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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 | |
62 | struct nfs_parsed_mount_data { | |
63 | int flags; | |
64 | int rsize, wsize; | |
65 | int timeo, retrans; | |
66 | int acregmin, acregmax, | |
67 | acdirmin, acdirmax; | |
68 | int namlen; | |
69 | unsigned int bsize; | |
70 | unsigned int auth_flavor_len; | |
71 | rpc_authflavor_t auth_flavors[1]; | |
72 | char *client_address; | |
73 | ||
74 | struct { | |
75 | struct sockaddr_in address; | |
76 | unsigned int program; | |
77 | unsigned int version; | |
78 | unsigned short port; | |
79 | int protocol; | |
80 | } mount_server; | |
81 | ||
82 | struct { | |
83 | struct sockaddr_in address; | |
84 | char *hostname; | |
85 | char *export_path; | |
86 | unsigned int program; | |
87 | int protocol; | |
88 | } nfs_server; | |
89 | }; | |
90 | ||
91 | enum { | |
92 | /* Mount options that take no arguments */ | |
93 | Opt_soft, Opt_hard, | |
94 | Opt_intr, Opt_nointr, | |
95 | Opt_posix, Opt_noposix, | |
96 | Opt_cto, Opt_nocto, | |
97 | Opt_ac, Opt_noac, | |
98 | Opt_lock, Opt_nolock, | |
99 | Opt_v2, Opt_v3, | |
100 | Opt_udp, Opt_tcp, | |
101 | Opt_acl, Opt_noacl, | |
102 | Opt_rdirplus, Opt_nordirplus, | |
75180df2 | 103 | Opt_sharecache, Opt_nosharecache, |
bf0fd768 CL |
104 | |
105 | /* Mount options that take integer arguments */ | |
106 | Opt_port, | |
107 | Opt_rsize, Opt_wsize, Opt_bsize, | |
108 | Opt_timeo, Opt_retrans, | |
109 | Opt_acregmin, Opt_acregmax, | |
110 | Opt_acdirmin, Opt_acdirmax, | |
111 | Opt_actimeo, | |
112 | Opt_namelen, | |
113 | Opt_mountport, | |
114 | Opt_mountprog, Opt_mountvers, | |
115 | Opt_nfsprog, Opt_nfsvers, | |
116 | ||
117 | /* Mount options that take string arguments */ | |
118 | Opt_sec, Opt_proto, Opt_mountproto, | |
119 | Opt_addr, Opt_mounthost, Opt_clientaddr, | |
120 | ||
121 | /* Mount options that are ignored */ | |
122 | Opt_userspace, Opt_deprecated, | |
123 | ||
124 | Opt_err | |
125 | }; | |
126 | ||
127 | static match_table_t nfs_mount_option_tokens = { | |
128 | { Opt_userspace, "bg" }, | |
129 | { Opt_userspace, "fg" }, | |
130 | { Opt_soft, "soft" }, | |
131 | { Opt_hard, "hard" }, | |
132 | { Opt_intr, "intr" }, | |
133 | { Opt_nointr, "nointr" }, | |
134 | { Opt_posix, "posix" }, | |
135 | { Opt_noposix, "noposix" }, | |
136 | { Opt_cto, "cto" }, | |
137 | { Opt_nocto, "nocto" }, | |
138 | { Opt_ac, "ac" }, | |
139 | { Opt_noac, "noac" }, | |
140 | { Opt_lock, "lock" }, | |
141 | { Opt_nolock, "nolock" }, | |
142 | { Opt_v2, "v2" }, | |
143 | { Opt_v3, "v3" }, | |
144 | { Opt_udp, "udp" }, | |
145 | { Opt_tcp, "tcp" }, | |
146 | { Opt_acl, "acl" }, | |
147 | { Opt_noacl, "noacl" }, | |
148 | { Opt_rdirplus, "rdirplus" }, | |
149 | { Opt_nordirplus, "nordirplus" }, | |
75180df2 TM |
150 | { Opt_sharecache, "sharecache" }, |
151 | { Opt_nosharecache, "nosharecache" }, | |
bf0fd768 CL |
152 | |
153 | { Opt_port, "port=%u" }, | |
154 | { Opt_rsize, "rsize=%u" }, | |
155 | { Opt_wsize, "wsize=%u" }, | |
156 | { Opt_bsize, "bsize=%u" }, | |
157 | { Opt_timeo, "timeo=%u" }, | |
158 | { Opt_retrans, "retrans=%u" }, | |
159 | { Opt_acregmin, "acregmin=%u" }, | |
160 | { Opt_acregmax, "acregmax=%u" }, | |
161 | { Opt_acdirmin, "acdirmin=%u" }, | |
162 | { Opt_acdirmax, "acdirmax=%u" }, | |
163 | { Opt_actimeo, "actimeo=%u" }, | |
164 | { Opt_userspace, "retry=%u" }, | |
165 | { Opt_namelen, "namlen=%u" }, | |
166 | { Opt_mountport, "mountport=%u" }, | |
167 | { Opt_mountprog, "mountprog=%u" }, | |
168 | { Opt_mountvers, "mountvers=%u" }, | |
169 | { Opt_nfsprog, "nfsprog=%u" }, | |
170 | { Opt_nfsvers, "nfsvers=%u" }, | |
171 | { Opt_nfsvers, "vers=%u" }, | |
172 | ||
173 | { Opt_sec, "sec=%s" }, | |
174 | { Opt_proto, "proto=%s" }, | |
175 | { Opt_mountproto, "mountproto=%s" }, | |
176 | { Opt_addr, "addr=%s" }, | |
177 | { Opt_clientaddr, "clientaddr=%s" }, | |
178 | { Opt_mounthost, "mounthost=%s" }, | |
179 | ||
180 | { Opt_err, NULL } | |
181 | }; | |
182 | ||
183 | enum { | |
184 | Opt_xprt_udp, Opt_xprt_tcp, | |
185 | ||
186 | Opt_xprt_err | |
187 | }; | |
188 | ||
189 | static match_table_t nfs_xprt_protocol_tokens = { | |
190 | { Opt_xprt_udp, "udp" }, | |
191 | { Opt_xprt_tcp, "tcp" }, | |
192 | ||
193 | { Opt_xprt_err, NULL } | |
194 | }; | |
195 | ||
196 | enum { | |
197 | Opt_sec_none, Opt_sec_sys, | |
198 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
199 | Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, | |
200 | Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, | |
201 | ||
202 | Opt_sec_err | |
203 | }; | |
204 | ||
205 | static match_table_t nfs_secflavor_tokens = { | |
206 | { Opt_sec_none, "none" }, | |
207 | { Opt_sec_none, "null" }, | |
208 | { Opt_sec_sys, "sys" }, | |
209 | ||
210 | { Opt_sec_krb5, "krb5" }, | |
211 | { Opt_sec_krb5i, "krb5i" }, | |
212 | { Opt_sec_krb5p, "krb5p" }, | |
213 | ||
214 | { Opt_sec_lkey, "lkey" }, | |
215 | { Opt_sec_lkeyi, "lkeyi" }, | |
216 | { Opt_sec_lkeyp, "lkeyp" }, | |
217 | ||
218 | { Opt_sec_err, NULL } | |
219 | }; | |
220 | ||
221 | ||
f7b422b1 | 222 | static void nfs_umount_begin(struct vfsmount *, int); |
816724e6 | 223 | static int nfs_statfs(struct dentry *, struct kstatfs *); |
f7b422b1 DH |
224 | static int nfs_show_options(struct seq_file *, struct vfsmount *); |
225 | static int nfs_show_stats(struct seq_file *, struct vfsmount *); | |
816724e6 | 226 | static int nfs_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *); |
54ceac45 | 227 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, |
816724e6 | 228 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); |
f7b422b1 DH |
229 | static void nfs_kill_super(struct super_block *); |
230 | ||
231 | static struct file_system_type nfs_fs_type = { | |
232 | .owner = THIS_MODULE, | |
233 | .name = "nfs", | |
234 | .get_sb = nfs_get_sb, | |
235 | .kill_sb = nfs_kill_super, | |
349457cc | 236 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
237 | }; |
238 | ||
54ceac45 | 239 | struct file_system_type nfs_xdev_fs_type = { |
f7b422b1 DH |
240 | .owner = THIS_MODULE, |
241 | .name = "nfs", | |
54ceac45 | 242 | .get_sb = nfs_xdev_get_sb, |
f7b422b1 | 243 | .kill_sb = nfs_kill_super, |
349457cc | 244 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
245 | }; |
246 | ||
ee9b6d61 | 247 | static const struct super_operations nfs_sops = { |
f7b422b1 DH |
248 | .alloc_inode = nfs_alloc_inode, |
249 | .destroy_inode = nfs_destroy_inode, | |
250 | .write_inode = nfs_write_inode, | |
251 | .statfs = nfs_statfs, | |
252 | .clear_inode = nfs_clear_inode, | |
253 | .umount_begin = nfs_umount_begin, | |
254 | .show_options = nfs_show_options, | |
255 | .show_stats = nfs_show_stats, | |
256 | }; | |
257 | ||
258 | #ifdef CONFIG_NFS_V4 | |
816724e6 TM |
259 | static int nfs4_get_sb(struct file_system_type *fs_type, |
260 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
54ceac45 DH |
261 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, |
262 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
263 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, | |
264 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
f7b422b1 DH |
265 | static void nfs4_kill_super(struct super_block *sb); |
266 | ||
267 | static struct file_system_type nfs4_fs_type = { | |
268 | .owner = THIS_MODULE, | |
269 | .name = "nfs4", | |
270 | .get_sb = nfs4_get_sb, | |
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 | ||
54ceac45 | 275 | struct file_system_type nfs4_xdev_fs_type = { |
f7b422b1 DH |
276 | .owner = THIS_MODULE, |
277 | .name = "nfs4", | |
54ceac45 | 278 | .get_sb = nfs4_xdev_get_sb, |
f7b422b1 | 279 | .kill_sb = nfs4_kill_super, |
349457cc | 280 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
281 | }; |
282 | ||
54ceac45 | 283 | struct file_system_type nfs4_referral_fs_type = { |
f7b422b1 DH |
284 | .owner = THIS_MODULE, |
285 | .name = "nfs4", | |
54ceac45 | 286 | .get_sb = nfs4_referral_get_sb, |
f7b422b1 | 287 | .kill_sb = nfs4_kill_super, |
349457cc | 288 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
289 | }; |
290 | ||
ee9b6d61 | 291 | static const struct super_operations nfs4_sops = { |
f7b422b1 DH |
292 | .alloc_inode = nfs_alloc_inode, |
