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Commit | Line | Data |
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f7b422b1 DH |
1 | /* |
2 | * linux/fs/nfs/super.c | |
3 | * | |
4 | * Copyright (C) 1992 Rick Sladkey | |
5 | * | |
6 | * nfs superblock handling functions | |
7 | * | |
526719ba | 8 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
f7b422b1 DH |
9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
10 | * | |
11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
12 | * J.S.Peatfield@damtp.cam.ac.uk | |
13 | * | |
14 | * Split from inode.c by David Howells <dhowells@redhat.com> | |
15 | * | |
54ceac45 DH |
16 | * - superblocks are indexed on server only - all inodes, dentries, etc. associated with a |
17 | * particular server are held in the same superblock | |
18 | * - NFS superblocks can have several effective roots to the dentry tree | |
19 | * - directory type roots are spliced into the tree when a path from one root reaches the root | |
20 | * of another (see nfs_lookup()) | |
f7b422b1 DH |
21 | */ |
22 | ||
f7b422b1 DH |
23 | #include <linux/module.h> |
24 | #include <linux/init.h> | |
25 | ||
26 | #include <linux/time.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/string.h> | |
30 | #include <linux/stat.h> | |
31 | #include <linux/errno.h> | |
32 | #include <linux/unistd.h> | |
33 | #include <linux/sunrpc/clnt.h> | |
34 | #include <linux/sunrpc/stats.h> | |
35 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 36 | #include <linux/sunrpc/xprtsock.h> |
2cf7ff7a | 37 | #include <linux/sunrpc/xprtrdma.h> |
f7b422b1 DH |
38 | #include <linux/nfs_fs.h> |
39 | #include <linux/nfs_mount.h> | |
40 | #include <linux/nfs4_mount.h> | |
41 | #include <linux/lockd/bind.h> | |
f7b422b1 DH |
42 | #include <linux/seq_file.h> |
43 | #include <linux/mount.h> | |
c02d7adf | 44 | #include <linux/namei.h> |
f7b422b1 DH |
45 | #include <linux/nfs_idmap.h> |
46 | #include <linux/vfs.h> | |
47 | #include <linux/inet.h> | |
fd00a8ff | 48 | #include <linux/in6.h> |
5a0e3ad6 | 49 | #include <linux/slab.h> |
fd00a8ff | 50 | #include <net/ipv6.h> |
d8e7748a | 51 | #include <linux/netdevice.h> |
f7b422b1 | 52 | #include <linux/nfs_xdr.h> |
b5d5dfbd | 53 | #include <linux/magic.h> |
bf0fd768 | 54 | #include <linux/parser.h> |
e50a7a1a | 55 | #include <linux/nsproxy.h> |
2446ab60 | 56 | #include <linux/rcupdate.h> |
324d003b | 57 | #include <linux/kthread.h> |
f7b422b1 | 58 | |
f7b422b1 DH |
59 | #include <asm/uaccess.h> |
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 */ | |
82 | Opt_soft, 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 CL |
128 | { Opt_soft, "soft" }, |
129 | { Opt_hard, "hard" }, | |
d33e4dfe CL |
130 | { Opt_deprecated, "intr" }, |
131 | { Opt_deprecated, "nointr" }, | |
bf0fd768 CL |
132 | { Opt_posix, "posix" }, |
133 | { Opt_noposix, "noposix" }, | |
134 | { Opt_cto, "cto" }, | |
135 | { Opt_nocto, "nocto" }, | |
136 | { Opt_ac, "ac" }, | |
137 | { Opt_noac, "noac" }, | |
138 | { Opt_lock, "lock" }, | |
139 | { Opt_nolock, "nolock" }, | |
bf0fd768 CL |
140 | { Opt_udp, "udp" }, |
141 | { Opt_tcp, "tcp" }, | |
2cf7ff7a | 142 | { Opt_rdma, "rdma" }, |
bf0fd768 CL |
143 | { Opt_acl, "acl" }, |
144 | { Opt_noacl, "noacl" }, | |
145 | { Opt_rdirplus, "rdirplus" }, | |
146 | { Opt_nordirplus, "nordirplus" }, | |
75180df2 TM |
147 | { Opt_sharecache, "sharecache" }, |
148 | { Opt_nosharecache, "nosharecache" }, | |
d740351b CL |
149 | { Opt_resvport, "resvport" }, |
150 | { Opt_noresvport, "noresvport" }, | |
b797cac7 | 151 | { Opt_fscache, "fsc" }, |
b797cac7 | 152 | { Opt_nofscache, "nofsc" }, |
89652617 CL |
153 | { Opt_migration, "migration" }, |
154 | { Opt_nomigration, "nomigration" }, | |
bf0fd768 | 155 | |
a5a16bae CL |
156 | { Opt_port, "port=%s" }, |
157 | { Opt_rsize, "rsize=%s" }, | |
158 | { Opt_wsize, "wsize=%s" }, | |
159 | { Opt_bsize, "bsize=%s" }, | |
160 | { Opt_timeo, "timeo=%s" }, | |
161 | { Opt_retrans, "retrans=%s" }, | |
162 | { Opt_acregmin, "acregmin=%s" }, | |
163 | { Opt_acregmax, "acregmax=%s" }, | |
164 | { Opt_acdirmin, "acdirmin=%s" }, | |
165 | { Opt_acdirmax, "acdirmax=%s" }, | |
166 | { Opt_actimeo, "actimeo=%s" }, | |
167 | { Opt_namelen, "namlen=%s" }, | |
168 | { Opt_mountport, "mountport=%s" }, | |
169 | { Opt_mountvers, "mountvers=%s" }, | |
0d71b058 TM |
170 | { Opt_minorversion, "minorversion=%s" }, |
171 | ||
a5a16bae CL |
172 | { Opt_nfsvers, "nfsvers=%s" }, |
173 | { Opt_nfsvers, "vers=%s" }, | |
bf0fd768 CL |
174 | |
175 | { Opt_sec, "sec=%s" }, | |
176 | { Opt_proto, "proto=%s" }, | |
177 | { Opt_mountproto, "mountproto=%s" }, | |
178 | { Opt_addr, "addr=%s" }, | |
179 | { Opt_clientaddr, "clientaddr=%s" }, | |
33832034 | 180 | { Opt_mounthost, "mounthost=%s" }, |
0ac83779 | 181 | { Opt_mountaddr, "mountaddr=%s" }, |
bf0fd768 | 182 | |
7973c1f1 | 183 | { Opt_lookupcache, "lookupcache=%s" }, |
a6d5ff64 | 184 | { Opt_fscache_uniq, "fsc=%s" }, |
5eebde23 | 185 | { Opt_local_lock, "local_lock=%s" }, |
7973c1f1 | 186 | |
3862279a TM |
187 | /* The following needs to be listed after all other options */ |
188 | { Opt_nfsvers, "v%s" }, | |
189 | ||
bf0fd768 CL |
190 | { Opt_err, NULL } |
191 | }; | |
192 | ||
193 | enum { | |
ee671b01 | 194 | Opt_xprt_udp, Opt_xprt_udp6, Opt_xprt_tcp, Opt_xprt_tcp6, Opt_xprt_rdma, |
bf0fd768 CL |
195 | |
196 | Opt_xprt_err | |
197 | }; | |
198 | ||
a447c093 | 199 | static const match_table_t nfs_xprt_protocol_tokens = { |
bf0fd768 | 200 | { Opt_xprt_udp, "udp" }, |
ee671b01 | 201 | { Opt_xprt_udp6, "udp6" }, |
bf0fd768 | 202 | { Opt_xprt_tcp, "tcp" }, |
ee671b01 | 203 | { Opt_xprt_tcp6, "tcp6" }, |
2cf7ff7a | 204 | { Opt_xprt_rdma, "rdma" }, |
bf0fd768 CL |
205 | |
206 | { Opt_xprt_err, NULL } | |
207 | }; | |
208 | ||
209 | enum { | |
210 | Opt_sec_none, Opt_sec_sys, | |
211 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
212 | Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, | |
213 | Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, | |
214 | ||
215 | Opt_sec_err | |
216 | }; | |
217 | ||
a447c093 | 218 | static const match_table_t nfs_secflavor_tokens = { |
bf0fd768 CL |
219 | { Opt_sec_none, "none" }, |
220 | { Opt_sec_none, "null" }, | |
221 | { Opt_sec_sys, "sys" }, | |
222 | ||
223 | { Opt_sec_krb5, "krb5" }, | |
224 | { Opt_sec_krb5i, "krb5i" }, | |
225 | { Opt_sec_krb5p, "krb5p" }, | |
226 | ||
227 | { Opt_sec_lkey, "lkey" }, | |
228 | { Opt_sec_lkeyi, "lkeyi" }, | |
229 | { Opt_sec_lkeyp, "lkeyp" }, | |
230 | ||
8d042218 OK |
231 | { Opt_sec_spkm, "spkm3" }, |
232 | { Opt_sec_spkmi, "spkm3i" }, | |
233 | { Opt_sec_spkmp, "spkm3p" }, | |
234 | ||
bf0fd768 CL |
235 | { Opt_sec_err, NULL } |
236 | }; | |
237 | ||
7973c1f1 TM |
238 | enum { |
239 | Opt_lookupcache_all, Opt_lookupcache_positive, | |
240 | Opt_lookupcache_none, | |
241 | ||
242 | Opt_lookupcache_err | |
243 | }; | |
244 | ||
245 | static match_table_t nfs_lookupcache_tokens = { | |
246 | { Opt_lookupcache_all, "all" }, | |
247 | { Opt_lookupcache_positive, "pos" }, | |
248 | { Opt_lookupcache_positive, "positive" }, | |
249 | { Opt_lookupcache_none, "none" }, | |
250 | ||
251 | { Opt_lookupcache_err, NULL } | |
252 | }; | |
253 | ||
5eebde23 SJ |
254 | enum { |
255 | Opt_local_lock_all, Opt_local_lock_flock, Opt_local_lock_posix, | |
256 | Opt_local_lock_none, | |
257 | ||
258 | Opt_local_lock_err | |
259 | }; | |
260 | ||
261 | static match_table_t nfs_local_lock_tokens = { | |
262 | { Opt_local_lock_all, "all" }, | |
263 | { Opt_local_lock_flock, "flock" }, | |
264 | { Opt_local_lock_posix, "posix" }, | |
265 | { Opt_local_lock_none, "none" }, | |
266 | ||
267 | { Opt_local_lock_err, NULL } | |
268 | }; | |
269 | ||
0d71b058 TM |
270 | enum { |
271 | Opt_vers_2, Opt_vers_3, Opt_vers_4, Opt_vers_4_0, | |
272 | Opt_vers_4_1, | |
273 | ||
274 | Opt_vers_err | |
275 | }; | |
276 | ||
277 | static match_table_t nfs_vers_tokens = { | |
278 | { Opt_vers_2, "2" }, | |
279 | { Opt_vers_3, "3" }, | |
280 | { Opt_vers_4, "4" }, | |
281 | { Opt_vers_4_0, "4.0" }, | |
282 | { Opt_vers_4_1, "4.1" }, | |
283 | ||
284 | { Opt_vers_err, NULL } | |
285 | }; | |
bf0fd768 | 286 | |
31f43471 AV |
287 | static struct dentry *nfs_xdev_mount(struct file_system_type *fs_type, |
288 | int flags, const char *dev_name, void *raw_data); | |
f7b422b1 | 289 | |
ab7017a3 | 290 | struct file_system_type nfs_fs_type = { |
f7b422b1 DH |
291 | .owner = THIS_MODULE, |
292 | .name = "nfs", | |
01194981 | 293 | .mount = nfs_fs_mount, |
f7b422b1 | 294 | .kill_sb = nfs_kill_super, |
349457cc | 295 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 | 296 | }; |
ddda8e0a | 297 | EXPORT_SYMBOL_GPL(nfs_fs_type); |
f7b422b1 | 298 | |
54ceac45 | 299 | struct file_system_type nfs_xdev_fs_type = { |
f7b422b1 DH |
300 | .owner = THIS_MODULE, |
301 | .name = "nfs", | |
31f43471 | 302 | .mount = nfs_xdev_mount, |
f7b422b1 | 303 | .kill_sb = nfs_kill_super, |
349457cc | 304 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
305 | }; |
306 | ||
6a74490d | 307 | const struct super_operations nfs_sops = { |
f7b422b1 DH |
308 | .alloc_inode = nfs_alloc_inode, |
309 | .destroy_inode = nfs_destroy_inode, | |
310 | .write_inode = nfs_write_inode, | |
eed99357 | 311 | .drop_inode = nfs_drop_inode, |
387c149b | 312 | .put_super = nfs_put_super, |
f7b422b1 | 313 | .statfs = nfs_statfs, |
b57922d9 | 314 | .evict_inode = nfs_evict_inode, |
f7b422b1 DH |
315 | .umount_begin = nfs_umount_begin, |
316 | .show_options = nfs_show_options, | |
c7f404b4 AV |
317 | .show_devname = nfs_show_devname, |
318 | .show_path = nfs_show_path, | |
f7b422b1 | 319 | .show_stats = nfs_show_stats, |
48b605f8 | 320 | .remount_fs = nfs_remount, |
f7b422b1 | 321 | }; |
ddda8e0a | 322 | EXPORT_SYMBOL_GPL(nfs_sops); |
f7b422b1 | 323 | |
89d77c8f | 324 | #if IS_ENABLED(CONFIG_NFS_V4) |
b72e4f42 | 325 | static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *); |
d72c727c BS |
326 | static int nfs4_validate_mount_data(void *options, |
327 | struct nfs_parsed_mount_data *args, const char *dev_name); | |
1ae811ee | 328 | |
329 | struct file_system_type nfs4_fs_type = { | |
330 | .owner = THIS_MODULE, | |
331 | .name = "nfs4", | |
332 | .mount = nfs_fs_mount, | |
333 | .kill_sb = nfs_kill_super, | |
334 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, | |
335 | }; | |
336 | EXPORT_SYMBOL_GPL(nfs4_fs_type); | |
337 | ||
338 | static int __init register_nfs4_fs(void) | |
339 | { | |
340 | return register_filesystem(&nfs4_fs_type); | |
341 | } | |
342 | ||
343 | static void unregister_nfs4_fs(void) | |
344 | { | |
345 | unregister_filesystem(&nfs4_fs_type); | |
346 | } | |
347 | #else | |
348 | static int __init register_nfs4_fs(void) | |
349 | { | |
350 | return 0; | |
351 | } | |
352 | ||
353 | static void unregister_nfs4_fs(void) | |
354 | { | |
355 | } | |
f7b422b1 DH |
356 | #endif |
357 | ||
8e1f936b RR |
358 | static struct shrinker acl_shrinker = { |
359 | .shrink = nfs_access_cache_shrinker, | |
360 | .seeks = DEFAULT_SEEKS, | |
361 | }; | |
979df72e | 362 | |
f7b422b1 DH |
363 | /* |
364 | * Register the NFS filesystems | |
365 | */ | |
366 | int __init register_nfs_fs(void) | |
367 | { | |
368 | int ret; | |
369 | ||
370 | ret = register_filesystem(&nfs_fs_type); | |
371 | if (ret < 0) | |
372 | goto error_0; | |
373 | ||
1ae811ee | 374 | ret = register_nfs4_fs(); |
f7b422b1 DH |
375 | if (ret < 0) |
376 | goto error_1; | |
1ae811ee | 377 | |
378 | ret = nfs_register_sysctl(); | |
379 | if (ret < 0) | |
380 | goto error_2; | |
8e1f936b | 381 | register_shrinker(&acl_shrinker); |
f7b422b1 DH |
382 | return 0; |
383 | ||
1ae811ee | 384 | error_2: |
385 | unregister_nfs4_fs(); | |
f7b422b1 DH |
386 | error_1: |
387 | unregister_filesystem(&nfs_fs_type); | |
f7b422b1 DH |
388 | error_0: |
389 | return ret; | |
390 | } | |
391 | ||
392 | /* | |
393 | * Unregister the NFS filesystems | |
394 | */ | |
395 | void __exit unregister_nfs_fs(void) | |
396 | { | |
8e1f936b | 397 | unregister_shrinker(&acl_shrinker); |
49af7ee1 | 398 | nfs_unregister_sysctl(); |
1ae811ee | 399 | unregister_nfs4_fs(); |
f7b422b1 DH |
400 | unregister_filesystem(&nfs_fs_type); |
401 | } | |
402 | ||
1daef0a8 | 403 | void nfs_sb_active(struct super_block *sb) |
ef818a28 | 404 | { |
1daef0a8 | 405 | struct nfs_server *server = NFS_SB(sb); |
ef818a28 | 406 | |
1daef0a8 TM |
407 | if (atomic_inc_return(&server->active) == 1) |
408 | atomic_inc(&sb->s_active); | |
ef818a28 | 409 | } |
89d77c8f | 410 | EXPORT_SYMBOL_GPL(nfs_sb_active); |
ef818a28 | 411 | |
1daef0a8 | 412 | void nfs_sb_deactive(struct super_block *sb) |
ef818a28 SD |
413 | { |
414 | struct nfs_server *server = NFS_SB(sb); | |
1daef0a8 TM |
415 | |
416 | if (atomic_dec_and_test(&server->active)) | |
417 | deactivate_super(sb); | |
ef818a28 | 418 | } |
89d77c8f | 419 | EXPORT_SYMBOL_GPL(nfs_sb_deactive); |
ef818a28 | 420 | |
324d003b WAA |
421 | static int nfs_deactivate_super_async_work(void *ptr) |
422 | { | |
423 | struct super_block *sb = ptr; | |
424 | ||
425 | deactivate_super(sb); | |
426 | module_put_and_exit(0); | |
427 | return 0; | |
428 | } | |
429 | ||
430 | /* | |
