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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, | |
2baa2682 | 73 | Opt_mapposix, Opt_nomapposix, |
8830d7e0 SP |
74 | Opt_mapchars, Opt_nomapchars, Opt_sfu, |
75 | Opt_nosfu, Opt_nodfs, Opt_posixpaths, | |
76 | Opt_noposixpaths, Opt_nounix, | |
77 | Opt_nocase, | |
78 | Opt_brl, Opt_nobrl, | |
79 | Opt_forcemandatorylock, Opt_setuids, | |
80 | Opt_nosetuids, Opt_dynperm, Opt_nodynperm, | |
81 | Opt_nohard, Opt_nosoft, | |
82 | Opt_nointr, Opt_intr, | |
83 | Opt_nostrictsync, Opt_strictsync, | |
84 | Opt_serverino, Opt_noserverino, | |
85 | Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl, | |
86 | Opt_acl, Opt_noacl, Opt_locallease, | |
1b359204 | 87 | Opt_sign, Opt_seal, Opt_noac, |
8830d7e0 | 88 | Opt_fsc, Opt_mfsymlinks, |
a0b3df5c | 89 | Opt_multiuser, Opt_sloppy, Opt_nosharesock, |
b2a30774 | 90 | Opt_persistent, Opt_nopersistent, |
592fafe6 | 91 | Opt_resilient, Opt_noresilient, |
8830d7e0 SP |
92 | |
93 | /* Mount options which take numeric value */ | |
94 | Opt_backupuid, Opt_backupgid, Opt_uid, | |
95 | Opt_cruid, Opt_gid, Opt_file_mode, | |
96 | Opt_dirmode, Opt_port, | |
97 | Opt_rsize, Opt_wsize, Opt_actimeo, | |
adfeb3e0 | 98 | Opt_echo_interval, |
8830d7e0 SP |
99 | |
100 | /* Mount options which take string value */ | |
101 | Opt_user, Opt_pass, Opt_ip, | |
73a999fa | 102 | Opt_domain, Opt_srcaddr, Opt_iocharset, |
8830d7e0 | 103 | Opt_netbiosname, Opt_servern, |
23db65f5 | 104 | Opt_ver, Opt_vers, Opt_sec, Opt_cache, |
8830d7e0 SP |
105 | |
106 | /* Mount options to be ignored */ | |
107 | Opt_ignore, | |
108 | ||
109 | /* Options which could be blank */ | |
110 | Opt_blank_pass, | |
4fe9e963 SP |
111 | Opt_blank_user, |
112 | Opt_blank_ip, | |
8830d7e0 SP |
113 | |
114 | Opt_err | |
115 | }; | |
116 | ||
117 | static const match_table_t cifs_mount_option_tokens = { | |
118 | ||
119 | { Opt_user_xattr, "user_xattr" }, | |
120 | { Opt_nouser_xattr, "nouser_xattr" }, | |
121 | { Opt_forceuid, "forceuid" }, | |
122 | { Opt_noforceuid, "noforceuid" }, | |
72bd481f JL |
123 | { Opt_forcegid, "forcegid" }, |
124 | { Opt_noforcegid, "noforcegid" }, | |
8830d7e0 SP |
125 | { Opt_noblocksend, "noblocksend" }, |
126 | { Opt_noautotune, "noautotune" }, | |
127 | { Opt_hard, "hard" }, | |
128 | { Opt_soft, "soft" }, | |
129 | { Opt_perm, "perm" }, | |
130 | { Opt_noperm, "noperm" }, | |
2baa2682 | 131 | { Opt_mapchars, "mapchars" }, /* SFU style */ |
8830d7e0 | 132 | { Opt_nomapchars, "nomapchars" }, |
2baa2682 SF |
133 | { Opt_mapposix, "mapposix" }, /* SFM style */ |
134 | { Opt_nomapposix, "nomapposix" }, | |
8830d7e0 SP |
135 | { Opt_sfu, "sfu" }, |
136 | { Opt_nosfu, "nosfu" }, | |
137 | { Opt_nodfs, "nodfs" }, | |
138 | { Opt_posixpaths, "posixpaths" }, | |
139 | { Opt_noposixpaths, "noposixpaths" }, | |
140 | { Opt_nounix, "nounix" }, | |
141 | { Opt_nounix, "nolinux" }, | |
142 | { Opt_nocase, "nocase" }, | |
143 | { Opt_nocase, "ignorecase" }, | |
144 | { Opt_brl, "brl" }, | |
145 | { Opt_nobrl, "nobrl" }, | |
146 | { Opt_nobrl, "nolock" }, | |
147 | { Opt_forcemandatorylock, "forcemandatorylock" }, | |
5cfdddcf | 148 | { Opt_forcemandatorylock, "forcemand" }, |
8830d7e0 SP |
149 | { Opt_setuids, "setuids" }, |
150 | { Opt_nosetuids, "nosetuids" }, | |
151 | { Opt_dynperm, "dynperm" }, | |
152 | { Opt_nodynperm, "nodynperm" }, | |
153 | { Opt_nohard, "nohard" }, | |
154 | { Opt_nosoft, "nosoft" }, | |
155 | { Opt_nointr, "nointr" }, | |
156 | { Opt_intr, "intr" }, | |
157 | { Opt_nostrictsync, "nostrictsync" }, | |
158 | { Opt_strictsync, "strictsync" }, | |
159 | { Opt_serverino, "serverino" }, | |
160 | { Opt_noserverino, "noserverino" }, | |
161 | { Opt_rwpidforward, "rwpidforward" }, | |
162 | { Opt_cifsacl, "cifsacl" }, | |
163 | { Opt_nocifsacl, "nocifsacl" }, | |
164 | { Opt_acl, "acl" }, | |
165 | { Opt_noacl, "noacl" }, | |
166 | { Opt_locallease, "locallease" }, | |
167 | { Opt_sign, "sign" }, | |
168 | { Opt_seal, "seal" }, | |
8830d7e0 SP |
169 | { Opt_noac, "noac" }, |
170 | { Opt_fsc, "fsc" }, | |
171 | { Opt_mfsymlinks, "mfsymlinks" }, | |
172 | { Opt_multiuser, "multiuser" }, | |
d8162558 | 173 | { Opt_sloppy, "sloppy" }, |
a0b3df5c | 174 | { Opt_nosharesock, "nosharesock" }, |
b2a30774 SF |
175 | { Opt_persistent, "persistenthandles"}, |
176 | { Opt_nopersistent, "nopersistenthandles"}, | |
592fafe6 SF |
177 | { Opt_resilient, "resilienthandles"}, |
178 | { Opt_noresilient, "noresilienthandles"}, | |
8830d7e0 SP |
179 | |
180 | { Opt_backupuid, "backupuid=%s" }, | |
181 | { Opt_backupgid, "backupgid=%s" }, | |
182 | { Opt_uid, "uid=%s" }, | |
183 | { Opt_cruid, "cruid=%s" }, | |
184 | { Opt_gid, "gid=%s" }, | |
185 | { Opt_file_mode, "file_mode=%s" }, | |
186 | { Opt_dirmode, "dirmode=%s" }, | |
187 | { Opt_dirmode, "dir_mode=%s" }, | |
188 | { Opt_port, "port=%s" }, | |
189 | { Opt_rsize, "rsize=%s" }, | |
190 | { Opt_wsize, "wsize=%s" }, | |
191 | { Opt_actimeo, "actimeo=%s" }, | |
adfeb3e0 | 192 | { Opt_echo_interval, "echo_interval=%s" }, |
8830d7e0 | 193 | |
4fe9e963 SP |
194 | { Opt_blank_user, "user=" }, |
195 | { Opt_blank_user, "username=" }, | |
8830d7e0 SP |
196 | { Opt_user, "user=%s" }, |
197 | { Opt_user, "username=%s" }, | |
198 | { Opt_blank_pass, "pass=" }, | |
3c15b4cf | 199 | { Opt_blank_pass, "password=" }, |
8830d7e0 SP |
200 | { Opt_pass, "pass=%s" }, |
201 | { Opt_pass, "password=%s" }, | |
4fe9e963 SP |
202 | { Opt_blank_ip, "ip=" }, |
203 | { Opt_blank_ip, "addr=" }, | |
8830d7e0 SP |
204 | { Opt_ip, "ip=%s" }, |
205 | { Opt_ip, "addr=%s" }, | |
73a999fa JL |
206 | { Opt_ignore, "unc=%s" }, |
207 | { Opt_ignore, "target=%s" }, | |
208 | { Opt_ignore, "path=%s" }, | |
8830d7e0 SP |
209 | { Opt_domain, "dom=%s" }, |
210 | { Opt_domain, "domain=%s" }, | |
211 | { Opt_domain, "workgroup=%s" }, | |
212 | { Opt_srcaddr, "srcaddr=%s" }, | |
73a999fa | 213 | { Opt_ignore, "prefixpath=%s" }, |
8830d7e0 | 214 | { Opt_iocharset, "iocharset=%s" }, |
8830d7e0 SP |
215 | { Opt_netbiosname, "netbiosname=%s" }, |
216 | { Opt_servern, "servern=%s" }, | |
217 | { Opt_ver, "ver=%s" }, | |
23db65f5 | 218 | { Opt_vers, "vers=%s" }, |
8830d7e0 | 219 | { Opt_sec, "sec=%s" }, |
15b6a473 | 220 | { Opt_cache, "cache=%s" }, |
8830d7e0 SP |
221 | |
222 | { Opt_ignore, "cred" }, | |
223 | { Opt_ignore, "credentials" }, | |
a557b976 JL |
224 | { Opt_ignore, "cred=%s" }, |
225 | { Opt_ignore, "credentials=%s" }, | |
8830d7e0 SP |
226 | { Opt_ignore, "guest" }, |
227 | { Opt_ignore, "rw" }, | |
228 | { Opt_ignore, "ro" }, | |
229 | { Opt_ignore, "suid" }, | |
230 | { Opt_ignore, "nosuid" }, | |
231 | { Opt_ignore, "exec" }, | |
232 | { Opt_ignore, "noexec" }, | |
233 | { Opt_ignore, "nodev" }, | |
234 | { Opt_ignore, "noauto" }, | |
235 | { Opt_ignore, "dev" }, | |
236 | { Opt_ignore, "mand" }, | |
237 | { Opt_ignore, "nomand" }, | |
238 | { Opt_ignore, "_netdev" }, | |
239 | ||
240 | { Opt_err, NULL } | |
241 | }; | |
242 | ||
243 | enum { | |
244 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
245 | Opt_sec_ntlmsspi, Opt_sec_ntlmssp, | |
7659624f JL |
246 | Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2, |
247 | Opt_sec_ntlmv2i, Opt_sec_lanman, | |
8830d7e0 SP |
248 | Opt_sec_none, |
249 | ||
250 | Opt_sec_err | |
251 | }; | |
252 | ||
253 | static const match_table_t cifs_secflavor_tokens = { | |
254 | { Opt_sec_krb5, "krb5" }, | |
255 | { Opt_sec_krb5i, "krb5i" }, | |
256 | { Opt_sec_krb5p, "krb5p" }, | |
257 | { Opt_sec_ntlmsspi, "ntlmsspi" }, | |
258 | { Opt_sec_ntlmssp, "ntlmssp" }, | |
259 | { Opt_ntlm, "ntlm" }, | |
260 | { Opt_sec_ntlmi, "ntlmi" }, | |
7659624f JL |
261 | { Opt_sec_ntlmv2, "nontlm" }, |
262 | { Opt_sec_ntlmv2, "ntlmv2" }, | |
8830d7e0 | 263 | { Opt_sec_ntlmv2i, "ntlmv2i" }, |
8830d7e0 SP |
264 | { Opt_sec_lanman, "lanman" }, |
265 | { Opt_sec_none, "none" }, | |
266 | ||
267 | { Opt_sec_err, NULL } | |
268 | }; | |
269 | ||
15b6a473 JL |
270 | /* cache flavors */ |
271 | enum { | |
272 | Opt_cache_loose, | |
273 | Opt_cache_strict, | |
274 | Opt_cache_none, | |
275 | Opt_cache_err | |
276 | }; | |
277 | ||
278 | static const match_table_t cifs_cacheflavor_tokens = { | |
279 | { Opt_cache_loose, "loose" }, | |
280 | { Opt_cache_strict, "strict" }, | |
281 | { Opt_cache_none, "none" }, | |
282 | { Opt_cache_err, NULL } | |
283 | }; | |
284 | ||
23db65f5 JL |
285 | static const match_table_t cifs_smb_version_tokens = { |
286 | { Smb_1, SMB1_VERSION_STRING }, | |
dd446b16 | 287 | { Smb_20, SMB20_VERSION_STRING}, |
1080ef75 | 288 | { Smb_21, SMB21_VERSION_STRING }, |
e4aa25e7 | 289 | { Smb_30, SMB30_VERSION_STRING }, |
20b6d8b4 | 290 | { Smb_302, SMB302_VERSION_STRING }, |
5f7fbf73 SF |
291 | #ifdef CONFIG_CIFS_SMB311 |
292 | { Smb_311, SMB311_VERSION_STRING }, | |
aab1893d | 293 | { Smb_311, ALT_SMB311_VERSION_STRING }, |
5f7fbf73 SF |
294 | #endif /* SMB311 */ |
295 | { Smb_version_err, NULL } | |
23db65f5 JL |
296 | }; |
297 | ||
a9f1b85e PS |
298 | static int ip_connect(struct TCP_Server_Info *server); |
299 | static int generic_ip_connect(struct TCP_Server_Info *server); | |
b647c35f | 300 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
2de970ff | 301 | static void cifs_prune_tlinks(struct work_struct *work); |
b9bce2e9 JL |
302 | static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
303 | const char *devname); | |
1da177e4 | 304 | |
d5c5605c JL |
305 | /* |
306 | * cifs tcp session reconnection | |
307 | * | |
308 | * mark tcp session as reconnecting so temporarily locked | |
309 | * mark all smb sessions as reconnecting for tcp session | |
310 | * reconnect tcp session | |
311 | * wake up waiters on reconnection? - (not needed currently) | |
312 | */ | |
28ea5290 | 313 | int |
1da177e4 LT |
314 | cifs_reconnect(struct TCP_Server_Info *server) |
315 | { | |
316 | int rc = 0; | |
f1987b44 | 317 | struct list_head *tmp, *tmp2; |
96daf2b0 SF |
318 | struct cifs_ses *ses; |
319 | struct cifs_tcon *tcon; | |
fb8c4b14 | 320 | struct mid_q_entry *mid_entry; |
3c1105df | 321 | struct list_head retry_list; |
50c2f753 | 322 | |
1da177e4 | 323 | spin_lock(&GlobalMid_Lock); |
469ee614 | 324 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 325 | /* the demux thread will exit normally |
1da177e4 LT |
326 | next time through the loop */ |
327 | spin_unlock(&GlobalMid_Lock); | |
328 | return rc; | |
329 | } else | |
330 | server->tcpStatus = CifsNeedReconnect; | |
331 | spin_unlock(&GlobalMid_Lock); | |
332 | server->maxBuf = 0; | |
aa24d1e9 PS |
333 | #ifdef CONFIG_CIFS_SMB2 |
334 | server->max_read = 0; | |
335 | #endif | |
1da177e4 | 336 | |
f96637be | 337 | cifs_dbg(FYI, "Reconnecting tcp session\n"); |
1da177e4 LT |
338 | |
339 | /* before reconnecting the tcp session, mark the smb session (uid) | |
340 | and the tid bad so they are not used until reconnected */ | |
f96637be JP |
341 | cifs_dbg(FYI, "%s: marking sessions and tcons for reconnect\n", |
342 | __func__); | |
3f9bcca7 | 343 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 344 | list_for_each(tmp, &server->smb_ses_list) { |
96daf2b0 | 345 | ses = list_entry(tmp, struct cifs_ses, smb_ses_list); |
14fbf50d JL |
346 | ses->need_reconnect = true; |
347 | ses->ipc_tid = 0; | |
f1987b44 | 348 | list_for_each(tmp2, &ses->tcon_list) { |
96daf2b0 | 349 | tcon = list_entry(tmp2, struct cifs_tcon, tcon_list); |
3b795210 | 350 | tcon->need_reconnect = true; |
1da177e4 | 351 | } |
1da177e4 | 352 | } |
3f9bcca7 | 353 | spin_unlock(&cifs_tcp_ses_lock); |
2b84a36c | 354 | |
1da177e4 | 355 | /* do not want to be sending data on a socket we are freeing */ |
f96637be | 356 | cifs_dbg(FYI, "%s: tearing down socket\n", __func__); |
72ca545b | 357 | mutex_lock(&server->srv_mutex); |
fb8c4b14 | 358 | if (server->ssocket) { |
f96637be JP |
359 | cifs_dbg(FYI, "State: 0x%x Flags: 0x%lx\n", |
360 | server->ssocket->state, server->ssocket->flags); | |
91cf45f0 | 361 | kernel_sock_shutdown(server->ssocket, SHUT_WR); |
f96637be JP |
362 | cifs_dbg(FYI, "Post shutdown state: 0x%x Flags: 0x%lx\n", |
363 | server->ssocket->state, server->ssocket->flags); | |
1da177e4 LT |
364 | sock_release(server->ssocket); |
365 | server->ssocket = NULL; | |
366 | } | |
5d0d2882 SP |
367 | server->sequence_number = 0; |
368 | server->session_estab = false; | |
21e73393 SP |
369 | kfree(server->session_key.response); |
370 | server->session_key.response = NULL; | |
371 | server->session_key.len = 0; | |
fda35943 | 372 | server->lstrp = jiffies; |
1da177e4 | 373 | |
2b84a36c | 374 | /* mark submitted MIDs for retry and issue callback */ |
3c1105df | 375 | INIT_LIST_HEAD(&retry_list); |
f96637be | 376 | cifs_dbg(FYI, "%s: moving mids to private list\n", __func__); |
1da177e4 | 377 | spin_lock(&GlobalMid_Lock); |
2b84a36c JL |
378 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
379 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 PS |
380 | if (mid_entry->mid_state == MID_REQUEST_SUBMITTED) |
381 | mid_entry->mid_state = MID_RETRY_NEEDED; | |
3c1105df JL |
382 | list_move(&mid_entry->qhead, &retry_list); |
383 | } | |
384 | spin_unlock(&GlobalMid_Lock); | |
820962dc | 385 | mutex_unlock(&server->srv_mutex); |
3c1105df | 386 | |
f96637be | 387 | cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__); |
3c1105df JL |
388 | list_for_each_safe(tmp, tmp2, &retry_list) { |
389 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
2b84a36c JL |
390 | list_del_init(&mid_entry->qhead); |
391 | mid_entry->callback(mid_entry); | |
1da177e4 | 392 | } |
1da177e4 | 393 | |
7fdbaa1b | 394 | do { |
6c3d8909 | 395 | try_to_freeze(); |
a9f1b85e PS |
396 | |
397 | /* we should try only the port we connected to before */ | |
73e216a8 | 398 | mutex_lock(&server->srv_mutex); |
a9f1b85e | 399 | rc = generic_ip_connect(server); |
fb8c4b14 | 400 | if (rc) { |
f96637be | 401 | cifs_dbg(FYI, "reconnect error %d\n", rc); |
4afe260b | 402 | mutex_unlock(&server->srv_mutex); |
0cb766ae | 403 | msleep(3000); |
1da177e4 LT |
404 | } else { |
405 | atomic_inc(&tcpSesReconnectCount); | |
406 | spin_lock(&GlobalMid_Lock); | |
469ee614 | 407 | if (server->tcpStatus != CifsExiting) |
fd88ce93 | 408 | server->tcpStatus = CifsNeedNegotiate; |
fb8c4b14 | 409 | spin_unlock(&GlobalMid_Lock); |
4afe260b | 410 | mutex_unlock(&server->srv_mutex); |
1da177e4 | 411 | } |
7fdbaa1b | 412 | } while (server->tcpStatus == CifsNeedReconnect); |
2b84a36c | 413 | |
1da177e4 LT |
414 | return rc; |
415 | } | |
416 | ||
c74093b6 JL |
417 | static void |
418 | cifs_echo_request(struct work_struct *work) | |
419 | { | |
420 | int rc; | |
421 | struct TCP_Server_Info *server = container_of(work, | |
422 | struct TCP_Server_Info, echo.work); | |
adfeb3e0 | 423 | unsigned long echo_interval = server->echo_interval; |
c74093b6 | 424 | |
247ec9b4 | 425 | /* |
f6d76178 PS |
426 | * We cannot send an echo if it is disabled or until the |
427 | * NEGOTIATE_PROTOCOL request is done, which is indicated by | |
428 | * server->ops->need_neg() == true. Also, no need to ping if | |
429 | * we got a response recently. | |
247ec9b4 | 430 | */ |
286170aa | 431 | if (!server->ops->need_neg || server->ops->need_neg(server) || |
f6d76178 | 432 | (server->ops->can_echo && !server->ops->can_echo(server)) || |
adfeb3e0 | 433 | time_before(jiffies, server->lstrp + echo_interval - HZ)) |
c74093b6 JL |
434 | goto requeue_echo; |
435 | ||
f6d76178 | 436 | rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS; |
c74093b6 | 437 | if (rc) |
f96637be JP |
438 | cifs_dbg(FYI, "Unable to send echo request to server: %s\n", |
439 | server->hostname); | |
c74093b6 JL |
440 | |
441 | requeue_echo: | |
adfeb3e0 | 442 | queue_delayed_work(cifsiod_wq, &server->echo, echo_interval); |
c74093b6 JL |
443 | } |
444 | ||
3d9c2472 | 445 | static bool |
2a37ef94 | 446 | allocate_buffers(struct TCP_Server_Info *server) |
3d9c2472 | 447 | { |
2a37ef94 JL |
448 | if (!server->bigbuf) { |
449 | server->bigbuf = (char *)cifs_buf_get(); | |
450 | if (!server->bigbuf) { | |
f96637be | 451 | cifs_dbg(VFS, "No memory for large SMB response\n"); |
3d9c2472 PS |
452 | msleep(3000); |
453 | /* retry will check if exiting */ | |
454 | return false; | |
455 | } | |
2a37ef94 | 456 | } else if (server->large_buf) { |
3d9c2472 | 457 | /* we are reusing a dirty large buf, clear its start */ |
1887f601 | 458 | memset(server->bigbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
459 | } |
460 | ||
2a37ef94 JL |
461 | if (!server->smallbuf) { |
462 | server->smallbuf = (char *)cifs_small_buf_get(); | |
463 | if (!server->smallbuf) { | |
f96637be | 464 | cifs_dbg(VFS, "No memory for SMB response\n"); |
3d9c2472 PS |
465 | msleep(1000); |
466 | /* retry will check if exiting */ | |
467 | return false; | |
468 | } | |
469 | /* beginning of smb buffer is cleared in our buf_get */ | |
470 | } else { | |
471 | /* if existing small buf clear beginning */ | |
1887f601 | 472 | memset(server->smallbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
473 | } |
474 | ||
3d9c2472 PS |
475 | return true; |
476 | } | |
477 | ||
ba749e6d JL |
478 | static bool |
479 | server_unresponsive(struct TCP_Server_Info *server) | |
480 | { | |
6dae51a5 PS |
481 | /* |
482 | * We need to wait 2 echo intervals to make sure we handle such | |
483 | * situations right: | |
484 | * 1s client sends a normal SMB request | |
485 | * 2s client gets a response | |
486 | * 30s echo workqueue job pops, and decides we got a response recently | |
487 | * and don't need to send another | |
488 | * ... | |
489 | * 65s kernel_recvmsg times out, and we see that we haven't gotten | |
490 | * a response in >60s. | |
491 | */ | |
492 | if (server->tcpStatus == CifsGood && | |
adfeb3e0 SF |
493 | time_after(jiffies, server->lstrp + 2 * server->echo_interval)) { |
494 | cifs_dbg(VFS, "Server %s has not responded in %lu seconds. Reconnecting...\n", | |
495 | server->hostname, (2 * server->echo_interval) / HZ); | |
ba749e6d JL |
496 | cifs_reconnect(server); |
497 | wake_up(&server->response_q); | |
498 | return true; | |
499 | } | |
500 | ||
501 | return false; | |
502 | } | |
503 | ||
e28bc5b1 JL |
504 | int |
505 | cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig, | |
506 | unsigned int nr_segs, unsigned int to_read) | |
e7015fb1 | 507 | { |
a52c1eb7 JL |
508 | int length = 0; |
509 | int total_read; | |
e831e6cf | 510 | struct msghdr smb_msg; |
e7015fb1 | 511 | |
e831e6cf JL |
512 | smb_msg.msg_control = NULL; |
513 | smb_msg.msg_controllen = 0; | |
09aab880 AV |
514 | iov_iter_kvec(&smb_msg.msg_iter, READ | ITER_KVEC, |
515 | iov_orig, nr_segs, to_read); | |
e831e6cf | 516 | |
09aab880 | 517 | for (total_read = 0; msg_data_left(&smb_msg); total_read += length) { |
95edcff4 JL |
518 | try_to_freeze(); |
519 | ||
ba749e6d | 520 | if (server_unresponsive(server)) { |
3fabaa27 | 521 | total_read = -ECONNABORTED; |
ba749e6d JL |
522 | break; |
523 | } | |
524 | ||
09aab880 | 525 | length = sock_recvmsg(server->ssocket, &smb_msg, 0); |
e7015fb1 | 526 | |
e7015fb1 | 527 | if (server->tcpStatus == CifsExiting) { |
a52c1eb7 | 528 | total_read = -ESHUTDOWN; |
e7015fb1 PS |
529 | break; |
530 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
531 | cifs_reconnect(server); | |
3fabaa27 | 532 | total_read = -ECONNABORTED; |
e7015fb1 PS |
533 | break; |
534 | } else if (length == -ERESTARTSYS || | |
535 | length == -EAGAIN || | |
536 | length == -EINTR) { | |
537 | /* | |
538 | * Minimum sleep to prevent looping, allowing socket | |
539 | * to clear and app threads to set tcpStatus | |
540 | * CifsNeedReconnect if server hung. | |
541 | */ | |
542 | usleep_range(1000, 2000); | |
543 | length = 0; | |
a52c1eb7 | 544 | continue; |
e7015fb1 | 545 | } else if (length <= 0) { |
09aab880 | 546 | cifs_dbg(FYI, "Received no data or error: %d\n", length); |
e7015fb1 | 547 | cifs_reconnect(server); |
3fabaa27 | 548 | total_read = -ECONNABORTED; |
e7015fb1 PS |
549 | break; |
550 | } | |
551 | } | |
a52c1eb7 | 552 | return total_read; |
e7015fb1 | 553 | } |
e7015fb1 | 554 | |
e28bc5b1 JL |
555 | int |
556 | cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, | |
557 | unsigned int to_read) | |
42c4dfc2 JL |
558 | { |
559 | struct kvec iov; | |
