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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> | |
3f07c014 | 24 | #include <linux/sched/signal.h> |
1da177e4 LT |
25 | #include <linux/list.h> |
26 | #include <linux/wait.h> | |
5a0e3ad6 | 27 | #include <linux/slab.h> |
1da177e4 LT |
28 | #include <linux/pagemap.h> |
29 | #include <linux/ctype.h> | |
30 | #include <linux/utsname.h> | |
31 | #include <linux/mempool.h> | |
b8643e1b | 32 | #include <linux/delay.h> |
f191401f | 33 | #include <linux/completion.h> |
aaf737ad | 34 | #include <linux/kthread.h> |
0ae0efad | 35 | #include <linux/pagevec.h> |
7dfb7103 | 36 | #include <linux/freezer.h> |
5c2503a8 | 37 | #include <linux/namei.h> |
c6e970a0 | 38 | #include <linux/uuid.h> |
7c0f6ba6 | 39 | #include <linux/uaccess.h> |
1da177e4 | 40 | #include <asm/processor.h> |
50b64e3b | 41 | #include <linux/inet.h> |
143cb494 | 42 | #include <linux/module.h> |
8a8798a5 | 43 | #include <keys/user-type.h> |
0e2bedaa | 44 | #include <net/ipv6.h> |
8830d7e0 | 45 | #include <linux/parser.h> |
2f8b5444 | 46 | #include <linux/bvec.h> |
8830d7e0 | 47 | |
1da177e4 LT |
48 | #include "cifspdu.h" |
49 | #include "cifsglob.h" | |
50 | #include "cifsproto.h" | |
51 | #include "cifs_unicode.h" | |
52 | #include "cifs_debug.h" | |
53 | #include "cifs_fs_sb.h" | |
54 | #include "ntlmssp.h" | |
55 | #include "nterr.h" | |
56 | #include "rfc1002pdu.h" | |
488f1d2d | 57 | #include "fscache.h" |
53e0e11e PS |
58 | #ifdef CONFIG_CIFS_SMB2 |
59 | #include "smb2proto.h" | |
60 | #endif | |
1da177e4 LT |
61 | |
62 | #define CIFS_PORT 445 | |
63 | #define RFC1001_PORT 139 | |
64 | ||
1da177e4 LT |
65 | extern mempool_t *cifs_req_poolp; |
66 | ||
2de970ff | 67 | /* FIXME: should these be tunable? */ |
9d002df4 | 68 | #define TLINK_ERROR_EXPIRE (1 * HZ) |
2de970ff | 69 | #define TLINK_IDLE_EXPIRE (600 * HZ) |
9d002df4 | 70 | |
8830d7e0 | 71 | enum { |
8830d7e0 SP |
72 | /* Mount options that take no arguments */ |
73 | Opt_user_xattr, Opt_nouser_xattr, | |
74 | Opt_forceuid, Opt_noforceuid, | |
72bd481f | 75 | Opt_forcegid, Opt_noforcegid, |
8830d7e0 SP |
76 | Opt_noblocksend, Opt_noautotune, |
77 | Opt_hard, Opt_soft, Opt_perm, Opt_noperm, | |
2baa2682 | 78 | Opt_mapposix, Opt_nomapposix, |
8830d7e0 SP |
79 | Opt_mapchars, Opt_nomapchars, Opt_sfu, |
80 | Opt_nosfu, Opt_nodfs, Opt_posixpaths, | |
81 | Opt_noposixpaths, Opt_nounix, | |
82 | Opt_nocase, | |
83 | Opt_brl, Opt_nobrl, | |
95932655 | 84 | Opt_forcemandatorylock, Opt_setuidfromacl, Opt_setuids, |
8830d7e0 SP |
85 | Opt_nosetuids, Opt_dynperm, Opt_nodynperm, |
86 | Opt_nohard, Opt_nosoft, | |
87 | Opt_nointr, Opt_intr, | |
88 | Opt_nostrictsync, Opt_strictsync, | |
89 | Opt_serverino, Opt_noserverino, | |
90 | Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl, | |
91 | Opt_acl, Opt_noacl, Opt_locallease, | |
1b359204 | 92 | Opt_sign, Opt_seal, Opt_noac, |
8830d7e0 | 93 | Opt_fsc, Opt_mfsymlinks, |
a0b3df5c | 94 | Opt_multiuser, Opt_sloppy, Opt_nosharesock, |
b2a30774 | 95 | Opt_persistent, Opt_nopersistent, |
592fafe6 | 96 | Opt_resilient, Opt_noresilient, |
39566443 | 97 | Opt_domainauto, |
8830d7e0 SP |
98 | |
99 | /* Mount options which take numeric value */ | |
100 | Opt_backupuid, Opt_backupgid, Opt_uid, | |
101 | Opt_cruid, Opt_gid, Opt_file_mode, | |
102 | Opt_dirmode, Opt_port, | |
103 | Opt_rsize, Opt_wsize, Opt_actimeo, | |
141891f4 | 104 | Opt_echo_interval, Opt_max_credits, |
8b217fe7 | 105 | Opt_snapshot, |
8830d7e0 SP |
106 | |
107 | /* Mount options which take string value */ | |
108 | Opt_user, Opt_pass, Opt_ip, | |
73a999fa | 109 | Opt_domain, Opt_srcaddr, Opt_iocharset, |
8830d7e0 | 110 | Opt_netbiosname, Opt_servern, |
23db65f5 | 111 | Opt_ver, Opt_vers, Opt_sec, Opt_cache, |
8830d7e0 SP |
112 | |
113 | /* Mount options to be ignored */ | |
114 | Opt_ignore, | |
115 | ||
116 | /* Options which could be blank */ | |
117 | Opt_blank_pass, | |
4fe9e963 SP |
118 | Opt_blank_user, |
119 | Opt_blank_ip, | |
8830d7e0 SP |
120 | |
121 | Opt_err | |
122 | }; | |
123 | ||
124 | static const match_table_t cifs_mount_option_tokens = { | |
125 | ||
126 | { Opt_user_xattr, "user_xattr" }, | |
127 | { Opt_nouser_xattr, "nouser_xattr" }, | |
128 | { Opt_forceuid, "forceuid" }, | |
129 | { Opt_noforceuid, "noforceuid" }, | |
72bd481f JL |
130 | { Opt_forcegid, "forcegid" }, |
131 | { Opt_noforcegid, "noforcegid" }, | |
8830d7e0 SP |
132 | { Opt_noblocksend, "noblocksend" }, |
133 | { Opt_noautotune, "noautotune" }, | |
134 | { Opt_hard, "hard" }, | |
135 | { Opt_soft, "soft" }, | |
136 | { Opt_perm, "perm" }, | |
137 | { Opt_noperm, "noperm" }, | |
2baa2682 | 138 | { Opt_mapchars, "mapchars" }, /* SFU style */ |
8830d7e0 | 139 | { Opt_nomapchars, "nomapchars" }, |
2baa2682 SF |
140 | { Opt_mapposix, "mapposix" }, /* SFM style */ |
141 | { Opt_nomapposix, "nomapposix" }, | |
8830d7e0 SP |
142 | { Opt_sfu, "sfu" }, |
143 | { Opt_nosfu, "nosfu" }, | |
144 | { Opt_nodfs, "nodfs" }, | |
145 | { Opt_posixpaths, "posixpaths" }, | |
146 | { Opt_noposixpaths, "noposixpaths" }, | |
147 | { Opt_nounix, "nounix" }, | |
148 | { Opt_nounix, "nolinux" }, | |
149 | { Opt_nocase, "nocase" }, | |
150 | { Opt_nocase, "ignorecase" }, | |
151 | { Opt_brl, "brl" }, | |
152 | { Opt_nobrl, "nobrl" }, | |
153 | { Opt_nobrl, "nolock" }, | |
154 | { Opt_forcemandatorylock, "forcemandatorylock" }, | |
5cfdddcf | 155 | { Opt_forcemandatorylock, "forcemand" }, |
8830d7e0 SP |
156 | { Opt_setuids, "setuids" }, |
157 | { Opt_nosetuids, "nosetuids" }, | |
95932655 | 158 | { Opt_setuidfromacl, "idsfromsid" }, |
8830d7e0 SP |
159 | { Opt_dynperm, "dynperm" }, |
160 | { Opt_nodynperm, "nodynperm" }, | |
161 | { Opt_nohard, "nohard" }, | |
162 | { Opt_nosoft, "nosoft" }, | |
163 | { Opt_nointr, "nointr" }, | |
164 | { Opt_intr, "intr" }, | |
165 | { Opt_nostrictsync, "nostrictsync" }, | |
166 | { Opt_strictsync, "strictsync" }, | |
167 | { Opt_serverino, "serverino" }, | |
168 | { Opt_noserverino, "noserverino" }, | |
169 | { Opt_rwpidforward, "rwpidforward" }, | |
170 | { Opt_cifsacl, "cifsacl" }, | |
171 | { Opt_nocifsacl, "nocifsacl" }, | |
172 | { Opt_acl, "acl" }, | |
173 | { Opt_noacl, "noacl" }, | |
174 | { Opt_locallease, "locallease" }, | |
175 | { Opt_sign, "sign" }, | |
176 | { Opt_seal, "seal" }, | |
8830d7e0 SP |
177 | { Opt_noac, "noac" }, |
178 | { Opt_fsc, "fsc" }, | |
179 | { Opt_mfsymlinks, "mfsymlinks" }, | |
180 | { Opt_multiuser, "multiuser" }, | |
d8162558 | 181 | { Opt_sloppy, "sloppy" }, |
a0b3df5c | 182 | { Opt_nosharesock, "nosharesock" }, |
b2a30774 SF |
183 | { Opt_persistent, "persistenthandles"}, |
184 | { Opt_nopersistent, "nopersistenthandles"}, | |
592fafe6 SF |
185 | { Opt_resilient, "resilienthandles"}, |
186 | { Opt_noresilient, "noresilienthandles"}, | |
39566443 | 187 | { Opt_domainauto, "domainauto"}, |
8830d7e0 SP |
188 | |
189 | { Opt_backupuid, "backupuid=%s" }, | |
190 | { Opt_backupgid, "backupgid=%s" }, | |
191 | { Opt_uid, "uid=%s" }, | |
192 | { Opt_cruid, "cruid=%s" }, | |
193 | { Opt_gid, "gid=%s" }, | |
194 | { Opt_file_mode, "file_mode=%s" }, | |
195 | { Opt_dirmode, "dirmode=%s" }, | |
196 | { Opt_dirmode, "dir_mode=%s" }, | |
197 | { Opt_port, "port=%s" }, | |
198 | { Opt_rsize, "rsize=%s" }, | |
199 | { Opt_wsize, "wsize=%s" }, | |
200 | { Opt_actimeo, "actimeo=%s" }, | |
adfeb3e0 | 201 | { Opt_echo_interval, "echo_interval=%s" }, |
141891f4 | 202 | { Opt_max_credits, "max_credits=%s" }, |
8b217fe7 | 203 | { Opt_snapshot, "snapshot=%s" }, |
8830d7e0 | 204 | |
4fe9e963 SP |
205 | { Opt_blank_user, "user=" }, |
206 | { Opt_blank_user, "username=" }, | |
8830d7e0 SP |
207 | { Opt_user, "user=%s" }, |
208 | { Opt_user, "username=%s" }, | |
209 | { Opt_blank_pass, "pass=" }, | |
3c15b4cf | 210 | { Opt_blank_pass, "password=" }, |
8830d7e0 SP |
211 | { Opt_pass, "pass=%s" }, |
212 | { Opt_pass, "password=%s" }, | |
4fe9e963 SP |
213 | { Opt_blank_ip, "ip=" }, |
214 | { Opt_blank_ip, "addr=" }, | |
8830d7e0 SP |
215 | { Opt_ip, "ip=%s" }, |
216 | { Opt_ip, "addr=%s" }, | |
73a999fa JL |
217 | { Opt_ignore, "unc=%s" }, |
218 | { Opt_ignore, "target=%s" }, | |
219 | { Opt_ignore, "path=%s" }, | |
8830d7e0 SP |
220 | { Opt_domain, "dom=%s" }, |
221 | { Opt_domain, "domain=%s" }, | |
222 | { Opt_domain, "workgroup=%s" }, | |
223 | { Opt_srcaddr, "srcaddr=%s" }, | |
73a999fa | 224 | { Opt_ignore, "prefixpath=%s" }, |
8830d7e0 | 225 | { Opt_iocharset, "iocharset=%s" }, |
8830d7e0 SP |
226 | { Opt_netbiosname, "netbiosname=%s" }, |
227 | { Opt_servern, "servern=%s" }, | |
228 | { Opt_ver, "ver=%s" }, | |
23db65f5 | 229 | { Opt_vers, "vers=%s" }, |
8830d7e0 | 230 | { Opt_sec, "sec=%s" }, |
15b6a473 | 231 | { Opt_cache, "cache=%s" }, |
8830d7e0 SP |
232 | |
233 | { Opt_ignore, "cred" }, | |
234 | { Opt_ignore, "credentials" }, | |
a557b976 JL |
235 | { Opt_ignore, "cred=%s" }, |
236 | { Opt_ignore, "credentials=%s" }, | |
8830d7e0 SP |
237 | { Opt_ignore, "guest" }, |
238 | { Opt_ignore, "rw" }, | |
239 | { Opt_ignore, "ro" }, | |
240 | { Opt_ignore, "suid" }, | |
241 | { Opt_ignore, "nosuid" }, | |
242 | { Opt_ignore, "exec" }, | |
243 | { Opt_ignore, "noexec" }, | |
244 | { Opt_ignore, "nodev" }, | |
245 | { Opt_ignore, "noauto" }, | |
246 | { Opt_ignore, "dev" }, | |
247 | { Opt_ignore, "mand" }, | |
248 | { Opt_ignore, "nomand" }, | |
249 | { Opt_ignore, "_netdev" }, | |
250 | ||
251 | { Opt_err, NULL } | |
252 | }; | |
253 | ||
254 | enum { | |
255 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
256 | Opt_sec_ntlmsspi, Opt_sec_ntlmssp, | |
7659624f JL |
257 | Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2, |
258 | Opt_sec_ntlmv2i, Opt_sec_lanman, | |
8830d7e0 SP |
259 | Opt_sec_none, |
260 | ||
261 | Opt_sec_err | |
262 | }; | |
263 | ||
264 | static const match_table_t cifs_secflavor_tokens = { | |
265 | { Opt_sec_krb5, "krb5" }, | |
266 | { Opt_sec_krb5i, "krb5i" }, | |
267 | { Opt_sec_krb5p, "krb5p" }, | |
268 | { Opt_sec_ntlmsspi, "ntlmsspi" }, | |
269 | { Opt_sec_ntlmssp, "ntlmssp" }, | |
270 | { Opt_ntlm, "ntlm" }, | |
271 | { Opt_sec_ntlmi, "ntlmi" }, | |
7659624f JL |
272 | { Opt_sec_ntlmv2, "nontlm" }, |
273 | { Opt_sec_ntlmv2, "ntlmv2" }, | |
8830d7e0 | 274 | { Opt_sec_ntlmv2i, "ntlmv2i" }, |
8830d7e0 SP |
275 | { Opt_sec_lanman, "lanman" }, |
276 | { Opt_sec_none, "none" }, | |
277 | ||
278 | { Opt_sec_err, NULL } | |
279 | }; | |
280 | ||
15b6a473 JL |
281 | /* cache flavors */ |
282 | enum { | |
283 | Opt_cache_loose, | |
284 | Opt_cache_strict, | |
285 | Opt_cache_none, | |
286 | Opt_cache_err | |
287 | }; | |
288 | ||
289 | static const match_table_t cifs_cacheflavor_tokens = { | |
290 | { Opt_cache_loose, "loose" }, | |
291 | { Opt_cache_strict, "strict" }, | |
292 | { Opt_cache_none, "none" }, | |
293 | { Opt_cache_err, NULL } | |
294 | }; | |
295 | ||
23db65f5 JL |
296 | static const match_table_t cifs_smb_version_tokens = { |
297 | { Smb_1, SMB1_VERSION_STRING }, | |
dd446b16 | 298 | { Smb_20, SMB20_VERSION_STRING}, |
1080ef75 | 299 | { Smb_21, SMB21_VERSION_STRING }, |
e4aa25e7 | 300 | { Smb_30, SMB30_VERSION_STRING }, |
20b6d8b4 | 301 | { Smb_302, SMB302_VERSION_STRING }, |
5f7fbf73 SF |
302 | #ifdef CONFIG_CIFS_SMB311 |
303 | { Smb_311, SMB311_VERSION_STRING }, | |
aab1893d | 304 | { Smb_311, ALT_SMB311_VERSION_STRING }, |
5f7fbf73 SF |
305 | #endif /* SMB311 */ |
306 | { Smb_version_err, NULL } | |
23db65f5 JL |
307 | }; |
308 | ||
a9f1b85e PS |
309 | static int ip_connect(struct TCP_Server_Info *server); |
310 | static int generic_ip_connect(struct TCP_Server_Info *server); | |
b647c35f | 311 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
2de970ff | 312 | static void cifs_prune_tlinks(struct work_struct *work); |
b9bce2e9 JL |
313 | static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
314 | const char *devname); | |
1da177e4 | 315 | |
d5c5605c JL |
316 | /* |
317 | * cifs tcp session reconnection | |
318 | * | |
319 | * mark tcp session as reconnecting so temporarily locked | |
320 | * mark all smb sessions as reconnecting for tcp session | |
321 | * reconnect tcp session | |
322 | * wake up waiters on reconnection? - (not needed currently) | |
323 | */ | |
28ea5290 | 324 | int |
1da177e4 LT |
325 | cifs_reconnect(struct TCP_Server_Info *server) |
326 | { | |
327 | int rc = 0; | |
f1987b44 | 328 | struct list_head *tmp, *tmp2; |
96daf2b0 SF |
329 | struct cifs_ses *ses; |
330 | struct cifs_tcon *tcon; | |
fb8c4b14 | 331 | struct mid_q_entry *mid_entry; |
3c1105df | 332 | struct list_head retry_list; |
50c2f753 | 333 | |
1da177e4 | 334 | spin_lock(&GlobalMid_Lock); |
469ee614 | 335 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 336 | /* the demux thread will exit normally |
1da177e4 LT |
337 | next time through the loop */ |
338 | spin_unlock(&GlobalMid_Lock); | |
339 | return rc; | |
340 | } else | |
341 | server->tcpStatus = CifsNeedReconnect; | |
342 | spin_unlock(&GlobalMid_Lock); | |
343 | server->maxBuf = 0; | |
aa24d1e9 PS |
344 | #ifdef CONFIG_CIFS_SMB2 |
345 | server->max_read = 0; | |
346 | #endif | |
1da177e4 | 347 | |
f96637be | 348 | cifs_dbg(FYI, "Reconnecting tcp session\n"); |
1da177e4 LT |
349 | |
350 | /* before reconnecting the tcp session, mark the smb session (uid) | |
351 | and the tid bad so they are not used until reconnected */ | |
f96637be JP |
352 | cifs_dbg(FYI, "%s: marking sessions and tcons for reconnect\n", |
353 | __func__); | |
3f9bcca7 | 354 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 355 | list_for_each(tmp, &server->smb_ses_list) { |
96daf2b0 | 356 | ses = list_entry(tmp, struct cifs_ses, smb_ses_list); |
14fbf50d JL |
357 | ses->need_reconnect = true; |
358 | ses->ipc_tid = 0; | |
f1987b44 | 359 | list_for_each(tmp2, &ses->tcon_list) { |
96daf2b0 | 360 | tcon = list_entry(tmp2, struct cifs_tcon, tcon_list); |
3b795210 | 361 | tcon->need_reconnect = true; |
1da177e4 | 362 | } |
1da177e4 | 363 | } |
3f9bcca7 | 364 | spin_unlock(&cifs_tcp_ses_lock); |
2b84a36c | 365 | |
1da177e4 | 366 | /* do not want to be sending data on a socket we are freeing */ |
f96637be | 367 | cifs_dbg(FYI, "%s: tearing down socket\n", __func__); |
72ca545b | 368 | mutex_lock(&server->srv_mutex); |
fb8c4b14 | 369 | if (server->ssocket) { |
f96637be JP |
370 | cifs_dbg(FYI, "State: 0x%x Flags: 0x%lx\n", |
371 | server->ssocket->state, server->ssocket->flags); | |
91cf45f0 | 372 | kernel_sock_shutdown(server->ssocket, SHUT_WR); |
f96637be JP |
373 | cifs_dbg(FYI, "Post shutdown state: 0x%x Flags: 0x%lx\n", |
374 | server->ssocket->state, server->ssocket->flags); | |
1da177e4 LT |
375 | sock_release(server->ssocket); |
376 | server->ssocket = NULL; | |
377 | } | |
5d0d2882 SP |
378 | server->sequence_number = 0; |
379 | server->session_estab = false; | |
21e73393 SP |
380 | kfree(server->session_key.response); |
381 | server->session_key.response = NULL; | |
382 | server->session_key.len = 0; | |
fda35943 | 383 | server->lstrp = jiffies; |
1da177e4 | 384 | |
2b84a36c | 385 | /* mark submitted MIDs for retry and issue callback */ |
3c1105df | 386 | INIT_LIST_HEAD(&retry_list); |
f96637be | 387 | cifs_dbg(FYI, "%s: moving mids to private list\n", __func__); |
1da177e4 | 388 | spin_lock(&GlobalMid_Lock); |
2b84a36c JL |
389 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
390 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 PS |
391 | if (mid_entry->mid_state == MID_REQUEST_SUBMITTED) |
392 | mid_entry->mid_state = MID_RETRY_NEEDED; | |
3c1105df JL |
393 | list_move(&mid_entry->qhead, &retry_list); |
394 | } | |
395 | spin_unlock(&GlobalMid_Lock); | |
820962dc | 396 | mutex_unlock(&server->srv_mutex); |
3c1105df | 397 | |
f96637be | 398 | cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__); |
3c1105df JL |
399 | list_for_each_safe(tmp, tmp2, &retry_list) { |
400 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
2b84a36c JL |
401 | list_del_init(&mid_entry->qhead); |
402 | mid_entry->callback(mid_entry); | |
1da177e4 | 403 | } |
1da177e4 | 404 | |
7fdbaa1b | 405 | do { |
6c3d8909 | 406 | try_to_freeze(); |
a9f1b85e PS |
407 | |
408 | /* we should try only the port we connected to before */ | |
73e216a8 | 409 | mutex_lock(&server->srv_mutex); |
a9f1b85e | 410 | rc = generic_ip_connect(server); |
fb8c4b14 | 411 | if (rc) { |
f96637be | 412 | cifs_dbg(FYI, "reconnect error %d\n", rc); |
4afe260b | 413 | mutex_unlock(&server->srv_mutex); |
0cb766ae | 414 | msleep(3000); |
1da177e4 LT |
415 | } else { |
416 | atomic_inc(&tcpSesReconnectCount); | |
417 | spin_lock(&GlobalMid_Lock); | |
469ee614 | 418 | if (server->tcpStatus != CifsExiting) |
fd88ce93 | 419 | server->tcpStatus = CifsNeedNegotiate; |
fb8c4b14 | 420 | spin_unlock(&GlobalMid_Lock); |
4afe260b | 421 | mutex_unlock(&server->srv_mutex); |
1da177e4 | 422 | } |
7fdbaa1b | 423 | } while (server->tcpStatus == CifsNeedReconnect); |
2b84a36c | 424 | |
b8c60012 SP |
425 | if (server->tcpStatus == CifsNeedNegotiate) |
426 | mod_delayed_work(cifsiod_wq, &server->echo, 0); | |
427 | ||
1da177e4 LT |
428 | return rc; |
429 | } | |
430 | ||
c74093b6 JL |
431 | static void |
432 | cifs_echo_request(struct work_struct *work) | |
433 | { | |
434 | int rc; | |
435 | struct TCP_Server_Info *server = container_of(work, | |
436 | struct TCP_Server_Info, echo.work); | |
b8c60012 SP |
437 | unsigned long echo_interval; |
438 | ||
439 | /* | |
440 | * If we need to renegotiate, set echo interval to zero to | |
441 | * immediately call echo service where we can renegotiate. | |
442 | */ | |
443 | if (server->tcpStatus == CifsNeedNegotiate) | |
444 | echo_interval = 0; | |
445 | else | |
446 | echo_interval = server->echo_interval; | |
c74093b6 | 447 | |
247ec9b4 | 448 | /* |
b8c60012 SP |
449 | * We cannot send an echo if it is disabled. |
450 | * Also, no need to ping if we got a response recently. | |
247ec9b4 | 451 | */ |
4fcd1813 SF |
452 | |
453 | if (server->tcpStatus == CifsNeedReconnect || | |
b8c60012 SP |
454 | server->tcpStatus == CifsExiting || |
455 | server->tcpStatus == CifsNew || | |
f6d76178 | 456 | (server->ops->can_echo && !server->ops->can_echo(server)) || |
adfeb3e0 | 457 | time_before(jiffies, server->lstrp + echo_interval - HZ)) |
c74093b6 JL |
458 | goto requeue_echo; |
459 | ||
f6d76178 | 460 | rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS; |
c74093b6 | 461 | if (rc) |
f96637be JP |
462 | cifs_dbg(FYI, "Unable to send echo request to server: %s\n", |
463 | server->hostname); | |
c74093b6 JL |
464 | |
465 | requeue_echo: | |
b8c60012 | 466 | queue_delayed_work(cifsiod_wq, &server->echo, server->echo_interval); |
c74093b6 JL |
467 | } |
468 | ||
3d9c2472 | 469 | static bool |
2a37ef94 | 470 | allocate_buffers(struct TCP_Server_Info *server) |
3d9c2472 | 471 | { |
2a37ef94 JL |
472 | if (!server->bigbuf) { |
473 | server->bigbuf = (char *)cifs_buf_get(); | |
474 | if (!server->bigbuf) { | |
f96637be | 475 | cifs_dbg(VFS, "No memory for large SMB response\n"); |
3d9c2472 PS |
476 | msleep(3000); |
477 | /* retry will check if exiting */ | |
478 | return false; | |
479 | } | |
2a37ef94 | 480 | } else if (server->large_buf) { |
3d9c2472 | 481 | /* we are reusing a dirty large buf, clear its start */ |
1887f601 | 482 | memset(server->bigbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
483 | } |
484 | ||
2a37ef94 JL |
485 | if (!server->smallbuf) { |
486 | server->smallbuf = (char *)cifs_small_buf_get(); | |
487 | if (!server->smallbuf) { | |
f96637be | 488 | cifs_dbg(VFS, "No memory for SMB response\n"); |
3d9c2472 PS |
489 | msleep(1000); |
490 | /* retry will check if exiting */ | |
491 | return false; | |
492 | } | |
493 | /* beginning of smb buffer is cleared in our buf_get */ | |
494 | } else { | |
495 | /* if existing small buf clear beginning */ | |
1887f601 | 496 | memset(server->smallbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
497 | } |
498 | ||
3d9c2472 PS |
499 | return true; |
500 | } | |
501 | ||
ba749e6d JL |
502 | static bool |
503 | server_unresponsive(struct TCP_Server_Info *server) | |
504 | { | |
6dae51a5 PS |
505 | /* |
506 | * We need to wait 2 echo intervals to make sure we handle such | |
507 | * situations right: | |
508 | * 1s client sends a normal SMB request | |
509 | * 2s client gets a response | |
510 | * 30s echo workqueue job pops, and decides we got a response recently | |
511 | * and don't need to send another | |
512 | * ... | |
513 | * 65s kernel_recvmsg times out, and we see that we haven't gotten | |
514 | * a response in >60s. | |
515 | */ | |
516 | if (server->tcpStatus == CifsGood && | |
adfeb3e0 SF |
517 | time_after(jiffies, server->lstrp + 2 * server->echo_interval)) { |
518 | cifs_dbg(VFS, "Server %s has not responded in %lu seconds. Reconnecting...\n", | |
519 | server->hostname, (2 * server->echo_interval) / HZ); | |
ba749e6d JL |
520 | cifs_reconnect(server); |
521 | wake_up(&server->response_q); | |
522 | return true; | |
523 | } | |
524 | ||
525 | return false; | |
526 | } | |
527 | ||
71335664 AV |
528 | static int |
529 | cifs_readv_from_socket(struct TCP_Server_Info *server, struct msghdr *smb_msg) | |
e7015fb1 | 530 | { |
a52c1eb7 JL |
531 | int length = 0; |
532 | int total_read; | |
e7015fb1 | 533 | |
71335664 AV |
534 | smb_msg->msg_control = NULL; |
535 | smb_msg->msg_controllen = 0; | |
e831e6cf | 536 | |
71335664 | 537 | for (total_read = 0; msg_data_left(smb_msg); total_read += length) { |
95edcff4 JL |
538 | try_to_freeze(); |
539 | ||
71335664 AV |
540 | if (server_unresponsive(server)) |
