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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> | |
c02d7adf TM |
45 | #include <linux/mnt_namespace.h> |
46 | #include <linux/namei.h> | |
f7b422b1 DH |
47 | #include <linux/nfs_idmap.h> |
48 | #include <linux/vfs.h> | |
49 | #include <linux/inet.h> | |
fd00a8ff CL |
50 | #include <linux/in6.h> |
51 | #include <net/ipv6.h> | |
d8e7748a | 52 | #include <linux/netdevice.h> |
f7b422b1 | 53 | #include <linux/nfs_xdr.h> |
b5d5dfbd | 54 | #include <linux/magic.h> |
bf0fd768 | 55 | #include <linux/parser.h> |
f7b422b1 DH |
56 | |
57 | #include <asm/system.h> | |
58 | #include <asm/uaccess.h> | |
59 | ||
60 | #include "nfs4_fs.h" | |
61 | #include "callback.h" | |
62 | #include "delegation.h" | |
63 | #include "iostat.h" | |
64 | #include "internal.h" | |
08734048 | 65 | #include "fscache.h" |
f7b422b1 DH |
66 | |
67 | #define NFSDBG_FACILITY NFSDBG_VFS | |
68 | ||
bf0fd768 CL |
69 | enum { |
70 | /* Mount options that take no arguments */ | |
71 | Opt_soft, Opt_hard, | |
bf0fd768 CL |
72 | Opt_posix, Opt_noposix, |
73 | Opt_cto, Opt_nocto, | |
74 | Opt_ac, Opt_noac, | |
75 | Opt_lock, Opt_nolock, | |
76 | Opt_v2, Opt_v3, | |
2cf7ff7a | 77 | Opt_udp, Opt_tcp, Opt_rdma, |
bf0fd768 CL |
78 | Opt_acl, Opt_noacl, |
79 | Opt_rdirplus, Opt_nordirplus, | |
75180df2 | 80 | Opt_sharecache, Opt_nosharecache, |
d740351b | 81 | Opt_resvport, Opt_noresvport, |
b797cac7 | 82 | Opt_fscache, Opt_nofscache, |
bf0fd768 CL |
83 | |
84 | /* Mount options that take integer arguments */ | |
85 | Opt_port, | |
86 | Opt_rsize, Opt_wsize, Opt_bsize, | |
87 | Opt_timeo, Opt_retrans, | |
88 | Opt_acregmin, Opt_acregmax, | |
89 | Opt_acdirmin, Opt_acdirmax, | |
90 | Opt_actimeo, | |
91 | Opt_namelen, | |
92 | Opt_mountport, | |
e887cbcf | 93 | Opt_mountvers, |
ad879cef | 94 | Opt_nfsvers, |
3fd5be9e | 95 | Opt_minorversion, |
bf0fd768 CL |
96 | |
97 | /* Mount options that take string arguments */ | |
33832034 | 98 | Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost, |
0ac83779 | 99 | Opt_addr, Opt_mountaddr, Opt_clientaddr, |
7973c1f1 | 100 | Opt_lookupcache, |
b797cac7 | 101 | Opt_fscache_uniq, |
bf0fd768 | 102 | |
f45663ce CL |
103 | /* Special mount options */ |
104 | Opt_userspace, Opt_deprecated, Opt_sloppy, | |
bf0fd768 CL |
105 | |
106 | Opt_err | |
107 | }; | |
108 | ||
a447c093 | 109 | static const match_table_t nfs_mount_option_tokens = { |
bf0fd768 CL |
110 | { Opt_userspace, "bg" }, |
111 | { Opt_userspace, "fg" }, | |
ecbb3845 CL |
112 | { Opt_userspace, "retry=%s" }, |
113 | ||
f45663ce CL |
114 | { Opt_sloppy, "sloppy" }, |
115 | ||
bf0fd768 CL |
116 | { Opt_soft, "soft" }, |
117 | { Opt_hard, "hard" }, | |
d33e4dfe CL |
118 | { Opt_deprecated, "intr" }, |
119 | { Opt_deprecated, "nointr" }, | |
bf0fd768 CL |
120 | { Opt_posix, "posix" }, |
121 | { Opt_noposix, "noposix" }, | |
122 | { Opt_cto, "cto" }, | |
123 | { Opt_nocto, "nocto" }, | |
124 | { Opt_ac, "ac" }, | |
125 | { Opt_noac, "noac" }, | |
126 | { Opt_lock, "lock" }, | |
127 | { Opt_nolock, "nolock" }, | |
128 | { Opt_v2, "v2" }, | |
129 | { Opt_v3, "v3" }, | |
130 | { Opt_udp, "udp" }, | |
131 | { Opt_tcp, "tcp" }, | |
2cf7ff7a | 132 | { Opt_rdma, "rdma" }, |
bf0fd768 CL |
133 | { Opt_acl, "acl" }, |
134 | { Opt_noacl, "noacl" }, | |
135 | { Opt_rdirplus, "rdirplus" }, | |
136 | { Opt_nordirplus, "nordirplus" }, | |
75180df2 TM |
137 | { Opt_sharecache, "sharecache" }, |
138 | { Opt_nosharecache, "nosharecache" }, | |
d740351b CL |
139 | { Opt_resvport, "resvport" }, |
140 | { Opt_noresvport, "noresvport" }, | |
b797cac7 DH |
141 | { Opt_fscache, "fsc" }, |
142 | { Opt_fscache_uniq, "fsc=%s" }, | |
143 | { Opt_nofscache, "nofsc" }, | |
bf0fd768 | 144 | |
a5a16bae CL |
145 | { Opt_port, "port=%s" }, |
146 | { Opt_rsize, "rsize=%s" }, | |
