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> | |
3f07c014 | 24 | #include <linux/sched/signal.h> |
1da177e4 LT |
25 | #include <linux/list.h> |
26 | #include <linux/wait.h> | |
5a0e3ad6 | 27 | #include <linux/slab.h> |
1da177e4 LT |
28 | #include <linux/pagemap.h> |
29 | #include <linux/ctype.h> | |
30 | #include <linux/utsname.h> | |
31 | #include <linux/mempool.h> | |
b8643e1b | 32 | #include <linux/delay.h> |
f191401f | 33 | #include <linux/completion.h> |
aaf737ad | 34 | #include <linux/kthread.h> |
0ae0efad | 35 | #include <linux/pagevec.h> |
7dfb7103 | 36 | #include <linux/freezer.h> |
5c2503a8 | 37 | #include <linux/namei.h> |
c6e970a0 | 38 | #include <linux/uuid.h> |
7c0f6ba6 | 39 | #include <linux/uaccess.h> |
1da177e4 | 40 | #include <asm/processor.h> |
50b64e3b | 41 | #include <linux/inet.h> |
143cb494 | 42 | #include <linux/module.h> |
8a8798a5 | 43 | #include <keys/user-type.h> |
0e2bedaa | 44 | #include <net/ipv6.h> |
8830d7e0 | 45 | #include <linux/parser.h> |
2f8b5444 | 46 | #include <linux/bvec.h> |
1da177e4 LT |
47 | #include "cifspdu.h" |
48 | #include "cifsglob.h" | |
49 | #include "cifsproto.h" | |
50 | #include "cifs_unicode.h" | |
51 | #include "cifs_debug.h" | |
52 | #include "cifs_fs_sb.h" | |
53 | #include "ntlmssp.h" | |
54 | #include "nterr.h" | |
55 | #include "rfc1002pdu.h" | |
488f1d2d | 56 | #include "fscache.h" |
53e0e11e | 57 | #include "smb2proto.h" |
2f894646 | 58 | #include "smbdirect.h" |
1da177e4 LT |
59 | |
60 | #define CIFS_PORT 445 | |
61 | #define RFC1001_PORT 139 | |
62 | ||
1da177e4 LT |
63 | extern mempool_t *cifs_req_poolp; |
64 | ||
2de970ff | 65 | /* FIXME: should these be tunable? */ |
9d002df4 | 66 | #define TLINK_ERROR_EXPIRE (1 * HZ) |
2de970ff | 67 | #define TLINK_IDLE_EXPIRE (600 * HZ) |
9d002df4 | 68 | |
8830d7e0 | 69 | enum { |
8830d7e0 SP |
70 | /* Mount options that take no arguments */ |
71 | Opt_user_xattr, Opt_nouser_xattr, | |
72 | Opt_forceuid, Opt_noforceuid, | |
72bd481f | 73 | Opt_forcegid, Opt_noforcegid, |
8830d7e0 SP |
74 | Opt_noblocksend, Opt_noautotune, |
75 | Opt_hard, Opt_soft, Opt_perm, Opt_noperm, | |
2baa2682 | 76 | Opt_mapposix, Opt_nomapposix, |
8830d7e0 SP |
77 | Opt_mapchars, Opt_nomapchars, Opt_sfu, |
78 | Opt_nosfu, Opt_nodfs, Opt_posixpaths, | |
79 | Opt_noposixpaths, Opt_nounix, | |
80 | Opt_nocase, | |
81 | Opt_brl, Opt_nobrl, | |
95932655 | 82 | Opt_forcemandatorylock, Opt_setuidfromacl, Opt_setuids, |
8830d7e0 SP |
83 | Opt_nosetuids, Opt_dynperm, Opt_nodynperm, |
84 | Opt_nohard, Opt_nosoft, | |
85 | Opt_nointr, Opt_intr, | |
86 | Opt_nostrictsync, Opt_strictsync, | |
87 | Opt_serverino, Opt_noserverino, | |
88 | Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl, | |
89 | Opt_acl, Opt_noacl, Opt_locallease, | |
1b359204 | 90 | Opt_sign, Opt_seal, Opt_noac, |
8830d7e0 | 91 | Opt_fsc, Opt_mfsymlinks, |
a0b3df5c | 92 | Opt_multiuser, Opt_sloppy, Opt_nosharesock, |
b2a30774 | 93 | Opt_persistent, Opt_nopersistent, |
592fafe6 | 94 | Opt_resilient, Opt_noresilient, |
8339dd32 | 95 | Opt_domainauto, Opt_rdma, |
8830d7e0 SP |
96 | |
97 | /* Mount options which take numeric value */ | |
98 | Opt_backupuid, Opt_backupgid, Opt_uid, | |
99 | Opt_cruid, Opt_gid, Opt_file_mode, | |
100 | Opt_dirmode, Opt_port, | |
101 | Opt_rsize, Opt_wsize, Opt_actimeo, | |
141891f4 | 102 | Opt_echo_interval, Opt_max_credits, |
8b217fe7 | 103 | Opt_snapshot, |
8830d7e0 SP |
104 | |
105 | /* Mount options which take string value */ | |
106 | Opt_user, Opt_pass, Opt_ip, | |
73a999fa | 107 | Opt_domain, Opt_srcaddr, Opt_iocharset, |
8830d7e0 | 108 | Opt_netbiosname, Opt_servern, |
23db65f5 | 109 | Opt_ver, Opt_vers, Opt_sec, Opt_cache, |
8830d7e0 SP |
110 | |
111 | /* Mount options to be ignored */ | |
112 | Opt_ignore, | |
113 | ||
114 | /* Options which could be blank */ | |
115 | Opt_blank_pass, | |
4fe9e963 SP |
116 | Opt_blank_user, |
117 | Opt_blank_ip, | |
8830d7e0 SP |
118 | |
119 | Opt_err | |
120 | }; | |
121 | ||
122 | static const match_table_t cifs_mount_option_tokens = { | |
123 | ||
124 | { Opt_user_xattr, "user_xattr" }, | |
125 | { Opt_nouser_xattr, "nouser_xattr" }, | |
126 | { Opt_forceuid, "forceuid" }, | |
127 | { Opt_noforceuid, "noforceuid" }, | |
72bd481f JL |
128 | { Opt_forcegid, "forcegid" }, |
129 | { Opt_noforcegid, "noforcegid" }, | |
8830d7e0 SP |
130 | { Opt_noblocksend, "noblocksend" }, |
131 | { Opt_noautotune, "noautotune" }, | |
132 | { Opt_hard, "hard" }, | |
133 | { Opt_soft, "soft" }, | |
134 | { Opt_perm, "perm" }, | |
135 | { Opt_noperm, "noperm" }, | |
2baa2682 | 136 | { Opt_mapchars, "mapchars" }, /* SFU style */ |
8830d7e0 | 137 | { Opt_nomapchars, "nomapchars" }, |
2baa2682 SF |
138 | { Opt_mapposix, "mapposix" }, /* SFM style */ |
139 | { Opt_nomapposix, "nomapposix" }, | |
8830d7e0 SP |
140 | { Opt_sfu, "sfu" }, |
141 | { Opt_nosfu, "nosfu" }, | |
142 | { Opt_nodfs, "nodfs" }, | |
143 | { Opt_posixpaths, "posixpaths" }, | |
144 | { Opt_noposixpaths, "noposixpaths" }, | |
145 | { Opt_nounix, "nounix" }, | |
146 | { Opt_nounix, "nolinux" }, | |
147 | { Opt_nocase, "nocase" }, | |
148 | { Opt_nocase, "ignorecase" }, | |
149 | { Opt_brl, "brl" }, | |
150 | { Opt_nobrl, "nobrl" }, | |
151 | { Opt_nobrl, "nolock" }, | |
152 | { Opt_forcemandatorylock, "forcemandatorylock" }, | |
5cfdddcf | 153 | { Opt_forcemandatorylock, "forcemand" }, |
8830d7e0 SP |
154 | { Opt_setuids, "setuids" }, |
155 | { Opt_nosetuids, "nosetuids" }, | |
95932655 | 156 | { Opt_setuidfromacl, "idsfromsid" }, |
8830d7e0 SP |
157 | { Opt_dynperm, "dynperm" }, |
158 | { Opt_nodynperm, "nodynperm" }, | |
159 | { Opt_nohard, "nohard" }, | |
160 | { Opt_nosoft, "nosoft" }, | |
161 | { Opt_nointr, "nointr" }, | |
162 | { Opt_intr, "intr" }, | |
163 | { Opt_nostrictsync, "nostrictsync" }, | |
164 | { Opt_strictsync, "strictsync" }, | |
165 | { Opt_serverino, "serverino" }, | |
166 | { Opt_noserverino, "noserverino" }, | |
167 | { Opt_rwpidforward, "rwpidforward" }, | |
168 | { Opt_cifsacl, "cifsacl" }, | |
169 | { Opt_nocifsacl, "nocifsacl" }, | |
170 | { Opt_acl, "acl" }, | |
171 | { Opt_noacl, "noacl" }, | |
172 | { Opt_locallease, "locallease" }, | |
173 | { Opt_sign, "sign" }, | |
174 | { Opt_seal, "seal" }, | |
8830d7e0 SP |
175 | { Opt_noac, "noac" }, |
176 | { Opt_fsc, "fsc" }, | |
177 | { Opt_mfsymlinks, "mfsymlinks" }, | |
178 | { Opt_multiuser, "multiuser" }, | |
d8162558 | 179 | { Opt_sloppy, "sloppy" }, |
a0b3df5c | 180 | { Opt_nosharesock, "nosharesock" }, |
b2a30774 SF |
181 | { Opt_persistent, "persistenthandles"}, |
182 | { Opt_nopersistent, "nopersistenthandles"}, | |
592fafe6 SF |
183 | { Opt_resilient, "resilienthandles"}, |
184 | { Opt_noresilient, "noresilienthandles"}, | |
39566443 | 185 | { Opt_domainauto, "domainauto"}, |
8339dd32 | 186 | { Opt_rdma, "rdma"}, |
8830d7e0 SP |
187 | |
188 | { Opt_backupuid, "backupuid=%s" }, | |
189 | { Opt_backupgid, "backupgid=%s" }, | |
190 | { Opt_uid, "uid=%s" }, | |
191 | { Opt_cruid, "cruid=%s" }, | |
192 | { Opt_gid, "gid=%s" }, | |
193 | { Opt_file_mode, "file_mode=%s" }, | |
194 | { Opt_dirmode, "dirmode=%s" }, | |
195 | { Opt_dirmode, "dir_mode=%s" }, | |
196 | { Opt_port, "port=%s" }, | |
197 | { Opt_rsize, "rsize=%s" }, | |
198 | { Opt_wsize, "wsize=%s" }, | |
199 | { Opt_actimeo, "actimeo=%s" }, | |
adfeb3e0 | 200 | { Opt_echo_interval, "echo_interval=%s" }, |
141891f4 | 201 | { Opt_max_credits, "max_credits=%s" }, |
8b217fe7 | 202 | { Opt_snapshot, "snapshot=%s" }, |
8830d7e0 | 203 | |
4fe9e963 SP |
204 | { Opt_blank_user, "user=" }, |
205 | { Opt_blank_user, "username=" }, | |
8830d7e0 SP |
206 | { Opt_user, "user=%s" }, |
207 | { Opt_user, "username=%s" }, | |
208 | { Opt_blank_pass, "pass=" }, | |
3c15b4cf | 209 | { Opt_blank_pass, "password=" }, |
8830d7e0 SP |
210 | { Opt_pass, "pass=%s" }, |
211 | { Opt_pass, "password=%s" }, | |
4fe9e963 SP |
212 | { Opt_blank_ip, "ip=" }, |
213 | { Opt_blank_ip, "addr=" }, | |
8830d7e0 SP |
214 | { Opt_ip, "ip=%s" }, |
215 | { Opt_ip, "addr=%s" }, | |
73a999fa JL |
216 | { Opt_ignore, "unc=%s" }, |
217 | { Opt_ignore, "target=%s" }, | |
218 | { Opt_ignore, "path=%s" }, | |
8830d7e0 SP |
219 | { Opt_domain, "dom=%s" }, |
220 | { Opt_domain, "domain=%s" }, | |
221 | { Opt_domain, "workgroup=%s" }, | |
222 | { Opt_srcaddr, "srcaddr=%s" }, | |
73a999fa | 223 | { Opt_ignore, "prefixpath=%s" }, |
8830d7e0 | 224 | { Opt_iocharset, "iocharset=%s" }, |
8830d7e0 SP |
225 | { Opt_netbiosname, "netbiosname=%s" }, |
226 | { Opt_servern, "servern=%s" }, | |
227 | { Opt_ver, "ver=%s" }, | |
23db65f5 | 228 | { Opt_vers, "vers=%s" }, |
8830d7e0 | 229 | { Opt_sec, "sec=%s" }, |
15b6a473 | 230 | { Opt_cache, "cache=%s" }, |
8830d7e0 SP |
231 | |
232 | { Opt_ignore, "cred" }, | |
233 | { Opt_ignore, "credentials" }, | |
a557b976 JL |
234 | { Opt_ignore, "cred=%s" }, |
235 | { Opt_ignore, "credentials=%s" }, | |
8830d7e0 SP |
236 | { Opt_ignore, "guest" }, |
237 | { Opt_ignore, "rw" }, | |
238 | { Opt_ignore, "ro" }, | |
239 | { Opt_ignore, "suid" }, | |
240 | { Opt_ignore, "nosuid" }, | |
241 | { Opt_ignore, "exec" }, | |
242 | { Opt_ignore, "noexec" }, | |
243 | { Opt_ignore, "nodev" }, | |
244 | { Opt_ignore, "noauto" }, | |
245 | { Opt_ignore, "dev" }, | |
246 | { Opt_ignore, "mand" }, | |
247 | { Opt_ignore, "nomand" }, | |
248 | { Opt_ignore, "_netdev" }, | |
249 | ||
250 | { Opt_err, NULL } | |
251 | }; | |
252 | ||
253 | enum { | |
254 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
255 | Opt_sec_ntlmsspi, Opt_sec_ntlmssp, | |
7659624f JL |
256 | Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2, |
257 | Opt_sec_ntlmv2i, Opt_sec_lanman, | |
8830d7e0 SP |
258 | Opt_sec_none, |
259 | ||
260 | Opt_sec_err | |
261 | }; | |
262 | ||
263 | static const match_table_t cifs_secflavor_tokens = { | |
264 | { Opt_sec_krb5, "krb5" }, | |
265 | { Opt_sec_krb5i, "krb5i" }, | |
266 | { Opt_sec_krb5p, "krb5p" }, | |
267 | { Opt_sec_ntlmsspi, "ntlmsspi" }, | |
268 | { Opt_sec_ntlmssp, "ntlmssp" }, | |
269 | { Opt_ntlm, "ntlm" }, | |
270 | { Opt_sec_ntlmi, "ntlmi" }, | |
7659624f JL |
271 | { Opt_sec_ntlmv2, "nontlm" }, |
272 | { Opt_sec_ntlmv2, "ntlmv2" }, | |
8830d7e0 | 273 | { Opt_sec_ntlmv2i, "ntlmv2i" }, |
8830d7e0 SP |
274 | { Opt_sec_lanman, "lanman" }, |
275 | { Opt_sec_none, "none" }, | |
276 | ||
277 | { Opt_sec_err, NULL } | |
278 | }; | |
279 | ||
15b6a473 JL |
280 | /* cache flavors */ |
281 | enum { | |
282 | Opt_cache_loose, | |
283 | Opt_cache_strict, | |
284 | Opt_cache_none, | |
285 | Opt_cache_err | |
286 | }; | |
287 | ||
288 | static const match_table_t cifs_cacheflavor_tokens = { | |
289 | { Opt_cache_loose, "loose" }, | |
290 | { Opt_cache_strict, "strict" }, | |
291 | { Opt_cache_none, "none" }, | |
292 | { Opt_cache_err, NULL } | |
293 | }; | |
294 | ||
23db65f5 JL |
295 | static const match_table_t cifs_smb_version_tokens = { |
296 | { Smb_1, SMB1_VERSION_STRING }, | |
dd446b16 | 297 | { Smb_20, SMB20_VERSION_STRING}, |
1080ef75 | 298 | { Smb_21, SMB21_VERSION_STRING }, |
e4aa25e7 | 299 | { Smb_30, SMB30_VERSION_STRING }, |
20b6d8b4 | 300 | { Smb_302, SMB302_VERSION_STRING }, |
5f7fbf73 SF |
301 | #ifdef CONFIG_CIFS_SMB311 |
302 | { Smb_311, SMB311_VERSION_STRING }, | |
aab1893d | 303 | { Smb_311, ALT_SMB311_VERSION_STRING }, |
5f7fbf73 | 304 | #endif /* SMB311 */ |
9764c02f SF |
305 | { Smb_3any, SMB3ANY_VERSION_STRING }, |
306 | { Smb_default, SMBDEFAULT_VERSION_STRING }, | |
5f7fbf73 | 307 | { Smb_version_err, NULL } |
23db65f5 JL |
308 | }; |
309 | ||
a9f1b85e PS |
310 | static int ip_connect(struct TCP_Server_Info *server); |
311 | static int generic_ip_connect(struct TCP_Server_Info *server); | |
b647c35f | 312 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
2de970ff | 313 | static void cifs_prune_tlinks(struct work_struct *work); |
b9bce2e9 JL |
314 | static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
315 | const char *devname); | |
1da177e4 | 316 | |
d5c5605c JL |
317 | /* |
318 | * cifs tcp session reconnection | |
319 | * | |
320 | * mark tcp session as reconnecting so temporarily locked | |
321 | * mark all smb sessions as reconnecting for tcp session | |
322 | * reconnect tcp session | |
323 | * wake up waiters on reconnection? - (not needed currently) | |
324 | */ | |
28ea5290 | 325 | int |
1da177e4 LT |
326 | cifs_reconnect(struct TCP_Server_Info *server) |
327 | { | |
328 | int rc = 0; | |
f1987b44 | 329 | struct list_head *tmp, *tmp2; |
96daf2b0 SF |
330 | struct cifs_ses *ses; |
331 | struct cifs_tcon *tcon; | |
fb8c4b14 | 332 | struct mid_q_entry *mid_entry; |
3c1105df | 333 | struct list_head retry_list; |
50c2f753 | 334 | |
1da177e4 | 335 | spin_lock(&GlobalMid_Lock); |
469ee614 | 336 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 337 | /* the demux thread will exit normally |
1da177e4 LT |
338 | next time through the loop */ |
339 | spin_unlock(&GlobalMid_Lock); | |
340 | return rc; | |
341 | } else | |
342 | server->tcpStatus = CifsNeedReconnect; | |
343 | spin_unlock(&GlobalMid_Lock); | |
344 | server->maxBuf = 0; | |
aa24d1e9 | 345 | server->max_read = 0; |
1da177e4 | 346 | |
f96637be | 347 | cifs_dbg(FYI, "Reconnecting tcp session\n"); |
1da177e4 LT |
348 | |
349 | /* before reconnecting the tcp session, mark the smb session (uid) | |
350 | and the tid bad so they are not used until reconnected */ | |
f96637be JP |
351 | cifs_dbg(FYI, "%s: marking sessions and tcons for reconnect\n", |
352 | __func__); | |
3f9bcca7 | 353 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 354 | list_for_each(tmp, &server->smb_ses_list) { |
96daf2b0 | 355 | ses = list_entry(tmp, struct cifs_ses, smb_ses_list); |
14fbf50d | 356 | ses->need_reconnect = true; |
f1987b44 | 357 | list_for_each(tmp2, &ses->tcon_list) { |
96daf2b0 | 358 | tcon = list_entry(tmp2, struct cifs_tcon, tcon_list); |
3b795210 | 359 | tcon->need_reconnect = true; |
1da177e4 | 360 | } |
b327a717 AA |
361 | if (ses->tcon_ipc) |
362 | ses->tcon_ipc->need_reconnect = true; | |
1da177e4 | 363 | } |
3f9bcca7 | 364 | spin_unlock(&cifs_tcp_ses_lock); |
2b84a36c | 365 | |
1da177e4 | 366 | /* do not want to be sending data on a socket we are freeing */ |
f96637be | 367 | cifs_dbg(FYI, "%s: tearing down socket\n", __func__); |
72ca545b | 368 | mutex_lock(&server->srv_mutex); |
fb8c4b14 | 369 | if (server->ssocket) { |
f96637be JP |
370 | cifs_dbg(FYI, "State: 0x%x Flags: 0x%lx\n", |
371 | server->ssocket->state, server->ssocket->flags); | |
91cf45f0 | 372 | kernel_sock_shutdown(server->ssocket, SHUT_WR); |
f96637be JP |
373 | cifs_dbg(FYI, "Post shutdown state: 0x%x Flags: 0x%lx\n", |
374 | server->ssocket->state, server->ssocket->flags); | |
1da177e4 LT |
375 | sock_release(server->ssocket); |
376 | server->ssocket = NULL; | |
377 | } | |
5d0d2882 SP |
378 | server->sequence_number = 0; |
379 | server->session_estab = false; | |
21e73393 SP |
380 | kfree(server->session_key.response); |
381 | server->session_key.response = NULL; | |
382 | server->session_key.len = 0; | |
fda35943 | 383 | server->lstrp = jiffies; |
1da177e4 | 384 | |
2b84a36c | 385 | /* mark submitted MIDs for retry and issue callback */ |
3c1105df | 386 | INIT_LIST_HEAD(&retry_list); |
f96637be | 387 | cifs_dbg(FYI, "%s: moving mids to private list\n", __func__); |
1da177e4 | 388 | spin_lock(&GlobalMid_Lock); |
2b84a36c JL |
389 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
390 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 PS |
391 | if (mid_entry->mid_state == MID_REQUEST_SUBMITTED) |
392 | mid_entry->mid_state = MID_RETRY_NEEDED; | |
3c1105df JL |
393 | list_move(&mid_entry->qhead, &retry_list); |
394 | } | |
395 | spin_unlock(&GlobalMid_Lock); | |
820962dc | 396 | mutex_unlock(&server->srv_mutex); |
3c1105df | 397 | |
f96637be | 398 | cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__); |
3c1105df JL |
399 | list_for_each_safe(tmp, tmp2, &retry_list) { |
400 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
2b84a36c JL |
401 | list_del_init(&mid_entry->qhead); |
402 | mid_entry->callback(mid_entry); | |
1da177e4 | 403 | } |
1da177e4 | 404 | |
7fdbaa1b | 405 | do { |
6c3d8909 | 406 | try_to_freeze(); |
a9f1b85e PS |
407 | |
408 | /* we should try only the port we connected to before */ | |
73e216a8 | 409 | mutex_lock(&server->srv_mutex); |
781a8050 LL |
410 | if (cifs_rdma_enabled(server)) |
411 | rc = smbd_reconnect(server); | |
412 | else | |
413 | rc = generic_ip_connect(server); | |
fb8c4b14 | 414 | if (rc) { |
f96637be | 415 | cifs_dbg(FYI, "reconnect error %d\n", rc); |
4afe260b | 416 | mutex_unlock(&server->srv_mutex); |
0cb766ae | 417 | msleep(3000); |
1da177e4 LT |
418 | } else { |
419 | atomic_inc(&tcpSesReconnectCount); | |
420 | spin_lock(&GlobalMid_Lock); | |
469ee614 | 421 | if (server->tcpStatus != CifsExiting) |
fd88ce93 | 422 | server->tcpStatus = CifsNeedNegotiate; |
fb8c4b14 | 423 | spin_unlock(&GlobalMid_Lock); |
4afe260b | 424 | mutex_unlock(&server->srv_mutex); |
1da177e4 | 425 | } |
7fdbaa1b | 426 | } while (server->tcpStatus == CifsNeedReconnect); |
2b84a36c | 427 | |
b8c60012 SP |
428 | if (server->tcpStatus == CifsNeedNegotiate) |
429 | mod_delayed_work(cifsiod_wq, &server->echo, 0); | |
430 | ||
1da177e4 LT |
431 | return rc; |
432 | } | |
433 | ||
c74093b6 JL |
434 | static void |
435 | cifs_echo_request(struct work_struct *work) | |
436 | { | |
437 | int rc; | |
438 | struct TCP_Server_Info *server = container_of(work, | |
439 | struct TCP_Server_Info, echo.work); | |
b8c60012 SP |
440 | unsigned long echo_interval; |
441 | ||
442 | /* | |
443 | * If we need to renegotiate, set echo interval to zero to | |
444 | * immediately call echo service where we can renegotiate. | |
445 | */ | |
446 | if (server->tcpStatus == CifsNeedNegotiate) | |
447 | echo_interval = 0; | |
448 | else | |
449 | echo_interval = server->echo_interval; | |
c74093b6 | 450 | |
247ec9b4 | 451 | /* |
b8c60012 SP |
452 | * We cannot send an echo if it is disabled. |
453 | * Also, no need to ping if we got a response recently. | |
247ec9b4 | 454 | */ |
4fcd1813 SF |
455 | |
456 | if (server->tcpStatus == CifsNeedReconnect || | |
b8c60012 SP |
457 | server->tcpStatus == CifsExiting || |
458 | server->tcpStatus == CifsNew || | |
f6d76178 | 459 | (server->ops->can_echo && !server->ops->can_echo(server)) || |
adfeb3e0 | 460 | time_before(jiffies, server->lstrp + echo_interval - HZ)) |
c74093b6 JL |
461 | goto requeue_echo; |
462 | ||
f6d76178 | 463 | rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS; |
c74093b6 | 464 | if (rc) |
f96637be JP |
465 | cifs_dbg(FYI, "Unable to send echo request to server: %s\n", |
466 | server->hostname); | |
c74093b6 JL |
467 | |
468 | requeue_echo: | |
b8c60012 | 469 | queue_delayed_work(cifsiod_wq, &server->echo, server->echo_interval); |
c74093b6 JL |
470 | } |
471 | ||
3d9c2472 | 472 | static bool |
2a37ef94 | 473 | allocate_buffers(struct TCP_Server_Info *server) |
3d9c2472 | 474 | { |
2a37ef94 JL |
475 | if (!server->bigbuf) { |
476 | server->bigbuf = (char *)cifs_buf_get(); | |
477 | if (!server->bigbuf) { | |
f96637be | 478 | cifs_dbg(VFS, "No memory for large SMB response\n"); |
3d9c2472 PS |
479 | msleep(3000); |
480 | /* retry will check if exiting */ | |
481 | return false; | |
482 | } | |
2a37ef94 | 483 | } else if (server->large_buf) { |
3d9c2472 | 484 | /* we are reusing a dirty large buf, clear its start */ |
1887f601 | 485 | memset(server->bigbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
486 | } |
487 | ||
2a37ef94 JL |
488 | if (!server->smallbuf) { |
489 | server->smallbuf = (char *)cifs_small_buf_get(); | |
490 | if (!server->smallbuf) { | |
f96637be | 491 | cifs_dbg(VFS, "No memory for SMB response\n"); |
3d9c2472 PS |
492 | msleep(1000); |
493 | /* retry will check if exiting */ | |
494 | return false; | |
495 | } | |
496 | /* beginning of smb buffer is cleared in our buf_get */ | |
497 | } else { | |
498 | /* if existing small buf clear beginning */ | |
1887f601 | 499 | memset(server->smallbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
500 | } |
501 | ||
3d9c2472 PS |
502 | return true; |
503 | } | |
504 | ||
ba749e6d JL |
505 | static bool |
506 | server_unresponsive(struct TCP_Server_Info *server) | |
507 | { | |
6dae51a5 PS |
508 | /* |
509 | * We need to wait 2 echo intervals to make sure we handle such | |
510 | * situations right: | |
511 | * 1s client sends a normal SMB request | |
512 | * 2s client gets a response | |
513 | * 30s echo workqueue job pops, and decides we got a response recently | |
514 | * and don't need to send another | |
515 | * ... | |
516 | * 65s kernel_recvmsg times out, and we see that we haven't gotten | |
517 | * a response in >60s. | |
518 | */ | |
76e75270 SC |
519 | if ((server->tcpStatus == CifsGood || |
520 | server->tcpStatus == CifsNeedNegotiate) && | |
adfeb3e0 SF |
521 | time_after(jiffies, server->lstrp + 2 * server->echo_interval)) { |
522 | cifs_dbg(VFS, "Server %s has not responded in %lu seconds. Reconnecting...\n", | |
523 | server->hostname, (2 * server->echo_interval) / HZ); | |
ba749e6d JL |
524 | cifs_reconnect(server); |
525 | wake_up(&server->response_q); | |
526 | return true; | |
527 | } | |
528 | ||
529 | return false; | |
530 | } | |
531 | ||
71335664 AV |
532 | static int |
533 | cifs_readv_from_socket(struct TCP_Server_Info *server, struct msghdr *smb_msg) | |
e7015fb1 | 534 | { |
a52c1eb7 JL |
535 | int length = 0; |
536 | int total_read; | |
e7015fb1 | 537 | |
71335664 AV |
538 | smb_msg->msg_control = NULL; |
539 | smb_msg->msg_controllen = 0; | |
e831e6cf | 540 | |
71335664 | 541 | for (total_read = 0; msg_data_left(smb_msg); total_read += length) { |
95edcff4 JL |
542 | try_to_freeze(); |
543 | ||
71335664 AV |
544 | if (server_unresponsive(server)) |
545 | return -ECONNABORTED; | |
2fef137a LL |
546 | if (cifs_rdma_enabled(server) && server->smbd_conn) |
547 | length = smbd_recv(server->smbd_conn, smb_msg); | |
548 | else | |
549 | length = sock_recvmsg(server->ssocket, smb_msg, 0); | |
42c4dfc2 | 550 | |
71335664 AV |
551 | if (server->tcpStatus == CifsExiting) |
552 | return -ESHUTDOWN; | |
e7015fb1 | 553 | |
71335664 | 554 | if (server->tcpStatus == CifsNeedReconnect) { |
e7015fb1 | 555 | cifs_reconnect(server); |
71335664 AV |
556 | return -ECONNABORTED; |
557 | } | |
558 | ||
559 | if (length == -ERESTARTSYS || | |
560 | length == -EAGAIN || | |
