Commit | Line | Data |
---|---|---|
f7b422b1 DH |
1 | /* |
2 | * linux/fs/nfs/super.c | |
3 | * | |
4 | * Copyright (C) 1992 Rick Sladkey | |
5 | * | |
6 | * nfs superblock handling functions | |
7 | * | |
526719ba | 8 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
f7b422b1 DH |
9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
10 | * | |
11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
12 | * J.S.Peatfield@damtp.cam.ac.uk | |
13 | * | |
14 | * Split from inode.c by David Howells <dhowells@redhat.com> | |
15 | * | |
54ceac45 DH |
16 | * - superblocks are indexed on server only - all inodes, dentries, etc. associated with a |
17 | * particular server are held in the same superblock | |
18 | * - NFS superblocks can have several effective roots to the dentry tree | |
19 | * - directory type roots are spliced into the tree when a path from one root reaches the root | |
20 | * of another (see nfs_lookup()) | |
f7b422b1 DH |
21 | */ |
22 | ||
f7b422b1 DH |
23 | #include <linux/module.h> |
24 | #include <linux/init.h> | |
25 | ||
26 | #include <linux/time.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/string.h> | |
30 | #include <linux/stat.h> | |
31 | #include <linux/errno.h> | |
32 | #include <linux/unistd.h> | |
33 | #include <linux/sunrpc/clnt.h> | |
34 | #include <linux/sunrpc/stats.h> | |
35 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 36 | #include <linux/sunrpc/xprtsock.h> |
2cf7ff7a | 37 | #include <linux/sunrpc/xprtrdma.h> |
f7b422b1 DH |
38 | #include <linux/nfs_fs.h> |
39 | #include <linux/nfs_mount.h> | |
40 | #include <linux/nfs4_mount.h> | |
41 | #include <linux/lockd/bind.h> | |
42 | #include <linux/smp_lock.h> | |
43 | #include <linux/seq_file.h> | |
44 | #include <linux/mount.h> | |
c02d7adf TM |
45 | #include <linux/mnt_namespace.h> |
46 | #include <linux/namei.h> | |
f7b422b1 DH |
47 | #include <linux/nfs_idmap.h> |
48 | #include <linux/vfs.h> | |
49 | #include <linux/inet.h> | |
fd00a8ff | 50 | #include <linux/in6.h> |
5a0e3ad6 | 51 | #include <linux/slab.h> |
fd00a8ff | 52 | #include <net/ipv6.h> |
d8e7748a | 53 | #include <linux/netdevice.h> |
f7b422b1 | 54 | #include <linux/nfs_xdr.h> |
b5d5dfbd | 55 | #include <linux/magic.h> |
bf0fd768 | 56 | #include <linux/parser.h> |
f7b422b1 DH |
57 | |
58 | #include <asm/system.h> | |
59 | #include <asm/uaccess.h> | |
60 | ||
61 | #include "nfs4_fs.h" | |
62 | #include "callback.h" | |
63 | #include "delegation.h" | |
64 | #include "iostat.h" | |
65 | #include "internal.h" | |
08734048 | 66 | #include "fscache.h" |
f7b422b1 DH |
67 | |
68 | #define NFSDBG_FACILITY NFSDBG_VFS | |
69 | ||
bf0fd768 CL |
70 | enum { |
71 | /* Mount options that take no arguments */ | |
72 | Opt_soft, Opt_hard, | |
bf0fd768 CL |
73 | Opt_posix, Opt_noposix, |
74 | Opt_cto, Opt_nocto, | |
75 | Opt_ac, Opt_noac, | |
76 | Opt_lock, Opt_nolock, | |
764302cc | 77 | Opt_v2, Opt_v3, Opt_v4, |
2cf7ff7a | 78 | Opt_udp, Opt_tcp, Opt_rdma, |
bf0fd768 CL |
79 | Opt_acl, Opt_noacl, |
80 | Opt_rdirplus, Opt_nordirplus, | |
75180df2 | 81 | Opt_sharecache, Opt_nosharecache, |
d740351b | 82 | Opt_resvport, Opt_noresvport, |
b797cac7 | 83 | Opt_fscache, Opt_nofscache, |
bf0fd768 CL |
84 | |
85 | /* Mount options that take integer arguments */ | |
86 | Opt_port, | |
87 | Opt_rsize, Opt_wsize, Opt_bsize, | |
88 | Opt_timeo, Opt_retrans, | |
89 | Opt_acregmin, Opt_acregmax, | |
90 | Opt_acdirmin, Opt_acdirmax, | |
91 | Opt_actimeo, | |
92 | Opt_namelen, | |
93 | Opt_mountport, | |
e887cbcf | 94 | Opt_mountvers, |
ad879cef | 95 | Opt_nfsvers, |
3fd5be9e | 96 | Opt_minorversion, |
bf0fd768 CL |
97 | |
98 | /* Mount options that take string arguments */ | |
33832034 | 99 | Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost, |
0ac83779 | 100 | Opt_addr, Opt_mountaddr, Opt_clientaddr, |
7973c1f1 | 101 | Opt_lookupcache, |
b797cac7 | 102 | Opt_fscache_uniq, |
bf0fd768 | 103 | |
f45663ce CL |
104 | /* Special mount options */ |
105 | Opt_userspace, Opt_deprecated, Opt_sloppy, | |
bf0fd768 CL |
106 | |
107 | Opt_err | |
108 | }; | |
109 | ||
a447c093 | 110 | static const match_table_t nfs_mount_option_tokens = { |
bf0fd768 CL |
111 | { Opt_userspace, "bg" }, |
112 | { Opt_userspace, "fg" }, | |
ecbb3845 CL |
113 | { Opt_userspace, "retry=%s" }, |
114 | ||
f45663ce CL |
115 | { Opt_sloppy, "sloppy" }, |
116 | ||
bf0fd768 CL |
117 | { Opt_soft, "soft" }, |
118 | { Opt_hard, "hard" }, | |
d33e4dfe CL |
119 | { Opt_deprecated, "intr" }, |
120 | { Opt_deprecated, "nointr" }, | |
bf0fd768 CL |
121 | { Opt_posix, "posix" }, |
122 | { Opt_noposix, "noposix" }, | |
123 | { Opt_cto, "cto" }, | |
124 | { Opt_nocto, "nocto" }, | |
125 | { Opt_ac, "ac" }, | |
126 | { Opt_noac, "noac" }, | |
127 | { Opt_lock, "lock" }, | |
128 | { Opt_nolock, "nolock" }, | |
129 | { Opt_v2, "v2" }, | |
130 | { Opt_v3, "v3" }, | |
764302cc | 131 | { Opt_v4, "v4" }, |
bf0fd768 CL |
132 | { Opt_udp, "udp" }, |
133 | { Opt_tcp, "tcp" }, | |
2cf7ff7a | 134 | { Opt_rdma, "rdma" }, |
bf0fd768 CL |
135 | { Opt_acl, "acl" }, |
136 | { Opt_noacl, "noacl" }, | |
137 | { Opt_rdirplus, "rdirplus" }, | |
138 | { Opt_nordirplus, "nordirplus" }, | |
75180df2 TM |
139 | { Opt_sharecache, "sharecache" }, |
140 | { Opt_nosharecache, "nosharecache" }, | |
d740351b CL |
141 | { Opt_resvport, "resvport" }, |
142 | { Opt_noresvport, "noresvport" }, | |
b797cac7 | 143 | { Opt_fscache, "fsc" }, |
b797cac7 | 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 | 172 | { Opt_lookupcache, "lookupcache=%s" }, |
a6d5ff64 | 173 | { Opt_fscache_uniq, "fsc=%s" }, |
7973c1f1 | 174 | |
bf0fd768 CL |
175 | { Opt_err, NULL } |
176 | }; | |
177 | ||
178 | enum { | |
ee671b01 | 179 | Opt_xprt_udp, Opt_xprt_udp6, Opt_xprt_tcp, Opt_xprt_tcp6, Opt_xprt_rdma, |
bf0fd768 CL |
180 | |
181 | Opt_xprt_err | |
182 | }; | |
183 | ||
a447c093 | 184 | static const match_table_t nfs_xprt_protocol_tokens = { |
bf0fd768 | 185 | { Opt_xprt_udp, "udp" }, |
ee671b01 | 186 | { Opt_xprt_udp6, "udp6" }, |
bf0fd768 | 187 | { Opt_xprt_tcp, "tcp" }, |
ee671b01 | 188 | { Opt_xprt_tcp6, "tcp6" }, |
2cf7ff7a | 189 | { Opt_xprt_rdma, "rdma" }, |
bf0fd768 CL |
190 | |
191 | { Opt_xprt_err, NULL } | |
192 | }; | |
193 | ||
194 | enum { | |
195 | Opt_sec_none, Opt_sec_sys, | |
196 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
197 | Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, | |
198 | Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, | |
199 | ||
200 | Opt_sec_err | |
201 | }; | |
202 | ||
a447c093 | 203 | static const match_table_t nfs_secflavor_tokens = { |
bf0fd768 CL |
204 | { Opt_sec_none, "none" }, |
205 | { Opt_sec_none, "null" }, | |
206 | { Opt_sec_sys, "sys" }, | |
207 | ||
208 | { Opt_sec_krb5, "krb5" }, | |
209 | { Opt_sec_krb5i, "krb5i" }, | |
210 | { Opt_sec_krb5p, "krb5p" }, | |
211 | ||
212 | { Opt_sec_lkey, "lkey" }, | |
213 | { Opt_sec_lkeyi, "lkeyi" }, | |
214 | { Opt_sec_lkeyp, "lkeyp" }, | |
215 | ||
8d042218 OK |
216 | { Opt_sec_spkm, "spkm3" }, |
217 | { Opt_sec_spkmi, "spkm3i" }, | |
218 | { Opt_sec_spkmp, "spkm3p" }, | |
219 | ||
bf0fd768 CL |
220 | { Opt_sec_err, NULL } |
221 | }; | |
222 | ||
7973c1f1 TM |
223 | enum { |
224 | Opt_lookupcache_all, Opt_lookupcache_positive, | |
225 | Opt_lookupcache_none, | |
226 | ||
227 | Opt_lookupcache_err | |
228 | }; | |
229 | ||
230 | static match_table_t nfs_lookupcache_tokens = { | |
231 | { Opt_lookupcache_all, "all" }, | |
232 | { Opt_lookupcache_positive, "pos" }, | |
233 | { Opt_lookupcache_positive, "positive" }, | |
234 | { Opt_lookupcache_none, "none" }, | |
235 | ||
236 | { Opt_lookupcache_err, NULL } | |
237 | }; | |
238 | ||
bf0fd768 | 239 | |
42faad99 | 240 | static void nfs_umount_begin(struct super_block *); |
816724e6 | 241 | static int nfs_statfs(struct dentry *, struct kstatfs *); |
f7b422b1 DH |
242 | static int nfs_show_options(struct seq_file *, struct vfsmount *); |
243 | static int nfs_show_stats(struct seq_file *, struct vfsmount *); | |
816724e6 | 244 | static int nfs_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *); |
54ceac45 | 245 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, |
816724e6 | 246 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); |
387c149b | 247 | static void nfs_put_super(struct super_block *); |
f7b422b1 | 248 | static void nfs_kill_super(struct super_block *); |
48b605f8 | 249 | static int nfs_remount(struct super_block *sb, int *flags, char *raw_data); |
f7b422b1 DH |
250 | |
251 | static struct file_system_type nfs_fs_type = { | |
252 | .owner = THIS_MODULE, | |
253 | .name = "nfs", | |
254 | .get_sb = nfs_get_sb, | |
255 | .kill_sb = nfs_kill_super, | |
349457cc | 256 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
257 | }; |
258 | ||
54ceac45 | 259 | struct file_system_type nfs_xdev_fs_type = { |
f7b422b1 DH |
260 | .owner = THIS_MODULE, |
261 | .name = "nfs", | |
54ceac45 | 262 | .get_sb = nfs_xdev_get_sb, |
f7b422b1 | 263 | .kill_sb = nfs_kill_super, |
349457cc | 264 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
265 | }; |
266 | ||
ee9b6d61 | 267 | static const struct super_operations nfs_sops = { |
f7b422b1 DH |
268 | .alloc_inode = nfs_alloc_inode, |
269 | .destroy_inode = nfs_destroy_inode, | |
270 | .write_inode = nfs_write_inode, | |
387c149b | 271 | .put_super = nfs_put_super, |
f7b422b1 DH |
272 | .statfs = nfs_statfs, |
273 | .clear_inode = nfs_clear_inode, | |
274 | .umount_begin = nfs_umount_begin, | |
275 | .show_options = nfs_show_options, | |
276 | .show_stats = nfs_show_stats, | |
48b605f8 | 277 | .remount_fs = nfs_remount, |
f7b422b1 DH |
278 | }; |
279 | ||
280 | #ifdef CONFIG_NFS_V4 | |
7630c852 CL |
281 | static int nfs4_validate_text_mount_data(void *options, |
282 | struct nfs_parsed_mount_data *args, const char *dev_name); | |
a6fe23be CL |
283 | static int nfs4_try_mount(int flags, const char *dev_name, |
284 | struct nfs_parsed_mount_data *data, struct vfsmount *mnt); | |
816724e6 TM |
285 | static int nfs4_get_sb(struct file_system_type *fs_type, |
286 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
c02d7adf TM |
287 | static int nfs4_remote_get_sb(struct file_system_type *fs_type, |
288 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
54ceac45 DH |
289 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, |
290 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
291 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, | |
292 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
c02d7adf TM |
293 | static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type, |
294 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
f7b422b1 DH |
295 | static void nfs4_kill_super(struct super_block *sb); |
296 | ||
297 | static struct file_system_type nfs4_fs_type = { | |
298 | .owner = THIS_MODULE, | |
299 | .name = "nfs4", | |
300 | .get_sb = nfs4_get_sb, | |
301 | .kill_sb = nfs4_kill_super, | |
349457cc | 302 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
303 | }; |
304 | ||
c02d7adf TM |
305 | static struct file_system_type nfs4_remote_fs_type = { |
306 | .owner = THIS_MODULE, | |
307 | .name = "nfs4", | |
308 | .get_sb = nfs4_remote_get_sb, | |
309 | .kill_sb = nfs4_kill_super, | |
310 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, | |
311 | }; | |
312 | ||
54ceac45 | 313 | struct file_system_type nfs4_xdev_fs_type = { |
f7b422b1 DH |
314 | .owner = THIS_MODULE, |
315 | .name = "nfs4", | |
54ceac45 | 316 | .get_sb = nfs4_xdev_get_sb, |
f7b422b1 | 317 | .kill_sb = nfs4_kill_super, |
349457cc | 318 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
319 | }; |
320 | ||
c02d7adf TM |
321 | static struct file_system_type nfs4_remote_referral_fs_type = { |
322 | .owner = THIS_MODULE, | |
323 | .name = "nfs4", | |
324 | .get_sb = nfs4_remote_referral_get_sb, | |
325 | .kill_sb = nfs4_kill_super, | |
326 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, | |
327 | }; | |
328 | ||
54ceac45 | 329 | struct file_system_type nfs4_referral_fs_type = { |
f7b422b1 DH |
330 | .owner = THIS_MODULE, |
331 | .name = "nfs4", | |
54ceac45 | 332 | .get_sb = nfs4_referral_get_sb, |
f7b422b1 | 333 | .kill_sb = nfs4_kill_super, |
349457cc | 334 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
335 | }; |
336 | ||
ee9b6d61 | 337 | static const struct super_operations nfs4_sops = { |
f7b422b1 DH |
338 | .alloc_inode = nfs_alloc_inode, |
339 | .destroy_inode = nfs_destroy_inode, | |
340 | .write_inode = nfs_write_inode, | |
387c149b | 341 | .put_super = nfs_put_super, |
f7b422b1 DH |
342 | .statfs = nfs_statfs, |
343 | .clear_inode = nfs4_clear_inode, | |
344 | .umount_begin = nfs_umount_begin, | |
345 | .show_options = nfs_show_options, | |
346 | .show_stats = nfs_show_stats, | |
48b605f8 | 347 | .remount_fs = nfs_remount, |
f7b422b1 DH |
348 | }; |
349 | #endif | |
350 | ||
8e1f936b RR |
351 | static struct shrinker acl_shrinker = { |
352 | .shrink = nfs_access_cache_shrinker, | |
353 | .seeks = DEFAULT_SEEKS, | |
354 | }; | |
979df72e | 355 | |
f7b422b1 DH |
356 | /* |
357 | * Register the NFS filesystems | |
358 | */ | |
359 | int __init register_nfs_fs(void) | |
360 | { | |
361 | int ret; | |
362 | ||
363 | ret = register_filesystem(&nfs_fs_type); | |
364 | if (ret < 0) | |
365 | goto error_0; | |
366 | ||
f7b422b1 DH |
367 | ret = nfs_register_sysctl(); |
368 | if (ret < 0) | |
369 | goto error_1; | |
89a09141 | 370 | #ifdef CONFIG_NFS_V4 |
f7b422b1 DH |
371 | ret = register_filesystem(&nfs4_fs_type); |
372 | if (ret < 0) | |
373 | goto error_2; | |
374 | #endif | |
8e1f936b | 375 | register_shrinker(&acl_shrinker); |
f7b422b1 DH |
376 | return 0; |
377 | ||
378 | #ifdef CONFIG_NFS_V4 | |
379 | error_2: | |
380 | nfs_unregister_sysctl(); | |
89a09141 | 381 | #endif |
f7b422b1 DH |
382 | error_1: |
383 | unregister_filesystem(&nfs_fs_type); | |
f7b422b1 DH |
384 | error_0: |
385 | return ret; | |
386 | } | |
387 | ||
388 | /* | |
389 | * Unregister the NFS filesystems | |
390 | */ | |
391 | void __exit unregister_nfs_fs(void) | |
392 | { | |
8e1f936b | 393 | unregister_shrinker(&acl_shrinker); |
f7b422b1 DH |
394 | #ifdef CONFIG_NFS_V4 |
395 | unregister_filesystem(&nfs4_fs_type); | |
f7b422b1 | 396 | #endif |
49af7ee1 | 397 | nfs_unregister_sysctl(); |
f7b422b1 DH |
398 | unregister_filesystem(&nfs_fs_type); |