431 | * same effect as deactivate_super, but will do final unmount in kthread | |
432 | * context | |
433 | */ | |
434 | static void nfs_deactivate_super_async(struct super_block *sb) | |
435 | { | |
436 | struct task_struct *task; | |
437 | char buf[INET6_ADDRSTRLEN + 1]; | |
438 | struct nfs_server *server = NFS_SB(sb); | |
439 | struct nfs_client *clp = server->nfs_client; | |
440 | ||
441 | if (!atomic_add_unless(&sb->s_active, -1, 1)) { | |
442 | rcu_read_lock(); | |
443 | snprintf(buf, sizeof(buf), | |
444 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); | |
445 | rcu_read_unlock(); | |
446 | ||
447 | __module_get(THIS_MODULE); | |
448 | task = kthread_run(nfs_deactivate_super_async_work, sb, | |
449 | "%s-deactivate-super", buf); | |
450 | if (IS_ERR(task)) { | |
451 | pr_err("%s: kthread_run: %ld\n", | |
452 | __func__, PTR_ERR(task)); | |
453 | /* make synchronous call and hope for the best */ | |
454 | deactivate_super(sb); | |
455 | module_put(THIS_MODULE); | |
456 | } | |
457 | } | |
458 | } | |
459 | ||
460 | void nfs_sb_deactive_async(struct super_block *sb) | |
461 | { | |
462 | struct nfs_server *server = NFS_SB(sb); | |
463 | ||
464 | if (atomic_dec_and_test(&server->active)) | |
465 | nfs_deactivate_super_async(sb); | |
466 | } | |
467 | EXPORT_SYMBOL_GPL(nfs_sb_deactive_async); | |
468 | ||
f7b422b1 DH |
469 | /* |
470 | * Deliver file system statistics to userspace | |
471 | */ | |
fbdefd64 | 472 | int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
f7b422b1 | 473 | { |
0c7d90cf | 474 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
f7b422b1 DH |
475 | unsigned char blockbits; |
476 | unsigned long blockres; | |
0c7d90cf | 477 | struct nfs_fh *fh = NFS_FH(dentry->d_inode); |
ca7e9a0d TM |
478 | struct nfs_fsstat res; |
479 | int error = -ENOMEM; | |
480 | ||
481 | res.fattr = nfs_alloc_fattr(); | |
482 | if (res.fattr == NULL) | |
483 | goto out_err; | |
f7b422b1 | 484 | |
8fa5c000 | 485 | error = server->nfs_client->rpc_ops->statfs(server, fh, &res); |
fbf3fdd2 MZ |
486 | if (unlikely(error == -ESTALE)) { |
487 | struct dentry *pd_dentry; | |
488 | ||
489 | pd_dentry = dget_parent(dentry); | |
490 | if (pd_dentry != NULL) { | |
491 | nfs_zap_caches(pd_dentry->d_inode); | |
492 | dput(pd_dentry); | |
493 | } | |
494 | } | |
ca7e9a0d | 495 | nfs_free_fattr(res.fattr); |
f7b422b1 DH |
496 | if (error < 0) |
497 | goto out_err; | |
ca7e9a0d | 498 | |
1a0ba9ae | 499 | buf->f_type = NFS_SUPER_MAGIC; |
f7b422b1 DH |
500 | |
501 | /* | |
502 | * Current versions of glibc do not correctly handle the | |
503 | * case where f_frsize != f_bsize. Eventually we want to | |
504 | * report the value of wtmult in this field. | |
505 | */ | |
0c7d90cf | 506 | buf->f_frsize = dentry->d_sb->s_blocksize; |
f7b422b1 DH |
507 | |
508 | /* | |
509 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
510 | * are reported in units of f_frsize. Linux hasn't had | |
511 | * an f_frsize field in its statfs struct until recently, | |
512 | * thus historically Linux's sys_statfs reports these | |
513 | * fields in units of f_bsize. | |
514 | */ | |
0c7d90cf DH |
515 | buf->f_bsize = dentry->d_sb->s_blocksize; |
516 | blockbits = dentry->d_sb->s_blocksize_bits; | |
f7b422b1 DH |
517 | blockres = (1 << blockbits) - 1; |
518 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
519 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
520 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
521 | ||
522 | buf->f_files = res.tfiles; | |
523 | buf->f_ffree = res.afiles; | |
524 | ||
525 | buf->f_namelen = server->namelen; | |
1a0ba9ae | 526 | |
f7b422b1 DH |
527 | return 0; |
528 | ||
529 | out_err: | |
3110ff80 | 530 | dprintk("%s: statfs error = %d\n", __func__, -error); |
1a0ba9ae | 531 | return error; |
f7b422b1 | 532 | } |
89d77c8f | 533 | EXPORT_SYMBOL_GPL(nfs_statfs); |
f7b422b1 | 534 | |
7d4e2747 DH |
535 | /* |
536 | * Map the security flavour number to a name | |
537 | */ | |
81039f1f TM |
538 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
539 | { | |
7d4e2747 | 540 | static const struct { |
81039f1f TM |
541 | rpc_authflavor_t flavour; |
542 | const char *str; | |
543 | } sec_flavours[] = { | |
544 | { RPC_AUTH_NULL, "null" }, | |
545 | { RPC_AUTH_UNIX, "sys" }, | |
546 | { RPC_AUTH_GSS_KRB5, "krb5" }, | |
547 | { RPC_AUTH_GSS_KRB5I, "krb5i" }, | |
548 | { RPC_AUTH_GSS_KRB5P, "krb5p" }, | |
549 | { RPC_AUTH_GSS_LKEY, "lkey" }, | |
550 | { RPC_AUTH_GSS_LKEYI, "lkeyi" }, | |
551 | { RPC_AUTH_GSS_LKEYP, "lkeyp" }, | |
552 | { RPC_AUTH_GSS_SPKM, "spkm" }, | |
553 | { RPC_AUTH_GSS_SPKMI, "spkmi" }, | |
554 | { RPC_AUTH_GSS_SPKMP, "spkmp" }, | |
4d81cd16 | 555 | { UINT_MAX, "unknown" } |
81039f1f TM |
556 | }; |
557 | int i; | |
558 | ||
4d81cd16 | 559 | for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) { |
81039f1f TM |
560 | if (sec_flavours[i].flavour == flavour) |
561 | break; | |
562 | } | |
563 | return sec_flavours[i].str; | |
564 | } | |
565 | ||
ee671b01 JL |
566 | static void nfs_show_mountd_netid(struct seq_file *m, struct nfs_server *nfss, |
567 | int showdefaults) | |
568 | { | |
569 | struct sockaddr *sap = (struct sockaddr *) &nfss->mountd_address; | |
570 | ||
571 | seq_printf(m, ",mountproto="); | |
572 | switch (sap->sa_family) { | |
573 | case AF_INET: | |
574 | switch (nfss->mountd_protocol) { | |
575 | case IPPROTO_UDP: | |
576 | seq_printf(m, RPCBIND_NETID_UDP); | |
577 | break; | |
578 | case IPPROTO_TCP: | |
579 | seq_printf(m, RPCBIND_NETID_TCP); | |
580 | break; | |
581 | default: | |
582 | if (showdefaults) | |
583 | seq_printf(m, "auto"); | |
584 | } | |
585 | break; | |
586 | case AF_INET6: | |
587 | switch (nfss->mountd_protocol) { | |
588 | case IPPROTO_UDP: | |
589 | seq_printf(m, RPCBIND_NETID_UDP6); | |
590 | break; | |
591 | case IPPROTO_TCP: | |
592 | seq_printf(m, RPCBIND_NETID_TCP6); | |
593 | break; | |
594 | default: | |
595 | if (showdefaults) | |
596 | seq_printf(m, "auto"); | |
597 | } | |
598 | break; | |
599 | default: | |
600 | if (showdefaults) | |
601 | seq_printf(m, "auto"); | |
602 | } | |
603 | } | |
604 | ||
82d101d5 CL |
605 | static void nfs_show_mountd_options(struct seq_file *m, struct nfs_server *nfss, |
606 | int showdefaults) | |
607 | { | |
608 | struct sockaddr *sap = (struct sockaddr *)&nfss->mountd_address; | |
609 | ||
d5eff1a3 BS |
610 | if (nfss->flags & NFS_MOUNT_LEGACY_INTERFACE) |
611 | return; | |
612 | ||
82d101d5 CL |
613 | switch (sap->sa_family) { |
614 | case AF_INET: { | |
615 | struct sockaddr_in *sin = (struct sockaddr_in *)sap; | |
be859405 | 616 | seq_printf(m, ",mountaddr=%pI4", &sin->sin_addr.s_addr); |
82d101d5 CL |
617 | break; |
618 | } | |
619 | case AF_INET6: { | |
620 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
d250e190 | 621 | seq_printf(m, ",mountaddr=%pI6c", &sin6->sin6_addr); |
82d101d5 CL |
622 | break; |
623 | } | |
624 | default: | |
625 | if (showdefaults) | |
626 | seq_printf(m, ",mountaddr=unspecified"); | |
627 | } | |
628 | ||
629 | if (nfss->mountd_version || showdefaults) | |
630 | seq_printf(m, ",mountvers=%u", nfss->mountd_version); | |
aa699473 SK |
631 | if ((nfss->mountd_port && |
632 | nfss->mountd_port != (unsigned short)NFS_UNSPEC_PORT) || | |
633 | showdefaults) | |
82d101d5 CL |
634 | seq_printf(m, ",mountport=%u", nfss->mountd_port); |
635 | ||
ee671b01 | 636 | nfs_show_mountd_netid(m, nfss, showdefaults); |
82d101d5 CL |
637 | } |
638 | ||
89d77c8f | 639 | #if IS_ENABLED(CONFIG_NFS_V4) |
0be8189f TM |
640 | static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss, |
641 | int showdefaults) | |
642 | { | |
643 | struct nfs_client *clp = nfss->nfs_client; | |
644 | ||
645 | seq_printf(m, ",clientaddr=%s", clp->cl_ipaddr); | |
0be8189f TM |
646 | } |
647 | #else | |
648 | static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss, | |
649 | int showdefaults) | |
650 | { | |
651 | } | |
652 | #endif | |
653 | ||
7bbceb6f TM |
654 | static void nfs_show_nfs_version(struct seq_file *m, |
655 | unsigned int version, | |
656 | unsigned int minorversion) | |
657 | { | |
658 | seq_printf(m, ",vers=%u", version); | |
659 | if (version == 4) | |
660 | seq_printf(m, ".%u", minorversion); | |
661 | } | |
662 | ||
f7b422b1 DH |
663 | /* |
664 | * Describe the mount options in force on this server representation | |
665 | */ | |
82d101d5 CL |
666 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, |
667 | int showdefaults) | |
f7b422b1 | 668 | { |
509de811 | 669 | static const struct proc_nfs_info { |
f7b422b1 | 670 | int flag; |
509de811 DH |
671 | const char *str; |
672 | const char *nostr; | |
f7b422b1 DH |
673 | } nfs_info[] = { |
674 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, | |
82d101d5 | 675 | { NFS_MOUNT_POSIX, ",posix", "" }, |
f7b422b1 DH |
676 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
677 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
678 | { NFS_MOUNT_NONLM, ",nolock", "" }, | |
679 | { NFS_MOUNT_NOACL, ",noacl", "" }, | |
74dd34e6 | 680 | { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" }, |
d740351b CL |
681 | { NFS_MOUNT_UNSHARED, ",nosharecache", "" }, |
682 | { NFS_MOUNT_NORESVPORT, ",noresvport", "" }, | |
f7b422b1 DH |
683 | { 0, NULL, NULL } |
684 | }; | |
509de811 | 685 | const struct proc_nfs_info *nfs_infop; |
8fa5c000 | 686 | struct nfs_client *clp = nfss->nfs_client; |
82d101d5 | 687 | u32 version = clp->rpc_ops->version; |
7c563cc9 | 688 | int local_flock, local_fcntl; |
f7b422b1 | 689 | |
7bbceb6f | 690 | nfs_show_nfs_version(m, version, clp->cl_minorversion); |
2d767432 CL |
691 | seq_printf(m, ",rsize=%u", nfss->rsize); |
692 | seq_printf(m, ",wsize=%u", nfss->wsize); | |
82d101d5 CL |
693 | if (nfss->bsize != 0) |
694 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
695 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
0e0cab74 | 696 | if (nfss->acregmin != NFS_DEF_ACREGMIN*HZ || showdefaults) |
2d767432 | 697 | seq_printf(m, ",acregmin=%u", nfss->acregmin/HZ); |
0e0cab74 | 698 | if (nfss->acregmax != NFS_DEF_ACREGMAX*HZ || showdefaults) |
2d767432 | 699 | seq_printf(m, ",acregmax=%u", nfss->acregmax/HZ); |
0e0cab74 | 700 | if (nfss->acdirmin != NFS_DEF_ACDIRMIN*HZ || showdefaults) |
2d767432 | 701 | seq_printf(m, ",acdirmin=%u", nfss->acdirmin/HZ); |
0e0cab74 | 702 | if (nfss->acdirmax != NFS_DEF_ACDIRMAX*HZ || showdefaults) |
2d767432 | 703 | seq_printf(m, ",acdirmax=%u", nfss->acdirmax/HZ); |
f7b422b1 DH |
704 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { |
705 | if (nfss->flags & nfs_infop->flag) | |
706 | seq_puts(m, nfs_infop->str); | |
707 | else | |
708 | seq_puts(m, nfs_infop->nostr); | |
709 | } | |
2446ab60 | 710 | rcu_read_lock(); |
56928edd | 711 | seq_printf(m, ",proto=%s", |
ee671b01 | 712 | rpc_peeraddr2str(nfss->client, RPC_DISPLAY_NETID)); |
2446ab60 | 713 | rcu_read_unlock(); |
82d101d5 CL |
714 | if (version == 4) { |
715 | if (nfss->port != NFS_PORT) | |
716 | seq_printf(m, ",port=%u", nfss->port); | |
717 | } else | |
718 | if (nfss->port) | |
719 | seq_printf(m, ",port=%u", nfss->port); | |
720 | ||
33170233 TM |
721 | seq_printf(m, ",timeo=%lu", 10U * nfss->client->cl_timeout->to_initval / HZ); |
722 | seq_printf(m, ",retrans=%u", nfss->client->cl_timeout->to_retries); | |
81039f1f | 723 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
82d101d5 CL |
724 | |
725 | if (version != 4) | |
726 | nfs_show_mountd_options(m, nfss, showdefaults); | |
0be8189f TM |
727 | else |
728 | nfs_show_nfsv4_options(m, nfss, showdefaults); | |
82d101d5 | 729 | |
b797cac7 DH |
730 | if (nfss->options & NFS_OPTION_FSCACHE) |
731 | seq_printf(m, ",fsc"); | |
9b00c643 | 732 | |
89652617 CL |
733 | if (nfss->options & NFS_OPTION_MIGRATION) |
734 | seq_printf(m, ",migration"); | |
735 | ||
9b00c643 PL |
736 | if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONEG) { |
737 | if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONE) | |
738 | seq_printf(m, ",lookupcache=none"); | |
739 | else | |
740 | seq_printf(m, ",lookupcache=pos"); | |
741 | } | |
7c563cc9 SJ |
742 | |
743 | local_flock = nfss->flags & NFS_MOUNT_LOCAL_FLOCK; | |
744 | local_fcntl = nfss->flags & NFS_MOUNT_LOCAL_FCNTL; | |
745 | ||
746 | if (!local_flock && !local_fcntl) | |
747 | seq_printf(m, ",local_lock=none"); | |
748 | else if (local_flock && local_fcntl) | |
749 | seq_printf(m, ",local_lock=all"); | |
750 | else if (local_flock) | |
751 | seq_printf(m, ",local_lock=flock"); | |
752 | else | |
753 | seq_printf(m, ",local_lock=posix"); | |
f7b422b1 DH |
754 | } |
755 | ||
756 | /* | |
757 | * Describe the mount options on this VFS mountpoint | |
758 | */ | |
fbdefd64 | 759 | int nfs_show_options(struct seq_file *m, struct dentry *root) |
f7b422b1 | 760 | { |
34c80b1d | 761 | struct nfs_server *nfss = NFS_SB(root->d_sb); |
f7b422b1 DH |
762 | |
763 | nfs_show_mount_options(m, nfss, 0); | |
764 | ||
2446ab60 | 765 | rcu_read_lock(); |
5d8515ca CL |
766 | seq_printf(m, ",addr=%s", |
767 | rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient, | |
768 | RPC_DISPLAY_ADDR)); | |
2446ab60 | 769 | rcu_read_unlock(); |
f7b422b1 DH |
770 | |
771 | return 0; | |
