Commit | Line | Data |
---|---|---|
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> | |
42 | #include <linux/smp_lock.h> | |
43 | #include <linux/seq_file.h> | |
44 | #include <linux/mount.h> | |
c02d7adf TM |
45 | #include <linux/mnt_namespace.h> |
46 | #include <linux/namei.h> | |
f7b422b1 DH |
47 | #include <linux/nfs_idmap.h> |
48 | #include <linux/vfs.h> | |
49 | #include <linux/inet.h> | |
fd00a8ff CL |
50 | #include <linux/in6.h> |
51 | #include <net/ipv6.h> | |
d8e7748a | 52 | #include <linux/netdevice.h> |
f7b422b1 | 53 | #include <linux/nfs_xdr.h> |
b5d5dfbd | 54 | #include <linux/magic.h> |
bf0fd768 | 55 | #include <linux/parser.h> |
f7b422b1 DH |
56 | |
57 | #include <asm/system.h> | |
58 | #include <asm/uaccess.h> | |
59 | ||
60 | #include "nfs4_fs.h" | |
61 | #include "callback.h" | |
62 | #include "delegation.h" | |
63 | #include "iostat.h" | |
64 | #include "internal.h" | |
08734048 | 65 | #include "fscache.h" |
f7b422b1 DH |
66 | |
67 | #define NFSDBG_FACILITY NFSDBG_VFS | |
68 | ||
bf0fd768 CL |
69 | enum { |
70 | /* Mount options that take no arguments */ | |
71 | Opt_soft, Opt_hard, | |
bf0fd768 CL |
72 | Opt_posix, Opt_noposix, |
73 | Opt_cto, Opt_nocto, | |
74 | Opt_ac, Opt_noac, | |
75 | Opt_lock, Opt_nolock, | |
76 | Opt_v2, Opt_v3, | |
2cf7ff7a | 77 | Opt_udp, Opt_tcp, Opt_rdma, |
bf0fd768 CL |
78 | Opt_acl, Opt_noacl, |
79 | Opt_rdirplus, Opt_nordirplus, | |
75180df2 | 80 | Opt_sharecache, Opt_nosharecache, |
d740351b | 81 | Opt_resvport, Opt_noresvport, |
b797cac7 | 82 | Opt_fscache, Opt_nofscache, |
bf0fd768 CL |
83 | |
84 | /* Mount options that take integer arguments */ | |
85 | Opt_port, | |
86 | Opt_rsize, Opt_wsize, Opt_bsize, | |
87 | Opt_timeo, Opt_retrans, | |
88 | Opt_acregmin, Opt_acregmax, | |
89 | Opt_acdirmin, Opt_acdirmax, | |
90 | Opt_actimeo, | |
91 | Opt_namelen, | |
92 | Opt_mountport, | |
e887cbcf | 93 | Opt_mountvers, |
ad879cef | 94 | Opt_nfsvers, |
3fd5be9e | 95 | Opt_minorversion, |
bf0fd768 CL |
96 | |
97 | /* Mount options that take string arguments */ | |
33832034 | 98 | Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost, |
0ac83779 | 99 | Opt_addr, Opt_mountaddr, Opt_clientaddr, |
7973c1f1 | 100 | Opt_lookupcache, |
b797cac7 | 101 | Opt_fscache_uniq, |
bf0fd768 | 102 | |
f45663ce CL |
103 | /* Special mount options */ |
104 | Opt_userspace, Opt_deprecated, Opt_sloppy, | |
bf0fd768 CL |
105 | |
106 | Opt_err | |
107 | }; | |
108 | ||
a447c093 | 109 | static const match_table_t nfs_mount_option_tokens = { |
bf0fd768 CL |
110 | { Opt_userspace, "bg" }, |
111 | { Opt_userspace, "fg" }, | |
ecbb3845 CL |
112 | { Opt_userspace, "retry=%s" }, |
113 | ||
f45663ce CL |
114 | { Opt_sloppy, "sloppy" }, |
115 | ||
bf0fd768 CL |
116 | { Opt_soft, "soft" }, |
117 | { Opt_hard, "hard" }, | |
d33e4dfe CL |
118 | { Opt_deprecated, "intr" }, |
119 | { Opt_deprecated, "nointr" }, | |
bf0fd768 CL |
120 | { Opt_posix, "posix" }, |
121 | { Opt_noposix, "noposix" }, | |
122 | { Opt_cto, "cto" }, | |
123 | { Opt_nocto, "nocto" }, | |
124 | { Opt_ac, "ac" }, | |
125 | { Opt_noac, "noac" }, | |
126 | { Opt_lock, "lock" }, | |
127 | { Opt_nolock, "nolock" }, | |
128 | { Opt_v2, "v2" }, | |
129 | { Opt_v3, "v3" }, | |
130 | { Opt_udp, "udp" }, | |
131 | { Opt_tcp, "tcp" }, | |
2cf7ff7a | 132 | { Opt_rdma, "rdma" }, |
bf0fd768 CL |
133 | { Opt_acl, "acl" }, |
134 | { Opt_noacl, "noacl" }, | |
135 | { Opt_rdirplus, "rdirplus" }, | |
136 | { Opt_nordirplus, "nordirplus" }, | |
75180df2 TM |
137 | { Opt_sharecache, "sharecache" }, |
138 | { Opt_nosharecache, "nosharecache" }, | |
d740351b CL |
139 | { Opt_resvport, "resvport" }, |
140 | { Opt_noresvport, "noresvport" }, | |
b797cac7 DH |
141 | { Opt_fscache, "fsc" }, |
142 | { Opt_fscache_uniq, "fsc=%s" }, | |
143 | { Opt_nofscache, "nofsc" }, | |
bf0fd768 | 144 | |
a5a16bae CL |
145 | { Opt_port, "port=%s" }, |
146 | { Opt_rsize, "rsize=%s" }, | |
147 | { Opt_wsize, "wsize=%s" }, | |
148 | { Opt_bsize, "bsize=%s" }, | |
149 | { Opt_timeo, "timeo=%s" }, | |
150 | { Opt_retrans, "retrans=%s" }, | |
151 | { Opt_acregmin, "acregmin=%s" }, | |
152 | { Opt_acregmax, "acregmax=%s" }, | |
153 | { Opt_acdirmin, "acdirmin=%s" }, | |
154 | { Opt_acdirmax, "acdirmax=%s" }, | |
155 | { Opt_actimeo, "actimeo=%s" }, | |
156 | { Opt_namelen, "namlen=%s" }, | |
157 | { Opt_mountport, "mountport=%s" }, | |
158 | { Opt_mountvers, "mountvers=%s" }, | |
159 | { Opt_nfsvers, "nfsvers=%s" }, | |
160 | { Opt_nfsvers, "vers=%s" }, | |
f3f4f4ed | 161 | { Opt_minorversion, "minorversion=%s" }, |
bf0fd768 CL |
162 | |
163 | { Opt_sec, "sec=%s" }, | |
164 | { Opt_proto, "proto=%s" }, | |
165 | { Opt_mountproto, "mountproto=%s" }, | |
166 | { Opt_addr, "addr=%s" }, | |
167 | { Opt_clientaddr, "clientaddr=%s" }, | |
33832034 | 168 | { Opt_mounthost, "mounthost=%s" }, |
0ac83779 | 169 | { Opt_mountaddr, "mountaddr=%s" }, |
bf0fd768 | 170 | |
7973c1f1 TM |
171 | { Opt_lookupcache, "lookupcache=%s" }, |
172 | ||
bf0fd768 CL |
173 | { Opt_err, NULL } |
174 | }; | |
175 | ||
176 | enum { | |
2cf7ff7a | 177 | Opt_xprt_udp, Opt_xprt_tcp, Opt_xprt_rdma, |
bf0fd768 CL |
178 | |
179 | Opt_xprt_err | |
180 | }; | |
181 | ||
a447c093 | 182 | static const match_table_t nfs_xprt_protocol_tokens = { |
bf0fd768 CL |
183 | { Opt_xprt_udp, "udp" }, |
184 | { Opt_xprt_tcp, "tcp" }, | |
2cf7ff7a | 185 | { Opt_xprt_rdma, "rdma" }, |
bf0fd768 CL |
186 | |
187 | { Opt_xprt_err, NULL } | |
188 | }; | |
189 | ||
190 | enum { | |
191 | Opt_sec_none, Opt_sec_sys, | |
192 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
193 | Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, | |
194 | Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, | |
195 | ||
196 | Opt_sec_err | |
197 | }; | |
198 | ||
a447c093 | 199 | static const match_table_t nfs_secflavor_tokens = { |
bf0fd768 CL |
200 | { Opt_sec_none, "none" }, |
201 | { Opt_sec_none, "null" }, | |
202 | { Opt_sec_sys, "sys" }, | |
203 | ||
204 | { Opt_sec_krb5, "krb5" }, | |
205 | { Opt_sec_krb5i, "krb5i" }, | |
206 | { Opt_sec_krb5p, "krb5p" }, | |
207 | ||
208 | { Opt_sec_lkey, "lkey" }, | |
209 | { Opt_sec_lkeyi, "lkeyi" }, | |
210 | { Opt_sec_lkeyp, "lkeyp" }, | |
211 | ||
8d042218 OK |
212 | { Opt_sec_spkm, "spkm3" }, |
213 | { Opt_sec_spkmi, "spkm3i" }, | |
214 | { Opt_sec_spkmp, "spkm3p" }, | |
215 | ||
bf0fd768 CL |
216 | { Opt_sec_err, NULL } |
217 | }; | |
218 | ||
7973c1f1 TM |
219 | enum { |
220 | Opt_lookupcache_all, Opt_lookupcache_positive, | |
221 | Opt_lookupcache_none, | |
222 | ||
223 | Opt_lookupcache_err | |
224 | }; | |
225 | ||
226 | static match_table_t nfs_lookupcache_tokens = { | |
227 | { Opt_lookupcache_all, "all" }, | |
228 | { Opt_lookupcache_positive, "pos" }, | |
229 | { Opt_lookupcache_positive, "positive" }, | |
230 | { Opt_lookupcache_none, "none" }, | |
231 | ||
232 | { Opt_lookupcache_err, NULL } | |
233 | }; | |
234 | ||
bf0fd768 | 235 | |
42faad99 | 236 | static void nfs_umount_begin(struct super_block *); |
816724e6 | 237 | static int nfs_statfs(struct dentry *, struct kstatfs *); |
f7b422b1 DH |
238 | static int nfs_show_options(struct seq_file *, struct vfsmount *); |
239 | static int nfs_show_stats(struct seq_file *, struct vfsmount *); | |
816724e6 | 240 | static int nfs_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *); |
54ceac45 | 241 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, |
816724e6 | 242 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); |
f7b422b1 | 243 | static void nfs_kill_super(struct super_block *); |
48b605f8 | 244 | static int nfs_remount(struct super_block *sb, int *flags, char *raw_data); |
f7b422b1 DH |
245 | |
246 | static struct file_system_type nfs_fs_type = { | |
247 | .owner = THIS_MODULE, | |
248 | .name = "nfs", | |
249 | .get_sb = nfs_get_sb, | |
250 | .kill_sb = nfs_kill_super, | |
349457cc | 251 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
252 | }; |
253 | ||
54ceac45 | 254 | struct file_system_type nfs_xdev_fs_type = { |
f7b422b1 DH |
255 | .owner = THIS_MODULE, |
256 | .name = "nfs", | |
54ceac45 | 257 | .get_sb = nfs_xdev_get_sb, |
f7b422b1 | 258 | .kill_sb = nfs_kill_super, |
349457cc | 259 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
260 | }; |
261 | ||
ee9b6d61 | 262 | static const struct super_operations nfs_sops = { |
f7b422b1 DH |
263 | .alloc_inode = nfs_alloc_inode, |
264 | .destroy_inode = nfs_destroy_inode, | |
265 | .write_inode = nfs_write_inode, | |
266 | .statfs = nfs_statfs, | |
267 | .clear_inode = nfs_clear_inode, | |
268 | .umount_begin = nfs_umount_begin, | |
269 | .show_options = nfs_show_options, | |
270 | .show_stats = nfs_show_stats, | |
48b605f8 | 271 | .remount_fs = nfs_remount, |
f7b422b1 DH |
272 | }; |
273 | ||
274 | #ifdef CONFIG_NFS_V4 | |
816724e6 TM |
275 | static int nfs4_get_sb(struct file_system_type *fs_type, |
276 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
c02d7adf TM |
277 | static int nfs4_remote_get_sb(struct file_system_type *fs_type, |
278 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
54ceac45 DH |
279 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, |
280 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
281 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, | |
282 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
c02d7adf TM |
283 | static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type, |
284 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
f7b422b1 DH |
285 | static void nfs4_kill_super(struct super_block *sb); |
286 | ||
287 | static struct file_system_type nfs4_fs_type = { | |
288 | .owner = THIS_MODULE, | |
289 | .name = "nfs4", | |
290 | .get_sb = nfs4_get_sb, | |
291 | .kill_sb = nfs4_kill_super, | |
349457cc | 292 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
293 | }; |
294 | ||
c02d7adf TM |
295 | static struct file_system_type nfs4_remote_fs_type = { |
296 | .owner = THIS_MODULE, | |
297 | .name = "nfs4", | |
298 | .get_sb = nfs4_remote_get_sb, | |
299 | .kill_sb = nfs4_kill_super, | |
300 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, | |
301 | }; | |
302 | ||
54ceac45 | 303 | struct file_system_type nfs4_xdev_fs_type = { |
f7b422b1 DH |
304 | .owner = THIS_MODULE, |
305 | .name = "nfs4", | |
54ceac45 | 306 | .get_sb = nfs4_xdev_get_sb, |
f7b422b1 | 307 | .kill_sb = nfs4_kill_super, |
349457cc | 308 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
309 | }; |
310 | ||
c02d7adf TM |
311 | static struct file_system_type nfs4_remote_referral_fs_type = { |
312 | .owner = THIS_MODULE, | |
313 | .name = "nfs4", | |
314 | .get_sb = nfs4_remote_referral_get_sb, | |
315 | .kill_sb = nfs4_kill_super, | |
316 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, | |
317 | }; | |
318 | ||
54ceac45 | 319 | struct file_system_type nfs4_referral_fs_type = { |
f7b422b1 DH |
320 | .owner = THIS_MODULE, |
321 | .name = "nfs4", | |
54ceac45 | 322 | .get_sb = nfs4_referral_get_sb, |
f7b422b1 | 323 | .kill_sb = nfs4_kill_super, |
349457cc | 324 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
325 | }; |
326 | ||
ee9b6d61 | 327 | static const struct super_operations nfs4_sops = { |
f7b422b1 DH |
328 | .alloc_inode = nfs_alloc_inode, |
329 | .destroy_inode = nfs_destroy_inode, | |
330 | .write_inode = nfs_write_inode, | |
331 | .statfs = nfs_statfs, | |
332 | .clear_inode = nfs4_clear_inode, | |
333 | .umount_begin = nfs_umount_begin, | |
334 | .show_options = nfs_show_options, | |
335 | .show_stats = nfs_show_stats, | |
48b605f8 | 336 | .remount_fs = nfs_remount, |
f7b422b1 DH |
337 | }; |
338 | #endif | |
339 | ||
8e1f936b RR |
340 | static struct shrinker acl_shrinker = { |
341 | .shrink = nfs_access_cache_shrinker, | |
342 | .seeks = DEFAULT_SEEKS, | |
343 | }; | |
979df72e | 344 | |
f7b422b1 DH |
345 | /* |
346 | * Register the NFS filesystems | |
347 | */ | |
348 | int __init register_nfs_fs(void) | |
349 | { | |
350 | int ret; | |
351 | ||
352 | ret = register_filesystem(&nfs_fs_type); | |
353 | if (ret < 0) | |
354 | goto error_0; | |
355 | ||
f7b422b1 DH |
356 | ret = nfs_register_sysctl(); |
357 | if (ret < 0) | |
358 | goto error_1; | |
89a09141 | 359 | #ifdef CONFIG_NFS_V4 |
f7b422b1 DH |
360 | ret = register_filesystem(&nfs4_fs_type); |
361 | if (ret < 0) | |
362 | goto error_2; | |
363 | #endif | |
8e1f936b | 364 | register_shrinker(&acl_shrinker); |
f7b422b1 DH |
365 | return 0; |
366 | ||
367 | #ifdef CONFIG_NFS_V4 | |
368 | error_2: | |
369 | nfs_unregister_sysctl(); | |
89a09141 | 370 | #endif |
f7b422b1 DH |
371 | error_1: |
372 | unregister_filesystem(&nfs_fs_type); | |
f7b422b1 DH |
373 | error_0: |
374 | return ret; | |
375 | } | |
376 | ||
377 | /* | |
378 | * Unregister the NFS filesystems | |
379 | */ | |
380 | void __exit unregister_nfs_fs(void) | |
381 | { | |
8e1f936b | 382 | unregister_shrinker(&acl_shrinker); |
f7b422b1 DH |
383 | #ifdef CONFIG_NFS_V4 |
384 | unregister_filesystem(&nfs4_fs_type); | |
f7b422b1 | 385 | #endif |
49af7ee1 | 386 | nfs_unregister_sysctl(); |
f7b422b1 DH |
387 | unregister_filesystem(&nfs_fs_type); |
388 | } | |
389 | ||
1daef0a8 | 390 | void nfs_sb_active(struct super_block *sb) |
ef818a28 | 391 | { |