541 | return -ECONNABORTED; | |
ba749e6d | 542 | |
71335664 | 543 | length = sock_recvmsg(server->ssocket, smb_msg, 0); |
42c4dfc2 | 544 | |
71335664 AV |
545 | if (server->tcpStatus == CifsExiting) |
546 | return -ESHUTDOWN; | |
e7015fb1 | 547 | |
71335664 | 548 | if (server->tcpStatus == CifsNeedReconnect) { |
e7015fb1 | 549 | cifs_reconnect(server); |
71335664 AV |
550 | return -ECONNABORTED; |
551 | } | |
552 | ||
553 | if (length == -ERESTARTSYS || | |
554 | length == -EAGAIN || | |
555 | length == -EINTR) { | |
e7015fb1 PS |
556 | /* |
557 | * Minimum sleep to prevent looping, allowing socket | |
558 | * to clear and app threads to set tcpStatus | |
559 | * CifsNeedReconnect if server hung. | |
560 | */ | |
561 | usleep_range(1000, 2000); | |
562 | length = 0; | |
a52c1eb7 | 563 | continue; |
71335664 AV |
564 | } |
565 | ||
566 | if (length <= 0) { | |
09aab880 | 567 | cifs_dbg(FYI, "Received no data or error: %d\n", length); |
e7015fb1 | 568 | cifs_reconnect(server); |
71335664 | 569 | return -ECONNABORTED; |
e7015fb1 PS |
570 | } |
571 | } | |
a52c1eb7 | 572 | return total_read; |
e7015fb1 | 573 | } |
e7015fb1 | 574 | |
e28bc5b1 JL |
575 | int |
576 | cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, | |
577 | unsigned int to_read) | |
42c4dfc2 | 578 | { |
71335664 AV |
579 | struct msghdr smb_msg; |
580 | struct kvec iov = {.iov_base = buf, .iov_len = to_read}; | |
581 | iov_iter_kvec(&smb_msg.msg_iter, READ | ITER_KVEC, &iov, 1, to_read); | |
42c4dfc2 | 582 | |
71335664 AV |
583 | return cifs_readv_from_socket(server, &smb_msg); |
584 | } | |
42c4dfc2 | 585 | |
71335664 AV |
586 | int |
587 | cifs_read_page_from_socket(struct TCP_Server_Info *server, struct page *page, | |
588 | unsigned int to_read) | |
589 | { | |
590 | struct msghdr smb_msg; | |
591 | struct bio_vec bv = {.bv_page = page, .bv_len = to_read}; | |
592 | iov_iter_bvec(&smb_msg.msg_iter, READ | ITER_BVEC, &bv, 1, to_read); | |
593 | return cifs_readv_from_socket(server, &smb_msg); | |
e7015fb1 PS |
594 | } |
595 | ||
98bac62c | 596 | static bool |
fe11e4cc | 597 | is_smb_response(struct TCP_Server_Info *server, unsigned char type) |
98bac62c | 598 | { |
98bac62c PS |
599 | /* |
600 | * The first byte big endian of the length field, | |
601 | * is actually not part of the length but the type | |
602 | * with the most common, zero, as regular data. | |
603 | */ | |
fe11e4cc JL |
604 | switch (type) { |
605 | case RFC1002_SESSION_MESSAGE: | |
606 | /* Regular SMB response */ | |
607 | return true; | |
608 | case RFC1002_SESSION_KEEP_ALIVE: | |
f96637be | 609 | cifs_dbg(FYI, "RFC 1002 session keep alive\n"); |
fe11e4cc JL |
610 | break; |
611 | case RFC1002_POSITIVE_SESSION_RESPONSE: | |
f96637be | 612 | cifs_dbg(FYI, "RFC 1002 positive session response\n"); |
fe11e4cc JL |
613 | break; |
614 | case RFC1002_NEGATIVE_SESSION_RESPONSE: | |
98bac62c PS |
615 | /* |
616 | * We get this from Windows 98 instead of an error on | |
617 | * SMB negprot response. | |
618 | */ | |
f96637be | 619 | cifs_dbg(FYI, "RFC 1002 negative session response\n"); |
98bac62c PS |
620 | /* give server a second to clean up */ |
621 | msleep(1000); | |
622 | /* | |
623 | * Always try 445 first on reconnect since we get NACK | |
624 | * on some if we ever connected to port 139 (the NACK | |
625 | * is since we do not begin with RFC1001 session | |
626 | * initialize frame). | |
627 | */ | |
fe11e4cc | 628 | cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT); |
98bac62c PS |
629 | cifs_reconnect(server); |
630 | wake_up(&server->response_q); | |
fe11e4cc JL |
631 | break; |
632 | default: | |
f96637be | 633 | cifs_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type); |
98bac62c | 634 | cifs_reconnect(server); |
98bac62c PS |
635 | } |
636 | ||
fe11e4cc | 637 | return false; |
98bac62c PS |
638 | } |
639 | ||
e28bc5b1 JL |
640 | void |
641 | dequeue_mid(struct mid_q_entry *mid, bool malformed) | |
ea1f4502 | 642 | { |
ad69bae1 | 643 | #ifdef CONFIG_CIFS_STATS2 |
ea1f4502 | 644 | mid->when_received = jiffies; |
ad69bae1 | 645 | #endif |
ea1f4502 JL |
646 | spin_lock(&GlobalMid_Lock); |
647 | if (!malformed) | |
7c9421e1 | 648 | mid->mid_state = MID_RESPONSE_RECEIVED; |
ea1f4502 | 649 | else |
7c9421e1 | 650 | mid->mid_state = MID_RESPONSE_MALFORMED; |
ea1f4502 | 651 | list_del_init(&mid->qhead); |
ad69bae1 | 652 | spin_unlock(&GlobalMid_Lock); |
ea1f4502 | 653 | } |
ad69bae1 | 654 | |
c8054ebd JL |
655 | static void |
656 | handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, | |
d4e4854f | 657 | char *buf, int malformed) |
ea1f4502 | 658 | { |
316cf94a PS |
659 | if (server->ops->check_trans2 && |
660 | server->ops->check_trans2(mid, server, buf, malformed)) | |
c8054ebd | 661 | return; |
ea1f4502 | 662 | mid->resp_buf = buf; |
7c9421e1 | 663 | mid->large_buf = server->large_buf; |
2a37ef94 JL |
664 | /* Was previous buf put in mpx struct for multi-rsp? */ |
665 | if (!mid->multiRsp) { | |
666 | /* smb buffer will be freed by user thread */ | |
667 | if (server->large_buf) | |
668 | server->bigbuf = NULL; | |
669 | else | |
670 | server->smallbuf = NULL; | |
671 | } | |
ffc00e27 | 672 | dequeue_mid(mid, malformed); |
ad69bae1 PS |
673 | } |
674 | ||
762dfd10 PS |
675 | static void clean_demultiplex_info(struct TCP_Server_Info *server) |
676 | { | |
677 | int length; | |
678 | ||
679 | /* take it off the list, if it's not already */ | |
680 | spin_lock(&cifs_tcp_ses_lock); | |
681 | list_del_init(&server->tcp_ses_list); | |
682 | spin_unlock(&cifs_tcp_ses_lock); | |
683 | ||
684 | spin_lock(&GlobalMid_Lock); | |
685 | server->tcpStatus = CifsExiting; | |
686 | spin_unlock(&GlobalMid_Lock); | |
687 | wake_up_all(&server->response_q); | |
688 | ||
2d86dbc9 | 689 | /* check if we have blocked requests that need to free */ |
fc40f9cf | 690 | spin_lock(&server->req_lock); |
2d86dbc9 PS |
691 | if (server->credits <= 0) |
692 | server->credits = 1; | |
fc40f9cf | 693 | spin_unlock(&server->req_lock); |
762dfd10 PS |
694 | /* |
695 | * Although there should not be any requests blocked on this queue it | |
696 | * can not hurt to be paranoid and try to wake up requests that may | |
697 | * haven been blocked when more than 50 at time were on the wire to the | |
698 | * same server - they now will see the session is in exit state and get | |
699 | * out of SendReceive. | |
700 | */ | |
701 | wake_up_all(&server->request_q); | |
702 | /* give those requests time to exit */ | |
703 | msleep(125); | |
704 | ||
705 | if (server->ssocket) { | |
706 | sock_release(server->ssocket); | |
707 | server->ssocket = NULL; | |
708 | } | |
709 | ||
710 | if (!list_empty(&server->pending_mid_q)) { | |
711 | struct list_head dispose_list; | |
712 | struct mid_q_entry *mid_entry; | |
713 | struct list_head *tmp, *tmp2; | |
714 | ||
715 | INIT_LIST_HEAD(&dispose_list); | |
716 | spin_lock(&GlobalMid_Lock); | |
717 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { | |
718 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
f96637be | 719 | cifs_dbg(FYI, "Clearing mid 0x%llx\n", mid_entry->mid); |
7c9421e1 | 720 | mid_entry->mid_state = MID_SHUTDOWN; |
762dfd10 PS |
721 | list_move(&mid_entry->qhead, &dispose_list); |
722 | } | |
723 | spin_unlock(&GlobalMid_Lock); | |
724 | ||
725 | /* now walk dispose list and issue callbacks */ | |
726 | list_for_each_safe(tmp, tmp2, &dispose_list) { | |
727 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
f96637be | 728 | cifs_dbg(FYI, "Callback mid 0x%llx\n", mid_entry->mid); |
762dfd10 PS |
729 | list_del_init(&mid_entry->qhead); |
730 | mid_entry->callback(mid_entry); | |
731 | } | |
732 | /* 1/8th of sec is more than enough time for them to exit */ | |
733 | msleep(125); | |
734 | } | |
735 | ||
736 | if (!list_empty(&server->pending_mid_q)) { | |
737 | /* | |
738 | * mpx threads have not exited yet give them at least the smb | |
739 | * send timeout time for long ops. | |
740 | * | |
741 | * Due to delays on oplock break requests, we need to wait at | |
742 | * least 45 seconds before giving up on a request getting a | |
743 | * response and going ahead and killing cifsd. | |
744 | */ | |
f96637be | 745 | cifs_dbg(FYI, "Wait for exit from demultiplex thread\n"); |
762dfd10 PS |
746 | msleep(46000); |
747 | /* | |
748 | * If threads still have not exited they are probably never | |
749 | * coming home not much else we can do but free the memory. | |
750 | */ | |
751 | } | |
752 | ||
753 | kfree(server->hostname); | |
754 | kfree(server); | |
755 | ||
756 | length = atomic_dec_return(&tcpSesAllocCount); | |
757 | if (length > 0) | |
11d83360 | 758 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv); |
762dfd10 PS |
759 | } |
760 | ||
e9097ab4 JL |
761 | static int |
762 | standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
763 | { | |
764 | int length; | |
765 | char *buf = server->smallbuf; | |
d4e4854f | 766 | unsigned int pdu_length = get_rfc1002_length(buf); |
e9097ab4 JL |
767 | |
768 | /* make sure this will fit in a large buffer */ | |
1887f601 | 769 | if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) { |
f96637be | 770 | cifs_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length); |
e9097ab4 JL |
771 | cifs_reconnect(server); |
772 | wake_up(&server->response_q); | |
3fabaa27 | 773 | return -ECONNABORTED; |
e9097ab4 JL |
774 | } |
775 | ||
776 | /* switch to large buffer if too big for a small one */ | |
777 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { | |
778 | server->large_buf = true; | |
d4e4854f | 779 | memcpy(server->bigbuf, buf, server->total_read); |
e9097ab4 | 780 | buf = server->bigbuf; |
e9097ab4 JL |
781 | } |
782 | ||
783 | /* now read the rest */ | |
1887f601 PS |
784 | length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, |
785 | pdu_length - HEADER_SIZE(server) + 1 + 4); | |
e9097ab4 JL |
786 | if (length < 0) |
787 | return length; | |
788 | server->total_read += length; | |
789 | ||
d4e4854f | 790 | dump_smb(buf, server->total_read); |
e9097ab4 | 791 | |
4326ed2f PS |
792 | return cifs_handle_standard(server, mid); |
793 | } | |
794 | ||
795 | int | |
796 | cifs_handle_standard(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
797 | { | |
798 | char *buf = server->large_buf ? server->bigbuf : server->smallbuf; | |
799 | int length; | |
800 | ||
e9097ab4 JL |
801 | /* |
802 | * We know that we received enough to get to the MID as we | |
803 | * checked the pdu_length earlier. Now check to see | |
804 | * if the rest of the header is OK. We borrow the length | |
805 | * var for the rest of the loop to avoid a new stack var. | |
806 | * | |
807 | * 48 bytes is enough to display the header and a little bit | |
808 | * into the payload for debugging purposes. | |
809 | */ | |
373512ec | 810 | length = server->ops->check_message(buf, server->total_read, server); |
e9097ab4 JL |
811 | if (length != 0) |
812 | cifs_dump_mem("Bad SMB: ", buf, | |
813 | min_t(unsigned int, server->total_read, 48)); | |
814 | ||
2e44b288 PS |
815 | if (server->ops->is_status_pending && |
816 | server->ops->is_status_pending(buf, server, length)) | |
817 | return -1; | |
818 | ||
ff4fa4a2 JL |
819 | if (!mid) |
820 | return length; | |
e9097ab4 | 821 | |
d4e4854f | 822 | handle_mid(mid, server, buf, length); |
ff4fa4a2 | 823 | return 0; |
e9097ab4 JL |
824 | } |
825 | ||
1da177e4 | 826 | static int |
7c97c200 | 827 | cifs_demultiplex_thread(void *p) |
1da177e4 LT |
828 | { |
829 | int length; | |
7c97c200 | 830 | struct TCP_Server_Info *server = p; |
2a37ef94 JL |
831 | unsigned int pdu_length; |
832 | char *buf = NULL; | |
a5c3e1c7 | 833 | struct task_struct *task_to_wake = NULL; |
1da177e4 | 834 | struct mid_q_entry *mid_entry; |
1da177e4 | 835 | |
1da177e4 | 836 | current->flags |= PF_MEMALLOC; |
f96637be | 837 | cifs_dbg(FYI, "Demultiplex PID: %d\n", task_pid_nr(current)); |
93d0ec85 JL |
838 | |
839 | length = atomic_inc_return(&tcpSesAllocCount); | |
840 | if (length > 1) | |
11d83360 | 841 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv); |
1da177e4 | 842 | |
83144186 | 843 | set_freezable(); |
469ee614 | 844 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
845 | if (try_to_freeze()) |
846 | continue; | |
b8643e1b | 847 | |
2a37ef94 | 848 | if (!allocate_buffers(server)) |
3d9c2472 | 849 | continue; |
b8643e1b | 850 | |
2a37ef94 | 851 | server->large_buf = false; |
2a37ef94 | 852 | buf = server->smallbuf; |
f01d5e14 | 853 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 854 | |
e28bc5b1 | 855 | length = cifs_read_from_socket(server, buf, pdu_length); |
a52c1eb7 | 856 | if (length < 0) |
1da177e4 | 857 | continue; |
2a37ef94 | 858 | server->total_read = length; |
1da177e4 | 859 | |
98bac62c PS |
860 | /* |
861 | * The right amount was read from socket - 4 bytes, | |
862 | * so we can now interpret the length field. | |
863 | */ | |
d4e4854f | 864 | pdu_length = get_rfc1002_length(buf); |
70ca734a | 865 | |
f96637be | 866 | cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length); |
fe11e4cc | 867 | if (!is_smb_response(server, buf[0])) |
fb8c4b14 | 868 | continue; |
e4eb295d | 869 | |
89482a56 | 870 | /* make sure we have enough to get to the MID */ |
1887f601 | 871 | if (pdu_length < HEADER_SIZE(server) - 1 - 4) { |
f96637be JP |
872 | cifs_dbg(VFS, "SMB response too short (%u bytes)\n", |
873 | pdu_length); | |
89482a56 JL |
874 | cifs_reconnect(server); |
875 | wake_up(&server->response_q); | |
876 | continue; | |
e4eb295d | 877 | } |
e7015fb1 | 878 | |
89482a56 | 879 | /* read down to the MID */ |
e28bc5b1 | 880 | length = cifs_read_from_socket(server, buf + 4, |
1887f601 | 881 | HEADER_SIZE(server) - 1 - 4); |
89482a56 | 882 | if (length < 0) |
e4eb295d | 883 | continue; |
2a37ef94 | 884 | server->total_read += length; |
1da177e4 | 885 | |
9bb17e09 PS |
886 | if (server->ops->is_transform_hdr && |
887 | server->ops->receive_transform && | |
888 | server->ops->is_transform_hdr(buf)) { | |
889 | length = server->ops->receive_transform(server, | |
890 | &mid_entry); | |
891 | } else { | |
892 | mid_entry = server->ops->find_mid(server, buf); | |
50c2f753 | 893 | |
9bb17e09 PS |
894 | if (!mid_entry || !mid_entry->receive) |
895 | length = standard_receive3(server, mid_entry); | |
896 | else | |
897 | length = mid_entry->receive(server, mid_entry); | |
898 | } | |
71823baf | 899 | |
e9097ab4 | 900 | if (length < 0) |
fe11e4cc | 901 | continue; |
1da177e4 | 902 | |
d4e4854f | 903 | if (server->large_buf) |
2a37ef94 | 904 | buf = server->bigbuf; |
fda35943 | 905 | |
fda35943 | 906 | server->lstrp = jiffies; |
2b84a36c | 907 | if (mid_entry != NULL) { |
38bd4906 SP |
908 | if ((mid_entry->mid_flags & MID_WAIT_CANCELLED) && |
909 | mid_entry->mid_state == MID_RESPONSE_RECEIVED && | |
910 | server->ops->handle_cancelled_mid) | |
911 | server->ops->handle_cancelled_mid( | |
912 | mid_entry->resp_buf, | |
913 | server); | |
914 | ||
2a37ef94 JL |
915 | if (!mid_entry->multiRsp || mid_entry->multiEnd) |
916 | mid_entry->callback(mid_entry); | |
38bd4906 SP |
917 | } else if (server->ops->is_oplock_break && |
918 | server->ops->is_oplock_break(buf, server)) { | |
919 | cifs_dbg(FYI, "Received oplock break\n"); | |
920 | } else { | |
f96637be JP |
921 | cifs_dbg(VFS, "No task to wake, unknown frame received! NumMids %d\n", |
922 | atomic_read(&midCount)); | |
1887f601 PS |
923 | cifs_dump_mem("Received Data is: ", buf, |
924 | HEADER_SIZE(server)); | |
3979877e | 925 | #ifdef CONFIG_CIFS_DEBUG2 |
7f0adb53 PS |
926 | if (server->ops->dump_detail) |
927 | server->ops->dump_detail(buf); | |
3979877e SF |
928 | cifs_dump_mids(server); |
929 | #endif /* CIFS_DEBUG2 */ | |
50c2f753 | 930 | |
e4eb295d SF |
931 | } |
932 | } /* end while !EXITING */ | |
933 | ||
fd62cb7e | 934 | /* buffer usually freed in free_mid - need to free it here on exit */ |
2a37ef94 JL |
935 | cifs_buf_release(server->bigbuf); |
936 | if (server->smallbuf) /* no sense logging a debug message if NULL */ | |
937 | cifs_small_buf_release(server->smallbuf); | |
1da177e4 | 938 | |
a5c3e1c7 | 939 | task_to_wake = xchg(&server->tsk, NULL); |
762dfd10 | 940 | clean_demultiplex_info(server); |
a5c3e1c7 SF |
941 | |
942 | /* if server->tsk was NULL then wait for a signal before exiting */ | |
943 | if (!task_to_wake) { | |
944 | set_current_state(TASK_INTERRUPTIBLE); | |
945 | while (!signal_pending(current)) { | |
946 | schedule(); | |
947 | set_current_state(TASK_INTERRUPTIBLE); | |
948 | } | |
949 | set_current_state(TASK_RUNNING); | |
950 | } | |
951 | ||
0468a2cf | 952 | module_put_and_exit(0); |
1da177e4 LT |
953 | } |
954 | ||
c359cf3c JL |
955 | /* extract the host portion of the UNC string */ |
956 | static char * | |
957 | extract_hostname(const char *unc) | |
958 | { | |
959 | const char *src; | |
960 | char *dst, *delim; | |
961 | unsigned int len; | |
962 | ||
963 | /* skip double chars at beginning of string */ | |
964 | /* BB: check validity of these bytes? */ | |
965 | src = unc + 2; | |
966 | ||
967 | /* delimiter between hostname and sharename is always '\\' now */ | |
968 | delim = strchr(src, '\\'); | |
969 | if (!delim) | |
970 | return ERR_PTR(-EINVAL); | |
971 | ||
972 | len = delim - src; | |
973 | dst = kmalloc((len + 1), GFP_KERNEL); | |
974 | if (dst == NULL) | |
975 | return ERR_PTR(-ENOMEM); | |
976 | ||
977 | memcpy(dst, src, len); | |
978 | dst[len] = '\0'; | |
979 | ||
980 | return dst; | |
981 | } | |
982 | ||
8830d7e0 SP |
983 | static int get_option_ul(substring_t args[], unsigned long *option) |
984 | { | |
985 | int rc; | |
986 | char *string; | |
987 | ||
988 | string = match_strdup(args); | |
989 | if (string == NULL) | |
990 | return -ENOMEM; | |
bfa890a3 | 991 | rc = kstrtoul(string, 0, option); |
8830d7e0 SP |
992 | kfree(string); |
993 | ||
994 | return rc; | |
995 | } | |
996 | ||
3da46565 EB |
997 | static int get_option_uid(substring_t args[], kuid_t *result) |
998 | { | |
999 | unsigned long value; | |
1000 | kuid_t uid; | |
1001 | int rc; | |
1002 | ||
1003 | rc = get_option_ul(args, &value); | |
1004 | if (rc) | |
1005 | return rc; | |
1006 | ||
1007 | uid = make_kuid(current_user_ns(), value); | |
1008 | if (!uid_valid(uid)) | |
1009 | return -EINVAL; | |
1010 | ||
1011 | *result = uid; | |
1012 | return 0; | |
1013 | } | |
1014 | ||
1015 | static int get_option_gid(substring_t args[], kgid_t *result) | |
1016 | { | |
1017 | unsigned long value; | |
1018 | kgid_t gid; | |
1019 | int rc; | |
1020 | ||
1021 | rc = get_option_ul(args, &value); | |
1022 | if (rc) | |
1023 | return rc; | |
1024 | ||
1025 | gid = make_kgid(current_user_ns(), value); | |
1026 | if (!gid_valid(gid)) | |
1027 | return -EINVAL; | |
1028 | ||
1029 | *result = gid; | |
1030 | return 0; | |
1031 | } | |
8830d7e0 SP |
1032 | |
1033 | static int cifs_parse_security_flavors(char *value, | |
1034 | struct smb_vol *vol) | |
1035 | { | |
1036 | ||
1037 | substring_t args[MAX_OPT_ARGS]; | |
1038 | ||
1e3cc57e JL |
1039 | /* |
1040 | * With mount options, the last one should win. Reset any existing | |
1041 | * settings back to default. | |
1042 | */ | |
1043 | vol->sectype = Unspecified; | |
1044 | vol->sign = false; | |
1045 | ||
8830d7e0 | 1046 | switch (match_token(value, cifs_secflavor_tokens, args)) { |
3f618223 JL |
1047 | case Opt_sec_krb5p: |
1048 | cifs_dbg(VFS, "sec=krb5p is not supported!\n"); | |
1049 | return 1; | |
1050 | case Opt_sec_krb5i: | |
1051 | vol->sign = true; | |
1052 | /* Fallthrough */ | |
8830d7e0 | 1053 | case Opt_sec_krb5: |
1e3cc57e | 1054 | vol->sectype = Kerberos; |
8830d7e0 | 1055 | break; |
3f618223 | 1056 | case Opt_sec_ntlmsspi: |
1e3cc57e | 1057 | vol->sign = true; |
3f618223 | 1058 | /* Fallthrough */ |
8830d7e0 | 1059 | case Opt_sec_ntlmssp: |
1e3cc57e | 1060 | vol->sectype = RawNTLMSSP; |
8830d7e0 | 1061 | break; |
3f618223 | 1062 | case Opt_sec_ntlmi: |
1e3cc57e | 1063 | vol->sign = true; |
3f618223 | 1064 | /* Fallthrough */ |
8830d7e0 | 1065 | case Opt_ntlm: |
1e3cc57e | 1066 | vol->sectype = NTLM; |
8830d7e0 | 1067 | break; |
3f618223 | 1068 | case Opt_sec_ntlmv2i: |
1e3cc57e | 1069 | vol->sign = true; |
3f618223 | 1070 | /* Fallthrough */ |
7659624f | 1071 | case Opt_sec_ntlmv2: |
1e3cc57e | 1072 | vol->sectype = NTLMv2; |
8830d7e0 SP |
1073 | break; |
1074 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
1075 | case Opt_sec_lanman: | |
1e3cc57e | 1076 | vol->sectype = LANMAN; |
8830d7e0 SP |
1077 | break; |
1078 | #endif | |
1079 | case Opt_sec_none: | |
1080 | vol->nullauth = 1; | |
1081 | break; | |
1082 | default: | |
f96637be | 1083 | cifs_dbg(VFS, "bad security option: %s\n", value); |
8830d7e0 SP |
1084 | return 1; |
1085 | } | |
1086 | ||
1087 | return 0; | |
1088 | } | |
1089 | ||
15b6a473 JL |
1090 | static int |
1091 | cifs_parse_cache_flavor(char *value, struct smb_vol *vol) | |
1092 | { | |
1093 | substring_t args[MAX_OPT_ARGS]; | |
1094 | ||
1095 | switch (match_token(value, cifs_cacheflavor_tokens, args)) { | |
1096 | case Opt_cache_loose: | |
1097 | vol->direct_io = false; | |
1098 | vol->strict_io = false; | |
1099 | break; | |
1100 | case Opt_cache_strict: | |
1101 | vol->direct_io = false; | |
1102 | vol->strict_io = true; | |
1103 | break; | |
1104 | case Opt_cache_none: | |
1105 | vol->direct_io = true; | |
1106 | vol->strict_io = false; | |
1107 | break; | |
1108 | default: | |
f96637be | 1109 | cifs_dbg(VFS, "bad cache= option: %s\n", value); |
15b6a473 JL |
1110 | return 1; |
1111 | } | |
