Commit | Line | Data |
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457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
f7b422b1 DH |
2 | /* |
3 | * linux/fs/nfs/super.c | |
4 | * | |
5 | * Copyright (C) 1992 Rick Sladkey | |
6 | * | |
7 | * nfs superblock handling functions | |
8 | * | |
526719ba | 9 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
f7b422b1 DH |
10 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
11 | * | |
12 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
13 | * J.S.Peatfield@damtp.cam.ac.uk | |
14 | * | |
15 | * Split from inode.c by David Howells <dhowells@redhat.com> | |
16 | * | |
54ceac45 DH |
17 | * - superblocks are indexed on server only - all inodes, dentries, etc. associated with a |
18 | * particular server are held in the same superblock | |
19 | * - NFS superblocks can have several effective roots to the dentry tree | |
20 | * - directory type roots are spliced into the tree when a path from one root reaches the root | |
21 | * of another (see nfs_lookup()) | |
f7b422b1 DH |
22 | */ |
23 | ||
f7b422b1 DH |
24 | #include <linux/module.h> |
25 | #include <linux/init.h> | |
26 | ||
27 | #include <linux/time.h> | |
28 | #include <linux/kernel.h> | |
29 | #include <linux/mm.h> | |
30 | #include <linux/string.h> | |
31 | #include <linux/stat.h> | |
32 | #include <linux/errno.h> | |
33 | #include <linux/unistd.h> | |
34 | #include <linux/sunrpc/clnt.h> | |
5976687a | 35 | #include <linux/sunrpc/addr.h> |
f7b422b1 DH |
36 | #include <linux/sunrpc/stats.h> |
37 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 38 | #include <linux/sunrpc/xprtsock.h> |
2cf7ff7a | 39 | #include <linux/sunrpc/xprtrdma.h> |
f7b422b1 DH |
40 | #include <linux/nfs_fs.h> |
41 | #include <linux/nfs_mount.h> | |
42 | #include <linux/nfs4_mount.h> | |
43 | #include <linux/lockd/bind.h> | |
f7b422b1 DH |
44 | #include <linux/seq_file.h> |
45 | #include <linux/mount.h> | |
c02d7adf | 46 | #include <linux/namei.h> |
f7b422b1 DH |
47 | #include <linux/vfs.h> |
48 | #include <linux/inet.h> | |
fd00a8ff | 49 | #include <linux/in6.h> |
5a0e3ad6 | 50 | #include <linux/slab.h> |
fd00a8ff | 51 | #include <net/ipv6.h> |
d8e7748a | 52 | #include <linux/netdevice.h> |
f7b422b1 | 53 | #include <linux/nfs_xdr.h> |
b5d5dfbd | 54 | #include <linux/magic.h> |
bf0fd768 | 55 | #include <linux/parser.h> |
e50a7a1a | 56 | #include <linux/nsproxy.h> |
2446ab60 | 57 | #include <linux/rcupdate.h> |
f7b422b1 | 58 | |
7c0f6ba6 | 59 | #include <linux/uaccess.h> |
f7b422b1 DH |
60 | |
61 | #include "nfs4_fs.h" | |
62 | #include "callback.h" | |
63 | #include "delegation.h" | |
64 | #include "iostat.h" | |
65 | #include "internal.h" | |
08734048 | 66 | #include "fscache.h" |
76e697ba | 67 | #include "nfs4session.h" |
ae50c0b5 | 68 | #include "pnfs.h" |
ab7017a3 | 69 | #include "nfs.h" |
f7b422b1 DH |
70 | |
71 | #define NFSDBG_FACILITY NFSDBG_VFS | |
b72e4f42 | 72 | #define NFS_TEXT_DATA 1 |
f7b422b1 | 73 | |
1c606fb7 | 74 | #if IS_ENABLED(CONFIG_NFS_V3) |
1e657bd5 PZ |
75 | #define NFS_DEFAULT_VERSION 3 |
76 | #else | |
77 | #define NFS_DEFAULT_VERSION 2 | |
78 | #endif | |
79 | ||
bf0fd768 CL |
80 | enum { |
81 | /* Mount options that take no arguments */ | |
91a575e1 | 82 | Opt_soft, Opt_softerr, Opt_hard, |
bf0fd768 CL |
83 | Opt_posix, Opt_noposix, |
84 | Opt_cto, Opt_nocto, | |
85 | Opt_ac, Opt_noac, | |
86 | Opt_lock, Opt_nolock, | |
2cf7ff7a | 87 | Opt_udp, Opt_tcp, Opt_rdma, |
bf0fd768 CL |
88 | Opt_acl, Opt_noacl, |
89 | Opt_rdirplus, Opt_nordirplus, | |
75180df2 | 90 | Opt_sharecache, Opt_nosharecache, |
d740351b | 91 | Opt_resvport, Opt_noresvport, |
b797cac7 | 92 | Opt_fscache, Opt_nofscache, |
89652617 | 93 | Opt_migration, Opt_nomigration, |
bf0fd768 CL |
94 | |
95 | /* Mount options that take integer arguments */ | |
96 | Opt_port, | |
97 | Opt_rsize, Opt_wsize, Opt_bsize, | |
98 | Opt_timeo, Opt_retrans, | |
99 | Opt_acregmin, Opt_acregmax, | |
100 | Opt_acdirmin, Opt_acdirmax, | |
101 | Opt_actimeo, | |
102 | Opt_namelen, | |
103 | Opt_mountport, | |
e887cbcf | 104 | Opt_mountvers, |
3fd5be9e | 105 | Opt_minorversion, |
bf0fd768 CL |
106 | |
107 | /* Mount options that take string arguments */ | |
0d71b058 | 108 | Opt_nfsvers, |
33832034 | 109 | Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost, |
0ac83779 | 110 | Opt_addr, Opt_mountaddr, Opt_clientaddr, |
7973c1f1 | 111 | Opt_lookupcache, |
b797cac7 | 112 | Opt_fscache_uniq, |
5eebde23 | 113 | Opt_local_lock, |
bf0fd768 | 114 | |
f45663ce CL |
115 | /* Special mount options */ |
116 | Opt_userspace, Opt_deprecated, Opt_sloppy, | |
bf0fd768 CL |
117 | |
118 | Opt_err | |
119 | }; | |
120 | ||
a447c093 | 121 | static const match_table_t nfs_mount_option_tokens = { |
bf0fd768 CL |
122 | { Opt_userspace, "bg" }, |
123 | { Opt_userspace, "fg" }, | |
ecbb3845 CL |
124 | { Opt_userspace, "retry=%s" }, |
125 | ||
f45663ce CL |
126 | { Opt_sloppy, "sloppy" }, |
127 | ||
bf0fd768 | 128 | { Opt_soft, "soft" }, |
91a575e1 | 129 | { Opt_softerr, "softerr" }, |
bf0fd768 | 130 | { Opt_hard, "hard" }, |
d33e4dfe CL |
131 | { Opt_deprecated, "intr" }, |
132 | { Opt_deprecated, "nointr" }, | |
bf0fd768 CL |
133 | { Opt_posix, "posix" }, |
134 | { Opt_noposix, "noposix" }, | |
135 | { Opt_cto, "cto" }, | |
136 | { Opt_nocto, "nocto" }, | |
137 | { Opt_ac, "ac" }, | |
138 | { Opt_noac, "noac" }, | |
139 | { Opt_lock, "lock" }, | |
140 | { Opt_nolock, "nolock" }, | |
bf0fd768 CL |
141 | { Opt_udp, "udp" }, |
142 | { Opt_tcp, "tcp" }, | |
2cf7ff7a | 143 | { Opt_rdma, "rdma" }, |
bf0fd768 CL |
144 | { Opt_acl, "acl" }, |
145 | { Opt_noacl, "noacl" }, | |
146 | { Opt_rdirplus, "rdirplus" }, | |
147 | { Opt_nordirplus, "nordirplus" }, | |
75180df2 TM |
148 | { Opt_sharecache, "sharecache" }, |
149 | { Opt_nosharecache, "nosharecache" }, | |
d740351b CL |
150 | { Opt_resvport, "resvport" }, |
151 | { Opt_noresvport, "noresvport" }, | |
b797cac7 | 152 | { Opt_fscache, "fsc" }, |
b797cac7 | 153 | { Opt_nofscache, "nofsc" }, |
89652617 CL |
154 | { Opt_migration, "migration" }, |
155 | { Opt_nomigration, "nomigration" }, | |
bf0fd768 | 156 | |
a5a16bae CL |
157 | { Opt_port, "port=%s" }, |
158 | { Opt_rsize, "rsize=%s" }, | |
159 | { Opt_wsize, "wsize=%s" }, | |
160 | { Opt_bsize, "bsize=%s" }, | |
161 | { Opt_timeo, "timeo=%s" }, | |
162 | { Opt_retrans, "retrans=%s" }, | |
163 | { Opt_acregmin, "acregmin=%s" }, | |
164 | { Opt_acregmax, "acregmax=%s" }, | |
165 | { Opt_acdirmin, "acdirmin=%s" }, | |
166 | { Opt_acdirmax, "acdirmax=%s" }, | |
167 | { Opt_actimeo, "actimeo=%s" }, | |
168 | { Opt_namelen, "namlen=%s" }, | |
169 | { Opt_mountport, "mountport=%s" }, | |
170 | { Opt_mountvers, "mountvers=%s" }, | |
0d71b058 TM |
171 | { Opt_minorversion, "minorversion=%s" }, |
172 | ||
a5a16bae CL |
173 | { Opt_nfsvers, "nfsvers=%s" }, |
174 | { Opt_nfsvers, "vers=%s" }, | |
bf0fd768 CL |
175 | |
176 | { Opt_sec, "sec=%s" }, | |
177 | { Opt_proto, "proto=%s" }, | |
178 | { Opt_mountproto, "mountproto=%s" }, | |
179 | { Opt_addr, "addr=%s" }, | |
180 | { Opt_clientaddr, "clientaddr=%s" }, | |
33832034 | 181 | { Opt_mounthost, "mounthost=%s" }, |
0ac83779 | 182 | { Opt_mountaddr, "mountaddr=%s" }, |
bf0fd768 | 183 | |
7973c1f1 | 184 | { Opt_lookupcache, "lookupcache=%s" }, |
a6d5ff64 | 185 | { Opt_fscache_uniq, "fsc=%s" }, |
5eebde23 | 186 | { Opt_local_lock, "local_lock=%s" }, |
7973c1f1 | 187 | |
3862279a TM |
188 | /* The following needs to be listed after all other options */ |
189 | { Opt_nfsvers, "v%s" }, | |
190 | ||
bf0fd768 CL |
191 | { Opt_err, NULL } |
192 | }; | |
193 | ||
194 | enum { | |
ee671b01 | 195 | Opt_xprt_udp, Opt_xprt_udp6, Opt_xprt_tcp, Opt_xprt_tcp6, Opt_xprt_rdma, |
181342c5 | 196 | Opt_xprt_rdma6, |
bf0fd768 CL |
197 | |
198 | Opt_xprt_err | |
199 | }; | |
200 | ||
a447c093 | 201 | static const match_table_t nfs_xprt_protocol_tokens = { |
bf0fd768 | 202 | { Opt_xprt_udp, "udp" }, |
ee671b01 | 203 | { Opt_xprt_udp6, "udp6" }, |
bf0fd768 | 204 | { Opt_xprt_tcp, "tcp" }, |
ee671b01 | 205 | { Opt_xprt_tcp6, "tcp6" }, |
2cf7ff7a | 206 | { Opt_xprt_rdma, "rdma" }, |
181342c5 | 207 | { Opt_xprt_rdma6, "rdma6" }, |
bf0fd768 CL |
208 | |
209 | { Opt_xprt_err, NULL } | |
210 | }; | |
211 | ||
212 | enum { | |
213 | Opt_sec_none, Opt_sec_sys, | |
214 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
215 | Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, | |
216 | Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, | |
217 | ||
218 | Opt_sec_err | |
219 | }; | |
220 | ||
a447c093 | 221 | static const match_table_t nfs_secflavor_tokens = { |
bf0fd768 CL |
222 | { Opt_sec_none, "none" }, |
223 | { Opt_sec_none, "null" }, | |
224 | { Opt_sec_sys, "sys" }, | |
225 | ||
226 | { Opt_sec_krb5, "krb5" }, | |
227 | { Opt_sec_krb5i, "krb5i" }, | |
228 | { Opt_sec_krb5p, "krb5p" }, | |
229 | ||
230 | { Opt_sec_lkey, "lkey" }, | |
231 | { Opt_sec_lkeyi, "lkeyi" }, | |
232 | { Opt_sec_lkeyp, "lkeyp" }, | |
233 | ||
8d042218 OK |
234 | { Opt_sec_spkm, "spkm3" }, |
235 | { Opt_sec_spkmi, "spkm3i" }, | |
236 | { Opt_sec_spkmp, "spkm3p" }, | |
237 | ||
bf0fd768 CL |
238 | { Opt_sec_err, NULL } |
239 | }; | |
240 | ||
7973c1f1 TM |
241 | enum { |
242 | Opt_lookupcache_all, Opt_lookupcache_positive, | |
243 | Opt_lookupcache_none, | |
244 | ||
245 | Opt_lookupcache_err | |
246 | }; | |
247 | ||
248 | static match_table_t nfs_lookupcache_tokens = { | |
249 | { Opt_lookupcache_all, "all" }, | |
250 | { Opt_lookupcache_positive, "pos" }, | |
251 | { Opt_lookupcache_positive, "positive" }, | |
252 | { Opt_lookupcache_none, "none" }, | |
253 | ||
254 | { Opt_lookupcache_err, NULL } | |
255 | }; | |
256 | ||
5eebde23 SJ |
257 | enum { |
258 | Opt_local_lock_all, Opt_local_lock_flock, Opt_local_lock_posix, | |
259 | Opt_local_lock_none, | |
260 | ||
261 | Opt_local_lock_err | |
262 | }; | |
263 | ||
264 | static match_table_t nfs_local_lock_tokens = { | |
265 | { Opt_local_lock_all, "all" }, | |
266 | { Opt_local_lock_flock, "flock" }, | |
267 | { Opt_local_lock_posix, "posix" }, | |
268 | { Opt_local_lock_none, "none" }, | |
269 | ||
270 | { Opt_local_lock_err, NULL } | |
271 | }; | |
272 | ||
0d71b058 TM |
273 | enum { |
274 | Opt_vers_2, Opt_vers_3, Opt_vers_4, Opt_vers_4_0, | |
42c2c424 | 275 | Opt_vers_4_1, Opt_vers_4_2, |
0d71b058 TM |
276 | |
277 | Opt_vers_err | |
278 | }; | |
279 | ||
280 | static match_table_t nfs_vers_tokens = { | |
281 | { Opt_vers_2, "2" }, | |
282 | { Opt_vers_3, "3" }, | |
283 | { Opt_vers_4, "4" }, | |
284 | { Opt_vers_4_0, "4.0" }, | |
285 | { Opt_vers_4_1, "4.1" }, | |
42c2c424 | 286 | { Opt_vers_4_2, "4.2" }, |
0d71b058 TM |
287 | |
288 | { Opt_vers_err, NULL } | |
289 | }; | |
bf0fd768 | 290 | |
31f43471 AV |
291 | static struct dentry *nfs_xdev_mount(struct file_system_type *fs_type, |
292 | int flags, const char *dev_name, void *raw_data); | |
f7b422b1 | 293 | |
ab7017a3 | 294 | struct file_system_type nfs_fs_type = { |
f7b422b1 DH |
295 | .owner = THIS_MODULE, |
296 | .name = "nfs", | |
01194981 | 297 | .mount = nfs_fs_mount, |
f7b422b1 | 298 | .kill_sb = nfs_kill_super, |
ecf3d1f1 | 299 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, |
f7b422b1 | 300 | }; |
7f78e035 | 301 | MODULE_ALIAS_FS("nfs"); |
ddda8e0a | 302 | EXPORT_SYMBOL_GPL(nfs_fs_type); |
f7b422b1 | 303 | |
54ceac45 | 304 | struct file_system_type nfs_xdev_fs_type = { |
f7b422b1 DH |
305 | .owner = THIS_MODULE, |
306 | .name = "nfs", | |
31f43471 | 307 | .mount = nfs_xdev_mount, |
f7b422b1 | 308 | .kill_sb = nfs_kill_super, |
ecf3d1f1 | 309 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
310 | }; |
311 | ||
6a74490d | 312 | const struct super_operations nfs_sops = { |
f7b422b1 | 313 | .alloc_inode = nfs_alloc_inode, |
ca1a199e | 314 | .free_inode = nfs_free_inode, |
f7b422b1 | 315 | .write_inode = nfs_write_inode, |
eed99357 | 316 | .drop_inode = nfs_drop_inode, |
f7b422b1 | 317 | .statfs = nfs_statfs, |
b57922d9 | 318 | .evict_inode = nfs_evict_inode, |
f7b422b1 DH |
319 | .umount_begin = nfs_umount_begin, |
320 | .show_options = nfs_show_options, | |
c7f404b4 AV |
321 | .show_devname = nfs_show_devname, |
322 | .show_path = nfs_show_path, | |
f7b422b1 | 323 | .show_stats = nfs_show_stats, |
48b605f8 | 324 | .remount_fs = nfs_remount, |
f7b422b1 | 325 | }; |
ddda8e0a | 326 | EXPORT_SYMBOL_GPL(nfs_sops); |
f7b422b1 | 327 | |
89d77c8f | 328 | #if IS_ENABLED(CONFIG_NFS_V4) |
b72e4f42 | 329 | static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *); |
d72c727c BS |
330 | static int nfs4_validate_mount_data(void *options, |
331 | struct nfs_parsed_mount_data *args, const char *dev_name); | |
1ae811ee | 332 | |
333 | struct file_system_type nfs4_fs_type = { | |
334 | .owner = THIS_MODULE, | |
335 | .name = "nfs4", | |
336 | .mount = nfs_fs_mount, | |
337 | .kill_sb = nfs_kill_super, | |
ecf3d1f1 | 338 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, |
1ae811ee | 339 | }; |
7f78e035 | 340 | MODULE_ALIAS_FS("nfs4"); |
fa7614dd | 341 | MODULE_ALIAS("nfs4"); |
1ae811ee | 342 | EXPORT_SYMBOL_GPL(nfs4_fs_type); |
343 | ||
344 | static int __init register_nfs4_fs(void) | |
345 | { | |
346 | return register_filesystem(&nfs4_fs_type); | |
347 | } | |
348 | ||
349 | static void unregister_nfs4_fs(void) | |
350 | { | |
351 | unregister_filesystem(&nfs4_fs_type); | |
352 | } | |
353 | #else | |
354 | static int __init register_nfs4_fs(void) | |
355 | { | |
356 | return 0; | |
357 | } | |
358 | ||
359 | static void unregister_nfs4_fs(void) | |
360 | { | |
361 | } | |
f7b422b1 DH |
362 | #endif |
363 | ||
8e1f936b | 364 | static struct shrinker acl_shrinker = { |
1ab6c499 DC |
365 | .count_objects = nfs_access_cache_count, |
366 | .scan_objects = nfs_access_cache_scan, | |
8e1f936b RR |
367 | .seeks = DEFAULT_SEEKS, |
368 | }; | |
979df72e | 369 | |
f7b422b1 DH |
370 | /* |
371 | * Register the NFS filesystems | |
372 | */ | |
373 | int __init register_nfs_fs(void) | |
374 | { | |
375 | int ret; | |
376 | ||
377 | ret = register_filesystem(&nfs_fs_type); | |
378 | if (ret < 0) | |
379 | goto error_0; | |
380 | ||
1ae811ee | 381 | ret = register_nfs4_fs(); |
f7b422b1 DH |
382 | if (ret < 0) |
383 | goto error_1; | |
1ae811ee | 384 | |
385 | ret = nfs_register_sysctl(); | |
386 | if (ret < 0) | |
387 | goto error_2; | |
5ef8d792 KM |
388 | ret = register_shrinker(&acl_shrinker); |
389 | if (ret < 0) | |
390 | goto error_3; | |
f7b422b1 | 391 | return 0; |
5ef8d792 KM |
392 | error_3: |
393 | nfs_unregister_sysctl(); | |
1ae811ee | 394 | error_2: |
395 | unregister_nfs4_fs(); | |
f7b422b1 DH |
396 | error_1: |
397 | unregister_filesystem(&nfs_fs_type); | |
f7b422b1 DH |
398 | error_0: |