1daef0a8 | 392 | struct nfs_server *server = NFS_SB(sb); |
ef818a28 | 393 | |
1daef0a8 TM |
394 | if (atomic_inc_return(&server->active) == 1) |
395 | atomic_inc(&sb->s_active); | |
ef818a28 SD |
396 | } |
397 | ||
1daef0a8 | 398 | void nfs_sb_deactive(struct super_block *sb) |
ef818a28 SD |
399 | { |
400 | struct nfs_server *server = NFS_SB(sb); | |
1daef0a8 TM |
401 | |
402 | if (atomic_dec_and_test(&server->active)) | |
403 | deactivate_super(sb); | |
ef818a28 SD |
404 | } |
405 | ||
f7b422b1 DH |
406 | /* |
407 | * Deliver file system statistics to userspace | |
408 | */ | |
816724e6 | 409 | static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
f7b422b1 | 410 | { |
0c7d90cf | 411 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
f7b422b1 DH |
412 | unsigned char blockbits; |
413 | unsigned long blockres; | |
0c7d90cf | 414 | struct nfs_fh *fh = NFS_FH(dentry->d_inode); |
f7b422b1 DH |
415 | struct nfs_fattr fattr; |
416 | struct nfs_fsstat res = { | |
417 | .fattr = &fattr, | |
418 | }; | |
419 | int error; | |
420 | ||
8fa5c000 | 421 | error = server->nfs_client->rpc_ops->statfs(server, fh, &res); |
f7b422b1 DH |
422 | if (error < 0) |
423 | goto out_err; | |
1a0ba9ae | 424 | buf->f_type = NFS_SUPER_MAGIC; |
f7b422b1 DH |
425 | |
426 | /* | |
427 | * Current versions of glibc do not correctly handle the | |
428 | * case where f_frsize != f_bsize. Eventually we want to | |
429 | * report the value of wtmult in this field. | |
430 | */ | |
0c7d90cf | 431 | buf->f_frsize = dentry->d_sb->s_blocksize; |
f7b422b1 DH |
432 | |
433 | /* | |
434 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
435 | * are reported in units of f_frsize. Linux hasn't had | |
436 | * an f_frsize field in its statfs struct until recently, | |
437 | * thus historically Linux's sys_statfs reports these | |
438 | * fields in units of f_bsize. | |
439 | */ | |
0c7d90cf DH |
440 | buf->f_bsize = dentry->d_sb->s_blocksize; |
441 | blockbits = dentry->d_sb->s_blocksize_bits; | |
f7b422b1 DH |
442 | blockres = (1 << blockbits) - 1; |
443 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
444 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
445 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
446 | ||
447 | buf->f_files = res.tfiles; | |
448 | buf->f_ffree = res.afiles; | |
449 | ||
450 | buf->f_namelen = server->namelen; | |
1a0ba9ae | 451 | |
f7b422b1 DH |
452 | return 0; |
453 | ||
454 | out_err: | |
3110ff80 | 455 | dprintk("%s: statfs error = %d\n", __func__, -error); |
1a0ba9ae | 456 | return error; |
f7b422b1 DH |
457 | } |
458 | ||
7d4e2747 DH |
459 | /* |
460 | * Map the security flavour number to a name | |
461 | */ | |
81039f1f TM |
462 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
463 | { | |
7d4e2747 | 464 | static const struct { |
81039f1f TM |
465 | rpc_authflavor_t flavour; |
466 | const char *str; | |
467 | } sec_flavours[] = { | |
468 | { RPC_AUTH_NULL, "null" }, | |
469 | { RPC_AUTH_UNIX, "sys" }, | |
470 | { RPC_AUTH_GSS_KRB5, "krb5" }, | |
471 | { RPC_AUTH_GSS_KRB5I, "krb5i" }, | |
472 | { RPC_AUTH_GSS_KRB5P, "krb5p" }, | |
473 | { RPC_AUTH_GSS_LKEY, "lkey" }, | |
474 | { RPC_AUTH_GSS_LKEYI, "lkeyi" }, | |
475 | { RPC_AUTH_GSS_LKEYP, "lkeyp" }, | |
476 | { RPC_AUTH_GSS_SPKM, "spkm" }, | |
477 | { RPC_AUTH_GSS_SPKMI, "spkmi" }, | |
478 | { RPC_AUTH_GSS_SPKMP, "spkmp" }, | |
4d81cd16 | 479 | { UINT_MAX, "unknown" } |
81039f1f TM |
480 | }; |
481 | int i; | |
482 | ||
4d81cd16 | 483 | for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) { |
81039f1f TM |
484 | if (sec_flavours[i].flavour == flavour) |
485 | break; | |
486 | } | |
487 | return sec_flavours[i].str; | |
488 | } | |
489 | ||
82d101d5 CL |
490 | static void nfs_show_mountd_options(struct seq_file *m, struct nfs_server *nfss, |
491 | int showdefaults) | |
492 | { | |
493 | struct sockaddr *sap = (struct sockaddr *)&nfss->mountd_address; | |
494 | ||
495 | switch (sap->sa_family) { | |
496 | case AF_INET: { | |
497 | struct sockaddr_in *sin = (struct sockaddr_in *)sap; | |
be859405 | 498 | seq_printf(m, ",mountaddr=%pI4", &sin->sin_addr.s_addr); |
82d101d5 CL |
499 | break; |
500 | } | |
501 | case AF_INET6: { | |
502 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
5b095d98 | 503 | seq_printf(m, ",mountaddr=%pI6", &sin6->sin6_addr); |
82d101d5 CL |
504 | break; |
505 | } | |
506 | default: | |
507 | if (showdefaults) | |
508 | seq_printf(m, ",mountaddr=unspecified"); | |
509 | } | |
510 | ||
511 | if (nfss->mountd_version || showdefaults) | |
512 | seq_printf(m, ",mountvers=%u", nfss->mountd_version); | |
513 | if (nfss->mountd_port || showdefaults) | |
514 | seq_printf(m, ",mountport=%u", nfss->mountd_port); | |
515 | ||
516 | switch (nfss->mountd_protocol) { | |
517 | case IPPROTO_UDP: | |
518 | seq_printf(m, ",mountproto=udp"); | |
519 | break; | |
520 | case IPPROTO_TCP: | |
521 | seq_printf(m, ",mountproto=tcp"); | |
522 | break; | |
523 | default: | |
524 | if (showdefaults) | |
525 | seq_printf(m, ",mountproto=auto"); | |
526 | } | |
527 | } | |
528 | ||
f7b422b1 DH |
529 | /* |
530 | * Describe the mount options in force on this server representation | |
531 | */ | |
82d101d5 CL |
532 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, |
533 | int showdefaults) | |
f7b422b1 | 534 | { |
509de811 | 535 | static const struct proc_nfs_info { |
f7b422b1 | 536 | int flag; |
509de811 DH |
537 | const char *str; |
538 | const char *nostr; | |
f7b422b1 DH |
539 | } nfs_info[] = { |
540 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, | |
82d101d5 | 541 | { NFS_MOUNT_POSIX, ",posix", "" }, |
f7b422b1 DH |
542 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
543 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
544 | { NFS_MOUNT_NONLM, ",nolock", "" }, | |
545 | { NFS_MOUNT_NOACL, ",noacl", "" }, | |
74dd34e6 | 546 | { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" }, |
d740351b CL |
547 | { NFS_MOUNT_UNSHARED, ",nosharecache", "" }, |
548 | { NFS_MOUNT_NORESVPORT, ",noresvport", "" }, | |
f7b422b1 DH |
549 | { 0, NULL, NULL } |
550 | }; | |
509de811 | 551 | const struct proc_nfs_info *nfs_infop; |
8fa5c000 | 552 | struct nfs_client *clp = nfss->nfs_client; |
82d101d5 | 553 | u32 version = clp->rpc_ops->version; |
f7b422b1 | 554 | |
82d101d5 | 555 | seq_printf(m, ",vers=%u", version); |
2d767432 CL |
556 | seq_printf(m, ",rsize=%u", nfss->rsize); |
557 | seq_printf(m, ",wsize=%u", nfss->wsize); | |
82d101d5 CL |
558 | if (nfss->bsize != 0) |
559 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
560 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
0e0cab74 | 561 | if (nfss->acregmin != NFS_DEF_ACREGMIN*HZ || showdefaults) |
2d767432 | 562 | seq_printf(m, ",acregmin=%u", nfss->acregmin/HZ); |
0e0cab74 | 563 | if (nfss->acregmax != NFS_DEF_ACREGMAX*HZ || showdefaults) |
2d767432 | 564 | seq_printf(m, ",acregmax=%u", nfss->acregmax/HZ); |
0e0cab74 | 565 | if (nfss->acdirmin != NFS_DEF_ACDIRMIN*HZ || showdefaults) |
2d767432 | 566 | seq_printf(m, ",acdirmin=%u", nfss->acdirmin/HZ); |
0e0cab74 | 567 | if (nfss->acdirmax != NFS_DEF_ACDIRMAX*HZ || showdefaults) |
2d767432 | 568 | seq_printf(m, ",acdirmax=%u", nfss->acdirmax/HZ); |
f7b422b1 DH |
569 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { |
570 | if (nfss->flags & nfs_infop->flag) | |
571 | seq_puts(m, nfs_infop->str); | |
572 | else | |
573 | seq_puts(m, nfs_infop->nostr); | |
574 | } | |
56928edd TT |
575 | seq_printf(m, ",proto=%s", |
576 | rpc_peeraddr2str(nfss->client, RPC_DISPLAY_PROTO)); | |
82d101d5 CL |
577 | if (version == 4) { |
578 | if (nfss->port != NFS_PORT) | |
579 | seq_printf(m, ",port=%u", nfss->port); | |
580 | } else | |
581 | if (nfss->port) | |
582 | seq_printf(m, ",port=%u", nfss->port); | |
583 | ||
33170233 TM |
584 | seq_printf(m, ",timeo=%lu", 10U * nfss->client->cl_timeout->to_initval / HZ); |
585 | seq_printf(m, ",retrans=%u", nfss->client->cl_timeout->to_retries); | |
81039f1f | 586 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
82d101d5 CL |
587 | |
588 | if (version != 4) | |
589 | nfs_show_mountd_options(m, nfss, showdefaults); | |
590 | ||
591 | #ifdef CONFIG_NFS_V4 | |
592 | if (clp->rpc_ops->version == 4) | |
593 | seq_printf(m, ",clientaddr=%s", clp->cl_ipaddr); | |
594 | #endif | |
b797cac7 DH |
595 | if (nfss->options & NFS_OPTION_FSCACHE) |
596 | seq_printf(m, ",fsc"); | |
f7b422b1 DH |
597 | } |
598 | ||
599 | /* | |
600 | * Describe the mount options on this VFS mountpoint | |
601 | */ | |
602 | static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) | |
603 | { | |
604 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
605 | ||
606 | nfs_show_mount_options(m, nfss, 0); | |
607 | ||
5d8515ca CL |
608 | seq_printf(m, ",addr=%s", |
609 | rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient, | |
610 | RPC_DISPLAY_ADDR)); | |
f7b422b1 DH |
611 | |
612 | return 0; | |
613 | } | |
614 | ||
615 | /* | |
616 | * Present statistical information for this VFS mountpoint | |
617 | */ | |
618 | static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) | |
619 | { | |
620 | int i, cpu; | |
621 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
622 | struct rpc_auth *auth = nfss->client->cl_auth; | |
623 | struct nfs_iostats totals = { }; | |
624 | ||
625 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
626 | ||
627 | /* | |
628 | * Display all mount option settings | |
629 | */ | |
630 | seq_printf(m, "\n\topts:\t"); | |
631 | seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw"); | |
632 | seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); | |
633 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : ""); | |
634 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); | |
635 | nfs_show_mount_options(m, nfss, 1); | |
636 | ||
637 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); | |
638 | ||
639 | seq_printf(m, "\n\tcaps:\t"); | |
640 | seq_printf(m, "caps=0x%x", nfss->caps); | |
2d767432 CL |
641 | seq_printf(m, ",wtmult=%u", nfss->wtmult); |
642 | seq_printf(m, ",dtsize=%u", nfss->dtsize); | |
643 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
644 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
f7b422b1 DH |
645 | |
646 | #ifdef CONFIG_NFS_V4 | |
40c55319 | 647 | if (nfss->nfs_client->rpc_ops->version == 4) { |
f7b422b1 DH |
648 | seq_printf(m, "\n\tnfsv4:\t"); |
649 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); | |
650 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
651 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); | |
652 | } | |
653 | #endif | |
654 | ||
655 | /* | |
656 | * Display security flavor in effect for this mount | |
657 | */ | |
2d767432 | 658 | seq_printf(m, "\n\tsec:\tflavor=%u", auth->au_ops->au_flavor); |
f7b422b1 | 659 | if (auth->au_flavor) |
2d767432 | 660 | seq_printf(m, ",pseudoflavor=%u", auth->au_flavor); |
f7b422b1 DH |
661 | |
662 | /* | |
663 | * Display superblock I/O counters | |
664 | */ | |
665 | for_each_possible_cpu(cpu) { | |
666 | struct nfs_iostats *stats; | |
667 | ||
668 | preempt_disable(); | |
669 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
670 | ||
671 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
672 | totals.events[i] += stats->events[i]; | |
673 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
674 | totals.bytes[i] += stats->bytes[i]; | |
6a51091d DH |
675 | #ifdef CONFIG_NFS_FSCACHE |
676 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
677 | totals.fscache[i] += stats->fscache[i]; | |
678 | #endif | |
f7b422b1 DH |
679 | |
680 | preempt_enable(); | |
681 | } | |
682 | ||
683 | seq_printf(m, "\n\tevents:\t"); | |
684 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
685 | seq_printf(m, "%lu ", totals.events[i]); | |
686 | seq_printf(m, "\n\tbytes:\t"); | |
687 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
688 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
6a51091d DH |
689 | #ifdef CONFIG_NFS_FSCACHE |
690 | if (nfss->options & NFS_OPTION_FSCACHE) { | |
691 | seq_printf(m, "\n\tfsc:\t"); | |
692 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
693 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
694 | } | |
695 | #endif | |
f7b422b1 DH |
696 | seq_printf(m, "\n"); |
697 | ||
698 | rpc_print_iostats(m, nfss->client); | |
699 | ||
700 | return 0; | |
701 | } | |
702 | ||
703 | /* | |
704 | * Begin unmount by attempting to remove all automounted mountpoints we added | |
54ceac45 | 705 | * in response to xdev traversals and referrals |
f7b422b1 | 706 | */ |
42faad99 | 707 | static void nfs_umount_begin(struct super_block *sb) |
f7b422b1 | 708 | { |
67e55205 | 709 | struct nfs_server *server; |
fc6ae3cf TM |
710 | struct rpc_clnt *rpc; |
711 | ||
67e55205 AIB |
712 | lock_kernel(); |
713 | ||
714 | server = NFS_SB(sb); | |
fc6ae3cf TM |
715 | /* -EIO all pending I/O */ |
716 | rpc = server->client_acl; | |
717 | if (!IS_ERR(rpc)) | |
718 | rpc_killall_tasks(rpc); | |
719 | rpc = server->client; | |
720 | if (!IS_ERR(rpc)) | |
721 | rpc_killall_tasks(rpc); | |
67e55205 AIB |
722 | |
723 | unlock_kernel(); | |
f7b422b1 DH |
724 | } |
725 | ||
fc50d58f | 726 | /* |
