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 | * | |
8 | * Modularised by Alan Cox <Alan.Cox@linux.org>, while hacking some | |
9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. | |
10 | * | |
11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
12 | * J.S.Peatfield@damtp.cam.ac.uk | |
13 | * | |
14 | * Split from inode.c by David Howells <dhowells@redhat.com> | |
15 | * | |
54ceac45 DH |
16 | * - superblocks are indexed on server only - all inodes, dentries, etc. associated with a |
17 | * particular server are held in the same superblock | |
18 | * - NFS superblocks can have several effective roots to the dentry tree | |
19 | * - directory type roots are spliced into the tree when a path from one root reaches the root | |
20 | * of another (see nfs_lookup()) | |
f7b422b1 DH |
21 | */ |
22 | ||
f7b422b1 DH |
23 | #include <linux/module.h> |
24 | #include <linux/init.h> | |
25 | ||
26 | #include <linux/time.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/string.h> | |
30 | #include <linux/stat.h> | |
31 | #include <linux/errno.h> | |
32 | #include <linux/unistd.h> | |
33 | #include <linux/sunrpc/clnt.h> | |
34 | #include <linux/sunrpc/stats.h> | |
35 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 36 | #include <linux/sunrpc/xprtsock.h> |
2cf7ff7a | 37 | #include <linux/sunrpc/xprtrdma.h> |
f7b422b1 DH |
38 | #include <linux/nfs_fs.h> |
39 | #include <linux/nfs_mount.h> | |
40 | #include <linux/nfs4_mount.h> | |
41 | #include <linux/lockd/bind.h> | |
42 | #include <linux/smp_lock.h> | |
43 | #include <linux/seq_file.h> | |
44 | #include <linux/mount.h> | |
45 | #include <linux/nfs_idmap.h> | |
46 | #include <linux/vfs.h> | |
47 | #include <linux/inet.h> | |
fd00a8ff CL |
48 | #include <linux/in6.h> |
49 | #include <net/ipv6.h> | |
d8e7748a | 50 | #include <linux/netdevice.h> |
f7b422b1 | 51 | #include <linux/nfs_xdr.h> |
b5d5dfbd | 52 | #include <linux/magic.h> |
bf0fd768 | 53 | #include <linux/parser.h> |
f7b422b1 DH |
54 | |
55 | #include <asm/system.h> | |
56 | #include <asm/uaccess.h> | |
57 | ||
58 | #include "nfs4_fs.h" | |
59 | #include "callback.h" | |
60 | #include "delegation.h" | |
61 | #include "iostat.h" | |
62 | #include "internal.h" | |
63 | ||
64 | #define NFSDBG_FACILITY NFSDBG_VFS | |
65 | ||
bf0fd768 CL |
66 | enum { |
67 | /* Mount options that take no arguments */ | |
68 | Opt_soft, Opt_hard, | |
bf0fd768 CL |
69 | Opt_posix, Opt_noposix, |
70 | Opt_cto, Opt_nocto, | |
71 | Opt_ac, Opt_noac, | |
72 | Opt_lock, Opt_nolock, | |
73 | Opt_v2, Opt_v3, | |
2cf7ff7a | 74 | Opt_udp, Opt_tcp, Opt_rdma, |
bf0fd768 CL |
75 | Opt_acl, Opt_noacl, |
76 | Opt_rdirplus, Opt_nordirplus, | |
75180df2 | 77 | Opt_sharecache, Opt_nosharecache, |
bf0fd768 CL |
78 | |
79 | /* Mount options that take integer arguments */ | |
80 | Opt_port, | |
81 | Opt_rsize, Opt_wsize, Opt_bsize, | |
82 | Opt_timeo, Opt_retrans, | |
83 | Opt_acregmin, Opt_acregmax, | |
84 | Opt_acdirmin, Opt_acdirmax, | |
85 | Opt_actimeo, | |
86 | Opt_namelen, | |
87 | Opt_mountport, | |
e887cbcf | 88 | Opt_mountvers, |
ad879cef | 89 | Opt_nfsvers, |
bf0fd768 CL |
90 | |
91 | /* Mount options that take string arguments */ | |
33832034 | 92 | Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost, |
0ac83779 | 93 | Opt_addr, Opt_mountaddr, Opt_clientaddr, |
bf0fd768 CL |
94 | |
95 | /* Mount options that are ignored */ | |
96 | Opt_userspace, Opt_deprecated, | |
97 | ||
98 | Opt_err | |
99 | }; | |
100 | ||
101 | static match_table_t nfs_mount_option_tokens = { | |
102 | { Opt_userspace, "bg" }, | |
103 | { Opt_userspace, "fg" }, | |
ecbb3845 CL |
104 | { Opt_userspace, "retry=%s" }, |
105 | ||
bf0fd768 CL |
106 | { Opt_soft, "soft" }, |
107 | { Opt_hard, "hard" }, | |
d33e4dfe CL |
108 | { Opt_deprecated, "intr" }, |
109 | { Opt_deprecated, "nointr" }, | |
bf0fd768 CL |
110 | { Opt_posix, "posix" }, |
111 | { Opt_noposix, "noposix" }, | |
112 | { Opt_cto, "cto" }, | |
113 | { Opt_nocto, "nocto" }, | |
114 | { Opt_ac, "ac" }, | |
115 | { Opt_noac, "noac" }, | |
116 | { Opt_lock, "lock" }, | |
117 | { Opt_nolock, "nolock" }, | |
118 | { Opt_v2, "v2" }, | |
119 | { Opt_v3, "v3" }, | |
120 | { Opt_udp, "udp" }, | |
121 | { Opt_tcp, "tcp" }, | |
2cf7ff7a | 122 | { Opt_rdma, "rdma" }, |
bf0fd768 CL |
123 | { Opt_acl, "acl" }, |
124 | { Opt_noacl, "noacl" }, | |
125 | { Opt_rdirplus, "rdirplus" }, | |
126 | { Opt_nordirplus, "nordirplus" }, | |
75180df2 TM |
127 | { Opt_sharecache, "sharecache" }, |
128 | { Opt_nosharecache, "nosharecache" }, | |
bf0fd768 CL |
129 | |
130 | { Opt_port, "port=%u" }, | |
131 | { Opt_rsize, "rsize=%u" }, | |
132 | { Opt_wsize, "wsize=%u" }, | |
133 | { Opt_bsize, "bsize=%u" }, | |
134 | { Opt_timeo, "timeo=%u" }, | |
135 | { Opt_retrans, "retrans=%u" }, | |
136 | { Opt_acregmin, "acregmin=%u" }, | |
137 | { Opt_acregmax, "acregmax=%u" }, | |
138 | { Opt_acdirmin, "acdirmin=%u" }, | |
139 | { Opt_acdirmax, "acdirmax=%u" }, | |
140 | { Opt_actimeo, "actimeo=%u" }, | |
bf0fd768 CL |
141 | { Opt_namelen, "namlen=%u" }, |
142 | { Opt_mountport, "mountport=%u" }, | |
bf0fd768 | 143 | { Opt_mountvers, "mountvers=%u" }, |
bf0fd768 CL |
144 | { Opt_nfsvers, "nfsvers=%u" }, |
145 | { Opt_nfsvers, "vers=%u" }, | |
146 | ||
147 | { Opt_sec, "sec=%s" }, | |
148 | { Opt_proto, "proto=%s" }, | |
149 | { Opt_mountproto, "mountproto=%s" }, | |
150 | { Opt_addr, "addr=%s" }, | |
151 | { Opt_clientaddr, "clientaddr=%s" }, | |
33832034 | 152 | { Opt_mounthost, "mounthost=%s" }, |
0ac83779 | 153 | { Opt_mountaddr, "mountaddr=%s" }, |
bf0fd768 CL |
154 | |
155 | { Opt_err, NULL } | |
156 | }; | |
157 | ||
158 | enum { | |
2cf7ff7a | 159 | Opt_xprt_udp, Opt_xprt_tcp, Opt_xprt_rdma, |
bf0fd768 CL |
160 | |
161 | Opt_xprt_err | |
162 | }; | |
163 | ||
164 | static match_table_t nfs_xprt_protocol_tokens = { | |
165 | { Opt_xprt_udp, "udp" }, | |
166 | { Opt_xprt_tcp, "tcp" }, | |
2cf7ff7a | 167 | { Opt_xprt_rdma, "rdma" }, |
bf0fd768 CL |
168 | |
169 | { Opt_xprt_err, NULL } | |
170 | }; | |
171 | ||
172 | enum { | |
173 | Opt_sec_none, Opt_sec_sys, | |
174 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
175 | Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, | |
176 | Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, | |
177 | ||
178 | Opt_sec_err | |
179 | }; | |
180 | ||
181 | static match_table_t nfs_secflavor_tokens = { | |
182 | { Opt_sec_none, "none" }, | |
183 | { Opt_sec_none, "null" }, | |
184 | { Opt_sec_sys, "sys" }, | |
185 | ||
186 | { Opt_sec_krb5, "krb5" }, | |
187 | { Opt_sec_krb5i, "krb5i" }, | |
188 | { Opt_sec_krb5p, "krb5p" }, | |
189 | ||
190 | { Opt_sec_lkey, "lkey" }, | |
191 | { Opt_sec_lkeyi, "lkeyi" }, | |
192 | { Opt_sec_lkeyp, "lkeyp" }, | |
193 | ||
8d042218 OK |
194 | { Opt_sec_spkm, "spkm3" }, |
195 | { Opt_sec_spkmi, "spkm3i" }, | |
196 | { Opt_sec_spkmp, "spkm3p" }, | |
197 | ||
bf0fd768 CL |
198 | { Opt_sec_err, NULL } |
199 | }; | |
200 | ||
201 | ||
42faad99 | 202 | static void nfs_umount_begin(struct super_block *); |
816724e6 | 203 | static int nfs_statfs(struct dentry *, struct kstatfs *); |
f7b422b1 DH |
204 | static int nfs_show_options(struct seq_file *, struct vfsmount *); |
205 | static int nfs_show_stats(struct seq_file *, struct vfsmount *); | |
816724e6 | 206 | static int nfs_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *); |
54ceac45 | 207 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, |
816724e6 | 208 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); |
f7b422b1 | 209 | static void nfs_kill_super(struct super_block *); |
ef818a28 | 210 | static void nfs_put_super(struct super_block *); |
48b605f8 | 211 | static int nfs_remount(struct super_block *sb, int *flags, char *raw_data); |
f7b422b1 DH |
212 | |
213 | static struct file_system_type nfs_fs_type = { | |
214 | .owner = THIS_MODULE, | |
215 | .name = "nfs", | |
216 | .get_sb = nfs_get_sb, | |
217 | .kill_sb = nfs_kill_super, | |
349457cc | 218 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
219 | }; |
220 | ||
54ceac45 | 221 | struct file_system_type nfs_xdev_fs_type = { |
f7b422b1 DH |
222 | .owner = THIS_MODULE, |
223 | .name = "nfs", | |
54ceac45 | 224 | .get_sb = nfs_xdev_get_sb, |
f7b422b1 | 225 | .kill_sb = nfs_kill_super, |
349457cc | 226 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
227 | }; |
228 | ||
ee9b6d61 | 229 | static const struct super_operations nfs_sops = { |
f7b422b1 DH |
230 | .alloc_inode = nfs_alloc_inode, |
231 | .destroy_inode = nfs_destroy_inode, | |
232 | .write_inode = nfs_write_inode, | |
ef818a28 | 233 | .put_super = nfs_put_super, |
f7b422b1 DH |
234 | .statfs = nfs_statfs, |
235 | .clear_inode = nfs_clear_inode, | |
236 | .umount_begin = nfs_umount_begin, | |
237 | .show_options = nfs_show_options, | |
238 | .show_stats = nfs_show_stats, | |
48b605f8 | 239 | .remount_fs = nfs_remount, |
f7b422b1 DH |
240 | }; |
241 | ||
242 | #ifdef CONFIG_NFS_V4 | |
816724e6 TM |
243 | static int nfs4_get_sb(struct file_system_type *fs_type, |
244 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
54ceac45 DH |
245 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, |
246 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
247 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, | |
248 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
f7b422b1 DH |
249 | static void nfs4_kill_super(struct super_block *sb); |
250 | ||
251 | static struct file_system_type nfs4_fs_type = { | |
252 | .owner = THIS_MODULE, | |
253 | .name = "nfs4", | |
254 | .get_sb = nfs4_get_sb, | |
255 | .kill_sb = nfs4_kill_super, | |
349457cc | 256 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
257 | }; |
258 | ||
54ceac45 | 259 | struct file_system_type nfs4_xdev_fs_type = { |
f7b422b1 DH |
260 | .owner = THIS_MODULE, |
261 | .name = "nfs4", | |
54ceac45 | 262 | .get_sb = nfs4_xdev_get_sb, |
f7b422b1 | 263 | .kill_sb = nfs4_kill_super, |
349457cc | 264 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
265 | }; |
266 | ||
54ceac45 | 267 | struct file_system_type nfs4_referral_fs_type = { |
f7b422b1 DH |
268 | .owner = THIS_MODULE, |
269 | .name = "nfs4", | |
54ceac45 | 270 | .get_sb = nfs4_referral_get_sb, |
f7b422b1 | 271 | .kill_sb = nfs4_kill_super, |
349457cc | 272 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
273 | }; |
274 | ||
ee9b6d61 | 275 | static const struct super_operations nfs4_sops = { |
f7b422b1 DH |
276 | .alloc_inode = nfs_alloc_inode, |
277 | .destroy_inode = nfs_destroy_inode, | |
278 | .write_inode = nfs_write_inode, | |
279 | .statfs = nfs_statfs, | |
280 | .clear_inode = nfs4_clear_inode, | |
281 | .umount_begin = nfs_umount_begin, | |
282 | .show_options = nfs_show_options, | |
283 | .show_stats = nfs_show_stats, | |
48b605f8 | 284 | .remount_fs = nfs_remount, |
f7b422b1 DH |
285 | }; |
286 | #endif | |
287 | ||
8e1f936b RR |
288 | static struct shrinker acl_shrinker = { |
289 | .shrink = nfs_access_cache_shrinker, | |
290 | .seeks = DEFAULT_SEEKS, | |
291 | }; | |
979df72e | 292 | |
f7b422b1 DH |
293 | /* |
294 | * Register the NFS filesystems | |
295 | */ | |
296 | int __init register_nfs_fs(void) | |
297 | { | |
298 | int ret; | |
299 | ||
300 | ret = register_filesystem(&nfs_fs_type); | |
301 | if (ret < 0) | |
302 | goto error_0; | |
303 | ||
f7b422b1 DH |
304 | ret = nfs_register_sysctl(); |
305 | if (ret < 0) | |
306 | goto error_1; | |