147 | { Opt_wsize, "wsize=%s" }, | |
148 | { Opt_bsize, "bsize=%s" }, | |
149 | { Opt_timeo, "timeo=%s" }, | |
150 | { Opt_retrans, "retrans=%s" }, | |
151 | { Opt_acregmin, "acregmin=%s" }, | |
152 | { Opt_acregmax, "acregmax=%s" }, | |
153 | { Opt_acdirmin, "acdirmin=%s" }, | |
154 | { Opt_acdirmax, "acdirmax=%s" }, | |
155 | { Opt_actimeo, "actimeo=%s" }, | |
156 | { Opt_namelen, "namlen=%s" }, | |
157 | { Opt_mountport, "mountport=%s" }, | |
158 | { Opt_mountvers, "mountvers=%s" }, | |
159 | { Opt_nfsvers, "nfsvers=%s" }, | |
160 | { Opt_nfsvers, "vers=%s" }, | |
f3f4f4ed | 161 | { Opt_minorversion, "minorversion=%s" }, |
bf0fd768 CL |
162 | |
163 | { Opt_sec, "sec=%s" }, | |
164 | { Opt_proto, "proto=%s" }, | |
165 | { Opt_mountproto, "mountproto=%s" }, | |
166 | { Opt_addr, "addr=%s" }, | |
167 | { Opt_clientaddr, "clientaddr=%s" }, | |
33832034 | 168 | { Opt_mounthost, "mounthost=%s" }, |
0ac83779 | 169 | { Opt_mountaddr, "mountaddr=%s" }, |
bf0fd768 | 170 | |
7973c1f1 TM |
171 | { Opt_lookupcache, "lookupcache=%s" }, |
172 | ||
bf0fd768 CL |
173 | { Opt_err, NULL } |
174 | }; | |
175 | ||
176 | enum { | |
2cf7ff7a | 177 | Opt_xprt_udp, Opt_xprt_tcp, Opt_xprt_rdma, |
bf0fd768 CL |
178 | |
179 | Opt_xprt_err | |
180 | }; | |
181 | ||
a447c093 | 182 | static const match_table_t nfs_xprt_protocol_tokens = { |
bf0fd768 CL |
183 | { Opt_xprt_udp, "udp" }, |
184 | { Opt_xprt_tcp, "tcp" }, | |
2cf7ff7a | 185 | { Opt_xprt_rdma, "rdma" }, |
bf0fd768 CL |
186 | |
187 | { Opt_xprt_err, NULL } | |
188 | }; | |
189 | ||
190 | enum { | |
191 | Opt_sec_none, Opt_sec_sys, | |
192 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
193 | Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, | |
194 | Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, | |
195 | ||
196 | Opt_sec_err | |
197 | }; | |
198 | ||
a447c093 | 199 | static const match_table_t nfs_secflavor_tokens = { |
bf0fd768 CL |
200 | { Opt_sec_none, "none" }, |
201 | { Opt_sec_none, "null" }, | |
202 | { Opt_sec_sys, "sys" }, | |
203 | ||
204 | { Opt_sec_krb5, "krb5" }, | |
205 | { Opt_sec_krb5i, "krb5i" }, | |
206 | { Opt_sec_krb5p, "krb5p" }, | |
207 | ||
208 | { Opt_sec_lkey, "lkey" }, | |
209 | { Opt_sec_lkeyi, "lkeyi" }, | |
210 | { Opt_sec_lkeyp, "lkeyp" }, | |
211 | ||
8d042218 OK |
212 | { Opt_sec_spkm, "spkm3" }, |
213 | { Opt_sec_spkmi, "spkm3i" }, | |
214 | { Opt_sec_spkmp, "spkm3p" }, | |
215 | ||
bf0fd768 CL |
216 | { Opt_sec_err, NULL } |
217 | }; | |
218 | ||
7973c1f1 TM |
219 | enum { |
220 | Opt_lookupcache_all, Opt_lookupcache_positive, | |
221 | Opt_lookupcache_none, | |
222 | ||
223 | Opt_lookupcache_err | |
224 | }; | |
225 | ||
226 | static match_table_t nfs_lookupcache_tokens = { | |
227 | { Opt_lookupcache_all, "all" }, | |
228 | { Opt_lookupcache_positive, "pos" }, | |
229 | { Opt_lookupcache_positive, "positive" }, | |
230 | { Opt_lookupcache_none, "none" }, | |
231 | ||
232 | { Opt_lookupcache_err, NULL } | |
233 | }; | |
234 | ||
bf0fd768 | 235 | |
42faad99 | 236 | static void nfs_umount_begin(struct super_block *); |
816724e6 | 237 | static int nfs_statfs(struct dentry *, struct kstatfs *); |
f7b422b1 DH |
238 | static int nfs_show_options(struct seq_file *, struct vfsmount *); |
239 | static int nfs_show_stats(struct seq_file *, struct vfsmount *); | |
816724e6 | 240 | static int nfs_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *); |
54ceac45 | 241 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, |
816724e6 | 242 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); |
f7b422b1 | 243 | static void nfs_kill_super(struct super_block *); |
48b605f8 | 244 | static int nfs_remount(struct super_block *sb, int *flags, char *raw_data); |
f7b422b1 DH |
245 | |
246 | static struct file_system_type nfs_fs_type = { | |
247 | .owner = THIS_MODULE, | |
