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Commit | Line | Data |
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f7b422b1 DH |
1 | /* |
2 | * linux/fs/nfs/super.c | |
3 | * | |
4 | * Copyright (C) 1992 Rick Sladkey | |
5 | * | |
6 | * nfs superblock handling functions | |
7 | * | |
526719ba | 8 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
f7b422b1 DH |
9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
10 | * | |
11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
12 | * J.S.Peatfield@damtp.cam.ac.uk | |
13 | * | |
14 | * Split from inode.c by David Howells <dhowells@redhat.com> | |
15 | * | |
54ceac45 DH |
16 | * - superblocks are indexed on server only - all inodes, dentries, etc. associated with a |
17 | * particular server are held in the same superblock | |
18 | * - NFS superblocks can have several effective roots to the dentry tree | |
19 | * - directory type roots are spliced into the tree when a path from one root reaches the root | |
20 | * of another (see nfs_lookup()) | |
f7b422b1 DH |
21 | */ |
22 | ||
f7b422b1 DH |
23 | #include <linux/module.h> |
24 | #include <linux/init.h> | |
25 | ||
26 | #include <linux/time.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/string.h> | |
30 | #include <linux/stat.h> | |
31 | #include <linux/errno.h> | |
32 | #include <linux/unistd.h> | |
33 | #include <linux/sunrpc/clnt.h> | |
34 | #include <linux/sunrpc/stats.h> | |
35 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 36 | #include <linux/sunrpc/xprtsock.h> |
2cf7ff7a | 37 | #include <linux/sunrpc/xprtrdma.h> |
f7b422b1 DH |
38 | #include <linux/nfs_fs.h> |
39 | #include <linux/nfs_mount.h> | |
40 | #include <linux/nfs4_mount.h> | |
41 | #include <linux/lockd/bind.h> | |
f7b422b1 DH |
42 | #include <linux/seq_file.h> |
43 | #include <linux/mount.h> | |
c02d7adf | 44 | #include <linux/namei.h> |
f7b422b1 DH |
45 | #include <linux/nfs_idmap.h> |
46 | #include <linux/vfs.h> | |
47 | #include <linux/inet.h> | |
fd00a8ff | 48 | #include <linux/in6.h> |
5a0e3ad6 | 49 | #include <linux/slab.h> |
fd00a8ff | 50 | #include <net/ipv6.h> |
d8e7748a | 51 | #include <linux/netdevice.h> |
f7b422b1 | 52 | #include <linux/nfs_xdr.h> |
b5d5dfbd | 53 | #include <linux/magic.h> |
bf0fd768 | 54 | #include <linux/parser.h> |
e50a7a1a | 55 | #include <linux/nsproxy.h> |
f7b422b1 DH |
56 | |
57 | #include <asm/system.h> | |
58 | #include <asm/uaccess.h> | |
59 | ||
60 | #include "nfs4_fs.h" | |
61 | #include "callback.h" | |
62 | #include "delegation.h" | |
63 | #include "iostat.h" | |
64 | #include "internal.h" | |
08734048 | 65 | #include "fscache.h" |
ae50c0b5 | 66 | #include "pnfs.h" |
f7b422b1 DH |
67 | |
68 | #define NFSDBG_FACILITY NFSDBG_VFS | |
69 | ||
1e657bd5 PZ |
70 | #ifdef CONFIG_NFS_V3 |
71 | #define NFS_DEFAULT_VERSION 3 | |
72 | #else | |
73 | #define NFS_DEFAULT_VERSION 2 | |
74 | #endif | |
75 | ||
bf0fd768 CL |
76 | enum { |
77 | /* Mount options that take no arguments */ | |
78 | Opt_soft, Opt_hard, | |
bf0fd768 CL |
79 | Opt_posix, Opt_noposix, |
80 | Opt_cto, Opt_nocto, | |
81 | Opt_ac, Opt_noac, | |
82 | Opt_lock, Opt_nolock, | |
764302cc | 83 | Opt_v2, Opt_v3, Opt_v4, |
2cf7ff7a | 84 | Opt_udp, Opt_tcp, Opt_rdma, |
bf0fd768 CL |
85 | Opt_acl, Opt_noacl, |
86 | Opt_rdirplus, Opt_nordirplus, | |
75180df2 | 87 | Opt_sharecache, Opt_nosharecache, |
d740351b | 88 | Opt_resvport, Opt_noresvport, |
b797cac7 | 89 | Opt_fscache, Opt_nofscache, |
bf0fd768 CL |
90 | |
91 | /* Mount options that take integer arguments */ | |
92 | Opt_port, | |
93 | Opt_rsize, Opt_wsize, Opt_bsize, | |
94 | Opt_timeo, Opt_retrans, | |
95 | Opt_acregmin, Opt_acregmax, | |
96 | Opt_acdirmin, Opt_acdirmax, | |
97 | Opt_actimeo, | |
98 | Opt_namelen, | |
99 | Opt_mountport, | |
e887cbcf | 100 | Opt_mountvers, |
ad879cef | 101 | Opt_nfsvers, |
3fd5be9e | 102 | Opt_minorversion, |
bf0fd768 CL |
103 | |
104 | /* Mount options that take string arguments */ | |
33832034 | 105 | Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost, |
0ac83779 | 106 | Opt_addr, Opt_mountaddr, Opt_clientaddr, |
7973c1f1 | 107 | Opt_lookupcache, |
b797cac7 | 108 | Opt_fscache_uniq, |
5eebde23 | 109 | Opt_local_lock, |
bf0fd768 | 110 | |
f45663ce CL |
111 | /* Special mount options */ |
112 | Opt_userspace, Opt_deprecated, Opt_sloppy, | |
bf0fd768 CL |
113 | |
114 | Opt_err | |
115 | }; | |
116 | ||
a447c093 | 117 | static const match_table_t nfs_mount_option_tokens = { |
bf0fd768 CL |
118 | { Opt_userspace, "bg" }, |
119 | { Opt_userspace, "fg" }, | |
ecbb3845 CL |
120 | { Opt_userspace, "retry=%s" }, |
121 | ||
f45663ce CL |
122 | { Opt_sloppy, "sloppy" }, |
123 | ||
bf0fd768 CL |
124 | { Opt_soft, "soft" }, |
125 | { Opt_hard, "hard" }, | |
d33e4dfe CL |
126 | { Opt_deprecated, "intr" }, |
127 | { Opt_deprecated, "nointr" }, | |
bf0fd768 CL |
128 | { Opt_posix, "posix" }, |
129 | { Opt_noposix, "noposix" }, | |
130 | { Opt_cto, "cto" }, | |
131 | { Opt_nocto, "nocto" }, | |
132 | { Opt_ac, "ac" }, | |
133 | { Opt_noac, "noac" }, | |
134 | { Opt_lock, "lock" }, | |
135 | { Opt_nolock, "nolock" }, | |
136 | { Opt_v2, "v2" }, | |
137 | { Opt_v3, "v3" }, | |
764302cc | 138 | { Opt_v4, "v4" }, |
bf0fd768 CL |
139 | { Opt_udp, "udp" }, |
140 | { Opt_tcp, "tcp" }, | |
2cf7ff7a | 141 | { Opt_rdma, "rdma" }, |
bf0fd768 CL |
142 | { Opt_acl, "acl" }, |
143 | { Opt_noacl, "noacl" }, | |
144 | { Opt_rdirplus, "rdirplus" }, | |
145 | { Opt_nordirplus, "nordirplus" }, | |
75180df2 TM |
146 | { Opt_sharecache, "sharecache" }, |
147 | { Opt_nosharecache, "nosharecache" }, | |
d740351b CL |
148 | { Opt_resvport, "resvport" }, |
149 | { Opt_noresvport, "noresvport" }, | |
b797cac7 | 150 | { Opt_fscache, "fsc" }, |
b797cac7 | 151 | { Opt_nofscache, "nofsc" }, |
bf0fd768 | 152 | |
a5a16bae CL |
153 | { Opt_port, "port=%s" }, |
154 | { Opt_rsize, "rsize=%s" }, | |
155 | { Opt_wsize, "wsize=%s" }, | |
156 | { Opt_bsize, "bsize=%s" }, | |
157 | { Opt_timeo, "timeo=%s" }, | |
158 | { Opt_retrans, "retrans=%s" }, | |
159 | { Opt_acregmin, "acregmin=%s" }, | |
160 | { Opt_acregmax, "acregmax=%s" }, | |
161 | { Opt_acdirmin, "acdirmin=%s" }, | |
162 | { Opt_acdirmax, "acdirmax=%s" }, | |
163 | { Opt_actimeo, "actimeo=%s" }, | |
164 | { Opt_namelen, "namlen=%s" }, | |
165 | { Opt_mountport, "mountport=%s" }, | |
166 | { Opt_mountvers, "mountvers=%s" }, | |
167 | { Opt_nfsvers, "nfsvers=%s" }, | |
168 | { Opt_nfsvers, "vers=%s" }, | |
f3f4f4ed | 169 | { Opt_minorversion, "minorversion=%s" }, |
bf0fd768 CL |
170 | |
171 | { Opt_sec, "sec=%s" }, | |
172 | { Opt_proto, "proto=%s" }, | |
173 | { Opt_mountproto, "mountproto=%s" }, | |
174 | { Opt_addr, "addr=%s" }, | |
175 | { Opt_clientaddr, "clientaddr=%s" }, | |
33832034 | 176 | { Opt_mounthost, "mounthost=%s" }, |
0ac83779 | 177 | { Opt_mountaddr, "mountaddr=%s" }, |
bf0fd768 | 178 | |
7973c1f1 | 179 | { Opt_lookupcache, "lookupcache=%s" }, |
a6d5ff64 | 180 | { Opt_fscache_uniq, "fsc=%s" }, |
5eebde23 | 181 | { Opt_local_lock, "local_lock=%s" }, |
7973c1f1 | 182 | |
bf0fd768 CL |
183 | { Opt_err, NULL } |
184 | }; | |
185 | ||
186 | enum { | |
ee671b01 | 187 | Opt_xprt_udp, Opt_xprt_udp6, Opt_xprt_tcp, Opt_xprt_tcp6, Opt_xprt_rdma, |
bf0fd768 CL |
188 | |
189 | Opt_xprt_err | |
190 | }; | |
191 | ||
a447c093 | 192 | static const match_table_t nfs_xprt_protocol_tokens = { |
bf0fd768 | 193 | { Opt_xprt_udp, "udp" }, |
ee671b01 | 194 | { Opt_xprt_udp6, "udp6" }, |
bf0fd768 | 195 | { Opt_xprt_tcp, "tcp" }, |
ee671b01 | 196 | { Opt_xprt_tcp6, "tcp6" }, |
2cf7ff7a | 197 | { Opt_xprt_rdma, "rdma" }, |
bf0fd768 CL |
198 | |
199 | { Opt_xprt_err, NULL } | |
200 | }; | |
201 | ||
202 | enum { | |
203 | Opt_sec_none, Opt_sec_sys, | |
204 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
205 | Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, | |
206 | Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, | |
207 | ||
208 | Opt_sec_err | |
209 | }; | |
210 | ||
a447c093 | 211 | static const match_table_t nfs_secflavor_tokens = { |
bf0fd768 CL |
212 | { Opt_sec_none, "none" }, |
213 | { Opt_sec_none, "null" }, | |
214 | { Opt_sec_sys, "sys" }, | |
215 | ||
216 | { Opt_sec_krb5, "krb5" }, | |
217 | { Opt_sec_krb5i, "krb5i" }, | |
218 | { Opt_sec_krb5p, "krb5p" }, | |
219 | ||
220 | { Opt_sec_lkey, "lkey" }, | |
221 | { Opt_sec_lkeyi, "lkeyi" }, | |
222 | { Opt_sec_lkeyp, "lkeyp" }, | |
223 | ||
8d042218 OK |
224 | { Opt_sec_spkm, "spkm3" }, |
225 | { Opt_sec_spkmi, "spkm3i" }, | |
226 | { Opt_sec_spkmp, "spkm3p" }, | |
227 | ||
bf0fd768 CL |
228 | { Opt_sec_err, NULL } |
229 | }; | |
230 | ||
7973c1f1 TM |
231 | enum { |
232 | Opt_lookupcache_all, Opt_lookupcache_positive, | |
233 | Opt_lookupcache_none, | |
234 | ||
235 | Opt_lookupcache_err | |
236 | }; | |
237 | ||
238 | static match_table_t nfs_lookupcache_tokens = { | |
239 | { Opt_lookupcache_all, "all" }, | |
240 | { Opt_lookupcache_positive, "pos" }, | |
241 | { Opt_lookupcache_positive, "positive" }, | |
242 | { Opt_lookupcache_none, "none" }, | |
243 | ||
244 | { Opt_lookupcache_err, NULL } | |
245 | }; | |
246 | ||
5eebde23 SJ |
247 | enum { |
248 | Opt_local_lock_all, Opt_local_lock_flock, Opt_local_lock_posix, | |
249 | Opt_local_lock_none, | |
250 | ||
251 | Opt_local_lock_err | |
252 | }; | |
253 | ||
254 | static match_table_t nfs_local_lock_tokens = { | |
255 | { Opt_local_lock_all, "all" }, | |
256 | { Opt_local_lock_flock, "flock" }, | |
257 | { Opt_local_lock_posix, "posix" }, | |
258 | { Opt_local_lock_none, "none" }, | |
259 | ||
260 | { Opt_local_lock_err, NULL } | |
261 | }; | |
262 | ||
bf0fd768 | 263 | |
42faad99 | 264 | static void nfs_umount_begin(struct super_block *); |
816724e6 | 265 | static int nfs_statfs(struct dentry *, struct kstatfs *); |
34c80b1d | 266 | static int nfs_show_options(struct seq_file *, struct dentry *); |
d861c630 | 267 | static int nfs_show_devname(struct seq_file *, struct dentry *); |
a6322de6 | 268 | static int nfs_show_path(struct seq_file *, struct dentry *); |
64132379 | 269 | static int nfs_show_stats(struct seq_file *, struct dentry *); |
01194981 AV |
270 | static struct dentry *nfs_fs_mount(struct file_system_type *, |
271 | int, const char *, void *); | |
31f43471 AV |
272 | static struct dentry *nfs_xdev_mount(struct file_system_type *fs_type, |
273 | int flags, const char *dev_name, void *raw_data); | |
387c149b | 274 | static void nfs_put_super(struct super_block *); |
f7b422b1 | 275 | static void nfs_kill_super(struct super_block *); |
48b605f8 | 276 | static int nfs_remount(struct super_block *sb, int *flags, char *raw_data); |
f7b422b1 DH |
277 | |
278 | static struct file_system_type nfs_fs_type = { | |
279 | .owner = THIS_MODULE, | |
280 | .name = "nfs", | |
01194981 | 281 | .mount = nfs_fs_mount, |
f7b422b1 | 282 | .kill_sb = nfs_kill_super, |
349457cc | 283 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
284 | }; |
285 | ||
54ceac45 | 286 | struct file_system_type nfs_xdev_fs_type = { |
f7b422b1 DH |
287 | .owner = THIS_MODULE, |
288 | .name = "nfs", | |
31f43471 | 289 | .mount = nfs_xdev_mount, |
f7b422b1 | 290 | .kill_sb = nfs_kill_super, |
349457cc | 291 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
292 | }; |
293 | ||
ee9b6d61 | 294 | static const struct super_operations nfs_sops = { |
f7b422b1 DH |
295 | .alloc_inode = nfs_alloc_inode, |
296 | .destroy_inode = nfs_destroy_inode, | |
297 | .write_inode = nfs_write_inode, | |
387c149b | 298 | .put_super = nfs_put_super, |
f7b422b1 | 299 | .statfs = nfs_statfs, |
b57922d9 | 300 | .evict_inode = nfs_evict_inode, |
f7b422b1 DH |
301 | .umount_begin = nfs_umount_begin, |
302 | .show_options = nfs_show_options, | |
c7f404b4 AV |
303 | .show_devname = nfs_show_devname, |
304 | .show_path = nfs_show_path, | |
f7b422b1 | 305 | .show_stats = nfs_show_stats, |
48b605f8 | 306 | .remount_fs = nfs_remount, |
f7b422b1 DH |
307 | }; |
308 | ||
309 | #ifdef CONFIG_NFS_V4 | |
7630c852 CL |
310 | static int nfs4_validate_text_mount_data(void *options, |
311 | struct nfs_parsed_mount_data *args, const char *dev_name); | |
01194981 AV |
312 | static struct dentry *nfs4_try_mount(int flags, const char *dev_name, |
313 | struct nfs_parsed_mount_data *data); | |
314 | static struct dentry *nfs4_mount(struct file_system_type *fs_type, | |
315 | int flags, const char *dev_name, void *raw_data); | |
31f43471 AV |
316 | static struct dentry *nfs4_remote_mount(struct file_system_type *fs_type, |
317 | int flags, const char *dev_name, void *raw_data); | |
318 | static struct dentry *nfs4_xdev_mount(struct file_system_type *fs_type, | |
319 | int flags, const char *dev_name, void *raw_data); | |
01194981 AV |
320 | static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, |
321 | int flags, const char *dev_name, void *raw_data); | |
31f43471 AV |
322 | static struct dentry *nfs4_remote_referral_mount(struct file_system_type *fs_type, |
323 | int flags, const char *dev_name, void *raw_data); | |
f7b422b1 DH |
324 | static void nfs4_kill_super(struct super_block *sb); |
325 | ||
326 | static struct file_system_type nfs4_fs_type = { | |
327 | .owner = THIS_MODULE, | |
328 | .name = "nfs4", | |
01194981 | 329 | .mount = nfs4_mount, |
f7b422b1 | 330 | .kill_sb = nfs4_kill_super, |
349457cc | 331 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
332 | }; |
333 | ||
c02d7adf TM |
334 | static struct file_system_type nfs4_remote_fs_type = { |
335 | .owner = THIS_MODULE, | |
336 | .name = "nfs4", | |
31f43471 | 337 | .mount = nfs4_remote_mount, |
c02d7adf TM |
338 | .kill_sb = nfs4_kill_super, |
339 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, | |
340 | }; | |
341 | ||
54ceac45 | 342 | struct file_system_type nfs4_xdev_fs_type = { |
f7b422b1 DH |
343 | .owner = THIS_MODULE, |
344 | .name = "nfs4", | |
31f43471 | 345 | .mount = nfs4_xdev_mount, |
f7b422b1 | 346 | .kill_sb = nfs4_kill_super, |
349457cc | 347 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
348 | }; |
349 | ||
c02d7adf TM |
350 | static struct file_system_type nfs4_remote_referral_fs_type = { |
351 | .owner = THIS_MODULE, | |
352 | .name = "nfs4", | |
31f43471 | 353 | .mount = nfs4_remote_referral_mount, |
c02d7adf TM |
354 | .kill_sb = nfs4_kill_super, |
355 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, | |
356 | }; | |
357 | ||
54ceac45 | 358 | struct file_system_type nfs4_referral_fs_type = { |
f7b422b1 DH |
359 | .owner = THIS_MODULE, |
360 | .name = "nfs4", | |
01194981 | 361 | .mount = nfs4_referral_mount, |
f7b422b1 | 362 | .kill_sb = nfs4_kill_super, |
349457cc | 363 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
364 | }; |
365 | ||
ee9b6d61 | 366 | static const struct super_operations nfs4_sops = { |
f7b422b1 DH |
367 | .alloc_inode = nfs_alloc_inode, |
368 | .destroy_inode = nfs_destroy_inode, | |
