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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, |
3e7a02d4 | 77 | Opt_noblocksend, Opt_noautotune, Opt_nolease, |
8830d7e0 | 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, | |
4f5c10f1 | 94 | Opt_sign, Opt_ignore_signature, 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, |
8eecd1c2 | 99 | Opt_domainauto, Opt_rdma, Opt_modesid, Opt_rootfs, |
bcc88801 | 100 | Opt_multichannel, Opt_nomultichannel, |
9fe5ff1c | 101 | Opt_compress, |
8830d7e0 SP |
102 | |
103 | /* Mount options which take numeric value */ | |
104 | Opt_backupuid, Opt_backupgid, Opt_uid, | |
105 | Opt_cruid, Opt_gid, Opt_file_mode, | |
106 | Opt_dirmode, Opt_port, | |
563317ec | 107 | Opt_min_enc_offload, |
e8506d25 | 108 | Opt_blocksize, Opt_rsize, Opt_wsize, Opt_actimeo, |
ca567eb2 | 109 | Opt_echo_interval, Opt_max_credits, Opt_handletimeout, |
bcc88801 | 110 | Opt_snapshot, Opt_max_channels, |
8830d7e0 SP |
111 | |
112 | /* Mount options which take string value */ | |
113 | Opt_user, Opt_pass, Opt_ip, | |
73a999fa | 114 | Opt_domain, Opt_srcaddr, Opt_iocharset, |
8830d7e0 | 115 | Opt_netbiosname, Opt_servern, |
23db65f5 | 116 | Opt_ver, Opt_vers, Opt_sec, Opt_cache, |
8830d7e0 SP |
117 | |
118 | /* Mount options to be ignored */ | |
119 | Opt_ignore, | |
120 | ||
121 | /* Options which could be blank */ | |
122 | Opt_blank_pass, | |
4fe9e963 SP |
123 | Opt_blank_user, |
124 | Opt_blank_ip, | |
8830d7e0 SP |
125 | |
126 | Opt_err | |
127 | }; | |
128 | ||
129 | static const match_table_t cifs_mount_option_tokens = { | |
130 | ||
131 | { Opt_user_xattr, "user_xattr" }, | |
132 | { Opt_nouser_xattr, "nouser_xattr" }, | |
133 | { Opt_forceuid, "forceuid" }, | |
134 | { Opt_noforceuid, "noforceuid" }, | |
72bd481f JL |
135 | { Opt_forcegid, "forcegid" }, |
136 | { Opt_noforcegid, "noforcegid" }, | |
8830d7e0 SP |
137 | { Opt_noblocksend, "noblocksend" }, |
138 | { Opt_noautotune, "noautotune" }, | |
3e7a02d4 | 139 | { Opt_nolease, "nolease" }, |
8830d7e0 SP |
140 | { Opt_hard, "hard" }, |
141 | { Opt_soft, "soft" }, | |
142 | { Opt_perm, "perm" }, | |
143 | { Opt_noperm, "noperm" }, | |
2baa2682 | 144 | { Opt_mapchars, "mapchars" }, /* SFU style */ |
8830d7e0 | 145 | { Opt_nomapchars, "nomapchars" }, |
2baa2682 SF |
146 | { Opt_mapposix, "mapposix" }, /* SFM style */ |
147 | { Opt_nomapposix, "nomapposix" }, | |
8830d7e0 SP |
148 | { Opt_sfu, "sfu" }, |
149 | { Opt_nosfu, "nosfu" }, | |
150 | { Opt_nodfs, "nodfs" }, | |
151 | { Opt_posixpaths, "posixpaths" }, | |
152 | { Opt_noposixpaths, "noposixpaths" }, | |
153 | { Opt_nounix, "nounix" }, | |
154 | { Opt_nounix, "nolinux" }, | |
b326614e SF |
155 | { Opt_nounix, "noposix" }, |
156 | { Opt_unix, "unix" }, | |
157 | { Opt_unix, "linux" }, | |
158 | { Opt_unix, "posix" }, | |
8830d7e0 SP |
159 | { Opt_nocase, "nocase" }, |
160 | { Opt_nocase, "ignorecase" }, | |
161 | { Opt_brl, "brl" }, | |
162 | { Opt_nobrl, "nobrl" }, | |
3d4ef9a1 SF |
163 | { Opt_handlecache, "handlecache" }, |
164 | { Opt_nohandlecache, "nohandlecache" }, | |
8830d7e0 SP |
165 | { Opt_nobrl, "nolock" }, |
166 | { Opt_forcemandatorylock, "forcemandatorylock" }, | |
5cfdddcf | 167 | { Opt_forcemandatorylock, "forcemand" }, |
8830d7e0 SP |
168 | { Opt_setuids, "setuids" }, |
169 | { Opt_nosetuids, "nosetuids" }, | |
95932655 | 170 | { Opt_setuidfromacl, "idsfromsid" }, |
8830d7e0 SP |
171 | { Opt_dynperm, "dynperm" }, |
172 | { Opt_nodynperm, "nodynperm" }, | |
173 | { Opt_nohard, "nohard" }, | |
174 | { Opt_nosoft, "nosoft" }, | |
175 | { Opt_nointr, "nointr" }, | |
176 | { Opt_intr, "intr" }, | |
177 | { Opt_nostrictsync, "nostrictsync" }, | |
178 | { Opt_strictsync, "strictsync" }, | |
179 | { Opt_serverino, "serverino" }, | |
180 | { Opt_noserverino, "noserverino" }, | |
181 | { Opt_rwpidforward, "rwpidforward" }, | |
412094a8 | 182 | { Opt_modesid, "modefromsid" }, |
8830d7e0 SP |
183 | { Opt_cifsacl, "cifsacl" }, |
184 | { Opt_nocifsacl, "nocifsacl" }, | |
185 | { Opt_acl, "acl" }, | |
186 | { Opt_noacl, "noacl" }, | |
187 | { Opt_locallease, "locallease" }, | |
188 | { Opt_sign, "sign" }, | |
4f5c10f1 | 189 | { Opt_ignore_signature, "signloosely" }, |
8830d7e0 | 190 | { Opt_seal, "seal" }, |
8830d7e0 SP |
191 | { Opt_noac, "noac" }, |
192 | { Opt_fsc, "fsc" }, | |
193 | { Opt_mfsymlinks, "mfsymlinks" }, | |
194 | { Opt_multiuser, "multiuser" }, | |
d8162558 | 195 | { Opt_sloppy, "sloppy" }, |
a0b3df5c | 196 | { Opt_nosharesock, "nosharesock" }, |
b2a30774 SF |
197 | { Opt_persistent, "persistenthandles"}, |
198 | { Opt_nopersistent, "nopersistenthandles"}, | |
592fafe6 SF |
199 | { Opt_resilient, "resilienthandles"}, |
200 | { Opt_noresilient, "noresilienthandles"}, | |
39566443 | 201 | { Opt_domainauto, "domainauto"}, |
8339dd32 | 202 | { Opt_rdma, "rdma"}, |
bcc88801 AA |
203 | { Opt_multichannel, "multichannel" }, |
204 | { Opt_nomultichannel, "nomultichannel" }, | |
8830d7e0 SP |
205 | |
206 | { Opt_backupuid, "backupuid=%s" }, | |
207 | { Opt_backupgid, "backupgid=%s" }, | |
208 | { Opt_uid, "uid=%s" }, | |
209 | { Opt_cruid, "cruid=%s" }, | |
210 | { Opt_gid, "gid=%s" }, | |
211 | { Opt_file_mode, "file_mode=%s" }, | |
212 | { Opt_dirmode, "dirmode=%s" }, | |
213 | { Opt_dirmode, "dir_mode=%s" }, | |
214 | { Opt_port, "port=%s" }, | |
563317ec | 215 | { Opt_min_enc_offload, "esize=%s" }, |
e8506d25 | 216 | { Opt_blocksize, "bsize=%s" }, |
8830d7e0 SP |
217 | { Opt_rsize, "rsize=%s" }, |
218 | { Opt_wsize, "wsize=%s" }, | |
219 | { Opt_actimeo, "actimeo=%s" }, | |
ca567eb2 | 220 | { Opt_handletimeout, "handletimeout=%s" }, |
adfeb3e0 | 221 | { Opt_echo_interval, "echo_interval=%s" }, |
141891f4 | 222 | { Opt_max_credits, "max_credits=%s" }, |
8b217fe7 | 223 | { Opt_snapshot, "snapshot=%s" }, |
bcc88801 | 224 | { Opt_max_channels, "max_channels=%s" }, |
9fe5ff1c | 225 | { Opt_compress, "compress=%s" }, |
8830d7e0 | 226 | |
4fe9e963 SP |
227 | { Opt_blank_user, "user=" }, |
228 | { Opt_blank_user, "username=" }, | |
8830d7e0 SP |
229 | { Opt_user, "user=%s" }, |
230 | { Opt_user, "username=%s" }, | |
231 | { Opt_blank_pass, "pass=" }, | |
3c15b4cf | 232 | { Opt_blank_pass, "password=" }, |
8830d7e0 SP |
233 | { Opt_pass, "pass=%s" }, |
234 | { Opt_pass, "password=%s" }, | |
4fe9e963 SP |
235 | { Opt_blank_ip, "ip=" }, |
236 | { Opt_blank_ip, "addr=" }, | |
8830d7e0 SP |
237 | { Opt_ip, "ip=%s" }, |
238 | { Opt_ip, "addr=%s" }, | |
73a999fa JL |
239 | { Opt_ignore, "unc=%s" }, |
240 | { Opt_ignore, "target=%s" }, | |
241 | { Opt_ignore, "path=%s" }, | |
8830d7e0 SP |
242 | { Opt_domain, "dom=%s" }, |
243 | { Opt_domain, "domain=%s" }, | |
244 | { Opt_domain, "workgroup=%s" }, | |
245 | { Opt_srcaddr, "srcaddr=%s" }, | |
73a999fa | 246 | { Opt_ignore, "prefixpath=%s" }, |
8830d7e0 | 247 | { Opt_iocharset, "iocharset=%s" }, |
8830d7e0 SP |
248 | { Opt_netbiosname, "netbiosname=%s" }, |
249 | { Opt_servern, "servern=%s" }, | |
250 | { Opt_ver, "ver=%s" }, | |
23db65f5 | 251 | { Opt_vers, "vers=%s" }, |
8830d7e0 | 252 | { Opt_sec, "sec=%s" }, |
15b6a473 | 253 | { Opt_cache, "cache=%s" }, |
8830d7e0 SP |
254 | |
255 | { Opt_ignore, "cred" }, | |
256 | { Opt_ignore, "credentials" }, | |
a557b976 JL |
257 | { Opt_ignore, "cred=%s" }, |
258 | { Opt_ignore, "credentials=%s" }, | |
8830d7e0 SP |
259 | { Opt_ignore, "guest" }, |
260 | { Opt_ignore, "rw" }, | |
261 | { Opt_ignore, "ro" }, | |
262 | { Opt_ignore, "suid" }, | |
263 | { Opt_ignore, "nosuid" }, | |
264 | { Opt_ignore, "exec" }, | |
265 | { Opt_ignore, "noexec" }, | |
266 | { Opt_ignore, "nodev" }, | |
267 | { Opt_ignore, "noauto" }, | |
268 | { Opt_ignore, "dev" }, | |
269 | { Opt_ignore, "mand" }, | |
270 | { Opt_ignore, "nomand" }, | |
9b9c5bea | 271 | { Opt_ignore, "relatime" }, |
8830d7e0 | 272 | { Opt_ignore, "_netdev" }, |
8eecd1c2 | 273 | { Opt_rootfs, "rootfs" }, |
8830d7e0 SP |
274 | |
275 | { Opt_err, NULL } | |
276 | }; | |
277 | ||
278 | enum { | |
279 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
280 | Opt_sec_ntlmsspi, Opt_sec_ntlmssp, | |
7659624f JL |
281 | Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2, |
282 | Opt_sec_ntlmv2i, Opt_sec_lanman, | |
8830d7e0 SP |
283 | Opt_sec_none, |
284 | ||
285 | Opt_sec_err | |
286 | }; | |
287 | ||
288 | static const match_table_t cifs_secflavor_tokens = { | |
289 | { Opt_sec_krb5, "krb5" }, | |
290 | { Opt_sec_krb5i, "krb5i" }, | |
291 | { Opt_sec_krb5p, "krb5p" }, | |
292 | { Opt_sec_ntlmsspi, "ntlmsspi" }, | |
293 | { Opt_sec_ntlmssp, "ntlmssp" }, | |
294 | { Opt_ntlm, "ntlm" }, | |
295 | { Opt_sec_ntlmi, "ntlmi" }, | |
7659624f JL |
296 | { Opt_sec_ntlmv2, "nontlm" }, |
297 | { Opt_sec_ntlmv2, "ntlmv2" }, | |
8830d7e0 | 298 | { Opt_sec_ntlmv2i, "ntlmv2i" }, |
8830d7e0 SP |
299 | { Opt_sec_lanman, "lanman" }, |
300 | { Opt_sec_none, "none" }, | |
301 | ||
302 | { Opt_sec_err, NULL } | |
303 | }; | |
304 | ||
15b6a473 JL |
305 | /* cache flavors */ |
306 | enum { | |
307 | Opt_cache_loose, | |
308 | Opt_cache_strict, | |
309 | Opt_cache_none, | |
83bbfa70 | 310 | Opt_cache_ro, |
41e033fe | 311 | Opt_cache_rw, |
15b6a473 JL |
312 | Opt_cache_err |
313 | }; | |
314 | ||
315 | static const match_table_t cifs_cacheflavor_tokens = { | |
316 | { Opt_cache_loose, "loose" }, | |
317 | { Opt_cache_strict, "strict" }, | |
318 | { Opt_cache_none, "none" }, | |
83bbfa70 | 319 | { Opt_cache_ro, "ro" }, |
41e033fe | 320 | { Opt_cache_rw, "singleclient" }, |
15b6a473 JL |
321 | { Opt_cache_err, NULL } |
322 | }; | |
323 | ||
23db65f5 JL |
324 | static const match_table_t cifs_smb_version_tokens = { |
325 | { Smb_1, SMB1_VERSION_STRING }, | |
dd446b16 | 326 | { Smb_20, SMB20_VERSION_STRING}, |
1080ef75 | 327 | { Smb_21, SMB21_VERSION_STRING }, |
e4aa25e7 | 328 | { Smb_30, SMB30_VERSION_STRING }, |
20b6d8b4 | 329 | { Smb_302, SMB302_VERSION_STRING }, |
4a3b38ae | 330 | { Smb_302, ALT_SMB302_VERSION_STRING }, |
5f7fbf73 | 331 | { Smb_311, SMB311_VERSION_STRING }, |
aab1893d | 332 | { Smb_311, ALT_SMB311_VERSION_STRING }, |
9764c02f SF |
333 | { Smb_3any, SMB3ANY_VERSION_STRING }, |
334 | { Smb_default, SMBDEFAULT_VERSION_STRING }, | |
5f7fbf73 | 335 | { Smb_version_err, NULL } |
23db65f5 JL |
336 | }; |
337 | ||
a9f1b85e PS |
338 | static int ip_connect(struct TCP_Server_Info *server); |
339 | static int generic_ip_connect(struct TCP_Server_Info *server); | |
b647c35f | 340 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
2de970ff | 341 | static void cifs_prune_tlinks(struct work_struct *work); |
93d5cb51 PA |
342 | static char *extract_hostname(const char *unc); |
343 | ||
28eb24ff PA |
344 | /* |
345 | * Resolve hostname and set ip addr in tcp ses. Useful for hostnames that may | |
346 | * get their ip addresses changed at some point. | |
347 | * | |
348 | * This should be called with server->srv_mutex held. | |
349 | */ | |
350 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
351 | static int reconn_set_ipaddr(struct TCP_Server_Info *server) | |
352 | { | |
353 | int rc; | |
354 | int len; | |
355 | char *unc, *ipaddr = NULL; | |
356 | ||
357 | if (!server->hostname) | |
358 | return -EINVAL; | |
359 | ||
360 | len = strlen(server->hostname) + 3; | |
361 | ||
362 | unc = kmalloc(len, GFP_KERNEL); | |
363 | if (!unc) { | |
364 | cifs_dbg(FYI, "%s: failed to create UNC path\n", __func__); | |
365 | return -ENOMEM; | |
366 | } | |
74ea5f98 | 367 | scnprintf(unc, len, "\\\\%s", server->hostname); |
28eb24ff PA |
368 | |
369 | rc = dns_resolve_server_name_to_ip(unc, &ipaddr); | |
370 | kfree(unc); | |
371 | ||
372 | if (rc < 0) { | |
373 | cifs_dbg(FYI, "%s: failed to resolve server part of %s to IP: %d\n", | |
374 | __func__, server->hostname, rc); | |
375 | return rc; | |
376 | } | |
377 | ||
378 | rc = cifs_convert_address((struct sockaddr *)&server->dstaddr, ipaddr, | |
379 | strlen(ipaddr)); | |
380 | kfree(ipaddr); | |
381 | ||
382 | return !rc ? -1 : 0; | |
383 | } | |
384 | #else | |
385 | static inline int reconn_set_ipaddr(struct TCP_Server_Info *server) | |
386 | { | |
387 | return 0; | |
388 | } | |
389 | #endif | |
390 | ||
93d5cb51 PA |
391 | #ifdef CONFIG_CIFS_DFS_UPCALL |
392 | struct super_cb_data { | |
393 | struct TCP_Server_Info *server; | |
8354d88e | 394 | struct super_block *sb; |
93d5cb51 PA |
395 | }; |
396 | ||
397 | /* These functions must be called with server->srv_mutex held */ | |
398 | ||
399 | static void super_cb(struct super_block *sb, void *arg) | |
400 | { | |
401 | struct super_cb_data *d = arg; | |
402 | struct cifs_sb_info *cifs_sb; | |
403 | struct cifs_tcon *tcon; | |
404 | ||
8354d88e | 405 | if (d->sb) |
93d5cb51 PA |
406 | return; |
407 | ||
408 | cifs_sb = CIFS_SB(sb); | |
409 | tcon = cifs_sb_master_tcon(cifs_sb); | |
410 | if (tcon->ses->server == d->server) | |
8354d88e | 411 | d->sb = sb; |
93d5cb51 PA |
412 | } |
413 | ||
8354d88e | 414 | static struct super_block *get_tcp_super(struct TCP_Server_Info *server) |
93d5cb51 PA |
415 | { |
416 | struct super_cb_data d = { | |
417 | .server = server, | |
8354d88e | 418 | .sb = NULL, |
93d5cb51 PA |
419 | }; |
420 | ||
421 | iterate_supers_type(&cifs_fs_type, super_cb, &d); | |
8354d88e PAS |
422 | |
423 | if (unlikely(!d.sb)) | |
424 | return ERR_PTR(-ENOENT); | |
425 | /* | |
426 | * Grab an active reference in order to prevent automounts (DFS links) | |
427 | * of expiring and then freeing up our cifs superblock pointer while | |
428 | * we're doing failover. | |
429 | */ | |
430 | cifs_sb_active(d.sb); | |
431 | return d.sb; | |
432 | } | |
433 | ||
434 | static inline void put_tcp_super(struct super_block *sb) | |
435 | { | |
436 | if (!IS_ERR_OR_NULL(sb)) | |
437 | cifs_sb_deactive(sb); | |
93d5cb51 PA |
438 | } |
439 | ||
440 | static void reconn_inval_dfs_target(struct TCP_Server_Info *server, | |
441 | struct cifs_sb_info *cifs_sb, | |
442 | struct dfs_cache_tgt_list *tgt_list, | |
443 | struct dfs_cache_tgt_iterator **tgt_it) | |
444 | { | |
445 | const char *name; | |
93d5cb51 PA |
446 | |
447 | if (!cifs_sb || !cifs_sb->origin_fullpath || !tgt_list || | |
448 | !server->nr_targets) | |
449 | return; | |
450 | ||
451 | if (!*tgt_it) { | |
452 | *tgt_it = dfs_cache_get_tgt_iterator(tgt_list); | |
453 | } else { | |
454 | *tgt_it = dfs_cache_get_next_tgt(tgt_list, *tgt_it); | |
455 | if (!*tgt_it) | |
456 | *tgt_it = dfs_cache_get_tgt_iterator(tgt_list); | |
457 | } | |
458 | ||
459 | cifs_dbg(FYI, "%s: UNC: %s\n", __func__, cifs_sb->origin_fullpath); | |
460 | ||
461 | name = dfs_cache_get_tgt_name(*tgt_it); | |
462 | ||
463 | kfree(server->hostname); | |
464 | ||
465 | server->hostname = extract_hostname(name); | |
8428817d DC |
466 | if (IS_ERR(server->hostname)) { |
467 | cifs_dbg(FYI, | |
468 | "%s: failed to extract hostname from target: %ld\n", | |
469 | __func__, PTR_ERR(server->hostname)); | |
93d5cb51 PA |
470 | } |
471 | } | |
472 | ||
473 | static inline int reconn_setup_dfs_targets(struct cifs_sb_info *cifs_sb, | |
474 | struct dfs_cache_tgt_list *tl, | |
475 | struct dfs_cache_tgt_iterator **it) | |
476 | { | |
477 | if (!cifs_sb->origin_fullpath) | |
478 | return -EOPNOTSUPP; | |
479 | return dfs_cache_noreq_find(cifs_sb->origin_fullpath + 1, NULL, tl); | |
480 | } | |
481 | #endif | |
1da177e4 | 482 | |
d5c5605c JL |
483 | /* |
484 | * cifs tcp session reconnection | |
485 | * | |
486 | * mark tcp session as reconnecting so temporarily locked | |
487 | * mark all smb sessions as reconnecting for tcp session | |
488 | * reconnect tcp session | |
489 | * wake up waiters on reconnection? - (not needed currently) | |
490 | */ | |
28ea5290 | 491 | int |
1da177e4 LT |
492 | cifs_reconnect(struct TCP_Server_Info *server) |
493 | { | |
494 | int rc = 0; | |
f1987b44 | 495 | struct list_head *tmp, *tmp2; |
96daf2b0 SF |
496 | struct cifs_ses *ses; |
497 | struct cifs_tcon *tcon; | |
fb8c4b14 | 498 | struct mid_q_entry *mid_entry; |
3c1105df | 499 | struct list_head retry_list; |
93d5cb51 | 500 | #ifdef CONFIG_CIFS_DFS_UPCALL |
8354d88e | 501 | struct super_block *sb = NULL; |
23324407 PA |
502 | struct cifs_sb_info *cifs_sb = NULL; |
503 | struct dfs_cache_tgt_list tgt_list = {0}; | |
93d5cb51 PA |
504 | struct dfs_cache_tgt_iterator *tgt_it = NULL; |
505 | #endif | |
50c2f753 | 506 | |
1da177e4 | 507 | spin_lock(&GlobalMid_Lock); |
93d5cb51 PA |
508 | server->nr_targets = 1; |
509 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
61cabc7b | 510 | spin_unlock(&GlobalMid_Lock); |
8354d88e PAS |
511 | sb = get_tcp_super(server); |
512 | if (IS_ERR(sb)) { | |
513 | rc = PTR_ERR(sb); | |
93d5cb51 PA |
514 | cifs_dbg(FYI, "%s: will not do DFS failover: rc = %d\n", |
515 | __func__, rc); | |
8354d88e | 516 | sb = NULL; |
93d5cb51 | 517 | } else { |
8354d88e PAS |
518 | cifs_sb = CIFS_SB(sb); |
519 | ||
93d5cb51 | 520 | rc = reconn_setup_dfs_targets(cifs_sb, &tgt_list, &tgt_it); |
55a7f006 | 521 | if (rc && (rc != -EOPNOTSUPP)) { |
afe6f653 | 522 | cifs_server_dbg(VFS, "%s: no target servers for DFS failover\n", |
93d5cb51 PA |
523 | __func__); |
524 | } else { | |
525 | server->nr_targets = dfs_cache_get_nr_tgts(&tgt_list); | |
526 | } | |
527 | } | |
528 | cifs_dbg(FYI, "%s: will retry %d target(s)\n", __func__, | |
529 | server->nr_targets); | |
61cabc7b | 530 | spin_lock(&GlobalMid_Lock); |
93d5cb51 | 531 | #endif |
469ee614 | 532 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 533 | /* the demux thread will exit normally |
1da177e4 LT |
534 | next time through the loop */ |
535 | spin_unlock(&GlobalMid_Lock); | |
8354d88e PAS |
536 | #ifdef CONFIG_CIFS_DFS_UPCALL |
537 | dfs_cache_free_tgts(&tgt_list); | |
538 | put_tcp_super(sb); | |
539 | #endif | |
1da177e4 LT |
540 | return rc; |
541 | } else | |
542 | server->tcpStatus = CifsNeedReconnect; | |
543 | spin_unlock(&GlobalMid_Lock); | |
544 | server->maxBuf = 0; | |
aa24d1e9 | 545 | server->max_read = 0; |
1da177e4 | 546 | |
6e4d3bbe | 547 | cifs_dbg(FYI, "Mark tcp session as need reconnect\n"); |
bf1fdeb7 | 548 | trace_smb3_reconnect(server->CurrentMid, server->hostname); |
1da177e4 LT |
549 | |
550 | /* before reconnecting the tcp session, mark the smb session (uid) | |
551 | and the tid bad so they are not used until reconnected */ | |
f96637be JP |
552 | cifs_dbg(FYI, "%s: marking sessions and tcons for reconnect\n", |
553 | __func__); | |
3f9bcca7 | 554 | spin_lock(&cifs_tcp_ses_lock); |
14fbf50d | 555 | list_for_each(tmp, &server->smb_ses_list) { |
96daf2b0 | 556 | ses = list_entry(tmp, struct cifs_ses, smb_ses_list); |
14fbf50d | 557 | ses->need_reconnect = true; |
f1987b44 | 558 | list_for_each(tmp2, &ses->tcon_list) { |
96daf2b0 | 559 | tcon = list_entry(tmp2, struct cifs_tcon, tcon_list); |
3b795210 | 560 | tcon->need_reconnect = true; |
1da177e4 | 561 | } |
b327a717 AA |
562 | if (ses->tcon_ipc) |
563 | ses->tcon_ipc->need_reconnect = true; | |
1da177e4 | 564 | } |
3f9bcca7 | 565 | spin_unlock(&cifs_tcp_ses_lock); |
2b84a36c | 566 | |
1da177e4 | 567 | /* do not want to be sending data on a socket we are freeing */ |
f96637be | 568 | cifs_dbg(FYI, "%s: tearing down socket\n", __func__); |
72ca545b | 569 | mutex_lock(&server->srv_mutex); |
1d2a4f57 LL |
570 | if (server->ssocket) { |
571 | cifs_dbg(FYI, "State: 0x%x Flags: 0x%lx\n", | |
572 | server->ssocket->state, server->ssocket->flags); | |
573 | kernel_sock_shutdown(server->ssocket, SHUT_WR); | |
574 | cifs_dbg(FYI, "Post shutdown state: 0x%x Flags: 0x%lx\n", | |
575 | server->ssocket->state, server->ssocket->flags); | |
576 | sock_release(server->ssocket); | |
577 | server->ssocket = NULL; | |
578 | } | |
579 | server->sequence_number = 0; | |
580 | server->session_estab = false; | |
581 | kfree(server->session_key.response); | |
582 | server->session_key.response = NULL; | |
583 | server->session_key.len = 0; | |
584 | server->lstrp = jiffies; | |
1da177e4 | 585 | |
2b84a36c | 586 | /* mark submitted MIDs for retry and issue callback */ |
3c1105df | 587 | INIT_LIST_HEAD(&retry_list); |
f96637be | 588 | cifs_dbg(FYI, "%s: moving mids to private list\n", __func__); |
1da177e4 | 589 | spin_lock(&GlobalMid_Lock); |
2b84a36c JL |
590 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
591 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
abe57073 | 592 | kref_get(&mid_entry->refcount); |
7c9421e1 PS |
593 | if (mid_entry->mid_state == MID_REQUEST_SUBMITTED) |
594 | mid_entry->mid_state = MID_RETRY_NEEDED; | |
3c1105df | 595 | list_move(&mid_entry->qhead, &retry_list); |
abe57073 | 596 | mid_entry->mid_flags |= MID_DELETED; |
3c1105df JL |
597 | } |
598 | spin_unlock(&GlobalMid_Lock); | |
1d2a4f57 | 599 | mutex_unlock(&server->srv_mutex); |
3c1105df | 600 | |
f96637be | 601 | cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__); |
3c1105df JL |
602 | list_for_each_safe(tmp, tmp2, &retry_list) { |
603 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
2b84a36c JL |
604 | list_del_init(&mid_entry->qhead); |
605 | mid_entry->callback(mid_entry); | |
abe57073 | 606 | cifs_mid_q_entry_release(mid_entry); |
1da177e4 | 607 | } |
1da177e4 | 608 | |
1d2a4f57 LL |
609 | if (cifs_rdma_enabled(server)) { |
610 | mutex_lock(&server->srv_mutex); | |
214bab44 | 611 | smbd_destroy(server); |
1d2a4f57 LL |
612 | mutex_unlock(&server->srv_mutex); |
613 | } | |
214bab44 | 614 | |
7fdbaa1b | 615 | do { |
6c3d8909 | 616 | try_to_freeze(); |
a9f1b85e | 617 | |
73e216a8 | 618 | mutex_lock(&server->srv_mutex); |
93d5cb51 PA |
619 | /* |
620 | * Set up next DFS target server (if any) for reconnect. If DFS | |
621 | * feature is disabled, then we will retry last server we | |
622 | * connected to before. | |
623 | */ | |
781a8050 LL |
624 | if (cifs_rdma_enabled(server)) |
625 | rc = smbd_reconnect(server); | |
626 | else | |
627 | rc = generic_ip_connect(server); | |
fb8c4b14 | 628 | if (rc) { |
f96637be | 629 | cifs_dbg(FYI, "reconnect error %d\n", rc); |
93d5cb51 PA |
630 | #ifdef CONFIG_CIFS_DFS_UPCALL |
631 | reconn_inval_dfs_target(server, cifs_sb, &tgt_list, | |
632 | &tgt_it); | |
633 | #endif | |
28eb24ff PA |
634 | rc = reconn_set_ipaddr(server); |
635 | if (rc) { | |
636 | cifs_dbg(FYI, "%s: failed to resolve hostname: %d\n", | |
637 | __func__, rc); | |
638 | } | |
4afe260b | 639 | mutex_unlock(&server->srv_mutex); |
0cb766ae | 640 | msleep(3000); |
1da177e4 LT |
641 | } else { |
642 | atomic_inc(&tcpSesReconnectCount); | |
335b7b62 | 643 | set_credits(server, 1); |
1da177e4 | 644 | spin_lock(&GlobalMid_Lock); |
469ee614 | 645 | if (server->tcpStatus != CifsExiting) |
fd88ce93 | 646 | server->tcpStatus = CifsNeedNegotiate; |
fb8c4b14 | 647 | spin_unlock(&GlobalMid_Lock); |
4afe260b | 648 | mutex_unlock(&server->srv_mutex); |
1da177e4 | 649 | } |
7fdbaa1b | 650 | } while (server->tcpStatus == CifsNeedReconnect); |
2b84a36c | 651 | |
93d5cb51 PA |
652 | #ifdef CONFIG_CIFS_DFS_UPCALL |
653 | if (tgt_it) { | |
654 | rc = dfs_cache_noreq_update_tgthint(cifs_sb->origin_fullpath + 1, | |
655 | tgt_it); | |
656 | if (rc) { | |
afe6f653 | 657 | cifs_server_dbg(VFS, "%s: failed to update DFS target hint: rc = %d\n", |
93d5cb51 PA |
658 | __func__, rc); |
659 | } | |
660 | rc = dfs_cache_update_vol(cifs_sb->origin_fullpath, server); | |
661 | if (rc) { | |
afe6f653 | 662 | cifs_server_dbg(VFS, "%s: failed to update vol info in DFS cache: rc = %d\n", |
93d5cb51 PA |
663 | __func__, rc); |
664 | } | |
23324407 | 665 | dfs_cache_free_tgts(&tgt_list); |
8354d88e | 666 | |
93d5cb51 | 667 | } |
8354d88e PAS |
668 | |
669 | put_tcp_super(sb); | |
93d5cb51 | 670 | #endif |
b8c60012 SP |
671 | if (server->tcpStatus == CifsNeedNegotiate) |
672 | mod_delayed_work(cifsiod_wq, &server->echo, 0); | |
673 | ||
1da177e4 LT |
674 | return rc; |
675 | } | |
676 | ||
c74093b6 JL |
677 | static void |
678 | cifs_echo_request(struct work_struct *work) | |
679 | { | |
680 | int rc; | |
681 | struct TCP_Server_Info *server = container_of(work, | |
682 | struct TCP_Server_Info, echo.work); | |
b8c60012 SP |
683 | unsigned long echo_interval; |
684 | ||
685 | /* | |
686 | * If we need to renegotiate, set echo interval to zero to | |
687 | * immediately call echo service where we can renegotiate. | |
688 | */ | |
689 | if (server->tcpStatus == CifsNeedNegotiate) | |
690 | echo_interval = 0; | |
691 | else | |
692 | echo_interval = server->echo_interval; | |
c74093b6 | 693 | |
247ec9b4 | 694 | /* |
b8c60012 SP |
695 | * We cannot send an echo if it is disabled. |
696 | * Also, no need to ping if we got a response recently. | |
247ec9b4 | 697 | */ |
4fcd1813 SF |
698 | |
699 | if (server->tcpStatus == CifsNeedReconnect || | |
b8c60012 SP |
700 | server->tcpStatus == CifsExiting || |
701 | server->tcpStatus == CifsNew || | |
f6d76178 | 702 | (server->ops->can_echo && !server->ops->can_echo(server)) || |
adfeb3e0 | 703 | time_before(jiffies, server->lstrp + echo_interval - HZ)) |
c74093b6 JL |
704 | goto requeue_echo; |
705 | ||
f6d76178 | 706 | rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS; |
c74093b6 | 707 | if (rc) |
f96637be JP |
708 | cifs_dbg(FYI, "Unable to send echo request to server: %s\n", |
709 | server->hostname); | |
c74093b6 JL |
710 | |
711 | requeue_echo: | |
b8c60012 | 712 | queue_delayed_work(cifsiod_wq, &server->echo, server->echo_interval); |
c74093b6 JL |
713 | } |
714 | ||
3d9c2472 | 715 | static bool |
2a37ef94 | 716 | allocate_buffers(struct TCP_Server_Info *server) |
3d9c2472 | 717 | { |
2a37ef94 JL |
718 | if (!server->bigbuf) { |
719 | server->bigbuf = (char *)cifs_buf_get(); | |
720 | if (!server->bigbuf) { | |
afe6f653 | 721 | cifs_server_dbg(VFS, "No memory for large SMB response\n"); |
3d9c2472 PS |
722 | msleep(3000); |
723 | /* retry will check if exiting */ | |
724 | return false; | |
725 | } | |
2a37ef94 | 726 | } else if (server->large_buf) { |
3d9c2472 | 727 | /* we are reusing a dirty large buf, clear its start */ |
1887f601 | 728 | memset(server->bigbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
729 | } |
730 | ||
2a37ef94 JL |
731 | if (!server->smallbuf) { |
732 | server->smallbuf = (char *)cifs_small_buf_get(); | |
733 | if (!server->smallbuf) { | |
afe6f653 | 734 | cifs_server_dbg(VFS, "No memory for SMB response\n"); |
3d9c2472 PS |
735 | msleep(1000); |
736 | /* retry will check if exiting */ | |
737 | return false; | |
738 | } | |
739 | /* beginning of smb buffer is cleared in our buf_get */ | |
740 | } else { | |
741 | /* if existing small buf clear beginning */ | |
1887f601 | 742 | memset(server->smallbuf, 0, HEADER_SIZE(server)); |
3d9c2472 PS |
743 | } |
744 | ||
3d9c2472 PS |
745 | return true; |
746 | } | |
747 | ||
ba749e6d JL |
748 | static bool |
749 | server_unresponsive(struct TCP_Server_Info *server) | |
750 | { | |
6dae51a5 | 751 | /* |
f2caf901 | 752 | * We need to wait 3 echo intervals to make sure we handle such |
6dae51a5 PS |
753 | * situations right: |
754 | * 1s client sends a normal SMB request | |
becc2ba2 | 755 | * 2s client gets a response |
