volume_info(struct smb_vol *volume_info) | |
3253 | { | |
3254 | if (!volume_info) | |
3255 | return; | |
3256 | cleanup_volume_info_contents(volume_info); | |
1bfe73c2 | 3257 | kfree(volume_info); |
1bfe73c2 IM |
3258 | } |
3259 | ||
b9bce2e9 | 3260 | |
2d6d589d | 3261 | #ifdef CONFIG_CIFS_DFS_UPCALL |
6d3ea7e4 SF |
3262 | /* |
3263 | * cifs_build_path_to_root returns full path to root when we do not have an | |
3264 | * exiting connection (tcon) | |
3265 | */ | |
1bfe73c2 | 3266 | static char * |
b2a0fa15 | 3267 | build_unc_path_to_root(const struct smb_vol *vol, |
1bfe73c2 IM |
3268 | const struct cifs_sb_info *cifs_sb) |
3269 | { | |
b2a0fa15 | 3270 | char *full_path, *pos; |
839db3d1 | 3271 | unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0; |
b2a0fa15 | 3272 | unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); |
1bfe73c2 | 3273 | |
b2a0fa15 | 3274 | full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); |
1bfe73c2 IM |
3275 | if (full_path == NULL) |
3276 | return ERR_PTR(-ENOMEM); | |
3277 | ||
b2a0fa15 JL |
3278 | strncpy(full_path, vol->UNC, unc_len); |
3279 | pos = full_path + unc_len; | |
3280 | ||
3281 | if (pplen) { | |
1fc29bac JL |
3282 | *pos = CIFS_DIR_SEP(cifs_sb); |
3283 | strncpy(pos + 1, vol->prepath, pplen); | |
b2a0fa15 JL |
3284 | pos += pplen; |
3285 | } | |
3286 | ||
3287 | *pos = '\0'; /* add trailing null */ | |
f87d39d9 | 3288 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
f96637be | 3289 | cifs_dbg(FYI, "%s: full_path=%s\n", __func__, full_path); |
1bfe73c2 IM |
3290 | return full_path; |
3291 | } | |
dd613945 SF |
3292 | |
3293 | /* | |
3294 | * Perform a dfs referral query for a share and (optionally) prefix | |
3295 | * | |
046462ab SF |
3296 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
3297 | * to a string containing updated options for the submount. Otherwise it | |
3298 | * will be left untouched. | |
dd613945 SF |
3299 | * |
3300 | * Returns the rc from get_dfs_path to the caller, which can be used to | |
3301 | * determine whether there were referrals. | |
3302 | */ | |
3303 | static int | |
b669f33c | 3304 | expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses, |
dd613945 | 3305 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, |
046462ab | 3306 | int check_prefix) |
dd613945 SF |
3307 | { |
3308 | int rc; | |
3309 | unsigned int num_referrals = 0; | |
3310 | struct dfs_info3_param *referrals = NULL; | |
3311 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; | |
3312 | ||
3313 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
3314 | if (IS_ERR(full_path)) | |
3315 | return PTR_ERR(full_path); | |
3316 | ||
3317 | /* For DFS paths, skip the first '\' of the UNC */ | |
3318 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; | |
3319 | ||
b669f33c | 3320 | rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls, |
dd613945 SF |
3321 | &num_referrals, &referrals, |
3322 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3323 | ||
3324 | if (!rc && num_referrals > 0) { | |
3325 | char *fake_devname = NULL; | |
3326 | ||
3327 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, | |
3328 | full_path + 1, referrals, | |
3329 | &fake_devname); | |
3330 | ||
3331 | free_dfs_info_array(referrals, num_referrals); | |
046462ab | 3332 | |
dd613945 SF |
3333 | if (IS_ERR(mdata)) { |
3334 | rc = PTR_ERR(mdata); | |
3335 | mdata = NULL; | |
b9bce2e9 JL |
3336 | } else { |
3337 | cleanup_volume_info_contents(volume_info); | |
b9bce2e9 JL |
3338 | rc = cifs_setup_volume_info(volume_info, mdata, |
3339 | fake_devname); | |
dd613945 | 3340 | } |
b9bce2e9 JL |
3341 | kfree(fake_devname); |
3342 | kfree(cifs_sb->mountdata); | |
046462ab | 3343 | cifs_sb->mountdata = mdata; |
dd613945 SF |
3344 | } |
3345 | kfree(full_path); | |
3346 | return rc; | |
3347 | } | |
2d6d589d | 3348 | #endif |
1bfe73c2 | 3349 | |
04db79b0 JL |
3350 | static int |
3351 | cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, | |
3352 | const char *devname) | |
1da177e4 | 3353 | { |
724d9f1c | 3354 | int rc = 0; |
1da177e4 | 3355 | |
04db79b0 JL |
3356 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) |
3357 | return -EINVAL; | |
1da177e4 | 3358 | |
7586b765 | 3359 | if (volume_info->nullauth) { |
f96637be | 3360 | cifs_dbg(FYI, "Anonymous login\n"); |
04febabc JL |
3361 | kfree(volume_info->username); |
