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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> | |
36 | #include <linux/nfs_fs.h> | |
37 | #include <linux/nfs_mount.h> | |
38 | #include <linux/nfs4_mount.h> | |
39 | #include <linux/lockd/bind.h> | |
40 | #include <linux/smp_lock.h> | |
41 | #include <linux/seq_file.h> | |
42 | #include <linux/mount.h> | |
43 | #include <linux/nfs_idmap.h> | |
44 | #include <linux/vfs.h> | |
45 | #include <linux/inet.h> | |
46 | #include <linux/nfs_xdr.h> | |
b5d5dfbd | 47 | #include <linux/magic.h> |
bf0fd768 | 48 | #include <linux/parser.h> |
f7b422b1 DH |
49 | |
50 | #include <asm/system.h> | |
51 | #include <asm/uaccess.h> | |
52 | ||
53 | #include "nfs4_fs.h" | |
54 | #include "callback.h" | |
55 | #include "delegation.h" | |
56 | #include "iostat.h" | |
57 | #include "internal.h" | |
58 | ||
59 | #define NFSDBG_FACILITY NFSDBG_VFS | |
60 | ||
bf0fd768 CL |
61 | enum { |
62 | /* Mount options that take no arguments */ | |
63 | Opt_soft, Opt_hard, | |
64 | Opt_intr, Opt_nointr, | |
65 | Opt_posix, Opt_noposix, | |
66 | Opt_cto, Opt_nocto, | |
67 | Opt_ac, Opt_noac, | |
68 | Opt_lock, Opt_nolock, | |
69 | Opt_v2, Opt_v3, | |
70 | Opt_udp, Opt_tcp, | |
71 | Opt_acl, Opt_noacl, | |
72 | Opt_rdirplus, Opt_nordirplus, | |
75180df2 | 73 | Opt_sharecache, Opt_nosharecache, |
bf0fd768 CL |
74 | |
75 | /* Mount options that take integer arguments */ | |
76 | Opt_port, | |
77 | Opt_rsize, Opt_wsize, Opt_bsize, | |
78 | Opt_timeo, Opt_retrans, | |
79 | Opt_acregmin, Opt_acregmax, | |
80 | Opt_acdirmin, Opt_acdirmax, | |
81 | Opt_actimeo, | |
82 | Opt_namelen, | |
83 | Opt_mountport, | |
84 | Opt_mountprog, Opt_mountvers, | |
85 | Opt_nfsprog, Opt_nfsvers, | |
86 | ||
87 | /* Mount options that take string arguments */ | |
88 | Opt_sec, Opt_proto, Opt_mountproto, | |
0ac83779 | 89 | Opt_addr, Opt_mountaddr, Opt_clientaddr, |
bf0fd768 CL |
90 | |
91 | /* Mount options that are ignored */ | |
92 | Opt_userspace, Opt_deprecated, | |
93 | ||
94 | Opt_err | |
95 | }; | |
96 | ||
97 | static match_table_t nfs_mount_option_tokens = { | |
98 | { Opt_userspace, "bg" }, | |
99 | { Opt_userspace, "fg" }, | |
100 | { Opt_soft, "soft" }, | |
101 | { Opt_hard, "hard" }, | |
102 | { Opt_intr, "intr" }, | |
103 | { Opt_nointr, "nointr" }, | |
104 | { Opt_posix, "posix" }, | |
105 | { Opt_noposix, "noposix" }, | |
106 | { Opt_cto, "cto" }, | |
107 | { Opt_nocto, "nocto" }, | |
108 | { Opt_ac, "ac" }, | |
109 | { Opt_noac, "noac" }, | |
110 | { Opt_lock, "lock" }, | |
111 | { Opt_nolock, "nolock" }, | |
112 | { Opt_v2, "v2" }, | |
113 | { Opt_v3, "v3" }, | |
114 | { Opt_udp, "udp" }, | |
115 | { Opt_tcp, "tcp" }, | |
116 | { Opt_acl, "acl" }, | |
117 | { Opt_noacl, "noacl" }, | |
118 | { Opt_rdirplus, "rdirplus" }, | |
119 | { Opt_nordirplus, "nordirplus" }, | |
75180df2 TM |
120 | { Opt_sharecache, "sharecache" }, |
121 | { Opt_nosharecache, "nosharecache" }, | |
bf0fd768 CL |
122 | |
123 | { Opt_port, "port=%u" }, | |
124 | { Opt_rsize, "rsize=%u" }, | |
125 | { Opt_wsize, "wsize=%u" }, | |
126 | { Opt_bsize, "bsize=%u" }, | |
127 | { Opt_timeo, "timeo=%u" }, | |
128 | { Opt_retrans, "retrans=%u" }, | |
129 | { Opt_acregmin, "acregmin=%u" }, | |
130 | { Opt_acregmax, "acregmax=%u" }, | |
131 | { Opt_acdirmin, "acdirmin=%u" }, | |
132 | { Opt_acdirmax, "acdirmax=%u" }, | |
133 | { Opt_actimeo, "actimeo=%u" }, | |
134 | { Opt_userspace, "retry=%u" }, | |
135 | { Opt_namelen, "namlen=%u" }, | |
136 | { Opt_mountport, "mountport=%u" }, | |
137 | { Opt_mountprog, "mountprog=%u" }, | |
138 | { Opt_mountvers, "mountvers=%u" }, | |
139 | { Opt_nfsprog, "nfsprog=%u" }, | |
140 | { Opt_nfsvers, "nfsvers=%u" }, | |
141 | { Opt_nfsvers, "vers=%u" }, | |
142 | ||
143 | { Opt_sec, "sec=%s" }, | |
144 | { Opt_proto, "proto=%s" }, | |
145 | { Opt_mountproto, "mountproto=%s" }, | |
146 | { Opt_addr, "addr=%s" }, | |
147 | { Opt_clientaddr, "clientaddr=%s" }, | |
0ac83779 CL |
148 | { Opt_userspace, "mounthost=%s" }, |
149 | { Opt_mountaddr, "mountaddr=%s" }, | |
bf0fd768 CL |
150 | |
151 | { Opt_err, NULL } | |
152 | }; | |
153 | ||
154 | enum { | |
155 | Opt_xprt_udp, Opt_xprt_tcp, | |
156 | ||
157 | Opt_xprt_err | |
158 | }; | |
159 | ||
160 | static match_table_t nfs_xprt_protocol_tokens = { | |
161 | { Opt_xprt_udp, "udp" }, | |
162 | { Opt_xprt_tcp, "tcp" }, | |
163 | ||
164 | { Opt_xprt_err, NULL } | |
165 | }; | |
166 | ||
167 | enum { | |
168 | Opt_sec_none, Opt_sec_sys, | |
169 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
170 | Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, | |
171 | Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, | |
172 | ||
173 | Opt_sec_err | |
174 | }; | |
175 | ||
176 | static match_table_t nfs_secflavor_tokens = { | |
177 | { Opt_sec_none, "none" }, | |
178 | { Opt_sec_none, "null" }, | |
179 | { Opt_sec_sys, "sys" }, | |
180 | ||
181 | { Opt_sec_krb5, "krb5" }, | |
182 | { Opt_sec_krb5i, "krb5i" }, | |
183 | { Opt_sec_krb5p, "krb5p" }, | |
184 | ||
185 | { Opt_sec_lkey, "lkey" }, | |
186 | { Opt_sec_lkeyi, "lkeyi" }, | |
187 | { Opt_sec_lkeyp, "lkeyp" }, | |
188 | ||
189 | { Opt_sec_err, NULL } | |
190 | }; | |
191 | ||
192 | ||
f7b422b1 | 193 | static void nfs_umount_begin(struct vfsmount *, int); |
816724e6 | 194 | static int nfs_statfs(struct dentry *, struct kstatfs *); |
f7b422b1 DH |
195 | static int nfs_show_options(struct seq_file *, struct vfsmount *); |
196 | static int nfs_show_stats(struct seq_file *, struct vfsmount *); | |
816724e6 | 197 | static int nfs_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *); |
54ceac45 | 198 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, |
816724e6 | 199 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); |
f7b422b1 DH |
200 | static void nfs_kill_super(struct super_block *); |
201 | ||
202 | static struct file_system_type nfs_fs_type = { | |
203 | .owner = THIS_MODULE, | |
204 | .name = "nfs", | |
205 | .get_sb = nfs_get_sb, | |
206 | .kill_sb = nfs_kill_super, | |
349457cc | 207 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
208 | }; |
209 | ||
54ceac45 | 210 | struct file_system_type nfs_xdev_fs_type = { |
f7b422b1 DH |
211 | .owner = THIS_MODULE, |
212 | .name = "nfs", | |
54ceac45 | 213 | .get_sb = nfs_xdev_get_sb, |
f7b422b1 | 214 | .kill_sb = nfs_kill_super, |
349457cc | 215 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
216 | }; |
217 | ||
ee9b6d61 | 218 | static const struct super_operations nfs_sops = { |
f7b422b1 DH |
219 | .alloc_inode = nfs_alloc_inode, |
220 | .destroy_inode = nfs_destroy_inode, | |
221 | .write_inode = nfs_write_inode, | |
222 | .statfs = nfs_statfs, | |
223 | .clear_inode = nfs_clear_inode, | |
224 | .umount_begin = nfs_umount_begin, | |
225 | .show_options = nfs_show_options, | |
226 | .show_stats = nfs_show_stats, | |
227 | }; | |
228 | ||
229 | #ifdef CONFIG_NFS_V4 | |
816724e6 TM |
230 | static int nfs4_get_sb(struct file_system_type *fs_type, |
231 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
54ceac45 DH |
232 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, |
233 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
234 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, | |
235 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
f7b422b1 DH |
236 | static void nfs4_kill_super(struct super_block *sb); |
237 | ||
238 | static struct file_system_type nfs4_fs_type = { | |
239 | .owner = THIS_MODULE, | |
240 | .name = "nfs4", | |
241 | .get_sb = nfs4_get_sb, | |
242 | .kill_sb = nfs4_kill_super, | |
349457cc | 243 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
244 | }; |
245 | ||
54ceac45 | 246 | struct file_system_type nfs4_xdev_fs_type = { |
f7b422b1 DH |
247 | .owner = THIS_MODULE, |
248 | .name = "nfs4", | |
54ceac45 | 249 | .get_sb = nfs4_xdev_get_sb, |
f7b422b1 | 250 | .kill_sb = nfs4_kill_super, |
349457cc | 251 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
252 | }; |
253 | ||
54ceac45 | 254 | struct file_system_type nfs4_referral_fs_type = { |
f7b422b1 DH |
255 | .owner = THIS_MODULE, |
256 | .name = "nfs4", | |
54ceac45 | 257 | .get_sb = nfs4_referral_get_sb, |
f7b422b1 | 258 | .kill_sb = nfs4_kill_super, |
349457cc | 259 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
260 | }; |
261 | ||