560 | ||
561 | iov.iov_base = buf; | |
562 | iov.iov_len = to_read; | |
563 | ||
e28bc5b1 | 564 | return cifs_readv_from_socket(server, &iov, 1, to_read); |
e7015fb1 PS |
565 | } |
566 | ||
98bac62c | 567 | static bool |
fe11e4cc | 568 | is_smb_response(struct TCP_Server_Info *server, unsigned char type) |
98bac62c | 569 | { |
98bac62c PS |
570 | /* |
571 | * The first byte big endian of the length field, | |
572 | * is actually not part of the length but the type | |
573 | * with the most common, zero, as regular data. | |
574 | */ | |
fe11e4cc JL |
575 | switch (type) { |
576 | case RFC1002_SESSION_MESSAGE: | |
577 | /* Regular SMB response */ | |
578 | return true; | |
579 | case RFC1002_SESSION_KEEP_ALIVE: | |
f96637be | 580 | cifs_dbg(FYI, "RFC 1002 session keep alive\n"); |
fe11e4cc JL |
581 | break; |
582 | case RFC1002_POSITIVE_SESSION_RESPONSE: | |
f96637be | 583 | cifs_dbg(FYI, "RFC 1002 positive session response\n"); |
fe11e4cc JL |
584 | break; |
585 | case RFC1002_NEGATIVE_SESSION_RESPONSE: | |
98bac62c PS |
586 | /* |
587 | * We get this from Windows 98 instead of an error on | |
588 | * SMB negprot response. | |
589 | */ | |
f96637be | 590 | cifs_dbg(FYI, "RFC 1002 negative session response\n"); |
98bac62c PS |
591 | /* give server a second to clean up */ |
592 | msleep(1000); | |
593 | /* | |
594 | * Always try 445 first on reconnect since we get NACK | |
595 | * on some if we ever connected to port 139 (the NACK | |
596 | * is since we do not begin with RFC1001 session | |
597 | * initialize frame). | |
598 | */ | |
fe11e4cc | 599 | cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT); |
98bac62c PS |
600 | cifs_reconnect(server); |
601 | wake_up(&server->response_q); | |
fe11e4cc JL |
602 | break; |
603 | default: | |
f96637be | 604 | cifs_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type); |
98bac62c | 605 | cifs_reconnect(server); |
98bac62c PS |
606 | } |
607 | ||
fe11e4cc | 608 | return false; |
98bac62c PS |
609 | } |
610 | ||
e28bc5b1 JL |
611 | void |
612 | dequeue_mid(struct mid_q_entry *mid, bool malformed) | |
ea1f4502 | 613 | { |
ad69bae1 | 614 | #ifdef CONFIG_CIFS_STATS2 |
ea1f4502 | 615 | mid->when_received = jiffies; |
ad69bae1 | 616 | #endif |
ea1f4502 JL |
617 | spin_lock(&GlobalMid_Lock); |
618 | if (!malformed) | |
7c9421e1 | 619 | mid->mid_state = MID_RESPONSE_RECEIVED; |
ea1f4502 | 620 | else |
7c9421e1 | 621 | mid->mid_state = MID_RESPONSE_MALFORMED; |
ea1f4502 | 622 | list_del_init(&mid->qhead); |
ad69bae1 | 623 | spin_unlock(&GlobalMid_Lock); |
ea1f4502 | 624 | } |
ad69bae1 | 625 | |
c8054ebd JL |
626 | static void |
627 | handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, | |
d4e4854f | 628 | char *buf, int malformed) |
ea1f4502 | 629 | { |
316cf94a PS |
630 | if (server->ops->check_trans2 && |
631 | server->ops->check_trans2(mid, server, buf, malformed)) | |
c8054ebd | 632 | return; |
ea1f4502 | 633 | mid->resp_buf = buf; |
7c9421e1 | 634 | mid->large_buf = server->large_buf; |
2a37ef94 JL |
635 | /* Was previous buf put in mpx struct for multi-rsp? */ |
636 | if (!mid->multiRsp) { | |
637 | /* smb buffer will be freed by user thread */ | |
638 | if (server->large_buf) | |
639 | server->bigbuf = NULL; | |
640 | else | |
641 | server->smallbuf = NULL; | |
642 | } | |
ffc00e27 | 643 | dequeue_mid(mid, malformed); |
ad69bae1 PS |
644 | } |
645 | ||
762dfd10 PS |
646 | static void clean_demultiplex_info(struct TCP_Server_Info *server) |
647 | { | |
648 | int length; | |
649 | ||
650 | /* take it off the list, if it's not already */ | |
651 | spin_lock(&cifs_tcp_ses_lock); | |
652 | list_del_init(&server->tcp_ses_list); | |
653 | spin_unlock(&cifs_tcp_ses_lock); | |
654 | ||
655 | spin_lock(&GlobalMid_Lock); | |
656 | server->tcpStatus = CifsExiting; | |
657 | spin_unlock(&GlobalMid_Lock); | |
658 | wake_up_all(&server->response_q); | |
659 | ||
2d86dbc9 | 660 | /* check if we have blocked requests that need to free */ |
fc40f9cf | 661 | spin_lock(&server->req_lock); |
2d86dbc9 PS |
662 | if (server->credits <= 0) |
663 | server->credits = 1; | |
fc40f9cf | 664 | spin_unlock(&server->req_lock); |
762dfd10 PS |
665 | /* |
666 | * Although there should not be any requests blocked on this queue it | |
667 | * can not hurt to be paranoid and try to wake up requests that may | |
668 | * haven been blocked when more than 50 at time were on the wire to the | |
669 | * same server - they now will see the session is in exit state and get | |
670 | * out of SendReceive. | |
671 | */ | |
672 | wake_up_all(&server->request_q); | |
673 | /* give those requests time to exit */ | |
674 | msleep(125); | |
675 | ||
676 | if (server->ssocket) { | |
677 | sock_release(server->ssocket); | |
678 | server->ssocket = NULL; | |
679 | } | |
680 | ||
681 | if (!list_empty(&server->pending_mid_q)) { | |
682 | struct list_head dispose_list; | |
683 | struct mid_q_entry *mid_entry; | |
684 | struct list_head *tmp, *tmp2; | |
685 | ||
686 | INIT_LIST_HEAD(&dispose_list); | |
687 | spin_lock(&GlobalMid_Lock); | |
688 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { | |
689 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
f96637be | 690 | cifs_dbg(FYI, "Clearing mid 0x%llx\n", mid_entry->mid); |
7c9421e1 | 691 | mid_entry->mid_state = MID_SHUTDOWN; |
762dfd10 PS |
692 | list_move(&mid_entry->qhead, &dispose_list); |
693 | } | |
694 | spin_unlock(&GlobalMid_Lock); | |
695 | ||
696 | /* now walk dispose list and issue callbacks */ | |
697 | list_for_each_safe(tmp, tmp2, &dispose_list) { | |
698 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
f96637be | 699 | cifs_dbg(FYI, "Callback mid 0x%llx\n", mid_entry->mid); |
762dfd10 PS |
700 | list_del_init(&mid_entry->qhead); |
701 | mid_entry->callback(mid_entry); | |
702 | } | |
703 | /* 1/8th of sec is more than enough time for them to exit */ | |
704 | msleep(125); | |
705 | } | |
706 | ||
707 | if (!list_empty(&server->pending_mid_q)) { | |
708 | /* | |
709 | * mpx threads have not exited yet give them at least the smb | |
710 | * send timeout time for long ops. | |
711 | * | |
712 | * Due to delays on oplock break requests, we need to wait at | |
713 | * least 45 seconds before giving up on a request getting a | |
714 | * response and going ahead and killing cifsd. | |
715 | */ | |
f96637be | 716 | cifs_dbg(FYI, "Wait for exit from demultiplex thread\n"); |
762dfd10 PS |
717 | msleep(46000); |
718 | /* | |
719 | * If threads still have not exited they are probably never | |
720 | * coming home not much else we can do but free the memory. | |
721 | */ | |
722 | } | |
723 | ||
724 | kfree(server->hostname); | |
725 | kfree(server); | |
726 | ||
727 | length = atomic_dec_return(&tcpSesAllocCount); | |
728 | if (length > 0) | |
11d83360 | 729 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv); |
762dfd10 PS |
730 | } |
731 | ||
e9097ab4 JL |
732 | static int |
733 | standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
734 | { | |
735 | int length; | |
736 | char *buf = server->smallbuf; | |
d4e4854f | 737 | unsigned int pdu_length = get_rfc1002_length(buf); |
e9097ab4 JL |
738 | |
739 | /* make sure this will fit in a large buffer */ | |
1887f601 | 740 | if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) { |
f96637be | 741 | cifs_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length); |
e9097ab4 JL |
742 | cifs_reconnect(server); |
743 | wake_up(&server->response_q); | |
3fabaa27 | 744 | return -ECONNABORTED; |
e9097ab4 JL |
745 | } |
746 | ||
747 | /* switch to large buffer if too big for a small one */ | |
748 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { | |
749 | server->large_buf = true; | |
d4e4854f | 750 | memcpy(server->bigbuf, buf, server->total_read); |
e9097ab4 | 751 | buf = server->bigbuf; |
e9097ab4 JL |
752 | } |
753 | ||
754 | /* now read the rest */ | |
1887f601 PS |
755 | length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, |
756 | pdu_length - HEADER_SIZE(server) + 1 + 4); | |
e9097ab4 JL |
757 | if (length < 0) |
758 | return length; | |
759 | server->total_read += length; | |
760 | ||
d4e4854f | 761 | dump_smb(buf, server->total_read); |
e9097ab4 JL |
762 | |
763 | /* | |
764 | * We know that we received enough to get to the MID as we | |
765 | * checked the pdu_length earlier. Now check to see | |
766 | * if the rest of the header is OK. We borrow the length | |
767 | * var for the rest of the loop to avoid a new stack var. | |
768 | * | |
769 | * 48 bytes is enough to display the header and a little bit | |
770 | * into the payload for debugging purposes. | |
771 | */ | |
373512ec | 772 | length = server->ops->check_message(buf, server->total_read, server); |
e9097ab4 JL |
773 | if (length != 0) |
774 | cifs_dump_mem("Bad SMB: ", buf, | |
775 | min_t(unsigned int, server->total_read, 48)); | |
776 | ||
2e44b288 PS |
777 | if (server->ops->is_status_pending && |
778 | server->ops->is_status_pending(buf, server, length)) | |
779 | return -1; | |
780 | ||
ff4fa4a2 JL |
781 | if (!mid) |
782 | return length; | |
e9097ab4 | 783 | |
d4e4854f | 784 | handle_mid(mid, server, buf, length); |
ff4fa4a2 | 785 | return 0; |
e9097ab4 JL |
786 | } |
787 | ||
1da177e4 | 788 | static int |
7c97c200 | 789 | cifs_demultiplex_thread(void *p) |
1da177e4 LT |
790 | { |
791 | int length; | |
7c97c200 | 792 | struct TCP_Server_Info *server = p; |
2a37ef94 JL |
793 | unsigned int pdu_length; |
794 | char *buf = NULL; | |
a5c3e1c7 | 795 | struct task_struct *task_to_wake = NULL; |
1da177e4 | 796 | struct mid_q_entry *mid_entry; |
1da177e4 | 797 | |
1da177e4 | 798 | current->flags |= PF_MEMALLOC; |
f96637be | 799 | cifs_dbg(FYI, "Demultiplex PID: %d\n", task_pid_nr(current)); |
93d0ec85 JL |
800 | |
801 | length = atomic_inc_return(&tcpSesAllocCount); | |
802 | if (length > 1) | |
11d83360 | 803 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv); |
1da177e4 | 804 | |
83144186 | 805 | set_freezable(); |
469ee614 | 806 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
807 | if (try_to_freeze()) |
808 | continue; | |
b8643e1b | 809 | |
2a37ef94 | 810 | if (!allocate_buffers(server)) |
3d9c2472 | 811 | continue; |
b8643e1b | 812 | |
2a37ef94 | 813 | server->large_buf = false; |
2a37ef94 | 814 | buf = server->smallbuf; |
f01d5e14 | 815 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 816 | |
e28bc5b1 | 817 | length = cifs_read_from_socket(server, buf, pdu_length); |
a52c1eb7 | 818 | if (length < 0) |
1da177e4 | 819 | continue; |
2a37ef94 | 820 | server->total_read = length; |
1da177e4 | 821 | |
98bac62c PS |
822 | /* |
823 | * The right amount was read from socket - 4 bytes, | |
824 | * so we can now interpret the length field. | |
825 | */ | |
d4e4854f | 826 | pdu_length = get_rfc1002_length(buf); |
70ca734a | 827 | |
f96637be | 828 | cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length); |
fe11e4cc | 829 | if (!is_smb_response(server, buf[0])) |
fb8c4b14 | 830 | continue; |
e4eb295d | 831 | |
89482a56 | 832 | /* make sure we have enough to get to the MID */ |
1887f601 | 833 | if (pdu_length < HEADER_SIZE(server) - 1 - 4) { |
f96637be JP |
834 | cifs_dbg(VFS, "SMB response too short (%u bytes)\n", |
835 | pdu_length); | |
89482a56 JL |
836 | cifs_reconnect(server); |
837 | wake_up(&server->response_q); | |
838 | continue; | |
e4eb295d | 839 | } |
e7015fb1 | 840 | |
89482a56 | 841 | /* read down to the MID */ |
e28bc5b1 | 842 | length = cifs_read_from_socket(server, buf + 4, |
1887f601 | 843 | HEADER_SIZE(server) - 1 - 4); |
89482a56 | 844 | if (length < 0) |
e4eb295d | 845 | continue; |
2a37ef94 | 846 | server->total_read += length; |
1da177e4 | 847 | |
8aa26f3e | 848 | mid_entry = server->ops->find_mid(server, buf); |
50c2f753 | 849 | |
44d22d84 JL |
850 | if (!mid_entry || !mid_entry->receive) |
851 | length = standard_receive3(server, mid_entry); | |
852 | else | |
853 | length = mid_entry->receive(server, mid_entry); | |
71823baf | 854 | |
e9097ab4 | 855 | if (length < 0) |
fe11e4cc | 856 | continue; |
1da177e4 | 857 | |
d4e4854f | 858 | if (server->large_buf) |
2a37ef94 | 859 | buf = server->bigbuf; |
fda35943 | 860 | |
fda35943 | 861 | server->lstrp = jiffies; |
2b84a36c | 862 | if (mid_entry != NULL) { |
2a37ef94 JL |
863 | if (!mid_entry->multiRsp || mid_entry->multiEnd) |
864 | mid_entry->callback(mid_entry); | |
7f0adb53 PS |
865 | } else if (!server->ops->is_oplock_break || |
866 | !server->ops->is_oplock_break(buf, server)) { | |
f96637be JP |
867 | cifs_dbg(VFS, "No task to wake, unknown frame received! NumMids %d\n", |
868 | atomic_read(&midCount)); | |
1887f601 PS |
869 | cifs_dump_mem("Received Data is: ", buf, |
870 | HEADER_SIZE(server)); | |
3979877e | 871 | #ifdef CONFIG_CIFS_DEBUG2 |
7f0adb53 PS |
872 | if (server->ops->dump_detail) |
873 | server->ops->dump_detail(buf); | |
3979877e SF |
874 | cifs_dump_mids(server); |
875 | #endif /* CIFS_DEBUG2 */ | |
50c2f753 | 876 | |
e4eb295d SF |
877 | } |
878 | } /* end while !EXITING */ | |
879 | ||
fd62cb7e | 880 | /* buffer usually freed in free_mid - need to free it here on exit */ |
2a37ef94 JL |
881 | cifs_buf_release(server->bigbuf); |
882 | if (server->smallbuf) /* no sense logging a debug message if NULL */ | |
883 | cifs_small_buf_release(server->smallbuf); | |
1da177e4 | 884 | |
a5c3e1c7 | 885 | task_to_wake = xchg(&server->tsk, NULL); |
762dfd10 | 886 | clean_demultiplex_info(server); |
a5c3e1c7 SF |
887 | |
888 | /* if server->tsk was NULL then wait for a signal before exiting */ | |
889 | if (!task_to_wake) { | |
890 | set_current_state(TASK_INTERRUPTIBLE); | |
891 | while (!signal_pending(current)) { | |
892 | schedule(); | |
893 | set_current_state(TASK_INTERRUPTIBLE); | |
894 | } | |
895 | set_current_state(TASK_RUNNING); | |
896 | } | |
897 | ||
0468a2cf | 898 | module_put_and_exit(0); |
1da177e4 LT |
899 | } |
900 | ||
c359cf3c JL |
901 | /* extract the host portion of the UNC string */ |
902 | static char * | |
903 | extract_hostname(const char *unc) | |
904 | { | |
905 | const char *src; | |
906 | char *dst, *delim; | |
907 | unsigned int len; | |
908 | ||
909 | /* skip double chars at beginning of string */ | |
910 | /* BB: check validity of these bytes? */ | |
911 | src = unc + 2; | |
912 | ||
913 | /* delimiter between hostname and sharename is always '\\' now */ | |
914 | delim = strchr(src, '\\'); | |
915 | if (!delim) | |
916 | return ERR_PTR(-EINVAL); | |
917 | ||
918 | len = delim - src; | |
919 | dst = kmalloc((len + 1), GFP_KERNEL); | |
920 | if (dst == NULL) | |
921 | return ERR_PTR(-ENOMEM); | |
922 | ||
923 | memcpy(dst, src, len); | |
924 | dst[len] = '\0'; | |
925 | ||
926 | return dst; | |
927 | } | |
928 | ||
8830d7e0 SP |
929 | static int get_option_ul(substring_t args[], unsigned long *option) |
930 | { | |
931 | int rc; | |
932 | char *string; | |
933 | ||
934 | string = match_strdup(args); | |
935 | if (string == NULL) | |
936 | return -ENOMEM; | |
bfa890a3 | 937 | rc = kstrtoul(string, 0, option); |
8830d7e0 SP |
938 | kfree(string); |
939 | ||
940 | return rc; | |
941 | } | |
942 | ||
3da46565 EB |
943 | static int get_option_uid(substring_t args[], kuid_t *result) |
944 | { | |
945 | unsigned long value; | |
946 | kuid_t uid; | |
947 | int rc; | |
948 | ||
949 | rc = get_option_ul(args, &value); | |
950 | if (rc) | |
951 | return rc; | |
952 | ||
953 | uid = make_kuid(current_user_ns(), value); | |
954 | if (!uid_valid(uid)) | |
955 | return -EINVAL; | |
956 | ||
957 | *result = uid; | |
958 | return 0; | |
959 | } | |
960 | ||
961 | static int get_option_gid(substring_t args[], kgid_t *result) | |
962 | { | |
963 | unsigned long value; | |
964 | kgid_t gid; | |
965 | int rc; | |
966 | ||
967 | rc = get_option_ul(args, &value); | |
968 | if (rc) | |
969 | return rc; | |
970 | ||
971 | gid = make_kgid(current_user_ns(), value); | |
972 | if (!gid_valid(gid)) | |
973 | return -EINVAL; | |
974 | ||
975 | *result = gid; | |
976 | return 0; | |
977 | } | |
8830d7e0 SP |
978 | |
979 | static int cifs_parse_security_flavors(char *value, | |
980 | struct smb_vol *vol) | |
981 | { | |
982 | ||
983 | substring_t args[MAX_OPT_ARGS]; | |
984 | ||
1e3cc57e JL |
985 | /* |
986 | * With mount options, the last one should win. Reset any existing | |
987 | * settings back to default. | |
988 | */ | |
989 | vol->sectype = Unspecified; | |
990 | vol->sign = false; | |
991 | ||
8830d7e0 | 992 | switch (match_token(value, cifs_secflavor_tokens, args)) { |
3f618223 JL |
993 | case Opt_sec_krb5p: |
994 | cifs_dbg(VFS, "sec=krb5p is not supported!\n"); | |
995 | return 1; | |
996 | case Opt_sec_krb5i: | |
997 | vol->sign = true; | |
998 | /* Fallthrough */ | |
8830d7e0 | 999 | case Opt_sec_krb5: |
1e3cc57e | 1000 | vol->sectype = Kerberos; |
8830d7e0 | 1001 | break; |
3f618223 | 1002 | case Opt_sec_ntlmsspi: |
1e3cc57e | 1003 | vol->sign = true; |
3f618223 | 1004 | /* Fallthrough */ |
8830d7e0 | 1005 | case Opt_sec_ntlmssp: |
1e3cc57e | 1006 | vol->sectype = RawNTLMSSP; |
8830d7e0 | 1007 | break; |
3f618223 | 1008 | case Opt_sec_ntlmi: |
1e3cc57e | 1009 | vol->sign = true; |
3f618223 | 1010 | /* Fallthrough */ |
8830d7e0 | 1011 | case Opt_ntlm: |
1e3cc57e | 1012 | vol->sectype = NTLM; |
8830d7e0 | 1013 | break; |
3f618223 | 1014 | case Opt_sec_ntlmv2i: |
1e3cc57e | 1015 | vol->sign = true; |
3f618223 | 1016 | /* Fallthrough */ |
7659624f | 1017 | case Opt_sec_ntlmv2: |
1e3cc57e | 1018 | vol->sectype = NTLMv2; |
8830d7e0 SP |
1019 | break; |
1020 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
1021 | case Opt_sec_lanman: | |
1e3cc57e | 1022 | vol->sectype = LANMAN; |
8830d7e0 SP |
1023 | break; |
1024 | #endif | |
1025 | case Opt_sec_none: | |
1026 | vol->nullauth = 1; | |
1027 | break; | |
1028 | default: | |
f96637be | 1029 | cifs_dbg(VFS, "bad security option: %s\n", value); |
8830d7e0 SP |
1030 | return 1; |
1031 | } | |
1032 | ||
1033 | return 0; | |
1034 | } | |
1035 | ||
15b6a473 JL |
1036 | static int |
1037 | cifs_parse_cache_flavor(char *value, struct smb_vol *vol) | |
1038 | { | |
1039 | substring_t args[MAX_OPT_ARGS]; | |
1040 | ||
1041 | switch (match_token(value, cifs_cacheflavor_tokens, args)) { | |
1042 | case Opt_cache_loose: | |
1043 | vol->direct_io = false; | |
1044 | vol->strict_io = false; | |
1045 | break; | |
1046 | case Opt_cache_strict: | |
1047 | vol->direct_io = false; | |
1048 | vol->strict_io = true; | |
1049 | break; | |
1050 | case Opt_cache_none: | |
1051 | vol->direct_io = true; | |
1052 | vol->strict_io = false; | |
1053 | break; | |
1054 | default: | |
f96637be | 1055 | cifs_dbg(VFS, "bad cache= option: %s\n", value); |
15b6a473 JL |
1056 | return 1; |
1057 | } | |
1058 | return 0; | |
1059 | } | |
1060 | ||
23db65f5 JL |
1061 | static int |
1062 | cifs_parse_smb_version(char *value, struct smb_vol *vol) | |
1063 | { | |
1064 | substring_t args[MAX_OPT_ARGS]; | |
1065 | ||
1066 | switch (match_token(value, cifs_smb_version_tokens, args)) { | |
1067 | case Smb_1: | |
1068 | vol->ops = &smb1_operations; | |
1069 | vol->vals = &smb1_values; | |
1070 | break; | |
1080ef75 | 1071 | #ifdef CONFIG_CIFS_SMB2 |
dd446b16 | 1072 | case Smb_20: |
53ef1016 | 1073 | vol->ops = &smb20_operations; |
dd446b16 SF |
1074 | vol->vals = &smb20_values; |
1075 | break; | |
1080ef75 SF |
1076 | case Smb_21: |
1077 | vol->ops = &smb21_operations; | |
1078 | vol->vals = &smb21_values; | |
1079 | break; | |
e4aa25e7 | 1080 | case Smb_30: |
38107d45 | 1081 | vol->ops = &smb30_operations; |
e4aa25e7 SF |
1082 | vol->vals = &smb30_values; |
1083 | break; | |
20b6d8b4 SF |
1084 | case Smb_302: |
1085 | vol->ops = &smb30_operations; /* currently identical with 3.0 */ | |
1086 | vol->vals = &smb302_values; | |
1087 | break; | |
5f7fbf73 SF |
1088 | #ifdef CONFIG_CIFS_SMB311 |
1089 | case Smb_311: | |
aab1893d | 1090 | vol->ops = &smb311_operations; |
5f7fbf73 SF |
1091 | vol->vals = &smb311_values; |
1092 | break; | |
1093 | #endif /* SMB311 */ | |
1080ef75 | 1094 | #endif |
23db65f5 | 1095 | default: |
f96637be | 1096 | cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value); |
23db65f5 JL |
1097 | return 1; |
1098 | } | |
1099 | return 0; | |
1100 | } | |
1101 | ||
d387a5c5 JL |
1102 | /* |