1112 | return 0; | |
1113 | } | |
1114 | ||
23db65f5 JL |
1115 | static int |
1116 | cifs_parse_smb_version(char *value, struct smb_vol *vol) | |
1117 | { | |
1118 | substring_t args[MAX_OPT_ARGS]; | |
1119 | ||
1120 | switch (match_token(value, cifs_smb_version_tokens, args)) { | |
1121 | case Smb_1: | |
1122 | vol->ops = &smb1_operations; | |
1123 | vol->vals = &smb1_values; | |
1124 | break; | |
1080ef75 | 1125 | #ifdef CONFIG_CIFS_SMB2 |
dd446b16 | 1126 | case Smb_20: |
53ef1016 | 1127 | vol->ops = &smb20_operations; |
dd446b16 SF |
1128 | vol->vals = &smb20_values; |
1129 | break; | |
1080ef75 SF |
1130 | case Smb_21: |
1131 | vol->ops = &smb21_operations; | |
1132 | vol->vals = &smb21_values; | |
1133 | break; | |
e4aa25e7 | 1134 | case Smb_30: |
38107d45 | 1135 | vol->ops = &smb30_operations; |
e4aa25e7 SF |
1136 | vol->vals = &smb30_values; |
1137 | break; | |
20b6d8b4 SF |
1138 | case Smb_302: |
1139 | vol->ops = &smb30_operations; /* currently identical with 3.0 */ | |
1140 | vol->vals = &smb302_values; | |
1141 | break; | |
5f7fbf73 SF |
1142 | #ifdef CONFIG_CIFS_SMB311 |
1143 | case Smb_311: | |
aab1893d | 1144 | vol->ops = &smb311_operations; |
5f7fbf73 SF |
1145 | vol->vals = &smb311_values; |
1146 | break; | |
1147 | #endif /* SMB311 */ | |
1080ef75 | 1148 | #endif |
23db65f5 | 1149 | default: |
f96637be | 1150 | cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value); |
23db65f5 JL |
1151 | return 1; |
1152 | } | |
1153 | return 0; | |
1154 | } | |
1155 | ||
d387a5c5 JL |
1156 | /* |
1157 | * Parse a devname into substrings and populate the vol->UNC and vol->prepath | |
1158 | * fields with the result. Returns 0 on success and an error otherwise. | |
1159 | */ | |
1160 | static int | |
1161 | cifs_parse_devname(const char *devname, struct smb_vol *vol) | |
1162 | { | |
1163 | char *pos; | |
1164 | const char *delims = "/\\"; | |
1165 | size_t len; | |
1166 | ||
1167 | /* make sure we have a valid UNC double delimiter prefix */ | |
1168 | len = strspn(devname, delims); | |
1169 | if (len != 2) | |
1170 | return -EINVAL; | |
1171 | ||
1172 | /* find delimiter between host and sharename */ | |
1173 | pos = strpbrk(devname + 2, delims); | |
1174 | if (!pos) | |
1175 | return -EINVAL; | |
1176 | ||
1177 | /* skip past delimiter */ | |
1178 | ++pos; | |
1179 | ||
1180 | /* now go until next delimiter or end of string */ | |
1181 | len = strcspn(pos, delims); | |
1182 | ||
1183 | /* move "pos" up to delimiter or NULL */ | |
1184 | pos += len; | |
1185 | vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL); | |
1186 | if (!vol->UNC) | |
1187 | return -ENOMEM; | |
1188 | ||
1189 | convert_delimiter(vol->UNC, '\\'); | |
1190 | ||
11e31647 SP |
1191 | /* skip any delimiter */ |
1192 | if (*pos == '/' || *pos == '\\') | |
1193 | pos++; | |
1194 | ||
1195 | /* If pos is NULL then no prepath */ | |
1196 | if (!*pos) | |
d387a5c5 JL |
1197 | return 0; |
1198 | ||
1199 | vol->prepath = kstrdup(pos, GFP_KERNEL); | |
1200 | if (!vol->prepath) | |
1201 | return -ENOMEM; | |
1202 | ||
1203 | return 0; | |
1204 | } | |
1205 | ||
1da177e4 | 1206 | static int |
b946845a | 1207 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
50c2f753 | 1208 | struct smb_vol *vol) |
1da177e4 | 1209 | { |
8830d7e0 | 1210 | char *data, *end; |
957df453 | 1211 | char *mountdata_copy = NULL, *options; |
1da177e4 LT |
1212 | unsigned int temp_len, i, j; |
1213 | char separator[2]; | |
9b9d6b24 JL |
1214 | short int override_uid = -1; |
1215 | short int override_gid = -1; | |
1216 | bool uid_specified = false; | |
1217 | bool gid_specified = false; | |
d8162558 JL |
1218 | bool sloppy = false; |
1219 | char *invalid = NULL; | |
88463999 | 1220 | char *nodename = utsname()->nodename; |
8830d7e0 SP |
1221 | char *string = NULL; |
1222 | char *tmp_end, *value; | |
1223 | char delim; | |
b979aaa1 JL |
1224 | bool got_ip = false; |
1225 | unsigned short port = 0; | |
1226 | struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr; | |
1da177e4 LT |
1227 | |
1228 | separator[0] = ','; | |
50c2f753 | 1229 | separator[1] = 0; |
8830d7e0 | 1230 | delim = separator[0]; |
1da177e4 | 1231 | |
6ee9542a JL |
1232 | /* ensure we always start with zeroed-out smb_vol */ |
1233 | memset(vol, 0, sizeof(*vol)); | |
1234 | ||
88463999 JL |
1235 | /* |
1236 | * does not have to be perfect mapping since field is | |
1237 | * informational, only used for servers that do not support | |
1238 | * port 445 and it can be overridden at mount time | |
1239 | */ | |
1397f2ee JL |
1240 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
1241 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
1242 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
1243 | ||
1397f2ee | 1244 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
1245 | /* null target name indicates to use *SMBSERVR default called name |
1246 | if we end up sending RFC1001 session initialize */ | |
1247 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
1248 | vol->cred_uid = current_uid(); |
1249 | vol->linux_uid = current_uid(); | |
a001e5b5 | 1250 | vol->linux_gid = current_gid(); |
f55ed1a8 | 1251 | |
2baa2682 SF |
1252 | /* |
1253 | * default to SFM style remapping of seven reserved characters | |
1254 | * unless user overrides it or we negotiate CIFS POSIX where | |
1255 | * it is unnecessary. Can not simultaneously use more than one mapping | |
1256 | * since then readdir could list files that open could not open | |
1257 | */ | |
1258 | vol->remap = true; | |
1259 | ||
f55ed1a8 JL |
1260 | /* default to only allowing write access to owner of the mount */ |
1261 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
1262 | |
1263 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
1264 | /* default is always to request posix paths. */ |
1265 | vol->posix_paths = 1; | |
a0c9217f JL |
1266 | /* default to using server inode numbers where available */ |
1267 | vol->server_ino = 1; | |
ac67055e | 1268 | |
1b359204 JL |
1269 | /* default is to use strict cifs caching semantics */ |
1270 | vol->strict_io = true; | |
1271 | ||
6d20e840 SJ |
1272 | vol->actimeo = CIFS_DEF_ACTIMEO; |
1273 | ||
23db65f5 JL |
1274 | /* FIXME: add autonegotiation -- for now, SMB1 is default */ |
1275 | vol->ops = &smb1_operations; | |
1276 | vol->vals = &smb1_values; | |
1277 | ||
b782fcc1 RV |
1278 | vol->echo_interval = SMB_ECHO_INTERVAL_DEFAULT; |
1279 | ||
b946845a SF |
1280 | if (!mountdata) |
1281 | goto cifs_parse_mount_err; | |
1282 | ||
1283 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); | |
1284 | if (!mountdata_copy) | |
1285 | goto cifs_parse_mount_err; | |
1da177e4 | 1286 | |
b946845a | 1287 | options = mountdata_copy; |
4906e50b | 1288 | end = options + strlen(options); |
8830d7e0 | 1289 | |
50c2f753 | 1290 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 1291 | if (options[4] != 0) { |
1da177e4 LT |
1292 | separator[0] = options[4]; |
1293 | options += 5; | |
1294 | } else { | |
f96637be | 1295 | cifs_dbg(FYI, "Null separator not allowed\n"); |
1da177e4 LT |
1296 | } |
1297 | } | |
3d3ea8e6 SP |
1298 | vol->backupuid_specified = false; /* no backup intent for a user */ |
1299 | vol->backupgid_specified = false; /* no backup intent for a group */ | |
50c2f753 | 1300 | |
37d4f99b JL |
1301 | switch (cifs_parse_devname(devname, vol)) { |
1302 | case 0: | |
1303 | break; | |
1304 | case -ENOMEM: | |
1305 | cifs_dbg(VFS, "Unable to allocate memory for devname.\n"); | |
1306 | goto cifs_parse_mount_err; | |
1307 | case -EINVAL: | |
1308 | cifs_dbg(VFS, "Malformed UNC in devname.\n"); | |
1309 | goto cifs_parse_mount_err; | |
1310 | default: | |
1311 | cifs_dbg(VFS, "Unknown error parsing devname.\n"); | |
1312 | goto cifs_parse_mount_err; | |
d387a5c5 JL |
1313 | } |
1314 | ||
1da177e4 | 1315 | while ((data = strsep(&options, separator)) != NULL) { |
8830d7e0 SP |
1316 | substring_t args[MAX_OPT_ARGS]; |
1317 | unsigned long option; | |
1318 | int token; | |
1319 | ||
1da177e4 LT |
1320 | if (!*data) |
1321 | continue; | |
1da177e4 | 1322 | |
8830d7e0 SP |
1323 | token = match_token(data, cifs_mount_option_tokens, args); |
1324 | ||
1325 | switch (token) { | |
1326 | ||
1327 | /* Ingnore the following */ | |
1328 | case Opt_ignore: | |
1329 | break; | |
1330 | ||
1331 | /* Boolean values */ | |
1332 | case Opt_user_xattr: | |
1da177e4 | 1333 | vol->no_xattr = 0; |
8830d7e0 SP |
1334 | break; |
1335 | case Opt_nouser_xattr: | |
1da177e4 | 1336 | vol->no_xattr = 1; |
8830d7e0 SP |
1337 | break; |
1338 | case Opt_forceuid: | |
9b9d6b24 | 1339 | override_uid = 1; |
8830d7e0 SP |
1340 | break; |
1341 | case Opt_noforceuid: | |
9b9d6b24 | 1342 | override_uid = 0; |
8830d7e0 | 1343 | break; |
72bd481f JL |
1344 | case Opt_forcegid: |
1345 | override_gid = 1; | |
1346 | break; | |
1347 | case Opt_noforcegid: | |
1348 | override_gid = 0; | |
1349 | break; | |
8830d7e0 | 1350 | case Opt_noblocksend: |
edf1ae40 | 1351 | vol->noblocksnd = 1; |
8830d7e0 SP |
1352 | break; |
1353 | case Opt_noautotune: | |
edf1ae40 | 1354 | vol->noautotune = 1; |
8830d7e0 SP |
1355 | break; |
1356 | case Opt_hard: | |
1da177e4 | 1357 | vol->retry = 1; |
8830d7e0 SP |
1358 | break; |
1359 | case Opt_soft: | |
1da177e4 | 1360 | vol->retry = 0; |
8830d7e0 SP |
1361 | break; |
1362 | case Opt_perm: | |
1da177e4 | 1363 | vol->noperm = 0; |
8830d7e0 SP |
1364 | break; |
1365 | case Opt_noperm: | |
1da177e4 | 1366 | vol->noperm = 1; |
8830d7e0 SP |
1367 | break; |
1368 | case Opt_mapchars: | |
2baa2682 SF |
1369 | vol->sfu_remap = true; |
1370 | vol->remap = false; /* disable SFM mapping */ | |
8830d7e0 SP |
1371 | break; |
1372 | case Opt_nomapchars: | |
2baa2682 SF |
1373 | vol->sfu_remap = false; |
1374 | break; | |
1375 | case Opt_mapposix: | |
1376 | vol->remap = true; | |
1377 | vol->sfu_remap = false; /* disable SFU mapping */ | |
1378 | break; | |
1379 | case Opt_nomapposix: | |
1380 | vol->remap = false; | |
8830d7e0 SP |
1381 | break; |
1382 | case Opt_sfu: | |
50c2f753 | 1383 | vol->sfu_emul = 1; |
8830d7e0 SP |
1384 | break; |
1385 | case Opt_nosfu: | |
50c2f753 | 1386 | vol->sfu_emul = 0; |
8830d7e0 SP |
1387 | break; |
1388 | case Opt_nodfs: | |
2c1b8615 | 1389 | vol->nodfs = 1; |
8830d7e0 SP |
1390 | break; |
1391 | case Opt_posixpaths: | |
ac67055e | 1392 | vol->posix_paths = 1; |
8830d7e0 SP |
1393 | break; |
1394 | case Opt_noposixpaths: | |
ac67055e | 1395 | vol->posix_paths = 0; |
8830d7e0 SP |
1396 | break; |
1397 | case Opt_nounix: | |
c18c842b | 1398 | vol->no_linux_ext = 1; |
8830d7e0 SP |
1399 | break; |
1400 | case Opt_nocase: | |
50c2f753 | 1401 | vol->nocase = 1; |
8830d7e0 SP |
1402 | break; |
1403 | case Opt_brl: | |
c46fa8ac | 1404 | vol->nobrl = 0; |
8830d7e0 SP |
1405 | break; |
1406 | case Opt_nobrl: | |
c46fa8ac | 1407 | vol->nobrl = 1; |
5cfdddcf PS |
1408 | /* |
1409 | * turn off mandatory locking in mode | |
8830d7e0 | 1410 | * if remote locking is turned off since the |
5cfdddcf PS |
1411 | * local vfs will do advisory |
1412 | */ | |
50c2f753 SF |
1413 | if (vol->file_mode == |
1414 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1415 | vol->file_mode = S_IALLUGO; |
8830d7e0 SP |
1416 | break; |
1417 | case Opt_forcemandatorylock: | |
13a6e42a | 1418 | vol->mand_lock = 1; |
8830d7e0 SP |
1419 | break; |
1420 | case Opt_setuids: | |
1da177e4 | 1421 | vol->setuids = 1; |
8830d7e0 SP |
1422 | break; |
1423 | case Opt_nosetuids: | |
1da177e4 | 1424 | vol->setuids = 0; |
8830d7e0 | 1425 | break; |
95932655 SF |
1426 | case Opt_setuidfromacl: |
1427 | vol->setuidfromacl = 1; | |
1428 | break; | |
8830d7e0 | 1429 | case Opt_dynperm: |
d0a9c078 | 1430 | vol->dynperm = true; |
8830d7e0 SP |
1431 | break; |
1432 | case Opt_nodynperm: | |
d0a9c078 | 1433 | vol->dynperm = false; |
8830d7e0 SP |
1434 | break; |
1435 | case Opt_nohard: | |
1da177e4 | 1436 | vol->retry = 0; |
8830d7e0 SP |
1437 | break; |
1438 | case Opt_nosoft: | |
1da177e4 | 1439 | vol->retry = 1; |
8830d7e0 SP |
1440 | break; |
1441 | case Opt_nointr: | |
1da177e4 | 1442 | vol->intr = 0; |
8830d7e0 SP |
1443 | break; |
1444 | case Opt_intr: | |
1da177e4 | 1445 | vol->intr = 1; |
8830d7e0 SP |
1446 | break; |
1447 | case Opt_nostrictsync: | |
be652445 | 1448 | vol->nostrictsync = 1; |
8830d7e0 SP |
1449 | break; |
1450 | case Opt_strictsync: | |
be652445 | 1451 | vol->nostrictsync = 0; |
8830d7e0 SP |
1452 | break; |
1453 | case Opt_serverino: | |
1da177e4 | 1454 | vol->server_ino = 1; |
8830d7e0 SP |
1455 | break; |
1456 | case Opt_noserverino: | |
1da177e4 | 1457 | vol->server_ino = 0; |
8830d7e0 SP |
1458 | break; |
1459 | case Opt_rwpidforward: | |
d4ffff1f | 1460 | vol->rwpidforward = 1; |
8830d7e0 SP |
1461 | break; |
1462 | case Opt_cifsacl: | |
0a4b92c0 | 1463 | vol->cifs_acl = 1; |
8830d7e0 SP |
1464 | break; |
1465 | case Opt_nocifsacl: | |
0a4b92c0 | 1466 | vol->cifs_acl = 0; |
8830d7e0 SP |
1467 | break; |
1468 | case Opt_acl: | |
1da177e4 | 1469 | vol->no_psx_acl = 0; |
8830d7e0 SP |
1470 | break; |
1471 | case Opt_noacl: | |
1da177e4 | 1472 | vol->no_psx_acl = 1; |
8830d7e0 SP |
1473 | break; |
1474 | case Opt_locallease: | |
84210e91 | 1475 | vol->local_lease = 1; |
8830d7e0 SP |
1476 | break; |
1477 | case Opt_sign: | |
1e3cc57e | 1478 | vol->sign = true; |
8830d7e0 SP |
1479 | break; |
1480 | case Opt_seal: | |
95b1cb90 | 1481 | /* we do not do the following in secFlags because seal |
8830d7e0 SP |
1482 | * is a per tree connection (mount) not a per socket |
1483 | * or per-smb connection option in the protocol | |
1484 | * vol->secFlg |= CIFSSEC_MUST_SEAL; | |
1485 | */ | |
95b1cb90 | 1486 | vol->seal = 1; |
8830d7e0 | 1487 | break; |
8830d7e0 | 1488 | case Opt_noac: |
0b456f04 | 1489 | pr_warn("CIFS: Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n"); |
8830d7e0 SP |
1490 | break; |
1491 | case Opt_fsc: | |
607a569d | 1492 | #ifndef CONFIG_CIFS_FSCACHE |
f96637be | 1493 | cifs_dbg(VFS, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n"); |
b946845a | 1494 | goto cifs_parse_mount_err; |
607a569d | 1495 | #endif |
fa1df75d | 1496 | vol->fsc = true; |
8830d7e0 SP |
1497 | break; |
1498 | case Opt_mfsymlinks: | |
736a3320 | 1499 | vol->mfsymlinks = true; |
8830d7e0 SP |
1500 | break; |
1501 | case Opt_multiuser: | |
0eb8a132 | 1502 | vol->multiuser = true; |
8830d7e0 | 1503 | break; |
d8162558 JL |
1504 | case Opt_sloppy: |
1505 | sloppy = true; | |
1506 | break; | |
a0b3df5c JL |
1507 | case Opt_nosharesock: |
1508 | vol->nosharesock = true; | |
1509 | break; | |
b2a30774 SF |
1510 | case Opt_nopersistent: |
1511 | vol->nopersistent = true; | |
1512 | if (vol->persistent) { | |
1513 | cifs_dbg(VFS, | |
1514 | "persistenthandles mount options conflict\n"); | |
1515 | goto cifs_parse_mount_err; | |
1516 | } | |
1517 | break; | |
1518 | case Opt_persistent: | |
1519 | vol->persistent = true; | |
592fafe6 | 1520 | if ((vol->nopersistent) || (vol->resilient)) { |
b2a30774 SF |
1521 | cifs_dbg(VFS, |
1522 | "persistenthandles mount options conflict\n"); | |
1523 | goto cifs_parse_mount_err; | |
1524 | } | |
1525 | break; | |
592fafe6 SF |
1526 | case Opt_resilient: |
1527 | vol->resilient = true; | |
1528 | if (vol->persistent) { | |
1529 | cifs_dbg(VFS, | |
1530 | "persistenthandles mount options conflict\n"); | |
1531 | goto cifs_parse_mount_err; | |
1532 | } | |
1533 | break; | |
1534 | case Opt_noresilient: | |
1535 | vol->resilient = false; /* already the default */ | |
1536 | break; | |
39566443 GP |
1537 | case Opt_domainauto: |
1538 | vol->domainauto = true; | |
1539 | break; | |
8830d7e0 SP |
1540 | |
1541 | /* Numeric Values */ | |
1542 | case Opt_backupuid: | |
3da46565 | 1543 | if (get_option_uid(args, &vol->backupuid)) { |
f96637be JP |
1544 | cifs_dbg(VFS, "%s: Invalid backupuid value\n", |
1545 | __func__); | |
3d3ea8e6 SP |
1546 | goto cifs_parse_mount_err; |
1547 | } | |
1548 | vol->backupuid_specified = true; | |
8830d7e0 SP |
1549 | break; |
1550 | case Opt_backupgid: | |
3da46565 | 1551 | if (get_option_gid(args, &vol->backupgid)) { |
f96637be JP |
1552 | cifs_dbg(VFS, "%s: Invalid backupgid value\n", |
1553 | __func__); | |
3d3ea8e6 SP |
1554 | goto cifs_parse_mount_err; |
1555 | } | |
1556 | vol->backupgid_specified = true; | |
8830d7e0 SP |
1557 | break; |
1558 | case Opt_uid: | |
3da46565 | 1559 | if (get_option_uid(args, &vol->linux_uid)) { |
f96637be JP |
1560 | cifs_dbg(VFS, "%s: Invalid uid value\n", |
1561 | __func__); | |
8830d7e0 SP |
1562 | goto cifs_parse_mount_err; |
1563 | } | |
8830d7e0 SP |
1564 | uid_specified = true; |
1565 | break; | |
1566 | case Opt_cruid: | |
3da46565 | 1567 | if (get_option_uid(args, &vol->cred_uid)) { |
f96637be JP |
1568 | cifs_dbg(VFS, "%s: Invalid cruid value\n", |
1569 | __func__); | |
8830d7e0 SP |
1570 | goto cifs_parse_mount_err; |
1571 | } | |
8830d7e0 SP |
1572 | break; |
1573 | case Opt_gid: | |
3da46565 | 1574 | if (get_option_gid(args, &vol->linux_gid)) { |
f96637be JP |
1575 | cifs_dbg(VFS, "%s: Invalid gid value\n", |
1576 | __func__); | |
8830d7e0 SP |
1577 | goto cifs_parse_mount_err; |
1578 | } | |
8830d7e0 SP |
1579 | gid_specified = true; |
1580 | break; | |
1581 | case Opt_file_mode: | |
1582 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1583 | cifs_dbg(VFS, "%s: Invalid file_mode value\n", |
1584 | __func__); | |
8830d7e0 SP |
1585 | goto cifs_parse_mount_err; |
1586 | } | |
1587 | vol->file_mode = option; | |
1588 | break; | |
1589 | case Opt_dirmode: | |
1590 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1591 | cifs_dbg(VFS, "%s: Invalid dir_mode value\n", |
1592 | __func__); | |
8830d7e0 SP |
1593 | goto cifs_parse_mount_err; |
1594 | } | |
1595 | vol->dir_mode = option; | |
1596 | break; | |
1597 | case Opt_port: | |
b979aaa1 JL |
1598 | if (get_option_ul(args, &option) || |
1599 | option > USHRT_MAX) { | |
f96637be JP |
1600 | cifs_dbg(VFS, "%s: Invalid port value\n", |
1601 | __func__); | |
8830d7e0 SP |
1602 | goto cifs_parse_mount_err; |
1603 | } | |
b979aaa1 | 1604 | port = (unsigned short)option; |
8830d7e0 SP |
1605 | break; |
1606 | case Opt_rsize: | |
1607 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1608 | cifs_dbg(VFS, "%s: Invalid rsize value\n", |
1609 | __func__); | |
b946845a | 1610 | goto cifs_parse_mount_err; |
8830d7e0 SP |
1611 | } |
1612 | vol->rsize = option; | |
1613 | break; | |
1614 | case Opt_wsize: | |
1615 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1616 | cifs_dbg(VFS, "%s: Invalid wsize value\n", |
1617 | __func__); | |
8830d7e0 SP |
1618 | goto cifs_parse_mount_err; |
1619 | } | |
1620 | vol->wsize = option; | |
1621 | break; | |
1622 | case Opt_actimeo: | |
1623 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1624 | cifs_dbg(VFS, "%s: Invalid actimeo value\n", |
1625 | __func__); | |
8830d7e0 SP |
1626 | goto cifs_parse_mount_err; |
1627 | } | |
1628 | vol->actimeo = HZ * option; | |
1629 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
f96637be | 1630 | cifs_dbg(VFS, "attribute cache timeout too large\n"); |
8830d7e0 SP |
1631 | goto cifs_parse_mount_err; |
1632 | } | |
1633 | break; | |
adfeb3e0 SF |
1634 | case Opt_echo_interval: |
1635 | if (get_option_ul(args, &option)) { | |
1636 | cifs_dbg(VFS, "%s: Invalid echo interval value\n", | |
1637 | __func__); | |
1638 | goto cifs_parse_mount_err; | |
1639 | } | |
1640 | vol->echo_interval = option; | |
1641 | break; | |
8b217fe7 SF |
1642 | case Opt_snapshot: |
1643 | if (get_option_ul(args, &option)) { | |
1644 | cifs_dbg(VFS, "%s: Invalid snapshot time\n", | |
1645 | __func__); | |
1646 | goto cifs_parse_mount_err; | |
1647 | } | |
1648 | vol->snapshot_time = option; | |
1649 | break; | |
141891f4 SF |
1650 | case Opt_max_credits: |
1651 | if (get_option_ul(args, &option) || (option < 20) || | |
1652 | (option > 60000)) { | |
1653 | cifs_dbg(VFS, "%s: Invalid max_credits value\n", | |
1654 | __func__); | |
1655 | goto cifs_parse_mount_err; | |
1656 | } | |
1657 | vol->max_credits = option; | |
1658 | break; | |
8830d7e0 SP |
1659 | |
1660 | /* String Arguments */ | |
1661 | ||
4fe9e963 SP |
1662 | case Opt_blank_user: |
1663 | /* null user, ie. anonymous authentication */ | |
1664 | vol->nullauth = 1; | |
1665 | vol->username = NULL; | |
1666 | break; | |
8830d7e0 SP |
1667 | case Opt_user: |
1668 | string = match_strdup(args); | |
1669 | if (string == NULL) | |
1670 | goto out_nomem; | |
1671 | ||
8c3a2b4c SL |
1672 | if (strnlen(string, CIFS_MAX_USERNAME_LEN) > |
1673 | CIFS_MAX_USERNAME_LEN) { | |
0b456f04 | 1674 | pr_warn("CIFS: username too long\n"); |
8830d7e0 SP |
1675 | goto cifs_parse_mount_err; |
1676 | } | |
2bd50fb3 TK |
1677 | |
1678 | kfree(vol->username); | |
8830d7e0 | 1679 | vol->username = kstrdup(string, GFP_KERNEL); |
f96637be | 1680 | if (!vol->username) |
8830d7e0 | 1681 | goto cifs_parse_mount_err; |
8830d7e0 SP |
1682 | break; |
1683 | case Opt_blank_pass: | |
8830d7e0 SP |
1684 | /* passwords have to be handled differently |
1685 | * to allow the character used for deliminator | |
1686 | * to be passed within them | |
1687 | */ | |
1688 | ||
c369c9a4 SP |
1689 | /* |
1690 | * Check if this is a case where the password | |
1691 | * starts with a delimiter | |
1692 | */ | |
1693 | tmp_end = strchr(data, '='); | |
1694 | tmp_end++; | |
1695 | if (!(tmp_end < end && tmp_end[1] == delim)) { | |
1696 | /* No it is not. Set the password to NULL */ | |
d6ccf499 | 1697 | kfree(vol->password); |
c369c9a4 SP |
1698 | vol->password = NULL; |
1699 | break; | |