369 | .write_inode = nfs_write_inode, | |
387c149b | 370 | .put_super = nfs_put_super, |
f7b422b1 | 371 | .statfs = nfs_statfs, |
b57922d9 | 372 | .evict_inode = nfs4_evict_inode, |
f7b422b1 DH |
373 | .umount_begin = nfs_umount_begin, |
374 | .show_options = nfs_show_options, | |
c7f404b4 AV |
375 | .show_devname = nfs_show_devname, |
376 | .show_path = nfs_show_path, | |
f7b422b1 | 377 | .show_stats = nfs_show_stats, |
48b605f8 | 378 | .remount_fs = nfs_remount, |
f7b422b1 DH |
379 | }; |
380 | #endif | |
381 | ||
8e1f936b RR |
382 | static struct shrinker acl_shrinker = { |
383 | .shrink = nfs_access_cache_shrinker, | |
384 | .seeks = DEFAULT_SEEKS, | |
385 | }; | |
979df72e | 386 | |
f7b422b1 DH |
387 | /* |
388 | * Register the NFS filesystems | |
389 | */ | |
390 | int __init register_nfs_fs(void) | |
391 | { | |
392 | int ret; | |
393 | ||
394 | ret = register_filesystem(&nfs_fs_type); | |
395 | if (ret < 0) | |
396 | goto error_0; | |
397 | ||
f7b422b1 DH |
398 | ret = nfs_register_sysctl(); |
399 | if (ret < 0) | |
400 | goto error_1; | |
89a09141 | 401 | #ifdef CONFIG_NFS_V4 |
f7b422b1 DH |
402 | ret = register_filesystem(&nfs4_fs_type); |
403 | if (ret < 0) | |
404 | goto error_2; | |
405 | #endif | |
8e1f936b | 406 | register_shrinker(&acl_shrinker); |
f7b422b1 DH |
407 | return 0; |
408 | ||
409 | #ifdef CONFIG_NFS_V4 | |
410 | error_2: | |
411 | nfs_unregister_sysctl(); | |
89a09141 | 412 | #endif |
f7b422b1 DH |
413 | error_1: |
414 | unregister_filesystem(&nfs_fs_type); | |
f7b422b1 DH |
415 | error_0: |
416 | return ret; | |
417 | } | |
418 | ||
419 | /* | |
420 | * Unregister the NFS filesystems | |
421 | */ | |
422 | void __exit unregister_nfs_fs(void) | |
423 | { | |
8e1f936b | 424 | unregister_shrinker(&acl_shrinker); |
f7b422b1 DH |
425 | #ifdef CONFIG_NFS_V4 |
426 | unregister_filesystem(&nfs4_fs_type); | |
f7b422b1 | 427 | #endif |
49af7ee1 | 428 | nfs_unregister_sysctl(); |
f7b422b1 DH |
429 | unregister_filesystem(&nfs_fs_type); |
430 | } | |
431 | ||
1daef0a8 | 432 | void nfs_sb_active(struct super_block *sb) |
ef818a28 | 433 | { |
1daef0a8 | 434 | struct nfs_server *server = NFS_SB(sb); |
ef818a28 | 435 | |
1daef0a8 TM |
436 | if (atomic_inc_return(&server->active) == 1) |
437 | atomic_inc(&sb->s_active); | |
ef818a28 SD |
438 | } |
439 | ||
1daef0a8 | 440 | void nfs_sb_deactive(struct super_block *sb) |
ef818a28 SD |
441 | { |
442 | struct nfs_server *server = NFS_SB(sb); | |
1daef0a8 TM |
443 | |
444 | if (atomic_dec_and_test(&server->active)) | |
445 | deactivate_super(sb); | |
ef818a28 SD |
446 | } |
447 | ||
f7b422b1 DH |
448 | /* |
449 | * Deliver file system statistics to userspace | |
450 | */ | |
816724e6 | 451 | static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
f7b422b1 | 452 | { |
0c7d90cf | 453 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
f7b422b1 DH |
454 | unsigned char blockbits; |
455 | unsigned long blockres; | |
0c7d90cf | 456 | struct nfs_fh *fh = NFS_FH(dentry->d_inode); |
ca7e9a0d TM |
457 | struct nfs_fsstat res; |
458 | int error = -ENOMEM; | |
459 | ||
460 | res.fattr = nfs_alloc_fattr(); | |
461 | if (res.fattr == NULL) | |
462 | goto out_err; | |
f7b422b1 | 463 | |
8fa5c000 | 464 | error = server->nfs_client->rpc_ops->statfs(server, fh, &res); |
fbf3fdd2 MZ |
465 | if (unlikely(error == -ESTALE)) { |
466 | struct dentry *pd_dentry; | |
467 | ||
468 | pd_dentry = dget_parent(dentry); | |
469 | if (pd_dentry != NULL) { | |
470 | nfs_zap_caches(pd_dentry->d_inode); | |
471 | dput(pd_dentry); | |
472 | } | |
473 | } | |
ca7e9a0d | 474 | nfs_free_fattr(res.fattr); |
f7b422b1 DH |
475 | if (error < 0) |
476 | goto out_err; | |
ca7e9a0d | 477 | |
1a0ba9ae | 478 | buf->f_type = NFS_SUPER_MAGIC; |
f7b422b1 DH |
479 | |
480 | /* | |
481 | * Current versions of glibc do not correctly handle the | |
482 | * case where f_frsize != f_bsize. Eventually we want to | |
483 | * report the value of wtmult in this field. | |
484 | */ | |
0c7d90cf | 485 | buf->f_frsize = dentry->d_sb->s_blocksize; |
f7b422b1 DH |
486 | |
487 | /* | |
488 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
489 | * are reported in units of f_frsize. Linux hasn't had | |
490 | * an f_frsize field in its statfs struct until recently, | |
491 | * thus historically Linux's sys_statfs reports these | |
492 | * fields in units of f_bsize. | |
493 | */ | |
0c7d90cf DH |
494 | buf->f_bsize = dentry->d_sb->s_blocksize; |
495 | blockbits = dentry->d_sb->s_blocksize_bits; | |
f7b422b1 DH |
496 | blockres = (1 << blockbits) - 1; |
497 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
498 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
499 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
500 | ||
501 | buf->f_files = res.tfiles; | |
502 | buf->f_ffree = res.afiles; | |
503 | ||
504 | buf->f_namelen = server->namelen; | |
1a0ba9ae | 505 | |
f7b422b1 DH |
506 | return 0; |
507 | ||
508 | out_err: | |
3110ff80 | 509 | dprintk("%s: statfs error = %d\n", __func__, -error); |
1a0ba9ae | 510 | return error; |
f7b422b1 DH |
511 | } |
512 | ||
7d4e2747 DH |
513 | /* |
514 | * Map the security flavour number to a name | |
515 | */ | |
81039f1f TM |
516 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
517 | { | |
7d4e2747 | 518 | static const struct { |
81039f1f TM |
519 | rpc_authflavor_t flavour; |
520 | const char *str; | |
521 | } sec_flavours[] = { | |
522 | { RPC_AUTH_NULL, "null" }, | |
523 | { RPC_AUTH_UNIX, "sys" }, | |
524 | { RPC_AUTH_GSS_KRB5, "krb5" }, | |
525 | { RPC_AUTH_GSS_KRB5I, "krb5i" }, | |
526 | { RPC_AUTH_GSS_KRB5P, "krb5p" }, | |
527 | { RPC_AUTH_GSS_LKEY, "lkey" }, | |
528 | { RPC_AUTH_GSS_LKEYI, "lkeyi" }, | |
529 | { RPC_AUTH_GSS_LKEYP, "lkeyp" }, | |
530 | { RPC_AUTH_GSS_SPKM, "spkm" }, | |
531 | { RPC_AUTH_GSS_SPKMI, "spkmi" }, | |
532 | { RPC_AUTH_GSS_SPKMP, "spkmp" }, | |
4d81cd16 | 533 | { UINT_MAX, "unknown" } |
81039f1f TM |
534 | }; |
535 | int i; | |
536 | ||
4d81cd16 | 537 | for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) { |
81039f1f TM |
538 | if (sec_flavours[i].flavour == flavour) |
539 | break; | |
540 | } | |
541 | return sec_flavours[i].str; | |
542 | } | |
543 | ||
ee671b01 JL |
544 | static void nfs_show_mountd_netid(struct seq_file *m, struct nfs_server *nfss, |
545 | int showdefaults) | |
546 | { | |
547 | struct sockaddr *sap = (struct sockaddr *) &nfss->mountd_address; | |
548 | ||
549 | seq_printf(m, ",mountproto="); | |
550 | switch (sap->sa_family) { | |
551 | case AF_INET: | |
552 | switch (nfss->mountd_protocol) { | |
553 | case IPPROTO_UDP: | |
554 | seq_printf(m, RPCBIND_NETID_UDP); | |
555 | break; | |
556 | case IPPROTO_TCP: | |
557 | seq_printf(m, RPCBIND_NETID_TCP); | |
558 | break; | |
559 | default: | |
560 | if (showdefaults) | |
561 | seq_printf(m, "auto"); | |
562 | } | |
563 | break; | |
564 | case AF_INET6: | |
565 | switch (nfss->mountd_protocol) { | |
566 | case IPPROTO_UDP: | |
567 | seq_printf(m, RPCBIND_NETID_UDP6); | |
568 | break; | |
569 | case IPPROTO_TCP: | |
570 | seq_printf(m, RPCBIND_NETID_TCP6); | |
571 | break; | |
572 | default: | |
573 | if (showdefaults) | |
574 | seq_printf(m, "auto"); | |
575 | } | |
576 | break; | |
577 | default: | |
578 | if (showdefaults) | |
579 | seq_printf(m, "auto"); | |
580 | } | |
581 | } | |
582 | ||
82d101d5 CL |
583 | static void nfs_show_mountd_options(struct seq_file *m, struct nfs_server *nfss, |
584 | int showdefaults) | |
585 | { | |
586 | struct sockaddr *sap = (struct sockaddr *)&nfss->mountd_address; | |
587 | ||
d5eff1a3 BS |
588 | if (nfss->flags & NFS_MOUNT_LEGACY_INTERFACE) |
589 | return; | |
590 | ||
82d101d5 CL |
591 | switch (sap->sa_family) { |
592 | case AF_INET: { | |
593 | struct sockaddr_in *sin = (struct sockaddr_in *)sap; | |
be859405 | 594 | seq_printf(m, ",mountaddr=%pI4", &sin->sin_addr.s_addr); |
82d101d5 CL |
595 | break; |
596 | } | |
597 | case AF_INET6: { | |
598 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
d250e190 | 599 | seq_printf(m, ",mountaddr=%pI6c", &sin6->sin6_addr); |
82d101d5 CL |
600 | break; |
601 | } | |
602 | default: | |
603 | if (showdefaults) | |
604 | seq_printf(m, ",mountaddr=unspecified"); | |
605 | } | |
606 | ||
607 | if (nfss->mountd_version || showdefaults) | |
608 | seq_printf(m, ",mountvers=%u", nfss->mountd_version); | |
aa699473 SK |
609 | if ((nfss->mountd_port && |
610 | nfss->mountd_port != (unsigned short)NFS_UNSPEC_PORT) || | |
611 | showdefaults) | |
82d101d5 CL |
612 | seq_printf(m, ",mountport=%u", nfss->mountd_port); |
613 | ||
ee671b01 | 614 | nfs_show_mountd_netid(m, nfss, showdefaults); |
82d101d5 CL |
615 | } |
616 | ||
0be8189f TM |
617 | #ifdef CONFIG_NFS_V4 |
618 | static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss, | |
619 | int showdefaults) | |
620 | { | |
621 | struct nfs_client *clp = nfss->nfs_client; | |
622 | ||
623 | seq_printf(m, ",clientaddr=%s", clp->cl_ipaddr); | |
624 | seq_printf(m, ",minorversion=%u", clp->cl_minorversion); | |
625 | } | |
626 | #else | |
627 | static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss, | |
628 | int showdefaults) | |
629 | { | |
630 | } | |
631 | #endif | |
632 | ||
f7b422b1 DH |
633 | /* |
634 | * Describe the mount options in force on this server representation | |
635 | */ | |
82d101d5 CL |
636 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, |
637 | int showdefaults) | |
f7b422b1 | 638 | { |
509de811 | 639 | static const struct proc_nfs_info { |
f7b422b1 | 640 | int flag; |
509de811 DH |
641 | const char *str; |
642 | const char *nostr; | |
f7b422b1 DH |
643 | } nfs_info[] = { |
644 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, | |
82d101d5 | 645 | { NFS_MOUNT_POSIX, ",posix", "" }, |
f7b422b1 DH |
646 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
647 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
648 | { NFS_MOUNT_NONLM, ",nolock", "" }, | |
649 | { NFS_MOUNT_NOACL, ",noacl", "" }, | |
74dd34e6 | 650 | { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" }, |
d740351b CL |
651 | { NFS_MOUNT_UNSHARED, ",nosharecache", "" }, |
652 | { NFS_MOUNT_NORESVPORT, ",noresvport", "" }, | |
f7b422b1 DH |
653 | { 0, NULL, NULL } |
654 | }; | |
509de811 | 655 | const struct proc_nfs_info *nfs_infop; |
8fa5c000 | 656 | struct nfs_client *clp = nfss->nfs_client; |
82d101d5 | 657 | u32 version = clp->rpc_ops->version; |
7c563cc9 | 658 | int local_flock, local_fcntl; |
f7b422b1 | 659 | |
82d101d5 | 660 | seq_printf(m, ",vers=%u", version); |
2d767432 CL |
661 | seq_printf(m, ",rsize=%u", nfss->rsize); |
662 | seq_printf(m, ",wsize=%u", nfss->wsize); | |
82d101d5 CL |
663 | if (nfss->bsize != 0) |
664 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
665 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
0e0cab74 | 666 | if (nfss->acregmin != NFS_DEF_ACREGMIN*HZ || showdefaults) |
2d767432 | 667 | seq_printf(m, ",acregmin=%u", nfss->acregmin/HZ); |
0e0cab74 | 668 | if (nfss->acregmax != NFS_DEF_ACREGMAX*HZ || showdefaults) |
2d767432 | 669 | seq_printf(m, ",acregmax=%u", nfss->acregmax/HZ); |
0e0cab74 | 670 | if (nfss->acdirmin != NFS_DEF_ACDIRMIN*HZ || showdefaults) |
2d767432 | 671 | seq_printf(m, ",acdirmin=%u", nfss->acdirmin/HZ); |
0e0cab74 | 672 | if (nfss->acdirmax != NFS_DEF_ACDIRMAX*HZ || showdefaults) |
2d767432 | 673 | seq_printf(m, ",acdirmax=%u", nfss->acdirmax/HZ); |
f7b422b1 DH |
674 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { |
675 | if (nfss->flags & nfs_infop->flag) | |
676 | seq_puts(m, nfs_infop->str); | |
677 | else | |
678 | seq_puts(m, nfs_infop->nostr); | |
679 | } | |
56928edd | 680 | seq_printf(m, ",proto=%s", |
ee671b01 | 681 | rpc_peeraddr2str(nfss->client, RPC_DISPLAY_NETID)); |
82d101d5 CL |
682 | if (version == 4) { |
683 | if (nfss->port != NFS_PORT) | |
684 | seq_printf(m, ",port=%u", nfss->port); | |
685 | } else | |
686 | if (nfss->port) | |
687 | seq_printf(m, ",port=%u", nfss->port); | |
688 | ||
33170233 TM |
689 | seq_printf(m, ",timeo=%lu", 10U * nfss->client->cl_timeout->to_initval / HZ); |
690 | seq_printf(m, ",retrans=%u", nfss->client->cl_timeout->to_retries); | |
81039f1f | 691 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
82d101d5 CL |
692 | |
693 | if (version != 4) | |
694 | nfs_show_mountd_options(m, nfss, showdefaults); | |
0be8189f TM |
695 | else |
696 | nfs_show_nfsv4_options(m, nfss, showdefaults); | |
82d101d5 | 697 | |
b797cac7 DH |
698 | if (nfss->options & NFS_OPTION_FSCACHE) |
699 | seq_printf(m, ",fsc"); | |
9b00c643 PL |
700 | |
701 | if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONEG) { | |
702 | if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONE) | |
703 | seq_printf(m, ",lookupcache=none"); | |
704 | else | |
705 | seq_printf(m, ",lookupcache=pos"); | |
706 | } | |
7c563cc9 SJ |
707 | |
708 | local_flock = nfss->flags & NFS_MOUNT_LOCAL_FLOCK; | |
709 | local_fcntl = nfss->flags & NFS_MOUNT_LOCAL_FCNTL; | |
710 | ||
711 | if (!local_flock && !local_fcntl) | |
712 | seq_printf(m, ",local_lock=none"); | |
713 | else if (local_flock && local_fcntl) | |
714 | seq_printf(m, ",local_lock=all"); | |
715 | else if (local_flock) | |
716 | seq_printf(m, ",local_lock=flock"); | |
717 | else | |
718 | seq_printf(m, ",local_lock=posix"); | |
f7b422b1 DH |
719 | } |
720 | ||
721 | /* | |
722 | * Describe the mount options on this VFS mountpoint | |
723 | */ | |
34c80b1d | 724 | static int nfs_show_options(struct seq_file *m, struct dentry *root) |
f7b422b1 | 725 | { |
34c80b1d | 726 | struct nfs_server *nfss = NFS_SB(root->d_sb); |
f7b422b1 DH |
727 | |
728 | nfs_show_mount_options(m, nfss, 0); | |
729 | ||
5d8515ca CL |
730 | seq_printf(m, ",addr=%s", |
731 | rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient, | |
732 | RPC_DISPLAY_ADDR)); | |
f7b422b1 DH |
733 | |
734 | return 0; | |
735 | } | |
45402c38 HS |
736 | |
737 | #ifdef CONFIG_NFS_V4 | |
ae50c0b5 | 738 | #ifdef CONFIG_NFS_V4_1 |
45402c38 | 739 | static void show_sessions(struct seq_file *m, struct nfs_server *server) |
ae50c0b5 BF |
740 | { |
741 | if (nfs4_has_session(server->nfs_client)) | |
742 | seq_printf(m, ",sessions"); | |
743 | } | |
744 | #else | |
45402c38 HS |
745 | static void show_sessions(struct seq_file *m, struct nfs_server *server) {} |
746 | #endif | |
ae50c0b5 BF |
747 | #endif |
748 | ||
45402c38 | 749 | #ifdef CONFIG_NFS_V4 |
ae50c0b5 | 750 | #ifdef CONFIG_NFS_V4_1 |
45402c38 | 751 | static void show_pnfs(struct seq_file *m, struct nfs_server *server) |
ae50c0b5 BF |
752 | { |
753 | seq_printf(m, ",pnfs="); | |
754 | if (server->pnfs_curr_ld) | |
755 | seq_printf(m, "%s", server->pnfs_curr_ld->name); | |
756 | else | |
757 | seq_printf(m, "not configured"); | |
758 | } | |
45402c38 HS |
759 | #else |
760 | static void show_pnfs(struct seq_file *m, struct nfs_server *server) {} | |