3362 | volume_info->username = NULL; | |
7586b765 | 3363 | } else if (volume_info->username) { |
1da177e4 | 3364 | /* BB fixme parse for domain name here */ |
f96637be | 3365 | cifs_dbg(FYI, "Username: %s\n", volume_info->username); |
1da177e4 | 3366 | } else { |
f96637be | 3367 | cifs_dbg(VFS, "No username specified\n"); |
50c2f753 SF |
3368 | /* In userspace mount helper we can get user name from alternate |
3369 | locations such as env variables and files on disk */ | |
04db79b0 | 3370 | return -EINVAL; |
1da177e4 LT |
3371 | } |
3372 | ||
1da177e4 | 3373 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 3374 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
3375 | /* load_nls_default cannot return null */ |
3376 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 3377 | } else { |
a5fc4ce0 JL |
3378 | volume_info->local_nls = load_nls(volume_info->iocharset); |
3379 | if (volume_info->local_nls == NULL) { | |
f96637be | 3380 | cifs_dbg(VFS, "CIFS mount error: iocharset %s not found\n", |
b6b38f70 | 3381 | volume_info->iocharset); |
04db79b0 | 3382 | return -ELIBACC; |
1da177e4 LT |
3383 | } |
3384 | } | |
724d9f1c | 3385 | |
724d9f1c PS |
3386 | return rc; |
3387 | } | |
3388 | ||
04db79b0 JL |
3389 | struct smb_vol * |
3390 | cifs_get_volume_info(char *mount_data, const char *devname) | |
3391 | { | |
3392 | int rc; | |
3393 | struct smb_vol *volume_info; | |
3394 | ||
6ee9542a | 3395 | volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL); |
04db79b0 JL |
3396 | if (!volume_info) |
3397 | return ERR_PTR(-ENOMEM); | |
3398 | ||
3399 | rc = cifs_setup_volume_info(volume_info, mount_data, devname); | |
3400 | if (rc) { | |
3401 | cifs_cleanup_volume_info(volume_info); | |
3402 | volume_info = ERR_PTR(rc); | |
3403 | } | |
3404 | ||
3405 | return volume_info; | |
3406 | } | |
3407 | ||
724d9f1c | 3408 | int |
2c6292ae | 3409 | cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) |
724d9f1c | 3410 | { |
1daaae8f | 3411 | int rc; |
6d5786a3 | 3412 | unsigned int xid; |
af4281dc | 3413 | struct cifs_ses *ses; |
96daf2b0 | 3414 | struct cifs_tcon *tcon; |
af4281dc | 3415 | struct TCP_Server_Info *server; |
724d9f1c PS |
3416 | char *full_path; |
3417 | struct tcon_link *tlink; | |
3418 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
3419 | int referral_walks_count = 0; | |
20547490 | 3420 | #endif |
dd854466 AV |
3421 | |
3422 | rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); | |
3423 | if (rc) | |
3424 | return rc; | |
3425 | ||
20547490 | 3426 | #ifdef CONFIG_CIFS_DFS_UPCALL |
724d9f1c PS |
3427 | try_mount_again: |
3428 | /* cleanup activities if we're chasing a referral */ | |
3429 | if (referral_walks_count) { | |
3430 | if (tcon) | |
3431 | cifs_put_tcon(tcon); | |
af4281dc PS |
3432 | else if (ses) |
3433 | cifs_put_smb_ses(ses); | |
724d9f1c | 3434 | |
6d5786a3 | 3435 | free_xid(xid); |
724d9f1c PS |
3436 | } |
3437 | #endif | |
1daaae8f | 3438 | rc = 0; |
724d9f1c | 3439 | tcon = NULL; |
af4281dc PS |
3440 | ses = NULL; |
3441 | server = NULL; | |
724d9f1c PS |
3442 | full_path = NULL; |
3443 | tlink = NULL; | |
3444 | ||
6d5786a3 | 3445 | xid = get_xid(); |
1da177e4 | 3446 | |
63c038c2 | 3447 | /* get a reference to a tcp session */ |
af4281dc PS |
3448 | server = cifs_get_tcp_session(volume_info); |
3449 | if (IS_ERR(server)) { | |
3450 | rc = PTR_ERR(server); | |
dd854466 | 3451 | bdi_destroy(&cifs_sb->bdi); |
63c038c2 | 3452 | goto out; |
1da177e4 LT |
3453 | } |
3454 | ||
36988c76 | 3455 | /* get a reference to a SMB session */ |
af4281dc PS |
3456 | ses = cifs_get_smb_ses(server, volume_info); |
3457 | if (IS_ERR(ses)) { | |
3458 | rc = PTR_ERR(ses); | |
3459 | ses = NULL; | |
36988c76 | 3460 | goto mount_fail_check; |
1da177e4 | 3461 | } |
50c2f753 | 3462 | |
d00c28de | 3463 | /* search for existing tcon to this server share */ |
af4281dc | 3464 | tcon = cifs_get_tcon(ses, volume_info); |
d00c28de JL |
3465 | if (IS_ERR(tcon)) { |
3466 | rc = PTR_ERR(tcon); | |
3467 | tcon = NULL; | |
1bfe73c2 | 3468 | goto remote_path_check; |
d00c28de | 3469 | } |
1bfe73c2 | 3470 | |
d82c2df5 | 3471 | /* tell server which Unix caps we support */ |
29e20f9c | 3472 | if (cap_unix(tcon->ses)) { |
d82c2df5 SF |
3473 | /* reset of caps checks mount to see if unix extensions |
3474 | disabled for just this mount */ | |
2c6292ae | 3475 | reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info); |