399 | return ret; | |
400 | } | |
401 | ||
402 | /* | |
403 | * Unregister the NFS filesystems | |
404 | */ | |
405 | void __exit unregister_nfs_fs(void) | |
406 | { | |
8e1f936b | 407 | unregister_shrinker(&acl_shrinker); |
49af7ee1 | 408 | nfs_unregister_sysctl(); |
1ae811ee | 409 | unregister_nfs4_fs(); |
f7b422b1 DH |
410 | unregister_filesystem(&nfs_fs_type); |
411 | } | |
412 | ||
ea7c38fe | 413 | bool nfs_sb_active(struct super_block *sb) |
ef818a28 | 414 | { |
1daef0a8 | 415 | struct nfs_server *server = NFS_SB(sb); |
ef818a28 | 416 | |
ea7c38fe TM |
417 | if (!atomic_inc_not_zero(&sb->s_active)) |
418 | return false; | |
419 | if (atomic_inc_return(&server->active) != 1) | |
420 | atomic_dec(&sb->s_active); | |
421 | return true; | |
ef818a28 | 422 | } |
89d77c8f | 423 | EXPORT_SYMBOL_GPL(nfs_sb_active); |
ef818a28 | 424 | |
1daef0a8 | 425 | void nfs_sb_deactive(struct super_block *sb) |
ef818a28 SD |
426 | { |
427 | struct nfs_server *server = NFS_SB(sb); | |
1daef0a8 TM |
428 | |
429 | if (atomic_dec_and_test(&server->active)) | |
430 | deactivate_super(sb); | |
ef818a28 | 431 | } |
89d77c8f | 432 | EXPORT_SYMBOL_GPL(nfs_sb_deactive); |
ef818a28 | 433 | |
f7b422b1 DH |
434 | /* |
435 | * Deliver file system statistics to userspace | |
436 | */ | |
fbdefd64 | 437 | int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
f7b422b1 | 438 | { |
0c7d90cf | 439 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
f7b422b1 DH |
440 | unsigned char blockbits; |
441 | unsigned long blockres; | |
2b0143b5 | 442 | struct nfs_fh *fh = NFS_FH(d_inode(dentry)); |
ca7e9a0d TM |
443 | struct nfs_fsstat res; |
444 | int error = -ENOMEM; | |
445 | ||
446 | res.fattr = nfs_alloc_fattr(); | |
447 | if (res.fattr == NULL) | |
448 | goto out_err; | |
f7b422b1 | 449 | |
8fa5c000 | 450 | error = server->nfs_client->rpc_ops->statfs(server, fh, &res); |
fbf3fdd2 MZ |
451 | if (unlikely(error == -ESTALE)) { |
452 | struct dentry *pd_dentry; | |
453 | ||
454 | pd_dentry = dget_parent(dentry); | |
455 | if (pd_dentry != NULL) { | |
2b0143b5 | 456 | nfs_zap_caches(d_inode(pd_dentry)); |
fbf3fdd2 MZ |
457 | dput(pd_dentry); |
458 | } | |
459 | } | |
ca7e9a0d | 460 | nfs_free_fattr(res.fattr); |
f7b422b1 DH |
461 | if (error < 0) |
462 | goto out_err; | |
ca7e9a0d | 463 | |
1a0ba9ae | 464 | buf->f_type = NFS_SUPER_MAGIC; |
f7b422b1 DH |
465 | |
466 | /* | |
467 | * Current versions of glibc do not correctly handle the | |
468 | * case where f_frsize != f_bsize. Eventually we want to | |
469 | * report the value of wtmult in this field. | |
470 | */ | |
0c7d90cf | 471 | buf->f_frsize = dentry->d_sb->s_blocksize; |
f7b422b1 DH |
472 | |
473 | /* | |
474 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
475 | * are reported in units of f_frsize. Linux hasn't had | |
476 | * an f_frsize field in its statfs struct until recently, | |
477 | * thus historically Linux's sys_statfs reports these | |
478 | * fields in units of f_bsize. | |
479 | */ | |
0c7d90cf DH |
480 | buf->f_bsize = dentry->d_sb->s_blocksize; |
481 | blockbits = dentry->d_sb->s_blocksize_bits; | |
f7b422b1 DH |
482 | blockres = (1 << blockbits) - 1; |
483 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
484 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
485 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
486 | ||
487 | buf->f_files = res.tfiles; | |
488 | buf->f_ffree = res.afiles; | |
489 | ||
490 | buf->f_namelen = server->namelen; | |
1a0ba9ae | 491 | |
f7b422b1 DH |
492 | return 0; |
493 | ||
494 | out_err: | |
3110ff80 | 495 | dprintk("%s: statfs error = %d\n", __func__, -error); |
1a0ba9ae | 496 | return error; |
f7b422b1 | 497 | } |
89d77c8f | 498 | EXPORT_SYMBOL_GPL(nfs_statfs); |
f7b422b1 | 499 | |
7d4e2747 DH |
500 | /* |
501 | * Map the security flavour number to a name | |
502 | */ | |
81039f1f TM |
503 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
504 | { | |
7d4e2747 | 505 | static const struct { |
81039f1f TM |
506 | rpc_authflavor_t flavour; |
507 | const char *str; | |
4d4b69dd WAA |
508 | } sec_flavours[NFS_AUTH_INFO_MAX_FLAVORS] = { |
509 | /* update NFS_AUTH_INFO_MAX_FLAVORS when this list changes! */ | |
81039f1f TM |
510 | { RPC_AUTH_NULL, "null" }, |
511 | { RPC_AUTH_UNIX, "sys" }, | |
512 | { RPC_AUTH_GSS_KRB5, "krb5" }, | |
513 | { RPC_AUTH_GSS_KRB5I, "krb5i" }, | |
514 | { RPC_AUTH_GSS_KRB5P, "krb5p" }, | |
515 | { RPC_AUTH_GSS_LKEY, "lkey" }, | |
516 | { RPC_AUTH_GSS_LKEYI, "lkeyi" }, | |
517 | { RPC_AUTH_GSS_LKEYP, "lkeyp" }, | |
518 | { RPC_AUTH_GSS_SPKM, "spkm" }, | |
519 | { RPC_AUTH_GSS_SPKMI, "spkmi" }, | |
520 | { RPC_AUTH_GSS_SPKMP, "spkmp" }, | |
4d81cd16 | 521 | { UINT_MAX, "unknown" } |
81039f1f TM |
522 | }; |
523 | int i; | |
524 | ||
4d81cd16 | 525 | for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) { |
81039f1f TM |
526 | if (sec_flavours[i].flavour == flavour) |
527 | break; | |
528 | } | |
529 | return sec_flavours[i].str; | |
530 | } | |
531 | ||
ee671b01 JL |
532 | static void nfs_show_mountd_netid(struct seq_file *m, struct nfs_server *nfss, |
533 | int showdefaults) | |
534 | { | |
535 | struct sockaddr *sap = (struct sockaddr *) &nfss->mountd_address; | |
6f6e3c09 | 536 | char *proto = NULL; |
ee671b01 | 537 | |
ee671b01 JL |
538 | switch (sap->sa_family) { |
539 | case AF_INET: | |
540 | switch (nfss->mountd_protocol) { | |
541 | case IPPROTO_UDP: | |
6f6e3c09 | 542 | proto = RPCBIND_NETID_UDP; |
ee671b01 JL |
543 | break; |
544 | case IPPROTO_TCP: | |
6f6e3c09 | 545 | proto = RPCBIND_NETID_TCP; |
ee671b01 | 546 | break; |
ee671b01 JL |
547 | } |
548 | break; | |
549 | case AF_INET6: | |
550 | switch (nfss->mountd_protocol) { | |
551 | case IPPROTO_UDP: | |
6f6e3c09 | 552 | proto = RPCBIND_NETID_UDP6; |
ee671b01 JL |
553 | break; |
554 | case IPPROTO_TCP: | |
6f6e3c09 | 555 | proto = RPCBIND_NETID_TCP6; |
ee671b01 | 556 | break; |
ee671b01 JL |
557 | } |
558 | break; | |
ee671b01 | 559 | } |
6f6e3c09 N |
560 | if (proto || showdefaults) |
561 | seq_printf(m, ",mountproto=%s", proto ?: "auto"); | |
ee671b01 JL |
562 | } |
563 | ||
82d101d5 CL |
564 | static void nfs_show_mountd_options(struct seq_file *m, struct nfs_server *nfss, |
565 | int showdefaults) | |
566 | { | |
567 | struct sockaddr *sap = (struct sockaddr *)&nfss->mountd_address; | |
568 | ||
d5eff1a3 BS |
569 | if (nfss->flags & NFS_MOUNT_LEGACY_INTERFACE) |
570 | return; | |
571 | ||
82d101d5 CL |
572 | switch (sap->sa_family) { |
573 | case AF_INET: { | |
574 | struct sockaddr_in *sin = (struct sockaddr_in *)sap; | |
be859405 | 575 | seq_printf(m, ",mountaddr=%pI4", &sin->sin_addr.s_addr); |
82d101d5 CL |
576 | break; |
577 | } | |
578 | case AF_INET6: { | |
579 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
d250e190 | 580 | seq_printf(m, ",mountaddr=%pI6c", &sin6->sin6_addr); |
82d101d5 CL |
581 | break; |
582 | } | |
583 | default: | |
584 | if (showdefaults) | |
585 | seq_printf(m, ",mountaddr=unspecified"); | |
586 | } | |
587 | ||
588 | if (nfss->mountd_version || showdefaults) | |
589 | seq_printf(m, ",mountvers=%u", nfss->mountd_version); | |
aa699473 SK |
590 | if ((nfss->mountd_port && |
591 | nfss->mountd_port != (unsigned short)NFS_UNSPEC_PORT) || | |
592 | showdefaults) | |
82d101d5 CL |
593 | seq_printf(m, ",mountport=%u", nfss->mountd_port); |
594 | ||
ee671b01 | 595 | nfs_show_mountd_netid(m, nfss, showdefaults); |
82d101d5 CL |
596 | } |
597 | ||
89d77c8f | 598 | #if IS_ENABLED(CONFIG_NFS_V4) |
0be8189f TM |
599 | static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss, |
600 | int showdefaults) | |
601 | { | |
602 | struct nfs_client *clp = nfss->nfs_client; | |
603 | ||
604 | seq_printf(m, ",clientaddr=%s", clp->cl_ipaddr); | |
0be8189f TM |
605 | } |
606 | #else | |
607 | static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss, | |
608 | int showdefaults) | |
609 | { | |
610 | } | |
611 | #endif | |
612 | ||
7bbceb6f TM |
613 | static void nfs_show_nfs_version(struct seq_file *m, |
614 | unsigned int version, | |
615 | unsigned int minorversion) | |
616 | { | |
617 | seq_printf(m, ",vers=%u", version); | |
618 | if (version == 4) | |
619 | seq_printf(m, ".%u", minorversion); | |
620 | } | |
621 | ||
f7b422b1 DH |
622 | /* |
623 | * Describe the mount options in force on this server representation | |
624 | */ | |
82d101d5 CL |
625 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, |
626 | int showdefaults) | |
f7b422b1 | 627 | { |
509de811 | 628 | static const struct proc_nfs_info { |
f7b422b1 | 629 | int flag; |
509de811 DH |
630 | const char *str; |
631 | const char *nostr; | |
f7b422b1 | 632 | } nfs_info[] = { |
91a575e1 TM |
633 | { NFS_MOUNT_SOFT, ",soft", "" }, |
634 | { NFS_MOUNT_SOFTERR, ",softerr", "" }, | |
82d101d5 | 635 | { NFS_MOUNT_POSIX, ",posix", "" }, |
f7b422b1 DH |
636 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
637 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
638 | { NFS_MOUNT_NONLM, ",nolock", "" }, | |
639 | { NFS_MOUNT_NOACL, ",noacl", "" }, | |
74dd34e6 | 640 | { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" }, |
d740351b CL |
641 | { NFS_MOUNT_UNSHARED, ",nosharecache", "" }, |
642 | { NFS_MOUNT_NORESVPORT, ",noresvport", "" }, | |
f7b422b1 DH |
643 | { 0, NULL, NULL } |
644 | }; | |
509de811 | 645 | const struct proc_nfs_info *nfs_infop; |
8fa5c000 | 646 | struct nfs_client *clp = nfss->nfs_client; |
82d101d5 | 647 | u32 version = clp->rpc_ops->version; |
7c563cc9 | 648 | int local_flock, local_fcntl; |
f7b422b1 | 649 | |
7bbceb6f | 650 | nfs_show_nfs_version(m, version, clp->cl_minorversion); |
2d767432 CL |
651 | seq_printf(m, ",rsize=%u", nfss->rsize); |
652 | seq_printf(m, ",wsize=%u", nfss->wsize); | |
82d101d5 CL |
653 | if (nfss->bsize != 0) |
654 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
655 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
0e0cab74 | 656 | if (nfss->acregmin != NFS_DEF_ACREGMIN*HZ || showdefaults) |
2d767432 | 657 | seq_printf(m, ",acregmin=%u", nfss->acregmin/HZ); |
0e0cab74 | 658 | if (nfss->acregmax != NFS_DEF_ACREGMAX*HZ || showdefaults) |
2d767432 | 659 | seq_printf(m, ",acregmax=%u", nfss->acregmax/HZ); |
0e0cab74 | 660 | if (nfss->acdirmin != NFS_DEF_ACDIRMIN*HZ || showdefaults) |
2d767432 | 661 | seq_printf(m, ",acdirmin=%u", nfss->acdirmin/HZ); |
0e0cab74 | 662 | if (nfss->acdirmax != NFS_DEF_ACDIRMAX*HZ || showdefaults) |
2d767432 | 663 | seq_printf(m, ",acdirmax=%u", nfss->acdirmax/HZ); |
91a575e1 TM |
664 | if (!(nfss->flags & (NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR))) |
665 | seq_puts(m, ",hard"); | |
f7b422b1 DH |
666 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { |
667 | if (nfss->flags & nfs_infop->flag) | |
668 | seq_puts(m, nfs_infop->str); | |
669 | else | |
670 | seq_puts(m, nfs_infop->nostr); | |
671 | } | |
2446ab60 | 672 | rcu_read_lock(); |
56928edd | 673 | seq_printf(m, ",proto=%s", |
ee671b01 | 674 | rpc_peeraddr2str(nfss->client, RPC_DISPLAY_NETID)); |
2446ab60 | 675 | rcu_read_unlock(); |
82d101d5 CL |
676 | if (version == 4) { |
677 | if (nfss->port != NFS_PORT) | |
678 | seq_printf(m, ",port=%u", nfss->port); | |
679 | } else | |
680 | if (nfss->port) | |
681 | seq_printf(m, ",port=%u", nfss->port); | |
682 | ||
33170233 TM |
683 | seq_printf(m, ",timeo=%lu", 10U * nfss->client->cl_timeout->to_initval / HZ); |
684 | seq_printf(m, ",retrans=%u", nfss->client->cl_timeout->to_retries); | |
81039f1f | 685 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
82d101d5 CL |
686 | |
687 | if (version != 4) | |
688 | nfs_show_mountd_options(m, nfss, showdefaults); | |
0be8189f TM |
689 | else |
690 | nfs_show_nfsv4_options(m, nfss, showdefaults); | |
82d101d5 | 691 | |
b797cac7 DH |
692 | if (nfss->options & NFS_OPTION_FSCACHE) |
693 | seq_printf(m, ",fsc"); | |
9b00c643 | 694 | |
89652617 CL |
695 | if (nfss->options & NFS_OPTION_MIGRATION) |
696 | seq_printf(m, ",migration"); | |
697 | ||
9b00c643 PL |
698 | if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONEG) { |
699 | if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONE) | |
700 | seq_printf(m, ",lookupcache=none"); | |
701 | else | |
702 | seq_printf(m, ",lookupcache=pos"); | |
703 | } | |
7c563cc9 SJ |
704 | |
705 | local_flock = nfss->flags & NFS_MOUNT_LOCAL_FLOCK; | |
706 | local_fcntl = nfss->flags & NFS_MOUNT_LOCAL_FCNTL; | |
707 | ||
708 | if (!local_flock && !local_fcntl) | |
709 | seq_printf(m, ",local_lock=none"); | |
710 | else if (local_flock && local_fcntl) | |
711 | seq_printf(m, ",local_lock=all"); | |
712 | else if (local_flock) | |
713 | seq_printf(m, ",local_lock=flock"); | |
714 | else | |
715 | seq_printf(m, ",local_lock=posix"); | |
f7b422b1 DH |
716 | } |
717 | ||
718 | /* | |
719 | * Describe the mount options on this VFS mountpoint | |
720 | */ | |
fbdefd64 | 721 | int nfs_show_options(struct seq_file *m, struct dentry *root) |
f7b422b1 | 722 | { |
34c80b1d | 723 | struct nfs_server *nfss = NFS_SB(root->d_sb); |
f7b422b1 DH |
724 | |
725 | nfs_show_mount_options(m, nfss, 0); | |
726 | ||
2446ab60 | 727 | rcu_read_lock(); |
5d8515ca CL |
728 | seq_printf(m, ",addr=%s", |
729 | rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient, | |
730 | RPC_DISPLAY_ADDR)); | |
2446ab60 | 731 | rcu_read_unlock(); |
f7b422b1 DH |
732 | |
733 | return 0; | |
734 | } | |
89d77c8f | 735 | EXPORT_SYMBOL_GPL(nfs_show_options); |
45402c38 | 736 | |
89d77c8f | 737 | #if IS_ENABLED(CONFIG_NFS_V4) |
ae50c0b5 | 738 | #ifdef CONFIG_NFS_V4_1 |
45402c38 | 739 | static void show_sessions(struct seq_file *m, struct nfs_server *server) |
ae50c0b5 BF |
740 | { |
741 | if (nfs4_has_session(server->nfs_client)) | |
742 | seq_printf(m, ",sessions"); | |
743 | } | |
744 | #else | |
45402c38 HS |
745 | static void show_sessions(struct seq_file *m, struct nfs_server *server) {} |
746 | #endif | |
ae50c0b5 BF |
747 | #endif |
748 | ||
749 | #ifdef CONFIG_NFS_V4_1 | |
45402c38 | 750 | static void show_pnfs(struct seq_file *m, struct nfs_server *server) |
ae50c0b5 BF |
751 | { |
752 | seq_printf(m, ",pnfs="); | |
753 | if (server->pnfs_curr_ld) | |
754 | seq_printf(m, "%s", server->pnfs_curr_ld->name); | |
755 | else | |
756 | seq_printf(m, "not configured"); | |
757 | } | |
7e03b7cc TM |
758 | |
759 | static void show_implementation_id(struct seq_file *m, struct nfs_server *nfss) | |
760 | { | |
59155546 CL |
761 | if (nfss->nfs_client && nfss->nfs_client->cl_implid) { |
762 | struct nfs41_impl_id *impl_id = nfss->nfs_client->cl_implid; | |
7e03b7cc TM |
763 | seq_printf(m, "\n\timpl_id:\tname='%s',domain='%s'," |
764 | "date='%llu,%u'", | |
765 | impl_id->name, impl_id->domain, | |