772 | } | |
89d77c8f | 773 | EXPORT_SYMBOL_GPL(nfs_show_options); |
45402c38 | 774 | |
89d77c8f | 775 | #if IS_ENABLED(CONFIG_NFS_V4) |
ae50c0b5 | 776 | #ifdef CONFIG_NFS_V4_1 |
45402c38 | 777 | static void show_sessions(struct seq_file *m, struct nfs_server *server) |
ae50c0b5 BF |
778 | { |
779 | if (nfs4_has_session(server->nfs_client)) | |
780 | seq_printf(m, ",sessions"); | |
781 | } | |
782 | #else | |
45402c38 HS |
783 | static void show_sessions(struct seq_file *m, struct nfs_server *server) {} |
784 | #endif | |
ae50c0b5 BF |
785 | #endif |
786 | ||
787 | #ifdef CONFIG_NFS_V4_1 | |
45402c38 | 788 | static void show_pnfs(struct seq_file *m, struct nfs_server *server) |
ae50c0b5 BF |
789 | { |
790 | seq_printf(m, ",pnfs="); | |
791 | if (server->pnfs_curr_ld) | |
792 | seq_printf(m, "%s", server->pnfs_curr_ld->name); | |
793 | else | |
794 | seq_printf(m, "not configured"); | |
795 | } | |
7e03b7cc TM |
796 | |
797 | static void show_implementation_id(struct seq_file *m, struct nfs_server *nfss) | |
798 | { | |
59155546 CL |
799 | if (nfss->nfs_client && nfss->nfs_client->cl_implid) { |
800 | struct nfs41_impl_id *impl_id = nfss->nfs_client->cl_implid; | |
7e03b7cc TM |
801 | seq_printf(m, "\n\timpl_id:\tname='%s',domain='%s'," |
802 | "date='%llu,%u'", | |
803 | impl_id->name, impl_id->domain, | |
804 | impl_id->date.seconds, impl_id->date.nseconds); | |
805 | } | |
806 | } | |
45402c38 | 807 | #else |
89d77c8f | 808 | #if IS_ENABLED(CONFIG_NFS_V4) |
7e03b7cc TM |
809 | static void show_pnfs(struct seq_file *m, struct nfs_server *server) |
810 | { | |
811 | } | |
45402c38 | 812 | #endif |
7e03b7cc TM |
813 | static void show_implementation_id(struct seq_file *m, struct nfs_server *nfss) |
814 | { | |
815 | } | |
45402c38 | 816 | #endif |
f7b422b1 | 817 | |
fbdefd64 | 818 | int nfs_show_devname(struct seq_file *m, struct dentry *root) |
c7f404b4 AV |
819 | { |
820 | char *page = (char *) __get_free_page(GFP_KERNEL); | |
821 | char *devname, *dummy; | |
822 | int err = 0; | |
823 | if (!page) | |
824 | return -ENOMEM; | |
97a54868 | 825 | devname = nfs_path(&dummy, root, page, PAGE_SIZE, 0); |
c7f404b4 AV |
826 | if (IS_ERR(devname)) |
827 | err = PTR_ERR(devname); | |
828 | else | |
829 | seq_escape(m, devname, " \t\n\\"); | |
830 | free_page((unsigned long)page); | |
831 | return err; | |
832 | } | |
89d77c8f | 833 | EXPORT_SYMBOL_GPL(nfs_show_devname); |
c7f404b4 | 834 | |
fbdefd64 | 835 | int nfs_show_path(struct seq_file *m, struct dentry *dentry) |
c7f404b4 AV |
836 | { |
837 | seq_puts(m, "/"); | |
838 | return 0; | |
839 | } | |
89d77c8f | 840 | EXPORT_SYMBOL_GPL(nfs_show_path); |
c7f404b4 | 841 | |
f7b422b1 DH |
842 | /* |
843 | * Present statistical information for this VFS mountpoint | |
844 | */ | |
fbdefd64 | 845 | int nfs_show_stats(struct seq_file *m, struct dentry *root) |
f7b422b1 DH |
846 | { |
847 | int i, cpu; | |
64132379 | 848 | struct nfs_server *nfss = NFS_SB(root->d_sb); |
f7b422b1 DH |
849 | struct rpc_auth *auth = nfss->client->cl_auth; |
850 | struct nfs_iostats totals = { }; | |
851 | ||
852 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
853 | ||
854 | /* | |
855 | * Display all mount option settings | |
856 | */ | |
857 | seq_printf(m, "\n\topts:\t"); | |
64132379 AV |
858 | seq_puts(m, root->d_sb->s_flags & MS_RDONLY ? "ro" : "rw"); |
859 | seq_puts(m, root->d_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); | |
860 | seq_puts(m, root->d_sb->s_flags & MS_NOATIME ? ",noatime" : ""); | |
861 | seq_puts(m, root->d_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); | |
f7b422b1 DH |
862 | nfs_show_mount_options(m, nfss, 1); |
863 | ||
864 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); | |
865 | ||
7e03b7cc | 866 | show_implementation_id(m, nfss); |
7d2ed9ac | 867 | |
f7b422b1 DH |
868 | seq_printf(m, "\n\tcaps:\t"); |
869 | seq_printf(m, "caps=0x%x", nfss->caps); | |
2d767432 CL |
870 | seq_printf(m, ",wtmult=%u", nfss->wtmult); |
871 | seq_printf(m, ",dtsize=%u", nfss->dtsize); | |
872 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
873 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
f7b422b1 | 874 | |
89d77c8f | 875 | #if IS_ENABLED(CONFIG_NFS_V4) |
40c55319 | 876 | if (nfss->nfs_client->rpc_ops->version == 4) { |
f7b422b1 DH |
877 | seq_printf(m, "\n\tnfsv4:\t"); |
878 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); | |
879 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
880 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); | |
ae50c0b5 BF |
881 | show_sessions(m, nfss); |
882 | show_pnfs(m, nfss); | |
f7b422b1 DH |
883 | } |
884 | #endif | |
885 | ||
886 | /* | |
887 | * Display security flavor in effect for this mount | |
888 | */ | |
2d767432 | 889 | seq_printf(m, "\n\tsec:\tflavor=%u", auth->au_ops->au_flavor); |
f7b422b1 | 890 | if (auth->au_flavor) |
2d767432 | 891 | seq_printf(m, ",pseudoflavor=%u", auth->au_flavor); |
f7b422b1 DH |
892 | |
893 | /* | |
894 | * Display superblock I/O counters | |
895 | */ | |
896 | for_each_possible_cpu(cpu) { | |
897 | struct nfs_iostats *stats; | |
898 | ||
899 | preempt_disable(); | |
900 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
901 | ||
902 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
903 | totals.events[i] += stats->events[i]; | |
904 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
905 | totals.bytes[i] += stats->bytes[i]; | |
6a51091d DH |
906 | #ifdef CONFIG_NFS_FSCACHE |
907 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
908 | totals.fscache[i] += stats->fscache[i]; | |
909 | #endif | |
f7b422b1 DH |
910 | |
911 | preempt_enable(); | |
912 | } | |
913 | ||
914 | seq_printf(m, "\n\tevents:\t"); | |
915 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
916 | seq_printf(m, "%lu ", totals.events[i]); | |
917 | seq_printf(m, "\n\tbytes:\t"); | |
918 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
919 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
6a51091d DH |
920 | #ifdef CONFIG_NFS_FSCACHE |
921 | if (nfss->options & NFS_OPTION_FSCACHE) { | |
922 | seq_printf(m, "\n\tfsc:\t"); | |
923 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
924 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
925 | } | |
926 | #endif | |
f7b422b1 DH |
927 | seq_printf(m, "\n"); |
928 | ||
929 | rpc_print_iostats(m, nfss->client); | |
930 | ||
931 | return 0; | |
932 | } | |
89d77c8f | 933 | EXPORT_SYMBOL_GPL(nfs_show_stats); |
f7b422b1 DH |
934 | |
935 | /* | |
936 | * Begin unmount by attempting to remove all automounted mountpoints we added | |
54ceac45 | 937 | * in response to xdev traversals and referrals |
f7b422b1 | 938 | */ |
fbdefd64 | 939 | void nfs_umount_begin(struct super_block *sb) |
f7b422b1 | 940 | { |
67e55205 | 941 | struct nfs_server *server; |
fc6ae3cf TM |
942 | struct rpc_clnt *rpc; |
943 | ||
67e55205 | 944 | server = NFS_SB(sb); |
fc6ae3cf TM |
945 | /* -EIO all pending I/O */ |
946 | rpc = server->client_acl; | |
947 | if (!IS_ERR(rpc)) | |
948 | rpc_killall_tasks(rpc); | |
949 | rpc = server->client; | |
950 | if (!IS_ERR(rpc)) | |
951 | rpc_killall_tasks(rpc); | |
f7b422b1 | 952 | } |
89d77c8f | 953 | EXPORT_SYMBOL_GPL(nfs_umount_begin); |
f7b422b1 | 954 | |
db833351 | 955 | static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void) |
9423a08a CL |
956 | { |
957 | struct nfs_parsed_mount_data *data; | |
958 | ||
959 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
960 | if (data) { | |
9423a08a CL |
961 | data->acregmin = NFS_DEF_ACREGMIN; |
962 | data->acregmax = NFS_DEF_ACREGMAX; | |
963 | data->acdirmin = NFS_DEF_ACDIRMIN; | |
964 | data->acdirmax = NFS_DEF_ACDIRMAX; | |
c5811dbd | 965 | data->mount_server.port = NFS_UNSPEC_PORT; |
9423a08a | 966 | data->nfs_server.port = NFS_UNSPEC_PORT; |
c5811dbd | 967 | data->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
9423a08a CL |
968 | data->auth_flavors[0] = RPC_AUTH_UNIX; |
969 | data->auth_flavor_len = 1; | |
970 | data->minorversion = 0; | |
b72e4f42 | 971 | data->need_mount = true; |
9937347a | 972 | data->net = current->nsproxy->net_ns; |
8a0d551a | 973 | security_init_mnt_opts(&data->lsm_opts); |
9423a08a CL |
974 | } |
975 | return data; | |
976 | } | |
977 | ||
8a0d551a JL |
978 | static void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data *data) |
979 | { | |
980 | if (data) { | |
981 | kfree(data->client_address); | |
982 | kfree(data->mount_server.hostname); | |
983 | kfree(data->nfs_server.export_path); | |
984 | kfree(data->nfs_server.hostname); | |
985 | kfree(data->fscache_uniq); | |
986 | security_free_mnt_opts(&data->lsm_opts); | |
987 | kfree(data); | |
988 | } | |
989 | } | |
990 | ||
fc50d58f | 991 | /* |
cdcd7f9a CL |
992 | * Sanity-check a server address provided by the mount command. |
993 | * | |
994 | * Address family must be initialized, and address must not be | |
995 | * the ANY address for that family. | |
fc50d58f CL |
996 | */ |
997 | static int nfs_verify_server_address(struct sockaddr *addr) | |
998 | { | |
999 | switch (addr->sa_family) { | |
1000 | case AF_INET: { | |
cdcd7f9a | 1001 | struct sockaddr_in *sa = (struct sockaddr_in *)addr; |
e6f1cebf | 1002 | return sa->sin_addr.s_addr != htonl(INADDR_ANY); |
cdcd7f9a CL |
1003 | } |
1004 | case AF_INET6: { | |
1005 | struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr; | |
1006 | return !ipv6_addr_any(sa); | |
fc50d58f CL |
1007 | } |
1008 | } | |
1009 | ||
53a0b9c4 | 1010 | dfprintk(MOUNT, "NFS: Invalid IP address specified\n"); |
fc50d58f CL |
1011 | return 0; |
1012 | } | |
1013 | ||
4cfd74fc CL |
1014 | /* |
1015 | * Select between a default port value and a user-specified port value. | |
1016 | * If a zero value is set, then autobind will be used. | |
1017 | */ | |
f5855fec | 1018 | static void nfs_set_port(struct sockaddr *sap, int *port, |
4cfd74fc CL |
1019 | const unsigned short default_port) |
1020 | { | |
f5855fec TM |
1021 | if (*port == NFS_UNSPEC_PORT) |
1022 | *port = default_port; | |
4cfd74fc | 1023 | |
f5855fec | 1024 | rpc_set_port(sap, *port); |
4cfd74fc CL |
1025 | } |
1026 | ||
259875ef TM |
1027 | /* |
1028 | * Sanity check the NFS transport protocol. | |
1029 | * | |
1030 | */ | |
1031 | static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
1032 | { | |
1033 | switch (mnt->nfs_server.protocol) { | |
1034 | case XPRT_TRANSPORT_UDP: | |
1035 | case XPRT_TRANSPORT_TCP: | |
1036 | case XPRT_TRANSPORT_RDMA: | |
1037 | break; | |
1038 | default: | |
1039 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; | |
1040 | } | |
1041 | } | |
1042 | ||
1043 | /* | |
1044 | * For text based NFSv2/v3 mounts, the mount protocol transport default | |
1045 | * settings should depend upon the specified NFS transport. | |
1046 | */ | |
1047 | static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
1048 | { | |
1049 | nfs_validate_transport_protocol(mnt); | |
1050 | ||
1051 | if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP || | |
1052 | mnt->mount_server.protocol == XPRT_TRANSPORT_TCP) | |
1053 | return; | |
1054 | switch (mnt->nfs_server.protocol) { | |
1055 | case XPRT_TRANSPORT_UDP: | |
1056 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; | |
1057 | break; | |
1058 | case XPRT_TRANSPORT_TCP: | |
1059 | case XPRT_TRANSPORT_RDMA: | |
1060 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; | |
1061 | } | |
1062 | } | |
1063 | ||
01060c89 CL |
1064 | /* |
1065 | * Parse the value of the 'sec=' option. | |
01060c89 CL |
1066 | */ |
1067 | static int nfs_parse_security_flavors(char *value, | |
1068 | struct nfs_parsed_mount_data *mnt) | |
1069 | { | |
1070 | substring_t args[MAX_OPT_ARGS]; | |
1071 | ||
1072 | dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); | |
1073 | ||
1074 | switch (match_token(value, nfs_secflavor_tokens, args)) { | |
1075 | case Opt_sec_none: | |
01060c89 CL |
1076 | mnt->auth_flavors[0] = RPC_AUTH_NULL; |
1077 | break; | |
1078 | case Opt_sec_sys: | |
01060c89 CL |
1079 | mnt->auth_flavors[0] = RPC_AUTH_UNIX; |
1080 | break; | |
1081 | case Opt_sec_krb5: | |
01060c89 CL |
1082 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5; |
1083 | break; | |
1084 | case Opt_sec_krb5i: | |
01060c89 CL |
1085 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I; |
1086 | break; | |
1087 | case Opt_sec_krb5p: | |
01060c89 CL |
1088 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P; |
1089 | break; | |
1090 | case Opt_sec_lkey: | |
01060c89 CL |
1091 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY; |
1092 | break; | |
1093 | case Opt_sec_lkeyi: | |
01060c89 CL |
1094 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI; |
1095 | break; | |
1096 | case Opt_sec_lkeyp: | |
01060c89 CL |
1097 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP; |
1098 | break; | |
1099 | case Opt_sec_spkm: | |
01060c89 CL |
1100 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM; |
1101 | break; | |
1102 | case Opt_sec_spkmi: | |
01060c89 CL |
1103 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI; |
1104 | break; | |
1105 | case Opt_sec_spkmp: | |
01060c89 CL |
1106 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP; |