6848b733 SF |
3476 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && |
3477 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & | |
3478 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) { | |
3479 | rc = -EACCES; | |
3480 | goto mount_fail_check; | |
3481 | } | |
3482 | } else | |
d82c2df5 | 3483 | tcon->unix_ext = 0; /* server does not support them */ |
c18c842b | 3484 | |
af4281dc PS |
3485 | /* do not care if a following call succeed - informational */ |
3486 | if (!tcon->ipc && server->ops->qfs_tcon) | |
3487 | server->ops->qfs_tcon(xid, tcon); | |
6848b733 | 3488 | |
24985c53 PS |
3489 | cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info); |
3490 | cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info); | |
f7910cbd | 3491 | |
66bfaadc | 3492 | /* tune readahead according to rsize */ |
8f71465c | 3493 | cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE; |
f7910cbd | 3494 | |
1bfe73c2 | 3495 | remote_path_check: |
c1508ca2 SF |
3496 | #ifdef CONFIG_CIFS_DFS_UPCALL |
3497 | /* | |
3498 | * Perform an unconditional check for whether there are DFS | |
3499 | * referrals for this path without prefix, to provide support | |
3500 | * for DFS referrals from w2k8 servers which don't seem to respond | |
3501 | * with PATH_NOT_COVERED to requests that include the prefix. | |
3502 | * Chase the referral if found, otherwise continue normally. | |
3503 | */ | |
3504 | if (referral_walks_count == 0) { | |
af4281dc PS |
3505 | int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, |
3506 | false); | |
c1508ca2 SF |
3507 | if (!refrc) { |
3508 | referral_walks_count++; | |
3509 | goto try_mount_again; | |
3510 | } | |
3511 | } | |
3512 | #endif | |
3513 | ||
f87d39d9 | 3514 | /* check if a whole path is not remote */ |
70945643 | 3515 | if (!rc && tcon) { |
68889f26 PS |
3516 | if (!server->ops->is_path_accessible) { |
3517 | rc = -ENOSYS; | |
3518 | goto mount_fail_check; | |
3519 | } | |
6d3ea7e4 SF |
3520 | /* |
3521 | * cifs_build_path_to_root works only when we have a valid tcon | |
3522 | */ | |
3523 | full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon); | |
e4cce94c IM |
3524 | if (full_path == NULL) { |
3525 | rc = -ENOMEM; | |
3526 | goto mount_fail_check; | |
3527 | } | |
68889f26 PS |
3528 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, |
3529 | full_path); | |
03ceace5 | 3530 | if (rc != 0 && rc != -EREMOTE) { |
e4cce94c IM |
3531 | kfree(full_path); |
3532 | goto mount_fail_check; | |
3533 | } | |
3534 | kfree(full_path); | |
3535 | } | |
3536 | ||
1bfe73c2 IM |
3537 | /* get referral if needed */ |
3538 | if (rc == -EREMOTE) { | |
d036f50f | 3539 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
3540 | if (referral_walks_count > MAX_NESTED_LINKS) { |
3541 | /* | |
3542 | * BB: when we implement proper loop detection, | |
3543 | * we will remove this check. But now we need it | |
3544 | * to prevent an indefinite loop if 'DFS tree' is | |
3545 | * misconfigured (i.e. has loops). | |
3546 | */ | |
3547 | rc = -ELOOP; | |
3548 | goto mount_fail_check; | |
3549 | } | |
1bfe73c2 | 3550 | |
af4281dc | 3551 | rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true); |
7b91e266 | 3552 | |
dd613945 | 3553 | if (!rc) { |
5c2503a8 | 3554 | referral_walks_count++; |
1bfe73c2 IM |
3555 | goto try_mount_again; |
3556 | } | |
dd613945 | 3557 | goto mount_fail_check; |
d036f50f SF |
3558 | #else /* No DFS support, return error on mount */ |
3559 | rc = -EOPNOTSUPP; | |
3560 | #endif | |
1bfe73c2 IM |
3561 | } |
3562 | ||
9d002df4 JL |
3563 | if (rc) |
3564 | goto mount_fail_check; | |
3565 | ||
3566 | /* now, hang the tcon off of the superblock */ | |
3567 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); | |
3568 | if (tlink == NULL) { | |
3569 | rc = -ENOMEM; | |
3570 | goto mount_fail_check; | |
3571 | } | |
3572 | ||
af4281dc | 3573 | tlink->tl_uid = ses->linux_uid; |
9d002df4 JL |
3574 | tlink->tl_tcon = tcon; |
3575 | tlink->tl_time = jiffies; | |
3576 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
3577 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3578 | ||
b647c35f | 3579 | cifs_sb->master_tlink = tlink; |
9d002df4 | 3580 | spin_lock(&cifs_sb->tlink_tree_lock); |
b647c35f | 3581 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
9d002df4 | 3582 | spin_unlock(&cifs_sb->tlink_tree_lock); |