1700 | } | |
1701 | /* Yes it is. Drop down to Opt_pass below.*/ | |
1702 | case Opt_pass: | |
8830d7e0 SP |
1703 | /* Obtain the value string */ |
1704 | value = strchr(data, '='); | |
10238074 | 1705 | value++; |
8830d7e0 SP |
1706 | |
1707 | /* Set tmp_end to end of the string */ | |
1708 | tmp_end = (char *) value + strlen(value); | |
1709 | ||
1710 | /* Check if following character is the deliminator | |
1711 | * If yes, we have encountered a double deliminator | |
1712 | * reset the NULL character to the deliminator | |
1713 | */ | |
e73f843a | 1714 | if (tmp_end < end && tmp_end[1] == delim) { |
8830d7e0 SP |
1715 | tmp_end[0] = delim; |
1716 | ||
e73f843a SJ |
1717 | /* Keep iterating until we get to a single |
1718 | * deliminator OR the end | |
1719 | */ | |
1720 | while ((tmp_end = strchr(tmp_end, delim)) | |
1721 | != NULL && (tmp_end[1] == delim)) { | |
1722 | tmp_end = (char *) &tmp_end[2]; | |
1723 | } | |
1724 | ||
1725 | /* Reset var options to point to next element */ | |
1726 | if (tmp_end) { | |
1727 | tmp_end[0] = '\0'; | |
1728 | options = (char *) &tmp_end[1]; | |
1729 | } else | |
1730 | /* Reached the end of the mount option | |
1731 | * string */ | |
1732 | options = end; | |
8830d7e0 SP |
1733 | } |
1734 | ||
d6ccf499 | 1735 | kfree(vol->password); |
8830d7e0 SP |
1736 | /* Now build new password string */ |
1737 | temp_len = strlen(value); | |
1738 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); | |
1739 | if (vol->password == NULL) { | |
0b456f04 | 1740 | pr_warn("CIFS: no memory for password\n"); |
8830d7e0 SP |
1741 | goto cifs_parse_mount_err; |
1742 | } | |
1743 | ||
1744 | for (i = 0, j = 0; i < temp_len; i++, j++) { | |
1745 | vol->password[j] = value[i]; | |
1746 | if ((value[i] == delim) && | |
1747 | value[i+1] == delim) | |
1748 | /* skip the second deliminator */ | |
1749 | i++; | |
1750 | } | |
1751 | vol->password[j] = '\0'; | |
1752 | break; | |
4fe9e963 | 1753 | case Opt_blank_ip: |
b979aaa1 JL |
1754 | /* FIXME: should this be an error instead? */ |
1755 | got_ip = false; | |
4fe9e963 | 1756 | break; |
8830d7e0 SP |
1757 | case Opt_ip: |
1758 | string = match_strdup(args); | |
1759 | if (string == NULL) | |
1760 | goto out_nomem; | |
1761 | ||
b979aaa1 JL |
1762 | if (!cifs_convert_address(dstaddr, string, |
1763 | strlen(string))) { | |
0b456f04 | 1764 | pr_err("CIFS: bad ip= option (%s).\n", string); |
8830d7e0 SP |
1765 | goto cifs_parse_mount_err; |
1766 | } | |
b979aaa1 | 1767 | got_ip = true; |
8830d7e0 | 1768 | break; |
8830d7e0 SP |
1769 | case Opt_domain: |
1770 | string = match_strdup(args); | |
1771 | if (string == NULL) | |
1772 | goto out_nomem; | |
1773 | ||
057d6332 CG |
1774 | if (strnlen(string, CIFS_MAX_DOMAINNAME_LEN) |
1775 | == CIFS_MAX_DOMAINNAME_LEN) { | |
0b456f04 | 1776 | pr_warn("CIFS: domain name too long\n"); |
8830d7e0 SP |
1777 | goto cifs_parse_mount_err; |
1778 | } | |
1779 | ||
2bd50fb3 | 1780 | kfree(vol->domainname); |
8830d7e0 SP |
1781 | vol->domainname = kstrdup(string, GFP_KERNEL); |
1782 | if (!vol->domainname) { | |
0b456f04 | 1783 | pr_warn("CIFS: no memory for domainname\n"); |
8830d7e0 SP |
1784 | goto cifs_parse_mount_err; |
1785 | } | |
f96637be | 1786 | cifs_dbg(FYI, "Domain name set\n"); |
8830d7e0 SP |
1787 | break; |
1788 | case Opt_srcaddr: | |
1789 | string = match_strdup(args); | |
1790 | if (string == NULL) | |
1791 | goto out_nomem; | |
1792 | ||
4fe9e963 | 1793 | if (!cifs_convert_address( |
8830d7e0 SP |
1794 | (struct sockaddr *)&vol->srcaddr, |
1795 | string, strlen(string))) { | |
0b456f04 AS |
1796 | pr_warn("CIFS: Could not parse srcaddr: %s\n", |
1797 | string); | |
8830d7e0 SP |
1798 | goto cifs_parse_mount_err; |
1799 | } | |
1800 | break; | |
8830d7e0 SP |
1801 | case Opt_iocharset: |
1802 | string = match_strdup(args); | |
1803 | if (string == NULL) | |
1804 | goto out_nomem; | |
1805 | ||
4fe9e963 | 1806 | if (strnlen(string, 1024) >= 65) { |
0b456f04 | 1807 | pr_warn("CIFS: iocharset name too long.\n"); |
8830d7e0 SP |
1808 | goto cifs_parse_mount_err; |
1809 | } | |
1810 | ||
87e747cd | 1811 | if (strncasecmp(string, "default", 7) != 0) { |
2bd50fb3 | 1812 | kfree(vol->iocharset); |
8830d7e0 SP |
1813 | vol->iocharset = kstrdup(string, |
1814 | GFP_KERNEL); | |
1815 | if (!vol->iocharset) { | |
0b456f04 | 1816 | pr_warn("CIFS: no memory for charset\n"); |
8830d7e0 SP |
1817 | goto cifs_parse_mount_err; |
1818 | } | |
1819 | } | |
1820 | /* if iocharset not set then load_nls_default | |
1821 | * is used by caller | |
1822 | */ | |
f96637be | 1823 | cifs_dbg(FYI, "iocharset set to %s\n", string); |
8830d7e0 | 1824 | break; |
8830d7e0 SP |
1825 | case Opt_netbiosname: |
1826 | string = match_strdup(args); | |
1827 | if (string == NULL) | |
1828 | goto out_nomem; | |
1829 | ||
8830d7e0 SP |
1830 | memset(vol->source_rfc1001_name, 0x20, |
1831 | RFC1001_NAME_LEN); | |
1832 | /* | |
1833 | * FIXME: are there cases in which a comma can | |
1834 | * be valid in workstation netbios name (and | |
1835 | * need special handling)? | |
1836 | */ | |
1837 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
1838 | /* don't ucase netbiosname for user */ | |
1839 | if (string[i] == 0) | |
1840 | break; | |
1841 | vol->source_rfc1001_name[i] = string[i]; | |
1842 | } | |
1843 | /* The string has 16th byte zero still from | |
1844 | * set at top of the function | |
1845 | */ | |
1846 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
0b456f04 | 1847 | pr_warn("CIFS: netbiosname longer than 15 truncated.\n"); |
8830d7e0 SP |
1848 | break; |
1849 | case Opt_servern: | |
1850 | /* servernetbiosname specified override *SMBSERVER */ | |
1851 | string = match_strdup(args); | |
1852 | if (string == NULL) | |
1853 | goto out_nomem; | |
1854 | ||
8830d7e0 SP |
1855 | /* last byte, type, is 0x20 for servr type */ |
1856 | memset(vol->target_rfc1001_name, 0x20, | |
1857 | RFC1001_NAME_LEN_WITH_NULL); | |
1858 | ||
1859 | /* BB are there cases in which a comma can be | |
1860 | valid in this workstation netbios name | |
1861 | (and need special handling)? */ | |
1862 | ||
1863 | /* user or mount helper must uppercase the | |
1864 | netbios name */ | |
1865 | for (i = 0; i < 15; i++) { | |
1866 | if (string[i] == 0) | |
1867 | break; | |
1868 | vol->target_rfc1001_name[i] = string[i]; | |
1869 | } | |
1870 | /* The string has 16th byte zero still from | |
1871 | set at top of the function */ | |
1872 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
0b456f04 | 1873 | pr_warn("CIFS: server netbiosname longer than 15 truncated.\n"); |
8830d7e0 SP |
1874 | break; |
1875 | case Opt_ver: | |
1876 | string = match_strdup(args); | |
1877 | if (string == NULL) | |
1878 | goto out_nomem; | |
1879 | ||
87e747cd | 1880 | if (strncasecmp(string, "1", 1) == 0) { |
8830d7e0 SP |
1881 | /* This is the default */ |
1882 | break; | |
1883 | } | |
1884 | /* For all other value, error */ | |
0b456f04 | 1885 | pr_warn("CIFS: Invalid version specified\n"); |
b946845a | 1886 | goto cifs_parse_mount_err; |
23db65f5 JL |
1887 | case Opt_vers: |
1888 | string = match_strdup(args); | |
1889 | if (string == NULL) | |
1890 | goto out_nomem; | |
1891 | ||
1892 | if (cifs_parse_smb_version(string, vol) != 0) | |
1893 | goto cifs_parse_mount_err; | |
1894 | break; | |
8830d7e0 SP |
1895 | case Opt_sec: |
1896 | string = match_strdup(args); | |
1897 | if (string == NULL) | |
1898 | goto out_nomem; | |
1899 | ||
8830d7e0 SP |
1900 | if (cifs_parse_security_flavors(string, vol) != 0) |
1901 | goto cifs_parse_mount_err; | |
1902 | break; | |
15b6a473 JL |
1903 | case Opt_cache: |
1904 | string = match_strdup(args); | |
1905 | if (string == NULL) | |
1906 | goto out_nomem; | |
1907 | ||
1908 | if (cifs_parse_cache_flavor(string, vol) != 0) | |
1909 | goto cifs_parse_mount_err; | |
1910 | break; | |
8830d7e0 | 1911 | default: |
d8162558 JL |
1912 | /* |
1913 | * An option we don't recognize. Save it off for later | |
1914 | * if we haven't already found one | |
1915 | */ | |
1916 | if (!invalid) | |
1917 | invalid = data; | |
8830d7e0 | 1918 | break; |
1da177e4 | 1919 | } |
8830d7e0 SP |
1920 | /* Free up any allocated string */ |
1921 | kfree(string); | |
1922 | string = NULL; | |
1da177e4 | 1923 | } |
0eb8a132 | 1924 | |
d8162558 | 1925 | if (!sloppy && invalid) { |
0b456f04 | 1926 | pr_err("CIFS: Unknown mount option \"%s\"\n", invalid); |
d8162558 JL |
1927 | goto cifs_parse_mount_err; |
1928 | } | |
1929 | ||
8a8798a5 JL |
1930 | #ifndef CONFIG_KEYS |
1931 | /* Muliuser mounts require CONFIG_KEYS support */ | |
1932 | if (vol->multiuser) { | |
f96637be | 1933 | cifs_dbg(VFS, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n"); |
b946845a | 1934 | goto cifs_parse_mount_err; |
0eb8a132 | 1935 | } |
8a8798a5 | 1936 | #endif |
e5e69abd | 1937 | if (!vol->UNC) { |
37d4f99b | 1938 | cifs_dbg(VFS, "CIFS mount error: No usable UNC path provided in device string!\n"); |
e5e69abd JL |
1939 | goto cifs_parse_mount_err; |
1940 | } | |
0eb8a132 | 1941 | |
62a1a439 JL |
1942 | /* make sure UNC has a share name */ |
1943 | if (!strchr(vol->UNC + 3, '\\')) { | |
f96637be | 1944 | cifs_dbg(VFS, "Malformed UNC. Unable to find share name.\n"); |
62a1a439 JL |
1945 | goto cifs_parse_mount_err; |
1946 | } | |
1947 | ||
b979aaa1 | 1948 | if (!got_ip) { |
29bb3158 DP |
1949 | int len; |
1950 | const char *slash; | |
1951 | ||
b979aaa1 | 1952 | /* No ip= option specified? Try to get it from UNC */ |
29bb3158 DP |
1953 | /* Use the address part of the UNC. */ |
1954 | slash = strchr(&vol->UNC[2], '\\'); | |
1955 | len = slash - &vol->UNC[2]; | |
1956 | if (!cifs_convert_address(dstaddr, &vol->UNC[2], len)) { | |
0b456f04 | 1957 | pr_err("Unable to determine destination address.\n"); |
b979aaa1 JL |
1958 | goto cifs_parse_mount_err; |
1959 | } | |
1960 | } | |
1961 | ||
1962 | /* set the port that we got earlier */ | |
1963 | cifs_set_port(dstaddr, port); | |
1da177e4 | 1964 | |
9b9d6b24 JL |
1965 | if (uid_specified) |
1966 | vol->override_uid = override_uid; | |
1967 | else if (override_uid == 1) | |
0b456f04 | 1968 | pr_notice("CIFS: ignoring forceuid mount option specified with no uid= option.\n"); |
9b9d6b24 JL |
1969 | |
1970 | if (gid_specified) | |
1971 | vol->override_gid = override_gid; | |
1972 | else if (override_gid == 1) | |
0b456f04 | 1973 | pr_notice("CIFS: ignoring forcegid mount option specified with no gid= option.\n"); |
9b9d6b24 | 1974 | |
b946845a | 1975 | kfree(mountdata_copy); |
1da177e4 | 1976 | return 0; |
b946845a | 1977 | |
8830d7e0 | 1978 | out_nomem: |
0b456f04 | 1979 | pr_warn("Could not allocate temporary buffer\n"); |
b946845a | 1980 | cifs_parse_mount_err: |
8830d7e0 | 1981 | kfree(string); |
b946845a SF |
1982 | kfree(mountdata_copy); |
1983 | return 1; | |
1da177e4 LT |
1984 | } |
1985 | ||
3eb9a889 BG |
1986 | /** Returns true if srcaddr isn't specified and rhs isn't |
1987 | * specified, or if srcaddr is specified and | |
1988 | * matches the IP address of the rhs argument. | |
1989 | */ | |
1990 | static bool | |
1991 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
1992 | { | |
1993 | switch (srcaddr->sa_family) { | |
1994 | case AF_UNSPEC: | |
1995 | return (rhs->sa_family == AF_UNSPEC); | |
1996 | case AF_INET: { | |
1997 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
1998 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
1999 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
2000 | } | |
2001 | case AF_INET6: { | |
2002 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
e3e2775c | 2003 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs; |
3eb9a889 BG |
2004 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); |
2005 | } | |
2006 | default: | |
2007 | WARN_ON(1); | |
2008 | return false; /* don't expect to be here */ | |
2009 | } | |
2010 | } | |
2011 | ||
4b886136 PS |
2012 | /* |
2013 | * If no port is specified in addr structure, we try to match with 445 port | |
2014 | * and if it fails - with 139 ports. It should be called only if address | |
2015 | * families of server and addr are equal. | |
2016 | */ | |
2017 | static bool | |
2018 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
2019 | { | |
6da97910 | 2020 | __be16 port, *sport; |
4b886136 PS |
2021 | |
2022 | switch (addr->sa_family) { | |
2023 | case AF_INET: | |
2024 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
2025 | port = ((struct sockaddr_in *) addr)->sin_port; | |
2026 | break; | |
2027 | case AF_INET6: | |
2028 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
2029 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
2030 | break; | |
2031 | default: | |
2032 | WARN_ON(1); | |
2033 | return false; | |
2034 | } | |
2035 | ||
2036 | if (!port) { | |
2037 | port = htons(CIFS_PORT); | |
2038 | if (port == *sport) | |
2039 | return true; | |
2040 | ||
2041 | port = htons(RFC1001_PORT); | |
2042 | } | |
2043 | ||
2044 | return port == *sport; | |
2045 | } | |
3eb9a889 | 2046 | |
4515148e | 2047 | static bool |
3eb9a889 BG |
2048 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
2049 | struct sockaddr *srcaddr) | |
4515148e | 2050 | { |
4515148e | 2051 | switch (addr->sa_family) { |
a9f1b85e PS |
2052 | case AF_INET: { |
2053 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
2054 | struct sockaddr_in *srv_addr4 = | |
2055 | (struct sockaddr_in *)&server->dstaddr; | |
2056 | ||
2057 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 2058 | return false; |
4515148e | 2059 | break; |
a9f1b85e PS |
2060 | } |
2061 | case AF_INET6: { | |
2062 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
2063 | struct sockaddr_in6 *srv_addr6 = | |
2064 | (struct sockaddr_in6 *)&server->dstaddr; | |
2065 | ||
4515148e | 2066 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 2067 | &srv_addr6->sin6_addr)) |
4515148e | 2068 | return false; |
a9f1b85e | 2069 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 2070 | return false; |
4515148e JL |
2071 | break; |
2072 | } | |
a9f1b85e PS |
2073 | default: |
2074 | WARN_ON(1); | |
2075 | return false; /* don't expect to be here */ | |
2076 | } | |
4515148e | 2077 | |
3eb9a889 BG |
2078 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
2079 | return false; | |
2080 | ||
4515148e JL |
2081 | return true; |
2082 | } | |
2083 | ||
daf5b0b6 JL |
2084 | static bool |
2085 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
2086 | { | |
3f618223 JL |
2087 | /* |
2088 | * The select_sectype function should either return the vol->sectype | |
2089 | * that was specified, or "Unspecified" if that sectype was not | |
2090 | * compatible with the given NEGOTIATE request. | |
2091 | */ | |
ef65aaed SP |
2092 | if (server->ops->select_sectype(server, vol->sectype) |
2093 | == Unspecified) | |
daf5b0b6 | 2094 | return false; |
daf5b0b6 | 2095 | |
3f618223 JL |
2096 | /* |
2097 | * Now check if signing mode is acceptable. No need to check | |
2098 | * global_secflags at this point since if MUST_SIGN is set then | |
2099 | * the server->sign had better be too. | |
2100 | */ | |
38d77c50 JL |
2101 | if (vol->sign && !server->sign) |
2102 | return false; | |
daf5b0b6 JL |
2103 | |
2104 | return true; | |
2105 | } | |
2106 | ||
9fa114f7 | 2107 | static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol) |
37bb04e5 | 2108 | { |
9fa114f7 JL |
2109 | struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr; |
2110 | ||
a0b3df5c JL |
2111 | if (vol->nosharesock) |
2112 | return 0; | |
2113 | ||
23db65f5 JL |
2114 | if ((server->vals != vol->vals) || (server->ops != vol->ops)) |
2115 | return 0; | |
2116 | ||
37bb04e5 PS |
2117 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) |
2118 | return 0; | |
2119 | ||
2120 | if (!match_address(server, addr, | |
2121 | (struct sockaddr *)&vol->srcaddr)) | |
2122 | return 0; | |
2123 | ||
2124 | if (!match_port(server, addr)) | |
2125 | return 0; | |
2126 | ||
2127 | if (!match_security(server, vol)) | |
2128 | return 0; | |
2129 | ||
b782fcc1 | 2130 | if (server->echo_interval != vol->echo_interval * HZ) |
adfeb3e0 SF |
2131 | return 0; |
2132 | ||
37bb04e5 PS |
2133 | return 1; |
2134 | } | |
2135 | ||
e7ddee90 | 2136 | static struct TCP_Server_Info * |
9fa114f7 | 2137 | cifs_find_tcp_session(struct smb_vol *vol) |
1da177e4 | 2138 | { |
e7ddee90 | 2139 | struct TCP_Server_Info *server; |
e7ddee90 | 2140 | |
3f9bcca7 | 2141 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 2142 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
9fa114f7 | 2143 | if (!match_server(server, vol)) |
daf5b0b6 JL |
2144 | continue; |
2145 | ||
e7ddee90 | 2146 | ++server->srv_count; |
3f9bcca7 | 2147 | spin_unlock(&cifs_tcp_ses_lock); |
f96637be | 2148 | cifs_dbg(FYI, "Existing tcp session with server found\n"); |
e7ddee90 | 2149 | return server; |
1da177e4 | 2150 | } |
3f9bcca7 | 2151 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2152 | return NULL; |
2153 | } | |
1b20d672 | 2154 | |
53e0e11e PS |
2155 | void |
2156 | cifs_put_tcp_session(struct TCP_Server_Info *server, int from_reconnect) | |
1da177e4 | 2157 | { |
a5c3e1c7 SF |
2158 | struct task_struct *task; |
2159 | ||
3f9bcca7 | 2160 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 2161 | if (--server->srv_count > 0) { |
3f9bcca7 | 2162 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 2163 | return; |
1da177e4 | 2164 | } |
1b20d672 | 2165 | |
f1d0c998 RL |
2166 | put_net(cifs_net_ns(server)); |
2167 | ||
e7ddee90 | 2168 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 2169 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2170 | |
c74093b6 JL |
2171 | cancel_delayed_work_sync(&server->echo); |
2172 | ||
53e0e11e PS |
2173 | #ifdef CONFIG_CIFS_SMB2 |
2174 | if (from_reconnect) | |
2175 | /* | |
2176 | * Avoid deadlock here: reconnect work calls | |
2177 | * cifs_put_tcp_session() at its end. Need to be sure | |
2178 | * that reconnect work does nothing with server pointer after | |
2179 | * that step. | |
2180 | */ | |
2181 | cancel_delayed_work(&server->reconnect); | |
2182 | else | |
2183 | cancel_delayed_work_sync(&server->reconnect); | |
2184 | #endif | |
2185 | ||
e7ddee90 JL |
2186 | spin_lock(&GlobalMid_Lock); |
2187 | server->tcpStatus = CifsExiting; | |
2188 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 2189 | |
026e93dc | 2190 | cifs_crypto_secmech_release(server); |
488f1d2d SJ |
2191 | cifs_fscache_release_client_cookie(server); |
2192 | ||
21e73393 SP |
2193 | kfree(server->session_key.response); |
2194 | server->session_key.response = NULL; | |
2195 | server->session_key.len = 0; | |
a5c3e1c7 SF |
2196 | |
2197 | task = xchg(&server->tsk, NULL); | |
2198 | if (task) | |
2199 | force_sig(SIGKILL, task); | |
1da177e4 LT |
2200 | } |
2201 | ||
63c038c2 JL |
2202 | static struct TCP_Server_Info * |
2203 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
2204 | { | |
2205 | struct TCP_Server_Info *tcp_ses = NULL; | |
63c038c2 JL |
2206 | int rc; |
2207 | ||
f96637be | 2208 | cifs_dbg(FYI, "UNC: %s\n", volume_info->UNC); |
63c038c2 JL |
2209 | |
2210 | /* see if we already have a matching tcp_ses */ | |
9fa114f7 | 2211 | tcp_ses = cifs_find_tcp_session(volume_info); |
63c038c2 JL |
2212 | if (tcp_ses) |
2213 | return tcp_ses; | |
2214 | ||
2215 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
2216 | if (!tcp_ses) { | |
2217 | rc = -ENOMEM; | |
2218 | goto out_err; | |
2219 | } | |
2220 | ||
23db65f5 JL |
2221 | tcp_ses->ops = volume_info->ops; |
2222 | tcp_ses->vals = volume_info->vals; | |
f1d0c998 | 2223 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
2224 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
2225 | if (IS_ERR(tcp_ses->hostname)) { | |
2226 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 2227 | goto out_err_crypto_release; |
63c038c2 JL |
2228 | } |
2229 | ||
2230 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
2231 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 2232 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
fc40f9cf | 2233 | tcp_ses->in_flight = 0; |
2d86dbc9 | 2234 | tcp_ses->credits = 1; |
63c038c2 JL |
2235 | init_waitqueue_head(&tcp_ses->response_q); |
2236 | init_waitqueue_head(&tcp_ses->request_q); | |
2237 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
2238 | mutex_init(&tcp_ses->srv_mutex); | |
2239 | memcpy(tcp_ses->workstation_RFC1001_name, | |
2240 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
2241 | memcpy(tcp_ses->server_RFC1001_name, | |
2242 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 2243 | tcp_ses->session_estab = false; |
63c038c2 | 2244 | tcp_ses->sequence_number = 0; |
fda35943 | 2245 | tcp_ses->lstrp = jiffies; |
58fa015f | 2246 | spin_lock_init(&tcp_ses->req_lock); |
63c038c2 JL |
2247 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
2248 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 2249 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
53e0e11e PS |
2250 | #ifdef CONFIG_CIFS_SMB2 |
2251 | INIT_DELAYED_WORK(&tcp_ses->reconnect, smb2_reconnect_server); | |
2252 | mutex_init(&tcp_ses->reconnect_mutex); | |
2253 | #endif | |
9fa114f7 JL |
2254 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
2255 | sizeof(tcp_ses->srcaddr)); | |
2256 | memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr, | |
2257 | sizeof(tcp_ses->dstaddr)); | |
39552ea8 | 2258 | #ifdef CONFIG_CIFS_SMB2 |
fa70b87c | 2259 | generate_random_uuid(tcp_ses->client_guid); |
39552ea8 | 2260 | #endif |
63c038c2 JL |
2261 | /* |