cdcd7f9a CL |
727 | * Sanity-check a server address provided by the mount command. |
728 | * | |
729 | * Address family must be initialized, and address must not be | |
730 | * the ANY address for that family. | |
fc50d58f CL |
731 | */ |
732 | static int nfs_verify_server_address(struct sockaddr *addr) | |
733 | { | |
734 | switch (addr->sa_family) { | |
735 | case AF_INET: { | |
cdcd7f9a | 736 | struct sockaddr_in *sa = (struct sockaddr_in *)addr; |
e6f1cebf | 737 | return sa->sin_addr.s_addr != htonl(INADDR_ANY); |
cdcd7f9a CL |
738 | } |
739 | case AF_INET6: { | |
740 | struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr; | |
741 | return !ipv6_addr_any(sa); | |
fc50d58f CL |
742 | } |
743 | } | |
744 | ||
745 | return 0; | |
746 | } | |
747 | ||
ce3b7e19 CL |
748 | static void nfs_parse_ipv4_address(char *string, size_t str_len, |
749 | struct sockaddr *sap, size_t *addr_len) | |
9412b927 | 750 | { |
ce3b7e19 CL |
751 | struct sockaddr_in *sin = (struct sockaddr_in *)sap; |
752 | u8 *addr = (u8 *)&sin->sin_addr.s_addr; | |
9412b927 | 753 | |
ce3b7e19 CL |
754 | if (str_len <= INET_ADDRSTRLEN) { |
755 | dfprintk(MOUNT, "NFS: parsing IPv4 address %*s\n", | |
756 | (int)str_len, string); | |
757 | ||
758 | sin->sin_family = AF_INET; | |
759 | *addr_len = sizeof(*sin); | |
760 | if (in4_pton(string, str_len, addr, '\0', NULL)) | |
3c7c7e48 | 761 | return; |
ce3b7e19 CL |
762 | } |
763 | ||
764 | sap->sa_family = AF_UNSPEC; | |
765 | *addr_len = 0; | |
766 | } | |
767 | ||
768 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
5e2e7721 CL |
769 | static int nfs_parse_ipv6_scope_id(const char *string, const size_t str_len, |
770 | const char *delim, | |
771 | struct sockaddr_in6 *sin6) | |
d8e7748a CL |
772 | { |
773 | char *p; | |
774 | size_t len; | |
775 | ||
5e2e7721 CL |
776 | if ((string + str_len) == delim) |
777 | return 1; | |
778 | ||
d8e7748a | 779 | if (*delim != IPV6_SCOPE_DELIMITER) |
5e2e7721 CL |
780 | return 0; |
781 | ||
782 | if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)) | |
783 | return 0; | |
d8e7748a CL |
784 | |
785 | len = (string + str_len) - delim - 1; | |
786 | p = kstrndup(delim + 1, len, GFP_KERNEL); | |
787 | if (p) { | |
788 | unsigned long scope_id = 0; | |
789 | struct net_device *dev; | |
790 | ||
791 | dev = dev_get_by_name(&init_net, p); | |
792 | if (dev != NULL) { | |
793 | scope_id = dev->ifindex; | |
794 | dev_put(dev); | |
795 | } else { | |
5e2e7721 CL |
796 | if (strict_strtoul(p, 10, &scope_id) == 0) { |
797 | kfree(p); | |
798 | return 0; | |
799 | } | |
d8e7748a CL |
800 | } |
801 | ||
802 | kfree(p); | |
5e2e7721 | 803 | |
d8e7748a CL |
804 | sin6->sin6_scope_id = scope_id; |
805 | dfprintk(MOUNT, "NFS: IPv6 scope ID = %lu\n", scope_id); | |
5e2e7721 | 806 | return 1; |
d8e7748a | 807 | } |
5e2e7721 CL |
808 | |
809 | return 0; | |
d8e7748a CL |
810 | } |
811 | ||
ce3b7e19 CL |
812 | static void nfs_parse_ipv6_address(char *string, size_t str_len, |
813 | struct sockaddr *sap, size_t *addr_len) | |
814 | { | |
815 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
816 | u8 *addr = (u8 *)&sin6->sin6_addr.in6_u; | |
d8e7748a | 817 | const char *delim; |
ce3b7e19 CL |
818 | |
819 | if (str_len <= INET6_ADDRSTRLEN) { | |
820 | dfprintk(MOUNT, "NFS: parsing IPv6 address %*s\n", | |
821 | (int)str_len, string); | |
3c7c7e48 | 822 | |
ce3b7e19 CL |
823 | sin6->sin6_family = AF_INET6; |
824 | *addr_len = sizeof(*sin6); | |
5e2e7721 CL |
825 | if (in6_pton(string, str_len, addr, |
826 | IPV6_SCOPE_DELIMITER, &delim) != 0) { | |
827 | if (nfs_parse_ipv6_scope_id(string, str_len, | |
828 | delim, sin6) != 0) | |
829 | return; | |
d8e7748a | 830 | } |
3c7c7e48 | 831 | } |
9412b927 CL |
832 | |
833 | sap->sa_family = AF_UNSPEC; | |
ce3b7e19 CL |
834 | *addr_len = 0; |
835 | } | |
836 | #else | |
837 | static void nfs_parse_ipv6_address(char *string, size_t str_len, | |
838 | struct sockaddr *sap, size_t *addr_len) | |
839 | { | |
840 | sap->sa_family = AF_UNSPEC; | |
841 | *addr_len = 0; | |
842 | } | |
843 | #endif | |
844 | ||
845 | /* | |
846 | * Construct a sockaddr based on the contents of a string that contains | |
847 | * an IP address in presentation format. | |
848 | * | |
849 | * If there is a problem constructing the new sockaddr, set the address | |
850 | * family to AF_UNSPEC. | |
851 | */ | |
ea31a443 | 852 | void nfs_parse_ip_address(char *string, size_t str_len, |
ce3b7e19 CL |
853 | struct sockaddr *sap, size_t *addr_len) |
854 | { | |
855 | unsigned int i, colons; | |
856 | ||
857 | colons = 0; | |
858 | for (i = 0; i < str_len; i++) | |
859 | if (string[i] == ':') | |
860 | colons++; | |
861 | ||
862 | if (colons >= 2) | |
863 | nfs_parse_ipv6_address(string, str_len, sap, addr_len); | |
864 | else | |
865 | nfs_parse_ipv4_address(string, str_len, sap, addr_len); | |
9412b927 CL |
866 | } |
867 | ||
259875ef TM |
868 | /* |
869 | * Sanity check the NFS transport protocol. | |
870 | * | |
871 | */ | |
872 | static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
873 | { | |
874 | switch (mnt->nfs_server.protocol) { | |
875 | case XPRT_TRANSPORT_UDP: | |
876 | case XPRT_TRANSPORT_TCP: | |
877 | case XPRT_TRANSPORT_RDMA: | |
878 | break; | |
879 | default: | |
880 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; | |
881 | } | |
882 | } | |
883 | ||
884 | /* | |
885 | * For text based NFSv2/v3 mounts, the mount protocol transport default | |
886 | * settings should depend upon the specified NFS transport. | |
887 | */ | |
888 | static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
889 | { | |
890 | nfs_validate_transport_protocol(mnt); | |
891 | ||
892 | if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP || | |
893 | mnt->mount_server.protocol == XPRT_TRANSPORT_TCP) | |
894 | return; | |
895 | switch (mnt->nfs_server.protocol) { | |
896 | case XPRT_TRANSPORT_UDP: | |
897 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; | |
898 | break; | |
899 | case XPRT_TRANSPORT_TCP: | |
900 | case XPRT_TRANSPORT_RDMA: | |
901 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; | |
902 | } | |
903 | } | |
904 | ||
01060c89 CL |
905 | /* |
906 | * Parse the value of the 'sec=' option. | |
01060c89 CL |
907 | */ |
908 | static int nfs_parse_security_flavors(char *value, | |
909 | struct nfs_parsed_mount_data *mnt) | |
910 | { | |
911 | substring_t args[MAX_OPT_ARGS]; | |
912 | ||
913 | dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); | |
914 | ||
915 | switch (match_token(value, nfs_secflavor_tokens, args)) { | |
916 | case Opt_sec_none: | |
01060c89 CL |
917 | mnt->auth_flavors[0] = RPC_AUTH_NULL; |
918 | break; | |
919 | case Opt_sec_sys: | |
01060c89 CL |
920 | mnt->auth_flavors[0] = RPC_AUTH_UNIX; |
921 | break; | |
922 | case Opt_sec_krb5: | |
01060c89 CL |
923 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5; |
924 | break; | |
925 | case Opt_sec_krb5i: | |
01060c89 CL |
926 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I; |
927 | break; | |
928 | case Opt_sec_krb5p: | |
01060c89 CL |
929 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P; |
930 | break; | |
931 | case Opt_sec_lkey: | |
01060c89 CL |
932 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY; |
933 | break; | |
934 | case Opt_sec_lkeyi: | |
01060c89 CL |
935 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI; |
936 | break; | |
937 | case Opt_sec_lkeyp: | |
01060c89 CL |
938 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP; |
939 | break; | |
940 | case Opt_sec_spkm: | |
01060c89 CL |
941 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM; |
942 | break; | |
943 | case Opt_sec_spkmi: | |
01060c89 CL |
944 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI; |
945 | break; | |
946 | case Opt_sec_spkmp: | |
01060c89 CL |
947 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP; |
948 | break; | |
949 | default: | |
950 | return 0; | |
951 | } | |
952 | ||
059f90b3 | 953 | mnt->auth_flavor_len = 1; |
01060c89 CL |
954 | return 1; |
955 | } | |
956 | ||
bf0fd768 CL |
957 | /* |
958 | * Error-check and convert a string of mount options from user space into | |
f45663ce CL |
959 | * a data structure. The whole mount string is processed; bad options are |
960 | * skipped as they are encountered. If there were no errors, return 1; | |
961 | * otherwise return 0 (zero). | |
bf0fd768 CL |
962 | */ |
963 | static int nfs_parse_mount_options(char *raw, | |
964 | struct nfs_parsed_mount_data *mnt) | |
965 | { | |
f9c3a380 | 966 | char *p, *string, *secdata; |
d23c45fd | 967 | int rc, sloppy = 0, invalid_option = 0; |
bf0fd768 CL |
968 | |
969 | if (!raw) { | |
970 | dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); | |
971 | return 1; | |
972 | } | |
973 | dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); | |
974 | ||
f9c3a380 EP |
975 | secdata = alloc_secdata(); |
976 | if (!secdata) | |
977 | goto out_nomem; | |
978 | ||
979 | rc = security_sb_copy_data(raw, secdata); | |
980 | if (rc) | |
981 | goto out_security_failure; | |
982 | ||
983 | rc = security_sb_parse_opts_str(secdata, &mnt->lsm_opts); | |
984 | if (rc) | |
985 | goto out_security_failure; | |
986 | ||
987 | free_secdata(secdata); | |
988 | ||
bf0fd768 CL |
989 | while ((p = strsep(&raw, ",")) != NULL) { |
990 | substring_t args[MAX_OPT_ARGS]; | |
a5a16bae CL |
991 | unsigned long option; |
992 | int token; | |
bf0fd768 CL |
993 | |
994 | if (!*p) | |
995 | continue; | |
996 | ||
997 | dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); | |
998 | ||
999 | token = match_token(p, nfs_mount_option_tokens, args); | |
1000 | switch (token) { | |
f45663ce CL |
1001 | |
1002 | /* | |
1003 | * boolean options: foo/nofoo | |
1004 | */ | |
bf0fd768 CL |
1005 | case Opt_soft: |
1006 | mnt->flags |= NFS_MOUNT_SOFT; | |
1007 | break; | |
1008 | case Opt_hard: | |
1009 | mnt->flags &= ~NFS_MOUNT_SOFT; | |
1010 | break; | |
bf0fd768 CL |
1011 | case Opt_posix: |
1012 | mnt->flags |= NFS_MOUNT_POSIX; | |
1013 | break; | |
1014 | case Opt_noposix: | |
1015 | mnt->flags &= ~NFS_MOUNT_POSIX; | |
1016 | break; | |
1017 | case Opt_cto: | |
1018 | mnt->flags &= ~NFS_MOUNT_NOCTO; | |
1019 | break; | |
1020 | case Opt_nocto: | |
1021 | mnt->flags |= NFS_MOUNT_NOCTO; | |
1022 | break; | |
1023 | case Opt_ac: | |
1024 | mnt->flags &= ~NFS_MOUNT_NOAC; | |
1025 | break; | |
1026 | case Opt_noac: | |
1027 | mnt->flags |= NFS_MOUNT_NOAC; | |
1028 | break; | |
1029 | case Opt_lock: | |
1030 | mnt->flags &= ~NFS_MOUNT_NONLM; | |
1031 | break; | |
1032 | case Opt_nolock: | |
1033 | mnt->flags |= NFS_MOUNT_NONLM; | |
1034 | break; | |
1035 | case Opt_v2: | |
1036 | mnt->flags &= ~NFS_MOUNT_VER3; | |
1037 | break; | |
1038 | case Opt_v3: | |
1039 | mnt->flags |= NFS_MOUNT_VER3; | |
1040 | break; | |
1041 | case Opt_udp: | |
1042 | mnt->flags &= ~NFS_MOUNT_TCP; | |
0896a725 | 1043 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 CL |
1044 | break; |
1045 | case Opt_tcp: | |
1046 | mnt->flags |= NFS_MOUNT_TCP; | |
0896a725 | 1047 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1048 | break; |
2cf7ff7a TT |
1049 | case Opt_rdma: |
1050 | mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ | |
1051 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 1052 | xprt_load_transport(p); |
2cf7ff7a | 1053 | break; |
bf0fd768 CL |
1054 | case Opt_acl: |
1055 | mnt->flags &= ~NFS_MOUNT_NOACL; | |
1056 | break; | |
1057 | case Opt_noacl: | |
1058 | mnt->flags |= NFS_MOUNT_NOACL; | |
1059 | break; | |
1060 | case Opt_rdirplus: | |
1061 | mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; | |
1062 | break; | |
1063 | case Opt_nordirplus: | |
1064 | mnt->flags |= NFS_MOUNT_NORDIRPLUS; | |
1065 | break; | |
75180df2 TM |
1066 | case Opt_sharecache: |
1067 | mnt->flags &= ~NFS_MOUNT_UNSHARED; | |
1068 | break; | |
1069 | case Opt_nosharecache: | |
1070 | mnt->flags |= NFS_MOUNT_UNSHARED; | |
1071 | break; | |
d740351b CL |
1072 | case Opt_resvport: |
1073 | mnt->flags &= ~NFS_MOUNT_NORESVPORT; | |
1074 | break; | |
1075 | case Opt_noresvport: | |
1076 | mnt->flags |= NFS_MOUNT_NORESVPORT; | |
1077 | break; | |
b797cac7 DH |
1078 | case Opt_fscache: |
1079 | mnt->options |= NFS_OPTION_FSCACHE; | |
1080 | kfree(mnt->fscache_uniq); | |
1081 | mnt->fscache_uniq = NULL; | |
1082 | break; | |
1083 | case Opt_nofscache: | |
1084 | mnt->options &= ~NFS_OPTION_FSCACHE; | |
1085 | kfree(mnt->fscache_uniq); | |
1086 | mnt->fscache_uniq = NULL; | |
1087 | break; | |
1088 | case Opt_fscache_uniq: | |
1089 | string = match_strdup(args); | |
1090 | if (!string) | |
1091 | goto out_nomem; | |
1092 | kfree(mnt->fscache_uniq); | |
1093 | mnt->fscache_uniq = string; | |
1094 | mnt->options |= NFS_OPTION_FSCACHE; | |
1095 | break; | |
bf0fd768 | 1096 | |
f45663ce CL |
1097 | /* |
1098 | * options that take numeric values | |
1099 | */ | |
bf0fd768 | 1100 | case Opt_port: |
a5a16bae CL |
1101 | string = match_strdup(args); |
1102 | if (string == NULL) | |
1103 | goto out_nomem; | |
1104 | rc = strict_strtoul(string, 10, &option); | |
1105 | kfree(string); | |
1106 | if (rc != 0 || option > USHORT_MAX) | |
d23c45fd CL |