248 | .name = "nfs", | |
249 | .get_sb = nfs_get_sb, | |
250 | .kill_sb = nfs_kill_super, | |
349457cc | 251 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
252 | }; |
253 | ||
54ceac45 | 254 | struct file_system_type nfs_xdev_fs_type = { |
f7b422b1 DH |
255 | .owner = THIS_MODULE, |
256 | .name = "nfs", | |
54ceac45 | 257 | .get_sb = nfs_xdev_get_sb, |
f7b422b1 | 258 | .kill_sb = nfs_kill_super, |
349457cc | 259 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
260 | }; |
261 | ||
ee9b6d61 | 262 | static const struct super_operations nfs_sops = { |
f7b422b1 DH |
263 | .alloc_inode = nfs_alloc_inode, |
264 | .destroy_inode = nfs_destroy_inode, | |
265 | .write_inode = nfs_write_inode, | |
266 | .statfs = nfs_statfs, | |
267 | .clear_inode = nfs_clear_inode, | |
268 | .umount_begin = nfs_umount_begin, | |
269 | .show_options = nfs_show_options, | |
270 | .show_stats = nfs_show_stats, | |
48b605f8 | 271 | .remount_fs = nfs_remount, |
f7b422b1 DH |
272 | }; |
273 | ||
274 | #ifdef CONFIG_NFS_V4 | |
816724e6 TM |
275 | static int nfs4_get_sb(struct file_system_type *fs_type, |
276 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
c02d7adf TM |
277 | static int nfs4_remote_get_sb(struct file_system_type *fs_type, |
278 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
54ceac45 DH |
279 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, |
280 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
281 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, | |
282 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
c02d7adf TM |
283 | static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type, |
284 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
f7b422b1 DH |
285 | static void nfs4_kill_super(struct super_block *sb); |
286 | ||
287 | static struct file_system_type nfs4_fs_type = { | |
288 | .owner = THIS_MODULE, | |
289 | .name = "nfs4", | |
290 | .get_sb = nfs4_get_sb, | |
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 | ||
c02d7adf TM |
295 | static struct file_system_type nfs4_remote_fs_type = { |
296 | .owner = THIS_MODULE, | |
297 | .name = "nfs4", | |
298 | .get_sb = nfs4_remote_get_sb, | |
299 | .kill_sb = nfs4_kill_super, | |
300 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, | |
301 | }; | |
302 | ||
54ceac45 | 303 | struct file_system_type nfs4_xdev_fs_type = { |
f7b422b1 DH |
304 | .owner = THIS_MODULE, |
305 | .name = "nfs4", | |
54ceac45 | 306 | .get_sb = nfs4_xdev_get_sb, |
f7b422b1 | 307 | .kill_sb = nfs4_kill_super, |
349457cc | 308 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
309 | }; |
310 | ||
c02d7adf TM |
311 | static struct file_system_type nfs4_remote_referral_fs_type = { |
312 | .owner = THIS_MODULE, | |
313 | .name = "nfs4", | |
314 | .get_sb = nfs4_remote_referral_get_sb, | |
315 | .kill_sb = nfs4_kill_super, | |
316 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, | |
317 | }; | |
318 | ||
54ceac45 | 319 | struct file_system_type nfs4_referral_fs_type = { |
f7b422b1 DH |
320 | .owner = THIS_MODULE, |
321 | .name = "nfs4", | |
54ceac45 | 322 | .get_sb = nfs4_referral_get_sb, |
f7b422b1 | 323 | .kill_sb = nfs4_kill_super, |
349457cc | 324 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
325 | }; |
326 | ||
ee9b6d61 | 327 | static const struct super_operations nfs4_sops = { |
f7b422b1 DH |
328 | .alloc_inode = nfs_alloc_inode, |
329 | .destroy_inode = nfs_destroy_inode, | |
330 | .write_inode = nfs_write_inode, | |
331 | .statfs = nfs_statfs, | |
332 | .clear_inode = nfs4_clear_inode, | |
333 | .umount_begin = nfs_umount_begin, | |
334 | .show_options = nfs_show_options, | |
335 | .show_stats = nfs_show_stats, | |
48b605f8 | 336 | .remount_fs = nfs_remount, |
f7b422b1 DH |
337 | }; |
338 | #endif | |
339 | ||
8e1f936b RR |
340 | static struct shrinker acl_shrinker = { |