ee9b6d61 | 262 | static const struct super_operations nfs4_sops = { |
f7b422b1 DH |
263 | .alloc_inode = nfs_alloc_inode, |
264 | .destroy_inode = nfs_destroy_inode, | |
265 | .write_inode = nfs_write_inode, | |
266 | .statfs = nfs_statfs, | |
267 | .clear_inode = nfs4_clear_inode, | |
268 | .umount_begin = nfs_umount_begin, | |
269 | .show_options = nfs_show_options, | |
270 | .show_stats = nfs_show_stats, | |
271 | }; | |
272 | #endif | |
273 | ||
8e1f936b RR |
274 | static struct shrinker acl_shrinker = { |
275 | .shrink = nfs_access_cache_shrinker, | |
276 | .seeks = DEFAULT_SEEKS, | |
277 | }; | |
979df72e | 278 | |
f7b422b1 DH |
279 | /* |
280 | * Register the NFS filesystems | |
281 | */ | |
282 | int __init register_nfs_fs(void) | |
283 | { | |
284 | int ret; | |
285 | ||
286 | ret = register_filesystem(&nfs_fs_type); | |
287 | if (ret < 0) | |
288 | goto error_0; | |
289 | ||
f7b422b1 DH |
290 | ret = nfs_register_sysctl(); |
291 | if (ret < 0) | |
292 | goto error_1; | |
89a09141 | 293 | #ifdef CONFIG_NFS_V4 |
f7b422b1 DH |
294 | ret = register_filesystem(&nfs4_fs_type); |
295 | if (ret < 0) | |
296 | goto error_2; | |
297 | #endif | |
8e1f936b | 298 | register_shrinker(&acl_shrinker); |
f7b422b1 DH |
299 | return 0; |
300 | ||
301 | #ifdef CONFIG_NFS_V4 | |
302 | error_2: | |
303 | nfs_unregister_sysctl(); | |
89a09141 | 304 | #endif |
f7b422b1 DH |
305 | error_1: |
306 | unregister_filesystem(&nfs_fs_type); | |
f7b422b1 DH |
307 | error_0: |
308 | return ret; | |
309 | } | |
310 | ||
311 | /* | |
312 | * Unregister the NFS filesystems | |
313 | */ | |
314 | void __exit unregister_nfs_fs(void) | |
315 | { | |
8e1f936b | 316 | unregister_shrinker(&acl_shrinker); |
f7b422b1 DH |
317 | #ifdef CONFIG_NFS_V4 |
318 | unregister_filesystem(&nfs4_fs_type); | |
f7b422b1 | 319 | #endif |
49af7ee1 | 320 | nfs_unregister_sysctl(); |
f7b422b1 DH |
321 | unregister_filesystem(&nfs_fs_type); |
322 | } | |
323 | ||
324 | /* | |
325 | * Deliver file system statistics to userspace | |
326 | */ | |
816724e6 | 327 | static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
f7b422b1 | 328 | { |
0c7d90cf | 329 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
f7b422b1 DH |
330 | unsigned char blockbits; |
331 | unsigned long blockres; | |
0c7d90cf | 332 | struct nfs_fh *fh = NFS_FH(dentry->d_inode); |
f7b422b1 DH |
333 | struct nfs_fattr fattr; |
334 | struct nfs_fsstat res = { | |
335 | .fattr = &fattr, | |
336 | }; | |
337 | int error; | |
338 | ||
339 | lock_kernel(); | |
340 | ||
8fa5c000 | 341 | error = server->nfs_client->rpc_ops->statfs(server, fh, &res); |
f7b422b1 DH |
342 | if (error < 0) |
343 | goto out_err; | |
1a0ba9ae | 344 | buf->f_type = NFS_SUPER_MAGIC; |
f7b422b1 DH |
345 | |
346 | /* | |
347 | * Current versions of glibc do not correctly handle the | |
348 | * case where f_frsize != f_bsize. Eventually we want to | |
349 | * report the value of wtmult in this field. | |
350 | */ | |
0c7d90cf | 351 | buf->f_frsize = dentry->d_sb->s_blocksize; |
f7b422b1 DH |
352 | |
353 | /* | |
354 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
355 | * are reported in units of f_frsize. Linux hasn't had | |
356 | * an f_frsize field in its statfs struct until recently, | |
357 | * thus historically Linux's sys_statfs reports these | |
358 | * fields in units of f_bsize. | |
359 | */ | |
0c7d90cf DH |
360 | buf->f_bsize = dentry->d_sb->s_blocksize; |
361 | blockbits = dentry->d_sb->s_blocksize_bits; | |
f7b422b1 DH |
362 | blockres = (1 << blockbits) - 1; |
363 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
364 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
365 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
366 | ||
367 | buf->f_files = res.tfiles; | |
368 | buf->f_ffree = res.afiles; | |
369 | ||
370 | buf->f_namelen = server->namelen; | |
1a0ba9ae | 371 | |
f7b422b1 DH |
372 | unlock_kernel(); |
373 | return 0; | |
374 | ||
375 | out_err: | |
376 | dprintk("%s: statfs error = %d\n", __FUNCTION__, -error); | |
1a0ba9ae AA |
377 | unlock_kernel(); |
378 | return error; | |
f7b422b1 DH |
379 | } |
380 | ||
7d4e2747 DH |
381 | /* |
382 | * Map the security flavour number to a name | |
383 | */ | |
81039f1f TM |
384 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
385 | { | |
7d4e2747 | 386 | static const struct { |
81039f1f TM |
387 | rpc_authflavor_t flavour; |
388 | const char *str; | |
389 | } sec_flavours[] = { | |
390 | { RPC_AUTH_NULL, "null" }, | |
391 | { RPC_AUTH_UNIX, "sys" }, | |
392 | { RPC_AUTH_GSS_KRB5, "krb5" }, | |
393 | { RPC_AUTH_GSS_KRB5I, "krb5i" }, | |
394 | { RPC_AUTH_GSS_KRB5P, "krb5p" }, | |
395 | { RPC_AUTH_GSS_LKEY, "lkey" }, | |
396 | { RPC_AUTH_GSS_LKEYI, "lkeyi" }, | |
397 | { RPC_AUTH_GSS_LKEYP, "lkeyp" }, | |
398 | { RPC_AUTH_GSS_SPKM, "spkm" }, | |
399 | { RPC_AUTH_GSS_SPKMI, "spkmi" }, | |
400 | { RPC_AUTH_GSS_SPKMP, "spkmp" }, | |
4d81cd16 | 401 | { UINT_MAX, "unknown" } |
81039f1f TM |
402 | }; |
403 | int i; | |
404 | ||
4d81cd16 | 405 | for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) { |
81039f1f TM |
406 | if (sec_flavours[i].flavour == flavour) |
407 | break; | |
408 | } | |
409 | return sec_flavours[i].str; | |
410 | } | |
411 | ||
f7b422b1 DH |
412 | /* |
413 | * Describe the mount options in force on this server representation | |
414 | */ | |
415 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults) | |
416 | { | |
509de811 | 417 | static const struct proc_nfs_info { |
f7b422b1 | 418 | int flag; |
509de811 DH |
419 | const char *str; |
420 | const char *nostr; | |
f7b422b1 DH |
421 | } nfs_info[] = { |
422 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, | |
423 | { NFS_MOUNT_INTR, ",intr", "" }, | |
424 | { NFS_MOUNT_NOCTO, ",nocto", "" }, | |
425 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
426 | { NFS_MOUNT_NONLM, ",nolock", "" }, | |
427 | { NFS_MOUNT_NOACL, ",noacl", "" }, | |
74dd34e6 | 428 | { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" }, |
75180df2 | 429 | { NFS_MOUNT_UNSHARED, ",nosharecache", ""}, |
f7b422b1 DH |
430 | { 0, NULL, NULL } |
431 | }; | |
509de811 | 432 | const struct proc_nfs_info *nfs_infop; |
8fa5c000 | 433 | struct nfs_client *clp = nfss->nfs_client; |
f7b422b1 | 434 | char buf[12]; |
509de811 | 435 | const char *proto; |
f7b422b1 | 436 | |
8fa5c000 | 437 | seq_printf(m, ",vers=%d", clp->rpc_ops->version); |
f7b422b1 DH |
438 | seq_printf(m, ",rsize=%d", nfss->rsize); |
439 | seq_printf(m, ",wsize=%d", nfss->wsize); | |
440 | if (nfss->acregmin != 3*HZ || showdefaults) | |
441 | seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ); | |
442 | if (nfss->acregmax != 60*HZ || showdefaults) | |
443 | seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ); | |
444 | if (nfss->acdirmin != 30*HZ || showdefaults) | |
445 | seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ); | |
446 | if (nfss->acdirmax != 60*HZ || showdefaults) | |
447 | seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ); | |
448 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { | |
449 | if (nfss->flags & nfs_infop->flag) | |
450 | seq_puts(m, nfs_infop->str); | |
451 | else | |
452 | seq_puts(m, nfs_infop->nostr); | |
453 | } | |
454 | switch (nfss->client->cl_xprt->prot) { | |
455 | case IPPROTO_TCP: | |
456 | proto = "tcp"; | |
457 | break; | |
458 | case IPPROTO_UDP: | |
459 | proto = "udp"; | |
460 | break; | |
461 | default: | |
462 | snprintf(buf, sizeof(buf), "%u", nfss->client->cl_xprt->prot); | |
463 | proto = buf; | |
464 | } | |
465 | seq_printf(m, ",proto=%s", proto); | |
5006a76c DH |
466 | seq_printf(m, ",timeo=%lu", 10U * clp->retrans_timeo / HZ); |
467 | seq_printf(m, ",retrans=%u", clp->retrans_count); | |
81039f1f | 468 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
f7b422b1 DH |
469 | } |
470 | ||
471 | /* | |
472 | * Describe the mount options on this VFS mountpoint | |
473 | */ | |
474 | static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) | |
475 | { | |
476 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
477 | ||
478 | nfs_show_mount_options(m, nfss, 0); | |
479 | ||
ddc01c08 JL |
480 | seq_printf(m, ",addr="NIPQUAD_FMT, |
481 | NIPQUAD(nfss->nfs_client->cl_addr.sin_addr)); | |
f7b422b1 DH |
482 | |
483 | return 0; | |
484 | } | |
485 | ||
486 | /* | |