1107 | goto out_invalid_value; |
1108 | mnt->nfs_server.port = option; | |
bf0fd768 CL |
1109 | break; |
1110 | case Opt_rsize: | |
a5a16bae CL |
1111 | string = match_strdup(args); |
1112 | if (string == NULL) | |
1113 | goto out_nomem; | |
1114 | rc = strict_strtoul(string, 10, &option); | |
1115 | kfree(string); | |
1116 | if (rc != 0) | |
d23c45fd CL |
1117 | goto out_invalid_value; |
1118 | mnt->rsize = option; | |
bf0fd768 CL |
1119 | break; |
1120 | case Opt_wsize: | |
a5a16bae CL |
1121 | string = match_strdup(args); |
1122 | if (string == NULL) | |
1123 | goto out_nomem; | |
1124 | rc = strict_strtoul(string, 10, &option); | |
1125 | kfree(string); | |
1126 | if (rc != 0) | |
d23c45fd CL |
1127 | goto out_invalid_value; |
1128 | mnt->wsize = option; | |
bf0fd768 CL |
1129 | break; |
1130 | case Opt_bsize: | |
a5a16bae CL |
1131 | string = match_strdup(args); |
1132 | if (string == NULL) | |
1133 | goto out_nomem; | |
1134 | rc = strict_strtoul(string, 10, &option); | |
1135 | kfree(string); | |
1136 | if (rc != 0) | |
d23c45fd CL |
1137 | goto out_invalid_value; |
1138 | mnt->bsize = option; | |
bf0fd768 CL |
1139 | break; |
1140 | case Opt_timeo: | |
a5a16bae CL |
1141 | string = match_strdup(args); |
1142 | if (string == NULL) | |
1143 | goto out_nomem; | |
1144 | rc = strict_strtoul(string, 10, &option); | |
1145 | kfree(string); | |
1146 | if (rc != 0 || option == 0) | |
d23c45fd CL |
1147 | goto out_invalid_value; |
1148 | mnt->timeo = option; | |
bf0fd768 CL |
1149 | break; |
1150 | case Opt_retrans: | |
a5a16bae CL |
1151 | string = match_strdup(args); |
1152 | if (string == NULL) | |
1153 | goto out_nomem; | |
1154 | rc = strict_strtoul(string, 10, &option); | |
1155 | kfree(string); | |
1156 | if (rc != 0 || option == 0) | |
d23c45fd CL |
1157 | goto out_invalid_value; |
1158 | mnt->retrans = option; | |
bf0fd768 CL |
1159 | break; |
1160 | case Opt_acregmin: | |
a5a16bae CL |
1161 | string = match_strdup(args); |
1162 | if (string == NULL) | |
1163 | goto out_nomem; | |
1164 | rc = strict_strtoul(string, 10, &option); | |
1165 | kfree(string); | |
1166 | if (rc != 0) | |
d23c45fd CL |
1167 | goto out_invalid_value; |
1168 | mnt->acregmin = option; | |
bf0fd768 CL |
1169 | break; |
1170 | case Opt_acregmax: | |
a5a16bae CL |
1171 | string = match_strdup(args); |
1172 | if (string == NULL) | |
1173 | goto out_nomem; | |
1174 | rc = strict_strtoul(string, 10, &option); | |
1175 | kfree(string); | |
1176 | if (rc != 0) | |
d23c45fd CL |
1177 | goto out_invalid_value; |
1178 | mnt->acregmax = option; | |
bf0fd768 CL |
1179 | break; |
1180 | case Opt_acdirmin: | |
a5a16bae CL |
1181 | string = match_strdup(args); |
1182 | if (string == NULL) | |
1183 | goto out_nomem; | |
1184 | rc = strict_strtoul(string, 10, &option); | |
1185 | kfree(string); | |
1186 | if (rc != 0) | |
d23c45fd CL |
1187 | goto out_invalid_value; |
1188 | mnt->acdirmin = option; | |
bf0fd768 CL |
1189 | break; |
1190 | case Opt_acdirmax: | |
a5a16bae CL |
1191 | string = match_strdup(args); |
1192 | if (string == NULL) | |
1193 | goto out_nomem; | |
1194 | rc = strict_strtoul(string, 10, &option); | |
1195 | kfree(string); | |
1196 | if (rc != 0) | |
d23c45fd CL |
1197 | goto out_invalid_value; |
1198 | mnt->acdirmax = option; | |
bf0fd768 CL |
1199 | break; |
1200 | case Opt_actimeo: | |
a5a16bae CL |
1201 | string = match_strdup(args); |
1202 | if (string == NULL) | |
1203 | goto out_nomem; | |
1204 | rc = strict_strtoul(string, 10, &option); | |
1205 | kfree(string); | |
1206 | if (rc != 0) | |
d23c45fd CL |
1207 | goto out_invalid_value; |
1208 | mnt->acregmin = mnt->acregmax = | |
1209 | mnt->acdirmin = mnt->acdirmax = option; | |
bf0fd768 CL |
1210 | break; |
1211 | case Opt_namelen: | |
a5a16bae CL |
1212 | string = match_strdup(args); |
1213 | if (string == NULL) | |
1214 | goto out_nomem; | |
1215 | rc = strict_strtoul(string, 10, &option); | |
1216 | kfree(string); | |
1217 | if (rc != 0) | |
d23c45fd CL |
1218 | goto out_invalid_value; |
1219 | mnt->namlen = option; | |
bf0fd768 CL |
1220 | break; |
1221 | case Opt_mountport: | |
a5a16bae CL |
1222 | string = match_strdup(args); |
1223 | if (string == NULL) | |
1224 | goto out_nomem; | |
1225 | rc = strict_strtoul(string, 10, &option); | |
1226 | kfree(string); | |
1227 | if (rc != 0 || option > USHORT_MAX) | |
d23c45fd CL |
1228 | goto out_invalid_value; |
1229 | mnt->mount_server.port = option; | |
bf0fd768 | 1230 | break; |
bf0fd768 | 1231 | case Opt_mountvers: |
a5a16bae CL |
1232 | string = match_strdup(args); |
1233 | if (string == NULL) | |
1234 | goto out_nomem; | |
1235 | rc = strict_strtoul(string, 10, &option); | |
1236 | kfree(string); | |
1237 | if (rc != 0 || | |
f45663ce | 1238 | option < NFS_MNT_VERSION || |
d23c45fd CL |
1239 | option > NFS_MNT3_VERSION) |
1240 | goto out_invalid_value; | |
1241 | mnt->mount_server.version = option; | |
bf0fd768 | 1242 | break; |
bf0fd768 | 1243 | case Opt_nfsvers: |
a5a16bae CL |
1244 | string = match_strdup(args); |
1245 | if (string == NULL) | |
1246 | goto out_nomem; | |
1247 | rc = strict_strtoul(string, 10, &option); | |
1248 | kfree(string); | |
1249 | if (rc != 0) | |
d23c45fd | 1250 | goto out_invalid_value; |
bf0fd768 | 1251 | switch (option) { |
f45663ce | 1252 | case NFS2_VERSION: |
bf0fd768 CL |
1253 | mnt->flags &= ~NFS_MOUNT_VER3; |
1254 | break; | |
f45663ce | 1255 | case NFS3_VERSION: |
bf0fd768 CL |
1256 | mnt->flags |= NFS_MOUNT_VER3; |
1257 | break; | |
1258 | default: | |
d23c45fd | 1259 | goto out_invalid_value; |
bf0fd768 CL |
1260 | } |
1261 | break; | |
3fd5be9e | 1262 | case Opt_minorversion: |
f3f4f4ed CL |
1263 | string = match_strdup(args); |
1264 | if (string == NULL) | |
1265 | goto out_nomem; | |
1266 | rc = strict_strtoul(string, 10, &option); | |
1267 | kfree(string); | |
1268 | if (rc != 0) | |
1269 | goto out_invalid_value; | |
1270 | if (option > NFS4_MAX_MINOR_VERSION) | |
1271 | goto out_invalid_value; | |
1272 | mnt->minorversion = option; | |
3fd5be9e | 1273 | break; |
bf0fd768 | 1274 | |
f45663ce CL |
1275 | /* |
1276 | * options that take text values | |
1277 | */ | |
bf0fd768 CL |
1278 | case Opt_sec: |
1279 | string = match_strdup(args); | |
1280 | if (string == NULL) | |
1281 | goto out_nomem; | |
01060c89 | 1282 | rc = nfs_parse_security_flavors(string, mnt); |
bf0fd768 | 1283 | kfree(string); |
f45663ce | 1284 | if (!rc) { |
f45663ce CL |
1285 | dfprintk(MOUNT, "NFS: unrecognized " |
1286 | "security flavor\n"); | |
d23c45fd | 1287 | return 0; |
f45663ce | 1288 | } |
bf0fd768 CL |
1289 | break; |
1290 | case Opt_proto: | |
1291 | string = match_strdup(args); | |
1292 | if (string == NULL) | |
1293 | goto out_nomem; | |
1294 | token = match_token(string, | |
1295 | nfs_xprt_protocol_tokens, args); | |
bf0fd768 CL |
1296 | |
1297 | switch (token) { | |
fdb66ff4 | 1298 | case Opt_xprt_udp: |
bf0fd768 | 1299 | mnt->flags &= ~NFS_MOUNT_TCP; |
0896a725 | 1300 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
d23c45fd | 1301 | kfree(string); |
bf0fd768 | 1302 | break; |
fdb66ff4 | 1303 | case Opt_xprt_tcp: |
bf0fd768 | 1304 | mnt->flags |= NFS_MOUNT_TCP; |
0896a725 | 1305 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
d23c45fd | 1306 | kfree(string); |
bf0fd768 | 1307 | break; |
2cf7ff7a TT |
1308 | case Opt_xprt_rdma: |
1309 | /* vector side protocols to TCP */ | |
1310 | mnt->flags |= NFS_MOUNT_TCP; | |
1311 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 1312 | xprt_load_transport(string); |
d23c45fd | 1313 | kfree(string); |
2cf7ff7a | 1314 | break; |
bf0fd768 | 1315 | default: |
f45663ce CL |
1316 | dfprintk(MOUNT, "NFS: unrecognized " |
1317 | "transport protocol\n"); | |
d23c45fd | 1318 | return 0; |
bf0fd768 CL |
1319 | } |
1320 | break; | |
1321 | case Opt_mountproto: | |
1322 | string = match_strdup(args); | |
1323 | if (string == NULL) | |
1324 | goto out_nomem; | |
1325 | token = match_token(string, | |
1326 | nfs_xprt_protocol_tokens, args); | |
d508afb4 | 1327 | kfree(string); |
bf0fd768 CL |
1328 | |
1329 | switch (token) { | |
fdb66ff4 | 1330 | case Opt_xprt_udp: |
0896a725 | 1331 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 | 1332 | break; |
fdb66ff4 | 1333 | case Opt_xprt_tcp: |
0896a725 | 1334 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1335 | break; |
2cf7ff7a | 1336 | case Opt_xprt_rdma: /* not used for side protocols */ |
bf0fd768 | 1337 | default: |
f45663ce CL |
1338 | dfprintk(MOUNT, "NFS: unrecognized " |
1339 | "transport protocol\n"); | |
d23c45fd | 1340 | return 0; |
bf0fd768 CL |
1341 | } |
1342 | break; | |
1343 | case Opt_addr: | |
1344 | string = match_strdup(args); | |
1345 | if (string == NULL) | |
1346 | goto out_nomem; | |
ce3b7e19 CL |
1347 | nfs_parse_ip_address(string, strlen(string), |
1348 | (struct sockaddr *) | |
1349 | &mnt->nfs_server.address, | |
1350 | &mnt->nfs_server.addrlen); | |
bf0fd768 CL |
1351 | kfree(string); |
1352 | break; | |
1353 | case Opt_clientaddr: | |
1354 | string = match_strdup(args); | |
1355 | if (string == NULL) | |
1356 | goto out_nomem; | |
fc601477 | 1357 | kfree(mnt->client_address); |
bf0fd768 CL |
1358 | mnt->client_address = string; |
1359 | break; | |
33832034 CL |
1360 | case Opt_mounthost: |
1361 | string = match_strdup(args); | |
1362 | if (string == NULL) | |
1363 | goto out_nomem; | |
fc601477 | 1364 | kfree(mnt->mount_server.hostname); |
33832034 CL |
1365 | mnt->mount_server.hostname = string; |
1366 | break; | |
0ac83779 | 1367 | case Opt_mountaddr: |
bf0fd768 CL |
1368 | string = match_strdup(args); |
1369 | if (string == NULL) | |
1370 | goto out_nomem; | |
ce3b7e19 CL |
1371 | nfs_parse_ip_address(string, strlen(string), |
1372 | (struct sockaddr *) | |
1373 | &mnt->mount_server.address, | |
1374 | &mnt->mount_server.addrlen); | |
bf0fd768 CL |
1375 | kfree(string); |
1376 | break; | |
7973c1f1 TM |
1377 | case Opt_lookupcache: |
1378 | string = match_strdup(args); | |
1379 | if (string == NULL) | |
1380 | goto out_nomem; | |
1381 | token = match_token(string, | |
1382 | nfs_lookupcache_tokens, args); | |
1383 | kfree(string); | |
1384 | switch (token) { | |
1385 | case Opt_lookupcache_all: | |
1386 | mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); | |
1387 | break; | |
1388 | case Opt_lookupcache_positive: | |
1389 | mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1390 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; | |
1391 | break; | |
1392 | case Opt_lookupcache_none: | |
1393 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1394 | break; | |
1395 | default: | |
7973c1f1 TM |
1396 | dfprintk(MOUNT, "NFS: invalid " |
1397 | "lookupcache argument\n"); | |
d23c45fd | 1398 | return 0; |
7973c1f1 TM |
1399 | }; |
1400 | break; | |
bf0fd768 | 1401 | |
f45663ce CL |
1402 | /* |
1403 | * Special options | |
1404 | */ | |
1405 | case Opt_sloppy: | |
1406 | sloppy = 1; | |
1407 | dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); | |
1408 | break; | |
bf0fd768 CL |
1409 | case Opt_userspace: |
1410 | case Opt_deprecated: | |
d33e4dfe CL |
1411 | dfprintk(MOUNT, "NFS: ignoring mount option " |
1412 | "'%s'\n", p); | |
bf0fd768 CL |
1413 | break; |
1414 | ||
1415 | default: | |
d23c45fd | 1416 | invalid_option = 1; |
f45663ce CL |
1417 | dfprintk(MOUNT, "NFS: unrecognized mount option " |
1418 | "'%s'\n", p); | |
bf0fd768 CL |
1419 | } |
1420 | } | |
1421 | ||
d23c45fd CL |
1422 | if (!sloppy && invalid_option) |
1423 | return 0; | |
1424 | ||
bf0fd768 CL |
1425 | return 1; |
1426 | ||
d23c45fd CL |
1427 | out_invalid_value: |
1428 | printk(KERN_INFO "NFS: bad mount option value specified: %s \n", p); | |
1429 | return 0; | |
bf0fd768 CL |
1430 | out_nomem: |
1431 | printk(KERN_INFO "NFS: not enough memory to parse option\n"); | |
1432 | return 0; | |
f9c3a380 EP |
1433 | out_security_failure: |
1434 | free_secdata(secdata); | |
1435 | printk(KERN_INFO "NFS: security options invalid: %d\n", rc); | |
1436 | return 0; | |
bf0fd768 CL |
1437 | } |
1438 | ||
0076d7b7 CL |
1439 | /* |
1440 | * Use the remote server's MOUNT service to request the NFS file handle | |
1441 | * corresponding to the provided path. | |
1442 | */ | |
1443 | static int nfs_try_mount(struct nfs_parsed_mount_data *args, | |
1444 | struct nfs_fh *root_fh) | |
1445 | { | |
8e02f6b9 | 1446 | unsigned int auth_flavor_len = 0; |
c5d120f8 CL |
1447 | struct nfs_mount_request request = { |
1448 | .sap = (struct sockaddr *) | |
1449 | &args->mount_server.address, | |
1450 | .dirpath = args->nfs_server.export_path, | |
1451 | .protocol = args->mount_server.protocol, | |
1452 | .fh = root_fh, | |
50a737f8 | 1453 | .noresvport = args->flags & NFS_MOUNT_NORESVPORT, |
8e02f6b9 | 1454 | .auth_flav_len = &auth_flavor_len, |
c5d120f8 | 1455 | }; |
4c568017 | 1456 | int status; |
0076d7b7 CL |
1457 | |
1458 | if (args->mount_server.version == 0) { | |
1459 | if (args->flags & NFS_MOUNT_VER3) | |
1460 | args->mount_server.version = NFS_MNT3_VERSION; | |
1461 | else | |
1462 | args->mount_server.version = NFS_MNT_VERSION; | |
1463 | } | |
c5d120f8 | 1464 | request.version = args->mount_server.version; |
0076d7b7 | 1465 | |