561 | length == -EINTR) { | |
e7015fb1 PS |
562 | /* |
563 | * Minimum sleep to prevent looping, allowing socket | |
564 | * to clear and app threads to set tcpStatus | |
565 | * CifsNeedReconnect if server hung. | |
566 | */ | |
567 | usleep_range(1000, 2000); | |
568 | length = 0; | |
a52c1eb7 | 569 | continue; |
71335664 AV |
570 | } |
571 | ||
572 | if (length <= 0) { | |
09aab880 | 573 | cifs_dbg(FYI, "Received no data or error: %d\n", length); |
e7015fb1 | 574 | cifs_reconnect(server); |
71335664 | 575 | return -ECONNABORTED; |
e7015fb1 PS |
576 | } |
577 | } | |
a52c1eb7 | 578 | return total_read; |
e7015fb1 | 579 | } |
e7015fb1 | 580 | |
e28bc5b1 JL |
581 | int |
582 | cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, | |
583 | unsigned int to_read) | |
42c4dfc2 | 584 | { |
71335664 AV |
585 | struct msghdr smb_msg; |
586 | struct kvec iov = {.iov_base = buf, .iov_len = to_read}; | |
587 | iov_iter_kvec(&smb_msg.msg_iter, READ | ITER_KVEC, &iov, 1, to_read); | |
42c4dfc2 | 588 | |
71335664 AV |
589 | return cifs_readv_from_socket(server, &smb_msg); |
590 | } | |
42c4dfc2 | 591 | |
71335664 AV |
592 | int |
593 | cifs_read_page_from_socket(struct TCP_Server_Info *server, struct page *page, | |
594 | unsigned int to_read) | |
595 | { | |
596 | struct msghdr smb_msg; | |
597 | struct bio_vec bv = {.bv_page = page, .bv_len = to_read}; | |
598 | iov_iter_bvec(&smb_msg.msg_iter, READ | ITER_BVEC, &bv, 1, to_read); | |
599 | return cifs_readv_from_socket(server, &smb_msg); | |
e7015fb1 PS |
600 | } |
601 | ||
98bac62c | 602 | static bool |
fe11e4cc | 603 | is_smb_response(struct TCP_Server_Info *server, unsigned char type) |
98bac62c | 604 | { |
98bac62c PS |
605 | /* |
606 | * The first byte big endian of the length field, | |
607 | * is actually not part of the length but the type | |
608 | * with the most common, zero, as regular data. | |
609 | */ | |
fe11e4cc JL |
610 | switch (type) { |
611 | case RFC1002_SESSION_MESSAGE: | |
612 | /* Regular SMB response */ | |
613 | return true; | |
614 | case RFC1002_SESSION_KEEP_ALIVE: | |
f96637be | 615 | cifs_dbg(FYI, "RFC 1002 session keep alive\n"); |
fe11e4cc JL |
616 | break; |
617 | case RFC1002_POSITIVE_SESSION_RESPONSE: | |
f96637be | 618 | cifs_dbg(FYI, "RFC 1002 positive session response\n"); |
fe11e4cc JL |
619 | break; |
620 | case RFC1002_NEGATIVE_SESSION_RESPONSE: | |
98bac62c PS |
621 | /* |
622 | * We get this from Windows 98 instead of an error on | |
623 | * SMB negprot response. | |
624 | */ | |
f96637be | 625 | cifs_dbg(FYI, "RFC 1002 negative session response\n"); |
98bac62c PS |
626 | /* give server a second to clean up */ |
627 | msleep(1000); | |
628 | /* | |
629 | * Always try 445 first on reconnect since we get NACK | |
630 | * on some if we ever connected to port 139 (the NACK | |
631 | * is since we do not begin with RFC1001 session | |
632 | * initialize frame). | |
633 | */ | |
fe11e4cc | 634 | cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT); |
98bac62c PS |
635 | cifs_reconnect(server); |
636 | wake_up(&server->response_q); | |
fe11e4cc JL |
637 | break; |
638 | default: | |
f96637be | 639 | cifs_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type); |
98bac62c | 640 | cifs_reconnect(server); |
98bac62c PS |
641 | } |
642 | ||
fe11e4cc | 643 | return false; |
98bac62c PS |
644 | } |
645 | ||
e28bc5b1 JL |
646 | void |
647 | dequeue_mid(struct mid_q_entry *mid, bool malformed) | |
ea1f4502 | 648 | { |
ad69bae1 | 649 | #ifdef CONFIG_CIFS_STATS2 |
ea1f4502 | 650 | mid->when_received = jiffies; |
ad69bae1 | 651 | #endif |
ea1f4502 JL |
652 | spin_lock(&GlobalMid_Lock); |
653 | if (!malformed) | |
7c9421e1 | 654 | mid->mid_state = MID_RESPONSE_RECEIVED; |
ea1f4502 | 655 | else |
7c9421e1 | 656 | mid->mid_state = MID_RESPONSE_MALFORMED; |
ea1f4502 | 657 | list_del_init(&mid->qhead); |
ad69bae1 | 658 | spin_unlock(&GlobalMid_Lock); |
ea1f4502 | 659 | } |
ad69bae1 | 660 | |
c8054ebd JL |
661 | static void |
662 | handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, | |
d4e4854f | 663 | char *buf, int malformed) |
ea1f4502 | 664 | { |
316cf94a PS |
665 | if (server->ops->check_trans2 && |
666 | server->ops->check_trans2(mid, server, buf, malformed)) | |
c8054ebd | 667 | return; |
ea1f4502 | 668 | mid->resp_buf = buf; |
7c9421e1 | 669 | mid->large_buf = server->large_buf; |
2a37ef94 JL |
670 | /* Was previous buf put in mpx struct for multi-rsp? */ |
671 | if (!mid->multiRsp) { | |
672 | /* smb buffer will be freed by user thread */ | |
673 | if (server->large_buf) | |
674 | server->bigbuf = NULL; | |
675 | else | |
676 | server->smallbuf = NULL; | |
677 | } | |
ffc00e27 | 678 | dequeue_mid(mid, malformed); |
ad69bae1 PS |
679 | } |
680 | ||
762dfd10 PS |
681 | static void clean_demultiplex_info(struct TCP_Server_Info *server) |
682 | { | |
683 | int length; | |
684 | ||
685 | /* take it off the list, if it's not already */ | |
686 | spin_lock(&cifs_tcp_ses_lock); | |
687 | list_del_init(&server->tcp_ses_list); | |
688 | spin_unlock(&cifs_tcp_ses_lock); | |
689 | ||
690 | spin_lock(&GlobalMid_Lock); | |
691 | server->tcpStatus = CifsExiting; | |
692 | spin_unlock(&GlobalMid_Lock); | |
693 | wake_up_all(&server->response_q); | |
694 | ||
2d86dbc9 | 695 | /* check if we have blocked requests that need to free */ |
fc40f9cf | 696 | spin_lock(&server->req_lock); |
2d86dbc9 PS |
697 | if (server->credits <= 0) |
698 | server->credits = 1; | |
fc40f9cf | 699 | spin_unlock(&server->req_lock); |
762dfd10 PS |
700 | /* |
701 | * Although there should not be any requests blocked on this queue it | |
702 | * can not hurt to be paranoid and try to wake up requests that may | |
703 | * haven been blocked when more than 50 at time were on the wire to the | |
704 | * same server - they now will see the session is in exit state and get | |
705 | * out of SendReceive. | |
706 | */ | |
707 | wake_up_all(&server->request_q); | |
708 | /* give those requests time to exit */ | |
709 | msleep(125); | |
bce9ce7c LL |
710 | if (cifs_rdma_enabled(server) && server->smbd_conn) { |
711 | smbd_destroy(server->smbd_conn); | |
712 | server->smbd_conn = NULL; | |
713 | } | |
762dfd10 PS |
714 | if (server->ssocket) { |
715 | sock_release(server->ssocket); | |
716 | server->ssocket = NULL; | |
717 | } | |
718 | ||
719 | if (!list_empty(&server->pending_mid_q)) { | |
720 | struct list_head dispose_list; | |
721 | struct mid_q_entry *mid_entry; | |
722 | struct list_head *tmp, *tmp2; | |
723 | ||
724 | INIT_LIST_HEAD(&dispose_list); | |
725 | spin_lock(&GlobalMid_Lock); | |
726 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { | |
727 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
f96637be | 728 | cifs_dbg(FYI, "Clearing mid 0x%llx\n", mid_entry->mid); |
7c9421e1 | 729 | mid_entry->mid_state = MID_SHUTDOWN; |
762dfd10 PS |
730 | list_move(&mid_entry->qhead, &dispose_list); |
731 | } | |
732 | spin_unlock(&GlobalMid_Lock); | |
733 | ||
734 | /* now walk dispose list and issue callbacks */ | |
735 | list_for_each_safe(tmp, tmp2, &dispose_list) { | |
736 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
f96637be | 737 | cifs_dbg(FYI, "Callback mid 0x%llx\n", mid_entry->mid); |
762dfd10 PS |
738 | list_del_init(&mid_entry->qhead); |
739 | mid_entry->callback(mid_entry); | |
740 | } | |
741 | /* 1/8th of sec is more than enough time for them to exit */ | |
742 | msleep(125); | |
743 | } | |
744 | ||
745 | if (!list_empty(&server->pending_mid_q)) { | |
746 | /* | |
747 | * mpx threads have not exited yet give them at least the smb | |
748 | * send timeout time for long ops. | |
749 | * | |
750 | * Due to delays on oplock break requests, we need to wait at | |
751 | * least 45 seconds before giving up on a request getting a | |
752 | * response and going ahead and killing cifsd. | |
753 | */ | |
f96637be | 754 | cifs_dbg(FYI, "Wait for exit from demultiplex thread\n"); |
762dfd10 PS |
755 | msleep(46000); |
756 | /* | |
757 | * If threads still have not exited they are probably never | |
758 | * coming home not much else we can do but free the memory. | |
759 | */ | |
760 | } | |
761 | ||
762 | kfree(server->hostname); | |
763 | kfree(server); | |
764 | ||
765 | length = atomic_dec_return(&tcpSesAllocCount); | |
766 | if (length > 0) | |
11d83360 | 767 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv); |
762dfd10 PS |
768 | } |
769 | ||
e9097ab4 JL |
770 | static int |
771 | standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
772 | { | |
773 | int length; | |
774 | char *buf = server->smallbuf; | |
2e96467d | 775 | unsigned int pdu_length = server->pdu_size; |
e9097ab4 JL |
776 | |
777 | /* make sure this will fit in a large buffer */ | |
93012bf9 RS |
778 | if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - |
779 | server->vals->header_preamble_size) { | |
f96637be | 780 | cifs_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length); |
e9097ab4 JL |
781 | cifs_reconnect(server); |
782 | wake_up(&server->response_q); | |
3fabaa27 | 783 | return -ECONNABORTED; |
e9097ab4 JL |
784 | } |
785 | ||
786 | /* switch to large buffer if too big for a small one */ | |
787 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { | |
788 | server->large_buf = true; | |
d4e4854f | 789 | memcpy(server->bigbuf, buf, server->total_read); |
e9097ab4 | 790 | buf = server->bigbuf; |
e9097ab4 JL |
791 | } |
792 | ||
793 | /* now read the rest */ | |
1887f601 | 794 | length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, |
93012bf9 RS |
795 | pdu_length - HEADER_SIZE(server) + 1 |
796 | + server->vals->header_preamble_size); | |
797 | ||
e9097ab4 JL |
798 | if (length < 0) |
799 | return length; | |
800 | server->total_read += length; | |
801 | ||
d4e4854f | 802 | dump_smb(buf, server->total_read); |
e9097ab4 | 803 | |
4326ed2f PS |
804 | return cifs_handle_standard(server, mid); |
805 | } | |
806 | ||
807 | int | |
808 | cifs_handle_standard(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
809 | { | |
810 | char *buf = server->large_buf ? server->bigbuf : server->smallbuf; | |
811 | int length; | |
812 | ||
e9097ab4 JL |
813 | /* |
814 | * We know that we received enough to get to the MID as we | |
815 | * checked the pdu_length earlier. Now check to see | |
816 | * if the rest of the header is OK. We borrow the length | |
817 | * var for the rest of the loop to avoid a new stack var. | |
818 | * | |
819 | * 48 bytes is enough to display the header and a little bit | |
820 | * into the payload for debugging purposes. | |
821 | */ | |
373512ec | 822 | length = server->ops->check_message(buf, server->total_read, server); |
e9097ab4 JL |
823 | if (length != 0) |
824 | cifs_dump_mem("Bad SMB: ", buf, | |
825 | min_t(unsigned int, server->total_read, 48)); | |
826 | ||
511c54a2 PS |
827 | if (server->ops->is_session_expired && |
828 | server->ops->is_session_expired(buf)) { | |
829 | cifs_reconnect(server); | |
830 | wake_up(&server->response_q); | |
831 | return -1; | |
832 | } | |
833 | ||
2e44b288 PS |
834 | if (server->ops->is_status_pending && |
835 | server->ops->is_status_pending(buf, server, length)) | |
836 | return -1; | |
837 | ||
ff4fa4a2 JL |
838 | if (!mid) |
839 | return length; | |
e9097ab4 | 840 | |
d4e4854f | 841 | handle_mid(mid, server, buf, length); |
ff4fa4a2 | 842 | return 0; |
e9097ab4 JL |
843 | } |
844 | ||
1da177e4 | 845 | static int |
7c97c200 | 846 | cifs_demultiplex_thread(void *p) |
1da177e4 LT |
847 | { |
848 | int length; | |
7c97c200 | 849 | struct TCP_Server_Info *server = p; |
2a37ef94 JL |
850 | unsigned int pdu_length; |
851 | char *buf = NULL; | |
a5c3e1c7 | 852 | struct task_struct *task_to_wake = NULL; |
1da177e4 | 853 | struct mid_q_entry *mid_entry; |
1da177e4 | 854 | |
1da177e4 | 855 | current->flags |= PF_MEMALLOC; |
f96637be | 856 | cifs_dbg(FYI, "Demultiplex PID: %d\n", task_pid_nr(current)); |
93d0ec85 JL |
857 | |
858 | length = atomic_inc_return(&tcpSesAllocCount); | |
859 | if (length > 1) | |
11d83360 | 860 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv); |
1da177e4 | 861 | |
83144186 | 862 | set_freezable(); |
469ee614 | 863 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
864 | if (try_to_freeze()) |
865 | continue; | |
b8643e1b | 866 | |
2a37ef94 | 867 | if (!allocate_buffers(server)) |
3d9c2472 | 868 | continue; |
b8643e1b | 869 | |
2a37ef94 | 870 | server->large_buf = false; |
2a37ef94 | 871 | buf = server->smallbuf; |
f01d5e14 | 872 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 873 | |
e28bc5b1 | 874 | length = cifs_read_from_socket(server, buf, pdu_length); |
a52c1eb7 | 875 | if (length < 0) |
1da177e4 | 876 | continue; |
2a37ef94 | 877 | server->total_read = length; |
1da177e4 | 878 | |
98bac62c PS |
879 | /* |
880 | * The right amount was read from socket - 4 bytes, | |
881 | * so we can now interpret the length field. | |
882 | */ | |
d4e4854f | 883 | pdu_length = get_rfc1002_length(buf); |
2e96467d | 884 | server->pdu_size = pdu_length; |
70ca734a | 885 | |
f96637be | 886 | cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length); |
fe11e4cc | 887 | if (!is_smb_response(server, buf[0])) |
fb8c4b14 | 888 | continue; |
e4eb295d | 889 | |
89482a56 | 890 | /* make sure we have enough to get to the MID */ |
93012bf9 RS |
891 | if (pdu_length < HEADER_SIZE(server) - 1 - |
892 | server->vals->header_preamble_size) { | |
f96637be JP |
893 | cifs_dbg(VFS, "SMB response too short (%u bytes)\n", |
894 | pdu_length); | |
89482a56 JL |
895 | cifs_reconnect(server); |
896 | wake_up(&server->response_q); | |
897 | continue; | |
e4eb295d | 898 | } |
e7015fb1 | 899 | |
89482a56 | 900 | /* read down to the MID */ |
93012bf9 RS |
901 | length = cifs_read_from_socket(server, |
902 | buf + server->vals->header_preamble_size, | |
903 | HEADER_SIZE(server) - 1 | |
904 | - server->vals->header_preamble_size); | |
89482a56 | 905 | if (length < 0) |
e4eb295d | 906 | continue; |
2a37ef94 | 907 | server->total_read += length; |
1da177e4 | 908 | |
9bb17e09 PS |
909 | if (server->ops->is_transform_hdr && |
910 | server->ops->receive_transform && | |
911 | server->ops->is_transform_hdr(buf)) { | |
912 | length = server->ops->receive_transform(server, | |
913 | &mid_entry); | |
914 | } else { | |
915 | mid_entry = server->ops->find_mid(server, buf); | |
50c2f753 | 916 | |
9bb17e09 PS |
917 | if (!mid_entry || !mid_entry->receive) |
918 | length = standard_receive3(server, mid_entry); | |
919 | else | |
920 | length = mid_entry->receive(server, mid_entry); | |
921 | } | |
71823baf | 922 | |
e9097ab4 | 923 | if (length < 0) |
fe11e4cc | 924 | continue; |
1da177e4 | 925 | |
d4e4854f | 926 | if (server->large_buf) |
2a37ef94 | 927 | buf = server->bigbuf; |
fda35943 | 928 | |
fda35943 | 929 | server->lstrp = jiffies; |
2b84a36c | 930 | if (mid_entry != NULL) { |
e19b2bc0 | 931 | mid_entry->resp_buf_size = server->pdu_size; |
38bd4906 SP |
932 | if ((mid_entry->mid_flags & MID_WAIT_CANCELLED) && |
933 | mid_entry->mid_state == MID_RESPONSE_RECEIVED && | |
934 | server->ops->handle_cancelled_mid) | |
935 | server->ops->handle_cancelled_mid( | |
936 | mid_entry->resp_buf, | |
937 | server); | |
938 | ||
2a37ef94 JL |
939 | if (!mid_entry->multiRsp || mid_entry->multiEnd) |
940 | mid_entry->callback(mid_entry); | |
38bd4906 SP |
941 | } else if (server->ops->is_oplock_break && |
942 | server->ops->is_oplock_break(buf, server)) { | |
943 | cifs_dbg(FYI, "Received oplock break\n"); | |
944 | } else { | |
f96637be JP |
945 | cifs_dbg(VFS, "No task to wake, unknown frame received! NumMids %d\n", |
946 | atomic_read(&midCount)); | |
1887f601 PS |
947 | cifs_dump_mem("Received Data is: ", buf, |
948 | HEADER_SIZE(server)); | |
3979877e | 949 | #ifdef CONFIG_CIFS_DEBUG2 |
7f0adb53 PS |
950 | if (server->ops->dump_detail) |
951 | server->ops->dump_detail(buf); | |
3979877e SF |
952 | cifs_dump_mids(server); |
953 | #endif /* CIFS_DEBUG2 */ | |
50c2f753 | 954 | |
e4eb295d SF |
955 | } |
956 | } /* end while !EXITING */ | |
957 | ||
fd62cb7e | 958 | /* buffer usually freed in free_mid - need to free it here on exit */ |
2a37ef94 JL |
959 | cifs_buf_release(server->bigbuf); |
960 | if (server->smallbuf) /* no sense logging a debug message if NULL */ | |
961 | cifs_small_buf_release(server->smallbuf); | |
1da177e4 | 962 | |
a5c3e1c7 | 963 | task_to_wake = xchg(&server->tsk, NULL); |
762dfd10 | 964 | clean_demultiplex_info(server); |
a5c3e1c7 SF |
965 | |
966 | /* if server->tsk was NULL then wait for a signal before exiting */ | |
967 | if (!task_to_wake) { | |
968 | set_current_state(TASK_INTERRUPTIBLE); | |
969 | while (!signal_pending(current)) { | |
970 | schedule(); | |
971 | set_current_state(TASK_INTERRUPTIBLE); | |
972 | } | |
973 | set_current_state(TASK_RUNNING); | |
974 | } | |
975 | ||
0468a2cf | 976 | module_put_and_exit(0); |
1da177e4 LT |
977 | } |
978 | ||
c359cf3c JL |
979 | /* extract the host portion of the UNC string */ |
980 | static char * | |
981 | extract_hostname(const char *unc) | |
982 | { | |
983 | const char *src; | |
984 | char *dst, *delim; | |
985 | unsigned int len; | |
986 | ||
987 | /* skip double chars at beginning of string */ | |
988 | /* BB: check validity of these bytes? */ | |
989 | src = unc + 2; | |
990 | ||
991 | /* delimiter between hostname and sharename is always '\\' now */ | |
992 | delim = strchr(src, '\\'); | |
993 | if (!delim) | |
994 | return ERR_PTR(-EINVAL); | |
995 | ||
996 | len = delim - src; | |
997 | dst = kmalloc((len + 1), GFP_KERNEL); | |
998 | if (dst == NULL) | |
999 | return ERR_PTR(-ENOMEM); | |
1000 | ||
1001 | memcpy(dst, src, len); | |
1002 | dst[len] = '\0'; | |
1003 | ||
1004 | return dst; | |
1005 | } | |
1006 | ||
8830d7e0 SP |
1007 | static int get_option_ul(substring_t args[], unsigned long *option) |
1008 | { | |
1009 | int rc; | |
1010 | char *string; | |
1011 | ||
1012 | string = match_strdup(args); | |
1013 | if (string == NULL) | |
1014 | return -ENOMEM; | |
bfa890a3 | 1015 | rc = kstrtoul(string, 0, option); |
8830d7e0 SP |
1016 | kfree(string); |
1017 | ||
1018 | return rc; | |
1019 | } | |
1020 | ||
3da46565 EB |
1021 | static int get_option_uid(substring_t args[], kuid_t *result) |
1022 | { | |
1023 | unsigned long value; | |
1024 | kuid_t uid; | |
1025 | int rc; | |
1026 | ||
1027 | rc = get_option_ul(args, &value); | |
1028 | if (rc) | |
1029 | return rc; | |
1030 | ||
1031 | uid = make_kuid(current_user_ns(), value); | |
1032 | if (!uid_valid(uid)) | |
1033 | return -EINVAL; | |
1034 | ||
1035 | *result = uid; | |
1036 | return 0; | |
1037 | } | |
1038 | ||
1039 | static int get_option_gid(substring_t args[], kgid_t *result) | |
1040 | { | |
1041 | unsigned long value; | |
1042 | kgid_t gid; | |
1043 | int rc; | |
1044 | ||
1045 | rc = get_option_ul(args, &value); | |
1046 | if (rc) | |
1047 | return rc; | |
1048 | ||
1049 | gid = make_kgid(current_user_ns(), value); | |
1050 | if (!gid_valid(gid)) | |
1051 | return -EINVAL; | |
1052 | ||
1053 | *result = gid; | |
1054 | return 0; | |
1055 | } | |
8830d7e0 SP |
1056 | |
1057 | static int cifs_parse_security_flavors(char *value, | |
1058 | struct smb_vol *vol) | |
1059 | { | |
1060 | ||
1061 | substring_t args[MAX_OPT_ARGS]; | |
1062 | ||
1e3cc57e JL |
1063 | /* |
1064 | * With mount options, the last one should win. Reset any existing | |
1065 | * settings back to default. | |
1066 | */ | |
1067 | vol->sectype = Unspecified; | |
1068 | vol->sign = false; | |
1069 | ||
8830d7e0 | 1070 | switch (match_token(value, cifs_secflavor_tokens, args)) { |
3f618223 JL |
1071 | case Opt_sec_krb5p: |
1072 | cifs_dbg(VFS, "sec=krb5p is not supported!\n"); | |
1073 | return 1; | |
1074 | case Opt_sec_krb5i: | |
1075 | vol->sign = true; | |
1076 | /* Fallthrough */ | |
8830d7e0 | 1077 | case Opt_sec_krb5: |
1e3cc57e | 1078 | vol->sectype = Kerberos; |
8830d7e0 | 1079 | break; |
3f618223 | 1080 | case Opt_sec_ntlmsspi: |
1e3cc57e | 1081 | vol->sign = true; |
3f618223 | 1082 | /* Fallthrough */ |
8830d7e0 | 1083 | case Opt_sec_ntlmssp: |
1e3cc57e | 1084 | vol->sectype = RawNTLMSSP; |
8830d7e0 | 1085 | break; |
3f618223 | 1086 | case Opt_sec_ntlmi: |
1e3cc57e | 1087 | vol->sign = true; |
3f618223 | 1088 | /* Fallthrough */ |
8830d7e0 | 1089 | case Opt_ntlm: |
1e3cc57e | 1090 | vol->sectype = NTLM; |
8830d7e0 | 1091 | break; |
3f618223 | 1092 | case Opt_sec_ntlmv2i: |
1e3cc57e | 1093 | vol->sign = true; |
3f618223 | 1094 | /* Fallthrough */ |
7659624f | 1095 | case Opt_sec_ntlmv2: |
1e3cc57e | 1096 | vol->sectype = NTLMv2; |
8830d7e0 SP |
1097 | break; |
1098 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
1099 | case Opt_sec_lanman: | |
1e3cc57e | 1100 | vol->sectype = LANMAN; |
8830d7e0 SP |
1101 | break; |
1102 | #endif | |
1103 | case Opt_sec_none: | |
1104 | vol->nullauth = 1; | |
1105 | break; | |
1106 | default: | |
f96637be | 1107 | cifs_dbg(VFS, "bad security option: %s\n", value); |
8830d7e0 SP |
1108 | return 1; |
1109 | } | |
1110 | ||
1111 | return 0; | |
1112 | } | |
1113 | ||
15b6a473 JL |
1114 | static int |
1115 | cifs_parse_cache_flavor(char *value, struct smb_vol *vol) | |
1116 | { | |
1117 | substring_t args[MAX_OPT_ARGS]; | |
1118 | ||
1119 | switch (match_token(value, cifs_cacheflavor_tokens, args)) { | |
1120 | case Opt_cache_loose: | |
1121 | vol->direct_io = false; | |
1122 | vol->strict_io = false; | |
1123 | break; | |
1124 | case Opt_cache_strict: | |
1125 | vol->direct_io = false; | |
1126 | vol->strict_io = true; | |
1127 | break; | |
1128 | case Opt_cache_none: | |
1129 | vol->direct_io = true; | |
1130 | vol->strict_io = false; | |
1131 | break; | |
1132 | default: | |
f96637be | 1133 | cifs_dbg(VFS, "bad cache= option: %s\n", value); |
15b6a473 JL |
1134 | return 1; |
1135 | } | |
1136 | return 0; | |
1137 | } | |
1138 | ||
23db65f5 JL |
1139 | static int |
1140 | cifs_parse_smb_version(char *value, struct smb_vol *vol) | |
1141 | { | |
1142 | substring_t args[MAX_OPT_ARGS]; | |
1143 | ||
1144 | switch (match_token(value, cifs_smb_version_tokens, args)) { | |
1145 | case Smb_1: | |
1146 | vol->ops = &smb1_operations; | |
1147 | vol->vals = &smb1_values; | |
1148 | break; | |
dd446b16 | 1149 | case Smb_20: |
53ef1016 | 1150 | vol->ops = &smb20_operations; |
dd446b16 SF |
1151 | vol->vals = &smb20_values; |
1152 | break; | |
1080ef75 SF |
1153 | case Smb_21: |