2262 | * at this point we are the only ones with the pointer | |
2263 | * to the struct since the kernel thread not created yet | |
2264 | * no need to spinlock this init of tcpStatus or srv_count | |
2265 | */ | |
2266 | tcp_ses->tcpStatus = CifsNew; | |
2267 | ++tcp_ses->srv_count; | |
2268 | ||
adfeb3e0 SF |
2269 | if (volume_info->echo_interval >= SMB_ECHO_INTERVAL_MIN && |
2270 | volume_info->echo_interval <= SMB_ECHO_INTERVAL_MAX) | |
2271 | tcp_ses->echo_interval = volume_info->echo_interval * HZ; | |
2272 | else | |
2273 | tcp_ses->echo_interval = SMB_ECHO_INTERVAL_DEFAULT * HZ; | |
2274 | ||
a9f1b85e | 2275 | rc = ip_connect(tcp_ses); |
63c038c2 | 2276 | if (rc < 0) { |
f96637be | 2277 | cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n"); |
f7c5445a | 2278 | goto out_err_crypto_release; |
63c038c2 JL |
2279 | } |
2280 | ||
2281 | /* | |
2282 | * since we're in a cifs function already, we know that | |
2283 | * this will succeed. No need for try_module_get(). | |
2284 | */ | |
2285 | __module_get(THIS_MODULE); | |
7c97c200 | 2286 | tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, |
63c038c2 JL |
2287 | tcp_ses, "cifsd"); |
2288 | if (IS_ERR(tcp_ses->tsk)) { | |
2289 | rc = PTR_ERR(tcp_ses->tsk); | |
f96637be | 2290 | cifs_dbg(VFS, "error %d create cifsd thread\n", rc); |
63c038c2 | 2291 | module_put(THIS_MODULE); |
f7c5445a | 2292 | goto out_err_crypto_release; |
63c038c2 | 2293 | } |
fd88ce93 | 2294 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
63c038c2 JL |
2295 | |
2296 | /* thread spawned, put it on the list */ | |
3f9bcca7 | 2297 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 2298 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 2299 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 2300 | |
488f1d2d SJ |
2301 | cifs_fscache_get_client_cookie(tcp_ses); |
2302 | ||
c74093b6 | 2303 | /* queue echo request delayed work */ |
adfeb3e0 | 2304 | queue_delayed_work(cifsiod_wq, &tcp_ses->echo, tcp_ses->echo_interval); |
c74093b6 | 2305 | |
63c038c2 JL |
2306 | return tcp_ses; |
2307 | ||
f7c5445a | 2308 | out_err_crypto_release: |
026e93dc | 2309 | cifs_crypto_secmech_release(tcp_ses); |
d2b91521 | 2310 | |
f1d0c998 RL |
2311 | put_net(cifs_net_ns(tcp_ses)); |
2312 | ||
63c038c2 JL |
2313 | out_err: |
2314 | if (tcp_ses) { | |
8347a5cd SF |
2315 | if (!IS_ERR(tcp_ses->hostname)) |
2316 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
2317 | if (tcp_ses->ssocket) |
2318 | sock_release(tcp_ses->ssocket); | |
2319 | kfree(tcp_ses); | |
2320 | } | |
2321 | return ERR_PTR(rc); | |
2322 | } | |
2323 | ||
96daf2b0 | 2324 | static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
37bb04e5 | 2325 | { |
3f618223 JL |
2326 | if (vol->sectype != Unspecified && |
2327 | vol->sectype != ses->sectype) | |
2328 | return 0; | |
2329 | ||
2330 | switch (ses->sectype) { | |
37bb04e5 | 2331 | case Kerberos: |
64ed39dd | 2332 | if (!uid_eq(vol->cred_uid, ses->cred_uid)) |
37bb04e5 PS |
2333 | return 0; |
2334 | break; | |
2335 | default: | |
04febabc JL |
2336 | /* NULL username means anonymous session */ |
2337 | if (ses->user_name == NULL) { | |
2338 | if (!vol->nullauth) | |
2339 | return 0; | |
2340 | break; | |
2341 | } | |
2342 | ||
37bb04e5 | 2343 | /* anything else takes username/password */ |
04febabc JL |
2344 | if (strncmp(ses->user_name, |
2345 | vol->username ? vol->username : "", | |
8c3a2b4c | 2346 | CIFS_MAX_USERNAME_LEN)) |
37bb04e5 | 2347 | return 0; |
08b37d51 | 2348 | if ((vol->username && strlen(vol->username) != 0) && |
37bb04e5 PS |
2349 | ses->password != NULL && |
2350 | strncmp(ses->password, | |
2351 | vol->password ? vol->password : "", | |
8c3a2b4c | 2352 | CIFS_MAX_PASSWORD_LEN)) |
37bb04e5 PS |
2353 | return 0; |
2354 | } | |
2355 | return 1; | |
2356 | } | |
2357 | ||
96daf2b0 | 2358 | static struct cifs_ses * |
4ff67b72 | 2359 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 2360 | { |
96daf2b0 | 2361 | struct cifs_ses *ses; |
dea570e0 | 2362 | |
3f9bcca7 | 2363 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 | 2364 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
7f48558e SP |
2365 | if (ses->status == CifsExiting) |
2366 | continue; | |
37bb04e5 PS |
2367 | if (!match_session(ses, vol)) |
2368 | continue; | |
14fbf50d | 2369 | ++ses->ses_count; |
3f9bcca7 | 2370 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2371 | return ses; |
2372 | } | |
3f9bcca7 | 2373 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2374 | return NULL; |
2375 | } | |
dea570e0 | 2376 | |
14fbf50d | 2377 | static void |
96daf2b0 | 2378 | cifs_put_smb_ses(struct cifs_ses *ses) |
14fbf50d | 2379 | { |
7f48558e | 2380 | unsigned int rc, xid; |
14fbf50d | 2381 | struct TCP_Server_Info *server = ses->server; |
dea570e0 | 2382 | |
f96637be | 2383 | cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count); |
7f48558e | 2384 | |
3f9bcca7 | 2385 | spin_lock(&cifs_tcp_ses_lock); |
7f48558e SP |
2386 | if (ses->status == CifsExiting) { |
2387 | spin_unlock(&cifs_tcp_ses_lock); | |
2388 | return; | |
2389 | } | |
14fbf50d | 2390 | if (--ses->ses_count > 0) { |
3f9bcca7 | 2391 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2392 | return; |
2393 | } | |
7f48558e SP |
2394 | if (ses->status == CifsGood) |
2395 | ses->status = CifsExiting; | |
3f9bcca7 | 2396 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2397 | |
7f48558e | 2398 | if (ses->status == CifsExiting && server->ops->logoff) { |
6d5786a3 | 2399 | xid = get_xid(); |
7f48558e SP |
2400 | rc = server->ops->logoff(xid, ses); |
2401 | if (rc) | |
2402 | cifs_dbg(VFS, "%s: Session Logoff failure rc=%d\n", | |
2403 | __func__, rc); | |
6d5786a3 | 2404 | _free_xid(xid); |
14fbf50d | 2405 | } |
7f48558e SP |
2406 | |
2407 | spin_lock(&cifs_tcp_ses_lock); | |
2408 | list_del_init(&ses->smb_ses_list); | |
2409 | spin_unlock(&cifs_tcp_ses_lock); | |
2410 | ||
14fbf50d | 2411 | sesInfoFree(ses); |
53e0e11e | 2412 | cifs_put_tcp_session(server, 0); |
14fbf50d | 2413 | } |
dea570e0 | 2414 | |
8a8798a5 JL |
2415 | #ifdef CONFIG_KEYS |
2416 | ||
057d6332 CG |
2417 | /* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */ |
2418 | #define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1) | |
8a8798a5 JL |
2419 | |
2420 | /* Populate username and pw fields from keyring if possible */ | |
2421 | static int | |
2422 | cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) | |
2423 | { | |
2424 | int rc = 0; | |
146aa8b1 DH |
2425 | const char *delim, *payload; |
2426 | char *desc; | |
8a8798a5 JL |
2427 | ssize_t len; |
2428 | struct key *key; | |
2429 | struct TCP_Server_Info *server = ses->server; | |
2430 | struct sockaddr_in *sa; | |
2431 | struct sockaddr_in6 *sa6; | |
146aa8b1 | 2432 | const struct user_key_payload *upayload; |
8a8798a5 JL |
2433 | |
2434 | desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL); | |
2435 | if (!desc) | |
2436 | return -ENOMEM; | |
2437 | ||
2438 | /* try to find an address key first */ | |
2439 | switch (server->dstaddr.ss_family) { | |
2440 | case AF_INET: | |
2441 | sa = (struct sockaddr_in *)&server->dstaddr; | |
2442 | sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr); | |
2443 | break; | |
2444 | case AF_INET6: | |
2445 | sa6 = (struct sockaddr_in6 *)&server->dstaddr; | |
2446 | sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr); | |
2447 | break; | |
2448 | default: | |
f96637be JP |
2449 | cifs_dbg(FYI, "Bad ss_family (%hu)\n", |
2450 | server->dstaddr.ss_family); | |
8a8798a5 JL |
2451 | rc = -EINVAL; |
2452 | goto out_err; | |
2453 | } | |
2454 | ||
f96637be | 2455 | cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
8a8798a5 JL |
2456 | key = request_key(&key_type_logon, desc, ""); |
2457 | if (IS_ERR(key)) { | |
2458 | if (!ses->domainName) { | |
f96637be | 2459 | cifs_dbg(FYI, "domainName is NULL\n"); |
8a8798a5 JL |
2460 | rc = PTR_ERR(key); |
2461 | goto out_err; | |
2462 | } | |
2463 | ||
2464 | /* didn't work, try to find a domain key */ | |
2465 | sprintf(desc, "cifs:d:%s", ses->domainName); | |
f96637be | 2466 | cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
8a8798a5 JL |
2467 | key = request_key(&key_type_logon, desc, ""); |
2468 | if (IS_ERR(key)) { | |
2469 | rc = PTR_ERR(key); | |
2470 | goto out_err; | |
2471 | } | |
2472 | } | |
2473 | ||
2474 | down_read(&key->sem); | |
0837e49a | 2475 | upayload = user_key_payload_locked(key); |
8a8798a5 | 2476 | if (IS_ERR_OR_NULL(upayload)) { |
4edc53c1 | 2477 | rc = upayload ? PTR_ERR(upayload) : -EINVAL; |
8a8798a5 JL |
2478 | goto out_key_put; |
2479 | } | |
2480 | ||
2481 | /* find first : in payload */ | |
146aa8b1 | 2482 | payload = upayload->data; |
8a8798a5 | 2483 | delim = strnchr(payload, upayload->datalen, ':'); |
f96637be | 2484 | cifs_dbg(FYI, "payload=%s\n", payload); |
8a8798a5 | 2485 | if (!delim) { |
f96637be JP |
2486 | cifs_dbg(FYI, "Unable to find ':' in payload (datalen=%d)\n", |
2487 | upayload->datalen); | |
8a8798a5 JL |
2488 | rc = -EINVAL; |
2489 | goto out_key_put; | |
2490 | } | |
2491 | ||
2492 | len = delim - payload; | |
8c3a2b4c | 2493 | if (len > CIFS_MAX_USERNAME_LEN || len <= 0) { |
f96637be JP |
2494 | cifs_dbg(FYI, "Bad value from username search (len=%zd)\n", |
2495 | len); | |
8a8798a5 JL |
2496 | rc = -EINVAL; |
2497 | goto out_key_put; | |
2498 | } | |
2499 | ||
2500 | vol->username = kstrndup(payload, len, GFP_KERNEL); | |
2501 | if (!vol->username) { | |
f96637be JP |
2502 | cifs_dbg(FYI, "Unable to allocate %zd bytes for username\n", |
2503 | len); | |
8a8798a5 JL |
2504 | rc = -ENOMEM; |
2505 | goto out_key_put; | |
2506 | } | |
f96637be | 2507 | cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username); |
8a8798a5 JL |
2508 | |
2509 | len = key->datalen - (len + 1); | |
8c3a2b4c | 2510 | if (len > CIFS_MAX_PASSWORD_LEN || len <= 0) { |
f96637be | 2511 | cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len); |
8a8798a5 JL |
2512 | rc = -EINVAL; |
2513 | kfree(vol->username); | |
2514 | vol->username = NULL; | |
2515 | goto out_key_put; | |
2516 | } | |
2517 | ||
2518 | ++delim; | |
2519 | vol->password = kstrndup(delim, len, GFP_KERNEL); | |
2520 | if (!vol->password) { | |
f96637be JP |
2521 | cifs_dbg(FYI, "Unable to allocate %zd bytes for password\n", |
2522 | len); | |
8a8798a5 JL |
2523 | rc = -ENOMEM; |
2524 | kfree(vol->username); | |
2525 | vol->username = NULL; | |
2526 | goto out_key_put; | |
2527 | } | |
2528 | ||
2529 | out_key_put: | |
2530 | up_read(&key->sem); | |
2531 | key_put(key); | |
2532 | out_err: | |
2533 | kfree(desc); | |
f96637be | 2534 | cifs_dbg(FYI, "%s: returning %d\n", __func__, rc); |
8a8798a5 JL |
2535 | return rc; |
2536 | } | |
2537 | #else /* ! CONFIG_KEYS */ | |
2538 | static inline int | |
2539 | cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), | |
2540 | struct cifs_ses *ses __attribute__((unused))) | |
2541 | { | |
2542 | return -ENOSYS; | |
2543 | } | |
2544 | #endif /* CONFIG_KEYS */ | |
2545 | ||
96daf2b0 | 2546 | static struct cifs_ses * |
36988c76 JL |
2547 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
2548 | { | |
286170aa PS |
2549 | int rc = -ENOMEM; |
2550 | unsigned int xid; | |
96daf2b0 | 2551 | struct cifs_ses *ses; |
a9f1b85e PS |
2552 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
2553 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 | 2554 | |
6d5786a3 | 2555 | xid = get_xid(); |
36988c76 | 2556 | |
4ff67b72 | 2557 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 | 2558 | if (ses) { |
f96637be JP |
2559 | cifs_dbg(FYI, "Existing smb sess found (status=%d)\n", |
2560 | ses->status); | |
36988c76 | 2561 | |
36988c76 | 2562 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
2563 | rc = cifs_negotiate_protocol(xid, ses); |
2564 | if (rc) { | |
2565 | mutex_unlock(&ses->session_mutex); | |
2566 | /* problem -- put our ses reference */ | |
2567 | cifs_put_smb_ses(ses); | |
6d5786a3 | 2568 | free_xid(xid); |
198b5682 JL |
2569 | return ERR_PTR(rc); |
2570 | } | |
36988c76 | 2571 | if (ses->need_reconnect) { |
f96637be | 2572 | cifs_dbg(FYI, "Session needs reconnect\n"); |
36988c76 JL |
2573 | rc = cifs_setup_session(xid, ses, |
2574 | volume_info->local_nls); | |
2575 | if (rc) { | |
2576 | mutex_unlock(&ses->session_mutex); | |
2577 | /* problem -- put our reference */ | |
2578 | cifs_put_smb_ses(ses); | |
6d5786a3 | 2579 | free_xid(xid); |
36988c76 JL |
2580 | return ERR_PTR(rc); |
2581 | } | |
2582 | } | |
2583 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
2584 | |
2585 | /* existing SMB ses has a server reference already */ | |
53e0e11e | 2586 | cifs_put_tcp_session(server, 0); |
6d5786a3 | 2587 | free_xid(xid); |
36988c76 JL |
2588 | return ses; |
2589 | } | |
2590 | ||
f96637be | 2591 | cifs_dbg(FYI, "Existing smb sess not found\n"); |
36988c76 JL |
2592 | ses = sesInfoAlloc(); |
2593 | if (ses == NULL) | |
2594 | goto get_ses_fail; | |
2595 | ||
2596 | /* new SMB session uses our server ref */ | |
2597 | ses->server = server; | |
a9f1b85e PS |
2598 | if (server->dstaddr.ss_family == AF_INET6) |
2599 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 2600 | else |
a9f1b85e | 2601 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 2602 | |
8727c8a8 SF |
2603 | if (volume_info->username) { |
2604 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
2605 | if (!ses->user_name) | |
2606 | goto get_ses_fail; | |
2607 | } | |
36988c76 JL |
2608 | |
2609 | /* volume_info->password freed at unmount */ | |
2610 | if (volume_info->password) { | |
2611 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2612 | if (!ses->password) | |
2613 | goto get_ses_fail; | |
2614 | } | |
2615 | if (volume_info->domainname) { | |
d3686d54 SP |
2616 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
2617 | if (!ses->domainName) | |
2618 | goto get_ses_fail; | |
36988c76 | 2619 | } |
39566443 GP |
2620 | if (volume_info->domainauto) |
2621 | ses->domainAuto = volume_info->domainauto; | |
3e4b3e1f | 2622 | ses->cred_uid = volume_info->cred_uid; |
36988c76 | 2623 | ses->linux_uid = volume_info->linux_uid; |
d9b94201 | 2624 | |
28e11bd8 JL |
2625 | ses->sectype = volume_info->sectype; |
2626 | ses->sign = volume_info->sign; | |
36988c76 JL |
2627 | |
2628 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
2629 | rc = cifs_negotiate_protocol(xid, ses); |
2630 | if (!rc) | |
2631 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 2632 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 2633 | if (rc) |
36988c76 JL |
2634 | goto get_ses_fail; |
2635 | ||
2636 | /* success, put it on the list */ | |
3f9bcca7 | 2637 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 2638 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 2639 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 | 2640 | |
6d5786a3 | 2641 | free_xid(xid); |
36988c76 JL |
2642 | return ses; |
2643 | ||
2644 | get_ses_fail: | |
2645 | sesInfoFree(ses); | |
6d5786a3 | 2646 | free_xid(xid); |
36988c76 JL |
2647 | return ERR_PTR(rc); |
2648 | } | |
2649 | ||
ae6f8dd4 | 2650 | static int match_tcon(struct cifs_tcon *tcon, struct smb_vol *volume_info) |
37bb04e5 PS |
2651 | { |
2652 | if (tcon->tidStatus == CifsExiting) | |
2653 | return 0; | |
ae6f8dd4 | 2654 | if (strncmp(tcon->treeName, volume_info->UNC, MAX_TREE_SIZE)) |
37bb04e5 | 2655 | return 0; |
ae6f8dd4 PS |
2656 | if (tcon->seal != volume_info->seal) |
2657 | return 0; | |
2658 | #ifdef CONFIG_CIFS_SMB2 | |
2659 | if (tcon->snapshot_time != volume_info->snapshot_time) | |
2660 | return 0; | |
2661 | #endif /* CONFIG_CIFS_SMB2 */ | |
37bb04e5 PS |
2662 | return 1; |
2663 | } | |
2664 | ||
96daf2b0 | 2665 | static struct cifs_tcon * |
8b217fe7 | 2666 | cifs_find_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) |
f1987b44 JL |
2667 | { |
2668 | struct list_head *tmp; | |
96daf2b0 | 2669 | struct cifs_tcon *tcon; |
f1987b44 | 2670 | |
3f9bcca7 | 2671 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2672 | list_for_each(tmp, &ses->tcon_list) { |
96daf2b0 | 2673 | tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
ae6f8dd4 | 2674 | if (!match_tcon(tcon, volume_info)) |
f1987b44 | 2675 | continue; |
f1987b44 | 2676 | ++tcon->tc_count; |
3f9bcca7 | 2677 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2678 | return tcon; |
1da177e4 | 2679 | } |
3f9bcca7 | 2680 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2681 | return NULL; |
2682 | } | |
2683 | ||
53e0e11e | 2684 | void |
96daf2b0 | 2685 | cifs_put_tcon(struct cifs_tcon *tcon) |
f1987b44 | 2686 | { |
2e6e02ab | 2687 | unsigned int xid; |
96daf2b0 | 2688 | struct cifs_ses *ses = tcon->ses; |
f1987b44 | 2689 | |
f96637be | 2690 | cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
3f9bcca7 | 2691 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2692 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 2693 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2694 | return; |
2695 | } | |
2696 | ||
2697 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 2698 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 | 2699 | |
6d5786a3 | 2700 | xid = get_xid(); |
2e6e02ab PS |
2701 | if (ses->server->ops->tree_disconnect) |
2702 | ses->server->ops->tree_disconnect(xid, tcon); | |
6d5786a3 | 2703 | _free_xid(xid); |
f1987b44 | 2704 | |
d03382ce | 2705 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 2706 | tconInfoFree(tcon); |
f1987b44 JL |
2707 | cifs_put_smb_ses(ses); |
2708 | } | |
2709 | ||
96daf2b0 SF |
2710 | static struct cifs_tcon * |
2711 | cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) | |
d00c28de JL |
2712 | { |
2713 | int rc, xid; | |
96daf2b0 | 2714 | struct cifs_tcon *tcon; |
d00c28de | 2715 | |
8b217fe7 | 2716 | tcon = cifs_find_tcon(ses, volume_info); |
d00c28de | 2717 | if (tcon) { |
f96637be | 2718 | cifs_dbg(FYI, "Found match on UNC path\n"); |
d00c28de JL |
2719 | /* existing tcon already has a reference */ |
2720 | cifs_put_smb_ses(ses); | |
d00c28de JL |
2721 | return tcon; |
2722 | } | |
2723 | ||
2e6e02ab PS |
2724 | if (!ses->server->ops->tree_connect) { |
2725 | rc = -ENOSYS; | |
2726 | goto out_fail; | |
2727 | } | |
2728 | ||
d00c28de JL |
2729 | tcon = tconInfoAlloc(); |
2730 | if (tcon == NULL) { | |
2731 | rc = -ENOMEM; | |
2732 | goto out_fail; | |
2733 | } | |
2734 | ||
8b217fe7 SF |
2735 | if (volume_info->snapshot_time) { |
2736 | #ifdef CONFIG_CIFS_SMB2 | |
2737 | if (ses->server->vals->protocol_id == 0) { | |
2738 | cifs_dbg(VFS, | |
2739 | "Use SMB2 or later for snapshot mount option\n"); | |
2740 | rc = -EOPNOTSUPP; | |
2741 | goto out_fail; | |
2742 | } else | |
2743 | tcon->snapshot_time = volume_info->snapshot_time; | |
2744 | #else | |
2745 | cifs_dbg(VFS, "Snapshot mount option requires SMB2 support\n"); | |
2746 | rc = -EOPNOTSUPP; | |
2747 | goto out_fail; | |
2748 | #endif /* CONFIG_CIFS_SMB2 */ | |
2749 | } | |
2750 | ||
d00c28de JL |
2751 | tcon->ses = ses; |
2752 | if (volume_info->password) { | |
2753 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2754 | if (!tcon->password) { | |
2755 | rc = -ENOMEM; | |
2756 | goto out_fail; | |
2757 | } | |
2758 | } | |
2759 | ||
2e6e02ab PS |
2760 | /* |
2761 | * BB Do we need to wrap session_mutex around this TCon call and Unix | |
2762 | * SetFS as we do on SessSetup and reconnect? | |
2763 | */ | |
6d5786a3 | 2764 | xid = get_xid(); |
2e6e02ab PS |
2765 | rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon, |
2766 | volume_info->local_nls); | |
6d5786a3 | 2767 | free_xid(xid); |
f96637be | 2768 | cifs_dbg(FYI, "Tcon rc = %d\n", rc); |
d00c28de JL |
2769 | if (rc) |
2770 | goto out_fail; | |
2771 | ||
2772 | if (volume_info->nodfs) { | |
2773 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
f96637be | 2774 | cifs_dbg(FYI, "DFS disabled (%d)\n", tcon->Flags); |
d00c28de | 2775 | } |
b618f001 SF |
2776 | tcon->use_persistent = false; |
2777 | /* check if SMB2 or later, CIFS does not support persistent handles */ | |
2778 | if (volume_info->persistent) { | |
2779 | if (ses->server->vals->protocol_id == 0) { | |
2780 | cifs_dbg(VFS, | |
2781 | "SMB3 or later required for persistent handles\n"); | |
2782 | rc = -EOPNOTSUPP; | |
2783 | goto out_fail; | |
592fafe6 | 2784 | #ifdef CONFIG_CIFS_SMB2 |
b618f001 SF |
2785 | } else if (ses->server->capabilities & |
2786 | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) | |
2787 | tcon->use_persistent = true; | |
2788 | else /* persistent handles requested but not supported */ { | |
2789 | cifs_dbg(VFS, | |
2790 | "Persistent handles not supported on share\n"); | |
2791 | rc = -EOPNOTSUPP; | |
2792 | goto out_fail; | |
592fafe6 | 2793 | #endif /* CONFIG_CIFS_SMB2 */ |
b618f001 | 2794 | } |
592fafe6 | 2795 | #ifdef CONFIG_CIFS_SMB2 |
b618f001 SF |
2796 | } else if ((tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) |
2797 | && (ses->server->capabilities & SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) | |
2798 | && (volume_info->nopersistent == false)) { | |
2799 | cifs_dbg(FYI, "enabling persistent handles\n"); | |
2800 | tcon->use_persistent = true; | |
592fafe6 SF |
2801 | #endif /* CONFIG_CIFS_SMB2 */ |
2802 | } else if (volume_info->resilient) { | |
2803 | if (ses->server->vals->protocol_id == 0) { | |
2804 | cifs_dbg(VFS, | |
2805 | "SMB2.1 or later required for resilient handles\n"); | |
2806 | rc = -EOPNOTSUPP; | |
2807 | goto out_fail; | |
2808 | } | |
2809 | tcon->use_resilient = true; | |
b618f001 SF |
2810 | } |
2811 | ||
ae6f8dd4 PS |
