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Commit | Line | Data |
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f7b422b1 DH |
1 | /* |
2 | * linux/fs/nfs/super.c | |
3 | * | |
4 | * Copyright (C) 1992 Rick Sladkey | |
5 | * | |
6 | * nfs superblock handling functions | |
7 | * | |
526719ba | 8 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
f7b422b1 DH |
9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
10 | * | |
11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
12 | * J.S.Peatfield@damtp.cam.ac.uk | |
13 | * | |
14 | * Split from inode.c by David Howells <dhowells@redhat.com> | |
15 | * | |
54ceac45 DH |
16 | * - superblocks are indexed on server only - all inodes, dentries, etc. associated with a |
17 | * particular server are held in the same superblock | |
18 | * - NFS superblocks can have several effective roots to the dentry tree | |
19 | * - directory type roots are spliced into the tree when a path from one root reaches the root | |
20 | * of another (see nfs_lookup()) | |
f7b422b1 DH |
21 | */ |
22 | ||
f7b422b1 DH |
23 | #include <linux/module.h> |
24 | #include <linux/init.h> | |
25 | ||
26 | #include <linux/time.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/string.h> | |
30 | #include <linux/stat.h> | |
31 | #include <linux/errno.h> | |
32 | #include <linux/unistd.h> | |
33 | #include <linux/sunrpc/clnt.h> | |
34 | #include <linux/sunrpc/stats.h> | |
35 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 36 | #include <linux/sunrpc/xprtsock.h> |
2cf7ff7a | 37 | #include <linux/sunrpc/xprtrdma.h> |
f7b422b1 DH |
38 | #include <linux/nfs_fs.h> |
39 | #include <linux/nfs_mount.h> | |
40 | #include <linux/nfs4_mount.h> | |
41 | #include <linux/lockd/bind.h> | |
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 | |
7630c852 CL |
275 | static int nfs4_validate_text_mount_data(void *options, |
276 | struct nfs_parsed_mount_data *args, const char *dev_name); | |
a6fe23be CL |
277 | static int nfs4_try_mount(int flags, const char *dev_name, |
278 | struct nfs_parsed_mount_data *data, struct vfsmount *mnt); | |
816724e6 TM |
279 | static int nfs4_get_sb(struct file_system_type *fs_type, |
280 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
c02d7adf TM |
281 | static int nfs4_remote_get_sb(struct file_system_type *fs_type, |
282 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
54ceac45 DH |
283 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, |
284 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
285 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, | |
286 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
c02d7adf TM |
287 | static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type, |
288 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
f7b422b1 DH |
289 | static void nfs4_kill_super(struct super_block *sb); |
290 | ||
291 | static struct file_system_type nfs4_fs_type = { | |
292 | .owner = THIS_MODULE, | |
293 | .name = "nfs4", | |
294 | .get_sb = nfs4_get_sb, | |
295 | .kill_sb = nfs4_kill_super, | |
349457cc | 296 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
297 | }; |
298 | ||
c02d7adf TM |
299 | static struct file_system_type nfs4_remote_fs_type = { |
300 | .owner = THIS_MODULE, | |
301 | .name = "nfs4", | |
302 | .get_sb = nfs4_remote_get_sb, | |
303 | .kill_sb = nfs4_kill_super, | |
304 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, | |
305 | }; | |
306 | ||
54ceac45 | 307 | struct file_system_type nfs4_xdev_fs_type = { |
f7b422b1 DH |
308 | .owner = THIS_MODULE, |
309 | .name = "nfs4", | |
54ceac45 | 310 | .get_sb = nfs4_xdev_get_sb, |
f7b422b1 | 311 | .kill_sb = nfs4_kill_super, |
349457cc | 312 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
313 | }; |
314 | ||
c02d7adf TM |
315 | static struct file_system_type nfs4_remote_referral_fs_type = { |
316 | .owner = THIS_MODULE, | |
317 | .name = "nfs4", | |
318 | .get_sb = nfs4_remote_referral_get_sb, | |
319 | .kill_sb = nfs4_kill_super, | |
320 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, | |
321 | }; | |
322 | ||
54ceac45 | 323 | struct file_system_type nfs4_referral_fs_type = { |
f7b422b1 DH |
324 | .owner = THIS_MODULE, |
325 | .name = "nfs4", | |
54ceac45 | 326 | .get_sb = nfs4_referral_get_sb, |
f7b422b1 | 327 | .kill_sb = nfs4_kill_super, |
349457cc | 328 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
329 | }; |
330 | ||
ee9b6d61 | 331 | static const struct super_operations nfs4_sops = { |
f7b422b1 DH |
332 | .alloc_inode = nfs_alloc_inode, |
333 | .destroy_inode = nfs_destroy_inode, | |
334 | .write_inode = nfs_write_inode, | |
335 | .statfs = nfs_statfs, | |
336 | .clear_inode = nfs4_clear_inode, | |
337 | .umount_begin = nfs_umount_begin, | |
338 | .show_options = nfs_show_options, | |
339 | .show_stats = nfs_show_stats, | |
48b605f8 | 340 | .remount_fs = nfs_remount, |
f7b422b1 DH |
341 | }; |
342 | #endif | |
343 | ||
8e1f936b RR |
344 | static struct shrinker acl_shrinker = { |
345 | .shrink = nfs_access_cache_shrinker, | |
346 | .seeks = DEFAULT_SEEKS, | |
347 | }; | |
979df72e | 348 | |
f7b422b1 DH |
349 | /* |
350 | * Register the NFS filesystems | |
351 | */ | |
352 | int __init register_nfs_fs(void) | |
353 | { | |
354 | int ret; | |
355 | ||
356 | ret = register_filesystem(&nfs_fs_type); | |
357 | if (ret < 0) | |
358 | goto error_0; | |
359 | ||
f7b422b1 DH |
360 | ret = nfs_register_sysctl(); |
361 | if (ret < 0) | |
362 | goto error_1; | |
89a09141 | 363 | #ifdef CONFIG_NFS_V4 |
f7b422b1 DH |
364 | ret = register_filesystem(&nfs4_fs_type); |
365 | if (ret < 0) | |
366 | goto error_2; | |
367 | #endif | |
8e1f936b | 368 | register_shrinker(&acl_shrinker); |
f7b422b1 DH |
369 | return 0; |
370 | ||
371 | #ifdef CONFIG_NFS_V4 | |
372 | error_2: | |
373 | nfs_unregister_sysctl(); | |
89a09141 | 374 | #endif |
f7b422b1 DH |
375 | error_1: |
376 | unregister_filesystem(&nfs_fs_type); | |
f7b422b1 DH |
377 | error_0: |
378 | return ret; | |
379 | } | |
380 | ||
381 | /* | |
382 | * Unregister the NFS filesystems | |
383 | */ | |
384 | void __exit unregister_nfs_fs(void) | |
385 | { | |
8e1f936b | 386 | unregister_shrinker(&acl_shrinker); |
f7b422b1 DH |
387 | #ifdef CONFIG_NFS_V4 |
388 | unregister_filesystem(&nfs4_fs_type); | |
f7b422b1 | 389 | #endif |
49af7ee1 | 390 | nfs_unregister_sysctl(); |
f7b422b1 DH |
391 | unregister_filesystem(&nfs_fs_type); |
392 | } | |
393 | ||
1daef0a8 | 394 | void nfs_sb_active(struct super_block *sb) |
ef818a28 | 395 | { |
1daef0a8 | 396 | struct nfs_server *server = NFS_SB(sb); |
ef818a28 | 397 | |
1daef0a8 TM |
398 | if (atomic_inc_return(&server->active) == 1) |
399 | atomic_inc(&sb->s_active); | |
ef818a28 SD |
400 | } |
401 | ||
1daef0a8 | 402 | void nfs_sb_deactive(struct super_block *sb) |
ef818a28 SD |
403 | { |
404 | struct nfs_server *server = NFS_SB(sb); | |
1daef0a8 TM |
405 | |
406 | if (atomic_dec_and_test(&server->active)) | |
407 | deactivate_super(sb); | |
ef818a28 SD |
408 | } |
409 | ||
f7b422b1 DH |
410 | /* |
411 | * Deliver file system statistics to userspace | |
412 | */ | |
816724e6 | 413 | static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
f7b422b1 | 414 | { |
0c7d90cf | 415 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
f7b422b1 DH |
416 | unsigned char blockbits; |
417 | unsigned long blockres; | |
0c7d90cf | 418 | struct nfs_fh *fh = NFS_FH(dentry->d_inode); |
f7b422b1 DH |
419 | struct nfs_fattr fattr; |
420 | struct nfs_fsstat res = { | |
421 | .fattr = &fattr, | |
422 | }; | |
423 | int error; | |
424 | ||
8fa5c000 | 425 | error = server->nfs_client->rpc_ops->statfs(server, fh, &res); |
f7b422b1 DH |
426 | if (error < 0) |
427 | goto out_err; | |
1a0ba9ae | 428 | buf->f_type = NFS_SUPER_MAGIC; |
f7b422b1 DH |
429 | |
430 | /* | |
431 | * Current versions of glibc do not correctly handle the | |
432 | * case where f_frsize != f_bsize. Eventually we want to | |
433 | * report the value of wtmult in this field. | |
434 | */ | |
0c7d90cf | 435 | buf->f_frsize = dentry->d_sb->s_blocksize; |
f7b422b1 DH |
436 | |
437 | /* | |
438 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
439 | * are reported in units of f_frsize. Linux hasn't had | |
440 | * an f_frsize field in its statfs struct until recently, | |
441 | * thus historically Linux's sys_statfs reports these | |
442 | * fields in units of f_bsize. | |
443 | */ | |
0c7d90cf DH |
444 | buf->f_bsize = dentry->d_sb->s_blocksize; |
445 | blockbits = dentry->d_sb->s_blocksize_bits; | |
f7b422b1 DH |
446 | blockres = (1 << blockbits) - 1; |
447 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
448 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
449 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
450 | ||
451 | buf->f_files = res.tfiles; | |
452 | buf->f_ffree = res.afiles; | |
453 | ||
454 | buf->f_namelen = server->namelen; | |
1a0ba9ae | 455 | |
f7b422b1 DH |
456 | return 0; |
457 | ||
458 | out_err: | |
3110ff80 | 459 | dprintk("%s: statfs error = %d\n", __func__, -error); |
1a0ba9ae | 460 | return error; |
f7b422b1 DH |
461 | } |
462 | ||
7d4e2747 DH |
463 | /* |
464 | * Map the security flavour number to a name | |
465 | */ | |
81039f1f TM |
466 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
467 | { | |
7d4e2747 | 468 | static const struct { |
81039f1f TM |
469 | rpc_authflavor_t flavour; |
470 | const char *str; | |
471 | } sec_flavours[] = { | |
472 | { RPC_AUTH_NULL, "null" }, | |
473 | { RPC_AUTH_UNIX, "sys" }, | |
474 | { RPC_AUTH_GSS_KRB5, "krb5" }, | |
475 | { RPC_AUTH_GSS_KRB5I, "krb5i" }, | |
476 | { RPC_AUTH_GSS_KRB5P, "krb5p" }, | |
477 | { RPC_AUTH_GSS_LKEY, "lkey" }, | |
478 | { RPC_AUTH_GSS_LKEYI, "lkeyi" }, | |
479 | { RPC_AUTH_GSS_LKEYP, "lkeyp" }, | |
480 | { RPC_AUTH_GSS_SPKM, "spkm" }, | |
481 | { RPC_AUTH_GSS_SPKMI, "spkmi" }, | |
482 | { RPC_AUTH_GSS_SPKMP, "spkmp" }, | |
4d81cd16 | 483 | { UINT_MAX, "unknown" } |
81039f1f TM |
484 | }; |
485 | int i; | |
486 | ||
4d81cd16 | 487 | for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) { |
81039f1f TM |
488 | if (sec_flavours[i].flavour == flavour) |
489 | break; | |
490 | } | |
491 | return sec_flavours[i].str; | |
492 | } | |
493 | ||
82d101d5 CL |
494 | static void nfs_show_mountd_options(struct seq_file *m, struct nfs_server *nfss, |
495 | int showdefaults) | |
496 | { | |
497 | struct sockaddr *sap = (struct sockaddr *)&nfss->mountd_address; | |
498 | ||
499 | switch (sap->sa_family) { | |
500 | case AF_INET: { | |
501 | struct sockaddr_in *sin = (struct sockaddr_in *)sap; | |
be859405 | 502 | seq_printf(m, ",mountaddr=%pI4", &sin->sin_addr.s_addr); |
82d101d5 CL |
503 | break; |
504 | } | |
505 | case AF_INET6: { | |
506 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
5b095d98 | 507 | seq_printf(m, ",mountaddr=%pI6", &sin6->sin6_addr); |
82d101d5 CL |
508 | break; |
509 | } | |
510 | default: | |
511 | if (showdefaults) | |
512 | seq_printf(m, ",mountaddr=unspecified"); | |
513 | } | |
514 | ||
515 | if (nfss->mountd_version || showdefaults) | |
516 | seq_printf(m, ",mountvers=%u", nfss->mountd_version); | |
517 | if (nfss->mountd_port || showdefaults) | |
518 | seq_printf(m, ",mountport=%u", nfss->mountd_port); | |
519 | ||
520 | switch (nfss->mountd_protocol) { | |
521 | case IPPROTO_UDP: | |
522 | seq_printf(m, ",mountproto=udp"); | |
523 | break; | |
524 | case IPPROTO_TCP: | |
525 | seq_printf(m, ",mountproto=tcp"); | |
526 | break; | |
527 | default: | |
528 | if (showdefaults) | |
529 | seq_printf(m, ",mountproto=auto"); | |
530 | } | |
531 | } | |
532 | ||
f7b422b1 DH |
533 | /* |
534 | * Describe the mount options in force on this server representation | |
535 | */ | |
82d101d5 CL |
536 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, |
537 | int showdefaults) | |
f7b422b1 | 538 | { |
509de811 | 539 | static const struct proc_nfs_info { |
f7b422b1 | 540 | int flag; |
509de811 DH |
541 | const char *str; |
542 | const char *nostr; | |
f7b422b1 DH |
543 | } nfs_info[] = { |
544 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, | |
82d101d5 | 545 | { NFS_MOUNT_POSIX, ",posix", "" }, |
f7b422b1 DH |
546 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
547 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