1107 | break; | |
1108 | default: | |
1109 | return 0; | |
1110 | } | |
1111 | ||
9b7160c5 | 1112 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; |
059f90b3 | 1113 | mnt->auth_flavor_len = 1; |
01060c89 CL |
1114 | return 1; |
1115 | } | |
1116 | ||
0d71b058 TM |
1117 | static int nfs_parse_version_string(char *string, |
1118 | struct nfs_parsed_mount_data *mnt, | |
1119 | substring_t *args) | |
1120 | { | |
1121 | mnt->flags &= ~NFS_MOUNT_VER3; | |
1122 | switch (match_token(string, nfs_vers_tokens, args)) { | |
1123 | case Opt_vers_2: | |
1124 | mnt->version = 2; | |
1125 | break; | |
1126 | case Opt_vers_3: | |
1127 | mnt->flags |= NFS_MOUNT_VER3; | |
1128 | mnt->version = 3; | |
1129 | break; | |
1130 | case Opt_vers_4: | |
1131 | /* Backward compatibility option. In future, | |
1132 | * the mount program should always supply | |
1133 | * a NFSv4 minor version number. | |
1134 | */ | |
1135 | mnt->version = 4; | |
1136 | break; | |
1137 | case Opt_vers_4_0: | |
1138 | mnt->version = 4; | |
1139 | mnt->minorversion = 0; | |
1140 | break; | |
1141 | case Opt_vers_4_1: | |
1142 | mnt->version = 4; | |
1143 | mnt->minorversion = 1; | |
1144 | break; | |
1145 | default: | |
1146 | return 0; | |
1147 | } | |
1148 | return 1; | |
1149 | } | |
1150 | ||
c5cb09b6 RL |
1151 | static int nfs_get_option_str(substring_t args[], char **option) |
1152 | { | |
1153 | kfree(*option); | |
1154 | *option = match_strdup(args); | |
1155 | return !option; | |
1156 | } | |
1157 | ||
1158 | static int nfs_get_option_ul(substring_t args[], unsigned long *option) | |
1159 | { | |
1160 | int rc; | |
1161 | char *string; | |
1162 | ||
1163 | string = match_strdup(args); | |
1164 | if (string == NULL) | |
1165 | return -ENOMEM; | |
7297cb68 | 1166 | rc = kstrtoul(string, 10, option); |
c5cb09b6 RL |
1167 | kfree(string); |
1168 | ||
1169 | return rc; | |
1170 | } | |
1171 | ||
bf0fd768 CL |
1172 | /* |
1173 | * Error-check and convert a string of mount options from user space into | |
f45663ce CL |
1174 | * a data structure. The whole mount string is processed; bad options are |
1175 | * skipped as they are encountered. If there were no errors, return 1; | |
1176 | * otherwise return 0 (zero). | |
bf0fd768 CL |
1177 | */ |
1178 | static int nfs_parse_mount_options(char *raw, | |
1179 | struct nfs_parsed_mount_data *mnt) | |
1180 | { | |
f9c3a380 | 1181 | char *p, *string, *secdata; |
d23c45fd | 1182 | int rc, sloppy = 0, invalid_option = 0; |
ee671b01 JL |
1183 | unsigned short protofamily = AF_UNSPEC; |
1184 | unsigned short mountfamily = AF_UNSPEC; | |
bf0fd768 CL |
1185 | |
1186 | if (!raw) { | |
1187 | dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); | |
1188 | return 1; | |
1189 | } | |
1190 | dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); | |
1191 | ||
f9c3a380 EP |
1192 | secdata = alloc_secdata(); |
1193 | if (!secdata) | |
1194 | goto out_nomem; | |
1195 | ||
1196 | rc = security_sb_copy_data(raw, secdata); | |
1197 | if (rc) | |
1198 | goto out_security_failure; | |
1199 | ||
1200 | rc = security_sb_parse_opts_str(secdata, &mnt->lsm_opts); | |
1201 | if (rc) | |
1202 | goto out_security_failure; | |
1203 | ||
1204 | free_secdata(secdata); | |
1205 | ||
bf0fd768 CL |
1206 | while ((p = strsep(&raw, ",")) != NULL) { |
1207 | substring_t args[MAX_OPT_ARGS]; | |
a5a16bae CL |
1208 | unsigned long option; |
1209 | int token; | |
bf0fd768 CL |
1210 | |
1211 | if (!*p) | |
1212 | continue; | |
1213 | ||
1214 | dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); | |
1215 | ||
1216 | token = match_token(p, nfs_mount_option_tokens, args); | |
1217 | switch (token) { | |
f45663ce CL |
1218 | |
1219 | /* | |
1220 | * boolean options: foo/nofoo | |
1221 | */ | |
bf0fd768 CL |
1222 | case Opt_soft: |
1223 | mnt->flags |= NFS_MOUNT_SOFT; | |
1224 | break; | |
1225 | case Opt_hard: | |
1226 | mnt->flags &= ~NFS_MOUNT_SOFT; | |
1227 | break; | |
bf0fd768 CL |
1228 | case Opt_posix: |
1229 | mnt->flags |= NFS_MOUNT_POSIX; | |
1230 | break; | |
1231 | case Opt_noposix: | |
1232 | mnt->flags &= ~NFS_MOUNT_POSIX; | |
1233 | break; | |
1234 | case Opt_cto: | |
1235 | mnt->flags &= ~NFS_MOUNT_NOCTO; | |
1236 | break; | |
1237 | case Opt_nocto: | |
1238 | mnt->flags |= NFS_MOUNT_NOCTO; | |
1239 | break; | |
1240 | case Opt_ac: | |
1241 | mnt->flags &= ~NFS_MOUNT_NOAC; | |
1242 | break; | |
1243 | case Opt_noac: | |
1244 | mnt->flags |= NFS_MOUNT_NOAC; | |
1245 | break; | |
1246 | case Opt_lock: | |
1247 | mnt->flags &= ~NFS_MOUNT_NONLM; | |
5eebde23 SJ |
1248 | mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | |
1249 | NFS_MOUNT_LOCAL_FCNTL); | |
bf0fd768 CL |
1250 | break; |
1251 | case Opt_nolock: | |
1252 | mnt->flags |= NFS_MOUNT_NONLM; | |
5eebde23 SJ |
1253 | mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | |
1254 | NFS_MOUNT_LOCAL_FCNTL); | |
bf0fd768 | 1255 | break; |
bf0fd768 CL |
1256 | case Opt_udp: |
1257 | mnt->flags &= ~NFS_MOUNT_TCP; | |
0896a725 | 1258 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 CL |
1259 | break; |
1260 | case Opt_tcp: | |
1261 | mnt->flags |= NFS_MOUNT_TCP; | |
0896a725 | 1262 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1263 | break; |
2cf7ff7a TT |
1264 | case Opt_rdma: |
1265 | mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ | |
1266 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 1267 | xprt_load_transport(p); |
2cf7ff7a | 1268 | break; |
bf0fd768 CL |
1269 | case Opt_acl: |
1270 | mnt->flags &= ~NFS_MOUNT_NOACL; | |
1271 | break; | |
1272 | case Opt_noacl: | |
1273 | mnt->flags |= NFS_MOUNT_NOACL; | |
1274 | break; | |
1275 | case Opt_rdirplus: | |
1276 | mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; | |
1277 | break; | |
1278 | case Opt_nordirplus: | |
1279 | mnt->flags |= NFS_MOUNT_NORDIRPLUS; | |
1280 | break; | |
75180df2 TM |
1281 | case Opt_sharecache: |
1282 | mnt->flags &= ~NFS_MOUNT_UNSHARED; | |
1283 | break; | |
1284 | case Opt_nosharecache: | |
1285 | mnt->flags |= NFS_MOUNT_UNSHARED; | |
1286 | break; | |
d740351b CL |
1287 | case Opt_resvport: |
1288 | mnt->flags &= ~NFS_MOUNT_NORESVPORT; | |
1289 | break; | |
1290 | case Opt_noresvport: | |
1291 | mnt->flags |= NFS_MOUNT_NORESVPORT; | |
1292 | break; | |
b797cac7 DH |
1293 | case Opt_fscache: |
1294 | mnt->options |= NFS_OPTION_FSCACHE; | |
1295 | kfree(mnt->fscache_uniq); | |
1296 | mnt->fscache_uniq = NULL; | |
1297 | break; | |
1298 | case Opt_nofscache: | |
1299 | mnt->options &= ~NFS_OPTION_FSCACHE; | |
1300 | kfree(mnt->fscache_uniq); | |
1301 | mnt->fscache_uniq = NULL; | |
1302 | break; | |
89652617 CL |
1303 | case Opt_migration: |
1304 | mnt->options |= NFS_OPTION_MIGRATION; | |
1305 | break; | |
1306 | case Opt_nomigration: | |
1307 | mnt->options &= NFS_OPTION_MIGRATION; | |
1308 | break; | |
bf0fd768 | 1309 | |
f45663ce CL |
1310 | /* |
1311 | * options that take numeric values | |
1312 | */ | |
bf0fd768 | 1313 | case Opt_port: |
c5cb09b6 RL |
1314 | if (nfs_get_option_ul(args, &option) || |
1315 | option > USHRT_MAX) | |
d23c45fd CL |
1316 | goto out_invalid_value; |
1317 | mnt->nfs_server.port = option; | |
bf0fd768 CL |
1318 | break; |
1319 | case Opt_rsize: | |
c5cb09b6 | 1320 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1321 | goto out_invalid_value; |
1322 | mnt->rsize = option; | |
bf0fd768 CL |
1323 | break; |
1324 | case Opt_wsize: | |
c5cb09b6 | 1325 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1326 | goto out_invalid_value; |
1327 | mnt->wsize = option; | |
bf0fd768 CL |
1328 | break; |
1329 | case Opt_bsize: | |
c5cb09b6 | 1330 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1331 | goto out_invalid_value; |
1332 | mnt->bsize = option; | |
bf0fd768 CL |
1333 | break; |
1334 | case Opt_timeo: | |
c5cb09b6 | 1335 | if (nfs_get_option_ul(args, &option) || option == 0) |
d23c45fd CL |
1336 | goto out_invalid_value; |
1337 | mnt->timeo = option; | |
bf0fd768 CL |
1338 | break; |
1339 | case Opt_retrans: | |
c5cb09b6 | 1340 | if (nfs_get_option_ul(args, &option) || option == 0) |
d23c45fd CL |
1341 | goto out_invalid_value; |
1342 | mnt->retrans = option; | |
bf0fd768 CL |
1343 | break; |
1344 | case Opt_acregmin: | |
c5cb09b6 | 1345 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1346 | goto out_invalid_value; |
1347 | mnt->acregmin = option; | |
bf0fd768 CL |
1348 | break; |
1349 | case Opt_acregmax: | |
c5cb09b6 | 1350 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1351 | goto out_invalid_value; |
1352 | mnt->acregmax = option; | |
bf0fd768 CL |
1353 | break; |
1354 | case Opt_acdirmin: | |
c5cb09b6 | 1355 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1356 | goto out_invalid_value; |
1357 | mnt->acdirmin = option; | |
bf0fd768 CL |
1358 | break; |
1359 | case Opt_acdirmax: | |
c5cb09b6 | 1360 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1361 | goto out_invalid_value; |
1362 | mnt->acdirmax = option; | |
bf0fd768 CL |
1363 | break; |
1364 | case Opt_actimeo: | |
c5cb09b6 | 1365 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1366 | goto out_invalid_value; |
1367 | mnt->acregmin = mnt->acregmax = | |
1368 | mnt->acdirmin = mnt->acdirmax = option; | |
bf0fd768 CL |
1369 | break; |
1370 | case Opt_namelen: | |
c5cb09b6 | 1371 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1372 | goto out_invalid_value; |
1373 | mnt->namlen = option; | |
bf0fd768 CL |
1374 | break; |
1375 | case Opt_mountport: | |
c5cb09b6 RL |
1376 | if (nfs_get_option_ul(args, &option) || |
1377 | option > USHRT_MAX) | |
d23c45fd CL |
1378 | goto out_invalid_value; |
1379 | mnt->mount_server.port = option; | |
bf0fd768 | 1380 | break; |
bf0fd768 | 1381 | case Opt_mountvers: |
c5cb09b6 | 1382 | if (nfs_get_option_ul(args, &option) || |
f45663ce | 1383 | option < NFS_MNT_VERSION || |
d23c45fd CL |
1384 | option > NFS_MNT3_VERSION) |
1385 | goto out_invalid_value; | |
1386 | mnt->mount_server.version = option; | |
bf0fd768 | 1387 | break; |
3fd5be9e | 1388 | case Opt_minorversion: |
c5cb09b6 | 1389 | if (nfs_get_option_ul(args, &option)) |
f3f4f4ed CL |
1390 | goto out_invalid_value; |
1391 | if (option > NFS4_MAX_MINOR_VERSION) | |
1392 | goto out_invalid_value; | |
1393 | mnt->minorversion = option; | |
3fd5be9e | 1394 | break; |
bf0fd768 | 1395 | |
f45663ce CL |
1396 | /* |
1397 | * options that take text values | |
1398 | */ | |
0d71b058 TM |
1399 | case Opt_nfsvers: |
1400 | string = match_strdup(args); | |
1401 | if (string == NULL) | |
1402 | goto out_nomem; | |
1403 | rc = nfs_parse_version_string(string, mnt, args); | |
1404 | kfree(string); | |
1405 | if (!rc) | |
1406 | goto out_invalid_value; | |
1407 | break; | |
bf0fd768 CL |
1408 | case Opt_sec: |
1409 | string = match_strdup(args); | |
1410 | if (string == NULL) | |
1411 | goto out_nomem; | |
01060c89 | 1412 | rc = nfs_parse_security_flavors(string, mnt); |
bf0fd768 | 1413 | kfree(string); |
f45663ce | 1414 | if (!rc) { |
f45663ce CL |
1415 | dfprintk(MOUNT, "NFS: unrecognized " |
1416 | "security flavor\n"); | |
d23c45fd | 1417 | return 0; |
f45663ce | 1418 | } |
bf0fd768 CL |
1419 | break; |
1420 | case Opt_proto: | |
1421 | string = match_strdup(args); | |
1422 | if (string == NULL) | |
1423 | goto out_nomem; | |
1424 | token = match_token(string, | |
1425 | nfs_xprt_protocol_tokens, args); | |
bf0fd768 | 1426 | |
ee671b01 | 1427 | protofamily = AF_INET; |
bf0fd768 | 1428 | switch (token) { |
ee671b01 JL |
1429 | case Opt_xprt_udp6: |
1430 | protofamily = AF_INET6; | |
fdb66ff4 | 1431 | case Opt_xprt_udp: |
bf0fd768 | 1432 | mnt->flags &= ~NFS_MOUNT_TCP; |
0896a725 | 1433 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 | 1434 | break; |
ee671b01 JL |
1435 | case Opt_xprt_tcp6: |
1436 | protofamily = AF_INET6; | |
fdb66ff4 | 1437 | case Opt_xprt_tcp: |
bf0fd768 | 1438 | mnt->flags |= NFS_MOUNT_TCP; |
0896a725 | 1439 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1440 | break; |
2cf7ff7a TT |
1441 | case Opt_xprt_rdma: |
1442 | /* vector side protocols to TCP */ | |
1443 | mnt->flags |= NFS_MOUNT_TCP; | |
1444 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 1445 | xprt_load_transport(string); |
2cf7ff7a | 1446 | break; |
bf0fd768 | 1447 | default: |
f45663ce CL |
1448 | dfprintk(MOUNT, "NFS: unrecognized " |
1449 | "transport protocol\n"); | |
4223a4a1 | 1450 | kfree(string); |
d23c45fd | 1451 | return 0; |
bf0fd768 | 1452 | } |
c5cb09b6 | 1453 | kfree(string); |
bf0fd768 CL |
1454 | break; |
1455 | case Opt_mountproto: | |
1456 | string = match_strdup(args); | |
1457 | if (string == NULL) | |
1458 | goto out_nomem; | |
1459 | token = match_token(string, | |
1460 | nfs_xprt_protocol_tokens, args); | |
d508afb4 | 1461 | kfree(string); |
bf0fd768 | 1462 | |
ee671b01 | 1463 | mountfamily = AF_INET; |
bf0fd768 | 1464 | switch (token) { |
ee671b01 JL |
1465 | case Opt_xprt_udp6: |
1466 | mountfamily = AF_INET6; | |
fdb66ff4 | 1467 | case Opt_xprt_udp: |
0896a725 | 1468 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 | 1469 | break; |
ee671b01 JL |
1470 | case Opt_xprt_tcp6: |
1471 | mountfamily = AF_INET6; | |
fdb66ff4 | 1472 | case Opt_xprt_tcp: |