766 | impl_id->date.seconds, impl_id->date.nseconds); | |
767 | } | |
768 | } | |
45402c38 | 769 | #else |
89d77c8f | 770 | #if IS_ENABLED(CONFIG_NFS_V4) |
7e03b7cc TM |
771 | static void show_pnfs(struct seq_file *m, struct nfs_server *server) |
772 | { | |
773 | } | |
45402c38 | 774 | #endif |
7e03b7cc TM |
775 | static void show_implementation_id(struct seq_file *m, struct nfs_server *nfss) |
776 | { | |
777 | } | |
45402c38 | 778 | #endif |
f7b422b1 | 779 | |
fbdefd64 | 780 | int nfs_show_devname(struct seq_file *m, struct dentry *root) |
c7f404b4 AV |
781 | { |
782 | char *page = (char *) __get_free_page(GFP_KERNEL); | |
783 | char *devname, *dummy; | |
784 | int err = 0; | |
785 | if (!page) | |
786 | return -ENOMEM; | |
97a54868 | 787 | devname = nfs_path(&dummy, root, page, PAGE_SIZE, 0); |
c7f404b4 AV |
788 | if (IS_ERR(devname)) |
789 | err = PTR_ERR(devname); | |
790 | else | |
791 | seq_escape(m, devname, " \t\n\\"); | |
792 | free_page((unsigned long)page); | |
793 | return err; | |
794 | } | |
89d77c8f | 795 | EXPORT_SYMBOL_GPL(nfs_show_devname); |
c7f404b4 | 796 | |
fbdefd64 | 797 | int nfs_show_path(struct seq_file *m, struct dentry *dentry) |
c7f404b4 AV |
798 | { |
799 | seq_puts(m, "/"); | |
800 | return 0; | |
801 | } | |
89d77c8f | 802 | EXPORT_SYMBOL_GPL(nfs_show_path); |
c7f404b4 | 803 | |
f7b422b1 DH |
804 | /* |
805 | * Present statistical information for this VFS mountpoint | |
806 | */ | |
fbdefd64 | 807 | int nfs_show_stats(struct seq_file *m, struct dentry *root) |
f7b422b1 DH |
808 | { |
809 | int i, cpu; | |
64132379 | 810 | struct nfs_server *nfss = NFS_SB(root->d_sb); |
f7b422b1 DH |
811 | struct rpc_auth *auth = nfss->client->cl_auth; |
812 | struct nfs_iostats totals = { }; | |
813 | ||
814 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
815 | ||
816 | /* | |
817 | * Display all mount option settings | |
818 | */ | |
819 | seq_printf(m, "\n\topts:\t"); | |
bc98a42c | 820 | seq_puts(m, sb_rdonly(root->d_sb) ? "ro" : "rw"); |
1751e8a6 LT |
821 | seq_puts(m, root->d_sb->s_flags & SB_SYNCHRONOUS ? ",sync" : ""); |
822 | seq_puts(m, root->d_sb->s_flags & SB_NOATIME ? ",noatime" : ""); | |
823 | seq_puts(m, root->d_sb->s_flags & SB_NODIRATIME ? ",nodiratime" : ""); | |
f7b422b1 DH |
824 | nfs_show_mount_options(m, nfss, 1); |
825 | ||
826 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); | |
827 | ||
7e03b7cc | 828 | show_implementation_id(m, nfss); |
7d2ed9ac | 829 | |
f7b422b1 DH |
830 | seq_printf(m, "\n\tcaps:\t"); |
831 | seq_printf(m, "caps=0x%x", nfss->caps); | |
2d767432 CL |
832 | seq_printf(m, ",wtmult=%u", nfss->wtmult); |
833 | seq_printf(m, ",dtsize=%u", nfss->dtsize); | |
834 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
835 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
f7b422b1 | 836 | |
89d77c8f | 837 | #if IS_ENABLED(CONFIG_NFS_V4) |
40c55319 | 838 | if (nfss->nfs_client->rpc_ops->version == 4) { |
f7b422b1 DH |
839 | seq_printf(m, "\n\tnfsv4:\t"); |
840 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); | |
841 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
a09df2ca | 842 | seq_printf(m, ",bm2=0x%x", nfss->attr_bitmask[2]); |
f7b422b1 | 843 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); |
ae50c0b5 BF |
844 | show_sessions(m, nfss); |
845 | show_pnfs(m, nfss); | |
f7b422b1 DH |
846 | } |
847 | #endif | |
848 | ||
849 | /* | |
850 | * Display security flavor in effect for this mount | |
851 | */ | |
2d767432 | 852 | seq_printf(m, "\n\tsec:\tflavor=%u", auth->au_ops->au_flavor); |
f7b422b1 | 853 | if (auth->au_flavor) |
2d767432 | 854 | seq_printf(m, ",pseudoflavor=%u", auth->au_flavor); |
f7b422b1 DH |
855 | |
856 | /* | |
857 | * Display superblock I/O counters | |
858 | */ | |
859 | for_each_possible_cpu(cpu) { | |
860 | struct nfs_iostats *stats; | |
861 | ||
862 | preempt_disable(); | |
863 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
864 | ||
865 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
866 | totals.events[i] += stats->events[i]; | |
867 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
868 | totals.bytes[i] += stats->bytes[i]; | |
6a51091d DH |
869 | #ifdef CONFIG_NFS_FSCACHE |
870 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
871 | totals.fscache[i] += stats->fscache[i]; | |
872 | #endif | |
f7b422b1 DH |
873 | |
874 | preempt_enable(); | |
875 | } | |
876 | ||
877 | seq_printf(m, "\n\tevents:\t"); | |
878 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
879 | seq_printf(m, "%lu ", totals.events[i]); | |
880 | seq_printf(m, "\n\tbytes:\t"); | |
881 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
882 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
6a51091d DH |
883 | #ifdef CONFIG_NFS_FSCACHE |
884 | if (nfss->options & NFS_OPTION_FSCACHE) { | |
885 | seq_printf(m, "\n\tfsc:\t"); | |
886 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
ce85bd29 | 887 | seq_printf(m, "%Lu ", totals.fscache[i]); |
6a51091d DH |
888 | } |
889 | #endif | |
f7b422b1 DH |
890 | seq_printf(m, "\n"); |
891 | ||
016583d7 | 892 | rpc_clnt_show_stats(m, nfss->client); |
f7b422b1 DH |
893 | |
894 | return 0; | |
895 | } | |
89d77c8f | 896 | EXPORT_SYMBOL_GPL(nfs_show_stats); |
f7b422b1 DH |
897 | |
898 | /* | |
899 | * Begin unmount by attempting to remove all automounted mountpoints we added | |
54ceac45 | 900 | * in response to xdev traversals and referrals |
f7b422b1 | 901 | */ |
fbdefd64 | 902 | void nfs_umount_begin(struct super_block *sb) |
f7b422b1 | 903 | { |
67e55205 | 904 | struct nfs_server *server; |
fc6ae3cf TM |
905 | struct rpc_clnt *rpc; |
906 | ||
67e55205 | 907 | server = NFS_SB(sb); |
fc6ae3cf TM |
908 | /* -EIO all pending I/O */ |
909 | rpc = server->client_acl; | |
910 | if (!IS_ERR(rpc)) | |
911 | rpc_killall_tasks(rpc); | |
912 | rpc = server->client; | |
913 | if (!IS_ERR(rpc)) | |
914 | rpc_killall_tasks(rpc); | |
f7b422b1 | 915 | } |
89d77c8f | 916 | EXPORT_SYMBOL_GPL(nfs_umount_begin); |
f7b422b1 | 917 | |
db833351 | 918 | static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void) |
9423a08a CL |
919 | { |
920 | struct nfs_parsed_mount_data *data; | |
921 | ||
922 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
923 | if (data) { | |
a956beda TM |
924 | data->timeo = NFS_UNSPEC_TIMEO; |
925 | data->retrans = NFS_UNSPEC_RETRANS; | |
9423a08a CL |
926 | data->acregmin = NFS_DEF_ACREGMIN; |
927 | data->acregmax = NFS_DEF_ACREGMAX; | |
928 | data->acdirmin = NFS_DEF_ACDIRMIN; | |
929 | data->acdirmax = NFS_DEF_ACDIRMAX; | |
c5811dbd | 930 | data->mount_server.port = NFS_UNSPEC_PORT; |
9423a08a | 931 | data->nfs_server.port = NFS_UNSPEC_PORT; |
c5811dbd | 932 | data->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
a3f73c27 | 933 | data->selected_flavor = RPC_AUTH_MAXFLAVOR; |
9423a08a | 934 | data->minorversion = 0; |
b72e4f42 | 935 | data->need_mount = true; |
9937347a | 936 | data->net = current->nsproxy->net_ns; |
204cc0cc | 937 | data->lsm_opts = NULL; |
9423a08a CL |
938 | } |
939 | return data; | |
940 | } | |
941 | ||
8a0d551a JL |
942 | static void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data *data) |
943 | { | |
944 | if (data) { | |
945 | kfree(data->client_address); | |
946 | kfree(data->mount_server.hostname); | |
947 | kfree(data->nfs_server.export_path); | |
948 | kfree(data->nfs_server.hostname); | |
949 | kfree(data->fscache_uniq); | |
950 | security_free_mnt_opts(&data->lsm_opts); | |
951 | kfree(data); | |
952 | } | |
953 | } | |
954 | ||
fc50d58f | 955 | /* |
cdcd7f9a CL |
956 | * Sanity-check a server address provided by the mount command. |
957 | * | |
958 | * Address family must be initialized, and address must not be | |
959 | * the ANY address for that family. | |
fc50d58f CL |
960 | */ |
961 | static int nfs_verify_server_address(struct sockaddr *addr) | |
962 | { | |
963 | switch (addr->sa_family) { | |
964 | case AF_INET: { | |
cdcd7f9a | 965 | struct sockaddr_in *sa = (struct sockaddr_in *)addr; |
e6f1cebf | 966 | return sa->sin_addr.s_addr != htonl(INADDR_ANY); |
cdcd7f9a CL |
967 | } |
968 | case AF_INET6: { | |
969 | struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr; | |
970 | return !ipv6_addr_any(sa); | |
fc50d58f CL |
971 | } |
972 | } | |
973 | ||
53a0b9c4 | 974 | dfprintk(MOUNT, "NFS: Invalid IP address specified\n"); |
fc50d58f CL |
975 | return 0; |
976 | } | |
977 | ||
4cfd74fc CL |
978 | /* |
979 | * Select between a default port value and a user-specified port value. | |
980 | * If a zero value is set, then autobind will be used. | |
981 | */ | |
f5855fec | 982 | static void nfs_set_port(struct sockaddr *sap, int *port, |
4cfd74fc CL |
983 | const unsigned short default_port) |
984 | { | |
f5855fec TM |
985 | if (*port == NFS_UNSPEC_PORT) |
986 | *port = default_port; | |
4cfd74fc | 987 | |
f5855fec | 988 | rpc_set_port(sap, *port); |
4cfd74fc CL |
989 | } |
990 | ||
259875ef TM |
991 | /* |
992 | * Sanity check the NFS transport protocol. | |
993 | * | |
994 | */ | |
995 | static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
996 | { | |
997 | switch (mnt->nfs_server.protocol) { | |
998 | case XPRT_TRANSPORT_UDP: | |
999 | case XPRT_TRANSPORT_TCP: | |
1000 | case XPRT_TRANSPORT_RDMA: | |
1001 | break; | |
1002 | default: | |
1003 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; | |
1004 | } | |
1005 | } | |
1006 | ||
1007 | /* | |
1008 | * For text based NFSv2/v3 mounts, the mount protocol transport default | |
1009 | * settings should depend upon the specified NFS transport. | |
1010 | */ | |
1011 | static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
1012 | { | |
1013 | nfs_validate_transport_protocol(mnt); | |
1014 | ||
1015 | if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP || | |
1016 | mnt->mount_server.protocol == XPRT_TRANSPORT_TCP) | |
1017 | return; | |
1018 | switch (mnt->nfs_server.protocol) { | |
1019 | case XPRT_TRANSPORT_UDP: | |
1020 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; | |
1021 | break; | |
1022 | case XPRT_TRANSPORT_TCP: | |
1023 | case XPRT_TRANSPORT_RDMA: | |
1024 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; | |
1025 | } | |
1026 | } | |
1027 | ||
4d4b69dd WAA |
1028 | /* |
1029 | * Add 'flavor' to 'auth_info' if not already present. | |
1030 | * Returns true if 'flavor' ends up in the list, false otherwise | |
1031 | */ | |
1032 | static bool nfs_auth_info_add(struct nfs_auth_info *auth_info, | |
1033 | rpc_authflavor_t flavor) | |
1034 | { | |
1035 | unsigned int i; | |
00216026 | 1036 | unsigned int max_flavor_len = ARRAY_SIZE(auth_info->flavors); |
4d4b69dd WAA |
1037 | |
1038 | /* make sure this flavor isn't already in the list */ | |
1039 | for (i = 0; i < auth_info->flavor_len; i++) { | |
1040 | if (flavor == auth_info->flavors[i]) | |
1041 | return true; | |
1042 | } | |
1043 | ||
1044 | if (auth_info->flavor_len + 1 >= max_flavor_len) { | |
1045 | dfprintk(MOUNT, "NFS: too many sec= flavors\n"); | |
1046 | return false; | |
1047 | } | |
1048 | ||
1049 | auth_info->flavors[auth_info->flavor_len++] = flavor; | |
1050 | return true; | |
1051 | } | |
1052 | ||
1053 | /* | |
1054 | * Return true if 'match' is in auth_info or auth_info is empty. | |
1055 | * Return false otherwise. | |
1056 | */ | |
1057 | bool nfs_auth_info_match(const struct nfs_auth_info *auth_info, | |
1058 | rpc_authflavor_t match) | |
1059 | { | |
1060 | int i; | |
1061 | ||
1062 | if (!auth_info->flavor_len) | |
1063 | return true; | |
1064 | ||
1065 | for (i = 0; i < auth_info->flavor_len; i++) { | |
1066 | if (auth_info->flavors[i] == match) | |
1067 | return true; | |
1068 | } | |
1069 | return false; | |
1070 | } | |
1071 | EXPORT_SYMBOL_GPL(nfs_auth_info_match); | |
1072 | ||
01060c89 CL |
1073 | /* |
1074 | * Parse the value of the 'sec=' option. | |
01060c89 CL |
1075 | */ |
1076 | static int nfs_parse_security_flavors(char *value, | |
1077 | struct nfs_parsed_mount_data *mnt) | |
1078 | { | |
1079 | substring_t args[MAX_OPT_ARGS]; | |
19e7b8d2 | 1080 | rpc_authflavor_t pseudoflavor; |
4d4b69dd | 1081 | char *p; |
01060c89 CL |
1082 | |
1083 | dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); | |
1084 | ||
4d4b69dd WAA |
1085 | while ((p = strsep(&value, ":")) != NULL) { |
1086 | switch (match_token(p, nfs_secflavor_tokens, args)) { | |
1087 | case Opt_sec_none: | |
1088 | pseudoflavor = RPC_AUTH_NULL; | |
1089 | break; | |
1090 | case Opt_sec_sys: | |
1091 | pseudoflavor = RPC_AUTH_UNIX; | |
1092 | break; | |
1093 | case Opt_sec_krb5: | |
1094 | pseudoflavor = RPC_AUTH_GSS_KRB5; | |
1095 | break; | |
1096 | case Opt_sec_krb5i: | |
1097 | pseudoflavor = RPC_AUTH_GSS_KRB5I; | |
1098 | break; | |
1099 | case Opt_sec_krb5p: | |
1100 | pseudoflavor = RPC_AUTH_GSS_KRB5P; | |
1101 | break; | |
1102 | case Opt_sec_lkey: | |
1103 | pseudoflavor = RPC_AUTH_GSS_LKEY; | |
1104 | break; | |
1105 | case Opt_sec_lkeyi: | |
1106 | pseudoflavor = RPC_AUTH_GSS_LKEYI; | |
1107 | break; | |
1108 | case Opt_sec_lkeyp: | |
1109 | pseudoflavor = RPC_AUTH_GSS_LKEYP; | |
1110 | break; | |
1111 | case Opt_sec_spkm: | |
1112 | pseudoflavor = RPC_AUTH_GSS_SPKM; | |
1113 | break; | |
1114 | case Opt_sec_spkmi: | |
1115 | pseudoflavor = RPC_AUTH_GSS_SPKMI; | |
1116 | break; | |
1117 | case Opt_sec_spkmp: | |
1118 | pseudoflavor = RPC_AUTH_GSS_SPKMP; | |
1119 | break; | |
1120 | default: | |
1121 | dfprintk(MOUNT, | |
1122 | "NFS: sec= option '%s' not recognized\n", p); | |
1123 | return 0; | |
1124 | } | |
1125 | ||
1126 | if (!nfs_auth_info_add(&mnt->auth_info, pseudoflavor)) | |
1127 | return 0; | |
01060c89 CL |
1128 | } |
1129 | ||
1130 | return 1; | |
1131 | } | |
1132 | ||
0d71b058 TM |
1133 | static int nfs_parse_version_string(char *string, |
1134 | struct nfs_parsed_mount_data *mnt, | |
1135 | substring_t *args) | |
1136 | { | |
1137 | mnt->flags &= ~NFS_MOUNT_VER3; | |
1138 | switch (match_token(string, nfs_vers_tokens, args)) { | |
1139 | case Opt_vers_2: | |
1140 | mnt->version = 2; | |
1141 | break; | |
1142 | case Opt_vers_3: | |
1143 | mnt->flags |= NFS_MOUNT_VER3; | |
1144 | mnt->version = 3; | |
1145 | break; | |
1146 | case Opt_vers_4: | |
1147 | /* Backward compatibility option. In future, | |
1148 | * the mount program should always supply | |
1149 | * a NFSv4 minor version number. | |
1150 | */ | |
1151 | mnt->version = 4; | |
1152 | break; | |
1153 | case Opt_vers_4_0: | |
1154 | mnt->version = 4; | |
1155 | mnt->minorversion = 0; | |
1156 | break; | |
1157 | case Opt_vers_4_1: | |
1158 | mnt->version = 4; | |
1159 | mnt->minorversion = 1; | |
1160 | break; | |
42c2c424 SD |
1161 | case Opt_vers_4_2: |
1162 | mnt->version = 4; | |
1163 | mnt->minorversion = 2; | |