341 | .shrink = nfs_access_cache_shrinker, | |
342 | .seeks = DEFAULT_SEEKS, | |
343 | }; | |
979df72e | 344 | |
f7b422b1 DH |
345 | /* |
346 | * Register the NFS filesystems | |
347 | */ | |
348 | int __init register_nfs_fs(void) | |
349 | { | |
350 | int ret; | |
351 | ||
352 | ret = register_filesystem(&nfs_fs_type); | |
353 | if (ret < 0) | |
354 | goto error_0; | |
355 | ||
f7b422b1 DH |
356 | ret = nfs_register_sysctl(); |
357 | if (ret < 0) | |
358 | goto error_1; | |
89a09141 | 359 | #ifdef CONFIG_NFS_V4 |
f7b422b1 DH |
360 | ret = register_filesystem(&nfs4_fs_type); |
361 | if (ret < 0) | |
362 | goto error_2; | |
363 | #endif | |
8e1f936b | 364 | register_shrinker(&acl_shrinker); |
f7b422b1 DH |
365 | return 0; |
366 | ||
367 | #ifdef CONFIG_NFS_V4 | |
368 | error_2: | |
369 | nfs_unregister_sysctl(); | |
89a09141 | 370 | #endif |
f7b422b1 DH |
371 | error_1: |
372 | unregister_filesystem(&nfs_fs_type); | |
f7b422b1 DH |
373 | error_0: |
374 | return ret; | |
375 | } | |
376 | ||
377 | /* | |
378 | * Unregister the NFS filesystems | |
379 | */ | |
380 | void __exit unregister_nfs_fs(void) | |
381 | { | |
8e1f936b | 382 | unregister_shrinker(&acl_shrinker); |
f7b422b1 DH |
383 | #ifdef CONFIG_NFS_V4 |
384 | unregister_filesystem(&nfs4_fs_type); | |
f7b422b1 | 385 | #endif |
49af7ee1 | 386 | nfs_unregister_sysctl(); |
f7b422b1 DH |
387 | unregister_filesystem(&nfs_fs_type); |
388 | } | |
389 | ||
1daef0a8 | 390 | void nfs_sb_active(struct super_block *sb) |
ef818a28 | 391 | { |
1daef0a8 | 392 | struct nfs_server *server = NFS_SB(sb); |
ef818a28 | 393 | |
1daef0a8 TM |
394 | if (atomic_inc_return(&server->active) == 1) |
395 | atomic_inc(&sb->s_active); | |
ef818a28 SD |
396 | } |
397 | ||
1daef0a8 | 398 | void nfs_sb_deactive(struct super_block *sb) |
ef818a28 SD |
399 | { |
400 | struct nfs_server *server = NFS_SB(sb); | |
1daef0a8 TM |
401 | |
402 | if (atomic_dec_and_test(&server->active)) | |
403 | deactivate_super(sb); | |
ef818a28 SD |
404 | } |
405 | ||
f7b422b1 DH |
406 | /* |
407 | * Deliver file system statistics to userspace | |
408 | */ | |
816724e6 | 409 | static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
f7b422b1 | 410 | { |
0c7d90cf | 411 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
f7b422b1 DH |
412 | unsigned char blockbits; |
413 | unsigned long blockres; | |
0c7d90cf | 414 | struct nfs_fh *fh = NFS_FH(dentry->d_inode); |
f7b422b1 DH |
415 | struct nfs_fattr fattr; |
416 | struct nfs_fsstat res = { | |
417 | .fattr = &fattr, | |
418 | }; | |
419 | int error; | |
420 | ||
8fa5c000 | 421 | error = server->nfs_client->rpc_ops->statfs(server, fh, &res); |
f7b422b1 DH |
422 | if (error < 0) |
423 | goto out_err; | |
1a0ba9ae | 424 | buf->f_type = NFS_SUPER_MAGIC; |
f7b422b1 DH |
425 | |
426 | /* | |
427 | * Current versions of glibc do not correctly handle the | |
428 | * case where f_frsize != f_bsize. Eventually we want to | |
429 | * report the value of wtmult in this field. | |
430 | */ | |
0c7d90cf | 431 | buf->f_frsize = dentry->d_sb->s_blocksize; |
f7b422b1 DH |
432 | |
433 | /* | |
434 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
435 | * are reported in units of f_frsize. Linux hasn't had | |
436 | * an f_frsize field in its statfs struct until recently, | |
437 | * thus historically Linux's sys_statfs reports these | |
438 | * fields in units of f_bsize. | |
439 | */ | |
0c7d90cf DH |
440 | buf->f_bsize = dentry->d_sb->s_blocksize; |
441 | blockbits = dentry->d_sb->s_blocksize_bits; | |
f7b422b1 DH |
442 | blockres = (1 << blockbits) - 1; |
443 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
444 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
445 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
446 | ||
447 | buf->f_files = res.tfiles; | |