413e661c | 3583 | |
da472fc8 | 3584 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
3585 | TLINK_IDLE_EXPIRE); |
3586 | ||
1bfe73c2 IM |
3587 | mount_fail_check: |
3588 | /* on error free sesinfo and tcon struct if needed */ | |
3589 | if (rc) { | |
1bfe73c2 | 3590 | /* If find_unc succeeded then rc == 0 so we can not end */ |
25985edc | 3591 | /* up accidentally freeing someone elses tcon struct */ |
1bfe73c2 IM |
3592 | if (tcon) |
3593 | cifs_put_tcon(tcon); | |
af4281dc PS |
3594 | else if (ses) |
3595 | cifs_put_smb_ses(ses); | |
1bfe73c2 | 3596 | else |
af4281dc | 3597 | cifs_put_tcp_session(server); |
dd854466 | 3598 | bdi_destroy(&cifs_sb->bdi); |
1bfe73c2 IM |
3599 | } |
3600 | ||
70fe7dc0 | 3601 | out: |
6d5786a3 | 3602 | free_xid(xid); |
1da177e4 LT |
3603 | return rc; |
3604 | } | |
3605 | ||
8d1bca32 JL |
3606 | /* |
3607 | * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon | |
3608 | * pointer may be NULL. | |
3609 | */ | |
1da177e4 | 3610 | int |
2e6e02ab | 3611 | CIFSTCon(const unsigned int xid, struct cifs_ses *ses, |
96daf2b0 | 3612 | const char *tree, struct cifs_tcon *tcon, |
1da177e4 LT |
3613 | const struct nls_table *nls_codepage) |
3614 | { | |
3615 | struct smb_hdr *smb_buffer; | |
3616 | struct smb_hdr *smb_buffer_response; | |
3617 | TCONX_REQ *pSMB; | |
3618 | TCONX_RSP *pSMBr; | |
3619 | unsigned char *bcc_ptr; | |
3620 | int rc = 0; | |
690c522f JL |
3621 | int length; |
3622 | __u16 bytes_left, count; | |
1da177e4 LT |
3623 | |
3624 | if (ses == NULL) | |
3625 | return -EIO; | |
3626 | ||
3627 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 3628 | if (smb_buffer == NULL) |
1da177e4 | 3629 | return -ENOMEM; |
ca43e3be | 3630 | |
1da177e4 LT |
3631 | smb_buffer_response = smb_buffer; |
3632 | ||
3633 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
3634 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 | 3635 | |
88257360 | 3636 | smb_buffer->Mid = get_next_mid(ses->server); |
1da177e4 LT |
3637 | smb_buffer->Uid = ses->Suid; |
3638 | pSMB = (TCONX_REQ *) smb_buffer; | |
3639 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
3640 | ||
3641 | pSMB->AndXCommand = 0xFF; | |
3642 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 3643 | bcc_ptr = &pSMB->Password[0]; |
8d1bca32 | 3644 | if (!tcon || (ses->server->sec_mode & SECMODE_USER)) { |
eeac8047 | 3645 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 3646 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 3647 | bcc_ptr++; /* skip password */ |
7c7b25bc | 3648 | /* already aligned so no need to do it below */ |
eeac8047 | 3649 | } else { |
540b2e37 | 3650 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
3651 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
3652 | specified as required (when that support is added to | |
3653 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 3654 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
3655 | by Samba (not sure whether other servers allow |
3656 | NTLMv2 password here) */ | |
7c7b25bc | 3657 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 3658 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
00e485b0 | 3659 | (ses->server->secType == LANMAN)) |
d3ba50b1 | 3660 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
96daf2b0 | 3661 | ses->server->sec_mode & |
4e53a3fb JL |
3662 | SECMODE_PW_ENCRYPT ? true : false, |
3663 | bcc_ptr); | |
7c7b25bc SF |
3664 | else |
3665 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 | 3666 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
9ef5992e | 3667 | bcc_ptr, nls_codepage); |
eeac8047 | 3668 | |
540b2e37 | 3669 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 3670 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
3671 | /* must align unicode strings */ |
3672 | *bcc_ptr = 0; /* null byte password */ | |
3673 | bcc_ptr++; | |
3674 | } | |
eeac8047 | 3675 | } |
1da177e4 | 3676 | |
96daf2b0 | 3677 | if (ses->server->sec_mode & |
a878fb22 | 3678 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
1da177e4 LT |
3679 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
3680 | ||
3681 | if (ses->capabilities & CAP_STATUS32) { | |
3682 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
3683 | } | |
3684 | if (ses->capabilities & CAP_DFS) { | |
3685 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
3686 | } | |