293 | .destroy_inode = nfs_destroy_inode, | |
294 | .write_inode = nfs_write_inode, | |
295 | .statfs = nfs_statfs, | |
296 | .clear_inode = nfs4_clear_inode, | |
297 | .umount_begin = nfs_umount_begin, | |
298 | .show_options = nfs_show_options, | |
299 | .show_stats = nfs_show_stats, | |
300 | }; | |
301 | #endif | |
302 | ||
8e1f936b RR |
303 | static struct shrinker acl_shrinker = { |
304 | .shrink = nfs_access_cache_shrinker, | |
305 | .seeks = DEFAULT_SEEKS, | |
306 | }; | |
979df72e | 307 | |
f7b422b1 DH |
308 | /* |
309 | * Register the NFS filesystems | |
310 | */ | |
311 | int __init register_nfs_fs(void) | |
312 | { | |
313 | int ret; | |
314 | ||
315 | ret = register_filesystem(&nfs_fs_type); | |
316 | if (ret < 0) | |
317 | goto error_0; | |
318 | ||
f7b422b1 DH |
319 | ret = nfs_register_sysctl(); |
320 | if (ret < 0) | |
321 | goto error_1; | |
89a09141 | 322 | #ifdef CONFIG_NFS_V4 |
f7b422b1 DH |
323 | ret = register_filesystem(&nfs4_fs_type); |
324 | if (ret < 0) | |
325 | goto error_2; | |
326 | #endif | |
8e1f936b | 327 | register_shrinker(&acl_shrinker); |
f7b422b1 DH |
328 | return 0; |
329 | ||
330 | #ifdef CONFIG_NFS_V4 | |
331 | error_2: | |
332 | nfs_unregister_sysctl(); | |
89a09141 | 333 | #endif |
f7b422b1 DH |
334 | error_1: |
335 | unregister_filesystem(&nfs_fs_type); | |
f7b422b1 DH |
336 | error_0: |
337 | return ret; | |
338 | } | |
339 | ||
340 | /* | |
341 | * Unregister the NFS filesystems | |
342 | */ | |
343 | void __exit unregister_nfs_fs(void) | |
344 | { | |
8e1f936b | 345 | unregister_shrinker(&acl_shrinker); |
f7b422b1 DH |
346 | #ifdef CONFIG_NFS_V4 |
347 | unregister_filesystem(&nfs4_fs_type); | |
348 | nfs_unregister_sysctl(); | |
349 | #endif | |
350 | unregister_filesystem(&nfs_fs_type); | |
351 | } | |
352 | ||
353 | /* | |
354 | * Deliver file system statistics to userspace | |
355 | */ | |
816724e6 | 356 | static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
f7b422b1 | 357 | { |
0c7d90cf | 358 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
f7b422b1 DH |
359 | unsigned char blockbits; |
360 | unsigned long blockres; | |
0c7d90cf | 361 | struct nfs_fh *fh = NFS_FH(dentry->d_inode); |
f7b422b1 DH |
362 | struct nfs_fattr fattr; |
363 | struct nfs_fsstat res = { | |
364 | .fattr = &fattr, | |
365 | }; | |
366 | int error; | |
367 | ||
368 | lock_kernel(); | |
369 | ||
8fa5c000 | 370 | error = server->nfs_client->rpc_ops->statfs(server, fh, &res); |
f7b422b1 DH |
371 | if (error < 0) |
372 | goto out_err; | |
1a0ba9ae | 373 | buf->f_type = NFS_SUPER_MAGIC; |
f7b422b1 DH |
374 | |
375 | /* | |
376 | * Current versions of glibc do not correctly handle the | |
377 | * case where f_frsize != f_bsize. Eventually we want to | |
378 | * report the value of wtmult in this field. | |
379 | */ | |
0c7d90cf | 380 | buf->f_frsize = dentry->d_sb->s_blocksize; |
f7b422b1 DH |
381 | |
382 | /* | |
383 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
384 | * are reported in units of f_frsize. Linux hasn't had | |
385 | * an f_frsize field in its statfs struct until recently, | |
386 | * thus historically Linux's sys_statfs reports these | |
387 | * fields in units of f_bsize. | |
388 | */ | |
0c7d90cf DH |
389 | buf->f_bsize = dentry->d_sb->s_blocksize; |
390 | blockbits = dentry->d_sb->s_blocksize_bits; | |
f7b422b1 DH |
391 | blockres = (1 << blockbits) - 1; |
392 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
393 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
394 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
395 | ||
396 | buf->f_files = res.tfiles; | |
397 | buf->f_ffree = res.afiles; | |
398 | ||
399 | buf->f_namelen = server->namelen; | |
1a0ba9ae | 400 | |
f7b422b1 DH |
401 | unlock_kernel(); |
402 | return 0; | |
403 | ||
404 | out_err: | |
405 | dprintk("%s: statfs error = %d\n", __FUNCTION__, -error); | |
1a0ba9ae AA |
406 | unlock_kernel(); |
407 | return error; | |
f7b422b1 DH |
408 | } |
409 | ||
7d4e2747 DH |
410 | /* |
411 | * Map the security flavour number to a name | |
412 | */ | |
81039f1f TM |
413 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
414 | { | |
7d4e2747 | 415 | static const struct { |
81039f1f TM |
416 | rpc_authflavor_t flavour; |
417 | const char *str; | |
418 | } sec_flavours[] = { | |
419 | { RPC_AUTH_NULL, "null" }, | |
420 | { RPC_AUTH_UNIX, "sys" }, | |
421 | { RPC_AUTH_GSS_KRB5, "krb5" }, | |
422 | { RPC_AUTH_GSS_KRB5I, "krb5i" }, | |
423 | { RPC_AUTH_GSS_KRB5P, "krb5p" }, | |
424 | { RPC_AUTH_GSS_LKEY, "lkey" }, | |
425 | { RPC_AUTH_GSS_LKEYI, "lkeyi" }, | |
426 | { RPC_AUTH_GSS_LKEYP, "lkeyp" }, | |
427 | { RPC_AUTH_GSS_SPKM, "spkm" }, | |
428 | { RPC_AUTH_GSS_SPKMI, "spkmi" }, | |
429 | { RPC_AUTH_GSS_SPKMP, "spkmp" }, | |
4d81cd16 | 430 | { UINT_MAX, "unknown" } |
81039f1f TM |
431 | }; |
432 | int i; | |
433 | ||
4d81cd16 | 434 | for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) { |
81039f1f TM |
435 | if (sec_flavours[i].flavour == flavour) |
436 | break; | |
437 | } | |
438 | return sec_flavours[i].str; | |
439 | } | |
440 | ||
f7b422b1 DH |
441 | /* |
442 | * Describe the mount options in force on this server representation | |
443 | */ | |
444 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults) | |
445 | { | |
509de811 | 446 | static const struct proc_nfs_info { |
f7b422b1 | 447 | int flag; |
509de811 DH |
448 | const char *str; |
449 | const char *nostr; | |
f7b422b1 DH |
450 | } nfs_info[] = { |
451 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, | |
452 | { NFS_MOUNT_INTR, ",intr", "" }, | |
453 | { NFS_MOUNT_NOCTO, ",nocto", "" }, | |
454 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
455 | { NFS_MOUNT_NONLM, ",nolock", "" }, | |
456 | { NFS_MOUNT_NOACL, ",noacl", "" }, | |
74dd34e6 | 457 | { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" }, |
75180df2 | 458 | { NFS_MOUNT_UNSHARED, ",nosharecache", ""}, |
f7b422b1 DH |
459 | { 0, NULL, NULL } |
460 | }; | |
509de811 | 461 | const struct proc_nfs_info *nfs_infop; |
8fa5c000 | 462 | struct nfs_client *clp = nfss->nfs_client; |
f7b422b1 | 463 | char buf[12]; |
509de811 | 464 | const char *proto; |
f7b422b1 | 465 | |
8fa5c000 | 466 | seq_printf(m, ",vers=%d", clp->rpc_ops->version); |
f7b422b1 DH |
467 | seq_printf(m, ",rsize=%d", nfss->rsize); |
468 | seq_printf(m, ",wsize=%d", nfss->wsize); | |
469 | if (nfss->acregmin != 3*HZ || showdefaults) | |
470 | seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ); | |
471 | if (nfss->acregmax != 60*HZ || showdefaults) | |
472 | seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ); | |
473 | if (nfss->acdirmin != 30*HZ || showdefaults) | |
474 | seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ); | |
475 | if (nfss->acdirmax != 60*HZ || showdefaults) | |
476 | seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ); | |
477 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { | |
478 | if (nfss->flags & nfs_infop->flag) | |
479 | seq_puts(m, nfs_infop->str); | |
480 | else | |
481 | seq_puts(m, nfs_infop->nostr); | |
482 | } | |
483 | switch (nfss->client->cl_xprt->prot) { | |
484 | case IPPROTO_TCP: | |
485 | proto = "tcp"; | |
486 | break; | |
487 | case IPPROTO_UDP: | |
488 | proto = "udp"; | |
489 | break; | |
490 | default: | |
491 | snprintf(buf, sizeof(buf), "%u", nfss->client->cl_xprt->prot); | |
492 | proto = buf; | |
493 | } | |
494 | seq_printf(m, ",proto=%s", proto); | |
5006a76c DH |
495 | seq_printf(m, ",timeo=%lu", 10U * clp->retrans_timeo / HZ); |
496 | seq_printf(m, ",retrans=%u", clp->retrans_count); | |
81039f1f | 497 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
f7b422b1 DH |
498 | } |
499 | ||
500 | /* | |
501 | * Describe the mount options on this VFS mountpoint | |
502 | */ | |
503 | static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) | |
504 | { | |
505 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
506 | ||
507 | nfs_show_mount_options(m, nfss, 0); | |
508 | ||
509 | seq_puts(m, ",addr="); | |
54ceac45 | 510 | seq_escape(m, nfss->nfs_client->cl_hostname, " \t\n\\"); |
f7b422b1 DH |
511 | |
512 | return 0; | |
513 | } | |
514 | ||
515 | /* | |
516 | * Present statistical information for this VFS mountpoint | |
517 | */ | |
