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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" |
1c780228 | 59 | #include "dns_resolve.h" |
93d5cb51 | 60 | #include "cifsfs.h" |
1c780228 PA |
61 | #ifdef CONFIG_CIFS_DFS_UPCALL |
62 | #include "dfs_cache.h" | |
63 | #endif | |
1da177e4 | 64 | |
1da177e4 | 65 | extern mempool_t *cifs_req_poolp; |
f92a720e | 66 | extern bool disable_legacy_dialects; |
1da177e4 | 67 | |
2de970ff | 68 | /* FIXME: should these be tunable? */ |
9d002df4 | 69 | #define TLINK_ERROR_EXPIRE (1 * HZ) |
2de970ff | 70 | #define TLINK_IDLE_EXPIRE (600 * HZ) |
9d002df4 | 71 | |
8830d7e0 | 72 | enum { |
8830d7e0 SP |
73 | /* Mount options that take no arguments */ |
74 | Opt_user_xattr, Opt_nouser_xattr, | |
75 | Opt_forceuid, Opt_noforceuid, | |
72bd481f | 76 | Opt_forcegid, Opt_noforcegid, |
8830d7e0 SP |
77 | Opt_noblocksend, Opt_noautotune, |
78 | Opt_hard, Opt_soft, Opt_perm, Opt_noperm, | |
2baa2682 | 79 | Opt_mapposix, Opt_nomapposix, |
8830d7e0 SP |
80 | Opt_mapchars, Opt_nomapchars, Opt_sfu, |
81 | Opt_nosfu, Opt_nodfs, Opt_posixpaths, | |
b326614e | 82 | Opt_noposixpaths, Opt_nounix, Opt_unix, |
8830d7e0 SP |
83 | Opt_nocase, |
84 | Opt_brl, Opt_nobrl, | |
3d4ef9a1 | 85 | Opt_handlecache, Opt_nohandlecache, |
95932655 | 86 | Opt_forcemandatorylock, Opt_setuidfromacl, Opt_setuids, |
8830d7e0 SP |
87 | Opt_nosetuids, Opt_dynperm, Opt_nodynperm, |
88 | Opt_nohard, Opt_nosoft, | |
89 | Opt_nointr, Opt_intr, | |
90 | Opt_nostrictsync, Opt_strictsync, | |
91 | Opt_serverino, Opt_noserverino, | |
92 | Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl, | |
93 | Opt_acl, Opt_noacl, Opt_locallease, | |
1b359204 | 94 | Opt_sign, Opt_seal, Opt_noac, |
8830d7e0 | 95 | Opt_fsc, Opt_mfsymlinks, |
a0b3df5c | 96 | Opt_multiuser, Opt_sloppy, Opt_nosharesock, |
b2a30774 | 97 | Opt_persistent, Opt_nopersistent, |
592fafe6 | 98 | Opt_resilient, Opt_noresilient, |
8339dd32 | 99 | Opt_domainauto, Opt_rdma, |
8830d7e0 SP |
100 | |
101 | /* Mount options which take numeric value */ | |
102 | Opt_backupuid, Opt_backupgid, Opt_uid, | |
103 | Opt_cruid, Opt_gid, Opt_file_mode, | |
104 | Opt_dirmode, Opt_port, | |
e8506d25 | 105 | Opt_blocksize, Opt_rsize, Opt_wsize, Opt_actimeo, |
ca567eb2 | 106 | Opt_echo_interval, Opt_max_credits, Opt_handletimeout, |
8b217fe7 | 107 | Opt_snapshot, |
8830d7e0 SP |
108 | |
109 | /* Mount options which take string value */ | |
110 | Opt_user, Opt_pass, Opt_ip, | |
73a999fa | 111 | Opt_domain, Opt_srcaddr, Opt_iocharset, |
8830d7e0 | 112 | Opt_netbiosname, Opt_servern, |
23db65f5 | 113 | Opt_ver, Opt_vers, Opt_sec, Opt_cache, |
8830d7e0 SP |
114 | |
115 | /* Mount options to be ignored */ | |
116 | Opt_ignore, | |
117 | ||
118 | /* Options which could be blank */ | |
119 | Opt_blank_pass, | |
4fe9e963 SP |
120 | Opt_blank_user, |
121 | Opt_blank_ip, | |
8830d7e0 SP |
122 | |
123 | Opt_err | |
124 | }; | |
125 | ||
126 | static const match_table_t cifs_mount_option_tokens = { | |
127 | ||
128 | { Opt_user_xattr, "user_xattr" }, | |
129 | { Opt_nouser_xattr, "nouser_xattr" }, | |
130 | { Opt_forceuid, "forceuid" }, | |
131 | { Opt_noforceuid, "noforceuid" }, | |
72bd481f JL |
132 | { Opt_forcegid, "forcegid" }, |
133 | { Opt_noforcegid, "noforcegid" }, | |
8830d7e0 SP |
134 | { Opt_noblocksend, "noblocksend" }, |
135 | { Opt_noautotune, "noautotune" }, | |
136 | { Opt_hard, "hard" }, | |
137 | { Opt_soft, "soft" }, | |
138 | { Opt_perm, "perm" }, | |
139 | { Opt_noperm, "noperm" }, | |
2baa2682 | 140 | { Opt_mapchars, "mapchars" }, /* SFU style */ |
8830d7e0 | 141 | { Opt_nomapchars, "nomapchars" }, |
2baa2682 SF |
142 | { Opt_mapposix, "mapposix" }, /* SFM style */ |
143 | { Opt_nomapposix, "nomapposix" }, | |
8830d7e0 SP |
144 | { Opt_sfu, "sfu" }, |
145 | { Opt_nosfu, "nosfu" }, | |
146 | { Opt_nodfs, "nodfs" }, | |
147 | { Opt_posixpaths, "posixpaths" }, | |
148 | { Opt_noposixpaths, "noposixpaths" }, | |
149 | { Opt_nounix, "nounix" }, | |
150 | { Opt_nounix, "nolinux" }, | |
b326614e SF |
151 | { Opt_nounix, "noposix" }, |
152 | { Opt_unix, "unix" }, | |
153 | { Opt_unix, "linux" }, | |
154 | { Opt_unix, "posix" }, | |
8830d7e0 SP |
155 | { Opt_nocase, "nocase" }, |
156 | { Opt_nocase, "ignorecase" }, | |
157 | { Opt_brl, "brl" }, | |
158 | { Opt_nobrl, "nobrl" }, | |
3d4ef9a1 SF |
159 | { Opt_handlecache, "handlecache" }, |
160 | { Opt_nohandlecache, "nohandlecache" }, | |
8830d7e0 SP |
161 | { Opt_nobrl, "nolock" }, |
162 | { Opt_forcemandatorylock, "forcemandatorylock" }, | |
5cfdddcf | 163 | { Opt_forcemandatorylock, "forcemand" }, |
8830d7e0 SP |
164 | { Opt_setuids, "setuids" }, |
165 | { Opt_nosetuids, "nosetuids" }, | |
95932655 | 166 | { Opt_setuidfromacl, "idsfromsid" }, |
8830d7e0 SP |
167 | { Opt_dynperm, "dynperm" }, |
168 | { Opt_nodynperm, "nodynperm" }, | |
169 | { Opt_nohard, "nohard" }, | |
170 | { Opt_nosoft, "nosoft" }, | |
171 | { Opt_nointr, "nointr" }, | |
172 | { Opt_intr, "intr" }, | |
173 | { Opt_nostrictsync, "nostrictsync" }, | |
174 | { Opt_strictsync, "strictsync" }, | |
175 | { Opt_serverino, "serverino" }, | |
176 | { Opt_noserverino, "noserverino" }, | |
177 | { Opt_rwpidforward, "rwpidforward" }, | |
178 | { Opt_cifsacl, "cifsacl" }, | |
179 | { Opt_nocifsacl, "nocifsacl" }, | |
180 | { Opt_acl, "acl" }, | |
181 | { Opt_noacl, "noacl" }, | |
182 | { Opt_locallease, "locallease" }, | |
183 | { Opt_sign, "sign" }, | |
184 | { Opt_seal, "seal" }, | |
8830d7e0 SP |
185 | { Opt_noac, "noac" }, |
186 | { Opt_fsc, "fsc" }, | |
187 | { Opt_mfsymlinks, "mfsymlinks" }, | |
188 | { Opt_multiuser, "multiuser" }, | |
d8162558 | 189 | { Opt_sloppy, "sloppy" }, |
a0b3df5c | 190 | { Opt_nosharesock, "nosharesock" }, |
b2a30774 SF |
191 | { Opt_persistent, "persistenthandles"}, |
192 | { Opt_nopersistent, "nopersistenthandles"}, | |
592fafe6 SF |
193 | { Opt_resilient, "resilienthandles"}, |
194 | { Opt_noresilient, "noresilienthandles"}, | |
39566443 | 195 | { Opt_domainauto, "domainauto"}, |
8339dd32 | 196 | { Opt_rdma, "rdma"}, |
8830d7e0 SP |
197 | |
198 | { Opt_backupuid, "backupuid=%s" }, | |
199 | { Opt_backupgid, "backupgid=%s" }, | |
200 | { Opt_uid, "uid=%s" }, | |
201 | { Opt_cruid, "cruid=%s" }, | |
202 | { Opt_gid, "gid=%s" }, | |
203 | { Opt_file_mode, "file_mode=%s" }, | |
204 | { Opt_dirmode, "dirmode=%s" }, | |
205 | { Opt_dirmode, "dir_mode=%s" }, | |
206 | { Opt_port, "port=%s" }, | |
e8506d25 | 207 | { Opt_blocksize, "bsize=%s" }, |
8830d7e0 SP |
208 | { Opt_rsize, "rsize=%s" }, |
209 | { Opt_wsize, "wsize=%s" }, | |
210 | { Opt_actimeo, "actimeo=%s" }, | |
ca567eb2 | 211 | { Opt_handletimeout, "handletimeout=%s" }, |
adfeb3e0 | 212 | { Opt_echo_interval, "echo_interval=%s" }, |
141891f4 | 213 | { Opt_max_credits, "max_credits=%s" }, |
8b217fe7 | 214 | { Opt_snapshot, "snapshot=%s" }, |
8830d7e0 | 215 | |
4fe9e963 SP |
216 | { Opt_blank_user, "user=" }, |
217 | { Opt_blank_user, "username=" }, | |
8830d7e0 SP |
218 | { Opt_user, "user=%s" }, |
219 | { Opt_user, "username=%s" }, | |
220 | { Opt_blank_pass, "pass=" }, | |
3c15b4cf | 221 | { Opt_blank_pass, "password=" }, |
8830d7e0 SP |
222 | { Opt_pass, "pass=%s" }, |
223 | { Opt_pass, "password=%s" }, | |
4fe9e963 SP |
224 | { Opt_blank_ip, "ip=" }, |
225 | { Opt_blank_ip, "addr=" }, | |
8830d7e0 SP |
226 | { Opt_ip, "ip=%s" }, |
227 | { Opt_ip, "addr=%s" }, | |
73a999fa JL |
228 | { Opt_ignore, "unc=%s" }, |
229 | { Opt_ignore, "target=%s" }, | |
230 | { Opt_ignore, "path=%s" }, | |
8830d7e0 SP |
231 | { Opt_domain, "dom=%s" }, |
232 | { Opt_domain, "domain=%s" }, | |
233 | { Opt_domain, "workgroup=%s" }, | |
234 | { Opt_srcaddr, "srcaddr=%s" }, | |
73a999fa | 235 | { Opt_ignore, "prefixpath=%s" }, |
8830d7e0 | 236 | { Opt_iocharset, "iocharset=%s" }, |
8830d7e0 SP |
237 | { Opt_netbiosname, "netbiosname=%s" }, |
238 | { Opt_servern, "servern=%s" }, | |
239 | { Opt_ver, "ver=%s" }, | |
23db65f5 | 240 | { Opt_vers, "vers=%s" }, |
8830d7e0 | 241 | { Opt_sec, "sec=%s" }, |
15b6a473 | 242 | { Opt_cache, "cache=%s" }, |
8830d7e0 SP |
243 | |
244 | { Opt_ignore, "cred" }, | |
245 | { Opt_ignore, "credentials" }, | |
a557b976 JL |
246 | { Opt_ignore, "cred=%s" }, |
247 | { Opt_ignore, "credentials=%s" }, | |
8830d7e0 SP |
248 | { Opt_ignore, "guest" }, |
249 | { Opt_ignore, "rw" }, | |
250 | { Opt_ignore, "ro" }, | |
251 | { Opt_ignore, "suid" }, | |
252 | { Opt_ignore, "nosuid" }, | |
253 | { Opt_ignore, "exec" }, | |
254 | { Opt_ignore, "noexec" }, | |
255 | { Opt_ignore, "nodev" }, | |
256 | { Opt_ignore, "noauto" }, | |
257 | { Opt_ignore, "dev" }, | |
258 | { Opt_ignore, "mand" }, | |
259 | { Opt_ignore, "nomand" }, | |
9b9c5bea | 260 | { Opt_ignore, "relatime" }, |
8830d7e0 SP |
261 | { Opt_ignore, "_netdev" }, |
262 | ||
263 | { Opt_err, NULL } | |
264 | }; | |
265 | ||
266 | enum { | |
267 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
268 | Opt_sec_ntlmsspi, Opt_sec_ntlmssp, | |
7659624f JL |
269 | Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2, |
270 | Opt_sec_ntlmv2i, Opt_sec_lanman, | |
8830d7e0 SP |
271 | Opt_sec_none, |
272 | ||
273 | Opt_sec_err | |
274 | }; | |
275 | ||
276 | static const match_table_t cifs_secflavor_tokens = { | |
277 | { Opt_sec_krb5, "krb5" }, | |
278 | { Opt_sec_krb5i, "krb5i" }, | |
279 | { Opt_sec_krb5p, "krb5p" }, | |
280 | { Opt_sec_ntlmsspi, "ntlmsspi" }, | |
281 | { Opt_sec_ntlmssp, "ntlmssp" }, | |
282 | { Opt_ntlm, "ntlm" }, | |
283 | { Opt_sec_ntlmi, "ntlmi" }, | |
7659624f JL |
284 | { Opt_sec_ntlmv2, "nontlm" }, |
285 | { Opt_sec_ntlmv2, "ntlmv2" }, | |
8830d7e0 | 286 | { Opt_sec_ntlmv2i, "ntlmv2i" }, |
8830d7e0 SP |
287 | { Opt_sec_lanman, "lanman" }, |
288 | { Opt_sec_none, "none" }, | |
289 | ||
290 | { Opt_sec_err, NULL } | |
291 | }; | |
292 | ||
15b6a473 JL |
293 | /* cache flavors */ |
294 | enum { | |
295 | Opt_cache_loose, | |
296 | Opt_cache_strict, | |
297 | Opt_cache_none, | |
298 | Opt_cache_err | |
299 | }; | |
300 | ||
301 | static const match_table_t cifs_cacheflavor_tokens = { | |
302 | { Opt_cache_loose, "loose" }, | |
303 | { Opt_cache_strict, "strict" }, | |
304 | { Opt_cache_none, "none" }, | |
305 | { Opt_cache_err, NULL } | |
306 | }; | |
307 | ||
23db65f5 JL |
308 | static const match_table_t cifs_smb_version_tokens = { |
309 | { Smb_1, SMB1_VERSION_STRING }, | |
dd446b16 | 310 | { Smb_20, SMB20_VERSION_STRING}, |
1080ef75 | 311 | { Smb_21, SMB21_VERSION_STRING }, |
e4aa25e7 | 312 | { Smb_30, SMB30_VERSION_STRING }, |
20b6d8b4 | 313 | { Smb_302, SMB302_VERSION_STRING }, |
4a3b38ae | 314 | { Smb_302, ALT_SMB302_VERSION_STRING }, |
5f7fbf73 | 315 | { Smb_311, SMB311_VERSION_STRING }, |
aab1893d | 316 | { Smb_311, ALT_SMB311_VERSION_STRING }, |
9764c02f SF |
317 | { Smb_3any, SMB3ANY_VERSION_STRING }, |
318 | { Smb_default, SMBDEFAULT_VERSION_STRING }, | |
5f7fbf73 | 319 | { Smb_version_err, NULL } |
23db65f5 JL |
320 | }; |
321 | ||
a9f1b85e PS |
322 | static int ip_connect(struct TCP_Server_Info *server); |
323 | static int generic_ip_connect(struct TCP_Server_Info *server); | |
b647c35f | 324 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
2de970ff | 325 | static void cifs_prune_tlinks(struct work_struct *work); |
93d5cb51 PA |
326 | static char *extract_hostname(const char *unc); |
327 | ||
28eb24ff PA |
328 | /* |
329 | * Resolve hostname and set ip addr in tcp ses. Useful for hostnames that may | |
330 | * get their ip addresses changed at some point. | |
331 | * | |
332 | * This should be called with server->srv_mutex held. | |
333 | */ | |
334 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
335 | static int reconn_set_ipaddr(struct TCP_Server_Info *server) | |
336 | { | |
337 | int rc; | |
338 | int len; | |
339 | char *unc, *ipaddr = NULL; | |
340 | ||
341 | if (!server->hostname) | |
342 | return -EINVAL; | |
343 | ||
344 | len = strlen(server->hostname) + 3; | |
345 | ||
346 | unc = kmalloc(len, GFP_KERNEL); | |
347 | if (!unc) { | |
348 | cifs_dbg(FYI, "%s: failed to create UNC path\n", __func__); | |
349 | return -ENOMEM; | |
350 | } | |
74ea5f98 | 351 | scnprintf(unc, len, "\\\\%s", server->hostname); |
28eb24ff PA |
352 | |
353 | rc = dns_resolve_server_name_to_ip(unc, &ipaddr); | |
354 | kfree(unc); | |
355 | ||
356 | if (rc < 0) { | |
357 | cifs_dbg(FYI, "%s: failed to resolve server part of %s to IP: %d\n", | |
358 | __func__, server->hostname, rc); | |
359 | return rc; | |
360 | } | |
361 | ||
362 | rc = cifs_convert_address((struct sockaddr *)&server->dstaddr, ipaddr, | |
363 | strlen(ipaddr)); | |
364 | kfree(ipaddr); | |
365 | ||
366 | return !rc ? -1 : 0; | |
367 | } | |
368 | #else | |
369 | static inline int reconn_set_ipaddr(struct TCP_Server_Info *server) | |
370 | { | |
371 | return 0; | |
372 | } | |
373 | #endif | |
374 | ||
93d5cb51 PA |
375 | #ifdef CONFIG_CIFS_DFS_UPCALL |
376 | struct super_cb_data { | |
377 | struct TCP_Server_Info *server; | |
378 | struct cifs_sb_info *cifs_sb; | |
379 | }; | |
380 | ||
381 | /* These functions must be called with server->srv_mutex held */ | |
382 | ||
383 | static void super_cb(struct super_block *sb, void *arg) | |
384 | { | |
385 | struct super_cb_data *d = arg; | |
386 | struct cifs_sb_info *cifs_sb; | |
387 | struct cifs_tcon *tcon; | |
388 | ||
389 | if (d->cifs_sb) | |
390 | return; | |
391 | ||
392 | cifs_sb = CIFS_SB(sb); | |
393 | tcon = cifs_sb_master_tcon(cifs_sb); | |
394 | if (tcon->ses->server == d->server) | |
395 | d->cifs_sb = cifs_sb; | |
396 | } | |
397 | ||
398 | static inline struct cifs_sb_info * | |
399 | find_super_by_tcp(struct TCP_Server_Info *server) | |
400 | { | |
401 | struct super_cb_data d = { | |
402 | .server = server, | |
403 | .cifs_sb = NULL, | |
404 | }; | |
405 | ||
406 | iterate_supers_type(&cifs_fs_type, super_cb, &d); | |
407 | return d.cifs_sb ? d.cifs_sb : ERR_PTR(-ENOENT); | |
408 | } | |
409 | ||
410 | static void reconn_inval_dfs_target(struct TCP_Server_Info *server, | |
411 | struct cifs_sb_info *cifs_sb, | |
412 | struct dfs_cache_tgt_list *tgt_list, | |
413 | struct dfs_cache_tgt_iterator **tgt_it) | |
414 | { | |
415 | const char *name; | |
93d5cb51 PA |
416 | |
417 | if (!cifs_sb || !cifs_sb->origin_fullpath || !tgt_list || | |
418 | !server->nr_targets) | |
419 | return; | |
420 | ||
421 | if (!*tgt_it) { | |
422 | *tgt_it = dfs_cache_get_tgt_iterator(tgt_list); | |
423 | } else { | |
424 | *tgt_it = dfs_cache_get_next_tgt(tgt_list, *tgt_it); | |
425 | if (!*tgt_it) | |
426 | *tgt_it = dfs_cache_get_tgt_iterator(tgt_list); | |
427 | } | |
428 | ||
429 | cifs_dbg(FYI, "%s: UNC: %s\n", __func__, cifs_sb->origin_fullpath); | |
430 | ||
431 | name = dfs_cache_get_tgt_name(*tgt_it); | |
432 | ||
433 | kfree(server->hostname); | |
434 | ||
435 | server->hostname = extract_hostname(name); | |
8428817d DC |
436 | if (IS_ERR(server->hostname)) { |
437 | cifs_dbg(FYI, | |
438 | "%s: failed to extract hostname from target: %ld\n", | |
439 | __func__, PTR_ERR(server->hostname)); | |
93d5cb51 PA |
440 | } |
441 | } | |
442 | ||
443 | static inline int reconn_setup_dfs_targets(struct cifs_sb_info *cifs_sb, | |
444 | struct dfs_cache_tgt_list *tl, | |
445 | struct dfs_cache_tgt_iterator **it) | |
446 | { | |
447 | if (!cifs_sb->origin_fullpath) | |
448 | return -EOPNOTSUPP; | |
449 | return dfs_cache_noreq_find(cifs_sb->origin_fullpath + 1, NULL, tl); | |
450 | } | |
451 | #endif | |
1da177e4 | 452 | |
d5c5605c JL |
453 | /* |
454 | * cifs tcp session reconnection | |
455 | * | |
456 | * mark tcp session as reconnecting so temporarily locked | |
457 | * mark all smb sessions as reconnecting for tcp session | |
458 | * reconnect tcp session | |
459 | * wake up waiters on reconnection? - (not needed currently) | |
460 | */ | |
28ea5290 | 461 | int |
1da177e4 LT |
462 | cifs_reconnect(struct TCP_Server_Info *server) |
463 | { | |
464 | int rc = 0; | |
f1987b44 | 465 | struct list_head *tmp, *tmp2; |
96daf2b0 SF |
466 | struct cifs_ses *ses; |
467 | struct cifs_tcon *tcon; | |
fb8c4b14 | 468 | struct mid_q_entry *mid_entry; |
3c1105df | 469 | struct list_head retry_list; |
93d5cb51 | 470 | #ifdef CONFIG_CIFS_DFS_UPCALL |
23324407 PA |
471 | struct cifs_sb_info *cifs_sb = NULL; |
472 | struct dfs_cache_tgt_list tgt_list = {0}; | |
93d5cb51 PA |
473 | struct dfs_cache_tgt_iterator *tgt_it = NULL; |
474 | #endif | |
50c2f753 | 475 | |
1da177e4 | 476 | spin_lock(&GlobalMid_Lock); |
93d5cb51 PA |
477 | server->nr_targets = 1; |
478 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
61cabc7b | 479 | spin_unlock(&GlobalMid_Lock); |
93d5cb51 PA |
480 | cifs_sb = find_super_by_tcp(server); |
481 | if (IS_ERR(cifs_sb)) { | |
482 | rc = PTR_ERR(cifs_sb); | |
483 | cifs_dbg(FYI, "%s: will not do DFS failover: rc = %d\n", | |
484 | __func__, rc); | |
485 | cifs_sb = NULL; | |
486 | } else { | |
487 | rc = reconn_setup_dfs_targets(cifs_sb, &tgt_list, &tgt_it); | |
55a7f006 | 488 | if (rc && (rc != -EOPNOTSUPP)) { |
93d5cb51 PA |
489 | cifs_dbg(VFS, "%s: no target servers for DFS failover\n", |
490 | __func__); | |
491 | } else { | |
492 | server->nr_targets = dfs_cache_get_nr_tgts(&tgt_list); | |
493 | } | |
494 | } | |
495 | cifs_dbg(FYI, "%s: will retry %d target(s)\n", __func__, | |
496 | server->nr_targets); | |
61cabc7b | 497 | spin_lock(&GlobalMid_Lock); |
93d5cb51 | 498 | #endif |
469ee614 | 499 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 500 | /* the demux thread will exit normally |
1da177e4 LT |
501 | next time through the loop */ |
502 | spin_unlock(&GlobalMid_Lock); | |
503 | return rc; | |
504 | } else | |
505 | server->tcpStatus = CifsNeedReconnect; | |
506 | spin_unlock(&GlobalMid_Lock); | |
507 | server->maxBuf = 0; | |
aa24d1e9 | 508 | server->max_read = 0; |
1da177e4 | 509 | |
6e4d3bbe | 510 | cifs_dbg(FYI, "Mark tcp session as need reconnect\n"); |
bf1fdeb7 | 511 | trace_smb3_reconnect(server->CurrentMid, server->hostname); |
1da177e4 LT |
512 | |
513 | /* before reconnecting the tcp session, mark the smb session (uid) | |
514 | and the tid bad so they are not used until reconnected */ | |
f96637be JP |
515 | cifs_dbg(FYI, "%s: marking sessions and tcons for reconnect\n", |
516 | __func__); | |
3f9bcca7 | 517 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 518 | list_for_each(tmp, &server->smb_ses_list) { |
96daf2b0 | 519 | ses = list_entry(tmp, struct cifs_ses, smb_ses_list); |
14fbf50d | 520 | ses->need_reconnect = true; |
f1987b44 | 521 | list_for_each(tmp2, &ses->tcon_list) { |
96daf2b0 | 522 | tcon = list_entry(tmp2, struct cifs_tcon, tcon_list); |
3b795210 | 523 | tcon->need_reconnect = true; |
1da177e4 | 524 | } |
b327a717 AA |
525 | if (ses->tcon_ipc) |
526 | ses->tcon_ipc->need_reconnect = true; | |
1da177e4 | 527 | } |
3f9bcca7 | 528 | spin_unlock(&cifs_tcp_ses_lock); |
2b84a36c | 529 | |
1da177e4 | 530 | /* do not want to be sending data on a socket we are freeing */ |
f96637be | 531 | cifs_dbg(FYI, "%s: tearing down socket\n", __func__); |
72ca545b | 532 | mutex_lock(&server->srv_mutex); |
1d2a4f57 LL |
533 | if (server->ssocket) { |
534 | cifs_dbg(FYI, "State: 0x%x Flags: 0x%lx\n", | |
535 | server->ssocket->state, server->ssocket->flags); | |
536 | kernel_sock_shutdown(server->ssocket, SHUT_WR); | |
537 | cifs_dbg(FYI, "Post shutdown state: 0x%x Flags: 0x%lx\n", | |
538 | server->ssocket->state, server->ssocket->flags); | |
539 | sock_release(server->ssocket); | |
540 | server->ssocket = NULL; | |
541 | } | |
542 | server->sequence_number = 0; | |
543 | server->session_estab = false; | |
544 | kfree(server->session_key.response); | |
545 | server->session_key.response = NULL; | |
546 | server->session_key.len = 0; | |
547 | server->lstrp = jiffies; | |
1da177e4 | 548 | |
2b84a36c | 549 | /* mark submitted MIDs for retry and issue callback */ |
3c1105df | 550 | INIT_LIST_HEAD(&retry_list); |
f96637be | 551 | cifs_dbg(FYI, "%s: moving mids to private list\n", __func__); |
1da177e4 | 552 | spin_lock(&GlobalMid_Lock); |
2b84a36c JL |
553 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
554 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
7c9421e1 PS |
555 | if (mid_entry->mid_state == MID_REQUEST_SUBMITTED) |
556 | mid_entry->mid_state = MID_RETRY_NEEDED; | |
3c1105df JL |
557 | list_move(&mid_entry->qhead, &retry_list); |
558 | } | |
559 | spin_unlock(&GlobalMid_Lock); | |
1d2a4f57 | 560 | mutex_unlock(&server->srv_mutex); |
3c1105df | 561 | |
f96637be | 562 | cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__); |
3c1105df JL |
563 | list_for_each_safe(tmp, tmp2, &retry_list) { |
564 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
2b84a36c JL |
565 | list_del_init(&mid_entry->qhead); |
566 | mid_entry->callback(mid_entry); | |
1da177e4 | 567 | } |
1da177e4 | 568 | |
1d2a4f57 LL |
569 | if (cifs_rdma_enabled(server)) { |
570 | mutex_lock(&server->srv_mutex); | |
214bab44 | 571 | smbd_destroy(server); |
1d2a4f57 LL |
572 | mutex_unlock(&server->srv_mutex); |
573 | } | |
214bab44 | 574 | |
7fdbaa1b | 575 | do { |
6c3d8909 | 576 | try_to_freeze(); |
a9f1b85e | 577 | |
73e216a8 | 578 | mutex_lock(&server->srv_mutex); |
93d5cb51 PA |
579 | /* |
580 | * Set up next DFS target server (if any) for reconnect. If DFS | |
581 | * feature is disabled, then we will retry last server we | |
582 | * connected to before. | |
583 | */ | |
781a8050 LL |
584 | if (cifs_rdma_enabled(server)) |
585 | rc = smbd_reconnect(server); | |
586 | else | |
587 | rc = generic_ip_connect(server); | |
fb8c4b14 | 588 | if (rc) { |
f96637be | 589 | cifs_dbg(FYI, "reconnect error %d\n", rc); |
93d5cb51 PA |
590 | #ifdef CONFIG_CIFS_DFS_UPCALL |
591 | reconn_inval_dfs_target(server, cifs_sb, &tgt_list, | |
592 | &tgt_it); | |
593 | #endif | |
28eb24ff PA |
594 | rc = reconn_set_ipaddr(server); |
595 | if (rc) { | |
596 | cifs_dbg(FYI, "%s: failed to resolve hostname: %d\n", | |
597 | __func__, rc); | |
598 | } | |
4afe260b | 599 | mutex_unlock(&server->srv_mutex); |
0cb766ae | 600 | msleep(3000); |
1da177e4 LT |
601 | } else { |
602 | atomic_inc(&tcpSesReconnectCount); | |
335b7b62 | 603 | set_credits(server, 1); |
1da177e4 | 604 | spin_lock(&GlobalMid_Lock); |
469ee614 | 605 | if (server->tcpStatus != CifsExiting) |
fd88ce93 | 606 | server->tcpStatus = CifsNeedNegotiate; |
fb8c4b14 | 607 | spin_unlock(&GlobalMid_Lock); |
4afe260b | 608 | mutex_unlock(&server->srv_mutex); |
1da177e4 | 609 | } |
7fdbaa1b | 610 | } while (server->tcpStatus == CifsNeedReconnect); |
2b84a36c | 611 | |
93d5cb51 PA |
612 | #ifdef CONFIG_CIFS_DFS_UPCALL |
613 | if (tgt_it) { | |
614 | rc = dfs_cache_noreq_update_tgthint(cifs_sb->origin_fullpath + 1, | |
615 | tgt_it); | |
616 | if (rc) { | |
617 | cifs_dbg(VFS, "%s: failed to update DFS target hint: rc = %d\n", | |
618 | __func__, rc); | |
619 | } | |
620 | rc = dfs_cache_update_vol(cifs_sb->origin_fullpath, server); | |
621 | if (rc) { | |
622 | cifs_dbg(VFS, "%s: failed to update vol info in DFS cache: rc = %d\n", | |
623 | __func__, rc); | |
624 | } | |
23324407 | 625 | dfs_cache_free_tgts(&tgt_list); |
93d5cb51 | 626 | } |
93d5cb51 | 627 | #endif |
b8c60012 SP |
628 | if (server->tcpStatus == CifsNeedNegotiate) |
629 | mod_delayed_work(cifsiod_wq, &server->echo, 0); | |
630 | ||
1da177e4 LT |
631 | return rc; |
632 | } | |
633 | ||
c74093b6 JL |
634 | static void |
635 | cifs_echo_request(struct work_struct *work) | |
636 | { | |
637 | int rc; | |
638 | struct TCP_Server_Info *server = container_of(work, | |
639 | struct TCP_Server_Info, echo.work); | |
b8c60012 SP |
640 | unsigned long echo_interval; |
641 | ||
642 | /* | |
643 | * If we need to renegotiate, set echo interval to zero to | |
644 | * immediately call echo service where we can renegotiate. | |
645 | */ | |
646 | if (server->tcpStatus == CifsNeedNegotiate) | |
647 | echo_interval = 0; | |
648 | else | |
649 | echo_interval = server->echo_interval; | |
c74093b6 | 650 | |
247ec9b4 | 651 | /* |
b8c60012 SP |
652 | * We cannot send an echo if it is disabled. |
653 | * Also, no need to ping if we got a response recently. | |
247ec9b4 | 654 | */ |
4fcd1813 SF |
655 | |
656 | if (server->tcpStatus == CifsNeedReconnect || | |
b8c60012 SP |
657 | server->tcpStatus == CifsExiting || |
658 | server->tcpStatus == CifsNew || | |
f6d76178 | 659 | (server->ops->can_echo && !server->ops->can_echo(server)) || |
adfeb3e0 | 660 | time_before(jiffies, server->lstrp + echo_interval - HZ)) |
c74093b6 JL |
661 | goto requeue_echo; |
662 | ||
f6d76178 | 663 | rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS; |
c74093b6 | 664 | if (rc) |
f96637be JP |
665 | cifs_dbg(FYI, "Unable to send echo request to server: %s\n", |
666 | server->hostname); | |
c74093b6 JL |
667 | |
668 | requeue_echo: | |
b8c60012 | 669 | queue_delayed_work(cifsiod_wq, &server->echo, server->echo_interval); |
c74093b6 JL |
670 | } |
671 | ||
3d9c2472 | 672 | static bool |
2a37ef94 | 673 | allocate_buffers(struct TCP_Server_Info *server) |
3d9c2472 | 674 | { |
2a37ef94 JL |
675 | if (!server->bigbuf) { |
676 | server->bigbuf = (char *)cifs_buf_get(); | |
677 | if (!server->bigbuf) { | |
f96637be | 678 | cifs_dbg(VFS, "No memory for large SMB response\n"); |
3d9c2472 PS |
679 | msleep(3000); |
680 | /* retry will check if exiting */ | |
681 | return false; | |
682 | } | |
2a37ef94 | 683 | } else if (server->large_buf) { |
3d9c2472 | 684 | /* we are reusing a dirty large buf, clear its start */ |
1887f601 | 685 | memset(server->bigbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
686 | } |
687 | ||
2a37ef94 JL |
688 | if (!server->smallbuf) { |