3687 | if (ses->capabilities & CAP_UNICODE) { | |
3688 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
3689 | length = | |
acbbb76a | 3690 | cifs_strtoUTF16((__le16 *) bcc_ptr, tree, |
50c2f753 | 3691 | 6 /* max utf8 char length in bytes */ * |
a878fb22 SF |
3692 | (/* server len*/ + 256 /* share len */), nls_codepage); |
3693 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
3694 | bcc_ptr += 2; /* skip trailing null */ |
3695 | } else { /* ASCII */ | |
1da177e4 LT |
3696 | strcpy(bcc_ptr, tree); |
3697 | bcc_ptr += strlen(tree) + 1; | |
3698 | } | |
3699 | strcpy(bcc_ptr, "?????"); | |
3700 | bcc_ptr += strlen("?????"); | |
3701 | bcc_ptr += 1; | |
3702 | count = bcc_ptr - &pSMB->Password[0]; | |
be8e3b00 SF |
3703 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
3704 | pSMB->hdr.smb_buf_length) + count); | |
1da177e4 LT |
3705 | pSMB->ByteCount = cpu_to_le16(count); |
3706 | ||
133672ef | 3707 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 3708 | 0); |
1da177e4 | 3709 | |
1da177e4 LT |
3710 | /* above now done in SendReceive */ |
3711 | if ((rc == 0) && (tcon != NULL)) { | |
0e0d2cf3 SF |
3712 | bool is_unicode; |
3713 | ||
1da177e4 | 3714 | tcon->tidStatus = CifsGood; |
3b795210 | 3715 | tcon->need_reconnect = false; |
1da177e4 LT |
3716 | tcon->tid = smb_buffer_response->Tid; |
3717 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 3718 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 3719 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
3720 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
3721 | is_unicode = true; | |
3722 | else | |
3723 | is_unicode = false; | |
3724 | ||
cc20c031 | 3725 | |
50c2f753 | 3726 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
3727 | if (length == 3) { |
3728 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
3729 | (bcc_ptr[2] == 'C')) { | |
f96637be | 3730 | cifs_dbg(FYI, "IPC connection\n"); |
7f8ed420 SF |
3731 | tcon->ipc = 1; |
3732 | } | |
3733 | } else if (length == 2) { | |
3734 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
3735 | /* the most common case */ | |
f96637be | 3736 | cifs_dbg(FYI, "disk share connection\n"); |
7f8ed420 SF |
3737 | } |
3738 | } | |
50c2f753 | 3739 | bcc_ptr += length + 1; |
cc20c031 | 3740 | bytes_left -= (length + 1); |
1da177e4 | 3741 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); |
cc20c031 JL |
3742 | |
3743 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 3744 | kfree(tcon->nativeFileSystem); |
acbbb76a | 3745 | tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr, |
0e0d2cf3 | 3746 | bytes_left, is_unicode, |
cc20c031 JL |
3747 | nls_codepage); |
3748 | ||
f96637be | 3749 | cifs_dbg(FYI, "nativeFileSystem=%s\n", tcon->nativeFileSystem); |
cc20c031 | 3750 | |
fb8c4b14 | 3751 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
3752 | (smb_buffer_response->WordCount == 7)) |
3753 | /* field is in same location */ | |
3979877e SF |
3754 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
3755 | else | |
3756 | tcon->Flags = 0; | |
f96637be | 3757 | cifs_dbg(FYI, "Tcon flags: 0x%x\n", tcon->Flags); |
1da177e4 | 3758 | } else if ((rc == 0) && tcon == NULL) { |
50c2f753 | 3759 | /* all we need to save for IPC$ connection */ |
1da177e4 LT |
3760 | ses->ipc_tid = smb_buffer_response->Tid; |
3761 | } | |
3762 | ||
a8a11d39 | 3763 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
3764 | return rc; |
3765 | } | |
3766 | ||
2a9b9951 AV |
3767 | void |
3768 | cifs_umount(struct cifs_sb_info *cifs_sb) | |
1da177e4 | 3769 | { |
b647c35f JL |
3770 | struct rb_root *root = &cifs_sb->tlink_tree; |
3771 | struct rb_node *node; | |
3772 | struct tcon_link *tlink; | |
9d002df4 | 3773 | |
2de970ff JL |
3774 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
3775 | ||
b647c35f JL |
3776 | spin_lock(&cifs_sb->tlink_tree_lock); |
3777 | while ((node = rb_first(root))) { | |
3778 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3779 | cifs_get_tlink(tlink); | |
3780 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3781 | rb_erase(node, root); | |
1da177e4 | 3782 | |
b647c35f JL |
3783 | spin_unlock(&cifs_sb->tlink_tree_lock); |
3784 | cifs_put_tlink(tlink); | |
3785 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3786 | } | |
3787 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 3788 | |
dd854466 | 3789 | bdi_destroy(&cifs_sb->bdi); |
d757d71b AV |
