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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, | |
764302cc | 76 | Opt_v2, Opt_v3, Opt_v4, |
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" }, | |
764302cc | 130 | { Opt_v4, "v4" }, |
bf0fd768 CL |
131 | { Opt_udp, "udp" }, |
132 | { Opt_tcp, "tcp" }, | |
2cf7ff7a | 133 | { Opt_rdma, "rdma" }, |
bf0fd768 CL |
134 | { Opt_acl, "acl" }, |
135 | { Opt_noacl, "noacl" }, | |
136 | { Opt_rdirplus, "rdirplus" }, | |
137 | { Opt_nordirplus, "nordirplus" }, | |
75180df2 TM |
138 | { Opt_sharecache, "sharecache" }, |
139 | { Opt_nosharecache, "nosharecache" }, | |
d740351b CL |
140 | { Opt_resvport, "resvport" }, |
141 | { Opt_noresvport, "noresvport" }, | |
b797cac7 DH |
142 | { Opt_fscache, "fsc" }, |
143 | { Opt_fscache_uniq, "fsc=%s" }, | |
144 | { Opt_nofscache, "nofsc" }, | |
bf0fd768 | 145 | |
a5a16bae CL |
146 | { Opt_port, "port=%s" }, |
147 | { Opt_rsize, "rsize=%s" }, | |
148 | { Opt_wsize, "wsize=%s" }, | |
149 | { Opt_bsize, "bsize=%s" }, | |
150 | { Opt_timeo, "timeo=%s" }, | |
151 | { Opt_retrans, "retrans=%s" }, | |
152 | { Opt_acregmin, "acregmin=%s" }, | |
153 | { Opt_acregmax, "acregmax=%s" }, | |
154 | { Opt_acdirmin, "acdirmin=%s" }, | |
155 | { Opt_acdirmax, "acdirmax=%s" }, | |
156 | { Opt_actimeo, "actimeo=%s" }, | |
157 | { Opt_namelen, "namlen=%s" }, | |
158 | { Opt_mountport, "mountport=%s" }, | |
159 | { Opt_mountvers, "mountvers=%s" }, | |
160 | { Opt_nfsvers, "nfsvers=%s" }, | |
161 | { Opt_nfsvers, "vers=%s" }, | |
f3f4f4ed | 162 | { Opt_minorversion, "minorversion=%s" }, |
bf0fd768 CL |
163 | |
164 | { Opt_sec, "sec=%s" }, | |
165 | { Opt_proto, "proto=%s" }, | |
166 | { Opt_mountproto, "mountproto=%s" }, | |
167 | { Opt_addr, "addr=%s" }, | |
168 | { Opt_clientaddr, "clientaddr=%s" }, | |
33832034 | 169 | { Opt_mounthost, "mounthost=%s" }, |
0ac83779 | 170 | { Opt_mountaddr, "mountaddr=%s" }, |
bf0fd768 | 171 | |
7973c1f1 TM |
172 | { Opt_lookupcache, "lookupcache=%s" }, |
173 | ||
bf0fd768 CL |
174 | { Opt_err, NULL } |
175 | }; | |
176 | ||
177 | enum { | |
ee671b01 | 178 | Opt_xprt_udp, Opt_xprt_udp6, Opt_xprt_tcp, Opt_xprt_tcp6, Opt_xprt_rdma, |
bf0fd768 CL |
179 | |
180 | Opt_xprt_err | |
181 | }; | |
182 | ||
a447c093 | 183 | static const match_table_t nfs_xprt_protocol_tokens = { |
bf0fd768 | 184 | { Opt_xprt_udp, "udp" }, |
ee671b01 | 185 | { Opt_xprt_udp6, "udp6" }, |
bf0fd768 | 186 | { Opt_xprt_tcp, "tcp" }, |
ee671b01 | 187 | { Opt_xprt_tcp6, "tcp6" }, |
2cf7ff7a | 188 | { Opt_xprt_rdma, "rdma" }, |
bf0fd768 CL |
189 | |
190 | { Opt_xprt_err, NULL } | |
191 | }; | |
192 | ||
193 | enum { | |
194 | Opt_sec_none, Opt_sec_sys, | |
195 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
196 | Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, | |
197 | Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, | |
198 | ||
199 | Opt_sec_err | |
200 | }; | |
201 | ||
a447c093 | 202 | static const match_table_t nfs_secflavor_tokens = { |
bf0fd768 CL |
203 | { Opt_sec_none, "none" }, |
204 | { Opt_sec_none, "null" }, | |
205 | { Opt_sec_sys, "sys" }, | |
206 | ||
207 | { Opt_sec_krb5, "krb5" }, | |
208 | { Opt_sec_krb5i, "krb5i" }, | |
209 | { Opt_sec_krb5p, "krb5p" }, | |
210 | ||
211 | { Opt_sec_lkey, "lkey" }, | |
212 | { Opt_sec_lkeyi, "lkeyi" }, | |
213 | { Opt_sec_lkeyp, "lkeyp" }, | |
214 | ||
8d042218 OK |
215 | { Opt_sec_spkm, "spkm3" }, |
216 | { Opt_sec_spkmi, "spkm3i" }, | |
217 | { Opt_sec_spkmp, "spkm3p" }, | |
218 | ||
bf0fd768 CL |
219 | { Opt_sec_err, NULL } |
220 | }; | |
221 | ||
7973c1f1 TM |
222 | enum { |
223 | Opt_lookupcache_all, Opt_lookupcache_positive, | |
224 | Opt_lookupcache_none, | |
225 | ||
226 | Opt_lookupcache_err | |
227 | }; | |
228 | ||
229 | static match_table_t nfs_lookupcache_tokens = { | |
230 | { Opt_lookupcache_all, "all" }, | |
231 | { Opt_lookupcache_positive, "pos" }, | |
232 | { Opt_lookupcache_positive, "positive" }, | |
233 | { Opt_lookupcache_none, "none" }, | |
234 | ||
235 | { Opt_lookupcache_err, NULL } | |
236 | }; | |
237 | ||
bf0fd768 | 238 | |
42faad99 | 239 | static void nfs_umount_begin(struct super_block *); |
816724e6 | 240 | static int nfs_statfs(struct dentry *, struct kstatfs *); |
f7b422b1 DH |
241 | static int nfs_show_options(struct seq_file *, struct vfsmount *); |
242 | static int nfs_show_stats(struct seq_file *, struct vfsmount *); | |
816724e6 | 243 | static int nfs_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *); |
54ceac45 | 244 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, |
816724e6 | 245 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); |
f7b422b1 | 246 | static void nfs_kill_super(struct super_block *); |
48b605f8 | 247 | static int nfs_remount(struct super_block *sb, int *flags, char *raw_data); |
f7b422b1 DH |
248 | |
249 | static struct file_system_type nfs_fs_type = { | |
250 | .owner = THIS_MODULE, | |
251 | .name = "nfs", | |
252 | .get_sb = nfs_get_sb, | |
253 | .kill_sb = nfs_kill_super, | |
349457cc | 254 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
255 | }; |
256 | ||
54ceac45 | 257 | struct file_system_type nfs_xdev_fs_type = { |
f7b422b1 DH |
258 | .owner = THIS_MODULE, |
259 | .name = "nfs", | |
54ceac45 | 260 | .get_sb = nfs_xdev_get_sb, |
f7b422b1 | 261 | .kill_sb = nfs_kill_super, |
349457cc | 262 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
263 | }; |
264 | ||
ee9b6d61 | 265 | static const struct super_operations nfs_sops = { |
f7b422b1 DH |
266 | .alloc_inode = nfs_alloc_inode, |
267 | .destroy_inode = nfs_destroy_inode, | |
268 | .write_inode = nfs_write_inode, | |
269 | .statfs = nfs_statfs, | |
270 | .clear_inode = nfs_clear_inode, | |
271 | .umount_begin = nfs_umount_begin, | |
272 | .show_options = nfs_show_options, | |
273 | .show_stats = nfs_show_stats, | |
48b605f8 | 274 | .remount_fs = nfs_remount, |
f7b422b1 DH |
275 | }; |
276 | ||
277 | #ifdef CONFIG_NFS_V4 | |
7630c852 CL |
278 | static int nfs4_validate_text_mount_data(void *options, |
279 | struct nfs_parsed_mount_data *args, const char *dev_name); | |
a6fe23be CL |
280 | static int nfs4_try_mount(int flags, const char *dev_name, |
281 | struct nfs_parsed_mount_data *data, struct vfsmount *mnt); | |
816724e6 TM |
282 | static int nfs4_get_sb(struct file_system_type *fs_type, |
283 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
c02d7adf TM |
284 | static int nfs4_remote_get_sb(struct file_system_type *fs_type, |
285 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
54ceac45 DH |
286 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, |
287 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
288 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, | |
289 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
c02d7adf TM |
290 | static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type, |
291 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
f7b422b1 DH |
292 | static void nfs4_kill_super(struct super_block *sb); |
293 | ||
294 | static struct file_system_type nfs4_fs_type = { | |
295 | .owner = THIS_MODULE, | |
296 | .name = "nfs4", | |
297 | .get_sb = nfs4_get_sb, | |
298 | .kill_sb = nfs4_kill_super, | |
349457cc | 299 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
300 | }; |
301 | ||
c02d7adf TM |
302 | static struct file_system_type nfs4_remote_fs_type = { |
303 | .owner = THIS_MODULE, | |
304 | .name = "nfs4", | |
305 | .get_sb = nfs4_remote_get_sb, | |
306 | .kill_sb = nfs4_kill_super, | |
307 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, | |
308 | }; | |
309 | ||
54ceac45 | 310 | struct file_system_type nfs4_xdev_fs_type = { |
f7b422b1 DH |
311 | .owner = THIS_MODULE, |
312 | .name = "nfs4", | |
54ceac45 | 313 | .get_sb = nfs4_xdev_get_sb, |
f7b422b1 | 314 | .kill_sb = nfs4_kill_super, |
349457cc | 315 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
316 | }; |
317 | ||
c02d7adf TM |
318 | static struct file_system_type nfs4_remote_referral_fs_type = { |
319 | .owner = THIS_MODULE, | |
320 | .name = "nfs4", | |
321 | .get_sb = nfs4_remote_referral_get_sb, | |
322 | .kill_sb = nfs4_kill_super, | |
323 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, | |
324 | }; | |
325 | ||
54ceac45 | 326 | struct file_system_type nfs4_referral_fs_type = { |
f7b422b1 DH |
327 | .owner = THIS_MODULE, |
328 | .name = "nfs4", | |
54ceac45 | 329 | .get_sb = nfs4_referral_get_sb, |
f7b422b1 | 330 | .kill_sb = nfs4_kill_super, |
349457cc | 331 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
332 | }; |
333 | ||
ee9b6d61 | 334 | static const struct super_operations nfs4_sops = { |
f7b422b1 DH |
335 | .alloc_inode = nfs_alloc_inode, |
336 | .destroy_inode = nfs_destroy_inode, | |
337 | .write_inode = nfs_write_inode, | |
338 | .statfs = nfs_statfs, | |
339 | .clear_inode = nfs4_clear_inode, | |
340 | .umount_begin = nfs_umount_begin, | |
341 | .show_options = nfs_show_options, | |
342 | .show_stats = nfs_show_stats, | |
48b605f8 | 343 | .remount_fs = nfs_remount, |
f7b422b1 DH |
344 | }; |
345 | #endif | |
346 | ||
8e1f936b RR |
347 | static struct shrinker acl_shrinker = { |
348 | .shrink = nfs_access_cache_shrinker, | |
349 | .seeks = DEFAULT_SEEKS, | |
350 | }; | |
979df72e | 351 | |
f7b422b1 DH |
352 | /* |
353 | * Register the NFS filesystems | |
354 | */ | |
355 | int __init register_nfs_fs(void) | |
356 | { | |
357 | int ret; | |
358 | ||
359 | ret = register_filesystem(&nfs_fs_type); | |
360 | if (ret < 0) | |
361 | goto error_0; | |
362 | ||
f7b422b1 DH |
363 | ret = nfs_register_sysctl(); |
364 | if (ret < 0) | |
365 | goto error_1; | |
89a09141 | 366 | #ifdef CONFIG_NFS_V4 |
f7b422b1 DH |
367 | ret = register_filesystem(&nfs4_fs_type); |
368 | if (ret < 0) | |
369 | goto error_2; | |
370 | #endif | |
8e1f936b | 371 | register_shrinker(&acl_shrinker); |
f7b422b1 DH |
372 | return 0; |
373 | ||
374 | #ifdef CONFIG_NFS_V4 | |
375 | error_2: | |
376 | nfs_unregister_sysctl(); | |
89a09141 | 377 | #endif |
f7b422b1 DH |
378 | error_1: |
379 | unregister_filesystem(&nfs_fs_type); | |
f7b422b1 DH |
380 | error_0: |
381 | return ret; | |
382 | } | |
383 | ||
384 | /* | |
385 | * Unregister the NFS filesystems | |
386 | */ | |
387 | void __exit unregister_nfs_fs(void) | |
388 | { | |
8e1f936b | 389 | unregister_shrinker(&acl_shrinker); |
f7b422b1 DH |
390 | #ifdef CONFIG_NFS_V4 |
391 | unregister_filesystem(&nfs4_fs_type); | |
f7b422b1 | 392 | #endif |
49af7ee1 | 393 | nfs_unregister_sysctl(); |
f7b422b1 DH |
394 | unregister_filesystem(&nfs_fs_type); |
395 | } | |
396 | ||
1daef0a8 | 397 | void nfs_sb_active(struct super_block *sb) |
ef818a28 | 398 | { |
1daef0a8 | 399 | struct nfs_server *server = NFS_SB(sb); |
ef818a28 | 400 | |
1daef0a8 TM |
401 | if (atomic_inc_return(&server->active) == 1) |
402 | atomic_inc(&sb->s_active); | |
ef818a28 SD |
403 | } |
404 | ||
1daef0a8 | 405 | void nfs_sb_deactive(struct super_block *sb) |
ef818a28 SD |
406 | { |
407 | struct nfs_server *server = NFS_SB(sb); | |
1daef0a8 TM |
408 | |
409 | if (atomic_dec_and_test(&server->active)) | |
410 | deactivate_super(sb); | |
ef818a28 SD |
411 | } |
412 | ||
f7b422b1 DH |
413 | /* |
414 | * Deliver file system statistics to userspace | |
415 | */ | |
816724e6 | 416 | static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
f7b422b1 | 417 | { |
0c7d90cf | 418 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
f7b422b1 DH |
419 | unsigned char blockbits; |
420 | unsigned long blockres; | |
0c7d90cf | 421 | struct nfs_fh *fh = NFS_FH(dentry->d_inode); |
f7b422b1 DH |
422 | struct nfs_fattr fattr; |
423 | struct nfs_fsstat res = { | |
424 | .fattr = &fattr, | |
425 | }; | |
426 | int error; | |
427 | ||
8fa5c000 | 428 | error = server->nfs_client->rpc_ops->statfs(server, fh, &res); |
f7b422b1 DH |
429 | if (error < 0) |
430 | goto out_err; | |
1a0ba9ae | 431 | buf->f_type = NFS_SUPER_MAGIC; |
f7b422b1 DH |
432 | |
433 | /* | |
434 | * Current versions of glibc do not correctly handle the | |
435 | * case where f_frsize != f_bsize. Eventually we want to | |
436 | * report the value of wtmult in this field. | |
437 | */ | |
0c7d90cf | 438 | buf->f_frsize = dentry->d_sb->s_blocksize; |
f7b422b1 DH |
439 | |
440 | /* | |
441 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
442 | * are reported in units of f_frsize. Linux hasn't had | |
443 | * an f_frsize field in its statfs struct until recently, | |
444 | * thus historically Linux's sys_statfs reports these | |
445 | * fields in units of f_bsize. | |
446 | */ | |
0c7d90cf DH |
447 | buf->f_bsize = dentry->d_sb->s_blocksize; |
448 | blockbits = dentry->d_sb->s_blocksize_bits; | |
f7b422b1 DH |
449 | blockres = (1 << blockbits) - 1; |
450 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
451 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
452 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
453 | ||
454 | buf->f_files = res.tfiles; | |
455 | buf->f_ffree = res.afiles; | |
456 | ||
457 | buf->f_namelen = server->namelen; | |
1a0ba9ae | 458 | |
f7b422b1 DH |
459 | return 0; |
460 | ||
461 | out_err: | |
3110ff80 | 462 | dprintk("%s: statfs error = %d\n", __func__, -error); |
1a0ba9ae | 463 | return error; |
f7b422b1 DH |
464 | } |
465 | ||
7d4e2747 DH |
466 | /* |
467 | * Map the security flavour number to a name | |
