Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/connect.c | |
3 | * | |
1080ef75 | 4 | * Copyright (C) International Business Machines Corp., 2002,2011 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
fb8c4b14 | 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
1da177e4 LT |
20 | */ |
21 | #include <linux/fs.h> | |
22 | #include <linux/net.h> | |
23 | #include <linux/string.h> | |
24 | #include <linux/list.h> | |
25 | #include <linux/wait.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
1da177e4 LT |
27 | #include <linux/pagemap.h> |
28 | #include <linux/ctype.h> | |
29 | #include <linux/utsname.h> | |
30 | #include <linux/mempool.h> | |
b8643e1b | 31 | #include <linux/delay.h> |
f191401f | 32 | #include <linux/completion.h> |
aaf737ad | 33 | #include <linux/kthread.h> |
0ae0efad | 34 | #include <linux/pagevec.h> |
7dfb7103 | 35 | #include <linux/freezer.h> |
5c2503a8 | 36 | #include <linux/namei.h> |
1da177e4 LT |
37 | #include <asm/uaccess.h> |
38 | #include <asm/processor.h> | |
50b64e3b | 39 | #include <linux/inet.h> |
143cb494 | 40 | #include <linux/module.h> |
8a8798a5 | 41 | #include <keys/user-type.h> |
0e2bedaa | 42 | #include <net/ipv6.h> |
8830d7e0 SP |
43 | #include <linux/parser.h> |
44 | ||
1da177e4 LT |
45 | #include "cifspdu.h" |
46 | #include "cifsglob.h" | |
47 | #include "cifsproto.h" | |
48 | #include "cifs_unicode.h" | |
49 | #include "cifs_debug.h" | |
50 | #include "cifs_fs_sb.h" | |
51 | #include "ntlmssp.h" | |
52 | #include "nterr.h" | |
53 | #include "rfc1002pdu.h" | |
488f1d2d | 54 | #include "fscache.h" |
1da177e4 LT |
55 | |
56 | #define CIFS_PORT 445 | |
57 | #define RFC1001_PORT 139 | |
58 | ||
c74093b6 JL |
59 | /* SMB echo "timeout" -- FIXME: tunable? */ |
60 | #define SMB_ECHO_INTERVAL (60 * HZ) | |
61 | ||
1da177e4 LT |
62 | extern mempool_t *cifs_req_poolp; |
63 | ||
2de970ff | 64 | /* FIXME: should these be tunable? */ |
9d002df4 | 65 | #define TLINK_ERROR_EXPIRE (1 * HZ) |
2de970ff | 66 | #define TLINK_IDLE_EXPIRE (600 * HZ) |
9d002df4 | 67 | |
8830d7e0 SP |
68 | enum { |
69 | ||
70 | /* Mount options that take no arguments */ | |
71 | Opt_user_xattr, Opt_nouser_xattr, | |
72 | Opt_forceuid, Opt_noforceuid, | |
73 | Opt_noblocksend, Opt_noautotune, | |
74 | Opt_hard, Opt_soft, Opt_perm, Opt_noperm, | |
75 | Opt_mapchars, Opt_nomapchars, Opt_sfu, | |
76 | Opt_nosfu, Opt_nodfs, Opt_posixpaths, | |
77 | Opt_noposixpaths, Opt_nounix, | |
78 | Opt_nocase, | |
79 | Opt_brl, Opt_nobrl, | |
80 | Opt_forcemandatorylock, Opt_setuids, | |
81 | Opt_nosetuids, Opt_dynperm, Opt_nodynperm, | |
82 | Opt_nohard, Opt_nosoft, | |
83 | Opt_nointr, Opt_intr, | |
84 | Opt_nostrictsync, Opt_strictsync, | |
85 | Opt_serverino, Opt_noserverino, | |
86 | Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl, | |
87 | Opt_acl, Opt_noacl, Opt_locallease, | |
88 | Opt_sign, Opt_seal, Opt_direct, | |
89 | Opt_strictcache, Opt_noac, | |
90 | Opt_fsc, Opt_mfsymlinks, | |
d8162558 | 91 | Opt_multiuser, Opt_sloppy, |
8830d7e0 SP |
92 | |
93 | /* Mount options which take numeric value */ | |
94 | Opt_backupuid, Opt_backupgid, Opt_uid, | |
95 | Opt_cruid, Opt_gid, Opt_file_mode, | |
96 | Opt_dirmode, Opt_port, | |
97 | Opt_rsize, Opt_wsize, Opt_actimeo, | |
98 | ||
99 | /* Mount options which take string value */ | |
100 | Opt_user, Opt_pass, Opt_ip, | |
101 | Opt_unc, Opt_domain, | |
102 | Opt_srcaddr, Opt_prefixpath, | |
103 | Opt_iocharset, Opt_sockopt, | |
104 | Opt_netbiosname, Opt_servern, | |
23db65f5 | 105 | Opt_ver, Opt_vers, Opt_sec, Opt_cache, |
8830d7e0 SP |
106 | |
107 | /* Mount options to be ignored */ | |
108 | Opt_ignore, | |
109 | ||
110 | /* Options which could be blank */ | |
111 | Opt_blank_pass, | |
4fe9e963 SP |
112 | Opt_blank_user, |
113 | Opt_blank_ip, | |
8830d7e0 SP |
114 | |
115 | Opt_err | |
116 | }; | |
117 | ||
118 | static const match_table_t cifs_mount_option_tokens = { | |
119 | ||
120 | { Opt_user_xattr, "user_xattr" }, | |
121 | { Opt_nouser_xattr, "nouser_xattr" }, | |
122 | { Opt_forceuid, "forceuid" }, | |
123 | { Opt_noforceuid, "noforceuid" }, | |
124 | { Opt_noblocksend, "noblocksend" }, | |
125 | { Opt_noautotune, "noautotune" }, | |
126 | { Opt_hard, "hard" }, | |
127 | { Opt_soft, "soft" }, | |
128 | { Opt_perm, "perm" }, | |
129 | { Opt_noperm, "noperm" }, | |
130 | { Opt_mapchars, "mapchars" }, | |
131 | { Opt_nomapchars, "nomapchars" }, | |
132 | { Opt_sfu, "sfu" }, | |
133 | { Opt_nosfu, "nosfu" }, | |
134 | { Opt_nodfs, "nodfs" }, | |
135 | { Opt_posixpaths, "posixpaths" }, | |
136 | { Opt_noposixpaths, "noposixpaths" }, | |
137 | { Opt_nounix, "nounix" }, | |
138 | { Opt_nounix, "nolinux" }, | |
139 | { Opt_nocase, "nocase" }, | |
140 | { Opt_nocase, "ignorecase" }, | |
141 | { Opt_brl, "brl" }, | |
142 | { Opt_nobrl, "nobrl" }, | |
143 | { Opt_nobrl, "nolock" }, | |
144 | { Opt_forcemandatorylock, "forcemandatorylock" }, | |
5cfdddcf | 145 | { Opt_forcemandatorylock, "forcemand" }, |
8830d7e0 SP |
146 | { Opt_setuids, "setuids" }, |
147 | { Opt_nosetuids, "nosetuids" }, | |
148 | { Opt_dynperm, "dynperm" }, | |
149 | { Opt_nodynperm, "nodynperm" }, | |
150 | { Opt_nohard, "nohard" }, | |
151 | { Opt_nosoft, "nosoft" }, | |
152 | { Opt_nointr, "nointr" }, | |
153 | { Opt_intr, "intr" }, | |
154 | { Opt_nostrictsync, "nostrictsync" }, | |
155 | { Opt_strictsync, "strictsync" }, | |
156 | { Opt_serverino, "serverino" }, | |
157 | { Opt_noserverino, "noserverino" }, | |
158 | { Opt_rwpidforward, "rwpidforward" }, | |
159 | { Opt_cifsacl, "cifsacl" }, | |
160 | { Opt_nocifsacl, "nocifsacl" }, | |
161 | { Opt_acl, "acl" }, | |
162 | { Opt_noacl, "noacl" }, | |
163 | { Opt_locallease, "locallease" }, | |
164 | { Opt_sign, "sign" }, | |
165 | { Opt_seal, "seal" }, | |
166 | { Opt_direct, "direct" }, | |
531c8ff0 JL |
167 | { Opt_direct, "directio" }, |
168 | { Opt_direct, "forcedirectio" }, | |
8830d7e0 SP |
169 | { Opt_strictcache, "strictcache" }, |
170 | { Opt_noac, "noac" }, | |
171 | { Opt_fsc, "fsc" }, | |
172 | { Opt_mfsymlinks, "mfsymlinks" }, | |
173 | { Opt_multiuser, "multiuser" }, | |
d8162558 | 174 | { Opt_sloppy, "sloppy" }, |
8830d7e0 SP |
175 | |
176 | { Opt_backupuid, "backupuid=%s" }, | |
177 | { Opt_backupgid, "backupgid=%s" }, | |
178 | { Opt_uid, "uid=%s" }, | |
179 | { Opt_cruid, "cruid=%s" }, | |
180 | { Opt_gid, "gid=%s" }, | |
181 | { Opt_file_mode, "file_mode=%s" }, | |
182 | { Opt_dirmode, "dirmode=%s" }, | |
183 | { Opt_dirmode, "dir_mode=%s" }, | |
184 | { Opt_port, "port=%s" }, | |
185 | { Opt_rsize, "rsize=%s" }, | |
186 | { Opt_wsize, "wsize=%s" }, | |
187 | { Opt_actimeo, "actimeo=%s" }, | |
188 | ||
4fe9e963 SP |
189 | { Opt_blank_user, "user=" }, |
190 | { Opt_blank_user, "username=" }, | |
8830d7e0 SP |
191 | { Opt_user, "user=%s" }, |
192 | { Opt_user, "username=%s" }, | |
193 | { Opt_blank_pass, "pass=" }, | |
194 | { Opt_pass, "pass=%s" }, | |
195 | { Opt_pass, "password=%s" }, | |
4fe9e963 SP |
196 | { Opt_blank_ip, "ip=" }, |
197 | { Opt_blank_ip, "addr=" }, | |
8830d7e0 SP |
198 | { Opt_ip, "ip=%s" }, |
199 | { Opt_ip, "addr=%s" }, | |
200 | { Opt_unc, "unc=%s" }, | |
201 | { Opt_unc, "target=%s" }, | |
202 | { Opt_unc, "path=%s" }, | |
203 | { Opt_domain, "dom=%s" }, | |
204 | { Opt_domain, "domain=%s" }, | |
205 | { Opt_domain, "workgroup=%s" }, | |
206 | { Opt_srcaddr, "srcaddr=%s" }, | |
207 | { Opt_prefixpath, "prefixpath=%s" }, | |
208 | { Opt_iocharset, "iocharset=%s" }, | |
209 | { Opt_sockopt, "sockopt=%s" }, | |
210 | { Opt_netbiosname, "netbiosname=%s" }, | |
211 | { Opt_servern, "servern=%s" }, | |
212 | { Opt_ver, "ver=%s" }, | |
23db65f5 | 213 | { Opt_vers, "vers=%s" }, |
8830d7e0 | 214 | { Opt_sec, "sec=%s" }, |
15b6a473 | 215 | { Opt_cache, "cache=%s" }, |
8830d7e0 SP |
216 | |
217 | { Opt_ignore, "cred" }, | |
218 | { Opt_ignore, "credentials" }, | |
a557b976 JL |
219 | { Opt_ignore, "cred=%s" }, |
220 | { Opt_ignore, "credentials=%s" }, | |
8830d7e0 SP |
221 | { Opt_ignore, "guest" }, |
222 | { Opt_ignore, "rw" }, | |
223 | { Opt_ignore, "ro" }, | |
224 | { Opt_ignore, "suid" }, | |
225 | { Opt_ignore, "nosuid" }, | |
226 | { Opt_ignore, "exec" }, | |
227 | { Opt_ignore, "noexec" }, | |
228 | { Opt_ignore, "nodev" }, | |
229 | { Opt_ignore, "noauto" }, | |
230 | { Opt_ignore, "dev" }, | |
231 | { Opt_ignore, "mand" }, | |
232 | { Opt_ignore, "nomand" }, | |
233 | { Opt_ignore, "_netdev" }, | |
234 | ||
235 | { Opt_err, NULL } | |
236 | }; | |
237 | ||
238 | enum { | |
239 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
240 | Opt_sec_ntlmsspi, Opt_sec_ntlmssp, | |
241 | Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2i, | |
242 | Opt_sec_nontlm, Opt_sec_lanman, | |
243 | Opt_sec_none, | |
244 | ||
245 | Opt_sec_err | |
246 | }; | |
247 | ||
248 | static const match_table_t cifs_secflavor_tokens = { | |
249 | { Opt_sec_krb5, "krb5" }, | |
250 | { Opt_sec_krb5i, "krb5i" }, | |
251 | { Opt_sec_krb5p, "krb5p" }, | |
252 | { Opt_sec_ntlmsspi, "ntlmsspi" }, | |
253 | { Opt_sec_ntlmssp, "ntlmssp" }, | |
254 | { Opt_ntlm, "ntlm" }, | |
255 | { Opt_sec_ntlmi, "ntlmi" }, | |
256 | { Opt_sec_ntlmv2i, "ntlmv2i" }, | |
257 | { Opt_sec_nontlm, "nontlm" }, | |
258 | { Opt_sec_lanman, "lanman" }, | |
259 | { Opt_sec_none, "none" }, | |
260 | ||
261 | { Opt_sec_err, NULL } | |
262 | }; | |
263 | ||
15b6a473 JL |
264 | /* cache flavors */ |
265 | enum { | |
266 | Opt_cache_loose, | |
267 | Opt_cache_strict, | |
268 | Opt_cache_none, | |
269 | Opt_cache_err | |
270 | }; | |
271 | ||
272 | static const match_table_t cifs_cacheflavor_tokens = { | |
273 | { Opt_cache_loose, "loose" }, | |
274 | { Opt_cache_strict, "strict" }, | |
275 | { Opt_cache_none, "none" }, | |
276 | { Opt_cache_err, NULL } | |
277 | }; | |
278 | ||
23db65f5 JL |
279 | static const match_table_t cifs_smb_version_tokens = { |
280 | { Smb_1, SMB1_VERSION_STRING }, | |
1080ef75 | 281 | { Smb_21, SMB21_VERSION_STRING }, |
23db65f5 JL |
282 | }; |
283 | ||
a9f1b85e PS |
284 | static int ip_connect(struct TCP_Server_Info *server); |
285 | static int generic_ip_connect(struct TCP_Server_Info *server); | |
b647c35f | 286 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
2de970ff | 287 | static void cifs_prune_tlinks(struct work_struct *work); |
b9bce2e9 JL |
288 | static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
289 | const char *devname); | |
1da177e4 | 290 | |
d5c5605c JL |
291 | /* |
292 | * cifs tcp session reconnection | |
293 | * | |
294 | * mark tcp session as reconnecting so temporarily locked | |
295 | * mark all smb sessions as reconnecting for tcp session | |
296 | * reconnect tcp session | |
297 | * wake up waiters on reconnection? - (not needed currently) | |
298 | */ | |
2cd646a2 | 299 | static int |
1da177e4 LT |
300 | cifs_reconnect(struct TCP_Server_Info *server) |
301 | { | |
302 | int rc = 0; | |
f1987b44 | 303 | struct list_head *tmp, *tmp2; |
96daf2b0 SF |
304 | struct cifs_ses *ses; |
305 | struct cifs_tcon *tcon; | |
fb8c4b14 | 306 | struct mid_q_entry *mid_entry; |
3c1105df | 307 | struct list_head retry_list; |
50c2f753 | 308 | |
1da177e4 | 309 | spin_lock(&GlobalMid_Lock); |
469ee614 | 310 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 311 | /* the demux thread will exit normally |
1da177e4 LT |
312 | next time through the loop */ |
313 | spin_unlock(&GlobalMid_Lock); | |
314 | return rc; | |
315 | } else | |
316 | server->tcpStatus = CifsNeedReconnect; | |
317 | spin_unlock(&GlobalMid_Lock); | |
318 | server->maxBuf = 0; | |
319 | ||
b6b38f70 | 320 | cFYI(1, "Reconnecting tcp session"); |
1da177e4 LT |
321 | |
322 | /* before reconnecting the tcp session, mark the smb session (uid) | |
323 | and the tid bad so they are not used until reconnected */ | |
2b84a36c | 324 | cFYI(1, "%s: marking sessions and tcons for reconnect", __func__); |
3f9bcca7 | 325 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 326 | list_for_each(tmp, &server->smb_ses_list) { |
96daf2b0 | 327 | ses = list_entry(tmp, struct cifs_ses, smb_ses_list); |
14fbf50d JL |
328 | ses->need_reconnect = true; |
329 | ses->ipc_tid = 0; | |
f1987b44 | 330 | list_for_each(tmp2, &ses->tcon_list) { |
96daf2b0 | 331 | tcon = list_entry(tmp2, struct cifs_tcon, tcon_list); |
3b795210 | 332 | tcon->need_reconnect = true; |
1da177e4 | 333 | } |
1da177e4 | 334 | } |
3f9bcca7 | 335 | spin_unlock(&cifs_tcp_ses_lock); |
2b84a36c | 336 | |
1da177e4 | 337 | /* do not want to be sending data on a socket we are freeing */ |
2b84a36c | 338 | cFYI(1, "%s: tearing down socket", __func__); |
72ca545b | 339 | mutex_lock(&server->srv_mutex); |
fb8c4b14 | 340 | if (server->ssocket) { |
b6b38f70 JP |
341 | cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state, |
342 | server->ssocket->flags); | |
91cf45f0 | 343 | kernel_sock_shutdown(server->ssocket, SHUT_WR); |
b6b38f70 | 344 | cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx", |
467a8f8d | 345 | server->ssocket->state, |
b6b38f70 | 346 | server->ssocket->flags); |
1da177e4 LT |
347 | sock_release(server->ssocket); |
348 | server->ssocket = NULL; | |
349 | } | |
5d0d2882 SP |
350 | server->sequence_number = 0; |
351 | server->session_estab = false; | |
21e73393 SP |
352 | kfree(server->session_key.response); |
353 | server->session_key.response = NULL; | |
354 | server->session_key.len = 0; | |
fda35943 | 355 | server->lstrp = jiffies; |
2b84a36c | 356 | mutex_unlock(&server->srv_mutex); |
1da177e4 | 357 | |
2b84a36c | 358 | /* mark submitted MIDs for retry and issue callback */ |
3c1105df JL |
359 | INIT_LIST_HEAD(&retry_list); |
360 | cFYI(1, "%s: moving mids to private list", __func__); | |
1da177e4 | 361 | spin_lock(&GlobalMid_Lock); |
2b84a36c JL |
362 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
363 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 PS |
364 | if (mid_entry->mid_state == MID_REQUEST_SUBMITTED) |
365 | mid_entry->mid_state = MID_RETRY_NEEDED; | |
3c1105df JL |
366 | list_move(&mid_entry->qhead, &retry_list); |
367 | } | |
368 | spin_unlock(&GlobalMid_Lock); | |
369 | ||
370 | cFYI(1, "%s: issuing mid callbacks", __func__); | |
371 | list_for_each_safe(tmp, tmp2, &retry_list) { | |
372 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
2b84a36c JL |
373 | list_del_init(&mid_entry->qhead); |
374 | mid_entry->callback(mid_entry); | |
1da177e4 | 375 | } |
1da177e4 | 376 | |
7fdbaa1b | 377 | do { |
6c3d8909 | 378 | try_to_freeze(); |
a9f1b85e PS |
379 | |
380 | /* we should try only the port we connected to before */ | |
381 | rc = generic_ip_connect(server); | |
fb8c4b14 | 382 | if (rc) { |
b6b38f70 | 383 | cFYI(1, "reconnect error %d", rc); |
0cb766ae | 384 | msleep(3000); |
1da177e4 LT |
385 | } else { |
386 | atomic_inc(&tcpSesReconnectCount); | |
387 | spin_lock(&GlobalMid_Lock); | |
469ee614 | 388 | if (server->tcpStatus != CifsExiting) |
fd88ce93 | 389 | server->tcpStatus = CifsNeedNegotiate; |
fb8c4b14 | 390 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 391 | } |
7fdbaa1b | 392 | } while (server->tcpStatus == CifsNeedReconnect); |
2b84a36c | 393 | |
1da177e4 LT |
394 | return rc; |
395 | } | |
396 | ||
fb8c4b14 | 397 | /* |
e4eb295d SF |
398 | return codes: |
399 | 0 not a transact2, or all data present | |
400 | >0 transact2 with that much data missing | |
401 | -EINVAL = invalid transact2 | |
402 | ||
403 | */ | |
d4e4854f | 404 | static int check2ndT2(char *buf) |
e4eb295d | 405 | { |
d4e4854f | 406 | struct smb_hdr *pSMB = (struct smb_hdr *)buf; |
fb8c4b14 | 407 | struct smb_t2_rsp *pSMBt; |
e4eb295d | 408 | int remaining; |
26ec2548 | 409 | __u16 total_data_size, data_in_this_rsp; |
e4eb295d | 410 | |
fb8c4b14 | 411 | if (pSMB->Command != SMB_COM_TRANSACTION2) |
e4eb295d SF |
412 | return 0; |
413 | ||
fb8c4b14 SF |
414 | /* check for plausible wct, bcc and t2 data and parm sizes */ |
415 | /* check for parm and data offset going beyond end of smb */ | |
416 | if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */ | |
b6b38f70 | 417 | cFYI(1, "invalid transact2 word count"); |
e4eb295d SF |
418 | return -EINVAL; |
419 | } | |
420 | ||
421 | pSMBt = (struct smb_t2_rsp *)pSMB; | |
422 | ||
26ec2548 JL |
423 | total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); |
424 | data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); | |
e4eb295d | 425 | |
c0c7b905 | 426 | if (total_data_size == data_in_this_rsp) |
e4eb295d | 427 | return 0; |
c0c7b905 | 428 | else if (total_data_size < data_in_this_rsp) { |
b6b38f70 JP |
429 | cFYI(1, "total data %d smaller than data in frame %d", |
430 | total_data_size, data_in_this_rsp); | |
e4eb295d | 431 | return -EINVAL; |
e4eb295d | 432 | } |
c0c7b905 JL |
433 | |
434 | remaining = total_data_size - data_in_this_rsp; | |
435 | ||
436 | cFYI(1, "missing %d bytes from transact2, check next response", | |
437 | remaining); | |
c974befa | 438 | if (total_data_size > CIFSMaxBufSize) { |
c0c7b905 | 439 | cERROR(1, "TotalDataSize %d is over maximum buffer %d", |
c974befa | 440 | total_data_size, CIFSMaxBufSize); |
c0c7b905 JL |
441 | return -EINVAL; |
442 | } | |
443 | return remaining; | |
e4eb295d SF |
444 | } |
445 | ||
d4e4854f | 446 | static int coalesce_t2(char *second_buf, struct smb_hdr *target_hdr) |
e4eb295d | 447 | { |
d4e4854f PS |
448 | struct smb_t2_rsp *pSMBs = (struct smb_t2_rsp *)second_buf; |
449 | struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)target_hdr; | |
f5fffcee JL |
450 | char *data_area_of_tgt; |
451 | char *data_area_of_src; | |
26ec2548 | 452 | int remaining; |
f5fffcee JL |
453 | unsigned int byte_count, total_in_tgt; |
454 | __u16 tgt_total_cnt, src_total_cnt, total_in_src; | |
e4eb295d | 455 | |
f5fffcee JL |
456 | src_total_cnt = get_unaligned_le16(&pSMBs->t2_rsp.TotalDataCount); |
457 | tgt_total_cnt = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); | |
e4eb295d | 458 | |
f5fffcee JL |
459 | if (tgt_total_cnt != src_total_cnt) |
460 | cFYI(1, "total data count of primary and secondary t2 differ " | |
461 | "source=%hu target=%hu", src_total_cnt, tgt_total_cnt); | |
e4eb295d | 462 | |
f5fffcee | 463 | total_in_tgt = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); |
e4eb295d | 464 | |
f5fffcee | 465 | remaining = tgt_total_cnt - total_in_tgt; |
50c2f753 | 466 | |
f5fffcee JL |
467 | if (remaining < 0) { |
468 | cFYI(1, "Server sent too much data. tgt_total_cnt=%hu " | |
469 | "total_in_tgt=%hu", tgt_total_cnt, total_in_tgt); | |
2a2047bc | 470 | return -EPROTO; |
f5fffcee | 471 | } |
e4eb295d | 472 | |
f5fffcee JL |
473 | if (remaining == 0) { |
474 | /* nothing to do, ignore */ | |
475 | cFYI(1, "no more data remains"); | |
e4eb295d | 476 | return 0; |
f5fffcee | 477 | } |
50c2f753 | 478 | |
f5fffcee JL |
479 | total_in_src = get_unaligned_le16(&pSMBs->t2_rsp.DataCount); |
480 | if (remaining < total_in_src) | |
b6b38f70 | 481 | cFYI(1, "transact2 2nd response contains too much data"); |
e4eb295d SF |
482 | |
483 | /* find end of first SMB data area */ | |
f5fffcee | 484 | data_area_of_tgt = (char *)&pSMBt->hdr.Protocol + |
26ec2548 | 485 | get_unaligned_le16(&pSMBt->t2_rsp.DataOffset); |
e4eb295d | 486 | |
f5fffcee JL |
487 | /* validate target area */ |
488 | data_area_of_src = (char *)&pSMBs->hdr.Protocol + | |
489 | get_unaligned_le16(&pSMBs->t2_rsp.DataOffset); | |
e4eb295d | 490 | |
f5fffcee | 491 | data_area_of_tgt += total_in_tgt; |
e4eb295d | 492 | |
f5fffcee | 493 | total_in_tgt += total_in_src; |
2a2047bc | 494 | /* is the result too big for the field? */ |
f5fffcee JL |
495 | if (total_in_tgt > USHRT_MAX) { |
496 | cFYI(1, "coalesced DataCount too large (%u)", total_in_tgt); | |
2a2047bc | 497 | return -EPROTO; |
f5fffcee JL |
498 | } |
499 | put_unaligned_le16(total_in_tgt, &pSMBt->t2_rsp.DataCount); | |
2a2047bc JL |
500 | |
501 | /* fix up the BCC */ | |
d4e4854f | 502 | byte_count = get_bcc(target_hdr); |
f5fffcee | 503 | byte_count += total_in_src; |
2a2047bc | 504 | /* is the result too big for the field? */ |
f5fffcee JL |
505 | if (byte_count > USHRT_MAX) { |
506 | cFYI(1, "coalesced BCC too large (%u)", byte_count); | |
2a2047bc | 507 | return -EPROTO; |
f5fffcee | 508 | } |
d4e4854f | 509 | put_bcc(byte_count, target_hdr); |
e4eb295d | 510 | |
d4e4854f | 511 | byte_count = be32_to_cpu(target_hdr->smb_buf_length); |
f5fffcee | 512 | byte_count += total_in_src; |
2a2047bc | 513 | /* don't allow buffer to overflow */ |
f5fffcee JL |
514 | if (byte_count > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) { |
515 | cFYI(1, "coalesced BCC exceeds buffer size (%u)", byte_count); | |
2a2047bc | 516 | return -ENOBUFS; |
f5fffcee | 517 | } |
d4e4854f | 518 | target_hdr->smb_buf_length = cpu_to_be32(byte_count); |
e4eb295d | 519 | |
f5fffcee JL |
520 | /* copy second buffer into end of first buffer */ |
521 | memcpy(data_area_of_tgt, data_area_of_src, total_in_src); | |
2a2047bc | 522 | |
f5fffcee JL |
523 | if (remaining != total_in_src) { |
524 | /* more responses to go */ | |
525 | cFYI(1, "waiting for more secondary responses"); | |
e4eb295d | 526 | return 1; |
f5fffcee JL |
527 | } |
528 | ||
529 | /* we are done */ | |
530 | cFYI(1, "found the last secondary response"); | |
531 | return 0; | |
e4eb295d SF |
532 | } |
533 | ||
