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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 | * | |
526719ba | 8 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
f7b422b1 DH |
9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
10 | * | |
11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
12 | * J.S.Peatfield@damtp.cam.ac.uk | |
13 | * | |
14 | * Split from inode.c by David Howells <dhowells@redhat.com> | |
15 | * | |
54ceac45 DH |
16 | * - superblocks are indexed on server only - all inodes, dentries, etc. associated with a |
17 | * particular server are held in the same superblock | |
18 | * - NFS superblocks can have several effective roots to the dentry tree | |
19 | * - directory type roots are spliced into the tree when a path from one root reaches the root | |
20 | * of another (see nfs_lookup()) | |
f7b422b1 DH |
21 | */ |
22 | ||
f7b422b1 DH |
23 | #include <linux/module.h> |
24 | #include <linux/init.h> | |
25 | ||
26 | #include <linux/time.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/string.h> | |
30 | #include <linux/stat.h> | |
31 | #include <linux/errno.h> | |
32 | #include <linux/unistd.h> | |
33 | #include <linux/sunrpc/clnt.h> | |
34 | #include <linux/sunrpc/stats.h> | |
35 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 36 | #include <linux/sunrpc/xprtsock.h> |
2cf7ff7a | 37 | #include <linux/sunrpc/xprtrdma.h> |
f7b422b1 DH |
38 | #include <linux/nfs_fs.h> |
39 | #include <linux/nfs_mount.h> | |
40 | #include <linux/nfs4_mount.h> | |
41 | #include <linux/lockd/bind.h> | |
42 | #include <linux/smp_lock.h> | |
43 | #include <linux/seq_file.h> | |
44 | #include <linux/mount.h> | |
45 | #include <linux/nfs_idmap.h> | |
46 | #include <linux/vfs.h> | |
47 | #include <linux/inet.h> | |
fd00a8ff CL |
48 | #include <linux/in6.h> |
49 | #include <net/ipv6.h> | |
d8e7748a | 50 | #include <linux/netdevice.h> |
f7b422b1 | 51 | #include <linux/nfs_xdr.h> |
b5d5dfbd | 52 | #include <linux/magic.h> |
bf0fd768 | 53 | #include <linux/parser.h> |
f7b422b1 DH |
54 | |
55 | #include <asm/system.h> | |
56 | #include <asm/uaccess.h> | |
57 | ||
58 | #include "nfs4_fs.h" | |
59 | #include "callback.h" | |
60 | #include "delegation.h" | |
61 | #include "iostat.h" | |
62 | #include "internal.h" | |
08734048 | 63 | #include "fscache.h" |
f7b422b1 DH |
64 | |
65 | #define NFSDBG_FACILITY NFSDBG_VFS | |
66 | ||
bf0fd768 CL |
67 | enum { |
68 | /* Mount options that take no arguments */ | |
69 | Opt_soft, Opt_hard, | |
bf0fd768 CL |
70 | Opt_posix, Opt_noposix, |
71 | Opt_cto, Opt_nocto, | |
72 | Opt_ac, Opt_noac, | |
73 | Opt_lock, Opt_nolock, | |
74 | Opt_v2, Opt_v3, | |
2cf7ff7a | 75 | Opt_udp, Opt_tcp, Opt_rdma, |
bf0fd768 CL |
76 | Opt_acl, Opt_noacl, |
77 | Opt_rdirplus, Opt_nordirplus, | |
75180df2 | 78 | Opt_sharecache, Opt_nosharecache, |
d740351b | 79 | Opt_resvport, Opt_noresvport, |
b797cac7 | 80 | Opt_fscache, Opt_nofscache, |
bf0fd768 CL |
81 | |
82 | /* Mount options that take integer arguments */ | |
83 | Opt_port, | |
84 | Opt_rsize, Opt_wsize, Opt_bsize, | |
85 | Opt_timeo, Opt_retrans, | |
86 | Opt_acregmin, Opt_acregmax, | |
87 | Opt_acdirmin, Opt_acdirmax, | |
88 | Opt_actimeo, | |
89 | Opt_namelen, | |
90 | Opt_mountport, | |
e887cbcf | 91 | Opt_mountvers, |
ad879cef | 92 | Opt_nfsvers, |
bf0fd768 CL |
93 | |
94 | /* Mount options that take string arguments */ | |
33832034 | 95 | Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost, |
0ac83779 | 96 | Opt_addr, Opt_mountaddr, Opt_clientaddr, |
7973c1f1 | 97 | Opt_lookupcache, |
b797cac7 | 98 | Opt_fscache_uniq, |
bf0fd768 | 99 | |
f45663ce CL |
100 | /* Special mount options */ |
101 | Opt_userspace, Opt_deprecated, Opt_sloppy, | |
bf0fd768 CL |
102 | |
103 | Opt_err | |
104 | }; | |
105 | ||
a447c093 | 106 | static const match_table_t nfs_mount_option_tokens = { |
bf0fd768 CL |
107 | { Opt_userspace, "bg" }, |
108 | { Opt_userspace, "fg" }, | |
ecbb3845 CL |
109 | { Opt_userspace, "retry=%s" }, |
110 | ||
f45663ce CL |
111 | { Opt_sloppy, "sloppy" }, |
112 | ||
bf0fd768 CL |
113 | { Opt_soft, "soft" }, |
114 | { Opt_hard, "hard" }, | |
d33e4dfe CL |
115 | { Opt_deprecated, "intr" }, |
116 | { Opt_deprecated, "nointr" }, | |
bf0fd768 CL |
117 | { Opt_posix, "posix" }, |
118 | { Opt_noposix, "noposix" }, | |
119 | { Opt_cto, "cto" }, | |
120 | { Opt_nocto, "nocto" }, | |
121 | { Opt_ac, "ac" }, | |
122 | { Opt_noac, "noac" }, | |
123 | { Opt_lock, "lock" }, | |
124 | { Opt_nolock, "nolock" }, | |
125 | { Opt_v2, "v2" }, | |
126 | { Opt_v3, "v3" }, | |
127 | { Opt_udp, "udp" }, | |
128 | { Opt_tcp, "tcp" }, | |
2cf7ff7a | 129 | { Opt_rdma, "rdma" }, |
bf0fd768 CL |
130 | { Opt_acl, "acl" }, |
131 | { Opt_noacl, "noacl" }, | |
132 | { Opt_rdirplus, "rdirplus" }, | |
133 | { Opt_nordirplus, "nordirplus" }, | |
75180df2 TM |
134 | { Opt_sharecache, "sharecache" }, |
135 | { Opt_nosharecache, "nosharecache" }, | |
d740351b CL |
136 | { Opt_resvport, "resvport" }, |
137 | { Opt_noresvport, "noresvport" }, | |
b797cac7 DH |
138 | { Opt_fscache, "fsc" }, |
139 | { Opt_fscache_uniq, "fsc=%s" }, | |
140 | { Opt_nofscache, "nofsc" }, | |
bf0fd768 CL |
141 | |
142 | { Opt_port, "port=%u" }, | |
143 | { Opt_rsize, "rsize=%u" }, | |
144 | { Opt_wsize, "wsize=%u" }, | |
145 | { Opt_bsize, "bsize=%u" }, | |
146 | { Opt_timeo, "timeo=%u" }, | |
147 | { Opt_retrans, "retrans=%u" }, | |
148 | { Opt_acregmin, "acregmin=%u" }, | |
149 | { Opt_acregmax, "acregmax=%u" }, | |
150 | { Opt_acdirmin, "acdirmin=%u" }, | |
151 | { Opt_acdirmax, "acdirmax=%u" }, | |
152 | { Opt_actimeo, "actimeo=%u" }, | |
bf0fd768 CL |
153 | { Opt_namelen, "namlen=%u" }, |
154 | { Opt_mountport, "mountport=%u" }, | |
bf0fd768 | 155 | { Opt_mountvers, "mountvers=%u" }, |
bf0fd768 CL |
156 | { Opt_nfsvers, "nfsvers=%u" }, |
157 | { Opt_nfsvers, "vers=%u" }, | |
158 | ||
159 | { Opt_sec, "sec=%s" }, | |
160 | { Opt_proto, "proto=%s" }, | |
161 | { Opt_mountproto, "mountproto=%s" }, | |
162 | { Opt_addr, "addr=%s" }, | |
163 | { Opt_clientaddr, "clientaddr=%s" }, | |
33832034 | 164 | { Opt_mounthost, "mounthost=%s" }, |
0ac83779 | 165 | { Opt_mountaddr, "mountaddr=%s" }, |
bf0fd768 | 166 | |
7973c1f1 TM |
167 | { Opt_lookupcache, "lookupcache=%s" }, |
168 | ||
bf0fd768 CL |
169 | { Opt_err, NULL } |
170 | }; | |
171 | ||
172 | enum { | |
2cf7ff7a | 173 | Opt_xprt_udp, Opt_xprt_tcp, Opt_xprt_rdma, |
bf0fd768 CL |
174 | |
175 | Opt_xprt_err | |
176 | }; | |
177 | ||
a447c093 | 178 | static const match_table_t nfs_xprt_protocol_tokens = { |
bf0fd768 CL |
179 | { Opt_xprt_udp, "udp" }, |
180 | { Opt_xprt_tcp, "tcp" }, | |
2cf7ff7a | 181 | { Opt_xprt_rdma, "rdma" }, |
bf0fd768 CL |
182 | |
183 | { Opt_xprt_err, NULL } | |
184 | }; | |
185 | ||
186 | enum { | |
187 | Opt_sec_none, Opt_sec_sys, | |
188 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
189 | Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, | |
190 | Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, | |
191 | ||
192 | Opt_sec_err | |
193 | }; | |
194 | ||
a447c093 | 195 | static const match_table_t nfs_secflavor_tokens = { |
bf0fd768 CL |
196 | { Opt_sec_none, "none" }, |
197 | { Opt_sec_none, "null" }, | |
198 | { Opt_sec_sys, "sys" }, | |
199 | ||
200 | { Opt_sec_krb5, "krb5" }, | |
201 | { Opt_sec_krb5i, "krb5i" }, | |
202 | { Opt_sec_krb5p, "krb5p" }, | |
203 | ||
204 | { Opt_sec_lkey, "lkey" }, | |
205 | { Opt_sec_lkeyi, "lkeyi" }, | |
206 | { Opt_sec_lkeyp, "lkeyp" }, | |
207 | ||
8d042218 OK |
208 | { Opt_sec_spkm, "spkm3" }, |
209 | { Opt_sec_spkmi, "spkm3i" }, | |
210 | { Opt_sec_spkmp, "spkm3p" }, | |
211 | ||
bf0fd768 CL |
212 | { Opt_sec_err, NULL } |
213 | }; | |
214 | ||
7973c1f1 TM |
215 | enum { |
216 | Opt_lookupcache_all, Opt_lookupcache_positive, | |
217 | Opt_lookupcache_none, | |
218 | ||
219 | Opt_lookupcache_err | |
220 | }; | |
221 | ||
222 | static match_table_t nfs_lookupcache_tokens = { | |
223 | { Opt_lookupcache_all, "all" }, | |
224 | { Opt_lookupcache_positive, "pos" }, | |
225 | { Opt_lookupcache_positive, "positive" }, | |
226 | { Opt_lookupcache_none, "none" }, | |
227 | ||
228 | { Opt_lookupcache_err, NULL } | |
229 | }; | |
230 | ||
bf0fd768 | 231 | |
42faad99 | 232 | static void nfs_umount_begin(struct super_block *); |
816724e6 | 233 | static int nfs_statfs(struct dentry *, struct kstatfs *); |
f7b422b1 DH |
234 | static int nfs_show_options(struct seq_file *, struct vfsmount *); |
235 | static int nfs_show_stats(struct seq_file *, struct vfsmount *); | |
816724e6 | 236 | static int nfs_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *); |
54ceac45 | 237 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, |
816724e6 | 238 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); |
f7b422b1 | 239 | static void nfs_kill_super(struct super_block *); |
48b605f8 | 240 | static int nfs_remount(struct super_block *sb, int *flags, char *raw_data); |
f7b422b1 DH |
241 | |
242 | static struct file_system_type nfs_fs_type = { | |
243 | .owner = THIS_MODULE, | |
244 | .name = "nfs", | |
245 | .get_sb = nfs_get_sb, | |
246 | .kill_sb = nfs_kill_super, | |
349457cc | 247 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
248 | }; |
249 | ||
54ceac45 | 250 | struct file_system_type nfs_xdev_fs_type = { |
f7b422b1 DH |
251 | .owner = THIS_MODULE, |
252 | .name = "nfs", | |
54ceac45 | 253 | .get_sb = nfs_xdev_get_sb, |
f7b422b1 | 254 | .kill_sb = nfs_kill_super, |
349457cc | 255 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
256 | }; |
257 | ||
ee9b6d61 | 258 | static const struct super_operations nfs_sops = { |
f7b422b1 DH |
259 | .alloc_inode = nfs_alloc_inode, |
260 | .destroy_inode = nfs_destroy_inode, | |
261 | .write_inode = nfs_write_inode, | |
262 | .statfs = nfs_statfs, | |
263 | .clear_inode = nfs_clear_inode, | |
264 | .umount_begin = nfs_umount_begin, | |
265 | .show_options = nfs_show_options, | |
266 | .show_stats = nfs_show_stats, | |
48b605f8 | 267 | .remount_fs = nfs_remount, |
f7b422b1 DH |
268 | }; |
269 | ||
270 | #ifdef CONFIG_NFS_V4 | |
816724e6 TM |
271 | static int nfs4_get_sb(struct file_system_type *fs_type, |
272 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
54ceac45 DH |
273 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, |
274 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
275 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, | |
276 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
f7b422b1 DH |
277 | static void nfs4_kill_super(struct super_block *sb); |
278 | ||
279 | static struct file_system_type nfs4_fs_type = { | |
280 | .owner = THIS_MODULE, | |
281 | .name = "nfs4", | |
282 | .get_sb = nfs4_get_sb, | |
283 | .kill_sb = nfs4_kill_super, | |
349457cc | 284 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
285 | }; |
286 | ||
54ceac45 | 287 | struct file_system_type nfs4_xdev_fs_type = { |
f7b422b1 DH |
288 | .owner = THIS_MODULE, |
289 | .name = "nfs4", | |
54ceac45 | 290 | .get_sb = nfs4_xdev_get_sb, |
f7b422b1 | 291 | .kill_sb = nfs4_kill_super, |
349457cc | 292 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
293 | }; |
294 | ||
54ceac45 | 295 | struct file_system_type nfs4_referral_fs_type = { |
f7b422b1 DH |
296 | .owner = THIS_MODULE, |
297 | .name = "nfs4", | |
54ceac45 | 298 | .get_sb = nfs4_referral_get_sb, |
f7b422b1 | 299 | .kill_sb = nfs4_kill_super, |
349457cc | 300 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
301 | }; |
302 | ||
ee9b6d61 | 303 | static const struct super_operations nfs4_sops = { |
f7b422b1 DH |
304 | .alloc_inode = nfs_alloc_inode, |
305 | .destroy_inode = nfs_destroy_inode, | |
306 | .write_inode = nfs_write_inode, | |
307 | .statfs = nfs_statfs, | |
308 | .clear_inode = nfs4_clear_inode, | |
309 | .umount_begin = nfs_umount_begin, | |
310 | .show_options = nfs_show_options, | |
311 | .show_stats = nfs_show_stats, | |
48b605f8 | 312 | .remount_fs = nfs_remount, |
f7b422b1 DH |
313 | }; |
314 | #endif | |
315 | ||
8e1f936b RR |
316 | static struct shrinker acl_shrinker = { |
317 | .shrink = nfs_access_cache_shrinker, | |
318 | .seeks = DEFAULT_SEEKS, | |
319 | }; | |
979df72e | 320 | |
f7b422b1 DH |
321 | /* |
322 | * Register the NFS filesystems | |
323 | */ | |
324 | int __init register_nfs_fs(void) | |
325 | { | |
326 | int ret; | |
327 | ||