548 | { NFS_MOUNT_NONLM, ",nolock", "" }, | |
549 | { NFS_MOUNT_NOACL, ",noacl", "" }, | |
74dd34e6 | 550 | { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" }, |
d740351b CL |
551 | { NFS_MOUNT_UNSHARED, ",nosharecache", "" }, |
552 | { NFS_MOUNT_NORESVPORT, ",noresvport", "" }, | |
f7b422b1 DH |
553 | { 0, NULL, NULL } |
554 | }; | |
509de811 | 555 | const struct proc_nfs_info *nfs_infop; |
8fa5c000 | 556 | struct nfs_client *clp = nfss->nfs_client; |
82d101d5 | 557 | u32 version = clp->rpc_ops->version; |
f7b422b1 | 558 | |
82d101d5 | 559 | seq_printf(m, ",vers=%u", version); |
2d767432 CL |
560 | seq_printf(m, ",rsize=%u", nfss->rsize); |
561 | seq_printf(m, ",wsize=%u", nfss->wsize); | |
82d101d5 CL |
562 | if (nfss->bsize != 0) |
563 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
564 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
0e0cab74 | 565 | if (nfss->acregmin != NFS_DEF_ACREGMIN*HZ || showdefaults) |
2d767432 | 566 | seq_printf(m, ",acregmin=%u", nfss->acregmin/HZ); |
0e0cab74 | 567 | if (nfss->acregmax != NFS_DEF_ACREGMAX*HZ || showdefaults) |
2d767432 | 568 | seq_printf(m, ",acregmax=%u", nfss->acregmax/HZ); |
0e0cab74 | 569 | if (nfss->acdirmin != NFS_DEF_ACDIRMIN*HZ || showdefaults) |
2d767432 | 570 | seq_printf(m, ",acdirmin=%u", nfss->acdirmin/HZ); |
0e0cab74 | 571 | if (nfss->acdirmax != NFS_DEF_ACDIRMAX*HZ || showdefaults) |
2d767432 | 572 | seq_printf(m, ",acdirmax=%u", nfss->acdirmax/HZ); |
f7b422b1 DH |
573 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { |
574 | if (nfss->flags & nfs_infop->flag) | |
575 | seq_puts(m, nfs_infop->str); | |
576 | else | |
577 | seq_puts(m, nfs_infop->nostr); | |
578 | } | |
56928edd TT |
579 | seq_printf(m, ",proto=%s", |
580 | rpc_peeraddr2str(nfss->client, RPC_DISPLAY_PROTO)); | |
82d101d5 CL |
581 | if (version == 4) { |
582 | if (nfss->port != NFS_PORT) | |
583 | seq_printf(m, ",port=%u", nfss->port); | |
584 | } else | |
585 | if (nfss->port) | |
586 | seq_printf(m, ",port=%u", nfss->port); | |
587 | ||
33170233 TM |
588 | seq_printf(m, ",timeo=%lu", 10U * nfss->client->cl_timeout->to_initval / HZ); |
589 | seq_printf(m, ",retrans=%u", nfss->client->cl_timeout->to_retries); | |
81039f1f | 590 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
82d101d5 CL |
591 | |
592 | if (version != 4) | |
593 | nfs_show_mountd_options(m, nfss, showdefaults); | |
594 | ||
595 | #ifdef CONFIG_NFS_V4 | |
596 | if (clp->rpc_ops->version == 4) | |
597 | seq_printf(m, ",clientaddr=%s", clp->cl_ipaddr); | |
598 | #endif | |
b797cac7 DH |
599 | if (nfss->options & NFS_OPTION_FSCACHE) |
600 | seq_printf(m, ",fsc"); | |
f7b422b1 DH |
601 | } |
602 | ||
603 | /* | |
604 | * Describe the mount options on this VFS mountpoint | |
605 | */ | |
606 | static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) | |
607 | { | |
608 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
609 | ||
610 | nfs_show_mount_options(m, nfss, 0); | |
611 | ||
5d8515ca CL |
612 | seq_printf(m, ",addr=%s", |
613 | rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient, | |
614 | RPC_DISPLAY_ADDR)); | |
f7b422b1 DH |
615 | |
616 | return 0; | |
617 | } | |
618 | ||
619 | /* | |
620 | * Present statistical information for this VFS mountpoint | |
621 | */ | |
622 | static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) | |
623 | { | |
624 | int i, cpu; | |
625 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
626 | struct rpc_auth *auth = nfss->client->cl_auth; | |
627 | struct nfs_iostats totals = { }; | |
628 | ||
629 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
630 | ||
631 | /* | |
632 | * Display all mount option settings | |
633 | */ | |
634 | seq_printf(m, "\n\topts:\t"); | |
635 | seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw"); | |
636 | seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); | |
637 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : ""); | |
638 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); | |
639 | nfs_show_mount_options(m, nfss, 1); | |
640 | ||
641 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); | |
642 | ||
643 | seq_printf(m, "\n\tcaps:\t"); | |
644 | seq_printf(m, "caps=0x%x", nfss->caps); | |
2d767432 CL |
645 | seq_printf(m, ",wtmult=%u", nfss->wtmult); |
646 | seq_printf(m, ",dtsize=%u", nfss->dtsize); | |
647 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
648 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
f7b422b1 DH |
649 | |
650 | #ifdef CONFIG_NFS_V4 | |
40c55319 | 651 | if (nfss->nfs_client->rpc_ops->version == 4) { |
f7b422b1 DH |
652 | seq_printf(m, "\n\tnfsv4:\t"); |
653 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); | |
654 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
655 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); | |
656 | } | |
657 | #endif | |
658 | ||
659 | /* | |
660 | * Display security flavor in effect for this mount | |
661 | */ | |
2d767432 | 662 | seq_printf(m, "\n\tsec:\tflavor=%u", auth->au_ops->au_flavor); |
f7b422b1 | 663 | if (auth->au_flavor) |
2d767432 | 664 | seq_printf(m, ",pseudoflavor=%u", auth->au_flavor); |
f7b422b1 DH |
665 | |
666 | /* | |
667 | * Display superblock I/O counters | |
668 | */ | |
669 | for_each_possible_cpu(cpu) { | |
670 | struct nfs_iostats *stats; | |
671 | ||
672 | preempt_disable(); | |
673 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
674 | ||
675 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
676 | totals.events[i] += stats->events[i]; | |
677 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
678 | totals.bytes[i] += stats->bytes[i]; | |
6a51091d DH |
679 | #ifdef CONFIG_NFS_FSCACHE |
680 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
681 | totals.fscache[i] += stats->fscache[i]; | |
682 | #endif | |
f7b422b1 DH |
683 | |
684 | preempt_enable(); | |
685 | } | |
686 | ||
687 | seq_printf(m, "\n\tevents:\t"); | |
688 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
689 | seq_printf(m, "%lu ", totals.events[i]); | |
690 | seq_printf(m, "\n\tbytes:\t"); | |
691 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
692 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
6a51091d DH |
693 | #ifdef CONFIG_NFS_FSCACHE |
694 | if (nfss->options & NFS_OPTION_FSCACHE) { | |
695 | seq_printf(m, "\n\tfsc:\t"); | |
696 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
697 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
698 | } | |
699 | #endif | |
f7b422b1 DH |
700 | seq_printf(m, "\n"); |
701 | ||
702 | rpc_print_iostats(m, nfss->client); | |
703 | ||
704 | return 0; | |
705 | } | |
706 | ||
707 | /* | |
708 | * Begin unmount by attempting to remove all automounted mountpoints we added | |
54ceac45 | 709 | * in response to xdev traversals and referrals |
f7b422b1 | 710 | */ |
42faad99 | 711 | static void nfs_umount_begin(struct super_block *sb) |
f7b422b1 | 712 | { |
67e55205 | 713 | struct nfs_server *server; |
fc6ae3cf TM |
714 | struct rpc_clnt *rpc; |
715 | ||
67e55205 AIB |
716 | lock_kernel(); |
717 | ||
718 | server = NFS_SB(sb); | |
fc6ae3cf TM |
719 | /* -EIO all pending I/O */ |
720 | rpc = server->client_acl; | |
721 | if (!IS_ERR(rpc)) | |
722 | rpc_killall_tasks(rpc); | |
723 | rpc = server->client; | |
724 | if (!IS_ERR(rpc)) | |
725 | rpc_killall_tasks(rpc); | |
67e55205 AIB |
726 | |
727 | unlock_kernel(); | |
f7b422b1 DH |
728 | } |
729 | ||
fc50d58f | 730 | /* |
cdcd7f9a CL |
731 | * Sanity-check a server address provided by the mount command. |
732 | * | |
733 | * Address family must be initialized, and address must not be | |
734 | * the ANY address for that family. | |
fc50d58f CL |
735 | */ |
736 | static int nfs_verify_server_address(struct sockaddr *addr) | |
737 | { | |
738 | switch (addr->sa_family) { | |
739 | case AF_INET: { | |
cdcd7f9a | 740 | struct sockaddr_in *sa = (struct sockaddr_in *)addr; |
e6f1cebf | 741 | return sa->sin_addr.s_addr != htonl(INADDR_ANY); |
cdcd7f9a CL |
742 | } |
743 | case AF_INET6: { | |
744 | struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr; | |
745 | return !ipv6_addr_any(sa); | |
fc50d58f CL |
746 | } |
747 | } | |
748 | ||
53a0b9c4 | 749 | dfprintk(MOUNT, "NFS: Invalid IP address specified\n"); |
fc50d58f CL |
750 | return 0; |
751 | } | |
752 | ||
4cfd74fc CL |
753 | /* |
754 | * Select between a default port value and a user-specified port value. | |
755 | * If a zero value is set, then autobind will be used. | |
756 | */ | |
757 | static void nfs_set_default_port(struct sockaddr *sap, const int parsed_port, | |
758 | const unsigned short default_port) | |
759 | { | |
760 | unsigned short port = default_port; | |
761 | ||
762 | if (parsed_port != NFS_UNSPEC_PORT) | |
763 | port = parsed_port; | |
764 | ||
765 | rpc_set_port(sap, port); | |
766 | } | |
767 | ||
259875ef TM |
768 | /* |
769 | * Sanity check the NFS transport protocol. | |
770 | * | |
771 | */ | |
772 | static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
773 | { | |
774 | switch (mnt->nfs_server.protocol) { | |
775 | case XPRT_TRANSPORT_UDP: | |
776 | case XPRT_TRANSPORT_TCP: | |
777 | case XPRT_TRANSPORT_RDMA: | |
778 | break; | |
779 | default: | |
780 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; | |
781 | } | |
782 | } | |
783 | ||
784 | /* | |
785 | * For text based NFSv2/v3 mounts, the mount protocol transport default | |
786 | * settings should depend upon the specified NFS transport. | |
787 | */ | |
788 | static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
789 | { | |
790 | nfs_validate_transport_protocol(mnt); | |
791 | ||
792 | if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP || | |
793 | mnt->mount_server.protocol == XPRT_TRANSPORT_TCP) | |
794 | return; | |
795 | switch (mnt->nfs_server.protocol) { | |
796 | case XPRT_TRANSPORT_UDP: | |
797 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; | |
798 | break; | |
799 | case XPRT_TRANSPORT_TCP: | |
800 | case XPRT_TRANSPORT_RDMA: | |
801 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; | |
802 | } | |
803 | } | |
804 | ||
01060c89 CL |
805 | /* |
806 | * Parse the value of the 'sec=' option. | |
01060c89 CL |
807 | */ |
808 | static int nfs_parse_security_flavors(char *value, | |
809 | struct nfs_parsed_mount_data *mnt) | |
810 | { | |
811 | substring_t args[MAX_OPT_ARGS]; | |
812 | ||
813 | dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); | |
814 | ||
815 | switch (match_token(value, nfs_secflavor_tokens, args)) { | |
816 | case Opt_sec_none: | |
01060c89 CL |
817 | mnt->auth_flavors[0] = RPC_AUTH_NULL; |
818 | break; | |
819 | case Opt_sec_sys: | |
01060c89 CL |
820 | mnt->auth_flavors[0] = RPC_AUTH_UNIX; |
821 | break; | |
822 | case Opt_sec_krb5: | |
01060c89 CL |
823 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5; |
824 | break; | |
825 | case Opt_sec_krb5i: | |
01060c89 CL |
826 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I; |
827 | break; | |
828 | case Opt_sec_krb5p: | |
01060c89 CL |
829 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P; |
830 | break; | |
831 | case Opt_sec_lkey: | |
01060c89 CL |
832 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY; |
833 | break; | |
834 | case Opt_sec_lkeyi: | |
01060c89 CL |
835 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI; |
836 | break; | |
837 | case Opt_sec_lkeyp: | |
01060c89 CL |
838 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP; |
839 | break; | |
840 | case Opt_sec_spkm: | |
01060c89 CL |
841 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM; |
842 | break; | |
843 | case Opt_sec_spkmi: | |
01060c89 CL |
844 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI; |
845 | break; | |
846 | case Opt_sec_spkmp: | |
01060c89 CL |
847 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP; |
848 | break; | |
849 | default: | |
850 | return 0; | |
851 | } | |
852 | ||
059f90b3 | 853 | mnt->auth_flavor_len = 1; |
01060c89 CL |
854 | return 1; |
855 | } | |
856 | ||
bf0fd768 CL |
857 | /* |
858 | * Error-check and convert a string of mount options from user space into | |
f45663ce CL |
859 | * a data structure. The whole mount string is processed; bad options are |
860 | * skipped as they are encountered. If there were no errors, return 1; | |