c74093b6 JL |
534 | static void |
535 | cifs_echo_request(struct work_struct *work) | |
536 | { | |
537 | int rc; | |
538 | struct TCP_Server_Info *server = container_of(work, | |
539 | struct TCP_Server_Info, echo.work); | |
540 | ||
247ec9b4 | 541 | /* |
195291e6 JL |
542 | * We cannot send an echo until the NEGOTIATE_PROTOCOL request is |
543 | * done, which is indicated by maxBuf != 0. Also, no need to ping if | |
544 | * we got a response recently | |
247ec9b4 | 545 | */ |
195291e6 | 546 | if (server->maxBuf == 0 || |
247ec9b4 | 547 | time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ)) |
c74093b6 JL |
548 | goto requeue_echo; |
549 | ||
550 | rc = CIFSSMBEcho(server); | |
551 | if (rc) | |
552 | cFYI(1, "Unable to send echo request to server: %s", | |
553 | server->hostname); | |
554 | ||
555 | requeue_echo: | |
da472fc8 | 556 | queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL); |
c74093b6 JL |
557 | } |
558 | ||
3d9c2472 | 559 | static bool |
2a37ef94 | 560 | allocate_buffers(struct TCP_Server_Info *server) |
3d9c2472 | 561 | { |
2a37ef94 JL |
562 | if (!server->bigbuf) { |
563 | server->bigbuf = (char *)cifs_buf_get(); | |
564 | if (!server->bigbuf) { | |
3d9c2472 PS |
565 | cERROR(1, "No memory for large SMB response"); |
566 | msleep(3000); | |
567 | /* retry will check if exiting */ | |
568 | return false; | |
569 | } | |
2a37ef94 | 570 | } else if (server->large_buf) { |
3d9c2472 | 571 | /* we are reusing a dirty large buf, clear its start */ |
1887f601 | 572 | memset(server->bigbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
573 | } |
574 | ||
2a37ef94 JL |
575 | if (!server->smallbuf) { |
576 | server->smallbuf = (char *)cifs_small_buf_get(); | |
577 | if (!server->smallbuf) { | |
3d9c2472 PS |
578 | cERROR(1, "No memory for SMB response"); |
579 | msleep(1000); | |
580 | /* retry will check if exiting */ | |
581 | return false; | |
582 | } | |
583 | /* beginning of smb buffer is cleared in our buf_get */ | |
584 | } else { | |
585 | /* if existing small buf clear beginning */ | |
1887f601 | 586 | memset(server->smallbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
587 | } |
588 | ||
3d9c2472 PS |
589 | return true; |
590 | } | |
591 | ||
ba749e6d JL |
592 | static bool |
593 | server_unresponsive(struct TCP_Server_Info *server) | |
594 | { | |
6dae51a5 PS |
595 | /* |
596 | * We need to wait 2 echo intervals to make sure we handle such | |
597 | * situations right: | |
598 | * 1s client sends a normal SMB request | |
599 | * 2s client gets a response | |
600 | * 30s echo workqueue job pops, and decides we got a response recently | |
601 | * and don't need to send another | |
602 | * ... | |
603 | * 65s kernel_recvmsg times out, and we see that we haven't gotten | |
604 | * a response in >60s. | |
605 | */ | |
606 | if (server->tcpStatus == CifsGood && | |
607 | time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) { | |
ba749e6d JL |
608 | cERROR(1, "Server %s has not responded in %d seconds. " |
609 | "Reconnecting...", server->hostname, | |
6dae51a5 | 610 | (2 * SMB_ECHO_INTERVAL) / HZ); |
ba749e6d JL |
611 | cifs_reconnect(server); |
612 | wake_up(&server->response_q); | |
613 | return true; | |
614 | } | |
615 | ||
616 | return false; | |
617 | } | |
618 | ||
42c4dfc2 JL |
619 | /* |
620 | * kvec_array_init - clone a kvec array, and advance into it | |
621 | * @new: pointer to memory for cloned array | |
622 | * @iov: pointer to original array | |
623 | * @nr_segs: number of members in original array | |
624 | * @bytes: number of bytes to advance into the cloned array | |
625 | * | |
626 | * This function will copy the array provided in iov to a section of memory | |
627 | * and advance the specified number of bytes into the new array. It returns | |
628 | * the number of segments in the new array. "new" must be at least as big as | |
629 | * the original iov array. | |
630 | */ | |
631 | static unsigned int | |
632 | kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs, | |
633 | size_t bytes) | |
634 | { | |
635 | size_t base = 0; | |
636 | ||
637 | while (bytes || !iov->iov_len) { | |
638 | int copy = min(bytes, iov->iov_len); | |
639 | ||
640 | bytes -= copy; | |
641 | base += copy; | |
642 | if (iov->iov_len == base) { | |
643 | iov++; | |
644 | nr_segs--; | |
645 | base = 0; | |
646 | } | |
647 | } | |
648 | memcpy(new, iov, sizeof(*iov) * nr_segs); | |
649 | new->iov_base += base; | |
650 | new->iov_len -= base; | |
651 | return nr_segs; | |
652 | } | |
653 | ||
1041e3f9 JL |
654 | static struct kvec * |
655 | get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs) | |
e7015fb1 | 656 | { |
1041e3f9 JL |
657 | struct kvec *new_iov; |
658 | ||
659 | if (server->iov && nr_segs <= server->nr_iov) | |
660 | return server->iov; | |
661 | ||
662 | /* not big enough -- allocate a new one and release the old */ | |
663 | new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS); | |
664 | if (new_iov) { | |
665 | kfree(server->iov); | |
666 | server->iov = new_iov; | |
667 | server->nr_iov = nr_segs; | |
668 | } | |
669 | return new_iov; | |
670 | } | |
671 | ||
e28bc5b1 JL |
672 | int |
673 | cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig, | |
674 | unsigned int nr_segs, unsigned int to_read) | |
e7015fb1 | 675 | { |
a52c1eb7 JL |
676 | int length = 0; |
677 | int total_read; | |
42c4dfc2 | 678 | unsigned int segs; |
e831e6cf | 679 | struct msghdr smb_msg; |
42c4dfc2 JL |
680 | struct kvec *iov; |
681 | ||
1041e3f9 | 682 | iov = get_server_iovec(server, nr_segs); |
42c4dfc2 JL |
683 | if (!iov) |
684 | return -ENOMEM; | |
e7015fb1 | 685 | |
e831e6cf JL |
686 | smb_msg.msg_control = NULL; |
687 | smb_msg.msg_controllen = 0; | |
688 | ||
a52c1eb7 | 689 | for (total_read = 0; to_read; total_read += length, to_read -= length) { |
95edcff4 JL |
690 | try_to_freeze(); |
691 | ||
ba749e6d | 692 | if (server_unresponsive(server)) { |
a52c1eb7 | 693 | total_read = -EAGAIN; |
ba749e6d JL |
694 | break; |
695 | } | |
696 | ||
42c4dfc2 JL |
697 | segs = kvec_array_init(iov, iov_orig, nr_segs, total_read); |
698 | ||
699 | length = kernel_recvmsg(server->ssocket, &smb_msg, | |
700 | iov, segs, to_read, 0); | |
e7015fb1 | 701 | |
e7015fb1 | 702 | if (server->tcpStatus == CifsExiting) { |
a52c1eb7 | 703 | total_read = -ESHUTDOWN; |
e7015fb1 PS |
704 | break; |
705 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
706 | cifs_reconnect(server); | |
a52c1eb7 | 707 | total_read = -EAGAIN; |
e7015fb1 PS |
708 | break; |
709 | } else if (length == -ERESTARTSYS || | |
710 | length == -EAGAIN || | |
711 | length == -EINTR) { | |
712 | /* | |
713 | * Minimum sleep to prevent looping, allowing socket | |
714 | * to clear and app threads to set tcpStatus | |
715 | * CifsNeedReconnect if server hung. | |
716 | */ | |
717 | usleep_range(1000, 2000); | |
718 | length = 0; | |
a52c1eb7 | 719 | continue; |
e7015fb1 | 720 | } else if (length <= 0) { |
a52c1eb7 JL |
721 | cFYI(1, "Received no data or error: expecting %d " |
722 | "got %d", to_read, length); | |
e7015fb1 | 723 | cifs_reconnect(server); |
a52c1eb7 | 724 | total_read = -EAGAIN; |
e7015fb1 PS |
725 | break; |
726 | } | |
727 | } | |
a52c1eb7 | 728 | return total_read; |
e7015fb1 | 729 | } |
e7015fb1 | 730 | |
e28bc5b1 JL |
731 | int |
732 | cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, | |
733 | unsigned int to_read) | |
42c4dfc2 JL |
734 | { |
735 | struct kvec iov; | |
736 | ||
737 | iov.iov_base = buf; | |
738 | iov.iov_len = to_read; | |
739 | ||
e28bc5b1 | 740 | return cifs_readv_from_socket(server, &iov, 1, to_read); |
e7015fb1 PS |
741 | } |
742 | ||
98bac62c | 743 | static bool |
fe11e4cc | 744 | is_smb_response(struct TCP_Server_Info *server, unsigned char type) |
98bac62c | 745 | { |
98bac62c PS |
746 | /* |
747 | * The first byte big endian of the length field, | |
748 | * is actually not part of the length but the type | |
749 | * with the most common, zero, as regular data. | |
750 | */ | |
fe11e4cc JL |
751 | switch (type) { |
752 | case RFC1002_SESSION_MESSAGE: | |
753 | /* Regular SMB response */ | |
754 | return true; | |
755 | case RFC1002_SESSION_KEEP_ALIVE: | |
756 | cFYI(1, "RFC 1002 session keep alive"); | |
757 | break; | |
758 | case RFC1002_POSITIVE_SESSION_RESPONSE: | |
759 | cFYI(1, "RFC 1002 positive session response"); | |
760 | break; | |
761 | case RFC1002_NEGATIVE_SESSION_RESPONSE: | |
98bac62c PS |
762 | /* |
763 | * We get this from Windows 98 instead of an error on | |
764 | * SMB negprot response. | |
765 | */ | |
fe11e4cc | 766 | cFYI(1, "RFC 1002 negative session response"); |
98bac62c PS |
767 | /* give server a second to clean up */ |
768 | msleep(1000); | |
769 | /* | |
770 | * Always try 445 first on reconnect since we get NACK | |
771 | * on some if we ever connected to port 139 (the NACK | |
772 | * is since we do not begin with RFC1001 session | |
773 | * initialize frame). | |
774 | */ | |
fe11e4cc | 775 | cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT); |
98bac62c PS |
776 | cifs_reconnect(server); |
777 | wake_up(&server->response_q); | |
fe11e4cc JL |
778 | break; |
779 | default: | |
780 | cERROR(1, "RFC 1002 unknown response type 0x%x", type); | |
98bac62c | 781 | cifs_reconnect(server); |
98bac62c PS |
782 | } |
783 | ||
fe11e4cc | 784 | return false; |
98bac62c PS |
785 | } |
786 | ||
e28bc5b1 JL |
787 | void |
788 | dequeue_mid(struct mid_q_entry *mid, bool malformed) | |
ea1f4502 | 789 | { |
ad69bae1 | 790 | #ifdef CONFIG_CIFS_STATS2 |
ea1f4502 | 791 | mid->when_received = jiffies; |
ad69bae1 | 792 | #endif |
ea1f4502 JL |
793 | spin_lock(&GlobalMid_Lock); |
794 | if (!malformed) | |
7c9421e1 | 795 | mid->mid_state = MID_RESPONSE_RECEIVED; |
ea1f4502 | 796 | else |
7c9421e1 | 797 | mid->mid_state = MID_RESPONSE_MALFORMED; |
ea1f4502 | 798 | list_del_init(&mid->qhead); |
ad69bae1 | 799 | spin_unlock(&GlobalMid_Lock); |
ea1f4502 | 800 | } |
ad69bae1 | 801 | |
c8054ebd JL |
802 | static void |
803 | handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, | |
d4e4854f | 804 | char *buf, int malformed) |
ea1f4502 | 805 | { |
ffc00e27 JL |
806 | if (malformed == 0 && check2ndT2(buf) > 0) { |
807 | mid->multiRsp = true; | |
ea1f4502 JL |
808 | if (mid->resp_buf) { |
809 | /* merge response - fix up 1st*/ | |
ffc00e27 JL |
810 | malformed = coalesce_t2(buf, mid->resp_buf); |
811 | if (malformed > 0) | |
c8054ebd | 812 | return; |
ffc00e27 | 813 | |
ea1f4502 JL |
814 | /* All parts received or packet is malformed. */ |
815 | mid->multiEnd = true; | |
c8054ebd | 816 | return dequeue_mid(mid, malformed); |
ea1f4502 | 817 | } |
2a37ef94 | 818 | if (!server->large_buf) { |
ea1f4502 JL |
819 | /*FIXME: switch to already allocated largebuf?*/ |
820 | cERROR(1, "1st trans2 resp needs bigbuf"); | |
821 | } else { | |
822 | /* Have first buffer */ | |
823 | mid->resp_buf = buf; | |
7c9421e1 | 824 | mid->large_buf = true; |
2a37ef94 | 825 | server->bigbuf = NULL; |
ea1f4502 | 826 | } |
c8054ebd | 827 | return; |
ea1f4502 JL |
828 | } |
829 | mid->resp_buf = buf; | |
7c9421e1 | 830 | mid->large_buf = server->large_buf; |
2a37ef94 JL |
831 | /* Was previous buf put in mpx struct for multi-rsp? */ |
832 | if (!mid->multiRsp) { | |
833 | /* smb buffer will be freed by user thread */ | |
834 | if (server->large_buf) | |
835 | server->bigbuf = NULL; | |
836 | else | |
837 | server->smallbuf = NULL; | |
838 | } | |
ffc00e27 | 839 | dequeue_mid(mid, malformed); |
ad69bae1 PS |
840 | } |
841 | ||
762dfd10 PS |
842 | static void clean_demultiplex_info(struct TCP_Server_Info *server) |
843 | { | |
844 | int length; | |
845 | ||
846 | /* take it off the list, if it's not already */ | |
847 | spin_lock(&cifs_tcp_ses_lock); | |
848 | list_del_init(&server->tcp_ses_list); | |
849 | spin_unlock(&cifs_tcp_ses_lock); | |
850 | ||
851 | spin_lock(&GlobalMid_Lock); | |
852 | server->tcpStatus = CifsExiting; | |
853 | spin_unlock(&GlobalMid_Lock); | |
854 | wake_up_all(&server->response_q); | |
855 | ||
2d86dbc9 | 856 | /* check if we have blocked requests that need to free */ |
fc40f9cf | 857 | spin_lock(&server->req_lock); |
2d86dbc9 PS |
858 | if (server->credits <= 0) |
859 | server->credits = 1; | |
fc40f9cf | 860 | spin_unlock(&server->req_lock); |
762dfd10 PS |
861 | /* |
862 | * Although there should not be any requests blocked on this queue it | |
863 | * can not hurt to be paranoid and try to wake up requests that may | |
864 | * haven been blocked when more than 50 at time were on the wire to the | |
865 | * same server - they now will see the session is in exit state and get | |
866 | * out of SendReceive. | |
867 | */ | |
868 | wake_up_all(&server->request_q); | |
869 | /* give those requests time to exit */ | |
870 | msleep(125); | |
871 | ||
872 | if (server->ssocket) { | |
873 | sock_release(server->ssocket); | |
874 | server->ssocket = NULL; | |
875 | } | |
876 | ||
877 | if (!list_empty(&server->pending_mid_q)) { | |
878 | struct list_head dispose_list; | |
879 | struct mid_q_entry *mid_entry; | |
880 | struct list_head *tmp, *tmp2; | |
881 | ||
882 | INIT_LIST_HEAD(&dispose_list); | |
883 | spin_lock(&GlobalMid_Lock); | |
884 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { | |
885 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 PS |
886 | cFYI(1, "Clearing mid 0x%llx", mid_entry->mid); |
887 | mid_entry->mid_state = MID_SHUTDOWN; | |
762dfd10 PS |
888 | list_move(&mid_entry->qhead, &dispose_list); |
889 | } | |
890 | spin_unlock(&GlobalMid_Lock); | |
891 | ||
892 | /* now walk dispose list and issue callbacks */ | |
893 | list_for_each_safe(tmp, tmp2, &dispose_list) { | |
894 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 | 895 | cFYI(1, "Callback mid 0x%llx", mid_entry->mid); |
762dfd10 PS |
896 | list_del_init(&mid_entry->qhead); |
897 | mid_entry->callback(mid_entry); | |
898 | } | |
899 | /* 1/8th of sec is more than enough time for them to exit */ | |
900 | msleep(125); | |
901 | } | |
902 | ||
903 | if (!list_empty(&server->pending_mid_q)) { | |
904 | /* | |
905 | * mpx threads have not exited yet give them at least the smb | |
906 | * send timeout time for long ops. | |
907 | * | |
908 | * Due to delays on oplock break requests, we need to wait at | |
909 | * least 45 seconds before giving up on a request getting a | |
910 | * response and going ahead and killing cifsd. | |
911 | */ | |
912 | cFYI(1, "Wait for exit from demultiplex thread"); | |
913 | msleep(46000); | |
914 | /* | |
915 | * If threads still have not exited they are probably never | |
916 | * coming home not much else we can do but free the memory. | |
917 | */ | |
918 | } | |
919 | ||
920 | kfree(server->hostname); | |
1041e3f9 | 921 | kfree(server->iov); |
762dfd10 PS |
922 | kfree(server); |
923 | ||
924 | length = atomic_dec_return(&tcpSesAllocCount); | |
925 | if (length > 0) | |
926 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, | |
927 | GFP_KERNEL); | |
928 | } | |
929 | ||
e9097ab4 JL |
930 | static int |
931 | standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
932 | { | |
933 | int length; | |
934 | char *buf = server->smallbuf; | |
d4e4854f | 935 | unsigned int pdu_length = get_rfc1002_length(buf); |
e9097ab4 JL |
936 | |
937 | /* make sure this will fit in a large buffer */ | |
1887f601 | 938 | if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) { |
e9097ab4 JL |
939 | cERROR(1, "SMB response too long (%u bytes)", |
940 | pdu_length); | |
941 | cifs_reconnect(server); | |
942 | wake_up(&server->response_q); | |
943 | return -EAGAIN; | |
944 | } | |
945 | ||
946 | /* switch to large buffer if too big for a small one */ | |
947 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { | |
948 | server->large_buf = true; | |
d4e4854f | 949 | memcpy(server->bigbuf, buf, server->total_read); |
e9097ab4 | 950 | buf = server->bigbuf; |
e9097ab4 JL |
951 | } |
952 | ||
953 | /* now read the rest */ | |
1887f601 PS |
954 | length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, |
955 | pdu_length - HEADER_SIZE(server) + 1 + 4); | |
e9097ab4 JL |
956 | if (length < 0) |
957 | return length; | |
958 | server->total_read += length; | |
959 | ||
d4e4854f | 960 | dump_smb(buf, server->total_read); |
e9097ab4 JL |
961 | |
962 | /* | |
963 | * We know that we received enough to get to the MID as we | |
964 | * checked the pdu_length earlier. Now check to see | |
965 | * if the rest of the header is OK. We borrow the length | |
966 | * var for the rest of the loop to avoid a new stack var. | |
967 | * | |
968 | * 48 bytes is enough to display the header and a little bit | |
969 | * into the payload for debugging purposes. | |
970 | */ | |
8aa26f3e | 971 | length = server->ops->check_message(buf, server->total_read); |
e9097ab4 JL |
972 | if (length != 0) |
973 | cifs_dump_mem("Bad SMB: ", buf, | |
974 | min_t(unsigned int, server->total_read, 48)); | |
975 | ||
ff4fa4a2 JL |
976 | if (!mid) |
977 | return length; | |
e9097ab4 | 978 | |
d4e4854f | 979 | handle_mid(mid, server, buf, length); |
ff4fa4a2 | 980 | return 0; |
e9097ab4 JL |
981 | } |
982 | ||
1da177e4 | 983 | static int |
7c97c200 | 984 | cifs_demultiplex_thread(void *p) |
1da177e4 LT |
985 | { |
986 | int length; | |
7c97c200 | 987 | struct TCP_Server_Info *server = p; |
2a37ef94 JL |
988 | unsigned int pdu_length; |
989 | char *buf = NULL; | |
1da177e4 LT |
990 | struct task_struct *task_to_wake = NULL; |
991 | struct mid_q_entry *mid_entry; | |
1da177e4 | 992 | |
1da177e4 | 993 | current->flags |= PF_MEMALLOC; |
b6b38f70 | 994 | cFYI(1, "Demultiplex PID: %d", task_pid_nr(current)); |
93d0ec85 JL |
995 | |
996 | length = atomic_inc_return(&tcpSesAllocCount); | |
997 | if (length > 1) | |
26f57364 SF |
998 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, |
999 | GFP_KERNEL); | |
1da177e4 | 1000 | |
83144186 | 1001 | set_freezable(); |
469ee614 | 1002 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
1003 | if (try_to_freeze()) |
1004 | continue; | |
b8643e1b | 1005 | |
2a37ef94 | 1006 | if (!allocate_buffers(server)) |
3d9c2472 | 1007 | continue; |
b8643e1b | 1008 | |
2a37ef94 | 1009 | server->large_buf = false; |
2a37ef94 | 1010 | buf = server->smallbuf; |
f01d5e14 | 1011 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 1012 | |
e28bc5b1 | 1013 | length = cifs_read_from_socket(server, buf, pdu_length); |
a52c1eb7 | 1014 | if (length < 0) |
1da177e4 | 1015 | continue; |
2a37ef94 | 1016 | server->total_read = length; |
1da177e4 | 1017 | |
98bac62c PS |
1018 | /* |
1019 | * The right amount was read from socket - 4 bytes, | |
1020 | * so we can now interpret the length field. | |
1021 | */ | |
d4e4854f | 1022 | pdu_length = get_rfc1002_length(buf); |
70ca734a | 1023 | |
fe11e4cc JL |
1024 | cFYI(1, "RFC1002 header 0x%x", pdu_length); |
1025 | if (!is_smb_response(server, buf[0])) | |
fb8c4b14 | 1026 | continue; |
e4eb295d | 1027 | |
89482a56 | 1028 | /* make sure we have enough to get to the MID */ |
1887f601 | 1029 | if (pdu_length < HEADER_SIZE(server) - 1 - 4) { |
89482a56 JL |
1030 | cERROR(1, "SMB response too short (%u bytes)", |
1031 | pdu_length); | |
1032 | cifs_reconnect(server); | |
1033 | wake_up(&server->response_q); | |
1034 | continue; | |
e4eb295d | 1035 | } |
e7015fb1 | 1036 | |
89482a56 | 1037 | /* read down to the MID */ |
e28bc5b1 | 1038 | length = cifs_read_from_socket(server, buf + 4, |
1887f601 | 1039 | HEADER_SIZE(server) - 1 - 4); |
89482a56 | 1040 | if (length < 0) |
e4eb295d | 1041 | continue; |
2a37ef94 | 1042 | server->total_read += length; |
1da177e4 | 1043 | |
8aa26f3e | 1044 | mid_entry = server->ops->find_mid(server, buf); |
50c2f753 | 1045 | |
44d22d84 JL |
1046 | if (!mid_entry || !mid_entry->receive) |
1047 | length = standard_receive3(server, mid_entry); | |
1048 | else | |
1049 | length = mid_entry->receive(server, mid_entry); | |
71823baf | 1050 | |
e9097ab4 | 1051 | if (length < 0) |
fe11e4cc | 1052 | continue; |
1da177e4 | 1053 | |
d4e4854f | 1054 | if (server->large_buf) |
2a37ef94 | 1055 | buf = server->bigbuf; |
fda35943 | 1056 | |
fda35943 | 1057 | server->lstrp = jiffies; |
2b84a36c | 1058 | if (mid_entry != NULL) { |
2a37ef94 JL |
1059 | if (!mid_entry->multiRsp || mid_entry->multiEnd) |
1060 | mid_entry->callback(mid_entry); | |
7f0adb53 PS |
1061 | } else if (!server->ops->is_oplock_break || |
1062 | !server->ops->is_oplock_break(buf, server)) { | |
b6b38f70 | 1063 | cERROR(1, "No task to wake, unknown frame received! " |
8097531a | 1064 | "NumMids %d", atomic_read(&midCount)); |
1887f601 PS |
1065 | cifs_dump_mem("Received Data is: ", buf, |
1066 | HEADER_SIZE(server)); | |
3979877e | 1067 | #ifdef CONFIG_CIFS_DEBUG2 |
7f0adb53 PS |
1068 | if (server->ops->dump_detail) |
1069 | server->ops->dump_detail(buf); | |
3979877e SF |
1070 | cifs_dump_mids(server); |
1071 | #endif /* CIFS_DEBUG2 */ | |
50c2f753 | 1072 | |
e4eb295d SF |
1073 | } |
1074 | } /* end while !EXITING */ | |
1075 | ||
fd62cb7e | 1076 | /* buffer usually freed in free_mid - need to free it here on exit */ |
2a37ef94 JL |
1077 | cifs_buf_release(server->bigbuf); |
1078 | if (server->smallbuf) /* no sense logging a debug message if NULL */ | |
1079 | cifs_small_buf_release(server->smallbuf); | |