1103 | * Parse a devname into substrings and populate the vol->UNC and vol->prepath | |
1104 | * fields with the result. Returns 0 on success and an error otherwise. | |
1105 | */ | |
1106 | static int | |
1107 | cifs_parse_devname(const char *devname, struct smb_vol *vol) | |
1108 | { | |
1109 | char *pos; | |
1110 | const char *delims = "/\\"; | |
1111 | size_t len; | |
1112 | ||
1113 | /* make sure we have a valid UNC double delimiter prefix */ | |
1114 | len = strspn(devname, delims); | |
1115 | if (len != 2) | |
1116 | return -EINVAL; | |
1117 | ||
1118 | /* find delimiter between host and sharename */ | |
1119 | pos = strpbrk(devname + 2, delims); | |
1120 | if (!pos) | |
1121 | return -EINVAL; | |
1122 | ||
1123 | /* skip past delimiter */ | |
1124 | ++pos; | |
1125 | ||
1126 | /* now go until next delimiter or end of string */ | |
1127 | len = strcspn(pos, delims); | |
1128 | ||
1129 | /* move "pos" up to delimiter or NULL */ | |
1130 | pos += len; | |
1131 | vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL); | |
1132 | if (!vol->UNC) | |
1133 | return -ENOMEM; | |
1134 | ||
1135 | convert_delimiter(vol->UNC, '\\'); | |
1136 | ||
1137 | /* If pos is NULL, or is a bogus trailing delimiter then no prepath */ | |
1138 | if (!*pos++ || !*pos) | |
1139 | return 0; | |
1140 | ||
1141 | vol->prepath = kstrdup(pos, GFP_KERNEL); | |
1142 | if (!vol->prepath) | |
1143 | return -ENOMEM; | |
1144 | ||
1145 | return 0; | |
1146 | } | |
1147 | ||
1da177e4 | 1148 | static int |
b946845a | 1149 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
50c2f753 | 1150 | struct smb_vol *vol) |
1da177e4 | 1151 | { |
8830d7e0 | 1152 | char *data, *end; |
957df453 | 1153 | char *mountdata_copy = NULL, *options; |
1da177e4 LT |
1154 | unsigned int temp_len, i, j; |
1155 | char separator[2]; | |
9b9d6b24 JL |
1156 | short int override_uid = -1; |
1157 | short int override_gid = -1; | |
1158 | bool uid_specified = false; | |
1159 | bool gid_specified = false; | |
d8162558 JL |
1160 | bool sloppy = false; |
1161 | char *invalid = NULL; | |
88463999 | 1162 | char *nodename = utsname()->nodename; |
8830d7e0 SP |
1163 | char *string = NULL; |
1164 | char *tmp_end, *value; | |
1165 | char delim; | |
b979aaa1 JL |
1166 | bool got_ip = false; |
1167 | unsigned short port = 0; | |
1168 | struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr; | |
1da177e4 LT |
1169 | |
1170 | separator[0] = ','; | |
50c2f753 | 1171 | separator[1] = 0; |
8830d7e0 | 1172 | delim = separator[0]; |
1da177e4 | 1173 | |
6ee9542a JL |
1174 | /* ensure we always start with zeroed-out smb_vol */ |
1175 | memset(vol, 0, sizeof(*vol)); | |
1176 | ||
88463999 JL |
1177 | /* |
1178 | * does not have to be perfect mapping since field is | |
1179 | * informational, only used for servers that do not support | |
1180 | * port 445 and it can be overridden at mount time | |
1181 | */ | |
1397f2ee JL |
1182 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
1183 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
1184 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
1185 | ||
1397f2ee | 1186 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
1187 | /* null target name indicates to use *SMBSERVR default called name |
1188 | if we end up sending RFC1001 session initialize */ | |
1189 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
1190 | vol->cred_uid = current_uid(); |
1191 | vol->linux_uid = current_uid(); | |
a001e5b5 | 1192 | vol->linux_gid = current_gid(); |
f55ed1a8 | 1193 | |
2baa2682 SF |
1194 | /* |
1195 | * default to SFM style remapping of seven reserved characters | |
1196 | * unless user overrides it or we negotiate CIFS POSIX where | |
1197 | * it is unnecessary. Can not simultaneously use more than one mapping | |
1198 | * since then readdir could list files that open could not open | |
1199 | */ | |
1200 | vol->remap = true; | |
1201 | ||
f55ed1a8 JL |
1202 | /* default to only allowing write access to owner of the mount */ |
1203 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
1204 | |
1205 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
1206 | /* default is always to request posix paths. */ |
1207 | vol->posix_paths = 1; | |
a0c9217f JL |
1208 | /* default to using server inode numbers where available */ |
1209 | vol->server_ino = 1; | |
ac67055e | 1210 | |
1b359204 JL |
1211 | /* default is to use strict cifs caching semantics */ |
1212 | vol->strict_io = true; | |
1213 | ||
6d20e840 SJ |
1214 | vol->actimeo = CIFS_DEF_ACTIMEO; |
1215 | ||
23db65f5 JL |
1216 | /* FIXME: add autonegotiation -- for now, SMB1 is default */ |
1217 | vol->ops = &smb1_operations; | |
1218 | vol->vals = &smb1_values; | |
1219 | ||
b946845a SF |
1220 | if (!mountdata) |
1221 | goto cifs_parse_mount_err; | |
1222 | ||
1223 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); | |
1224 | if (!mountdata_copy) | |
1225 | goto cifs_parse_mount_err; | |
1da177e4 | 1226 | |
b946845a | 1227 | options = mountdata_copy; |
4906e50b | 1228 | end = options + strlen(options); |
8830d7e0 | 1229 | |
50c2f753 | 1230 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 1231 | if (options[4] != 0) { |
1da177e4 LT |
1232 | separator[0] = options[4]; |
1233 | options += 5; | |
1234 | } else { | |
f96637be | 1235 | cifs_dbg(FYI, "Null separator not allowed\n"); |
1da177e4 LT |
1236 | } |
1237 | } | |
3d3ea8e6 SP |
1238 | vol->backupuid_specified = false; /* no backup intent for a user */ |
1239 | vol->backupgid_specified = false; /* no backup intent for a group */ | |
50c2f753 | 1240 | |
37d4f99b JL |
1241 | switch (cifs_parse_devname(devname, vol)) { |
1242 | case 0: | |
1243 | break; | |
1244 | case -ENOMEM: | |
1245 | cifs_dbg(VFS, "Unable to allocate memory for devname.\n"); | |
1246 | goto cifs_parse_mount_err; | |
1247 | case -EINVAL: | |
1248 | cifs_dbg(VFS, "Malformed UNC in devname.\n"); | |
1249 | goto cifs_parse_mount_err; | |
1250 | default: | |
1251 | cifs_dbg(VFS, "Unknown error parsing devname.\n"); | |
1252 | goto cifs_parse_mount_err; | |
d387a5c5 JL |
1253 | } |
1254 | ||
1da177e4 | 1255 | while ((data = strsep(&options, separator)) != NULL) { |
8830d7e0 SP |
1256 | substring_t args[MAX_OPT_ARGS]; |
1257 | unsigned long option; | |
1258 | int token; | |
1259 | ||
1da177e4 LT |
1260 | if (!*data) |
1261 | continue; | |
1da177e4 | 1262 | |
8830d7e0 SP |
1263 | token = match_token(data, cifs_mount_option_tokens, args); |
1264 | ||
1265 | switch (token) { | |
1266 | ||
1267 | /* Ingnore the following */ | |
1268 | case Opt_ignore: | |
1269 | break; | |
1270 | ||
1271 | /* Boolean values */ | |
1272 | case Opt_user_xattr: | |
1da177e4 | 1273 | vol->no_xattr = 0; |
8830d7e0 SP |
1274 | break; |
1275 | case Opt_nouser_xattr: | |
1da177e4 | 1276 | vol->no_xattr = 1; |
8830d7e0 SP |
1277 | break; |
1278 | case Opt_forceuid: | |
9b9d6b24 | 1279 | override_uid = 1; |
8830d7e0 SP |
1280 | break; |
1281 | case Opt_noforceuid: | |
9b9d6b24 | 1282 | override_uid = 0; |
8830d7e0 | 1283 | break; |
72bd481f JL |
1284 | case Opt_forcegid: |
1285 | override_gid = 1; | |
1286 | break; | |
1287 | case Opt_noforcegid: | |
1288 | override_gid = 0; | |
1289 | break; | |
8830d7e0 | 1290 | case Opt_noblocksend: |
edf1ae40 | 1291 | vol->noblocksnd = 1; |
8830d7e0 SP |
1292 | break; |
1293 | case Opt_noautotune: | |
edf1ae40 | 1294 | vol->noautotune = 1; |
8830d7e0 SP |
1295 | break; |
1296 | case Opt_hard: | |
1da177e4 | 1297 | vol->retry = 1; |
8830d7e0 SP |
1298 | break; |
1299 | case Opt_soft: | |
1da177e4 | 1300 | vol->retry = 0; |
8830d7e0 SP |
1301 | break; |
1302 | case Opt_perm: | |
1da177e4 | 1303 | vol->noperm = 0; |
8830d7e0 SP |
1304 | break; |
1305 | case Opt_noperm: | |
1da177e4 | 1306 | vol->noperm = 1; |
8830d7e0 SP |
1307 | break; |
1308 | case Opt_mapchars: | |
2baa2682 SF |
1309 | vol->sfu_remap = true; |
1310 | vol->remap = false; /* disable SFM mapping */ | |
8830d7e0 SP |
1311 | break; |
1312 | case Opt_nomapchars: | |
2baa2682 SF |
1313 | vol->sfu_remap = false; |
1314 | break; | |
1315 | case Opt_mapposix: | |
1316 | vol->remap = true; | |
1317 | vol->sfu_remap = false; /* disable SFU mapping */ | |
1318 | break; | |
1319 | case Opt_nomapposix: | |
1320 | vol->remap = false; | |
8830d7e0 SP |
1321 | break; |
1322 | case Opt_sfu: | |
50c2f753 | 1323 | vol->sfu_emul = 1; |
8830d7e0 SP |
1324 | break; |
1325 | case Opt_nosfu: | |
50c2f753 | 1326 | vol->sfu_emul = 0; |
8830d7e0 SP |
1327 | break; |
1328 | case Opt_nodfs: | |
2c1b8615 | 1329 | vol->nodfs = 1; |
8830d7e0 SP |
1330 | break; |
1331 | case Opt_posixpaths: | |
ac67055e | 1332 | vol->posix_paths = 1; |
8830d7e0 SP |
1333 | break; |
1334 | case Opt_noposixpaths: | |
ac67055e | 1335 | vol->posix_paths = 0; |
8830d7e0 SP |
1336 | break; |
1337 | case Opt_nounix: | |
c18c842b | 1338 | vol->no_linux_ext = 1; |
8830d7e0 SP |
1339 | break; |
1340 | case Opt_nocase: | |
50c2f753 | 1341 | vol->nocase = 1; |
8830d7e0 SP |
1342 | break; |
1343 | case Opt_brl: | |
c46fa8ac | 1344 | vol->nobrl = 0; |
8830d7e0 SP |
1345 | break; |
1346 | case Opt_nobrl: | |
c46fa8ac | 1347 | vol->nobrl = 1; |
5cfdddcf PS |
1348 | /* |
1349 | * turn off mandatory locking in mode | |
8830d7e0 | 1350 | * if remote locking is turned off since the |
5cfdddcf PS |
1351 | * local vfs will do advisory |
1352 | */ | |
50c2f753 SF |
1353 | if (vol->file_mode == |
1354 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1355 | vol->file_mode = S_IALLUGO; |
8830d7e0 SP |
1356 | break; |
1357 | case Opt_forcemandatorylock: | |
13a6e42a | 1358 | vol->mand_lock = 1; |
8830d7e0 SP |
1359 | break; |
1360 | case Opt_setuids: | |
1da177e4 | 1361 | vol->setuids = 1; |
8830d7e0 SP |
1362 | break; |
1363 | case Opt_nosetuids: | |
1da177e4 | 1364 | vol->setuids = 0; |
8830d7e0 SP |
1365 | break; |
1366 | case Opt_dynperm: | |
d0a9c078 | 1367 | vol->dynperm = true; |
8830d7e0 SP |
1368 | break; |
1369 | case Opt_nodynperm: | |
d0a9c078 | 1370 | vol->dynperm = false; |
8830d7e0 SP |
1371 | break; |
1372 | case Opt_nohard: | |
1da177e4 | 1373 | vol->retry = 0; |
8830d7e0 SP |
1374 | break; |
1375 | case Opt_nosoft: | |
1da177e4 | 1376 | vol->retry = 1; |
8830d7e0 SP |
1377 | break; |
1378 | case Opt_nointr: | |
1da177e4 | 1379 | vol->intr = 0; |
8830d7e0 SP |
1380 | break; |
1381 | case Opt_intr: | |
1da177e4 | 1382 | vol->intr = 1; |
8830d7e0 SP |
1383 | break; |
1384 | case Opt_nostrictsync: | |
be652445 | 1385 | vol->nostrictsync = 1; |
8830d7e0 SP |
1386 | break; |
1387 | case Opt_strictsync: | |
be652445 | 1388 | vol->nostrictsync = 0; |
8830d7e0 SP |
1389 | break; |
1390 | case Opt_serverino: | |
1da177e4 | 1391 | vol->server_ino = 1; |
8830d7e0 SP |
1392 | break; |
1393 | case Opt_noserverino: | |
1da177e4 | 1394 | vol->server_ino = 0; |
8830d7e0 SP |
1395 | break; |
1396 | case Opt_rwpidforward: | |
d4ffff1f | 1397 | vol->rwpidforward = 1; |
8830d7e0 SP |
1398 | break; |
1399 | case Opt_cifsacl: | |
0a4b92c0 | 1400 | vol->cifs_acl = 1; |
8830d7e0 SP |
1401 | break; |
1402 | case Opt_nocifsacl: | |
0a4b92c0 | 1403 | vol->cifs_acl = 0; |
8830d7e0 SP |
1404 | break; |
1405 | case Opt_acl: | |
1da177e4 | 1406 | vol->no_psx_acl = 0; |
8830d7e0 SP |
1407 | break; |
1408 | case Opt_noacl: | |
1da177e4 | 1409 | vol->no_psx_acl = 1; |
8830d7e0 SP |
1410 | break; |
1411 | case Opt_locallease: | |
84210e91 | 1412 | vol->local_lease = 1; |
8830d7e0 SP |
1413 | break; |
1414 | case Opt_sign: | |
1e3cc57e | 1415 | vol->sign = true; |
8830d7e0 SP |
1416 | break; |
1417 | case Opt_seal: | |
95b1cb90 | 1418 | /* we do not do the following in secFlags because seal |
8830d7e0 SP |
1419 | * is a per tree connection (mount) not a per socket |
1420 | * or per-smb connection option in the protocol | |
1421 | * vol->secFlg |= CIFSSEC_MUST_SEAL; | |
1422 | */ | |
95b1cb90 | 1423 | vol->seal = 1; |
8830d7e0 | 1424 | break; |
8830d7e0 | 1425 | case Opt_noac: |
0b456f04 | 1426 | pr_warn("CIFS: Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n"); |
8830d7e0 SP |
1427 | break; |
1428 | case Opt_fsc: | |
607a569d | 1429 | #ifndef CONFIG_CIFS_FSCACHE |
f96637be | 1430 | cifs_dbg(VFS, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n"); |
b946845a | 1431 | goto cifs_parse_mount_err; |
607a569d | 1432 | #endif |
fa1df75d | 1433 | vol->fsc = true; |
8830d7e0 SP |
1434 | break; |
1435 | case Opt_mfsymlinks: | |
736a3320 | 1436 | vol->mfsymlinks = true; |
8830d7e0 SP |
1437 | break; |
1438 | case Opt_multiuser: | |
0eb8a132 | 1439 | vol->multiuser = true; |
8830d7e0 | 1440 | break; |
d8162558 JL |
1441 | case Opt_sloppy: |
1442 | sloppy = true; | |
1443 | break; | |
a0b3df5c JL |
1444 | case Opt_nosharesock: |
1445 | vol->nosharesock = true; | |
1446 | break; | |
b2a30774 SF |
1447 | case Opt_nopersistent: |
1448 | vol->nopersistent = true; | |
1449 | if (vol->persistent) { | |
1450 | cifs_dbg(VFS, | |
1451 | "persistenthandles mount options conflict\n"); | |
1452 | goto cifs_parse_mount_err; | |
1453 | } | |
1454 | break; | |
1455 | case Opt_persistent: | |
1456 | vol->persistent = true; | |
592fafe6 | 1457 | if ((vol->nopersistent) || (vol->resilient)) { |
b2a30774 SF |
1458 | cifs_dbg(VFS, |
1459 | "persistenthandles mount options conflict\n"); | |
1460 | goto cifs_parse_mount_err; | |
1461 | } | |
1462 | break; | |
592fafe6 SF |
1463 | case Opt_resilient: |
1464 | vol->resilient = true; | |
1465 | if (vol->persistent) { | |
1466 | cifs_dbg(VFS, | |
1467 | "persistenthandles mount options conflict\n"); | |
1468 | goto cifs_parse_mount_err; | |
1469 | } | |
1470 | break; | |
1471 | case Opt_noresilient: | |
1472 | vol->resilient = false; /* already the default */ | |
1473 | break; | |
8830d7e0 SP |
1474 | |
1475 | /* Numeric Values */ | |
1476 | case Opt_backupuid: | |
3da46565 | 1477 | if (get_option_uid(args, &vol->backupuid)) { |
f96637be JP |
1478 | cifs_dbg(VFS, "%s: Invalid backupuid value\n", |
1479 | __func__); | |
3d3ea8e6 SP |
1480 | goto cifs_parse_mount_err; |
1481 | } | |
1482 | vol->backupuid_specified = true; | |
8830d7e0 SP |
1483 | break; |
1484 | case Opt_backupgid: | |
3da46565 | 1485 | if (get_option_gid(args, &vol->backupgid)) { |
f96637be JP |
1486 | cifs_dbg(VFS, "%s: Invalid backupgid value\n", |
1487 | __func__); | |
3d3ea8e6 SP |
1488 | goto cifs_parse_mount_err; |
1489 | } | |
1490 | vol->backupgid_specified = true; | |
8830d7e0 SP |
1491 | break; |
1492 | case Opt_uid: | |
3da46565 | 1493 | if (get_option_uid(args, &vol->linux_uid)) { |
f96637be JP |
1494 | cifs_dbg(VFS, "%s: Invalid uid value\n", |
1495 | __func__); | |
8830d7e0 SP |
1496 | goto cifs_parse_mount_err; |
1497 | } | |
8830d7e0 SP |
1498 | uid_specified = true; |
1499 | break; | |
1500 | case Opt_cruid: | |
3da46565 | 1501 | if (get_option_uid(args, &vol->cred_uid)) { |
f96637be JP |
1502 | cifs_dbg(VFS, "%s: Invalid cruid value\n", |
1503 | __func__); | |
8830d7e0 SP |
1504 | goto cifs_parse_mount_err; |
1505 | } | |
8830d7e0 SP |
1506 | break; |
1507 | case Opt_gid: | |
3da46565 | 1508 | if (get_option_gid(args, &vol->linux_gid)) { |
f96637be JP |
1509 | cifs_dbg(VFS, "%s: Invalid gid value\n", |
1510 | __func__); | |
8830d7e0 SP |
1511 | goto cifs_parse_mount_err; |
1512 | } | |
8830d7e0 SP |
1513 | gid_specified = true; |
1514 | break; | |
1515 | case Opt_file_mode: | |
1516 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1517 | cifs_dbg(VFS, "%s: Invalid file_mode value\n", |
1518 | __func__); | |
8830d7e0 SP |
1519 | goto cifs_parse_mount_err; |
1520 | } | |
1521 | vol->file_mode = option; | |
1522 | break; | |
1523 | case Opt_dirmode: | |
1524 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1525 | cifs_dbg(VFS, "%s: Invalid dir_mode value\n", |
1526 | __func__); | |
8830d7e0 SP |
1527 | goto cifs_parse_mount_err; |
1528 | } | |
1529 | vol->dir_mode = option; | |
1530 | break; | |
1531 | case Opt_port: | |
b979aaa1 JL |
1532 | if (get_option_ul(args, &option) || |
1533 | option > USHRT_MAX) { | |
f96637be JP |
1534 | cifs_dbg(VFS, "%s: Invalid port value\n", |
1535 | __func__); | |
8830d7e0 SP |
1536 | goto cifs_parse_mount_err; |
1537 | } | |
b979aaa1 | 1538 | port = (unsigned short)option; |
8830d7e0 SP |
1539 | break; |
1540 | case Opt_rsize: | |
1541 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1542 | cifs_dbg(VFS, "%s: Invalid rsize value\n", |
1543 | __func__); | |
b946845a | 1544 | goto cifs_parse_mount_err; |
8830d7e0 SP |
1545 | } |
1546 | vol->rsize = option; | |
1547 | break; | |
1548 | case Opt_wsize: | |
1549 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1550 | cifs_dbg(VFS, "%s: Invalid wsize value\n", |
1551 | __func__); | |
8830d7e0 SP |
1552 | goto cifs_parse_mount_err; |
1553 | } | |
1554 | vol->wsize = option; | |
1555 | break; | |
1556 | case Opt_actimeo: | |
1557 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1558 | cifs_dbg(VFS, "%s: Invalid actimeo value\n", |
1559 | __func__); | |
8830d7e0 SP |
1560 | goto cifs_parse_mount_err; |
1561 | } | |
1562 | vol->actimeo = HZ * option; | |
1563 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
f96637be | 1564 | cifs_dbg(VFS, "attribute cache timeout too large\n"); |
8830d7e0 SP |
1565 | goto cifs_parse_mount_err; |
1566 | } | |
1567 | break; | |
adfeb3e0 SF |
1568 | case Opt_echo_interval: |
1569 | if (get_option_ul(args, &option)) { | |
1570 | cifs_dbg(VFS, "%s: Invalid echo interval value\n", | |
1571 | __func__); | |
1572 | goto cifs_parse_mount_err; | |
1573 | } | |
1574 | vol->echo_interval = option; | |
1575 | break; | |
8830d7e0 SP |
1576 | |
1577 | /* String Arguments */ | |
1578 | ||
4fe9e963 SP |
1579 | case Opt_blank_user: |
1580 | /* null user, ie. anonymous authentication */ | |
1581 | vol->nullauth = 1; | |
1582 | vol->username = NULL; | |
1583 | break; | |
8830d7e0 SP |
1584 | case Opt_user: |
1585 | string = match_strdup(args); | |
1586 | if (string == NULL) | |
1587 | goto out_nomem; | |
1588 | ||
8c3a2b4c SL |
1589 | if (strnlen(string, CIFS_MAX_USERNAME_LEN) > |
1590 | CIFS_MAX_USERNAME_LEN) { | |
0b456f04 | 1591 | pr_warn("CIFS: username too long\n"); |
8830d7e0 SP |
1592 | goto cifs_parse_mount_err; |
1593 | } | |
2bd50fb3 TK |
1594 | |
1595 | kfree(vol->username); | |
8830d7e0 | 1596 | vol->username = kstrdup(string, GFP_KERNEL); |
f96637be | 1597 | if (!vol->username) |
8830d7e0 | 1598 | goto cifs_parse_mount_err; |
8830d7e0 SP |
1599 | break; |
1600 | case Opt_blank_pass: | |
8830d7e0 SP |
1601 | /* passwords have to be handled differently |
1602 | * to allow the character used for deliminator | |
1603 | * to be passed within them | |
1604 | */ | |
1605 | ||
c369c9a4 SP |
1606 | /* |
1607 | * Check if this is a case where the password | |
1608 | * starts with a delimiter | |
1609 | */ | |
1610 | tmp_end = strchr(data, '='); | |
1611 | tmp_end++; | |
1612 | if (!(tmp_end < end && tmp_end[1] == delim)) { | |
1613 | /* No it is not. Set the password to NULL */ | |
d6ccf499 | 1614 | kfree(vol->password); |
c369c9a4 SP |
1615 | vol->password = NULL; |
1616 | break; | |
1617 | } | |
1618 | /* Yes it is. Drop down to Opt_pass below.*/ | |
1619 | case Opt_pass: | |
8830d7e0 SP |
1620 | /* Obtain the value string */ |
1621 | value = strchr(data, '='); | |
10238074 | 1622 | value++; |
8830d7e0 SP |
1623 | |
1624 | /* Set tmp_end to end of the string */ | |
1625 | tmp_end = (char *) value + strlen(value); | |
1626 | ||
1627 | /* Check if following character is the deliminator | |
1628 | * If yes, we have encountered a double deliminator | |
1629 | * reset the NULL character to the deliminator | |
1630 | */ | |
e73f843a | 1631 | if (tmp_end < end && tmp_end[1] == delim) { |
8830d7e0 SP |
1632 | tmp_end[0] = delim; |
1633 | ||
e73f843a SJ |
1634 | /* Keep iterating until we get to a single |
1635 | * deliminator OR the end | |
1636 | */ | |
1637 | while ((tmp_end = strchr(tmp_end, delim)) | |
1638 | != NULL && (tmp_end[1] == delim)) { | |
1639 | tmp_end = (char *) &tmp_end[2]; | |
1640 | } | |
1641 | ||
1642 | /* Reset var options to point to next element */ | |
1643 | if (tmp_end) { | |
1644 | tmp_end[0] = '\0'; | |
1645 | options = (char *) &tmp_end[1]; | |
1646 | } else | |
1647 | /* Reached the end of the mount option | |
1648 | * string */ | |
1649 | options = end; | |
8830d7e0 SP |