89a09141 | 307 | #ifdef CONFIG_NFS_V4 |
f7b422b1 DH |
308 | ret = register_filesystem(&nfs4_fs_type); |
309 | if (ret < 0) | |
310 | goto error_2; | |
311 | #endif | |
8e1f936b | 312 | register_shrinker(&acl_shrinker); |
f7b422b1 DH |
313 | return 0; |
314 | ||
315 | #ifdef CONFIG_NFS_V4 | |
316 | error_2: | |
317 | nfs_unregister_sysctl(); | |
89a09141 | 318 | #endif |
f7b422b1 DH |
319 | error_1: |
320 | unregister_filesystem(&nfs_fs_type); | |
f7b422b1 DH |
321 | error_0: |
322 | return ret; | |
323 | } | |
324 | ||
325 | /* | |
326 | * Unregister the NFS filesystems | |
327 | */ | |
328 | void __exit unregister_nfs_fs(void) | |
329 | { | |
8e1f936b | 330 | unregister_shrinker(&acl_shrinker); |
f7b422b1 DH |
331 | #ifdef CONFIG_NFS_V4 |
332 | unregister_filesystem(&nfs4_fs_type); | |
f7b422b1 | 333 | #endif |
49af7ee1 | 334 | nfs_unregister_sysctl(); |
f7b422b1 DH |
335 | unregister_filesystem(&nfs_fs_type); |
336 | } | |
337 | ||
ef818a28 SD |
338 | void nfs_sb_active(struct nfs_server *server) |
339 | { | |
340 | atomic_inc(&server->active); | |
341 | } | |
342 | ||
343 | void nfs_sb_deactive(struct nfs_server *server) | |
344 | { | |
345 | if (atomic_dec_and_test(&server->active)) | |
346 | wake_up(&server->active_wq); | |
347 | } | |
348 | ||
349 | static void nfs_put_super(struct super_block *sb) | |
350 | { | |
351 | struct nfs_server *server = NFS_SB(sb); | |
352 | /* | |
353 | * Make sure there are no outstanding ops to this server. | |
354 | * If so, wait for them to finish before allowing the | |
355 | * unmount to continue. | |
356 | */ | |
357 | wait_event(server->active_wq, atomic_read(&server->active) == 0); | |
358 | } | |
359 | ||
f7b422b1 DH |
360 | /* |
361 | * Deliver file system statistics to userspace | |
362 | */ | |
816724e6 | 363 | static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
f7b422b1 | 364 | { |
0c7d90cf | 365 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
f7b422b1 DH |
366 | unsigned char blockbits; |
367 | unsigned long blockres; | |
0c7d90cf | 368 | struct nfs_fh *fh = NFS_FH(dentry->d_inode); |
f7b422b1 DH |
369 | struct nfs_fattr fattr; |
370 | struct nfs_fsstat res = { | |
371 | .fattr = &fattr, | |
372 | }; | |
373 | int error; | |
374 | ||
375 | lock_kernel(); | |
376 | ||
8fa5c000 | 377 | error = server->nfs_client->rpc_ops->statfs(server, fh, &res); |
f7b422b1 DH |
378 | if (error < 0) |
379 | goto out_err; | |
1a0ba9ae | 380 | buf->f_type = NFS_SUPER_MAGIC; |
f7b422b1 DH |
381 | |
382 | /* | |
383 | * Current versions of glibc do not correctly handle the | |
384 | * case where f_frsize != f_bsize. Eventually we want to | |
385 | * report the value of wtmult in this field. | |
386 | */ | |
0c7d90cf | 387 | buf->f_frsize = dentry->d_sb->s_blocksize; |
f7b422b1 DH |
388 | |
389 | /* | |
390 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
391 | * are reported in units of f_frsize. Linux hasn't had | |
392 | * an f_frsize field in its statfs struct until recently, | |
393 | * thus historically Linux's sys_statfs reports these | |
394 | * fields in units of f_bsize. | |
395 | */ | |
0c7d90cf DH |
396 | buf->f_bsize = dentry->d_sb->s_blocksize; |
397 | blockbits = dentry->d_sb->s_blocksize_bits; | |
f7b422b1 DH |
398 | blockres = (1 << blockbits) - 1; |
399 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
400 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
401 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
402 | ||
403 | buf->f_files = res.tfiles; | |
404 | buf->f_ffree = res.afiles; | |
405 | ||
406 | buf->f_namelen = server->namelen; | |
1a0ba9ae | 407 | |
f7b422b1 DH |
408 | unlock_kernel(); |
409 | return 0; | |
410 | ||
411 | out_err: | |
3110ff80 | 412 | dprintk("%s: statfs error = %d\n", __func__, -error); |
1a0ba9ae AA |
413 | unlock_kernel(); |
414 | return error; | |
f7b422b1 DH |
415 | } |
416 | ||
7d4e2747 DH |
417 | /* |
418 | * Map the security flavour number to a name | |
419 | */ | |
81039f1f TM |
420 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
421 | { | |
7d4e2747 | 422 | static const struct { |
81039f1f TM |
423 | rpc_authflavor_t flavour; |
424 | const char *str; | |
425 | } sec_flavours[] = { | |
426 | { RPC_AUTH_NULL, "null" }, | |
427 | { RPC_AUTH_UNIX, "sys" }, | |
428 | { RPC_AUTH_GSS_KRB5, "krb5" }, | |
429 | { RPC_AUTH_GSS_KRB5I, "krb5i" }, | |
430 | { RPC_AUTH_GSS_KRB5P, "krb5p" }, | |
431 | { RPC_AUTH_GSS_LKEY, "lkey" }, | |
432 | { RPC_AUTH_GSS_LKEYI, "lkeyi" }, | |
433 | { RPC_AUTH_GSS_LKEYP, "lkeyp" }, | |
434 | { RPC_AUTH_GSS_SPKM, "spkm" }, | |
435 | { RPC_AUTH_GSS_SPKMI, "spkmi" }, | |
436 | { RPC_AUTH_GSS_SPKMP, "spkmp" }, | |
4d81cd16 | 437 | { UINT_MAX, "unknown" } |
81039f1f TM |
438 | }; |
439 | int i; | |
440 | ||
4d81cd16 | 441 | for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) { |
81039f1f TM |
442 | if (sec_flavours[i].flavour == flavour) |
443 | break; | |
444 | } | |
445 | return sec_flavours[i].str; | |
446 | } | |
447 | ||
82d101d5 CL |
448 | static void nfs_show_mountd_options(struct seq_file *m, struct nfs_server *nfss, |
449 | int showdefaults) | |
450 | { | |
451 | struct sockaddr *sap = (struct sockaddr *)&nfss->mountd_address; | |
452 | ||
453 | switch (sap->sa_family) { | |
454 | case AF_INET: { | |
455 | struct sockaddr_in *sin = (struct sockaddr_in *)sap; | |
456 | seq_printf(m, ",mountaddr=" NIPQUAD_FMT, | |
457 | NIPQUAD(sin->sin_addr.s_addr)); | |
458 | break; | |
459 | } | |
460 | case AF_INET6: { | |
461 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
462 | seq_printf(m, ",mountaddr=" NIP6_FMT, | |
463 | NIP6(sin6->sin6_addr)); | |
464 | break; | |
465 | } | |
466 | default: | |
467 | if (showdefaults) | |
468 | seq_printf(m, ",mountaddr=unspecified"); | |
469 | } | |
470 | ||
471 | if (nfss->mountd_version || showdefaults) | |
472 | seq_printf(m, ",mountvers=%u", nfss->mountd_version); | |
473 | if (nfss->mountd_port || showdefaults) | |
474 | seq_printf(m, ",mountport=%u", nfss->mountd_port); | |
475 | ||
476 | switch (nfss->mountd_protocol) { | |
477 | case IPPROTO_UDP: | |
478 | seq_printf(m, ",mountproto=udp"); | |
479 | break; | |
480 | case IPPROTO_TCP: | |
481 | seq_printf(m, ",mountproto=tcp"); | |
482 | break; | |
483 | default: | |
484 | if (showdefaults) | |
485 | seq_printf(m, ",mountproto=auto"); | |
486 | } | |
487 | } | |
488 | ||
f7b422b1 DH |
489 | /* |
490 | * Describe the mount options in force on this server representation | |
491 | */ | |
82d101d5 CL |
492 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, |
493 | int showdefaults) | |
f7b422b1 | 494 | { |
509de811 | 495 | static const struct proc_nfs_info { |
f7b422b1 | 496 | int flag; |
509de811 DH |
497 | const char *str; |
498 | const char *nostr; | |
f7b422b1 DH |
499 | } nfs_info[] = { |
500 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, | |
82d101d5 CL |
501 | { NFS_MOUNT_INTR, ",intr", ",nointr" }, |
502 | { NFS_MOUNT_POSIX, ",posix", "" }, | |
f7b422b1 DH |
503 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
504 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
505 | { NFS_MOUNT_NONLM, ",nolock", "" }, | |
506 | { NFS_MOUNT_NOACL, ",noacl", "" }, | |
74dd34e6 | 507 | { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" }, |
75180df2 | 508 | { NFS_MOUNT_UNSHARED, ",nosharecache", ""}, |
f7b422b1 DH |
509 | { 0, NULL, NULL } |
510 | }; | |
509de811 | 511 | const struct proc_nfs_info *nfs_infop; |
8fa5c000 | 512 | struct nfs_client *clp = nfss->nfs_client; |
82d101d5 | 513 | u32 version = clp->rpc_ops->version; |
f7b422b1 | 514 | |
82d101d5 | 515 | seq_printf(m, ",vers=%u", version); |
2d767432 CL |
516 | seq_printf(m, ",rsize=%u", nfss->rsize); |
517 | seq_printf(m, ",wsize=%u", nfss->wsize); | |
82d101d5 CL |
518 | if (nfss->bsize != 0) |
519 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
520 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
f7b422b1 | 521 | if (nfss->acregmin != 3*HZ || showdefaults) |
2d767432 | 522 | seq_printf(m, ",acregmin=%u", nfss->acregmin/HZ); |
f7b422b1 | 523 | if (nfss->acregmax != 60*HZ || showdefaults) |
2d767432 | 524 | seq_printf(m, ",acregmax=%u", nfss->acregmax/HZ); |
f7b422b1 | 525 | if (nfss->acdirmin != 30*HZ || showdefaults) |
2d767432 | 526 | seq_printf(m, ",acdirmin=%u", nfss->acdirmin/HZ); |
f7b422b1 | 527 | if (nfss->acdirmax != 60*HZ || showdefaults) |
2d767432 | 528 | seq_printf(m, ",acdirmax=%u", nfss->acdirmax/HZ); |
f7b422b1 DH |
529 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { |
530 | if (nfss->flags & nfs_infop->flag) | |
531 | seq_puts(m, nfs_infop->str); | |
532 | else | |
533 | seq_puts(m, nfs_infop->nostr); | |
534 | } | |
56928edd TT |
535 | seq_printf(m, ",proto=%s", |
536 | rpc_peeraddr2str(nfss->client, RPC_DISPLAY_PROTO)); | |
82d101d5 CL |
537 | if (version == 4) { |
538 | if (nfss->port != NFS_PORT) | |
539 | seq_printf(m, ",port=%u", nfss->port); | |
540 | } else | |
541 | if (nfss->port) | |
542 | seq_printf(m, ",port=%u", nfss->port); | |
543 | ||
33170233 TM |
544 | seq_printf(m, ",timeo=%lu", 10U * nfss->client->cl_timeout->to_initval / HZ); |
545 | seq_printf(m, ",retrans=%u", nfss->client->cl_timeout->to_retries); | |
81039f1f | 546 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
82d101d5 CL |
547 | |
548 | if (version != 4) | |
549 | nfs_show_mountd_options(m, nfss, showdefaults); | |
550 | ||
551 | #ifdef CONFIG_NFS_V4 | |
552 | if (clp->rpc_ops->version == 4) | |
553 | seq_printf(m, ",clientaddr=%s", clp->cl_ipaddr); | |
554 | #endif | |
f7b422b1 DH |
555 | } |
556 | ||
557 | /* | |
558 | * Describe the mount options on this VFS mountpoint | |
559 | */ | |
560 | static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) | |
561 | { | |
562 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
563 | ||
564 | nfs_show_mount_options(m, nfss, 0); | |
565 | ||
5d8515ca CL |
566 | seq_printf(m, ",addr=%s", |
567 | rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient, | |
568 | RPC_DISPLAY_ADDR)); | |
f7b422b1 DH |
569 | |
570 | return 0; | |
571 | } | |
572 | ||
573 | /* | |
574 | * Present statistical information for this VFS mountpoint | |
575 | */ | |
576 | static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) | |
577 | { | |
578 | int i, cpu; | |
579 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
580 | struct rpc_auth *auth = nfss->client->cl_auth; | |
581 | struct nfs_iostats totals = { }; | |
582 | ||
583 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
584 | ||
585 | /* | |
586 | * Display all mount option settings | |
587 | */ | |
588 | seq_printf(m, "\n\topts:\t"); | |
589 | seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw"); | |
590 | seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); | |
591 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : ""); | |
592 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); | |
593 | nfs_show_mount_options(m, nfss, 1); | |
594 | ||
595 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); | |
596 | ||
597 | seq_printf(m, "\n\tcaps:\t"); | |
598 | seq_printf(m, "caps=0x%x", nfss->caps); | |
2d767432 CL |
599 | seq_printf(m, ",wtmult=%u", nfss->wtmult); |
600 | seq_printf(m, ",dtsize=%u", nfss->dtsize); | |
601 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
602 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
f7b422b1 DH |
603 | |
604 | #ifdef CONFIG_NFS_V4 | |