487 | * Present statistical information for this VFS mountpoint | |
488 | */ | |
489 | static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) | |
490 | { | |
491 | int i, cpu; | |
492 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
493 | struct rpc_auth *auth = nfss->client->cl_auth; | |
494 | struct nfs_iostats totals = { }; | |
495 | ||
496 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
497 | ||
498 | /* | |
499 | * Display all mount option settings | |
500 | */ | |
501 | seq_printf(m, "\n\topts:\t"); | |
502 | seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw"); | |
503 | seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); | |
504 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : ""); | |
505 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); | |
506 | nfs_show_mount_options(m, nfss, 1); | |
507 | ||
508 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); | |
509 | ||
510 | seq_printf(m, "\n\tcaps:\t"); | |
511 | seq_printf(m, "caps=0x%x", nfss->caps); | |
512 | seq_printf(m, ",wtmult=%d", nfss->wtmult); | |
513 | seq_printf(m, ",dtsize=%d", nfss->dtsize); | |
514 | seq_printf(m, ",bsize=%d", nfss->bsize); | |
515 | seq_printf(m, ",namelen=%d", nfss->namelen); | |
516 | ||
517 | #ifdef CONFIG_NFS_V4 | |
8fa5c000 | 518 | if (nfss->nfs_client->cl_nfsversion == 4) { |
f7b422b1 DH |
519 | seq_printf(m, "\n\tnfsv4:\t"); |
520 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); | |
521 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
522 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); | |
523 | } | |
524 | #endif | |
525 | ||
526 | /* | |
527 | * Display security flavor in effect for this mount | |
528 | */ | |
529 | seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor); | |
530 | if (auth->au_flavor) | |
531 | seq_printf(m, ",pseudoflavor=%d", auth->au_flavor); | |
532 | ||
533 | /* | |
534 | * Display superblock I/O counters | |
535 | */ | |
536 | for_each_possible_cpu(cpu) { | |
537 | struct nfs_iostats *stats; | |
538 | ||
539 | preempt_disable(); | |
540 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
541 | ||
542 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
543 | totals.events[i] += stats->events[i]; | |
544 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
545 | totals.bytes[i] += stats->bytes[i]; | |
546 | ||
547 | preempt_enable(); | |
548 | } | |
549 | ||
550 | seq_printf(m, "\n\tevents:\t"); | |
551 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
552 | seq_printf(m, "%lu ", totals.events[i]); | |
553 | seq_printf(m, "\n\tbytes:\t"); | |
554 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
555 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
556 | seq_printf(m, "\n"); | |
557 | ||
558 | rpc_print_iostats(m, nfss->client); | |
559 | ||
560 | return 0; | |
561 | } | |
562 | ||
563 | /* | |
564 | * Begin unmount by attempting to remove all automounted mountpoints we added | |
54ceac45 | 565 | * in response to xdev traversals and referrals |
f7b422b1 DH |
566 | */ |
567 | static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags) | |
568 | { | |
fc6ae3cf TM |
569 | struct nfs_server *server = NFS_SB(vfsmnt->mnt_sb); |
570 | struct rpc_clnt *rpc; | |
571 | ||
f7b422b1 | 572 | shrink_submounts(vfsmnt, &nfs_automount_list); |
fc6ae3cf TM |
573 | |
574 | if (!(flags & MNT_FORCE)) | |
575 | return; | |
576 | /* -EIO all pending I/O */ | |
577 | rpc = server->client_acl; | |
578 | if (!IS_ERR(rpc)) | |
579 | rpc_killall_tasks(rpc); | |
580 | rpc = server->client; | |
581 | if (!IS_ERR(rpc)) | |
582 | rpc_killall_tasks(rpc); | |
f7b422b1 DH |
583 | } |
584 | ||
fc50d58f CL |
585 | /* |
586 | * Sanity-check a server address provided by the mount command | |
587 | */ | |
588 | static int nfs_verify_server_address(struct sockaddr *addr) | |
589 | { | |
590 | switch (addr->sa_family) { | |
591 | case AF_INET: { | |
592 | struct sockaddr_in *sa = (struct sockaddr_in *) addr; | |
593 | if (sa->sin_addr.s_addr != INADDR_ANY) | |
594 | return 1; | |
595 | break; | |
596 | } | |
597 | } | |
598 | ||
599 | return 0; | |
600 | } | |
601 | ||
bf0fd768 CL |
602 | /* |
603 | * Error-check and convert a string of mount options from user space into | |
604 | * a data structure | |
605 | */ | |
606 | static int nfs_parse_mount_options(char *raw, | |
607 | struct nfs_parsed_mount_data *mnt) | |
608 | { | |
609 | char *p, *string; | |
610 | ||
611 | if (!raw) { | |
612 | dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); | |
613 | return 1; | |
614 | } | |
615 | dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); | |
616 | ||
617 | while ((p = strsep(&raw, ",")) != NULL) { | |
618 | substring_t args[MAX_OPT_ARGS]; | |
619 | int option, token; | |
620 | ||
621 | if (!*p) | |
622 | continue; | |
623 | ||
624 | dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); | |
625 | ||
626 | token = match_token(p, nfs_mount_option_tokens, args); | |
627 | switch (token) { | |
628 | case Opt_soft: | |
629 | mnt->flags |= NFS_MOUNT_SOFT; | |
630 | break; | |
631 | case Opt_hard: | |
632 | mnt->flags &= ~NFS_MOUNT_SOFT; | |
633 | break; | |
634 | case Opt_intr: | |
635 | mnt->flags |= NFS_MOUNT_INTR; | |
636 | break; | |
637 | case Opt_nointr: | |
638 | mnt->flags &= ~NFS_MOUNT_INTR; | |
639 | break; | |
640 | case Opt_posix: | |
641 | mnt->flags |= NFS_MOUNT_POSIX; | |
642 | break; | |
643 | case Opt_noposix: | |
644 | mnt->flags &= ~NFS_MOUNT_POSIX; | |
645 | break; | |
646 | case Opt_cto: | |
647 | mnt->flags &= ~NFS_MOUNT_NOCTO; | |
648 | break; | |
649 | case Opt_nocto: | |
650 | mnt->flags |= NFS_MOUNT_NOCTO; | |
651 | break; | |
652 | case Opt_ac: | |
653 | mnt->flags &= ~NFS_MOUNT_NOAC; | |
654 | break; | |
655 | case Opt_noac: | |
656 | mnt->flags |= NFS_MOUNT_NOAC; | |
657 | break; | |
658 | case Opt_lock: | |
659 | mnt->flags &= ~NFS_MOUNT_NONLM; | |
660 | break; | |
661 | case Opt_nolock: | |
662 | mnt->flags |= NFS_MOUNT_NONLM; | |
663 | break; | |
664 | case Opt_v2: | |
665 | mnt->flags &= ~NFS_MOUNT_VER3; | |
666 | break; | |
667 | case Opt_v3: | |
668 | mnt->flags |= NFS_MOUNT_VER3; | |
669 | break; | |
670 | case Opt_udp: | |
671 | mnt->flags &= ~NFS_MOUNT_TCP; | |
672 | mnt->nfs_server.protocol = IPPROTO_UDP; | |
673 | mnt->timeo = 7; | |
674 | mnt->retrans = 5; | |
675 | break; | |
676 | case Opt_tcp: | |
677 | mnt->flags |= NFS_MOUNT_TCP; | |
678 | mnt->nfs_server.protocol = IPPROTO_TCP; | |
679 | mnt->timeo = 600; | |
680 | mnt->retrans = 2; | |
681 | break; | |
682 | case Opt_acl: | |
683 | mnt->flags &= ~NFS_MOUNT_NOACL; | |
684 | break; | |
685 | case Opt_noacl: | |
686 | mnt->flags |= NFS_MOUNT_NOACL; | |
687 | break; | |
688 | case Opt_rdirplus: | |
689 | mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; | |
690 | break; | |
691 | case Opt_nordirplus: | |
692 | mnt->flags |= NFS_MOUNT_NORDIRPLUS; | |
693 | break; | |
75180df2 TM |
694 | case Opt_sharecache: |
695 | mnt->flags &= ~NFS_MOUNT_UNSHARED; | |
696 | break; | |
697 | case Opt_nosharecache: | |
698 | mnt->flags |= NFS_MOUNT_UNSHARED; | |
699 | break; | |
bf0fd768 CL |
700 | |
701 | case Opt_port: | |
702 | if (match_int(args, &option)) | |
703 | return 0; | |
704 | if (option < 0 || option > 65535) | |
705 | return 0; | |
41089644 | 706 | mnt->nfs_server.address.sin_port = htons(option); |
bf0fd768 CL |
707 | break; |
708 | case Opt_rsize: | |
709 | if (match_int(args, &mnt->rsize)) | |
710 | return 0; | |
711 | break; | |
712 | case Opt_wsize: | |
713 | if (match_int(args, &mnt->wsize)) | |
714 | return 0; | |
715 | break; | |
716 | case Opt_bsize: | |
717 | if (match_int(args, &option)) | |
718 | return 0; | |
719 | if (option < 0) | |
720 | return 0; | |
721 | mnt->bsize = option; | |
722 | break; | |
723 | case Opt_timeo: | |
724 | if (match_int(args, &mnt->timeo)) | |
725 | return 0; | |
726 | break; | |
727 | case Opt_retrans: | |
728 | if (match_int(args, &mnt->retrans)) | |
729 | return 0; | |
730 | break; | |
731 | case Opt_acregmin: | |
732 | if (match_int(args, &mnt->acregmin)) | |
733 | return 0; | |
734 | break; | |
735 | case Opt_acregmax: | |
736 | if (match_int(args, &mnt->acregmax)) | |
737 | return 0; | |
738 | break; | |
739 | case Opt_acdirmin: | |
740 | if (match_int(args, &mnt->acdirmin)) | |
741 | return 0; | |
742 | break; | |
743 | case Opt_acdirmax: | |