861 | * otherwise return 0 (zero). | |
bf0fd768 CL |
862 | */ |
863 | static int nfs_parse_mount_options(char *raw, | |
864 | struct nfs_parsed_mount_data *mnt) | |
865 | { | |
f9c3a380 | 866 | char *p, *string, *secdata; |
d23c45fd | 867 | int rc, sloppy = 0, invalid_option = 0; |
bf0fd768 CL |
868 | |
869 | if (!raw) { | |
870 | dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); | |
871 | return 1; | |
872 | } | |
873 | dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); | |
874 | ||
f9c3a380 EP |
875 | secdata = alloc_secdata(); |
876 | if (!secdata) | |
877 | goto out_nomem; | |
878 | ||
879 | rc = security_sb_copy_data(raw, secdata); | |
880 | if (rc) | |
881 | goto out_security_failure; | |
882 | ||
883 | rc = security_sb_parse_opts_str(secdata, &mnt->lsm_opts); | |
884 | if (rc) | |
885 | goto out_security_failure; | |
886 | ||
887 | free_secdata(secdata); | |
888 | ||
bf0fd768 CL |
889 | while ((p = strsep(&raw, ",")) != NULL) { |
890 | substring_t args[MAX_OPT_ARGS]; | |
a5a16bae CL |
891 | unsigned long option; |
892 | int token; | |
bf0fd768 CL |
893 | |
894 | if (!*p) | |
895 | continue; | |
896 | ||
897 | dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); | |
898 | ||
899 | token = match_token(p, nfs_mount_option_tokens, args); | |
900 | switch (token) { | |
f45663ce CL |
901 | |
902 | /* | |
903 | * boolean options: foo/nofoo | |
904 | */ | |
bf0fd768 CL |
905 | case Opt_soft: |
906 | mnt->flags |= NFS_MOUNT_SOFT; | |
907 | break; | |
908 | case Opt_hard: | |
909 | mnt->flags &= ~NFS_MOUNT_SOFT; | |
910 | break; | |
bf0fd768 CL |
911 | case Opt_posix: |
912 | mnt->flags |= NFS_MOUNT_POSIX; | |
913 | break; | |
914 | case Opt_noposix: | |
915 | mnt->flags &= ~NFS_MOUNT_POSIX; | |
916 | break; | |
917 | case Opt_cto: | |
918 | mnt->flags &= ~NFS_MOUNT_NOCTO; | |
919 | break; | |
920 | case Opt_nocto: | |
921 | mnt->flags |= NFS_MOUNT_NOCTO; | |
922 | break; | |
923 | case Opt_ac: | |
924 | mnt->flags &= ~NFS_MOUNT_NOAC; | |
925 | break; | |
926 | case Opt_noac: | |
927 | mnt->flags |= NFS_MOUNT_NOAC; | |
928 | break; | |
929 | case Opt_lock: | |
930 | mnt->flags &= ~NFS_MOUNT_NONLM; | |
931 | break; | |
932 | case Opt_nolock: | |
933 | mnt->flags |= NFS_MOUNT_NONLM; | |
934 | break; | |
935 | case Opt_v2: | |
936 | mnt->flags &= ~NFS_MOUNT_VER3; | |
937 | break; | |
938 | case Opt_v3: | |
939 | mnt->flags |= NFS_MOUNT_VER3; | |
940 | break; | |
941 | case Opt_udp: | |
942 | mnt->flags &= ~NFS_MOUNT_TCP; | |
0896a725 | 943 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 CL |
944 | break; |
945 | case Opt_tcp: | |
946 | mnt->flags |= NFS_MOUNT_TCP; | |
0896a725 | 947 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 948 | break; |
2cf7ff7a TT |
949 | case Opt_rdma: |
950 | mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ | |
951 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 952 | xprt_load_transport(p); |
2cf7ff7a | 953 | break; |
bf0fd768 CL |
954 | case Opt_acl: |
955 | mnt->flags &= ~NFS_MOUNT_NOACL; | |
956 | break; | |
957 | case Opt_noacl: | |
958 | mnt->flags |= NFS_MOUNT_NOACL; | |
959 | break; | |
960 | case Opt_rdirplus: | |
961 | mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; | |
962 | break; | |
963 | case Opt_nordirplus: | |
964 | mnt->flags |= NFS_MOUNT_NORDIRPLUS; | |
965 | break; | |
75180df2 TM |
966 | case Opt_sharecache: |
967 | mnt->flags &= ~NFS_MOUNT_UNSHARED; | |
968 | break; | |
969 | case Opt_nosharecache: | |
970 | mnt->flags |= NFS_MOUNT_UNSHARED; | |
971 | break; | |
d740351b CL |
972 | case Opt_resvport: |
973 | mnt->flags &= ~NFS_MOUNT_NORESVPORT; | |
974 | break; | |
975 | case Opt_noresvport: | |
976 | mnt->flags |= NFS_MOUNT_NORESVPORT; | |
977 | break; | |
b797cac7 DH |
978 | case Opt_fscache: |
979 | mnt->options |= NFS_OPTION_FSCACHE; | |
980 | kfree(mnt->fscache_uniq); | |
981 | mnt->fscache_uniq = NULL; | |
982 | break; | |
983 | case Opt_nofscache: | |
984 | mnt->options &= ~NFS_OPTION_FSCACHE; | |
985 | kfree(mnt->fscache_uniq); | |
986 | mnt->fscache_uniq = NULL; | |
987 | break; | |
988 | case Opt_fscache_uniq: | |
989 | string = match_strdup(args); | |
990 | if (!string) | |
991 | goto out_nomem; | |
992 | kfree(mnt->fscache_uniq); | |
993 | mnt->fscache_uniq = string; | |
994 | mnt->options |= NFS_OPTION_FSCACHE; | |
995 | break; | |
bf0fd768 | 996 | |
f45663ce CL |
997 | /* |
998 | * options that take numeric values | |
999 | */ | |
bf0fd768 | 1000 | case Opt_port: |
a5a16bae CL |
1001 | string = match_strdup(args); |
1002 | if (string == NULL) | |
1003 | goto out_nomem; | |
1004 | rc = strict_strtoul(string, 10, &option); | |
1005 | kfree(string); | |
1006 | if (rc != 0 || option > USHORT_MAX) | |
d23c45fd CL |
1007 | goto out_invalid_value; |
1008 | mnt->nfs_server.port = option; | |
bf0fd768 CL |
1009 | break; |
1010 | case Opt_rsize: | |
a5a16bae CL |
1011 | string = match_strdup(args); |
1012 | if (string == NULL) | |
1013 | goto out_nomem; | |
1014 | rc = strict_strtoul(string, 10, &option); | |
1015 | kfree(string); | |
1016 | if (rc != 0) | |
d23c45fd CL |
1017 | goto out_invalid_value; |
1018 | mnt->rsize = option; | |
bf0fd768 CL |
1019 | break; |
1020 | case Opt_wsize: | |
a5a16bae CL |
1021 | string = match_strdup(args); |
1022 | if (string == NULL) | |
1023 | goto out_nomem; | |
1024 | rc = strict_strtoul(string, 10, &option); | |
1025 | kfree(string); | |
1026 | if (rc != 0) | |
d23c45fd CL |
1027 | goto out_invalid_value; |
1028 | mnt->wsize = option; | |
bf0fd768 CL |
1029 | break; |
1030 | case Opt_bsize: | |
a5a16bae CL |
1031 | string = match_strdup(args); |
1032 | if (string == NULL) | |
1033 | goto out_nomem; | |
1034 | rc = strict_strtoul(string, 10, &option); | |
1035 | kfree(string); | |
1036 | if (rc != 0) | |
d23c45fd CL |
1037 | goto out_invalid_value; |
1038 | mnt->bsize = option; | |
bf0fd768 CL |
1039 | break; |
1040 | case Opt_timeo: | |
a5a16bae CL |
1041 | string = match_strdup(args); |
1042 | if (string == NULL) | |
1043 | goto out_nomem; | |
1044 | rc = strict_strtoul(string, 10, &option); | |
1045 | kfree(string); | |
1046 | if (rc != 0 || option == 0) | |
d23c45fd CL |
1047 | goto out_invalid_value; |
1048 | mnt->timeo = option; | |
bf0fd768 CL |
1049 | break; |
1050 | case Opt_retrans: | |
a5a16bae CL |
1051 | string = match_strdup(args); |
1052 | if (string == NULL) | |
1053 | goto out_nomem; | |
1054 | rc = strict_strtoul(string, 10, &option); | |
1055 | kfree(string); | |
1056 | if (rc != 0 || option == 0) | |
d23c45fd CL |
1057 | goto out_invalid_value; |
1058 | mnt->retrans = option; | |
bf0fd768 CL |
1059 | break; |
1060 | case Opt_acregmin: | |
a5a16bae CL |
1061 | string = match_strdup(args); |
1062 | if (string == NULL) | |
1063 | goto out_nomem; | |
1064 | rc = strict_strtoul(string, 10, &option); | |
1065 | kfree(string); | |
1066 | if (rc != 0) | |
d23c45fd CL |
1067 | goto out_invalid_value; |
1068 | mnt->acregmin = option; | |
bf0fd768 CL |
1069 | break; |
1070 | case Opt_acregmax: | |
a5a16bae CL |
1071 | string = match_strdup(args); |
1072 | if (string == NULL) | |
1073 | goto out_nomem; | |
1074 | rc = strict_strtoul(string, 10, &option); | |
1075 | kfree(string); | |
1076 | if (rc != 0) | |
d23c45fd CL |
1077 | goto out_invalid_value; |
1078 | mnt->acregmax = option; | |
bf0fd768 CL |
1079 | break; |
1080 | case Opt_acdirmin: | |
a5a16bae CL |
1081 | string = match_strdup(args); |
1082 | if (string == NULL) | |
1083 | goto out_nomem; | |
1084 | rc = strict_strtoul(string, 10, &option); | |
1085 | kfree(string); | |
1086 | if (rc != 0) | |
d23c45fd CL |
1087 | goto out_invalid_value; |
1088 | mnt->acdirmin = option; | |
bf0fd768 CL |
1089 | break; |
1090 | case Opt_acdirmax: | |
a5a16bae CL |
1091 | string = match_strdup(args); |
1092 | if (string == NULL) | |
1093 | goto out_nomem; | |
1094 | rc = strict_strtoul(string, 10, &option); | |
1095 | kfree(string); | |
1096 | if (rc != 0) | |
d23c45fd CL |
1097 | goto out_invalid_value; |
1098 | mnt->acdirmax = option; | |
bf0fd768 CL |
1099 | break; |
1100 | case Opt_actimeo: | |
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) | |
d23c45fd CL |
1107 | goto out_invalid_value; |
1108 | mnt->acregmin = mnt->acregmax = | |
1109 | mnt->acdirmin = mnt->acdirmax = option; | |
bf0fd768 CL |
1110 | break; |
1111 | case Opt_namelen: | |
a5a16bae CL |
1112 | string = match_strdup(args); |
1113 | if (string == NULL) | |
1114 | goto out_nomem; | |
1115 | rc = strict_strtoul(string, 10, &option); | |
1116 | kfree(string); | |
1117 | if (rc != 0) | |
d23c45fd CL |
1118 | goto out_invalid_value; |
1119 | mnt->namlen = option; | |
bf0fd768 CL |
1120 | break; |
1121 | case Opt_mountport: | |
a5a16bae CL |
1122 | string = match_strdup(args); |
1123 | if (string == NULL) | |
1124 | goto out_nomem; | |
1125 | rc = strict_strtoul(string, 10, &option); | |
1126 | kfree(string); | |
1127 | if (rc != 0 || option > USHORT_MAX) | |
d23c45fd CL |
1128 | goto out_invalid_value; |
1129 | mnt->mount_server.port = option; | |
bf0fd768 | 1130 | break; |
bf0fd768 | 1131 | case Opt_mountvers: |
a5a16bae CL |
1132 | string = match_strdup(args); |
1133 | if (string == NULL) | |
1134 | goto out_nomem; | |
1135 | rc = strict_strtoul(string, 10, &option); | |
1136 | kfree(string); | |
1137 | if (rc != 0 || | |
f45663ce | 1138 | option < NFS_MNT_VERSION || |
d23c45fd CL |
1139 | option > NFS_MNT3_VERSION) |
1140 | goto out_invalid_value; | |
1141 | mnt->mount_server.version = option; | |
bf0fd768 | 1142 | break; |
bf0fd768 | 1143 | case Opt_nfsvers: |
a5a16bae CL |
1144 | string = match_strdup(args); |
1145 | if (string == NULL) | |
1146 | goto out_nomem; | |
1147 | rc = strict_strtoul(string, 10, &option); | |
1148 | kfree(string); | |
1149 | if (rc != 0) | |
d23c45fd | 1150 | goto out_invalid_value; |
bf0fd768 | 1151 | switch (option) { |
f45663ce | 1152 | case NFS2_VERSION: |
bf0fd768 CL |
1153 | mnt->flags &= ~NFS_MOUNT_VER3; |
1154 | break; | |
f45663ce | 1155 | case NFS3_VERSION: |
bf0fd768 CL |
1156 | mnt->flags |= NFS_MOUNT_VER3; |
1157 | break; | |
1158 | default: | |
d23c45fd | 1159 | goto out_invalid_value; |
bf0fd768 CL |
1160 | } |
1161 | break; | |
3fd5be9e | 1162 | case Opt_minorversion: |
f3f4f4ed CL |
1163 | string = match_strdup(args); |
1164 | if (string == NULL) | |
1165 | goto out_nomem; | |
1166 | rc = strict_strtoul(string, 10, &option); | |
1167 | kfree(string); | |
1168 | if (rc != 0) | |
1169 | goto out_invalid_value; | |
1170 | if (option > NFS4_MAX_MINOR_VERSION) | |
1171 | goto out_invalid_value; | |
1172 | mnt->minorversion = option; | |
3fd5be9e | 1173 | break; |
bf0fd768 | 1174 | |
f45663ce CL |
1175 | /* |
1176 | * options that take text values | |
1177 | */ | |
bf0fd768 CL |
1178 | case Opt_sec: |
1179 | string = match_strdup(args); | |
1180 | if (string == NULL) | |
1181 | goto out_nomem; | |
01060c89 | 1182 | rc = nfs_parse_security_flavors(string, mnt); |
bf0fd768 | 1183 | kfree(string); |
f45663ce | 1184 | if (!rc) { |
f45663ce CL |
1185 | dfprintk(MOUNT, "NFS: unrecognized " |
1186 | "security flavor\n"); | |
d23c45fd | 1187 | return 0; |
f45663ce | 1188 | } |
bf0fd768 CL |
1189 | break; |
1190 | case Opt_proto: | |
1191 | string = match_strdup(args); | |
1192 | if (string == NULL) | |
1193 | goto out_nomem; | |
1194 | token = match_token(string, | |
1195 | nfs_xprt_protocol_tokens, args); | |
bf0fd768 CL |
1196 | |
1197 | switch (token) { | |
fdb66ff4 | 1198 | case Opt_xprt_udp: |
bf0fd768 | 1199 | mnt->flags &= ~NFS_MOUNT_TCP; |
0896a725 | 1200 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
d23c45fd | 1201 | kfree(string); |
bf0fd768 | 1202 | break; |
fdb66ff4 | 1203 | case Opt_xprt_tcp: |
bf0fd768 | 1204 | mnt->flags |= NFS_MOUNT_TCP; |
0896a725 | 1205 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
d23c45fd | 1206 | kfree(string); |
bf0fd768 | 1207 | break; |
2cf7ff7a TT |
1208 | case Opt_xprt_rdma: |
1209 | /* vector side protocols to TCP */ | |
1210 | mnt->flags |= NFS_MOUNT_TCP; | |
1211 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 1212 | xprt_load_transport(string); |
d23c45fd | 1213 | kfree(string); |
2cf7ff7a | 1214 | break; |
bf0fd768 | 1215 | default: |
f45663ce CL |
1216 | dfprintk(MOUNT, "NFS: unrecognized " |