1164 | break; | |
0d71b058 TM |
1165 | default: |
1166 | return 0; | |
1167 | } | |
1168 | return 1; | |
1169 | } | |
1170 | ||
c5cb09b6 RL |
1171 | static int nfs_get_option_str(substring_t args[], char **option) |
1172 | { | |
1173 | kfree(*option); | |
1174 | *option = match_strdup(args); | |
e25fbe38 | 1175 | return !*option; |
c5cb09b6 RL |
1176 | } |
1177 | ||
1178 | static int nfs_get_option_ul(substring_t args[], unsigned long *option) | |
1179 | { | |
1180 | int rc; | |
1181 | char *string; | |
1182 | ||
1183 | string = match_strdup(args); | |
1184 | if (string == NULL) | |
1185 | return -ENOMEM; | |
7297cb68 | 1186 | rc = kstrtoul(string, 10, option); |
c5cb09b6 RL |
1187 | kfree(string); |
1188 | ||
1189 | return rc; | |
1190 | } | |
1191 | ||
a956beda TM |
1192 | static int nfs_get_option_ul_bound(substring_t args[], unsigned long *option, |
1193 | unsigned long l_bound, unsigned long u_bound) | |
1194 | { | |
1195 | int ret; | |
1196 | ||
1197 | ret = nfs_get_option_ul(args, option); | |
1198 | if (ret != 0) | |
1199 | return ret; | |
1200 | if (*option < l_bound || *option > u_bound) | |
1201 | return -ERANGE; | |
1202 | return 0; | |
1203 | } | |
1204 | ||
bf0fd768 CL |
1205 | /* |
1206 | * Error-check and convert a string of mount options from user space into | |
f45663ce CL |
1207 | * a data structure. The whole mount string is processed; bad options are |
1208 | * skipped as they are encountered. If there were no errors, return 1; | |
1209 | * otherwise return 0 (zero). | |
bf0fd768 CL |
1210 | */ |
1211 | static int nfs_parse_mount_options(char *raw, | |
1212 | struct nfs_parsed_mount_data *mnt) | |
1213 | { | |
f5c0c26d | 1214 | char *p, *string; |
d23c45fd | 1215 | int rc, sloppy = 0, invalid_option = 0; |
ee671b01 JL |
1216 | unsigned short protofamily = AF_UNSPEC; |
1217 | unsigned short mountfamily = AF_UNSPEC; | |
bf0fd768 CL |
1218 | |
1219 | if (!raw) { | |
1220 | dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); | |
1221 | return 1; | |
1222 | } | |
1223 | dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); | |
1224 | ||
f5c0c26d | 1225 | rc = security_sb_eat_lsm_opts(raw, &mnt->lsm_opts); |
f9c3a380 EP |
1226 | if (rc) |
1227 | goto out_security_failure; | |
1228 | ||
bf0fd768 CL |
1229 | while ((p = strsep(&raw, ",")) != NULL) { |
1230 | substring_t args[MAX_OPT_ARGS]; | |
a5a16bae CL |
1231 | unsigned long option; |
1232 | int token; | |
bf0fd768 CL |
1233 | |
1234 | if (!*p) | |
1235 | continue; | |
1236 | ||
1237 | dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); | |
1238 | ||
1239 | token = match_token(p, nfs_mount_option_tokens, args); | |
1240 | switch (token) { | |
f45663ce CL |
1241 | |
1242 | /* | |
1243 | * boolean options: foo/nofoo | |
1244 | */ | |
bf0fd768 CL |
1245 | case Opt_soft: |
1246 | mnt->flags |= NFS_MOUNT_SOFT; | |
91a575e1 | 1247 | mnt->flags &= ~NFS_MOUNT_SOFTERR; |
bf0fd768 | 1248 | break; |
91a575e1 TM |
1249 | case Opt_softerr: |
1250 | mnt->flags |= NFS_MOUNT_SOFTERR; | |
bf0fd768 CL |
1251 | mnt->flags &= ~NFS_MOUNT_SOFT; |
1252 | break; | |
91a575e1 TM |
1253 | case Opt_hard: |
1254 | mnt->flags &= ~(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR); | |
1255 | break; | |
bf0fd768 CL |
1256 | case Opt_posix: |
1257 | mnt->flags |= NFS_MOUNT_POSIX; | |
1258 | break; | |
1259 | case Opt_noposix: | |
1260 | mnt->flags &= ~NFS_MOUNT_POSIX; | |
1261 | break; | |
1262 | case Opt_cto: | |
1263 | mnt->flags &= ~NFS_MOUNT_NOCTO; | |
1264 | break; | |
1265 | case Opt_nocto: | |
1266 | mnt->flags |= NFS_MOUNT_NOCTO; | |
1267 | break; | |
1268 | case Opt_ac: | |
1269 | mnt->flags &= ~NFS_MOUNT_NOAC; | |
1270 | break; | |
1271 | case Opt_noac: | |
1272 | mnt->flags |= NFS_MOUNT_NOAC; | |
1273 | break; | |
1274 | case Opt_lock: | |
1275 | mnt->flags &= ~NFS_MOUNT_NONLM; | |
5eebde23 SJ |
1276 | mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | |
1277 | NFS_MOUNT_LOCAL_FCNTL); | |
bf0fd768 CL |
1278 | break; |
1279 | case Opt_nolock: | |
1280 | mnt->flags |= NFS_MOUNT_NONLM; | |
5eebde23 SJ |
1281 | mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | |
1282 | NFS_MOUNT_LOCAL_FCNTL); | |
bf0fd768 | 1283 | break; |
bf0fd768 CL |
1284 | case Opt_udp: |
1285 | mnt->flags &= ~NFS_MOUNT_TCP; | |
0896a725 | 1286 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 CL |
1287 | break; |
1288 | case Opt_tcp: | |
1289 | mnt->flags |= NFS_MOUNT_TCP; | |
0896a725 | 1290 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1291 | break; |
2cf7ff7a TT |
1292 | case Opt_rdma: |
1293 | mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ | |
1294 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 1295 | xprt_load_transport(p); |
2cf7ff7a | 1296 | break; |
bf0fd768 CL |
1297 | case Opt_acl: |
1298 | mnt->flags &= ~NFS_MOUNT_NOACL; | |
1299 | break; | |
1300 | case Opt_noacl: | |
1301 | mnt->flags |= NFS_MOUNT_NOACL; | |
1302 | break; | |
1303 | case Opt_rdirplus: | |
1304 | mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; | |
1305 | break; | |
1306 | case Opt_nordirplus: | |
1307 | mnt->flags |= NFS_MOUNT_NORDIRPLUS; | |
1308 | break; | |
75180df2 TM |
1309 | case Opt_sharecache: |
1310 | mnt->flags &= ~NFS_MOUNT_UNSHARED; | |
1311 | break; | |
1312 | case Opt_nosharecache: | |
1313 | mnt->flags |= NFS_MOUNT_UNSHARED; | |
1314 | break; | |
d740351b CL |
1315 | case Opt_resvport: |
1316 | mnt->flags &= ~NFS_MOUNT_NORESVPORT; | |
1317 | break; | |
1318 | case Opt_noresvport: | |
1319 | mnt->flags |= NFS_MOUNT_NORESVPORT; | |
1320 | break; | |
b797cac7 DH |
1321 | case Opt_fscache: |
1322 | mnt->options |= NFS_OPTION_FSCACHE; | |
1323 | kfree(mnt->fscache_uniq); | |
1324 | mnt->fscache_uniq = NULL; | |
1325 | break; | |
1326 | case Opt_nofscache: | |
1327 | mnt->options &= ~NFS_OPTION_FSCACHE; | |
1328 | kfree(mnt->fscache_uniq); | |
1329 | mnt->fscache_uniq = NULL; | |
1330 | break; | |
89652617 CL |
1331 | case Opt_migration: |
1332 | mnt->options |= NFS_OPTION_MIGRATION; | |
1333 | break; | |
1334 | case Opt_nomigration: | |
f02fee22 | 1335 | mnt->options &= ~NFS_OPTION_MIGRATION; |
89652617 | 1336 | break; |
bf0fd768 | 1337 | |
f45663ce CL |
1338 | /* |
1339 | * options that take numeric values | |
1340 | */ | |
bf0fd768 | 1341 | case Opt_port: |
c5cb09b6 RL |
1342 | if (nfs_get_option_ul(args, &option) || |
1343 | option > USHRT_MAX) | |
d23c45fd CL |
1344 | goto out_invalid_value; |
1345 | mnt->nfs_server.port = option; | |
bf0fd768 CL |
1346 | break; |
1347 | case Opt_rsize: | |
c5cb09b6 | 1348 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1349 | goto out_invalid_value; |
1350 | mnt->rsize = option; | |
bf0fd768 CL |
1351 | break; |
1352 | case Opt_wsize: | |
c5cb09b6 | 1353 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1354 | goto out_invalid_value; |
1355 | mnt->wsize = option; | |
bf0fd768 CL |
1356 | break; |
1357 | case Opt_bsize: | |
c5cb09b6 | 1358 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1359 | goto out_invalid_value; |
1360 | mnt->bsize = option; | |
bf0fd768 CL |
1361 | break; |
1362 | case Opt_timeo: | |
a956beda | 1363 | if (nfs_get_option_ul_bound(args, &option, 1, INT_MAX)) |
d23c45fd CL |
1364 | goto out_invalid_value; |
1365 | mnt->timeo = option; | |
bf0fd768 CL |
1366 | break; |
1367 | case Opt_retrans: | |
a956beda | 1368 | if (nfs_get_option_ul_bound(args, &option, 0, INT_MAX)) |
d23c45fd CL |
1369 | goto out_invalid_value; |
1370 | mnt->retrans = option; | |
bf0fd768 CL |
1371 | break; |
1372 | case Opt_acregmin: | |
c5cb09b6 | 1373 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1374 | goto out_invalid_value; |
1375 | mnt->acregmin = option; | |
bf0fd768 CL |
1376 | break; |
1377 | case Opt_acregmax: | |
c5cb09b6 | 1378 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1379 | goto out_invalid_value; |
1380 | mnt->acregmax = option; | |
bf0fd768 CL |
1381 | break; |
1382 | case Opt_acdirmin: | |
c5cb09b6 | 1383 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1384 | goto out_invalid_value; |
1385 | mnt->acdirmin = option; | |
bf0fd768 CL |
1386 | break; |
1387 | case Opt_acdirmax: | |
c5cb09b6 | 1388 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1389 | goto out_invalid_value; |
1390 | mnt->acdirmax = option; | |
bf0fd768 CL |
1391 | break; |
1392 | case Opt_actimeo: | |
c5cb09b6 | 1393 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1394 | goto out_invalid_value; |
1395 | mnt->acregmin = mnt->acregmax = | |
1396 | mnt->acdirmin = mnt->acdirmax = option; | |
bf0fd768 CL |
1397 | break; |
1398 | case Opt_namelen: | |
c5cb09b6 | 1399 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1400 | goto out_invalid_value; |
1401 | mnt->namlen = option; | |
bf0fd768 CL |
1402 | break; |
1403 | case Opt_mountport: | |
c5cb09b6 RL |
1404 | if (nfs_get_option_ul(args, &option) || |
1405 | option > USHRT_MAX) | |
d23c45fd CL |
1406 | goto out_invalid_value; |
1407 | mnt->mount_server.port = option; | |
bf0fd768 | 1408 | break; |
bf0fd768 | 1409 | case Opt_mountvers: |
c5cb09b6 | 1410 | if (nfs_get_option_ul(args, &option) || |
f45663ce | 1411 | option < NFS_MNT_VERSION || |
d23c45fd CL |
1412 | option > NFS_MNT3_VERSION) |
1413 | goto out_invalid_value; | |
1414 | mnt->mount_server.version = option; | |
bf0fd768 | 1415 | break; |
3fd5be9e | 1416 | case Opt_minorversion: |
c5cb09b6 | 1417 | if (nfs_get_option_ul(args, &option)) |
f3f4f4ed CL |
1418 | goto out_invalid_value; |
1419 | if (option > NFS4_MAX_MINOR_VERSION) | |
1420 | goto out_invalid_value; | |
1421 | mnt->minorversion = option; | |
3fd5be9e | 1422 | break; |
bf0fd768 | 1423 | |
f45663ce CL |
1424 | /* |
1425 | * options that take text values | |
1426 | */ | |
0d71b058 TM |
1427 | case Opt_nfsvers: |
1428 | string = match_strdup(args); | |
1429 | if (string == NULL) | |
1430 | goto out_nomem; | |
1431 | rc = nfs_parse_version_string(string, mnt, args); | |
1432 | kfree(string); | |
1433 | if (!rc) | |
1434 | goto out_invalid_value; | |
1435 | break; | |
bf0fd768 CL |
1436 | case Opt_sec: |
1437 | string = match_strdup(args); | |
1438 | if (string == NULL) | |
1439 | goto out_nomem; | |
01060c89 | 1440 | rc = nfs_parse_security_flavors(string, mnt); |
bf0fd768 | 1441 | kfree(string); |
f45663ce | 1442 | if (!rc) { |
f45663ce CL |
1443 | dfprintk(MOUNT, "NFS: unrecognized " |
1444 | "security flavor\n"); | |
d23c45fd | 1445 | return 0; |
f45663ce | 1446 | } |
bf0fd768 CL |
1447 | break; |
1448 | case Opt_proto: | |
1449 | string = match_strdup(args); | |
1450 | if (string == NULL) | |
1451 | goto out_nomem; | |
1452 | token = match_token(string, | |
1453 | nfs_xprt_protocol_tokens, args); | |
bf0fd768 | 1454 | |
ee671b01 | 1455 | protofamily = AF_INET; |
bf0fd768 | 1456 | switch (token) { |
ee671b01 JL |
1457 | case Opt_xprt_udp6: |
1458 | protofamily = AF_INET6; | |
fd53dde8 | 1459 | /* fall through */ |
fdb66ff4 | 1460 | case Opt_xprt_udp: |
bf0fd768 | 1461 | mnt->flags &= ~NFS_MOUNT_TCP; |
0896a725 | 1462 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 | 1463 | break; |
ee671b01 JL |
1464 | case Opt_xprt_tcp6: |
1465 | protofamily = AF_INET6; | |
fd53dde8 | 1466 | /* fall through */ |
fdb66ff4 | 1467 | case Opt_xprt_tcp: |
bf0fd768 | 1468 | mnt->flags |= NFS_MOUNT_TCP; |
0896a725 | 1469 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1470 | break; |
181342c5 SM |
1471 | case Opt_xprt_rdma6: |
1472 | protofamily = AF_INET6; | |
fd53dde8 | 1473 | /* fall through */ |
2cf7ff7a TT |
1474 | case Opt_xprt_rdma: |
1475 | /* vector side protocols to TCP */ | |
1476 | mnt->flags |= NFS_MOUNT_TCP; | |
1477 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 1478 | xprt_load_transport(string); |
2cf7ff7a | 1479 | break; |
bf0fd768 | 1480 | default: |
f45663ce CL |
1481 | dfprintk(MOUNT, "NFS: unrecognized " |
1482 | "transport protocol\n"); | |
4223a4a1 | 1483 | kfree(string); |
d23c45fd | 1484 | return 0; |
bf0fd768 | 1485 | } |
c5cb09b6 | 1486 | kfree(string); |
bf0fd768 CL |
1487 | break; |
1488 | case Opt_mountproto: | |
1489 | string = match_strdup(args); | |
1490 | if (string == NULL) | |
1491 | goto out_nomem; | |
1492 | token = match_token(string, | |
1493 | nfs_xprt_protocol_tokens, args); | |
d508afb4 | 1494 | kfree(string); |
bf0fd768 | 1495 | |
ee671b01 | 1496 | mountfamily = AF_INET; |
bf0fd768 | 1497 | switch (token) { |
ee671b01 JL |
1498 | case Opt_xprt_udp6: |
1499 | mountfamily = AF_INET6; | |
fd53dde8 | 1500 | /* fall through */ |
fdb66ff4 | 1501 | case Opt_xprt_udp: |
0896a725 | 1502 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 | 1503 | break; |
ee671b01 JL |
1504 | case Opt_xprt_tcp6: |
1505 | mountfamily = AF_INET6; | |
fd53dde8 | 1506 | /* fall through */ |
fdb66ff4 | 1507 | case Opt_xprt_tcp: |
0896a725 | 1508 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1509 | break; |
2cf7ff7a | 1510 | case Opt_xprt_rdma: /* not used for side protocols */ |
bf0fd768 | 1511 | default: |
f45663ce CL |
1512 | dfprintk(MOUNT, "NFS: unrecognized " |
1513 | "transport protocol\n"); | |
d23c45fd | 1514 | return 0; |
bf0fd768 CL |
1515 | } |
1516 | break; | |
1517 | case Opt_addr: | |
1518 | string = match_strdup(args); | |
1519 | if (string == NULL) | |
1520 | goto out_nomem; | |
53a0b9c4 | 1521 | mnt->nfs_server.addrlen = |
b48e1278 | 1522 | rpc_pton(mnt->net, string, strlen(string), |
53a0b9c4 CL |
1523 | (struct sockaddr *) |
1524 | &mnt->nfs_server.address, | |
1525 | sizeof(mnt->nfs_server.address)); | |
bf0fd768 | 1526 | kfree(string); |
53a0b9c4 CL |
1527 | if (mnt->nfs_server.addrlen == 0) |
1528 | goto out_invalid_address; | |
bf0fd768 CL |
1529 | break; |
1530 | case Opt_clientaddr: | |
c5cb09b6 | 1531 | if (nfs_get_option_str(args, &mnt->client_address)) |
bf0fd768 | 1532 | goto out_nomem; |
bf0fd768 | 1533 | break; |
33832034 | 1534 | case Opt_mounthost: |
c5cb09b6 RL |
1535 | if (nfs_get_option_str(args, |
1536 | &mnt->mount_server.hostname)) | |
33832034 | 1537 | goto out_nomem; |
33832034 | 1538 | break; |
0ac83779 | 1539 | case Opt_mountaddr: |
bf0fd768 CL |
1540 | string = match_strdup(args); |
1541 | if (string == NULL) | |
1542 | goto out_nomem; | |
53a0b9c4 | 1543 | mnt->mount_server.addrlen = |
b48e1278 | 1544 | rpc_pton(mnt->net, string, strlen(string), |
53a0b9c4 CL |
1545 | (struct sockaddr *) |
1546 | &mnt->mount_server.address, | |
1547 | sizeof(mnt->mount_server.address)); | |
bf0fd768 | 1548 | kfree(string); |
53a0b9c4 CL |
1549 | if (mnt->mount_server.addrlen == 0) |
1550 | goto out_invalid_address; | |
bf0fd768 | 1551 | break; |
7973c1f1 TM |
1552 | case Opt_lookupcache: |
1553 | string = match_strdup(args); | |
1554 | if (string == NULL) | |
1555 | goto out_nomem; | |