518 | static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) | |
519 | { | |
520 | int i, cpu; | |
521 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
522 | struct rpc_auth *auth = nfss->client->cl_auth; | |
523 | struct nfs_iostats totals = { }; | |
524 | ||
525 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
526 | ||
527 | /* | |
528 | * Display all mount option settings | |
529 | */ | |
530 | seq_printf(m, "\n\topts:\t"); | |
531 | seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw"); | |
532 | seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); | |
533 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : ""); | |
534 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); | |
535 | nfs_show_mount_options(m, nfss, 1); | |
536 | ||
537 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); | |
538 | ||
539 | seq_printf(m, "\n\tcaps:\t"); | |
540 | seq_printf(m, "caps=0x%x", nfss->caps); | |
541 | seq_printf(m, ",wtmult=%d", nfss->wtmult); | |
542 | seq_printf(m, ",dtsize=%d", nfss->dtsize); | |
543 | seq_printf(m, ",bsize=%d", nfss->bsize); | |
544 | seq_printf(m, ",namelen=%d", nfss->namelen); | |
545 | ||
546 | #ifdef CONFIG_NFS_V4 | |
8fa5c000 | 547 | if (nfss->nfs_client->cl_nfsversion == 4) { |
f7b422b1 DH |
548 | seq_printf(m, "\n\tnfsv4:\t"); |
549 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); | |
550 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
551 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); | |
552 | } | |
553 | #endif | |
554 | ||
555 | /* | |
556 | * Display security flavor in effect for this mount | |
557 | */ | |
558 | seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor); | |
559 | if (auth->au_flavor) | |
560 | seq_printf(m, ",pseudoflavor=%d", auth->au_flavor); | |
561 | ||
562 | /* | |
563 | * Display superblock I/O counters | |
564 | */ | |
565 | for_each_possible_cpu(cpu) { | |
566 | struct nfs_iostats *stats; | |
567 | ||
568 | preempt_disable(); | |
569 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
570 | ||
571 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
572 | totals.events[i] += stats->events[i]; | |
573 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
574 | totals.bytes[i] += stats->bytes[i]; | |
575 | ||
576 | preempt_enable(); | |
577 | } | |
578 | ||
579 | seq_printf(m, "\n\tevents:\t"); | |
580 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
581 | seq_printf(m, "%lu ", totals.events[i]); | |
582 | seq_printf(m, "\n\tbytes:\t"); | |
583 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
584 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
585 | seq_printf(m, "\n"); | |
586 | ||
587 | rpc_print_iostats(m, nfss->client); | |
588 | ||
589 | return 0; | |
590 | } | |
591 | ||
592 | /* | |
593 | * Begin unmount by attempting to remove all automounted mountpoints we added | |
54ceac45 | 594 | * in response to xdev traversals and referrals |
f7b422b1 DH |
595 | */ |
596 | static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags) | |
597 | { | |
fc6ae3cf TM |
598 | struct nfs_server *server = NFS_SB(vfsmnt->mnt_sb); |
599 | struct rpc_clnt *rpc; | |
600 | ||
f7b422b1 | 601 | shrink_submounts(vfsmnt, &nfs_automount_list); |
fc6ae3cf TM |
602 | |
603 | if (!(flags & MNT_FORCE)) | |
604 | return; | |
605 | /* -EIO all pending I/O */ | |
606 | rpc = server->client_acl; | |
607 | if (!IS_ERR(rpc)) | |
608 | rpc_killall_tasks(rpc); | |
609 | rpc = server->client; | |
610 | if (!IS_ERR(rpc)) | |
611 | rpc_killall_tasks(rpc); | |
f7b422b1 DH |
612 | } |
613 | ||
fc50d58f CL |
614 | /* |
615 | * Sanity-check a server address provided by the mount command | |
616 | */ | |
617 | static int nfs_verify_server_address(struct sockaddr *addr) | |
618 | { | |
619 | switch (addr->sa_family) { | |
620 | case AF_INET: { | |
621 | struct sockaddr_in *sa = (struct sockaddr_in *) addr; | |
622 | if (sa->sin_addr.s_addr != INADDR_ANY) | |
623 | return 1; | |
624 | break; | |
625 | } | |
626 | } | |
627 | ||
628 | return 0; | |
629 | } | |
630 | ||
bf0fd768 CL |
631 | /* |
632 | * Error-check and convert a string of mount options from user space into | |
633 | * a data structure | |
634 | */ | |
635 | static int nfs_parse_mount_options(char *raw, | |
636 | struct nfs_parsed_mount_data *mnt) | |
637 | { | |
638 | char *p, *string; | |
639 | ||
640 | if (!raw) { | |
641 | dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); | |
642 | return 1; | |
643 | } | |
644 | dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); | |
645 | ||
646 | while ((p = strsep(&raw, ",")) != NULL) { | |
647 | substring_t args[MAX_OPT_ARGS]; | |
648 | int option, token; | |
649 | ||
650 | if (!*p) | |
651 | continue; | |
652 | ||
653 | dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); | |
654 | ||
655 | token = match_token(p, nfs_mount_option_tokens, args); | |
656 | switch (token) { | |
657 | case Opt_soft: | |
658 | mnt->flags |= NFS_MOUNT_SOFT; | |
659 | break; | |
660 | case Opt_hard: | |
661 | mnt->flags &= ~NFS_MOUNT_SOFT; | |
662 | break; | |
663 | case Opt_intr: | |
664 | mnt->flags |= NFS_MOUNT_INTR; | |
665 | break; | |
666 | case Opt_nointr: | |
667 | mnt->flags &= ~NFS_MOUNT_INTR; | |
668 | break; | |
669 | case Opt_posix: | |
670 | mnt->flags |= NFS_MOUNT_POSIX; | |
671 | break; | |
672 | case Opt_noposix: | |
673 | mnt->flags &= ~NFS_MOUNT_POSIX; | |
674 | break; | |
675 | case Opt_cto: | |
676 | mnt->flags &= ~NFS_MOUNT_NOCTO; | |
677 | break; | |
678 | case Opt_nocto: | |
679 | mnt->flags |= NFS_MOUNT_NOCTO; | |
680 | break; | |
681 | case Opt_ac: | |
682 | mnt->flags &= ~NFS_MOUNT_NOAC; | |
683 | break; | |
684 | case Opt_noac: | |
685 | mnt->flags |= NFS_MOUNT_NOAC; | |
686 | break; | |
687 | case Opt_lock: | |
688 | mnt->flags &= ~NFS_MOUNT_NONLM; | |
689 | break; | |
690 | case Opt_nolock: | |
691 | mnt->flags |= NFS_MOUNT_NONLM; | |
692 | break; | |
693 | case Opt_v2: | |
694 | mnt->flags &= ~NFS_MOUNT_VER3; | |
695 | break; | |
696 | case Opt_v3: | |
697 | mnt->flags |= NFS_MOUNT_VER3; | |
698 | break; | |
699 | case Opt_udp: | |
700 | mnt->flags &= ~NFS_MOUNT_TCP; | |
701 | mnt->nfs_server.protocol = IPPROTO_UDP; | |
702 | mnt->timeo = 7; | |
703 | mnt->retrans = 5; | |
704 | break; | |
705 | case Opt_tcp: | |
706 | mnt->flags |= NFS_MOUNT_TCP; | |
707 | mnt->nfs_server.protocol = IPPROTO_TCP; | |
708 | mnt->timeo = 600; | |
709 | mnt->retrans = 2; | |
710 | break; | |
711 | case Opt_acl: | |
712 | mnt->flags &= ~NFS_MOUNT_NOACL; | |
713 | break; | |
714 | case Opt_noacl: | |
715 | mnt->flags |= NFS_MOUNT_NOACL; | |
716 | break; | |
717 | case Opt_rdirplus: | |
718 | mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; | |
719 | break; | |
720 | case Opt_nordirplus: | |
721 | mnt->flags |= NFS_MOUNT_NORDIRPLUS; | |
722 | break; | |
75180df2 TM |
723 | case Opt_sharecache: |
724 | mnt->flags &= ~NFS_MOUNT_UNSHARED; | |
725 | break; | |
726 | case Opt_nosharecache: | |
727 | mnt->flags |= NFS_MOUNT_UNSHARED; | |
728 | break; | |
bf0fd768 CL |
729 | |
730 | case Opt_port: | |
731 | if (match_int(args, &option)) | |
732 | return 0; | |
733 | if (option < 0 || option > 65535) | |
734 | return 0; | |
41089644 | 735 | mnt->nfs_server.address.sin_port = htons(option); |
bf0fd768 CL |
736 | break; |
737 | case Opt_rsize: | |
738 | if (match_int(args, &mnt->rsize)) | |
739 | return 0; | |
740 | break; | |
741 | case Opt_wsize: | |
742 | if (match_int(args, &mnt->wsize)) | |
743 | return 0; | |
744 | break; | |
745 | case Opt_bsize: | |
746 | if (match_int(args, &option)) | |
747 | return 0; | |
748 | if (option < 0) | |
749 | return 0; | |
750 | mnt->bsize = option; | |
751 | break; | |
752 | case Opt_timeo: | |
753 | if (match_int(args, &mnt->timeo)) | |
754 | return 0; | |
755 | break; | |
756 | case Opt_retrans: | |
757 | if (match_int(args, &mnt->retrans)) | |
758 | return 0; | |
759 | break; | |
760 | case Opt_acregmin: | |
761 | if (match_int(args, &mnt->acregmin)) | |
762 | return 0; | |
763 | break; | |
764 | case Opt_acregmax: | |
765 | if (match_int(args, &mnt->acregmax)) | |
766 | return 0; | |
767 | break; | |
768 | case Opt_acdirmin: | |
769 | if (match_int(args, &mnt->acdirmin)) | |
770 | return 0; | |
771 | break; | |