399 | } | |
400 | ||
1daef0a8 | 401 | void nfs_sb_active(struct super_block *sb) |
ef818a28 | 402 | { |
1daef0a8 | 403 | struct nfs_server *server = NFS_SB(sb); |
ef818a28 | 404 | |
1daef0a8 TM |
405 | if (atomic_inc_return(&server->active) == 1) |
406 | atomic_inc(&sb->s_active); | |
ef818a28 SD |
407 | } |
408 | ||
1daef0a8 | 409 | void nfs_sb_deactive(struct super_block *sb) |
ef818a28 SD |
410 | { |
411 | struct nfs_server *server = NFS_SB(sb); | |
1daef0a8 TM |
412 | |
413 | if (atomic_dec_and_test(&server->active)) | |
414 | deactivate_super(sb); | |
ef818a28 SD |
415 | } |
416 | ||
f7b422b1 DH |
417 | /* |
418 | * Deliver file system statistics to userspace | |
419 | */ | |
816724e6 | 420 | static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
f7b422b1 | 421 | { |
0c7d90cf | 422 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
f7b422b1 DH |
423 | unsigned char blockbits; |
424 | unsigned long blockres; | |
0c7d90cf | 425 | struct nfs_fh *fh = NFS_FH(dentry->d_inode); |
ca7e9a0d TM |
426 | struct nfs_fsstat res; |
427 | int error = -ENOMEM; | |
428 | ||
429 | res.fattr = nfs_alloc_fattr(); | |
430 | if (res.fattr == NULL) | |
431 | goto out_err; | |
f7b422b1 | 432 | |
8fa5c000 | 433 | error = server->nfs_client->rpc_ops->statfs(server, fh, &res); |
ca7e9a0d TM |
434 | |
435 | nfs_free_fattr(res.fattr); | |
f7b422b1 DH |
436 | if (error < 0) |
437 | goto out_err; | |
ca7e9a0d | 438 | |
1a0ba9ae | 439 | buf->f_type = NFS_SUPER_MAGIC; |
f7b422b1 DH |
440 | |
441 | /* | |
442 | * Current versions of glibc do not correctly handle the | |
443 | * case where f_frsize != f_bsize. Eventually we want to | |
444 | * report the value of wtmult in this field. | |
445 | */ | |
0c7d90cf | 446 | buf->f_frsize = dentry->d_sb->s_blocksize; |
f7b422b1 DH |
447 | |
448 | /* | |
449 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
450 | * are reported in units of f_frsize. Linux hasn't had | |
451 | * an f_frsize field in its statfs struct until recently, | |
452 | * thus historically Linux's sys_statfs reports these | |
453 | * fields in units of f_bsize. | |
454 | */ | |
0c7d90cf DH |
455 | buf->f_bsize = dentry->d_sb->s_blocksize; |
456 | blockbits = dentry->d_sb->s_blocksize_bits; | |
f7b422b1 DH |
457 | blockres = (1 << blockbits) - 1; |
458 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
459 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
460 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
461 | ||
462 | buf->f_files = res.tfiles; | |
463 | buf->f_ffree = res.afiles; | |
464 | ||
465 | buf->f_namelen = server->namelen; | |
1a0ba9ae | 466 | |
f7b422b1 DH |
467 | return 0; |
468 | ||
469 | out_err: | |
3110ff80 | 470 | dprintk("%s: statfs error = %d\n", __func__, -error); |
1a0ba9ae | 471 | return error; |
f7b422b1 DH |
472 | } |
473 | ||
7d4e2747 DH |
474 | /* |
475 | * Map the security flavour number to a name | |
476 | */ | |
81039f1f TM |
477 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
478 | { | |
7d4e2747 | 479 | static const struct { |
81039f1f TM |
480 | rpc_authflavor_t flavour; |
481 | const char *str; | |
482 | } sec_flavours[] = { | |
483 | { RPC_AUTH_NULL, "null" }, | |
484 | { RPC_AUTH_UNIX, "sys" }, | |
485 | { RPC_AUTH_GSS_KRB5, "krb5" }, | |
486 | { RPC_AUTH_GSS_KRB5I, "krb5i" }, | |
487 | { RPC_AUTH_GSS_KRB5P, "krb5p" }, | |
488 | { RPC_AUTH_GSS_LKEY, "lkey" }, | |
489 | { RPC_AUTH_GSS_LKEYI, "lkeyi" }, | |
490 | { RPC_AUTH_GSS_LKEYP, "lkeyp" }, | |
491 | { RPC_AUTH_GSS_SPKM, "spkm" }, | |
492 | { RPC_AUTH_GSS_SPKMI, "spkmi" }, | |
493 | { RPC_AUTH_GSS_SPKMP, "spkmp" }, | |
4d81cd16 | 494 | { UINT_MAX, "unknown" } |
81039f1f TM |
495 | }; |
496 | int i; | |
497 | ||
4d81cd16 | 498 | for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) { |
81039f1f TM |
499 | if (sec_flavours[i].flavour == flavour) |
500 | break; | |
501 | } | |
502 | return sec_flavours[i].str; | |
503 | } | |
504 | ||
ee671b01 JL |
505 | static void nfs_show_mountd_netid(struct seq_file *m, struct nfs_server *nfss, |
506 | int showdefaults) | |
507 | { | |
508 | struct sockaddr *sap = (struct sockaddr *) &nfss->mountd_address; | |
509 | ||
510 | seq_printf(m, ",mountproto="); | |
511 | switch (sap->sa_family) { | |
512 | case AF_INET: | |
513 | switch (nfss->mountd_protocol) { | |
514 | case IPPROTO_UDP: | |
515 | seq_printf(m, RPCBIND_NETID_UDP); | |
516 | break; | |
517 | case IPPROTO_TCP: | |
518 | seq_printf(m, RPCBIND_NETID_TCP); | |
519 | break; | |
520 | default: | |
521 | if (showdefaults) | |
522 | seq_printf(m, "auto"); | |
523 | } | |
524 | break; | |
525 | case AF_INET6: | |
526 | switch (nfss->mountd_protocol) { | |
527 | case IPPROTO_UDP: | |
528 | seq_printf(m, RPCBIND_NETID_UDP6); | |
529 | break; | |
530 | case IPPROTO_TCP: | |
531 | seq_printf(m, RPCBIND_NETID_TCP6); | |
532 | break; | |
533 | default: | |
534 | if (showdefaults) | |
535 | seq_printf(m, "auto"); | |
536 | } | |
537 | break; | |
538 | default: | |
539 | if (showdefaults) | |
540 | seq_printf(m, "auto"); | |
541 | } | |
542 | } | |
543 | ||
82d101d5 CL |
544 | static void nfs_show_mountd_options(struct seq_file *m, struct nfs_server *nfss, |
545 | int showdefaults) | |
546 | { | |
547 | struct sockaddr *sap = (struct sockaddr *)&nfss->mountd_address; | |
548 | ||
549 | switch (sap->sa_family) { | |
550 | case AF_INET: { | |
551 | struct sockaddr_in *sin = (struct sockaddr_in *)sap; | |
be859405 | 552 | seq_printf(m, ",mountaddr=%pI4", &sin->sin_addr.s_addr); |
82d101d5 CL |
553 | break; |
554 | } | |
555 | case AF_INET6: { | |
556 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
d250e190 | 557 | seq_printf(m, ",mountaddr=%pI6c", &sin6->sin6_addr); |
82d101d5 CL |
558 | break; |
559 | } | |
560 | default: | |
561 | if (showdefaults) | |
562 | seq_printf(m, ",mountaddr=unspecified"); | |
563 | } | |
564 | ||
565 | if (nfss->mountd_version || showdefaults) | |
566 | seq_printf(m, ",mountvers=%u", nfss->mountd_version); | |
567 | if (nfss->mountd_port || showdefaults) | |
568 | seq_printf(m, ",mountport=%u", nfss->mountd_port); | |
569 | ||
ee671b01 | 570 | nfs_show_mountd_netid(m, nfss, showdefaults); |
82d101d5 CL |
571 | } |
572 | ||
f7b422b1 DH |
573 | /* |
574 | * Describe the mount options in force on this server representation | |
575 | */ | |
82d101d5 CL |
576 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, |
577 | int showdefaults) | |
f7b422b1 | 578 | { |
509de811 | 579 | static const struct proc_nfs_info { |
f7b422b1 | 580 | int flag; |
509de811 DH |
581 | const char *str; |
582 | const char *nostr; | |
f7b422b1 DH |
583 | } nfs_info[] = { |
584 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, | |
82d101d5 | 585 | { NFS_MOUNT_POSIX, ",posix", "" }, |
f7b422b1 DH |
586 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
587 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
588 | { NFS_MOUNT_NONLM, ",nolock", "" }, | |
589 | { NFS_MOUNT_NOACL, ",noacl", "" }, | |
74dd34e6 | 590 | { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" }, |
d740351b CL |
591 | { NFS_MOUNT_UNSHARED, ",nosharecache", "" }, |
592 | { NFS_MOUNT_NORESVPORT, ",noresvport", "" }, | |
f7b422b1 DH |
593 | { 0, NULL, NULL } |
594 | }; | |
509de811 | 595 | const struct proc_nfs_info *nfs_infop; |
8fa5c000 | 596 | struct nfs_client *clp = nfss->nfs_client; |
82d101d5 | 597 | u32 version = clp->rpc_ops->version; |
f7b422b1 | 598 | |
82d101d5 | 599 | seq_printf(m, ",vers=%u", version); |
2d767432 CL |
600 | seq_printf(m, ",rsize=%u", nfss->rsize); |
601 | seq_printf(m, ",wsize=%u", nfss->wsize); | |
82d101d5 CL |
602 | if (nfss->bsize != 0) |
603 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
604 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
0e0cab74 | 605 | if (nfss->acregmin != NFS_DEF_ACREGMIN*HZ || showdefaults) |
2d767432 | 606 | seq_printf(m, ",acregmin=%u", nfss->acregmin/HZ); |
0e0cab74 | 607 | if (nfss->acregmax != NFS_DEF_ACREGMAX*HZ || showdefaults) |
2d767432 | 608 | seq_printf(m, ",acregmax=%u", nfss->acregmax/HZ); |
0e0cab74 | 609 | if (nfss->acdirmin != NFS_DEF_ACDIRMIN*HZ || showdefaults) |
2d767432 | 610 | seq_printf(m, ",acdirmin=%u", nfss->acdirmin/HZ); |
0e0cab74 | 611 | if (nfss->acdirmax != NFS_DEF_ACDIRMAX*HZ || showdefaults) |
2d767432 | 612 | seq_printf(m, ",acdirmax=%u", nfss->acdirmax/HZ); |
f7b422b1 DH |
613 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { |
614 | if (nfss->flags & nfs_infop->flag) | |
615 | seq_puts(m, nfs_infop->str); | |
616 | else | |
617 | seq_puts(m, nfs_infop->nostr); | |
618 | } | |
56928edd | 619 | seq_printf(m, ",proto=%s", |
ee671b01 | 620 | rpc_peeraddr2str(nfss->client, RPC_DISPLAY_NETID)); |
82d101d5 CL |
621 | if (version == 4) { |
622 | if (nfss->port != NFS_PORT) | |
623 | seq_printf(m, ",port=%u", nfss->port); | |
624 | } else | |
625 | if (nfss->port) | |
626 | seq_printf(m, ",port=%u", nfss->port); | |
627 | ||
33170233 TM |
628 | seq_printf(m, ",timeo=%lu", 10U * nfss->client->cl_timeout->to_initval / HZ); |
629 | seq_printf(m, ",retrans=%u", nfss->client->cl_timeout->to_retries); | |
81039f1f | 630 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
82d101d5 CL |
631 | |
632 | if (version != 4) | |
633 | nfs_show_mountd_options(m, nfss, showdefaults); | |
634 | ||
635 | #ifdef CONFIG_NFS_V4 | |
636 | if (clp->rpc_ops->version == 4) | |
637 | seq_printf(m, ",clientaddr=%s", clp->cl_ipaddr); | |
638 | #endif | |
b797cac7 DH |
639 | if (nfss->options & NFS_OPTION_FSCACHE) |
640 | seq_printf(m, ",fsc"); | |
f7b422b1 DH |
641 | } |
642 | ||
643 | /* | |
644 | * Describe the mount options on this VFS mountpoint | |
645 | */ | |
646 | static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) | |
647 | { | |
648 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
649 | ||
650 | nfs_show_mount_options(m, nfss, 0); | |
651 | ||
5d8515ca CL |
652 | seq_printf(m, ",addr=%s", |
653 | rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient, | |
654 | RPC_DISPLAY_ADDR)); | |
f7b422b1 DH |
655 | |
656 | return 0; | |
657 | } | |
658 | ||
659 | /* | |
660 | * Present statistical information for this VFS mountpoint | |
661 | */ | |
662 | static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) | |
663 | { | |
664 | int i, cpu; | |
665 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
666 | struct rpc_auth *auth = nfss->client->cl_auth; | |
667 | struct nfs_iostats totals = { }; | |
668 | ||
669 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
670 | ||
671 | /* | |
672 | * Display all mount option settings | |
673 | */ | |
674 | seq_printf(m, "\n\topts:\t"); | |
675 | seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw"); | |
676 | seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); | |
677 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : ""); | |
678 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); | |
679 | nfs_show_mount_options(m, nfss, 1); | |
680 | ||
681 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); | |
682 | ||
683 | seq_printf(m, "\n\tcaps:\t"); | |
684 | seq_printf(m, "caps=0x%x", nfss->caps); | |
2d767432 CL |
685 | seq_printf(m, ",wtmult=%u", nfss->wtmult); |
686 | seq_printf(m, ",dtsize=%u", nfss->dtsize); | |
687 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
688 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
f7b422b1 DH |
689 | |
690 | #ifdef CONFIG_NFS_V4 | |
40c55319 | 691 | if (nfss->nfs_client->rpc_ops->version == 4) { |
f7b422b1 DH |
692 | seq_printf(m, "\n\tnfsv4:\t"); |
693 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); | |
694 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
695 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); | |
696 | } | |
697 | #endif | |
698 | ||
699 | /* | |
700 | * Display security flavor in effect for this mount | |
701 | */ | |
2d767432 | 702 | seq_printf(m, "\n\tsec:\tflavor=%u", auth->au_ops->au_flavor); |
f7b422b1 | 703 | if (auth->au_flavor) |
2d767432 | 704 | seq_printf(m, ",pseudoflavor=%u", auth->au_flavor); |
f7b422b1 DH |
705 | |
706 | /* | |
707 | * Display superblock I/O counters | |
708 | */ | |
709 | for_each_possible_cpu(cpu) { | |
710 | struct nfs_iostats *stats; | |
711 | ||
712 | preempt_disable(); | |
713 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
714 | ||
715 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
716 | totals.events[i] += stats->events[i]; | |
717 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
718 | totals.bytes[i] += stats->bytes[i]; | |
6a51091d DH |
719 | #ifdef CONFIG_NFS_FSCACHE |
720 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
721 | totals.fscache[i] += stats->fscache[i]; | |
722 | #endif | |
f7b422b1 DH |
723 | |
724 | preempt_enable(); | |
725 | } | |
726 | ||
727 | seq_printf(m, "\n\tevents:\t"); | |
728 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
729 | seq_printf(m, "%lu ", totals.events[i]); | |
730 | seq_printf(m, "\n\tbytes:\t"); | |
731 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
732 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
6a51091d DH |
733 | #ifdef CONFIG_NFS_FSCACHE |
734 | if (nfss->options & NFS_OPTION_FSCACHE) { | |
735 | seq_printf(m, "\n\tfsc:\t"); | |
736 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
737 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
738 | } | |
739 | #endif | |
f7b422b1 DH |
740 | seq_printf(m, "\n"); |
741 | ||
742 | rpc_print_iostats(m, nfss->client); | |
743 | ||
744 | return 0; | |
745 | } | |
746 | ||
747 | /* | |
748 | * Begin unmount by attempting to remove all automounted mountpoints we added | |
54ceac45 | 749 | * in response to xdev traversals and referrals |
f7b422b1 | 750 | */ |
42faad99 | 751 | static void nfs_umount_begin(struct super_block *sb) |
f7b422b1 | 752 | { |
67e55205 | 753 | struct nfs_server *server; |
fc6ae3cf TM |
754 | struct rpc_clnt *rpc; |
755 | ||
67e55205 | 756 | server = NFS_SB(sb); |
fc6ae3cf TM |
757 | /* -EIO all pending I/O */ |
758 | rpc = server->client_acl; | |
759 | if (!IS_ERR(rpc)) | |
760 | rpc_killall_tasks(rpc); | |
761 | rpc = server->client; | |
762 | if (!IS_ERR(rpc)) | |
763 | rpc_killall_tasks(rpc); | |
f7b422b1 DH |
764 | } |
765 | ||
c5811dbd | 766 | static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(unsigned int version) |
9423a08a CL |
767 | { |