40c55319 | 605 | if (nfss->nfs_client->rpc_ops->version == 4) { |
f7b422b1 DH |
606 | seq_printf(m, "\n\tnfsv4:\t"); |
607 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); | |
608 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
609 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); | |
610 | } | |
611 | #endif | |
612 | ||
613 | /* | |
614 | * Display security flavor in effect for this mount | |
615 | */ | |
2d767432 | 616 | seq_printf(m, "\n\tsec:\tflavor=%u", auth->au_ops->au_flavor); |
f7b422b1 | 617 | if (auth->au_flavor) |
2d767432 | 618 | seq_printf(m, ",pseudoflavor=%u", auth->au_flavor); |
f7b422b1 DH |
619 | |
620 | /* | |
621 | * Display superblock I/O counters | |
622 | */ | |
623 | for_each_possible_cpu(cpu) { | |
624 | struct nfs_iostats *stats; | |
625 | ||
626 | preempt_disable(); | |
627 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
628 | ||
629 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
630 | totals.events[i] += stats->events[i]; | |
631 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
632 | totals.bytes[i] += stats->bytes[i]; | |
633 | ||
634 | preempt_enable(); | |
635 | } | |
636 | ||
637 | seq_printf(m, "\n\tevents:\t"); | |
638 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
639 | seq_printf(m, "%lu ", totals.events[i]); | |
640 | seq_printf(m, "\n\tbytes:\t"); | |
641 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
642 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
643 | seq_printf(m, "\n"); | |
644 | ||
645 | rpc_print_iostats(m, nfss->client); | |
646 | ||
647 | return 0; | |
648 | } | |
649 | ||
650 | /* | |
651 | * Begin unmount by attempting to remove all automounted mountpoints we added | |
54ceac45 | 652 | * in response to xdev traversals and referrals |
f7b422b1 | 653 | */ |
42faad99 | 654 | static void nfs_umount_begin(struct super_block *sb) |
f7b422b1 | 655 | { |
42faad99 | 656 | struct nfs_server *server = NFS_SB(sb); |
fc6ae3cf TM |
657 | struct rpc_clnt *rpc; |
658 | ||
fc6ae3cf TM |
659 | /* -EIO all pending I/O */ |
660 | rpc = server->client_acl; | |
661 | if (!IS_ERR(rpc)) | |
662 | rpc_killall_tasks(rpc); | |
663 | rpc = server->client; | |
664 | if (!IS_ERR(rpc)) | |
665 | rpc_killall_tasks(rpc); | |
f7b422b1 DH |
666 | } |
667 | ||
04dcd6e3 CL |
668 | /* |
669 | * Set the port number in an address. Be agnostic about the address family. | |
670 | */ | |
671 | static void nfs_set_port(struct sockaddr *sap, unsigned short port) | |
672 | { | |
673 | switch (sap->sa_family) { | |
674 | case AF_INET: { | |
675 | struct sockaddr_in *ap = (struct sockaddr_in *)sap; | |
676 | ap->sin_port = htons(port); | |
677 | break; | |
678 | } | |
679 | case AF_INET6: { | |
680 | struct sockaddr_in6 *ap = (struct sockaddr_in6 *)sap; | |
681 | ap->sin6_port = htons(port); | |
682 | break; | |
683 | } | |
684 | } | |
685 | } | |
686 | ||
fc50d58f | 687 | /* |
cdcd7f9a CL |
688 | * Sanity-check a server address provided by the mount command. |
689 | * | |
690 | * Address family must be initialized, and address must not be | |
691 | * the ANY address for that family. | |
fc50d58f CL |
692 | */ |
693 | static int nfs_verify_server_address(struct sockaddr *addr) | |
694 | { | |
695 | switch (addr->sa_family) { | |
696 | case AF_INET: { | |
cdcd7f9a | 697 | struct sockaddr_in *sa = (struct sockaddr_in *)addr; |
e6f1cebf | 698 | return sa->sin_addr.s_addr != htonl(INADDR_ANY); |
cdcd7f9a CL |
699 | } |
700 | case AF_INET6: { | |
701 | struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr; | |
702 | return !ipv6_addr_any(sa); | |
fc50d58f CL |
703 | } |
704 | } | |
705 | ||
706 | return 0; | |
707 | } | |
708 | ||
ce3b7e19 CL |
709 | static void nfs_parse_ipv4_address(char *string, size_t str_len, |
710 | struct sockaddr *sap, size_t *addr_len) | |
9412b927 | 711 | { |
ce3b7e19 CL |
712 | struct sockaddr_in *sin = (struct sockaddr_in *)sap; |
713 | u8 *addr = (u8 *)&sin->sin_addr.s_addr; | |
9412b927 | 714 | |
ce3b7e19 CL |
715 | if (str_len <= INET_ADDRSTRLEN) { |
716 | dfprintk(MOUNT, "NFS: parsing IPv4 address %*s\n", | |
717 | (int)str_len, string); | |
718 | ||
719 | sin->sin_family = AF_INET; | |
720 | *addr_len = sizeof(*sin); | |
721 | if (in4_pton(string, str_len, addr, '\0', NULL)) | |
3c7c7e48 | 722 | return; |
ce3b7e19 CL |
723 | } |
724 | ||
725 | sap->sa_family = AF_UNSPEC; | |
726 | *addr_len = 0; | |
727 | } | |
728 | ||
d8e7748a CL |
729 | #define IPV6_SCOPE_DELIMITER '%' |
730 | ||
ce3b7e19 | 731 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
d8e7748a CL |
732 | static void nfs_parse_ipv6_scope_id(const char *string, const size_t str_len, |
733 | const char *delim, | |
734 | struct sockaddr_in6 *sin6) | |
735 | { | |
736 | char *p; | |
737 | size_t len; | |
738 | ||
739 | if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)) | |
740 | return ; | |
741 | if (*delim != IPV6_SCOPE_DELIMITER) | |
742 | return; | |
743 | ||
744 | len = (string + str_len) - delim - 1; | |
745 | p = kstrndup(delim + 1, len, GFP_KERNEL); | |
746 | if (p) { | |
747 | unsigned long scope_id = 0; | |
748 | struct net_device *dev; | |
749 | ||
750 | dev = dev_get_by_name(&init_net, p); | |
751 | if (dev != NULL) { | |
752 | scope_id = dev->ifindex; | |
753 | dev_put(dev); | |
754 | } else { | |
755 | /* scope_id is set to zero on error */ | |
756 | strict_strtoul(p, 10, &scope_id); | |
757 | } | |
758 | ||
759 | kfree(p); | |
760 | sin6->sin6_scope_id = scope_id; | |
761 | dfprintk(MOUNT, "NFS: IPv6 scope ID = %lu\n", scope_id); | |
762 | } | |
763 | } | |
764 | ||
ce3b7e19 CL |
765 | static void nfs_parse_ipv6_address(char *string, size_t str_len, |
766 | struct sockaddr *sap, size_t *addr_len) | |
767 | { | |
768 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
769 | u8 *addr = (u8 *)&sin6->sin6_addr.in6_u; | |
d8e7748a | 770 | const char *delim; |
ce3b7e19 CL |
771 | |
772 | if (str_len <= INET6_ADDRSTRLEN) { | |
773 | dfprintk(MOUNT, "NFS: parsing IPv6 address %*s\n", | |
774 | (int)str_len, string); | |
3c7c7e48 | 775 | |
ce3b7e19 CL |
776 | sin6->sin6_family = AF_INET6; |
777 | *addr_len = sizeof(*sin6); | |
d8e7748a CL |
778 | if (in6_pton(string, str_len, addr, IPV6_SCOPE_DELIMITER, &delim)) { |
779 | nfs_parse_ipv6_scope_id(string, str_len, delim, sin6); | |
3c7c7e48 | 780 | return; |
d8e7748a | 781 | } |
3c7c7e48 | 782 | } |
9412b927 CL |
783 | |
784 | sap->sa_family = AF_UNSPEC; | |
ce3b7e19 CL |
785 | *addr_len = 0; |
786 | } | |
787 | #else | |
788 | static void nfs_parse_ipv6_address(char *string, size_t str_len, | |
789 | struct sockaddr *sap, size_t *addr_len) | |
790 | { | |
791 | sap->sa_family = AF_UNSPEC; | |
792 | *addr_len = 0; | |
793 | } | |
794 | #endif | |
795 | ||
796 | /* | |
797 | * Construct a sockaddr based on the contents of a string that contains | |
798 | * an IP address in presentation format. | |
799 | * | |
800 | * If there is a problem constructing the new sockaddr, set the address | |
801 | * family to AF_UNSPEC. | |
802 | */ | |
803 | static void nfs_parse_ip_address(char *string, size_t str_len, | |
804 | struct sockaddr *sap, size_t *addr_len) | |
805 | { | |
806 | unsigned int i, colons; | |
807 | ||
808 | colons = 0; | |
809 | for (i = 0; i < str_len; i++) | |
810 | if (string[i] == ':') | |
811 | colons++; | |
812 | ||
813 | if (colons >= 2) | |
814 | nfs_parse_ipv6_address(string, str_len, sap, addr_len); | |
815 | else | |
816 | nfs_parse_ipv4_address(string, str_len, sap, addr_len); | |
9412b927 CL |
817 | } |
818 | ||
bf0fd768 CL |
819 | /* |
820 | * Error-check and convert a string of mount options from user space into | |
821 | * a data structure | |
822 | */ | |
823 | static int nfs_parse_mount_options(char *raw, | |
824 | struct nfs_parsed_mount_data *mnt) | |
825 | { | |
f9c3a380 | 826 | char *p, *string, *secdata; |
f9c3a380 | 827 | int rc; |
bf0fd768 CL |
828 | |
829 | if (!raw) { | |
830 | dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); | |
831 | return 1; | |
832 | } | |
833 | dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); | |
834 | ||
f9c3a380 EP |
835 | secdata = alloc_secdata(); |
836 | if (!secdata) | |
837 | goto out_nomem; | |
838 | ||
839 | rc = security_sb_copy_data(raw, secdata); | |
840 | if (rc) | |
841 | goto out_security_failure; | |
842 | ||
843 | rc = security_sb_parse_opts_str(secdata, &mnt->lsm_opts); | |
844 | if (rc) | |
845 | goto out_security_failure; | |
846 | ||
847 | free_secdata(secdata); | |
848 | ||
bf0fd768 CL |
849 | while ((p = strsep(&raw, ",")) != NULL) { |
850 | substring_t args[MAX_OPT_ARGS]; | |
851 | int option, token; | |
852 | ||
853 | if (!*p) | |
854 | continue; | |
855 | ||
856 | dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); | |
857 | ||
858 | token = match_token(p, nfs_mount_option_tokens, args); | |
859 | switch (token) { | |
860 | case Opt_soft: | |
861 | mnt->flags |= NFS_MOUNT_SOFT; | |
862 | break; | |
863 | case Opt_hard: | |
864 | mnt->flags &= ~NFS_MOUNT_SOFT; | |
865 | break; | |
bf0fd768 CL |
866 | case Opt_posix: |
867 | mnt->flags |= NFS_MOUNT_POSIX; | |
868 | break; | |
869 | case Opt_noposix: | |
870 | mnt->flags &= ~NFS_MOUNT_POSIX; | |
871 | break; | |
872 | case Opt_cto: | |
873 | mnt->flags &= ~NFS_MOUNT_NOCTO; | |
874 | break; | |
875 | case Opt_nocto: | |
876 | mnt->flags |= NFS_MOUNT_NOCTO; | |
877 | break; | |
878 | case Opt_ac: | |
879 | mnt->flags &= ~NFS_MOUNT_NOAC; | |
880 | break; | |
881 | case Opt_noac: | |
882 | mnt->flags |= NFS_MOUNT_NOAC; | |
883 | break; | |
884 | case Opt_lock: | |
885 | mnt->flags &= ~NFS_MOUNT_NONLM; | |
886 | break; | |
887 | case Opt_nolock: | |
888 | mnt->flags |= NFS_MOUNT_NONLM; | |
889 | break; | |
890 | case Opt_v2: | |
891 | mnt->flags &= ~NFS_MOUNT_VER3; | |
892 | break; | |
893 | case Opt_v3: | |
894 | mnt->flags |= NFS_MOUNT_VER3; | |
895 | break; | |
896 | case Opt_udp: | |
897 | mnt->flags &= ~NFS_MOUNT_TCP; | |
0896a725 | 898 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 CL |
899 | mnt->timeo = 7; |
900 | mnt->retrans = 5; | |
901 | break; | |
902 | case Opt_tcp: | |
903 | mnt->flags |= NFS_MOUNT_TCP; | |
0896a725 | 904 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 CL |
905 | mnt->timeo = 600; |
906 | mnt->retrans = 2; | |
907 | break; | |
2cf7ff7a TT |
908 | case Opt_rdma: |
909 | mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ | |
910 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
911 | mnt->timeo = 600; | |
912 | mnt->retrans = 2; | |
913 | break; | |
bf0fd768 CL |
914 | case Opt_acl: |
915 | mnt->flags &= ~NFS_MOUNT_NOACL; | |
916 | break; | |
917 | case Opt_noacl: | |
918 | mnt->flags |= NFS_MOUNT_NOACL; | |
919 | break; | |
920 | case Opt_rdirplus: | |
921 | mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; | |
922 | break; | |
923 | case Opt_nordirplus: | |
924 | mnt->flags |= NFS_MOUNT_NORDIRPLUS; | |
925 | break; | |
75180df2 TM |
926 | case Opt_sharecache: |
927 | mnt->flags &= ~NFS_MOUNT_UNSHARED; | |
928 | break; | |
929 | case Opt_nosharecache: | |
930 | mnt->flags |= NFS_MOUNT_UNSHARED; | |
931 | break; | |
bf0fd768 CL |
932 | |
933 | case Opt_port: | |
934 | if (match_int(args, &option)) | |
935 | return 0; | |
936 | if (option < 0 || option > 65535) | |
937 | return 0; | |
f22d6d79 | 938 | mnt->nfs_server.port = option; |
bf0fd768 CL |
939 | break; |
940 | case Opt_rsize: | |
941 | if (match_int(args, &mnt->rsize)) | |