772 | case Opt_acdirmax: | |
773 | if (match_int(args, &mnt->acdirmax)) | |
774 | return 0; | |
775 | break; | |
776 | case Opt_actimeo: | |
777 | if (match_int(args, &option)) | |
778 | return 0; | |
779 | if (option < 0) | |
780 | return 0; | |
781 | mnt->acregmin = | |
782 | mnt->acregmax = | |
783 | mnt->acdirmin = | |
784 | mnt->acdirmax = option; | |
785 | break; | |
786 | case Opt_namelen: | |
787 | if (match_int(args, &mnt->namlen)) | |
788 | return 0; | |
789 | break; | |
790 | case Opt_mountport: | |
791 | if (match_int(args, &option)) | |
792 | return 0; | |
793 | if (option < 0 || option > 65535) | |
794 | return 0; | |
795 | mnt->mount_server.port = option; | |
796 | break; | |
797 | case Opt_mountprog: | |
798 | if (match_int(args, &option)) | |
799 | return 0; | |
800 | if (option < 0) | |
801 | return 0; | |
802 | mnt->mount_server.program = option; | |
803 | break; | |
804 | case Opt_mountvers: | |
805 | if (match_int(args, &option)) | |
806 | return 0; | |
807 | if (option < 0) | |
808 | return 0; | |
809 | mnt->mount_server.version = option; | |
810 | break; | |
811 | case Opt_nfsprog: | |
812 | if (match_int(args, &option)) | |
813 | return 0; | |
814 | if (option < 0) | |
815 | return 0; | |
816 | mnt->nfs_server.program = option; | |
817 | break; | |
818 | case Opt_nfsvers: | |
819 | if (match_int(args, &option)) | |
820 | return 0; | |
821 | switch (option) { | |
822 | case 2: | |
823 | mnt->flags &= ~NFS_MOUNT_VER3; | |
824 | break; | |
825 | case 3: | |
826 | mnt->flags |= NFS_MOUNT_VER3; | |
827 | break; | |
828 | default: | |
829 | goto out_unrec_vers; | |
830 | } | |
831 | break; | |
832 | ||
833 | case Opt_sec: | |
834 | string = match_strdup(args); | |
835 | if (string == NULL) | |
836 | goto out_nomem; | |
837 | token = match_token(string, nfs_secflavor_tokens, args); | |
838 | kfree(string); | |
839 | ||
840 | /* | |
841 | * The flags setting is for v2/v3. The flavor_len | |
842 | * setting is for v4. v2/v3 also need to know the | |
843 | * difference between NULL and UNIX. | |
844 | */ | |
845 | switch (token) { | |
846 | case Opt_sec_none: | |
847 | mnt->flags &= ~NFS_MOUNT_SECFLAVOUR; | |
848 | mnt->auth_flavor_len = 0; | |
849 | mnt->auth_flavors[0] = RPC_AUTH_NULL; | |
850 | break; | |
851 | case Opt_sec_sys: | |
852 | mnt->flags &= ~NFS_MOUNT_SECFLAVOUR; | |
853 | mnt->auth_flavor_len = 0; | |
854 | mnt->auth_flavors[0] = RPC_AUTH_UNIX; | |
855 | break; | |
856 | case Opt_sec_krb5: | |
857 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
858 | mnt->auth_flavor_len = 1; | |
859 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5; | |
860 | break; | |
861 | case Opt_sec_krb5i: | |
862 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
863 | mnt->auth_flavor_len = 1; | |
864 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I; | |
865 | break; | |
866 | case Opt_sec_krb5p: | |
867 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
868 | mnt->auth_flavor_len = 1; | |
869 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P; | |
870 | break; | |
871 | case Opt_sec_lkey: | |
872 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
873 | mnt->auth_flavor_len = 1; | |
874 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY; | |
875 | break; | |
876 | case Opt_sec_lkeyi: | |
877 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
878 | mnt->auth_flavor_len = 1; | |
879 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI; | |
880 | break; | |
881 | case Opt_sec_lkeyp: | |
882 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
883 | mnt->auth_flavor_len = 1; | |
884 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP; | |
885 | break; | |
886 | case Opt_sec_spkm: | |
887 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
888 | mnt->auth_flavor_len = 1; | |
889 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM; | |
890 | break; | |
891 | case Opt_sec_spkmi: | |
892 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
893 | mnt->auth_flavor_len = 1; | |
894 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI; | |
895 | break; | |
896 | case Opt_sec_spkmp: | |
897 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
898 | mnt->auth_flavor_len = 1; | |
899 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP; | |
900 | break; | |
901 | default: | |
902 | goto out_unrec_sec; | |
903 | } | |
904 | break; | |
905 | case Opt_proto: | |
906 | string = match_strdup(args); | |
907 | if (string == NULL) | |
908 | goto out_nomem; | |
909 | token = match_token(string, | |
910 | nfs_xprt_protocol_tokens, args); | |
911 | kfree(string); | |
912 | ||
913 | switch (token) { | |
fdb66ff4 | 914 | case Opt_xprt_udp: |
bf0fd768 CL |
915 | mnt->flags &= ~NFS_MOUNT_TCP; |
916 | mnt->nfs_server.protocol = IPPROTO_UDP; | |
917 | mnt->timeo = 7; | |
918 | mnt->retrans = 5; | |
919 | break; | |
fdb66ff4 | 920 | case Opt_xprt_tcp: |
bf0fd768 CL |
921 | mnt->flags |= NFS_MOUNT_TCP; |
922 | mnt->nfs_server.protocol = IPPROTO_TCP; | |
923 | mnt->timeo = 600; | |
924 | mnt->retrans = 2; | |
925 | break; | |
926 | default: | |
927 | goto out_unrec_xprt; | |
928 | } | |
929 | break; | |
930 | case Opt_mountproto: | |
931 | string = match_strdup(args); | |
932 | if (string == NULL) | |
933 | goto out_nomem; | |
934 | token = match_token(string, | |
935 | nfs_xprt_protocol_tokens, args); | |
936 | kfree(string); | |
937 | ||
938 | switch (token) { | |
fdb66ff4 | 939 | case Opt_xprt_udp: |
bf0fd768 CL |
940 | mnt->mount_server.protocol = IPPROTO_UDP; |
941 | break; | |
fdb66ff4 | 942 | case Opt_xprt_tcp: |
bf0fd768 CL |
943 | mnt->mount_server.protocol = IPPROTO_TCP; |
944 | break; | |
945 | default: | |
946 | goto out_unrec_xprt; | |
947 | } | |
948 | break; | |
949 | case Opt_addr: | |
950 | string = match_strdup(args); | |
951 | if (string == NULL) | |
952 | goto out_nomem; | |
953 | mnt->nfs_server.address.sin_family = AF_INET; | |
954 | mnt->nfs_server.address.sin_addr.s_addr = | |
955 | in_aton(string); | |
956 | kfree(string); | |
957 | break; | |
958 | case Opt_clientaddr: | |
959 | string = match_strdup(args); | |
960 | if (string == NULL) | |
961 | goto out_nomem; | |
962 | mnt->client_address = string; | |
963 | break; | |
964 | case Opt_mounthost: | |
965 | string = match_strdup(args); | |
966 | if (string == NULL) | |
967 | goto out_nomem; | |
968 | mnt->mount_server.address.sin_family = AF_INET; | |
969 | mnt->mount_server.address.sin_addr.s_addr = | |
970 | in_aton(string); | |
971 | kfree(string); | |
972 | break; | |
973 | ||
974 | case Opt_userspace: | |
975 | case Opt_deprecated: | |
976 | break; | |
977 | ||
978 | default: | |
979 | goto out_unknown; | |
980 | } | |
981 | } | |
982 | ||
983 | return 1; | |
984 | ||
985 | out_nomem: | |
986 | printk(KERN_INFO "NFS: not enough memory to parse option\n"); | |
987 | return 0; | |
988 | ||
989 | out_unrec_vers: | |
990 | printk(KERN_INFO "NFS: unrecognized NFS version number\n"); | |
991 | return 0; | |
992 | ||
993 | out_unrec_xprt: | |
994 | printk(KERN_INFO "NFS: unrecognized transport protocol\n"); | |
995 | return 0; | |
996 | ||
997 | out_unrec_sec: | |
998 | printk(KERN_INFO "NFS: unrecognized security flavor\n"); | |
999 | return 0; | |
1000 | ||
1001 | out_unknown: | |
1002 | printk(KERN_INFO "NFS: unknown mount option: %s\n", p); | |
1003 | return 0; | |
1004 | } | |
1005 | ||
0076d7b7 CL |
1006 | /* |
1007 | * Use the remote server's MOUNT service to request the NFS file handle | |
1008 | * corresponding to the provided path. | |
1009 | */ | |
1010 | static int nfs_try_mount(struct nfs_parsed_mount_data *args, | |
1011 | struct nfs_fh *root_fh) | |
1012 | { | |
1013 | struct sockaddr_in sin; | |
1014 | int status; | |
1015 | ||
1016 | if (args->mount_server.version == 0) { | |
1017 | if (args->flags & NFS_MOUNT_VER3) | |
1018 | args->mount_server.version = NFS_MNT3_VERSION; | |
1019 | else | |
1020 | args->mount_server.version = NFS_MNT_VERSION; | |
1021 | } | |
1022 | ||
1023 | /* | |
1024 | * Construct the mount server's address. | |
1025 | */ | |
1026 | if (args->mount_server.address.sin_addr.s_addr != INADDR_ANY) | |
1027 | sin = args->mount_server.address; | |
1028 | else | |
1029 | sin = args->nfs_server.address; | |