3790 | kfree(cifs_sb->mountdata); |
3791 | unload_nls(cifs_sb->local_nls); | |
3792 | kfree(cifs_sb); | |
50c2f753 | 3793 | } |
1da177e4 | 3794 | |
286170aa PS |
3795 | int |
3796 | cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses) | |
1da177e4 LT |
3797 | { |
3798 | int rc = 0; | |
198b5682 | 3799 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 3800 | |
286170aa PS |
3801 | if (!server->ops->need_neg || !server->ops->negotiate) |
3802 | return -ENOSYS; | |
3803 | ||
198b5682 | 3804 | /* only send once per connect */ |
286170aa | 3805 | if (!server->ops->need_neg(server)) |
198b5682 JL |
3806 | return 0; |
3807 | ||
45275789 | 3808 | set_credits(server, 1); |
286170aa PS |
3809 | |
3810 | rc = server->ops->negotiate(xid, ses); | |
198b5682 JL |
3811 | if (rc == 0) { |
3812 | spin_lock(&GlobalMid_Lock); | |
7fdbaa1b | 3813 | if (server->tcpStatus == CifsNeedNegotiate) |
198b5682 JL |
3814 | server->tcpStatus = CifsGood; |
3815 | else | |
3816 | rc = -EHOSTDOWN; | |
3817 | spin_unlock(&GlobalMid_Lock); | |
198b5682 JL |
3818 | } |
3819 | ||
3820 | return rc; | |
3821 | } | |
3822 | ||
58c45c58 PS |
3823 | int |
3824 | cifs_setup_session(const unsigned int xid, struct cifs_ses *ses, | |
3825 | struct nls_table *nls_info) | |
198b5682 | 3826 | { |
58c45c58 | 3827 | int rc = -ENOSYS; |
198b5682 | 3828 | struct TCP_Server_Info *server = ses->server; |
26b994fa | 3829 | |
198b5682 JL |
3830 | ses->flags = 0; |
3831 | ses->capabilities = server->capabilities; | |
26b994fa | 3832 | if (linuxExtEnabled == 0) |
29e20f9c | 3833 | ses->capabilities &= (~server->vals->cap_unix); |
20418acd | 3834 | |
f96637be | 3835 | cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n", |
96daf2b0 | 3836 | server->sec_mode, server->capabilities, server->timeAdj); |
cb7691b6 | 3837 | |
58c45c58 PS |
3838 | if (server->ops->sess_setup) |
3839 | rc = server->ops->sess_setup(xid, ses, nls_info); | |
3840 | ||
26b994fa | 3841 | if (rc) { |
f96637be | 3842 | cifs_dbg(VFS, "Send error in SessSetup = %d\n", rc); |
26b994fa | 3843 | } else { |
b13ce4bb | 3844 | mutex_lock(&server->srv_mutex); |
5d0d2882 | 3845 | if (!server->session_estab) { |
21e73393 | 3846 | server->session_key.response = ses->auth_key.response; |
5d0d2882 | 3847 | server->session_key.len = ses->auth_key.len; |
21e73393 SP |
3848 | server->sequence_number = 0x2; |
3849 | server->session_estab = true; | |
3850 | ses->auth_key.response = NULL; | |
5d0d2882 SP |
3851 | } |
3852 | mutex_unlock(&server->srv_mutex); | |
3853 | ||
f96637be | 3854 | cifs_dbg(FYI, "CIFS Session Established successfully\n"); |
20418acd | 3855 | spin_lock(&GlobalMid_Lock); |
198b5682 JL |
3856 | ses->status = CifsGood; |
3857 | ses->need_reconnect = false; | |
20418acd | 3858 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 3859 | } |
26b994fa | 3860 | |
21e73393 SP |
3861 | kfree(ses->auth_key.response); |
3862 | ses->auth_key.response = NULL; | |
3863 | ses->auth_key.len = 0; | |
d3686d54 SP |
3864 | kfree(ses->ntlmssp); |
3865 | ses->ntlmssp = NULL; | |
21e73393 | 3866 | |
1da177e4 LT |
3867 | return rc; |
3868 | } | |
3869 | ||
8a8798a5 JL |
3870 | static int |
3871 | cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses) | |
3872 | { | |
3873 | switch (ses->server->secType) { | |
3874 | case Kerberos: | |
3875 | vol->secFlg = CIFSSEC_MUST_KRB5; | |
3876 | return 0; | |
3877 | case NTLMv2: | |
3878 | vol->secFlg = CIFSSEC_MUST_NTLMV2; | |
3879 | break; | |
3880 | case NTLM: | |
3881 | vol->secFlg = CIFSSEC_MUST_NTLM; | |
3882 | break; | |
3883 | case RawNTLMSSP: | |
3884 | vol->secFlg = CIFSSEC_MUST_NTLMSSP; | |
3885 | break; | |
3886 | case LANMAN: | |
3887 | vol->secFlg = CIFSSEC_MUST_LANMAN; | |
3888 | break; | |
3889 | } | |
3890 | ||
3891 | return cifs_set_cifscreds(vol, ses); | |
3892 | } | |
3893 | ||
96daf2b0 | 3894 | static struct cifs_tcon * |
6d4a0832 | 3895 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid) |
9d002df4 | 3896 | { |
8a8798a5 | 3897 | int rc; |
96daf2b0 SF |
3898 | struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); |
3899 | struct cifs_ses *ses; | |
3900 | struct cifs_tcon *tcon = NULL; | |
9d002df4 | 3901 | struct smb_vol *vol_info; |
9d002df4 JL |
3902 | |
3903 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
803ab977 DC |
3904 | if (vol_info == NULL) |
3905 | return ERR_PTR(-ENOMEM); | |
9d002df4 | 3906 | |