689 | server->smallbuf = (char *)cifs_small_buf_get(); | |
690 | if (!server->smallbuf) { | |
f96637be | 691 | cifs_dbg(VFS, "No memory for SMB response\n"); |
3d9c2472 PS |
692 | msleep(1000); |
693 | /* retry will check if exiting */ | |
694 | return false; | |
695 | } | |
696 | /* beginning of smb buffer is cleared in our buf_get */ | |
697 | } else { | |
698 | /* if existing small buf clear beginning */ | |
1887f601 | 699 | memset(server->smallbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
700 | } |
701 | ||
3d9c2472 PS |
702 | return true; |
703 | } | |
704 | ||
ba749e6d JL |
705 | static bool |
706 | server_unresponsive(struct TCP_Server_Info *server) | |
707 | { | |
6dae51a5 PS |
708 | /* |
709 | * We need to wait 2 echo intervals to make sure we handle such | |
710 | * situations right: | |
711 | * 1s client sends a normal SMB request | |
712 | * 2s client gets a response | |
713 | * 30s echo workqueue job pops, and decides we got a response recently | |
714 | * and don't need to send another | |
715 | * ... | |
716 | * 65s kernel_recvmsg times out, and we see that we haven't gotten | |
717 | * a response in >60s. | |
718 | */ | |
76e75270 SC |
719 | if ((server->tcpStatus == CifsGood || |
720 | server->tcpStatus == CifsNeedNegotiate) && | |
adfeb3e0 SF |
721 | time_after(jiffies, server->lstrp + 2 * server->echo_interval)) { |
722 | cifs_dbg(VFS, "Server %s has not responded in %lu seconds. Reconnecting...\n", | |
723 | server->hostname, (2 * server->echo_interval) / HZ); | |
ba749e6d JL |
724 | cifs_reconnect(server); |
725 | wake_up(&server->response_q); | |
726 | return true; | |
727 | } | |
728 | ||
729 | return false; | |
730 | } | |
731 | ||
ef68e831 PS |
732 | static inline bool |
733 | zero_credits(struct TCP_Server_Info *server) | |
734 | { | |
735 | int val; | |
736 | ||
737 | spin_lock(&server->req_lock); | |
738 | val = server->credits + server->echo_credits + server->oplock_credits; | |
739 | if (server->in_flight == 0 && val == 0) { | |
740 | spin_unlock(&server->req_lock); | |
741 | return true; | |
742 | } | |
743 | spin_unlock(&server->req_lock); | |
744 | return false; | |
745 | } | |
746 | ||
71335664 AV |
747 | static int |
748 | cifs_readv_from_socket(struct TCP_Server_Info *server, struct msghdr *smb_msg) | |
e7015fb1 | 749 | { |
a52c1eb7 JL |
750 | int length = 0; |
751 | int total_read; | |
e7015fb1 | 752 | |
71335664 AV |
753 | smb_msg->msg_control = NULL; |
754 | smb_msg->msg_controllen = 0; | |
e831e6cf | 755 | |
71335664 | 756 | for (total_read = 0; msg_data_left(smb_msg); total_read += length) { |
95edcff4 JL |
757 | try_to_freeze(); |
758 | ||
ef68e831 PS |
759 | /* reconnect if no credits and no requests in flight */ |
760 | if (zero_credits(server)) { | |
761 | cifs_reconnect(server); | |
762 | return -ECONNABORTED; | |
763 | } | |
764 | ||
71335664 AV |
765 | if (server_unresponsive(server)) |
766 | return -ECONNABORTED; | |
2fef137a LL |
767 | if (cifs_rdma_enabled(server) && server->smbd_conn) |
768 | length = smbd_recv(server->smbd_conn, smb_msg); | |
769 | else | |
770 | length = sock_recvmsg(server->ssocket, smb_msg, 0); | |
42c4dfc2 | 771 | |
71335664 AV |
772 | if (server->tcpStatus == CifsExiting) |
773 | return -ESHUTDOWN; | |
e7015fb1 | 774 | |
71335664 | 775 | if (server->tcpStatus == CifsNeedReconnect) { |
e7015fb1 | 776 | cifs_reconnect(server); |
71335664 AV |
777 | return -ECONNABORTED; |
778 | } | |
779 | ||
780 | if (length == -ERESTARTSYS || | |
781 | length == -EAGAIN || | |
782 | length == -EINTR) { | |
e7015fb1 PS |
783 | /* |
784 | * Minimum sleep to prevent looping, allowing socket | |
785 | * to clear and app threads to set tcpStatus | |
786 | * CifsNeedReconnect if server hung. | |
787 | */ | |
788 | usleep_range(1000, 2000); | |
789 | length = 0; | |
a52c1eb7 | 790 | continue; |
71335664 AV |
791 | } |
792 | ||
793 | if (length <= 0) { | |
09aab880 | 794 | cifs_dbg(FYI, "Received no data or error: %d\n", length); |
e7015fb1 | 795 | cifs_reconnect(server); |
71335664 | 796 | return -ECONNABORTED; |
e7015fb1 PS |
797 | } |
798 | } | |
a52c1eb7 | 799 | return total_read; |
e7015fb1 | 800 | } |
e7015fb1 | 801 | |
e28bc5b1 JL |
802 | int |
803 | cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, | |
804 | unsigned int to_read) | |
42c4dfc2 | 805 | { |
71335664 AV |
806 | struct msghdr smb_msg; |
807 | struct kvec iov = {.iov_base = buf, .iov_len = to_read}; | |
aa563d7b | 808 | iov_iter_kvec(&smb_msg.msg_iter, READ, &iov, 1, to_read); |
42c4dfc2 | 809 | |
71335664 AV |
810 | return cifs_readv_from_socket(server, &smb_msg); |
811 | } | |
42c4dfc2 | 812 | |
71335664 AV |
813 | int |
814 | cifs_read_page_from_socket(struct TCP_Server_Info *server, struct page *page, | |
1dbe3466 | 815 | unsigned int page_offset, unsigned int to_read) |
71335664 AV |
816 | { |
817 | struct msghdr smb_msg; | |
1dbe3466 LL |
818 | struct bio_vec bv = { |
819 | .bv_page = page, .bv_len = to_read, .bv_offset = page_offset}; | |
aa563d7b | 820 | iov_iter_bvec(&smb_msg.msg_iter, READ, &bv, 1, to_read); |
71335664 | 821 | return cifs_readv_from_socket(server, &smb_msg); |
e7015fb1 PS |
822 | } |
823 | ||
98bac62c | 824 | static bool |
fe11e4cc | 825 | is_smb_response(struct TCP_Server_Info *server, unsigned char type) |
98bac62c | 826 | { |
98bac62c PS |
827 | /* |
828 | * The first byte big endian of the length field, | |
829 | * is actually not part of the length but the type | |
830 | * with the most common, zero, as regular data. | |
831 | */ | |
fe11e4cc JL |
832 | switch (type) { |
833 | case RFC1002_SESSION_MESSAGE: | |
834 | /* Regular SMB response */ | |
835 | return true; | |
836 | case RFC1002_SESSION_KEEP_ALIVE: | |
f96637be | 837 | cifs_dbg(FYI, "RFC 1002 session keep alive\n"); |
fe11e4cc JL |
838 | break; |
839 | case RFC1002_POSITIVE_SESSION_RESPONSE: | |
f96637be | 840 | cifs_dbg(FYI, "RFC 1002 positive session response\n"); |
fe11e4cc JL |
841 | break; |
842 | case RFC1002_NEGATIVE_SESSION_RESPONSE: | |
98bac62c PS |
843 | /* |
844 | * We get this from Windows 98 instead of an error on | |
845 | * SMB negprot response. | |
846 | */ | |
f96637be | 847 | cifs_dbg(FYI, "RFC 1002 negative session response\n"); |
98bac62c PS |
848 | /* give server a second to clean up */ |
849 | msleep(1000); | |
850 | /* | |
851 | * Always try 445 first on reconnect since we get NACK | |
852 | * on some if we ever connected to port 139 (the NACK | |
853 | * is since we do not begin with RFC1001 session | |
854 | * initialize frame). | |
855 | */ | |
fe11e4cc | 856 | cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT); |
98bac62c PS |
857 | cifs_reconnect(server); |
858 | wake_up(&server->response_q); | |
fe11e4cc JL |
859 | break; |
860 | default: | |
f96637be | 861 | cifs_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type); |
98bac62c | 862 | cifs_reconnect(server); |
98bac62c PS |
863 | } |
864 | ||
fe11e4cc | 865 | return false; |
98bac62c PS |
866 | } |
867 | ||
e28bc5b1 JL |
868 | void |
869 | dequeue_mid(struct mid_q_entry *mid, bool malformed) | |
ea1f4502 | 870 | { |
ad69bae1 | 871 | #ifdef CONFIG_CIFS_STATS2 |
ea1f4502 | 872 | mid->when_received = jiffies; |
ad69bae1 | 873 | #endif |
ea1f4502 JL |
874 | spin_lock(&GlobalMid_Lock); |
875 | if (!malformed) | |
7c9421e1 | 876 | mid->mid_state = MID_RESPONSE_RECEIVED; |
ea1f4502 | 877 | else |
7c9421e1 | 878 | mid->mid_state = MID_RESPONSE_MALFORMED; |
ddf83afb RS |
879 | /* |
880 | * Trying to handle/dequeue a mid after the send_recv() | |
881 | * function has finished processing it is a bug. | |
882 | */ | |
883 | if (mid->mid_flags & MID_DELETED) | |
884 | printk_once(KERN_WARNING | |
885 | "trying to dequeue a deleted mid\n"); | |
886 | else | |
887 | list_del_init(&mid->qhead); | |
ad69bae1 | 888 | spin_unlock(&GlobalMid_Lock); |
ea1f4502 | 889 | } |
ad69bae1 | 890 | |
c8054ebd JL |
891 | static void |
892 | handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, | |
d4e4854f | 893 | char *buf, int malformed) |
ea1f4502 | 894 | { |
316cf94a PS |
895 | if (server->ops->check_trans2 && |
896 | server->ops->check_trans2(mid, server, buf, malformed)) | |
c8054ebd | 897 | return; |
ea1f4502 | 898 | mid->resp_buf = buf; |
7c9421e1 | 899 | mid->large_buf = server->large_buf; |
2a37ef94 JL |
900 | /* Was previous buf put in mpx struct for multi-rsp? */ |
901 | if (!mid->multiRsp) { | |
902 | /* smb buffer will be freed by user thread */ | |
903 | if (server->large_buf) | |
904 | server->bigbuf = NULL; | |
905 | else | |
906 | server->smallbuf = NULL; | |
907 | } | |
ffc00e27 | 908 | dequeue_mid(mid, malformed); |
ad69bae1 PS |
909 | } |
910 | ||
762dfd10 PS |
911 | static void clean_demultiplex_info(struct TCP_Server_Info *server) |
912 | { | |
913 | int length; | |
914 | ||
915 | /* take it off the list, if it's not already */ | |
916 | spin_lock(&cifs_tcp_ses_lock); | |
917 | list_del_init(&server->tcp_ses_list); | |
918 | spin_unlock(&cifs_tcp_ses_lock); | |
919 | ||
920 | spin_lock(&GlobalMid_Lock); | |
921 | server->tcpStatus = CifsExiting; | |
922 | spin_unlock(&GlobalMid_Lock); | |
923 | wake_up_all(&server->response_q); | |
924 | ||
2d86dbc9 | 925 | /* check if we have blocked requests that need to free */ |
fc40f9cf | 926 | spin_lock(&server->req_lock); |
2d86dbc9 PS |
927 | if (server->credits <= 0) |
928 | server->credits = 1; | |
fc40f9cf | 929 | spin_unlock(&server->req_lock); |
762dfd10 PS |
930 | /* |
931 | * Although there should not be any requests blocked on this queue it | |
932 | * can not hurt to be paranoid and try to wake up requests that may | |
933 | * haven been blocked when more than 50 at time were on the wire to the | |
934 | * same server - they now will see the session is in exit state and get | |
935 | * out of SendReceive. | |
936 | */ | |
937 | wake_up_all(&server->request_q); | |
938 | /* give those requests time to exit */ | |
939 | msleep(125); | |
050b8c37 LL |
940 | if (cifs_rdma_enabled(server)) |
941 | smbd_destroy(server); | |
762dfd10 PS |
942 | if (server->ssocket) { |
943 | sock_release(server->ssocket); | |
944 | server->ssocket = NULL; | |
945 | } | |
946 | ||
947 | if (!list_empty(&server->pending_mid_q)) { | |
948 | struct list_head dispose_list; | |
949 | struct mid_q_entry *mid_entry; | |
950 | struct list_head *tmp, *tmp2; | |
951 | ||
952 | INIT_LIST_HEAD(&dispose_list); | |
953 | spin_lock(&GlobalMid_Lock); | |
954 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { | |
955 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
f96637be | 956 | cifs_dbg(FYI, "Clearing mid 0x%llx\n", mid_entry->mid); |
7c9421e1 | 957 | mid_entry->mid_state = MID_SHUTDOWN; |
762dfd10 PS |
958 | list_move(&mid_entry->qhead, &dispose_list); |
959 | } | |
960 | spin_unlock(&GlobalMid_Lock); | |
961 | ||
962 | /* now walk dispose list and issue callbacks */ | |
963 | list_for_each_safe(tmp, tmp2, &dispose_list) { | |
964 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
f96637be | 965 | cifs_dbg(FYI, "Callback mid 0x%llx\n", mid_entry->mid); |
762dfd10 PS |
966 | list_del_init(&mid_entry->qhead); |
967 | mid_entry->callback(mid_entry); | |
968 | } | |
969 | /* 1/8th of sec is more than enough time for them to exit */ | |
970 | msleep(125); | |
971 | } | |
972 | ||
973 | if (!list_empty(&server->pending_mid_q)) { | |
974 | /* | |
975 | * mpx threads have not exited yet give them at least the smb | |
976 | * send timeout time for long ops. | |
977 | * | |
978 | * Due to delays on oplock break requests, we need to wait at | |
979 | * least 45 seconds before giving up on a request getting a | |
980 | * response and going ahead and killing cifsd. | |
981 | */ | |
f96637be | 982 | cifs_dbg(FYI, "Wait for exit from demultiplex thread\n"); |
762dfd10 PS |
983 | msleep(46000); |
984 | /* | |
985 | * If threads still have not exited they are probably never | |
986 | * coming home not much else we can do but free the memory. | |
987 | */ | |
988 | } | |
989 | ||
990 | kfree(server->hostname); | |
991 | kfree(server); | |
992 | ||
993 | length = atomic_dec_return(&tcpSesAllocCount); | |
994 | if (length > 0) | |
11d83360 | 995 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv); |
762dfd10 PS |
996 | } |
997 | ||
e9097ab4 JL |
998 | static int |
999 | standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
1000 | { | |
1001 | int length; | |
1002 | char *buf = server->smallbuf; | |
2e96467d | 1003 | unsigned int pdu_length = server->pdu_size; |
e9097ab4 JL |
1004 | |
1005 | /* make sure this will fit in a large buffer */ | |
93012bf9 RS |
1006 | if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - |
1007 | server->vals->header_preamble_size) { | |
f96637be | 1008 | cifs_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length); |
e9097ab4 JL |
1009 | cifs_reconnect(server); |
1010 | wake_up(&server->response_q); | |
3fabaa27 | 1011 | return -ECONNABORTED; |
e9097ab4 JL |
1012 | } |
1013 | ||
1014 | /* switch to large buffer if too big for a small one */ | |
1015 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { | |
1016 | server->large_buf = true; | |
d4e4854f | 1017 | memcpy(server->bigbuf, buf, server->total_read); |
e9097ab4 | 1018 | buf = server->bigbuf; |
e9097ab4 JL |
1019 | } |
1020 | ||
1021 | /* now read the rest */ | |
1887f601 | 1022 | length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, |
93012bf9 RS |
1023 | pdu_length - HEADER_SIZE(server) + 1 |
1024 | + server->vals->header_preamble_size); | |
1025 | ||
e9097ab4 JL |
1026 | if (length < 0) |
1027 | return length; | |
1028 | server->total_read += length; | |
1029 | ||
d4e4854f | 1030 | dump_smb(buf, server->total_read); |
e9097ab4 | 1031 | |
4326ed2f PS |
1032 | return cifs_handle_standard(server, mid); |
1033 | } | |
1034 | ||
1035 | int | |
1036 | cifs_handle_standard(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
1037 | { | |
1038 | char *buf = server->large_buf ? server->bigbuf : server->smallbuf; | |
1039 | int length; | |
1040 | ||
e9097ab4 JL |
1041 | /* |
1042 | * We know that we received enough to get to the MID as we | |
1043 | * checked the pdu_length earlier. Now check to see | |
1044 | * if the rest of the header is OK. We borrow the length | |
1045 | * var for the rest of the loop to avoid a new stack var. | |
1046 | * | |
1047 | * 48 bytes is enough to display the header and a little bit | |
1048 | * into the payload for debugging purposes. | |
1049 | */ | |
373512ec | 1050 | length = server->ops->check_message(buf, server->total_read, server); |
e9097ab4 JL |
1051 | if (length != 0) |
1052 | cifs_dump_mem("Bad SMB: ", buf, | |
1053 | min_t(unsigned int, server->total_read, 48)); | |
1054 | ||
511c54a2 PS |
1055 | if (server->ops->is_session_expired && |
1056 | server->ops->is_session_expired(buf)) { | |
1057 | cifs_reconnect(server); | |
1058 | wake_up(&server->response_q); | |
1059 | return -1; | |
1060 | } | |
1061 | ||
2e44b288 | 1062 | if (server->ops->is_status_pending && |
66265f13 | 1063 | server->ops->is_status_pending(buf, server)) |
2e44b288 PS |
1064 | return -1; |
1065 | ||
ff4fa4a2 JL |
1066 | if (!mid) |
1067 | return length; | |
e9097ab4 | 1068 | |
d4e4854f | 1069 | handle_mid(mid, server, buf, length); |
ff4fa4a2 | 1070 | return 0; |
e9097ab4 JL |
1071 | } |
1072 | ||
eca00452 RS |
1073 | static void |
1074 | smb2_add_credits_from_hdr(char *buffer, struct TCP_Server_Info *server) | |
1075 | { | |
1076 | struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buffer; | |
1077 | ||
1078 | /* | |
1079 | * SMB1 does not use credits. | |
1080 | */ | |
1081 | if (server->vals->header_preamble_size) | |
1082 | return; | |
1083 | ||
1084 | if (shdr->CreditRequest) { | |
1085 | spin_lock(&server->req_lock); | |
1086 | server->credits += le16_to_cpu(shdr->CreditRequest); | |
1087 | spin_unlock(&server->req_lock); | |
1088 | wake_up(&server->request_q); | |
1089 | } | |
1090 | } | |
1091 | ||
1092 | ||
1da177e4 | 1093 | static int |
7c97c200 | 1094 | cifs_demultiplex_thread(void *p) |
1da177e4 | 1095 | { |
b24df3e3 | 1096 | int i, num_mids, length; |
7c97c200 | 1097 | struct TCP_Server_Info *server = p; |
2a37ef94 | 1098 | unsigned int pdu_length; |
8ce79ec3 | 1099 | unsigned int next_offset; |
2a37ef94 | 1100 | char *buf = NULL; |
a5c3e1c7 | 1101 | struct task_struct *task_to_wake = NULL; |
b24df3e3 RS |
1102 | struct mid_q_entry *mids[MAX_COMPOUND]; |
1103 | char *bufs[MAX_COMPOUND]; | |
1da177e4 | 1104 | |
1da177e4 | 1105 | current->flags |= PF_MEMALLOC; |
f96637be | 1106 | cifs_dbg(FYI, "Demultiplex PID: %d\n", task_pid_nr(current)); |
93d0ec85 JL |
1107 | |
1108 | length = atomic_inc_return(&tcpSesAllocCount); | |
1109 | if (length > 1) | |
11d83360 | 1110 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv); |
1da177e4 | 1111 | |
83144186 | 1112 | set_freezable(); |
469ee614 | 1113 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
1114 | if (try_to_freeze()) |
1115 | continue; | |
b8643e1b | 1116 | |
2a37ef94 | 1117 | if (!allocate_buffers(server)) |
3d9c2472 | 1118 | continue; |
b8643e1b | 1119 | |
2a37ef94 | 1120 | server->large_buf = false; |
2a37ef94 | 1121 | buf = server->smallbuf; |
f01d5e14 | 1122 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 1123 | |
e28bc5b1 | 1124 | length = cifs_read_from_socket(server, buf, pdu_length); |
a52c1eb7 | 1125 | if (length < 0) |
1da177e4 | 1126 | continue; |
977b6170 RS |
1127 | |
1128 | if (server->vals->header_preamble_size == 0) | |
1129 | server->total_read = 0; | |
1130 | else | |
1131 | server->total_read = length; | |
1da177e4 | 1132 | |
98bac62c PS |
1133 | /* |
1134 | * The right amount was read from socket - 4 bytes, | |
1135 | * so we can now interpret the length field. | |
1136 | */ | |
d4e4854f | 1137 | pdu_length = get_rfc1002_length(buf); |
70ca734a | 1138 | |
f96637be | 1139 | cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length); |
fe11e4cc | 1140 | if (!is_smb_response(server, buf[0])) |
fb8c4b14 | 1141 | continue; |
8ce79ec3 RS |
1142 | next_pdu: |
1143 | server->pdu_size = pdu_length; | |
e4eb295d | 1144 | |
89482a56 | 1145 | /* make sure we have enough to get to the MID */ |
8ce79ec3 | 1146 | if (server->pdu_size < HEADER_SIZE(server) - 1 - |
93012bf9 | 1147 | server->vals->header_preamble_size) { |
f96637be | 1148 | cifs_dbg(VFS, "SMB response too short (%u bytes)\n", |
8ce79ec3 | 1149 | server->pdu_size); |
89482a56 JL |
1150 | cifs_reconnect(server); |
1151 | wake_up(&server->response_q); | |
1152 | continue; | |
e4eb295d | 1153 | } |
e7015fb1 | 1154 | |
89482a56 | 1155 | /* read down to the MID */ |
93012bf9 RS |
1156 | length = cifs_read_from_socket(server, |
1157 | buf + server->vals->header_preamble_size, | |
1158 | HEADER_SIZE(server) - 1 | |
1159 | - server->vals->header_preamble_size); | |
89482a56 | 1160 | if (length < 0) |
e4eb295d | 1161 | continue; |
2a37ef94 | 1162 | server->total_read += length; |
1da177e4 | 1163 | |
8ce79ec3 RS |
1164 | if (server->ops->next_header) { |
1165 | next_offset = server->ops->next_header(buf); | |
1166 | if (next_offset) | |
1167 | server->pdu_size = next_offset; | |
1168 | } | |
1169 | ||
b24df3e3 RS |
1170 | memset(mids, 0, sizeof(mids)); |
1171 | memset(bufs, 0, sizeof(bufs)); | |
1172 | num_mids = 0; | |
1173 | ||
9bb17e09 PS |
1174 | if (server->ops->is_transform_hdr && |
1175 | server->ops->receive_transform && | |
1176 | server->ops->is_transform_hdr(buf)) { | |
1177 | length = server->ops->receive_transform(server, | |
b24df3e3 RS |
1178 | mids, |
1179 | bufs, | |
1180 | &num_mids); | |
9bb17e09 | 1181 | } else { |
b24df3e3 RS |
1182 | mids[0] = server->ops->find_mid(server, buf); |
1183 | bufs[0] = buf; | |
7af929d6 | 1184 | num_mids = 1; |
50c2f753 | 1185 | |
b24df3e3 RS |
1186 | if (!mids[0] || !mids[0]->receive) |
1187 | length = standard_receive3(server, mids[0]); | |
9bb17e09 | 1188 | else |
b24df3e3 | 1189 | length = mids[0]->receive(server, mids[0]); |
9bb17e09 | 1190 | } |
71823baf | 1191 | |
696e420b | 1192 | if (length < 0) { |
b24df3e3 RS |
1193 | for (i = 0; i < num_mids; i++) |
1194 | if (mids[i]) | |
1195 | cifs_mid_q_entry_release(mids[i]); | |
fe11e4cc | 1196 | continue; |
696e420b | 1197 | } |
1da177e4 | 1198 | |
fda35943 | 1199 | server->lstrp = jiffies; |
38bd4906 | 1200 | |
b24df3e3 RS |
1201 | for (i = 0; i < num_mids; i++) { |
1202 | if (mids[i] != NULL) { | |
1203 | mids[i]->resp_buf_size = server->pdu_size; | |
1204 | if ((mids[i]->mid_flags & MID_WAIT_CANCELLED) && | |
1205 | mids[i]->mid_state == MID_RESPONSE_RECEIVED && | |
1206 | server->ops->handle_cancelled_mid) | |
1207 | server->ops->handle_cancelled_mid( | |
1208 | mids[i]->resp_buf, | |
1209 | server); | |
696e420b | 1210 | |
b24df3e3 RS |
1211 | if (!mids[i]->multiRsp || mids[i]->multiEnd) |
1212 | mids[i]->callback(mids[i]); | |
1213 | ||
1214 | cifs_mid_q_entry_release(mids[i]); | |
1215 | } else if (server->ops->is_oplock_break && | |
1216 | server->ops->is_oplock_break(bufs[i], | |
1217 | server)) { | |
eca00452 | 1218 | smb2_add_credits_from_hdr(bufs[i], server); |
b24df3e3 RS |
1219 | cifs_dbg(FYI, "Received oplock break\n"); |
1220 | } else { | |
1221 | cifs_dbg(VFS, "No task to wake, unknown frame " | |
1222 | "received! NumMids %d\n", | |
1223 | atomic_read(&midCount)); | |
1224 | cifs_dump_mem("Received Data is: ", bufs[i], | |
1225 | HEADER_SIZE(server)); | |
3979877e | 1226 | #ifdef CONFIG_CIFS_DEBUG2 |
b24df3e3 RS |
1227 | if (server->ops->dump_detail) |
1228 | server->ops->dump_detail(bufs[i], | |
1229 | server); | |
eca00452 | 1230 | smb2_add_credits_from_hdr(bufs[i], server); |
b24df3e3 | 1231 | cifs_dump_mids(server); |
3979877e | 1232 | #endif /* CIFS_DEBUG2 */ |
b24df3e3 | 1233 | } |
8ce79ec3 | 1234 | } |
b24df3e3 | 1235 | |
8ce79ec3 RS |
1236 | if (pdu_length > server->pdu_size) { |
1237 | if (!allocate_buffers(server)) | |
1238 | continue; | |
1239 | pdu_length -= server->pdu_size; | |
1240 | server->total_read = 0; | |
1241 | server->large_buf = false; | |
1242 | buf = server->smallbuf; | |
1243 | goto next_pdu; | |
e4eb295d SF |
1244 | } |
1245 | } /* end while !EXITING */ | |
1246 | ||
fd62cb7e | 1247 | /* buffer usually freed in free_mid - need to free it here on exit */ |
2a37ef94 JL |
1248 | cifs_buf_release(server->bigbuf); |
1249 | if (server->smallbuf) /* no sense logging a debug message if NULL */ | |
1250 | cifs_small_buf_release(server->smallbuf); | |
1da177e4 | 1251 | |
a5c3e1c7 | 1252 | task_to_wake = xchg(&server->tsk, NULL); |
762dfd10 | 1253 | clean_demultiplex_info(server); |
a5c3e1c7 SF |
1254 | |
1255 | /* if server->tsk was NULL then wait for a signal before exiting */ | |
1256 | if (!task_to_wake) { | |
1257 | set_current_state(TASK_INTERRUPTIBLE); | |
1258 | while (!signal_pending(current)) { | |
1259 | schedule(); | |
1260 | set_current_state(TASK_INTERRUPTIBLE); | |
1261 | } | |
1262 | set_current_state(TASK_RUNNING); | |
1263 | } | |
1264 | ||
0468a2cf | 1265 | module_put_and_exit(0); |
1da177e4 LT |
1266 | } |
1267 | ||
c359cf3c JL |
1268 | /* extract the host portion of the UNC string */ |
1269 | static char * | |
1270 | extract_hostname(const char *unc) | |
1271 | { | |
1272 | const char *src; | |
1273 | char *dst, *delim; | |
1274 | unsigned int len; | |
1275 | ||
1276 | /* skip double chars at beginning of string */ | |
1277 | /* BB: check validity of these bytes? */ | |
c34fea5a PA |
1278 | if (strlen(unc) < 3) |
1279 | return ERR_PTR(-EINVAL); | |
1280 | for (src = unc; *src && *src == '\\'; src++) | |
1281 | ; | |
1282 | if (!*src) | |
1283 | return ERR_PTR(-EINVAL); | |
c359cf3c JL |
1284 | |
1285 | /* delimiter between hostname and sharename is always '\\' now */ | |
1286 | delim = strchr(src, '\\'); | |
1287 | if (!delim) | |
1288 | return ERR_PTR(-EINVAL); | |
1289 | ||
1290 | len = delim - src; | |
1291 | dst = kmalloc((len + 1), GFP_KERNEL); | |
1292 | if (dst == NULL) | |
1293 | return ERR_PTR(-ENOMEM); | |
1294 | ||
1295 | memcpy(dst, src, len); | |
1296 | dst[len] = '\0'; | |
1297 | ||
1298 | return dst; | |
1299 | } | |
1300 | ||
8830d7e0 SP |
1301 | static int get_option_ul(substring_t args[], unsigned long *option) |
1302 | { | |
1303 | int rc; | |
1304 | char *string; | |
1305 | ||
1306 | string = match_strdup(args); | |
1307 | if (string == NULL) | |
1308 | return -ENOMEM; | |
bfa890a3 | 1309 | rc = kstrtoul(string, 0, option); |
8830d7e0 SP |
1310 | kfree(string); |
1311 | ||
1312 | return rc; | |
1313 | } | |
1314 | ||
3da46565 EB |
1315 | static int get_option_uid(substring_t args[], kuid_t *result) |
1316 | { | |
1317 | unsigned long value; | |
1318 | kuid_t uid; | |
1319 | int rc; | |
1320 | ||
1321 | rc = get_option_ul(args, &value); | |
1322 | if (rc) | |
1323 | return rc; | |
1324 | ||
1325 | uid = make_kuid(current_user_ns(), value); | |
1326 | if (!uid_valid(uid)) | |
1327 | return -EINVAL; | |
1328 | ||
1329 | *result = uid; | |
1330 | return 0; | |
1331 | } | |
1332 | ||
1333 | static int get_option_gid(substring_t args[], kgid_t *result) | |
1334 | { | |
1335 | unsigned long value; | |
1336 | kgid_t gid; | |
1337 | int rc; | |
1338 | ||
1339 | rc = get_option_ul(args, &value); | |
1340 | if (rc) | |
1341 | return rc; | |
1342 | ||
1343 | gid = make_kgid(current_user_ns(), value); | |
1344 | if (!gid_valid(gid)) | |
1345 | return -EINVAL; | |
1346 | ||
1347 | *result = gid; | |
1348 | return 0; | |
1349 | } | |
8830d7e0 SP |
1350 | |
1351 | static int cifs_parse_security_flavors(char *value, | |
1352 | struct smb_vol *vol) | |
1353 | { | |
1354 | ||