6dae51a5 PS |
756 | * 30s echo workqueue job pops, and decides we got a response recently |
757 | * and don't need to send another | |
758 | * ... | |
759 | * 65s kernel_recvmsg times out, and we see that we haven't gotten | |
760 | * a response in >60s. | |
761 | */ | |
76e75270 SC |
762 | if ((server->tcpStatus == CifsGood || |
763 | server->tcpStatus == CifsNeedNegotiate) && | |
f2caf901 | 764 | time_after(jiffies, server->lstrp + 3 * server->echo_interval)) { |
afe6f653 RS |
765 | cifs_server_dbg(VFS, "has not responded in %lu seconds. Reconnecting...\n", |
766 | (3 * server->echo_interval) / HZ); | |
ba749e6d JL |
767 | cifs_reconnect(server); |
768 | wake_up(&server->response_q); | |
769 | return true; | |
770 | } | |
771 | ||
772 | return false; | |
773 | } | |
774 | ||
ef68e831 PS |
775 | static inline bool |
776 | zero_credits(struct TCP_Server_Info *server) | |
777 | { | |
778 | int val; | |
779 | ||
780 | spin_lock(&server->req_lock); | |
781 | val = server->credits + server->echo_credits + server->oplock_credits; | |
782 | if (server->in_flight == 0 && val == 0) { | |
783 | spin_unlock(&server->req_lock); | |
784 | return true; | |
785 | } | |
786 | spin_unlock(&server->req_lock); | |
787 | return false; | |
788 | } | |
789 | ||
71335664 AV |
790 | static int |
791 | cifs_readv_from_socket(struct TCP_Server_Info *server, struct msghdr *smb_msg) | |
e7015fb1 | 792 | { |
a52c1eb7 JL |
793 | int length = 0; |
794 | int total_read; | |
e7015fb1 | 795 | |
71335664 AV |
796 | smb_msg->msg_control = NULL; |
797 | smb_msg->msg_controllen = 0; | |
e831e6cf | 798 | |
71335664 | 799 | for (total_read = 0; msg_data_left(smb_msg); total_read += length) { |
95edcff4 JL |
800 | try_to_freeze(); |
801 | ||
ef68e831 PS |
802 | /* reconnect if no credits and no requests in flight */ |
803 | if (zero_credits(server)) { | |
804 | cifs_reconnect(server); | |
805 | return -ECONNABORTED; | |
806 | } | |
807 | ||
71335664 AV |
808 | if (server_unresponsive(server)) |
809 | return -ECONNABORTED; | |
2fef137a LL |
810 | if (cifs_rdma_enabled(server) && server->smbd_conn) |
811 | length = smbd_recv(server->smbd_conn, smb_msg); | |
812 | else | |
813 | length = sock_recvmsg(server->ssocket, smb_msg, 0); | |
42c4dfc2 | 814 | |
71335664 AV |
815 | if (server->tcpStatus == CifsExiting) |
816 | return -ESHUTDOWN; | |
e7015fb1 | 817 | |
71335664 | 818 | if (server->tcpStatus == CifsNeedReconnect) { |
e7015fb1 | 819 | cifs_reconnect(server); |
71335664 AV |
820 | return -ECONNABORTED; |
821 | } | |
822 | ||
823 | if (length == -ERESTARTSYS || | |
824 | length == -EAGAIN || | |
825 | length == -EINTR) { | |
e7015fb1 PS |
826 | /* |
827 | * Minimum sleep to prevent looping, allowing socket | |
828 | * to clear and app threads to set tcpStatus | |
829 | * CifsNeedReconnect if server hung. | |
830 | */ | |
831 | usleep_range(1000, 2000); | |
832 | length = 0; | |
a52c1eb7 | 833 | continue; |
71335664 AV |
834 | } |
835 | ||
836 | if (length <= 0) { | |
09aab880 | 837 | cifs_dbg(FYI, "Received no data or error: %d\n", length); |
e7015fb1 | 838 | cifs_reconnect(server); |
71335664 | 839 | return -ECONNABORTED; |
e7015fb1 PS |
840 | } |
841 | } | |
a52c1eb7 | 842 | return total_read; |
e7015fb1 | 843 | } |
e7015fb1 | 844 | |
e28bc5b1 JL |
845 | int |
846 | cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, | |
847 | unsigned int to_read) | |
42c4dfc2 | 848 | { |
71335664 AV |
849 | struct msghdr smb_msg; |
850 | struct kvec iov = {.iov_base = buf, .iov_len = to_read}; | |
aa563d7b | 851 | iov_iter_kvec(&smb_msg.msg_iter, READ, &iov, 1, to_read); |
42c4dfc2 | 852 | |
71335664 AV |
853 | return cifs_readv_from_socket(server, &smb_msg); |
854 | } | |
42c4dfc2 | 855 | |
71335664 AV |
856 | int |
857 | cifs_read_page_from_socket(struct TCP_Server_Info *server, struct page *page, | |
1dbe3466 | 858 | unsigned int page_offset, unsigned int to_read) |
71335664 AV |
859 | { |
860 | struct msghdr smb_msg; | |
1dbe3466 LL |
861 | struct bio_vec bv = { |
862 | .bv_page = page, .bv_len = to_read, .bv_offset = page_offset}; | |
aa563d7b | 863 | iov_iter_bvec(&smb_msg.msg_iter, READ, &bv, 1, to_read); |
71335664 | 864 | return cifs_readv_from_socket(server, &smb_msg); |
e7015fb1 PS |
865 | } |
866 | ||
98bac62c | 867 | static bool |
fe11e4cc | 868 | is_smb_response(struct TCP_Server_Info *server, unsigned char type) |
98bac62c | 869 | { |
98bac62c PS |
870 | /* |
871 | * The first byte big endian of the length field, | |
872 | * is actually not part of the length but the type | |
873 | * with the most common, zero, as regular data. | |
874 | */ | |
fe11e4cc JL |
875 | switch (type) { |
876 | case RFC1002_SESSION_MESSAGE: | |
877 | /* Regular SMB response */ | |
878 | return true; | |
879 | case RFC1002_SESSION_KEEP_ALIVE: | |
f96637be | 880 | cifs_dbg(FYI, "RFC 1002 session keep alive\n"); |
fe11e4cc JL |
881 | break; |
882 | case RFC1002_POSITIVE_SESSION_RESPONSE: | |
f96637be | 883 | cifs_dbg(FYI, "RFC 1002 positive session response\n"); |
fe11e4cc JL |
884 | break; |
885 | case RFC1002_NEGATIVE_SESSION_RESPONSE: | |
98bac62c PS |
886 | /* |
887 | * We get this from Windows 98 instead of an error on | |
888 | * SMB negprot response. | |
889 | */ | |
f96637be | 890 | cifs_dbg(FYI, "RFC 1002 negative session response\n"); |
98bac62c PS |
891 | /* give server a second to clean up */ |
892 | msleep(1000); | |
893 | /* | |
894 | * Always try 445 first on reconnect since we get NACK | |
895 | * on some if we ever connected to port 139 (the NACK | |
896 | * is since we do not begin with RFC1001 session | |
897 | * initialize frame). | |
898 | */ | |
fe11e4cc | 899 | cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT); |
98bac62c PS |
900 | cifs_reconnect(server); |
901 | wake_up(&server->response_q); | |
fe11e4cc JL |
902 | break; |
903 | default: | |
afe6f653 | 904 | cifs_server_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type); |
98bac62c | 905 | cifs_reconnect(server); |
98bac62c PS |
906 | } |
907 | ||
fe11e4cc | 908 | return false; |
98bac62c PS |
909 | } |
910 | ||
e28bc5b1 JL |
911 | void |
912 | dequeue_mid(struct mid_q_entry *mid, bool malformed) | |
ea1f4502 | 913 | { |
ad69bae1 | 914 | #ifdef CONFIG_CIFS_STATS2 |
ea1f4502 | 915 | mid->when_received = jiffies; |
ad69bae1 | 916 | #endif |
ea1f4502 JL |
917 | spin_lock(&GlobalMid_Lock); |
918 | if (!malformed) | |
7c9421e1 | 919 | mid->mid_state = MID_RESPONSE_RECEIVED; |
ea1f4502 | 920 | else |
7c9421e1 | 921 | mid->mid_state = MID_RESPONSE_MALFORMED; |
ddf83afb RS |
922 | /* |
923 | * Trying to handle/dequeue a mid after the send_recv() | |
924 | * function has finished processing it is a bug. | |
925 | */ | |
926 | if (mid->mid_flags & MID_DELETED) | |
927 | printk_once(KERN_WARNING | |
928 | "trying to dequeue a deleted mid\n"); | |
abe57073 | 929 | else { |
ddf83afb | 930 | list_del_init(&mid->qhead); |
abe57073 PS |
931 | mid->mid_flags |= MID_DELETED; |
932 | } | |
ad69bae1 | 933 | spin_unlock(&GlobalMid_Lock); |
ea1f4502 | 934 | } |
ad69bae1 | 935 | |
86a7964b PS |
936 | static unsigned int |
937 | smb2_get_credits_from_hdr(char *buffer, struct TCP_Server_Info *server) | |
938 | { | |
939 | struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buffer; | |
940 | ||
941 | /* | |
942 | * SMB1 does not use credits. | |
943 | */ | |
944 | if (server->vals->header_preamble_size) | |
945 | return 0; | |
946 | ||
947 | return le16_to_cpu(shdr->CreditRequest); | |
948 | } | |
949 | ||
c8054ebd JL |
950 | static void |
951 | handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, | |
d4e4854f | 952 | char *buf, int malformed) |
ea1f4502 | 953 | { |
316cf94a PS |
954 | if (server->ops->check_trans2 && |
955 | server->ops->check_trans2(mid, server, buf, malformed)) | |
c8054ebd | 956 | return; |
86a7964b | 957 | mid->credits_received = smb2_get_credits_from_hdr(buf, server); |
ea1f4502 | 958 | mid->resp_buf = buf; |
7c9421e1 | 959 | mid->large_buf = server->large_buf; |
2a37ef94 JL |
960 | /* Was previous buf put in mpx struct for multi-rsp? */ |
961 | if (!mid->multiRsp) { | |
962 | /* smb buffer will be freed by user thread */ | |
963 | if (server->large_buf) | |
964 | server->bigbuf = NULL; | |
965 | else | |
966 | server->smallbuf = NULL; | |
967 | } | |
ffc00e27 | 968 | dequeue_mid(mid, malformed); |
ad69bae1 PS |
969 | } |
970 | ||
762dfd10 PS |
971 | static void clean_demultiplex_info(struct TCP_Server_Info *server) |
972 | { | |
973 | int length; | |
974 | ||
975 | /* take it off the list, if it's not already */ | |
976 | spin_lock(&cifs_tcp_ses_lock); | |
977 | list_del_init(&server->tcp_ses_list); | |
978 | spin_unlock(&cifs_tcp_ses_lock); | |
979 | ||
980 | spin_lock(&GlobalMid_Lock); | |
981 | server->tcpStatus = CifsExiting; | |
982 | spin_unlock(&GlobalMid_Lock); | |
983 | wake_up_all(&server->response_q); | |
984 | ||
2d86dbc9 | 985 | /* check if we have blocked requests that need to free */ |
fc40f9cf | 986 | spin_lock(&server->req_lock); |
2d86dbc9 PS |
987 | if (server->credits <= 0) |
988 | server->credits = 1; | |
fc40f9cf | 989 | spin_unlock(&server->req_lock); |
762dfd10 PS |
990 | /* |
991 | * Although there should not be any requests blocked on this queue it | |
992 | * can not hurt to be paranoid and try to wake up requests that may | |
993 | * haven been blocked when more than 50 at time were on the wire to the | |
994 | * same server - they now will see the session is in exit state and get | |
995 | * out of SendReceive. | |
996 | */ | |
997 | wake_up_all(&server->request_q); | |
998 | /* give those requests time to exit */ | |
999 | msleep(125); | |
050b8c37 LL |
1000 | if (cifs_rdma_enabled(server)) |
1001 | smbd_destroy(server); | |
762dfd10 PS |
1002 | if (server->ssocket) { |
1003 | sock_release(server->ssocket); | |
1004 | server->ssocket = NULL; | |
1005 | } | |
1006 | ||
1007 | if (!list_empty(&server->pending_mid_q)) { | |
1008 | struct list_head dispose_list; | |
1009 | struct mid_q_entry *mid_entry; | |
1010 | struct list_head *tmp, *tmp2; | |
1011 | ||
1012 | INIT_LIST_HEAD(&dispose_list); | |
1013 | spin_lock(&GlobalMid_Lock); | |
1014 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { | |
1015 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
f96637be | 1016 | cifs_dbg(FYI, "Clearing mid 0x%llx\n", mid_entry->mid); |
abe57073 | 1017 | kref_get(&mid_entry->refcount); |
7c9421e1 | 1018 | mid_entry->mid_state = MID_SHUTDOWN; |
762dfd10 | 1019 | list_move(&mid_entry->qhead, &dispose_list); |
abe57073 | 1020 | mid_entry->mid_flags |= MID_DELETED; |
762dfd10 PS |
1021 | } |
1022 | spin_unlock(&GlobalMid_Lock); | |
1023 | ||
1024 | /* now walk dispose list and issue callbacks */ | |
1025 | list_for_each_safe(tmp, tmp2, &dispose_list) { | |
1026 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
f96637be | 1027 | cifs_dbg(FYI, "Callback mid 0x%llx\n", mid_entry->mid); |
762dfd10 PS |
1028 | list_del_init(&mid_entry->qhead); |
1029 | mid_entry->callback(mid_entry); | |
abe57073 | 1030 | cifs_mid_q_entry_release(mid_entry); |
762dfd10 PS |
1031 | } |
1032 | /* 1/8th of sec is more than enough time for them to exit */ | |
1033 | msleep(125); | |
1034 | } | |
1035 | ||
1036 | if (!list_empty(&server->pending_mid_q)) { | |
1037 | /* | |
1038 | * mpx threads have not exited yet give them at least the smb | |
1039 | * send timeout time for long ops. | |
1040 | * | |
1041 | * Due to delays on oplock break requests, we need to wait at | |
1042 | * least 45 seconds before giving up on a request getting a | |
1043 | * response and going ahead and killing cifsd. | |
1044 | */ | |
f96637be | 1045 | cifs_dbg(FYI, "Wait for exit from demultiplex thread\n"); |
762dfd10 PS |
1046 | msleep(46000); |
1047 | /* | |
1048 | * If threads still have not exited they are probably never | |
1049 | * coming home not much else we can do but free the memory. | |
1050 | */ | |
1051 | } | |
1052 | ||
1053 | kfree(server->hostname); | |
1054 | kfree(server); | |
1055 | ||
1056 | length = atomic_dec_return(&tcpSesAllocCount); | |
1057 | if (length > 0) | |
11d83360 | 1058 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv); |
762dfd10 PS |
1059 | } |
1060 | ||
e9097ab4 JL |
1061 | static int |
1062 | standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
1063 | { | |
1064 | int length; | |
1065 | char *buf = server->smallbuf; | |
2e96467d | 1066 | unsigned int pdu_length = server->pdu_size; |
e9097ab4 JL |
1067 | |
1068 | /* make sure this will fit in a large buffer */ | |
93012bf9 RS |
1069 | if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - |
1070 | server->vals->header_preamble_size) { | |
afe6f653 | 1071 | cifs_server_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length); |
e9097ab4 JL |
1072 | cifs_reconnect(server); |
1073 | wake_up(&server->response_q); | |
3fabaa27 | 1074 | return -ECONNABORTED; |
e9097ab4 JL |
1075 | } |
1076 | ||
1077 | /* switch to large buffer if too big for a small one */ | |
1078 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { | |
1079 | server->large_buf = true; | |
d4e4854f | 1080 | memcpy(server->bigbuf, buf, server->total_read); |
e9097ab4 | 1081 | buf = server->bigbuf; |
e9097ab4 JL |
1082 | } |
1083 | ||
1084 | /* now read the rest */ | |
1887f601 | 1085 | length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, |
93012bf9 RS |
1086 | pdu_length - HEADER_SIZE(server) + 1 |
1087 | + server->vals->header_preamble_size); | |
1088 | ||
e9097ab4 JL |
1089 | if (length < 0) |
1090 | return length; | |
1091 | server->total_read += length; | |
1092 | ||
d4e4854f | 1093 | dump_smb(buf, server->total_read); |
e9097ab4 | 1094 | |
4326ed2f PS |
1095 | return cifs_handle_standard(server, mid); |
1096 | } | |
1097 | ||
1098 | int | |
1099 | cifs_handle_standard(struct TCP_Server_Info *server, struct mid_q_entry *mid) | |
1100 | { | |
1101 | char *buf = server->large_buf ? server->bigbuf : server->smallbuf; | |
1102 | int length; | |
1103 | ||
e9097ab4 JL |
1104 | /* |
1105 | * We know that we received enough to get to the MID as we | |
1106 | * checked the pdu_length earlier. Now check to see | |
1107 | * if the rest of the header is OK. We borrow the length | |
1108 | * var for the rest of the loop to avoid a new stack var. | |
1109 | * | |
1110 | * 48 bytes is enough to display the header and a little bit | |
1111 | * into the payload for debugging purposes. | |
1112 | */ | |
373512ec | 1113 | length = server->ops->check_message(buf, server->total_read, server); |
e9097ab4 JL |
1114 | if (length != 0) |
1115 | cifs_dump_mem("Bad SMB: ", buf, | |
1116 | min_t(unsigned int, server->total_read, 48)); | |
1117 | ||
511c54a2 PS |
1118 | if (server->ops->is_session_expired && |
1119 | server->ops->is_session_expired(buf)) { | |
1120 | cifs_reconnect(server); | |
1121 | wake_up(&server->response_q); | |
1122 | return -1; | |
1123 | } | |
1124 | ||
2e44b288 | 1125 | if (server->ops->is_status_pending && |
66265f13 | 1126 | server->ops->is_status_pending(buf, server)) |
2e44b288 PS |
1127 | return -1; |
1128 | ||
ff4fa4a2 JL |
1129 | if (!mid) |
1130 | return length; | |
e9097ab4 | 1131 | |
d4e4854f | 1132 | handle_mid(mid, server, buf, length); |
ff4fa4a2 | 1133 | return 0; |
e9097ab4 JL |
1134 | } |
1135 | ||
eca00452 RS |
1136 | static void |
1137 | smb2_add_credits_from_hdr(char *buffer, struct TCP_Server_Info *server) | |
1138 | { | |
1139 | struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buffer; | |
1140 | ||
1141 | /* | |
1142 | * SMB1 does not use credits. | |
1143 | */ | |
1144 | if (server->vals->header_preamble_size) | |
1145 | return; | |
1146 | ||
1147 | if (shdr->CreditRequest) { | |
1148 | spin_lock(&server->req_lock); | |
1149 | server->credits += le16_to_cpu(shdr->CreditRequest); | |
1150 | spin_unlock(&server->req_lock); | |
1151 | wake_up(&server->request_q); | |
1152 | } | |
1153 | } | |
1154 | ||
1155 | ||
1da177e4 | 1156 | static int |
7c97c200 | 1157 | cifs_demultiplex_thread(void *p) |
1da177e4 | 1158 | { |
b24df3e3 | 1159 | int i, num_mids, length; |
7c97c200 | 1160 | struct TCP_Server_Info *server = p; |
2a37ef94 | 1161 | unsigned int pdu_length; |
8ce79ec3 | 1162 | unsigned int next_offset; |
2a37ef94 | 1163 | char *buf = NULL; |
a5c3e1c7 | 1164 | struct task_struct *task_to_wake = NULL; |
b24df3e3 RS |
1165 | struct mid_q_entry *mids[MAX_COMPOUND]; |
1166 | char *bufs[MAX_COMPOUND]; | |
1da177e4 | 1167 | |
1da177e4 | 1168 | current->flags |= PF_MEMALLOC; |
f96637be | 1169 | cifs_dbg(FYI, "Demultiplex PID: %d\n", task_pid_nr(current)); |
93d0ec85 JL |
1170 | |
1171 | length = atomic_inc_return(&tcpSesAllocCount); | |
1172 | if (length > 1) | |
11d83360 | 1173 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv); |
1da177e4 | 1174 | |
83144186 | 1175 | set_freezable(); |
33da8e7c | 1176 | allow_kernel_signal(SIGKILL); |
469ee614 | 1177 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
1178 | if (try_to_freeze()) |
1179 | continue; | |
b8643e1b | 1180 | |
2a37ef94 | 1181 | if (!allocate_buffers(server)) |
3d9c2472 | 1182 | continue; |
b8643e1b | 1183 | |
2a37ef94 | 1184 | server->large_buf = false; |
2a37ef94 | 1185 | buf = server->smallbuf; |
f01d5e14 | 1186 | pdu_length = 4; /* enough to get RFC1001 header */ |
fda35943 | 1187 | |
e28bc5b1 | 1188 | length = cifs_read_from_socket(server, buf, pdu_length); |
a52c1eb7 | 1189 | if (length < 0) |
1da177e4 | 1190 | continue; |
977b6170 RS |
1191 | |
1192 | if (server->vals->header_preamble_size == 0) | |
1193 | server->total_read = 0; | |
1194 | else | |
1195 | server->total_read = length; | |
1da177e4 | 1196 | |
98bac62c PS |
1197 | /* |
1198 | * The right amount was read from socket - 4 bytes, | |
1199 | * so we can now interpret the length field. | |
1200 | */ | |
d4e4854f | 1201 | pdu_length = get_rfc1002_length(buf); |
70ca734a | 1202 | |
f96637be | 1203 | cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length); |
fe11e4cc | 1204 | if (!is_smb_response(server, buf[0])) |
fb8c4b14 | 1205 | continue; |
8ce79ec3 RS |
1206 | next_pdu: |
1207 | server->pdu_size = pdu_length; | |
e4eb295d | 1208 | |
89482a56 | 1209 | /* make sure we have enough to get to the MID */ |
8ce79ec3 | 1210 | if (server->pdu_size < HEADER_SIZE(server) - 1 - |
93012bf9 | 1211 | server->vals->header_preamble_size) { |
afe6f653 | 1212 | cifs_server_dbg(VFS, "SMB response too short (%u bytes)\n", |
8ce79ec3 | 1213 | server->pdu_size); |
89482a56 JL |
1214 | cifs_reconnect(server); |
1215 | wake_up(&server->response_q); | |
1216 | continue; | |
e4eb295d | 1217 | } |
e7015fb1 | 1218 | |
89482a56 | 1219 | /* read down to the MID */ |
93012bf9 RS |
1220 | length = cifs_read_from_socket(server, |
1221 | buf + server->vals->header_preamble_size, | |
1222 | HEADER_SIZE(server) - 1 | |
1223 | - server->vals->header_preamble_size); | |
89482a56 | 1224 | if (length < 0) |
e4eb295d | 1225 | continue; |
2a37ef94 | 1226 | server->total_read += length; |
1da177e4 | 1227 | |
8ce79ec3 RS |
1228 | if (server->ops->next_header) { |
1229 | next_offset = server->ops->next_header(buf); | |
1230 | if (next_offset) | |
1231 | server->pdu_size = next_offset; | |
1232 | } | |
1233 | ||
b24df3e3 RS |
1234 | memset(mids, 0, sizeof(mids)); |
1235 | memset(bufs, 0, sizeof(bufs)); | |
1236 | num_mids = 0; | |
1237 | ||
9bb17e09 PS |
1238 | if (server->ops->is_transform_hdr && |
1239 | server->ops->receive_transform && | |
1240 | server->ops->is_transform_hdr(buf)) { | |
1241 | length = server->ops->receive_transform(server, | |
b24df3e3 RS |
1242 | mids, |
1243 | bufs, | |
1244 | &num_mids); | |
9bb17e09 | 1245 | } else { |
b24df3e3 RS |
1246 | mids[0] = server->ops->find_mid(server, buf); |
1247 | bufs[0] = buf; | |
7af929d6 | 1248 | num_mids = 1; |
50c2f753 | 1249 | |
b24df3e3 RS |
1250 | if (!mids[0] || !mids[0]->receive) |
1251 | length = standard_receive3(server, mids[0]); | |
9bb17e09 | 1252 | else |
b24df3e3 | 1253 | length = mids[0]->receive(server, mids[0]); |
9bb17e09 | 1254 | } |
71823baf | 1255 | |
696e420b | 1256 | if (length < 0) { |
b24df3e3 RS |
1257 | for (i = 0; i < num_mids; i++) |
1258 | if (mids[i]) | |
1259 | cifs_mid_q_entry_release(mids[i]); | |
fe11e4cc | 1260 | continue; |
696e420b | 1261 | } |
1da177e4 | 1262 | |
fda35943 | 1263 | server->lstrp = jiffies; |
38bd4906 | 1264 | |
b24df3e3 RS |
1265 | for (i = 0; i < num_mids; i++) { |
1266 | if (mids[i] != NULL) { | |
1267 | mids[i]->resp_buf_size = server->pdu_size; | |
696e420b | 1268 | |
b24df3e3 RS |
1269 | if (!mids[i]->multiRsp || mids[i]->multiEnd) |
1270 | mids[i]->callback(mids[i]); | |
1271 | ||
1272 | cifs_mid_q_entry_release(mids[i]); | |
1273 | } else if (server->ops->is_oplock_break && | |
1274 | server->ops->is_oplock_break(bufs[i], | |
1275 | server)) { | |
eca00452 | 1276 | smb2_add_credits_from_hdr(bufs[i], server); |
b24df3e3 RS |
1277 | cifs_dbg(FYI, "Received oplock break\n"); |
1278 | } else { | |
afe6f653 | 1279 | cifs_server_dbg(VFS, "No task to wake, unknown frame " |
b24df3e3 RS |
1280 | "received! NumMids %d\n", |
1281 | atomic_read(&midCount)); | |
1282 | cifs_dump_mem("Received Data is: ", bufs[i], | |
1283 | HEADER_SIZE(server)); | |
3e272579 | 1284 | smb2_add_credits_from_hdr(bufs[i], server); |
3979877e | 1285 | #ifdef CONFIG_CIFS_DEBUG2 |
b24df3e3 RS |
1286 | if (server->ops->dump_detail) |
1287 | server->ops->dump_detail(bufs[i], | |
1288 | server); | |
1289 | cifs_dump_mids(server); | |
3979877e | 1290 | #endif /* CIFS_DEBUG2 */ |
b24df3e3 | 1291 | } |
8ce79ec3 | 1292 | } |
b24df3e3 | 1293 | |
8ce79ec3 RS |
1294 | if (pdu_length > server->pdu_size) { |
1295 | if (!allocate_buffers(server)) | |
1296 | continue; | |
1297 | pdu_length -= server->pdu_size; | |
1298 | server->total_read = 0; | |
1299 | server->large_buf = false; | |
1300 | buf = server->smallbuf; | |
1301 | goto next_pdu; | |
e4eb295d SF |
1302 | } |
1303 | } /* end while !EXITING */ | |
1304 | ||
fd62cb7e | 1305 | /* buffer usually freed in free_mid - need to free it here on exit */ |
2a37ef94 JL |
1306 | cifs_buf_release(server->bigbuf); |
1307 | if (server->smallbuf) /* no sense logging a debug message if NULL */ | |
1308 | cifs_small_buf_release(server->smallbuf); | |
1da177e4 | 1309 | |
a5c3e1c7 | 1310 | task_to_wake = xchg(&server->tsk, NULL); |
762dfd10 | 1311 | clean_demultiplex_info(server); |
a5c3e1c7 SF |
1312 | |
1313 | /* if server->tsk was NULL then wait for a signal before exiting */ | |
1314 | if (!task_to_wake) { | |
1315 | set_current_state(TASK_INTERRUPTIBLE); | |
1316 | while (!signal_pending(current)) { | |
1317 | schedule(); | |
1318 | set_current_state(TASK_INTERRUPTIBLE); | |
1319 | } | |
1320 | set_current_state(TASK_RUNNING); | |
1321 | } | |
1322 | ||
0468a2cf | 1323 | module_put_and_exit(0); |
1da177e4 LT |
1324 | } |
1325 | ||
c359cf3c JL |
1326 | /* extract the host portion of the UNC string */ |
1327 | static char * | |
1328 | extract_hostname(const char *unc) | |
1329 | { | |
1330 | const char *src; | |
1331 | char *dst, *delim; | |
1332 | unsigned int len; | |
1333 | ||
1334 | /* skip double chars at beginning of string */ | |
1335 | /* BB: check validity of these bytes? */ | |
c34fea5a PA |
1336 | if (strlen(unc) < 3) |
1337 | return ERR_PTR(-EINVAL); | |
1338 | for (src = unc; *src && *src == '\\'; src++) | |
1339 | ; | |
1340 | if (!*src) | |
1341 | return ERR_PTR(-EINVAL); | |
c359cf3c JL |
1342 | |
1343 | /* delimiter between hostname and sharename is always '\\' now */ | |
1344 | delim = strchr(src, '\\'); | |
1345 | if (!delim) | |
1346 | return ERR_PTR(-EINVAL); | |
1347 | ||
1348 | len = delim - src; | |
1349 | dst = kmalloc((len + 1), GFP_KERNEL); | |
1350 | if (dst == NULL) | |
1351 | return ERR_PTR(-ENOMEM); | |
1352 | ||
1353 | memcpy(dst, src, len); | |
1354 | dst[len] = '\0'; | |
1355 | ||
1356 | return dst; | |
1357 | } | |
1358 | ||
8830d7e0 SP |
1359 | static int get_option_ul(substring_t args[], unsigned long *option) |
1360 | { | |
1361 | int rc; | |
1362 | char *string; | |
1363 | ||
1364 | string = match_strdup(args); | |
1365 | if (string == NULL) | |
1366 | return -ENOMEM; | |
bfa890a3 | 1367 | rc = kstrtoul(string, 0, option); |
8830d7e0 SP |
1368 | kfree(string); |
1369 | ||
1370 | return rc; | |
1371 | } | |
1372 | ||
3da46565 EB |
1373 | static int get_option_uid(substring_t args[], kuid_t *result) |
1374 | { | |
1375 | unsigned long value; | |
1376 | kuid_t uid; | |
1377 | int rc; | |
1378 | ||
1379 | rc = get_option_ul(args, &value); | |
1380 | if (rc) | |
1381 | return rc; | |
1382 | ||
1383 | uid = make_kuid(current_user_ns(), value); | |
1384 | if (!uid_valid(uid)) | |
1385 | return -EINVAL; | |
1386 | ||
1387 | *result = uid; | |
1388 | return 0; | |
1389 | } | |
1390 | ||
1391 | static int get_option_gid(substring_t args[], kgid_t *result) | |
1392 | { | |
1393 | unsigned long value; | |
1394 | kgid_t gid; | |
1395 | int rc; | |
1396 | ||
1397 | rc = get_option_ul(args, &value); | |
1398 | if (rc) | |
1399 | return rc; | |
1400 | ||
1401 | gid = make_kgid(current_user_ns(), value); | |
1402 | if (!gid_valid(gid)) | |
1403 | return -EINVAL; | |
1404 | ||
1405 | *result = gid; | |
1406 | return 0; | |
1407 | } | |
8830d7e0 SP |
1408 | |
1409 | static int cifs_parse_security_flavors(char *value, | |
1410 | struct smb_vol *vol) | |
1411 | { | |
1412 | ||
1413 | substring_t args[MAX_OPT_ARGS]; | |
1414 | ||
1e3cc57e JL |
1415 | /* |
1416 | * With mount options, the last one should win. Reset any existing | |
1417 | * settings back to default. | |
1418 | */ | |
1419 | vol->sectype = Unspecified; | |
1420 | vol->sign = false; | |
1421 | ||
8830d7e0 | 1422 | switch (match_token(value, cifs_secflavor_tokens, args)) { |
3f618223 JL |
1423 | case Opt_sec_krb5p: |
1424 | cifs_dbg(VFS, "sec=krb5p is not supported!\n"); | |
1425 | return 1; | |
1426 | case Opt_sec_krb5i: | |
1427 | vol->sign = true; | |
1428 | /* Fallthrough */ | |
8830d7e0 | 1429 | case Opt_sec_krb5: |
1e3cc57e | 1430 | vol->sectype = Kerberos; |
8830d7e0 | 1431 | break; |
3f618223 | 1432 | case Opt_sec_ntlmsspi: |
1e3cc57e | 1433 | vol->sign = true; |
3f618223 | 1434 | /* Fallthrough */ |
8830d7e0 | 1435 | case Opt_sec_ntlmssp: |
1e3cc57e | 1436 | vol->sectype = RawNTLMSSP; |
8830d7e0 | 1437 | break; |
3f618223 | 1438 | case Opt_sec_ntlmi: |
1e3cc57e | 1439 | vol->sign = true; |
3f618223 | 1440 | /* Fallthrough */ |
8830d7e0 | 1441 | case Opt_ntlm: |
1e3cc57e | 1442 | vol->sectype = NTLM; |
8830d7e0 | 1443 | break; |
3f618223 | 1444 | case Opt_sec_ntlmv2i: |
1e3cc57e | 1445 | vol->sign = true; |
3f618223 | 1446 | /* Fallthrough */ |
7659624f | 1447 | case Opt_sec_ntlmv2: |
1e3cc57e | 1448 | vol->sectype = NTLMv2; |
8830d7e0 SP |
1449 | break; |
1450 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
1451 | case Opt_sec_lanman: | |
1e3cc57e | 1452 | vol->sectype = LANMAN; |
8830d7e0 SP |
1453 | break; |
1454 | #endif | |
1455 | case Opt_sec_none: | |
1456 | vol->nullauth = 1; | |