9d002df4 JL |
3907 | vol_info->local_nls = cifs_sb->local_nls; |
3908 | vol_info->linux_uid = fsuid; | |
3909 | vol_info->cred_uid = fsuid; | |
3910 | vol_info->UNC = master_tcon->treeName; | |
3911 | vol_info->retry = master_tcon->retry; | |
3912 | vol_info->nocase = master_tcon->nocase; | |
3913 | vol_info->local_lease = master_tcon->local_lease; | |
3914 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
3915 | ||
8a8798a5 JL |
3916 | rc = cifs_set_vol_auth(vol_info, master_tcon->ses); |
3917 | if (rc) { | |
3918 | tcon = ERR_PTR(rc); | |
3919 | goto out; | |
3920 | } | |
9d002df4 JL |
3921 | |
3922 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 3923 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 3924 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 3925 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
3926 | |
3927 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
3928 | if (IS_ERR(ses)) { | |
96daf2b0 | 3929 | tcon = (struct cifs_tcon *)ses; |
9d002df4 JL |
3930 | cifs_put_tcp_session(master_tcon->ses->server); |
3931 | goto out; | |
3932 | } | |
3933 | ||
3934 | tcon = cifs_get_tcon(ses, vol_info); | |
3935 | if (IS_ERR(tcon)) { | |
3936 | cifs_put_smb_ses(ses); | |
3937 | goto out; | |
3938 | } | |
3939 | ||
29e20f9c | 3940 | if (cap_unix(ses)) |
9d002df4 JL |
3941 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); |
3942 | out: | |
8a8798a5 JL |
3943 | kfree(vol_info->username); |
3944 | kfree(vol_info->password); | |
9d002df4 JL |
3945 | kfree(vol_info); |
3946 | ||
3947 | return tcon; | |
3948 | } | |
3949 | ||
96daf2b0 | 3950 | struct cifs_tcon * |
9d002df4 JL |
3951 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) |
3952 | { | |
3953 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
3954 | } | |
3955 | ||
3956 | static int | |
3957 | cifs_sb_tcon_pending_wait(void *unused) | |
3958 | { | |
3959 | schedule(); | |
3960 | return signal_pending(current) ? -ERESTARTSYS : 0; | |
3961 | } | |
3962 | ||
b647c35f JL |
3963 | /* find and return a tlink with given uid */ |
3964 | static struct tcon_link * | |
6d4a0832 | 3965 | tlink_rb_search(struct rb_root *root, kuid_t uid) |
b647c35f JL |
3966 | { |
3967 | struct rb_node *node = root->rb_node; | |
3968 | struct tcon_link *tlink; | |
3969 | ||
3970 | while (node) { | |
3971 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3972 | ||
6d4a0832 | 3973 | if (uid_gt(tlink->tl_uid, uid)) |
b647c35f | 3974 | node = node->rb_left; |
6d4a0832 | 3975 | else if (uid_lt(tlink->tl_uid, uid)) |
b647c35f JL |
3976 | node = node->rb_right; |
3977 | else | |
3978 | return tlink; | |
3979 | } | |
3980 | return NULL; | |
3981 | } | |
3982 | ||
3983 | /* insert a tcon_link into the tree */ | |
3984 | static void | |
3985 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
3986 | { | |
3987 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
3988 | struct tcon_link *tlink; | |
3989 | ||
3990 | while (*new) { | |
3991 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
3992 | parent = *new; | |
3993 | ||
6d4a0832 | 3994 | if (uid_gt(tlink->tl_uid, new_tlink->tl_uid)) |
b647c35f JL |
3995 | new = &((*new)->rb_left); |
3996 | else | |
3997 | new = &((*new)->rb_right); | |
3998 | } | |
3999 | ||
4000 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
4001 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
4002 | } | |
4003 | ||
9d002df4 JL |
4004 | /* |
4005 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
4006 | * current task. | |
4007 | * | |
4008 | * If the superblock doesn't refer to a multiuser mount, then just return | |
4009 | * the master tcon for the mount. | |
4010 | * | |
6ef933a3 | 4011 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
4012 | * exists, then check to see if it's pending construction. If it is then wait |
4013 | * for construction to complete. Once it's no longer pending, check to see if | |
4014 | * it failed and either return an error or retry construction, depending on | |
4015 | * the timeout. | |
4016 | * | |
4017 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
4018 | * try to construct a new one. | |
4019 | */ | |
4020 | struct tcon_link * | |
4021 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
4022 | { | |
4023 | int ret; | |
6d4a0832 | 4024 | kuid_t fsuid = current_fsuid(); |
9d002df4 JL |
4025 | struct tcon_link *tlink, *newtlink; |