1556 | token = match_token(string, | |
1557 | nfs_lookupcache_tokens, args); | |
1558 | kfree(string); | |
1559 | switch (token) { | |
1560 | case Opt_lookupcache_all: | |
1561 | mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); | |
1562 | break; | |
1563 | case Opt_lookupcache_positive: | |
1564 | mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1565 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; | |
1566 | break; | |
1567 | case Opt_lookupcache_none: | |
1568 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1569 | break; | |
1570 | default: | |
7973c1f1 TM |
1571 | dfprintk(MOUNT, "NFS: invalid " |
1572 | "lookupcache argument\n"); | |
d23c45fd | 1573 | return 0; |
7973c1f1 TM |
1574 | }; |
1575 | break; | |
a6d5ff64 | 1576 | case Opt_fscache_uniq: |
c5cb09b6 | 1577 | if (nfs_get_option_str(args, &mnt->fscache_uniq)) |
a6d5ff64 | 1578 | goto out_nomem; |
a6d5ff64 CL |
1579 | mnt->options |= NFS_OPTION_FSCACHE; |
1580 | break; | |
5eebde23 SJ |
1581 | case Opt_local_lock: |
1582 | string = match_strdup(args); | |
1583 | if (string == NULL) | |
1584 | goto out_nomem; | |
1585 | token = match_token(string, nfs_local_lock_tokens, | |
1586 | args); | |
1587 | kfree(string); | |
1588 | switch (token) { | |
1589 | case Opt_local_lock_all: | |
1590 | mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | | |
1591 | NFS_MOUNT_LOCAL_FCNTL); | |
1592 | break; | |
1593 | case Opt_local_lock_flock: | |
1594 | mnt->flags |= NFS_MOUNT_LOCAL_FLOCK; | |
1595 | break; | |
1596 | case Opt_local_lock_posix: | |
1597 | mnt->flags |= NFS_MOUNT_LOCAL_FCNTL; | |
1598 | break; | |
1599 | case Opt_local_lock_none: | |
1600 | mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | | |
1601 | NFS_MOUNT_LOCAL_FCNTL); | |
1602 | break; | |
1603 | default: | |
1604 | dfprintk(MOUNT, "NFS: invalid " | |
1605 | "local_lock argument\n"); | |
1606 | return 0; | |
1607 | }; | |
1608 | break; | |
bf0fd768 | 1609 | |
f45663ce CL |
1610 | /* |
1611 | * Special options | |
1612 | */ | |
1613 | case Opt_sloppy: | |
1614 | sloppy = 1; | |
1615 | dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); | |
1616 | break; | |
bf0fd768 CL |
1617 | case Opt_userspace: |
1618 | case Opt_deprecated: | |
d33e4dfe CL |
1619 | dfprintk(MOUNT, "NFS: ignoring mount option " |
1620 | "'%s'\n", p); | |
bf0fd768 CL |
1621 | break; |
1622 | ||
1623 | default: | |
d23c45fd | 1624 | invalid_option = 1; |
f45663ce CL |
1625 | dfprintk(MOUNT, "NFS: unrecognized mount option " |
1626 | "'%s'\n", p); | |
bf0fd768 CL |
1627 | } |
1628 | } | |
1629 | ||
d23c45fd CL |
1630 | if (!sloppy && invalid_option) |
1631 | return 0; | |
1632 | ||
571b7554 WAA |
1633 | if (mnt->minorversion && mnt->version != 4) |
1634 | goto out_minorversion_mismatch; | |
1635 | ||
89652617 | 1636 | if (mnt->options & NFS_OPTION_MIGRATION && |
9e08ef1a | 1637 | (mnt->version != 4 || mnt->minorversion != 0)) |
89652617 CL |
1638 | goto out_migration_misuse; |
1639 | ||
ee671b01 JL |
1640 | /* |
1641 | * verify that any proto=/mountproto= options match the address | |
1856b225 | 1642 | * families in the addr=/mountaddr= options. |
ee671b01 JL |
1643 | */ |
1644 | if (protofamily != AF_UNSPEC && | |
1645 | protofamily != mnt->nfs_server.address.ss_family) | |
1646 | goto out_proto_mismatch; | |
1647 | ||
1648 | if (mountfamily != AF_UNSPEC) { | |
1649 | if (mnt->mount_server.addrlen) { | |
1650 | if (mountfamily != mnt->mount_server.address.ss_family) | |
1651 | goto out_mountproto_mismatch; | |
1652 | } else { | |
1653 | if (mountfamily != mnt->nfs_server.address.ss_family) | |
1654 | goto out_mountproto_mismatch; | |
1655 | } | |
1656 | } | |
1657 | ||
bf0fd768 CL |
1658 | return 1; |
1659 | ||
ee671b01 JL |
1660 | out_mountproto_mismatch: |
1661 | printk(KERN_INFO "NFS: mount server address does not match mountproto= " | |
1662 | "option\n"); | |
1663 | return 0; | |
1664 | out_proto_mismatch: | |
1665 | printk(KERN_INFO "NFS: server address does not match proto= option\n"); | |
1666 | return 0; | |
53a0b9c4 CL |
1667 | out_invalid_address: |
1668 | printk(KERN_INFO "NFS: bad IP address specified: %s\n", p); | |
1669 | return 0; | |
d23c45fd | 1670 | out_invalid_value: |
53a0b9c4 | 1671 | printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); |
d23c45fd | 1672 | return 0; |
571b7554 WAA |
1673 | out_minorversion_mismatch: |
1674 | printk(KERN_INFO "NFS: mount option vers=%u does not support " | |
1675 | "minorversion=%u\n", mnt->version, mnt->minorversion); | |
1676 | return 0; | |
89652617 CL |
1677 | out_migration_misuse: |
1678 | printk(KERN_INFO | |
1679 | "NFS: 'migration' not supported for this NFS version\n"); | |
1680 | return 0; | |
bf0fd768 CL |
1681 | out_nomem: |
1682 | printk(KERN_INFO "NFS: not enough memory to parse option\n"); | |
1683 | return 0; | |
f9c3a380 | 1684 | out_security_failure: |
f9c3a380 EP |
1685 | printk(KERN_INFO "NFS: security options invalid: %d\n", rc); |
1686 | return 0; | |
bf0fd768 CL |
1687 | } |
1688 | ||
ec88f28d | 1689 | /* |
4d4b69dd WAA |
1690 | * Ensure that a specified authtype in args->auth_info is supported by |
1691 | * the server. Returns 0 and sets args->selected_flavor if it's ok, and | |
1692 | * -EACCES if not. | |
ec88f28d | 1693 | */ |
4d4b69dd | 1694 | static int nfs_verify_authflavors(struct nfs_parsed_mount_data *args, |
9111c95b | 1695 | rpc_authflavor_t *server_authlist, unsigned int count) |
ec88f28d | 1696 | { |
4d4b69dd | 1697 | rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; |
53a75f22 | 1698 | bool found_auth_null = false; |
9111c95b | 1699 | unsigned int i; |
4580a92d | 1700 | |
d497ab97 WAA |
1701 | /* |
1702 | * If the sec= mount option is used, the specified flavor or AUTH_NULL | |
1703 | * must be in the list returned by the server. | |
1704 | * | |
1705 | * AUTH_NULL has a special meaning when it's in the server list - it | |
1706 | * means that the server will ignore the rpc creds, so any flavor | |
e68fd7c8 | 1707 | * can be used but still use the sec= that was specified. |
53a75f22 CL |
1708 | * |
1709 | * Note also that the MNT procedure in MNTv1 does not return a list | |
1710 | * of supported security flavors. In this case, nfs_mount() fabricates | |
1711 | * a security flavor list containing just AUTH_NULL. | |
d497ab97 | 1712 | */ |
4580a92d | 1713 | for (i = 0; i < count; i++) { |
4d4b69dd WAA |
1714 | flavor = server_authlist[i]; |
1715 | ||
e68fd7c8 | 1716 | if (nfs_auth_info_match(&args->auth_info, flavor)) |
9111c95b | 1717 | goto out; |
e68fd7c8 SD |
1718 | |
1719 | if (flavor == RPC_AUTH_NULL) | |
53a75f22 | 1720 | found_auth_null = true; |
e68fd7c8 SD |
1721 | } |
1722 | ||
53a75f22 CL |
1723 | if (found_auth_null) { |
1724 | flavor = args->auth_info.flavors[0]; | |
e68fd7c8 | 1725 | goto out; |
4580a92d | 1726 | } |
ec88f28d | 1727 | |
4d4b69dd WAA |
1728 | dfprintk(MOUNT, |
1729 | "NFS: specified auth flavors not supported by server\n"); | |
9111c95b | 1730 | return -EACCES; |
d497ab97 | 1731 | |
4580a92d | 1732 | out: |
4d4b69dd | 1733 | args->selected_flavor = flavor; |
a3f73c27 | 1734 | dfprintk(MOUNT, "NFS: using auth flavor %u\n", args->selected_flavor); |
d497ab97 | 1735 | return 0; |
ec88f28d CL |
1736 | } |
1737 | ||
0076d7b7 CL |
1738 | /* |
1739 | * Use the remote server's MOUNT service to request the NFS file handle | |
1740 | * corresponding to the provided path. | |
1741 | */ | |
486aa699 | 1742 | static int nfs_request_mount(struct nfs_parsed_mount_data *args, |
294ae81d JL |
1743 | struct nfs_fh *root_fh, |
1744 | rpc_authflavor_t *server_authlist, | |
1745 | unsigned int *server_authlist_len) | |
0076d7b7 | 1746 | { |
c5d120f8 CL |
1747 | struct nfs_mount_request request = { |
1748 | .sap = (struct sockaddr *) | |
1749 | &args->mount_server.address, | |
1750 | .dirpath = args->nfs_server.export_path, | |
1751 | .protocol = args->mount_server.protocol, | |
1752 | .fh = root_fh, | |
50a737f8 | 1753 | .noresvport = args->flags & NFS_MOUNT_NORESVPORT, |
294ae81d | 1754 | .auth_flav_len = server_authlist_len, |
ec88f28d | 1755 | .auth_flavs = server_authlist, |
6d59b8d5 | 1756 | .net = args->net, |
c5d120f8 | 1757 | }; |
4c568017 | 1758 | int status; |
0076d7b7 CL |
1759 | |
1760 | if (args->mount_server.version == 0) { | |
8a6e5deb TM |
1761 | switch (args->version) { |
1762 | default: | |
1763 | args->mount_server.version = NFS_MNT3_VERSION; | |
1764 | break; | |
1765 | case 2: | |
1766 | args->mount_server.version = NFS_MNT_VERSION; | |
1767 | } | |
0076d7b7 | 1768 | } |
c5d120f8 | 1769 | request.version = args->mount_server.version; |
0076d7b7 | 1770 | |
33832034 | 1771 | if (args->mount_server.hostname) |
c5d120f8 | 1772 | request.hostname = args->mount_server.hostname; |
33832034 | 1773 | else |
c5d120f8 | 1774 | request.hostname = args->nfs_server.hostname; |
33832034 | 1775 | |
0076d7b7 CL |
1776 | /* |
1777 | * Construct the mount server's address. | |
1778 | */ | |
4c568017 | 1779 | if (args->mount_server.address.ss_family == AF_UNSPEC) { |
c5d120f8 | 1780 | memcpy(request.sap, &args->nfs_server.address, |
4c568017 CL |
1781 | args->nfs_server.addrlen); |
1782 | args->mount_server.addrlen = args->nfs_server.addrlen; | |
1783 | } | |
c5d120f8 | 1784 | request.salen = args->mount_server.addrlen; |
f5855fec | 1785 | nfs_set_port(request.sap, &args->mount_server.port, 0); |
0076d7b7 CL |
1786 | |
1787 | /* | |
1788 | * Now ask the mount server to map our export path | |
1789 | * to a file handle. | |
1790 | */ | |
c5d120f8 | 1791 | status = nfs_mount(&request); |
ec88f28d CL |
1792 | if (status != 0) { |
1793 | dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n", | |
1794 | request.hostname, status); | |
1795 | return status; | |
1796 | } | |
0076d7b7 | 1797 | |
9111c95b | 1798 | return 0; |
0076d7b7 CL |
1799 | } |
1800 | ||
d17540c6 JL |
1801 | static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_info, |
1802 | struct nfs_subversion *nfs_mod) | |
1803 | { | |
1804 | int status; | |
9111c95b JL |
1805 | unsigned int i; |
1806 | bool tried_auth_unix = false; | |
1807 | bool auth_null_in_list = false; | |
1808 | struct nfs_server *server = ERR_PTR(-EACCES); | |
294ae81d JL |
1809 | struct nfs_parsed_mount_data *args = mount_info->parsed; |
1810 | rpc_authflavor_t authlist[NFS_MAX_SECFLAVORS]; | |
1811 | unsigned int authlist_len = ARRAY_SIZE(authlist); | |
d17540c6 | 1812 | |
294ae81d JL |
1813 | status = nfs_request_mount(args, mount_info->mntfh, authlist, |
1814 | &authlist_len); | |
d17540c6 JL |
1815 | if (status) |
1816 | return ERR_PTR(status); | |
1817 | ||
9111c95b JL |
1818 | /* |
1819 | * Was a sec= authflavor specified in the options? First, verify | |
1820 | * whether the server supports it, and then just try to use it if so. | |
1821 | */ | |
a3f73c27 | 1822 | if (args->auth_info.flavor_len > 0) { |
4d4b69dd | 1823 | status = nfs_verify_authflavors(args, authlist, authlist_len); |
a3f73c27 WAA |
1824 | dfprintk(MOUNT, "NFS: using auth flavor %u\n", |
1825 | args->selected_flavor); | |
9111c95b JL |
1826 | if (status) |
1827 | return ERR_PTR(status); | |
1828 | return nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); | |
1829 | } | |
1830 | ||
1831 | /* | |
1832 | * No sec= option was provided. RFC 2623, section 2.7 suggests we | |
1833 | * SHOULD prefer the flavor listed first. However, some servers list | |
1834 | * AUTH_NULL first. Avoid ever choosing AUTH_NULL. | |
1835 | */ | |
1836 | for (i = 0; i < authlist_len; ++i) { | |
1837 | rpc_authflavor_t flavor; | |
1838 | struct rpcsec_gss_info info; | |
1839 | ||
1840 | flavor = authlist[i]; | |
1841 | switch (flavor) { | |
1842 | case RPC_AUTH_UNIX: | |
1843 | tried_auth_unix = true; | |
1844 | break; | |
1845 | case RPC_AUTH_NULL: | |
1846 | auth_null_in_list = true; | |
1847 | continue; | |
1848 | default: | |
1849 | if (rpcauth_get_gssinfo(flavor, &info) != 0) | |
1850 | continue; | |
1851 | /* Fallthrough */ | |
1852 | } | |
1853 | dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", flavor); | |
a3f73c27 | 1854 | args->selected_flavor = flavor; |
9111c95b JL |
1855 | server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); |
1856 | if (!IS_ERR(server)) | |
1857 | return server; | |
1858 | } | |
1859 | ||
1860 | /* | |
1861 | * Nothing we tried so far worked. At this point, give up if we've | |
1862 | * already tried AUTH_UNIX or if the server's list doesn't contain | |
1863 | * AUTH_NULL | |
1864 | */ | |
1865 | if (tried_auth_unix || !auth_null_in_list) | |
1866 | return server; | |
1867 | ||
1868 | /* Last chance! Try AUTH_UNIX */ | |
1869 | dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", RPC_AUTH_UNIX); | |
a3f73c27 | 1870 | args->selected_flavor = RPC_AUTH_UNIX; |
d17540c6 JL |
1871 | return nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); |
1872 | } | |
1873 | ||
ff9099f2 BS |
1874 | struct dentry *nfs_try_mount(int flags, const char *dev_name, |
1875 | struct nfs_mount_info *mount_info, | |
1876 | struct nfs_subversion *nfs_mod) | |
486aa699 | 1877 | { |
486aa699 BS |
1878 | struct nfs_server *server; |
1879 | ||
d17540c6 JL |
1880 | if (mount_info->parsed->need_mount) |
1881 | server = nfs_try_mount_request(mount_info, nfs_mod); | |
1882 | else | |
1883 | server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); | |
486aa699 | 1884 | |
486aa699 BS |
1885 | if (IS_ERR(server)) |
1886 | return ERR_CAST(server); | |
1887 | ||
ab7017a3 | 1888 | return nfs_fs_mount_common(server, flags, dev_name, mount_info, nfs_mod); |
486aa699 | 1889 | } |
ddda8e0a | 1890 | EXPORT_SYMBOL_GPL(nfs_try_mount); |
486aa699 | 1891 | |
c12bacec RL |
1892 | /* |
1893 | * Split "dev_name" into "hostname:export_path". | |
1894 | * | |
1895 | * The leftmost colon demarks the split between the server's hostname | |
1896 | * and the export path. If the hostname starts with a left square | |
1897 | * bracket, then it may contain colons. | |
1898 | * | |
1899 | * Note: caller frees hostname and export path, even on error. | |
1900 | */ | |
1901 | static int nfs_parse_devname(const char *dev_name, | |
1902 | char **hostname, size_t maxnamlen, | |
1903 | char **export_path, size_t maxpathlen) | |
dc045898 CL |
1904 | { |
1905 | size_t len; | |
c12bacec | 1906 | char *end; |
dc045898 | 1907 | |
80ff0017 YL |
1908 | if (unlikely(!dev_name || !*dev_name)) { |
1909 | dfprintk(MOUNT, "NFS: device name not specified\n"); | |
1910 | return -EINVAL; | |
1911 | } | |
1912 | ||
c12bacec RL |
1913 | /* Is the host name protected with square brakcets? */ |
1914 | if (*dev_name == '[') { | |
1915 | end = strchr(++dev_name, ']'); | |
1916 | if (end == NULL || end[1] != ':') | |
dc045898 | 1917 | goto out_bad_devname; |