942 | return 0; | |
943 | break; | |
944 | case Opt_wsize: | |
945 | if (match_int(args, &mnt->wsize)) | |
946 | return 0; | |
947 | break; | |
948 | case Opt_bsize: | |
949 | if (match_int(args, &option)) | |
950 | return 0; | |
951 | if (option < 0) | |
952 | return 0; | |
953 | mnt->bsize = option; | |
954 | break; | |
955 | case Opt_timeo: | |
956 | if (match_int(args, &mnt->timeo)) | |
957 | return 0; | |
958 | break; | |
959 | case Opt_retrans: | |
960 | if (match_int(args, &mnt->retrans)) | |
961 | return 0; | |
962 | break; | |
963 | case Opt_acregmin: | |
964 | if (match_int(args, &mnt->acregmin)) | |
965 | return 0; | |
966 | break; | |
967 | case Opt_acregmax: | |
968 | if (match_int(args, &mnt->acregmax)) | |
969 | return 0; | |
970 | break; | |
971 | case Opt_acdirmin: | |
972 | if (match_int(args, &mnt->acdirmin)) | |
973 | return 0; | |
974 | break; | |
975 | case Opt_acdirmax: | |
976 | if (match_int(args, &mnt->acdirmax)) | |
977 | return 0; | |
978 | break; | |
979 | case Opt_actimeo: | |
980 | if (match_int(args, &option)) | |
981 | return 0; | |
982 | if (option < 0) | |
983 | return 0; | |
984 | mnt->acregmin = | |
985 | mnt->acregmax = | |
986 | mnt->acdirmin = | |
987 | mnt->acdirmax = option; | |
988 | break; | |
989 | case Opt_namelen: | |
990 | if (match_int(args, &mnt->namlen)) | |
991 | return 0; | |
992 | break; | |
993 | case Opt_mountport: | |
994 | if (match_int(args, &option)) | |
995 | return 0; | |
996 | if (option < 0 || option > 65535) | |
997 | return 0; | |
998 | mnt->mount_server.port = option; | |
999 | break; | |
bf0fd768 CL |
1000 | case Opt_mountvers: |
1001 | if (match_int(args, &option)) | |
1002 | return 0; | |
1003 | if (option < 0) | |
1004 | return 0; | |
1005 | mnt->mount_server.version = option; | |
1006 | break; | |
bf0fd768 CL |
1007 | case Opt_nfsvers: |
1008 | if (match_int(args, &option)) | |
1009 | return 0; | |
1010 | switch (option) { | |
1011 | case 2: | |
1012 | mnt->flags &= ~NFS_MOUNT_VER3; | |
1013 | break; | |
1014 | case 3: | |
1015 | mnt->flags |= NFS_MOUNT_VER3; | |
1016 | break; | |
1017 | default: | |
1018 | goto out_unrec_vers; | |
1019 | } | |
1020 | break; | |
1021 | ||
1022 | case Opt_sec: | |
1023 | string = match_strdup(args); | |
1024 | if (string == NULL) | |
1025 | goto out_nomem; | |
1026 | token = match_token(string, nfs_secflavor_tokens, args); | |
1027 | kfree(string); | |
1028 | ||
1029 | /* | |
1030 | * The flags setting is for v2/v3. The flavor_len | |
1031 | * setting is for v4. v2/v3 also need to know the | |
1032 | * difference between NULL and UNIX. | |
1033 | */ | |
1034 | switch (token) { | |
1035 | case Opt_sec_none: | |
1036 | mnt->flags &= ~NFS_MOUNT_SECFLAVOUR; | |
1037 | mnt->auth_flavor_len = 0; | |
1038 | mnt->auth_flavors[0] = RPC_AUTH_NULL; | |
1039 | break; | |
1040 | case Opt_sec_sys: | |
1041 | mnt->flags &= ~NFS_MOUNT_SECFLAVOUR; | |
1042 | mnt->auth_flavor_len = 0; | |
1043 | mnt->auth_flavors[0] = RPC_AUTH_UNIX; | |
1044 | break; | |
1045 | case Opt_sec_krb5: | |
1046 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
1047 | mnt->auth_flavor_len = 1; | |
1048 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5; | |
1049 | break; | |
1050 | case Opt_sec_krb5i: | |
1051 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
1052 | mnt->auth_flavor_len = 1; | |
1053 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I; | |
1054 | break; | |
1055 | case Opt_sec_krb5p: | |
1056 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
1057 | mnt->auth_flavor_len = 1; | |
1058 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P; | |
1059 | break; | |
1060 | case Opt_sec_lkey: | |
1061 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
1062 | mnt->auth_flavor_len = 1; | |
1063 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY; | |
1064 | break; | |
1065 | case Opt_sec_lkeyi: | |
1066 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
1067 | mnt->auth_flavor_len = 1; | |
1068 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI; | |
1069 | break; | |
1070 | case Opt_sec_lkeyp: | |
1071 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
1072 | mnt->auth_flavor_len = 1; | |
1073 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP; | |
1074 | break; | |
1075 | case Opt_sec_spkm: | |
1076 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
1077 | mnt->auth_flavor_len = 1; | |
1078 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM; | |
1079 | break; | |
1080 | case Opt_sec_spkmi: | |
1081 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
1082 | mnt->auth_flavor_len = 1; | |
1083 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI; | |
1084 | break; | |
1085 | case Opt_sec_spkmp: | |
1086 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
1087 | mnt->auth_flavor_len = 1; | |
1088 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP; | |
1089 | break; | |
1090 | default: | |
1091 | goto out_unrec_sec; | |
1092 | } | |
1093 | break; | |
1094 | case Opt_proto: | |
1095 | string = match_strdup(args); | |
1096 | if (string == NULL) | |
1097 | goto out_nomem; | |
1098 | token = match_token(string, | |
1099 | nfs_xprt_protocol_tokens, args); | |
1100 | kfree(string); | |
1101 | ||
1102 | switch (token) { | |
fdb66ff4 | 1103 | case Opt_xprt_udp: |
bf0fd768 | 1104 | mnt->flags &= ~NFS_MOUNT_TCP; |
0896a725 | 1105 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 CL |
1106 | mnt->timeo = 7; |
1107 | mnt->retrans = 5; | |
1108 | break; | |
fdb66ff4 | 1109 | case Opt_xprt_tcp: |
bf0fd768 | 1110 | mnt->flags |= NFS_MOUNT_TCP; |
0896a725 | 1111 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 CL |
1112 | mnt->timeo = 600; |
1113 | mnt->retrans = 2; | |
1114 | break; | |
2cf7ff7a TT |
1115 | case Opt_xprt_rdma: |
1116 | /* vector side protocols to TCP */ | |
1117 | mnt->flags |= NFS_MOUNT_TCP; | |
1118 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
1119 | mnt->timeo = 600; | |
1120 | mnt->retrans = 2; | |
1121 | break; | |
bf0fd768 CL |
1122 | default: |
1123 | goto out_unrec_xprt; | |
1124 | } | |
1125 | break; | |
1126 | case Opt_mountproto: | |
1127 | string = match_strdup(args); | |
1128 | if (string == NULL) | |
1129 | goto out_nomem; | |
1130 | token = match_token(string, | |
1131 | nfs_xprt_protocol_tokens, args); | |
1132 | kfree(string); | |
1133 | ||
1134 | switch (token) { | |
fdb66ff4 | 1135 | case Opt_xprt_udp: |
0896a725 | 1136 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 | 1137 | break; |
fdb66ff4 | 1138 | case Opt_xprt_tcp: |
0896a725 | 1139 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1140 | break; |
2cf7ff7a | 1141 | case Opt_xprt_rdma: /* not used for side protocols */ |
bf0fd768 CL |
1142 | default: |
1143 | goto out_unrec_xprt; | |
1144 | } | |
1145 | break; | |
1146 | case Opt_addr: | |
1147 | string = match_strdup(args); | |
1148 | if (string == NULL) | |
1149 | goto out_nomem; | |
ce3b7e19 CL |
1150 | nfs_parse_ip_address(string, strlen(string), |
1151 | (struct sockaddr *) | |
1152 | &mnt->nfs_server.address, | |
1153 | &mnt->nfs_server.addrlen); | |
bf0fd768 CL |
1154 | kfree(string); |
1155 | break; | |
1156 | case Opt_clientaddr: | |
1157 | string = match_strdup(args); | |
1158 | if (string == NULL) | |
1159 | goto out_nomem; | |
fc601477 | 1160 | kfree(mnt->client_address); |
bf0fd768 CL |
1161 | mnt->client_address = string; |
1162 | break; | |
33832034 CL |
1163 | case Opt_mounthost: |
1164 | string = match_strdup(args); | |
1165 | if (string == NULL) | |
1166 | goto out_nomem; | |
fc601477 | 1167 | kfree(mnt->mount_server.hostname); |
33832034 CL |
1168 | mnt->mount_server.hostname = string; |
1169 | break; | |
0ac83779 | 1170 | case Opt_mountaddr: |
bf0fd768 CL |
1171 | string = match_strdup(args); |
1172 | if (string == NULL) | |
1173 | goto out_nomem; | |
ce3b7e19 CL |
1174 | nfs_parse_ip_address(string, strlen(string), |
1175 | (struct sockaddr *) | |
1176 | &mnt->mount_server.address, | |
1177 | &mnt->mount_server.addrlen); | |
bf0fd768 CL |
1178 | kfree(string); |
1179 | break; | |
1180 | ||
1181 | case Opt_userspace: | |
1182 | case Opt_deprecated: | |
d33e4dfe CL |
1183 | dfprintk(MOUNT, "NFS: ignoring mount option " |
1184 | "'%s'\n", p); | |
bf0fd768 CL |
1185 | break; |
1186 | ||
1187 | default: | |
1188 | goto out_unknown; | |
1189 | } | |
1190 | } | |
1191 | ||
f22d6d79 CL |
1192 | nfs_set_port((struct sockaddr *)&mnt->nfs_server.address, |
1193 | mnt->nfs_server.port); | |
04dcd6e3 | 1194 | |
bf0fd768 CL |
1195 | return 1; |
1196 | ||
1197 | out_nomem: | |
1198 | printk(KERN_INFO "NFS: not enough memory to parse option\n"); | |
1199 | return 0; | |
f9c3a380 EP |
1200 | out_security_failure: |
1201 | free_secdata(secdata); | |
1202 | printk(KERN_INFO "NFS: security options invalid: %d\n", rc); | |
1203 | return 0; | |
bf0fd768 CL |
1204 | out_unrec_vers: |
1205 | printk(KERN_INFO "NFS: unrecognized NFS version number\n"); | |
1206 | return 0; | |
1207 | ||
1208 | out_unrec_xprt: | |
1209 | printk(KERN_INFO "NFS: unrecognized transport protocol\n"); | |
1210 | return 0; | |
1211 | ||
1212 | out_unrec_sec: | |
1213 | printk(KERN_INFO "NFS: unrecognized security flavor\n"); | |
1214 | return 0; | |
1215 | ||
1216 | out_unknown: | |
1217 | printk(KERN_INFO "NFS: unknown mount option: %s\n", p); | |
1218 | return 0; | |
1219 | } | |
1220 | ||
0076d7b7 CL |
1221 | /* |
1222 | * Use the remote server's MOUNT service to request the NFS file handle | |
1223 | * corresponding to the provided path. | |
1224 | */ | |
1225 | static int nfs_try_mount(struct nfs_parsed_mount_data *args, | |
1226 | struct nfs_fh *root_fh) | |
1227 | { | |
4c568017 | 1228 | struct sockaddr *sap = (struct sockaddr *)&args->mount_server.address; |
33832034 | 1229 | char *hostname; |
4c568017 | 1230 | int status; |
0076d7b7 CL |
1231 | |
1232 | if (args->mount_server.version == 0) { | |
1233 | if (args->flags & NFS_MOUNT_VER3) | |
1234 | args->mount_server.version = NFS_MNT3_VERSION; | |
1235 | else | |
1236 | args->mount_server.version = NFS_MNT_VERSION; | |
1237 | } | |
1238 | ||
33832034 CL |
1239 | if (args->mount_server.hostname) |
1240 | hostname = args->mount_server.hostname; | |
1241 | else | |
1242 | hostname = args->nfs_server.hostname; | |
1243 | ||
0076d7b7 CL |
1244 | /* |
1245 | * Construct the mount server's address. | |
1246 | */ | |
4c568017 CL |
1247 | if (args->mount_server.address.ss_family == AF_UNSPEC) { |
1248 | memcpy(sap, &args->nfs_server.address, | |
1249 | args->nfs_server.addrlen); | |
1250 | args->mount_server.addrlen = args->nfs_server.addrlen; | |
1251 | } | |
1252 | ||
aad70007 JL |
1253 | /* |
1254 | * autobind will be used if mount_server.port == 0 | |
1255 | */ | |
4c568017 | 1256 | nfs_set_port(sap, args->mount_server.port); |
0076d7b7 CL |
1257 | |
1258 | /* | |
1259 | * Now ask the mount server to map our export path | |
1260 | * to a file handle. | |
1261 | */ | |
4c568017 CL |
1262 | status = nfs_mount(sap, |
1263 | args->mount_server.addrlen, | |
33832034 | 1264 | hostname, |
0076d7b7 CL |
1265 | args->nfs_server.export_path, |
1266 | args->mount_server.version, | |
1267 | args->mount_server.protocol, | |
1268 | root_fh); | |
efd8340b CL |
1269 | if (status == 0) |
1270 | return 0; | |
0076d7b7 | 1271 | |
396cee97 | 1272 | dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n", |
33832034 | 1273 | hostname, status); |
0076d7b7 CL |