1030 | if (args->mount_server.port == 0) { | |
1031 | status = rpcb_getport_sync(&sin, | |
1032 | args->mount_server.program, | |
1033 | args->mount_server.version, | |
1034 | args->mount_server.protocol); | |
1035 | if (status < 0) | |
1036 | goto out_err; | |
1037 | sin.sin_port = htons(status); | |
1038 | } else | |
1039 | sin.sin_port = htons(args->mount_server.port); | |
1040 | ||
1041 | /* | |
1042 | * Now ask the mount server to map our export path | |
1043 | * to a file handle. | |
1044 | */ | |
1045 | status = nfs_mount((struct sockaddr *) &sin, | |
1046 | sizeof(sin), | |
1047 | args->nfs_server.hostname, | |
1048 | args->nfs_server.export_path, | |
1049 | args->mount_server.version, | |
1050 | args->mount_server.protocol, | |
1051 | root_fh); | |
1052 | if (status < 0) | |
1053 | goto out_err; | |
1054 | ||
1055 | return status; | |
1056 | ||
1057 | out_err: | |
1058 | dfprintk(MOUNT, "NFS: unable to contact server on host " | |
1059 | NIPQUAD_FMT "\n", NIPQUAD(sin.sin_addr.s_addr)); | |
1060 | return status; | |
1061 | } | |
1062 | ||
f7b422b1 | 1063 | /* |
54ceac45 DH |
1064 | * Validate the NFS2/NFS3 mount data |
1065 | * - fills in the mount root filehandle | |
136d558c CL |
1066 | * |
1067 | * For option strings, user space handles the following behaviors: | |
1068 | * | |
1069 | * + DNS: mapping server host name to IP address ("addr=" option) | |
1070 | * | |
1071 | * + failure mode: how to behave if a mount request can't be handled | |
1072 | * immediately ("fg/bg" option) | |
1073 | * | |
1074 | * + retry: how often to retry a mount request ("retry=" option) | |
1075 | * | |
1076 | * + breaking back: trying proto=udp after proto=tcp, v2 after v3, | |
1077 | * mountproto=tcp after mountproto=udp, and so on | |
1078 | * | |
1079 | * XXX: as far as I can tell, changing the NFS program number is not | |
1080 | * supported in the NFS client. | |
f7b422b1 | 1081 | */ |
136d558c CL |
1082 | static int nfs_validate_mount_data(struct nfs_mount_data **options, |
1083 | struct nfs_fh *mntfh, | |
1084 | const char *dev_name) | |
f7b422b1 | 1085 | { |
136d558c CL |
1086 | struct nfs_mount_data *data = *options; |
1087 | ||
5df36e78 CL |
1088 | if (data == NULL) |
1089 | goto out_no_data; | |
f7b422b1 | 1090 | |
54ceac45 | 1091 | switch (data->version) { |
5df36e78 CL |
1092 | case 1: |
1093 | data->namlen = 0; | |
1094 | case 2: | |
1095 | data->bsize = 0; | |
1096 | case 3: | |
1097 | if (data->flags & NFS_MOUNT_VER3) | |
1098 | goto out_no_v3; | |
1099 | data->root.size = NFS2_FHSIZE; | |
1100 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
1101 | case 4: | |
1102 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1103 | goto out_no_sec; | |
1104 | case 5: | |
1105 | memset(data->context, 0, sizeof(data->context)); | |
1106 | case 6: | |
1107 | if (data->flags & NFS_MOUNT_VER3) | |
1108 | mntfh->size = data->root.size; | |
1109 | else | |
1110 | mntfh->size = NFS2_FHSIZE; | |
1111 | ||
1112 | if (mntfh->size > sizeof(mntfh->data)) | |
1113 | goto out_invalid_fh; | |
1114 | ||
1115 | memcpy(mntfh->data, data->root.data, mntfh->size); | |
1116 | if (mntfh->size < sizeof(mntfh->data)) | |
1117 | memset(mntfh->data + mntfh->size, 0, | |
1118 | sizeof(mntfh->data) - mntfh->size); | |
1119 | break; | |
136d558c CL |
1120 | default: { |
1121 | unsigned int len; | |
1122 | char *c; | |
1123 | int status; | |
1124 | struct nfs_parsed_mount_data args = { | |
1125 | .flags = (NFS_MOUNT_VER3 | NFS_MOUNT_TCP), | |
1126 | .rsize = NFS_MAX_FILE_IO_SIZE, | |
1127 | .wsize = NFS_MAX_FILE_IO_SIZE, | |
1128 | .timeo = 600, | |
1129 | .retrans = 2, | |
1130 | .acregmin = 3, | |
1131 | .acregmax = 60, | |
1132 | .acdirmin = 30, | |
1133 | .acdirmax = 60, | |
1134 | .mount_server.protocol = IPPROTO_UDP, | |
1135 | .mount_server.program = NFS_MNT_PROGRAM, | |
1136 | .nfs_server.protocol = IPPROTO_TCP, | |
1137 | .nfs_server.program = NFS_PROGRAM, | |
1138 | }; | |
1139 | ||
1140 | if (nfs_parse_mount_options((char *) *options, &args) == 0) | |
1141 | return -EINVAL; | |
1142 | ||
1143 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
1144 | if (data == NULL) | |
1145 | return -ENOMEM; | |
1146 | ||
1147 | /* | |
1148 | * NB: after this point, caller will free "data" | |
1149 | * if we return an error | |
1150 | */ | |
1151 | *options = data; | |
1152 | ||
1153 | c = strchr(dev_name, ':'); | |
1154 | if (c == NULL) | |
1155 | return -EINVAL; | |
1156 | len = c - dev_name - 1; | |
1157 | if (len > sizeof(data->hostname)) | |
1158 | return -EINVAL; | |
1159 | strncpy(data->hostname, dev_name, len); | |
1160 | args.nfs_server.hostname = data->hostname; | |
1161 | ||
1162 | c++; | |
1163 | if (strlen(c) > NFS_MAXPATHLEN) | |
1164 | return -EINVAL; | |
1165 | args.nfs_server.export_path = c; | |
1166 | ||
1167 | status = nfs_try_mount(&args, mntfh); | |
1168 | if (status) | |
fdc6e2c8 | 1169 | return status; |
136d558c CL |
1170 | |
1171 | /* | |
1172 | * Translate to nfs_mount_data, which nfs_fill_super | |
1173 | * can deal with. | |
1174 | */ | |
1175 | data->version = 6; | |
1176 | data->flags = args.flags; | |
1177 | data->rsize = args.rsize; | |
1178 | data->wsize = args.wsize; | |
1179 | data->timeo = args.timeo; | |
1180 | data->retrans = args.retrans; | |
1181 | data->acregmin = args.acregmin; | |
1182 | data->acregmax = args.acregmax; | |
1183 | data->acdirmin = args.acdirmin; | |
1184 | data->acdirmax = args.acdirmax; | |
1185 | data->addr = args.nfs_server.address; | |
1186 | data->namlen = args.namlen; | |
1187 | data->bsize = args.bsize; | |
1188 | data->pseudoflavor = args.auth_flavors[0]; | |
1189 | ||
1190 | break; | |
1191 | } | |
f7b422b1 | 1192 | } |
54ceac45 | 1193 | |
36b15c54 TM |
1194 | if (!(data->flags & NFS_MOUNT_SECFLAVOUR)) |
1195 | data->pseudoflavor = RPC_AUTH_UNIX; | |
1196 | ||
54ceac45 | 1197 | #ifndef CONFIG_NFS_V3 |
5df36e78 CL |
1198 | if (data->flags & NFS_MOUNT_VER3) |
1199 | goto out_v3_not_compiled; | |
1200 | #endif /* !CONFIG_NFS_V3 */ | |
f7b422b1 | 1201 | |
5df36e78 CL |
1202 | if (!nfs_verify_server_address((struct sockaddr *) &data->addr)) |
1203 | goto out_no_address; | |
f7b422b1 | 1204 | |
5df36e78 | 1205 | return 0; |
f7b422b1 | 1206 | |
5df36e78 CL |
1207 | out_no_data: |
1208 | dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); | |
1209 | return -EINVAL; | |
54ceac45 | 1210 | |
5df36e78 CL |
1211 | out_no_v3: |
1212 | dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", | |
1213 | data->version); | |
1214 | return -EINVAL; | |
f7b422b1 | 1215 | |
5df36e78 CL |
1216 | out_no_sec: |
1217 | dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); | |
1218 | return -EINVAL; | |
1219 | ||
5df36e78 CL |
1220 | #ifndef CONFIG_NFS_V3 |
1221 | out_v3_not_compiled: | |
1222 | dfprintk(MOUNT, "NFS: NFSv3 is not compiled into kernel\n"); | |
1223 | return -EPROTONOSUPPORT; | |
1224 | #endif /* !CONFIG_NFS_V3 */ | |
1225 | ||
1226 | out_no_address: | |
1227 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); | |
1228 | return -EINVAL; | |
1229 | ||
1230 | out_invalid_fh: | |
1231 | dfprintk(MOUNT, "NFS: invalid root filehandle\n"); | |
1232 | return -EINVAL; | |
f7b422b1 DH |
1233 | } |
1234 | ||
f7b422b1 | 1235 | /* |
54ceac45 | 1236 | * Initialise the common bits of the superblock |
f7b422b1 | 1237 | */ |
54ceac45 | 1238 | static inline void nfs_initialise_sb(struct super_block *sb) |
f7b422b1 | 1239 | { |
54ceac45 | 1240 | struct nfs_server *server = NFS_SB(sb); |
5006a76c | 1241 | |
54ceac45 | 1242 | sb->s_magic = NFS_SUPER_MAGIC; |
f7b422b1 | 1243 | |
54ceac45 DH |
1244 | /* We probably want something more informative here */ |
1245 | snprintf(sb->s_id, sizeof(sb->s_id), | |
1246 | "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev)); | |
5006a76c | 1247 | |
54ceac45 DH |
1248 | if (sb->s_blocksize == 0) |
1249 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
1250 | &sb->s_blocksize_bits); | |
f7b422b1 | 1251 | |
54ceac45 DH |
1252 | if (server->flags & NFS_MOUNT_NOAC) |
1253 | sb->s_flags |= MS_SYNCHRONOUS; | |
f7b422b1 | 1254 | |
54ceac45 | 1255 | nfs_super_set_maxbytes(sb, server->maxfilesize); |
f7b422b1 DH |
1256 | } |
1257 | ||
1258 | /* | |
54ceac45 | 1259 | * Finish setting up an NFS2/3 superblock |
