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