2812 | if (volume_info->seal) { |
2813 | if (ses->server->vals->protocol_id == 0) { | |
2814 | cifs_dbg(VFS, | |
2815 | "SMB3 or later required for encryption\n"); | |
2816 | rc = -EOPNOTSUPP; | |
2817 | goto out_fail; | |
2818 | #ifdef CONFIG_CIFS_SMB2 | |
2819 | } else if (tcon->ses->server->capabilities & | |
2820 | SMB2_GLOBAL_CAP_ENCRYPTION) | |
2821 | tcon->seal = true; | |
2822 | else { | |
2823 | cifs_dbg(VFS, "Encryption is not supported on share\n"); | |
2824 | rc = -EOPNOTSUPP; | |
2825 | goto out_fail; | |
2826 | #endif /* CONFIG_CIFS_SMB2 */ | |
2827 | } | |
2828 | } | |
2829 | ||
2e6e02ab PS |
2830 | /* |
2831 | * We can have only one retry value for a connection to a share so for | |
2832 | * resources mounted more than once to the same server share the last | |
2833 | * value passed in for the retry flag is used. | |
2834 | */ | |
d00c28de JL |
2835 | tcon->retry = volume_info->retry; |
2836 | tcon->nocase = volume_info->nocase; | |
2837 | tcon->local_lease = volume_info->local_lease; | |
233839b1 | 2838 | INIT_LIST_HEAD(&tcon->pending_opens); |
d00c28de | 2839 | |
3f9bcca7 | 2840 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 2841 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 2842 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 2843 | |
d03382ce SJ |
2844 | cifs_fscache_get_super_cookie(tcon); |
2845 | ||
d00c28de JL |
2846 | return tcon; |
2847 | ||
2848 | out_fail: | |
2849 | tconInfoFree(tcon); | |
2850 | return ERR_PTR(rc); | |
2851 | } | |
2852 | ||
9d002df4 JL |
2853 | void |
2854 | cifs_put_tlink(struct tcon_link *tlink) | |
2855 | { | |
2856 | if (!tlink || IS_ERR(tlink)) | |
2857 | return; | |
2858 | ||
2859 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
2860 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
2861 | tlink->tl_time = jiffies; | |
2862 | return; | |
2863 | } | |
2864 | ||
2865 | if (!IS_ERR(tlink_tcon(tlink))) | |
2866 | cifs_put_tcon(tlink_tcon(tlink)); | |
2867 | kfree(tlink); | |
2868 | return; | |
2869 | } | |
d00c28de | 2870 | |
25c7f41e | 2871 | static inline struct tcon_link * |
cd51875d PS |
2872 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
2873 | { | |
2874 | return cifs_sb->master_tlink; | |
2875 | } | |
25c7f41e PS |
2876 | |
2877 | static int | |
2878 | compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
2879 | { | |
2880 | struct cifs_sb_info *old = CIFS_SB(sb); | |
2881 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
2882 | ||
2883 | if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) | |
2884 | return 0; | |
2885 | ||
2886 | if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) != | |
2887 | (new->mnt_cifs_flags & CIFS_MOUNT_MASK)) | |
2888 | return 0; | |
2889 | ||
25c7f41e | 2890 | /* |
5eba8ab3 JL |
2891 | * We want to share sb only if we don't specify an r/wsize or |
2892 | * specified r/wsize is greater than or equal to existing one. | |
25c7f41e PS |
2893 | */ |
2894 | if (new->wsize && new->wsize < old->wsize) | |
2895 | return 0; | |
2896 | ||
5eba8ab3 JL |
2897 | if (new->rsize && new->rsize < old->rsize) |
2898 | return 0; | |
2899 | ||
1f68233c | 2900 | if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid)) |
25c7f41e PS |
2901 | return 0; |
2902 | ||
2903 | if (old->mnt_file_mode != new->mnt_file_mode || | |
2904 | old->mnt_dir_mode != new->mnt_dir_mode) | |
2905 | return 0; | |
2906 | ||
2907 | if (strcmp(old->local_nls->charset, new->local_nls->charset)) | |
2908 | return 0; | |
2909 | ||
2910 | if (old->actimeo != new->actimeo) | |
2911 | return 0; | |
2912 | ||
2913 | return 1; | |
2914 | } | |
2915 | ||
c1d8b24d SP |
2916 | static int |
2917 | match_prepath(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
2918 | { | |
2919 | struct cifs_sb_info *old = CIFS_SB(sb); | |
2920 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
cd8c4296 SP |
2921 | bool old_set = old->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH; |
2922 | bool new_set = new->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH; | |
c1d8b24d | 2923 | |
cd8c4296 | 2924 | if (old_set && new_set && !strcmp(new->prepath, old->prepath)) |
c1d8b24d | 2925 | return 1; |
cd8c4296 SP |
2926 | else if (!old_set && !new_set) |
2927 | return 1; | |
2928 | ||
c1d8b24d SP |
2929 | return 0; |
2930 | } | |
2931 | ||
25c7f41e PS |
2932 | int |
2933 | cifs_match_super(struct super_block *sb, void *data) | |
2934 | { | |
2935 | struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; | |
2936 | struct smb_vol *volume_info; | |
2937 | struct cifs_sb_info *cifs_sb; | |
2938 | struct TCP_Server_Info *tcp_srv; | |
96daf2b0 SF |
2939 | struct cifs_ses *ses; |
2940 | struct cifs_tcon *tcon; | |
25c7f41e | 2941 | struct tcon_link *tlink; |
25c7f41e PS |
2942 | int rc = 0; |
2943 | ||
25c7f41e PS |
2944 | spin_lock(&cifs_tcp_ses_lock); |
2945 | cifs_sb = CIFS_SB(sb); | |
2946 | tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
2947 | if (IS_ERR(tlink)) { | |
2948 | spin_unlock(&cifs_tcp_ses_lock); | |
2949 | return rc; | |
2950 | } | |
2951 | tcon = tlink_tcon(tlink); | |
2952 | ses = tcon->ses; | |
2953 | tcp_srv = ses->server; | |
2954 | ||
2955 | volume_info = mnt_data->vol; | |
2956 | ||
9fa114f7 | 2957 | if (!match_server(tcp_srv, volume_info) || |
25c7f41e | 2958 | !match_session(ses, volume_info) || |
ae6f8dd4 | 2959 | !match_tcon(tcon, volume_info) || |
c1d8b24d | 2960 | !match_prepath(sb, mnt_data)) { |
25c7f41e PS |
2961 | rc = 0; |
2962 | goto out; | |
2963 | } | |
2964 | ||
2965 | rc = compare_mount_options(sb, mnt_data); | |
2966 | out: | |
25c7f41e | 2967 | spin_unlock(&cifs_tcp_ses_lock); |
f484b5d0 | 2968 | cifs_put_tlink(tlink); |
25c7f41e PS |
2969 | return rc; |
2970 | } | |
2971 | ||
1da177e4 | 2972 | int |
b669f33c | 2973 | get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path, |
2e6e02ab PS |
2974 | const struct nls_table *nls_codepage, unsigned int *num_referrals, |
2975 | struct dfs_info3_param **referrals, int remap) | |
1da177e4 LT |
2976 | { |
2977 | char *temp_unc; | |
2978 | int rc = 0; | |
2979 | ||
b669f33c | 2980 | if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer) |
2e6e02ab PS |
2981 | return -ENOSYS; |
2982 | ||
2983 | *num_referrals = 0; | |
2984 | *referrals = NULL; | |
1da177e4 | 2985 | |
2e6e02ab | 2986 | if (ses->ipc_tid == 0) { |
1da177e4 | 2987 | temp_unc = kmalloc(2 /* for slashes */ + |
2e6e02ab PS |
2988 | strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2) |
2989 | + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL); | |
1da177e4 LT |
2990 | if (temp_unc == NULL) |
2991 | return -ENOMEM; | |
2992 | temp_unc[0] = '\\'; | |
2993 | temp_unc[1] = '\\'; | |
2e6e02ab PS |
2994 | strcpy(temp_unc + 2, ses->serverName); |
2995 | strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$"); | |
2996 | rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL, | |
2997 | nls_codepage); | |
f96637be | 2998 | cifs_dbg(FYI, "Tcon rc = %d ipc_tid = %d\n", rc, ses->ipc_tid); |
1da177e4 LT |
2999 | kfree(temp_unc); |
3000 | } | |
3001 | if (rc == 0) | |
b669f33c PS |
3002 | rc = ses->server->ops->get_dfs_refer(xid, ses, old_path, |
3003 | referrals, num_referrals, | |
3004 | nls_codepage, remap); | |
2e6e02ab PS |
3005 | /* |
3006 | * BB - map targetUNCs to dfs_info3 structures, here or in | |
b669f33c | 3007 | * ses->server->ops->get_dfs_refer. |
2e6e02ab | 3008 | */ |
1da177e4 LT |
3009 | |
3010 | return rc; | |
3011 | } | |
3012 | ||
09e50d55 JL |
3013 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
3014 | static struct lock_class_key cifs_key[2]; | |
3015 | static struct lock_class_key cifs_slock_key[2]; | |
3016 | ||
3017 | static inline void | |
3018 | cifs_reclassify_socket4(struct socket *sock) | |
3019 | { | |
3020 | struct sock *sk = sock->sk; | |
fafc4e1e | 3021 | BUG_ON(!sock_allow_reclassification(sk)); |
09e50d55 JL |
3022 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", |
3023 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
3024 | } | |
3025 | ||
3026 | static inline void | |
3027 | cifs_reclassify_socket6(struct socket *sock) | |
3028 | { | |
3029 | struct sock *sk = sock->sk; | |
fafc4e1e | 3030 | BUG_ON(!sock_allow_reclassification(sk)); |
09e50d55 JL |
3031 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", |
3032 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
3033 | } | |
3034 | #else | |
3035 | static inline void | |
3036 | cifs_reclassify_socket4(struct socket *sock) | |
3037 | { | |
3038 | } | |
3039 | ||
3040 | static inline void | |
3041 | cifs_reclassify_socket6(struct socket *sock) | |
3042 | { | |
3043 | } | |
3044 | #endif | |
3045 | ||
1da177e4 | 3046 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 3047 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 3048 | { |
50c2f753 | 3049 | unsigned int i, j; |
1da177e4 | 3050 | |
50c2f753 | 3051 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
3052 | /* mask a nibble at a time and encode */ |
3053 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
3054 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 3055 | j += 2; |
1da177e4 LT |
3056 | } |
3057 | ||
3058 | } | |
3059 | ||
3eb9a889 BG |
3060 | static int |
3061 | bind_socket(struct TCP_Server_Info *server) | |
3062 | { | |
3063 | int rc = 0; | |
3064 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
3065 | /* Bind to the specified local IP address */ | |
3066 | struct socket *socket = server->ssocket; | |
3067 | rc = socket->ops->bind(socket, | |
3068 | (struct sockaddr *) &server->srcaddr, | |
3069 | sizeof(server->srcaddr)); | |
3070 | if (rc < 0) { | |
3071 | struct sockaddr_in *saddr4; | |
3072 | struct sockaddr_in6 *saddr6; | |
3073 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
3074 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
3075 | if (saddr6->sin6_family == AF_INET6) | |
f96637be JP |
3076 | cifs_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n", |
3077 | &saddr6->sin6_addr, rc); | |
3eb9a889 | 3078 | else |
f96637be JP |
3079 | cifs_dbg(VFS, "Failed to bind to: %pI4, error: %d\n", |
3080 | &saddr4->sin_addr.s_addr, rc); | |
3eb9a889 BG |
3081 | } |
3082 | } | |
3083 | return rc; | |
3084 | } | |
1da177e4 LT |
3085 | |
3086 | static int | |
a9f1b85e | 3087 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
3088 | { |
3089 | int rc = 0; | |
a9f1b85e PS |
3090 | /* |
3091 | * some servers require RFC1001 sessinit before sending | |
3092 | * negprot - BB check reconnection in case where second | |
3093 | * sessinit is sent but no second negprot | |
3094 | */ | |
3095 | struct rfc1002_session_packet *ses_init_buf; | |
3096 | struct smb_hdr *smb_buf; | |
3097 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
3098 | GFP_KERNEL); | |
3099 | if (ses_init_buf) { | |
3100 | ses_init_buf->trailer.session_req.called_len = 32; | |
3101 | ||
997152f6 | 3102 | if (server->server_RFC1001_name[0] != 0) |
a9f1b85e PS |
3103 | rfc1002mangle(ses_init_buf->trailer. |
3104 | session_req.called_name, | |
3105 | server->server_RFC1001_name, | |
3106 | RFC1001_NAME_LEN_WITH_NULL); | |
3107 | else | |
3108 | rfc1002mangle(ses_init_buf->trailer. | |
3109 | session_req.called_name, | |
3110 | DEFAULT_CIFS_CALLED_NAME, | |
3111 | RFC1001_NAME_LEN_WITH_NULL); | |
3112 | ||
3113 | ses_init_buf->trailer.session_req.calling_len = 32; | |
3114 | ||
3115 | /* | |
3116 | * calling name ends in null (byte 16) from old smb | |
3117 | * convention. | |
3118 | */ | |
c85c35f8 | 3119 | if (server->workstation_RFC1001_name[0] != 0) |
a9f1b85e PS |
3120 | rfc1002mangle(ses_init_buf->trailer. |
3121 | session_req.calling_name, | |
3122 | server->workstation_RFC1001_name, | |
3123 | RFC1001_NAME_LEN_WITH_NULL); | |
3124 | else | |
3125 | rfc1002mangle(ses_init_buf->trailer. | |
3126 | session_req.calling_name, | |
3127 | "LINUX_CIFS_CLNT", | |
3128 | RFC1001_NAME_LEN_WITH_NULL); | |
3129 | ||
3130 | ses_init_buf->trailer.session_req.scope1 = 0; | |
3131 | ses_init_buf->trailer.session_req.scope2 = 0; | |
3132 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
3133 | ||
3134 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
be8e3b00 | 3135 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
a9f1b85e PS |
3136 | rc = smb_send(server, smb_buf, 0x44); |
3137 | kfree(ses_init_buf); | |
3138 | /* | |
3139 | * RFC1001 layer in at least one server | |
3140 | * requires very short break before negprot | |
3141 | * presumably because not expecting negprot | |
3142 | * to follow so fast. This is a simple | |
3143 | * solution that works without | |
3144 | * complicating the code and causes no | |
3145 | * significant slowing down on mount | |
3146 | * for everyone else | |
3147 | */ | |
3148 | usleep_range(1000, 2000); | |
3149 | } | |
3150 | /* | |
3151 | * else the negprot may still work without this | |
3152 | * even though malloc failed | |
3153 | */ | |
3154 | ||
3155 | return rc; | |
3156 | } | |
3157 | ||
3158 | static int | |
3159 | generic_ip_connect(struct TCP_Server_Info *server) | |
3160 | { | |
3161 | int rc = 0; | |
6da97910 | 3162 | __be16 sport; |
a9f1b85e | 3163 | int slen, sfamily; |
bcf4b106 | 3164 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
3165 | struct sockaddr *saddr; |
3166 | ||
3167 | saddr = (struct sockaddr *) &server->dstaddr; | |
3168 | ||
3169 | if (server->dstaddr.ss_family == AF_INET6) { | |
3170 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
3171 | slen = sizeof(struct sockaddr_in6); | |
3172 | sfamily = AF_INET6; | |
3173 | } else { | |
3174 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
3175 | slen = sizeof(struct sockaddr_in); | |
3176 | sfamily = AF_INET; | |
3177 | } | |
1da177e4 | 3178 | |
bcf4b106 | 3179 | if (socket == NULL) { |
f1d0c998 RL |
3180 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
3181 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 3182 | if (rc < 0) { |
f96637be | 3183 | cifs_dbg(VFS, "Error %d creating socket\n", rc); |
a9f1b85e | 3184 | server->ssocket = NULL; |
1da177e4 | 3185 | return rc; |
1da177e4 | 3186 | } |
bcf4b106 JL |
3187 | |
3188 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
f96637be | 3189 | cifs_dbg(FYI, "Socket created\n"); |
bcf4b106 JL |
3190 | server->ssocket = socket; |
3191 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
3192 | if (sfamily == AF_INET6) |
3193 | cifs_reclassify_socket6(socket); | |
3194 | else | |
3195 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
3196 | } |
3197 | ||
3eb9a889 BG |
3198 | rc = bind_socket(server); |
3199 | if (rc < 0) | |
3200 | return rc; | |
3201 | ||
bcf4b106 JL |
3202 | /* |
3203 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
3204 | * the default. sock_setsockopt not used because it expects |
3205 | * user space buffer | |
bcf4b106 JL |
3206 | */ |
3207 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 3208 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 3209 | |
b387eaeb | 3210 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
3211 | if (server->noautotune) { |
3212 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
3213 | socket->sk->sk_sndbuf = 200 * 1024; | |
3214 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
3215 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 3216 | } |
1da177e4 | 3217 | |
6a5fa236 | 3218 | if (server->tcp_nodelay) { |
a9f1b85e | 3219 | int val = 1; |
6a5fa236 SF |
3220 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
3221 | (char *)&val, sizeof(val)); | |
3222 | if (rc) | |
f96637be JP |
3223 | cifs_dbg(FYI, "set TCP_NODELAY socket option error %d\n", |
3224 | rc); | |
6a5fa236 SF |
3225 | } |
3226 | ||
f96637be | 3227 | cifs_dbg(FYI, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n", |
bcf4b106 | 3228 | socket->sk->sk_sndbuf, |
b6b38f70 | 3229 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 3230 | |
ee1b3ea9 JL |
3231 | rc = socket->ops->connect(socket, saddr, slen, 0); |
3232 | if (rc < 0) { | |
f96637be | 3233 | cifs_dbg(FYI, "Error %d connecting to server\n", rc); |
ee1b3ea9 JL |
3234 | sock_release(socket); |
3235 | server->ssocket = NULL; | |
3236 | return rc; | |
3237 | } | |
3238 | ||
a9f1b85e PS |
3239 | if (sport == htons(RFC1001_PORT)) |
3240 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 3241 | |
1da177e4 LT |
3242 | return rc; |
3243 | } | |
3244 | ||
3245 | static int | |
a9f1b85e | 3246 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 3247 | { |
6da97910 | 3248 | __be16 *sport; |
a9f1b85e PS |
3249 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
3250 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 3251 | |
a9f1b85e PS |
3252 | if (server->dstaddr.ss_family == AF_INET6) |
3253 | sport = &addr6->sin6_port; | |
3254 | else | |
3255 | sport = &addr->sin_port; | |
1da177e4 | 3256 | |
a9f1b85e PS |
3257 | if (*sport == 0) { |
3258 | int rc; | |
1da177e4 | 3259 | |
a9f1b85e PS |
3260 | /* try with 445 port at first */ |
3261 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 3262 | |
a9f1b85e | 3263 | rc = generic_ip_connect(server); |
1da177e4 | 3264 | if (rc >= 0) |
a9f1b85e | 3265 | return rc; |
6a5fa236 | 3266 | |
a9f1b85e PS |
3267 | /* if it failed, try with 139 port */ |
3268 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
3269 | } |
3270 | ||
a9f1b85e | 3271 | return generic_ip_connect(server); |
1da177e4 LT |
3272 | } |
3273 | ||
6d5786a3 | 3274 | void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon, |
2c6292ae | 3275 | struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) |
8af18971 SF |
3276 | { |
3277 | /* if we are reconnecting then should we check to see if | |
3278 | * any requested capabilities changed locally e.g. via | |
3279 | * remount but we can not do much about it here | |
3280 | * if they have (even if we could detect it by the following) | |
3281 | * Perhaps we could add a backpointer to array of sb from tcon | |
3282 | * or if we change to make all sb to same share the same | |
3283 | * sb as NFS - then we only have one backpointer to sb. | |
3284 | * What if we wanted to mount the server share twice once with | |
3285 | * and once without posixacls or posix paths? */ | |
3286 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 3287 | |
c18c842b SF |
3288 | if (vol_info && vol_info->no_linux_ext) { |
3289 | tcon->fsUnixInfo.Capability = 0; | |
3290 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
f96637be | 3291 | cifs_dbg(FYI, "Linux protocol extensions disabled\n"); |
c18c842b SF |
3292 | return; |
3293 | } else if (vol_info) | |
3294 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
3295 | ||
3296 | if (tcon->unix_ext == 0) { | |
f96637be | 3297 | cifs_dbg(FYI, "Unix extensions disabled so not set on reconnect\n"); |
c18c842b SF |
3298 | return; |
3299 | } | |
50c2f753 | 3300 | |
fb8c4b14 | 3301 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 3302 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
f96637be | 3303 | cifs_dbg(FYI, "unix caps which server supports %lld\n", cap); |
8af18971 SF |
3304 | /* check for reconnect case in which we do not |
3305 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 3306 | if (vol_info == NULL) { |
50c2f753 | 3307 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
3308 | originally at mount time */ |
3309 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
3310 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
3311 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
3312 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
f96637be | 3313 | cifs_dbg(VFS, "POSIXPATH support change\n"); |
8af18971 | 3314 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 3315 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
f96637be JP |
3316 | cifs_dbg(VFS, "possible reconnect error\n"); |
3317 | cifs_dbg(VFS, "server disabled POSIX path support\n"); | |
11b6d645 | 3318 | } |
8af18971 | 3319 | } |
50c2f753 | 3320 | |
6848b733 | 3321 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
f96637be | 3322 | cifs_dbg(VFS, "per-share encryption not supported yet\n"); |
6848b733 | 3323 | |
8af18971 | 3324 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 3325 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 3326 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 3327 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
f96637be | 3328 | cifs_dbg(FYI, "negotiated posix acl support\n"); |
2c6292ae AV |
3329 | if (cifs_sb) |
3330 | cifs_sb->mnt_cifs_flags |= | |
3331 | CIFS_MOUNT_POSIXACL; | |
8af18971 SF |
3332 | } |
3333 | ||
75865f8c | 3334 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 3335 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 3336 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
f96637be | 3337 | cifs_dbg(FYI, "negotiate posix pathnames\n"); |
2c6292ae AV |
3338 | if (cifs_sb) |
3339 | cifs_sb->mnt_cifs_flags |= | |
8af18971 SF |
3340 | CIFS_MOUNT_POSIX_PATHS; |
3341 | } | |
50c2f753 | 3342 | |
f96637be | 3343 | cifs_dbg(FYI, "Negotiate caps 0x%x\n", (int)cap); |
8af18971 | 3344 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 3345 | if (cap & CIFS_UNIX_FCNTL_CAP) |
f96637be | 3346 | cifs_dbg(FYI, "FCNTL cap\n"); |
75865f8c | 3347 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
f96637be | 3348 | cifs_dbg(FYI, "EXTATTR cap\n"); |
75865f8c | 3349 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
f96637be | 3350 | cifs_dbg(FYI, "POSIX path cap\n"); |
75865f8c | 3351 | if (cap & CIFS_UNIX_XATTR_CAP) |
f96637be | 3352 | cifs_dbg(FYI, "XATTR cap\n"); |