33832034 | 1466 | if (args->mount_server.hostname) |
c5d120f8 | 1467 | request.hostname = args->mount_server.hostname; |
33832034 | 1468 | else |
c5d120f8 | 1469 | request.hostname = args->nfs_server.hostname; |
33832034 | 1470 | |
0076d7b7 CL |
1471 | /* |
1472 | * Construct the mount server's address. | |
1473 | */ | |
4c568017 | 1474 | if (args->mount_server.address.ss_family == AF_UNSPEC) { |
c5d120f8 | 1475 | memcpy(request.sap, &args->nfs_server.address, |
4c568017 CL |
1476 | args->nfs_server.addrlen); |
1477 | args->mount_server.addrlen = args->nfs_server.addrlen; | |
1478 | } | |
c5d120f8 | 1479 | request.salen = args->mount_server.addrlen; |
4c568017 | 1480 | |
aad70007 JL |
1481 | /* |
1482 | * autobind will be used if mount_server.port == 0 | |
1483 | */ | |
c5d120f8 | 1484 | nfs_set_port(request.sap, args->mount_server.port); |
0076d7b7 CL |
1485 | |
1486 | /* | |
1487 | * Now ask the mount server to map our export path | |
1488 | * to a file handle. | |
1489 | */ | |
c5d120f8 | 1490 | status = nfs_mount(&request); |
efd8340b CL |
1491 | if (status == 0) |
1492 | return 0; | |
0076d7b7 | 1493 | |
396cee97 | 1494 | dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n", |
c5d120f8 | 1495 | request.hostname, status); |
0076d7b7 CL |
1496 | return status; |
1497 | } | |
1498 | ||
d1aa0825 CL |
1499 | static int nfs_parse_simple_hostname(const char *dev_name, |
1500 | char **hostname, size_t maxnamlen, | |
1501 | char **export_path, size_t maxpathlen) | |
dc045898 CL |
1502 | { |
1503 | size_t len; | |
1504 | char *colon, *comma; | |
1505 | ||
1506 | colon = strchr(dev_name, ':'); | |
1507 | if (colon == NULL) | |
1508 | goto out_bad_devname; | |
1509 | ||
1510 | len = colon - dev_name; | |
1511 | if (len > maxnamlen) | |
1512 | goto out_hostname; | |
1513 | ||
1514 | /* N.B. caller will free nfs_server.hostname in all cases */ | |
1515 | *hostname = kstrndup(dev_name, len, GFP_KERNEL); | |
1516 | if (!*hostname) | |
1517 | goto out_nomem; | |
1518 | ||
1519 | /* kill possible hostname list: not supported */ | |
1520 | comma = strchr(*hostname, ','); | |
1521 | if (comma != NULL) { | |
1522 | if (comma == *hostname) | |
1523 | goto out_bad_devname; | |
1524 | *comma = '\0'; | |
1525 | } | |
1526 | ||
1527 | colon++; | |
1528 | len = strlen(colon); | |
1529 | if (len > maxpathlen) | |
1530 | goto out_path; | |
1531 | *export_path = kstrndup(colon, len, GFP_KERNEL); | |
1532 | if (!*export_path) | |
1533 | goto out_nomem; | |
1534 | ||
1535 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path); | |
1536 | return 0; | |
1537 | ||
1538 | out_bad_devname: | |
1539 | dfprintk(MOUNT, "NFS: device name not in host:path format\n"); | |
1540 | return -EINVAL; | |
1541 | ||
1542 | out_nomem: | |
1543 | dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); | |
1544 | return -ENOMEM; | |
1545 | ||
1546 | out_hostname: | |
1547 | dfprintk(MOUNT, "NFS: server hostname too long\n"); | |
1548 | return -ENAMETOOLONG; | |
1549 | ||
1550 | out_path: | |
1551 | dfprintk(MOUNT, "NFS: export pathname too long\n"); | |
1552 | return -ENAMETOOLONG; | |
1553 | } | |
1554 | ||
d1aa0825 CL |
1555 | /* |
1556 | * Hostname has square brackets around it because it contains one or | |
1557 | * more colons. We look for the first closing square bracket, and a | |
1558 | * colon must follow it. | |
1559 | */ | |
1560 | static int nfs_parse_protected_hostname(const char *dev_name, | |
1561 | char **hostname, size_t maxnamlen, | |
1562 | char **export_path, size_t maxpathlen) | |
1563 | { | |
1564 | size_t len; | |
1565 | char *start, *end; | |
1566 | ||
1567 | start = (char *)(dev_name + 1); | |
1568 | ||
1569 | end = strchr(start, ']'); | |
1570 | if (end == NULL) | |
1571 | goto out_bad_devname; | |
1572 | if (*(end + 1) != ':') | |
1573 | goto out_bad_devname; | |
1574 | ||
1575 | len = end - start; | |
1576 | if (len > maxnamlen) | |
1577 | goto out_hostname; | |
1578 | ||
1579 | /* N.B. caller will free nfs_server.hostname in all cases */ | |
1580 | *hostname = kstrndup(start, len, GFP_KERNEL); | |
1581 | if (*hostname == NULL) | |
1582 | goto out_nomem; | |
1583 | ||
1584 | end += 2; | |
1585 | len = strlen(end); | |
1586 | if (len > maxpathlen) | |
1587 | goto out_path; | |
1588 | *export_path = kstrndup(end, len, GFP_KERNEL); | |
1589 | if (!*export_path) | |
1590 | goto out_nomem; | |
1591 | ||
1592 | return 0; | |
1593 | ||
1594 | out_bad_devname: | |
1595 | dfprintk(MOUNT, "NFS: device name not in host:path format\n"); | |
1596 | return -EINVAL; | |
1597 | ||
1598 | out_nomem: | |
1599 | dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); | |
1600 | return -ENOMEM; | |
1601 | ||
1602 | out_hostname: | |
1603 | dfprintk(MOUNT, "NFS: server hostname too long\n"); | |
1604 | return -ENAMETOOLONG; | |
1605 | ||
1606 | out_path: | |
1607 | dfprintk(MOUNT, "NFS: export pathname too long\n"); | |
1608 | return -ENAMETOOLONG; | |
1609 | } | |
1610 | ||
1611 | /* | |
1612 | * Split "dev_name" into "hostname:export_path". | |
1613 | * | |
1614 | * The leftmost colon demarks the split between the server's hostname | |
1615 | * and the export path. If the hostname starts with a left square | |
1616 | * bracket, then it may contain colons. | |
1617 | * | |
1618 | * Note: caller frees hostname and export path, even on error. | |
1619 | */ | |
1620 | static int nfs_parse_devname(const char *dev_name, | |
1621 | char **hostname, size_t maxnamlen, | |
1622 | char **export_path, size_t maxpathlen) | |
1623 | { | |
1624 | if (*dev_name == '[') | |
1625 | return nfs_parse_protected_hostname(dev_name, | |
1626 | hostname, maxnamlen, | |
1627 | export_path, maxpathlen); | |
1628 | ||
1629 | return nfs_parse_simple_hostname(dev_name, | |
1630 | hostname, maxnamlen, | |
1631 | export_path, maxpathlen); | |
1632 | } | |
1633 | ||
f7b422b1 | 1634 | /* |
54ceac45 DH |
1635 | * Validate the NFS2/NFS3 mount data |
1636 | * - fills in the mount root filehandle | |
136d558c CL |
1637 | * |
1638 | * For option strings, user space handles the following behaviors: | |
1639 | * | |
1640 | * + DNS: mapping server host name to IP address ("addr=" option) | |
1641 | * | |
1642 | * + failure mode: how to behave if a mount request can't be handled | |
1643 | * immediately ("fg/bg" option) | |
1644 | * | |
1645 | * + retry: how often to retry a mount request ("retry=" option) | |
1646 | * | |
1647 | * + breaking back: trying proto=udp after proto=tcp, v2 after v3, | |
1648 | * mountproto=tcp after mountproto=udp, and so on | |
f7b422b1 | 1649 | */ |
2283f8d6 TT |
1650 | static int nfs_validate_mount_data(void *options, |
1651 | struct nfs_parsed_mount_data *args, | |
136d558c CL |
1652 | struct nfs_fh *mntfh, |
1653 | const char *dev_name) | |
f7b422b1 | 1654 | { |
2283f8d6 | 1655 | struct nfs_mount_data *data = (struct nfs_mount_data *)options; |
136d558c | 1656 | |
5df36e78 CL |
1657 | if (data == NULL) |
1658 | goto out_no_data; | |
f7b422b1 | 1659 | |
2283f8d6 TT |
1660 | args->flags = (NFS_MOUNT_VER3 | NFS_MOUNT_TCP); |
1661 | args->rsize = NFS_MAX_FILE_IO_SIZE; | |
1662 | args->wsize = NFS_MAX_FILE_IO_SIZE; | |
0e0cab74 CL |
1663 | args->acregmin = NFS_DEF_ACREGMIN; |
1664 | args->acregmax = NFS_DEF_ACREGMAX; | |
1665 | args->acdirmin = NFS_DEF_ACDIRMIN; | |
1666 | args->acdirmax = NFS_DEF_ACDIRMAX; | |
f22d6d79 | 1667 | args->mount_server.port = 0; /* autobind unless user sets port */ |
f22d6d79 | 1668 | args->nfs_server.port = 0; /* autobind unless user sets port */ |
0896a725 | 1669 | args->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
dd07c947 | 1670 | args->auth_flavors[0] = RPC_AUTH_UNIX; |
059f90b3 | 1671 | args->auth_flavor_len = 1; |
2283f8d6 | 1672 | |
54ceac45 | 1673 | switch (data->version) { |
5df36e78 CL |
1674 | case 1: |
1675 | data->namlen = 0; | |
1676 | case 2: | |
1677 | data->bsize = 0; | |
1678 | case 3: | |
1679 | if (data->flags & NFS_MOUNT_VER3) | |
1680 | goto out_no_v3; | |
1681 | data->root.size = NFS2_FHSIZE; | |
1682 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
1683 | case 4: | |
1684 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1685 | goto out_no_sec; | |
1686 | case 5: | |
1687 | memset(data->context, 0, sizeof(data->context)); | |
1688 | case 6: | |
b7e24457 TM |
1689 | if (data->flags & NFS_MOUNT_VER3) { |
1690 | if (data->root.size > NFS3_FHSIZE || data->root.size == 0) | |
1691 | goto out_invalid_fh; | |
5df36e78 | 1692 | mntfh->size = data->root.size; |
b7e24457 | 1693 | } else |
5df36e78 CL |
1694 | mntfh->size = NFS2_FHSIZE; |
1695 | ||
5df36e78 CL |
1696 | |
1697 | memcpy(mntfh->data, data->root.data, mntfh->size); | |
1698 | if (mntfh->size < sizeof(mntfh->data)) | |
1699 | memset(mntfh->data + mntfh->size, 0, | |
1700 | sizeof(mntfh->data) - mntfh->size); | |
6e88e061 | 1701 | |
2283f8d6 TT |
1702 | /* |
1703 | * Translate to nfs_parsed_mount_data, which nfs_fill_super | |
1704 | * can deal with. | |
1705 | */ | |
ff3525a5 | 1706 | args->flags = data->flags & NFS_MOUNT_FLAGMASK; |
2283f8d6 TT |
1707 | args->rsize = data->rsize; |
1708 | args->wsize = data->wsize; | |
2283f8d6 TT |
1709 | args->timeo = data->timeo; |
1710 | args->retrans = data->retrans; | |
1711 | args->acregmin = data->acregmin; | |
1712 | args->acregmax = data->acregmax; | |
1713 | args->acdirmin = data->acdirmin; | |
1714 | args->acdirmax = data->acdirmax; | |
4c568017 CL |
1715 | |
1716 | memcpy(&args->nfs_server.address, &data->addr, | |
1717 | sizeof(data->addr)); | |
1718 | args->nfs_server.addrlen = sizeof(data->addr); | |
1719 | if (!nfs_verify_server_address((struct sockaddr *) | |
1720 | &args->nfs_server.address)) | |
1721 | goto out_no_address; | |
1722 | ||
2283f8d6 | 1723 | if (!(data->flags & NFS_MOUNT_TCP)) |
0896a725 | 1724 | args->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
2283f8d6 TT |
1725 | /* N.B. caller will free nfs_server.hostname in all cases */ |
1726 | args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); | |
1727 | args->namlen = data->namlen; | |
1728 | args->bsize = data->bsize; | |
dd07c947 CL |
1729 | |
1730 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1731 | args->auth_flavors[0] = data->pseudoflavor; | |
63649bd7 CG |
1732 | if (!args->nfs_server.hostname) |
1733 | goto out_nomem; | |
f9c3a380 EP |
1734 | |
1735 | /* | |
1736 | * The legacy version 6 binary mount data from userspace has a | |
1737 | * field used only to transport selinux information into the | |
1738 | * the kernel. To continue to support that functionality we | |
1739 | * have a touch of selinux knowledge here in the NFS code. The | |
1740 | * userspace code converted context=blah to just blah so we are | |
1741 | * converting back to the full string selinux understands. | |
1742 | */ | |
1743 | if (data->context[0]){ | |
1744 | #ifdef CONFIG_SECURITY_SELINUX | |
1745 | int rc; | |
1746 | char *opts_str = kmalloc(sizeof(data->context) + 8, GFP_KERNEL); | |
1747 | if (!opts_str) | |
1748 | return -ENOMEM; | |
1749 | strcpy(opts_str, "context="); | |
1750 | data->context[NFS_MAX_CONTEXT_LEN] = '\0'; | |
1751 | strcat(opts_str, &data->context[0]); | |
1752 | rc = security_sb_parse_opts_str(opts_str, &args->lsm_opts); | |
1753 | kfree(opts_str); | |
1754 | if (rc) | |
1755 | return rc; | |
1756 | #else | |
1757 | return -EINVAL; | |
1758 | #endif | |
1759 | } | |
1760 | ||
5df36e78 | 1761 | break; |
136d558c | 1762 | default: { |
136d558c | 1763 | int status; |
136d558c | 1764 | |
2283f8d6 TT |
1765 | if (nfs_parse_mount_options((char *)options, args) == 0) |
1766 | return -EINVAL; | |
136d558c | 1767 | |
6e88e061 CL |
1768 | if (!nfs_verify_server_address((struct sockaddr *) |
1769 | &args->nfs_server.address)) | |
1770 | goto out_no_address; | |
1771 | ||
ed596a8a CL |
1772 | nfs_set_port((struct sockaddr *)&args->nfs_server.address, |
1773 | args->nfs_server.port); | |
1774 | ||
259875ef TM |
1775 | nfs_set_mount_transport_protocol(args); |
1776 | ||
dc045898 CL |
1777 | status = nfs_parse_devname(dev_name, |
1778 | &args->nfs_server.hostname, | |
1779 | PAGE_SIZE, | |
1780 | &args->nfs_server.export_path, | |
1781 | NFS_MAXPATHLEN); | |
1782 | if (!status) | |
1783 | status = nfs_try_mount(args, mntfh); | |
136d558c | 1784 | |
dc045898 CL |
1785 | kfree(args->nfs_server.export_path); |
1786 | args->nfs_server.export_path = NULL; | |
136d558c | 1787 | |
136d558c | 1788 | if (status) |
fdc6e2c8 | 1789 | return status; |
136d558c | 1790 | |
136d558c CL |
1791 | break; |
1792 | } | |
f7b422b1 | 1793 | } |
54ceac45 DH |
1794 | |
1795 | #ifndef CONFIG_NFS_V3 | |
2283f8d6 | 1796 | if (args->flags & NFS_MOUNT_VER3) |
5df36e78 CL |
1797 | goto out_v3_not_compiled; |
1798 | #endif /* !CONFIG_NFS_V3 */ | |
f7b422b1 | 1799 | |
5df36e78 | 1800 | return 0; |
f7b422b1 | 1801 | |
5df36e78 CL |
1802 | out_no_data: |
1803 | dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); | |
1804 | return -EINVAL; | |
54ceac45 | 1805 | |
5df36e78 CL |
1806 | out_no_v3: |
1807 | dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", | |
1808 | data->version); | |
1809 | return -EINVAL; | |
f7b422b1 | 1810 | |
5df36e78 CL |
1811 | out_no_sec: |
