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1da177e4 LT |
1 | /* |
2 | * fs/cifs/connect.c | |
3 | * | |
1080ef75 | 4 | * Copyright (C) International Business Machines Corp., 2002,2011 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
fb8c4b14 | 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
1da177e4 LT |
20 | */ |
21 | #include <linux/fs.h> | |
22 | #include <linux/net.h> | |
23 | #include <linux/string.h> | |
24 | #include <linux/list.h> | |
25 | #include <linux/wait.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
1da177e4 LT |
27 | #include <linux/pagemap.h> |
28 | #include <linux/ctype.h> | |
29 | #include <linux/utsname.h> | |
30 | #include <linux/mempool.h> | |
b8643e1b | 31 | #include <linux/delay.h> |
f191401f | 32 | #include <linux/completion.h> |
aaf737ad | 33 | #include <linux/kthread.h> |
0ae0efad | 34 | #include <linux/pagevec.h> |
7dfb7103 | 35 | #include <linux/freezer.h> |
5c2503a8 | 36 | #include <linux/namei.h> |
7c0f6ba6 | 37 | #include <linux/uaccess.h> |
1da177e4 | 38 | #include <asm/processor.h> |
50b64e3b | 39 | #include <linux/inet.h> |
143cb494 | 40 | #include <linux/module.h> |
8a8798a5 | 41 | #include <keys/user-type.h> |
0e2bedaa | 42 | #include <net/ipv6.h> |
8830d7e0 | 43 | #include <linux/parser.h> |
2f8b5444 | 44 | #include <linux/bvec.h> |
8830d7e0 | 45 | |
1da177e4 LT |
46 | #include "cifspdu.h" |
47 | #include "cifsglob.h" | |
48 | #include "cifsproto.h" | |
49 | #include "cifs_unicode.h" | |
50 | #include "cifs_debug.h" | |
51 | #include "cifs_fs_sb.h" | |
52 | #include "ntlmssp.h" | |
53 | #include "nterr.h" | |
54 | #include "rfc1002pdu.h" | |
488f1d2d | 55 | #include "fscache.h" |
53e0e11e PS |
56 | #ifdef CONFIG_CIFS_SMB2 |
57 | #include "smb2proto.h" | |
58 | #endif | |
1da177e4 LT |
59 | |
60 | #define CIFS_PORT 445 | |
61 | #define RFC1001_PORT 139 | |
62 | ||
1da177e4 LT |
63 | extern mempool_t *cifs_req_poolp; |
64 | ||
2de970ff | 65 | /* FIXME: should these be tunable? */ |
9d002df4 | 66 | #define TLINK_ERROR_EXPIRE (1 * HZ) |
2de970ff | 67 | #define TLINK_IDLE_EXPIRE (600 * HZ) |
9d002df4 | 68 | |
8830d7e0 | 69 | enum { |
8830d7e0 SP |
70 | /* Mount options that take no arguments */ |
71 | Opt_user_xattr, Opt_nouser_xattr, | |
72 | Opt_forceuid, Opt_noforceuid, | |
72bd481f | 73 | Opt_forcegid, Opt_noforcegid, |
8830d7e0 SP |
74 | Opt_noblocksend, Opt_noautotune, |
75 | Opt_hard, Opt_soft, Opt_perm, Opt_noperm, | |
2baa2682 | 76 | Opt_mapposix, Opt_nomapposix, |
8830d7e0 SP |
77 | Opt_mapchars, Opt_nomapchars, Opt_sfu, |
78 | Opt_nosfu, Opt_nodfs, Opt_posixpaths, | |
79 | Opt_noposixpaths, Opt_nounix, | |
80 | Opt_nocase, | |
81 | Opt_brl, Opt_nobrl, | |
95932655 | 82 | Opt_forcemandatorylock, Opt_setuidfromacl, Opt_setuids, |
8830d7e0 SP |
83 | Opt_nosetuids, Opt_dynperm, Opt_nodynperm, |
84 | Opt_nohard, Opt_nosoft, | |
85 | Opt_nointr, Opt_intr, | |
86 | Opt_nostrictsync, Opt_strictsync, | |
87 | Opt_serverino, Opt_noserverino, | |
88 | Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl, | |
89 | Opt_acl, Opt_noacl, Opt_locallease, | |
1b359204 | 90 | Opt_sign, Opt_seal, Opt_noac, |
8830d7e0 | 91 | Opt_fsc, Opt_mfsymlinks, |
a0b3df5c | 92 | Opt_multiuser, Opt_sloppy, Opt_nosharesock, |
b2a30774 | 93 | Opt_persistent, Opt_nopersistent, |
592fafe6 | 94 | Opt_resilient, Opt_noresilient, |
39566443 | 95 | Opt_domainauto, |
8830d7e0 SP |
96 | |
97 | /* Mount options which take numeric value */ | |
98 | Opt_backupuid, Opt_backupgid, Opt_uid, | |
99 | Opt_cruid, Opt_gid, Opt_file_mode, | |
100 | Opt_dirmode, Opt_port, | |
101 | Opt_rsize, Opt_wsize, Opt_actimeo, | |
141891f4 | 102 | Opt_echo_interval, Opt_max_credits, |
8b217fe7 | 103 | Opt_snapshot, |
8830d7e0 SP |
104 | |
105 | /* Mount options which take string value */ | |
106 | Opt_user, Opt_pass, Opt_ip, | |
73a999fa | 107 | Opt_domain, Opt_srcaddr, Opt_iocharset, |
8830d7e0 | 108 | Opt_netbiosname, Opt_servern, |
23db65f5 | 109 | Opt_ver, Opt_vers, Opt_sec, Opt_cache, |
8830d7e0 SP |
110 | |
111 | /* Mount options to be ignored */ | |
112 | Opt_ignore, | |
113 | ||
114 | /* Options which could be blank */ | |
115 | Opt_blank_pass, | |
4fe9e963 SP |
116 | Opt_blank_user, |
117 | Opt_blank_ip, | |
8830d7e0 SP |
118 | |
119 | Opt_err | |
120 | }; | |
121 | ||
122 | static const match_table_t cifs_mount_option_tokens = { | |
123 | ||
124 | { Opt_user_xattr, "user_xattr" }, | |
125 | { Opt_nouser_xattr, "nouser_xattr" }, | |
126 | { Opt_forceuid, "forceuid" }, | |
127 | { Opt_noforceuid, "noforceuid" }, | |
72bd481f JL |
128 | { Opt_forcegid, "forcegid" }, |
129 | { Opt_noforcegid, "noforcegid" }, | |
8830d7e0 SP |
130 | { Opt_noblocksend, "noblocksend" }, |
131 | { Opt_noautotune, "noautotune" }, | |
132 | { Opt_hard, "hard" }, | |
133 | { Opt_soft, "soft" }, | |
134 | { Opt_perm, "perm" }, | |
135 | { Opt_noperm, "noperm" }, | |
2baa2682 | 136 | { Opt_mapchars, "mapchars" }, /* SFU style */ |
8830d7e0 | 137 | { Opt_nomapchars, "nomapchars" }, |
2baa2682 SF |
138 | { Opt_mapposix, "mapposix" }, /* SFM style */ |
139 | { Opt_nomapposix, "nomapposix" }, | |
8830d7e0 SP |
140 | { Opt_sfu, "sfu" }, |
141 | { Opt_nosfu, "nosfu" }, | |
142 | { Opt_nodfs, "nodfs" }, | |
143 | { Opt_posixpaths, "posixpaths" }, | |
144 | { Opt_noposixpaths, "noposixpaths" }, | |
145 | { Opt_nounix, "nounix" }, | |
146 | { Opt_nounix, "nolinux" }, | |
147 | { Opt_nocase, "nocase" }, | |
148 | { Opt_nocase, "ignorecase" }, | |
149 | { Opt_brl, "brl" }, | |
150 | { Opt_nobrl, "nobrl" }, | |
151 | { Opt_nobrl, "nolock" }, | |
152 | { Opt_forcemandatorylock, "forcemandatorylock" }, | |
5cfdddcf | 153 | { Opt_forcemandatorylock, "forcemand" }, |
8830d7e0 SP |
154 | { Opt_setuids, "setuids" }, |
155 | { Opt_nosetuids, "nosetuids" }, | |
95932655 | 156 | { Opt_setuidfromacl, "idsfromsid" }, |
8830d7e0 SP |
157 | { Opt_dynperm, "dynperm" }, |
158 | { Opt_nodynperm, "nodynperm" }, | |
159 | { Opt_nohard, "nohard" }, | |
160 | { Opt_nosoft, "nosoft" }, | |
161 | { Opt_nointr, "nointr" }, | |
162 | { Opt_intr, "intr" }, | |
163 | { Opt_nostrictsync, "nostrictsync" }, | |
164 | { Opt_strictsync, "strictsync" }, | |
165 | { Opt_serverino, "serverino" }, | |
166 | { Opt_noserverino, "noserverino" }, | |
167 | { Opt_rwpidforward, "rwpidforward" }, | |
168 | { Opt_cifsacl, "cifsacl" }, | |
169 | { Opt_nocifsacl, "nocifsacl" }, | |
170 | { Opt_acl, "acl" }, | |
171 | { Opt_noacl, "noacl" }, | |
172 | { Opt_locallease, "locallease" }, | |
173 | { Opt_sign, "sign" }, | |
174 | { Opt_seal, "seal" }, | |
8830d7e0 SP |
175 | { Opt_noac, "noac" }, |
176 | { Opt_fsc, "fsc" }, | |
177 | { Opt_mfsymlinks, "mfsymlinks" }, | |
178 | { Opt_multiuser, "multiuser" }, | |
d8162558 | 179 | { Opt_sloppy, "sloppy" }, |
a0b3df5c | 180 | { Opt_nosharesock, "nosharesock" }, |
b2a30774 SF |
181 | { Opt_persistent, "persistenthandles"}, |
182 | { Opt_nopersistent, "nopersistenthandles"}, | |
592fafe6 SF |
183 | { Opt_resilient, "resilienthandles"}, |
184 | { Opt_noresilient, "noresilienthandles"}, | |
39566443 | 185 | { Opt_domainauto, "domainauto"}, |
8830d7e0 SP |
186 | |
187 | { Opt_backupuid, "backupuid=%s" }, | |
188 | { Opt_backupgid, "backupgid=%s" }, | |
189 | { Opt_uid, "uid=%s" }, | |
190 | { Opt_cruid, "cruid=%s" }, | |
191 | { Opt_gid, "gid=%s" }, | |
192 | { Opt_file_mode, "file_mode=%s" }, | |
193 | { Opt_dirmode, "dirmode=%s" }, | |
194 | { Opt_dirmode, "dir_mode=%s" }, | |
195 | { Opt_port, "port=%s" }, | |
196 | { Opt_rsize, "rsize=%s" }, | |
197 | { Opt_wsize, "wsize=%s" }, | |
198 | { Opt_actimeo, "actimeo=%s" }, | |
adfeb3e0 | 199 | { Opt_echo_interval, "echo_interval=%s" }, |
141891f4 | 200 | { Opt_max_credits, "max_credits=%s" }, |
8b217fe7 | 201 | { Opt_snapshot, "snapshot=%s" }, |
8830d7e0 | 202 | |
4fe9e963 SP |
203 | { Opt_blank_user, "user=" }, |
204 | { Opt_blank_user, "username=" }, | |
8830d7e0 SP |
205 | { Opt_user, "user=%s" }, |
206 | { Opt_user, "username=%s" }, | |
207 | { Opt_blank_pass, "pass=" }, | |
3c15b4cf | 208 | { Opt_blank_pass, "password=" }, |
8830d7e0 SP |
209 | { Opt_pass, "pass=%s" }, |
210 | { Opt_pass, "password=%s" }, | |
4fe9e963 SP |
211 | { Opt_blank_ip, "ip=" }, |
212 | { Opt_blank_ip, "addr=" }, | |
8830d7e0 SP |
213 | { Opt_ip, "ip=%s" }, |
214 | { Opt_ip, "addr=%s" }, | |
73a999fa JL |
215 | { Opt_ignore, "unc=%s" }, |
216 | { Opt_ignore, "target=%s" }, | |
217 | { Opt_ignore, "path=%s" }, | |
8830d7e0 SP |
218 | { Opt_domain, "dom=%s" }, |
219 | { Opt_domain, "domain=%s" }, | |
220 | { Opt_domain, "workgroup=%s" }, | |
221 | { Opt_srcaddr, "srcaddr=%s" }, | |
73a999fa | 222 | { Opt_ignore, "prefixpath=%s" }, |
8830d7e0 | 223 | { Opt_iocharset, "iocharset=%s" }, |
8830d7e0 SP |
224 | { Opt_netbiosname, "netbiosname=%s" }, |
225 | { Opt_servern, "servern=%s" }, | |
226 | { Opt_ver, "ver=%s" }, | |
23db65f5 | 227 | { Opt_vers, "vers=%s" }, |
8830d7e0 | 228 | { Opt_sec, "sec=%s" }, |
15b6a473 | 229 | { Opt_cache, "cache=%s" }, |
8830d7e0 SP |
230 | |
231 | { Opt_ignore, "cred" }, | |
232 | { Opt_ignore, "credentials" }, | |
a557b976 JL |
233 | { Opt_ignore, "cred=%s" }, |
234 | { Opt_ignore, "credentials=%s" }, | |
8830d7e0 SP |
235 | { Opt_ignore, "guest" }, |
236 | { Opt_ignore, "rw" }, | |
237 | { Opt_ignore, "ro" }, | |
238 | { Opt_ignore, "suid" }, | |
239 | { Opt_ignore, "nosuid" }, | |
240 | { Opt_ignore, "exec" }, | |
241 | { Opt_ignore, "noexec" }, | |
242 | { Opt_ignore, "nodev" }, | |
243 | { Opt_ignore, "noauto" }, | |
244 | { Opt_ignore, "dev" }, | |
245 | { Opt_ignore, "mand" }, | |
246 | { Opt_ignore, "nomand" }, | |
247 | { Opt_ignore, "_netdev" }, | |
248 | ||
249 | { Opt_err, NULL } | |
250 | }; | |
251 | ||
252 | enum { | |
253 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
254 | Opt_sec_ntlmsspi, Opt_sec_ntlmssp, | |
7659624f JL |
255 | Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2, |
256 | Opt_sec_ntlmv2i, Opt_sec_lanman, | |
8830d7e0 SP |
257 | Opt_sec_none, |
258 | ||
259 | Opt_sec_err | |
260 | }; | |
261 | ||
262 | static const match_table_t cifs_secflavor_tokens = { | |
263 | { Opt_sec_krb5, "krb5" }, | |
264 | { Opt_sec_krb5i, "krb5i" }, | |
265 | { Opt_sec_krb5p, "krb5p" }, | |
266 | { Opt_sec_ntlmsspi, "ntlmsspi" }, | |
267 | { Opt_sec_ntlmssp, "ntlmssp" }, | |
268 | { Opt_ntlm, "ntlm" }, | |
269 | { Opt_sec_ntlmi, "ntlmi" }, | |
7659624f JL |
270 | { Opt_sec_ntlmv2, "nontlm" }, |
271 | { Opt_sec_ntlmv2, "ntlmv2" }, | |
8830d7e0 | 272 | { Opt_sec_ntlmv2i, "ntlmv2i" }, |
8830d7e0 SP |
273 | { Opt_sec_lanman, "lanman" }, |
274 | { Opt_sec_none, "none" }, | |
275 | ||
276 | { Opt_sec_err, NULL } | |
277 | }; | |
278 | ||
15b6a473 JL |
279 | /* cache flavors */ |
280 | enum { | |
281 | Opt_cache_loose, | |
282 | Opt_cache_strict, | |
283 | Opt_cache_none, | |
284 | Opt_cache_err | |
285 | }; | |
286 | ||
287 | static const match_table_t cifs_cacheflavor_tokens = { | |
288 | { Opt_cache_loose, "loose" }, | |
289 | { Opt_cache_strict, "strict" }, | |
290 | { Opt_cache_none, "none" }, | |
291 | { Opt_cache_err, NULL } | |
292 | }; | |
293 | ||
23db65f5 JL |
294 | static const match_table_t cifs_smb_version_tokens = { |
295 | { Smb_1, SMB1_VERSION_STRING }, | |
dd446b16 | 296 | { Smb_20, SMB20_VERSION_STRING}, |
1080ef75 | 297 | { Smb_21, SMB21_VERSION_STRING }, |
e4aa25e7 | 298 | { Smb_30, SMB30_VERSION_STRING }, |
20b6d8b4 | 299 | { Smb_302, SMB302_VERSION_STRING }, |
5f7fbf73 SF |
300 | #ifdef CONFIG_CIFS_SMB311 |
301 | { Smb_311, SMB311_VERSION_STRING }, | |
aab1893d | 302 | { Smb_311, ALT_SMB311_VERSION_STRING }, |
5f7fbf73 SF |
303 | #endif /* SMB311 */ |
304 | { Smb_version_err, NULL } | |
23db65f5 JL |
305 | }; |
306 | ||
a9f1b85e PS |
307 | static int ip_connect(struct TCP_Server_Info *server); |
308 | static int generic_ip_connect(struct TCP_Server_Info *server); | |
b647c35f | 309 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
2de970ff | 310 | static void cifs_prune_tlinks(struct work_struct *work); |
b9bce2e9 JL |
311 | static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
312 | const char *devname); | |
1da177e4 | 313 | |
d5c5605c JL |
314 | /* |
315 | * cifs tcp session reconnection | |
316 | * | |
317 | * mark tcp session as reconnecting so temporarily locked | |
318 | * mark all smb sessions as reconnecting for tcp session | |
319 | * reconnect tcp session | |
320 | * wake up waiters on reconnection? - (not needed currently) | |
321 | */ | |
28ea5290 | 322 | int |
1da177e4 LT |
323 | cifs_reconnect(struct TCP_Server_Info *server) |
324 | { | |
325 | int rc = 0; | |
f1987b44 | 326 | struct list_head *tmp, *tmp2; |
96daf2b0 SF |
327 | struct cifs_ses *ses; |
328 | struct cifs_tcon *tcon; | |
fb8c4b14 | 329 | struct mid_q_entry *mid_entry; |
3c1105df | 330 | struct list_head retry_list; |
50c2f753 | 331 | |
1da177e4 | 332 | spin_lock(&GlobalMid_Lock); |
469ee614 | 333 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 334 | /* the demux thread will exit normally |
1da177e4 LT |
335 | next time through the loop */ |
336 | spin_unlock(&GlobalMid_Lock); | |
337 | return rc; | |
338 | } else | |
339 | server->tcpStatus = CifsNeedReconnect; | |
340 | spin_unlock(&GlobalMid_Lock); | |
341 | server->maxBuf = 0; | |
aa24d1e9 PS |
342 | #ifdef CONFIG_CIFS_SMB2 |
343 | server->max_read = 0; | |
344 | #endif | |
1da177e4 | 345 | |
f96637be | 346 | cifs_dbg(FYI, "Reconnecting tcp session\n"); |
1da177e4 LT |
347 | |
348 | /* before reconnecting the tcp session, mark the smb session (uid) | |
349 | and the tid bad so they are not used until reconnected */ | |
f96637be JP |
350 | cifs_dbg(FYI, "%s: marking sessions and tcons for reconnect\n", |
351 | __func__); | |
3f9bcca7 | 352 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 353 | list_for_each(tmp, &server->smb_ses_list) { |
96daf2b0 | 354 | ses = list_entry(tmp, struct cifs_ses, smb_ses_list); |
14fbf50d JL |
355 | ses->need_reconnect = true; |
356 | ses->ipc_tid = 0; | |
f1987b44 | 357 | list_for_each(tmp2, &ses->tcon_list) { |
96daf2b0 | 358 | tcon = list_entry(tmp2, struct cifs_tcon, tcon_list); |
3b795210 | 359 | tcon->need_reconnect = true; |
1da177e4 | 360 | } |
1da177e4 | 361 | } |
3f9bcca7 | 362 | spin_unlock(&cifs_tcp_ses_lock); |
2b84a36c | 363 | |
1da177e4 | 364 | /* do not want to be sending data on a socket we are freeing */ |
f96637be | 365 | cifs_dbg(FYI, "%s: tearing down socket\n", __func__); |
72ca545b | 366 | mutex_lock(&server->srv_mutex); |
fb8c4b14 | 367 | if (server->ssocket) { |
f96637be JP |
368 | cifs_dbg(FYI, "State: 0x%x Flags: 0x%lx\n", |
369 | server->ssocket->state, server->ssocket->flags); | |
91cf45f0 | 370 | kernel_sock_shutdown(server->ssocket, SHUT_WR); |
f96637be JP |
371 | cifs_dbg(FYI, "Post shutdown state: 0x%x Flags: 0x%lx\n", |
372 | server->ssocket->state, server->ssocket->flags); | |
1da177e4 LT |
373 | sock_release(server->ssocket); |
374 | server->ssocket = NULL; | |
375 | } | |
5d0d2882 SP |
376 | server->sequence_number = 0; |
377 | server->session_estab = false; | |
21e73393 SP |
378 | kfree(server->session_key.response); |
379 | server->session_key.response = NULL; | |
380 | server->session_key.len = 0; | |
fda35943 | 381 | server->lstrp = jiffies; |
1da177e4 | 382 | |
2b84a36c | 383 | /* mark submitted MIDs for retry and issue callback */ |
3c1105df | 384 | INIT_LIST_HEAD(&retry_list); |
f96637be | 385 | cifs_dbg(FYI, "%s: moving mids to private list\n", __func__); |
1da177e4 | 386 | spin_lock(&GlobalMid_Lock); |
2b84a36c JL |
387 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
388 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 PS |
389 | if (mid_entry->mid_state == MID_REQUEST_SUBMITTED) |
390 | mid_entry->mid_state = MID_RETRY_NEEDED; | |
3c1105df JL |
391 | list_move(&mid_entry->qhead, &retry_list); |
392 | } | |
393 | spin_unlock(&GlobalMid_Lock); | |
820962dc | 394 | mutex_unlock(&server->srv_mutex); |
3c1105df | 395 | |
f96637be | 396 | cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__); |
3c1105df JL |
397 | list_for_each_safe(tmp, tmp2, &retry_list) { |
398 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
2b84a36c JL |
399 | list_del_init(&mid_entry->qhead); |
400 | mid_entry->callback(mid_entry); | |
1da177e4 | 401 | } |
1da177e4 | 402 | |
7fdbaa1b | 403 | do { |
6c3d8909 | 404 | try_to_freeze(); |
a9f1b85e PS |
405 | |
406 | /* we should try only the port we connected to before */ | |
73e216a8 | 407 | mutex_lock(&server->srv_mutex); |
a9f1b85e | 408 | rc = generic_ip_connect(server); |
fb8c4b14 | 409 | if (rc) { |
f96637be | 410 | cifs_dbg(FYI, "reconnect error %d\n", rc); |
4afe260b | 411 | mutex_unlock(&server->srv_mutex); |
0cb766ae | 412 | msleep(3000); |
1da177e4 LT |
413 | } else { |
414 | atomic_inc(&tcpSesReconnectCount); | |
415 | spin_lock(&GlobalMid_Lock); | |
469ee614 | 416 | if (server->tcpStatus != CifsExiting) |
fd88ce93 | 417 | server->tcpStatus = CifsNeedNegotiate; |
fb8c4b14 | 418 | spin_unlock(&GlobalMid_Lock); |
4afe260b | 419 | mutex_unlock(&server->srv_mutex); |
1da177e4 | 420 | } |
7fdbaa1b | 421 | } while (server->tcpStatus == CifsNeedReconnect); |
2b84a36c | 422 | |
b8c60012 SP |
423 | if (server->tcpStatus == CifsNeedNegotiate) |
424 | mod_delayed_work(cifsiod_wq, &server->echo, 0); | |
425 | ||
1da177e4 LT |
426 | return rc; |
427 | } | |
428 | ||
c74093b6 JL |
429 | static void |
430 | cifs_echo_request(struct work_struct *work) | |
431 | { | |
432 | int rc; | |
433 | struct TCP_Server_Info *server = container_of(work, | |
434 | struct TCP_Server_Info, echo.work); | |
b8c60012 SP |
435 | unsigned long echo_interval; |
436 | ||
437 | /* | |
438 | * If we need to renegotiate, set echo interval to zero to | |
439 | * immediately call echo service where we can renegotiate. | |
440 | */ | |
441 | if (server->tcpStatus == CifsNeedNegotiate) | |
442 | echo_interval = 0; | |
443 | else | |
444 | echo_interval = server->echo_interval; | |
c74093b6 | 445 | |
247ec9b4 | 446 | /* |
b8c60012 SP |
447 | * We cannot send an echo if it is disabled. |
448 | * Also, no need to ping if we got a response recently. | |
247ec9b4 | 449 | */ |
4fcd1813 SF |
450 | |
451 | if (server->tcpStatus == CifsNeedReconnect || | |
b8c60012 SP |
452 | server->tcpStatus == CifsExiting || |
453 | server->tcpStatus == CifsNew || | |
f6d76178 | 454 | (server->ops->can_echo && !server->ops->can_echo(server)) || |
adfeb3e0 | 455 | time_before(jiffies, server->lstrp + echo_interval - HZ)) |
c74093b6 JL |
456 | goto requeue_echo; |
457 | ||
f6d76178 | 458 | rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS; |
c74093b6 | 459 | if (rc) |
f96637be JP |
460 | cifs_dbg(FYI, "Unable to send echo request to server: %s\n", |
461 | server->hostname); | |
c74093b6 JL |
462 | |
463 | requeue_echo: | |
b8c60012 | 464 | queue_delayed_work(cifsiod_wq, &server->echo, server->echo_interval); |
c74093b6 JL |
465 | } |
466 | ||
3d9c2472 | 467 | static bool |
2a37ef94 | 468 | allocate_buffers(struct TCP_Server_Info *server) |
3d9c2472 | 469 | { |
2a37ef94 JL |
470 | if (!server->bigbuf) { |
471 | server->bigbuf = (char *)cifs_buf_get(); | |
472 | if (!server->bigbuf) { | |
f96637be | 473 | cifs_dbg(VFS, "No memory for large SMB response\n"); |
3d9c2472 PS |
474 | msleep(3000); |
475 | /* retry will check if exiting */ | |
476 | return false; | |
477 | } | |
2a37ef94 | 478 | } else if (server->large_buf) { |
3d9c2472 | 479 | /* we are reusing a dirty large buf, clear its start */ |
1887f601 | 480 | memset(server->bigbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
481 | } |
482 | ||
2a37ef94 JL |
483 | if (!server->smallbuf) { |
484 | server->smallbuf = (char *)cifs_small_buf_get(); | |
485 | if (!server->smallbuf) { | |
f96637be | 486 | cifs_dbg(VFS, "No memory for SMB response\n"); |
3d9c2472 PS |
487 | msleep(1000); |
488 | /* retry will check if exiting */ | |
489 | return false; | |
490 | } | |
491 | /* beginning of smb buffer is cleared in our buf_get */ | |
492 | } else { | |
493 | /* if existing small buf clear beginning */ | |
1887f601 | 494 | memset(server->smallbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
495 | } |
496 | ||
3d9c2472 PS |
497 | return true; |
498 | } | |
499 | ||
ba749e6d JL |
500 | static bool |
501 | server_unresponsive(struct TCP_Server_Info *server) | |
502 | { | |
6dae51a5 PS |
503 | /* |
504 | * We need to wait 2 echo intervals to make sure we handle such | |
505 | * situations right: | |
506 | * 1s client sends a normal SMB request | |
507 | * 2s client gets a response | |
508 | * 30s echo workqueue job pops, and decides we got a response recently | |
509 | * and don't need to send another | |
510 | * ... | |
511 | * 65s kernel_recvmsg times out, and we see that we haven't gotten | |
512 | * a response in >60s. | |
513 | */ | |
514 | if (server->tcpStatus == CifsGood && | |
adfeb3e0 SF |
515 | time_after(jiffies, server->lstrp + 2 * server->echo_interval)) { |
516 | cifs_dbg(VFS, "Server %s has not responded in %lu seconds. Reconnecting...\n", | |
517 | server->hostname, (2 * server->echo_interval) / HZ); | |
ba749e6d JL |
518 | cifs_reconnect(server); |
519 | wake_up(&server->response_q); | |
520 | return true; | |
521 | } | |
522 | ||
523 | return false; | |
524 | } | |
525 | ||
71335664 AV |
526 | static int |
527 | cifs_readv_from_socket(struct TCP_Server_Info *server, struct msghdr *smb_msg) | |
e7015fb1 | 528 | { |
a52c1eb7 JL |
529 | int length = 0; |
530 | int total_read; | |
e7015fb1 | 531 | |
71335664 AV |
532 | smb_msg->msg_control = NULL; |