1274 | return status; |
1275 | } | |
1276 | ||
d1aa0825 CL |
1277 | static int nfs_parse_simple_hostname(const char *dev_name, |
1278 | char **hostname, size_t maxnamlen, | |
1279 | char **export_path, size_t maxpathlen) | |
dc045898 CL |
1280 | { |
1281 | size_t len; | |
1282 | char *colon, *comma; | |
1283 | ||
1284 | colon = strchr(dev_name, ':'); | |
1285 | if (colon == NULL) | |
1286 | goto out_bad_devname; | |
1287 | ||
1288 | len = colon - dev_name; | |
1289 | if (len > maxnamlen) | |
1290 | goto out_hostname; | |
1291 | ||
1292 | /* N.B. caller will free nfs_server.hostname in all cases */ | |
1293 | *hostname = kstrndup(dev_name, len, GFP_KERNEL); | |
1294 | if (!*hostname) | |
1295 | goto out_nomem; | |
1296 | ||
1297 | /* kill possible hostname list: not supported */ | |
1298 | comma = strchr(*hostname, ','); | |
1299 | if (comma != NULL) { | |
1300 | if (comma == *hostname) | |
1301 | goto out_bad_devname; | |
1302 | *comma = '\0'; | |
1303 | } | |
1304 | ||
1305 | colon++; | |
1306 | len = strlen(colon); | |
1307 | if (len > maxpathlen) | |
1308 | goto out_path; | |
1309 | *export_path = kstrndup(colon, len, GFP_KERNEL); | |
1310 | if (!*export_path) | |
1311 | goto out_nomem; | |
1312 | ||
1313 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path); | |
1314 | return 0; | |
1315 | ||
1316 | out_bad_devname: | |
1317 | dfprintk(MOUNT, "NFS: device name not in host:path format\n"); | |
1318 | return -EINVAL; | |
1319 | ||
1320 | out_nomem: | |
1321 | dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); | |
1322 | return -ENOMEM; | |
1323 | ||
1324 | out_hostname: | |
1325 | dfprintk(MOUNT, "NFS: server hostname too long\n"); | |
1326 | return -ENAMETOOLONG; | |
1327 | ||
1328 | out_path: | |
1329 | dfprintk(MOUNT, "NFS: export pathname too long\n"); | |
1330 | return -ENAMETOOLONG; | |
1331 | } | |
1332 | ||
d1aa0825 CL |
1333 | /* |
1334 | * Hostname has square brackets around it because it contains one or | |
1335 | * more colons. We look for the first closing square bracket, and a | |
1336 | * colon must follow it. | |
1337 | */ | |
1338 | static int nfs_parse_protected_hostname(const char *dev_name, | |
1339 | char **hostname, size_t maxnamlen, | |
1340 | char **export_path, size_t maxpathlen) | |
1341 | { | |
1342 | size_t len; | |
1343 | char *start, *end; | |
1344 | ||
1345 | start = (char *)(dev_name + 1); | |
1346 | ||
1347 | end = strchr(start, ']'); | |
1348 | if (end == NULL) | |
1349 | goto out_bad_devname; | |
1350 | if (*(end + 1) != ':') | |
1351 | goto out_bad_devname; | |
1352 | ||
1353 | len = end - start; | |
1354 | if (len > maxnamlen) | |
1355 | goto out_hostname; | |
1356 | ||
1357 | /* N.B. caller will free nfs_server.hostname in all cases */ | |
1358 | *hostname = kstrndup(start, len, GFP_KERNEL); | |
1359 | if (*hostname == NULL) | |
1360 | goto out_nomem; | |
1361 | ||
1362 | end += 2; | |
1363 | len = strlen(end); | |
1364 | if (len > maxpathlen) | |
1365 | goto out_path; | |
1366 | *export_path = kstrndup(end, len, GFP_KERNEL); | |
1367 | if (!*export_path) | |
1368 | goto out_nomem; | |
1369 | ||
1370 | return 0; | |
1371 | ||
1372 | out_bad_devname: | |
1373 | dfprintk(MOUNT, "NFS: device name not in host:path format\n"); | |
1374 | return -EINVAL; | |
1375 | ||
1376 | out_nomem: | |
1377 | dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); | |
1378 | return -ENOMEM; | |
1379 | ||
1380 | out_hostname: | |
1381 | dfprintk(MOUNT, "NFS: server hostname too long\n"); | |
1382 | return -ENAMETOOLONG; | |
1383 | ||
1384 | out_path: | |
1385 | dfprintk(MOUNT, "NFS: export pathname too long\n"); | |
1386 | return -ENAMETOOLONG; | |
1387 | } | |
1388 | ||
1389 | /* | |
1390 | * Split "dev_name" into "hostname:export_path". | |
1391 | * | |
1392 | * The leftmost colon demarks the split between the server's hostname | |
1393 | * and the export path. If the hostname starts with a left square | |
1394 | * bracket, then it may contain colons. | |
1395 | * | |
1396 | * Note: caller frees hostname and export path, even on error. | |
1397 | */ | |
1398 | static int nfs_parse_devname(const char *dev_name, | |
1399 | char **hostname, size_t maxnamlen, | |
1400 | char **export_path, size_t maxpathlen) | |
1401 | { | |
1402 | if (*dev_name == '[') | |
1403 | return nfs_parse_protected_hostname(dev_name, | |
1404 | hostname, maxnamlen, | |
1405 | export_path, maxpathlen); | |
1406 | ||
1407 | return nfs_parse_simple_hostname(dev_name, | |
1408 | hostname, maxnamlen, | |
1409 | export_path, maxpathlen); | |
1410 | } | |
1411 | ||
f7b422b1 | 1412 | /* |
54ceac45 DH |
1413 | * Validate the NFS2/NFS3 mount data |
1414 | * - fills in the mount root filehandle | |
136d558c CL |
1415 | * |
1416 | * For option strings, user space handles the following behaviors: | |
1417 | * | |
1418 | * + DNS: mapping server host name to IP address ("addr=" option) | |
1419 | * | |
1420 | * + failure mode: how to behave if a mount request can't be handled | |
1421 | * immediately ("fg/bg" option) | |
1422 | * | |
1423 | * + retry: how often to retry a mount request ("retry=" option) | |
1424 | * | |
1425 | * + breaking back: trying proto=udp after proto=tcp, v2 after v3, | |
1426 | * mountproto=tcp after mountproto=udp, and so on | |
f7b422b1 | 1427 | */ |
2283f8d6 TT |
1428 | static int nfs_validate_mount_data(void *options, |
1429 | struct nfs_parsed_mount_data *args, | |
136d558c CL |
1430 | struct nfs_fh *mntfh, |
1431 | const char *dev_name) | |
f7b422b1 | 1432 | { |
2283f8d6 | 1433 | struct nfs_mount_data *data = (struct nfs_mount_data *)options; |
136d558c | 1434 | |
5df36e78 CL |
1435 | if (data == NULL) |
1436 | goto out_no_data; | |
f7b422b1 | 1437 | |
2283f8d6 TT |
1438 | args->flags = (NFS_MOUNT_VER3 | NFS_MOUNT_TCP); |
1439 | args->rsize = NFS_MAX_FILE_IO_SIZE; | |
1440 | args->wsize = NFS_MAX_FILE_IO_SIZE; | |
1441 | args->timeo = 600; | |
1442 | args->retrans = 2; | |
1443 | args->acregmin = 3; | |
1444 | args->acregmax = 60; | |
1445 | args->acdirmin = 30; | |
1446 | args->acdirmax = 60; | |
f22d6d79 | 1447 | args->mount_server.port = 0; /* autobind unless user sets port */ |
0896a725 | 1448 | args->mount_server.protocol = XPRT_TRANSPORT_UDP; |
f22d6d79 | 1449 | args->nfs_server.port = 0; /* autobind unless user sets port */ |
0896a725 | 1450 | args->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
2283f8d6 | 1451 | |
54ceac45 | 1452 | switch (data->version) { |
5df36e78 CL |
1453 | case 1: |
1454 | data->namlen = 0; | |
1455 | case 2: | |
1456 | data->bsize = 0; | |
1457 | case 3: | |
1458 | if (data->flags & NFS_MOUNT_VER3) | |
1459 | goto out_no_v3; | |
1460 | data->root.size = NFS2_FHSIZE; | |
1461 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
1462 | case 4: | |
1463 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1464 | goto out_no_sec; | |
1465 | case 5: | |
1466 | memset(data->context, 0, sizeof(data->context)); | |
1467 | case 6: | |
b7e24457 TM |
1468 | if (data->flags & NFS_MOUNT_VER3) { |
1469 | if (data->root.size > NFS3_FHSIZE || data->root.size == 0) | |
1470 | goto out_invalid_fh; | |
5df36e78 | 1471 | mntfh->size = data->root.size; |
b7e24457 | 1472 | } else |
5df36e78 CL |
1473 | mntfh->size = NFS2_FHSIZE; |
1474 | ||
5df36e78 CL |
1475 | |
1476 | memcpy(mntfh->data, data->root.data, mntfh->size); | |
1477 | if (mntfh->size < sizeof(mntfh->data)) | |
1478 | memset(mntfh->data + mntfh->size, 0, | |
1479 | sizeof(mntfh->data) - mntfh->size); | |
6e88e061 | 1480 | |
2283f8d6 TT |
1481 | /* |
1482 | * Translate to nfs_parsed_mount_data, which nfs_fill_super | |
1483 | * can deal with. | |
1484 | */ | |
1485 | args->flags = data->flags; | |
1486 | args->rsize = data->rsize; | |
1487 | args->wsize = data->wsize; | |
2283f8d6 TT |
1488 | args->timeo = data->timeo; |
1489 | args->retrans = data->retrans; | |
1490 | args->acregmin = data->acregmin; | |
1491 | args->acregmax = data->acregmax; | |
1492 | args->acdirmin = data->acdirmin; | |
1493 | args->acdirmax = data->acdirmax; | |
4c568017 CL |
1494 | |
1495 | memcpy(&args->nfs_server.address, &data->addr, | |
1496 | sizeof(data->addr)); | |
1497 | args->nfs_server.addrlen = sizeof(data->addr); | |
1498 | if (!nfs_verify_server_address((struct sockaddr *) | |
1499 | &args->nfs_server.address)) | |
1500 | goto out_no_address; | |
1501 | ||
2283f8d6 | 1502 | if (!(data->flags & NFS_MOUNT_TCP)) |
0896a725 | 1503 | args->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
2283f8d6 TT |
1504 | /* N.B. caller will free nfs_server.hostname in all cases */ |
1505 | args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); | |
1506 | args->namlen = data->namlen; | |
1507 | args->bsize = data->bsize; | |
1508 | args->auth_flavors[0] = data->pseudoflavor; | |
63649bd7 CG |
1509 | if (!args->nfs_server.hostname) |
1510 | goto out_nomem; | |
f9c3a380 EP |
1511 | |
1512 | /* | |
1513 | * The legacy version 6 binary mount data from userspace has a | |
1514 | * field used only to transport selinux information into the | |
1515 | * the kernel. To continue to support that functionality we | |
1516 | * have a touch of selinux knowledge here in the NFS code. The | |
1517 | * userspace code converted context=blah to just blah so we are | |
1518 | * converting back to the full string selinux understands. | |
1519 | */ | |
1520 | if (data->context[0]){ | |
1521 | #ifdef CONFIG_SECURITY_SELINUX | |
1522 | int rc; | |
1523 | char *opts_str = kmalloc(sizeof(data->context) + 8, GFP_KERNEL); | |
1524 | if (!opts_str) | |
1525 | return -ENOMEM; | |
1526 | strcpy(opts_str, "context="); | |
1527 | data->context[NFS_MAX_CONTEXT_LEN] = '\0'; | |
1528 | strcat(opts_str, &data->context[0]); | |
1529 | rc = security_sb_parse_opts_str(opts_str, &args->lsm_opts); | |
1530 | kfree(opts_str); | |
1531 | if (rc) | |
1532 | return rc; | |
1533 | #else | |
1534 | return -EINVAL; | |
1535 | #endif | |
1536 | } | |
1537 | ||
5df36e78 | 1538 | break; |
136d558c | 1539 | default: { |
136d558c | 1540 | int status; |
136d558c | 1541 | |
2283f8d6 TT |
1542 | if (nfs_parse_mount_options((char *)options, args) == 0) |
1543 | return -EINVAL; | |
136d558c | 1544 | |
6e88e061 CL |
1545 | if (!nfs_verify_server_address((struct sockaddr *) |
1546 | &args->nfs_server.address)) | |
1547 | goto out_no_address; | |
1548 | ||
dc045898 CL |
1549 | status = nfs_parse_devname(dev_name, |
1550 | &args->nfs_server.hostname, | |
1551 | PAGE_SIZE, | |
1552 | &args->nfs_server.export_path, | |
1553 | NFS_MAXPATHLEN); | |
1554 | if (!status) | |
1555 | status = nfs_try_mount(args, mntfh); | |
136d558c | 1556 | |
dc045898 CL |
1557 | kfree(args->nfs_server.export_path); |
1558 | args->nfs_server.export_path = NULL; | |
136d558c | 1559 | |
136d558c | 1560 | if (status) |
fdc6e2c8 | 1561 | return status; |
136d558c | 1562 | |
136d558c CL |
1563 | break; |
1564 | } | |
f7b422b1 | 1565 | } |
54ceac45 | 1566 | |
2283f8d6 TT |
1567 | if (!(args->flags & NFS_MOUNT_SECFLAVOUR)) |
1568 | args->auth_flavors[0] = RPC_AUTH_UNIX; | |
36b15c54 | 1569 | |
54ceac45 | 1570 | #ifndef CONFIG_NFS_V3 |
2283f8d6 | 1571 | if (args->flags & NFS_MOUNT_VER3) |
5df36e78 CL |
1572 | goto out_v3_not_compiled; |
1573 | #endif /* !CONFIG_NFS_V3 */ | |
f7b422b1 | 1574 | |
5df36e78 | 1575 | return 0; |
f7b422b1 | 1576 | |
5df36e78 CL |
1577 | out_no_data: |
1578 | dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); | |