761 | #endif | |
762 | #endif | |
f7b422b1 | 763 | |
d861c630 | 764 | static int nfs_show_devname(struct seq_file *m, struct dentry *root) |
c7f404b4 AV |
765 | { |
766 | char *page = (char *) __get_free_page(GFP_KERNEL); | |
767 | char *devname, *dummy; | |
768 | int err = 0; | |
769 | if (!page) | |
770 | return -ENOMEM; | |
d861c630 | 771 | devname = nfs_path(&dummy, root, page, PAGE_SIZE); |
c7f404b4 AV |
772 | if (IS_ERR(devname)) |
773 | err = PTR_ERR(devname); | |
774 | else | |
775 | seq_escape(m, devname, " \t\n\\"); | |
776 | free_page((unsigned long)page); | |
777 | return err; | |
778 | } | |
779 | ||
a6322de6 | 780 | static int nfs_show_path(struct seq_file *m, struct dentry *dentry) |
c7f404b4 AV |
781 | { |
782 | seq_puts(m, "/"); | |
783 | return 0; | |
784 | } | |
785 | ||
f7b422b1 DH |
786 | /* |
787 | * Present statistical information for this VFS mountpoint | |
788 | */ | |
64132379 | 789 | static int nfs_show_stats(struct seq_file *m, struct dentry *root) |
f7b422b1 DH |
790 | { |
791 | int i, cpu; | |
64132379 | 792 | struct nfs_server *nfss = NFS_SB(root->d_sb); |
f7b422b1 DH |
793 | struct rpc_auth *auth = nfss->client->cl_auth; |
794 | struct nfs_iostats totals = { }; | |
795 | ||
796 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
797 | ||
798 | /* | |
799 | * Display all mount option settings | |
800 | */ | |
801 | seq_printf(m, "\n\topts:\t"); | |
64132379 AV |
802 | seq_puts(m, root->d_sb->s_flags & MS_RDONLY ? "ro" : "rw"); |
803 | seq_puts(m, root->d_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); | |
804 | seq_puts(m, root->d_sb->s_flags & MS_NOATIME ? ",noatime" : ""); | |
805 | seq_puts(m, root->d_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); | |
f7b422b1 DH |
806 | nfs_show_mount_options(m, nfss, 1); |
807 | ||
808 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); | |
809 | ||
810 | seq_printf(m, "\n\tcaps:\t"); | |
811 | seq_printf(m, "caps=0x%x", nfss->caps); | |
2d767432 CL |
812 | seq_printf(m, ",wtmult=%u", nfss->wtmult); |
813 | seq_printf(m, ",dtsize=%u", nfss->dtsize); | |
814 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
815 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
f7b422b1 DH |
816 | |
817 | #ifdef CONFIG_NFS_V4 | |
40c55319 | 818 | if (nfss->nfs_client->rpc_ops->version == 4) { |
f7b422b1 DH |
819 | seq_printf(m, "\n\tnfsv4:\t"); |
820 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); | |
821 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
822 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); | |
ae50c0b5 BF |
823 | show_sessions(m, nfss); |
824 | show_pnfs(m, nfss); | |
f7b422b1 DH |
825 | } |
826 | #endif | |
827 | ||
828 | /* | |
829 | * Display security flavor in effect for this mount | |
830 | */ | |
2d767432 | 831 | seq_printf(m, "\n\tsec:\tflavor=%u", auth->au_ops->au_flavor); |
f7b422b1 | 832 | if (auth->au_flavor) |
2d767432 | 833 | seq_printf(m, ",pseudoflavor=%u", auth->au_flavor); |
f7b422b1 DH |
834 | |
835 | /* | |
836 | * Display superblock I/O counters | |
837 | */ | |
838 | for_each_possible_cpu(cpu) { | |
839 | struct nfs_iostats *stats; | |
840 | ||
841 | preempt_disable(); | |
842 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
843 | ||
844 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
845 | totals.events[i] += stats->events[i]; | |
846 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
847 | totals.bytes[i] += stats->bytes[i]; | |
6a51091d DH |
848 | #ifdef CONFIG_NFS_FSCACHE |
849 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
850 | totals.fscache[i] += stats->fscache[i]; | |
851 | #endif | |
f7b422b1 DH |
852 | |
853 | preempt_enable(); | |
854 | } | |
855 | ||
856 | seq_printf(m, "\n\tevents:\t"); | |
857 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
858 | seq_printf(m, "%lu ", totals.events[i]); | |
859 | seq_printf(m, "\n\tbytes:\t"); | |
860 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
861 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
6a51091d DH |
862 | #ifdef CONFIG_NFS_FSCACHE |
863 | if (nfss->options & NFS_OPTION_FSCACHE) { | |
864 | seq_printf(m, "\n\tfsc:\t"); | |
865 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
866 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
867 | } | |
868 | #endif | |
f7b422b1 DH |
869 | seq_printf(m, "\n"); |
870 | ||
871 | rpc_print_iostats(m, nfss->client); | |
872 | ||
873 | return 0; | |
874 | } | |
875 | ||
876 | /* | |
877 | * Begin unmount by attempting to remove all automounted mountpoints we added | |
54ceac45 | 878 | * in response to xdev traversals and referrals |
f7b422b1 | 879 | */ |
42faad99 | 880 | static void nfs_umount_begin(struct super_block *sb) |
f7b422b1 | 881 | { |
67e55205 | 882 | struct nfs_server *server; |
fc6ae3cf TM |
883 | struct rpc_clnt *rpc; |
884 | ||
67e55205 | 885 | server = NFS_SB(sb); |
fc6ae3cf TM |
886 | /* -EIO all pending I/O */ |
887 | rpc = server->client_acl; | |
888 | if (!IS_ERR(rpc)) | |
889 | rpc_killall_tasks(rpc); | |
890 | rpc = server->client; | |
891 | if (!IS_ERR(rpc)) | |
892 | rpc_killall_tasks(rpc); | |
f7b422b1 DH |
893 | } |
894 | ||
c5811dbd | 895 | static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(unsigned int version) |
9423a08a CL |
896 | { |
897 | struct nfs_parsed_mount_data *data; | |
898 | ||
899 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
900 | if (data) { | |
9423a08a CL |
901 | data->acregmin = NFS_DEF_ACREGMIN; |
902 | data->acregmax = NFS_DEF_ACREGMAX; | |
903 | data->acdirmin = NFS_DEF_ACDIRMIN; | |
904 | data->acdirmax = NFS_DEF_ACDIRMAX; | |
c5811dbd | 905 | data->mount_server.port = NFS_UNSPEC_PORT; |
9423a08a | 906 | data->nfs_server.port = NFS_UNSPEC_PORT; |
c5811dbd | 907 | data->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
9423a08a CL |
908 | data->auth_flavors[0] = RPC_AUTH_UNIX; |
909 | data->auth_flavor_len = 1; | |
c5811dbd | 910 | data->version = version; |
9423a08a | 911 | data->minorversion = 0; |
8a0d551a | 912 | security_init_mnt_opts(&data->lsm_opts); |
9423a08a CL |
913 | } |
914 | return data; | |
915 | } | |
916 | ||
8a0d551a JL |
917 | static void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data *data) |
918 | { | |
919 | if (data) { | |
920 | kfree(data->client_address); | |
921 | kfree(data->mount_server.hostname); | |
922 | kfree(data->nfs_server.export_path); | |
923 | kfree(data->nfs_server.hostname); | |
924 | kfree(data->fscache_uniq); | |
925 | security_free_mnt_opts(&data->lsm_opts); | |
926 | kfree(data); | |
927 | } | |
928 | } | |
929 | ||
fc50d58f | 930 | /* |
cdcd7f9a CL |
931 | * Sanity-check a server address provided by the mount command. |
932 | * | |
933 | * Address family must be initialized, and address must not be | |
934 | * the ANY address for that family. | |
fc50d58f CL |
935 | */ |
936 | static int nfs_verify_server_address(struct sockaddr *addr) | |
937 | { | |
938 | switch (addr->sa_family) { | |
939 | case AF_INET: { | |
cdcd7f9a | 940 | struct sockaddr_in *sa = (struct sockaddr_in *)addr; |
e6f1cebf | 941 | return sa->sin_addr.s_addr != htonl(INADDR_ANY); |
cdcd7f9a CL |
942 | } |
943 | case AF_INET6: { | |
944 | struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr; | |
945 | return !ipv6_addr_any(sa); | |
fc50d58f CL |
946 | } |
947 | } | |
948 | ||
53a0b9c4 | 949 | dfprintk(MOUNT, "NFS: Invalid IP address specified\n"); |
fc50d58f CL |
950 | return 0; |
951 | } | |
952 | ||
4cfd74fc CL |
953 | /* |
954 | * Select between a default port value and a user-specified port value. | |
955 | * If a zero value is set, then autobind will be used. | |
956 | */ | |
f5855fec | 957 | static void nfs_set_port(struct sockaddr *sap, int *port, |
4cfd74fc CL |
958 | const unsigned short default_port) |
959 | { | |
f5855fec TM |
960 | if (*port == NFS_UNSPEC_PORT) |
961 | *port = default_port; | |
4cfd74fc | 962 | |
f5855fec | 963 | rpc_set_port(sap, *port); |
4cfd74fc CL |
964 | } |
965 | ||
259875ef TM |
966 | /* |
967 | * Sanity check the NFS transport protocol. | |
968 | * | |
969 | */ | |
970 | static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
971 | { | |
972 | switch (mnt->nfs_server.protocol) { | |
973 | case XPRT_TRANSPORT_UDP: | |
974 | case XPRT_TRANSPORT_TCP: | |
975 | case XPRT_TRANSPORT_RDMA: | |
976 | break; | |
977 | default: | |
978 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; | |
979 | } | |
980 | } | |
981 | ||
982 | /* | |
983 | * For text based NFSv2/v3 mounts, the mount protocol transport default | |
984 | * settings should depend upon the specified NFS transport. | |
985 | */ | |
986 | static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
987 | { | |
988 | nfs_validate_transport_protocol(mnt); | |
989 | ||
990 | if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP || | |
991 | mnt->mount_server.protocol == XPRT_TRANSPORT_TCP) | |
992 | return; | |
993 | switch (mnt->nfs_server.protocol) { | |
994 | case XPRT_TRANSPORT_UDP: | |
995 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; | |
996 | break; | |
997 | case XPRT_TRANSPORT_TCP: | |
998 | case XPRT_TRANSPORT_RDMA: | |
999 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; | |
1000 | } | |
1001 | } | |
1002 | ||
01060c89 CL |
1003 | /* |
1004 | * Parse the value of the 'sec=' option. | |
01060c89 CL |
1005 | */ |
1006 | static int nfs_parse_security_flavors(char *value, | |
1007 | struct nfs_parsed_mount_data *mnt) | |
1008 | { | |
1009 | substring_t args[MAX_OPT_ARGS]; | |
1010 | ||
1011 | dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); | |
1012 | ||
1013 | switch (match_token(value, nfs_secflavor_tokens, args)) { | |
1014 | case Opt_sec_none: | |
01060c89 CL |
1015 | mnt->auth_flavors[0] = RPC_AUTH_NULL; |
1016 | break; | |
1017 | case Opt_sec_sys: | |
01060c89 CL |
1018 | mnt->auth_flavors[0] = RPC_AUTH_UNIX; |
1019 | break; | |
1020 | case Opt_sec_krb5: | |
01060c89 CL |
1021 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5; |
1022 | break; | |
1023 | case Opt_sec_krb5i: | |
01060c89 CL |
1024 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I; |
1025 | break; | |
1026 | case Opt_sec_krb5p: | |
01060c89 CL |
1027 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P; |
1028 | break; | |
1029 | case Opt_sec_lkey: | |
01060c89 CL |
1030 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY; |
1031 | break; | |
1032 | case Opt_sec_lkeyi: | |
01060c89 CL |
1033 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI; |
1034 | break; | |
1035 | case Opt_sec_lkeyp: | |
01060c89 CL |
1036 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP; |
1037 | break; | |
1038 | case Opt_sec_spkm: | |
01060c89 CL |
1039 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM; |
1040 | break; | |
1041 | case Opt_sec_spkmi: | |
01060c89 CL |
1042 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI; |
1043 | break; | |
1044 | case Opt_sec_spkmp: | |
01060c89 CL |
1045 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP; |
1046 | break; | |
1047 | default: | |
1048 | return 0; | |
1049 | } | |
1050 | ||
9b7160c5 | 1051 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; |
059f90b3 | 1052 | mnt->auth_flavor_len = 1; |
01060c89 CL |
1053 | return 1; |
1054 | } | |
1055 | ||
c5cb09b6 RL |
1056 | static int nfs_get_option_str(substring_t args[], char **option) |
1057 | { | |
1058 | kfree(*option); | |
1059 | *option = match_strdup(args); | |
1060 | return !option; | |
1061 | } | |
1062 | ||
1063 | static int nfs_get_option_ul(substring_t args[], unsigned long *option) | |
1064 | { | |
1065 | int rc; | |
1066 | char *string; | |
1067 | ||
1068 | string = match_strdup(args); | |
1069 | if (string == NULL) | |
1070 | return -ENOMEM; | |
1071 | rc = strict_strtoul(string, 10, option); | |
1072 | kfree(string); | |
1073 | ||
1074 | return rc; | |
1075 | } | |
1076 | ||
bf0fd768 CL |
1077 | /* |
1078 | * Error-check and convert a string of mount options from user space into | |
f45663ce CL |
1079 | * a data structure. The whole mount string is processed; bad options are |
1080 | * skipped as they are encountered. If there were no errors, return 1; | |
1081 | * otherwise return 0 (zero). | |
bf0fd768 CL |
1082 | */ |
1083 | static int nfs_parse_mount_options(char *raw, | |
1084 | struct nfs_parsed_mount_data *mnt) | |
1085 | { | |
f9c3a380 | 1086 | char *p, *string, *secdata; |
d23c45fd | 1087 | int rc, sloppy = 0, invalid_option = 0; |
ee671b01 JL |
1088 | unsigned short protofamily = AF_UNSPEC; |
1089 | unsigned short mountfamily = AF_UNSPEC; | |
bf0fd768 CL |
1090 | |
1091 | if (!raw) { | |
1092 | dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); | |
1093 | return 1; | |
1094 | } | |
1095 | dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); | |
1096 | ||
f9c3a380 EP |
1097 | secdata = alloc_secdata(); |
1098 | if (!secdata) | |
1099 | goto out_nomem; | |
1100 | ||
1101 | rc = security_sb_copy_data(raw, secdata); | |
1102 | if (rc) | |
1103 | goto out_security_failure; | |
1104 | ||
1105 | rc = security_sb_parse_opts_str(secdata, &mnt->lsm_opts); | |
1106 | if (rc) | |
1107 | goto out_security_failure; | |
1108 | ||
1109 | free_secdata(secdata); | |
1110 | ||
e50a7a1a SK |
1111 | mnt->net = current->nsproxy->net_ns; |
1112 | ||
bf0fd768 CL |
1113 | while ((p = strsep(&raw, ",")) != NULL) { |
1114 | substring_t args[MAX_OPT_ARGS]; | |
a5a16bae CL |
1115 | unsigned long option; |
1116 | int token; | |
bf0fd768 CL |
1117 | |
1118 | if (!*p) | |
1119 | continue; | |
1120 | ||
1121 | dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); | |
1122 | ||
1123 | token = match_token(p, nfs_mount_option_tokens, args); | |
1124 | switch (token) { | |
f45663ce CL |
1125 | |
1126 | /* | |
1127 | * boolean options: foo/nofoo | |
1128 | */ | |
bf0fd768 CL |
1129 | case Opt_soft: |
1130 | mnt->flags |= NFS_MOUNT_SOFT; | |
1131 | break; | |
1132 | case Opt_hard: | |
1133 | mnt->flags &= ~NFS_MOUNT_SOFT; | |
1134 | break; | |
bf0fd768 CL |
1135 | case Opt_posix: |
1136 | mnt->flags |= NFS_MOUNT_POSIX; | |
1137 | break; | |
1138 | case Opt_noposix: | |
1139 | mnt->flags &= ~NFS_MOUNT_POSIX; | |
1140 | break; | |
1141 | case Opt_cto: | |
1142 | mnt->flags &= ~NFS_MOUNT_NOCTO; | |
1143 | break; | |
1144 | case Opt_nocto: | |
1145 | mnt->flags |= NFS_MOUNT_NOCTO; | |
1146 | break; | |
1147 | case Opt_ac: | |
1148 | mnt->flags &= ~NFS_MOUNT_NOAC; | |
1149 | break; | |
1150 | case Opt_noac: | |
1151 | mnt->flags |= NFS_MOUNT_NOAC; | |
1152 | break; | |
1153 | case Opt_lock: | |
1154 | mnt->flags &= ~NFS_MOUNT_NONLM; | |
5eebde23 SJ |
1155 | mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | |
1156 | NFS_MOUNT_LOCAL_FCNTL); | |
bf0fd768 CL |
1157 | break; |
1158 | case Opt_nolock: | |
1159 | mnt->flags |= NFS_MOUNT_NONLM; | |
5eebde23 SJ |
1160 | mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | |
1161 | NFS_MOUNT_LOCAL_FCNTL); | |
bf0fd768 CL |
1162 | break; |
1163 | case Opt_v2: | |
1164 | mnt->flags &= ~NFS_MOUNT_VER3; | |
764302cc | 1165 | mnt->version = 2; |
bf0fd768 CL |
1166 | break; |
1167 | case Opt_v3: | |
1168 | mnt->flags |= NFS_MOUNT_VER3; | |
764302cc | 1169 | mnt->version = 3; |
bf0fd768 | 1170 | break; |
764302cc CL |
1171 | case Opt_v4: |
1172 | mnt->flags &= ~NFS_MOUNT_VER3; | |
1173 | mnt->version = 4; | |
1174 | break; | |
bf0fd768 CL |
1175 | case Opt_udp: |
1176 | mnt->flags &= ~NFS_MOUNT_TCP; | |
0896a725 | 1177 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 CL |
1178 | break; |
1179 | case Opt_tcp: | |
1180 | mnt->flags |= NFS_MOUNT_TCP; | |
0896a725 | 1181 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1182 | break; |
2cf7ff7a TT |
1183 | case Opt_rdma: |
1184 | mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ | |
1185 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 1186 | xprt_load_transport(p); |
2cf7ff7a | 1187 | break; |
bf0fd768 CL |
1188 | case Opt_acl: |
1189 | mnt->flags &= ~NFS_MOUNT_NOACL; | |
1190 | break; | |
1191 | case Opt_noacl: | |
1192 | mnt->flags |= NFS_MOUNT_NOACL; | |
1193 | break; | |
1194 | case Opt_rdirplus: | |
1195 | mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; | |
1196 | break; | |
1197 | case Opt_nordirplus: | |
1198 | mnt->flags |= NFS_MOUNT_NORDIRPLUS; | |
1199 | break; | |
75180df2 TM |
1200 | case Opt_sharecache: |
1201 | mnt->flags &= ~NFS_MOUNT_UNSHARED; | |
1202 | break; | |
1203 | case Opt_nosharecache: | |
1204 | mnt->flags |= NFS_MOUNT_UNSHARED; | |
1205 | break; | |
d740351b CL |
1206 | case Opt_resvport: |
1207 | mnt->flags &= ~NFS_MOUNT_NORESVPORT; | |
1208 | break; | |
1209 | case Opt_noresvport: | |
1210 | mnt->flags |= NFS_MOUNT_NORESVPORT; | |
1211 | break; | |
b797cac7 DH |
1212 | case Opt_fscache: |
1213 | mnt->options |= NFS_OPTION_FSCACHE; | |
1214 | kfree(mnt->fscache_uniq); | |
1215 | mnt->fscache_uniq = NULL; | |
1216 | break; | |
1217 | case Opt_nofscache: | |
1218 | mnt->options &= ~NFS_OPTION_FSCACHE; | |
1219 | kfree(mnt->fscache_uniq); | |
1220 | mnt->fscache_uniq = NULL; | |
1221 | break; | |
bf0fd768 | 1222 | |
f45663ce CL |
1223 | /* |
1224 | * options that take numeric values | |
1225 | */ | |
bf0fd768 | 1226 | case Opt_port: |
c5cb09b6 RL |
1227 | if (nfs_get_option_ul(args, &option) || |
1228 | option > USHRT_MAX) | |
d23c45fd CL |
1229 | goto out_invalid_value; |
1230 | mnt->nfs_server.port = option; | |
bf0fd768 CL |
1231 | break; |
1232 | case Opt_rsize: | |
c5cb09b6 | 1233 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1234 | goto out_invalid_value; |
1235 | mnt->rsize = option; | |
bf0fd768 CL |
1236 | break; |
1237 | case Opt_wsize: | |
c5cb09b6 | 1238 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1239 | goto out_invalid_value; |
1240 | mnt->wsize = option; | |
bf0fd768 CL |
1241 | break; |
1242 | case Opt_bsize: | |
c5cb09b6 | 1243 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1244 | goto out_invalid_value; |
1245 | mnt->bsize = option; | |
bf0fd768 CL |
1246 | break; |
1247 | case Opt_timeo: | |
c5cb09b6 | 1248 | if (nfs_get_option_ul(args, &option) || option == 0) |
d23c45fd CL |
1249 | goto out_invalid_value; |
1250 | mnt->timeo = option; | |
bf0fd768 CL |
1251 | break; |
1252 | case Opt_retrans: | |
c5cb09b6 | 1253 | if (nfs_get_option_ul(args, &option) || option == 0) |
d23c45fd CL |
1254 | goto out_invalid_value; |
1255 | mnt->retrans = option; | |
bf0fd768 CL |
1256 | break; |
1257 | case Opt_acregmin: | |
c5cb09b6 | 1258 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1259 | goto out_invalid_value; |
1260 | mnt->acregmin = option; | |
bf0fd768 CL |
1261 | break; |
1262 | case Opt_acregmax: | |
c5cb09b6 | 1263 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1264 | goto out_invalid_value; |
1265 | mnt->acregmax = option; | |
bf0fd768 CL |
1266 | break; |
1267 | case Opt_acdirmin: | |
c5cb09b6 | 1268 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1269 | goto out_invalid_value; |
1270 | mnt->acdirmin = option; | |
bf0fd768 CL |
1271 | break; |
1272 | case Opt_acdirmax: | |
c5cb09b6 | 1273 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1274 | goto out_invalid_value; |
1275 | mnt->acdirmax = option; | |
bf0fd768 CL |
1276 | break; |
1277 | case Opt_actimeo: | |
c5cb09b6 | 1278 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1279 | goto out_invalid_value; |
1280 | mnt->acregmin = mnt->acregmax = | |
1281 | mnt->acdirmin = mnt->acdirmax = option; | |
bf0fd768 CL |
1282 | break; |
1283 | case Opt_namelen: | |
c5cb09b6 | 1284 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1285 | goto out_invalid_value; |
1286 | mnt->namlen = option; | |
bf0fd768 CL |
1287 | break; |
1288 | case Opt_mountport: | |
c5cb09b6 RL |
1289 | if (nfs_get_option_ul(args, &option) || |
1290 | option > USHRT_MAX) | |
d23c45fd CL |
1291 | goto out_invalid_value; |
1292 | mnt->mount_server.port = option; | |
bf0fd768 | 1293 | break; |
bf0fd768 | 1294 | case Opt_mountvers: |
c5cb09b6 | 1295 | if (nfs_get_option_ul(args, &option) || |
f45663ce | 1296 | option < NFS_MNT_VERSION || |
d23c45fd CL |
1297 | option > NFS_MNT3_VERSION) |
1298 | goto out_invalid_value; | |
1299 | mnt->mount_server.version = option; | |
bf0fd768 | 1300 | break; |
bf0fd768 | 1301 | case Opt_nfsvers: |
c5cb09b6 | 1302 | if (nfs_get_option_ul(args, &option)) |
d23c45fd | 1303 | goto out_invalid_value; |
bf0fd768 | 1304 | switch (option) { |
f45663ce | 1305 | case NFS2_VERSION: |
bf0fd768 | 1306 | mnt->flags &= ~NFS_MOUNT_VER3; |
764302cc | 1307 | mnt->version = 2; |
bf0fd768 | 1308 | break; |
f45663ce | 1309 | case NFS3_VERSION: |
bf0fd768 | 1310 | mnt->flags |= NFS_MOUNT_VER3; |
764302cc CL |
1311 | mnt->version = 3; |
1312 | break; | |
764302cc CL |
1313 | case NFS4_VERSION: |
1314 | mnt->flags &= ~NFS_MOUNT_VER3; | |
1315 | mnt->version = 4; | |
bf0fd768 CL |
1316 | break; |
1317 | default: | |
d23c45fd | 1318 | goto out_invalid_value; |
bf0fd768 CL |
1319 | } |
1320 | break; | |
3fd5be9e | 1321 | case Opt_minorversion: |
c5cb09b6 | 1322 | if (nfs_get_option_ul(args, &option)) |
f3f4f4ed CL |
1323 | goto out_invalid_value; |
1324 | if (option > NFS4_MAX_MINOR_VERSION) | |
1325 | goto out_invalid_value; | |
1326 | mnt->minorversion = option; | |
3fd5be9e | 1327 | break; |
bf0fd768 | 1328 | |
f45663ce CL |
1329 | /* |
1330 | * options that take text values | |
1331 | */ | |
bf0fd768 CL |
1332 | case Opt_sec: |
1333 | string = match_strdup(args); | |
1334 | if (string == NULL) | |
1335 | goto out_nomem; | |
01060c89 | 1336 | rc = nfs_parse_security_flavors(string, mnt); |
bf0fd768 | 1337 | kfree(string); |
f45663ce | 1338 | if (!rc) { |
f45663ce CL |
1339 | dfprintk(MOUNT, "NFS: unrecognized " |
1340 | "security flavor\n"); | |
d23c45fd | 1341 | return 0; |
f45663ce | 1342 | } |
bf0fd768 CL |
1343 | break; |
1344 | case Opt_proto: | |
1345 | string = match_strdup(args); | |
1346 | if (string == NULL) | |
1347 | goto out_nomem; | |
1348 | token = match_token(string, | |
1349 | nfs_xprt_protocol_tokens, args); | |
bf0fd768 | 1350 | |
ee671b01 | 1351 | protofamily = AF_INET; |
bf0fd768 | 1352 | switch (token) { |
ee671b01 JL |
1353 | case Opt_xprt_udp6: |
1354 | protofamily = AF_INET6; | |
fdb66ff4 | 1355 | case Opt_xprt_udp: |
bf0fd768 | 1356 | mnt->flags &= ~NFS_MOUNT_TCP; |
0896a725 | 1357 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 | 1358 | break; |
ee671b01 JL |
1359 | case Opt_xprt_tcp6: |
1360 | protofamily = AF_INET6; | |
fdb66ff4 | 1361 | case Opt_xprt_tcp: |
bf0fd768 | 1362 | mnt->flags |= NFS_MOUNT_TCP; |
0896a725 | 1363 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1364 | break; |
2cf7ff7a TT |
1365 | case Opt_xprt_rdma: |
1366 | /* vector side protocols to TCP */ | |
1367 | mnt->flags |= NFS_MOUNT_TCP; | |
1368 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 1369 | xprt_load_transport(string); |
2cf7ff7a | 1370 | break; |
bf0fd768 | 1371 | default: |
f45663ce CL |
1372 | dfprintk(MOUNT, "NFS: unrecognized " |
1373 | "transport protocol\n"); | |
4223a4a1 | 1374 | kfree(string); |
d23c45fd | 1375 | return 0; |
bf0fd768 | 1376 | } |
c5cb09b6 | 1377 | kfree(string); |
bf0fd768 CL |
1378 | break; |
1379 | case Opt_mountproto: | |
1380 | string = match_strdup(args); | |
1381 | if (string == NULL) | |
1382 | goto out_nomem; | |
1383 | token = match_token(string, | |
1384 | nfs_xprt_protocol_tokens, args); | |
d508afb4 | 1385 | kfree(string); |
bf0fd768 | 1386 | |
ee671b01 | 1387 | mountfamily = AF_INET; |
bf0fd768 | 1388 | switch (token) { |
ee671b01 JL |
1389 | case Opt_xprt_udp6: |
1390 | mountfamily = AF_INET6; | |
fdb66ff4 | 1391 | case Opt_xprt_udp: |
0896a725 | 1392 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 | 1393 | break; |
ee671b01 JL |
1394 | case Opt_xprt_tcp6: |
1395 | mountfamily = AF_INET6; | |
fdb66ff4 | 1396 | case Opt_xprt_tcp: |
0896a725 | 1397 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1398 | break; |
2cf7ff7a | 1399 | case Opt_xprt_rdma: /* not used for side protocols */ |
bf0fd768 | 1400 | default: |
f45663ce CL |
1401 | dfprintk(MOUNT, "NFS: unrecognized " |
1402 | "transport protocol\n"); | |
d23c45fd | 1403 | return 0; |
bf0fd768 CL |
1404 | } |
1405 | break; | |
1406 | case Opt_addr: | |
1407 | string = match_strdup(args); | |
1408 | if (string == NULL) | |
1409 | goto out_nomem; | |
53a0b9c4 | 1410 | mnt->nfs_server.addrlen = |
90100b17 | 1411 | rpc_pton(&init_net, string, strlen(string), |
53a0b9c4 CL |
1412 | (struct sockaddr *) |
1413 | &mnt->nfs_server.address, | |
1414 | sizeof(mnt->nfs_server.address)); | |
bf0fd768 | 1415 | kfree(string); |
53a0b9c4 CL |
1416 | if (mnt->nfs_server.addrlen == 0) |
1417 | goto out_invalid_address; | |
bf0fd768 CL |
1418 | break; |
1419 | case Opt_clientaddr: | |
c5cb09b6 | 1420 | if (nfs_get_option_str(args, &mnt->client_address)) |
bf0fd768 | 1421 | goto out_nomem; |
bf0fd768 | 1422 | break; |
33832034 | 1423 | case Opt_mounthost: |
c5cb09b6 RL |
1424 | if (nfs_get_option_str(args, |
1425 | &mnt->mount_server.hostname)) | |
33832034 | 1426 | goto out_nomem; |
33832034 | 1427 | break; |
0ac83779 | 1428 | case Opt_mountaddr: |
bf0fd768 CL |
1429 | string = match_strdup(args); |
1430 | if (string == NULL) | |
1431 | goto out_nomem; | |
53a0b9c4 | 1432 | mnt->mount_server.addrlen = |
90100b17 | 1433 | rpc_pton(&init_net, string, strlen(string), |
53a0b9c4 CL |
1434 | (struct sockaddr *) |
1435 | &mnt->mount_server.address, | |
1436 | sizeof(mnt->mount_server.address)); | |
bf0fd768 | 1437 | kfree(string); |
53a0b9c4 CL |
1438 | if (mnt->mount_server.addrlen == 0) |
1439 | goto out_invalid_address; | |
bf0fd768 | 1440 | break; |
7973c1f1 TM |
1441 | case Opt_lookupcache: |
1442 | string = match_strdup(args); | |
1443 | if (string == NULL) | |
1444 | goto out_nomem; | |
1445 | token = match_token(string, | |
1446 | nfs_lookupcache_tokens, args); | |
1447 | kfree(string); | |
1448 | switch (token) { | |
1449 | case Opt_lookupcache_all: | |
1450 | mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); | |
1451 | break; | |
1452 | case Opt_lookupcache_positive: | |
1453 | mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1454 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; | |
1455 | break; | |
1456 | case Opt_lookupcache_none: | |
1457 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1458 | break; | |
1459 | default: | |
7973c1f1 TM |
1460 | dfprintk(MOUNT, "NFS: invalid " |
1461 | "lookupcache argument\n"); | |
d23c45fd | 1462 | return 0; |
7973c1f1 TM |
1463 | }; |
1464 | break; | |
a6d5ff64 | 1465 | case Opt_fscache_uniq: |
c5cb09b6 | 1466 | if (nfs_get_option_str(args, &mnt->fscache_uniq)) |
a6d5ff64 | 1467 | goto out_nomem; |
a6d5ff64 CL |
1468 | mnt->options |= NFS_OPTION_FSCACHE; |
1469 | break; | |
5eebde23 SJ |
1470 | case Opt_local_lock: |
1471 | string = match_strdup(args); | |
1472 | if (string == NULL) | |
1473 | goto out_nomem; | |
1474 | token = match_token(string, nfs_local_lock_tokens, | |
1475 | args); | |
1476 | kfree(string); | |
1477 | switch (token) { | |
1478 | case Opt_local_lock_all: | |
1479 | mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | | |
1480 | NFS_MOUNT_LOCAL_FCNTL); | |
1481 | break; | |
1482 | case Opt_local_lock_flock: | |
1483 | mnt->flags |= NFS_MOUNT_LOCAL_FLOCK; | |
1484 | break; | |
1485 | case Opt_local_lock_posix: | |
1486 | mnt->flags |= NFS_MOUNT_LOCAL_FCNTL; | |
1487 | break; | |
1488 | case Opt_local_lock_none: | |
1489 | mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | | |
1490 | NFS_MOUNT_LOCAL_FCNTL); | |
1491 | break; | |
1492 | default: | |
1493 | dfprintk(MOUNT, "NFS: invalid " | |
1494 | "local_lock argument\n"); | |
1495 | return 0; | |
1496 | }; | |
1497 | break; | |
bf0fd768 | 1498 | |
f45663ce CL |
1499 | /* |
1500 | * Special options | |
1501 | */ | |
1502 | case Opt_sloppy: | |
1503 | sloppy = 1; | |
1504 | dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); | |
1505 | break; | |
bf0fd768 CL |
1506 | case Opt_userspace: |
1507 | case Opt_deprecated: | |
d33e4dfe CL |
1508 | dfprintk(MOUNT, "NFS: ignoring mount option " |
1509 | "'%s'\n", p); | |
bf0fd768 CL |
1510 | break; |
1511 | ||
1512 | default: | |
d23c45fd | 1513 | invalid_option = 1; |
f45663ce CL |
1514 | dfprintk(MOUNT, "NFS: unrecognized mount option " |
1515 | "'%s'\n", p); | |
bf0fd768 CL |
1516 | } |
1517 | } | |
1518 | ||
d23c45fd CL |
1519 | if (!sloppy && invalid_option) |
1520 | return 0; | |
1521 | ||
ee671b01 JL |
1522 | /* |
1523 | * verify that any proto=/mountproto= options match the address | |
1524 | * familiies in the addr=/mountaddr= options. | |
1525 | */ | |
1526 | if (protofamily != AF_UNSPEC && | |
1527 | protofamily != mnt->nfs_server.address.ss_family) | |
1528 | goto out_proto_mismatch; | |
1529 | ||
1530 | if (mountfamily != AF_UNSPEC) { | |
1531 | if (mnt->mount_server.addrlen) { | |
1532 | if (mountfamily != mnt->mount_server.address.ss_family) | |
1533 | goto out_mountproto_mismatch; | |
1534 | } else { | |
1535 | if (mountfamily != mnt->nfs_server.address.ss_family) | |
1536 | goto out_mountproto_mismatch; | |
1537 | } | |
1538 | } | |
1539 | ||
bf0fd768 CL |
1540 | return 1; |
1541 | ||
ee671b01 JL |
1542 | out_mountproto_mismatch: |
1543 | printk(KERN_INFO "NFS: mount server address does not match mountproto= " | |
1544 | "option\n"); | |
1545 | return 0; | |
1546 | out_proto_mismatch: | |
1547 | printk(KERN_INFO "NFS: server address does not match proto= option\n"); | |
1548 | return 0; | |
53a0b9c4 CL |
1549 | out_invalid_address: |
1550 | printk(KERN_INFO "NFS: bad IP address specified: %s\n", p); | |
1551 | return 0; | |
d23c45fd | 1552 | out_invalid_value: |
53a0b9c4 | 1553 | printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); |
d23c45fd | 1554 | return 0; |