1812 | dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); | |
1813 | return -EINVAL; | |
1814 | ||
5df36e78 CL |
1815 | #ifndef CONFIG_NFS_V3 |
1816 | out_v3_not_compiled: | |
1817 | dfprintk(MOUNT, "NFS: NFSv3 is not compiled into kernel\n"); | |
1818 | return -EPROTONOSUPPORT; | |
1819 | #endif /* !CONFIG_NFS_V3 */ | |
1820 | ||
63649bd7 CG |
1821 | out_nomem: |
1822 | dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); | |
1823 | return -ENOMEM; | |
1824 | ||
5df36e78 CL |
1825 | out_no_address: |
1826 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); | |
1827 | return -EINVAL; | |
1828 | ||
1829 | out_invalid_fh: | |
1830 | dfprintk(MOUNT, "NFS: invalid root filehandle\n"); | |
1831 | return -EINVAL; | |
f7b422b1 DH |
1832 | } |
1833 | ||
48b605f8 JL |
1834 | static int |
1835 | nfs_compare_remount_data(struct nfs_server *nfss, | |
1836 | struct nfs_parsed_mount_data *data) | |
1837 | { | |
1838 | if (data->flags != nfss->flags || | |
1839 | data->rsize != nfss->rsize || | |
1840 | data->wsize != nfss->wsize || | |
1841 | data->retrans != nfss->client->cl_timeout->to_retries || | |
1842 | data->auth_flavors[0] != nfss->client->cl_auth->au_flavor || | |
1843 | data->acregmin != nfss->acregmin / HZ || | |
1844 | data->acregmax != nfss->acregmax / HZ || | |
1845 | data->acdirmin != nfss->acdirmin / HZ || | |
1846 | data->acdirmax != nfss->acdirmax / HZ || | |
1847 | data->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) || | |
1848 | data->nfs_server.addrlen != nfss->nfs_client->cl_addrlen || | |
1849 | memcmp(&data->nfs_server.address, &nfss->nfs_client->cl_addr, | |
1850 | data->nfs_server.addrlen) != 0) | |
1851 | return -EINVAL; | |
1852 | ||
1853 | return 0; | |
1854 | } | |
1855 | ||
1856 | static int | |
1857 | nfs_remount(struct super_block *sb, int *flags, char *raw_data) | |
1858 | { | |
1859 | int error; | |
1860 | struct nfs_server *nfss = sb->s_fs_info; | |
1861 | struct nfs_parsed_mount_data *data; | |
1862 | struct nfs_mount_data *options = (struct nfs_mount_data *)raw_data; | |
1863 | struct nfs4_mount_data *options4 = (struct nfs4_mount_data *)raw_data; | |
cd100725 | 1864 | u32 nfsvers = nfss->nfs_client->rpc_ops->version; |
48b605f8 JL |
1865 | |
1866 | /* | |
1867 | * Userspace mount programs that send binary options generally send | |
1868 | * them populated with default values. We have no way to know which | |
1869 | * ones were explicitly specified. Fall back to legacy behavior and | |
1870 | * just return success. | |
1871 | */ | |
31c94469 MZ |
1872 | if ((nfsvers == 4 && (!options4 || options4->version == 1)) || |
1873 | (nfsvers <= 3 && (!options || (options->version >= 1 && | |
1874 | options->version <= 6)))) | |
48b605f8 JL |
1875 | return 0; |
1876 | ||
1877 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
1878 | if (data == NULL) | |
1879 | return -ENOMEM; | |
1880 | ||
337eb00a | 1881 | lock_kernel(); |
48b605f8 JL |
1882 | /* fill out struct with values from existing mount */ |
1883 | data->flags = nfss->flags; | |
1884 | data->rsize = nfss->rsize; | |
1885 | data->wsize = nfss->wsize; | |
1886 | data->retrans = nfss->client->cl_timeout->to_retries; | |
1887 | data->auth_flavors[0] = nfss->client->cl_auth->au_flavor; | |
1888 | data->acregmin = nfss->acregmin / HZ; | |
1889 | data->acregmax = nfss->acregmax / HZ; | |
1890 | data->acdirmin = nfss->acdirmin / HZ; | |
1891 | data->acdirmax = nfss->acdirmax / HZ; | |
1892 | data->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; | |
1893 | data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; | |
1894 | memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr, | |
1895 | data->nfs_server.addrlen); | |
1896 | ||
1897 | /* overwrite those values with any that were specified */ | |
1898 | error = nfs_parse_mount_options((char *)options, data); | |
1899 | if (error < 0) | |
1900 | goto out; | |
1901 | ||
1902 | /* compare new mount options with old ones */ | |
1903 | error = nfs_compare_remount_data(nfss, data); | |
1904 | out: | |
1905 | kfree(data); | |
337eb00a | 1906 | unlock_kernel(); |
48b605f8 JL |
1907 | return error; |
1908 | } | |
1909 | ||
f7b422b1 | 1910 | /* |
54ceac45 | 1911 | * Initialise the common bits of the superblock |
f7b422b1 | 1912 | */ |
54ceac45 | 1913 | static inline void nfs_initialise_sb(struct super_block *sb) |
f7b422b1 | 1914 | { |
54ceac45 | 1915 | struct nfs_server *server = NFS_SB(sb); |
5006a76c | 1916 | |
54ceac45 | 1917 | sb->s_magic = NFS_SUPER_MAGIC; |
f7b422b1 | 1918 | |
54ceac45 DH |
1919 | /* We probably want something more informative here */ |
1920 | snprintf(sb->s_id, sizeof(sb->s_id), | |
1921 | "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev)); | |
5006a76c | 1922 | |
54ceac45 DH |
1923 | if (sb->s_blocksize == 0) |
1924 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
1925 | &sb->s_blocksize_bits); | |
f7b422b1 | 1926 | |
54ceac45 DH |
1927 | if (server->flags & NFS_MOUNT_NOAC) |
1928 | sb->s_flags |= MS_SYNCHRONOUS; | |
f7b422b1 | 1929 | |
54ceac45 | 1930 | nfs_super_set_maxbytes(sb, server->maxfilesize); |
f7b422b1 DH |
1931 | } |
1932 | ||
1933 | /* | |
54ceac45 | 1934 | * Finish setting up an NFS2/3 superblock |
f7b422b1 | 1935 | */ |
2283f8d6 TT |
1936 | static void nfs_fill_super(struct super_block *sb, |
1937 | struct nfs_parsed_mount_data *data) | |
f7b422b1 DH |
1938 | { |
1939 | struct nfs_server *server = NFS_SB(sb); | |
5006a76c | 1940 | |
54ceac45 DH |
1941 | sb->s_blocksize_bits = 0; |
1942 | sb->s_blocksize = 0; | |
1943 | if (data->bsize) | |
1944 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); | |
f7b422b1 | 1945 | |
54ceac45 DH |
1946 | if (server->flags & NFS_MOUNT_VER3) { |
1947 | /* The VFS shouldn't apply the umask to mode bits. We will do | |
1948 | * so ourselves when necessary. | |
1949 | */ | |
1950 | sb->s_flags |= MS_POSIXACL; | |
1951 | sb->s_time_gran = 1; | |
816724e6 | 1952 | } |
54ceac45 DH |
1953 | |
1954 | sb->s_op = &nfs_sops; | |
1955 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1956 | } |
1957 | ||
1958 | /* | |
54ceac45 | 1959 | * Finish setting up a cloned NFS2/3 superblock |
f7b422b1 | 1960 | */ |
54ceac45 DH |
1961 | static void nfs_clone_super(struct super_block *sb, |
1962 | const struct super_block *old_sb) | |
f7b422b1 | 1963 | { |
54ceac45 DH |
1964 | struct nfs_server *server = NFS_SB(sb); |
1965 | ||
1966 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; | |
1967 | sb->s_blocksize = old_sb->s_blocksize; | |
1968 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 1969 | |
f7b422b1 | 1970 | if (server->flags & NFS_MOUNT_VER3) { |
54ceac45 DH |
1971 | /* The VFS shouldn't apply the umask to mode bits. We will do |
1972 | * so ourselves when necessary. | |
f7b422b1 DH |
1973 | */ |
1974 | sb->s_flags |= MS_POSIXACL; | |
f7b422b1 | 1975 | sb->s_time_gran = 1; |
f7b422b1 DH |
1976 | } |
1977 | ||
54ceac45 DH |
1978 | sb->s_op = old_sb->s_op; |
1979 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1980 | } |
1981 | ||
275a5d24 TM |
1982 | static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags) |
1983 | { | |
1984 | const struct nfs_server *a = s->s_fs_info; | |
1985 | const struct rpc_clnt *clnt_a = a->client; | |
1986 | const struct rpc_clnt *clnt_b = b->client; | |
1987 | ||
1988 | if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK)) | |
1989 | goto Ebusy; | |
1990 | if (a->nfs_client != b->nfs_client) | |
1991 | goto Ebusy; | |
1992 | if (a->flags != b->flags) | |
1993 | goto Ebusy; | |
1994 | if (a->wsize != b->wsize) | |
1995 | goto Ebusy; | |
1996 | if (a->rsize != b->rsize) | |
1997 | goto Ebusy; | |
1998 | if (a->acregmin != b->acregmin) | |
1999 | goto Ebusy; | |
2000 | if (a->acregmax != b->acregmax) | |
2001 | goto Ebusy; | |
2002 | if (a->acdirmin != b->acdirmin) | |
2003 | goto Ebusy; | |
2004 | if (a->acdirmax != b->acdirmax) | |
2005 | goto Ebusy; | |
2006 | if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) | |
2007 | goto Ebusy; | |
e89a5a43 | 2008 | return 1; |
275a5d24 | 2009 | Ebusy: |
e89a5a43 TM |
2010 | return 0; |
2011 | } | |
2012 | ||
2013 | struct nfs_sb_mountdata { | |
2014 | struct nfs_server *server; | |
2015 | int mntflags; | |
2016 | }; | |
2017 | ||
2018 | static int nfs_set_super(struct super_block *s, void *data) | |
2019 | { | |
2020 | struct nfs_sb_mountdata *sb_mntdata = data; | |
2021 | struct nfs_server *server = sb_mntdata->server; | |
2022 | int ret; | |
2023 | ||
2024 | s->s_flags = sb_mntdata->mntflags; | |
2025 | s->s_fs_info = server; | |
2026 | ret = set_anon_super(s, server); | |
2027 | if (ret == 0) | |
2028 | server->s_dev = s->s_dev; | |
2029 | return ret; | |
2030 | } | |
2031 | ||
fd00a8ff CL |
2032 | static int nfs_compare_super_address(struct nfs_server *server1, |
2033 | struct nfs_server *server2) | |
2034 | { | |
2035 | struct sockaddr *sap1, *sap2; | |
2036 | ||
2037 | sap1 = (struct sockaddr *)&server1->nfs_client->cl_addr; | |
2038 | sap2 = (struct sockaddr *)&server2->nfs_client->cl_addr; | |
2039 | ||
2040 | if (sap1->sa_family != sap2->sa_family) | |
2041 | return 0; | |
2042 | ||
2043 | switch (sap1->sa_family) { | |
2044 | case AF_INET: { | |
2045 | struct sockaddr_in *sin1 = (struct sockaddr_in *)sap1; | |
2046 | struct sockaddr_in *sin2 = (struct sockaddr_in *)sap2; | |
2047 | if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) | |
2048 | return 0; | |
2049 | if (sin1->sin_port != sin2->sin_port) | |
2050 | return 0; | |
2051 | break; | |
2052 | } | |
2053 | case AF_INET6: { | |
2054 | struct sockaddr_in6 *sin1 = (struct sockaddr_in6 *)sap1; | |
2055 | struct sockaddr_in6 *sin2 = (struct sockaddr_in6 *)sap2; | |
2056 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) | |
2057 | return 0; | |
2058 | if (sin1->sin6_port != sin2->sin6_port) | |
2059 | return 0; | |
2060 | break; | |
2061 | } | |
2062 | default: | |
2063 | return 0; | |
2064 | } | |
2065 | ||
2066 | return 1; | |
2067 | } | |
2068 | ||
e89a5a43 TM |
2069 | static int nfs_compare_super(struct super_block *sb, void *data) |
2070 | { | |
2071 | struct nfs_sb_mountdata *sb_mntdata = data; | |
2072 | struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb); | |
2073 | int mntflags = sb_mntdata->mntflags; | |
2074 | ||
fd00a8ff | 2075 | if (!nfs_compare_super_address(old, server)) |
e89a5a43 TM |
2076 | return 0; |
2077 | /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */ | |
2078 | if (old->flags & NFS_MOUNT_UNSHARED) | |
2079 | return 0; | |
2080 | if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0) | |
2081 | return 0; | |
2082 | return nfs_compare_mount_options(sb, server, mntflags); | |
275a5d24 TM |
2083 | } |
2084 | ||
fa799759 MS |
2085 | static int nfs_bdi_register(struct nfs_server *server) |
2086 | { | |
2087 | return bdi_register_dev(&server->backing_dev_info, server->s_dev); | |
2088 | } | |
2089 | ||
816724e6 TM |
2090 | static int nfs_get_sb(struct file_system_type *fs_type, |
2091 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
f7b422b1 | 2092 | { |
f7b422b1 DH |
2093 | struct nfs_server *server = NULL; |
2094 | struct super_block *s; | |
33852a1f TM |
2095 | struct nfs_parsed_mount_data *data; |
2096 | struct nfs_fh *mntfh; | |
54ceac45 | 2097 | struct dentry *mntroot; |
75180df2 | 2098 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2099 | struct nfs_sb_mountdata sb_mntdata = { |
2100 | .mntflags = flags, | |
2101 | }; | |
33852a1f TM |
2102 | int error = -ENOMEM; |
2103 | ||
2104 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2105 | mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL); | |
2106 | if (data == NULL || mntfh == NULL) | |
2107 | goto out_free_fh; | |
f7b422b1 | 2108 | |
33852a1f | 2109 | security_init_mnt_opts(&data->lsm_opts); |
f9c3a380 | 2110 | |
54ceac45 | 2111 | /* Validate the mount data */ |
33852a1f | 2112 | error = nfs_validate_mount_data(raw_data, data, mntfh, dev_name); |
54ceac45 | 2113 | if (error < 0) |
0655960f | 2114 | goto out; |
f7b422b1 | 2115 | |
54ceac45 | 2116 | /* Get a volume representation */ |
33852a1f | 2117 | server = nfs_create_server(data, mntfh); |
54ceac45 DH |
2118 | if (IS_ERR(server)) { |
2119 | error = PTR_ERR(server); | |
0655960f | 2120 | goto out; |
f7b422b1 | 2121 | } |
e89a5a43 | 2122 | sb_mntdata.server = server; |
f7b422b1 | 2123 | |
75180df2 TM |
2124 | if (server->flags & NFS_MOUNT_UNSHARED) |
2125 | compare_super = NULL; | |
2126 | ||
54ceac45 | 2127 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 2128 | s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
2129 | if (IS_ERR(s)) { |
2130 | error = PTR_ERR(s); | |
54ceac45 | 2131 | goto out_err_nosb; |
816724e6 TM |
2132 | } |
2133 | ||
54ceac45 DH |
2134 | if (s->s_fs_info != server) { |
2135 | nfs_free_server(server); | |
2136 | server = NULL; | |
fa799759 MS |
2137 | } else { |
2138 | error = nfs_bdi_register(server); | |
2139 | if (error) | |
2140 | goto error_splat_super; | |
54ceac45 | 2141 | } |
f7b422b1 | 2142 | |
54ceac45 DH |
2143 | if (!s->s_root) { |
2144 | /* initial superblock/root creation */ | |
33852a1f | 2145 | nfs_fill_super(s, data); |
08734048 | 2146 | nfs_fscache_get_super_cookie(s, data); |