f7b422b1 | 1260 | */ |
54ceac45 | 1261 | static void nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data) |
f7b422b1 DH |
1262 | { |
1263 | struct nfs_server *server = NFS_SB(sb); | |
5006a76c | 1264 | |
54ceac45 DH |
1265 | sb->s_blocksize_bits = 0; |
1266 | sb->s_blocksize = 0; | |
1267 | if (data->bsize) | |
1268 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); | |
f7b422b1 | 1269 | |
54ceac45 DH |
1270 | if (server->flags & NFS_MOUNT_VER3) { |
1271 | /* The VFS shouldn't apply the umask to mode bits. We will do | |
1272 | * so ourselves when necessary. | |
1273 | */ | |
1274 | sb->s_flags |= MS_POSIXACL; | |
1275 | sb->s_time_gran = 1; | |
816724e6 | 1276 | } |
54ceac45 DH |
1277 | |
1278 | sb->s_op = &nfs_sops; | |
1279 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1280 | } |
1281 | ||
1282 | /* | |
54ceac45 | 1283 | * Finish setting up a cloned NFS2/3 superblock |
f7b422b1 | 1284 | */ |
54ceac45 DH |
1285 | static void nfs_clone_super(struct super_block *sb, |
1286 | const struct super_block *old_sb) | |
f7b422b1 | 1287 | { |
54ceac45 DH |
1288 | struct nfs_server *server = NFS_SB(sb); |
1289 | ||
1290 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; | |
1291 | sb->s_blocksize = old_sb->s_blocksize; | |
1292 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 1293 | |
f7b422b1 | 1294 | if (server->flags & NFS_MOUNT_VER3) { |
54ceac45 DH |
1295 | /* The VFS shouldn't apply the umask to mode bits. We will do |
1296 | * so ourselves when necessary. | |
f7b422b1 DH |
1297 | */ |
1298 | sb->s_flags |= MS_POSIXACL; | |
f7b422b1 | 1299 | sb->s_time_gran = 1; |
f7b422b1 DH |
1300 | } |
1301 | ||
54ceac45 DH |
1302 | sb->s_op = old_sb->s_op; |
1303 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1304 | } |
1305 | ||
275a5d24 TM |
1306 | #define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS) |
1307 | ||
1308 | static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags) | |
1309 | { | |
1310 | const struct nfs_server *a = s->s_fs_info; | |
1311 | const struct rpc_clnt *clnt_a = a->client; | |
1312 | const struct rpc_clnt *clnt_b = b->client; | |
1313 | ||
1314 | if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK)) | |
1315 | goto Ebusy; | |
1316 | if (a->nfs_client != b->nfs_client) | |
1317 | goto Ebusy; | |
1318 | if (a->flags != b->flags) | |
1319 | goto Ebusy; | |
1320 | if (a->wsize != b->wsize) | |
1321 | goto Ebusy; | |
1322 | if (a->rsize != b->rsize) | |
1323 | goto Ebusy; | |
1324 | if (a->acregmin != b->acregmin) | |
1325 | goto Ebusy; | |
1326 | if (a->acregmax != b->acregmax) | |
1327 | goto Ebusy; | |
1328 | if (a->acdirmin != b->acdirmin) | |
1329 | goto Ebusy; | |
1330 | if (a->acdirmax != b->acdirmax) | |
1331 | goto Ebusy; | |
1332 | if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) | |
1333 | goto Ebusy; | |
e89a5a43 | 1334 | return 1; |
275a5d24 | 1335 | Ebusy: |
e89a5a43 TM |
1336 | return 0; |
1337 | } | |
1338 | ||
1339 | struct nfs_sb_mountdata { | |
1340 | struct nfs_server *server; | |
1341 | int mntflags; | |
1342 | }; | |
1343 | ||
1344 | static int nfs_set_super(struct super_block *s, void *data) | |
1345 | { | |
1346 | struct nfs_sb_mountdata *sb_mntdata = data; | |
1347 | struct nfs_server *server = sb_mntdata->server; | |
1348 | int ret; | |
1349 | ||
1350 | s->s_flags = sb_mntdata->mntflags; | |
1351 | s->s_fs_info = server; | |
1352 | ret = set_anon_super(s, server); | |
1353 | if (ret == 0) | |
1354 | server->s_dev = s->s_dev; | |
1355 | return ret; | |
1356 | } | |
1357 | ||
1358 | static int nfs_compare_super(struct super_block *sb, void *data) | |
1359 | { | |
1360 | struct nfs_sb_mountdata *sb_mntdata = data; | |
1361 | struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb); | |
1362 | int mntflags = sb_mntdata->mntflags; | |
1363 | ||
1364 | if (memcmp(&old->nfs_client->cl_addr, | |
1365 | &server->nfs_client->cl_addr, | |
1366 | sizeof(old->nfs_client->cl_addr)) != 0) | |
1367 | return 0; | |
1368 | /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */ | |
1369 | if (old->flags & NFS_MOUNT_UNSHARED) | |
1370 | return 0; | |
1371 | if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0) | |
1372 | return 0; | |
1373 | return nfs_compare_mount_options(sb, server, mntflags); | |
275a5d24 TM |
1374 | } |
1375 | ||
816724e6 TM |
1376 | static int nfs_get_sb(struct file_system_type *fs_type, |
1377 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
f7b422b1 | 1378 | { |
f7b422b1 DH |
1379 | struct nfs_server *server = NULL; |
1380 | struct super_block *s; | |
54ceac45 | 1381 | struct nfs_fh mntfh; |
f7b422b1 | 1382 | struct nfs_mount_data *data = raw_data; |
54ceac45 | 1383 | struct dentry *mntroot; |
75180df2 | 1384 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1385 | struct nfs_sb_mountdata sb_mntdata = { |
1386 | .mntflags = flags, | |
1387 | }; | |
54ceac45 | 1388 | int error; |
f7b422b1 | 1389 | |
54ceac45 | 1390 | /* Validate the mount data */ |
136d558c | 1391 | error = nfs_validate_mount_data(&data, &mntfh, dev_name); |
54ceac45 | 1392 | if (error < 0) |
0655960f | 1393 | goto out; |
f7b422b1 | 1394 | |
54ceac45 DH |
1395 | /* Get a volume representation */ |
1396 | server = nfs_create_server(data, &mntfh); | |
1397 | if (IS_ERR(server)) { | |
1398 | error = PTR_ERR(server); | |
0655960f | 1399 | goto out; |
f7b422b1 | 1400 | } |
e89a5a43 | 1401 | sb_mntdata.server = server; |
f7b422b1 | 1402 | |
75180df2 TM |
1403 | if (server->flags & NFS_MOUNT_UNSHARED) |
1404 | compare_super = NULL; | |
1405 | ||
54ceac45 | 1406 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1407 | s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
1408 | if (IS_ERR(s)) { |
1409 | error = PTR_ERR(s); | |
54ceac45 | 1410 | goto out_err_nosb; |
816724e6 TM |
1411 | } |
1412 | ||
54ceac45 DH |
1413 | if (s->s_fs_info != server) { |
1414 | nfs_free_server(server); | |
1415 | server = NULL; | |
1416 | } | |
f7b422b1 | 1417 | |
54ceac45 DH |
1418 | if (!s->s_root) { |
1419 | /* initial superblock/root creation */ | |
54ceac45 DH |
1420 | nfs_fill_super(s, data); |
1421 | } | |
f7b422b1 | 1422 | |
54ceac45 DH |
1423 | mntroot = nfs_get_root(s, &mntfh); |
1424 | if (IS_ERR(mntroot)) { | |
1425 | error = PTR_ERR(mntroot); | |
1426 | goto error_splat_super; | |
f7b422b1 | 1427 | } |
816724e6 | 1428 | |
54ceac45 DH |
1429 | s->s_flags |= MS_ACTIVE; |
1430 | mnt->mnt_sb = s; | |
1431 | mnt->mnt_root = mntroot; | |
0655960f CL |
1432 | error = 0; |
1433 | ||
1434 | out: | |
136d558c CL |
1435 | if (data != raw_data) |
1436 | kfree(data); | |
0655960f | 1437 | return error; |
816724e6 | 1438 | |
54ceac45 DH |
1439 | out_err_nosb: |
1440 | nfs_free_server(server); | |
0655960f | 1441 | goto out; |
54ceac45 DH |
1442 | |
1443 | error_splat_super: | |
1444 | up_write(&s->s_umount); | |
1445 | deactivate_super(s); | |
0655960f | 1446 | goto out; |
f7b422b1 DH |
1447 | } |
1448 | ||
54ceac45 DH |
1449 | /* |
1450 | * Destroy an NFS2/3 superblock | |
1451 | */ | |
f7b422b1 DH |
1452 | static void nfs_kill_super(struct super_block *s) |
1453 | { | |
1454 | struct nfs_server *server = NFS_SB(s); | |
1455 | ||
1456 | kill_anon_super(s); | |
54ceac45 | 1457 | nfs_free_server(server); |
f7b422b1 DH |
1458 | } |
1459 | ||
54ceac45 DH |
1460 | /* |
1461 | * Clone an NFS2/3 server record on xdev traversal (FSID-change) | |
1462 | */ | |
1463 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags, | |
1464 | const char *dev_name, void *raw_data, | |
1465 | struct vfsmount *mnt) | |
f7b422b1 DH |
1466 | { |
1467 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
1468 | struct super_block *s; |
1469 | struct nfs_server *server; | |
1470 | struct dentry *mntroot; | |
75180df2 | 1471 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1472 | struct nfs_sb_mountdata sb_mntdata = { |
1473 | .mntflags = flags, | |
1474 | }; | |
54ceac45 | 1475 | int error; |
f7b422b1 | 1476 | |
54ceac45 | 1477 | dprintk("--> nfs_xdev_get_sb()\n"); |
f7b422b1 | 1478 | |
54ceac45 DH |
1479 | /* create a new volume representation */ |
1480 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
1481 | if (IS_ERR(server)) { | |
1482 | error = PTR_ERR(server); | |
1483 | goto out_err_noserver; | |
1484 | } | |