768 | struct nfs_parsed_mount_data *data; | |
769 | ||
770 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
771 | if (data) { | |
9423a08a CL |
772 | data->acregmin = NFS_DEF_ACREGMIN; |
773 | data->acregmax = NFS_DEF_ACREGMAX; | |
774 | data->acdirmin = NFS_DEF_ACDIRMIN; | |
775 | data->acdirmax = NFS_DEF_ACDIRMAX; | |
c5811dbd | 776 | data->mount_server.port = NFS_UNSPEC_PORT; |
9423a08a | 777 | data->nfs_server.port = NFS_UNSPEC_PORT; |
c5811dbd | 778 | data->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
9423a08a CL |
779 | data->auth_flavors[0] = RPC_AUTH_UNIX; |
780 | data->auth_flavor_len = 1; | |
c5811dbd | 781 | data->version = version; |
9423a08a CL |
782 | data->minorversion = 0; |
783 | } | |
784 | return data; | |
785 | } | |
786 | ||
fc50d58f | 787 | /* |
cdcd7f9a CL |
788 | * Sanity-check a server address provided by the mount command. |
789 | * | |
790 | * Address family must be initialized, and address must not be | |
791 | * the ANY address for that family. | |
fc50d58f CL |
792 | */ |
793 | static int nfs_verify_server_address(struct sockaddr *addr) | |
794 | { | |
795 | switch (addr->sa_family) { | |
796 | case AF_INET: { | |
cdcd7f9a | 797 | struct sockaddr_in *sa = (struct sockaddr_in *)addr; |
e6f1cebf | 798 | return sa->sin_addr.s_addr != htonl(INADDR_ANY); |
cdcd7f9a CL |
799 | } |
800 | case AF_INET6: { | |
801 | struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr; | |
802 | return !ipv6_addr_any(sa); | |
fc50d58f CL |
803 | } |
804 | } | |
805 | ||
53a0b9c4 | 806 | dfprintk(MOUNT, "NFS: Invalid IP address specified\n"); |
fc50d58f CL |
807 | return 0; |
808 | } | |
809 | ||
4cfd74fc CL |
810 | /* |
811 | * Select between a default port value and a user-specified port value. | |
812 | * If a zero value is set, then autobind will be used. | |
813 | */ | |
f5855fec | 814 | static void nfs_set_port(struct sockaddr *sap, int *port, |
4cfd74fc CL |
815 | const unsigned short default_port) |
816 | { | |
f5855fec TM |
817 | if (*port == NFS_UNSPEC_PORT) |
818 | *port = default_port; | |
4cfd74fc | 819 | |
f5855fec | 820 | rpc_set_port(sap, *port); |
4cfd74fc CL |
821 | } |
822 | ||
259875ef TM |
823 | /* |
824 | * Sanity check the NFS transport protocol. | |
825 | * | |
826 | */ | |
827 | static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
828 | { | |
829 | switch (mnt->nfs_server.protocol) { | |
830 | case XPRT_TRANSPORT_UDP: | |
831 | case XPRT_TRANSPORT_TCP: | |
832 | case XPRT_TRANSPORT_RDMA: | |
833 | break; | |
834 | default: | |
835 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; | |
836 | } | |
837 | } | |
838 | ||
839 | /* | |
840 | * For text based NFSv2/v3 mounts, the mount protocol transport default | |
841 | * settings should depend upon the specified NFS transport. | |
842 | */ | |
843 | static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
844 | { | |
845 | nfs_validate_transport_protocol(mnt); | |
846 | ||
847 | if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP || | |
848 | mnt->mount_server.protocol == XPRT_TRANSPORT_TCP) | |
849 | return; | |
850 | switch (mnt->nfs_server.protocol) { | |
851 | case XPRT_TRANSPORT_UDP: | |
852 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; | |
853 | break; | |
854 | case XPRT_TRANSPORT_TCP: | |
855 | case XPRT_TRANSPORT_RDMA: | |
856 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; | |
857 | } | |
858 | } | |
859 | ||
01060c89 CL |
860 | /* |
861 | * Parse the value of the 'sec=' option. | |
01060c89 CL |
862 | */ |
863 | static int nfs_parse_security_flavors(char *value, | |
864 | struct nfs_parsed_mount_data *mnt) | |
865 | { | |
866 | substring_t args[MAX_OPT_ARGS]; | |
867 | ||
868 | dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); | |
869 | ||
870 | switch (match_token(value, nfs_secflavor_tokens, args)) { | |
871 | case Opt_sec_none: | |
01060c89 CL |
872 | mnt->auth_flavors[0] = RPC_AUTH_NULL; |
873 | break; | |
874 | case Opt_sec_sys: | |
01060c89 CL |
875 | mnt->auth_flavors[0] = RPC_AUTH_UNIX; |
876 | break; | |
877 | case Opt_sec_krb5: | |
01060c89 CL |
878 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5; |
879 | break; | |
880 | case Opt_sec_krb5i: | |
01060c89 CL |
881 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I; |
882 | break; | |
883 | case Opt_sec_krb5p: | |
01060c89 CL |
884 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P; |
885 | break; | |
886 | case Opt_sec_lkey: | |
01060c89 CL |
887 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY; |
888 | break; | |
889 | case Opt_sec_lkeyi: | |
01060c89 CL |
890 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI; |
891 | break; | |
892 | case Opt_sec_lkeyp: | |
01060c89 CL |
893 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP; |
894 | break; | |
895 | case Opt_sec_spkm: | |
01060c89 CL |
896 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM; |
897 | break; | |
898 | case Opt_sec_spkmi: | |
01060c89 CL |
899 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI; |
900 | break; | |
901 | case Opt_sec_spkmp: | |
01060c89 CL |
902 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP; |
903 | break; | |
904 | default: | |
905 | return 0; | |
906 | } | |
907 | ||
059f90b3 | 908 | mnt->auth_flavor_len = 1; |
01060c89 CL |
909 | return 1; |
910 | } | |
911 | ||
bf0fd768 CL |
912 | /* |
913 | * Error-check and convert a string of mount options from user space into | |
f45663ce CL |
914 | * a data structure. The whole mount string is processed; bad options are |
915 | * skipped as they are encountered. If there were no errors, return 1; | |
916 | * otherwise return 0 (zero). | |
bf0fd768 CL |
917 | */ |
918 | static int nfs_parse_mount_options(char *raw, | |
919 | struct nfs_parsed_mount_data *mnt) | |
920 | { | |
f9c3a380 | 921 | char *p, *string, *secdata; |
d23c45fd | 922 | int rc, sloppy = 0, invalid_option = 0; |
ee671b01 JL |
923 | unsigned short protofamily = AF_UNSPEC; |
924 | unsigned short mountfamily = AF_UNSPEC; | |
bf0fd768 CL |
925 | |
926 | if (!raw) { | |
927 | dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); | |
928 | return 1; | |
929 | } | |
930 | dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); | |
931 | ||
f9c3a380 EP |
932 | secdata = alloc_secdata(); |
933 | if (!secdata) | |
934 | goto out_nomem; | |
935 | ||
936 | rc = security_sb_copy_data(raw, secdata); | |
937 | if (rc) | |
938 | goto out_security_failure; | |
939 | ||
940 | rc = security_sb_parse_opts_str(secdata, &mnt->lsm_opts); | |
941 | if (rc) | |
942 | goto out_security_failure; | |
943 | ||
944 | free_secdata(secdata); | |
945 | ||
bf0fd768 CL |
946 | while ((p = strsep(&raw, ",")) != NULL) { |
947 | substring_t args[MAX_OPT_ARGS]; | |
a5a16bae CL |
948 | unsigned long option; |
949 | int token; | |
bf0fd768 CL |
950 | |
951 | if (!*p) | |
952 | continue; | |
953 | ||
954 | dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); | |
955 | ||
956 | token = match_token(p, nfs_mount_option_tokens, args); | |
957 | switch (token) { | |
f45663ce CL |
958 | |
959 | /* | |
960 | * boolean options: foo/nofoo | |
961 | */ | |
bf0fd768 CL |
962 | case Opt_soft: |
963 | mnt->flags |= NFS_MOUNT_SOFT; | |
964 | break; | |
965 | case Opt_hard: | |
966 | mnt->flags &= ~NFS_MOUNT_SOFT; | |
967 | break; | |
bf0fd768 CL |
968 | case Opt_posix: |
969 | mnt->flags |= NFS_MOUNT_POSIX; | |
970 | break; | |
971 | case Opt_noposix: | |
972 | mnt->flags &= ~NFS_MOUNT_POSIX; | |
973 | break; | |
974 | case Opt_cto: | |
975 | mnt->flags &= ~NFS_MOUNT_NOCTO; | |
976 | break; | |
977 | case Opt_nocto: | |
978 | mnt->flags |= NFS_MOUNT_NOCTO; | |
979 | break; | |
980 | case Opt_ac: | |
981 | mnt->flags &= ~NFS_MOUNT_NOAC; | |
982 | break; | |
983 | case Opt_noac: | |
984 | mnt->flags |= NFS_MOUNT_NOAC; | |
985 | break; | |
986 | case Opt_lock: | |
987 | mnt->flags &= ~NFS_MOUNT_NONLM; | |
988 | break; | |
989 | case Opt_nolock: | |
990 | mnt->flags |= NFS_MOUNT_NONLM; | |
991 | break; | |
992 | case Opt_v2: | |
993 | mnt->flags &= ~NFS_MOUNT_VER3; | |
764302cc | 994 | mnt->version = 2; |
bf0fd768 CL |
995 | break; |
996 | case Opt_v3: | |
997 | mnt->flags |= NFS_MOUNT_VER3; | |
764302cc | 998 | mnt->version = 3; |
bf0fd768 | 999 | break; |
764302cc CL |
1000 | #ifdef CONFIG_NFS_V4 |
1001 | case Opt_v4: | |
1002 | mnt->flags &= ~NFS_MOUNT_VER3; | |
1003 | mnt->version = 4; | |
1004 | break; | |
1005 | #endif | |
bf0fd768 CL |
1006 | case Opt_udp: |
1007 | mnt->flags &= ~NFS_MOUNT_TCP; | |
0896a725 | 1008 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 CL |
1009 | break; |
1010 | case Opt_tcp: | |
1011 | mnt->flags |= NFS_MOUNT_TCP; | |
0896a725 | 1012 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1013 | break; |
2cf7ff7a TT |
1014 | case Opt_rdma: |
1015 | mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ | |
1016 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 1017 | xprt_load_transport(p); |
2cf7ff7a | 1018 | break; |
bf0fd768 CL |
1019 | case Opt_acl: |
1020 | mnt->flags &= ~NFS_MOUNT_NOACL; | |
1021 | break; | |
1022 | case Opt_noacl: | |
1023 | mnt->flags |= NFS_MOUNT_NOACL; | |
1024 | break; | |
1025 | case Opt_rdirplus: | |
1026 | mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; | |
1027 | break; | |
1028 | case Opt_nordirplus: | |
1029 | mnt->flags |= NFS_MOUNT_NORDIRPLUS; | |
1030 | break; | |
75180df2 TM |
1031 | case Opt_sharecache: |
1032 | mnt->flags &= ~NFS_MOUNT_UNSHARED; | |
1033 | break; | |
1034 | case Opt_nosharecache: | |
1035 | mnt->flags |= NFS_MOUNT_UNSHARED; | |
1036 | break; | |
d740351b CL |
1037 | case Opt_resvport: |
1038 | mnt->flags &= ~NFS_MOUNT_NORESVPORT; | |
1039 | break; | |
1040 | case Opt_noresvport: | |
1041 | mnt->flags |= NFS_MOUNT_NORESVPORT; | |
1042 | break; | |
b797cac7 DH |
1043 | case Opt_fscache: |
1044 | mnt->options |= NFS_OPTION_FSCACHE; | |
1045 | kfree(mnt->fscache_uniq); | |
1046 | mnt->fscache_uniq = NULL; | |
1047 | break; | |
1048 | case Opt_nofscache: | |
1049 | mnt->options &= ~NFS_OPTION_FSCACHE; | |
1050 | kfree(mnt->fscache_uniq); | |
1051 | mnt->fscache_uniq = NULL; | |
1052 | break; | |
bf0fd768 | 1053 | |
f45663ce CL |
1054 | /* |
1055 | * options that take numeric values | |
1056 | */ | |
bf0fd768 | 1057 | case Opt_port: |
a5a16bae CL |
1058 | string = match_strdup(args); |
1059 | if (string == NULL) | |
1060 | goto out_nomem; | |
1061 | rc = strict_strtoul(string, 10, &option); | |
1062 | kfree(string); | |
4be929be | 1063 | if (rc != 0 || option > USHRT_MAX) |
d23c45fd CL |
1064 | goto out_invalid_value; |
1065 | mnt->nfs_server.port = option; | |
bf0fd768 CL |
1066 | break; |
1067 | case Opt_rsize: | |
a5a16bae CL |
1068 | string = match_strdup(args); |
1069 | if (string == NULL) | |
1070 | goto out_nomem; | |
1071 | rc = strict_strtoul(string, 10, &option); | |
1072 | kfree(string); | |
1073 | if (rc != 0) | |
d23c45fd CL |
1074 | goto out_invalid_value; |
1075 | mnt->rsize = option; | |
bf0fd768 CL |
1076 | break; |
1077 | case Opt_wsize: | |
a5a16bae CL |
1078 | string = match_strdup(args); |
1079 | if (string == NULL) | |
1080 | goto out_nomem; | |
1081 | rc = strict_strtoul(string, 10, &option); | |
1082 | kfree(string); | |
1083 | if (rc != 0) | |
d23c45fd CL |
1084 | goto out_invalid_value; |
1085 | mnt->wsize = option; | |
bf0fd768 CL |
1086 | break; |
1087 | case Opt_bsize: | |
a5a16bae CL |
1088 | string = match_strdup(args); |
1089 | if (string == NULL) | |
1090 | goto out_nomem; | |
1091 | rc = strict_strtoul(string, 10, &option); | |
1092 | kfree(string); | |
1093 | if (rc != 0) | |
d23c45fd CL |
1094 | goto out_invalid_value; |
1095 | mnt->bsize = option; | |
bf0fd768 CL |
1096 | break; |
1097 | case Opt_timeo: | |
a5a16bae CL |
1098 | string = match_strdup(args); |
1099 | if (string == NULL) | |
1100 | goto out_nomem; | |
1101 | rc = strict_strtoul(string, 10, &option); | |
1102 | kfree(string); | |
1103 | if (rc != 0 || option == 0) | |
d23c45fd CL |
1104 | goto out_invalid_value; |
1105 | mnt->timeo = option; | |
bf0fd768 CL |
1106 | break; |
1107 | case Opt_retrans: | |
a5a16bae CL |
1108 | string = match_strdup(args); |
1109 | if (string == NULL) | |
1110 | goto out_nomem; | |
1111 | rc = strict_strtoul(string, 10, &option); | |
1112 | kfree(string); | |
1113 | if (rc != 0 || option == 0) | |
d23c45fd CL |
1114 | goto out_invalid_value; |
1115 | mnt->retrans = option; | |
bf0fd768 CL |
1116 | break; |
1117 | case Opt_acregmin: | |
a5a16bae CL |
1118 | string = match_strdup(args); |
1119 | if (string == NULL) | |
1120 | goto out_nomem; | |
1121 | rc = strict_strtoul(string, 10, &option); | |
1122 | kfree(string); | |
1123 | if (rc != 0) | |
d23c45fd CL |
1124 | goto out_invalid_value; |
1125 | mnt->acregmin = option; | |
bf0fd768 CL |
1126 | break; |
1127 | case Opt_acregmax: | |
a5a16bae CL |
1128 | string = match_strdup(args); |
1129 | if (string == NULL) | |
1130 | goto out_nomem; | |
1131 | rc = strict_strtoul(string, 10, &option); | |
1132 | kfree(string); | |
1133 | if (rc != 0) | |
d23c45fd CL |
1134 | goto out_invalid_value; |
1135 | mnt->acregmax = option; | |
bf0fd768 CL |
1136 | break; |
1137 | case Opt_acdirmin: | |
a5a16bae CL |
1138 | string = match_strdup(args); |
1139 | if (string == NULL) | |
1140 | goto out_nomem; | |
1141 | rc = strict_strtoul(string, 10, &option); | |
1142 | kfree(string); | |
1143 | if (rc != 0) | |
d23c45fd CL |
1144 | goto out_invalid_value; |
1145 | mnt->acdirmin = option; | |
bf0fd768 CL |
1146 | break; |
1147 | case Opt_acdirmax: | |
a5a16bae CL |
1148 | string = match_strdup(args); |
1149 | if (string == NULL) | |
1150 | goto out_nomem; | |
1151 | rc = strict_strtoul(string, 10, &option); | |
1152 | kfree(string); | |
1153 | if (rc != 0) | |
d23c45fd CL |
1154 | goto out_invalid_value; |
1155 | mnt->acdirmax = option; | |
bf0fd768 CL |
1156 | break; |
1157 | case Opt_actimeo: | |
a5a16bae CL |
1158 | string = match_strdup(args); |
1159 | if (string == NULL) | |
1160 | goto out_nomem; | |
1161 | rc = strict_strtoul(string, 10, &option); | |
1162 | kfree(string); | |
1163 | if (rc != 0) | |
d23c45fd CL |
1164 | goto out_invalid_value; |
1165 | mnt->acregmin = mnt->acregmax = | |
1166 | mnt->acdirmin = mnt->acdirmax = option; | |
bf0fd768 CL |
1167 | break; |
1168 | case Opt_namelen: | |
a5a16bae CL |
1169 | string = match_strdup(args); |