1da177e4 | 1080 | |
b1c8d2b4 | 1081 | task_to_wake = xchg(&server->tsk, NULL); |
762dfd10 | 1082 | clean_demultiplex_info(server); |
50c2f753 | 1083 | |
b1c8d2b4 JL |
1084 | /* if server->tsk was NULL then wait for a signal before exiting */ |
1085 | if (!task_to_wake) { | |
1086 | set_current_state(TASK_INTERRUPTIBLE); | |
1087 | while (!signal_pending(current)) { | |
1088 | schedule(); | |
1089 | set_current_state(TASK_INTERRUPTIBLE); | |
1090 | } | |
1091 | set_current_state(TASK_RUNNING); | |
1092 | } | |
1093 | ||
0468a2cf | 1094 | module_put_and_exit(0); |
1da177e4 LT |
1095 | } |
1096 | ||
c359cf3c JL |
1097 | /* extract the host portion of the UNC string */ |
1098 | static char * | |
1099 | extract_hostname(const char *unc) | |
1100 | { | |
1101 | const char *src; | |
1102 | char *dst, *delim; | |
1103 | unsigned int len; | |
1104 | ||
1105 | /* skip double chars at beginning of string */ | |
1106 | /* BB: check validity of these bytes? */ | |
1107 | src = unc + 2; | |
1108 | ||
1109 | /* delimiter between hostname and sharename is always '\\' now */ | |
1110 | delim = strchr(src, '\\'); | |
1111 | if (!delim) | |
1112 | return ERR_PTR(-EINVAL); | |
1113 | ||
1114 | len = delim - src; | |
1115 | dst = kmalloc((len + 1), GFP_KERNEL); | |
1116 | if (dst == NULL) | |
1117 | return ERR_PTR(-ENOMEM); | |
1118 | ||
1119 | memcpy(dst, src, len); | |
1120 | dst[len] = '\0'; | |
1121 | ||
1122 | return dst; | |
1123 | } | |
1124 | ||
8830d7e0 SP |
1125 | static int get_option_ul(substring_t args[], unsigned long *option) |
1126 | { | |
1127 | int rc; | |
1128 | char *string; | |
1129 | ||
1130 | string = match_strdup(args); | |
1131 | if (string == NULL) | |
1132 | return -ENOMEM; | |
bfa890a3 | 1133 | rc = kstrtoul(string, 0, option); |
8830d7e0 SP |
1134 | kfree(string); |
1135 | ||
1136 | return rc; | |
1137 | } | |
1138 | ||
1139 | ||
1140 | static int cifs_parse_security_flavors(char *value, | |
1141 | struct smb_vol *vol) | |
1142 | { | |
1143 | ||
1144 | substring_t args[MAX_OPT_ARGS]; | |
1145 | ||
1146 | switch (match_token(value, cifs_secflavor_tokens, args)) { | |
1147 | case Opt_sec_krb5: | |
1148 | vol->secFlg |= CIFSSEC_MAY_KRB5; | |
1149 | break; | |
1150 | case Opt_sec_krb5i: | |
1151 | vol->secFlg |= CIFSSEC_MAY_KRB5 | CIFSSEC_MUST_SIGN; | |
1152 | break; | |
1153 | case Opt_sec_krb5p: | |
1154 | /* vol->secFlg |= CIFSSEC_MUST_SEAL | CIFSSEC_MAY_KRB5; */ | |
1155 | cERROR(1, "Krb5 cifs privacy not supported"); | |
1156 | break; | |
1157 | case Opt_sec_ntlmssp: | |
1158 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP; | |
1159 | break; | |
1160 | case Opt_sec_ntlmsspi: | |
1161 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP | CIFSSEC_MUST_SIGN; | |
1162 | break; | |
1163 | case Opt_ntlm: | |
1164 | /* ntlm is default so can be turned off too */ | |
1165 | vol->secFlg |= CIFSSEC_MAY_NTLM; | |
1166 | break; | |
1167 | case Opt_sec_ntlmi: | |
1168 | vol->secFlg |= CIFSSEC_MAY_NTLM | CIFSSEC_MUST_SIGN; | |
1169 | break; | |
1170 | case Opt_sec_nontlm: | |
1171 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; | |
1172 | break; | |
1173 | case Opt_sec_ntlmv2i: | |
1174 | vol->secFlg |= CIFSSEC_MAY_NTLMV2 | CIFSSEC_MUST_SIGN; | |
1175 | break; | |
1176 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
1177 | case Opt_sec_lanman: | |
1178 | vol->secFlg |= CIFSSEC_MAY_LANMAN; | |
1179 | break; | |
1180 | #endif | |
1181 | case Opt_sec_none: | |
1182 | vol->nullauth = 1; | |
1183 | break; | |
1184 | default: | |
1185 | cERROR(1, "bad security option: %s", value); | |
1186 | return 1; | |
1187 | } | |
1188 | ||
1189 | return 0; | |
1190 | } | |
1191 | ||
15b6a473 JL |
1192 | static int |
1193 | cifs_parse_cache_flavor(char *value, struct smb_vol *vol) | |
1194 | { | |
1195 | substring_t args[MAX_OPT_ARGS]; | |
1196 | ||
1197 | switch (match_token(value, cifs_cacheflavor_tokens, args)) { | |
1198 | case Opt_cache_loose: | |
1199 | vol->direct_io = false; | |
1200 | vol->strict_io = false; | |
1201 | break; | |
1202 | case Opt_cache_strict: | |
1203 | vol->direct_io = false; | |
1204 | vol->strict_io = true; | |
1205 | break; | |
1206 | case Opt_cache_none: | |
1207 | vol->direct_io = true; | |
1208 | vol->strict_io = false; | |
1209 | break; | |
1210 | default: | |
1211 | cERROR(1, "bad cache= option: %s", value); | |
1212 | return 1; | |
1213 | } | |
1214 | return 0; | |
1215 | } | |
1216 | ||
23db65f5 JL |
1217 | static int |
1218 | cifs_parse_smb_version(char *value, struct smb_vol *vol) | |
1219 | { | |
1220 | substring_t args[MAX_OPT_ARGS]; | |
1221 | ||
1222 | switch (match_token(value, cifs_smb_version_tokens, args)) { | |
1223 | case Smb_1: | |
1224 | vol->ops = &smb1_operations; | |
1225 | vol->vals = &smb1_values; | |
1226 | break; | |
1080ef75 SF |
1227 | #ifdef CONFIG_CIFS_SMB2 |
1228 | case Smb_21: | |
1229 | vol->ops = &smb21_operations; | |
1230 | vol->vals = &smb21_values; | |
1231 | break; | |
1232 | #endif | |
23db65f5 JL |
1233 | default: |
1234 | cERROR(1, "Unknown vers= option specified: %s", value); | |
1235 | return 1; | |
1236 | } | |
1237 | return 0; | |
1238 | } | |
1239 | ||
1da177e4 | 1240 | static int |
b946845a | 1241 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
50c2f753 | 1242 | struct smb_vol *vol) |
1da177e4 | 1243 | { |
8830d7e0 | 1244 | char *data, *end; |
957df453 | 1245 | char *mountdata_copy = NULL, *options; |
1da177e4 LT |
1246 | unsigned int temp_len, i, j; |
1247 | char separator[2]; | |
9b9d6b24 JL |
1248 | short int override_uid = -1; |
1249 | short int override_gid = -1; | |
1250 | bool uid_specified = false; | |
1251 | bool gid_specified = false; | |
d8162558 JL |
1252 | bool sloppy = false; |
1253 | char *invalid = NULL; | |
88463999 | 1254 | char *nodename = utsname()->nodename; |
8830d7e0 SP |
1255 | char *string = NULL; |
1256 | char *tmp_end, *value; | |
1257 | char delim; | |
296838b1 JL |
1258 | bool cache_specified = false; |
1259 | static bool cache_warned = false; | |
1da177e4 LT |
1260 | |
1261 | separator[0] = ','; | |
50c2f753 | 1262 | separator[1] = 0; |
8830d7e0 | 1263 | delim = separator[0]; |
1da177e4 | 1264 | |
88463999 JL |
1265 | /* |
1266 | * does not have to be perfect mapping since field is | |
1267 | * informational, only used for servers that do not support | |
1268 | * port 445 and it can be overridden at mount time | |
1269 | */ | |
1397f2ee JL |
1270 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
1271 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
1272 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
1273 | ||
1397f2ee | 1274 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
1275 | /* null target name indicates to use *SMBSERVR default called name |
1276 | if we end up sending RFC1001 session initialize */ | |
1277 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
1278 | vol->cred_uid = current_uid(); |
1279 | vol->linux_uid = current_uid(); | |
a001e5b5 | 1280 | vol->linux_gid = current_gid(); |
f55ed1a8 JL |
1281 | |
1282 | /* default to only allowing write access to owner of the mount */ | |
1283 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
1284 | |
1285 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
1286 | /* default is always to request posix paths. */ |
1287 | vol->posix_paths = 1; | |
a0c9217f JL |
1288 | /* default to using server inode numbers where available */ |
1289 | vol->server_ino = 1; | |
ac67055e | 1290 | |
6d20e840 SJ |
1291 | vol->actimeo = CIFS_DEF_ACTIMEO; |
1292 | ||
23db65f5 JL |
1293 | /* FIXME: add autonegotiation -- for now, SMB1 is default */ |
1294 | vol->ops = &smb1_operations; | |
1295 | vol->vals = &smb1_values; | |
1296 | ||
b946845a SF |
1297 | if (!mountdata) |
1298 | goto cifs_parse_mount_err; | |
1299 | ||
1300 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); | |
1301 | if (!mountdata_copy) | |
1302 | goto cifs_parse_mount_err; | |
1da177e4 | 1303 | |
b946845a | 1304 | options = mountdata_copy; |
4906e50b | 1305 | end = options + strlen(options); |
8830d7e0 | 1306 | |
50c2f753 | 1307 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 1308 | if (options[4] != 0) { |
1da177e4 LT |
1309 | separator[0] = options[4]; |
1310 | options += 5; | |
1311 | } else { | |
b6b38f70 | 1312 | cFYI(1, "Null separator not allowed"); |
1da177e4 LT |
1313 | } |
1314 | } | |
3d3ea8e6 SP |
1315 | vol->backupuid_specified = false; /* no backup intent for a user */ |
1316 | vol->backupgid_specified = false; /* no backup intent for a group */ | |
50c2f753 | 1317 | |
1da177e4 | 1318 | while ((data = strsep(&options, separator)) != NULL) { |
8830d7e0 SP |
1319 | substring_t args[MAX_OPT_ARGS]; |
1320 | unsigned long option; | |
1321 | int token; | |
1322 | ||
1da177e4 LT |
1323 | if (!*data) |
1324 | continue; | |
1da177e4 | 1325 | |
8830d7e0 SP |
1326 | token = match_token(data, cifs_mount_option_tokens, args); |
1327 | ||
1328 | switch (token) { | |
1329 | ||
1330 | /* Ingnore the following */ | |
1331 | case Opt_ignore: | |
1332 | break; | |
1333 | ||
1334 | /* Boolean values */ | |
1335 | case Opt_user_xattr: | |
1da177e4 | 1336 | vol->no_xattr = 0; |
8830d7e0 SP |
1337 | break; |
1338 | case Opt_nouser_xattr: | |
1da177e4 | 1339 | vol->no_xattr = 1; |
8830d7e0 SP |
1340 | break; |
1341 | case Opt_forceuid: | |
9b9d6b24 | 1342 | override_uid = 1; |
8830d7e0 SP |
1343 | break; |
1344 | case Opt_noforceuid: | |
9b9d6b24 | 1345 | override_uid = 0; |
8830d7e0 SP |
1346 | break; |
1347 | case Opt_noblocksend: | |
edf1ae40 | 1348 | vol->noblocksnd = 1; |
8830d7e0 SP |
1349 | break; |
1350 | case Opt_noautotune: | |
edf1ae40 | 1351 | vol->noautotune = 1; |
8830d7e0 SP |
1352 | break; |
1353 | case Opt_hard: | |
1da177e4 | 1354 | vol->retry = 1; |
8830d7e0 SP |
1355 | break; |
1356 | case Opt_soft: | |
1da177e4 | 1357 | vol->retry = 0; |
8830d7e0 SP |
1358 | break; |
1359 | case Opt_perm: | |
1da177e4 | 1360 | vol->noperm = 0; |
8830d7e0 SP |
1361 | break; |
1362 | case Opt_noperm: | |
1da177e4 | 1363 | vol->noperm = 1; |
8830d7e0 SP |
1364 | break; |
1365 | case Opt_mapchars: | |
6a0b4824 | 1366 | vol->remap = 1; |
8830d7e0 SP |
1367 | break; |
1368 | case Opt_nomapchars: | |
6a0b4824 | 1369 | vol->remap = 0; |
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 SP |
1414 | break; |
1415 | case Opt_dynperm: | |
d0a9c078 | 1416 | vol->dynperm = true; |
8830d7e0 SP |
1417 | break; |
1418 | case Opt_nodynperm: | |
d0a9c078 | 1419 | vol->dynperm = false; |
8830d7e0 SP |
1420 | break; |
1421 | case Opt_nohard: | |
1da177e4 | 1422 | vol->retry = 0; |
8830d7e0 SP |
1423 | break; |
1424 | case Opt_nosoft: | |
1da177e4 | 1425 | vol->retry = 1; |
8830d7e0 SP |
1426 | break; |
1427 | case Opt_nointr: | |
1da177e4 | 1428 | vol->intr = 0; |
8830d7e0 SP |
1429 | break; |
1430 | case Opt_intr: | |
1da177e4 | 1431 | vol->intr = 1; |
8830d7e0 SP |
1432 | break; |
1433 | case Opt_nostrictsync: | |
be652445 | 1434 | vol->nostrictsync = 1; |
8830d7e0 SP |
1435 | break; |
1436 | case Opt_strictsync: | |
be652445 | 1437 | vol->nostrictsync = 0; |
8830d7e0 SP |
1438 | break; |
1439 | case Opt_serverino: | |
1da177e4 | 1440 | vol->server_ino = 1; |
8830d7e0 SP |
1441 | break; |
1442 | case Opt_noserverino: | |
1da177e4 | 1443 | vol->server_ino = 0; |
8830d7e0 SP |
1444 | break; |
1445 | case Opt_rwpidforward: | |
d4ffff1f | 1446 | vol->rwpidforward = 1; |
8830d7e0 SP |
1447 | break; |
1448 | case Opt_cifsacl: | |
0a4b92c0 | 1449 | vol->cifs_acl = 1; |
8830d7e0 SP |
1450 | break; |
1451 | case Opt_nocifsacl: | |
0a4b92c0 | 1452 | vol->cifs_acl = 0; |
8830d7e0 SP |
1453 | break; |
1454 | case Opt_acl: | |
1da177e4 | 1455 | vol->no_psx_acl = 0; |
8830d7e0 SP |
1456 | break; |
1457 | case Opt_noacl: | |
1da177e4 | 1458 | vol->no_psx_acl = 1; |
8830d7e0 SP |
1459 | break; |
1460 | case Opt_locallease: | |
84210e91 | 1461 | vol->local_lease = 1; |
8830d7e0 SP |
1462 | break; |
1463 | case Opt_sign: | |
750d1151 | 1464 | vol->secFlg |= CIFSSEC_MUST_SIGN; |
8830d7e0 SP |
1465 | break; |
1466 | case Opt_seal: | |
95b1cb90 | 1467 | /* we do not do the following in secFlags because seal |
8830d7e0 SP |
1468 | * is a per tree connection (mount) not a per socket |
1469 | * or per-smb connection option in the protocol | |
1470 | * vol->secFlg |= CIFSSEC_MUST_SEAL; | |
1471 | */ | |
95b1cb90 | 1472 | vol->seal = 1; |
8830d7e0 SP |
1473 | break; |
1474 | case Opt_direct: | |
296838b1 | 1475 | cache_specified = true; |
15b6a473 JL |
1476 | vol->direct_io = true; |
1477 | vol->strict_io = false; | |
09983b2f JL |
1478 | cERROR(1, "The \"directio\" option will be removed in " |
1479 | "3.7. Please switch to the \"cache=none\" " | |
1480 | "option."); | |
8830d7e0 SP |
1481 | break; |
1482 | case Opt_strictcache: | |
296838b1 | 1483 | cache_specified = true; |
15b6a473 JL |
1484 | vol->direct_io = false; |
1485 | vol->strict_io = true; | |
09983b2f JL |
1486 | cERROR(1, "The \"strictcache\" option will be removed " |
1487 | "in 3.7. Please switch to the \"cache=strict\" " | |
1488 | "option."); | |
8830d7e0 SP |
1489 | break; |
1490 | case Opt_noac: | |
50c2f753 SF |
1491 | printk(KERN_WARNING "CIFS: Mount option noac not " |
1492 | "supported. Instead set " | |
1493 | "/proc/fs/cifs/LookupCacheEnabled to 0\n"); | |
8830d7e0 SP |
1494 | break; |
1495 | case Opt_fsc: | |
607a569d | 1496 | #ifndef CONFIG_CIFS_FSCACHE |
83fb086e | 1497 | cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE " |
607a569d | 1498 | "kernel config option set"); |
b946845a | 1499 | goto cifs_parse_mount_err; |
607a569d | 1500 | #endif |
fa1df75d | 1501 | vol->fsc = true; |
8830d7e0 SP |
1502 | break; |
1503 | case Opt_mfsymlinks: | |
736a3320 | 1504 | vol->mfsymlinks = true; |
8830d7e0 SP |
1505 | break; |
1506 | case Opt_multiuser: | |
0eb8a132 | 1507 | vol->multiuser = true; |
8830d7e0 | 1508 | break; |
d8162558 JL |
1509 | case Opt_sloppy: |
1510 | sloppy = true; | |
1511 | break; | |
8830d7e0 SP |
1512 | |
1513 | /* Numeric Values */ | |
1514 | case Opt_backupuid: | |
1515 | if (get_option_ul(args, &option)) { | |
3d3ea8e6 SP |
1516 | cERROR(1, "%s: Invalid backupuid value", |
1517 | __func__); | |
1518 | goto cifs_parse_mount_err; | |
1519 | } | |
8830d7e0 | 1520 | vol->backupuid = option; |
3d3ea8e6 | 1521 | vol->backupuid_specified = true; |
8830d7e0 SP |
1522 | break; |
1523 | case Opt_backupgid: | |
1524 | if (get_option_ul(args, &option)) { | |
3d3ea8e6 SP |
1525 | cERROR(1, "%s: Invalid backupgid value", |
1526 | __func__); | |
1527 | goto cifs_parse_mount_err; | |
1528 | } | |
8830d7e0 | 1529 | vol->backupgid = option; |
3d3ea8e6 | 1530 | vol->backupgid_specified = true; |
8830d7e0 SP |
1531 | break; |
1532 | case Opt_uid: | |
1533 | if (get_option_ul(args, &option)) { | |
1534 | cERROR(1, "%s: Invalid uid value", | |
1535 | __func__); | |
1536 | goto cifs_parse_mount_err; | |
1537 | } | |
1538 | vol->linux_uid = option; | |
1539 | uid_specified = true; | |
1540 | break; | |
1541 | case Opt_cruid: | |
1542 | if (get_option_ul(args, &option)) { | |
1543 | cERROR(1, "%s: Invalid cruid value", | |
1544 | __func__); | |
1545 | goto cifs_parse_mount_err; | |
1546 | } | |
1547 | vol->cred_uid = option; | |
1548 | break; | |
1549 | case Opt_gid: | |
1550 | if (get_option_ul(args, &option)) { | |
1551 | cERROR(1, "%s: Invalid gid value", | |
1552 | __func__); | |
1553 | goto cifs_parse_mount_err; | |
1554 | } | |
1555 | vol->linux_gid = option; | |
1556 | gid_specified = true; | |
1557 | break; | |
1558 | case Opt_file_mode: | |
1559 | if (get_option_ul(args, &option)) { | |
1560 | cERROR(1, "%s: Invalid file_mode value", | |
1561 | __func__); | |
1562 | goto cifs_parse_mount_err; | |
1563 | } | |
1564 | vol->file_mode = option; | |
1565 | break; | |
1566 | case Opt_dirmode: | |
1567 | if (get_option_ul(args, &option)) { | |
1568 | cERROR(1, "%s: Invalid dir_mode value", | |
1569 | __func__); | |
1570 | goto cifs_parse_mount_err; | |
1571 | } | |
1572 | vol->dir_mode = option; | |
1573 | break; | |
1574 | case Opt_port: | |
1575 | if (get_option_ul(args, &option)) { | |
1576 | cERROR(1, "%s: Invalid port value", | |
1577 | __func__); | |
1578 | goto cifs_parse_mount_err; | |
1579 | } | |
1580 | vol->port = option; | |
1581 | break; | |
1582 | case Opt_rsize: | |
1583 | if (get_option_ul(args, &option)) { | |
1584 | cERROR(1, "%s: Invalid rsize value", | |
1585 | __func__); | |
b946845a | 1586 | goto cifs_parse_mount_err; |
8830d7e0 SP |
1587 | } |
1588 | vol->rsize = option; | |
1589 | break; | |
1590 | case Opt_wsize: | |
1591 | if (get_option_ul(args, &option)) { | |
1592 | cERROR(1, "%s: Invalid wsize value", | |
1593 | __func__); | |
1594 | goto cifs_parse_mount_err; | |
1595 | } | |
1596 | vol->wsize = option; | |
1597 | break; | |
1598 | case Opt_actimeo: | |
1599 | if (get_option_ul(args, &option)) { | |
1600 | cERROR(1, "%s: Invalid actimeo value", | |
1601 | __func__); | |
1602 | goto cifs_parse_mount_err; | |
1603 | } | |
1604 | vol->actimeo = HZ * option; | |
1605 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
1606 | cERROR(1, "CIFS: attribute cache" | |
1607 | "timeout too large"); | |
1608 | goto cifs_parse_mount_err; | |
1609 | } | |
1610 | break; | |
1611 | ||
1612 | /* String Arguments */ | |
1613 | ||
4fe9e963 SP |
1614 | case Opt_blank_user: |
1615 | /* null user, ie. anonymous authentication */ | |
1616 | vol->nullauth = 1; | |
1617 | vol->username = NULL; | |
1618 | break; | |
8830d7e0 SP |
1619 | case Opt_user: |
1620 | string = match_strdup(args); | |
1621 | if (string == NULL) | |
1622 | goto out_nomem; | |
1623 | ||
4fe9e963 | 1624 | if (strnlen(string, MAX_USERNAME_SIZE) > |
8830d7e0 SP |
1625 | MAX_USERNAME_SIZE) { |
1626 | printk(KERN_WARNING "CIFS: username too long\n"); | |
1627 | goto cifs_parse_mount_err; | |
1628 | } | |
1629 | vol->username = kstrdup(string, GFP_KERNEL); | |
1630 | if (!vol->username) { | |
1631 | printk(KERN_WARNING "CIFS: no memory " | |
1632 | "for username\n"); | |
1633 | goto cifs_parse_mount_err; | |
1634 | } | |
1635 | break; | |
1636 | case Opt_blank_pass: | |
1637 | vol->password = NULL; | |
1638 | break; | |
1639 | case Opt_pass: | |
1640 | /* passwords have to be handled differently | |
1641 | * to allow the character used for deliminator | |
1642 | * to be passed within them | |
1643 | */ | |
1644 | ||
1645 | /* Obtain the value string */ | |
1646 | value = strchr(data, '='); | |
10238074 | 1647 | value++; |
8830d7e0 SP |
1648 | |
1649 | /* Set tmp_end to end of the string */ | |
1650 | tmp_end = (char *) value + strlen(value); | |
1651 | ||
1652 | /* Check if following character is the deliminator | |
1653 | * If yes, we have encountered a double deliminator | |
1654 | * reset the NULL character to the deliminator | |
1655 | */ | |
e73f843a | 1656 | if (tmp_end < end && tmp_end[1] == delim) { |
8830d7e0 SP |
1657 | tmp_end[0] = delim; |
1658 | ||
e73f843a SJ |
1659 | /* Keep iterating until we get to a single |
1660 | * deliminator OR the end | |
1661 | */ | |
1662 | while ((tmp_end = strchr(tmp_end, delim)) | |
1663 | != NULL && (tmp_end[1] == delim)) { | |
1664 | tmp_end = (char *) &tmp_end[2]; | |
1665 | } | |
1666 | ||
1667 | /* Reset var options to point to next element */ | |
1668 | if (tmp_end) { | |
1669 | tmp_end[0] = '\0'; | |
1670 | options = (char *) &tmp_end[1]; | |
1671 | } else | |
1672 | /* Reached the end of the mount option | |
1673 | * string */ | |
1674 | options = end; | |
8830d7e0 SP |
1675 | } |
1676 | ||
8830d7e0 SP |
1677 | /* Now build new password string */ |
1678 | temp_len = strlen(value); | |
1679 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); | |
1680 | if (vol->password == NULL) { | |
1681 | printk(KERN_WARNING "CIFS: no memory " | |
1682 | "for password\n"); | |
1683 | goto cifs_parse_mount_err; | |
1684 | } | |
1685 | ||
1686 | for (i = 0, j = 0; i < temp_len; i++, j++) { | |
1687 | vol->password[j] = value[i]; | |
1688 | if ((value[i] == delim) && | |
1689 | value[i+1] == delim) | |
1690 | /* skip the second deliminator */ | |
1691 | i++; | |
1692 | } | |
1693 | vol->password[j] = '\0'; | |
1694 | break; | |
4fe9e963 SP |
1695 | case Opt_blank_ip: |
1696 | vol->UNCip = NULL; | |
1697 | break; | |
8830d7e0 SP |
1698 | case Opt_ip: |
1699 | string = match_strdup(args); | |
1700 | if (string == NULL) | |
1701 | goto out_nomem; | |
1702 | ||
4fe9e963 | 1703 | if (strnlen(string, INET6_ADDRSTRLEN) > |
8830d7e0 SP |
1704 | INET6_ADDRSTRLEN) { |
1705 | printk(KERN_WARNING "CIFS: ip address " | |
1706 | "too long\n"); | |
1707 | goto cifs_parse_mount_err; | |
1708 | } | |
1709 | vol->UNCip = kstrdup(string, GFP_KERNEL); | |
1710 | if (!vol->UNCip) { | |
1711 | printk(KERN_WARNING "CIFS: no memory " | |
1712 | "for UNC IP\n"); | |
1713 | goto cifs_parse_mount_err; | |
1714 | } | |
1715 | break; | |
1716 | case Opt_unc: | |
1717 | string = match_strdup(args); | |
1718 | if (string == NULL) | |
1719 | goto out_nomem; | |
1720 | ||
8830d7e0 SP |
1721 | temp_len = strnlen(string, 300); |
1722 | if (temp_len == 300) { | |
1723 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
1724 | goto cifs_parse_mount_err; | |
1725 | } | |
1726 | ||
e4b41fb9 SP |
1727 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