328 | ret = register_filesystem(&nfs_fs_type); | |
329 | if (ret < 0) | |
330 | goto error_0; | |
331 | ||
f7b422b1 DH |
332 | ret = nfs_register_sysctl(); |
333 | if (ret < 0) | |
334 | goto error_1; | |
89a09141 | 335 | #ifdef CONFIG_NFS_V4 |
f7b422b1 DH |
336 | ret = register_filesystem(&nfs4_fs_type); |
337 | if (ret < 0) | |
338 | goto error_2; | |
339 | #endif | |
8e1f936b | 340 | register_shrinker(&acl_shrinker); |
f7b422b1 DH |
341 | return 0; |
342 | ||
343 | #ifdef CONFIG_NFS_V4 | |
344 | error_2: | |
345 | nfs_unregister_sysctl(); | |
89a09141 | 346 | #endif |
f7b422b1 DH |
347 | error_1: |
348 | unregister_filesystem(&nfs_fs_type); | |
f7b422b1 DH |
349 | error_0: |
350 | return ret; | |
351 | } | |
352 | ||
353 | /* | |
354 | * Unregister the NFS filesystems | |
355 | */ | |
356 | void __exit unregister_nfs_fs(void) | |
357 | { | |
8e1f936b | 358 | unregister_shrinker(&acl_shrinker); |
f7b422b1 DH |
359 | #ifdef CONFIG_NFS_V4 |
360 | unregister_filesystem(&nfs4_fs_type); | |
f7b422b1 | 361 | #endif |
49af7ee1 | 362 | nfs_unregister_sysctl(); |
f7b422b1 DH |
363 | unregister_filesystem(&nfs_fs_type); |
364 | } | |
365 | ||
1daef0a8 | 366 | void nfs_sb_active(struct super_block *sb) |
ef818a28 | 367 | { |
1daef0a8 | 368 | struct nfs_server *server = NFS_SB(sb); |
ef818a28 | 369 | |
1daef0a8 TM |
370 | if (atomic_inc_return(&server->active) == 1) |
371 | atomic_inc(&sb->s_active); | |
ef818a28 SD |
372 | } |
373 | ||
1daef0a8 | 374 | void nfs_sb_deactive(struct super_block *sb) |
ef818a28 SD |
375 | { |
376 | struct nfs_server *server = NFS_SB(sb); | |
1daef0a8 TM |
377 | |
378 | if (atomic_dec_and_test(&server->active)) | |
379 | deactivate_super(sb); | |
ef818a28 SD |
380 | } |
381 | ||
f7b422b1 DH |
382 | /* |
383 | * Deliver file system statistics to userspace | |
384 | */ | |
816724e6 | 385 | static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
f7b422b1 | 386 | { |
0c7d90cf | 387 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
f7b422b1 DH |
388 | unsigned char blockbits; |
389 | unsigned long blockres; | |
0c7d90cf | 390 | struct nfs_fh *fh = NFS_FH(dentry->d_inode); |
f7b422b1 DH |
391 | struct nfs_fattr fattr; |
392 | struct nfs_fsstat res = { | |
393 | .fattr = &fattr, | |
394 | }; | |
395 | int error; | |
396 | ||
8fa5c000 | 397 | error = server->nfs_client->rpc_ops->statfs(server, fh, &res); |
f7b422b1 DH |
398 | if (error < 0) |
399 | goto out_err; | |
1a0ba9ae | 400 | buf->f_type = NFS_SUPER_MAGIC; |
f7b422b1 DH |
401 | |
402 | /* | |
403 | * Current versions of glibc do not correctly handle the | |
404 | * case where f_frsize != f_bsize. Eventually we want to | |
405 | * report the value of wtmult in this field. | |
406 | */ | |
0c7d90cf | 407 | buf->f_frsize = dentry->d_sb->s_blocksize; |
f7b422b1 DH |
408 | |
409 | /* | |
410 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
411 | * are reported in units of f_frsize. Linux hasn't had | |
412 | * an f_frsize field in its statfs struct until recently, | |
413 | * thus historically Linux's sys_statfs reports these | |
414 | * fields in units of f_bsize. | |
415 | */ | |
0c7d90cf DH |
416 | buf->f_bsize = dentry->d_sb->s_blocksize; |
417 | blockbits = dentry->d_sb->s_blocksize_bits; | |
f7b422b1 DH |
418 | blockres = (1 << blockbits) - 1; |
419 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
420 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
421 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
422 | ||
423 | buf->f_files = res.tfiles; | |
424 | buf->f_ffree = res.afiles; | |
425 | ||
426 | buf->f_namelen = server->namelen; | |
1a0ba9ae | 427 | |
f7b422b1 DH |
428 | return 0; |
429 | ||
430 | out_err: | |
3110ff80 | 431 | dprintk("%s: statfs error = %d\n", __func__, -error); |
1a0ba9ae | 432 | return error; |
f7b422b1 DH |
433 | } |
434 | ||
7d4e2747 DH |
435 | /* |
436 | * Map the security flavour number to a name | |
437 | */ | |
81039f1f TM |
438 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
439 | { | |
7d4e2747 | 440 | static const struct { |
81039f1f TM |
441 | rpc_authflavor_t flavour; |
442 | const char *str; | |
443 | } sec_flavours[] = { | |
444 | { RPC_AUTH_NULL, "null" }, | |
445 | { RPC_AUTH_UNIX, "sys" }, | |
446 | { RPC_AUTH_GSS_KRB5, "krb5" }, | |
447 | { RPC_AUTH_GSS_KRB5I, "krb5i" }, | |
448 | { RPC_AUTH_GSS_KRB5P, "krb5p" }, | |
449 | { RPC_AUTH_GSS_LKEY, "lkey" }, | |
450 | { RPC_AUTH_GSS_LKEYI, "lkeyi" }, | |
451 | { RPC_AUTH_GSS_LKEYP, "lkeyp" }, | |
452 | { RPC_AUTH_GSS_SPKM, "spkm" }, | |
453 | { RPC_AUTH_GSS_SPKMI, "spkmi" }, | |
454 | { RPC_AUTH_GSS_SPKMP, "spkmp" }, | |
4d81cd16 | 455 | { UINT_MAX, "unknown" } |
81039f1f TM |
456 | }; |
457 | int i; | |
458 | ||
4d81cd16 | 459 | for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) { |
81039f1f TM |
460 | if (sec_flavours[i].flavour == flavour) |
461 | break; | |
462 | } | |
463 | return sec_flavours[i].str; | |
464 | } | |
465 | ||
82d101d5 CL |
466 | static void nfs_show_mountd_options(struct seq_file *m, struct nfs_server *nfss, |
467 | int showdefaults) | |
468 | { | |
469 | struct sockaddr *sap = (struct sockaddr *)&nfss->mountd_address; | |
470 | ||
471 | switch (sap->sa_family) { | |
472 | case AF_INET: { | |
473 | struct sockaddr_in *sin = (struct sockaddr_in *)sap; | |
be859405 | 474 | seq_printf(m, ",mountaddr=%pI4", &sin->sin_addr.s_addr); |
82d101d5 CL |
475 | break; |
476 | } | |
477 | case AF_INET6: { | |
478 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
5b095d98 | 479 | seq_printf(m, ",mountaddr=%pI6", &sin6->sin6_addr); |
82d101d5 CL |
480 | break; |
481 | } | |
482 | default: | |
483 | if (showdefaults) | |
484 | seq_printf(m, ",mountaddr=unspecified"); | |
485 | } | |
486 | ||
487 | if (nfss->mountd_version || showdefaults) | |
488 | seq_printf(m, ",mountvers=%u", nfss->mountd_version); | |
489 | if (nfss->mountd_port || showdefaults) | |
490 | seq_printf(m, ",mountport=%u", nfss->mountd_port); | |
491 | ||
492 | switch (nfss->mountd_protocol) { | |
493 | case IPPROTO_UDP: | |
494 | seq_printf(m, ",mountproto=udp"); | |
495 | break; | |
496 | case IPPROTO_TCP: | |
497 | seq_printf(m, ",mountproto=tcp"); | |
498 | break; | |
499 | default: | |
500 | if (showdefaults) | |
501 | seq_printf(m, ",mountproto=auto"); | |
502 | } | |
503 | } | |
504 | ||
f7b422b1 DH |
505 | /* |
506 | * Describe the mount options in force on this server representation | |
507 | */ | |
82d101d5 CL |
508 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, |
509 | int showdefaults) | |
f7b422b1 | 510 | { |
509de811 | 511 | static const struct proc_nfs_info { |
f7b422b1 | 512 | int flag; |
509de811 DH |
513 | const char *str; |
514 | const char *nostr; | |
f7b422b1 DH |
515 | } nfs_info[] = { |
516 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, | |
82d101d5 CL |
517 | { NFS_MOUNT_INTR, ",intr", ",nointr" }, |
518 | { NFS_MOUNT_POSIX, ",posix", "" }, | |
f7b422b1 DH |
519 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
520 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
521 | { NFS_MOUNT_NONLM, ",nolock", "" }, | |
522 | { NFS_MOUNT_NOACL, ",noacl", "" }, | |
74dd34e6 | 523 | { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" }, |
d740351b CL |
524 | { NFS_MOUNT_UNSHARED, ",nosharecache", "" }, |
525 | { NFS_MOUNT_NORESVPORT, ",noresvport", "" }, | |
f7b422b1 DH |
526 | { 0, NULL, NULL } |
527 | }; | |
509de811 | 528 | const struct proc_nfs_info *nfs_infop; |
8fa5c000 | 529 | struct nfs_client *clp = nfss->nfs_client; |
82d101d5 | 530 | u32 version = clp->rpc_ops->version; |
f7b422b1 | 531 | |
82d101d5 | 532 | seq_printf(m, ",vers=%u", version); |
2d767432 CL |
533 | seq_printf(m, ",rsize=%u", nfss->rsize); |
534 | seq_printf(m, ",wsize=%u", nfss->wsize); | |
82d101d5 CL |
535 | if (nfss->bsize != 0) |
536 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
537 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
0e0cab74 | 538 | if (nfss->acregmin != NFS_DEF_ACREGMIN*HZ || showdefaults) |
2d767432 | 539 | seq_printf(m, ",acregmin=%u", nfss->acregmin/HZ); |
0e0cab74 | 540 | if (nfss->acregmax != NFS_DEF_ACREGMAX*HZ || showdefaults) |
2d767432 | 541 | seq_printf(m, ",acregmax=%u", nfss->acregmax/HZ); |
0e0cab74 | 542 | if (nfss->acdirmin != NFS_DEF_ACDIRMIN*HZ || showdefaults) |
2d767432 | 543 | seq_printf(m, ",acdirmin=%u", nfss->acdirmin/HZ); |
0e0cab74 | 544 | if (nfss->acdirmax != NFS_DEF_ACDIRMAX*HZ || showdefaults) |
2d767432 | 545 | seq_printf(m, ",acdirmax=%u", nfss->acdirmax/HZ); |
f7b422b1 DH |
546 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { |
547 | if (nfss->flags & nfs_infop->flag) | |
548 | seq_puts(m, nfs_infop->str); | |
549 | else | |
550 | seq_puts(m, nfs_infop->nostr); | |
551 | } | |
56928edd TT |
552 | seq_printf(m, ",proto=%s", |
553 | rpc_peeraddr2str(nfss->client, RPC_DISPLAY_PROTO)); | |
82d101d5 CL |
554 | if (version == 4) { |
555 | if (nfss->port != NFS_PORT) | |
556 | seq_printf(m, ",port=%u", nfss->port); | |
557 | } else | |
558 | if (nfss->port) | |
559 | seq_printf(m, ",port=%u", nfss->port); | |
560 | ||
33170233 TM |
561 | seq_printf(m, ",timeo=%lu", 10U * nfss->client->cl_timeout->to_initval / HZ); |
562 | seq_printf(m, ",retrans=%u", nfss->client->cl_timeout->to_retries); | |
81039f1f | 563 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
82d101d5 CL |
564 | |
565 | if (version != 4) | |
566 | nfs_show_mountd_options(m, nfss, showdefaults); | |
567 | ||
568 | #ifdef CONFIG_NFS_V4 | |
569 | if (clp->rpc_ops->version == 4) | |
570 | seq_printf(m, ",clientaddr=%s", clp->cl_ipaddr); | |
571 | #endif | |
b797cac7 DH |
572 | if (nfss->options & NFS_OPTION_FSCACHE) |
573 | seq_printf(m, ",fsc"); | |
f7b422b1 DH |
574 | } |
575 | ||
576 | /* | |
577 | * Describe the mount options on this VFS mountpoint | |
578 | */ | |
579 | static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) | |
580 | { | |
581 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
582 | ||
583 | nfs_show_mount_options(m, nfss, 0); | |
584 | ||
5d8515ca CL |
585 | seq_printf(m, ",addr=%s", |
586 | rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient, | |
587 | RPC_DISPLAY_ADDR)); | |
f7b422b1 DH |
588 | |
589 | return 0; | |
590 | } | |
591 | ||
592 | /* | |
593 | * Present statistical information for this VFS mountpoint | |
594 | */ | |
595 | static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) | |
596 | { | |
597 | int i, cpu; | |
598 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
599 | struct rpc_auth *auth = nfss->client->cl_auth; | |
600 | struct nfs_iostats totals = { }; | |
601 | ||
602 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
603 | ||
604 | /* | |
605 | * Display all mount option settings | |
606 | */ | |
607 | seq_printf(m, "\n\topts:\t"); | |
608 | seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw"); | |
609 | seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); | |
610 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : ""); | |
611 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); | |
612 | nfs_show_mount_options(m, nfss, 1); | |
613 | ||
614 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); | |
615 | ||
616 | seq_printf(m, "\n\tcaps:\t"); | |
617 | seq_printf(m, "caps=0x%x", nfss->caps); | |
2d767432 CL |
618 | seq_printf(m, ",wtmult=%u", nfss->wtmult); |
619 | seq_printf(m, ",dtsize=%u", nfss->dtsize); | |
620 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
621 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
f7b422b1 DH |
622 | |
623 | #ifdef CONFIG_NFS_V4 | |
40c55319 | 624 | if (nfss->nfs_client->rpc_ops->version == 4) { |
f7b422b1 DH |
625 | seq_printf(m, "\n\tnfsv4:\t"); |
626 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); | |
627 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
628 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); | |
629 | } | |
630 | #endif | |
631 | ||
632 | /* | |
633 | * Display security flavor in effect for this mount | |
634 | */ | |
2d767432 | 635 | seq_printf(m, "\n\tsec:\tflavor=%u", auth->au_ops->au_flavor); |
f7b422b1 | 636 | if (auth->au_flavor) |
2d767432 | 637 | seq_printf(m, ",pseudoflavor=%u", auth->au_flavor); |
f7b422b1 DH |
638 | |
639 | /* | |
640 | * Display superblock I/O counters | |
641 | */ | |
642 | for_each_possible_cpu(cpu) { | |
643 | struct nfs_iostats *stats; | |