533 | smb_msg->msg_controllen = 0; | |
e831e6cf | 534 | |
71335664 | 535 | for (total_read = 0; msg_data_left(smb_msg); total_read += length) { |
95edcff4 JL |
536 | try_to_freeze(); |
537 | ||
71335664 AV |
538 | if (server_unresponsive(server)) |
539 | return -ECONNABORTED; | |
ba749e6d | 540 | |
71335664 | 541 | length = sock_recvmsg(server->ssocket, smb_msg, 0); |
42c4dfc2 | 542 | |
71335664 AV |
543 | if (server->tcpStatus == CifsExiting) |
544 | return -ESHUTDOWN; | |
e7015fb1 | 545 | |
71335664 | 546 | if (server->tcpStatus == CifsNeedReconnect) { |
e7015fb1 | 547 | cifs_reconnect(server); |
71335664 AV |
548 | return -ECONNABORTED; |
549 | } | |
550 | ||
551 | if (length == -ERESTARTSYS || | |
552 | length == -EAGAIN || | |
553 | length == -EINTR) { | |
e7015fb1 PS |
554 | /* |
555 | * Minimum sleep to prevent looping, allowing socket | |
556 | * to clear and app threads to set tcpStatus | |
557 | * CifsNeedReconnect if server hung. | |
558 | */ | |
559 | usleep_range(1000, 2000); | |
560 | length = 0; | |
a52c1eb7 | 561 | continue; |
71335664 AV |
562 | } |
563 | ||
564 | if (length <= 0) { | |
09aab880 | 565 | cifs_dbg(FYI, "Received no data or error: %d\n", length); |
e7015fb1 | 566 | cifs_reconnect(server); |
71335664 | 567 | return -ECONNABORTED; |
e7015fb1 PS |
568 | } |
569 | } | |
a52c1eb7 | 570 | return total_read; |
e7015fb1 | 571 | } |
e7015fb1 | 572 | |
e28bc5b1 JL |
573 | int |
574 | cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, | |
575 | unsigned int to_read) | |
42c4dfc2 | 576 | { |
71335664 AV |
577 | struct msghdr smb_msg; |
578 | struct kvec iov = {.iov_base = buf, .iov_len = to_read}; | |
579 | iov_iter_kvec(&smb_msg.msg_iter, READ | ITER_KVEC, &iov, 1, to_read); | |
42c4dfc2 | 580 | |
71335664 AV |
581 | return cifs_readv_from_socket(server, &smb_msg); |
582 | } | |
42c4dfc2 | 583 | |
71335664 AV |
584 | int |
585 | cifs_read_page_from_socket(struct TCP_Server_Info *server, struct page *page, | |
586 | unsigned int to_read) | |
587 | { | |
588 | struct msghdr smb_msg; | |
589 | struct bio_vec bv = {.bv_page = page, .bv_len = to_read}; | |
590 | iov_iter_bvec(&smb_msg.msg_iter, READ | ITER_BVEC, &bv, 1, to_read); | |
591 | return cifs_readv_from_socket(server, &smb_msg); | |
e7015fb1 PS |
592 | } |
593 | ||
98bac62c | 594 | static bool |
fe11e4cc | 595 | is_smb_response(struct TCP_Server_Info *server, unsigned char type) |
98bac62c | 596 | { |
98bac62c PS |
597 | /* |
598 | * The first byte big endian of the length field, | |
599 | * is actually not part of the length but the type | |
600 | * with the most common, zero, as regular data. | |
601 | */ | |
fe11e4cc JL |
602 | switch (type) { |
603 | case RFC1002_SESSION_MESSAGE: | |
604 | /* Regular SMB response */ | |
605 | return true; | |
606 | case RFC1002_SESSION_KEEP_ALIVE: | |
f96637be | 607 | cifs_dbg(FYI, "RFC 1002 session keep alive\n"); |
fe11e4cc JL |
608 | break; |
609 | case RFC1002_POSITIVE_SESSION_RESPONSE: | |
f96637be | 610 | cifs_dbg(FYI, "RFC 1002 positive session response\n"); |
fe11e4cc JL |
611 | break; |
612 | case RFC1002_NEGATIVE_SESSION_RESPONSE: | |
98bac62c PS |
613 | /* |
614 | * We get this from Windows 98 instead of an error on | |
615 | * SMB negprot response. | |
616 | */ | |
f96637be | 617 | cifs_dbg(FYI, "RFC 1002 negative session response\n"); |
98bac62c PS |
618 | /* give server a second to clean up */ |
619 | msleep(1000); | |
620 | /* | |
621 | * Always try 445 first on reconnect since we get NACK | |
622 | * on some if we ever connected to port 139 (the NACK | |
623 | * is since we do not begin with RFC1001 session | |
624 | * initialize frame). | |
625 | */ | |
fe11e4cc | 626 | cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT); |
98bac62c PS |
627 | cifs_reconnect(server); |
628 | wake_up(&server->response_q); | |
fe11e4cc JL |
629 | break; |
630 | default: | |
f96637be | 631 | cifs_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type); |
98bac62c | 632 | cifs_reconnect(server); |
98bac62c PS |
633 | } |
634 | ||
fe11e4cc | 635 | return false; |
98bac62c PS |
636 | } |
637 | ||
e28bc5b1 JL |
638 | void |
639 | dequeue_mid(struct mid_q_entry *mid, bool malformed) | |
ea1f4502 | 640 | { |
ad69bae1 | 641 | #ifdef CONFIG_CIFS_STATS2 |
ea1f4502 | 642 | mid->when_received = jiffies; |
ad69bae1 | 643 | #endif |
ea1f4502 JL |
644 | spin_lock(&GlobalMid_Lock); |
645 | if (!malformed) | |
7c9421e1 | 646 | mid->mid_state = MID_RESPONSE_RECEIVED; |
ea1f4502 | 647 | else |
7c9421e1 | 648 | mid->mid_state = MID_RESPONSE_MALFORMED; |
ea1f4502 | 649 | list_del_init(&mid->qhead); |
ad69bae1 | 650 | spin_unlock(&GlobalMid_Lock); |
ea1f4502 | 651 | } |
ad69bae1 | 652 | |
c8054ebd JL |
653 | static void |
654 | handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, | |
d4e4854f | 655 | char *buf, int malformed) |
ea1f4502 | 656 | { |
316cf94a PS |
657 | if (server->ops->check_trans2 && |
658 | server->ops->check_trans2(mid, server, buf, malformed)) | |
c8054ebd | 659 | return; |
ea1f4502 | 660 | mid->resp_buf = buf; |
7c9421e1 | 661 | mid->large_buf = server->large_buf; |
2a37ef94 JL |
662 | /* Was previous buf put in mpx struct for multi-rsp? */ |
663 | if (!mid->multiRsp) { | |
664 | /* smb buffer will be freed by user thread */ | |
665 | if (server->large_buf) | |
666 | server->bigbuf = NULL; | |
667 | else | |
668 | server->smallbuf = NULL; | |
669 | } | |
ffc00e27 | 670 | dequeue_mid(mid, malformed); |
ad69bae1 PS |
671 | } |
672 | ||
762dfd10 PS |
673 | static void clean_demultiplex_info(struct TCP_Server_Info *server) |
674 | { | |
675 | int length; | |
676 | ||
677 | /* take it off the list, if it's not already */ | |
678 | spin_lock(&cifs_tcp_ses_lock); | |
679 | list_del_init(&server->tcp_ses_list); | |
680 | spin_unlock(&cifs_tcp_ses_lock); | |
681 | ||
682 | spin_lock(&GlobalMid_Lock); | |
683 | server->tcpStatus = CifsExiting; | |
684 | spin_unlock(&GlobalMid_Lock); | |
685 | wake_up_all(&server->response_q); | |
686 | ||
2d86dbc9 | 687 | /* check if we have blocked requests that need to free */ |
fc40f9cf | 688 | spin_lock(&server->req_lock); |
2d86dbc9 PS |
689 | if (server->credits <= 0) |
690 | server->credits = 1; | |
fc40f9cf | 691 | spin_unlock(&server->req_lock); |
762dfd10 PS |
692 | /* |
693 | * Although there should not be any requests blocked on this queue it | |
694 | * can not hurt to be paranoid and try to wake up requests that may | |
695 | * haven been blocked when more than 50 at time were on the wire to the | |
696 | * same server - they now will see the session is in exit state and get | |
697 | * out of SendReceive. | |
698 | */ | |
699 | wake_up_all(&server->request_q); | |
700 | /* give those requests time to exit */ | |
701 | msleep(125); | |
702 | ||
703 | if (server->ssocket) { | |
704 | sock_release(server->ssocket); | |
705 | server->ssocket = NULL; | |
706 | } | |
707 | ||
708 | if (!list_empty(&server->pending_mid_q)) { | |
709 | struct list_head dispose_list; | |
710 | struct mid_q_entry *mid_entry; | |
711 | struct list_head *tmp, *tmp2; | |
712 | ||
713 | INIT_LIST_HEAD(&dispose_list); | |
714 | spin_lock(&GlobalMid_Lock); | |
715 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { | |
716 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
f96637be | 717 | cifs_dbg(FYI, "Clearing mid 0x%llx\n", mid_entry->mid); |
7c9421e1 | 718 | mid_entry->mid_state = MID_SHUTDOWN; |
762dfd10 PS |
719 | list_move(&mid_entry->qhead, &dispose_list); |
720 | } | |
721 | spin_unlock(&GlobalMid_Lock); | |
722 | ||
723 | /* now walk dispose list and issue callbacks */ | |
724 | list_for_each_safe(tmp, tmp2, &dispose_list) { | |
725 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
f96637be | 726 | cifs_dbg(FYI, "Callback mid 0x%llx\n", mid_entry->mid); |
762dfd10 PS |
727 | list_del_init(&mid_entry->qhead); |
728 | mid_entry->callback(mid_entry); | |
729 | } | |
730 | /* 1/8th of sec is more than enough time for them to exit */ | |
731 | msleep(125); | |
732 | } | |
733 | ||
734 | if (!list_empty(&server->pending_mid_q)) { | |
735 | /* | |
736 | * mpx threads have not exited yet give them at least the smb | |
737 | * send timeout time for long ops. | |
738 | * | |
739 | * Due to delays on oplock break requests, we need to wait at | |
740 | * least 45 seconds before giving up on a request getting a | |
741 | * response and going ahead and killing cifsd. | |
742 | */ | |
f96637be | 743 | cifs_dbg(FYI, "Wait for exit from demultiplex thread\n"); |
762dfd10 PS |
744 | msleep(46000); |
745 | /* | |
746 | * If threads still have not exited they are probably never | |
747 | * coming home not much else we can do but free the memory. | |
748 | */ | |
749 | } | |
750 | ||
751 | kfree(server->hostname); | |
752 | kfree(server); | |
753 | ||
754 | length = atomic_dec_return(&tcpSesAllocCount); | |
755 | if (length > 0) | |
11d83360 | 756 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv); |
762dfd10 PS |
757 | } |
758 | ||
e9097ab4 JL |
759 | static int |
760 | standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
761 | { | |
762 | int length; | |
763 | char *buf = server->smallbuf; | |
d4e4854f | 764 | unsigned int pdu_length = get_rfc1002_length(buf); |
e9097ab4 JL |
765 | |
766 | /* make sure this will fit in a large buffer */ | |
1887f601 | 767 | if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) { |
f96637be | 768 | cifs_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length); |
e9097ab4 JL |
769 | cifs_reconnect(server); |
770 | wake_up(&server->response_q); | |
3fabaa27 | 771 | return -ECONNABORTED; |
e9097ab4 JL |
772 | } |
773 | ||
774 | /* switch to large buffer if too big for a small one */ | |
775 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { | |
776 | server->large_buf = true; | |
d4e4854f | 777 | memcpy(server->bigbuf, buf, server->total_read); |
e9097ab4 | 778 | buf = server->bigbuf; |
e9097ab4 JL |
779 | } |
780 | ||
781 | /* now read the rest */ | |
1887f601 PS |
782 | length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, |
783 | pdu_length - HEADER_SIZE(server) + 1 + 4); | |
e9097ab4 JL |
784 | if (length < 0) |
785 | return length; | |
786 | server->total_read += length; | |
787 | ||
d4e4854f | 788 | dump_smb(buf, server->total_read); |
e9097ab4 | 789 | |
4326ed2f PS |
790 | return cifs_handle_standard(server, mid); |
791 | } | |
792 | ||
793 | int | |
794 | cifs_handle_standard(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
795 | { | |
796 | char *buf = server->large_buf ? server->bigbuf : server->smallbuf; | |
797 | int length; | |
798 | ||
e9097ab4 JL |
799 | /* |
800 | * We know that we received enough to get to the MID as we | |
801 | * checked the pdu_length earlier. Now check to see | |
802 | * if the rest of the header is OK. We borrow the length | |
803 | * var for the rest of the loop to avoid a new stack var. | |
804 | * | |
805 | * 48 bytes is enough to display the header and a little bit | |
806 | * into the payload for debugging purposes. | |
807 | */ | |
373512ec | 808 | length = server->ops->check_message(buf, server->total_read, server); |
e9097ab4 JL |
809 | if (length != 0) |
810 | cifs_dump_mem("Bad SMB: ", buf, | |
811 | min_t(unsigned int, server->total_read, 48)); | |
812 | ||
2e44b288 PS |
813 | if (server->ops->is_status_pending && |
814 | server->ops->is_status_pending(buf, server, length)) | |
815 | return -1; | |
816 | ||
ff4fa4a2 JL |
817 | if (!mid) |
818 | return length; | |
e9097ab4 | 819 | |
d4e4854f | 820 | handle_mid(mid, server, buf, length); |
ff4fa4a2 | 821 | return 0; |
e9097ab4 JL |
822 | } |
823 | ||
1da177e4 | 824 | static int |
7c97c200 | 825 | cifs_demultiplex_thread(void *p) |
1da177e4 LT |
826 | { |
827 | int length; | |
7c97c200 | 828 | struct TCP_Server_Info *server = p; |
2a37ef94 JL |
829 | unsigned int pdu_length; |
830 | char *buf = NULL; | |
a5c3e1c7 | 831 | struct task_struct *task_to_wake = NULL; |
1da177e4 | 832 | struct mid_q_entry *mid_entry; |
1da177e4 | 833 | |
1da177e4 | 834 | current->flags |= PF_MEMALLOC; |
f96637be | 835 | cifs_dbg(FYI, "Demultiplex PID: %d\n", task_pid_nr(current)); |
93d0ec85 JL |
836 | |
837 | length = atomic_inc_return(&tcpSesAllocCount); | |
838 | if (length > 1) | |
11d83360 | 839 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv); |
1da177e4 | 840 | |
83144186 | 841 | set_freezable(); |
469ee614 | 842 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
843 | if (try_to_freeze()) |
844 | continue; | |
b8643e1b | 845 | |
2a37ef94 | 846 | if (!allocate_buffers(server)) |
3d9c2472 | 847 | continue; |
b8643e1b | 848 | |
2a37ef94 | 849 | server->large_buf = false; |
2a37ef94 | 850 | buf = server->smallbuf; |
f01d5e14 | 851 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 852 | |
e28bc5b1 | 853 | length = cifs_read_from_socket(server, buf, pdu_length); |
a52c1eb7 | 854 | if (length < 0) |
1da177e4 | 855 | continue; |
2a37ef94 | 856 | server->total_read = length; |
1da177e4 | 857 | |
98bac62c PS |
858 | /* |
859 | * The right amount was read from socket - 4 bytes, | |
860 | * so we can now interpret the length field. | |
861 | */ | |
d4e4854f | 862 | pdu_length = get_rfc1002_length(buf); |
70ca734a | 863 | |
f96637be | 864 | cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length); |
fe11e4cc | 865 | if (!is_smb_response(server, buf[0])) |
fb8c4b14 | 866 | continue; |
e4eb295d | 867 | |
89482a56 | 868 | /* make sure we have enough to get to the MID */ |
1887f601 | 869 | if (pdu_length < HEADER_SIZE(server) - 1 - 4) { |
f96637be JP |
870 | cifs_dbg(VFS, "SMB response too short (%u bytes)\n", |
871 | pdu_length); | |
89482a56 JL |
872 | cifs_reconnect(server); |
873 | wake_up(&server->response_q); | |
874 | continue; | |
e4eb295d | 875 | } |
e7015fb1 | 876 | |
89482a56 | 877 | /* read down to the MID */ |
e28bc5b1 | 878 | length = cifs_read_from_socket(server, buf + 4, |
1887f601 | 879 | HEADER_SIZE(server) - 1 - 4); |
89482a56 | 880 | if (length < 0) |
e4eb295d | 881 | continue; |
2a37ef94 | 882 | server->total_read += length; |
1da177e4 | 883 | |
9bb17e09 PS |
884 | if (server->ops->is_transform_hdr && |
885 | server->ops->receive_transform && | |
886 | server->ops->is_transform_hdr(buf)) { | |
887 | length = server->ops->receive_transform(server, | |
888 | &mid_entry); | |
889 | } else { | |
890 | mid_entry = server->ops->find_mid(server, buf); | |
50c2f753 | 891 | |
9bb17e09 PS |
892 | if (!mid_entry || !mid_entry->receive) |
893 | length = standard_receive3(server, mid_entry); | |
894 | else | |
895 | length = mid_entry->receive(server, mid_entry); | |
896 | } | |
71823baf | 897 | |
e9097ab4 | 898 | if (length < 0) |
fe11e4cc | 899 | continue; |
1da177e4 | 900 | |
d4e4854f | 901 | if (server->large_buf) |
2a37ef94 | 902 | buf = server->bigbuf; |
fda35943 | 903 | |
fda35943 | 904 | server->lstrp = jiffies; |
2b84a36c | 905 | if (mid_entry != NULL) { |
2a37ef94 JL |
906 | if (!mid_entry->multiRsp || mid_entry->multiEnd) |
907 | mid_entry->callback(mid_entry); | |
7f0adb53 PS |
908 | } else if (!server->ops->is_oplock_break || |
909 | !server->ops->is_oplock_break(buf, server)) { | |
f96637be JP |
910 | cifs_dbg(VFS, "No task to wake, unknown frame received! NumMids %d\n", |
911 | atomic_read(&midCount)); | |
1887f601 PS |
912 | cifs_dump_mem("Received Data is: ", buf, |
913 | HEADER_SIZE(server)); | |
3979877e | 914 | #ifdef CONFIG_CIFS_DEBUG2 |
7f0adb53 PS |
915 | if (server->ops->dump_detail) |
916 | server->ops->dump_detail(buf); | |
3979877e SF |
917 | cifs_dump_mids(server); |
918 | #endif /* CIFS_DEBUG2 */ | |
50c2f753 | 919 | |
e4eb295d SF |
920 | } |
921 | } /* end while !EXITING */ | |
922 | ||
fd62cb7e | 923 | /* buffer usually freed in free_mid - need to free it here on exit */ |
2a37ef94 JL |
924 | cifs_buf_release(server->bigbuf); |
925 | if (server->smallbuf) /* no sense logging a debug message if NULL */ | |
926 | cifs_small_buf_release(server->smallbuf); | |
1da177e4 | 927 | |
a5c3e1c7 | 928 | task_to_wake = xchg(&server->tsk, NULL); |
762dfd10 | 929 | clean_demultiplex_info(server); |
a5c3e1c7 SF |
930 | |
931 | /* if server->tsk was NULL then wait for a signal before exiting */ | |
932 | if (!task_to_wake) { | |
933 | set_current_state(TASK_INTERRUPTIBLE); | |
934 | while (!signal_pending(current)) { | |
935 | schedule(); | |
936 | set_current_state(TASK_INTERRUPTIBLE); | |
937 | } | |
938 | set_current_state(TASK_RUNNING); | |
939 | } | |
940 | ||
0468a2cf | 941 | module_put_and_exit(0); |
1da177e4 LT |
942 | } |
943 | ||
c359cf3c JL |
944 | /* extract the host portion of the UNC string */ |
945 | static char * | |
946 | extract_hostname(const char *unc) | |
947 | { | |
948 | const char *src; | |
949 | char *dst, *delim; | |
950 | unsigned int len; | |
951 | ||
952 | /* skip double chars at beginning of string */ | |
953 | /* BB: check validity of these bytes? */ | |
954 | src = unc + 2; | |
955 | ||
956 | /* delimiter between hostname and sharename is always '\\' now */ | |
957 | delim = strchr(src, '\\'); | |
958 | if (!delim) | |
959 | return ERR_PTR(-EINVAL); | |
960 | ||
961 | len = delim - src; | |
962 | dst = kmalloc((len + 1), GFP_KERNEL); | |
963 | if (dst == NULL) | |
964 | return ERR_PTR(-ENOMEM); | |
965 | ||
966 | memcpy(dst, src, len); | |
967 | dst[len] = '\0'; | |
968 | ||
969 | return dst; | |
970 | } | |
971 | ||
8830d7e0 SP |
972 | static int get_option_ul(substring_t args[], unsigned long *option) |
973 | { | |
974 | int rc; | |
975 | char *string; | |
976 | ||
977 | string = match_strdup(args); | |
978 | if (string == NULL) | |
979 | return -ENOMEM; | |
bfa890a3 | 980 | rc = kstrtoul(string, 0, option); |
8830d7e0 SP |
981 | kfree(string); |
982 | ||
983 | return rc; | |
984 | } | |
985 | ||
3da46565 EB |
986 | static int get_option_uid(substring_t args[], kuid_t *result) |
987 | { | |
988 | unsigned long value; | |
989 | kuid_t uid; | |
990 | int rc; | |
991 | ||
992 | rc = get_option_ul(args, &value); | |
993 | if (rc) | |
994 | return rc; | |
995 | ||
996 | uid = make_kuid(current_user_ns(), value); | |
997 | if (!uid_valid(uid)) | |
998 | return -EINVAL; | |
999 | ||
1000 | *result = uid; | |
1001 | return 0; | |
1002 | } | |
1003 | ||
1004 | static int get_option_gid(substring_t args[], kgid_t *result) | |
1005 | { | |
1006 | unsigned long value; | |
1007 | kgid_t gid; | |
1008 | int rc; | |
1009 | ||
1010 | rc = get_option_ul(args, &value); | |
1011 | if (rc) | |
1012 | return rc; | |
1013 | ||
1014 | gid = make_kgid(current_user_ns(), value); | |
1015 | if (!gid_valid(gid)) | |
1016 | return -EINVAL; | |
1017 | ||
1018 | *result = gid; | |
1019 | return 0; | |
1020 | } | |
8830d7e0 SP |
1021 | |
1022 | static int cifs_parse_security_flavors(char *value, | |
1023 | struct smb_vol *vol) | |
1024 | { | |
1025 | ||
1026 | substring_t args[MAX_OPT_ARGS]; | |
1027 | ||
1e3cc57e JL |
1028 | /* |
1029 | * With mount options, the last one should win. Reset any existing | |
1030 | * settings back to default. | |
1031 | */ | |
1032 | vol->sectype = Unspecified; | |
1033 | vol->sign = false; | |
1034 | ||
8830d7e0 | 1035 | switch (match_token(value, cifs_secflavor_tokens, args)) { |
3f618223 JL |
1036 | case Opt_sec_krb5p: |
1037 | cifs_dbg(VFS, "sec=krb5p is not supported!\n"); | |
1038 | return 1; | |
1039 | case Opt_sec_krb5i: | |
1040 | vol->sign = true; | |
1041 | /* Fallthrough */ | |
8830d7e0 | 1042 | case Opt_sec_krb5: |
1e3cc57e | 1043 | vol->sectype = Kerberos; |
8830d7e0 | 1044 | break; |
3f618223 | 1045 | case Opt_sec_ntlmsspi: |
1e3cc57e | 1046 | vol->sign = true; |
3f618223 | 1047 | /* Fallthrough */ |
8830d7e0 | 1048 | case Opt_sec_ntlmssp: |
1e3cc57e | 1049 | vol->sectype = RawNTLMSSP; |
8830d7e0 | 1050 | break; |
3f618223 | 1051 | case Opt_sec_ntlmi: |
1e3cc57e | 1052 | vol->sign = true; |
3f618223 | 1053 | /* Fallthrough */ |
8830d7e0 | 1054 | case Opt_ntlm: |
1e3cc57e | 1055 | vol->sectype = NTLM; |
8830d7e0 | 1056 | break; |
3f618223 | 1057 | case Opt_sec_ntlmv2i: |
1e3cc57e | 1058 | vol->sign = true; |
3f618223 | 1059 | /* Fallthrough */ |
7659624f | 1060 | case Opt_sec_ntlmv2: |
1e3cc57e | 1061 | vol->sectype = NTLMv2; |
8830d7e0 SP |
1062 | break; |
1063 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
1064 | case Opt_sec_lanman: | |
1e3cc57e | 1065 | vol->sectype = LANMAN; |
8830d7e0 SP |
1066 | break; |
1067 | #endif | |
1068 | case Opt_sec_none: | |
1069 | vol->nullauth = 1; | |
1070 | break; | |
1071 | default: | |
f96637be | 1072 | cifs_dbg(VFS, "bad security option: %s\n", value); |
8830d7e0 SP |
1073 | return 1; |
1074 | } | |
1075 | ||
1076 | return 0; | |
1077 | } | |
1078 | ||
15b6a473 JL |
1079 | static int |
1080 | cifs_parse_cache_flavor(char *value, struct smb_vol *vol) | |
1081 | { | |
1082 | substring_t args[MAX_OPT_ARGS]; | |
1083 | ||
1084 | switch (match_token(value, cifs_cacheflavor_tokens, args)) { | |
1085 | case Opt_cache_loose: | |
1086 | vol->direct_io = false; | |
1087 | vol->strict_io = false; | |
1088 | break; | |
1089 | case Opt_cache_strict: | |
1090 | vol->direct_io = false; | |
1091 | vol->strict_io = true; | |
1092 | break; | |
1093 | case Opt_cache_none: | |
1094 | vol->direct_io = true; | |
1095 | vol->strict_io = false; | |
1096 | break; | |
1097 | default: | |
f96637be | 1098 | cifs_dbg(VFS, "bad cache= option: %s\n", value); |
15b6a473 JL |
1099 | return 1; |
1100 | } | |
1101 | return 0; | |
1102 | } | |
1103 | ||
23db65f5 JL |
1104 | static int |
1105 | cifs_parse_smb_version(char *value, struct smb_vol *vol) | |