448 | buf->f_ffree = res.afiles; | |
449 | ||
450 | buf->f_namelen = server->namelen; | |
1a0ba9ae | 451 | |
f7b422b1 DH |
452 | return 0; |
453 | ||
454 | out_err: | |
3110ff80 | 455 | dprintk("%s: statfs error = %d\n", __func__, -error); |
1a0ba9ae | 456 | return error; |
f7b422b1 DH |
457 | } |
458 | ||
7d4e2747 DH |
459 | /* |
460 | * Map the security flavour number to a name | |
461 | */ | |
81039f1f TM |
462 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
463 | { | |
7d4e2747 | 464 | static const struct { |
81039f1f TM |
465 | rpc_authflavor_t flavour; |
466 | const char *str; | |
467 | } sec_flavours[] = { | |
468 | { RPC_AUTH_NULL, "null" }, | |
469 | { RPC_AUTH_UNIX, "sys" }, | |
470 | { RPC_AUTH_GSS_KRB5, "krb5" }, | |
471 | { RPC_AUTH_GSS_KRB5I, "krb5i" }, | |
472 | { RPC_AUTH_GSS_KRB5P, "krb5p" }, | |
473 | { RPC_AUTH_GSS_LKEY, "lkey" }, | |
474 | { RPC_AUTH_GSS_LKEYI, "lkeyi" }, | |
475 | { RPC_AUTH_GSS_LKEYP, "lkeyp" }, | |
476 | { RPC_AUTH_GSS_SPKM, "spkm" }, | |
477 | { RPC_AUTH_GSS_SPKMI, "spkmi" }, | |
478 | { RPC_AUTH_GSS_SPKMP, "spkmp" }, | |
4d81cd16 | 479 | { UINT_MAX, "unknown" } |
81039f1f TM |
480 | }; |
481 | int i; | |
482 | ||
4d81cd16 | 483 | for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) { |
81039f1f TM |
484 | if (sec_flavours[i].flavour == flavour) |
485 | break; | |
486 | } | |
487 | return sec_flavours[i].str; | |
488 | } | |
489 | ||
82d101d5 CL |
490 | static void nfs_show_mountd_options(struct seq_file *m, struct nfs_server *nfss, |
491 | int showdefaults) | |
492 | { | |
493 | struct sockaddr *sap = (struct sockaddr *)&nfss->mountd_address; | |
494 | ||
495 | switch (sap->sa_family) { | |
496 | case AF_INET: { | |
497 | struct sockaddr_in *sin = (struct sockaddr_in *)sap; | |
be859405 | 498 | seq_printf(m, ",mountaddr=%pI4", &sin->sin_addr.s_addr); |
82d101d5 CL |
499 | break; |
500 | } | |
501 | case AF_INET6: { | |
502 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
5b095d98 | 503 | seq_printf(m, ",mountaddr=%pI6", &sin6->sin6_addr); |
82d101d5 CL |
504 | break; |
505 | } | |
506 | default: | |
507 | if (showdefaults) | |
508 | seq_printf(m, ",mountaddr=unspecified"); | |
509 | } | |
510 | ||
511 | if (nfss->mountd_version || showdefaults) | |
512 | seq_printf(m, ",mountvers=%u", nfss->mountd_version); | |
513 | if (nfss->mountd_port || showdefaults) | |
514 | seq_printf(m, ",mountport=%u", nfss->mountd_port); | |
515 | ||
516 | switch (nfss->mountd_protocol) { | |
517 | case IPPROTO_UDP: | |
518 | seq_printf(m, ",mountproto=udp"); | |
519 | break; | |
520 | case IPPROTO_TCP: | |
521 | seq_printf(m, ",mountproto=tcp"); | |
522 | break; | |
523 | default: | |
524 | if (showdefaults) | |
525 | seq_printf(m, ",mountproto=auto"); | |
526 | } | |
527 | } | |
528 | ||
f7b422b1 DH |
529 | /* |
530 | * Describe the mount options in force on this server representation | |
531 | */ | |
82d101d5 CL |
532 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, |
533 | int showdefaults) | |
f7b422b1 | 534 | { |
509de811 | 535 | static const struct proc_nfs_info { |
f7b422b1 | 536 | int flag; |
509de811 DH |
537 | const char *str; |
538 | const char *nostr; | |
f7b422b1 DH |
539 | } nfs_info[] = { |
540 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, | |
82d101d5 | 541 | { NFS_MOUNT_POSIX, ",posix", "" }, |
f7b422b1 DH |
542 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
543 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
544 | { NFS_MOUNT_NONLM, ",nolock", "" }, | |
545 | { NFS_MOUNT_NOACL, ",noacl", "" }, | |
74dd34e6 | 546 | { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" }, |
d740351b CL |
547 | { NFS_MOUNT_UNSHARED, ",nosharecache", "" }, |
548 | { NFS_MOUNT_NORESVPORT, ",noresvport", "" }, | |
f7b422b1 DH |
549 | { 0, NULL, NULL } |
550 | }; | |
509de811 | 551 | const struct proc_nfs_info *nfs_infop; |