1650 | } |
1651 | ||
d6ccf499 | 1652 | kfree(vol->password); |
8830d7e0 SP |
1653 | /* Now build new password string */ |
1654 | temp_len = strlen(value); | |
1655 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); | |
1656 | if (vol->password == NULL) { | |
0b456f04 | 1657 | pr_warn("CIFS: no memory for password\n"); |
8830d7e0 SP |
1658 | goto cifs_parse_mount_err; |
1659 | } | |
1660 | ||
1661 | for (i = 0, j = 0; i < temp_len; i++, j++) { | |
1662 | vol->password[j] = value[i]; | |
1663 | if ((value[i] == delim) && | |
1664 | value[i+1] == delim) | |
1665 | /* skip the second deliminator */ | |
1666 | i++; | |
1667 | } | |
1668 | vol->password[j] = '\0'; | |
1669 | break; | |
4fe9e963 | 1670 | case Opt_blank_ip: |
b979aaa1 JL |
1671 | /* FIXME: should this be an error instead? */ |
1672 | got_ip = false; | |
4fe9e963 | 1673 | break; |
8830d7e0 SP |
1674 | case Opt_ip: |
1675 | string = match_strdup(args); | |
1676 | if (string == NULL) | |
1677 | goto out_nomem; | |
1678 | ||
b979aaa1 JL |
1679 | if (!cifs_convert_address(dstaddr, string, |
1680 | strlen(string))) { | |
0b456f04 | 1681 | pr_err("CIFS: bad ip= option (%s).\n", string); |
8830d7e0 SP |
1682 | goto cifs_parse_mount_err; |
1683 | } | |
b979aaa1 | 1684 | got_ip = true; |
8830d7e0 | 1685 | break; |
8830d7e0 SP |
1686 | case Opt_domain: |
1687 | string = match_strdup(args); | |
1688 | if (string == NULL) | |
1689 | goto out_nomem; | |
1690 | ||
057d6332 CG |
1691 | if (strnlen(string, CIFS_MAX_DOMAINNAME_LEN) |
1692 | == CIFS_MAX_DOMAINNAME_LEN) { | |
0b456f04 | 1693 | pr_warn("CIFS: domain name too long\n"); |
8830d7e0 SP |
1694 | goto cifs_parse_mount_err; |
1695 | } | |
1696 | ||
2bd50fb3 | 1697 | kfree(vol->domainname); |
8830d7e0 SP |
1698 | vol->domainname = kstrdup(string, GFP_KERNEL); |
1699 | if (!vol->domainname) { | |
0b456f04 | 1700 | pr_warn("CIFS: no memory for domainname\n"); |
8830d7e0 SP |
1701 | goto cifs_parse_mount_err; |
1702 | } | |
f96637be | 1703 | cifs_dbg(FYI, "Domain name set\n"); |
8830d7e0 SP |
1704 | break; |
1705 | case Opt_srcaddr: | |
1706 | string = match_strdup(args); | |
1707 | if (string == NULL) | |
1708 | goto out_nomem; | |
1709 | ||
4fe9e963 | 1710 | if (!cifs_convert_address( |
8830d7e0 SP |
1711 | (struct sockaddr *)&vol->srcaddr, |
1712 | string, strlen(string))) { | |
0b456f04 AS |
1713 | pr_warn("CIFS: Could not parse srcaddr: %s\n", |
1714 | string); | |
8830d7e0 SP |
1715 | goto cifs_parse_mount_err; |
1716 | } | |
1717 | break; | |
8830d7e0 SP |
1718 | case Opt_iocharset: |
1719 | string = match_strdup(args); | |
1720 | if (string == NULL) | |
1721 | goto out_nomem; | |
1722 | ||
4fe9e963 | 1723 | if (strnlen(string, 1024) >= 65) { |
0b456f04 | 1724 | pr_warn("CIFS: iocharset name too long.\n"); |
8830d7e0 SP |
1725 | goto cifs_parse_mount_err; |
1726 | } | |
1727 | ||
87e747cd | 1728 | if (strncasecmp(string, "default", 7) != 0) { |
2bd50fb3 | 1729 | kfree(vol->iocharset); |
8830d7e0 SP |
1730 | vol->iocharset = kstrdup(string, |
1731 | GFP_KERNEL); | |
1732 | if (!vol->iocharset) { | |
0b456f04 | 1733 | pr_warn("CIFS: no memory for charset\n"); |
8830d7e0 SP |
1734 | goto cifs_parse_mount_err; |
1735 | } | |
1736 | } | |
1737 | /* if iocharset not set then load_nls_default | |
1738 | * is used by caller | |
1739 | */ | |
f96637be | 1740 | cifs_dbg(FYI, "iocharset set to %s\n", string); |
8830d7e0 | 1741 | break; |
8830d7e0 SP |
1742 | case Opt_netbiosname: |
1743 | string = match_strdup(args); | |
1744 | if (string == NULL) | |
1745 | goto out_nomem; | |
1746 | ||
8830d7e0 SP |
1747 | memset(vol->source_rfc1001_name, 0x20, |
1748 | RFC1001_NAME_LEN); | |
1749 | /* | |
1750 | * FIXME: are there cases in which a comma can | |
1751 | * be valid in workstation netbios name (and | |
1752 | * need special handling)? | |
1753 | */ | |
1754 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
1755 | /* don't ucase netbiosname for user */ | |
1756 | if (string[i] == 0) | |
1757 | break; | |
1758 | vol->source_rfc1001_name[i] = string[i]; | |
1759 | } | |
1760 | /* The string has 16th byte zero still from | |
1761 | * set at top of the function | |
1762 | */ | |
1763 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
0b456f04 | 1764 | pr_warn("CIFS: netbiosname longer than 15 truncated.\n"); |
8830d7e0 SP |
1765 | break; |
1766 | case Opt_servern: | |
1767 | /* servernetbiosname specified override *SMBSERVER */ | |
1768 | string = match_strdup(args); | |
1769 | if (string == NULL) | |
1770 | goto out_nomem; | |
1771 | ||
8830d7e0 SP |
1772 | /* last byte, type, is 0x20 for servr type */ |
1773 | memset(vol->target_rfc1001_name, 0x20, | |
1774 | RFC1001_NAME_LEN_WITH_NULL); | |
1775 | ||
1776 | /* BB are there cases in which a comma can be | |
1777 | valid in this workstation netbios name | |
1778 | (and need special handling)? */ | |
1779 | ||
1780 | /* user or mount helper must uppercase the | |
1781 | netbios name */ | |
1782 | for (i = 0; i < 15; i++) { | |
1783 | if (string[i] == 0) | |
1784 | break; | |
1785 | vol->target_rfc1001_name[i] = string[i]; | |
1786 | } | |
1787 | /* The string has 16th byte zero still from | |
1788 | set at top of the function */ | |
1789 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
0b456f04 | 1790 | pr_warn("CIFS: server netbiosname longer than 15 truncated.\n"); |
8830d7e0 SP |
1791 | break; |
1792 | case Opt_ver: | |
1793 | string = match_strdup(args); | |
1794 | if (string == NULL) | |
1795 | goto out_nomem; | |
1796 | ||
87e747cd | 1797 | if (strncasecmp(string, "1", 1) == 0) { |
8830d7e0 SP |
1798 | /* This is the default */ |
1799 | break; | |
1800 | } | |
1801 | /* For all other value, error */ | |
0b456f04 | 1802 | pr_warn("CIFS: Invalid version specified\n"); |
b946845a | 1803 | goto cifs_parse_mount_err; |
23db65f5 JL |
1804 | case Opt_vers: |
1805 | string = match_strdup(args); | |
1806 | if (string == NULL) | |
1807 | goto out_nomem; | |
1808 | ||
1809 | if (cifs_parse_smb_version(string, vol) != 0) | |
1810 | goto cifs_parse_mount_err; | |
1811 | break; | |
8830d7e0 SP |
1812 | case Opt_sec: |
1813 | string = match_strdup(args); | |
1814 | if (string == NULL) | |
1815 | goto out_nomem; | |
1816 | ||
8830d7e0 SP |
1817 | if (cifs_parse_security_flavors(string, vol) != 0) |
1818 | goto cifs_parse_mount_err; | |
1819 | break; | |
15b6a473 JL |
1820 | case Opt_cache: |
1821 | string = match_strdup(args); | |
1822 | if (string == NULL) | |
1823 | goto out_nomem; | |
1824 | ||
1825 | if (cifs_parse_cache_flavor(string, vol) != 0) | |
1826 | goto cifs_parse_mount_err; | |
1827 | break; | |
8830d7e0 | 1828 | default: |
d8162558 JL |
1829 | /* |
1830 | * An option we don't recognize. Save it off for later | |
1831 | * if we haven't already found one | |
1832 | */ | |
1833 | if (!invalid) | |
1834 | invalid = data; | |
8830d7e0 | 1835 | break; |
1da177e4 | 1836 | } |
8830d7e0 SP |
1837 | /* Free up any allocated string */ |
1838 | kfree(string); | |
1839 | string = NULL; | |
1da177e4 | 1840 | } |
0eb8a132 | 1841 | |
d8162558 | 1842 | if (!sloppy && invalid) { |
0b456f04 | 1843 | pr_err("CIFS: Unknown mount option \"%s\"\n", invalid); |
d8162558 JL |
1844 | goto cifs_parse_mount_err; |
1845 | } | |
1846 | ||
8a8798a5 JL |
1847 | #ifndef CONFIG_KEYS |
1848 | /* Muliuser mounts require CONFIG_KEYS support */ | |
1849 | if (vol->multiuser) { | |
f96637be | 1850 | cifs_dbg(VFS, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n"); |
b946845a | 1851 | goto cifs_parse_mount_err; |
0eb8a132 | 1852 | } |
8a8798a5 | 1853 | #endif |
e5e69abd | 1854 | if (!vol->UNC) { |
37d4f99b | 1855 | cifs_dbg(VFS, "CIFS mount error: No usable UNC path provided in device string!\n"); |
e5e69abd JL |
1856 | goto cifs_parse_mount_err; |
1857 | } | |
0eb8a132 | 1858 | |
62a1a439 JL |
1859 | /* make sure UNC has a share name */ |
1860 | if (!strchr(vol->UNC + 3, '\\')) { | |
f96637be | 1861 | cifs_dbg(VFS, "Malformed UNC. Unable to find share name.\n"); |
62a1a439 JL |
1862 | goto cifs_parse_mount_err; |
1863 | } | |
1864 | ||
b979aaa1 JL |
1865 | if (!got_ip) { |
1866 | /* No ip= option specified? Try to get it from UNC */ | |
1867 | if (!cifs_convert_address(dstaddr, &vol->UNC[2], | |
1868 | strlen(&vol->UNC[2]))) { | |
0b456f04 | 1869 | pr_err("Unable to determine destination address.\n"); |
b979aaa1 JL |
1870 | goto cifs_parse_mount_err; |
1871 | } | |
1872 | } | |
1873 | ||
1874 | /* set the port that we got earlier */ | |
1875 | cifs_set_port(dstaddr, port); | |
1da177e4 | 1876 | |
9b9d6b24 JL |
1877 | if (uid_specified) |
1878 | vol->override_uid = override_uid; | |
1879 | else if (override_uid == 1) | |
0b456f04 | 1880 | pr_notice("CIFS: ignoring forceuid mount option specified with no uid= option.\n"); |
9b9d6b24 JL |
1881 | |
1882 | if (gid_specified) | |
1883 | vol->override_gid = override_gid; | |
1884 | else if (override_gid == 1) | |
0b456f04 | 1885 | pr_notice("CIFS: ignoring forcegid mount option specified with no gid= option.\n"); |
9b9d6b24 | 1886 | |
b946845a | 1887 | kfree(mountdata_copy); |
1da177e4 | 1888 | return 0; |
b946845a | 1889 | |
8830d7e0 | 1890 | out_nomem: |
0b456f04 | 1891 | pr_warn("Could not allocate temporary buffer\n"); |
b946845a | 1892 | cifs_parse_mount_err: |
8830d7e0 | 1893 | kfree(string); |
b946845a SF |
1894 | kfree(mountdata_copy); |
1895 | return 1; | |
1da177e4 LT |
1896 | } |
1897 | ||
3eb9a889 BG |
1898 | /** Returns true if srcaddr isn't specified and rhs isn't |
1899 | * specified, or if srcaddr is specified and | |
1900 | * matches the IP address of the rhs argument. | |
1901 | */ | |
1902 | static bool | |
1903 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
1904 | { | |
1905 | switch (srcaddr->sa_family) { | |
1906 | case AF_UNSPEC: | |
1907 | return (rhs->sa_family == AF_UNSPEC); | |
1908 | case AF_INET: { | |
1909 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
1910 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
1911 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
1912 | } | |
1913 | case AF_INET6: { | |
1914 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
e3e2775c | 1915 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs; |
3eb9a889 BG |
1916 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); |
1917 | } | |
1918 | default: | |
1919 | WARN_ON(1); | |
1920 | return false; /* don't expect to be here */ | |
1921 | } | |
1922 | } | |
1923 | ||
4b886136 PS |
1924 | /* |
1925 | * If no port is specified in addr structure, we try to match with 445 port | |
1926 | * and if it fails - with 139 ports. It should be called only if address | |
1927 | * families of server and addr are equal. | |
1928 | */ | |
1929 | static bool | |
1930 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
1931 | { | |
6da97910 | 1932 | __be16 port, *sport; |
4b886136 PS |
1933 | |
1934 | switch (addr->sa_family) { | |
1935 | case AF_INET: | |
1936 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
1937 | port = ((struct sockaddr_in *) addr)->sin_port; | |
1938 | break; | |
1939 | case AF_INET6: | |
1940 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
1941 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
1942 | break; | |
1943 | default: | |
1944 | WARN_ON(1); | |
1945 | return false; | |
1946 | } | |
1947 | ||
1948 | if (!port) { | |
1949 | port = htons(CIFS_PORT); | |
1950 | if (port == *sport) | |
1951 | return true; | |
1952 | ||
1953 | port = htons(RFC1001_PORT); | |
1954 | } | |
1955 | ||
1956 | return port == *sport; | |
1957 | } | |
3eb9a889 | 1958 | |
4515148e | 1959 | static bool |
3eb9a889 BG |
1960 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
1961 | struct sockaddr *srcaddr) | |
4515148e | 1962 | { |
4515148e | 1963 | switch (addr->sa_family) { |
a9f1b85e PS |
1964 | case AF_INET: { |
1965 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
1966 | struct sockaddr_in *srv_addr4 = | |
1967 | (struct sockaddr_in *)&server->dstaddr; | |
1968 | ||
1969 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 1970 | return false; |
4515148e | 1971 | break; |
a9f1b85e PS |
1972 | } |
1973 | case AF_INET6: { | |
1974 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
1975 | struct sockaddr_in6 *srv_addr6 = | |
1976 | (struct sockaddr_in6 *)&server->dstaddr; | |
1977 | ||
4515148e | 1978 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 1979 | &srv_addr6->sin6_addr)) |
4515148e | 1980 | return false; |
a9f1b85e | 1981 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 1982 | return false; |
4515148e JL |
1983 | break; |
1984 | } | |
a9f1b85e PS |
1985 | default: |
1986 | WARN_ON(1); | |
1987 | return false; /* don't expect to be here */ | |
1988 | } | |
4515148e | 1989 | |
3eb9a889 BG |
1990 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
1991 | return false; | |
1992 | ||
4515148e JL |
1993 | return true; |
1994 | } | |
1995 | ||
daf5b0b6 JL |
1996 | static bool |
1997 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
1998 | { | |
3f618223 JL |
1999 | /* |
2000 | * The select_sectype function should either return the vol->sectype | |
2001 | * that was specified, or "Unspecified" if that sectype was not | |
2002 | * compatible with the given NEGOTIATE request. | |
2003 | */ | |
2004 | if (select_sectype(server, vol->sectype) == Unspecified) | |
daf5b0b6 | 2005 | return false; |
daf5b0b6 | 2006 | |
3f618223 JL |
2007 | /* |
2008 | * Now check if signing mode is acceptable. No need to check | |
2009 | * global_secflags at this point since if MUST_SIGN is set then | |
2010 | * the server->sign had better be too. | |
2011 | */ | |
38d77c50 JL |
2012 | if (vol->sign && !server->sign) |
2013 | return false; | |
daf5b0b6 JL |
2014 | |
2015 | return true; | |
2016 | } | |
2017 | ||
9fa114f7 | 2018 | static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol) |
37bb04e5 | 2019 | { |
9fa114f7 JL |
2020 | struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr; |
2021 | ||
a0b3df5c JL |
2022 | if (vol->nosharesock) |
2023 | return 0; | |
2024 | ||
23db65f5 JL |
2025 | if ((server->vals != vol->vals) || (server->ops != vol->ops)) |
2026 | return 0; | |
2027 | ||
37bb04e5 PS |
2028 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) |
2029 | return 0; | |
2030 | ||
2031 | if (!match_address(server, addr, | |
2032 | (struct sockaddr *)&vol->srcaddr)) | |
2033 | return 0; | |
2034 | ||
2035 | if (!match_port(server, addr)) | |
2036 | return 0; | |
2037 | ||
2038 | if (!match_security(server, vol)) | |
2039 | return 0; | |
2040 | ||
adfeb3e0 SF |
2041 | if (server->echo_interval != vol->echo_interval) |
2042 | return 0; | |
2043 | ||
37bb04e5 PS |
2044 | return 1; |
2045 | } | |
2046 | ||
e7ddee90 | 2047 | static struct TCP_Server_Info * |
9fa114f7 | 2048 | cifs_find_tcp_session(struct smb_vol *vol) |
1da177e4 | 2049 | { |
e7ddee90 | 2050 | struct TCP_Server_Info *server; |
e7ddee90 | 2051 | |
3f9bcca7 | 2052 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 2053 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
9fa114f7 | 2054 | if (!match_server(server, vol)) |
daf5b0b6 JL |
2055 | continue; |
2056 | ||
e7ddee90 | 2057 | ++server->srv_count; |
3f9bcca7 | 2058 | spin_unlock(&cifs_tcp_ses_lock); |
f96637be | 2059 | cifs_dbg(FYI, "Existing tcp session with server found\n"); |
e7ddee90 | 2060 | return server; |
1da177e4 | 2061 | } |
3f9bcca7 | 2062 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2063 | return NULL; |
2064 | } | |
1b20d672 | 2065 | |
14fbf50d | 2066 | static void |
e7ddee90 | 2067 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
1da177e4 | 2068 | { |
a5c3e1c7 SF |
2069 | struct task_struct *task; |
2070 | ||
3f9bcca7 | 2071 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 2072 | if (--server->srv_count > 0) { |
3f9bcca7 | 2073 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 2074 | return; |
1da177e4 | 2075 | } |
1b20d672 | 2076 | |
f1d0c998 RL |
2077 | put_net(cifs_net_ns(server)); |
2078 | ||
e7ddee90 | 2079 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 2080 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2081 | |
c74093b6 JL |
2082 | cancel_delayed_work_sync(&server->echo); |
2083 | ||
e7ddee90 JL |
2084 | spin_lock(&GlobalMid_Lock); |
2085 | server->tcpStatus = CifsExiting; | |
2086 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 2087 | |
d2b91521 | 2088 | cifs_crypto_shash_release(server); |
488f1d2d SJ |
2089 | cifs_fscache_release_client_cookie(server); |
2090 | ||
21e73393 SP |
2091 | kfree(server->session_key.response); |
2092 | server->session_key.response = NULL; | |
2093 | server->session_key.len = 0; | |
a5c3e1c7 SF |
2094 | |
2095 | task = xchg(&server->tsk, NULL); | |
2096 | if (task) | |
2097 | force_sig(SIGKILL, task); | |
1da177e4 LT |
2098 | } |
2099 | ||
63c038c2 JL |
2100 | static struct TCP_Server_Info * |
2101 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
2102 | { | |
2103 | struct TCP_Server_Info *tcp_ses = NULL; | |
63c038c2 JL |
2104 | int rc; |
2105 | ||
f96637be | 2106 | cifs_dbg(FYI, "UNC: %s\n", volume_info->UNC); |
63c038c2 JL |
2107 | |
2108 | /* see if we already have a matching tcp_ses */ | |
9fa114f7 | 2109 | tcp_ses = cifs_find_tcp_session(volume_info); |
63c038c2 JL |
2110 | if (tcp_ses) |
2111 | return tcp_ses; | |
2112 | ||
2113 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
2114 | if (!tcp_ses) { | |
2115 | rc = -ENOMEM; | |
2116 | goto out_err; | |
2117 | } | |
2118 | ||
23db65f5 JL |
2119 | tcp_ses->ops = volume_info->ops; |
2120 | tcp_ses->vals = volume_info->vals; | |
f1d0c998 | 2121 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
2122 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
2123 | if (IS_ERR(tcp_ses->hostname)) { | |
2124 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 2125 | goto out_err_crypto_release; |
63c038c2 JL |
2126 | } |
2127 | ||
2128 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
2129 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 2130 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
fc40f9cf | 2131 | tcp_ses->in_flight = 0; |
2d86dbc9 | 2132 | tcp_ses->credits = 1; |
63c038c2 JL |
2133 | init_waitqueue_head(&tcp_ses->response_q); |
2134 | init_waitqueue_head(&tcp_ses->request_q); | |
2135 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
2136 | mutex_init(&tcp_ses->srv_mutex); | |
2137 | memcpy(tcp_ses->workstation_RFC1001_name, | |
2138 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
2139 | memcpy(tcp_ses->server_RFC1001_name, | |
2140 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 2141 | tcp_ses->session_estab = false; |
63c038c2 | 2142 | tcp_ses->sequence_number = 0; |
fda35943 | 2143 | tcp_ses->lstrp = jiffies; |
58fa015f | 2144 | spin_lock_init(&tcp_ses->req_lock); |
63c038c2 JL |
2145 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
2146 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 2147 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
9fa114f7 JL |
2148 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
2149 | sizeof(tcp_ses->srcaddr)); | |
2150 | memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr, | |
2151 | sizeof(tcp_ses->dstaddr)); | |
39552ea8 SP |
2152 | #ifdef CONFIG_CIFS_SMB2 |
2153 | get_random_bytes(tcp_ses->client_guid, SMB2_CLIENT_GUID_SIZE); | |
2154 | #endif | |
63c038c2 JL |
2155 | /* |
2156 | * at this point we are the only ones with the pointer | |
2157 | * to the struct since the kernel thread not created yet | |
2158 | * no need to spinlock this init of tcpStatus or srv_count | |
2159 | */ | |
2160 | tcp_ses->tcpStatus = CifsNew; | |
2161 | ++tcp_ses->srv_count; | |
2162 | ||
adfeb3e0 SF |
2163 | if (volume_info->echo_interval >= SMB_ECHO_INTERVAL_MIN && |
2164 | volume_info->echo_interval <= SMB_ECHO_INTERVAL_MAX) | |
2165 | tcp_ses->echo_interval = volume_info->echo_interval * HZ; | |
2166 | else | |
2167 | tcp_ses->echo_interval = SMB_ECHO_INTERVAL_DEFAULT * HZ; | |
2168 | ||
a9f1b85e | 2169 | rc = ip_connect(tcp_ses); |
63c038c2 | 2170 | if (rc < 0) { |
f96637be | 2171 | cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n"); |
f7c5445a | 2172 | goto out_err_crypto_release; |
63c038c2 JL |
2173 | } |
2174 | ||
2175 | /* | |