0896a725 | 1473 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1474 | break; |
2cf7ff7a | 1475 | case Opt_xprt_rdma: /* not used for side protocols */ |
bf0fd768 | 1476 | default: |
f45663ce CL |
1477 | dfprintk(MOUNT, "NFS: unrecognized " |
1478 | "transport protocol\n"); | |
d23c45fd | 1479 | return 0; |
bf0fd768 CL |
1480 | } |
1481 | break; | |
1482 | case Opt_addr: | |
1483 | string = match_strdup(args); | |
1484 | if (string == NULL) | |
1485 | goto out_nomem; | |
53a0b9c4 | 1486 | mnt->nfs_server.addrlen = |
b48e1278 | 1487 | rpc_pton(mnt->net, string, strlen(string), |
53a0b9c4 CL |
1488 | (struct sockaddr *) |
1489 | &mnt->nfs_server.address, | |
1490 | sizeof(mnt->nfs_server.address)); | |
bf0fd768 | 1491 | kfree(string); |
53a0b9c4 CL |
1492 | if (mnt->nfs_server.addrlen == 0) |
1493 | goto out_invalid_address; | |
bf0fd768 CL |
1494 | break; |
1495 | case Opt_clientaddr: | |
c5cb09b6 | 1496 | if (nfs_get_option_str(args, &mnt->client_address)) |
bf0fd768 | 1497 | goto out_nomem; |
bf0fd768 | 1498 | break; |
33832034 | 1499 | case Opt_mounthost: |
c5cb09b6 RL |
1500 | if (nfs_get_option_str(args, |
1501 | &mnt->mount_server.hostname)) | |
33832034 | 1502 | goto out_nomem; |
33832034 | 1503 | break; |
0ac83779 | 1504 | case Opt_mountaddr: |
bf0fd768 CL |
1505 | string = match_strdup(args); |
1506 | if (string == NULL) | |
1507 | goto out_nomem; | |
53a0b9c4 | 1508 | mnt->mount_server.addrlen = |
b48e1278 | 1509 | rpc_pton(mnt->net, string, strlen(string), |
53a0b9c4 CL |
1510 | (struct sockaddr *) |
1511 | &mnt->mount_server.address, | |
1512 | sizeof(mnt->mount_server.address)); | |
bf0fd768 | 1513 | kfree(string); |
53a0b9c4 CL |
1514 | if (mnt->mount_server.addrlen == 0) |
1515 | goto out_invalid_address; | |
bf0fd768 | 1516 | break; |
7973c1f1 TM |
1517 | case Opt_lookupcache: |
1518 | string = match_strdup(args); | |
1519 | if (string == NULL) | |
1520 | goto out_nomem; | |
1521 | token = match_token(string, | |
1522 | nfs_lookupcache_tokens, args); | |
1523 | kfree(string); | |
1524 | switch (token) { | |
1525 | case Opt_lookupcache_all: | |
1526 | mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); | |
1527 | break; | |
1528 | case Opt_lookupcache_positive: | |
1529 | mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1530 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; | |
1531 | break; | |
1532 | case Opt_lookupcache_none: | |
1533 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1534 | break; | |
1535 | default: | |
7973c1f1 TM |
1536 | dfprintk(MOUNT, "NFS: invalid " |
1537 | "lookupcache argument\n"); | |
d23c45fd | 1538 | return 0; |
7973c1f1 TM |
1539 | }; |
1540 | break; | |
a6d5ff64 | 1541 | case Opt_fscache_uniq: |
c5cb09b6 | 1542 | if (nfs_get_option_str(args, &mnt->fscache_uniq)) |
a6d5ff64 | 1543 | goto out_nomem; |
a6d5ff64 CL |
1544 | mnt->options |= NFS_OPTION_FSCACHE; |
1545 | break; | |
5eebde23 SJ |
1546 | case Opt_local_lock: |
1547 | string = match_strdup(args); | |
1548 | if (string == NULL) | |
1549 | goto out_nomem; | |
1550 | token = match_token(string, nfs_local_lock_tokens, | |
1551 | args); | |
1552 | kfree(string); | |
1553 | switch (token) { | |
1554 | case Opt_local_lock_all: | |
1555 | mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | | |
1556 | NFS_MOUNT_LOCAL_FCNTL); | |
1557 | break; | |
1558 | case Opt_local_lock_flock: | |
1559 | mnt->flags |= NFS_MOUNT_LOCAL_FLOCK; | |
1560 | break; | |
1561 | case Opt_local_lock_posix: | |
1562 | mnt->flags |= NFS_MOUNT_LOCAL_FCNTL; | |
1563 | break; | |
1564 | case Opt_local_lock_none: | |
1565 | mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | | |
1566 | NFS_MOUNT_LOCAL_FCNTL); | |
1567 | break; | |
1568 | default: | |
1569 | dfprintk(MOUNT, "NFS: invalid " | |
1570 | "local_lock argument\n"); | |
1571 | return 0; | |
1572 | }; | |
1573 | break; | |
bf0fd768 | 1574 | |
f45663ce CL |
1575 | /* |
1576 | * Special options | |
1577 | */ | |
1578 | case Opt_sloppy: | |
1579 | sloppy = 1; | |
1580 | dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); | |
1581 | break; | |
bf0fd768 CL |
1582 | case Opt_userspace: |
1583 | case Opt_deprecated: | |
d33e4dfe CL |
1584 | dfprintk(MOUNT, "NFS: ignoring mount option " |
1585 | "'%s'\n", p); | |
bf0fd768 CL |
1586 | break; |
1587 | ||
1588 | default: | |
d23c45fd | 1589 | invalid_option = 1; |
f45663ce CL |
1590 | dfprintk(MOUNT, "NFS: unrecognized mount option " |
1591 | "'%s'\n", p); | |
bf0fd768 CL |
1592 | } |
1593 | } | |
1594 | ||
d23c45fd CL |
1595 | if (!sloppy && invalid_option) |
1596 | return 0; | |
1597 | ||
571b7554 WAA |
1598 | if (mnt->minorversion && mnt->version != 4) |
1599 | goto out_minorversion_mismatch; | |
1600 | ||
89652617 CL |
1601 | if (mnt->options & NFS_OPTION_MIGRATION && |
1602 | mnt->version != 4 && mnt->minorversion != 0) | |
1603 | goto out_migration_misuse; | |
1604 | ||
ee671b01 JL |
1605 | /* |
1606 | * verify that any proto=/mountproto= options match the address | |
1856b225 | 1607 | * families in the addr=/mountaddr= options. |
ee671b01 JL |
1608 | */ |
1609 | if (protofamily != AF_UNSPEC && | |
1610 | protofamily != mnt->nfs_server.address.ss_family) | |
1611 | goto out_proto_mismatch; | |
1612 | ||
1613 | if (mountfamily != AF_UNSPEC) { | |
1614 | if (mnt->mount_server.addrlen) { | |
1615 | if (mountfamily != mnt->mount_server.address.ss_family) | |
1616 | goto out_mountproto_mismatch; | |
1617 | } else { | |
1618 | if (mountfamily != mnt->nfs_server.address.ss_family) | |
1619 | goto out_mountproto_mismatch; | |
1620 | } | |
1621 | } | |
1622 | ||
bf0fd768 CL |
1623 | return 1; |
1624 | ||
ee671b01 JL |
1625 | out_mountproto_mismatch: |
1626 | printk(KERN_INFO "NFS: mount server address does not match mountproto= " | |
1627 | "option\n"); | |
1628 | return 0; | |
1629 | out_proto_mismatch: | |
1630 | printk(KERN_INFO "NFS: server address does not match proto= option\n"); | |
1631 | return 0; | |
53a0b9c4 CL |
1632 | out_invalid_address: |
1633 | printk(KERN_INFO "NFS: bad IP address specified: %s\n", p); | |
1634 | return 0; | |
d23c45fd | 1635 | out_invalid_value: |
53a0b9c4 | 1636 | printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); |
d23c45fd | 1637 | return 0; |
571b7554 WAA |
1638 | out_minorversion_mismatch: |
1639 | printk(KERN_INFO "NFS: mount option vers=%u does not support " | |
1640 | "minorversion=%u\n", mnt->version, mnt->minorversion); | |
1641 | return 0; | |
89652617 CL |
1642 | out_migration_misuse: |
1643 | printk(KERN_INFO | |
1644 | "NFS: 'migration' not supported for this NFS version\n"); | |
1645 | return 0; | |
bf0fd768 CL |
1646 | out_nomem: |
1647 | printk(KERN_INFO "NFS: not enough memory to parse option\n"); | |
1648 | return 0; | |
f9c3a380 EP |
1649 | out_security_failure: |
1650 | free_secdata(secdata); | |
1651 | printk(KERN_INFO "NFS: security options invalid: %d\n", rc); | |
1652 | return 0; | |
bf0fd768 CL |
1653 | } |
1654 | ||
ec88f28d CL |
1655 | /* |
1656 | * Match the requested auth flavors with the list returned by | |
1657 | * the server. Returns zero and sets the mount's authentication | |
1658 | * flavor on success; returns -EACCES if server does not support | |
1659 | * the requested flavor. | |
1660 | */ | |
1661 | static int nfs_walk_authlist(struct nfs_parsed_mount_data *args, | |
1662 | struct nfs_mount_request *request) | |
1663 | { | |
1664 | unsigned int i, j, server_authlist_len = *(request->auth_flav_len); | |
1665 | ||
5eecfde6 CL |
1666 | /* |
1667 | * Certain releases of Linux's mountd return an empty | |
1668 | * flavor list. To prevent behavioral regression with | |
1669 | * these servers (ie. rejecting mounts that used to | |
1670 | * succeed), revert to pre-2.6.32 behavior (no checking) | |
1671 | * if the returned flavor list is empty. | |
1672 | */ | |
1673 | if (server_authlist_len == 0) | |
1674 | return 0; | |
1675 | ||
ec88f28d CL |
1676 | /* |
1677 | * We avoid sophisticated negotiating here, as there are | |
1678 | * plenty of cases where we can get it wrong, providing | |
1679 | * either too little or too much security. | |
1680 | * | |
1681 | * RFC 2623, section 2.7 suggests we SHOULD prefer the | |
1682 | * flavor listed first. However, some servers list | |
1683 | * AUTH_NULL first. Our caller plants AUTH_SYS, the | |
1684 | * preferred default, in args->auth_flavors[0] if user | |
1685 | * didn't specify sec= mount option. | |
1686 | */ | |
1687 | for (i = 0; i < args->auth_flavor_len; i++) | |
1688 | for (j = 0; j < server_authlist_len; j++) | |
1689 | if (args->auth_flavors[i] == request->auth_flavs[j]) { | |
1690 | dfprintk(MOUNT, "NFS: using auth flavor %d\n", | |
1691 | request->auth_flavs[j]); | |
1692 | args->auth_flavors[0] = request->auth_flavs[j]; | |
1693 | return 0; | |
1694 | } | |
1695 | ||
1696 | dfprintk(MOUNT, "NFS: server does not support requested auth flavor\n"); | |
1697 | nfs_umount(request); | |
1698 | return -EACCES; | |
1699 | } | |
1700 | ||
0076d7b7 CL |
1701 | /* |
1702 | * Use the remote server's MOUNT service to request the NFS file handle | |
1703 | * corresponding to the provided path. | |
1704 | */ | |
486aa699 BS |
1705 | static int nfs_request_mount(struct nfs_parsed_mount_data *args, |
1706 | struct nfs_fh *root_fh) | |
0076d7b7 | 1707 | { |
ec88f28d CL |
1708 | rpc_authflavor_t server_authlist[NFS_MAX_SECFLAVORS]; |
1709 | unsigned int server_authlist_len = ARRAY_SIZE(server_authlist); | |
c5d120f8 CL |
1710 | struct nfs_mount_request request = { |
1711 | .sap = (struct sockaddr *) | |
1712 | &args->mount_server.address, | |
1713 | .dirpath = args->nfs_server.export_path, | |
1714 | .protocol = args->mount_server.protocol, | |
1715 | .fh = root_fh, | |
50a737f8 | 1716 | .noresvport = args->flags & NFS_MOUNT_NORESVPORT, |
ec88f28d CL |
1717 | .auth_flav_len = &server_authlist_len, |
1718 | .auth_flavs = server_authlist, | |
6d59b8d5 | 1719 | .net = args->net, |
c5d120f8 | 1720 | }; |
4c568017 | 1721 | int status; |
0076d7b7 CL |
1722 | |
1723 | if (args->mount_server.version == 0) { | |
8a6e5deb TM |
1724 | switch (args->version) { |
1725 | default: | |
1726 | args->mount_server.version = NFS_MNT3_VERSION; | |
1727 | break; | |
1728 | case 2: | |
1729 | args->mount_server.version = NFS_MNT_VERSION; | |
1730 | } | |
0076d7b7 | 1731 | } |
c5d120f8 | 1732 | request.version = args->mount_server.version; |
0076d7b7 | 1733 | |
33832034 | 1734 | if (args->mount_server.hostname) |
c5d120f8 | 1735 | request.hostname = args->mount_server.hostname; |
33832034 | 1736 | else |
c5d120f8 | 1737 | request.hostname = args->nfs_server.hostname; |
33832034 | 1738 | |
0076d7b7 CL |
1739 | /* |
1740 | * Construct the mount server's address. | |
1741 | */ | |
4c568017 | 1742 | if (args->mount_server.address.ss_family == AF_UNSPEC) { |
c5d120f8 | 1743 | memcpy(request.sap, &args->nfs_server.address, |
4c568017 CL |
1744 | args->nfs_server.addrlen); |
1745 | args->mount_server.addrlen = args->nfs_server.addrlen; | |
1746 | } | |
c5d120f8 | 1747 | request.salen = args->mount_server.addrlen; |
f5855fec | 1748 | nfs_set_port(request.sap, &args->mount_server.port, 0); |
0076d7b7 CL |
1749 | |
1750 | /* | |
1751 | * Now ask the mount server to map our export path | |
1752 | * to a file handle. | |
1753 | */ | |
c5d120f8 | 1754 | status = nfs_mount(&request); |
ec88f28d CL |
1755 | if (status != 0) { |
1756 | dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n", | |
1757 | request.hostname, status); | |
1758 | return status; | |
1759 | } | |
0076d7b7 | 1760 | |
ec88f28d CL |
1761 | /* |
1762 | * MNTv1 (NFSv2) does not support auth flavor negotiation. | |
1763 | */ | |
1764 | if (args->mount_server.version != NFS_MNT3_VERSION) | |
1765 | return 0; | |
1766 | return nfs_walk_authlist(args, &request); | |
0076d7b7 CL |
1767 | } |
1768 | ||
ff9099f2 BS |
1769 | struct dentry *nfs_try_mount(int flags, const char *dev_name, |
1770 | struct nfs_mount_info *mount_info, | |
1771 | struct nfs_subversion *nfs_mod) | |
486aa699 BS |
1772 | { |
1773 | int status; | |
1774 | struct nfs_server *server; | |
1775 | ||
b72e4f42 | 1776 | if (mount_info->parsed->need_mount) { |
87c7083d | 1777 | status = nfs_request_mount(mount_info->parsed, mount_info->mntfh); |
b72e4f42 BS |
1778 | if (status) |
1779 | return ERR_PTR(status); | |
1780 | } | |
486aa699 BS |
1781 | |
1782 | /* Get a volume representation */ | |
1179acc6 | 1783 | server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); |
486aa699 BS |
1784 | if (IS_ERR(server)) |
1785 | return ERR_CAST(server); | |
1786 | ||
ab7017a3 | 1787 | return nfs_fs_mount_common(server, flags, dev_name, mount_info, nfs_mod); |
486aa699 | 1788 | } |
ddda8e0a | 1789 | EXPORT_SYMBOL_GPL(nfs_try_mount); |
486aa699 | 1790 | |
c12bacec RL |
1791 | /* |
1792 | * Split "dev_name" into "hostname:export_path". | |
1793 | * | |
1794 | * The leftmost colon demarks the split between the server's hostname | |
1795 | * and the export path. If the hostname starts with a left square | |
1796 | * bracket, then it may contain colons. | |
1797 | * | |
1798 | * Note: caller frees hostname and export path, even on error. | |
1799 | */ | |