1728 | if (vol->UNC == NULL) { | |
1729 | printk(KERN_WARNING "CIFS: no memory for UNC\n"); | |
1730 | goto cifs_parse_mount_err; | |
1731 | } | |
1732 | strcpy(vol->UNC, string); | |
1733 | ||
8830d7e0 | 1734 | if (strncmp(string, "//", 2) == 0) { |
1da177e4 LT |
1735 | vol->UNC[0] = '\\'; |
1736 | vol->UNC[1] = '\\'; | |
8830d7e0 | 1737 | } else if (strncmp(string, "\\\\", 2) != 0) { |
50c2f753 | 1738 | printk(KERN_WARNING "CIFS: UNC Path does not " |
8830d7e0 | 1739 | "begin with // or \\\\\n"); |
b946845a | 1740 | goto cifs_parse_mount_err; |
1da177e4 | 1741 | } |
8830d7e0 | 1742 | |
8830d7e0 SP |
1743 | break; |
1744 | case Opt_domain: | |
1745 | string = match_strdup(args); | |
1746 | if (string == NULL) | |
1747 | goto out_nomem; | |
1748 | ||
4fe9e963 | 1749 | if (strnlen(string, 256) == 256) { |
8830d7e0 SP |
1750 | printk(KERN_WARNING "CIFS: domain name too" |
1751 | " long\n"); | |
1752 | goto cifs_parse_mount_err; | |
1753 | } | |
1754 | ||
1755 | vol->domainname = kstrdup(string, GFP_KERNEL); | |
1756 | if (!vol->domainname) { | |
1757 | printk(KERN_WARNING "CIFS: no memory " | |
1758 | "for domainname\n"); | |
1759 | goto cifs_parse_mount_err; | |
1760 | } | |
1761 | cFYI(1, "Domain name set"); | |
1762 | break; | |
1763 | case Opt_srcaddr: | |
1764 | string = match_strdup(args); | |
1765 | if (string == NULL) | |
1766 | goto out_nomem; | |
1767 | ||
4fe9e963 | 1768 | if (!cifs_convert_address( |
8830d7e0 SP |
1769 | (struct sockaddr *)&vol->srcaddr, |
1770 | string, strlen(string))) { | |
1771 | printk(KERN_WARNING "CIFS: Could not parse" | |
1772 | " srcaddr: %s\n", string); | |
1773 | goto cifs_parse_mount_err; | |
1774 | } | |
1775 | break; | |
1776 | case Opt_prefixpath: | |
1777 | string = match_strdup(args); | |
1778 | if (string == NULL) | |
1779 | goto out_nomem; | |
1780 | ||
8830d7e0 SP |
1781 | temp_len = strnlen(string, 1024); |
1782 | if (string[0] != '/') | |
1783 | temp_len++; /* missing leading slash */ | |
1784 | if (temp_len > 1024) { | |
1785 | printk(KERN_WARNING "CIFS: prefix too long\n"); | |
1786 | goto cifs_parse_mount_err; | |
1787 | } | |
1788 | ||
1789 | vol->prepath = kmalloc(temp_len+1, GFP_KERNEL); | |
1790 | if (vol->prepath == NULL) { | |
1791 | printk(KERN_WARNING "CIFS: no memory " | |
1792 | "for path prefix\n"); | |
1793 | goto cifs_parse_mount_err; | |
1794 | } | |
1795 | ||
1796 | if (string[0] != '/') { | |
1797 | vol->prepath[0] = '/'; | |
1798 | strcpy(vol->prepath+1, string); | |
1799 | } else | |
1800 | strcpy(vol->prepath, string); | |
1801 | ||
1802 | break; | |
1803 | case Opt_iocharset: | |
1804 | string = match_strdup(args); | |
1805 | if (string == NULL) | |
1806 | goto out_nomem; | |
1807 | ||
4fe9e963 | 1808 | if (strnlen(string, 1024) >= 65) { |
8830d7e0 SP |
1809 | printk(KERN_WARNING "CIFS: iocharset name " |
1810 | "too long.\n"); | |
1811 | goto cifs_parse_mount_err; | |
1812 | } | |
1813 | ||
1814 | if (strnicmp(string, "default", 7) != 0) { | |
1815 | vol->iocharset = kstrdup(string, | |
1816 | GFP_KERNEL); | |
1817 | if (!vol->iocharset) { | |
1818 | printk(KERN_WARNING "CIFS: no memory" | |
1819 | "for charset\n"); | |
1820 | goto cifs_parse_mount_err; | |
1821 | } | |
1822 | } | |
1823 | /* if iocharset not set then load_nls_default | |
1824 | * is used by caller | |
1825 | */ | |
1826 | cFYI(1, "iocharset set to %s", string); | |
1827 | break; | |
1828 | case Opt_sockopt: | |
1829 | string = match_strdup(args); | |
1830 | if (string == NULL) | |
1831 | goto out_nomem; | |
1832 | ||
8830d7e0 SP |
1833 | if (strnicmp(string, "TCP_NODELAY", 11) == 0) |
1834 | vol->sockopt_tcp_nodelay = 1; | |
1835 | break; | |
1836 | case Opt_netbiosname: | |
1837 | string = match_strdup(args); | |
1838 | if (string == NULL) | |
1839 | goto out_nomem; | |
1840 | ||
8830d7e0 SP |
1841 | memset(vol->source_rfc1001_name, 0x20, |
1842 | RFC1001_NAME_LEN); | |
1843 | /* | |
1844 | * FIXME: are there cases in which a comma can | |
1845 | * be valid in workstation netbios name (and | |
1846 | * need special handling)? | |
1847 | */ | |
1848 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
1849 | /* don't ucase netbiosname for user */ | |
1850 | if (string[i] == 0) | |
1851 | break; | |
1852 | vol->source_rfc1001_name[i] = string[i]; | |
1853 | } | |
1854 | /* The string has 16th byte zero still from | |
1855 | * set at top of the function | |
1856 | */ | |
1857 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
1858 | printk(KERN_WARNING "CIFS: netbiosname" | |
1859 | " longer than 15 truncated.\n"); | |
1860 | ||
1861 | break; | |
1862 | case Opt_servern: | |
1863 | /* servernetbiosname specified override *SMBSERVER */ | |
1864 | string = match_strdup(args); | |
1865 | if (string == NULL) | |
1866 | goto out_nomem; | |
1867 | ||
8830d7e0 SP |
1868 | /* last byte, type, is 0x20 for servr type */ |
1869 | memset(vol->target_rfc1001_name, 0x20, | |
1870 | RFC1001_NAME_LEN_WITH_NULL); | |
1871 | ||
1872 | /* BB are there cases in which a comma can be | |
1873 | valid in this workstation netbios name | |
1874 | (and need special handling)? */ | |
1875 | ||
1876 | /* user or mount helper must uppercase the | |
1877 | netbios name */ | |
1878 | for (i = 0; i < 15; i++) { | |
1879 | if (string[i] == 0) | |
1880 | break; | |
1881 | vol->target_rfc1001_name[i] = string[i]; | |
1882 | } | |
1883 | /* The string has 16th byte zero still from | |
1884 | set at top of the function */ | |
1885 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
1886 | printk(KERN_WARNING "CIFS: server net" | |
1887 | "biosname longer than 15 truncated.\n"); | |
1888 | break; | |
1889 | case Opt_ver: | |
1890 | string = match_strdup(args); | |
1891 | if (string == NULL) | |
1892 | goto out_nomem; | |
1893 | ||
5249af32 | 1894 | if (strnicmp(string, "1", 1) == 0) { |
8830d7e0 SP |
1895 | /* This is the default */ |
1896 | break; | |
1897 | } | |
1898 | /* For all other value, error */ | |
1899 | printk(KERN_WARNING "CIFS: Invalid version" | |
1900 | " specified\n"); | |
b946845a | 1901 | goto cifs_parse_mount_err; |
23db65f5 JL |
1902 | case Opt_vers: |
1903 | string = match_strdup(args); | |
1904 | if (string == NULL) | |
1905 | goto out_nomem; | |
1906 | ||
1907 | if (cifs_parse_smb_version(string, vol) != 0) | |
1908 | goto cifs_parse_mount_err; | |
1909 | break; | |
8830d7e0 SP |
1910 | case Opt_sec: |
1911 | string = match_strdup(args); | |
1912 | if (string == NULL) | |
1913 | goto out_nomem; | |
1914 | ||
8830d7e0 SP |
1915 | if (cifs_parse_security_flavors(string, vol) != 0) |
1916 | goto cifs_parse_mount_err; | |
1917 | break; | |
15b6a473 | 1918 | case Opt_cache: |
296838b1 | 1919 | cache_specified = true; |
15b6a473 JL |
1920 | string = match_strdup(args); |
1921 | if (string == NULL) | |
1922 | goto out_nomem; | |
1923 | ||
1924 | if (cifs_parse_cache_flavor(string, vol) != 0) | |
1925 | goto cifs_parse_mount_err; | |
1926 | break; | |
8830d7e0 | 1927 | default: |
d8162558 JL |
1928 | /* |
1929 | * An option we don't recognize. Save it off for later | |
1930 | * if we haven't already found one | |
1931 | */ | |
1932 | if (!invalid) | |
1933 | invalid = data; | |
8830d7e0 | 1934 | break; |
1da177e4 | 1935 | } |
8830d7e0 SP |
1936 | /* Free up any allocated string */ |
1937 | kfree(string); | |
1938 | string = NULL; | |
1da177e4 | 1939 | } |
0eb8a132 | 1940 | |
d8162558 JL |
1941 | if (!sloppy && invalid) { |
1942 | printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid); | |
1943 | goto cifs_parse_mount_err; | |
1944 | } | |
1945 | ||
8a8798a5 JL |
1946 | #ifndef CONFIG_KEYS |
1947 | /* Muliuser mounts require CONFIG_KEYS support */ | |
1948 | if (vol->multiuser) { | |
1949 | cERROR(1, "Multiuser mounts require kernels with " | |
1950 | "CONFIG_KEYS enabled."); | |
b946845a | 1951 | goto cifs_parse_mount_err; |
0eb8a132 | 1952 | } |
8a8798a5 | 1953 | #endif |
0eb8a132 | 1954 | |
fb8c4b14 | 1955 | if (vol->UNCip == NULL) |
1da177e4 LT |
1956 | vol->UNCip = &vol->UNC[2]; |
1957 | ||
9b9d6b24 JL |
1958 | if (uid_specified) |
1959 | vol->override_uid = override_uid; | |
1960 | else if (override_uid == 1) | |
1961 | printk(KERN_NOTICE "CIFS: ignoring forceuid mount option " | |
1962 | "specified with no uid= option.\n"); | |
1963 | ||
1964 | if (gid_specified) | |
1965 | vol->override_gid = override_gid; | |
1966 | else if (override_gid == 1) | |
1967 | printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " | |
1968 | "specified with no gid= option.\n"); | |
1969 | ||
296838b1 JL |
1970 | /* FIXME: remove this block in 3.7 */ |
1971 | if (!cache_specified && !cache_warned) { | |
1972 | cache_warned = true; | |
1973 | printk(KERN_NOTICE "CIFS: no cache= option specified, using " | |
1974 | "\"cache=loose\". This default will change " | |
1975 | "to \"cache=strict\" in 3.7.\n"); | |
1976 | } | |
1977 | ||
b946845a | 1978 | kfree(mountdata_copy); |
1da177e4 | 1979 | return 0; |
b946845a | 1980 | |
8830d7e0 SP |
1981 | out_nomem: |
1982 | printk(KERN_WARNING "Could not allocate temporary buffer\n"); | |
b946845a | 1983 | cifs_parse_mount_err: |
8830d7e0 | 1984 | kfree(string); |
b946845a SF |
1985 | kfree(mountdata_copy); |
1986 | return 1; | |
1da177e4 LT |
1987 | } |
1988 | ||
3eb9a889 BG |
1989 | /** Returns true if srcaddr isn't specified and rhs isn't |
1990 | * specified, or if srcaddr is specified and | |
1991 | * matches the IP address of the rhs argument. | |
1992 | */ | |
1993 | static bool | |
1994 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
1995 | { | |
1996 | switch (srcaddr->sa_family) { | |
1997 | case AF_UNSPEC: | |
1998 | return (rhs->sa_family == AF_UNSPEC); | |
1999 | case AF_INET: { | |
2000 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
2001 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
2002 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
2003 | } | |
2004 | case AF_INET6: { | |
2005 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
2006 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs; | |
2007 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); | |
2008 | } | |
2009 | default: | |
2010 | WARN_ON(1); | |
2011 | return false; /* don't expect to be here */ | |
2012 | } | |
2013 | } | |
2014 | ||
4b886136 PS |
2015 | /* |
2016 | * If no port is specified in addr structure, we try to match with 445 port | |
2017 | * and if it fails - with 139 ports. It should be called only if address | |
2018 | * families of server and addr are equal. | |
2019 | */ | |
2020 | static bool | |
2021 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
2022 | { | |
6da97910 | 2023 | __be16 port, *sport; |
4b886136 PS |
2024 | |
2025 | switch (addr->sa_family) { | |
2026 | case AF_INET: | |
2027 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
2028 | port = ((struct sockaddr_in *) addr)->sin_port; | |
2029 | break; | |
2030 | case AF_INET6: | |
2031 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
2032 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
2033 | break; | |
2034 | default: | |
2035 | WARN_ON(1); | |
2036 | return false; | |
2037 | } | |
2038 | ||
2039 | if (!port) { | |
2040 | port = htons(CIFS_PORT); | |
2041 | if (port == *sport) | |
2042 | return true; | |
2043 | ||
2044 | port = htons(RFC1001_PORT); | |
2045 | } | |
2046 | ||
2047 | return port == *sport; | |
2048 | } | |
3eb9a889 | 2049 | |
4515148e | 2050 | static bool |
3eb9a889 BG |
2051 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
2052 | struct sockaddr *srcaddr) | |
4515148e | 2053 | { |
4515148e | 2054 | switch (addr->sa_family) { |
a9f1b85e PS |
2055 | case AF_INET: { |
2056 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
2057 | struct sockaddr_in *srv_addr4 = | |
2058 | (struct sockaddr_in *)&server->dstaddr; | |
2059 | ||
2060 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 2061 | return false; |
4515148e | 2062 | break; |
a9f1b85e PS |
2063 | } |
2064 | case AF_INET6: { | |
2065 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
2066 | struct sockaddr_in6 *srv_addr6 = | |
2067 | (struct sockaddr_in6 *)&server->dstaddr; | |
2068 | ||
4515148e | 2069 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 2070 | &srv_addr6->sin6_addr)) |
4515148e | 2071 | return false; |
a9f1b85e | 2072 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 2073 | return false; |
4515148e JL |
2074 | break; |
2075 | } | |
a9f1b85e PS |
2076 | default: |
2077 | WARN_ON(1); | |
2078 | return false; /* don't expect to be here */ | |
2079 | } | |
4515148e | 2080 | |
3eb9a889 BG |
2081 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
2082 | return false; | |
2083 | ||
4515148e JL |
2084 | return true; |
2085 | } | |
2086 | ||
daf5b0b6 JL |
2087 | static bool |
2088 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
2089 | { | |
2090 | unsigned int secFlags; | |
2091 | ||
2092 | if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
2093 | secFlags = vol->secFlg; | |
2094 | else | |
2095 | secFlags = global_secflags | vol->secFlg; | |
2096 | ||
2097 | switch (server->secType) { | |
2098 | case LANMAN: | |
2099 | if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT))) | |
2100 | return false; | |
2101 | break; | |
2102 | case NTLMv2: | |
2103 | if (!(secFlags & CIFSSEC_MAY_NTLMV2)) | |
2104 | return false; | |
2105 | break; | |
2106 | case NTLM: | |
2107 | if (!(secFlags & CIFSSEC_MAY_NTLM)) | |
2108 | return false; | |
2109 | break; | |
2110 | case Kerberos: | |
2111 | if (!(secFlags & CIFSSEC_MAY_KRB5)) | |
2112 | return false; | |
2113 | break; | |
2114 | case RawNTLMSSP: | |
2115 | if (!(secFlags & CIFSSEC_MAY_NTLMSSP)) | |
2116 | return false; | |
2117 | break; | |
2118 | default: | |
2119 | /* shouldn't happen */ | |
2120 | return false; | |
2121 | } | |
2122 | ||
25985edc | 2123 | /* now check if signing mode is acceptable */ |
daf5b0b6 | 2124 | if ((secFlags & CIFSSEC_MAY_SIGN) == 0 && |
96daf2b0 | 2125 | (server->sec_mode & SECMODE_SIGN_REQUIRED)) |
daf5b0b6 JL |
2126 | return false; |
2127 | else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) && | |
96daf2b0 | 2128 | (server->sec_mode & |
daf5b0b6 JL |
2129 | (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0) |
2130 | return false; | |
2131 | ||
2132 | return true; | |
2133 | } | |
2134 | ||
37bb04e5 PS |
2135 | static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr, |
2136 | struct smb_vol *vol) | |
2137 | { | |
23db65f5 JL |
2138 | if ((server->vals != vol->vals) || (server->ops != vol->ops)) |
2139 | return 0; | |
2140 | ||
37bb04e5 PS |
2141 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) |
2142 | return 0; | |
2143 | ||
2144 | if (!match_address(server, addr, | |
2145 | (struct sockaddr *)&vol->srcaddr)) | |
2146 | return 0; | |
2147 | ||
2148 | if (!match_port(server, addr)) | |
2149 | return 0; | |
2150 | ||
2151 | if (!match_security(server, vol)) | |
2152 | return 0; | |
2153 | ||
2154 | return 1; | |
2155 | } | |
2156 | ||
e7ddee90 | 2157 | static struct TCP_Server_Info * |
daf5b0b6 | 2158 | cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol) |
1da177e4 | 2159 | { |
e7ddee90 | 2160 | struct TCP_Server_Info *server; |
e7ddee90 | 2161 | |
3f9bcca7 | 2162 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 2163 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
37bb04e5 | 2164 | if (!match_server(server, addr, vol)) |
daf5b0b6 JL |
2165 | continue; |
2166 | ||
e7ddee90 | 2167 | ++server->srv_count; |
3f9bcca7 | 2168 | spin_unlock(&cifs_tcp_ses_lock); |
b6b38f70 | 2169 | cFYI(1, "Existing tcp session with server found"); |
e7ddee90 | 2170 | return server; |
1da177e4 | 2171 | } |
3f9bcca7 | 2172 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2173 | return NULL; |
2174 | } | |
1b20d672 | 2175 | |
14fbf50d | 2176 | static void |
e7ddee90 | 2177 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
1da177e4 | 2178 | { |
e7ddee90 | 2179 | struct task_struct *task; |
1b20d672 | 2180 | |
3f9bcca7 | 2181 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 2182 | if (--server->srv_count > 0) { |
3f9bcca7 | 2183 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 2184 | return; |
1da177e4 | 2185 | } |
1b20d672 | 2186 | |
f1d0c998 RL |
2187 | put_net(cifs_net_ns(server)); |
2188 | ||
e7ddee90 | 2189 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 2190 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2191 | |
c74093b6 JL |
2192 | cancel_delayed_work_sync(&server->echo); |
2193 | ||
e7ddee90 JL |
2194 | spin_lock(&GlobalMid_Lock); |
2195 | server->tcpStatus = CifsExiting; | |
2196 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 2197 | |
d2b91521 | 2198 | cifs_crypto_shash_release(server); |
488f1d2d SJ |
2199 | cifs_fscache_release_client_cookie(server); |
2200 | ||
21e73393 SP |
2201 | kfree(server->session_key.response); |
2202 | server->session_key.response = NULL; | |
2203 | server->session_key.len = 0; | |
2204 | ||
e7ddee90 JL |
2205 | task = xchg(&server->tsk, NULL); |
2206 | if (task) | |
2207 | force_sig(SIGKILL, task); | |
1da177e4 LT |
2208 | } |
2209 | ||
63c038c2 JL |
2210 | static struct TCP_Server_Info * |
2211 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
2212 | { | |
2213 | struct TCP_Server_Info *tcp_ses = NULL; | |
a9ac49d3 | 2214 | struct sockaddr_storage addr; |
63c038c2 JL |
2215 | struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr; |
2216 | struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr; | |
2217 | int rc; | |
2218 | ||
a9ac49d3 | 2219 | memset(&addr, 0, sizeof(struct sockaddr_storage)); |
63c038c2 | 2220 | |
b6b38f70 | 2221 | cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip); |
63c038c2 | 2222 | |
1e68b2b2 | 2223 | if (volume_info->UNCip && volume_info->UNC) { |
50d97160 JL |
2224 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, |
2225 | volume_info->UNCip, | |
67b7626a | 2226 | strlen(volume_info->UNCip), |
50d97160 | 2227 | volume_info->port); |
1e68b2b2 | 2228 | if (!rc) { |
63c038c2 JL |
2229 | /* we failed translating address */ |
2230 | rc = -EINVAL; | |
2231 | goto out_err; | |
2232 | } | |
63c038c2 JL |
2233 | } else if (volume_info->UNCip) { |
2234 | /* BB using ip addr as tcp_ses name to connect to the | |
2235 | DFS root below */ | |
b6b38f70 | 2236 | cERROR(1, "Connecting to DFS root not implemented yet"); |
63c038c2 JL |
2237 | rc = -EINVAL; |
2238 | goto out_err; | |
2239 | } else /* which tcp_sess DFS root would we conect to */ { | |
b6b38f70 JP |
2240 | cERROR(1, "CIFS mount error: No UNC path (e.g. -o " |
2241 | "unc=//192.168.1.100/public) specified"); | |
63c038c2 JL |
2242 | rc = -EINVAL; |
2243 | goto out_err; | |
2244 | } | |
2245 | ||
2246 | /* see if we already have a matching tcp_ses */ | |
daf5b0b6 | 2247 | tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info); |
63c038c2 JL |
2248 | if (tcp_ses) |
2249 | return tcp_ses; | |
2250 | ||
2251 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
2252 | if (!tcp_ses) { | |
2253 | rc = -ENOMEM; | |
2254 | goto out_err; | |
2255 | } | |
2256 | ||
d2b91521 SP |
2257 | rc = cifs_crypto_shash_allocate(tcp_ses); |
2258 | if (rc) { | |
2259 | cERROR(1, "could not setup hash structures rc %d", rc); | |
2260 | goto out_err; | |
2261 | } | |
2262 | ||
23db65f5 JL |
2263 | tcp_ses->ops = volume_info->ops; |
2264 | tcp_ses->vals = volume_info->vals; | |
f1d0c998 | 2265 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
2266 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
2267 | if (IS_ERR(tcp_ses->hostname)) { | |
2268 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 2269 | goto out_err_crypto_release; |
63c038c2 JL |
2270 | } |
2271 | ||
2272 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
2273 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 2274 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
fc40f9cf | 2275 | tcp_ses->in_flight = 0; |
2d86dbc9 | 2276 | tcp_ses->credits = 1; |
63c038c2 JL |
2277 | init_waitqueue_head(&tcp_ses->response_q); |
2278 | init_waitqueue_head(&tcp_ses->request_q); | |
2279 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
2280 | mutex_init(&tcp_ses->srv_mutex); | |
2281 | memcpy(tcp_ses->workstation_RFC1001_name, | |
2282 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
2283 | memcpy(tcp_ses->server_RFC1001_name, | |
2284 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 2285 | tcp_ses->session_estab = false; |
63c038c2 | 2286 | tcp_ses->sequence_number = 0; |
fda35943 | 2287 | tcp_ses->lstrp = jiffies; |
58fa015f | 2288 | spin_lock_init(&tcp_ses->req_lock); |
63c038c2 JL |
2289 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
2290 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 2291 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
63c038c2 JL |
2292 | |
2293 | /* | |
2294 | * at this point we are the only ones with the pointer | |
2295 | * to the struct since the kernel thread not created yet | |
2296 | * no need to spinlock this init of tcpStatus or srv_count | |
2297 | */ | |
2298 | tcp_ses->tcpStatus = CifsNew; | |
3eb9a889 BG |
2299 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
2300 | sizeof(tcp_ses->srcaddr)); | |
63c038c2 JL |
2301 | ++tcp_ses->srv_count; |
2302 | ||
a9ac49d3 | 2303 | if (addr.ss_family == AF_INET6) { |