1457 | break; | |
1458 | default: | |
f96637be | 1459 | cifs_dbg(VFS, "bad security option: %s\n", value); |
8830d7e0 SP |
1460 | return 1; |
1461 | } | |
1462 | ||
1463 | return 0; | |
1464 | } | |
1465 | ||
15b6a473 JL |
1466 | static int |
1467 | cifs_parse_cache_flavor(char *value, struct smb_vol *vol) | |
1468 | { | |
1469 | substring_t args[MAX_OPT_ARGS]; | |
1470 | ||
1471 | switch (match_token(value, cifs_cacheflavor_tokens, args)) { | |
1472 | case Opt_cache_loose: | |
1473 | vol->direct_io = false; | |
1474 | vol->strict_io = false; | |
83bbfa70 | 1475 | vol->cache_ro = false; |
41e033fe | 1476 | vol->cache_rw = false; |
15b6a473 JL |
1477 | break; |
1478 | case Opt_cache_strict: | |
1479 | vol->direct_io = false; | |
1480 | vol->strict_io = true; | |
83bbfa70 | 1481 | vol->cache_ro = false; |
41e033fe | 1482 | vol->cache_rw = false; |
15b6a473 JL |
1483 | break; |
1484 | case Opt_cache_none: | |
1485 | vol->direct_io = true; | |
1486 | vol->strict_io = false; | |
83bbfa70 | 1487 | vol->cache_ro = false; |
41e033fe | 1488 | vol->cache_rw = false; |
83bbfa70 SF |
1489 | break; |
1490 | case Opt_cache_ro: | |
1491 | vol->direct_io = false; | |
1492 | vol->strict_io = false; | |
1493 | vol->cache_ro = true; | |
41e033fe SF |
1494 | vol->cache_rw = false; |
1495 | break; | |
1496 | case Opt_cache_rw: | |
1497 | vol->direct_io = false; | |
1498 | vol->strict_io = false; | |
1499 | vol->cache_ro = false; | |
1500 | vol->cache_rw = true; | |
15b6a473 JL |
1501 | break; |
1502 | default: | |
f96637be | 1503 | cifs_dbg(VFS, "bad cache= option: %s\n", value); |
15b6a473 JL |
1504 | return 1; |
1505 | } | |
1506 | return 0; | |
1507 | } | |
1508 | ||
23db65f5 | 1509 | static int |
c7c137b9 | 1510 | cifs_parse_smb_version(char *value, struct smb_vol *vol, bool is_smb3) |
23db65f5 JL |
1511 | { |
1512 | substring_t args[MAX_OPT_ARGS]; | |
1513 | ||
1514 | switch (match_token(value, cifs_smb_version_tokens, args)) { | |
7420451f | 1515 | #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY |
23db65f5 | 1516 | case Smb_1: |
f92a720e SF |
1517 | if (disable_legacy_dialects) { |
1518 | cifs_dbg(VFS, "mount with legacy dialect disabled\n"); | |
1519 | return 1; | |
1520 | } | |
c7c137b9 SF |
1521 | if (is_smb3) { |
1522 | cifs_dbg(VFS, "vers=1.0 (cifs) not permitted when mounting with smb3\n"); | |
1523 | return 1; | |
1524 | } | |
23db65f5 JL |
1525 | vol->ops = &smb1_operations; |
1526 | vol->vals = &smb1_values; | |
1527 | break; | |
dd446b16 | 1528 | case Smb_20: |
f92a720e SF |
1529 | if (disable_legacy_dialects) { |
1530 | cifs_dbg(VFS, "mount with legacy dialect disabled\n"); | |
1531 | return 1; | |
1532 | } | |
c7c137b9 SF |
1533 | if (is_smb3) { |
1534 | cifs_dbg(VFS, "vers=2.0 not permitted when mounting with smb3\n"); | |
1535 | return 1; | |
1536 | } | |
53ef1016 | 1537 | vol->ops = &smb20_operations; |
dd446b16 SF |
1538 | vol->vals = &smb20_values; |
1539 | break; | |
7420451f SF |
1540 | #else |
1541 | case Smb_1: | |
1542 | cifs_dbg(VFS, "vers=1.0 (cifs) mount not permitted when legacy dialects disabled\n"); | |
1543 | return 1; | |
1544 | case Smb_20: | |
1545 | cifs_dbg(VFS, "vers=2.0 mount not permitted when legacy dialects disabled\n"); | |
1546 | return 1; | |
1547 | #endif /* CIFS_ALLOW_INSECURE_LEGACY */ | |
1080ef75 SF |
1548 | case Smb_21: |
1549 | vol->ops = &smb21_operations; | |
1550 | vol->vals = &smb21_values; | |
1551 | break; | |
e4aa25e7 | 1552 | case Smb_30: |
38107d45 | 1553 | vol->ops = &smb30_operations; |
e4aa25e7 SF |
1554 | vol->vals = &smb30_values; |
1555 | break; | |
20b6d8b4 SF |
1556 | case Smb_302: |
1557 | vol->ops = &smb30_operations; /* currently identical with 3.0 */ | |
1558 | vol->vals = &smb302_values; | |
1559 | break; | |
5f7fbf73 | 1560 | case Smb_311: |
aab1893d | 1561 | vol->ops = &smb311_operations; |
5f7fbf73 SF |
1562 | vol->vals = &smb311_values; |
1563 | break; | |
9764c02f SF |
1564 | case Smb_3any: |
1565 | vol->ops = &smb30_operations; /* currently identical with 3.0 */ | |
1566 | vol->vals = &smb3any_values; | |
1567 | break; | |
1568 | case Smb_default: | |
1569 | vol->ops = &smb30_operations; /* currently identical with 3.0 */ | |
1570 | vol->vals = &smbdefault_values; | |
1571 | break; | |
23db65f5 | 1572 | default: |
f96637be | 1573 | cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value); |
23db65f5 JL |
1574 | return 1; |
1575 | } | |
1576 | return 0; | |
1577 | } | |
1578 | ||
d387a5c5 JL |
1579 | /* |
1580 | * Parse a devname into substrings and populate the vol->UNC and vol->prepath | |
1581 | * fields with the result. Returns 0 on success and an error otherwise. | |
1582 | */ | |
1583 | static int | |
1584 | cifs_parse_devname(const char *devname, struct smb_vol *vol) | |
1585 | { | |
1586 | char *pos; | |
1587 | const char *delims = "/\\"; | |
1588 | size_t len; | |
1589 | ||
68e2672f YL |
1590 | if (unlikely(!devname || !*devname)) { |
1591 | cifs_dbg(VFS, "Device name not specified.\n"); | |
1592 | return -EINVAL; | |
1593 | } | |
1594 | ||
d387a5c5 JL |
1595 | /* make sure we have a valid UNC double delimiter prefix */ |
1596 | len = strspn(devname, delims); | |
1597 | if (len != 2) | |
1598 | return -EINVAL; | |
1599 | ||
1600 | /* find delimiter between host and sharename */ | |
1601 | pos = strpbrk(devname + 2, delims); | |
1602 | if (!pos) | |
1603 | return -EINVAL; | |
1604 | ||
1605 | /* skip past delimiter */ | |
1606 | ++pos; | |
1607 | ||
1608 | /* now go until next delimiter or end of string */ | |
1609 | len = strcspn(pos, delims); | |
1610 | ||
1611 | /* move "pos" up to delimiter or NULL */ | |
1612 | pos += len; | |
1613 | vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL); | |
1614 | if (!vol->UNC) | |
1615 | return -ENOMEM; | |
1616 | ||
1617 | convert_delimiter(vol->UNC, '\\'); | |
1618 | ||
11e31647 SP |
1619 | /* skip any delimiter */ |
1620 | if (*pos == '/' || *pos == '\\') | |
1621 | pos++; | |
1622 | ||
1623 | /* If pos is NULL then no prepath */ | |
1624 | if (!*pos) | |
d387a5c5 JL |
1625 | return 0; |
1626 | ||
1627 | vol->prepath = kstrdup(pos, GFP_KERNEL); | |
1628 | if (!vol->prepath) | |
1629 | return -ENOMEM; | |
1630 | ||
1631 | return 0; | |
1632 | } | |
1633 | ||
1da177e4 | 1634 | static int |
b946845a | 1635 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
c7c137b9 | 1636 | struct smb_vol *vol, bool is_smb3) |
1da177e4 | 1637 | { |
8830d7e0 | 1638 | char *data, *end; |
957df453 | 1639 | char *mountdata_copy = NULL, *options; |
1da177e4 LT |
1640 | unsigned int temp_len, i, j; |
1641 | char separator[2]; | |
9b9d6b24 JL |
1642 | short int override_uid = -1; |
1643 | short int override_gid = -1; | |
1644 | bool uid_specified = false; | |
1645 | bool gid_specified = false; | |
d8162558 JL |
1646 | bool sloppy = false; |
1647 | char *invalid = NULL; | |
88463999 | 1648 | char *nodename = utsname()->nodename; |
8830d7e0 SP |
1649 | char *string = NULL; |
1650 | char *tmp_end, *value; | |
1651 | char delim; | |
b979aaa1 | 1652 | bool got_ip = false; |
7e682f76 | 1653 | bool got_version = false; |
b979aaa1 JL |
1654 | unsigned short port = 0; |
1655 | struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr; | |
1da177e4 LT |
1656 | |
1657 | separator[0] = ','; | |
50c2f753 | 1658 | separator[1] = 0; |
8830d7e0 | 1659 | delim = separator[0]; |
1da177e4 | 1660 | |
6ee9542a JL |
1661 | /* ensure we always start with zeroed-out smb_vol */ |
1662 | memset(vol, 0, sizeof(*vol)); | |
1663 | ||
88463999 JL |
1664 | /* |
1665 | * does not have to be perfect mapping since field is | |
1666 | * informational, only used for servers that do not support | |
1667 | * port 445 and it can be overridden at mount time | |
1668 | */ | |
1397f2ee JL |
1669 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
1670 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) | |
88463999 JL |
1671 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
1672 | ||
1397f2ee | 1673 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
a10faeb2 SF |
1674 | /* null target name indicates to use *SMBSERVR default called name |
1675 | if we end up sending RFC1001 session initialize */ | |
1676 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
1677 | vol->cred_uid = current_uid(); |
1678 | vol->linux_uid = current_uid(); | |
a001e5b5 | 1679 | vol->linux_gid = current_gid(); |
e8506d25 | 1680 | vol->bsize = 1024 * 1024; /* can improve cp performance significantly */ |
2baa2682 SF |
1681 | /* |
1682 | * default to SFM style remapping of seven reserved characters | |
1683 | * unless user overrides it or we negotiate CIFS POSIX where | |
1684 | * it is unnecessary. Can not simultaneously use more than one mapping | |
1685 | * since then readdir could list files that open could not open | |
1686 | */ | |
1687 | vol->remap = true; | |
1688 | ||
f55ed1a8 JL |
1689 | /* default to only allowing write access to owner of the mount */ |
1690 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
1691 | |
1692 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
1693 | /* default is always to request posix paths. */ |
1694 | vol->posix_paths = 1; | |
a0c9217f JL |
1695 | /* default to using server inode numbers where available */ |
1696 | vol->server_ino = 1; | |
ac67055e | 1697 | |
1b359204 JL |
1698 | /* default is to use strict cifs caching semantics */ |
1699 | vol->strict_io = true; | |
1700 | ||
6d20e840 SJ |
1701 | vol->actimeo = CIFS_DEF_ACTIMEO; |
1702 | ||
ca567eb2 SF |
1703 | /* Most clients set timeout to 0, allows server to use its default */ |
1704 | vol->handle_timeout = 0; /* See MS-SMB2 spec section 2.2.14.2.12 */ | |
1705 | ||
9764c02f SF |
1706 | /* offer SMB2.1 and later (SMB3 etc). Secure and widely accepted */ |
1707 | vol->ops = &smb30_operations; | |
1708 | vol->vals = &smbdefault_values; | |
23db65f5 | 1709 | |
b782fcc1 RV |
1710 | vol->echo_interval = SMB_ECHO_INTERVAL_DEFAULT; |
1711 | ||
bcc88801 AA |
1712 | /* default to no multichannel (single server connection) */ |
1713 | vol->multichannel = false; | |
1714 | vol->max_channels = 1; | |
1715 | ||
b946845a SF |
1716 | if (!mountdata) |
1717 | goto cifs_parse_mount_err; | |
1718 | ||
1719 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); | |
1720 | if (!mountdata_copy) | |
1721 | goto cifs_parse_mount_err; | |
1da177e4 | 1722 | |
b946845a | 1723 | options = mountdata_copy; |
4906e50b | 1724 | end = options + strlen(options); |
8830d7e0 | 1725 | |
50c2f753 | 1726 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 1727 | if (options[4] != 0) { |
1da177e4 LT |
1728 | separator[0] = options[4]; |
1729 | options += 5; | |
1730 | } else { | |
f96637be | 1731 | cifs_dbg(FYI, "Null separator not allowed\n"); |
1da177e4 LT |
1732 | } |
1733 | } | |
3d3ea8e6 SP |
1734 | vol->backupuid_specified = false; /* no backup intent for a user */ |
1735 | vol->backupgid_specified = false; /* no backup intent for a group */ | |
50c2f753 | 1736 | |
37d4f99b JL |
1737 | switch (cifs_parse_devname(devname, vol)) { |
1738 | case 0: | |
1739 | break; | |
1740 | case -ENOMEM: | |
1741 | cifs_dbg(VFS, "Unable to allocate memory for devname.\n"); | |
1742 | goto cifs_parse_mount_err; | |
1743 | case -EINVAL: | |
1744 | cifs_dbg(VFS, "Malformed UNC in devname.\n"); | |
1745 | goto cifs_parse_mount_err; | |
1746 | default: | |
1747 | cifs_dbg(VFS, "Unknown error parsing devname.\n"); | |
1748 | goto cifs_parse_mount_err; | |
d387a5c5 JL |
1749 | } |
1750 | ||
1da177e4 | 1751 | while ((data = strsep(&options, separator)) != NULL) { |
8830d7e0 SP |
1752 | substring_t args[MAX_OPT_ARGS]; |
1753 | unsigned long option; | |
1754 | int token; | |
1755 | ||
1da177e4 LT |
1756 | if (!*data) |
1757 | continue; | |
1da177e4 | 1758 | |
8830d7e0 SP |
1759 | token = match_token(data, cifs_mount_option_tokens, args); |
1760 | ||
1761 | switch (token) { | |
1762 | ||
1763 | /* Ingnore the following */ | |
1764 | case Opt_ignore: | |
1765 | break; | |
1766 | ||
1767 | /* Boolean values */ | |
1768 | case Opt_user_xattr: | |
1da177e4 | 1769 | vol->no_xattr = 0; |
8830d7e0 SP |
1770 | break; |
1771 | case Opt_nouser_xattr: | |
1da177e4 | 1772 | vol->no_xattr = 1; |
8830d7e0 SP |
1773 | break; |
1774 | case Opt_forceuid: | |
9b9d6b24 | 1775 | override_uid = 1; |
8830d7e0 SP |
1776 | break; |
1777 | case Opt_noforceuid: | |
9b9d6b24 | 1778 | override_uid = 0; |
8830d7e0 | 1779 | break; |
72bd481f JL |
1780 | case Opt_forcegid: |
1781 | override_gid = 1; | |
1782 | break; | |
1783 | case Opt_noforcegid: | |
1784 | override_gid = 0; | |
1785 | break; | |
8830d7e0 | 1786 | case Opt_noblocksend: |
edf1ae40 | 1787 | vol->noblocksnd = 1; |
8830d7e0 SP |
1788 | break; |
1789 | case Opt_noautotune: | |
edf1ae40 | 1790 | vol->noautotune = 1; |
8830d7e0 | 1791 | break; |
3e7a02d4 SF |
1792 | case Opt_nolease: |
1793 | vol->no_lease = 1; | |
1794 | break; | |
8830d7e0 | 1795 | case Opt_hard: |
1da177e4 | 1796 | vol->retry = 1; |
8830d7e0 SP |
1797 | break; |
1798 | case Opt_soft: | |
1da177e4 | 1799 | vol->retry = 0; |
8830d7e0 SP |
1800 | break; |
1801 | case Opt_perm: | |
1da177e4 | 1802 | vol->noperm = 0; |
8830d7e0 SP |
1803 | break; |
1804 | case Opt_noperm: | |
1da177e4 | 1805 | vol->noperm = 1; |
8830d7e0 SP |
1806 | break; |
1807 | case Opt_mapchars: | |
2baa2682 SF |
1808 | vol->sfu_remap = true; |
1809 | vol->remap = false; /* disable SFM mapping */ | |
8830d7e0 SP |
1810 | break; |
1811 | case Opt_nomapchars: | |
2baa2682 SF |
1812 | vol->sfu_remap = false; |
1813 | break; | |
1814 | case Opt_mapposix: | |
1815 | vol->remap = true; | |
1816 | vol->sfu_remap = false; /* disable SFU mapping */ | |
1817 | break; | |
1818 | case Opt_nomapposix: | |
1819 | vol->remap = false; | |
8830d7e0 SP |
1820 | break; |
1821 | case Opt_sfu: | |
50c2f753 | 1822 | vol->sfu_emul = 1; |
8830d7e0 SP |
1823 | break; |
1824 | case Opt_nosfu: | |
50c2f753 | 1825 | vol->sfu_emul = 0; |
8830d7e0 SP |
1826 | break; |
1827 | case Opt_nodfs: | |
2c1b8615 | 1828 | vol->nodfs = 1; |
8830d7e0 | 1829 | break; |
8eecd1c2 PAS |
1830 | case Opt_rootfs: |
1831 | #ifdef CONFIG_CIFS_ROOT | |
1832 | vol->rootfs = true; | |
1833 | #endif | |
1834 | break; | |
8830d7e0 | 1835 | case Opt_posixpaths: |
ac67055e | 1836 | vol->posix_paths = 1; |
8830d7e0 SP |
1837 | break; |
1838 | case Opt_noposixpaths: | |
ac67055e | 1839 | vol->posix_paths = 0; |
8830d7e0 SP |
1840 | break; |
1841 | case Opt_nounix: | |
b326614e SF |
1842 | if (vol->linux_ext) |
1843 | cifs_dbg(VFS, | |
1844 | "conflicting unix mount options\n"); | |
c18c842b | 1845 | vol->no_linux_ext = 1; |
8830d7e0 | 1846 | break; |
b326614e SF |
1847 | case Opt_unix: |
1848 | if (vol->no_linux_ext) | |
1849 | cifs_dbg(VFS, | |
1850 | "conflicting unix mount options\n"); | |
1851 | vol->linux_ext = 1; | |
1852 | break; | |
8830d7e0 | 1853 | case Opt_nocase: |
50c2f753 | 1854 | vol->nocase = 1; |
8830d7e0 SP |
1855 | break; |
1856 | case Opt_brl: | |
c46fa8ac | 1857 | vol->nobrl = 0; |
8830d7e0 SP |
1858 | break; |
1859 | case Opt_nobrl: | |
c46fa8ac | 1860 | vol->nobrl = 1; |
5cfdddcf PS |
1861 | /* |
1862 | * turn off mandatory locking in mode | |
8830d7e0 | 1863 | * if remote locking is turned off since the |
5cfdddcf PS |
1864 | * local vfs will do advisory |
1865 | */ | |
50c2f753 SF |
1866 | if (vol->file_mode == |
1867 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1868 | vol->file_mode = S_IALLUGO; |
8830d7e0 | 1869 | break; |
3d4ef9a1 SF |
1870 | case Opt_nohandlecache: |
1871 | vol->nohandlecache = 1; | |
1872 | break; | |
1873 | case Opt_handlecache: | |
1874 | vol->nohandlecache = 0; | |
1875 | break; | |
8830d7e0 | 1876 | case Opt_forcemandatorylock: |
13a6e42a | 1877 | vol->mand_lock = 1; |
8830d7e0 SP |
1878 | break; |
1879 | case Opt_setuids: | |
1da177e4 | 1880 | vol->setuids = 1; |
8830d7e0 SP |
1881 | break; |
1882 | case Opt_nosetuids: | |
1da177e4 | 1883 | vol->setuids = 0; |
8830d7e0 | 1884 | break; |
95932655 SF |
1885 | case Opt_setuidfromacl: |
1886 | vol->setuidfromacl = 1; | |
1887 | break; | |
8830d7e0 | 1888 | case Opt_dynperm: |
d0a9c078 | 1889 | vol->dynperm = true; |
8830d7e0 SP |
1890 | break; |
1891 | case Opt_nodynperm: | |
d0a9c078 | 1892 | vol->dynperm = false; |
8830d7e0 SP |
1893 | break; |
1894 | case Opt_nohard: | |
1da177e4 | 1895 | vol->retry = 0; |
8830d7e0 SP |
1896 | break; |
1897 | case Opt_nosoft: | |
1da177e4 | 1898 | vol->retry = 1; |
8830d7e0 SP |
1899 | break; |
1900 | case Opt_nointr: | |
1da177e4 | 1901 | vol->intr = 0; |
8830d7e0 SP |
1902 | break; |
1903 | case Opt_intr: | |
1da177e4 | 1904 | vol->intr = 1; |
8830d7e0 SP |
1905 | break; |
1906 | case Opt_nostrictsync: | |
be652445 | 1907 | vol->nostrictsync = 1; |
8830d7e0 SP |
1908 | break; |
1909 | case Opt_strictsync: | |
be652445 | 1910 | vol->nostrictsync = 0; |
8830d7e0 SP |
1911 | break; |
1912 | case Opt_serverino: | |
1da177e4 | 1913 | vol->server_ino = 1; |
8830d7e0 SP |
1914 | break; |
1915 | case Opt_noserverino: | |
1da177e4 | 1916 | vol->server_ino = 0; |
8830d7e0 SP |
1917 | break; |
1918 | case Opt_rwpidforward: | |
d4ffff1f | 1919 | vol->rwpidforward = 1; |
8830d7e0 | 1920 | break; |
412094a8 SF |
1921 | case Opt_modesid: |
1922 | vol->mode_ace = 1; | |
1923 | break; | |
8830d7e0 | 1924 | case Opt_cifsacl: |
0a4b92c0 | 1925 | vol->cifs_acl = 1; |
8830d7e0 SP |
1926 | break; |
1927 | case Opt_nocifsacl: | |
0a4b92c0 | 1928 | vol->cifs_acl = 0; |
8830d7e0 SP |
1929 | break; |
1930 | case Opt_acl: | |
1da177e4 | 1931 | vol->no_psx_acl = 0; |
8830d7e0 SP |
1932 | break; |
1933 | case Opt_noacl: | |
1da177e4 | 1934 | vol->no_psx_acl = 1; |
8830d7e0 SP |
1935 | break; |
1936 | case Opt_locallease: | |
84210e91 | 1937 | vol->local_lease = 1; |
8830d7e0 SP |
1938 | break; |
1939 | case Opt_sign: | |
1e3cc57e | 1940 | vol->sign = true; |
8830d7e0 | 1941 | break; |
4f5c10f1 SF |
1942 | case Opt_ignore_signature: |
1943 | vol->sign = true; | |
1944 | vol->ignore_signature = true; | |
1945 | break; | |
8830d7e0 | 1946 | case Opt_seal: |
95b1cb90 | 1947 | /* we do not do the following in secFlags because seal |
8830d7e0 SP |
1948 | * is a per tree connection (mount) not a per socket |
1949 | * or per-smb connection option in the protocol | |
1950 | * vol->secFlg |= CIFSSEC_MUST_SEAL; | |
1951 | */ | |
95b1cb90 | 1952 | vol->seal = 1; |
8830d7e0 | 1953 | break; |
8830d7e0 | 1954 | case Opt_noac: |
0b456f04 | 1955 | pr_warn("CIFS: Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n"); |
8830d7e0 SP |
1956 | break; |
1957 | case Opt_fsc: | |
607a569d | 1958 | #ifndef CONFIG_CIFS_FSCACHE |
f96637be | 1959 | cifs_dbg(VFS, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n"); |
b946845a | 1960 | goto cifs_parse_mount_err; |
607a569d | 1961 | #endif |
fa1df75d | 1962 | vol->fsc = true; |
8830d7e0 SP |
1963 | break; |
1964 | case Opt_mfsymlinks: | |
736a3320 | 1965 | vol->mfsymlinks = true; |
8830d7e0 SP |
1966 | break; |
1967 | case Opt_multiuser: | |
0eb8a132 | 1968 | vol->multiuser = true; |
8830d7e0 | 1969 | break; |
d8162558 JL |
1970 | case Opt_sloppy: |
1971 | sloppy = true; | |
1972 | break; | |
a0b3df5c JL |
1973 | case Opt_nosharesock: |
1974 | vol->nosharesock = true; | |
1975 | break; | |
b2a30774 SF |
1976 | case Opt_nopersistent: |
1977 | vol->nopersistent = true; | |
1978 | if (vol->persistent) { | |
1979 | cifs_dbg(VFS, | |
1980 | "persistenthandles mount options conflict\n"); | |
1981 | goto cifs_parse_mount_err; | |
1982 | } | |
1983 | break; | |
1984 | case Opt_persistent: | |
1985 | vol->persistent = true; | |
592fafe6 | 1986 | if ((vol->nopersistent) || (vol->resilient)) { |
b2a30774 SF |
1987 | cifs_dbg(VFS, |
1988 | "persistenthandles mount options conflict\n"); | |
1989 | goto cifs_parse_mount_err; | |
1990 | } | |
1991 | break; | |
592fafe6 SF |
1992 | case Opt_resilient: |
1993 | vol->resilient = true; | |
1994 | if (vol->persistent) { | |
1995 | cifs_dbg(VFS, | |
1996 | "persistenthandles mount options conflict\n"); | |
1997 | goto cifs_parse_mount_err; | |
1998 | } | |
1999 | break; | |
2000 | case Opt_noresilient: | |
2001 | vol->resilient = false; /* already the default */ | |
2002 | break; | |
39566443 GP |
2003 | case Opt_domainauto: |
2004 | vol->domainauto = true; | |
2005 | break; | |
8339dd32 LL |
2006 | case Opt_rdma: |
2007 | vol->rdma = true; | |
2008 | break; | |
bcc88801 AA |
2009 | case Opt_multichannel: |
2010 | vol->multichannel = true; | |
2011 | break; | |
2012 | case Opt_nomultichannel: | |
2013 | vol->multichannel = false; | |
2014 | break; | |
9fe5ff1c SF |
2015 | case Opt_compress: |
2016 | vol->compression = UNKNOWN_TYPE; | |
2017 | cifs_dbg(VFS, | |
2018 | "SMB3 compression support is experimental\n"); | |
2019 | break; | |
8830d7e0 SP |
2020 | |
2021 | /* Numeric Values */ | |
2022 | case Opt_backupuid: | |
3da46565 | 2023 | if (get_option_uid(args, &vol->backupuid)) { |
f96637be JP |
2024 | cifs_dbg(VFS, "%s: Invalid backupuid value\n", |
2025 | __func__); | |
3d3ea8e6 SP |
2026 | goto cifs_parse_mount_err; |
2027 | } | |
2028 | vol->backupuid_specified = true; | |
8830d7e0 SP |
2029 | break; |
2030 | case Opt_backupgid: | |
3da46565 | 2031 | if (get_option_gid(args, &vol->backupgid)) { |
f96637be JP |
2032 | cifs_dbg(VFS, "%s: Invalid backupgid value\n", |
2033 | __func__); | |
3d3ea8e6 SP |
2034 | goto cifs_parse_mount_err; |
2035 | } | |
2036 | vol->backupgid_specified = true; | |
8830d7e0 SP |
2037 | break; |
2038 | case Opt_uid: | |
3da46565 | 2039 | if (get_option_uid(args, &vol->linux_uid)) { |
f96637be JP |
2040 | cifs_dbg(VFS, "%s: Invalid uid value\n", |
2041 | __func__); | |
8830d7e0 SP |
2042 | goto cifs_parse_mount_err; |
2043 | } | |
8830d7e0 SP |
2044 | uid_specified = true; |
2045 | break; | |
2046 | case Opt_cruid: | |
3da46565 | 2047 | if (get_option_uid(args, &vol->cred_uid)) { |
f96637be JP |
2048 | cifs_dbg(VFS, "%s: Invalid cruid value\n", |
2049 | __func__); | |
8830d7e0 SP |
2050 | goto cifs_parse_mount_err; |
2051 | } | |
8830d7e0 SP |
2052 | break; |
2053 | case Opt_gid: | |
3da46565 | 2054 | if (get_option_gid(args, &vol->linux_gid)) { |
f96637be JP |
2055 | cifs_dbg(VFS, "%s: Invalid gid value\n", |
2056 | __func__); | |
8830d7e0 SP |
2057 | goto cifs_parse_mount_err; |
2058 | } | |
8830d7e0 SP |
2059 | gid_specified = true; |
2060 | break; | |
2061 | case Opt_file_mode: | |
2062 | if (get_option_ul(args, &option)) { | |
f96637be JP |
2063 | cifs_dbg(VFS, "%s: Invalid file_mode value\n", |
2064 | __func__); | |
8830d7e0 SP |
2065 | goto cifs_parse_mount_err; |
2066 | } | |
2067 | vol->file_mode = option; | |
2068 | break; | |
2069 | case Opt_dirmode: | |
2070 | if (get_option_ul(args, &option)) { | |
f96637be JP |
2071 | cifs_dbg(VFS, "%s: Invalid dir_mode value\n", |
2072 | __func__); | |
8830d7e0 SP |
2073 | goto cifs_parse_mount_err; |
2074 | } | |
2075 | vol->dir_mode = option; | |
2076 | break; | |
2077 | case Opt_port: | |
b979aaa1 JL |
2078 | if (get_option_ul(args, &option) || |
2079 | option > USHRT_MAX) { | |
f96637be JP |
2080 | cifs_dbg(VFS, "%s: Invalid port value\n", |
2081 | __func__); | |
8830d7e0 SP |
2082 | goto cifs_parse_mount_err; |
2083 | } | |
b979aaa1 | 2084 | port = (unsigned short)option; |
8830d7e0 | 2085 | break; |
563317ec SF |
2086 | case Opt_min_enc_offload: |
2087 | if (get_option_ul(args, &option)) { | |
2088 | cifs_dbg(VFS, "Invalid minimum encrypted read offload size (esize)\n"); | |
2089 | goto cifs_parse_mount_err; | |
2090 | } | |
2091 | vol->min_offload = option; | |
2092 | break; | |
e8506d25 SF |
2093 | case Opt_blocksize: |
2094 | if (get_option_ul(args, &option)) { | |
2095 | cifs_dbg(VFS, "%s: Invalid blocksize value\n", | |
2096 | __func__); | |
2097 | goto cifs_parse_mount_err; | |
2098 | } | |
2099 | /* | |
2100 | * inode blocksize realistically should never need to be | |
2101 | * less than 16K or greater than 16M and default is 1MB. | |
2102 | * Note that small inode block sizes (e.g. 64K) can lead | |
2103 | * to very poor performance of common tools like cp and scp | |
2104 | */ | |
2105 | if ((option < CIFS_MAX_MSGSIZE) || | |
2106 | (option > (4 * SMB3_DEFAULT_IOSIZE))) { | |
2107 | cifs_dbg(VFS, "%s: Invalid blocksize\n", | |
2108 | __func__); | |
2109 | goto cifs_parse_mount_err; | |
2110 | } | |
2111 | vol->bsize = option; | |
2112 | break; | |
8830d7e0 SP |
2113 | case Opt_rsize: |
2114 | if (get_option_ul(args, &option)) { | |
f96637be JP |
2115 | cifs_dbg(VFS, "%s: Invalid rsize value\n", |
2116 | __func__); | |
b946845a | 2117 | goto cifs_parse_mount_err; |
8830d7e0 SP |
2118 | } |
2119 | vol->rsize = option; | |
2120 | break; | |
2121 | case Opt_wsize: | |
2122 | if (get_option_ul(args, &option)) { | |
f96637be JP |
2123 | cifs_dbg(VFS, "%s: Invalid wsize value\n", |
2124 | __func__); | |
8830d7e0 SP |
2125 | goto cifs_parse_mount_err; |
2126 | } | |
2127 | vol->wsize = option; | |
2128 | break; | |
2129 | case Opt_actimeo: | |
2130 | if (get_option_ul(args, &option)) { | |
f96637be JP |
2131 | cifs_dbg(VFS, "%s: Invalid actimeo value\n", |
2132 | __func__); | |
8830d7e0 SP |
2133 | goto cifs_parse_mount_err; |
2134 | } | |
2135 | vol->actimeo = HZ * option; | |
2136 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { | |
f96637be | 2137 | cifs_dbg(VFS, "attribute cache timeout too large\n"); |
8830d7e0 SP |
2138 | goto cifs_parse_mount_err; |
2139 | } | |
2140 | break; | |
ca567eb2 SF |
2141 | case Opt_handletimeout: |
2142 | if (get_option_ul(args, &option)) { | |
2143 | cifs_dbg(VFS, "%s: Invalid handletimeout value\n", | |
2144 | __func__); | |
2145 | goto cifs_parse_mount_err; | |
2146 | } | |
2147 | vol->handle_timeout = option; | |
2148 | if (vol->handle_timeout > SMB3_MAX_HANDLE_TIMEOUT) { | |
2149 | cifs_dbg(VFS, "Invalid handle cache timeout, longer than 16 minutes\n"); | |
2150 | goto cifs_parse_mount_err; | |
2151 | } | |
2152 | break; | |
adfeb3e0 SF |
2153 | case Opt_echo_interval: |
2154 | if (get_option_ul(args, &option)) { | |
2155 | cifs_dbg(VFS, "%s: Invalid echo interval value\n", | |
2156 | __func__); | |
2157 | goto cifs_parse_mount_err; | |
2158 | } | |
2159 | vol->echo_interval = option; | |
2160 | break; | |
8b217fe7 SF |
2161 | case Opt_snapshot: |
2162 | if (get_option_ul(args, &option)) { | |
2163 | cifs_dbg(VFS, "%s: Invalid snapshot time\n", | |
2164 | __func__); | |
2165 | goto cifs_parse_mount_err; | |
2166 | } | |
2167 | vol->snapshot_time = option; | |
2168 | break; | |
141891f4 SF |
2169 | case Opt_max_credits: |
2170 | if (get_option_ul(args, &option) || (option < 20) || | |
2171 | (option > 60000)) { | |
2172 | cifs_dbg(VFS, "%s: Invalid max_credits value\n", | |
2173 | __func__); | |
2174 | goto cifs_parse_mount_err; | |
2175 | } | |
2176 | vol->max_credits = option; | |
2177 | break; | |
bcc88801 AA |
2178 | case Opt_max_channels: |
2179 | if (get_option_ul(args, &option) || option < 1 || | |
2180 | option > CIFS_MAX_CHANNELS) { | |