2176 | * since we're in a cifs function already, we know that | |
2177 | * this will succeed. No need for try_module_get(). | |
2178 | */ | |
2179 | __module_get(THIS_MODULE); | |
7c97c200 | 2180 | tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, |
63c038c2 JL |
2181 | tcp_ses, "cifsd"); |
2182 | if (IS_ERR(tcp_ses->tsk)) { | |
2183 | rc = PTR_ERR(tcp_ses->tsk); | |
f96637be | 2184 | cifs_dbg(VFS, "error %d create cifsd thread\n", rc); |
63c038c2 | 2185 | module_put(THIS_MODULE); |
f7c5445a | 2186 | goto out_err_crypto_release; |
63c038c2 | 2187 | } |
fd88ce93 | 2188 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
63c038c2 JL |
2189 | |
2190 | /* thread spawned, put it on the list */ | |
3f9bcca7 | 2191 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 2192 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 2193 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 2194 | |
488f1d2d SJ |
2195 | cifs_fscache_get_client_cookie(tcp_ses); |
2196 | ||
c74093b6 | 2197 | /* queue echo request delayed work */ |
adfeb3e0 | 2198 | queue_delayed_work(cifsiod_wq, &tcp_ses->echo, tcp_ses->echo_interval); |
c74093b6 | 2199 | |
63c038c2 JL |
2200 | return tcp_ses; |
2201 | ||
f7c5445a | 2202 | out_err_crypto_release: |
d2b91521 SP |
2203 | cifs_crypto_shash_release(tcp_ses); |
2204 | ||
f1d0c998 RL |
2205 | put_net(cifs_net_ns(tcp_ses)); |
2206 | ||
63c038c2 JL |
2207 | out_err: |
2208 | if (tcp_ses) { | |
8347a5cd SF |
2209 | if (!IS_ERR(tcp_ses->hostname)) |
2210 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
2211 | if (tcp_ses->ssocket) |
2212 | sock_release(tcp_ses->ssocket); | |
2213 | kfree(tcp_ses); | |
2214 | } | |
2215 | return ERR_PTR(rc); | |
2216 | } | |
2217 | ||
96daf2b0 | 2218 | static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
37bb04e5 | 2219 | { |
3f618223 JL |
2220 | if (vol->sectype != Unspecified && |
2221 | vol->sectype != ses->sectype) | |
2222 | return 0; | |
2223 | ||
2224 | switch (ses->sectype) { | |
37bb04e5 | 2225 | case Kerberos: |
64ed39dd | 2226 | if (!uid_eq(vol->cred_uid, ses->cred_uid)) |
37bb04e5 PS |
2227 | return 0; |
2228 | break; | |
2229 | default: | |
04febabc JL |
2230 | /* NULL username means anonymous session */ |
2231 | if (ses->user_name == NULL) { | |
2232 | if (!vol->nullauth) | |
2233 | return 0; | |
2234 | break; | |
2235 | } | |
2236 | ||
37bb04e5 | 2237 | /* anything else takes username/password */ |
04febabc JL |
2238 | if (strncmp(ses->user_name, |
2239 | vol->username ? vol->username : "", | |
8c3a2b4c | 2240 | CIFS_MAX_USERNAME_LEN)) |
37bb04e5 | 2241 | return 0; |
08b37d51 | 2242 | if ((vol->username && strlen(vol->username) != 0) && |
37bb04e5 PS |
2243 | ses->password != NULL && |
2244 | strncmp(ses->password, | |
2245 | vol->password ? vol->password : "", | |
8c3a2b4c | 2246 | CIFS_MAX_PASSWORD_LEN)) |
37bb04e5 PS |
2247 | return 0; |
2248 | } | |
2249 | return 1; | |
2250 | } | |
2251 | ||
96daf2b0 | 2252 | static struct cifs_ses * |
4ff67b72 | 2253 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 2254 | { |
96daf2b0 | 2255 | struct cifs_ses *ses; |
dea570e0 | 2256 | |
3f9bcca7 | 2257 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 | 2258 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
7f48558e SP |
2259 | if (ses->status == CifsExiting) |
2260 | continue; | |
37bb04e5 PS |
2261 | if (!match_session(ses, vol)) |
2262 | continue; | |
14fbf50d | 2263 | ++ses->ses_count; |
3f9bcca7 | 2264 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2265 | return ses; |
2266 | } | |
3f9bcca7 | 2267 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2268 | return NULL; |
2269 | } | |
dea570e0 | 2270 | |
14fbf50d | 2271 | static void |
96daf2b0 | 2272 | cifs_put_smb_ses(struct cifs_ses *ses) |
14fbf50d | 2273 | { |
7f48558e | 2274 | unsigned int rc, xid; |
14fbf50d | 2275 | struct TCP_Server_Info *server = ses->server; |
dea570e0 | 2276 | |
f96637be | 2277 | cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count); |
7f48558e | 2278 | |
3f9bcca7 | 2279 | spin_lock(&cifs_tcp_ses_lock); |
7f48558e SP |
2280 | if (ses->status == CifsExiting) { |
2281 | spin_unlock(&cifs_tcp_ses_lock); | |
2282 | return; | |
2283 | } | |
14fbf50d | 2284 | if (--ses->ses_count > 0) { |
3f9bcca7 | 2285 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2286 | return; |
2287 | } | |
7f48558e SP |
2288 | if (ses->status == CifsGood) |
2289 | ses->status = CifsExiting; | |
3f9bcca7 | 2290 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2291 | |
7f48558e | 2292 | if (ses->status == CifsExiting && server->ops->logoff) { |
6d5786a3 | 2293 | xid = get_xid(); |
7f48558e SP |
2294 | rc = server->ops->logoff(xid, ses); |
2295 | if (rc) | |
2296 | cifs_dbg(VFS, "%s: Session Logoff failure rc=%d\n", | |
2297 | __func__, rc); | |
6d5786a3 | 2298 | _free_xid(xid); |
14fbf50d | 2299 | } |
7f48558e SP |
2300 | |
2301 | spin_lock(&cifs_tcp_ses_lock); | |
2302 | list_del_init(&ses->smb_ses_list); | |
2303 | spin_unlock(&cifs_tcp_ses_lock); | |
2304 | ||
14fbf50d JL |
2305 | sesInfoFree(ses); |
2306 | cifs_put_tcp_session(server); | |
2307 | } | |
dea570e0 | 2308 | |
8a8798a5 JL |
2309 | #ifdef CONFIG_KEYS |
2310 | ||
057d6332 CG |
2311 | /* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */ |
2312 | #define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1) | |
8a8798a5 JL |
2313 | |
2314 | /* Populate username and pw fields from keyring if possible */ | |
2315 | static int | |
2316 | cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) | |
2317 | { | |
2318 | int rc = 0; | |
146aa8b1 DH |
2319 | const char *delim, *payload; |
2320 | char *desc; | |
8a8798a5 JL |
2321 | ssize_t len; |
2322 | struct key *key; | |
2323 | struct TCP_Server_Info *server = ses->server; | |
2324 | struct sockaddr_in *sa; | |
2325 | struct sockaddr_in6 *sa6; | |
146aa8b1 | 2326 | const struct user_key_payload *upayload; |
8a8798a5 JL |
2327 | |
2328 | desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL); | |
2329 | if (!desc) | |
2330 | return -ENOMEM; | |
2331 | ||
2332 | /* try to find an address key first */ | |
2333 | switch (server->dstaddr.ss_family) { | |
2334 | case AF_INET: | |
2335 | sa = (struct sockaddr_in *)&server->dstaddr; | |
2336 | sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr); | |
2337 | break; | |
2338 | case AF_INET6: | |
2339 | sa6 = (struct sockaddr_in6 *)&server->dstaddr; | |
2340 | sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr); | |
2341 | break; | |
2342 | default: | |
f96637be JP |
2343 | cifs_dbg(FYI, "Bad ss_family (%hu)\n", |
2344 | server->dstaddr.ss_family); | |
8a8798a5 JL |
2345 | rc = -EINVAL; |
2346 | goto out_err; | |
2347 | } | |
2348 | ||
f96637be | 2349 | cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
8a8798a5 JL |
2350 | key = request_key(&key_type_logon, desc, ""); |
2351 | if (IS_ERR(key)) { | |
2352 | if (!ses->domainName) { | |
f96637be | 2353 | cifs_dbg(FYI, "domainName is NULL\n"); |
8a8798a5 JL |
2354 | rc = PTR_ERR(key); |
2355 | goto out_err; | |
2356 | } | |
2357 | ||
2358 | /* didn't work, try to find a domain key */ | |
2359 | sprintf(desc, "cifs:d:%s", ses->domainName); | |
f96637be | 2360 | cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
8a8798a5 JL |
2361 | key = request_key(&key_type_logon, desc, ""); |
2362 | if (IS_ERR(key)) { | |
2363 | rc = PTR_ERR(key); | |
2364 | goto out_err; | |
2365 | } | |
2366 | } | |
2367 | ||
2368 | down_read(&key->sem); | |
146aa8b1 | 2369 | upayload = user_key_payload(key); |
8a8798a5 | 2370 | if (IS_ERR_OR_NULL(upayload)) { |
4edc53c1 | 2371 | rc = upayload ? PTR_ERR(upayload) : -EINVAL; |
8a8798a5 JL |
2372 | goto out_key_put; |
2373 | } | |
2374 | ||
2375 | /* find first : in payload */ | |
146aa8b1 | 2376 | payload = upayload->data; |
8a8798a5 | 2377 | delim = strnchr(payload, upayload->datalen, ':'); |
f96637be | 2378 | cifs_dbg(FYI, "payload=%s\n", payload); |
8a8798a5 | 2379 | if (!delim) { |
f96637be JP |
2380 | cifs_dbg(FYI, "Unable to find ':' in payload (datalen=%d)\n", |
2381 | upayload->datalen); | |
8a8798a5 JL |
2382 | rc = -EINVAL; |
2383 | goto out_key_put; | |
2384 | } | |
2385 | ||
2386 | len = delim - payload; | |
8c3a2b4c | 2387 | if (len > CIFS_MAX_USERNAME_LEN || len <= 0) { |
f96637be JP |
2388 | cifs_dbg(FYI, "Bad value from username search (len=%zd)\n", |
2389 | len); | |
8a8798a5 JL |
2390 | rc = -EINVAL; |
2391 | goto out_key_put; | |
2392 | } | |
2393 | ||
2394 | vol->username = kstrndup(payload, len, GFP_KERNEL); | |
2395 | if (!vol->username) { | |
f96637be JP |
2396 | cifs_dbg(FYI, "Unable to allocate %zd bytes for username\n", |
2397 | len); | |
8a8798a5 JL |
2398 | rc = -ENOMEM; |
2399 | goto out_key_put; | |
2400 | } | |
f96637be | 2401 | cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username); |
8a8798a5 JL |
2402 | |
2403 | len = key->datalen - (len + 1); | |
8c3a2b4c | 2404 | if (len > CIFS_MAX_PASSWORD_LEN || len <= 0) { |
f96637be | 2405 | cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len); |
8a8798a5 JL |
2406 | rc = -EINVAL; |
2407 | kfree(vol->username); | |
2408 | vol->username = NULL; | |
2409 | goto out_key_put; | |
2410 | } | |
2411 | ||
2412 | ++delim; | |
2413 | vol->password = kstrndup(delim, len, GFP_KERNEL); | |
2414 | if (!vol->password) { | |
f96637be JP |
2415 | cifs_dbg(FYI, "Unable to allocate %zd bytes for password\n", |
2416 | len); | |
8a8798a5 JL |
2417 | rc = -ENOMEM; |
2418 | kfree(vol->username); | |
2419 | vol->username = NULL; | |
2420 | goto out_key_put; | |
2421 | } | |
2422 | ||
2423 | out_key_put: | |
2424 | up_read(&key->sem); | |
2425 | key_put(key); | |
2426 | out_err: | |
2427 | kfree(desc); | |
f96637be | 2428 | cifs_dbg(FYI, "%s: returning %d\n", __func__, rc); |
8a8798a5 JL |
2429 | return rc; |
2430 | } | |
2431 | #else /* ! CONFIG_KEYS */ | |
2432 | static inline int | |
2433 | cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), | |
2434 | struct cifs_ses *ses __attribute__((unused))) | |
2435 | { | |
2436 | return -ENOSYS; | |
2437 | } | |
2438 | #endif /* CONFIG_KEYS */ | |
2439 | ||
96daf2b0 | 2440 | static struct cifs_ses * |
36988c76 JL |
2441 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
2442 | { | |
286170aa PS |
2443 | int rc = -ENOMEM; |
2444 | unsigned int xid; | |
96daf2b0 | 2445 | struct cifs_ses *ses; |
a9f1b85e PS |
2446 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
2447 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 | 2448 | |
6d5786a3 | 2449 | xid = get_xid(); |
36988c76 | 2450 | |
4ff67b72 | 2451 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 | 2452 | if (ses) { |
f96637be JP |
2453 | cifs_dbg(FYI, "Existing smb sess found (status=%d)\n", |
2454 | ses->status); | |
36988c76 | 2455 | |
36988c76 | 2456 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
2457 | rc = cifs_negotiate_protocol(xid, ses); |
2458 | if (rc) { | |
2459 | mutex_unlock(&ses->session_mutex); | |
2460 | /* problem -- put our ses reference */ | |
2461 | cifs_put_smb_ses(ses); | |
6d5786a3 | 2462 | free_xid(xid); |
198b5682 JL |
2463 | return ERR_PTR(rc); |
2464 | } | |
36988c76 | 2465 | if (ses->need_reconnect) { |
f96637be | 2466 | cifs_dbg(FYI, "Session needs reconnect\n"); |
36988c76 JL |
2467 | rc = cifs_setup_session(xid, ses, |
2468 | volume_info->local_nls); | |
2469 | if (rc) { | |
2470 | mutex_unlock(&ses->session_mutex); | |
2471 | /* problem -- put our reference */ | |
2472 | cifs_put_smb_ses(ses); | |
6d5786a3 | 2473 | free_xid(xid); |
36988c76 JL |
2474 | return ERR_PTR(rc); |
2475 | } | |
2476 | } | |
2477 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
2478 | |
2479 | /* existing SMB ses has a server reference already */ | |
2480 | cifs_put_tcp_session(server); | |
6d5786a3 | 2481 | free_xid(xid); |
36988c76 JL |
2482 | return ses; |
2483 | } | |
2484 | ||
f96637be | 2485 | cifs_dbg(FYI, "Existing smb sess not found\n"); |
36988c76 JL |
2486 | ses = sesInfoAlloc(); |
2487 | if (ses == NULL) | |
2488 | goto get_ses_fail; | |
2489 | ||
2490 | /* new SMB session uses our server ref */ | |
2491 | ses->server = server; | |
a9f1b85e PS |
2492 | if (server->dstaddr.ss_family == AF_INET6) |
2493 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 2494 | else |
a9f1b85e | 2495 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 2496 | |
8727c8a8 SF |
2497 | if (volume_info->username) { |
2498 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
2499 | if (!ses->user_name) | |
2500 | goto get_ses_fail; | |
2501 | } | |
36988c76 JL |
2502 | |
2503 | /* volume_info->password freed at unmount */ | |
2504 | if (volume_info->password) { | |
2505 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2506 | if (!ses->password) | |
2507 | goto get_ses_fail; | |
2508 | } | |
2509 | if (volume_info->domainname) { | |
d3686d54 SP |
2510 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
2511 | if (!ses->domainName) | |
2512 | goto get_ses_fail; | |
36988c76 | 2513 | } |
3e4b3e1f | 2514 | ses->cred_uid = volume_info->cred_uid; |
36988c76 | 2515 | ses->linux_uid = volume_info->linux_uid; |
d9b94201 | 2516 | |
28e11bd8 JL |
2517 | ses->sectype = volume_info->sectype; |
2518 | ses->sign = volume_info->sign; | |
36988c76 JL |
2519 | |
2520 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
2521 | rc = cifs_negotiate_protocol(xid, ses); |
2522 | if (!rc) | |
2523 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 2524 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 2525 | if (rc) |
36988c76 JL |
2526 | goto get_ses_fail; |
2527 | ||
2528 | /* success, put it on the list */ | |
3f9bcca7 | 2529 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 2530 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 2531 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 | 2532 | |
6d5786a3 | 2533 | free_xid(xid); |
36988c76 JL |
2534 | return ses; |
2535 | ||
2536 | get_ses_fail: | |
2537 | sesInfoFree(ses); | |
6d5786a3 | 2538 | free_xid(xid); |
36988c76 JL |
2539 | return ERR_PTR(rc); |
2540 | } | |
2541 | ||
96daf2b0 | 2542 | static int match_tcon(struct cifs_tcon *tcon, const char *unc) |
37bb04e5 PS |
2543 | { |
2544 | if (tcon->tidStatus == CifsExiting) | |
2545 | return 0; | |
2546 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) | |
2547 | return 0; | |
2548 | return 1; | |
2549 | } | |
2550 | ||
96daf2b0 SF |
2551 | static struct cifs_tcon * |
2552 | cifs_find_tcon(struct cifs_ses *ses, const char *unc) | |
f1987b44 JL |
2553 | { |
2554 | struct list_head *tmp; | |
96daf2b0 | 2555 | struct cifs_tcon *tcon; |
f1987b44 | 2556 | |
3f9bcca7 | 2557 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2558 | list_for_each(tmp, &ses->tcon_list) { |
96daf2b0 | 2559 | tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
37bb04e5 | 2560 | if (!match_tcon(tcon, unc)) |
f1987b44 | 2561 | continue; |
f1987b44 | 2562 | ++tcon->tc_count; |
3f9bcca7 | 2563 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2564 | return tcon; |
1da177e4 | 2565 | } |
3f9bcca7 | 2566 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2567 | return NULL; |
2568 | } | |
2569 | ||
f1987b44 | 2570 | static void |
96daf2b0 | 2571 | cifs_put_tcon(struct cifs_tcon *tcon) |
f1987b44 | 2572 | { |
2e6e02ab | 2573 | unsigned int xid; |
96daf2b0 | 2574 | struct cifs_ses *ses = tcon->ses; |
f1987b44 | 2575 | |
f96637be | 2576 | cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
3f9bcca7 | 2577 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2578 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 2579 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2580 | return; |
2581 | } | |
2582 | ||
2583 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 2584 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 | 2585 | |
6d5786a3 | 2586 | xid = get_xid(); |
2e6e02ab PS |
2587 | if (ses->server->ops->tree_disconnect) |
2588 | ses->server->ops->tree_disconnect(xid, tcon); | |
6d5786a3 | 2589 | _free_xid(xid); |
f1987b44 | 2590 | |
d03382ce | 2591 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 2592 | tconInfoFree(tcon); |
f1987b44 JL |
2593 | cifs_put_smb_ses(ses); |
2594 | } | |
2595 | ||
96daf2b0 SF |
2596 | static struct cifs_tcon * |
2597 | cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) | |
d00c28de JL |
2598 | { |
2599 | int rc, xid; | |
96daf2b0 | 2600 | struct cifs_tcon *tcon; |
d00c28de JL |
2601 | |
2602 | tcon = cifs_find_tcon(ses, volume_info->UNC); | |
2603 | if (tcon) { | |
f96637be | 2604 | cifs_dbg(FYI, "Found match on UNC path\n"); |
d00c28de JL |
2605 | /* existing tcon already has a reference */ |
2606 | cifs_put_smb_ses(ses); | |
2607 | if (tcon->seal != volume_info->seal) | |
f96637be | 2608 | cifs_dbg(VFS, "transport encryption setting conflicts with existing tid\n"); |
d00c28de JL |
2609 | return tcon; |
2610 | } | |
2611 | ||
2e6e02ab PS |
2612 | if (!ses->server->ops->tree_connect) { |
2613 | rc = -ENOSYS; | |
2614 | goto out_fail; | |
2615 | } | |
2616 | ||
d00c28de JL |
2617 | tcon = tconInfoAlloc(); |
2618 | if (tcon == NULL) { | |
2619 | rc = -ENOMEM; | |
2620 | goto out_fail; | |
2621 | } | |
2622 | ||
2623 | tcon->ses = ses; | |
2624 | if (volume_info->password) { | |
2625 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2626 | if (!tcon->password) { | |
2627 | rc = -ENOMEM; | |
2628 | goto out_fail; | |
2629 | } | |
2630 | } | |
2631 | ||
2e6e02ab PS |
2632 | /* |
2633 | * BB Do we need to wrap session_mutex around this TCon call and Unix | |
2634 | * SetFS as we do on SessSetup and reconnect? | |
2635 | */ | |
6d5786a3 | 2636 | xid = get_xid(); |
2e6e02ab PS |
2637 | rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon, |
2638 | volume_info->local_nls); | |
6d5786a3 | 2639 | free_xid(xid); |
f96637be | 2640 | cifs_dbg(FYI, "Tcon rc = %d\n", rc); |
d00c28de JL |
2641 | if (rc) |
2642 | goto out_fail; | |
2643 | ||
2644 | if (volume_info->nodfs) { | |
2645 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
f96637be | 2646 | cifs_dbg(FYI, "DFS disabled (%d)\n", tcon->Flags); |
d00c28de JL |
2647 | } |
2648 | tcon->seal = volume_info->seal; | |
b618f001 SF |
2649 | tcon->use_persistent = false; |
2650 | /* check if SMB2 or later, CIFS does not support persistent handles */ | |
2651 | if (volume_info->persistent) { | |
2652 | if (ses->server->vals->protocol_id == 0) { | |
2653 | cifs_dbg(VFS, | |
2654 | "SMB3 or later required for persistent handles\n"); | |
2655 | rc = -EOPNOTSUPP; | |
2656 | goto out_fail; | |
592fafe6 | 2657 | #ifdef CONFIG_CIFS_SMB2 |
b618f001 SF |
2658 | } else if (ses->server->capabilities & |
2659 | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) | |
2660 | tcon->use_persistent = true; | |
2661 | else /* persistent handles requested but not supported */ { | |
2662 | cifs_dbg(VFS, | |
2663 | "Persistent handles not supported on share\n"); | |
2664 | rc = -EOPNOTSUPP; | |
2665 | goto out_fail; | |
592fafe6 | 2666 | #endif /* CONFIG_CIFS_SMB2 */ |
b618f001 | 2667 | } |
592fafe6 | 2668 | #ifdef CONFIG_CIFS_SMB2 |
b618f001 SF |
2669 | } else if ((tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) |
2670 | && (ses->server->capabilities & SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) | |
2671 | && (volume_info->nopersistent == false)) { | |
2672 | cifs_dbg(FYI, "enabling persistent handles\n"); | |
2673 | tcon->use_persistent = true; | |
592fafe6 SF |
2674 | #endif /* CONFIG_CIFS_SMB2 */ |
2675 | } else if (volume_info->resilient) { | |
2676 | if (ses->server->vals->protocol_id == 0) { | |
2677 | cifs_dbg(VFS, | |
2678 | "SMB2.1 or later required for resilient handles\n"); | |
2679 | rc = -EOPNOTSUPP; | |
2680 | goto out_fail; | |
2681 | } | |
2682 | tcon->use_resilient = true; | |
b618f001 SF |
2683 | } |
2684 | ||
2e6e02ab PS |
2685 | /* |
2686 | * We can have only one retry value for a connection to a share so for | |
2687 | * resources mounted more than once to the same server share the last | |
2688 | * value passed in for the retry flag is used. | |
2689 | */ | |
d00c28de JL |
2690 | tcon->retry = volume_info->retry; |
2691 | tcon->nocase = volume_info->nocase; | |
2692 | tcon->local_lease = volume_info->local_lease; | |
233839b1 | 2693 | INIT_LIST_HEAD(&tcon->pending_opens); |