1106 | { | |
1107 | substring_t args[MAX_OPT_ARGS]; | |
1108 | ||
1109 | switch (match_token(value, cifs_smb_version_tokens, args)) { | |
1110 | case Smb_1: | |
1111 | vol->ops = &smb1_operations; | |
1112 | vol->vals = &smb1_values; | |
1113 | break; | |
1080ef75 | 1114 | #ifdef CONFIG_CIFS_SMB2 |
dd446b16 | 1115 | case Smb_20: |
53ef1016 | 1116 | vol->ops = &smb20_operations; |
dd446b16 SF |
1117 | vol->vals = &smb20_values; |
1118 | break; | |
1080ef75 SF |
1119 | case Smb_21: |
1120 | vol->ops = &smb21_operations; | |
1121 | vol->vals = &smb21_values; | |
1122 | break; | |
e4aa25e7 | 1123 | case Smb_30: |
38107d45 | 1124 | vol->ops = &smb30_operations; |
e4aa25e7 SF |
1125 | vol->vals = &smb30_values; |
1126 | break; | |
20b6d8b4 SF |
1127 | case Smb_302: |
1128 | vol->ops = &smb30_operations; /* currently identical with 3.0 */ | |
1129 | vol->vals = &smb302_values; | |
1130 | break; | |
5f7fbf73 SF |
1131 | #ifdef CONFIG_CIFS_SMB311 |
1132 | case Smb_311: | |
aab1893d | 1133 | vol->ops = &smb311_operations; |
5f7fbf73 SF |
1134 | vol->vals = &smb311_values; |
1135 | break; | |
1136 | #endif /* SMB311 */ | |
1080ef75 | 1137 | #endif |
23db65f5 | 1138 | default: |
f96637be | 1139 | cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value); |
23db65f5 JL |
1140 | return 1; |
1141 | } | |
1142 | return 0; | |
1143 | } | |
1144 | ||
d387a5c5 JL |
1145 | /* |
1146 | * Parse a devname into substrings and populate the vol->UNC and vol->prepath | |
1147 | * fields with the result. Returns 0 on success and an error otherwise. | |
1148 | */ | |
1149 | static int | |
1150 | cifs_parse_devname(const char *devname, struct smb_vol *vol) | |
1151 | { | |
1152 | char *pos; | |
1153 | const char *delims = "/\\"; | |
1154 | size_t len; | |
1155 | ||
1156 | /* make sure we have a valid UNC double delimiter prefix */ | |
1157 | len = strspn(devname, delims); | |
1158 | if (len != 2) | |
1159 | return -EINVAL; | |
1160 | ||
1161 | /* find delimiter between host and sharename */ | |
1162 | pos = strpbrk(devname + 2, delims); | |
1163 | if (!pos) | |
1164 | return -EINVAL; | |
1165 | ||
1166 | /* skip past delimiter */ | |
1167 | ++pos; | |
1168 | ||
1169 | /* now go until next delimiter or end of string */ | |
1170 | len = strcspn(pos, delims); | |
1171 | ||
1172 | /* move "pos" up to delimiter or NULL */ | |
1173 | pos += len; | |
1174 | vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL); | |
1175 | if (!vol->UNC) | |
1176 | return -ENOMEM; | |
1177 | ||
1178 | convert_delimiter(vol->UNC, '\\'); | |
1179 | ||
11e31647 SP |
1180 | /* skip any delimiter */ |
1181 | if (*pos == '/' || *pos == '\\') | |
1182 | pos++; | |
1183 | ||
1184 | /* If pos is NULL then no prepath */ | |
1185 | if (!*pos) | |
d387a5c5 JL |
1186 | return 0; |
1187 | ||
1188 | vol->prepath = kstrdup(pos, GFP_KERNEL); | |
1189 | if (!vol->prepath) | |
1190 | return -ENOMEM; | |
1191 | ||
1192 | return 0; | |
1193 | } | |
1194 | ||
1da177e4 | 1195 | static int |
b946845a | 1196 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
50c2f753 | 1197 | struct smb_vol *vol) |
1da177e4 | 1198 | { |
8830d7e0 | 1199 | char *data, *end; |
957df453 | 1200 | char *mountdata_copy = NULL, *options; |
1da177e4 LT |
1201 | unsigned int temp_len, i, j; |
1202 | char separator[2]; | |
9b9d6b24 JL |
1203 | short int override_uid = -1; |
1204 | short int override_gid = -1; | |
1205 | bool uid_specified = false; | |
1206 | bool gid_specified = false; | |
d8162558 JL |
1207 | bool sloppy = false; |
1208 | char *invalid = NULL; | |
88463999 | 1209 | char *nodename = utsname()->nodename; |
8830d7e0 SP |
1210 | char *string = NULL; |
1211 | char *tmp_end, *value; | |
1212 | char delim; | |
b979aaa1 JL |
1213 | bool got_ip = false; |
1214 | unsigned short port = 0; | |
1215 | struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr; | |
1da177e4 LT |
1216 | |
1217 | separator[0] = ','; | |
50c2f753 | 1218 | separator[1] = 0; |
8830d7e0 | 1219 | delim = separator[0]; |
1da177e4 | 1220 | |
6ee9542a JL |
1221 | /* ensure we always start with zeroed-out smb_vol */ |
1222 | memset(vol, 0, sizeof(*vol)); | |
1223 | ||
88463999 JL |
1224 | /* |
1225 | * does not have to be perfect mapping since field is | |
1226 | * informational, only used for servers that do not support | |
1227 | * port 445 and it can be overridden at mount time | |
1228 | */ | |
1397f2ee JL |
1229 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
1230 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
1231 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
1232 | ||
1397f2ee | 1233 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
1234 | /* null target name indicates to use *SMBSERVR default called name |
1235 | if we end up sending RFC1001 session initialize */ | |
1236 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
1237 | vol->cred_uid = current_uid(); |
1238 | vol->linux_uid = current_uid(); | |
a001e5b5 | 1239 | vol->linux_gid = current_gid(); |
f55ed1a8 | 1240 | |
2baa2682 SF |
1241 | /* |
1242 | * default to SFM style remapping of seven reserved characters | |
1243 | * unless user overrides it or we negotiate CIFS POSIX where | |
1244 | * it is unnecessary. Can not simultaneously use more than one mapping | |
1245 | * since then readdir could list files that open could not open | |
1246 | */ | |
1247 | vol->remap = true; | |
1248 | ||
f55ed1a8 JL |
1249 | /* default to only allowing write access to owner of the mount */ |
1250 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
1251 | |
1252 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
1253 | /* default is always to request posix paths. */ |
1254 | vol->posix_paths = 1; | |
a0c9217f JL |
1255 | /* default to using server inode numbers where available */ |
1256 | vol->server_ino = 1; | |
ac67055e | 1257 | |
1b359204 JL |
1258 | /* default is to use strict cifs caching semantics */ |
1259 | vol->strict_io = true; | |
1260 | ||
6d20e840 SJ |
1261 | vol->actimeo = CIFS_DEF_ACTIMEO; |
1262 | ||
23db65f5 JL |
1263 | /* FIXME: add autonegotiation -- for now, SMB1 is default */ |
1264 | vol->ops = &smb1_operations; | |
1265 | vol->vals = &smb1_values; | |
1266 | ||
b782fcc1 RV |
1267 | vol->echo_interval = SMB_ECHO_INTERVAL_DEFAULT; |
1268 | ||
b946845a SF |
1269 | if (!mountdata) |
1270 | goto cifs_parse_mount_err; | |
1271 | ||
1272 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); | |
1273 | if (!mountdata_copy) | |
1274 | goto cifs_parse_mount_err; | |
1da177e4 | 1275 | |
b946845a | 1276 | options = mountdata_copy; |
4906e50b | 1277 | end = options + strlen(options); |
8830d7e0 | 1278 | |
50c2f753 | 1279 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 1280 | if (options[4] != 0) { |
1da177e4 LT |
1281 | separator[0] = options[4]; |
1282 | options += 5; | |
1283 | } else { | |
f96637be | 1284 | cifs_dbg(FYI, "Null separator not allowed\n"); |
1da177e4 LT |
1285 | } |
1286 | } | |
3d3ea8e6 SP |
1287 | vol->backupuid_specified = false; /* no backup intent for a user */ |
1288 | vol->backupgid_specified = false; /* no backup intent for a group */ | |
50c2f753 | 1289 | |
37d4f99b JL |
1290 | switch (cifs_parse_devname(devname, vol)) { |
1291 | case 0: | |
1292 | break; | |
1293 | case -ENOMEM: | |
1294 | cifs_dbg(VFS, "Unable to allocate memory for devname.\n"); | |
1295 | goto cifs_parse_mount_err; | |
1296 | case -EINVAL: | |
1297 | cifs_dbg(VFS, "Malformed UNC in devname.\n"); | |
1298 | goto cifs_parse_mount_err; | |
1299 | default: | |
1300 | cifs_dbg(VFS, "Unknown error parsing devname.\n"); | |
1301 | goto cifs_parse_mount_err; | |
d387a5c5 JL |
1302 | } |
1303 | ||
1da177e4 | 1304 | while ((data = strsep(&options, separator)) != NULL) { |
8830d7e0 SP |
1305 | substring_t args[MAX_OPT_ARGS]; |
1306 | unsigned long option; | |
1307 | int token; | |
1308 | ||
1da177e4 LT |
1309 | if (!*data) |
1310 | continue; | |
1da177e4 | 1311 | |
8830d7e0 SP |
1312 | token = match_token(data, cifs_mount_option_tokens, args); |
1313 | ||
1314 | switch (token) { | |
1315 | ||
1316 | /* Ingnore the following */ | |
1317 | case Opt_ignore: | |
1318 | break; | |
1319 | ||
1320 | /* Boolean values */ | |
1321 | case Opt_user_xattr: | |
1da177e4 | 1322 | vol->no_xattr = 0; |
8830d7e0 SP |
1323 | break; |
1324 | case Opt_nouser_xattr: | |
1da177e4 | 1325 | vol->no_xattr = 1; |
8830d7e0 SP |
1326 | break; |
1327 | case Opt_forceuid: | |
9b9d6b24 | 1328 | override_uid = 1; |
8830d7e0 SP |
1329 | break; |
1330 | case Opt_noforceuid: | |
9b9d6b24 | 1331 | override_uid = 0; |
8830d7e0 | 1332 | break; |
72bd481f JL |
1333 | case Opt_forcegid: |
1334 | override_gid = 1; | |
1335 | break; | |
1336 | case Opt_noforcegid: | |
1337 | override_gid = 0; | |
1338 | break; | |
8830d7e0 | 1339 | case Opt_noblocksend: |
edf1ae40 | 1340 | vol->noblocksnd = 1; |
8830d7e0 SP |
1341 | break; |
1342 | case Opt_noautotune: | |
edf1ae40 | 1343 | vol->noautotune = 1; |
8830d7e0 SP |
1344 | break; |
1345 | case Opt_hard: | |
1da177e4 | 1346 | vol->retry = 1; |
8830d7e0 SP |
1347 | break; |
1348 | case Opt_soft: | |
1da177e4 | 1349 | vol->retry = 0; |
8830d7e0 SP |
1350 | break; |
1351 | case Opt_perm: | |
1da177e4 | 1352 | vol->noperm = 0; |
8830d7e0 SP |
1353 | break; |
1354 | case Opt_noperm: | |
1da177e4 | 1355 | vol->noperm = 1; |
8830d7e0 SP |
1356 | break; |
1357 | case Opt_mapchars: | |
2baa2682 SF |
1358 | vol->sfu_remap = true; |
1359 | vol->remap = false; /* disable SFM mapping */ | |
8830d7e0 SP |
1360 | break; |
1361 | case Opt_nomapchars: | |
2baa2682 SF |
1362 | vol->sfu_remap = false; |
1363 | break; | |
1364 | case Opt_mapposix: | |
1365 | vol->remap = true; | |
1366 | vol->sfu_remap = false; /* disable SFU mapping */ | |
1367 | break; | |
1368 | case Opt_nomapposix: | |
1369 | vol->remap = false; | |
8830d7e0 SP |
1370 | break; |
1371 | case Opt_sfu: | |
50c2f753 | 1372 | vol->sfu_emul = 1; |
8830d7e0 SP |
1373 | break; |
1374 | case Opt_nosfu: | |
50c2f753 | 1375 | vol->sfu_emul = 0; |
8830d7e0 SP |
1376 | break; |
1377 | case Opt_nodfs: | |
2c1b8615 | 1378 | vol->nodfs = 1; |
8830d7e0 SP |
1379 | break; |
1380 | case Opt_posixpaths: | |
ac67055e | 1381 | vol->posix_paths = 1; |
8830d7e0 SP |
1382 | break; |
1383 | case Opt_noposixpaths: | |
ac67055e | 1384 | vol->posix_paths = 0; |
8830d7e0 SP |
1385 | break; |
1386 | case Opt_nounix: | |
c18c842b | 1387 | vol->no_linux_ext = 1; |
8830d7e0 SP |
1388 | break; |
1389 | case Opt_nocase: | |
50c2f753 | 1390 | vol->nocase = 1; |
8830d7e0 SP |
1391 | break; |
1392 | case Opt_brl: | |
c46fa8ac | 1393 | vol->nobrl = 0; |
8830d7e0 SP |
1394 | break; |
1395 | case Opt_nobrl: | |
c46fa8ac | 1396 | vol->nobrl = 1; |
5cfdddcf PS |
1397 | /* |
1398 | * turn off mandatory locking in mode | |
8830d7e0 | 1399 | * if remote locking is turned off since the |
5cfdddcf PS |
1400 | * local vfs will do advisory |
1401 | */ | |
50c2f753 SF |
1402 | if (vol->file_mode == |
1403 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1404 | vol->file_mode = S_IALLUGO; |
8830d7e0 SP |
1405 | break; |
1406 | case Opt_forcemandatorylock: | |
13a6e42a | 1407 | vol->mand_lock = 1; |
8830d7e0 SP |
1408 | break; |
1409 | case Opt_setuids: | |
1da177e4 | 1410 | vol->setuids = 1; |
8830d7e0 SP |
1411 | break; |
1412 | case Opt_nosetuids: | |
1da177e4 | 1413 | vol->setuids = 0; |
8830d7e0 | 1414 | break; |
95932655 SF |
1415 | case Opt_setuidfromacl: |
1416 | vol->setuidfromacl = 1; | |
1417 | break; | |
8830d7e0 | 1418 | case Opt_dynperm: |
d0a9c078 | 1419 | vol->dynperm = true; |
8830d7e0 SP |
1420 | break; |
1421 | case Opt_nodynperm: | |
d0a9c078 | 1422 | vol->dynperm = false; |
8830d7e0 SP |
1423 | break; |
1424 | case Opt_nohard: | |
1da177e4 | 1425 | vol->retry = 0; |
8830d7e0 SP |
1426 | break; |
1427 | case Opt_nosoft: | |
1da177e4 | 1428 | vol->retry = 1; |
8830d7e0 SP |
1429 | break; |
1430 | case Opt_nointr: | |
1da177e4 | 1431 | vol->intr = 0; |
8830d7e0 SP |
1432 | break; |
1433 | case Opt_intr: | |
1da177e4 | 1434 | vol->intr = 1; |
8830d7e0 SP |
1435 | break; |
1436 | case Opt_nostrictsync: | |
be652445 | 1437 | vol->nostrictsync = 1; |
8830d7e0 SP |
1438 | break; |
1439 | case Opt_strictsync: | |
be652445 | 1440 | vol->nostrictsync = 0; |
8830d7e0 SP |
1441 | break; |
1442 | case Opt_serverino: | |
1da177e4 | 1443 | vol->server_ino = 1; |
8830d7e0 SP |
1444 | break; |
1445 | case Opt_noserverino: | |
1da177e4 | 1446 | vol->server_ino = 0; |
8830d7e0 SP |
1447 | break; |
1448 | case Opt_rwpidforward: | |
d4ffff1f | 1449 | vol->rwpidforward = 1; |
8830d7e0 SP |
1450 | break; |
1451 | case Opt_cifsacl: | |
0a4b92c0 | 1452 | vol->cifs_acl = 1; |
8830d7e0 SP |
1453 | break; |
1454 | case Opt_nocifsacl: | |
0a4b92c0 | 1455 | vol->cifs_acl = 0; |
8830d7e0 SP |
1456 | break; |
1457 | case Opt_acl: | |
1da177e4 | 1458 | vol->no_psx_acl = 0; |
8830d7e0 SP |
1459 | break; |
1460 | case Opt_noacl: | |
1da177e4 | 1461 | vol->no_psx_acl = 1; |
8830d7e0 SP |
1462 | break; |
1463 | case Opt_locallease: | |
84210e91 | 1464 | vol->local_lease = 1; |
8830d7e0 SP |
1465 | break; |
1466 | case Opt_sign: | |
1e3cc57e | 1467 | vol->sign = true; |
8830d7e0 SP |
1468 | break; |
1469 | case Opt_seal: | |
95b1cb90 | 1470 | /* we do not do the following in secFlags because seal |
8830d7e0 SP |
1471 | * is a per tree connection (mount) not a per socket |
1472 | * or per-smb connection option in the protocol | |
1473 | * vol->secFlg |= CIFSSEC_MUST_SEAL; | |
1474 | */ | |
95b1cb90 | 1475 | vol->seal = 1; |
8830d7e0 | 1476 | break; |
8830d7e0 | 1477 | case Opt_noac: |
0b456f04 | 1478 | pr_warn("CIFS: Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n"); |
8830d7e0 SP |
1479 | break; |
1480 | case Opt_fsc: | |
607a569d | 1481 | #ifndef CONFIG_CIFS_FSCACHE |
f96637be | 1482 | cifs_dbg(VFS, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n"); |
b946845a | 1483 | goto cifs_parse_mount_err; |
607a569d | 1484 | #endif |
fa1df75d | 1485 | vol->fsc = true; |
8830d7e0 SP |
1486 | break; |
1487 | case Opt_mfsymlinks: | |
736a3320 | 1488 | vol->mfsymlinks = true; |
8830d7e0 SP |
1489 | break; |
1490 | case Opt_multiuser: | |
0eb8a132 | 1491 | vol->multiuser = true; |
8830d7e0 | 1492 | break; |
d8162558 JL |
1493 | case Opt_sloppy: |
1494 | sloppy = true; | |
1495 | break; | |
a0b3df5c JL |
1496 | case Opt_nosharesock: |
1497 | vol->nosharesock = true; | |
1498 | break; | |
b2a30774 SF |
1499 | case Opt_nopersistent: |
1500 | vol->nopersistent = true; | |
1501 | if (vol->persistent) { | |
1502 | cifs_dbg(VFS, | |
1503 | "persistenthandles mount options conflict\n"); | |
1504 | goto cifs_parse_mount_err; | |
1505 | } | |
1506 | break; | |
1507 | case Opt_persistent: | |
1508 | vol->persistent = true; | |
592fafe6 | 1509 | if ((vol->nopersistent) || (vol->resilient)) { |
b2a30774 SF |
1510 | cifs_dbg(VFS, |
1511 | "persistenthandles mount options conflict\n"); | |
1512 | goto cifs_parse_mount_err; | |
1513 | } | |
1514 | break; | |
592fafe6 SF |
1515 | case Opt_resilient: |
1516 | vol->resilient = true; | |
1517 | if (vol->persistent) { | |
1518 | cifs_dbg(VFS, | |
1519 | "persistenthandles mount options conflict\n"); | |
1520 | goto cifs_parse_mount_err; | |
1521 | } | |
1522 | break; | |
1523 | case Opt_noresilient: | |
1524 | vol->resilient = false; /* already the default */ | |
1525 | break; | |
39566443 GP |
1526 | case Opt_domainauto: |
1527 | vol->domainauto = true; | |
1528 | break; | |
8830d7e0 SP |
1529 | |
1530 | /* Numeric Values */ | |
1531 | case Opt_backupuid: | |
3da46565 | 1532 | if (get_option_uid(args, &vol->backupuid)) { |
f96637be JP |
1533 | cifs_dbg(VFS, "%s: Invalid backupuid value\n", |
1534 | __func__); | |
3d3ea8e6 SP |
1535 | goto cifs_parse_mount_err; |
1536 | } | |
1537 | vol->backupuid_specified = true; | |
8830d7e0 SP |
1538 | break; |
1539 | case Opt_backupgid: | |
3da46565 | 1540 | if (get_option_gid(args, &vol->backupgid)) { |
f96637be JP |
1541 | cifs_dbg(VFS, "%s: Invalid backupgid value\n", |
1542 | __func__); | |
3d3ea8e6 SP |
1543 | goto cifs_parse_mount_err; |
1544 | } | |
1545 | vol->backupgid_specified = true; | |
8830d7e0 SP |
1546 | break; |
1547 | case Opt_uid: | |
3da46565 | 1548 | if (get_option_uid(args, &vol->linux_uid)) { |
f96637be JP |
1549 | cifs_dbg(VFS, "%s: Invalid uid value\n", |
1550 | __func__); | |
8830d7e0 SP |
1551 | goto cifs_parse_mount_err; |
1552 | } | |
8830d7e0 SP |
1553 | uid_specified = true; |
1554 | break; | |
1555 | case Opt_cruid: | |
3da46565 | 1556 | if (get_option_uid(args, &vol->cred_uid)) { |
f96637be JP |
1557 | cifs_dbg(VFS, "%s: Invalid cruid value\n", |
1558 | __func__); | |
8830d7e0 SP |
1559 | goto cifs_parse_mount_err; |
1560 | } | |
8830d7e0 SP |
1561 | break; |
1562 | case Opt_gid: | |
3da46565 | 1563 | if (get_option_gid(args, &vol->linux_gid)) { |
f96637be JP |
1564 | cifs_dbg(VFS, "%s: Invalid gid value\n", |
1565 | __func__); | |
8830d7e0 SP |
1566 | goto cifs_parse_mount_err; |
1567 | } | |
8830d7e0 SP |
1568 | gid_specified = true; |
1569 | break; | |
1570 | case Opt_file_mode: | |
1571 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1572 | cifs_dbg(VFS, "%s: Invalid file_mode value\n", |
1573 | __func__); | |
8830d7e0 SP |
1574 | goto cifs_parse_mount_err; |
1575 | } | |
1576 | vol->file_mode = option; | |
1577 | break; | |
1578 | case Opt_dirmode: | |
1579 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1580 | cifs_dbg(VFS, "%s: Invalid dir_mode value\n", |
1581 | __func__); | |
8830d7e0 SP |
1582 | goto cifs_parse_mount_err; |
1583 | } | |
1584 | vol->dir_mode = option; | |
1585 | break; | |
1586 | case Opt_port: | |
b979aaa1 JL |
1587 | if (get_option_ul(args, &option) || |
1588 | option > USHRT_MAX) { | |
f96637be JP |
1589 | cifs_dbg(VFS, "%s: Invalid port value\n", |
1590 | __func__); | |
8830d7e0 SP |
1591 | goto cifs_parse_mount_err; |
1592 | } | |
b979aaa1 | 1593 | port = (unsigned short)option; |
8830d7e0 SP |
1594 | break; |
1595 | case Opt_rsize: | |
1596 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1597 | cifs_dbg(VFS, "%s: Invalid rsize value\n", |
1598 | __func__); | |
b946845a | 1599 | goto cifs_parse_mount_err; |
8830d7e0 SP |
1600 | } |
1601 | vol->rsize = option; | |
1602 | break; | |
1603 | case Opt_wsize: | |
1604 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1605 | cifs_dbg(VFS, "%s: Invalid wsize value\n", |
1606 | __func__); | |
8830d7e0 SP |
1607 | goto cifs_parse_mount_err; |
1608 | } | |
1609 | vol->wsize = option; | |
1610 | break; | |
1611 | case Opt_actimeo: | |
1612 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1613 | cifs_dbg(VFS, "%s: Invalid actimeo value\n", |
1614 | __func__); | |
8830d7e0 SP |
1615 | goto cifs_parse_mount_err; |
1616 | } | |
1617 | vol->actimeo = HZ * option; | |
1618 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
f96637be | 1619 | cifs_dbg(VFS, "attribute cache timeout too large\n"); |
8830d7e0 SP |
1620 | goto cifs_parse_mount_err; |
1621 | } | |
1622 | break; | |
adfeb3e0 SF |
1623 | case Opt_echo_interval: |
1624 | if (get_option_ul(args, &option)) { | |
1625 | cifs_dbg(VFS, "%s: Invalid echo interval value\n", | |
1626 | __func__); | |
1627 | goto cifs_parse_mount_err; | |
1628 | } | |
1629 | vol->echo_interval = option; | |
1630 | break; | |
8b217fe7 SF |
1631 | case Opt_snapshot: |
1632 | if (get_option_ul(args, &option)) { | |
1633 | cifs_dbg(VFS, "%s: Invalid snapshot time\n", | |
1634 | __func__); | |
1635 | goto cifs_parse_mount_err; | |
1636 | } | |
1637 | vol->snapshot_time = option; | |
1638 | break; | |
141891f4 SF |
1639 | case Opt_max_credits: |
1640 | if (get_option_ul(args, &option) || (option < 20) || | |
1641 | (option > 60000)) { | |
1642 | cifs_dbg(VFS, "%s: Invalid max_credits value\n", | |
1643 | __func__); | |
1644 | goto cifs_parse_mount_err; | |
1645 | } | |
1646 | vol->max_credits = option; | |
1647 | break; | |
8830d7e0 SP |
1648 | |
1649 | /* String Arguments */ | |
1650 | ||
4fe9e963 SP |
1651 | case Opt_blank_user: |
1652 | /* null user, ie. anonymous authentication */ | |
1653 | vol->nullauth = 1; | |
1654 | vol->username = NULL; | |
1655 | break; | |
8830d7e0 SP |
1656 | case Opt_user: |
1657 | string = match_strdup(args); | |
1658 | if (string == NULL) | |
1659 | goto out_nomem; | |
1660 | ||
8c3a2b4c SL |
1661 | if (strnlen(string, CIFS_MAX_USERNAME_LEN) > |
1662 | CIFS_MAX_USERNAME_LEN) { | |
0b456f04 | 1663 | pr_warn("CIFS: username too long\n"); |
8830d7e0 SP |
1664 | goto cifs_parse_mount_err; |
1665 | } | |
2bd50fb3 TK |
1666 | |
1667 | kfree(vol->username); | |
8830d7e0 | 1668 | vol->username = kstrdup(string, GFP_KERNEL); |
f96637be | 1669 | if (!vol->username) |
8830d7e0 | 1670 | goto cifs_parse_mount_err; |
8830d7e0 SP |
1671 | break; |
1672 | case Opt_blank_pass: | |
8830d7e0 SP |
1673 | /* passwords have to be handled differently |
1674 | * to allow the character used for deliminator | |
1675 | * to be passed within them | |
1676 | */ | |
1677 | ||
c369c9a4 SP |
1678 | /* |
1679 | * Check if this is a case where the password | |
1680 | * starts with a delimiter | |
1681 | */ | |
1682 | tmp_end = strchr(data, '='); | |
1683 | tmp_end++; | |
1684 | if (!(tmp_end < end && tmp_end[1] == delim)) { | |
1685 | /* No it is not. Set the password to NULL */ | |
d6ccf499 | 1686 | kfree(vol->password); |
c369c9a4 SP |
1687 | vol->password = NULL; |
1688 | break; | |
1689 | } | |
1690 | /* Yes it is. Drop down to Opt_pass below.*/ | |
1691 | case Opt_pass: | |
8830d7e0 SP |