468 | */ | |
81039f1f TM |
469 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
470 | { | |
7d4e2747 | 471 | static const struct { |
81039f1f TM |
472 | rpc_authflavor_t flavour; |
473 | const char *str; | |
474 | } sec_flavours[] = { | |
475 | { RPC_AUTH_NULL, "null" }, | |
476 | { RPC_AUTH_UNIX, "sys" }, | |
477 | { RPC_AUTH_GSS_KRB5, "krb5" }, | |
478 | { RPC_AUTH_GSS_KRB5I, "krb5i" }, | |
479 | { RPC_AUTH_GSS_KRB5P, "krb5p" }, | |
480 | { RPC_AUTH_GSS_LKEY, "lkey" }, | |
481 | { RPC_AUTH_GSS_LKEYI, "lkeyi" }, | |
482 | { RPC_AUTH_GSS_LKEYP, "lkeyp" }, | |
483 | { RPC_AUTH_GSS_SPKM, "spkm" }, | |
484 | { RPC_AUTH_GSS_SPKMI, "spkmi" }, | |
485 | { RPC_AUTH_GSS_SPKMP, "spkmp" }, | |
4d81cd16 | 486 | { UINT_MAX, "unknown" } |
81039f1f TM |
487 | }; |
488 | int i; | |
489 | ||
4d81cd16 | 490 | for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) { |
81039f1f TM |
491 | if (sec_flavours[i].flavour == flavour) |
492 | break; | |
493 | } | |
494 | return sec_flavours[i].str; | |
495 | } | |
496 | ||
ee671b01 JL |
497 | static void nfs_show_mountd_netid(struct seq_file *m, struct nfs_server *nfss, |
498 | int showdefaults) | |
499 | { | |
500 | struct sockaddr *sap = (struct sockaddr *) &nfss->mountd_address; | |
501 | ||
502 | seq_printf(m, ",mountproto="); | |
503 | switch (sap->sa_family) { | |
504 | case AF_INET: | |
505 | switch (nfss->mountd_protocol) { | |
506 | case IPPROTO_UDP: | |
507 | seq_printf(m, RPCBIND_NETID_UDP); | |
508 | break; | |
509 | case IPPROTO_TCP: | |
510 | seq_printf(m, RPCBIND_NETID_TCP); | |
511 | break; | |
512 | default: | |
513 | if (showdefaults) | |
514 | seq_printf(m, "auto"); | |
515 | } | |
516 | break; | |
517 | case AF_INET6: | |
518 | switch (nfss->mountd_protocol) { | |
519 | case IPPROTO_UDP: | |
520 | seq_printf(m, RPCBIND_NETID_UDP6); | |
521 | break; | |
522 | case IPPROTO_TCP: | |
523 | seq_printf(m, RPCBIND_NETID_TCP6); | |
524 | break; | |
525 | default: | |
526 | if (showdefaults) | |
527 | seq_printf(m, "auto"); | |
528 | } | |
529 | break; | |
530 | default: | |
531 | if (showdefaults) | |
532 | seq_printf(m, "auto"); | |
533 | } | |
534 | } | |
535 | ||
82d101d5 CL |
536 | static void nfs_show_mountd_options(struct seq_file *m, struct nfs_server *nfss, |
537 | int showdefaults) | |
538 | { | |
539 | struct sockaddr *sap = (struct sockaddr *)&nfss->mountd_address; | |
540 | ||
541 | switch (sap->sa_family) { | |
542 | case AF_INET: { | |
543 | struct sockaddr_in *sin = (struct sockaddr_in *)sap; | |
be859405 | 544 | seq_printf(m, ",mountaddr=%pI4", &sin->sin_addr.s_addr); |
82d101d5 CL |
545 | break; |
546 | } | |
547 | case AF_INET6: { | |
548 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
5b095d98 | 549 | seq_printf(m, ",mountaddr=%pI6", &sin6->sin6_addr); |
82d101d5 CL |
550 | break; |
551 | } | |
552 | default: | |
553 | if (showdefaults) | |
554 | seq_printf(m, ",mountaddr=unspecified"); | |
555 | } | |
556 | ||
557 | if (nfss->mountd_version || showdefaults) | |
558 | seq_printf(m, ",mountvers=%u", nfss->mountd_version); | |
559 | if (nfss->mountd_port || showdefaults) | |
560 | seq_printf(m, ",mountport=%u", nfss->mountd_port); | |
561 | ||
ee671b01 | 562 | nfs_show_mountd_netid(m, nfss, showdefaults); |
82d101d5 CL |
563 | } |
564 | ||
f7b422b1 DH |
565 | /* |
566 | * Describe the mount options in force on this server representation | |
567 | */ | |
82d101d5 CL |
568 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, |
569 | int showdefaults) | |
f7b422b1 | 570 | { |
509de811 | 571 | static const struct proc_nfs_info { |
f7b422b1 | 572 | int flag; |
509de811 DH |
573 | const char *str; |
574 | const char *nostr; | |
f7b422b1 DH |
575 | } nfs_info[] = { |
576 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, | |
82d101d5 | 577 | { NFS_MOUNT_POSIX, ",posix", "" }, |
f7b422b1 DH |
578 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
579 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
580 | { NFS_MOUNT_NONLM, ",nolock", "" }, | |
581 | { NFS_MOUNT_NOACL, ",noacl", "" }, | |
74dd34e6 | 582 | { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" }, |
d740351b CL |
583 | { NFS_MOUNT_UNSHARED, ",nosharecache", "" }, |
584 | { NFS_MOUNT_NORESVPORT, ",noresvport", "" }, | |
f7b422b1 DH |
585 | { 0, NULL, NULL } |
586 | }; | |
509de811 | 587 | const struct proc_nfs_info *nfs_infop; |
8fa5c000 | 588 | struct nfs_client *clp = nfss->nfs_client; |
82d101d5 | 589 | u32 version = clp->rpc_ops->version; |
f7b422b1 | 590 | |
82d101d5 | 591 | seq_printf(m, ",vers=%u", version); |
2d767432 CL |
592 | seq_printf(m, ",rsize=%u", nfss->rsize); |
593 | seq_printf(m, ",wsize=%u", nfss->wsize); | |
82d101d5 CL |
594 | if (nfss->bsize != 0) |
595 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
596 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
0e0cab74 | 597 | if (nfss->acregmin != NFS_DEF_ACREGMIN*HZ || showdefaults) |
2d767432 | 598 | seq_printf(m, ",acregmin=%u", nfss->acregmin/HZ); |
0e0cab74 | 599 | if (nfss->acregmax != NFS_DEF_ACREGMAX*HZ || showdefaults) |
2d767432 | 600 | seq_printf(m, ",acregmax=%u", nfss->acregmax/HZ); |
0e0cab74 | 601 | if (nfss->acdirmin != NFS_DEF_ACDIRMIN*HZ || showdefaults) |
2d767432 | 602 | seq_printf(m, ",acdirmin=%u", nfss->acdirmin/HZ); |
0e0cab74 | 603 | if (nfss->acdirmax != NFS_DEF_ACDIRMAX*HZ || showdefaults) |
2d767432 | 604 | seq_printf(m, ",acdirmax=%u", nfss->acdirmax/HZ); |
f7b422b1 DH |
605 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { |
606 | if (nfss->flags & nfs_infop->flag) | |
607 | seq_puts(m, nfs_infop->str); | |
608 | else | |
609 | seq_puts(m, nfs_infop->nostr); | |
610 | } | |
56928edd | 611 | seq_printf(m, ",proto=%s", |
ee671b01 | 612 | rpc_peeraddr2str(nfss->client, RPC_DISPLAY_NETID)); |
82d101d5 CL |
613 | if (version == 4) { |
614 | if (nfss->port != NFS_PORT) | |
615 | seq_printf(m, ",port=%u", nfss->port); | |
616 | } else | |
617 | if (nfss->port) | |
618 | seq_printf(m, ",port=%u", nfss->port); | |
619 | ||
33170233 TM |
620 | seq_printf(m, ",timeo=%lu", 10U * nfss->client->cl_timeout->to_initval / HZ); |
621 | seq_printf(m, ",retrans=%u", nfss->client->cl_timeout->to_retries); | |
81039f1f | 622 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
82d101d5 CL |
623 | |
624 | if (version != 4) | |
625 | nfs_show_mountd_options(m, nfss, showdefaults); | |
626 | ||
627 | #ifdef CONFIG_NFS_V4 | |
628 | if (clp->rpc_ops->version == 4) | |
629 | seq_printf(m, ",clientaddr=%s", clp->cl_ipaddr); | |
630 | #endif | |
b797cac7 DH |
631 | if (nfss->options & NFS_OPTION_FSCACHE) |
632 | seq_printf(m, ",fsc"); | |
f7b422b1 DH |
633 | } |
634 | ||
635 | /* | |
636 | * Describe the mount options on this VFS mountpoint | |
637 | */ | |
638 | static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) | |
639 | { | |
640 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
641 | ||
642 | nfs_show_mount_options(m, nfss, 0); | |
643 | ||
5d8515ca CL |
644 | seq_printf(m, ",addr=%s", |
645 | rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient, | |
646 | RPC_DISPLAY_ADDR)); | |
f7b422b1 DH |
647 | |
648 | return 0; | |
649 | } | |
650 | ||
651 | /* | |
652 | * Present statistical information for this VFS mountpoint | |
653 | */ | |
654 | static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) | |
655 | { | |
656 | int i, cpu; | |
657 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
658 | struct rpc_auth *auth = nfss->client->cl_auth; | |
659 | struct nfs_iostats totals = { }; | |
660 | ||
661 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
662 | ||
663 | /* | |
664 | * Display all mount option settings | |
665 | */ | |
666 | seq_printf(m, "\n\topts:\t"); | |
667 | seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw"); | |
668 | seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); | |
669 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : ""); | |
670 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); | |
671 | nfs_show_mount_options(m, nfss, 1); | |
672 | ||
673 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); | |
674 | ||
675 | seq_printf(m, "\n\tcaps:\t"); | |
676 | seq_printf(m, "caps=0x%x", nfss->caps); | |
2d767432 CL |
677 | seq_printf(m, ",wtmult=%u", nfss->wtmult); |
678 | seq_printf(m, ",dtsize=%u", nfss->dtsize); | |
679 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
680 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
f7b422b1 DH |
681 | |
682 | #ifdef CONFIG_NFS_V4 | |
40c55319 | 683 | if (nfss->nfs_client->rpc_ops->version == 4) { |
f7b422b1 DH |
684 | seq_printf(m, "\n\tnfsv4:\t"); |
685 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); | |
686 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
687 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); | |
688 | } | |
689 | #endif | |
690 | ||
691 | /* | |
692 | * Display security flavor in effect for this mount | |
693 | */ | |
2d767432 | 694 | seq_printf(m, "\n\tsec:\tflavor=%u", auth->au_ops->au_flavor); |
f7b422b1 | 695 | if (auth->au_flavor) |
2d767432 | 696 | seq_printf(m, ",pseudoflavor=%u", auth->au_flavor); |
f7b422b1 DH |
697 | |
698 | /* | |
699 | * Display superblock I/O counters | |
700 | */ | |
701 | for_each_possible_cpu(cpu) { | |
702 | struct nfs_iostats *stats; | |
703 | ||
704 | preempt_disable(); | |
705 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
706 | ||
707 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
708 | totals.events[i] += stats->events[i]; | |
709 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
710 | totals.bytes[i] += stats->bytes[i]; | |
6a51091d DH |
711 | #ifdef CONFIG_NFS_FSCACHE |
712 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
713 | totals.fscache[i] += stats->fscache[i]; | |
714 | #endif | |
f7b422b1 DH |
715 | |
716 | preempt_enable(); | |
717 | } | |
718 | ||
719 | seq_printf(m, "\n\tevents:\t"); | |
720 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
721 | seq_printf(m, "%lu ", totals.events[i]); | |
722 | seq_printf(m, "\n\tbytes:\t"); | |
723 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
724 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
6a51091d DH |
725 | #ifdef CONFIG_NFS_FSCACHE |
726 | if (nfss->options & NFS_OPTION_FSCACHE) { | |
727 | seq_printf(m, "\n\tfsc:\t"); | |
728 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
729 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
730 | } | |
731 | #endif | |
f7b422b1 DH |
732 | seq_printf(m, "\n"); |
733 | ||
734 | rpc_print_iostats(m, nfss->client); | |
735 | ||
736 | return 0; | |
737 | } | |
738 | ||
739 | /* | |
740 | * Begin unmount by attempting to remove all automounted mountpoints we added | |
54ceac45 | 741 | * in response to xdev traversals and referrals |
f7b422b1 | 742 | */ |
42faad99 | 743 | static void nfs_umount_begin(struct super_block *sb) |
f7b422b1 | 744 | { |
67e55205 | 745 | struct nfs_server *server; |
fc6ae3cf TM |
746 | struct rpc_clnt *rpc; |
747 | ||
67e55205 | 748 | server = NFS_SB(sb); |
fc6ae3cf TM |
749 | /* -EIO all pending I/O */ |
750 | rpc = server->client_acl; | |
751 | if (!IS_ERR(rpc)) | |
752 | rpc_killall_tasks(rpc); | |
753 | rpc = server->client; | |
754 | if (!IS_ERR(rpc)) | |
755 | rpc_killall_tasks(rpc); | |
f7b422b1 DH |
756 | } |
757 | ||
c5811dbd | 758 | static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(unsigned int version) |
9423a08a CL |
759 | { |
760 | struct nfs_parsed_mount_data *data; | |
761 | ||
762 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
763 | if (data) { | |
9423a08a CL |
764 | data->rsize = NFS_MAX_FILE_IO_SIZE; |
765 | data->wsize = NFS_MAX_FILE_IO_SIZE; | |
766 | data->acregmin = NFS_DEF_ACREGMIN; | |
767 | data->acregmax = NFS_DEF_ACREGMAX; | |
768 | data->acdirmin = NFS_DEF_ACDIRMIN; | |
769 | data->acdirmax = NFS_DEF_ACDIRMAX; | |
c5811dbd | 770 | data->mount_server.port = NFS_UNSPEC_PORT; |
9423a08a | 771 | data->nfs_server.port = NFS_UNSPEC_PORT; |
c5811dbd | 772 | data->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
9423a08a CL |
773 | data->auth_flavors[0] = RPC_AUTH_UNIX; |
774 | data->auth_flavor_len = 1; | |
c5811dbd | 775 | data->version = version; |
9423a08a CL |
776 | data->minorversion = 0; |
777 | } | |
778 | return data; | |
779 | } | |
780 | ||
fc50d58f | 781 | /* |
cdcd7f9a CL |
782 | * Sanity-check a server address provided by the mount command. |
783 | * | |
784 | * Address family must be initialized, and address must not be | |
785 | * the ANY address for that family. | |
fc50d58f CL |
786 | */ |
787 | static int nfs_verify_server_address(struct sockaddr *addr) | |
788 | { | |
789 | switch (addr->sa_family) { | |
790 | case AF_INET: { | |
cdcd7f9a | 791 | struct sockaddr_in *sa = (struct sockaddr_in *)addr; |
e6f1cebf | 792 | return sa->sin_addr.s_addr != htonl(INADDR_ANY); |
cdcd7f9a CL |
793 | } |
794 | case AF_INET6: { | |
795 | struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr; | |
796 | return !ipv6_addr_any(sa); | |
fc50d58f CL |
797 | } |
798 | } | |
799 | ||
53a0b9c4 | 800 | dfprintk(MOUNT, "NFS: Invalid IP address specified\n"); |
fc50d58f CL |
801 | return 0; |
802 | } | |
803 | ||
4cfd74fc CL |
804 | /* |
805 | * Select between a default port value and a user-specified port value. | |
806 | * If a zero value is set, then autobind will be used. | |