1355 | substring_t args[MAX_OPT_ARGS]; | |
1356 | ||
1e3cc57e JL |
1357 | /* |
1358 | * With mount options, the last one should win. Reset any existing | |
1359 | * settings back to default. | |
1360 | */ | |
1361 | vol->sectype = Unspecified; | |
1362 | vol->sign = false; | |
1363 | ||
8830d7e0 | 1364 | switch (match_token(value, cifs_secflavor_tokens, args)) { |
3f618223 JL |
1365 | case Opt_sec_krb5p: |
1366 | cifs_dbg(VFS, "sec=krb5p is not supported!\n"); | |
1367 | return 1; | |
1368 | case Opt_sec_krb5i: | |
1369 | vol->sign = true; | |
1370 | /* Fallthrough */ | |
8830d7e0 | 1371 | case Opt_sec_krb5: |
1e3cc57e | 1372 | vol->sectype = Kerberos; |
8830d7e0 | 1373 | break; |
3f618223 | 1374 | case Opt_sec_ntlmsspi: |
1e3cc57e | 1375 | vol->sign = true; |
3f618223 | 1376 | /* Fallthrough */ |
8830d7e0 | 1377 | case Opt_sec_ntlmssp: |
1e3cc57e | 1378 | vol->sectype = RawNTLMSSP; |
8830d7e0 | 1379 | break; |
3f618223 | 1380 | case Opt_sec_ntlmi: |
1e3cc57e | 1381 | vol->sign = true; |
3f618223 | 1382 | /* Fallthrough */ |
8830d7e0 | 1383 | case Opt_ntlm: |
1e3cc57e | 1384 | vol->sectype = NTLM; |
8830d7e0 | 1385 | break; |
3f618223 | 1386 | case Opt_sec_ntlmv2i: |
1e3cc57e | 1387 | vol->sign = true; |
3f618223 | 1388 | /* Fallthrough */ |
7659624f | 1389 | case Opt_sec_ntlmv2: |
1e3cc57e | 1390 | vol->sectype = NTLMv2; |
8830d7e0 SP |
1391 | break; |
1392 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
1393 | case Opt_sec_lanman: | |
1e3cc57e | 1394 | vol->sectype = LANMAN; |
8830d7e0 SP |
1395 | break; |
1396 | #endif | |
1397 | case Opt_sec_none: | |
1398 | vol->nullauth = 1; | |
1399 | break; | |
1400 | default: | |
f96637be | 1401 | cifs_dbg(VFS, "bad security option: %s\n", value); |
8830d7e0 SP |
1402 | return 1; |
1403 | } | |
1404 | ||
1405 | return 0; | |
1406 | } | |
1407 | ||
15b6a473 JL |
1408 | static int |
1409 | cifs_parse_cache_flavor(char *value, struct smb_vol *vol) | |
1410 | { | |
1411 | substring_t args[MAX_OPT_ARGS]; | |
1412 | ||
1413 | switch (match_token(value, cifs_cacheflavor_tokens, args)) { | |
1414 | case Opt_cache_loose: | |
1415 | vol->direct_io = false; | |
1416 | vol->strict_io = false; | |
1417 | break; | |
1418 | case Opt_cache_strict: | |
1419 | vol->direct_io = false; | |
1420 | vol->strict_io = true; | |
1421 | break; | |
1422 | case Opt_cache_none: | |
1423 | vol->direct_io = true; | |
1424 | vol->strict_io = false; | |
1425 | break; | |
1426 | default: | |
f96637be | 1427 | cifs_dbg(VFS, "bad cache= option: %s\n", value); |
15b6a473 JL |
1428 | return 1; |
1429 | } | |
1430 | return 0; | |
1431 | } | |
1432 | ||
23db65f5 | 1433 | static int |
c7c137b9 | 1434 | cifs_parse_smb_version(char *value, struct smb_vol *vol, bool is_smb3) |
23db65f5 JL |
1435 | { |
1436 | substring_t args[MAX_OPT_ARGS]; | |
1437 | ||
1438 | switch (match_token(value, cifs_smb_version_tokens, args)) { | |
7420451f | 1439 | #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY |
23db65f5 | 1440 | case Smb_1: |
f92a720e SF |
1441 | if (disable_legacy_dialects) { |
1442 | cifs_dbg(VFS, "mount with legacy dialect disabled\n"); | |
1443 | return 1; | |
1444 | } | |
c7c137b9 SF |
1445 | if (is_smb3) { |
1446 | cifs_dbg(VFS, "vers=1.0 (cifs) not permitted when mounting with smb3\n"); | |
1447 | return 1; | |
1448 | } | |
23db65f5 JL |
1449 | vol->ops = &smb1_operations; |
1450 | vol->vals = &smb1_values; | |
1451 | break; | |
dd446b16 | 1452 | case Smb_20: |
f92a720e SF |
1453 | if (disable_legacy_dialects) { |
1454 | cifs_dbg(VFS, "mount with legacy dialect disabled\n"); | |
1455 | return 1; | |
1456 | } | |
c7c137b9 SF |
1457 | if (is_smb3) { |
1458 | cifs_dbg(VFS, "vers=2.0 not permitted when mounting with smb3\n"); | |
1459 | return 1; | |
1460 | } | |
53ef1016 | 1461 | vol->ops = &smb20_operations; |
dd446b16 SF |
1462 | vol->vals = &smb20_values; |
1463 | break; | |
7420451f SF |
1464 | #else |
1465 | case Smb_1: | |
1466 | cifs_dbg(VFS, "vers=1.0 (cifs) mount not permitted when legacy dialects disabled\n"); | |
1467 | return 1; | |
1468 | case Smb_20: | |
1469 | cifs_dbg(VFS, "vers=2.0 mount not permitted when legacy dialects disabled\n"); | |
1470 | return 1; | |
1471 | #endif /* CIFS_ALLOW_INSECURE_LEGACY */ | |
1080ef75 SF |
1472 | case Smb_21: |
1473 | vol->ops = &smb21_operations; | |
1474 | vol->vals = &smb21_values; | |
1475 | break; | |
e4aa25e7 | 1476 | case Smb_30: |
38107d45 | 1477 | vol->ops = &smb30_operations; |
e4aa25e7 SF |
1478 | vol->vals = &smb30_values; |
1479 | break; | |
20b6d8b4 SF |
1480 | case Smb_302: |
1481 | vol->ops = &smb30_operations; /* currently identical with 3.0 */ | |
1482 | vol->vals = &smb302_values; | |
1483 | break; | |
5f7fbf73 | 1484 | case Smb_311: |
aab1893d | 1485 | vol->ops = &smb311_operations; |
5f7fbf73 SF |
1486 | vol->vals = &smb311_values; |
1487 | break; | |
9764c02f SF |
1488 | case Smb_3any: |
1489 | vol->ops = &smb30_operations; /* currently identical with 3.0 */ | |
1490 | vol->vals = &smb3any_values; | |
1491 | break; | |
1492 | case Smb_default: | |
1493 | vol->ops = &smb30_operations; /* currently identical with 3.0 */ | |
1494 | vol->vals = &smbdefault_values; | |
1495 | break; | |
23db65f5 | 1496 | default: |
f96637be | 1497 | cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value); |
23db65f5 JL |
1498 | return 1; |
1499 | } | |
1500 | return 0; | |
1501 | } | |
1502 | ||
d387a5c5 JL |
1503 | /* |
1504 | * Parse a devname into substrings and populate the vol->UNC and vol->prepath | |
1505 | * fields with the result. Returns 0 on success and an error otherwise. | |
1506 | */ | |
1507 | static int | |
1508 | cifs_parse_devname(const char *devname, struct smb_vol *vol) | |
1509 | { | |
1510 | char *pos; | |
1511 | const char *delims = "/\\"; | |
1512 | size_t len; | |
1513 | ||
68e2672f YL |
1514 | if (unlikely(!devname || !*devname)) { |
1515 | cifs_dbg(VFS, "Device name not specified.\n"); | |
1516 | return -EINVAL; | |
1517 | } | |
1518 | ||
d387a5c5 JL |
1519 | /* make sure we have a valid UNC double delimiter prefix */ |
1520 | len = strspn(devname, delims); | |
1521 | if (len != 2) | |
1522 | return -EINVAL; | |
1523 | ||
1524 | /* find delimiter between host and sharename */ | |
1525 | pos = strpbrk(devname + 2, delims); | |
1526 | if (!pos) | |
1527 | return -EINVAL; | |
1528 | ||
1529 | /* skip past delimiter */ | |
1530 | ++pos; | |
1531 | ||
1532 | /* now go until next delimiter or end of string */ | |
1533 | len = strcspn(pos, delims); | |
1534 | ||
1535 | /* move "pos" up to delimiter or NULL */ | |
1536 | pos += len; | |
1537 | vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL); | |
1538 | if (!vol->UNC) | |
1539 | return -ENOMEM; | |
1540 | ||
1541 | convert_delimiter(vol->UNC, '\\'); | |
1542 | ||
11e31647 SP |
1543 | /* skip any delimiter */ |
1544 | if (*pos == '/' || *pos == '\\') | |
1545 | pos++; | |
1546 | ||
1547 | /* If pos is NULL then no prepath */ | |
1548 | if (!*pos) | |
d387a5c5 JL |
1549 | return 0; |
1550 | ||
1551 | vol->prepath = kstrdup(pos, GFP_KERNEL); | |
1552 | if (!vol->prepath) | |
1553 | return -ENOMEM; | |
1554 | ||
1555 | return 0; | |
1556 | } | |
1557 | ||
1da177e4 | 1558 | static int |
b946845a | 1559 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
c7c137b9 | 1560 | struct smb_vol *vol, bool is_smb3) |
1da177e4 | 1561 | { |
8830d7e0 | 1562 | char *data, *end; |
957df453 | 1563 | char *mountdata_copy = NULL, *options; |
1da177e4 LT |
1564 | unsigned int temp_len, i, j; |
1565 | char separator[2]; | |
9b9d6b24 JL |
1566 | short int override_uid = -1; |
1567 | short int override_gid = -1; | |
1568 | bool uid_specified = false; | |
1569 | bool gid_specified = false; | |
d8162558 JL |
1570 | bool sloppy = false; |
1571 | char *invalid = NULL; | |
88463999 | 1572 | char *nodename = utsname()->nodename; |
8830d7e0 SP |
1573 | char *string = NULL; |
1574 | char *tmp_end, *value; | |
1575 | char delim; | |
b979aaa1 | 1576 | bool got_ip = false; |
7e682f76 | 1577 | bool got_version = false; |
b979aaa1 JL |
1578 | unsigned short port = 0; |
1579 | struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr; | |
1da177e4 LT |
1580 | |
1581 | separator[0] = ','; | |
50c2f753 | 1582 | separator[1] = 0; |
8830d7e0 | 1583 | delim = separator[0]; |
1da177e4 | 1584 | |
6ee9542a JL |
1585 | /* ensure we always start with zeroed-out smb_vol */ |
1586 | memset(vol, 0, sizeof(*vol)); | |
1587 | ||
88463999 JL |
1588 | /* |
1589 | * does not have to be perfect mapping since field is | |
1590 | * informational, only used for servers that do not support | |
1591 | * port 445 and it can be overridden at mount time | |
1592 | */ | |
1397f2ee JL |
1593 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
1594 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
1595 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
1596 | ||
1397f2ee | 1597 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
1598 | /* null target name indicates to use *SMBSERVR default called name |
1599 | if we end up sending RFC1001 session initialize */ | |
1600 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
1601 | vol->cred_uid = current_uid(); |
1602 | vol->linux_uid = current_uid(); | |
a001e5b5 | 1603 | vol->linux_gid = current_gid(); |
e8506d25 | 1604 | vol->bsize = 1024 * 1024; /* can improve cp performance significantly */ |
2baa2682 SF |
1605 | /* |
1606 | * default to SFM style remapping of seven reserved characters | |
1607 | * unless user overrides it or we negotiate CIFS POSIX where | |
1608 | * it is unnecessary. Can not simultaneously use more than one mapping | |
1609 | * since then readdir could list files that open could not open | |
1610 | */ | |
1611 | vol->remap = true; | |
1612 | ||
f55ed1a8 JL |
1613 | /* default to only allowing write access to owner of the mount */ |
1614 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
1615 | |
1616 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
1617 | /* default is always to request posix paths. */ |
1618 | vol->posix_paths = 1; | |
a0c9217f JL |
1619 | /* default to using server inode numbers where available */ |
1620 | vol->server_ino = 1; | |
ac67055e | 1621 | |
1b359204 JL |
1622 | /* default is to use strict cifs caching semantics */ |
1623 | vol->strict_io = true; | |
1624 | ||
6d20e840 SJ |
1625 | vol->actimeo = CIFS_DEF_ACTIMEO; |
1626 | ||
ca567eb2 SF |
1627 | /* Most clients set timeout to 0, allows server to use its default */ |
1628 | vol->handle_timeout = 0; /* See MS-SMB2 spec section 2.2.14.2.12 */ | |
1629 | ||
9764c02f SF |
1630 | /* offer SMB2.1 and later (SMB3 etc). Secure and widely accepted */ |
1631 | vol->ops = &smb30_operations; | |
1632 | vol->vals = &smbdefault_values; | |
23db65f5 | 1633 | |
b782fcc1 RV |
1634 | vol->echo_interval = SMB_ECHO_INTERVAL_DEFAULT; |
1635 | ||
b946845a SF |
1636 | if (!mountdata) |
1637 | goto cifs_parse_mount_err; | |
1638 | ||
1639 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); | |
1640 | if (!mountdata_copy) | |
1641 | goto cifs_parse_mount_err; | |
1da177e4 | 1642 | |
b946845a | 1643 | options = mountdata_copy; |
4906e50b | 1644 | end = options + strlen(options); |
8830d7e0 | 1645 | |
50c2f753 | 1646 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 1647 | if (options[4] != 0) { |
1da177e4 LT |
1648 | separator[0] = options[4]; |
1649 | options += 5; | |
1650 | } else { | |
f96637be | 1651 | cifs_dbg(FYI, "Null separator not allowed\n"); |
1da177e4 LT |
1652 | } |
1653 | } | |
3d3ea8e6 SP |
1654 | vol->backupuid_specified = false; /* no backup intent for a user */ |
1655 | vol->backupgid_specified = false; /* no backup intent for a group */ | |
50c2f753 | 1656 | |
37d4f99b JL |
1657 | switch (cifs_parse_devname(devname, vol)) { |
1658 | case 0: | |
1659 | break; | |
1660 | case -ENOMEM: | |
1661 | cifs_dbg(VFS, "Unable to allocate memory for devname.\n"); | |
1662 | goto cifs_parse_mount_err; | |
1663 | case -EINVAL: | |
1664 | cifs_dbg(VFS, "Malformed UNC in devname.\n"); | |
1665 | goto cifs_parse_mount_err; | |
1666 | default: | |
1667 | cifs_dbg(VFS, "Unknown error parsing devname.\n"); | |
1668 | goto cifs_parse_mount_err; | |
d387a5c5 JL |
1669 | } |
1670 | ||
1da177e4 | 1671 | while ((data = strsep(&options, separator)) != NULL) { |
8830d7e0 SP |
1672 | substring_t args[MAX_OPT_ARGS]; |
1673 | unsigned long option; | |
1674 | int token; | |
1675 | ||
1da177e4 LT |
1676 | if (!*data) |
1677 | continue; | |
1da177e4 | 1678 | |
8830d7e0 SP |
1679 | token = match_token(data, cifs_mount_option_tokens, args); |
1680 | ||
1681 | switch (token) { | |
1682 | ||
1683 | /* Ingnore the following */ | |
1684 | case Opt_ignore: | |
1685 | break; | |
1686 | ||
1687 | /* Boolean values */ | |
1688 | case Opt_user_xattr: | |
1da177e4 | 1689 | vol->no_xattr = 0; |
8830d7e0 SP |
1690 | break; |
1691 | case Opt_nouser_xattr: | |
1da177e4 | 1692 | vol->no_xattr = 1; |
8830d7e0 SP |
1693 | break; |
1694 | case Opt_forceuid: | |
9b9d6b24 | 1695 | override_uid = 1; |
8830d7e0 SP |
1696 | break; |
1697 | case Opt_noforceuid: | |
9b9d6b24 | 1698 | override_uid = 0; |
8830d7e0 | 1699 | break; |
72bd481f JL |
1700 | case Opt_forcegid: |
1701 | override_gid = 1; | |
1702 | break; | |
1703 | case Opt_noforcegid: | |
1704 | override_gid = 0; | |
1705 | break; | |
8830d7e0 | 1706 | case Opt_noblocksend: |
edf1ae40 | 1707 | vol->noblocksnd = 1; |
8830d7e0 SP |
1708 | break; |
1709 | case Opt_noautotune: | |
edf1ae40 | 1710 | vol->noautotune = 1; |
8830d7e0 SP |
1711 | break; |
1712 | case Opt_hard: | |
1da177e4 | 1713 | vol->retry = 1; |
8830d7e0 SP |
1714 | break; |
1715 | case Opt_soft: | |
1da177e4 | 1716 | vol->retry = 0; |
8830d7e0 SP |
1717 | break; |
1718 | case Opt_perm: | |
1da177e4 | 1719 | vol->noperm = 0; |
8830d7e0 SP |
1720 | break; |
1721 | case Opt_noperm: | |
1da177e4 | 1722 | vol->noperm = 1; |
8830d7e0 SP |
1723 | break; |
1724 | case Opt_mapchars: | |
2baa2682 SF |
1725 | vol->sfu_remap = true; |
1726 | vol->remap = false; /* disable SFM mapping */ | |
8830d7e0 SP |
1727 | break; |
1728 | case Opt_nomapchars: | |
2baa2682 SF |
1729 | vol->sfu_remap = false; |
1730 | break; | |
1731 | case Opt_mapposix: | |
1732 | vol->remap = true; | |
1733 | vol->sfu_remap = false; /* disable SFU mapping */ | |
1734 | break; | |
1735 | case Opt_nomapposix: | |
1736 | vol->remap = false; | |
8830d7e0 SP |
1737 | break; |
1738 | case Opt_sfu: | |
50c2f753 | 1739 | vol->sfu_emul = 1; |
8830d7e0 SP |
1740 | break; |
1741 | case Opt_nosfu: | |
50c2f753 | 1742 | vol->sfu_emul = 0; |
8830d7e0 SP |
1743 | break; |
1744 | case Opt_nodfs: | |
2c1b8615 | 1745 | vol->nodfs = 1; |
8830d7e0 SP |
1746 | break; |
1747 | case Opt_posixpaths: | |
ac67055e | 1748 | vol->posix_paths = 1; |
8830d7e0 SP |
1749 | break; |
1750 | case Opt_noposixpaths: | |
ac67055e | 1751 | vol->posix_paths = 0; |
8830d7e0 SP |
1752 | break; |
1753 | case Opt_nounix: | |
b326614e SF |
1754 | if (vol->linux_ext) |
1755 | cifs_dbg(VFS, | |
1756 | "conflicting unix mount options\n"); | |
c18c842b | 1757 | vol->no_linux_ext = 1; |
8830d7e0 | 1758 | break; |
b326614e SF |
1759 | case Opt_unix: |
1760 | if (vol->no_linux_ext) | |
1761 | cifs_dbg(VFS, | |
1762 | "conflicting unix mount options\n"); | |
1763 | vol->linux_ext = 1; | |
1764 | break; | |
8830d7e0 | 1765 | case Opt_nocase: |
50c2f753 | 1766 | vol->nocase = 1; |
8830d7e0 SP |
1767 | break; |
1768 | case Opt_brl: | |
c46fa8ac | 1769 | vol->nobrl = 0; |
8830d7e0 SP |
1770 | break; |
1771 | case Opt_nobrl: | |
c46fa8ac | 1772 | vol->nobrl = 1; |
5cfdddcf PS |
1773 | /* |
1774 | * turn off mandatory locking in mode | |
8830d7e0 | 1775 | * if remote locking is turned off since the |
5cfdddcf PS |
1776 | * local vfs will do advisory |
1777 | */ | |
50c2f753 SF |
1778 | if (vol->file_mode == |
1779 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1780 | vol->file_mode = S_IALLUGO; |
8830d7e0 | 1781 | break; |
3d4ef9a1 SF |
1782 | case Opt_nohandlecache: |
1783 | vol->nohandlecache = 1; | |
1784 | break; | |
1785 | case Opt_handlecache: | |
1786 | vol->nohandlecache = 0; | |
1787 | break; | |
8830d7e0 | 1788 | case Opt_forcemandatorylock: |
13a6e42a | 1789 | vol->mand_lock = 1; |
8830d7e0 SP |
1790 | break; |
1791 | case Opt_setuids: | |
1da177e4 | 1792 | vol->setuids = 1; |
8830d7e0 SP |
1793 | break; |
1794 | case Opt_nosetuids: | |
1da177e4 | 1795 | vol->setuids = 0; |
8830d7e0 | 1796 | break; |
95932655 SF |
1797 | case Opt_setuidfromacl: |
1798 | vol->setuidfromacl = 1; | |
1799 | break; | |
8830d7e0 | 1800 | case Opt_dynperm: |
d0a9c078 | 1801 | vol->dynperm = true; |
8830d7e0 SP |
1802 | break; |
1803 | case Opt_nodynperm: | |
d0a9c078 | 1804 | vol->dynperm = false; |
8830d7e0 SP |
1805 | break; |
1806 | case Opt_nohard: | |
1da177e4 | 1807 | vol->retry = 0; |
8830d7e0 SP |
1808 | break; |
1809 | case Opt_nosoft: | |
1da177e4 | 1810 | vol->retry = 1; |
8830d7e0 SP |
1811 | break; |
1812 | case Opt_nointr: | |
1da177e4 | 1813 | vol->intr = 0; |
8830d7e0 SP |
1814 | break; |
1815 | case Opt_intr: | |
1da177e4 | 1816 | vol->intr = 1; |
8830d7e0 SP |
1817 | break; |
1818 | case Opt_nostrictsync: | |
be652445 | 1819 | vol->nostrictsync = 1; |
8830d7e0 SP |
1820 | break; |
1821 | case Opt_strictsync: | |
be652445 | 1822 | vol->nostrictsync = 0; |
8830d7e0 SP |
1823 | break; |
1824 | case Opt_serverino: | |
1da177e4 | 1825 | vol->server_ino = 1; |
8830d7e0 SP |
1826 | break; |
1827 | case Opt_noserverino: | |
1da177e4 | 1828 | vol->server_ino = 0; |
8830d7e0 SP |
1829 | break; |
1830 | case Opt_rwpidforward: | |
d4ffff1f | 1831 | vol->rwpidforward = 1; |
8830d7e0 SP |
1832 | break; |
1833 | case Opt_cifsacl: | |
0a4b92c0 | 1834 | vol->cifs_acl = 1; |
8830d7e0 SP |
1835 | break; |
1836 | case Opt_nocifsacl: | |
0a4b92c0 | 1837 | vol->cifs_acl = 0; |
8830d7e0 SP |
1838 | break; |
1839 | case Opt_acl: | |
1da177e4 | 1840 | vol->no_psx_acl = 0; |
8830d7e0 SP |
1841 | break; |
1842 | case Opt_noacl: | |
1da177e4 | 1843 | vol->no_psx_acl = 1; |
8830d7e0 SP |
1844 | break; |
1845 | case Opt_locallease: | |
84210e91 | 1846 | vol->local_lease = 1; |
8830d7e0 SP |
1847 | break; |
1848 | case Opt_sign: | |
1e3cc57e | 1849 | vol->sign = true; |
8830d7e0 SP |
1850 | break; |
1851 | case Opt_seal: | |
95b1cb90 | 1852 | /* we do not do the following in secFlags because seal |
8830d7e0 SP |
1853 | * is a per tree connection (mount) not a per socket |
1854 | * or per-smb connection option in the protocol | |
1855 | * vol->secFlg |= CIFSSEC_MUST_SEAL; | |
1856 | */ | |
95b1cb90 | 1857 | vol->seal = 1; |
8830d7e0 | 1858 | break; |
8830d7e0 | 1859 | case Opt_noac: |
0b456f04 | 1860 | pr_warn("CIFS: Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n"); |
8830d7e0 SP |
1861 | break; |
1862 | case Opt_fsc: | |
607a569d | 1863 | #ifndef CONFIG_CIFS_FSCACHE |
f96637be | 1864 | cifs_dbg(VFS, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n"); |
b946845a | 1865 | goto cifs_parse_mount_err; |
607a569d | 1866 | #endif |
fa1df75d | 1867 | vol->fsc = true; |
8830d7e0 SP |
1868 | break; |
1869 | case Opt_mfsymlinks: | |
736a3320 | 1870 | vol->mfsymlinks = true; |
8830d7e0 SP |
1871 | break; |
1872 | case Opt_multiuser: | |
0eb8a132 | 1873 | vol->multiuser = true; |
8830d7e0 | 1874 | break; |
d8162558 JL |
1875 | case Opt_sloppy: |
1876 | sloppy = true; | |
1877 | break; | |
a0b3df5c JL |
1878 | case Opt_nosharesock: |
1879 | vol->nosharesock = true; | |
1880 | break; | |
b2a30774 SF |
1881 | case Opt_nopersistent: |
1882 | vol->nopersistent = true; | |
1883 | if (vol->persistent) { | |
1884 | cifs_dbg(VFS, | |
1885 | "persistenthandles mount options conflict\n"); | |
1886 | goto cifs_parse_mount_err; | |
1887 | } | |
1888 | break; | |
1889 | case Opt_persistent: | |
1890 | vol->persistent = true; | |
592fafe6 | 1891 | if ((vol->nopersistent) || (vol->resilient)) { |
b2a30774 SF |
1892 | cifs_dbg(VFS, |
1893 | "persistenthandles mount options conflict\n"); | |
1894 | goto cifs_parse_mount_err; | |
1895 | } | |
1896 | break; | |
592fafe6 SF |
1897 | case Opt_resilient: |
1898 | vol->resilient = true; | |
1899 | if (vol->persistent) { | |
1900 | cifs_dbg(VFS, | |
1901 | "persistenthandles mount options conflict\n"); | |
1902 | goto cifs_parse_mount_err; | |
1903 | } | |
1904 | break; | |
1905 | case Opt_noresilient: | |
1906 | vol->resilient = false; /* already the default */ | |
1907 | break; | |
39566443 GP |
1908 | case Opt_domainauto: |
1909 | vol->domainauto = true; | |
1910 | break; | |
8339dd32 LL |
1911 | case Opt_rdma: |
1912 | vol->rdma = true; | |
1913 | break; | |
8830d7e0 SP |
1914 | |
1915 | /* Numeric Values */ | |
1916 | case Opt_backupuid: | |
3da46565 | 1917 | if (get_option_uid(args, &vol->backupuid)) { |
f96637be JP |
1918 | cifs_dbg(VFS, "%s: Invalid backupuid value\n", |
1919 | __func__); | |
3d3ea8e6 SP |
1920 | goto cifs_parse_mount_err; |
1921 | } | |
1922 | vol->backupuid_specified = true; | |
8830d7e0 SP |
1923 | break; |
1924 | case Opt_backupgid: | |
3da46565 | 1925 | if (get_option_gid(args, &vol->backupgid)) { |
f96637be JP |
1926 | cifs_dbg(VFS, "%s: Invalid backupgid value\n", |
1927 | __func__); | |
3d3ea8e6 SP |
1928 | goto cifs_parse_mount_err; |
1929 | } | |
1930 | vol->backupgid_specified = true; | |
8830d7e0 SP |
1931 | break; |
1932 | case Opt_uid: | |
3da46565 | 1933 | if (get_option_uid(args, &vol->linux_uid)) { |
f96637be JP |
1934 | cifs_dbg(VFS, "%s: Invalid uid value\n", |
1935 | __func__); | |
8830d7e0 SP |
1936 | goto cifs_parse_mount_err; |
1937 | } | |
8830d7e0 SP |
1938 | uid_specified = true; |
1939 | break; | |
1940 | case Opt_cruid: | |
3da46565 | 1941 | if (get_option_uid(args, &vol->cred_uid)) { |
f96637be JP |
1942 | cifs_dbg(VFS, "%s: Invalid cruid value\n", |
1943 | __func__); | |
8830d7e0 SP |
1944 | goto cifs_parse_mount_err; |
1945 | } | |
8830d7e0 SP |
1946 | break; |
1947 | case Opt_gid: | |
3da46565 | 1948 | if (get_option_gid(args, &vol->linux_gid)) { |
f96637be JP |
1949 | cifs_dbg(VFS, "%s: Invalid gid value\n", |
1950 | __func__); | |
8830d7e0 SP |
1951 | goto cifs_parse_mount_err; |
1952 | } | |
8830d7e0 SP |
1953 | gid_specified = true; |
1954 | break; | |
1955 | case Opt_file_mode: | |
1956 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1957 | cifs_dbg(VFS, "%s: Invalid file_mode value\n", |
1958 | __func__); | |
8830d7e0 SP |
1959 | goto cifs_parse_mount_err; |
1960 | } | |
1961 | vol->file_mode = option; | |
1962 | break; | |
1963 | case Opt_dirmode: | |
1964 | if (get_option_ul(args, &option)) { | |
f96637be JP |
1965 | cifs_dbg(VFS, "%s: Invalid dir_mode value\n", |
1966 | __func__); | |
8830d7e0 SP |
1967 | goto cifs_parse_mount_err; |
1968 | } | |
1969 | vol->dir_mode = option; | |
1970 | break; | |
1971 | case Opt_port: | |
b979aaa1 JL |
1972 | if (get_option_ul(args, &option) || |
1973 | option > USHRT_MAX) { | |
f96637be JP |
1974 | cifs_dbg(VFS, "%s: Invalid port value\n", |
1975 | __func__); | |
8830d7e0 SP |
1976 | goto cifs_parse_mount_err; |
1977 | } | |
b979aaa1 | 1978 | port = (unsigned short)option; |
8830d7e0 | 1979 | break; |
e8506d25 SF |
1980 | case Opt_blocksize: |
1981 | if (get_option_ul(args, &option)) { | |
1982 | cifs_dbg(VFS, "%s: Invalid blocksize value\n", | |
1983 | __func__); | |
1984 | goto cifs_parse_mount_err; | |
1985 | } | |
1986 | /* | |
1987 | * inode blocksize realistically should never need to be | |
1988 | * less than 16K or greater than 16M and default is 1MB. | |
1989 | * Note that small inode block sizes (e.g. 64K) can lead | |
1990 | * to very poor performance of common tools like cp and scp | |
1991 | */ | |
1992 | if ((option < CIFS_MAX_MSGSIZE) || | |
1993 | (option > (4 * SMB3_DEFAULT_IOSIZE))) { | |
1994 | cifs_dbg(VFS, "%s: Invalid blocksize\n", | |
1995 | __func__); | |
1996 | goto cifs_parse_mount_err; | |
1997 | } | |
1998 | vol->bsize = option; | |
1999 | break; | |
8830d7e0 SP |
2000 | case Opt_rsize: |
2001 | if (get_option_ul(args, &option)) { | |
f96637be JP |
2002 | cifs_dbg(VFS, "%s: Invalid rsize value\n", |
2003 | __func__); | |
b946845a | 2004 | goto cifs_parse_mount_err; |
8830d7e0 SP |
2005 | } |
2006 | vol->rsize = option; | |
2007 | break; | |
2008 | case Opt_wsize: | |
2009 | if (get_option_ul(args, &option)) { | |
f96637be JP |
2010 | cifs_dbg(VFS, "%s: Invalid wsize value\n", |
2011 | __func__); | |
8830d7e0 SP |
2012 | goto cifs_parse_mount_err; |
2013 | } | |
2014 | vol->wsize = option; | |
2015 | break; | |
2016 | case Opt_actimeo: | |
2017 | if (get_option_ul(args, &option)) { | |
f96637be JP |
2018 | cifs_dbg(VFS, "%s: Invalid actimeo value\n", |
2019 | __func__); | |
8830d7e0 SP |
2020 | goto cifs_parse_mount_err; |
2021 | } | |
2022 | vol->actimeo = HZ * option; | |
2023 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
f96637be | 2024 | cifs_dbg(VFS, "attribute cache timeout too large\n"); |
8830d7e0 SP |
2025 | goto cifs_parse_mount_err; |
2026 | } | |
2027 | break; | |
ca567eb2 SF |
2028 | case Opt_handletimeout: |
2029 | if (get_option_ul(args, &option)) { | |
2030 | cifs_dbg(VFS, "%s: Invalid handletimeout value\n", | |
2031 | __func__); | |
2032 | goto cifs_parse_mount_err; | |
2033 | } | |
2034 | vol->handle_timeout = option; | |
2035 | if (vol->handle_timeout > SMB3_MAX_HANDLE_TIMEOUT) { | |
2036 | cifs_dbg(VFS, "Invalid handle cache timeout, longer than 16 minutes\n"); | |
2037 | goto cifs_parse_mount_err; | |
2038 | } | |
2039 | break; | |
adfeb3e0 SF |
2040 | case Opt_echo_interval: |
2041 | if (get_option_ul(args, &option)) { | |
2042 | cifs_dbg(VFS, "%s: Invalid echo interval value\n", | |