4026 | ||
4027 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
4028 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
4029 | ||
4030 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 4031 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4032 | if (tlink) |
4033 | cifs_get_tlink(tlink); | |
4034 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4035 | ||
4036 | if (tlink == NULL) { | |
4037 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
4038 | if (newtlink == NULL) | |
4039 | return ERR_PTR(-ENOMEM); | |
b647c35f | 4040 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
4041 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
4042 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
4043 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
4044 | cifs_get_tlink(newtlink); | |
4045 | ||
9d002df4 JL |
4046 | spin_lock(&cifs_sb->tlink_tree_lock); |
4047 | /* was one inserted after previous search? */ | |
b647c35f | 4048 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4049 | if (tlink) { |
4050 | cifs_get_tlink(tlink); | |
4051 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4052 | kfree(newtlink); |
4053 | goto wait_for_construction; | |
4054 | } | |
9d002df4 | 4055 | tlink = newtlink; |
b647c35f JL |
4056 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
4057 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4058 | } else { |
4059 | wait_for_construction: | |
4060 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
4061 | cifs_sb_tcon_pending_wait, | |
4062 | TASK_INTERRUPTIBLE); | |
4063 | if (ret) { | |
4064 | cifs_put_tlink(tlink); | |
4065 | return ERR_PTR(ret); | |
4066 | } | |
4067 | ||
4068 | /* if it's good, return it */ | |
4069 | if (!IS_ERR(tlink->tl_tcon)) | |
4070 | return tlink; | |
4071 | ||
4072 | /* return error if we tried this already recently */ | |
4073 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
4074 | cifs_put_tlink(tlink); | |
4075 | return ERR_PTR(-EACCES); | |
4076 | } | |
4077 | ||
4078 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
4079 | goto wait_for_construction; | |
4080 | } | |
4081 | ||
4082 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
4083 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
4084 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
4085 | ||
4086 | if (IS_ERR(tlink->tl_tcon)) { | |
4087 | cifs_put_tlink(tlink); | |
4088 | return ERR_PTR(-EACCES); | |
4089 | } | |
4090 | ||
4091 | return tlink; | |
4092 | } | |
2de970ff JL |
4093 | |
4094 | /* | |
4095 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
4096 | * out tcons. | |
4097 | */ | |
4098 | static void | |
4099 | cifs_prune_tlinks(struct work_struct *work) | |
4100 | { | |
4101 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
4102 | prune_tlinks.work); | |
b647c35f JL |
4103 | struct rb_root *root = &cifs_sb->tlink_tree; |
4104 | struct rb_node *node = rb_first(root); | |
4105 | struct rb_node *tmp; | |
4106 | struct tcon_link *tlink; | |
2de970ff | 4107 | |
b647c35f JL |
4108 | /* |
4109 | * Because we drop the spinlock in the loop in order to put the tlink | |
4110 | * it's not guarded against removal of links from the tree. The only | |
4111 | * places that remove entries from the tree are this function and | |
4112 | * umounts. Because this function is non-reentrant and is canceled | |
4113 | * before umount can proceed, this is safe. | |
4114 | */ | |
4115 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4116 | node = rb_first(root); | |
4117 | while (node != NULL) { | |
4118 | tmp = node; | |
4119 | node = rb_next(tmp); | |
4120 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
4121 | ||
4122 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
4123 | atomic_read(&tlink->tl_count) != 0 || | |
4124 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
4125 | continue; | |
2de970ff | 4126 | |
b647c35f JL |
4127 | cifs_get_tlink(tlink); |
4128 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4129 | rb_erase(tmp, root); | |
4130 | ||
4131 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4132 | cifs_put_tlink(tlink); | |
4133 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4134 | } | |
4135 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff | 4136 | |
da472fc8 | 4137 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
4138 | TLINK_IDLE_EXPIRE); |
4139 | } |