bf0fd768 CL |
1555 | out_nomem: |
1556 | printk(KERN_INFO "NFS: not enough memory to parse option\n"); | |
1557 | return 0; | |
f9c3a380 EP |
1558 | out_security_failure: |
1559 | free_secdata(secdata); | |
1560 | printk(KERN_INFO "NFS: security options invalid: %d\n", rc); | |
1561 | return 0; | |
bf0fd768 CL |
1562 | } |
1563 | ||
ec88f28d CL |
1564 | /* |
1565 | * Match the requested auth flavors with the list returned by | |
1566 | * the server. Returns zero and sets the mount's authentication | |
1567 | * flavor on success; returns -EACCES if server does not support | |
1568 | * the requested flavor. | |
1569 | */ | |
1570 | static int nfs_walk_authlist(struct nfs_parsed_mount_data *args, | |
1571 | struct nfs_mount_request *request) | |
1572 | { | |
1573 | unsigned int i, j, server_authlist_len = *(request->auth_flav_len); | |
1574 | ||
5eecfde6 CL |
1575 | /* |
1576 | * Certain releases of Linux's mountd return an empty | |
1577 | * flavor list. To prevent behavioral regression with | |
1578 | * these servers (ie. rejecting mounts that used to | |
1579 | * succeed), revert to pre-2.6.32 behavior (no checking) | |
1580 | * if the returned flavor list is empty. | |
1581 | */ | |
1582 | if (server_authlist_len == 0) | |
1583 | return 0; | |
1584 | ||
ec88f28d CL |
1585 | /* |
1586 | * We avoid sophisticated negotiating here, as there are | |
1587 | * plenty of cases where we can get it wrong, providing | |
1588 | * either too little or too much security. | |
1589 | * | |
1590 | * RFC 2623, section 2.7 suggests we SHOULD prefer the | |
1591 | * flavor listed first. However, some servers list | |
1592 | * AUTH_NULL first. Our caller plants AUTH_SYS, the | |
1593 | * preferred default, in args->auth_flavors[0] if user | |
1594 | * didn't specify sec= mount option. | |
1595 | */ | |
1596 | for (i = 0; i < args->auth_flavor_len; i++) | |
1597 | for (j = 0; j < server_authlist_len; j++) | |
1598 | if (args->auth_flavors[i] == request->auth_flavs[j]) { | |
1599 | dfprintk(MOUNT, "NFS: using auth flavor %d\n", | |
1600 | request->auth_flavs[j]); | |
1601 | args->auth_flavors[0] = request->auth_flavs[j]; | |
1602 | return 0; | |
1603 | } | |
1604 | ||
1605 | dfprintk(MOUNT, "NFS: server does not support requested auth flavor\n"); | |
1606 | nfs_umount(request); | |
1607 | return -EACCES; | |
1608 | } | |
1609 | ||
0076d7b7 CL |
1610 | /* |
1611 | * Use the remote server's MOUNT service to request the NFS file handle | |
1612 | * corresponding to the provided path. | |
1613 | */ | |
1614 | static int nfs_try_mount(struct nfs_parsed_mount_data *args, | |
1615 | struct nfs_fh *root_fh) | |
1616 | { | |
ec88f28d CL |
1617 | rpc_authflavor_t server_authlist[NFS_MAX_SECFLAVORS]; |
1618 | unsigned int server_authlist_len = ARRAY_SIZE(server_authlist); | |
c5d120f8 CL |
1619 | struct nfs_mount_request request = { |
1620 | .sap = (struct sockaddr *) | |
1621 | &args->mount_server.address, | |
1622 | .dirpath = args->nfs_server.export_path, | |
1623 | .protocol = args->mount_server.protocol, | |
1624 | .fh = root_fh, | |
50a737f8 | 1625 | .noresvport = args->flags & NFS_MOUNT_NORESVPORT, |
ec88f28d CL |
1626 | .auth_flav_len = &server_authlist_len, |
1627 | .auth_flavs = server_authlist, | |
6d59b8d5 | 1628 | .net = args->net, |
c5d120f8 | 1629 | }; |
4c568017 | 1630 | int status; |
0076d7b7 CL |
1631 | |
1632 | if (args->mount_server.version == 0) { | |
8a6e5deb TM |
1633 | switch (args->version) { |
1634 | default: | |
1635 | args->mount_server.version = NFS_MNT3_VERSION; | |
1636 | break; | |
1637 | case 2: | |
1638 | args->mount_server.version = NFS_MNT_VERSION; | |
1639 | } | |
0076d7b7 | 1640 | } |
c5d120f8 | 1641 | request.version = args->mount_server.version; |
0076d7b7 | 1642 | |
33832034 | 1643 | if (args->mount_server.hostname) |
c5d120f8 | 1644 | request.hostname = args->mount_server.hostname; |
33832034 | 1645 | else |
c5d120f8 | 1646 | request.hostname = args->nfs_server.hostname; |
33832034 | 1647 | |
0076d7b7 CL |
1648 | /* |
1649 | * Construct the mount server's address. | |
1650 | */ | |
4c568017 | 1651 | if (args->mount_server.address.ss_family == AF_UNSPEC) { |
c5d120f8 | 1652 | memcpy(request.sap, &args->nfs_server.address, |
4c568017 CL |
1653 | args->nfs_server.addrlen); |
1654 | args->mount_server.addrlen = args->nfs_server.addrlen; | |
1655 | } | |
c5d120f8 | 1656 | request.salen = args->mount_server.addrlen; |
f5855fec | 1657 | nfs_set_port(request.sap, &args->mount_server.port, 0); |
0076d7b7 CL |
1658 | |
1659 | /* | |
1660 | * Now ask the mount server to map our export path | |
1661 | * to a file handle. | |
1662 | */ | |
c5d120f8 | 1663 | status = nfs_mount(&request); |
ec88f28d CL |
1664 | if (status != 0) { |
1665 | dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n", | |
1666 | request.hostname, status); | |
1667 | return status; | |
1668 | } | |
0076d7b7 | 1669 | |
ec88f28d CL |
1670 | /* |
1671 | * MNTv1 (NFSv2) does not support auth flavor negotiation. | |
1672 | */ | |
1673 | if (args->mount_server.version != NFS_MNT3_VERSION) | |
1674 | return 0; | |
1675 | return nfs_walk_authlist(args, &request); | |
0076d7b7 CL |
1676 | } |
1677 | ||
c12bacec RL |
1678 | /* |
1679 | * Split "dev_name" into "hostname:export_path". | |
1680 | * | |
1681 | * The leftmost colon demarks the split between the server's hostname | |
1682 | * and the export path. If the hostname starts with a left square | |
1683 | * bracket, then it may contain colons. | |
1684 | * | |
1685 | * Note: caller frees hostname and export path, even on error. | |
1686 | */ | |
1687 | static int nfs_parse_devname(const char *dev_name, | |
1688 | char **hostname, size_t maxnamlen, | |
1689 | char **export_path, size_t maxpathlen) | |
dc045898 CL |
1690 | { |
1691 | size_t len; | |
c12bacec | 1692 | char *end; |
dc045898 | 1693 | |
c12bacec RL |
1694 | /* Is the host name protected with square brakcets? */ |
1695 | if (*dev_name == '[') { | |
1696 | end = strchr(++dev_name, ']'); | |
1697 | if (end == NULL || end[1] != ':') | |
dc045898 | 1698 | goto out_bad_devname; |
dc045898 | 1699 | |
c12bacec RL |
1700 | len = end - dev_name; |
1701 | end++; | |
1702 | } else { | |
1703 | char *comma; | |
dc045898 | 1704 | |
c12bacec RL |
1705 | end = strchr(dev_name, ':'); |
1706 | if (end == NULL) | |
1707 | goto out_bad_devname; | |
1708 | len = end - dev_name; | |
d1aa0825 | 1709 | |
c12bacec RL |
1710 | /* kill possible hostname list: not supported */ |
1711 | comma = strchr(dev_name, ','); | |
1712 | if (comma != NULL && comma < end) | |
1713 | *comma = 0; | |
1714 | } | |
d1aa0825 | 1715 | |
d1aa0825 CL |
1716 | if (len > maxnamlen) |
1717 | goto out_hostname; | |
1718 | ||
1719 | /* N.B. caller will free nfs_server.hostname in all cases */ | |
c12bacec | 1720 | *hostname = kstrndup(dev_name, len, GFP_KERNEL); |
d1aa0825 CL |
1721 | if (*hostname == NULL) |
1722 | goto out_nomem; | |
c12bacec | 1723 | len = strlen(++end); |
d1aa0825 CL |
1724 | if (len > maxpathlen) |
1725 | goto out_path; | |
1726 | *export_path = kstrndup(end, len, GFP_KERNEL); | |
1727 | if (!*export_path) | |
1728 | goto out_nomem; | |
1729 | ||
c12bacec | 1730 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path); |
d1aa0825 CL |
1731 | return 0; |
1732 | ||
1733 | out_bad_devname: | |
1734 | dfprintk(MOUNT, "NFS: device name not in host:path format\n"); | |
1735 | return -EINVAL; | |
1736 | ||
1737 | out_nomem: | |
1738 | dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); | |
1739 | return -ENOMEM; | |
1740 | ||
1741 | out_hostname: | |
1742 | dfprintk(MOUNT, "NFS: server hostname too long\n"); | |
1743 | return -ENAMETOOLONG; | |
1744 | ||
1745 | out_path: | |
1746 | dfprintk(MOUNT, "NFS: export pathname too long\n"); | |
1747 | return -ENAMETOOLONG; | |
1748 | } | |
1749 | ||
f7b422b1 | 1750 | /* |
54ceac45 DH |
1751 | * Validate the NFS2/NFS3 mount data |
1752 | * - fills in the mount root filehandle | |
136d558c CL |
1753 | * |
1754 | * For option strings, user space handles the following behaviors: | |
1755 | * | |
1756 | * + DNS: mapping server host name to IP address ("addr=" option) | |
1757 | * | |
1758 | * + failure mode: how to behave if a mount request can't be handled | |
1759 | * immediately ("fg/bg" option) | |
1760 | * | |
1761 | * + retry: how often to retry a mount request ("retry=" option) | |
1762 | * | |
1763 | * + breaking back: trying proto=udp after proto=tcp, v2 after v3, | |
1764 | * mountproto=tcp after mountproto=udp, and so on | |
f7b422b1 | 1765 | */ |
2283f8d6 TT |
1766 | static int nfs_validate_mount_data(void *options, |
1767 | struct nfs_parsed_mount_data *args, | |
136d558c CL |
1768 | struct nfs_fh *mntfh, |
1769 | const char *dev_name) | |
f7b422b1 | 1770 | { |
2283f8d6 | 1771 | struct nfs_mount_data *data = (struct nfs_mount_data *)options; |
4cfd74fc | 1772 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; |
136d558c | 1773 | |
5df36e78 CL |
1774 | if (data == NULL) |
1775 | goto out_no_data; | |
f7b422b1 | 1776 | |
54ceac45 | 1777 | switch (data->version) { |
5df36e78 CL |
1778 | case 1: |
1779 | data->namlen = 0; | |
1780 | case 2: | |
1781 | data->bsize = 0; | |
1782 | case 3: | |
1783 | if (data->flags & NFS_MOUNT_VER3) | |
1784 | goto out_no_v3; | |
1785 | data->root.size = NFS2_FHSIZE; | |
1786 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
1787 | case 4: | |
1788 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1789 | goto out_no_sec; | |
1790 | case 5: | |
1791 | memset(data->context, 0, sizeof(data->context)); | |
1792 | case 6: | |
b7e24457 TM |
1793 | if (data->flags & NFS_MOUNT_VER3) { |
1794 | if (data->root.size > NFS3_FHSIZE || data->root.size == 0) | |
1795 | goto out_invalid_fh; | |
5df36e78 | 1796 | mntfh->size = data->root.size; |
764302cc CL |
1797 | args->version = 3; |
1798 | } else { | |
5df36e78 | 1799 | mntfh->size = NFS2_FHSIZE; |
764302cc CL |
1800 | args->version = 2; |
1801 | } | |
5df36e78 | 1802 | |
5df36e78 CL |
1803 | |
1804 | memcpy(mntfh->data, data->root.data, mntfh->size); | |
1805 | if (mntfh->size < sizeof(mntfh->data)) | |
1806 | memset(mntfh->data + mntfh->size, 0, | |
1807 | sizeof(mntfh->data) - mntfh->size); | |
6e88e061 | 1808 | |
2283f8d6 TT |
1809 | /* |
1810 | * Translate to nfs_parsed_mount_data, which nfs_fill_super | |
1811 | * can deal with. | |
1812 | */ | |
ff3525a5 | 1813 | args->flags = data->flags & NFS_MOUNT_FLAGMASK; |
d5eff1a3 | 1814 | args->flags |= NFS_MOUNT_LEGACY_INTERFACE; |
2283f8d6 TT |
1815 | args->rsize = data->rsize; |
1816 | args->wsize = data->wsize; | |
2283f8d6 TT |
1817 | args->timeo = data->timeo; |
1818 | args->retrans = data->retrans; | |
1819 | args->acregmin = data->acregmin; | |
1820 | args->acregmax = data->acregmax; | |
1821 | args->acdirmin = data->acdirmin; | |
1822 | args->acdirmax = data->acdirmax; | |
4c568017 | 1823 | |
4cfd74fc | 1824 | memcpy(sap, &data->addr, sizeof(data->addr)); |
4c568017 | 1825 | args->nfs_server.addrlen = sizeof(data->addr); |
4cfd74fc | 1826 | if (!nfs_verify_server_address(sap)) |
4c568017 CL |
1827 | goto out_no_address; |
1828 | ||
2283f8d6 | 1829 | if (!(data->flags & NFS_MOUNT_TCP)) |
0896a725 | 1830 | args->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
2283f8d6 TT |
1831 | /* N.B. caller will free nfs_server.hostname in all cases */ |
1832 | args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); | |
1833 | args->namlen = data->namlen; | |
1834 | args->bsize = data->bsize; | |
dd07c947 CL |
1835 | |
1836 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1837 | args->auth_flavors[0] = data->pseudoflavor; | |
63649bd7 CG |
1838 | if (!args->nfs_server.hostname) |
1839 | goto out_nomem; | |
f9c3a380 | 1840 | |
5eebde23 SJ |
1841 | if (!(data->flags & NFS_MOUNT_NONLM)) |
1842 | args->flags &= ~(NFS_MOUNT_LOCAL_FLOCK| | |
1843 | NFS_MOUNT_LOCAL_FCNTL); | |
1844 | else | |
1845 | args->flags |= (NFS_MOUNT_LOCAL_FLOCK| | |
1846 | NFS_MOUNT_LOCAL_FCNTL); | |
f9c3a380 EP |
1847 | /* |
1848 | * The legacy version 6 binary mount data from userspace has a | |
1849 | * field used only to transport selinux information into the | |
1850 | * the kernel. To continue to support that functionality we | |
1851 | * have a touch of selinux knowledge here in the NFS code. The | |
1852 | * userspace code converted context=blah to just blah so we are | |
1853 | * converting back to the full string selinux understands. | |
1854 | */ | |
1855 | if (data->context[0]){ | |
1856 | #ifdef CONFIG_SECURITY_SELINUX | |
1857 | int rc; | |
1858 | char *opts_str = kmalloc(sizeof(data->context) + 8, GFP_KERNEL); | |
1859 | if (!opts_str) | |
1860 | return -ENOMEM; | |
1861 | strcpy(opts_str, "context="); | |
1862 | data->context[NFS_MAX_CONTEXT_LEN] = '\0'; | |
1863 | strcat(opts_str, &data->context[0]); | |
1864 | rc = security_sb_parse_opts_str(opts_str, &args->lsm_opts); | |
1865 | kfree(opts_str); | |
1866 | if (rc) | |
1867 | return rc; | |
1868 | #else | |
1869 | return -EINVAL; | |
1870 | #endif | |
1871 | } | |
1872 | ||
5df36e78 | 1873 | break; |
136d558c | 1874 | default: { |
136d558c | 1875 | int status; |
136d558c | 1876 | |
2283f8d6 TT |
1877 | if (nfs_parse_mount_options((char *)options, args) == 0) |
1878 | return -EINVAL; | |
136d558c | 1879 | |
4cfd74fc | 1880 | if (!nfs_verify_server_address(sap)) |
6e88e061 CL |
1881 | goto out_no_address; |
1882 | ||
764302cc CL |
1883 | if (args->version == 4) |
1884 | #ifdef CONFIG_NFS_V4 | |
1885 | return nfs4_validate_text_mount_data(options, | |
1886 | args, dev_name); | |
1887 | #else | |
1888 | goto out_v4_not_compiled; | |
1889 | #endif | |
1890 | ||
f5855fec | 1891 | nfs_set_port(sap, &args->nfs_server.port, 0); |
ed596a8a | 1892 | |
259875ef TM |
1893 | nfs_set_mount_transport_protocol(args); |
1894 | ||
dc045898 CL |
1895 | status = nfs_parse_devname(dev_name, |
1896 | &args->nfs_server.hostname, | |
1897 | PAGE_SIZE, | |
1898 | &args->nfs_server.export_path, | |
1899 | NFS_MAXPATHLEN); | |
1900 | if (!status) | |
1901 | status = nfs_try_mount(args, mntfh); | |
136d558c | 1902 | |
dc045898 CL |
1903 | kfree(args->nfs_server.export_path); |
1904 | args->nfs_server.export_path = NULL; | |
136d558c | 1905 | |
136d558c | 1906 | if (status) |
fdc6e2c8 | 1907 | return status; |
136d558c | 1908 | |
136d558c CL |
1909 | break; |
1910 | } | |
f7b422b1 | 1911 | } |
54ceac45 DH |
1912 | |
1913 | #ifndef CONFIG_NFS_V3 | |
8a6e5deb | 1914 | if (args->version == 3) |
5df36e78 CL |
1915 | goto out_v3_not_compiled; |
1916 | #endif /* !CONFIG_NFS_V3 */ | |
f7b422b1 | 1917 | |
5df36e78 | 1918 | return 0; |
f7b422b1 | 1919 | |
5df36e78 CL |
1920 | out_no_data: |
1921 | dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); | |
1922 | return -EINVAL; | |
54ceac45 | 1923 | |
5df36e78 CL |
1924 | out_no_v3: |