644 | ||
645 | preempt_disable(); | |
646 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
647 | ||
648 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
649 | totals.events[i] += stats->events[i]; | |
650 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
651 | totals.bytes[i] += stats->bytes[i]; | |
6a51091d DH |
652 | #ifdef CONFIG_NFS_FSCACHE |
653 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
654 | totals.fscache[i] += stats->fscache[i]; | |
655 | #endif | |
f7b422b1 DH |
656 | |
657 | preempt_enable(); | |
658 | } | |
659 | ||
660 | seq_printf(m, "\n\tevents:\t"); | |
661 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
662 | seq_printf(m, "%lu ", totals.events[i]); | |
663 | seq_printf(m, "\n\tbytes:\t"); | |
664 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
665 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
6a51091d DH |
666 | #ifdef CONFIG_NFS_FSCACHE |
667 | if (nfss->options & NFS_OPTION_FSCACHE) { | |
668 | seq_printf(m, "\n\tfsc:\t"); | |
669 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
670 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
671 | } | |
672 | #endif | |
f7b422b1 DH |
673 | seq_printf(m, "\n"); |
674 | ||
675 | rpc_print_iostats(m, nfss->client); | |
676 | ||
677 | return 0; | |
678 | } | |
679 | ||
680 | /* | |
681 | * Begin unmount by attempting to remove all automounted mountpoints we added | |
54ceac45 | 682 | * in response to xdev traversals and referrals |
f7b422b1 | 683 | */ |
42faad99 | 684 | static void nfs_umount_begin(struct super_block *sb) |
f7b422b1 | 685 | { |
42faad99 | 686 | struct nfs_server *server = NFS_SB(sb); |
fc6ae3cf TM |
687 | struct rpc_clnt *rpc; |
688 | ||
fc6ae3cf TM |
689 | /* -EIO all pending I/O */ |
690 | rpc = server->client_acl; | |
691 | if (!IS_ERR(rpc)) | |
692 | rpc_killall_tasks(rpc); | |
693 | rpc = server->client; | |
694 | if (!IS_ERR(rpc)) | |
695 | rpc_killall_tasks(rpc); | |
f7b422b1 DH |
696 | } |
697 | ||
fc50d58f | 698 | /* |
cdcd7f9a CL |
699 | * Sanity-check a server address provided by the mount command. |
700 | * | |
701 | * Address family must be initialized, and address must not be | |
702 | * the ANY address for that family. | |
fc50d58f CL |
703 | */ |
704 | static int nfs_verify_server_address(struct sockaddr *addr) | |
705 | { | |
706 | switch (addr->sa_family) { | |
707 | case AF_INET: { | |
cdcd7f9a | 708 | struct sockaddr_in *sa = (struct sockaddr_in *)addr; |
e6f1cebf | 709 | return sa->sin_addr.s_addr != htonl(INADDR_ANY); |
cdcd7f9a CL |
710 | } |
711 | case AF_INET6: { | |
712 | struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr; | |
713 | return !ipv6_addr_any(sa); | |
fc50d58f CL |
714 | } |
715 | } | |
716 | ||
717 | return 0; | |
718 | } | |
719 | ||
ce3b7e19 CL |
720 | static void nfs_parse_ipv4_address(char *string, size_t str_len, |
721 | struct sockaddr *sap, size_t *addr_len) | |
9412b927 | 722 | { |
ce3b7e19 CL |
723 | struct sockaddr_in *sin = (struct sockaddr_in *)sap; |
724 | u8 *addr = (u8 *)&sin->sin_addr.s_addr; | |
9412b927 | 725 | |
ce3b7e19 CL |
726 | if (str_len <= INET_ADDRSTRLEN) { |
727 | dfprintk(MOUNT, "NFS: parsing IPv4 address %*s\n", | |
728 | (int)str_len, string); | |
729 | ||
730 | sin->sin_family = AF_INET; | |
731 | *addr_len = sizeof(*sin); | |
732 | if (in4_pton(string, str_len, addr, '\0', NULL)) | |
3c7c7e48 | 733 | return; |
ce3b7e19 CL |
734 | } |
735 | ||
736 | sap->sa_family = AF_UNSPEC; | |
737 | *addr_len = 0; | |
738 | } | |
739 | ||
740 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
5e2e7721 CL |
741 | static int nfs_parse_ipv6_scope_id(const char *string, const size_t str_len, |
742 | const char *delim, | |
743 | struct sockaddr_in6 *sin6) | |
d8e7748a CL |
744 | { |
745 | char *p; | |
746 | size_t len; | |
747 | ||
5e2e7721 CL |
748 | if ((string + str_len) == delim) |
749 | return 1; | |
750 | ||
d8e7748a | 751 | if (*delim != IPV6_SCOPE_DELIMITER) |
5e2e7721 CL |
752 | return 0; |
753 | ||
754 | if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)) | |
755 | return 0; | |
d8e7748a CL |
756 | |
757 | len = (string + str_len) - delim - 1; | |
758 | p = kstrndup(delim + 1, len, GFP_KERNEL); | |
759 | if (p) { | |
760 | unsigned long scope_id = 0; | |
761 | struct net_device *dev; | |
762 | ||
763 | dev = dev_get_by_name(&init_net, p); | |
764 | if (dev != NULL) { | |
765 | scope_id = dev->ifindex; | |
766 | dev_put(dev); | |
767 | } else { | |
5e2e7721 CL |
768 | if (strict_strtoul(p, 10, &scope_id) == 0) { |
769 | kfree(p); | |
770 | return 0; | |
771 | } | |
d8e7748a CL |
772 | } |
773 | ||
774 | kfree(p); | |
5e2e7721 | 775 | |
d8e7748a CL |
776 | sin6->sin6_scope_id = scope_id; |
777 | dfprintk(MOUNT, "NFS: IPv6 scope ID = %lu\n", scope_id); | |
5e2e7721 | 778 | return 1; |
d8e7748a | 779 | } |
5e2e7721 CL |
780 | |
781 | return 0; | |
d8e7748a CL |
782 | } |
783 | ||
ce3b7e19 CL |
784 | static void nfs_parse_ipv6_address(char *string, size_t str_len, |
785 | struct sockaddr *sap, size_t *addr_len) | |
786 | { | |
787 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
788 | u8 *addr = (u8 *)&sin6->sin6_addr.in6_u; | |
d8e7748a | 789 | const char *delim; |
ce3b7e19 CL |
790 | |
791 | if (str_len <= INET6_ADDRSTRLEN) { | |
792 | dfprintk(MOUNT, "NFS: parsing IPv6 address %*s\n", | |
793 | (int)str_len, string); | |
3c7c7e48 | 794 | |
ce3b7e19 CL |
795 | sin6->sin6_family = AF_INET6; |
796 | *addr_len = sizeof(*sin6); | |
5e2e7721 CL |
797 | if (in6_pton(string, str_len, addr, |
798 | IPV6_SCOPE_DELIMITER, &delim) != 0) { | |
799 | if (nfs_parse_ipv6_scope_id(string, str_len, | |
800 | delim, sin6) != 0) | |
801 | return; | |
d8e7748a | 802 | } |
3c7c7e48 | 803 | } |
9412b927 CL |
804 | |
805 | sap->sa_family = AF_UNSPEC; | |
ce3b7e19 CL |
806 | *addr_len = 0; |
807 | } | |
808 | #else | |
809 | static void nfs_parse_ipv6_address(char *string, size_t str_len, | |
810 | struct sockaddr *sap, size_t *addr_len) | |
811 | { | |
812 | sap->sa_family = AF_UNSPEC; | |
813 | *addr_len = 0; | |
814 | } | |
815 | #endif | |
816 | ||
817 | /* | |
818 | * Construct a sockaddr based on the contents of a string that contains | |
819 | * an IP address in presentation format. | |
820 | * | |
821 | * If there is a problem constructing the new sockaddr, set the address | |
822 | * family to AF_UNSPEC. | |
823 | */ | |
ea31a443 | 824 | void nfs_parse_ip_address(char *string, size_t str_len, |
ce3b7e19 CL |
825 | struct sockaddr *sap, size_t *addr_len) |
826 | { | |
827 | unsigned int i, colons; | |
828 | ||
829 | colons = 0; | |
830 | for (i = 0; i < str_len; i++) | |
831 | if (string[i] == ':') | |
832 | colons++; | |
833 | ||
834 | if (colons >= 2) | |
835 | nfs_parse_ipv6_address(string, str_len, sap, addr_len); | |
836 | else | |
837 | nfs_parse_ipv4_address(string, str_len, sap, addr_len); | |
9412b927 CL |
838 | } |
839 | ||
259875ef TM |
840 | /* |
841 | * Sanity check the NFS transport protocol. | |
842 | * | |
843 | */ | |
844 | static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
845 | { | |
846 | switch (mnt->nfs_server.protocol) { | |
847 | case XPRT_TRANSPORT_UDP: | |
848 | case XPRT_TRANSPORT_TCP: | |
849 | case XPRT_TRANSPORT_RDMA: | |
850 | break; | |
851 | default: | |
852 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; | |
853 | } | |
854 | } | |
855 | ||
856 | /* | |
857 | * For text based NFSv2/v3 mounts, the mount protocol transport default | |
858 | * settings should depend upon the specified NFS transport. | |
859 | */ | |
860 | static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
861 | { | |
862 | nfs_validate_transport_protocol(mnt); | |
863 | ||
864 | if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP || | |
865 | mnt->mount_server.protocol == XPRT_TRANSPORT_TCP) | |
866 | return; | |
867 | switch (mnt->nfs_server.protocol) { | |
868 | case XPRT_TRANSPORT_UDP: | |
869 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; | |
870 | break; | |
871 | case XPRT_TRANSPORT_TCP: | |
872 | case XPRT_TRANSPORT_RDMA: | |
873 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; | |
874 | } | |
875 | } | |
876 | ||
01060c89 CL |
877 | /* |
878 | * Parse the value of the 'sec=' option. | |
879 | * | |
dd07c947 | 880 | * The flavor_len setting is for v4 mounts. |
01060c89 CL |
881 | */ |
882 | static int nfs_parse_security_flavors(char *value, | |
883 | struct nfs_parsed_mount_data *mnt) | |
884 | { | |
885 | substring_t args[MAX_OPT_ARGS]; | |
886 | ||
887 | dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); | |
888 | ||
889 | switch (match_token(value, nfs_secflavor_tokens, args)) { | |
890 | case Opt_sec_none: | |
01060c89 CL |
891 | mnt->auth_flavor_len = 0; |
892 | mnt->auth_flavors[0] = RPC_AUTH_NULL; | |
893 | break; | |
894 | case Opt_sec_sys: | |
01060c89 CL |
895 | mnt->auth_flavor_len = 0; |
896 | mnt->auth_flavors[0] = RPC_AUTH_UNIX; | |
897 | break; | |
898 | case Opt_sec_krb5: | |
01060c89 CL |
899 | mnt->auth_flavor_len = 1; |
900 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5; | |
901 | break; | |
902 | case Opt_sec_krb5i: | |
01060c89 CL |
903 | mnt->auth_flavor_len = 1; |
904 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I; | |
905 | break; | |
906 | case Opt_sec_krb5p: | |
01060c89 CL |
907 | mnt->auth_flavor_len = 1; |
908 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P; | |
909 | break; | |
910 | case Opt_sec_lkey: | |
01060c89 CL |
911 | mnt->auth_flavor_len = 1; |
912 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY; | |
913 | break; | |
914 | case Opt_sec_lkeyi: | |
01060c89 CL |
915 | mnt->auth_flavor_len = 1; |
916 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI; | |
917 | break; | |
918 | case Opt_sec_lkeyp: | |
01060c89 CL |
919 | mnt->auth_flavor_len = 1; |
920 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP; | |
921 | break; | |
922 | case Opt_sec_spkm: | |
01060c89 CL |
923 | mnt->auth_flavor_len = 1; |
924 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM; | |
925 | break; | |
926 | case Opt_sec_spkmi: | |
01060c89 CL |
927 | mnt->auth_flavor_len = 1; |
928 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI; | |
929 | break; | |
930 | case Opt_sec_spkmp: | |
01060c89 CL |
931 | mnt->auth_flavor_len = 1; |
932 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP; | |
933 | break; | |
934 | default: | |
935 | return 0; | |
936 | } | |
937 | ||
938 | return 1; | |
939 | } | |
940 | ||
f45663ce CL |
941 | static void nfs_parse_invalid_value(const char *option) |
942 | { | |
943 | dfprintk(MOUNT, "NFS: bad value specified for %s option\n", option); | |
944 | } | |
945 | ||
bf0fd768 CL |
946 | /* |
947 | * Error-check and convert a string of mount options from user space into | |
f45663ce CL |
948 | * a data structure. The whole mount string is processed; bad options are |
949 | * skipped as they are encountered. If there were no errors, return 1; | |
950 | * otherwise return 0 (zero). | |
bf0fd768 CL |
951 | */ |
952 | static int nfs_parse_mount_options(char *raw, | |
953 | struct nfs_parsed_mount_data *mnt) | |
954 | { | |
f9c3a380 | 955 | char *p, *string, *secdata; |
f45663ce | 956 | int rc, sloppy = 0, errors = 0; |
bf0fd768 CL |
957 | |
958 | if (!raw) { | |
959 | dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); | |
960 | return 1; | |
961 | } | |
962 | dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); | |
963 | ||
f9c3a380 EP |
964 | secdata = alloc_secdata(); |
965 | if (!secdata) | |
966 | goto out_nomem; | |
967 | ||
968 | rc = security_sb_copy_data(raw, secdata); | |
969 | if (rc) | |
970 | goto out_security_failure; | |
971 | ||
972 | rc = security_sb_parse_opts_str(secdata, &mnt->lsm_opts); | |
973 | if (rc) | |
974 | goto out_security_failure; | |
975 | ||
976 | free_secdata(secdata); | |
977 | ||
bf0fd768 CL |
978 | while ((p = strsep(&raw, ",")) != NULL) { |
979 | substring_t args[MAX_OPT_ARGS]; | |
980 | int option, token; | |
981 | ||
982 | if (!*p) | |
983 | continue; | |
984 | ||
985 | dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); | |
986 | ||
987 | token = match_token(p, nfs_mount_option_tokens, args); | |
988 | switch (token) { | |
f45663ce CL |
989 | |
990 | /* | |
991 | * boolean options: foo/nofoo | |
992 | */ | |
bf0fd768 CL |
993 | case Opt_soft: |