1692 | /* Obtain the value string */ |
1693 | value = strchr(data, '='); | |
10238074 | 1694 | value++; |
8830d7e0 SP |
1695 | |
1696 | /* Set tmp_end to end of the string */ | |
1697 | tmp_end = (char *) value + strlen(value); | |
1698 | ||
1699 | /* Check if following character is the deliminator | |
1700 | * If yes, we have encountered a double deliminator | |
1701 | * reset the NULL character to the deliminator | |
1702 | */ | |
e73f843a | 1703 | if (tmp_end < end && tmp_end[1] == delim) { |
8830d7e0 SP |
1704 | tmp_end[0] = delim; |
1705 | ||
e73f843a SJ |
1706 | /* Keep iterating until we get to a single |
1707 | * deliminator OR the end | |
1708 | */ | |
1709 | while ((tmp_end = strchr(tmp_end, delim)) | |
1710 | != NULL && (tmp_end[1] == delim)) { | |
1711 | tmp_end = (char *) &tmp_end[2]; | |
1712 | } | |
1713 | ||
1714 | /* Reset var options to point to next element */ | |
1715 | if (tmp_end) { | |
1716 | tmp_end[0] = '\0'; | |
1717 | options = (char *) &tmp_end[1]; | |
1718 | } else | |
1719 | /* Reached the end of the mount option | |
1720 | * string */ | |
1721 | options = end; | |
8830d7e0 SP |
1722 | } |
1723 | ||
d6ccf499 | 1724 | kfree(vol->password); |
8830d7e0 SP |
1725 | /* Now build new password string */ |
1726 | temp_len = strlen(value); | |
1727 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); | |
1728 | if (vol->password == NULL) { | |
0b456f04 | 1729 | pr_warn("CIFS: no memory for password\n"); |
8830d7e0 SP |
1730 | goto cifs_parse_mount_err; |
1731 | } | |
1732 | ||
1733 | for (i = 0, j = 0; i < temp_len; i++, j++) { | |
1734 | vol->password[j] = value[i]; | |
1735 | if ((value[i] == delim) && | |
1736 | value[i+1] == delim) | |
1737 | /* skip the second deliminator */ | |
1738 | i++; | |
1739 | } | |
1740 | vol->password[j] = '\0'; | |
1741 | break; | |
4fe9e963 | 1742 | case Opt_blank_ip: |
b979aaa1 JL |
1743 | /* FIXME: should this be an error instead? */ |
1744 | got_ip = false; | |
4fe9e963 | 1745 | break; |
8830d7e0 SP |
1746 | case Opt_ip: |
1747 | string = match_strdup(args); | |
1748 | if (string == NULL) | |
1749 | goto out_nomem; | |
1750 | ||
b979aaa1 JL |
1751 | if (!cifs_convert_address(dstaddr, string, |
1752 | strlen(string))) { | |
0b456f04 | 1753 | pr_err("CIFS: bad ip= option (%s).\n", string); |
8830d7e0 SP |
1754 | goto cifs_parse_mount_err; |
1755 | } | |
b979aaa1 | 1756 | got_ip = true; |
8830d7e0 | 1757 | break; |
8830d7e0 SP |
1758 | case Opt_domain: |
1759 | string = match_strdup(args); | |
1760 | if (string == NULL) | |
1761 | goto out_nomem; | |
1762 | ||
057d6332 CG |
1763 | if (strnlen(string, CIFS_MAX_DOMAINNAME_LEN) |
1764 | == CIFS_MAX_DOMAINNAME_LEN) { | |
0b456f04 | 1765 | pr_warn("CIFS: domain name too long\n"); |
8830d7e0 SP |
1766 | goto cifs_parse_mount_err; |
1767 | } | |
1768 | ||
2bd50fb3 | 1769 | kfree(vol->domainname); |
8830d7e0 SP |
1770 | vol->domainname = kstrdup(string, GFP_KERNEL); |
1771 | if (!vol->domainname) { | |
0b456f04 | 1772 | pr_warn("CIFS: no memory for domainname\n"); |
8830d7e0 SP |
1773 | goto cifs_parse_mount_err; |
1774 | } | |
f96637be | 1775 | cifs_dbg(FYI, "Domain name set\n"); |
8830d7e0 SP |
1776 | break; |
1777 | case Opt_srcaddr: | |
1778 | string = match_strdup(args); | |
1779 | if (string == NULL) | |
1780 | goto out_nomem; | |
1781 | ||
4fe9e963 | 1782 | if (!cifs_convert_address( |
8830d7e0 SP |
1783 | (struct sockaddr *)&vol->srcaddr, |
1784 | string, strlen(string))) { | |
0b456f04 AS |
1785 | pr_warn("CIFS: Could not parse srcaddr: %s\n", |
1786 | string); | |
8830d7e0 SP |
1787 | goto cifs_parse_mount_err; |
1788 | } | |
1789 | break; | |
8830d7e0 SP |
1790 | case Opt_iocharset: |
1791 | string = match_strdup(args); | |
1792 | if (string == NULL) | |
1793 | goto out_nomem; | |
1794 | ||
4fe9e963 | 1795 | if (strnlen(string, 1024) >= 65) { |
0b456f04 | 1796 | pr_warn("CIFS: iocharset name too long.\n"); |
8830d7e0 SP |
1797 | goto cifs_parse_mount_err; |
1798 | } | |
1799 | ||
87e747cd | 1800 | if (strncasecmp(string, "default", 7) != 0) { |
2bd50fb3 | 1801 | kfree(vol->iocharset); |
8830d7e0 SP |
1802 | vol->iocharset = kstrdup(string, |
1803 | GFP_KERNEL); | |
1804 | if (!vol->iocharset) { | |
0b456f04 | 1805 | pr_warn("CIFS: no memory for charset\n"); |
8830d7e0 SP |
1806 | goto cifs_parse_mount_err; |
1807 | } | |
1808 | } | |
1809 | /* if iocharset not set then load_nls_default | |
1810 | * is used by caller | |
1811 | */ | |
f96637be | 1812 | cifs_dbg(FYI, "iocharset set to %s\n", string); |
8830d7e0 | 1813 | break; |
8830d7e0 SP |
1814 | case Opt_netbiosname: |
1815 | string = match_strdup(args); | |
1816 | if (string == NULL) | |
1817 | goto out_nomem; | |
1818 | ||
8830d7e0 SP |
1819 | memset(vol->source_rfc1001_name, 0x20, |
1820 | RFC1001_NAME_LEN); | |
1821 | /* | |
1822 | * FIXME: are there cases in which a comma can | |
1823 | * be valid in workstation netbios name (and | |
1824 | * need special handling)? | |
1825 | */ | |
1826 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
1827 | /* don't ucase netbiosname for user */ | |
1828 | if (string[i] == 0) | |
1829 | break; | |
1830 | vol->source_rfc1001_name[i] = string[i]; | |
1831 | } | |
1832 | /* The string has 16th byte zero still from | |
1833 | * set at top of the function | |
1834 | */ | |
1835 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
0b456f04 | 1836 | pr_warn("CIFS: netbiosname longer than 15 truncated.\n"); |
8830d7e0 SP |
1837 | break; |
1838 | case Opt_servern: | |
1839 | /* servernetbiosname specified override *SMBSERVER */ | |
1840 | string = match_strdup(args); | |
1841 | if (string == NULL) | |
1842 | goto out_nomem; | |
1843 | ||
8830d7e0 SP |
1844 | /* last byte, type, is 0x20 for servr type */ |
1845 | memset(vol->target_rfc1001_name, 0x20, | |
1846 | RFC1001_NAME_LEN_WITH_NULL); | |
1847 | ||
1848 | /* BB are there cases in which a comma can be | |
1849 | valid in this workstation netbios name | |
1850 | (and need special handling)? */ | |
1851 | ||
1852 | /* user or mount helper must uppercase the | |
1853 | netbios name */ | |
1854 | for (i = 0; i < 15; i++) { | |
1855 | if (string[i] == 0) | |
1856 | break; | |
1857 | vol->target_rfc1001_name[i] = string[i]; | |
1858 | } | |
1859 | /* The string has 16th byte zero still from | |
1860 | set at top of the function */ | |
1861 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
0b456f04 | 1862 | pr_warn("CIFS: server netbiosname longer than 15 truncated.\n"); |
8830d7e0 SP |
1863 | break; |
1864 | case Opt_ver: | |
1865 | string = match_strdup(args); | |
1866 | if (string == NULL) | |
1867 | goto out_nomem; | |
1868 | ||
87e747cd | 1869 | if (strncasecmp(string, "1", 1) == 0) { |
8830d7e0 SP |
1870 | /* This is the default */ |
1871 | break; | |
1872 | } | |
1873 | /* For all other value, error */ | |
0b456f04 | 1874 | pr_warn("CIFS: Invalid version specified\n"); |
b946845a | 1875 | goto cifs_parse_mount_err; |
23db65f5 JL |
1876 | case Opt_vers: |
1877 | string = match_strdup(args); | |
1878 | if (string == NULL) | |
1879 | goto out_nomem; | |
1880 | ||
1881 | if (cifs_parse_smb_version(string, vol) != 0) | |
1882 | goto cifs_parse_mount_err; | |
1883 | break; | |
8830d7e0 SP |
1884 | case Opt_sec: |
1885 | string = match_strdup(args); | |
1886 | if (string == NULL) | |
1887 | goto out_nomem; | |
1888 | ||
8830d7e0 SP |
1889 | if (cifs_parse_security_flavors(string, vol) != 0) |
1890 | goto cifs_parse_mount_err; | |
1891 | break; | |
15b6a473 JL |
1892 | case Opt_cache: |
1893 | string = match_strdup(args); | |
1894 | if (string == NULL) | |
1895 | goto out_nomem; | |
1896 | ||
1897 | if (cifs_parse_cache_flavor(string, vol) != 0) | |
1898 | goto cifs_parse_mount_err; | |
1899 | break; | |
8830d7e0 | 1900 | default: |
d8162558 JL |
1901 | /* |
1902 | * An option we don't recognize. Save it off for later | |
1903 | * if we haven't already found one | |
1904 | */ | |
1905 | if (!invalid) | |
1906 | invalid = data; | |
8830d7e0 | 1907 | break; |
1da177e4 | 1908 | } |
8830d7e0 SP |
1909 | /* Free up any allocated string */ |
1910 | kfree(string); | |
1911 | string = NULL; | |
1da177e4 | 1912 | } |
0eb8a132 | 1913 | |
d8162558 | 1914 | if (!sloppy && invalid) { |
0b456f04 | 1915 | pr_err("CIFS: Unknown mount option \"%s\"\n", invalid); |
d8162558 JL |
1916 | goto cifs_parse_mount_err; |
1917 | } | |
1918 | ||
8a8798a5 JL |
1919 | #ifndef CONFIG_KEYS |
1920 | /* Muliuser mounts require CONFIG_KEYS support */ | |
1921 | if (vol->multiuser) { | |
f96637be | 1922 | cifs_dbg(VFS, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n"); |
b946845a | 1923 | goto cifs_parse_mount_err; |
0eb8a132 | 1924 | } |
8a8798a5 | 1925 | #endif |
e5e69abd | 1926 | if (!vol->UNC) { |
37d4f99b | 1927 | cifs_dbg(VFS, "CIFS mount error: No usable UNC path provided in device string!\n"); |
e5e69abd JL |
1928 | goto cifs_parse_mount_err; |
1929 | } | |
0eb8a132 | 1930 | |
62a1a439 JL |
1931 | /* make sure UNC has a share name */ |
1932 | if (!strchr(vol->UNC + 3, '\\')) { | |
f96637be | 1933 | cifs_dbg(VFS, "Malformed UNC. Unable to find share name.\n"); |
62a1a439 JL |
1934 | goto cifs_parse_mount_err; |
1935 | } | |
1936 | ||
b979aaa1 JL |
1937 | if (!got_ip) { |
1938 | /* No ip= option specified? Try to get it from UNC */ | |
1939 | if (!cifs_convert_address(dstaddr, &vol->UNC[2], | |
1940 | strlen(&vol->UNC[2]))) { | |
0b456f04 | 1941 | pr_err("Unable to determine destination address.\n"); |
b979aaa1 JL |
1942 | goto cifs_parse_mount_err; |
1943 | } | |
1944 | } | |
1945 | ||
1946 | /* set the port that we got earlier */ | |
1947 | cifs_set_port(dstaddr, port); | |
1da177e4 | 1948 | |
9b9d6b24 JL |
1949 | if (uid_specified) |
1950 | vol->override_uid = override_uid; | |
1951 | else if (override_uid == 1) | |
0b456f04 | 1952 | pr_notice("CIFS: ignoring forceuid mount option specified with no uid= option.\n"); |
9b9d6b24 JL |
1953 | |
1954 | if (gid_specified) | |
1955 | vol->override_gid = override_gid; | |
1956 | else if (override_gid == 1) | |
0b456f04 | 1957 | pr_notice("CIFS: ignoring forcegid mount option specified with no gid= option.\n"); |
9b9d6b24 | 1958 | |
b946845a | 1959 | kfree(mountdata_copy); |
1da177e4 | 1960 | return 0; |
b946845a | 1961 | |
8830d7e0 | 1962 | out_nomem: |
0b456f04 | 1963 | pr_warn("Could not allocate temporary buffer\n"); |
b946845a | 1964 | cifs_parse_mount_err: |
8830d7e0 | 1965 | kfree(string); |
b946845a SF |
1966 | kfree(mountdata_copy); |
1967 | return 1; | |
1da177e4 LT |
1968 | } |
1969 | ||
3eb9a889 BG |
1970 | /** Returns true if srcaddr isn't specified and rhs isn't |
1971 | * specified, or if srcaddr is specified and | |
1972 | * matches the IP address of the rhs argument. | |
1973 | */ | |
1974 | static bool | |
1975 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
1976 | { | |
1977 | switch (srcaddr->sa_family) { | |
1978 | case AF_UNSPEC: | |
1979 | return (rhs->sa_family == AF_UNSPEC); | |
1980 | case AF_INET: { | |
1981 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
1982 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
1983 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
1984 | } | |
1985 | case AF_INET6: { | |
1986 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
e3e2775c | 1987 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs; |
3eb9a889 BG |
1988 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); |
1989 | } | |
1990 | default: | |
1991 | WARN_ON(1); | |
1992 | return false; /* don't expect to be here */ | |
1993 | } | |
1994 | } | |
1995 | ||
4b886136 PS |
1996 | /* |
1997 | * If no port is specified in addr structure, we try to match with 445 port | |
1998 | * and if it fails - with 139 ports. It should be called only if address | |
1999 | * families of server and addr are equal. | |
2000 | */ | |
2001 | static bool | |
2002 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
2003 | { | |
6da97910 | 2004 | __be16 port, *sport; |
4b886136 PS |
2005 | |
2006 | switch (addr->sa_family) { | |
2007 | case AF_INET: | |
2008 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
2009 | port = ((struct sockaddr_in *) addr)->sin_port; | |
2010 | break; | |
2011 | case AF_INET6: | |
2012 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
2013 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
2014 | break; | |
2015 | default: | |
2016 | WARN_ON(1); | |
2017 | return false; | |
2018 | } | |
2019 | ||
2020 | if (!port) { | |
2021 | port = htons(CIFS_PORT); | |
2022 | if (port == *sport) | |
2023 | return true; | |
2024 | ||
2025 | port = htons(RFC1001_PORT); | |
2026 | } | |
2027 | ||
2028 | return port == *sport; | |
2029 | } | |
3eb9a889 | 2030 | |
4515148e | 2031 | static bool |
3eb9a889 BG |
2032 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
2033 | struct sockaddr *srcaddr) | |
4515148e | 2034 | { |
4515148e | 2035 | switch (addr->sa_family) { |
a9f1b85e PS |
2036 | case AF_INET: { |
2037 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
2038 | struct sockaddr_in *srv_addr4 = | |
2039 | (struct sockaddr_in *)&server->dstaddr; | |
2040 | ||
2041 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 2042 | return false; |
4515148e | 2043 | break; |
a9f1b85e PS |
2044 | } |
2045 | case AF_INET6: { | |
2046 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
2047 | struct sockaddr_in6 *srv_addr6 = | |
2048 | (struct sockaddr_in6 *)&server->dstaddr; | |
2049 | ||
4515148e | 2050 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 2051 | &srv_addr6->sin6_addr)) |
4515148e | 2052 | return false; |
a9f1b85e | 2053 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 2054 | return false; |
4515148e JL |
2055 | break; |
2056 | } | |
a9f1b85e PS |
2057 | default: |
2058 | WARN_ON(1); | |
2059 | return false; /* don't expect to be here */ | |
2060 | } | |
4515148e | 2061 | |
3eb9a889 BG |
2062 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
2063 | return false; | |
2064 | ||
4515148e JL |
2065 | return true; |
2066 | } | |
2067 | ||
daf5b0b6 JL |
2068 | static bool |
2069 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
2070 | { | |
3f618223 JL |
2071 | /* |
2072 | * The select_sectype function should either return the vol->sectype | |
2073 | * that was specified, or "Unspecified" if that sectype was not | |
2074 | * compatible with the given NEGOTIATE request. | |
2075 | */ | |
2076 | if (select_sectype(server, vol->sectype) == Unspecified) | |
daf5b0b6 | 2077 | return false; |
daf5b0b6 | 2078 | |
3f618223 JL |
2079 | /* |
2080 | * Now check if signing mode is acceptable. No need to check | |
2081 | * global_secflags at this point since if MUST_SIGN is set then | |
2082 | * the server->sign had better be too. | |
2083 | */ | |
38d77c50 JL |
2084 | if (vol->sign && !server->sign) |
2085 | return false; | |
daf5b0b6 JL |
2086 | |
2087 | return true; | |
2088 | } | |
2089 | ||
9fa114f7 | 2090 | static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol) |
37bb04e5 | 2091 | { |
9fa114f7 JL |
2092 | struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr; |
2093 | ||
a0b3df5c JL |
2094 | if (vol->nosharesock) |
2095 | return 0; | |
2096 | ||
23db65f5 JL |
2097 | if ((server->vals != vol->vals) || (server->ops != vol->ops)) |
2098 | return 0; | |
2099 | ||
37bb04e5 PS |
2100 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) |
2101 | return 0; | |
2102 | ||
2103 | if (!match_address(server, addr, | |
2104 | (struct sockaddr *)&vol->srcaddr)) | |
2105 | return 0; | |
2106 | ||
2107 | if (!match_port(server, addr)) | |
2108 | return 0; | |
2109 | ||
2110 | if (!match_security(server, vol)) | |
2111 | return 0; | |
2112 | ||
b782fcc1 | 2113 | if (server->echo_interval != vol->echo_interval * HZ) |
adfeb3e0 SF |
2114 | return 0; |
2115 | ||
37bb04e5 PS |
2116 | return 1; |
2117 | } | |
2118 | ||
e7ddee90 | 2119 | static struct TCP_Server_Info * |
9fa114f7 | 2120 | cifs_find_tcp_session(struct smb_vol *vol) |
1da177e4 | 2121 | { |
e7ddee90 | 2122 | struct TCP_Server_Info *server; |
e7ddee90 | 2123 | |
3f9bcca7 | 2124 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 2125 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
9fa114f7 | 2126 | if (!match_server(server, vol)) |
daf5b0b6 JL |
2127 | continue; |
2128 | ||
e7ddee90 | 2129 | ++server->srv_count; |
3f9bcca7 | 2130 | spin_unlock(&cifs_tcp_ses_lock); |
f96637be | 2131 | cifs_dbg(FYI, "Existing tcp session with server found\n"); |
e7ddee90 | 2132 | return server; |
1da177e4 | 2133 | } |
3f9bcca7 | 2134 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2135 | return NULL; |
2136 | } | |
1b20d672 | 2137 | |
53e0e11e PS |
2138 | void |
2139 | cifs_put_tcp_session(struct TCP_Server_Info *server, int from_reconnect) | |
1da177e4 | 2140 | { |
a5c3e1c7 SF |
2141 | struct task_struct *task; |
2142 | ||
3f9bcca7 | 2143 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 2144 | if (--server->srv_count > 0) { |
3f9bcca7 | 2145 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 2146 | return; |
1da177e4 | 2147 | } |
1b20d672 | 2148 | |
f1d0c998 RL |
2149 | put_net(cifs_net_ns(server)); |
2150 | ||
e7ddee90 | 2151 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 2152 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2153 | |
c74093b6 JL |
2154 | cancel_delayed_work_sync(&server->echo); |
2155 | ||
53e0e11e PS |
2156 | #ifdef CONFIG_CIFS_SMB2 |
2157 | if (from_reconnect) | |
2158 | /* | |
2159 | * Avoid deadlock here: reconnect work calls | |
2160 | * cifs_put_tcp_session() at its end. Need to be sure | |
2161 | * that reconnect work does nothing with server pointer after | |
2162 | * that step. | |
2163 | */ | |
2164 | cancel_delayed_work(&server->reconnect); | |
2165 | else | |
2166 | cancel_delayed_work_sync(&server->reconnect); | |
2167 | #endif | |
2168 | ||
e7ddee90 JL |
2169 | spin_lock(&GlobalMid_Lock); |
2170 | server->tcpStatus = CifsExiting; | |
2171 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 2172 | |
026e93dc | 2173 | cifs_crypto_secmech_release(server); |
488f1d2d SJ |
2174 | cifs_fscache_release_client_cookie(server); |
2175 | ||
21e73393 SP |
2176 | kfree(server->session_key.response); |
2177 | server->session_key.response = NULL; | |
2178 | server->session_key.len = 0; | |
a5c3e1c7 SF |
2179 | |
2180 | task = xchg(&server->tsk, NULL); | |
2181 | if (task) | |
2182 | force_sig(SIGKILL, task); | |
1da177e4 LT |
2183 | } |
2184 | ||
63c038c2 JL |
2185 | static struct TCP_Server_Info * |
2186 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
2187 | { | |
2188 | struct TCP_Server_Info *tcp_ses = NULL; | |
63c038c2 JL |
2189 | int rc; |
2190 | ||
f96637be | 2191 | cifs_dbg(FYI, "UNC: %s\n", volume_info->UNC); |
63c038c2 JL |
2192 | |
2193 | /* see if we already have a matching tcp_ses */ | |
9fa114f7 | 2194 | tcp_ses = cifs_find_tcp_session(volume_info); |
63c038c2 JL |
2195 | if (tcp_ses) |
2196 | return tcp_ses; | |
2197 | ||
2198 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
2199 | if (!tcp_ses) { | |
2200 | rc = -ENOMEM; | |
2201 | goto out_err; | |
2202 | } | |
2203 | ||
23db65f5 JL |
2204 | tcp_ses->ops = volume_info->ops; |
2205 | tcp_ses->vals = volume_info->vals; | |
f1d0c998 | 2206 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
2207 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
2208 | if (IS_ERR(tcp_ses->hostname)) { | |
2209 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 2210 | goto out_err_crypto_release; |
63c038c2 JL |
2211 | } |
2212 | ||
2213 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
2214 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 2215 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
fc40f9cf | 2216 | tcp_ses->in_flight = 0; |
2d86dbc9 | 2217 | tcp_ses->credits = 1; |
63c038c2 JL |
2218 | init_waitqueue_head(&tcp_ses->response_q); |
2219 | init_waitqueue_head(&tcp_ses->request_q); | |
2220 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
2221 | mutex_init(&tcp_ses->srv_mutex); | |
2222 | memcpy(tcp_ses->workstation_RFC1001_name, | |
2223 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
2224 | memcpy(tcp_ses->server_RFC1001_name, | |
2225 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 2226 | tcp_ses->session_estab = false; |
63c038c2 | 2227 | tcp_ses->sequence_number = 0; |
fda35943 | 2228 | tcp_ses->lstrp = jiffies; |
58fa015f | 2229 | spin_lock_init(&tcp_ses->req_lock); |
63c038c2 JL |
2230 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
2231 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 2232 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
53e0e11e PS |
2233 | #ifdef CONFIG_CIFS_SMB2 |
2234 | INIT_DELAYED_WORK(&tcp_ses->reconnect, smb2_reconnect_server); | |
2235 | mutex_init(&tcp_ses->reconnect_mutex); | |
2236 | #endif | |
9fa114f7 JL |
2237 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
2238 | sizeof(tcp_ses->srcaddr)); | |
2239 | memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr, | |
2240 | sizeof(tcp_ses->dstaddr)); | |
39552ea8 | 2241 | #ifdef CONFIG_CIFS_SMB2 |
fa70b87c | 2242 | generate_random_uuid(tcp_ses->client_guid); |
39552ea8 | 2243 | #endif |
63c038c2 JL |
2244 | /* |
2245 | * at this point we are the only ones with the pointer | |
2246 | * to the struct since the kernel thread not created yet | |
2247 | * no need to spinlock this init of tcpStatus or srv_count | |
2248 | */ | |
2249 | tcp_ses->tcpStatus = CifsNew; | |
2250 | ++tcp_ses->srv_count; | |
2251 | ||
adfeb3e0 SF |
2252 | if (volume_info->echo_interval >= SMB_ECHO_INTERVAL_MIN && |