54ceac45 | 2147 | } |
f7b422b1 | 2148 | |
33852a1f | 2149 | mntroot = nfs_get_root(s, mntfh); |
54ceac45 DH |
2150 | if (IS_ERR(mntroot)) { |
2151 | error = PTR_ERR(mntroot); | |
2152 | goto error_splat_super; | |
f7b422b1 | 2153 | } |
816724e6 | 2154 | |
33852a1f | 2155 | error = security_sb_set_mnt_opts(s, &data->lsm_opts); |
f9c3a380 EP |
2156 | if (error) |
2157 | goto error_splat_root; | |
2158 | ||
54ceac45 DH |
2159 | s->s_flags |= MS_ACTIVE; |
2160 | mnt->mnt_sb = s; | |
2161 | mnt->mnt_root = mntroot; | |
0655960f CL |
2162 | error = 0; |
2163 | ||
2164 | out: | |
33852a1f TM |
2165 | kfree(data->nfs_server.hostname); |
2166 | kfree(data->mount_server.hostname); | |
08734048 | 2167 | kfree(data->fscache_uniq); |
33852a1f TM |
2168 | security_free_mnt_opts(&data->lsm_opts); |
2169 | out_free_fh: | |
2170 | kfree(mntfh); | |
2171 | kfree(data); | |
0655960f | 2172 | return error; |
816724e6 | 2173 | |
54ceac45 DH |
2174 | out_err_nosb: |
2175 | nfs_free_server(server); | |
0655960f | 2176 | goto out; |
54ceac45 | 2177 | |
f9c3a380 EP |
2178 | error_splat_root: |
2179 | dput(mntroot); | |
54ceac45 | 2180 | error_splat_super: |
6f5bbff9 | 2181 | deactivate_locked_super(s); |
0655960f | 2182 | goto out; |
f7b422b1 DH |
2183 | } |
2184 | ||
54ceac45 DH |
2185 | /* |
2186 | * Destroy an NFS2/3 superblock | |
2187 | */ | |
f7b422b1 DH |
2188 | static void nfs_kill_super(struct super_block *s) |
2189 | { | |
2190 | struct nfs_server *server = NFS_SB(s); | |
2191 | ||
fa799759 | 2192 | bdi_unregister(&server->backing_dev_info); |
f7b422b1 | 2193 | kill_anon_super(s); |
08734048 | 2194 | nfs_fscache_release_super_cookie(s); |
54ceac45 | 2195 | nfs_free_server(server); |
f7b422b1 DH |
2196 | } |
2197 | ||
54ceac45 DH |
2198 | /* |
2199 | * Clone an NFS2/3 server record on xdev traversal (FSID-change) | |
2200 | */ | |
2201 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags, | |
2202 | const char *dev_name, void *raw_data, | |
2203 | struct vfsmount *mnt) | |
f7b422b1 DH |
2204 | { |
2205 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
2206 | struct super_block *s; |
2207 | struct nfs_server *server; | |
2208 | struct dentry *mntroot; | |
75180df2 | 2209 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2210 | struct nfs_sb_mountdata sb_mntdata = { |
2211 | .mntflags = flags, | |
2212 | }; | |
54ceac45 | 2213 | int error; |
f7b422b1 | 2214 | |
54ceac45 | 2215 | dprintk("--> nfs_xdev_get_sb()\n"); |
f7b422b1 | 2216 | |
54ceac45 DH |
2217 | /* create a new volume representation */ |
2218 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
2219 | if (IS_ERR(server)) { | |
2220 | error = PTR_ERR(server); | |
2221 | goto out_err_noserver; | |
2222 | } | |
e89a5a43 | 2223 | sb_mntdata.server = server; |
8fa5c000 | 2224 | |
75180df2 TM |
2225 | if (server->flags & NFS_MOUNT_UNSHARED) |
2226 | compare_super = NULL; | |
2227 | ||
54ceac45 | 2228 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 2229 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2230 | if (IS_ERR(s)) { |
2231 | error = PTR_ERR(s); | |
2232 | goto out_err_nosb; | |
2233 | } | |
5006a76c | 2234 | |
54ceac45 DH |
2235 | if (s->s_fs_info != server) { |
2236 | nfs_free_server(server); | |
2237 | server = NULL; | |
fa799759 MS |
2238 | } else { |
2239 | error = nfs_bdi_register(server); | |
2240 | if (error) | |
2241 | goto error_splat_super; | |
f7b422b1 | 2242 | } |
24c8dbbb | 2243 | |
54ceac45 DH |
2244 | if (!s->s_root) { |
2245 | /* initial superblock/root creation */ | |
54ceac45 DH |
2246 | nfs_clone_super(s, data->sb); |
2247 | } | |
f7b422b1 | 2248 | |
54ceac45 DH |
2249 | mntroot = nfs_get_root(s, data->fh); |
2250 | if (IS_ERR(mntroot)) { | |
2251 | error = PTR_ERR(mntroot); | |
2252 | goto error_splat_super; | |
f7b422b1 | 2253 | } |
e9cc6c23 | 2254 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
4c1fe2f7 NB |
2255 | dput(mntroot); |
2256 | error = -ESTALE; | |
2257 | goto error_splat_super; | |
2258 | } | |
f7b422b1 | 2259 | |
54ceac45 DH |
2260 | s->s_flags |= MS_ACTIVE; |
2261 | mnt->mnt_sb = s; | |
2262 | mnt->mnt_root = mntroot; | |
f7b422b1 | 2263 | |
f9c3a380 EP |
2264 | /* clone any lsm security options from the parent to the new sb */ |
2265 | security_sb_clone_mnt_opts(data->sb, s); | |
2266 | ||
54ceac45 DH |
2267 | dprintk("<-- nfs_xdev_get_sb() = 0\n"); |
2268 | return 0; | |
24c8dbbb | 2269 | |
54ceac45 DH |
2270 | out_err_nosb: |
2271 | nfs_free_server(server); | |
2272 | out_err_noserver: | |
2273 | dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error); | |
2274 | return error; | |
f7b422b1 | 2275 | |
54ceac45 | 2276 | error_splat_super: |
6f5bbff9 | 2277 | deactivate_locked_super(s); |
54ceac45 DH |
2278 | dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error); |
2279 | return error; | |
f7b422b1 DH |
2280 | } |
2281 | ||
54ceac45 DH |
2282 | #ifdef CONFIG_NFS_V4 |
2283 | ||
f7b422b1 | 2284 | /* |
54ceac45 | 2285 | * Finish setting up a cloned NFS4 superblock |
f7b422b1 | 2286 | */ |
54ceac45 DH |
2287 | static void nfs4_clone_super(struct super_block *sb, |
2288 | const struct super_block *old_sb) | |
f7b422b1 | 2289 | { |
54ceac45 DH |
2290 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; |
2291 | sb->s_blocksize = old_sb->s_blocksize; | |
2292 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 2293 | sb->s_time_gran = 1; |
54ceac45 DH |
2294 | sb->s_op = old_sb->s_op; |
2295 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
2296 | } |
2297 | ||
54ceac45 DH |
2298 | /* |
2299 | * Set up an NFS4 superblock | |
2300 | */ | |
2301 | static void nfs4_fill_super(struct super_block *sb) | |
f7b422b1 | 2302 | { |
54ceac45 DH |
2303 | sb->s_time_gran = 1; |
2304 | sb->s_op = &nfs4_sops; | |
2305 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
2306 | } |
2307 | ||
01c3f052 TM |
2308 | static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) |
2309 | { | |
2310 | args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3); | |
2311 | } | |
2312 | ||
f0768ebd CL |
2313 | /* |
2314 | * Validate NFSv4 mount options | |
2315 | */ | |
91ea40b9 TT |
2316 | static int nfs4_validate_mount_data(void *options, |
2317 | struct nfs_parsed_mount_data *args, | |
2318 | const char *dev_name) | |
f0768ebd | 2319 | { |
4c568017 | 2320 | struct sockaddr_in *ap; |
91ea40b9 | 2321 | struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; |
f0768ebd CL |
2322 | char *c; |
2323 | ||
2324 | if (data == NULL) | |
2325 | goto out_no_data; | |
2326 | ||
91ea40b9 TT |
2327 | args->rsize = NFS_MAX_FILE_IO_SIZE; |
2328 | args->wsize = NFS_MAX_FILE_IO_SIZE; | |
0e0cab74 CL |
2329 | args->acregmin = NFS_DEF_ACREGMIN; |
2330 | args->acregmax = NFS_DEF_ACREGMAX; | |
2331 | args->acdirmin = NFS_DEF_ACDIRMIN; | |
2332 | args->acdirmax = NFS_DEF_ACDIRMAX; | |
f22d6d79 | 2333 | args->nfs_server.port = NFS_PORT; /* 2049 unless user set port= */ |
6738b251 | 2334 | args->auth_flavors[0] = RPC_AUTH_UNIX; |
059f90b3 | 2335 | args->auth_flavor_len = 1; |
3fd5be9e | 2336 | args->minorversion = 0; |
91ea40b9 | 2337 | |
f0768ebd CL |
2338 | switch (data->version) { |
2339 | case 1: | |
4c568017 CL |
2340 | ap = (struct sockaddr_in *)&args->nfs_server.address; |
2341 | if (data->host_addrlen > sizeof(args->nfs_server.address)) | |
2342 | goto out_no_address; | |
2343 | if (data->host_addrlen == 0) | |
f0768ebd | 2344 | goto out_no_address; |
4c568017 CL |
2345 | args->nfs_server.addrlen = data->host_addrlen; |
2346 | if (copy_from_user(ap, data->host_addr, data->host_addrlen)) | |
f0768ebd | 2347 | return -EFAULT; |
91ea40b9 TT |
2348 | if (!nfs_verify_server_address((struct sockaddr *) |
2349 | &args->nfs_server.address)) | |
f0768ebd CL |
2350 | goto out_no_address; |
2351 | ||
6738b251 CL |
2352 | if (data->auth_flavourlen) { |
2353 | if (data->auth_flavourlen > 1) | |
2354 | goto out_inval_auth; | |
20c71f5e | 2355 | if (copy_from_user(&args->auth_flavors[0], |
91ea40b9 | 2356 | data->auth_flavours, |
20c71f5e | 2357 | sizeof(args->auth_flavors[0]))) |
f0768ebd | 2358 | return -EFAULT; |
f0768ebd CL |
2359 | } |
2360 | ||
2361 | c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); | |
2362 | if (IS_ERR(c)) | |
2363 | return PTR_ERR(c); | |
91ea40b9 | 2364 | args->nfs_server.hostname = c; |
f0768ebd CL |
2365 | |
2366 | c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); | |
2367 | if (IS_ERR(c)) | |
2368 | return PTR_ERR(c); | |
91ea40b9 TT |
2369 | args->nfs_server.export_path = c; |
2370 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); | |
f0768ebd CL |
2371 | |
2372 | c = strndup_user(data->client_addr.data, 16); | |
2373 | if (IS_ERR(c)) | |
2374 | return PTR_ERR(c); | |
91ea40b9 TT |
2375 | args->client_address = c; |
2376 | ||
2377 | /* | |
2378 | * Translate to nfs_parsed_mount_data, which nfs4_fill_super | |
2379 | * can deal with. | |
2380 | */ | |
2381 | ||
2382 | args->flags = data->flags & NFS4_MOUNT_FLAGMASK; | |
2383 | args->rsize = data->rsize; | |
2384 | args->wsize = data->wsize; | |
2385 | args->timeo = data->timeo; | |
2386 | args->retrans = data->retrans; | |
2387 | args->acregmin = data->acregmin; | |
2388 | args->acregmax = data->acregmax; | |
2389 | args->acdirmin = data->acdirmin; | |
2390 | args->acdirmax = data->acdirmax; | |
2391 | args->nfs_server.protocol = data->proto; | |
259875ef | 2392 | nfs_validate_transport_protocol(args); |
f0768ebd CL |
2393 | |
2394 | break; | |
80071225 | 2395 | default: { |
dc045898 | 2396 | int status; |
91ea40b9 TT |
2397 | |
2398 | if (nfs_parse_mount_options((char *)options, args) == 0) | |
80071225 CL |
2399 | return -EINVAL; |
2400 | ||
2401 | if (!nfs_verify_server_address((struct sockaddr *) | |
91ea40b9 | 2402 | &args->nfs_server.address)) |
80071225 | 2403 | return -EINVAL; |
80071225 | 2404 | |
ed596a8a CL |
2405 | nfs_set_port((struct sockaddr *)&args->nfs_server.address, |
2406 | args->nfs_server.port); | |
2407 | ||
259875ef TM |
2408 | nfs_validate_transport_protocol(args); |
2409 | ||
01c3f052 TM |
2410 | nfs4_validate_mount_flags(args); |
2411 | ||
6738b251 | 2412 | if (args->auth_flavor_len > 1) |
80071225 | 2413 | goto out_inval_auth; |
80071225 | 2414 | |
91ea40b9 | 2415 | if (args->client_address == NULL) |
0a87cf12 JL |
2416 | goto out_no_client_address; |
2417 | ||
dc045898 CL |
2418 | status = nfs_parse_devname(dev_name, |
2419 | &args->nfs_server.hostname, | |
2420 | NFS4_MAXNAMLEN, | |
2421 | &args->nfs_server.export_path, | |
2422 | NFS4_MAXPATHLEN); | |
2423 | if (status < 0) | |
2424 | return status; | |
2425 | ||
80071225 CL |
2426 | break; |
2427 | } | |
f0768ebd CL |
2428 | } |
2429 | ||
2430 | return 0; | |
2431 | ||
2432 | out_no_data: | |
2433 | dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); | |
2434 | return -EINVAL; | |
2435 | ||
2436 | out_inval_auth: | |
2437 | dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", | |
2438 | data->auth_flavourlen); | |
2439 | return -EINVAL; | |
2440 | ||
2441 | out_no_address: | |
2442 | dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); | |
2443 | return -EINVAL; | |
0a87cf12 JL |
2444 | |
2445 | out_no_client_address: | |
2446 | dfprintk(MOUNT, "NFS4: mount program didn't pass callback address\n"); | |
2447 | return -EINVAL; | |
f0768ebd CL |
2448 | } |
2449 | ||
54ceac45 | 2450 | /* |
c02d7adf | 2451 | * Get the superblock for the NFS4 root partition |
54ceac45 | 2452 | */ |
c02d7adf | 2453 | static int nfs4_remote_get_sb(struct file_system_type *fs_type, |
816724e6 | 2454 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) |
f7b422b1 | 2455 | { |
c02d7adf | 2456 | struct nfs_parsed_mount_data *data = raw_data; |
54ceac45 DH |
2457 | struct super_block *s; |
2458 | struct nfs_server *server; | |
33852a1f | 2459 | struct nfs_fh *mntfh; |
54ceac45 | 2460 | struct dentry *mntroot; |
75180df2 | 2461 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2462 | struct nfs_sb_mountdata sb_mntdata = { |
2463 | .mntflags = flags, | |
2464 | }; | |
33852a1f TM |
2465 | int error = -ENOMEM; |
2466 | ||
33852a1f TM |
2467 | mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL); |
2468 | if (data == NULL || mntfh == NULL) | |
2469 | goto out_free_fh; | |
f7b422b1 | 2470 | |
33852a1f | 2471 | security_init_mnt_opts(&data->lsm_opts); |
f9c3a380 | 2472 | |
54ceac45 | 2473 | /* Get a volume representation */ |
33852a1f | 2474 | server = nfs4_create_server(data, mntfh); |
54ceac45 DH |
2475 | if (IS_ERR(server)) { |
2476 | error = PTR_ERR(server); | |
29eb981a | 2477 | goto out; |
f7b422b1 | 2478 | } |
e89a5a43 | 2479 | sb_mntdata.server = server; |
f7b422b1 | 2480 | |
75180df2 TM |
2481 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2482 | compare_super = NULL; | |
2483 | ||
54ceac45 | 2484 | /* Get a superblock - note that we may end up sharing one that already exists */ |
c02d7adf | 2485 | s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
2486 | if (IS_ERR(s)) { |
2487 | error = PTR_ERR(s); | |
f7b422b1 | 2488 | goto out_free; |
816724e6 TM |
2489 | } |
2490 | ||
5dd3177a TM |
2491 | if (s->s_fs_info != server) { |
2492 | nfs_free_server(server); | |
2493 | server = NULL; | |
fa799759 MS |