744 | if (match_int(args, &mnt->acdirmax)) | |
745 | return 0; | |
746 | break; | |
747 | case Opt_actimeo: | |
748 | if (match_int(args, &option)) | |
749 | return 0; | |
750 | if (option < 0) | |
751 | return 0; | |
752 | mnt->acregmin = | |
753 | mnt->acregmax = | |
754 | mnt->acdirmin = | |
755 | mnt->acdirmax = option; | |
756 | break; | |
757 | case Opt_namelen: | |
758 | if (match_int(args, &mnt->namlen)) | |
759 | return 0; | |
760 | break; | |
761 | case Opt_mountport: | |
762 | if (match_int(args, &option)) | |
763 | return 0; | |
764 | if (option < 0 || option > 65535) | |
765 | return 0; | |
766 | mnt->mount_server.port = option; | |
767 | break; | |
768 | case Opt_mountprog: | |
769 | if (match_int(args, &option)) | |
770 | return 0; | |
771 | if (option < 0) | |
772 | return 0; | |
773 | mnt->mount_server.program = option; | |
774 | break; | |
775 | case Opt_mountvers: | |
776 | if (match_int(args, &option)) | |
777 | return 0; | |
778 | if (option < 0) | |
779 | return 0; | |
780 | mnt->mount_server.version = option; | |
781 | break; | |
782 | case Opt_nfsprog: | |
783 | if (match_int(args, &option)) | |
784 | return 0; | |
785 | if (option < 0) | |
786 | return 0; | |
787 | mnt->nfs_server.program = option; | |
788 | break; | |
789 | case Opt_nfsvers: | |
790 | if (match_int(args, &option)) | |
791 | return 0; | |
792 | switch (option) { | |
793 | case 2: | |
794 | mnt->flags &= ~NFS_MOUNT_VER3; | |
795 | break; | |
796 | case 3: | |
797 | mnt->flags |= NFS_MOUNT_VER3; | |
798 | break; | |
799 | default: | |
800 | goto out_unrec_vers; | |
801 | } | |
802 | break; | |
803 | ||
804 | case Opt_sec: | |
805 | string = match_strdup(args); | |
806 | if (string == NULL) | |
807 | goto out_nomem; | |
808 | token = match_token(string, nfs_secflavor_tokens, args); | |
809 | kfree(string); | |
810 | ||
811 | /* | |
812 | * The flags setting is for v2/v3. The flavor_len | |
813 | * setting is for v4. v2/v3 also need to know the | |
814 | * difference between NULL and UNIX. | |
815 | */ | |
816 | switch (token) { | |
817 | case Opt_sec_none: | |
818 | mnt->flags &= ~NFS_MOUNT_SECFLAVOUR; | |
819 | mnt->auth_flavor_len = 0; | |
820 | mnt->auth_flavors[0] = RPC_AUTH_NULL; | |
821 | break; | |
822 | case Opt_sec_sys: | |
823 | mnt->flags &= ~NFS_MOUNT_SECFLAVOUR; | |
824 | mnt->auth_flavor_len = 0; | |
825 | mnt->auth_flavors[0] = RPC_AUTH_UNIX; | |
826 | break; | |
827 | case Opt_sec_krb5: | |
828 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
829 | mnt->auth_flavor_len = 1; | |
830 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5; | |
831 | break; | |
832 | case Opt_sec_krb5i: | |
833 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
834 | mnt->auth_flavor_len = 1; | |
835 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I; | |
836 | break; | |
837 | case Opt_sec_krb5p: | |
838 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
839 | mnt->auth_flavor_len = 1; | |
840 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P; | |
841 | break; | |
842 | case Opt_sec_lkey: | |
843 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
844 | mnt->auth_flavor_len = 1; | |
845 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY; | |
846 | break; | |
847 | case Opt_sec_lkeyi: | |
848 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
849 | mnt->auth_flavor_len = 1; | |
850 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI; | |
851 | break; | |
852 | case Opt_sec_lkeyp: | |
853 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
854 | mnt->auth_flavor_len = 1; | |
855 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP; | |
856 | break; | |
857 | case Opt_sec_spkm: | |
858 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
859 | mnt->auth_flavor_len = 1; | |
860 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM; | |
861 | break; | |
862 | case Opt_sec_spkmi: | |
863 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
864 | mnt->auth_flavor_len = 1; | |
865 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI; | |
866 | break; | |
867 | case Opt_sec_spkmp: | |
868 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
869 | mnt->auth_flavor_len = 1; | |
870 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP; | |
871 | break; | |
872 | default: | |
873 | goto out_unrec_sec; | |
874 | } | |
875 | break; | |
876 | case Opt_proto: | |
877 | string = match_strdup(args); | |
878 | if (string == NULL) | |
879 | goto out_nomem; | |
880 | token = match_token(string, | |
881 | nfs_xprt_protocol_tokens, args); | |
882 | kfree(string); | |
883 | ||
884 | switch (token) { | |
fdb66ff4 | 885 | case Opt_xprt_udp: |
bf0fd768 CL |
886 | mnt->flags &= ~NFS_MOUNT_TCP; |
887 | mnt->nfs_server.protocol = IPPROTO_UDP; | |
888 | mnt->timeo = 7; | |
889 | mnt->retrans = 5; | |
890 | break; | |
fdb66ff4 | 891 | case Opt_xprt_tcp: |
bf0fd768 CL |
892 | mnt->flags |= NFS_MOUNT_TCP; |
893 | mnt->nfs_server.protocol = IPPROTO_TCP; | |
894 | mnt->timeo = 600; | |
895 | mnt->retrans = 2; | |
896 | break; | |
897 | default: | |
898 | goto out_unrec_xprt; | |
899 | } | |
900 | break; | |
901 | case Opt_mountproto: | |
902 | string = match_strdup(args); | |
903 | if (string == NULL) | |
904 | goto out_nomem; | |
905 | token = match_token(string, | |
906 | nfs_xprt_protocol_tokens, args); | |
907 | kfree(string); | |
908 | ||
909 | switch (token) { | |
fdb66ff4 | 910 | case Opt_xprt_udp: |
bf0fd768 CL |
911 | mnt->mount_server.protocol = IPPROTO_UDP; |
912 | break; | |
fdb66ff4 | 913 | case Opt_xprt_tcp: |
bf0fd768 CL |
914 | mnt->mount_server.protocol = IPPROTO_TCP; |
915 | break; | |
916 | default: | |
917 | goto out_unrec_xprt; | |
918 | } | |
919 | break; | |
920 | case Opt_addr: | |
921 | string = match_strdup(args); | |
922 | if (string == NULL) | |
923 | goto out_nomem; | |
924 | mnt->nfs_server.address.sin_family = AF_INET; | |
925 | mnt->nfs_server.address.sin_addr.s_addr = | |
926 | in_aton(string); | |
927 | kfree(string); | |
928 | break; | |
929 | case Opt_clientaddr: | |
930 | string = match_strdup(args); | |
931 | if (string == NULL) | |
932 | goto out_nomem; | |
933 | mnt->client_address = string; | |
934 | break; | |
0ac83779 | 935 | case Opt_mountaddr: |
bf0fd768 CL |
936 | string = match_strdup(args); |
937 | if (string == NULL) | |
938 | goto out_nomem; | |
939 | mnt->mount_server.address.sin_family = AF_INET; | |
940 | mnt->mount_server.address.sin_addr.s_addr = | |
941 | in_aton(string); | |
942 | kfree(string); | |
943 | break; | |
944 | ||
945 | case Opt_userspace: | |
946 | case Opt_deprecated: | |
947 | break; | |
948 | ||
949 | default: | |
950 | goto out_unknown; | |
951 | } | |
952 | } | |
953 | ||
954 | return 1; | |
955 | ||
956 | out_nomem: | |
957 | printk(KERN_INFO "NFS: not enough memory to parse option\n"); | |
958 | return 0; | |
959 | ||
960 | out_unrec_vers: | |
961 | printk(KERN_INFO "NFS: unrecognized NFS version number\n"); | |
962 | return 0; | |
963 | ||
964 | out_unrec_xprt: | |
965 | printk(KERN_INFO "NFS: unrecognized transport protocol\n"); | |
966 | return 0; | |
967 | ||
968 | out_unrec_sec: | |
969 | printk(KERN_INFO "NFS: unrecognized security flavor\n"); | |
970 | return 0; | |
971 | ||
972 | out_unknown: | |
973 | printk(KERN_INFO "NFS: unknown mount option: %s\n", p); | |
974 | return 0; | |
975 | } | |
976 | ||
0076d7b7 CL |
977 | /* |
978 | * Use the remote server's MOUNT service to request the NFS file handle | |
979 | * corresponding to the provided path. | |
980 | */ | |
981 | static int nfs_try_mount(struct nfs_parsed_mount_data *args, | |
982 | struct nfs_fh *root_fh) | |
983 | { | |
984 | struct sockaddr_in sin; | |
985 | int status; | |
986 | ||
987 | if (args->mount_server.version == 0) { | |
988 | if (args->flags & NFS_MOUNT_VER3) | |
989 | args->mount_server.version = NFS_MNT3_VERSION; | |
990 | else | |
991 | args->mount_server.version = NFS_MNT_VERSION; | |
992 | } | |
993 | ||
994 | /* | |
995 | * Construct the mount server's address. | |
996 | */ | |
997 | if (args->mount_server.address.sin_addr.s_addr != INADDR_ANY) | |
998 | sin = args->mount_server.address; | |
999 | else | |
1000 | sin = args->nfs_server.address; | |
aad70007 JL |
1001 | /* |
1002 | * autobind will be used if mount_server.port == 0 | |
1003 | */ | |
1004 | sin.sin_port = htons(args->mount_server.port); | |