d00c28de | 2694 | |
3f9bcca7 | 2695 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 2696 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 2697 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 2698 | |
d03382ce SJ |
2699 | cifs_fscache_get_super_cookie(tcon); |
2700 | ||
d00c28de JL |
2701 | return tcon; |
2702 | ||
2703 | out_fail: | |
2704 | tconInfoFree(tcon); | |
2705 | return ERR_PTR(rc); | |
2706 | } | |
2707 | ||
9d002df4 JL |
2708 | void |
2709 | cifs_put_tlink(struct tcon_link *tlink) | |
2710 | { | |
2711 | if (!tlink || IS_ERR(tlink)) | |
2712 | return; | |
2713 | ||
2714 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
2715 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
2716 | tlink->tl_time = jiffies; | |
2717 | return; | |
2718 | } | |
2719 | ||
2720 | if (!IS_ERR(tlink_tcon(tlink))) | |
2721 | cifs_put_tcon(tlink_tcon(tlink)); | |
2722 | kfree(tlink); | |
2723 | return; | |
2724 | } | |
d00c28de | 2725 | |
25c7f41e | 2726 | static inline struct tcon_link * |
cd51875d PS |
2727 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
2728 | { | |
2729 | return cifs_sb->master_tlink; | |
2730 | } | |
25c7f41e PS |
2731 | |
2732 | static int | |
2733 | compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
2734 | { | |
2735 | struct cifs_sb_info *old = CIFS_SB(sb); | |
2736 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
2737 | ||
2738 | if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) | |
2739 | return 0; | |
2740 | ||
2741 | if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) != | |
2742 | (new->mnt_cifs_flags & CIFS_MOUNT_MASK)) | |
2743 | return 0; | |
2744 | ||
25c7f41e | 2745 | /* |
5eba8ab3 JL |
2746 | * We want to share sb only if we don't specify an r/wsize or |
2747 | * specified r/wsize is greater than or equal to existing one. | |
25c7f41e PS |
2748 | */ |
2749 | if (new->wsize && new->wsize < old->wsize) | |
2750 | return 0; | |
2751 | ||
5eba8ab3 JL |
2752 | if (new->rsize && new->rsize < old->rsize) |
2753 | return 0; | |
2754 | ||
1f68233c | 2755 | if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid)) |
25c7f41e PS |
2756 | return 0; |
2757 | ||
2758 | if (old->mnt_file_mode != new->mnt_file_mode || | |
2759 | old->mnt_dir_mode != new->mnt_dir_mode) | |
2760 | return 0; | |
2761 | ||
2762 | if (strcmp(old->local_nls->charset, new->local_nls->charset)) | |
2763 | return 0; | |
2764 | ||
2765 | if (old->actimeo != new->actimeo) | |
2766 | return 0; | |
2767 | ||
2768 | return 1; | |
2769 | } | |
2770 | ||
2771 | int | |
2772 | cifs_match_super(struct super_block *sb, void *data) | |
2773 | { | |
2774 | struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; | |
2775 | struct smb_vol *volume_info; | |
2776 | struct cifs_sb_info *cifs_sb; | |
2777 | struct TCP_Server_Info *tcp_srv; | |
96daf2b0 SF |
2778 | struct cifs_ses *ses; |
2779 | struct cifs_tcon *tcon; | |
25c7f41e | 2780 | struct tcon_link *tlink; |
25c7f41e PS |
2781 | int rc = 0; |
2782 | ||
25c7f41e PS |
2783 | spin_lock(&cifs_tcp_ses_lock); |
2784 | cifs_sb = CIFS_SB(sb); | |
2785 | tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
2786 | if (IS_ERR(tlink)) { | |
2787 | spin_unlock(&cifs_tcp_ses_lock); | |
2788 | return rc; | |
2789 | } | |
2790 | tcon = tlink_tcon(tlink); | |
2791 | ses = tcon->ses; | |
2792 | tcp_srv = ses->server; | |
2793 | ||
2794 | volume_info = mnt_data->vol; | |
2795 | ||
9fa114f7 | 2796 | if (!match_server(tcp_srv, volume_info) || |
25c7f41e PS |
2797 | !match_session(ses, volume_info) || |
2798 | !match_tcon(tcon, volume_info->UNC)) { | |
2799 | rc = 0; | |
2800 | goto out; | |
2801 | } | |
2802 | ||
2803 | rc = compare_mount_options(sb, mnt_data); | |
2804 | out: | |
25c7f41e | 2805 | spin_unlock(&cifs_tcp_ses_lock); |
f484b5d0 | 2806 | cifs_put_tlink(tlink); |
25c7f41e PS |
2807 | return rc; |
2808 | } | |
2809 | ||
1da177e4 | 2810 | int |
b669f33c | 2811 | get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path, |
2e6e02ab PS |
2812 | const struct nls_table *nls_codepage, unsigned int *num_referrals, |
2813 | struct dfs_info3_param **referrals, int remap) | |
1da177e4 LT |
2814 | { |
2815 | char *temp_unc; | |
2816 | int rc = 0; | |
2817 | ||
b669f33c | 2818 | if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer) |
2e6e02ab PS |
2819 | return -ENOSYS; |
2820 | ||
2821 | *num_referrals = 0; | |
2822 | *referrals = NULL; | |
1da177e4 | 2823 | |
2e6e02ab | 2824 | if (ses->ipc_tid == 0) { |
1da177e4 | 2825 | temp_unc = kmalloc(2 /* for slashes */ + |
2e6e02ab PS |
2826 | strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2) |
2827 | + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL); | |
1da177e4 LT |
2828 | if (temp_unc == NULL) |
2829 | return -ENOMEM; | |
2830 | temp_unc[0] = '\\'; | |
2831 | temp_unc[1] = '\\'; | |
2e6e02ab PS |
2832 | strcpy(temp_unc + 2, ses->serverName); |
2833 | strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$"); | |
2834 | rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL, | |
2835 | nls_codepage); | |
f96637be | 2836 | cifs_dbg(FYI, "Tcon rc = %d ipc_tid = %d\n", rc, ses->ipc_tid); |
1da177e4 LT |
2837 | kfree(temp_unc); |
2838 | } | |
2839 | if (rc == 0) | |
b669f33c PS |
2840 | rc = ses->server->ops->get_dfs_refer(xid, ses, old_path, |
2841 | referrals, num_referrals, | |
2842 | nls_codepage, remap); | |
2e6e02ab PS |
2843 | /* |
2844 | * BB - map targetUNCs to dfs_info3 structures, here or in | |
b669f33c | 2845 | * ses->server->ops->get_dfs_refer. |
2e6e02ab | 2846 | */ |
1da177e4 LT |
2847 | |
2848 | return rc; | |
2849 | } | |
2850 | ||
09e50d55 JL |
2851 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
2852 | static struct lock_class_key cifs_key[2]; | |
2853 | static struct lock_class_key cifs_slock_key[2]; | |
2854 | ||
2855 | static inline void | |
2856 | cifs_reclassify_socket4(struct socket *sock) | |
2857 | { | |
2858 | struct sock *sk = sock->sk; | |
2859 | BUG_ON(sock_owned_by_user(sk)); | |
2860 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", | |
2861 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
2862 | } | |
2863 | ||
2864 | static inline void | |
2865 | cifs_reclassify_socket6(struct socket *sock) | |
2866 | { | |
2867 | struct sock *sk = sock->sk; | |
2868 | BUG_ON(sock_owned_by_user(sk)); | |
2869 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", | |
2870 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
2871 | } | |
2872 | #else | |
2873 | static inline void | |
2874 | cifs_reclassify_socket4(struct socket *sock) | |
2875 | { | |
2876 | } | |
2877 | ||
2878 | static inline void | |
2879 | cifs_reclassify_socket6(struct socket *sock) | |
2880 | { | |
2881 | } | |
2882 | #endif | |
2883 | ||
1da177e4 | 2884 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 2885 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 2886 | { |
50c2f753 | 2887 | unsigned int i, j; |
1da177e4 | 2888 | |
50c2f753 | 2889 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
2890 | /* mask a nibble at a time and encode */ |
2891 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
2892 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 2893 | j += 2; |
1da177e4 LT |
2894 | } |
2895 | ||
2896 | } | |
2897 | ||
3eb9a889 BG |
2898 | static int |
2899 | bind_socket(struct TCP_Server_Info *server) | |
2900 | { | |
2901 | int rc = 0; | |
2902 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
2903 | /* Bind to the specified local IP address */ | |
2904 | struct socket *socket = server->ssocket; | |
2905 | rc = socket->ops->bind(socket, | |
2906 | (struct sockaddr *) &server->srcaddr, | |
2907 | sizeof(server->srcaddr)); | |
2908 | if (rc < 0) { | |
2909 | struct sockaddr_in *saddr4; | |
2910 | struct sockaddr_in6 *saddr6; | |
2911 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
2912 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
2913 | if (saddr6->sin6_family == AF_INET6) | |
f96637be JP |
2914 | cifs_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n", |
2915 | &saddr6->sin6_addr, rc); | |
3eb9a889 | 2916 | else |
f96637be JP |
2917 | cifs_dbg(VFS, "Failed to bind to: %pI4, error: %d\n", |
2918 | &saddr4->sin_addr.s_addr, rc); | |
3eb9a889 BG |
2919 | } |
2920 | } | |
2921 | return rc; | |
2922 | } | |
1da177e4 LT |
2923 | |
2924 | static int | |
a9f1b85e | 2925 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
2926 | { |
2927 | int rc = 0; | |
a9f1b85e PS |
2928 | /* |
2929 | * some servers require RFC1001 sessinit before sending | |
2930 | * negprot - BB check reconnection in case where second | |
2931 | * sessinit is sent but no second negprot | |
2932 | */ | |
2933 | struct rfc1002_session_packet *ses_init_buf; | |
2934 | struct smb_hdr *smb_buf; | |
2935 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
2936 | GFP_KERNEL); | |
2937 | if (ses_init_buf) { | |
2938 | ses_init_buf->trailer.session_req.called_len = 32; | |
2939 | ||
997152f6 | 2940 | if (server->server_RFC1001_name[0] != 0) |
a9f1b85e PS |
2941 | rfc1002mangle(ses_init_buf->trailer. |
2942 | session_req.called_name, | |
2943 | server->server_RFC1001_name, | |
2944 | RFC1001_NAME_LEN_WITH_NULL); | |
2945 | else | |
2946 | rfc1002mangle(ses_init_buf->trailer. | |
2947 | session_req.called_name, | |
2948 | DEFAULT_CIFS_CALLED_NAME, | |
2949 | RFC1001_NAME_LEN_WITH_NULL); | |
2950 | ||
2951 | ses_init_buf->trailer.session_req.calling_len = 32; | |
2952 | ||
2953 | /* | |
2954 | * calling name ends in null (byte 16) from old smb | |
2955 | * convention. | |
2956 | */ | |
c85c35f8 | 2957 | if (server->workstation_RFC1001_name[0] != 0) |
a9f1b85e PS |
2958 | rfc1002mangle(ses_init_buf->trailer. |
2959 | session_req.calling_name, | |
2960 | server->workstation_RFC1001_name, | |
2961 | RFC1001_NAME_LEN_WITH_NULL); | |
2962 | else | |
2963 | rfc1002mangle(ses_init_buf->trailer. | |
2964 | session_req.calling_name, | |
2965 | "LINUX_CIFS_CLNT", | |
2966 | RFC1001_NAME_LEN_WITH_NULL); | |
2967 | ||
2968 | ses_init_buf->trailer.session_req.scope1 = 0; | |
2969 | ses_init_buf->trailer.session_req.scope2 = 0; | |
2970 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
2971 | ||
2972 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
be8e3b00 | 2973 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
a9f1b85e PS |
2974 | rc = smb_send(server, smb_buf, 0x44); |
2975 | kfree(ses_init_buf); | |
2976 | /* | |
2977 | * RFC1001 layer in at least one server | |
2978 | * requires very short break before negprot | |
2979 | * presumably because not expecting negprot | |
2980 | * to follow so fast. This is a simple | |
2981 | * solution that works without | |
2982 | * complicating the code and causes no | |
2983 | * significant slowing down on mount | |
2984 | * for everyone else | |
2985 | */ | |
2986 | usleep_range(1000, 2000); | |
2987 | } | |
2988 | /* | |
2989 | * else the negprot may still work without this | |
2990 | * even though malloc failed | |
2991 | */ | |
2992 | ||
2993 | return rc; | |
2994 | } | |
2995 | ||
2996 | static int | |
2997 | generic_ip_connect(struct TCP_Server_Info *server) | |
2998 | { | |
2999 | int rc = 0; | |
6da97910 | 3000 | __be16 sport; |
a9f1b85e | 3001 | int slen, sfamily; |
bcf4b106 | 3002 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
3003 | struct sockaddr *saddr; |
3004 | ||
3005 | saddr = (struct sockaddr *) &server->dstaddr; | |
3006 | ||
3007 | if (server->dstaddr.ss_family == AF_INET6) { | |
3008 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
3009 | slen = sizeof(struct sockaddr_in6); | |
3010 | sfamily = AF_INET6; | |
3011 | } else { | |
3012 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
3013 | slen = sizeof(struct sockaddr_in); | |
3014 | sfamily = AF_INET; | |
3015 | } | |
1da177e4 | 3016 | |
bcf4b106 | 3017 | if (socket == NULL) { |
f1d0c998 RL |
3018 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
3019 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 3020 | if (rc < 0) { |
f96637be | 3021 | cifs_dbg(VFS, "Error %d creating socket\n", rc); |
a9f1b85e | 3022 | server->ssocket = NULL; |
1da177e4 | 3023 | return rc; |
1da177e4 | 3024 | } |
bcf4b106 JL |
3025 | |
3026 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
f96637be | 3027 | cifs_dbg(FYI, "Socket created\n"); |
bcf4b106 JL |
3028 | server->ssocket = socket; |
3029 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
3030 | if (sfamily == AF_INET6) |
3031 | cifs_reclassify_socket6(socket); | |
3032 | else | |
3033 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
3034 | } |
3035 | ||
3eb9a889 BG |
3036 | rc = bind_socket(server); |
3037 | if (rc < 0) | |
3038 | return rc; | |
3039 | ||
bcf4b106 JL |
3040 | /* |
3041 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
3042 | * the default. sock_setsockopt not used because it expects |
3043 | * user space buffer | |
bcf4b106 JL |
3044 | */ |
3045 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 3046 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 3047 | |
b387eaeb | 3048 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
3049 | if (server->noautotune) { |
3050 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
3051 | socket->sk->sk_sndbuf = 200 * 1024; | |
3052 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
3053 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 3054 | } |
1da177e4 | 3055 | |
6a5fa236 | 3056 | if (server->tcp_nodelay) { |
a9f1b85e | 3057 | int val = 1; |
6a5fa236 SF |
3058 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
3059 | (char *)&val, sizeof(val)); | |
3060 | if (rc) | |
f96637be JP |
3061 | cifs_dbg(FYI, "set TCP_NODELAY socket option error %d\n", |
3062 | rc); | |
6a5fa236 SF |
3063 | } |
3064 | ||
f96637be | 3065 | cifs_dbg(FYI, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n", |
bcf4b106 | 3066 | socket->sk->sk_sndbuf, |
b6b38f70 | 3067 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 3068 | |
ee1b3ea9 JL |
3069 | rc = socket->ops->connect(socket, saddr, slen, 0); |
3070 | if (rc < 0) { | |
f96637be | 3071 | cifs_dbg(FYI, "Error %d connecting to server\n", rc); |
ee1b3ea9 JL |
3072 | sock_release(socket); |
3073 | server->ssocket = NULL; | |
3074 | return rc; | |
3075 | } | |
3076 | ||
a9f1b85e PS |
3077 | if (sport == htons(RFC1001_PORT)) |
3078 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 3079 | |
1da177e4 LT |
3080 | return rc; |
3081 | } | |
3082 | ||
3083 | static int | |
a9f1b85e | 3084 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 3085 | { |
6da97910 | 3086 | __be16 *sport; |
a9f1b85e PS |
3087 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
3088 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 3089 | |
a9f1b85e PS |
3090 | if (server->dstaddr.ss_family == AF_INET6) |
3091 | sport = &addr6->sin6_port; | |
3092 | else | |
3093 | sport = &addr->sin_port; | |
1da177e4 | 3094 | |
a9f1b85e PS |
3095 | if (*sport == 0) { |
3096 | int rc; | |
1da177e4 | 3097 | |
a9f1b85e PS |
3098 | /* try with 445 port at first */ |
3099 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 3100 | |
a9f1b85e | 3101 | rc = generic_ip_connect(server); |
1da177e4 | 3102 | if (rc >= 0) |
a9f1b85e | 3103 | return rc; |
6a5fa236 | 3104 | |
a9f1b85e PS |
3105 | /* if it failed, try with 139 port */ |
3106 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
3107 | } |
3108 | ||
a9f1b85e | 3109 | return generic_ip_connect(server); |
1da177e4 LT |
3110 | } |
3111 | ||
6d5786a3 | 3112 | void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon, |
2c6292ae | 3113 | struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) |
8af18971 SF |
3114 | { |
3115 | /* if we are reconnecting then should we check to see if | |
3116 | * any requested capabilities changed locally e.g. via | |
3117 | * remount but we can not do much about it here | |
3118 | * if they have (even if we could detect it by the following) | |
3119 | * Perhaps we could add a backpointer to array of sb from tcon | |
3120 | * or if we change to make all sb to same share the same | |
3121 | * sb as NFS - then we only have one backpointer to sb. | |
3122 | * What if we wanted to mount the server share twice once with | |
3123 | * and once without posixacls or posix paths? */ | |
3124 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 3125 | |
c18c842b SF |
3126 | if (vol_info && vol_info->no_linux_ext) { |
3127 | tcon->fsUnixInfo.Capability = 0; | |
3128 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
f96637be | 3129 | cifs_dbg(FYI, "Linux protocol extensions disabled\n"); |
c18c842b SF |
3130 | return; |
3131 | } else if (vol_info) | |
3132 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
3133 | ||
3134 | if (tcon->unix_ext == 0) { | |
f96637be | 3135 | cifs_dbg(FYI, "Unix extensions disabled so not set on reconnect\n"); |
c18c842b SF |
3136 | return; |
3137 | } | |
50c2f753 | 3138 | |
fb8c4b14 | 3139 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 3140 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
f96637be | 3141 | cifs_dbg(FYI, "unix caps which server supports %lld\n", cap); |
8af18971 SF |
3142 | /* check for reconnect case in which we do not |
3143 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 3144 | if (vol_info == NULL) { |
50c2f753 | 3145 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
3146 | originally at mount time */ |
3147 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
3148 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
3149 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
3150 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
f96637be | 3151 | cifs_dbg(VFS, "POSIXPATH support change\n"); |
8af18971 | 3152 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 3153 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
f96637be JP |
3154 | cifs_dbg(VFS, "possible reconnect error\n"); |
3155 | cifs_dbg(VFS, "server disabled POSIX path support\n"); | |
11b6d645 | 3156 | } |
8af18971 | 3157 | } |
50c2f753 | 3158 | |
6848b733 | 3159 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
f96637be | 3160 | cifs_dbg(VFS, "per-share encryption not supported yet\n"); |
6848b733 | 3161 | |
8af18971 | 3162 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 3163 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 3164 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 3165 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
f96637be | 3166 | cifs_dbg(FYI, "negotiated posix acl support\n"); |
2c6292ae AV |
3167 | if (cifs_sb) |
3168 | cifs_sb->mnt_cifs_flags |= | |
3169 | CIFS_MOUNT_POSIXACL; | |
8af18971 SF |
3170 | } |
3171 | ||
75865f8c | 3172 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 3173 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 3174 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
f96637be | 3175 | cifs_dbg(FYI, "negotiate posix pathnames\n"); |
2c6292ae AV |
3176 | if (cifs_sb) |
3177 | cifs_sb->mnt_cifs_flags |= | |
8af18971 SF |
3178 | CIFS_MOUNT_POSIX_PATHS; |
3179 | } | |
50c2f753 | 3180 | |
f96637be | 3181 | cifs_dbg(FYI, "Negotiate caps 0x%x\n", (int)cap); |
8af18971 | 3182 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 3183 | if (cap & CIFS_UNIX_FCNTL_CAP) |
f96637be | 3184 | cifs_dbg(FYI, "FCNTL cap\n"); |
75865f8c | 3185 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
f96637be | 3186 | cifs_dbg(FYI, "EXTATTR cap\n"); |
75865f8c | 3187 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
f96637be | 3188 | cifs_dbg(FYI, "POSIX path cap\n"); |
75865f8c | 3189 | if (cap & CIFS_UNIX_XATTR_CAP) |
f96637be | 3190 | cifs_dbg(FYI, "XATTR cap\n"); |
75865f8c | 3191 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
f96637be | 3192 | cifs_dbg(FYI, "POSIX ACL cap\n"); |
75865f8c | 3193 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
f96637be | 3194 | cifs_dbg(FYI, "very large read cap\n"); |
75865f8c | 3195 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
f96637be | 3196 | cifs_dbg(FYI, "very large write cap\n"); |
6848b733 | 3197 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
f96637be | 3198 | cifs_dbg(FYI, "transport encryption cap\n"); |
6848b733 | 3199 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