1217 | "transport protocol\n"); | |
d23c45fd | 1218 | return 0; |
bf0fd768 CL |
1219 | } |
1220 | break; | |
1221 | case Opt_mountproto: | |
1222 | string = match_strdup(args); | |
1223 | if (string == NULL) | |
1224 | goto out_nomem; | |
1225 | token = match_token(string, | |
1226 | nfs_xprt_protocol_tokens, args); | |
d508afb4 | 1227 | kfree(string); |
bf0fd768 CL |
1228 | |
1229 | switch (token) { | |
fdb66ff4 | 1230 | case Opt_xprt_udp: |
0896a725 | 1231 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 | 1232 | break; |
fdb66ff4 | 1233 | case Opt_xprt_tcp: |
0896a725 | 1234 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1235 | break; |
2cf7ff7a | 1236 | case Opt_xprt_rdma: /* not used for side protocols */ |
bf0fd768 | 1237 | default: |
f45663ce CL |
1238 | dfprintk(MOUNT, "NFS: unrecognized " |
1239 | "transport protocol\n"); | |
d23c45fd | 1240 | return 0; |
bf0fd768 CL |
1241 | } |
1242 | break; | |
1243 | case Opt_addr: | |
1244 | string = match_strdup(args); | |
1245 | if (string == NULL) | |
1246 | goto out_nomem; | |
53a0b9c4 CL |
1247 | mnt->nfs_server.addrlen = |
1248 | rpc_pton(string, strlen(string), | |
1249 | (struct sockaddr *) | |
1250 | &mnt->nfs_server.address, | |
1251 | sizeof(mnt->nfs_server.address)); | |
bf0fd768 | 1252 | kfree(string); |
53a0b9c4 CL |
1253 | if (mnt->nfs_server.addrlen == 0) |
1254 | goto out_invalid_address; | |
bf0fd768 CL |
1255 | break; |
1256 | case Opt_clientaddr: | |
1257 | string = match_strdup(args); | |
1258 | if (string == NULL) | |
1259 | goto out_nomem; | |
fc601477 | 1260 | kfree(mnt->client_address); |
bf0fd768 CL |
1261 | mnt->client_address = string; |
1262 | break; | |
33832034 CL |
1263 | case Opt_mounthost: |
1264 | string = match_strdup(args); | |
1265 | if (string == NULL) | |
1266 | goto out_nomem; | |
fc601477 | 1267 | kfree(mnt->mount_server.hostname); |
33832034 CL |
1268 | mnt->mount_server.hostname = string; |
1269 | break; | |
0ac83779 | 1270 | case Opt_mountaddr: |
bf0fd768 CL |
1271 | string = match_strdup(args); |
1272 | if (string == NULL) | |
1273 | goto out_nomem; | |
53a0b9c4 CL |
1274 | mnt->mount_server.addrlen = |
1275 | rpc_pton(string, strlen(string), | |
1276 | (struct sockaddr *) | |
1277 | &mnt->mount_server.address, | |
1278 | sizeof(mnt->mount_server.address)); | |
bf0fd768 | 1279 | kfree(string); |
53a0b9c4 CL |
1280 | if (mnt->mount_server.addrlen == 0) |
1281 | goto out_invalid_address; | |
bf0fd768 | 1282 | break; |
7973c1f1 TM |
1283 | case Opt_lookupcache: |
1284 | string = match_strdup(args); | |
1285 | if (string == NULL) | |
1286 | goto out_nomem; | |
1287 | token = match_token(string, | |
1288 | nfs_lookupcache_tokens, args); | |
1289 | kfree(string); | |
1290 | switch (token) { | |
1291 | case Opt_lookupcache_all: | |
1292 | mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); | |
1293 | break; | |
1294 | case Opt_lookupcache_positive: | |
1295 | mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1296 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; | |
1297 | break; | |
1298 | case Opt_lookupcache_none: | |
1299 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1300 | break; | |
1301 | default: | |
7973c1f1 TM |
1302 | dfprintk(MOUNT, "NFS: invalid " |
1303 | "lookupcache argument\n"); | |
d23c45fd | 1304 | return 0; |
7973c1f1 TM |
1305 | }; |
1306 | break; | |
bf0fd768 | 1307 | |
f45663ce CL |
1308 | /* |
1309 | * Special options | |
1310 | */ | |
1311 | case Opt_sloppy: | |
1312 | sloppy = 1; | |
1313 | dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); | |
1314 | break; | |
bf0fd768 CL |
1315 | case Opt_userspace: |
1316 | case Opt_deprecated: | |
d33e4dfe CL |
1317 | dfprintk(MOUNT, "NFS: ignoring mount option " |
1318 | "'%s'\n", p); | |
bf0fd768 CL |
1319 | break; |
1320 | ||
1321 | default: | |
d23c45fd | 1322 | invalid_option = 1; |
f45663ce CL |
1323 | dfprintk(MOUNT, "NFS: unrecognized mount option " |
1324 | "'%s'\n", p); | |
bf0fd768 CL |
1325 | } |
1326 | } | |
1327 | ||
d23c45fd CL |
1328 | if (!sloppy && invalid_option) |
1329 | return 0; | |
1330 | ||
bf0fd768 CL |
1331 | return 1; |
1332 | ||
53a0b9c4 CL |
1333 | out_invalid_address: |
1334 | printk(KERN_INFO "NFS: bad IP address specified: %s\n", p); | |
1335 | return 0; | |
d23c45fd | 1336 | out_invalid_value: |
53a0b9c4 | 1337 | printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); |
d23c45fd | 1338 | return 0; |
bf0fd768 CL |
1339 | out_nomem: |
1340 | printk(KERN_INFO "NFS: not enough memory to parse option\n"); | |
1341 | return 0; | |
f9c3a380 EP |
1342 | out_security_failure: |
1343 | free_secdata(secdata); | |
1344 | printk(KERN_INFO "NFS: security options invalid: %d\n", rc); | |
1345 | return 0; | |
bf0fd768 CL |
1346 | } |
1347 | ||
ec88f28d CL |
1348 | /* |
1349 | * Match the requested auth flavors with the list returned by | |
1350 | * the server. Returns zero and sets the mount's authentication | |
1351 | * flavor on success; returns -EACCES if server does not support | |
1352 | * the requested flavor. | |
1353 | */ | |
1354 | static int nfs_walk_authlist(struct nfs_parsed_mount_data *args, | |
1355 | struct nfs_mount_request *request) | |
1356 | { | |
1357 | unsigned int i, j, server_authlist_len = *(request->auth_flav_len); | |
1358 | ||
5eecfde6 CL |
1359 | /* |
1360 | * Certain releases of Linux's mountd return an empty | |
1361 | * flavor list. To prevent behavioral regression with | |
1362 | * these servers (ie. rejecting mounts that used to | |
1363 | * succeed), revert to pre-2.6.32 behavior (no checking) | |
1364 | * if the returned flavor list is empty. | |
1365 | */ | |
1366 | if (server_authlist_len == 0) | |
1367 | return 0; | |
1368 | ||
ec88f28d CL |
1369 | /* |
1370 | * We avoid sophisticated negotiating here, as there are | |
1371 | * plenty of cases where we can get it wrong, providing | |
1372 | * either too little or too much security. | |
1373 | * | |
1374 | * RFC 2623, section 2.7 suggests we SHOULD prefer the | |
1375 | * flavor listed first. However, some servers list | |
1376 | * AUTH_NULL first. Our caller plants AUTH_SYS, the | |
1377 | * preferred default, in args->auth_flavors[0] if user | |
1378 | * didn't specify sec= mount option. | |
1379 | */ | |
1380 | for (i = 0; i < args->auth_flavor_len; i++) | |
1381 | for (j = 0; j < server_authlist_len; j++) | |
1382 | if (args->auth_flavors[i] == request->auth_flavs[j]) { | |
1383 | dfprintk(MOUNT, "NFS: using auth flavor %d\n", | |
1384 | request->auth_flavs[j]); | |
1385 | args->auth_flavors[0] = request->auth_flavs[j]; | |
1386 | return 0; | |
1387 | } | |
1388 | ||
1389 | dfprintk(MOUNT, "NFS: server does not support requested auth flavor\n"); | |
1390 | nfs_umount(request); | |
1391 | return -EACCES; | |
1392 | } | |
1393 | ||
0076d7b7 CL |
1394 | /* |
1395 | * Use the remote server's MOUNT service to request the NFS file handle | |
1396 | * corresponding to the provided path. | |
1397 | */ | |
1398 | static int nfs_try_mount(struct nfs_parsed_mount_data *args, | |
1399 | struct nfs_fh *root_fh) | |
1400 | { | |
ec88f28d CL |
1401 | rpc_authflavor_t server_authlist[NFS_MAX_SECFLAVORS]; |
1402 | unsigned int server_authlist_len = ARRAY_SIZE(server_authlist); | |
c5d120f8 CL |
1403 | struct nfs_mount_request request = { |
1404 | .sap = (struct sockaddr *) | |
1405 | &args->mount_server.address, | |
1406 | .dirpath = args->nfs_server.export_path, | |
1407 | .protocol = args->mount_server.protocol, | |
1408 | .fh = root_fh, | |
50a737f8 | 1409 | .noresvport = args->flags & NFS_MOUNT_NORESVPORT, |
ec88f28d CL |
1410 | .auth_flav_len = &server_authlist_len, |
1411 | .auth_flavs = server_authlist, | |
c5d120f8 | 1412 | }; |
4c568017 | 1413 | int status; |
0076d7b7 CL |
1414 | |
1415 | if (args->mount_server.version == 0) { | |
1416 | if (args->flags & NFS_MOUNT_VER3) | |
1417 | args->mount_server.version = NFS_MNT3_VERSION; | |
1418 | else | |
1419 | args->mount_server.version = NFS_MNT_VERSION; | |
1420 | } | |
c5d120f8 | 1421 | request.version = args->mount_server.version; |
0076d7b7 | 1422 | |
33832034 | 1423 | if (args->mount_server.hostname) |
c5d120f8 | 1424 | request.hostname = args->mount_server.hostname; |
33832034 | 1425 | else |
c5d120f8 | 1426 | request.hostname = args->nfs_server.hostname; |
33832034 | 1427 | |
0076d7b7 CL |
1428 | /* |
1429 | * Construct the mount server's address. | |
1430 | */ | |
4c568017 | 1431 | if (args->mount_server.address.ss_family == AF_UNSPEC) { |
c5d120f8 | 1432 | memcpy(request.sap, &args->nfs_server.address, |
4c568017 CL |
1433 | args->nfs_server.addrlen); |
1434 | args->mount_server.addrlen = args->nfs_server.addrlen; | |
1435 | } | |
c5d120f8 | 1436 | request.salen = args->mount_server.addrlen; |
4cfd74fc | 1437 | nfs_set_default_port(request.sap, args->mount_server.port, 0); |
0076d7b7 CL |
1438 | |
1439 | /* | |
1440 | * Now ask the mount server to map our export path | |
1441 | * to a file handle. | |
1442 | */ | |
c5d120f8 | 1443 | status = nfs_mount(&request); |
ec88f28d CL |
1444 | if (status != 0) { |
1445 | dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n", | |
1446 | request.hostname, status); | |
1447 | return status; | |
1448 | } | |
0076d7b7 | 1449 | |
ec88f28d CL |
1450 | /* |
1451 | * MNTv1 (NFSv2) does not support auth flavor negotiation. | |
1452 | */ | |
1453 | if (args->mount_server.version != NFS_MNT3_VERSION) | |
1454 | return 0; | |
1455 | return nfs_walk_authlist(args, &request); | |
0076d7b7 CL |
1456 | } |
1457 | ||
d1aa0825 CL |
1458 | static int nfs_parse_simple_hostname(const char *dev_name, |
1459 | char **hostname, size_t maxnamlen, | |
1460 | char **export_path, size_t maxpathlen) | |
dc045898 CL |
1461 | { |
1462 | size_t len; | |
1463 | char *colon, *comma; | |
1464 | ||
1465 | colon = strchr(dev_name, ':'); | |
1466 | if (colon == NULL) | |
1467 | goto out_bad_devname; | |
1468 | ||
1469 | len = colon - dev_name; | |
1470 | if (len > maxnamlen) | |
1471 | goto out_hostname; | |
1472 | ||
1473 | /* N.B. caller will free nfs_server.hostname in all cases */ | |
1474 | *hostname = kstrndup(dev_name, len, GFP_KERNEL); | |
1475 | if (!*hostname) | |
1476 | goto out_nomem; | |
1477 | ||
1478 | /* kill possible hostname list: not supported */ | |
1479 | comma = strchr(*hostname, ','); | |
1480 | if (comma != NULL) { | |
1481 | if (comma == *hostname) | |
1482 | goto out_bad_devname; | |
1483 | *comma = '\0'; | |
1484 | } | |
1485 | ||
1486 | colon++; | |
1487 | len = strlen(colon); | |
1488 | if (len > maxpathlen) | |
1489 | goto out_path; | |
1490 | *export_path = kstrndup(colon, len, GFP_KERNEL); | |
1491 | if (!*export_path) | |
1492 | goto out_nomem; | |
1493 | ||
1494 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path); | |
1495 | return 0; | |
1496 | ||
1497 | out_bad_devname: | |
1498 | dfprintk(MOUNT, "NFS: device name not in host:path format\n"); | |
1499 | return -EINVAL; | |
1500 | ||
1501 | out_nomem: | |
1502 | dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); | |
1503 | return -ENOMEM; | |
1504 | ||
1505 | out_hostname: | |
1506 | dfprintk(MOUNT, "NFS: server hostname too long\n"); | |
1507 | return -ENAMETOOLONG; | |
1508 | ||
1509 | out_path: | |
1510 | dfprintk(MOUNT, "NFS: export pathname too long\n"); | |
1511 | return -ENAMETOOLONG; | |
1512 | } | |
1513 | ||
d1aa0825 CL |
1514 | /* |
1515 | * Hostname has square brackets around it because it contains one or | |
1516 | * more colons. We look for the first closing square bracket, and a | |
1517 | * colon must follow it. | |
1518 | */ | |
1519 | static int nfs_parse_protected_hostname(const char *dev_name, | |
1520 | char **hostname, size_t maxnamlen, | |
1521 | char **export_path, size_t maxpathlen) | |
1522 | { | |
1523 | size_t len; | |
1524 | char *start, *end; | |
1525 | ||
1526 | start = (char *)(dev_name + 1); | |
1527 | ||
1528 | end = strchr(start, ']'); | |
1529 | if (end == NULL) | |
1530 | goto out_bad_devname; | |
1531 | if (*(end + 1) != ':') | |
1532 | goto out_bad_devname; | |
1533 | ||
1534 | len = end - start; | |
1535 | if (len > maxnamlen) | |
1536 | goto out_hostname; | |
1537 | ||
1538 | /* N.B. caller will free nfs_server.hostname in all cases */ | |
1539 | *hostname = kstrndup(start, len, GFP_KERNEL); | |