1800 | static int nfs_parse_devname(const char *dev_name, | |
1801 | char **hostname, size_t maxnamlen, | |
1802 | char **export_path, size_t maxpathlen) | |
dc045898 CL |
1803 | { |
1804 | size_t len; | |
c12bacec | 1805 | char *end; |
dc045898 | 1806 | |
c12bacec RL |
1807 | /* Is the host name protected with square brakcets? */ |
1808 | if (*dev_name == '[') { | |
1809 | end = strchr(++dev_name, ']'); | |
1810 | if (end == NULL || end[1] != ':') | |
dc045898 | 1811 | goto out_bad_devname; |
dc045898 | 1812 | |
c12bacec RL |
1813 | len = end - dev_name; |
1814 | end++; | |
1815 | } else { | |
1816 | char *comma; | |
dc045898 | 1817 | |
c12bacec RL |
1818 | end = strchr(dev_name, ':'); |
1819 | if (end == NULL) | |
1820 | goto out_bad_devname; | |
1821 | len = end - dev_name; | |
d1aa0825 | 1822 | |
c12bacec RL |
1823 | /* kill possible hostname list: not supported */ |
1824 | comma = strchr(dev_name, ','); | |
1825 | if (comma != NULL && comma < end) | |
1826 | *comma = 0; | |
1827 | } | |
d1aa0825 | 1828 | |
d1aa0825 CL |
1829 | if (len > maxnamlen) |
1830 | goto out_hostname; | |
1831 | ||
1832 | /* N.B. caller will free nfs_server.hostname in all cases */ | |
c12bacec | 1833 | *hostname = kstrndup(dev_name, len, GFP_KERNEL); |
d1aa0825 CL |
1834 | if (*hostname == NULL) |
1835 | goto out_nomem; | |
c12bacec | 1836 | len = strlen(++end); |
d1aa0825 CL |
1837 | if (len > maxpathlen) |
1838 | goto out_path; | |
1839 | *export_path = kstrndup(end, len, GFP_KERNEL); | |
1840 | if (!*export_path) | |
1841 | goto out_nomem; | |
1842 | ||
c12bacec | 1843 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path); |
d1aa0825 CL |
1844 | return 0; |
1845 | ||
1846 | out_bad_devname: | |
1847 | dfprintk(MOUNT, "NFS: device name not in host:path format\n"); | |
1848 | return -EINVAL; | |
1849 | ||
1850 | out_nomem: | |
1851 | dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); | |
1852 | return -ENOMEM; | |
1853 | ||
1854 | out_hostname: | |
1855 | dfprintk(MOUNT, "NFS: server hostname too long\n"); | |
1856 | return -ENAMETOOLONG; | |
1857 | ||
1858 | out_path: | |
1859 | dfprintk(MOUNT, "NFS: export pathname too long\n"); | |
1860 | return -ENAMETOOLONG; | |
1861 | } | |
1862 | ||
f7b422b1 | 1863 | /* |
54ceac45 DH |
1864 | * Validate the NFS2/NFS3 mount data |
1865 | * - fills in the mount root filehandle | |
136d558c CL |
1866 | * |
1867 | * For option strings, user space handles the following behaviors: | |
1868 | * | |
1869 | * + DNS: mapping server host name to IP address ("addr=" option) | |
1870 | * | |
1871 | * + failure mode: how to behave if a mount request can't be handled | |
1872 | * immediately ("fg/bg" option) | |
1873 | * | |
1874 | * + retry: how often to retry a mount request ("retry=" option) | |
1875 | * | |
1876 | * + breaking back: trying proto=udp after proto=tcp, v2 after v3, | |
1877 | * mountproto=tcp after mountproto=udp, and so on | |
f7b422b1 | 1878 | */ |
d72c727c BS |
1879 | static int nfs23_validate_mount_data(void *options, |
1880 | struct nfs_parsed_mount_data *args, | |
1881 | struct nfs_fh *mntfh, | |
1882 | const char *dev_name) | |
f7b422b1 | 1883 | { |
2283f8d6 | 1884 | struct nfs_mount_data *data = (struct nfs_mount_data *)options; |
4cfd74fc | 1885 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; |
136d558c | 1886 | |
5df36e78 CL |
1887 | if (data == NULL) |
1888 | goto out_no_data; | |
f7b422b1 | 1889 | |
c5afc8da | 1890 | args->version = NFS_DEFAULT_VERSION; |
54ceac45 | 1891 | switch (data->version) { |
5df36e78 CL |
1892 | case 1: |
1893 | data->namlen = 0; | |
1894 | case 2: | |
1895 | data->bsize = 0; | |
1896 | case 3: | |
1897 | if (data->flags & NFS_MOUNT_VER3) | |
1898 | goto out_no_v3; | |
1899 | data->root.size = NFS2_FHSIZE; | |
1900 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
1901 | case 4: | |
1902 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1903 | goto out_no_sec; | |
1904 | case 5: | |
1905 | memset(data->context, 0, sizeof(data->context)); | |
1906 | case 6: | |
b7e24457 TM |
1907 | if (data->flags & NFS_MOUNT_VER3) { |
1908 | if (data->root.size > NFS3_FHSIZE || data->root.size == 0) | |
1909 | goto out_invalid_fh; | |
5df36e78 | 1910 | mntfh->size = data->root.size; |
764302cc CL |
1911 | args->version = 3; |
1912 | } else { | |
5df36e78 | 1913 | mntfh->size = NFS2_FHSIZE; |
764302cc CL |
1914 | args->version = 2; |
1915 | } | |
5df36e78 | 1916 | |
5df36e78 CL |
1917 | |
1918 | memcpy(mntfh->data, data->root.data, mntfh->size); | |
1919 | if (mntfh->size < sizeof(mntfh->data)) | |
1920 | memset(mntfh->data + mntfh->size, 0, | |
1921 | sizeof(mntfh->data) - mntfh->size); | |
6e88e061 | 1922 | |
2283f8d6 TT |
1923 | /* |
1924 | * Translate to nfs_parsed_mount_data, which nfs_fill_super | |
1925 | * can deal with. | |
1926 | */ | |
ff3525a5 | 1927 | args->flags = data->flags & NFS_MOUNT_FLAGMASK; |
d5eff1a3 | 1928 | args->flags |= NFS_MOUNT_LEGACY_INTERFACE; |
2283f8d6 TT |
1929 | args->rsize = data->rsize; |
1930 | args->wsize = data->wsize; | |
2283f8d6 TT |
1931 | args->timeo = data->timeo; |
1932 | args->retrans = data->retrans; | |
1933 | args->acregmin = data->acregmin; | |
1934 | args->acregmax = data->acregmax; | |
1935 | args->acdirmin = data->acdirmin; | |
1936 | args->acdirmax = data->acdirmax; | |
b72e4f42 | 1937 | args->need_mount = false; |
4c568017 | 1938 | |
4cfd74fc | 1939 | memcpy(sap, &data->addr, sizeof(data->addr)); |
4c568017 | 1940 | args->nfs_server.addrlen = sizeof(data->addr); |
872ece86 | 1941 | args->nfs_server.port = ntohs(data->addr.sin_port); |
4cfd74fc | 1942 | if (!nfs_verify_server_address(sap)) |
4c568017 CL |
1943 | goto out_no_address; |
1944 | ||
2283f8d6 | 1945 | if (!(data->flags & NFS_MOUNT_TCP)) |
0896a725 | 1946 | args->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
2283f8d6 TT |
1947 | /* N.B. caller will free nfs_server.hostname in all cases */ |
1948 | args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); | |
1949 | args->namlen = data->namlen; | |
1950 | args->bsize = data->bsize; | |
dd07c947 CL |
1951 | |
1952 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1953 | args->auth_flavors[0] = data->pseudoflavor; | |
63649bd7 CG |
1954 | if (!args->nfs_server.hostname) |
1955 | goto out_nomem; | |
f9c3a380 | 1956 | |
5eebde23 SJ |
1957 | if (!(data->flags & NFS_MOUNT_NONLM)) |
1958 | args->flags &= ~(NFS_MOUNT_LOCAL_FLOCK| | |
1959 | NFS_MOUNT_LOCAL_FCNTL); | |
1960 | else | |
1961 | args->flags |= (NFS_MOUNT_LOCAL_FLOCK| | |
1962 | NFS_MOUNT_LOCAL_FCNTL); | |
f9c3a380 EP |
1963 | /* |
1964 | * The legacy version 6 binary mount data from userspace has a | |
1965 | * field used only to transport selinux information into the | |
1966 | * the kernel. To continue to support that functionality we | |
1967 | * have a touch of selinux knowledge here in the NFS code. The | |
1968 | * userspace code converted context=blah to just blah so we are | |
1969 | * converting back to the full string selinux understands. | |
1970 | */ | |
1971 | if (data->context[0]){ | |
1972 | #ifdef CONFIG_SECURITY_SELINUX | |
1973 | int rc; | |
1974 | char *opts_str = kmalloc(sizeof(data->context) + 8, GFP_KERNEL); | |
1975 | if (!opts_str) | |
1976 | return -ENOMEM; | |
1977 | strcpy(opts_str, "context="); | |
1978 | data->context[NFS_MAX_CONTEXT_LEN] = '\0'; | |
1979 | strcat(opts_str, &data->context[0]); | |
1980 | rc = security_sb_parse_opts_str(opts_str, &args->lsm_opts); | |
1981 | kfree(opts_str); | |
1982 | if (rc) | |
1983 | return rc; | |
1984 | #else | |
1985 | return -EINVAL; | |
1986 | #endif | |
1987 | } | |
1988 | ||
5df36e78 | 1989 | break; |
b72e4f42 BS |
1990 | default: |
1991 | return NFS_TEXT_DATA; | |
f7b422b1 | 1992 | } |
54ceac45 | 1993 | |
1c606fb7 | 1994 | #if !IS_ENABLED(CONFIG_NFS_V3) |
8a6e5deb | 1995 | if (args->version == 3) |
5df36e78 CL |
1996 | goto out_v3_not_compiled; |
1997 | #endif /* !CONFIG_NFS_V3 */ | |
f7b422b1 | 1998 | |
5df36e78 | 1999 | return 0; |
f7b422b1 | 2000 | |
5df36e78 CL |
2001 | out_no_data: |
2002 | dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); | |
2003 | return -EINVAL; | |
54ceac45 | 2004 | |
5df36e78 CL |
2005 | out_no_v3: |
2006 | dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", | |
2007 | data->version); | |
2008 | return -EINVAL; | |
f7b422b1 | 2009 | |
5df36e78 CL |
2010 | out_no_sec: |
2011 | dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); | |
2012 | return -EINVAL; | |
2013 | ||
1c606fb7 | 2014 | #if !IS_ENABLED(CONFIG_NFS_V3) |
5df36e78 CL |
2015 | out_v3_not_compiled: |
2016 | dfprintk(MOUNT, "NFS: NFSv3 is not compiled into kernel\n"); | |
2017 | return -EPROTONOSUPPORT; | |
2018 | #endif /* !CONFIG_NFS_V3 */ | |
2019 | ||
63649bd7 CG |
2020 | out_nomem: |
2021 | dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); | |
2022 | return -ENOMEM; | |
2023 | ||
5df36e78 CL |
2024 | out_no_address: |
2025 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); | |
2026 | return -EINVAL; | |
2027 | ||
2028 | out_invalid_fh: | |
2029 | dfprintk(MOUNT, "NFS: invalid root filehandle\n"); | |
2030 | return -EINVAL; | |
f7b422b1 DH |
2031 | } |
2032 | ||
89d77c8f | 2033 | #if IS_ENABLED(CONFIG_NFS_V4) |
d72c727c BS |
2034 | static int nfs_validate_mount_data(struct file_system_type *fs_type, |
2035 | void *options, | |
2036 | struct nfs_parsed_mount_data *args, | |
2037 | struct nfs_fh *mntfh, | |
2038 | const char *dev_name) | |
2039 | { | |
2040 | if (fs_type == &nfs_fs_type) | |
2041 | return nfs23_validate_mount_data(options, args, mntfh, dev_name); | |
2042 | return nfs4_validate_mount_data(options, args, dev_name); | |
2043 | } | |
2044 | #else | |
2045 | static int nfs_validate_mount_data(struct file_system_type *fs_type, | |
2046 | void *options, | |
2047 | struct nfs_parsed_mount_data *args, | |
2048 | struct nfs_fh *mntfh, | |
2049 | const char *dev_name) | |
2050 | { | |
2051 | return nfs23_validate_mount_data(options, args, mntfh, dev_name); | |
2052 | } | |
2053 | #endif | |
2054 | ||
b72e4f42 BS |
2055 | static int nfs_validate_text_mount_data(void *options, |
2056 | struct nfs_parsed_mount_data *args, | |
2057 | const char *dev_name) | |
2058 | { | |
2059 | int port = 0; | |
2060 | int max_namelen = PAGE_SIZE; | |
2061 | int max_pathlen = NFS_MAXPATHLEN; | |
2062 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; | |
2063 | ||
2064 | if (nfs_parse_mount_options((char *)options, args) == 0) | |
2065 | return -EINVAL; | |
2066 | ||
2067 | if (!nfs_verify_server_address(sap)) | |
2068 | goto out_no_address; | |
2069 | ||
2070 | if (args->version == 4) { | |
89d77c8f | 2071 | #if IS_ENABLED(CONFIG_NFS_V4) |
b72e4f42 BS |
2072 | port = NFS_PORT; |
2073 | max_namelen = NFS4_MAXNAMLEN; | |
2074 | max_pathlen = NFS4_MAXPATHLEN; | |
2075 | nfs_validate_transport_protocol(args); | |
2076 | nfs4_validate_mount_flags(args); | |
2077 | #else | |
2078 | goto out_v4_not_compiled; | |
2079 | #endif /* CONFIG_NFS_V4 */ | |
2080 | } else | |
2081 | nfs_set_mount_transport_protocol(args); | |
2082 | ||
2083 | nfs_set_port(sap, &args->nfs_server.port, port); | |
2084 | ||
2085 | if (args->auth_flavor_len > 1) | |
2086 | goto out_bad_auth; | |
2087 | ||
2088 | return nfs_parse_devname(dev_name, | |
2089 | &args->nfs_server.hostname, | |
2090 | max_namelen, | |
2091 | &args->nfs_server.export_path, | |
2092 | max_pathlen); | |
2093 | ||
89d77c8f | 2094 | #if !IS_ENABLED(CONFIG_NFS_V4) |
b72e4f42 BS |
2095 | out_v4_not_compiled: |
2096 | dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); | |
2097 | return -EPROTONOSUPPORT; | |
2098 | #endif /* !CONFIG_NFS_V4 */ | |
2099 | ||
2100 | out_no_address: | |
2101 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); | |
2102 | return -EINVAL; | |
2103 | ||
2104 | out_bad_auth: | |
2105 | dfprintk(MOUNT, "NFS: Too many RPC auth flavours specified\n"); | |
2106 | return -EINVAL; | |
2107 | } | |
2108 | ||
48b605f8 JL |
2109 | static int |
2110 | nfs_compare_remount_data(struct nfs_server *nfss, | |
2111 | struct nfs_parsed_mount_data *data) | |
2112 | { | |
2113 | if (data->flags != nfss->flags || | |
2114 | data->rsize != nfss->rsize || | |
2115 | data->wsize != nfss->wsize || | |
2116 | data->retrans != nfss->client->cl_timeout->to_retries || | |
2117 | data->auth_flavors[0] != nfss->client->cl_auth->au_flavor || | |
2118 | data->acregmin != nfss->acregmin / HZ || | |
2119 | data->acregmax != nfss->acregmax / HZ || | |
2120 | data->acdirmin != nfss->acdirmin / HZ || | |
2121 | data->acdirmax != nfss->acdirmax / HZ || | |
2122 | data->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) || | |
bcd2ea17 | 2123 | data->nfs_server.port != nfss->port || |
48b605f8 | 2124 | data->nfs_server.addrlen != nfss->nfs_client->cl_addrlen || |
a1be9eee SR |
2125 | !rpc_cmp_addr((struct sockaddr *)&data->nfs_server.address, |
2126 | (struct sockaddr *)&nfss->nfs_client->cl_addr)) | |
48b605f8 JL |
2127 | return -EINVAL; |
2128 | ||
2129 | return 0; | |
2130 | } | |
2131 | ||
fbdefd64 | 2132 | int |
48b605f8 JL |
2133 | nfs_remount(struct super_block *sb, int *flags, char *raw_data) |
2134 | { | |
2135 | int error; | |
2136 | struct nfs_server *nfss = sb->s_fs_info; | |