f96637be | 3200 | cifs_dbg(FYI, "mandatory transport encryption cap\n"); |
8af18971 SF |
3201 | #endif /* CIFS_DEBUG2 */ |
3202 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 3203 | if (vol_info == NULL) { |
f96637be | 3204 | cifs_dbg(FYI, "resetting capabilities failed\n"); |
442aa310 | 3205 | } else |
f96637be | 3206 | 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 | 3207 | |
8af18971 SF |
3208 | } |
3209 | } | |
3210 | } | |
3211 | ||
724d9f1c PS |
3212 | void cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
3213 | struct cifs_sb_info *cifs_sb) | |
b1c8d2b4 | 3214 | { |
2de970ff JL |
3215 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
3216 | ||
2ced6f69 AV |
3217 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
3218 | cifs_sb->tlink_tree = RB_ROOT; | |
3219 | ||
25c7f41e | 3220 | /* |
5eba8ab3 JL |
3221 | * Temporarily set r/wsize for matching superblock. If we end up using |
3222 | * new sb then client will later negotiate it downward if needed. | |
25c7f41e | 3223 | */ |
5eba8ab3 | 3224 | cifs_sb->rsize = pvolume_info->rsize; |
25c7f41e PS |
3225 | cifs_sb->wsize = pvolume_info->wsize; |
3226 | ||
3b795210 SF |
3227 | cifs_sb->mnt_uid = pvolume_info->linux_uid; |
3228 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
3229 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
3230 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
f96637be JP |
3231 | cifs_dbg(FYI, "file mode: 0x%hx dir mode: 0x%hx\n", |
3232 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); | |
3b795210 | 3233 | |
6d20e840 | 3234 | cifs_sb->actimeo = pvolume_info->actimeo; |
724d9f1c | 3235 | cifs_sb->local_nls = pvolume_info->local_nls; |
6d20e840 | 3236 | |
3b795210 SF |
3237 | if (pvolume_info->noperm) |
3238 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
3239 | if (pvolume_info->setuids) | |
3240 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
3241 | if (pvolume_info->server_ino) | |
3242 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
3243 | if (pvolume_info->remap) | |
2baa2682 SF |
3244 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SFM_CHR; |
3245 | if (pvolume_info->sfu_remap) | |
3b795210 SF |
3246 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; |
3247 | if (pvolume_info->no_xattr) | |
3248 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
3249 | if (pvolume_info->sfu_emul) | |
3250 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
3251 | if (pvolume_info->nobrl) | |
3252 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 3253 | if (pvolume_info->nostrictsync) |
4717bed6 | 3254 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
3255 | if (pvolume_info->mand_lock) |
3256 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
d4ffff1f PS |
3257 | if (pvolume_info->rwpidforward) |
3258 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; | |
3b795210 SF |
3259 | if (pvolume_info->cifs_acl) |
3260 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
3c7c87fd | 3261 | if (pvolume_info->backupuid_specified) { |
3d3ea8e6 | 3262 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; |
3c7c87fd SP |
3263 | cifs_sb->mnt_backupuid = pvolume_info->backupuid; |
3264 | } | |
3265 | if (pvolume_info->backupgid_specified) { | |
3d3ea8e6 | 3266 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; |
3c7c87fd SP |
3267 | cifs_sb->mnt_backupgid = pvolume_info->backupgid; |
3268 | } | |
3b795210 SF |
3269 | if (pvolume_info->override_uid) |
3270 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
3271 | if (pvolume_info->override_gid) | |
3272 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
3273 | if (pvolume_info->dynperm) | |
3274 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
3275 | if (pvolume_info->fsc) |
3276 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
3277 | if (pvolume_info->multiuser) |
3278 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
3279 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
3280 | if (pvolume_info->strict_io) |
3281 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 3282 | if (pvolume_info->direct_io) { |
f96637be | 3283 | cifs_dbg(FYI, "mounting share using direct i/o\n"); |
3b795210 SF |
3284 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
3285 | } | |
736a3320 SM |
3286 | if (pvolume_info->mfsymlinks) { |
3287 | if (pvolume_info->sfu_emul) { | |
db8b631d SF |
3288 | /* |
3289 | * Our SFU ("Services for Unix" emulation does not allow | |
3290 | * creating symlinks but does allow reading existing SFU | |
3291 | * symlinks (it does allow both creating and reading SFU | |
3292 | * style mknod and FIFOs though). When "mfsymlinks" and | |
3293 | * "sfu" are both enabled at the same time, it allows | |
3294 | * reading both types of symlinks, but will only create | |
3295 | * them with mfsymlinks format. This allows better | |
3296 | * Apple compatibility (probably better for Samba too) | |
3297 | * while still recognizing old Windows style symlinks. | |
3298 | */ | |
3299 | cifs_dbg(VFS, "mount options mfsymlinks and sfu both enabled\n"); | |
736a3320 | 3300 | } |
db8b631d | 3301 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; |
736a3320 | 3302 | } |
3b795210 SF |
3303 | |
3304 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
f96637be | 3305 | cifs_dbg(VFS, "mount option dynperm ignored if cifsacl mount option supported\n"); |
b1c8d2b4 JL |
3306 | } |
3307 | ||
b9bce2e9 JL |
3308 | static void |
3309 | cleanup_volume_info_contents(struct smb_vol *volume_info) | |
1bfe73c2 | 3310 | { |
b946845a | 3311 | kfree(volume_info->username); |
1bfe73c2 | 3312 | kzfree(volume_info->password); |
95c75454 | 3313 | kfree(volume_info->UNC); |
b946845a SF |
3314 | kfree(volume_info->domainname); |
3315 | kfree(volume_info->iocharset); | |
1bfe73c2 | 3316 | kfree(volume_info->prepath); |
b9bce2e9 JL |
3317 | } |
3318 | ||
3319 | void | |
3320 | cifs_cleanup_volume_info(struct smb_vol *volume_info) | |
3321 | { | |
3322 | if (!volume_info) | |
3323 | return; | |
3324 | cleanup_volume_info_contents(volume_info); | |
1bfe73c2 | 3325 | kfree(volume_info); |
1bfe73c2 IM |
3326 | } |
3327 | ||
b9bce2e9 | 3328 | |
2d6d589d | 3329 | #ifdef CONFIG_CIFS_DFS_UPCALL |
6d3ea7e4 SF |
3330 | /* |
3331 | * cifs_build_path_to_root returns full path to root when we do not have an | |
3332 | * exiting connection (tcon) | |
3333 | */ | |
1bfe73c2 | 3334 | static char * |
b2a0fa15 | 3335 | build_unc_path_to_root(const struct smb_vol *vol, |
1bfe73c2 IM |
3336 | const struct cifs_sb_info *cifs_sb) |
3337 | { | |
b2a0fa15 | 3338 | char *full_path, *pos; |
839db3d1 | 3339 | unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0; |
b2a0fa15 | 3340 | unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); |
1bfe73c2 | 3341 | |
b2a0fa15 | 3342 | full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); |
1bfe73c2 IM |
3343 | if (full_path == NULL) |
3344 | return ERR_PTR(-ENOMEM); | |
3345 | ||
b2a0fa15 JL |
3346 | strncpy(full_path, vol->UNC, unc_len); |
3347 | pos = full_path + unc_len; | |
3348 | ||
3349 | if (pplen) { | |
1fc29bac JL |
3350 | *pos = CIFS_DIR_SEP(cifs_sb); |
3351 | strncpy(pos + 1, vol->prepath, pplen); | |
b2a0fa15 JL |
3352 | pos += pplen; |
3353 | } | |
3354 | ||
3355 | *pos = '\0'; /* add trailing null */ | |
f87d39d9 | 3356 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
f96637be | 3357 | cifs_dbg(FYI, "%s: full_path=%s\n", __func__, full_path); |
1bfe73c2 IM |
3358 | return full_path; |
3359 | } | |
dd613945 SF |
3360 | |
3361 | /* | |
3362 | * Perform a dfs referral query for a share and (optionally) prefix | |
3363 | * | |
046462ab SF |
3364 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
3365 | * to a string containing updated options for the submount. Otherwise it | |
3366 | * will be left untouched. | |
dd613945 SF |
3367 | * |
3368 | * Returns the rc from get_dfs_path to the caller, which can be used to | |
3369 | * determine whether there were referrals. | |
3370 | */ | |
3371 | static int | |
b669f33c | 3372 | expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses, |
dd613945 | 3373 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, |
046462ab | 3374 | int check_prefix) |
dd613945 SF |
3375 | { |
3376 | int rc; | |
3377 | unsigned int num_referrals = 0; | |
3378 | struct dfs_info3_param *referrals = NULL; | |
3379 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; | |
3380 | ||
3381 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
3382 | if (IS_ERR(full_path)) | |
3383 | return PTR_ERR(full_path); | |
3384 | ||
3385 | /* For DFS paths, skip the first '\' of the UNC */ | |
3386 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; | |
3387 | ||
b669f33c | 3388 | rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls, |
2baa2682 | 3389 | &num_referrals, &referrals, cifs_remap(cifs_sb)); |
dd613945 SF |
3390 | |
3391 | if (!rc && num_referrals > 0) { | |
3392 | char *fake_devname = NULL; | |
3393 | ||
3394 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, | |
3395 | full_path + 1, referrals, | |
3396 | &fake_devname); | |
3397 | ||
3398 | free_dfs_info_array(referrals, num_referrals); | |
046462ab | 3399 | |
dd613945 SF |
3400 | if (IS_ERR(mdata)) { |
3401 | rc = PTR_ERR(mdata); | |
3402 | mdata = NULL; | |
b9bce2e9 JL |
3403 | } else { |
3404 | cleanup_volume_info_contents(volume_info); | |
b9bce2e9 JL |
3405 | rc = cifs_setup_volume_info(volume_info, mdata, |
3406 | fake_devname); | |
dd613945 | 3407 | } |
b9bce2e9 JL |
3408 | kfree(fake_devname); |
3409 | kfree(cifs_sb->mountdata); | |
046462ab | 3410 | cifs_sb->mountdata = mdata; |
dd613945 SF |
3411 | } |
3412 | kfree(full_path); | |
3413 | return rc; | |
3414 | } | |
2d6d589d | 3415 | #endif |
1bfe73c2 | 3416 | |
04db79b0 JL |
3417 | static int |
3418 | cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, | |
3419 | const char *devname) | |
1da177e4 | 3420 | { |
724d9f1c | 3421 | int rc = 0; |
1da177e4 | 3422 | |
04db79b0 JL |
3423 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) |
3424 | return -EINVAL; | |
1da177e4 | 3425 | |
7586b765 | 3426 | if (volume_info->nullauth) { |
f96637be | 3427 | cifs_dbg(FYI, "Anonymous login\n"); |
04febabc JL |
3428 | kfree(volume_info->username); |
3429 | volume_info->username = NULL; | |
7586b765 | 3430 | } else if (volume_info->username) { |
1da177e4 | 3431 | /* BB fixme parse for domain name here */ |
f96637be | 3432 | cifs_dbg(FYI, "Username: %s\n", volume_info->username); |
1da177e4 | 3433 | } else { |
f96637be | 3434 | cifs_dbg(VFS, "No username specified\n"); |
50c2f753 SF |
3435 | /* In userspace mount helper we can get user name from alternate |
3436 | locations such as env variables and files on disk */ | |
04db79b0 | 3437 | return -EINVAL; |
1da177e4 LT |
3438 | } |
3439 | ||
1da177e4 | 3440 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 3441 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
3442 | /* load_nls_default cannot return null */ |
3443 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 3444 | } else { |
a5fc4ce0 JL |
3445 | volume_info->local_nls = load_nls(volume_info->iocharset); |
3446 | if (volume_info->local_nls == NULL) { | |
f96637be | 3447 | cifs_dbg(VFS, "CIFS mount error: iocharset %s not found\n", |
b6b38f70 | 3448 | volume_info->iocharset); |
04db79b0 | 3449 | return -ELIBACC; |
1da177e4 LT |
3450 | } |
3451 | } | |
724d9f1c | 3452 | |
724d9f1c PS |
3453 | return rc; |
3454 | } | |
3455 | ||
04db79b0 JL |
3456 | struct smb_vol * |
3457 | cifs_get_volume_info(char *mount_data, const char *devname) | |
3458 | { | |
3459 | int rc; | |
3460 | struct smb_vol *volume_info; | |
3461 | ||
6ee9542a | 3462 | volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL); |
04db79b0 JL |
3463 | if (!volume_info) |
3464 | return ERR_PTR(-ENOMEM); | |
3465 | ||
3466 | rc = cifs_setup_volume_info(volume_info, mount_data, devname); | |
3467 | if (rc) { | |
3468 | cifs_cleanup_volume_info(volume_info); | |
3469 | volume_info = ERR_PTR(rc); | |
3470 | } | |
3471 | ||
3472 | return volume_info; | |
3473 | } | |
3474 | ||
724d9f1c | 3475 | int |
2c6292ae | 3476 | cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) |
724d9f1c | 3477 | { |
1daaae8f | 3478 | int rc; |
6d5786a3 | 3479 | unsigned int xid; |
af4281dc | 3480 | struct cifs_ses *ses; |
96daf2b0 | 3481 | struct cifs_tcon *tcon; |
af4281dc | 3482 | struct TCP_Server_Info *server; |
724d9f1c PS |
3483 | char *full_path; |
3484 | struct tcon_link *tlink; | |
3485 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
3486 | int referral_walks_count = 0; | |
20547490 | 3487 | #endif |
dd854466 | 3488 | |
b4caecd4 | 3489 | rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs"); |
dd854466 AV |
3490 | if (rc) |
3491 | return rc; | |
3492 | ||
20547490 | 3493 | #ifdef CONFIG_CIFS_DFS_UPCALL |
724d9f1c PS |
3494 | try_mount_again: |
3495 | /* cleanup activities if we're chasing a referral */ | |
3496 | if (referral_walks_count) { | |
3497 | if (tcon) | |
3498 | cifs_put_tcon(tcon); | |
af4281dc PS |
3499 | else if (ses) |
3500 | cifs_put_smb_ses(ses); | |
724d9f1c | 3501 | |
1dfd18d0 SP |
3502 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_POSIX_PATHS; |
3503 | ||
6d5786a3 | 3504 | free_xid(xid); |
724d9f1c PS |
3505 | } |
3506 | #endif | |
1daaae8f | 3507 | rc = 0; |
724d9f1c | 3508 | tcon = NULL; |
af4281dc PS |
3509 | ses = NULL; |
3510 | server = NULL; | |
724d9f1c PS |
3511 | full_path = NULL; |
3512 | tlink = NULL; | |
3513 | ||
6d5786a3 | 3514 | xid = get_xid(); |
1da177e4 | 3515 | |
63c038c2 | 3516 | /* get a reference to a tcp session */ |
af4281dc PS |
3517 | server = cifs_get_tcp_session(volume_info); |
3518 | if (IS_ERR(server)) { | |
3519 | rc = PTR_ERR(server); | |
dd854466 | 3520 | bdi_destroy(&cifs_sb->bdi); |
63c038c2 | 3521 | goto out; |
1da177e4 LT |
3522 | } |
3523 | ||
36988c76 | 3524 | /* get a reference to a SMB session */ |
af4281dc PS |
3525 | ses = cifs_get_smb_ses(server, volume_info); |
3526 | if (IS_ERR(ses)) { | |
3527 | rc = PTR_ERR(ses); | |
3528 | ses = NULL; | |
36988c76 | 3529 | goto mount_fail_check; |
1da177e4 | 3530 | } |
50c2f753 | 3531 | |
592fafe6 | 3532 | #ifdef CONFIG_CIFS_SMB2 |
b618f001 SF |
3533 | if ((volume_info->persistent == true) && ((ses->server->capabilities & |
3534 | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) == 0)) { | |
3535 | cifs_dbg(VFS, "persistent handles not supported by server\n"); | |
3536 | rc = -EOPNOTSUPP; | |
3537 | goto mount_fail_check; | |
3538 | } | |
592fafe6 SF |
3539 | #endif /* CONFIG_CIFS_SMB2*/ |
3540 | ||
d00c28de | 3541 | /* search for existing tcon to this server share */ |
af4281dc | 3542 | tcon = cifs_get_tcon(ses, volume_info); |
d00c28de JL |
3543 | if (IS_ERR(tcon)) { |
3544 | rc = PTR_ERR(tcon); | |
3545 | tcon = NULL; | |
1bfe73c2 | 3546 | goto remote_path_check; |
d00c28de | 3547 | } |
1bfe73c2 | 3548 | |
d82c2df5 | 3549 | /* tell server which Unix caps we support */ |
29e20f9c | 3550 | if (cap_unix(tcon->ses)) { |
d82c2df5 SF |
3551 | /* reset of caps checks mount to see if unix extensions |
3552 | disabled for just this mount */ | |
2c6292ae | 3553 | reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info); |
6848b733 SF |
3554 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && |
3555 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & | |
3556 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) { | |
3557 | rc = -EACCES; | |
3558 | goto mount_fail_check; | |
3559 | } | |
3560 | } else | |
d82c2df5 | 3561 | tcon->unix_ext = 0; /* server does not support them */ |
c18c842b | 3562 | |
af4281dc PS |
3563 | /* do not care if a following call succeed - informational */ |
3564 | if (!tcon->ipc && server->ops->qfs_tcon) | |
3565 | server->ops->qfs_tcon(xid, tcon); | |
6848b733 | 3566 | |
24985c53 PS |
3567 | cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info); |
3568 | cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info); | |
f7910cbd | 3569 | |
66bfaadc | 3570 | /* tune readahead according to rsize */ |
8f71465c | 3571 | cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE; |
f7910cbd | 3572 | |
1bfe73c2 | 3573 | remote_path_check: |
c1508ca2 SF |
3574 | #ifdef CONFIG_CIFS_DFS_UPCALL |
3575 | /* | |
3576 | * Perform an unconditional check for whether there are DFS | |
3577 | * referrals for this path without prefix, to provide support | |
3578 | * for DFS referrals from w2k8 servers which don't seem to respond | |
3579 | * with PATH_NOT_COVERED to requests that include the prefix. | |
3580 | * Chase the referral if found, otherwise continue normally. | |
3581 | */ | |
3582 | if (referral_walks_count == 0) { | |
af4281dc PS |
3583 | int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, |
3584 | false); | |
c1508ca2 SF |
3585 | if (!refrc) { |
3586 | referral_walks_count++; | |
3587 | goto try_mount_again; | |
3588 | } | |
3589 | } | |
3590 | #endif | |
3591 | ||
f87d39d9 | 3592 | /* check if a whole path is not remote */ |
70945643 | 3593 | if (!rc && tcon) { |
68889f26 PS |
3594 | if (!server->ops->is_path_accessible) { |
3595 | rc = -ENOSYS; | |
3596 | goto mount_fail_check; | |
3597 | } | |
6d3ea7e4 SF |
3598 | /* |
3599 | * cifs_build_path_to_root works only when we have a valid tcon | |
3600 | */ | |
3601 | full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon); | |
e4cce94c IM |
3602 | if (full_path == NULL) { |
3603 | rc = -ENOMEM; | |
3604 | goto mount_fail_check; | |
3605 | } | |
68889f26 PS |
3606 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, |
3607 | full_path); | |
03ceace5 | 3608 | if (rc != 0 && rc != -EREMOTE) { |
e4cce94c IM |
3609 | kfree(full_path); |
3610 | goto mount_fail_check; | |
3611 | } | |
3612 | kfree(full_path); | |
3613 | } | |
3614 | ||
1bfe73c2 IM |
3615 | /* get referral if needed */ |
3616 | if (rc == -EREMOTE) { | |
d036f50f | 3617 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
3618 | if (referral_walks_count > MAX_NESTED_LINKS) { |
3619 | /* | |
3620 | * BB: when we implement proper loop detection, | |
3621 | * we will remove this check. But now we need it | |
3622 | * to prevent an indefinite loop if 'DFS tree' is | |
3623 | * misconfigured (i.e. has loops). | |
3624 | */ | |
3625 | rc = -ELOOP; | |
3626 | goto mount_fail_check; | |
3627 | } | |
1bfe73c2 | 3628 | |
af4281dc | 3629 | rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true); |
7b91e266 | 3630 | |
dd613945 | 3631 | if (!rc) { |
5c2503a8 | 3632 | referral_walks_count++; |
1bfe73c2 IM |
3633 | goto try_mount_again; |
3634 | } | |
dd613945 | 3635 | goto mount_fail_check; |
d036f50f SF |
3636 | #else /* No DFS support, return error on mount */ |
3637 | rc = -EOPNOTSUPP; | |
3638 | #endif | |
1bfe73c2 IM |
3639 | } |
3640 | ||
9d002df4 JL |
3641 | if (rc) |
3642 | goto mount_fail_check; | |
3643 | ||
3644 | /* now, hang the tcon off of the superblock */ | |
3645 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); | |
3646 | if (tlink == NULL) { | |
3647 | rc = -ENOMEM; | |
3648 | goto mount_fail_check; | |
3649 | } | |
3650 | ||
af4281dc | 3651 | tlink->tl_uid = ses->linux_uid; |
9d002df4 JL |
3652 | tlink->tl_tcon = tcon; |
3653 | tlink->tl_time = jiffies; | |
3654 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
3655 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3656 | ||
b647c35f | 3657 | cifs_sb->master_tlink = tlink; |
9d002df4 | 3658 | spin_lock(&cifs_sb->tlink_tree_lock); |
b647c35f | 3659 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
9d002df4 | 3660 | spin_unlock(&cifs_sb->tlink_tree_lock); |
413e661c | 3661 | |
da472fc8 | 3662 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
3663 | TLINK_IDLE_EXPIRE); |
3664 | ||
1bfe73c2 IM |
3665 | mount_fail_check: |
3666 | /* on error free sesinfo and tcon struct if needed */ | |
3667 | if (rc) { | |
1bfe73c2 | 3668 | /* If find_unc succeeded then rc == 0 so we can not end */ |
25985edc | 3669 | /* up accidentally freeing someone elses tcon struct */ |
1bfe73c2 IM |
3670 | if (tcon) |
3671 | cifs_put_tcon(tcon); | |
af4281dc PS |
3672 | else if (ses) |
3673 | cifs_put_smb_ses(ses); | |
1bfe73c2 | 3674 | else |
af4281dc | 3675 | cifs_put_tcp_session(server); |
dd854466 | 3676 | bdi_destroy(&cifs_sb->bdi); |