2181 | cifs_dbg(VFS, "%s: Invalid max_channels value, needs to be 1-%d\n", | |
2182 | __func__, CIFS_MAX_CHANNELS); | |
2183 | goto cifs_parse_mount_err; | |
2184 | } | |
2185 | vol->max_channels = option; | |
2186 | break; | |
8830d7e0 SP |
2187 | |
2188 | /* String Arguments */ | |
2189 | ||
4fe9e963 SP |
2190 | case Opt_blank_user: |
2191 | /* null user, ie. anonymous authentication */ | |
2192 | vol->nullauth = 1; | |
2193 | vol->username = NULL; | |
2194 | break; | |
8830d7e0 SP |
2195 | case Opt_user: |
2196 | string = match_strdup(args); | |
2197 | if (string == NULL) | |
2198 | goto out_nomem; | |
2199 | ||
8c3a2b4c SL |
2200 | if (strnlen(string, CIFS_MAX_USERNAME_LEN) > |
2201 | CIFS_MAX_USERNAME_LEN) { | |
0b456f04 | 2202 | pr_warn("CIFS: username too long\n"); |
8830d7e0 SP |
2203 | goto cifs_parse_mount_err; |
2204 | } | |
2bd50fb3 TK |
2205 | |
2206 | kfree(vol->username); | |
8830d7e0 | 2207 | vol->username = kstrdup(string, GFP_KERNEL); |
f96637be | 2208 | if (!vol->username) |
8830d7e0 | 2209 | goto cifs_parse_mount_err; |
8830d7e0 SP |
2210 | break; |
2211 | case Opt_blank_pass: | |
8830d7e0 SP |
2212 | /* passwords have to be handled differently |
2213 | * to allow the character used for deliminator | |
2214 | * to be passed within them | |
2215 | */ | |
2216 | ||
c369c9a4 SP |
2217 | /* |
2218 | * Check if this is a case where the password | |
2219 | * starts with a delimiter | |
2220 | */ | |
2221 | tmp_end = strchr(data, '='); | |
2222 | tmp_end++; | |
2223 | if (!(tmp_end < end && tmp_end[1] == delim)) { | |
2224 | /* No it is not. Set the password to NULL */ | |
97f4b727 | 2225 | kzfree(vol->password); |
c369c9a4 SP |
2226 | vol->password = NULL; |
2227 | break; | |
2228 | } | |
07fa6010 | 2229 | /* Fallthrough - to Opt_pass below.*/ |
c369c9a4 | 2230 | case Opt_pass: |
8830d7e0 SP |
2231 | /* Obtain the value string */ |
2232 | value = strchr(data, '='); | |
10238074 | 2233 | value++; |
8830d7e0 SP |
2234 | |
2235 | /* Set tmp_end to end of the string */ | |
2236 | tmp_end = (char *) value + strlen(value); | |
2237 | ||
2238 | /* Check if following character is the deliminator | |
2239 | * If yes, we have encountered a double deliminator | |
2240 | * reset the NULL character to the deliminator | |
2241 | */ | |
e73f843a | 2242 | if (tmp_end < end && tmp_end[1] == delim) { |
8830d7e0 SP |
2243 | tmp_end[0] = delim; |
2244 | ||
e73f843a SJ |
2245 | /* Keep iterating until we get to a single |
2246 | * deliminator OR the end | |
2247 | */ | |
2248 | while ((tmp_end = strchr(tmp_end, delim)) | |
2249 | != NULL && (tmp_end[1] == delim)) { | |
2250 | tmp_end = (char *) &tmp_end[2]; | |
2251 | } | |
2252 | ||
2253 | /* Reset var options to point to next element */ | |
2254 | if (tmp_end) { | |
2255 | tmp_end[0] = '\0'; | |
2256 | options = (char *) &tmp_end[1]; | |
2257 | } else | |
2258 | /* Reached the end of the mount option | |
2259 | * string */ | |
2260 | options = end; | |
8830d7e0 SP |
2261 | } |
2262 | ||
97f4b727 | 2263 | kzfree(vol->password); |
8830d7e0 SP |
2264 | /* Now build new password string */ |
2265 | temp_len = strlen(value); | |
2266 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); | |
2267 | if (vol->password == NULL) { | |
0b456f04 | 2268 | pr_warn("CIFS: no memory for password\n"); |
8830d7e0 SP |
2269 | goto cifs_parse_mount_err; |
2270 | } | |
2271 | ||
2272 | for (i = 0, j = 0; i < temp_len; i++, j++) { | |
2273 | vol->password[j] = value[i]; | |
2274 | if ((value[i] == delim) && | |
2275 | value[i+1] == delim) | |
2276 | /* skip the second deliminator */ | |
2277 | i++; | |
2278 | } | |
2279 | vol->password[j] = '\0'; | |
2280 | break; | |
4fe9e963 | 2281 | case Opt_blank_ip: |
b979aaa1 JL |
2282 | /* FIXME: should this be an error instead? */ |
2283 | got_ip = false; | |
4fe9e963 | 2284 | break; |
8830d7e0 SP |
2285 | case Opt_ip: |
2286 | string = match_strdup(args); | |
2287 | if (string == NULL) | |
2288 | goto out_nomem; | |
2289 | ||
b979aaa1 JL |
2290 | if (!cifs_convert_address(dstaddr, string, |
2291 | strlen(string))) { | |
0b456f04 | 2292 | pr_err("CIFS: bad ip= option (%s).\n", string); |
8830d7e0 SP |
2293 | goto cifs_parse_mount_err; |
2294 | } | |
b979aaa1 | 2295 | got_ip = true; |
8830d7e0 | 2296 | break; |
8830d7e0 SP |
2297 | case Opt_domain: |
2298 | string = match_strdup(args); | |
2299 | if (string == NULL) | |
2300 | goto out_nomem; | |
2301 | ||
057d6332 CG |
2302 | if (strnlen(string, CIFS_MAX_DOMAINNAME_LEN) |
2303 | == CIFS_MAX_DOMAINNAME_LEN) { | |
0b456f04 | 2304 | pr_warn("CIFS: domain name too long\n"); |
8830d7e0 SP |
2305 | goto cifs_parse_mount_err; |
2306 | } | |
2307 | ||
2bd50fb3 | 2308 | kfree(vol->domainname); |
8830d7e0 SP |
2309 | vol->domainname = kstrdup(string, GFP_KERNEL); |
2310 | if (!vol->domainname) { | |
0b456f04 | 2311 | pr_warn("CIFS: no memory for domainname\n"); |
8830d7e0 SP |
2312 | goto cifs_parse_mount_err; |
2313 | } | |
f96637be | 2314 | cifs_dbg(FYI, "Domain name set\n"); |
8830d7e0 SP |
2315 | break; |
2316 | case Opt_srcaddr: | |
2317 | string = match_strdup(args); | |
2318 | if (string == NULL) | |
2319 | goto out_nomem; | |
2320 | ||
4fe9e963 | 2321 | if (!cifs_convert_address( |
8830d7e0 SP |
2322 | (struct sockaddr *)&vol->srcaddr, |
2323 | string, strlen(string))) { | |
0b456f04 AS |
2324 | pr_warn("CIFS: Could not parse srcaddr: %s\n", |
2325 | string); | |
8830d7e0 SP |
2326 | goto cifs_parse_mount_err; |
2327 | } | |
2328 | break; | |
8830d7e0 SP |
2329 | case Opt_iocharset: |
2330 | string = match_strdup(args); | |
2331 | if (string == NULL) | |
2332 | goto out_nomem; | |
2333 | ||
4fe9e963 | 2334 | if (strnlen(string, 1024) >= 65) { |
0b456f04 | 2335 | pr_warn("CIFS: iocharset name too long.\n"); |
8830d7e0 SP |
2336 | goto cifs_parse_mount_err; |
2337 | } | |
2338 | ||
87e747cd | 2339 | if (strncasecmp(string, "default", 7) != 0) { |
2bd50fb3 | 2340 | kfree(vol->iocharset); |
8830d7e0 SP |
2341 | vol->iocharset = kstrdup(string, |
2342 | GFP_KERNEL); | |
2343 | if (!vol->iocharset) { | |
0b456f04 | 2344 | pr_warn("CIFS: no memory for charset\n"); |
8830d7e0 SP |
2345 | goto cifs_parse_mount_err; |
2346 | } | |
2347 | } | |
2348 | /* if iocharset not set then load_nls_default | |
2349 | * is used by caller | |
2350 | */ | |
f96637be | 2351 | cifs_dbg(FYI, "iocharset set to %s\n", string); |
8830d7e0 | 2352 | break; |
8830d7e0 SP |
2353 | case Opt_netbiosname: |
2354 | string = match_strdup(args); | |
2355 | if (string == NULL) | |
2356 | goto out_nomem; | |
2357 | ||
8830d7e0 SP |
2358 | memset(vol->source_rfc1001_name, 0x20, |
2359 | RFC1001_NAME_LEN); | |
2360 | /* | |
2361 | * FIXME: are there cases in which a comma can | |
2362 | * be valid in workstation netbios name (and | |
2363 | * need special handling)? | |
2364 | */ | |
2365 | for (i = 0; i < RFC1001_NAME_LEN; i++) { | |
2366 | /* don't ucase netbiosname for user */ | |
2367 | if (string[i] == 0) | |
2368 | break; | |
2369 | vol->source_rfc1001_name[i] = string[i]; | |
2370 | } | |
2371 | /* The string has 16th byte zero still from | |
2372 | * set at top of the function | |
2373 | */ | |
2374 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
0b456f04 | 2375 | pr_warn("CIFS: netbiosname longer than 15 truncated.\n"); |
8830d7e0 SP |
2376 | break; |
2377 | case Opt_servern: | |
2378 | /* servernetbiosname specified override *SMBSERVER */ | |
2379 | string = match_strdup(args); | |
2380 | if (string == NULL) | |
2381 | goto out_nomem; | |
2382 | ||
8830d7e0 SP |
2383 | /* last byte, type, is 0x20 for servr type */ |
2384 | memset(vol->target_rfc1001_name, 0x20, | |
2385 | RFC1001_NAME_LEN_WITH_NULL); | |
2386 | ||
2387 | /* BB are there cases in which a comma can be | |
2388 | valid in this workstation netbios name | |
2389 | (and need special handling)? */ | |
2390 | ||
2391 | /* user or mount helper must uppercase the | |
2392 | netbios name */ | |
2393 | for (i = 0; i < 15; i++) { | |
2394 | if (string[i] == 0) | |
2395 | break; | |
2396 | vol->target_rfc1001_name[i] = string[i]; | |
2397 | } | |
2398 | /* The string has 16th byte zero still from | |
2399 | set at top of the function */ | |
2400 | if (i == RFC1001_NAME_LEN && string[i] != 0) | |
0b456f04 | 2401 | pr_warn("CIFS: server netbiosname longer than 15 truncated.\n"); |
8830d7e0 SP |
2402 | break; |
2403 | case Opt_ver: | |
7e682f76 | 2404 | /* version of mount userspace tools, not dialect */ |
8830d7e0 SP |
2405 | string = match_strdup(args); |
2406 | if (string == NULL) | |
2407 | goto out_nomem; | |
2408 | ||
7e682f76 | 2409 | /* If interface changes in mount.cifs bump to new ver */ |
87e747cd | 2410 | if (strncasecmp(string, "1", 1) == 0) { |
7e682f76 SF |
2411 | if (strlen(string) > 1) { |
2412 | pr_warn("Bad mount helper ver=%s. Did " | |
2413 | "you want SMB1 (CIFS) dialect " | |
2414 | "and mean to type vers=1.0 " | |
2415 | "instead?\n", string); | |
2416 | goto cifs_parse_mount_err; | |
2417 | } | |
8830d7e0 SP |
2418 | /* This is the default */ |
2419 | break; | |
2420 | } | |
2421 | /* For all other value, error */ | |
7e682f76 | 2422 | pr_warn("CIFS: Invalid mount helper version specified\n"); |
b946845a | 2423 | goto cifs_parse_mount_err; |
23db65f5 | 2424 | case Opt_vers: |
7e682f76 | 2425 | /* protocol version (dialect) */ |
23db65f5 JL |
2426 | string = match_strdup(args); |
2427 | if (string == NULL) | |
2428 | goto out_nomem; | |
2429 | ||
c7c137b9 | 2430 | if (cifs_parse_smb_version(string, vol, is_smb3) != 0) |
23db65f5 | 2431 | goto cifs_parse_mount_err; |
7e682f76 | 2432 | got_version = true; |
23db65f5 | 2433 | break; |
8830d7e0 SP |
2434 | case Opt_sec: |
2435 | string = match_strdup(args); | |
2436 | if (string == NULL) | |
2437 | goto out_nomem; | |
2438 | ||
8830d7e0 SP |
2439 | if (cifs_parse_security_flavors(string, vol) != 0) |
2440 | goto cifs_parse_mount_err; | |
2441 | break; | |
15b6a473 JL |
2442 | case Opt_cache: |
2443 | string = match_strdup(args); | |
2444 | if (string == NULL) | |
2445 | goto out_nomem; | |
2446 | ||
2447 | if (cifs_parse_cache_flavor(string, vol) != 0) | |
2448 | goto cifs_parse_mount_err; | |
2449 | break; | |
8830d7e0 | 2450 | default: |
d8162558 JL |
2451 | /* |
2452 | * An option we don't recognize. Save it off for later | |
2453 | * if we haven't already found one | |
2454 | */ | |
2455 | if (!invalid) | |
2456 | invalid = data; | |
8830d7e0 | 2457 | break; |
1da177e4 | 2458 | } |
8830d7e0 SP |
2459 | /* Free up any allocated string */ |
2460 | kfree(string); | |
2461 | string = NULL; | |
1da177e4 | 2462 | } |
0eb8a132 | 2463 | |
d8162558 | 2464 | if (!sloppy && invalid) { |
0b456f04 | 2465 | pr_err("CIFS: Unknown mount option \"%s\"\n", invalid); |
d8162558 JL |
2466 | goto cifs_parse_mount_err; |
2467 | } | |
2468 | ||
8339dd32 LL |
2469 | if (vol->rdma && vol->vals->protocol_id < SMB30_PROT_ID) { |
2470 | cifs_dbg(VFS, "SMB Direct requires Version >=3.0\n"); | |
2471 | goto cifs_parse_mount_err; | |
2472 | } | |
2473 | ||
8a8798a5 JL |
2474 | #ifndef CONFIG_KEYS |
2475 | /* Muliuser mounts require CONFIG_KEYS support */ | |
2476 | if (vol->multiuser) { | |
f96637be | 2477 | cifs_dbg(VFS, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n"); |
b946845a | 2478 | goto cifs_parse_mount_err; |
0eb8a132 | 2479 | } |
8a8798a5 | 2480 | #endif |
e5e69abd | 2481 | if (!vol->UNC) { |
37d4f99b | 2482 | cifs_dbg(VFS, "CIFS mount error: No usable UNC path provided in device string!\n"); |
e5e69abd JL |
2483 | goto cifs_parse_mount_err; |
2484 | } | |
0eb8a132 | 2485 | |
62a1a439 JL |
2486 | /* make sure UNC has a share name */ |
2487 | if (!strchr(vol->UNC + 3, '\\')) { | |
f96637be | 2488 | cifs_dbg(VFS, "Malformed UNC. Unable to find share name.\n"); |
62a1a439 JL |
2489 | goto cifs_parse_mount_err; |
2490 | } | |
2491 | ||
b979aaa1 | 2492 | if (!got_ip) { |
29bb3158 DP |
2493 | int len; |
2494 | const char *slash; | |
2495 | ||
b979aaa1 | 2496 | /* No ip= option specified? Try to get it from UNC */ |
29bb3158 DP |
2497 | /* Use the address part of the UNC. */ |
2498 | slash = strchr(&vol->UNC[2], '\\'); | |
2499 | len = slash - &vol->UNC[2]; | |
2500 | if (!cifs_convert_address(dstaddr, &vol->UNC[2], len)) { | |
0b456f04 | 2501 | pr_err("Unable to determine destination address.\n"); |
b979aaa1 JL |
2502 | goto cifs_parse_mount_err; |
2503 | } | |
2504 | } | |
2505 | ||
2506 | /* set the port that we got earlier */ | |
2507 | cifs_set_port(dstaddr, port); | |
1da177e4 | 2508 | |
9b9d6b24 JL |
2509 | if (uid_specified) |
2510 | vol->override_uid = override_uid; | |
2511 | else if (override_uid == 1) | |
0b456f04 | 2512 | pr_notice("CIFS: ignoring forceuid mount option specified with no uid= option.\n"); |
9b9d6b24 JL |
2513 | |
2514 | if (gid_specified) | |
2515 | vol->override_gid = override_gid; | |
2516 | else if (override_gid == 1) | |
0b456f04 | 2517 | pr_notice("CIFS: ignoring forcegid mount option specified with no gid= option.\n"); |
9b9d6b24 | 2518 | |
7e682f76 SF |
2519 | if (got_version == false) |
2520 | pr_warn("No dialect specified on mount. Default has changed to " | |
9764c02f | 2521 | "a more secure dialect, SMB2.1 or later (e.g. SMB3), from CIFS " |
7e682f76 | 2522 | "(SMB1). To use the less secure SMB1 dialect to access " |
9764c02f SF |
2523 | "old servers which do not support SMB3 (or SMB2.1) specify vers=1.0" |
2524 | " on mount.\n"); | |
7e682f76 | 2525 | |
b946845a | 2526 | kfree(mountdata_copy); |
1da177e4 | 2527 | return 0; |
b946845a | 2528 | |
8830d7e0 | 2529 | out_nomem: |
0b456f04 | 2530 | pr_warn("Could not allocate temporary buffer\n"); |
b946845a | 2531 | cifs_parse_mount_err: |
8830d7e0 | 2532 | kfree(string); |
b946845a SF |
2533 | kfree(mountdata_copy); |
2534 | return 1; | |
1da177e4 LT |
2535 | } |
2536 | ||
3eb9a889 BG |
2537 | /** Returns true if srcaddr isn't specified and rhs isn't |
2538 | * specified, or if srcaddr is specified and | |
2539 | * matches the IP address of the rhs argument. | |
2540 | */ | |
2541 | static bool | |
2542 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) | |
2543 | { | |
2544 | switch (srcaddr->sa_family) { | |
2545 | case AF_UNSPEC: | |
2546 | return (rhs->sa_family == AF_UNSPEC); | |
2547 | case AF_INET: { | |
2548 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; | |
2549 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; | |
2550 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); | |
2551 | } | |
2552 | case AF_INET6: { | |
2553 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; | |
e3e2775c | 2554 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs; |
3eb9a889 BG |
2555 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); |
2556 | } | |
2557 | default: | |
2558 | WARN_ON(1); | |
2559 | return false; /* don't expect to be here */ | |
2560 | } | |
2561 | } | |
2562 | ||
4b886136 PS |
2563 | /* |
2564 | * If no port is specified in addr structure, we try to match with 445 port | |
2565 | * and if it fails - with 139 ports. It should be called only if address | |
2566 | * families of server and addr are equal. | |
2567 | */ | |
2568 | static bool | |
2569 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) | |
2570 | { | |
6da97910 | 2571 | __be16 port, *sport; |
4b886136 | 2572 | |
3b249115 LL |
2573 | /* SMBDirect manages its own ports, don't match it here */ |
2574 | if (server->rdma) | |
2575 | return true; | |
2576 | ||
4b886136 PS |
2577 | switch (addr->sa_family) { |
2578 | case AF_INET: | |
2579 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; | |
2580 | port = ((struct sockaddr_in *) addr)->sin_port; | |
2581 | break; | |
2582 | case AF_INET6: | |
2583 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; | |
2584 | port = ((struct sockaddr_in6 *) addr)->sin6_port; | |
2585 | break; | |
2586 | default: | |
2587 | WARN_ON(1); | |
2588 | return false; | |
2589 | } | |
2590 | ||
2591 | if (!port) { | |
2592 | port = htons(CIFS_PORT); | |
2593 | if (port == *sport) | |
2594 | return true; | |
2595 | ||
2596 | port = htons(RFC1001_PORT); | |
2597 | } | |
2598 | ||
2599 | return port == *sport; | |
2600 | } | |
3eb9a889 | 2601 | |
4515148e | 2602 | static bool |
3eb9a889 BG |
2603 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
2604 | struct sockaddr *srcaddr) | |
4515148e | 2605 | { |
4515148e | 2606 | switch (addr->sa_family) { |
a9f1b85e PS |
2607 | case AF_INET: { |
2608 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
2609 | struct sockaddr_in *srv_addr4 = | |
2610 | (struct sockaddr_in *)&server->dstaddr; | |
2611 | ||
2612 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) | |
4515148e | 2613 | return false; |
4515148e | 2614 | break; |
a9f1b85e PS |
2615 | } |
2616 | case AF_INET6: { | |
2617 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
2618 | struct sockaddr_in6 *srv_addr6 = | |
2619 | (struct sockaddr_in6 *)&server->dstaddr; | |
2620 | ||
4515148e | 2621 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
a9f1b85e | 2622 | &srv_addr6->sin6_addr)) |
4515148e | 2623 | return false; |
a9f1b85e | 2624 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
4515148e | 2625 | return false; |
4515148e JL |
2626 | break; |
2627 | } | |
a9f1b85e PS |
2628 | default: |
2629 | WARN_ON(1); | |
2630 | return false; /* don't expect to be here */ | |
2631 | } | |
4515148e | 2632 | |
3eb9a889 BG |
2633 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
2634 | return false; | |
2635 | ||
4515148e JL |
2636 | return true; |
2637 | } | |
2638 | ||
daf5b0b6 JL |
2639 | static bool |
2640 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
2641 | { | |
3f618223 JL |
2642 | /* |
2643 | * The select_sectype function should either return the vol->sectype | |
2644 | * that was specified, or "Unspecified" if that sectype was not | |
2645 | * compatible with the given NEGOTIATE request. | |
2646 | */ | |
ef65aaed SP |
2647 | if (server->ops->select_sectype(server, vol->sectype) |
2648 | == Unspecified) | |
daf5b0b6 | 2649 | return false; |
daf5b0b6 | 2650 | |
3f618223 JL |
2651 | /* |
2652 | * Now check if signing mode is acceptable. No need to check | |
2653 | * global_secflags at this point since if MUST_SIGN is set then | |
2654 | * the server->sign had better be too. | |
2655 | */ | |
38d77c50 JL |
2656 | if (vol->sign && !server->sign) |
2657 | return false; | |
daf5b0b6 JL |
2658 | |
2659 | return true; | |
2660 | } | |
2661 | ||
9fa114f7 | 2662 | static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol) |
37bb04e5 | 2663 | { |
9fa114f7 JL |
2664 | struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr; |
2665 | ||
a0b3df5c JL |
2666 | if (vol->nosharesock) |
2667 | return 0; | |
2668 | ||
43cdae88 SF |
2669 | /* If multidialect negotiation see if existing sessions match one */ |
2670 | if (strcmp(vol->vals->version_string, SMB3ANY_VERSION_STRING) == 0) { | |
2671 | if (server->vals->protocol_id < SMB30_PROT_ID) | |
2672 | return 0; | |
2673 | } else if (strcmp(vol->vals->version_string, | |
2674 | SMBDEFAULT_VERSION_STRING) == 0) { | |
2675 | if (server->vals->protocol_id < SMB21_PROT_ID) | |
2676 | return 0; | |
2677 | } else if ((server->vals != vol->vals) || (server->ops != vol->ops)) | |
23db65f5 JL |
2678 | return 0; |
2679 | ||
37bb04e5 PS |
2680 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) |
2681 | return 0; | |
2682 | ||
2683 | if (!match_address(server, addr, | |
2684 | (struct sockaddr *)&vol->srcaddr)) | |
2685 | return 0; | |
2686 | ||
2687 | if (!match_port(server, addr)) | |
2688 | return 0; | |
2689 | ||
2690 | if (!match_security(server, vol)) | |
2691 | return 0; | |
2692 | ||
b782fcc1 | 2693 | if (server->echo_interval != vol->echo_interval * HZ) |
adfeb3e0 SF |
2694 | return 0; |
2695 | ||
8339dd32 LL |
2696 | if (server->rdma != vol->rdma) |
2697 | return 0; | |
2698 | ||
4f5c10f1 SF |
2699 | if (server->ignore_signature != vol->ignore_signature) |
2700 | return 0; | |
2701 | ||
563317ec SF |
2702 | if (server->min_offload != vol->min_offload) |
2703 | return 0; | |
2704 | ||
37bb04e5 PS |
2705 | return 1; |
2706 | } | |
2707 | ||
54be1f6c | 2708 | struct TCP_Server_Info * |
9fa114f7 | 2709 | cifs_find_tcp_session(struct smb_vol *vol) |
1da177e4 | 2710 | { |
e7ddee90 | 2711 | struct TCP_Server_Info *server; |
e7ddee90 | 2712 | |
3f9bcca7 | 2713 | spin_lock(&cifs_tcp_ses_lock); |
4515148e | 2714 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
3345bb44 PAS |
2715 | /* |
2716 | * Skip ses channels since they're only handled in lower layers | |
2717 | * (e.g. cifs_send_recv). | |
2718 | */ | |
2719 | if (server->is_channel || !match_server(server, vol)) | |
daf5b0b6 JL |
2720 | continue; |
2721 | ||
e7ddee90 | 2722 | ++server->srv_count; |
3f9bcca7 | 2723 | spin_unlock(&cifs_tcp_ses_lock); |
f96637be | 2724 | cifs_dbg(FYI, "Existing tcp session with server found\n"); |
e7ddee90 | 2725 | return server; |
1da177e4 | 2726 | } |
3f9bcca7 | 2727 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
2728 | return NULL; |
2729 | } | |
1b20d672 | 2730 | |
53e0e11e PS |
2731 | void |
2732 | cifs_put_tcp_session(struct TCP_Server_Info *server, int from_reconnect) | |
1da177e4 | 2733 | { |
a5c3e1c7 SF |
2734 | struct task_struct *task; |
2735 | ||
3f9bcca7 | 2736 | spin_lock(&cifs_tcp_ses_lock); |
e7ddee90 | 2737 | if (--server->srv_count > 0) { |
3f9bcca7 | 2738 | spin_unlock(&cifs_tcp_ses_lock); |
e7ddee90 | 2739 | return; |
1da177e4 | 2740 | } |
1b20d672 | 2741 | |
f1d0c998 RL |
2742 | put_net(cifs_net_ns(server)); |
2743 | ||
e7ddee90 | 2744 | list_del_init(&server->tcp_ses_list); |
3f9bcca7 | 2745 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 2746 | |
c74093b6 JL |
2747 | cancel_delayed_work_sync(&server->echo); |
2748 | ||
53e0e11e PS |
2749 | if (from_reconnect) |
2750 | /* | |
2751 | * Avoid deadlock here: reconnect work calls | |
2752 | * cifs_put_tcp_session() at its end. Need to be sure | |
2753 | * that reconnect work does nothing with server pointer after | |
2754 | * that step. | |
2755 | */ | |
2756 | cancel_delayed_work(&server->reconnect); | |
2757 | else | |
2758 | cancel_delayed_work_sync(&server->reconnect); | |
53e0e11e | 2759 | |
e7ddee90 JL |
2760 | spin_lock(&GlobalMid_Lock); |
2761 | server->tcpStatus = CifsExiting; | |
2762 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 2763 | |
026e93dc | 2764 | cifs_crypto_secmech_release(server); |
488f1d2d SJ |
2765 | cifs_fscache_release_client_cookie(server); |
2766 | ||
21e73393 SP |
2767 | kfree(server->session_key.response); |
2768 | server->session_key.response = NULL; | |
2769 | server->session_key.len = 0; | |
a5c3e1c7 SF |
2770 | |
2771 | task = xchg(&server->tsk, NULL); | |
2772 | if (task) | |
72abe3bc | 2773 | send_sig(SIGKILL, task, 1); |
1da177e4 LT |
2774 | } |
2775 | ||
d70e9fa5 | 2776 | struct TCP_Server_Info * |
63c038c2 JL |
2777 | cifs_get_tcp_session(struct smb_vol *volume_info) |
2778 | { | |
2779 | struct TCP_Server_Info *tcp_ses = NULL; | |
63c038c2 JL |
2780 | int rc; |
2781 | ||
f96637be | 2782 | cifs_dbg(FYI, "UNC: %s\n", volume_info->UNC); |
63c038c2 JL |
2783 | |
2784 | /* see if we already have a matching tcp_ses */ | |
9fa114f7 | 2785 | tcp_ses = cifs_find_tcp_session(volume_info); |
63c038c2 JL |
2786 | if (tcp_ses) |
2787 | return tcp_ses; | |
2788 | ||
2789 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
2790 | if (!tcp_ses) { | |
2791 | rc = -ENOMEM; | |
2792 | goto out_err; | |
2793 | } | |
2794 | ||
23db65f5 JL |
2795 | tcp_ses->ops = volume_info->ops; |
2796 | tcp_ses->vals = volume_info->vals; | |
f1d0c998 | 2797 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
63c038c2 JL |
2798 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
2799 | if (IS_ERR(tcp_ses->hostname)) { | |
2800 | rc = PTR_ERR(tcp_ses->hostname); | |
f7c5445a | 2801 | goto out_err_crypto_release; |
63c038c2 JL |
2802 | } |
2803 | ||
8eecd1c2 PAS |
2804 | tcp_ses->noblockcnt = volume_info->rootfs; |
2805 | tcp_ses->noblocksnd = volume_info->noblocksnd || volume_info->rootfs; | |
63c038c2 | 2806 | tcp_ses->noautotune = volume_info->noautotune; |
6a5fa236 | 2807 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
8339dd32 | 2808 | tcp_ses->rdma = volume_info->rdma; |
fc40f9cf | 2809 | tcp_ses->in_flight = 0; |
1b63f184 | 2810 | tcp_ses->max_in_flight = 0; |
2d86dbc9 | 2811 | tcp_ses->credits = 1; |
63c038c2 JL |
2812 | init_waitqueue_head(&tcp_ses->response_q); |
2813 | init_waitqueue_head(&tcp_ses->request_q); | |
2814 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
2815 | mutex_init(&tcp_ses->srv_mutex); | |
2816 | memcpy(tcp_ses->workstation_RFC1001_name, | |
2817 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
2818 | memcpy(tcp_ses->server_RFC1001_name, | |
2819 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
5d0d2882 | 2820 | tcp_ses->session_estab = false; |
63c038c2 | 2821 | tcp_ses->sequence_number = 0; |
5b964852 | 2822 | tcp_ses->reconnect_instance = 1; |
fda35943 | 2823 | tcp_ses->lstrp = jiffies; |
9fe5ff1c | 2824 | tcp_ses->compress_algorithm = cpu_to_le16(volume_info->compression); |
58fa015f | 2825 | spin_lock_init(&tcp_ses->req_lock); |
63c038c2 JL |
2826 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
2827 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
c74093b6 | 2828 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
53e0e11e PS |
2829 | INIT_DELAYED_WORK(&tcp_ses->reconnect, smb2_reconnect_server); |
2830 | mutex_init(&tcp_ses->reconnect_mutex); | |
9fa114f7 JL |
2831 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
2832 | sizeof(tcp_ses->srcaddr)); | |
2833 | memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr, | |
2834 | sizeof(tcp_ses->dstaddr)); | |
bcc88801 AA |
2835 | if (volume_info->use_client_guid) |
2836 | memcpy(tcp_ses->client_guid, volume_info->client_guid, | |
2837 | SMB2_CLIENT_GUID_SIZE); | |
2838 | else | |
2839 | generate_random_uuid(tcp_ses->client_guid); | |
63c038c2 JL |
2840 | /* |
2841 | * at this point we are the only ones with the pointer | |
2842 | * to the struct since the kernel thread not created yet | |
2843 | * no need to spinlock this init of tcpStatus or srv_count | |
2844 | */ | |
2845 | tcp_ses->tcpStatus = CifsNew; | |
2846 | ++tcp_ses->srv_count; | |
2847 | ||
adfeb3e0 SF |
2848 | if (volume_info->echo_interval >= SMB_ECHO_INTERVAL_MIN && |
2849 | volume_info->echo_interval <= SMB_ECHO_INTERVAL_MAX) | |
2850 | tcp_ses->echo_interval = volume_info->echo_interval * HZ; | |
2851 | else | |
2852 | tcp_ses->echo_interval = SMB_ECHO_INTERVAL_DEFAULT * HZ; | |
2f894646 LL |
2853 | if (tcp_ses->rdma) { |
2854 | #ifndef CONFIG_CIFS_SMB_DIRECT | |
2855 | cifs_dbg(VFS, "CONFIG_CIFS_SMB_DIRECT is not enabled\n"); | |
2856 | rc = -ENOENT; | |
2857 | goto out_err_crypto_release; | |
2858 | #endif | |
2859 | tcp_ses->smbd_conn = smbd_get_connection( | |
2860 | tcp_ses, (struct sockaddr *)&volume_info->dstaddr); | |
2861 | if (tcp_ses->smbd_conn) { | |