8fa5c000 | 552 | struct nfs_client *clp = nfss->nfs_client; |
82d101d5 | 553 | u32 version = clp->rpc_ops->version; |
f7b422b1 | 554 | |
82d101d5 | 555 | seq_printf(m, ",vers=%u", version); |
2d767432 CL |
556 | seq_printf(m, ",rsize=%u", nfss->rsize); |
557 | seq_printf(m, ",wsize=%u", nfss->wsize); | |
82d101d5 CL |
558 | if (nfss->bsize != 0) |
559 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
560 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
0e0cab74 | 561 | if (nfss->acregmin != NFS_DEF_ACREGMIN*HZ || showdefaults) |
2d767432 | 562 | seq_printf(m, ",acregmin=%u", nfss->acregmin/HZ); |
0e0cab74 | 563 | if (nfss->acregmax != NFS_DEF_ACREGMAX*HZ || showdefaults) |
2d767432 | 564 | seq_printf(m, ",acregmax=%u", nfss->acregmax/HZ); |
0e0cab74 | 565 | if (nfss->acdirmin != NFS_DEF_ACDIRMIN*HZ || showdefaults) |
2d767432 | 566 | seq_printf(m, ",acdirmin=%u", nfss->acdirmin/HZ); |
0e0cab74 | 567 | if (nfss->acdirmax != NFS_DEF_ACDIRMAX*HZ || showdefaults) |
2d767432 | 568 | seq_printf(m, ",acdirmax=%u", nfss->acdirmax/HZ); |
f7b422b1 DH |
569 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { |
570 | if (nfss->flags & nfs_infop->flag) | |
571 | seq_puts(m, nfs_infop->str); | |
572 | else | |
573 | seq_puts(m, nfs_infop->nostr); | |
574 | } | |
56928edd TT |
575 | seq_printf(m, ",proto=%s", |
576 | rpc_peeraddr2str(nfss->client, RPC_DISPLAY_PROTO)); | |
82d101d5 CL |
577 | if (version == 4) { |
578 | if (nfss->port != NFS_PORT) | |
579 | seq_printf(m, ",port=%u", nfss->port); | |
580 | } else | |
581 | if (nfss->port) | |
582 | seq_printf(m, ",port=%u", nfss->port); | |
583 | ||
33170233 TM |
584 | seq_printf(m, ",timeo=%lu", 10U * nfss->client->cl_timeout->to_initval / HZ); |
585 | seq_printf(m, ",retrans=%u", nfss->client->cl_timeout->to_retries); | |
81039f1f | 586 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
82d101d5 CL |
587 | |
588 | if (version != 4) | |
589 | nfs_show_mountd_options(m, nfss, showdefaults); | |
590 | ||
591 | #ifdef CONFIG_NFS_V4 | |
592 | if (clp->rpc_ops->version == 4) | |
593 | seq_printf(m, ",clientaddr=%s", clp->cl_ipaddr); | |
594 | #endif | |
b797cac7 DH |
595 | if (nfss->options & NFS_OPTION_FSCACHE) |
596 | seq_printf(m, ",fsc"); | |
f7b422b1 DH |
597 | } |
598 | ||
599 | /* | |
600 | * Describe the mount options on this VFS mountpoint | |
601 | */ | |
602 | static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) | |
603 | { | |
604 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
605 | ||
606 | nfs_show_mount_options(m, nfss, 0); | |
607 | ||
5d8515ca CL |
608 | seq_printf(m, ",addr=%s", |
609 | rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient, | |
610 | RPC_DISPLAY_ADDR)); | |
f7b422b1 DH |
611 | |
612 | return 0; | |
613 | } | |
614 | ||
615 | /* | |
616 | * Present statistical information for this VFS mountpoint | |
617 | */ | |
618 | static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) | |
619 | { | |
620 | int i, cpu; | |
621 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
622 | struct rpc_auth *auth = nfss->client->cl_auth; | |
623 | struct nfs_iostats totals = { }; | |
624 | ||
625 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
626 | ||
627 | /* | |
628 | * Display all mount option settings | |
629 | */ | |
630 | seq_printf(m, "\n\topts:\t"); | |
631 | seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw"); | |
632 | seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); | |
633 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : ""); | |
634 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); | |
635 | nfs_show_mount_options(m, nfss, 1); | |
636 | ||
637 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); | |
638 | ||
639 | seq_printf(m, "\n\tcaps:\t"); | |
640 | seq_printf(m, "caps=0x%x", nfss->caps); | |