0076d7b7 CL |
1005 | |
1006 | /* | |
1007 | * Now ask the mount server to map our export path | |
1008 | * to a file handle. | |
1009 | */ | |
1010 | status = nfs_mount((struct sockaddr *) &sin, | |
1011 | sizeof(sin), | |
1012 | args->nfs_server.hostname, | |
1013 | args->nfs_server.export_path, | |
1014 | args->mount_server.version, | |
1015 | args->mount_server.protocol, | |
1016 | root_fh); | |
efd8340b CL |
1017 | if (status == 0) |
1018 | return 0; | |
0076d7b7 | 1019 | |
efd8340b CL |
1020 | dfprintk(MOUNT, "NFS: unable to mount server " NIPQUAD_FMT |
1021 | ", error %d\n", NIPQUAD(sin.sin_addr.s_addr), status); | |
0076d7b7 CL |
1022 | return status; |
1023 | } | |
1024 | ||
f7b422b1 | 1025 | /* |
54ceac45 DH |
1026 | * Validate the NFS2/NFS3 mount data |
1027 | * - fills in the mount root filehandle | |
136d558c CL |
1028 | * |
1029 | * For option strings, user space handles the following behaviors: | |
1030 | * | |
1031 | * + DNS: mapping server host name to IP address ("addr=" option) | |
1032 | * | |
1033 | * + failure mode: how to behave if a mount request can't be handled | |
1034 | * immediately ("fg/bg" option) | |
1035 | * | |
1036 | * + retry: how often to retry a mount request ("retry=" option) | |
1037 | * | |
1038 | * + breaking back: trying proto=udp after proto=tcp, v2 after v3, | |
1039 | * mountproto=tcp after mountproto=udp, and so on | |
1040 | * | |
1041 | * XXX: as far as I can tell, changing the NFS program number is not | |
1042 | * supported in the NFS client. | |
f7b422b1 | 1043 | */ |
2283f8d6 TT |
1044 | static int nfs_validate_mount_data(void *options, |
1045 | struct nfs_parsed_mount_data *args, | |
136d558c CL |
1046 | struct nfs_fh *mntfh, |
1047 | const char *dev_name) | |
f7b422b1 | 1048 | { |
2283f8d6 | 1049 | struct nfs_mount_data *data = (struct nfs_mount_data *)options; |
136d558c | 1050 | |
5df36e78 CL |
1051 | if (data == NULL) |
1052 | goto out_no_data; | |
f7b422b1 | 1053 | |
2283f8d6 TT |
1054 | memset(args, 0, sizeof(*args)); |
1055 | args->flags = (NFS_MOUNT_VER3 | NFS_MOUNT_TCP); | |
1056 | args->rsize = NFS_MAX_FILE_IO_SIZE; | |
1057 | args->wsize = NFS_MAX_FILE_IO_SIZE; | |
1058 | args->timeo = 600; | |
1059 | args->retrans = 2; | |
1060 | args->acregmin = 3; | |
1061 | args->acregmax = 60; | |
1062 | args->acdirmin = 30; | |
1063 | args->acdirmax = 60; | |
1064 | args->mount_server.protocol = IPPROTO_UDP; | |
1065 | args->mount_server.program = NFS_MNT_PROGRAM; | |
1066 | args->nfs_server.protocol = IPPROTO_TCP; | |
1067 | args->nfs_server.program = NFS_PROGRAM; | |
1068 | ||
54ceac45 | 1069 | switch (data->version) { |
5df36e78 CL |
1070 | case 1: |
1071 | data->namlen = 0; | |
1072 | case 2: | |
1073 | data->bsize = 0; | |
1074 | case 3: | |
1075 | if (data->flags & NFS_MOUNT_VER3) | |
1076 | goto out_no_v3; | |
1077 | data->root.size = NFS2_FHSIZE; | |
1078 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
1079 | case 4: | |
1080 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1081 | goto out_no_sec; | |
1082 | case 5: | |
1083 | memset(data->context, 0, sizeof(data->context)); | |
1084 | case 6: | |
1085 | if (data->flags & NFS_MOUNT_VER3) | |
1086 | mntfh->size = data->root.size; | |
1087 | else | |
1088 | mntfh->size = NFS2_FHSIZE; | |
1089 | ||
1090 | if (mntfh->size > sizeof(mntfh->data)) | |
1091 | goto out_invalid_fh; | |
1092 | ||
1093 | memcpy(mntfh->data, data->root.data, mntfh->size); | |
1094 | if (mntfh->size < sizeof(mntfh->data)) | |
1095 | memset(mntfh->data + mntfh->size, 0, | |
1096 | sizeof(mntfh->data) - mntfh->size); | |
2283f8d6 TT |
1097 | /* |
1098 | * Translate to nfs_parsed_mount_data, which nfs_fill_super | |
1099 | * can deal with. | |
1100 | */ | |
1101 | args->flags = data->flags; | |
1102 | args->rsize = data->rsize; | |
1103 | args->wsize = data->wsize; | |
1104 | args->flags = data->flags; | |
1105 | args->timeo = data->timeo; | |
1106 | args->retrans = data->retrans; | |
1107 | args->acregmin = data->acregmin; | |
1108 | args->acregmax = data->acregmax; | |
1109 | args->acdirmin = data->acdirmin; | |
1110 | args->acdirmax = data->acdirmax; | |
1111 | args->nfs_server.address = data->addr; | |
1112 | if (!(data->flags & NFS_MOUNT_TCP)) | |
1113 | args->nfs_server.protocol = IPPROTO_UDP; | |
1114 | /* N.B. caller will free nfs_server.hostname in all cases */ | |
1115 | args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); | |
1116 | args->namlen = data->namlen; | |
1117 | args->bsize = data->bsize; | |
1118 | args->auth_flavors[0] = data->pseudoflavor; | |
5df36e78 | 1119 | break; |
136d558c CL |
1120 | default: { |
1121 | unsigned int len; | |
1122 | char *c; | |
1123 | int status; | |
136d558c | 1124 | |
2283f8d6 TT |
1125 | if (nfs_parse_mount_options((char *)options, args) == 0) |
1126 | return -EINVAL; | |
136d558c CL |
1127 | |
1128 | c = strchr(dev_name, ':'); | |
1129 | if (c == NULL) | |
1130 | return -EINVAL; | |
350c73af | 1131 | len = c - dev_name; |
2283f8d6 TT |
1132 | /* N.B. caller will free nfs_server.hostname in all cases */ |
1133 | args->nfs_server.hostname = kstrndup(dev_name, len, GFP_KERNEL); | |
136d558c CL |
1134 | |
1135 | c++; | |
1136 | if (strlen(c) > NFS_MAXPATHLEN) | |
7d1cca72 | 1137 | return -ENAMETOOLONG; |
2283f8d6 | 1138 | args->nfs_server.export_path = c; |
136d558c | 1139 | |
2283f8d6 | 1140 | status = nfs_try_mount(args, mntfh); |
136d558c | 1141 | if (status) |
fdc6e2c8 | 1142 | return status; |
136d558c | 1143 | |
136d558c CL |
1144 | break; |
1145 | } | |
f7b422b1 | 1146 | } |
54ceac45 | 1147 | |
2283f8d6 TT |
1148 | if (!(args->flags & NFS_MOUNT_SECFLAVOUR)) |
1149 | args->auth_flavors[0] = RPC_AUTH_UNIX; | |
36b15c54 | 1150 | |
54ceac45 | 1151 | #ifndef CONFIG_NFS_V3 |
2283f8d6 | 1152 | if (args->flags & NFS_MOUNT_VER3) |
5df36e78 CL |
1153 | goto out_v3_not_compiled; |
1154 | #endif /* !CONFIG_NFS_V3 */ | |
f7b422b1 | 1155 | |
2283f8d6 TT |
1156 | if (!nfs_verify_server_address((struct sockaddr *) |
1157 | &args->nfs_server.address)) | |
5df36e78 | 1158 | goto out_no_address; |
f7b422b1 | 1159 | |
5df36e78 | 1160 | return 0; |
f7b422b1 | 1161 | |
5df36e78 CL |
1162 | out_no_data: |
1163 | dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); | |
1164 | return -EINVAL; | |
54ceac45 | 1165 | |
5df36e78 CL |
1166 | out_no_v3: |
1167 | dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", | |
1168 | data->version); | |
1169 | return -EINVAL; | |
f7b422b1 | 1170 | |
5df36e78 CL |
1171 | out_no_sec: |
1172 | dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); | |
1173 | return -EINVAL; | |
1174 | ||
5df36e78 CL |
1175 | #ifndef CONFIG_NFS_V3 |
1176 | out_v3_not_compiled: | |
1177 | dfprintk(MOUNT, "NFS: NFSv3 is not compiled into kernel\n"); | |
1178 | return -EPROTONOSUPPORT; | |
1179 | #endif /* !CONFIG_NFS_V3 */ | |
1180 | ||
1181 | out_no_address: | |
1182 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); | |
1183 | return -EINVAL; | |
1184 | ||
1185 | out_invalid_fh: | |
1186 | dfprintk(MOUNT, "NFS: invalid root filehandle\n"); | |
1187 | return -EINVAL; | |
f7b422b1 DH |
1188 | } |
1189 | ||
f7b422b1 | 1190 | /* |
54ceac45 | 1191 | * Initialise the common bits of the superblock |
f7b422b1 | 1192 | */ |
54ceac45 | 1193 | static inline void nfs_initialise_sb(struct super_block *sb) |
f7b422b1 | 1194 | { |
54ceac45 | 1195 | struct nfs_server *server = NFS_SB(sb); |
5006a76c | 1196 | |
54ceac45 | 1197 | sb->s_magic = NFS_SUPER_MAGIC; |
f7b422b1 | 1198 | |
54ceac45 DH |
1199 | /* We probably want something more informative here */ |
1200 | snprintf(sb->s_id, sizeof(sb->s_id), | |
1201 | "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev)); | |
5006a76c | 1202 | |
54ceac45 DH |
1203 | if (sb->s_blocksize == 0) |
1204 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
1205 | &sb->s_blocksize_bits); | |
f7b422b1 | 1206 | |
54ceac45 DH |
1207 | if (server->flags & NFS_MOUNT_NOAC) |
1208 | sb->s_flags |= MS_SYNCHRONOUS; | |
f7b422b1 | 1209 | |
54ceac45 | 1210 | nfs_super_set_maxbytes(sb, server->maxfilesize); |
f7b422b1 DH |
1211 | } |
1212 | ||
1213 | /* | |
54ceac45 | 1214 | * Finish setting up an NFS2/3 superblock |
f7b422b1 | 1215 | */ |
2283f8d6 TT |
1216 | static void nfs_fill_super(struct super_block *sb, |
1217 | struct nfs_parsed_mount_data *data) | |