2862 | cifs_dbg(VFS, "RDMA transport established\n"); | |
2863 | rc = 0; | |
2864 | goto smbd_connected; | |
2865 | } else { | |
2866 | rc = -ENOENT; | |
2867 | goto out_err_crypto_release; | |
2868 | } | |
2869 | } | |
a9f1b85e | 2870 | rc = ip_connect(tcp_ses); |
63c038c2 | 2871 | if (rc < 0) { |
f96637be | 2872 | cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n"); |
f7c5445a | 2873 | goto out_err_crypto_release; |
63c038c2 | 2874 | } |
2f894646 | 2875 | smbd_connected: |
63c038c2 JL |
2876 | /* |
2877 | * since we're in a cifs function already, we know that | |
2878 | * this will succeed. No need for try_module_get(). | |
2879 | */ | |
2880 | __module_get(THIS_MODULE); | |
7c97c200 | 2881 | tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, |
63c038c2 JL |
2882 | tcp_ses, "cifsd"); |
2883 | if (IS_ERR(tcp_ses->tsk)) { | |
2884 | rc = PTR_ERR(tcp_ses->tsk); | |
f96637be | 2885 | cifs_dbg(VFS, "error %d create cifsd thread\n", rc); |
63c038c2 | 2886 | module_put(THIS_MODULE); |
f7c5445a | 2887 | goto out_err_crypto_release; |
63c038c2 | 2888 | } |
563317ec | 2889 | tcp_ses->min_offload = volume_info->min_offload; |
fd88ce93 | 2890 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
63c038c2 | 2891 | |
93d5cb51 | 2892 | tcp_ses->nr_targets = 1; |
4f5c10f1 | 2893 | tcp_ses->ignore_signature = volume_info->ignore_signature; |
63c038c2 | 2894 | /* thread spawned, put it on the list */ |
3f9bcca7 | 2895 | spin_lock(&cifs_tcp_ses_lock); |
63c038c2 | 2896 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
3f9bcca7 | 2897 | spin_unlock(&cifs_tcp_ses_lock); |
63c038c2 | 2898 | |
488f1d2d SJ |
2899 | cifs_fscache_get_client_cookie(tcp_ses); |
2900 | ||
c74093b6 | 2901 | /* queue echo request delayed work */ |
adfeb3e0 | 2902 | queue_delayed_work(cifsiod_wq, &tcp_ses->echo, tcp_ses->echo_interval); |
c74093b6 | 2903 | |
63c038c2 JL |
2904 | return tcp_ses; |
2905 | ||
f7c5445a | 2906 | out_err_crypto_release: |
026e93dc | 2907 | cifs_crypto_secmech_release(tcp_ses); |
d2b91521 | 2908 | |
f1d0c998 RL |
2909 | put_net(cifs_net_ns(tcp_ses)); |
2910 | ||
63c038c2 JL |
2911 | out_err: |
2912 | if (tcp_ses) { | |
8347a5cd SF |
2913 | if (!IS_ERR(tcp_ses->hostname)) |
2914 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
2915 | if (tcp_ses->ssocket) |
2916 | sock_release(tcp_ses->ssocket); | |
2917 | kfree(tcp_ses); | |
2918 | } | |
2919 | return ERR_PTR(rc); | |
2920 | } | |
2921 | ||
96daf2b0 | 2922 | static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
37bb04e5 | 2923 | { |
3f618223 JL |
2924 | if (vol->sectype != Unspecified && |
2925 | vol->sectype != ses->sectype) | |
2926 | return 0; | |
2927 | ||
bcc88801 AA |
2928 | /* |
2929 | * If an existing session is limited to less channels than | |
2930 | * requested, it should not be reused | |
2931 | */ | |
2932 | if (ses->chan_max < vol->max_channels) | |
2933 | return 0; | |
2934 | ||
3f618223 | 2935 | switch (ses->sectype) { |
37bb04e5 | 2936 | case Kerberos: |
64ed39dd | 2937 | if (!uid_eq(vol->cred_uid, ses->cred_uid)) |
37bb04e5 PS |
2938 | return 0; |
2939 | break; | |
2940 | default: | |
04febabc JL |
2941 | /* NULL username means anonymous session */ |
2942 | if (ses->user_name == NULL) { | |
2943 | if (!vol->nullauth) | |
2944 | return 0; | |
2945 | break; | |
2946 | } | |
2947 | ||
37bb04e5 | 2948 | /* anything else takes username/password */ |
04febabc JL |
2949 | if (strncmp(ses->user_name, |
2950 | vol->username ? vol->username : "", | |
8c3a2b4c | 2951 | CIFS_MAX_USERNAME_LEN)) |
37bb04e5 | 2952 | return 0; |
08b37d51 | 2953 | if ((vol->username && strlen(vol->username) != 0) && |
37bb04e5 PS |
2954 | ses->password != NULL && |
2955 | strncmp(ses->password, | |
2956 | vol->password ? vol->password : "", | |
8c3a2b4c | 2957 | CIFS_MAX_PASSWORD_LEN)) |
37bb04e5 PS |
2958 | return 0; |
2959 | } | |
2960 | return 1; | |
2961 | } | |
2962 | ||
b327a717 AA |
2963 | /** |
2964 | * cifs_setup_ipc - helper to setup the IPC tcon for the session | |
2965 | * | |
2966 | * A new IPC connection is made and stored in the session | |
2967 | * tcon_ipc. The IPC tcon has the same lifetime as the session. | |
2968 | */ | |
2969 | static int | |
2970 | cifs_setup_ipc(struct cifs_ses *ses, struct smb_vol *volume_info) | |
2971 | { | |
2972 | int rc = 0, xid; | |
2973 | struct cifs_tcon *tcon; | |
2974 | struct nls_table *nls_codepage; | |
2975 | char unc[SERVER_NAME_LENGTH + sizeof("//x/IPC$")] = {0}; | |
2976 | bool seal = false; | |
afe6f653 | 2977 | struct TCP_Server_Info *server = ses->server; |
b327a717 AA |
2978 | |
2979 | /* | |
2980 | * If the mount request that resulted in the creation of the | |
2981 | * session requires encryption, force IPC to be encrypted too. | |
2982 | */ | |
2983 | if (volume_info->seal) { | |
afe6f653 | 2984 | if (server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) |
b327a717 AA |
2985 | seal = true; |
2986 | else { | |
afe6f653 | 2987 | cifs_server_dbg(VFS, |
b327a717 AA |
2988 | "IPC: server doesn't support encryption\n"); |
2989 | return -EOPNOTSUPP; | |
2990 | } | |
2991 | } | |
2992 | ||
2993 | tcon = tconInfoAlloc(); | |
2994 | if (tcon == NULL) | |
2995 | return -ENOMEM; | |
2996 | ||
afe6f653 | 2997 | scnprintf(unc, sizeof(unc), "\\\\%s\\IPC$", server->hostname); |
b327a717 AA |
2998 | |
2999 | /* cannot fail */ | |
3000 | nls_codepage = load_nls_default(); | |
3001 | ||
3002 | xid = get_xid(); | |
3003 | tcon->ses = ses; | |
3004 | tcon->ipc = true; | |
3005 | tcon->seal = seal; | |
afe6f653 | 3006 | rc = server->ops->tree_connect(xid, ses, unc, tcon, nls_codepage); |
b327a717 AA |
3007 | free_xid(xid); |
3008 | ||
3009 | if (rc) { | |
afe6f653 | 3010 | cifs_server_dbg(VFS, "failed to connect to IPC (rc=%d)\n", rc); |
b327a717 AA |
3011 | tconInfoFree(tcon); |
3012 | goto out; | |
3013 | } | |
3014 | ||
3015 | cifs_dbg(FYI, "IPC tcon rc = %d ipc tid = %d\n", rc, tcon->tid); | |
3016 | ||
3017 | ses->tcon_ipc = tcon; | |
3018 | out: | |
3019 | unload_nls(nls_codepage); | |
3020 | return rc; | |
3021 | } | |
3022 | ||
3023 | /** | |
3024 | * cifs_free_ipc - helper to release the session IPC tcon | |
3025 | * | |
3026 | * Needs to be called everytime a session is destroyed | |
3027 | */ | |
3028 | static int | |
3029 | cifs_free_ipc(struct cifs_ses *ses) | |
3030 | { | |
3031 | int rc = 0, xid; | |
3032 | struct cifs_tcon *tcon = ses->tcon_ipc; | |
3033 | ||
3034 | if (tcon == NULL) | |
3035 | return 0; | |
3036 | ||
3037 | if (ses->server->ops->tree_disconnect) { | |
3038 | xid = get_xid(); | |
3039 | rc = ses->server->ops->tree_disconnect(xid, tcon); | |
3040 | free_xid(xid); | |
3041 | } | |
3042 | ||
3043 | if (rc) | |
3044 | cifs_dbg(FYI, "failed to disconnect IPC tcon (rc=%d)\n", rc); | |
3045 | ||
3046 | tconInfoFree(tcon); | |
3047 | ses->tcon_ipc = NULL; | |
3048 | return rc; | |
3049 | } | |
3050 | ||
96daf2b0 | 3051 | static struct cifs_ses * |
4ff67b72 | 3052 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 3053 | { |
96daf2b0 | 3054 | struct cifs_ses *ses; |
dea570e0 | 3055 | |
3f9bcca7 | 3056 | spin_lock(&cifs_tcp_ses_lock); |
4ff67b72 | 3057 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
7f48558e SP |
3058 | if (ses->status == CifsExiting) |
3059 | continue; | |
37bb04e5 PS |
3060 | if (!match_session(ses, vol)) |
3061 | continue; | |
14fbf50d | 3062 | ++ses->ses_count; |
3f9bcca7 | 3063 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
3064 | return ses; |
3065 | } | |
3f9bcca7 | 3066 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
3067 | return NULL; |
3068 | } | |
dea570e0 | 3069 | |
5072010c | 3070 | void cifs_put_smb_ses(struct cifs_ses *ses) |
14fbf50d | 3071 | { |
7f48558e | 3072 | unsigned int rc, xid; |
14fbf50d | 3073 | struct TCP_Server_Info *server = ses->server; |
dea570e0 | 3074 | |
f96637be | 3075 | cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count); |
7f48558e | 3076 | |
3f9bcca7 | 3077 | spin_lock(&cifs_tcp_ses_lock); |
7f48558e SP |
3078 | if (ses->status == CifsExiting) { |
3079 | spin_unlock(&cifs_tcp_ses_lock); | |
3080 | return; | |
3081 | } | |
14fbf50d | 3082 | if (--ses->ses_count > 0) { |
3f9bcca7 | 3083 | spin_unlock(&cifs_tcp_ses_lock); |
14fbf50d JL |
3084 | return; |
3085 | } | |
7f48558e SP |
3086 | if (ses->status == CifsGood) |
3087 | ses->status = CifsExiting; | |
3f9bcca7 | 3088 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 3089 | |
b327a717 AA |
3090 | cifs_free_ipc(ses); |
3091 | ||
7f48558e | 3092 | if (ses->status == CifsExiting && server->ops->logoff) { |
6d5786a3 | 3093 | xid = get_xid(); |
7f48558e SP |
3094 | rc = server->ops->logoff(xid, ses); |
3095 | if (rc) | |
afe6f653 | 3096 | cifs_server_dbg(VFS, "%s: Session Logoff failure rc=%d\n", |
7f48558e | 3097 | __func__, rc); |
6d5786a3 | 3098 | _free_xid(xid); |
14fbf50d | 3099 | } |
7f48558e SP |
3100 | |
3101 | spin_lock(&cifs_tcp_ses_lock); | |
3102 | list_del_init(&ses->smb_ses_list); | |
3103 | spin_unlock(&cifs_tcp_ses_lock); | |
3104 | ||
d70e9fa5 AA |
3105 | /* close any extra channels */ |
3106 | if (ses->chan_count > 1) { | |
3107 | int i; | |
3108 | ||
3109 | for (i = 1; i < ses->chan_count; i++) | |
3110 | cifs_put_tcp_session(ses->chans[i].server, 0); | |
3111 | } | |
3112 | ||
14fbf50d | 3113 | sesInfoFree(ses); |
53e0e11e | 3114 | cifs_put_tcp_session(server, 0); |
14fbf50d | 3115 | } |
dea570e0 | 3116 | |
8a8798a5 JL |
3117 | #ifdef CONFIG_KEYS |
3118 | ||
057d6332 CG |
3119 | /* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */ |
3120 | #define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1) | |
8a8798a5 JL |
3121 | |
3122 | /* Populate username and pw fields from keyring if possible */ | |
3123 | static int | |
3124 | cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) | |
3125 | { | |
3126 | int rc = 0; | |
f2aee329 | 3127 | int is_domain = 0; |
146aa8b1 DH |
3128 | const char *delim, *payload; |
3129 | char *desc; | |
8a8798a5 JL |
3130 | ssize_t len; |
3131 | struct key *key; | |
3132 | struct TCP_Server_Info *server = ses->server; | |
3133 | struct sockaddr_in *sa; | |
3134 | struct sockaddr_in6 *sa6; | |
146aa8b1 | 3135 | const struct user_key_payload *upayload; |
8a8798a5 JL |
3136 | |
3137 | desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL); | |
3138 | if (!desc) | |
3139 | return -ENOMEM; | |
3140 | ||
3141 | /* try to find an address key first */ | |
3142 | switch (server->dstaddr.ss_family) { | |
3143 | case AF_INET: | |
3144 | sa = (struct sockaddr_in *)&server->dstaddr; | |
3145 | sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr); | |
3146 | break; | |
3147 | case AF_INET6: | |
3148 | sa6 = (struct sockaddr_in6 *)&server->dstaddr; | |
3149 | sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr); | |
3150 | break; | |
3151 | default: | |
f96637be JP |
3152 | cifs_dbg(FYI, "Bad ss_family (%hu)\n", |
3153 | server->dstaddr.ss_family); | |
8a8798a5 JL |
3154 | rc = -EINVAL; |
3155 | goto out_err; | |
3156 | } | |
3157 | ||
f96637be | 3158 | cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
028db3e2 | 3159 | key = request_key(&key_type_logon, desc, ""); |
8a8798a5 JL |
3160 | if (IS_ERR(key)) { |
3161 | if (!ses->domainName) { | |
f96637be | 3162 | cifs_dbg(FYI, "domainName is NULL\n"); |
8a8798a5 JL |
3163 | rc = PTR_ERR(key); |
3164 | goto out_err; | |
3165 | } | |
3166 | ||
3167 | /* didn't work, try to find a domain key */ | |
3168 | sprintf(desc, "cifs:d:%s", ses->domainName); | |
f96637be | 3169 | cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
028db3e2 | 3170 | key = request_key(&key_type_logon, desc, ""); |
8a8798a5 JL |
3171 | if (IS_ERR(key)) { |
3172 | rc = PTR_ERR(key); | |
3173 | goto out_err; | |
3174 | } | |
f2aee329 | 3175 | is_domain = 1; |
8a8798a5 JL |
3176 | } |
3177 | ||
3178 | down_read(&key->sem); | |
0837e49a | 3179 | upayload = user_key_payload_locked(key); |
8a8798a5 | 3180 | if (IS_ERR_OR_NULL(upayload)) { |
4edc53c1 | 3181 | rc = upayload ? PTR_ERR(upayload) : -EINVAL; |
8a8798a5 JL |
3182 | goto out_key_put; |
3183 | } | |
3184 | ||
3185 | /* find first : in payload */ | |
146aa8b1 | 3186 | payload = upayload->data; |
8a8798a5 | 3187 | delim = strnchr(payload, upayload->datalen, ':'); |
f96637be | 3188 | cifs_dbg(FYI, "payload=%s\n", payload); |
8a8798a5 | 3189 | if (!delim) { |
f96637be JP |
3190 | cifs_dbg(FYI, "Unable to find ':' in payload (datalen=%d)\n", |
3191 | upayload->datalen); | |
8a8798a5 JL |
3192 | rc = -EINVAL; |
3193 | goto out_key_put; | |
3194 | } | |
3195 | ||
3196 | len = delim - payload; | |
8c3a2b4c | 3197 | if (len > CIFS_MAX_USERNAME_LEN || len <= 0) { |
f96637be JP |
3198 | cifs_dbg(FYI, "Bad value from username search (len=%zd)\n", |
3199 | len); | |
8a8798a5 JL |
3200 | rc = -EINVAL; |
3201 | goto out_key_put; | |
3202 | } | |
3203 | ||
3204 | vol->username = kstrndup(payload, len, GFP_KERNEL); | |
3205 | if (!vol->username) { | |
f96637be JP |
3206 | cifs_dbg(FYI, "Unable to allocate %zd bytes for username\n", |
3207 | len); | |
8a8798a5 JL |
3208 | rc = -ENOMEM; |
3209 | goto out_key_put; | |
3210 | } | |
f96637be | 3211 | cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username); |
8a8798a5 JL |
3212 | |
3213 | len = key->datalen - (len + 1); | |
8c3a2b4c | 3214 | if (len > CIFS_MAX_PASSWORD_LEN || len <= 0) { |
f96637be | 3215 | cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len); |
8a8798a5 JL |
3216 | rc = -EINVAL; |
3217 | kfree(vol->username); | |
3218 | vol->username = NULL; | |
3219 | goto out_key_put; | |
3220 | } | |
3221 | ||
3222 | ++delim; | |
3223 | vol->password = kstrndup(delim, len, GFP_KERNEL); | |
3224 | if (!vol->password) { | |
f96637be JP |
3225 | cifs_dbg(FYI, "Unable to allocate %zd bytes for password\n", |
3226 | len); | |
8a8798a5 JL |
3227 | rc = -ENOMEM; |
3228 | kfree(vol->username); | |
3229 | vol->username = NULL; | |
3230 | goto out_key_put; | |
3231 | } | |
3232 | ||
f2aee329 RS |
3233 | /* |
3234 | * If we have a domain key then we must set the domainName in the | |
3235 | * for the request. | |
3236 | */ | |
3237 | if (is_domain && ses->domainName) { | |
3238 | vol->domainname = kstrndup(ses->domainName, | |
3239 | strlen(ses->domainName), | |
3240 | GFP_KERNEL); | |
3241 | if (!vol->domainname) { | |
3242 | cifs_dbg(FYI, "Unable to allocate %zd bytes for " | |
3243 | "domain\n", len); | |
3244 | rc = -ENOMEM; | |
3245 | kfree(vol->username); | |
3246 | vol->username = NULL; | |
478228e5 | 3247 | kzfree(vol->password); |
f2aee329 RS |
3248 | vol->password = NULL; |
3249 | goto out_key_put; | |
3250 | } | |
3251 | } | |
3252 | ||
8a8798a5 JL |
3253 | out_key_put: |
3254 | up_read(&key->sem); | |
3255 | key_put(key); | |
3256 | out_err: | |
3257 | kfree(desc); | |
f96637be | 3258 | cifs_dbg(FYI, "%s: returning %d\n", __func__, rc); |
8a8798a5 JL |
3259 | return rc; |
3260 | } | |
3261 | #else /* ! CONFIG_KEYS */ | |
3262 | static inline int | |
3263 | cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), | |
3264 | struct cifs_ses *ses __attribute__((unused))) | |
3265 | { | |
3266 | return -ENOSYS; | |
3267 | } | |
3268 | #endif /* CONFIG_KEYS */ | |
3269 | ||
4a1360d0 AA |
3270 | /** |
3271 | * cifs_get_smb_ses - get a session matching @volume_info data from @server | |
3272 | * | |
3273 | * This function assumes it is being called from cifs_mount() where we | |
3274 | * already got a server reference (server refcount +1). See | |
3275 | * cifs_get_tcon() for refcount explanations. | |
3276 | */ | |
5072010c | 3277 | struct cifs_ses * |
36988c76 JL |
3278 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
3279 | { | |
286170aa PS |
3280 | int rc = -ENOMEM; |
3281 | unsigned int xid; | |
96daf2b0 | 3282 | struct cifs_ses *ses; |
a9f1b85e PS |
3283 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
3284 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36988c76 | 3285 | |
6d5786a3 | 3286 | xid = get_xid(); |
36988c76 | 3287 | |
4ff67b72 | 3288 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 | 3289 | if (ses) { |
f96637be JP |
3290 | cifs_dbg(FYI, "Existing smb sess found (status=%d)\n", |
3291 | ses->status); | |
36988c76 | 3292 | |
36988c76 | 3293 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
3294 | rc = cifs_negotiate_protocol(xid, ses); |
3295 | if (rc) { | |
3296 | mutex_unlock(&ses->session_mutex); | |
3297 | /* problem -- put our ses reference */ | |
3298 | cifs_put_smb_ses(ses); | |
6d5786a3 | 3299 | free_xid(xid); |
198b5682 JL |
3300 | return ERR_PTR(rc); |
3301 | } | |
36988c76 | 3302 | if (ses->need_reconnect) { |
f96637be | 3303 | cifs_dbg(FYI, "Session needs reconnect\n"); |
36988c76 JL |
3304 | rc = cifs_setup_session(xid, ses, |
3305 | volume_info->local_nls); | |
3306 | if (rc) { | |
3307 | mutex_unlock(&ses->session_mutex); | |
3308 | /* problem -- put our reference */ | |
3309 | cifs_put_smb_ses(ses); | |
6d5786a3 | 3310 | free_xid(xid); |
36988c76 JL |
3311 | return ERR_PTR(rc); |
3312 | } | |
3313 | } | |
3314 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
3315 | |
3316 | /* existing SMB ses has a server reference already */ | |
53e0e11e | 3317 | cifs_put_tcp_session(server, 0); |
6d5786a3 | 3318 | free_xid(xid); |
36988c76 JL |
3319 | return ses; |
3320 | } | |
3321 | ||
f96637be | 3322 | cifs_dbg(FYI, "Existing smb sess not found\n"); |
36988c76 JL |
3323 | ses = sesInfoAlloc(); |
3324 | if (ses == NULL) | |
3325 | goto get_ses_fail; | |
3326 | ||
3327 | /* new SMB session uses our server ref */ | |
3328 | ses->server = server; | |
a9f1b85e PS |
3329 | if (server->dstaddr.ss_family == AF_INET6) |
3330 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); | |
36988c76 | 3331 | else |
a9f1b85e | 3332 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
36988c76 | 3333 | |
8727c8a8 SF |
3334 | if (volume_info->username) { |
3335 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); | |
3336 | if (!ses->user_name) | |
3337 | goto get_ses_fail; | |
3338 | } | |
36988c76 JL |
3339 | |
3340 | /* volume_info->password freed at unmount */ | |
3341 | if (volume_info->password) { | |
3342 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
3343 | if (!ses->password) | |
3344 | goto get_ses_fail; | |
3345 | } | |
3346 | if (volume_info->domainname) { | |
d3686d54 SP |
3347 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
3348 | if (!ses->domainName) | |
3349 | goto get_ses_fail; | |
36988c76 | 3350 | } |
39566443 GP |
3351 | if (volume_info->domainauto) |
3352 | ses->domainAuto = volume_info->domainauto; | |
3e4b3e1f | 3353 | ses->cred_uid = volume_info->cred_uid; |
36988c76 | 3354 | ses->linux_uid = volume_info->linux_uid; |
d9b94201 | 3355 | |
28e11bd8 JL |
3356 | ses->sectype = volume_info->sectype; |
3357 | ses->sign = volume_info->sign; | |
36988c76 | 3358 | mutex_lock(&ses->session_mutex); |
d70e9fa5 AA |
3359 | |
3360 | /* add server as first channel */ | |
3361 | ses->chans[0].server = server; | |
3362 | ses->chan_count = 1; | |
3363 | ses->chan_max = volume_info->multichannel ? volume_info->max_channels:1; | |
3364 | ||
198b5682 JL |
3365 | rc = cifs_negotiate_protocol(xid, ses); |
3366 | if (!rc) | |
3367 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
d70e9fa5 AA |
3368 | |
3369 | /* each channel uses a different signing key */ | |
3370 | memcpy(ses->chans[0].signkey, ses->smb3signingkey, | |
3371 | sizeof(ses->smb3signingkey)); | |
3372 | ||
36988c76 | 3373 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 3374 | if (rc) |
36988c76 JL |
3375 | goto get_ses_fail; |
3376 | ||
d70e9fa5 | 3377 | /* success, put it on the list and add it as first channel */ |
3f9bcca7 | 3378 | spin_lock(&cifs_tcp_ses_lock); |
36988c76 | 3379 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
3f9bcca7 | 3380 | spin_unlock(&cifs_tcp_ses_lock); |
36988c76 | 3381 | |
6d5786a3 | 3382 | free_xid(xid); |
b327a717 AA |
3383 | |
3384 | cifs_setup_ipc(ses, volume_info); | |
3385 | ||
36988c76 JL |
3386 | return ses; |
3387 | ||
3388 | get_ses_fail: | |
3389 | sesInfoFree(ses); | |
6d5786a3 | 3390 | free_xid(xid); |
36988c76 JL |
3391 | return ERR_PTR(rc); |
3392 | } | |
3393 | ||
ae6f8dd4 | 3394 | static int match_tcon(struct cifs_tcon *tcon, struct smb_vol *volume_info) |
37bb04e5 PS |
3395 | { |
3396 | if (tcon->tidStatus == CifsExiting) | |
3397 | return 0; | |
ae6f8dd4 | 3398 | if (strncmp(tcon->treeName, volume_info->UNC, MAX_TREE_SIZE)) |
37bb04e5 | 3399 | return 0; |
ae6f8dd4 PS |
3400 | if (tcon->seal != volume_info->seal) |
3401 | return 0; | |
ae6f8dd4 PS |
3402 | if (tcon->snapshot_time != volume_info->snapshot_time) |
3403 | return 0; | |
ca567eb2 SF |
3404 | if (tcon->handle_timeout != volume_info->handle_timeout) |
3405 | return 0; | |
3e7a02d4 SF |
3406 | if (tcon->no_lease != volume_info->no_lease) |
3407 | return 0; | |
37bb04e5 PS |
3408 | return 1; |
3409 | } | |
3410 | ||
96daf2b0 | 3411 | static struct cifs_tcon * |
8b217fe7 | 3412 | cifs_find_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) |
f1987b44 JL |
3413 | { |
3414 | struct list_head *tmp; | |
96daf2b0 | 3415 | struct cifs_tcon *tcon; |
f1987b44 | 3416 | |
3f9bcca7 | 3417 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 3418 | list_for_each(tmp, &ses->tcon_list) { |
96daf2b0 | 3419 | tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
ae6f8dd4 | 3420 | if (!match_tcon(tcon, volume_info)) |
f1987b44 | 3421 | continue; |
f1987b44 | 3422 | ++tcon->tc_count; |
3f9bcca7 | 3423 | spin_unlock(&cifs_tcp_ses_lock); |
dea570e0 | 3424 | return tcon; |
1da177e4 | 3425 | } |
3f9bcca7 | 3426 | spin_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
3427 | return NULL; |
3428 | } | |
3429 | ||
53e0e11e | 3430 | void |
96daf2b0 | 3431 | cifs_put_tcon(struct cifs_tcon *tcon) |
f1987b44 | 3432 | { |
2e6e02ab | 3433 | unsigned int xid; |
b327a717 | 3434 | struct cifs_ses *ses; |
f1987b44 | 3435 | |
b327a717 AA |
3436 | /* |
3437 | * IPC tcon share the lifetime of their session and are | |
3438 | * destroyed in the session put function | |
3439 | */ | |
3440 | if (tcon == NULL || tcon->ipc) | |
3441 | return; | |
3442 | ||
3443 | ses = tcon->ses; | |
f96637be | 3444 | cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
3f9bcca7 | 3445 | spin_lock(&cifs_tcp_ses_lock); |
f1987b44 | 3446 | if (--tcon->tc_count > 0) { |
3f9bcca7 | 3447 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 JL |
3448 | return; |
3449 | } | |
3450 | ||
3451 | list_del_init(&tcon->tcon_list); | |
3f9bcca7 | 3452 | spin_unlock(&cifs_tcp_ses_lock); |
f1987b44 | 3453 | |
6d5786a3 | 3454 | xid = get_xid(); |
2e6e02ab PS |
3455 | if (ses->server->ops->tree_disconnect) |
3456 | ses->server->ops->tree_disconnect(xid, tcon); | |
6d5786a3 | 3457 | _free_xid(xid); |
f1987b44 | 3458 | |
d03382ce | 3459 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 3460 | tconInfoFree(tcon); |
f1987b44 JL |
3461 | cifs_put_smb_ses(ses); |
3462 | } | |
3463 | ||
4a1360d0 AA |
3464 | /** |
3465 | * cifs_get_tcon - get a tcon matching @volume_info data from @ses | |
3466 | * | |
3467 | * - tcon refcount is the number of mount points using the tcon. | |
3468 | * - ses refcount is the number of tcon using the session. | |
3469 | * | |
3470 | * 1. This function assumes it is being called from cifs_mount() where | |
3471 | * we already got a session reference (ses refcount +1). | |
3472 | * | |
3473 | * 2. Since we're in the context of adding a mount point, the end | |
3474 | * result should be either: | |
3475 | * | |
3476 | * a) a new tcon already allocated with refcount=1 (1 mount point) and | |
3477 | * its session refcount incremented (1 new tcon). This +1 was | |
3478 | * already done in (1). | |
3479 | * | |
3480 | * b) an existing tcon with refcount+1 (add a mount point to it) and | |
3481 | * identical ses refcount (no new tcon). Because of (1) we need to | |
3482 | * decrement the ses refcount. | |
3483 | */ | |
96daf2b0 SF |
3484 | static struct cifs_tcon * |
3485 | cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) | |
d00c28de JL |
3486 | { |
3487 | int rc, xid; | |
96daf2b0 | 3488 | struct cifs_tcon *tcon; |
d00c28de | 3489 | |
8b217fe7 | 3490 | tcon = cifs_find_tcon(ses, volume_info); |
d00c28de | 3491 | if (tcon) { |
4a1360d0 AA |
3492 | /* |
3493 | * tcon has refcount already incremented but we need to | |
3494 | * decrement extra ses reference gotten by caller (case b) | |
3495 | */ | |
f96637be | 3496 | cifs_dbg(FYI, "Found match on UNC path\n"); |
d00c28de | 3497 | cifs_put_smb_ses(ses); |
d00c28de JL |
3498 | return tcon; |
3499 | } | |
3500 | ||
2e6e02ab PS |
3501 | if (!ses->server->ops->tree_connect) { |
3502 | rc = -ENOSYS; | |
3503 | goto out_fail; | |
3504 | } | |
3505 | ||
d00c28de JL |
3506 | tcon = tconInfoAlloc(); |
3507 | if (tcon == NULL) { | |
3508 | rc = -ENOMEM; | |
3509 | goto out_fail; | |
3510 | } | |
3511 | ||
8b217fe7 | 3512 | if (volume_info->snapshot_time) { |
8b217fe7 SF |
3513 | if (ses->server->vals->protocol_id == 0) { |
3514 | cifs_dbg(VFS, | |
3515 | "Use SMB2 or later for snapshot mount option\n"); | |
3516 | rc = -EOPNOTSUPP; | |
3517 | goto out_fail; | |
3518 | } else | |
3519 | tcon->snapshot_time = volume_info->snapshot_time; | |
8b217fe7 SF |
3520 | } |
3521 | ||
ca567eb2 SF |
3522 | if (volume_info->handle_timeout) { |
3523 | if (ses->server->vals->protocol_id == 0) { | |
3524 | cifs_dbg(VFS, | |
3525 | "Use SMB2.1 or later for handle timeout option\n"); | |
3526 | rc = -EOPNOTSUPP; | |
3527 | goto out_fail; | |
3528 | } else | |
3529 | tcon->handle_timeout = volume_info->handle_timeout; | |
3530 | } | |
3531 | ||
d00c28de JL |
3532 | tcon->ses = ses; |
3533 | if (volume_info->password) { | |
3534 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
3535 | if (!tcon->password) { | |
3536 | rc = -ENOMEM; | |
3537 | goto out_fail; | |
3538 | } | |
3539 | } | |
3540 | ||
23657ad7 SF |
3541 | if (volume_info->seal) { |
3542 | if (ses->server->vals->protocol_id == 0) { | |
3543 | cifs_dbg(VFS, | |
3544 | "SMB3 or later required for encryption\n"); | |
3545 | rc = -EOPNOTSUPP; | |
3546 | goto out_fail; | |
3547 | } else if (tcon->ses->server->capabilities & | |
3548 | SMB2_GLOBAL_CAP_ENCRYPTION) | |
3549 | tcon->seal = true; | |
3550 | else { | |
3551 | cifs_dbg(VFS, "Encryption is not supported on share\n"); | |
3552 | rc = -EOPNOTSUPP; | |
3553 | goto out_fail; | |
3554 | } | |
3555 | } | |
3556 | ||
8505c8bf SF |
3557 | if (volume_info->linux_ext) { |
3558 | if (ses->server->posix_ext_supported) { | |
b326614e | 3559 | tcon->posix_extensions = true; |
2fbb5644 SF |
3560 | printk_once(KERN_WARNING |
3561 | "SMB3.11 POSIX Extensions are experimental\n"); | |
8505c8bf SF |
3562 | } else { |
3563 | cifs_dbg(VFS, "Server does not support mounting with posix SMB3.11 extensions.\n"); | |
3564 | rc = -EOPNOTSUPP; | |
3565 | goto out_fail; | |
2fbb5644 | 3566 | } |
b326614e | 3567 | } |
b326614e | 3568 | |
2e6e02ab PS |
3569 | /* |