2253 | volume_info->echo_interval <= SMB_ECHO_INTERVAL_MAX) | |
2254 | tcp_ses->echo_interval = volume_info->echo_interval * HZ; | |
2255 | else | |
2256 | tcp_ses->echo_interval = SMB_ECHO_INTERVAL_DEFAULT * HZ; | |
2257 | ||
a9f1b85e | 2258 | rc = ip_connect(tcp_ses); |
63c038c2 | 2259 | if (rc < 0) { |
f96637be | 2260 | cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n"); |
f7c5445a | 2261 | goto out_err_crypto_release; |
63c038c2 JL |
2262 | } |
2263 | ||
2264 | /* | |
2265 | * since we're in a cifs function already, we know that | |
2266 | * this will succeed. No need for try_module_get(). | |
2267 | */ | |
2268 | __module_get(THIS_MODULE); | |
7c97c200 | 2269 | tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, |
63c038c2 JL |
2270 | tcp_ses, "cifsd"); |
2271 | if (IS_ERR(tcp_ses->tsk)) { | |
2272 | rc = PTR_ERR(tcp_ses->tsk); | |
f96637be | 2273 | cifs_dbg(VFS, "error %d create cifsd thread\n", rc); |
63c038c2 | 2274 | module_put(THIS_MODULE); |
f7c5445a | 2275 | goto out_err_crypto_release; |
63c038c2 | 2276 | } |
fd88ce93 | 2277 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
63c038c2 JL |
2278 | |
2279 | /* thread spawned, put it on the list */ | |
3f9bcca7 | 2280 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 2281 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 2282 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 2283 | |
488f1d2d SJ |
2284 | cifs_fscache_get_client_cookie(tcp_ses); |
2285 | ||
c74093b6 | 2286 | /* queue echo request delayed work */ |
adfeb3e0 | 2287 | queue_delayed_work(cifsiod_wq, &tcp_ses->echo, tcp_ses->echo_interval); |
c74093b6 | 2288 | |
63c038c2 JL |
2289 | return tcp_ses; |
2290 | ||
f7c5445a | 2291 | out_err_crypto_release: |
026e93dc | 2292 | cifs_crypto_secmech_release(tcp_ses); |
d2b91521 | 2293 | |
f1d0c998 RL |
2294 | put_net(cifs_net_ns(tcp_ses)); |
2295 | ||
63c038c2 JL |
2296 | out_err: |
2297 | if (tcp_ses) { | |
8347a5cd SF |
2298 | if (!IS_ERR(tcp_ses->hostname)) |
2299 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
2300 | if (tcp_ses->ssocket) |
2301 | sock_release(tcp_ses->ssocket); | |
2302 | kfree(tcp_ses); | |
2303 | } | |
2304 | return ERR_PTR(rc); | |
2305 | } | |
2306 | ||
96daf2b0 | 2307 | static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
37bb04e5 | 2308 | { |
3f618223 JL |
2309 | if (vol->sectype != Unspecified && |
2310 | vol->sectype != ses->sectype) | |
2311 | return 0; | |
2312 | ||
2313 | switch (ses->sectype) { | |
37bb04e5 | 2314 | case Kerberos: |
64ed39dd | 2315 | if (!uid_eq(vol->cred_uid, ses->cred_uid)) |
37bb04e5 PS |
2316 | return 0; |
2317 | break; | |
2318 | default: | |
04febabc JL |
2319 | /* NULL username means anonymous session */ |
2320 | if (ses->user_name == NULL) { | |
2321 | if (!vol->nullauth) | |
2322 | return 0; | |
2323 | break; | |
2324 | } | |
2325 | ||
37bb04e5 | 2326 | /* anything else takes username/password */ |
04febabc JL |
2327 | if (strncmp(ses->user_name, |
2328 | vol->username ? vol->username : "", | |
8c3a2b4c | 2329 | CIFS_MAX_USERNAME_LEN)) |
37bb04e5 | 2330 | return 0; |
08b37d51 | 2331 | if ((vol->username && strlen(vol->username) != 0) && |
37bb04e5 PS |
2332 | ses->password != NULL && |
2333 | strncmp(ses->password, | |
2334 | vol->password ? vol->password : "", | |
8c3a2b4c | 2335 | CIFS_MAX_PASSWORD_LEN)) |
37bb04e5 PS |
2336 | return 0; |
2337 | } | |
2338 | return 1; | |
2339 | } | |
2340 | ||
96daf2b0 | 2341 | static struct cifs_ses * |
4ff67b72 | 2342 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 2343 | { |
96daf2b0 | 2344 | struct cifs_ses *ses; |
dea570e0 | 2345 | |
3f9bcca7 | 2346 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 | 2347 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
7f48558e SP |
2348 | if (ses->status == CifsExiting) |
2349 | continue; | |
37bb04e5 PS |
2350 | if (!match_session(ses, vol)) |
2351 | continue; | |
14fbf50d | 2352 | ++ses->ses_count; |
3f9bcca7 | 2353 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2354 | return ses; |
2355 | } | |
3f9bcca7 | 2356 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2357 | return NULL; |
2358 | } | |
dea570e0 | 2359 | |
14fbf50d | 2360 | static void |
96daf2b0 | 2361 | cifs_put_smb_ses(struct cifs_ses *ses) |
14fbf50d | 2362 | { |
7f48558e | 2363 | unsigned int rc, xid; |
14fbf50d | 2364 | struct TCP_Server_Info *server = ses->server; |
dea570e0 | 2365 | |
f96637be | 2366 | cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count); |
7f48558e | 2367 | |
3f9bcca7 | 2368 | spin_lock(&cifs_tcp_ses_lock); |
7f48558e SP |
2369 | if (ses->status == CifsExiting) { |
2370 | spin_unlock(&cifs_tcp_ses_lock); | |
2371 | return; | |
2372 | } | |
14fbf50d | 2373 | if (--ses->ses_count > 0) { |
3f9bcca7 | 2374 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2375 | return; |
2376 | } | |
7f48558e SP |
2377 | if (ses->status == CifsGood) |
2378 | ses->status = CifsExiting; | |
3f9bcca7 | 2379 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2380 | |
7f48558e | 2381 | if (ses->status == CifsExiting && server->ops->logoff) { |
6d5786a3 | 2382 | xid = get_xid(); |
7f48558e SP |
2383 | rc = server->ops->logoff(xid, ses); |
2384 | if (rc) | |
2385 | cifs_dbg(VFS, "%s: Session Logoff failure rc=%d\n", | |
2386 | __func__, rc); | |
6d5786a3 | 2387 | _free_xid(xid); |
14fbf50d | 2388 | } |
7f48558e SP |
2389 | |
2390 | spin_lock(&cifs_tcp_ses_lock); | |
2391 | list_del_init(&ses->smb_ses_list); | |
2392 | spin_unlock(&cifs_tcp_ses_lock); | |
2393 | ||
14fbf50d | 2394 | sesInfoFree(ses); |
53e0e11e | 2395 | cifs_put_tcp_session(server, 0); |
14fbf50d | 2396 | } |
dea570e0 | 2397 | |
8a8798a5 JL |
2398 | #ifdef CONFIG_KEYS |
2399 | ||
057d6332 CG |
2400 | /* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */ |
2401 | #define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1) | |
8a8798a5 JL |
2402 | |
2403 | /* Populate username and pw fields from keyring if possible */ | |
2404 | static int | |
2405 | cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) | |
2406 | { | |
2407 | int rc = 0; | |
146aa8b1 DH |
2408 | const char *delim, *payload; |
2409 | char *desc; | |
8a8798a5 JL |
2410 | ssize_t len; |
2411 | struct key *key; | |
2412 | struct TCP_Server_Info *server = ses->server; | |
2413 | struct sockaddr_in *sa; | |
2414 | struct sockaddr_in6 *sa6; | |
146aa8b1 | 2415 | const struct user_key_payload *upayload; |
8a8798a5 JL |
2416 | |
2417 | desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL); | |
2418 | if (!desc) | |
2419 | return -ENOMEM; | |
2420 | ||
2421 | /* try to find an address key first */ | |
2422 | switch (server->dstaddr.ss_family) { | |
2423 | case AF_INET: | |
2424 | sa = (struct sockaddr_in *)&server->dstaddr; | |
2425 | sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr); | |
2426 | break; | |
2427 | case AF_INET6: | |
2428 | sa6 = (struct sockaddr_in6 *)&server->dstaddr; | |
2429 | sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr); | |
2430 | break; | |
2431 | default: | |
f96637be JP |
2432 | cifs_dbg(FYI, "Bad ss_family (%hu)\n", |
2433 | server->dstaddr.ss_family); | |
8a8798a5 JL |
2434 | rc = -EINVAL; |
2435 | goto out_err; | |
2436 | } | |
2437 | ||
f96637be | 2438 | cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
8a8798a5 JL |
2439 | key = request_key(&key_type_logon, desc, ""); |
2440 | if (IS_ERR(key)) { | |
2441 | if (!ses->domainName) { | |
f96637be | 2442 | cifs_dbg(FYI, "domainName is NULL\n"); |
8a8798a5 JL |
2443 | rc = PTR_ERR(key); |
2444 | goto out_err; | |
2445 | } | |
2446 | ||
2447 | /* didn't work, try to find a domain key */ | |
2448 | sprintf(desc, "cifs:d:%s", ses->domainName); | |
f96637be | 2449 | cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
8a8798a5 JL |
2450 | key = request_key(&key_type_logon, desc, ""); |
2451 | if (IS_ERR(key)) { | |
2452 | rc = PTR_ERR(key); | |
2453 | goto out_err; | |
2454 | } | |
2455 | } | |
2456 | ||
2457 | down_read(&key->sem); | |
0837e49a | 2458 | upayload = user_key_payload_locked(key); |
8a8798a5 | 2459 | if (IS_ERR_OR_NULL(upayload)) { |
4edc53c1 | 2460 | rc = upayload ? PTR_ERR(upayload) : -EINVAL; |
8a8798a5 JL |
2461 | goto out_key_put; |
2462 | } | |
2463 | ||
2464 | /* find first : in payload */ | |
146aa8b1 | 2465 | payload = upayload->data; |
8a8798a5 | 2466 | delim = strnchr(payload, upayload->datalen, ':'); |
f96637be | 2467 | cifs_dbg(FYI, "payload=%s\n", payload); |
8a8798a5 | 2468 | if (!delim) { |
f96637be JP |
2469 | cifs_dbg(FYI, "Unable to find ':' in payload (datalen=%d)\n", |
2470 | upayload->datalen); | |
8a8798a5 JL |
2471 | rc = -EINVAL; |
2472 | goto out_key_put; | |
2473 | } | |
2474 | ||
2475 | len = delim - payload; | |
8c3a2b4c | 2476 | if (len > CIFS_MAX_USERNAME_LEN || len <= 0) { |
f96637be JP |
2477 | cifs_dbg(FYI, "Bad value from username search (len=%zd)\n", |
2478 | len); | |
8a8798a5 JL |
2479 | rc = -EINVAL; |
2480 | goto out_key_put; | |
2481 | } | |
2482 | ||
2483 | vol->username = kstrndup(payload, len, GFP_KERNEL); | |
2484 | if (!vol->username) { | |
f96637be JP |
2485 | cifs_dbg(FYI, "Unable to allocate %zd bytes for username\n", |
2486 | len); | |
8a8798a5 JL |
2487 | rc = -ENOMEM; |
2488 | goto out_key_put; | |
2489 | } | |
f96637be | 2490 | cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username); |
8a8798a5 JL |
2491 | |
2492 | len = key->datalen - (len + 1); | |
8c3a2b4c | 2493 | if (len > CIFS_MAX_PASSWORD_LEN || len <= 0) { |
f96637be | 2494 | cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len); |
8a8798a5 JL |
2495 | rc = -EINVAL; |
2496 | kfree(vol->username); | |
2497 | vol->username = NULL; | |
2498 | goto out_key_put; | |
2499 | } | |
2500 | ||
2501 | ++delim; | |
2502 | vol->password = kstrndup(delim, len, GFP_KERNEL); | |
2503 | if (!vol->password) { | |
f96637be JP |
2504 | cifs_dbg(FYI, "Unable to allocate %zd bytes for password\n", |
2505 | len); | |
8a8798a5 JL |
2506 | rc = -ENOMEM; |
2507 | kfree(vol->username); | |
2508 | vol->username = NULL; | |
2509 | goto out_key_put; | |
2510 | } | |
2511 | ||
2512 | out_key_put: | |
2513 | up_read(&key->sem); | |
2514 | key_put(key); | |
2515 | out_err: | |
2516 | kfree(desc); | |
f96637be | 2517 | cifs_dbg(FYI, "%s: returning %d\n", __func__, rc); |
8a8798a5 JL |
2518 | return rc; |
2519 | } | |
2520 | #else /* ! CONFIG_KEYS */ | |
2521 | static inline int | |
2522 | cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), | |
2523 | struct cifs_ses *ses __attribute__((unused))) | |
2524 | { | |
2525 | return -ENOSYS; | |
2526 | } | |
2527 | #endif /* CONFIG_KEYS */ | |
2528 | ||
96daf2b0 | 2529 | static struct cifs_ses * |
36988c76 JL |
2530 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
2531 | { | |
286170aa PS |
2532 | int rc = -ENOMEM; |
2533 | unsigned int xid; | |
96daf2b0 | 2534 | struct cifs_ses *ses; |
a9f1b85e PS |
2535 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
2536 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 | 2537 | |
6d5786a3 | 2538 | xid = get_xid(); |
36988c76 | 2539 | |
4ff67b72 | 2540 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 | 2541 | if (ses) { |
f96637be JP |
2542 | cifs_dbg(FYI, "Existing smb sess found (status=%d)\n", |
2543 | ses->status); | |
36988c76 | 2544 | |
36988c76 | 2545 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
2546 | rc = cifs_negotiate_protocol(xid, ses); |
2547 | if (rc) { | |
2548 | mutex_unlock(&ses->session_mutex); | |
2549 | /* problem -- put our ses reference */ | |
2550 | cifs_put_smb_ses(ses); | |
6d5786a3 | 2551 | free_xid(xid); |
198b5682 JL |
2552 | return ERR_PTR(rc); |
2553 | } | |
36988c76 | 2554 | if (ses->need_reconnect) { |
f96637be | 2555 | cifs_dbg(FYI, "Session needs reconnect\n"); |
36988c76 JL |
2556 | rc = cifs_setup_session(xid, ses, |
2557 | volume_info->local_nls); | |
2558 | if (rc) { | |
2559 | mutex_unlock(&ses->session_mutex); | |
2560 | /* problem -- put our reference */ | |
2561 | cifs_put_smb_ses(ses); | |
6d5786a3 | 2562 | free_xid(xid); |
36988c76 JL |
2563 | return ERR_PTR(rc); |
2564 | } | |
2565 | } | |
2566 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
2567 | |
2568 | /* existing SMB ses has a server reference already */ | |
53e0e11e | 2569 | cifs_put_tcp_session(server, 0); |
6d5786a3 | 2570 | free_xid(xid); |
36988c76 JL |
2571 | return ses; |
2572 | } | |
2573 | ||
f96637be | 2574 | cifs_dbg(FYI, "Existing smb sess not found\n"); |
36988c76 JL |
2575 | ses = sesInfoAlloc(); |
2576 | if (ses == NULL) | |
2577 | goto get_ses_fail; | |
2578 | ||
2579 | /* new SMB session uses our server ref */ | |
2580 | ses->server = server; | |
a9f1b85e PS |
2581 | if (server->dstaddr.ss_family == AF_INET6) |
2582 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 2583 | else |
a9f1b85e | 2584 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 2585 | |
8727c8a8 SF |
2586 | if (volume_info->username) { |
2587 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
2588 | if (!ses->user_name) | |
2589 | goto get_ses_fail; | |
2590 | } | |
36988c76 JL |
2591 | |
2592 | /* volume_info->password freed at unmount */ | |
2593 | if (volume_info->password) { | |
2594 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2595 | if (!ses->password) | |
2596 | goto get_ses_fail; | |
2597 | } | |
2598 | if (volume_info->domainname) { | |
d3686d54 SP |
2599 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
2600 | if (!ses->domainName) | |
2601 | goto get_ses_fail; | |
36988c76 | 2602 | } |
39566443 GP |
2603 | if (volume_info->domainauto) |
2604 | ses->domainAuto = volume_info->domainauto; | |
3e4b3e1f | 2605 | ses->cred_uid = volume_info->cred_uid; |
36988c76 | 2606 | ses->linux_uid = volume_info->linux_uid; |
d9b94201 | 2607 | |
28e11bd8 JL |
2608 | ses->sectype = volume_info->sectype; |
2609 | ses->sign = volume_info->sign; | |
36988c76 JL |
2610 | |
2611 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
2612 | rc = cifs_negotiate_protocol(xid, ses); |
2613 | if (!rc) | |
2614 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 2615 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 2616 | if (rc) |
36988c76 JL |
2617 | goto get_ses_fail; |
2618 | ||
2619 | /* success, put it on the list */ | |
3f9bcca7 | 2620 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 2621 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 2622 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 | 2623 | |
6d5786a3 | 2624 | free_xid(xid); |
36988c76 JL |
2625 | return ses; |
2626 | ||
2627 | get_ses_fail: | |
2628 | sesInfoFree(ses); | |
6d5786a3 | 2629 | free_xid(xid); |
36988c76 JL |
2630 | return ERR_PTR(rc); |
2631 | } | |
2632 | ||
ae6f8dd4 | 2633 | static int match_tcon(struct cifs_tcon *tcon, struct smb_vol *volume_info) |
37bb04e5 PS |
2634 | { |
2635 | if (tcon->tidStatus == CifsExiting) | |
2636 | return 0; | |
ae6f8dd4 | 2637 | if (strncmp(tcon->treeName, volume_info->UNC, MAX_TREE_SIZE)) |
37bb04e5 | 2638 | return 0; |
ae6f8dd4 PS |
2639 | if (tcon->seal != volume_info->seal) |
2640 | return 0; | |
2641 | #ifdef CONFIG_CIFS_SMB2 | |
2642 | if (tcon->snapshot_time != volume_info->snapshot_time) | |
2643 | return 0; | |
2644 | #endif /* CONFIG_CIFS_SMB2 */ | |
37bb04e5 PS |
2645 | return 1; |
2646 | } | |
2647 | ||
96daf2b0 | 2648 | static struct cifs_tcon * |
8b217fe7 | 2649 | cifs_find_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) |
f1987b44 JL |
2650 | { |
2651 | struct list_head *tmp; | |
96daf2b0 | 2652 | struct cifs_tcon *tcon; |
f1987b44 | 2653 | |
3f9bcca7 | 2654 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2655 | list_for_each(tmp, &ses->tcon_list) { |
96daf2b0 | 2656 | tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
ae6f8dd4 | 2657 | if (!match_tcon(tcon, volume_info)) |
f1987b44 | 2658 | continue; |
f1987b44 | 2659 | ++tcon->tc_count; |
3f9bcca7 | 2660 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2661 | return tcon; |
1da177e4 | 2662 | } |
3f9bcca7 | 2663 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2664 | return NULL; |
2665 | } | |
2666 | ||
53e0e11e | 2667 | void |
96daf2b0 | 2668 | cifs_put_tcon(struct cifs_tcon *tcon) |
f1987b44 | 2669 | { |
2e6e02ab | 2670 | unsigned int xid; |
96daf2b0 | 2671 | struct cifs_ses *ses = tcon->ses; |
f1987b44 | 2672 | |
f96637be | 2673 | cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
3f9bcca7 | 2674 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2675 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 2676 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2677 | return; |
2678 | } | |
2679 | ||
2680 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 2681 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 | 2682 | |
6d5786a3 | 2683 | xid = get_xid(); |
2e6e02ab PS |
2684 | if (ses->server->ops->tree_disconnect) |
2685 | ses->server->ops->tree_disconnect(xid, tcon); | |
6d5786a3 | 2686 | _free_xid(xid); |
f1987b44 | 2687 | |
d03382ce | 2688 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 2689 | tconInfoFree(tcon); |
f1987b44 JL |
2690 | cifs_put_smb_ses(ses); |
2691 | } | |
2692 | ||
96daf2b0 SF |
2693 | static struct cifs_tcon * |
2694 | cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) | |
d00c28de JL |
2695 | { |
2696 | int rc, xid; | |
96daf2b0 | 2697 | struct cifs_tcon *tcon; |
d00c28de | 2698 | |
8b217fe7 | 2699 | tcon = cifs_find_tcon(ses, volume_info); |
d00c28de | 2700 | if (tcon) { |
f96637be | 2701 | cifs_dbg(FYI, "Found match on UNC path\n"); |
d00c28de JL |
2702 | /* existing tcon already has a reference */ |
2703 | cifs_put_smb_ses(ses); | |
d00c28de JL |
2704 | return tcon; |
2705 | } | |
2706 | ||
2e6e02ab PS |
2707 | if (!ses->server->ops->tree_connect) { |
2708 | rc = -ENOSYS; | |
2709 | goto out_fail; | |
2710 | } | |
2711 | ||
d00c28de JL |
2712 | tcon = tconInfoAlloc(); |
2713 | if (tcon == NULL) { | |
2714 | rc = -ENOMEM; | |
2715 | goto out_fail; | |
2716 | } | |
2717 | ||
8b217fe7 SF |
2718 | if (volume_info->snapshot_time) { |
2719 | #ifdef CONFIG_CIFS_SMB2 | |
2720 | if (ses->server->vals->protocol_id == 0) { | |
2721 | cifs_dbg(VFS, | |
2722 | "Use SMB2 or later for snapshot mount option\n"); | |
2723 | rc = -EOPNOTSUPP; | |
2724 | goto out_fail; | |
2725 | } else | |
2726 | tcon->snapshot_time = volume_info->snapshot_time; | |
2727 | #else | |
2728 | cifs_dbg(VFS, "Snapshot mount option requires SMB2 support\n"); | |
2729 | rc = -EOPNOTSUPP; | |
2730 | goto out_fail; | |
2731 | #endif /* CONFIG_CIFS_SMB2 */ | |
2732 | } | |
2733 | ||
d00c28de JL |
2734 | tcon->ses = ses; |
2735 | if (volume_info->password) { | |
2736 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2737 | if (!tcon->password) { | |
2738 | rc = -ENOMEM; | |
2739 | goto out_fail; | |
2740 | } | |
2741 | } | |
2742 | ||
2e6e02ab PS |
2743 | /* |
2744 | * BB Do we need to wrap session_mutex around this TCon call and Unix | |
2745 | * SetFS as we do on SessSetup and reconnect? | |
2746 | */ | |
6d5786a3 | 2747 | xid = get_xid(); |
2e6e02ab PS |
2748 | rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon, |
2749 | volume_info->local_nls); | |
6d5786a3 | 2750 | free_xid(xid); |
f96637be | 2751 | cifs_dbg(FYI, "Tcon rc = %d\n", rc); |
d00c28de JL |
2752 | if (rc) |
2753 | goto out_fail; | |
2754 | ||
2755 | if (volume_info->nodfs) { | |
2756 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
f96637be | 2757 | cifs_dbg(FYI, "DFS disabled (%d)\n", tcon->Flags); |
d00c28de | 2758 | } |
b618f001 SF |
2759 | tcon->use_persistent = false; |
2760 | /* check if SMB2 or later, CIFS does not support persistent handles */ | |
2761 | if (volume_info->persistent) { | |
2762 | if (ses->server->vals->protocol_id == 0) { | |
2763 | cifs_dbg(VFS, | |
2764 | "SMB3 or later required for persistent handles\n"); | |
2765 | rc = -EOPNOTSUPP; | |
2766 | goto out_fail; | |
592fafe6 | 2767 | #ifdef CONFIG_CIFS_SMB2 |
b618f001 SF |
2768 | } else if (ses->server->capabilities & |
2769 | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) | |
2770 | tcon->use_persistent = true; | |
2771 | else /* persistent handles requested but not supported */ { | |
2772 | cifs_dbg(VFS, | |
2773 | "Persistent handles not supported on share\n"); | |
2774 | rc = -EOPNOTSUPP; | |
2775 | goto out_fail; | |
592fafe6 | 2776 | #endif /* CONFIG_CIFS_SMB2 */ |
b618f001 | 2777 | } |
592fafe6 | 2778 | #ifdef CONFIG_CIFS_SMB2 |
b618f001 SF |
2779 | } else if ((tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) |
2780 | && (ses->server->capabilities & SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) | |
2781 | && (volume_info->nopersistent == false)) { | |
2782 | cifs_dbg(FYI, "enabling persistent handles\n"); | |
2783 | tcon->use_persistent = true; | |
592fafe6 SF |
2784 | #endif /* CONFIG_CIFS_SMB2 */ |
2785 | } else if (volume_info->resilient) { | |
2786 | if (ses->server->vals->protocol_id == 0) { | |
2787 | cifs_dbg(VFS, | |
2788 | "SMB2.1 or later required for resilient handles\n"); | |
2789 | rc = -EOPNOTSUPP; | |
2790 | goto out_fail; | |
2791 | } | |
2792 | tcon->use_resilient = true; | |
b618f001 SF |
2793 | } |
2794 | ||
ae6f8dd4 PS |
2795 | if (volume_info->seal) { |
2796 | if (ses->server->vals->protocol_id == 0) { | |
2797 | cifs_dbg(VFS, | |
2798 | "SMB3 or later required for encryption\n"); | |
2799 | rc = -EOPNOTSUPP; | |
2800 | goto out_fail; | |
2801 | #ifdef CONFIG_CIFS_SMB2 | |
2802 | } else if (tcon->ses->server->capabilities & | |
2803 | SMB2_GLOBAL_CAP_ENCRYPTION) | |