994 | mnt->flags |= NFS_MOUNT_SOFT; | |
995 | break; | |
996 | case Opt_hard: | |
997 | mnt->flags &= ~NFS_MOUNT_SOFT; | |
998 | break; | |
bf0fd768 CL |
999 | case Opt_posix: |
1000 | mnt->flags |= NFS_MOUNT_POSIX; | |
1001 | break; | |
1002 | case Opt_noposix: | |
1003 | mnt->flags &= ~NFS_MOUNT_POSIX; | |
1004 | break; | |
1005 | case Opt_cto: | |
1006 | mnt->flags &= ~NFS_MOUNT_NOCTO; | |
1007 | break; | |
1008 | case Opt_nocto: | |
1009 | mnt->flags |= NFS_MOUNT_NOCTO; | |
1010 | break; | |
1011 | case Opt_ac: | |
1012 | mnt->flags &= ~NFS_MOUNT_NOAC; | |
1013 | break; | |
1014 | case Opt_noac: | |
1015 | mnt->flags |= NFS_MOUNT_NOAC; | |
1016 | break; | |
1017 | case Opt_lock: | |
1018 | mnt->flags &= ~NFS_MOUNT_NONLM; | |
1019 | break; | |
1020 | case Opt_nolock: | |
1021 | mnt->flags |= NFS_MOUNT_NONLM; | |
1022 | break; | |
1023 | case Opt_v2: | |
1024 | mnt->flags &= ~NFS_MOUNT_VER3; | |
1025 | break; | |
1026 | case Opt_v3: | |
1027 | mnt->flags |= NFS_MOUNT_VER3; | |
1028 | break; | |
1029 | case Opt_udp: | |
1030 | mnt->flags &= ~NFS_MOUNT_TCP; | |
0896a725 | 1031 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 CL |
1032 | break; |
1033 | case Opt_tcp: | |
1034 | mnt->flags |= NFS_MOUNT_TCP; | |
0896a725 | 1035 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1036 | break; |
2cf7ff7a TT |
1037 | case Opt_rdma: |
1038 | mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ | |
1039 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 1040 | xprt_load_transport(p); |
2cf7ff7a | 1041 | break; |
bf0fd768 CL |
1042 | case Opt_acl: |
1043 | mnt->flags &= ~NFS_MOUNT_NOACL; | |
1044 | break; | |
1045 | case Opt_noacl: | |
1046 | mnt->flags |= NFS_MOUNT_NOACL; | |
1047 | break; | |
1048 | case Opt_rdirplus: | |
1049 | mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; | |
1050 | break; | |
1051 | case Opt_nordirplus: | |
1052 | mnt->flags |= NFS_MOUNT_NORDIRPLUS; | |
1053 | break; | |
75180df2 TM |
1054 | case Opt_sharecache: |
1055 | mnt->flags &= ~NFS_MOUNT_UNSHARED; | |
1056 | break; | |
1057 | case Opt_nosharecache: | |
1058 | mnt->flags |= NFS_MOUNT_UNSHARED; | |
1059 | break; | |
d740351b CL |
1060 | case Opt_resvport: |
1061 | mnt->flags &= ~NFS_MOUNT_NORESVPORT; | |
1062 | break; | |
1063 | case Opt_noresvport: | |
1064 | mnt->flags |= NFS_MOUNT_NORESVPORT; | |
1065 | break; | |
b797cac7 DH |
1066 | case Opt_fscache: |
1067 | mnt->options |= NFS_OPTION_FSCACHE; | |
1068 | kfree(mnt->fscache_uniq); | |
1069 | mnt->fscache_uniq = NULL; | |
1070 | break; | |
1071 | case Opt_nofscache: | |
1072 | mnt->options &= ~NFS_OPTION_FSCACHE; | |
1073 | kfree(mnt->fscache_uniq); | |
1074 | mnt->fscache_uniq = NULL; | |
1075 | break; | |
1076 | case Opt_fscache_uniq: | |
1077 | string = match_strdup(args); | |
1078 | if (!string) | |
1079 | goto out_nomem; | |
1080 | kfree(mnt->fscache_uniq); | |
1081 | mnt->fscache_uniq = string; | |
1082 | mnt->options |= NFS_OPTION_FSCACHE; | |
1083 | break; | |
bf0fd768 | 1084 | |
f45663ce CL |
1085 | /* |
1086 | * options that take numeric values | |
1087 | */ | |
bf0fd768 | 1088 | case Opt_port: |
f45663ce CL |
1089 | if (match_int(args, &option) || |
1090 | option < 0 || option > USHORT_MAX) { | |
1091 | errors++; | |
1092 | nfs_parse_invalid_value("port"); | |
1093 | } else | |
1094 | mnt->nfs_server.port = option; | |
bf0fd768 CL |
1095 | break; |
1096 | case Opt_rsize: | |
f45663ce CL |
1097 | if (match_int(args, &option) || option < 0) { |
1098 | errors++; | |
1099 | nfs_parse_invalid_value("rsize"); | |
1100 | } else | |
1101 | mnt->rsize = option; | |
bf0fd768 CL |
1102 | break; |
1103 | case Opt_wsize: | |
f45663ce CL |
1104 | if (match_int(args, &option) || option < 0) { |
1105 | errors++; | |
1106 | nfs_parse_invalid_value("wsize"); | |
1107 | } else | |
1108 | mnt->wsize = option; | |
bf0fd768 CL |
1109 | break; |
1110 | case Opt_bsize: | |
f45663ce CL |
1111 | if (match_int(args, &option) || option < 0) { |
1112 | errors++; | |
1113 | nfs_parse_invalid_value("bsize"); | |
1114 | } else | |
1115 | mnt->bsize = option; | |
bf0fd768 CL |
1116 | break; |
1117 | case Opt_timeo: | |
f45663ce CL |
1118 | if (match_int(args, &option) || option <= 0) { |
1119 | errors++; | |
1120 | nfs_parse_invalid_value("timeo"); | |
1121 | } else | |
1122 | mnt->timeo = option; | |
bf0fd768 CL |
1123 | break; |
1124 | case Opt_retrans: | |
f45663ce CL |
1125 | if (match_int(args, &option) || option <= 0) { |
1126 | errors++; | |
1127 | nfs_parse_invalid_value("retrans"); | |
1128 | } else | |
1129 | mnt->retrans = option; | |
bf0fd768 CL |
1130 | break; |
1131 | case Opt_acregmin: | |
f45663ce CL |
1132 | if (match_int(args, &option) || option < 0) { |
1133 | errors++; | |
1134 | nfs_parse_invalid_value("acregmin"); | |
1135 | } else | |
1136 | mnt->acregmin = option; | |
bf0fd768 CL |
1137 | break; |
1138 | case Opt_acregmax: | |
f45663ce CL |
1139 | if (match_int(args, &option) || option < 0) { |
1140 | errors++; | |
1141 | nfs_parse_invalid_value("acregmax"); | |
1142 | } else | |
1143 | mnt->acregmax = option; | |
bf0fd768 CL |
1144 | break; |
1145 | case Opt_acdirmin: | |
f45663ce CL |
1146 | if (match_int(args, &option) || option < 0) { |
1147 | errors++; | |
1148 | nfs_parse_invalid_value("acdirmin"); | |
1149 | } else | |
1150 | mnt->acdirmin = option; | |
bf0fd768 CL |
1151 | break; |
1152 | case Opt_acdirmax: | |
f45663ce CL |
1153 | if (match_int(args, &option) || option < 0) { |
1154 | errors++; | |
1155 | nfs_parse_invalid_value("acdirmax"); | |
1156 | } else | |
1157 | mnt->acdirmax = option; | |
bf0fd768 CL |
1158 | break; |
1159 | case Opt_actimeo: | |
f45663ce CL |
1160 | if (match_int(args, &option) || option < 0) { |
1161 | errors++; | |
1162 | nfs_parse_invalid_value("actimeo"); | |
1163 | } else | |
1164 | mnt->acregmin = mnt->acregmax = | |
1165 | mnt->acdirmin = mnt->acdirmax = option; | |
bf0fd768 CL |
1166 | break; |
1167 | case Opt_namelen: | |
f45663ce CL |
1168 | if (match_int(args, &option) || option < 0) { |
1169 | errors++; | |
1170 | nfs_parse_invalid_value("namlen"); | |
1171 | } else | |
1172 | mnt->namlen = option; | |
bf0fd768 CL |
1173 | break; |
1174 | case Opt_mountport: | |
f45663ce CL |
1175 | if (match_int(args, &option) || |
1176 | option < 0 || option > USHORT_MAX) { | |
1177 | errors++; | |
1178 | nfs_parse_invalid_value("mountport"); | |
1179 | } else | |
1180 | mnt->mount_server.port = option; | |
bf0fd768 | 1181 | break; |
bf0fd768 | 1182 | case Opt_mountvers: |
f45663ce CL |
1183 | if (match_int(args, &option) || |
1184 | option < NFS_MNT_VERSION || | |
1185 | option > NFS_MNT3_VERSION) { | |
1186 | errors++; | |
1187 | nfs_parse_invalid_value("mountvers"); | |
1188 | } else | |
1189 | mnt->mount_server.version = option; | |
bf0fd768 | 1190 | break; |
bf0fd768 | 1191 | case Opt_nfsvers: |
f45663ce CL |
1192 | if (match_int(args, &option)) { |
1193 | errors++; | |
1194 | nfs_parse_invalid_value("nfsvers"); | |
1195 | break; | |
1196 | } | |
bf0fd768 | 1197 | switch (option) { |
f45663ce | 1198 | case NFS2_VERSION: |
bf0fd768 CL |
1199 | mnt->flags &= ~NFS_MOUNT_VER3; |
1200 | break; | |
f45663ce | 1201 | case NFS3_VERSION: |
bf0fd768 CL |
1202 | mnt->flags |= NFS_MOUNT_VER3; |
1203 | break; | |
1204 | default: | |
f45663ce CL |
1205 | errors++; |
1206 | nfs_parse_invalid_value("nfsvers"); | |
bf0fd768 CL |
1207 | } |
1208 | break; | |
1209 | ||
f45663ce CL |
1210 | /* |
1211 | * options that take text values | |
1212 | */ | |
bf0fd768 CL |
1213 | case Opt_sec: |
1214 | string = match_strdup(args); | |
1215 | if (string == NULL) | |
1216 | goto out_nomem; | |
01060c89 | 1217 | rc = nfs_parse_security_flavors(string, mnt); |
bf0fd768 | 1218 | kfree(string); |
f45663ce CL |
1219 | if (!rc) { |
1220 | errors++; | |
1221 | dfprintk(MOUNT, "NFS: unrecognized " | |
1222 | "security flavor\n"); | |
1223 | } | |
bf0fd768 CL |
1224 | break; |
1225 | case Opt_proto: | |
1226 | string = match_strdup(args); | |
1227 | if (string == NULL) | |
1228 | goto out_nomem; | |
1229 | token = match_token(string, | |
1230 | nfs_xprt_protocol_tokens, args); | |
bf0fd768 CL |
1231 | |
1232 | switch (token) { | |
fdb66ff4 | 1233 | case Opt_xprt_udp: |
bf0fd768 | 1234 | mnt->flags &= ~NFS_MOUNT_TCP; |
0896a725 | 1235 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 | 1236 | break; |
fdb66ff4 | 1237 | case Opt_xprt_tcp: |
bf0fd768 | 1238 | mnt->flags |= NFS_MOUNT_TCP; |
0896a725 | 1239 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1240 | break; |
2cf7ff7a TT |
1241 | case Opt_xprt_rdma: |
1242 | /* vector side protocols to TCP */ | |
1243 | mnt->flags |= NFS_MOUNT_TCP; | |
1244 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 1245 | xprt_load_transport(string); |
2cf7ff7a | 1246 | break; |
bf0fd768 | 1247 | default: |
f45663ce CL |
1248 | errors++; |
1249 | dfprintk(MOUNT, "NFS: unrecognized " | |
1250 | "transport protocol\n"); | |
bf0fd768 | 1251 | } |
a67d18f8 | 1252 | kfree(string); |
bf0fd768 CL |
1253 | break; |
1254 | case Opt_mountproto: | |
1255 | string = match_strdup(args); | |
1256 | if (string == NULL) | |
1257 | goto out_nomem; | |
1258 | token = match_token(string, | |
1259 | nfs_xprt_protocol_tokens, args); | |
d508afb4 | 1260 | kfree(string); |
bf0fd768 CL |
1261 | |
1262 | switch (token) { | |
fdb66ff4 | 1263 | case Opt_xprt_udp: |
0896a725 | 1264 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 | 1265 | break; |
fdb66ff4 | 1266 | case Opt_xprt_tcp: |
0896a725 | 1267 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1268 | break; |
2cf7ff7a | 1269 | case Opt_xprt_rdma: /* not used for side protocols */ |
bf0fd768 | 1270 | default: |
f45663ce CL |
1271 | errors++; |
1272 | dfprintk(MOUNT, "NFS: unrecognized " | |
1273 | "transport protocol\n"); | |
bf0fd768 CL |
1274 | } |
1275 | break; | |
1276 | case Opt_addr: | |
1277 | string = match_strdup(args); | |
1278 | if (string == NULL) | |
1279 | goto out_nomem; | |
ce3b7e19 CL |
1280 | nfs_parse_ip_address(string, strlen(string), |
1281 | (struct sockaddr *) | |
1282 | &mnt->nfs_server.address, | |
1283 | &mnt->nfs_server.addrlen); | |
bf0fd768 CL |
1284 | kfree(string); |
1285 | break; | |
1286 | case Opt_clientaddr: | |
1287 | string = match_strdup(args); | |
1288 | if (string == NULL) | |
1289 | goto out_nomem; | |
fc601477 | 1290 | kfree(mnt->client_address); |
bf0fd768 CL |
1291 | mnt->client_address = string; |
1292 | break; | |
33832034 CL |
1293 | case Opt_mounthost: |
1294 | string = match_strdup(args); | |
1295 | if (string == NULL) | |
1296 | goto out_nomem; | |
fc601477 | 1297 | kfree(mnt->mount_server.hostname); |
33832034 CL |
1298 | mnt->mount_server.hostname = string; |
1299 | break; | |
0ac83779 | 1300 | case Opt_mountaddr: |
bf0fd768 CL |
1301 | string = match_strdup(args); |
1302 | if (string == NULL) | |
1303 | goto out_nomem; | |
ce3b7e19 CL |
1304 | nfs_parse_ip_address(string, strlen(string), |
1305 | (struct sockaddr *) | |
1306 | &mnt->mount_server.address, | |
1307 | &mnt->mount_server.addrlen); | |
bf0fd768 CL |
1308 | kfree(string); |
1309 | break; | |
7973c1f1 TM |
1310 | case Opt_lookupcache: |
1311 | string = match_strdup(args); | |
1312 | if (string == NULL) | |
1313 | goto out_nomem; | |
1314 | token = match_token(string, | |
1315 | nfs_lookupcache_tokens, args); | |
1316 | kfree(string); | |
1317 | switch (token) { | |
1318 | case Opt_lookupcache_all: | |
1319 | mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); | |
1320 | break; | |
1321 | case Opt_lookupcache_positive: | |
1322 | mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1323 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; | |
1324 | break; | |
1325 | case Opt_lookupcache_none: | |
1326 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1327 | break; | |
1328 | default: | |
1329 | errors++; | |
1330 | dfprintk(MOUNT, "NFS: invalid " | |
1331 | "lookupcache argument\n"); | |
1332 | }; | |
1333 | break; | |
bf0fd768 | 1334 | |
f45663ce CL |
1335 | /* |
1336 | * Special options | |
1337 | */ | |
1338 | case Opt_sloppy: | |
1339 | sloppy = 1; | |
1340 | dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); | |
1341 | break; | |
bf0fd768 CL |
1342 | case Opt_userspace: |
1343 | case Opt_deprecated: | |
d33e4dfe CL |
1344 | dfprintk(MOUNT, "NFS: ignoring mount option " |
1345 | "'%s'\n", p); | |