b6b38f70 | 2304 | cFYI(1, "attempting ipv6 connect"); |
63c038c2 JL |
2305 | /* BB should we allow ipv6 on port 139? */ |
2306 | /* other OS never observed in Wild doing 139 with v6 */ | |
a9f1b85e PS |
2307 | memcpy(&tcp_ses->dstaddr, sin_server6, |
2308 | sizeof(struct sockaddr_in6)); | |
2309 | } else | |
2310 | memcpy(&tcp_ses->dstaddr, sin_server, | |
2311 | sizeof(struct sockaddr_in)); | |
2312 | ||
2313 | rc = ip_connect(tcp_ses); | |
63c038c2 | 2314 | if (rc < 0) { |
b6b38f70 | 2315 | cERROR(1, "Error connecting to socket. Aborting operation"); |
f7c5445a | 2316 | goto out_err_crypto_release; |
63c038c2 JL |
2317 | } |
2318 | ||
2319 | /* | |
2320 | * since we're in a cifs function already, we know that | |
2321 | * this will succeed. No need for try_module_get(). | |
2322 | */ | |
2323 | __module_get(THIS_MODULE); | |
7c97c200 | 2324 | tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, |
63c038c2 JL |
2325 | tcp_ses, "cifsd"); |
2326 | if (IS_ERR(tcp_ses->tsk)) { | |
2327 | rc = PTR_ERR(tcp_ses->tsk); | |
b6b38f70 | 2328 | cERROR(1, "error %d create cifsd thread", rc); |
63c038c2 | 2329 | module_put(THIS_MODULE); |
f7c5445a | 2330 | goto out_err_crypto_release; |
63c038c2 | 2331 | } |
fd88ce93 | 2332 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
63c038c2 JL |
2333 | |
2334 | /* thread spawned, put it on the list */ | |
3f9bcca7 | 2335 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 2336 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 2337 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 2338 | |
488f1d2d SJ |
2339 | cifs_fscache_get_client_cookie(tcp_ses); |
2340 | ||
c74093b6 | 2341 | /* queue echo request delayed work */ |
da472fc8 | 2342 | queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL); |
c74093b6 | 2343 | |
63c038c2 JL |
2344 | return tcp_ses; |
2345 | ||
f7c5445a | 2346 | out_err_crypto_release: |
d2b91521 SP |
2347 | cifs_crypto_shash_release(tcp_ses); |
2348 | ||
f1d0c998 RL |
2349 | put_net(cifs_net_ns(tcp_ses)); |
2350 | ||
63c038c2 JL |
2351 | out_err: |
2352 | if (tcp_ses) { | |
8347a5cd SF |
2353 | if (!IS_ERR(tcp_ses->hostname)) |
2354 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
2355 | if (tcp_ses->ssocket) |
2356 | sock_release(tcp_ses->ssocket); | |
2357 | kfree(tcp_ses); | |
2358 | } | |
2359 | return ERR_PTR(rc); | |
2360 | } | |
2361 | ||
96daf2b0 | 2362 | static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
37bb04e5 PS |
2363 | { |
2364 | switch (ses->server->secType) { | |
2365 | case Kerberos: | |
2366 | if (vol->cred_uid != ses->cred_uid) | |
2367 | return 0; | |
2368 | break; | |
2369 | default: | |
04febabc JL |
2370 | /* NULL username means anonymous session */ |
2371 | if (ses->user_name == NULL) { | |
2372 | if (!vol->nullauth) | |
2373 | return 0; | |
2374 | break; | |
2375 | } | |
2376 | ||
37bb04e5 | 2377 | /* anything else takes username/password */ |
04febabc JL |
2378 | if (strncmp(ses->user_name, |
2379 | vol->username ? vol->username : "", | |
37bb04e5 PS |
2380 | MAX_USERNAME_SIZE)) |
2381 | return 0; | |
2382 | if (strlen(vol->username) != 0 && | |
2383 | ses->password != NULL && | |
2384 | strncmp(ses->password, | |
2385 | vol->password ? vol->password : "", | |
2386 | MAX_PASSWORD_SIZE)) | |
2387 | return 0; | |
2388 | } | |
2389 | return 1; | |
2390 | } | |
2391 | ||
96daf2b0 | 2392 | static struct cifs_ses * |
4ff67b72 | 2393 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 2394 | { |
96daf2b0 | 2395 | struct cifs_ses *ses; |
dea570e0 | 2396 | |
3f9bcca7 | 2397 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 | 2398 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
37bb04e5 PS |
2399 | if (!match_session(ses, vol)) |
2400 | continue; | |
14fbf50d | 2401 | ++ses->ses_count; |
3f9bcca7 | 2402 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2403 | return ses; |
2404 | } | |
3f9bcca7 | 2405 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2406 | return NULL; |
2407 | } | |
dea570e0 | 2408 | |
14fbf50d | 2409 | static void |
96daf2b0 | 2410 | cifs_put_smb_ses(struct cifs_ses *ses) |
14fbf50d JL |
2411 | { |
2412 | int xid; | |
2413 | struct TCP_Server_Info *server = ses->server; | |
dea570e0 | 2414 | |
36988c76 | 2415 | cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count); |
3f9bcca7 | 2416 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 2417 | if (--ses->ses_count > 0) { |
3f9bcca7 | 2418 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2419 | return; |
2420 | } | |
dea570e0 | 2421 | |
14fbf50d | 2422 | list_del_init(&ses->smb_ses_list); |
3f9bcca7 | 2423 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2424 | |
14fbf50d JL |
2425 | if (ses->status == CifsGood) { |
2426 | xid = GetXid(); | |
2427 | CIFSSMBLogoff(xid, ses); | |
2428 | _FreeXid(xid); | |
2429 | } | |
2430 | sesInfoFree(ses); | |
2431 | cifs_put_tcp_session(server); | |
2432 | } | |
dea570e0 | 2433 | |
8a8798a5 JL |
2434 | #ifdef CONFIG_KEYS |
2435 | ||
2436 | /* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */ | |
2437 | #define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1) | |
2438 | ||
2439 | /* Populate username and pw fields from keyring if possible */ | |
2440 | static int | |
2441 | cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) | |
2442 | { | |
2443 | int rc = 0; | |
2444 | char *desc, *delim, *payload; | |
2445 | ssize_t len; | |
2446 | struct key *key; | |
2447 | struct TCP_Server_Info *server = ses->server; | |
2448 | struct sockaddr_in *sa; | |
2449 | struct sockaddr_in6 *sa6; | |
2450 | struct user_key_payload *upayload; | |
2451 | ||
2452 | desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL); | |
2453 | if (!desc) | |
2454 | return -ENOMEM; | |
2455 | ||
2456 | /* try to find an address key first */ | |
2457 | switch (server->dstaddr.ss_family) { | |
2458 | case AF_INET: | |
2459 | sa = (struct sockaddr_in *)&server->dstaddr; | |
2460 | sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr); | |
2461 | break; | |
2462 | case AF_INET6: | |
2463 | sa6 = (struct sockaddr_in6 *)&server->dstaddr; | |
2464 | sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr); | |
2465 | break; | |
2466 | default: | |
2467 | cFYI(1, "Bad ss_family (%hu)", server->dstaddr.ss_family); | |
2468 | rc = -EINVAL; | |
2469 | goto out_err; | |
2470 | } | |
2471 | ||
2472 | cFYI(1, "%s: desc=%s", __func__, desc); | |
2473 | key = request_key(&key_type_logon, desc, ""); | |
2474 | if (IS_ERR(key)) { | |
2475 | if (!ses->domainName) { | |
2476 | cFYI(1, "domainName is NULL"); | |
2477 | rc = PTR_ERR(key); | |
2478 | goto out_err; | |
2479 | } | |
2480 | ||
2481 | /* didn't work, try to find a domain key */ | |
2482 | sprintf(desc, "cifs:d:%s", ses->domainName); | |
2483 | cFYI(1, "%s: desc=%s", __func__, desc); | |
2484 | key = request_key(&key_type_logon, desc, ""); | |
2485 | if (IS_ERR(key)) { | |
2486 | rc = PTR_ERR(key); | |
2487 | goto out_err; | |
2488 | } | |
2489 | } | |
2490 | ||
2491 | down_read(&key->sem); | |
2492 | upayload = key->payload.data; | |
2493 | if (IS_ERR_OR_NULL(upayload)) { | |
4edc53c1 | 2494 | rc = upayload ? PTR_ERR(upayload) : -EINVAL; |
8a8798a5 JL |
2495 | goto out_key_put; |
2496 | } | |
2497 | ||
2498 | /* find first : in payload */ | |
2499 | payload = (char *)upayload->data; | |
2500 | delim = strnchr(payload, upayload->datalen, ':'); | |
2501 | cFYI(1, "payload=%s", payload); | |
2502 | if (!delim) { | |
2503 | cFYI(1, "Unable to find ':' in payload (datalen=%d)", | |
2504 | upayload->datalen); | |
2505 | rc = -EINVAL; | |
2506 | goto out_key_put; | |
2507 | } | |
2508 | ||
2509 | len = delim - payload; | |
2510 | if (len > MAX_USERNAME_SIZE || len <= 0) { | |
000f9bb8 | 2511 | cFYI(1, "Bad value from username search (len=%zd)", len); |
8a8798a5 JL |
2512 | rc = -EINVAL; |
2513 | goto out_key_put; | |
2514 | } | |
2515 | ||
2516 | vol->username = kstrndup(payload, len, GFP_KERNEL); | |
2517 | if (!vol->username) { | |
000f9bb8 | 2518 | cFYI(1, "Unable to allocate %zd bytes for username", len); |
8a8798a5 JL |
2519 | rc = -ENOMEM; |
2520 | goto out_key_put; | |
2521 | } | |
2522 | cFYI(1, "%s: username=%s", __func__, vol->username); | |
2523 | ||
2524 | len = key->datalen - (len + 1); | |
2525 | if (len > MAX_PASSWORD_SIZE || len <= 0) { | |
000f9bb8 | 2526 | cFYI(1, "Bad len for password search (len=%zd)", len); |
8a8798a5 JL |
2527 | rc = -EINVAL; |
2528 | kfree(vol->username); | |
2529 | vol->username = NULL; | |
2530 | goto out_key_put; | |
2531 | } | |
2532 | ||
2533 | ++delim; | |
2534 | vol->password = kstrndup(delim, len, GFP_KERNEL); | |
2535 | if (!vol->password) { | |
000f9bb8 | 2536 | cFYI(1, "Unable to allocate %zd bytes for password", len); |
8a8798a5 JL |
2537 | rc = -ENOMEM; |
2538 | kfree(vol->username); | |
2539 | vol->username = NULL; | |
2540 | goto out_key_put; | |
2541 | } | |
2542 | ||
2543 | out_key_put: | |
2544 | up_read(&key->sem); | |
2545 | key_put(key); | |
2546 | out_err: | |
2547 | kfree(desc); | |
2548 | cFYI(1, "%s: returning %d", __func__, rc); | |
2549 | return rc; | |
2550 | } | |
2551 | #else /* ! CONFIG_KEYS */ | |
2552 | static inline int | |
2553 | cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), | |
2554 | struct cifs_ses *ses __attribute__((unused))) | |
2555 | { | |
2556 | return -ENOSYS; | |
2557 | } | |
2558 | #endif /* CONFIG_KEYS */ | |
2559 | ||
d9b94201 SF |
2560 | static bool warned_on_ntlm; /* globals init to false automatically */ |
2561 | ||
96daf2b0 | 2562 | static struct cifs_ses * |
36988c76 JL |
2563 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
2564 | { | |
2565 | int rc = -ENOMEM, xid; | |
96daf2b0 | 2566 | struct cifs_ses *ses; |
a9f1b85e PS |
2567 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
2568 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 JL |
2569 | |
2570 | xid = GetXid(); | |
2571 | ||
4ff67b72 | 2572 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 JL |
2573 | if (ses) { |
2574 | cFYI(1, "Existing smb sess found (status=%d)", ses->status); | |
2575 | ||
36988c76 | 2576 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
2577 | rc = cifs_negotiate_protocol(xid, ses); |
2578 | if (rc) { | |
2579 | mutex_unlock(&ses->session_mutex); | |
2580 | /* problem -- put our ses reference */ | |
2581 | cifs_put_smb_ses(ses); | |
2582 | FreeXid(xid); | |
2583 | return ERR_PTR(rc); | |
2584 | } | |
36988c76 JL |
2585 | if (ses->need_reconnect) { |
2586 | cFYI(1, "Session needs reconnect"); | |
2587 | rc = cifs_setup_session(xid, ses, | |
2588 | volume_info->local_nls); | |
2589 | if (rc) { | |
2590 | mutex_unlock(&ses->session_mutex); | |
2591 | /* problem -- put our reference */ | |
2592 | cifs_put_smb_ses(ses); | |
2593 | FreeXid(xid); | |
2594 | return ERR_PTR(rc); | |
2595 | } | |
2596 | } | |
2597 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
2598 | |
2599 | /* existing SMB ses has a server reference already */ | |
2600 | cifs_put_tcp_session(server); | |
36988c76 JL |
2601 | FreeXid(xid); |
2602 | return ses; | |
2603 | } | |
2604 | ||
2605 | cFYI(1, "Existing smb sess not found"); | |
2606 | ses = sesInfoAlloc(); | |
2607 | if (ses == NULL) | |
2608 | goto get_ses_fail; | |
2609 | ||
2610 | /* new SMB session uses our server ref */ | |
2611 | ses->server = server; | |
a9f1b85e PS |
2612 | if (server->dstaddr.ss_family == AF_INET6) |
2613 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 2614 | else |
a9f1b85e | 2615 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 2616 | |
8727c8a8 SF |
2617 | if (volume_info->username) { |
2618 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
2619 | if (!ses->user_name) | |
2620 | goto get_ses_fail; | |
2621 | } | |
36988c76 JL |
2622 | |
2623 | /* volume_info->password freed at unmount */ | |
2624 | if (volume_info->password) { | |
2625 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2626 | if (!ses->password) | |
2627 | goto get_ses_fail; | |
2628 | } | |
2629 | if (volume_info->domainname) { | |
d3686d54 SP |
2630 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
2631 | if (!ses->domainName) | |
2632 | goto get_ses_fail; | |
36988c76 | 2633 | } |
3e4b3e1f | 2634 | ses->cred_uid = volume_info->cred_uid; |
36988c76 | 2635 | ses->linux_uid = volume_info->linux_uid; |
d9b94201 SF |
2636 | |
2637 | /* ntlmv2 is much stronger than ntlm security, and has been broadly | |
2638 | supported for many years, time to update default security mechanism */ | |
2639 | if ((volume_info->secFlg == 0) && warned_on_ntlm == false) { | |
2640 | warned_on_ntlm = true; | |
2641 | cERROR(1, "default security mechanism requested. The default " | |
2642 | "security mechanism will be upgraded from ntlm to " | |
225de11e | 2643 | "ntlmv2 in kernel release 3.3"); |
d9b94201 | 2644 | } |
36988c76 JL |
2645 | ses->overrideSecFlg = volume_info->secFlg; |
2646 | ||
2647 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
2648 | rc = cifs_negotiate_protocol(xid, ses); |
2649 | if (!rc) | |
2650 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 2651 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 2652 | if (rc) |
36988c76 JL |
2653 | goto get_ses_fail; |
2654 | ||
2655 | /* success, put it on the list */ | |
3f9bcca7 | 2656 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 2657 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 2658 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 JL |
2659 | |
2660 | FreeXid(xid); | |
2661 | return ses; | |
2662 | ||
2663 | get_ses_fail: | |
2664 | sesInfoFree(ses); | |
2665 | FreeXid(xid); | |
2666 | return ERR_PTR(rc); | |
2667 | } | |
2668 | ||
96daf2b0 | 2669 | static int match_tcon(struct cifs_tcon *tcon, const char *unc) |
37bb04e5 PS |
2670 | { |
2671 | if (tcon->tidStatus == CifsExiting) | |
2672 | return 0; | |
2673 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) | |
2674 | return 0; | |
2675 | return 1; | |
2676 | } | |
2677 | ||
96daf2b0 SF |
2678 | static struct cifs_tcon * |
2679 | cifs_find_tcon(struct cifs_ses *ses, const char *unc) | |
f1987b44 JL |
2680 | { |
2681 | struct list_head *tmp; | |
96daf2b0 | 2682 | struct cifs_tcon *tcon; |
f1987b44 | 2683 | |
3f9bcca7 | 2684 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2685 | list_for_each(tmp, &ses->tcon_list) { |
96daf2b0 | 2686 | tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
37bb04e5 | 2687 | if (!match_tcon(tcon, unc)) |
f1987b44 | 2688 | continue; |
f1987b44 | 2689 | ++tcon->tc_count; |
3f9bcca7 | 2690 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2691 | return tcon; |
1da177e4 | 2692 | } |
3f9bcca7 | 2693 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2694 | return NULL; |
2695 | } | |
2696 | ||
f1987b44 | 2697 | static void |
96daf2b0 | 2698 | cifs_put_tcon(struct cifs_tcon *tcon) |
f1987b44 JL |
2699 | { |
2700 | int xid; | |
96daf2b0 | 2701 | struct cifs_ses *ses = tcon->ses; |
f1987b44 | 2702 | |
d00c28de | 2703 | cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
3f9bcca7 | 2704 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2705 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 2706 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2707 | return; |
2708 | } | |
2709 | ||
2710 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 2711 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2712 | |
2713 | xid = GetXid(); | |
2714 | CIFSSMBTDis(xid, tcon); | |
2715 | _FreeXid(xid); | |
2716 | ||
d03382ce | 2717 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 2718 | tconInfoFree(tcon); |
f1987b44 JL |
2719 | cifs_put_smb_ses(ses); |
2720 | } | |
2721 | ||
96daf2b0 SF |
2722 | static struct cifs_tcon * |
2723 | cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) | |
d00c28de JL |
2724 | { |
2725 | int rc, xid; | |
96daf2b0 | 2726 | struct cifs_tcon *tcon; |
d00c28de JL |
2727 | |
2728 | tcon = cifs_find_tcon(ses, volume_info->UNC); | |
2729 | if (tcon) { | |
2730 | cFYI(1, "Found match on UNC path"); | |
2731 | /* existing tcon already has a reference */ | |
2732 | cifs_put_smb_ses(ses); | |
2733 | if (tcon->seal != volume_info->seal) | |
2734 | cERROR(1, "transport encryption setting " | |
2735 | "conflicts with existing tid"); | |
2736 | return tcon; | |
2737 | } | |
2738 | ||
2739 | tcon = tconInfoAlloc(); | |
2740 | if (tcon == NULL) { | |
2741 | rc = -ENOMEM; | |
2742 | goto out_fail; | |
2743 | } | |
2744 | ||
2745 | tcon->ses = ses; | |
2746 | if (volume_info->password) { | |
2747 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2748 | if (!tcon->password) { | |
2749 | rc = -ENOMEM; | |
2750 | goto out_fail; | |
2751 | } | |
2752 | } | |
2753 | ||
2754 | if (strchr(volume_info->UNC + 3, '\\') == NULL | |
2755 | && strchr(volume_info->UNC + 3, '/') == NULL) { | |
2756 | cERROR(1, "Missing share name"); | |
2757 | rc = -ENODEV; | |
2758 | goto out_fail; | |
2759 | } | |
2760 | ||
2761 | /* BB Do we need to wrap session_mutex around | |
2762 | * this TCon call and Unix SetFS as | |
2763 | * we do on SessSetup and reconnect? */ | |
2764 | xid = GetXid(); | |
2765 | rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls); | |
2766 | FreeXid(xid); | |
2767 | cFYI(1, "CIFS Tcon rc = %d", rc); | |
2768 | if (rc) | |
2769 | goto out_fail; | |
2770 | ||
2771 | if (volume_info->nodfs) { | |
2772 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
2773 | cFYI(1, "DFS disabled (%d)", tcon->Flags); | |
2774 | } | |
2775 | tcon->seal = volume_info->seal; | |
2776 | /* we can have only one retry value for a connection | |
2777 | to a share so for resources mounted more than once | |
2778 | to the same server share the last value passed in | |
2779 | for the retry flag is used */ | |
2780 | tcon->retry = volume_info->retry; | |
2781 | tcon->nocase = volume_info->nocase; | |
2782 | tcon->local_lease = volume_info->local_lease; | |
2783 | ||
3f9bcca7 | 2784 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 2785 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 2786 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 2787 | |
d03382ce SJ |
2788 | cifs_fscache_get_super_cookie(tcon); |
2789 | ||
d00c28de JL |
2790 | return tcon; |
2791 | ||
2792 | out_fail: | |
2793 | tconInfoFree(tcon); | |
2794 | return ERR_PTR(rc); | |
2795 | } | |
2796 | ||
9d002df4 JL |
2797 | void |
2798 | cifs_put_tlink(struct tcon_link *tlink) | |
2799 | { | |
2800 | if (!tlink || IS_ERR(tlink)) | |
2801 | return; | |
2802 | ||
2803 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
2804 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
2805 | tlink->tl_time = jiffies; | |
2806 | return; | |
2807 | } | |
2808 | ||
2809 | if (!IS_ERR(tlink_tcon(tlink))) | |
2810 | cifs_put_tcon(tlink_tcon(tlink)); | |
2811 | kfree(tlink); | |
2812 | return; | |
2813 | } | |
d00c28de | 2814 | |
25c7f41e | 2815 | static inline struct tcon_link * |
cd51875d PS |
2816 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
2817 | { | |
2818 | return cifs_sb->master_tlink; | |
2819 | } | |
25c7f41e PS |
2820 | |
2821 | static int | |
2822 | compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
2823 | { | |
2824 | struct cifs_sb_info *old = CIFS_SB(sb); | |
2825 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
2826 | ||
2827 | if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) | |
2828 | return 0; | |
2829 | ||
2830 | if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) != | |
2831 | (new->mnt_cifs_flags & CIFS_MOUNT_MASK)) | |
2832 | return 0; | |
2833 | ||
25c7f41e | 2834 | /* |
5eba8ab3 JL |
2835 | * We want to share sb only if we don't specify an r/wsize or |
2836 | * specified r/wsize is greater than or equal to existing one. | |
25c7f41e PS |
2837 | */ |
2838 | if (new->wsize && new->wsize < old->wsize) | |
2839 | return 0; | |
2840 | ||
5eba8ab3 JL |
2841 | if (new->rsize && new->rsize < old->rsize) |
2842 | return 0; | |
2843 | ||
25c7f41e PS |
2844 | if (old->mnt_uid != new->mnt_uid || old->mnt_gid != new->mnt_gid) |
2845 | return 0; | |
2846 | ||
2847 | if (old->mnt_file_mode != new->mnt_file_mode || | |
2848 | old->mnt_dir_mode != new->mnt_dir_mode) | |
2849 | return 0; | |
2850 | ||
2851 | if (strcmp(old->local_nls->charset, new->local_nls->charset)) | |
2852 | return 0; | |
2853 | ||
2854 | if (old->actimeo != new->actimeo) | |
2855 | return 0; | |
2856 | ||
2857 | return 1; | |
2858 | } | |
2859 | ||
2860 | int | |
2861 | cifs_match_super(struct super_block *sb, void *data) | |
2862 | { | |
2863 | struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; | |
2864 | struct smb_vol *volume_info; | |
2865 | struct cifs_sb_info *cifs_sb; | |
2866 | struct TCP_Server_Info *tcp_srv; | |
96daf2b0 SF |
2867 | struct cifs_ses *ses; |
2868 | struct cifs_tcon *tcon; | |
25c7f41e PS |
2869 | struct tcon_link *tlink; |
2870 | struct sockaddr_storage addr; | |
2871 | int rc = 0; | |
2872 | ||
2873 | memset(&addr, 0, sizeof(struct sockaddr_storage)); | |
2874 | ||
2875 | spin_lock(&cifs_tcp_ses_lock); | |
2876 | cifs_sb = CIFS_SB(sb); | |
2877 | tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
2878 | if (IS_ERR(tlink)) { | |
2879 | spin_unlock(&cifs_tcp_ses_lock); | |
2880 | return rc; | |
2881 | } | |
2882 | tcon = tlink_tcon(tlink); | |