2043 | __func__); | |
2044 | goto cifs_parse_mount_err; | |
2045 | } | |
2046 | vol->echo_interval = option; | |
2047 | break; | |
8b217fe7 SF |
2048 | case Opt_snapshot: |
2049 | if (get_option_ul(args, &option)) { | |
2050 | cifs_dbg(VFS, "%s: Invalid snapshot time\n", | |
2051 | __func__); | |
2052 | goto cifs_parse_mount_err; | |
2053 | } | |
2054 | vol->snapshot_time = option; | |
2055 | break; | |
141891f4 SF |
2056 | case Opt_max_credits: |
2057 | if (get_option_ul(args, &option) || (option < 20) || | |
2058 | (option > 60000)) { | |
2059 | cifs_dbg(VFS, "%s: Invalid max_credits value\n", | |
2060 | __func__); | |
2061 | goto cifs_parse_mount_err; | |
2062 | } | |
2063 | vol->max_credits = option; | |
2064 | break; | |
8830d7e0 SP |
2065 | |
2066 | /* String Arguments */ | |
2067 | ||
4fe9e963 SP |
2068 | case Opt_blank_user: |
2069 | /* null user, ie. anonymous authentication */ | |
2070 | vol->nullauth = 1; | |
2071 | vol->username = NULL; | |
2072 | break; | |
8830d7e0 SP |
2073 | case Opt_user: |
2074 | string = match_strdup(args); | |
2075 | if (string == NULL) | |
2076 | goto out_nomem; | |
2077 | ||
8c3a2b4c SL |
2078 | if (strnlen(string, CIFS_MAX_USERNAME_LEN) > |
2079 | CIFS_MAX_USERNAME_LEN) { | |
0b456f04 | 2080 | pr_warn("CIFS: username too long\n"); |
8830d7e0 SP |
2081 | goto cifs_parse_mount_err; |
2082 | } | |
2bd50fb3 TK |
2083 | |
2084 | kfree(vol->username); | |
8830d7e0 | 2085 | vol->username = kstrdup(string, GFP_KERNEL); |
f96637be | 2086 | if (!vol->username) |
8830d7e0 | 2087 | goto cifs_parse_mount_err; |
8830d7e0 SP |
2088 | break; |
2089 | case Opt_blank_pass: | |
8830d7e0 SP |
2090 | /* passwords have to be handled differently |
2091 | * to allow the character used for deliminator | |
2092 | * to be passed within them | |
2093 | */ | |
2094 | ||
c369c9a4 SP |
2095 | /* |
2096 | * Check if this is a case where the password | |
2097 | * starts with a delimiter | |
2098 | */ | |
2099 | tmp_end = strchr(data, '='); | |
2100 | tmp_end++; | |
2101 | if (!(tmp_end < end && tmp_end[1] == delim)) { | |
2102 | /* No it is not. Set the password to NULL */ | |
97f4b727 | 2103 | kzfree(vol->password); |
c369c9a4 SP |
2104 | vol->password = NULL; |
2105 | break; | |
2106 | } | |
07fa6010 | 2107 | /* Fallthrough - to Opt_pass below.*/ |
c369c9a4 | 2108 | case Opt_pass: |
8830d7e0 SP |
2109 | /* Obtain the value string */ |
2110 | value = strchr(data, '='); | |
10238074 | 2111 | value++; |
8830d7e0 SP |
2112 | |
2113 | /* Set tmp_end to end of the string */ | |
2114 | tmp_end = (char *) value + strlen(value); | |
2115 | ||
2116 | /* Check if following character is the deliminator | |
2117 | * If yes, we have encountered a double deliminator | |
2118 | * reset the NULL character to the deliminator | |
2119 | */ | |
e73f843a | 2120 | if (tmp_end < end && tmp_end[1] == delim) { |
8830d7e0 SP |
2121 | tmp_end[0] = delim; |
2122 | ||
e73f843a SJ |
2123 | /* Keep iterating until we get to a single |
2124 | * deliminator OR the end | |
2125 | */ | |
2126 | while ((tmp_end = strchr(tmp_end, delim)) | |
2127 | != NULL && (tmp_end[1] == delim)) { | |
2128 | tmp_end = (char *) &tmp_end[2]; | |
2129 | } | |
2130 | ||
2131 | /* Reset var options to point to next element */ | |
2132 | if (tmp_end) { | |
2133 | tmp_end[0] = '\0'; | |
2134 | options = (char *) &tmp_end[1]; | |
2135 | } else | |
2136 | /* Reached the end of the mount option | |
2137 | * string */ | |
2138 | options = end; | |
8830d7e0 SP |
2139 | } |
2140 | ||
97f4b727 | 2141 | kzfree(vol->password); |
8830d7e0 SP |
2142 | /* Now build new password string */ |
2143 | temp_len = strlen(value); | |
2144 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); | |
2145 | if (vol->password == NULL) { | |
0b456f04 | 2146 | pr_warn("CIFS: no memory for password\n"); |
8830d7e0 SP |
2147 | goto cifs_parse_mount_err; |
2148 | } | |
2149 | ||
2150 | for (i = 0, j = 0; i < temp_len; i++, j++) { | |
2151 | vol->password[j] = value[i]; | |
2152 | if ((value[i] == delim) && | |
2153 | value[i+1] == delim) | |
2154 | /* skip the second deliminator */ | |
2155 | i++; | |
2156 | } | |
2157 | vol->password[j] = '\0'; | |
2158 | break; | |
4fe9e963 | 2159 | case Opt_blank_ip: |
b979aaa1 JL |
2160 | /* FIXME: should this be an error instead? */ |
2161 | got_ip = false; | |
4fe9e963 | 2162 | break; |
8830d7e0 SP |
2163 | case Opt_ip: |
2164 | string = match_strdup(args); | |
2165 | if (string == NULL) | |
2166 | goto out_nomem; | |
2167 | ||
b979aaa1 JL |
2168 | if (!cifs_convert_address(dstaddr, string, |
2169 | strlen(string))) { | |
0b456f04 | 2170 | pr_err("CIFS: bad ip= option (%s).\n", string); |
8830d7e0 SP |
2171 | goto cifs_parse_mount_err; |
2172 | } | |
b979aaa1 | 2173 | got_ip = true; |
8830d7e0 | 2174 | break; |
8830d7e0 SP |
2175 | case Opt_domain: |
2176 | string = match_strdup(args); | |
2177 | if (string == NULL) | |
2178 | goto out_nomem; | |
2179 | ||
057d6332 CG |
2180 | if (strnlen(string, CIFS_MAX_DOMAINNAME_LEN) |
2181 | == CIFS_MAX_DOMAINNAME_LEN) { | |
0b456f04 | 2182 | pr_warn("CIFS: domain name too long\n"); |
8830d7e0 SP |
2183 | goto cifs_parse_mount_err; |
2184 | } | |
2185 | ||
2bd50fb3 | 2186 | kfree(vol->domainname); |
8830d7e0 SP |
2187 | vol->domainname = kstrdup(string, GFP_KERNEL); |
2188 | if (!vol->domainname) { | |
0b456f04 | 2189 | pr_warn("CIFS: no memory for domainname\n"); |
8830d7e0 SP |
2190 | goto cifs_parse_mount_err; |
2191 | } | |
f96637be | 2192 | cifs_dbg(FYI, "Domain name set\n"); |
8830d7e0 SP |
2193 | break; |
2194 | case Opt_srcaddr: | |
2195 | string = match_strdup(args); | |
2196 | if (string == NULL) | |
2197 | goto out_nomem; | |
2198 | ||
4fe9e963 | 2199 | if (!cifs_convert_address( |
8830d7e0 SP |
2200 | (struct sockaddr *)&vol->srcaddr, |
2201 | string, strlen(string))) { | |
0b456f04 AS |
2202 | pr_warn("CIFS: Could not parse srcaddr: %s\n", |
2203 | string); | |
8830d7e0 SP |
2204 | goto cifs_parse_mount_err; |
2205 | } | |
2206 | break; | |
8830d7e0 SP |
2207 | case Opt_iocharset: |
2208 | string = match_strdup(args); | |
2209 | if (string == NULL) | |
2210 | goto out_nomem; | |
2211 | ||
4fe9e963 | 2212 | if (strnlen(string, 1024) >= 65) { |
0b456f04 | 2213 | pr_warn("CIFS: iocharset name too long.\n"); |
8830d7e0 SP |
2214 | goto cifs_parse_mount_err; |
2215 | } | |
2216 | ||
87e747cd | 2217 | if (strncasecmp(string, "default", 7) != 0) { |
2bd50fb3 | 2218 | kfree(vol->iocharset); |
8830d7e0 SP |
2219 | vol->iocharset = kstrdup(string, |
2220 | GFP_KERNEL); | |
2221 | if (!vol->iocharset) { | |
0b456f04 | 2222 | pr_warn("CIFS: no memory for charset\n"); |
8830d7e0 SP |
2223 | goto cifs_parse_mount_err; |
2224 | } | |
2225 | } | |
2226 | /* if iocharset not set then load_nls_default | |
2227 | * is used by caller | |
2228 | */ | |
f96637be | 2229 | cifs_dbg(FYI, "iocharset set to %s\n", string); |
8830d7e0 | 2230 | break; |
8830d7e0 SP |
2231 | case Opt_netbiosname: |
2232 | string = match_strdup(args); | |
2233 | if (string == NULL) | |
2234 | goto out_nomem; | |
2235 | ||
8830d7e0 SP |
2236 | memset(vol->source_rfc1001_name, 0x20, |
2237 | RFC1001_NAME_LEN); | |
2238 | /* | |
2239 | * FIXME: are there cases in which a comma can | |
2240 | * be valid in workstation netbios name (and | |
2241 | * need special handling)? | |
2242 | */ | |
2243 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
2244 | /* don't ucase netbiosname for user */ | |
2245 | if (string[i] == 0) | |
2246 | break; | |
2247 | vol->source_rfc1001_name[i] = string[i]; | |
2248 | } | |
2249 | /* The string has 16th byte zero still from | |
2250 | * set at top of the function | |
2251 | */ | |
2252 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
0b456f04 | 2253 | pr_warn("CIFS: netbiosname longer than 15 truncated.\n"); |
8830d7e0 SP |
2254 | break; |
2255 | case Opt_servern: | |
2256 | /* servernetbiosname specified override *SMBSERVER */ | |
2257 | string = match_strdup(args); | |
2258 | if (string == NULL) | |
2259 | goto out_nomem; | |
2260 | ||
8830d7e0 SP |
2261 | /* last byte, type, is 0x20 for servr type */ |
2262 | memset(vol->target_rfc1001_name, 0x20, | |
2263 | RFC1001_NAME_LEN_WITH_NULL); | |
2264 | ||
2265 | /* BB are there cases in which a comma can be | |
2266 | valid in this workstation netbios name | |
2267 | (and need special handling)? */ | |
2268 | ||
2269 | /* user or mount helper must uppercase the | |
2270 | netbios name */ | |
2271 | for (i = 0; i < 15; i++) { | |
2272 | if (string[i] == 0) | |
2273 | break; | |
2274 | vol->target_rfc1001_name[i] = string[i]; | |
2275 | } | |
2276 | /* The string has 16th byte zero still from | |
2277 | set at top of the function */ | |
2278 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
0b456f04 | 2279 | pr_warn("CIFS: server netbiosname longer than 15 truncated.\n"); |
8830d7e0 SP |
2280 | break; |
2281 | case Opt_ver: | |
7e682f76 | 2282 | /* version of mount userspace tools, not dialect */ |
8830d7e0 SP |
2283 | string = match_strdup(args); |
2284 | if (string == NULL) | |
2285 | goto out_nomem; | |
2286 | ||
7e682f76 | 2287 | /* If interface changes in mount.cifs bump to new ver */ |
87e747cd | 2288 | if (strncasecmp(string, "1", 1) == 0) { |
7e682f76 SF |
2289 | if (strlen(string) > 1) { |
2290 | pr_warn("Bad mount helper ver=%s. Did " | |
2291 | "you want SMB1 (CIFS) dialect " | |
2292 | "and mean to type vers=1.0 " | |
2293 | "instead?\n", string); | |
2294 | goto cifs_parse_mount_err; | |
2295 | } | |
8830d7e0 SP |
2296 | /* This is the default */ |
2297 | break; | |
2298 | } | |
2299 | /* For all other value, error */ | |
7e682f76 | 2300 | pr_warn("CIFS: Invalid mount helper version specified\n"); |
b946845a | 2301 | goto cifs_parse_mount_err; |
23db65f5 | 2302 | case Opt_vers: |
7e682f76 | 2303 | /* protocol version (dialect) */ |
23db65f5 JL |
2304 | string = match_strdup(args); |
2305 | if (string == NULL) | |
2306 | goto out_nomem; | |
2307 | ||
c7c137b9 | 2308 | if (cifs_parse_smb_version(string, vol, is_smb3) != 0) |
23db65f5 | 2309 | goto cifs_parse_mount_err; |
7e682f76 | 2310 | got_version = true; |
23db65f5 | 2311 | break; |
8830d7e0 SP |
2312 | case Opt_sec: |
2313 | string = match_strdup(args); | |
2314 | if (string == NULL) | |
2315 | goto out_nomem; | |
2316 | ||
8830d7e0 SP |
2317 | if (cifs_parse_security_flavors(string, vol) != 0) |
2318 | goto cifs_parse_mount_err; | |
2319 | break; | |
15b6a473 JL |
2320 | case Opt_cache: |
2321 | string = match_strdup(args); | |
2322 | if (string == NULL) | |
2323 | goto out_nomem; | |
2324 | ||
2325 | if (cifs_parse_cache_flavor(string, vol) != 0) | |
2326 | goto cifs_parse_mount_err; | |
2327 | break; | |
8830d7e0 | 2328 | default: |
d8162558 JL |
2329 | /* |
2330 | * An option we don't recognize. Save it off for later | |
2331 | * if we haven't already found one | |
2332 | */ | |
2333 | if (!invalid) | |
2334 | invalid = data; | |
8830d7e0 | 2335 | break; |
1da177e4 | 2336 | } |
8830d7e0 SP |
2337 | /* Free up any allocated string */ |
2338 | kfree(string); | |
2339 | string = NULL; | |
1da177e4 | 2340 | } |
0eb8a132 | 2341 | |
d8162558 | 2342 | if (!sloppy && invalid) { |
0b456f04 | 2343 | pr_err("CIFS: Unknown mount option \"%s\"\n", invalid); |
d8162558 JL |
2344 | goto cifs_parse_mount_err; |
2345 | } | |
2346 | ||
8339dd32 LL |
2347 | if (vol->rdma && vol->vals->protocol_id < SMB30_PROT_ID) { |
2348 | cifs_dbg(VFS, "SMB Direct requires Version >=3.0\n"); | |
2349 | goto cifs_parse_mount_err; | |
2350 | } | |
2351 | ||
8a8798a5 JL |
2352 | #ifndef CONFIG_KEYS |
2353 | /* Muliuser mounts require CONFIG_KEYS support */ | |
2354 | if (vol->multiuser) { | |
f96637be | 2355 | cifs_dbg(VFS, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n"); |
b946845a | 2356 | goto cifs_parse_mount_err; |
0eb8a132 | 2357 | } |
8a8798a5 | 2358 | #endif |
e5e69abd | 2359 | if (!vol->UNC) { |
37d4f99b | 2360 | cifs_dbg(VFS, "CIFS mount error: No usable UNC path provided in device string!\n"); |
e5e69abd JL |
2361 | goto cifs_parse_mount_err; |
2362 | } | |
0eb8a132 | 2363 | |
62a1a439 JL |
2364 | /* make sure UNC has a share name */ |
2365 | if (!strchr(vol->UNC + 3, '\\')) { | |
f96637be | 2366 | cifs_dbg(VFS, "Malformed UNC. Unable to find share name.\n"); |
62a1a439 JL |
2367 | goto cifs_parse_mount_err; |
2368 | } | |
2369 | ||
b979aaa1 | 2370 | if (!got_ip) { |
29bb3158 DP |
2371 | int len; |
2372 | const char *slash; | |
2373 | ||
b979aaa1 | 2374 | /* No ip= option specified? Try to get it from UNC */ |
29bb3158 DP |
2375 | /* Use the address part of the UNC. */ |
2376 | slash = strchr(&vol->UNC[2], '\\'); | |
2377 | len = slash - &vol->UNC[2]; | |
2378 | if (!cifs_convert_address(dstaddr, &vol->UNC[2], len)) { | |
0b456f04 | 2379 | pr_err("Unable to determine destination address.\n"); |
b979aaa1 JL |
2380 | goto cifs_parse_mount_err; |
2381 | } | |
2382 | } | |
2383 | ||
2384 | /* set the port that we got earlier */ | |
2385 | cifs_set_port(dstaddr, port); | |
1da177e4 | 2386 | |
9b9d6b24 JL |
2387 | if (uid_specified) |
2388 | vol->override_uid = override_uid; | |
2389 | else if (override_uid == 1) | |
0b456f04 | 2390 | pr_notice("CIFS: ignoring forceuid mount option specified with no uid= option.\n"); |
9b9d6b24 JL |
2391 | |
2392 | if (gid_specified) | |
2393 | vol->override_gid = override_gid; | |
2394 | else if (override_gid == 1) | |
0b456f04 | 2395 | pr_notice("CIFS: ignoring forcegid mount option specified with no gid= option.\n"); |
9b9d6b24 | 2396 | |
7e682f76 SF |
2397 | if (got_version == false) |
2398 | pr_warn("No dialect specified on mount. Default has changed to " | |
9764c02f | 2399 | "a more secure dialect, SMB2.1 or later (e.g. SMB3), from CIFS " |
7e682f76 | 2400 | "(SMB1). To use the less secure SMB1 dialect to access " |
9764c02f SF |
2401 | "old servers which do not support SMB3 (or SMB2.1) specify vers=1.0" |
2402 | " on mount.\n"); | |
7e682f76 | 2403 | |
b946845a | 2404 | kfree(mountdata_copy); |
1da177e4 | 2405 | return 0; |
b946845a | 2406 | |
8830d7e0 | 2407 | out_nomem: |
0b456f04 | 2408 | pr_warn("Could not allocate temporary buffer\n"); |
b946845a | 2409 | cifs_parse_mount_err: |
8830d7e0 | 2410 | kfree(string); |
b946845a SF |
2411 | kfree(mountdata_copy); |
2412 | return 1; | |
1da177e4 LT |
2413 | } |
2414 | ||
3eb9a889 BG |
2415 | /** Returns true if srcaddr isn't specified and rhs isn't |
2416 | * specified, or if srcaddr is specified and | |
2417 | * matches the IP address of the rhs argument. | |
2418 | */ | |
2419 | static bool | |
2420 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
2421 | { | |
2422 | switch (srcaddr->sa_family) { | |
2423 | case AF_UNSPEC: | |
2424 | return (rhs->sa_family == AF_UNSPEC); | |
2425 | case AF_INET: { | |
2426 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
2427 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
2428 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
2429 | } | |
2430 | case AF_INET6: { | |
2431 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
e3e2775c | 2432 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs; |
3eb9a889 BG |
2433 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); |
2434 | } | |
2435 | default: | |
2436 | WARN_ON(1); | |
2437 | return false; /* don't expect to be here */ | |
2438 | } | |
2439 | } | |
2440 | ||
4b886136 PS |
2441 | /* |
2442 | * If no port is specified in addr structure, we try to match with 445 port | |
2443 | * and if it fails - with 139 ports. It should be called only if address | |
2444 | * families of server and addr are equal. | |
2445 | */ | |
2446 | static bool | |
2447 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
2448 | { | |
6da97910 | 2449 | __be16 port, *sport; |
4b886136 | 2450 | |
3b249115 LL |
2451 | /* SMBDirect manages its own ports, don't match it here */ |
2452 | if (server->rdma) | |
2453 | return true; | |
2454 | ||
4b886136 PS |
2455 | switch (addr->sa_family) { |
2456 | case AF_INET: | |
2457 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
2458 | port = ((struct sockaddr_in *) addr)->sin_port; | |
2459 | break; | |
2460 | case AF_INET6: | |
2461 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
2462 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
2463 | break; | |
2464 | default: | |
2465 | WARN_ON(1); | |
2466 | return false; | |
2467 | } | |
2468 | ||
2469 | if (!port) { | |
2470 | port = htons(CIFS_PORT); | |
2471 | if (port == *sport) | |
2472 | return true; | |
2473 | ||
2474 | port = htons(RFC1001_PORT); | |
2475 | } | |
2476 | ||
2477 | return port == *sport; | |
2478 | } | |
3eb9a889 | 2479 | |
4515148e | 2480 | static bool |
3eb9a889 BG |
2481 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
2482 | struct sockaddr *srcaddr) | |
4515148e | 2483 | { |
4515148e | 2484 | switch (addr->sa_family) { |
a9f1b85e PS |
2485 | case AF_INET: { |
2486 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
2487 | struct sockaddr_in *srv_addr4 = | |
2488 | (struct sockaddr_in *)&server->dstaddr; | |
2489 | ||
2490 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 2491 | return false; |
4515148e | 2492 | break; |
a9f1b85e PS |
2493 | } |
2494 | case AF_INET6: { | |
2495 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
2496 | struct sockaddr_in6 *srv_addr6 = | |
2497 | (struct sockaddr_in6 *)&server->dstaddr; | |
2498 | ||
4515148e | 2499 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 2500 | &srv_addr6->sin6_addr)) |
4515148e | 2501 | return false; |
a9f1b85e | 2502 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 2503 | return false; |
4515148e JL |
2504 | break; |
2505 | } | |
a9f1b85e PS |
2506 | default: |
2507 | WARN_ON(1); | |
2508 | return false; /* don't expect to be here */ | |
2509 | } | |
4515148e | 2510 | |
3eb9a889 BG |
2511 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
2512 | return false; | |
2513 | ||
4515148e JL |
2514 | return true; |
2515 | } | |
2516 | ||
daf5b0b6 JL |
2517 | static bool |
2518 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
2519 | { | |
3f618223 JL |
2520 | /* |
2521 | * The select_sectype function should either return the vol->sectype | |
2522 | * that was specified, or "Unspecified" if that sectype was not | |
2523 | * compatible with the given NEGOTIATE request. | |
2524 | */ | |
ef65aaed SP |
2525 | if (server->ops->select_sectype(server, vol->sectype) |
2526 | == Unspecified) | |
daf5b0b6 | 2527 | return false; |
daf5b0b6 | 2528 | |
3f618223 JL |
2529 | /* |
2530 | * Now check if signing mode is acceptable. No need to check | |
2531 | * global_secflags at this point since if MUST_SIGN is set then | |
2532 | * the server->sign had better be too. | |
2533 | */ | |
38d77c50 JL |
2534 | if (vol->sign && !server->sign) |
2535 | return false; | |
daf5b0b6 JL |
2536 | |
2537 | return true; | |
2538 | } | |
2539 | ||
9fa114f7 | 2540 | static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol) |
37bb04e5 | 2541 | { |
9fa114f7 JL |
2542 | struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr; |
2543 | ||
a0b3df5c JL |
2544 | if (vol->nosharesock) |
2545 | return 0; | |
2546 | ||
9764c02f | 2547 | /* BB update this for smb3any and default case */ |
23db65f5 JL |
2548 | if ((server->vals != vol->vals) || (server->ops != vol->ops)) |
2549 | return 0; | |
2550 | ||
37bb04e5 PS |
2551 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) |
2552 | return 0; | |
2553 | ||
2554 | if (!match_address(server, addr, | |
2555 | (struct sockaddr *)&vol->srcaddr)) | |
2556 | return 0; | |
2557 | ||
2558 | if (!match_port(server, addr)) | |
2559 | return 0; | |
2560 | ||
2561 | if (!match_security(server, vol)) | |
2562 | return 0; | |
2563 | ||
b782fcc1 | 2564 | if (server->echo_interval != vol->echo_interval * HZ) |
adfeb3e0 SF |
2565 | return 0; |
2566 | ||
8339dd32 LL |
2567 | if (server->rdma != vol->rdma) |
2568 | return 0; | |
2569 | ||
37bb04e5 PS |
2570 | return 1; |
2571 | } | |
2572 | ||
54be1f6c | 2573 | struct TCP_Server_Info * |
9fa114f7 | 2574 | cifs_find_tcp_session(struct smb_vol *vol) |
1da177e4 | 2575 | { |
e7ddee90 | 2576 | struct TCP_Server_Info *server; |
e7ddee90 | 2577 | |
3f9bcca7 | 2578 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 2579 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
9fa114f7 | 2580 | if (!match_server(server, vol)) |
daf5b0b6 JL |
2581 | continue; |
2582 | ||
e7ddee90 | 2583 | ++server->srv_count; |
3f9bcca7 | 2584 | spin_unlock(&cifs_tcp_ses_lock); |
f96637be | 2585 | cifs_dbg(FYI, "Existing tcp session with server found\n"); |
e7ddee90 | 2586 | return server; |
1da177e4 | 2587 | } |
3f9bcca7 | 2588 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2589 | return NULL; |
2590 | } | |
1b20d672 | 2591 | |
53e0e11e PS |
2592 | void |
2593 | cifs_put_tcp_session(struct TCP_Server_Info *server, int from_reconnect) | |
1da177e4 | 2594 | { |
a5c3e1c7 SF |
2595 | struct task_struct *task; |
2596 | ||
3f9bcca7 | 2597 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 2598 | if (--server->srv_count > 0) { |
3f9bcca7 | 2599 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 2600 | return; |
1da177e4 | 2601 | } |
1b20d672 | 2602 | |
f1d0c998 RL |
2603 | put_net(cifs_net_ns(server)); |
2604 | ||
e7ddee90 | 2605 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 2606 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2607 | |
c74093b6 JL |
2608 | cancel_delayed_work_sync(&server->echo); |
2609 | ||
53e0e11e PS |
2610 | if (from_reconnect) |
2611 | /* | |
2612 | * Avoid deadlock here: reconnect work calls | |
2613 | * cifs_put_tcp_session() at its end. Need to be sure | |
2614 | * that reconnect work does nothing with server pointer after | |
2615 | * that step. | |
2616 | */ | |
2617 | cancel_delayed_work(&server->reconnect); | |
2618 | else | |
2619 | cancel_delayed_work_sync(&server->reconnect); | |
53e0e11e | 2620 | |
e7ddee90 JL |
2621 | spin_lock(&GlobalMid_Lock); |
2622 | server->tcpStatus = CifsExiting; | |
2623 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 2624 | |
026e93dc | 2625 | cifs_crypto_secmech_release(server); |
488f1d2d SJ |
2626 | cifs_fscache_release_client_cookie(server); |
2627 | ||
21e73393 SP |
2628 | kfree(server->session_key.response); |
2629 | server->session_key.response = NULL; | |
2630 | server->session_key.len = 0; | |
a5c3e1c7 SF |
2631 | |
2632 | task = xchg(&server->tsk, NULL); | |
2633 | if (task) | |
2634 | force_sig(SIGKILL, task); | |
1da177e4 LT |
2635 | } |
2636 | ||
63c038c2 JL |
2637 | static struct TCP_Server_Info * |
2638 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
2639 | { | |
2640 | struct TCP_Server_Info *tcp_ses = NULL; | |
63c038c2 JL |
2641 | int rc; |
2642 | ||
f96637be | 2643 | cifs_dbg(FYI, "UNC: %s\n", volume_info->UNC); |
63c038c2 JL |
2644 | |
2645 | /* see if we already have a matching tcp_ses */ | |
9fa114f7 | 2646 | tcp_ses = cifs_find_tcp_session(volume_info); |
63c038c2 JL |
2647 | if (tcp_ses) |
2648 | return tcp_ses; | |
2649 | ||
2650 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
2651 | if (!tcp_ses) { | |
2652 | rc = -ENOMEM; | |
2653 | goto out_err; | |
2654 | } | |
2655 | ||
23db65f5 JL |
2656 | tcp_ses->ops = volume_info->ops; |
2657 | tcp_ses->vals = volume_info->vals; | |
f1d0c998 | 2658 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
2659 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
2660 | if (IS_ERR(tcp_ses->hostname)) { | |
2661 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 2662 | goto out_err_crypto_release; |
63c038c2 JL |
2663 | } |
2664 | ||
2665 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
2666 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 2667 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
8339dd32 | 2668 | tcp_ses->rdma = volume_info->rdma; |
fc40f9cf | 2669 | tcp_ses->in_flight = 0; |
2d86dbc9 | 2670 | tcp_ses->credits = 1; |
63c038c2 JL |
2671 | init_waitqueue_head(&tcp_ses->response_q); |
2672 | init_waitqueue_head(&tcp_ses->request_q); | |
2673 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
2674 | mutex_init(&tcp_ses->srv_mutex); | |
2675 | memcpy(tcp_ses->workstation_RFC1001_name, | |
2676 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
2677 | memcpy(tcp_ses->server_RFC1001_name, | |
2678 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 2679 | tcp_ses->session_estab = false; |
63c038c2 | 2680 | tcp_ses->sequence_number = 0; |
5b964852 | 2681 | tcp_ses->reconnect_instance = 1; |
fda35943 | 2682 | tcp_ses->lstrp = jiffies; |
58fa015f | 2683 | spin_lock_init(&tcp_ses->req_lock); |
63c038c2 JL |
2684 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
2685 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 2686 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
53e0e11e PS |
2687 | INIT_DELAYED_WORK(&tcp_ses->reconnect, smb2_reconnect_server); |
2688 | mutex_init(&tcp_ses->reconnect_mutex); | |
9fa114f7 JL |
2689 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
2690 | sizeof(tcp_ses->srcaddr)); | |
2691 | memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr, | |
2692 | sizeof(tcp_ses->dstaddr)); | |
fa70b87c | 2693 | generate_random_uuid(tcp_ses->client_guid); |
63c038c2 JL |
2694 | /* |
2695 | * at this point we are the only ones with the pointer | |
2696 | * to the struct since the kernel thread not created yet | |
2697 | * no need to spinlock this init of tcpStatus or srv_count | |
2698 | */ | |
2699 | tcp_ses->tcpStatus = CifsNew; | |
2700 | ++tcp_ses->srv_count; | |
2701 | ||
adfeb3e0 SF |