bf0fd768 CL |
1346 | break; |
1347 | ||
1348 | default: | |
f45663ce CL |
1349 | errors++; |
1350 | dfprintk(MOUNT, "NFS: unrecognized mount option " | |
1351 | "'%s'\n", p); | |
bf0fd768 CL |
1352 | } |
1353 | } | |
1354 | ||
af904dea CL |
1355 | if (errors > 0) { |
1356 | dfprintk(MOUNT, "NFS: parsing encountered %d error%s\n", | |
1357 | errors, (errors == 1 ? "" : "s")); | |
1358 | if (!sloppy) | |
1359 | return 0; | |
1360 | } | |
bf0fd768 CL |
1361 | return 1; |
1362 | ||
1363 | out_nomem: | |
1364 | printk(KERN_INFO "NFS: not enough memory to parse option\n"); | |
1365 | return 0; | |
f9c3a380 EP |
1366 | out_security_failure: |
1367 | free_secdata(secdata); | |
1368 | printk(KERN_INFO "NFS: security options invalid: %d\n", rc); | |
1369 | return 0; | |
bf0fd768 CL |
1370 | } |
1371 | ||
0076d7b7 CL |
1372 | /* |
1373 | * Use the remote server's MOUNT service to request the NFS file handle | |
1374 | * corresponding to the provided path. | |
1375 | */ | |
1376 | static int nfs_try_mount(struct nfs_parsed_mount_data *args, | |
1377 | struct nfs_fh *root_fh) | |
1378 | { | |
c5d120f8 CL |
1379 | struct nfs_mount_request request = { |
1380 | .sap = (struct sockaddr *) | |
1381 | &args->mount_server.address, | |
1382 | .dirpath = args->nfs_server.export_path, | |
1383 | .protocol = args->mount_server.protocol, | |
1384 | .fh = root_fh, | |
50a737f8 | 1385 | .noresvport = args->flags & NFS_MOUNT_NORESVPORT, |
c5d120f8 | 1386 | }; |
4c568017 | 1387 | int status; |
0076d7b7 CL |
1388 | |
1389 | if (args->mount_server.version == 0) { | |
1390 | if (args->flags & NFS_MOUNT_VER3) | |
1391 | args->mount_server.version = NFS_MNT3_VERSION; | |
1392 | else | |
1393 | args->mount_server.version = NFS_MNT_VERSION; | |
1394 | } | |
c5d120f8 | 1395 | request.version = args->mount_server.version; |
0076d7b7 | 1396 | |
33832034 | 1397 | if (args->mount_server.hostname) |
c5d120f8 | 1398 | request.hostname = args->mount_server.hostname; |
33832034 | 1399 | else |
c5d120f8 | 1400 | request.hostname = args->nfs_server.hostname; |
33832034 | 1401 | |
0076d7b7 CL |
1402 | /* |
1403 | * Construct the mount server's address. | |
1404 | */ | |
4c568017 | 1405 | if (args->mount_server.address.ss_family == AF_UNSPEC) { |
c5d120f8 | 1406 | memcpy(request.sap, &args->nfs_server.address, |
4c568017 CL |
1407 | args->nfs_server.addrlen); |
1408 | args->mount_server.addrlen = args->nfs_server.addrlen; | |
1409 | } | |
c5d120f8 | 1410 | request.salen = args->mount_server.addrlen; |
4c568017 | 1411 | |
aad70007 JL |
1412 | /* |
1413 | * autobind will be used if mount_server.port == 0 | |
1414 | */ | |
c5d120f8 | 1415 | nfs_set_port(request.sap, args->mount_server.port); |
0076d7b7 CL |
1416 | |
1417 | /* | |
1418 | * Now ask the mount server to map our export path | |
1419 | * to a file handle. | |
1420 | */ | |
c5d120f8 | 1421 | status = nfs_mount(&request); |
efd8340b CL |
1422 | if (status == 0) |
1423 | return 0; | |
0076d7b7 | 1424 | |
396cee97 | 1425 | dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n", |
c5d120f8 | 1426 | request.hostname, status); |
0076d7b7 CL |
1427 | return status; |
1428 | } | |
1429 | ||
d1aa0825 CL |
1430 | static int nfs_parse_simple_hostname(const char *dev_name, |
1431 | char **hostname, size_t maxnamlen, | |
1432 | char **export_path, size_t maxpathlen) | |
dc045898 CL |
1433 | { |
1434 | size_t len; | |
1435 | char *colon, *comma; | |
1436 | ||
1437 | colon = strchr(dev_name, ':'); | |
1438 | if (colon == NULL) | |
1439 | goto out_bad_devname; | |
1440 | ||
1441 | len = colon - dev_name; | |
1442 | if (len > maxnamlen) | |
1443 | goto out_hostname; | |
1444 | ||
1445 | /* N.B. caller will free nfs_server.hostname in all cases */ | |
1446 | *hostname = kstrndup(dev_name, len, GFP_KERNEL); | |
1447 | if (!*hostname) | |
1448 | goto out_nomem; | |
1449 | ||
1450 | /* kill possible hostname list: not supported */ | |
1451 | comma = strchr(*hostname, ','); | |
1452 | if (comma != NULL) { | |
1453 | if (comma == *hostname) | |
1454 | goto out_bad_devname; | |
1455 | *comma = '\0'; | |
1456 | } | |
1457 | ||
1458 | colon++; | |
1459 | len = strlen(colon); | |
1460 | if (len > maxpathlen) | |
1461 | goto out_path; | |
1462 | *export_path = kstrndup(colon, len, GFP_KERNEL); | |
1463 | if (!*export_path) | |
1464 | goto out_nomem; | |
1465 | ||
1466 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path); | |
1467 | return 0; | |
1468 | ||
1469 | out_bad_devname: | |
1470 | dfprintk(MOUNT, "NFS: device name not in host:path format\n"); | |
1471 | return -EINVAL; | |
1472 | ||
1473 | out_nomem: | |
1474 | dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); | |
1475 | return -ENOMEM; | |
1476 | ||
1477 | out_hostname: | |
1478 | dfprintk(MOUNT, "NFS: server hostname too long\n"); | |
1479 | return -ENAMETOOLONG; | |
1480 | ||
1481 | out_path: | |
1482 | dfprintk(MOUNT, "NFS: export pathname too long\n"); | |
1483 | return -ENAMETOOLONG; | |
1484 | } | |
1485 | ||
d1aa0825 CL |
1486 | /* |
1487 | * Hostname has square brackets around it because it contains one or | |
1488 | * more colons. We look for the first closing square bracket, and a | |
1489 | * colon must follow it. | |
1490 | */ | |
1491 | static int nfs_parse_protected_hostname(const char *dev_name, | |
1492 | char **hostname, size_t maxnamlen, | |
1493 | char **export_path, size_t maxpathlen) | |
1494 | { | |
1495 | size_t len; | |
1496 | char *start, *end; | |
1497 | ||
1498 | start = (char *)(dev_name + 1); | |
1499 | ||
1500 | end = strchr(start, ']'); | |
1501 | if (end == NULL) | |
1502 | goto out_bad_devname; | |
1503 | if (*(end + 1) != ':') | |
1504 | goto out_bad_devname; | |
1505 | ||
1506 | len = end - start; | |
1507 | if (len > maxnamlen) | |
1508 | goto out_hostname; | |
1509 | ||
1510 | /* N.B. caller will free nfs_server.hostname in all cases */ | |
1511 | *hostname = kstrndup(start, len, GFP_KERNEL); | |
1512 | if (*hostname == NULL) | |
1513 | goto out_nomem; | |
1514 | ||
1515 | end += 2; | |
1516 | len = strlen(end); | |
1517 | if (len > maxpathlen) | |
1518 | goto out_path; | |
1519 | *export_path = kstrndup(end, len, GFP_KERNEL); | |
1520 | if (!*export_path) | |
1521 | goto out_nomem; | |
1522 | ||
1523 | return 0; | |
1524 | ||
1525 | out_bad_devname: | |
1526 | dfprintk(MOUNT, "NFS: device name not in host:path format\n"); | |
1527 | return -EINVAL; | |
1528 | ||
1529 | out_nomem: | |
1530 | dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); | |
1531 | return -ENOMEM; | |
1532 | ||
1533 | out_hostname: | |
1534 | dfprintk(MOUNT, "NFS: server hostname too long\n"); | |
1535 | return -ENAMETOOLONG; | |
1536 | ||
1537 | out_path: | |
1538 | dfprintk(MOUNT, "NFS: export pathname too long\n"); | |
1539 | return -ENAMETOOLONG; | |
1540 | } | |
1541 | ||
1542 | /* | |
1543 | * Split "dev_name" into "hostname:export_path". | |
1544 | * | |
1545 | * The leftmost colon demarks the split between the server's hostname | |
1546 | * and the export path. If the hostname starts with a left square | |
1547 | * bracket, then it may contain colons. | |
1548 | * | |
1549 | * Note: caller frees hostname and export path, even on error. | |
1550 | */ | |
1551 | static int nfs_parse_devname(const char *dev_name, | |
1552 | char **hostname, size_t maxnamlen, | |
1553 | char **export_path, size_t maxpathlen) | |
1554 | { | |
1555 | if (*dev_name == '[') | |
1556 | return nfs_parse_protected_hostname(dev_name, | |
1557 | hostname, maxnamlen, | |
1558 | export_path, maxpathlen); | |
1559 | ||
1560 | return nfs_parse_simple_hostname(dev_name, | |
1561 | hostname, maxnamlen, | |
1562 | export_path, maxpathlen); | |
1563 | } | |
1564 | ||
f7b422b1 | 1565 | /* |
54ceac45 DH |
1566 | * Validate the NFS2/NFS3 mount data |
1567 | * - fills in the mount root filehandle | |
136d558c CL |
1568 | * |
1569 | * For option strings, user space handles the following behaviors: | |
1570 | * | |
1571 | * + DNS: mapping server host name to IP address ("addr=" option) | |
1572 | * | |
1573 | * + failure mode: how to behave if a mount request can't be handled | |
1574 | * immediately ("fg/bg" option) | |
1575 | * | |
1576 | * + retry: how often to retry a mount request ("retry=" option) | |
1577 | * | |
1578 | * + breaking back: trying proto=udp after proto=tcp, v2 after v3, | |
1579 | * mountproto=tcp after mountproto=udp, and so on | |
f7b422b1 | 1580 | */ |
2283f8d6 TT |
1581 | static int nfs_validate_mount_data(void *options, |
1582 | struct nfs_parsed_mount_data *args, | |
136d558c CL |
1583 | struct nfs_fh *mntfh, |
1584 | const char *dev_name) | |
f7b422b1 | 1585 | { |
2283f8d6 | 1586 | struct nfs_mount_data *data = (struct nfs_mount_data *)options; |
136d558c | 1587 | |
5df36e78 CL |
1588 | if (data == NULL) |
1589 | goto out_no_data; | |
f7b422b1 | 1590 | |
2283f8d6 TT |
1591 | args->flags = (NFS_MOUNT_VER3 | NFS_MOUNT_TCP); |
1592 | args->rsize = NFS_MAX_FILE_IO_SIZE; | |
1593 | args->wsize = NFS_MAX_FILE_IO_SIZE; | |
0e0cab74 CL |
1594 | args->acregmin = NFS_DEF_ACREGMIN; |
1595 | args->acregmax = NFS_DEF_ACREGMAX; | |
1596 | args->acdirmin = NFS_DEF_ACDIRMIN; | |
1597 | args->acdirmax = NFS_DEF_ACDIRMAX; | |
f22d6d79 | 1598 | args->mount_server.port = 0; /* autobind unless user sets port */ |
f22d6d79 | 1599 | args->nfs_server.port = 0; /* autobind unless user sets port */ |
0896a725 | 1600 | args->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
dd07c947 | 1601 | args->auth_flavors[0] = RPC_AUTH_UNIX; |
2283f8d6 | 1602 | |
54ceac45 | 1603 | switch (data->version) { |
5df36e78 CL |
1604 | case 1: |
1605 | data->namlen = 0; | |
1606 | case 2: | |
1607 | data->bsize = 0; | |
1608 | case 3: | |
1609 | if (data->flags & NFS_MOUNT_VER3) | |
1610 | goto out_no_v3; | |
1611 | data->root.size = NFS2_FHSIZE; | |
1612 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
1613 | case 4: | |
1614 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1615 | goto out_no_sec; | |
1616 | case 5: | |
1617 | memset(data->context, 0, sizeof(data->context)); | |
1618 | case 6: | |
b7e24457 TM |
1619 | if (data->flags & NFS_MOUNT_VER3) { |
1620 | if (data->root.size > NFS3_FHSIZE || data->root.size == 0) | |
1621 | goto out_invalid_fh; | |
5df36e78 | 1622 | mntfh->size = data->root.size; |
b7e24457 | 1623 | } else |
5df36e78 CL |
1624 | mntfh->size = NFS2_FHSIZE; |
1625 | ||
5df36e78 CL |
1626 | |
1627 | memcpy(mntfh->data, data->root.data, mntfh->size); | |
1628 | if (mntfh->size < sizeof(mntfh->data)) | |
1629 | memset(mntfh->data + mntfh->size, 0, | |
1630 | sizeof(mntfh->data) - mntfh->size); | |
6e88e061 | 1631 | |
2283f8d6 TT |
1632 | /* |
1633 | * Translate to nfs_parsed_mount_data, which nfs_fill_super | |
1634 | * can deal with. | |
1635 | */ | |
ff3525a5 | 1636 | args->flags = data->flags & NFS_MOUNT_FLAGMASK; |
2283f8d6 TT |
1637 | args->rsize = data->rsize; |
1638 | args->wsize = data->wsize; | |
2283f8d6 TT |
1639 | args->timeo = data->timeo; |
1640 | args->retrans = data->retrans; | |
1641 | args->acregmin = data->acregmin; | |
1642 | args->acregmax = data->acregmax; | |
1643 | args->acdirmin = data->acdirmin; | |
1644 | args->acdirmax = data->acdirmax; | |
4c568017 CL |
1645 | |
1646 | memcpy(&args->nfs_server.address, &data->addr, | |
1647 | sizeof(data->addr)); | |
1648 | args->nfs_server.addrlen = sizeof(data->addr); | |
1649 | if (!nfs_verify_server_address((struct sockaddr *) | |
1650 | &args->nfs_server.address)) | |
1651 | goto out_no_address; | |
1652 | ||
2283f8d6 | 1653 | if (!(data->flags & NFS_MOUNT_TCP)) |
0896a725 | 1654 | args->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
2283f8d6 TT |
1655 | /* N.B. caller will free nfs_server.hostname in all cases */ |
1656 | args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); | |
1657 | args->namlen = data->namlen; | |
1658 | args->bsize = data->bsize; | |
dd07c947 CL |
1659 | |
1660 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1661 | args->auth_flavors[0] = data->pseudoflavor; | |
63649bd7 CG |
1662 | if (!args->nfs_server.hostname) |
1663 | goto out_nomem; | |
f9c3a380 EP |
1664 | |
1665 | /* | |
1666 | * The legacy version 6 binary mount data from userspace has a | |
1667 | * field used only to transport selinux information into the | |
1668 | * the kernel. To continue to support that functionality we | |