807 | */ | |
f5855fec | 808 | static void nfs_set_port(struct sockaddr *sap, int *port, |
4cfd74fc CL |
809 | const unsigned short default_port) |
810 | { | |
f5855fec TM |
811 | if (*port == NFS_UNSPEC_PORT) |
812 | *port = default_port; | |
4cfd74fc | 813 | |
f5855fec | 814 | rpc_set_port(sap, *port); |
4cfd74fc CL |
815 | } |
816 | ||
259875ef TM |
817 | /* |
818 | * Sanity check the NFS transport protocol. | |
819 | * | |
820 | */ | |
821 | static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
822 | { | |
823 | switch (mnt->nfs_server.protocol) { | |
824 | case XPRT_TRANSPORT_UDP: | |
825 | case XPRT_TRANSPORT_TCP: | |
826 | case XPRT_TRANSPORT_RDMA: | |
827 | break; | |
828 | default: | |
829 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; | |
830 | } | |
831 | } | |
832 | ||
833 | /* | |
834 | * For text based NFSv2/v3 mounts, the mount protocol transport default | |
835 | * settings should depend upon the specified NFS transport. | |
836 | */ | |
837 | static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
838 | { | |
839 | nfs_validate_transport_protocol(mnt); | |
840 | ||
841 | if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP || | |
842 | mnt->mount_server.protocol == XPRT_TRANSPORT_TCP) | |
843 | return; | |
844 | switch (mnt->nfs_server.protocol) { | |
845 | case XPRT_TRANSPORT_UDP: | |
846 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; | |
847 | break; | |
848 | case XPRT_TRANSPORT_TCP: | |
849 | case XPRT_TRANSPORT_RDMA: | |
850 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; | |
851 | } | |
852 | } | |
853 | ||
01060c89 CL |
854 | /* |
855 | * Parse the value of the 'sec=' option. | |
01060c89 CL |
856 | */ |
857 | static int nfs_parse_security_flavors(char *value, | |
858 | struct nfs_parsed_mount_data *mnt) | |
859 | { | |
860 | substring_t args[MAX_OPT_ARGS]; | |
861 | ||
862 | dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); | |
863 | ||
864 | switch (match_token(value, nfs_secflavor_tokens, args)) { | |
865 | case Opt_sec_none: | |
01060c89 CL |
866 | mnt->auth_flavors[0] = RPC_AUTH_NULL; |
867 | break; | |
868 | case Opt_sec_sys: | |
01060c89 CL |
869 | mnt->auth_flavors[0] = RPC_AUTH_UNIX; |
870 | break; | |
871 | case Opt_sec_krb5: | |
01060c89 CL |
872 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5; |
873 | break; | |
874 | case Opt_sec_krb5i: | |
01060c89 CL |
875 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I; |
876 | break; | |
877 | case Opt_sec_krb5p: | |
01060c89 CL |
878 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P; |
879 | break; | |
880 | case Opt_sec_lkey: | |
01060c89 CL |
881 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY; |
882 | break; | |
883 | case Opt_sec_lkeyi: | |
01060c89 CL |
884 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI; |
885 | break; | |
886 | case Opt_sec_lkeyp: | |
01060c89 CL |
887 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP; |
888 | break; | |
889 | case Opt_sec_spkm: | |
01060c89 CL |
890 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM; |
891 | break; | |
892 | case Opt_sec_spkmi: | |
01060c89 CL |
893 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI; |
894 | break; | |
895 | case Opt_sec_spkmp: | |
01060c89 CL |
896 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP; |
897 | break; | |
898 | default: | |
899 | return 0; | |
900 | } | |
901 | ||
059f90b3 | 902 | mnt->auth_flavor_len = 1; |
01060c89 CL |
903 | return 1; |
904 | } | |
905 | ||
bf0fd768 CL |
906 | /* |
907 | * Error-check and convert a string of mount options from user space into | |
f45663ce CL |
908 | * a data structure. The whole mount string is processed; bad options are |
909 | * skipped as they are encountered. If there were no errors, return 1; | |
910 | * otherwise return 0 (zero). | |
bf0fd768 CL |
911 | */ |
912 | static int nfs_parse_mount_options(char *raw, | |
913 | struct nfs_parsed_mount_data *mnt) | |
914 | { | |
f9c3a380 | 915 | char *p, *string, *secdata; |
d23c45fd | 916 | int rc, sloppy = 0, invalid_option = 0; |
ee671b01 JL |
917 | unsigned short protofamily = AF_UNSPEC; |
918 | unsigned short mountfamily = AF_UNSPEC; | |
bf0fd768 CL |
919 | |
920 | if (!raw) { | |
921 | dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); | |
922 | return 1; | |
923 | } | |
924 | dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); | |
925 | ||
f9c3a380 EP |
926 | secdata = alloc_secdata(); |
927 | if (!secdata) | |
928 | goto out_nomem; | |
929 | ||
930 | rc = security_sb_copy_data(raw, secdata); | |
931 | if (rc) | |
932 | goto out_security_failure; | |
933 | ||
934 | rc = security_sb_parse_opts_str(secdata, &mnt->lsm_opts); | |
935 | if (rc) | |
936 | goto out_security_failure; | |
937 | ||
938 | free_secdata(secdata); | |
939 | ||
bf0fd768 CL |
940 | while ((p = strsep(&raw, ",")) != NULL) { |
941 | substring_t args[MAX_OPT_ARGS]; | |
a5a16bae CL |
942 | unsigned long option; |
943 | int token; | |
bf0fd768 CL |
944 | |
945 | if (!*p) | |
946 | continue; | |
947 | ||
948 | dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); | |
949 | ||
950 | token = match_token(p, nfs_mount_option_tokens, args); | |
951 | switch (token) { | |
f45663ce CL |
952 | |
953 | /* | |
954 | * boolean options: foo/nofoo | |
955 | */ | |
bf0fd768 CL |
956 | case Opt_soft: |
957 | mnt->flags |= NFS_MOUNT_SOFT; | |
958 | break; | |
959 | case Opt_hard: | |
960 | mnt->flags &= ~NFS_MOUNT_SOFT; | |
961 | break; | |
bf0fd768 CL |
962 | case Opt_posix: |
963 | mnt->flags |= NFS_MOUNT_POSIX; | |
964 | break; | |
965 | case Opt_noposix: | |
966 | mnt->flags &= ~NFS_MOUNT_POSIX; | |
967 | break; | |
968 | case Opt_cto: | |
969 | mnt->flags &= ~NFS_MOUNT_NOCTO; | |
970 | break; | |
971 | case Opt_nocto: | |
972 | mnt->flags |= NFS_MOUNT_NOCTO; | |
973 | break; | |
974 | case Opt_ac: | |
975 | mnt->flags &= ~NFS_MOUNT_NOAC; | |
976 | break; | |
977 | case Opt_noac: | |
978 | mnt->flags |= NFS_MOUNT_NOAC; | |
979 | break; | |
980 | case Opt_lock: | |
981 | mnt->flags &= ~NFS_MOUNT_NONLM; | |
982 | break; | |
983 | case Opt_nolock: | |
984 | mnt->flags |= NFS_MOUNT_NONLM; | |
985 | break; | |
986 | case Opt_v2: | |
987 | mnt->flags &= ~NFS_MOUNT_VER3; | |
764302cc | 988 | mnt->version = 2; |
bf0fd768 CL |
989 | break; |
990 | case Opt_v3: | |
991 | mnt->flags |= NFS_MOUNT_VER3; | |
764302cc | 992 | mnt->version = 3; |
bf0fd768 | 993 | break; |
764302cc CL |
994 | #ifdef CONFIG_NFS_V4 |
995 | case Opt_v4: | |
996 | mnt->flags &= ~NFS_MOUNT_VER3; | |
997 | mnt->version = 4; | |
998 | break; | |
999 | #endif | |
bf0fd768 CL |
1000 | case Opt_udp: |
1001 | mnt->flags &= ~NFS_MOUNT_TCP; | |
0896a725 | 1002 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 CL |
1003 | break; |
1004 | case Opt_tcp: | |
1005 | mnt->flags |= NFS_MOUNT_TCP; | |
0896a725 | 1006 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1007 | break; |
2cf7ff7a TT |
1008 | case Opt_rdma: |
1009 | mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ | |
1010 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 1011 | xprt_load_transport(p); |
2cf7ff7a | 1012 | break; |
bf0fd768 CL |
1013 | case Opt_acl: |
1014 | mnt->flags &= ~NFS_MOUNT_NOACL; | |
1015 | break; | |
1016 | case Opt_noacl: | |
1017 | mnt->flags |= NFS_MOUNT_NOACL; | |
1018 | break; | |
1019 | case Opt_rdirplus: | |
1020 | mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; | |
1021 | break; | |
1022 | case Opt_nordirplus: | |
1023 | mnt->flags |= NFS_MOUNT_NORDIRPLUS; | |
1024 | break; | |
75180df2 TM |
1025 | case Opt_sharecache: |
1026 | mnt->flags &= ~NFS_MOUNT_UNSHARED; | |
1027 | break; | |
1028 | case Opt_nosharecache: | |
1029 | mnt->flags |= NFS_MOUNT_UNSHARED; | |
1030 | break; | |
d740351b CL |
1031 | case Opt_resvport: |
1032 | mnt->flags &= ~NFS_MOUNT_NORESVPORT; | |
1033 | break; | |
1034 | case Opt_noresvport: | |
1035 | mnt->flags |= NFS_MOUNT_NORESVPORT; | |
1036 | break; | |
b797cac7 DH |
1037 | case Opt_fscache: |
1038 | mnt->options |= NFS_OPTION_FSCACHE; | |
1039 | kfree(mnt->fscache_uniq); | |
1040 | mnt->fscache_uniq = NULL; | |
1041 | break; | |
1042 | case Opt_nofscache: | |
1043 | mnt->options &= ~NFS_OPTION_FSCACHE; | |
1044 | kfree(mnt->fscache_uniq); | |
1045 | mnt->fscache_uniq = NULL; | |
1046 | break; | |
1047 | case Opt_fscache_uniq: | |
1048 | string = match_strdup(args); | |
1049 | if (!string) | |
1050 | goto out_nomem; | |
1051 | kfree(mnt->fscache_uniq); | |
1052 | mnt->fscache_uniq = string; | |
1053 | mnt->options |= NFS_OPTION_FSCACHE; | |
1054 | break; | |
bf0fd768 | 1055 | |
f45663ce CL |
1056 | /* |
1057 | * options that take numeric values | |
1058 | */ | |
bf0fd768 | 1059 | case Opt_port: |
a5a16bae CL |
1060 | string = match_strdup(args); |
1061 | if (string == NULL) | |
1062 | goto out_nomem; | |
1063 | rc = strict_strtoul(string, 10, &option); | |
1064 | kfree(string); | |
1065 | if (rc != 0 || option > USHORT_MAX) | |
d23c45fd CL |
1066 | goto out_invalid_value; |
1067 | mnt->nfs_server.port = option; | |
bf0fd768 CL |
1068 | break; |
1069 | case Opt_rsize: | |
a5a16bae CL |
1070 | string = match_strdup(args); |
1071 | if (string == NULL) | |
1072 | goto out_nomem; | |
1073 | rc = strict_strtoul(string, 10, &option); | |
1074 | kfree(string); | |
1075 | if (rc != 0) | |
d23c45fd CL |
1076 | goto out_invalid_value; |
1077 | mnt->rsize = option; | |
bf0fd768 CL |
1078 | break; |
1079 | case Opt_wsize: | |
a5a16bae CL |
1080 | string = match_strdup(args); |
1081 | if (string == NULL) | |
1082 | goto out_nomem; | |
1083 | rc = strict_strtoul(string, 10, &option); | |
1084 | kfree(string); | |
1085 | if (rc != 0) | |
d23c45fd CL |
1086 | goto out_invalid_value; |
1087 | mnt->wsize = option; | |
bf0fd768 CL |
1088 | break; |
1089 | case Opt_bsize: | |
a5a16bae CL |
1090 | string = match_strdup(args); |
1091 | if (string == NULL) | |
1092 | goto out_nomem; | |
1093 | rc = strict_strtoul(string, 10, &option); | |
1094 | kfree(string); | |
1095 | if (rc != 0) | |
d23c45fd CL |
1096 | goto out_invalid_value; |
1097 | mnt->bsize = option; | |
bf0fd768 CL |
1098 | break; |
1099 | case Opt_timeo: | |
a5a16bae CL |
1100 | string = match_strdup(args); |
1101 | if (string == NULL) | |
1102 | goto out_nomem; | |
1103 | rc = strict_strtoul(string, 10, &option); | |
1104 | kfree(string); | |
1105 | if (rc != 0 || option == 0) | |
d23c45fd CL |
1106 | goto out_invalid_value; |
1107 | mnt->timeo = option; | |
bf0fd768 CL |
1108 | break; |
1109 | case Opt_retrans: | |
a5a16bae CL |
1110 | string = match_strdup(args); |
1111 | if (string == NULL) | |
1112 | goto out_nomem; | |
1113 | rc = strict_strtoul(string, 10, &option); | |
1114 | kfree(string); | |
1115 | if (rc != 0 || option == 0) | |
d23c45fd CL |
1116 | goto out_invalid_value; |
1117 | mnt->retrans = option; | |
bf0fd768 CL |
1118 | break; |
1119 | case Opt_acregmin: | |
a5a16bae CL |
1120 | string = match_strdup(args); |
1121 | if (string == NULL) | |
1122 | goto out_nomem; | |
1123 | rc = strict_strtoul(string, 10, &option); | |
1124 | kfree(string); | |
1125 | if (rc != 0) | |
d23c45fd CL |
1126 | goto out_invalid_value; |
1127 | mnt->acregmin = option; | |
bf0fd768 CL |
1128 | break; |
1129 | case Opt_acregmax: | |
a5a16bae CL |
1130 | string = match_strdup(args); |
1131 | if (string == NULL) | |
1132 | goto out_nomem; | |
1133 | rc = strict_strtoul(string, 10, &option); | |
1134 | kfree(string); | |
1135 | if (rc != 0) | |
d23c45fd CL |
1136 | goto out_invalid_value; |
1137 | mnt->acregmax = option; | |
bf0fd768 CL |
1138 | break; |
1139 | case Opt_acdirmin: | |
a5a16bae CL |
1140 | string = match_strdup(args); |
1141 | if (string == NULL) | |
1142 | goto out_nomem; | |
1143 | rc = strict_strtoul(string, 10, &option); | |
1144 | kfree(string); | |
1145 | if (rc != 0) | |
d23c45fd CL |
1146 | goto out_invalid_value; |
1147 | mnt->acdirmin = option; | |
bf0fd768 CL |
1148 | break; |
1149 | case Opt_acdirmax: | |
a5a16bae CL |
1150 | string = match_strdup(args); |
1151 | if (string == NULL) | |
1152 | goto out_nomem; | |
1153 | rc = strict_strtoul(string, 10, &option); | |
1154 | kfree(string); | |
1155 | if (rc != 0) | |
d23c45fd CL |
1156 | goto out_invalid_value; |
1157 | mnt->acdirmax = option; | |
bf0fd768 CL |
1158 | break; |
1159 | case Opt_actimeo: | |
a5a16bae CL |
1160 | string = match_strdup(args); |
1161 | if (string == NULL) | |
1162 | goto out_nomem; | |
1163 | rc = strict_strtoul(string, 10, &option); | |
1164 | kfree(string); | |
1165 | if (rc != 0) | |
d23c45fd CL |
1166 | goto out_invalid_value; |
1167 | mnt->acregmin = mnt->acregmax = | |
1168 | mnt->acdirmin = mnt->acdirmax = option; | |
bf0fd768 CL |
1169 | break; |
1170 | case Opt_namelen: | |
a5a16bae CL |
1171 | string = match_strdup(args); |
1172 | if (string == NULL) | |
1173 | goto out_nomem; | |
1174 | rc = strict_strtoul(string, 10, &option); | |
1175 | kfree(string); | |
1176 | if (rc != 0) | |
d23c45fd CL |
1177 | goto out_invalid_value; |
1178 | mnt->namlen = option; | |
bf0fd768 CL |
1179 | break; |
1180 | case Opt_mountport: | |
a5a16bae CL |
1181 | string = match_strdup(args); |
1182 | if (string == NULL) | |
1183 | goto out_nomem; | |
1184 | rc = strict_strtoul(string, 10, &option); | |
1185 | kfree(string); | |
1186 | if (rc != 0 || option > USHORT_MAX) | |
d23c45fd CL |