75865f8c | 3353 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
f96637be | 3354 | cifs_dbg(FYI, "POSIX ACL cap\n"); |
75865f8c | 3355 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
f96637be | 3356 | cifs_dbg(FYI, "very large read cap\n"); |
75865f8c | 3357 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
f96637be | 3358 | cifs_dbg(FYI, "very large write cap\n"); |
6848b733 | 3359 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
f96637be | 3360 | cifs_dbg(FYI, "transport encryption cap\n"); |
6848b733 | 3361 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
f96637be | 3362 | cifs_dbg(FYI, "mandatory transport encryption cap\n"); |
8af18971 SF |
3363 | #endif /* CIFS_DEBUG2 */ |
3364 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 3365 | if (vol_info == NULL) { |
f96637be | 3366 | cifs_dbg(FYI, "resetting capabilities failed\n"); |
442aa310 | 3367 | } else |
f96637be | 3368 | 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 | 3369 | |
8af18971 SF |
3370 | } |
3371 | } | |
3372 | } | |
3373 | ||
4214ebf4 | 3374 | int cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
724d9f1c | 3375 | struct cifs_sb_info *cifs_sb) |
b1c8d2b4 | 3376 | { |
2de970ff JL |
3377 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
3378 | ||
2ced6f69 AV |
3379 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
3380 | cifs_sb->tlink_tree = RB_ROOT; | |
3381 | ||
25c7f41e | 3382 | /* |
5eba8ab3 JL |
3383 | * Temporarily set r/wsize for matching superblock. If we end up using |
3384 | * new sb then client will later negotiate it downward if needed. | |
25c7f41e | 3385 | */ |
5eba8ab3 | 3386 | cifs_sb->rsize = pvolume_info->rsize; |
25c7f41e PS |
3387 | cifs_sb->wsize = pvolume_info->wsize; |
3388 | ||
3b795210 SF |
3389 | cifs_sb->mnt_uid = pvolume_info->linux_uid; |
3390 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
3391 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
3392 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
f96637be JP |
3393 | cifs_dbg(FYI, "file mode: 0x%hx dir mode: 0x%hx\n", |
3394 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); | |
3b795210 | 3395 | |
6d20e840 | 3396 | cifs_sb->actimeo = pvolume_info->actimeo; |
724d9f1c | 3397 | cifs_sb->local_nls = pvolume_info->local_nls; |
6d20e840 | 3398 | |
3b795210 SF |
3399 | if (pvolume_info->noperm) |
3400 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
3401 | if (pvolume_info->setuids) | |
3402 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
95932655 SF |
3403 | if (pvolume_info->setuidfromacl) |
3404 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UID_FROM_ACL; | |
3b795210 SF |
3405 | if (pvolume_info->server_ino) |
3406 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
3407 | if (pvolume_info->remap) | |
2baa2682 SF |
3408 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SFM_CHR; |
3409 | if (pvolume_info->sfu_remap) | |
3b795210 SF |
3410 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; |
3411 | if (pvolume_info->no_xattr) | |
3412 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
3413 | if (pvolume_info->sfu_emul) | |
3414 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
3415 | if (pvolume_info->nobrl) | |
3416 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 3417 | if (pvolume_info->nostrictsync) |
4717bed6 | 3418 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
3419 | if (pvolume_info->mand_lock) |
3420 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
d4ffff1f PS |
3421 | if (pvolume_info->rwpidforward) |
3422 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; | |
3b795210 SF |
3423 | if (pvolume_info->cifs_acl) |
3424 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
3c7c87fd | 3425 | if (pvolume_info->backupuid_specified) { |
3d3ea8e6 | 3426 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; |
3c7c87fd SP |
3427 | cifs_sb->mnt_backupuid = pvolume_info->backupuid; |
3428 | } | |
3429 | if (pvolume_info->backupgid_specified) { | |
3d3ea8e6 | 3430 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; |
3c7c87fd SP |
3431 | cifs_sb->mnt_backupgid = pvolume_info->backupgid; |
3432 | } | |
3b795210 SF |
3433 | if (pvolume_info->override_uid) |
3434 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
3435 | if (pvolume_info->override_gid) | |
3436 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
3437 | if (pvolume_info->dynperm) | |
3438 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
3439 | if (pvolume_info->fsc) |
3440 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
3441 | if (pvolume_info->multiuser) |
3442 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
3443 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
3444 | if (pvolume_info->strict_io) |
3445 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 3446 | if (pvolume_info->direct_io) { |
f96637be | 3447 | cifs_dbg(FYI, "mounting share using direct i/o\n"); |
3b795210 SF |
3448 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
3449 | } | |
736a3320 SM |
3450 | if (pvolume_info->mfsymlinks) { |
3451 | if (pvolume_info->sfu_emul) { | |
db8b631d SF |
3452 | /* |
3453 | * Our SFU ("Services for Unix" emulation does not allow | |
3454 | * creating symlinks but does allow reading existing SFU | |
3455 | * symlinks (it does allow both creating and reading SFU | |
3456 | * style mknod and FIFOs though). When "mfsymlinks" and | |
3457 | * "sfu" are both enabled at the same time, it allows | |
3458 | * reading both types of symlinks, but will only create | |
3459 | * them with mfsymlinks format. This allows better | |
3460 | * Apple compatibility (probably better for Samba too) | |
3461 | * while still recognizing old Windows style symlinks. | |
3462 | */ | |
3463 | cifs_dbg(VFS, "mount options mfsymlinks and sfu both enabled\n"); | |
736a3320 | 3464 | } |
db8b631d | 3465 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; |
736a3320 | 3466 | } |
3b795210 SF |
3467 | |
3468 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
f96637be | 3469 | cifs_dbg(VFS, "mount option dynperm ignored if cifsacl mount option supported\n"); |
4214ebf4 SP |
3470 | |
3471 | if (pvolume_info->prepath) { | |
3472 | cifs_sb->prepath = kstrdup(pvolume_info->prepath, GFP_KERNEL); | |
3473 | if (cifs_sb->prepath == NULL) | |
3474 | return -ENOMEM; | |
3475 | } | |
3476 | ||
3477 | return 0; | |
b1c8d2b4 JL |
3478 | } |
3479 | ||
b9bce2e9 JL |
3480 | static void |
3481 | cleanup_volume_info_contents(struct smb_vol *volume_info) | |
1bfe73c2 | 3482 | { |
b946845a | 3483 | kfree(volume_info->username); |
1bfe73c2 | 3484 | kzfree(volume_info->password); |
95c75454 | 3485 | kfree(volume_info->UNC); |
b946845a SF |
3486 | kfree(volume_info->domainname); |
3487 | kfree(volume_info->iocharset); | |
1bfe73c2 | 3488 | kfree(volume_info->prepath); |
b9bce2e9 JL |
3489 | } |
3490 | ||
3491 | void | |
3492 | cifs_cleanup_volume_info(struct smb_vol *volume_info) | |
3493 | { | |
3494 | if (!volume_info) | |
3495 | return; | |
3496 | cleanup_volume_info_contents(volume_info); | |
1bfe73c2 | 3497 | kfree(volume_info); |
1bfe73c2 IM |
3498 | } |
3499 | ||
b9bce2e9 | 3500 | |
2d6d589d | 3501 | #ifdef CONFIG_CIFS_DFS_UPCALL |
6d3ea7e4 SF |
3502 | /* |
3503 | * cifs_build_path_to_root returns full path to root when we do not have an | |
3504 | * exiting connection (tcon) | |
3505 | */ | |
1bfe73c2 | 3506 | static char * |
b2a0fa15 | 3507 | build_unc_path_to_root(const struct smb_vol *vol, |
1bfe73c2 IM |
3508 | const struct cifs_sb_info *cifs_sb) |
3509 | { | |
b2a0fa15 | 3510 | char *full_path, *pos; |
839db3d1 | 3511 | unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0; |
b2a0fa15 | 3512 | unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); |
1bfe73c2 | 3513 | |
b2a0fa15 | 3514 | full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); |
1bfe73c2 IM |
3515 | if (full_path == NULL) |
3516 | return ERR_PTR(-ENOMEM); | |
3517 | ||
b2a0fa15 JL |
3518 | strncpy(full_path, vol->UNC, unc_len); |
3519 | pos = full_path + unc_len; | |
3520 | ||
3521 | if (pplen) { | |
1fc29bac JL |
3522 | *pos = CIFS_DIR_SEP(cifs_sb); |
3523 | strncpy(pos + 1, vol->prepath, pplen); | |
b2a0fa15 JL |
3524 | pos += pplen; |
3525 | } | |
3526 | ||
3527 | *pos = '\0'; /* add trailing null */ | |
f87d39d9 | 3528 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
f96637be | 3529 | cifs_dbg(FYI, "%s: full_path=%s\n", __func__, full_path); |
1bfe73c2 IM |
3530 | return full_path; |
3531 | } | |
dd613945 SF |
3532 | |
3533 | /* | |
3534 | * Perform a dfs referral query for a share and (optionally) prefix | |
3535 | * | |
046462ab SF |
3536 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
3537 | * to a string containing updated options for the submount. Otherwise it | |
3538 | * will be left untouched. | |
dd613945 SF |
3539 | * |
3540 | * Returns the rc from get_dfs_path to the caller, which can be used to | |
3541 | * determine whether there were referrals. | |
3542 | */ | |
3543 | static int | |
b669f33c | 3544 | expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses, |
dd613945 | 3545 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, |
046462ab | 3546 | int check_prefix) |
dd613945 SF |
3547 | { |
3548 | int rc; | |
3549 | unsigned int num_referrals = 0; | |
3550 | struct dfs_info3_param *referrals = NULL; | |
3551 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; | |
3552 | ||
3553 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
3554 | if (IS_ERR(full_path)) | |
3555 | return PTR_ERR(full_path); | |
3556 | ||
3557 | /* For DFS paths, skip the first '\' of the UNC */ | |
3558 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; | |
3559 | ||
b669f33c | 3560 | rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls, |
2baa2682 | 3561 | &num_referrals, &referrals, cifs_remap(cifs_sb)); |
dd613945 SF |
3562 | |
3563 | if (!rc && num_referrals > 0) { | |
3564 | char *fake_devname = NULL; | |
3565 | ||
3566 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, | |
3567 | full_path + 1, referrals, | |
3568 | &fake_devname); | |
3569 | ||
3570 | free_dfs_info_array(referrals, num_referrals); | |
046462ab | 3571 | |
dd613945 SF |
3572 | if (IS_ERR(mdata)) { |
3573 | rc = PTR_ERR(mdata); | |
3574 | mdata = NULL; | |
b9bce2e9 JL |
3575 | } else { |
3576 | cleanup_volume_info_contents(volume_info); | |
b9bce2e9 JL |
3577 | rc = cifs_setup_volume_info(volume_info, mdata, |
3578 | fake_devname); | |
dd613945 | 3579 | } |
b9bce2e9 JL |
3580 | kfree(fake_devname); |
3581 | kfree(cifs_sb->mountdata); | |
046462ab | 3582 | cifs_sb->mountdata = mdata; |
dd613945 SF |
3583 | } |
3584 | kfree(full_path); | |
3585 | return rc; | |
3586 | } | |
2d6d589d | 3587 | #endif |
1bfe73c2 | 3588 | |
04db79b0 JL |
3589 | static int |
3590 | cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, | |
3591 | const char *devname) | |
1da177e4 | 3592 | { |
724d9f1c | 3593 | int rc = 0; |
1da177e4 | 3594 | |
04db79b0 JL |
3595 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) |
3596 | return -EINVAL; | |
1da177e4 | 3597 | |
7586b765 | 3598 | if (volume_info->nullauth) { |
f96637be | 3599 | cifs_dbg(FYI, "Anonymous login\n"); |
04febabc JL |
3600 | kfree(volume_info->username); |
3601 | volume_info->username = NULL; | |
7586b765 | 3602 | } else if (volume_info->username) { |
1da177e4 | 3603 | /* BB fixme parse for domain name here */ |
f96637be | 3604 | cifs_dbg(FYI, "Username: %s\n", volume_info->username); |
1da177e4 | 3605 | } else { |
f96637be | 3606 | cifs_dbg(VFS, "No username specified\n"); |
50c2f753 SF |
3607 | /* In userspace mount helper we can get user name from alternate |
3608 | locations such as env variables and files on disk */ | |
04db79b0 | 3609 | return -EINVAL; |
1da177e4 LT |
3610 | } |
3611 | ||
1da177e4 | 3612 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 3613 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
3614 | /* load_nls_default cannot return null */ |
3615 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 3616 | } else { |
a5fc4ce0 JL |
3617 | volume_info->local_nls = load_nls(volume_info->iocharset); |
3618 | if (volume_info->local_nls == NULL) { | |
f96637be | 3619 | cifs_dbg(VFS, "CIFS mount error: iocharset %s not found\n", |
b6b38f70 | 3620 | volume_info->iocharset); |
04db79b0 | 3621 | return -ELIBACC; |
1da177e4 LT |
3622 | } |
3623 | } | |
724d9f1c | 3624 | |
724d9f1c PS |
3625 | return rc; |
3626 | } | |
3627 | ||
04db79b0 JL |
3628 | struct smb_vol * |
3629 | cifs_get_volume_info(char *mount_data, const char *devname) | |
3630 | { | |
3631 | int rc; | |
3632 | struct smb_vol *volume_info; | |
3633 | ||
6ee9542a | 3634 | volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL); |
04db79b0 JL |
3635 | if (!volume_info) |
3636 | return ERR_PTR(-ENOMEM); | |
3637 | ||
3638 | rc = cifs_setup_volume_info(volume_info, mount_data, devname); | |
3639 | if (rc) { | |
3640 | cifs_cleanup_volume_info(volume_info); | |
3641 | volume_info = ERR_PTR(rc); | |
3642 | } | |
3643 | ||
3644 | return volume_info; | |
3645 | } | |
3646 | ||
a6b5058f AA |
3647 | static int |
3648 | cifs_are_all_path_components_accessible(struct TCP_Server_Info *server, | |
3649 | unsigned int xid, | |
3650 | struct cifs_tcon *tcon, | |
3651 | struct cifs_sb_info *cifs_sb, | |
3652 | char *full_path) | |
3653 | { | |
3654 | int rc; | |
3655 | char *s; | |
3656 | char sep, tmp; | |
3657 | ||
3658 | sep = CIFS_DIR_SEP(cifs_sb); | |
3659 | s = full_path; | |
3660 | ||
3661 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, ""); | |
3662 | while (rc == 0) { | |
3663 | /* skip separators */ | |
3664 | while (*s == sep) | |
3665 | s++; | |
3666 | if (!*s) | |
3667 | break; | |
3668 | /* next separator */ | |
3669 | while (*s && *s != sep) | |
3670 | s++; | |
3671 | ||
3672 | /* | |
3673 | * temporarily null-terminate the path at the end of | |
3674 | * the current component | |
3675 | */ | |
3676 | tmp = *s; | |
3677 | *s = 0; | |
3678 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, | |
3679 | full_path); | |
3680 | *s = tmp; | |
3681 | } | |
3682 | return rc; | |
3683 | } | |
3684 | ||
724d9f1c | 3685 | int |
2c6292ae | 3686 | cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) |
724d9f1c | 3687 | { |
1daaae8f | 3688 | int rc; |
6d5786a3 | 3689 | unsigned int xid; |
af4281dc | 3690 | struct cifs_ses *ses; |
96daf2b0 | 3691 | struct cifs_tcon *tcon; |
af4281dc | 3692 | struct TCP_Server_Info *server; |
724d9f1c PS |
3693 | char *full_path; |
3694 | struct tcon_link *tlink; | |
3695 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
3696 | int referral_walks_count = 0; | |
20547490 | 3697 | #endif |
dd854466 | 3698 | |
20547490 | 3699 | #ifdef CONFIG_CIFS_DFS_UPCALL |
724d9f1c PS |
3700 | try_mount_again: |
3701 | /* cleanup activities if we're chasing a referral */ | |
3702 | if (referral_walks_count) { | |
3703 | if (tcon) | |
3704 | cifs_put_tcon(tcon); | |
af4281dc PS |
3705 | else if (ses) |
3706 | cifs_put_smb_ses(ses); | |
724d9f1c | 3707 | |
1dfd18d0 SP |
3708 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_POSIX_PATHS; |
3709 | ||
6d5786a3 | 3710 | free_xid(xid); |
724d9f1c PS |
3711 | } |
3712 | #endif | |
1daaae8f | 3713 | rc = 0; |
724d9f1c | 3714 | tcon = NULL; |
af4281dc PS |
3715 | ses = NULL; |
3716 | server = NULL; | |
724d9f1c PS |
3717 | full_path = NULL; |
3718 | tlink = NULL; | |
3719 | ||
6d5786a3 | 3720 | xid = get_xid(); |
1da177e4 | 3721 | |
63c038c2 | 3722 | /* get a reference to a tcp session */ |
af4281dc PS |
3723 | server = cifs_get_tcp_session(volume_info); |
3724 | if (IS_ERR(server)) { | |
3725 | rc = PTR_ERR(server); | |
63c038c2 | 3726 | goto out; |
1da177e4 | 3727 | } |
141891f4 SF |
3728 | if ((volume_info->max_credits < 20) || |
3729 | (volume_info->max_credits > 60000)) | |
3730 | server->max_credits = SMB2_MAX_CREDITS_AVAILABLE; | |
3731 | else | |
3732 | server->max_credits = volume_info->max_credits; | |
36988c76 | 3733 | /* get a reference to a SMB session */ |
af4281dc PS |
3734 | ses = cifs_get_smb_ses(server, volume_info); |
3735 | if (IS_ERR(ses)) { | |
3736 | rc = PTR_ERR(ses); | |
3737 | ses = NULL; | |
36988c76 | 3738 | goto mount_fail_check; |
1da177e4 | 3739 | } |
50c2f753 | 3740 | |
592fafe6 | 3741 | #ifdef CONFIG_CIFS_SMB2 |
b618f001 SF |
3742 | if ((volume_info->persistent == true) && ((ses->server->capabilities & |
3743 | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) == 0)) { | |
3744 | cifs_dbg(VFS, "persistent handles not supported by server\n"); | |
3745 | rc = -EOPNOTSUPP; | |
3746 | goto mount_fail_check; | |
3747 | } | |
592fafe6 SF |
3748 | #endif /* CONFIG_CIFS_SMB2*/ |
3749 | ||
d00c28de | 3750 | /* search for existing tcon to this server share */ |
af4281dc | 3751 | tcon = cifs_get_tcon(ses, volume_info); |
d00c28de JL |
3752 | if (IS_ERR(tcon)) { |
3753 | rc = PTR_ERR(tcon); | |
3754 | tcon = NULL; | |
40920c2b MS |
3755 | if (rc == -EACCES) |
3756 | goto mount_fail_check; | |
3757 | ||
1bfe73c2 | 3758 | goto remote_path_check; |
d00c28de | 3759 | } |
1bfe73c2 | 3760 | |
d82c2df5 | 3761 | /* tell server which Unix caps we support */ |
29e20f9c | 3762 | if (cap_unix(tcon->ses)) { |
d82c2df5 SF |
3763 | /* reset of caps checks mount to see if unix extensions |
3764 | disabled for just this mount */ | |
2c6292ae | 3765 | reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info); |
6848b733 SF |
3766 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && |
3767 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & | |
3768 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) { | |
3769 | rc = -EACCES; | |
3770 | goto mount_fail_check; | |
3771 | } | |
3772 | } else | |
d82c2df5 | 3773 | tcon->unix_ext = 0; /* server does not support them */ |
c18c842b | 3774 | |
af4281dc PS |
3775 | /* do not care if a following call succeed - informational */ |
3776 | if (!tcon->ipc && server->ops->qfs_tcon) | |
3777 | server->ops->qfs_tcon(xid, tcon); | |
6848b733 | 3778 | |
24985c53 PS |
3779 | cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info); |
3780 | cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info); | |
f7910cbd | 3781 | |
1bfe73c2 | 3782 | remote_path_check: |
c1508ca2 SF |
3783 | #ifdef CONFIG_CIFS_DFS_UPCALL |
3784 | /* | |
3785 | * Perform an unconditional check for whether there are DFS | |
3786 | * referrals for this path without prefix, to provide support | |
3787 | * for DFS referrals from w2k8 servers which don't seem to respond | |
3788 | * with PATH_NOT_COVERED to requests that include the prefix. | |
3789 | * Chase the referral if found, otherwise continue normally. | |
3790 | */ | |
3791 | if (referral_walks_count == 0) { | |
af4281dc PS |
3792 | int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, |
3793 | false); | |
c1508ca2 SF |
3794 | if (!refrc) { |
3795 | referral_walks_count++; | |
3796 | goto try_mount_again; | |
3797 | } | |
3798 | } | |
3799 | #endif | |
3800 | ||
f87d39d9 | 3801 | /* check if a whole path is not remote */ |
70945643 | 3802 | if (!rc && tcon) { |
68889f26 PS |
3803 | if (!server->ops->is_path_accessible) { |
3804 | rc = -ENOSYS; | |
3805 | goto mount_fail_check; | |
3806 | } | |
6d3ea7e4 SF |
3807 | /* |
3808 | * cifs_build_path_to_root works only when we have a valid tcon | |
3809 | */ | |
374402a2 SP |
3810 | full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon, |
3811 | tcon->Flags & SMB_SHARE_IS_IN_DFS); | |
e4cce94c IM |
3812 | if (full_path == NULL) { |
3813 | rc = -ENOMEM; | |
3814 | goto mount_fail_check; | |
3815 | } | |
68889f26 PS |
3816 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, |
3817 | full_path); | |
03ceace5 | 3818 | if (rc != 0 && rc != -EREMOTE) { |
e4cce94c IM |
3819 | kfree(full_path); |
3820 | goto mount_fail_check; | |
3821 | } | |
a6b5058f | 3822 | |
d171356f SP |
3823 | if (rc != -EREMOTE) { |
3824 | rc = cifs_are_all_path_components_accessible(server, | |
a6b5058f AA |
3825 | xid, tcon, cifs_sb, |
3826 | full_path); | |
d171356f SP |
3827 | if (rc != 0) { |
3828 | cifs_dbg(VFS, "cannot query dirs between root and final path, " | |
3829 | "enabling CIFS_MOUNT_USE_PREFIX_PATH\n"); | |
3830 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH; | |
3831 | rc = 0; | |
3832 | } | |
a6b5058f | 3833 | } |
e4cce94c IM |
3834 | kfree(full_path); |
3835 | } | |
3836 | ||
1bfe73c2 IM |
3837 | /* get referral if needed */ |
3838 | if (rc == -EREMOTE) { | |
d036f50f | 3839 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
3840 | if (referral_walks_count > MAX_NESTED_LINKS) { |
3841 | /* | |
3842 | * BB: when we implement proper loop detection, | |
3843 | * we will remove this check. But now we need it | |
3844 | * to prevent an indefinite loop if 'DFS tree' is | |
3845 | * misconfigured (i.e. has loops). | |
3846 | */ | |
3847 | rc = -ELOOP; | |
3848 | goto mount_fail_check; | |
3849 | } | |
1bfe73c2 | 3850 | |
af4281dc | 3851 | rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true); |
7b91e266 | 3852 | |
dd613945 | 3853 | if (!rc) { |
5c2503a8 | 3854 | referral_walks_count++; |
1bfe73c2 IM |
3855 | goto try_mount_again; |
3856 | } | |
dd613945 | 3857 | goto mount_fail_check; |
d036f50f SF |
3858 | #else /* No DFS support, return error on mount */ |
3859 | rc = -EOPNOTSUPP; | |
3860 | #endif | |
1bfe73c2 IM |
3861 | } |
3862 | ||
9d002df4 JL |
3863 | if (rc) |
3864 | goto mount_fail_check; | |
3865 | ||
3866 | /* now, hang the tcon off of the superblock */ | |