dc045898 | 1918 | |
c12bacec RL |
1919 | len = end - dev_name; |
1920 | end++; | |
1921 | } else { | |
1922 | char *comma; | |
dc045898 | 1923 | |
c12bacec RL |
1924 | end = strchr(dev_name, ':'); |
1925 | if (end == NULL) | |
1926 | goto out_bad_devname; | |
1927 | len = end - dev_name; | |
d1aa0825 | 1928 | |
c12bacec RL |
1929 | /* kill possible hostname list: not supported */ |
1930 | comma = strchr(dev_name, ','); | |
1931 | if (comma != NULL && comma < end) | |
40cc394b | 1932 | len = comma - dev_name; |
c12bacec | 1933 | } |
d1aa0825 | 1934 | |
d1aa0825 CL |
1935 | if (len > maxnamlen) |
1936 | goto out_hostname; | |
1937 | ||
1938 | /* N.B. caller will free nfs_server.hostname in all cases */ | |
c12bacec | 1939 | *hostname = kstrndup(dev_name, len, GFP_KERNEL); |
d1aa0825 CL |
1940 | if (*hostname == NULL) |
1941 | goto out_nomem; | |
c12bacec | 1942 | len = strlen(++end); |
d1aa0825 CL |
1943 | if (len > maxpathlen) |
1944 | goto out_path; | |
1945 | *export_path = kstrndup(end, len, GFP_KERNEL); | |
1946 | if (!*export_path) | |
1947 | goto out_nomem; | |
1948 | ||
c12bacec | 1949 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path); |
d1aa0825 CL |
1950 | return 0; |
1951 | ||
1952 | out_bad_devname: | |
1953 | dfprintk(MOUNT, "NFS: device name not in host:path format\n"); | |
1954 | return -EINVAL; | |
1955 | ||
1956 | out_nomem: | |
1957 | dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); | |
1958 | return -ENOMEM; | |
1959 | ||
1960 | out_hostname: | |
1961 | dfprintk(MOUNT, "NFS: server hostname too long\n"); | |
1962 | return -ENAMETOOLONG; | |
1963 | ||
1964 | out_path: | |
1965 | dfprintk(MOUNT, "NFS: export pathname too long\n"); | |
1966 | return -ENAMETOOLONG; | |
1967 | } | |
1968 | ||
f7b422b1 | 1969 | /* |
54ceac45 DH |
1970 | * Validate the NFS2/NFS3 mount data |
1971 | * - fills in the mount root filehandle | |
136d558c CL |
1972 | * |
1973 | * For option strings, user space handles the following behaviors: | |
1974 | * | |
1975 | * + DNS: mapping server host name to IP address ("addr=" option) | |
1976 | * | |
1977 | * + failure mode: how to behave if a mount request can't be handled | |
1978 | * immediately ("fg/bg" option) | |
1979 | * | |
1980 | * + retry: how often to retry a mount request ("retry=" option) | |
1981 | * | |
1982 | * + breaking back: trying proto=udp after proto=tcp, v2 after v3, | |
1983 | * mountproto=tcp after mountproto=udp, and so on | |
f7b422b1 | 1984 | */ |
d72c727c BS |
1985 | static int nfs23_validate_mount_data(void *options, |
1986 | struct nfs_parsed_mount_data *args, | |
1987 | struct nfs_fh *mntfh, | |
1988 | const char *dev_name) | |
f7b422b1 | 1989 | { |
2283f8d6 | 1990 | struct nfs_mount_data *data = (struct nfs_mount_data *)options; |
4cfd74fc | 1991 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; |
74c98811 | 1992 | int extra_flags = NFS_MOUNT_LEGACY_INTERFACE; |
136d558c | 1993 | |
5df36e78 CL |
1994 | if (data == NULL) |
1995 | goto out_no_data; | |
f7b422b1 | 1996 | |
c5afc8da | 1997 | args->version = NFS_DEFAULT_VERSION; |
54ceac45 | 1998 | switch (data->version) { |
5df36e78 | 1999 | case 1: |
fd53dde8 | 2000 | data->namlen = 0; /* fall through */ |
5df36e78 | 2001 | case 2: |
fd53dde8 | 2002 | data->bsize = 0; /* fall through */ |
5df36e78 CL |
2003 | case 3: |
2004 | if (data->flags & NFS_MOUNT_VER3) | |
2005 | goto out_no_v3; | |
2006 | data->root.size = NFS2_FHSIZE; | |
2007 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
74c98811 TM |
2008 | /* Turn off security negotiation */ |
2009 | extra_flags |= NFS_MOUNT_SECFLAVOUR; | |
fd53dde8 | 2010 | /* fall through */ |
5df36e78 CL |
2011 | case 4: |
2012 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
2013 | goto out_no_sec; | |
fd53dde8 | 2014 | /* fall through */ |
5df36e78 CL |
2015 | case 5: |
2016 | memset(data->context, 0, sizeof(data->context)); | |
fd53dde8 | 2017 | /* fall through */ |
5df36e78 | 2018 | case 6: |
b7e24457 TM |
2019 | if (data->flags & NFS_MOUNT_VER3) { |
2020 | if (data->root.size > NFS3_FHSIZE || data->root.size == 0) | |
2021 | goto out_invalid_fh; | |
5df36e78 | 2022 | mntfh->size = data->root.size; |
764302cc CL |
2023 | args->version = 3; |
2024 | } else { | |
5df36e78 | 2025 | mntfh->size = NFS2_FHSIZE; |
764302cc CL |
2026 | args->version = 2; |
2027 | } | |
5df36e78 | 2028 | |
5df36e78 CL |
2029 | |
2030 | memcpy(mntfh->data, data->root.data, mntfh->size); | |
2031 | if (mntfh->size < sizeof(mntfh->data)) | |
2032 | memset(mntfh->data + mntfh->size, 0, | |
2033 | sizeof(mntfh->data) - mntfh->size); | |
6e88e061 | 2034 | |
2283f8d6 TT |
2035 | /* |
2036 | * Translate to nfs_parsed_mount_data, which nfs_fill_super | |
2037 | * can deal with. | |
2038 | */ | |
ff3525a5 | 2039 | args->flags = data->flags & NFS_MOUNT_FLAGMASK; |
74c98811 | 2040 | args->flags |= extra_flags; |
2283f8d6 TT |
2041 | args->rsize = data->rsize; |
2042 | args->wsize = data->wsize; | |
2283f8d6 TT |
2043 | args->timeo = data->timeo; |
2044 | args->retrans = data->retrans; | |
2045 | args->acregmin = data->acregmin; | |
2046 | args->acregmax = data->acregmax; | |
2047 | args->acdirmin = data->acdirmin; | |
2048 | args->acdirmax = data->acdirmax; | |
b72e4f42 | 2049 | args->need_mount = false; |
4c568017 | 2050 | |
4cfd74fc | 2051 | memcpy(sap, &data->addr, sizeof(data->addr)); |
4c568017 | 2052 | args->nfs_server.addrlen = sizeof(data->addr); |
872ece86 | 2053 | args->nfs_server.port = ntohs(data->addr.sin_port); |
7c2bd9a3 TH |
2054 | if (sap->sa_family != AF_INET || |
2055 | !nfs_verify_server_address(sap)) | |
4c568017 CL |
2056 | goto out_no_address; |
2057 | ||
2283f8d6 | 2058 | if (!(data->flags & NFS_MOUNT_TCP)) |
0896a725 | 2059 | args->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
2283f8d6 TT |
2060 | /* N.B. caller will free nfs_server.hostname in all cases */ |
2061 | args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); | |
2062 | args->namlen = data->namlen; | |
2063 | args->bsize = data->bsize; | |
dd07c947 CL |
2064 | |
2065 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
a3f73c27 | 2066 | args->selected_flavor = data->pseudoflavor; |
74c98811 | 2067 | else |
a3f73c27 | 2068 | args->selected_flavor = RPC_AUTH_UNIX; |
63649bd7 CG |
2069 | if (!args->nfs_server.hostname) |
2070 | goto out_nomem; | |
f9c3a380 | 2071 | |
5eebde23 SJ |
2072 | if (!(data->flags & NFS_MOUNT_NONLM)) |
2073 | args->flags &= ~(NFS_MOUNT_LOCAL_FLOCK| | |
2074 | NFS_MOUNT_LOCAL_FCNTL); | |
2075 | else | |
2076 | args->flags |= (NFS_MOUNT_LOCAL_FLOCK| | |
2077 | NFS_MOUNT_LOCAL_FCNTL); | |
f9c3a380 EP |
2078 | /* |
2079 | * The legacy version 6 binary mount data from userspace has a | |
2080 | * field used only to transport selinux information into the | |
2081 | * the kernel. To continue to support that functionality we | |
2082 | * have a touch of selinux knowledge here in the NFS code. The | |
2083 | * userspace code converted context=blah to just blah so we are | |
2084 | * converting back to the full string selinux understands. | |
2085 | */ | |
2086 | if (data->context[0]){ | |
2087 | #ifdef CONFIG_SECURITY_SELINUX | |
2088 | int rc; | |
f9c3a380 | 2089 | data->context[NFS_MAX_CONTEXT_LEN] = '\0'; |
757cbe59 AV |
2090 | rc = security_add_mnt_opt("context", data->context, |
2091 | strlen(data->context), &args->lsm_opts); | |
f9c3a380 EP |
2092 | if (rc) |
2093 | return rc; | |
2094 | #else | |
2095 | return -EINVAL; | |
2096 | #endif | |
2097 | } | |
2098 | ||
5df36e78 | 2099 | break; |
b72e4f42 BS |
2100 | default: |
2101 | return NFS_TEXT_DATA; | |
f7b422b1 | 2102 | } |
54ceac45 | 2103 | |
5df36e78 | 2104 | return 0; |
f7b422b1 | 2105 | |
5df36e78 CL |
2106 | out_no_data: |
2107 | dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); | |
2108 | return -EINVAL; | |
54ceac45 | 2109 | |
5df36e78 CL |
2110 | out_no_v3: |
2111 | dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", | |
2112 | data->version); | |
2113 | return -EINVAL; | |
f7b422b1 | 2114 | |
5df36e78 CL |
2115 | out_no_sec: |
2116 | dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); | |
2117 | return -EINVAL; | |
2118 | ||
63649bd7 CG |
2119 | out_nomem: |
2120 | dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); | |
2121 | return -ENOMEM; | |
2122 | ||
5df36e78 CL |
2123 | out_no_address: |
2124 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); | |
2125 | return -EINVAL; | |
2126 | ||
2127 | out_invalid_fh: | |
2128 | dfprintk(MOUNT, "NFS: invalid root filehandle\n"); | |
2129 | return -EINVAL; | |
f7b422b1 DH |
2130 | } |
2131 | ||
89d77c8f | 2132 | #if IS_ENABLED(CONFIG_NFS_V4) |
d72c727c BS |
2133 | static int nfs_validate_mount_data(struct file_system_type *fs_type, |
2134 | void *options, | |
2135 | struct nfs_parsed_mount_data *args, | |
2136 | struct nfs_fh *mntfh, | |
2137 | const char *dev_name) | |
2138 | { | |
2139 | if (fs_type == &nfs_fs_type) | |
2140 | return nfs23_validate_mount_data(options, args, mntfh, dev_name); | |
2141 | return nfs4_validate_mount_data(options, args, dev_name); | |
2142 | } | |
2143 | #else | |
2144 | static int nfs_validate_mount_data(struct file_system_type *fs_type, | |
2145 | void *options, | |
2146 | struct nfs_parsed_mount_data *args, | |
2147 | struct nfs_fh *mntfh, | |
2148 | const char *dev_name) | |
2149 | { | |
2150 | return nfs23_validate_mount_data(options, args, mntfh, dev_name); | |
2151 | } | |
2152 | #endif | |
2153 | ||
b72e4f42 BS |
2154 | static int nfs_validate_text_mount_data(void *options, |
2155 | struct nfs_parsed_mount_data *args, | |
2156 | const char *dev_name) | |
2157 | { | |
2158 | int port = 0; | |
2159 | int max_namelen = PAGE_SIZE; | |
2160 | int max_pathlen = NFS_MAXPATHLEN; | |
2161 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; | |
2162 | ||
2163 | if (nfs_parse_mount_options((char *)options, args) == 0) | |
2164 | return -EINVAL; | |
2165 | ||
2166 | if (!nfs_verify_server_address(sap)) | |
2167 | goto out_no_address; | |
2168 | ||
2169 | if (args->version == 4) { | |
89d77c8f | 2170 | #if IS_ENABLED(CONFIG_NFS_V4) |
0dfbb5f0 CL |
2171 | if (args->nfs_server.protocol == XPRT_TRANSPORT_RDMA) |
2172 | port = NFS_RDMA_PORT; | |
2173 | else | |
2174 | port = NFS_PORT; | |
b72e4f42 BS |
2175 | max_namelen = NFS4_MAXNAMLEN; |
2176 | max_pathlen = NFS4_MAXPATHLEN; | |
2177 | nfs_validate_transport_protocol(args); | |
6da1a034 TM |
2178 | if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) |
2179 | goto out_invalid_transport_udp; | |
b72e4f42 BS |
2180 | nfs4_validate_mount_flags(args); |
2181 | #else | |
2182 | goto out_v4_not_compiled; | |
2183 | #endif /* CONFIG_NFS_V4 */ | |
0dfbb5f0 | 2184 | } else { |
b72e4f42 | 2185 | nfs_set_mount_transport_protocol(args); |
0dfbb5f0 CL |
2186 | if (args->nfs_server.protocol == XPRT_TRANSPORT_RDMA) |
2187 | port = NFS_RDMA_PORT; | |
2188 | } | |
b72e4f42 BS |
2189 | |
2190 | nfs_set_port(sap, &args->nfs_server.port, port); | |
2191 | ||
b72e4f42 BS |
2192 | return nfs_parse_devname(dev_name, |
2193 | &args->nfs_server.hostname, | |
2194 | max_namelen, | |
2195 | &args->nfs_server.export_path, | |
2196 | max_pathlen); | |
2197 | ||
89d77c8f | 2198 | #if !IS_ENABLED(CONFIG_NFS_V4) |
b72e4f42 BS |
2199 | out_v4_not_compiled: |
2200 | dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); | |
2201 | return -EPROTONOSUPPORT; | |
6da1a034 TM |
2202 | #else |
2203 | out_invalid_transport_udp: | |
2204 | dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); | |
2205 | return -EINVAL; | |
b72e4f42 BS |
2206 | #endif /* !CONFIG_NFS_V4 */ |
2207 | ||
2208 | out_no_address: | |
2209 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); | |
2210 | return -EINVAL; | |
b72e4f42 BS |
2211 | } |
2212 | ||
71a6ec8a | 2213 | #define NFS_REMOUNT_CMP_FLAGMASK ~(NFS_MOUNT_INTR \ |
c8e47028 SM |
2214 | | NFS_MOUNT_SECURE \ |
2215 | | NFS_MOUNT_TCP \ | |
2216 | | NFS_MOUNT_VER3 \ | |
2217 | | NFS_MOUNT_KERBEROS \ | |
2218 | | NFS_MOUNT_NONLM \ | |
2219 | | NFS_MOUNT_BROKEN_SUID \ | |
2220 | | NFS_MOUNT_STRICTLOCK \ | |
c8e47028 SM |
2221 | | NFS_MOUNT_LEGACY_INTERFACE) |
2222 | ||
71a6ec8a SM |
2223 | #define NFS_MOUNT_CMP_FLAGMASK (NFS_REMOUNT_CMP_FLAGMASK & \ |
2224 | ~(NFS_MOUNT_UNSHARED | NFS_MOUNT_NORESVPORT)) | |
2225 | ||
48b605f8 JL |
2226 | static int |
2227 | nfs_compare_remount_data(struct nfs_server *nfss, | |
2228 | struct nfs_parsed_mount_data *data) | |
2229 | { | |
71a6ec8a | 2230 | if ((data->flags ^ nfss->flags) & NFS_REMOUNT_CMP_FLAGMASK || |
48b605f8 JL |
2231 | data->rsize != nfss->rsize || |
2232 | data->wsize != nfss->wsize || | |
57acc40d JL |
2233 | data->version != nfss->nfs_client->rpc_ops->version || |
2234 | data->minorversion != nfss->nfs_client->cl_minorversion || | |
48b605f8 | 2235 | data->retrans != nfss->client->cl_timeout->to_retries || |
09a330f4 | 2236 | !nfs_auth_info_match(&data->auth_info, nfss->client->cl_auth->au_flavor) || |
48b605f8 JL |
2237 | data->acregmin != nfss->acregmin / HZ || |
2238 | data->acregmax != nfss->acregmax / HZ || | |
2239 | data->acdirmin != nfss->acdirmin / HZ || | |
2240 | data->acdirmax != nfss->acdirmax / HZ || | |
2241 | data->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) || | |
bcd2ea17 | 2242 | data->nfs_server.port != nfss->port || |
48b605f8 | 2243 | data->nfs_server.addrlen != nfss->nfs_client->cl_addrlen || |
a1be9eee SR |
2244 | !rpc_cmp_addr((struct sockaddr *)&data->nfs_server.address, |
2245 | (struct sockaddr *)&nfss->nfs_client->cl_addr)) | |
48b605f8 JL |
2246 | return -EINVAL; |
2247 | ||
2248 | return 0; | |
2249 | } | |
2250 | ||
fbdefd64 | 2251 | int |
48b605f8 JL |
2252 | nfs_remount(struct super_block *sb, int *flags, char *raw_data) |
2253 | { | |
2254 | int error; | |
2255 | struct nfs_server *nfss = sb->s_fs_info; | |
2256 | struct nfs_parsed_mount_data *data; | |
2257 | struct nfs_mount_data *options = (struct nfs_mount_data *)raw_data; | |
2258 | struct nfs4_mount_data *options4 = (struct nfs4_mount_data *)raw_data; | |
cd100725 | 2259 | u32 nfsvers = nfss->nfs_client->rpc_ops->version; |
48b605f8 | 2260 | |
02b9984d TT |
2261 | sync_filesystem(sb); |
2262 | ||
48b605f8 JL |
2263 | /* |
2264 | * Userspace mount programs that send binary options generally send | |
2265 | * them populated with default values. We have no way to know which | |
2266 | * ones were explicitly specified. Fall back to legacy behavior and | |
2267 | * just return success. | |
2268 | */ | |
31c94469 MZ |
2269 | if ((nfsvers == 4 && (!options4 || options4->version == 1)) || |
2270 | (nfsvers <= 3 && (!options || (options->version >= 1 && | |
2271 | options->version <= 6)))) | |
48b605f8 JL |