1579 | return -EINVAL; | |
54ceac45 | 1580 | |
5df36e78 CL |
1581 | out_no_v3: |
1582 | dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", | |
1583 | data->version); | |
1584 | return -EINVAL; | |
f7b422b1 | 1585 | |
5df36e78 CL |
1586 | out_no_sec: |
1587 | dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); | |
1588 | return -EINVAL; | |
1589 | ||
5df36e78 CL |
1590 | #ifndef CONFIG_NFS_V3 |
1591 | out_v3_not_compiled: | |
1592 | dfprintk(MOUNT, "NFS: NFSv3 is not compiled into kernel\n"); | |
1593 | return -EPROTONOSUPPORT; | |
1594 | #endif /* !CONFIG_NFS_V3 */ | |
1595 | ||
63649bd7 CG |
1596 | out_nomem: |
1597 | dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); | |
1598 | return -ENOMEM; | |
1599 | ||
5df36e78 CL |
1600 | out_no_address: |
1601 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); | |
1602 | return -EINVAL; | |
1603 | ||
1604 | out_invalid_fh: | |
1605 | dfprintk(MOUNT, "NFS: invalid root filehandle\n"); | |
1606 | return -EINVAL; | |
f7b422b1 DH |
1607 | } |
1608 | ||
48b605f8 JL |
1609 | static int |
1610 | nfs_compare_remount_data(struct nfs_server *nfss, | |
1611 | struct nfs_parsed_mount_data *data) | |
1612 | { | |
1613 | if (data->flags != nfss->flags || | |
1614 | data->rsize != nfss->rsize || | |
1615 | data->wsize != nfss->wsize || | |
1616 | data->retrans != nfss->client->cl_timeout->to_retries || | |
1617 | data->auth_flavors[0] != nfss->client->cl_auth->au_flavor || | |
1618 | data->acregmin != nfss->acregmin / HZ || | |
1619 | data->acregmax != nfss->acregmax / HZ || | |
1620 | data->acdirmin != nfss->acdirmin / HZ || | |
1621 | data->acdirmax != nfss->acdirmax / HZ || | |
1622 | data->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) || | |
1623 | data->nfs_server.addrlen != nfss->nfs_client->cl_addrlen || | |
1624 | memcmp(&data->nfs_server.address, &nfss->nfs_client->cl_addr, | |
1625 | data->nfs_server.addrlen) != 0) | |
1626 | return -EINVAL; | |
1627 | ||
1628 | return 0; | |
1629 | } | |
1630 | ||
1631 | static int | |
1632 | nfs_remount(struct super_block *sb, int *flags, char *raw_data) | |
1633 | { | |
1634 | int error; | |
1635 | struct nfs_server *nfss = sb->s_fs_info; | |
1636 | struct nfs_parsed_mount_data *data; | |
1637 | struct nfs_mount_data *options = (struct nfs_mount_data *)raw_data; | |
1638 | struct nfs4_mount_data *options4 = (struct nfs4_mount_data *)raw_data; | |
cd100725 | 1639 | u32 nfsvers = nfss->nfs_client->rpc_ops->version; |
48b605f8 JL |
1640 | |
1641 | /* | |
1642 | * Userspace mount programs that send binary options generally send | |
1643 | * them populated with default values. We have no way to know which | |
1644 | * ones were explicitly specified. Fall back to legacy behavior and | |
1645 | * just return success. | |
1646 | */ | |
cd100725 TM |
1647 | if ((nfsvers == 4 && options4->version == 1) || |
1648 | (nfsvers <= 3 && options->version >= 1 && | |
48b605f8 JL |
1649 | options->version <= 6)) |
1650 | return 0; | |
1651 | ||
1652 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
1653 | if (data == NULL) | |
1654 | return -ENOMEM; | |
1655 | ||
1656 | /* fill out struct with values from existing mount */ | |
1657 | data->flags = nfss->flags; | |
1658 | data->rsize = nfss->rsize; | |
1659 | data->wsize = nfss->wsize; | |
1660 | data->retrans = nfss->client->cl_timeout->to_retries; | |
1661 | data->auth_flavors[0] = nfss->client->cl_auth->au_flavor; | |
1662 | data->acregmin = nfss->acregmin / HZ; | |
1663 | data->acregmax = nfss->acregmax / HZ; | |
1664 | data->acdirmin = nfss->acdirmin / HZ; | |
1665 | data->acdirmax = nfss->acdirmax / HZ; | |
1666 | data->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; | |
1667 | data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; | |
1668 | memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr, | |
1669 | data->nfs_server.addrlen); | |
1670 | ||
1671 | /* overwrite those values with any that were specified */ | |
1672 | error = nfs_parse_mount_options((char *)options, data); | |
1673 | if (error < 0) | |
1674 | goto out; | |
1675 | ||
1676 | /* compare new mount options with old ones */ | |
1677 | error = nfs_compare_remount_data(nfss, data); | |
1678 | out: | |
1679 | kfree(data); | |
1680 | return error; | |
1681 | } | |
1682 | ||
f7b422b1 | 1683 | /* |
54ceac45 | 1684 | * Initialise the common bits of the superblock |
f7b422b1 | 1685 | */ |
54ceac45 | 1686 | static inline void nfs_initialise_sb(struct super_block *sb) |
f7b422b1 | 1687 | { |
54ceac45 | 1688 | struct nfs_server *server = NFS_SB(sb); |
5006a76c | 1689 | |
54ceac45 | 1690 | sb->s_magic = NFS_SUPER_MAGIC; |
f7b422b1 | 1691 | |
54ceac45 DH |
1692 | /* We probably want something more informative here */ |
1693 | snprintf(sb->s_id, sizeof(sb->s_id), | |
1694 | "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev)); | |
5006a76c | 1695 | |
54ceac45 DH |
1696 | if (sb->s_blocksize == 0) |
1697 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
1698 | &sb->s_blocksize_bits); | |
f7b422b1 | 1699 | |
54ceac45 DH |
1700 | if (server->flags & NFS_MOUNT_NOAC) |
1701 | sb->s_flags |= MS_SYNCHRONOUS; | |
f7b422b1 | 1702 | |
54ceac45 | 1703 | nfs_super_set_maxbytes(sb, server->maxfilesize); |
f7b422b1 DH |
1704 | } |
1705 | ||
1706 | /* | |
54ceac45 | 1707 | * Finish setting up an NFS2/3 superblock |
f7b422b1 | 1708 | */ |
2283f8d6 TT |
1709 | static void nfs_fill_super(struct super_block *sb, |
1710 | struct nfs_parsed_mount_data *data) | |
f7b422b1 DH |
1711 | { |
1712 | struct nfs_server *server = NFS_SB(sb); | |
5006a76c | 1713 | |
54ceac45 DH |
1714 | sb->s_blocksize_bits = 0; |
1715 | sb->s_blocksize = 0; | |
1716 | if (data->bsize) | |
1717 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); | |
f7b422b1 | 1718 | |
54ceac45 DH |
1719 | if (server->flags & NFS_MOUNT_VER3) { |
1720 | /* The VFS shouldn't apply the umask to mode bits. We will do | |
1721 | * so ourselves when necessary. | |
1722 | */ | |
1723 | sb->s_flags |= MS_POSIXACL; | |
1724 | sb->s_time_gran = 1; | |
816724e6 | 1725 | } |
54ceac45 DH |
1726 | |
1727 | sb->s_op = &nfs_sops; | |
1728 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1729 | } |
1730 | ||
1731 | /* | |
54ceac45 | 1732 | * Finish setting up a cloned NFS2/3 superblock |
f7b422b1 | 1733 | */ |
54ceac45 DH |
1734 | static void nfs_clone_super(struct super_block *sb, |
1735 | const struct super_block *old_sb) | |
f7b422b1 | 1736 | { |
54ceac45 DH |
1737 | struct nfs_server *server = NFS_SB(sb); |
1738 | ||
1739 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; | |
1740 | sb->s_blocksize = old_sb->s_blocksize; | |
1741 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 1742 | |
f7b422b1 | 1743 | if (server->flags & NFS_MOUNT_VER3) { |
54ceac45 DH |
1744 | /* The VFS shouldn't apply the umask to mode bits. We will do |
1745 | * so ourselves when necessary. | |
f7b422b1 DH |
1746 | */ |
1747 | sb->s_flags |= MS_POSIXACL; | |
f7b422b1 | 1748 | sb->s_time_gran = 1; |
f7b422b1 DH |
1749 | } |
1750 | ||
54ceac45 DH |
1751 | sb->s_op = old_sb->s_op; |
1752 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1753 | } |
1754 | ||
275a5d24 TM |
1755 | #define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS) |
1756 | ||
1757 | static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags) | |
1758 | { | |
1759 | const struct nfs_server *a = s->s_fs_info; | |
1760 | const struct rpc_clnt *clnt_a = a->client; | |
1761 | const struct rpc_clnt *clnt_b = b->client; | |
1762 | ||
1763 | if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK)) | |
1764 | goto Ebusy; | |
1765 | if (a->nfs_client != b->nfs_client) | |
1766 | goto Ebusy; | |
1767 | if (a->flags != b->flags) | |
1768 | goto Ebusy; | |
1769 | if (a->wsize != b->wsize) | |
1770 | goto Ebusy; | |
1771 | if (a->rsize != b->rsize) | |
1772 | goto Ebusy; | |
1773 | if (a->acregmin != b->acregmin) | |
1774 | goto Ebusy; | |
1775 | if (a->acregmax != b->acregmax) | |
1776 | goto Ebusy; | |
1777 | if (a->acdirmin != b->acdirmin) | |
1778 | goto Ebusy; | |
1779 | if (a->acdirmax != b->acdirmax) | |
1780 | goto Ebusy; | |
1781 | if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) | |
1782 | goto Ebusy; | |
e89a5a43 | 1783 | return 1; |
275a5d24 | 1784 | Ebusy: |
e89a5a43 TM |
1785 | return 0; |
1786 | } | |
1787 | ||
1788 | struct nfs_sb_mountdata { | |
1789 | struct nfs_server *server; | |
1790 | int mntflags; | |
1791 | }; | |
1792 | ||
1793 | static int nfs_set_super(struct super_block *s, void *data) | |
1794 | { | |
1795 | struct nfs_sb_mountdata *sb_mntdata = data; | |
1796 | struct nfs_server *server = sb_mntdata->server; | |
1797 | int ret; | |
1798 | ||
1799 | s->s_flags = sb_mntdata->mntflags; | |
1800 | s->s_fs_info = server; | |
1801 | ret = set_anon_super(s, server); | |
1802 | if (ret == 0) | |
1803 | server->s_dev = s->s_dev; | |
1804 | return ret; | |
1805 | } | |
1806 | ||
fd00a8ff CL |
1807 | static int nfs_compare_super_address(struct nfs_server *server1, |
1808 | struct nfs_server *server2) | |
1809 | { | |
1810 | struct sockaddr *sap1, *sap2; | |
1811 | ||
1812 | sap1 = (struct sockaddr *)&server1->nfs_client->cl_addr; | |
1813 | sap2 = (struct sockaddr *)&server2->nfs_client->cl_addr; | |
1814 | ||
1815 | if (sap1->sa_family != sap2->sa_family) | |
1816 | return 0; | |
1817 | ||
1818 | switch (sap1->sa_family) { | |
1819 | case AF_INET: { | |
1820 | struct sockaddr_in *sin1 = (struct sockaddr_in *)sap1; | |
1821 | struct sockaddr_in *sin2 = (struct sockaddr_in *)sap2; | |
1822 | if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) | |
1823 | return 0; | |
1824 | if (sin1->sin_port != sin2->sin_port) | |
1825 | return 0; | |
1826 | break; | |
1827 | } | |
1828 | case AF_INET6: { | |
1829 | struct sockaddr_in6 *sin1 = (struct sockaddr_in6 *)sap1; | |
1830 | struct sockaddr_in6 *sin2 = (struct sockaddr_in6 *)sap2; | |
1831 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) | |
1832 | return 0; | |
1833 | if (sin1->sin6_port != sin2->sin6_port) | |
1834 | return 0; | |
1835 | break; | |
1836 | } | |
1837 | default: | |
1838 | return 0; | |
1839 | } | |
1840 | ||
1841 | return 1; | |
1842 | } | |
1843 | ||
e89a5a43 TM |
1844 | static int nfs_compare_super(struct super_block *sb, void *data) |
1845 | { | |
1846 | struct nfs_sb_mountdata *sb_mntdata = data; | |
1847 | struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb); | |
1848 | int mntflags = sb_mntdata->mntflags; | |
1849 | ||
fd00a8ff | 1850 | if (!nfs_compare_super_address(old, server)) |
e89a5a43 TM |
1851 | return 0; |
1852 | /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */ | |
1853 | if (old->flags & NFS_MOUNT_UNSHARED) | |
1854 | return 0; | |
1855 | if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0) | |
1856 | return 0; | |
1857 | return nfs_compare_mount_options(sb, server, mntflags); | |
275a5d24 TM |
1858 | } |
1859 | ||
fa799759 MS |
1860 | static int nfs_bdi_register(struct nfs_server *server) |
1861 | { | |
1862 | return bdi_register_dev(&server->backing_dev_info, server->s_dev); | |
1863 | } | |
1864 | ||
816724e6 TM |
1865 | static int nfs_get_sb(struct file_system_type *fs_type, |
1866 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
f7b422b1 | 1867 | { |
f7b422b1 DH |
1868 | struct nfs_server *server = NULL; |
1869 | struct super_block *s; | |
33852a1f TM |
1870 | struct nfs_parsed_mount_data *data; |