1540 | if (*hostname == NULL) | |
1541 | goto out_nomem; | |
1542 | ||
1543 | end += 2; | |
1544 | len = strlen(end); | |
1545 | if (len > maxpathlen) | |
1546 | goto out_path; | |
1547 | *export_path = kstrndup(end, len, GFP_KERNEL); | |
1548 | if (!*export_path) | |
1549 | goto out_nomem; | |
1550 | ||
1551 | return 0; | |
1552 | ||
1553 | out_bad_devname: | |
1554 | dfprintk(MOUNT, "NFS: device name not in host:path format\n"); | |
1555 | return -EINVAL; | |
1556 | ||
1557 | out_nomem: | |
1558 | dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); | |
1559 | return -ENOMEM; | |
1560 | ||
1561 | out_hostname: | |
1562 | dfprintk(MOUNT, "NFS: server hostname too long\n"); | |
1563 | return -ENAMETOOLONG; | |
1564 | ||
1565 | out_path: | |
1566 | dfprintk(MOUNT, "NFS: export pathname too long\n"); | |
1567 | return -ENAMETOOLONG; | |
1568 | } | |
1569 | ||
1570 | /* | |
1571 | * Split "dev_name" into "hostname:export_path". | |
1572 | * | |
1573 | * The leftmost colon demarks the split between the server's hostname | |
1574 | * and the export path. If the hostname starts with a left square | |
1575 | * bracket, then it may contain colons. | |
1576 | * | |
1577 | * Note: caller frees hostname and export path, even on error. | |
1578 | */ | |
1579 | static int nfs_parse_devname(const char *dev_name, | |
1580 | char **hostname, size_t maxnamlen, | |
1581 | char **export_path, size_t maxpathlen) | |
1582 | { | |
1583 | if (*dev_name == '[') | |
1584 | return nfs_parse_protected_hostname(dev_name, | |
1585 | hostname, maxnamlen, | |
1586 | export_path, maxpathlen); | |
1587 | ||
1588 | return nfs_parse_simple_hostname(dev_name, | |
1589 | hostname, maxnamlen, | |
1590 | export_path, maxpathlen); | |
1591 | } | |
1592 | ||
f7b422b1 | 1593 | /* |
54ceac45 DH |
1594 | * Validate the NFS2/NFS3 mount data |
1595 | * - fills in the mount root filehandle | |
136d558c CL |
1596 | * |
1597 | * For option strings, user space handles the following behaviors: | |
1598 | * | |
1599 | * + DNS: mapping server host name to IP address ("addr=" option) | |
1600 | * | |
1601 | * + failure mode: how to behave if a mount request can't be handled | |
1602 | * immediately ("fg/bg" option) | |
1603 | * | |
1604 | * + retry: how often to retry a mount request ("retry=" option) | |
1605 | * | |
1606 | * + breaking back: trying proto=udp after proto=tcp, v2 after v3, | |
1607 | * mountproto=tcp after mountproto=udp, and so on | |
f7b422b1 | 1608 | */ |
2283f8d6 TT |
1609 | static int nfs_validate_mount_data(void *options, |
1610 | struct nfs_parsed_mount_data *args, | |
136d558c CL |
1611 | struct nfs_fh *mntfh, |
1612 | const char *dev_name) | |
f7b422b1 | 1613 | { |
2283f8d6 | 1614 | struct nfs_mount_data *data = (struct nfs_mount_data *)options; |
4cfd74fc | 1615 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; |
136d558c | 1616 | |
5df36e78 CL |
1617 | if (data == NULL) |
1618 | goto out_no_data; | |
f7b422b1 | 1619 | |
2283f8d6 TT |
1620 | args->flags = (NFS_MOUNT_VER3 | NFS_MOUNT_TCP); |
1621 | args->rsize = NFS_MAX_FILE_IO_SIZE; | |
1622 | args->wsize = NFS_MAX_FILE_IO_SIZE; | |
0e0cab74 CL |
1623 | args->acregmin = NFS_DEF_ACREGMIN; |
1624 | args->acregmax = NFS_DEF_ACREGMAX; | |
1625 | args->acdirmin = NFS_DEF_ACDIRMIN; | |
1626 | args->acdirmax = NFS_DEF_ACDIRMAX; | |
4cfd74fc CL |
1627 | args->mount_server.port = NFS_UNSPEC_PORT; |
1628 | args->nfs_server.port = NFS_UNSPEC_PORT; | |
0896a725 | 1629 | args->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
dd07c947 | 1630 | args->auth_flavors[0] = RPC_AUTH_UNIX; |
059f90b3 | 1631 | args->auth_flavor_len = 1; |
2283f8d6 | 1632 | |
54ceac45 | 1633 | switch (data->version) { |
5df36e78 CL |
1634 | case 1: |
1635 | data->namlen = 0; | |
1636 | case 2: | |
1637 | data->bsize = 0; | |
1638 | case 3: | |
1639 | if (data->flags & NFS_MOUNT_VER3) | |
1640 | goto out_no_v3; | |
1641 | data->root.size = NFS2_FHSIZE; | |
1642 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
1643 | case 4: | |
1644 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1645 | goto out_no_sec; | |
1646 | case 5: | |
1647 | memset(data->context, 0, sizeof(data->context)); | |
1648 | case 6: | |
b7e24457 TM |
1649 | if (data->flags & NFS_MOUNT_VER3) { |
1650 | if (data->root.size > NFS3_FHSIZE || data->root.size == 0) | |
1651 | goto out_invalid_fh; | |
5df36e78 | 1652 | mntfh->size = data->root.size; |
b7e24457 | 1653 | } else |
5df36e78 CL |
1654 | mntfh->size = NFS2_FHSIZE; |
1655 | ||
5df36e78 CL |
1656 | |
1657 | memcpy(mntfh->data, data->root.data, mntfh->size); | |
1658 | if (mntfh->size < sizeof(mntfh->data)) | |
1659 | memset(mntfh->data + mntfh->size, 0, | |
1660 | sizeof(mntfh->data) - mntfh->size); | |
6e88e061 | 1661 | |
2283f8d6 TT |
1662 | /* |
1663 | * Translate to nfs_parsed_mount_data, which nfs_fill_super | |
1664 | * can deal with. | |
1665 | */ | |
ff3525a5 | 1666 | args->flags = data->flags & NFS_MOUNT_FLAGMASK; |
2283f8d6 TT |
1667 | args->rsize = data->rsize; |
1668 | args->wsize = data->wsize; | |
2283f8d6 TT |
1669 | args->timeo = data->timeo; |
1670 | args->retrans = data->retrans; | |
1671 | args->acregmin = data->acregmin; | |
1672 | args->acregmax = data->acregmax; | |
1673 | args->acdirmin = data->acdirmin; | |
1674 | args->acdirmax = data->acdirmax; | |
4c568017 | 1675 | |
4cfd74fc | 1676 | memcpy(sap, &data->addr, sizeof(data->addr)); |
4c568017 | 1677 | args->nfs_server.addrlen = sizeof(data->addr); |
4cfd74fc | 1678 | if (!nfs_verify_server_address(sap)) |
4c568017 CL |
1679 | goto out_no_address; |
1680 | ||
2283f8d6 | 1681 | if (!(data->flags & NFS_MOUNT_TCP)) |
0896a725 | 1682 | args->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
2283f8d6 TT |
1683 | /* N.B. caller will free nfs_server.hostname in all cases */ |
1684 | args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); | |
1685 | args->namlen = data->namlen; | |
1686 | args->bsize = data->bsize; | |
dd07c947 CL |
1687 | |
1688 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1689 | args->auth_flavors[0] = data->pseudoflavor; | |
63649bd7 CG |
1690 | if (!args->nfs_server.hostname) |
1691 | goto out_nomem; | |
f9c3a380 EP |
1692 | |
1693 | /* | |
1694 | * The legacy version 6 binary mount data from userspace has a | |
1695 | * field used only to transport selinux information into the | |
1696 | * the kernel. To continue to support that functionality we | |
1697 | * have a touch of selinux knowledge here in the NFS code. The | |
1698 | * userspace code converted context=blah to just blah so we are | |
1699 | * converting back to the full string selinux understands. | |
1700 | */ | |
1701 | if (data->context[0]){ | |
1702 | #ifdef CONFIG_SECURITY_SELINUX | |
1703 | int rc; | |
1704 | char *opts_str = kmalloc(sizeof(data->context) + 8, GFP_KERNEL); | |
1705 | if (!opts_str) | |
1706 | return -ENOMEM; | |
1707 | strcpy(opts_str, "context="); | |
1708 | data->context[NFS_MAX_CONTEXT_LEN] = '\0'; | |
1709 | strcat(opts_str, &data->context[0]); | |
1710 | rc = security_sb_parse_opts_str(opts_str, &args->lsm_opts); | |
1711 | kfree(opts_str); | |
1712 | if (rc) | |
1713 | return rc; | |
1714 | #else | |
1715 | return -EINVAL; | |
1716 | #endif | |
1717 | } | |
1718 | ||
5df36e78 | 1719 | break; |
136d558c | 1720 | default: { |
136d558c | 1721 | int status; |
136d558c | 1722 | |
2283f8d6 TT |
1723 | if (nfs_parse_mount_options((char *)options, args) == 0) |
1724 | return -EINVAL; | |
136d558c | 1725 | |
4cfd74fc | 1726 | if (!nfs_verify_server_address(sap)) |
6e88e061 CL |
1727 | goto out_no_address; |
1728 | ||
4cfd74fc | 1729 | nfs_set_default_port(sap, args->nfs_server.port, 0); |
ed596a8a | 1730 | |
259875ef TM |
1731 | nfs_set_mount_transport_protocol(args); |
1732 | ||
dc045898 CL |
1733 | status = nfs_parse_devname(dev_name, |
1734 | &args->nfs_server.hostname, | |
1735 | PAGE_SIZE, | |
1736 | &args->nfs_server.export_path, | |
1737 | NFS_MAXPATHLEN); | |
1738 | if (!status) | |
1739 | status = nfs_try_mount(args, mntfh); | |
136d558c | 1740 | |
dc045898 CL |
1741 | kfree(args->nfs_server.export_path); |
1742 | args->nfs_server.export_path = NULL; | |
136d558c | 1743 | |
136d558c | 1744 | if (status) |
fdc6e2c8 | 1745 | return status; |
136d558c | 1746 | |
136d558c CL |
1747 | break; |
1748 | } | |
f7b422b1 | 1749 | } |
54ceac45 DH |
1750 | |
1751 | #ifndef CONFIG_NFS_V3 | |
2283f8d6 | 1752 | if (args->flags & NFS_MOUNT_VER3) |
5df36e78 CL |
1753 | goto out_v3_not_compiled; |
1754 | #endif /* !CONFIG_NFS_V3 */ | |
f7b422b1 | 1755 | |
5df36e78 | 1756 | return 0; |
f7b422b1 | 1757 | |
5df36e78 CL |
1758 | out_no_data: |
1759 | dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); | |
1760 | return -EINVAL; | |
54ceac45 | 1761 | |
5df36e78 CL |
1762 | out_no_v3: |
1763 | dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", | |
1764 | data->version); | |
1765 | return -EINVAL; | |
f7b422b1 | 1766 | |
5df36e78 CL |
1767 | out_no_sec: |
1768 | dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); | |
1769 | return -EINVAL; | |
1770 | ||
5df36e78 CL |
1771 | #ifndef CONFIG_NFS_V3 |
1772 | out_v3_not_compiled: | |
1773 | dfprintk(MOUNT, "NFS: NFSv3 is not compiled into kernel\n"); | |
1774 | return -EPROTONOSUPPORT; | |
1775 | #endif /* !CONFIG_NFS_V3 */ | |
1776 | ||
63649bd7 CG |
1777 | out_nomem: |
1778 | dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); | |
1779 | return -ENOMEM; | |
1780 | ||
5df36e78 CL |
1781 | out_no_address: |
1782 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); | |
1783 | return -EINVAL; | |
1784 | ||
1785 | out_invalid_fh: | |
1786 | dfprintk(MOUNT, "NFS: invalid root filehandle\n"); | |
1787 | return -EINVAL; | |
f7b422b1 DH |
1788 | } |
1789 | ||
48b605f8 JL |
1790 | static int |
1791 | nfs_compare_remount_data(struct nfs_server *nfss, | |
1792 | struct nfs_parsed_mount_data *data) | |
1793 | { | |
1794 | if (data->flags != nfss->flags || | |
1795 | data->rsize != nfss->rsize || | |
1796 | data->wsize != nfss->wsize || | |
1797 | data->retrans != nfss->client->cl_timeout->to_retries || | |
1798 | data->auth_flavors[0] != nfss->client->cl_auth->au_flavor || | |
1799 | data->acregmin != nfss->acregmin / HZ || | |
1800 | data->acregmax != nfss->acregmax / HZ || | |
1801 | data->acdirmin != nfss->acdirmin / HZ || | |
1802 | data->acdirmax != nfss->acdirmax / HZ || | |
1803 | data->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) || | |
1804 | data->nfs_server.addrlen != nfss->nfs_client->cl_addrlen || | |
1805 | memcmp(&data->nfs_server.address, &nfss->nfs_client->cl_addr, | |
1806 | data->nfs_server.addrlen) != 0) | |
1807 | return -EINVAL; | |
1808 | ||
1809 | return 0; | |
1810 | } | |
1811 | ||
1812 | static int | |
1813 | nfs_remount(struct super_block *sb, int *flags, char *raw_data) | |
1814 | { | |
1815 | int error; | |
1816 | struct nfs_server *nfss = sb->s_fs_info; | |
1817 | struct nfs_parsed_mount_data *data; | |
1818 | struct nfs_mount_data *options = (struct nfs_mount_data *)raw_data; | |
1819 | struct nfs4_mount_data *options4 = (struct nfs4_mount_data *)raw_data; | |
cd100725 | 1820 | u32 nfsvers = nfss->nfs_client->rpc_ops->version; |
48b605f8 JL |
1821 | |
1822 | /* | |
1823 | * Userspace mount programs that send binary options generally send | |
1824 | * them populated with default values. We have no way to know which | |
1825 | * ones were explicitly specified. Fall back to legacy behavior and | |
1826 | * just return success. | |
1827 | */ | |
31c94469 MZ |
1828 | if ((nfsvers == 4 && (!options4 || options4->version == 1)) || |
1829 | (nfsvers <= 3 && (!options || (options->version >= 1 && | |
1830 | options->version <= 6)))) | |
48b605f8 JL |
1831 | return 0; |
1832 | ||
1833 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
1834 | if (data == NULL) | |
1835 | return -ENOMEM; | |
1836 | ||
337eb00a | 1837 | lock_kernel(); |
48b605f8 JL |
1838 | /* fill out struct with values from existing mount */ |
1839 | data->flags = nfss->flags; | |
1840 | data->rsize = nfss->rsize; | |
1841 | data->wsize = nfss->wsize; | |
1842 | data->retrans = nfss->client->cl_timeout->to_retries; | |
1843 | data->auth_flavors[0] = nfss->client->cl_auth->au_flavor; | |