1669 | * have a touch of selinux knowledge here in the NFS code. The | |
1670 | * userspace code converted context=blah to just blah so we are | |
1671 | * converting back to the full string selinux understands. | |
1672 | */ | |
1673 | if (data->context[0]){ | |
1674 | #ifdef CONFIG_SECURITY_SELINUX | |
1675 | int rc; | |
1676 | char *opts_str = kmalloc(sizeof(data->context) + 8, GFP_KERNEL); | |
1677 | if (!opts_str) | |
1678 | return -ENOMEM; | |
1679 | strcpy(opts_str, "context="); | |
1680 | data->context[NFS_MAX_CONTEXT_LEN] = '\0'; | |
1681 | strcat(opts_str, &data->context[0]); | |
1682 | rc = security_sb_parse_opts_str(opts_str, &args->lsm_opts); | |
1683 | kfree(opts_str); | |
1684 | if (rc) | |
1685 | return rc; | |
1686 | #else | |
1687 | return -EINVAL; | |
1688 | #endif | |
1689 | } | |
1690 | ||
5df36e78 | 1691 | break; |
136d558c | 1692 | default: { |
136d558c | 1693 | int status; |
136d558c | 1694 | |
2283f8d6 TT |
1695 | if (nfs_parse_mount_options((char *)options, args) == 0) |
1696 | return -EINVAL; | |
136d558c | 1697 | |
6e88e061 CL |
1698 | if (!nfs_verify_server_address((struct sockaddr *) |
1699 | &args->nfs_server.address)) | |
1700 | goto out_no_address; | |
1701 | ||
ed596a8a CL |
1702 | nfs_set_port((struct sockaddr *)&args->nfs_server.address, |
1703 | args->nfs_server.port); | |
1704 | ||
259875ef TM |
1705 | nfs_set_mount_transport_protocol(args); |
1706 | ||
dc045898 CL |
1707 | status = nfs_parse_devname(dev_name, |
1708 | &args->nfs_server.hostname, | |
1709 | PAGE_SIZE, | |
1710 | &args->nfs_server.export_path, | |
1711 | NFS_MAXPATHLEN); | |
1712 | if (!status) | |
1713 | status = nfs_try_mount(args, mntfh); | |
136d558c | 1714 | |
dc045898 CL |
1715 | kfree(args->nfs_server.export_path); |
1716 | args->nfs_server.export_path = NULL; | |
136d558c | 1717 | |
136d558c | 1718 | if (status) |
fdc6e2c8 | 1719 | return status; |
136d558c | 1720 | |
136d558c CL |
1721 | break; |
1722 | } | |
f7b422b1 | 1723 | } |
54ceac45 DH |
1724 | |
1725 | #ifndef CONFIG_NFS_V3 | |
2283f8d6 | 1726 | if (args->flags & NFS_MOUNT_VER3) |
5df36e78 CL |
1727 | goto out_v3_not_compiled; |
1728 | #endif /* !CONFIG_NFS_V3 */ | |
f7b422b1 | 1729 | |
5df36e78 | 1730 | return 0; |
f7b422b1 | 1731 | |
5df36e78 CL |
1732 | out_no_data: |
1733 | dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); | |
1734 | return -EINVAL; | |
54ceac45 | 1735 | |
5df36e78 CL |
1736 | out_no_v3: |
1737 | dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", | |
1738 | data->version); | |
1739 | return -EINVAL; | |
f7b422b1 | 1740 | |
5df36e78 CL |
1741 | out_no_sec: |
1742 | dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); | |
1743 | return -EINVAL; | |
1744 | ||
5df36e78 CL |
1745 | #ifndef CONFIG_NFS_V3 |
1746 | out_v3_not_compiled: | |
1747 | dfprintk(MOUNT, "NFS: NFSv3 is not compiled into kernel\n"); | |
1748 | return -EPROTONOSUPPORT; | |
1749 | #endif /* !CONFIG_NFS_V3 */ | |
1750 | ||
63649bd7 CG |
1751 | out_nomem: |
1752 | dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); | |
1753 | return -ENOMEM; | |
1754 | ||
5df36e78 CL |
1755 | out_no_address: |
1756 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); | |
1757 | return -EINVAL; | |
1758 | ||
1759 | out_invalid_fh: | |
1760 | dfprintk(MOUNT, "NFS: invalid root filehandle\n"); | |
1761 | return -EINVAL; | |
f7b422b1 DH |
1762 | } |
1763 | ||
48b605f8 JL |
1764 | static int |
1765 | nfs_compare_remount_data(struct nfs_server *nfss, | |
1766 | struct nfs_parsed_mount_data *data) | |
1767 | { | |
1768 | if (data->flags != nfss->flags || | |
1769 | data->rsize != nfss->rsize || | |
1770 | data->wsize != nfss->wsize || | |
1771 | data->retrans != nfss->client->cl_timeout->to_retries || | |
1772 | data->auth_flavors[0] != nfss->client->cl_auth->au_flavor || | |
1773 | data->acregmin != nfss->acregmin / HZ || | |
1774 | data->acregmax != nfss->acregmax / HZ || | |
1775 | data->acdirmin != nfss->acdirmin / HZ || | |
1776 | data->acdirmax != nfss->acdirmax / HZ || | |
1777 | data->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) || | |
1778 | data->nfs_server.addrlen != nfss->nfs_client->cl_addrlen || | |
1779 | memcmp(&data->nfs_server.address, &nfss->nfs_client->cl_addr, | |
1780 | data->nfs_server.addrlen) != 0) | |
1781 | return -EINVAL; | |
1782 | ||
1783 | return 0; | |
1784 | } | |
1785 | ||
1786 | static int | |
1787 | nfs_remount(struct super_block *sb, int *flags, char *raw_data) | |
1788 | { | |
1789 | int error; | |
1790 | struct nfs_server *nfss = sb->s_fs_info; | |
1791 | struct nfs_parsed_mount_data *data; | |
1792 | struct nfs_mount_data *options = (struct nfs_mount_data *)raw_data; | |
1793 | struct nfs4_mount_data *options4 = (struct nfs4_mount_data *)raw_data; | |
cd100725 | 1794 | u32 nfsvers = nfss->nfs_client->rpc_ops->version; |
48b605f8 JL |
1795 | |
1796 | /* | |
1797 | * Userspace mount programs that send binary options generally send | |
1798 | * them populated with default values. We have no way to know which | |
1799 | * ones were explicitly specified. Fall back to legacy behavior and | |
1800 | * just return success. | |
1801 | */ | |
31c94469 MZ |
1802 | if ((nfsvers == 4 && (!options4 || options4->version == 1)) || |
1803 | (nfsvers <= 3 && (!options || (options->version >= 1 && | |
1804 | options->version <= 6)))) | |
48b605f8 JL |
1805 | return 0; |
1806 | ||
1807 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
1808 | if (data == NULL) | |
1809 | return -ENOMEM; | |
1810 | ||
1811 | /* fill out struct with values from existing mount */ | |
1812 | data->flags = nfss->flags; | |
1813 | data->rsize = nfss->rsize; | |
1814 | data->wsize = nfss->wsize; | |
1815 | data->retrans = nfss->client->cl_timeout->to_retries; | |
1816 | data->auth_flavors[0] = nfss->client->cl_auth->au_flavor; | |
1817 | data->acregmin = nfss->acregmin / HZ; | |
1818 | data->acregmax = nfss->acregmax / HZ; | |
1819 | data->acdirmin = nfss->acdirmin / HZ; | |
1820 | data->acdirmax = nfss->acdirmax / HZ; | |
1821 | data->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; | |
1822 | data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; | |
1823 | memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr, | |
1824 | data->nfs_server.addrlen); | |
1825 | ||
1826 | /* overwrite those values with any that were specified */ | |
1827 | error = nfs_parse_mount_options((char *)options, data); | |
1828 | if (error < 0) | |
1829 | goto out; | |
1830 | ||
1831 | /* compare new mount options with old ones */ | |
1832 | error = nfs_compare_remount_data(nfss, data); | |
1833 | out: | |
1834 | kfree(data); | |
1835 | return error; | |
1836 | } | |
1837 | ||
f7b422b1 | 1838 | /* |
54ceac45 | 1839 | * Initialise the common bits of the superblock |
f7b422b1 | 1840 | */ |
54ceac45 | 1841 | static inline void nfs_initialise_sb(struct super_block *sb) |
f7b422b1 | 1842 | { |
54ceac45 | 1843 | struct nfs_server *server = NFS_SB(sb); |
5006a76c | 1844 | |
54ceac45 | 1845 | sb->s_magic = NFS_SUPER_MAGIC; |
f7b422b1 | 1846 | |
54ceac45 DH |
1847 | /* We probably want something more informative here */ |
1848 | snprintf(sb->s_id, sizeof(sb->s_id), | |
1849 | "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev)); | |
5006a76c | 1850 | |
54ceac45 DH |
1851 | if (sb->s_blocksize == 0) |
1852 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
1853 | &sb->s_blocksize_bits); | |
f7b422b1 | 1854 | |
54ceac45 DH |
1855 | if (server->flags & NFS_MOUNT_NOAC) |
1856 | sb->s_flags |= MS_SYNCHRONOUS; | |
f7b422b1 | 1857 | |
54ceac45 | 1858 | nfs_super_set_maxbytes(sb, server->maxfilesize); |
f7b422b1 DH |
1859 | } |
1860 | ||
1861 | /* | |
54ceac45 | 1862 | * Finish setting up an NFS2/3 superblock |
f7b422b1 | 1863 | */ |
2283f8d6 TT |
1864 | static void nfs_fill_super(struct super_block *sb, |
1865 | struct nfs_parsed_mount_data *data) | |
f7b422b1 DH |
1866 | { |
1867 | struct nfs_server *server = NFS_SB(sb); | |
5006a76c | 1868 | |
54ceac45 DH |
1869 | sb->s_blocksize_bits = 0; |
1870 | sb->s_blocksize = 0; | |
1871 | if (data->bsize) | |
1872 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); | |
f7b422b1 | 1873 | |
54ceac45 DH |
1874 | if (server->flags & NFS_MOUNT_VER3) { |
1875 | /* The VFS shouldn't apply the umask to mode bits. We will do | |
1876 | * so ourselves when necessary. | |
1877 | */ | |
1878 | sb->s_flags |= MS_POSIXACL; | |
1879 | sb->s_time_gran = 1; | |
816724e6 | 1880 | } |
54ceac45 DH |
1881 | |
1882 | sb->s_op = &nfs_sops; | |
1883 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1884 | } |
1885 | ||
1886 | /* | |
54ceac45 | 1887 | * Finish setting up a cloned NFS2/3 superblock |
f7b422b1 | 1888 | */ |
54ceac45 DH |
1889 | static void nfs_clone_super(struct super_block *sb, |
1890 | const struct super_block *old_sb) | |
f7b422b1 | 1891 | { |
54ceac45 DH |
1892 | struct nfs_server *server = NFS_SB(sb); |
1893 | ||
1894 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; | |
1895 | sb->s_blocksize = old_sb->s_blocksize; | |
1896 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 1897 | |
f7b422b1 | 1898 | if (server->flags & NFS_MOUNT_VER3) { |
54ceac45 DH |
1899 | /* The VFS shouldn't apply the umask to mode bits. We will do |
1900 | * so ourselves when necessary. | |
f7b422b1 DH |
1901 | */ |
1902 | sb->s_flags |= MS_POSIXACL; | |
f7b422b1 | 1903 | sb->s_time_gran = 1; |
f7b422b1 DH |
1904 | } |
1905 | ||
54ceac45 DH |
1906 | sb->s_op = old_sb->s_op; |
1907 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1908 | } |
1909 | ||
275a5d24 TM |
1910 | static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags) |
1911 | { | |
1912 | const struct nfs_server *a = s->s_fs_info; | |
1913 | const struct rpc_clnt *clnt_a = a->client; | |
1914 | const struct rpc_clnt *clnt_b = b->client; | |
1915 | ||
1916 | if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK)) | |
1917 | goto Ebusy; | |
1918 | if (a->nfs_client != b->nfs_client) | |
1919 | goto Ebusy; | |
1920 | if (a->flags != b->flags) | |
1921 | goto Ebusy; | |
1922 | if (a->wsize != b->wsize) | |
1923 | goto Ebusy; | |
1924 | if (a->rsize != b->rsize) | |
1925 | goto Ebusy; | |
1926 | if (a->acregmin != b->acregmin) | |
1927 | goto Ebusy; | |
1928 | if (a->acregmax != b->acregmax) | |
1929 | goto Ebusy; | |
1930 | if (a->acdirmin != b->acdirmin) | |
1931 | goto Ebusy; | |
1932 | if (a->acdirmax != b->acdirmax) | |
1933 | goto Ebusy; | |
1934 | if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) | |
1935 | goto Ebusy; | |
e89a5a43 | 1936 | return 1; |
275a5d24 | 1937 | Ebusy: |
e89a5a43 TM |
1938 | return 0; |
1939 | } | |
1940 | ||
1941 | struct nfs_sb_mountdata { | |
1942 | struct nfs_server *server; | |
1943 | int mntflags; | |
1944 | }; | |
1945 | ||
1946 | static int nfs_set_super(struct super_block *s, void *data) | |
1947 | { | |
1948 | struct nfs_sb_mountdata *sb_mntdata = data; | |
1949 | struct nfs_server *server = sb_mntdata->server; | |
1950 | int ret; | |
1951 | ||
1952 | s->s_flags = sb_mntdata->mntflags; | |
1953 | s->s_fs_info = server; | |
1954 | ret = set_anon_super(s, server); | |
1955 | if (ret == 0) | |
1956 | server->s_dev = s->s_dev; | |
1957 | return ret; | |
1958 | } | |
1959 | ||
fd00a8ff CL |
1960 | static int nfs_compare_super_address(struct nfs_server *server1, |
1961 | struct nfs_server *server2) | |
1962 | { | |
1963 | struct sockaddr *sap1, *sap2; | |
1964 | ||
1965 | sap1 = (struct sockaddr *)&server1->nfs_client->cl_addr; | |
1966 | sap2 = (struct sockaddr *)&server2->nfs_client->cl_addr; | |
1967 | ||
1968 | if (sap1->sa_family != sap2->sa_family) | |
1969 | return 0; | |
1970 | ||
1971 | switch (sap1->sa_family) { | |
1972 | case AF_INET: { | |
1973 | struct sockaddr_in *sin1 = (struct sockaddr_in *)sap1; | |
1974 | struct sockaddr_in *sin2 = (struct sockaddr_in *)sap2; | |
1975 | if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) | |
1976 | return 0; | |
1977 | if (sin1->sin_port != sin2->sin_port) | |
1978 | return 0; | |
1979 | break; | |
1980 | } | |
1981 | case AF_INET6: { | |
1982 | struct sockaddr_in6 *sin1 = (struct sockaddr_in6 *)sap1; | |
1983 | struct sockaddr_in6 *sin2 = (struct sockaddr_in6 *)sap2; | |
1984 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) | |
1985 | return 0; | |
1986 | if (sin1->sin6_port != sin2->sin6_port) | |