1187 | goto out_invalid_value; |
1188 | mnt->mount_server.port = option; | |
bf0fd768 | 1189 | break; |
bf0fd768 | 1190 | case Opt_mountvers: |
a5a16bae CL |
1191 | string = match_strdup(args); |
1192 | if (string == NULL) | |
1193 | goto out_nomem; | |
1194 | rc = strict_strtoul(string, 10, &option); | |
1195 | kfree(string); | |
1196 | if (rc != 0 || | |
f45663ce | 1197 | option < NFS_MNT_VERSION || |
d23c45fd CL |
1198 | option > NFS_MNT3_VERSION) |
1199 | goto out_invalid_value; | |
1200 | mnt->mount_server.version = option; | |
bf0fd768 | 1201 | break; |
bf0fd768 | 1202 | case Opt_nfsvers: |
a5a16bae CL |
1203 | string = match_strdup(args); |
1204 | if (string == NULL) | |
1205 | goto out_nomem; | |
1206 | rc = strict_strtoul(string, 10, &option); | |
1207 | kfree(string); | |
1208 | if (rc != 0) | |
d23c45fd | 1209 | goto out_invalid_value; |
bf0fd768 | 1210 | switch (option) { |
f45663ce | 1211 | case NFS2_VERSION: |
bf0fd768 | 1212 | mnt->flags &= ~NFS_MOUNT_VER3; |
764302cc | 1213 | mnt->version = 2; |
bf0fd768 | 1214 | break; |
f45663ce | 1215 | case NFS3_VERSION: |
bf0fd768 | 1216 | mnt->flags |= NFS_MOUNT_VER3; |
764302cc CL |
1217 | mnt->version = 3; |
1218 | break; | |
1219 | #ifdef CONFIG_NFS_V4 | |
1220 | case NFS4_VERSION: | |
1221 | mnt->flags &= ~NFS_MOUNT_VER3; | |
1222 | mnt->version = 4; | |
bf0fd768 | 1223 | break; |
764302cc | 1224 | #endif |
bf0fd768 | 1225 | default: |
d23c45fd | 1226 | goto out_invalid_value; |
bf0fd768 CL |
1227 | } |
1228 | break; | |
3fd5be9e | 1229 | case Opt_minorversion: |
f3f4f4ed CL |
1230 | string = match_strdup(args); |
1231 | if (string == NULL) | |
1232 | goto out_nomem; | |
1233 | rc = strict_strtoul(string, 10, &option); | |
1234 | kfree(string); | |
1235 | if (rc != 0) | |
1236 | goto out_invalid_value; | |
1237 | if (option > NFS4_MAX_MINOR_VERSION) | |
1238 | goto out_invalid_value; | |
1239 | mnt->minorversion = option; | |
3fd5be9e | 1240 | break; |
bf0fd768 | 1241 | |
f45663ce CL |
1242 | /* |
1243 | * options that take text values | |
1244 | */ | |
bf0fd768 CL |
1245 | case Opt_sec: |
1246 | string = match_strdup(args); | |
1247 | if (string == NULL) | |
1248 | goto out_nomem; | |
01060c89 | 1249 | rc = nfs_parse_security_flavors(string, mnt); |
bf0fd768 | 1250 | kfree(string); |
f45663ce | 1251 | if (!rc) { |
f45663ce CL |
1252 | dfprintk(MOUNT, "NFS: unrecognized " |
1253 | "security flavor\n"); | |
d23c45fd | 1254 | return 0; |
f45663ce | 1255 | } |
bf0fd768 CL |
1256 | break; |
1257 | case Opt_proto: | |
1258 | string = match_strdup(args); | |
1259 | if (string == NULL) | |
1260 | goto out_nomem; | |
1261 | token = match_token(string, | |
1262 | nfs_xprt_protocol_tokens, args); | |
bf0fd768 | 1263 | |
ee671b01 | 1264 | protofamily = AF_INET; |
bf0fd768 | 1265 | switch (token) { |
ee671b01 JL |
1266 | case Opt_xprt_udp6: |
1267 | protofamily = AF_INET6; | |
fdb66ff4 | 1268 | case Opt_xprt_udp: |
bf0fd768 | 1269 | mnt->flags &= ~NFS_MOUNT_TCP; |
0896a725 | 1270 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
d23c45fd | 1271 | kfree(string); |
bf0fd768 | 1272 | break; |
ee671b01 JL |
1273 | case Opt_xprt_tcp6: |
1274 | protofamily = AF_INET6; | |
fdb66ff4 | 1275 | case Opt_xprt_tcp: |
bf0fd768 | 1276 | mnt->flags |= NFS_MOUNT_TCP; |
0896a725 | 1277 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
d23c45fd | 1278 | kfree(string); |
bf0fd768 | 1279 | break; |
2cf7ff7a TT |
1280 | case Opt_xprt_rdma: |
1281 | /* vector side protocols to TCP */ | |
1282 | mnt->flags |= NFS_MOUNT_TCP; | |
1283 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 1284 | xprt_load_transport(string); |
d23c45fd | 1285 | kfree(string); |
2cf7ff7a | 1286 | break; |
bf0fd768 | 1287 | default: |
f45663ce CL |
1288 | dfprintk(MOUNT, "NFS: unrecognized " |
1289 | "transport protocol\n"); | |
4223a4a1 | 1290 | kfree(string); |
d23c45fd | 1291 | return 0; |
bf0fd768 CL |
1292 | } |
1293 | break; | |
1294 | case Opt_mountproto: | |
1295 | string = match_strdup(args); | |
1296 | if (string == NULL) | |
1297 | goto out_nomem; | |
1298 | token = match_token(string, | |
1299 | nfs_xprt_protocol_tokens, args); | |
d508afb4 | 1300 | kfree(string); |
bf0fd768 | 1301 | |
ee671b01 | 1302 | mountfamily = AF_INET; |
bf0fd768 | 1303 | switch (token) { |
ee671b01 JL |
1304 | case Opt_xprt_udp6: |
1305 | mountfamily = AF_INET6; | |
fdb66ff4 | 1306 | case Opt_xprt_udp: |
0896a725 | 1307 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 | 1308 | break; |
ee671b01 JL |
1309 | case Opt_xprt_tcp6: |
1310 | mountfamily = AF_INET6; | |
fdb66ff4 | 1311 | case Opt_xprt_tcp: |
0896a725 | 1312 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1313 | break; |
2cf7ff7a | 1314 | case Opt_xprt_rdma: /* not used for side protocols */ |
bf0fd768 | 1315 | default: |
f45663ce CL |
1316 | dfprintk(MOUNT, "NFS: unrecognized " |
1317 | "transport protocol\n"); | |
d23c45fd | 1318 | return 0; |
bf0fd768 CL |
1319 | } |
1320 | break; | |
1321 | case Opt_addr: | |
1322 | string = match_strdup(args); | |
1323 | if (string == NULL) | |
1324 | goto out_nomem; | |
53a0b9c4 CL |
1325 | mnt->nfs_server.addrlen = |
1326 | rpc_pton(string, strlen(string), | |
1327 | (struct sockaddr *) | |
1328 | &mnt->nfs_server.address, | |
1329 | sizeof(mnt->nfs_server.address)); | |
bf0fd768 | 1330 | kfree(string); |
53a0b9c4 CL |
1331 | if (mnt->nfs_server.addrlen == 0) |
1332 | goto out_invalid_address; | |
bf0fd768 CL |
1333 | break; |
1334 | case Opt_clientaddr: | |
1335 | string = match_strdup(args); | |
1336 | if (string == NULL) | |
1337 | goto out_nomem; | |
fc601477 | 1338 | kfree(mnt->client_address); |
bf0fd768 CL |
1339 | mnt->client_address = string; |
1340 | break; | |
33832034 CL |
1341 | case Opt_mounthost: |
1342 | string = match_strdup(args); | |
1343 | if (string == NULL) | |
1344 | goto out_nomem; | |
fc601477 | 1345 | kfree(mnt->mount_server.hostname); |
33832034 CL |
1346 | mnt->mount_server.hostname = string; |
1347 | break; | |
0ac83779 | 1348 | case Opt_mountaddr: |
bf0fd768 CL |
1349 | string = match_strdup(args); |
1350 | if (string == NULL) | |
1351 | goto out_nomem; | |
53a0b9c4 CL |
1352 | mnt->mount_server.addrlen = |
1353 | rpc_pton(string, strlen(string), | |
1354 | (struct sockaddr *) | |
1355 | &mnt->mount_server.address, | |
1356 | sizeof(mnt->mount_server.address)); | |
bf0fd768 | 1357 | kfree(string); |
53a0b9c4 CL |
1358 | if (mnt->mount_server.addrlen == 0) |
1359 | goto out_invalid_address; | |
bf0fd768 | 1360 | break; |
7973c1f1 TM |
1361 | case Opt_lookupcache: |
1362 | string = match_strdup(args); | |
1363 | if (string == NULL) | |
1364 | goto out_nomem; | |
1365 | token = match_token(string, | |
1366 | nfs_lookupcache_tokens, args); | |
1367 | kfree(string); | |
1368 | switch (token) { | |
1369 | case Opt_lookupcache_all: | |
1370 | mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); | |
1371 | break; | |
1372 | case Opt_lookupcache_positive: | |
1373 | mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1374 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; | |
1375 | break; | |
1376 | case Opt_lookupcache_none: | |
1377 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1378 | break; | |
1379 | default: | |
7973c1f1 TM |
1380 | dfprintk(MOUNT, "NFS: invalid " |
1381 | "lookupcache argument\n"); | |
d23c45fd | 1382 | return 0; |
7973c1f1 TM |
1383 | }; |
1384 | break; | |
bf0fd768 | 1385 | |
f45663ce CL |
1386 | /* |
1387 | * Special options | |
1388 | */ | |
1389 | case Opt_sloppy: | |
1390 | sloppy = 1; | |
1391 | dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); | |
1392 | break; | |
bf0fd768 CL |
1393 | case Opt_userspace: |
1394 | case Opt_deprecated: | |
d33e4dfe CL |
1395 | dfprintk(MOUNT, "NFS: ignoring mount option " |
1396 | "'%s'\n", p); | |
bf0fd768 CL |
1397 | break; |
1398 | ||
1399 | default: | |
d23c45fd | 1400 | invalid_option = 1; |
f45663ce CL |
1401 | dfprintk(MOUNT, "NFS: unrecognized mount option " |
1402 | "'%s'\n", p); | |
bf0fd768 CL |
1403 | } |
1404 | } | |
1405 | ||
d23c45fd CL |
1406 | if (!sloppy && invalid_option) |
1407 | return 0; | |
1408 | ||
ee671b01 JL |
1409 | /* |
1410 | * verify that any proto=/mountproto= options match the address | |
1411 | * familiies in the addr=/mountaddr= options. | |
1412 | */ | |
1413 | if (protofamily != AF_UNSPEC && | |
1414 | protofamily != mnt->nfs_server.address.ss_family) | |
1415 | goto out_proto_mismatch; | |
1416 | ||
1417 | if (mountfamily != AF_UNSPEC) { | |
1418 | if (mnt->mount_server.addrlen) { | |
1419 | if (mountfamily != mnt->mount_server.address.ss_family) | |
1420 | goto out_mountproto_mismatch; | |
1421 | } else { | |
1422 | if (mountfamily != mnt->nfs_server.address.ss_family) | |
1423 | goto out_mountproto_mismatch; | |
1424 | } | |
1425 | } | |
1426 | ||
bf0fd768 CL |
1427 | return 1; |
1428 | ||
ee671b01 JL |
1429 | out_mountproto_mismatch: |
1430 | printk(KERN_INFO "NFS: mount server address does not match mountproto= " | |
1431 | "option\n"); | |
1432 | return 0; | |
1433 | out_proto_mismatch: | |
1434 | printk(KERN_INFO "NFS: server address does not match proto= option\n"); | |
1435 | return 0; | |
53a0b9c4 CL |
1436 | out_invalid_address: |
1437 | printk(KERN_INFO "NFS: bad IP address specified: %s\n", p); | |
1438 | return 0; | |
d23c45fd | 1439 | out_invalid_value: |
53a0b9c4 | 1440 | printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); |
d23c45fd | 1441 | return 0; |
bf0fd768 CL |
1442 | out_nomem: |
1443 | printk(KERN_INFO "NFS: not enough memory to parse option\n"); | |
1444 | return 0; | |
f9c3a380 EP |
1445 | out_security_failure: |
1446 | free_secdata(secdata); | |
1447 | printk(KERN_INFO "NFS: security options invalid: %d\n", rc); | |
1448 | return 0; | |
bf0fd768 CL |
1449 | } |
1450 | ||
ec88f28d CL |
1451 | /* |
1452 | * Match the requested auth flavors with the list returned by | |
1453 | * the server. Returns zero and sets the mount's authentication | |
1454 | * flavor on success; returns -EACCES if server does not support | |
1455 | * the requested flavor. | |
1456 | */ | |
1457 | static int nfs_walk_authlist(struct nfs_parsed_mount_data *args, | |
1458 | struct nfs_mount_request *request) | |
1459 | { | |
1460 | unsigned int i, j, server_authlist_len = *(request->auth_flav_len); | |
1461 | ||
5eecfde6 CL |
1462 | /* |
1463 | * Certain releases of Linux's mountd return an empty | |
1464 | * flavor list. To prevent behavioral regression with | |
1465 | * these servers (ie. rejecting mounts that used to | |
1466 | * succeed), revert to pre-2.6.32 behavior (no checking) | |
1467 | * if the returned flavor list is empty. | |
1468 | */ | |
1469 | if (server_authlist_len == 0) | |
1470 | return 0; | |
1471 | ||
ec88f28d CL |
1472 | /* |
1473 | * We avoid sophisticated negotiating here, as there are | |
1474 | * plenty of cases where we can get it wrong, providing | |
1475 | * either too little or too much security. | |
1476 | * | |
1477 | * RFC 2623, section 2.7 suggests we SHOULD prefer the | |
1478 | * flavor listed first. However, some servers list | |
1479 | * AUTH_NULL first. Our caller plants AUTH_SYS, the | |
1480 | * preferred default, in args->auth_flavors[0] if user | |
1481 | * didn't specify sec= mount option. | |
1482 | */ | |
1483 | for (i = 0; i < args->auth_flavor_len; i++) | |
1484 | for (j = 0; j < server_authlist_len; j++) | |
1485 | if (args->auth_flavors[i] == request->auth_flavs[j]) { | |
1486 | dfprintk(MOUNT, "NFS: using auth flavor %d\n", | |
1487 | request->auth_flavs[j]); | |
1488 | args->auth_flavors[0] = request->auth_flavs[j]; | |
1489 | return 0; | |
1490 | } | |
1491 | ||
1492 | dfprintk(MOUNT, "NFS: server does not support requested auth flavor\n"); | |
1493 | nfs_umount(request); | |
1494 | return -EACCES; | |
1495 | } | |
1496 | ||
0076d7b7 CL |
1497 | /* |
1498 | * Use the remote server's MOUNT service to request the NFS file handle | |
1499 | * corresponding to the provided path. | |
1500 | */ | |
1501 | static int nfs_try_mount(struct nfs_parsed_mount_data *args, | |
1502 | struct nfs_fh *root_fh) | |
1503 | { | |
ec88f28d CL |
1504 | rpc_authflavor_t server_authlist[NFS_MAX_SECFLAVORS]; |
1505 | unsigned int server_authlist_len = ARRAY_SIZE(server_authlist); | |
c5d120f8 CL |
1506 | struct nfs_mount_request request = { |
1507 | .sap = (struct sockaddr *) | |
1508 | &args->mount_server.address, | |
1509 | .dirpath = args->nfs_server.export_path, | |
1510 | .protocol = args->mount_server.protocol, | |
1511 | .fh = root_fh, | |
50a737f8 | 1512 | .noresvport = args->flags & NFS_MOUNT_NORESVPORT, |
ec88f28d CL |
1513 | .auth_flav_len = &server_authlist_len, |
1514 | .auth_flavs = server_authlist, | |
c5d120f8 | 1515 | }; |
4c568017 | 1516 | int status; |
0076d7b7 CL |
1517 | |
1518 | if (args->mount_server.version == 0) { | |
8a6e5deb TM |
1519 | switch (args->version) { |
1520 | default: | |
1521 | args->mount_server.version = NFS_MNT3_VERSION; | |
1522 | break; | |
1523 | case 2: | |
1524 | args->mount_server.version = NFS_MNT_VERSION; | |
1525 | } | |
0076d7b7 | 1526 | } |
c5d120f8 | 1527 | request.version = args->mount_server.version; |
0076d7b7 | 1528 | |
33832034 | 1529 | if (args->mount_server.hostname) |
c5d120f8 | 1530 | request.hostname = args->mount_server.hostname; |
33832034 | 1531 | else |