1170 | if (string == NULL) | |
1171 | goto out_nomem; | |
1172 | rc = strict_strtoul(string, 10, &option); | |
1173 | kfree(string); | |
1174 | if (rc != 0) | |
d23c45fd CL |
1175 | goto out_invalid_value; |
1176 | mnt->namlen = option; | |
bf0fd768 CL |
1177 | break; |
1178 | case Opt_mountport: | |
a5a16bae CL |
1179 | string = match_strdup(args); |
1180 | if (string == NULL) | |
1181 | goto out_nomem; | |
1182 | rc = strict_strtoul(string, 10, &option); | |
1183 | kfree(string); | |
4be929be | 1184 | if (rc != 0 || option > USHRT_MAX) |
d23c45fd CL |
1185 | goto out_invalid_value; |
1186 | mnt->mount_server.port = option; | |
bf0fd768 | 1187 | break; |
bf0fd768 | 1188 | case Opt_mountvers: |
a5a16bae CL |
1189 | string = match_strdup(args); |
1190 | if (string == NULL) | |
1191 | goto out_nomem; | |
1192 | rc = strict_strtoul(string, 10, &option); | |
1193 | kfree(string); | |
1194 | if (rc != 0 || | |
f45663ce | 1195 | option < NFS_MNT_VERSION || |
d23c45fd CL |
1196 | option > NFS_MNT3_VERSION) |
1197 | goto out_invalid_value; | |
1198 | mnt->mount_server.version = option; | |
bf0fd768 | 1199 | break; |
bf0fd768 | 1200 | case Opt_nfsvers: |
a5a16bae CL |
1201 | string = match_strdup(args); |
1202 | if (string == NULL) | |
1203 | goto out_nomem; | |
1204 | rc = strict_strtoul(string, 10, &option); | |
1205 | kfree(string); | |
1206 | if (rc != 0) | |
d23c45fd | 1207 | goto out_invalid_value; |
bf0fd768 | 1208 | switch (option) { |
f45663ce | 1209 | case NFS2_VERSION: |
bf0fd768 | 1210 | mnt->flags &= ~NFS_MOUNT_VER3; |
764302cc | 1211 | mnt->version = 2; |
bf0fd768 | 1212 | break; |
f45663ce | 1213 | case NFS3_VERSION: |
bf0fd768 | 1214 | mnt->flags |= NFS_MOUNT_VER3; |
764302cc CL |
1215 | mnt->version = 3; |
1216 | break; | |
1217 | #ifdef CONFIG_NFS_V4 | |
1218 | case NFS4_VERSION: | |
1219 | mnt->flags &= ~NFS_MOUNT_VER3; | |
1220 | mnt->version = 4; | |
bf0fd768 | 1221 | break; |
764302cc | 1222 | #endif |
bf0fd768 | 1223 | default: |
d23c45fd | 1224 | goto out_invalid_value; |
bf0fd768 CL |
1225 | } |
1226 | break; | |
3fd5be9e | 1227 | case Opt_minorversion: |
f3f4f4ed CL |
1228 | string = match_strdup(args); |
1229 | if (string == NULL) | |
1230 | goto out_nomem; | |
1231 | rc = strict_strtoul(string, 10, &option); | |
1232 | kfree(string); | |
1233 | if (rc != 0) | |
1234 | goto out_invalid_value; | |
1235 | if (option > NFS4_MAX_MINOR_VERSION) | |
1236 | goto out_invalid_value; | |
1237 | mnt->minorversion = option; | |
3fd5be9e | 1238 | break; |
bf0fd768 | 1239 | |
f45663ce CL |
1240 | /* |
1241 | * options that take text values | |
1242 | */ | |
bf0fd768 CL |
1243 | case Opt_sec: |
1244 | string = match_strdup(args); | |
1245 | if (string == NULL) | |
1246 | goto out_nomem; | |
01060c89 | 1247 | rc = nfs_parse_security_flavors(string, mnt); |
bf0fd768 | 1248 | kfree(string); |
f45663ce | 1249 | if (!rc) { |
f45663ce CL |
1250 | dfprintk(MOUNT, "NFS: unrecognized " |
1251 | "security flavor\n"); | |
d23c45fd | 1252 | return 0; |
f45663ce | 1253 | } |
bf0fd768 CL |
1254 | break; |
1255 | case Opt_proto: | |
1256 | string = match_strdup(args); | |
1257 | if (string == NULL) | |
1258 | goto out_nomem; | |
1259 | token = match_token(string, | |
1260 | nfs_xprt_protocol_tokens, args); | |
bf0fd768 | 1261 | |
ee671b01 | 1262 | protofamily = AF_INET; |
bf0fd768 | 1263 | switch (token) { |
ee671b01 JL |
1264 | case Opt_xprt_udp6: |
1265 | protofamily = AF_INET6; | |
fdb66ff4 | 1266 | case Opt_xprt_udp: |
bf0fd768 | 1267 | mnt->flags &= ~NFS_MOUNT_TCP; |
0896a725 | 1268 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
d23c45fd | 1269 | kfree(string); |
bf0fd768 | 1270 | break; |
ee671b01 JL |
1271 | case Opt_xprt_tcp6: |
1272 | protofamily = AF_INET6; | |
fdb66ff4 | 1273 | case Opt_xprt_tcp: |
bf0fd768 | 1274 | mnt->flags |= NFS_MOUNT_TCP; |
0896a725 | 1275 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
d23c45fd | 1276 | kfree(string); |
bf0fd768 | 1277 | break; |
2cf7ff7a TT |
1278 | case Opt_xprt_rdma: |
1279 | /* vector side protocols to TCP */ | |
1280 | mnt->flags |= NFS_MOUNT_TCP; | |
1281 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 1282 | xprt_load_transport(string); |
d23c45fd | 1283 | kfree(string); |
2cf7ff7a | 1284 | break; |
bf0fd768 | 1285 | default: |
f45663ce CL |
1286 | dfprintk(MOUNT, "NFS: unrecognized " |
1287 | "transport protocol\n"); | |
4223a4a1 | 1288 | kfree(string); |
d23c45fd | 1289 | return 0; |
bf0fd768 CL |
1290 | } |
1291 | break; | |
1292 | case Opt_mountproto: | |
1293 | string = match_strdup(args); | |
1294 | if (string == NULL) | |
1295 | goto out_nomem; | |
1296 | token = match_token(string, | |
1297 | nfs_xprt_protocol_tokens, args); | |
d508afb4 | 1298 | kfree(string); |
bf0fd768 | 1299 | |
ee671b01 | 1300 | mountfamily = AF_INET; |
bf0fd768 | 1301 | switch (token) { |
ee671b01 JL |
1302 | case Opt_xprt_udp6: |
1303 | mountfamily = AF_INET6; | |
fdb66ff4 | 1304 | case Opt_xprt_udp: |
0896a725 | 1305 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 | 1306 | break; |
ee671b01 JL |
1307 | case Opt_xprt_tcp6: |
1308 | mountfamily = AF_INET6; | |
fdb66ff4 | 1309 | case Opt_xprt_tcp: |
0896a725 | 1310 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1311 | break; |
2cf7ff7a | 1312 | case Opt_xprt_rdma: /* not used for side protocols */ |
bf0fd768 | 1313 | default: |
f45663ce CL |
1314 | dfprintk(MOUNT, "NFS: unrecognized " |
1315 | "transport protocol\n"); | |
d23c45fd | 1316 | return 0; |
bf0fd768 CL |
1317 | } |
1318 | break; | |
1319 | case Opt_addr: | |
1320 | string = match_strdup(args); | |
1321 | if (string == NULL) | |
1322 | goto out_nomem; | |
53a0b9c4 CL |
1323 | mnt->nfs_server.addrlen = |
1324 | rpc_pton(string, strlen(string), | |
1325 | (struct sockaddr *) | |
1326 | &mnt->nfs_server.address, | |
1327 | sizeof(mnt->nfs_server.address)); | |
bf0fd768 | 1328 | kfree(string); |
53a0b9c4 CL |
1329 | if (mnt->nfs_server.addrlen == 0) |
1330 | goto out_invalid_address; | |
bf0fd768 CL |
1331 | break; |
1332 | case Opt_clientaddr: | |
1333 | string = match_strdup(args); | |
1334 | if (string == NULL) | |
1335 | goto out_nomem; | |
fc601477 | 1336 | kfree(mnt->client_address); |
bf0fd768 CL |
1337 | mnt->client_address = string; |
1338 | break; | |
33832034 CL |
1339 | case Opt_mounthost: |
1340 | string = match_strdup(args); | |
1341 | if (string == NULL) | |
1342 | goto out_nomem; | |
fc601477 | 1343 | kfree(mnt->mount_server.hostname); |
33832034 CL |
1344 | mnt->mount_server.hostname = string; |
1345 | break; | |
0ac83779 | 1346 | case Opt_mountaddr: |
bf0fd768 CL |
1347 | string = match_strdup(args); |
1348 | if (string == NULL) | |
1349 | goto out_nomem; | |
53a0b9c4 CL |
1350 | mnt->mount_server.addrlen = |
1351 | rpc_pton(string, strlen(string), | |
1352 | (struct sockaddr *) | |
1353 | &mnt->mount_server.address, | |
1354 | sizeof(mnt->mount_server.address)); | |
bf0fd768 | 1355 | kfree(string); |
53a0b9c4 CL |
1356 | if (mnt->mount_server.addrlen == 0) |
1357 | goto out_invalid_address; | |
bf0fd768 | 1358 | break; |
7973c1f1 TM |
1359 | case Opt_lookupcache: |
1360 | string = match_strdup(args); | |
1361 | if (string == NULL) | |
1362 | goto out_nomem; | |
1363 | token = match_token(string, | |
1364 | nfs_lookupcache_tokens, args); | |
1365 | kfree(string); | |
1366 | switch (token) { | |
1367 | case Opt_lookupcache_all: | |
1368 | mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); | |
1369 | break; | |
1370 | case Opt_lookupcache_positive: | |
1371 | mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1372 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; | |
1373 | break; | |
1374 | case Opt_lookupcache_none: | |
1375 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1376 | break; | |
1377 | default: | |
7973c1f1 TM |
1378 | dfprintk(MOUNT, "NFS: invalid " |
1379 | "lookupcache argument\n"); | |
d23c45fd | 1380 | return 0; |
7973c1f1 TM |
1381 | }; |
1382 | break; | |
a6d5ff64 CL |
1383 | case Opt_fscache_uniq: |
1384 | string = match_strdup(args); | |
1385 | if (string == NULL) | |
1386 | goto out_nomem; | |
1387 | kfree(mnt->fscache_uniq); | |
1388 | mnt->fscache_uniq = string; | |
1389 | mnt->options |= NFS_OPTION_FSCACHE; | |
1390 | break; | |
bf0fd768 | 1391 | |
f45663ce CL |
1392 | /* |
1393 | * Special options | |
1394 | */ | |
1395 | case Opt_sloppy: | |
1396 | sloppy = 1; | |
1397 | dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); | |
1398 | break; | |
bf0fd768 CL |
1399 | case Opt_userspace: |
1400 | case Opt_deprecated: | |
d33e4dfe CL |
1401 | dfprintk(MOUNT, "NFS: ignoring mount option " |
1402 | "'%s'\n", p); | |
bf0fd768 CL |
1403 | break; |
1404 | ||
1405 | default: | |
d23c45fd | 1406 | invalid_option = 1; |
f45663ce CL |
1407 | dfprintk(MOUNT, "NFS: unrecognized mount option " |
1408 | "'%s'\n", p); | |
bf0fd768 CL |
1409 | } |
1410 | } | |
1411 | ||
d23c45fd CL |
1412 | if (!sloppy && invalid_option) |
1413 | return 0; | |
1414 | ||
ee671b01 JL |
1415 | /* |
1416 | * verify that any proto=/mountproto= options match the address | |
1417 | * familiies in the addr=/mountaddr= options. | |
1418 | */ | |
1419 | if (protofamily != AF_UNSPEC && | |
1420 | protofamily != mnt->nfs_server.address.ss_family) | |
1421 | goto out_proto_mismatch; | |
1422 | ||
1423 | if (mountfamily != AF_UNSPEC) { | |
1424 | if (mnt->mount_server.addrlen) { | |
1425 | if (mountfamily != mnt->mount_server.address.ss_family) | |
1426 | goto out_mountproto_mismatch; | |
1427 | } else { | |
1428 | if (mountfamily != mnt->nfs_server.address.ss_family) | |
1429 | goto out_mountproto_mismatch; | |
1430 | } | |
1431 | } | |
1432 | ||
bf0fd768 CL |
1433 | return 1; |
1434 | ||
ee671b01 JL |
1435 | out_mountproto_mismatch: |
1436 | printk(KERN_INFO "NFS: mount server address does not match mountproto= " | |
1437 | "option\n"); | |
1438 | return 0; | |
1439 | out_proto_mismatch: | |
1440 | printk(KERN_INFO "NFS: server address does not match proto= option\n"); | |
1441 | return 0; | |
53a0b9c4 CL |
1442 | out_invalid_address: |
1443 | printk(KERN_INFO "NFS: bad IP address specified: %s\n", p); | |
1444 | return 0; | |
d23c45fd | 1445 | out_invalid_value: |
53a0b9c4 | 1446 | printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); |
d23c45fd | 1447 | return 0; |
bf0fd768 CL |
1448 | out_nomem: |
1449 | printk(KERN_INFO "NFS: not enough memory to parse option\n"); | |
1450 | return 0; | |
f9c3a380 EP |
1451 | out_security_failure: |
1452 | free_secdata(secdata); | |
1453 | printk(KERN_INFO "NFS: security options invalid: %d\n", rc); | |
1454 | return 0; | |
bf0fd768 CL |
1455 | } |
1456 | ||
ec88f28d CL |
1457 | /* |
1458 | * Match the requested auth flavors with the list returned by | |
1459 | * the server. Returns zero and sets the mount's authentication | |
1460 | * flavor on success; returns -EACCES if server does not support | |
1461 | * the requested flavor. | |
1462 | */ | |
1463 | static int nfs_walk_authlist(struct nfs_parsed_mount_data *args, | |
1464 | struct nfs_mount_request *request) | |
1465 | { | |
1466 | unsigned int i, j, server_authlist_len = *(request->auth_flav_len); | |
1467 | ||
5eecfde6 CL |
1468 | /* |
1469 | * Certain releases of Linux's mountd return an empty | |
1470 | * flavor list. To prevent behavioral regression with | |
1471 | * these servers (ie. rejecting mounts that used to | |
1472 | * succeed), revert to pre-2.6.32 behavior (no checking) | |
1473 | * if the returned flavor list is empty. | |
1474 | */ | |
1475 | if (server_authlist_len == 0) | |
1476 | return 0; | |
1477 | ||
ec88f28d CL |
1478 | /* |
1479 | * We avoid sophisticated negotiating here, as there are | |
1480 | * plenty of cases where we can get it wrong, providing | |
1481 | * either too little or too much security. | |
1482 | * | |
1483 | * RFC 2623, section 2.7 suggests we SHOULD prefer the | |
1484 | * flavor listed first. However, some servers list | |
1485 | * AUTH_NULL first. Our caller plants AUTH_SYS, the | |
1486 | * preferred default, in args->auth_flavors[0] if user | |
1487 | * didn't specify sec= mount option. | |
1488 | */ | |
1489 | for (i = 0; i < args->auth_flavor_len; i++) | |
1490 | for (j = 0; j < server_authlist_len; j++) | |
1491 | if (args->auth_flavors[i] == request->auth_flavs[j]) { | |
1492 | dfprintk(MOUNT, "NFS: using auth flavor %d\n", | |
1493 | request->auth_flavs[j]); | |
1494 | args->auth_flavors[0] = request->auth_flavs[j]; | |
1495 | return 0; | |
1496 | } | |
1497 | ||
1498 | dfprintk(MOUNT, "NFS: server does not support requested auth flavor\n"); | |
1499 | nfs_umount(request); | |
1500 | return -EACCES; | |
1501 | } | |
1502 | ||
0076d7b7 CL |
1503 | /* |
1504 | * Use the remote server's MOUNT service to request the NFS file handle | |
1505 | * corresponding to the provided path. | |
1506 | */ | |
1507 | static int nfs_try_mount(struct nfs_parsed_mount_data *args, | |
1508 | struct nfs_fh *root_fh) | |
1509 | { | |
ec88f28d CL |
1510 | rpc_authflavor_t server_authlist[NFS_MAX_SECFLAVORS]; |
1511 | unsigned int server_authlist_len = ARRAY_SIZE(server_authlist); | |
c5d120f8 CL |
1512 | struct nfs_mount_request request = { |
1513 | .sap = (struct sockaddr *) | |
1514 | &args->mount_server.address, | |
1515 | .dirpath = args->nfs_server.export_path, | |
1516 | .protocol = args->mount_server.protocol, | |
1517 | .fh = root_fh, | |
50a737f8 | 1518 | .noresvport = args->flags & NFS_MOUNT_NORESVPORT, |
ec88f28d CL |
1519 | .auth_flav_len = &server_authlist_len, |
1520 | .auth_flavs = server_authlist, | |
c5d120f8 | 1521 | }; |
4c568017 | 1522 | int status; |
0076d7b7 CL |
1523 | |
1524 | if (args->mount_server.version == 0) { | |
8a6e5deb TM |
1525 | switch (args->version) { |
1526 | default: | |
1527 | args->mount_server.version = NFS_MNT3_VERSION; | |
1528 | break; | |
1529 | case 2: | |
1530 | args->mount_server.version = NFS_MNT_VERSION; | |
1531 | } | |
0076d7b7 | 1532 | } |
c5d120f8 | 1533 | request.version = args->mount_server.version; |
0076d7b7 | 1534 | |
33832034 | 1535 | if (args->mount_server.hostname) |
c5d120f8 | 1536 | request.hostname = args->mount_server.hostname; |
33832034 | 1537 | else |
c5d120f8 | 1538 | request.hostname = args->nfs_server.hostname; |
33832034 | 1539 | |
0076d7b7 CL |
1540 | /* |