2702 | if (volume_info->echo_interval >= SMB_ECHO_INTERVAL_MIN && |
2703 | volume_info->echo_interval <= SMB_ECHO_INTERVAL_MAX) | |
2704 | tcp_ses->echo_interval = volume_info->echo_interval * HZ; | |
2705 | else | |
2706 | tcp_ses->echo_interval = SMB_ECHO_INTERVAL_DEFAULT * HZ; | |
2f894646 LL |
2707 | if (tcp_ses->rdma) { |
2708 | #ifndef CONFIG_CIFS_SMB_DIRECT | |
2709 | cifs_dbg(VFS, "CONFIG_CIFS_SMB_DIRECT is not enabled\n"); | |
2710 | rc = -ENOENT; | |
2711 | goto out_err_crypto_release; | |
2712 | #endif | |
2713 | tcp_ses->smbd_conn = smbd_get_connection( | |
2714 | tcp_ses, (struct sockaddr *)&volume_info->dstaddr); | |
2715 | if (tcp_ses->smbd_conn) { | |
2716 | cifs_dbg(VFS, "RDMA transport established\n"); | |
2717 | rc = 0; | |
2718 | goto smbd_connected; | |
2719 | } else { | |
2720 | rc = -ENOENT; | |
2721 | goto out_err_crypto_release; | |
2722 | } | |
2723 | } | |
a9f1b85e | 2724 | rc = ip_connect(tcp_ses); |
63c038c2 | 2725 | if (rc < 0) { |
f96637be | 2726 | cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n"); |
f7c5445a | 2727 | goto out_err_crypto_release; |
63c038c2 | 2728 | } |
2f894646 | 2729 | smbd_connected: |
63c038c2 JL |
2730 | /* |
2731 | * since we're in a cifs function already, we know that | |
2732 | * this will succeed. No need for try_module_get(). | |
2733 | */ | |
2734 | __module_get(THIS_MODULE); | |
7c97c200 | 2735 | tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, |
63c038c2 JL |
2736 | tcp_ses, "cifsd"); |
2737 | if (IS_ERR(tcp_ses->tsk)) { | |
2738 | rc = PTR_ERR(tcp_ses->tsk); | |
f96637be | 2739 | cifs_dbg(VFS, "error %d create cifsd thread\n", rc); |
63c038c2 | 2740 | module_put(THIS_MODULE); |
f7c5445a | 2741 | goto out_err_crypto_release; |
63c038c2 | 2742 | } |
fd88ce93 | 2743 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
63c038c2 | 2744 | |
93d5cb51 PA |
2745 | tcp_ses->nr_targets = 1; |
2746 | ||
63c038c2 | 2747 | /* thread spawned, put it on the list */ |
3f9bcca7 | 2748 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 2749 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 2750 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 2751 | |
488f1d2d SJ |
2752 | cifs_fscache_get_client_cookie(tcp_ses); |
2753 | ||
c74093b6 | 2754 | /* queue echo request delayed work */ |
adfeb3e0 | 2755 | queue_delayed_work(cifsiod_wq, &tcp_ses->echo, tcp_ses->echo_interval); |
c74093b6 | 2756 | |
63c038c2 JL |
2757 | return tcp_ses; |
2758 | ||
f7c5445a | 2759 | out_err_crypto_release: |
026e93dc | 2760 | cifs_crypto_secmech_release(tcp_ses); |
d2b91521 | 2761 | |
f1d0c998 RL |
2762 | put_net(cifs_net_ns(tcp_ses)); |
2763 | ||
63c038c2 JL |
2764 | out_err: |
2765 | if (tcp_ses) { | |
8347a5cd SF |
2766 | if (!IS_ERR(tcp_ses->hostname)) |
2767 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
2768 | if (tcp_ses->ssocket) |
2769 | sock_release(tcp_ses->ssocket); | |
2770 | kfree(tcp_ses); | |
2771 | } | |
2772 | return ERR_PTR(rc); | |
2773 | } | |
2774 | ||
96daf2b0 | 2775 | static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
37bb04e5 | 2776 | { |
3f618223 JL |
2777 | if (vol->sectype != Unspecified && |
2778 | vol->sectype != ses->sectype) | |
2779 | return 0; | |
2780 | ||
2781 | switch (ses->sectype) { | |
37bb04e5 | 2782 | case Kerberos: |
64ed39dd | 2783 | if (!uid_eq(vol->cred_uid, ses->cred_uid)) |
37bb04e5 PS |
2784 | return 0; |
2785 | break; | |
2786 | default: | |
04febabc JL |
2787 | /* NULL username means anonymous session */ |
2788 | if (ses->user_name == NULL) { | |
2789 | if (!vol->nullauth) | |
2790 | return 0; | |
2791 | break; | |
2792 | } | |
2793 | ||
37bb04e5 | 2794 | /* anything else takes username/password */ |
04febabc JL |
2795 | if (strncmp(ses->user_name, |
2796 | vol->username ? vol->username : "", | |
8c3a2b4c | 2797 | CIFS_MAX_USERNAME_LEN)) |
37bb04e5 | 2798 | return 0; |
08b37d51 | 2799 | if ((vol->username && strlen(vol->username) != 0) && |
37bb04e5 PS |
2800 | ses->password != NULL && |
2801 | strncmp(ses->password, | |
2802 | vol->password ? vol->password : "", | |
8c3a2b4c | 2803 | CIFS_MAX_PASSWORD_LEN)) |
37bb04e5 PS |
2804 | return 0; |
2805 | } | |
2806 | return 1; | |
2807 | } | |
2808 | ||
b327a717 AA |
2809 | /** |
2810 | * cifs_setup_ipc - helper to setup the IPC tcon for the session | |
2811 | * | |
2812 | * A new IPC connection is made and stored in the session | |
2813 | * tcon_ipc. The IPC tcon has the same lifetime as the session. | |
2814 | */ | |
2815 | static int | |
2816 | cifs_setup_ipc(struct cifs_ses *ses, struct smb_vol *volume_info) | |
2817 | { | |
2818 | int rc = 0, xid; | |
2819 | struct cifs_tcon *tcon; | |
2820 | struct nls_table *nls_codepage; | |
2821 | char unc[SERVER_NAME_LENGTH + sizeof("//x/IPC$")] = {0}; | |
2822 | bool seal = false; | |
2823 | ||
2824 | /* | |
2825 | * If the mount request that resulted in the creation of the | |
2826 | * session requires encryption, force IPC to be encrypted too. | |
2827 | */ | |
2828 | if (volume_info->seal) { | |
2829 | if (ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) | |
2830 | seal = true; | |
2831 | else { | |
2832 | cifs_dbg(VFS, | |
2833 | "IPC: server doesn't support encryption\n"); | |
2834 | return -EOPNOTSUPP; | |
2835 | } | |
2836 | } | |
2837 | ||
2838 | tcon = tconInfoAlloc(); | |
2839 | if (tcon == NULL) | |
2840 | return -ENOMEM; | |
2841 | ||
74ea5f98 | 2842 | scnprintf(unc, sizeof(unc), "\\\\%s\\IPC$", ses->server->hostname); |
b327a717 AA |
2843 | |
2844 | /* cannot fail */ | |
2845 | nls_codepage = load_nls_default(); | |
2846 | ||
2847 | xid = get_xid(); | |
2848 | tcon->ses = ses; | |
2849 | tcon->ipc = true; | |
2850 | tcon->seal = seal; | |
2851 | rc = ses->server->ops->tree_connect(xid, ses, unc, tcon, nls_codepage); | |
2852 | free_xid(xid); | |
2853 | ||
2854 | if (rc) { | |
2855 | cifs_dbg(VFS, "failed to connect to IPC (rc=%d)\n", rc); | |
2856 | tconInfoFree(tcon); | |
2857 | goto out; | |
2858 | } | |
2859 | ||
2860 | cifs_dbg(FYI, "IPC tcon rc = %d ipc tid = %d\n", rc, tcon->tid); | |
2861 | ||
2862 | ses->tcon_ipc = tcon; | |
2863 | out: | |
2864 | unload_nls(nls_codepage); | |
2865 | return rc; | |
2866 | } | |
2867 | ||
2868 | /** | |
2869 | * cifs_free_ipc - helper to release the session IPC tcon | |
2870 | * | |
2871 | * Needs to be called everytime a session is destroyed | |
2872 | */ | |
2873 | static int | |
2874 | cifs_free_ipc(struct cifs_ses *ses) | |
2875 | { | |
2876 | int rc = 0, xid; | |
2877 | struct cifs_tcon *tcon = ses->tcon_ipc; | |
2878 | ||
2879 | if (tcon == NULL) | |
2880 | return 0; | |
2881 | ||
2882 | if (ses->server->ops->tree_disconnect) { | |
2883 | xid = get_xid(); | |
2884 | rc = ses->server->ops->tree_disconnect(xid, tcon); | |
2885 | free_xid(xid); | |
2886 | } | |
2887 | ||
2888 | if (rc) | |
2889 | cifs_dbg(FYI, "failed to disconnect IPC tcon (rc=%d)\n", rc); | |
2890 | ||
2891 | tconInfoFree(tcon); | |
2892 | ses->tcon_ipc = NULL; | |
2893 | return rc; | |
2894 | } | |
2895 | ||
96daf2b0 | 2896 | static struct cifs_ses * |
4ff67b72 | 2897 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 2898 | { |
96daf2b0 | 2899 | struct cifs_ses *ses; |
dea570e0 | 2900 | |
3f9bcca7 | 2901 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 | 2902 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
7f48558e SP |
2903 | if (ses->status == CifsExiting) |
2904 | continue; | |
37bb04e5 PS |
2905 | if (!match_session(ses, vol)) |
2906 | continue; | |
14fbf50d | 2907 | ++ses->ses_count; |
3f9bcca7 | 2908 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2909 | return ses; |
2910 | } | |
3f9bcca7 | 2911 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2912 | return NULL; |
2913 | } | |
dea570e0 | 2914 | |
5072010c | 2915 | void cifs_put_smb_ses(struct cifs_ses *ses) |
14fbf50d | 2916 | { |
7f48558e | 2917 | unsigned int rc, xid; |
14fbf50d | 2918 | struct TCP_Server_Info *server = ses->server; |
dea570e0 | 2919 | |
f96637be | 2920 | cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count); |
7f48558e | 2921 | |
3f9bcca7 | 2922 | spin_lock(&cifs_tcp_ses_lock); |
7f48558e SP |
2923 | if (ses->status == CifsExiting) { |
2924 | spin_unlock(&cifs_tcp_ses_lock); | |
2925 | return; | |
2926 | } | |
14fbf50d | 2927 | if (--ses->ses_count > 0) { |
3f9bcca7 | 2928 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
2929 | return; |
2930 | } | |
7f48558e SP |
2931 | if (ses->status == CifsGood) |
2932 | ses->status = CifsExiting; | |
3f9bcca7 | 2933 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2934 | |
b327a717 AA |
2935 | cifs_free_ipc(ses); |
2936 | ||
7f48558e | 2937 | if (ses->status == CifsExiting && server->ops->logoff) { |
6d5786a3 | 2938 | xid = get_xid(); |
7f48558e SP |
2939 | rc = server->ops->logoff(xid, ses); |
2940 | if (rc) | |
2941 | cifs_dbg(VFS, "%s: Session Logoff failure rc=%d\n", | |
2942 | __func__, rc); | |
6d5786a3 | 2943 | _free_xid(xid); |
14fbf50d | 2944 | } |
7f48558e SP |
2945 | |
2946 | spin_lock(&cifs_tcp_ses_lock); | |
2947 | list_del_init(&ses->smb_ses_list); | |
2948 | spin_unlock(&cifs_tcp_ses_lock); | |
2949 | ||
14fbf50d | 2950 | sesInfoFree(ses); |
53e0e11e | 2951 | cifs_put_tcp_session(server, 0); |
14fbf50d | 2952 | } |
dea570e0 | 2953 | |
8a8798a5 JL |
2954 | #ifdef CONFIG_KEYS |
2955 | ||
057d6332 CG |
2956 | /* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */ |
2957 | #define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1) | |
8a8798a5 JL |
2958 | |
2959 | /* Populate username and pw fields from keyring if possible */ | |
2960 | static int | |
2961 | cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) | |
2962 | { | |
2963 | int rc = 0; | |
146aa8b1 DH |
2964 | const char *delim, *payload; |
2965 | char *desc; | |
8a8798a5 JL |
2966 | ssize_t len; |
2967 | struct key *key; | |
2968 | struct TCP_Server_Info *server = ses->server; | |
2969 | struct sockaddr_in *sa; | |
2970 | struct sockaddr_in6 *sa6; | |
146aa8b1 | 2971 | const struct user_key_payload *upayload; |
8a8798a5 JL |
2972 | |
2973 | desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL); | |
2974 | if (!desc) | |
2975 | return -ENOMEM; | |
2976 | ||
2977 | /* try to find an address key first */ | |
2978 | switch (server->dstaddr.ss_family) { | |
2979 | case AF_INET: | |
2980 | sa = (struct sockaddr_in *)&server->dstaddr; | |
2981 | sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr); | |
2982 | break; | |
2983 | case AF_INET6: | |
2984 | sa6 = (struct sockaddr_in6 *)&server->dstaddr; | |
2985 | sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr); | |
2986 | break; | |
2987 | default: | |
f96637be JP |
2988 | cifs_dbg(FYI, "Bad ss_family (%hu)\n", |
2989 | server->dstaddr.ss_family); | |
8a8798a5 JL |
2990 | rc = -EINVAL; |
2991 | goto out_err; | |
2992 | } | |
2993 | ||
f96637be | 2994 | cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
8a8798a5 JL |
2995 | key = request_key(&key_type_logon, desc, ""); |
2996 | if (IS_ERR(key)) { | |
2997 | if (!ses->domainName) { | |
f96637be | 2998 | cifs_dbg(FYI, "domainName is NULL\n"); |
8a8798a5 JL |
2999 | rc = PTR_ERR(key); |
3000 | goto out_err; | |
3001 | } | |
3002 | ||
3003 | /* didn't work, try to find a domain key */ | |
3004 | sprintf(desc, "cifs:d:%s", ses->domainName); | |
f96637be | 3005 | cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
8a8798a5 JL |
3006 | key = request_key(&key_type_logon, desc, ""); |
3007 | if (IS_ERR(key)) { | |
3008 | rc = PTR_ERR(key); | |
3009 | goto out_err; | |
3010 | } | |
3011 | } | |
3012 | ||
3013 | down_read(&key->sem); | |
0837e49a | 3014 | upayload = user_key_payload_locked(key); |
8a8798a5 | 3015 | if (IS_ERR_OR_NULL(upayload)) { |
4edc53c1 | 3016 | rc = upayload ? PTR_ERR(upayload) : -EINVAL; |
8a8798a5 JL |
3017 | goto out_key_put; |
3018 | } | |
3019 | ||
3020 | /* find first : in payload */ | |
146aa8b1 | 3021 | payload = upayload->data; |
8a8798a5 | 3022 | delim = strnchr(payload, upayload->datalen, ':'); |
f96637be | 3023 | cifs_dbg(FYI, "payload=%s\n", payload); |
8a8798a5 | 3024 | if (!delim) { |
f96637be JP |
3025 | cifs_dbg(FYI, "Unable to find ':' in payload (datalen=%d)\n", |
3026 | upayload->datalen); | |
8a8798a5 JL |
3027 | rc = -EINVAL; |
3028 | goto out_key_put; | |
3029 | } | |
3030 | ||
3031 | len = delim - payload; | |
8c3a2b4c | 3032 | if (len > CIFS_MAX_USERNAME_LEN || len <= 0) { |
f96637be JP |
3033 | cifs_dbg(FYI, "Bad value from username search (len=%zd)\n", |
3034 | len); | |
8a8798a5 JL |
3035 | rc = -EINVAL; |
3036 | goto out_key_put; | |
3037 | } | |
3038 | ||
3039 | vol->username = kstrndup(payload, len, GFP_KERNEL); | |
3040 | if (!vol->username) { | |
f96637be JP |
3041 | cifs_dbg(FYI, "Unable to allocate %zd bytes for username\n", |
3042 | len); | |
8a8798a5 JL |
3043 | rc = -ENOMEM; |
3044 | goto out_key_put; | |
3045 | } | |
f96637be | 3046 | cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username); |
8a8798a5 JL |
3047 | |
3048 | len = key->datalen - (len + 1); | |
8c3a2b4c | 3049 | if (len > CIFS_MAX_PASSWORD_LEN || len <= 0) { |
f96637be | 3050 | cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len); |
8a8798a5 JL |
3051 | rc = -EINVAL; |
3052 | kfree(vol->username); | |
3053 | vol->username = NULL; | |
3054 | goto out_key_put; | |
3055 | } | |
3056 | ||
3057 | ++delim; | |
3058 | vol->password = kstrndup(delim, len, GFP_KERNEL); | |
3059 | if (!vol->password) { | |
f96637be JP |
3060 | cifs_dbg(FYI, "Unable to allocate %zd bytes for password\n", |
3061 | len); | |
8a8798a5 JL |
3062 | rc = -ENOMEM; |
3063 | kfree(vol->username); | |
3064 | vol->username = NULL; | |
3065 | goto out_key_put; | |
3066 | } | |
3067 | ||
3068 | out_key_put: | |
3069 | up_read(&key->sem); | |
3070 | key_put(key); | |
3071 | out_err: | |
3072 | kfree(desc); | |
f96637be | 3073 | cifs_dbg(FYI, "%s: returning %d\n", __func__, rc); |
8a8798a5 JL |
3074 | return rc; |
3075 | } | |
3076 | #else /* ! CONFIG_KEYS */ | |
3077 | static inline int | |
3078 | cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), | |
3079 | struct cifs_ses *ses __attribute__((unused))) | |
3080 | { | |
3081 | return -ENOSYS; | |
3082 | } | |
3083 | #endif /* CONFIG_KEYS */ | |
3084 | ||
4a1360d0 AA |
3085 | /** |
3086 | * cifs_get_smb_ses - get a session matching @volume_info data from @server | |
3087 | * | |
3088 | * This function assumes it is being called from cifs_mount() where we | |
3089 | * already got a server reference (server refcount +1). See | |
3090 | * cifs_get_tcon() for refcount explanations. | |
3091 | */ | |
5072010c | 3092 | struct cifs_ses * |
36988c76 JL |
3093 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
3094 | { | |
286170aa PS |
3095 | int rc = -ENOMEM; |
3096 | unsigned int xid; | |
96daf2b0 | 3097 | struct cifs_ses *ses; |
a9f1b85e PS |
3098 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
3099 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 | 3100 | |
6d5786a3 | 3101 | xid = get_xid(); |
36988c76 | 3102 | |
4ff67b72 | 3103 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 | 3104 | if (ses) { |
f96637be JP |
3105 | cifs_dbg(FYI, "Existing smb sess found (status=%d)\n", |
3106 | ses->status); | |
36988c76 | 3107 | |
36988c76 | 3108 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
3109 | rc = cifs_negotiate_protocol(xid, ses); |
3110 | if (rc) { | |
3111 | mutex_unlock(&ses->session_mutex); | |
3112 | /* problem -- put our ses reference */ | |
3113 | cifs_put_smb_ses(ses); | |
6d5786a3 | 3114 | free_xid(xid); |
198b5682 JL |
3115 | return ERR_PTR(rc); |
3116 | } | |
36988c76 | 3117 | if (ses->need_reconnect) { |
f96637be | 3118 | cifs_dbg(FYI, "Session needs reconnect\n"); |
36988c76 JL |
3119 | rc = cifs_setup_session(xid, ses, |
3120 | volume_info->local_nls); | |
3121 | if (rc) { | |
3122 | mutex_unlock(&ses->session_mutex); | |
3123 | /* problem -- put our reference */ | |
3124 | cifs_put_smb_ses(ses); | |
6d5786a3 | 3125 | free_xid(xid); |
36988c76 JL |
3126 | return ERR_PTR(rc); |
3127 | } | |
3128 | } | |
3129 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
3130 | |
3131 | /* existing SMB ses has a server reference already */ | |
53e0e11e | 3132 | cifs_put_tcp_session(server, 0); |
6d5786a3 | 3133 | free_xid(xid); |
36988c76 JL |
3134 | return ses; |
3135 | } | |
3136 | ||
f96637be | 3137 | cifs_dbg(FYI, "Existing smb sess not found\n"); |
36988c76 JL |
3138 | ses = sesInfoAlloc(); |
3139 | if (ses == NULL) | |
3140 | goto get_ses_fail; | |
3141 | ||
3142 | /* new SMB session uses our server ref */ | |
3143 | ses->server = server; | |
a9f1b85e PS |
3144 | if (server->dstaddr.ss_family == AF_INET6) |
3145 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 3146 | else |
a9f1b85e | 3147 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 3148 | |
8727c8a8 SF |
3149 | if (volume_info->username) { |
3150 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
3151 | if (!ses->user_name) | |
3152 | goto get_ses_fail; | |
3153 | } | |
36988c76 JL |
3154 | |
3155 | /* volume_info->password freed at unmount */ | |
3156 | if (volume_info->password) { | |
3157 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
3158 | if (!ses->password) | |
3159 | goto get_ses_fail; | |
3160 | } | |
3161 | if (volume_info->domainname) { | |
d3686d54 SP |
3162 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
3163 | if (!ses->domainName) | |
3164 | goto get_ses_fail; | |
36988c76 | 3165 | } |
39566443 GP |
3166 | if (volume_info->domainauto) |
3167 | ses->domainAuto = volume_info->domainauto; | |
3e4b3e1f | 3168 | ses->cred_uid = volume_info->cred_uid; |
36988c76 | 3169 | ses->linux_uid = volume_info->linux_uid; |
d9b94201 | 3170 | |
28e11bd8 JL |
3171 | ses->sectype = volume_info->sectype; |
3172 | ses->sign = volume_info->sign; | |
36988c76 JL |
3173 | |
3174 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
3175 | rc = cifs_negotiate_protocol(xid, ses); |
3176 | if (!rc) | |
3177 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 3178 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 3179 | if (rc) |
36988c76 JL |
3180 | goto get_ses_fail; |
3181 | ||
3182 | /* success, put it on the list */ | |
3f9bcca7 | 3183 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 3184 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 3185 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 | 3186 | |
6d5786a3 | 3187 | free_xid(xid); |
b327a717 AA |
3188 | |
3189 | cifs_setup_ipc(ses, volume_info); | |
3190 | ||
36988c76 JL |
3191 | return ses; |
3192 | ||
3193 | get_ses_fail: | |
3194 | sesInfoFree(ses); | |
6d5786a3 | 3195 | free_xid(xid); |
36988c76 JL |
3196 | return ERR_PTR(rc); |
3197 | } | |
3198 | ||
ae6f8dd4 | 3199 | static int match_tcon(struct cifs_tcon *tcon, struct smb_vol *volume_info) |
37bb04e5 PS |
3200 | { |
3201 | if (tcon->tidStatus == CifsExiting) | |
3202 | return 0; | |
ae6f8dd4 | 3203 | if (strncmp(tcon->treeName, volume_info->UNC, MAX_TREE_SIZE)) |
37bb04e5 | 3204 | return 0; |
ae6f8dd4 PS |
3205 | if (tcon->seal != volume_info->seal) |
3206 | return 0; | |
ae6f8dd4 PS |
3207 | if (tcon->snapshot_time != volume_info->snapshot_time) |
3208 | return 0; | |
ca567eb2 SF |
3209 | if (tcon->handle_timeout != volume_info->handle_timeout) |
3210 | return 0; | |
37bb04e5 PS |
3211 | return 1; |
3212 | } | |
3213 | ||
96daf2b0 | 3214 | static struct cifs_tcon * |
8b217fe7 | 3215 | cifs_find_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) |
f1987b44 JL |
3216 | { |
3217 | struct list_head *tmp; | |
96daf2b0 | 3218 | struct cifs_tcon *tcon; |
f1987b44 | 3219 | |
3f9bcca7 | 3220 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 3221 | list_for_each(tmp, &ses->tcon_list) { |
96daf2b0 | 3222 | tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
ae6f8dd4 | 3223 | if (!match_tcon(tcon, volume_info)) |
f1987b44 | 3224 | continue; |
f1987b44 | 3225 | ++tcon->tc_count; |
3f9bcca7 | 3226 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 3227 | return tcon; |
1da177e4 | 3228 | } |
3f9bcca7 | 3229 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
3230 | return NULL; |
3231 | } | |
3232 | ||
53e0e11e | 3233 | void |
96daf2b0 | 3234 | cifs_put_tcon(struct cifs_tcon *tcon) |
f1987b44 | 3235 | { |
2e6e02ab | 3236 | unsigned int xid; |
b327a717 | 3237 | struct cifs_ses *ses; |
f1987b44 | 3238 | |
b327a717 AA |
3239 | /* |
3240 | * IPC tcon share the lifetime of their session and are | |
3241 | * destroyed in the session put function | |
3242 | */ | |
3243 | if (tcon == NULL || tcon->ipc) | |
3244 | return; | |
3245 | ||
3246 | ses = tcon->ses; | |
f96637be | 3247 | cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
3f9bcca7 | 3248 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 3249 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 3250 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
3251 | return; |
3252 | } | |
3253 | ||
3254 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 3255 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 | 3256 | |
6d5786a3 | 3257 | xid = get_xid(); |
2e6e02ab PS |
3258 | if (ses->server->ops->tree_disconnect) |
3259 | ses->server->ops->tree_disconnect(xid, tcon); | |
6d5786a3 | 3260 | _free_xid(xid); |
f1987b44 | 3261 | |
d03382ce | 3262 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 3263 | tconInfoFree(tcon); |
f1987b44 JL |
3264 | cifs_put_smb_ses(ses); |
3265 | } | |
3266 | ||
4a1360d0 AA |
3267 | /** |
3268 | * cifs_get_tcon - get a tcon matching @volume_info data from @ses | |
3269 | * | |
3270 | * - tcon refcount is the number of mount points using the tcon. | |
3271 | * - ses refcount is the number of tcon using the session. | |
3272 | * | |
3273 | * 1. This function assumes it is being called from cifs_mount() where | |
3274 | * we already got a session reference (ses refcount +1). | |
3275 | * | |
3276 | * 2. Since we're in the context of adding a mount point, the end | |
3277 | * result should be either: | |
3278 | * | |
3279 | * a) a new tcon already allocated with refcount=1 (1 mount point) and | |
3280 | * its session refcount incremented (1 new tcon). This +1 was | |
3281 | * already done in (1). | |
3282 | * | |
3283 | * b) an existing tcon with refcount+1 (add a mount point to it) and | |
3284 | * identical ses refcount (no new tcon). Because of (1) we need to | |
3285 | * decrement the ses refcount. | |
3286 | */ | |
96daf2b0 SF |
3287 | static struct cifs_tcon * |
3288 | cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) | |
d00c28de JL |
3289 | { |
3290 | int rc, xid; | |
96daf2b0 | 3291 | struct cifs_tcon *tcon; |
d00c28de | 3292 | |
8b217fe7 | 3293 | tcon = cifs_find_tcon(ses, volume_info); |
d00c28de | 3294 | if (tcon) { |
4a1360d0 AA |
3295 | /* |
3296 | * tcon has refcount already incremented but we need to | |
3297 | * decrement extra ses reference gotten by caller (case b) | |
3298 | */ | |
f96637be | 3299 | cifs_dbg(FYI, "Found match on UNC path\n"); |
d00c28de | 3300 | cifs_put_smb_ses(ses); |
d00c28de JL |
3301 | return tcon; |
3302 | } | |
3303 | ||
2e6e02ab PS |
3304 | if (!ses->server->ops->tree_connect) { |
3305 | rc = -ENOSYS; | |
3306 | goto out_fail; | |
3307 | } | |
3308 | ||
d00c28de JL |
3309 | tcon = tconInfoAlloc(); |
3310 | if (tcon == NULL) { | |
3311 | rc = -ENOMEM; | |
3312 | goto out_fail; | |
3313 | } | |
3314 | ||
8b217fe7 | 3315 | if (volume_info->snapshot_time) { |
8b217fe7 SF |
3316 | if (ses->server->vals->protocol_id == 0) { |
3317 | cifs_dbg(VFS, | |
3318 | "Use SMB2 or later for snapshot mount option\n"); | |
3319 | rc = -EOPNOTSUPP; | |
3320 | goto out_fail; | |
3321 | } else | |
3322 | tcon->snapshot_time = volume_info->snapshot_time; | |
8b217fe7 SF |
3323 | } |
3324 | ||
ca567eb2 SF |
3325 | if (volume_info->handle_timeout) { |
3326 | if (ses->server->vals->protocol_id == 0) { | |
3327 | cifs_dbg(VFS, | |
3328 | "Use SMB2.1 or later for handle timeout option\n"); | |
3329 | rc = -EOPNOTSUPP; | |
3330 | goto out_fail; | |
3331 | } else | |
3332 | tcon->handle_timeout = volume_info->handle_timeout; | |
3333 | } | |
3334 | ||
d00c28de JL |
3335 | tcon->ses = ses; |
3336 | if (volume_info->password) { | |
3337 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
3338 | if (!tcon->password) { | |
3339 | rc = -ENOMEM; | |
3340 | goto out_fail; | |
3341 | } | |
3342 | } | |
3343 | ||
23657ad7 SF |
3344 | if (volume_info->seal) { |
3345 | if (ses->server->vals->protocol_id == 0) { | |
3346 | cifs_dbg(VFS, | |
3347 | "SMB3 or later required for encryption\n"); | |
3348 | rc = -EOPNOTSUPP; | |
3349 | goto out_fail; | |
3350 | } else if (tcon->ses->server->capabilities & | |
3351 | SMB2_GLOBAL_CAP_ENCRYPTION) | |
3352 | tcon->seal = true; | |
3353 | else { | |
3354 | cifs_dbg(VFS, "Encryption is not supported on share\n"); | |
3355 | rc = -EOPNOTSUPP; | |
3356 | goto out_fail; | |
3357 | } | |
3358 | } | |
3359 | ||
8505c8bf SF |
3360 | if (volume_info->linux_ext) { |
3361 | if (ses->server->posix_ext_supported) { | |
b326614e | 3362 | tcon->posix_extensions = true; |
2fbb5644 SF |
3363 | printk_once(KERN_WARNING |
3364 | "SMB3.11 POSIX Extensions are experimental\n"); | |
8505c8bf SF |
3365 | } else { |
3366 | cifs_dbg(VFS, "Server does not support mounting with posix SMB3.11 extensions.\n"); | |
3367 | rc = -EOPNOTSUPP; | |
3368 | goto out_fail; | |
2fbb5644 | 3369 | } |
b326614e | 3370 | } |
b326614e | 3371 | |
2e6e02ab PS |
3372 | /* |
3373 | * BB Do we need to wrap session_mutex around this TCon call and Unix | |
3374 | * SetFS as we do on SessSetup and reconnect? | |
3375 | */ | |