2494 | } else { |
2495 | error = nfs_bdi_register(server); | |
2496 | if (error) | |
2497 | goto error_splat_super; | |
5dd3177a TM |
2498 | } |
2499 | ||
54ceac45 DH |
2500 | if (!s->s_root) { |
2501 | /* initial superblock/root creation */ | |
54ceac45 | 2502 | nfs4_fill_super(s); |
08734048 | 2503 | nfs_fscache_get_super_cookie(s, data); |
54ceac45 | 2504 | } |
f7b422b1 | 2505 | |
33852a1f | 2506 | mntroot = nfs4_get_root(s, mntfh); |
54ceac45 DH |
2507 | if (IS_ERR(mntroot)) { |
2508 | error = PTR_ERR(mntroot); | |
2509 | goto error_splat_super; | |
f7b422b1 | 2510 | } |
54ceac45 | 2511 | |
33852a1f | 2512 | error = security_sb_set_mnt_opts(s, &data->lsm_opts); |
46c8ac74 EP |
2513 | if (error) |
2514 | goto error_splat_root; | |
2515 | ||
f7b422b1 | 2516 | s->s_flags |= MS_ACTIVE; |
54ceac45 DH |
2517 | mnt->mnt_sb = s; |
2518 | mnt->mnt_root = mntroot; | |
29eb981a CL |
2519 | error = 0; |
2520 | ||
2521 | out: | |
33852a1f TM |
2522 | security_free_mnt_opts(&data->lsm_opts); |
2523 | out_free_fh: | |
2524 | kfree(mntfh); | |
29eb981a | 2525 | return error; |
54ceac45 | 2526 | |
f7b422b1 | 2527 | out_free: |
54ceac45 | 2528 | nfs_free_server(server); |
29eb981a | 2529 | goto out; |
54ceac45 | 2530 | |
46c8ac74 EP |
2531 | error_splat_root: |
2532 | dput(mntroot); | |
54ceac45 | 2533 | error_splat_super: |
6f5bbff9 | 2534 | deactivate_locked_super(s); |
29eb981a | 2535 | goto out; |
f7b422b1 DH |
2536 | } |
2537 | ||
c02d7adf TM |
2538 | static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type, |
2539 | int flags, void *data, const char *hostname) | |
2540 | { | |
2541 | struct vfsmount *root_mnt; | |
2542 | char *root_devname; | |
2543 | size_t len; | |
2544 | ||
2545 | len = strlen(hostname) + 3; | |
2546 | root_devname = kmalloc(len, GFP_KERNEL); | |
2547 | if (root_devname == NULL) | |
2548 | return ERR_PTR(-ENOMEM); | |
2549 | snprintf(root_devname, len, "%s:/", hostname); | |
2550 | root_mnt = vfs_kern_mount(fs_type, flags, root_devname, data); | |
2551 | kfree(root_devname); | |
2552 | return root_mnt; | |
2553 | } | |
2554 | ||
b88f8a54 TM |
2555 | static void nfs_fix_devname(const struct path *path, struct vfsmount *mnt) |
2556 | { | |
2557 | char *page = (char *) __get_free_page(GFP_KERNEL); | |
2558 | char *devname, *tmp; | |
2559 | ||
2560 | if (page == NULL) | |
2561 | return; | |
2562 | devname = nfs_path(path->mnt->mnt_devname, | |
2563 | path->mnt->mnt_root, path->dentry, | |
2564 | page, PAGE_SIZE); | |
2565 | if (devname == NULL) | |
2566 | goto out_freepage; | |
2567 | tmp = kstrdup(devname, GFP_KERNEL); | |
2568 | if (tmp == NULL) | |
2569 | goto out_freepage; | |
2570 | kfree(mnt->mnt_devname); | |
2571 | mnt->mnt_devname = tmp; | |
2572 | out_freepage: | |
2573 | free_page((unsigned long)page); | |
2574 | } | |
2575 | ||
c02d7adf TM |
2576 | static int nfs_follow_remote_path(struct vfsmount *root_mnt, |
2577 | const char *export_path, struct vfsmount *mnt_target) | |
2578 | { | |
2579 | struct mnt_namespace *ns_private; | |
2580 | struct nameidata nd; | |
2581 | struct super_block *s; | |
2582 | int ret; | |
2583 | ||
2584 | ns_private = create_mnt_ns(root_mnt); | |
2585 | ret = PTR_ERR(ns_private); | |
2586 | if (IS_ERR(ns_private)) | |
2587 | goto out_mntput; | |
2588 | ||
2589 | ret = vfs_path_lookup(root_mnt->mnt_root, root_mnt, | |
2590 | export_path, LOOKUP_FOLLOW, &nd); | |
2591 | ||
2592 | put_mnt_ns(ns_private); | |
2593 | ||
2594 | if (ret != 0) | |
2595 | goto out_err; | |
2596 | ||
2597 | s = nd.path.mnt->mnt_sb; | |
2598 | atomic_inc(&s->s_active); | |
2599 | mnt_target->mnt_sb = s; | |
2600 | mnt_target->mnt_root = dget(nd.path.dentry); | |
2601 | ||
b88f8a54 TM |
2602 | /* Correct the device pathname */ |
2603 | nfs_fix_devname(&nd.path, mnt_target); | |
2604 | ||
c02d7adf TM |
2605 | path_put(&nd.path); |
2606 | down_write(&s->s_umount); | |
2607 | return 0; | |
2608 | out_mntput: | |
2609 | mntput(root_mnt); | |
2610 | out_err: | |
2611 | return ret; | |
2612 | } | |
2613 | ||
2614 | /* | |
2615 | * Get the superblock for an NFS4 mountpoint | |
2616 | */ | |
2617 | static int nfs4_get_sb(struct file_system_type *fs_type, | |
2618 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
2619 | { | |
2620 | struct nfs_parsed_mount_data *data; | |
2621 | char *export_path; | |
2622 | struct vfsmount *root_mnt; | |
2623 | int error = -ENOMEM; | |
2624 | ||
2625 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2626 | if (data == NULL) | |
2627 | goto out_free_data; | |
2628 | ||
2629 | /* Validate the mount data */ | |
2630 | error = nfs4_validate_mount_data(raw_data, data, dev_name); | |
2631 | if (error < 0) | |
2632 | goto out; | |
2633 | ||
2634 | export_path = data->nfs_server.export_path; | |
2635 | data->nfs_server.export_path = "/"; | |
2636 | root_mnt = nfs_do_root_mount(&nfs4_remote_fs_type, flags, data, | |
2637 | data->nfs_server.hostname); | |
2638 | data->nfs_server.export_path = export_path; | |
2639 | ||
2640 | error = PTR_ERR(root_mnt); | |
2641 | if (IS_ERR(root_mnt)) | |
2642 | goto out; | |
2643 | ||
2644 | error = nfs_follow_remote_path(root_mnt, export_path, mnt); | |
2645 | ||
2646 | out: | |
2647 | kfree(data->client_address); | |
2648 | kfree(data->nfs_server.export_path); | |
2649 | kfree(data->nfs_server.hostname); | |
2650 | kfree(data->fscache_uniq); | |
2651 | out_free_data: | |
2652 | kfree(data); | |
2653 | dprintk("<-- nfs4_get_sb() = %d%s\n", error, | |
2654 | error != 0 ? " [error]" : ""); | |
2655 | return error; | |
2656 | } | |
2657 | ||
f7b422b1 DH |
2658 | static void nfs4_kill_super(struct super_block *sb) |
2659 | { | |
2660 | struct nfs_server *server = NFS_SB(sb); | |
2661 | ||
0f3e66c6 | 2662 | dprintk("--> %s\n", __func__); |
515d8611 | 2663 | nfs_super_return_all_delegations(sb); |
f7b422b1 | 2664 | kill_anon_super(sb); |
f7b422b1 | 2665 | nfs4_renewd_prepare_shutdown(server); |
08734048 | 2666 | nfs_fscache_release_super_cookie(sb); |
54ceac45 | 2667 | nfs_free_server(server); |
0f3e66c6 | 2668 | dprintk("<-- %s\n", __func__); |
f7b422b1 DH |
2669 | } |
2670 | ||
2671 | /* | |
54ceac45 | 2672 | * Clone an NFS4 server record on xdev traversal (FSID-change) |
f7b422b1 | 2673 | */ |
54ceac45 DH |
2674 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags, |
2675 | const char *dev_name, void *raw_data, | |
2676 | struct vfsmount *mnt) | |
f7b422b1 | 2677 | { |
54ceac45 DH |
2678 | struct nfs_clone_mount *data = raw_data; |
2679 | struct super_block *s; | |
2680 | struct nfs_server *server; | |
2681 | struct dentry *mntroot; | |
75180df2 | 2682 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2683 | struct nfs_sb_mountdata sb_mntdata = { |
2684 | .mntflags = flags, | |
2685 | }; | |
54ceac45 | 2686 | int error; |
f7b422b1 | 2687 | |
54ceac45 | 2688 | dprintk("--> nfs4_xdev_get_sb()\n"); |
f7b422b1 | 2689 | |
54ceac45 DH |
2690 | /* create a new volume representation */ |
2691 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
2692 | if (IS_ERR(server)) { | |
2693 | error = PTR_ERR(server); | |
2694 | goto out_err_noserver; | |
f7b422b1 | 2695 | } |
e89a5a43 | 2696 | sb_mntdata.server = server; |
f7b422b1 | 2697 | |
75180df2 TM |
2698 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2699 | compare_super = NULL; | |
2700 | ||
54ceac45 | 2701 | /* Get a superblock - note that we may end up sharing one that already exists */ |
ec9a05c9 | 2702 | s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2703 | if (IS_ERR(s)) { |
2704 | error = PTR_ERR(s); | |
2705 | goto out_err_nosb; | |
f7b422b1 | 2706 | } |
f7b422b1 | 2707 | |
54ceac45 DH |
2708 | if (s->s_fs_info != server) { |
2709 | nfs_free_server(server); | |
2710 | server = NULL; | |
fa799759 MS |
2711 | } else { |
2712 | error = nfs_bdi_register(server); | |
2713 | if (error) | |
2714 | goto error_splat_super; | |
54ceac45 | 2715 | } |
f7b422b1 | 2716 | |
54ceac45 DH |
2717 | if (!s->s_root) { |
2718 | /* initial superblock/root creation */ | |
54ceac45 DH |
2719 | nfs4_clone_super(s, data->sb); |
2720 | } | |
f7b422b1 | 2721 | |
54ceac45 DH |
2722 | mntroot = nfs4_get_root(s, data->fh); |
2723 | if (IS_ERR(mntroot)) { | |
2724 | error = PTR_ERR(mntroot); | |
2725 | goto error_splat_super; | |
2726 | } | |
e9cc6c23 TM |
2727 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
2728 | dput(mntroot); | |
2729 | error = -ESTALE; | |
2730 | goto error_splat_super; | |
2731 | } | |
f7b422b1 | 2732 | |
54ceac45 DH |
2733 | s->s_flags |= MS_ACTIVE; |
2734 | mnt->mnt_sb = s; | |
2735 | mnt->mnt_root = mntroot; | |
2736 | ||
46c8ac74 EP |
2737 | security_sb_clone_mnt_opts(data->sb, s); |
2738 | ||
54ceac45 DH |
2739 | dprintk("<-- nfs4_xdev_get_sb() = 0\n"); |
2740 | return 0; | |
2741 | ||
2742 | out_err_nosb: | |
2743 | nfs_free_server(server); | |
2744 | out_err_noserver: | |
2745 | dprintk("<-- nfs4_xdev_get_sb() = %d [error]\n", error); | |
2746 | return error; | |
2747 | ||
2748 | error_splat_super: | |
6f5bbff9 | 2749 | deactivate_locked_super(s); |
54ceac45 DH |
2750 | dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error); |
2751 | return error; | |
f7b422b1 DH |
2752 | } |
2753 | ||
c02d7adf TM |
2754 | static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type, |
2755 | int flags, const char *dev_name, void *raw_data, | |
2756 | struct vfsmount *mnt) | |
f7b422b1 DH |
2757 | { |
2758 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
2759 | struct super_block *s; |
2760 | struct nfs_server *server; | |
2761 | struct dentry *mntroot; | |
2762 | struct nfs_fh mntfh; | |
75180df2 | 2763 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2764 | struct nfs_sb_mountdata sb_mntdata = { |
2765 | .mntflags = flags, | |
2766 | }; | |
54ceac45 DH |
2767 | int error; |
2768 | ||
2769 | dprintk("--> nfs4_referral_get_sb()\n"); | |
2770 | ||
2771 | /* create a new volume representation */ | |
2772 | server = nfs4_create_referral_server(data, &mntfh); | |
2773 | if (IS_ERR(server)) { | |
2774 | error = PTR_ERR(server); | |
2775 | goto out_err_noserver; | |
2776 | } | |
e89a5a43 | 2777 | sb_mntdata.server = server; |
54ceac45 | 2778 | |
75180df2 TM |
2779 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2780 | compare_super = NULL; | |
2781 | ||
54ceac45 | 2782 | /* Get a superblock - note that we may end up sharing one that already exists */ |
ec9a05c9 | 2783 | s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2784 | if (IS_ERR(s)) { |
2785 | error = PTR_ERR(s); | |
2786 | goto out_err_nosb; | |
2787 | } | |
2788 | ||
2789 | if (s->s_fs_info != server) { | |
2790 | nfs_free_server(server); | |
2791 | server = NULL; | |
fa799759 MS |
2792 | } else { |
2793 | error = nfs_bdi_register(server); | |
2794 | if (error) | |
2795 | goto error_splat_super; | |
54ceac45 DH |
2796 | } |
2797 | ||
2798 | if (!s->s_root) { | |
2799 | /* initial superblock/root creation */ | |
54ceac45 DH |
2800 | nfs4_fill_super(s); |
2801 | } | |
2802 | ||
f2d0d85e | 2803 | mntroot = nfs4_get_root(s, &mntfh); |
54ceac45 DH |
2804 | if (IS_ERR(mntroot)) { |
2805 | error = PTR_ERR(mntroot); | |
2806 | goto error_splat_super; | |
2807 | } | |
e9cc6c23 TM |
2808 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
2809 | dput(mntroot); | |
2810 | error = -ESTALE; | |
2811 | goto error_splat_super; | |
2812 | } | |
54ceac45 DH |
2813 | |
2814 | s->s_flags |= MS_ACTIVE; | |
2815 | mnt->mnt_sb = s; | |
2816 | mnt->mnt_root = mntroot; | |
2817 | ||
46c8ac74 EP |
2818 | security_sb_clone_mnt_opts(data->sb, s); |
2819 | ||
54ceac45 DH |
2820 | dprintk("<-- nfs4_referral_get_sb() = 0\n"); |
2821 | return 0; | |
2822 | ||
2823 | out_err_nosb: | |
2824 | nfs_free_server(server); | |
2825 | out_err_noserver: | |
2826 | dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error); | |
2827 | return error; | |
2828 | ||
2829 | error_splat_super: | |
6f5bbff9 | 2830 | deactivate_locked_super(s); |
54ceac45 DH |
2831 | dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error); |
2832 | return error; | |
f7b422b1 DH |
2833 | } |
2834 | ||
c02d7adf TM |
2835 | /* |
2836 | * Create an NFS4 server record on referral traversal | |
2837 | */ | |
2838 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, | |
2839 | int flags, const char *dev_name, void *raw_data, | |
2840 | struct vfsmount *mnt) | |
2841 | { | |
2842 | struct nfs_clone_mount *data = raw_data; | |
2843 | char *export_path; | |
2844 | struct vfsmount *root_mnt; | |
2845 | int error; | |
2846 | ||
2847 | dprintk("--> nfs4_referral_get_sb()\n"); | |
2848 | ||
2849 | export_path = data->mnt_path; | |
2850 | data->mnt_path = "/"; | |
2851 | ||
2852 | root_mnt = nfs_do_root_mount(&nfs4_remote_referral_fs_type, | |
2853 | flags, data, data->hostname); | |
2854 | data->mnt_path = export_path; | |
2855 | ||
2856 | error = PTR_ERR(root_mnt); | |
2857 | if (IS_ERR(root_mnt)) | |
2858 | goto out; | |
2859 | ||
2860 | error = nfs_follow_remote_path(root_mnt, export_path, mnt); | |
2861 | out: | |
2862 | dprintk("<-- nfs4_referral_get_sb() = %d%s\n", error, | |
2863 | error != 0 ? " [error]" : ""); | |
2864 | return error; | |
2865 | } | |
2866 | ||
54ceac45 | 2867 | #endif /* CONFIG_NFS_V4 */ |