c5d120f8 | 1532 | request.hostname = args->nfs_server.hostname; |
33832034 | 1533 | |
0076d7b7 CL |
1534 | /* |
1535 | * Construct the mount server's address. | |
1536 | */ | |
4c568017 | 1537 | if (args->mount_server.address.ss_family == AF_UNSPEC) { |
c5d120f8 | 1538 | memcpy(request.sap, &args->nfs_server.address, |
4c568017 CL |
1539 | args->nfs_server.addrlen); |
1540 | args->mount_server.addrlen = args->nfs_server.addrlen; | |
1541 | } | |
c5d120f8 | 1542 | request.salen = args->mount_server.addrlen; |
f5855fec | 1543 | nfs_set_port(request.sap, &args->mount_server.port, 0); |
0076d7b7 CL |
1544 | |
1545 | /* | |
1546 | * Now ask the mount server to map our export path | |
1547 | * to a file handle. | |
1548 | */ | |
c5d120f8 | 1549 | status = nfs_mount(&request); |
ec88f28d CL |
1550 | if (status != 0) { |
1551 | dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n", | |
1552 | request.hostname, status); | |
1553 | return status; | |
1554 | } | |
0076d7b7 | 1555 | |
ec88f28d CL |
1556 | /* |
1557 | * MNTv1 (NFSv2) does not support auth flavor negotiation. | |
1558 | */ | |
1559 | if (args->mount_server.version != NFS_MNT3_VERSION) | |
1560 | return 0; | |
1561 | return nfs_walk_authlist(args, &request); | |
0076d7b7 CL |
1562 | } |
1563 | ||
d1aa0825 CL |
1564 | static int nfs_parse_simple_hostname(const char *dev_name, |
1565 | char **hostname, size_t maxnamlen, | |
1566 | char **export_path, size_t maxpathlen) | |
dc045898 CL |
1567 | { |
1568 | size_t len; | |
1569 | char *colon, *comma; | |
1570 | ||
1571 | colon = strchr(dev_name, ':'); | |
1572 | if (colon == NULL) | |
1573 | goto out_bad_devname; | |
1574 | ||
1575 | len = colon - dev_name; | |
1576 | if (len > maxnamlen) | |
1577 | goto out_hostname; | |
1578 | ||
1579 | /* N.B. caller will free nfs_server.hostname in all cases */ | |
1580 | *hostname = kstrndup(dev_name, len, GFP_KERNEL); | |
1581 | if (!*hostname) | |
1582 | goto out_nomem; | |
1583 | ||
1584 | /* kill possible hostname list: not supported */ | |
1585 | comma = strchr(*hostname, ','); | |
1586 | if (comma != NULL) { | |
1587 | if (comma == *hostname) | |
1588 | goto out_bad_devname; | |
1589 | *comma = '\0'; | |
1590 | } | |
1591 | ||
1592 | colon++; | |
1593 | len = strlen(colon); | |
1594 | if (len > maxpathlen) | |
1595 | goto out_path; | |
1596 | *export_path = kstrndup(colon, len, GFP_KERNEL); | |
1597 | if (!*export_path) | |
1598 | goto out_nomem; | |
1599 | ||
1600 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path); | |
1601 | return 0; | |
1602 | ||
1603 | out_bad_devname: | |
1604 | dfprintk(MOUNT, "NFS: device name not in host:path format\n"); | |
1605 | return -EINVAL; | |
1606 | ||
1607 | out_nomem: | |
1608 | dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); | |
1609 | return -ENOMEM; | |
1610 | ||
1611 | out_hostname: | |
1612 | dfprintk(MOUNT, "NFS: server hostname too long\n"); | |
1613 | return -ENAMETOOLONG; | |
1614 | ||
1615 | out_path: | |
1616 | dfprintk(MOUNT, "NFS: export pathname too long\n"); | |
1617 | return -ENAMETOOLONG; | |
1618 | } | |
1619 | ||
d1aa0825 CL |
1620 | /* |
1621 | * Hostname has square brackets around it because it contains one or | |
1622 | * more colons. We look for the first closing square bracket, and a | |
1623 | * colon must follow it. | |
1624 | */ | |
1625 | static int nfs_parse_protected_hostname(const char *dev_name, | |
1626 | char **hostname, size_t maxnamlen, | |
1627 | char **export_path, size_t maxpathlen) | |
1628 | { | |
1629 | size_t len; | |
1630 | char *start, *end; | |
1631 | ||
1632 | start = (char *)(dev_name + 1); | |
1633 | ||
1634 | end = strchr(start, ']'); | |
1635 | if (end == NULL) | |
1636 | goto out_bad_devname; | |
1637 | if (*(end + 1) != ':') | |
1638 | goto out_bad_devname; | |
1639 | ||
1640 | len = end - start; | |
1641 | if (len > maxnamlen) | |
1642 | goto out_hostname; | |
1643 | ||
1644 | /* N.B. caller will free nfs_server.hostname in all cases */ | |
1645 | *hostname = kstrndup(start, len, GFP_KERNEL); | |
1646 | if (*hostname == NULL) | |
1647 | goto out_nomem; | |
1648 | ||
1649 | end += 2; | |
1650 | len = strlen(end); | |
1651 | if (len > maxpathlen) | |
1652 | goto out_path; | |
1653 | *export_path = kstrndup(end, len, GFP_KERNEL); | |
1654 | if (!*export_path) | |
1655 | goto out_nomem; | |
1656 | ||
1657 | return 0; | |
1658 | ||
1659 | out_bad_devname: | |
1660 | dfprintk(MOUNT, "NFS: device name not in host:path format\n"); | |
1661 | return -EINVAL; | |
1662 | ||
1663 | out_nomem: | |
1664 | dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); | |
1665 | return -ENOMEM; | |
1666 | ||
1667 | out_hostname: | |
1668 | dfprintk(MOUNT, "NFS: server hostname too long\n"); | |
1669 | return -ENAMETOOLONG; | |
1670 | ||
1671 | out_path: | |
1672 | dfprintk(MOUNT, "NFS: export pathname too long\n"); | |
1673 | return -ENAMETOOLONG; | |
1674 | } | |
1675 | ||
1676 | /* | |
1677 | * Split "dev_name" into "hostname:export_path". | |
1678 | * | |
1679 | * The leftmost colon demarks the split between the server's hostname | |
1680 | * and the export path. If the hostname starts with a left square | |
1681 | * bracket, then it may contain colons. | |
1682 | * | |
1683 | * Note: caller frees hostname and export path, even on error. | |
1684 | */ | |
1685 | static int nfs_parse_devname(const char *dev_name, | |
1686 | char **hostname, size_t maxnamlen, | |
1687 | char **export_path, size_t maxpathlen) | |
1688 | { | |
1689 | if (*dev_name == '[') | |
1690 | return nfs_parse_protected_hostname(dev_name, | |
1691 | hostname, maxnamlen, | |
1692 | export_path, maxpathlen); | |
1693 | ||
1694 | return nfs_parse_simple_hostname(dev_name, | |
1695 | hostname, maxnamlen, | |
1696 | export_path, maxpathlen); | |
1697 | } | |
1698 | ||
f7b422b1 | 1699 | /* |
54ceac45 DH |
1700 | * Validate the NFS2/NFS3 mount data |
1701 | * - fills in the mount root filehandle | |
136d558c CL |
1702 | * |
1703 | * For option strings, user space handles the following behaviors: | |
1704 | * | |
1705 | * + DNS: mapping server host name to IP address ("addr=" option) | |
1706 | * | |
1707 | * + failure mode: how to behave if a mount request can't be handled | |
1708 | * immediately ("fg/bg" option) | |
1709 | * | |
1710 | * + retry: how often to retry a mount request ("retry=" option) | |
1711 | * | |
1712 | * + breaking back: trying proto=udp after proto=tcp, v2 after v3, | |
1713 | * mountproto=tcp after mountproto=udp, and so on | |
f7b422b1 | 1714 | */ |
2283f8d6 TT |
1715 | static int nfs_validate_mount_data(void *options, |
1716 | struct nfs_parsed_mount_data *args, | |
136d558c CL |
1717 | struct nfs_fh *mntfh, |
1718 | const char *dev_name) | |
f7b422b1 | 1719 | { |
2283f8d6 | 1720 | struct nfs_mount_data *data = (struct nfs_mount_data *)options; |
4cfd74fc | 1721 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; |
136d558c | 1722 | |
5df36e78 CL |
1723 | if (data == NULL) |
1724 | goto out_no_data; | |
f7b422b1 | 1725 | |
54ceac45 | 1726 | switch (data->version) { |
5df36e78 CL |
1727 | case 1: |
1728 | data->namlen = 0; | |
1729 | case 2: | |
1730 | data->bsize = 0; | |
1731 | case 3: | |
1732 | if (data->flags & NFS_MOUNT_VER3) | |
1733 | goto out_no_v3; | |
1734 | data->root.size = NFS2_FHSIZE; | |
1735 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
1736 | case 4: | |
1737 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1738 | goto out_no_sec; | |
1739 | case 5: | |
1740 | memset(data->context, 0, sizeof(data->context)); | |
1741 | case 6: | |
b7e24457 TM |
1742 | if (data->flags & NFS_MOUNT_VER3) { |
1743 | if (data->root.size > NFS3_FHSIZE || data->root.size == 0) | |
1744 | goto out_invalid_fh; | |
5df36e78 | 1745 | mntfh->size = data->root.size; |
764302cc CL |
1746 | args->version = 3; |
1747 | } else { | |
5df36e78 | 1748 | mntfh->size = NFS2_FHSIZE; |
764302cc CL |
1749 | args->version = 2; |
1750 | } | |
5df36e78 | 1751 | |
5df36e78 CL |
1752 | |
1753 | memcpy(mntfh->data, data->root.data, mntfh->size); | |
1754 | if (mntfh->size < sizeof(mntfh->data)) | |
1755 | memset(mntfh->data + mntfh->size, 0, | |
1756 | sizeof(mntfh->data) - mntfh->size); | |
6e88e061 | 1757 | |
2283f8d6 TT |
1758 | /* |
1759 | * Translate to nfs_parsed_mount_data, which nfs_fill_super | |
1760 | * can deal with. | |
1761 | */ | |
ff3525a5 | 1762 | args->flags = data->flags & NFS_MOUNT_FLAGMASK; |
2283f8d6 TT |
1763 | args->rsize = data->rsize; |
1764 | args->wsize = data->wsize; | |
2283f8d6 TT |
1765 | args->timeo = data->timeo; |
1766 | args->retrans = data->retrans; | |
1767 | args->acregmin = data->acregmin; | |
1768 | args->acregmax = data->acregmax; | |
1769 | args->acdirmin = data->acdirmin; | |
1770 | args->acdirmax = data->acdirmax; | |
4c568017 | 1771 | |
4cfd74fc | 1772 | memcpy(sap, &data->addr, sizeof(data->addr)); |
4c568017 | 1773 | args->nfs_server.addrlen = sizeof(data->addr); |
4cfd74fc | 1774 | if (!nfs_verify_server_address(sap)) |
4c568017 CL |
1775 | goto out_no_address; |
1776 | ||
2283f8d6 | 1777 | if (!(data->flags & NFS_MOUNT_TCP)) |
0896a725 | 1778 | args->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
2283f8d6 TT |
1779 | /* N.B. caller will free nfs_server.hostname in all cases */ |
1780 | args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); | |
1781 | args->namlen = data->namlen; | |
1782 | args->bsize = data->bsize; | |
dd07c947 CL |
1783 | |
1784 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1785 | args->auth_flavors[0] = data->pseudoflavor; | |
63649bd7 CG |
1786 | if (!args->nfs_server.hostname) |
1787 | goto out_nomem; | |
f9c3a380 EP |
1788 | |
1789 | /* | |
1790 | * The legacy version 6 binary mount data from userspace has a | |
1791 | * field used only to transport selinux information into the | |
1792 | * the kernel. To continue to support that functionality we | |
1793 | * have a touch of selinux knowledge here in the NFS code. The | |
1794 | * userspace code converted context=blah to just blah so we are | |
1795 | * converting back to the full string selinux understands. | |
1796 | */ | |
1797 | if (data->context[0]){ | |
1798 | #ifdef CONFIG_SECURITY_SELINUX | |
1799 | int rc; | |
1800 | char *opts_str = kmalloc(sizeof(data->context) + 8, GFP_KERNEL); | |
1801 | if (!opts_str) | |
1802 | return -ENOMEM; | |
1803 | strcpy(opts_str, "context="); | |
1804 | data->context[NFS_MAX_CONTEXT_LEN] = '\0'; | |
1805 | strcat(opts_str, &data->context[0]); | |
1806 | rc = security_sb_parse_opts_str(opts_str, &args->lsm_opts); | |
1807 | kfree(opts_str); | |
1808 | if (rc) | |
1809 | return rc; | |
1810 | #else | |
1811 | return -EINVAL; | |
1812 | #endif | |
1813 | } | |
1814 | ||
5df36e78 | 1815 | break; |
136d558c | 1816 | default: { |
136d558c | 1817 | int status; |
136d558c | 1818 | |
2283f8d6 TT |
1819 | if (nfs_parse_mount_options((char *)options, args) == 0) |
1820 | return -EINVAL; | |
136d558c | 1821 | |
4cfd74fc | 1822 | if (!nfs_verify_server_address(sap)) |
6e88e061 CL |
1823 | goto out_no_address; |
1824 | ||
764302cc CL |
1825 | if (args->version == 4) |
1826 | #ifdef CONFIG_NFS_V4 | |
1827 | return nfs4_validate_text_mount_data(options, | |
1828 | args, dev_name); | |
1829 | #else | |
1830 | goto out_v4_not_compiled; | |
1831 | #endif | |
1832 | ||
f5855fec | 1833 | nfs_set_port(sap, &args->nfs_server.port, 0); |
ed596a8a | 1834 | |
259875ef TM |
1835 | nfs_set_mount_transport_protocol(args); |
1836 | ||
dc045898 CL |
1837 | status = nfs_parse_devname(dev_name, |
1838 | &args->nfs_server.hostname, | |
1839 | PAGE_SIZE, | |
1840 | &args->nfs_server.export_path, | |
1841 | NFS_MAXPATHLEN); | |
1842 | if (!status) | |
1843 | status = nfs_try_mount(args, mntfh); | |
136d558c | 1844 | |
dc045898 CL |
1845 | kfree(args->nfs_server.export_path); |
1846 | args->nfs_server.export_path = NULL; | |
136d558c | 1847 | |
136d558c | 1848 | if (status) |
fdc6e2c8 | 1849 | return status; |
136d558c | 1850 | |
136d558c CL |
1851 | break; |
1852 | } | |
f7b422b1 | 1853 | } |
54ceac45 DH |
1854 | |
1855 | #ifndef CONFIG_NFS_V3 | |
8a6e5deb | 1856 | if (args->version == 3) |
5df36e78 CL |
1857 | goto out_v3_not_compiled; |
1858 | #endif /* !CONFIG_NFS_V3 */ | |
f7b422b1 | 1859 | |
5df36e78 | 1860 | return 0; |
f7b422b1 | 1861 | |
5df36e78 CL |
1862 | out_no_data: |
1863 | dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); | |
1864 | return -EINVAL; | |
54ceac45 | 1865 | |
5df36e78 CL |
1866 | out_no_v3: |
1867 | dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", | |
1868 | data->version); | |
1869 | return -EINVAL; | |
f7b422b1 | 1870 | |
5df36e78 CL |
1871 | out_no_sec: |
1872 | dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); | |
1873 | return -EINVAL; | |
1874 | ||
5df36e78 CL |
1875 | #ifndef CONFIG_NFS_V3 |
1876 | out_v3_not_compiled: | |
1877 | dfprintk(MOUNT, "NFS: NFSv3 is not compiled into kernel\n"); | |
1878 | return -EPROTONOSUPPORT; | |
1879 | #endif /* !CONFIG_NFS_V3 */ | |
1880 | ||
764302cc CL |
1881 | #ifndef CONFIG_NFS_V4 |
1882 | out_v4_not_compiled: | |
1883 | dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); | |
1884 | return -EPROTONOSUPPORT; | |
1885 | #endif /* !CONFIG_NFS_V4 */ | |
1886 | ||
63649bd7 CG |
1887 | out_nomem: |
1888 | dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); | |