f7b422b1 DH |
1218 | { |
1219 | struct nfs_server *server = NFS_SB(sb); | |
5006a76c | 1220 | |
54ceac45 DH |
1221 | sb->s_blocksize_bits = 0; |
1222 | sb->s_blocksize = 0; | |
1223 | if (data->bsize) | |
1224 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); | |
f7b422b1 | 1225 | |
54ceac45 DH |
1226 | if (server->flags & NFS_MOUNT_VER3) { |
1227 | /* The VFS shouldn't apply the umask to mode bits. We will do | |
1228 | * so ourselves when necessary. | |
1229 | */ | |
1230 | sb->s_flags |= MS_POSIXACL; | |
1231 | sb->s_time_gran = 1; | |
816724e6 | 1232 | } |
54ceac45 DH |
1233 | |
1234 | sb->s_op = &nfs_sops; | |
1235 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1236 | } |
1237 | ||
1238 | /* | |
54ceac45 | 1239 | * Finish setting up a cloned NFS2/3 superblock |
f7b422b1 | 1240 | */ |
54ceac45 DH |
1241 | static void nfs_clone_super(struct super_block *sb, |
1242 | const struct super_block *old_sb) | |
f7b422b1 | 1243 | { |
54ceac45 DH |
1244 | struct nfs_server *server = NFS_SB(sb); |
1245 | ||
1246 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; | |
1247 | sb->s_blocksize = old_sb->s_blocksize; | |
1248 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 1249 | |
f7b422b1 | 1250 | if (server->flags & NFS_MOUNT_VER3) { |
54ceac45 DH |
1251 | /* The VFS shouldn't apply the umask to mode bits. We will do |
1252 | * so ourselves when necessary. | |
f7b422b1 DH |
1253 | */ |
1254 | sb->s_flags |= MS_POSIXACL; | |
f7b422b1 | 1255 | sb->s_time_gran = 1; |
f7b422b1 DH |
1256 | } |
1257 | ||
54ceac45 DH |
1258 | sb->s_op = old_sb->s_op; |
1259 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1260 | } |
1261 | ||
275a5d24 TM |
1262 | #define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS) |
1263 | ||
1264 | static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags) | |
1265 | { | |
1266 | const struct nfs_server *a = s->s_fs_info; | |
1267 | const struct rpc_clnt *clnt_a = a->client; | |
1268 | const struct rpc_clnt *clnt_b = b->client; | |
1269 | ||
1270 | if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK)) | |
1271 | goto Ebusy; | |
1272 | if (a->nfs_client != b->nfs_client) | |
1273 | goto Ebusy; | |
1274 | if (a->flags != b->flags) | |
1275 | goto Ebusy; | |
1276 | if (a->wsize != b->wsize) | |
1277 | goto Ebusy; | |
1278 | if (a->rsize != b->rsize) | |
1279 | goto Ebusy; | |
1280 | if (a->acregmin != b->acregmin) | |
1281 | goto Ebusy; | |
1282 | if (a->acregmax != b->acregmax) | |
1283 | goto Ebusy; | |
1284 | if (a->acdirmin != b->acdirmin) | |
1285 | goto Ebusy; | |
1286 | if (a->acdirmax != b->acdirmax) | |
1287 | goto Ebusy; | |
1288 | if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) | |
1289 | goto Ebusy; | |
e89a5a43 | 1290 | return 1; |
275a5d24 | 1291 | Ebusy: |
e89a5a43 TM |
1292 | return 0; |
1293 | } | |
1294 | ||
1295 | struct nfs_sb_mountdata { | |
1296 | struct nfs_server *server; | |
1297 | int mntflags; | |
1298 | }; | |
1299 | ||
1300 | static int nfs_set_super(struct super_block *s, void *data) | |
1301 | { | |
1302 | struct nfs_sb_mountdata *sb_mntdata = data; | |
1303 | struct nfs_server *server = sb_mntdata->server; | |
1304 | int ret; | |
1305 | ||
1306 | s->s_flags = sb_mntdata->mntflags; | |
1307 | s->s_fs_info = server; | |
1308 | ret = set_anon_super(s, server); | |
1309 | if (ret == 0) | |
1310 | server->s_dev = s->s_dev; | |
1311 | return ret; | |
1312 | } | |
1313 | ||
1314 | static int nfs_compare_super(struct super_block *sb, void *data) | |
1315 | { | |
1316 | struct nfs_sb_mountdata *sb_mntdata = data; | |
1317 | struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb); | |
1318 | int mntflags = sb_mntdata->mntflags; | |
1319 | ||
1320 | if (memcmp(&old->nfs_client->cl_addr, | |
1321 | &server->nfs_client->cl_addr, | |
1322 | sizeof(old->nfs_client->cl_addr)) != 0) | |
1323 | return 0; | |
1324 | /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */ | |
1325 | if (old->flags & NFS_MOUNT_UNSHARED) | |
1326 | return 0; | |
1327 | if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0) | |
1328 | return 0; | |
1329 | return nfs_compare_mount_options(sb, server, mntflags); | |
275a5d24 TM |
1330 | } |
1331 | ||
816724e6 TM |
1332 | static int nfs_get_sb(struct file_system_type *fs_type, |
1333 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
f7b422b1 | 1334 | { |
f7b422b1 DH |
1335 | struct nfs_server *server = NULL; |
1336 | struct super_block *s; | |
54ceac45 | 1337 | struct nfs_fh mntfh; |
2283f8d6 | 1338 | struct nfs_parsed_mount_data data; |
54ceac45 | 1339 | struct dentry *mntroot; |
75180df2 | 1340 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1341 | struct nfs_sb_mountdata sb_mntdata = { |
1342 | .mntflags = flags, | |
1343 | }; | |
54ceac45 | 1344 | int error; |
f7b422b1 | 1345 | |
54ceac45 | 1346 | /* Validate the mount data */ |
2283f8d6 | 1347 | error = nfs_validate_mount_data(raw_data, &data, &mntfh, dev_name); |
54ceac45 | 1348 | if (error < 0) |
0655960f | 1349 | goto out; |
f7b422b1 | 1350 | |
54ceac45 | 1351 | /* Get a volume representation */ |
2283f8d6 | 1352 | server = nfs_create_server(&data, &mntfh); |
54ceac45 DH |
1353 | if (IS_ERR(server)) { |
1354 | error = PTR_ERR(server); | |
0655960f | 1355 | goto out; |
f7b422b1 | 1356 | } |
e89a5a43 | 1357 | sb_mntdata.server = server; |
f7b422b1 | 1358 | |
75180df2 TM |
1359 | if (server->flags & NFS_MOUNT_UNSHARED) |
1360 | compare_super = NULL; | |
1361 | ||
54ceac45 | 1362 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1363 | s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
1364 | if (IS_ERR(s)) { |
1365 | error = PTR_ERR(s); | |
54ceac45 | 1366 | goto out_err_nosb; |
816724e6 TM |
1367 | } |
1368 | ||
54ceac45 DH |
1369 | if (s->s_fs_info != server) { |
1370 | nfs_free_server(server); | |
1371 | server = NULL; | |
1372 | } | |
f7b422b1 | 1373 | |
54ceac45 DH |
1374 | if (!s->s_root) { |
1375 | /* initial superblock/root creation */ | |
2283f8d6 | 1376 | nfs_fill_super(s, &data); |
54ceac45 | 1377 | } |
f7b422b1 | 1378 | |
54ceac45 DH |
1379 | mntroot = nfs_get_root(s, &mntfh); |
1380 | if (IS_ERR(mntroot)) { | |
1381 | error = PTR_ERR(mntroot); | |
1382 | goto error_splat_super; | |
f7b422b1 | 1383 | } |
816724e6 | 1384 | |
54ceac45 DH |
1385 | s->s_flags |= MS_ACTIVE; |
1386 | mnt->mnt_sb = s; | |
1387 | mnt->mnt_root = mntroot; | |
0655960f CL |
1388 | error = 0; |
1389 | ||
1390 | out: | |
2283f8d6 | 1391 | kfree(data.nfs_server.hostname); |
0655960f | 1392 | return error; |
816724e6 | 1393 | |
54ceac45 DH |
1394 | out_err_nosb: |
1395 | nfs_free_server(server); | |
0655960f | 1396 | goto out; |
54ceac45 DH |
1397 | |
1398 | error_splat_super: | |
1399 | up_write(&s->s_umount); | |
1400 | deactivate_super(s); | |
0655960f | 1401 | goto out; |
f7b422b1 DH |
1402 | } |
1403 | ||
54ceac45 DH |
1404 | /* |
1405 | * Destroy an NFS2/3 superblock | |
1406 | */ | |
f7b422b1 DH |
1407 | static void nfs_kill_super(struct super_block *s) |
1408 | { | |
1409 | struct nfs_server *server = NFS_SB(s); | |
1410 | ||
1411 | kill_anon_super(s); | |
54ceac45 | 1412 | nfs_free_server(server); |
f7b422b1 DH |
1413 | } |
1414 | ||
54ceac45 DH |
1415 | /* |
1416 | * Clone an NFS2/3 server record on xdev traversal (FSID-change) | |
1417 | */ | |
1418 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags, | |
1419 | const char *dev_name, void *raw_data, | |
1420 | struct vfsmount *mnt) | |
f7b422b1 DH |
1421 | { |
1422 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
1423 | struct super_block *s; |
1424 | struct nfs_server *server; | |
1425 | struct dentry *mntroot; | |
75180df2 | 1426 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1427 | struct nfs_sb_mountdata sb_mntdata = { |
1428 | .mntflags = flags, | |
1429 | }; | |
54ceac45 | 1430 | int error; |
f7b422b1 | 1431 | |
54ceac45 | 1432 | dprintk("--> nfs_xdev_get_sb()\n"); |
f7b422b1 | 1433 | |
54ceac45 DH |
1434 | /* create a new volume representation */ |
1435 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
1436 | if (IS_ERR(server)) { | |
1437 | error = PTR_ERR(server); | |
1438 | goto out_err_noserver; | |
1439 | } | |
e89a5a43 | 1440 | sb_mntdata.server = server; |
8fa5c000 | 1441 | |
75180df2 TM |
1442 | if (server->flags & NFS_MOUNT_UNSHARED) |
1443 | compare_super = NULL; | |