1154 | vol->ops = &smb21_operations; | |
1155 | vol->vals = &smb21_values; | |
1156 | break; | |
e4aa25e7 | 1157 | case Smb_30: |
38107d45 | 1158 | vol->ops = &smb30_operations; |
e4aa25e7 SF |
1159 | vol->vals = &smb30_values; |
1160 | break; | |
20b6d8b4 SF |
1161 | case Smb_302: |
1162 | vol->ops = &smb30_operations; /* currently identical with 3.0 */ | |
1163 | vol->vals = &smb302_values; | |
1164 | break; | |
5f7fbf73 SF |
1165 | #ifdef CONFIG_CIFS_SMB311 |
1166 | case Smb_311: | |
aab1893d | 1167 | vol->ops = &smb311_operations; |
5f7fbf73 SF |
1168 | vol->vals = &smb311_values; |
1169 | break; | |
1170 | #endif /* SMB311 */ | |
9764c02f SF |
1171 | case Smb_3any: |
1172 | vol->ops = &smb30_operations; /* currently identical with 3.0 */ | |
1173 | vol->vals = &smb3any_values; | |
1174 | break; | |
1175 | case Smb_default: | |
1176 | vol->ops = &smb30_operations; /* currently identical with 3.0 */ | |
1177 | vol->vals = &smbdefault_values; | |
1178 | break; | |
23db65f5 | 1179 | default: |
f96637be | 1180 | cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value); |
23db65f5 JL |
1181 | return 1; |
1182 | } | |
1183 | return 0; | |
1184 | } | |
1185 | ||
d387a5c5 JL |
1186 | /* |
1187 | * Parse a devname into substrings and populate the vol->UNC and vol->prepath | |
1188 | * fields with the result. Returns 0 on success and an error otherwise. | |
1189 | */ | |
1190 | static int | |
1191 | cifs_parse_devname(const char *devname, struct smb_vol *vol) | |
1192 | { | |
1193 | char *pos; | |
1194 | const char *delims = "/\\"; | |
1195 | size_t len; | |
1196 | ||
1197 | /* make sure we have a valid UNC double delimiter prefix */ | |
1198 | len = strspn(devname, delims); | |
1199 | if (len != 2) | |
1200 | return -EINVAL; | |
1201 | ||
1202 | /* find delimiter between host and sharename */ | |
1203 | pos = strpbrk(devname + 2, delims); | |
1204 | if (!pos) | |
1205 | return -EINVAL; | |
1206 | ||
1207 | /* skip past delimiter */ | |
1208 | ++pos; | |
1209 | ||
1210 | /* now go until next delimiter or end of string */ | |
1211 | len = strcspn(pos, delims); | |
1212 | ||
1213 | /* move "pos" up to delimiter or NULL */ | |
1214 | pos += len; | |
1215 | vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL); | |
1216 | if (!vol->UNC) | |
1217 | return -ENOMEM; | |
1218 | ||
1219 | convert_delimiter(vol->UNC, '\\'); | |
1220 | ||
11e31647 SP |
1221 | /* skip any delimiter */ |
1222 | if (*pos == '/' || *pos == '\\') | |
1223 | pos++; | |
1224 | ||
1225 | /* If pos is NULL then no prepath */ | |
1226 | if (!*pos) | |
d387a5c5 JL |
1227 | return 0; |
1228 | ||
1229 | vol->prepath = kstrdup(pos, GFP_KERNEL); | |
1230 | if (!vol->prepath) | |
1231 | return -ENOMEM; | |
1232 | ||
1233 | return 0; | |
1234 | } | |
1235 | ||
1da177e4 | 1236 | static int |
b946845a | 1237 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
50c2f753 | 1238 | struct smb_vol *vol) |
1da177e4 | 1239 | { |
8830d7e0 | 1240 | char *data, *end; |
957df453 | 1241 | char *mountdata_copy = NULL, *options; |
1da177e4 LT |
1242 | unsigned int temp_len, i, j; |
1243 | char separator[2]; | |
9b9d6b24 JL |
1244 | short int override_uid = -1; |
1245 | short int override_gid = -1; | |
1246 | bool uid_specified = false; | |
1247 | bool gid_specified = false; | |
d8162558 JL |
1248 | bool sloppy = false; |
1249 | char *invalid = NULL; | |
88463999 | 1250 | char *nodename = utsname()->nodename; |
8830d7e0 SP |
1251 | char *string = NULL; |
1252 | char *tmp_end, *value; | |
1253 | char delim; | |
b979aaa1 | 1254 | bool got_ip = false; |
7e682f76 | 1255 | bool got_version = false; |
b979aaa1 JL |
1256 | unsigned short port = 0; |
1257 | struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr; | |
1da177e4 LT |
1258 | |
1259 | separator[0] = ','; | |
50c2f753 | 1260 | separator[1] = 0; |
8830d7e0 | 1261 | delim = separator[0]; |
1da177e4 | 1262 | |
6ee9542a JL |
1263 | /* ensure we always start with zeroed-out smb_vol */ |
1264 | memset(vol, 0, sizeof(*vol)); | |
1265 | ||
88463999 JL |
1266 | /* |
1267 | * does not have to be perfect mapping since field is | |
1268 | * informational, only used for servers that do not support | |
1269 | * port 445 and it can be overridden at mount time | |
1270 | */ | |
1397f2ee JL |
1271 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
1272 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
1273 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
1274 | ||
1397f2ee | 1275 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
1276 | /* null target name indicates to use *SMBSERVR default called name |
1277 | if we end up sending RFC1001 session initialize */ | |
1278 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
1279 | vol->cred_uid = current_uid(); |
1280 | vol->linux_uid = current_uid(); | |
a001e5b5 | 1281 | vol->linux_gid = current_gid(); |
f55ed1a8 | 1282 | |
2baa2682 SF |
1283 | /* |
1284 | * default to SFM style remapping of seven reserved characters | |
1285 | * unless user overrides it or we negotiate CIFS POSIX where | |
1286 | * it is unnecessary. Can not simultaneously use more than one mapping | |
1287 | * since then readdir could list files that open could not open | |
1288 | */ | |
1289 | vol->remap = true; | |
1290 | ||
f55ed1a8 JL |
1291 | /* default to only allowing write access to owner of the mount */ |
1292 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
1293 | |
1294 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
1295 | /* default is always to request posix paths. */ |
1296 | vol->posix_paths = 1; | |
a0c9217f JL |
1297 | /* default to using server inode numbers where available */ |
1298 | vol->server_ino = 1; | |
ac67055e | 1299 | |
1b359204 JL |
1300 | /* default is to use strict cifs caching semantics */ |
1301 | vol->strict_io = true; | |
1302 | ||
6d20e840 SJ |
1303 | vol->actimeo = CIFS_DEF_ACTIMEO; |
1304 | ||
9764c02f SF |
1305 | /* offer SMB2.1 and later (SMB3 etc). Secure and widely accepted */ |
1306 | vol->ops = &smb30_operations; | |
1307 | vol->vals = &smbdefault_values; | |
23db65f5 | 1308 | |
b782fcc1 RV |
1309 | vol->echo_interval = SMB_ECHO_INTERVAL_DEFAULT; |
1310 | ||
b946845a SF |
1311 | if (!mountdata) |
1312 | goto cifs_parse_mount_err; | |
1313 | ||
1314 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); | |
1315 | if (!mountdata_copy) | |
1316 | goto cifs_parse_mount_err; | |
1da177e4 | 1317 | |
b946845a | 1318 | options = mountdata_copy; |
4906e50b | 1319 | end = options + strlen(options); |
8830d7e0 | 1320 | |
50c2f753 | 1321 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 1322 | if (options[4] != 0) { |
1da177e4 LT |
1323 | separator[0] = options[4]; |
1324 | options += 5; | |
1325 | } else { | |
f96637be | 1326 | cifs_dbg(FYI, "Null separator not allowed\n"); |
1da177e4 LT |
1327 | } |
1328 | } | |
3d3ea8e6 SP |
1329 | vol->backupuid_specified = false; /* no backup intent for a user */ |
1330 | vol->backupgid_specified = false; /* no backup intent for a group */ | |
50c2f753 | 1331 | |
37d4f99b JL |
1332 | switch (cifs_parse_devname(devname, vol)) { |
1333 | case 0: | |
1334 | break; | |
1335 | case -ENOMEM: | |
1336 | cifs_dbg(VFS, "Unable to allocate memory for devname.\n"); | |
1337 | goto cifs_parse_mount_err; | |
1338 | case -EINVAL: | |
1339 | cifs_dbg(VFS, "Malformed UNC in devname.\n"); | |
1340 | goto cifs_parse_mount_err; | |
1341 | default: | |
1342 | cifs_dbg(VFS, "Unknown error parsing devname.\n"); | |
1343 | goto cifs_parse_mount_err; | |
d387a5c5 JL |
1344 | } |
1345 | ||
1da177e4 | 1346 | while ((data = strsep(&options, separator)) != NULL) { |
8830d7e0 SP |
1347 | substring_t args[MAX_OPT_ARGS]; |
1348 | unsigned long option; | |
1349 | int token; | |
1350 | ||
1da177e4 LT |
1351 | if (!*data) |
1352 | continue; | |
1da177e4 | 1353 | |
8830d7e0 SP |
1354 | token = match_token(data, cifs_mount_option_tokens, args); |
1355 | ||
1356 | switch (token) { | |
1357 | ||
1358 | /* Ingnore the following */ | |
1359 | case Opt_ignore: | |
1360 | break; | |
1361 | ||
1362 | /* Boolean values */ | |
1363 | case Opt_user_xattr: | |
1da177e4 | 1364 | vol->no_xattr = 0; |
8830d7e0 SP |
1365 | break; |
1366 | case Opt_nouser_xattr: | |
1da177e4 | 1367 | vol->no_xattr = 1; |
8830d7e0 SP |
1368 | break; |
1369 | case Opt_forceuid: | |
9b9d6b24 | 1370 | override_uid = 1; |
8830d7e0 SP |
1371 | break; |
1372 | case Opt_noforceuid: | |
9b9d6b24 | 1373 | override_uid = 0; |
8830d7e0 | 1374 | break; |
72bd481f JL |
1375 | case Opt_forcegid: |
1376 | override_gid = 1; | |
1377 | break; | |
1378 | case Opt_noforcegid: | |
1379 | override_gid = 0; | |
1380 | break; | |
8830d7e0 | 1381 | case Opt_noblocksend: |
edf1ae40 | 1382 | vol->noblocksnd = 1; |
8830d7e0 SP |
1383 | break; |
1384 | case Opt_noautotune: | |
edf1ae40 | 1385 | vol->noautotune = 1; |
8830d7e0 SP |
1386 | break; |
1387 | case Opt_hard: | |
1da177e4 | 1388 | vol->retry = 1; |
8830d7e0 SP |
1389 | break; |
1390 | case Opt_soft: | |
1da177e4 | 1391 | vol->retry = 0; |
8830d7e0 SP |
1392 | break; |
1393 | case Opt_perm: | |
1da177e4 | 1394 | vol->noperm = 0; |
8830d7e0 SP |
1395 | break; |
1396 | case Opt_noperm: | |
1da177e4 | 1397 | vol->noperm = 1; |
8830d7e0 SP |
1398 | break; |
1399 | case Opt_mapchars: | |
2baa2682 SF |
1400 | vol->sfu_remap = true; |
1401 | vol->remap = false; /* disable SFM mapping */ | |
8830d7e0 SP |
1402 | break; |
1403 | case Opt_nomapchars: | |
2baa2682 SF |
1404 | vol->sfu_remap = false; |
1405 | break; | |
1406 | case Opt_mapposix: | |
1407 | vol->remap = true; | |
1408 | vol->sfu_remap = false; /* disable SFU mapping */ | |
1409 | break; | |
1410 | case Opt_nomapposix: | |
1411 | vol->remap = false; | |
8830d7e0 SP |
1412 | break; |
1413 | case Opt_sfu: | |
50c2f753 | 1414 | vol->sfu_emul = 1; |
8830d7e0 SP |
1415 | break; |
1416 | case Opt_nosfu: | |
50c2f753 | 1417 | vol->sfu_emul = 0; |
8830d7e0 SP |
1418 | break; |
1419 | case Opt_nodfs: | |
2c1b8615 | 1420 | vol->nodfs = 1; |
8830d7e0 SP |
1421 | break; |
1422 | case Opt_posixpaths: | |
ac67055e | 1423 | vol->posix_paths = 1; |
8830d7e0 SP |
1424 | break; |
1425 | case Opt_noposixpaths: | |
ac67055e | 1426 | vol->posix_paths = 0; |
8830d7e0 SP |
1427 | break; |
1428 | case Opt_nounix: | |
c18c842b | 1429 | vol->no_linux_ext = 1; |
8830d7e0 SP |
1430 | break; |
1431 | case Opt_nocase: | |
50c2f753 | 1432 | vol->nocase = 1; |
8830d7e0 SP |
1433 | break; |
1434 | case Opt_brl: | |
c46fa8ac | 1435 | vol->nobrl = 0; |
8830d7e0 SP |
1436 | break; |
1437 | case Opt_nobrl: | |
c46fa8ac | 1438 | vol->nobrl = 1; |
5cfdddcf PS |
1439 | /* |
1440 | * turn off mandatory locking in mode | |
8830d7e0 | 1441 | * if remote locking is turned off since the |
5cfdddcf PS |
1442 | * local vfs will do advisory |
1443 | */ | |
50c2f753 SF |
1444 | if (vol->file_mode == |
1445 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1446 | vol->file_mode = S_IALLUGO; |
8830d7e0 SP |
1447 | break; |
1448 | case Opt_forcemandatorylock: | |
13a6e42a | 1449 | vol->mand_lock = 1; |
8830d7e0 SP |
1450 | break; |
1451 | case Opt_setuids: | |
1da177e4 | 1452 | vol->setuids = 1; |
8830d7e0 SP |
1453 | break; |
1454 | case Opt_nosetuids: | |
1da177e4 | 1455 | vol->setuids = 0; |
8830d7e0 | 1456 | break; |
95932655 SF |
1457 | case Opt_setuidfromacl: |
1458 | vol->setuidfromacl = 1; | |
1459 | break; | |
8830d7e0 | 1460 | case Opt_dynperm: |
d0a9c078 | 1461 | vol->dynperm = true; |
8830d7e0 SP |
1462 | break; |
1463 | case Opt_nodynperm: | |
d0a9c078 | 1464 | vol->dynperm = false; |
8830d7e0 SP |
1465 | break; |
1466 | case Opt_nohard: | |
1da177e4 | 1467 | vol->retry = 0; |
8830d7e0 SP |
1468 | break; |
1469 | case Opt_nosoft: | |
1da177e4 | 1470 | vol->retry = 1; |
8830d7e0 SP |
1471 | break; |
1472 | case Opt_nointr: | |
1da177e4 | 1473 | vol->intr = 0; |
8830d7e0 SP |
1474 | break; |
1475 | case Opt_intr: | |
1da177e4 | 1476 | vol->intr = 1; |
8830d7e0 SP |
1477 | break; |
1478 | case Opt_nostrictsync: | |
be652445 | 1479 | vol->nostrictsync = 1; |
8830d7e0 SP |
1480 | break; |
1481 | case Opt_strictsync: | |
be652445 | 1482 | vol->nostrictsync = 0; |
8830d7e0 SP |
1483 | break; |
1484 | case Opt_serverino: | |
1da177e4 | 1485 | vol->server_ino = 1; |
8830d7e0 SP |
1486 | break; |
1487 | case Opt_noserverino: | |
1da177e4 | 1488 | vol->server_ino = 0; |
8830d7e0 SP |
1489 | break; |
1490 | case Opt_rwpidforward: | |
d4ffff1f | 1491 | vol->rwpidforward = 1; |
8830d7e0 SP |
1492 | break; |
1493 | case Opt_cifsacl: | |
0a4b92c0 | 1494 | vol->cifs_acl = 1; |
8830d7e0 SP |
1495 | break; |
1496 | case Opt_nocifsacl: | |
0a4b92c0 | 1497 | vol->cifs_acl = 0; |
8830d7e0 SP |
1498 | break; |
1499 | case Opt_acl: | |
1da177e4 | 1500 | vol->no_psx_acl = 0; |
8830d7e0 SP |
1501 | break; |
1502 | case Opt_noacl: | |
1da177e4 | 1503 | vol->no_psx_acl = 1; |
8830d7e0 SP |
1504 | break; |
1505 | case Opt_locallease: | |
84210e91 | 1506 | vol->local_lease = 1; |
8830d7e0 SP |
1507 | break; |
1508 | case Opt_sign: | |
1e3cc57e | 1509 | vol->sign = true; |
8830d7e0 SP |
1510 | break; |
1511 | case Opt_seal: | |
95b1cb90 | 1512 | /* we do not do the following in secFlags because seal |
8830d7e0 SP |
1513 | * is a per tree connection (mount) not a per socket |
1514 | * or per-smb connection option in the protocol | |
1515 | * vol->secFlg |= CIFSSEC_MUST_SEAL; | |
1516 | */ | |
95b1cb90 | 1517 | vol->seal = 1; |
8830d7e0 | 1518 | break; |
8830d7e0 | 1519 | case Opt_noac: |
0b456f04 | 1520 | pr_warn("CIFS: Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n"); |
8830d7e0 SP |
1521 | break; |
1522 | case Opt_fsc: | |
607a569d | 1523 | #ifndef CONFIG_CIFS_FSCACHE |
f96637be | 1524 | cifs_dbg(VFS, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n"); |
b946845a | 1525 | goto cifs_parse_mount_err; |
607a569d | 1526 | #endif |
fa1df75d | 1527 | vol->fsc = true; |
8830d7e0 SP |
1528 | break; |
1529 | case Opt_mfsymlinks: | |
736a3320 | 1530 | vol->mfsymlinks = true; |
8830d7e0 SP |
1531 | break; |
1532 | case Opt_multiuser: | |
0eb8a132 | 1533 | vol->multiuser = true; |
8830d7e0 | 1534 | break; |
d8162558 JL |
1535 | case Opt_sloppy: |
1536 | sloppy = true; | |
1537 | break; | |
a0b3df5c JL |
1538 | case Opt_nosharesock: |
1539 | vol->nosharesock = true; | |
1540 | break; | |
b2a30774 SF |
1541 | case Opt_nopersistent: |
1542 | vol->nopersistent = true; | |
1543 | if (vol->persistent) { | |
1544 | cifs_dbg(VFS, | |
1545 | "persistenthandles mount options conflict\n"); | |
1546 | goto cifs_parse_mount_err; | |
1547 | } | |
1548 | break; | |
1549 | case Opt_persistent: | |
1550 | vol->persistent = true; | |
592fafe6 | 1551 | if ((vol->nopersistent) || (vol->resilient)) { |
b2a30774 SF |
1552 | cifs_dbg(VFS, |
1553 | "persistenthandles mount options conflict\n"); | |
1554 | goto cifs_parse_mount_err; | |
1555 | } | |
1556 | break; | |
592fafe6 SF |
1557 | case Opt_resilient: |
1558 | vol->resilient = true; | |
1559 | if (vol->persistent) { | |
1560 | cifs_dbg(VFS, | |
1561 | "persistenthandles mount options conflict\n"); | |
1562 | goto cifs_parse_mount_err; | |
1563 | } | |
1564 | break; | |
1565 | case Opt_noresilient: | |
1566 | vol->resilient = false; /* already the default */ | |
1567 | break; | |
39566443 GP |
1568 | case Opt_domainauto: |
1569 | vol->domainauto = true; | |
1570 | break; | |
8339dd32 LL |
1571 | case Opt_rdma: |
1572 | vol->rdma = true; | |
1573 | break; | |
8830d7e0 SP |
1574 | |
1575 | /* Numeric Values */ | |
1576 | case Opt_backupuid: | |
3da46565 | 1577 | if (get_option_uid(args, &vol->backupuid)) { |
f96637be JP |
1578 | cifs_dbg(VFS, "%s: Invalid backupuid value\n", |
1579 | __func__); | |
3d3ea8e6 SP |
1580 | goto cifs_parse_mount_err; |
1581 | } | |
1582 | vol->backupuid_specified = true; | |
8830d7e0 SP |
1583 | break; |
1584 | case Opt_backupgid: | |
3da46565 | 1585 | if (get_option_gid(args, &vol->backupgid)) { |
f96637be JP |
1586 | cifs_dbg(VFS, "%s: Invalid backupgid value\n", |
1587 | __func__); | |
3d3ea8e6 SP |
1588 | goto cifs_parse_mount_err; |
1589 | } | |
1590 | vol->backupgid_specified = true; | |
8830d7e0 SP |
1591 | break; |
1592 | case Opt_uid: | |
3da46565 | 1593 | if (get_option_uid(args, &vol->linux_uid)) { |
f96637be JP |
1594 | cifs_dbg(VFS, "%s: Invalid uid value\n", |
1595 | __func__); | |
8830d7e0 SP |
1596 | goto cifs_parse_mount_err; |
1597 | } | |
8830d7e0 SP |
1598 | uid_specified = true; |
1599 | break; | |
1600 | case Opt_cruid: | |
3da46565 | 1601 | if (get_option_uid(args, &vol->cred_uid)) { |
f96637be JP |
1602 | cifs_dbg(VFS, "%s: Invalid cruid value\n", |
1603 | __func__); | |
8830d7e0 SP |
1604 | goto cifs_parse_mount_err; |
1605 | } | |
8830d7e0 SP |
1606 | break; |
1607 | case Opt_gid: | |
3da46565 | 1608 | if (get_option_gid(args, &vol->linux_gid)) { |
f96637be JP |
1609 | cifs_dbg(VFS, "%s: Invalid gid value\n", |
1610 | __func__); | |
8830d7e0 SP |
1611 | goto cifs_parse_mount_err; |
1612 | } | |
8830d7e0 SP |
1613 | gid_specified = true; |
1614 | break; | |
1615 | case Opt_file_mode: | |
1616 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1617 | cifs_dbg(VFS, "%s: Invalid file_mode value\n", |
1618 | __func__); | |
8830d7e0 SP |
1619 | goto cifs_parse_mount_err; |
1620 | } | |
1621 | vol->file_mode = option; | |
1622 | break; | |
1623 | case Opt_dirmode: | |
1624 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1625 | cifs_dbg(VFS, "%s: Invalid dir_mode value\n", |
1626 | __func__); | |
8830d7e0 SP |
1627 | goto cifs_parse_mount_err; |
1628 | } | |
1629 | vol->dir_mode = option; | |
1630 | break; | |
1631 | case Opt_port: | |
b979aaa1 JL |
1632 | if (get_option_ul(args, &option) || |
1633 | option > USHRT_MAX) { | |
f96637be JP |
1634 | cifs_dbg(VFS, "%s: Invalid port value\n", |
1635 | __func__); | |
8830d7e0 SP |
1636 | goto cifs_parse_mount_err; |
1637 | } | |
b979aaa1 | 1638 | port = (unsigned short)option; |
8830d7e0 SP |
1639 | break; |
1640 | case Opt_rsize: | |
1641 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1642 | cifs_dbg(VFS, "%s: Invalid rsize value\n", |
1643 | __func__); | |
b946845a | 1644 | goto cifs_parse_mount_err; |
8830d7e0 SP |
1645 | } |
1646 | vol->rsize = option; | |
1647 | break; | |
1648 | case Opt_wsize: | |
1649 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1650 | cifs_dbg(VFS, "%s: Invalid wsize value\n", |
1651 | __func__); | |
8830d7e0 SP |
1652 | goto cifs_parse_mount_err; |
1653 | } | |
1654 | vol->wsize = option; | |
1655 | break; | |
1656 | case Opt_actimeo: | |
1657 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1658 | cifs_dbg(VFS, "%s: Invalid actimeo value\n", |
1659 | __func__); | |
8830d7e0 SP |
1660 | goto cifs_parse_mount_err; |
1661 | } | |
1662 | vol->actimeo = HZ * option; | |
1663 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
f96637be | 1664 | cifs_dbg(VFS, "attribute cache timeout too large\n"); |
8830d7e0 SP |
1665 | goto cifs_parse_mount_err; |
1666 | } | |
1667 | break; | |
adfeb3e0 SF |
1668 | case Opt_echo_interval: |
1669 | if (get_option_ul(args, &option)) { | |
1670 | cifs_dbg(VFS, "%s: Invalid echo interval value\n", | |
1671 | __func__); | |
1672 | goto cifs_parse_mount_err; | |
1673 | } | |
1674 | vol->echo_interval = option; | |
1675 | break; | |
8b217fe7 SF |
1676 | case Opt_snapshot: |
1677 | if (get_option_ul(args, &option)) { | |
1678 | cifs_dbg(VFS, "%s: Invalid snapshot time\n", | |
1679 | __func__); | |
1680 | goto cifs_parse_mount_err; | |
1681 | } | |
1682 | vol->snapshot_time = option; | |
1683 | break; | |
141891f4 SF |
1684 | case Opt_max_credits: |
1685 | if (get_option_ul(args, &option) || (option < 20) || | |
1686 | (option > 60000)) { | |
1687 | cifs_dbg(VFS, "%s: Invalid max_credits value\n", | |
1688 | __func__); | |
1689 | goto cifs_parse_mount_err; | |
1690 | } | |
1691 | vol->max_credits = option; | |
1692 | break; | |
8830d7e0 SP |
1693 | |
1694 | /* String Arguments */ | |
1695 | ||
4fe9e963 SP |
1696 | case Opt_blank_user: |
1697 | /* null user, ie. anonymous authentication */ | |
1698 | vol->nullauth = 1; | |
1699 | vol->username = NULL; | |
1700 | break; | |
8830d7e0 SP |
1701 | case Opt_user: |
1702 | string = match_strdup(args); | |
1703 | if (string == NULL) | |
1704 | goto out_nomem; | |
1705 | ||
8c3a2b4c SL |
1706 | if (strnlen(string, CIFS_MAX_USERNAME_LEN) > |
1707 | CIFS_MAX_USERNAME_LEN) { | |
0b456f04 | 1708 | pr_warn("CIFS: username too long\n"); |
8830d7e0 SP |
1709 | goto cifs_parse_mount_err; |
1710 | } | |
2bd50fb3 TK |
1711 | |
1712 | kfree(vol->username); | |
8830d7e0 | 1713 | vol->username = kstrdup(string, GFP_KERNEL); |
f96637be | 1714 | if (!vol->username) |
8830d7e0 | 1715 | goto cifs_parse_mount_err; |
8830d7e0 SP |
1716 | break; |
1717 | case Opt_blank_pass: | |
8830d7e0 SP |
1718 | /* passwords have to be handled differently |
1719 | * to allow the character used for deliminator | |
1720 | * to be passed within them | |
1721 | */ | |
1722 | ||
c369c9a4 SP |
1723 | /* |
1724 | * Check if this is a case where the password | |
1725 | * starts with a delimiter | |
1726 | */ | |
1727 | tmp_end = strchr(data, '='); | |
1728 | tmp_end++; | |
1729 | if (!(tmp_end < end && tmp_end[1] == delim)) { | |
1730 | /* No it is not. Set the password to NULL */ | |
97f4b727 | 1731 | kzfree(vol->password); |
c369c9a4 SP |
1732 | vol->password = NULL; |
1733 | break; | |
1734 | } | |
1735 | /* Yes it is. Drop down to Opt_pass below.*/ | |
1736 | case Opt_pass: | |
8830d7e0 SP |
1737 | /* Obtain the value string */ |
1738 | value = strchr(data, '='); | |
10238074 | 1739 | value++; |
8830d7e0 SP |
1740 | |
1741 | /* Set tmp_end to end of the string */ | |
1742 | tmp_end = (char *) value + strlen(value); | |
1743 | ||
1744 | /* Check if following character is the deliminator | |
1745 | * If yes, we have encountered a double deliminator | |
1746 | * reset the NULL character to the deliminator | |
1747 | */ | |
e73f843a | 1748 | if (tmp_end < end && tmp_end[1] == delim) { |
8830d7e0 SP |
1749 | tmp_end[0] = delim; |
1750 | ||
e73f843a SJ |
1751 | /* Keep iterating until we get to a single |
1752 | * deliminator OR the end | |
1753 | */ | |
1754 | while ((tmp_end = strchr(tmp_end, delim)) | |
1755 | != NULL && (tmp_end[1] == delim)) { | |
1756 | tmp_end = (char *) &tmp_end[2]; | |
1757 | } | |
1758 | ||
1759 | /* Reset var options to point to next element */ | |
1760 | if (tmp_end) { | |