2883 | ses = tcon->ses; | |
2884 | tcp_srv = ses->server; | |
2885 | ||
2886 | volume_info = mnt_data->vol; | |
2887 | ||
2888 | if (!volume_info->UNCip || !volume_info->UNC) | |
2889 | goto out; | |
2890 | ||
2891 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, | |
2892 | volume_info->UNCip, | |
2893 | strlen(volume_info->UNCip), | |
2894 | volume_info->port); | |
2895 | if (!rc) | |
2896 | goto out; | |
2897 | ||
2898 | if (!match_server(tcp_srv, (struct sockaddr *)&addr, volume_info) || | |
2899 | !match_session(ses, volume_info) || | |
2900 | !match_tcon(tcon, volume_info->UNC)) { | |
2901 | rc = 0; | |
2902 | goto out; | |
2903 | } | |
2904 | ||
2905 | rc = compare_mount_options(sb, mnt_data); | |
2906 | out: | |
25c7f41e | 2907 | spin_unlock(&cifs_tcp_ses_lock); |
f484b5d0 | 2908 | cifs_put_tlink(tlink); |
25c7f41e PS |
2909 | return rc; |
2910 | } | |
2911 | ||
1da177e4 | 2912 | int |
96daf2b0 | 2913 | get_dfs_path(int xid, struct cifs_ses *pSesInfo, const char *old_path, |
50c2f753 | 2914 | const struct nls_table *nls_codepage, unsigned int *pnum_referrals, |
366781c1 | 2915 | struct dfs_info3_param **preferrals, int remap) |
1da177e4 LT |
2916 | { |
2917 | char *temp_unc; | |
2918 | int rc = 0; | |
2919 | ||
2920 | *pnum_referrals = 0; | |
366781c1 | 2921 | *preferrals = NULL; |
1da177e4 LT |
2922 | |
2923 | if (pSesInfo->ipc_tid == 0) { | |
2924 | temp_unc = kmalloc(2 /* for slashes */ + | |
50c2f753 SF |
2925 | strnlen(pSesInfo->serverName, |
2926 | SERVER_NAME_LEN_WITH_NULL * 2) | |
1da177e4 LT |
2927 | + 1 + 4 /* slash IPC$ */ + 2, |
2928 | GFP_KERNEL); | |
2929 | if (temp_unc == NULL) | |
2930 | return -ENOMEM; | |
2931 | temp_unc[0] = '\\'; | |
2932 | temp_unc[1] = '\\'; | |
2933 | strcpy(temp_unc + 2, pSesInfo->serverName); | |
2934 | strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$"); | |
2935 | rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage); | |
b6b38f70 | 2936 | cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid); |
1da177e4 LT |
2937 | kfree(temp_unc); |
2938 | } | |
2939 | if (rc == 0) | |
c2cf07d5 | 2940 | rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals, |
737b758c | 2941 | pnum_referrals, nls_codepage, remap); |
366781c1 SF |
2942 | /* BB map targetUNCs to dfs_info3 structures, here or |
2943 | in CIFSGetDFSRefer BB */ | |
1da177e4 LT |
2944 | |
2945 | return rc; | |
2946 | } | |
2947 | ||
09e50d55 JL |
2948 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
2949 | static struct lock_class_key cifs_key[2]; | |
2950 | static struct lock_class_key cifs_slock_key[2]; | |
2951 | ||
2952 | static inline void | |
2953 | cifs_reclassify_socket4(struct socket *sock) | |
2954 | { | |
2955 | struct sock *sk = sock->sk; | |
2956 | BUG_ON(sock_owned_by_user(sk)); | |
2957 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", | |
2958 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
2959 | } | |
2960 | ||
2961 | static inline void | |
2962 | cifs_reclassify_socket6(struct socket *sock) | |
2963 | { | |
2964 | struct sock *sk = sock->sk; | |
2965 | BUG_ON(sock_owned_by_user(sk)); | |
2966 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", | |
2967 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
2968 | } | |
2969 | #else | |
2970 | static inline void | |
2971 | cifs_reclassify_socket4(struct socket *sock) | |
2972 | { | |
2973 | } | |
2974 | ||
2975 | static inline void | |
2976 | cifs_reclassify_socket6(struct socket *sock) | |
2977 | { | |
2978 | } | |
2979 | #endif | |
2980 | ||
1da177e4 | 2981 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 2982 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 2983 | { |
50c2f753 | 2984 | unsigned int i, j; |
1da177e4 | 2985 | |
50c2f753 | 2986 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
2987 | /* mask a nibble at a time and encode */ |
2988 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
2989 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 2990 | j += 2; |
1da177e4 LT |
2991 | } |
2992 | ||
2993 | } | |
2994 | ||
3eb9a889 BG |
2995 | static int |
2996 | bind_socket(struct TCP_Server_Info *server) | |
2997 | { | |
2998 | int rc = 0; | |
2999 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
3000 | /* Bind to the specified local IP address */ | |
3001 | struct socket *socket = server->ssocket; | |
3002 | rc = socket->ops->bind(socket, | |
3003 | (struct sockaddr *) &server->srcaddr, | |
3004 | sizeof(server->srcaddr)); | |
3005 | if (rc < 0) { | |
3006 | struct sockaddr_in *saddr4; | |
3007 | struct sockaddr_in6 *saddr6; | |
3008 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
3009 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
3010 | if (saddr6->sin6_family == AF_INET6) | |
3011 | cERROR(1, "cifs: " | |
3012 | "Failed to bind to: %pI6c, error: %d\n", | |
3013 | &saddr6->sin6_addr, rc); | |
3014 | else | |
3015 | cERROR(1, "cifs: " | |
3016 | "Failed to bind to: %pI4, error: %d\n", | |
3017 | &saddr4->sin_addr.s_addr, rc); | |
3018 | } | |
3019 | } | |
3020 | return rc; | |
3021 | } | |
1da177e4 LT |
3022 | |
3023 | static int | |
a9f1b85e | 3024 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
3025 | { |
3026 | int rc = 0; | |
a9f1b85e PS |
3027 | /* |
3028 | * some servers require RFC1001 sessinit before sending | |
3029 | * negprot - BB check reconnection in case where second | |
3030 | * sessinit is sent but no second negprot | |
3031 | */ | |
3032 | struct rfc1002_session_packet *ses_init_buf; | |
3033 | struct smb_hdr *smb_buf; | |
3034 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
3035 | GFP_KERNEL); | |
3036 | if (ses_init_buf) { | |
3037 | ses_init_buf->trailer.session_req.called_len = 32; | |
3038 | ||
3039 | if (server->server_RFC1001_name && | |
3040 | server->server_RFC1001_name[0] != 0) | |
3041 | rfc1002mangle(ses_init_buf->trailer. | |
3042 | session_req.called_name, | |
3043 | server->server_RFC1001_name, | |
3044 | RFC1001_NAME_LEN_WITH_NULL); | |
3045 | else | |
3046 | rfc1002mangle(ses_init_buf->trailer. | |
3047 | session_req.called_name, | |
3048 | DEFAULT_CIFS_CALLED_NAME, | |
3049 | RFC1001_NAME_LEN_WITH_NULL); | |
3050 | ||
3051 | ses_init_buf->trailer.session_req.calling_len = 32; | |
3052 | ||
3053 | /* | |
3054 | * calling name ends in null (byte 16) from old smb | |
3055 | * convention. | |
3056 | */ | |
3057 | if (server->workstation_RFC1001_name && | |
3058 | server->workstation_RFC1001_name[0] != 0) | |
3059 | rfc1002mangle(ses_init_buf->trailer. | |
3060 | session_req.calling_name, | |
3061 | server->workstation_RFC1001_name, | |
3062 | RFC1001_NAME_LEN_WITH_NULL); | |
3063 | else | |
3064 | rfc1002mangle(ses_init_buf->trailer. | |
3065 | session_req.calling_name, | |
3066 | "LINUX_CIFS_CLNT", | |
3067 | RFC1001_NAME_LEN_WITH_NULL); | |
3068 | ||
3069 | ses_init_buf->trailer.session_req.scope1 = 0; | |
3070 | ses_init_buf->trailer.session_req.scope2 = 0; | |
3071 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
3072 | ||
3073 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
be8e3b00 | 3074 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
a9f1b85e PS |
3075 | rc = smb_send(server, smb_buf, 0x44); |
3076 | kfree(ses_init_buf); | |
3077 | /* | |
3078 | * RFC1001 layer in at least one server | |
3079 | * requires very short break before negprot | |
3080 | * presumably because not expecting negprot | |
3081 | * to follow so fast. This is a simple | |
3082 | * solution that works without | |
3083 | * complicating the code and causes no | |
3084 | * significant slowing down on mount | |
3085 | * for everyone else | |
3086 | */ | |
3087 | usleep_range(1000, 2000); | |
3088 | } | |
3089 | /* | |
3090 | * else the negprot may still work without this | |
3091 | * even though malloc failed | |
3092 | */ | |
3093 | ||
3094 | return rc; | |
3095 | } | |
3096 | ||
3097 | static int | |
3098 | generic_ip_connect(struct TCP_Server_Info *server) | |
3099 | { | |
3100 | int rc = 0; | |
6da97910 | 3101 | __be16 sport; |
a9f1b85e | 3102 | int slen, sfamily; |
bcf4b106 | 3103 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
3104 | struct sockaddr *saddr; |
3105 | ||
3106 | saddr = (struct sockaddr *) &server->dstaddr; | |
3107 | ||
3108 | if (server->dstaddr.ss_family == AF_INET6) { | |
3109 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
3110 | slen = sizeof(struct sockaddr_in6); | |
3111 | sfamily = AF_INET6; | |
3112 | } else { | |
3113 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
3114 | slen = sizeof(struct sockaddr_in); | |
3115 | sfamily = AF_INET; | |
3116 | } | |
1da177e4 | 3117 | |
bcf4b106 | 3118 | if (socket == NULL) { |
f1d0c998 RL |
3119 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
3120 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 3121 | if (rc < 0) { |
b6b38f70 | 3122 | cERROR(1, "Error %d creating socket", rc); |
a9f1b85e | 3123 | server->ssocket = NULL; |
1da177e4 | 3124 | return rc; |
1da177e4 | 3125 | } |
bcf4b106 JL |
3126 | |
3127 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
b6b38f70 | 3128 | cFYI(1, "Socket created"); |
bcf4b106 JL |
3129 | server->ssocket = socket; |
3130 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
3131 | if (sfamily == AF_INET6) |
3132 | cifs_reclassify_socket6(socket); | |
3133 | else | |
3134 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
3135 | } |
3136 | ||
3eb9a889 BG |
3137 | rc = bind_socket(server); |
3138 | if (rc < 0) | |
3139 | return rc; | |
3140 | ||
bcf4b106 JL |
3141 | /* |
3142 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
3143 | * the default. sock_setsockopt not used because it expects |
3144 | * user space buffer | |
bcf4b106 JL |
3145 | */ |
3146 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 3147 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 3148 | |
b387eaeb | 3149 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
3150 | if (server->noautotune) { |
3151 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
3152 | socket->sk->sk_sndbuf = 200 * 1024; | |
3153 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
3154 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 3155 | } |
1da177e4 | 3156 | |
6a5fa236 | 3157 | if (server->tcp_nodelay) { |
a9f1b85e | 3158 | int val = 1; |
6a5fa236 SF |
3159 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
3160 | (char *)&val, sizeof(val)); | |
3161 | if (rc) | |
b6b38f70 | 3162 | cFYI(1, "set TCP_NODELAY socket option error %d", rc); |
6a5fa236 SF |
3163 | } |
3164 | ||
b6b38f70 | 3165 | cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx", |
bcf4b106 | 3166 | socket->sk->sk_sndbuf, |
b6b38f70 | 3167 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 3168 | |
ee1b3ea9 JL |
3169 | rc = socket->ops->connect(socket, saddr, slen, 0); |
3170 | if (rc < 0) { | |
3171 | cFYI(1, "Error %d connecting to server", rc); | |
3172 | sock_release(socket); | |
3173 | server->ssocket = NULL; | |
3174 | return rc; | |
3175 | } | |
3176 | ||
a9f1b85e PS |
3177 | if (sport == htons(RFC1001_PORT)) |
3178 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 3179 | |
1da177e4 LT |
3180 | return rc; |
3181 | } | |
3182 | ||
3183 | static int | |
a9f1b85e | 3184 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 3185 | { |
6da97910 | 3186 | __be16 *sport; |
a9f1b85e PS |
3187 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
3188 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 3189 | |
a9f1b85e PS |
3190 | if (server->dstaddr.ss_family == AF_INET6) |
3191 | sport = &addr6->sin6_port; | |
3192 | else | |
3193 | sport = &addr->sin_port; | |
1da177e4 | 3194 | |
a9f1b85e PS |
3195 | if (*sport == 0) { |
3196 | int rc; | |
1da177e4 | 3197 | |
a9f1b85e PS |
3198 | /* try with 445 port at first */ |
3199 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 3200 | |
a9f1b85e | 3201 | rc = generic_ip_connect(server); |
1da177e4 | 3202 | if (rc >= 0) |
a9f1b85e | 3203 | return rc; |
6a5fa236 | 3204 | |
a9f1b85e PS |
3205 | /* if it failed, try with 139 port */ |
3206 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
3207 | } |
3208 | ||
a9f1b85e | 3209 | return generic_ip_connect(server); |
1da177e4 LT |
3210 | } |
3211 | ||
96daf2b0 | 3212 | void reset_cifs_unix_caps(int xid, struct cifs_tcon *tcon, |
2c6292ae | 3213 | struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) |
8af18971 SF |
3214 | { |
3215 | /* if we are reconnecting then should we check to see if | |
3216 | * any requested capabilities changed locally e.g. via | |
3217 | * remount but we can not do much about it here | |
3218 | * if they have (even if we could detect it by the following) | |
3219 | * Perhaps we could add a backpointer to array of sb from tcon | |
3220 | * or if we change to make all sb to same share the same | |
3221 | * sb as NFS - then we only have one backpointer to sb. | |
3222 | * What if we wanted to mount the server share twice once with | |
3223 | * and once without posixacls or posix paths? */ | |
3224 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 3225 | |
c18c842b SF |
3226 | if (vol_info && vol_info->no_linux_ext) { |
3227 | tcon->fsUnixInfo.Capability = 0; | |
3228 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
b6b38f70 | 3229 | cFYI(1, "Linux protocol extensions disabled"); |
c18c842b SF |
3230 | return; |
3231 | } else if (vol_info) | |
3232 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
3233 | ||
3234 | if (tcon->unix_ext == 0) { | |
b6b38f70 | 3235 | cFYI(1, "Unix extensions disabled so not set on reconnect"); |
c18c842b SF |
3236 | return; |
3237 | } | |
50c2f753 | 3238 | |
fb8c4b14 | 3239 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 3240 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
6848b733 | 3241 | cFYI(1, "unix caps which server supports %lld", cap); |
8af18971 SF |
3242 | /* check for reconnect case in which we do not |
3243 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 3244 | if (vol_info == NULL) { |
50c2f753 | 3245 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
3246 | originally at mount time */ |
3247 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
3248 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
3249 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
3250 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
b6b38f70 | 3251 | cERROR(1, "POSIXPATH support change"); |
8af18971 | 3252 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 3253 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
b6b38f70 JP |
3254 | cERROR(1, "possible reconnect error"); |
3255 | cERROR(1, "server disabled POSIX path support"); | |
11b6d645 | 3256 | } |
8af18971 | 3257 | } |
50c2f753 | 3258 | |
6848b733 SF |
3259 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
3260 | cERROR(1, "per-share encryption not supported yet"); | |
3261 | ||
8af18971 | 3262 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 3263 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 3264 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 3265 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
b6b38f70 | 3266 | cFYI(1, "negotiated posix acl support"); |
2c6292ae AV |
3267 | if (cifs_sb) |
3268 | cifs_sb->mnt_cifs_flags |= | |
3269 | CIFS_MOUNT_POSIXACL; | |
8af18971 SF |
3270 | } |
3271 | ||
75865f8c | 3272 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 3273 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 3274 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
b6b38f70 | 3275 | cFYI(1, "negotiate posix pathnames"); |
2c6292ae AV |
3276 | if (cifs_sb) |
3277 | cifs_sb->mnt_cifs_flags |= | |
8af18971 SF |
3278 | CIFS_MOUNT_POSIX_PATHS; |
3279 | } | |
50c2f753 | 3280 | |
b6b38f70 | 3281 | cFYI(1, "Negotiate caps 0x%x", (int)cap); |
8af18971 | 3282 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 3283 | if (cap & CIFS_UNIX_FCNTL_CAP) |
b6b38f70 | 3284 | cFYI(1, "FCNTL cap"); |
75865f8c | 3285 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
b6b38f70 | 3286 | cFYI(1, "EXTATTR cap"); |
75865f8c | 3287 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
b6b38f70 | 3288 | cFYI(1, "POSIX path cap"); |
75865f8c | 3289 | if (cap & CIFS_UNIX_XATTR_CAP) |
b6b38f70 | 3290 | cFYI(1, "XATTR cap"); |
75865f8c | 3291 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
b6b38f70 | 3292 | cFYI(1, "POSIX ACL cap"); |
75865f8c | 3293 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
b6b38f70 | 3294 | cFYI(1, "very large read cap"); |
75865f8c | 3295 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
b6b38f70 | 3296 | cFYI(1, "very large write cap"); |
6848b733 SF |
3297 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
3298 | cFYI(1, "transport encryption cap"); | |
3299 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) | |
3300 | cFYI(1, "mandatory transport encryption cap"); | |
8af18971 SF |
3301 | #endif /* CIFS_DEBUG2 */ |
3302 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 3303 | if (vol_info == NULL) { |
b6b38f70 | 3304 | cFYI(1, "resetting capabilities failed"); |
442aa310 | 3305 | } else |
b6b38f70 | 3306 | cERROR(1, "Negotiating Unix capabilities " |
5a44b319 SF |
3307 | "with the server failed. Consider " |
3308 | "mounting with the Unix Extensions\n" | |
3309 | "disabled, if problems are found, " | |
3310 | "by specifying the nounix mount " | |
b6b38f70 | 3311 | "option."); |
5a44b319 | 3312 | |
8af18971 SF |
3313 | } |
3314 | } | |
3315 | } | |
3316 | ||
724d9f1c PS |
3317 | void cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
3318 | struct cifs_sb_info *cifs_sb) | |
b1c8d2b4 | 3319 | { |
2de970ff JL |
3320 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
3321 | ||
2ced6f69 AV |
3322 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
3323 | cifs_sb->tlink_tree = RB_ROOT; | |
3324 | ||
25c7f41e | 3325 | /* |
5eba8ab3 JL |
3326 | * Temporarily set r/wsize for matching superblock. If we end up using |
3327 | * new sb then client will later negotiate it downward if needed. | |
25c7f41e | 3328 | */ |
5eba8ab3 | 3329 | cifs_sb->rsize = pvolume_info->rsize; |
25c7f41e PS |
3330 | cifs_sb->wsize = pvolume_info->wsize; |
3331 | ||
3b795210 SF |
3332 | cifs_sb->mnt_uid = pvolume_info->linux_uid; |
3333 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
3334 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
3335 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
5206efd6 | 3336 | cFYI(1, "file mode: 0x%hx dir mode: 0x%hx", |
b6b38f70 | 3337 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); |
3b795210 | 3338 | |
6d20e840 | 3339 | cifs_sb->actimeo = pvolume_info->actimeo; |
724d9f1c | 3340 | cifs_sb->local_nls = pvolume_info->local_nls; |
6d20e840 | 3341 | |
3b795210 SF |
3342 | if (pvolume_info->noperm) |
3343 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
3344 | if (pvolume_info->setuids) | |
3345 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
3346 | if (pvolume_info->server_ino) | |
3347 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
3348 | if (pvolume_info->remap) | |
3349 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; | |
3350 | if (pvolume_info->no_xattr) | |
3351 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
3352 | if (pvolume_info->sfu_emul) | |
3353 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
3354 | if (pvolume_info->nobrl) | |
3355 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 3356 | if (pvolume_info->nostrictsync) |
4717bed6 | 3357 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
3358 | if (pvolume_info->mand_lock) |
3359 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
d4ffff1f PS |
3360 | if (pvolume_info->rwpidforward) |
3361 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; | |
3b795210 SF |
3362 | if (pvolume_info->cifs_acl) |
3363 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
3c7c87fd | 3364 | if (pvolume_info->backupuid_specified) { |
3d3ea8e6 | 3365 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; |
3c7c87fd SP |
3366 | cifs_sb->mnt_backupuid = pvolume_info->backupuid; |
3367 | } | |
3368 | if (pvolume_info->backupgid_specified) { | |
3d3ea8e6 | 3369 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; |
3c7c87fd SP |
3370 | cifs_sb->mnt_backupgid = pvolume_info->backupgid; |
3371 | } | |
3b795210 SF |
3372 | if (pvolume_info->override_uid) |
3373 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
3374 | if (pvolume_info->override_gid) | |
3375 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
3376 | if (pvolume_info->dynperm) | |
3377 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
3378 | if (pvolume_info->fsc) |
3379 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
3380 | if (pvolume_info->multiuser) |
3381 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
3382 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
3383 | if (pvolume_info->strict_io) |
3384 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 3385 | if (pvolume_info->direct_io) { |
b6b38f70 | 3386 | cFYI(1, "mounting share using direct i/o"); |
3b795210 SF |
3387 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
3388 | } | |
736a3320 SM |
3389 | if (pvolume_info->mfsymlinks) { |
3390 | if (pvolume_info->sfu_emul) { | |