3570 | * BB Do we need to wrap session_mutex around this TCon call and Unix | |
3571 | * SetFS as we do on SessSetup and reconnect? | |
3572 | */ | |
6d5786a3 | 3573 | xid = get_xid(); |
2e6e02ab PS |
3574 | rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon, |
3575 | volume_info->local_nls); | |
6d5786a3 | 3576 | free_xid(xid); |
f96637be | 3577 | cifs_dbg(FYI, "Tcon rc = %d\n", rc); |
d00c28de JL |
3578 | if (rc) |
3579 | goto out_fail; | |
3580 | ||
b618f001 SF |
3581 | tcon->use_persistent = false; |
3582 | /* check if SMB2 or later, CIFS does not support persistent handles */ | |
3583 | if (volume_info->persistent) { | |
3584 | if (ses->server->vals->protocol_id == 0) { | |
3585 | cifs_dbg(VFS, | |
3586 | "SMB3 or later required for persistent handles\n"); | |
3587 | rc = -EOPNOTSUPP; | |
3588 | goto out_fail; | |
3589 | } else if (ses->server->capabilities & | |
3590 | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) | |
3591 | tcon->use_persistent = true; | |
3592 | else /* persistent handles requested but not supported */ { | |
3593 | cifs_dbg(VFS, | |
3594 | "Persistent handles not supported on share\n"); | |
3595 | rc = -EOPNOTSUPP; | |
3596 | goto out_fail; | |
3597 | } | |
3598 | } else if ((tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) | |
3599 | && (ses->server->capabilities & SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) | |
3600 | && (volume_info->nopersistent == false)) { | |
3601 | cifs_dbg(FYI, "enabling persistent handles\n"); | |
3602 | tcon->use_persistent = true; | |
592fafe6 SF |
3603 | } else if (volume_info->resilient) { |
3604 | if (ses->server->vals->protocol_id == 0) { | |
3605 | cifs_dbg(VFS, | |
3606 | "SMB2.1 or later required for resilient handles\n"); | |
3607 | rc = -EOPNOTSUPP; | |
3608 | goto out_fail; | |
3609 | } | |
3610 | tcon->use_resilient = true; | |
b618f001 SF |
3611 | } |
3612 | ||
cae53f70 SF |
3613 | /* If the user really knows what they are doing they can override */ |
3614 | if (tcon->share_flags & SMB2_SHAREFLAG_NO_CACHING) { | |
3615 | if (volume_info->cache_ro) | |
3616 | cifs_dbg(VFS, "cache=ro requested on mount but NO_CACHING flag set on share\n"); | |
3617 | else if (volume_info->cache_rw) | |
3618 | cifs_dbg(VFS, "cache=singleclient requested on mount but NO_CACHING flag set on share\n"); | |
3619 | } | |
3620 | ||
2e6e02ab PS |
3621 | /* |
3622 | * We can have only one retry value for a connection to a share so for | |
3623 | * resources mounted more than once to the same server share the last | |
3624 | * value passed in for the retry flag is used. | |
3625 | */ | |
d00c28de JL |
3626 | tcon->retry = volume_info->retry; |
3627 | tcon->nocase = volume_info->nocase; | |
3d4ef9a1 | 3628 | tcon->nohandlecache = volume_info->nohandlecache; |
d00c28de | 3629 | tcon->local_lease = volume_info->local_lease; |
3e7a02d4 | 3630 | tcon->no_lease = volume_info->no_lease; |
233839b1 | 3631 | INIT_LIST_HEAD(&tcon->pending_opens); |
d00c28de | 3632 | |
3f9bcca7 | 3633 | spin_lock(&cifs_tcp_ses_lock); |
d00c28de | 3634 | list_add(&tcon->tcon_list, &ses->tcon_list); |
3f9bcca7 | 3635 | spin_unlock(&cifs_tcp_ses_lock); |
d00c28de | 3636 | |
d03382ce SJ |
3637 | cifs_fscache_get_super_cookie(tcon); |
3638 | ||
d00c28de JL |
3639 | return tcon; |
3640 | ||
3641 | out_fail: | |
3642 | tconInfoFree(tcon); | |
3643 | return ERR_PTR(rc); | |
3644 | } | |
3645 | ||
9d002df4 JL |
3646 | void |
3647 | cifs_put_tlink(struct tcon_link *tlink) | |
3648 | { | |
3649 | if (!tlink || IS_ERR(tlink)) | |
3650 | return; | |
3651 | ||
3652 | if (!atomic_dec_and_test(&tlink->tl_count) || | |
3653 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { | |
3654 | tlink->tl_time = jiffies; | |
3655 | return; | |
3656 | } | |
3657 | ||
3658 | if (!IS_ERR(tlink_tcon(tlink))) | |
3659 | cifs_put_tcon(tlink_tcon(tlink)); | |
3660 | kfree(tlink); | |
3661 | return; | |
3662 | } | |
d00c28de | 3663 | |
25c7f41e PS |
3664 | static int |
3665 | compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
3666 | { | |
3667 | struct cifs_sb_info *old = CIFS_SB(sb); | |
3668 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
29fbeb7a PAS |
3669 | unsigned int oldflags = old->mnt_cifs_flags & CIFS_MOUNT_MASK; |
3670 | unsigned int newflags = new->mnt_cifs_flags & CIFS_MOUNT_MASK; | |
25c7f41e PS |
3671 | |
3672 | if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) | |
3673 | return 0; | |
3674 | ||
29fbeb7a PAS |
3675 | if (old->mnt_cifs_serverino_autodisabled) |
3676 | newflags &= ~CIFS_MOUNT_SERVER_INUM; | |
3677 | ||
3678 | if (oldflags != newflags) | |
25c7f41e PS |
3679 | return 0; |
3680 | ||
25c7f41e | 3681 | /* |
5eba8ab3 JL |
3682 | * We want to share sb only if we don't specify an r/wsize or |
3683 | * specified r/wsize is greater than or equal to existing one. | |
25c7f41e PS |
3684 | */ |
3685 | if (new->wsize && new->wsize < old->wsize) | |
3686 | return 0; | |
3687 | ||
5eba8ab3 JL |
3688 | if (new->rsize && new->rsize < old->rsize) |
3689 | return 0; | |
3690 | ||
1f68233c | 3691 | if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid)) |
25c7f41e PS |
3692 | return 0; |
3693 | ||
3694 | if (old->mnt_file_mode != new->mnt_file_mode || | |
3695 | old->mnt_dir_mode != new->mnt_dir_mode) | |
3696 | return 0; | |
3697 | ||
3698 | if (strcmp(old->local_nls->charset, new->local_nls->charset)) | |
3699 | return 0; | |
3700 | ||
3701 | if (old->actimeo != new->actimeo) | |
3702 | return 0; | |
3703 | ||
3704 | return 1; | |
3705 | } | |
3706 | ||
c1d8b24d SP |
3707 | static int |
3708 | match_prepath(struct super_block *sb, struct cifs_mnt_data *mnt_data) | |
3709 | { | |
3710 | struct cifs_sb_info *old = CIFS_SB(sb); | |
3711 | struct cifs_sb_info *new = mnt_data->cifs_sb; | |
fe129268 RS |
3712 | bool old_set = (old->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) && |
3713 | old->prepath; | |
3714 | bool new_set = (new->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) && | |
3715 | new->prepath; | |
c1d8b24d | 3716 | |
cd8c4296 | 3717 | if (old_set && new_set && !strcmp(new->prepath, old->prepath)) |
c1d8b24d | 3718 | return 1; |
cd8c4296 SP |
3719 | else if (!old_set && !new_set) |
3720 | return 1; | |
3721 | ||
c1d8b24d SP |
3722 | return 0; |
3723 | } | |
3724 | ||
25c7f41e PS |
3725 | int |
3726 | cifs_match_super(struct super_block *sb, void *data) | |
3727 | { | |
3728 | struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; | |
3729 | struct smb_vol *volume_info; | |
3730 | struct cifs_sb_info *cifs_sb; | |
3731 | struct TCP_Server_Info *tcp_srv; | |
96daf2b0 SF |
3732 | struct cifs_ses *ses; |
3733 | struct cifs_tcon *tcon; | |
25c7f41e | 3734 | struct tcon_link *tlink; |
25c7f41e PS |
3735 | int rc = 0; |
3736 | ||
25c7f41e PS |
3737 | spin_lock(&cifs_tcp_ses_lock); |
3738 | cifs_sb = CIFS_SB(sb); | |
3739 | tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
3740 | if (IS_ERR(tlink)) { | |
3741 | spin_unlock(&cifs_tcp_ses_lock); | |
3742 | return rc; | |
3743 | } | |
3744 | tcon = tlink_tcon(tlink); | |
3745 | ses = tcon->ses; | |
3746 | tcp_srv = ses->server; | |
3747 | ||
3748 | volume_info = mnt_data->vol; | |
3749 | ||
9fa114f7 | 3750 | if (!match_server(tcp_srv, volume_info) || |
25c7f41e | 3751 | !match_session(ses, volume_info) || |
ae6f8dd4 | 3752 | !match_tcon(tcon, volume_info) || |
c1d8b24d | 3753 | !match_prepath(sb, mnt_data)) { |
25c7f41e PS |
3754 | rc = 0; |
3755 | goto out; | |
3756 | } | |
3757 | ||
3758 | rc = compare_mount_options(sb, mnt_data); | |
3759 | out: | |
25c7f41e | 3760 | spin_unlock(&cifs_tcp_ses_lock); |
f484b5d0 | 3761 | cifs_put_tlink(tlink); |
25c7f41e PS |
3762 | return rc; |
3763 | } | |
3764 | ||
09e50d55 JL |
3765 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
3766 | static struct lock_class_key cifs_key[2]; | |
3767 | static struct lock_class_key cifs_slock_key[2]; | |
3768 | ||
3769 | static inline void | |
3770 | cifs_reclassify_socket4(struct socket *sock) | |
3771 | { | |
3772 | struct sock *sk = sock->sk; | |
fafc4e1e | 3773 | BUG_ON(!sock_allow_reclassification(sk)); |
09e50d55 JL |
3774 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", |
3775 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
3776 | } | |
3777 | ||
3778 | static inline void | |
3779 | cifs_reclassify_socket6(struct socket *sock) | |
3780 | { | |
3781 | struct sock *sk = sock->sk; | |
fafc4e1e | 3782 | BUG_ON(!sock_allow_reclassification(sk)); |
09e50d55 JL |
3783 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", |
3784 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
3785 | } | |
3786 | #else | |
3787 | static inline void | |
3788 | cifs_reclassify_socket4(struct socket *sock) | |
3789 | { | |
3790 | } | |
3791 | ||
3792 | static inline void | |
3793 | cifs_reclassify_socket6(struct socket *sock) | |
3794 | { | |
3795 | } | |
3796 | #endif | |
3797 | ||
1da177e4 | 3798 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 3799 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 3800 | { |
50c2f753 | 3801 | unsigned int i, j; |
1da177e4 | 3802 | |
50c2f753 | 3803 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
3804 | /* mask a nibble at a time and encode */ |
3805 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
3806 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 3807 | j += 2; |
1da177e4 LT |
3808 | } |
3809 | ||
3810 | } | |
3811 | ||
3eb9a889 BG |
3812 | static int |
3813 | bind_socket(struct TCP_Server_Info *server) | |
3814 | { | |
3815 | int rc = 0; | |
3816 | if (server->srcaddr.ss_family != AF_UNSPEC) { | |
3817 | /* Bind to the specified local IP address */ | |
3818 | struct socket *socket = server->ssocket; | |
3819 | rc = socket->ops->bind(socket, | |
3820 | (struct sockaddr *) &server->srcaddr, | |
3821 | sizeof(server->srcaddr)); | |
3822 | if (rc < 0) { | |
3823 | struct sockaddr_in *saddr4; | |
3824 | struct sockaddr_in6 *saddr6; | |
3825 | saddr4 = (struct sockaddr_in *)&server->srcaddr; | |
3826 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; | |
3827 | if (saddr6->sin6_family == AF_INET6) | |
afe6f653 | 3828 | cifs_server_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n", |
f96637be | 3829 | &saddr6->sin6_addr, rc); |
3eb9a889 | 3830 | else |
afe6f653 | 3831 | cifs_server_dbg(VFS, "Failed to bind to: %pI4, error: %d\n", |
f96637be | 3832 | &saddr4->sin_addr.s_addr, rc); |
3eb9a889 BG |
3833 | } |
3834 | } | |
3835 | return rc; | |
3836 | } | |
1da177e4 LT |
3837 | |
3838 | static int | |
a9f1b85e | 3839 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
3840 | { |
3841 | int rc = 0; | |
a9f1b85e PS |
3842 | /* |
3843 | * some servers require RFC1001 sessinit before sending | |
3844 | * negprot - BB check reconnection in case where second | |
3845 | * sessinit is sent but no second negprot | |
3846 | */ | |
3847 | struct rfc1002_session_packet *ses_init_buf; | |
3848 | struct smb_hdr *smb_buf; | |
3849 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
3850 | GFP_KERNEL); | |
3851 | if (ses_init_buf) { | |
3852 | ses_init_buf->trailer.session_req.called_len = 32; | |
3853 | ||
997152f6 | 3854 | if (server->server_RFC1001_name[0] != 0) |
a9f1b85e PS |
3855 | rfc1002mangle(ses_init_buf->trailer. |
3856 | session_req.called_name, | |
3857 | server->server_RFC1001_name, | |
3858 | RFC1001_NAME_LEN_WITH_NULL); | |
3859 | else | |
3860 | rfc1002mangle(ses_init_buf->trailer. | |
3861 | session_req.called_name, | |
3862 | DEFAULT_CIFS_CALLED_NAME, | |
3863 | RFC1001_NAME_LEN_WITH_NULL); | |
3864 | ||
3865 | ses_init_buf->trailer.session_req.calling_len = 32; | |
3866 | ||
3867 | /* | |
3868 | * calling name ends in null (byte 16) from old smb | |
3869 | * convention. | |
3870 | */ | |
c85c35f8 | 3871 | if (server->workstation_RFC1001_name[0] != 0) |
a9f1b85e PS |
3872 | rfc1002mangle(ses_init_buf->trailer. |
3873 | session_req.calling_name, | |
3874 | server->workstation_RFC1001_name, | |
3875 | RFC1001_NAME_LEN_WITH_NULL); | |
3876 | else | |
3877 | rfc1002mangle(ses_init_buf->trailer. | |
3878 | session_req.calling_name, | |
3879 | "LINUX_CIFS_CLNT", | |
3880 | RFC1001_NAME_LEN_WITH_NULL); | |
3881 | ||
3882 | ses_init_buf->trailer.session_req.scope1 = 0; | |
3883 | ses_init_buf->trailer.session_req.scope2 = 0; | |
3884 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
3885 | ||
3886 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
be8e3b00 | 3887 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
a9f1b85e PS |
3888 | rc = smb_send(server, smb_buf, 0x44); |
3889 | kfree(ses_init_buf); | |
3890 | /* | |
3891 | * RFC1001 layer in at least one server | |
3892 | * requires very short break before negprot | |
3893 | * presumably because not expecting negprot | |
3894 | * to follow so fast. This is a simple | |
3895 | * solution that works without | |
3896 | * complicating the code and causes no | |
3897 | * significant slowing down on mount | |
3898 | * for everyone else | |
3899 | */ | |
3900 | usleep_range(1000, 2000); | |
3901 | } | |
3902 | /* | |
3903 | * else the negprot may still work without this | |
3904 | * even though malloc failed | |
3905 | */ | |
3906 | ||
3907 | return rc; | |
3908 | } | |
3909 | ||
3910 | static int | |
3911 | generic_ip_connect(struct TCP_Server_Info *server) | |
3912 | { | |
3913 | int rc = 0; | |
6da97910 | 3914 | __be16 sport; |
a9f1b85e | 3915 | int slen, sfamily; |
bcf4b106 | 3916 | struct socket *socket = server->ssocket; |
a9f1b85e PS |
3917 | struct sockaddr *saddr; |
3918 | ||
3919 | saddr = (struct sockaddr *) &server->dstaddr; | |
3920 | ||
3921 | if (server->dstaddr.ss_family == AF_INET6) { | |
3922 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; | |
3923 | slen = sizeof(struct sockaddr_in6); | |
3924 | sfamily = AF_INET6; | |
3925 | } else { | |
3926 | sport = ((struct sockaddr_in *) saddr)->sin_port; | |
3927 | slen = sizeof(struct sockaddr_in); | |
3928 | sfamily = AF_INET; | |
3929 | } | |
1da177e4 | 3930 | |
bcf4b106 | 3931 | if (socket == NULL) { |
f1d0c998 RL |
3932 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
3933 | IPPROTO_TCP, &socket, 1); | |
1da177e4 | 3934 | if (rc < 0) { |
afe6f653 | 3935 | cifs_server_dbg(VFS, "Error %d creating socket\n", rc); |
a9f1b85e | 3936 | server->ssocket = NULL; |
1da177e4 | 3937 | return rc; |
1da177e4 | 3938 | } |
bcf4b106 JL |
3939 | |
3940 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
f96637be | 3941 | cifs_dbg(FYI, "Socket created\n"); |
bcf4b106 JL |
3942 | server->ssocket = socket; |
3943 | socket->sk->sk_allocation = GFP_NOFS; | |
a9f1b85e PS |
3944 | if (sfamily == AF_INET6) |
3945 | cifs_reclassify_socket6(socket); | |
3946 | else | |
3947 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
3948 | } |
3949 | ||
3eb9a889 BG |
3950 | rc = bind_socket(server); |
3951 | if (rc < 0) | |
3952 | return rc; | |
3953 | ||
bcf4b106 JL |
3954 | /* |
3955 | * Eventually check for other socket options to change from | |
a9f1b85e PS |
3956 | * the default. sock_setsockopt not used because it expects |
3957 | * user space buffer | |
bcf4b106 JL |
3958 | */ |
3959 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 3960 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 3961 | |
b387eaeb | 3962 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
3963 | if (server->noautotune) { |
3964 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
3965 | socket->sk->sk_sndbuf = 200 * 1024; | |
3966 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
3967 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 3968 | } |
1da177e4 | 3969 | |
6a5fa236 | 3970 | if (server->tcp_nodelay) { |
a9f1b85e | 3971 | int val = 1; |
6a5fa236 SF |
3972 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
3973 | (char *)&val, sizeof(val)); | |
3974 | if (rc) | |
f96637be JP |
3975 | cifs_dbg(FYI, "set TCP_NODELAY socket option error %d\n", |
3976 | rc); | |
6a5fa236 SF |
3977 | } |
3978 | ||
f96637be | 3979 | cifs_dbg(FYI, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n", |
bcf4b106 | 3980 | socket->sk->sk_sndbuf, |
b6b38f70 | 3981 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 3982 | |
8eecd1c2 PAS |
3983 | rc = socket->ops->connect(socket, saddr, slen, |
3984 | server->noblockcnt ? O_NONBLOCK : 0); | |
d532cc7e PAS |
3985 | /* |
3986 | * When mounting SMB root file systems, we do not want to block in | |
3987 | * connect. Otherwise bail out and then let cifs_reconnect() perform | |
3988 | * reconnect failover - if possible. | |
3989 | */ | |
3990 | if (server->noblockcnt && rc == -EINPROGRESS) | |
8eecd1c2 | 3991 | rc = 0; |
ee1b3ea9 | 3992 | if (rc < 0) { |
f96637be | 3993 | cifs_dbg(FYI, "Error %d connecting to server\n", rc); |
ee1b3ea9 JL |
3994 | sock_release(socket); |
3995 | server->ssocket = NULL; | |
3996 | return rc; | |
3997 | } | |
3998 | ||
a9f1b85e PS |
3999 | if (sport == htons(RFC1001_PORT)) |
4000 | rc = ip_rfc1001_connect(server); | |
50c2f753 | 4001 | |
1da177e4 LT |
4002 | return rc; |
4003 | } | |
4004 | ||
4005 | static int | |
a9f1b85e | 4006 | ip_connect(struct TCP_Server_Info *server) |
1da177e4 | 4007 | { |
6da97910 | 4008 | __be16 *sport; |
a9f1b85e PS |
4009 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
4010 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; | |
1da177e4 | 4011 | |
a9f1b85e PS |
4012 | if (server->dstaddr.ss_family == AF_INET6) |
4013 | sport = &addr6->sin6_port; | |
4014 | else | |
4015 | sport = &addr->sin_port; | |
1da177e4 | 4016 | |
a9f1b85e PS |
4017 | if (*sport == 0) { |
4018 | int rc; | |
1da177e4 | 4019 | |
a9f1b85e PS |
4020 | /* try with 445 port at first */ |
4021 | *sport = htons(CIFS_PORT); | |
3eb9a889 | 4022 | |
a9f1b85e | 4023 | rc = generic_ip_connect(server); |
1da177e4 | 4024 | if (rc >= 0) |
a9f1b85e | 4025 | return rc; |
6a5fa236 | 4026 | |
a9f1b85e PS |
4027 | /* if it failed, try with 139 port */ |
4028 | *sport = htons(RFC1001_PORT); | |
6a5fa236 SF |
4029 | } |
4030 | ||
a9f1b85e | 4031 | return generic_ip_connect(server); |
1da177e4 LT |
4032 | } |
4033 | ||
6d5786a3 | 4034 | void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon, |
2c6292ae | 4035 | struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) |
8af18971 SF |
4036 | { |
4037 | /* if we are reconnecting then should we check to see if | |
4038 | * any requested capabilities changed locally e.g. via | |
4039 | * remount but we can not do much about it here | |
4040 | * if they have (even if we could detect it by the following) | |
4041 | * Perhaps we could add a backpointer to array of sb from tcon | |
4042 | * or if we change to make all sb to same share the same | |
4043 | * sb as NFS - then we only have one backpointer to sb. | |
4044 | * What if we wanted to mount the server share twice once with | |
4045 | * and once without posixacls or posix paths? */ | |
4046 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 4047 | |
c18c842b SF |
4048 | if (vol_info && vol_info->no_linux_ext) { |
4049 | tcon->fsUnixInfo.Capability = 0; | |
4050 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
f96637be | 4051 | cifs_dbg(FYI, "Linux protocol extensions disabled\n"); |
c18c842b SF |
4052 | return; |
4053 | } else if (vol_info) | |
4054 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
4055 | ||
4056 | if (tcon->unix_ext == 0) { | |
f96637be | 4057 | cifs_dbg(FYI, "Unix extensions disabled so not set on reconnect\n"); |
c18c842b SF |
4058 | return; |
4059 | } | |
50c2f753 | 4060 | |
fb8c4b14 | 4061 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 4062 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
f96637be | 4063 | cifs_dbg(FYI, "unix caps which server supports %lld\n", cap); |
8af18971 SF |
4064 | /* check for reconnect case in which we do not |
4065 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 4066 | if (vol_info == NULL) { |
50c2f753 | 4067 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
4068 | originally at mount time */ |
4069 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
4070 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
4071 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
4072 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
f96637be | 4073 | cifs_dbg(VFS, "POSIXPATH support change\n"); |
8af18971 | 4074 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 4075 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
f96637be JP |
4076 | cifs_dbg(VFS, "possible reconnect error\n"); |
4077 | cifs_dbg(VFS, "server disabled POSIX path support\n"); | |
11b6d645 | 4078 | } |
8af18971 | 4079 | } |
50c2f753 | 4080 | |
6848b733 | 4081 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
f96637be | 4082 | cifs_dbg(VFS, "per-share encryption not supported yet\n"); |
6848b733 | 4083 | |
8af18971 | 4084 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 4085 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 4086 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 4087 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
f96637be | 4088 | cifs_dbg(FYI, "negotiated posix acl support\n"); |
2c6292ae AV |
4089 | if (cifs_sb) |
4090 | cifs_sb->mnt_cifs_flags |= | |
4091 | CIFS_MOUNT_POSIXACL; | |
8af18971 SF |
4092 | } |
4093 | ||
75865f8c | 4094 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 4095 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 4096 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
f96637be | 4097 | cifs_dbg(FYI, "negotiate posix pathnames\n"); |
2c6292ae AV |
4098 | if (cifs_sb) |
4099 | cifs_sb->mnt_cifs_flags |= | |
8af18971 SF |
4100 | CIFS_MOUNT_POSIX_PATHS; |
4101 | } | |
50c2f753 | 4102 | |
f96637be | 4103 | cifs_dbg(FYI, "Negotiate caps 0x%x\n", (int)cap); |
8af18971 | 4104 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 4105 | if (cap & CIFS_UNIX_FCNTL_CAP) |
f96637be | 4106 | cifs_dbg(FYI, "FCNTL cap\n"); |
75865f8c | 4107 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
f96637be | 4108 | cifs_dbg(FYI, "EXTATTR cap\n"); |
75865f8c | 4109 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
f96637be | 4110 | cifs_dbg(FYI, "POSIX path cap\n"); |
75865f8c | 4111 | if (cap & CIFS_UNIX_XATTR_CAP) |
f96637be | 4112 | cifs_dbg(FYI, "XATTR cap\n"); |
75865f8c | 4113 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
f96637be | 4114 | cifs_dbg(FYI, "POSIX ACL cap\n"); |
75865f8c | 4115 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
f96637be | 4116 | cifs_dbg(FYI, "very large read cap\n"); |
75865f8c | 4117 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
f96637be | 4118 | cifs_dbg(FYI, "very large write cap\n"); |
6848b733 | 4119 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
f96637be | 4120 | cifs_dbg(FYI, "transport encryption cap\n"); |
6848b733 | 4121 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
f96637be | 4122 | cifs_dbg(FYI, "mandatory transport encryption cap\n"); |
8af18971 SF |
4123 | #endif /* CIFS_DEBUG2 */ |
4124 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 4125 | if (vol_info == NULL) { |
f96637be | 4126 | cifs_dbg(FYI, "resetting capabilities failed\n"); |
442aa310 | 4127 | } else |
f96637be | 4128 | 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 | 4129 | |
8af18971 SF |
4130 | } |
4131 | } | |
4132 | } | |
4133 | ||
4214ebf4 | 4134 | int cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
724d9f1c | 4135 | struct cifs_sb_info *cifs_sb) |
b1c8d2b4 | 4136 | { |
2de970ff JL |
4137 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
4138 | ||
2ced6f69 AV |
4139 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
4140 | cifs_sb->tlink_tree = RB_ROOT; | |
4141 | ||
e8506d25 | 4142 | cifs_sb->bsize = pvolume_info->bsize; |
25c7f41e | 4143 | /* |
5eba8ab3 JL |
4144 | * Temporarily set r/wsize for matching superblock. If we end up using |
4145 | * new sb then client will later negotiate it downward if needed. | |
25c7f41e | 4146 | */ |
5eba8ab3 | 4147 | cifs_sb->rsize = pvolume_info->rsize; |
25c7f41e PS |
4148 | cifs_sb->wsize = pvolume_info->wsize; |
4149 | ||
3b795210 SF |
4150 | cifs_sb->mnt_uid = pvolume_info->linux_uid; |
4151 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
4152 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
4153 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
f52aa79d | 4154 | cifs_dbg(FYI, "file mode: %04ho dir mode: %04ho\n", |
f96637be | 4155 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); |
3b795210 | 4156 | |
6d20e840 | 4157 | cifs_sb->actimeo = pvolume_info->actimeo; |
724d9f1c | 4158 | cifs_sb->local_nls = pvolume_info->local_nls; |
6d20e840 | 4159 | |
8393072b AA |
4160 | if (pvolume_info->nodfs) |
4161 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_DFS; | |
3b795210 SF |
4162 | if (pvolume_info->noperm) |
4163 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
4164 | if (pvolume_info->setuids) | |
4165 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
95932655 SF |
4166 | if (pvolume_info->setuidfromacl) |
4167 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UID_FROM_ACL; | |
3b795210 SF |
4168 | if (pvolume_info->server_ino) |
4169 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
4170 | if (pvolume_info->remap) | |
2baa2682 SF |
4171 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SFM_CHR; |
4172 | if (pvolume_info->sfu_remap) | |
3b795210 SF |
4173 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; |
4174 | if (pvolume_info->no_xattr) | |
4175 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
4176 | if (pvolume_info->sfu_emul) | |
4177 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
4178 | if (pvolume_info->nobrl) | |
4179 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
3d4ef9a1 SF |
4180 | if (pvolume_info->nohandlecache) |
4181 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_HANDLE_CACHE; | |
be652445 | 4182 | if (pvolume_info->nostrictsync) |
4717bed6 | 4183 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
4184 | if (pvolume_info->mand_lock) |
4185 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
d4ffff1f PS |
4186 | if (pvolume_info->rwpidforward) |
4187 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; | |
412094a8 SF |
4188 | if (pvolume_info->mode_ace) |
4189 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MODE_FROM_SID; | |
3b795210 SF |
4190 | if (pvolume_info->cifs_acl) |
4191 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
3c7c87fd | 4192 | if (pvolume_info->backupuid_specified) { |
3d3ea8e6 | 4193 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; |
3c7c87fd SP |
4194 | cifs_sb->mnt_backupuid = pvolume_info->backupuid; |
4195 | } | |
4196 | if (pvolume_info->backupgid_specified) { | |
3d3ea8e6 | 4197 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; |
3c7c87fd SP |
4198 | cifs_sb->mnt_backupgid = pvolume_info->backupgid; |
4199 | } | |
3b795210 SF |
4200 | if (pvolume_info->override_uid) |
4201 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
4202 | if (pvolume_info->override_gid) | |