2d767432 CL |
641 | seq_printf(m, ",wtmult=%u", nfss->wtmult); |
642 | seq_printf(m, ",dtsize=%u", nfss->dtsize); | |
643 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
644 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
f7b422b1 DH |
645 | |
646 | #ifdef CONFIG_NFS_V4 | |
40c55319 | 647 | if (nfss->nfs_client->rpc_ops->version == 4) { |
f7b422b1 DH |
648 | seq_printf(m, "\n\tnfsv4:\t"); |
649 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); | |
650 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
651 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); | |
652 | } | |
653 | #endif | |
654 | ||
655 | /* | |
656 | * Display security flavor in effect for this mount | |
657 | */ | |
2d767432 | 658 | seq_printf(m, "\n\tsec:\tflavor=%u", auth->au_ops->au_flavor); |
f7b422b1 | 659 | if (auth->au_flavor) |
2d767432 | 660 | seq_printf(m, ",pseudoflavor=%u", auth->au_flavor); |
f7b422b1 DH |
661 | |
662 | /* | |
663 | * Display superblock I/O counters | |
664 | */ | |
665 | for_each_possible_cpu(cpu) { | |
666 | struct nfs_iostats *stats; | |
667 | ||
668 | preempt_disable(); | |
669 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
670 | ||
671 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
672 | totals.events[i] += stats->events[i]; | |
673 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
674 | totals.bytes[i] += stats->bytes[i]; | |
6a51091d DH |
675 | #ifdef CONFIG_NFS_FSCACHE |
676 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
677 | totals.fscache[i] += stats->fscache[i]; | |
678 | #endif | |
f7b422b1 DH |
679 | |
680 | preempt_enable(); | |
681 | } | |
682 | ||
683 | seq_printf(m, "\n\tevents:\t"); | |
684 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
685 | seq_printf(m, "%lu ", totals.events[i]); | |
686 | seq_printf(m, "\n\tbytes:\t"); | |
687 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
688 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
6a51091d DH |
689 | #ifdef CONFIG_NFS_FSCACHE |
690 | if (nfss->options & NFS_OPTION_FSCACHE) { | |
691 | seq_printf(m, "\n\tfsc:\t"); | |
692 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
693 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
694 | } | |
695 | #endif | |
f7b422b1 DH |
696 | seq_printf(m, "\n"); |
697 | ||
698 | rpc_print_iostats(m, nfss->client); | |
699 | ||
700 | return 0; | |
701 | } | |
702 | ||
703 | /* | |
704 | * Begin unmount by attempting to remove all automounted mountpoints we added | |
54ceac45 | 705 | * in response to xdev traversals and referrals |
f7b422b1 | 706 | */ |
42faad99 | 707 | static void nfs_umount_begin(struct super_block *sb) |
f7b422b1 | 708 | { |
67e55205 | 709 | struct nfs_server *server; |
fc6ae3cf TM |
710 | struct rpc_clnt *rpc; |
711 | ||
67e55205 AIB |
712 | lock_kernel(); |
713 | ||
714 | server = NFS_SB(sb); | |
fc6ae3cf TM |
715 | /* -EIO all pending I/O */ |
716 | rpc = server->client_acl; | |
717 | if (!IS_ERR(rpc)) | |
718 | rpc_killall_tasks(rpc); | |
719 | rpc = server->client; | |
720 | if (!IS_ERR(rpc)) | |
721 | rpc_killall_tasks(rpc); | |
67e55205 AIB |
722 | |
723 | unlock_kernel(); | |
f7b422b1 DH |
724 | } |
725 | ||
fc50d58f | 726 | /* |
cdcd7f9a CL |
727 | * Sanity-check a server address provided by the mount command. |
728 | * | |
729 | * Address family must be initialized, and address must not be | |
730 | * the ANY address for that family. | |
fc50d58f CL |
731 | */ |
732 | static int nfs_verify_server_address(struct sockaddr *addr) | |
733 | { | |
734 | switch (addr->sa_family) { | |
735 | case AF_INET: { | |
cdcd7f9a | 736 | struct sockaddr_in *sa = (struct sockaddr_in *)addr; |
e6f1cebf | 737 | return sa->sin_addr.s_addr != htonl(INADDR_ANY); |
cdcd7f9a CL |
738 | } |
739 | case AF_INET6: { | |
740 | struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr; | |