1761 | tmp_end[0] = '\0'; | |
1762 | options = (char *) &tmp_end[1]; | |
1763 | } else | |
1764 | /* Reached the end of the mount option | |
1765 | * string */ | |
1766 | options = end; | |
8830d7e0 SP |
1767 | } |
1768 | ||
97f4b727 | 1769 | kzfree(vol->password); |
8830d7e0 SP |
1770 | /* Now build new password string */ |
1771 | temp_len = strlen(value); | |
1772 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); | |
1773 | if (vol->password == NULL) { | |
0b456f04 | 1774 | pr_warn("CIFS: no memory for password\n"); |
8830d7e0 SP |
1775 | goto cifs_parse_mount_err; |
1776 | } | |
1777 | ||
1778 | for (i = 0, j = 0; i < temp_len; i++, j++) { | |
1779 | vol->password[j] = value[i]; | |
1780 | if ((value[i] == delim) && | |
1781 | value[i+1] == delim) | |
1782 | /* skip the second deliminator */ | |
1783 | i++; | |
1784 | } | |
1785 | vol->password[j] = '\0'; | |
1786 | break; | |
4fe9e963 | 1787 | case Opt_blank_ip: |
b979aaa1 JL |
1788 | /* FIXME: should this be an error instead? */ |
1789 | got_ip = false; | |
4fe9e963 | 1790 | break; |
8830d7e0 SP |
1791 | case Opt_ip: |
1792 | string = match_strdup(args); | |
1793 | if (string == NULL) | |
1794 | goto out_nomem; | |
1795 | ||
b979aaa1 JL |
1796 | if (!cifs_convert_address(dstaddr, string, |
1797 | strlen(string))) { | |
0b456f04 | 1798 | pr_err("CIFS: bad ip= option (%s).\n", string); |
8830d7e0 SP |
1799 | goto cifs_parse_mount_err; |
1800 | } | |
b979aaa1 | 1801 | got_ip = true; |
8830d7e0 | 1802 | break; |
8830d7e0 SP |
1803 | case Opt_domain: |
1804 | string = match_strdup(args); | |
1805 | if (string == NULL) | |
1806 | goto out_nomem; | |
1807 | ||
057d6332 CG |
1808 | if (strnlen(string, CIFS_MAX_DOMAINNAME_LEN) |
1809 | == CIFS_MAX_DOMAINNAME_LEN) { | |
0b456f04 | 1810 | pr_warn("CIFS: domain name too long\n"); |
8830d7e0 SP |
1811 | goto cifs_parse_mount_err; |
1812 | } | |
1813 | ||
2bd50fb3 | 1814 | kfree(vol->domainname); |
8830d7e0 SP |
1815 | vol->domainname = kstrdup(string, GFP_KERNEL); |
1816 | if (!vol->domainname) { | |
0b456f04 | 1817 | pr_warn("CIFS: no memory for domainname\n"); |
8830d7e0 SP |
1818 | goto cifs_parse_mount_err; |
1819 | } | |
f96637be | 1820 | cifs_dbg(FYI, "Domain name set\n"); |
8830d7e0 SP |
1821 | break; |
1822 | case Opt_srcaddr: | |
1823 | string = match_strdup(args); | |
1824 | if (string == NULL) | |
1825 | goto out_nomem; | |
1826 | ||
4fe9e963 | 1827 | if (!cifs_convert_address( |
8830d7e0 SP |
1828 | (struct sockaddr *)&vol->srcaddr, |
1829 | string, strlen(string))) { | |
0b456f04 AS |
1830 | pr_warn("CIFS: Could not parse srcaddr: %s\n", |
1831 | string); | |
8830d7e0 SP |
1832 | goto cifs_parse_mount_err; |
1833 | } | |
1834 | break; | |
8830d7e0 SP |
1835 | case Opt_iocharset: |
1836 | string = match_strdup(args); | |
1837 | if (string == NULL) | |
1838 | goto out_nomem; | |
1839 | ||
4fe9e963 | 1840 | if (strnlen(string, 1024) >= 65) { |
0b456f04 | 1841 | pr_warn("CIFS: iocharset name too long.\n"); |
8830d7e0 SP |
1842 | goto cifs_parse_mount_err; |
1843 | } | |
1844 | ||
87e747cd | 1845 | if (strncasecmp(string, "default", 7) != 0) { |
2bd50fb3 | 1846 | kfree(vol->iocharset); |
8830d7e0 SP |
1847 | vol->iocharset = kstrdup(string, |
1848 | GFP_KERNEL); | |
1849 | if (!vol->iocharset) { | |
0b456f04 | 1850 | pr_warn("CIFS: no memory for charset\n"); |
8830d7e0 SP |
1851 | goto cifs_parse_mount_err; |
1852 | } | |
1853 | } | |
1854 | /* if iocharset not set then load_nls_default | |
1855 | * is used by caller | |
1856 | */ | |
f96637be | 1857 | cifs_dbg(FYI, "iocharset set to %s\n", string); |
8830d7e0 | 1858 | break; |
8830d7e0 SP |
1859 | case Opt_netbiosname: |
1860 | string = match_strdup(args); | |
1861 | if (string == NULL) | |
1862 | goto out_nomem; | |
1863 | ||
8830d7e0 SP |
1864 | memset(vol->source_rfc1001_name, 0x20, |
1865 | RFC1001_NAME_LEN); | |
1866 | /* | |
1867 | * FIXME: are there cases in which a comma can | |
1868 | * be valid in workstation netbios name (and | |
1869 | * need special handling)? | |
1870 | */ | |
1871 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
1872 | /* don't ucase netbiosname for user */ | |
1873 | if (string[i] == 0) | |
1874 | break; | |
1875 | vol->source_rfc1001_name[i] = string[i]; | |
1876 | } | |
1877 | /* The string has 16th byte zero still from | |
1878 | * set at top of the function | |
1879 | */ | |
1880 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
0b456f04 | 1881 | pr_warn("CIFS: netbiosname longer than 15 truncated.\n"); |
8830d7e0 SP |
1882 | break; |
1883 | case Opt_servern: | |
1884 | /* servernetbiosname specified override *SMBSERVER */ | |
1885 | string = match_strdup(args); | |
1886 | if (string == NULL) | |
1887 | goto out_nomem; | |
1888 | ||
8830d7e0 SP |
1889 | /* last byte, type, is 0x20 for servr type */ |
1890 | memset(vol->target_rfc1001_name, 0x20, | |
1891 | RFC1001_NAME_LEN_WITH_NULL); | |
1892 | ||
1893 | /* BB are there cases in which a comma can be | |
1894 | valid in this workstation netbios name | |
1895 | (and need special handling)? */ | |
1896 | ||
1897 | /* user or mount helper must uppercase the | |
1898 | netbios name */ | |
1899 | for (i = 0; i < 15; i++) { | |
1900 | if (string[i] == 0) | |
1901 | break; | |
1902 | vol->target_rfc1001_name[i] = string[i]; | |
1903 | } | |
1904 | /* The string has 16th byte zero still from | |
1905 | set at top of the function */ | |
1906 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
0b456f04 | 1907 | pr_warn("CIFS: server netbiosname longer than 15 truncated.\n"); |
8830d7e0 SP |
1908 | break; |
1909 | case Opt_ver: | |
7e682f76 | 1910 | /* version of mount userspace tools, not dialect */ |
8830d7e0 SP |
1911 | string = match_strdup(args); |
1912 | if (string == NULL) | |
1913 | goto out_nomem; | |
1914 | ||
7e682f76 | 1915 | /* If interface changes in mount.cifs bump to new ver */ |
87e747cd | 1916 | if (strncasecmp(string, "1", 1) == 0) { |
7e682f76 SF |
1917 | if (strlen(string) > 1) { |
1918 | pr_warn("Bad mount helper ver=%s. Did " | |
1919 | "you want SMB1 (CIFS) dialect " | |
1920 | "and mean to type vers=1.0 " | |
1921 | "instead?\n", string); | |
1922 | goto cifs_parse_mount_err; | |
1923 | } | |
8830d7e0 SP |
1924 | /* This is the default */ |
1925 | break; | |
1926 | } | |
1927 | /* For all other value, error */ | |
7e682f76 | 1928 | pr_warn("CIFS: Invalid mount helper version specified\n"); |
b946845a | 1929 | goto cifs_parse_mount_err; |
23db65f5 | 1930 | case Opt_vers: |
7e682f76 | 1931 | /* protocol version (dialect) */ |
23db65f5 JL |
1932 | string = match_strdup(args); |
1933 | if (string == NULL) | |
1934 | goto out_nomem; | |
1935 | ||
1936 | if (cifs_parse_smb_version(string, vol) != 0) | |
1937 | goto cifs_parse_mount_err; | |
7e682f76 | 1938 | got_version = true; |
23db65f5 | 1939 | break; |
8830d7e0 SP |
1940 | case Opt_sec: |
1941 | string = match_strdup(args); | |
1942 | if (string == NULL) | |
1943 | goto out_nomem; | |
1944 | ||
8830d7e0 SP |
1945 | if (cifs_parse_security_flavors(string, vol) != 0) |
1946 | goto cifs_parse_mount_err; | |
1947 | break; | |
15b6a473 JL |
1948 | case Opt_cache: |
1949 | string = match_strdup(args); | |
1950 | if (string == NULL) | |
1951 | goto out_nomem; | |
1952 | ||
1953 | if (cifs_parse_cache_flavor(string, vol) != 0) | |
1954 | goto cifs_parse_mount_err; | |
1955 | break; | |
8830d7e0 | 1956 | default: |
d8162558 JL |
1957 | /* |
1958 | * An option we don't recognize. Save it off for later | |
1959 | * if we haven't already found one | |
1960 | */ | |
1961 | if (!invalid) | |
1962 | invalid = data; | |
8830d7e0 | 1963 | break; |
1da177e4 | 1964 | } |
8830d7e0 SP |
1965 | /* Free up any allocated string */ |
1966 | kfree(string); | |
1967 | string = NULL; | |
1da177e4 | 1968 | } |
0eb8a132 | 1969 | |
d8162558 | 1970 | if (!sloppy && invalid) { |
0b456f04 | 1971 | pr_err("CIFS: Unknown mount option \"%s\"\n", invalid); |
d8162558 JL |
1972 | goto cifs_parse_mount_err; |
1973 | } | |
1974 | ||
8339dd32 LL |
1975 | if (vol->rdma && vol->vals->protocol_id < SMB30_PROT_ID) { |
1976 | cifs_dbg(VFS, "SMB Direct requires Version >=3.0\n"); | |
1977 | goto cifs_parse_mount_err; | |
1978 | } | |
1979 | ||
8801e902 LL |
1980 | #ifdef CONFIG_CIFS_SMB_DIRECT |
1981 | if (vol->rdma && vol->sign) { | |
1982 | cifs_dbg(VFS, "Currently SMB direct doesn't support signing." | |
1983 | " This is being fixed\n"); | |
1984 | goto cifs_parse_mount_err; | |
1985 | } | |
1986 | #endif | |
1987 | ||
8a8798a5 JL |
1988 | #ifndef CONFIG_KEYS |
1989 | /* Muliuser mounts require CONFIG_KEYS support */ | |
1990 | if (vol->multiuser) { | |
f96637be | 1991 | cifs_dbg(VFS, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n"); |
b946845a | 1992 | goto cifs_parse_mount_err; |
0eb8a132 | 1993 | } |
8a8798a5 | 1994 | #endif |
e5e69abd | 1995 | if (!vol->UNC) { |
37d4f99b | 1996 | cifs_dbg(VFS, "CIFS mount error: No usable UNC path provided in device string!\n"); |
e5e69abd JL |
1997 | goto cifs_parse_mount_err; |
1998 | } | |
0eb8a132 | 1999 | |
62a1a439 JL |
2000 | /* make sure UNC has a share name */ |
2001 | if (!strchr(vol->UNC + 3, '\\')) { | |
f96637be | 2002 | cifs_dbg(VFS, "Malformed UNC. Unable to find share name.\n"); |
62a1a439 JL |
2003 | goto cifs_parse_mount_err; |
2004 | } | |
2005 | ||
b979aaa1 | 2006 | if (!got_ip) { |
29bb3158 DP |
2007 | int len; |
2008 | const char *slash; | |
2009 | ||
b979aaa1 | 2010 | /* No ip= option specified? Try to get it from UNC */ |
29bb3158 DP |
2011 | /* Use the address part of the UNC. */ |
2012 | slash = strchr(&vol->UNC[2], '\\'); | |
2013 | len = slash - &vol->UNC[2]; | |
2014 | if (!cifs_convert_address(dstaddr, &vol->UNC[2], len)) { | |
0b456f04 | 2015 | pr_err("Unable to determine destination address.\n"); |
b979aaa1 JL |
2016 | goto cifs_parse_mount_err; |
2017 | } | |
2018 | } | |
2019 | ||
2020 | /* set the port that we got earlier */ | |
2021 | cifs_set_port(dstaddr, port); | |
1da177e4 | 2022 | |
9b9d6b24 JL |
2023 | if (uid_specified) |
2024 | vol->override_uid = override_uid; | |
2025 | else if (override_uid == 1) | |
0b456f04 | 2026 | pr_notice("CIFS: ignoring forceuid mount option specified with no uid= option.\n"); |
9b9d6b24 JL |
2027 | |
2028 | if (gid_specified) | |
2029 | vol->override_gid = override_gid; | |
2030 | else if (override_gid == 1) | |
0b456f04 | 2031 | pr_notice("CIFS: ignoring forcegid mount option specified with no gid= option.\n"); |
9b9d6b24 | 2032 | |
7e682f76 SF |
2033 | if (got_version == false) |
2034 | pr_warn("No dialect specified on mount. Default has changed to " | |
9764c02f | 2035 | "a more secure dialect, SMB2.1 or later (e.g. SMB3), from CIFS " |
7e682f76 | 2036 | "(SMB1). To use the less secure SMB1 dialect to access " |
9764c02f SF |
2037 | "old servers which do not support SMB3 (or SMB2.1) specify vers=1.0" |
2038 | " on mount.\n"); | |
7e682f76 | 2039 | |
b946845a | 2040 | kfree(mountdata_copy); |
1da177e4 | 2041 | return 0; |
b946845a | 2042 | |
8830d7e0 | 2043 | out_nomem: |
0b456f04 | 2044 | pr_warn("Could not allocate temporary buffer\n"); |
b946845a | 2045 | cifs_parse_mount_err: |
8830d7e0 | 2046 | kfree(string); |
b946845a SF |
2047 | kfree(mountdata_copy); |
2048 | return 1; | |
1da177e4 LT |
2049 | } |
2050 | ||
3eb9a889 BG |
2051 | /** Returns true if srcaddr isn't specified and rhs isn't |
2052 | * specified, or if srcaddr is specified and | |
2053 | * matches the IP address of the rhs argument. | |
2054 | */ | |
2055 | static bool | |
2056 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
2057 | { | |
2058 | switch (srcaddr->sa_family) { | |
2059 | case AF_UNSPEC: | |
2060 | return (rhs->sa_family == AF_UNSPEC); | |
2061 | case AF_INET: { | |
2062 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
2063 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
2064 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
2065 | } | |
2066 | case AF_INET6: { | |
2067 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
e3e2775c | 2068 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs; |
3eb9a889 BG |
2069 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); |
2070 | } | |
2071 | default: | |
2072 | WARN_ON(1); | |
2073 | return false; /* don't expect to be here */ | |
2074 | } | |
2075 | } | |
2076 | ||
4b886136 PS |
2077 | /* |
2078 | * If no port is specified in addr structure, we try to match with 445 port | |
2079 | * and if it fails - with 139 ports. It should be called only if address | |
2080 | * families of server and addr are equal. | |
2081 | */ | |
2082 | static bool | |
2083 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
2084 | { | |
6da97910 | 2085 | __be16 port, *sport; |
4b886136 PS |
2086 | |
2087 | switch (addr->sa_family) { | |
2088 | case AF_INET: | |
2089 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
2090 | port = ((struct sockaddr_in *) addr)->sin_port; | |
2091 | break; | |
2092 | case AF_INET6: | |
2093 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
2094 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
2095 | break; | |
2096 | default: | |
2097 | WARN_ON(1); | |
2098 | return false; | |
2099 | } | |
2100 | ||
2101 | if (!port) { | |
2102 | port = htons(CIFS_PORT); | |
2103 | if (port == *sport) | |
2104 | return true; | |
2105 | ||
2106 | port = htons(RFC1001_PORT); | |
2107 | } | |
2108 | ||
2109 | return port == *sport; | |
2110 | } | |
3eb9a889 | 2111 | |
4515148e | 2112 | static bool |
3eb9a889 BG |
2113 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
2114 | struct sockaddr *srcaddr) | |
4515148e | 2115 | { |
4515148e | 2116 | switch (addr->sa_family) { |
a9f1b85e PS |
2117 | case AF_INET: { |
2118 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
2119 | struct sockaddr_in *srv_addr4 = | |
2120 | (struct sockaddr_in *)&server->dstaddr; | |
2121 | ||
2122 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 2123 | return false; |
4515148e | 2124 | break; |
a9f1b85e PS |
2125 | } |
2126 | case AF_INET6: { | |
2127 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
2128 | struct sockaddr_in6 *srv_addr6 = | |
2129 | (struct sockaddr_in6 *)&server->dstaddr; | |
2130 | ||
4515148e | 2131 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 2132 | &srv_addr6->sin6_addr)) |
4515148e | 2133 | return false; |
a9f1b85e | 2134 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 2135 | return false; |
4515148e JL |
2136 | break; |
2137 | } | |
a9f1b85e PS |
2138 | default: |
2139 | WARN_ON(1); | |
2140 | return false; /* don't expect to be here */ | |
2141 | } | |
4515148e | 2142 | |
3eb9a889 BG |
2143 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
2144 | return false; | |
2145 | ||
4515148e JL |
2146 | return true; |
2147 | } | |
2148 | ||
daf5b0b6 JL |
2149 | static bool |
2150 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
2151 | { | |
3f618223 JL |
2152 | /* |
2153 | * The select_sectype function should either return the vol->sectype | |
2154 | * that was specified, or "Unspecified" if that sectype was not | |
2155 | * compatible with the given NEGOTIATE request. | |
2156 | */ | |
ef65aaed SP |
2157 | if (server->ops->select_sectype(server, vol->sectype) |
2158 | == Unspecified) | |
daf5b0b6 | 2159 | return false; |
daf5b0b6 | 2160 | |
3f618223 JL |
2161 | /* |
2162 | * Now check if signing mode is acceptable. No need to check | |
2163 | * global_secflags at this point since if MUST_SIGN is set then | |
2164 | * the server->sign had better be too. | |
2165 | */ | |
38d77c50 JL |
2166 | if (vol->sign && !server->sign) |
2167 | return false; | |
daf5b0b6 JL |
2168 | |
2169 | return true; | |
2170 | } | |
2171 | ||
9fa114f7 | 2172 | static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol) |
37bb04e5 | 2173 | { |
9fa114f7 JL |
2174 | struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr; |
2175 | ||
a0b3df5c JL |
2176 | if (vol->nosharesock) |
2177 | return 0; | |
2178 | ||
9764c02f | 2179 | /* BB update this for smb3any and default case */ |
23db65f5 JL |
2180 | if ((server->vals != vol->vals) || (server->ops != vol->ops)) |
2181 | return 0; | |
2182 | ||
37bb04e5 PS |
2183 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) |
2184 | return 0; | |
2185 | ||
2186 | if (!match_address(server, addr, | |
2187 | (struct sockaddr *)&vol->srcaddr)) | |
2188 | return 0; | |
2189 | ||
2190 | if (!match_port(server, addr)) | |
2191 | return 0; | |
2192 | ||
2193 | if (!match_security(server, vol)) | |
2194 | return 0; | |
2195 | ||
b782fcc1 | 2196 | if (server->echo_interval != vol->echo_interval * HZ) |
adfeb3e0 SF |
2197 | return 0; |
2198 | ||
8339dd32 LL |
2199 | if (server->rdma != vol->rdma) |
2200 | return 0; | |
2201 | ||
37bb04e5 PS |
2202 | return 1; |
2203 | } | |
2204 | ||
e7ddee90 | 2205 | static struct TCP_Server_Info * |
9fa114f7 | 2206 | cifs_find_tcp_session(struct smb_vol *vol) |
1da177e4 | 2207 | { |
e7ddee90 | 2208 | struct TCP_Server_Info *server; |
e7ddee90 | 2209 | |
3f9bcca7 | 2210 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 2211 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
9fa114f7 | 2212 | if (!match_server(server, vol)) |
daf5b0b6 JL |
2213 | continue; |
2214 | ||
e7ddee90 | 2215 | ++server->srv_count; |
3f9bcca7 | 2216 | spin_unlock(&cifs_tcp_ses_lock); |
f96637be | 2217 | cifs_dbg(FYI, "Existing tcp session with server found\n"); |
e7ddee90 | 2218 | return server; |
1da177e4 | 2219 | } |
3f9bcca7 | 2220 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2221 | return NULL; |
2222 | } | |
1b20d672 | 2223 | |
53e0e11e PS |
2224 | void |
2225 | cifs_put_tcp_session(struct TCP_Server_Info *server, int from_reconnect) | |
1da177e4 | 2226 | { |
a5c3e1c7 SF |
2227 | struct task_struct *task; |
2228 | ||
3f9bcca7 | 2229 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 2230 | if (--server->srv_count > 0) { |
3f9bcca7 | 2231 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 2232 | return; |
1da177e4 | 2233 | } |
1b20d672 | 2234 | |
f1d0c998 RL |
2235 | put_net(cifs_net_ns(server)); |
2236 | ||
e7ddee90 | 2237 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 2238 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2239 | |
c74093b6 JL |
2240 | cancel_delayed_work_sync(&server->echo); |
2241 | ||
53e0e11e PS |
2242 | if (from_reconnect) |
2243 | /* | |
2244 | * Avoid deadlock here: reconnect work calls | |
2245 | * cifs_put_tcp_session() at its end. Need to be sure | |
2246 | * that reconnect work does nothing with server pointer after | |
2247 | * that step. | |
2248 | */ | |
2249 | cancel_delayed_work(&server->reconnect); | |
2250 | else | |
2251 | cancel_delayed_work_sync(&server->reconnect); | |
53e0e11e | 2252 | |
e7ddee90 JL |
2253 | spin_lock(&GlobalMid_Lock); |
2254 | server->tcpStatus = CifsExiting; | |
2255 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 2256 | |
026e93dc | 2257 | cifs_crypto_secmech_release(server); |
488f1d2d SJ |
2258 | cifs_fscache_release_client_cookie(server); |
2259 | ||
21e73393 SP |
2260 | kfree(server->session_key.response); |
2261 | server->session_key.response = NULL; | |
2262 | server->session_key.len = 0; | |
a5c3e1c7 SF |
2263 | |
2264 | task = xchg(&server->tsk, NULL); | |
2265 | if (task) | |
2266 | force_sig(SIGKILL, task); | |
1da177e4 LT |
2267 | } |
2268 | ||
63c038c2 JL |
2269 | static struct TCP_Server_Info * |
2270 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
2271 | { | |
2272 | struct TCP_Server_Info *tcp_ses = NULL; | |
63c038c2 JL |
2273 | int rc; |
2274 | ||
f96637be | 2275 | cifs_dbg(FYI, "UNC: %s\n", volume_info->UNC); |
63c038c2 JL |
2276 | |
2277 | /* see if we already have a matching tcp_ses */ | |
9fa114f7 | 2278 | tcp_ses = cifs_find_tcp_session(volume_info); |
63c038c2 JL |
2279 | if (tcp_ses) |
2280 | return tcp_ses; | |
2281 | ||
2282 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
2283 | if (!tcp_ses) { | |
2284 | rc = -ENOMEM; | |
2285 | goto out_err; | |
2286 | } | |
2287 | ||
23db65f5 JL |
2288 | tcp_ses->ops = volume_info->ops; |
2289 | tcp_ses->vals = volume_info->vals; | |
f1d0c998 | 2290 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
2291 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
2292 | if (IS_ERR(tcp_ses->hostname)) { | |
2293 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 2294 | goto out_err_crypto_release; |
63c038c2 JL |
2295 | } |
2296 | ||
2297 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
2298 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 2299 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
8339dd32 | 2300 | tcp_ses->rdma = volume_info->rdma; |
fc40f9cf | 2301 | tcp_ses->in_flight = 0; |
2d86dbc9 | 2302 | tcp_ses->credits = 1; |
63c038c2 JL |
2303 | init_waitqueue_head(&tcp_ses->response_q); |
2304 | init_waitqueue_head(&tcp_ses->request_q); | |
2305 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
2306 | mutex_init(&tcp_ses->srv_mutex); | |
2307 | memcpy(tcp_ses->workstation_RFC1001_name, | |
2308 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
2309 | memcpy(tcp_ses->server_RFC1001_name, | |
2310 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 2311 | tcp_ses->session_estab = false; |
63c038c2 | 2312 | tcp_ses->sequence_number = 0; |
fda35943 | 2313 | tcp_ses->lstrp = jiffies; |
58fa015f | 2314 | spin_lock_init(&tcp_ses->req_lock); |
63c038c2 JL |
2315 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
2316 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 2317 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
53e0e11e PS |
2318 | INIT_DELAYED_WORK(&tcp_ses->reconnect, smb2_reconnect_server); |
2319 | mutex_init(&tcp_ses->reconnect_mutex); | |
9fa114f7 JL |
2320 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
2321 | sizeof(tcp_ses->srcaddr)); | |
2322 | memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr, | |
2323 | sizeof(tcp_ses->dstaddr)); | |
fa70b87c | 2324 | generate_random_uuid(tcp_ses->client_guid); |
63c038c2 JL |
2325 | /* |
2326 | * at this point we are the only ones with the pointer | |
2327 | * to the struct since the kernel thread not created yet | |
2328 | * no need to spinlock this init of tcpStatus or srv_count | |
2329 | */ | |
2330 | tcp_ses->tcpStatus = CifsNew; | |
2331 | ++tcp_ses->srv_count; | |
2332 | ||
adfeb3e0 SF |
2333 | if (volume_info->echo_interval >= SMB_ECHO_INTERVAL_MIN && |
2334 | volume_info->echo_interval <= SMB_ECHO_INTERVAL_MAX) | |