6d5786a3 | 3376 | xid = get_xid(); |
2e6e02ab PS |
3377 | rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon, |
3378 | volume_info->local_nls); | |
6d5786a3 | 3379 | free_xid(xid); |
f96637be | 3380 | cifs_dbg(FYI, "Tcon rc = %d\n", rc); |
d00c28de JL |
3381 | if (rc) |
3382 | goto out_fail; | |
3383 | ||
b618f001 SF |
3384 | tcon->use_persistent = false; |
3385 | /* check if SMB2 or later, CIFS does not support persistent handles */ | |
3386 | if (volume_info->persistent) { | |
3387 | if (ses->server->vals->protocol_id == 0) { | |
3388 | cifs_dbg(VFS, | |
3389 | "SMB3 or later required for persistent handles\n"); | |
3390 | rc = -EOPNOTSUPP; | |
3391 | goto out_fail; | |
3392 | } else if (ses->server->capabilities & | |
3393 | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) | |
3394 | tcon->use_persistent = true; | |
3395 | else /* persistent handles requested but not supported */ { | |
3396 | cifs_dbg(VFS, | |
3397 | "Persistent handles not supported on share\n"); | |
3398 | rc = -EOPNOTSUPP; | |
3399 | goto out_fail; | |
3400 | } | |
3401 | } else if ((tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) | |
3402 | && (ses->server->capabilities & SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) | |
3403 | && (volume_info->nopersistent == false)) { | |
3404 | cifs_dbg(FYI, "enabling persistent handles\n"); | |
3405 | tcon->use_persistent = true; | |
592fafe6 SF |
3406 | } else if (volume_info->resilient) { |
3407 | if (ses->server->vals->protocol_id == 0) { | |
3408 | cifs_dbg(VFS, | |
3409 | "SMB2.1 or later required for resilient handles\n"); | |
3410 | rc = -EOPNOTSUPP; | |
3411 | goto out_fail; | |
3412 | } | |
3413 | tcon->use_resilient = true; | |
b618f001 SF |
3414 | } |
3415 | ||
2e6e02ab PS |
3416 | /* |
3417 | * We can have only one retry value for a connection to a share so for | |
3418 | * resources mounted more than once to the same server share the last | |
3419 | * value passed in for the retry flag is used. | |
3420 | */ | |
d00c28de JL |
3421 | tcon->retry = volume_info->retry; |
3422 | tcon->nocase = volume_info->nocase; | |
3d4ef9a1 | 3423 | tcon->nohandlecache = volume_info->nohandlecache; |
d00c28de | 3424 | tcon->local_lease = volume_info->local_lease; |
233839b1 | 3425 | INIT_LIST_HEAD(&tcon->pending_opens); |
d00c28de | 3426 | |
3f9bcca7 | 3427 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 3428 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 3429 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 3430 | |
d03382ce SJ |
3431 | cifs_fscache_get_super_cookie(tcon); |
3432 | ||
d00c28de JL |
3433 | return tcon; |
3434 | ||
3435 | out_fail: | |
3436 | tconInfoFree(tcon); | |
3437 | return ERR_PTR(rc); | |
3438 | } | |
3439 | ||
9d002df4 JL |
3440 | void |
3441 | cifs_put_tlink(struct tcon_link *tlink) | |
3442 | { | |
3443 | if (!tlink || IS_ERR(tlink)) | |
3444 | return; | |
3445 | ||
3446 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
3447 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
3448 | tlink->tl_time = jiffies; | |
3449 | return; | |
3450 | } | |
3451 | ||
3452 | if (!IS_ERR(tlink_tcon(tlink))) | |
3453 | cifs_put_tcon(tlink_tcon(tlink)); | |
3454 | kfree(tlink); | |
3455 | return; | |
3456 | } | |
d00c28de | 3457 | |
25c7f41e PS |
3458 | static int |
3459 | compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
3460 | { | |
3461 | struct cifs_sb_info *old = CIFS_SB(sb); | |
3462 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
3463 | ||
3464 | if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) | |
3465 | return 0; | |
3466 | ||
3467 | if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) != | |
3468 | (new->mnt_cifs_flags & CIFS_MOUNT_MASK)) | |
3469 | return 0; | |
3470 | ||
25c7f41e | 3471 | /* |
5eba8ab3 JL |
3472 | * We want to share sb only if we don't specify an r/wsize or |
3473 | * specified r/wsize is greater than or equal to existing one. | |
25c7f41e PS |
3474 | */ |
3475 | if (new->wsize && new->wsize < old->wsize) | |
3476 | return 0; | |
3477 | ||
5eba8ab3 JL |
3478 | if (new->rsize && new->rsize < old->rsize) |
3479 | return 0; | |
3480 | ||
1f68233c | 3481 | if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid)) |
25c7f41e PS |
3482 | return 0; |
3483 | ||
3484 | if (old->mnt_file_mode != new->mnt_file_mode || | |
3485 | old->mnt_dir_mode != new->mnt_dir_mode) | |
3486 | return 0; | |
3487 | ||
3488 | if (strcmp(old->local_nls->charset, new->local_nls->charset)) | |
3489 | return 0; | |
3490 | ||
3491 | if (old->actimeo != new->actimeo) | |
3492 | return 0; | |
3493 | ||
3494 | return 1; | |
3495 | } | |
3496 | ||
c1d8b24d SP |
3497 | static int |
3498 | match_prepath(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
3499 | { | |
3500 | struct cifs_sb_info *old = CIFS_SB(sb); | |
3501 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
cd8c4296 SP |
3502 | bool old_set = old->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH; |
3503 | bool new_set = new->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH; | |
c1d8b24d | 3504 | |
cd8c4296 | 3505 | if (old_set && new_set && !strcmp(new->prepath, old->prepath)) |
c1d8b24d | 3506 | return 1; |
cd8c4296 SP |
3507 | else if (!old_set && !new_set) |
3508 | return 1; | |
3509 | ||
c1d8b24d SP |
3510 | return 0; |
3511 | } | |
3512 | ||
25c7f41e PS |
3513 | int |
3514 | cifs_match_super(struct super_block *sb, void *data) | |
3515 | { | |
3516 | struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; | |
3517 | struct smb_vol *volume_info; | |
3518 | struct cifs_sb_info *cifs_sb; | |
3519 | struct TCP_Server_Info *tcp_srv; | |
96daf2b0 SF |
3520 | struct cifs_ses *ses; |
3521 | struct cifs_tcon *tcon; | |
25c7f41e | 3522 | struct tcon_link *tlink; |
25c7f41e PS |
3523 | int rc = 0; |
3524 | ||
25c7f41e PS |
3525 | spin_lock(&cifs_tcp_ses_lock); |
3526 | cifs_sb = CIFS_SB(sb); | |
3527 | tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
3528 | if (IS_ERR(tlink)) { | |
3529 | spin_unlock(&cifs_tcp_ses_lock); | |
3530 | return rc; | |
3531 | } | |
3532 | tcon = tlink_tcon(tlink); | |
3533 | ses = tcon->ses; | |
3534 | tcp_srv = ses->server; | |
3535 | ||
3536 | volume_info = mnt_data->vol; | |
3537 | ||
9fa114f7 | 3538 | if (!match_server(tcp_srv, volume_info) || |
25c7f41e | 3539 | !match_session(ses, volume_info) || |
ae6f8dd4 | 3540 | !match_tcon(tcon, volume_info) || |
c1d8b24d | 3541 | !match_prepath(sb, mnt_data)) { |
25c7f41e PS |
3542 | rc = 0; |
3543 | goto out; | |
3544 | } | |
3545 | ||
3546 | rc = compare_mount_options(sb, mnt_data); | |
3547 | out: | |
25c7f41e | 3548 | spin_unlock(&cifs_tcp_ses_lock); |
f484b5d0 | 3549 | cifs_put_tlink(tlink); |
25c7f41e PS |
3550 | return rc; |
3551 | } | |
3552 | ||
09e50d55 JL |
3553 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
3554 | static struct lock_class_key cifs_key[2]; | |
3555 | static struct lock_class_key cifs_slock_key[2]; | |
3556 | ||
3557 | static inline void | |
3558 | cifs_reclassify_socket4(struct socket *sock) | |
3559 | { | |
3560 | struct sock *sk = sock->sk; | |
fafc4e1e | 3561 | BUG_ON(!sock_allow_reclassification(sk)); |
09e50d55 JL |
3562 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", |
3563 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
3564 | } | |
3565 | ||
3566 | static inline void | |
3567 | cifs_reclassify_socket6(struct socket *sock) | |
3568 | { | |
3569 | struct sock *sk = sock->sk; | |
fafc4e1e | 3570 | BUG_ON(!sock_allow_reclassification(sk)); |
09e50d55 JL |
3571 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", |
3572 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
3573 | } | |
3574 | #else | |
3575 | static inline void | |
3576 | cifs_reclassify_socket4(struct socket *sock) | |
3577 | { | |
3578 | } | |
3579 | ||
3580 | static inline void | |
3581 | cifs_reclassify_socket6(struct socket *sock) | |
3582 | { | |
3583 | } | |
3584 | #endif | |
3585 | ||
1da177e4 | 3586 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 3587 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 3588 | { |
50c2f753 | 3589 | unsigned int i, j; |
1da177e4 | 3590 | |
50c2f753 | 3591 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
3592 | /* mask a nibble at a time and encode */ |
3593 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
3594 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 3595 | j += 2; |
1da177e4 LT |
3596 | } |
3597 | ||
3598 | } | |
3599 | ||
3eb9a889 BG |
3600 | static int |
3601 | bind_socket(struct TCP_Server_Info *server) | |
3602 | { | |
3603 | int rc = 0; | |
3604 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
3605 | /* Bind to the specified local IP address */ | |
3606 | struct socket *socket = server->ssocket; | |
3607 | rc = socket->ops->bind(socket, | |
3608 | (struct sockaddr *) &server->srcaddr, | |
3609 | sizeof(server->srcaddr)); | |
3610 | if (rc < 0) { | |
3611 | struct sockaddr_in *saddr4; | |
3612 | struct sockaddr_in6 *saddr6; | |
3613 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
3614 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
3615 | if (saddr6->sin6_family == AF_INET6) | |
f96637be JP |
3616 | cifs_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n", |
3617 | &saddr6->sin6_addr, rc); | |
3eb9a889 | 3618 | else |
f96637be JP |
3619 | cifs_dbg(VFS, "Failed to bind to: %pI4, error: %d\n", |
3620 | &saddr4->sin_addr.s_addr, rc); | |
3eb9a889 BG |
3621 | } |
3622 | } | |
3623 | return rc; | |
3624 | } | |
1da177e4 LT |
3625 | |
3626 | static int | |
a9f1b85e | 3627 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
3628 | { |
3629 | int rc = 0; | |
a9f1b85e PS |
3630 | /* |
3631 | * some servers require RFC1001 sessinit before sending | |
3632 | * negprot - BB check reconnection in case where second | |
3633 | * sessinit is sent but no second negprot | |
3634 | */ | |
3635 | struct rfc1002_session_packet *ses_init_buf; | |
3636 | struct smb_hdr *smb_buf; | |
3637 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
3638 | GFP_KERNEL); | |
3639 | if (ses_init_buf) { | |
3640 | ses_init_buf->trailer.session_req.called_len = 32; | |
3641 | ||
997152f6 | 3642 | if (server->server_RFC1001_name[0] != 0) |
a9f1b85e PS |
3643 | rfc1002mangle(ses_init_buf->trailer. |
3644 | session_req.called_name, | |
3645 | server->server_RFC1001_name, | |
3646 | RFC1001_NAME_LEN_WITH_NULL); | |
3647 | else | |
3648 | rfc1002mangle(ses_init_buf->trailer. | |
3649 | session_req.called_name, | |
3650 | DEFAULT_CIFS_CALLED_NAME, | |
3651 | RFC1001_NAME_LEN_WITH_NULL); | |
3652 | ||
3653 | ses_init_buf->trailer.session_req.calling_len = 32; | |
3654 | ||
3655 | /* | |
3656 | * calling name ends in null (byte 16) from old smb | |
3657 | * convention. | |
3658 | */ | |
c85c35f8 | 3659 | if (server->workstation_RFC1001_name[0] != 0) |
a9f1b85e PS |
3660 | rfc1002mangle(ses_init_buf->trailer. |
3661 | session_req.calling_name, | |
3662 | server->workstation_RFC1001_name, | |
3663 | RFC1001_NAME_LEN_WITH_NULL); | |
3664 | else | |
3665 | rfc1002mangle(ses_init_buf->trailer. | |
3666 | session_req.calling_name, | |
3667 | "LINUX_CIFS_CLNT", | |
3668 | RFC1001_NAME_LEN_WITH_NULL); | |
3669 | ||
3670 | ses_init_buf->trailer.session_req.scope1 = 0; | |
3671 | ses_init_buf->trailer.session_req.scope2 = 0; | |
3672 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
3673 | ||
3674 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
be8e3b00 | 3675 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
a9f1b85e PS |
3676 | rc = smb_send(server, smb_buf, 0x44); |
3677 | kfree(ses_init_buf); | |
3678 | /* | |
3679 | * RFC1001 layer in at least one server | |
3680 | * requires very short break before negprot | |
3681 | * presumably because not expecting negprot | |
3682 | * to follow so fast. This is a simple | |
3683 | * solution that works without | |
3684 | * complicating the code and causes no | |
3685 | * significant slowing down on mount | |
3686 | * for everyone else | |
3687 | */ | |
3688 | usleep_range(1000, 2000); | |
3689 | } | |
3690 | /* | |
3691 | * else the negprot may still work without this | |
3692 | * even though malloc failed | |
3693 | */ | |
3694 | ||
3695 | return rc; | |
3696 | } | |
3697 | ||
3698 | static int | |
3699 | generic_ip_connect(struct TCP_Server_Info *server) | |
3700 | { | |
3701 | int rc = 0; | |
6da97910 | 3702 | __be16 sport; |
a9f1b85e | 3703 | int slen, sfamily; |
bcf4b106 | 3704 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
3705 | struct sockaddr *saddr; |
3706 | ||
3707 | saddr = (struct sockaddr *) &server->dstaddr; | |
3708 | ||
3709 | if (server->dstaddr.ss_family == AF_INET6) { | |
3710 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
3711 | slen = sizeof(struct sockaddr_in6); | |
3712 | sfamily = AF_INET6; | |
3713 | } else { | |
3714 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
3715 | slen = sizeof(struct sockaddr_in); | |
3716 | sfamily = AF_INET; | |
3717 | } | |
1da177e4 | 3718 | |
bcf4b106 | 3719 | if (socket == NULL) { |
f1d0c998 RL |
3720 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
3721 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 3722 | if (rc < 0) { |
f96637be | 3723 | cifs_dbg(VFS, "Error %d creating socket\n", rc); |
a9f1b85e | 3724 | server->ssocket = NULL; |
1da177e4 | 3725 | return rc; |
1da177e4 | 3726 | } |
bcf4b106 JL |
3727 | |
3728 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
f96637be | 3729 | cifs_dbg(FYI, "Socket created\n"); |
bcf4b106 JL |
3730 | server->ssocket = socket; |
3731 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
3732 | if (sfamily == AF_INET6) |
3733 | cifs_reclassify_socket6(socket); | |
3734 | else | |
3735 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
3736 | } |
3737 | ||
3eb9a889 BG |
3738 | rc = bind_socket(server); |
3739 | if (rc < 0) | |
3740 | return rc; | |
3741 | ||
bcf4b106 JL |
3742 | /* |
3743 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
3744 | * the default. sock_setsockopt not used because it expects |
3745 | * user space buffer | |
bcf4b106 JL |
3746 | */ |
3747 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 3748 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 3749 | |
b387eaeb | 3750 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
3751 | if (server->noautotune) { |
3752 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
3753 | socket->sk->sk_sndbuf = 200 * 1024; | |
3754 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
3755 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 3756 | } |
1da177e4 | 3757 | |
6a5fa236 | 3758 | if (server->tcp_nodelay) { |
a9f1b85e | 3759 | int val = 1; |
6a5fa236 SF |
3760 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
3761 | (char *)&val, sizeof(val)); | |
3762 | if (rc) | |
f96637be JP |
3763 | cifs_dbg(FYI, "set TCP_NODELAY socket option error %d\n", |
3764 | rc); | |
6a5fa236 SF |
3765 | } |
3766 | ||
f96637be | 3767 | cifs_dbg(FYI, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n", |
bcf4b106 | 3768 | socket->sk->sk_sndbuf, |
b6b38f70 | 3769 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 3770 | |
ee1b3ea9 JL |
3771 | rc = socket->ops->connect(socket, saddr, slen, 0); |
3772 | if (rc < 0) { | |
f96637be | 3773 | cifs_dbg(FYI, "Error %d connecting to server\n", rc); |
ee1b3ea9 JL |
3774 | sock_release(socket); |
3775 | server->ssocket = NULL; | |
3776 | return rc; | |
3777 | } | |
3778 | ||
a9f1b85e PS |
3779 | if (sport == htons(RFC1001_PORT)) |
3780 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 3781 | |
1da177e4 LT |
3782 | return rc; |
3783 | } | |
3784 | ||
3785 | static int | |
a9f1b85e | 3786 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 3787 | { |
6da97910 | 3788 | __be16 *sport; |
a9f1b85e PS |
3789 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
3790 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 3791 | |
a9f1b85e PS |
3792 | if (server->dstaddr.ss_family == AF_INET6) |
3793 | sport = &addr6->sin6_port; | |
3794 | else | |
3795 | sport = &addr->sin_port; | |
1da177e4 | 3796 | |
a9f1b85e PS |
3797 | if (*sport == 0) { |
3798 | int rc; | |
1da177e4 | 3799 | |
a9f1b85e PS |
3800 | /* try with 445 port at first */ |
3801 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 3802 | |
a9f1b85e | 3803 | rc = generic_ip_connect(server); |
1da177e4 | 3804 | if (rc >= 0) |
a9f1b85e | 3805 | return rc; |
6a5fa236 | 3806 | |
a9f1b85e PS |
3807 | /* if it failed, try with 139 port */ |
3808 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
3809 | } |
3810 | ||
a9f1b85e | 3811 | return generic_ip_connect(server); |
1da177e4 LT |
3812 | } |
3813 | ||
6d5786a3 | 3814 | void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon, |
2c6292ae | 3815 | struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) |
8af18971 SF |
3816 | { |
3817 | /* if we are reconnecting then should we check to see if | |
3818 | * any requested capabilities changed locally e.g. via | |
3819 | * remount but we can not do much about it here | |
3820 | * if they have (even if we could detect it by the following) | |
3821 | * Perhaps we could add a backpointer to array of sb from tcon | |
3822 | * or if we change to make all sb to same share the same | |
3823 | * sb as NFS - then we only have one backpointer to sb. | |
3824 | * What if we wanted to mount the server share twice once with | |
3825 | * and once without posixacls or posix paths? */ | |
3826 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 3827 | |
c18c842b SF |
3828 | if (vol_info && vol_info->no_linux_ext) { |
3829 | tcon->fsUnixInfo.Capability = 0; | |
3830 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
f96637be | 3831 | cifs_dbg(FYI, "Linux protocol extensions disabled\n"); |
c18c842b SF |
3832 | return; |
3833 | } else if (vol_info) | |
3834 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
3835 | ||
3836 | if (tcon->unix_ext == 0) { | |
f96637be | 3837 | cifs_dbg(FYI, "Unix extensions disabled so not set on reconnect\n"); |
c18c842b SF |
3838 | return; |
3839 | } | |
50c2f753 | 3840 | |
fb8c4b14 | 3841 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 3842 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
f96637be | 3843 | cifs_dbg(FYI, "unix caps which server supports %lld\n", cap); |
8af18971 SF |
3844 | /* check for reconnect case in which we do not |
3845 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 3846 | if (vol_info == NULL) { |
50c2f753 | 3847 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
3848 | originally at mount time */ |
3849 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
3850 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
3851 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
3852 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
f96637be | 3853 | cifs_dbg(VFS, "POSIXPATH support change\n"); |
8af18971 | 3854 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 3855 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
f96637be JP |
3856 | cifs_dbg(VFS, "possible reconnect error\n"); |
3857 | cifs_dbg(VFS, "server disabled POSIX path support\n"); | |
11b6d645 | 3858 | } |
8af18971 | 3859 | } |
50c2f753 | 3860 | |
6848b733 | 3861 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
f96637be | 3862 | cifs_dbg(VFS, "per-share encryption not supported yet\n"); |
6848b733 | 3863 | |
8af18971 | 3864 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 3865 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 3866 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 3867 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
f96637be | 3868 | cifs_dbg(FYI, "negotiated posix acl support\n"); |
2c6292ae AV |
3869 | if (cifs_sb) |
3870 | cifs_sb->mnt_cifs_flags |= | |
3871 | CIFS_MOUNT_POSIXACL; | |
8af18971 SF |
3872 | } |
3873 | ||
75865f8c | 3874 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 3875 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 3876 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
f96637be | 3877 | cifs_dbg(FYI, "negotiate posix pathnames\n"); |
2c6292ae AV |
3878 | if (cifs_sb) |
3879 | cifs_sb->mnt_cifs_flags |= | |
8af18971 SF |
3880 | CIFS_MOUNT_POSIX_PATHS; |
3881 | } | |
50c2f753 | 3882 | |
f96637be | 3883 | cifs_dbg(FYI, "Negotiate caps 0x%x\n", (int)cap); |
8af18971 | 3884 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 3885 | if (cap & CIFS_UNIX_FCNTL_CAP) |
f96637be | 3886 | cifs_dbg(FYI, "FCNTL cap\n"); |
75865f8c | 3887 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
f96637be | 3888 | cifs_dbg(FYI, "EXTATTR cap\n"); |
75865f8c | 3889 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
f96637be | 3890 | cifs_dbg(FYI, "POSIX path cap\n"); |
75865f8c | 3891 | if (cap & CIFS_UNIX_XATTR_CAP) |
f96637be | 3892 | cifs_dbg(FYI, "XATTR cap\n"); |
75865f8c | 3893 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
f96637be | 3894 | cifs_dbg(FYI, "POSIX ACL cap\n"); |
75865f8c | 3895 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
f96637be | 3896 | cifs_dbg(FYI, "very large read cap\n"); |
75865f8c | 3897 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
f96637be | 3898 | cifs_dbg(FYI, "very large write cap\n"); |
6848b733 | 3899 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
f96637be | 3900 | cifs_dbg(FYI, "transport encryption cap\n"); |
6848b733 | 3901 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
f96637be | 3902 | cifs_dbg(FYI, "mandatory transport encryption cap\n"); |
8af18971 SF |
3903 | #endif /* CIFS_DEBUG2 */ |
3904 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 3905 | if (vol_info == NULL) { |
f96637be | 3906 | cifs_dbg(FYI, "resetting capabilities failed\n"); |
442aa310 | 3907 | } else |
f96637be | 3908 | 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 | 3909 | |
8af18971 SF |
3910 | } |
3911 | } | |
3912 | } | |
3913 | ||
4214ebf4 | 3914 | int cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
724d9f1c | 3915 | struct cifs_sb_info *cifs_sb) |
b1c8d2b4 | 3916 | { |
2de970ff JL |
3917 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
3918 | ||
2ced6f69 AV |
3919 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
3920 | cifs_sb->tlink_tree = RB_ROOT; | |
3921 | ||
e8506d25 | 3922 | cifs_sb->bsize = pvolume_info->bsize; |
25c7f41e | 3923 | /* |
5eba8ab3 JL |
3924 | * Temporarily set r/wsize for matching superblock. If we end up using |
3925 | * new sb then client will later negotiate it downward if needed. | |
25c7f41e | 3926 | */ |
5eba8ab3 | 3927 | cifs_sb->rsize = pvolume_info->rsize; |
25c7f41e PS |
3928 | cifs_sb->wsize = pvolume_info->wsize; |
3929 | ||
3b795210 SF |
3930 | cifs_sb->mnt_uid = pvolume_info->linux_uid; |
3931 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
3932 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
3933 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
f96637be JP |
3934 | cifs_dbg(FYI, "file mode: 0x%hx dir mode: 0x%hx\n", |
3935 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); | |
3b795210 | 3936 | |
6d20e840 | 3937 | cifs_sb->actimeo = pvolume_info->actimeo; |
724d9f1c | 3938 | cifs_sb->local_nls = pvolume_info->local_nls; |
6d20e840 | 3939 | |
8393072b AA |
3940 | if (pvolume_info->nodfs) |
3941 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_DFS; | |
3b795210 SF |
3942 | if (pvolume_info->noperm) |
3943 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
3944 | if (pvolume_info->setuids) | |
3945 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
95932655 SF |
3946 | if (pvolume_info->setuidfromacl) |
3947 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UID_FROM_ACL; | |
3b795210 SF |
3948 | if (pvolume_info->server_ino) |
3949 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
3950 | if (pvolume_info->remap) | |
2baa2682 SF |
3951 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SFM_CHR; |
3952 | if (pvolume_info->sfu_remap) | |
3b795210 SF |
3953 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; |
3954 | if (pvolume_info->no_xattr) | |
3955 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
3956 | if (pvolume_info->sfu_emul) | |
3957 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
3958 | if (pvolume_info->nobrl) | |
3959 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
3d4ef9a1 SF |
3960 | if (pvolume_info->nohandlecache) |
3961 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_HANDLE_CACHE; | |
be652445 | 3962 | if (pvolume_info->nostrictsync) |
4717bed6 | 3963 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
3964 | if (pvolume_info->mand_lock) |
3965 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
d4ffff1f PS |
3966 | if (pvolume_info->rwpidforward) |
3967 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; | |
3b795210 SF |
3968 | if (pvolume_info->cifs_acl) |
3969 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
3c7c87fd | 3970 | if (pvolume_info->backupuid_specified) { |
3d3ea8e6 | 3971 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; |
3c7c87fd SP |
3972 | cifs_sb->mnt_backupuid = pvolume_info->backupuid; |
3973 | } | |
3974 | if (pvolume_info->backupgid_specified) { | |
3d3ea8e6 | 3975 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; |
3c7c87fd SP |
3976 | cifs_sb->mnt_backupgid = pvolume_info->backupgid; |
3977 | } | |
3b795210 SF |
3978 | if (pvolume_info->override_uid) |
3979 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
3980 | if (pvolume_info->override_gid) | |
3981 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
3982 | if (pvolume_info->dynperm) | |