1889 | return -ENOMEM; | |
1890 | ||
5df36e78 CL |
1891 | out_no_address: |
1892 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); | |
1893 | return -EINVAL; | |
1894 | ||
1895 | out_invalid_fh: | |
1896 | dfprintk(MOUNT, "NFS: invalid root filehandle\n"); | |
1897 | return -EINVAL; | |
f7b422b1 DH |
1898 | } |
1899 | ||
48b605f8 JL |
1900 | static int |
1901 | nfs_compare_remount_data(struct nfs_server *nfss, | |
1902 | struct nfs_parsed_mount_data *data) | |
1903 | { | |
1904 | if (data->flags != nfss->flags || | |
1905 | data->rsize != nfss->rsize || | |
1906 | data->wsize != nfss->wsize || | |
1907 | data->retrans != nfss->client->cl_timeout->to_retries || | |
1908 | data->auth_flavors[0] != nfss->client->cl_auth->au_flavor || | |
1909 | data->acregmin != nfss->acregmin / HZ || | |
1910 | data->acregmax != nfss->acregmax / HZ || | |
1911 | data->acdirmin != nfss->acdirmin / HZ || | |
1912 | data->acdirmax != nfss->acdirmax / HZ || | |
1913 | data->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) || | |
bcd2ea17 | 1914 | data->nfs_server.port != nfss->port || |
48b605f8 | 1915 | data->nfs_server.addrlen != nfss->nfs_client->cl_addrlen || |
a1be9eee SR |
1916 | !rpc_cmp_addr((struct sockaddr *)&data->nfs_server.address, |
1917 | (struct sockaddr *)&nfss->nfs_client->cl_addr)) | |
48b605f8 JL |
1918 | return -EINVAL; |
1919 | ||
1920 | return 0; | |
1921 | } | |
1922 | ||
1923 | static int | |
1924 | nfs_remount(struct super_block *sb, int *flags, char *raw_data) | |
1925 | { | |
1926 | int error; | |
1927 | struct nfs_server *nfss = sb->s_fs_info; | |
1928 | struct nfs_parsed_mount_data *data; | |
1929 | struct nfs_mount_data *options = (struct nfs_mount_data *)raw_data; | |
1930 | struct nfs4_mount_data *options4 = (struct nfs4_mount_data *)raw_data; | |
cd100725 | 1931 | u32 nfsvers = nfss->nfs_client->rpc_ops->version; |
48b605f8 JL |
1932 | |
1933 | /* | |
1934 | * Userspace mount programs that send binary options generally send | |
1935 | * them populated with default values. We have no way to know which | |
1936 | * ones were explicitly specified. Fall back to legacy behavior and | |
1937 | * just return success. | |
1938 | */ | |
31c94469 MZ |
1939 | if ((nfsvers == 4 && (!options4 || options4->version == 1)) || |
1940 | (nfsvers <= 3 && (!options || (options->version >= 1 && | |
1941 | options->version <= 6)))) | |
48b605f8 JL |
1942 | return 0; |
1943 | ||
1944 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
1945 | if (data == NULL) | |
1946 | return -ENOMEM; | |
1947 | ||
1948 | /* fill out struct with values from existing mount */ | |
1949 | data->flags = nfss->flags; | |
1950 | data->rsize = nfss->rsize; | |
1951 | data->wsize = nfss->wsize; | |
1952 | data->retrans = nfss->client->cl_timeout->to_retries; | |
1953 | data->auth_flavors[0] = nfss->client->cl_auth->au_flavor; | |
1954 | data->acregmin = nfss->acregmin / HZ; | |
1955 | data->acregmax = nfss->acregmax / HZ; | |
1956 | data->acdirmin = nfss->acdirmin / HZ; | |
1957 | data->acdirmax = nfss->acdirmax / HZ; | |
1958 | data->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; | |
bcd2ea17 | 1959 | data->nfs_server.port = nfss->port; |
48b605f8 JL |
1960 | data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; |
1961 | memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr, | |
1962 | data->nfs_server.addrlen); | |
1963 | ||
1964 | /* overwrite those values with any that were specified */ | |
1965 | error = nfs_parse_mount_options((char *)options, data); | |
1966 | if (error < 0) | |
1967 | goto out; | |
1968 | ||
1969 | /* compare new mount options with old ones */ | |
1970 | error = nfs_compare_remount_data(nfss, data); | |
1971 | out: | |
1972 | kfree(data); | |
1973 | return error; | |
1974 | } | |
1975 | ||
f7b422b1 | 1976 | /* |
54ceac45 | 1977 | * Initialise the common bits of the superblock |
f7b422b1 | 1978 | */ |
54ceac45 | 1979 | static inline void nfs_initialise_sb(struct super_block *sb) |
f7b422b1 | 1980 | { |
54ceac45 | 1981 | struct nfs_server *server = NFS_SB(sb); |
5006a76c | 1982 | |
54ceac45 | 1983 | sb->s_magic = NFS_SUPER_MAGIC; |
f7b422b1 | 1984 | |
54ceac45 DH |
1985 | /* We probably want something more informative here */ |
1986 | snprintf(sb->s_id, sizeof(sb->s_id), | |
1987 | "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev)); | |
5006a76c | 1988 | |
54ceac45 DH |
1989 | if (sb->s_blocksize == 0) |
1990 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
1991 | &sb->s_blocksize_bits); | |
f7b422b1 | 1992 | |
54ceac45 DH |
1993 | if (server->flags & NFS_MOUNT_NOAC) |
1994 | sb->s_flags |= MS_SYNCHRONOUS; | |
f7b422b1 | 1995 | |
32a88aa1 JA |
1996 | sb->s_bdi = &server->backing_dev_info; |
1997 | ||
54ceac45 | 1998 | nfs_super_set_maxbytes(sb, server->maxfilesize); |
f7b422b1 DH |
1999 | } |
2000 | ||
2001 | /* | |
54ceac45 | 2002 | * Finish setting up an NFS2/3 superblock |
f7b422b1 | 2003 | */ |
2283f8d6 TT |
2004 | static void nfs_fill_super(struct super_block *sb, |
2005 | struct nfs_parsed_mount_data *data) | |
f7b422b1 DH |
2006 | { |
2007 | struct nfs_server *server = NFS_SB(sb); | |
5006a76c | 2008 | |
54ceac45 DH |
2009 | sb->s_blocksize_bits = 0; |
2010 | sb->s_blocksize = 0; | |
2011 | if (data->bsize) | |
2012 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); | |
f7b422b1 | 2013 | |
8a6e5deb | 2014 | if (server->nfs_client->rpc_ops->version == 3) { |
54ceac45 DH |
2015 | /* The VFS shouldn't apply the umask to mode bits. We will do |
2016 | * so ourselves when necessary. | |
2017 | */ | |
2018 | sb->s_flags |= MS_POSIXACL; | |
2019 | sb->s_time_gran = 1; | |
816724e6 | 2020 | } |
54ceac45 DH |
2021 | |
2022 | sb->s_op = &nfs_sops; | |
2023 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
2024 | } |
2025 | ||
2026 | /* | |
54ceac45 | 2027 | * Finish setting up a cloned NFS2/3 superblock |
f7b422b1 | 2028 | */ |
54ceac45 DH |
2029 | static void nfs_clone_super(struct super_block *sb, |
2030 | const struct super_block *old_sb) | |
f7b422b1 | 2031 | { |
54ceac45 DH |
2032 | struct nfs_server *server = NFS_SB(sb); |
2033 | ||
2034 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; | |
2035 | sb->s_blocksize = old_sb->s_blocksize; | |
2036 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 2037 | |
8a6e5deb | 2038 | if (server->nfs_client->rpc_ops->version == 3) { |
54ceac45 DH |
2039 | /* The VFS shouldn't apply the umask to mode bits. We will do |
2040 | * so ourselves when necessary. | |
f7b422b1 DH |
2041 | */ |
2042 | sb->s_flags |= MS_POSIXACL; | |
f7b422b1 | 2043 | sb->s_time_gran = 1; |
f7b422b1 DH |
2044 | } |
2045 | ||
54ceac45 DH |
2046 | sb->s_op = old_sb->s_op; |
2047 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
2048 | } |
2049 | ||
275a5d24 TM |
2050 | static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags) |
2051 | { | |
2052 | const struct nfs_server *a = s->s_fs_info; | |
2053 | const struct rpc_clnt *clnt_a = a->client; | |
2054 | const struct rpc_clnt *clnt_b = b->client; | |
2055 | ||
2056 | if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK)) | |
2057 | goto Ebusy; | |
2058 | if (a->nfs_client != b->nfs_client) | |
2059 | goto Ebusy; | |
2060 | if (a->flags != b->flags) | |
2061 | goto Ebusy; | |
2062 | if (a->wsize != b->wsize) | |
2063 | goto Ebusy; | |
2064 | if (a->rsize != b->rsize) | |
2065 | goto Ebusy; | |
2066 | if (a->acregmin != b->acregmin) | |
2067 | goto Ebusy; | |
2068 | if (a->acregmax != b->acregmax) | |
2069 | goto Ebusy; | |
2070 | if (a->acdirmin != b->acdirmin) | |
2071 | goto Ebusy; | |
2072 | if (a->acdirmax != b->acdirmax) | |
2073 | goto Ebusy; | |
2074 | if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) | |
2075 | goto Ebusy; | |
e89a5a43 | 2076 | return 1; |
275a5d24 | 2077 | Ebusy: |
e89a5a43 TM |
2078 | return 0; |
2079 | } | |
2080 | ||
2081 | struct nfs_sb_mountdata { | |
2082 | struct nfs_server *server; | |
2083 | int mntflags; | |
2084 | }; | |
2085 | ||
2086 | static int nfs_set_super(struct super_block *s, void *data) | |
2087 | { | |
2088 | struct nfs_sb_mountdata *sb_mntdata = data; | |
2089 | struct nfs_server *server = sb_mntdata->server; | |
2090 | int ret; | |
2091 | ||
2092 | s->s_flags = sb_mntdata->mntflags; | |
2093 | s->s_fs_info = server; | |
2094 | ret = set_anon_super(s, server); | |
2095 | if (ret == 0) | |
2096 | server->s_dev = s->s_dev; | |
2097 | return ret; | |
2098 | } | |
2099 | ||
fd00a8ff CL |
2100 | static int nfs_compare_super_address(struct nfs_server *server1, |
2101 | struct nfs_server *server2) | |
2102 | { | |
2103 | struct sockaddr *sap1, *sap2; | |
2104 | ||
2105 | sap1 = (struct sockaddr *)&server1->nfs_client->cl_addr; | |
2106 | sap2 = (struct sockaddr *)&server2->nfs_client->cl_addr; | |
2107 | ||
2108 | if (sap1->sa_family != sap2->sa_family) | |
2109 | return 0; | |
2110 | ||
2111 | switch (sap1->sa_family) { | |
2112 | case AF_INET: { | |
2113 | struct sockaddr_in *sin1 = (struct sockaddr_in *)sap1; | |
2114 | struct sockaddr_in *sin2 = (struct sockaddr_in *)sap2; | |
2115 | if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) | |
2116 | return 0; | |
2117 | if (sin1->sin_port != sin2->sin_port) | |
2118 | return 0; | |
2119 | break; | |
2120 | } | |
2121 | case AF_INET6: { | |
2122 | struct sockaddr_in6 *sin1 = (struct sockaddr_in6 *)sap1; | |
2123 | struct sockaddr_in6 *sin2 = (struct sockaddr_in6 *)sap2; | |
2124 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) | |
2125 | return 0; | |
2126 | if (sin1->sin6_port != sin2->sin6_port) | |
2127 | return 0; | |
2128 | break; | |
2129 | } | |
2130 | default: | |
2131 | return 0; | |
2132 | } | |
2133 | ||
2134 | return 1; | |
2135 | } | |
2136 | ||
e89a5a43 TM |
2137 | static int nfs_compare_super(struct super_block *sb, void *data) |
2138 | { | |
2139 | struct nfs_sb_mountdata *sb_mntdata = data; | |
2140 | struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb); | |
2141 | int mntflags = sb_mntdata->mntflags; | |
2142 | ||
fd00a8ff | 2143 | if (!nfs_compare_super_address(old, server)) |
e89a5a43 TM |
2144 | return 0; |
2145 | /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */ | |
2146 | if (old->flags & NFS_MOUNT_UNSHARED) | |
2147 | return 0; | |
2148 | if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0) | |
2149 | return 0; | |
2150 | return nfs_compare_mount_options(sb, server, mntflags); | |
275a5d24 TM |
2151 | } |
2152 | ||
fa799759 MS |
2153 | static int nfs_bdi_register(struct nfs_server *server) |
2154 | { | |
2155 | return bdi_register_dev(&server->backing_dev_info, server->s_dev); | |
2156 | } | |
2157 | ||
816724e6 TM |
2158 | static int nfs_get_sb(struct file_system_type *fs_type, |
2159 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
f7b422b1 | 2160 | { |
f7b422b1 DH |
2161 | struct nfs_server *server = NULL; |
2162 | struct super_block *s; | |
33852a1f TM |
2163 | struct nfs_parsed_mount_data *data; |
2164 | struct nfs_fh *mntfh; | |
54ceac45 | 2165 | struct dentry *mntroot; |
75180df2 | 2166 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2167 | struct nfs_sb_mountdata sb_mntdata = { |
2168 | .mntflags = flags, | |
2169 | }; | |
33852a1f TM |
2170 | int error = -ENOMEM; |
2171 | ||
c5811dbd | 2172 | data = nfs_alloc_parsed_mount_data(3); |
33852a1f TM |
2173 | mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL); |
2174 | if (data == NULL || mntfh == NULL) | |
2175 | goto out_free_fh; | |
f7b422b1 | 2176 | |
33852a1f | 2177 | security_init_mnt_opts(&data->lsm_opts); |
f9c3a380 | 2178 | |
54ceac45 | 2179 | /* Validate the mount data */ |
33852a1f | 2180 | error = nfs_validate_mount_data(raw_data, data, mntfh, dev_name); |
54ceac45 | 2181 | if (error < 0) |
0655960f | 2182 | goto out; |
f7b422b1 | 2183 | |
764302cc CL |
2184 | #ifdef CONFIG_NFS_V4 |
2185 | if (data->version == 4) { | |
2186 | error = nfs4_try_mount(flags, dev_name, data, mnt); | |
2187 | kfree(data->client_address); | |
2188 | goto out; | |
2189 | } | |
2190 | #endif /* CONFIG_NFS_V4 */ | |
2191 | ||
54ceac45 | 2192 | /* Get a volume representation */ |
33852a1f | 2193 | server = nfs_create_server(data, mntfh); |
54ceac45 DH |
2194 | if (IS_ERR(server)) { |
2195 | error = PTR_ERR(server); | |
0655960f | 2196 | goto out; |
f7b422b1 | 2197 | } |
e89a5a43 | 2198 | sb_mntdata.server = server; |
f7b422b1 | 2199 | |
75180df2 TM |
2200 | if (server->flags & NFS_MOUNT_UNSHARED) |
2201 | compare_super = NULL; | |
2202 | ||
54ceac45 | 2203 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 2204 | s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
2205 | if (IS_ERR(s)) { |
2206 | error = PTR_ERR(s); | |
54ceac45 | 2207 | goto out_err_nosb; |
816724e6 TM |
2208 | } |
2209 | ||
54ceac45 DH |
2210 | if (s->s_fs_info != server) { |
2211 | nfs_free_server(server); | |
2212 | server = NULL; | |
fa799759 MS |
2213 | } else { |
2214 | error = nfs_bdi_register(server); | |
2215 | if (error) | |
2216 | goto error_splat_super; | |
54ceac45 | 2217 | } |
f7b422b1 | 2218 | |
54ceac45 DH |
2219 | if (!s->s_root) { |
2220 | /* initial superblock/root creation */ | |
33852a1f | 2221 | nfs_fill_super(s, data); |
2df54806 DH |
2222 | nfs_fscache_get_super_cookie( |
2223 | s, data ? data->fscache_uniq : NULL, NULL); | |
54ceac45 | 2224 | } |
f7b422b1 | 2225 | |