2804 | tcon->seal = true; | |
2805 | else { | |
2806 | cifs_dbg(VFS, "Encryption is not supported on share\n"); | |
2807 | rc = -EOPNOTSUPP; | |
2808 | goto out_fail; | |
2809 | #endif /* CONFIG_CIFS_SMB2 */ | |
2810 | } | |
2811 | } | |
2812 | ||
2e6e02ab PS |
2813 | /* |
2814 | * We can have only one retry value for a connection to a share so for | |
2815 | * resources mounted more than once to the same server share the last | |
2816 | * value passed in for the retry flag is used. | |
2817 | */ | |
d00c28de JL |
2818 | tcon->retry = volume_info->retry; |
2819 | tcon->nocase = volume_info->nocase; | |
2820 | tcon->local_lease = volume_info->local_lease; | |
233839b1 | 2821 | INIT_LIST_HEAD(&tcon->pending_opens); |
d00c28de | 2822 | |
3f9bcca7 | 2823 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 2824 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 2825 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 2826 | |
d03382ce SJ |
2827 | cifs_fscache_get_super_cookie(tcon); |
2828 | ||
d00c28de JL |
2829 | return tcon; |
2830 | ||
2831 | out_fail: | |
2832 | tconInfoFree(tcon); | |
2833 | return ERR_PTR(rc); | |
2834 | } | |
2835 | ||
9d002df4 JL |
2836 | void |
2837 | cifs_put_tlink(struct tcon_link *tlink) | |
2838 | { | |
2839 | if (!tlink || IS_ERR(tlink)) | |
2840 | return; | |
2841 | ||
2842 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
2843 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
2844 | tlink->tl_time = jiffies; | |
2845 | return; | |
2846 | } | |
2847 | ||
2848 | if (!IS_ERR(tlink_tcon(tlink))) | |
2849 | cifs_put_tcon(tlink_tcon(tlink)); | |
2850 | kfree(tlink); | |
2851 | return; | |
2852 | } | |
d00c28de | 2853 | |
25c7f41e | 2854 | static inline struct tcon_link * |
cd51875d PS |
2855 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
2856 | { | |
2857 | return cifs_sb->master_tlink; | |
2858 | } | |
25c7f41e PS |
2859 | |
2860 | static int | |
2861 | compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
2862 | { | |
2863 | struct cifs_sb_info *old = CIFS_SB(sb); | |
2864 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
2865 | ||
2866 | if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) | |
2867 | return 0; | |
2868 | ||
2869 | if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) != | |
2870 | (new->mnt_cifs_flags & CIFS_MOUNT_MASK)) | |
2871 | return 0; | |
2872 | ||
25c7f41e | 2873 | /* |
5eba8ab3 JL |
2874 | * We want to share sb only if we don't specify an r/wsize or |
2875 | * specified r/wsize is greater than or equal to existing one. | |
25c7f41e PS |
2876 | */ |
2877 | if (new->wsize && new->wsize < old->wsize) | |
2878 | return 0; | |
2879 | ||
5eba8ab3 JL |
2880 | if (new->rsize && new->rsize < old->rsize) |
2881 | return 0; | |
2882 | ||
1f68233c | 2883 | if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid)) |
25c7f41e PS |
2884 | return 0; |
2885 | ||
2886 | if (old->mnt_file_mode != new->mnt_file_mode || | |
2887 | old->mnt_dir_mode != new->mnt_dir_mode) | |
2888 | return 0; | |
2889 | ||
2890 | if (strcmp(old->local_nls->charset, new->local_nls->charset)) | |
2891 | return 0; | |
2892 | ||
2893 | if (old->actimeo != new->actimeo) | |
2894 | return 0; | |
2895 | ||
2896 | return 1; | |
2897 | } | |
2898 | ||
c1d8b24d SP |
2899 | static int |
2900 | match_prepath(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
2901 | { | |
2902 | struct cifs_sb_info *old = CIFS_SB(sb); | |
2903 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
2904 | ||
2905 | if (old->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) { | |
2906 | if (!(new->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)) | |
2907 | return 0; | |
2908 | /* The prepath should be null terminated strings */ | |
2909 | if (strcmp(new->prepath, old->prepath)) | |
2910 | return 0; | |
2911 | ||
2912 | return 1; | |
2913 | } | |
2914 | return 0; | |
2915 | } | |
2916 | ||
25c7f41e PS |
2917 | int |
2918 | cifs_match_super(struct super_block *sb, void *data) | |
2919 | { | |
2920 | struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; | |
2921 | struct smb_vol *volume_info; | |
2922 | struct cifs_sb_info *cifs_sb; | |
2923 | struct TCP_Server_Info *tcp_srv; | |
96daf2b0 SF |
2924 | struct cifs_ses *ses; |
2925 | struct cifs_tcon *tcon; | |
25c7f41e | 2926 | struct tcon_link *tlink; |
25c7f41e PS |
2927 | int rc = 0; |
2928 | ||
25c7f41e PS |
2929 | spin_lock(&cifs_tcp_ses_lock); |
2930 | cifs_sb = CIFS_SB(sb); | |
2931 | tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
2932 | if (IS_ERR(tlink)) { | |
2933 | spin_unlock(&cifs_tcp_ses_lock); | |
2934 | return rc; | |
2935 | } | |
2936 | tcon = tlink_tcon(tlink); | |
2937 | ses = tcon->ses; | |
2938 | tcp_srv = ses->server; | |
2939 | ||
2940 | volume_info = mnt_data->vol; | |
2941 | ||
9fa114f7 | 2942 | if (!match_server(tcp_srv, volume_info) || |
25c7f41e | 2943 | !match_session(ses, volume_info) || |
ae6f8dd4 | 2944 | !match_tcon(tcon, volume_info) || |
c1d8b24d | 2945 | !match_prepath(sb, mnt_data)) { |
25c7f41e PS |
2946 | rc = 0; |
2947 | goto out; | |
2948 | } | |
2949 | ||
2950 | rc = compare_mount_options(sb, mnt_data); | |
2951 | out: | |
25c7f41e | 2952 | spin_unlock(&cifs_tcp_ses_lock); |
f484b5d0 | 2953 | cifs_put_tlink(tlink); |
25c7f41e PS |
2954 | return rc; |
2955 | } | |
2956 | ||
1da177e4 | 2957 | int |
b669f33c | 2958 | get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path, |
2e6e02ab PS |
2959 | const struct nls_table *nls_codepage, unsigned int *num_referrals, |
2960 | struct dfs_info3_param **referrals, int remap) | |
1da177e4 LT |
2961 | { |
2962 | char *temp_unc; | |
2963 | int rc = 0; | |
2964 | ||
b669f33c | 2965 | if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer) |
2e6e02ab PS |
2966 | return -ENOSYS; |
2967 | ||
2968 | *num_referrals = 0; | |
2969 | *referrals = NULL; | |
1da177e4 | 2970 | |
2e6e02ab | 2971 | if (ses->ipc_tid == 0) { |
1da177e4 | 2972 | temp_unc = kmalloc(2 /* for slashes */ + |
2e6e02ab PS |
2973 | strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2) |
2974 | + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL); | |
1da177e4 LT |
2975 | if (temp_unc == NULL) |
2976 | return -ENOMEM; | |
2977 | temp_unc[0] = '\\'; | |
2978 | temp_unc[1] = '\\'; | |
2e6e02ab PS |
2979 | strcpy(temp_unc + 2, ses->serverName); |
2980 | strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$"); | |
2981 | rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL, | |
2982 | nls_codepage); | |
f96637be | 2983 | cifs_dbg(FYI, "Tcon rc = %d ipc_tid = %d\n", rc, ses->ipc_tid); |
1da177e4 LT |
2984 | kfree(temp_unc); |
2985 | } | |
2986 | if (rc == 0) | |
b669f33c PS |
2987 | rc = ses->server->ops->get_dfs_refer(xid, ses, old_path, |
2988 | referrals, num_referrals, | |
2989 | nls_codepage, remap); | |
2e6e02ab PS |
2990 | /* |
2991 | * BB - map targetUNCs to dfs_info3 structures, here or in | |
b669f33c | 2992 | * ses->server->ops->get_dfs_refer. |
2e6e02ab | 2993 | */ |
1da177e4 LT |
2994 | |
2995 | return rc; | |
2996 | } | |
2997 | ||
09e50d55 JL |
2998 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
2999 | static struct lock_class_key cifs_key[2]; | |
3000 | static struct lock_class_key cifs_slock_key[2]; | |
3001 | ||
3002 | static inline void | |
3003 | cifs_reclassify_socket4(struct socket *sock) | |
3004 | { | |
3005 | struct sock *sk = sock->sk; | |
fafc4e1e | 3006 | BUG_ON(!sock_allow_reclassification(sk)); |
09e50d55 JL |
3007 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", |
3008 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
3009 | } | |
3010 | ||
3011 | static inline void | |
3012 | cifs_reclassify_socket6(struct socket *sock) | |
3013 | { | |
3014 | struct sock *sk = sock->sk; | |
fafc4e1e | 3015 | BUG_ON(!sock_allow_reclassification(sk)); |
09e50d55 JL |
3016 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", |
3017 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
3018 | } | |
3019 | #else | |
3020 | static inline void | |
3021 | cifs_reclassify_socket4(struct socket *sock) | |
3022 | { | |
3023 | } | |
3024 | ||
3025 | static inline void | |
3026 | cifs_reclassify_socket6(struct socket *sock) | |
3027 | { | |
3028 | } | |
3029 | #endif | |
3030 | ||
1da177e4 | 3031 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 3032 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 3033 | { |
50c2f753 | 3034 | unsigned int i, j; |
1da177e4 | 3035 | |
50c2f753 | 3036 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
3037 | /* mask a nibble at a time and encode */ |
3038 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
3039 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 3040 | j += 2; |
1da177e4 LT |
3041 | } |
3042 | ||
3043 | } | |
3044 | ||
3eb9a889 BG |
3045 | static int |
3046 | bind_socket(struct TCP_Server_Info *server) | |
3047 | { | |
3048 | int rc = 0; | |
3049 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
3050 | /* Bind to the specified local IP address */ | |
3051 | struct socket *socket = server->ssocket; | |
3052 | rc = socket->ops->bind(socket, | |
3053 | (struct sockaddr *) &server->srcaddr, | |
3054 | sizeof(server->srcaddr)); | |
3055 | if (rc < 0) { | |
3056 | struct sockaddr_in *saddr4; | |
3057 | struct sockaddr_in6 *saddr6; | |
3058 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
3059 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
3060 | if (saddr6->sin6_family == AF_INET6) | |
f96637be JP |
3061 | cifs_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n", |
3062 | &saddr6->sin6_addr, rc); | |
3eb9a889 | 3063 | else |
f96637be JP |
3064 | cifs_dbg(VFS, "Failed to bind to: %pI4, error: %d\n", |
3065 | &saddr4->sin_addr.s_addr, rc); | |
3eb9a889 BG |
3066 | } |
3067 | } | |
3068 | return rc; | |
3069 | } | |
1da177e4 LT |
3070 | |
3071 | static int | |
a9f1b85e | 3072 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
3073 | { |
3074 | int rc = 0; | |
a9f1b85e PS |
3075 | /* |
3076 | * some servers require RFC1001 sessinit before sending | |
3077 | * negprot - BB check reconnection in case where second | |
3078 | * sessinit is sent but no second negprot | |
3079 | */ | |
3080 | struct rfc1002_session_packet *ses_init_buf; | |
3081 | struct smb_hdr *smb_buf; | |
3082 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
3083 | GFP_KERNEL); | |
3084 | if (ses_init_buf) { | |
3085 | ses_init_buf->trailer.session_req.called_len = 32; | |
3086 | ||
997152f6 | 3087 | if (server->server_RFC1001_name[0] != 0) |
a9f1b85e PS |
3088 | rfc1002mangle(ses_init_buf->trailer. |
3089 | session_req.called_name, | |
3090 | server->server_RFC1001_name, | |
3091 | RFC1001_NAME_LEN_WITH_NULL); | |
3092 | else | |
3093 | rfc1002mangle(ses_init_buf->trailer. | |
3094 | session_req.called_name, | |
3095 | DEFAULT_CIFS_CALLED_NAME, | |
3096 | RFC1001_NAME_LEN_WITH_NULL); | |
3097 | ||
3098 | ses_init_buf->trailer.session_req.calling_len = 32; | |
3099 | ||
3100 | /* | |
3101 | * calling name ends in null (byte 16) from old smb | |
3102 | * convention. | |
3103 | */ | |
c85c35f8 | 3104 | if (server->workstation_RFC1001_name[0] != 0) |
a9f1b85e PS |
3105 | rfc1002mangle(ses_init_buf->trailer. |
3106 | session_req.calling_name, | |
3107 | server->workstation_RFC1001_name, | |
3108 | RFC1001_NAME_LEN_WITH_NULL); | |
3109 | else | |
3110 | rfc1002mangle(ses_init_buf->trailer. | |
3111 | session_req.calling_name, | |
3112 | "LINUX_CIFS_CLNT", | |
3113 | RFC1001_NAME_LEN_WITH_NULL); | |
3114 | ||
3115 | ses_init_buf->trailer.session_req.scope1 = 0; | |
3116 | ses_init_buf->trailer.session_req.scope2 = 0; | |
3117 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
3118 | ||
3119 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
be8e3b00 | 3120 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
a9f1b85e PS |
3121 | rc = smb_send(server, smb_buf, 0x44); |
3122 | kfree(ses_init_buf); | |
3123 | /* | |
3124 | * RFC1001 layer in at least one server | |
3125 | * requires very short break before negprot | |
3126 | * presumably because not expecting negprot | |
3127 | * to follow so fast. This is a simple | |
3128 | * solution that works without | |
3129 | * complicating the code and causes no | |
3130 | * significant slowing down on mount | |
3131 | * for everyone else | |
3132 | */ | |
3133 | usleep_range(1000, 2000); | |
3134 | } | |
3135 | /* | |
3136 | * else the negprot may still work without this | |
3137 | * even though malloc failed | |
3138 | */ | |
3139 | ||
3140 | return rc; | |
3141 | } | |
3142 | ||
3143 | static int | |
3144 | generic_ip_connect(struct TCP_Server_Info *server) | |
3145 | { | |
3146 | int rc = 0; | |
6da97910 | 3147 | __be16 sport; |
a9f1b85e | 3148 | int slen, sfamily; |
bcf4b106 | 3149 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
3150 | struct sockaddr *saddr; |
3151 | ||
3152 | saddr = (struct sockaddr *) &server->dstaddr; | |
3153 | ||
3154 | if (server->dstaddr.ss_family == AF_INET6) { | |
3155 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
3156 | slen = sizeof(struct sockaddr_in6); | |
3157 | sfamily = AF_INET6; | |
3158 | } else { | |
3159 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
3160 | slen = sizeof(struct sockaddr_in); | |
3161 | sfamily = AF_INET; | |
3162 | } | |
1da177e4 | 3163 | |
bcf4b106 | 3164 | if (socket == NULL) { |
f1d0c998 RL |
3165 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
3166 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 3167 | if (rc < 0) { |
f96637be | 3168 | cifs_dbg(VFS, "Error %d creating socket\n", rc); |
a9f1b85e | 3169 | server->ssocket = NULL; |
1da177e4 | 3170 | return rc; |
1da177e4 | 3171 | } |
bcf4b106 JL |
3172 | |
3173 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
f96637be | 3174 | cifs_dbg(FYI, "Socket created\n"); |
bcf4b106 JL |
3175 | server->ssocket = socket; |
3176 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
3177 | if (sfamily == AF_INET6) |
3178 | cifs_reclassify_socket6(socket); | |
3179 | else | |
3180 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
3181 | } |
3182 | ||
3eb9a889 BG |
3183 | rc = bind_socket(server); |
3184 | if (rc < 0) | |
3185 | return rc; | |
3186 | ||
bcf4b106 JL |
3187 | /* |
3188 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
3189 | * the default. sock_setsockopt not used because it expects |
3190 | * user space buffer | |
bcf4b106 JL |
3191 | */ |
3192 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 3193 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 3194 | |
b387eaeb | 3195 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
3196 | if (server->noautotune) { |
3197 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
3198 | socket->sk->sk_sndbuf = 200 * 1024; | |
3199 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
3200 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 3201 | } |
1da177e4 | 3202 | |
6a5fa236 | 3203 | if (server->tcp_nodelay) { |
a9f1b85e | 3204 | int val = 1; |
6a5fa236 SF |
3205 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
3206 | (char *)&val, sizeof(val)); | |
3207 | if (rc) | |
f96637be JP |
3208 | cifs_dbg(FYI, "set TCP_NODELAY socket option error %d\n", |
3209 | rc); | |
6a5fa236 SF |
3210 | } |
3211 | ||
f96637be | 3212 | cifs_dbg(FYI, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n", |
bcf4b106 | 3213 | socket->sk->sk_sndbuf, |
b6b38f70 | 3214 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 3215 | |
ee1b3ea9 JL |
3216 | rc = socket->ops->connect(socket, saddr, slen, 0); |
3217 | if (rc < 0) { | |
f96637be | 3218 | cifs_dbg(FYI, "Error %d connecting to server\n", rc); |
ee1b3ea9 JL |
3219 | sock_release(socket); |
3220 | server->ssocket = NULL; | |
3221 | return rc; | |
3222 | } | |
3223 | ||
a9f1b85e PS |
3224 | if (sport == htons(RFC1001_PORT)) |
3225 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 3226 | |
1da177e4 LT |
3227 | return rc; |
3228 | } | |
3229 | ||
3230 | static int | |
a9f1b85e | 3231 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 3232 | { |
6da97910 | 3233 | __be16 *sport; |
a9f1b85e PS |
3234 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
3235 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 3236 | |
a9f1b85e PS |
3237 | if (server->dstaddr.ss_family == AF_INET6) |
3238 | sport = &addr6->sin6_port; | |
3239 | else | |
3240 | sport = &addr->sin_port; | |
1da177e4 | 3241 | |
a9f1b85e PS |
3242 | if (*sport == 0) { |
3243 | int rc; | |
1da177e4 | 3244 | |
a9f1b85e PS |
3245 | /* try with 445 port at first */ |
3246 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 3247 | |
a9f1b85e | 3248 | rc = generic_ip_connect(server); |
1da177e4 | 3249 | if (rc >= 0) |
a9f1b85e | 3250 | return rc; |
6a5fa236 | 3251 | |
a9f1b85e PS |
3252 | /* if it failed, try with 139 port */ |
3253 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
3254 | } |
3255 | ||
a9f1b85e | 3256 | return generic_ip_connect(server); |
1da177e4 LT |
3257 | } |
3258 | ||
6d5786a3 | 3259 | void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon, |
2c6292ae | 3260 | struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) |
8af18971 SF |
3261 | { |
3262 | /* if we are reconnecting then should we check to see if | |
3263 | * any requested capabilities changed locally e.g. via | |
3264 | * remount but we can not do much about it here | |
3265 | * if they have (even if we could detect it by the following) | |
3266 | * Perhaps we could add a backpointer to array of sb from tcon | |
3267 | * or if we change to make all sb to same share the same | |
3268 | * sb as NFS - then we only have one backpointer to sb. | |
3269 | * What if we wanted to mount the server share twice once with | |
3270 | * and once without posixacls or posix paths? */ | |
3271 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 3272 | |
c18c842b SF |
3273 | if (vol_info && vol_info->no_linux_ext) { |
3274 | tcon->fsUnixInfo.Capability = 0; | |
3275 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
f96637be | 3276 | cifs_dbg(FYI, "Linux protocol extensions disabled\n"); |
c18c842b SF |
3277 | return; |
3278 | } else if (vol_info) | |
3279 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
3280 | ||
3281 | if (tcon->unix_ext == 0) { | |
f96637be | 3282 | cifs_dbg(FYI, "Unix extensions disabled so not set on reconnect\n"); |
c18c842b SF |
3283 | return; |
3284 | } | |
50c2f753 | 3285 | |
fb8c4b14 | 3286 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 3287 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
f96637be | 3288 | cifs_dbg(FYI, "unix caps which server supports %lld\n", cap); |
8af18971 SF |
3289 | /* check for reconnect case in which we do not |
3290 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 3291 | if (vol_info == NULL) { |
50c2f753 | 3292 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
3293 | originally at mount time */ |
3294 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
3295 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
3296 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
3297 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
f96637be | 3298 | cifs_dbg(VFS, "POSIXPATH support change\n"); |
8af18971 | 3299 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 3300 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
f96637be JP |
3301 | cifs_dbg(VFS, "possible reconnect error\n"); |
3302 | cifs_dbg(VFS, "server disabled POSIX path support\n"); | |
11b6d645 | 3303 | } |
8af18971 | 3304 | } |
50c2f753 | 3305 | |
6848b733 | 3306 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
f96637be | 3307 | cifs_dbg(VFS, "per-share encryption not supported yet\n"); |
6848b733 | 3308 | |
8af18971 | 3309 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 3310 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 3311 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 3312 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
f96637be | 3313 | cifs_dbg(FYI, "negotiated posix acl support\n"); |
2c6292ae AV |
3314 | if (cifs_sb) |
3315 | cifs_sb->mnt_cifs_flags |= | |
3316 | CIFS_MOUNT_POSIXACL; | |
8af18971 SF |
3317 | } |
3318 | ||
75865f8c | 3319 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 3320 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 3321 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
f96637be | 3322 | cifs_dbg(FYI, "negotiate posix pathnames\n"); |
2c6292ae AV |
3323 | if (cifs_sb) |
3324 | cifs_sb->mnt_cifs_flags |= | |
8af18971 SF |
3325 | CIFS_MOUNT_POSIX_PATHS; |
3326 | } | |
50c2f753 | 3327 | |
f96637be | 3328 | cifs_dbg(FYI, "Negotiate caps 0x%x\n", (int)cap); |
8af18971 | 3329 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 3330 | if (cap & CIFS_UNIX_FCNTL_CAP) |
f96637be | 3331 | cifs_dbg(FYI, "FCNTL cap\n"); |
75865f8c | 3332 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
f96637be | 3333 | cifs_dbg(FYI, "EXTATTR cap\n"); |
75865f8c | 3334 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
f96637be | 3335 | cifs_dbg(FYI, "POSIX path cap\n"); |
75865f8c | 3336 | if (cap & CIFS_UNIX_XATTR_CAP) |
f96637be | 3337 | cifs_dbg(FYI, "XATTR cap\n"); |
75865f8c | 3338 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
f96637be | 3339 | cifs_dbg(FYI, "POSIX ACL cap\n"); |
75865f8c | 3340 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
f96637be | 3341 | cifs_dbg(FYI, "very large read cap\n"); |
75865f8c | 3342 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
f96637be | 3343 | cifs_dbg(FYI, "very large write cap\n"); |