1bfe73c2 IM |
3677 | } |
3678 | ||
70fe7dc0 | 3679 | out: |
6d5786a3 | 3680 | free_xid(xid); |
1da177e4 LT |
3681 | return rc; |
3682 | } | |
3683 | ||
8d1bca32 JL |
3684 | /* |
3685 | * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon | |
3686 | * pointer may be NULL. | |
3687 | */ | |
1da177e4 | 3688 | int |
2e6e02ab | 3689 | CIFSTCon(const unsigned int xid, struct cifs_ses *ses, |
96daf2b0 | 3690 | const char *tree, struct cifs_tcon *tcon, |
1da177e4 LT |
3691 | const struct nls_table *nls_codepage) |
3692 | { | |
3693 | struct smb_hdr *smb_buffer; | |
3694 | struct smb_hdr *smb_buffer_response; | |
3695 | TCONX_REQ *pSMB; | |
3696 | TCONX_RSP *pSMBr; | |
3697 | unsigned char *bcc_ptr; | |
3698 | int rc = 0; | |
690c522f JL |
3699 | int length; |
3700 | __u16 bytes_left, count; | |
1da177e4 LT |
3701 | |
3702 | if (ses == NULL) | |
3703 | return -EIO; | |
3704 | ||
3705 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 3706 | if (smb_buffer == NULL) |
1da177e4 | 3707 | return -ENOMEM; |
ca43e3be | 3708 | |
1da177e4 LT |
3709 | smb_buffer_response = smb_buffer; |
3710 | ||
3711 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
3712 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 | 3713 | |
88257360 | 3714 | smb_buffer->Mid = get_next_mid(ses->server); |
1da177e4 LT |
3715 | smb_buffer->Uid = ses->Suid; |
3716 | pSMB = (TCONX_REQ *) smb_buffer; | |
3717 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
3718 | ||
3719 | pSMB->AndXCommand = 0xFF; | |
3720 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 3721 | bcc_ptr = &pSMB->Password[0]; |
8d1bca32 | 3722 | if (!tcon || (ses->server->sec_mode & SECMODE_USER)) { |
eeac8047 | 3723 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 3724 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 3725 | bcc_ptr++; /* skip password */ |
7c7b25bc | 3726 | /* already aligned so no need to do it below */ |
eeac8047 | 3727 | } else { |
540b2e37 | 3728 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
3729 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
3730 | specified as required (when that support is added to | |
3731 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 3732 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
3733 | by Samba (not sure whether other servers allow |
3734 | NTLMv2 password here) */ | |
7c7b25bc | 3735 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 3736 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
3f618223 | 3737 | (ses->sectype == LANMAN)) |
d3ba50b1 | 3738 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
96daf2b0 | 3739 | ses->server->sec_mode & |
4e53a3fb JL |
3740 | SECMODE_PW_ENCRYPT ? true : false, |
3741 | bcc_ptr); | |
7c7b25bc SF |
3742 | else |
3743 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 | 3744 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
9ef5992e | 3745 | bcc_ptr, nls_codepage); |
f3a31a2b SF |
3746 | if (rc) { |
3747 | cifs_dbg(FYI, "%s Can't generate NTLM rsp. Error: %d\n", | |
3748 | __func__, rc); | |
3749 | cifs_buf_release(smb_buffer); | |
3750 | return rc; | |
3751 | } | |
eeac8047 | 3752 | |
540b2e37 | 3753 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 3754 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
3755 | /* must align unicode strings */ |
3756 | *bcc_ptr = 0; /* null byte password */ | |
3757 | bcc_ptr++; | |
3758 | } | |
eeac8047 | 3759 | } |
1da177e4 | 3760 | |
38d77c50 | 3761 | if (ses->server->sign) |
1da177e4 LT |
3762 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
3763 | ||
3764 | if (ses->capabilities & CAP_STATUS32) { | |
3765 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
3766 | } | |
3767 | if (ses->capabilities & CAP_DFS) { | |
3768 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
3769 | } | |
3770 | if (ses->capabilities & CAP_UNICODE) { | |
3771 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
3772 | length = | |
acbbb76a | 3773 | cifs_strtoUTF16((__le16 *) bcc_ptr, tree, |
50c2f753 | 3774 | 6 /* max utf8 char length in bytes */ * |
a878fb22 SF |
3775 | (/* server len*/ + 256 /* share len */), nls_codepage); |
3776 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
3777 | bcc_ptr += 2; /* skip trailing null */ |
3778 | } else { /* ASCII */ | |
1da177e4 LT |
3779 | strcpy(bcc_ptr, tree); |
3780 | bcc_ptr += strlen(tree) + 1; | |
3781 | } | |
3782 | strcpy(bcc_ptr, "?????"); | |
3783 | bcc_ptr += strlen("?????"); | |
3784 | bcc_ptr += 1; | |
3785 | count = bcc_ptr - &pSMB->Password[0]; | |
be8e3b00 SF |
3786 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
3787 | pSMB->hdr.smb_buf_length) + count); | |
1da177e4 LT |
3788 | pSMB->ByteCount = cpu_to_le16(count); |
3789 | ||
133672ef | 3790 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 3791 | 0); |
1da177e4 | 3792 | |
1da177e4 LT |
3793 | /* above now done in SendReceive */ |
3794 | if ((rc == 0) && (tcon != NULL)) { | |
0e0d2cf3 SF |
3795 | bool is_unicode; |
3796 | ||
1da177e4 | 3797 | tcon->tidStatus = CifsGood; |
3b795210 | 3798 | tcon->need_reconnect = false; |
1da177e4 LT |
3799 | tcon->tid = smb_buffer_response->Tid; |
3800 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 3801 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 3802 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
3803 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
3804 | is_unicode = true; | |
3805 | else | |
3806 | is_unicode = false; | |
3807 | ||
cc20c031 | 3808 | |
50c2f753 | 3809 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
3810 | if (length == 3) { |
3811 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
3812 | (bcc_ptr[2] == 'C')) { | |
f96637be | 3813 | cifs_dbg(FYI, "IPC connection\n"); |
7f8ed420 SF |
3814 | tcon->ipc = 1; |
3815 | } | |
3816 | } else if (length == 2) { | |
3817 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
3818 | /* the most common case */ | |
f96637be | 3819 | cifs_dbg(FYI, "disk share connection\n"); |
7f8ed420 SF |
3820 | } |
3821 | } | |
50c2f753 | 3822 | bcc_ptr += length + 1; |
cc20c031 | 3823 | bytes_left -= (length + 1); |
46b51d08 | 3824 | strlcpy(tcon->treeName, tree, sizeof(tcon->treeName)); |
cc20c031 JL |
3825 | |
3826 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 3827 | kfree(tcon->nativeFileSystem); |
acbbb76a | 3828 | tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr, |
0e0d2cf3 | 3829 | bytes_left, is_unicode, |
cc20c031 JL |
3830 | nls_codepage); |
3831 | ||
f96637be | 3832 | cifs_dbg(FYI, "nativeFileSystem=%s\n", tcon->nativeFileSystem); |
cc20c031 | 3833 | |
fb8c4b14 | 3834 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
3835 | (smb_buffer_response->WordCount == 7)) |
3836 | /* field is in same location */ | |
3979877e SF |
3837 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
3838 | else | |
3839 | tcon->Flags = 0; | |
f96637be | 3840 | cifs_dbg(FYI, "Tcon flags: 0x%x\n", tcon->Flags); |
1da177e4 | 3841 | } else if ((rc == 0) && tcon == NULL) { |
50c2f753 | 3842 | /* all we need to save for IPC$ connection */ |
1da177e4 LT |
3843 | ses->ipc_tid = smb_buffer_response->Tid; |
3844 | } | |
3845 | ||
a8a11d39 | 3846 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
3847 | return rc; |
3848 | } | |
3849 | ||
2e32cf5e AV |
3850 | static void delayed_free(struct rcu_head *p) |
3851 | { | |
3852 | struct cifs_sb_info *sbi = container_of(p, struct cifs_sb_info, rcu); | |
3853 | unload_nls(sbi->local_nls); | |
3854 | kfree(sbi); | |
3855 | } | |
3856 | ||
2a9b9951 AV |
3857 | void |
3858 | cifs_umount(struct cifs_sb_info *cifs_sb) | |
1da177e4 | 3859 | { |
b647c35f JL |
3860 | struct rb_root *root = &cifs_sb->tlink_tree; |
3861 | struct rb_node *node; | |
3862 | struct tcon_link *tlink; | |
9d002df4 | 3863 | |
2de970ff JL |
3864 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
3865 | ||
b647c35f JL |
3866 | spin_lock(&cifs_sb->tlink_tree_lock); |
3867 | while ((node = rb_first(root))) { | |
3868 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
3869 | cifs_get_tlink(tlink); | |
3870 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3871 | rb_erase(node, root); | |
1da177e4 | 3872 | |
b647c35f JL |
3873 | spin_unlock(&cifs_sb->tlink_tree_lock); |
3874 | cifs_put_tlink(tlink); | |
3875 | spin_lock(&cifs_sb->tlink_tree_lock); | |
3876 | } | |
3877 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 3878 | |
dd854466 | 3879 | bdi_destroy(&cifs_sb->bdi); |
d757d71b | 3880 | kfree(cifs_sb->mountdata); |
2e32cf5e | 3881 | call_rcu(&cifs_sb->rcu, delayed_free); |
50c2f753 | 3882 | } |
1da177e4 | 3883 | |
286170aa PS |
3884 | int |
3885 | cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses) | |
1da177e4 LT |
3886 | { |
3887 | int rc = 0; | |
198b5682 | 3888 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 3889 | |
286170aa PS |
3890 | if (!server->ops->need_neg || !server->ops->negotiate) |
3891 | return -ENOSYS; | |
3892 | ||
198b5682 | 3893 | /* only send once per connect */ |
286170aa | 3894 | if (!server->ops->need_neg(server)) |
198b5682 JL |
3895 | return 0; |
3896 | ||
45275789 | 3897 | set_credits(server, 1); |
286170aa PS |
3898 | |
3899 | rc = server->ops->negotiate(xid, ses); | |
198b5682 JL |
3900 | if (rc == 0) { |
3901 | spin_lock(&GlobalMid_Lock); | |
7fdbaa1b | 3902 | if (server->tcpStatus == CifsNeedNegotiate) |
198b5682 JL |
3903 | server->tcpStatus = CifsGood; |
3904 | else | |
3905 | rc = -EHOSTDOWN; | |
3906 | spin_unlock(&GlobalMid_Lock); | |
198b5682 JL |
3907 | } |
3908 | ||
3909 | return rc; | |
3910 | } | |
3911 | ||
58c45c58 PS |
3912 | int |
3913 | cifs_setup_session(const unsigned int xid, struct cifs_ses *ses, | |
3914 | struct nls_table *nls_info) | |
198b5682 | 3915 | { |
58c45c58 | 3916 | int rc = -ENOSYS; |
198b5682 | 3917 | struct TCP_Server_Info *server = ses->server; |
26b994fa | 3918 | |
198b5682 | 3919 | ses->capabilities = server->capabilities; |
26b994fa | 3920 | if (linuxExtEnabled == 0) |
29e20f9c | 3921 | ses->capabilities &= (~server->vals->cap_unix); |
20418acd | 3922 | |
f96637be | 3923 | cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n", |
96daf2b0 | 3924 | server->sec_mode, server->capabilities, server->timeAdj); |
cb7691b6 | 3925 | |
58c45c58 PS |
3926 | if (server->ops->sess_setup) |
3927 | rc = server->ops->sess_setup(xid, ses, nls_info); | |
3928 | ||
d4e63bd6 | 3929 | if (rc) |
f96637be | 3930 | cifs_dbg(VFS, "Send error in SessSetup = %d\n", rc); |
21e73393 | 3931 | |
1da177e4 LT |
3932 | return rc; |
3933 | } | |
3934 | ||
8a8798a5 JL |
3935 | static int |
3936 | cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses) | |
3937 | { | |
3f618223 JL |
3938 | vol->sectype = ses->sectype; |
3939 | ||
3940 | /* krb5 is special, since we don't need username or pw */ | |
3941 | if (vol->sectype == Kerberos) | |
8a8798a5 | 3942 | return 0; |
8a8798a5 JL |
3943 | |
3944 | return cifs_set_cifscreds(vol, ses); | |
3945 | } | |
3946 | ||
96daf2b0 | 3947 | static struct cifs_tcon * |
6d4a0832 | 3948 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid) |
9d002df4 | 3949 | { |
8a8798a5 | 3950 | int rc; |
96daf2b0 SF |
3951 | struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); |
3952 | struct cifs_ses *ses; | |
3953 | struct cifs_tcon *tcon = NULL; | |
9d002df4 | 3954 | struct smb_vol *vol_info; |
9d002df4 JL |
3955 | |
3956 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
803ab977 DC |
3957 | if (vol_info == NULL) |
3958 | return ERR_PTR(-ENOMEM); | |
9d002df4 | 3959 | |
9d002df4 JL |
3960 | vol_info->local_nls = cifs_sb->local_nls; |
3961 | vol_info->linux_uid = fsuid; | |
3962 | vol_info->cred_uid = fsuid; | |
3963 | vol_info->UNC = master_tcon->treeName; | |
3964 | vol_info->retry = master_tcon->retry; | |
3965 | vol_info->nocase = master_tcon->nocase; | |
3966 | vol_info->local_lease = master_tcon->local_lease; | |
3967 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
28e11bd8 JL |
3968 | vol_info->sectype = master_tcon->ses->sectype; |
3969 | vol_info->sign = master_tcon->ses->sign; | |
9d002df4 | 3970 | |
8a8798a5 JL |
3971 | rc = cifs_set_vol_auth(vol_info, master_tcon->ses); |
3972 | if (rc) { | |
3973 | tcon = ERR_PTR(rc); | |
3974 | goto out; | |
3975 | } | |
9d002df4 JL |
3976 | |
3977 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 3978 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 3979 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 3980 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
3981 | |
3982 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
3983 | if (IS_ERR(ses)) { | |
96daf2b0 | 3984 | tcon = (struct cifs_tcon *)ses; |
9d002df4 JL |
3985 | cifs_put_tcp_session(master_tcon->ses->server); |
3986 | goto out; | |
3987 | } | |
3988 | ||
3989 | tcon = cifs_get_tcon(ses, vol_info); | |
3990 | if (IS_ERR(tcon)) { | |
3991 | cifs_put_smb_ses(ses); | |
3992 | goto out; | |
3993 | } | |
3994 | ||
29e20f9c | 3995 | if (cap_unix(ses)) |
9d002df4 JL |
3996 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); |
3997 | out: | |
8a8798a5 JL |
3998 | kfree(vol_info->username); |
3999 | kfree(vol_info->password); | |
9d002df4 JL |
4000 | kfree(vol_info); |
4001 | ||
4002 | return tcon; | |
4003 | } | |
4004 | ||
96daf2b0 | 4005 | struct cifs_tcon * |
9d002df4 JL |
4006 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) |
4007 | { | |
4008 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
4009 | } | |
4010 | ||
b647c35f JL |
4011 | /* find and return a tlink with given uid */ |
4012 | static struct tcon_link * | |
6d4a0832 | 4013 | tlink_rb_search(struct rb_root *root, kuid_t uid) |
b647c35f JL |
4014 | { |
4015 | struct rb_node *node = root->rb_node; | |
4016 | struct tcon_link *tlink; | |
4017 | ||
4018 | while (node) { | |
4019 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
4020 | ||
6d4a0832 | 4021 | if (uid_gt(tlink->tl_uid, uid)) |
b647c35f | 4022 | node = node->rb_left; |
6d4a0832 | 4023 | else if (uid_lt(tlink->tl_uid, uid)) |
b647c35f JL |
4024 | node = node->rb_right; |
4025 | else | |
4026 | return tlink; | |
4027 | } | |
4028 | return NULL; | |
4029 | } | |
4030 | ||
4031 | /* insert a tcon_link into the tree */ | |
4032 | static void | |
4033 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
4034 | { | |
4035 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
4036 | struct tcon_link *tlink; | |
4037 | ||
4038 | while (*new) { | |
4039 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
4040 | parent = *new; | |
4041 | ||
6d4a0832 | 4042 | if (uid_gt(tlink->tl_uid, new_tlink->tl_uid)) |
b647c35f JL |
4043 | new = &((*new)->rb_left); |
4044 | else | |
4045 | new = &((*new)->rb_right); | |
4046 | } | |
4047 | ||
4048 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
4049 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
4050 | } | |
4051 | ||
9d002df4 JL |
4052 | /* |
4053 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
4054 | * current task. | |
4055 | * | |
4056 | * If the superblock doesn't refer to a multiuser mount, then just return | |
4057 | * the master tcon for the mount. | |
4058 | * | |
6ef933a3 | 4059 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
4060 | * exists, then check to see if it's pending construction. If it is then wait |
4061 | * for construction to complete. Once it's no longer pending, check to see if | |
4062 | * it failed and either return an error or retry construction, depending on | |
4063 | * the timeout. | |
4064 | * | |
4065 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
4066 | * try to construct a new one. | |
4067 | */ | |
4068 | struct tcon_link * | |
4069 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
4070 | { | |
4071 | int ret; | |
6d4a0832 | 4072 | kuid_t fsuid = current_fsuid(); |
9d002df4 JL |
4073 | struct tcon_link *tlink, *newtlink; |
4074 | ||
4075 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
4076 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
4077 | ||
4078 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 4079 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4080 | if (tlink) |
4081 | cifs_get_tlink(tlink); | |
4082 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4083 | ||
4084 | if (tlink == NULL) { | |
4085 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
4086 | if (newtlink == NULL) | |
4087 | return ERR_PTR(-ENOMEM); | |
b647c35f | 4088 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
4089 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
4090 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
4091 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
4092 | cifs_get_tlink(newtlink); | |
4093 | ||
9d002df4 JL |
4094 | spin_lock(&cifs_sb->tlink_tree_lock); |
4095 | /* was one inserted after previous search? */ | |
b647c35f | 4096 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4097 | if (tlink) { |
4098 | cifs_get_tlink(tlink); | |
4099 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4100 | kfree(newtlink); |
4101 | goto wait_for_construction; | |
4102 | } | |
9d002df4 | 4103 | tlink = newtlink; |
b647c35f JL |
4104 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
4105 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4106 | } else { |
4107 | wait_for_construction: | |
4108 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
9d002df4 JL |
4109 | TASK_INTERRUPTIBLE); |
4110 | if (ret) { | |
4111 | cifs_put_tlink(tlink); | |
74316201 | 4112 | return ERR_PTR(-ERESTARTSYS); |
9d002df4 JL |
4113 | } |
4114 | ||
4115 | /* if it's good, return it */ | |
4116 | if (!IS_ERR(tlink->tl_tcon)) | |
4117 | return tlink; | |
4118 | ||
4119 | /* return error if we tried this already recently */ | |
4120 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
4121 | cifs_put_tlink(tlink); | |
4122 | return ERR_PTR(-EACCES); | |
4123 | } | |
4124 | ||
4125 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
4126 | goto wait_for_construction; | |
4127 | } | |
4128 | ||
4129 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
4130 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
4131 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
4132 | ||
4133 | if (IS_ERR(tlink->tl_tcon)) { | |
4134 | cifs_put_tlink(tlink); | |
4135 | return ERR_PTR(-EACCES); | |
4136 | } | |
4137 | ||
4138 | return tlink; | |
4139 | } | |
2de970ff JL |
4140 | |
4141 | /* | |
4142 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
4143 | * out tcons. | |
4144 | */ | |
4145 | static void | |
4146 | cifs_prune_tlinks(struct work_struct *work) | |
4147 | { | |
4148 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
4149 | prune_tlinks.work); | |
b647c35f JL |
4150 | struct rb_root *root = &cifs_sb->tlink_tree; |
4151 | struct rb_node *node = rb_first(root); | |
4152 | struct rb_node *tmp; | |
4153 | struct tcon_link *tlink; | |
2de970ff | 4154 | |
b647c35f JL |
4155 | /* |
4156 | * Because we drop the spinlock in the loop in order to put the tlink | |
4157 | * it's not guarded against removal of links from the tree. The only | |
4158 | * places that remove entries from the tree are this function and | |
4159 | * umounts. Because this function is non-reentrant and is canceled | |
4160 | * before umount can proceed, this is safe. | |
4161 | */ | |
4162 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4163 | node = rb_first(root); | |
4164 | while (node != NULL) { | |
4165 | tmp = node; | |
4166 | node = rb_next(tmp); | |
4167 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
4168 | ||
4169 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
4170 | atomic_read(&tlink->tl_count) != 0 || | |
4171 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
4172 | continue; | |
2de970ff | 4173 | |
b647c35f JL |
4174 | cifs_get_tlink(tlink); |
4175 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4176 | rb_erase(tmp, root); | |
4177 | ||
4178 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4179 | cifs_put_tlink(tlink); | |
4180 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4181 | } | |
4182 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff | 4183 | |
da472fc8 | 4184 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
4185 | TLINK_IDLE_EXPIRE); |
4186 | } |