3983 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
3984 | if (pvolume_info->fsc) |
3985 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
3986 | if (pvolume_info->multiuser) |
3987 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
3988 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
3989 | if (pvolume_info->strict_io) |
3990 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 3991 | if (pvolume_info->direct_io) { |
f96637be | 3992 | cifs_dbg(FYI, "mounting share using direct i/o\n"); |
3b795210 SF |
3993 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
3994 | } | |
736a3320 SM |
3995 | if (pvolume_info->mfsymlinks) { |
3996 | if (pvolume_info->sfu_emul) { | |
db8b631d SF |
3997 | /* |
3998 | * Our SFU ("Services for Unix" emulation does not allow | |
3999 | * creating symlinks but does allow reading existing SFU | |
4000 | * symlinks (it does allow both creating and reading SFU | |
4001 | * style mknod and FIFOs though). When "mfsymlinks" and | |
4002 | * "sfu" are both enabled at the same time, it allows | |
4003 | * reading both types of symlinks, but will only create | |
4004 | * them with mfsymlinks format. This allows better | |
4005 | * Apple compatibility (probably better for Samba too) | |
4006 | * while still recognizing old Windows style symlinks. | |
4007 | */ | |
4008 | cifs_dbg(VFS, "mount options mfsymlinks and sfu both enabled\n"); | |
736a3320 | 4009 | } |
db8b631d | 4010 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; |
736a3320 | 4011 | } |
3b795210 SF |
4012 | |
4013 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
f96637be | 4014 | cifs_dbg(VFS, "mount option dynperm ignored if cifsacl mount option supported\n"); |
4214ebf4 SP |
4015 | |
4016 | if (pvolume_info->prepath) { | |
4017 | cifs_sb->prepath = kstrdup(pvolume_info->prepath, GFP_KERNEL); | |
4018 | if (cifs_sb->prepath == NULL) | |
4019 | return -ENOMEM; | |
4020 | } | |
4021 | ||
4022 | return 0; | |
b1c8d2b4 JL |
4023 | } |
4024 | ||
56c762eb PA |
4025 | void |
4026 | cifs_cleanup_volume_info_contents(struct smb_vol *volume_info) | |
1bfe73c2 | 4027 | { |
b946845a | 4028 | kfree(volume_info->username); |
1bfe73c2 | 4029 | kzfree(volume_info->password); |
95c75454 | 4030 | kfree(volume_info->UNC); |
b946845a SF |
4031 | kfree(volume_info->domainname); |
4032 | kfree(volume_info->iocharset); | |
1bfe73c2 | 4033 | kfree(volume_info->prepath); |
b9bce2e9 JL |
4034 | } |
4035 | ||
4036 | void | |
4037 | cifs_cleanup_volume_info(struct smb_vol *volume_info) | |
4038 | { | |
4039 | if (!volume_info) | |
4040 | return; | |
56c762eb | 4041 | cifs_cleanup_volume_info_contents(volume_info); |
1bfe73c2 | 4042 | kfree(volume_info); |
1bfe73c2 IM |
4043 | } |
4044 | ||
56c762eb PA |
4045 | /* Release all succeed connections */ |
4046 | static inline void mount_put_conns(struct cifs_sb_info *cifs_sb, | |
4047 | unsigned int xid, | |
4048 | struct TCP_Server_Info *server, | |
4049 | struct cifs_ses *ses, struct cifs_tcon *tcon) | |
4050 | { | |
4051 | int rc = 0; | |
4052 | ||
4053 | if (tcon) | |
4054 | cifs_put_tcon(tcon); | |
4055 | else if (ses) | |
4056 | cifs_put_smb_ses(ses); | |
4057 | else if (server) | |
4058 | cifs_put_tcp_session(server, 0); | |
4059 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_POSIX_PATHS; | |
4060 | free_xid(xid); | |
4061 | } | |
4062 | ||
4063 | /* Get connections for tcp, ses and tcon */ | |
4064 | static int mount_get_conns(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, | |
4065 | unsigned int *xid, | |
4066 | struct TCP_Server_Info **nserver, | |
4067 | struct cifs_ses **nses, struct cifs_tcon **ntcon) | |
4068 | { | |
4069 | int rc = 0; | |
4070 | struct TCP_Server_Info *server; | |
4071 | struct cifs_ses *ses; | |
4072 | struct cifs_tcon *tcon; | |
4073 | ||
4074 | *nserver = NULL; | |
4075 | *nses = NULL; | |
4076 | *ntcon = NULL; | |
4077 | ||
4078 | *xid = get_xid(); | |
4079 | ||
4080 | /* get a reference to a tcp session */ | |
4081 | server = cifs_get_tcp_session(vol); | |
4082 | if (IS_ERR(server)) { | |
4083 | rc = PTR_ERR(server); | |
4084 | return rc; | |
4085 | } | |
4086 | ||
4087 | *nserver = server; | |
4088 | ||
4089 | if ((vol->max_credits < 20) || (vol->max_credits > 60000)) | |
4090 | server->max_credits = SMB2_MAX_CREDITS_AVAILABLE; | |
4091 | else | |
4092 | server->max_credits = vol->max_credits; | |
4093 | ||
4094 | /* get a reference to a SMB session */ | |
4095 | ses = cifs_get_smb_ses(server, vol); | |
4096 | if (IS_ERR(ses)) { | |
4097 | rc = PTR_ERR(ses); | |
4098 | return rc; | |
4099 | } | |
4100 | ||
4101 | *nses = ses; | |
4102 | ||
4103 | if ((vol->persistent == true) && (!(ses->server->capabilities & | |
4104 | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES))) { | |
4105 | cifs_dbg(VFS, "persistent handles not supported by server\n"); | |
4106 | return -EOPNOTSUPP; | |
4107 | } | |
4108 | ||
4109 | /* search for existing tcon to this server share */ | |
4110 | tcon = cifs_get_tcon(ses, vol); | |
4111 | if (IS_ERR(tcon)) { | |
4112 | rc = PTR_ERR(tcon); | |
4113 | return rc; | |
4114 | } | |
4115 | ||
4116 | *ntcon = tcon; | |
4117 | ||
4118 | /* if new SMB3.11 POSIX extensions are supported do not remap / and \ */ | |
4119 | if (tcon->posix_extensions) | |
4120 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_POSIX_PATHS; | |
4121 | ||
4122 | /* tell server which Unix caps we support */ | |
4123 | if (cap_unix(tcon->ses)) { | |
4124 | /* | |
4125 | * reset of caps checks mount to see if unix extensions disabled | |
4126 | * for just this mount. | |
4127 | */ | |
4128 | reset_cifs_unix_caps(*xid, tcon, cifs_sb, vol); | |
4129 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && | |
4130 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & | |
4131 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) | |
4132 | return -EACCES; | |
4133 | } else | |
4134 | tcon->unix_ext = 0; /* server does not support them */ | |
4135 | ||
4136 | /* do not care if a following call succeed - informational */ | |
4137 | if (!tcon->pipe && server->ops->qfs_tcon) | |
4138 | server->ops->qfs_tcon(*xid, tcon); | |
4139 | ||
4140 | cifs_sb->wsize = server->ops->negotiate_wsize(tcon, vol); | |
4141 | cifs_sb->rsize = server->ops->negotiate_rsize(tcon, vol); | |
4142 | ||
4143 | return 0; | |
4144 | } | |
4145 | ||
4146 | static int mount_setup_tlink(struct cifs_sb_info *cifs_sb, struct cifs_ses *ses, | |
4147 | struct cifs_tcon *tcon) | |
4148 | { | |
4149 | struct tcon_link *tlink; | |
4150 | ||
4151 | /* hang the tcon off of the superblock */ | |
4152 | tlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
4153 | if (tlink == NULL) | |
4154 | return -ENOMEM; | |
4155 | ||
4156 | tlink->tl_uid = ses->linux_uid; | |
4157 | tlink->tl_tcon = tcon; | |
4158 | tlink->tl_time = jiffies; | |
4159 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
4160 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4161 | ||
4162 | cifs_sb->master_tlink = tlink; | |
4163 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4164 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); | |
4165 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4166 | ||
4167 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, | |
4168 | TLINK_IDLE_EXPIRE); | |
4169 | return 0; | |
4170 | } | |
b9bce2e9 | 4171 | |
2d6d589d | 4172 | #ifdef CONFIG_CIFS_DFS_UPCALL |
6d3ea7e4 SF |
4173 | /* |
4174 | * cifs_build_path_to_root returns full path to root when we do not have an | |
4175 | * exiting connection (tcon) | |
4176 | */ | |
1bfe73c2 | 4177 | static char * |
b2a0fa15 | 4178 | build_unc_path_to_root(const struct smb_vol *vol, |
4a367dc0 | 4179 | const struct cifs_sb_info *cifs_sb, bool useppath) |
1bfe73c2 | 4180 | { |
b2a0fa15 | 4181 | char *full_path, *pos; |
4a367dc0 PA |
4182 | unsigned int pplen = useppath && vol->prepath ? |
4183 | strlen(vol->prepath) + 1 : 0; | |
b2a0fa15 | 4184 | unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); |
1bfe73c2 | 4185 | |
b2a0fa15 | 4186 | full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); |
1bfe73c2 IM |
4187 | if (full_path == NULL) |
4188 | return ERR_PTR(-ENOMEM); | |
4189 | ||
b2a0fa15 JL |
4190 | strncpy(full_path, vol->UNC, unc_len); |
4191 | pos = full_path + unc_len; | |
4192 | ||
4193 | if (pplen) { | |
1fc29bac JL |
4194 | *pos = CIFS_DIR_SEP(cifs_sb); |
4195 | strncpy(pos + 1, vol->prepath, pplen); | |
b2a0fa15 JL |
4196 | pos += pplen; |
4197 | } | |
4198 | ||
4199 | *pos = '\0'; /* add trailing null */ | |
f87d39d9 | 4200 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
f96637be | 4201 | cifs_dbg(FYI, "%s: full_path=%s\n", __func__, full_path); |
1bfe73c2 IM |
4202 | return full_path; |
4203 | } | |
dd613945 | 4204 | |
1c780228 PA |
4205 | /** |
4206 | * expand_dfs_referral - Perform a dfs referral query and update the cifs_sb | |
4207 | * | |
dd613945 | 4208 | * |
046462ab SF |
4209 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
4210 | * to a string containing updated options for the submount. Otherwise it | |
4211 | * will be left untouched. | |
dd613945 SF |
4212 | * |
4213 | * Returns the rc from get_dfs_path to the caller, which can be used to | |
4214 | * determine whether there were referrals. | |
4215 | */ | |
4216 | static int | |
b669f33c | 4217 | expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses, |
dd613945 | 4218 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, |
046462ab | 4219 | int check_prefix) |
dd613945 SF |
4220 | { |
4221 | int rc; | |
1c780228 | 4222 | struct dfs_info3_param referral = {0}; |
dd613945 SF |
4223 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; |
4224 | ||
8393072b AA |
4225 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS) |
4226 | return -EREMOTE; | |
4227 | ||
4a367dc0 | 4228 | full_path = build_unc_path_to_root(volume_info, cifs_sb, true); |
dd613945 SF |
4229 | if (IS_ERR(full_path)) |
4230 | return PTR_ERR(full_path); | |
4231 | ||
4232 | /* For DFS paths, skip the first '\' of the UNC */ | |
4233 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; | |
4234 | ||
1c780228 PA |
4235 | rc = dfs_cache_find(xid, ses, cifs_sb->local_nls, cifs_remap(cifs_sb), |
4236 | ref_path, &referral, NULL); | |
4237 | if (!rc) { | |
dd613945 SF |
4238 | char *fake_devname = NULL; |
4239 | ||
4240 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, | |
1c780228 | 4241 | full_path + 1, &referral, |
dd613945 | 4242 | &fake_devname); |
1c780228 | 4243 | free_dfs_info_param(&referral); |
046462ab | 4244 | |
dd613945 SF |
4245 | if (IS_ERR(mdata)) { |
4246 | rc = PTR_ERR(mdata); | |
4247 | mdata = NULL; | |
b9bce2e9 | 4248 | } else { |
56c762eb | 4249 | cifs_cleanup_volume_info_contents(volume_info); |
b9bce2e9 | 4250 | rc = cifs_setup_volume_info(volume_info, mdata, |
1c780228 | 4251 | fake_devname, false); |
dd613945 | 4252 | } |
b9bce2e9 JL |
4253 | kfree(fake_devname); |
4254 | kfree(cifs_sb->mountdata); | |
046462ab | 4255 | cifs_sb->mountdata = mdata; |
dd613945 SF |
4256 | } |
4257 | kfree(full_path); | |
4258 | return rc; | |
4259 | } | |
4a367dc0 PA |
4260 | |
4261 | static inline int get_next_dfs_tgt(const char *path, | |
4262 | struct dfs_cache_tgt_list *tgt_list, | |
4263 | struct dfs_cache_tgt_iterator **tgt_it) | |
4264 | { | |
4265 | if (!*tgt_it) | |
4266 | *tgt_it = dfs_cache_get_tgt_iterator(tgt_list); | |
4267 | else | |
4268 | *tgt_it = dfs_cache_get_next_tgt(tgt_list, *tgt_it); | |
4269 | return !*tgt_it ? -EHOSTDOWN : 0; | |
4270 | } | |
4271 | ||
4272 | static int update_vol_info(const struct dfs_cache_tgt_iterator *tgt_it, | |
4273 | struct smb_vol *fake_vol, struct smb_vol *vol) | |
4274 | { | |
4275 | const char *tgt = dfs_cache_get_tgt_name(tgt_it); | |
4276 | int len = strlen(tgt) + 2; | |
4277 | char *new_unc; | |
4278 | ||
4279 | new_unc = kmalloc(len, GFP_KERNEL); | |
4280 | if (!new_unc) | |
4281 | return -ENOMEM; | |
74ea5f98 | 4282 | scnprintf(new_unc, len, "\\%s", tgt); |
4a367dc0 PA |
4283 | |
4284 | kfree(vol->UNC); | |
4285 | vol->UNC = new_unc; | |
4286 | ||
4287 | if (fake_vol->prepath) { | |
4288 | kfree(vol->prepath); | |
4289 | vol->prepath = fake_vol->prepath; | |
4290 | fake_vol->prepath = NULL; | |
4291 | } | |
4292 | memcpy(&vol->dstaddr, &fake_vol->dstaddr, sizeof(vol->dstaddr)); | |
4293 | ||
4294 | return 0; | |
4295 | } | |
4296 | ||
4297 | static int setup_dfs_tgt_conn(const char *path, | |
4298 | const struct dfs_cache_tgt_iterator *tgt_it, | |
4299 | struct cifs_sb_info *cifs_sb, | |
4300 | struct smb_vol *vol, | |
4301 | unsigned int *xid, | |
4302 | struct TCP_Server_Info **server, | |
4303 | struct cifs_ses **ses, | |
4304 | struct cifs_tcon **tcon) | |
4305 | { | |
4306 | int rc; | |
4307 | struct dfs_info3_param ref = {0}; | |
4308 | char *mdata = NULL, *fake_devname = NULL; | |
4309 | struct smb_vol fake_vol = {0}; | |
4310 | ||
4311 | cifs_dbg(FYI, "%s: dfs path: %s\n", __func__, path); | |
4312 | ||
4313 | rc = dfs_cache_get_tgt_referral(path, tgt_it, &ref); | |
4314 | if (rc) | |
4315 | return rc; | |
4316 | ||
4317 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, path, &ref, | |
4318 | &fake_devname); | |
4319 | free_dfs_info_param(&ref); | |
4320 | ||
4321 | if (IS_ERR(mdata)) { | |
4322 | rc = PTR_ERR(mdata); | |
4323 | mdata = NULL; | |
4324 | } else { | |
4325 | cifs_dbg(FYI, "%s: fake_devname: %s\n", __func__, fake_devname); | |
4326 | rc = cifs_setup_volume_info(&fake_vol, mdata, fake_devname, | |
4327 | false); | |
4328 | } | |
4329 | kfree(mdata); | |
4330 | kfree(fake_devname); | |
4331 | ||
4332 | if (!rc) { | |
4333 | /* | |
4334 | * We use a 'fake_vol' here because we need pass it down to the | |
4335 | * mount_{get,put} functions to test connection against new DFS | |
4336 | * targets. | |
4337 | */ | |
4338 | mount_put_conns(cifs_sb, *xid, *server, *ses, *tcon); | |
4339 | rc = mount_get_conns(&fake_vol, cifs_sb, xid, server, ses, | |
4340 | tcon); | |
4341 | if (!rc) { | |
4342 | /* | |
4343 | * We were able to connect to new target server. | |
4344 | * Update current volume info with new target server. | |
4345 | */ | |
4346 | rc = update_vol_info(tgt_it, &fake_vol, vol); | |
4347 | } | |
4348 | } | |
4349 | cifs_cleanup_volume_info_contents(&fake_vol); | |
4350 | return rc; | |
4351 | } | |
4352 | ||
4353 | static int mount_do_dfs_failover(const char *path, | |
4354 | struct cifs_sb_info *cifs_sb, | |
4355 | struct smb_vol *vol, | |
4356 | struct cifs_ses *root_ses, | |
4357 | unsigned int *xid, | |
4358 | struct TCP_Server_Info **server, | |
4359 | struct cifs_ses **ses, | |
4360 | struct cifs_tcon **tcon) | |
4361 | { | |
4362 | int rc; | |
4363 | struct dfs_cache_tgt_list tgt_list; | |
4364 | struct dfs_cache_tgt_iterator *tgt_it = NULL; | |
4365 | ||
4366 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS) | |
4367 | return -EOPNOTSUPP; | |
4368 | ||
4369 | rc = dfs_cache_noreq_find(path, NULL, &tgt_list); | |
4370 | if (rc) | |
4371 | return rc; | |
4372 | ||
4373 | for (;;) { | |
4374 | /* Get next DFS target server - if any */ | |
4375 | rc = get_next_dfs_tgt(path, &tgt_list, &tgt_it); | |
4376 | if (rc) | |
4377 | break; | |
4378 | /* Connect to next DFS target */ | |
4379 | rc = setup_dfs_tgt_conn(path, tgt_it, cifs_sb, vol, xid, server, | |
4380 | ses, tcon); | |
4381 | if (!rc || rc == -EACCES || rc == -EOPNOTSUPP) | |
4382 | break; | |
4383 | } | |
4384 | if (!rc) { | |
4385 | /* | |
4386 | * Update DFS target hint in DFS referral cache with the target | |
4387 | * server we successfully reconnected to. | |
4388 | */ | |
4389 | rc = dfs_cache_update_tgthint(*xid, root_ses ? root_ses : *ses, | |
4390 | cifs_sb->local_nls, | |
4391 | cifs_remap(cifs_sb), path, | |
4392 | tgt_it); | |
4393 | } | |
4394 | dfs_cache_free_tgts(&tgt_list); | |
4395 | return rc; | |
4396 | } | |
2d6d589d | 4397 | #endif |
1bfe73c2 | 4398 | |
5072010c | 4399 | int |
04db79b0 | 4400 | cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
c7c137b9 | 4401 | const char *devname, bool is_smb3) |
1da177e4 | 4402 | { |
724d9f1c | 4403 | int rc = 0; |
1da177e4 | 4404 | |
c7c137b9 | 4405 | if (cifs_parse_mount_options(mount_data, devname, volume_info, is_smb3)) |
04db79b0 | 4406 | return -EINVAL; |
1da177e4 | 4407 | |
7586b765 | 4408 | if (volume_info->nullauth) { |
f96637be | 4409 | cifs_dbg(FYI, "Anonymous login\n"); |
04febabc JL |
4410 | kfree(volume_info->username); |
4411 | volume_info->username = NULL; | |
7586b765 | 4412 | } else if (volume_info->username) { |
1da177e4 | 4413 | /* BB fixme parse for domain name here */ |
f96637be | 4414 | cifs_dbg(FYI, "Username: %s\n", volume_info->username); |
1da177e4 | 4415 | } else { |
f96637be | 4416 | cifs_dbg(VFS, "No username specified\n"); |
50c2f753 SF |
4417 | /* In userspace mount helper we can get user name from alternate |
4418 | locations such as env variables and files on disk */ | |
04db79b0 | 4419 | return -EINVAL; |
1da177e4 LT |
4420 | } |
4421 | ||
1da177e4 | 4422 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 4423 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
4424 | /* load_nls_default cannot return null */ |
4425 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 4426 | } else { |
a5fc4ce0 JL |
4427 | volume_info->local_nls = load_nls(volume_info->iocharset); |
4428 | if (volume_info->local_nls == NULL) { | |
f96637be | 4429 | cifs_dbg(VFS, "CIFS mount error: iocharset %s not found\n", |
b6b38f70 | 4430 | volume_info->iocharset); |
04db79b0 | 4431 | return -ELIBACC; |
1da177e4 LT |
4432 | } |
4433 | } | |
724d9f1c | 4434 | |
724d9f1c PS |
4435 | return rc; |
4436 | } | |
4437 | ||
04db79b0 | 4438 | struct smb_vol * |
c7c137b9 | 4439 | cifs_get_volume_info(char *mount_data, const char *devname, bool is_smb3) |
04db79b0 JL |
4440 | { |
4441 | int rc; | |
4442 | struct smb_vol *volume_info; | |
4443 | ||
6ee9542a | 4444 | volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL); |
04db79b0 JL |
4445 | if (!volume_info) |
4446 | return ERR_PTR(-ENOMEM); | |
4447 | ||
c7c137b9 | 4448 | rc = cifs_setup_volume_info(volume_info, mount_data, devname, is_smb3); |
04db79b0 JL |
4449 | if (rc) { |
4450 | cifs_cleanup_volume_info(volume_info); | |
4451 | volume_info = ERR_PTR(rc); | |
4452 | } | |
4453 | ||
4454 | return volume_info; | |
4455 | } | |
4456 | ||
a6b5058f AA |
4457 | static int |
4458 | cifs_are_all_path_components_accessible(struct TCP_Server_Info *server, | |
4459 | unsigned int xid, | |
4460 | struct cifs_tcon *tcon, | |
4461 | struct cifs_sb_info *cifs_sb, | |
4462 | char *full_path) | |
4463 | { | |
4464 | int rc; | |
4465 | char *s; | |
4466 | char sep, tmp; | |
4467 | ||
4468 | sep = CIFS_DIR_SEP(cifs_sb); | |
4469 | s = full_path; | |
4470 | ||
4471 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, ""); | |
4472 | while (rc == 0) { | |
4473 | /* skip separators */ | |
4474 | while (*s == sep) | |
4475 | s++; | |
4476 | if (!*s) | |
4477 | break; | |
4478 | /* next separator */ | |
4479 | while (*s && *s != sep) | |
4480 | s++; | |
4481 | ||
4482 | /* | |
4483 | * temporarily null-terminate the path at the end of | |
4484 | * the current component | |
4485 | */ | |
4486 | tmp = *s; | |
4487 | *s = 0; | |
4488 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, | |
4489 | full_path); | |
4490 | *s = tmp; | |
4491 | } | |
4492 | return rc; | |
4493 | } | |
4494 | ||
56c762eb PA |
4495 | /* |
4496 | * Check if path is remote (e.g. a DFS share). Return -EREMOTE if it is, | |
4497 | * otherwise 0. | |
4498 | */ | |
4499 | static int is_path_remote(struct cifs_sb_info *cifs_sb, struct smb_vol *vol, | |
4500 | const unsigned int xid, | |
4501 | struct TCP_Server_Info *server, | |
4502 | struct cifs_tcon *tcon) | |
724d9f1c | 4503 | { |
1daaae8f | 4504 | int rc; |
56c762eb | 4505 | char *full_path; |
dd854466 | 4506 | |
56c762eb PA |
4507 | if (!server->ops->is_path_accessible) |
4508 | return -EOPNOTSUPP; | |
724d9f1c | 4509 | |
56c762eb PA |
4510 | /* |
4511 | * cifs_build_path_to_root works only when we have a valid tcon | |
4512 | */ | |
4513 | full_path = cifs_build_path_to_root(vol, cifs_sb, tcon, | |
4514 | tcon->Flags & SMB_SHARE_IS_IN_DFS); | |
4515 | if (full_path == NULL) | |
4516 | return -ENOMEM; | |
724d9f1c | 4517 | |
56c762eb | 4518 | cifs_dbg(FYI, "%s: full_path: %s\n", __func__, full_path); |
1da177e4 | 4519 | |
56c762eb PA |
4520 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, |
4521 | full_path); | |
4522 | if (rc != 0 && rc != -EREMOTE) { | |
4523 | kfree(full_path); | |
4524 | return rc; | |
b618f001 | 4525 | } |
592fafe6 | 4526 | |
56c762eb PA |
4527 | if (rc != -EREMOTE) { |
4528 | rc = cifs_are_all_path_components_accessible(server, xid, tcon, | |
4529 | cifs_sb, | |
4530 | full_path); | |
4531 | if (rc != 0) { | |
4532 | cifs_dbg(VFS, "cannot query dirs between root and final path, " | |
4533 | "enabling CIFS_MOUNT_USE_PREFIX_PATH\n"); | |
4534 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH; | |
4535 | rc = 0; | |
4536 | } | |
d00c28de | 4537 | } |
1bfe73c2 | 4538 | |
56c762eb PA |
4539 | kfree(full_path); |
4540 | return rc; | |
4541 | } | |
ce558b0e | 4542 | |
56c762eb PA |
4543 | #ifdef CONFIG_CIFS_DFS_UPCALL |
4544 | int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *vol) | |
4545 | { | |
4546 | int rc = 0; | |
4547 | unsigned int xid; | |
4548 | struct cifs_ses *ses; | |
4a367dc0 | 4549 | struct cifs_tcon *root_tcon = NULL; |
56c762eb PA |
4550 | struct cifs_tcon *tcon = NULL; |
4551 | struct TCP_Server_Info *server; | |
4a367dc0 | 4552 | char *root_path = NULL, *full_path = NULL; |
5072010c | 4553 | char *old_mountdata, *origin_mountdata = NULL; |
56c762eb | 4554 | int count; |
c18c842b | 4555 | |
56c762eb PA |
4556 | rc = mount_get_conns(vol, cifs_sb, &xid, &server, &ses, &tcon); |
4557 | if (!rc && tcon) { | |
4a367dc0 PA |
4558 | /* If not a standalone DFS root, then check if path is remote */ |
4559 | rc = dfs_cache_find(xid, ses, cifs_sb->local_nls, | |
4560 | cifs_remap(cifs_sb), vol->UNC + 1, NULL, | |
4561 | NULL); | |
4562 | if (rc) { | |
4563 | rc = is_path_remote(cifs_sb, vol, xid, server, tcon); | |
4564 | if (!rc) | |
4565 | goto out; | |
4566 | if (rc != -EREMOTE) | |
4567 | goto error; | |
4568 | } | |
56c762eb | 4569 | } |
4a367dc0 PA |
4570 | /* |
4571 | * If first DFS target server went offline and we failed to connect it, | |
4572 | * server and ses pointers are NULL at this point, though we still have | |
4573 | * chance to get a cached DFS referral in expand_dfs_referral() and | |
4574 | * retry next target available in it. | |
4575 | * | |
4576 | * If a NULL ses ptr is passed to dfs_cache_find(), a lookup will be | |
4577 | * performed against DFS path and *no* requests will be sent to server | |
4578 | * for any new DFS referrals. Hence it's safe to skip checking whether | |
4579 | * server or ses ptr is NULL. | |
4580 | */ | |
4581 | if (rc == -EACCES || rc == -EOPNOTSUPP) | |
56c762eb | 4582 | goto error; |
6848b733 | 4583 | |
4a367dc0 PA |
4584 | root_path = build_unc_path_to_root(vol, cifs_sb, false); |
4585 | if (IS_ERR(root_path)) { | |
4586 | rc = PTR_ERR(root_path); | |
4587 | root_path = NULL; | |
4588 | goto error; | |
4589 | } | |
f7910cbd | 4590 | |
93d5cb51 PA |
4591 | full_path = build_unc_path_to_root(vol, cifs_sb, true); |
4592 | if (IS_ERR(full_path)) { | |
4593 | rc = PTR_ERR(full_path); | |
4594 | full_path = NULL; | |
4595 | goto error; | |
4596 | } | |
c1508ca2 SF |
4597 | /* |
4598 | * Perform an unconditional check for whether there are DFS | |
4599 | * referrals for this path without prefix, to provide support | |
4600 | * for DFS referrals from w2k8 servers which don't seem to respond | |
4601 | * with PATH_NOT_COVERED to requests that include the prefix. | |
4602 | * Chase the referral if found, otherwise continue normally. | |
4603 | */ | |
56c762eb PA |
4604 | old_mountdata = cifs_sb->mountdata; |
4605 | (void)expand_dfs_referral(xid, ses, vol, cifs_sb, false); | |
4606 | ||
4607 | if (cifs_sb->mountdata == NULL) { | |
4608 | rc = -ENOENT; | |
4609 | goto error; | |
c1508ca2 | 4610 | } |
c1508ca2 | 4611 | |
5072010c PAS |
4612 | /* Save DFS root volume information for DFS refresh worker */ |
4613 | origin_mountdata = kstrndup(cifs_sb->mountdata, | |
4614 | strlen(cifs_sb->mountdata), GFP_KERNEL); | |
4615 | if (!origin_mountdata) { | |
4616 | rc = -ENOMEM; | |
4617 | goto error; | |
4618 | } | |
4619 | ||
56c762eb PA |
4620 | if (cifs_sb->mountdata != old_mountdata) { |
4621 | /* If we were redirected, reconnect to new target server */ | |
4622 | mount_put_conns(cifs_sb, xid, server, ses, tcon); | |
4623 | rc = mount_get_conns(vol, cifs_sb, &xid, &server, &ses, &tcon); | |
4624 | } | |
4625 | if (rc) { | |
4626 | if (rc == -EACCES || rc == -EOPNOTSUPP) | |
4627 | goto error; | |
4a367dc0 PA |
4628 | /* Perform DFS failover to any other DFS targets */ |
4629 | rc = mount_do_dfs_failover(root_path + 1, cifs_sb, vol, NULL, | |
4630 | &xid, &server, &ses, &tcon); | |
4631 | if (rc) | |
4632 | goto error; | |
56c762eb PA |
4633 | } |
4634 | ||
4a367dc0 PA |
4635 | kfree(root_path); |
4636 | root_path = build_unc_path_to_root(vol, cifs_sb, false); | |
4637 | if (IS_ERR(root_path)) { | |
4638 | rc = PTR_ERR(root_path); | |
4639 | root_path = NULL; | |
4640 | goto error; | |
4641 | } | |
4642 | /* Cache out resolved root server */ | |
4643 | (void)dfs_cache_find(xid, ses, cifs_sb->local_nls, cifs_remap(cifs_sb), | |
4644 | root_path + 1, NULL, NULL); | |
4645 | /* | |