3391 | cERROR(1, "mount option mfsymlinks ignored if sfu " | |
3392 | "mount option is used"); | |
3393 | } else { | |
3394 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; | |
3395 | } | |
3396 | } | |
3b795210 SF |
3397 | |
3398 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
b6b38f70 JP |
3399 | cERROR(1, "mount option dynperm ignored if cifsacl " |
3400 | "mount option supported"); | |
b1c8d2b4 JL |
3401 | } |
3402 | ||
f7910cbd | 3403 | /* |
5eba8ab3 JL |
3404 | * When the server supports very large reads and writes via POSIX extensions, |
3405 | * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not | |
3406 | * including the RFC1001 length. | |
f7910cbd JL |
3407 | * |
3408 | * Note that this might make for "interesting" allocation problems during | |
1190f6a0 JL |
3409 | * writeback however as we have to allocate an array of pointers for the |
3410 | * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096. | |
5eba8ab3 JL |
3411 | * |
3412 | * For reads, there is a similar problem as we need to allocate an array | |
3413 | * of kvecs to handle the receive, though that should only need to be done | |
3414 | * once. | |
f7910cbd | 3415 | */ |
1190f6a0 | 3416 | #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) |
5eba8ab3 | 3417 | #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4) |
f7910cbd JL |
3418 | |
3419 | /* | |
5eba8ab3 JL |
3420 | * When the server doesn't allow large posix writes, only allow a rsize/wsize |
3421 | * of 2^17-1 minus the size of the call header. That allows for a read or | |
3422 | * write up to the maximum size described by RFC1002. | |
f7910cbd | 3423 | */ |
94443f43 | 3424 | #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4) |
5eba8ab3 | 3425 | #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4) |
f7910cbd JL |
3426 | |
3427 | /* | |
3428 | * The default wsize is 1M. find_get_pages seems to return a maximum of 256 | |
3429 | * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill | |
3430 | * a single wsize request with a single call. | |
3431 | */ | |
5eba8ab3 JL |
3432 | #define CIFS_DEFAULT_IOSIZE (1024 * 1024) |
3433 | ||
3434 | /* | |
ce91acb3 JL |
3435 | * Windows only supports a max of 60kb reads and 65535 byte writes. Default to |
3436 | * those values when posix extensions aren't in force. In actuality here, we | |
3437 | * use 65536 to allow for a write that is a multiple of 4k. Most servers seem | |
3438 | * to be ok with the extra byte even though Windows doesn't send writes that | |
3439 | * are that large. | |
3440 | * | |
3441 | * Citation: | |
3442 | * | |
3443 | * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx | |
5eba8ab3 JL |
3444 | */ |
3445 | #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024) | |
ce91acb3 | 3446 | #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536) |
f7910cbd JL |
3447 | |
3448 | static unsigned int | |
96daf2b0 | 3449 | cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info) |
f7910cbd JL |
3450 | { |
3451 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
3452 | struct TCP_Server_Info *server = tcon->ses->server; | |
ce91acb3 JL |
3453 | unsigned int wsize; |
3454 | ||
3455 | /* start with specified wsize, or default */ | |
3456 | if (pvolume_info->wsize) | |
3457 | wsize = pvolume_info->wsize; | |
3458 | else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) | |
3459 | wsize = CIFS_DEFAULT_IOSIZE; | |
3460 | else | |
3461 | wsize = CIFS_DEFAULT_NON_POSIX_WSIZE; | |
f7910cbd JL |
3462 | |
3463 | /* can server support 24-bit write sizes? (via UNIX extensions) */ | |
3464 | if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) | |
1190f6a0 | 3465 | wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE); |
f7910cbd | 3466 | |
1190f6a0 JL |
3467 | /* |
3468 | * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set? | |
3469 | * Limit it to max buffer offered by the server, minus the size of the | |
3470 | * WRITEX header, not including the 4 byte RFC1001 length. | |
3471 | */ | |
3472 | if (!(server->capabilities & CAP_LARGE_WRITE_X) || | |
3473 | (!(server->capabilities & CAP_UNIX) && | |
3474 | (server->sec_mode & (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)))) | |
3475 | wsize = min_t(unsigned int, wsize, | |
3476 | server->maxBuf - sizeof(WRITE_REQ) + 4); | |
f7910cbd JL |
3477 | |
3478 | /* hard limit of CIFS_MAX_WSIZE */ | |
3479 | wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE); | |
3480 | ||
3481 | return wsize; | |
3482 | } | |
3483 | ||
5eba8ab3 JL |
3484 | static unsigned int |
3485 | cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info) | |
3486 | { | |
3487 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
3488 | struct TCP_Server_Info *server = tcon->ses->server; | |
3489 | unsigned int rsize, defsize; | |
3490 | ||
3491 | /* | |
3492 | * Set default value... | |
3493 | * | |
3494 | * HACK alert! Ancient servers have very small buffers. Even though | |
3495 | * MS-CIFS indicates that servers are only limited by the client's | |
3496 | * bufsize for reads, testing against win98se shows that it throws | |
3497 | * INVALID_PARAMETER errors if you try to request too large a read. | |
ec01d738 | 3498 | * OS/2 just sends back short reads. |
5eba8ab3 | 3499 | * |
ec01d738 JL |
3500 | * If the server doesn't advertise CAP_LARGE_READ_X, then assume that |
3501 | * it can't handle a read request larger than its MaxBufferSize either. | |
5eba8ab3 JL |
3502 | */ |
3503 | if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP)) | |
3504 | defsize = CIFS_DEFAULT_IOSIZE; | |
3505 | else if (server->capabilities & CAP_LARGE_READ_X) | |
3506 | defsize = CIFS_DEFAULT_NON_POSIX_RSIZE; | |
5eba8ab3 JL |
3507 | else |
3508 | defsize = server->maxBuf - sizeof(READ_RSP); | |
3509 | ||
3510 | rsize = pvolume_info->rsize ? pvolume_info->rsize : defsize; | |
3511 | ||
3512 | /* | |
3513 | * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to | |
3514 | * the client's MaxBufferSize. | |
3515 | */ | |
3516 | if (!(server->capabilities & CAP_LARGE_READ_X)) | |
3517 | rsize = min_t(unsigned int, CIFSMaxBufSize, rsize); | |
3518 | ||
3519 | /* hard limit of CIFS_MAX_RSIZE */ | |
3520 | rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE); | |
3521 | ||
3522 | return rsize; | |
3523 | } | |
3524 | ||
e4cce94c | 3525 | static int |
96daf2b0 | 3526 | is_path_accessible(int xid, struct cifs_tcon *tcon, |
e4cce94c IM |
3527 | struct cifs_sb_info *cifs_sb, const char *full_path) |
3528 | { | |
3529 | int rc; | |
e4cce94c IM |
3530 | FILE_ALL_INFO *pfile_info; |
3531 | ||
e4cce94c IM |
3532 | pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
3533 | if (pfile_info == NULL) | |
3534 | return -ENOMEM; | |
3535 | ||
3536 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info, | |
3537 | 0 /* not legacy */, cifs_sb->local_nls, | |
3538 | cifs_sb->mnt_cifs_flags & | |
3539 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
221d1d79 JL |
3540 | |
3541 | if (rc == -EOPNOTSUPP || rc == -EINVAL) | |
3542 | rc = SMBQueryInformation(xid, tcon, full_path, pfile_info, | |
3543 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
3544 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
e4cce94c IM |
3545 | kfree(pfile_info); |
3546 | return rc; | |
3547 | } | |
3548 | ||
b9bce2e9 JL |
3549 | static void |
3550 | cleanup_volume_info_contents(struct smb_vol *volume_info) | |
1bfe73c2 | 3551 | { |
b946845a | 3552 | kfree(volume_info->username); |
1bfe73c2 | 3553 | kzfree(volume_info->password); |
13589c43 SF |
3554 | if (volume_info->UNCip != volume_info->UNC + 2) |
3555 | kfree(volume_info->UNCip); | |
95c75454 | 3556 | kfree(volume_info->UNC); |
b946845a SF |
3557 | kfree(volume_info->domainname); |
3558 | kfree(volume_info->iocharset); | |
1bfe73c2 | 3559 | kfree(volume_info->prepath); |
b9bce2e9 JL |
3560 | } |
3561 | ||
3562 | void | |
3563 | cifs_cleanup_volume_info(struct smb_vol *volume_info) | |
3564 | { | |
3565 | if (!volume_info) | |
3566 | return; | |
3567 | cleanup_volume_info_contents(volume_info); | |
1bfe73c2 | 3568 | kfree(volume_info); |
1bfe73c2 IM |
3569 | } |
3570 | ||
b9bce2e9 | 3571 | |
2d6d589d | 3572 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1bfe73c2 IM |
3573 | /* build_path_to_root returns full path to root when |
3574 | * we do not have an exiting connection (tcon) */ | |
3575 | static char * | |
b2a0fa15 | 3576 | build_unc_path_to_root(const struct smb_vol *vol, |
1bfe73c2 IM |
3577 | const struct cifs_sb_info *cifs_sb) |
3578 | { | |
b2a0fa15 JL |
3579 | char *full_path, *pos; |
3580 | unsigned int pplen = vol->prepath ? strlen(vol->prepath) : 0; | |
3581 | unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); | |
1bfe73c2 | 3582 | |
b2a0fa15 | 3583 | full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); |
1bfe73c2 IM |
3584 | if (full_path == NULL) |
3585 | return ERR_PTR(-ENOMEM); | |
3586 | ||
b2a0fa15 JL |
3587 | strncpy(full_path, vol->UNC, unc_len); |
3588 | pos = full_path + unc_len; | |
3589 | ||
3590 | if (pplen) { | |
3591 | strncpy(pos, vol->prepath, pplen); | |
3592 | pos += pplen; | |
3593 | } | |
3594 | ||
3595 | *pos = '\0'; /* add trailing null */ | |
f87d39d9 | 3596 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
b2a0fa15 | 3597 | cFYI(1, "%s: full_path=%s", __func__, full_path); |
1bfe73c2 IM |
3598 | return full_path; |
3599 | } | |
dd613945 SF |
3600 | |
3601 | /* | |
3602 | * Perform a dfs referral query for a share and (optionally) prefix | |
3603 | * | |
046462ab SF |
3604 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
3605 | * to a string containing updated options for the submount. Otherwise it | |
3606 | * will be left untouched. | |
dd613945 SF |
3607 | * |
3608 | * Returns the rc from get_dfs_path to the caller, which can be used to | |
3609 | * determine whether there were referrals. | |
3610 | */ | |
3611 | static int | |
96daf2b0 | 3612 | expand_dfs_referral(int xid, struct cifs_ses *pSesInfo, |
dd613945 | 3613 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, |
046462ab | 3614 | int check_prefix) |
dd613945 SF |
3615 | { |
3616 | int rc; | |
3617 | unsigned int num_referrals = 0; | |
3618 | struct dfs_info3_param *referrals = NULL; | |
3619 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; | |
3620 | ||
3621 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
3622 | if (IS_ERR(full_path)) | |
3623 | return PTR_ERR(full_path); | |
3624 | ||
3625 | /* For DFS paths, skip the first '\' of the UNC */ | |
3626 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; | |
3627 | ||
3628 | rc = get_dfs_path(xid, pSesInfo , ref_path, cifs_sb->local_nls, | |
3629 | &num_referrals, &referrals, | |
3630 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3631 | ||
3632 | if (!rc && num_referrals > 0) { | |
3633 | char *fake_devname = NULL; | |
3634 | ||
3635 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, | |
3636 | full_path + 1, referrals, | |
3637 | &fake_devname); | |
3638 | ||
3639 | free_dfs_info_array(referrals, num_referrals); | |
046462ab | 3640 | |
dd613945 SF |
3641 | if (IS_ERR(mdata)) { |
3642 | rc = PTR_ERR(mdata); | |
3643 | mdata = NULL; | |
b9bce2e9 JL |
3644 | } else { |
3645 | cleanup_volume_info_contents(volume_info); | |
3646 | memset(volume_info, '\0', sizeof(*volume_info)); | |
3647 | rc = cifs_setup_volume_info(volume_info, mdata, | |
3648 | fake_devname); | |
dd613945 | 3649 | } |
b9bce2e9 JL |
3650 | kfree(fake_devname); |
3651 | kfree(cifs_sb->mountdata); | |
046462ab | 3652 | cifs_sb->mountdata = mdata; |
dd613945 SF |
3653 | } |
3654 | kfree(full_path); | |
3655 | return rc; | |
3656 | } | |
2d6d589d | 3657 | #endif |
1bfe73c2 | 3658 | |
04db79b0 JL |
3659 | static int |
3660 | cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, | |
3661 | const char *devname) | |
1da177e4 | 3662 | { |
724d9f1c | 3663 | int rc = 0; |
1da177e4 | 3664 | |
04db79b0 JL |
3665 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) |
3666 | return -EINVAL; | |
1da177e4 | 3667 | |
23db65f5 | 3668 | |
7586b765 | 3669 | if (volume_info->nullauth) { |
04febabc JL |
3670 | cFYI(1, "Anonymous login"); |
3671 | kfree(volume_info->username); | |
3672 | volume_info->username = NULL; | |
7586b765 | 3673 | } else if (volume_info->username) { |
1da177e4 | 3674 | /* BB fixme parse for domain name here */ |
b6b38f70 | 3675 | cFYI(1, "Username: %s", volume_info->username); |
1da177e4 | 3676 | } else { |
bf820679 | 3677 | cifserror("No username specified"); |
50c2f753 SF |
3678 | /* In userspace mount helper we can get user name from alternate |
3679 | locations such as env variables and files on disk */ | |
04db79b0 | 3680 | return -EINVAL; |
1da177e4 LT |
3681 | } |
3682 | ||
1da177e4 | 3683 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 3684 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
3685 | /* load_nls_default cannot return null */ |
3686 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 3687 | } else { |
a5fc4ce0 JL |
3688 | volume_info->local_nls = load_nls(volume_info->iocharset); |
3689 | if (volume_info->local_nls == NULL) { | |
b6b38f70 JP |
3690 | cERROR(1, "CIFS mount error: iocharset %s not found", |
3691 | volume_info->iocharset); | |
04db79b0 | 3692 | return -ELIBACC; |
1da177e4 LT |
3693 | } |
3694 | } | |
724d9f1c | 3695 | |
724d9f1c PS |
3696 | return rc; |
3697 | } | |
3698 | ||
04db79b0 JL |
3699 | struct smb_vol * |
3700 | cifs_get_volume_info(char *mount_data, const char *devname) | |
3701 | { | |
3702 | int rc; | |
3703 | struct smb_vol *volume_info; | |
3704 | ||
3705 | volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL); | |
3706 | if (!volume_info) | |
3707 | return ERR_PTR(-ENOMEM); | |
3708 | ||
3709 | rc = cifs_setup_volume_info(volume_info, mount_data, devname); | |
3710 | if (rc) { | |
3711 | cifs_cleanup_volume_info(volume_info); | |
3712 | volume_info = ERR_PTR(rc); | |
3713 | } | |
3714 | ||
3715 | return volume_info; | |
3716 | } | |
3717 | ||
724d9f1c | 3718 | int |
2c6292ae | 3719 | cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) |
724d9f1c | 3720 | { |
1daaae8f | 3721 | int rc; |
724d9f1c | 3722 | int xid; |
96daf2b0 SF |
3723 | struct cifs_ses *pSesInfo; |
3724 | struct cifs_tcon *tcon; | |
724d9f1c PS |
3725 | struct TCP_Server_Info *srvTcp; |
3726 | char *full_path; | |
3727 | struct tcon_link *tlink; | |
3728 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
3729 | int referral_walks_count = 0; | |
20547490 | 3730 | #endif |
dd854466 AV |
3731 | |
3732 | rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); | |
3733 | if (rc) | |
3734 | return rc; | |
3735 | ||
20547490 | 3736 | #ifdef CONFIG_CIFS_DFS_UPCALL |
724d9f1c PS |
3737 | try_mount_again: |
3738 | /* cleanup activities if we're chasing a referral */ | |
3739 | if (referral_walks_count) { | |
3740 | if (tcon) | |
3741 | cifs_put_tcon(tcon); | |
3742 | else if (pSesInfo) | |
3743 | cifs_put_smb_ses(pSesInfo); | |
3744 | ||
724d9f1c PS |
3745 | FreeXid(xid); |
3746 | } | |
3747 | #endif | |
1daaae8f | 3748 | rc = 0; |
724d9f1c PS |
3749 | tcon = NULL; |
3750 | pSesInfo = NULL; | |
3751 | srvTcp = NULL; | |
3752 | full_path = NULL; | |
3753 | tlink = NULL; | |
3754 | ||
3755 | xid = GetXid(); | |
1da177e4 | 3756 | |
63c038c2 | 3757 | /* get a reference to a tcp session */ |
7586b765 | 3758 | srvTcp = cifs_get_tcp_session(volume_info); |
63c038c2 JL |
3759 | if (IS_ERR(srvTcp)) { |
3760 | rc = PTR_ERR(srvTcp); | |
dd854466 | 3761 | bdi_destroy(&cifs_sb->bdi); |
63c038c2 | 3762 | goto out; |
1da177e4 LT |
3763 | } |
3764 | ||
36988c76 JL |
3765 | /* get a reference to a SMB session */ |
3766 | pSesInfo = cifs_get_smb_ses(srvTcp, volume_info); | |
3767 | if (IS_ERR(pSesInfo)) { | |
3768 | rc = PTR_ERR(pSesInfo); | |
3769 | pSesInfo = NULL; | |
3770 | goto mount_fail_check; | |
1da177e4 | 3771 | } |
50c2f753 | 3772 | |
d00c28de JL |
3773 | /* search for existing tcon to this server share */ |
3774 | tcon = cifs_get_tcon(pSesInfo, volume_info); | |
3775 | if (IS_ERR(tcon)) { | |
3776 | rc = PTR_ERR(tcon); | |
3777 | tcon = NULL; | |
1bfe73c2 | 3778 | goto remote_path_check; |
d00c28de | 3779 | } |
1bfe73c2 | 3780 | |
d82c2df5 | 3781 | /* tell server which Unix caps we support */ |
6848b733 | 3782 | if (tcon->ses->capabilities & CAP_UNIX) { |
d82c2df5 SF |
3783 | /* reset of caps checks mount to see if unix extensions |
3784 | disabled for just this mount */ | |
2c6292ae | 3785 | reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info); |
6848b733 SF |
3786 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && |
3787 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & | |
3788 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) { | |
3789 | rc = -EACCES; | |
3790 | goto mount_fail_check; | |
3791 | } | |
3792 | } else | |
d82c2df5 | 3793 | tcon->unix_ext = 0; /* server does not support them */ |
c18c842b | 3794 | |
6848b733 SF |
3795 | /* do not care if following two calls succeed - informational */ |
3796 | if (!tcon->ipc) { | |
3797 | CIFSSMBQFSDeviceInfo(xid, tcon); | |
3798 | CIFSSMBQFSAttributeInfo(xid, tcon); | |
3799 | } | |
3800 | ||
f7910cbd | 3801 | cifs_sb->wsize = cifs_negotiate_wsize(tcon, volume_info); |
5eba8ab3 | 3802 | cifs_sb->rsize = cifs_negotiate_rsize(tcon, volume_info); |
f7910cbd | 3803 | |
66bfaadc | 3804 | /* tune readahead according to rsize */ |
8f71465c | 3805 | cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE; |
f7910cbd | 3806 | |
1bfe73c2 | 3807 | remote_path_check: |
c1508ca2 SF |
3808 | #ifdef CONFIG_CIFS_DFS_UPCALL |
3809 | /* | |
3810 | * Perform an unconditional check for whether there are DFS | |
3811 | * referrals for this path without prefix, to provide support | |
3812 | * for DFS referrals from w2k8 servers which don't seem to respond | |
3813 | * with PATH_NOT_COVERED to requests that include the prefix. | |
3814 | * Chase the referral if found, otherwise continue normally. | |
3815 | */ | |
3816 | if (referral_walks_count == 0) { | |
3817 | int refrc = expand_dfs_referral(xid, pSesInfo, volume_info, | |
046462ab | 3818 | cifs_sb, false); |
c1508ca2 SF |
3819 | if (!refrc) { |
3820 | referral_walks_count++; | |
3821 | goto try_mount_again; | |
3822 | } | |
3823 | } | |
3824 | #endif | |
3825 | ||
f87d39d9 | 3826 | /* check if a whole path is not remote */ |
70945643 | 3827 | if (!rc && tcon) { |
e4cce94c | 3828 | /* build_path_to_root works only when we have a valid tcon */ |
f87d39d9 | 3829 | full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon); |
e4cce94c IM |
3830 | if (full_path == NULL) { |
3831 | rc = -ENOMEM; | |
3832 | goto mount_fail_check; | |
3833 | } | |
3834 | rc = is_path_accessible(xid, tcon, cifs_sb, full_path); | |
03ceace5 | 3835 | if (rc != 0 && rc != -EREMOTE) { |
e4cce94c IM |
3836 | kfree(full_path); |
3837 | goto mount_fail_check; | |
3838 | } | |
3839 | kfree(full_path); | |
3840 | } | |
3841 | ||
1bfe73c2 IM |
3842 | /* get referral if needed */ |
3843 | if (rc == -EREMOTE) { | |
d036f50f | 3844 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
3845 | if (referral_walks_count > MAX_NESTED_LINKS) { |
3846 | /* | |
3847 | * BB: when we implement proper loop detection, | |
3848 | * we will remove this check. But now we need it | |
3849 | * to prevent an indefinite loop if 'DFS tree' is | |
3850 | * misconfigured (i.e. has loops). | |
3851 | */ | |
3852 | rc = -ELOOP; | |
3853 | goto mount_fail_check; | |
3854 | } | |
1bfe73c2 | 3855 | |
dd613945 | 3856 | rc = expand_dfs_referral(xid, pSesInfo, volume_info, cifs_sb, |
046462ab | 3857 | true); |
7b91e266 | 3858 | |
dd613945 | 3859 | if (!rc) { |
5c2503a8 | 3860 | referral_walks_count++; |
1bfe73c2 IM |
3861 | goto try_mount_again; |
3862 | } | |
dd613945 | 3863 | goto mount_fail_check; |
d036f50f SF |
3864 | #else /* No DFS support, return error on mount */ |
3865 | rc = -EOPNOTSUPP; | |
3866 | #endif | |
1bfe73c2 IM |
3867 | } |
3868 | ||
9d002df4 JL |
3869 | if (rc) |
3870 | goto mount_fail_check; | |
3871 | ||
3872 | /* now, hang the tcon off of the superblock */ | |
3873 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); | |
3874 | if (tlink == NULL) { | |
3875 | rc = -ENOMEM; | |
3876 | goto mount_fail_check; | |
3877 | } | |
3878 | ||
b647c35f | 3879 | tlink->tl_uid = pSesInfo->linux_uid; |
9d002df4 JL |
3880 | tlink->tl_tcon = tcon; |
3881 | tlink->tl_time = jiffies; | |
3882 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
3883 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
3884 | ||
b647c35f | 3885 | cifs_sb->master_tlink = tlink; |
9d002df4 | 3886 | spin_lock(&cifs_sb->tlink_tree_lock); |
b647c35f | 3887 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
9d002df4 | 3888 | spin_unlock(&cifs_sb->tlink_tree_lock); |
413e661c | 3889 | |
da472fc8 | 3890 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
3891 | TLINK_IDLE_EXPIRE); |
3892 | ||
1bfe73c2 IM |
3893 | mount_fail_check: |
3894 | /* on error free sesinfo and tcon struct if needed */ | |
3895 | if (rc) { | |
1bfe73c2 | 3896 | /* If find_unc succeeded then rc == 0 so we can not end */ |
25985edc | 3897 | /* up accidentally freeing someone elses tcon struct */ |
1bfe73c2 IM |
3898 | if (tcon) |
3899 | cifs_put_tcon(tcon); | |