2137 | struct nfs_parsed_mount_data *data; | |
2138 | struct nfs_mount_data *options = (struct nfs_mount_data *)raw_data; | |
2139 | struct nfs4_mount_data *options4 = (struct nfs4_mount_data *)raw_data; | |
cd100725 | 2140 | u32 nfsvers = nfss->nfs_client->rpc_ops->version; |
48b605f8 JL |
2141 | |
2142 | /* | |
2143 | * Userspace mount programs that send binary options generally send | |
2144 | * them populated with default values. We have no way to know which | |
2145 | * ones were explicitly specified. Fall back to legacy behavior and | |
2146 | * just return success. | |
2147 | */ | |
31c94469 MZ |
2148 | if ((nfsvers == 4 && (!options4 || options4->version == 1)) || |
2149 | (nfsvers <= 3 && (!options || (options->version >= 1 && | |
2150 | options->version <= 6)))) | |
48b605f8 JL |
2151 | return 0; |
2152 | ||
2153 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2154 | if (data == NULL) | |
2155 | return -ENOMEM; | |
2156 | ||
2157 | /* fill out struct with values from existing mount */ | |
2158 | data->flags = nfss->flags; | |
2159 | data->rsize = nfss->rsize; | |
2160 | data->wsize = nfss->wsize; | |
2161 | data->retrans = nfss->client->cl_timeout->to_retries; | |
2162 | data->auth_flavors[0] = nfss->client->cl_auth->au_flavor; | |
2163 | data->acregmin = nfss->acregmin / HZ; | |
2164 | data->acregmax = nfss->acregmax / HZ; | |
2165 | data->acdirmin = nfss->acdirmin / HZ; | |
2166 | data->acdirmax = nfss->acdirmax / HZ; | |
2167 | data->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; | |
bcd2ea17 | 2168 | data->nfs_server.port = nfss->port; |
48b605f8 JL |
2169 | data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; |
2170 | memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr, | |
2171 | data->nfs_server.addrlen); | |
2172 | ||
2173 | /* overwrite those values with any that were specified */ | |
2174 | error = nfs_parse_mount_options((char *)options, data); | |
2175 | if (error < 0) | |
2176 | goto out; | |
2177 | ||
26c4c170 JL |
2178 | /* |
2179 | * noac is a special case. It implies -o sync, but that's not | |
2180 | * necessarily reflected in the mtab options. do_remount_sb | |
2181 | * will clear MS_SYNCHRONOUS if -o sync wasn't specified in the | |
2182 | * remount options, so we have to explicitly reset it. | |
2183 | */ | |
2184 | if (data->flags & NFS_MOUNT_NOAC) | |
2185 | *flags |= MS_SYNCHRONOUS; | |
2186 | ||
48b605f8 JL |
2187 | /* compare new mount options with old ones */ |
2188 | error = nfs_compare_remount_data(nfss, data); | |
2189 | out: | |
2190 | kfree(data); | |
2191 | return error; | |
2192 | } | |
89d77c8f | 2193 | EXPORT_SYMBOL_GPL(nfs_remount); |
48b605f8 | 2194 | |
f7b422b1 | 2195 | /* |
54ceac45 | 2196 | * Initialise the common bits of the superblock |
f7b422b1 | 2197 | */ |
fbdefd64 | 2198 | inline void nfs_initialise_sb(struct super_block *sb) |
f7b422b1 | 2199 | { |
54ceac45 | 2200 | struct nfs_server *server = NFS_SB(sb); |
5006a76c | 2201 | |
54ceac45 | 2202 | sb->s_magic = NFS_SUPER_MAGIC; |
f7b422b1 | 2203 | |
54ceac45 DH |
2204 | /* We probably want something more informative here */ |
2205 | snprintf(sb->s_id, sizeof(sb->s_id), | |
5a7c9eec | 2206 | "%u:%u", MAJOR(sb->s_dev), MINOR(sb->s_dev)); |
5006a76c | 2207 | |
54ceac45 DH |
2208 | if (sb->s_blocksize == 0) |
2209 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
2210 | &sb->s_blocksize_bits); | |
f7b422b1 | 2211 | |
32a88aa1 JA |
2212 | sb->s_bdi = &server->backing_dev_info; |
2213 | ||
54ceac45 | 2214 | nfs_super_set_maxbytes(sb, server->maxfilesize); |
f7b422b1 DH |
2215 | } |
2216 | ||
2217 | /* | |
54ceac45 | 2218 | * Finish setting up an NFS2/3 superblock |
f7b422b1 | 2219 | */ |
fbdefd64 | 2220 | void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_info) |
f7b422b1 | 2221 | { |
c40f8d1d | 2222 | struct nfs_parsed_mount_data *data = mount_info->parsed; |
f7b422b1 | 2223 | struct nfs_server *server = NFS_SB(sb); |
5006a76c | 2224 | |
54ceac45 DH |
2225 | sb->s_blocksize_bits = 0; |
2226 | sb->s_blocksize = 0; | |
6a74490d BS |
2227 | sb->s_xattr = server->nfs_client->cl_nfs_mod->xattr; |
2228 | sb->s_op = server->nfs_client->cl_nfs_mod->sops; | |
2229 | if (data && data->bsize) | |
54ceac45 | 2230 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); |
f7b422b1 | 2231 | |
6a74490d | 2232 | if (server->nfs_client->rpc_ops->version != 2) { |
54ceac45 DH |
2233 | /* The VFS shouldn't apply the umask to mode bits. We will do |
2234 | * so ourselves when necessary. | |
2235 | */ | |
2236 | sb->s_flags |= MS_POSIXACL; | |
2237 | sb->s_time_gran = 1; | |
816724e6 | 2238 | } |
54ceac45 | 2239 | |
54ceac45 | 2240 | nfs_initialise_sb(sb); |
f7b422b1 | 2241 | } |
89d77c8f | 2242 | EXPORT_SYMBOL_GPL(nfs_fill_super); |
f7b422b1 DH |
2243 | |
2244 | /* | |
3cadf4b8 | 2245 | * Finish setting up a cloned NFS2/3/4 superblock |
f7b422b1 | 2246 | */ |
fbdefd64 | 2247 | void nfs_clone_super(struct super_block *sb, struct nfs_mount_info *mount_info) |
f7b422b1 | 2248 | { |
8c958e0c | 2249 | const struct super_block *old_sb = mount_info->cloned->sb; |
54ceac45 DH |
2250 | struct nfs_server *server = NFS_SB(sb); |
2251 | ||
2252 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; | |
2253 | sb->s_blocksize = old_sb->s_blocksize; | |
2254 | sb->s_maxbytes = old_sb->s_maxbytes; | |
3cadf4b8 BS |
2255 | sb->s_xattr = old_sb->s_xattr; |
2256 | sb->s_op = old_sb->s_op; | |
2257 | sb->s_time_gran = 1; | |
f7b422b1 | 2258 | |
3cadf4b8 | 2259 | if (server->nfs_client->rpc_ops->version != 2) { |
54ceac45 DH |
2260 | /* The VFS shouldn't apply the umask to mode bits. We will do |
2261 | * so ourselves when necessary. | |
f7b422b1 DH |
2262 | */ |
2263 | sb->s_flags |= MS_POSIXACL; | |
f7b422b1 DH |
2264 | } |
2265 | ||
54ceac45 | 2266 | nfs_initialise_sb(sb); |
f7b422b1 DH |
2267 | } |
2268 | ||
275a5d24 TM |
2269 | static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags) |
2270 | { | |
2271 | const struct nfs_server *a = s->s_fs_info; | |
2272 | const struct rpc_clnt *clnt_a = a->client; | |
2273 | const struct rpc_clnt *clnt_b = b->client; | |
2274 | ||
2275 | if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK)) | |
2276 | goto Ebusy; | |
2277 | if (a->nfs_client != b->nfs_client) | |
2278 | goto Ebusy; | |
2279 | if (a->flags != b->flags) | |
2280 | goto Ebusy; | |
2281 | if (a->wsize != b->wsize) | |
2282 | goto Ebusy; | |
2283 | if (a->rsize != b->rsize) | |
2284 | goto Ebusy; | |
2285 | if (a->acregmin != b->acregmin) | |
2286 | goto Ebusy; | |
2287 | if (a->acregmax != b->acregmax) | |
2288 | goto Ebusy; | |
2289 | if (a->acdirmin != b->acdirmin) | |
2290 | goto Ebusy; | |
2291 | if (a->acdirmax != b->acdirmax) | |
2292 | goto Ebusy; | |
2293 | if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) | |
2294 | goto Ebusy; | |
e89a5a43 | 2295 | return 1; |
275a5d24 | 2296 | Ebusy: |
e89a5a43 TM |
2297 | return 0; |
2298 | } | |
2299 | ||
2300 | struct nfs_sb_mountdata { | |
2301 | struct nfs_server *server; | |
2302 | int mntflags; | |
2303 | }; | |
2304 | ||
2305 | static int nfs_set_super(struct super_block *s, void *data) | |
2306 | { | |
2307 | struct nfs_sb_mountdata *sb_mntdata = data; | |
2308 | struct nfs_server *server = sb_mntdata->server; | |
2309 | int ret; | |
2310 | ||
2311 | s->s_flags = sb_mntdata->mntflags; | |
2312 | s->s_fs_info = server; | |
8b244ff2 | 2313 | s->s_d_op = server->nfs_client->rpc_ops->dentry_ops; |
e89a5a43 TM |
2314 | ret = set_anon_super(s, server); |
2315 | if (ret == 0) | |
2316 | server->s_dev = s->s_dev; | |
2317 | return ret; | |
2318 | } | |
2319 | ||
fd00a8ff CL |
2320 | static int nfs_compare_super_address(struct nfs_server *server1, |
2321 | struct nfs_server *server2) | |
2322 | { | |
2323 | struct sockaddr *sap1, *sap2; | |
2324 | ||
2325 | sap1 = (struct sockaddr *)&server1->nfs_client->cl_addr; | |
2326 | sap2 = (struct sockaddr *)&server2->nfs_client->cl_addr; | |
2327 | ||
2328 | if (sap1->sa_family != sap2->sa_family) | |
2329 | return 0; | |
2330 | ||
2331 | switch (sap1->sa_family) { | |
2332 | case AF_INET: { | |
2333 | struct sockaddr_in *sin1 = (struct sockaddr_in *)sap1; | |
2334 | struct sockaddr_in *sin2 = (struct sockaddr_in *)sap2; | |
2335 | if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) | |
2336 | return 0; | |
2337 | if (sin1->sin_port != sin2->sin_port) | |
2338 | return 0; | |
2339 | break; | |
2340 | } | |
2341 | case AF_INET6: { | |
2342 | struct sockaddr_in6 *sin1 = (struct sockaddr_in6 *)sap1; | |
2343 | struct sockaddr_in6 *sin2 = (struct sockaddr_in6 *)sap2; | |
2344 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) | |
2345 | return 0; | |
2346 | if (sin1->sin6_port != sin2->sin6_port) | |
2347 | return 0; | |
2348 | break; | |
2349 | } | |
2350 | default: | |
2351 | return 0; | |
2352 | } | |
2353 | ||
2354 | return 1; | |
2355 | } | |
2356 | ||
e89a5a43 TM |
2357 | static int nfs_compare_super(struct super_block *sb, void *data) |
2358 | { | |
2359 | struct nfs_sb_mountdata *sb_mntdata = data; | |
2360 | struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb); | |
2361 | int mntflags = sb_mntdata->mntflags; | |
2362 | ||
fd00a8ff | 2363 | if (!nfs_compare_super_address(old, server)) |
e89a5a43 TM |
2364 | return 0; |
2365 | /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */ | |
2366 | if (old->flags & NFS_MOUNT_UNSHARED) | |
2367 | return 0; | |
2368 | if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0) | |
2369 | return 0; | |
2370 | return nfs_compare_mount_options(sb, server, mntflags); | |
275a5d24 TM |
2371 | } |
2372 | ||
39ffb921 | 2373 | #ifdef CONFIG_NFS_FSCACHE |
2311b943 BS |
2374 | static void nfs_get_cache_cookie(struct super_block *sb, |
2375 | struct nfs_parsed_mount_data *parsed, | |
2376 | struct nfs_clone_mount *cloned) | |
2377 | { | |
c4271c6e | 2378 | struct nfs_server *nfss = NFS_SB(sb); |
2311b943 BS |
2379 | char *uniq = NULL; |
2380 | int ulen = 0; | |
2381 | ||
c4271c6e TM |
2382 | nfss->fscache_key = NULL; |
2383 | nfss->fscache = NULL; | |
2384 | ||
2385 | if (parsed) { | |
2386 | if (!(parsed->options & NFS_OPTION_FSCACHE)) | |
2387 | return; | |
2388 | if (parsed->fscache_uniq) { | |
2389 | uniq = parsed->fscache_uniq; | |
2390 | ulen = strlen(parsed->fscache_uniq); | |
2391 | } | |
2311b943 BS |
2392 | } else if (cloned) { |
2393 | struct nfs_server *mnt_s = NFS_SB(cloned->sb); | |
c4271c6e TM |
2394 | if (!(mnt_s->options & NFS_OPTION_FSCACHE)) |
2395 | return; | |
2311b943 BS |
2396 | if (mnt_s->fscache_key) { |
2397 | uniq = mnt_s->fscache_key->key.uniquifier; | |
2398 | ulen = mnt_s->fscache_key->key.uniq_len; | |
2399 | }; | |
c4271c6e TM |
2400 | } else |
2401 | return; | |
2311b943 BS |
2402 | |
2403 | nfs_fscache_get_super_cookie(sb, uniq, ulen); | |
2404 | } | |
39ffb921 TM |
2405 | #else |
2406 | static void nfs_get_cache_cookie(struct super_block *sb, | |
2407 | struct nfs_parsed_mount_data *parsed, | |
2408 | struct nfs_clone_mount *cloned) | |
2409 | { | |
2410 | } | |
2411 | #endif | |
2311b943 | 2412 | |
fa799759 MS |
2413 | static int nfs_bdi_register(struct nfs_server *server) |
2414 | { | |
2415 | return bdi_register_dev(&server->backing_dev_info, server->s_dev); | |
2416 | } | |
2417 | ||
fbdefd64 BS |
2418 | int nfs_set_sb_security(struct super_block *s, struct dentry *mntroot, |
2419 | struct nfs_mount_info *mount_info) | |
3d176e3f BS |
2420 | { |
2421 | return security_sb_set_mnt_opts(s, &mount_info->parsed->lsm_opts); | |
2422 | } | |
89d77c8f | 2423 | EXPORT_SYMBOL_GPL(nfs_set_sb_security); |
3d176e3f | 2424 | |
fbdefd64 BS |
2425 | int nfs_clone_sb_security(struct super_block *s, struct dentry *mntroot, |
2426 | struct nfs_mount_info *mount_info) | |
3d176e3f BS |
2427 | { |
2428 | /* clone any lsm security options from the parent to the new sb */ | |
2429 | security_sb_clone_mnt_opts(mount_info->cloned->sb, s); | |
2430 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) | |
2431 | return -ESTALE; | |
2432 | return 0; | |
2433 | } | |
89d77c8f | 2434 | EXPORT_SYMBOL_GPL(nfs_clone_sb_security); |
3d176e3f | 2435 | |
ab7017a3 | 2436 | struct dentry *nfs_fs_mount_common(struct nfs_server *server, |
fbdefd64 | 2437 | int flags, const char *dev_name, |
ab7017a3 BS |
2438 | struct nfs_mount_info *mount_info, |
2439 | struct nfs_subversion *nfs_mod) | |
f7b422b1 | 2440 | { |
f7b422b1 | 2441 | struct super_block *s; |
01194981 | 2442 | struct dentry *mntroot = ERR_PTR(-ENOMEM); |
75180df2 | 2443 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2444 | struct nfs_sb_mountdata sb_mntdata = { |
2445 | .mntflags = flags, | |
c40f8d1d | 2446 | .server = server, |
e89a5a43 | 2447 | }; |
01194981 | 2448 | int error; |
33852a1f | 2449 | |
75180df2 TM |
2450 | if (server->flags & NFS_MOUNT_UNSHARED) |
2451 | compare_super = NULL; | |
2452 | ||
fb2088cc SP |
2453 | /* -o noac implies -o sync */ |
2454 | if (server->flags & NFS_MOUNT_NOAC) | |
2455 | sb_mntdata.mntflags |= MS_SYNCHRONOUS; | |
2456 | ||
54ceac45 | 2457 | /* Get a superblock - note that we may end up sharing one that already exists */ |
