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