e89a5a43 | 1485 | sb_mntdata.server = server; |
8fa5c000 | 1486 | |
75180df2 TM |
1487 | if (server->flags & NFS_MOUNT_UNSHARED) |
1488 | compare_super = NULL; | |
1489 | ||
54ceac45 | 1490 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1491 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
1492 | if (IS_ERR(s)) { |
1493 | error = PTR_ERR(s); | |
1494 | goto out_err_nosb; | |
1495 | } | |
5006a76c | 1496 | |
54ceac45 DH |
1497 | if (s->s_fs_info != server) { |
1498 | nfs_free_server(server); | |
1499 | server = NULL; | |
f7b422b1 | 1500 | } |
24c8dbbb | 1501 | |
54ceac45 DH |
1502 | if (!s->s_root) { |
1503 | /* initial superblock/root creation */ | |
54ceac45 DH |
1504 | nfs_clone_super(s, data->sb); |
1505 | } | |
f7b422b1 | 1506 | |
54ceac45 DH |
1507 | mntroot = nfs_get_root(s, data->fh); |
1508 | if (IS_ERR(mntroot)) { | |
1509 | error = PTR_ERR(mntroot); | |
1510 | goto error_splat_super; | |
f7b422b1 DH |
1511 | } |
1512 | ||
54ceac45 DH |
1513 | s->s_flags |= MS_ACTIVE; |
1514 | mnt->mnt_sb = s; | |
1515 | mnt->mnt_root = mntroot; | |
f7b422b1 | 1516 | |
54ceac45 DH |
1517 | dprintk("<-- nfs_xdev_get_sb() = 0\n"); |
1518 | return 0; | |
24c8dbbb | 1519 | |
54ceac45 DH |
1520 | out_err_nosb: |
1521 | nfs_free_server(server); | |
1522 | out_err_noserver: | |
1523 | dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error); | |
1524 | return error; | |
f7b422b1 | 1525 | |
54ceac45 DH |
1526 | error_splat_super: |
1527 | up_write(&s->s_umount); | |
1528 | deactivate_super(s); | |
1529 | dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error); | |
1530 | return error; | |
f7b422b1 DH |
1531 | } |
1532 | ||
54ceac45 DH |
1533 | #ifdef CONFIG_NFS_V4 |
1534 | ||
f7b422b1 | 1535 | /* |
54ceac45 | 1536 | * Finish setting up a cloned NFS4 superblock |
f7b422b1 | 1537 | */ |
54ceac45 DH |
1538 | static void nfs4_clone_super(struct super_block *sb, |
1539 | const struct super_block *old_sb) | |
f7b422b1 | 1540 | { |
54ceac45 DH |
1541 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; |
1542 | sb->s_blocksize = old_sb->s_blocksize; | |
1543 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 1544 | sb->s_time_gran = 1; |
54ceac45 DH |
1545 | sb->s_op = old_sb->s_op; |
1546 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1547 | } |
1548 | ||
54ceac45 DH |
1549 | /* |
1550 | * Set up an NFS4 superblock | |
1551 | */ | |
1552 | static void nfs4_fill_super(struct super_block *sb) | |
f7b422b1 | 1553 | { |
54ceac45 DH |
1554 | sb->s_time_gran = 1; |
1555 | sb->s_op = &nfs4_sops; | |
1556 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1557 | } |
1558 | ||
f0768ebd CL |
1559 | /* |
1560 | * Validate NFSv4 mount options | |
1561 | */ | |
1562 | static int nfs4_validate_mount_data(struct nfs4_mount_data **options, | |
1563 | const char *dev_name, | |
1564 | struct sockaddr_in *addr, | |
1565 | rpc_authflavor_t *authflavour, | |
1566 | char **hostname, | |
1567 | char **mntpath, | |
1568 | char **ip_addr) | |
1569 | { | |
1570 | struct nfs4_mount_data *data = *options; | |
1571 | char *c; | |
1572 | ||
1573 | if (data == NULL) | |
1574 | goto out_no_data; | |
1575 | ||
1576 | switch (data->version) { | |
1577 | case 1: | |
1578 | if (data->host_addrlen != sizeof(*addr)) | |
1579 | goto out_no_address; | |
1580 | if (copy_from_user(addr, data->host_addr, sizeof(*addr))) | |
1581 | return -EFAULT; | |
1582 | if (addr->sin_port == 0) | |
1583 | addr->sin_port = htons(NFS_PORT); | |
1584 | if (!nfs_verify_server_address((struct sockaddr *) addr)) | |
1585 | goto out_no_address; | |
1586 | ||
1587 | switch (data->auth_flavourlen) { | |
1588 | case 0: | |
1589 | *authflavour = RPC_AUTH_UNIX; | |
1590 | break; | |
1591 | case 1: | |
1592 | if (copy_from_user(authflavour, data->auth_flavours, | |
1593 | sizeof(*authflavour))) | |
1594 | return -EFAULT; | |
1595 | break; | |
1596 | default: | |
1597 | goto out_inval_auth; | |
1598 | } | |
1599 | ||
1600 | c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); | |
1601 | if (IS_ERR(c)) | |
1602 | return PTR_ERR(c); | |
1603 | *hostname = c; | |
1604 | ||
1605 | c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); | |
1606 | if (IS_ERR(c)) | |
1607 | return PTR_ERR(c); | |
1608 | *mntpath = c; | |
1609 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *mntpath); | |
1610 | ||
1611 | c = strndup_user(data->client_addr.data, 16); | |
1612 | if (IS_ERR(c)) | |
1613 | return PTR_ERR(c); | |
1614 | *ip_addr = c; | |
1615 | ||
1616 | break; | |
80071225 CL |
1617 | default: { |
1618 | unsigned int len; | |
1619 | struct nfs_parsed_mount_data args = { | |
1620 | .rsize = NFS_MAX_FILE_IO_SIZE, | |
1621 | .wsize = NFS_MAX_FILE_IO_SIZE, | |
1622 | .timeo = 600, | |
1623 | .retrans = 2, | |
1624 | .acregmin = 3, | |
1625 | .acregmax = 60, | |
1626 | .acdirmin = 30, | |
1627 | .acdirmax = 60, | |
1628 | .nfs_server.protocol = IPPROTO_TCP, | |
1629 | }; | |
1630 | ||
1631 | if (nfs_parse_mount_options((char *) *options, &args) == 0) | |
1632 | return -EINVAL; | |
1633 | ||
1634 | if (!nfs_verify_server_address((struct sockaddr *) | |
1635 | &args.nfs_server.address)) | |
1636 | return -EINVAL; | |
1637 | *addr = args.nfs_server.address; | |
1638 | ||
1639 | switch (args.auth_flavor_len) { | |
1640 | case 0: | |
1641 | *authflavour = RPC_AUTH_UNIX; | |
1642 | break; | |
1643 | case 1: | |
1644 | *authflavour = (rpc_authflavor_t) args.auth_flavors[0]; | |
1645 | break; | |
1646 | default: | |
1647 | goto out_inval_auth; | |
1648 | } | |
1649 | ||
1650 | /* | |
1651 | * Translate to nfs4_mount_data, which nfs4_fill_super | |
1652 | * can deal with. | |
1653 | */ | |
1654 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
1655 | if (data == NULL) | |
1656 | return -ENOMEM; | |
1657 | *options = data; | |
1658 | ||
1659 | data->version = 1; | |
1660 | data->flags = args.flags & NFS4_MOUNT_FLAGMASK; | |
1661 | data->rsize = args.rsize; | |
1662 | data->wsize = args.wsize; | |
1663 | data->timeo = args.timeo; | |
1664 | data->retrans = args.retrans; | |
1665 | data->acregmin = args.acregmin; | |
1666 | data->acregmax = args.acregmax; | |
1667 | data->acdirmin = args.acdirmin; | |
1668 | data->acdirmax = args.acdirmax; | |
1669 | data->proto = args.nfs_server.protocol; | |
1670 | ||
1671 | /* | |
1672 | * Split "dev_name" into "hostname:mntpath". | |
1673 | */ | |
1674 | c = strchr(dev_name, ':'); | |
1675 | if (c == NULL) | |
1676 | return -EINVAL; | |
1677 | /* while calculating len, pretend ':' is '\0' */ | |
1678 | len = c - dev_name; | |
1679 | if (len > NFS4_MAXNAMLEN) | |
1680 | return -EINVAL; | |
1681 | *hostname = kzalloc(len, GFP_KERNEL); | |
1682 | if (*hostname == NULL) | |
1683 | return -ENOMEM; | |
1684 | strncpy(*hostname, dev_name, len - 1); | |
1685 | ||
1686 | c++; /* step over the ':' */ | |
1687 | len = strlen(c); | |
1688 | if (len > NFS4_MAXPATHLEN) | |
1689 | return -EINVAL; | |
1690 | *mntpath = kzalloc(len + 1, GFP_KERNEL); | |
1691 | if (*mntpath == NULL) | |
1692 | return -ENOMEM; | |
1693 | strncpy(*mntpath, c, len); | |
1694 | ||
1695 | dprintk("MNTPATH: %s\n", *mntpath); | |
1696 | ||
0a87cf12 JL |
1697 | if (args.client_address == NULL) |
1698 | goto out_no_client_address; | |
1699 | ||
80071225 CL |
1700 | *ip_addr = args.client_address; |
1701 | ||
1702 | break; | |
1703 | } | |
f0768ebd CL |
1704 | } |
1705 | ||
1706 | return 0; | |
1707 | ||
1708 | out_no_data: | |
1709 | dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); | |
1710 | return -EINVAL; | |
1711 | ||
1712 | out_inval_auth: | |
1713 | dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", | |
1714 | data->auth_flavourlen); | |
1715 | return -EINVAL; | |
1716 | ||
1717 | out_no_address: | |
1718 | dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); | |
1719 | return -EINVAL; | |
0a87cf12 JL |
1720 | |
1721 | out_no_client_address: | |
1722 | dfprintk(MOUNT, "NFS4: mount program didn't pass callback address\n"); | |
1723 | return -EINVAL; | |
f0768ebd CL |
1724 | } |
1725 | ||
54ceac45 DH |
1726 | /* |
1727 | * Get the superblock for an NFS4 mountpoint | |
1728 | */ | |
816724e6 TM |
1729 | static int nfs4_get_sb(struct file_system_type *fs_type, |
1730 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