33852a1f | 2226 | mntroot = nfs_get_root(s, mntfh); |
54ceac45 DH |
2227 | if (IS_ERR(mntroot)) { |
2228 | error = PTR_ERR(mntroot); | |
2229 | goto error_splat_super; | |
f7b422b1 | 2230 | } |
816724e6 | 2231 | |
33852a1f | 2232 | error = security_sb_set_mnt_opts(s, &data->lsm_opts); |
f9c3a380 EP |
2233 | if (error) |
2234 | goto error_splat_root; | |
2235 | ||
54ceac45 DH |
2236 | s->s_flags |= MS_ACTIVE; |
2237 | mnt->mnt_sb = s; | |
2238 | mnt->mnt_root = mntroot; | |
0655960f CL |
2239 | error = 0; |
2240 | ||
2241 | out: | |
33852a1f TM |
2242 | kfree(data->nfs_server.hostname); |
2243 | kfree(data->mount_server.hostname); | |
08734048 | 2244 | kfree(data->fscache_uniq); |
33852a1f TM |
2245 | security_free_mnt_opts(&data->lsm_opts); |
2246 | out_free_fh: | |
2247 | kfree(mntfh); | |
2248 | kfree(data); | |
0655960f | 2249 | return error; |
816724e6 | 2250 | |
54ceac45 DH |
2251 | out_err_nosb: |
2252 | nfs_free_server(server); | |
0655960f | 2253 | goto out; |
54ceac45 | 2254 | |
f9c3a380 EP |
2255 | error_splat_root: |
2256 | dput(mntroot); | |
54ceac45 | 2257 | error_splat_super: |
6f5bbff9 | 2258 | deactivate_locked_super(s); |
0655960f | 2259 | goto out; |
f7b422b1 DH |
2260 | } |
2261 | ||
54ceac45 DH |
2262 | /* |
2263 | * Destroy an NFS2/3 superblock | |
2264 | */ | |
f7b422b1 DH |
2265 | static void nfs_kill_super(struct super_block *s) |
2266 | { | |
2267 | struct nfs_server *server = NFS_SB(s); | |
2268 | ||
2269 | kill_anon_super(s); | |
92f25053 | 2270 | bdi_unregister(&server->backing_dev_info); |
08734048 | 2271 | nfs_fscache_release_super_cookie(s); |
54ceac45 | 2272 | nfs_free_server(server); |
f7b422b1 DH |
2273 | } |
2274 | ||
54ceac45 DH |
2275 | /* |
2276 | * Clone an NFS2/3 server record on xdev traversal (FSID-change) | |
2277 | */ | |
2278 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags, | |
2279 | const char *dev_name, void *raw_data, | |
2280 | struct vfsmount *mnt) | |
f7b422b1 DH |
2281 | { |
2282 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
2283 | struct super_block *s; |
2284 | struct nfs_server *server; | |
2285 | struct dentry *mntroot; | |
75180df2 | 2286 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2287 | struct nfs_sb_mountdata sb_mntdata = { |
2288 | .mntflags = flags, | |
2289 | }; | |
54ceac45 | 2290 | int error; |
f7b422b1 | 2291 | |
54ceac45 | 2292 | dprintk("--> nfs_xdev_get_sb()\n"); |
f7b422b1 | 2293 | |
54ceac45 DH |
2294 | /* create a new volume representation */ |
2295 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
2296 | if (IS_ERR(server)) { | |
2297 | error = PTR_ERR(server); | |
2298 | goto out_err_noserver; | |
2299 | } | |
e89a5a43 | 2300 | sb_mntdata.server = server; |
8fa5c000 | 2301 | |
75180df2 TM |
2302 | if (server->flags & NFS_MOUNT_UNSHARED) |
2303 | compare_super = NULL; | |
2304 | ||
54ceac45 | 2305 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 2306 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2307 | if (IS_ERR(s)) { |
2308 | error = PTR_ERR(s); | |
2309 | goto out_err_nosb; | |
2310 | } | |
5006a76c | 2311 | |
54ceac45 DH |
2312 | if (s->s_fs_info != server) { |
2313 | nfs_free_server(server); | |
2314 | server = NULL; | |
fa799759 MS |
2315 | } else { |
2316 | error = nfs_bdi_register(server); | |
2317 | if (error) | |
2318 | goto error_splat_super; | |
f7b422b1 | 2319 | } |
24c8dbbb | 2320 | |
54ceac45 DH |
2321 | if (!s->s_root) { |
2322 | /* initial superblock/root creation */ | |
54ceac45 | 2323 | nfs_clone_super(s, data->sb); |
2df54806 | 2324 | nfs_fscache_get_super_cookie(s, NULL, data); |
54ceac45 | 2325 | } |
f7b422b1 | 2326 | |
54ceac45 DH |
2327 | mntroot = nfs_get_root(s, data->fh); |
2328 | if (IS_ERR(mntroot)) { | |
2329 | error = PTR_ERR(mntroot); | |
2330 | goto error_splat_super; | |
f7b422b1 | 2331 | } |
e9cc6c23 | 2332 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
4c1fe2f7 NB |
2333 | dput(mntroot); |
2334 | error = -ESTALE; | |
2335 | goto error_splat_super; | |
2336 | } | |
f7b422b1 | 2337 | |
54ceac45 DH |
2338 | s->s_flags |= MS_ACTIVE; |
2339 | mnt->mnt_sb = s; | |
2340 | mnt->mnt_root = mntroot; | |
f7b422b1 | 2341 | |
f9c3a380 EP |
2342 | /* clone any lsm security options from the parent to the new sb */ |
2343 | security_sb_clone_mnt_opts(data->sb, s); | |
2344 | ||
54ceac45 DH |
2345 | dprintk("<-- nfs_xdev_get_sb() = 0\n"); |
2346 | return 0; | |
24c8dbbb | 2347 | |
54ceac45 DH |
2348 | out_err_nosb: |
2349 | nfs_free_server(server); | |
2350 | out_err_noserver: | |
2351 | dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error); | |
2352 | return error; | |
f7b422b1 | 2353 | |
54ceac45 | 2354 | error_splat_super: |
6f5bbff9 | 2355 | deactivate_locked_super(s); |
54ceac45 DH |
2356 | dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error); |
2357 | return error; | |
f7b422b1 DH |
2358 | } |
2359 | ||
54ceac45 DH |
2360 | #ifdef CONFIG_NFS_V4 |
2361 | ||
f7b422b1 | 2362 | /* |
54ceac45 | 2363 | * Finish setting up a cloned NFS4 superblock |
f7b422b1 | 2364 | */ |
54ceac45 DH |
2365 | static void nfs4_clone_super(struct super_block *sb, |
2366 | const struct super_block *old_sb) | |
f7b422b1 | 2367 | { |
54ceac45 DH |
2368 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; |
2369 | sb->s_blocksize = old_sb->s_blocksize; | |
2370 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 2371 | sb->s_time_gran = 1; |
54ceac45 DH |
2372 | sb->s_op = old_sb->s_op; |
2373 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
2374 | } |
2375 | ||
54ceac45 DH |
2376 | /* |
2377 | * Set up an NFS4 superblock | |
2378 | */ | |
2379 | static void nfs4_fill_super(struct super_block *sb) | |
f7b422b1 | 2380 | { |
54ceac45 DH |
2381 | sb->s_time_gran = 1; |
2382 | sb->s_op = &nfs4_sops; | |
2383 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
2384 | } |
2385 | ||
01c3f052 TM |
2386 | static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) |
2387 | { | |
2388 | args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3); | |
2389 | } | |
2390 | ||
7630c852 CL |
2391 | static int nfs4_validate_text_mount_data(void *options, |
2392 | struct nfs_parsed_mount_data *args, | |
2393 | const char *dev_name) | |
2394 | { | |
2395 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; | |
2396 | ||
f5855fec | 2397 | nfs_set_port(sap, &args->nfs_server.port, NFS_PORT); |
7630c852 CL |
2398 | |
2399 | nfs_validate_transport_protocol(args); | |
2400 | ||
2401 | nfs4_validate_mount_flags(args); | |
2402 | ||
2ecda72b TM |
2403 | if (args->version != 4) { |
2404 | dfprintk(MOUNT, | |
2405 | "NFS4: Illegal mount version\n"); | |
2406 | return -EINVAL; | |
2407 | } | |
2408 | ||
7630c852 CL |
2409 | if (args->auth_flavor_len > 1) { |
2410 | dfprintk(MOUNT, | |
2411 | "NFS4: Too many RPC auth flavours specified\n"); | |
2412 | return -EINVAL; | |
2413 | } | |
2414 | ||
2415 | if (args->client_address == NULL) { | |
2416 | dfprintk(MOUNT, | |
2417 | "NFS4: mount program didn't pass callback address\n"); | |
2418 | return -EINVAL; | |
2419 | } | |
2420 | ||
2421 | return nfs_parse_devname(dev_name, | |
2422 | &args->nfs_server.hostname, | |
2423 | NFS4_MAXNAMLEN, | |
2424 | &args->nfs_server.export_path, | |
2425 | NFS4_MAXPATHLEN); | |
2426 | } | |
2427 | ||
f0768ebd CL |
2428 | /* |
2429 | * Validate NFSv4 mount options | |
2430 | */ | |
91ea40b9 TT |
2431 | static int nfs4_validate_mount_data(void *options, |
2432 | struct nfs_parsed_mount_data *args, | |
2433 | const char *dev_name) | |
f0768ebd | 2434 | { |
4cfd74fc | 2435 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; |
91ea40b9 | 2436 | struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; |
f0768ebd CL |
2437 | char *c; |
2438 | ||
2439 | if (data == NULL) | |
2440 | goto out_no_data; | |
2441 | ||
2442 | switch (data->version) { | |
2443 | case 1: | |
4c568017 CL |
2444 | if (data->host_addrlen > sizeof(args->nfs_server.address)) |
2445 | goto out_no_address; | |
2446 | if (data->host_addrlen == 0) | |
f0768ebd | 2447 | goto out_no_address; |
4c568017 | 2448 | args->nfs_server.addrlen = data->host_addrlen; |
4cfd74fc | 2449 | if (copy_from_user(sap, data->host_addr, data->host_addrlen)) |
f0768ebd | 2450 | return -EFAULT; |
4cfd74fc | 2451 | if (!nfs_verify_server_address(sap)) |
f0768ebd CL |
2452 | goto out_no_address; |
2453 | ||
6738b251 CL |
2454 | if (data->auth_flavourlen) { |
2455 | if (data->auth_flavourlen > 1) | |
2456 | goto out_inval_auth; | |
20c71f5e | 2457 | if (copy_from_user(&args->auth_flavors[0], |
91ea40b9 | 2458 | data->auth_flavours, |
20c71f5e | 2459 | sizeof(args->auth_flavors[0]))) |
f0768ebd | 2460 | return -EFAULT; |
f0768ebd CL |
2461 | } |
2462 | ||
2463 | c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); | |
2464 | if (IS_ERR(c)) | |
2465 | return PTR_ERR(c); | |
91ea40b9 | 2466 | args->nfs_server.hostname = c; |
f0768ebd CL |
2467 | |
2468 | c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); | |
2469 | if (IS_ERR(c)) | |
2470 | return PTR_ERR(c); | |
91ea40b9 TT |
2471 | args->nfs_server.export_path = c; |
2472 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); | |
f0768ebd CL |
2473 | |
2474 | c = strndup_user(data->client_addr.data, 16); | |
2475 | if (IS_ERR(c)) | |
2476 | return PTR_ERR(c); | |
91ea40b9 TT |
2477 | args->client_address = c; |
2478 | ||
2479 | /* | |
2480 | * Translate to nfs_parsed_mount_data, which nfs4_fill_super | |
2481 | * can deal with. | |
2482 | */ | |
2483 | ||
2484 | args->flags = data->flags & NFS4_MOUNT_FLAGMASK; | |
2485 | args->rsize = data->rsize; | |
2486 | args->wsize = data->wsize; | |
2487 | args->timeo = data->timeo; | |
2488 | args->retrans = data->retrans; | |
2489 | args->acregmin = data->acregmin; | |
2490 | args->acregmax = data->acregmax; | |
2491 | args->acdirmin = data->acdirmin; | |
2492 | args->acdirmax = data->acdirmax; | |
2493 | args->nfs_server.protocol = data->proto; | |
259875ef | 2494 | nfs_validate_transport_protocol(args); |
f0768ebd CL |
2495 | |
2496 | break; | |
7630c852 | 2497 | default: |
91ea40b9 | 2498 | if (nfs_parse_mount_options((char *)options, args) == 0) |
80071225 CL |
2499 | return -EINVAL; |
2500 | ||
4cfd74fc | 2501 | if (!nfs_verify_server_address(sap)) |
80071225 | 2502 | return -EINVAL; |
dc045898 | 2503 | |
7630c852 | 2504 | return nfs4_validate_text_mount_data(options, args, dev_name); |
f0768ebd CL |
2505 | } |
2506 | ||
2507 | return 0; | |
2508 | ||
2509 | out_no_data: | |
2510 | dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); | |
2511 | return -EINVAL; | |
2512 | ||
2513 | out_inval_auth: | |
2514 | dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", | |
2515 | data->auth_flavourlen); | |
2516 | return -EINVAL; | |
2517 | ||
2518 | out_no_address: | |
2519 | dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); | |
2520 | return -EINVAL; | |
f0768ebd CL |
2521 | } |
2522 | ||
54ceac45 | 2523 | /* |
c02d7adf | 2524 | * Get the superblock for the NFS4 root partition |
54ceac45 | 2525 | */ |
c02d7adf | 2526 | static int nfs4_remote_get_sb(struct file_system_type *fs_type, |
816724e6 | 2527 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) |
f7b422b1 | 2528 | { |
c02d7adf | 2529 | struct nfs_parsed_mount_data *data = raw_data; |
54ceac45 DH |
2530 | struct super_block *s; |
2531 | struct nfs_server *server; | |
33852a1f | 2532 | struct nfs_fh *mntfh; |
54ceac45 | 2533 | struct dentry *mntroot; |
75180df2 | 2534 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2535 | struct nfs_sb_mountdata sb_mntdata = { |
2536 | .mntflags = flags, | |
2537 | }; | |
33852a1f TM |
2538 | int error = -ENOMEM; |
2539 | ||
33852a1f TM |
2540 | mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL); |
2541 | if (data == NULL || mntfh == NULL) | |
2542 | goto out_free_fh; | |
f7b422b1 | 2543 | |
33852a1f | 2544 | security_init_mnt_opts(&data->lsm_opts); |
f9c3a380 | 2545 | |
54ceac45 | 2546 | /* Get a volume representation */ |
33852a1f | 2547 | server = nfs4_create_server(data, mntfh); |
54ceac45 DH |
2548 | if (IS_ERR(server)) { |
2549 | error = PTR_ERR(server); | |
29eb981a | 2550 | goto out; |
f7b422b1 | 2551 | } |
e89a5a43 | 2552 | sb_mntdata.server = server; |
f7b422b1 | 2553 | |
75180df2 TM |
2554 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2555 | compare_super = NULL; | |
2556 | ||
54ceac45 | 2557 | /* Get a superblock - note that we may end up sharing one that already exists */ |
c02d7adf | 2558 | s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
2559 | if (IS_ERR(s)) { |
2560 | error = PTR_ERR(s); | |
f7b422b1 | 2561 | goto out_free; |
816724e6 TM |
2562 | } |
2563 | ||
5dd3177a TM |
2564 | if (s->s_fs_info != server) { |
2565 | nfs_free_server(server); | |
2566 | server = NULL; | |
fa799759 MS |
2567 | } else { |
2568 | error = nfs_bdi_register(server); | |
2569 | if (error) | |
2570 | goto error_splat_super; | |
5dd3177a TM |
2571 | } |
2572 | ||
54ceac45 DH |
2573 | if (!s->s_root) { |
2574 | /* initial superblock/root creation */ | |
54ceac45 | 2575 | nfs4_fill_super(s); |
2df54806 DH |
2576 | nfs_fscache_get_super_cookie( |
2577 | s, data ? data->fscache_uniq : NULL, NULL); | |
54ceac45 | 2578 | } |
f7b422b1 | 2579 | |
33852a1f | 2580 | mntroot = nfs4_get_root(s, mntfh); |
54ceac45 DH |
2581 | if (IS_ERR(mntroot)) { |
2582 | error = PTR_ERR(mntroot); | |