3900 | else if (pSesInfo) | |
3901 | cifs_put_smb_ses(pSesInfo); | |
3902 | else | |
3903 | cifs_put_tcp_session(srvTcp); | |
dd854466 | 3904 | bdi_destroy(&cifs_sb->bdi); |
1bfe73c2 IM |
3905 | } |
3906 | ||
70fe7dc0 | 3907 | out: |
1da177e4 LT |
3908 | FreeXid(xid); |
3909 | return rc; | |
3910 | } | |
3911 | ||
8d1bca32 JL |
3912 | /* |
3913 | * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon | |
3914 | * pointer may be NULL. | |
3915 | */ | |
1da177e4 | 3916 | int |
96daf2b0 SF |
3917 | CIFSTCon(unsigned int xid, struct cifs_ses *ses, |
3918 | const char *tree, struct cifs_tcon *tcon, | |
1da177e4 LT |
3919 | const struct nls_table *nls_codepage) |
3920 | { | |
3921 | struct smb_hdr *smb_buffer; | |
3922 | struct smb_hdr *smb_buffer_response; | |
3923 | TCONX_REQ *pSMB; | |
3924 | TCONX_RSP *pSMBr; | |
3925 | unsigned char *bcc_ptr; | |
3926 | int rc = 0; | |
690c522f JL |
3927 | int length; |
3928 | __u16 bytes_left, count; | |
1da177e4 LT |
3929 | |
3930 | if (ses == NULL) | |
3931 | return -EIO; | |
3932 | ||
3933 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 3934 | if (smb_buffer == NULL) |
1da177e4 | 3935 | return -ENOMEM; |
ca43e3be | 3936 | |
1da177e4 LT |
3937 | smb_buffer_response = smb_buffer; |
3938 | ||
3939 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
3940 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 | 3941 | |
88257360 | 3942 | smb_buffer->Mid = get_next_mid(ses->server); |
1da177e4 LT |
3943 | smb_buffer->Uid = ses->Suid; |
3944 | pSMB = (TCONX_REQ *) smb_buffer; | |
3945 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
3946 | ||
3947 | pSMB->AndXCommand = 0xFF; | |
3948 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 3949 | bcc_ptr = &pSMB->Password[0]; |
8d1bca32 | 3950 | if (!tcon || (ses->server->sec_mode & SECMODE_USER)) { |
eeac8047 | 3951 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 3952 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 3953 | bcc_ptr++; /* skip password */ |
7c7b25bc | 3954 | /* already aligned so no need to do it below */ |
eeac8047 | 3955 | } else { |
540b2e37 | 3956 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
3957 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
3958 | specified as required (when that support is added to | |
3959 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 3960 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
3961 | by Samba (not sure whether other servers allow |
3962 | NTLMv2 password here) */ | |
7c7b25bc | 3963 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 3964 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
00e485b0 | 3965 | (ses->server->secType == LANMAN)) |
d3ba50b1 | 3966 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
96daf2b0 | 3967 | ses->server->sec_mode & |
4e53a3fb JL |
3968 | SECMODE_PW_ENCRYPT ? true : false, |
3969 | bcc_ptr); | |
7c7b25bc SF |
3970 | else |
3971 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 | 3972 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
9ef5992e | 3973 | bcc_ptr, nls_codepage); |
eeac8047 | 3974 | |
540b2e37 | 3975 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 3976 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
3977 | /* must align unicode strings */ |
3978 | *bcc_ptr = 0; /* null byte password */ | |
3979 | bcc_ptr++; | |
3980 | } | |
eeac8047 | 3981 | } |
1da177e4 | 3982 | |
96daf2b0 | 3983 | if (ses->server->sec_mode & |
a878fb22 | 3984 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
1da177e4 LT |
3985 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
3986 | ||
3987 | if (ses->capabilities & CAP_STATUS32) { | |
3988 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
3989 | } | |
3990 | if (ses->capabilities & CAP_DFS) { | |
3991 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
3992 | } | |
3993 | if (ses->capabilities & CAP_UNICODE) { | |
3994 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
3995 | length = | |
acbbb76a | 3996 | cifs_strtoUTF16((__le16 *) bcc_ptr, tree, |
50c2f753 | 3997 | 6 /* max utf8 char length in bytes */ * |
a878fb22 SF |
3998 | (/* server len*/ + 256 /* share len */), nls_codepage); |
3999 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
4000 | bcc_ptr += 2; /* skip trailing null */ |
4001 | } else { /* ASCII */ | |
1da177e4 LT |
4002 | strcpy(bcc_ptr, tree); |
4003 | bcc_ptr += strlen(tree) + 1; | |
4004 | } | |
4005 | strcpy(bcc_ptr, "?????"); | |
4006 | bcc_ptr += strlen("?????"); | |
4007 | bcc_ptr += 1; | |
4008 | count = bcc_ptr - &pSMB->Password[0]; | |
be8e3b00 SF |
4009 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
4010 | pSMB->hdr.smb_buf_length) + count); | |
1da177e4 LT |
4011 | pSMB->ByteCount = cpu_to_le16(count); |
4012 | ||
133672ef | 4013 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 4014 | 0); |
1da177e4 | 4015 | |
1da177e4 LT |
4016 | /* above now done in SendReceive */ |
4017 | if ((rc == 0) && (tcon != NULL)) { | |
0e0d2cf3 SF |
4018 | bool is_unicode; |
4019 | ||
1da177e4 | 4020 | tcon->tidStatus = CifsGood; |
3b795210 | 4021 | tcon->need_reconnect = false; |
1da177e4 LT |
4022 | tcon->tid = smb_buffer_response->Tid; |
4023 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 4024 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 4025 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
4026 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
4027 | is_unicode = true; | |
4028 | else | |
4029 | is_unicode = false; | |
4030 | ||
cc20c031 | 4031 | |
50c2f753 | 4032 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
4033 | if (length == 3) { |
4034 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
4035 | (bcc_ptr[2] == 'C')) { | |
b6b38f70 | 4036 | cFYI(1, "IPC connection"); |
7f8ed420 SF |
4037 | tcon->ipc = 1; |
4038 | } | |
4039 | } else if (length == 2) { | |
4040 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
4041 | /* the most common case */ | |
b6b38f70 | 4042 | cFYI(1, "disk share connection"); |
7f8ed420 SF |
4043 | } |
4044 | } | |
50c2f753 | 4045 | bcc_ptr += length + 1; |
cc20c031 | 4046 | bytes_left -= (length + 1); |
1da177e4 | 4047 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); |
cc20c031 JL |
4048 | |
4049 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 4050 | kfree(tcon->nativeFileSystem); |
acbbb76a | 4051 | tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr, |
0e0d2cf3 | 4052 | bytes_left, is_unicode, |
cc20c031 JL |
4053 | nls_codepage); |
4054 | ||
b6b38f70 | 4055 | cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem); |
cc20c031 | 4056 | |
fb8c4b14 | 4057 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
4058 | (smb_buffer_response->WordCount == 7)) |
4059 | /* field is in same location */ | |
3979877e SF |
4060 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
4061 | else | |
4062 | tcon->Flags = 0; | |
b6b38f70 | 4063 | cFYI(1, "Tcon flags: 0x%x ", tcon->Flags); |
1da177e4 | 4064 | } else if ((rc == 0) && tcon == NULL) { |
50c2f753 | 4065 | /* all we need to save for IPC$ connection */ |
1da177e4 LT |
4066 | ses->ipc_tid = smb_buffer_response->Tid; |
4067 | } | |
4068 | ||
a8a11d39 | 4069 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
4070 | return rc; |
4071 | } | |
4072 | ||
2a9b9951 AV |
4073 | void |
4074 | cifs_umount(struct cifs_sb_info *cifs_sb) | |
1da177e4 | 4075 | { |
b647c35f JL |
4076 | struct rb_root *root = &cifs_sb->tlink_tree; |
4077 | struct rb_node *node; | |
4078 | struct tcon_link *tlink; | |
9d002df4 | 4079 | |
2de970ff JL |
4080 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
4081 | ||
b647c35f JL |
4082 | spin_lock(&cifs_sb->tlink_tree_lock); |
4083 | while ((node = rb_first(root))) { | |
4084 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
4085 | cifs_get_tlink(tlink); | |
4086 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4087 | rb_erase(node, root); | |
1da177e4 | 4088 | |
b647c35f JL |
4089 | spin_unlock(&cifs_sb->tlink_tree_lock); |
4090 | cifs_put_tlink(tlink); | |
4091 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4092 | } | |
4093 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 4094 | |
dd854466 | 4095 | bdi_destroy(&cifs_sb->bdi); |
d757d71b AV |
4096 | kfree(cifs_sb->mountdata); |
4097 | unload_nls(cifs_sb->local_nls); | |
4098 | kfree(cifs_sb); | |
50c2f753 | 4099 | } |
1da177e4 | 4100 | |
96daf2b0 | 4101 | int cifs_negotiate_protocol(unsigned int xid, struct cifs_ses *ses) |
1da177e4 LT |
4102 | { |
4103 | int rc = 0; | |
198b5682 | 4104 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 4105 | |
198b5682 JL |
4106 | /* only send once per connect */ |
4107 | if (server->maxBuf != 0) | |
4108 | return 0; | |
4109 | ||
45275789 | 4110 | set_credits(server, 1); |
198b5682 JL |
4111 | rc = CIFSSMBNegotiate(xid, ses); |
4112 | if (rc == -EAGAIN) { | |
4113 | /* retry only once on 1st time connection */ | |
45275789 | 4114 | set_credits(server, 1); |
198b5682 JL |
4115 | rc = CIFSSMBNegotiate(xid, ses); |
4116 | if (rc == -EAGAIN) | |
4117 | rc = -EHOSTDOWN; | |
1da177e4 | 4118 | } |
198b5682 JL |
4119 | if (rc == 0) { |
4120 | spin_lock(&GlobalMid_Lock); | |
7fdbaa1b | 4121 | if (server->tcpStatus == CifsNeedNegotiate) |
198b5682 JL |
4122 | server->tcpStatus = CifsGood; |
4123 | else | |
4124 | rc = -EHOSTDOWN; | |
4125 | spin_unlock(&GlobalMid_Lock); | |
26b994fa | 4126 | |
198b5682 JL |
4127 | } |
4128 | ||
4129 | return rc; | |
4130 | } | |
4131 | ||
4132 | ||
96daf2b0 | 4133 | int cifs_setup_session(unsigned int xid, struct cifs_ses *ses, |
198b5682 JL |
4134 | struct nls_table *nls_info) |
4135 | { | |
4136 | int rc = 0; | |
4137 | struct TCP_Server_Info *server = ses->server; | |
26b994fa | 4138 | |
198b5682 JL |
4139 | ses->flags = 0; |
4140 | ses->capabilities = server->capabilities; | |
26b994fa | 4141 | if (linuxExtEnabled == 0) |
198b5682 | 4142 | ses->capabilities &= (~CAP_UNIX); |
20418acd | 4143 | |
b6b38f70 | 4144 | cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d", |
96daf2b0 | 4145 | server->sec_mode, server->capabilities, server->timeAdj); |
cb7691b6 | 4146 | |
198b5682 | 4147 | rc = CIFS_SessSetup(xid, ses, nls_info); |
26b994fa | 4148 | if (rc) { |
b6b38f70 | 4149 | cERROR(1, "Send error in SessSetup = %d", rc); |
26b994fa | 4150 | } else { |
5d0d2882 SP |
4151 | mutex_lock(&ses->server->srv_mutex); |
4152 | if (!server->session_estab) { | |
21e73393 | 4153 | server->session_key.response = ses->auth_key.response; |
5d0d2882 | 4154 | server->session_key.len = ses->auth_key.len; |
21e73393 SP |
4155 | server->sequence_number = 0x2; |
4156 | server->session_estab = true; | |
4157 | ses->auth_key.response = NULL; | |
5d0d2882 SP |
4158 | } |
4159 | mutex_unlock(&server->srv_mutex); | |
4160 | ||
b6b38f70 | 4161 | cFYI(1, "CIFS Session Established successfully"); |
20418acd | 4162 | spin_lock(&GlobalMid_Lock); |
198b5682 JL |
4163 | ses->status = CifsGood; |
4164 | ses->need_reconnect = false; | |
20418acd | 4165 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 4166 | } |
26b994fa | 4167 | |
21e73393 SP |
4168 | kfree(ses->auth_key.response); |
4169 | ses->auth_key.response = NULL; | |
4170 | ses->auth_key.len = 0; | |
d3686d54 SP |
4171 | kfree(ses->ntlmssp); |
4172 | ses->ntlmssp = NULL; | |
21e73393 | 4173 | |
1da177e4 LT |
4174 | return rc; |
4175 | } | |
4176 | ||
8a8798a5 JL |
4177 | static int |
4178 | cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses) | |
4179 | { | |
4180 | switch (ses->server->secType) { | |
4181 | case Kerberos: | |
4182 | vol->secFlg = CIFSSEC_MUST_KRB5; | |
4183 | return 0; | |
4184 | case NTLMv2: | |
4185 | vol->secFlg = CIFSSEC_MUST_NTLMV2; | |
4186 | break; | |
4187 | case NTLM: | |
4188 | vol->secFlg = CIFSSEC_MUST_NTLM; | |
4189 | break; | |
4190 | case RawNTLMSSP: | |
4191 | vol->secFlg = CIFSSEC_MUST_NTLMSSP; | |
4192 | break; | |
4193 | case LANMAN: | |
4194 | vol->secFlg = CIFSSEC_MUST_LANMAN; | |
4195 | break; | |
4196 | } | |
4197 | ||
4198 | return cifs_set_cifscreds(vol, ses); | |
4199 | } | |
4200 | ||
96daf2b0 | 4201 | static struct cifs_tcon * |
9d002df4 JL |
4202 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid) |
4203 | { | |
8a8798a5 | 4204 | int rc; |
96daf2b0 SF |
4205 | struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); |
4206 | struct cifs_ses *ses; | |
4207 | struct cifs_tcon *tcon = NULL; | |
9d002df4 | 4208 | struct smb_vol *vol_info; |
9d002df4 JL |
4209 | |
4210 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
803ab977 DC |
4211 | if (vol_info == NULL) |
4212 | return ERR_PTR(-ENOMEM); | |
9d002df4 | 4213 | |
9d002df4 JL |
4214 | vol_info->local_nls = cifs_sb->local_nls; |
4215 | vol_info->linux_uid = fsuid; | |
4216 | vol_info->cred_uid = fsuid; | |
4217 | vol_info->UNC = master_tcon->treeName; | |
4218 | vol_info->retry = master_tcon->retry; | |
4219 | vol_info->nocase = master_tcon->nocase; | |
4220 | vol_info->local_lease = master_tcon->local_lease; | |
4221 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
4222 | ||
8a8798a5 JL |
4223 | rc = cifs_set_vol_auth(vol_info, master_tcon->ses); |
4224 | if (rc) { | |
4225 | tcon = ERR_PTR(rc); | |
4226 | goto out; | |
4227 | } | |
9d002df4 JL |
4228 | |
4229 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 4230 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 4231 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 4232 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
4233 | |
4234 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
4235 | if (IS_ERR(ses)) { | |
96daf2b0 | 4236 | tcon = (struct cifs_tcon *)ses; |
9d002df4 JL |
4237 | cifs_put_tcp_session(master_tcon->ses->server); |
4238 | goto out; | |
4239 | } | |
4240 | ||
4241 | tcon = cifs_get_tcon(ses, vol_info); | |
4242 | if (IS_ERR(tcon)) { | |
4243 | cifs_put_smb_ses(ses); | |
4244 | goto out; | |
4245 | } | |
4246 | ||
4247 | if (ses->capabilities & CAP_UNIX) | |
4248 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); | |
4249 | out: | |
8a8798a5 JL |
4250 | kfree(vol_info->username); |
4251 | kfree(vol_info->password); | |
9d002df4 JL |
4252 | kfree(vol_info); |
4253 | ||
4254 | return tcon; | |
4255 | } | |
4256 | ||
96daf2b0 | 4257 | struct cifs_tcon * |
9d002df4 JL |
4258 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) |
4259 | { | |
4260 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
4261 | } | |
4262 | ||
4263 | static int | |
4264 | cifs_sb_tcon_pending_wait(void *unused) | |
4265 | { | |
4266 | schedule(); | |
4267 | return signal_pending(current) ? -ERESTARTSYS : 0; | |
4268 | } | |
4269 | ||
b647c35f JL |
4270 | /* find and return a tlink with given uid */ |
4271 | static struct tcon_link * | |
4272 | tlink_rb_search(struct rb_root *root, uid_t uid) | |
4273 | { | |
4274 | struct rb_node *node = root->rb_node; | |
4275 | struct tcon_link *tlink; | |
4276 | ||
4277 | while (node) { | |
4278 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
4279 | ||
4280 | if (tlink->tl_uid > uid) | |
4281 | node = node->rb_left; | |
4282 | else if (tlink->tl_uid < uid) | |
4283 | node = node->rb_right; | |
4284 | else | |
4285 | return tlink; | |
4286 | } | |
4287 | return NULL; | |
4288 | } | |
4289 | ||
4290 | /* insert a tcon_link into the tree */ | |
4291 | static void | |
4292 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
4293 | { | |
4294 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
4295 | struct tcon_link *tlink; | |
4296 | ||
4297 | while (*new) { | |
4298 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
4299 | parent = *new; | |
4300 | ||
4301 | if (tlink->tl_uid > new_tlink->tl_uid) | |
4302 | new = &((*new)->rb_left); | |
4303 | else | |
4304 | new = &((*new)->rb_right); | |
4305 | } | |
4306 | ||
4307 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
4308 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
4309 | } | |
4310 | ||
9d002df4 JL |
4311 | /* |
4312 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
4313 | * current task. | |
4314 | * | |
4315 | * If the superblock doesn't refer to a multiuser mount, then just return | |
4316 | * the master tcon for the mount. | |
4317 | * | |
6ef933a3 | 4318 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
4319 | * exists, then check to see if it's pending construction. If it is then wait |
4320 | * for construction to complete. Once it's no longer pending, check to see if | |
4321 | * it failed and either return an error or retry construction, depending on | |
4322 | * the timeout. | |
4323 | * | |
4324 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
4325 | * try to construct a new one. | |
4326 | */ | |
4327 | struct tcon_link * | |
4328 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
4329 | { | |
4330 | int ret; | |
b647c35f | 4331 | uid_t fsuid = current_fsuid(); |
9d002df4 JL |
4332 | struct tcon_link *tlink, *newtlink; |
4333 | ||
4334 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
4335 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
4336 | ||
4337 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 4338 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4339 | if (tlink) |
4340 | cifs_get_tlink(tlink); | |
4341 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4342 | ||
4343 | if (tlink == NULL) { | |
4344 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
4345 | if (newtlink == NULL) | |
4346 | return ERR_PTR(-ENOMEM); | |
b647c35f | 4347 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
4348 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
4349 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
4350 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
4351 | cifs_get_tlink(newtlink); | |
4352 | ||
9d002df4 JL |
4353 | spin_lock(&cifs_sb->tlink_tree_lock); |
4354 | /* was one inserted after previous search? */ | |
b647c35f | 4355 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4356 | if (tlink) { |
4357 | cifs_get_tlink(tlink); | |
4358 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4359 | kfree(newtlink); |
4360 | goto wait_for_construction; | |
4361 | } | |
9d002df4 | 4362 | tlink = newtlink; |
b647c35f JL |
4363 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
4364 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4365 | } else { |
4366 | wait_for_construction: | |
4367 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
4368 | cifs_sb_tcon_pending_wait, | |
4369 | TASK_INTERRUPTIBLE); | |
4370 | if (ret) { | |
4371 | cifs_put_tlink(tlink); | |
4372 | return ERR_PTR(ret); | |
4373 | } | |
4374 | ||
4375 | /* if it's good, return it */ | |
4376 | if (!IS_ERR(tlink->tl_tcon)) | |
4377 | return tlink; | |
4378 | ||
4379 | /* return error if we tried this already recently */ | |
4380 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
4381 | cifs_put_tlink(tlink); | |
4382 | return ERR_PTR(-EACCES); | |
4383 | } | |
4384 | ||
4385 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
4386 | goto wait_for_construction; | |
4387 | } | |
4388 | ||
4389 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
4390 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
4391 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
4392 | ||
4393 | if (IS_ERR(tlink->tl_tcon)) { | |
4394 | cifs_put_tlink(tlink); | |
4395 | return ERR_PTR(-EACCES); | |
4396 | } | |
4397 | ||
4398 | return tlink; | |
4399 | } | |
2de970ff JL |
4400 | |
4401 | /* | |
4402 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
4403 | * out tcons. | |
4404 | */ | |
4405 | static void | |
4406 | cifs_prune_tlinks(struct work_struct *work) | |
4407 | { | |
4408 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
4409 | prune_tlinks.work); | |
b647c35f JL |
4410 | struct rb_root *root = &cifs_sb->tlink_tree; |
4411 | struct rb_node *node = rb_first(root); | |
4412 | struct rb_node *tmp; | |
4413 | struct tcon_link *tlink; | |
2de970ff | 4414 | |
b647c35f JL |
4415 | /* |
4416 | * Because we drop the spinlock in the loop in order to put the tlink | |
4417 | * it's not guarded against removal of links from the tree. The only | |
4418 | * places that remove entries from the tree are this function and | |
4419 | * umounts. Because this function is non-reentrant and is canceled | |
4420 | * before umount can proceed, this is safe. | |
4421 | */ | |
4422 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4423 | node = rb_first(root); | |
4424 | while (node != NULL) { | |
4425 | tmp = node; | |
4426 | node = rb_next(tmp); | |
4427 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
4428 | ||
4429 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
4430 | atomic_read(&tlink->tl_count) != 0 || | |
4431 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
4432 | continue; | |
2de970ff | 4433 | |
b647c35f JL |
4434 | cifs_get_tlink(tlink); |
4435 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4436 | rb_erase(tmp, root); | |
4437 | ||
4438 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4439 | cifs_put_tlink(tlink); | |
4440 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4441 | } | |
4442 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff | 4443 | |
da472fc8 | 4444 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
4445 | TLINK_IDLE_EXPIRE); |
4446 | } |