f7b422b1 | 1731 | { |
f7b422b1 | 1732 | struct nfs4_mount_data *data = raw_data; |
54ceac45 DH |
1733 | struct super_block *s; |
1734 | struct nfs_server *server; | |
1735 | struct sockaddr_in addr; | |
1736 | rpc_authflavor_t authflavour; | |
1737 | struct nfs_fh mntfh; | |
1738 | struct dentry *mntroot; | |
f0768ebd | 1739 | char *mntpath = NULL, *hostname = NULL, *ip_addr = NULL; |
75180df2 | 1740 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1741 | struct nfs_sb_mountdata sb_mntdata = { |
1742 | .mntflags = flags, | |
1743 | }; | |
54ceac45 | 1744 | int error; |
f7b422b1 | 1745 | |
f0768ebd CL |
1746 | /* Validate the mount data */ |
1747 | error = nfs4_validate_mount_data(&data, dev_name, &addr, &authflavour, | |
1748 | &hostname, &mntpath, &ip_addr); | |
1749 | if (error < 0) | |
1750 | goto out; | |
f7b422b1 | 1751 | |
54ceac45 DH |
1752 | /* Get a volume representation */ |
1753 | server = nfs4_create_server(data, hostname, &addr, mntpath, ip_addr, | |
1754 | authflavour, &mntfh); | |
1755 | if (IS_ERR(server)) { | |
1756 | error = PTR_ERR(server); | |
29eb981a | 1757 | goto out; |
f7b422b1 | 1758 | } |
e89a5a43 | 1759 | sb_mntdata.server = server; |
f7b422b1 | 1760 | |
75180df2 TM |
1761 | if (server->flags & NFS4_MOUNT_UNSHARED) |
1762 | compare_super = NULL; | |
1763 | ||
54ceac45 | 1764 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1765 | s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
1766 | if (IS_ERR(s)) { |
1767 | error = PTR_ERR(s); | |
f7b422b1 | 1768 | goto out_free; |
816724e6 TM |
1769 | } |
1770 | ||
5dd3177a TM |
1771 | if (s->s_fs_info != server) { |
1772 | nfs_free_server(server); | |
1773 | server = NULL; | |
1774 | } | |
1775 | ||
54ceac45 DH |
1776 | if (!s->s_root) { |
1777 | /* initial superblock/root creation */ | |
54ceac45 | 1778 | nfs4_fill_super(s); |
54ceac45 | 1779 | } |
f7b422b1 | 1780 | |
54ceac45 DH |
1781 | mntroot = nfs4_get_root(s, &mntfh); |
1782 | if (IS_ERR(mntroot)) { | |
1783 | error = PTR_ERR(mntroot); | |
1784 | goto error_splat_super; | |
f7b422b1 | 1785 | } |
54ceac45 | 1786 | |
f7b422b1 | 1787 | s->s_flags |= MS_ACTIVE; |
54ceac45 DH |
1788 | mnt->mnt_sb = s; |
1789 | mnt->mnt_root = mntroot; | |
29eb981a CL |
1790 | error = 0; |
1791 | ||
1792 | out: | |
1793 | kfree(ip_addr); | |
54ceac45 DH |
1794 | kfree(mntpath); |
1795 | kfree(hostname); | |
29eb981a | 1796 | return error; |
54ceac45 | 1797 | |
f7b422b1 | 1798 | out_free: |
54ceac45 | 1799 | nfs_free_server(server); |
29eb981a | 1800 | goto out; |
54ceac45 DH |
1801 | |
1802 | error_splat_super: | |
1803 | up_write(&s->s_umount); | |
1804 | deactivate_super(s); | |
29eb981a | 1805 | goto out; |
f7b422b1 DH |
1806 | } |
1807 | ||
1808 | static void nfs4_kill_super(struct super_block *sb) | |
1809 | { | |
1810 | struct nfs_server *server = NFS_SB(sb); | |
1811 | ||
1812 | nfs_return_all_delegations(sb); | |
1813 | kill_anon_super(sb); | |
1814 | ||
1815 | nfs4_renewd_prepare_shutdown(server); | |
54ceac45 | 1816 | nfs_free_server(server); |
f7b422b1 DH |
1817 | } |
1818 | ||
1819 | /* | |
54ceac45 | 1820 | * Clone an NFS4 server record on xdev traversal (FSID-change) |
f7b422b1 | 1821 | */ |
54ceac45 DH |
1822 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags, |
1823 | const char *dev_name, void *raw_data, | |
1824 | struct vfsmount *mnt) | |
f7b422b1 | 1825 | { |
54ceac45 DH |
1826 | struct nfs_clone_mount *data = raw_data; |
1827 | struct super_block *s; | |
1828 | struct nfs_server *server; | |
1829 | struct dentry *mntroot; | |
75180df2 | 1830 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1831 | struct nfs_sb_mountdata sb_mntdata = { |
1832 | .mntflags = flags, | |
1833 | }; | |
54ceac45 | 1834 | int error; |
f7b422b1 | 1835 | |
54ceac45 | 1836 | dprintk("--> nfs4_xdev_get_sb()\n"); |
f7b422b1 | 1837 | |
54ceac45 DH |
1838 | /* create a new volume representation */ |
1839 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
1840 | if (IS_ERR(server)) { | |
1841 | error = PTR_ERR(server); | |
1842 | goto out_err_noserver; | |
f7b422b1 | 1843 | } |
e89a5a43 | 1844 | sb_mntdata.server = server; |
f7b422b1 | 1845 | |
75180df2 TM |
1846 | if (server->flags & NFS4_MOUNT_UNSHARED) |
1847 | compare_super = NULL; | |
1848 | ||
54ceac45 | 1849 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1850 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
1851 | if (IS_ERR(s)) { |
1852 | error = PTR_ERR(s); | |
1853 | goto out_err_nosb; | |
f7b422b1 | 1854 | } |
f7b422b1 | 1855 | |
54ceac45 DH |
1856 | if (s->s_fs_info != server) { |
1857 | nfs_free_server(server); | |
1858 | server = NULL; | |
1859 | } | |
f7b422b1 | 1860 | |
54ceac45 DH |
1861 | if (!s->s_root) { |
1862 | /* initial superblock/root creation */ | |
54ceac45 DH |
1863 | nfs4_clone_super(s, data->sb); |
1864 | } | |
f7b422b1 | 1865 | |
54ceac45 DH |
1866 | mntroot = nfs4_get_root(s, data->fh); |
1867 | if (IS_ERR(mntroot)) { | |
1868 | error = PTR_ERR(mntroot); | |
1869 | goto error_splat_super; | |
1870 | } | |
f7b422b1 | 1871 | |
54ceac45 DH |
1872 | s->s_flags |= MS_ACTIVE; |
1873 | mnt->mnt_sb = s; | |
1874 | mnt->mnt_root = mntroot; | |
1875 | ||
1876 | dprintk("<-- nfs4_xdev_get_sb() = 0\n"); | |
1877 | return 0; | |
1878 | ||
1879 | out_err_nosb: | |
1880 | nfs_free_server(server); | |
1881 | out_err_noserver: | |
1882 | dprintk("<-- nfs4_xdev_get_sb() = %d [error]\n", error); | |
1883 | return error; | |
1884 | ||
1885 | error_splat_super: | |
1886 | up_write(&s->s_umount); | |
1887 | deactivate_super(s); | |
1888 | dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error); | |
1889 | return error; | |
f7b422b1 DH |
1890 | } |
1891 | ||
54ceac45 DH |
1892 | /* |
1893 | * Create an NFS4 server record on referral traversal | |
1894 | */ | |
1895 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, int flags, | |
1896 | const char *dev_name, void *raw_data, | |
1897 | struct vfsmount *mnt) | |
f7b422b1 DH |
1898 | { |
1899 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
1900 | struct super_block *s; |
1901 | struct nfs_server *server; | |
1902 | struct dentry *mntroot; | |
1903 | struct nfs_fh mntfh; | |
75180df2 | 1904 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1905 | struct nfs_sb_mountdata sb_mntdata = { |
1906 | .mntflags = flags, | |
1907 | }; | |
54ceac45 DH |
1908 | int error; |
1909 | ||
1910 | dprintk("--> nfs4_referral_get_sb()\n"); | |
1911 | ||
1912 | /* create a new volume representation */ | |
1913 | server = nfs4_create_referral_server(data, &mntfh); | |
1914 | if (IS_ERR(server)) { | |
1915 | error = PTR_ERR(server); | |
1916 | goto out_err_noserver; | |
1917 | } | |
e89a5a43 | 1918 | sb_mntdata.server = server; |
54ceac45 | 1919 | |
75180df2 TM |
1920 | if (server->flags & NFS4_MOUNT_UNSHARED) |
1921 | compare_super = NULL; | |
1922 | ||
54ceac45 | 1923 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1924 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
1925 | if (IS_ERR(s)) { |
1926 | error = PTR_ERR(s); | |
1927 | goto out_err_nosb; | |
1928 | } | |
1929 | ||
1930 | if (s->s_fs_info != server) { | |
1931 | nfs_free_server(server); | |
1932 | server = NULL; | |
1933 | } | |
1934 | ||
1935 | if (!s->s_root) { | |
1936 | /* initial superblock/root creation */ | |
54ceac45 DH |
1937 | nfs4_fill_super(s); |
1938 | } | |
1939 | ||
f2d0d85e | 1940 | mntroot = nfs4_get_root(s, &mntfh); |
54ceac45 DH |
1941 | if (IS_ERR(mntroot)) { |
1942 | error = PTR_ERR(mntroot); | |
1943 | goto error_splat_super; | |
1944 | } | |
1945 | ||
1946 | s->s_flags |= MS_ACTIVE; | |
1947 | mnt->mnt_sb = s; | |
1948 | mnt->mnt_root = mntroot; | |
1949 | ||
1950 | dprintk("<-- nfs4_referral_get_sb() = 0\n"); | |
1951 | return 0; | |
1952 | ||
1953 | out_err_nosb: | |
1954 | nfs_free_server(server); | |
1955 | out_err_noserver: | |
1956 | dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error); | |
1957 | return error; | |
1958 | ||
1959 | error_splat_super: | |
1960 | up_write(&s->s_umount); | |
1961 | deactivate_super(s); | |
1962 | dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error); | |
1963 | return error; | |
f7b422b1 DH |
1964 | } |
1965 | ||
54ceac45 | 1966 | #endif /* CONFIG_NFS_V4 */ |