1541 | * Construct the mount server's address. | |
1542 | */ | |
4c568017 | 1543 | if (args->mount_server.address.ss_family == AF_UNSPEC) { |
c5d120f8 | 1544 | memcpy(request.sap, &args->nfs_server.address, |
4c568017 CL |
1545 | args->nfs_server.addrlen); |
1546 | args->mount_server.addrlen = args->nfs_server.addrlen; | |
1547 | } | |
c5d120f8 | 1548 | request.salen = args->mount_server.addrlen; |
f5855fec | 1549 | nfs_set_port(request.sap, &args->mount_server.port, 0); |
0076d7b7 CL |
1550 | |
1551 | /* | |
1552 | * Now ask the mount server to map our export path | |
1553 | * to a file handle. | |
1554 | */ | |
c5d120f8 | 1555 | status = nfs_mount(&request); |
ec88f28d CL |
1556 | if (status != 0) { |
1557 | dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n", | |
1558 | request.hostname, status); | |
1559 | return status; | |
1560 | } | |
0076d7b7 | 1561 | |
ec88f28d CL |
1562 | /* |
1563 | * MNTv1 (NFSv2) does not support auth flavor negotiation. | |
1564 | */ | |
1565 | if (args->mount_server.version != NFS_MNT3_VERSION) | |
1566 | return 0; | |
1567 | return nfs_walk_authlist(args, &request); | |
0076d7b7 CL |
1568 | } |
1569 | ||
d1aa0825 CL |
1570 | static int nfs_parse_simple_hostname(const char *dev_name, |
1571 | char **hostname, size_t maxnamlen, | |
1572 | char **export_path, size_t maxpathlen) | |
dc045898 CL |
1573 | { |
1574 | size_t len; | |
1575 | char *colon, *comma; | |
1576 | ||
1577 | colon = strchr(dev_name, ':'); | |
1578 | if (colon == NULL) | |
1579 | goto out_bad_devname; | |
1580 | ||
1581 | len = colon - dev_name; | |
1582 | if (len > maxnamlen) | |
1583 | goto out_hostname; | |
1584 | ||
1585 | /* N.B. caller will free nfs_server.hostname in all cases */ | |
1586 | *hostname = kstrndup(dev_name, len, GFP_KERNEL); | |
1587 | if (!*hostname) | |
1588 | goto out_nomem; | |
1589 | ||
1590 | /* kill possible hostname list: not supported */ | |
1591 | comma = strchr(*hostname, ','); | |
1592 | if (comma != NULL) { | |
1593 | if (comma == *hostname) | |
1594 | goto out_bad_devname; | |
1595 | *comma = '\0'; | |
1596 | } | |
1597 | ||
1598 | colon++; | |
1599 | len = strlen(colon); | |
1600 | if (len > maxpathlen) | |
1601 | goto out_path; | |
1602 | *export_path = kstrndup(colon, len, GFP_KERNEL); | |
1603 | if (!*export_path) | |
1604 | goto out_nomem; | |
1605 | ||
1606 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path); | |
1607 | return 0; | |
1608 | ||
1609 | out_bad_devname: | |
1610 | dfprintk(MOUNT, "NFS: device name not in host:path format\n"); | |
1611 | return -EINVAL; | |
1612 | ||
1613 | out_nomem: | |
1614 | dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); | |
1615 | return -ENOMEM; | |
1616 | ||
1617 | out_hostname: | |
1618 | dfprintk(MOUNT, "NFS: server hostname too long\n"); | |
1619 | return -ENAMETOOLONG; | |
1620 | ||
1621 | out_path: | |
1622 | dfprintk(MOUNT, "NFS: export pathname too long\n"); | |
1623 | return -ENAMETOOLONG; | |
1624 | } | |
1625 | ||
d1aa0825 CL |
1626 | /* |
1627 | * Hostname has square brackets around it because it contains one or | |
1628 | * more colons. We look for the first closing square bracket, and a | |
1629 | * colon must follow it. | |
1630 | */ | |
1631 | static int nfs_parse_protected_hostname(const char *dev_name, | |
1632 | char **hostname, size_t maxnamlen, | |
1633 | char **export_path, size_t maxpathlen) | |
1634 | { | |
1635 | size_t len; | |
1636 | char *start, *end; | |
1637 | ||
1638 | start = (char *)(dev_name + 1); | |
1639 | ||
1640 | end = strchr(start, ']'); | |
1641 | if (end == NULL) | |
1642 | goto out_bad_devname; | |
1643 | if (*(end + 1) != ':') | |
1644 | goto out_bad_devname; | |
1645 | ||
1646 | len = end - start; | |
1647 | if (len > maxnamlen) | |
1648 | goto out_hostname; | |
1649 | ||
1650 | /* N.B. caller will free nfs_server.hostname in all cases */ | |
1651 | *hostname = kstrndup(start, len, GFP_KERNEL); | |
1652 | if (*hostname == NULL) | |
1653 | goto out_nomem; | |
1654 | ||
1655 | end += 2; | |
1656 | len = strlen(end); | |
1657 | if (len > maxpathlen) | |
1658 | goto out_path; | |
1659 | *export_path = kstrndup(end, len, GFP_KERNEL); | |
1660 | if (!*export_path) | |
1661 | goto out_nomem; | |
1662 | ||
1663 | return 0; | |
1664 | ||
1665 | out_bad_devname: | |
1666 | dfprintk(MOUNT, "NFS: device name not in host:path format\n"); | |
1667 | return -EINVAL; | |
1668 | ||
1669 | out_nomem: | |
1670 | dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); | |
1671 | return -ENOMEM; | |
1672 | ||
1673 | out_hostname: | |
1674 | dfprintk(MOUNT, "NFS: server hostname too long\n"); | |
1675 | return -ENAMETOOLONG; | |
1676 | ||
1677 | out_path: | |
1678 | dfprintk(MOUNT, "NFS: export pathname too long\n"); | |
1679 | return -ENAMETOOLONG; | |
1680 | } | |
1681 | ||
1682 | /* | |
1683 | * Split "dev_name" into "hostname:export_path". | |
1684 | * | |
1685 | * The leftmost colon demarks the split between the server's hostname | |
1686 | * and the export path. If the hostname starts with a left square | |
1687 | * bracket, then it may contain colons. | |
1688 | * | |
1689 | * Note: caller frees hostname and export path, even on error. | |
1690 | */ | |
1691 | static int nfs_parse_devname(const char *dev_name, | |
1692 | char **hostname, size_t maxnamlen, | |
1693 | char **export_path, size_t maxpathlen) | |
1694 | { | |
1695 | if (*dev_name == '[') | |
1696 | return nfs_parse_protected_hostname(dev_name, | |
1697 | hostname, maxnamlen, | |
1698 | export_path, maxpathlen); | |
1699 | ||
1700 | return nfs_parse_simple_hostname(dev_name, | |
1701 | hostname, maxnamlen, | |
1702 | export_path, maxpathlen); | |
1703 | } | |
1704 | ||
f7b422b1 | 1705 | /* |
54ceac45 DH |
1706 | * Validate the NFS2/NFS3 mount data |
1707 | * - fills in the mount root filehandle | |
136d558c CL |
1708 | * |
1709 | * For option strings, user space handles the following behaviors: | |
1710 | * | |
1711 | * + DNS: mapping server host name to IP address ("addr=" option) | |
1712 | * | |
1713 | * + failure mode: how to behave if a mount request can't be handled | |
1714 | * immediately ("fg/bg" option) | |
1715 | * | |
1716 | * + retry: how often to retry a mount request ("retry=" option) | |
1717 | * | |
1718 | * + breaking back: trying proto=udp after proto=tcp, v2 after v3, | |
1719 | * mountproto=tcp after mountproto=udp, and so on | |
f7b422b1 | 1720 | */ |
2283f8d6 TT |
1721 | static int nfs_validate_mount_data(void *options, |
1722 | struct nfs_parsed_mount_data *args, | |
136d558c CL |
1723 | struct nfs_fh *mntfh, |
1724 | const char *dev_name) | |
f7b422b1 | 1725 | { |
2283f8d6 | 1726 | struct nfs_mount_data *data = (struct nfs_mount_data *)options; |
4cfd74fc | 1727 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; |
136d558c | 1728 | |
5df36e78 CL |
1729 | if (data == NULL) |
1730 | goto out_no_data; | |
f7b422b1 | 1731 | |
54ceac45 | 1732 | switch (data->version) { |
5df36e78 CL |
1733 | case 1: |
1734 | data->namlen = 0; | |
1735 | case 2: | |
1736 | data->bsize = 0; | |
1737 | case 3: | |
1738 | if (data->flags & NFS_MOUNT_VER3) | |
1739 | goto out_no_v3; | |
1740 | data->root.size = NFS2_FHSIZE; | |
1741 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
1742 | case 4: | |
1743 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1744 | goto out_no_sec; | |
1745 | case 5: | |
1746 | memset(data->context, 0, sizeof(data->context)); | |
1747 | case 6: | |
b7e24457 TM |
1748 | if (data->flags & NFS_MOUNT_VER3) { |
1749 | if (data->root.size > NFS3_FHSIZE || data->root.size == 0) | |
1750 | goto out_invalid_fh; | |
5df36e78 | 1751 | mntfh->size = data->root.size; |
764302cc CL |
1752 | args->version = 3; |
1753 | } else { | |
5df36e78 | 1754 | mntfh->size = NFS2_FHSIZE; |
764302cc CL |
1755 | args->version = 2; |
1756 | } | |
5df36e78 | 1757 | |
5df36e78 CL |
1758 | |
1759 | memcpy(mntfh->data, data->root.data, mntfh->size); | |
1760 | if (mntfh->size < sizeof(mntfh->data)) | |
1761 | memset(mntfh->data + mntfh->size, 0, | |
1762 | sizeof(mntfh->data) - mntfh->size); | |
6e88e061 | 1763 | |
2283f8d6 TT |
1764 | /* |
1765 | * Translate to nfs_parsed_mount_data, which nfs_fill_super | |
1766 | * can deal with. | |
1767 | */ | |
ff3525a5 | 1768 | args->flags = data->flags & NFS_MOUNT_FLAGMASK; |
2283f8d6 TT |
1769 | args->rsize = data->rsize; |
1770 | args->wsize = data->wsize; | |
2283f8d6 TT |
1771 | args->timeo = data->timeo; |
1772 | args->retrans = data->retrans; | |
1773 | args->acregmin = data->acregmin; | |
1774 | args->acregmax = data->acregmax; | |
1775 | args->acdirmin = data->acdirmin; | |
1776 | args->acdirmax = data->acdirmax; | |
4c568017 | 1777 | |
4cfd74fc | 1778 | memcpy(sap, &data->addr, sizeof(data->addr)); |
4c568017 | 1779 | args->nfs_server.addrlen = sizeof(data->addr); |
4cfd74fc | 1780 | if (!nfs_verify_server_address(sap)) |
4c568017 CL |
1781 | goto out_no_address; |
1782 | ||
2283f8d6 | 1783 | if (!(data->flags & NFS_MOUNT_TCP)) |
0896a725 | 1784 | args->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
2283f8d6 TT |
1785 | /* N.B. caller will free nfs_server.hostname in all cases */ |
1786 | args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); | |
1787 | args->namlen = data->namlen; | |
1788 | args->bsize = data->bsize; | |
dd07c947 CL |
1789 | |
1790 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1791 | args->auth_flavors[0] = data->pseudoflavor; | |
63649bd7 CG |
1792 | if (!args->nfs_server.hostname) |
1793 | goto out_nomem; | |
f9c3a380 EP |
1794 | |
1795 | /* | |
1796 | * The legacy version 6 binary mount data from userspace has a | |
1797 | * field used only to transport selinux information into the | |
1798 | * the kernel. To continue to support that functionality we | |
1799 | * have a touch of selinux knowledge here in the NFS code. The | |
1800 | * userspace code converted context=blah to just blah so we are | |
1801 | * converting back to the full string selinux understands. | |
1802 | */ | |
1803 | if (data->context[0]){ | |
1804 | #ifdef CONFIG_SECURITY_SELINUX | |
1805 | int rc; | |
1806 | char *opts_str = kmalloc(sizeof(data->context) + 8, GFP_KERNEL); | |
1807 | if (!opts_str) | |
1808 | return -ENOMEM; | |
1809 | strcpy(opts_str, "context="); | |
1810 | data->context[NFS_MAX_CONTEXT_LEN] = '\0'; | |
1811 | strcat(opts_str, &data->context[0]); | |
1812 | rc = security_sb_parse_opts_str(opts_str, &args->lsm_opts); | |
1813 | kfree(opts_str); | |
1814 | if (rc) | |
1815 | return rc; | |
1816 | #else | |
1817 | return -EINVAL; | |
1818 | #endif | |
1819 | } | |
1820 | ||
5df36e78 | 1821 | break; |
136d558c | 1822 | default: { |
136d558c | 1823 | int status; |
136d558c | 1824 | |
2283f8d6 TT |
1825 | if (nfs_parse_mount_options((char *)options, args) == 0) |
1826 | return -EINVAL; | |
136d558c | 1827 | |
4cfd74fc | 1828 | if (!nfs_verify_server_address(sap)) |
6e88e061 CL |
1829 | goto out_no_address; |
1830 | ||
764302cc CL |
1831 | if (args->version == 4) |
1832 | #ifdef CONFIG_NFS_V4 | |
1833 | return nfs4_validate_text_mount_data(options, | |
1834 | args, dev_name); | |
1835 | #else | |
1836 | goto out_v4_not_compiled; | |
1837 | #endif | |
1838 | ||
f5855fec | 1839 | nfs_set_port(sap, &args->nfs_server.port, 0); |
ed596a8a | 1840 | |
259875ef TM |
1841 | nfs_set_mount_transport_protocol(args); |
1842 | ||
dc045898 CL |
1843 | status = nfs_parse_devname(dev_name, |
1844 | &args->nfs_server.hostname, | |
1845 | PAGE_SIZE, | |
1846 | &args->nfs_server.export_path, | |
1847 | NFS_MAXPATHLEN); | |
1848 | if (!status) | |
1849 | status = nfs_try_mount(args, mntfh); | |
136d558c | 1850 | |
dc045898 CL |
1851 | kfree(args->nfs_server.export_path); |
1852 | args->nfs_server.export_path = NULL; | |
136d558c | 1853 | |
136d558c | 1854 | if (status) |
fdc6e2c8 | 1855 | return status; |
136d558c | 1856 | |
136d558c CL |
1857 | break; |
1858 | } | |
f7b422b1 | 1859 | } |
54ceac45 DH |
1860 | |
1861 | #ifndef CONFIG_NFS_V3 | |
8a6e5deb | 1862 | if (args->version == 3) |
5df36e78 CL |
1863 | goto out_v3_not_compiled; |
1864 | #endif /* !CONFIG_NFS_V3 */ | |
f7b422b1 | 1865 | |
5df36e78 | 1866 | return 0; |
f7b422b1 | 1867 | |
5df36e78 CL |
1868 | out_no_data: |
1869 | dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); | |
1870 | return -EINVAL; | |
54ceac45 | 1871 | |
5df36e78 CL |
1872 | out_no_v3: |
1873 | dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", | |
1874 | data->version); | |
1875 | return -EINVAL; | |
f7b422b1 | 1876 | |
5df36e78 CL |
1877 | out_no_sec: |
1878 | dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); | |
1879 | return -EINVAL; | |
1880 | ||
5df36e78 CL |
1881 | #ifndef CONFIG_NFS_V3 |
1882 | out_v3_not_compiled: | |
1883 | dfprintk(MOUNT, "NFS: NFSv3 is not compiled into kernel\n"); | |
1884 | return -EPROTONOSUPPORT; | |
1885 | #endif /* !CONFIG_NFS_V3 */ | |
1886 | ||
764302cc CL |
1887 | #ifndef CONFIG_NFS_V4 |
1888 | out_v4_not_compiled: | |
1889 | dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); | |
1890 | return -EPROTONOSUPPORT; | |
1891 | #endif /* !CONFIG_NFS_V4 */ | |
1892 | ||
63649bd7 CG |
1893 | out_nomem: |
1894 | dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); | |
1895 | return -ENOMEM; | |
1896 | ||
5df36e78 CL |
1897 | out_no_address: |
1898 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); | |
1899 | return -EINVAL; | |
1900 | ||
1901 | out_invalid_fh: | |
1902 | dfprintk(MOUNT, "NFS: invalid root filehandle\n"); | |
1903 | return -EINVAL; | |
f7b422b1 DH |
1904 | } |
1905 | ||
48b605f8 JL |
1906 | static int |
1907 | nfs_compare_remount_data(struct nfs_server *nfss, | |
1908 | struct nfs_parsed_mount_data *data) | |
1909 | { | |
1910 | if (data->flags != nfss->flags || | |
1911 | data->rsize != nfss->rsize || | |
1912 | data->wsize != nfss->wsize || | |
1913 | data->retrans != nfss->client->cl_timeout->to_retries || | |
1914 | data->auth_flavors[0] != nfss->client->cl_auth->au_flavor || | |
1915 | data->acregmin != nfss->acregmin / HZ || | |
1916 | data->acregmax != nfss->acregmax / HZ || | |
1917 | data->acdirmin != nfss->acdirmin / HZ || | |
1918 | data->acdirmax != nfss->acdirmax / HZ || | |
1919 | data->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) || | |
bcd2ea17 | 1920 | data->nfs_server.port != nfss->port || |