4203 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
4204 | if (pvolume_info->dynperm) | |
4205 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
4206 | if (pvolume_info->fsc) |
4207 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
0eb8a132 JL |
4208 | if (pvolume_info->multiuser) |
4209 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | | |
4210 | CIFS_MOUNT_NO_PERM); | |
d39454ff PS |
4211 | if (pvolume_info->strict_io) |
4212 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; | |
3b795210 | 4213 | if (pvolume_info->direct_io) { |
f96637be | 4214 | cifs_dbg(FYI, "mounting share using direct i/o\n"); |
3b795210 SF |
4215 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
4216 | } | |
83bbfa70 SF |
4217 | if (pvolume_info->cache_ro) { |
4218 | cifs_dbg(VFS, "mounting share with read only caching. Ensure that the share will not be modified while in use.\n"); | |
4219 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RO_CACHE; | |
41e033fe SF |
4220 | } else if (pvolume_info->cache_rw) { |
4221 | cifs_dbg(VFS, "mounting share in single client RW caching mode. Ensure that no other systems will be accessing the share.\n"); | |
4222 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_RO_CACHE | | |
4223 | CIFS_MOUNT_RW_CACHE); | |
83bbfa70 | 4224 | } |
736a3320 SM |
4225 | if (pvolume_info->mfsymlinks) { |
4226 | if (pvolume_info->sfu_emul) { | |
db8b631d SF |
4227 | /* |
4228 | * Our SFU ("Services for Unix" emulation does not allow | |
4229 | * creating symlinks but does allow reading existing SFU | |
4230 | * symlinks (it does allow both creating and reading SFU | |
4231 | * style mknod and FIFOs though). When "mfsymlinks" and | |
4232 | * "sfu" are both enabled at the same time, it allows | |
4233 | * reading both types of symlinks, but will only create | |
4234 | * them with mfsymlinks format. This allows better | |
4235 | * Apple compatibility (probably better for Samba too) | |
4236 | * while still recognizing old Windows style symlinks. | |
4237 | */ | |
4238 | cifs_dbg(VFS, "mount options mfsymlinks and sfu both enabled\n"); | |
736a3320 | 4239 | } |
db8b631d | 4240 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; |
736a3320 | 4241 | } |
3b795210 SF |
4242 | |
4243 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
f96637be | 4244 | cifs_dbg(VFS, "mount option dynperm ignored if cifsacl mount option supported\n"); |
4214ebf4 SP |
4245 | |
4246 | if (pvolume_info->prepath) { | |
4247 | cifs_sb->prepath = kstrdup(pvolume_info->prepath, GFP_KERNEL); | |
4248 | if (cifs_sb->prepath == NULL) | |
4249 | return -ENOMEM; | |
4250 | } | |
4251 | ||
4252 | return 0; | |
b1c8d2b4 JL |
4253 | } |
4254 | ||
56c762eb PA |
4255 | void |
4256 | cifs_cleanup_volume_info_contents(struct smb_vol *volume_info) | |
1bfe73c2 | 4257 | { |
b946845a | 4258 | kfree(volume_info->username); |
1bfe73c2 | 4259 | kzfree(volume_info->password); |
95c75454 | 4260 | kfree(volume_info->UNC); |
b946845a SF |
4261 | kfree(volume_info->domainname); |
4262 | kfree(volume_info->iocharset); | |
1bfe73c2 | 4263 | kfree(volume_info->prepath); |
b9bce2e9 JL |
4264 | } |
4265 | ||
4266 | void | |
4267 | cifs_cleanup_volume_info(struct smb_vol *volume_info) | |
4268 | { | |
4269 | if (!volume_info) | |
4270 | return; | |
56c762eb | 4271 | cifs_cleanup_volume_info_contents(volume_info); |
1bfe73c2 | 4272 | kfree(volume_info); |
1bfe73c2 IM |
4273 | } |
4274 | ||
56c762eb PA |
4275 | /* Release all succeed connections */ |
4276 | static inline void mount_put_conns(struct cifs_sb_info *cifs_sb, | |
4277 | unsigned int xid, | |
4278 | struct TCP_Server_Info *server, | |
4279 | struct cifs_ses *ses, struct cifs_tcon *tcon) | |
4280 | { | |
4281 | int rc = 0; | |
4282 | ||
4283 | if (tcon) | |
4284 | cifs_put_tcon(tcon); | |
4285 | else if (ses) | |
4286 | cifs_put_smb_ses(ses); | |
4287 | else if (server) | |
4288 | cifs_put_tcp_session(server, 0); | |
4289 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_POSIX_PATHS; | |
4290 | free_xid(xid); | |
4291 | } | |
4292 | ||
4293 | /* Get connections for tcp, ses and tcon */ | |
4294 | static int mount_get_conns(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, | |
4295 | unsigned int *xid, | |
4296 | struct TCP_Server_Info **nserver, | |
4297 | struct cifs_ses **nses, struct cifs_tcon **ntcon) | |
4298 | { | |
4299 | int rc = 0; | |
4300 | struct TCP_Server_Info *server; | |
4301 | struct cifs_ses *ses; | |
4302 | struct cifs_tcon *tcon; | |
4303 | ||
4304 | *nserver = NULL; | |
4305 | *nses = NULL; | |
4306 | *ntcon = NULL; | |
4307 | ||
4308 | *xid = get_xid(); | |
4309 | ||
4310 | /* get a reference to a tcp session */ | |
4311 | server = cifs_get_tcp_session(vol); | |
4312 | if (IS_ERR(server)) { | |
4313 | rc = PTR_ERR(server); | |
4314 | return rc; | |
4315 | } | |
4316 | ||
4317 | *nserver = server; | |
4318 | ||
4319 | if ((vol->max_credits < 20) || (vol->max_credits > 60000)) | |
4320 | server->max_credits = SMB2_MAX_CREDITS_AVAILABLE; | |
4321 | else | |
4322 | server->max_credits = vol->max_credits; | |
4323 | ||
4324 | /* get a reference to a SMB session */ | |
4325 | ses = cifs_get_smb_ses(server, vol); | |
4326 | if (IS_ERR(ses)) { | |
4327 | rc = PTR_ERR(ses); | |
4328 | return rc; | |
4329 | } | |
4330 | ||
4331 | *nses = ses; | |
4332 | ||
4333 | if ((vol->persistent == true) && (!(ses->server->capabilities & | |
4334 | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES))) { | |
afe6f653 | 4335 | cifs_server_dbg(VFS, "persistent handles not supported by server\n"); |
56c762eb PA |
4336 | return -EOPNOTSUPP; |
4337 | } | |
4338 | ||
4339 | /* search for existing tcon to this server share */ | |
4340 | tcon = cifs_get_tcon(ses, vol); | |
4341 | if (IS_ERR(tcon)) { | |
4342 | rc = PTR_ERR(tcon); | |
4343 | return rc; | |
4344 | } | |
4345 | ||
4346 | *ntcon = tcon; | |
4347 | ||
4348 | /* if new SMB3.11 POSIX extensions are supported do not remap / and \ */ | |
4349 | if (tcon->posix_extensions) | |
4350 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_POSIX_PATHS; | |
4351 | ||
4352 | /* tell server which Unix caps we support */ | |
4353 | if (cap_unix(tcon->ses)) { | |
4354 | /* | |
4355 | * reset of caps checks mount to see if unix extensions disabled | |
4356 | * for just this mount. | |
4357 | */ | |
4358 | reset_cifs_unix_caps(*xid, tcon, cifs_sb, vol); | |
4359 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && | |
4360 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & | |
4361 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) | |
4362 | return -EACCES; | |
4363 | } else | |
4364 | tcon->unix_ext = 0; /* server does not support them */ | |
4365 | ||
4366 | /* do not care if a following call succeed - informational */ | |
1981ebaa | 4367 | if (!tcon->pipe && server->ops->qfs_tcon) { |
0f060936 | 4368 | server->ops->qfs_tcon(*xid, tcon, cifs_sb); |
1981ebaa SF |
4369 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE) { |
4370 | if (tcon->fsDevInfo.DeviceCharacteristics & | |
52870d50 | 4371 | cpu_to_le32(FILE_READ_ONLY_DEVICE)) |
1981ebaa | 4372 | cifs_dbg(VFS, "mounted to read only share\n"); |
41e033fe SF |
4373 | else if ((cifs_sb->mnt_cifs_flags & |
4374 | CIFS_MOUNT_RW_CACHE) == 0) | |
1981ebaa | 4375 | cifs_dbg(VFS, "read only mount of RW share\n"); |
41e033fe | 4376 | /* no need to log a RW mount of a typical RW share */ |
1981ebaa SF |
4377 | } |
4378 | } | |
56c762eb PA |
4379 | |
4380 | cifs_sb->wsize = server->ops->negotiate_wsize(tcon, vol); | |
4381 | cifs_sb->rsize = server->ops->negotiate_rsize(tcon, vol); | |
4382 | ||
4383 | return 0; | |
4384 | } | |
4385 | ||
4386 | static int mount_setup_tlink(struct cifs_sb_info *cifs_sb, struct cifs_ses *ses, | |
4387 | struct cifs_tcon *tcon) | |
4388 | { | |
4389 | struct tcon_link *tlink; | |
4390 | ||
4391 | /* hang the tcon off of the superblock */ | |
4392 | tlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
4393 | if (tlink == NULL) | |
4394 | return -ENOMEM; | |
4395 | ||
4396 | tlink->tl_uid = ses->linux_uid; | |
4397 | tlink->tl_tcon = tcon; | |
4398 | tlink->tl_time = jiffies; | |
4399 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); | |
4400 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
4401 | ||
4402 | cifs_sb->master_tlink = tlink; | |
4403 | spin_lock(&cifs_sb->tlink_tree_lock); | |
4404 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); | |
4405 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
4406 | ||
4407 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, | |
4408 | TLINK_IDLE_EXPIRE); | |
4409 | return 0; | |
4410 | } | |
b9bce2e9 | 4411 | |
2d6d589d | 4412 | #ifdef CONFIG_CIFS_DFS_UPCALL |
6d3ea7e4 SF |
4413 | /* |
4414 | * cifs_build_path_to_root returns full path to root when we do not have an | |
4415 | * exiting connection (tcon) | |
4416 | */ | |
1bfe73c2 | 4417 | static char * |
b2a0fa15 | 4418 | build_unc_path_to_root(const struct smb_vol *vol, |
4a367dc0 | 4419 | const struct cifs_sb_info *cifs_sb, bool useppath) |
1bfe73c2 | 4420 | { |
b2a0fa15 | 4421 | char *full_path, *pos; |
4a367dc0 PA |
4422 | unsigned int pplen = useppath && vol->prepath ? |
4423 | strlen(vol->prepath) + 1 : 0; | |
b2a0fa15 | 4424 | unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); |
1bfe73c2 | 4425 | |
340625e6 RS |
4426 | if (unc_len > MAX_TREE_SIZE) |
4427 | return ERR_PTR(-EINVAL); | |
4428 | ||
b2a0fa15 | 4429 | full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); |
1bfe73c2 IM |
4430 | if (full_path == NULL) |
4431 | return ERR_PTR(-ENOMEM); | |
4432 | ||
340625e6 | 4433 | memcpy(full_path, vol->UNC, unc_len); |
b2a0fa15 JL |
4434 | pos = full_path + unc_len; |
4435 | ||
4436 | if (pplen) { | |
1fc29bac | 4437 | *pos = CIFS_DIR_SEP(cifs_sb); |
340625e6 | 4438 | memcpy(pos + 1, vol->prepath, pplen); |
b2a0fa15 JL |
4439 | pos += pplen; |
4440 | } | |
4441 | ||
4442 | *pos = '\0'; /* add trailing null */ | |
f87d39d9 | 4443 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
f96637be | 4444 | cifs_dbg(FYI, "%s: full_path=%s\n", __func__, full_path); |
1bfe73c2 IM |
4445 | return full_path; |
4446 | } | |
dd613945 | 4447 | |
1c780228 PA |
4448 | /** |
4449 | * expand_dfs_referral - Perform a dfs referral query and update the cifs_sb | |
4450 | * | |
dd613945 | 4451 | * |
046462ab SF |
4452 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
4453 | * to a string containing updated options for the submount. Otherwise it | |
4454 | * will be left untouched. | |
dd613945 SF |
4455 | * |
4456 | * Returns the rc from get_dfs_path to the caller, which can be used to | |
4457 | * determine whether there were referrals. | |
4458 | */ | |
4459 | static int | |
b669f33c | 4460 | expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses, |
dd613945 | 4461 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, |
046462ab | 4462 | int check_prefix) |
dd613945 SF |
4463 | { |
4464 | int rc; | |
1c780228 | 4465 | struct dfs_info3_param referral = {0}; |
dd613945 SF |
4466 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; |
4467 | ||
8393072b AA |
4468 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS) |
4469 | return -EREMOTE; | |
4470 | ||
4a367dc0 | 4471 | full_path = build_unc_path_to_root(volume_info, cifs_sb, true); |
dd613945 SF |
4472 | if (IS_ERR(full_path)) |
4473 | return PTR_ERR(full_path); | |
4474 | ||
4475 | /* For DFS paths, skip the first '\' of the UNC */ | |
4476 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; | |
4477 | ||
1c780228 PA |
4478 | rc = dfs_cache_find(xid, ses, cifs_sb->local_nls, cifs_remap(cifs_sb), |
4479 | ref_path, &referral, NULL); | |
4480 | if (!rc) { | |
dd613945 SF |
4481 | char *fake_devname = NULL; |
4482 | ||
4483 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, | |
1c780228 | 4484 | full_path + 1, &referral, |
dd613945 | 4485 | &fake_devname); |
1c780228 | 4486 | free_dfs_info_param(&referral); |
046462ab | 4487 | |
dd613945 SF |
4488 | if (IS_ERR(mdata)) { |
4489 | rc = PTR_ERR(mdata); | |
4490 | mdata = NULL; | |
b9bce2e9 | 4491 | } else { |
56c762eb | 4492 | cifs_cleanup_volume_info_contents(volume_info); |
b9bce2e9 | 4493 | rc = cifs_setup_volume_info(volume_info, mdata, |
1c780228 | 4494 | fake_devname, false); |
dd613945 | 4495 | } |
b9bce2e9 JL |
4496 | kfree(fake_devname); |
4497 | kfree(cifs_sb->mountdata); | |
046462ab | 4498 | cifs_sb->mountdata = mdata; |
dd613945 SF |
4499 | } |
4500 | kfree(full_path); | |
4501 | return rc; | |
4502 | } | |
4a367dc0 PA |
4503 | |
4504 | static inline int get_next_dfs_tgt(const char *path, | |
4505 | struct dfs_cache_tgt_list *tgt_list, | |
4506 | struct dfs_cache_tgt_iterator **tgt_it) | |
4507 | { | |
4508 | if (!*tgt_it) | |
4509 | *tgt_it = dfs_cache_get_tgt_iterator(tgt_list); | |
4510 | else | |
4511 | *tgt_it = dfs_cache_get_next_tgt(tgt_list, *tgt_it); | |
4512 | return !*tgt_it ? -EHOSTDOWN : 0; | |
4513 | } | |
4514 | ||
4515 | static int update_vol_info(const struct dfs_cache_tgt_iterator *tgt_it, | |
4516 | struct smb_vol *fake_vol, struct smb_vol *vol) | |
4517 | { | |
4518 | const char *tgt = dfs_cache_get_tgt_name(tgt_it); | |
4519 | int len = strlen(tgt) + 2; | |
4520 | char *new_unc; | |
4521 | ||
4522 | new_unc = kmalloc(len, GFP_KERNEL); | |
4523 | if (!new_unc) | |
4524 | return -ENOMEM; | |
74ea5f98 | 4525 | scnprintf(new_unc, len, "\\%s", tgt); |
4a367dc0 PA |
4526 | |
4527 | kfree(vol->UNC); | |
4528 | vol->UNC = new_unc; | |
4529 | ||
4530 | if (fake_vol->prepath) { | |
4531 | kfree(vol->prepath); | |
4532 | vol->prepath = fake_vol->prepath; | |
4533 | fake_vol->prepath = NULL; | |
4534 | } | |
4535 | memcpy(&vol->dstaddr, &fake_vol->dstaddr, sizeof(vol->dstaddr)); | |
4536 | ||
4537 | return 0; | |
4538 | } | |
4539 | ||
4540 | static int setup_dfs_tgt_conn(const char *path, | |
4541 | const struct dfs_cache_tgt_iterator *tgt_it, | |
4542 | struct cifs_sb_info *cifs_sb, | |
4543 | struct smb_vol *vol, | |
4544 | unsigned int *xid, | |
4545 | struct TCP_Server_Info **server, | |
4546 | struct cifs_ses **ses, | |
4547 | struct cifs_tcon **tcon) | |
4548 | { | |
4549 | int rc; | |
4550 | struct dfs_info3_param ref = {0}; | |
4551 | char *mdata = NULL, *fake_devname = NULL; | |
d0959b08 | 4552 | struct smb_vol fake_vol = {NULL}; |
4a367dc0 PA |
4553 | |
4554 | cifs_dbg(FYI, "%s: dfs path: %s\n", __func__, path); | |
4555 | ||
4556 | rc = dfs_cache_get_tgt_referral(path, tgt_it, &ref); | |
4557 | if (rc) | |
4558 | return rc; | |
4559 | ||
4560 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, path, &ref, | |
4561 | &fake_devname); | |
4562 | free_dfs_info_param(&ref); | |
4563 | ||
4564 | if (IS_ERR(mdata)) { | |
4565 | rc = PTR_ERR(mdata); | |
4566 | mdata = NULL; | |
4567 | } else { | |
4568 | cifs_dbg(FYI, "%s: fake_devname: %s\n", __func__, fake_devname); | |
4569 | rc = cifs_setup_volume_info(&fake_vol, mdata, fake_devname, | |
4570 | false); | |
4571 | } | |
4572 | kfree(mdata); | |
4573 | kfree(fake_devname); | |
4574 | ||
4575 | if (!rc) { | |
4576 | /* | |
4577 | * We use a 'fake_vol' here because we need pass it down to the | |
4578 | * mount_{get,put} functions to test connection against new DFS | |
4579 | * targets. | |
4580 | */ | |
4581 | mount_put_conns(cifs_sb, *xid, *server, *ses, *tcon); | |
4582 | rc = mount_get_conns(&fake_vol, cifs_sb, xid, server, ses, | |
4583 | tcon); | |
4584 | if (!rc) { | |
4585 | /* | |
4586 | * We were able to connect to new target server. | |
4587 | * Update current volume info with new target server. | |
4588 | */ | |
4589 | rc = update_vol_info(tgt_it, &fake_vol, vol); | |
4590 | } | |
4591 | } | |
4592 | cifs_cleanup_volume_info_contents(&fake_vol); | |
4593 | return rc; | |
4594 | } | |
4595 | ||
4596 | static int mount_do_dfs_failover(const char *path, | |
4597 | struct cifs_sb_info *cifs_sb, | |
4598 | struct smb_vol *vol, | |
4599 | struct cifs_ses *root_ses, | |
4600 | unsigned int *xid, | |
4601 | struct TCP_Server_Info **server, | |
4602 | struct cifs_ses **ses, | |
4603 | struct cifs_tcon **tcon) | |
4604 | { | |
4605 | int rc; | |
4606 | struct dfs_cache_tgt_list tgt_list; | |
4607 | struct dfs_cache_tgt_iterator *tgt_it = NULL; | |
4608 | ||
4609 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS) | |
4610 | return -EOPNOTSUPP; | |
4611 | ||
4612 | rc = dfs_cache_noreq_find(path, NULL, &tgt_list); | |
4613 | if (rc) | |
4614 | return rc; | |
4615 | ||
4616 | for (;;) { | |
4617 | /* Get next DFS target server - if any */ | |
4618 | rc = get_next_dfs_tgt(path, &tgt_list, &tgt_it); | |
4619 | if (rc) | |
4620 | break; | |
4621 | /* Connect to next DFS target */ | |
4622 | rc = setup_dfs_tgt_conn(path, tgt_it, cifs_sb, vol, xid, server, | |
4623 | ses, tcon); | |
4624 | if (!rc || rc == -EACCES || rc == -EOPNOTSUPP) | |
4625 | break; | |
4626 | } | |
4627 | if (!rc) { | |
4628 | /* | |
4629 | * Update DFS target hint in DFS referral cache with the target | |
4630 | * server we successfully reconnected to. | |
4631 | */ | |
4632 | rc = dfs_cache_update_tgthint(*xid, root_ses ? root_ses : *ses, | |
4633 | cifs_sb->local_nls, | |
4634 | cifs_remap(cifs_sb), path, | |
4635 | tgt_it); | |
4636 | } | |
4637 | dfs_cache_free_tgts(&tgt_list); | |
4638 | return rc; | |
4639 | } | |
2d6d589d | 4640 | #endif |
1bfe73c2 | 4641 | |
5072010c | 4642 | int |
04db79b0 | 4643 | cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
c7c137b9 | 4644 | const char *devname, bool is_smb3) |
1da177e4 | 4645 | { |
724d9f1c | 4646 | int rc = 0; |
1da177e4 | 4647 | |
c7c137b9 | 4648 | if (cifs_parse_mount_options(mount_data, devname, volume_info, is_smb3)) |
04db79b0 | 4649 | return -EINVAL; |
1da177e4 | 4650 | |
7586b765 | 4651 | if (volume_info->nullauth) { |
f96637be | 4652 | cifs_dbg(FYI, "Anonymous login\n"); |
04febabc JL |
4653 | kfree(volume_info->username); |
4654 | volume_info->username = NULL; | |
7586b765 | 4655 | } else if (volume_info->username) { |
1da177e4 | 4656 | /* BB fixme parse for domain name here */ |
f96637be | 4657 | cifs_dbg(FYI, "Username: %s\n", volume_info->username); |
1da177e4 | 4658 | } else { |
f96637be | 4659 | cifs_dbg(VFS, "No username specified\n"); |
50c2f753 SF |
4660 | /* In userspace mount helper we can get user name from alternate |
4661 | locations such as env variables and files on disk */ | |
04db79b0 | 4662 | return -EINVAL; |
1da177e4 LT |
4663 | } |
4664 | ||
1da177e4 | 4665 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 4666 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
4667 | /* load_nls_default cannot return null */ |
4668 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 4669 | } else { |
a5fc4ce0 JL |
4670 | volume_info->local_nls = load_nls(volume_info->iocharset); |
4671 | if (volume_info->local_nls == NULL) { | |
f96637be | 4672 | cifs_dbg(VFS, "CIFS mount error: iocharset %s not found\n", |
b6b38f70 | 4673 | volume_info->iocharset); |
04db79b0 | 4674 | return -ELIBACC; |
1da177e4 LT |
4675 | } |
4676 | } | |
724d9f1c | 4677 | |
724d9f1c PS |
4678 | return rc; |
4679 | } | |
4680 | ||
04db79b0 | 4681 | struct smb_vol * |
c7c137b9 | 4682 | cifs_get_volume_info(char *mount_data, const char *devname, bool is_smb3) |
04db79b0 JL |
4683 | { |
4684 | int rc; | |
4685 | struct smb_vol *volume_info; | |
4686 | ||
6ee9542a | 4687 | volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL); |
04db79b0 JL |
4688 | if (!volume_info) |
4689 | return ERR_PTR(-ENOMEM); | |
4690 | ||
c7c137b9 | 4691 | rc = cifs_setup_volume_info(volume_info, mount_data, devname, is_smb3); |
04db79b0 JL |
4692 | if (rc) { |
4693 | cifs_cleanup_volume_info(volume_info); | |
4694 | volume_info = ERR_PTR(rc); | |
4695 | } | |
4696 | ||
4697 | return volume_info; | |
4698 | } | |
4699 | ||
a6b5058f AA |
4700 | static int |
4701 | cifs_are_all_path_components_accessible(struct TCP_Server_Info *server, | |
4702 | unsigned int xid, | |
4703 | struct cifs_tcon *tcon, | |
4704 | struct cifs_sb_info *cifs_sb, | |
ce465bf9 RS |
4705 | char *full_path, |
4706 | int added_treename) | |
a6b5058f AA |
4707 | { |
4708 | int rc; | |
4709 | char *s; | |
4710 | char sep, tmp; | |
ce465bf9 | 4711 | int skip = added_treename ? 1 : 0; |
a6b5058f AA |
4712 | |
4713 | sep = CIFS_DIR_SEP(cifs_sb); | |
4714 | s = full_path; | |
4715 | ||
4716 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, ""); | |
4717 | while (rc == 0) { | |
4718 | /* skip separators */ | |
4719 | while (*s == sep) | |
4720 | s++; | |
4721 | if (!*s) | |
4722 | break; | |
4723 | /* next separator */ | |
4724 | while (*s && *s != sep) | |
4725 | s++; | |
ce465bf9 RS |
4726 | /* |
4727 | * if the treename is added, we then have to skip the first | |
4728 | * part within the separators | |
4729 | */ | |
4730 | if (skip) { | |
4731 | skip = 0; | |
4732 | continue; | |
4733 | } | |
a6b5058f AA |
4734 | /* |
4735 | * temporarily null-terminate the path at the end of | |
4736 | * the current component | |
4737 | */ | |
4738 | tmp = *s; | |
4739 | *s = 0; | |
4740 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, | |
4741 | full_path); | |
4742 | *s = tmp; | |
4743 | } | |
4744 | return rc; | |
4745 | } | |
4746 | ||
56c762eb PA |
4747 | /* |
4748 | * Check if path is remote (e.g. a DFS share). Return -EREMOTE if it is, | |
4749 | * otherwise 0. | |
4750 | */ | |
4751 | static int is_path_remote(struct cifs_sb_info *cifs_sb, struct smb_vol *vol, | |
4752 | const unsigned int xid, | |
4753 | struct TCP_Server_Info *server, | |
4754 | struct cifs_tcon *tcon) | |
724d9f1c | 4755 | { |
1daaae8f | 4756 | int rc; |
56c762eb | 4757 | char *full_path; |
dd854466 | 4758 | |
56c762eb PA |
4759 | if (!server->ops->is_path_accessible) |
4760 | return -EOPNOTSUPP; | |
724d9f1c | 4761 | |
56c762eb PA |
4762 | /* |
4763 | * cifs_build_path_to_root works only when we have a valid tcon | |
4764 | */ | |
4765 | full_path = cifs_build_path_to_root(vol, cifs_sb, tcon, | |
4766 | tcon->Flags & SMB_SHARE_IS_IN_DFS); | |
4767 | if (full_path == NULL) | |
4768 | return -ENOMEM; | |
724d9f1c | 4769 | |
56c762eb | 4770 | cifs_dbg(FYI, "%s: full_path: %s\n", __func__, full_path); |
1da177e4 | 4771 | |
56c762eb PA |
4772 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, |
4773 | full_path); | |
4774 | if (rc != 0 && rc != -EREMOTE) { | |
4775 | kfree(full_path); | |
4776 | return rc; | |
b618f001 | 4777 | } |
592fafe6 | 4778 | |
56c762eb PA |
4779 | if (rc != -EREMOTE) { |
4780 | rc = cifs_are_all_path_components_accessible(server, xid, tcon, | |
ce465bf9 | 4781 | cifs_sb, full_path, tcon->Flags & SMB_SHARE_IS_IN_DFS); |
56c762eb | 4782 | if (rc != 0) { |
afe6f653 | 4783 | cifs_server_dbg(VFS, "cannot query dirs between root and final path, " |
56c762eb PA |
4784 | "enabling CIFS_MOUNT_USE_PREFIX_PATH\n"); |
4785 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH; | |
4786 | rc = 0; | |
4787 | } | |
d00c28de | 4788 | } |
1bfe73c2 | 4789 | |
56c762eb PA |
4790 | kfree(full_path); |
4791 | return rc; | |
4792 | } | |
ce558b0e | 4793 | |
56c762eb | 4794 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5bb30a4d PAS |
4795 | static inline void set_root_tcon(struct cifs_sb_info *cifs_sb, |
4796 | struct cifs_tcon *tcon, | |
4797 | struct cifs_tcon **root) | |
4798 | { | |
4799 | spin_lock(&cifs_tcp_ses_lock); | |
4800 | tcon->tc_count++; | |
4801 | tcon->remap = cifs_remap(cifs_sb); | |
4802 | spin_unlock(&cifs_tcp_ses_lock); | |
4803 | *root = tcon; | |
4804 | } | |
4805 | ||
56c762eb PA |
4806 | int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *vol) |
4807 | { | |
4808 | int rc = 0; | |
4809 | unsigned int xid; | |
4810 | struct cifs_ses *ses; | |
4a367dc0 | 4811 | struct cifs_tcon *root_tcon = NULL; |
56c762eb PA |
4812 | struct cifs_tcon *tcon = NULL; |
4813 | struct TCP_Server_Info *server; | |
4a367dc0 | 4814 | char *root_path = NULL, *full_path = NULL; |
5072010c | 4815 | char *old_mountdata, *origin_mountdata = NULL; |
56c762eb | 4816 | int count; |
c18c842b | 4817 | |
56c762eb PA |
4818 | rc = mount_get_conns(vol, cifs_sb, &xid, &server, &ses, &tcon); |
4819 | if (!rc && tcon) { | |
4a367dc0 PA |
4820 | /* If not a standalone DFS root, then check if path is remote */ |
4821 | rc = dfs_cache_find(xid, ses, cifs_sb->local_nls, | |
4822 | cifs_remap(cifs_sb), vol->UNC + 1, NULL, | |
4823 | NULL); | |
4824 | if (rc) { | |
4825 | rc = is_path_remote(cifs_sb, vol, xid, server, tcon); | |
4826 | if (!rc) | |
4827 | goto out; | |
4828 | if (rc != -EREMOTE) | |
4829 | goto error; | |
4830 | } | |
56c762eb | 4831 | } |
4a367dc0 PA |
4832 | /* |
4833 | * If first DFS target server went offline and we failed to connect it, | |
4834 | * server and ses pointers are NULL at this point, though we still have | |
4835 | * chance to get a cached DFS referral in expand_dfs_referral() and | |
4836 | * retry next target available in it. | |
4837 | * | |
4838 | * If a NULL ses ptr is passed to dfs_cache_find(), a lookup will be | |
4839 | * performed against DFS path and *no* requests will be sent to server | |
4840 | * for any new DFS referrals. Hence it's safe to skip checking whether | |
4841 | * server or ses ptr is NULL. | |
4842 | */ | |
4843 | if (rc == -EACCES || rc == -EOPNOTSUPP) | |
56c762eb | 4844 | goto error; |
6848b733 | 4845 | |
4a367dc0 PA |
4846 | root_path = build_unc_path_to_root(vol, cifs_sb, false); |
4847 | if (IS_ERR(root_path)) { | |
4848 | rc = PTR_ERR(root_path); | |
4849 | root_path = NULL; | |
4850 | goto error; | |
4851 | } | |
f7910cbd | 4852 | |
93d5cb51 PA |
4853 | full_path = build_unc_path_to_root(vol, cifs_sb, true); |
4854 | if (IS_ERR(full_path)) { | |
4855 | rc = PTR_ERR(full_path); | |
4856 | full_path = NULL; | |
4857 | goto error; | |
4858 | } | |
c1508ca2 SF |
4859 | /* |
4860 | * Perform an unconditional check for whether there are DFS | |
4861 | * referrals for this path without prefix, to provide support | |
4862 | * for DFS referrals from w2k8 servers which don't seem to respond | |
4863 | * with PATH_NOT_COVERED to requests that include the prefix. | |
4864 | * Chase the referral if found, otherwise continue normally. | |
4865 | */ | |
56c762eb PA |
4866 | old_mountdata = cifs_sb->mountdata; |
4867 | (void)expand_dfs_referral(xid, ses, vol, cifs_sb, false); | |
4868 | ||
4869 | if (cifs_sb->mountdata == NULL) { | |
4870 | rc = -ENOENT; | |
4871 | goto error; | |
c1508ca2 | 4872 | } |
c1508ca2 | 4873 | |
5072010c PAS |
4874 | /* Save DFS root volume information for DFS refresh worker */ |
4875 | origin_mountdata = kstrndup(cifs_sb->mountdata, | |
4876 | strlen(cifs_sb->mountdata), GFP_KERNEL); | |
4877 | if (!origin_mountdata) { | |
4878 | rc = -ENOMEM; | |
4879 | goto error; | |
4880 | } | |
4881 | ||
56c762eb PA |
4882 | if (cifs_sb->mountdata != old_mountdata) { |
4883 | /* If we were redirected, reconnect to new target server */ | |
4884 | mount_put_conns(cifs_sb, xid, server, ses, tcon); | |