2335 | tcp_ses->echo_interval = volume_info->echo_interval * HZ; | |
2336 | else | |
2337 | tcp_ses->echo_interval = SMB_ECHO_INTERVAL_DEFAULT * HZ; | |
2f894646 LL |
2338 | if (tcp_ses->rdma) { |
2339 | #ifndef CONFIG_CIFS_SMB_DIRECT | |
2340 | cifs_dbg(VFS, "CONFIG_CIFS_SMB_DIRECT is not enabled\n"); | |
2341 | rc = -ENOENT; | |
2342 | goto out_err_crypto_release; | |
2343 | #endif | |
2344 | tcp_ses->smbd_conn = smbd_get_connection( | |
2345 | tcp_ses, (struct sockaddr *)&volume_info->dstaddr); | |
2346 | if (tcp_ses->smbd_conn) { | |
2347 | cifs_dbg(VFS, "RDMA transport established\n"); | |
2348 | rc = 0; | |
2349 | goto smbd_connected; | |
2350 | } else { | |
2351 | rc = -ENOENT; | |
2352 | goto out_err_crypto_release; | |
2353 | } | |
2354 | } | |
a9f1b85e | 2355 | rc = ip_connect(tcp_ses); |
63c038c2 | 2356 | if (rc < 0) { |
f96637be | 2357 | cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n"); |
f7c5445a | 2358 | goto out_err_crypto_release; |
63c038c2 | 2359 | } |
2f894646 | 2360 | smbd_connected: |
63c038c2 JL |
2361 | /* |
2362 | * since we're in a cifs function already, we know that | |
2363 | * this will succeed. No need for try_module_get(). | |
2364 | */ | |
2365 | __module_get(THIS_MODULE); | |
7c97c200 | 2366 | tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, |
63c038c2 JL |
2367 | tcp_ses, "cifsd"); |
2368 | if (IS_ERR(tcp_ses->tsk)) { | |
2369 | rc = PTR_ERR(tcp_ses->tsk); | |
f96637be | 2370 | cifs_dbg(VFS, "error %d create cifsd thread\n", rc); |
63c038c2 | 2371 | module_put(THIS_MODULE); |
f7c5445a | 2372 | goto out_err_crypto_release; |
63c038c2 | 2373 | } |
fd88ce93 | 2374 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
63c038c2 JL |
2375 | |
2376 | /* thread spawned, put it on the list */ | |
3f9bcca7 | 2377 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 2378 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 2379 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 2380 | |
488f1d2d SJ |
2381 | cifs_fscache_get_client_cookie(tcp_ses); |
2382 | ||
c74093b6 | 2383 | /* queue echo request delayed work */ |
adfeb3e0 | 2384 | queue_delayed_work(cifsiod_wq, &tcp_ses->echo, tcp_ses->echo_interval); |
c74093b6 | 2385 | |
63c038c2 JL |
2386 | return tcp_ses; |
2387 | ||
f7c5445a | 2388 | out_err_crypto_release: |
026e93dc | 2389 | cifs_crypto_secmech_release(tcp_ses); |
d2b91521 | 2390 | |
f1d0c998 RL |
2391 | put_net(cifs_net_ns(tcp_ses)); |
2392 | ||
63c038c2 JL |
2393 | out_err: |
2394 | if (tcp_ses) { | |
8347a5cd SF |
2395 | if (!IS_ERR(tcp_ses->hostname)) |
2396 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
2397 | if (tcp_ses->ssocket) |
2398 | sock_release(tcp_ses->ssocket); | |
2399 | kfree(tcp_ses); | |
2400 | } | |
2401 | return ERR_PTR(rc); | |
2402 | } | |
2403 | ||
96daf2b0 | 2404 | static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
37bb04e5 | 2405 | { |
3f618223 JL |
2406 | if (vol->sectype != Unspecified && |
2407 | vol->sectype != ses->sectype) | |
2408 | return 0; | |
2409 | ||
2410 | switch (ses->sectype) { | |
37bb04e5 | 2411 | case Kerberos: |
64ed39dd | 2412 | if (!uid_eq(vol->cred_uid, ses->cred_uid)) |
37bb04e5 PS |
2413 | return 0; |
2414 | break; | |
2415 | default: | |
04febabc JL |
2416 | /* NULL username means anonymous session */ |
2417 | if (ses->user_name == NULL) { | |
2418 | if (!vol->nullauth) | |
2419 | return 0; | |
2420 | break; | |
2421 | } | |
2422 | ||
37bb04e5 | 2423 | /* anything else takes username/password */ |
04febabc JL |
2424 | if (strncmp(ses->user_name, |
2425 | vol->username ? vol->username : "", | |
8c3a2b4c | 2426 | CIFS_MAX_USERNAME_LEN)) |
37bb04e5 | 2427 | return 0; |
08b37d51 | 2428 | if ((vol->username && strlen(vol->username) != 0) && |
37bb04e5 PS |
2429 | ses->password != NULL && |
2430 | strncmp(ses->password, | |
2431 | vol->password ? vol->password : "", | |
8c3a2b4c | 2432 | CIFS_MAX_PASSWORD_LEN)) |
37bb04e5 PS |
2433 | return 0; |
2434 | } | |
2435 | return 1; | |
2436 | } | |
2437 | ||
b327a717 AA |
2438 | /** |
2439 | * cifs_setup_ipc - helper to setup the IPC tcon for the session | |
2440 | * | |
2441 | * A new IPC connection is made and stored in the session | |
2442 | * tcon_ipc. The IPC tcon has the same lifetime as the session. | |
2443 | */ | |
2444 | static int | |
2445 | cifs_setup_ipc(struct cifs_ses *ses, struct smb_vol *volume_info) | |
2446 | { | |
2447 | int rc = 0, xid; | |
2448 | struct cifs_tcon *tcon; | |
2449 | struct nls_table *nls_codepage; | |
2450 | char unc[SERVER_NAME_LENGTH + sizeof("//x/IPC$")] = {0}; | |
2451 | bool seal = false; | |
2452 | ||
2453 | /* | |
2454 | * If the mount request that resulted in the creation of the | |
2455 | * session requires encryption, force IPC to be encrypted too. | |
2456 | */ | |
2457 | if (volume_info->seal) { | |
2458 | if (ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) | |
2459 | seal = true; | |
2460 | else { | |
2461 | cifs_dbg(VFS, | |
2462 | "IPC: server doesn't support encryption\n"); | |
2463 | return -EOPNOTSUPP; | |
2464 | } | |
2465 | } | |
2466 | ||
2467 | tcon = tconInfoAlloc(); | |
2468 | if (tcon == NULL) | |
2469 | return -ENOMEM; | |
2470 | ||
2471 | snprintf(unc, sizeof(unc), "\\\\%s\\IPC$", ses->serverName); | |
2472 | ||
2473 | /* cannot fail */ | |
2474 | nls_codepage = load_nls_default(); | |
2475 | ||
2476 | xid = get_xid(); | |
2477 | tcon->ses = ses; | |
2478 | tcon->ipc = true; | |
2479 | tcon->seal = seal; | |
2480 | rc = ses->server->ops->tree_connect(xid, ses, unc, tcon, nls_codepage); | |
2481 | free_xid(xid); | |
2482 | ||
2483 | if (rc) { | |
2484 | cifs_dbg(VFS, "failed to connect to IPC (rc=%d)\n", rc); | |
2485 | tconInfoFree(tcon); | |
2486 | goto out; | |
2487 | } | |
2488 | ||
2489 | cifs_dbg(FYI, "IPC tcon rc = %d ipc tid = %d\n", rc, tcon->tid); | |
2490 | ||
2491 | ses->tcon_ipc = tcon; | |
2492 | out: | |
2493 | unload_nls(nls_codepage); | |
2494 | return rc; | |
2495 | } | |
2496 | ||
2497 | /** | |
2498 | * cifs_free_ipc - helper to release the session IPC tcon | |
2499 | * | |
2500 | * Needs to be called everytime a session is destroyed | |
2501 | */ | |
2502 | static int | |
2503 | cifs_free_ipc(struct cifs_ses *ses) | |
2504 | { | |
2505 | int rc = 0, xid; | |
2506 | struct cifs_tcon *tcon = ses->tcon_ipc; | |
2507 | ||
2508 | if (tcon == NULL) | |
2509 | return 0; | |
2510 | ||
2511 | if (ses->server->ops->tree_disconnect) { | |
2512 | xid = get_xid(); | |
2513 | rc = ses->server->ops->tree_disconnect(xid, tcon); | |
2514 | free_xid(xid); | |
2515 | } | |
2516 | ||
2517 | if (rc) | |
2518 | cifs_dbg(FYI, "failed to disconnect IPC tcon (rc=%d)\n", rc); | |
2519 | ||
2520 | tconInfoFree(tcon); | |
2521 | ses->tcon_ipc = NULL; | |
2522 | return rc; | |
2523 | } | |
2524 | ||
96daf2b0 | 2525 | static struct cifs_ses * |
4ff67b72 | 2526 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 2527 | { |
96daf2b0 | 2528 | struct cifs_ses *ses; |
dea570e0 | 2529 | |
3f9bcca7 | 2530 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 | 2531 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
7f48558e SP |
2532 | if (ses->status == CifsExiting) |
2533 | continue; | |
37bb04e5 PS |
2534 | if (!match_session(ses, vol)) |
2535 | continue; | |
14fbf50d | 2536 | ++ses->ses_count; |
3f9bcca7 | 2537 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2538 | return ses; |
2539 | } | |
3f9bcca7 | 2540 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2541 | return NULL; |
2542 | } | |
dea570e0 | 2543 | |
14fbf50d | 2544 | static void |
96daf2b0 | 2545 | cifs_put_smb_ses(struct cifs_ses *ses) |
14fbf50d | 2546 | { |
7f48558e | 2547 | unsigned int rc, xid; |
14fbf50d | 2548 | struct TCP_Server_Info *server = ses->server; |
dea570e0 | 2549 | |
f96637be | 2550 | cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count); |
7f48558e | 2551 | |
3f9bcca7 | 2552 | spin_lock(&cifs_tcp_ses_lock); |
7f48558e SP |
2553 | if (ses->status == CifsExiting) { |
2554 | spin_unlock(&cifs_tcp_ses_lock); | |
2555 | return; | |
2556 | } | |
14fbf50d | 2557 | if (--ses->ses_count > 0) { |
3f9bcca7 | 2558 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2559 | return; |
2560 | } | |
7f48558e SP |
2561 | if (ses->status == CifsGood) |
2562 | ses->status = CifsExiting; | |
3f9bcca7 | 2563 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2564 | |
b327a717 AA |
2565 | cifs_free_ipc(ses); |
2566 | ||
7f48558e | 2567 | if (ses->status == CifsExiting && server->ops->logoff) { |
6d5786a3 | 2568 | xid = get_xid(); |
7f48558e SP |
2569 | rc = server->ops->logoff(xid, ses); |
2570 | if (rc) | |
2571 | cifs_dbg(VFS, "%s: Session Logoff failure rc=%d\n", | |
2572 | __func__, rc); | |
6d5786a3 | 2573 | _free_xid(xid); |
14fbf50d | 2574 | } |
7f48558e SP |
2575 | |
2576 | spin_lock(&cifs_tcp_ses_lock); | |
2577 | list_del_init(&ses->smb_ses_list); | |
2578 | spin_unlock(&cifs_tcp_ses_lock); | |
2579 | ||
14fbf50d | 2580 | sesInfoFree(ses); |
53e0e11e | 2581 | cifs_put_tcp_session(server, 0); |
14fbf50d | 2582 | } |
dea570e0 | 2583 | |
8a8798a5 JL |
2584 | #ifdef CONFIG_KEYS |
2585 | ||
057d6332 CG |
2586 | /* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */ |
2587 | #define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1) | |
8a8798a5 JL |
2588 | |
2589 | /* Populate username and pw fields from keyring if possible */ | |
2590 | static int | |
2591 | cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) | |
2592 | { | |
2593 | int rc = 0; | |
146aa8b1 DH |
2594 | const char *delim, *payload; |
2595 | char *desc; | |
8a8798a5 JL |
2596 | ssize_t len; |
2597 | struct key *key; | |
2598 | struct TCP_Server_Info *server = ses->server; | |
2599 | struct sockaddr_in *sa; | |
2600 | struct sockaddr_in6 *sa6; | |
146aa8b1 | 2601 | const struct user_key_payload *upayload; |
8a8798a5 JL |
2602 | |
2603 | desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL); | |
2604 | if (!desc) | |
2605 | return -ENOMEM; | |
2606 | ||
2607 | /* try to find an address key first */ | |
2608 | switch (server->dstaddr.ss_family) { | |
2609 | case AF_INET: | |
2610 | sa = (struct sockaddr_in *)&server->dstaddr; | |
2611 | sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr); | |
2612 | break; | |
2613 | case AF_INET6: | |
2614 | sa6 = (struct sockaddr_in6 *)&server->dstaddr; | |
2615 | sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr); | |
2616 | break; | |
2617 | default: | |
f96637be JP |
2618 | cifs_dbg(FYI, "Bad ss_family (%hu)\n", |
2619 | server->dstaddr.ss_family); | |
8a8798a5 JL |
2620 | rc = -EINVAL; |
2621 | goto out_err; | |
2622 | } | |
2623 | ||
f96637be | 2624 | cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
8a8798a5 JL |
2625 | key = request_key(&key_type_logon, desc, ""); |
2626 | if (IS_ERR(key)) { | |
2627 | if (!ses->domainName) { | |
f96637be | 2628 | cifs_dbg(FYI, "domainName is NULL\n"); |
8a8798a5 JL |
2629 | rc = PTR_ERR(key); |
2630 | goto out_err; | |
2631 | } | |
2632 | ||
2633 | /* didn't work, try to find a domain key */ | |
2634 | sprintf(desc, "cifs:d:%s", ses->domainName); | |
f96637be | 2635 | cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
8a8798a5 JL |
2636 | key = request_key(&key_type_logon, desc, ""); |
2637 | if (IS_ERR(key)) { | |
2638 | rc = PTR_ERR(key); | |
2639 | goto out_err; | |
2640 | } | |
2641 | } | |
2642 | ||
2643 | down_read(&key->sem); | |
0837e49a | 2644 | upayload = user_key_payload_locked(key); |
8a8798a5 | 2645 | if (IS_ERR_OR_NULL(upayload)) { |
4edc53c1 | 2646 | rc = upayload ? PTR_ERR(upayload) : -EINVAL; |
8a8798a5 JL |
2647 | goto out_key_put; |
2648 | } | |
2649 | ||
2650 | /* find first : in payload */ | |
146aa8b1 | 2651 | payload = upayload->data; |
8a8798a5 | 2652 | delim = strnchr(payload, upayload->datalen, ':'); |
f96637be | 2653 | cifs_dbg(FYI, "payload=%s\n", payload); |
8a8798a5 | 2654 | if (!delim) { |
f96637be JP |
2655 | cifs_dbg(FYI, "Unable to find ':' in payload (datalen=%d)\n", |
2656 | upayload->datalen); | |
8a8798a5 JL |
2657 | rc = -EINVAL; |
2658 | goto out_key_put; | |
2659 | } | |
2660 | ||
2661 | len = delim - payload; | |
8c3a2b4c | 2662 | if (len > CIFS_MAX_USERNAME_LEN || len <= 0) { |
f96637be JP |
2663 | cifs_dbg(FYI, "Bad value from username search (len=%zd)\n", |
2664 | len); | |
8a8798a5 JL |
2665 | rc = -EINVAL; |
2666 | goto out_key_put; | |
2667 | } | |
2668 | ||
2669 | vol->username = kstrndup(payload, len, GFP_KERNEL); | |
2670 | if (!vol->username) { | |
f96637be JP |
2671 | cifs_dbg(FYI, "Unable to allocate %zd bytes for username\n", |
2672 | len); | |
8a8798a5 JL |
2673 | rc = -ENOMEM; |
2674 | goto out_key_put; | |
2675 | } | |
f96637be | 2676 | cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username); |
8a8798a5 JL |
2677 | |
2678 | len = key->datalen - (len + 1); | |
8c3a2b4c | 2679 | if (len > CIFS_MAX_PASSWORD_LEN || len <= 0) { |
f96637be | 2680 | cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len); |
8a8798a5 JL |
2681 | rc = -EINVAL; |
2682 | kfree(vol->username); | |
2683 | vol->username = NULL; | |
2684 | goto out_key_put; | |
2685 | } | |
2686 | ||
2687 | ++delim; | |
2688 | vol->password = kstrndup(delim, len, GFP_KERNEL); | |
2689 | if (!vol->password) { | |
f96637be JP |
2690 | cifs_dbg(FYI, "Unable to allocate %zd bytes for password\n", |
2691 | len); | |
8a8798a5 JL |
2692 | rc = -ENOMEM; |
2693 | kfree(vol->username); | |
2694 | vol->username = NULL; | |
2695 | goto out_key_put; | |
2696 | } | |
2697 | ||
2698 | out_key_put: | |
2699 | up_read(&key->sem); | |
2700 | key_put(key); | |
2701 | out_err: | |
2702 | kfree(desc); | |
f96637be | 2703 | cifs_dbg(FYI, "%s: returning %d\n", __func__, rc); |
8a8798a5 JL |
2704 | return rc; |
2705 | } | |
2706 | #else /* ! CONFIG_KEYS */ | |
2707 | static inline int | |
2708 | cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), | |
2709 | struct cifs_ses *ses __attribute__((unused))) | |
2710 | { | |
2711 | return -ENOSYS; | |
2712 | } | |
2713 | #endif /* CONFIG_KEYS */ | |
2714 | ||
4a1360d0 AA |
2715 | /** |
2716 | * cifs_get_smb_ses - get a session matching @volume_info data from @server | |
2717 | * | |
2718 | * This function assumes it is being called from cifs_mount() where we | |
2719 | * already got a server reference (server refcount +1). See | |
2720 | * cifs_get_tcon() for refcount explanations. | |
2721 | */ | |
96daf2b0 | 2722 | static struct cifs_ses * |
36988c76 JL |
2723 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
2724 | { | |
286170aa PS |
2725 | int rc = -ENOMEM; |
2726 | unsigned int xid; | |
96daf2b0 | 2727 | struct cifs_ses *ses; |
a9f1b85e PS |
2728 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
2729 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 | 2730 | |
6d5786a3 | 2731 | xid = get_xid(); |
36988c76 | 2732 | |
4ff67b72 | 2733 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 | 2734 | if (ses) { |
f96637be JP |
2735 | cifs_dbg(FYI, "Existing smb sess found (status=%d)\n", |
2736 | ses->status); | |
36988c76 | 2737 | |
36988c76 | 2738 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
2739 | rc = cifs_negotiate_protocol(xid, ses); |
2740 | if (rc) { | |
2741 | mutex_unlock(&ses->session_mutex); | |
2742 | /* problem -- put our ses reference */ | |
2743 | cifs_put_smb_ses(ses); | |
6d5786a3 | 2744 | free_xid(xid); |
198b5682 JL |
2745 | return ERR_PTR(rc); |
2746 | } | |
36988c76 | 2747 | if (ses->need_reconnect) { |
f96637be | 2748 | cifs_dbg(FYI, "Session needs reconnect\n"); |
36988c76 JL |
2749 | rc = cifs_setup_session(xid, ses, |
2750 | volume_info->local_nls); | |
2751 | if (rc) { | |
2752 | mutex_unlock(&ses->session_mutex); | |
2753 | /* problem -- put our reference */ | |
2754 | cifs_put_smb_ses(ses); | |
6d5786a3 | 2755 | free_xid(xid); |
36988c76 JL |
2756 | return ERR_PTR(rc); |
2757 | } | |
2758 | } | |
2759 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
2760 | |
2761 | /* existing SMB ses has a server reference already */ | |
53e0e11e | 2762 | cifs_put_tcp_session(server, 0); |
6d5786a3 | 2763 | free_xid(xid); |
36988c76 JL |
2764 | return ses; |
2765 | } | |
2766 | ||
f96637be | 2767 | cifs_dbg(FYI, "Existing smb sess not found\n"); |
36988c76 JL |
2768 | ses = sesInfoAlloc(); |
2769 | if (ses == NULL) | |
2770 | goto get_ses_fail; | |
2771 | ||
2772 | /* new SMB session uses our server ref */ | |
2773 | ses->server = server; | |
a9f1b85e PS |
2774 | if (server->dstaddr.ss_family == AF_INET6) |
2775 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 2776 | else |
a9f1b85e | 2777 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 2778 | |
8727c8a8 SF |
2779 | if (volume_info->username) { |
2780 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
2781 | if (!ses->user_name) | |
2782 | goto get_ses_fail; | |
2783 | } | |
36988c76 JL |
2784 | |
2785 | /* volume_info->password freed at unmount */ | |
2786 | if (volume_info->password) { | |
2787 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2788 | if (!ses->password) | |
2789 | goto get_ses_fail; | |
2790 | } | |
2791 | if (volume_info->domainname) { | |
d3686d54 SP |
2792 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
2793 | if (!ses->domainName) | |
2794 | goto get_ses_fail; | |
36988c76 | 2795 | } |
39566443 GP |
2796 | if (volume_info->domainauto) |
2797 | ses->domainAuto = volume_info->domainauto; | |
3e4b3e1f | 2798 | ses->cred_uid = volume_info->cred_uid; |
36988c76 | 2799 | ses->linux_uid = volume_info->linux_uid; |
d9b94201 | 2800 | |
28e11bd8 JL |
2801 | ses->sectype = volume_info->sectype; |
2802 | ses->sign = volume_info->sign; | |
36988c76 JL |
2803 | |
2804 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
2805 | rc = cifs_negotiate_protocol(xid, ses); |
2806 | if (!rc) | |
2807 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 2808 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 2809 | if (rc) |
36988c76 JL |
2810 | goto get_ses_fail; |
2811 | ||
2812 | /* success, put it on the list */ | |
3f9bcca7 | 2813 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 2814 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 2815 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 | 2816 | |
6d5786a3 | 2817 | free_xid(xid); |
b327a717 AA |
2818 | |
2819 | cifs_setup_ipc(ses, volume_info); | |
2820 | ||
36988c76 JL |
2821 | return ses; |
2822 | ||
2823 | get_ses_fail: | |
2824 | sesInfoFree(ses); | |
6d5786a3 | 2825 | free_xid(xid); |
36988c76 JL |
2826 | return ERR_PTR(rc); |
2827 | } | |
2828 | ||
ae6f8dd4 | 2829 | static int match_tcon(struct cifs_tcon *tcon, struct smb_vol *volume_info) |
37bb04e5 PS |
2830 | { |
2831 | if (tcon->tidStatus == CifsExiting) | |
2832 | return 0; | |
ae6f8dd4 | 2833 | if (strncmp(tcon->treeName, volume_info->UNC, MAX_TREE_SIZE)) |
37bb04e5 | 2834 | return 0; |
ae6f8dd4 PS |
2835 | if (tcon->seal != volume_info->seal) |
2836 | return 0; | |
ae6f8dd4 PS |
2837 | if (tcon->snapshot_time != volume_info->snapshot_time) |
2838 | return 0; | |
37bb04e5 PS |
2839 | return 1; |
2840 | } | |
2841 | ||
96daf2b0 | 2842 | static struct cifs_tcon * |
8b217fe7 | 2843 | cifs_find_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) |
f1987b44 JL |
2844 | { |
2845 | struct list_head *tmp; | |
96daf2b0 | 2846 | struct cifs_tcon *tcon; |
f1987b44 | 2847 | |
3f9bcca7 | 2848 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2849 | list_for_each(tmp, &ses->tcon_list) { |
96daf2b0 | 2850 | tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
ae6f8dd4 | 2851 | if (!match_tcon(tcon, volume_info)) |
f1987b44 | 2852 | continue; |
f1987b44 | 2853 | ++tcon->tc_count; |
3f9bcca7 | 2854 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2855 | return tcon; |
1da177e4 | 2856 | } |
3f9bcca7 | 2857 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2858 | return NULL; |
2859 | } | |
2860 | ||
53e0e11e | 2861 | void |
96daf2b0 | 2862 | cifs_put_tcon(struct cifs_tcon *tcon) |
f1987b44 | 2863 | { |
2e6e02ab | 2864 | unsigned int xid; |
b327a717 | 2865 | struct cifs_ses *ses; |
f1987b44 | 2866 | |
b327a717 AA |
2867 | /* |
2868 | * IPC tcon share the lifetime of their session and are | |
2869 | * destroyed in the session put function | |
2870 | */ | |
2871 | if (tcon == NULL || tcon->ipc) | |
2872 | return; | |
2873 | ||
2874 | ses = tcon->ses; | |
f96637be | 2875 | cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
3f9bcca7 | 2876 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 2877 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 2878 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
2879 | return; |
2880 | } | |
2881 | ||
2882 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 2883 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 | 2884 | |
6d5786a3 | 2885 | xid = get_xid(); |
2e6e02ab PS |
2886 | if (ses->server->ops->tree_disconnect) |
2887 | ses->server->ops->tree_disconnect(xid, tcon); | |
6d5786a3 | 2888 | _free_xid(xid); |
f1987b44 | 2889 | |
d03382ce | 2890 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 2891 | tconInfoFree(tcon); |
f1987b44 JL |
2892 | cifs_put_smb_ses(ses); |
2893 | } | |
2894 | ||
4a1360d0 AA |
2895 | /** |
2896 | * cifs_get_tcon - get a tcon matching @volume_info data from @ses | |
2897 | * | |
2898 | * - tcon refcount is the number of mount points using the tcon. | |
2899 | * - ses refcount is the number of tcon using the session. | |
2900 | * | |
2901 | * 1. This function assumes it is being called from cifs_mount() where | |
2902 | * we already got a session reference (ses refcount +1). | |
2903 | * | |
2904 | * 2. Since we're in the context of adding a mount point, the end | |
2905 | * result should be either: | |
2906 | * | |
2907 | * a) a new tcon already allocated with refcount=1 (1 mount point) and | |
2908 | * its session refcount incremented (1 new tcon). This +1 was | |
2909 | * already done in (1). | |
2910 | * | |
2911 | * b) an existing tcon with refcount+1 (add a mount point to it) and | |
2912 | * identical ses refcount (no new tcon). Because of (1) we need to | |
2913 | * decrement the ses refcount. | |
2914 | */ | |
96daf2b0 SF |
2915 | static struct cifs_tcon * |
2916 | cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) | |
d00c28de JL |
2917 | { |
2918 | int rc, xid; | |
96daf2b0 | 2919 | struct cifs_tcon *tcon; |
d00c28de | 2920 | |
8b217fe7 | 2921 | tcon = cifs_find_tcon(ses, volume_info); |