1987 | return 0; | |
1988 | break; | |
1989 | } | |
1990 | default: | |
1991 | return 0; | |
1992 | } | |
1993 | ||
1994 | return 1; | |
1995 | } | |
1996 | ||
e89a5a43 TM |
1997 | static int nfs_compare_super(struct super_block *sb, void *data) |
1998 | { | |
1999 | struct nfs_sb_mountdata *sb_mntdata = data; | |
2000 | struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb); | |
2001 | int mntflags = sb_mntdata->mntflags; | |
2002 | ||
fd00a8ff | 2003 | if (!nfs_compare_super_address(old, server)) |
e89a5a43 TM |
2004 | return 0; |
2005 | /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */ | |
2006 | if (old->flags & NFS_MOUNT_UNSHARED) | |
2007 | return 0; | |
2008 | if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0) | |
2009 | return 0; | |
2010 | return nfs_compare_mount_options(sb, server, mntflags); | |
275a5d24 TM |
2011 | } |
2012 | ||
fa799759 MS |
2013 | static int nfs_bdi_register(struct nfs_server *server) |
2014 | { | |
2015 | return bdi_register_dev(&server->backing_dev_info, server->s_dev); | |
2016 | } | |
2017 | ||
816724e6 TM |
2018 | static int nfs_get_sb(struct file_system_type *fs_type, |
2019 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
f7b422b1 | 2020 | { |
f7b422b1 DH |
2021 | struct nfs_server *server = NULL; |
2022 | struct super_block *s; | |
33852a1f TM |
2023 | struct nfs_parsed_mount_data *data; |
2024 | struct nfs_fh *mntfh; | |
54ceac45 | 2025 | struct dentry *mntroot; |
75180df2 | 2026 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2027 | struct nfs_sb_mountdata sb_mntdata = { |
2028 | .mntflags = flags, | |
2029 | }; | |
33852a1f TM |
2030 | int error = -ENOMEM; |
2031 | ||
2032 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2033 | mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL); | |
2034 | if (data == NULL || mntfh == NULL) | |
2035 | goto out_free_fh; | |
f7b422b1 | 2036 | |
33852a1f | 2037 | security_init_mnt_opts(&data->lsm_opts); |
f9c3a380 | 2038 | |
54ceac45 | 2039 | /* Validate the mount data */ |
33852a1f | 2040 | error = nfs_validate_mount_data(raw_data, data, mntfh, dev_name); |
54ceac45 | 2041 | if (error < 0) |
0655960f | 2042 | goto out; |
f7b422b1 | 2043 | |
54ceac45 | 2044 | /* Get a volume representation */ |
33852a1f | 2045 | server = nfs_create_server(data, mntfh); |
54ceac45 DH |
2046 | if (IS_ERR(server)) { |
2047 | error = PTR_ERR(server); | |
0655960f | 2048 | goto out; |
f7b422b1 | 2049 | } |
e89a5a43 | 2050 | sb_mntdata.server = server; |
f7b422b1 | 2051 | |
75180df2 TM |
2052 | if (server->flags & NFS_MOUNT_UNSHARED) |
2053 | compare_super = NULL; | |
2054 | ||
54ceac45 | 2055 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 2056 | s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
2057 | if (IS_ERR(s)) { |
2058 | error = PTR_ERR(s); | |
54ceac45 | 2059 | goto out_err_nosb; |
816724e6 TM |
2060 | } |
2061 | ||
54ceac45 DH |
2062 | if (s->s_fs_info != server) { |
2063 | nfs_free_server(server); | |
2064 | server = NULL; | |
fa799759 MS |
2065 | } else { |
2066 | error = nfs_bdi_register(server); | |
2067 | if (error) | |
2068 | goto error_splat_super; | |
54ceac45 | 2069 | } |
f7b422b1 | 2070 | |
54ceac45 DH |
2071 | if (!s->s_root) { |
2072 | /* initial superblock/root creation */ | |
33852a1f | 2073 | nfs_fill_super(s, data); |
08734048 | 2074 | nfs_fscache_get_super_cookie(s, data); |
54ceac45 | 2075 | } |
f7b422b1 | 2076 | |
33852a1f | 2077 | mntroot = nfs_get_root(s, mntfh); |
54ceac45 DH |
2078 | if (IS_ERR(mntroot)) { |
2079 | error = PTR_ERR(mntroot); | |
2080 | goto error_splat_super; | |
f7b422b1 | 2081 | } |
816724e6 | 2082 | |
33852a1f | 2083 | error = security_sb_set_mnt_opts(s, &data->lsm_opts); |
f9c3a380 EP |
2084 | if (error) |
2085 | goto error_splat_root; | |
2086 | ||
54ceac45 DH |
2087 | s->s_flags |= MS_ACTIVE; |
2088 | mnt->mnt_sb = s; | |
2089 | mnt->mnt_root = mntroot; | |
0655960f CL |
2090 | error = 0; |
2091 | ||
2092 | out: | |
33852a1f TM |
2093 | kfree(data->nfs_server.hostname); |
2094 | kfree(data->mount_server.hostname); | |
08734048 | 2095 | kfree(data->fscache_uniq); |
33852a1f TM |
2096 | security_free_mnt_opts(&data->lsm_opts); |
2097 | out_free_fh: | |
2098 | kfree(mntfh); | |
2099 | kfree(data); | |
0655960f | 2100 | return error; |
816724e6 | 2101 | |
54ceac45 DH |
2102 | out_err_nosb: |
2103 | nfs_free_server(server); | |
0655960f | 2104 | goto out; |
54ceac45 | 2105 | |
f9c3a380 EP |
2106 | error_splat_root: |
2107 | dput(mntroot); | |
54ceac45 DH |
2108 | error_splat_super: |
2109 | up_write(&s->s_umount); | |
2110 | deactivate_super(s); | |
0655960f | 2111 | goto out; |
f7b422b1 DH |
2112 | } |
2113 | ||
54ceac45 DH |
2114 | /* |
2115 | * Destroy an NFS2/3 superblock | |
2116 | */ | |
f7b422b1 DH |
2117 | static void nfs_kill_super(struct super_block *s) |
2118 | { | |
2119 | struct nfs_server *server = NFS_SB(s); | |
2120 | ||
fa799759 | 2121 | bdi_unregister(&server->backing_dev_info); |
f7b422b1 | 2122 | kill_anon_super(s); |
08734048 | 2123 | nfs_fscache_release_super_cookie(s); |
54ceac45 | 2124 | nfs_free_server(server); |
f7b422b1 DH |
2125 | } |
2126 | ||
54ceac45 DH |
2127 | /* |
2128 | * Clone an NFS2/3 server record on xdev traversal (FSID-change) | |
2129 | */ | |
2130 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags, | |
2131 | const char *dev_name, void *raw_data, | |
2132 | struct vfsmount *mnt) | |
f7b422b1 DH |
2133 | { |
2134 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
2135 | struct super_block *s; |
2136 | struct nfs_server *server; | |
2137 | struct dentry *mntroot; | |
75180df2 | 2138 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2139 | struct nfs_sb_mountdata sb_mntdata = { |
2140 | .mntflags = flags, | |
2141 | }; | |
54ceac45 | 2142 | int error; |
f7b422b1 | 2143 | |
54ceac45 | 2144 | dprintk("--> nfs_xdev_get_sb()\n"); |
f7b422b1 | 2145 | |
54ceac45 DH |
2146 | /* create a new volume representation */ |
2147 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
2148 | if (IS_ERR(server)) { | |
2149 | error = PTR_ERR(server); | |
2150 | goto out_err_noserver; | |
2151 | } | |
e89a5a43 | 2152 | sb_mntdata.server = server; |
8fa5c000 | 2153 | |
75180df2 TM |
2154 | if (server->flags & NFS_MOUNT_UNSHARED) |
2155 | compare_super = NULL; | |
2156 | ||
54ceac45 | 2157 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 2158 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2159 | if (IS_ERR(s)) { |
2160 | error = PTR_ERR(s); | |
2161 | goto out_err_nosb; | |
2162 | } | |
5006a76c | 2163 | |
54ceac45 DH |
2164 | if (s->s_fs_info != server) { |
2165 | nfs_free_server(server); | |
2166 | server = NULL; | |
fa799759 MS |
2167 | } else { |
2168 | error = nfs_bdi_register(server); | |
2169 | if (error) | |
2170 | goto error_splat_super; | |
f7b422b1 | 2171 | } |
24c8dbbb | 2172 | |
54ceac45 DH |
2173 | if (!s->s_root) { |
2174 | /* initial superblock/root creation */ | |
54ceac45 DH |
2175 | nfs_clone_super(s, data->sb); |
2176 | } | |
f7b422b1 | 2177 | |
54ceac45 DH |
2178 | mntroot = nfs_get_root(s, data->fh); |
2179 | if (IS_ERR(mntroot)) { | |
2180 | error = PTR_ERR(mntroot); | |
2181 | goto error_splat_super; | |
f7b422b1 | 2182 | } |
e9cc6c23 | 2183 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
4c1fe2f7 NB |
2184 | dput(mntroot); |
2185 | error = -ESTALE; | |
2186 | goto error_splat_super; | |
2187 | } | |
f7b422b1 | 2188 | |
54ceac45 DH |
2189 | s->s_flags |= MS_ACTIVE; |
2190 | mnt->mnt_sb = s; | |
2191 | mnt->mnt_root = mntroot; | |
f7b422b1 | 2192 | |
f9c3a380 EP |
2193 | /* clone any lsm security options from the parent to the new sb */ |
2194 | security_sb_clone_mnt_opts(data->sb, s); | |
2195 | ||
54ceac45 DH |
2196 | dprintk("<-- nfs_xdev_get_sb() = 0\n"); |
2197 | return 0; | |
24c8dbbb | 2198 | |
54ceac45 DH |
2199 | out_err_nosb: |
2200 | nfs_free_server(server); | |
2201 | out_err_noserver: | |
2202 | dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error); | |
2203 | return error; | |
f7b422b1 | 2204 | |
54ceac45 DH |
2205 | error_splat_super: |
2206 | up_write(&s->s_umount); | |
2207 | deactivate_super(s); | |
2208 | dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error); | |
2209 | return error; | |
f7b422b1 DH |
2210 | } |
2211 | ||
54ceac45 DH |
2212 | #ifdef CONFIG_NFS_V4 |
2213 | ||
f7b422b1 | 2214 | /* |
54ceac45 | 2215 | * Finish setting up a cloned NFS4 superblock |
f7b422b1 | 2216 | */ |
54ceac45 DH |
2217 | static void nfs4_clone_super(struct super_block *sb, |
2218 | const struct super_block *old_sb) | |
f7b422b1 | 2219 | { |
54ceac45 DH |
2220 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; |
2221 | sb->s_blocksize = old_sb->s_blocksize; | |
2222 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 2223 | sb->s_time_gran = 1; |
54ceac45 DH |
2224 | sb->s_op = old_sb->s_op; |
2225 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
2226 | } |
2227 | ||
54ceac45 DH |
2228 | /* |
2229 | * Set up an NFS4 superblock | |
2230 | */ | |
2231 | static void nfs4_fill_super(struct super_block *sb) | |
f7b422b1 | 2232 | { |
54ceac45 DH |
2233 | sb->s_time_gran = 1; |
2234 | sb->s_op = &nfs4_sops; | |
2235 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
2236 | } |
2237 | ||
f0768ebd CL |
2238 | /* |
2239 | * Validate NFSv4 mount options | |
2240 | */ | |
91ea40b9 TT |
2241 | static int nfs4_validate_mount_data(void *options, |
2242 | struct nfs_parsed_mount_data *args, | |
2243 | const char *dev_name) | |
f0768ebd | 2244 | { |
4c568017 | 2245 | struct sockaddr_in *ap; |
91ea40b9 | 2246 | struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; |
f0768ebd CL |
2247 | char *c; |
2248 | ||
2249 | if (data == NULL) | |
2250 | goto out_no_data; | |
2251 | ||
91ea40b9 TT |
2252 | args->rsize = NFS_MAX_FILE_IO_SIZE; |
2253 | args->wsize = NFS_MAX_FILE_IO_SIZE; | |
0e0cab74 CL |
2254 | args->acregmin = NFS_DEF_ACREGMIN; |
2255 | args->acregmax = NFS_DEF_ACREGMAX; | |
2256 | args->acdirmin = NFS_DEF_ACDIRMIN; | |
2257 | args->acdirmax = NFS_DEF_ACDIRMAX; | |
f22d6d79 | 2258 | args->nfs_server.port = NFS_PORT; /* 2049 unless user set port= */ |
6738b251 CL |
2259 | args->auth_flavors[0] = RPC_AUTH_UNIX; |
2260 | args->auth_flavor_len = 0; | |
91ea40b9 | 2261 | |
f0768ebd CL |
2262 | switch (data->version) { |
2263 | case 1: | |
4c568017 CL |
2264 | ap = (struct sockaddr_in *)&args->nfs_server.address; |
2265 | if (data->host_addrlen > sizeof(args->nfs_server.address)) | |
2266 | goto out_no_address; | |
2267 | if (data->host_addrlen == 0) | |
f0768ebd | 2268 | goto out_no_address; |
4c568017 CL |
2269 | args->nfs_server.addrlen = data->host_addrlen; |
2270 | if (copy_from_user(ap, data->host_addr, data->host_addrlen)) | |
f0768ebd | 2271 | return -EFAULT; |
91ea40b9 TT |
2272 | if (!nfs_verify_server_address((struct sockaddr *) |
2273 | &args->nfs_server.address)) | |
f0768ebd CL |
2274 | goto out_no_address; |
2275 | ||
6738b251 CL |
2276 | if (data->auth_flavourlen) { |
2277 | if (data->auth_flavourlen > 1) | |
2278 | goto out_inval_auth; | |
20c71f5e | 2279 | if (copy_from_user(&args->auth_flavors[0], |
91ea40b9 | 2280 | data->auth_flavours, |
20c71f5e | 2281 | sizeof(args->auth_flavors[0]))) |
f0768ebd | 2282 | return -EFAULT; |
f0768ebd CL |
2283 | } |
2284 | ||
2285 | c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); | |
2286 | if (IS_ERR(c)) | |
2287 | return PTR_ERR(c); | |
91ea40b9 | 2288 | args->nfs_server.hostname = c; |
f0768ebd CL |
2289 | |
2290 | c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); | |
2291 | if (IS_ERR(c)) | |
2292 | return PTR_ERR(c); | |
91ea40b9 TT |
2293 | args->nfs_server.export_path = c; |
2294 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); | |
f0768ebd CL |
2295 | |
2296 | c = strndup_user(data->client_addr.data, 16); | |
2297 | if (IS_ERR(c)) | |
2298 | return PTR_ERR(c); | |
91ea40b9 TT |
2299 | args->client_address = c; |
2300 | ||
2301 | /* | |
2302 | * Translate to nfs_parsed_mount_data, which nfs4_fill_super | |
2303 | * can deal with. | |
2304 | */ | |
2305 | ||
2306 | args->flags = data->flags & NFS4_MOUNT_FLAGMASK; | |
2307 | args->rsize = data->rsize; | |
2308 | args->wsize = data->wsize; | |
2309 | args->timeo = data->timeo; | |
2310 | args->retrans = data->retrans; | |
2311 | args->acregmin = data->acregmin; | |