3867 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); | |
3868 | if (tlink == NULL) { | |
3869 | rc = -ENOMEM; | |
3870 | goto mount_fail_check; | |
3871 | } | |
3872 | ||
af4281dc | 3873 | tlink->tl_uid = ses->linux_uid; |
9d002df4 JL |
3874 | tlink->tl_tcon = tcon; |
3875 | tlink->tl_time = jiffies; | |
3876 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
3877 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3878 | ||
b647c35f | 3879 | cifs_sb->master_tlink = tlink; |
9d002df4 | 3880 | spin_lock(&cifs_sb->tlink_tree_lock); |
b647c35f | 3881 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
9d002df4 | 3882 | spin_unlock(&cifs_sb->tlink_tree_lock); |
413e661c | 3883 | |
da472fc8 | 3884 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
3885 | TLINK_IDLE_EXPIRE); |
3886 | ||
1bfe73c2 IM |
3887 | mount_fail_check: |
3888 | /* on error free sesinfo and tcon struct if needed */ | |
3889 | if (rc) { | |
1bfe73c2 | 3890 | /* If find_unc succeeded then rc == 0 so we can not end */ |
25985edc | 3891 | /* up accidentally freeing someone elses tcon struct */ |
1bfe73c2 IM |
3892 | if (tcon) |
3893 | cifs_put_tcon(tcon); | |
af4281dc PS |
3894 | else if (ses) |
3895 | cifs_put_smb_ses(ses); | |
1bfe73c2 | 3896 | else |
53e0e11e | 3897 | cifs_put_tcp_session(server, 0); |
1bfe73c2 IM |
3898 | } |
3899 | ||
70fe7dc0 | 3900 | out: |
6d5786a3 | 3901 | free_xid(xid); |
1da177e4 LT |
3902 | return rc; |
3903 | } | |
3904 | ||
8d1bca32 JL |
3905 | /* |
3906 | * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon | |
3907 | * pointer may be NULL. | |
3908 | */ | |
1da177e4 | 3909 | int |
2e6e02ab | 3910 | CIFSTCon(const unsigned int xid, struct cifs_ses *ses, |
96daf2b0 | 3911 | const char *tree, struct cifs_tcon *tcon, |
1da177e4 LT |
3912 | const struct nls_table *nls_codepage) |
3913 | { | |
3914 | struct smb_hdr *smb_buffer; | |
3915 | struct smb_hdr *smb_buffer_response; | |
3916 | TCONX_REQ *pSMB; | |
3917 | TCONX_RSP *pSMBr; | |
3918 | unsigned char *bcc_ptr; | |
3919 | int rc = 0; | |
690c522f JL |
3920 | int length; |
3921 | __u16 bytes_left, count; | |
1da177e4 LT |
3922 | |
3923 | if (ses == NULL) | |
3924 | return -EIO; | |
3925 | ||
3926 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 3927 | if (smb_buffer == NULL) |
1da177e4 | 3928 | return -ENOMEM; |
ca43e3be | 3929 | |
1da177e4 LT |
3930 | smb_buffer_response = smb_buffer; |
3931 | ||
3932 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
3933 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 | 3934 | |
88257360 | 3935 | smb_buffer->Mid = get_next_mid(ses->server); |
1da177e4 LT |
3936 | smb_buffer->Uid = ses->Suid; |
3937 | pSMB = (TCONX_REQ *) smb_buffer; | |
3938 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
3939 | ||
3940 | pSMB->AndXCommand = 0xFF; | |
3941 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 3942 | bcc_ptr = &pSMB->Password[0]; |
8d1bca32 | 3943 | if (!tcon || (ses->server->sec_mode & SECMODE_USER)) { |
eeac8047 | 3944 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 3945 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 3946 | bcc_ptr++; /* skip password */ |
7c7b25bc | 3947 | /* already aligned so no need to do it below */ |
eeac8047 | 3948 | } else { |
540b2e37 | 3949 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
3950 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
3951 | specified as required (when that support is added to | |
3952 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 3953 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
3954 | by Samba (not sure whether other servers allow |
3955 | NTLMv2 password here) */ | |
7c7b25bc | 3956 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 3957 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
3f618223 | 3958 | (ses->sectype == LANMAN)) |
d3ba50b1 | 3959 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
96daf2b0 | 3960 | ses->server->sec_mode & |
4e53a3fb JL |
3961 | SECMODE_PW_ENCRYPT ? true : false, |
3962 | bcc_ptr); | |
7c7b25bc SF |
3963 | else |
3964 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 | 3965 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
9ef5992e | 3966 | bcc_ptr, nls_codepage); |
f3a31a2b SF |
3967 | if (rc) { |
3968 | cifs_dbg(FYI, "%s Can't generate NTLM rsp. Error: %d\n", | |
3969 | __func__, rc); | |
3970 | cifs_buf_release(smb_buffer); | |
3971 | return rc; | |
3972 | } | |
eeac8047 | 3973 | |
540b2e37 | 3974 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 3975 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
3976 | /* must align unicode strings */ |
3977 | *bcc_ptr = 0; /* null byte password */ | |
3978 | bcc_ptr++; | |
3979 | } | |
eeac8047 | 3980 | } |
1da177e4 | 3981 | |
38d77c50 | 3982 | if (ses->server->sign) |
1da177e4 LT |
3983 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
3984 | ||
3985 | if (ses->capabilities & CAP_STATUS32) { | |
3986 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
3987 | } | |
3988 | if (ses->capabilities & CAP_DFS) { | |
3989 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
3990 | } | |
3991 | if (ses->capabilities & CAP_UNICODE) { | |
3992 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
3993 | length = | |
acbbb76a | 3994 | cifs_strtoUTF16((__le16 *) bcc_ptr, tree, |
50c2f753 | 3995 | 6 /* max utf8 char length in bytes */ * |
a878fb22 SF |
3996 | (/* server len*/ + 256 /* share len */), nls_codepage); |
3997 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
3998 | bcc_ptr += 2; /* skip trailing null */ |
3999 | } else { /* ASCII */ | |
1da177e4 LT |
4000 | strcpy(bcc_ptr, tree); |
4001 | bcc_ptr += strlen(tree) + 1; | |
4002 | } | |
4003 | strcpy(bcc_ptr, "?????"); | |
4004 | bcc_ptr += strlen("?????"); | |
4005 | bcc_ptr += 1; | |
4006 | count = bcc_ptr - &pSMB->Password[0]; | |
be8e3b00 SF |
4007 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
4008 | pSMB->hdr.smb_buf_length) + count); | |
1da177e4 LT |
4009 | pSMB->ByteCount = cpu_to_le16(count); |
4010 | ||
133672ef | 4011 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 4012 | 0); |
1da177e4 | 4013 | |
1da177e4 LT |
4014 | /* above now done in SendReceive */ |
4015 | if ((rc == 0) && (tcon != NULL)) { | |
0e0d2cf3 SF |
4016 | bool is_unicode; |
4017 | ||
1da177e4 | 4018 | tcon->tidStatus = CifsGood; |
3b795210 | 4019 | tcon->need_reconnect = false; |
1da177e4 LT |
4020 | tcon->tid = smb_buffer_response->Tid; |
4021 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 4022 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 4023 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
4024 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
4025 | is_unicode = true; | |
4026 | else | |
4027 | is_unicode = false; | |
4028 | ||
cc20c031 | 4029 | |
50c2f753 | 4030 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
4031 | if (length == 3) { |
4032 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
4033 | (bcc_ptr[2] == 'C')) { | |
f96637be | 4034 | cifs_dbg(FYI, "IPC connection\n"); |
7f8ed420 SF |
4035 | tcon->ipc = 1; |
4036 | } | |
4037 | } else if (length == 2) { | |
4038 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
4039 | /* the most common case */ | |
f96637be | 4040 | cifs_dbg(FYI, "disk share connection\n"); |
7f8ed420 SF |
4041 | } |
4042 | } | |
50c2f753 | 4043 | bcc_ptr += length + 1; |
cc20c031 | 4044 | bytes_left -= (length + 1); |
46b51d08 | 4045 | strlcpy(tcon->treeName, tree, sizeof(tcon->treeName)); |
cc20c031 JL |
4046 | |
4047 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 4048 | kfree(tcon->nativeFileSystem); |
acbbb76a | 4049 | tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr, |
0e0d2cf3 | 4050 | bytes_left, is_unicode, |
cc20c031 JL |
4051 | nls_codepage); |
4052 | ||
f96637be | 4053 | cifs_dbg(FYI, "nativeFileSystem=%s\n", tcon->nativeFileSystem); |
cc20c031 | 4054 | |
fb8c4b14 | 4055 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
4056 | (smb_buffer_response->WordCount == 7)) |
4057 | /* field is in same location */ | |
3979877e SF |
4058 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
4059 | else | |
4060 | tcon->Flags = 0; | |
f96637be | 4061 | cifs_dbg(FYI, "Tcon flags: 0x%x\n", tcon->Flags); |
1da177e4 | 4062 | } else if ((rc == 0) && tcon == NULL) { |
50c2f753 | 4063 | /* all we need to save for IPC$ connection */ |
1da177e4 LT |
4064 | ses->ipc_tid = smb_buffer_response->Tid; |
4065 | } | |
4066 | ||
a8a11d39 | 4067 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
4068 | return rc; |
4069 | } | |
4070 | ||
2e32cf5e AV |
4071 | static void delayed_free(struct rcu_head *p) |
4072 | { | |
4073 | struct cifs_sb_info *sbi = container_of(p, struct cifs_sb_info, rcu); | |
4074 | unload_nls(sbi->local_nls); | |
4075 | kfree(sbi); | |
4076 | } | |
4077 | ||
2a9b9951 AV |
4078 | void |
4079 | cifs_umount(struct cifs_sb_info *cifs_sb) | |
1da177e4 | 4080 | { |
b647c35f JL |
4081 | struct rb_root *root = &cifs_sb->tlink_tree; |
4082 | struct rb_node *node; | |
4083 | struct tcon_link *tlink; | |
9d002df4 | 4084 | |
2de970ff JL |
4085 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
4086 | ||
b647c35f JL |
4087 | spin_lock(&cifs_sb->tlink_tree_lock); |
4088 | while ((node = rb_first(root))) { | |
4089 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
4090 | cifs_get_tlink(tlink); | |
4091 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4092 | rb_erase(node, root); | |
1da177e4 | 4093 | |
b647c35f JL |
4094 | spin_unlock(&cifs_sb->tlink_tree_lock); |
4095 | cifs_put_tlink(tlink); | |
4096 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4097 | } | |
4098 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 4099 | |
d757d71b | 4100 | kfree(cifs_sb->mountdata); |
a6b5058f | 4101 | kfree(cifs_sb->prepath); |
2e32cf5e | 4102 | call_rcu(&cifs_sb->rcu, delayed_free); |
50c2f753 | 4103 | } |
1da177e4 | 4104 | |
286170aa PS |
4105 | int |
4106 | cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses) | |
1da177e4 LT |
4107 | { |
4108 | int rc = 0; | |
198b5682 | 4109 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 4110 | |
286170aa PS |
4111 | if (!server->ops->need_neg || !server->ops->negotiate) |
4112 | return -ENOSYS; | |
4113 | ||
198b5682 | 4114 | /* only send once per connect */ |
286170aa | 4115 | if (!server->ops->need_neg(server)) |
198b5682 JL |
4116 | return 0; |
4117 | ||
45275789 | 4118 | set_credits(server, 1); |
286170aa PS |
4119 | |
4120 | rc = server->ops->negotiate(xid, ses); | |
198b5682 JL |
4121 | if (rc == 0) { |
4122 | spin_lock(&GlobalMid_Lock); | |
7fdbaa1b | 4123 | if (server->tcpStatus == CifsNeedNegotiate) |
198b5682 JL |
4124 | server->tcpStatus = CifsGood; |
4125 | else | |
4126 | rc = -EHOSTDOWN; | |
4127 | spin_unlock(&GlobalMid_Lock); | |
198b5682 JL |
4128 | } |
4129 | ||
4130 | return rc; | |
4131 | } | |
4132 | ||
58c45c58 PS |
4133 | int |
4134 | cifs_setup_session(const unsigned int xid, struct cifs_ses *ses, | |
4135 | struct nls_table *nls_info) | |
198b5682 | 4136 | { |
58c45c58 | 4137 | int rc = -ENOSYS; |
198b5682 | 4138 | struct TCP_Server_Info *server = ses->server; |
26b994fa | 4139 | |
198b5682 | 4140 | ses->capabilities = server->capabilities; |
26b994fa | 4141 | if (linuxExtEnabled == 0) |
29e20f9c | 4142 | ses->capabilities &= (~server->vals->cap_unix); |
20418acd | 4143 | |
f96637be | 4144 | cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n", |
96daf2b0 | 4145 | server->sec_mode, server->capabilities, server->timeAdj); |
cb7691b6 | 4146 | |
58c45c58 PS |
4147 | if (server->ops->sess_setup) |
4148 | rc = server->ops->sess_setup(xid, ses, nls_info); | |
4149 | ||
d4e63bd6 | 4150 | if (rc) |
f96637be | 4151 | cifs_dbg(VFS, "Send error in SessSetup = %d\n", rc); |
21e73393 | 4152 | |
1da177e4 LT |
4153 | return rc; |
4154 | } | |
4155 | ||
8a8798a5 JL |
4156 | static int |
4157 | cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses) | |
4158 | { | |
3f618223 JL |
4159 | vol->sectype = ses->sectype; |
4160 | ||
4161 | /* krb5 is special, since we don't need username or pw */ | |
4162 | if (vol->sectype == Kerberos) | |
8a8798a5 | 4163 | return 0; |
8a8798a5 JL |
4164 | |
4165 | return cifs_set_cifscreds(vol, ses); | |
4166 | } | |
4167 | ||
96daf2b0 | 4168 | static struct cifs_tcon * |
6d4a0832 | 4169 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid) |
9d002df4 | 4170 | { |
8a8798a5 | 4171 | int rc; |
96daf2b0 SF |
4172 | struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); |
4173 | struct cifs_ses *ses; | |
4174 | struct cifs_tcon *tcon = NULL; | |
9d002df4 | 4175 | struct smb_vol *vol_info; |
9d002df4 JL |
4176 | |
4177 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
803ab977 DC |
4178 | if (vol_info == NULL) |
4179 | return ERR_PTR(-ENOMEM); | |
9d002df4 | 4180 | |
9d002df4 JL |
4181 | vol_info->local_nls = cifs_sb->local_nls; |
4182 | vol_info->linux_uid = fsuid; | |
4183 | vol_info->cred_uid = fsuid; | |
4184 | vol_info->UNC = master_tcon->treeName; | |
4185 | vol_info->retry = master_tcon->retry; | |
4186 | vol_info->nocase = master_tcon->nocase; | |
4187 | vol_info->local_lease = master_tcon->local_lease; | |
4188 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
28e11bd8 JL |
4189 | vol_info->sectype = master_tcon->ses->sectype; |
4190 | vol_info->sign = master_tcon->ses->sign; | |
9d002df4 | 4191 | |
8a8798a5 JL |
4192 | rc = cifs_set_vol_auth(vol_info, master_tcon->ses); |
4193 | if (rc) { | |
4194 | tcon = ERR_PTR(rc); | |
4195 | goto out; | |
4196 | } | |
9d002df4 JL |
4197 | |
4198 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 4199 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 4200 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 4201 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
4202 | |
4203 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
4204 | if (IS_ERR(ses)) { | |
96daf2b0 | 4205 | tcon = (struct cifs_tcon *)ses; |
53e0e11e | 4206 | cifs_put_tcp_session(master_tcon->ses->server, 0); |
9d002df4 JL |
4207 | goto out; |
4208 | } | |
4209 | ||
4210 | tcon = cifs_get_tcon(ses, vol_info); | |
4211 | if (IS_ERR(tcon)) { | |
4212 | cifs_put_smb_ses(ses); | |
4213 | goto out; | |
4214 | } | |
4215 | ||
29e20f9c | 4216 | if (cap_unix(ses)) |
9d002df4 JL |
4217 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); |
4218 | out: | |
8a8798a5 JL |
4219 | kfree(vol_info->username); |
4220 | kfree(vol_info->password); | |
9d002df4 JL |
4221 | kfree(vol_info); |
4222 | ||
4223 | return tcon; | |
4224 | } | |
4225 | ||
96daf2b0 | 4226 | struct cifs_tcon * |
9d002df4 JL |
4227 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) |
4228 | { | |
4229 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
4230 | } | |
4231 | ||
b647c35f JL |
4232 | /* find and return a tlink with given uid */ |
4233 | static struct tcon_link * | |
6d4a0832 | 4234 | tlink_rb_search(struct rb_root *root, kuid_t uid) |
b647c35f JL |
4235 | { |
4236 | struct rb_node *node = root->rb_node; | |
4237 | struct tcon_link *tlink; | |
4238 | ||
4239 | while (node) { | |
4240 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
4241 | ||
6d4a0832 | 4242 | if (uid_gt(tlink->tl_uid, uid)) |
b647c35f | 4243 | node = node->rb_left; |
6d4a0832 | 4244 | else if (uid_lt(tlink->tl_uid, uid)) |
b647c35f JL |
4245 | node = node->rb_right; |
4246 | else | |
4247 | return tlink; | |
4248 | } | |
4249 | return NULL; | |
4250 | } | |
4251 | ||
4252 | /* insert a tcon_link into the tree */ | |
4253 | static void | |
4254 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
4255 | { | |
4256 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
4257 | struct tcon_link *tlink; | |
4258 | ||
4259 | while (*new) { | |
4260 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
4261 | parent = *new; | |
4262 | ||
6d4a0832 | 4263 | if (uid_gt(tlink->tl_uid, new_tlink->tl_uid)) |
b647c35f JL |
4264 | new = &((*new)->rb_left); |
4265 | else | |
4266 | new = &((*new)->rb_right); | |
4267 | } | |
4268 | ||
4269 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
4270 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
4271 | } | |
4272 | ||
9d002df4 JL |
4273 | /* |
4274 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
4275 | * current task. | |
4276 | * | |
4277 | * If the superblock doesn't refer to a multiuser mount, then just return | |
4278 | * the master tcon for the mount. | |
4279 | * | |
6ef933a3 | 4280 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
4281 | * exists, then check to see if it's pending construction. If it is then wait |
4282 | * for construction to complete. Once it's no longer pending, check to see if | |
4283 | * it failed and either return an error or retry construction, depending on | |
4284 | * the timeout. | |
4285 | * | |
4286 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
4287 | * try to construct a new one. | |
4288 | */ | |
4289 | struct tcon_link * | |
4290 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
4291 | { | |
4292 | int ret; | |
6d4a0832 | 4293 | kuid_t fsuid = current_fsuid(); |
9d002df4 JL |
4294 | struct tcon_link *tlink, *newtlink; |
4295 | ||
4296 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
4297 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
4298 | ||
4299 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 4300 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4301 | if (tlink) |
4302 | cifs_get_tlink(tlink); | |
4303 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4304 | ||
4305 | if (tlink == NULL) { | |
4306 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
4307 | if (newtlink == NULL) | |
4308 | return ERR_PTR(-ENOMEM); | |
b647c35f | 4309 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
4310 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
4311 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
4312 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
4313 | cifs_get_tlink(newtlink); | |
4314 | ||
9d002df4 JL |
4315 | spin_lock(&cifs_sb->tlink_tree_lock); |
4316 | /* was one inserted after previous search? */ | |
b647c35f | 4317 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4318 | if (tlink) { |
4319 | cifs_get_tlink(tlink); | |
4320 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4321 | kfree(newtlink); |
4322 | goto wait_for_construction; | |
4323 | } | |
9d002df4 | 4324 | tlink = newtlink; |
b647c35f JL |
4325 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
4326 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4327 | } else { |
4328 | wait_for_construction: | |
4329 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
9d002df4 JL |
4330 | TASK_INTERRUPTIBLE); |
4331 | if (ret) { | |
4332 | cifs_put_tlink(tlink); | |
74316201 | 4333 | return ERR_PTR(-ERESTARTSYS); |
9d002df4 JL |
4334 | } |
4335 | ||
4336 | /* if it's good, return it */ | |
4337 | if (!IS_ERR(tlink->tl_tcon)) | |
4338 | return tlink; | |
4339 | ||
4340 | /* return error if we tried this already recently */ | |
4341 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
4342 | cifs_put_tlink(tlink); | |
4343 | return ERR_PTR(-EACCES); | |
4344 | } | |
4345 | ||
4346 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
4347 | goto wait_for_construction; | |
4348 | } | |
4349 | ||
4350 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
4351 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
4352 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
4353 | ||
4354 | if (IS_ERR(tlink->tl_tcon)) { | |
4355 | cifs_put_tlink(tlink); | |
4356 | return ERR_PTR(-EACCES); | |
4357 | } | |
4358 | ||
4359 | return tlink; | |
4360 | } | |
2de970ff JL |
4361 | |
4362 | /* | |
4363 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
4364 | * out tcons. | |
4365 | */ | |
4366 | static void | |
4367 | cifs_prune_tlinks(struct work_struct *work) | |
4368 | { | |
4369 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
4370 | prune_tlinks.work); | |
b647c35f JL |
4371 | struct rb_root *root = &cifs_sb->tlink_tree; |
4372 | struct rb_node *node = rb_first(root); | |
4373 | struct rb_node *tmp; | |
4374 | struct tcon_link *tlink; | |
2de970ff | 4375 | |
b647c35f JL |
4376 | /* |
4377 | * Because we drop the spinlock in the loop in order to put the tlink | |
4378 | * it's not guarded against removal of links from the tree. The only | |
4379 | * places that remove entries from the tree are this function and | |
4380 | * umounts. Because this function is non-reentrant and is canceled | |
4381 | * before umount can proceed, this is safe. | |
4382 | */ | |
4383 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4384 | node = rb_first(root); | |
4385 | while (node != NULL) { | |
4386 | tmp = node; | |
4387 | node = rb_next(tmp); | |
4388 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
4389 | ||
4390 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
4391 | atomic_read(&tlink->tl_count) != 0 || | |
4392 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
4393 | continue; | |
2de970ff | 4394 | |
b647c35f JL |
4395 | cifs_get_tlink(tlink); |
4396 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4397 | rb_erase(tmp, root); | |
4398 | ||
4399 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4400 | cifs_put_tlink(tlink); | |
4401 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4402 | } | |
4403 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff | 4404 | |
da472fc8 | 4405 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
4406 | TLINK_IDLE_EXPIRE); |
4407 | } |