1925 | dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", | |
1926 | data->version); | |
1927 | return -EINVAL; | |
f7b422b1 | 1928 | |
5df36e78 CL |
1929 | out_no_sec: |
1930 | dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); | |
1931 | return -EINVAL; | |
1932 | ||
5df36e78 CL |
1933 | #ifndef CONFIG_NFS_V3 |
1934 | out_v3_not_compiled: | |
1935 | dfprintk(MOUNT, "NFS: NFSv3 is not compiled into kernel\n"); | |
1936 | return -EPROTONOSUPPORT; | |
1937 | #endif /* !CONFIG_NFS_V3 */ | |
1938 | ||
764302cc CL |
1939 | #ifndef CONFIG_NFS_V4 |
1940 | out_v4_not_compiled: | |
1941 | dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); | |
1942 | return -EPROTONOSUPPORT; | |
1943 | #endif /* !CONFIG_NFS_V4 */ | |
1944 | ||
63649bd7 CG |
1945 | out_nomem: |
1946 | dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); | |
1947 | return -ENOMEM; | |
1948 | ||
5df36e78 CL |
1949 | out_no_address: |
1950 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); | |
1951 | return -EINVAL; | |
1952 | ||
1953 | out_invalid_fh: | |
1954 | dfprintk(MOUNT, "NFS: invalid root filehandle\n"); | |
1955 | return -EINVAL; | |
f7b422b1 DH |
1956 | } |
1957 | ||
48b605f8 JL |
1958 | static int |
1959 | nfs_compare_remount_data(struct nfs_server *nfss, | |
1960 | struct nfs_parsed_mount_data *data) | |
1961 | { | |
1962 | if (data->flags != nfss->flags || | |
1963 | data->rsize != nfss->rsize || | |
1964 | data->wsize != nfss->wsize || | |
1965 | data->retrans != nfss->client->cl_timeout->to_retries || | |
1966 | data->auth_flavors[0] != nfss->client->cl_auth->au_flavor || | |
1967 | data->acregmin != nfss->acregmin / HZ || | |
1968 | data->acregmax != nfss->acregmax / HZ || | |
1969 | data->acdirmin != nfss->acdirmin / HZ || | |
1970 | data->acdirmax != nfss->acdirmax / HZ || | |
1971 | data->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) || | |
bcd2ea17 | 1972 | data->nfs_server.port != nfss->port || |
48b605f8 | 1973 | data->nfs_server.addrlen != nfss->nfs_client->cl_addrlen || |
a1be9eee SR |
1974 | !rpc_cmp_addr((struct sockaddr *)&data->nfs_server.address, |
1975 | (struct sockaddr *)&nfss->nfs_client->cl_addr)) | |
48b605f8 JL |
1976 | return -EINVAL; |
1977 | ||
1978 | return 0; | |
1979 | } | |
1980 | ||
1981 | static int | |
1982 | nfs_remount(struct super_block *sb, int *flags, char *raw_data) | |
1983 | { | |
1984 | int error; | |
1985 | struct nfs_server *nfss = sb->s_fs_info; | |
1986 | struct nfs_parsed_mount_data *data; | |
1987 | struct nfs_mount_data *options = (struct nfs_mount_data *)raw_data; | |
1988 | struct nfs4_mount_data *options4 = (struct nfs4_mount_data *)raw_data; | |
cd100725 | 1989 | u32 nfsvers = nfss->nfs_client->rpc_ops->version; |
48b605f8 JL |
1990 | |
1991 | /* | |
1992 | * Userspace mount programs that send binary options generally send | |
1993 | * them populated with default values. We have no way to know which | |
1994 | * ones were explicitly specified. Fall back to legacy behavior and | |
1995 | * just return success. | |
1996 | */ | |
31c94469 MZ |
1997 | if ((nfsvers == 4 && (!options4 || options4->version == 1)) || |
1998 | (nfsvers <= 3 && (!options || (options->version >= 1 && | |
1999 | options->version <= 6)))) | |
48b605f8 JL |
2000 | return 0; |
2001 | ||
2002 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2003 | if (data == NULL) | |
2004 | return -ENOMEM; | |
2005 | ||
2006 | /* fill out struct with values from existing mount */ | |
2007 | data->flags = nfss->flags; | |
2008 | data->rsize = nfss->rsize; | |
2009 | data->wsize = nfss->wsize; | |
2010 | data->retrans = nfss->client->cl_timeout->to_retries; | |
2011 | data->auth_flavors[0] = nfss->client->cl_auth->au_flavor; | |
2012 | data->acregmin = nfss->acregmin / HZ; | |
2013 | data->acregmax = nfss->acregmax / HZ; | |
2014 | data->acdirmin = nfss->acdirmin / HZ; | |
2015 | data->acdirmax = nfss->acdirmax / HZ; | |
2016 | data->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; | |
bcd2ea17 | 2017 | data->nfs_server.port = nfss->port; |
48b605f8 JL |
2018 | data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; |
2019 | memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr, | |
2020 | data->nfs_server.addrlen); | |
2021 | ||
2022 | /* overwrite those values with any that were specified */ | |
2023 | error = nfs_parse_mount_options((char *)options, data); | |
2024 | if (error < 0) | |
2025 | goto out; | |
2026 | ||
26c4c170 JL |
2027 | /* |
2028 | * noac is a special case. It implies -o sync, but that's not | |
2029 | * necessarily reflected in the mtab options. do_remount_sb | |
2030 | * will clear MS_SYNCHRONOUS if -o sync wasn't specified in the | |
2031 | * remount options, so we have to explicitly reset it. | |
2032 | */ | |
2033 | if (data->flags & NFS_MOUNT_NOAC) | |
2034 | *flags |= MS_SYNCHRONOUS; | |
2035 | ||
48b605f8 JL |
2036 | /* compare new mount options with old ones */ |
2037 | error = nfs_compare_remount_data(nfss, data); | |
2038 | out: | |
2039 | kfree(data); | |
2040 | return error; | |
2041 | } | |
2042 | ||
f7b422b1 | 2043 | /* |
54ceac45 | 2044 | * Initialise the common bits of the superblock |
f7b422b1 | 2045 | */ |
54ceac45 | 2046 | static inline void nfs_initialise_sb(struct super_block *sb) |
f7b422b1 | 2047 | { |
54ceac45 | 2048 | struct nfs_server *server = NFS_SB(sb); |
5006a76c | 2049 | |
54ceac45 | 2050 | sb->s_magic = NFS_SUPER_MAGIC; |
f7b422b1 | 2051 | |
54ceac45 DH |
2052 | /* We probably want something more informative here */ |
2053 | snprintf(sb->s_id, sizeof(sb->s_id), | |
2054 | "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev)); | |
5006a76c | 2055 | |
54ceac45 DH |
2056 | if (sb->s_blocksize == 0) |
2057 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
2058 | &sb->s_blocksize_bits); | |
f7b422b1 | 2059 | |
32a88aa1 JA |
2060 | sb->s_bdi = &server->backing_dev_info; |
2061 | ||
54ceac45 | 2062 | nfs_super_set_maxbytes(sb, server->maxfilesize); |
f7b422b1 DH |
2063 | } |
2064 | ||
2065 | /* | |
54ceac45 | 2066 | * Finish setting up an NFS2/3 superblock |
f7b422b1 | 2067 | */ |
2283f8d6 TT |
2068 | static void nfs_fill_super(struct super_block *sb, |
2069 | struct nfs_parsed_mount_data *data) | |
f7b422b1 DH |
2070 | { |
2071 | struct nfs_server *server = NFS_SB(sb); | |
5006a76c | 2072 | |
54ceac45 DH |
2073 | sb->s_blocksize_bits = 0; |
2074 | sb->s_blocksize = 0; | |
2075 | if (data->bsize) | |
2076 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); | |
f7b422b1 | 2077 | |
8a6e5deb | 2078 | if (server->nfs_client->rpc_ops->version == 3) { |
54ceac45 DH |
2079 | /* The VFS shouldn't apply the umask to mode bits. We will do |
2080 | * so ourselves when necessary. | |
2081 | */ | |
2082 | sb->s_flags |= MS_POSIXACL; | |
2083 | sb->s_time_gran = 1; | |
816724e6 | 2084 | } |
54ceac45 DH |
2085 | |
2086 | sb->s_op = &nfs_sops; | |
2087 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
2088 | } |
2089 | ||
2090 | /* | |
54ceac45 | 2091 | * Finish setting up a cloned NFS2/3 superblock |
f7b422b1 | 2092 | */ |
54ceac45 DH |
2093 | static void nfs_clone_super(struct super_block *sb, |
2094 | const struct super_block *old_sb) | |
f7b422b1 | 2095 | { |
54ceac45 DH |
2096 | struct nfs_server *server = NFS_SB(sb); |
2097 | ||
2098 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; | |
2099 | sb->s_blocksize = old_sb->s_blocksize; | |
2100 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 2101 | |
8a6e5deb | 2102 | if (server->nfs_client->rpc_ops->version == 3) { |
54ceac45 DH |
2103 | /* The VFS shouldn't apply the umask to mode bits. We will do |
2104 | * so ourselves when necessary. | |
f7b422b1 DH |
2105 | */ |
2106 | sb->s_flags |= MS_POSIXACL; | |
f7b422b1 | 2107 | sb->s_time_gran = 1; |
f7b422b1 DH |
2108 | } |
2109 | ||
54ceac45 DH |
2110 | sb->s_op = old_sb->s_op; |
2111 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
2112 | } |
2113 | ||
275a5d24 TM |
2114 | static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags) |
2115 | { | |
2116 | const struct nfs_server *a = s->s_fs_info; | |
2117 | const struct rpc_clnt *clnt_a = a->client; | |
2118 | const struct rpc_clnt *clnt_b = b->client; | |
2119 | ||
2120 | if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK)) | |
2121 | goto Ebusy; | |
2122 | if (a->nfs_client != b->nfs_client) | |
2123 | goto Ebusy; | |
2124 | if (a->flags != b->flags) | |
2125 | goto Ebusy; | |
2126 | if (a->wsize != b->wsize) | |
2127 | goto Ebusy; | |
2128 | if (a->rsize != b->rsize) | |
2129 | goto Ebusy; | |
2130 | if (a->acregmin != b->acregmin) | |
2131 | goto Ebusy; | |
2132 | if (a->acregmax != b->acregmax) | |
2133 | goto Ebusy; | |
2134 | if (a->acdirmin != b->acdirmin) | |
2135 | goto Ebusy; | |
2136 | if (a->acdirmax != b->acdirmax) | |
2137 | goto Ebusy; | |
2138 | if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) | |
2139 | goto Ebusy; | |
e89a5a43 | 2140 | return 1; |
275a5d24 | 2141 | Ebusy: |
e89a5a43 TM |
2142 | return 0; |
2143 | } | |
2144 | ||
2145 | struct nfs_sb_mountdata { | |
2146 | struct nfs_server *server; | |
2147 | int mntflags; | |
2148 | }; | |
2149 | ||
2150 | static int nfs_set_super(struct super_block *s, void *data) | |
2151 | { | |
2152 | struct nfs_sb_mountdata *sb_mntdata = data; | |
2153 | struct nfs_server *server = sb_mntdata->server; | |
2154 | int ret; | |
2155 | ||
2156 | s->s_flags = sb_mntdata->mntflags; | |
2157 | s->s_fs_info = server; | |
8b244ff2 | 2158 | s->s_d_op = server->nfs_client->rpc_ops->dentry_ops; |
e89a5a43 TM |
2159 | ret = set_anon_super(s, server); |
2160 | if (ret == 0) | |
2161 | server->s_dev = s->s_dev; | |
2162 | return ret; | |
2163 | } | |
2164 | ||
fd00a8ff CL |
2165 | static int nfs_compare_super_address(struct nfs_server *server1, |
2166 | struct nfs_server *server2) | |
2167 | { | |
2168 | struct sockaddr *sap1, *sap2; | |
2169 | ||
2170 | sap1 = (struct sockaddr *)&server1->nfs_client->cl_addr; | |
2171 | sap2 = (struct sockaddr *)&server2->nfs_client->cl_addr; | |
2172 | ||
2173 | if (sap1->sa_family != sap2->sa_family) | |
2174 | return 0; | |
2175 | ||
2176 | switch (sap1->sa_family) { | |
2177 | case AF_INET: { | |
2178 | struct sockaddr_in *sin1 = (struct sockaddr_in *)sap1; | |
2179 | struct sockaddr_in *sin2 = (struct sockaddr_in *)sap2; | |
2180 | if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) | |
2181 | return 0; | |
2182 | if (sin1->sin_port != sin2->sin_port) | |
2183 | return 0; | |
2184 | break; | |
2185 | } | |
2186 | case AF_INET6: { | |
2187 | struct sockaddr_in6 *sin1 = (struct sockaddr_in6 *)sap1; | |
2188 | struct sockaddr_in6 *sin2 = (struct sockaddr_in6 *)sap2; | |
2189 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) | |
2190 | return 0; | |
2191 | if (sin1->sin6_port != sin2->sin6_port) | |
2192 | return 0; | |
2193 | break; | |
2194 | } | |
2195 | default: | |
2196 | return 0; | |
2197 | } | |
2198 | ||
2199 | return 1; | |
2200 | } | |
2201 | ||
e89a5a43 TM |
2202 | static int nfs_compare_super(struct super_block *sb, void *data) |
2203 | { | |
2204 | struct nfs_sb_mountdata *sb_mntdata = data; | |
2205 | struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb); | |
2206 | int mntflags = sb_mntdata->mntflags; | |
2207 | ||
fd00a8ff | 2208 | if (!nfs_compare_super_address(old, server)) |
e89a5a43 TM |
2209 | return 0; |
2210 | /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */ | |
2211 | if (old->flags & NFS_MOUNT_UNSHARED) | |
2212 | return 0; | |
2213 | if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0) | |
2214 | return 0; | |
2215 | return nfs_compare_mount_options(sb, server, mntflags); | |
275a5d24 TM |
2216 | } |
2217 | ||
fa799759 MS |
2218 | static int nfs_bdi_register(struct nfs_server *server) |
2219 | { | |
2220 | return bdi_register_dev(&server->backing_dev_info, server->s_dev); | |
2221 | } | |
2222 | ||
01194981 AV |
2223 | static struct dentry *nfs_fs_mount(struct file_system_type *fs_type, |
2224 | int flags, const char *dev_name, void *raw_data) | |
f7b422b1 | 2225 | { |
f7b422b1 DH |
2226 | struct nfs_server *server = NULL; |
2227 | struct super_block *s; | |
33852a1f TM |
2228 | struct nfs_parsed_mount_data *data; |
2229 | struct nfs_fh *mntfh; | |
01194981 | 2230 | struct dentry *mntroot = ERR_PTR(-ENOMEM); |
75180df2 | 2231 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2232 | struct nfs_sb_mountdata sb_mntdata = { |
2233 | .mntflags = flags, | |
2234 | }; | |
01194981 | 2235 | int error; |
33852a1f | 2236 | |
1e657bd5 | 2237 | data = nfs_alloc_parsed_mount_data(NFS_DEFAULT_VERSION); |
b157b06c | 2238 | mntfh = nfs_alloc_fhandle(); |
33852a1f | 2239 | if (data == NULL || mntfh == NULL) |
8a0d551a | 2240 | goto out; |
f9c3a380 | 2241 | |
54ceac45 | 2242 | /* Validate the mount data */ |
33852a1f | 2243 | error = nfs_validate_mount_data(raw_data, data, mntfh, dev_name); |
01194981 AV |
2244 | if (error < 0) { |
2245 | mntroot = ERR_PTR(error); | |
0655960f | 2246 | goto out; |
01194981 | 2247 | } |
f7b422b1 | 2248 | |
764302cc CL |
2249 | #ifdef CONFIG_NFS_V4 |
2250 | if (data->version == 4) { | |
01194981 | 2251 | mntroot = nfs4_try_mount(flags, dev_name, data); |
764302cc CL |
2252 | goto out; |
2253 | } | |
2254 | #endif /* CONFIG_NFS_V4 */ | |
2255 | ||
54ceac45 | 2256 | /* Get a volume representation */ |
33852a1f | 2257 | server = nfs_create_server(data, mntfh); |
54ceac45 | 2258 | if (IS_ERR(server)) { |
01194981 | 2259 | mntroot = ERR_CAST(server); |
0655960f | 2260 | goto out; |
f7b422b1 | 2261 | } |
e89a5a43 | 2262 | sb_mntdata.server = server; |
f7b422b1 | 2263 | |
75180df2 TM |
2264 | if (server->flags & NFS_MOUNT_UNSHARED) |
2265 | compare_super = NULL; | |
2266 | ||
fb2088cc SP |
2267 | /* -o noac implies -o sync */ |
2268 | if (server->flags & NFS_MOUNT_NOAC) | |
2269 | sb_mntdata.mntflags |= MS_SYNCHRONOUS; | |
2270 | ||
54ceac45 | 2271 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 2272 | s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 | 2273 | if (IS_ERR(s)) { |
01194981 | 2274 | mntroot = ERR_CAST(s); |
54ceac45 | 2275 | goto out_err_nosb; |
816724e6 TM |
2276 | } |
2277 | ||
54ceac45 DH |
2278 | if (s->s_fs_info != server) { |
2279 | nfs_free_server(server); | |
2280 | server = NULL; | |
fa799759 MS |
2281 | } else { |
2282 | error = nfs_bdi_register(server); | |
01194981 AV |
2283 | if (error) { |
2284 | mntroot = ERR_PTR(error); | |
cfbc0683 | 2285 | goto error_splat_bdi; |
01194981 | 2286 | } |
54ceac45 | 2287 | } |
f7b422b1 | 2288 | |
54ceac45 DH |
2289 | if (!s->s_root) { |
2290 | /* initial superblock/root creation */ | |
33852a1f | 2291 | nfs_fill_super(s, data); |
160bc160 | 2292 | nfs_fscache_get_super_cookie(s, data->fscache_uniq, NULL); |
54ceac45 | 2293 | } |
f7b422b1 | 2294 | |
0d5839ad | 2295 | mntroot = nfs_get_root(s, mntfh, dev_name); |