d00c28de | 2922 | if (tcon) { |
4a1360d0 AA |
2923 | /* |
2924 | * tcon has refcount already incremented but we need to | |
2925 | * decrement extra ses reference gotten by caller (case b) | |
2926 | */ | |
f96637be | 2927 | cifs_dbg(FYI, "Found match on UNC path\n"); |
d00c28de | 2928 | cifs_put_smb_ses(ses); |
d00c28de JL |
2929 | return tcon; |
2930 | } | |
2931 | ||
2e6e02ab PS |
2932 | if (!ses->server->ops->tree_connect) { |
2933 | rc = -ENOSYS; | |
2934 | goto out_fail; | |
2935 | } | |
2936 | ||
d00c28de JL |
2937 | tcon = tconInfoAlloc(); |
2938 | if (tcon == NULL) { | |
2939 | rc = -ENOMEM; | |
2940 | goto out_fail; | |
2941 | } | |
2942 | ||
8b217fe7 | 2943 | if (volume_info->snapshot_time) { |
8b217fe7 SF |
2944 | if (ses->server->vals->protocol_id == 0) { |
2945 | cifs_dbg(VFS, | |
2946 | "Use SMB2 or later for snapshot mount option\n"); | |
2947 | rc = -EOPNOTSUPP; | |
2948 | goto out_fail; | |
2949 | } else | |
2950 | tcon->snapshot_time = volume_info->snapshot_time; | |
8b217fe7 SF |
2951 | } |
2952 | ||
d00c28de JL |
2953 | tcon->ses = ses; |
2954 | if (volume_info->password) { | |
2955 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
2956 | if (!tcon->password) { | |
2957 | rc = -ENOMEM; | |
2958 | goto out_fail; | |
2959 | } | |
2960 | } | |
2961 | ||
2e6e02ab PS |
2962 | /* |
2963 | * BB Do we need to wrap session_mutex around this TCon call and Unix | |
2964 | * SetFS as we do on SessSetup and reconnect? | |
2965 | */ | |
6d5786a3 | 2966 | xid = get_xid(); |
2e6e02ab PS |
2967 | rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon, |
2968 | volume_info->local_nls); | |
6d5786a3 | 2969 | free_xid(xid); |
f96637be | 2970 | cifs_dbg(FYI, "Tcon rc = %d\n", rc); |
d00c28de JL |
2971 | if (rc) |
2972 | goto out_fail; | |
2973 | ||
2974 | if (volume_info->nodfs) { | |
2975 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
f96637be | 2976 | cifs_dbg(FYI, "DFS disabled (%d)\n", tcon->Flags); |
d00c28de | 2977 | } |
b618f001 SF |
2978 | tcon->use_persistent = false; |
2979 | /* check if SMB2 or later, CIFS does not support persistent handles */ | |
2980 | if (volume_info->persistent) { | |
2981 | if (ses->server->vals->protocol_id == 0) { | |
2982 | cifs_dbg(VFS, | |
2983 | "SMB3 or later required for persistent handles\n"); | |
2984 | rc = -EOPNOTSUPP; | |
2985 | goto out_fail; | |
2986 | } else if (ses->server->capabilities & | |
2987 | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) | |
2988 | tcon->use_persistent = true; | |
2989 | else /* persistent handles requested but not supported */ { | |
2990 | cifs_dbg(VFS, | |
2991 | "Persistent handles not supported on share\n"); | |
2992 | rc = -EOPNOTSUPP; | |
2993 | goto out_fail; | |
2994 | } | |
2995 | } else if ((tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) | |
2996 | && (ses->server->capabilities & SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) | |
2997 | && (volume_info->nopersistent == false)) { | |
2998 | cifs_dbg(FYI, "enabling persistent handles\n"); | |
2999 | tcon->use_persistent = true; | |
592fafe6 SF |
3000 | } else if (volume_info->resilient) { |
3001 | if (ses->server->vals->protocol_id == 0) { | |
3002 | cifs_dbg(VFS, | |
3003 | "SMB2.1 or later required for resilient handles\n"); | |
3004 | rc = -EOPNOTSUPP; | |
3005 | goto out_fail; | |
3006 | } | |
3007 | tcon->use_resilient = true; | |
b618f001 SF |
3008 | } |
3009 | ||
ae6f8dd4 PS |
3010 | if (volume_info->seal) { |
3011 | if (ses->server->vals->protocol_id == 0) { | |
3012 | cifs_dbg(VFS, | |
3013 | "SMB3 or later required for encryption\n"); | |
3014 | rc = -EOPNOTSUPP; | |
3015 | goto out_fail; | |
ae6f8dd4 PS |
3016 | } else if (tcon->ses->server->capabilities & |
3017 | SMB2_GLOBAL_CAP_ENCRYPTION) | |
3018 | tcon->seal = true; | |
3019 | else { | |
3020 | cifs_dbg(VFS, "Encryption is not supported on share\n"); | |
3021 | rc = -EOPNOTSUPP; | |
3022 | goto out_fail; | |
ae6f8dd4 PS |
3023 | } |
3024 | } | |
3025 | ||
2e6e02ab PS |
3026 | /* |
3027 | * We can have only one retry value for a connection to a share so for | |
3028 | * resources mounted more than once to the same server share the last | |
3029 | * value passed in for the retry flag is used. | |
3030 | */ | |
d00c28de JL |
3031 | tcon->retry = volume_info->retry; |
3032 | tcon->nocase = volume_info->nocase; | |
3033 | tcon->local_lease = volume_info->local_lease; | |
233839b1 | 3034 | INIT_LIST_HEAD(&tcon->pending_opens); |
d00c28de | 3035 | |
3f9bcca7 | 3036 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 3037 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 3038 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 3039 | |
d03382ce SJ |
3040 | cifs_fscache_get_super_cookie(tcon); |
3041 | ||
d00c28de JL |
3042 | return tcon; |
3043 | ||
3044 | out_fail: | |
3045 | tconInfoFree(tcon); | |
3046 | return ERR_PTR(rc); | |
3047 | } | |
3048 | ||
9d002df4 JL |
3049 | void |
3050 | cifs_put_tlink(struct tcon_link *tlink) | |
3051 | { | |
3052 | if (!tlink || IS_ERR(tlink)) | |
3053 | return; | |
3054 | ||
3055 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
3056 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
3057 | tlink->tl_time = jiffies; | |
3058 | return; | |
3059 | } | |
3060 | ||
3061 | if (!IS_ERR(tlink_tcon(tlink))) | |
3062 | cifs_put_tcon(tlink_tcon(tlink)); | |
3063 | kfree(tlink); | |
3064 | return; | |
3065 | } | |
d00c28de | 3066 | |
25c7f41e | 3067 | static inline struct tcon_link * |
cd51875d PS |
3068 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
3069 | { | |
3070 | return cifs_sb->master_tlink; | |
3071 | } | |
25c7f41e PS |
3072 | |
3073 | static int | |
3074 | compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
3075 | { | |
3076 | struct cifs_sb_info *old = CIFS_SB(sb); | |
3077 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
3078 | ||
3079 | if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) | |
3080 | return 0; | |
3081 | ||
3082 | if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) != | |
3083 | (new->mnt_cifs_flags & CIFS_MOUNT_MASK)) | |
3084 | return 0; | |
3085 | ||
25c7f41e | 3086 | /* |
5eba8ab3 JL |
3087 | * We want to share sb only if we don't specify an r/wsize or |
3088 | * specified r/wsize is greater than or equal to existing one. | |
25c7f41e PS |
3089 | */ |
3090 | if (new->wsize && new->wsize < old->wsize) | |
3091 | return 0; | |
3092 | ||
5eba8ab3 JL |
3093 | if (new->rsize && new->rsize < old->rsize) |
3094 | return 0; | |
3095 | ||
1f68233c | 3096 | if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid)) |
25c7f41e PS |
3097 | return 0; |
3098 | ||
3099 | if (old->mnt_file_mode != new->mnt_file_mode || | |
3100 | old->mnt_dir_mode != new->mnt_dir_mode) | |
3101 | return 0; | |
3102 | ||
3103 | if (strcmp(old->local_nls->charset, new->local_nls->charset)) | |
3104 | return 0; | |
3105 | ||
3106 | if (old->actimeo != new->actimeo) | |
3107 | return 0; | |
3108 | ||
3109 | return 1; | |
3110 | } | |
3111 | ||
c1d8b24d SP |
3112 | static int |
3113 | match_prepath(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
3114 | { | |
3115 | struct cifs_sb_info *old = CIFS_SB(sb); | |
3116 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
cd8c4296 SP |
3117 | bool old_set = old->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH; |
3118 | bool new_set = new->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH; | |
c1d8b24d | 3119 | |
cd8c4296 | 3120 | if (old_set && new_set && !strcmp(new->prepath, old->prepath)) |
c1d8b24d | 3121 | return 1; |
cd8c4296 SP |
3122 | else if (!old_set && !new_set) |
3123 | return 1; | |
3124 | ||
c1d8b24d SP |
3125 | return 0; |
3126 | } | |
3127 | ||
25c7f41e PS |
3128 | int |
3129 | cifs_match_super(struct super_block *sb, void *data) | |
3130 | { | |
3131 | struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; | |
3132 | struct smb_vol *volume_info; | |
3133 | struct cifs_sb_info *cifs_sb; | |
3134 | struct TCP_Server_Info *tcp_srv; | |
96daf2b0 SF |
3135 | struct cifs_ses *ses; |
3136 | struct cifs_tcon *tcon; | |
25c7f41e | 3137 | struct tcon_link *tlink; |
25c7f41e PS |
3138 | int rc = 0; |
3139 | ||
25c7f41e PS |
3140 | spin_lock(&cifs_tcp_ses_lock); |
3141 | cifs_sb = CIFS_SB(sb); | |
3142 | tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
3143 | if (IS_ERR(tlink)) { | |
3144 | spin_unlock(&cifs_tcp_ses_lock); | |
3145 | return rc; | |
3146 | } | |
3147 | tcon = tlink_tcon(tlink); | |
3148 | ses = tcon->ses; | |
3149 | tcp_srv = ses->server; | |
3150 | ||
3151 | volume_info = mnt_data->vol; | |
3152 | ||
9fa114f7 | 3153 | if (!match_server(tcp_srv, volume_info) || |
25c7f41e | 3154 | !match_session(ses, volume_info) || |
ae6f8dd4 | 3155 | !match_tcon(tcon, volume_info) || |
c1d8b24d | 3156 | !match_prepath(sb, mnt_data)) { |
25c7f41e PS |
3157 | rc = 0; |
3158 | goto out; | |
3159 | } | |
3160 | ||
3161 | rc = compare_mount_options(sb, mnt_data); | |
3162 | out: | |
25c7f41e | 3163 | spin_unlock(&cifs_tcp_ses_lock); |
f484b5d0 | 3164 | cifs_put_tlink(tlink); |
25c7f41e PS |
3165 | return rc; |
3166 | } | |
3167 | ||
1da177e4 | 3168 | int |
b669f33c | 3169 | get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path, |
2e6e02ab PS |
3170 | const struct nls_table *nls_codepage, unsigned int *num_referrals, |
3171 | struct dfs_info3_param **referrals, int remap) | |
1da177e4 | 3172 | { |
1da177e4 LT |
3173 | int rc = 0; |
3174 | ||
b327a717 | 3175 | if (!ses->server->ops->get_dfs_refer) |
2e6e02ab PS |
3176 | return -ENOSYS; |
3177 | ||
3178 | *num_referrals = 0; | |
3179 | *referrals = NULL; | |
1da177e4 | 3180 | |
b327a717 AA |
3181 | rc = ses->server->ops->get_dfs_refer(xid, ses, old_path, |
3182 | referrals, num_referrals, | |
3183 | nls_codepage, remap); | |
1da177e4 LT |
3184 | return rc; |
3185 | } | |
3186 | ||
09e50d55 JL |
3187 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
3188 | static struct lock_class_key cifs_key[2]; | |
3189 | static struct lock_class_key cifs_slock_key[2]; | |
3190 | ||
3191 | static inline void | |
3192 | cifs_reclassify_socket4(struct socket *sock) | |
3193 | { | |
3194 | struct sock *sk = sock->sk; | |
fafc4e1e | 3195 | BUG_ON(!sock_allow_reclassification(sk)); |
09e50d55 JL |
3196 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", |
3197 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
3198 | } | |
3199 | ||
3200 | static inline void | |
3201 | cifs_reclassify_socket6(struct socket *sock) | |
3202 | { | |
3203 | struct sock *sk = sock->sk; | |
fafc4e1e | 3204 | BUG_ON(!sock_allow_reclassification(sk)); |
09e50d55 JL |
3205 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", |
3206 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
3207 | } | |
3208 | #else | |
3209 | static inline void | |
3210 | cifs_reclassify_socket4(struct socket *sock) | |
3211 | { | |
3212 | } | |
3213 | ||
3214 | static inline void | |
3215 | cifs_reclassify_socket6(struct socket *sock) | |
3216 | { | |
3217 | } | |
3218 | #endif | |
3219 | ||
1da177e4 | 3220 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 3221 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 3222 | { |
50c2f753 | 3223 | unsigned int i, j; |
1da177e4 | 3224 | |
50c2f753 | 3225 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
3226 | /* mask a nibble at a time and encode */ |
3227 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
3228 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 3229 | j += 2; |
1da177e4 LT |
3230 | } |
3231 | ||
3232 | } | |
3233 | ||
3eb9a889 BG |
3234 | static int |
3235 | bind_socket(struct TCP_Server_Info *server) | |
3236 | { | |
3237 | int rc = 0; | |
3238 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
3239 | /* Bind to the specified local IP address */ | |
3240 | struct socket *socket = server->ssocket; | |
3241 | rc = socket->ops->bind(socket, | |
3242 | (struct sockaddr *) &server->srcaddr, | |
3243 | sizeof(server->srcaddr)); | |
3244 | if (rc < 0) { | |
3245 | struct sockaddr_in *saddr4; | |
3246 | struct sockaddr_in6 *saddr6; | |
3247 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
3248 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
3249 | if (saddr6->sin6_family == AF_INET6) | |
f96637be JP |
3250 | cifs_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n", |
3251 | &saddr6->sin6_addr, rc); | |
3eb9a889 | 3252 | else |
f96637be JP |
3253 | cifs_dbg(VFS, "Failed to bind to: %pI4, error: %d\n", |
3254 | &saddr4->sin_addr.s_addr, rc); | |
3eb9a889 BG |
3255 | } |
3256 | } | |
3257 | return rc; | |
3258 | } | |
1da177e4 LT |
3259 | |
3260 | static int | |
a9f1b85e | 3261 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
3262 | { |
3263 | int rc = 0; | |
a9f1b85e PS |
3264 | /* |
3265 | * some servers require RFC1001 sessinit before sending | |
3266 | * negprot - BB check reconnection in case where second | |
3267 | * sessinit is sent but no second negprot | |
3268 | */ | |
3269 | struct rfc1002_session_packet *ses_init_buf; | |
3270 | struct smb_hdr *smb_buf; | |
3271 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
3272 | GFP_KERNEL); | |
3273 | if (ses_init_buf) { | |
3274 | ses_init_buf->trailer.session_req.called_len = 32; | |
3275 | ||
997152f6 | 3276 | if (server->server_RFC1001_name[0] != 0) |
a9f1b85e PS |
3277 | rfc1002mangle(ses_init_buf->trailer. |
3278 | session_req.called_name, | |
3279 | server->server_RFC1001_name, | |
3280 | RFC1001_NAME_LEN_WITH_NULL); | |
3281 | else | |
3282 | rfc1002mangle(ses_init_buf->trailer. | |
3283 | session_req.called_name, | |
3284 | DEFAULT_CIFS_CALLED_NAME, | |
3285 | RFC1001_NAME_LEN_WITH_NULL); | |
3286 | ||
3287 | ses_init_buf->trailer.session_req.calling_len = 32; | |
3288 | ||
3289 | /* | |
3290 | * calling name ends in null (byte 16) from old smb | |
3291 | * convention. | |
3292 | */ | |
c85c35f8 | 3293 | if (server->workstation_RFC1001_name[0] != 0) |
a9f1b85e PS |
3294 | rfc1002mangle(ses_init_buf->trailer. |
3295 | session_req.calling_name, | |
3296 | server->workstation_RFC1001_name, | |
3297 | RFC1001_NAME_LEN_WITH_NULL); | |
3298 | else | |
3299 | rfc1002mangle(ses_init_buf->trailer. | |
3300 | session_req.calling_name, | |
3301 | "LINUX_CIFS_CLNT", | |
3302 | RFC1001_NAME_LEN_WITH_NULL); | |
3303 | ||
3304 | ses_init_buf->trailer.session_req.scope1 = 0; | |
3305 | ses_init_buf->trailer.session_req.scope2 = 0; | |
3306 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
3307 | ||
3308 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
be8e3b00 | 3309 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
a9f1b85e PS |
3310 | rc = smb_send(server, smb_buf, 0x44); |
3311 | kfree(ses_init_buf); | |
3312 | /* | |
3313 | * RFC1001 layer in at least one server | |
3314 | * requires very short break before negprot | |
3315 | * presumably because not expecting negprot | |
3316 | * to follow so fast. This is a simple | |
3317 | * solution that works without | |
3318 | * complicating the code and causes no | |
3319 | * significant slowing down on mount | |
3320 | * for everyone else | |
3321 | */ | |
3322 | usleep_range(1000, 2000); | |
3323 | } | |
3324 | /* | |
3325 | * else the negprot may still work without this | |
3326 | * even though malloc failed | |
3327 | */ | |
3328 | ||
3329 | return rc; | |
3330 | } | |
3331 | ||
3332 | static int | |
3333 | generic_ip_connect(struct TCP_Server_Info *server) | |
3334 | { | |
3335 | int rc = 0; | |
6da97910 | 3336 | __be16 sport; |
a9f1b85e | 3337 | int slen, sfamily; |
bcf4b106 | 3338 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
3339 | struct sockaddr *saddr; |
3340 | ||
3341 | saddr = (struct sockaddr *) &server->dstaddr; | |
3342 | ||
3343 | if (server->dstaddr.ss_family == AF_INET6) { | |
3344 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
3345 | slen = sizeof(struct sockaddr_in6); | |
3346 | sfamily = AF_INET6; | |
3347 | } else { | |
3348 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
3349 | slen = sizeof(struct sockaddr_in); | |
3350 | sfamily = AF_INET; | |
3351 | } | |
1da177e4 | 3352 | |
bcf4b106 | 3353 | if (socket == NULL) { |
f1d0c998 RL |
3354 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
3355 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 3356 | if (rc < 0) { |
f96637be | 3357 | cifs_dbg(VFS, "Error %d creating socket\n", rc); |
a9f1b85e | 3358 | server->ssocket = NULL; |
1da177e4 | 3359 | return rc; |
1da177e4 | 3360 | } |
bcf4b106 JL |
3361 | |
3362 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
f96637be | 3363 | cifs_dbg(FYI, "Socket created\n"); |
bcf4b106 JL |
3364 | server->ssocket = socket; |
3365 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
3366 | if (sfamily == AF_INET6) |
3367 | cifs_reclassify_socket6(socket); | |
3368 | else | |
3369 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
3370 | } |
3371 | ||
3eb9a889 BG |
3372 | rc = bind_socket(server); |
3373 | if (rc < 0) | |
3374 | return rc; | |
3375 | ||
bcf4b106 JL |
3376 | /* |
3377 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
3378 | * the default. sock_setsockopt not used because it expects |
3379 | * user space buffer | |
bcf4b106 JL |
3380 | */ |
3381 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 3382 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 3383 | |
b387eaeb | 3384 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
3385 | if (server->noautotune) { |
3386 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
3387 | socket->sk->sk_sndbuf = 200 * 1024; | |
3388 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
3389 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 3390 | } |
1da177e4 | 3391 | |
6a5fa236 | 3392 | if (server->tcp_nodelay) { |
a9f1b85e | 3393 | int val = 1; |
6a5fa236 SF |
3394 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
3395 | (char *)&val, sizeof(val)); | |
3396 | if (rc) | |
f96637be JP |
3397 | cifs_dbg(FYI, "set TCP_NODELAY socket option error %d\n", |
3398 | rc); | |
6a5fa236 SF |
3399 | } |
3400 | ||
f96637be | 3401 | cifs_dbg(FYI, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n", |
bcf4b106 | 3402 | socket->sk->sk_sndbuf, |
b6b38f70 | 3403 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 3404 | |
ee1b3ea9 JL |
3405 | rc = socket->ops->connect(socket, saddr, slen, 0); |
3406 | if (rc < 0) { | |
f96637be | 3407 | cifs_dbg(FYI, "Error %d connecting to server\n", rc); |
ee1b3ea9 JL |
3408 | sock_release(socket); |
3409 | server->ssocket = NULL; | |
3410 | return rc; | |
3411 | } | |
3412 | ||
a9f1b85e PS |
3413 | if (sport == htons(RFC1001_PORT)) |
3414 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 3415 | |
1da177e4 LT |
3416 | return rc; |
3417 | } | |
3418 | ||
3419 | static int | |
a9f1b85e | 3420 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 3421 | { |
6da97910 | 3422 | __be16 *sport; |
a9f1b85e PS |
3423 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
3424 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 3425 | |
a9f1b85e PS |
3426 | if (server->dstaddr.ss_family == AF_INET6) |
3427 | sport = &addr6->sin6_port; | |
3428 | else | |
3429 | sport = &addr->sin_port; | |
1da177e4 | 3430 | |
a9f1b85e PS |
3431 | if (*sport == 0) { |
3432 | int rc; | |
1da177e4 | 3433 | |
a9f1b85e PS |
3434 | /* try with 445 port at first */ |
3435 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 3436 | |
a9f1b85e | 3437 | rc = generic_ip_connect(server); |
1da177e4 | 3438 | if (rc >= 0) |
a9f1b85e | 3439 | return rc; |
6a5fa236 | 3440 | |
a9f1b85e PS |
3441 | /* if it failed, try with 139 port */ |
3442 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
3443 | } |
3444 | ||
a9f1b85e | 3445 | return generic_ip_connect(server); |
1da177e4 LT |
3446 | } |
3447 | ||
6d5786a3 | 3448 | void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon, |
2c6292ae | 3449 | struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) |
8af18971 SF |
3450 | { |
3451 | /* if we are reconnecting then should we check to see if | |
3452 | * any requested capabilities changed locally e.g. via | |
3453 | * remount but we can not do much about it here | |
3454 | * if they have (even if we could detect it by the following) | |
3455 | * Perhaps we could add a backpointer to array of sb from tcon | |
3456 | * or if we change to make all sb to same share the same | |
3457 | * sb as NFS - then we only have one backpointer to sb. | |
3458 | * What if we wanted to mount the server share twice once with | |
3459 | * and once without posixacls or posix paths? */ | |
3460 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 3461 | |
c18c842b SF |
3462 | if (vol_info && vol_info->no_linux_ext) { |
3463 | tcon->fsUnixInfo.Capability = 0; | |
3464 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
f96637be | 3465 | cifs_dbg(FYI, "Linux protocol extensions disabled\n"); |
c18c842b SF |
3466 | return; |
3467 | } else if (vol_info) | |
3468 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
3469 | ||
3470 | if (tcon->unix_ext == 0) { | |
f96637be | 3471 | cifs_dbg(FYI, "Unix extensions disabled so not set on reconnect\n"); |
c18c842b SF |
3472 | return; |
3473 | } | |
50c2f753 | 3474 | |
fb8c4b14 | 3475 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 3476 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
f96637be | 3477 | cifs_dbg(FYI, "unix caps which server supports %lld\n", cap); |
8af18971 SF |
3478 | /* check for reconnect case in which we do not |
3479 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 3480 | if (vol_info == NULL) { |
50c2f753 | 3481 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
3482 | originally at mount time */ |
3483 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
3484 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
3485 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
3486 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
f96637be | 3487 | cifs_dbg(VFS, "POSIXPATH support change\n"); |
8af18971 | 3488 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 3489 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
f96637be JP |
3490 | cifs_dbg(VFS, "possible reconnect error\n"); |
3491 | cifs_dbg(VFS, "server disabled POSIX path support\n"); | |
11b6d645 | 3492 | } |
8af18971 | 3493 | } |
50c2f753 | 3494 | |
6848b733 | 3495 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