1844 | data->acregmin = nfss->acregmin / HZ; | |
1845 | data->acregmax = nfss->acregmax / HZ; | |
1846 | data->acdirmin = nfss->acdirmin / HZ; | |
1847 | data->acdirmax = nfss->acdirmax / HZ; | |
1848 | data->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; | |
1849 | data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; | |
1850 | memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr, | |
1851 | data->nfs_server.addrlen); | |
1852 | ||
1853 | /* overwrite those values with any that were specified */ | |
1854 | error = nfs_parse_mount_options((char *)options, data); | |
1855 | if (error < 0) | |
1856 | goto out; | |
1857 | ||
1858 | /* compare new mount options with old ones */ | |
1859 | error = nfs_compare_remount_data(nfss, data); | |
1860 | out: | |
1861 | kfree(data); | |
337eb00a | 1862 | unlock_kernel(); |
48b605f8 JL |
1863 | return error; |
1864 | } | |
1865 | ||
f7b422b1 | 1866 | /* |
54ceac45 | 1867 | * Initialise the common bits of the superblock |
f7b422b1 | 1868 | */ |
54ceac45 | 1869 | static inline void nfs_initialise_sb(struct super_block *sb) |
f7b422b1 | 1870 | { |
54ceac45 | 1871 | struct nfs_server *server = NFS_SB(sb); |
5006a76c | 1872 | |
54ceac45 | 1873 | sb->s_magic = NFS_SUPER_MAGIC; |
f7b422b1 | 1874 | |
54ceac45 DH |
1875 | /* We probably want something more informative here */ |
1876 | snprintf(sb->s_id, sizeof(sb->s_id), | |
1877 | "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev)); | |
5006a76c | 1878 | |
54ceac45 DH |
1879 | if (sb->s_blocksize == 0) |
1880 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
1881 | &sb->s_blocksize_bits); | |
f7b422b1 | 1882 | |
54ceac45 DH |
1883 | if (server->flags & NFS_MOUNT_NOAC) |
1884 | sb->s_flags |= MS_SYNCHRONOUS; | |
f7b422b1 | 1885 | |
54ceac45 | 1886 | nfs_super_set_maxbytes(sb, server->maxfilesize); |
f7b422b1 DH |
1887 | } |
1888 | ||
1889 | /* | |
54ceac45 | 1890 | * Finish setting up an NFS2/3 superblock |
f7b422b1 | 1891 | */ |
2283f8d6 TT |
1892 | static void nfs_fill_super(struct super_block *sb, |
1893 | struct nfs_parsed_mount_data *data) | |
f7b422b1 DH |
1894 | { |
1895 | struct nfs_server *server = NFS_SB(sb); | |
5006a76c | 1896 | |
54ceac45 DH |
1897 | sb->s_blocksize_bits = 0; |
1898 | sb->s_blocksize = 0; | |
1899 | if (data->bsize) | |
1900 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); | |
f7b422b1 | 1901 | |
54ceac45 DH |
1902 | if (server->flags & NFS_MOUNT_VER3) { |
1903 | /* The VFS shouldn't apply the umask to mode bits. We will do | |
1904 | * so ourselves when necessary. | |
1905 | */ | |
1906 | sb->s_flags |= MS_POSIXACL; | |
1907 | sb->s_time_gran = 1; | |
816724e6 | 1908 | } |
54ceac45 DH |
1909 | |
1910 | sb->s_op = &nfs_sops; | |
1911 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1912 | } |
1913 | ||
1914 | /* | |
54ceac45 | 1915 | * Finish setting up a cloned NFS2/3 superblock |
f7b422b1 | 1916 | */ |
54ceac45 DH |
1917 | static void nfs_clone_super(struct super_block *sb, |
1918 | const struct super_block *old_sb) | |
f7b422b1 | 1919 | { |
54ceac45 DH |
1920 | struct nfs_server *server = NFS_SB(sb); |
1921 | ||
1922 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; | |
1923 | sb->s_blocksize = old_sb->s_blocksize; | |
1924 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 1925 | |
f7b422b1 | 1926 | if (server->flags & NFS_MOUNT_VER3) { |
54ceac45 DH |
1927 | /* The VFS shouldn't apply the umask to mode bits. We will do |
1928 | * so ourselves when necessary. | |
f7b422b1 DH |
1929 | */ |
1930 | sb->s_flags |= MS_POSIXACL; | |
f7b422b1 | 1931 | sb->s_time_gran = 1; |
f7b422b1 DH |
1932 | } |
1933 | ||
54ceac45 DH |
1934 | sb->s_op = old_sb->s_op; |
1935 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1936 | } |
1937 | ||
275a5d24 TM |
1938 | static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags) |
1939 | { | |
1940 | const struct nfs_server *a = s->s_fs_info; | |
1941 | const struct rpc_clnt *clnt_a = a->client; | |
1942 | const struct rpc_clnt *clnt_b = b->client; | |
1943 | ||
1944 | if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK)) | |
1945 | goto Ebusy; | |
1946 | if (a->nfs_client != b->nfs_client) | |
1947 | goto Ebusy; | |
1948 | if (a->flags != b->flags) | |
1949 | goto Ebusy; | |
1950 | if (a->wsize != b->wsize) | |
1951 | goto Ebusy; | |
1952 | if (a->rsize != b->rsize) | |
1953 | goto Ebusy; | |
1954 | if (a->acregmin != b->acregmin) | |
1955 | goto Ebusy; | |
1956 | if (a->acregmax != b->acregmax) | |
1957 | goto Ebusy; | |
1958 | if (a->acdirmin != b->acdirmin) | |
1959 | goto Ebusy; | |
1960 | if (a->acdirmax != b->acdirmax) | |
1961 | goto Ebusy; | |
1962 | if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) | |
1963 | goto Ebusy; | |
e89a5a43 | 1964 | return 1; |
275a5d24 | 1965 | Ebusy: |
e89a5a43 TM |
1966 | return 0; |
1967 | } | |
1968 | ||
1969 | struct nfs_sb_mountdata { | |
1970 | struct nfs_server *server; | |
1971 | int mntflags; | |
1972 | }; | |
1973 | ||
1974 | static int nfs_set_super(struct super_block *s, void *data) | |
1975 | { | |
1976 | struct nfs_sb_mountdata *sb_mntdata = data; | |
1977 | struct nfs_server *server = sb_mntdata->server; | |
1978 | int ret; | |
1979 | ||
1980 | s->s_flags = sb_mntdata->mntflags; | |
1981 | s->s_fs_info = server; | |
1982 | ret = set_anon_super(s, server); | |
1983 | if (ret == 0) | |
1984 | server->s_dev = s->s_dev; | |
1985 | return ret; | |
1986 | } | |
1987 | ||
fd00a8ff CL |
1988 | static int nfs_compare_super_address(struct nfs_server *server1, |
1989 | struct nfs_server *server2) | |
1990 | { | |
1991 | struct sockaddr *sap1, *sap2; | |
1992 | ||
1993 | sap1 = (struct sockaddr *)&server1->nfs_client->cl_addr; | |
1994 | sap2 = (struct sockaddr *)&server2->nfs_client->cl_addr; | |
1995 | ||
1996 | if (sap1->sa_family != sap2->sa_family) | |
1997 | return 0; | |
1998 | ||
1999 | switch (sap1->sa_family) { | |
2000 | case AF_INET: { | |
2001 | struct sockaddr_in *sin1 = (struct sockaddr_in *)sap1; | |
2002 | struct sockaddr_in *sin2 = (struct sockaddr_in *)sap2; | |
2003 | if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) | |
2004 | return 0; | |
2005 | if (sin1->sin_port != sin2->sin_port) | |
2006 | return 0; | |
2007 | break; | |
2008 | } | |
2009 | case AF_INET6: { | |
2010 | struct sockaddr_in6 *sin1 = (struct sockaddr_in6 *)sap1; | |
2011 | struct sockaddr_in6 *sin2 = (struct sockaddr_in6 *)sap2; | |
2012 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) | |
2013 | return 0; | |
2014 | if (sin1->sin6_port != sin2->sin6_port) | |
2015 | return 0; | |
2016 | break; | |
2017 | } | |
2018 | default: | |
2019 | return 0; | |
2020 | } | |
2021 | ||
2022 | return 1; | |
2023 | } | |
2024 | ||
e89a5a43 TM |
2025 | static int nfs_compare_super(struct super_block *sb, void *data) |
2026 | { | |
2027 | struct nfs_sb_mountdata *sb_mntdata = data; | |
2028 | struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb); | |
2029 | int mntflags = sb_mntdata->mntflags; | |
2030 | ||
fd00a8ff | 2031 | if (!nfs_compare_super_address(old, server)) |
e89a5a43 TM |
2032 | return 0; |
2033 | /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */ | |
2034 | if (old->flags & NFS_MOUNT_UNSHARED) | |
2035 | return 0; | |
2036 | if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0) | |
2037 | return 0; | |
2038 | return nfs_compare_mount_options(sb, server, mntflags); | |
275a5d24 TM |
2039 | } |
2040 | ||
fa799759 MS |
2041 | static int nfs_bdi_register(struct nfs_server *server) |
2042 | { | |
2043 | return bdi_register_dev(&server->backing_dev_info, server->s_dev); | |
2044 | } | |
2045 | ||
816724e6 TM |
2046 | static int nfs_get_sb(struct file_system_type *fs_type, |
2047 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
f7b422b1 | 2048 | { |
f7b422b1 DH |
2049 | struct nfs_server *server = NULL; |
2050 | struct super_block *s; | |
33852a1f TM |
2051 | struct nfs_parsed_mount_data *data; |
2052 | struct nfs_fh *mntfh; | |
54ceac45 | 2053 | struct dentry *mntroot; |
75180df2 | 2054 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2055 | struct nfs_sb_mountdata sb_mntdata = { |
2056 | .mntflags = flags, | |
2057 | }; | |
33852a1f TM |
2058 | int error = -ENOMEM; |
2059 | ||
2060 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2061 | mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL); | |
2062 | if (data == NULL || mntfh == NULL) | |
2063 | goto out_free_fh; | |
f7b422b1 | 2064 | |
33852a1f | 2065 | security_init_mnt_opts(&data->lsm_opts); |
f9c3a380 | 2066 | |
54ceac45 | 2067 | /* Validate the mount data */ |
33852a1f | 2068 | error = nfs_validate_mount_data(raw_data, data, mntfh, dev_name); |
54ceac45 | 2069 | if (error < 0) |
0655960f | 2070 | goto out; |
f7b422b1 | 2071 | |
54ceac45 | 2072 | /* Get a volume representation */ |
33852a1f | 2073 | server = nfs_create_server(data, mntfh); |
54ceac45 DH |
2074 | if (IS_ERR(server)) { |
2075 | error = PTR_ERR(server); | |
0655960f | 2076 | goto out; |
f7b422b1 | 2077 | } |
e89a5a43 | 2078 | sb_mntdata.server = server; |
f7b422b1 | 2079 | |
75180df2 TM |
2080 | if (server->flags & NFS_MOUNT_UNSHARED) |
2081 | compare_super = NULL; | |
2082 | ||
54ceac45 | 2083 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 2084 | s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
2085 | if (IS_ERR(s)) { |
2086 | error = PTR_ERR(s); | |
54ceac45 | 2087 | goto out_err_nosb; |
816724e6 TM |
2088 | } |
2089 | ||
54ceac45 DH |
2090 | if (s->s_fs_info != server) { |
2091 | nfs_free_server(server); | |
2092 | server = NULL; | |
fa799759 MS |
2093 | } else { |
2094 | error = nfs_bdi_register(server); | |
2095 | if (error) | |
2096 | goto error_splat_super; | |
54ceac45 | 2097 | } |
f7b422b1 | 2098 | |
54ceac45 DH |
2099 | if (!s->s_root) { |
2100 | /* initial superblock/root creation */ | |
33852a1f | 2101 | nfs_fill_super(s, data); |
08734048 | 2102 | nfs_fscache_get_super_cookie(s, data); |
54ceac45 | 2103 | } |
f7b422b1 | 2104 | |
33852a1f | 2105 | mntroot = nfs_get_root(s, mntfh); |
54ceac45 DH |
2106 | if (IS_ERR(mntroot)) { |
2107 | error = PTR_ERR(mntroot); | |
2108 | goto error_splat_super; | |
f7b422b1 | 2109 | } |
816724e6 | 2110 | |
33852a1f | 2111 | error = security_sb_set_mnt_opts(s, &data->lsm_opts); |
f9c3a380 EP |
2112 | if (error) |
2113 | goto error_splat_root; | |
2114 | ||
54ceac45 DH |
2115 | s->s_flags |= MS_ACTIVE; |
2116 | mnt->mnt_sb = s; | |
2117 | mnt->mnt_root = mntroot; | |
0655960f CL |
2118 | error = 0; |
2119 | ||
2120 | out: | |
33852a1f TM |
2121 | kfree(data->nfs_server.hostname); |
2122 | kfree(data->mount_server.hostname); | |
08734048 | 2123 | kfree(data->fscache_uniq); |
33852a1f TM |
2124 | security_free_mnt_opts(&data->lsm_opts); |
2125 | out_free_fh: | |
2126 | kfree(mntfh); | |
2127 | kfree(data); | |
0655960f | 2128 | return error; |
816724e6 | 2129 | |
54ceac45 DH |
2130 | out_err_nosb: |
2131 | nfs_free_server(server); | |
0655960f | 2132 | goto out; |
54ceac45 | 2133 | |
f9c3a380 EP |
2134 | error_splat_root: |
2135 | dput(mntroot); | |
54ceac45 | 2136 | error_splat_super: |
6f5bbff9 | 2137 | deactivate_locked_super(s); |
0655960f | 2138 | goto out; |
f7b422b1 DH |
2139 | } |
2140 | ||
54ceac45 DH |
2141 | /* |
2142 | * Destroy an NFS2/3 superblock | |
2143 | */ | |
f7b422b1 DH |
2144 | static void nfs_kill_super(struct super_block *s) |
2145 | { | |
2146 | struct nfs_server *server = NFS_SB(s); | |
2147 | ||
fa799759 | 2148 | bdi_unregister(&server->backing_dev_info); |
f7b422b1 | 2149 | kill_anon_super(s); |
08734048 | 2150 | nfs_fscache_release_super_cookie(s); |
54ceac45 | 2151 | nfs_free_server(server); |
f7b422b1 DH |
2152 | } |
2153 | ||
54ceac45 DH |
2154 | /* |
2155 | * Clone an NFS2/3 server record on xdev traversal (FSID-change) | |
2156 | */ | |
2157 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags, | |
2158 | const char *dev_name, void *raw_data, | |
2159 | struct vfsmount *mnt) | |
f7b422b1 DH |
2160 | { |
2161 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
2162 | struct super_block *s; |
2163 | struct nfs_server *server; | |
2164 | struct dentry *mntroot; | |
75180df2 | 2165 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2166 | struct nfs_sb_mountdata sb_mntdata = { |
2167 | .mntflags = flags, | |