1444 | ||
54ceac45 | 1445 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1446 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
1447 | if (IS_ERR(s)) { |
1448 | error = PTR_ERR(s); | |
1449 | goto out_err_nosb; | |
1450 | } | |
5006a76c | 1451 | |
54ceac45 DH |
1452 | if (s->s_fs_info != server) { |
1453 | nfs_free_server(server); | |
1454 | server = NULL; | |
f7b422b1 | 1455 | } |
24c8dbbb | 1456 | |
54ceac45 DH |
1457 | if (!s->s_root) { |
1458 | /* initial superblock/root creation */ | |
54ceac45 DH |
1459 | nfs_clone_super(s, data->sb); |
1460 | } | |
f7b422b1 | 1461 | |
54ceac45 DH |
1462 | mntroot = nfs_get_root(s, data->fh); |
1463 | if (IS_ERR(mntroot)) { | |
1464 | error = PTR_ERR(mntroot); | |
1465 | goto error_splat_super; | |
f7b422b1 DH |
1466 | } |
1467 | ||
54ceac45 DH |
1468 | s->s_flags |= MS_ACTIVE; |
1469 | mnt->mnt_sb = s; | |
1470 | mnt->mnt_root = mntroot; | |
f7b422b1 | 1471 | |
54ceac45 DH |
1472 | dprintk("<-- nfs_xdev_get_sb() = 0\n"); |
1473 | return 0; | |
24c8dbbb | 1474 | |
54ceac45 DH |
1475 | out_err_nosb: |
1476 | nfs_free_server(server); | |
1477 | out_err_noserver: | |
1478 | dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error); | |
1479 | return error; | |
f7b422b1 | 1480 | |
54ceac45 DH |
1481 | error_splat_super: |
1482 | up_write(&s->s_umount); | |
1483 | deactivate_super(s); | |
1484 | dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error); | |
1485 | return error; | |
f7b422b1 DH |
1486 | } |
1487 | ||
54ceac45 DH |
1488 | #ifdef CONFIG_NFS_V4 |
1489 | ||
f7b422b1 | 1490 | /* |
54ceac45 | 1491 | * Finish setting up a cloned NFS4 superblock |
f7b422b1 | 1492 | */ |
54ceac45 DH |
1493 | static void nfs4_clone_super(struct super_block *sb, |
1494 | const struct super_block *old_sb) | |
f7b422b1 | 1495 | { |
54ceac45 DH |
1496 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; |
1497 | sb->s_blocksize = old_sb->s_blocksize; | |
1498 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 1499 | sb->s_time_gran = 1; |
54ceac45 DH |
1500 | sb->s_op = old_sb->s_op; |
1501 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1502 | } |
1503 | ||
54ceac45 DH |
1504 | /* |
1505 | * Set up an NFS4 superblock | |
1506 | */ | |
1507 | static void nfs4_fill_super(struct super_block *sb) | |
f7b422b1 | 1508 | { |
54ceac45 DH |
1509 | sb->s_time_gran = 1; |
1510 | sb->s_op = &nfs4_sops; | |
1511 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1512 | } |
1513 | ||
f0768ebd CL |
1514 | /* |
1515 | * Validate NFSv4 mount options | |
1516 | */ | |
91ea40b9 TT |
1517 | static int nfs4_validate_mount_data(void *options, |
1518 | struct nfs_parsed_mount_data *args, | |
1519 | const char *dev_name) | |
f0768ebd | 1520 | { |
91ea40b9 | 1521 | struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; |
f0768ebd CL |
1522 | char *c; |
1523 | ||
1524 | if (data == NULL) | |
1525 | goto out_no_data; | |
1526 | ||
91ea40b9 TT |
1527 | memset(args, 0, sizeof(*args)); |
1528 | args->rsize = NFS_MAX_FILE_IO_SIZE; | |
1529 | args->wsize = NFS_MAX_FILE_IO_SIZE; | |
1530 | args->timeo = 600; | |
1531 | args->retrans = 2; | |
1532 | args->acregmin = 3; | |
1533 | args->acregmax = 60; | |
1534 | args->acdirmin = 30; | |
1535 | args->acdirmax = 60; | |
1536 | args->nfs_server.protocol = IPPROTO_TCP; | |
1537 | ||
f0768ebd CL |
1538 | switch (data->version) { |
1539 | case 1: | |
91ea40b9 | 1540 | if (data->host_addrlen != sizeof(args->nfs_server.address)) |
f0768ebd | 1541 | goto out_no_address; |
91ea40b9 TT |
1542 | if (copy_from_user(&args->nfs_server.address, |
1543 | data->host_addr, | |
20c71f5e | 1544 | sizeof(args->nfs_server.address))) |
f0768ebd | 1545 | return -EFAULT; |
91ea40b9 TT |
1546 | if (args->nfs_server.address.sin_port == 0) |
1547 | args->nfs_server.address.sin_port = htons(NFS_PORT); | |
1548 | if (!nfs_verify_server_address((struct sockaddr *) | |
1549 | &args->nfs_server.address)) | |
f0768ebd CL |
1550 | goto out_no_address; |
1551 | ||
1552 | switch (data->auth_flavourlen) { | |
1553 | case 0: | |
91ea40b9 | 1554 | args->auth_flavors[0] = RPC_AUTH_UNIX; |
f0768ebd CL |
1555 | break; |
1556 | case 1: | |
20c71f5e | 1557 | if (copy_from_user(&args->auth_flavors[0], |
91ea40b9 | 1558 | data->auth_flavours, |
20c71f5e | 1559 | sizeof(args->auth_flavors[0]))) |
f0768ebd CL |
1560 | return -EFAULT; |
1561 | break; | |
1562 | default: | |
1563 | goto out_inval_auth; | |
1564 | } | |
1565 | ||
1566 | c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); | |
1567 | if (IS_ERR(c)) | |
1568 | return PTR_ERR(c); | |
91ea40b9 | 1569 | args->nfs_server.hostname = c; |
f0768ebd CL |
1570 | |
1571 | c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); | |
1572 | if (IS_ERR(c)) | |
1573 | return PTR_ERR(c); | |
91ea40b9 TT |
1574 | args->nfs_server.export_path = c; |
1575 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); | |
f0768ebd CL |
1576 | |
1577 | c = strndup_user(data->client_addr.data, 16); | |
1578 | if (IS_ERR(c)) | |
1579 | return PTR_ERR(c); | |
91ea40b9 TT |
1580 | args->client_address = c; |
1581 | ||
1582 | /* | |
1583 | * Translate to nfs_parsed_mount_data, which nfs4_fill_super | |
1584 | * can deal with. | |
1585 | */ | |
1586 | ||
1587 | args->flags = data->flags & NFS4_MOUNT_FLAGMASK; | |
1588 | args->rsize = data->rsize; | |
1589 | args->wsize = data->wsize; | |
1590 | args->timeo = data->timeo; | |
1591 | args->retrans = data->retrans; | |
1592 | args->acregmin = data->acregmin; | |
1593 | args->acregmax = data->acregmax; | |
1594 | args->acdirmin = data->acdirmin; | |
1595 | args->acdirmax = data->acdirmax; | |
1596 | args->nfs_server.protocol = data->proto; | |
f0768ebd CL |
1597 | |
1598 | break; | |
80071225 CL |
1599 | default: { |
1600 | unsigned int len; | |
91ea40b9 TT |
1601 | |
1602 | if (nfs_parse_mount_options((char *)options, args) == 0) | |
80071225 CL |
1603 | return -EINVAL; |
1604 | ||
1605 | if (!nfs_verify_server_address((struct sockaddr *) | |
91ea40b9 | 1606 | &args->nfs_server.address)) |
80071225 | 1607 | return -EINVAL; |
80071225 | 1608 | |
91ea40b9 | 1609 | switch (args->auth_flavor_len) { |
80071225 | 1610 | case 0: |
91ea40b9 | 1611 | args->auth_flavors[0] = RPC_AUTH_UNIX; |
80071225 CL |
1612 | break; |
1613 | case 1: | |
80071225 CL |
1614 | break; |
1615 | default: | |
1616 | goto out_inval_auth; | |
1617 | } | |
1618 | ||
80071225 CL |
1619 | /* |
1620 | * Split "dev_name" into "hostname:mntpath". | |
1621 | */ | |
1622 | c = strchr(dev_name, ':'); | |
1623 | if (c == NULL) | |
1624 | return -EINVAL; | |
1625 | /* while calculating len, pretend ':' is '\0' */ | |
1626 | len = c - dev_name; | |
1627 | if (len > NFS4_MAXNAMLEN) | |
7d1cca72 | 1628 | return -ENAMETOOLONG; |
91ea40b9 TT |
1629 | args->nfs_server.hostname = kzalloc(len, GFP_KERNEL); |
1630 | if (args->nfs_server.hostname == NULL) | |
80071225 | 1631 | return -ENOMEM; |
91ea40b9 | 1632 | strncpy(args->nfs_server.hostname, dev_name, len - 1); |
80071225 CL |
1633 | |
1634 | c++; /* step over the ':' */ | |
1635 | len = strlen(c); | |
1636 | if (len > NFS4_MAXPATHLEN) | |
7d1cca72 | 1637 | return -ENAMETOOLONG; |
91ea40b9 TT |
1638 | args->nfs_server.export_path = kzalloc(len + 1, GFP_KERNEL); |
1639 | if (args->nfs_server.export_path == NULL) | |
80071225 | 1640 | return -ENOMEM; |
91ea40b9 | 1641 | strncpy(args->nfs_server.export_path, c, len); |
80071225 | 1642 | |
91ea40b9 | 1643 | dprintk("MNTPATH: %s\n", args->nfs_server.export_path); |
80071225 | 1644 | |
91ea40b9 | 1645 | if (args->client_address == NULL) |
0a87cf12 JL |
1646 | goto out_no_client_address; |
1647 | ||
80071225 CL |
1648 | break; |
1649 | } | |
f0768ebd CL |
1650 | } |
1651 | ||
1652 | return 0; | |
1653 | ||
1654 | out_no_data: | |
1655 | dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); | |
1656 | return -EINVAL; | |
1657 | ||
1658 | out_inval_auth: | |
1659 | dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", | |
1660 | data->auth_flavourlen); | |
1661 | return -EINVAL; | |
1662 | ||
1663 | out_no_address: | |
1664 | dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); | |
1665 | return -EINVAL; | |
0a87cf12 JL |
1666 | |
1667 | out_no_client_address: | |
1668 | dfprintk(MOUNT, "NFS4: mount program didn't pass callback address\n"); | |
1669 | return -EINVAL; | |