f96637be | 3496 | cifs_dbg(VFS, "per-share encryption not supported yet\n"); |
6848b733 | 3497 | |
8af18971 | 3498 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 3499 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 3500 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 3501 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
f96637be | 3502 | cifs_dbg(FYI, "negotiated posix acl support\n"); |
2c6292ae AV |
3503 | if (cifs_sb) |
3504 | cifs_sb->mnt_cifs_flags |= | |
3505 | CIFS_MOUNT_POSIXACL; | |
8af18971 SF |
3506 | } |
3507 | ||
75865f8c | 3508 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 3509 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 3510 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
f96637be | 3511 | cifs_dbg(FYI, "negotiate posix pathnames\n"); |
2c6292ae AV |
3512 | if (cifs_sb) |
3513 | cifs_sb->mnt_cifs_flags |= | |
8af18971 SF |
3514 | CIFS_MOUNT_POSIX_PATHS; |
3515 | } | |
50c2f753 | 3516 | |
f96637be | 3517 | cifs_dbg(FYI, "Negotiate caps 0x%x\n", (int)cap); |
8af18971 | 3518 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 3519 | if (cap & CIFS_UNIX_FCNTL_CAP) |
f96637be | 3520 | cifs_dbg(FYI, "FCNTL cap\n"); |
75865f8c | 3521 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
f96637be | 3522 | cifs_dbg(FYI, "EXTATTR cap\n"); |
75865f8c | 3523 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
f96637be | 3524 | cifs_dbg(FYI, "POSIX path cap\n"); |
75865f8c | 3525 | if (cap & CIFS_UNIX_XATTR_CAP) |
f96637be | 3526 | cifs_dbg(FYI, "XATTR cap\n"); |
75865f8c | 3527 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
f96637be | 3528 | cifs_dbg(FYI, "POSIX ACL cap\n"); |
75865f8c | 3529 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
f96637be | 3530 | cifs_dbg(FYI, "very large read cap\n"); |
75865f8c | 3531 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
f96637be | 3532 | cifs_dbg(FYI, "very large write cap\n"); |
6848b733 | 3533 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
f96637be | 3534 | cifs_dbg(FYI, "transport encryption cap\n"); |
6848b733 | 3535 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
f96637be | 3536 | cifs_dbg(FYI, "mandatory transport encryption cap\n"); |
8af18971 SF |
3537 | #endif /* CIFS_DEBUG2 */ |
3538 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 3539 | if (vol_info == NULL) { |
f96637be | 3540 | cifs_dbg(FYI, "resetting capabilities failed\n"); |
442aa310 | 3541 | } else |
f96637be | 3542 | cifs_dbg(VFS, "Negotiating Unix capabilities with the server failed. Consider mounting with the Unix Extensions disabled if problems are found by specifying the nounix mount option.\n"); |
5a44b319 | 3543 | |
8af18971 SF |
3544 | } |
3545 | } | |
3546 | } | |
3547 | ||
4214ebf4 | 3548 | int cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
724d9f1c | 3549 | struct cifs_sb_info *cifs_sb) |
b1c8d2b4 | 3550 | { |
2de970ff JL |
3551 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
3552 | ||
2ced6f69 AV |
3553 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
3554 | cifs_sb->tlink_tree = RB_ROOT; | |
3555 | ||
25c7f41e | 3556 | /* |
5eba8ab3 JL |
3557 | * Temporarily set r/wsize for matching superblock. If we end up using |
3558 | * new sb then client will later negotiate it downward if needed. | |
25c7f41e | 3559 | */ |
5eba8ab3 | 3560 | cifs_sb->rsize = pvolume_info->rsize; |
25c7f41e PS |
3561 | cifs_sb->wsize = pvolume_info->wsize; |
3562 | ||
3b795210 SF |
3563 | cifs_sb->mnt_uid = pvolume_info->linux_uid; |
3564 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
3565 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
3566 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
f96637be JP |
3567 | cifs_dbg(FYI, "file mode: 0x%hx dir mode: 0x%hx\n", |
3568 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); | |
3b795210 | 3569 | |
6d20e840 | 3570 | cifs_sb->actimeo = pvolume_info->actimeo; |
724d9f1c | 3571 | cifs_sb->local_nls = pvolume_info->local_nls; |
6d20e840 | 3572 | |
3b795210 SF |
3573 | if (pvolume_info->noperm) |
3574 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
3575 | if (pvolume_info->setuids) | |
3576 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
95932655 SF |
3577 | if (pvolume_info->setuidfromacl) |
3578 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UID_FROM_ACL; | |
3b795210 SF |
3579 | if (pvolume_info->server_ino) |
3580 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
3581 | if (pvolume_info->remap) | |
2baa2682 SF |
3582 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SFM_CHR; |
3583 | if (pvolume_info->sfu_remap) | |
3b795210 SF |
3584 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; |
3585 | if (pvolume_info->no_xattr) | |
3586 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
3587 | if (pvolume_info->sfu_emul) | |
3588 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
3589 | if (pvolume_info->nobrl) | |
3590 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 3591 | if (pvolume_info->nostrictsync) |
4717bed6 | 3592 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
3593 | if (pvolume_info->mand_lock) |
3594 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
d4ffff1f PS |
3595 | if (pvolume_info->rwpidforward) |
3596 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; | |
3b795210 SF |
3597 | if (pvolume_info->cifs_acl) |
3598 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
3c7c87fd | 3599 | if (pvolume_info->backupuid_specified) { |
3d3ea8e6 | 3600 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; |
3c7c87fd SP |
3601 | cifs_sb->mnt_backupuid = pvolume_info->backupuid; |
3602 | } | |
3603 | if (pvolume_info->backupgid_specified) { | |
3d3ea8e6 | 3604 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; |
3c7c87fd SP |
3605 | cifs_sb->mnt_backupgid = pvolume_info->backupgid; |
3606 | } | |
3b795210 SF |
3607 | if (pvolume_info->override_uid) |
3608 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
3609 | if (pvolume_info->override_gid) | |
3610 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
3611 | if (pvolume_info->dynperm) | |
3612 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
3613 | if (pvolume_info->fsc) |
3614 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
3615 | if (pvolume_info->multiuser) |
3616 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
3617 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
3618 | if (pvolume_info->strict_io) |
3619 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 3620 | if (pvolume_info->direct_io) { |
f96637be | 3621 | cifs_dbg(FYI, "mounting share using direct i/o\n"); |
3b795210 SF |
3622 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
3623 | } | |
736a3320 SM |
3624 | if (pvolume_info->mfsymlinks) { |
3625 | if (pvolume_info->sfu_emul) { | |
db8b631d SF |
3626 | /* |
3627 | * Our SFU ("Services for Unix" emulation does not allow | |
3628 | * creating symlinks but does allow reading existing SFU | |
3629 | * symlinks (it does allow both creating and reading SFU | |
3630 | * style mknod and FIFOs though). When "mfsymlinks" and | |
3631 | * "sfu" are both enabled at the same time, it allows | |
3632 | * reading both types of symlinks, but will only create | |
3633 | * them with mfsymlinks format. This allows better | |
3634 | * Apple compatibility (probably better for Samba too) | |
3635 | * while still recognizing old Windows style symlinks. | |
3636 | */ | |
3637 | cifs_dbg(VFS, "mount options mfsymlinks and sfu both enabled\n"); | |
736a3320 | 3638 | } |
db8b631d | 3639 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; |
736a3320 | 3640 | } |
3b795210 SF |
3641 | |
3642 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
f96637be | 3643 | cifs_dbg(VFS, "mount option dynperm ignored if cifsacl mount option supported\n"); |
4214ebf4 SP |
3644 | |
3645 | if (pvolume_info->prepath) { | |
3646 | cifs_sb->prepath = kstrdup(pvolume_info->prepath, GFP_KERNEL); | |
3647 | if (cifs_sb->prepath == NULL) | |
3648 | return -ENOMEM; | |
3649 | } | |
3650 | ||
3651 | return 0; | |
b1c8d2b4 JL |
3652 | } |
3653 | ||
b9bce2e9 JL |
3654 | static void |
3655 | cleanup_volume_info_contents(struct smb_vol *volume_info) | |
1bfe73c2 | 3656 | { |
b946845a | 3657 | kfree(volume_info->username); |
1bfe73c2 | 3658 | kzfree(volume_info->password); |
95c75454 | 3659 | kfree(volume_info->UNC); |
b946845a SF |
3660 | kfree(volume_info->domainname); |
3661 | kfree(volume_info->iocharset); | |
1bfe73c2 | 3662 | kfree(volume_info->prepath); |
b9bce2e9 JL |
3663 | } |
3664 | ||
3665 | void | |
3666 | cifs_cleanup_volume_info(struct smb_vol *volume_info) | |
3667 | { | |
3668 | if (!volume_info) | |
3669 | return; | |
3670 | cleanup_volume_info_contents(volume_info); | |
1bfe73c2 | 3671 | kfree(volume_info); |
1bfe73c2 IM |
3672 | } |
3673 | ||
b9bce2e9 | 3674 | |
2d6d589d | 3675 | #ifdef CONFIG_CIFS_DFS_UPCALL |
6d3ea7e4 SF |
3676 | /* |
3677 | * cifs_build_path_to_root returns full path to root when we do not have an | |
3678 | * exiting connection (tcon) | |
3679 | */ | |
1bfe73c2 | 3680 | static char * |
b2a0fa15 | 3681 | build_unc_path_to_root(const struct smb_vol *vol, |
1bfe73c2 IM |
3682 | const struct cifs_sb_info *cifs_sb) |
3683 | { | |
b2a0fa15 | 3684 | char *full_path, *pos; |
839db3d1 | 3685 | unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0; |
b2a0fa15 | 3686 | unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); |
1bfe73c2 | 3687 | |
b2a0fa15 | 3688 | full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); |
1bfe73c2 IM |
3689 | if (full_path == NULL) |
3690 | return ERR_PTR(-ENOMEM); | |
3691 | ||
b2a0fa15 JL |
3692 | strncpy(full_path, vol->UNC, unc_len); |
3693 | pos = full_path + unc_len; | |
3694 | ||
3695 | if (pplen) { | |
1fc29bac JL |
3696 | *pos = CIFS_DIR_SEP(cifs_sb); |
3697 | strncpy(pos + 1, vol->prepath, pplen); | |
b2a0fa15 JL |
3698 | pos += pplen; |
3699 | } | |
3700 | ||
3701 | *pos = '\0'; /* add trailing null */ | |
f87d39d9 | 3702 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
f96637be | 3703 | cifs_dbg(FYI, "%s: full_path=%s\n", __func__, full_path); |
1bfe73c2 IM |
3704 | return full_path; |
3705 | } | |
dd613945 SF |
3706 | |
3707 | /* | |
3708 | * Perform a dfs referral query for a share and (optionally) prefix | |
3709 | * | |
046462ab SF |
3710 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
3711 | * to a string containing updated options for the submount. Otherwise it | |
3712 | * will be left untouched. | |
dd613945 SF |
3713 | * |
3714 | * Returns the rc from get_dfs_path to the caller, which can be used to | |
3715 | * determine whether there were referrals. | |
3716 | */ | |
3717 | static int | |
b669f33c | 3718 | expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses, |
dd613945 | 3719 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, |
046462ab | 3720 | int check_prefix) |
dd613945 SF |
3721 | { |
3722 | int rc; | |
3723 | unsigned int num_referrals = 0; | |
3724 | struct dfs_info3_param *referrals = NULL; | |
3725 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; | |
3726 | ||
3727 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
3728 | if (IS_ERR(full_path)) | |
3729 | return PTR_ERR(full_path); | |
3730 | ||
3731 | /* For DFS paths, skip the first '\' of the UNC */ | |
3732 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; | |
3733 | ||
b669f33c | 3734 | rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls, |
2baa2682 | 3735 | &num_referrals, &referrals, cifs_remap(cifs_sb)); |
dd613945 SF |
3736 | |
3737 | if (!rc && num_referrals > 0) { | |
3738 | char *fake_devname = NULL; | |
3739 | ||
3740 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, | |
3741 | full_path + 1, referrals, | |
3742 | &fake_devname); | |
3743 | ||
3744 | free_dfs_info_array(referrals, num_referrals); | |
046462ab | 3745 | |
dd613945 SF |
3746 | if (IS_ERR(mdata)) { |
3747 | rc = PTR_ERR(mdata); | |
3748 | mdata = NULL; | |
b9bce2e9 JL |
3749 | } else { |
3750 | cleanup_volume_info_contents(volume_info); | |
b9bce2e9 JL |
3751 | rc = cifs_setup_volume_info(volume_info, mdata, |
3752 | fake_devname); | |
dd613945 | 3753 | } |
b9bce2e9 JL |
3754 | kfree(fake_devname); |
3755 | kfree(cifs_sb->mountdata); | |
046462ab | 3756 | cifs_sb->mountdata = mdata; |
dd613945 SF |
3757 | } |
3758 | kfree(full_path); | |
3759 | return rc; | |
3760 | } | |
2d6d589d | 3761 | #endif |
1bfe73c2 | 3762 | |
04db79b0 JL |
3763 | static int |
3764 | cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, | |
3765 | const char *devname) | |
1da177e4 | 3766 | { |
724d9f1c | 3767 | int rc = 0; |
1da177e4 | 3768 | |
04db79b0 JL |
3769 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) |
3770 | return -EINVAL; | |
1da177e4 | 3771 | |
7586b765 | 3772 | if (volume_info->nullauth) { |
f96637be | 3773 | cifs_dbg(FYI, "Anonymous login\n"); |
04febabc JL |
3774 | kfree(volume_info->username); |
3775 | volume_info->username = NULL; | |
7586b765 | 3776 | } else if (volume_info->username) { |
1da177e4 | 3777 | /* BB fixme parse for domain name here */ |
f96637be | 3778 | cifs_dbg(FYI, "Username: %s\n", volume_info->username); |
1da177e4 | 3779 | } else { |
f96637be | 3780 | cifs_dbg(VFS, "No username specified\n"); |
50c2f753 SF |
3781 | /* In userspace mount helper we can get user name from alternate |
3782 | locations such as env variables and files on disk */ | |
04db79b0 | 3783 | return -EINVAL; |
1da177e4 LT |
3784 | } |
3785 | ||
1da177e4 | 3786 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 3787 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
3788 | /* load_nls_default cannot return null */ |
3789 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 3790 | } else { |
a5fc4ce0 JL |
3791 | volume_info->local_nls = load_nls(volume_info->iocharset); |
3792 | if (volume_info->local_nls == NULL) { | |
f96637be | 3793 | cifs_dbg(VFS, "CIFS mount error: iocharset %s not found\n", |
b6b38f70 | 3794 | volume_info->iocharset); |
04db79b0 | 3795 | return -ELIBACC; |
1da177e4 LT |
3796 | } |
3797 | } | |
724d9f1c | 3798 | |
724d9f1c PS |
3799 | return rc; |
3800 | } | |
3801 | ||
04db79b0 JL |
3802 | struct smb_vol * |
3803 | cifs_get_volume_info(char *mount_data, const char *devname) | |
3804 | { | |
3805 | int rc; | |
3806 | struct smb_vol *volume_info; | |
3807 | ||
6ee9542a | 3808 | volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL); |
04db79b0 JL |
3809 | if (!volume_info) |
3810 | return ERR_PTR(-ENOMEM); | |
3811 | ||
3812 | rc = cifs_setup_volume_info(volume_info, mount_data, devname); | |
3813 | if (rc) { | |
3814 | cifs_cleanup_volume_info(volume_info); | |
3815 | volume_info = ERR_PTR(rc); | |
3816 | } | |
3817 | ||
3818 | return volume_info; | |
3819 | } | |
3820 | ||
a6b5058f AA |
3821 | static int |
3822 | cifs_are_all_path_components_accessible(struct TCP_Server_Info *server, | |
3823 | unsigned int xid, | |
3824 | struct cifs_tcon *tcon, | |
3825 | struct cifs_sb_info *cifs_sb, | |
3826 | char *full_path) | |
3827 | { | |
3828 | int rc; | |
3829 | char *s; | |
3830 | char sep, tmp; | |
3831 | ||
3832 | sep = CIFS_DIR_SEP(cifs_sb); | |
3833 | s = full_path; | |
3834 | ||
3835 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, ""); | |
3836 | while (rc == 0) { | |
3837 | /* skip separators */ | |
3838 | while (*s == sep) | |
3839 | s++; | |
3840 | if (!*s) | |
3841 | break; | |
3842 | /* next separator */ | |
3843 | while (*s && *s != sep) | |
3844 | s++; | |
3845 | ||
3846 | /* | |
3847 | * temporarily null-terminate the path at the end of | |
3848 | * the current component | |
3849 | */ | |
3850 | tmp = *s; | |
3851 | *s = 0; | |
3852 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, | |
3853 | full_path); | |
3854 | *s = tmp; | |
3855 | } | |
3856 | return rc; | |
3857 | } | |
3858 | ||
724d9f1c | 3859 | int |
2c6292ae | 3860 | cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) |
724d9f1c | 3861 | { |
1daaae8f | 3862 | int rc; |
6d5786a3 | 3863 | unsigned int xid; |
af4281dc | 3864 | struct cifs_ses *ses; |
96daf2b0 | 3865 | struct cifs_tcon *tcon; |
af4281dc | 3866 | struct TCP_Server_Info *server; |
724d9f1c PS |
3867 | char *full_path; |
3868 | struct tcon_link *tlink; | |
3869 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
3870 | int referral_walks_count = 0; | |
20547490 | 3871 | #endif |
dd854466 | 3872 | |
20547490 | 3873 | #ifdef CONFIG_CIFS_DFS_UPCALL |
724d9f1c PS |
3874 | try_mount_again: |
3875 | /* cleanup activities if we're chasing a referral */ | |
3876 | if (referral_walks_count) { | |
3877 | if (tcon) | |
3878 | cifs_put_tcon(tcon); | |
af4281dc PS |
3879 | else if (ses) |
3880 | cifs_put_smb_ses(ses); | |
724d9f1c | 3881 | |
1dfd18d0 SP |
3882 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_POSIX_PATHS; |
3883 | ||
6d5786a3 | 3884 | free_xid(xid); |
724d9f1c PS |
3885 | } |
3886 | #endif | |
1daaae8f | 3887 | rc = 0; |
724d9f1c | 3888 | tcon = NULL; |
af4281dc PS |
3889 | ses = NULL; |
3890 | server = NULL; | |
724d9f1c PS |
3891 | full_path = NULL; |
3892 | tlink = NULL; | |
3893 | ||
6d5786a3 | 3894 | xid = get_xid(); |
1da177e4 | 3895 | |
63c038c2 | 3896 | /* get a reference to a tcp session */ |
af4281dc PS |
3897 | server = cifs_get_tcp_session(volume_info); |
3898 | if (IS_ERR(server)) { | |
3899 | rc = PTR_ERR(server); | |
63c038c2 | 3900 | goto out; |
1da177e4 | 3901 | } |
141891f4 SF |
3902 | if ((volume_info->max_credits < 20) || |
3903 | (volume_info->max_credits > 60000)) | |
3904 | server->max_credits = SMB2_MAX_CREDITS_AVAILABLE; | |
3905 | else | |
3906 | server->max_credits = volume_info->max_credits; | |
36988c76 | 3907 | /* get a reference to a SMB session */ |
af4281dc PS |
3908 | ses = cifs_get_smb_ses(server, volume_info); |
3909 | if (IS_ERR(ses)) { | |
3910 | rc = PTR_ERR(ses); | |
3911 | ses = NULL; | |
36988c76 | 3912 | goto mount_fail_check; |
1da177e4 | 3913 | } |
50c2f753 | 3914 | |
b618f001 SF |
3915 | if ((volume_info->persistent == true) && ((ses->server->capabilities & |
3916 | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) == 0)) { | |
3917 | cifs_dbg(VFS, "persistent handles not supported by server\n"); | |
3918 | rc = -EOPNOTSUPP; | |
3919 | goto mount_fail_check; | |
3920 | } | |
592fafe6 | 3921 | |
d00c28de | 3922 | /* search for existing tcon to this server share */ |
af4281dc | 3923 | tcon = cifs_get_tcon(ses, volume_info); |
d00c28de JL |
3924 | if (IS_ERR(tcon)) { |
3925 | rc = PTR_ERR(tcon); | |
3926 | tcon = NULL; | |
40920c2b MS |
3927 | if (rc == -EACCES) |
3928 | goto mount_fail_check; | |
3929 | ||
1bfe73c2 | 3930 | goto remote_path_check; |
d00c28de | 3931 | } |
1bfe73c2 | 3932 | |
d82c2df5 | 3933 | /* tell server which Unix caps we support */ |
29e20f9c | 3934 | if (cap_unix(tcon->ses)) { |
d82c2df5 SF |
3935 | /* reset of caps checks mount to see if unix extensions |
3936 | disabled for just this mount */ | |
2c6292ae | 3937 | reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info); |
6848b733 SF |
3938 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && |
3939 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & | |
3940 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) { | |
3941 | rc = -EACCES; | |
3942 | goto mount_fail_check; | |
3943 | } | |
3944 | } else | |
d82c2df5 | 3945 | tcon->unix_ext = 0; /* server does not support them */ |
c18c842b | 3946 | |
af4281dc | 3947 | /* do not care if a following call succeed - informational */ |
b327a717 | 3948 | if (!tcon->pipe && server->ops->qfs_tcon) |
af4281dc | 3949 | server->ops->qfs_tcon(xid, tcon); |
6848b733 | 3950 | |
24985c53 PS |
3951 | cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info); |
3952 | cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info); | |
f7910cbd | 3953 | |
1bfe73c2 | 3954 | remote_path_check: |
c1508ca2 SF |
3955 | #ifdef CONFIG_CIFS_DFS_UPCALL |
3956 | /* | |
3957 | * Perform an unconditional check for whether there are DFS | |
3958 | * referrals for this path without prefix, to provide support | |
3959 | * for DFS referrals from w2k8 servers which don't seem to respond | |
3960 | * with PATH_NOT_COVERED to requests that include the prefix. | |
3961 | * Chase the referral if found, otherwise continue normally. | |
3962 | */ | |
3963 | if (referral_walks_count == 0) { | |
af4281dc PS |
3964 | int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, |
3965 | false); | |
c1508ca2 SF |
3966 | if (!refrc) { |
3967 | referral_walks_count++; | |
3968 | goto try_mount_again; | |
3969 | } | |
3970 | } | |
3971 | #endif | |
3972 | ||
f87d39d9 | 3973 | /* check if a whole path is not remote */ |
70945643 | 3974 | if (!rc && tcon) { |
68889f26 PS |
3975 | if (!server->ops->is_path_accessible) { |
3976 | rc = -ENOSYS; | |
3977 | goto mount_fail_check; | |
3978 | } | |
6d3ea7e4 SF |
3979 | /* |
3980 | * cifs_build_path_to_root works only when we have a valid tcon | |
3981 | */ | |
374402a2 SP |
3982 | full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon, |
3983 | tcon->Flags & SMB_SHARE_IS_IN_DFS); | |
e4cce94c IM |
3984 | if (full_path == NULL) { |
3985 | rc = -ENOMEM; | |
3986 | goto mount_fail_check; | |
3987 | } | |
68889f26 PS |
3988 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, |
3989 | full_path); | |
03ceace5 | 3990 | if (rc != 0 && rc != -EREMOTE) { |
e4cce94c IM |
3991 | kfree(full_path); |
3992 | goto mount_fail_check; | |
3993 | } | |
a6b5058f | 3994 | |
d171356f SP |
3995 | if (rc != -EREMOTE) { |
3996 | rc = cifs_are_all_path_components_accessible(server, | |
a6b5058f AA |
3997 | xid, tcon, cifs_sb, |
3998 | full_path); | |
d171356f SP |
3999 | if (rc != 0) { |
4000 | cifs_dbg(VFS, "cannot query dirs between root and final path, " | |
4001 | "enabling CIFS_MOUNT_USE_PREFIX_PATH\n"); | |
4002 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH; | |
4003 | rc = 0; | |
4004 | } | |
a6b5058f | 4005 | } |
e4cce94c IM |
4006 | kfree(full_path); |
4007 | } | |
4008 | ||
1bfe73c2 IM |
4009 | /* get referral if needed */ |
4010 | if (rc == -EREMOTE) { | |
d036f50f | 4011 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
4012 | if (referral_walks_count > MAX_NESTED_LINKS) { |
4013 | /* | |
4014 | * BB: when we implement proper loop detection, | |
4015 | * we will remove this check. But now we need it | |
4016 | * to prevent an indefinite loop if 'DFS tree' is | |