2168 | }; | |
54ceac45 | 2169 | int error; |
f7b422b1 | 2170 | |
54ceac45 | 2171 | dprintk("--> nfs_xdev_get_sb()\n"); |
f7b422b1 | 2172 | |
54ceac45 DH |
2173 | /* create a new volume representation */ |
2174 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
2175 | if (IS_ERR(server)) { | |
2176 | error = PTR_ERR(server); | |
2177 | goto out_err_noserver; | |
2178 | } | |
e89a5a43 | 2179 | sb_mntdata.server = server; |
8fa5c000 | 2180 | |
75180df2 TM |
2181 | if (server->flags & NFS_MOUNT_UNSHARED) |
2182 | compare_super = NULL; | |
2183 | ||
54ceac45 | 2184 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 2185 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2186 | if (IS_ERR(s)) { |
2187 | error = PTR_ERR(s); | |
2188 | goto out_err_nosb; | |
2189 | } | |
5006a76c | 2190 | |
54ceac45 DH |
2191 | if (s->s_fs_info != server) { |
2192 | nfs_free_server(server); | |
2193 | server = NULL; | |
fa799759 MS |
2194 | } else { |
2195 | error = nfs_bdi_register(server); | |
2196 | if (error) | |
2197 | goto error_splat_super; | |
f7b422b1 | 2198 | } |
24c8dbbb | 2199 | |
54ceac45 DH |
2200 | if (!s->s_root) { |
2201 | /* initial superblock/root creation */ | |
54ceac45 DH |
2202 | nfs_clone_super(s, data->sb); |
2203 | } | |
f7b422b1 | 2204 | |
54ceac45 DH |
2205 | mntroot = nfs_get_root(s, data->fh); |
2206 | if (IS_ERR(mntroot)) { | |
2207 | error = PTR_ERR(mntroot); | |
2208 | goto error_splat_super; | |
f7b422b1 | 2209 | } |
e9cc6c23 | 2210 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
4c1fe2f7 NB |
2211 | dput(mntroot); |
2212 | error = -ESTALE; | |
2213 | goto error_splat_super; | |
2214 | } | |
f7b422b1 | 2215 | |
54ceac45 DH |
2216 | s->s_flags |= MS_ACTIVE; |
2217 | mnt->mnt_sb = s; | |
2218 | mnt->mnt_root = mntroot; | |
f7b422b1 | 2219 | |
f9c3a380 EP |
2220 | /* clone any lsm security options from the parent to the new sb */ |
2221 | security_sb_clone_mnt_opts(data->sb, s); | |
2222 | ||
54ceac45 DH |
2223 | dprintk("<-- nfs_xdev_get_sb() = 0\n"); |
2224 | return 0; | |
24c8dbbb | 2225 | |
54ceac45 DH |
2226 | out_err_nosb: |
2227 | nfs_free_server(server); | |
2228 | out_err_noserver: | |
2229 | dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error); | |
2230 | return error; | |
f7b422b1 | 2231 | |
54ceac45 | 2232 | error_splat_super: |
6f5bbff9 | 2233 | deactivate_locked_super(s); |
54ceac45 DH |
2234 | dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error); |
2235 | return error; | |
f7b422b1 DH |
2236 | } |
2237 | ||
54ceac45 DH |
2238 | #ifdef CONFIG_NFS_V4 |
2239 | ||
f7b422b1 | 2240 | /* |
54ceac45 | 2241 | * Finish setting up a cloned NFS4 superblock |
f7b422b1 | 2242 | */ |
54ceac45 DH |
2243 | static void nfs4_clone_super(struct super_block *sb, |
2244 | const struct super_block *old_sb) | |
f7b422b1 | 2245 | { |
54ceac45 DH |
2246 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; |
2247 | sb->s_blocksize = old_sb->s_blocksize; | |
2248 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 2249 | sb->s_time_gran = 1; |
54ceac45 DH |
2250 | sb->s_op = old_sb->s_op; |
2251 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
2252 | } |
2253 | ||
54ceac45 DH |
2254 | /* |
2255 | * Set up an NFS4 superblock | |
2256 | */ | |
2257 | static void nfs4_fill_super(struct super_block *sb) | |
f7b422b1 | 2258 | { |
54ceac45 DH |
2259 | sb->s_time_gran = 1; |
2260 | sb->s_op = &nfs4_sops; | |
2261 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
2262 | } |
2263 | ||
01c3f052 TM |
2264 | static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) |
2265 | { | |
2266 | args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3); | |
2267 | } | |
2268 | ||
7630c852 CL |
2269 | static int nfs4_validate_text_mount_data(void *options, |
2270 | struct nfs_parsed_mount_data *args, | |
2271 | const char *dev_name) | |
2272 | { | |
2273 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; | |
2274 | ||
2275 | nfs_set_default_port(sap, args->nfs_server.port, NFS_PORT); | |
2276 | ||
2277 | nfs_validate_transport_protocol(args); | |
2278 | ||
2279 | nfs4_validate_mount_flags(args); | |
2280 | ||
2281 | if (args->auth_flavor_len > 1) { | |
2282 | dfprintk(MOUNT, | |
2283 | "NFS4: Too many RPC auth flavours specified\n"); | |
2284 | return -EINVAL; | |
2285 | } | |
2286 | ||
2287 | if (args->client_address == NULL) { | |
2288 | dfprintk(MOUNT, | |
2289 | "NFS4: mount program didn't pass callback address\n"); | |
2290 | return -EINVAL; | |
2291 | } | |
2292 | ||
2293 | return nfs_parse_devname(dev_name, | |
2294 | &args->nfs_server.hostname, | |
2295 | NFS4_MAXNAMLEN, | |
2296 | &args->nfs_server.export_path, | |
2297 | NFS4_MAXPATHLEN); | |
2298 | } | |
2299 | ||
f0768ebd CL |
2300 | /* |
2301 | * Validate NFSv4 mount options | |
2302 | */ | |
91ea40b9 TT |
2303 | static int nfs4_validate_mount_data(void *options, |
2304 | struct nfs_parsed_mount_data *args, | |
2305 | const char *dev_name) | |
f0768ebd | 2306 | { |
4cfd74fc | 2307 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; |
91ea40b9 | 2308 | struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; |
f0768ebd CL |
2309 | char *c; |
2310 | ||
2311 | if (data == NULL) | |
2312 | goto out_no_data; | |
2313 | ||
91ea40b9 TT |
2314 | args->rsize = NFS_MAX_FILE_IO_SIZE; |
2315 | args->wsize = NFS_MAX_FILE_IO_SIZE; | |
0e0cab74 CL |
2316 | args->acregmin = NFS_DEF_ACREGMIN; |
2317 | args->acregmax = NFS_DEF_ACREGMAX; | |
2318 | args->acdirmin = NFS_DEF_ACDIRMIN; | |
2319 | args->acdirmax = NFS_DEF_ACDIRMAX; | |
4cfd74fc | 2320 | args->nfs_server.port = NFS_UNSPEC_PORT; |
6738b251 | 2321 | args->auth_flavors[0] = RPC_AUTH_UNIX; |
059f90b3 | 2322 | args->auth_flavor_len = 1; |
3fd5be9e | 2323 | args->minorversion = 0; |
91ea40b9 | 2324 | |
f0768ebd CL |
2325 | switch (data->version) { |
2326 | case 1: | |
4c568017 CL |
2327 | if (data->host_addrlen > sizeof(args->nfs_server.address)) |
2328 | goto out_no_address; | |
2329 | if (data->host_addrlen == 0) | |
f0768ebd | 2330 | goto out_no_address; |
4c568017 | 2331 | args->nfs_server.addrlen = data->host_addrlen; |
4cfd74fc | 2332 | if (copy_from_user(sap, data->host_addr, data->host_addrlen)) |
f0768ebd | 2333 | return -EFAULT; |
4cfd74fc | 2334 | if (!nfs_verify_server_address(sap)) |
f0768ebd CL |
2335 | goto out_no_address; |
2336 | ||
6738b251 CL |
2337 | if (data->auth_flavourlen) { |
2338 | if (data->auth_flavourlen > 1) | |
2339 | goto out_inval_auth; | |
20c71f5e | 2340 | if (copy_from_user(&args->auth_flavors[0], |
91ea40b9 | 2341 | data->auth_flavours, |
20c71f5e | 2342 | sizeof(args->auth_flavors[0]))) |
f0768ebd | 2343 | return -EFAULT; |
f0768ebd CL |
2344 | } |
2345 | ||
2346 | c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); | |
2347 | if (IS_ERR(c)) | |
2348 | return PTR_ERR(c); | |
91ea40b9 | 2349 | args->nfs_server.hostname = c; |
f0768ebd CL |
2350 | |
2351 | c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); | |
2352 | if (IS_ERR(c)) | |
2353 | return PTR_ERR(c); | |
91ea40b9 TT |
2354 | args->nfs_server.export_path = c; |
2355 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); | |
f0768ebd CL |
2356 | |
2357 | c = strndup_user(data->client_addr.data, 16); | |
2358 | if (IS_ERR(c)) | |
2359 | return PTR_ERR(c); | |
91ea40b9 TT |
2360 | args->client_address = c; |
2361 | ||
2362 | /* | |
2363 | * Translate to nfs_parsed_mount_data, which nfs4_fill_super | |
2364 | * can deal with. | |
2365 | */ | |
2366 | ||
2367 | args->flags = data->flags & NFS4_MOUNT_FLAGMASK; | |
2368 | args->rsize = data->rsize; | |
2369 | args->wsize = data->wsize; | |
2370 | args->timeo = data->timeo; | |
2371 | args->retrans = data->retrans; | |
2372 | args->acregmin = data->acregmin; | |
2373 | args->acregmax = data->acregmax; | |
2374 | args->acdirmin = data->acdirmin; | |
2375 | args->acdirmax = data->acdirmax; | |
2376 | args->nfs_server.protocol = data->proto; | |
259875ef | 2377 | nfs_validate_transport_protocol(args); |
f0768ebd CL |
2378 | |
2379 | break; | |
7630c852 | 2380 | default: |
91ea40b9 | 2381 | if (nfs_parse_mount_options((char *)options, args) == 0) |
80071225 CL |
2382 | return -EINVAL; |
2383 | ||
4cfd74fc | 2384 | if (!nfs_verify_server_address(sap)) |
80071225 | 2385 | return -EINVAL; |
dc045898 | 2386 | |
7630c852 | 2387 | return nfs4_validate_text_mount_data(options, args, dev_name); |
f0768ebd CL |
2388 | } |
2389 | ||
2390 | return 0; | |
2391 | ||
2392 | out_no_data: | |
2393 | dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); | |
2394 | return -EINVAL; | |
2395 | ||
2396 | out_inval_auth: | |
2397 | dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", | |
2398 | data->auth_flavourlen); | |
2399 | return -EINVAL; | |
2400 | ||
2401 | out_no_address: | |
2402 | dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); | |
2403 | return -EINVAL; | |
f0768ebd CL |
2404 | } |
2405 | ||
54ceac45 | 2406 | /* |
c02d7adf | 2407 | * Get the superblock for the NFS4 root partition |
54ceac45 | 2408 | */ |
c02d7adf | 2409 | static int nfs4_remote_get_sb(struct file_system_type *fs_type, |
816724e6 | 2410 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) |
f7b422b1 | 2411 | { |
c02d7adf | 2412 | struct nfs_parsed_mount_data *data = raw_data; |
54ceac45 DH |
2413 | struct super_block *s; |
2414 | struct nfs_server *server; | |
33852a1f | 2415 | struct nfs_fh *mntfh; |
54ceac45 | 2416 | struct dentry *mntroot; |
75180df2 | 2417 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2418 | struct nfs_sb_mountdata sb_mntdata = { |
2419 | .mntflags = flags, | |
2420 | }; | |
33852a1f TM |
2421 | int error = -ENOMEM; |
2422 | ||
33852a1f TM |
2423 | mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL); |
2424 | if (data == NULL || mntfh == NULL) | |
2425 | goto out_free_fh; | |
f7b422b1 | 2426 | |
33852a1f | 2427 | security_init_mnt_opts(&data->lsm_opts); |
f9c3a380 | 2428 | |
54ceac45 | 2429 | /* Get a volume representation */ |
33852a1f | 2430 | server = nfs4_create_server(data, mntfh); |
54ceac45 DH |
2431 | if (IS_ERR(server)) { |
2432 | error = PTR_ERR(server); | |
29eb981a | 2433 | goto out; |
f7b422b1 | 2434 | } |
e89a5a43 | 2435 | sb_mntdata.server = server; |
f7b422b1 | 2436 | |
75180df2 TM |
2437 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2438 | compare_super = NULL; | |
2439 | ||
54ceac45 | 2440 | /* Get a superblock - note that we may end up sharing one that already exists */ |
c02d7adf | 2441 | s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
2442 | if (IS_ERR(s)) { |
2443 | error = PTR_ERR(s); | |
f7b422b1 | 2444 | goto out_free; |
816724e6 TM |
2445 | } |
2446 | ||
5dd3177a TM |
2447 | if (s->s_fs_info != server) { |
2448 | nfs_free_server(server); | |
2449 | server = NULL; | |
fa799759 MS |
2450 | } else { |
2451 | error = nfs_bdi_register(server); | |
2452 | if (error) | |
2453 | goto error_splat_super; | |
5dd3177a TM |
2454 | } |
2455 | ||
54ceac45 DH |
2456 | if (!s->s_root) { |
2457 | /* initial superblock/root creation */ | |
54ceac45 | 2458 | nfs4_fill_super(s); |
08734048 | 2459 | nfs_fscache_get_super_cookie(s, data); |
54ceac45 | 2460 | } |
f7b422b1 | 2461 | |
33852a1f | 2462 | mntroot = nfs4_get_root(s, mntfh); |
54ceac45 DH |
2463 | if (IS_ERR(mntroot)) { |
2464 | error = PTR_ERR(mntroot); | |
2465 | goto error_splat_super; | |
f7b422b1 | 2466 | } |
54ceac45 | 2467 | |
33852a1f | 2468 | error = security_sb_set_mnt_opts(s, &data->lsm_opts); |
46c8ac74 EP |
2469 | if (error) |
2470 | goto error_splat_root; | |
2471 | ||
f7b422b1 | 2472 | s->s_flags |= MS_ACTIVE; |
54ceac45 DH |
2473 | mnt->mnt_sb = s; |
2474 | mnt->mnt_root = mntroot; | |
29eb981a CL |
2475 | error = 0; |
2476 | ||
2477 | out: | |
33852a1f TM |
2478 | security_free_mnt_opts(&data->lsm_opts); |
2479 | out_free_fh: | |
2480 | kfree(mntfh); | |
29eb981a | 2481 | return error; |
54ceac45 | 2482 | |
f7b422b1 | 2483 | out_free: |
54ceac45 | 2484 | nfs_free_server(server); |
29eb981a | 2485 | goto out; |
54ceac45 | 2486 | |
46c8ac74 EP |
2487 | error_splat_root: |
2488 | dput(mntroot); | |
54ceac45 | 2489 | error_splat_super: |
6f5bbff9 | 2490 | deactivate_locked_super(s); |
29eb981a | 2491 | goto out; |
f7b422b1 DH |
2492 | } |
2493 | ||
c02d7adf TM |