1871 | struct nfs_fh *mntfh; | |
54ceac45 | 1872 | struct dentry *mntroot; |
75180df2 | 1873 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1874 | struct nfs_sb_mountdata sb_mntdata = { |
1875 | .mntflags = flags, | |
1876 | }; | |
33852a1f TM |
1877 | int error = -ENOMEM; |
1878 | ||
1879 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
1880 | mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL); | |
1881 | if (data == NULL || mntfh == NULL) | |
1882 | goto out_free_fh; | |
f7b422b1 | 1883 | |
33852a1f | 1884 | security_init_mnt_opts(&data->lsm_opts); |
f9c3a380 | 1885 | |
54ceac45 | 1886 | /* Validate the mount data */ |
33852a1f | 1887 | error = nfs_validate_mount_data(raw_data, data, mntfh, dev_name); |
54ceac45 | 1888 | if (error < 0) |
0655960f | 1889 | goto out; |
f7b422b1 | 1890 | |
54ceac45 | 1891 | /* Get a volume representation */ |
33852a1f | 1892 | server = nfs_create_server(data, mntfh); |
54ceac45 DH |
1893 | if (IS_ERR(server)) { |
1894 | error = PTR_ERR(server); | |
0655960f | 1895 | goto out; |
f7b422b1 | 1896 | } |
e89a5a43 | 1897 | sb_mntdata.server = server; |
f7b422b1 | 1898 | |
75180df2 TM |
1899 | if (server->flags & NFS_MOUNT_UNSHARED) |
1900 | compare_super = NULL; | |
1901 | ||
54ceac45 | 1902 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1903 | s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
1904 | if (IS_ERR(s)) { |
1905 | error = PTR_ERR(s); | |
54ceac45 | 1906 | goto out_err_nosb; |
816724e6 TM |
1907 | } |
1908 | ||
54ceac45 DH |
1909 | if (s->s_fs_info != server) { |
1910 | nfs_free_server(server); | |
1911 | server = NULL; | |
fa799759 MS |
1912 | } else { |
1913 | error = nfs_bdi_register(server); | |
1914 | if (error) | |
1915 | goto error_splat_super; | |
54ceac45 | 1916 | } |
f7b422b1 | 1917 | |
54ceac45 DH |
1918 | if (!s->s_root) { |
1919 | /* initial superblock/root creation */ | |
33852a1f | 1920 | nfs_fill_super(s, data); |
54ceac45 | 1921 | } |
f7b422b1 | 1922 | |
33852a1f | 1923 | mntroot = nfs_get_root(s, mntfh); |
54ceac45 DH |
1924 | if (IS_ERR(mntroot)) { |
1925 | error = PTR_ERR(mntroot); | |
1926 | goto error_splat_super; | |
f7b422b1 | 1927 | } |
816724e6 | 1928 | |
33852a1f | 1929 | error = security_sb_set_mnt_opts(s, &data->lsm_opts); |
f9c3a380 EP |
1930 | if (error) |
1931 | goto error_splat_root; | |
1932 | ||
54ceac45 DH |
1933 | s->s_flags |= MS_ACTIVE; |
1934 | mnt->mnt_sb = s; | |
1935 | mnt->mnt_root = mntroot; | |
0655960f CL |
1936 | error = 0; |
1937 | ||
1938 | out: | |
33852a1f TM |
1939 | kfree(data->nfs_server.hostname); |
1940 | kfree(data->mount_server.hostname); | |
1941 | security_free_mnt_opts(&data->lsm_opts); | |
1942 | out_free_fh: | |
1943 | kfree(mntfh); | |
1944 | kfree(data); | |
0655960f | 1945 | return error; |
816724e6 | 1946 | |
54ceac45 DH |
1947 | out_err_nosb: |
1948 | nfs_free_server(server); | |
0655960f | 1949 | goto out; |
54ceac45 | 1950 | |
f9c3a380 EP |
1951 | error_splat_root: |
1952 | dput(mntroot); | |
54ceac45 DH |
1953 | error_splat_super: |
1954 | up_write(&s->s_umount); | |
1955 | deactivate_super(s); | |
0655960f | 1956 | goto out; |
f7b422b1 DH |
1957 | } |
1958 | ||
54ceac45 DH |
1959 | /* |
1960 | * Destroy an NFS2/3 superblock | |
1961 | */ | |
f7b422b1 DH |
1962 | static void nfs_kill_super(struct super_block *s) |
1963 | { | |
1964 | struct nfs_server *server = NFS_SB(s); | |
1965 | ||
fa799759 | 1966 | bdi_unregister(&server->backing_dev_info); |
f7b422b1 | 1967 | kill_anon_super(s); |
54ceac45 | 1968 | nfs_free_server(server); |
f7b422b1 DH |
1969 | } |
1970 | ||
54ceac45 DH |
1971 | /* |
1972 | * Clone an NFS2/3 server record on xdev traversal (FSID-change) | |
1973 | */ | |
1974 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags, | |
1975 | const char *dev_name, void *raw_data, | |
1976 | struct vfsmount *mnt) | |
f7b422b1 DH |
1977 | { |
1978 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
1979 | struct super_block *s; |
1980 | struct nfs_server *server; | |
1981 | struct dentry *mntroot; | |
75180df2 | 1982 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1983 | struct nfs_sb_mountdata sb_mntdata = { |
1984 | .mntflags = flags, | |
1985 | }; | |
54ceac45 | 1986 | int error; |
f7b422b1 | 1987 | |
54ceac45 | 1988 | dprintk("--> nfs_xdev_get_sb()\n"); |
f7b422b1 | 1989 | |
54ceac45 DH |
1990 | /* create a new volume representation */ |
1991 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
1992 | if (IS_ERR(server)) { | |
1993 | error = PTR_ERR(server); | |
1994 | goto out_err_noserver; | |
1995 | } | |
e89a5a43 | 1996 | sb_mntdata.server = server; |
8fa5c000 | 1997 | |
75180df2 TM |
1998 | if (server->flags & NFS_MOUNT_UNSHARED) |
1999 | compare_super = NULL; | |
2000 | ||
54ceac45 | 2001 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 2002 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2003 | if (IS_ERR(s)) { |
2004 | error = PTR_ERR(s); | |
2005 | goto out_err_nosb; | |
2006 | } | |
5006a76c | 2007 | |
54ceac45 DH |
2008 | if (s->s_fs_info != server) { |
2009 | nfs_free_server(server); | |
2010 | server = NULL; | |
fa799759 MS |
2011 | } else { |
2012 | error = nfs_bdi_register(server); | |
2013 | if (error) | |
2014 | goto error_splat_super; | |
f7b422b1 | 2015 | } |
24c8dbbb | 2016 | |
54ceac45 DH |
2017 | if (!s->s_root) { |
2018 | /* initial superblock/root creation */ | |
54ceac45 DH |
2019 | nfs_clone_super(s, data->sb); |
2020 | } | |
f7b422b1 | 2021 | |
54ceac45 DH |
2022 | mntroot = nfs_get_root(s, data->fh); |
2023 | if (IS_ERR(mntroot)) { | |
2024 | error = PTR_ERR(mntroot); | |
2025 | goto error_splat_super; | |
f7b422b1 | 2026 | } |
e9cc6c23 | 2027 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
4c1fe2f7 NB |
2028 | dput(mntroot); |
2029 | error = -ESTALE; | |
2030 | goto error_splat_super; | |
2031 | } | |
f7b422b1 | 2032 | |
54ceac45 DH |
2033 | s->s_flags |= MS_ACTIVE; |
2034 | mnt->mnt_sb = s; | |
2035 | mnt->mnt_root = mntroot; | |
f7b422b1 | 2036 | |
f9c3a380 EP |
2037 | /* clone any lsm security options from the parent to the new sb */ |
2038 | security_sb_clone_mnt_opts(data->sb, s); | |
2039 | ||
54ceac45 DH |
2040 | dprintk("<-- nfs_xdev_get_sb() = 0\n"); |
2041 | return 0; | |
24c8dbbb | 2042 | |
54ceac45 DH |
2043 | out_err_nosb: |
2044 | nfs_free_server(server); | |
2045 | out_err_noserver: | |
2046 | dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error); | |
2047 | return error; | |
f7b422b1 | 2048 | |
54ceac45 DH |
2049 | error_splat_super: |
2050 | up_write(&s->s_umount); | |
2051 | deactivate_super(s); | |
2052 | dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error); | |
2053 | return error; | |
f7b422b1 DH |
2054 | } |
2055 | ||
54ceac45 DH |
2056 | #ifdef CONFIG_NFS_V4 |
2057 | ||
f7b422b1 | 2058 | /* |
54ceac45 | 2059 | * Finish setting up a cloned NFS4 superblock |
f7b422b1 | 2060 | */ |
54ceac45 DH |
2061 | static void nfs4_clone_super(struct super_block *sb, |
2062 | const struct super_block *old_sb) | |
f7b422b1 | 2063 | { |
54ceac45 DH |
2064 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; |
2065 | sb->s_blocksize = old_sb->s_blocksize; | |
2066 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 2067 | sb->s_time_gran = 1; |
54ceac45 DH |
2068 | sb->s_op = old_sb->s_op; |
2069 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
2070 | } |
2071 | ||
54ceac45 DH |
2072 | /* |
2073 | * Set up an NFS4 superblock | |
2074 | */ | |
2075 | static void nfs4_fill_super(struct super_block *sb) | |
f7b422b1 | 2076 | { |
54ceac45 DH |
2077 | sb->s_time_gran = 1; |
2078 | sb->s_op = &nfs4_sops; | |
2079 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
2080 | } |
2081 | ||
f0768ebd CL |
2082 | /* |
2083 | * Validate NFSv4 mount options | |
2084 | */ | |
91ea40b9 TT |
2085 | static int nfs4_validate_mount_data(void *options, |
2086 | struct nfs_parsed_mount_data *args, | |
2087 | const char *dev_name) | |
f0768ebd | 2088 | { |
4c568017 | 2089 | struct sockaddr_in *ap; |
91ea40b9 | 2090 | struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; |
f0768ebd CL |
2091 | char *c; |
2092 | ||
2093 | if (data == NULL) | |
2094 | goto out_no_data; | |
2095 | ||
91ea40b9 TT |
2096 | args->rsize = NFS_MAX_FILE_IO_SIZE; |
2097 | args->wsize = NFS_MAX_FILE_IO_SIZE; | |
2098 | args->timeo = 600; | |
2099 | args->retrans = 2; | |
2100 | args->acregmin = 3; | |
2101 | args->acregmax = 60; | |
2102 | args->acdirmin = 30; | |
2103 | args->acdirmax = 60; | |
f22d6d79 | 2104 | args->nfs_server.port = NFS_PORT; /* 2049 unless user set port= */ |
0896a725 | 2105 | args->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
91ea40b9 | 2106 | |
f0768ebd CL |
2107 | switch (data->version) { |
2108 | case 1: | |
4c568017 CL |
2109 | ap = (struct sockaddr_in *)&args->nfs_server.address; |
2110 | if (data->host_addrlen > sizeof(args->nfs_server.address)) | |
2111 | goto out_no_address; | |
2112 | if (data->host_addrlen == 0) | |
f0768ebd | 2113 | goto out_no_address; |
4c568017 CL |
2114 | args->nfs_server.addrlen = data->host_addrlen; |
2115 | if (copy_from_user(ap, data->host_addr, data->host_addrlen)) | |
f0768ebd | 2116 | return -EFAULT; |
91ea40b9 TT |
2117 | if (!nfs_verify_server_address((struct sockaddr *) |
2118 | &args->nfs_server.address)) | |
f0768ebd CL |
2119 | goto out_no_address; |
2120 | ||
2121 | switch (data->auth_flavourlen) { | |
2122 | case 0: | |
91ea40b9 | 2123 | args->auth_flavors[0] = RPC_AUTH_UNIX; |
f0768ebd CL |
2124 | break; |
2125 | case 1: | |
20c71f5e | 2126 | if (copy_from_user(&args->auth_flavors[0], |
91ea40b9 | 2127 | data->auth_flavours, |
20c71f5e | 2128 | sizeof(args->auth_flavors[0]))) |
f0768ebd CL |
2129 | return -EFAULT; |
2130 | break; | |
2131 | default: | |
2132 | goto out_inval_auth; | |
2133 | } | |
2134 | ||
2135 | c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); | |
2136 | if (IS_ERR(c)) | |
2137 | return PTR_ERR(c); | |
91ea40b9 | 2138 | args->nfs_server.hostname = c; |
f0768ebd CL |
2139 | |
2140 | c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); | |
2141 | if (IS_ERR(c)) | |
2142 | return PTR_ERR(c); | |
91ea40b9 TT |
2143 | args->nfs_server.export_path = c; |
2144 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); | |
f0768ebd CL |
2145 | |
2146 | c = strndup_user(data->client_addr.data, 16); | |
2147 | if (IS_ERR(c)) | |
2148 | return PTR_ERR(c); | |
91ea40b9 TT |
2149 | args->client_address = c; |
2150 | ||
2151 | /* | |
2152 | * Translate to nfs_parsed_mount_data, which nfs4_fill_super | |
2153 | * can deal with. | |
2154 | */ | |
2155 | ||
2156 | args->flags = data->flags & NFS4_MOUNT_FLAGMASK; | |
2157 | args->rsize = data->rsize; | |
2158 | args->wsize = data->wsize; | |
2159 | args->timeo = data->timeo; | |
2160 | args->retrans = data->retrans; | |
2161 | args->acregmin = data->acregmin; | |
2162 | args->acregmax = data->acregmax; | |
2163 | args->acdirmin = data->acdirmin; | |
2164 | args->acdirmax = data->acdirmax; | |
2165 | args->nfs_server.protocol = data->proto; | |
f0768ebd CL |
2166 | |
2167 | break; | |
80071225 | 2168 | default: { |
dc045898 | 2169 | int status; |
91ea40b9 TT |
2170 | |
2171 | if (nfs_parse_mount_options((char *)options, args) == 0) | |
80071225 CL |
2172 | return -EINVAL; |
2173 | ||
2174 | if (!nfs_verify_server_address((struct sockaddr *) | |
91ea40b9 | 2175 | &args->nfs_server.address)) |