6848b733 | 3344 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
f96637be | 3345 | cifs_dbg(FYI, "transport encryption cap\n"); |
6848b733 | 3346 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
f96637be | 3347 | cifs_dbg(FYI, "mandatory transport encryption cap\n"); |
8af18971 SF |
3348 | #endif /* CIFS_DEBUG2 */ |
3349 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 3350 | if (vol_info == NULL) { |
f96637be | 3351 | cifs_dbg(FYI, "resetting capabilities failed\n"); |
442aa310 | 3352 | } else |
f96637be | 3353 | 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 | 3354 | |
8af18971 SF |
3355 | } |
3356 | } | |
3357 | } | |
3358 | ||
4214ebf4 | 3359 | int cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
724d9f1c | 3360 | struct cifs_sb_info *cifs_sb) |
b1c8d2b4 | 3361 | { |
2de970ff JL |
3362 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
3363 | ||
2ced6f69 AV |
3364 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
3365 | cifs_sb->tlink_tree = RB_ROOT; | |
3366 | ||
25c7f41e | 3367 | /* |
5eba8ab3 JL |
3368 | * Temporarily set r/wsize for matching superblock. If we end up using |
3369 | * new sb then client will later negotiate it downward if needed. | |
25c7f41e | 3370 | */ |
5eba8ab3 | 3371 | cifs_sb->rsize = pvolume_info->rsize; |
25c7f41e PS |
3372 | cifs_sb->wsize = pvolume_info->wsize; |
3373 | ||
3b795210 SF |
3374 | cifs_sb->mnt_uid = pvolume_info->linux_uid; |
3375 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
3376 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
3377 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
f96637be JP |
3378 | cifs_dbg(FYI, "file mode: 0x%hx dir mode: 0x%hx\n", |
3379 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); | |
3b795210 | 3380 | |
6d20e840 | 3381 | cifs_sb->actimeo = pvolume_info->actimeo; |
724d9f1c | 3382 | cifs_sb->local_nls = pvolume_info->local_nls; |
6d20e840 | 3383 | |
3b795210 SF |
3384 | if (pvolume_info->noperm) |
3385 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
3386 | if (pvolume_info->setuids) | |
3387 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
95932655 SF |
3388 | if (pvolume_info->setuidfromacl) |
3389 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UID_FROM_ACL; | |
3b795210 SF |
3390 | if (pvolume_info->server_ino) |
3391 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
3392 | if (pvolume_info->remap) | |
2baa2682 SF |
3393 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SFM_CHR; |
3394 | if (pvolume_info->sfu_remap) | |
3b795210 SF |
3395 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; |
3396 | if (pvolume_info->no_xattr) | |
3397 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
3398 | if (pvolume_info->sfu_emul) | |
3399 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
3400 | if (pvolume_info->nobrl) | |
3401 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 3402 | if (pvolume_info->nostrictsync) |
4717bed6 | 3403 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
3404 | if (pvolume_info->mand_lock) |
3405 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
d4ffff1f PS |
3406 | if (pvolume_info->rwpidforward) |
3407 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; | |
3b795210 SF |
3408 | if (pvolume_info->cifs_acl) |
3409 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
3c7c87fd | 3410 | if (pvolume_info->backupuid_specified) { |
3d3ea8e6 | 3411 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; |
3c7c87fd SP |
3412 | cifs_sb->mnt_backupuid = pvolume_info->backupuid; |
3413 | } | |
3414 | if (pvolume_info->backupgid_specified) { | |
3d3ea8e6 | 3415 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; |
3c7c87fd SP |
3416 | cifs_sb->mnt_backupgid = pvolume_info->backupgid; |
3417 | } | |
3b795210 SF |
3418 | if (pvolume_info->override_uid) |
3419 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
3420 | if (pvolume_info->override_gid) | |
3421 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
3422 | if (pvolume_info->dynperm) | |
3423 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
3424 | if (pvolume_info->fsc) |
3425 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
3426 | if (pvolume_info->multiuser) |
3427 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
3428 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
3429 | if (pvolume_info->strict_io) |
3430 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 3431 | if (pvolume_info->direct_io) { |
f96637be | 3432 | cifs_dbg(FYI, "mounting share using direct i/o\n"); |
3b795210 SF |
3433 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
3434 | } | |
736a3320 SM |
3435 | if (pvolume_info->mfsymlinks) { |
3436 | if (pvolume_info->sfu_emul) { | |
db8b631d SF |
3437 | /* |
3438 | * Our SFU ("Services for Unix" emulation does not allow | |
3439 | * creating symlinks but does allow reading existing SFU | |
3440 | * symlinks (it does allow both creating and reading SFU | |
3441 | * style mknod and FIFOs though). When "mfsymlinks" and | |
3442 | * "sfu" are both enabled at the same time, it allows | |
3443 | * reading both types of symlinks, but will only create | |
3444 | * them with mfsymlinks format. This allows better | |
3445 | * Apple compatibility (probably better for Samba too) | |
3446 | * while still recognizing old Windows style symlinks. | |
3447 | */ | |
3448 | cifs_dbg(VFS, "mount options mfsymlinks and sfu both enabled\n"); | |
736a3320 | 3449 | } |
db8b631d | 3450 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; |
736a3320 | 3451 | } |
3b795210 SF |
3452 | |
3453 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
f96637be | 3454 | cifs_dbg(VFS, "mount option dynperm ignored if cifsacl mount option supported\n"); |
4214ebf4 SP |
3455 | |
3456 | if (pvolume_info->prepath) { | |
3457 | cifs_sb->prepath = kstrdup(pvolume_info->prepath, GFP_KERNEL); | |
3458 | if (cifs_sb->prepath == NULL) | |
3459 | return -ENOMEM; | |
3460 | } | |
3461 | ||
3462 | return 0; | |
b1c8d2b4 JL |
3463 | } |
3464 | ||
b9bce2e9 JL |
3465 | static void |
3466 | cleanup_volume_info_contents(struct smb_vol *volume_info) | |
1bfe73c2 | 3467 | { |
b946845a | 3468 | kfree(volume_info->username); |
1bfe73c2 | 3469 | kzfree(volume_info->password); |
95c75454 | 3470 | kfree(volume_info->UNC); |
b946845a SF |
3471 | kfree(volume_info->domainname); |
3472 | kfree(volume_info->iocharset); | |
1bfe73c2 | 3473 | kfree(volume_info->prepath); |
b9bce2e9 JL |
3474 | } |
3475 | ||
3476 | void | |
3477 | cifs_cleanup_volume_info(struct smb_vol *volume_info) | |
3478 | { | |
3479 | if (!volume_info) | |
3480 | return; | |
3481 | cleanup_volume_info_contents(volume_info); | |
1bfe73c2 | 3482 | kfree(volume_info); |
1bfe73c2 IM |
3483 | } |
3484 | ||
b9bce2e9 | 3485 | |
2d6d589d | 3486 | #ifdef CONFIG_CIFS_DFS_UPCALL |
6d3ea7e4 SF |
3487 | /* |
3488 | * cifs_build_path_to_root returns full path to root when we do not have an | |
3489 | * exiting connection (tcon) | |
3490 | */ | |
1bfe73c2 | 3491 | static char * |
b2a0fa15 | 3492 | build_unc_path_to_root(const struct smb_vol *vol, |
1bfe73c2 IM |
3493 | const struct cifs_sb_info *cifs_sb) |
3494 | { | |
b2a0fa15 | 3495 | char *full_path, *pos; |
839db3d1 | 3496 | unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0; |
b2a0fa15 | 3497 | unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); |
1bfe73c2 | 3498 | |
b2a0fa15 | 3499 | full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); |
1bfe73c2 IM |
3500 | if (full_path == NULL) |
3501 | return ERR_PTR(-ENOMEM); | |
3502 | ||
b2a0fa15 JL |
3503 | strncpy(full_path, vol->UNC, unc_len); |
3504 | pos = full_path + unc_len; | |
3505 | ||
3506 | if (pplen) { | |
1fc29bac JL |
3507 | *pos = CIFS_DIR_SEP(cifs_sb); |
3508 | strncpy(pos + 1, vol->prepath, pplen); | |
b2a0fa15 JL |
3509 | pos += pplen; |
3510 | } | |
3511 | ||
3512 | *pos = '\0'; /* add trailing null */ | |
f87d39d9 | 3513 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
f96637be | 3514 | cifs_dbg(FYI, "%s: full_path=%s\n", __func__, full_path); |
1bfe73c2 IM |
3515 | return full_path; |
3516 | } | |
dd613945 SF |
3517 | |
3518 | /* | |
3519 | * Perform a dfs referral query for a share and (optionally) prefix | |
3520 | * | |
046462ab SF |
3521 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
3522 | * to a string containing updated options for the submount. Otherwise it | |
3523 | * will be left untouched. | |
dd613945 SF |
3524 | * |
3525 | * Returns the rc from get_dfs_path to the caller, which can be used to | |
3526 | * determine whether there were referrals. | |
3527 | */ | |
3528 | static int | |
b669f33c | 3529 | expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses, |
dd613945 | 3530 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, |
046462ab | 3531 | int check_prefix) |
dd613945 SF |
3532 | { |
3533 | int rc; | |
3534 | unsigned int num_referrals = 0; | |
3535 | struct dfs_info3_param *referrals = NULL; | |
3536 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; | |
3537 | ||
3538 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
3539 | if (IS_ERR(full_path)) | |
3540 | return PTR_ERR(full_path); | |
3541 | ||
3542 | /* For DFS paths, skip the first '\' of the UNC */ | |
3543 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; | |
3544 | ||
b669f33c | 3545 | rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls, |
2baa2682 | 3546 | &num_referrals, &referrals, cifs_remap(cifs_sb)); |
dd613945 SF |
3547 | |
3548 | if (!rc && num_referrals > 0) { | |
3549 | char *fake_devname = NULL; | |
3550 | ||
3551 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, | |
3552 | full_path + 1, referrals, | |
3553 | &fake_devname); | |
3554 | ||
3555 | free_dfs_info_array(referrals, num_referrals); | |
046462ab | 3556 | |
dd613945 SF |
3557 | if (IS_ERR(mdata)) { |
3558 | rc = PTR_ERR(mdata); | |
3559 | mdata = NULL; | |
b9bce2e9 JL |
3560 | } else { |
3561 | cleanup_volume_info_contents(volume_info); | |
b9bce2e9 JL |
3562 | rc = cifs_setup_volume_info(volume_info, mdata, |
3563 | fake_devname); | |
dd613945 | 3564 | } |
b9bce2e9 JL |
3565 | kfree(fake_devname); |
3566 | kfree(cifs_sb->mountdata); | |
046462ab | 3567 | cifs_sb->mountdata = mdata; |
dd613945 SF |
3568 | } |
3569 | kfree(full_path); | |
3570 | return rc; | |
3571 | } | |
2d6d589d | 3572 | #endif |
1bfe73c2 | 3573 | |
04db79b0 JL |
3574 | static int |
3575 | cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, | |
3576 | const char *devname) | |
1da177e4 | 3577 | { |
724d9f1c | 3578 | int rc = 0; |
1da177e4 | 3579 | |
04db79b0 JL |
3580 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) |
3581 | return -EINVAL; | |
1da177e4 | 3582 | |
7586b765 | 3583 | if (volume_info->nullauth) { |
f96637be | 3584 | cifs_dbg(FYI, "Anonymous login\n"); |
04febabc JL |
3585 | kfree(volume_info->username); |
3586 | volume_info->username = NULL; | |
7586b765 | 3587 | } else if (volume_info->username) { |
1da177e4 | 3588 | /* BB fixme parse for domain name here */ |
f96637be | 3589 | cifs_dbg(FYI, "Username: %s\n", volume_info->username); |
1da177e4 | 3590 | } else { |
f96637be | 3591 | cifs_dbg(VFS, "No username specified\n"); |
50c2f753 SF |
3592 | /* In userspace mount helper we can get user name from alternate |
3593 | locations such as env variables and files on disk */ | |
04db79b0 | 3594 | return -EINVAL; |
1da177e4 LT |
3595 | } |
3596 | ||
1da177e4 | 3597 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 3598 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
3599 | /* load_nls_default cannot return null */ |
3600 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 3601 | } else { |
a5fc4ce0 JL |
3602 | volume_info->local_nls = load_nls(volume_info->iocharset); |
3603 | if (volume_info->local_nls == NULL) { | |
f96637be | 3604 | cifs_dbg(VFS, "CIFS mount error: iocharset %s not found\n", |
b6b38f70 | 3605 | volume_info->iocharset); |
04db79b0 | 3606 | return -ELIBACC; |
1da177e4 LT |
3607 | } |
3608 | } | |
724d9f1c | 3609 | |
724d9f1c PS |
3610 | return rc; |
3611 | } | |
3612 | ||
04db79b0 JL |
3613 | struct smb_vol * |
3614 | cifs_get_volume_info(char *mount_data, const char *devname) | |
3615 | { | |
3616 | int rc; | |
3617 | struct smb_vol *volume_info; | |
3618 | ||
6ee9542a | 3619 | volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL); |
04db79b0 JL |
3620 | if (!volume_info) |
3621 | return ERR_PTR(-ENOMEM); | |
3622 | ||
3623 | rc = cifs_setup_volume_info(volume_info, mount_data, devname); | |
3624 | if (rc) { | |
3625 | cifs_cleanup_volume_info(volume_info); | |
3626 | volume_info = ERR_PTR(rc); | |
3627 | } | |
3628 | ||
3629 | return volume_info; | |
3630 | } | |
3631 | ||
a6b5058f AA |
3632 | static int |
3633 | cifs_are_all_path_components_accessible(struct TCP_Server_Info *server, | |
3634 | unsigned int xid, | |
3635 | struct cifs_tcon *tcon, | |
3636 | struct cifs_sb_info *cifs_sb, | |
3637 | char *full_path) | |
3638 | { | |
3639 | int rc; | |
3640 | char *s; | |
3641 | char sep, tmp; | |
3642 | ||
3643 | sep = CIFS_DIR_SEP(cifs_sb); | |
3644 | s = full_path; | |
3645 | ||
3646 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, ""); | |
3647 | while (rc == 0) { | |
3648 | /* skip separators */ | |
3649 | while (*s == sep) | |
3650 | s++; | |
3651 | if (!*s) | |
3652 | break; | |
3653 | /* next separator */ | |
3654 | while (*s && *s != sep) | |
3655 | s++; | |
3656 | ||
3657 | /* | |
3658 | * temporarily null-terminate the path at the end of | |
3659 | * the current component | |
3660 | */ | |
3661 | tmp = *s; | |
3662 | *s = 0; | |
3663 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, | |
3664 | full_path); | |
3665 | *s = tmp; | |
3666 | } | |
3667 | return rc; | |
3668 | } | |
3669 | ||
724d9f1c | 3670 | int |
2c6292ae | 3671 | cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) |
724d9f1c | 3672 | { |
1daaae8f | 3673 | int rc; |
6d5786a3 | 3674 | unsigned int xid; |
af4281dc | 3675 | struct cifs_ses *ses; |
96daf2b0 | 3676 | struct cifs_tcon *tcon; |
af4281dc | 3677 | struct TCP_Server_Info *server; |
724d9f1c PS |
3678 | char *full_path; |
3679 | struct tcon_link *tlink; | |
3680 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
3681 | int referral_walks_count = 0; | |
20547490 | 3682 | #endif |
dd854466 | 3683 | |
b4caecd4 | 3684 | rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs"); |
dd854466 AV |
3685 | if (rc) |
3686 | return rc; | |
3687 | ||
20547490 | 3688 | #ifdef CONFIG_CIFS_DFS_UPCALL |
724d9f1c PS |
3689 | try_mount_again: |
3690 | /* cleanup activities if we're chasing a referral */ | |
3691 | if (referral_walks_count) { | |
3692 | if (tcon) | |
3693 | cifs_put_tcon(tcon); | |
af4281dc PS |
3694 | else if (ses) |
3695 | cifs_put_smb_ses(ses); | |
724d9f1c | 3696 | |
1dfd18d0 SP |
3697 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_POSIX_PATHS; |
3698 | ||
6d5786a3 | 3699 | free_xid(xid); |
724d9f1c PS |
3700 | } |
3701 | #endif | |
1daaae8f | 3702 | rc = 0; |
724d9f1c | 3703 | tcon = NULL; |
af4281dc PS |
3704 | ses = NULL; |
3705 | server = NULL; | |
724d9f1c PS |
3706 | full_path = NULL; |
3707 | tlink = NULL; | |
3708 | ||
6d5786a3 | 3709 | xid = get_xid(); |
1da177e4 | 3710 | |
63c038c2 | 3711 | /* get a reference to a tcp session */ |
af4281dc PS |
3712 | server = cifs_get_tcp_session(volume_info); |
3713 | if (IS_ERR(server)) { | |
3714 | rc = PTR_ERR(server); | |
dd854466 | 3715 | bdi_destroy(&cifs_sb->bdi); |
63c038c2 | 3716 | goto out; |
1da177e4 | 3717 | } |
141891f4 SF |
3718 | if ((volume_info->max_credits < 20) || |
3719 | (volume_info->max_credits > 60000)) | |
3720 | server->max_credits = SMB2_MAX_CREDITS_AVAILABLE; | |
3721 | else | |
3722 | server->max_credits = volume_info->max_credits; | |
36988c76 | 3723 | /* get a reference to a SMB session */ |
af4281dc PS |
3724 | ses = cifs_get_smb_ses(server, volume_info); |
3725 | if (IS_ERR(ses)) { | |
3726 | rc = PTR_ERR(ses); | |
3727 | ses = NULL; | |
36988c76 | 3728 | goto mount_fail_check; |
1da177e4 | 3729 | } |
50c2f753 | 3730 | |
592fafe6 | 3731 | #ifdef CONFIG_CIFS_SMB2 |
b618f001 SF |
3732 | if ((volume_info->persistent == true) && ((ses->server->capabilities & |
3733 | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) == 0)) { | |
3734 | cifs_dbg(VFS, "persistent handles not supported by server\n"); | |
3735 | rc = -EOPNOTSUPP; | |
3736 | goto mount_fail_check; | |
3737 | } | |
592fafe6 SF |
3738 | #endif /* CONFIG_CIFS_SMB2*/ |
3739 | ||
d00c28de | 3740 | /* search for existing tcon to this server share */ |
af4281dc | 3741 | tcon = cifs_get_tcon(ses, volume_info); |
d00c28de JL |
3742 | if (IS_ERR(tcon)) { |
3743 | rc = PTR_ERR(tcon); | |
3744 | tcon = NULL; | |
1bfe73c2 | 3745 | goto remote_path_check; |
d00c28de | 3746 | } |
1bfe73c2 | 3747 | |
d82c2df5 | 3748 | /* tell server which Unix caps we support */ |
29e20f9c | 3749 | if (cap_unix(tcon->ses)) { |
d82c2df5 SF |
3750 | /* reset of caps checks mount to see if unix extensions |
3751 | disabled for just this mount */ | |
2c6292ae | 3752 | reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info); |
6848b733 SF |
3753 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && |
3754 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & | |
3755 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) { | |
3756 | rc = -EACCES; | |
3757 | goto mount_fail_check; | |
3758 | } | |
3759 | } else | |
d82c2df5 | 3760 | tcon->unix_ext = 0; /* server does not support them */ |
c18c842b | 3761 | |
af4281dc PS |
3762 | /* do not care if a following call succeed - informational */ |
3763 | if (!tcon->ipc && server->ops->qfs_tcon) | |
3764 | server->ops->qfs_tcon(xid, tcon); | |
6848b733 | 3765 | |
24985c53 PS |
3766 | cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info); |
3767 | cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info); | |
f7910cbd | 3768 | |
66bfaadc | 3769 | /* tune readahead according to rsize */ |
09cbfeaf | 3770 | cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_SIZE; |
f7910cbd | 3771 | |
1bfe73c2 | 3772 | remote_path_check: |
c1508ca2 SF |
3773 | #ifdef CONFIG_CIFS_DFS_UPCALL |
3774 | /* | |
3775 | * Perform an unconditional check for whether there are DFS | |
3776 | * referrals for this path without prefix, to provide support | |
3777 | * for DFS referrals from w2k8 servers which don't seem to respond | |
3778 | * with PATH_NOT_COVERED to requests that include the prefix. | |
3779 | * Chase the referral if found, otherwise continue normally. | |
3780 | */ | |
3781 | if (referral_walks_count == 0) { | |
af4281dc PS |
3782 | int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, |
3783 | false); | |
c1508ca2 SF |
3784 | if (!refrc) { |
3785 | referral_walks_count++; | |
3786 | goto try_mount_again; | |
3787 | } | |
3788 | } | |
3789 | #endif | |
3790 | ||
f87d39d9 | 3791 | /* check if a whole path is not remote */ |
70945643 | 3792 | if (!rc && tcon) { |
68889f26 PS |
3793 | if (!server->ops->is_path_accessible) { |
3794 | rc = -ENOSYS; | |
3795 | goto mount_fail_check; | |
3796 | } | |
6d3ea7e4 SF |
3797 | /* |
3798 | * cifs_build_path_to_root works only when we have a valid tcon | |
3799 | */ | |
374402a2 SP |
3800 | full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon, |
3801 | tcon->Flags & SMB_SHARE_IS_IN_DFS); | |
e4cce94c IM |
3802 | if (full_path == NULL) { |
3803 | rc = -ENOMEM; | |
3804 | goto mount_fail_check; | |
3805 | } | |
68889f26 PS |
3806 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, |
3807 | full_path); | |
03ceace5 | 3808 | if (rc != 0 && rc != -EREMOTE) { |
e4cce94c IM |
3809 | kfree(full_path); |
3810 | goto mount_fail_check; | |
3811 | } | |
a6b5058f | 3812 | |
d171356f SP |
3813 | if (rc != -EREMOTE) { |
3814 | rc = cifs_are_all_path_components_accessible(server, | |
a6b5058f AA |
3815 | xid, tcon, cifs_sb, |
3816 | full_path); | |
d171356f SP |
3817 | if (rc != 0) { |
3818 | cifs_dbg(VFS, "cannot query dirs between root and final path, " | |
3819 | "enabling CIFS_MOUNT_USE_PREFIX_PATH\n"); | |
3820 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH; | |
3821 | rc = 0; | |
3822 | } | |
a6b5058f | 3823 | } |
e4cce94c IM |
3824 | kfree(full_path); |
3825 | } | |
3826 | ||
1bfe73c2 IM |
3827 | /* get referral if needed */ |
3828 | if (rc == -EREMOTE) { | |
d036f50f | 3829 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
3830 | if (referral_walks_count > MAX_NESTED_LINKS) { |
3831 | /* | |
3832 | * BB: when we implement proper loop detection, | |
3833 | * we will remove this check. But now we need it | |
3834 | * to prevent an indefinite loop if 'DFS tree' is | |
3835 | * misconfigured (i.e. has loops). | |
3836 | */ | |
3837 | rc = -ELOOP; | |
3838 | goto mount_fail_check; | |
3839 | } | |
1bfe73c2 | 3840 | |
af4281dc | 3841 | rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true); |
7b91e266 | 3842 | |
dd613945 | 3843 | if (!rc) { |
5c2503a8 | 3844 | referral_walks_count++; |
1bfe73c2 IM |
3845 | goto try_mount_again; |
3846 | } | |
dd613945 | 3847 | goto mount_fail_check; |
d036f50f SF |
3848 | #else /* No DFS support, return error on mount */ |
3849 | rc = -EOPNOTSUPP; | |
3850 | #endif | |
1bfe73c2 IM |
3851 | } |
3852 | ||
9d002df4 JL |
3853 | if (rc) |
3854 | goto mount_fail_check; | |
3855 | ||
3856 | /* now, hang the tcon off of the superblock */ | |
3857 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); | |
3858 | if (tlink == NULL) { | |
3859 | rc = -ENOMEM; | |