4017 | * misconfigured (i.e. has loops). | |
4018 | */ | |
4019 | rc = -ELOOP; | |
4020 | goto mount_fail_check; | |
4021 | } | |
1bfe73c2 | 4022 | |
af4281dc | 4023 | rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true); |
7b91e266 | 4024 | |
dd613945 | 4025 | if (!rc) { |
5c2503a8 | 4026 | referral_walks_count++; |
1bfe73c2 IM |
4027 | goto try_mount_again; |
4028 | } | |
dd613945 | 4029 | goto mount_fail_check; |
d036f50f SF |
4030 | #else /* No DFS support, return error on mount */ |
4031 | rc = -EOPNOTSUPP; | |
4032 | #endif | |
1bfe73c2 IM |
4033 | } |
4034 | ||
9d002df4 JL |
4035 | if (rc) |
4036 | goto mount_fail_check; | |
4037 | ||
4038 | /* now, hang the tcon off of the superblock */ | |
4039 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); | |
4040 | if (tlink == NULL) { | |
4041 | rc = -ENOMEM; | |
4042 | goto mount_fail_check; | |
4043 | } | |
4044 | ||
af4281dc | 4045 | tlink->tl_uid = ses->linux_uid; |
9d002df4 JL |
4046 | tlink->tl_tcon = tcon; |
4047 | tlink->tl_time = jiffies; | |
4048 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
4049 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4050 | ||
b647c35f | 4051 | cifs_sb->master_tlink = tlink; |
9d002df4 | 4052 | spin_lock(&cifs_sb->tlink_tree_lock); |
b647c35f | 4053 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
9d002df4 | 4054 | spin_unlock(&cifs_sb->tlink_tree_lock); |
413e661c | 4055 | |
da472fc8 | 4056 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
4057 | TLINK_IDLE_EXPIRE); |
4058 | ||
1bfe73c2 IM |
4059 | mount_fail_check: |
4060 | /* on error free sesinfo and tcon struct if needed */ | |
4061 | if (rc) { | |
1bfe73c2 | 4062 | /* If find_unc succeeded then rc == 0 so we can not end */ |
25985edc | 4063 | /* up accidentally freeing someone elses tcon struct */ |
1bfe73c2 IM |
4064 | if (tcon) |
4065 | cifs_put_tcon(tcon); | |
af4281dc PS |
4066 | else if (ses) |
4067 | cifs_put_smb_ses(ses); | |
1bfe73c2 | 4068 | else |
53e0e11e | 4069 | cifs_put_tcp_session(server, 0); |
1bfe73c2 IM |
4070 | } |
4071 | ||
70fe7dc0 | 4072 | out: |
6d5786a3 | 4073 | free_xid(xid); |
1da177e4 LT |
4074 | return rc; |
4075 | } | |
4076 | ||
8d1bca32 | 4077 | /* |
b327a717 | 4078 | * Issue a TREE_CONNECT request. |
8d1bca32 | 4079 | */ |
1da177e4 | 4080 | int |
2e6e02ab | 4081 | CIFSTCon(const unsigned int xid, struct cifs_ses *ses, |
96daf2b0 | 4082 | const char *tree, struct cifs_tcon *tcon, |
1da177e4 LT |
4083 | const struct nls_table *nls_codepage) |
4084 | { | |
4085 | struct smb_hdr *smb_buffer; | |
4086 | struct smb_hdr *smb_buffer_response; | |
4087 | TCONX_REQ *pSMB; | |
4088 | TCONX_RSP *pSMBr; | |
4089 | unsigned char *bcc_ptr; | |
4090 | int rc = 0; | |
690c522f JL |
4091 | int length; |
4092 | __u16 bytes_left, count; | |
1da177e4 LT |
4093 | |
4094 | if (ses == NULL) | |
4095 | return -EIO; | |
4096 | ||
4097 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 4098 | if (smb_buffer == NULL) |
1da177e4 | 4099 | return -ENOMEM; |
ca43e3be | 4100 | |
1da177e4 LT |
4101 | smb_buffer_response = smb_buffer; |
4102 | ||
4103 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
4104 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 | 4105 | |
88257360 | 4106 | smb_buffer->Mid = get_next_mid(ses->server); |
1da177e4 LT |
4107 | smb_buffer->Uid = ses->Suid; |
4108 | pSMB = (TCONX_REQ *) smb_buffer; | |
4109 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
4110 | ||
4111 | pSMB->AndXCommand = 0xFF; | |
4112 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 4113 | bcc_ptr = &pSMB->Password[0]; |
b327a717 | 4114 | if (tcon->pipe || (ses->server->sec_mode & SECMODE_USER)) { |
eeac8047 | 4115 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 4116 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 4117 | bcc_ptr++; /* skip password */ |
7c7b25bc | 4118 | /* already aligned so no need to do it below */ |
eeac8047 | 4119 | } else { |
540b2e37 | 4120 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
4121 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
4122 | specified as required (when that support is added to | |
4123 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 4124 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
4125 | by Samba (not sure whether other servers allow |
4126 | NTLMv2 password here) */ | |
7c7b25bc | 4127 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 4128 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
3f618223 | 4129 | (ses->sectype == LANMAN)) |
d3ba50b1 | 4130 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
96daf2b0 | 4131 | ses->server->sec_mode & |
4e53a3fb JL |
4132 | SECMODE_PW_ENCRYPT ? true : false, |
4133 | bcc_ptr); | |
7c7b25bc SF |
4134 | else |
4135 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 | 4136 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
9ef5992e | 4137 | bcc_ptr, nls_codepage); |
f3a31a2b SF |
4138 | if (rc) { |
4139 | cifs_dbg(FYI, "%s Can't generate NTLM rsp. Error: %d\n", | |
4140 | __func__, rc); | |
4141 | cifs_buf_release(smb_buffer); | |
4142 | return rc; | |
4143 | } | |
eeac8047 | 4144 | |
540b2e37 | 4145 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 4146 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
4147 | /* must align unicode strings */ |
4148 | *bcc_ptr = 0; /* null byte password */ | |
4149 | bcc_ptr++; | |
4150 | } | |
eeac8047 | 4151 | } |
1da177e4 | 4152 | |
38d77c50 | 4153 | if (ses->server->sign) |
1da177e4 LT |
4154 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
4155 | ||
4156 | if (ses->capabilities & CAP_STATUS32) { | |
4157 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
4158 | } | |
4159 | if (ses->capabilities & CAP_DFS) { | |
4160 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
4161 | } | |
4162 | if (ses->capabilities & CAP_UNICODE) { | |
4163 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
4164 | length = | |
acbbb76a | 4165 | cifs_strtoUTF16((__le16 *) bcc_ptr, tree, |
50c2f753 | 4166 | 6 /* max utf8 char length in bytes */ * |
a878fb22 SF |
4167 | (/* server len*/ + 256 /* share len */), nls_codepage); |
4168 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
4169 | bcc_ptr += 2; /* skip trailing null */ |
4170 | } else { /* ASCII */ | |
1da177e4 LT |
4171 | strcpy(bcc_ptr, tree); |
4172 | bcc_ptr += strlen(tree) + 1; | |
4173 | } | |
4174 | strcpy(bcc_ptr, "?????"); | |
4175 | bcc_ptr += strlen("?????"); | |
4176 | bcc_ptr += 1; | |
4177 | count = bcc_ptr - &pSMB->Password[0]; | |
be8e3b00 SF |
4178 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
4179 | pSMB->hdr.smb_buf_length) + count); | |
1da177e4 LT |
4180 | pSMB->ByteCount = cpu_to_le16(count); |
4181 | ||
133672ef | 4182 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 4183 | 0); |
1da177e4 | 4184 | |
1da177e4 | 4185 | /* above now done in SendReceive */ |
b327a717 | 4186 | if (rc == 0) { |
0e0d2cf3 SF |
4187 | bool is_unicode; |
4188 | ||
1da177e4 | 4189 | tcon->tidStatus = CifsGood; |
3b795210 | 4190 | tcon->need_reconnect = false; |
1da177e4 LT |
4191 | tcon->tid = smb_buffer_response->Tid; |
4192 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 4193 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 4194 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
4195 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
4196 | is_unicode = true; | |
4197 | else | |
4198 | is_unicode = false; | |
4199 | ||
cc20c031 | 4200 | |
50c2f753 | 4201 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
4202 | if (length == 3) { |
4203 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
4204 | (bcc_ptr[2] == 'C')) { | |
f96637be | 4205 | cifs_dbg(FYI, "IPC connection\n"); |
b327a717 AA |
4206 | tcon->ipc = true; |
4207 | tcon->pipe = true; | |
7f8ed420 SF |
4208 | } |
4209 | } else if (length == 2) { | |
4210 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
4211 | /* the most common case */ | |
f96637be | 4212 | cifs_dbg(FYI, "disk share connection\n"); |
7f8ed420 SF |
4213 | } |
4214 | } | |
50c2f753 | 4215 | bcc_ptr += length + 1; |
cc20c031 | 4216 | bytes_left -= (length + 1); |
46b51d08 | 4217 | strlcpy(tcon->treeName, tree, sizeof(tcon->treeName)); |
cc20c031 JL |
4218 | |
4219 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 4220 | kfree(tcon->nativeFileSystem); |
acbbb76a | 4221 | tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr, |
0e0d2cf3 | 4222 | bytes_left, is_unicode, |
cc20c031 JL |
4223 | nls_codepage); |
4224 | ||
f96637be | 4225 | cifs_dbg(FYI, "nativeFileSystem=%s\n", tcon->nativeFileSystem); |
cc20c031 | 4226 | |
fb8c4b14 | 4227 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
4228 | (smb_buffer_response->WordCount == 7)) |
4229 | /* field is in same location */ | |
3979877e SF |
4230 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
4231 | else | |
4232 | tcon->Flags = 0; | |
f96637be | 4233 | cifs_dbg(FYI, "Tcon flags: 0x%x\n", tcon->Flags); |
1da177e4 LT |
4234 | } |
4235 | ||
a8a11d39 | 4236 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
4237 | return rc; |
4238 | } | |
4239 | ||
2e32cf5e AV |
4240 | static void delayed_free(struct rcu_head *p) |
4241 | { | |
4242 | struct cifs_sb_info *sbi = container_of(p, struct cifs_sb_info, rcu); | |
4243 | unload_nls(sbi->local_nls); | |
4244 | kfree(sbi); | |
4245 | } | |
4246 | ||
2a9b9951 AV |
4247 | void |
4248 | cifs_umount(struct cifs_sb_info *cifs_sb) | |
1da177e4 | 4249 | { |
b647c35f JL |
4250 | struct rb_root *root = &cifs_sb->tlink_tree; |
4251 | struct rb_node *node; | |
4252 | struct tcon_link *tlink; | |
9d002df4 | 4253 | |
2de970ff JL |
4254 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
4255 | ||
b647c35f JL |
4256 | spin_lock(&cifs_sb->tlink_tree_lock); |
4257 | while ((node = rb_first(root))) { | |
4258 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
4259 | cifs_get_tlink(tlink); | |
4260 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4261 | rb_erase(node, root); | |
1da177e4 | 4262 | |
b647c35f JL |
4263 | spin_unlock(&cifs_sb->tlink_tree_lock); |
4264 | cifs_put_tlink(tlink); | |
4265 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4266 | } | |
4267 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 4268 | |
d757d71b | 4269 | kfree(cifs_sb->mountdata); |
a6b5058f | 4270 | kfree(cifs_sb->prepath); |
2e32cf5e | 4271 | call_rcu(&cifs_sb->rcu, delayed_free); |
50c2f753 | 4272 | } |
1da177e4 | 4273 | |
286170aa PS |
4274 | int |
4275 | cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses) | |
1da177e4 LT |
4276 | { |
4277 | int rc = 0; | |
198b5682 | 4278 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 4279 | |
286170aa PS |
4280 | if (!server->ops->need_neg || !server->ops->negotiate) |
4281 | return -ENOSYS; | |
4282 | ||
198b5682 | 4283 | /* only send once per connect */ |
286170aa | 4284 | if (!server->ops->need_neg(server)) |
198b5682 JL |
4285 | return 0; |
4286 | ||
45275789 | 4287 | set_credits(server, 1); |
286170aa PS |
4288 | |
4289 | rc = server->ops->negotiate(xid, ses); | |
198b5682 JL |
4290 | if (rc == 0) { |
4291 | spin_lock(&GlobalMid_Lock); | |
7fdbaa1b | 4292 | if (server->tcpStatus == CifsNeedNegotiate) |
198b5682 JL |
4293 | server->tcpStatus = CifsGood; |
4294 | else | |
4295 | rc = -EHOSTDOWN; | |
4296 | spin_unlock(&GlobalMid_Lock); | |
198b5682 JL |
4297 | } |
4298 | ||
4299 | return rc; | |
4300 | } | |
4301 | ||
58c45c58 PS |
4302 | int |
4303 | cifs_setup_session(const unsigned int xid, struct cifs_ses *ses, | |
4304 | struct nls_table *nls_info) | |
198b5682 | 4305 | { |
58c45c58 | 4306 | int rc = -ENOSYS; |
198b5682 | 4307 | struct TCP_Server_Info *server = ses->server; |
26b994fa | 4308 | |
198b5682 | 4309 | ses->capabilities = server->capabilities; |
26b994fa | 4310 | if (linuxExtEnabled == 0) |
29e20f9c | 4311 | ses->capabilities &= (~server->vals->cap_unix); |
20418acd | 4312 | |
f96637be | 4313 | cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n", |
96daf2b0 | 4314 | server->sec_mode, server->capabilities, server->timeAdj); |
cb7691b6 | 4315 | |
f5c4ba81 | 4316 | if (ses->auth_key.response) { |
2a18287b | 4317 | cifs_dbg(FYI, "Free previous auth_key.response = %p\n", |
f5c4ba81 SW |
4318 | ses->auth_key.response); |
4319 | kfree(ses->auth_key.response); | |
4320 | ses->auth_key.response = NULL; | |
4321 | ses->auth_key.len = 0; | |
4322 | } | |
4323 | ||
58c45c58 PS |
4324 | if (server->ops->sess_setup) |
4325 | rc = server->ops->sess_setup(xid, ses, nls_info); | |
4326 | ||
d4e63bd6 | 4327 | if (rc) |
f96637be | 4328 | cifs_dbg(VFS, "Send error in SessSetup = %d\n", rc); |
21e73393 | 4329 | |
1da177e4 LT |
4330 | return rc; |
4331 | } | |
4332 | ||
8a8798a5 JL |
4333 | static int |
4334 | cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses) | |
4335 | { | |
3f618223 JL |
4336 | vol->sectype = ses->sectype; |
4337 | ||
4338 | /* krb5 is special, since we don't need username or pw */ | |
4339 | if (vol->sectype == Kerberos) | |
8a8798a5 | 4340 | return 0; |
8a8798a5 JL |
4341 | |
4342 | return cifs_set_cifscreds(vol, ses); | |
4343 | } | |
4344 | ||
96daf2b0 | 4345 | static struct cifs_tcon * |
6d4a0832 | 4346 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid) |
9d002df4 | 4347 | { |
8a8798a5 | 4348 | int rc; |
96daf2b0 SF |
4349 | struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); |
4350 | struct cifs_ses *ses; | |
4351 | struct cifs_tcon *tcon = NULL; | |
9d002df4 | 4352 | struct smb_vol *vol_info; |
9d002df4 JL |
4353 | |
4354 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
803ab977 DC |
4355 | if (vol_info == NULL) |
4356 | return ERR_PTR(-ENOMEM); | |
9d002df4 | 4357 | |
9d002df4 JL |
4358 | vol_info->local_nls = cifs_sb->local_nls; |
4359 | vol_info->linux_uid = fsuid; | |
4360 | vol_info->cred_uid = fsuid; | |
4361 | vol_info->UNC = master_tcon->treeName; | |
4362 | vol_info->retry = master_tcon->retry; | |
4363 | vol_info->nocase = master_tcon->nocase; | |
4364 | vol_info->local_lease = master_tcon->local_lease; | |
4365 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
28e11bd8 JL |
4366 | vol_info->sectype = master_tcon->ses->sectype; |
4367 | vol_info->sign = master_tcon->ses->sign; | |
9d002df4 | 4368 | |
8a8798a5 JL |
4369 | rc = cifs_set_vol_auth(vol_info, master_tcon->ses); |
4370 | if (rc) { | |
4371 | tcon = ERR_PTR(rc); | |
4372 | goto out; | |
4373 | } | |
9d002df4 JL |
4374 | |
4375 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 4376 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 4377 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 4378 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
4379 | |
4380 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
4381 | if (IS_ERR(ses)) { | |
96daf2b0 | 4382 | tcon = (struct cifs_tcon *)ses; |
53e0e11e | 4383 | cifs_put_tcp_session(master_tcon->ses->server, 0); |
9d002df4 JL |
4384 | goto out; |
4385 | } | |
4386 | ||
4387 | tcon = cifs_get_tcon(ses, vol_info); | |
4388 | if (IS_ERR(tcon)) { | |
4389 | cifs_put_smb_ses(ses); | |
4390 | goto out; | |
4391 | } | |
4392 | ||
29e20f9c | 4393 | if (cap_unix(ses)) |
9d002df4 JL |
4394 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); |
4395 | out: | |
8a8798a5 | 4396 | kfree(vol_info->username); |
97f4b727 | 4397 | kzfree(vol_info->password); |
9d002df4 JL |
4398 | kfree(vol_info); |
4399 | ||
4400 | return tcon; | |
4401 | } | |
4402 | ||
96daf2b0 | 4403 | struct cifs_tcon * |
9d002df4 JL |
4404 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) |
4405 | { | |
4406 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
4407 | } | |
4408 | ||
b647c35f JL |
4409 | /* find and return a tlink with given uid */ |
4410 | static struct tcon_link * | |
6d4a0832 | 4411 | tlink_rb_search(struct rb_root *root, kuid_t uid) |
b647c35f JL |
4412 | { |
4413 | struct rb_node *node = root->rb_node; | |
4414 | struct tcon_link *tlink; | |
4415 | ||
4416 | while (node) { | |
4417 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
4418 | ||
6d4a0832 | 4419 | if (uid_gt(tlink->tl_uid, uid)) |
b647c35f | 4420 | node = node->rb_left; |
6d4a0832 | 4421 | else if (uid_lt(tlink->tl_uid, uid)) |
b647c35f JL |
4422 | node = node->rb_right; |
4423 | else | |
4424 | return tlink; | |
4425 | } | |
4426 | return NULL; | |
4427 | } | |
4428 | ||
4429 | /* insert a tcon_link into the tree */ | |
4430 | static void | |
4431 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
4432 | { | |
4433 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
4434 | struct tcon_link *tlink; | |
4435 | ||
4436 | while (*new) { | |
4437 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
4438 | parent = *new; | |
4439 | ||
6d4a0832 | 4440 | if (uid_gt(tlink->tl_uid, new_tlink->tl_uid)) |
b647c35f JL |
4441 | new = &((*new)->rb_left); |
4442 | else | |
4443 | new = &((*new)->rb_right); | |
4444 | } | |
4445 | ||
4446 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
4447 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
4448 | } | |
4449 | ||
9d002df4 JL |
4450 | /* |
4451 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
4452 | * current task. | |
4453 | * | |
4454 | * If the superblock doesn't refer to a multiuser mount, then just return | |
4455 | * the master tcon for the mount. | |
4456 | * | |
6ef933a3 | 4457 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
4458 | * exists, then check to see if it's pending construction. If it is then wait |
4459 | * for construction to complete. Once it's no longer pending, check to see if | |
4460 | * it failed and either return an error or retry construction, depending on | |
4461 | * the timeout. | |
4462 | * | |
4463 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
4464 | * try to construct a new one. | |
4465 | */ | |
4466 | struct tcon_link * | |
4467 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
4468 | { | |
4469 | int ret; | |
6d4a0832 | 4470 | kuid_t fsuid = current_fsuid(); |
9d002df4 JL |
4471 | struct tcon_link *tlink, *newtlink; |
4472 | ||
4473 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
4474 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
4475 | ||
4476 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 4477 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4478 | if (tlink) |
4479 | cifs_get_tlink(tlink); | |
4480 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4481 | ||
4482 | if (tlink == NULL) { | |
4483 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
4484 | if (newtlink == NULL) | |
4485 | return ERR_PTR(-ENOMEM); | |
b647c35f | 4486 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
4487 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
4488 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
4489 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
4490 | cifs_get_tlink(newtlink); | |
4491 | ||
9d002df4 JL |
4492 | spin_lock(&cifs_sb->tlink_tree_lock); |
4493 | /* was one inserted after previous search? */ | |
b647c35f | 4494 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
4495 | if (tlink) { |
4496 | cifs_get_tlink(tlink); | |
4497 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4498 | kfree(newtlink); |
4499 | goto wait_for_construction; | |
4500 | } | |
9d002df4 | 4501 | tlink = newtlink; |
b647c35f JL |
4502 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
4503 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
4504 | } else { |
4505 | wait_for_construction: | |
4506 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
9d002df4 JL |
4507 | TASK_INTERRUPTIBLE); |
4508 | if (ret) { | |
4509 | cifs_put_tlink(tlink); | |
74316201 | 4510 | return ERR_PTR(-ERESTARTSYS); |
9d002df4 JL |
4511 | } |
4512 | ||
4513 | /* if it's good, return it */ | |
4514 | if (!IS_ERR(tlink->tl_tcon)) | |
4515 | return tlink; | |
4516 | ||
4517 | /* return error if we tried this already recently */ | |
4518 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
4519 | cifs_put_tlink(tlink); | |
4520 | return ERR_PTR(-EACCES); | |
4521 | } | |
4522 | ||
4523 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
4524 | goto wait_for_construction; | |
4525 | } | |
4526 | ||
4527 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
4528 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
4529 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
4530 | ||
4531 | if (IS_ERR(tlink->tl_tcon)) { | |
4532 | cifs_put_tlink(tlink); | |
4533 | return ERR_PTR(-EACCES); | |
4534 | } | |
4535 | ||
4536 | return tlink; | |
4537 | } | |
2de970ff JL |
4538 | |
4539 | /* | |
4540 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
4541 | * out tcons. | |
4542 | */ | |
4543 | static void | |
4544 | cifs_prune_tlinks(struct work_struct *work) | |
4545 | { | |
4546 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
4547 | prune_tlinks.work); | |
b647c35f | 4548 | struct rb_root *root = &cifs_sb->tlink_tree; |
37e12f55 | 4549 | struct rb_node *node; |
b647c35f JL |
4550 | struct rb_node *tmp; |
4551 | struct tcon_link *tlink; | |
2de970ff | 4552 | |
b647c35f JL |
4553 | /* |
4554 | * Because we drop the spinlock in the loop in order to put the tlink | |
4555 | * it's not guarded against removal of links from the tree. The only | |
4556 | * places that remove entries from the tree are this function and | |
4557 | * umounts. Because this function is non-reentrant and is canceled | |
4558 | * before umount can proceed, this is safe. | |
4559 | */ | |
4560 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4561 | node = rb_first(root); | |
4562 | while (node != NULL) { | |
4563 | tmp = node; | |
4564 | node = rb_next(tmp); | |
4565 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
4566 | ||
4567 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
4568 | atomic_read(&tlink->tl_count) != 0 || | |
4569 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
4570 | continue; | |
2de970ff | 4571 | |
b647c35f JL |
4572 | cifs_get_tlink(tlink); |
4573 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4574 | rb_erase(tmp, root); | |
4575 | ||
4576 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4577 | cifs_put_tlink(tlink); | |
4578 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4579 | } | |
4580 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff | 4581 | |
da472fc8 | 4582 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
4583 | TLINK_IDLE_EXPIRE); |
4584 | } |