4885 | rc = mount_get_conns(vol, cifs_sb, &xid, &server, &ses, &tcon); | |
4886 | } | |
4887 | if (rc) { | |
4888 | if (rc == -EACCES || rc == -EOPNOTSUPP) | |
4889 | goto error; | |
4a367dc0 PA |
4890 | /* Perform DFS failover to any other DFS targets */ |
4891 | rc = mount_do_dfs_failover(root_path + 1, cifs_sb, vol, NULL, | |
4892 | &xid, &server, &ses, &tcon); | |
4893 | if (rc) | |
4894 | goto error; | |
56c762eb PA |
4895 | } |
4896 | ||
4a367dc0 PA |
4897 | kfree(root_path); |
4898 | root_path = build_unc_path_to_root(vol, cifs_sb, false); | |
4899 | if (IS_ERR(root_path)) { | |
4900 | rc = PTR_ERR(root_path); | |
4901 | root_path = NULL; | |
4902 | goto error; | |
4903 | } | |
4904 | /* Cache out resolved root server */ | |
4905 | (void)dfs_cache_find(xid, ses, cifs_sb->local_nls, cifs_remap(cifs_sb), | |
4906 | root_path + 1, NULL, NULL); | |
5bb30a4d | 4907 | kfree(root_path); |
4a367dc0 | 4908 | root_path = NULL; |
4a367dc0 | 4909 | |
5bb30a4d | 4910 | set_root_tcon(cifs_sb, tcon, &root_tcon); |
4a367dc0 | 4911 | |
56c762eb PA |
4912 | for (count = 1; ;) { |
4913 | if (!rc && tcon) { | |
4914 | rc = is_path_remote(cifs_sb, vol, xid, server, tcon); | |
4915 | if (!rc || rc != -EREMOTE) | |
4916 | break; | |
68889f26 | 4917 | } |
6d3ea7e4 | 4918 | /* |
56c762eb PA |
4919 | * BB: when we implement proper loop detection, |
4920 | * we will remove this check. But now we need it | |
4921 | * to prevent an indefinite loop if 'DFS tree' is | |
4922 | * misconfigured (i.e. has loops). | |
6d3ea7e4 | 4923 | */ |
56c762eb | 4924 | if (count++ > MAX_NESTED_LINKS) { |
5c2503a8 | 4925 | rc = -ELOOP; |
56c762eb | 4926 | break; |
5c2503a8 | 4927 | } |
1bfe73c2 | 4928 | |
4a367dc0 PA |
4929 | kfree(full_path); |
4930 | full_path = build_unc_path_to_root(vol, cifs_sb, true); | |
4931 | if (IS_ERR(full_path)) { | |
4932 | rc = PTR_ERR(full_path); | |
4933 | full_path = NULL; | |
4934 | break; | |
4935 | } | |
4936 | ||
56c762eb | 4937 | old_mountdata = cifs_sb->mountdata; |
4a367dc0 | 4938 | rc = expand_dfs_referral(xid, root_tcon->ses, vol, cifs_sb, |
56c762eb PA |
4939 | true); |
4940 | if (rc) | |
4941 | break; | |
7b91e266 | 4942 | |
56c762eb PA |
4943 | if (cifs_sb->mountdata != old_mountdata) { |
4944 | mount_put_conns(cifs_sb, xid, server, ses, tcon); | |
4945 | rc = mount_get_conns(vol, cifs_sb, &xid, &server, &ses, | |
4946 | &tcon); | |
5bb30a4d PAS |
4947 | /* |
4948 | * Ensure that DFS referrals go through new root server. | |
4949 | */ | |
4950 | if (!rc && tcon && | |
4951 | (tcon->share_flags & (SHI1005_FLAGS_DFS | | |
4952 | SHI1005_FLAGS_DFS_ROOT))) { | |
4953 | cifs_put_tcon(root_tcon); | |
4954 | set_root_tcon(cifs_sb, tcon, &root_tcon); | |
4955 | } | |
56c762eb PA |
4956 | } |
4957 | if (rc) { | |
4a367dc0 PA |
4958 | if (rc == -EACCES || rc == -EOPNOTSUPP) |
4959 | break; | |
4960 | /* Perform DFS failover to any other DFS targets */ | |
4961 | rc = mount_do_dfs_failover(full_path + 1, cifs_sb, vol, | |
4962 | root_tcon->ses, &xid, | |
4963 | &server, &ses, &tcon); | |
56c762eb PA |
4964 | if (rc == -EACCES || rc == -EOPNOTSUPP || !server || |
4965 | !ses) | |
4966 | goto error; | |
1bfe73c2 IM |
4967 | } |
4968 | } | |
4a367dc0 | 4969 | cifs_put_tcon(root_tcon); |
1bfe73c2 | 4970 | |
9d002df4 | 4971 | if (rc) |
56c762eb | 4972 | goto error; |
9d002df4 | 4973 | |
93d5cb51 PA |
4974 | spin_lock(&cifs_tcp_ses_lock); |
4975 | if (!tcon->dfs_path) { | |
4976 | /* Save full path in new tcon to do failover when reconnecting tcons */ | |
4977 | tcon->dfs_path = full_path; | |
4978 | full_path = NULL; | |
4979 | tcon->remap = cifs_remap(cifs_sb); | |
4980 | } | |
4981 | cifs_sb->origin_fullpath = kstrndup(tcon->dfs_path, | |
2f0a6174 Y |
4982 | strlen(tcon->dfs_path), |
4983 | GFP_ATOMIC); | |
93d5cb51 PA |
4984 | if (!cifs_sb->origin_fullpath) { |
4985 | spin_unlock(&cifs_tcp_ses_lock); | |
4986 | rc = -ENOMEM; | |
4987 | goto error; | |
4988 | } | |
4989 | spin_unlock(&cifs_tcp_ses_lock); | |
4990 | ||
5072010c | 4991 | rc = dfs_cache_add_vol(origin_mountdata, vol, cifs_sb->origin_fullpath); |
e511d317 PA |
4992 | if (rc) { |
4993 | kfree(cifs_sb->origin_fullpath); | |
4994 | goto error; | |
4995 | } | |
5fc7fcd0 AA |
4996 | /* |
4997 | * After reconnecting to a different server, unique ids won't | |
4998 | * match anymore, so we disable serverino. This prevents | |
4999 | * dentry revalidation to think the dentry are stale (ESTALE). | |
5000 | */ | |
5001 | cifs_autodisable_serverino(cifs_sb); | |
56c762eb PA |
5002 | out: |
5003 | free_xid(xid); | |
d70e9fa5 | 5004 | cifs_try_adding_channels(ses); |
56c762eb | 5005 | return mount_setup_tlink(cifs_sb, ses, tcon); |
9d002df4 | 5006 | |
56c762eb | 5007 | error: |
4a367dc0 PA |
5008 | kfree(full_path); |
5009 | kfree(root_path); | |
5072010c | 5010 | kfree(origin_mountdata); |
56c762eb PA |
5011 | mount_put_conns(cifs_sb, xid, server, ses, tcon); |
5012 | return rc; | |
5013 | } | |
5014 | #else | |
5015 | int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *vol) | |
5016 | { | |
5017 | int rc = 0; | |
5018 | unsigned int xid; | |
5019 | struct cifs_ses *ses; | |
5020 | struct cifs_tcon *tcon; | |
5021 | struct TCP_Server_Info *server; | |
413e661c | 5022 | |
56c762eb PA |
5023 | rc = mount_get_conns(vol, cifs_sb, &xid, &server, &ses, &tcon); |
5024 | if (rc) | |
5025 | goto error; | |
2de970ff | 5026 | |
56c762eb PA |
5027 | if (tcon) { |
5028 | rc = is_path_remote(cifs_sb, vol, xid, server, tcon); | |
5029 | if (rc == -EREMOTE) | |
5030 | rc = -EOPNOTSUPP; | |
5031 | if (rc) | |
5032 | goto error; | |
1bfe73c2 IM |
5033 | } |
5034 | ||
6d5786a3 | 5035 | free_xid(xid); |
56c762eb PA |
5036 | |
5037 | return mount_setup_tlink(cifs_sb, ses, tcon); | |
5038 | ||
5039 | error: | |
5040 | mount_put_conns(cifs_sb, xid, server, ses, tcon); | |
1da177e4 LT |
5041 | return rc; |
5042 | } | |
56c762eb | 5043 | #endif |
1da177e4 | 5044 | |
8d1bca32 | 5045 | /* |
b327a717 | 5046 | * Issue a TREE_CONNECT request. |
8d1bca32 | 5047 | */ |
1da177e4 | 5048 | int |
2e6e02ab | 5049 | CIFSTCon(const unsigned int xid, struct cifs_ses *ses, |
96daf2b0 | 5050 | const char *tree, struct cifs_tcon *tcon, |
1da177e4 LT |
5051 | const struct nls_table *nls_codepage) |
5052 | { | |
5053 | struct smb_hdr *smb_buffer; | |
5054 | struct smb_hdr *smb_buffer_response; | |
5055 | TCONX_REQ *pSMB; | |
5056 | TCONX_RSP *pSMBr; | |
5057 | unsigned char *bcc_ptr; | |
5058 | int rc = 0; | |
690c522f JL |
5059 | int length; |
5060 | __u16 bytes_left, count; | |
1da177e4 LT |
5061 | |
5062 | if (ses == NULL) | |
5063 | return -EIO; | |
5064 | ||
5065 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 5066 | if (smb_buffer == NULL) |
1da177e4 | 5067 | return -ENOMEM; |
ca43e3be | 5068 | |
1da177e4 LT |
5069 | smb_buffer_response = smb_buffer; |
5070 | ||
5071 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
5072 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 | 5073 | |
88257360 | 5074 | smb_buffer->Mid = get_next_mid(ses->server); |
1da177e4 LT |
5075 | smb_buffer->Uid = ses->Suid; |
5076 | pSMB = (TCONX_REQ *) smb_buffer; | |
5077 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
5078 | ||
5079 | pSMB->AndXCommand = 0xFF; | |
5080 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 5081 | bcc_ptr = &pSMB->Password[0]; |
b327a717 | 5082 | if (tcon->pipe || (ses->server->sec_mode & SECMODE_USER)) { |
eeac8047 | 5083 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 5084 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 5085 | bcc_ptr++; /* skip password */ |
7c7b25bc | 5086 | /* already aligned so no need to do it below */ |
eeac8047 | 5087 | } else { |
540b2e37 | 5088 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
eeac8047 SF |
5089 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
5090 | specified as required (when that support is added to | |
5091 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 5092 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
5093 | by Samba (not sure whether other servers allow |
5094 | NTLMv2 password here) */ | |
7c7b25bc | 5095 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 5096 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
3f618223 | 5097 | (ses->sectype == LANMAN)) |
d3ba50b1 | 5098 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
96daf2b0 | 5099 | ses->server->sec_mode & |
4e53a3fb JL |
5100 | SECMODE_PW_ENCRYPT ? true : false, |
5101 | bcc_ptr); | |
7c7b25bc SF |
5102 | else |
5103 | #endif /* CIFS_WEAK_PW_HASH */ | |
ee2c9258 | 5104 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
9ef5992e | 5105 | bcc_ptr, nls_codepage); |
f3a31a2b SF |
5106 | if (rc) { |
5107 | cifs_dbg(FYI, "%s Can't generate NTLM rsp. Error: %d\n", | |
5108 | __func__, rc); | |
5109 | cifs_buf_release(smb_buffer); | |
5110 | return rc; | |
5111 | } | |
eeac8047 | 5112 | |
540b2e37 | 5113 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
fb8c4b14 | 5114 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
5115 | /* must align unicode strings */ |
5116 | *bcc_ptr = 0; /* null byte password */ | |
5117 | bcc_ptr++; | |
5118 | } | |
eeac8047 | 5119 | } |
1da177e4 | 5120 | |
38d77c50 | 5121 | if (ses->server->sign) |
1da177e4 LT |
5122 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
5123 | ||
5124 | if (ses->capabilities & CAP_STATUS32) { | |
5125 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
5126 | } | |
5127 | if (ses->capabilities & CAP_DFS) { | |
5128 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
5129 | } | |
5130 | if (ses->capabilities & CAP_UNICODE) { | |
5131 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
5132 | length = | |
acbbb76a | 5133 | cifs_strtoUTF16((__le16 *) bcc_ptr, tree, |
50c2f753 | 5134 | 6 /* max utf8 char length in bytes */ * |
a878fb22 SF |
5135 | (/* server len*/ + 256 /* share len */), nls_codepage); |
5136 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
5137 | bcc_ptr += 2; /* skip trailing null */ |
5138 | } else { /* ASCII */ | |
1da177e4 LT |
5139 | strcpy(bcc_ptr, tree); |
5140 | bcc_ptr += strlen(tree) + 1; | |
5141 | } | |
5142 | strcpy(bcc_ptr, "?????"); | |
5143 | bcc_ptr += strlen("?????"); | |
5144 | bcc_ptr += 1; | |
5145 | count = bcc_ptr - &pSMB->Password[0]; | |
be8e3b00 SF |
5146 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
5147 | pSMB->hdr.smb_buf_length) + count); | |
1da177e4 LT |
5148 | pSMB->ByteCount = cpu_to_le16(count); |
5149 | ||
133672ef | 5150 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
7749981e | 5151 | 0); |
1da177e4 | 5152 | |
1da177e4 | 5153 | /* above now done in SendReceive */ |
b327a717 | 5154 | if (rc == 0) { |
0e0d2cf3 SF |
5155 | bool is_unicode; |
5156 | ||
1da177e4 | 5157 | tcon->tidStatus = CifsGood; |
3b795210 | 5158 | tcon->need_reconnect = false; |
1da177e4 LT |
5159 | tcon->tid = smb_buffer_response->Tid; |
5160 | bcc_ptr = pByteArea(smb_buffer_response); | |
690c522f | 5161 | bytes_left = get_bcc(smb_buffer_response); |
cc20c031 | 5162 | length = strnlen(bcc_ptr, bytes_left - 2); |
0e0d2cf3 SF |
5163 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
5164 | is_unicode = true; | |
5165 | else | |
5166 | is_unicode = false; | |
5167 | ||
cc20c031 | 5168 | |
50c2f753 | 5169 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
5170 | if (length == 3) { |
5171 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
5172 | (bcc_ptr[2] == 'C')) { | |
f96637be | 5173 | cifs_dbg(FYI, "IPC connection\n"); |
b327a717 AA |
5174 | tcon->ipc = true; |
5175 | tcon->pipe = true; | |
7f8ed420 SF |
5176 | } |
5177 | } else if (length == 2) { | |
5178 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
5179 | /* the most common case */ | |
f96637be | 5180 | cifs_dbg(FYI, "disk share connection\n"); |
7f8ed420 SF |
5181 | } |
5182 | } | |
50c2f753 | 5183 | bcc_ptr += length + 1; |
cc20c031 | 5184 | bytes_left -= (length + 1); |
46b51d08 | 5185 | strlcpy(tcon->treeName, tree, sizeof(tcon->treeName)); |
cc20c031 JL |
5186 | |
5187 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 5188 | kfree(tcon->nativeFileSystem); |
acbbb76a | 5189 | tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr, |
0e0d2cf3 | 5190 | bytes_left, is_unicode, |
cc20c031 JL |
5191 | nls_codepage); |
5192 | ||
f96637be | 5193 | cifs_dbg(FYI, "nativeFileSystem=%s\n", tcon->nativeFileSystem); |
cc20c031 | 5194 | |
fb8c4b14 | 5195 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
5196 | (smb_buffer_response->WordCount == 7)) |
5197 | /* field is in same location */ | |
3979877e SF |
5198 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
5199 | else | |
5200 | tcon->Flags = 0; | |
f96637be | 5201 | cifs_dbg(FYI, "Tcon flags: 0x%x\n", tcon->Flags); |
1da177e4 LT |
5202 | } |
5203 | ||
a8a11d39 | 5204 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
5205 | return rc; |
5206 | } | |
5207 | ||
2e32cf5e AV |
5208 | static void delayed_free(struct rcu_head *p) |
5209 | { | |
5210 | struct cifs_sb_info *sbi = container_of(p, struct cifs_sb_info, rcu); | |
5211 | unload_nls(sbi->local_nls); | |
5212 | kfree(sbi); | |
5213 | } | |
5214 | ||
2a9b9951 AV |
5215 | void |
5216 | cifs_umount(struct cifs_sb_info *cifs_sb) | |
1da177e4 | 5217 | { |
b647c35f JL |
5218 | struct rb_root *root = &cifs_sb->tlink_tree; |
5219 | struct rb_node *node; | |
5220 | struct tcon_link *tlink; | |
9d002df4 | 5221 | |
2de970ff JL |
5222 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
5223 | ||
b647c35f JL |
5224 | spin_lock(&cifs_sb->tlink_tree_lock); |
5225 | while ((node = rb_first(root))) { | |
5226 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
5227 | cifs_get_tlink(tlink); | |
5228 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
5229 | rb_erase(node, root); | |
1da177e4 | 5230 | |
b647c35f JL |
5231 | spin_unlock(&cifs_sb->tlink_tree_lock); |
5232 | cifs_put_tlink(tlink); | |
5233 | spin_lock(&cifs_sb->tlink_tree_lock); | |
5234 | } | |
5235 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
50c2f753 | 5236 | |
d757d71b | 5237 | kfree(cifs_sb->mountdata); |
a6b5058f | 5238 | kfree(cifs_sb->prepath); |
93d5cb51 | 5239 | #ifdef CONFIG_CIFS_DFS_UPCALL |
e511d317 | 5240 | dfs_cache_del_vol(cifs_sb->origin_fullpath); |
93d5cb51 PA |
5241 | kfree(cifs_sb->origin_fullpath); |
5242 | #endif | |
2e32cf5e | 5243 | call_rcu(&cifs_sb->rcu, delayed_free); |
50c2f753 | 5244 | } |
1da177e4 | 5245 | |
286170aa PS |
5246 | int |
5247 | cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses) | |
1da177e4 LT |
5248 | { |
5249 | int rc = 0; | |
f6a6bf7c | 5250 | struct TCP_Server_Info *server = cifs_ses_server(ses); |
1da177e4 | 5251 | |
286170aa PS |
5252 | if (!server->ops->need_neg || !server->ops->negotiate) |
5253 | return -ENOSYS; | |
5254 | ||
198b5682 | 5255 | /* only send once per connect */ |
286170aa | 5256 | if (!server->ops->need_neg(server)) |
198b5682 JL |
5257 | return 0; |
5258 | ||
286170aa | 5259 | rc = server->ops->negotiate(xid, ses); |
198b5682 JL |
5260 | if (rc == 0) { |
5261 | spin_lock(&GlobalMid_Lock); | |
7fdbaa1b | 5262 | if (server->tcpStatus == CifsNeedNegotiate) |
198b5682 JL |
5263 | server->tcpStatus = CifsGood; |
5264 | else | |
5265 | rc = -EHOSTDOWN; | |
5266 | spin_unlock(&GlobalMid_Lock); | |
198b5682 JL |
5267 | } |
5268 | ||
5269 | return rc; | |
5270 | } | |
5271 | ||
58c45c58 PS |
5272 | int |
5273 | cifs_setup_session(const unsigned int xid, struct cifs_ses *ses, | |
5274 | struct nls_table *nls_info) | |
198b5682 | 5275 | { |
58c45c58 | 5276 | int rc = -ENOSYS; |
f6a6bf7c | 5277 | struct TCP_Server_Info *server = cifs_ses_server(ses); |
26b994fa | 5278 | |
d70e9fa5 AA |
5279 | if (!ses->binding) { |
5280 | ses->capabilities = server->capabilities; | |
5281 | if (linuxExtEnabled == 0) | |
5282 | ses->capabilities &= (~server->vals->cap_unix); | |
5283 | ||
5284 | if (ses->auth_key.response) { | |
5285 | cifs_dbg(FYI, "Free previous auth_key.response = %p\n", | |
5286 | ses->auth_key.response); | |
5287 | kfree(ses->auth_key.response); | |
5288 | ses->auth_key.response = NULL; | |
5289 | ses->auth_key.len = 0; | |
5290 | } | |
5291 | } | |
20418acd | 5292 | |
f96637be | 5293 | cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n", |
96daf2b0 | 5294 | server->sec_mode, server->capabilities, server->timeAdj); |
cb7691b6 | 5295 | |
58c45c58 PS |
5296 | if (server->ops->sess_setup) |
5297 | rc = server->ops->sess_setup(xid, ses, nls_info); | |
5298 | ||
d4e63bd6 | 5299 | if (rc) |
afe6f653 | 5300 | cifs_server_dbg(VFS, "Send error in SessSetup = %d\n", rc); |
21e73393 | 5301 | |
1da177e4 LT |
5302 | return rc; |
5303 | } | |
5304 | ||
8a8798a5 JL |
5305 | static int |
5306 | cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses) | |
5307 | { | |
3f618223 JL |
5308 | vol->sectype = ses->sectype; |
5309 | ||
5310 | /* krb5 is special, since we don't need username or pw */ | |
5311 | if (vol->sectype == Kerberos) | |
8a8798a5 | 5312 | return 0; |
8a8798a5 JL |
5313 | |
5314 | return cifs_set_cifscreds(vol, ses); | |
5315 | } | |
5316 | ||
96daf2b0 | 5317 | static struct cifs_tcon * |
6d4a0832 | 5318 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid) |
9d002df4 | 5319 | { |
8a8798a5 | 5320 | int rc; |
96daf2b0 SF |
5321 | struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); |
5322 | struct cifs_ses *ses; | |
5323 | struct cifs_tcon *tcon = NULL; | |
9d002df4 | 5324 | struct smb_vol *vol_info; |
9d002df4 JL |
5325 | |
5326 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); | |
803ab977 DC |
5327 | if (vol_info == NULL) |
5328 | return ERR_PTR(-ENOMEM); | |
9d002df4 | 5329 | |
9d002df4 JL |
5330 | vol_info->local_nls = cifs_sb->local_nls; |
5331 | vol_info->linux_uid = fsuid; | |
5332 | vol_info->cred_uid = fsuid; | |
5333 | vol_info->UNC = master_tcon->treeName; | |
5334 | vol_info->retry = master_tcon->retry; | |
5335 | vol_info->nocase = master_tcon->nocase; | |
3d4ef9a1 | 5336 | vol_info->nohandlecache = master_tcon->nohandlecache; |
9d002df4 JL |
5337 | vol_info->local_lease = master_tcon->local_lease; |
5338 | vol_info->no_linux_ext = !master_tcon->unix_ext; | |
28e11bd8 JL |
5339 | vol_info->sectype = master_tcon->ses->sectype; |
5340 | vol_info->sign = master_tcon->ses->sign; | |
9d002df4 | 5341 | |
8a8798a5 JL |
5342 | rc = cifs_set_vol_auth(vol_info, master_tcon->ses); |
5343 | if (rc) { | |
5344 | tcon = ERR_PTR(rc); | |
5345 | goto out; | |
5346 | } | |
9d002df4 JL |
5347 | |
5348 | /* get a reference for the same TCP session */ | |
3f9bcca7 | 5349 | spin_lock(&cifs_tcp_ses_lock); |
9d002df4 | 5350 | ++master_tcon->ses->server->srv_count; |
3f9bcca7 | 5351 | spin_unlock(&cifs_tcp_ses_lock); |
9d002df4 JL |
5352 | |
5353 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); | |
5354 | if (IS_ERR(ses)) { | |
96daf2b0 | 5355 | tcon = (struct cifs_tcon *)ses; |
53e0e11e | 5356 | cifs_put_tcp_session(master_tcon->ses->server, 0); |
9d002df4 JL |
5357 | goto out; |
5358 | } | |
5359 | ||
5360 | tcon = cifs_get_tcon(ses, vol_info); | |
5361 | if (IS_ERR(tcon)) { | |
5362 | cifs_put_smb_ses(ses); | |
5363 | goto out; | |
5364 | } | |
5365 | ||
ce558b0e SF |
5366 | /* if new SMB3.11 POSIX extensions are supported do not remap / and \ */ |
5367 | if (tcon->posix_extensions) | |
5368 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_POSIX_PATHS; | |
0fdfef9a | 5369 | |
29e20f9c | 5370 | if (cap_unix(ses)) |
9d002df4 | 5371 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); |
b326614e | 5372 | |
9d002df4 | 5373 | out: |
8a8798a5 | 5374 | kfree(vol_info->username); |
97f4b727 | 5375 | kzfree(vol_info->password); |
9d002df4 JL |
5376 | kfree(vol_info); |
5377 | ||
5378 | return tcon; | |
5379 | } | |
5380 | ||
96daf2b0 | 5381 | struct cifs_tcon * |
9d002df4 JL |
5382 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) |
5383 | { | |
5384 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); | |
5385 | } | |
5386 | ||
b647c35f JL |
5387 | /* find and return a tlink with given uid */ |
5388 | static struct tcon_link * | |
6d4a0832 | 5389 | tlink_rb_search(struct rb_root *root, kuid_t uid) |
b647c35f JL |
5390 | { |
5391 | struct rb_node *node = root->rb_node; | |
5392 | struct tcon_link *tlink; | |
5393 | ||
5394 | while (node) { | |
5395 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); | |
5396 | ||
6d4a0832 | 5397 | if (uid_gt(tlink->tl_uid, uid)) |
b647c35f | 5398 | node = node->rb_left; |
6d4a0832 | 5399 | else if (uid_lt(tlink->tl_uid, uid)) |
b647c35f JL |
5400 | node = node->rb_right; |
5401 | else | |
5402 | return tlink; | |
5403 | } | |
5404 | return NULL; | |
5405 | } | |
5406 | ||
5407 | /* insert a tcon_link into the tree */ | |
5408 | static void | |
5409 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) | |
5410 | { | |
5411 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
5412 | struct tcon_link *tlink; | |
5413 | ||
5414 | while (*new) { | |
5415 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); | |
5416 | parent = *new; | |
5417 | ||
6d4a0832 | 5418 | if (uid_gt(tlink->tl_uid, new_tlink->tl_uid)) |
b647c35f JL |
5419 | new = &((*new)->rb_left); |
5420 | else | |
5421 | new = &((*new)->rb_right); | |
5422 | } | |
5423 | ||
5424 | rb_link_node(&new_tlink->tl_rbnode, parent, new); | |
5425 | rb_insert_color(&new_tlink->tl_rbnode, root); | |
5426 | } | |
5427 | ||
9d002df4 JL |
5428 | /* |
5429 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the | |
5430 | * current task. | |
5431 | * | |
5432 | * If the superblock doesn't refer to a multiuser mount, then just return | |
5433 | * the master tcon for the mount. | |
5434 | * | |
6ef933a3 | 5435 | * First, search the rbtree for an existing tcon for this fsuid. If one |
9d002df4 JL |
5436 | * exists, then check to see if it's pending construction. If it is then wait |
5437 | * for construction to complete. Once it's no longer pending, check to see if | |
5438 | * it failed and either return an error or retry construction, depending on | |
5439 | * the timeout. | |
5440 | * | |
5441 | * If one doesn't exist then insert a new tcon_link struct into the tree and | |
5442 | * try to construct a new one. | |
5443 | */ | |
5444 | struct tcon_link * | |
5445 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) | |
5446 | { | |
5447 | int ret; | |
6d4a0832 | 5448 | kuid_t fsuid = current_fsuid(); |
9d002df4 JL |
5449 | struct tcon_link *tlink, *newtlink; |
5450 | ||
5451 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) | |
5452 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); | |
5453 | ||
5454 | spin_lock(&cifs_sb->tlink_tree_lock); | |
b647c35f | 5455 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
5456 | if (tlink) |
5457 | cifs_get_tlink(tlink); | |
5458 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
5459 | ||
5460 | if (tlink == NULL) { | |
5461 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); | |
5462 | if (newtlink == NULL) | |
5463 | return ERR_PTR(-ENOMEM); | |
b647c35f | 5464 | newtlink->tl_uid = fsuid; |
9d002df4 JL |
5465 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
5466 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); | |
5467 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); | |
5468 | cifs_get_tlink(newtlink); | |
5469 | ||
9d002df4 JL |
5470 | spin_lock(&cifs_sb->tlink_tree_lock); |
5471 | /* was one inserted after previous search? */ | |
b647c35f | 5472 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
9d002df4 JL |
5473 | if (tlink) { |
5474 | cifs_get_tlink(tlink); | |
5475 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
5476 | kfree(newtlink); |
5477 | goto wait_for_construction; | |
5478 | } | |
9d002df4 | 5479 | tlink = newtlink; |
b647c35f JL |
5480 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
5481 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
9d002df4 JL |
5482 | } else { |
5483 | wait_for_construction: | |
5484 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, | |
9d002df4 JL |
5485 | TASK_INTERRUPTIBLE); |
5486 | if (ret) { | |
5487 | cifs_put_tlink(tlink); | |
74316201 | 5488 | return ERR_PTR(-ERESTARTSYS); |
9d002df4 JL |
5489 | } |
5490 | ||
5491 | /* if it's good, return it */ | |
5492 | if (!IS_ERR(tlink->tl_tcon)) | |
5493 | return tlink; | |
5494 | ||
5495 | /* return error if we tried this already recently */ | |
5496 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { | |
5497 | cifs_put_tlink(tlink); | |
5498 | return ERR_PTR(-EACCES); | |
5499 | } | |
5500 | ||
5501 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) | |
5502 | goto wait_for_construction; | |
5503 | } | |
5504 | ||
5505 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); | |
5506 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); | |
5507 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); | |
5508 | ||
5509 | if (IS_ERR(tlink->tl_tcon)) { | |
5510 | cifs_put_tlink(tlink); | |
5511 | return ERR_PTR(-EACCES); | |
5512 | } | |
5513 | ||
5514 | return tlink; | |
5515 | } | |
2de970ff JL |
5516 | |
5517 | /* | |
5518 | * periodic workqueue job that scans tcon_tree for a superblock and closes | |
5519 | * out tcons. | |
5520 | */ | |
5521 | static void | |
5522 | cifs_prune_tlinks(struct work_struct *work) | |
5523 | { | |
5524 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, | |
5525 | prune_tlinks.work); | |
b647c35f | 5526 | struct rb_root *root = &cifs_sb->tlink_tree; |
37e12f55 | 5527 | struct rb_node *node; |
b647c35f JL |
5528 | struct rb_node *tmp; |
5529 | struct tcon_link *tlink; | |
2de970ff | 5530 | |
b647c35f JL |
5531 | /* |
5532 | * Because we drop the spinlock in the loop in order to put the tlink | |
5533 | * it's not guarded against removal of links from the tree. The only | |
5534 | * places that remove entries from the tree are this function and | |
5535 | * umounts. Because this function is non-reentrant and is canceled | |
5536 | * before umount can proceed, this is safe. | |
5537 | */ | |
5538 | spin_lock(&cifs_sb->tlink_tree_lock); | |
5539 | node = rb_first(root); | |
5540 | while (node != NULL) { | |
5541 | tmp = node; | |
5542 | node = rb_next(tmp); | |
5543 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); | |
5544 | ||
5545 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || | |
5546 | atomic_read(&tlink->tl_count) != 0 || | |
5547 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) | |
5548 | continue; | |
2de970ff | 5549 | |
b647c35f JL |
5550 | cifs_get_tlink(tlink); |
5551 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); | |
5552 | rb_erase(tmp, root); | |
5553 | ||
5554 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
5555 | cifs_put_tlink(tlink); | |
5556 | spin_lock(&cifs_sb->tlink_tree_lock); | |
5557 | } | |
5558 | spin_unlock(&cifs_sb->tlink_tree_lock); | |
2de970ff | 5559 | |
da472fc8 | 5560 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
2de970ff JL |
5561 | TLINK_IDLE_EXPIRE); |
5562 | } |