48b605f8 | 1921 | data->nfs_server.addrlen != nfss->nfs_client->cl_addrlen || |
a1be9eee SR |
1922 | !rpc_cmp_addr((struct sockaddr *)&data->nfs_server.address, |
1923 | (struct sockaddr *)&nfss->nfs_client->cl_addr)) | |
48b605f8 JL |
1924 | return -EINVAL; |
1925 | ||
1926 | return 0; | |
1927 | } | |
1928 | ||
1929 | static int | |
1930 | nfs_remount(struct super_block *sb, int *flags, char *raw_data) | |
1931 | { | |
1932 | int error; | |
1933 | struct nfs_server *nfss = sb->s_fs_info; | |
1934 | struct nfs_parsed_mount_data *data; | |
1935 | struct nfs_mount_data *options = (struct nfs_mount_data *)raw_data; | |
1936 | struct nfs4_mount_data *options4 = (struct nfs4_mount_data *)raw_data; | |
cd100725 | 1937 | u32 nfsvers = nfss->nfs_client->rpc_ops->version; |
48b605f8 JL |
1938 | |
1939 | /* | |
1940 | * Userspace mount programs that send binary options generally send | |
1941 | * them populated with default values. We have no way to know which | |
1942 | * ones were explicitly specified. Fall back to legacy behavior and | |
1943 | * just return success. | |
1944 | */ | |
31c94469 MZ |
1945 | if ((nfsvers == 4 && (!options4 || options4->version == 1)) || |
1946 | (nfsvers <= 3 && (!options || (options->version >= 1 && | |
1947 | options->version <= 6)))) | |
48b605f8 JL |
1948 | return 0; |
1949 | ||
1950 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
1951 | if (data == NULL) | |
1952 | return -ENOMEM; | |
1953 | ||
1954 | /* fill out struct with values from existing mount */ | |
1955 | data->flags = nfss->flags; | |
1956 | data->rsize = nfss->rsize; | |
1957 | data->wsize = nfss->wsize; | |
1958 | data->retrans = nfss->client->cl_timeout->to_retries; | |
1959 | data->auth_flavors[0] = nfss->client->cl_auth->au_flavor; | |
1960 | data->acregmin = nfss->acregmin / HZ; | |
1961 | data->acregmax = nfss->acregmax / HZ; | |
1962 | data->acdirmin = nfss->acdirmin / HZ; | |
1963 | data->acdirmax = nfss->acdirmax / HZ; | |
1964 | data->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; | |
bcd2ea17 | 1965 | data->nfs_server.port = nfss->port; |
48b605f8 JL |
1966 | data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; |
1967 | memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr, | |
1968 | data->nfs_server.addrlen); | |
1969 | ||
1970 | /* overwrite those values with any that were specified */ | |
1971 | error = nfs_parse_mount_options((char *)options, data); | |
1972 | if (error < 0) | |
1973 | goto out; | |
1974 | ||
1975 | /* compare new mount options with old ones */ | |
1976 | error = nfs_compare_remount_data(nfss, data); | |
1977 | out: | |
1978 | kfree(data); | |
1979 | return error; | |
1980 | } | |
1981 | ||
f7b422b1 | 1982 | /* |
54ceac45 | 1983 | * Initialise the common bits of the superblock |
f7b422b1 | 1984 | */ |
54ceac45 | 1985 | static inline void nfs_initialise_sb(struct super_block *sb) |
f7b422b1 | 1986 | { |
54ceac45 | 1987 | struct nfs_server *server = NFS_SB(sb); |
5006a76c | 1988 | |
54ceac45 | 1989 | sb->s_magic = NFS_SUPER_MAGIC; |
f7b422b1 | 1990 | |
54ceac45 DH |
1991 | /* We probably want something more informative here */ |
1992 | snprintf(sb->s_id, sizeof(sb->s_id), | |
1993 | "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev)); | |
5006a76c | 1994 | |
54ceac45 DH |
1995 | if (sb->s_blocksize == 0) |
1996 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
1997 | &sb->s_blocksize_bits); | |
f7b422b1 | 1998 | |
54ceac45 DH |
1999 | if (server->flags & NFS_MOUNT_NOAC) |
2000 | sb->s_flags |= MS_SYNCHRONOUS; | |
f7b422b1 | 2001 | |
32a88aa1 JA |
2002 | sb->s_bdi = &server->backing_dev_info; |
2003 | ||
54ceac45 | 2004 | nfs_super_set_maxbytes(sb, server->maxfilesize); |
f7b422b1 DH |
2005 | } |
2006 | ||
2007 | /* | |
54ceac45 | 2008 | * Finish setting up an NFS2/3 superblock |
f7b422b1 | 2009 | */ |
2283f8d6 TT |
2010 | static void nfs_fill_super(struct super_block *sb, |
2011 | struct nfs_parsed_mount_data *data) | |
f7b422b1 DH |
2012 | { |
2013 | struct nfs_server *server = NFS_SB(sb); | |
5006a76c | 2014 | |
54ceac45 DH |
2015 | sb->s_blocksize_bits = 0; |
2016 | sb->s_blocksize = 0; | |
2017 | if (data->bsize) | |
2018 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); | |
f7b422b1 | 2019 | |
8a6e5deb | 2020 | if (server->nfs_client->rpc_ops->version == 3) { |
54ceac45 DH |
2021 | /* The VFS shouldn't apply the umask to mode bits. We will do |
2022 | * so ourselves when necessary. | |
2023 | */ | |
2024 | sb->s_flags |= MS_POSIXACL; | |
2025 | sb->s_time_gran = 1; | |
816724e6 | 2026 | } |
54ceac45 DH |
2027 | |
2028 | sb->s_op = &nfs_sops; | |
2029 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
2030 | } |
2031 | ||
2032 | /* | |
54ceac45 | 2033 | * Finish setting up a cloned NFS2/3 superblock |
f7b422b1 | 2034 | */ |
54ceac45 DH |
2035 | static void nfs_clone_super(struct super_block *sb, |
2036 | const struct super_block *old_sb) | |
f7b422b1 | 2037 | { |
54ceac45 DH |
2038 | struct nfs_server *server = NFS_SB(sb); |
2039 | ||
2040 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; | |
2041 | sb->s_blocksize = old_sb->s_blocksize; | |
2042 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 2043 | |
8a6e5deb | 2044 | if (server->nfs_client->rpc_ops->version == 3) { |
54ceac45 DH |
2045 | /* The VFS shouldn't apply the umask to mode bits. We will do |
2046 | * so ourselves when necessary. | |
f7b422b1 DH |
2047 | */ |
2048 | sb->s_flags |= MS_POSIXACL; | |
f7b422b1 | 2049 | sb->s_time_gran = 1; |
f7b422b1 DH |
2050 | } |
2051 | ||
54ceac45 DH |
2052 | sb->s_op = old_sb->s_op; |
2053 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
2054 | } |
2055 | ||
275a5d24 TM |
2056 | static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags) |
2057 | { | |
2058 | const struct nfs_server *a = s->s_fs_info; | |
2059 | const struct rpc_clnt *clnt_a = a->client; | |
2060 | const struct rpc_clnt *clnt_b = b->client; | |
2061 | ||
2062 | if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK)) | |
2063 | goto Ebusy; | |
2064 | if (a->nfs_client != b->nfs_client) | |
2065 | goto Ebusy; | |
2066 | if (a->flags != b->flags) | |
2067 | goto Ebusy; | |
2068 | if (a->wsize != b->wsize) | |
2069 | goto Ebusy; | |
2070 | if (a->rsize != b->rsize) | |
2071 | goto Ebusy; | |
2072 | if (a->acregmin != b->acregmin) | |
2073 | goto Ebusy; | |
2074 | if (a->acregmax != b->acregmax) | |
2075 | goto Ebusy; | |
2076 | if (a->acdirmin != b->acdirmin) | |
2077 | goto Ebusy; | |
2078 | if (a->acdirmax != b->acdirmax) | |
2079 | goto Ebusy; | |
2080 | if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) | |
2081 | goto Ebusy; | |
e89a5a43 | 2082 | return 1; |
275a5d24 | 2083 | Ebusy: |
e89a5a43 TM |
2084 | return 0; |
2085 | } | |
2086 | ||
2087 | struct nfs_sb_mountdata { | |
2088 | struct nfs_server *server; | |
2089 | int mntflags; | |
2090 | }; | |
2091 | ||
2092 | static int nfs_set_super(struct super_block *s, void *data) | |
2093 | { | |
2094 | struct nfs_sb_mountdata *sb_mntdata = data; | |
2095 | struct nfs_server *server = sb_mntdata->server; | |
2096 | int ret; | |
2097 | ||
2098 | s->s_flags = sb_mntdata->mntflags; | |
2099 | s->s_fs_info = server; | |
2100 | ret = set_anon_super(s, server); | |
2101 | if (ret == 0) | |
2102 | server->s_dev = s->s_dev; | |
2103 | return ret; | |
2104 | } | |
2105 | ||
fd00a8ff CL |
2106 | static int nfs_compare_super_address(struct nfs_server *server1, |
2107 | struct nfs_server *server2) | |
2108 | { | |
2109 | struct sockaddr *sap1, *sap2; | |
2110 | ||
2111 | sap1 = (struct sockaddr *)&server1->nfs_client->cl_addr; | |
2112 | sap2 = (struct sockaddr *)&server2->nfs_client->cl_addr; | |
2113 | ||
2114 | if (sap1->sa_family != sap2->sa_family) | |
2115 | return 0; | |
2116 | ||
2117 | switch (sap1->sa_family) { | |
2118 | case AF_INET: { | |
2119 | struct sockaddr_in *sin1 = (struct sockaddr_in *)sap1; | |
2120 | struct sockaddr_in *sin2 = (struct sockaddr_in *)sap2; | |
2121 | if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) | |
2122 | return 0; | |
2123 | if (sin1->sin_port != sin2->sin_port) | |
2124 | return 0; | |
2125 | break; | |
2126 | } | |
2127 | case AF_INET6: { | |
2128 | struct sockaddr_in6 *sin1 = (struct sockaddr_in6 *)sap1; | |
2129 | struct sockaddr_in6 *sin2 = (struct sockaddr_in6 *)sap2; | |
2130 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) | |
2131 | return 0; | |
2132 | if (sin1->sin6_port != sin2->sin6_port) | |
2133 | return 0; | |
2134 | break; | |
2135 | } | |
2136 | default: | |
2137 | return 0; | |
2138 | } | |
2139 | ||
2140 | return 1; | |
2141 | } | |
2142 | ||
e89a5a43 TM |
2143 | static int nfs_compare_super(struct super_block *sb, void *data) |
2144 | { | |
2145 | struct nfs_sb_mountdata *sb_mntdata = data; | |
2146 | struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb); | |
2147 | int mntflags = sb_mntdata->mntflags; | |
2148 | ||
fd00a8ff | 2149 | if (!nfs_compare_super_address(old, server)) |
e89a5a43 TM |
2150 | return 0; |
2151 | /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */ | |
2152 | if (old->flags & NFS_MOUNT_UNSHARED) | |
2153 | return 0; | |
2154 | if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0) | |
2155 | return 0; | |
2156 | return nfs_compare_mount_options(sb, server, mntflags); | |
275a5d24 TM |
2157 | } |
2158 | ||
fa799759 MS |
2159 | static int nfs_bdi_register(struct nfs_server *server) |
2160 | { | |
2161 | return bdi_register_dev(&server->backing_dev_info, server->s_dev); | |
2162 | } | |
2163 | ||
816724e6 TM |
2164 | static int nfs_get_sb(struct file_system_type *fs_type, |
2165 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
f7b422b1 | 2166 | { |
f7b422b1 DH |
2167 | struct nfs_server *server = NULL; |
2168 | struct super_block *s; | |
33852a1f TM |
2169 | struct nfs_parsed_mount_data *data; |
2170 | struct nfs_fh *mntfh; | |
54ceac45 | 2171 | struct dentry *mntroot; |
75180df2 | 2172 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2173 | struct nfs_sb_mountdata sb_mntdata = { |
2174 | .mntflags = flags, | |
2175 | }; | |
33852a1f TM |
2176 | int error = -ENOMEM; |
2177 | ||
c5811dbd | 2178 | data = nfs_alloc_parsed_mount_data(3); |
b157b06c | 2179 | mntfh = nfs_alloc_fhandle(); |
33852a1f TM |
2180 | if (data == NULL || mntfh == NULL) |
2181 | goto out_free_fh; | |
f7b422b1 | 2182 | |
33852a1f | 2183 | security_init_mnt_opts(&data->lsm_opts); |
f9c3a380 | 2184 | |
54ceac45 | 2185 | /* Validate the mount data */ |
33852a1f | 2186 | error = nfs_validate_mount_data(raw_data, data, mntfh, dev_name); |
54ceac45 | 2187 | if (error < 0) |
0655960f | 2188 | goto out; |
f7b422b1 | 2189 | |
764302cc CL |
2190 | #ifdef CONFIG_NFS_V4 |
2191 | if (data->version == 4) { | |
2192 | error = nfs4_try_mount(flags, dev_name, data, mnt); | |
2193 | kfree(data->client_address); | |
9699eda6 | 2194 | kfree(data->nfs_server.export_path); |
764302cc CL |
2195 | goto out; |
2196 | } | |
2197 | #endif /* CONFIG_NFS_V4 */ | |
2198 | ||
54ceac45 | 2199 | /* Get a volume representation */ |
33852a1f | 2200 | server = nfs_create_server(data, mntfh); |
54ceac45 DH |
2201 | if (IS_ERR(server)) { |
2202 | error = PTR_ERR(server); | |
0655960f | 2203 | goto out; |
f7b422b1 | 2204 | } |
e89a5a43 | 2205 | sb_mntdata.server = server; |
f7b422b1 | 2206 | |
75180df2 TM |
2207 | if (server->flags & NFS_MOUNT_UNSHARED) |
2208 | compare_super = NULL; | |
2209 | ||
54ceac45 | 2210 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 2211 | s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
2212 | if (IS_ERR(s)) { |
2213 | error = PTR_ERR(s); | |
54ceac45 | 2214 | goto out_err_nosb; |
816724e6 TM |
2215 | } |
2216 | ||
54ceac45 DH |
2217 | if (s->s_fs_info != server) { |
2218 | nfs_free_server(server); | |
2219 | server = NULL; | |
fa799759 MS |
2220 | } else { |
2221 | error = nfs_bdi_register(server); | |
2222 | if (error) | |
cfbc0683 | 2223 | goto error_splat_bdi; |
54ceac45 | 2224 | } |
f7b422b1 | 2225 | |
54ceac45 DH |
2226 | if (!s->s_root) { |
2227 | /* initial superblock/root creation */ | |
33852a1f | 2228 | nfs_fill_super(s, data); |
2df54806 DH |
2229 | nfs_fscache_get_super_cookie( |
2230 | s, data ? data->fscache_uniq : NULL, NULL); | |
54ceac45 | 2231 | } |
f7b422b1 | 2232 | |
33852a1f | 2233 | mntroot = nfs_get_root(s, mntfh); |
54ceac45 DH |
2234 | if (IS_ERR(mntroot)) { |
2235 | error = PTR_ERR(mntroot); | |
2236 | goto error_splat_super; | |
f7b422b1 | 2237 | } |
816724e6 | 2238 | |
33852a1f | 2239 | error = security_sb_set_mnt_opts(s, &data->lsm_opts); |
f9c3a380 EP |
2240 | if (error) |
2241 | goto error_splat_root; | |
2242 | ||
54ceac45 DH |
2243 | s->s_flags |= MS_ACTIVE; |
2244 | mnt->mnt_sb = s; | |
2245 | mnt->mnt_root = mntroot; | |
0655960f CL |
2246 | error = 0; |
2247 | ||
2248 | out: | |
33852a1f TM |
2249 | kfree(data->nfs_server.hostname); |
2250 | kfree(data->mount_server.hostname); | |
08734048 | 2251 | kfree(data->fscache_uniq); |
33852a1f TM |
2252 | security_free_mnt_opts(&data->lsm_opts); |
2253 | out_free_fh: | |
b157b06c | 2254 | nfs_free_fhandle(mntfh); |
33852a1f | 2255 | kfree(data); |
0655960f | 2256 | return error; |
816724e6 | 2257 | |
54ceac45 DH |
2258 | out_err_nosb: |
2259 | nfs_free_server(server); | |
0655960f | 2260 | goto out; |
54ceac45 | 2261 | |
f9c3a380 EP |
2262 | error_splat_root: |
2263 | dput(mntroot); | |
54ceac45 | 2264 | error_splat_super: |
cfbc0683 N |
2265 | if (server && !s->s_root) |
2266 | bdi_unregister(&server->backing_dev_info); | |
2267 | error_splat_bdi: | |
6f5bbff9 | 2268 | deactivate_locked_super(s); |
0655960f | 2269 | goto out; |
f7b422b1 DH |
2270 | } |
2271 | ||
387c149b TM |
2272 | /* |
2273 | * Ensure that we unregister the bdi before kill_anon_super | |
2274 | * releases the device name | |
2275 | */ | |
2276 | static void nfs_put_super(struct super_block *s) | |
2277 | { | |
2278 | struct nfs_server *server = NFS_SB(s); | |
2279 | ||
2280 | bdi_unregister(&server->backing_dev_info); | |
2281 | } | |
2282 | ||
54ceac45 DH |
2283 | /* |
2284 | * Destroy an NFS2/3 superblock | |
2285 | */ | |
f7b422b1 DH |
2286 | static void nfs_kill_super(struct super_block *s) |
2287 | { | |
2288 | struct nfs_server *server = NFS_SB(s); | |
2289 | ||
2290 | kill_anon_super(s); | |
08734048 | 2291 | nfs_fscache_release_super_cookie(s); |