2494 | static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type, |
2495 | int flags, void *data, const char *hostname) | |
2496 | { | |
2497 | struct vfsmount *root_mnt; | |
2498 | char *root_devname; | |
2499 | size_t len; | |
2500 | ||
2501 | len = strlen(hostname) + 3; | |
2502 | root_devname = kmalloc(len, GFP_KERNEL); | |
2503 | if (root_devname == NULL) | |
2504 | return ERR_PTR(-ENOMEM); | |
2505 | snprintf(root_devname, len, "%s:/", hostname); | |
2506 | root_mnt = vfs_kern_mount(fs_type, flags, root_devname, data); | |
2507 | kfree(root_devname); | |
2508 | return root_mnt; | |
2509 | } | |
2510 | ||
b88f8a54 TM |
2511 | static void nfs_fix_devname(const struct path *path, struct vfsmount *mnt) |
2512 | { | |
2513 | char *page = (char *) __get_free_page(GFP_KERNEL); | |
2514 | char *devname, *tmp; | |
2515 | ||
2516 | if (page == NULL) | |
2517 | return; | |
2518 | devname = nfs_path(path->mnt->mnt_devname, | |
2519 | path->mnt->mnt_root, path->dentry, | |
2520 | page, PAGE_SIZE); | |
2521 | if (devname == NULL) | |
2522 | goto out_freepage; | |
2523 | tmp = kstrdup(devname, GFP_KERNEL); | |
2524 | if (tmp == NULL) | |
2525 | goto out_freepage; | |
2526 | kfree(mnt->mnt_devname); | |
2527 | mnt->mnt_devname = tmp; | |
2528 | out_freepage: | |
2529 | free_page((unsigned long)page); | |
2530 | } | |
2531 | ||
c02d7adf TM |
2532 | static int nfs_follow_remote_path(struct vfsmount *root_mnt, |
2533 | const char *export_path, struct vfsmount *mnt_target) | |
2534 | { | |
2535 | struct mnt_namespace *ns_private; | |
2536 | struct nameidata nd; | |
2537 | struct super_block *s; | |
2538 | int ret; | |
2539 | ||
2540 | ns_private = create_mnt_ns(root_mnt); | |
2541 | ret = PTR_ERR(ns_private); | |
2542 | if (IS_ERR(ns_private)) | |
2543 | goto out_mntput; | |
2544 | ||
2545 | ret = vfs_path_lookup(root_mnt->mnt_root, root_mnt, | |
2546 | export_path, LOOKUP_FOLLOW, &nd); | |
2547 | ||
2548 | put_mnt_ns(ns_private); | |
2549 | ||
2550 | if (ret != 0) | |
2551 | goto out_err; | |
2552 | ||
2553 | s = nd.path.mnt->mnt_sb; | |
2554 | atomic_inc(&s->s_active); | |
2555 | mnt_target->mnt_sb = s; | |
2556 | mnt_target->mnt_root = dget(nd.path.dentry); | |
2557 | ||
b88f8a54 TM |
2558 | /* Correct the device pathname */ |
2559 | nfs_fix_devname(&nd.path, mnt_target); | |
2560 | ||
c02d7adf TM |
2561 | path_put(&nd.path); |
2562 | down_write(&s->s_umount); | |
2563 | return 0; | |
2564 | out_mntput: | |
2565 | mntput(root_mnt); | |
2566 | out_err: | |
2567 | return ret; | |
2568 | } | |
2569 | ||
a6fe23be CL |
2570 | static int nfs4_try_mount(int flags, const char *dev_name, |
2571 | struct nfs_parsed_mount_data *data, | |
2572 | struct vfsmount *mnt) | |
2573 | { | |
2574 | char *export_path; | |
2575 | struct vfsmount *root_mnt; | |
2576 | int error; | |
2577 | ||
2578 | dfprintk(MOUNT, "--> nfs4_try_mount()\n"); | |
2579 | ||
2580 | export_path = data->nfs_server.export_path; | |
2581 | data->nfs_server.export_path = "/"; | |
2582 | root_mnt = nfs_do_root_mount(&nfs4_remote_fs_type, flags, data, | |
2583 | data->nfs_server.hostname); | |
2584 | data->nfs_server.export_path = export_path; | |
2585 | ||
2586 | error = PTR_ERR(root_mnt); | |
2587 | if (IS_ERR(root_mnt)) | |
2588 | goto out; | |
2589 | ||
2590 | error = nfs_follow_remote_path(root_mnt, export_path, mnt); | |
2591 | ||
2592 | out: | |
2593 | dfprintk(MOUNT, "<-- nfs4_try_mount() = %d%s\n", error, | |
2594 | error != 0 ? " [error]" : ""); | |
2595 | return error; | |
2596 | } | |
2597 | ||
c02d7adf TM |
2598 | /* |
2599 | * Get the superblock for an NFS4 mountpoint | |
2600 | */ | |
2601 | static int nfs4_get_sb(struct file_system_type *fs_type, | |
2602 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
2603 | { | |
2604 | struct nfs_parsed_mount_data *data; | |
c02d7adf TM |
2605 | int error = -ENOMEM; |
2606 | ||
2607 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2608 | if (data == NULL) | |
2609 | goto out_free_data; | |
2610 | ||
2611 | /* Validate the mount data */ | |
2612 | error = nfs4_validate_mount_data(raw_data, data, dev_name); | |
2613 | if (error < 0) | |
2614 | goto out; | |
2615 | ||
a6fe23be | 2616 | error = nfs4_try_mount(flags, dev_name, data, mnt); |
c02d7adf TM |
2617 | |
2618 | out: | |
2619 | kfree(data->client_address); | |
2620 | kfree(data->nfs_server.export_path); | |
2621 | kfree(data->nfs_server.hostname); | |
2622 | kfree(data->fscache_uniq); | |
2623 | out_free_data: | |
2624 | kfree(data); | |
2625 | dprintk("<-- nfs4_get_sb() = %d%s\n", error, | |
2626 | error != 0 ? " [error]" : ""); | |
2627 | return error; | |
2628 | } | |
2629 | ||
f7b422b1 DH |
2630 | static void nfs4_kill_super(struct super_block *sb) |
2631 | { | |
2632 | struct nfs_server *server = NFS_SB(sb); | |
2633 | ||
0f3e66c6 | 2634 | dprintk("--> %s\n", __func__); |
515d8611 | 2635 | nfs_super_return_all_delegations(sb); |
f7b422b1 | 2636 | kill_anon_super(sb); |
f7b422b1 | 2637 | nfs4_renewd_prepare_shutdown(server); |
08734048 | 2638 | nfs_fscache_release_super_cookie(sb); |
54ceac45 | 2639 | nfs_free_server(server); |
0f3e66c6 | 2640 | dprintk("<-- %s\n", __func__); |
f7b422b1 DH |
2641 | } |
2642 | ||
2643 | /* | |
54ceac45 | 2644 | * Clone an NFS4 server record on xdev traversal (FSID-change) |
f7b422b1 | 2645 | */ |
54ceac45 DH |
2646 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags, |
2647 | const char *dev_name, void *raw_data, | |
2648 | struct vfsmount *mnt) | |
f7b422b1 | 2649 | { |
54ceac45 DH |
2650 | struct nfs_clone_mount *data = raw_data; |
2651 | struct super_block *s; | |
2652 | struct nfs_server *server; | |
2653 | struct dentry *mntroot; | |
75180df2 | 2654 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2655 | struct nfs_sb_mountdata sb_mntdata = { |
2656 | .mntflags = flags, | |
2657 | }; | |
54ceac45 | 2658 | int error; |
f7b422b1 | 2659 | |
54ceac45 | 2660 | dprintk("--> nfs4_xdev_get_sb()\n"); |
f7b422b1 | 2661 | |
54ceac45 DH |
2662 | /* create a new volume representation */ |
2663 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
2664 | if (IS_ERR(server)) { | |
2665 | error = PTR_ERR(server); | |
2666 | goto out_err_noserver; | |
f7b422b1 | 2667 | } |
e89a5a43 | 2668 | sb_mntdata.server = server; |
f7b422b1 | 2669 | |
75180df2 TM |
2670 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2671 | compare_super = NULL; | |
2672 | ||
54ceac45 | 2673 | /* Get a superblock - note that we may end up sharing one that already exists */ |
ec9a05c9 | 2674 | s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2675 | if (IS_ERR(s)) { |
2676 | error = PTR_ERR(s); | |
2677 | goto out_err_nosb; | |
f7b422b1 | 2678 | } |
f7b422b1 | 2679 | |
54ceac45 DH |
2680 | if (s->s_fs_info != server) { |
2681 | nfs_free_server(server); | |
2682 | server = NULL; | |
fa799759 MS |
2683 | } else { |
2684 | error = nfs_bdi_register(server); | |
2685 | if (error) | |
2686 | goto error_splat_super; | |
54ceac45 | 2687 | } |
f7b422b1 | 2688 | |
54ceac45 DH |
2689 | if (!s->s_root) { |
2690 | /* initial superblock/root creation */ | |
54ceac45 DH |
2691 | nfs4_clone_super(s, data->sb); |
2692 | } | |
f7b422b1 | 2693 | |
54ceac45 DH |
2694 | mntroot = nfs4_get_root(s, data->fh); |
2695 | if (IS_ERR(mntroot)) { | |
2696 | error = PTR_ERR(mntroot); | |
2697 | goto error_splat_super; | |
2698 | } | |
e9cc6c23 TM |
2699 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
2700 | dput(mntroot); | |
2701 | error = -ESTALE; | |
2702 | goto error_splat_super; | |
2703 | } | |
f7b422b1 | 2704 | |
54ceac45 DH |
2705 | s->s_flags |= MS_ACTIVE; |
2706 | mnt->mnt_sb = s; | |
2707 | mnt->mnt_root = mntroot; | |
2708 | ||
46c8ac74 EP |
2709 | security_sb_clone_mnt_opts(data->sb, s); |
2710 | ||
54ceac45 DH |
2711 | dprintk("<-- nfs4_xdev_get_sb() = 0\n"); |
2712 | return 0; | |
2713 | ||
2714 | out_err_nosb: | |
2715 | nfs_free_server(server); | |
2716 | out_err_noserver: | |
2717 | dprintk("<-- nfs4_xdev_get_sb() = %d [error]\n", error); | |
2718 | return error; | |
2719 | ||
2720 | error_splat_super: | |
6f5bbff9 | 2721 | deactivate_locked_super(s); |
54ceac45 DH |
2722 | dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error); |
2723 | return error; | |
f7b422b1 DH |
2724 | } |
2725 | ||
c02d7adf TM |
2726 | static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type, |
2727 | int flags, const char *dev_name, void *raw_data, | |
2728 | struct vfsmount *mnt) | |
f7b422b1 DH |
2729 | { |
2730 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
2731 | struct super_block *s; |
2732 | struct nfs_server *server; | |
2733 | struct dentry *mntroot; | |
2734 | struct nfs_fh mntfh; | |
75180df2 | 2735 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2736 | struct nfs_sb_mountdata sb_mntdata = { |
2737 | .mntflags = flags, | |
2738 | }; | |
54ceac45 DH |
2739 | int error; |
2740 | ||
2741 | dprintk("--> nfs4_referral_get_sb()\n"); | |
2742 | ||
2743 | /* create a new volume representation */ | |
2744 | server = nfs4_create_referral_server(data, &mntfh); | |
2745 | if (IS_ERR(server)) { | |
2746 | error = PTR_ERR(server); | |
2747 | goto out_err_noserver; | |
2748 | } | |
e89a5a43 | 2749 | sb_mntdata.server = server; |
54ceac45 | 2750 | |
75180df2 TM |
2751 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2752 | compare_super = NULL; | |
2753 | ||
54ceac45 | 2754 | /* Get a superblock - note that we may end up sharing one that already exists */ |
ec9a05c9 | 2755 | s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2756 | if (IS_ERR(s)) { |
2757 | error = PTR_ERR(s); | |
2758 | goto out_err_nosb; | |
2759 | } | |
2760 | ||
2761 | if (s->s_fs_info != server) { | |
2762 | nfs_free_server(server); | |
2763 | server = NULL; | |
fa799759 MS |
2764 | } else { |
2765 | error = nfs_bdi_register(server); | |
2766 | if (error) | |
2767 | goto error_splat_super; | |
54ceac45 DH |
2768 | } |
2769 | ||
2770 | if (!s->s_root) { | |
2771 | /* initial superblock/root creation */ | |
54ceac45 DH |
2772 | nfs4_fill_super(s); |
2773 | } | |
2774 | ||
f2d0d85e | 2775 | mntroot = nfs4_get_root(s, &mntfh); |
54ceac45 DH |
2776 | if (IS_ERR(mntroot)) { |
2777 | error = PTR_ERR(mntroot); | |
2778 | goto error_splat_super; | |
2779 | } | |
e9cc6c23 TM |
2780 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
2781 | dput(mntroot); | |
2782 | error = -ESTALE; | |
2783 | goto error_splat_super; | |
2784 | } | |
54ceac45 DH |
2785 | |
2786 | s->s_flags |= MS_ACTIVE; | |
2787 | mnt->mnt_sb = s; | |
2788 | mnt->mnt_root = mntroot; | |
2789 | ||
46c8ac74 EP |
2790 | security_sb_clone_mnt_opts(data->sb, s); |
2791 | ||
54ceac45 DH |
2792 | dprintk("<-- nfs4_referral_get_sb() = 0\n"); |
2793 | return 0; | |
2794 | ||
2795 | out_err_nosb: | |
2796 | nfs_free_server(server); | |
2797 | out_err_noserver: | |
2798 | dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error); | |
2799 | return error; | |
2800 | ||
2801 | error_splat_super: | |
6f5bbff9 | 2802 | deactivate_locked_super(s); |
54ceac45 DH |
2803 | dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error); |
2804 | return error; | |
f7b422b1 DH |
2805 | } |
2806 | ||
c02d7adf TM |
2807 | /* |
2808 | * Create an NFS4 server record on referral traversal | |
2809 | */ | |
2810 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, | |
2811 | int flags, const char *dev_name, void *raw_data, | |
2812 | struct vfsmount *mnt) | |
2813 | { | |
2814 | struct nfs_clone_mount *data = raw_data; | |
2815 | char *export_path; | |
2816 | struct vfsmount *root_mnt; | |
2817 | int error; | |
2818 | ||
2819 | dprintk("--> nfs4_referral_get_sb()\n"); | |
2820 | ||
2821 | export_path = data->mnt_path; | |
2822 | data->mnt_path = "/"; | |
2823 | ||
2824 | root_mnt = nfs_do_root_mount(&nfs4_remote_referral_fs_type, | |
2825 | flags, data, data->hostname); | |
2826 | data->mnt_path = export_path; | |
2827 | ||
2828 | error = PTR_ERR(root_mnt); | |
2829 | if (IS_ERR(root_mnt)) | |
2830 | goto out; | |
2831 | ||
2832 | error = nfs_follow_remote_path(root_mnt, export_path, mnt); | |
2833 | out: | |
2834 | dprintk("<-- nfs4_referral_get_sb() = %d%s\n", error, | |
2835 | error != 0 ? " [error]" : ""); | |
2836 | return error; | |
2837 | } | |
2838 | ||
54ceac45 | 2839 | #endif /* CONFIG_NFS_V4 */ |