01194981 | 2296 | if (IS_ERR(mntroot)) |
54ceac45 | 2297 | goto error_splat_super; |
816724e6 | 2298 | |
33852a1f | 2299 | error = security_sb_set_mnt_opts(s, &data->lsm_opts); |
f9c3a380 EP |
2300 | if (error) |
2301 | goto error_splat_root; | |
2302 | ||
54ceac45 | 2303 | s->s_flags |= MS_ACTIVE; |
0655960f CL |
2304 | |
2305 | out: | |
8a0d551a | 2306 | nfs_free_parsed_mount_data(data); |
b157b06c | 2307 | nfs_free_fhandle(mntfh); |
01194981 | 2308 | return mntroot; |
816724e6 | 2309 | |
54ceac45 DH |
2310 | out_err_nosb: |
2311 | nfs_free_server(server); | |
0655960f | 2312 | goto out; |
54ceac45 | 2313 | |
f9c3a380 EP |
2314 | error_splat_root: |
2315 | dput(mntroot); | |
01194981 | 2316 | mntroot = ERR_PTR(error); |
54ceac45 | 2317 | error_splat_super: |
cfbc0683 N |
2318 | if (server && !s->s_root) |
2319 | bdi_unregister(&server->backing_dev_info); | |
2320 | error_splat_bdi: | |
6f5bbff9 | 2321 | deactivate_locked_super(s); |
0655960f | 2322 | goto out; |
f7b422b1 DH |
2323 | } |
2324 | ||
387c149b TM |
2325 | /* |
2326 | * Ensure that we unregister the bdi before kill_anon_super | |
2327 | * releases the device name | |
2328 | */ | |
2329 | static void nfs_put_super(struct super_block *s) | |
2330 | { | |
2331 | struct nfs_server *server = NFS_SB(s); | |
2332 | ||
2333 | bdi_unregister(&server->backing_dev_info); | |
2334 | } | |
2335 | ||
54ceac45 DH |
2336 | /* |
2337 | * Destroy an NFS2/3 superblock | |
2338 | */ | |
f7b422b1 DH |
2339 | static void nfs_kill_super(struct super_block *s) |
2340 | { | |
2341 | struct nfs_server *server = NFS_SB(s); | |
2342 | ||
2343 | kill_anon_super(s); | |
08734048 | 2344 | nfs_fscache_release_super_cookie(s); |
54ceac45 | 2345 | nfs_free_server(server); |
f7b422b1 DH |
2346 | } |
2347 | ||
54ceac45 DH |
2348 | /* |
2349 | * Clone an NFS2/3 server record on xdev traversal (FSID-change) | |
2350 | */ | |
31f43471 AV |
2351 | static struct dentry * |
2352 | nfs_xdev_mount(struct file_system_type *fs_type, int flags, | |
2353 | const char *dev_name, void *raw_data) | |
f7b422b1 DH |
2354 | { |
2355 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
2356 | struct super_block *s; |
2357 | struct nfs_server *server; | |
2358 | struct dentry *mntroot; | |
75180df2 | 2359 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2360 | struct nfs_sb_mountdata sb_mntdata = { |
2361 | .mntflags = flags, | |
2362 | }; | |
54ceac45 | 2363 | int error; |
f7b422b1 | 2364 | |
31f43471 | 2365 | dprintk("--> nfs_xdev_mount()\n"); |
f7b422b1 | 2366 | |
54ceac45 DH |
2367 | /* create a new volume representation */ |
2368 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
2369 | if (IS_ERR(server)) { | |
2370 | error = PTR_ERR(server); | |
2371 | goto out_err_noserver; | |
2372 | } | |
e89a5a43 | 2373 | sb_mntdata.server = server; |
8fa5c000 | 2374 | |
75180df2 TM |
2375 | if (server->flags & NFS_MOUNT_UNSHARED) |
2376 | compare_super = NULL; | |
2377 | ||
fb2088cc SP |
2378 | /* -o noac implies -o sync */ |
2379 | if (server->flags & NFS_MOUNT_NOAC) | |
2380 | sb_mntdata.mntflags |= MS_SYNCHRONOUS; | |
2381 | ||
54ceac45 | 2382 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 2383 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2384 | if (IS_ERR(s)) { |
2385 | error = PTR_ERR(s); | |
2386 | goto out_err_nosb; | |
2387 | } | |
5006a76c | 2388 | |
54ceac45 DH |
2389 | if (s->s_fs_info != server) { |
2390 | nfs_free_server(server); | |
2391 | server = NULL; | |
fa799759 MS |
2392 | } else { |
2393 | error = nfs_bdi_register(server); | |
2394 | if (error) | |
cfbc0683 | 2395 | goto error_splat_bdi; |
f7b422b1 | 2396 | } |
24c8dbbb | 2397 | |
54ceac45 DH |
2398 | if (!s->s_root) { |
2399 | /* initial superblock/root creation */ | |
54ceac45 | 2400 | nfs_clone_super(s, data->sb); |
2df54806 | 2401 | nfs_fscache_get_super_cookie(s, NULL, data); |
54ceac45 | 2402 | } |
f7b422b1 | 2403 | |
0d5839ad | 2404 | mntroot = nfs_get_root(s, data->fh, dev_name); |
54ceac45 DH |
2405 | if (IS_ERR(mntroot)) { |
2406 | error = PTR_ERR(mntroot); | |
2407 | goto error_splat_super; | |
f7b422b1 | 2408 | } |
e9cc6c23 | 2409 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
4c1fe2f7 NB |
2410 | dput(mntroot); |
2411 | error = -ESTALE; | |
2412 | goto error_splat_super; | |
2413 | } | |
f7b422b1 | 2414 | |
54ceac45 | 2415 | s->s_flags |= MS_ACTIVE; |
f7b422b1 | 2416 | |
f9c3a380 EP |
2417 | /* clone any lsm security options from the parent to the new sb */ |
2418 | security_sb_clone_mnt_opts(data->sb, s); | |
2419 | ||
31f43471 AV |
2420 | dprintk("<-- nfs_xdev_mount() = 0\n"); |
2421 | return mntroot; | |
24c8dbbb | 2422 | |
54ceac45 DH |
2423 | out_err_nosb: |
2424 | nfs_free_server(server); | |
2425 | out_err_noserver: | |
31f43471 AV |
2426 | dprintk("<-- nfs_xdev_mount() = %d [error]\n", error); |
2427 | return ERR_PTR(error); | |
f7b422b1 | 2428 | |
54ceac45 | 2429 | error_splat_super: |
cfbc0683 N |
2430 | if (server && !s->s_root) |
2431 | bdi_unregister(&server->backing_dev_info); | |
2432 | error_splat_bdi: | |
6f5bbff9 | 2433 | deactivate_locked_super(s); |
31f43471 AV |
2434 | dprintk("<-- nfs_xdev_mount() = %d [splat]\n", error); |
2435 | return ERR_PTR(error); | |
f7b422b1 DH |
2436 | } |
2437 | ||
54ceac45 DH |
2438 | #ifdef CONFIG_NFS_V4 |
2439 | ||
f7b422b1 | 2440 | /* |
54ceac45 | 2441 | * Finish setting up a cloned NFS4 superblock |
f7b422b1 | 2442 | */ |
54ceac45 DH |
2443 | static void nfs4_clone_super(struct super_block *sb, |
2444 | const struct super_block *old_sb) | |
f7b422b1 | 2445 | { |
54ceac45 DH |
2446 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; |
2447 | sb->s_blocksize = old_sb->s_blocksize; | |
2448 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 2449 | sb->s_time_gran = 1; |
54ceac45 | 2450 | sb->s_op = old_sb->s_op; |
a8a5da99 AK |
2451 | /* |
2452 | * The VFS shouldn't apply the umask to mode bits. We will do | |
2453 | * so ourselves when necessary. | |
2454 | */ | |
2455 | sb->s_flags |= MS_POSIXACL; | |
64c2ce8b AK |
2456 | sb->s_xattr = old_sb->s_xattr; |
2457 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
2458 | } |
2459 | ||
54ceac45 DH |
2460 | /* |
2461 | * Set up an NFS4 superblock | |
2462 | */ | |
2463 | static void nfs4_fill_super(struct super_block *sb) | |
f7b422b1 | 2464 | { |
54ceac45 DH |
2465 | sb->s_time_gran = 1; |
2466 | sb->s_op = &nfs4_sops; | |
a8a5da99 AK |
2467 | /* |
2468 | * The VFS shouldn't apply the umask to mode bits. We will do | |
2469 | * so ourselves when necessary. | |
2470 | */ | |
2471 | sb->s_flags |= MS_POSIXACL; | |
64c2ce8b | 2472 | sb->s_xattr = nfs4_xattr_handlers; |
54ceac45 | 2473 | nfs_initialise_sb(sb); |
f7b422b1 DH |
2474 | } |
2475 | ||
01c3f052 TM |
2476 | static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) |
2477 | { | |
5eebde23 SJ |
2478 | args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3| |
2479 | NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL); | |
01c3f052 TM |
2480 | } |
2481 | ||
7630c852 CL |
2482 | static int nfs4_validate_text_mount_data(void *options, |
2483 | struct nfs_parsed_mount_data *args, | |
2484 | const char *dev_name) | |
2485 | { | |
2486 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; | |
2487 | ||
f5855fec | 2488 | nfs_set_port(sap, &args->nfs_server.port, NFS_PORT); |
7630c852 CL |
2489 | |
2490 | nfs_validate_transport_protocol(args); | |
2491 | ||
2492 | nfs4_validate_mount_flags(args); | |
2493 | ||
2ecda72b TM |
2494 | if (args->version != 4) { |
2495 | dfprintk(MOUNT, | |
2496 | "NFS4: Illegal mount version\n"); | |
2497 | return -EINVAL; | |
2498 | } | |
2499 | ||
7630c852 CL |
2500 | if (args->auth_flavor_len > 1) { |
2501 | dfprintk(MOUNT, | |
2502 | "NFS4: Too many RPC auth flavours specified\n"); | |
2503 | return -EINVAL; | |
2504 | } | |
2505 | ||
2506 | if (args->client_address == NULL) { | |
2507 | dfprintk(MOUNT, | |
2508 | "NFS4: mount program didn't pass callback address\n"); | |
2509 | return -EINVAL; | |
2510 | } | |
2511 | ||
2512 | return nfs_parse_devname(dev_name, | |
2513 | &args->nfs_server.hostname, | |
2514 | NFS4_MAXNAMLEN, | |
2515 | &args->nfs_server.export_path, | |
2516 | NFS4_MAXPATHLEN); | |
2517 | } | |
2518 | ||
f0768ebd CL |
2519 | /* |
2520 | * Validate NFSv4 mount options | |
2521 | */ | |
91ea40b9 TT |
2522 | static int nfs4_validate_mount_data(void *options, |
2523 | struct nfs_parsed_mount_data *args, | |
2524 | const char *dev_name) | |
f0768ebd | 2525 | { |
4cfd74fc | 2526 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; |
91ea40b9 | 2527 | struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; |
f0768ebd CL |
2528 | char *c; |
2529 | ||
2530 | if (data == NULL) | |
2531 | goto out_no_data; | |
2532 | ||
2533 | switch (data->version) { | |
2534 | case 1: | |
4c568017 CL |
2535 | if (data->host_addrlen > sizeof(args->nfs_server.address)) |
2536 | goto out_no_address; | |
2537 | if (data->host_addrlen == 0) | |
f0768ebd | 2538 | goto out_no_address; |
4c568017 | 2539 | args->nfs_server.addrlen = data->host_addrlen; |
4cfd74fc | 2540 | if (copy_from_user(sap, data->host_addr, data->host_addrlen)) |
f0768ebd | 2541 | return -EFAULT; |
4cfd74fc | 2542 | if (!nfs_verify_server_address(sap)) |
f0768ebd CL |
2543 | goto out_no_address; |
2544 | ||
6738b251 CL |
2545 | if (data->auth_flavourlen) { |
2546 | if (data->auth_flavourlen > 1) | |
2547 | goto out_inval_auth; | |
20c71f5e | 2548 | if (copy_from_user(&args->auth_flavors[0], |
91ea40b9 | 2549 | data->auth_flavours, |
20c71f5e | 2550 | sizeof(args->auth_flavors[0]))) |
f0768ebd | 2551 | return -EFAULT; |
f0768ebd CL |
2552 | } |
2553 | ||
2554 | c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); | |
2555 | if (IS_ERR(c)) | |
2556 | return PTR_ERR(c); | |
91ea40b9 | 2557 | args->nfs_server.hostname = c; |
f0768ebd CL |
2558 | |
2559 | c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); | |
2560 | if (IS_ERR(c)) | |
2561 | return PTR_ERR(c); | |
91ea40b9 TT |
2562 | args->nfs_server.export_path = c; |
2563 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); | |
f0768ebd CL |
2564 | |
2565 | c = strndup_user(data->client_addr.data, 16); | |
2566 | if (IS_ERR(c)) | |
2567 | return PTR_ERR(c); | |
91ea40b9 TT |
2568 | args->client_address = c; |
2569 | ||
2570 | /* | |
2571 | * Translate to nfs_parsed_mount_data, which nfs4_fill_super | |
2572 | * can deal with. | |
2573 | */ | |
2574 | ||
2575 | args->flags = data->flags & NFS4_MOUNT_FLAGMASK; | |
2576 | args->rsize = data->rsize; | |
2577 | args->wsize = data->wsize; | |
2578 | args->timeo = data->timeo; | |
2579 | args->retrans = data->retrans; | |
2580 | args->acregmin = data->acregmin; | |
2581 | args->acregmax = data->acregmax; | |
2582 | args->acdirmin = data->acdirmin; | |
2583 | args->acdirmax = data->acdirmax; | |
2584 | args->nfs_server.protocol = data->proto; | |
259875ef | 2585 | nfs_validate_transport_protocol(args); |
f0768ebd CL |
2586 | |
2587 | break; | |
7630c852 | 2588 | default: |
91ea40b9 | 2589 | if (nfs_parse_mount_options((char *)options, args) == 0) |
80071225 CL |
2590 | return -EINVAL; |
2591 | ||
4cfd74fc | 2592 | if (!nfs_verify_server_address(sap)) |
80071225 | 2593 | return -EINVAL; |
dc045898 | 2594 | |
7630c852 | 2595 | return nfs4_validate_text_mount_data(options, args, dev_name); |
f0768ebd CL |
2596 | } |
2597 | ||
2598 | return 0; | |
2599 | ||
2600 | out_no_data: | |
2601 | dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); | |
2602 | return -EINVAL; | |
2603 | ||
2604 | out_inval_auth: | |
2605 | dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", | |
2606 | data->auth_flavourlen); | |
2607 | return -EINVAL; | |
2608 | ||
2609 | out_no_address: | |
2610 | dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); | |
2611 | return -EINVAL; | |
f0768ebd CL |
2612 | } |
2613 | ||
54ceac45 | 2614 | /* |
c02d7adf | 2615 | * Get the superblock for the NFS4 root partition |
54ceac45 | 2616 | */ |
31f43471 AV |
2617 | static struct dentry * |
2618 | nfs4_remote_mount(struct file_system_type *fs_type, int flags, | |
2619 | const char *dev_name, void *raw_data) | |
f7b422b1 | 2620 | { |
c02d7adf | 2621 | struct nfs_parsed_mount_data *data = raw_data; |
54ceac45 DH |
2622 | struct super_block *s; |
2623 | struct nfs_server *server; | |
33852a1f | 2624 | struct nfs_fh *mntfh; |
54ceac45 | 2625 | struct dentry *mntroot; |
75180df2 | 2626 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2627 | struct nfs_sb_mountdata sb_mntdata = { |
2628 | .mntflags = flags, | |
2629 | }; | |
33852a1f TM |
2630 | int error = -ENOMEM; |
2631 | ||
b157b06c | 2632 | mntfh = nfs_alloc_fhandle(); |
33852a1f | 2633 | if (data == NULL || mntfh == NULL) |
8a0d551a | 2634 | goto out; |
f9c3a380 | 2635 | |
54ceac45 | 2636 | /* Get a volume representation */ |
33852a1f | 2637 | server = nfs4_create_server(data, mntfh); |
54ceac45 DH |
2638 | if (IS_ERR(server)) { |
2639 | error = PTR_ERR(server); | |
29eb981a | 2640 | goto out; |
f7b422b1 | 2641 | } |
e89a5a43 | 2642 | sb_mntdata.server = server; |
f7b422b1 | 2643 | |
75180df2 TM |
2644 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2645 | compare_super = NULL; | |
2646 | ||
fb2088cc SP |
2647 | /* -o noac implies -o sync */ |
2648 | if (server->flags & NFS_MOUNT_NOAC) | |
2649 | sb_mntdata.mntflags |= MS_SYNCHRONOUS; | |
2650 | ||
54ceac45 | 2651 | /* Get a superblock - note that we may end up sharing one that already exists */ |
c02d7adf | 2652 | s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
2653 | if (IS_ERR(s)) { |
2654 | error = PTR_ERR(s); | |
f7b422b1 | 2655 | goto out_free; |
816724e6 TM |
2656 | } |
2657 | ||
5dd3177a TM |
2658 | if (s->s_fs_info != server) { |
2659 | nfs_free_server(server); | |
2660 | server = NULL; | |
fa799759 MS |
2661 | } else { |
2662 | error = nfs_bdi_register(server); | |
2663 | if (error) | |
cfbc0683 | 2664 | goto error_splat_bdi; |
5dd3177a TM |
2665 | } |
2666 | ||
54ceac45 DH |
2667 | if (!s->s_root) { |
2668 | /* initial superblock/root creation */ | |
54ceac45 | 2669 | nfs4_fill_super(s); |
c15c928f | 2670 | nfs_fscache_get_super_cookie(s, data->fscache_uniq, NULL); |
54ceac45 | 2671 | } |
f7b422b1 | 2672 | |
0d5839ad | 2673 | mntroot = nfs4_get_root(s, mntfh, dev_name); |
54ceac45 DH |
2674 | if (IS_ERR(mntroot)) { |
2675 | error = PTR_ERR(mntroot); | |
2676 | goto error_splat_super; | |
f7b422b1 | 2677 | } |
54ceac45 | 2678 | |
33852a1f | 2679 | error = security_sb_set_mnt_opts(s, &data->lsm_opts); |
46c8ac74 EP |
2680 | if (error) |
2681 | goto error_splat_root; | |
2682 | ||
f7b422b1 | 2683 | s->s_flags |= MS_ACTIVE; |
31f43471 | 2684 | |
31f43471 AV |
2685 | nfs_free_fhandle(mntfh); |
2686 | return mntroot; | |
29eb981a CL |
2687 | |
2688 | out: | |
b157b06c | 2689 | nfs_free_fhandle(mntfh); |