3860 | goto mount_fail_check; | |
3861 | } | |
3862 | ||
af4281dc | 3863 | tlink->tl_uid = ses->linux_uid; |
9d002df4 JL |
3864 | tlink->tl_tcon = tcon; |
3865 | tlink->tl_time = jiffies; | |
3866 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
3867 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3868 | ||
b647c35f | 3869 | cifs_sb->master_tlink = tlink; |
9d002df4 | 3870 | spin_lock(&cifs_sb->tlink_tree_lock); |
b647c35f | 3871 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
9d002df4 | 3872 | spin_unlock(&cifs_sb->tlink_tree_lock); |
413e661c | 3873 | |
da472fc8 | 3874 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
3875 | TLINK_IDLE_EXPIRE); |
3876 | ||
1bfe73c2 IM |
3877 | mount_fail_check: |
3878 | /* on error free sesinfo and tcon struct if needed */ | |
3879 | if (rc) { | |
1bfe73c2 | 3880 | /* If find_unc succeeded then rc == 0 so we can not end */ |
25985edc | 3881 | /* up accidentally freeing someone elses tcon struct */ |
1bfe73c2 IM |
3882 | if (tcon) |
3883 | cifs_put_tcon(tcon); | |
af4281dc PS |
3884 | else if (ses) |
3885 | cifs_put_smb_ses(ses); | |
1bfe73c2 | 3886 | else |
53e0e11e | 3887 | cifs_put_tcp_session(server, 0); |
dd854466 | 3888 | bdi_destroy(&cifs_sb->bdi); |
1bfe73c2 IM |
3889 | } |
3890 | ||
70fe7dc0 | 3891 | out: |
6d5786a3 | 3892 | free_xid(xid); |
1da177e4 LT |
3893 | return rc; |
3894 | } | |
3895 | ||
8d1bca32 JL |
3896 | /* |
3897 | * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon | |
3898 | * pointer may be NULL. | |
3899 | */ | |
1da177e4 | 3900 | int |
2e6e02ab | 3901 | CIFSTCon(const unsigned int xid, struct cifs_ses *ses, |
96daf2b0 | 3902 | const char *tree, struct cifs_tcon *tcon, |
1da177e4 LT |
3903 | const struct nls_table *nls_codepage) |
3904 | { | |
3905 | struct smb_hdr *smb_buffer; | |
3906 | struct smb_hdr *smb_buffer_response; | |
3907 | TCONX_REQ *pSMB; | |
3908 | TCONX_RSP *pSMBr; | |
3909 | unsigned char *bcc_ptr; | |
3910 | int rc = 0; | |
690c522f JL |
3911 | int length; |
3912 | __u16 bytes_left, count; | |
1da177e4 LT |
3913 | |
3914 | if (ses == NULL) | |
3915 | return -EIO; | |
3916 | ||
3917 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 3918 | if (smb_buffer == NULL) |
1da177e4 | 3919 | return -ENOMEM; |
ca43e3be | 3920 | |
1da177e4 LT |
3921 | smb_buffer_response = smb_buffer; |
3922 | ||
3923 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
3924 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 | 3925 | |
88257360 | 3926 | smb_buffer->Mid = get_next_mid(ses->server); |
1da177e4 LT |
3927 | smb_buffer->Uid = ses->Suid; |
3928 | pSMB = (TCONX_REQ *) smb_buffer; | |
3929 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
3930 | ||
3931 | pSMB->AndXCommand = 0xFF; | |
3932 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 3933 | bcc_ptr = &pSMB->Password[0]; |
8d1bca32 | 3934 | if (!tcon || (ses->server->sec_mode & SECMODE_USER)) { |
eeac8047 | 3935 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 3936 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 3937 | bcc_ptr++; /* skip password */ |
7c7b25bc | 3938 | /* already aligned so no need to do it below */ |
eeac8047 | 3939 | } else { |
540b2e37 | 3940 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
3941 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
3942 | specified as required (when that support is added to | |
3943 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 3944 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
3945 | by Samba (not sure whether other servers allow |
3946 | NTLMv2 password here) */ | |
7c7b25bc | 3947 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 3948 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
3f618223 | 3949 | (ses->sectype == LANMAN)) |
d3ba50b1 | 3950 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
96daf2b0 | 3951 | ses->server->sec_mode & |
4e53a3fb JL |
3952 | SECMODE_PW_ENCRYPT ? true : false, |
3953 | bcc_ptr); | |
7c7b25bc SF |
3954 | else |
3955 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 | 3956 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
9ef5992e | 3957 | bcc_ptr, nls_codepage); |
f3a31a2b SF |
3958 | if (rc) { |
3959 | cifs_dbg(FYI, "%s Can't generate NTLM rsp. Error: %d\n", | |
3960 | __func__, rc); | |
3961 | cifs_buf_release(smb_buffer); | |
3962 | return rc; | |
3963 | } | |
eeac8047 | 3964 | |
540b2e37 | 3965 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 3966 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
3967 | /* must align unicode strings */ |
3968 | *bcc_ptr = 0; /* null byte password */ | |
3969 | bcc_ptr++; | |
3970 | } | |
eeac8047 | 3971 | } |
1da177e4 | 3972 | |
38d77c50 | 3973 | if (ses->server->sign) |
1da177e4 LT |
3974 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
3975 | ||
3976 | if (ses->capabilities & CAP_STATUS32) { | |
3977 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
3978 | } | |
3979 | if (ses->capabilities & CAP_DFS) { | |
3980 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
3981 | } | |
3982 | if (ses->capabilities & CAP_UNICODE) { | |
3983 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
3984 | length = | |
acbbb76a | 3985 | cifs_strtoUTF16((__le16 *) bcc_ptr, tree, |
50c2f753 | 3986 | 6 /* max utf8 char length in bytes */ * |
a878fb22 SF |
3987 | (/* server len*/ + 256 /* share len */), nls_codepage); |
3988 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
3989 | bcc_ptr += 2; /* skip trailing null */ |
3990 | } else { /* ASCII */ | |
1da177e4 LT |
3991 | strcpy(bcc_ptr, tree); |
3992 | bcc_ptr += strlen(tree) + 1; | |
3993 | } | |
3994 | strcpy(bcc_ptr, "?????"); | |
3995 | bcc_ptr += strlen("?????"); | |
3996 | bcc_ptr += 1; | |
3997 | count = bcc_ptr - &pSMB->Password[0]; | |
be8e3b00 SF |
3998 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
3999 | pSMB->hdr.smb_buf_length) + count); | |
1da177e4 LT |
4000 | pSMB->ByteCount = cpu_to_le16(count); |
4001 | ||
133672ef | 4002 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 4003 | 0); |
1da177e4 | 4004 | |
1da177e4 LT |
4005 | /* above now done in SendReceive */ |
4006 | if ((rc == 0) && (tcon != NULL)) { | |
0e0d2cf3 SF |
4007 | bool is_unicode; |
4008 | ||
1da177e4 | 4009 | tcon->tidStatus = CifsGood; |
3b795210 | 4010 | tcon->need_reconnect = false; |
1da177e4 LT |
4011 | tcon->tid = smb_buffer_response->Tid; |
4012 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 4013 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 4014 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
4015 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
4016 | is_unicode = true; | |
4017 | else | |
4018 | is_unicode = false; | |
4019 | ||
cc20c031 | 4020 | |
50c2f753 | 4021 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
4022 | if (length == 3) { |
4023 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
4024 | (bcc_ptr[2] == 'C')) { | |
f96637be | 4025 | cifs_dbg(FYI, "IPC connection\n"); |
7f8ed420 SF |
4026 | tcon->ipc = 1; |
4027 | } | |
4028 | } else if (length == 2) { | |
4029 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
4030 | /* the most common case */ | |
f96637be | 4031 | cifs_dbg(FYI, "disk share connection\n"); |
7f8ed420 SF |
4032 | } |
4033 | } | |
50c2f753 | 4034 | bcc_ptr += length + 1; |
cc20c031 | 4035 | bytes_left -= (length + 1); |
46b51d08 | 4036 | strlcpy(tcon->treeName, tree, sizeof(tcon->treeName)); |
cc20c031 JL |
4037 | |
4038 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 4039 | kfree(tcon->nativeFileSystem); |
acbbb76a | 4040 | tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr, |
0e0d2cf3 | 4041 | bytes_left, is_unicode, |
cc20c031 JL |
4042 | nls_codepage); |
4043 | ||
f96637be | 4044 | cifs_dbg(FYI, "nativeFileSystem=%s\n", tcon->nativeFileSystem); |
cc20c031 | 4045 | |
fb8c4b14 | 4046 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
4047 | (smb_buffer_response->WordCount == 7)) |
4048 | /* field is in same location */ | |
3979877e SF |
4049 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
4050 | else | |
4051 | tcon->Flags = 0; | |
f96637be | 4052 | cifs_dbg(FYI, "Tcon flags: 0x%x\n", tcon->Flags); |
1da177e4 | 4053 | } else if ((rc == 0) && tcon == NULL) { |
50c2f753 | 4054 | /* all we need to save for IPC$ connection */ |
1da177e4 LT |
4055 | ses->ipc_tid = smb_buffer_response->Tid; |
4056 | } | |
4057 | ||
a8a11d39 | 4058 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
4059 | return rc; |
4060 | } | |
4061 | ||
2e32cf5e AV |
4062 | static void delayed_free(struct rcu_head *p) |
4063 | { | |
4064 | struct cifs_sb_info *sbi = container_of(p, struct cifs_sb_info, rcu); | |
4065 | unload_nls(sbi->local_nls); | |
4066 | kfree(sbi); | |
4067 | } | |
4068 | ||
2a9b9951 AV |
4069 | void |
4070 | cifs_umount(struct cifs_sb_info *cifs_sb) | |
1da177e4 | 4071 | { |
b647c35f JL |
4072 | struct rb_root *root = &cifs_sb->tlink_tree; |
4073 | struct rb_node *node; | |
4074 | struct tcon_link *tlink; | |
9d002df4 | 4075 | |
2de970ff JL |
4076 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
4077 | ||
b647c35f JL |
4078 | spin_lock(&cifs_sb->tlink_tree_lock); |
4079 | while ((node = rb_first(root))) { | |
4080 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
4081 | cifs_get_tlink(tlink); | |
4082 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4083 | rb_erase(node, root); | |
1da177e4 | 4084 | |
b647c35f JL |
4085 | spin_unlock(&cifs_sb->tlink_tree_lock); |
4086 | cifs_put_tlink(tlink); | |
4087 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4088 | } | |
4089 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 4090 | |
dd854466 | 4091 | bdi_destroy(&cifs_sb->bdi); |
d757d71b | 4092 | kfree(cifs_sb->mountdata); |
a6b5058f | 4093 | kfree(cifs_sb->prepath); |
2e32cf5e | 4094 | call_rcu(&cifs_sb->rcu, delayed_free); |
50c2f753 | 4095 | } |
1da177e4 | 4096 | |
286170aa PS |
4097 | int |
4098 | cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses) | |
1da177e4 LT |
4099 | { |
4100 | int rc = 0; | |
198b5682 | 4101 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 4102 | |
286170aa PS |
4103 | if (!server->ops->need_neg || !server->ops->negotiate) |
4104 | return -ENOSYS; | |
4105 | ||
198b5682 | 4106 | /* only send once per connect */ |
286170aa | 4107 | if (!server->ops->need_neg(server)) |
198b5682 JL |
4108 | return 0; |
4109 | ||
45275789 | 4110 | set_credits(server, 1); |
286170aa PS |
4111 | |
4112 | rc = server->ops->negotiate(xid, ses); | |
198b5682 JL |
4113 | if (rc == 0) { |
4114 | spin_lock(&GlobalMid_Lock); | |
7fdbaa1b | 4115 | if (server->tcpStatus == CifsNeedNegotiate) |
198b5682 JL |
4116 | server->tcpStatus = CifsGood; |
4117 | else | |
4118 | rc = -EHOSTDOWN; | |
4119 | spin_unlock(&GlobalMid_Lock); | |
198b5682 JL |
4120 | } |
4121 | ||
4122 | return rc; | |
4123 | } | |
4124 | ||
58c45c58 PS |
4125 | int |
4126 | cifs_setup_session(const unsigned int xid, struct cifs_ses *ses, | |
4127 | struct nls_table *nls_info) | |
198b5682 | 4128 | { |
58c45c58 | 4129 | int rc = -ENOSYS; |
198b5682 | 4130 | struct TCP_Server_Info *server = ses->server; |
26b994fa | 4131 | |
198b5682 | 4132 | ses->capabilities = server->capabilities; |
26b994fa | 4133 | if (linuxExtEnabled == 0) |
29e20f9c | 4134 | ses->capabilities &= (~server->vals->cap_unix); |
20418acd | 4135 | |
f96637be | 4136 | cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n", |
96daf2b0 | 4137 | server->sec_mode, server->capabilities, server->timeAdj); |
cb7691b6 | 4138 | |
58c45c58 PS |
4139 | if (server->ops->sess_setup) |
4140 | rc = server->ops->sess_setup(xid, ses, nls_info); | |
4141 | ||
d4e63bd6 | 4142 | if (rc) |
f96637be | 4143 | cifs_dbg(VFS, "Send error in SessSetup = %d\n", rc); |
21e73393 | 4144 | |
1da177e4 LT |
4145 | return rc; |
4146 | } | |
4147 | ||
8a8798a5 JL |
4148 | static int |
4149 | cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses) | |
4150 | { | |
3f618223 JL |
4151 | vol->sectype = ses->sectype; |
4152 | ||
4153 | /* krb5 is special, since we don't need username or pw */ | |
4154 | if (vol->sectype == Kerberos) | |
8a8798a5 | 4155 | return 0; |
8a8798a5 JL |
4156 | |
4157 | return cifs_set_cifscreds(vol, ses); | |
4158 | } | |
4159 | ||
96daf2b0 | 4160 | static struct cifs_tcon * |
6d4a0832 | 4161 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid) |
9d002df4 | 4162 | { |
8a8798a5 | 4163 | int rc; |
96daf2b0 SF |
4164 | struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); |
4165 | struct cifs_ses *ses; | |
4166 | struct cifs_tcon *tcon = NULL; | |
9d002df4 | 4167 | struct smb_vol *vol_info; |
9d002df4 JL |
4168 | |
4169 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
803ab977 DC |
4170 | if (vol_info == NULL) |
4171 | return ERR_PTR(-ENOMEM); | |
9d002df4 | 4172 | |
9d002df4 JL |
4173 | vol_info->local_nls = cifs_sb->local_nls; |
4174 | vol_info->linux_uid = fsuid; | |
4175 | vol_info->cred_uid = fsuid; | |
4176 | vol_info->UNC = master_tcon->treeName; | |
4177 | vol_info->retry = master_tcon->retry; | |
4178 | vol_info->nocase = master_tcon->nocase; | |
4179 | vol_info->local_lease = master_tcon->local_lease; | |
4180 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
28e11bd8 JL |
4181 | vol_info->sectype = master_tcon->ses->sectype; |
4182 | vol_info->sign = master_tcon->ses->sign; | |
9d002df4 | 4183 | |
8a8798a5 JL |
4184 | rc = cifs_set_vol_auth(vol_info, master_tcon->ses); |
4185 | if (rc) { | |
4186 | tcon = ERR_PTR(rc); | |
4187 | goto out; | |
4188 | } | |
9d002df4 JL |
4189 | |
4190 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 4191 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 4192 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 4193 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
4194 | |
4195 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
4196 | if (IS_ERR(ses)) { | |
96daf2b0 | 4197 | tcon = (struct cifs_tcon *)ses; |
53e0e11e | 4198 | cifs_put_tcp_session(master_tcon->ses->server, 0); |
9d002df4 JL |
4199 | goto out; |
4200 | } | |
4201 | ||
4202 | tcon = cifs_get_tcon(ses, vol_info); | |
4203 | if (IS_ERR(tcon)) { | |
4204 | cifs_put_smb_ses(ses); | |
4205 | goto out; | |
4206 | } | |
4207 | ||
29e20f9c | 4208 | if (cap_unix(ses)) |
9d002df4 JL |
4209 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); |
4210 | out: | |
8a8798a5 JL |
4211 | kfree(vol_info->username); |
4212 | kfree(vol_info->password); | |
9d002df4 JL |
4213 | kfree(vol_info); |
4214 | ||
4215 | return tcon; | |
4216 | } | |
4217 | ||
96daf2b0 | 4218 | struct cifs_tcon * |
9d002df4 JL |
4219 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) |
4220 | { | |
4221 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
4222 | } | |
4223 | ||
b647c35f JL |
4224 | /* find and return a tlink with given uid */ |
4225 | static struct tcon_link * | |
6d4a0832 | 4226 | tlink_rb_search(struct rb_root *root, kuid_t uid) |
b647c35f JL |
4227 | { |
4228 | struct rb_node *node = root->rb_node; | |
4229 | struct tcon_link *tlink; | |
4230 | ||
4231 | while (node) { | |
4232 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
4233 | ||
6d4a0832 | 4234 | if (uid_gt(tlink->tl_uid, uid)) |
b647c35f | 4235 | node = node->rb_left; |
6d4a0832 | 4236 | else if (uid_lt(tlink->tl_uid, uid)) |
b647c35f JL |
4237 | node = node->rb_right; |
4238 | else | |
4239 | return tlink; | |
4240 | } | |
4241 | return NULL; | |
4242 | } | |
4243 | ||
4244 | /* insert a tcon_link into the tree */ | |
4245 | static void | |
4246 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
4247 | { | |
4248 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
4249 | struct tcon_link *tlink; | |
4250 | ||
4251 | while (*new) { | |
4252 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
4253 | parent = *new; | |
4254 | ||
6d4a0832 | 4255 | if (uid_gt(tlink->tl_uid, new_tlink->tl_uid)) |
b647c35f JL |
4256 | new = &((*new)->rb_left); |
4257 | else | |
4258 | new = &((*new)->rb_right); | |
4259 | } | |
4260 | ||
4261 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
4262 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
4263 | } | |
4264 | ||
9d002df4 JL |
4265 | /* |
4266 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
4267 | * current task. | |
4268 | * | |
4269 | * If the superblock doesn't refer to a multiuser mount, then just return | |
4270 | * the master tcon for the mount. | |
4271 | * | |
6ef933a3 | 4272 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
4273 | * exists, then check to see if it's pending construction. If it is then wait |
4274 | * for construction to complete. Once it's no longer pending, check to see if | |
4275 | * it failed and either return an error or retry construction, depending on | |
4276 | * the timeout. | |
4277 | * | |
4278 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
4279 | * try to construct a new one. | |
4280 | */ | |
4281 | struct tcon_link * | |
4282 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
4283 | { | |
4284 | int ret; | |
6d4a0832 | 4285 | kuid_t fsuid = current_fsuid(); |
9d002df4 JL |
4286 | struct tcon_link *tlink, *newtlink; |
4287 | ||
4288 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
4289 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
4290 | ||
4291 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 4292 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4293 | if (tlink) |
4294 | cifs_get_tlink(tlink); | |
4295 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4296 | ||
4297 | if (tlink == NULL) { | |
4298 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
4299 | if (newtlink == NULL) | |
4300 | return ERR_PTR(-ENOMEM); | |
b647c35f | 4301 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
4302 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
4303 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
4304 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
4305 | cifs_get_tlink(newtlink); | |
4306 | ||
9d002df4 JL |
4307 | spin_lock(&cifs_sb->tlink_tree_lock); |
4308 | /* was one inserted after previous search? */ | |
b647c35f | 4309 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4310 | if (tlink) { |
4311 | cifs_get_tlink(tlink); | |
4312 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4313 | kfree(newtlink); |
4314 | goto wait_for_construction; | |
4315 | } | |
9d002df4 | 4316 | tlink = newtlink; |
b647c35f JL |
4317 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
4318 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4319 | } else { |
4320 | wait_for_construction: | |
4321 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
9d002df4 JL |
4322 | TASK_INTERRUPTIBLE); |
4323 | if (ret) { | |
4324 | cifs_put_tlink(tlink); | |
74316201 | 4325 | return ERR_PTR(-ERESTARTSYS); |
9d002df4 JL |
4326 | } |
4327 | ||
4328 | /* if it's good, return it */ | |
4329 | if (!IS_ERR(tlink->tl_tcon)) | |
4330 | return tlink; | |
4331 | ||
4332 | /* return error if we tried this already recently */ | |
4333 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
4334 | cifs_put_tlink(tlink); | |
4335 | return ERR_PTR(-EACCES); | |
4336 | } | |
4337 | ||
4338 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
4339 | goto wait_for_construction; | |
4340 | } | |
4341 | ||
4342 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
4343 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
4344 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
4345 | ||
4346 | if (IS_ERR(tlink->tl_tcon)) { | |
4347 | cifs_put_tlink(tlink); | |
4348 | return ERR_PTR(-EACCES); | |
4349 | } | |
4350 | ||
4351 | return tlink; | |
4352 | } | |
2de970ff JL |
4353 | |
4354 | /* | |
4355 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
4356 | * out tcons. | |
4357 | */ | |
4358 | static void | |
4359 | cifs_prune_tlinks(struct work_struct *work) | |
4360 | { | |
4361 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
4362 | prune_tlinks.work); | |
b647c35f JL |
4363 | struct rb_root *root = &cifs_sb->tlink_tree; |
4364 | struct rb_node *node = rb_first(root); | |
4365 | struct rb_node *tmp; | |
4366 | struct tcon_link *tlink; | |
2de970ff | 4367 | |
b647c35f JL |
4368 | /* |
4369 | * Because we drop the spinlock in the loop in order to put the tlink | |
4370 | * it's not guarded against removal of links from the tree. The only | |
4371 | * places that remove entries from the tree are this function and | |
4372 | * umounts. Because this function is non-reentrant and is canceled | |
4373 | * before umount can proceed, this is safe. | |
4374 | */ | |
4375 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4376 | node = rb_first(root); | |
4377 | while (node != NULL) { | |
4378 | tmp = node; | |
4379 | node = rb_next(tmp); | |
4380 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
4381 | ||
4382 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
4383 | atomic_read(&tlink->tl_count) != 0 || | |
4384 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
4385 | continue; | |
2de970ff | 4386 | |
b647c35f JL |
4387 | cifs_get_tlink(tlink); |
4388 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4389 | rb_erase(tmp, root); | |
4390 | ||
4391 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4392 | cifs_put_tlink(tlink); | |
4393 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4394 | } | |
4395 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff | 4396 | |
da472fc8 | 4397 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
4398 | TLINK_IDLE_EXPIRE); |
4399 | } |