2312 | args->acregmax = data->acregmax; | |
2313 | args->acdirmin = data->acdirmin; | |
2314 | args->acdirmax = data->acdirmax; | |
2315 | args->nfs_server.protocol = data->proto; | |
259875ef | 2316 | nfs_validate_transport_protocol(args); |
f0768ebd CL |
2317 | |
2318 | break; | |
80071225 | 2319 | default: { |
dc045898 | 2320 | int status; |
91ea40b9 TT |
2321 | |
2322 | if (nfs_parse_mount_options((char *)options, args) == 0) | |
80071225 CL |
2323 | return -EINVAL; |
2324 | ||
2325 | if (!nfs_verify_server_address((struct sockaddr *) | |
91ea40b9 | 2326 | &args->nfs_server.address)) |
80071225 | 2327 | return -EINVAL; |
80071225 | 2328 | |
ed596a8a CL |
2329 | nfs_set_port((struct sockaddr *)&args->nfs_server.address, |
2330 | args->nfs_server.port); | |
2331 | ||
259875ef TM |
2332 | nfs_validate_transport_protocol(args); |
2333 | ||
6738b251 | 2334 | if (args->auth_flavor_len > 1) |
80071225 | 2335 | goto out_inval_auth; |
80071225 | 2336 | |
91ea40b9 | 2337 | if (args->client_address == NULL) |
0a87cf12 JL |
2338 | goto out_no_client_address; |
2339 | ||
dc045898 CL |
2340 | status = nfs_parse_devname(dev_name, |
2341 | &args->nfs_server.hostname, | |
2342 | NFS4_MAXNAMLEN, | |
2343 | &args->nfs_server.export_path, | |
2344 | NFS4_MAXPATHLEN); | |
2345 | if (status < 0) | |
2346 | return status; | |
2347 | ||
80071225 CL |
2348 | break; |
2349 | } | |
f0768ebd CL |
2350 | } |
2351 | ||
2352 | return 0; | |
2353 | ||
2354 | out_no_data: | |
2355 | dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); | |
2356 | return -EINVAL; | |
2357 | ||
2358 | out_inval_auth: | |
2359 | dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", | |
2360 | data->auth_flavourlen); | |
2361 | return -EINVAL; | |
2362 | ||
2363 | out_no_address: | |
2364 | dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); | |
2365 | return -EINVAL; | |
0a87cf12 JL |
2366 | |
2367 | out_no_client_address: | |
2368 | dfprintk(MOUNT, "NFS4: mount program didn't pass callback address\n"); | |
2369 | return -EINVAL; | |
f0768ebd CL |
2370 | } |
2371 | ||
54ceac45 DH |
2372 | /* |
2373 | * Get the superblock for an NFS4 mountpoint | |
2374 | */ | |
816724e6 TM |
2375 | static int nfs4_get_sb(struct file_system_type *fs_type, |
2376 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
f7b422b1 | 2377 | { |
33852a1f | 2378 | struct nfs_parsed_mount_data *data; |
54ceac45 DH |
2379 | struct super_block *s; |
2380 | struct nfs_server *server; | |
33852a1f | 2381 | struct nfs_fh *mntfh; |
54ceac45 | 2382 | struct dentry *mntroot; |
75180df2 | 2383 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2384 | struct nfs_sb_mountdata sb_mntdata = { |
2385 | .mntflags = flags, | |
2386 | }; | |
33852a1f TM |
2387 | int error = -ENOMEM; |
2388 | ||
2389 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2390 | mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL); | |
2391 | if (data == NULL || mntfh == NULL) | |
2392 | goto out_free_fh; | |
f7b422b1 | 2393 | |
33852a1f | 2394 | security_init_mnt_opts(&data->lsm_opts); |
f9c3a380 | 2395 | |
f0768ebd | 2396 | /* Validate the mount data */ |
33852a1f | 2397 | error = nfs4_validate_mount_data(raw_data, data, dev_name); |
f0768ebd CL |
2398 | if (error < 0) |
2399 | goto out; | |
f7b422b1 | 2400 | |
54ceac45 | 2401 | /* Get a volume representation */ |
33852a1f | 2402 | server = nfs4_create_server(data, mntfh); |
54ceac45 DH |
2403 | if (IS_ERR(server)) { |
2404 | error = PTR_ERR(server); | |
29eb981a | 2405 | goto out; |
f7b422b1 | 2406 | } |
e89a5a43 | 2407 | sb_mntdata.server = server; |
f7b422b1 | 2408 | |
75180df2 TM |
2409 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2410 | compare_super = NULL; | |
2411 | ||
54ceac45 | 2412 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 2413 | s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
2414 | if (IS_ERR(s)) { |
2415 | error = PTR_ERR(s); | |
f7b422b1 | 2416 | goto out_free; |
816724e6 TM |
2417 | } |
2418 | ||
5dd3177a TM |
2419 | if (s->s_fs_info != server) { |
2420 | nfs_free_server(server); | |
2421 | server = NULL; | |
fa799759 MS |
2422 | } else { |
2423 | error = nfs_bdi_register(server); | |
2424 | if (error) | |
2425 | goto error_splat_super; | |
5dd3177a TM |
2426 | } |
2427 | ||
54ceac45 DH |
2428 | if (!s->s_root) { |
2429 | /* initial superblock/root creation */ | |
54ceac45 | 2430 | nfs4_fill_super(s); |
08734048 | 2431 | nfs_fscache_get_super_cookie(s, data); |
54ceac45 | 2432 | } |
f7b422b1 | 2433 | |
33852a1f | 2434 | mntroot = nfs4_get_root(s, mntfh); |
54ceac45 DH |
2435 | if (IS_ERR(mntroot)) { |
2436 | error = PTR_ERR(mntroot); | |
2437 | goto error_splat_super; | |
f7b422b1 | 2438 | } |
54ceac45 | 2439 | |
33852a1f | 2440 | error = security_sb_set_mnt_opts(s, &data->lsm_opts); |
46c8ac74 EP |
2441 | if (error) |
2442 | goto error_splat_root; | |
2443 | ||
f7b422b1 | 2444 | s->s_flags |= MS_ACTIVE; |
54ceac45 DH |
2445 | mnt->mnt_sb = s; |
2446 | mnt->mnt_root = mntroot; | |
29eb981a CL |
2447 | error = 0; |
2448 | ||
2449 | out: | |
33852a1f TM |
2450 | kfree(data->client_address); |
2451 | kfree(data->nfs_server.export_path); | |
2452 | kfree(data->nfs_server.hostname); | |
08734048 | 2453 | kfree(data->fscache_uniq); |
33852a1f TM |
2454 | security_free_mnt_opts(&data->lsm_opts); |
2455 | out_free_fh: | |
2456 | kfree(mntfh); | |
2457 | kfree(data); | |
29eb981a | 2458 | return error; |
54ceac45 | 2459 | |
f7b422b1 | 2460 | out_free: |
54ceac45 | 2461 | nfs_free_server(server); |
29eb981a | 2462 | goto out; |
54ceac45 | 2463 | |
46c8ac74 EP |
2464 | error_splat_root: |
2465 | dput(mntroot); | |
54ceac45 DH |
2466 | error_splat_super: |
2467 | up_write(&s->s_umount); | |
2468 | deactivate_super(s); | |
29eb981a | 2469 | goto out; |
f7b422b1 DH |
2470 | } |
2471 | ||
2472 | static void nfs4_kill_super(struct super_block *sb) | |
2473 | { | |
2474 | struct nfs_server *server = NFS_SB(sb); | |
2475 | ||
515d8611 | 2476 | nfs_super_return_all_delegations(sb); |
f7b422b1 DH |
2477 | kill_anon_super(sb); |
2478 | ||
2479 | nfs4_renewd_prepare_shutdown(server); | |
08734048 | 2480 | nfs_fscache_release_super_cookie(sb); |
54ceac45 | 2481 | nfs_free_server(server); |
f7b422b1 DH |
2482 | } |
2483 | ||
2484 | /* | |
54ceac45 | 2485 | * Clone an NFS4 server record on xdev traversal (FSID-change) |
f7b422b1 | 2486 | */ |
54ceac45 DH |
2487 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags, |
2488 | const char *dev_name, void *raw_data, | |
2489 | struct vfsmount *mnt) | |
f7b422b1 | 2490 | { |
54ceac45 DH |
2491 | struct nfs_clone_mount *data = raw_data; |
2492 | struct super_block *s; | |
2493 | struct nfs_server *server; | |
2494 | struct dentry *mntroot; | |
75180df2 | 2495 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2496 | struct nfs_sb_mountdata sb_mntdata = { |
2497 | .mntflags = flags, | |
2498 | }; | |
54ceac45 | 2499 | int error; |
f7b422b1 | 2500 | |
54ceac45 | 2501 | dprintk("--> nfs4_xdev_get_sb()\n"); |
f7b422b1 | 2502 | |
54ceac45 DH |
2503 | /* create a new volume representation */ |
2504 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
2505 | if (IS_ERR(server)) { | |
2506 | error = PTR_ERR(server); | |
2507 | goto out_err_noserver; | |
f7b422b1 | 2508 | } |
e89a5a43 | 2509 | sb_mntdata.server = server; |
f7b422b1 | 2510 | |
75180df2 TM |
2511 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2512 | compare_super = NULL; | |
2513 | ||
54ceac45 | 2514 | /* Get a superblock - note that we may end up sharing one that already exists */ |
ec9a05c9 | 2515 | s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2516 | if (IS_ERR(s)) { |
2517 | error = PTR_ERR(s); | |
2518 | goto out_err_nosb; | |
f7b422b1 | 2519 | } |
f7b422b1 | 2520 | |
54ceac45 DH |
2521 | if (s->s_fs_info != server) { |
2522 | nfs_free_server(server); | |
2523 | server = NULL; | |
fa799759 MS |
2524 | } else { |
2525 | error = nfs_bdi_register(server); | |
2526 | if (error) | |
2527 | goto error_splat_super; | |
54ceac45 | 2528 | } |
f7b422b1 | 2529 | |
54ceac45 DH |
2530 | if (!s->s_root) { |
2531 | /* initial superblock/root creation */ | |
54ceac45 DH |
2532 | nfs4_clone_super(s, data->sb); |
2533 | } | |
f7b422b1 | 2534 | |
54ceac45 DH |
2535 | mntroot = nfs4_get_root(s, data->fh); |
2536 | if (IS_ERR(mntroot)) { | |
2537 | error = PTR_ERR(mntroot); | |
2538 | goto error_splat_super; | |
2539 | } | |
e9cc6c23 TM |
2540 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
2541 | dput(mntroot); | |
2542 | error = -ESTALE; | |
2543 | goto error_splat_super; | |
2544 | } | |
f7b422b1 | 2545 | |
54ceac45 DH |
2546 | s->s_flags |= MS_ACTIVE; |
2547 | mnt->mnt_sb = s; | |
2548 | mnt->mnt_root = mntroot; | |
2549 | ||
46c8ac74 EP |
2550 | security_sb_clone_mnt_opts(data->sb, s); |
2551 | ||
54ceac45 DH |
2552 | dprintk("<-- nfs4_xdev_get_sb() = 0\n"); |
2553 | return 0; | |
2554 | ||
2555 | out_err_nosb: | |
2556 | nfs_free_server(server); | |
2557 | out_err_noserver: | |
2558 | dprintk("<-- nfs4_xdev_get_sb() = %d [error]\n", error); | |
2559 | return error; | |
2560 | ||
2561 | error_splat_super: | |
2562 | up_write(&s->s_umount); | |
2563 | deactivate_super(s); | |
2564 | dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error); | |
2565 | return error; | |
f7b422b1 DH |
2566 | } |
2567 | ||
54ceac45 DH |
2568 | /* |
2569 | * Create an NFS4 server record on referral traversal | |
2570 | */ | |
2571 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, int flags, | |
2572 | const char *dev_name, void *raw_data, | |
2573 | struct vfsmount *mnt) | |
f7b422b1 DH |
2574 | { |
2575 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
2576 | struct super_block *s; |
2577 | struct nfs_server *server; | |
2578 | struct dentry *mntroot; | |
2579 | struct nfs_fh mntfh; | |
75180df2 | 2580 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2581 | struct nfs_sb_mountdata sb_mntdata = { |
2582 | .mntflags = flags, | |
2583 | }; | |
54ceac45 DH |
2584 | int error; |
2585 | ||
2586 | dprintk("--> nfs4_referral_get_sb()\n"); | |
2587 | ||
2588 | /* create a new volume representation */ | |
2589 | server = nfs4_create_referral_server(data, &mntfh); | |
2590 | if (IS_ERR(server)) { | |
2591 | error = PTR_ERR(server); | |
2592 | goto out_err_noserver; | |
2593 | } | |
e89a5a43 | 2594 | sb_mntdata.server = server; |
54ceac45 | 2595 | |
75180df2 TM |
2596 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2597 | compare_super = NULL; | |
2598 | ||
54ceac45 | 2599 | /* Get a superblock - note that we may end up sharing one that already exists */ |
ec9a05c9 | 2600 | s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2601 | if (IS_ERR(s)) { |
2602 | error = PTR_ERR(s); | |
2603 | goto out_err_nosb; | |
2604 | } | |
2605 | ||
2606 | if (s->s_fs_info != server) { | |
2607 | nfs_free_server(server); | |
2608 | server = NULL; | |
fa799759 MS |
2609 | } else { |
2610 | error = nfs_bdi_register(server); | |
2611 | if (error) | |
2612 | goto error_splat_super; | |
54ceac45 DH |
2613 | } |
2614 | ||
2615 | if (!s->s_root) { | |
2616 | /* initial superblock/root creation */ | |
54ceac45 DH |
2617 | nfs4_fill_super(s); |
2618 | } | |
2619 | ||
f2d0d85e | 2620 | mntroot = nfs4_get_root(s, &mntfh); |
54ceac45 DH |
2621 | if (IS_ERR(mntroot)) { |
2622 | error = PTR_ERR(mntroot); | |
2623 | goto error_splat_super; | |
2624 | } | |
e9cc6c23 TM |
2625 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
2626 | dput(mntroot); | |
2627 | error = -ESTALE; | |
2628 | goto error_splat_super; | |
2629 | } | |
54ceac45 DH |
2630 | |
2631 | s->s_flags |= MS_ACTIVE; | |
2632 | mnt->mnt_sb = s; | |
2633 | mnt->mnt_root = mntroot; | |
2634 | ||
46c8ac74 EP |
2635 | security_sb_clone_mnt_opts(data->sb, s); |
2636 | ||
54ceac45 DH |
2637 | dprintk("<-- nfs4_referral_get_sb() = 0\n"); |
2638 | return 0; | |
2639 | ||
2640 | out_err_nosb: | |
2641 | nfs_free_server(server); | |
2642 | out_err_noserver: | |
2643 | dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error); | |
2644 | return error; | |
2645 | ||
2646 | error_splat_super: | |
2647 | up_write(&s->s_umount); | |
2648 | deactivate_super(s); | |
2649 | dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error); | |
2650 | return error; | |
f7b422b1 DH |
2651 | } |
2652 | ||
54ceac45 | 2653 | #endif /* CONFIG_NFS_V4 */ |