31f43471 | 2690 | return ERR_PTR(error); |
54ceac45 | 2691 | |
f7b422b1 | 2692 | out_free: |
54ceac45 | 2693 | nfs_free_server(server); |
29eb981a | 2694 | goto out; |
54ceac45 | 2695 | |
46c8ac74 EP |
2696 | error_splat_root: |
2697 | dput(mntroot); | |
54ceac45 | 2698 | error_splat_super: |
cfbc0683 N |
2699 | if (server && !s->s_root) |
2700 | bdi_unregister(&server->backing_dev_info); | |
2701 | error_splat_bdi: | |
6f5bbff9 | 2702 | deactivate_locked_super(s); |
29eb981a | 2703 | goto out; |
f7b422b1 DH |
2704 | } |
2705 | ||
c02d7adf TM |
2706 | static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type, |
2707 | int flags, void *data, const char *hostname) | |
2708 | { | |
2709 | struct vfsmount *root_mnt; | |
2710 | char *root_devname; | |
2711 | size_t len; | |
2712 | ||
2713 | len = strlen(hostname) + 3; | |
2714 | root_devname = kmalloc(len, GFP_KERNEL); | |
2715 | if (root_devname == NULL) | |
2716 | return ERR_PTR(-ENOMEM); | |
2717 | snprintf(root_devname, len, "%s:/", hostname); | |
2718 | root_mnt = vfs_kern_mount(fs_type, flags, root_devname, data); | |
2719 | kfree(root_devname); | |
2720 | return root_mnt; | |
2721 | } | |
2722 | ||
ce587e07 TM |
2723 | struct nfs_referral_count { |
2724 | struct list_head list; | |
2725 | const struct task_struct *task; | |
2726 | unsigned int referral_count; | |
2727 | }; | |
2728 | ||
2729 | static LIST_HEAD(nfs_referral_count_list); | |
2730 | static DEFINE_SPINLOCK(nfs_referral_count_list_lock); | |
2731 | ||
2732 | static struct nfs_referral_count *nfs_find_referral_count(void) | |
2733 | { | |
2734 | struct nfs_referral_count *p; | |
2735 | ||
2736 | list_for_each_entry(p, &nfs_referral_count_list, list) { | |
2737 | if (p->task == current) | |
2738 | return p; | |
2739 | } | |
2740 | return NULL; | |
2741 | } | |
2742 | ||
2743 | #define NFS_MAX_NESTED_REFERRALS 2 | |
2744 | ||
2745 | static int nfs_referral_loop_protect(void) | |
2746 | { | |
2747 | struct nfs_referral_count *p, *new; | |
2748 | int ret = -ENOMEM; | |
2749 | ||
2750 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
2751 | if (!new) | |
2752 | goto out; | |
2753 | new->task = current; | |
2754 | new->referral_count = 1; | |
2755 | ||
2756 | ret = 0; | |
2757 | spin_lock(&nfs_referral_count_list_lock); | |
2758 | p = nfs_find_referral_count(); | |
2759 | if (p != NULL) { | |
2760 | if (p->referral_count >= NFS_MAX_NESTED_REFERRALS) | |
2761 | ret = -ELOOP; | |
2762 | else | |
2763 | p->referral_count++; | |
2764 | } else { | |
2765 | list_add(&new->list, &nfs_referral_count_list); | |
2766 | new = NULL; | |
2767 | } | |
2768 | spin_unlock(&nfs_referral_count_list_lock); | |
2769 | kfree(new); | |
2770 | out: | |
2771 | return ret; | |
2772 | } | |
2773 | ||
2774 | static void nfs_referral_loop_unprotect(void) | |
2775 | { | |
2776 | struct nfs_referral_count *p; | |
2777 | ||
2778 | spin_lock(&nfs_referral_count_list_lock); | |
2779 | p = nfs_find_referral_count(); | |
2780 | p->referral_count--; | |
2781 | if (p->referral_count == 0) | |
2782 | list_del(&p->list); | |
2783 | else | |
2784 | p = NULL; | |
2785 | spin_unlock(&nfs_referral_count_list_lock); | |
2786 | kfree(p); | |
2787 | } | |
2788 | ||
01194981 AV |
2789 | static struct dentry *nfs_follow_remote_path(struct vfsmount *root_mnt, |
2790 | const char *export_path) | |
c02d7adf | 2791 | { |
01194981 | 2792 | struct dentry *dentry; |
5352d3b6 | 2793 | int err; |
c02d7adf | 2794 | |
5352d3b6 AV |
2795 | if (IS_ERR(root_mnt)) |
2796 | return ERR_CAST(root_mnt); | |
2797 | ||
2798 | err = nfs_referral_loop_protect(); | |
2799 | if (err) { | |
ea441d11 | 2800 | mntput(root_mnt); |
5352d3b6 | 2801 | return ERR_PTR(err); |
ea441d11 | 2802 | } |
c02d7adf | 2803 | |
ea441d11 AV |
2804 | dentry = mount_subtree(root_mnt, export_path); |
2805 | nfs_referral_loop_unprotect(); | |
c02d7adf | 2806 | |
01194981 | 2807 | return dentry; |
c02d7adf TM |
2808 | } |
2809 | ||
01194981 AV |
2810 | static struct dentry *nfs4_try_mount(int flags, const char *dev_name, |
2811 | struct nfs_parsed_mount_data *data) | |
a6fe23be CL |
2812 | { |
2813 | char *export_path; | |
2814 | struct vfsmount *root_mnt; | |
01194981 | 2815 | struct dentry *res; |
a6fe23be CL |
2816 | |
2817 | dfprintk(MOUNT, "--> nfs4_try_mount()\n"); | |
2818 | ||
2819 | export_path = data->nfs_server.export_path; | |
2820 | data->nfs_server.export_path = "/"; | |
2821 | root_mnt = nfs_do_root_mount(&nfs4_remote_fs_type, flags, data, | |
2822 | data->nfs_server.hostname); | |
2823 | data->nfs_server.export_path = export_path; | |
2824 | ||
5352d3b6 | 2825 | res = nfs_follow_remote_path(root_mnt, export_path); |
a6fe23be | 2826 | |
01194981 AV |
2827 | dfprintk(MOUNT, "<-- nfs4_try_mount() = %ld%s\n", |
2828 | IS_ERR(res) ? PTR_ERR(res) : 0, | |
2829 | IS_ERR(res) ? " [error]" : ""); | |
2830 | return res; | |
a6fe23be CL |
2831 | } |
2832 | ||
c02d7adf TM |
2833 | /* |
2834 | * Get the superblock for an NFS4 mountpoint | |
2835 | */ | |
01194981 AV |
2836 | static struct dentry *nfs4_mount(struct file_system_type *fs_type, |
2837 | int flags, const char *dev_name, void *raw_data) | |
c02d7adf TM |
2838 | { |
2839 | struct nfs_parsed_mount_data *data; | |
c02d7adf | 2840 | int error = -ENOMEM; |
01194981 | 2841 | struct dentry *res = ERR_PTR(-ENOMEM); |
c02d7adf | 2842 | |
c5811dbd | 2843 | data = nfs_alloc_parsed_mount_data(4); |
c02d7adf | 2844 | if (data == NULL) |
8a0d551a | 2845 | goto out; |
c02d7adf TM |
2846 | |
2847 | /* Validate the mount data */ | |
2848 | error = nfs4_validate_mount_data(raw_data, data, dev_name); | |
01194981 AV |
2849 | if (error < 0) { |
2850 | res = ERR_PTR(error); | |
c02d7adf | 2851 | goto out; |
01194981 | 2852 | } |
c02d7adf | 2853 | |
01194981 AV |
2854 | res = nfs4_try_mount(flags, dev_name, data); |
2855 | if (IS_ERR(res)) | |
2856 | error = PTR_ERR(res); | |
c02d7adf TM |
2857 | |
2858 | out: | |
8a0d551a | 2859 | nfs_free_parsed_mount_data(data); |
01194981 | 2860 | dprintk("<-- nfs4_mount() = %d%s\n", error, |
c02d7adf | 2861 | error != 0 ? " [error]" : ""); |
01194981 | 2862 | return res; |
c02d7adf TM |
2863 | } |
2864 | ||
f7b422b1 DH |
2865 | static void nfs4_kill_super(struct super_block *sb) |
2866 | { | |
2867 | struct nfs_server *server = NFS_SB(sb); | |
2868 | ||
0f3e66c6 | 2869 | dprintk("--> %s\n", __func__); |
515d8611 | 2870 | nfs_super_return_all_delegations(sb); |
f7b422b1 | 2871 | kill_anon_super(sb); |
08734048 | 2872 | nfs_fscache_release_super_cookie(sb); |
54ceac45 | 2873 | nfs_free_server(server); |
0f3e66c6 | 2874 | dprintk("<-- %s\n", __func__); |
f7b422b1 DH |
2875 | } |
2876 | ||
2877 | /* | |
54ceac45 | 2878 | * Clone an NFS4 server record on xdev traversal (FSID-change) |
f7b422b1 | 2879 | */ |
31f43471 AV |
2880 | static struct dentry * |
2881 | nfs4_xdev_mount(struct file_system_type *fs_type, int flags, | |
2882 | const char *dev_name, void *raw_data) | |
f7b422b1 | 2883 | { |
54ceac45 DH |
2884 | struct nfs_clone_mount *data = raw_data; |
2885 | struct super_block *s; | |
2886 | struct nfs_server *server; | |
2887 | struct dentry *mntroot; | |
75180df2 | 2888 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2889 | struct nfs_sb_mountdata sb_mntdata = { |
2890 | .mntflags = flags, | |
2891 | }; | |
54ceac45 | 2892 | int error; |
f7b422b1 | 2893 | |
31f43471 | 2894 | dprintk("--> nfs4_xdev_mount()\n"); |
f7b422b1 | 2895 | |
54ceac45 DH |
2896 | /* create a new volume representation */ |
2897 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
2898 | if (IS_ERR(server)) { | |
2899 | error = PTR_ERR(server); | |
2900 | goto out_err_noserver; | |
f7b422b1 | 2901 | } |
e89a5a43 | 2902 | sb_mntdata.server = server; |
f7b422b1 | 2903 | |
75180df2 TM |
2904 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2905 | compare_super = NULL; | |
2906 | ||
fb2088cc SP |
2907 | /* -o noac implies -o sync */ |
2908 | if (server->flags & NFS_MOUNT_NOAC) | |
2909 | sb_mntdata.mntflags |= MS_SYNCHRONOUS; | |
2910 | ||
54ceac45 | 2911 | /* Get a superblock - note that we may end up sharing one that already exists */ |
ec9a05c9 | 2912 | s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2913 | if (IS_ERR(s)) { |
2914 | error = PTR_ERR(s); | |
2915 | goto out_err_nosb; | |
f7b422b1 | 2916 | } |
f7b422b1 | 2917 | |
54ceac45 DH |
2918 | if (s->s_fs_info != server) { |
2919 | nfs_free_server(server); | |
2920 | server = NULL; | |
fa799759 MS |
2921 | } else { |
2922 | error = nfs_bdi_register(server); | |
2923 | if (error) | |
cfbc0683 | 2924 | goto error_splat_bdi; |
54ceac45 | 2925 | } |
f7b422b1 | 2926 | |
54ceac45 DH |
2927 | if (!s->s_root) { |
2928 | /* initial superblock/root creation */ | |
54ceac45 | 2929 | nfs4_clone_super(s, data->sb); |
2df54806 | 2930 | nfs_fscache_get_super_cookie(s, NULL, data); |
54ceac45 | 2931 | } |
f7b422b1 | 2932 | |
0d5839ad | 2933 | mntroot = nfs4_get_root(s, data->fh, dev_name); |
54ceac45 DH |
2934 | if (IS_ERR(mntroot)) { |
2935 | error = PTR_ERR(mntroot); | |
2936 | goto error_splat_super; | |
2937 | } | |
e9cc6c23 TM |
2938 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
2939 | dput(mntroot); | |
2940 | error = -ESTALE; | |
2941 | goto error_splat_super; | |
2942 | } | |
f7b422b1 | 2943 | |
54ceac45 | 2944 | s->s_flags |= MS_ACTIVE; |
54ceac45 | 2945 | |
46c8ac74 EP |
2946 | security_sb_clone_mnt_opts(data->sb, s); |
2947 | ||
31f43471 AV |
2948 | dprintk("<-- nfs4_xdev_mount() = 0\n"); |
2949 | return mntroot; | |
54ceac45 DH |
2950 | |
2951 | out_err_nosb: | |
2952 | nfs_free_server(server); | |
2953 | out_err_noserver: | |
31f43471 AV |
2954 | dprintk("<-- nfs4_xdev_mount() = %d [error]\n", error); |
2955 | return ERR_PTR(error); | |
54ceac45 DH |
2956 | |
2957 | error_splat_super: | |
cfbc0683 N |
2958 | if (server && !s->s_root) |
2959 | bdi_unregister(&server->backing_dev_info); | |
2960 | error_splat_bdi: | |
6f5bbff9 | 2961 | deactivate_locked_super(s); |
31f43471 AV |
2962 | dprintk("<-- nfs4_xdev_mount() = %d [splat]\n", error); |
2963 | return ERR_PTR(error); | |
f7b422b1 DH |
2964 | } |
2965 | ||
31f43471 AV |
2966 | static struct dentry * |
2967 | nfs4_remote_referral_mount(struct file_system_type *fs_type, int flags, | |
2968 | const char *dev_name, void *raw_data) | |
f7b422b1 DH |
2969 | { |
2970 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
2971 | struct super_block *s; |
2972 | struct nfs_server *server; | |
2973 | struct dentry *mntroot; | |
4f727296 | 2974 | struct nfs_fh *mntfh; |
75180df2 | 2975 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2976 | struct nfs_sb_mountdata sb_mntdata = { |
2977 | .mntflags = flags, | |
2978 | }; | |
4f727296 | 2979 | int error = -ENOMEM; |
54ceac45 DH |
2980 | |
2981 | dprintk("--> nfs4_referral_get_sb()\n"); | |
2982 | ||
4f727296 TM |
2983 | mntfh = nfs_alloc_fhandle(); |
2984 | if (mntfh == NULL) | |
2985 | goto out_err_nofh; | |
2986 | ||
54ceac45 | 2987 | /* create a new volume representation */ |
4f727296 | 2988 | server = nfs4_create_referral_server(data, mntfh); |
54ceac45 DH |
2989 | if (IS_ERR(server)) { |
2990 | error = PTR_ERR(server); | |
2991 | goto out_err_noserver; | |
2992 | } | |
e89a5a43 | 2993 | sb_mntdata.server = server; |
54ceac45 | 2994 | |
75180df2 TM |
2995 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2996 | compare_super = NULL; | |
2997 | ||
fb2088cc SP |
2998 | /* -o noac implies -o sync */ |
2999 | if (server->flags & NFS_MOUNT_NOAC) | |
3000 | sb_mntdata.mntflags |= MS_SYNCHRONOUS; | |
3001 | ||
54ceac45 | 3002 | /* Get a superblock - note that we may end up sharing one that already exists */ |
ec9a05c9 | 3003 | s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
3004 | if (IS_ERR(s)) { |
3005 | error = PTR_ERR(s); | |
3006 | goto out_err_nosb; | |
3007 | } | |
3008 | ||
3009 | if (s->s_fs_info != server) { | |
3010 | nfs_free_server(server); | |
3011 | server = NULL; | |
fa799759 MS |
3012 | } else { |
3013 | error = nfs_bdi_register(server); | |
3014 | if (error) | |
cfbc0683 | 3015 | goto error_splat_bdi; |
54ceac45 DH |
3016 | } |
3017 | ||
3018 | if (!s->s_root) { | |
3019 | /* initial superblock/root creation */ | |
54ceac45 | 3020 | nfs4_fill_super(s); |
2df54806 | 3021 | nfs_fscache_get_super_cookie(s, NULL, data); |
54ceac45 DH |
3022 | } |
3023 | ||
0d5839ad | 3024 | mntroot = nfs4_get_root(s, mntfh, dev_name); |
54ceac45 DH |
3025 | if (IS_ERR(mntroot)) { |
3026 | error = PTR_ERR(mntroot); | |
3027 | goto error_splat_super; | |
3028 | } | |
e9cc6c23 TM |
3029 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
3030 | dput(mntroot); | |
3031 | error = -ESTALE; | |
3032 | goto error_splat_super; | |
3033 | } | |
54ceac45 DH |
3034 | |
3035 | s->s_flags |= MS_ACTIVE; | |
54ceac45 | 3036 | |
46c8ac74 EP |
3037 | security_sb_clone_mnt_opts(data->sb, s); |
3038 | ||
4f727296 | 3039 | nfs_free_fhandle(mntfh); |
54ceac45 | 3040 | dprintk("<-- nfs4_referral_get_sb() = 0\n"); |
31f43471 | 3041 | return mntroot; |
54ceac45 DH |
3042 | |
3043 | out_err_nosb: | |
3044 | nfs_free_server(server); | |
3045 | out_err_noserver: | |
4f727296 TM |
3046 | nfs_free_fhandle(mntfh); |
3047 | out_err_nofh: | |
54ceac45 | 3048 | dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error); |
31f43471 | 3049 | return ERR_PTR(error); |
54ceac45 DH |
3050 | |
3051 | error_splat_super: | |
cfbc0683 N |
3052 | if (server && !s->s_root) |
3053 | bdi_unregister(&server->backing_dev_info); | |
3054 | error_splat_bdi: | |
6f5bbff9 | 3055 | deactivate_locked_super(s); |
4f727296 | 3056 | nfs_free_fhandle(mntfh); |
54ceac45 | 3057 | dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error); |
31f43471 | 3058 | return ERR_PTR(error); |
f7b422b1 DH |
3059 | } |
3060 | ||
c02d7adf TM |
3061 | /* |
3062 | * Create an NFS4 server record on referral traversal | |
3063 | */ | |
01194981 AV |
3064 | static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, |
3065 | int flags, const char *dev_name, void *raw_data) | |
c02d7adf TM |
3066 | { |
3067 | struct nfs_clone_mount *data = raw_data; | |
3068 | char *export_path; | |
3069 | struct vfsmount *root_mnt; | |
01194981 | 3070 | struct dentry *res; |
c02d7adf | 3071 | |
01194981 | 3072 | dprintk("--> nfs4_referral_mount()\n"); |
c02d7adf TM |
3073 | |
3074 | export_path = data->mnt_path; | |
3075 | data->mnt_path = "/"; | |
3076 | ||
3077 | root_mnt = nfs_do_root_mount(&nfs4_remote_referral_fs_type, | |
3078 | flags, data, data->hostname); | |
3079 | data->mnt_path = export_path; | |
3080 | ||
5352d3b6 | 3081 | res = nfs_follow_remote_path(root_mnt, export_path); |
01194981 AV |
3082 | dprintk("<-- nfs4_referral_mount() = %ld%s\n", |
3083 | IS_ERR(res) ? PTR_ERR(res) : 0, | |
3084 | IS_ERR(res) ? " [error]" : ""); | |
3085 | return res; | |
c02d7adf TM |
3086 | } |
3087 | ||
54ceac45 | 3088 | #endif /* CONFIG_NFS_V4 */ |