2583 | goto error_splat_super; | |
f7b422b1 | 2584 | } |
54ceac45 | 2585 | |
33852a1f | 2586 | error = security_sb_set_mnt_opts(s, &data->lsm_opts); |
46c8ac74 EP |
2587 | if (error) |
2588 | goto error_splat_root; | |
2589 | ||
f7b422b1 | 2590 | s->s_flags |= MS_ACTIVE; |
54ceac45 DH |
2591 | mnt->mnt_sb = s; |
2592 | mnt->mnt_root = mntroot; | |
29eb981a CL |
2593 | error = 0; |
2594 | ||
2595 | out: | |
33852a1f TM |
2596 | security_free_mnt_opts(&data->lsm_opts); |
2597 | out_free_fh: | |
2598 | kfree(mntfh); | |
29eb981a | 2599 | return error; |
54ceac45 | 2600 | |
f7b422b1 | 2601 | out_free: |
54ceac45 | 2602 | nfs_free_server(server); |
29eb981a | 2603 | goto out; |
54ceac45 | 2604 | |
46c8ac74 EP |
2605 | error_splat_root: |
2606 | dput(mntroot); | |
54ceac45 | 2607 | error_splat_super: |
6f5bbff9 | 2608 | deactivate_locked_super(s); |
29eb981a | 2609 | goto out; |
f7b422b1 DH |
2610 | } |
2611 | ||
c02d7adf TM |
2612 | static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type, |
2613 | int flags, void *data, const char *hostname) | |
2614 | { | |
2615 | struct vfsmount *root_mnt; | |
2616 | char *root_devname; | |
2617 | size_t len; | |
2618 | ||
2619 | len = strlen(hostname) + 3; | |
2620 | root_devname = kmalloc(len, GFP_KERNEL); | |
2621 | if (root_devname == NULL) | |
2622 | return ERR_PTR(-ENOMEM); | |
2623 | snprintf(root_devname, len, "%s:/", hostname); | |
2624 | root_mnt = vfs_kern_mount(fs_type, flags, root_devname, data); | |
2625 | kfree(root_devname); | |
2626 | return root_mnt; | |
2627 | } | |
2628 | ||
b88f8a54 TM |
2629 | static void nfs_fix_devname(const struct path *path, struct vfsmount *mnt) |
2630 | { | |
2631 | char *page = (char *) __get_free_page(GFP_KERNEL); | |
2632 | char *devname, *tmp; | |
2633 | ||
2634 | if (page == NULL) | |
2635 | return; | |
2636 | devname = nfs_path(path->mnt->mnt_devname, | |
2637 | path->mnt->mnt_root, path->dentry, | |
2638 | page, PAGE_SIZE); | |
2639 | if (devname == NULL) | |
2640 | goto out_freepage; | |
2641 | tmp = kstrdup(devname, GFP_KERNEL); | |
2642 | if (tmp == NULL) | |
2643 | goto out_freepage; | |
2644 | kfree(mnt->mnt_devname); | |
2645 | mnt->mnt_devname = tmp; | |
2646 | out_freepage: | |
2647 | free_page((unsigned long)page); | |
2648 | } | |
2649 | ||
c02d7adf TM |
2650 | static int nfs_follow_remote_path(struct vfsmount *root_mnt, |
2651 | const char *export_path, struct vfsmount *mnt_target) | |
2652 | { | |
2653 | struct mnt_namespace *ns_private; | |
2654 | struct nameidata nd; | |
2655 | struct super_block *s; | |
2656 | int ret; | |
2657 | ||
2658 | ns_private = create_mnt_ns(root_mnt); | |
2659 | ret = PTR_ERR(ns_private); | |
2660 | if (IS_ERR(ns_private)) | |
2661 | goto out_mntput; | |
2662 | ||
2663 | ret = vfs_path_lookup(root_mnt->mnt_root, root_mnt, | |
2664 | export_path, LOOKUP_FOLLOW, &nd); | |
2665 | ||
2666 | put_mnt_ns(ns_private); | |
2667 | ||
2668 | if (ret != 0) | |
2669 | goto out_err; | |
2670 | ||
2671 | s = nd.path.mnt->mnt_sb; | |
2672 | atomic_inc(&s->s_active); | |
2673 | mnt_target->mnt_sb = s; | |
2674 | mnt_target->mnt_root = dget(nd.path.dentry); | |
2675 | ||
b88f8a54 TM |
2676 | /* Correct the device pathname */ |
2677 | nfs_fix_devname(&nd.path, mnt_target); | |
2678 | ||
c02d7adf TM |
2679 | path_put(&nd.path); |
2680 | down_write(&s->s_umount); | |
2681 | return 0; | |
2682 | out_mntput: | |
2683 | mntput(root_mnt); | |
2684 | out_err: | |
2685 | return ret; | |
2686 | } | |
2687 | ||
a6fe23be CL |
2688 | static int nfs4_try_mount(int flags, const char *dev_name, |
2689 | struct nfs_parsed_mount_data *data, | |
2690 | struct vfsmount *mnt) | |
2691 | { | |
2692 | char *export_path; | |
2693 | struct vfsmount *root_mnt; | |
2694 | int error; | |
2695 | ||
2696 | dfprintk(MOUNT, "--> nfs4_try_mount()\n"); | |
2697 | ||
2698 | export_path = data->nfs_server.export_path; | |
2699 | data->nfs_server.export_path = "/"; | |
2700 | root_mnt = nfs_do_root_mount(&nfs4_remote_fs_type, flags, data, | |
2701 | data->nfs_server.hostname); | |
2702 | data->nfs_server.export_path = export_path; | |
2703 | ||
2704 | error = PTR_ERR(root_mnt); | |
2705 | if (IS_ERR(root_mnt)) | |
2706 | goto out; | |
2707 | ||
2708 | error = nfs_follow_remote_path(root_mnt, export_path, mnt); | |
2709 | ||
2710 | out: | |
2711 | dfprintk(MOUNT, "<-- nfs4_try_mount() = %d%s\n", error, | |
2712 | error != 0 ? " [error]" : ""); | |
2713 | return error; | |
2714 | } | |
2715 | ||
c02d7adf TM |
2716 | /* |
2717 | * Get the superblock for an NFS4 mountpoint | |
2718 | */ | |
2719 | static int nfs4_get_sb(struct file_system_type *fs_type, | |
2720 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
2721 | { | |
2722 | struct nfs_parsed_mount_data *data; | |
c02d7adf TM |
2723 | int error = -ENOMEM; |
2724 | ||
c5811dbd | 2725 | data = nfs_alloc_parsed_mount_data(4); |
c02d7adf TM |
2726 | if (data == NULL) |
2727 | goto out_free_data; | |
2728 | ||
2729 | /* Validate the mount data */ | |
2730 | error = nfs4_validate_mount_data(raw_data, data, dev_name); | |
2731 | if (error < 0) | |
2732 | goto out; | |
2733 | ||
a6fe23be | 2734 | error = nfs4_try_mount(flags, dev_name, data, mnt); |
c02d7adf TM |
2735 | |
2736 | out: | |
2737 | kfree(data->client_address); | |
2738 | kfree(data->nfs_server.export_path); | |
2739 | kfree(data->nfs_server.hostname); | |
2740 | kfree(data->fscache_uniq); | |
2741 | out_free_data: | |
2742 | kfree(data); | |
2743 | dprintk("<-- nfs4_get_sb() = %d%s\n", error, | |
2744 | error != 0 ? " [error]" : ""); | |
2745 | return error; | |
2746 | } | |
2747 | ||
f7b422b1 DH |
2748 | static void nfs4_kill_super(struct super_block *sb) |
2749 | { | |
2750 | struct nfs_server *server = NFS_SB(sb); | |
2751 | ||
0f3e66c6 | 2752 | dprintk("--> %s\n", __func__); |
515d8611 | 2753 | nfs_super_return_all_delegations(sb); |
f7b422b1 | 2754 | kill_anon_super(sb); |
08734048 | 2755 | nfs_fscache_release_super_cookie(sb); |
54ceac45 | 2756 | nfs_free_server(server); |
0f3e66c6 | 2757 | dprintk("<-- %s\n", __func__); |
f7b422b1 DH |
2758 | } |
2759 | ||
2760 | /* | |
54ceac45 | 2761 | * Clone an NFS4 server record on xdev traversal (FSID-change) |
f7b422b1 | 2762 | */ |
54ceac45 DH |
2763 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags, |
2764 | const char *dev_name, void *raw_data, | |
2765 | struct vfsmount *mnt) | |
f7b422b1 | 2766 | { |
54ceac45 DH |
2767 | struct nfs_clone_mount *data = raw_data; |
2768 | struct super_block *s; | |
2769 | struct nfs_server *server; | |
2770 | struct dentry *mntroot; | |
75180df2 | 2771 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2772 | struct nfs_sb_mountdata sb_mntdata = { |
2773 | .mntflags = flags, | |
2774 | }; | |
54ceac45 | 2775 | int error; |
f7b422b1 | 2776 | |
54ceac45 | 2777 | dprintk("--> nfs4_xdev_get_sb()\n"); |
f7b422b1 | 2778 | |
54ceac45 DH |
2779 | /* create a new volume representation */ |
2780 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
2781 | if (IS_ERR(server)) { | |
2782 | error = PTR_ERR(server); | |
2783 | goto out_err_noserver; | |
f7b422b1 | 2784 | } |
e89a5a43 | 2785 | sb_mntdata.server = server; |
f7b422b1 | 2786 | |
75180df2 TM |
2787 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2788 | compare_super = NULL; | |
2789 | ||
54ceac45 | 2790 | /* Get a superblock - note that we may end up sharing one that already exists */ |
ec9a05c9 | 2791 | s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2792 | if (IS_ERR(s)) { |
2793 | error = PTR_ERR(s); | |
2794 | goto out_err_nosb; | |
f7b422b1 | 2795 | } |
f7b422b1 | 2796 | |
54ceac45 DH |
2797 | if (s->s_fs_info != server) { |
2798 | nfs_free_server(server); | |
2799 | server = NULL; | |
fa799759 MS |
2800 | } else { |
2801 | error = nfs_bdi_register(server); | |
2802 | if (error) | |
2803 | goto error_splat_super; | |
54ceac45 | 2804 | } |
f7b422b1 | 2805 | |
54ceac45 DH |
2806 | if (!s->s_root) { |
2807 | /* initial superblock/root creation */ | |
54ceac45 | 2808 | nfs4_clone_super(s, data->sb); |
2df54806 | 2809 | nfs_fscache_get_super_cookie(s, NULL, data); |
54ceac45 | 2810 | } |
f7b422b1 | 2811 | |
54ceac45 DH |
2812 | mntroot = nfs4_get_root(s, data->fh); |
2813 | if (IS_ERR(mntroot)) { | |
2814 | error = PTR_ERR(mntroot); | |
2815 | goto error_splat_super; | |
2816 | } | |
e9cc6c23 TM |
2817 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
2818 | dput(mntroot); | |
2819 | error = -ESTALE; | |
2820 | goto error_splat_super; | |
2821 | } | |
f7b422b1 | 2822 | |
54ceac45 DH |
2823 | s->s_flags |= MS_ACTIVE; |
2824 | mnt->mnt_sb = s; | |
2825 | mnt->mnt_root = mntroot; | |
2826 | ||
46c8ac74 EP |
2827 | security_sb_clone_mnt_opts(data->sb, s); |
2828 | ||
54ceac45 DH |
2829 | dprintk("<-- nfs4_xdev_get_sb() = 0\n"); |
2830 | return 0; | |
2831 | ||
2832 | out_err_nosb: | |
2833 | nfs_free_server(server); | |
2834 | out_err_noserver: | |
2835 | dprintk("<-- nfs4_xdev_get_sb() = %d [error]\n", error); | |
2836 | return error; | |
2837 | ||
2838 | error_splat_super: | |
6f5bbff9 | 2839 | deactivate_locked_super(s); |
54ceac45 DH |
2840 | dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error); |
2841 | return error; | |
f7b422b1 DH |
2842 | } |
2843 | ||
c02d7adf TM |
2844 | static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type, |
2845 | int flags, const char *dev_name, void *raw_data, | |
2846 | struct vfsmount *mnt) | |
f7b422b1 DH |
2847 | { |
2848 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
2849 | struct super_block *s; |
2850 | struct nfs_server *server; | |
2851 | struct dentry *mntroot; | |
2852 | struct nfs_fh mntfh; | |
75180df2 | 2853 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2854 | struct nfs_sb_mountdata sb_mntdata = { |
2855 | .mntflags = flags, | |
2856 | }; | |
54ceac45 DH |
2857 | int error; |
2858 | ||
2859 | dprintk("--> nfs4_referral_get_sb()\n"); | |
2860 | ||
2861 | /* create a new volume representation */ | |
2862 | server = nfs4_create_referral_server(data, &mntfh); | |
2863 | if (IS_ERR(server)) { | |
2864 | error = PTR_ERR(server); | |
2865 | goto out_err_noserver; | |
2866 | } | |
e89a5a43 | 2867 | sb_mntdata.server = server; |
54ceac45 | 2868 | |
75180df2 TM |
2869 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2870 | compare_super = NULL; | |
2871 | ||
54ceac45 | 2872 | /* Get a superblock - note that we may end up sharing one that already exists */ |
ec9a05c9 | 2873 | s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2874 | if (IS_ERR(s)) { |
2875 | error = PTR_ERR(s); | |
2876 | goto out_err_nosb; | |
2877 | } | |
2878 | ||
2879 | if (s->s_fs_info != server) { | |
2880 | nfs_free_server(server); | |
2881 | server = NULL; | |
fa799759 MS |
2882 | } else { |
2883 | error = nfs_bdi_register(server); | |
2884 | if (error) | |
2885 | goto error_splat_super; | |
54ceac45 DH |
2886 | } |
2887 | ||
2888 | if (!s->s_root) { | |
2889 | /* initial superblock/root creation */ | |
54ceac45 | 2890 | nfs4_fill_super(s); |
2df54806 | 2891 | nfs_fscache_get_super_cookie(s, NULL, data); |
54ceac45 DH |
2892 | } |
2893 | ||
f2d0d85e | 2894 | mntroot = nfs4_get_root(s, &mntfh); |
54ceac45 DH |
2895 | if (IS_ERR(mntroot)) { |
2896 | error = PTR_ERR(mntroot); | |
2897 | goto error_splat_super; | |
2898 | } | |
e9cc6c23 TM |
2899 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
2900 | dput(mntroot); | |
2901 | error = -ESTALE; | |
2902 | goto error_splat_super; | |
2903 | } | |
54ceac45 DH |
2904 | |
2905 | s->s_flags |= MS_ACTIVE; | |
2906 | mnt->mnt_sb = s; | |
2907 | mnt->mnt_root = mntroot; | |
2908 | ||
46c8ac74 EP |
2909 | security_sb_clone_mnt_opts(data->sb, s); |
2910 | ||
54ceac45 DH |
2911 | dprintk("<-- nfs4_referral_get_sb() = 0\n"); |
2912 | return 0; | |
2913 | ||
2914 | out_err_nosb: | |
2915 | nfs_free_server(server); | |
2916 | out_err_noserver: | |
2917 | dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error); | |
2918 | return error; | |
2919 | ||
2920 | error_splat_super: | |
6f5bbff9 | 2921 | deactivate_locked_super(s); |
54ceac45 DH |
2922 | dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error); |
2923 | return error; | |
f7b422b1 DH |
2924 | } |
2925 | ||
c02d7adf TM |
2926 | /* |
2927 | * Create an NFS4 server record on referral traversal | |
2928 | */ | |
2929 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, | |
2930 | int flags, const char *dev_name, void *raw_data, | |
2931 | struct vfsmount *mnt) | |
2932 | { | |
2933 | struct nfs_clone_mount *data = raw_data; | |
2934 | char *export_path; | |
2935 | struct vfsmount *root_mnt; | |
2936 | int error; | |
2937 | ||
2938 | dprintk("--> nfs4_referral_get_sb()\n"); | |
2939 | ||
2940 | export_path = data->mnt_path; | |
2941 | data->mnt_path = "/"; | |
2942 | ||
2943 | root_mnt = nfs_do_root_mount(&nfs4_remote_referral_fs_type, | |
2944 | flags, data, data->hostname); | |
2945 | data->mnt_path = export_path; | |
2946 | ||
2947 | error = PTR_ERR(root_mnt); | |
2948 | if (IS_ERR(root_mnt)) | |
2949 | goto out; | |
2950 | ||
2951 | error = nfs_follow_remote_path(root_mnt, export_path, mnt); | |
2952 | out: | |
2953 | dprintk("<-- nfs4_referral_get_sb() = %d%s\n", error, | |
2954 | error != 0 ? " [error]" : ""); | |
2955 | return error; | |
2956 | } | |
2957 | ||
54ceac45 | 2958 | #endif /* CONFIG_NFS_V4 */ |