54ceac45 | 2292 | nfs_free_server(server); |
f7b422b1 DH |
2293 | } |
2294 | ||
54ceac45 DH |
2295 | /* |
2296 | * Clone an NFS2/3 server record on xdev traversal (FSID-change) | |
2297 | */ | |
2298 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags, | |
2299 | const char *dev_name, void *raw_data, | |
2300 | struct vfsmount *mnt) | |
f7b422b1 DH |
2301 | { |
2302 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
2303 | struct super_block *s; |
2304 | struct nfs_server *server; | |
2305 | struct dentry *mntroot; | |
75180df2 | 2306 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2307 | struct nfs_sb_mountdata sb_mntdata = { |
2308 | .mntflags = flags, | |
2309 | }; | |
54ceac45 | 2310 | int error; |
f7b422b1 | 2311 | |
54ceac45 | 2312 | dprintk("--> nfs_xdev_get_sb()\n"); |
f7b422b1 | 2313 | |
54ceac45 DH |
2314 | /* create a new volume representation */ |
2315 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
2316 | if (IS_ERR(server)) { | |
2317 | error = PTR_ERR(server); | |
2318 | goto out_err_noserver; | |
2319 | } | |
e89a5a43 | 2320 | sb_mntdata.server = server; |
8fa5c000 | 2321 | |
75180df2 TM |
2322 | if (server->flags & NFS_MOUNT_UNSHARED) |
2323 | compare_super = NULL; | |
2324 | ||
54ceac45 | 2325 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 2326 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2327 | if (IS_ERR(s)) { |
2328 | error = PTR_ERR(s); | |
2329 | goto out_err_nosb; | |
2330 | } | |
5006a76c | 2331 | |
54ceac45 DH |
2332 | if (s->s_fs_info != server) { |
2333 | nfs_free_server(server); | |
2334 | server = NULL; | |
fa799759 MS |
2335 | } else { |
2336 | error = nfs_bdi_register(server); | |
2337 | if (error) | |
cfbc0683 | 2338 | goto error_splat_bdi; |
f7b422b1 | 2339 | } |
24c8dbbb | 2340 | |
54ceac45 DH |
2341 | if (!s->s_root) { |
2342 | /* initial superblock/root creation */ | |
54ceac45 | 2343 | nfs_clone_super(s, data->sb); |
2df54806 | 2344 | nfs_fscache_get_super_cookie(s, NULL, data); |
54ceac45 | 2345 | } |
f7b422b1 | 2346 | |
54ceac45 DH |
2347 | mntroot = nfs_get_root(s, data->fh); |
2348 | if (IS_ERR(mntroot)) { | |
2349 | error = PTR_ERR(mntroot); | |
2350 | goto error_splat_super; | |
f7b422b1 | 2351 | } |
e9cc6c23 | 2352 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
4c1fe2f7 NB |
2353 | dput(mntroot); |
2354 | error = -ESTALE; | |
2355 | goto error_splat_super; | |
2356 | } | |
f7b422b1 | 2357 | |
54ceac45 DH |
2358 | s->s_flags |= MS_ACTIVE; |
2359 | mnt->mnt_sb = s; | |
2360 | mnt->mnt_root = mntroot; | |
f7b422b1 | 2361 | |
f9c3a380 EP |
2362 | /* clone any lsm security options from the parent to the new sb */ |
2363 | security_sb_clone_mnt_opts(data->sb, s); | |
2364 | ||
54ceac45 DH |
2365 | dprintk("<-- nfs_xdev_get_sb() = 0\n"); |
2366 | return 0; | |
24c8dbbb | 2367 | |
54ceac45 DH |
2368 | out_err_nosb: |
2369 | nfs_free_server(server); | |
2370 | out_err_noserver: | |
2371 | dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error); | |
2372 | return error; | |
f7b422b1 | 2373 | |
54ceac45 | 2374 | error_splat_super: |
cfbc0683 N |
2375 | if (server && !s->s_root) |
2376 | bdi_unregister(&server->backing_dev_info); | |
2377 | error_splat_bdi: | |
6f5bbff9 | 2378 | deactivate_locked_super(s); |
54ceac45 DH |
2379 | dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error); |
2380 | return error; | |
f7b422b1 DH |
2381 | } |
2382 | ||
54ceac45 DH |
2383 | #ifdef CONFIG_NFS_V4 |
2384 | ||
f7b422b1 | 2385 | /* |
54ceac45 | 2386 | * Finish setting up a cloned NFS4 superblock |
f7b422b1 | 2387 | */ |
54ceac45 DH |
2388 | static void nfs4_clone_super(struct super_block *sb, |
2389 | const struct super_block *old_sb) | |
f7b422b1 | 2390 | { |
54ceac45 DH |
2391 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; |
2392 | sb->s_blocksize = old_sb->s_blocksize; | |
2393 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 2394 | sb->s_time_gran = 1; |
54ceac45 DH |
2395 | sb->s_op = old_sb->s_op; |
2396 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
2397 | } |
2398 | ||
54ceac45 DH |
2399 | /* |
2400 | * Set up an NFS4 superblock | |
2401 | */ | |
2402 | static void nfs4_fill_super(struct super_block *sb) | |
f7b422b1 | 2403 | { |
54ceac45 DH |
2404 | sb->s_time_gran = 1; |
2405 | sb->s_op = &nfs4_sops; | |
2406 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
2407 | } |
2408 | ||
01c3f052 TM |
2409 | static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) |
2410 | { | |
2411 | args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3); | |
2412 | } | |
2413 | ||
7630c852 CL |
2414 | static int nfs4_validate_text_mount_data(void *options, |
2415 | struct nfs_parsed_mount_data *args, | |
2416 | const char *dev_name) | |
2417 | { | |
2418 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; | |
2419 | ||
f5855fec | 2420 | nfs_set_port(sap, &args->nfs_server.port, NFS_PORT); |
7630c852 CL |
2421 | |
2422 | nfs_validate_transport_protocol(args); | |
2423 | ||
2424 | nfs4_validate_mount_flags(args); | |
2425 | ||
2ecda72b TM |
2426 | if (args->version != 4) { |
2427 | dfprintk(MOUNT, | |
2428 | "NFS4: Illegal mount version\n"); | |
2429 | return -EINVAL; | |
2430 | } | |
2431 | ||
7630c852 CL |
2432 | if (args->auth_flavor_len > 1) { |
2433 | dfprintk(MOUNT, | |
2434 | "NFS4: Too many RPC auth flavours specified\n"); | |
2435 | return -EINVAL; | |
2436 | } | |
2437 | ||
2438 | if (args->client_address == NULL) { | |
2439 | dfprintk(MOUNT, | |
2440 | "NFS4: mount program didn't pass callback address\n"); | |
2441 | return -EINVAL; | |
2442 | } | |
2443 | ||
2444 | return nfs_parse_devname(dev_name, | |
2445 | &args->nfs_server.hostname, | |
2446 | NFS4_MAXNAMLEN, | |
2447 | &args->nfs_server.export_path, | |
2448 | NFS4_MAXPATHLEN); | |
2449 | } | |
2450 | ||
f0768ebd CL |
2451 | /* |
2452 | * Validate NFSv4 mount options | |
2453 | */ | |
91ea40b9 TT |
2454 | static int nfs4_validate_mount_data(void *options, |
2455 | struct nfs_parsed_mount_data *args, | |
2456 | const char *dev_name) | |
f0768ebd | 2457 | { |
4cfd74fc | 2458 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; |
91ea40b9 | 2459 | struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; |
f0768ebd CL |
2460 | char *c; |
2461 | ||
2462 | if (data == NULL) | |
2463 | goto out_no_data; | |
2464 | ||
2465 | switch (data->version) { | |
2466 | case 1: | |
4c568017 CL |
2467 | if (data->host_addrlen > sizeof(args->nfs_server.address)) |
2468 | goto out_no_address; | |
2469 | if (data->host_addrlen == 0) | |
f0768ebd | 2470 | goto out_no_address; |
4c568017 | 2471 | args->nfs_server.addrlen = data->host_addrlen; |
4cfd74fc | 2472 | if (copy_from_user(sap, data->host_addr, data->host_addrlen)) |
f0768ebd | 2473 | return -EFAULT; |
4cfd74fc | 2474 | if (!nfs_verify_server_address(sap)) |
f0768ebd CL |
2475 | goto out_no_address; |
2476 | ||
6738b251 CL |
2477 | if (data->auth_flavourlen) { |
2478 | if (data->auth_flavourlen > 1) | |
2479 | goto out_inval_auth; | |
20c71f5e | 2480 | if (copy_from_user(&args->auth_flavors[0], |
91ea40b9 | 2481 | data->auth_flavours, |
20c71f5e | 2482 | sizeof(args->auth_flavors[0]))) |
f0768ebd | 2483 | return -EFAULT; |
f0768ebd CL |
2484 | } |
2485 | ||
2486 | c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); | |
2487 | if (IS_ERR(c)) | |
2488 | return PTR_ERR(c); | |
91ea40b9 | 2489 | args->nfs_server.hostname = c; |
f0768ebd CL |
2490 | |
2491 | c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); | |
2492 | if (IS_ERR(c)) | |
2493 | return PTR_ERR(c); | |
91ea40b9 TT |
2494 | args->nfs_server.export_path = c; |
2495 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); | |
f0768ebd CL |
2496 | |
2497 | c = strndup_user(data->client_addr.data, 16); | |
2498 | if (IS_ERR(c)) | |
2499 | return PTR_ERR(c); | |
91ea40b9 TT |
2500 | args->client_address = c; |
2501 | ||
2502 | /* | |
2503 | * Translate to nfs_parsed_mount_data, which nfs4_fill_super | |
2504 | * can deal with. | |
2505 | */ | |
2506 | ||
2507 | args->flags = data->flags & NFS4_MOUNT_FLAGMASK; | |
2508 | args->rsize = data->rsize; | |
2509 | args->wsize = data->wsize; | |
2510 | args->timeo = data->timeo; | |
2511 | args->retrans = data->retrans; | |
2512 | args->acregmin = data->acregmin; | |
2513 | args->acregmax = data->acregmax; | |
2514 | args->acdirmin = data->acdirmin; | |
2515 | args->acdirmax = data->acdirmax; | |
2516 | args->nfs_server.protocol = data->proto; | |
259875ef | 2517 | nfs_validate_transport_protocol(args); |
f0768ebd CL |
2518 | |
2519 | break; | |
7630c852 | 2520 | default: |
91ea40b9 | 2521 | if (nfs_parse_mount_options((char *)options, args) == 0) |
80071225 CL |
2522 | return -EINVAL; |
2523 | ||
4cfd74fc | 2524 | if (!nfs_verify_server_address(sap)) |
80071225 | 2525 | return -EINVAL; |
dc045898 | 2526 | |
7630c852 | 2527 | return nfs4_validate_text_mount_data(options, args, dev_name); |
f0768ebd CL |
2528 | } |
2529 | ||
2530 | return 0; | |
2531 | ||
2532 | out_no_data: | |
2533 | dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); | |
2534 | return -EINVAL; | |
2535 | ||
2536 | out_inval_auth: | |
2537 | dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", | |
2538 | data->auth_flavourlen); | |
2539 | return -EINVAL; | |
2540 | ||
2541 | out_no_address: | |
2542 | dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); | |
2543 | return -EINVAL; | |
f0768ebd CL |
2544 | } |
2545 | ||
54ceac45 | 2546 | /* |
c02d7adf | 2547 | * Get the superblock for the NFS4 root partition |
54ceac45 | 2548 | */ |
c02d7adf | 2549 | static int nfs4_remote_get_sb(struct file_system_type *fs_type, |
816724e6 | 2550 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) |
f7b422b1 | 2551 | { |
c02d7adf | 2552 | struct nfs_parsed_mount_data *data = raw_data; |
54ceac45 DH |
2553 | struct super_block *s; |
2554 | struct nfs_server *server; | |
33852a1f | 2555 | struct nfs_fh *mntfh; |
54ceac45 | 2556 | struct dentry *mntroot; |
75180df2 | 2557 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2558 | struct nfs_sb_mountdata sb_mntdata = { |
2559 | .mntflags = flags, | |
2560 | }; | |
33852a1f TM |
2561 | int error = -ENOMEM; |
2562 | ||
b157b06c | 2563 | mntfh = nfs_alloc_fhandle(); |
33852a1f TM |
2564 | if (data == NULL || mntfh == NULL) |
2565 | goto out_free_fh; | |
f7b422b1 | 2566 | |
33852a1f | 2567 | security_init_mnt_opts(&data->lsm_opts); |
f9c3a380 | 2568 | |
54ceac45 | 2569 | /* Get a volume representation */ |
33852a1f | 2570 | server = nfs4_create_server(data, mntfh); |
54ceac45 DH |
2571 | if (IS_ERR(server)) { |
2572 | error = PTR_ERR(server); | |
29eb981a | 2573 | goto out; |
f7b422b1 | 2574 | } |
e89a5a43 | 2575 | sb_mntdata.server = server; |
f7b422b1 | 2576 | |
75180df2 TM |
2577 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2578 | compare_super = NULL; | |
2579 | ||
54ceac45 | 2580 | /* Get a superblock - note that we may end up sharing one that already exists */ |
c02d7adf | 2581 | s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
2582 | if (IS_ERR(s)) { |
2583 | error = PTR_ERR(s); | |
f7b422b1 | 2584 | goto out_free; |
816724e6 TM |
2585 | } |
2586 | ||
5dd3177a TM |
2587 | if (s->s_fs_info != server) { |
2588 | nfs_free_server(server); | |
2589 | server = NULL; | |
fa799759 MS |
2590 | } else { |
2591 | error = nfs_bdi_register(server); | |
2592 | if (error) | |
cfbc0683 | 2593 | goto error_splat_bdi; |
5dd3177a TM |
2594 | } |
2595 | ||
54ceac45 DH |
2596 | if (!s->s_root) { |
2597 | /* initial superblock/root creation */ | |
54ceac45 | 2598 | nfs4_fill_super(s); |
2df54806 DH |
2599 | nfs_fscache_get_super_cookie( |
2600 | s, data ? data->fscache_uniq : NULL, NULL); | |
54ceac45 | 2601 | } |
f7b422b1 | 2602 | |
33852a1f | 2603 | mntroot = nfs4_get_root(s, mntfh); |
54ceac45 DH |
2604 | if (IS_ERR(mntroot)) { |
2605 | error = PTR_ERR(mntroot); | |
2606 | goto error_splat_super; | |
f7b422b1 | 2607 | } |
54ceac45 | 2608 | |
33852a1f | 2609 | error = security_sb_set_mnt_opts(s, &data->lsm_opts); |
46c8ac74 EP |
2610 | if (error) |
2611 | goto error_splat_root; | |
2612 | ||
f7b422b1 | 2613 | s->s_flags |= MS_ACTIVE; |
54ceac45 DH |
2614 | mnt->mnt_sb = s; |
2615 | mnt->mnt_root = mntroot; | |
29eb981a CL |
2616 | error = 0; |
2617 | ||
2618 | out: | |
33852a1f TM |
2619 | security_free_mnt_opts(&data->lsm_opts); |
2620 | out_free_fh: | |
b157b06c | 2621 | nfs_free_fhandle(mntfh); |
29eb981a | 2622 | return error; |
54ceac45 | 2623 | |
f7b422b1 | 2624 | out_free: |
54ceac45 | 2625 | nfs_free_server(server); |
29eb981a | 2626 | goto out; |
54ceac45 | 2627 | |
46c8ac74 EP |
2628 | error_splat_root: |
2629 | dput(mntroot); | |
54ceac45 | 2630 | error_splat_super: |
cfbc0683 N |
2631 | if (server && !s->s_root) |
2632 | bdi_unregister(&server->backing_dev_info); | |
2633 | error_splat_bdi: | |
6f5bbff9 | 2634 | deactivate_locked_super(s); |
29eb981a | 2635 | goto out; |
f7b422b1 DH |
2636 | } |
2637 | ||
c02d7adf TM |
2638 | static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type, |
2639 | int flags, void *data, const char *hostname) | |
2640 | { | |
2641 | struct vfsmount *root_mnt; | |
2642 | char *root_devname; | |
2643 | size_t len; | |
2644 | ||
2645 | len = strlen(hostname) + 3; | |
2646 | root_devname = kmalloc(len, GFP_KERNEL); | |
2647 | if (root_devname == NULL) | |
2648 | return ERR_PTR(-ENOMEM); | |
2649 | snprintf(root_devname, len, "%s:/", hostname); | |
2650 | root_mnt = vfs_kern_mount(fs_type, flags, root_devname, data); | |
2651 | kfree(root_devname); | |
2652 | return root_mnt; | |
2653 | } | |
2654 | ||
b88f8a54 TM |
2655 | static void nfs_fix_devname(const struct path *path, struct vfsmount *mnt) |
2656 | { | |
2657 | char *page = (char *) __get_free_page(GFP_KERNEL); | |
2658 | char *devname, *tmp; | |
2659 | ||
2660 | if (page == NULL) | |
2661 | return; | |
2662 | devname = nfs_path(path->mnt->mnt_devname, | |
2663 | path->mnt->mnt_root, path->dentry, | |
2664 | page, PAGE_SIZE); | |
cdd29ecf | 2665 | if (IS_ERR(devname)) |
b88f8a54 TM |
2666 | goto out_freepage; |
2667 | tmp = kstrdup(devname, GFP_KERNEL); | |
2668 | if (tmp == NULL) | |
2669 | goto out_freepage; | |
2670 | kfree(mnt->mnt_devname); | |
2671 | mnt->mnt_devname = tmp; | |
2672 | out_freepage: | |
2673 | free_page((unsigned long)page); | |
2674 | } | |
2675 | ||