80071225 | 2176 | return -EINVAL; |
80071225 | 2177 | |
91ea40b9 | 2178 | switch (args->auth_flavor_len) { |
80071225 | 2179 | case 0: |
91ea40b9 | 2180 | args->auth_flavors[0] = RPC_AUTH_UNIX; |
80071225 CL |
2181 | break; |
2182 | case 1: | |
80071225 CL |
2183 | break; |
2184 | default: | |
2185 | goto out_inval_auth; | |
2186 | } | |
2187 | ||
91ea40b9 | 2188 | if (args->client_address == NULL) |
0a87cf12 JL |
2189 | goto out_no_client_address; |
2190 | ||
dc045898 CL |
2191 | status = nfs_parse_devname(dev_name, |
2192 | &args->nfs_server.hostname, | |
2193 | NFS4_MAXNAMLEN, | |
2194 | &args->nfs_server.export_path, | |
2195 | NFS4_MAXPATHLEN); | |
2196 | if (status < 0) | |
2197 | return status; | |
2198 | ||
80071225 CL |
2199 | break; |
2200 | } | |
f0768ebd CL |
2201 | } |
2202 | ||
2203 | return 0; | |
2204 | ||
2205 | out_no_data: | |
2206 | dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); | |
2207 | return -EINVAL; | |
2208 | ||
2209 | out_inval_auth: | |
2210 | dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", | |
2211 | data->auth_flavourlen); | |
2212 | return -EINVAL; | |
2213 | ||
2214 | out_no_address: | |
2215 | dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); | |
2216 | return -EINVAL; | |
0a87cf12 JL |
2217 | |
2218 | out_no_client_address: | |
2219 | dfprintk(MOUNT, "NFS4: mount program didn't pass callback address\n"); | |
2220 | return -EINVAL; | |
f0768ebd CL |
2221 | } |
2222 | ||
54ceac45 DH |
2223 | /* |
2224 | * Get the superblock for an NFS4 mountpoint | |
2225 | */ | |
816724e6 TM |
2226 | static int nfs4_get_sb(struct file_system_type *fs_type, |
2227 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
f7b422b1 | 2228 | { |
33852a1f | 2229 | struct nfs_parsed_mount_data *data; |
54ceac45 DH |
2230 | struct super_block *s; |
2231 | struct nfs_server *server; | |
33852a1f | 2232 | struct nfs_fh *mntfh; |
54ceac45 | 2233 | struct dentry *mntroot; |
75180df2 | 2234 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2235 | struct nfs_sb_mountdata sb_mntdata = { |
2236 | .mntflags = flags, | |
2237 | }; | |
33852a1f TM |
2238 | int error = -ENOMEM; |
2239 | ||
2240 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2241 | mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL); | |
2242 | if (data == NULL || mntfh == NULL) | |
2243 | goto out_free_fh; | |
f7b422b1 | 2244 | |
33852a1f | 2245 | security_init_mnt_opts(&data->lsm_opts); |
f9c3a380 | 2246 | |
f0768ebd | 2247 | /* Validate the mount data */ |
33852a1f | 2248 | error = nfs4_validate_mount_data(raw_data, data, dev_name); |
f0768ebd CL |
2249 | if (error < 0) |
2250 | goto out; | |
f7b422b1 | 2251 | |
54ceac45 | 2252 | /* Get a volume representation */ |
33852a1f | 2253 | server = nfs4_create_server(data, mntfh); |
54ceac45 DH |
2254 | if (IS_ERR(server)) { |
2255 | error = PTR_ERR(server); | |
29eb981a | 2256 | goto out; |
f7b422b1 | 2257 | } |
e89a5a43 | 2258 | sb_mntdata.server = server; |
f7b422b1 | 2259 | |
75180df2 TM |
2260 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2261 | compare_super = NULL; | |
2262 | ||
54ceac45 | 2263 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 2264 | s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
2265 | if (IS_ERR(s)) { |
2266 | error = PTR_ERR(s); | |
f7b422b1 | 2267 | goto out_free; |
816724e6 TM |
2268 | } |
2269 | ||
5dd3177a TM |
2270 | if (s->s_fs_info != server) { |
2271 | nfs_free_server(server); | |
2272 | server = NULL; | |
fa799759 MS |
2273 | } else { |
2274 | error = nfs_bdi_register(server); | |
2275 | if (error) | |
2276 | goto error_splat_super; | |
5dd3177a TM |
2277 | } |
2278 | ||
54ceac45 DH |
2279 | if (!s->s_root) { |
2280 | /* initial superblock/root creation */ | |
54ceac45 | 2281 | nfs4_fill_super(s); |
54ceac45 | 2282 | } |
f7b422b1 | 2283 | |
33852a1f | 2284 | mntroot = nfs4_get_root(s, mntfh); |
54ceac45 DH |
2285 | if (IS_ERR(mntroot)) { |
2286 | error = PTR_ERR(mntroot); | |
2287 | goto error_splat_super; | |
f7b422b1 | 2288 | } |
54ceac45 | 2289 | |
33852a1f | 2290 | error = security_sb_set_mnt_opts(s, &data->lsm_opts); |
46c8ac74 EP |
2291 | if (error) |
2292 | goto error_splat_root; | |
2293 | ||
f7b422b1 | 2294 | s->s_flags |= MS_ACTIVE; |
54ceac45 DH |
2295 | mnt->mnt_sb = s; |
2296 | mnt->mnt_root = mntroot; | |
29eb981a CL |
2297 | error = 0; |
2298 | ||
2299 | out: | |
33852a1f TM |
2300 | kfree(data->client_address); |
2301 | kfree(data->nfs_server.export_path); | |
2302 | kfree(data->nfs_server.hostname); | |
2303 | security_free_mnt_opts(&data->lsm_opts); | |
2304 | out_free_fh: | |
2305 | kfree(mntfh); | |
2306 | kfree(data); | |
29eb981a | 2307 | return error; |
54ceac45 | 2308 | |
f7b422b1 | 2309 | out_free: |
54ceac45 | 2310 | nfs_free_server(server); |
29eb981a | 2311 | goto out; |
54ceac45 | 2312 | |
46c8ac74 EP |
2313 | error_splat_root: |
2314 | dput(mntroot); | |
54ceac45 DH |
2315 | error_splat_super: |
2316 | up_write(&s->s_umount); | |
2317 | deactivate_super(s); | |
29eb981a | 2318 | goto out; |
f7b422b1 DH |
2319 | } |
2320 | ||
2321 | static void nfs4_kill_super(struct super_block *sb) | |
2322 | { | |
2323 | struct nfs_server *server = NFS_SB(sb); | |
2324 | ||
2325 | nfs_return_all_delegations(sb); | |
2326 | kill_anon_super(sb); | |
2327 | ||
2328 | nfs4_renewd_prepare_shutdown(server); | |
54ceac45 | 2329 | nfs_free_server(server); |
f7b422b1 DH |
2330 | } |
2331 | ||
2332 | /* | |
54ceac45 | 2333 | * Clone an NFS4 server record on xdev traversal (FSID-change) |
f7b422b1 | 2334 | */ |
54ceac45 DH |
2335 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags, |
2336 | const char *dev_name, void *raw_data, | |
2337 | struct vfsmount *mnt) | |
f7b422b1 | 2338 | { |
54ceac45 DH |
2339 | struct nfs_clone_mount *data = raw_data; |
2340 | struct super_block *s; | |
2341 | struct nfs_server *server; | |
2342 | struct dentry *mntroot; | |
75180df2 | 2343 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2344 | struct nfs_sb_mountdata sb_mntdata = { |
2345 | .mntflags = flags, | |
2346 | }; | |
54ceac45 | 2347 | int error; |
f7b422b1 | 2348 | |
54ceac45 | 2349 | dprintk("--> nfs4_xdev_get_sb()\n"); |
f7b422b1 | 2350 | |
54ceac45 DH |
2351 | /* create a new volume representation */ |
2352 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
2353 | if (IS_ERR(server)) { | |
2354 | error = PTR_ERR(server); | |
2355 | goto out_err_noserver; | |
f7b422b1 | 2356 | } |
e89a5a43 | 2357 | sb_mntdata.server = server; |
f7b422b1 | 2358 | |
75180df2 TM |
2359 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2360 | compare_super = NULL; | |
2361 | ||
54ceac45 | 2362 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 2363 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2364 | if (IS_ERR(s)) { |
2365 | error = PTR_ERR(s); | |
2366 | goto out_err_nosb; | |
f7b422b1 | 2367 | } |
f7b422b1 | 2368 | |
54ceac45 DH |
2369 | if (s->s_fs_info != server) { |
2370 | nfs_free_server(server); | |
2371 | server = NULL; | |
fa799759 MS |
2372 | } else { |
2373 | error = nfs_bdi_register(server); | |
2374 | if (error) | |
2375 | goto error_splat_super; | |
54ceac45 | 2376 | } |
f7b422b1 | 2377 | |
54ceac45 DH |
2378 | if (!s->s_root) { |
2379 | /* initial superblock/root creation */ | |
54ceac45 DH |
2380 | nfs4_clone_super(s, data->sb); |
2381 | } | |
f7b422b1 | 2382 | |
54ceac45 DH |
2383 | mntroot = nfs4_get_root(s, data->fh); |
2384 | if (IS_ERR(mntroot)) { | |
2385 | error = PTR_ERR(mntroot); | |
2386 | goto error_splat_super; | |
2387 | } | |
e9cc6c23 TM |
2388 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
2389 | dput(mntroot); | |
2390 | error = -ESTALE; | |
2391 | goto error_splat_super; | |
2392 | } | |
f7b422b1 | 2393 | |
54ceac45 DH |
2394 | s->s_flags |= MS_ACTIVE; |
2395 | mnt->mnt_sb = s; | |
2396 | mnt->mnt_root = mntroot; | |
2397 | ||
46c8ac74 EP |
2398 | security_sb_clone_mnt_opts(data->sb, s); |
2399 | ||
54ceac45 DH |
2400 | dprintk("<-- nfs4_xdev_get_sb() = 0\n"); |
2401 | return 0; | |
2402 | ||
2403 | out_err_nosb: | |
2404 | nfs_free_server(server); | |
2405 | out_err_noserver: | |
2406 | dprintk("<-- nfs4_xdev_get_sb() = %d [error]\n", error); | |
2407 | return error; | |
2408 | ||
2409 | error_splat_super: | |
2410 | up_write(&s->s_umount); | |
2411 | deactivate_super(s); | |
2412 | dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error); | |
2413 | return error; | |
f7b422b1 DH |
2414 | } |
2415 | ||
54ceac45 DH |
2416 | /* |
2417 | * Create an NFS4 server record on referral traversal | |
2418 | */ | |
2419 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, int flags, | |
2420 | const char *dev_name, void *raw_data, | |
2421 | struct vfsmount *mnt) | |
f7b422b1 DH |
2422 | { |
2423 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
2424 | struct super_block *s; |
2425 | struct nfs_server *server; | |
2426 | struct dentry *mntroot; | |
2427 | struct nfs_fh mntfh; | |
75180df2 | 2428 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2429 | struct nfs_sb_mountdata sb_mntdata = { |
2430 | .mntflags = flags, | |
2431 | }; | |
54ceac45 DH |
2432 | int error; |
2433 | ||
2434 | dprintk("--> nfs4_referral_get_sb()\n"); | |
2435 | ||
2436 | /* create a new volume representation */ | |
2437 | server = nfs4_create_referral_server(data, &mntfh); | |
2438 | if (IS_ERR(server)) { | |
2439 | error = PTR_ERR(server); | |
2440 | goto out_err_noserver; | |
2441 | } | |
e89a5a43 | 2442 | sb_mntdata.server = server; |
54ceac45 | 2443 | |
75180df2 TM |
2444 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2445 | compare_super = NULL; | |
2446 | ||
54ceac45 | 2447 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 2448 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2449 | if (IS_ERR(s)) { |
2450 | error = PTR_ERR(s); | |
2451 | goto out_err_nosb; | |
2452 | } | |
2453 | ||
2454 | if (s->s_fs_info != server) { | |
2455 | nfs_free_server(server); | |
2456 | server = NULL; | |
fa799759 MS |
2457 | } else { |
2458 | error = nfs_bdi_register(server); | |
2459 | if (error) | |
2460 | goto error_splat_super; | |
54ceac45 DH |
2461 | } |
2462 | ||
2463 | if (!s->s_root) { | |
2464 | /* initial superblock/root creation */ | |
54ceac45 DH |
2465 | nfs4_fill_super(s); |
2466 | } | |
2467 | ||
f2d0d85e | 2468 | mntroot = nfs4_get_root(s, &mntfh); |
54ceac45 DH |
2469 | if (IS_ERR(mntroot)) { |
2470 | error = PTR_ERR(mntroot); | |
2471 | goto error_splat_super; | |
2472 | } | |
e9cc6c23 TM |
2473 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
2474 | dput(mntroot); | |
2475 | error = -ESTALE; | |
2476 | goto error_splat_super; | |
2477 | } | |
54ceac45 DH |
2478 | |
2479 | s->s_flags |= MS_ACTIVE; | |
2480 | mnt->mnt_sb = s; | |
2481 | mnt->mnt_root = mntroot; | |
2482 | ||
46c8ac74 EP |
2483 | security_sb_clone_mnt_opts(data->sb, s); |
2484 | ||
54ceac45 DH |
2485 | dprintk("<-- nfs4_referral_get_sb() = 0\n"); |
2486 | return 0; | |
2487 | ||
2488 | out_err_nosb: | |
2489 | nfs_free_server(server); | |
2490 | out_err_noserver: | |
2491 | dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error); | |
2492 | return error; | |
2493 | ||
2494 | error_splat_super: | |
2495 | up_write(&s->s_umount); | |
2496 | deactivate_super(s); | |
2497 | dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error); | |
2498 | return error; | |
f7b422b1 DH |
2499 | } |
2500 | ||
54ceac45 | 2501 | #endif /* CONFIG_NFS_V4 */ |