2272 | return 0; |
2273 | ||
6a0440e5 | 2274 | data = nfs_alloc_parsed_mount_data(); |
48b605f8 JL |
2275 | if (data == NULL) |
2276 | return -ENOMEM; | |
2277 | ||
2278 | /* fill out struct with values from existing mount */ | |
2279 | data->flags = nfss->flags; | |
2280 | data->rsize = nfss->rsize; | |
2281 | data->wsize = nfss->wsize; | |
2282 | data->retrans = nfss->client->cl_timeout->to_retries; | |
a3f73c27 | 2283 | data->selected_flavor = nfss->client->cl_auth->au_flavor; |
48b605f8 JL |
2284 | data->acregmin = nfss->acregmin / HZ; |
2285 | data->acregmax = nfss->acregmax / HZ; | |
2286 | data->acdirmin = nfss->acdirmin / HZ; | |
2287 | data->acdirmax = nfss->acdirmax / HZ; | |
2288 | data->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; | |
bcd2ea17 | 2289 | data->nfs_server.port = nfss->port; |
48b605f8 | 2290 | data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; |
57acc40d JL |
2291 | data->version = nfsvers; |
2292 | data->minorversion = nfss->nfs_client->cl_minorversion; | |
a914722f | 2293 | data->net = current->nsproxy->net_ns; |
48b605f8 JL |
2294 | memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr, |
2295 | data->nfs_server.addrlen); | |
2296 | ||
2297 | /* overwrite those values with any that were specified */ | |
1966903f JL |
2298 | error = -EINVAL; |
2299 | if (!nfs_parse_mount_options((char *)options, data)) | |
48b605f8 JL |
2300 | goto out; |
2301 | ||
26c4c170 JL |
2302 | /* |
2303 | * noac is a special case. It implies -o sync, but that's not | |
2304 | * necessarily reflected in the mtab options. do_remount_sb | |
1751e8a6 | 2305 | * will clear SB_SYNCHRONOUS if -o sync wasn't specified in the |
26c4c170 JL |
2306 | * remount options, so we have to explicitly reset it. |
2307 | */ | |
2308 | if (data->flags & NFS_MOUNT_NOAC) | |
1751e8a6 | 2309 | *flags |= SB_SYNCHRONOUS; |
26c4c170 | 2310 | |
48b605f8 JL |
2311 | /* compare new mount options with old ones */ |
2312 | error = nfs_compare_remount_data(nfss, data); | |
6a0440e5 | 2313 | if (!error) |
204cc0cc | 2314 | error = security_sb_remount(sb, data->lsm_opts); |
48b605f8 | 2315 | out: |
6a0440e5 | 2316 | nfs_free_parsed_mount_data(data); |
48b605f8 JL |
2317 | return error; |
2318 | } | |
89d77c8f | 2319 | EXPORT_SYMBOL_GPL(nfs_remount); |
48b605f8 | 2320 | |
f7b422b1 | 2321 | /* |
54ceac45 | 2322 | * Initialise the common bits of the superblock |
f7b422b1 | 2323 | */ |
4f253e1e | 2324 | static void nfs_initialise_sb(struct super_block *sb) |
f7b422b1 | 2325 | { |
54ceac45 | 2326 | struct nfs_server *server = NFS_SB(sb); |
5006a76c | 2327 | |
54ceac45 | 2328 | sb->s_magic = NFS_SUPER_MAGIC; |
f7b422b1 | 2329 | |
54ceac45 DH |
2330 | /* We probably want something more informative here */ |
2331 | snprintf(sb->s_id, sizeof(sb->s_id), | |
5a7c9eec | 2332 | "%u:%u", MAJOR(sb->s_dev), MINOR(sb->s_dev)); |
5006a76c | 2333 | |
54ceac45 DH |
2334 | if (sb->s_blocksize == 0) |
2335 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
2336 | &sb->s_blocksize_bits); | |
f7b422b1 | 2337 | |
54ceac45 | 2338 | nfs_super_set_maxbytes(sb, server->maxfilesize); |
f7b422b1 DH |
2339 | } |
2340 | ||
2341 | /* | |
54ceac45 | 2342 | * Finish setting up an NFS2/3 superblock |
f7b422b1 | 2343 | */ |
9052c7cf | 2344 | void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_info) |
f7b422b1 | 2345 | { |
c40f8d1d | 2346 | struct nfs_parsed_mount_data *data = mount_info->parsed; |
f7b422b1 | 2347 | struct nfs_server *server = NFS_SB(sb); |
5006a76c | 2348 | |
54ceac45 DH |
2349 | sb->s_blocksize_bits = 0; |
2350 | sb->s_blocksize = 0; | |
6a74490d BS |
2351 | sb->s_xattr = server->nfs_client->cl_nfs_mod->xattr; |
2352 | sb->s_op = server->nfs_client->cl_nfs_mod->sops; | |
2353 | if (data && data->bsize) | |
54ceac45 | 2354 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); |
f7b422b1 | 2355 | |
6a74490d | 2356 | if (server->nfs_client->rpc_ops->version != 2) { |
54ceac45 DH |
2357 | /* The VFS shouldn't apply the umask to mode bits. We will do |
2358 | * so ourselves when necessary. | |
2359 | */ | |
1751e8a6 | 2360 | sb->s_flags |= SB_POSIXACL; |
54ceac45 | 2361 | sb->s_time_gran = 1; |
20fa1902 | 2362 | sb->s_export_op = &nfs_export_ops; |
816724e6 | 2363 | } |
54ceac45 | 2364 | |
54ceac45 | 2365 | nfs_initialise_sb(sb); |
f7b422b1 | 2366 | } |
89d77c8f | 2367 | EXPORT_SYMBOL_GPL(nfs_fill_super); |
f7b422b1 DH |
2368 | |
2369 | /* | |
3cadf4b8 | 2370 | * Finish setting up a cloned NFS2/3/4 superblock |
f7b422b1 | 2371 | */ |
4f253e1e JK |
2372 | static void nfs_clone_super(struct super_block *sb, |
2373 | struct nfs_mount_info *mount_info) | |
f7b422b1 | 2374 | { |
8c958e0c | 2375 | const struct super_block *old_sb = mount_info->cloned->sb; |
54ceac45 DH |
2376 | struct nfs_server *server = NFS_SB(sb); |
2377 | ||
2378 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; | |
2379 | sb->s_blocksize = old_sb->s_blocksize; | |
2380 | sb->s_maxbytes = old_sb->s_maxbytes; | |
3cadf4b8 BS |
2381 | sb->s_xattr = old_sb->s_xattr; |
2382 | sb->s_op = old_sb->s_op; | |
2383 | sb->s_time_gran = 1; | |
20fa1902 | 2384 | sb->s_export_op = old_sb->s_export_op; |
f7b422b1 | 2385 | |
3cadf4b8 | 2386 | if (server->nfs_client->rpc_ops->version != 2) { |
54ceac45 DH |
2387 | /* The VFS shouldn't apply the umask to mode bits. We will do |
2388 | * so ourselves when necessary. | |
f7b422b1 | 2389 | */ |
1751e8a6 | 2390 | sb->s_flags |= SB_POSIXACL; |
f7b422b1 DH |
2391 | } |
2392 | ||
54ceac45 | 2393 | nfs_initialise_sb(sb); |
f7b422b1 DH |
2394 | } |
2395 | ||
275a5d24 TM |
2396 | static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags) |
2397 | { | |
2398 | const struct nfs_server *a = s->s_fs_info; | |
2399 | const struct rpc_clnt *clnt_a = a->client; | |
2400 | const struct rpc_clnt *clnt_b = b->client; | |
2401 | ||
2402 | if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK)) | |
2403 | goto Ebusy; | |
2404 | if (a->nfs_client != b->nfs_client) | |
2405 | goto Ebusy; | |
0aea92bf | 2406 | if ((a->flags ^ b->flags) & NFS_MOUNT_CMP_FLAGMASK) |
275a5d24 TM |
2407 | goto Ebusy; |
2408 | if (a->wsize != b->wsize) | |
2409 | goto Ebusy; | |
2410 | if (a->rsize != b->rsize) | |
2411 | goto Ebusy; | |
2412 | if (a->acregmin != b->acregmin) | |
2413 | goto Ebusy; | |
2414 | if (a->acregmax != b->acregmax) | |
2415 | goto Ebusy; | |
2416 | if (a->acdirmin != b->acdirmin) | |
2417 | goto Ebusy; | |
2418 | if (a->acdirmax != b->acdirmax) | |
2419 | goto Ebusy; | |
594d1644 | 2420 | if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) |
275a5d24 | 2421 | goto Ebusy; |
e89a5a43 | 2422 | return 1; |
275a5d24 | 2423 | Ebusy: |
e89a5a43 TM |
2424 | return 0; |
2425 | } | |
2426 | ||
2427 | struct nfs_sb_mountdata { | |
2428 | struct nfs_server *server; | |
2429 | int mntflags; | |
2430 | }; | |
2431 | ||
2432 | static int nfs_set_super(struct super_block *s, void *data) | |
2433 | { | |
2434 | struct nfs_sb_mountdata *sb_mntdata = data; | |
2435 | struct nfs_server *server = sb_mntdata->server; | |
2436 | int ret; | |
2437 | ||
2438 | s->s_flags = sb_mntdata->mntflags; | |
2439 | s->s_fs_info = server; | |
8b244ff2 | 2440 | s->s_d_op = server->nfs_client->rpc_ops->dentry_ops; |
e89a5a43 TM |
2441 | ret = set_anon_super(s, server); |
2442 | if (ret == 0) | |
2443 | server->s_dev = s->s_dev; | |
2444 | return ret; | |
2445 | } | |
2446 | ||
fd00a8ff CL |
2447 | static int nfs_compare_super_address(struct nfs_server *server1, |
2448 | struct nfs_server *server2) | |
2449 | { | |
2450 | struct sockaddr *sap1, *sap2; | |
7e3fcf61 BF |
2451 | struct rpc_xprt *xprt1 = server1->client->cl_xprt; |
2452 | struct rpc_xprt *xprt2 = server2->client->cl_xprt; | |
2453 | ||
2454 | if (!net_eq(xprt1->xprt_net, xprt2->xprt_net)) | |
2455 | return 0; | |
fd00a8ff CL |
2456 | |
2457 | sap1 = (struct sockaddr *)&server1->nfs_client->cl_addr; | |
2458 | sap2 = (struct sockaddr *)&server2->nfs_client->cl_addr; | |
2459 | ||
2460 | if (sap1->sa_family != sap2->sa_family) | |
2461 | return 0; | |
2462 | ||
2463 | switch (sap1->sa_family) { | |
2464 | case AF_INET: { | |
2465 | struct sockaddr_in *sin1 = (struct sockaddr_in *)sap1; | |
2466 | struct sockaddr_in *sin2 = (struct sockaddr_in *)sap2; | |
2467 | if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) | |
2468 | return 0; | |
2469 | if (sin1->sin_port != sin2->sin_port) | |
2470 | return 0; | |
2471 | break; | |
2472 | } | |
2473 | case AF_INET6: { | |
2474 | struct sockaddr_in6 *sin1 = (struct sockaddr_in6 *)sap1; | |
2475 | struct sockaddr_in6 *sin2 = (struct sockaddr_in6 *)sap2; | |
2476 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) | |
2477 | return 0; | |
2478 | if (sin1->sin6_port != sin2->sin6_port) | |
2479 | return 0; | |
2480 | break; | |
2481 | } | |
2482 | default: | |
2483 | return 0; | |
2484 | } | |
2485 | ||
2486 | return 1; | |
2487 | } | |
2488 | ||
3b7eb5e3 TM |
2489 | static int nfs_compare_userns(const struct nfs_server *old, |
2490 | const struct nfs_server *new) | |
2491 | { | |
2492 | const struct user_namespace *oldns = &init_user_ns; | |
2493 | const struct user_namespace *newns = &init_user_ns; | |
2494 | ||
2495 | if (old->client && old->client->cl_cred) | |
2496 | oldns = old->client->cl_cred->user_ns; | |
2497 | if (new->client && new->client->cl_cred) | |
2498 | newns = new->client->cl_cred->user_ns; | |
2499 | if (oldns != newns) | |
2500 | return 0; | |
2501 | return 1; | |
2502 | } | |
2503 | ||
e89a5a43 TM |
2504 | static int nfs_compare_super(struct super_block *sb, void *data) |
2505 | { | |
2506 | struct nfs_sb_mountdata *sb_mntdata = data; | |
2507 | struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb); | |
2508 | int mntflags = sb_mntdata->mntflags; | |
2509 | ||
fd00a8ff | 2510 | if (!nfs_compare_super_address(old, server)) |
e89a5a43 TM |
2511 | return 0; |
2512 | /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */ | |
2513 | if (old->flags & NFS_MOUNT_UNSHARED) | |
2514 | return 0; | |
2515 | if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0) | |
2516 | return 0; | |
3b7eb5e3 TM |
2517 | if (!nfs_compare_userns(old, server)) |
2518 | return 0; | |
e89a5a43 | 2519 | return nfs_compare_mount_options(sb, server, mntflags); |
275a5d24 TM |
2520 | } |
2521 | ||
39ffb921 | 2522 | #ifdef CONFIG_NFS_FSCACHE |
2311b943 BS |
2523 | static void nfs_get_cache_cookie(struct super_block *sb, |
2524 | struct nfs_parsed_mount_data *parsed, | |
2525 | struct nfs_clone_mount *cloned) | |
2526 | { | |
c4271c6e | 2527 | struct nfs_server *nfss = NFS_SB(sb); |
2311b943 BS |
2528 | char *uniq = NULL; |
2529 | int ulen = 0; | |
2530 | ||
c4271c6e TM |
2531 | nfss->fscache_key = NULL; |
2532 | nfss->fscache = NULL; | |
2533 | ||
2534 | if (parsed) { | |
2535 | if (!(parsed->options & NFS_OPTION_FSCACHE)) | |
2536 | return; | |
2537 | if (parsed->fscache_uniq) { | |
2538 | uniq = parsed->fscache_uniq; | |
2539 | ulen = strlen(parsed->fscache_uniq); | |
2540 | } | |
2311b943 BS |
2541 | } else if (cloned) { |
2542 | struct nfs_server *mnt_s = NFS_SB(cloned->sb); | |
c4271c6e TM |
2543 | if (!(mnt_s->options & NFS_OPTION_FSCACHE)) |
2544 | return; | |
2311b943 BS |
2545 | if (mnt_s->fscache_key) { |
2546 | uniq = mnt_s->fscache_key->key.uniquifier; | |
2547 | ulen = mnt_s->fscache_key->key.uniq_len; | |
2548 | }; | |
c4271c6e TM |
2549 | } else |
2550 | return; | |
2311b943 BS |
2551 | |
2552 | nfs_fscache_get_super_cookie(sb, uniq, ulen); | |
2553 | } | |
39ffb921 TM |
2554 | #else |
2555 | static void nfs_get_cache_cookie(struct super_block *sb, | |
2556 | struct nfs_parsed_mount_data *parsed, | |
2557 | struct nfs_clone_mount *cloned) | |
2558 | { | |
2559 | } | |
2560 | #endif | |
2311b943 | 2561 | |
fbdefd64 BS |
2562 | int nfs_set_sb_security(struct super_block *s, struct dentry *mntroot, |
2563 | struct nfs_mount_info *mount_info) | |
3d176e3f | 2564 | { |
aa9c2669 DQ |
2565 | int error; |
2566 | unsigned long kflags = 0, kflags_out = 0; | |
2567 | if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL) | |
2568 | kflags |= SECURITY_LSM_NATIVE_LABELS; | |
2569 | ||
204cc0cc | 2570 | error = security_sb_set_mnt_opts(s, mount_info->parsed->lsm_opts, |
aa9c2669 DQ |
2571 | kflags, &kflags_out); |
2572 | if (error) | |
2573 | goto err; | |
2574 | ||
2575 | if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL && | |
2576 | !(kflags_out & SECURITY_LSM_NATIVE_LABELS)) | |
2577 | NFS_SB(s)->caps &= ~NFS_CAP_SECURITY_LABEL; | |
2578 | err: | |
2579 | return error; | |
3d176e3f | 2580 | } |
89d77c8f | 2581 | EXPORT_SYMBOL_GPL(nfs_set_sb_security); |
3d176e3f | 2582 | |
fbdefd64 BS |
2583 | int nfs_clone_sb_security(struct super_block *s, struct dentry *mntroot, |
2584 | struct nfs_mount_info *mount_info) | |
3d176e3f | 2585 | { |
0b4d3452 SM |
2586 | int error; |
2587 | unsigned long kflags = 0, kflags_out = 0; | |
2588 | ||
3d176e3f | 2589 | /* clone any lsm security options from the parent to the new sb */ |
2b0143b5 | 2590 | if (d_inode(mntroot)->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) |
3d176e3f | 2591 | return -ESTALE; |
0b4d3452 SM |
2592 | |
2593 | if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL) | |
2594 | kflags |= SECURITY_LSM_NATIVE_LABELS; | |
2595 | ||
2596 | error = security_sb_clone_mnt_opts(mount_info->cloned->sb, s, kflags, | |
2597 | &kflags_out); | |
2598 | if (error) | |
2599 | return error; | |
2600 | ||
2601 | if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL && | |
2602 | !(kflags_out & SECURITY_LSM_NATIVE_LABELS)) | |
2603 | NFS_SB(s)->caps &= ~NFS_CAP_SECURITY_LABEL; | |
2604 | return 0; | |
3d176e3f | 2605 | } |
89d77c8f | 2606 | EXPORT_SYMBOL_GPL(nfs_clone_sb_security); |
3d176e3f | 2607 | |
ab7017a3 | 2608 | struct dentry *nfs_fs_mount_common(struct nfs_server *server, |
fbdefd64 | 2609 | int flags, const char *dev_name, |
ab7017a3 BS |
2610 | struct nfs_mount_info *mount_info, |
2611 | struct nfs_subversion *nfs_mod) | |
f7b422b1 | 2612 | { |
f7b422b1 | 2613 | struct super_block *s; |
01194981 | 2614 | struct dentry *mntroot = ERR_PTR(-ENOMEM); |
75180df2 | 2615 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2616 | struct nfs_sb_mountdata sb_mntdata = { |
2617 | .mntflags = flags, | |
c40f8d1d | 2618 | .server = server, |
e89a5a43 | 2619 | }; |
01194981 | 2620 | int error; |
33852a1f | 2621 | |
75180df2 TM |
2622 | if (server->flags & NFS_MOUNT_UNSHARED) |
2623 | compare_super = NULL; | |
2624 | ||
fb2088cc SP |
2625 | /* -o noac implies -o sync */ |
2626 | if (server->flags & NFS_MOUNT_NOAC) | |
1751e8a6 | 2627 | sb_mntdata.mntflags |= SB_SYNCHRONOUS; |
fb2088cc | 2628 | |