ce587e07 TM |
2676 | struct nfs_referral_count { |
2677 | struct list_head list; | |
2678 | const struct task_struct *task; | |
2679 | unsigned int referral_count; | |
2680 | }; | |
2681 | ||
2682 | static LIST_HEAD(nfs_referral_count_list); | |
2683 | static DEFINE_SPINLOCK(nfs_referral_count_list_lock); | |
2684 | ||
2685 | static struct nfs_referral_count *nfs_find_referral_count(void) | |
2686 | { | |
2687 | struct nfs_referral_count *p; | |
2688 | ||
2689 | list_for_each_entry(p, &nfs_referral_count_list, list) { | |
2690 | if (p->task == current) | |
2691 | return p; | |
2692 | } | |
2693 | return NULL; | |
2694 | } | |
2695 | ||
2696 | #define NFS_MAX_NESTED_REFERRALS 2 | |
2697 | ||
2698 | static int nfs_referral_loop_protect(void) | |
2699 | { | |
2700 | struct nfs_referral_count *p, *new; | |
2701 | int ret = -ENOMEM; | |
2702 | ||
2703 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
2704 | if (!new) | |
2705 | goto out; | |
2706 | new->task = current; | |
2707 | new->referral_count = 1; | |
2708 | ||
2709 | ret = 0; | |
2710 | spin_lock(&nfs_referral_count_list_lock); | |
2711 | p = nfs_find_referral_count(); | |
2712 | if (p != NULL) { | |
2713 | if (p->referral_count >= NFS_MAX_NESTED_REFERRALS) | |
2714 | ret = -ELOOP; | |
2715 | else | |
2716 | p->referral_count++; | |
2717 | } else { | |
2718 | list_add(&new->list, &nfs_referral_count_list); | |
2719 | new = NULL; | |
2720 | } | |
2721 | spin_unlock(&nfs_referral_count_list_lock); | |
2722 | kfree(new); | |
2723 | out: | |
2724 | return ret; | |
2725 | } | |
2726 | ||
2727 | static void nfs_referral_loop_unprotect(void) | |
2728 | { | |
2729 | struct nfs_referral_count *p; | |
2730 | ||
2731 | spin_lock(&nfs_referral_count_list_lock); | |
2732 | p = nfs_find_referral_count(); | |
2733 | p->referral_count--; | |
2734 | if (p->referral_count == 0) | |
2735 | list_del(&p->list); | |
2736 | else | |
2737 | p = NULL; | |
2738 | spin_unlock(&nfs_referral_count_list_lock); | |
2739 | kfree(p); | |
2740 | } | |
2741 | ||
c02d7adf TM |
2742 | static int nfs_follow_remote_path(struct vfsmount *root_mnt, |
2743 | const char *export_path, struct vfsmount *mnt_target) | |
2744 | { | |
04ffdbe2 | 2745 | struct nameidata *nd = NULL; |
a2770d86 | 2746 | struct mnt_namespace *ns_private; |
c02d7adf TM |
2747 | struct super_block *s; |
2748 | int ret; | |
2749 | ||
04ffdbe2 TM |
2750 | nd = kmalloc(sizeof(*nd), GFP_KERNEL); |
2751 | if (nd == NULL) | |
2752 | return -ENOMEM; | |
2753 | ||
a2770d86 LT |
2754 | ns_private = create_mnt_ns(root_mnt); |
2755 | ret = PTR_ERR(ns_private); | |
2756 | if (IS_ERR(ns_private)) | |
2757 | goto out_mntput; | |
2758 | ||
ce587e07 TM |
2759 | ret = nfs_referral_loop_protect(); |
2760 | if (ret != 0) | |
2761 | goto out_put_mnt_ns; | |
2762 | ||
c02d7adf | 2763 | ret = vfs_path_lookup(root_mnt->mnt_root, root_mnt, |
04ffdbe2 | 2764 | export_path, LOOKUP_FOLLOW, nd); |
c02d7adf | 2765 | |
ce587e07 | 2766 | nfs_referral_loop_unprotect(); |
a2770d86 LT |
2767 | put_mnt_ns(ns_private); |
2768 | ||
c02d7adf TM |
2769 | if (ret != 0) |
2770 | goto out_err; | |
2771 | ||
04ffdbe2 | 2772 | s = nd->path.mnt->mnt_sb; |
c02d7adf TM |
2773 | atomic_inc(&s->s_active); |
2774 | mnt_target->mnt_sb = s; | |
04ffdbe2 | 2775 | mnt_target->mnt_root = dget(nd->path.dentry); |
c02d7adf | 2776 | |
b88f8a54 | 2777 | /* Correct the device pathname */ |
04ffdbe2 | 2778 | nfs_fix_devname(&nd->path, mnt_target); |
b88f8a54 | 2779 | |
04ffdbe2 TM |
2780 | path_put(&nd->path); |
2781 | kfree(nd); | |
c02d7adf TM |
2782 | down_write(&s->s_umount); |
2783 | return 0; | |
ce587e07 TM |
2784 | out_put_mnt_ns: |
2785 | put_mnt_ns(ns_private); | |
c02d7adf TM |
2786 | out_mntput: |
2787 | mntput(root_mnt); | |
2788 | out_err: | |
04ffdbe2 | 2789 | kfree(nd); |
c02d7adf TM |
2790 | return ret; |
2791 | } | |
2792 | ||
a6fe23be CL |
2793 | static int nfs4_try_mount(int flags, const char *dev_name, |
2794 | struct nfs_parsed_mount_data *data, | |
2795 | struct vfsmount *mnt) | |
2796 | { | |
2797 | char *export_path; | |
2798 | struct vfsmount *root_mnt; | |
2799 | int error; | |
2800 | ||
2801 | dfprintk(MOUNT, "--> nfs4_try_mount()\n"); | |
2802 | ||
2803 | export_path = data->nfs_server.export_path; | |
2804 | data->nfs_server.export_path = "/"; | |
2805 | root_mnt = nfs_do_root_mount(&nfs4_remote_fs_type, flags, data, | |
2806 | data->nfs_server.hostname); | |
2807 | data->nfs_server.export_path = export_path; | |
2808 | ||
2809 | error = PTR_ERR(root_mnt); | |
2810 | if (IS_ERR(root_mnt)) | |
2811 | goto out; | |
2812 | ||
2813 | error = nfs_follow_remote_path(root_mnt, export_path, mnt); | |
2814 | ||
2815 | out: | |
2816 | dfprintk(MOUNT, "<-- nfs4_try_mount() = %d%s\n", error, | |
2817 | error != 0 ? " [error]" : ""); | |
2818 | return error; | |
2819 | } | |
2820 | ||
c02d7adf TM |
2821 | /* |
2822 | * Get the superblock for an NFS4 mountpoint | |
2823 | */ | |
2824 | static int nfs4_get_sb(struct file_system_type *fs_type, | |
2825 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
2826 | { | |
2827 | struct nfs_parsed_mount_data *data; | |
c02d7adf TM |
2828 | int error = -ENOMEM; |
2829 | ||
c5811dbd | 2830 | data = nfs_alloc_parsed_mount_data(4); |
c02d7adf TM |
2831 | if (data == NULL) |
2832 | goto out_free_data; | |
2833 | ||
2834 | /* Validate the mount data */ | |
2835 | error = nfs4_validate_mount_data(raw_data, data, dev_name); | |
2836 | if (error < 0) | |
2837 | goto out; | |
2838 | ||
a6fe23be | 2839 | error = nfs4_try_mount(flags, dev_name, data, mnt); |
c02d7adf TM |
2840 | |
2841 | out: | |
2842 | kfree(data->client_address); | |
2843 | kfree(data->nfs_server.export_path); | |
2844 | kfree(data->nfs_server.hostname); | |
2845 | kfree(data->fscache_uniq); | |
2846 | out_free_data: | |
2847 | kfree(data); | |
2848 | dprintk("<-- nfs4_get_sb() = %d%s\n", error, | |
2849 | error != 0 ? " [error]" : ""); | |
2850 | return error; | |
2851 | } | |
2852 | ||
f7b422b1 DH |
2853 | static void nfs4_kill_super(struct super_block *sb) |
2854 | { | |
2855 | struct nfs_server *server = NFS_SB(sb); | |
2856 | ||
0f3e66c6 | 2857 | dprintk("--> %s\n", __func__); |
515d8611 | 2858 | nfs_super_return_all_delegations(sb); |
f7b422b1 | 2859 | kill_anon_super(sb); |
08734048 | 2860 | nfs_fscache_release_super_cookie(sb); |
54ceac45 | 2861 | nfs_free_server(server); |
0f3e66c6 | 2862 | dprintk("<-- %s\n", __func__); |
f7b422b1 DH |
2863 | } |
2864 | ||
2865 | /* | |
54ceac45 | 2866 | * Clone an NFS4 server record on xdev traversal (FSID-change) |
f7b422b1 | 2867 | */ |
54ceac45 DH |
2868 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags, |
2869 | const char *dev_name, void *raw_data, | |
2870 | struct vfsmount *mnt) | |
f7b422b1 | 2871 | { |
54ceac45 DH |
2872 | struct nfs_clone_mount *data = raw_data; |
2873 | struct super_block *s; | |
2874 | struct nfs_server *server; | |
2875 | struct dentry *mntroot; | |
75180df2 | 2876 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2877 | struct nfs_sb_mountdata sb_mntdata = { |
2878 | .mntflags = flags, | |
2879 | }; | |
54ceac45 | 2880 | int error; |
f7b422b1 | 2881 | |
54ceac45 | 2882 | dprintk("--> nfs4_xdev_get_sb()\n"); |
f7b422b1 | 2883 | |
54ceac45 DH |
2884 | /* create a new volume representation */ |
2885 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
2886 | if (IS_ERR(server)) { | |
2887 | error = PTR_ERR(server); | |
2888 | goto out_err_noserver; | |
f7b422b1 | 2889 | } |
e89a5a43 | 2890 | sb_mntdata.server = server; |
f7b422b1 | 2891 | |
75180df2 TM |
2892 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2893 | compare_super = NULL; | |
2894 | ||
54ceac45 | 2895 | /* Get a superblock - note that we may end up sharing one that already exists */ |
ec9a05c9 | 2896 | s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2897 | if (IS_ERR(s)) { |
2898 | error = PTR_ERR(s); | |
2899 | goto out_err_nosb; | |
f7b422b1 | 2900 | } |
f7b422b1 | 2901 | |
54ceac45 DH |
2902 | if (s->s_fs_info != server) { |
2903 | nfs_free_server(server); | |
2904 | server = NULL; | |
fa799759 MS |
2905 | } else { |
2906 | error = nfs_bdi_register(server); | |
2907 | if (error) | |
cfbc0683 | 2908 | goto error_splat_bdi; |
54ceac45 | 2909 | } |
f7b422b1 | 2910 | |
54ceac45 DH |
2911 | if (!s->s_root) { |
2912 | /* initial superblock/root creation */ | |
54ceac45 | 2913 | nfs4_clone_super(s, data->sb); |
2df54806 | 2914 | nfs_fscache_get_super_cookie(s, NULL, data); |
54ceac45 | 2915 | } |
f7b422b1 | 2916 | |
54ceac45 DH |
2917 | mntroot = nfs4_get_root(s, data->fh); |
2918 | if (IS_ERR(mntroot)) { | |
2919 | error = PTR_ERR(mntroot); | |
2920 | goto error_splat_super; | |
2921 | } | |
e9cc6c23 TM |
2922 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
2923 | dput(mntroot); | |
2924 | error = -ESTALE; | |
2925 | goto error_splat_super; | |
2926 | } | |
f7b422b1 | 2927 | |
54ceac45 DH |
2928 | s->s_flags |= MS_ACTIVE; |
2929 | mnt->mnt_sb = s; | |
2930 | mnt->mnt_root = mntroot; | |
2931 | ||
46c8ac74 EP |
2932 | security_sb_clone_mnt_opts(data->sb, s); |
2933 | ||
54ceac45 DH |
2934 | dprintk("<-- nfs4_xdev_get_sb() = 0\n"); |
2935 | return 0; | |
2936 | ||
2937 | out_err_nosb: | |
2938 | nfs_free_server(server); | |
2939 | out_err_noserver: | |
2940 | dprintk("<-- nfs4_xdev_get_sb() = %d [error]\n", error); | |
2941 | return error; | |
2942 | ||
2943 | error_splat_super: | |
cfbc0683 N |
2944 | if (server && !s->s_root) |
2945 | bdi_unregister(&server->backing_dev_info); | |
2946 | error_splat_bdi: | |
6f5bbff9 | 2947 | deactivate_locked_super(s); |
54ceac45 DH |
2948 | dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error); |
2949 | return error; | |
f7b422b1 DH |
2950 | } |
2951 | ||
c02d7adf TM |
2952 | static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type, |
2953 | int flags, const char *dev_name, void *raw_data, | |
2954 | struct vfsmount *mnt) | |
f7b422b1 DH |
2955 | { |
2956 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
2957 | struct super_block *s; |
2958 | struct nfs_server *server; | |
2959 | struct dentry *mntroot; | |
4f727296 | 2960 | struct nfs_fh *mntfh; |
75180df2 | 2961 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2962 | struct nfs_sb_mountdata sb_mntdata = { |
2963 | .mntflags = flags, | |
2964 | }; | |
4f727296 | 2965 | int error = -ENOMEM; |
54ceac45 DH |
2966 | |
2967 | dprintk("--> nfs4_referral_get_sb()\n"); | |
2968 | ||
4f727296 TM |
2969 | mntfh = nfs_alloc_fhandle(); |
2970 | if (mntfh == NULL) | |
2971 | goto out_err_nofh; | |
2972 | ||
54ceac45 | 2973 | /* create a new volume representation */ |
4f727296 | 2974 | server = nfs4_create_referral_server(data, mntfh); |
54ceac45 DH |
2975 | if (IS_ERR(server)) { |
2976 | error = PTR_ERR(server); | |
2977 | goto out_err_noserver; | |
2978 | } | |
e89a5a43 | 2979 | sb_mntdata.server = server; |
54ceac45 | 2980 | |
75180df2 TM |
2981 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2982 | compare_super = NULL; | |
2983 | ||
54ceac45 | 2984 | /* Get a superblock - note that we may end up sharing one that already exists */ |
ec9a05c9 | 2985 | s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2986 | if (IS_ERR(s)) { |
2987 | error = PTR_ERR(s); | |
2988 | goto out_err_nosb; | |
2989 | } | |
2990 | ||
2991 | if (s->s_fs_info != server) { | |
2992 | nfs_free_server(server); | |
2993 | server = NULL; | |
fa799759 MS |
2994 | } else { |
2995 | error = nfs_bdi_register(server); | |
2996 | if (error) | |
cfbc0683 | 2997 | goto error_splat_bdi; |
54ceac45 DH |
2998 | } |
2999 | ||
3000 | if (!s->s_root) { | |
3001 | /* initial superblock/root creation */ | |
54ceac45 | 3002 | nfs4_fill_super(s); |
2df54806 | 3003 | nfs_fscache_get_super_cookie(s, NULL, data); |
54ceac45 DH |
3004 | } |
3005 | ||
4f727296 | 3006 | mntroot = nfs4_get_root(s, mntfh); |
54ceac45 DH |
3007 | if (IS_ERR(mntroot)) { |
3008 | error = PTR_ERR(mntroot); | |
3009 | goto error_splat_super; | |
3010 | } | |
e9cc6c23 TM |
3011 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
3012 | dput(mntroot); | |
3013 | error = -ESTALE; | |
3014 | goto error_splat_super; | |
3015 | } | |
54ceac45 DH |
3016 | |
3017 | s->s_flags |= MS_ACTIVE; | |
3018 | mnt->mnt_sb = s; | |
3019 | mnt->mnt_root = mntroot; | |
3020 | ||
46c8ac74 EP |
3021 | security_sb_clone_mnt_opts(data->sb, s); |
3022 | ||
4f727296 | 3023 | nfs_free_fhandle(mntfh); |
54ceac45 DH |
3024 | dprintk("<-- nfs4_referral_get_sb() = 0\n"); |
3025 | return 0; | |
3026 | ||
3027 | out_err_nosb: | |
3028 | nfs_free_server(server); | |
3029 | out_err_noserver: | |
4f727296 TM |
3030 | nfs_free_fhandle(mntfh); |
3031 | out_err_nofh: | |
54ceac45 DH |
3032 | dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error); |
3033 | return error; | |
3034 | ||
3035 | error_splat_super: | |
cfbc0683 N |
3036 | if (server && !s->s_root) |
3037 | bdi_unregister(&server->backing_dev_info); | |
3038 | error_splat_bdi: | |
6f5bbff9 | 3039 | deactivate_locked_super(s); |
4f727296 | 3040 | nfs_free_fhandle(mntfh); |
54ceac45 DH |
3041 | dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error); |
3042 | return error; | |
f7b422b1 DH |
3043 | } |
3044 | ||
c02d7adf TM |
3045 | /* |
3046 | * Create an NFS4 server record on referral traversal | |
3047 | */ | |
3048 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, | |
3049 | int flags, const char *dev_name, void *raw_data, | |
3050 | struct vfsmount *mnt) | |
3051 | { | |
3052 | struct nfs_clone_mount *data = raw_data; | |
3053 | char *export_path; | |
3054 | struct vfsmount *root_mnt; | |
3055 | int error; | |
3056 | ||
3057 | dprintk("--> nfs4_referral_get_sb()\n"); | |
3058 | ||
3059 | export_path = data->mnt_path; | |
3060 | data->mnt_path = "/"; | |
3061 | ||
3062 | root_mnt = nfs_do_root_mount(&nfs4_remote_referral_fs_type, | |
3063 | flags, data, data->hostname); | |
3064 | data->mnt_path = export_path; | |
3065 | ||
3066 | error = PTR_ERR(root_mnt); | |
3067 | if (IS_ERR(root_mnt)) | |
3068 | goto out; | |
3069 | ||
3070 | error = nfs_follow_remote_path(root_mnt, export_path, mnt); | |
3071 | out: | |
3072 | dprintk("<-- nfs4_referral_get_sb() = %d%s\n", error, | |
3073 | error != 0 ? " [error]" : ""); | |
3074 | return error; | |
3075 | } | |
3076 | ||
54ceac45 | 3077 | #endif /* CONFIG_NFS_V4 */ |