f0768ebd CL |
1670 | } |
1671 | ||
54ceac45 DH |
1672 | /* |
1673 | * Get the superblock for an NFS4 mountpoint | |
1674 | */ | |
816724e6 TM |
1675 | static int nfs4_get_sb(struct file_system_type *fs_type, |
1676 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
f7b422b1 | 1677 | { |
91ea40b9 | 1678 | struct nfs_parsed_mount_data data; |
54ceac45 DH |
1679 | struct super_block *s; |
1680 | struct nfs_server *server; | |
54ceac45 DH |
1681 | struct nfs_fh mntfh; |
1682 | struct dentry *mntroot; | |
75180df2 | 1683 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1684 | struct nfs_sb_mountdata sb_mntdata = { |
1685 | .mntflags = flags, | |
1686 | }; | |
54ceac45 | 1687 | int error; |
f7b422b1 | 1688 | |
f0768ebd | 1689 | /* Validate the mount data */ |
91ea40b9 | 1690 | error = nfs4_validate_mount_data(raw_data, &data, dev_name); |
f0768ebd CL |
1691 | if (error < 0) |
1692 | goto out; | |
f7b422b1 | 1693 | |
54ceac45 | 1694 | /* Get a volume representation */ |
91ea40b9 | 1695 | server = nfs4_create_server(&data, &mntfh); |
54ceac45 DH |
1696 | if (IS_ERR(server)) { |
1697 | error = PTR_ERR(server); | |
29eb981a | 1698 | goto out; |
f7b422b1 | 1699 | } |
e89a5a43 | 1700 | sb_mntdata.server = server; |
f7b422b1 | 1701 | |
75180df2 TM |
1702 | if (server->flags & NFS4_MOUNT_UNSHARED) |
1703 | compare_super = NULL; | |
1704 | ||
54ceac45 | 1705 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1706 | s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
1707 | if (IS_ERR(s)) { |
1708 | error = PTR_ERR(s); | |
f7b422b1 | 1709 | goto out_free; |
816724e6 TM |
1710 | } |
1711 | ||
5dd3177a TM |
1712 | if (s->s_fs_info != server) { |
1713 | nfs_free_server(server); | |
1714 | server = NULL; | |
1715 | } | |
1716 | ||
54ceac45 DH |
1717 | if (!s->s_root) { |
1718 | /* initial superblock/root creation */ | |
54ceac45 | 1719 | nfs4_fill_super(s); |
54ceac45 | 1720 | } |
f7b422b1 | 1721 | |
54ceac45 DH |
1722 | mntroot = nfs4_get_root(s, &mntfh); |
1723 | if (IS_ERR(mntroot)) { | |
1724 | error = PTR_ERR(mntroot); | |
1725 | goto error_splat_super; | |
f7b422b1 | 1726 | } |
54ceac45 | 1727 | |
f7b422b1 | 1728 | s->s_flags |= MS_ACTIVE; |
54ceac45 DH |
1729 | mnt->mnt_sb = s; |
1730 | mnt->mnt_root = mntroot; | |
29eb981a CL |
1731 | error = 0; |
1732 | ||
1733 | out: | |
91ea40b9 TT |
1734 | kfree(data.client_address); |
1735 | kfree(data.nfs_server.export_path); | |
1736 | kfree(data.nfs_server.hostname); | |
29eb981a | 1737 | return error; |
54ceac45 | 1738 | |
f7b422b1 | 1739 | out_free: |
54ceac45 | 1740 | nfs_free_server(server); |
29eb981a | 1741 | goto out; |
54ceac45 DH |
1742 | |
1743 | error_splat_super: | |
1744 | up_write(&s->s_umount); | |
1745 | deactivate_super(s); | |
29eb981a | 1746 | goto out; |
f7b422b1 DH |
1747 | } |
1748 | ||
1749 | static void nfs4_kill_super(struct super_block *sb) | |
1750 | { | |
1751 | struct nfs_server *server = NFS_SB(sb); | |
1752 | ||
1753 | nfs_return_all_delegations(sb); | |
1754 | kill_anon_super(sb); | |
1755 | ||
1756 | nfs4_renewd_prepare_shutdown(server); | |
54ceac45 | 1757 | nfs_free_server(server); |
f7b422b1 DH |
1758 | } |
1759 | ||
1760 | /* | |
54ceac45 | 1761 | * Clone an NFS4 server record on xdev traversal (FSID-change) |
f7b422b1 | 1762 | */ |
54ceac45 DH |
1763 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags, |
1764 | const char *dev_name, void *raw_data, | |
1765 | struct vfsmount *mnt) | |
f7b422b1 | 1766 | { |
54ceac45 DH |
1767 | struct nfs_clone_mount *data = raw_data; |
1768 | struct super_block *s; | |
1769 | struct nfs_server *server; | |
1770 | struct dentry *mntroot; | |
75180df2 | 1771 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1772 | struct nfs_sb_mountdata sb_mntdata = { |
1773 | .mntflags = flags, | |
1774 | }; | |
54ceac45 | 1775 | int error; |
f7b422b1 | 1776 | |
54ceac45 | 1777 | dprintk("--> nfs4_xdev_get_sb()\n"); |
f7b422b1 | 1778 | |
54ceac45 DH |
1779 | /* create a new volume representation */ |
1780 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
1781 | if (IS_ERR(server)) { | |
1782 | error = PTR_ERR(server); | |
1783 | goto out_err_noserver; | |
f7b422b1 | 1784 | } |
e89a5a43 | 1785 | sb_mntdata.server = server; |
f7b422b1 | 1786 | |
75180df2 TM |
1787 | if (server->flags & NFS4_MOUNT_UNSHARED) |
1788 | compare_super = NULL; | |
1789 | ||
54ceac45 | 1790 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1791 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
1792 | if (IS_ERR(s)) { |
1793 | error = PTR_ERR(s); | |
1794 | goto out_err_nosb; | |
f7b422b1 | 1795 | } |
f7b422b1 | 1796 | |
54ceac45 DH |
1797 | if (s->s_fs_info != server) { |
1798 | nfs_free_server(server); | |
1799 | server = NULL; | |
1800 | } | |
f7b422b1 | 1801 | |
54ceac45 DH |
1802 | if (!s->s_root) { |
1803 | /* initial superblock/root creation */ | |
54ceac45 DH |
1804 | nfs4_clone_super(s, data->sb); |
1805 | } | |
f7b422b1 | 1806 | |
54ceac45 DH |
1807 | mntroot = nfs4_get_root(s, data->fh); |
1808 | if (IS_ERR(mntroot)) { | |
1809 | error = PTR_ERR(mntroot); | |
1810 | goto error_splat_super; | |
1811 | } | |
f7b422b1 | 1812 | |
54ceac45 DH |
1813 | s->s_flags |= MS_ACTIVE; |
1814 | mnt->mnt_sb = s; | |
1815 | mnt->mnt_root = mntroot; | |
1816 | ||
1817 | dprintk("<-- nfs4_xdev_get_sb() = 0\n"); | |
1818 | return 0; | |
1819 | ||
1820 | out_err_nosb: | |
1821 | nfs_free_server(server); | |
1822 | out_err_noserver: | |
1823 | dprintk("<-- nfs4_xdev_get_sb() = %d [error]\n", error); | |
1824 | return error; | |
1825 | ||
1826 | error_splat_super: | |
1827 | up_write(&s->s_umount); | |
1828 | deactivate_super(s); | |
1829 | dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error); | |
1830 | return error; | |
f7b422b1 DH |
1831 | } |
1832 | ||
54ceac45 DH |
1833 | /* |
1834 | * Create an NFS4 server record on referral traversal | |
1835 | */ | |
1836 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, int flags, | |
1837 | const char *dev_name, void *raw_data, | |
1838 | struct vfsmount *mnt) | |
f7b422b1 DH |
1839 | { |
1840 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
1841 | struct super_block *s; |
1842 | struct nfs_server *server; | |
1843 | struct dentry *mntroot; | |
1844 | struct nfs_fh mntfh; | |
75180df2 | 1845 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1846 | struct nfs_sb_mountdata sb_mntdata = { |
1847 | .mntflags = flags, | |
1848 | }; | |
54ceac45 DH |
1849 | int error; |
1850 | ||
1851 | dprintk("--> nfs4_referral_get_sb()\n"); | |
1852 | ||
1853 | /* create a new volume representation */ | |
1854 | server = nfs4_create_referral_server(data, &mntfh); | |
1855 | if (IS_ERR(server)) { | |
1856 | error = PTR_ERR(server); | |
1857 | goto out_err_noserver; | |
1858 | } | |
e89a5a43 | 1859 | sb_mntdata.server = server; |
54ceac45 | 1860 | |
75180df2 TM |
1861 | if (server->flags & NFS4_MOUNT_UNSHARED) |
1862 | compare_super = NULL; | |
1863 | ||
54ceac45 | 1864 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1865 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
1866 | if (IS_ERR(s)) { |
1867 | error = PTR_ERR(s); | |
1868 | goto out_err_nosb; | |
1869 | } | |
1870 | ||
1871 | if (s->s_fs_info != server) { | |
1872 | nfs_free_server(server); | |
1873 | server = NULL; | |
1874 | } | |
1875 | ||
1876 | if (!s->s_root) { | |
1877 | /* initial superblock/root creation */ | |
54ceac45 DH |
1878 | nfs4_fill_super(s); |
1879 | } | |
1880 | ||
f2d0d85e | 1881 | mntroot = nfs4_get_root(s, &mntfh); |
54ceac45 DH |
1882 | if (IS_ERR(mntroot)) { |
1883 | error = PTR_ERR(mntroot); | |
1884 | goto error_splat_super; | |
1885 | } | |
1886 | ||
1887 | s->s_flags |= MS_ACTIVE; | |
1888 | mnt->mnt_sb = s; | |
1889 | mnt->mnt_root = mntroot; | |
1890 | ||
1891 | dprintk("<-- nfs4_referral_get_sb() = 0\n"); | |
1892 | return 0; | |
1893 | ||
1894 | out_err_nosb: | |
1895 | nfs_free_server(server); | |
1896 | out_err_noserver: | |
1897 | dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error); | |
1898 | return error; | |
1899 | ||
1900 | error_splat_super: | |
1901 | up_write(&s->s_umount); | |
1902 | deactivate_super(s); | |
1903 | dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error); | |
1904 | return error; | |
f7b422b1 DH |
1905 | } |
1906 | ||
54ceac45 | 1907 | #endif /* CONFIG_NFS_V4 */ |