e890db01 | 2629 | if (mount_info->cloned != NULL && mount_info->cloned->sb != NULL) |
1751e8a6 LT |
2630 | if (mount_info->cloned->sb->s_flags & SB_SYNCHRONOUS) |
2631 | sb_mntdata.mntflags |= SB_SYNCHRONOUS; | |
e890db01 | 2632 | |
54ceac45 | 2633 | /* Get a superblock - note that we may end up sharing one that already exists */ |
ab7017a3 | 2634 | s = sget(nfs_mod->nfs_fs, compare_super, nfs_set_super, flags, &sb_mntdata); |
816724e6 | 2635 | if (IS_ERR(s)) { |
01194981 | 2636 | mntroot = ERR_CAST(s); |
54ceac45 | 2637 | goto out_err_nosb; |
816724e6 TM |
2638 | } |
2639 | ||
54ceac45 DH |
2640 | if (s->s_fs_info != server) { |
2641 | nfs_free_server(server); | |
2642 | server = NULL; | |
fa799759 | 2643 | } else { |
9052c7cf JK |
2644 | error = super_setup_bdi_name(s, "%u:%u", MAJOR(server->s_dev), |
2645 | MINOR(server->s_dev)); | |
2646 | if (error) { | |
2647 | mntroot = ERR_PTR(error); | |
2648 | goto error_splat_super; | |
2649 | } | |
2650 | s->s_bdi->ra_pages = server->rpages * NFS_MAX_READAHEAD; | |
ce6cda18 | 2651 | server->super = s; |
54ceac45 | 2652 | } |
f7b422b1 | 2653 | |
54ceac45 DH |
2654 | if (!s->s_root) { |
2655 | /* initial superblock/root creation */ | |
9052c7cf | 2656 | mount_info->fill_super(s, mount_info); |
3d176e3f | 2657 | nfs_get_cache_cookie(s, mount_info->parsed, mount_info->cloned); |
95dd7758 EB |
2658 | if (!(server->flags & NFS_MOUNT_UNSHARED)) |
2659 | s->s_iflags |= SB_I_MULTIROOT; | |
54ceac45 | 2660 | } |
f7b422b1 | 2661 | |
87c7083d | 2662 | mntroot = nfs_get_root(s, mount_info->mntfh, dev_name); |
01194981 | 2663 | if (IS_ERR(mntroot)) |
54ceac45 | 2664 | goto error_splat_super; |
816724e6 | 2665 | |
3d176e3f | 2666 | error = mount_info->set_security(s, mntroot, mount_info); |
f9c3a380 EP |
2667 | if (error) |
2668 | goto error_splat_root; | |
2669 | ||
1751e8a6 | 2670 | s->s_flags |= SB_ACTIVE; |
0655960f CL |
2671 | |
2672 | out: | |
01194981 | 2673 | return mntroot; |
816724e6 | 2674 | |
54ceac45 DH |
2675 | out_err_nosb: |
2676 | nfs_free_server(server); | |
0655960f | 2677 | goto out; |
54ceac45 | 2678 | |
f9c3a380 EP |
2679 | error_splat_root: |
2680 | dput(mntroot); | |
01194981 | 2681 | mntroot = ERR_PTR(error); |
54ceac45 | 2682 | error_splat_super: |
6f5bbff9 | 2683 | deactivate_locked_super(s); |
0655960f | 2684 | goto out; |
f7b422b1 | 2685 | } |
89d77c8f | 2686 | EXPORT_SYMBOL_GPL(nfs_fs_mount_common); |
f7b422b1 | 2687 | |
fbdefd64 | 2688 | struct dentry *nfs_fs_mount(struct file_system_type *fs_type, |
c40f8d1d BS |
2689 | int flags, const char *dev_name, void *raw_data) |
2690 | { | |
c40f8d1d BS |
2691 | struct nfs_mount_info mount_info = { |
2692 | .fill_super = nfs_fill_super, | |
3d176e3f | 2693 | .set_security = nfs_set_sb_security, |
c40f8d1d | 2694 | }; |
c40f8d1d | 2695 | struct dentry *mntroot = ERR_PTR(-ENOMEM); |
ab7017a3 | 2696 | struct nfs_subversion *nfs_mod; |
c40f8d1d BS |
2697 | int error; |
2698 | ||
46058d46 | 2699 | mount_info.parsed = nfs_alloc_parsed_mount_data(); |
87c7083d BS |
2700 | mount_info.mntfh = nfs_alloc_fhandle(); |
2701 | if (mount_info.parsed == NULL || mount_info.mntfh == NULL) | |
c40f8d1d BS |
2702 | goto out; |
2703 | ||
2704 | /* Validate the mount data */ | |
87c7083d | 2705 | error = nfs_validate_mount_data(fs_type, raw_data, mount_info.parsed, mount_info.mntfh, dev_name); |
b72e4f42 | 2706 | if (error == NFS_TEXT_DATA) |
46058d46 | 2707 | error = nfs_validate_text_mount_data(raw_data, mount_info.parsed, dev_name); |
c40f8d1d BS |
2708 | if (error < 0) { |
2709 | mntroot = ERR_PTR(error); | |
2710 | goto out; | |
2711 | } | |
c40f8d1d | 2712 | |
ab7017a3 BS |
2713 | nfs_mod = get_nfs_version(mount_info.parsed->version); |
2714 | if (IS_ERR(nfs_mod)) { | |
2715 | mntroot = ERR_CAST(nfs_mod); | |
2716 | goto out; | |
2717 | } | |
2718 | ||
ff9099f2 | 2719 | mntroot = nfs_mod->rpc_ops->try_mount(flags, dev_name, &mount_info, nfs_mod); |
ab7017a3 BS |
2720 | |
2721 | put_nfs_version(nfs_mod); | |
c40f8d1d | 2722 | out: |
46058d46 | 2723 | nfs_free_parsed_mount_data(mount_info.parsed); |
87c7083d | 2724 | nfs_free_fhandle(mount_info.mntfh); |
c40f8d1d BS |
2725 | return mntroot; |
2726 | } | |
89d77c8f | 2727 | EXPORT_SYMBOL_GPL(nfs_fs_mount); |
c40f8d1d | 2728 | |
54ceac45 DH |
2729 | /* |
2730 | * Destroy an NFS2/3 superblock | |
2731 | */ | |
fbdefd64 | 2732 | void nfs_kill_super(struct super_block *s) |
f7b422b1 DH |
2733 | { |
2734 | struct nfs_server *server = NFS_SB(s); | |
7b14a213 CH |
2735 | dev_t dev = s->s_dev; |
2736 | ||
2737 | generic_shutdown_super(s); | |
f7b422b1 | 2738 | |
08734048 | 2739 | nfs_fscache_release_super_cookie(s); |
7b14a213 | 2740 | |
54ceac45 | 2741 | nfs_free_server(server); |
7b14a213 | 2742 | free_anon_bdev(dev); |
f7b422b1 | 2743 | } |
89d77c8f | 2744 | EXPORT_SYMBOL_GPL(nfs_kill_super); |
f7b422b1 | 2745 | |
54ceac45 | 2746 | /* |
8c958e0c | 2747 | * Clone an NFS2/3/4 server record on xdev traversal (FSID-change) |
54ceac45 | 2748 | */ |
3dd4f8ef | 2749 | static struct dentry * |
e8f25e6d BS |
2750 | nfs_xdev_mount(struct file_system_type *fs_type, int flags, |
2751 | const char *dev_name, void *raw_data) | |
f7b422b1 | 2752 | { |
e8f25e6d BS |
2753 | struct nfs_clone_mount *data = raw_data; |
2754 | struct nfs_mount_info mount_info = { | |
2755 | .fill_super = nfs_clone_super, | |
2756 | .set_security = nfs_clone_sb_security, | |
2757 | .cloned = data, | |
2758 | }; | |
54ceac45 | 2759 | struct nfs_server *server; |
3d176e3f | 2760 | struct dentry *mntroot = ERR_PTR(-ENOMEM); |
ab7017a3 | 2761 | struct nfs_subversion *nfs_mod = NFS_SB(data->sb)->nfs_client->cl_nfs_mod; |
f7b422b1 | 2762 | |
dee972b9 | 2763 | dprintk("--> nfs_xdev_mount()\n"); |
f7b422b1 | 2764 | |
e8f25e6d | 2765 | mount_info.mntfh = mount_info.cloned->fh; |
87c7083d | 2766 | |
54ceac45 | 2767 | /* create a new volume representation */ |
1179acc6 | 2768 | server = nfs_mod->rpc_ops->clone_server(NFS_SB(data->sb), data->fh, data->fattr, data->authflavor); |
f7b422b1 | 2769 | |
dee972b9 TM |
2770 | if (IS_ERR(server)) |
2771 | mntroot = ERR_CAST(server); | |
2772 | else | |
2773 | mntroot = nfs_fs_mount_common(server, flags, | |
2774 | dev_name, &mount_info, nfs_mod); | |
24c8dbbb | 2775 | |
dee972b9 TM |
2776 | dprintk("<-- nfs_xdev_mount() = %ld\n", |
2777 | IS_ERR(mntroot) ? PTR_ERR(mntroot) : 0L); | |
2778 | return mntroot; | |
f7b422b1 DH |
2779 | } |
2780 | ||
89d77c8f | 2781 | #if IS_ENABLED(CONFIG_NFS_V4) |
54ceac45 | 2782 | |
01c3f052 TM |
2783 | static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) |
2784 | { | |
5eebde23 SJ |
2785 | args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3| |
2786 | NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL); | |
01c3f052 TM |
2787 | } |
2788 | ||
f0768ebd CL |
2789 | /* |
2790 | * Validate NFSv4 mount options | |
2791 | */ | |
91ea40b9 TT |
2792 | static int nfs4_validate_mount_data(void *options, |
2793 | struct nfs_parsed_mount_data *args, | |
2794 | const char *dev_name) | |
f0768ebd | 2795 | { |
4cfd74fc | 2796 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; |
91ea40b9 | 2797 | struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; |
f0768ebd CL |
2798 | char *c; |
2799 | ||
2800 | if (data == NULL) | |
2801 | goto out_no_data; | |
2802 | ||
cdf66442 BS |
2803 | args->version = 4; |
2804 | ||
f0768ebd CL |
2805 | switch (data->version) { |
2806 | case 1: | |
4c568017 CL |
2807 | if (data->host_addrlen > sizeof(args->nfs_server.address)) |
2808 | goto out_no_address; | |
2809 | if (data->host_addrlen == 0) | |
f0768ebd | 2810 | goto out_no_address; |
4c568017 | 2811 | args->nfs_server.addrlen = data->host_addrlen; |
4cfd74fc | 2812 | if (copy_from_user(sap, data->host_addr, data->host_addrlen)) |
f0768ebd | 2813 | return -EFAULT; |
4cfd74fc | 2814 | if (!nfs_verify_server_address(sap)) |
f0768ebd | 2815 | goto out_no_address; |
872ece86 | 2816 | args->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port); |
f0768ebd | 2817 | |
6738b251 | 2818 | if (data->auth_flavourlen) { |
74c98811 | 2819 | rpc_authflavor_t pseudoflavor; |
6738b251 CL |
2820 | if (data->auth_flavourlen > 1) |
2821 | goto out_inval_auth; | |
74c98811 | 2822 | if (copy_from_user(&pseudoflavor, |
91ea40b9 | 2823 | data->auth_flavours, |
74c98811 | 2824 | sizeof(pseudoflavor))) |
f0768ebd | 2825 | return -EFAULT; |
a3f73c27 | 2826 | args->selected_flavor = pseudoflavor; |
74c98811 | 2827 | } else |
a3f73c27 | 2828 | args->selected_flavor = RPC_AUTH_UNIX; |
f0768ebd CL |
2829 | |
2830 | c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); | |
2831 | if (IS_ERR(c)) | |
2832 | return PTR_ERR(c); | |
91ea40b9 | 2833 | args->nfs_server.hostname = c; |
f0768ebd CL |
2834 | |
2835 | c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); | |
2836 | if (IS_ERR(c)) | |
2837 | return PTR_ERR(c); | |
91ea40b9 TT |
2838 | args->nfs_server.export_path = c; |
2839 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); | |
f0768ebd CL |
2840 | |
2841 | c = strndup_user(data->client_addr.data, 16); | |
2842 | if (IS_ERR(c)) | |
2843 | return PTR_ERR(c); | |
91ea40b9 TT |
2844 | args->client_address = c; |
2845 | ||
2846 | /* | |
2847 | * Translate to nfs_parsed_mount_data, which nfs4_fill_super | |
2848 | * can deal with. | |
2849 | */ | |
2850 | ||
2851 | args->flags = data->flags & NFS4_MOUNT_FLAGMASK; | |
2852 | args->rsize = data->rsize; | |
2853 | args->wsize = data->wsize; | |
2854 | args->timeo = data->timeo; | |
2855 | args->retrans = data->retrans; | |
2856 | args->acregmin = data->acregmin; | |
2857 | args->acregmax = data->acregmax; | |
2858 | args->acdirmin = data->acdirmin; | |
2859 | args->acdirmax = data->acdirmax; | |
2860 | args->nfs_server.protocol = data->proto; | |
259875ef | 2861 | nfs_validate_transport_protocol(args); |
6da1a034 TM |
2862 | if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) |
2863 | goto out_invalid_transport_udp; | |
f0768ebd CL |
2864 | |
2865 | break; | |
7630c852 | 2866 | default: |
b72e4f42 | 2867 | return NFS_TEXT_DATA; |
f0768ebd CL |
2868 | } |
2869 | ||
2870 | return 0; | |
2871 | ||
2872 | out_no_data: | |
2873 | dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); | |
2874 | return -EINVAL; | |
2875 | ||
2876 | out_inval_auth: | |
2877 | dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", | |
2878 | data->auth_flavourlen); | |
2879 | return -EINVAL; | |
2880 | ||
2881 | out_no_address: | |
2882 | dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); | |
2883 | return -EINVAL; | |
6da1a034 TM |
2884 | |
2885 | out_invalid_transport_udp: | |
2886 | dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); | |
2887 | return -EINVAL; | |
f0768ebd CL |
2888 | } |
2889 | ||
fac1e8e4 BS |
2890 | /* |
2891 | * NFS v4 module parameters need to stay in the | |
2892 | * NFS client for backwards compatibility | |
2893 | */ | |
2894 | unsigned int nfs_callback_set_tcpport; | |
5405fc44 | 2895 | unsigned short nfs_callback_nr_threads; |
fac1e8e4 BS |
2896 | /* Default cache timeout is 10 minutes */ |
2897 | unsigned int nfs_idmap_cache_timeout = 600; | |
2898 | /* Turn off NFSv4 uid/gid mapping when using AUTH_SYS */ | |
2899 | bool nfs4_disable_idmapping = true; | |
2900 | unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE; | |
5405fc44 | 2901 | unsigned short max_session_cb_slots = NFS4_DEF_CB_SLOT_TABLE_SIZE; |
fac1e8e4 | 2902 | unsigned short send_implementation_id = 1; |
6f2ea7f2 | 2903 | char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN] = ""; |
f6de7a39 | 2904 | bool recover_lost_locks = false; |
fac1e8e4 | 2905 | |
5405fc44 | 2906 | EXPORT_SYMBOL_GPL(nfs_callback_nr_threads); |
89d77c8f | 2907 | EXPORT_SYMBOL_GPL(nfs_callback_set_tcpport); |
89d77c8f BS |
2908 | EXPORT_SYMBOL_GPL(nfs_idmap_cache_timeout); |
2909 | EXPORT_SYMBOL_GPL(nfs4_disable_idmapping); | |
2910 | EXPORT_SYMBOL_GPL(max_session_slots); | |
5405fc44 | 2911 | EXPORT_SYMBOL_GPL(max_session_cb_slots); |
89d77c8f | 2912 | EXPORT_SYMBOL_GPL(send_implementation_id); |
6f2ea7f2 | 2913 | EXPORT_SYMBOL_GPL(nfs4_client_id_uniquifier); |
f6de7a39 | 2914 | EXPORT_SYMBOL_GPL(recover_lost_locks); |
89d77c8f | 2915 | |
fac1e8e4 BS |
2916 | #define NFS_CALLBACK_MAXPORTNR (65535U) |
2917 | ||
2918 | static int param_set_portnr(const char *val, const struct kernel_param *kp) | |
2919 | { | |
2920 | unsigned long num; | |
2921 | int ret; | |
2922 | ||
2923 | if (!val) | |
2924 | return -EINVAL; | |
7297cb68 | 2925 | ret = kstrtoul(val, 0, &num); |
379ebf07 | 2926 | if (ret || num > NFS_CALLBACK_MAXPORTNR) |
fac1e8e4 BS |
2927 | return -EINVAL; |
2928 | *((unsigned int *)kp->arg) = num; | |
2929 | return 0; | |
2930 | } | |
9c27847d | 2931 | static const struct kernel_param_ops param_ops_portnr = { |
fac1e8e4 BS |
2932 | .set = param_set_portnr, |
2933 | .get = param_get_uint, | |
2934 | }; | |
2935 | #define param_check_portnr(name, p) __param_check(name, p, unsigned int); | |
2936 | ||
2937 | module_param_named(callback_tcpport, nfs_callback_set_tcpport, portnr, 0644); | |
5405fc44 TM |
2938 | module_param_named(callback_nr_threads, nfs_callback_nr_threads, ushort, 0644); |
2939 | MODULE_PARM_DESC(callback_nr_threads, "Number of threads that will be " | |
2940 | "assigned to the NFSv4 callback channels."); | |
fac1e8e4 BS |
2941 | module_param(nfs_idmap_cache_timeout, int, 0644); |
2942 | module_param(nfs4_disable_idmapping, bool, 0644); | |
6f2ea7f2 CL |
2943 | module_param_string(nfs4_unique_id, nfs4_client_id_uniquifier, |
2944 | NFS4_CLIENT_ID_UNIQ_LEN, 0600); | |
fac1e8e4 BS |
2945 | MODULE_PARM_DESC(nfs4_disable_idmapping, |
2946 | "Turn off NFSv4 idmapping when using 'sec=sys'"); | |
2947 | module_param(max_session_slots, ushort, 0644); | |
2948 | MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 " | |
2949 | "requests the client will negotiate"); | |
5405fc44 | 2950 | module_param(max_session_cb_slots, ushort, 0644); |
f36ab161 | 2951 | MODULE_PARM_DESC(max_session_cb_slots, "Maximum number of parallel NFSv4.1 " |
5405fc44 | 2952 | "callbacks the client will process for a given server"); |
fac1e8e4 BS |
2953 | module_param(send_implementation_id, ushort, 0644); |
2954 | MODULE_PARM_DESC(send_implementation_id, | |
2955 | "Send implementation ID with NFSv4.1 exchange_id"); | |
6f2ea7f2 | 2956 | MODULE_PARM_DESC(nfs4_unique_id, "nfs_client_id4 uniquifier string"); |
425e776d | 2957 | |
f6de7a39 TM |
2958 | module_param(recover_lost_locks, bool, 0644); |
2959 | MODULE_PARM_DESC(recover_lost_locks, | |
2960 | "If the server reports that a lock might be lost, " | |
2961 | "try to recover it risking data corruption."); | |
2962 | ||
2963 | ||
54ceac45 | 2964 | #endif /* CONFIG_NFS_V4 */ |