4646 | * Save root tcon for additional DFS requests to update or create a new | |
4647 | * DFS cache entry, or even perform DFS failover. | |
4648 | */ | |
4649 | spin_lock(&cifs_tcp_ses_lock); | |
4650 | tcon->tc_count++; | |
4651 | tcon->dfs_path = root_path; | |
4652 | root_path = NULL; | |
4653 | tcon->remap = cifs_remap(cifs_sb); | |
4654 | spin_unlock(&cifs_tcp_ses_lock); | |
4655 | ||
4656 | root_tcon = tcon; | |
4657 | ||
56c762eb PA |
4658 | for (count = 1; ;) { |
4659 | if (!rc && tcon) { | |
4660 | rc = is_path_remote(cifs_sb, vol, xid, server, tcon); | |
4661 | if (!rc || rc != -EREMOTE) | |
4662 | break; | |
68889f26 | 4663 | } |
6d3ea7e4 | 4664 | /* |
56c762eb PA |
4665 | * BB: when we implement proper loop detection, |
4666 | * we will remove this check. But now we need it | |
4667 | * to prevent an indefinite loop if 'DFS tree' is | |
4668 | * misconfigured (i.e. has loops). | |
6d3ea7e4 | 4669 | */ |
56c762eb | 4670 | if (count++ > MAX_NESTED_LINKS) { |
5c2503a8 | 4671 | rc = -ELOOP; |
56c762eb | 4672 | break; |
5c2503a8 | 4673 | } |
1bfe73c2 | 4674 | |
4a367dc0 PA |
4675 | kfree(full_path); |
4676 | full_path = build_unc_path_to_root(vol, cifs_sb, true); | |
4677 | if (IS_ERR(full_path)) { | |
4678 | rc = PTR_ERR(full_path); | |
4679 | full_path = NULL; | |
4680 | break; | |
4681 | } | |
4682 | ||
56c762eb | 4683 | old_mountdata = cifs_sb->mountdata; |
4a367dc0 | 4684 | rc = expand_dfs_referral(xid, root_tcon->ses, vol, cifs_sb, |
56c762eb PA |
4685 | true); |
4686 | if (rc) | |
4687 | break; | |
7b91e266 | 4688 | |
56c762eb PA |
4689 | if (cifs_sb->mountdata != old_mountdata) { |
4690 | mount_put_conns(cifs_sb, xid, server, ses, tcon); | |
4691 | rc = mount_get_conns(vol, cifs_sb, &xid, &server, &ses, | |
4692 | &tcon); | |
4693 | } | |
4694 | if (rc) { | |
4a367dc0 PA |
4695 | if (rc == -EACCES || rc == -EOPNOTSUPP) |
4696 | break; | |
4697 | /* Perform DFS failover to any other DFS targets */ | |
4698 | rc = mount_do_dfs_failover(full_path + 1, cifs_sb, vol, | |
4699 | root_tcon->ses, &xid, | |
4700 | &server, &ses, &tcon); | |
56c762eb PA |
4701 | if (rc == -EACCES || rc == -EOPNOTSUPP || !server || |
4702 | !ses) | |
4703 | goto error; | |
1bfe73c2 IM |
4704 | } |
4705 | } | |
4a367dc0 | 4706 | cifs_put_tcon(root_tcon); |
1bfe73c2 | 4707 | |
9d002df4 | 4708 | if (rc) |
56c762eb | 4709 | goto error; |
9d002df4 | 4710 | |
93d5cb51 PA |
4711 | spin_lock(&cifs_tcp_ses_lock); |
4712 | if (!tcon->dfs_path) { | |
4713 | /* Save full path in new tcon to do failover when reconnecting tcons */ | |
4714 | tcon->dfs_path = full_path; | |
4715 | full_path = NULL; | |
4716 | tcon->remap = cifs_remap(cifs_sb); | |
4717 | } | |
4718 | cifs_sb->origin_fullpath = kstrndup(tcon->dfs_path, | |
2f0a6174 Y |
4719 | strlen(tcon->dfs_path), |
4720 | GFP_ATOMIC); | |
93d5cb51 PA |
4721 | if (!cifs_sb->origin_fullpath) { |
4722 | spin_unlock(&cifs_tcp_ses_lock); | |
4723 | rc = -ENOMEM; | |
4724 | goto error; | |
4725 | } | |
4726 | spin_unlock(&cifs_tcp_ses_lock); | |
4727 | ||
5072010c | 4728 | rc = dfs_cache_add_vol(origin_mountdata, vol, cifs_sb->origin_fullpath); |
e511d317 PA |
4729 | if (rc) { |
4730 | kfree(cifs_sb->origin_fullpath); | |
4731 | goto error; | |
4732 | } | |
5fc7fcd0 AA |
4733 | /* |
4734 | * After reconnecting to a different server, unique ids won't | |
4735 | * match anymore, so we disable serverino. This prevents | |
4736 | * dentry revalidation to think the dentry are stale (ESTALE). | |
4737 | */ | |
4738 | cifs_autodisable_serverino(cifs_sb); | |
56c762eb PA |
4739 | out: |
4740 | free_xid(xid); | |
4741 | return mount_setup_tlink(cifs_sb, ses, tcon); | |
9d002df4 | 4742 | |
56c762eb | 4743 | error: |
4a367dc0 PA |
4744 | kfree(full_path); |
4745 | kfree(root_path); | |
5072010c | 4746 | kfree(origin_mountdata); |
56c762eb PA |
4747 | mount_put_conns(cifs_sb, xid, server, ses, tcon); |
4748 | return rc; | |
4749 | } | |
4750 | #else | |
4751 | int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *vol) | |
4752 | { | |
4753 | int rc = 0; | |
4754 | unsigned int xid; | |
4755 | struct cifs_ses *ses; | |
4756 | struct cifs_tcon *tcon; | |
4757 | struct TCP_Server_Info *server; | |
413e661c | 4758 | |
56c762eb PA |
4759 | rc = mount_get_conns(vol, cifs_sb, &xid, &server, &ses, &tcon); |
4760 | if (rc) | |
4761 | goto error; | |
2de970ff | 4762 | |
56c762eb PA |
4763 | if (tcon) { |
4764 | rc = is_path_remote(cifs_sb, vol, xid, server, tcon); | |
4765 | if (rc == -EREMOTE) | |
4766 | rc = -EOPNOTSUPP; | |
4767 | if (rc) | |
4768 | goto error; | |
1bfe73c2 IM |
4769 | } |
4770 | ||
6d5786a3 | 4771 | free_xid(xid); |
56c762eb PA |
4772 | |
4773 | return mount_setup_tlink(cifs_sb, ses, tcon); | |
4774 | ||
4775 | error: | |
4776 | mount_put_conns(cifs_sb, xid, server, ses, tcon); | |
1da177e4 LT |
4777 | return rc; |
4778 | } | |
56c762eb | 4779 | #endif |
1da177e4 | 4780 | |
8d1bca32 | 4781 | /* |
b327a717 | 4782 | * Issue a TREE_CONNECT request. |
8d1bca32 | 4783 | */ |
1da177e4 | 4784 | int |
2e6e02ab | 4785 | CIFSTCon(const unsigned int xid, struct cifs_ses *ses, |
96daf2b0 | 4786 | const char *tree, struct cifs_tcon *tcon, |
1da177e4 LT |
4787 | const struct nls_table *nls_codepage) |
4788 | { | |
4789 | struct smb_hdr *smb_buffer; | |
4790 | struct smb_hdr *smb_buffer_response; | |
4791 | TCONX_REQ *pSMB; | |
4792 | TCONX_RSP *pSMBr; | |
4793 | unsigned char *bcc_ptr; | |
4794 | int rc = 0; | |
690c522f JL |
4795 | int length; |
4796 | __u16 bytes_left, count; | |
1da177e4 LT |
4797 | |
4798 | if (ses == NULL) | |
4799 | return -EIO; | |
4800 | ||
4801 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 4802 | if (smb_buffer == NULL) |
1da177e4 | 4803 | return -ENOMEM; |
ca43e3be | 4804 | |
1da177e4 LT |
4805 | smb_buffer_response = smb_buffer; |
4806 | ||
4807 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
4808 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 | 4809 | |
88257360 | 4810 | smb_buffer->Mid = get_next_mid(ses->server); |
1da177e4 LT |
4811 | smb_buffer->Uid = ses->Suid; |
4812 | pSMB = (TCONX_REQ *) smb_buffer; | |
4813 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
4814 | ||
4815 | pSMB->AndXCommand = 0xFF; | |
4816 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 4817 | bcc_ptr = &pSMB->Password[0]; |
b327a717 | 4818 | if (tcon->pipe || (ses->server->sec_mode & SECMODE_USER)) { |
eeac8047 | 4819 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 4820 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 4821 | bcc_ptr++; /* skip password */ |
7c7b25bc | 4822 | /* already aligned so no need to do it below */ |
eeac8047 | 4823 | } else { |
540b2e37 | 4824 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
4825 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
4826 | specified as required (when that support is added to | |
4827 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 4828 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
4829 | by Samba (not sure whether other servers allow |
4830 | NTLMv2 password here) */ | |
7c7b25bc | 4831 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 4832 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
3f618223 | 4833 | (ses->sectype == LANMAN)) |
d3ba50b1 | 4834 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
96daf2b0 | 4835 | ses->server->sec_mode & |
4e53a3fb JL |
4836 | SECMODE_PW_ENCRYPT ? true : false, |
4837 | bcc_ptr); | |
7c7b25bc SF |
4838 | else |
4839 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 | 4840 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
9ef5992e | 4841 | bcc_ptr, nls_codepage); |
f3a31a2b SF |
4842 | if (rc) { |
4843 | cifs_dbg(FYI, "%s Can't generate NTLM rsp. Error: %d\n", | |
4844 | __func__, rc); | |
4845 | cifs_buf_release(smb_buffer); | |
4846 | return rc; | |
4847 | } | |
eeac8047 | 4848 | |
540b2e37 | 4849 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 4850 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
4851 | /* must align unicode strings */ |
4852 | *bcc_ptr = 0; /* null byte password */ | |
4853 | bcc_ptr++; | |
4854 | } | |
eeac8047 | 4855 | } |
1da177e4 | 4856 | |
38d77c50 | 4857 | if (ses->server->sign) |
1da177e4 LT |
4858 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
4859 | ||
4860 | if (ses->capabilities & CAP_STATUS32) { | |
4861 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
4862 | } | |
4863 | if (ses->capabilities & CAP_DFS) { | |
4864 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
4865 | } | |
4866 | if (ses->capabilities & CAP_UNICODE) { | |
4867 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
4868 | length = | |
acbbb76a | 4869 | cifs_strtoUTF16((__le16 *) bcc_ptr, tree, |
50c2f753 | 4870 | 6 /* max utf8 char length in bytes */ * |
a878fb22 SF |
4871 | (/* server len*/ + 256 /* share len */), nls_codepage); |
4872 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
4873 | bcc_ptr += 2; /* skip trailing null */ |
4874 | } else { /* ASCII */ | |
1da177e4 LT |
4875 | strcpy(bcc_ptr, tree); |
4876 | bcc_ptr += strlen(tree) + 1; | |
4877 | } | |
4878 | strcpy(bcc_ptr, "?????"); | |
4879 | bcc_ptr += strlen("?????"); | |
4880 | bcc_ptr += 1; | |
4881 | count = bcc_ptr - &pSMB->Password[0]; | |
be8e3b00 SF |
4882 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
4883 | pSMB->hdr.smb_buf_length) + count); | |
1da177e4 LT |
4884 | pSMB->ByteCount = cpu_to_le16(count); |
4885 | ||
133672ef | 4886 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 4887 | 0); |
1da177e4 | 4888 | |
1da177e4 | 4889 | /* above now done in SendReceive */ |
b327a717 | 4890 | if (rc == 0) { |
0e0d2cf3 SF |
4891 | bool is_unicode; |
4892 | ||
1da177e4 | 4893 | tcon->tidStatus = CifsGood; |
3b795210 | 4894 | tcon->need_reconnect = false; |
1da177e4 LT |
4895 | tcon->tid = smb_buffer_response->Tid; |
4896 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 4897 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 4898 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
4899 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
4900 | is_unicode = true; | |
4901 | else | |
4902 | is_unicode = false; | |
4903 | ||
cc20c031 | 4904 | |
50c2f753 | 4905 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
4906 | if (length == 3) { |
4907 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
4908 | (bcc_ptr[2] == 'C')) { | |
f96637be | 4909 | cifs_dbg(FYI, "IPC connection\n"); |
b327a717 AA |
4910 | tcon->ipc = true; |
4911 | tcon->pipe = true; | |
7f8ed420 SF |
4912 | } |
4913 | } else if (length == 2) { | |
4914 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
4915 | /* the most common case */ | |
f96637be | 4916 | cifs_dbg(FYI, "disk share connection\n"); |
7f8ed420 SF |
4917 | } |
4918 | } | |
50c2f753 | 4919 | bcc_ptr += length + 1; |
cc20c031 | 4920 | bytes_left -= (length + 1); |
46b51d08 | 4921 | strlcpy(tcon->treeName, tree, sizeof(tcon->treeName)); |
cc20c031 JL |
4922 | |
4923 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 4924 | kfree(tcon->nativeFileSystem); |
acbbb76a | 4925 | tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr, |
0e0d2cf3 | 4926 | bytes_left, is_unicode, |
cc20c031 JL |
4927 | nls_codepage); |
4928 | ||
f96637be | 4929 | cifs_dbg(FYI, "nativeFileSystem=%s\n", tcon->nativeFileSystem); |
cc20c031 | 4930 | |
fb8c4b14 | 4931 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
4932 | (smb_buffer_response->WordCount == 7)) |
4933 | /* field is in same location */ | |
3979877e SF |
4934 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
4935 | else | |
4936 | tcon->Flags = 0; | |
f96637be | 4937 | cifs_dbg(FYI, "Tcon flags: 0x%x\n", tcon->Flags); |
1da177e4 LT |
4938 | } |
4939 | ||
a8a11d39 | 4940 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
4941 | return rc; |
4942 | } | |
4943 | ||
2e32cf5e AV |
4944 | static void delayed_free(struct rcu_head *p) |
4945 | { | |
4946 | struct cifs_sb_info *sbi = container_of(p, struct cifs_sb_info, rcu); | |
4947 | unload_nls(sbi->local_nls); | |
4948 | kfree(sbi); | |
4949 | } | |
4950 | ||
2a9b9951 AV |
4951 | void |
4952 | cifs_umount(struct cifs_sb_info *cifs_sb) | |
1da177e4 | 4953 | { |
b647c35f JL |
4954 | struct rb_root *root = &cifs_sb->tlink_tree; |
4955 | struct rb_node *node; | |
4956 | struct tcon_link *tlink; | |
9d002df4 | 4957 | |
2de970ff JL |
4958 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
4959 | ||
b647c35f JL |
4960 | spin_lock(&cifs_sb->tlink_tree_lock); |
4961 | while ((node = rb_first(root))) { | |
4962 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
4963 | cifs_get_tlink(tlink); | |
4964 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4965 | rb_erase(node, root); | |
1da177e4 | 4966 | |
b647c35f JL |
4967 | spin_unlock(&cifs_sb->tlink_tree_lock); |
4968 | cifs_put_tlink(tlink); | |
4969 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4970 | } | |
4971 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 4972 | |
d757d71b | 4973 | kfree(cifs_sb->mountdata); |
a6b5058f | 4974 | kfree(cifs_sb->prepath); |
93d5cb51 | 4975 | #ifdef CONFIG_CIFS_DFS_UPCALL |
e511d317 | 4976 | dfs_cache_del_vol(cifs_sb->origin_fullpath); |
93d5cb51 PA |
4977 | kfree(cifs_sb->origin_fullpath); |
4978 | #endif | |
2e32cf5e | 4979 | call_rcu(&cifs_sb->rcu, delayed_free); |
50c2f753 | 4980 | } |
1da177e4 | 4981 | |
286170aa PS |
4982 | int |
4983 | cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses) | |
1da177e4 LT |
4984 | { |
4985 | int rc = 0; | |
198b5682 | 4986 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 4987 | |
286170aa PS |
4988 | if (!server->ops->need_neg || !server->ops->negotiate) |
4989 | return -ENOSYS; | |
4990 | ||
198b5682 | 4991 | /* only send once per connect */ |
286170aa | 4992 | if (!server->ops->need_neg(server)) |
198b5682 JL |
4993 | return 0; |
4994 | ||
286170aa | 4995 | rc = server->ops->negotiate(xid, ses); |
198b5682 JL |
4996 | if (rc == 0) { |
4997 | spin_lock(&GlobalMid_Lock); | |
7fdbaa1b | 4998 | if (server->tcpStatus == CifsNeedNegotiate) |
198b5682 JL |
4999 | server->tcpStatus = CifsGood; |
5000 | else | |
5001 | rc = -EHOSTDOWN; | |
5002 | spin_unlock(&GlobalMid_Lock); | |
198b5682 JL |
5003 | } |
5004 | ||
5005 | return rc; | |
5006 | } | |
5007 | ||
58c45c58 PS |
5008 | int |
5009 | cifs_setup_session(const unsigned int xid, struct cifs_ses *ses, | |
5010 | struct nls_table *nls_info) | |
198b5682 | 5011 | { |
58c45c58 | 5012 | int rc = -ENOSYS; |
198b5682 | 5013 | struct TCP_Server_Info *server = ses->server; |
26b994fa | 5014 | |
198b5682 | 5015 | ses->capabilities = server->capabilities; |
26b994fa | 5016 | if (linuxExtEnabled == 0) |
29e20f9c | 5017 | ses->capabilities &= (~server->vals->cap_unix); |
20418acd | 5018 | |
f96637be | 5019 | cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n", |
96daf2b0 | 5020 | server->sec_mode, server->capabilities, server->timeAdj); |
cb7691b6 | 5021 | |
f5c4ba81 | 5022 | if (ses->auth_key.response) { |
2a18287b | 5023 | cifs_dbg(FYI, "Free previous auth_key.response = %p\n", |
f5c4ba81 SW |
5024 | ses->auth_key.response); |
5025 | kfree(ses->auth_key.response); | |
5026 | ses->auth_key.response = NULL; | |
5027 | ses->auth_key.len = 0; | |
5028 | } | |
5029 | ||
58c45c58 PS |
5030 | if (server->ops->sess_setup) |
5031 | rc = server->ops->sess_setup(xid, ses, nls_info); | |
5032 | ||
d4e63bd6 | 5033 | if (rc) |
f96637be | 5034 | cifs_dbg(VFS, "Send error in SessSetup = %d\n", rc); |
21e73393 | 5035 | |
1da177e4 LT |
5036 | return rc; |
5037 | } | |
5038 | ||
8a8798a5 JL |
5039 | static int |
5040 | cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses) | |
5041 | { | |
3f618223 JL |
5042 | vol->sectype = ses->sectype; |
5043 | ||
5044 | /* krb5 is special, since we don't need username or pw */ | |
5045 | if (vol->sectype == Kerberos) | |
8a8798a5 | 5046 | return 0; |
8a8798a5 JL |
5047 | |
5048 | return cifs_set_cifscreds(vol, ses); | |
5049 | } | |
5050 | ||
96daf2b0 | 5051 | static struct cifs_tcon * |
6d4a0832 | 5052 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid) |
9d002df4 | 5053 | { |
8a8798a5 | 5054 | int rc; |
96daf2b0 SF |
5055 | struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); |
5056 | struct cifs_ses *ses; | |
5057 | struct cifs_tcon *tcon = NULL; | |
9d002df4 | 5058 | struct smb_vol *vol_info; |
9d002df4 JL |
5059 | |
5060 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
803ab977 DC |
5061 | if (vol_info == NULL) |
5062 | return ERR_PTR(-ENOMEM); | |
9d002df4 | 5063 | |
9d002df4 JL |
5064 | vol_info->local_nls = cifs_sb->local_nls; |
5065 | vol_info->linux_uid = fsuid; | |
5066 | vol_info->cred_uid = fsuid; | |
5067 | vol_info->UNC = master_tcon->treeName; | |
5068 | vol_info->retry = master_tcon->retry; | |
5069 | vol_info->nocase = master_tcon->nocase; | |
3d4ef9a1 | 5070 | vol_info->nohandlecache = master_tcon->nohandlecache; |
9d002df4 JL |
5071 | vol_info->local_lease = master_tcon->local_lease; |
5072 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
28e11bd8 JL |
5073 | vol_info->sectype = master_tcon->ses->sectype; |
5074 | vol_info->sign = master_tcon->ses->sign; | |
9d002df4 | 5075 | |
8a8798a5 JL |
5076 | rc = cifs_set_vol_auth(vol_info, master_tcon->ses); |
5077 | if (rc) { | |
5078 | tcon = ERR_PTR(rc); | |
5079 | goto out; | |
5080 | } | |
9d002df4 JL |
5081 | |
5082 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 5083 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 5084 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 5085 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
5086 | |
5087 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
5088 | if (IS_ERR(ses)) { | |
96daf2b0 | 5089 | tcon = (struct cifs_tcon *)ses; |
53e0e11e | 5090 | cifs_put_tcp_session(master_tcon->ses->server, 0); |
9d002df4 JL |
5091 | goto out; |
5092 | } | |
5093 | ||
5094 | tcon = cifs_get_tcon(ses, vol_info); | |
5095 | if (IS_ERR(tcon)) { | |
5096 | cifs_put_smb_ses(ses); | |
5097 | goto out; | |
5098 | } | |
5099 | ||
ce558b0e SF |
5100 | /* if new SMB3.11 POSIX extensions are supported do not remap / and \ */ |
5101 | if (tcon->posix_extensions) | |
5102 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_POSIX_PATHS; | |
0fdfef9a | 5103 | |
29e20f9c | 5104 | if (cap_unix(ses)) |
9d002df4 | 5105 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); |
b326614e | 5106 | |
9d002df4 | 5107 | out: |
8a8798a5 | 5108 | kfree(vol_info->username); |
97f4b727 | 5109 | kzfree(vol_info->password); |
9d002df4 JL |
5110 | kfree(vol_info); |
5111 | ||
5112 | return tcon; | |
5113 | } | |
5114 | ||
96daf2b0 | 5115 | struct cifs_tcon * |
9d002df4 JL |
5116 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) |
5117 | { | |
5118 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
5119 | } | |
5120 | ||
b647c35f JL |
5121 | /* find and return a tlink with given uid */ |
5122 | static struct tcon_link * | |
6d4a0832 | 5123 | tlink_rb_search(struct rb_root *root, kuid_t uid) |
b647c35f JL |
5124 | { |
5125 | struct rb_node *node = root->rb_node; | |
5126 | struct tcon_link *tlink; | |
5127 | ||
5128 | while (node) { | |
5129 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
5130 | ||
6d4a0832 | 5131 | if (uid_gt(tlink->tl_uid, uid)) |
b647c35f | 5132 | node = node->rb_left; |
6d4a0832 | 5133 | else if (uid_lt(tlink->tl_uid, uid)) |
b647c35f JL |
5134 | node = node->rb_right; |
5135 | else | |
5136 | return tlink; | |
5137 | } | |
5138 | return NULL; | |
5139 | } | |
5140 | ||
5141 | /* insert a tcon_link into the tree */ | |
5142 | static void | |
5143 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
5144 | { | |
5145 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
5146 | struct tcon_link *tlink; | |
5147 | ||
5148 | while (*new) { | |
5149 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
5150 | parent = *new; | |
5151 | ||
6d4a0832 | 5152 | if (uid_gt(tlink->tl_uid, new_tlink->tl_uid)) |
b647c35f JL |
5153 | new = &((*new)->rb_left); |
5154 | else | |
5155 | new = &((*new)->rb_right); | |
5156 | } | |
5157 | ||
5158 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
5159 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
5160 | } | |
5161 | ||
9d002df4 JL |
5162 | /* |
5163 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
5164 | * current task. | |
5165 | * | |
5166 | * If the superblock doesn't refer to a multiuser mount, then just return | |
5167 | * the master tcon for the mount. | |
5168 | * | |
6ef933a3 | 5169 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
5170 | * exists, then check to see if it's pending construction. If it is then wait |
5171 | * for construction to complete. Once it's no longer pending, check to see if | |
5172 | * it failed and either return an error or retry construction, depending on | |
5173 | * the timeout. | |
5174 | * | |
5175 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
5176 | * try to construct a new one. | |
5177 | */ | |
5178 | struct tcon_link * | |
5179 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
5180 | { | |
5181 | int ret; | |
6d4a0832 | 5182 | kuid_t fsuid = current_fsuid(); |
9d002df4 JL |
5183 | struct tcon_link *tlink, *newtlink; |
5184 | ||
5185 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
5186 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
5187 | ||
5188 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 5189 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
5190 | if (tlink) |
5191 | cifs_get_tlink(tlink); | |
5192 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
5193 | ||
5194 | if (tlink == NULL) { | |
5195 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
5196 | if (newtlink == NULL) | |
5197 | return ERR_PTR(-ENOMEM); | |
b647c35f | 5198 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
5199 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
5200 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
5201 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
5202 | cifs_get_tlink(newtlink); | |
5203 | ||
9d002df4 JL |
5204 | spin_lock(&cifs_sb->tlink_tree_lock); |
5205 | /* was one inserted after previous search? */ | |
b647c35f | 5206 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
5207 | if (tlink) { |
5208 | cifs_get_tlink(tlink); | |
5209 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
5210 | kfree(newtlink); |
5211 | goto wait_for_construction; | |
5212 | } | |
9d002df4 | 5213 | tlink = newtlink; |
b647c35f JL |
5214 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
5215 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
5216 | } else { |
5217 | wait_for_construction: | |
5218 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
9d002df4 JL |
5219 | TASK_INTERRUPTIBLE); |
5220 | if (ret) { | |
5221 | cifs_put_tlink(tlink); | |
74316201 | 5222 | return ERR_PTR(-ERESTARTSYS); |
9d002df4 JL |
5223 | } |
5224 | ||
5225 | /* if it's good, return it */ | |
5226 | if (!IS_ERR(tlink->tl_tcon)) | |
5227 | return tlink; | |
5228 | ||
5229 | /* return error if we tried this already recently */ | |
5230 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
5231 | cifs_put_tlink(tlink); | |
5232 | return ERR_PTR(-EACCES); | |
5233 | } | |
5234 | ||
5235 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
5236 | goto wait_for_construction; | |
5237 | } | |
5238 | ||
5239 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
5240 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
5241 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
5242 | ||
5243 | if (IS_ERR(tlink->tl_tcon)) { | |
5244 | cifs_put_tlink(tlink); | |
5245 | return ERR_PTR(-EACCES); | |
5246 | } | |
5247 | ||
5248 | return tlink; | |
5249 | } | |
2de970ff JL |
5250 | |
5251 | /* | |
5252 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
5253 | * out tcons. | |
5254 | */ | |
5255 | static void | |
5256 | cifs_prune_tlinks(struct work_struct *work) | |
5257 | { | |
5258 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
5259 | prune_tlinks.work); | |
b647c35f | 5260 | struct rb_root *root = &cifs_sb->tlink_tree; |
37e12f55 | 5261 | struct rb_node *node; |
b647c35f JL |
5262 | struct rb_node *tmp; |
5263 | struct tcon_link *tlink; | |
2de970ff | 5264 | |
b647c35f JL |
5265 | /* |
5266 | * Because we drop the spinlock in the loop in order to put the tlink | |
5267 | * it's not guarded against removal of links from the tree. The only | |
5268 | * places that remove entries from the tree are this function and | |
5269 | * umounts. Because this function is non-reentrant and is canceled | |
5270 | * before umount can proceed, this is safe. | |
5271 | */ | |
5272 | spin_lock(&cifs_sb->tlink_tree_lock); | |
5273 | node = rb_first(root); | |
5274 | while (node != NULL) { | |
5275 | tmp = node; | |
5276 | node = rb_next(tmp); | |
5277 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
5278 | ||
5279 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
5280 | atomic_read(&tlink->tl_count) != 0 || | |
5281 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
5282 | continue; | |
2de970ff | 5283 | |
b647c35f JL |
5284 | cifs_get_tlink(tlink); |
5285 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
5286 | rb_erase(tmp, root); | |
5287 | ||
5288 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
5289 | cifs_put_tlink(tlink); | |
5290 | spin_lock(&cifs_sb->tlink_tree_lock); | |
5291 | } | |
5292 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff | 5293 | |
da472fc8 | 5294 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
5295 | TLINK_IDLE_EXPIRE); |
5296 | } |