ab7017a3 | 2458 | s = sget(nfs_mod->nfs_fs, compare_super, nfs_set_super, flags, &sb_mntdata); |
816724e6 | 2459 | if (IS_ERR(s)) { |
01194981 | 2460 | mntroot = ERR_CAST(s); |
54ceac45 | 2461 | goto out_err_nosb; |
816724e6 TM |
2462 | } |
2463 | ||
54ceac45 DH |
2464 | if (s->s_fs_info != server) { |
2465 | nfs_free_server(server); | |
2466 | server = NULL; | |
fa799759 MS |
2467 | } else { |
2468 | error = nfs_bdi_register(server); | |
01194981 AV |
2469 | if (error) { |
2470 | mntroot = ERR_PTR(error); | |
cfbc0683 | 2471 | goto error_splat_bdi; |
01194981 | 2472 | } |
54ceac45 | 2473 | } |
f7b422b1 | 2474 | |
54ceac45 DH |
2475 | if (!s->s_root) { |
2476 | /* initial superblock/root creation */ | |
c40f8d1d | 2477 | mount_info->fill_super(s, mount_info); |
3d176e3f | 2478 | nfs_get_cache_cookie(s, mount_info->parsed, mount_info->cloned); |
54ceac45 | 2479 | } |
f7b422b1 | 2480 | |
87c7083d | 2481 | mntroot = nfs_get_root(s, mount_info->mntfh, dev_name); |
01194981 | 2482 | if (IS_ERR(mntroot)) |
54ceac45 | 2483 | goto error_splat_super; |
816724e6 | 2484 | |
3d176e3f | 2485 | error = mount_info->set_security(s, mntroot, mount_info); |
f9c3a380 EP |
2486 | if (error) |
2487 | goto error_splat_root; | |
2488 | ||
54ceac45 | 2489 | s->s_flags |= MS_ACTIVE; |
0655960f CL |
2490 | |
2491 | out: | |
01194981 | 2492 | return mntroot; |
816724e6 | 2493 | |
54ceac45 DH |
2494 | out_err_nosb: |
2495 | nfs_free_server(server); | |
0655960f | 2496 | goto out; |
54ceac45 | 2497 | |
f9c3a380 EP |
2498 | error_splat_root: |
2499 | dput(mntroot); | |
01194981 | 2500 | mntroot = ERR_PTR(error); |
54ceac45 | 2501 | error_splat_super: |
cfbc0683 N |
2502 | if (server && !s->s_root) |
2503 | bdi_unregister(&server->backing_dev_info); | |
2504 | error_splat_bdi: | |
6f5bbff9 | 2505 | deactivate_locked_super(s); |
0655960f | 2506 | goto out; |
f7b422b1 | 2507 | } |
89d77c8f | 2508 | EXPORT_SYMBOL_GPL(nfs_fs_mount_common); |
f7b422b1 | 2509 | |
fbdefd64 | 2510 | struct dentry *nfs_fs_mount(struct file_system_type *fs_type, |
c40f8d1d BS |
2511 | int flags, const char *dev_name, void *raw_data) |
2512 | { | |
c40f8d1d BS |
2513 | struct nfs_mount_info mount_info = { |
2514 | .fill_super = nfs_fill_super, | |
3d176e3f | 2515 | .set_security = nfs_set_sb_security, |
c40f8d1d | 2516 | }; |
c40f8d1d | 2517 | struct dentry *mntroot = ERR_PTR(-ENOMEM); |
ab7017a3 | 2518 | struct nfs_subversion *nfs_mod; |
c40f8d1d BS |
2519 | int error; |
2520 | ||
46058d46 | 2521 | mount_info.parsed = nfs_alloc_parsed_mount_data(); |
87c7083d BS |
2522 | mount_info.mntfh = nfs_alloc_fhandle(); |
2523 | if (mount_info.parsed == NULL || mount_info.mntfh == NULL) | |
c40f8d1d BS |
2524 | goto out; |
2525 | ||
2526 | /* Validate the mount data */ | |
87c7083d | 2527 | error = nfs_validate_mount_data(fs_type, raw_data, mount_info.parsed, mount_info.mntfh, dev_name); |
b72e4f42 | 2528 | if (error == NFS_TEXT_DATA) |
46058d46 | 2529 | error = nfs_validate_text_mount_data(raw_data, mount_info.parsed, dev_name); |
c40f8d1d BS |
2530 | if (error < 0) { |
2531 | mntroot = ERR_PTR(error); | |
2532 | goto out; | |
2533 | } | |
c40f8d1d | 2534 | |
ab7017a3 BS |
2535 | nfs_mod = get_nfs_version(mount_info.parsed->version); |
2536 | if (IS_ERR(nfs_mod)) { | |
2537 | mntroot = ERR_CAST(nfs_mod); | |
2538 | goto out; | |
2539 | } | |
2540 | ||
ff9099f2 | 2541 | mntroot = nfs_mod->rpc_ops->try_mount(flags, dev_name, &mount_info, nfs_mod); |
ab7017a3 BS |
2542 | |
2543 | put_nfs_version(nfs_mod); | |
c40f8d1d | 2544 | out: |
46058d46 | 2545 | nfs_free_parsed_mount_data(mount_info.parsed); |
87c7083d | 2546 | nfs_free_fhandle(mount_info.mntfh); |
c40f8d1d BS |
2547 | return mntroot; |
2548 | } | |
89d77c8f | 2549 | EXPORT_SYMBOL_GPL(nfs_fs_mount); |
c40f8d1d | 2550 | |
387c149b TM |
2551 | /* |
2552 | * Ensure that we unregister the bdi before kill_anon_super | |
2553 | * releases the device name | |
2554 | */ | |
fbdefd64 | 2555 | void nfs_put_super(struct super_block *s) |
387c149b TM |
2556 | { |
2557 | struct nfs_server *server = NFS_SB(s); | |
2558 | ||
2559 | bdi_unregister(&server->backing_dev_info); | |
2560 | } | |
89d77c8f | 2561 | EXPORT_SYMBOL_GPL(nfs_put_super); |
387c149b | 2562 | |
54ceac45 DH |
2563 | /* |
2564 | * Destroy an NFS2/3 superblock | |
2565 | */ | |
fbdefd64 | 2566 | void nfs_kill_super(struct super_block *s) |
f7b422b1 DH |
2567 | { |
2568 | struct nfs_server *server = NFS_SB(s); | |
2569 | ||
2570 | kill_anon_super(s); | |
08734048 | 2571 | nfs_fscache_release_super_cookie(s); |
54ceac45 | 2572 | nfs_free_server(server); |
f7b422b1 | 2573 | } |
89d77c8f | 2574 | EXPORT_SYMBOL_GPL(nfs_kill_super); |
f7b422b1 | 2575 | |
54ceac45 | 2576 | /* |
8c958e0c | 2577 | * Clone an NFS2/3/4 server record on xdev traversal (FSID-change) |
54ceac45 | 2578 | */ |
3dd4f8ef | 2579 | static struct dentry * |
e8f25e6d BS |
2580 | nfs_xdev_mount(struct file_system_type *fs_type, int flags, |
2581 | const char *dev_name, void *raw_data) | |
f7b422b1 | 2582 | { |
e8f25e6d BS |
2583 | struct nfs_clone_mount *data = raw_data; |
2584 | struct nfs_mount_info mount_info = { | |
2585 | .fill_super = nfs_clone_super, | |
2586 | .set_security = nfs_clone_sb_security, | |
2587 | .cloned = data, | |
2588 | }; | |
54ceac45 | 2589 | struct nfs_server *server; |
3d176e3f | 2590 | struct dentry *mntroot = ERR_PTR(-ENOMEM); |
ab7017a3 | 2591 | struct nfs_subversion *nfs_mod = NFS_SB(data->sb)->nfs_client->cl_nfs_mod; |
54ceac45 | 2592 | int error; |
f7b422b1 | 2593 | |
8c958e0c | 2594 | dprintk("--> nfs_xdev_mount_common()\n"); |
f7b422b1 | 2595 | |
e8f25e6d | 2596 | mount_info.mntfh = mount_info.cloned->fh; |
87c7083d | 2597 | |
54ceac45 | 2598 | /* create a new volume representation */ |
1179acc6 | 2599 | server = nfs_mod->rpc_ops->clone_server(NFS_SB(data->sb), data->fh, data->fattr, data->authflavor); |
54ceac45 DH |
2600 | if (IS_ERR(server)) { |
2601 | error = PTR_ERR(server); | |
3d176e3f | 2602 | goto out_err; |
4c1fe2f7 | 2603 | } |
f7b422b1 | 2604 | |
e8f25e6d | 2605 | mntroot = nfs_fs_mount_common(server, flags, dev_name, &mount_info, nfs_mod); |
8c958e0c | 2606 | dprintk("<-- nfs_xdev_mount_common() = 0\n"); |
3d176e3f | 2607 | out: |
31f43471 | 2608 | return mntroot; |
24c8dbbb | 2609 | |
3d176e3f | 2610 | out_err: |
8c958e0c | 2611 | dprintk("<-- nfs_xdev_mount_common() = %d [error]\n", error); |
3d176e3f | 2612 | goto out; |
f7b422b1 DH |
2613 | } |
2614 | ||
89d77c8f | 2615 | #if IS_ENABLED(CONFIG_NFS_V4) |
54ceac45 | 2616 | |
01c3f052 TM |
2617 | static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) |
2618 | { | |
5eebde23 SJ |
2619 | args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3| |
2620 | NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL); | |
01c3f052 TM |
2621 | } |
2622 | ||
f0768ebd CL |
2623 | /* |
2624 | * Validate NFSv4 mount options | |
2625 | */ | |
91ea40b9 TT |
2626 | static int nfs4_validate_mount_data(void *options, |
2627 | struct nfs_parsed_mount_data *args, | |
2628 | const char *dev_name) | |
f0768ebd | 2629 | { |
4cfd74fc | 2630 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; |
91ea40b9 | 2631 | struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; |
f0768ebd CL |
2632 | char *c; |
2633 | ||
2634 | if (data == NULL) | |
2635 | goto out_no_data; | |
2636 | ||
cdf66442 BS |
2637 | args->version = 4; |
2638 | ||
f0768ebd CL |
2639 | switch (data->version) { |
2640 | case 1: | |
4c568017 CL |
2641 | if (data->host_addrlen > sizeof(args->nfs_server.address)) |
2642 | goto out_no_address; | |
2643 | if (data->host_addrlen == 0) | |
f0768ebd | 2644 | goto out_no_address; |
4c568017 | 2645 | args->nfs_server.addrlen = data->host_addrlen; |
4cfd74fc | 2646 | if (copy_from_user(sap, data->host_addr, data->host_addrlen)) |
f0768ebd | 2647 | return -EFAULT; |
4cfd74fc | 2648 | if (!nfs_verify_server_address(sap)) |
f0768ebd | 2649 | goto out_no_address; |
872ece86 | 2650 | args->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port); |
f0768ebd | 2651 | |
6738b251 CL |
2652 | if (data->auth_flavourlen) { |
2653 | if (data->auth_flavourlen > 1) | |
2654 | goto out_inval_auth; | |
20c71f5e | 2655 | if (copy_from_user(&args->auth_flavors[0], |
91ea40b9 | 2656 | data->auth_flavours, |
20c71f5e | 2657 | sizeof(args->auth_flavors[0]))) |
f0768ebd | 2658 | return -EFAULT; |
f0768ebd CL |
2659 | } |
2660 | ||
2661 | c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); | |
2662 | if (IS_ERR(c)) | |
2663 | return PTR_ERR(c); | |
91ea40b9 | 2664 | args->nfs_server.hostname = c; |
f0768ebd CL |
2665 | |
2666 | c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); | |
2667 | if (IS_ERR(c)) | |
2668 | return PTR_ERR(c); | |
91ea40b9 TT |
2669 | args->nfs_server.export_path = c; |
2670 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); | |
f0768ebd CL |
2671 | |
2672 | c = strndup_user(data->client_addr.data, 16); | |
2673 | if (IS_ERR(c)) | |
2674 | return PTR_ERR(c); | |
91ea40b9 TT |
2675 | args->client_address = c; |
2676 | ||
2677 | /* | |
2678 | * Translate to nfs_parsed_mount_data, which nfs4_fill_super | |
2679 | * can deal with. | |
2680 | */ | |
2681 | ||
2682 | args->flags = data->flags & NFS4_MOUNT_FLAGMASK; | |
2683 | args->rsize = data->rsize; | |
2684 | args->wsize = data->wsize; | |
2685 | args->timeo = data->timeo; | |
2686 | args->retrans = data->retrans; | |
2687 | args->acregmin = data->acregmin; | |
2688 | args->acregmax = data->acregmax; | |
2689 | args->acdirmin = data->acdirmin; | |
2690 | args->acdirmax = data->acdirmax; | |
2691 | args->nfs_server.protocol = data->proto; | |
259875ef | 2692 | nfs_validate_transport_protocol(args); |
f0768ebd CL |
2693 | |
2694 | break; | |
7630c852 | 2695 | default: |
b72e4f42 | 2696 | return NFS_TEXT_DATA; |
f0768ebd CL |
2697 | } |
2698 | ||
2699 | return 0; | |
2700 | ||
2701 | out_no_data: | |
2702 | dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); | |
2703 | return -EINVAL; | |
2704 | ||
2705 | out_inval_auth: | |
2706 | dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", | |
2707 | data->auth_flavourlen); | |
2708 | return -EINVAL; | |
2709 | ||
2710 | out_no_address: | |
2711 | dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); | |
2712 | return -EINVAL; | |
f0768ebd CL |
2713 | } |
2714 | ||
fac1e8e4 BS |
2715 | /* |
2716 | * NFS v4 module parameters need to stay in the | |
2717 | * NFS client for backwards compatibility | |
2718 | */ | |
2719 | unsigned int nfs_callback_set_tcpport; | |
2720 | unsigned short nfs_callback_tcpport; | |
2721 | /* Default cache timeout is 10 minutes */ | |
2722 | unsigned int nfs_idmap_cache_timeout = 600; | |
2723 | /* Turn off NFSv4 uid/gid mapping when using AUTH_SYS */ | |
2724 | bool nfs4_disable_idmapping = true; | |
2725 | unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE; | |
2726 | unsigned short send_implementation_id = 1; | |
6f2ea7f2 | 2727 | char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN] = ""; |
fac1e8e4 | 2728 | |
89d77c8f BS |
2729 | EXPORT_SYMBOL_GPL(nfs_callback_set_tcpport); |
2730 | EXPORT_SYMBOL_GPL(nfs_callback_tcpport); | |
2731 | EXPORT_SYMBOL_GPL(nfs_idmap_cache_timeout); | |
2732 | EXPORT_SYMBOL_GPL(nfs4_disable_idmapping); | |
2733 | EXPORT_SYMBOL_GPL(max_session_slots); | |
2734 | EXPORT_SYMBOL_GPL(send_implementation_id); | |
6f2ea7f2 | 2735 | EXPORT_SYMBOL_GPL(nfs4_client_id_uniquifier); |
89d77c8f | 2736 | |
fac1e8e4 BS |
2737 | #define NFS_CALLBACK_MAXPORTNR (65535U) |
2738 | ||
2739 | static int param_set_portnr(const char *val, const struct kernel_param *kp) | |
2740 | { | |
2741 | unsigned long num; | |
2742 | int ret; | |
2743 | ||
2744 | if (!val) | |
2745 | return -EINVAL; | |
7297cb68 | 2746 | ret = kstrtoul(val, 0, &num); |
fac1e8e4 BS |
2747 | if (ret == -EINVAL || num > NFS_CALLBACK_MAXPORTNR) |
2748 | return -EINVAL; | |
2749 | *((unsigned int *)kp->arg) = num; | |
2750 | return 0; | |
2751 | } | |
2752 | static struct kernel_param_ops param_ops_portnr = { | |
2753 | .set = param_set_portnr, | |
2754 | .get = param_get_uint, | |
2755 | }; | |
2756 | #define param_check_portnr(name, p) __param_check(name, p, unsigned int); | |
2757 | ||
2758 | module_param_named(callback_tcpport, nfs_callback_set_tcpport, portnr, 0644); | |
2759 | module_param(nfs_idmap_cache_timeout, int, 0644); | |
2760 | module_param(nfs4_disable_idmapping, bool, 0644); | |
6f2ea7f2 CL |
2761 | module_param_string(nfs4_unique_id, nfs4_client_id_uniquifier, |
2762 | NFS4_CLIENT_ID_UNIQ_LEN, 0600); | |
fac1e8e4 BS |
2763 | MODULE_PARM_DESC(nfs4_disable_idmapping, |
2764 | "Turn off NFSv4 idmapping when using 'sec=sys'"); | |
2765 | module_param(max_session_slots, ushort, 0644); | |
2766 | MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 " | |
2767 | "requests the client will negotiate"); | |
2768 | module_param(send_implementation_id, ushort, 0644); | |
2769 | MODULE_PARM_DESC(send_implementation_id, | |
2770 | "Send implementation ID with NFSv4.1 exchange_id"); | |
6f2ea7f2 | 2771 | MODULE_PARM_DESC(nfs4_unique_id, "nfs_client_id4 uniquifier string"); |
425e776d | 2772 | MODULE_ALIAS("nfs4"); |
2773 | ||
54ceac45 | 2774 | #endif /* CONFIG_NFS_V4 */ |