741 | return !ipv6_addr_any(sa); | |
fc50d58f CL |
742 | } |
743 | } | |
744 | ||
53a0b9c4 | 745 | dfprintk(MOUNT, "NFS: Invalid IP address specified\n"); |
fc50d58f CL |
746 | return 0; |
747 | } | |
748 | ||
259875ef TM |
749 | /* |
750 | * Sanity check the NFS transport protocol. | |
751 | * | |
752 | */ | |
753 | static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
754 | { | |
755 | switch (mnt->nfs_server.protocol) { | |
756 | case XPRT_TRANSPORT_UDP: | |
757 | case XPRT_TRANSPORT_TCP: | |
758 | case XPRT_TRANSPORT_RDMA: | |
759 | break; | |
760 | default: | |
761 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; | |
762 | } | |
763 | } | |
764 | ||
765 | /* | |
766 | * For text based NFSv2/v3 mounts, the mount protocol transport default | |
767 | * settings should depend upon the specified NFS transport. | |
768 | */ | |
769 | static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
770 | { | |
771 | nfs_validate_transport_protocol(mnt); | |
772 | ||
773 | if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP || | |
774 | mnt->mount_server.protocol == XPRT_TRANSPORT_TCP) | |
775 | return; | |
776 | switch (mnt->nfs_server.protocol) { | |
777 | case XPRT_TRANSPORT_UDP: | |
778 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; | |
779 | break; | |
780 | case XPRT_TRANSPORT_TCP: | |
781 | case XPRT_TRANSPORT_RDMA: | |
782 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; | |
783 | } | |
784 | } | |
785 | ||
01060c89 CL |
786 | /* |
787 | * Parse the value of the 'sec=' option. | |
01060c89 CL |
788 | */ |
789 | static int nfs_parse_security_flavors(char *value, | |
790 | struct nfs_parsed_mount_data *mnt) | |
791 | { | |
792 | substring_t args[MAX_OPT_ARGS]; | |
793 | ||
794 | dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); | |
795 | ||
796 | switch (match_token(value, nfs_secflavor_tokens, args)) { | |
797 | case Opt_sec_none: | |
01060c89 CL |
798 | mnt->auth_flavors[0] = RPC_AUTH_NULL; |
799 | break; | |
800 | case Opt_sec_sys: | |
01060c89 CL |
801 | mnt->auth_flavors[0] = RPC_AUTH_UNIX; |
802 | break; | |
803 | case Opt_sec_krb5: | |
01060c89 CL |
804 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5; |
805 | break; | |
806 | case Opt_sec_krb5i: | |
01060c89 CL |
807 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I; |
808 | break; | |
809 | case Opt_sec_krb5p: | |
01060c89 CL |
810 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P; |
811 | break; | |
812 | case Opt_sec_lkey: | |
01060c89 CL |
813 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY; |
814 | break; | |
815 | case Opt_sec_lkeyi: | |
01060c89 CL |
816 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI; |
817 | break; | |
818 | case Opt_sec_lkeyp: | |
01060c89 CL |
819 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP; |
820 | break; | |
821 | case Opt_sec_spkm: | |
01060c89 CL |
822 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM; |
823 | break; | |
824 | case Opt_sec_spkmi: | |
01060c89 CL |
825 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI; |
826 | break; | |
827 | case Opt_sec_spkmp: | |
01060c89 CL |
828 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP; |
829 | break; | |
830 | default: | |
831 | return 0; | |
832 | } | |
833 | ||
059f90b3 | 834 | mnt->auth_flavor_len = 1; |
01060c89 CL |
835 | return 1; |
836 | } | |
837 | ||
bf0fd768 CL |
838 | /* |
839 | * Error-check and convert a string of mount options from user space into | |
f45663ce CL |
840 | * a data structure. The whole mount string is processed; bad options are |
841 | * skipped as they are encountered. If there were no errors, return 1; | |
842 | * otherwise return 0 (zero). | |
bf0fd768 CL |
843 | */ |
844 | static int nfs_parse_mount_options(char *raw, | |
845 | struct nfs_parsed_mount_data *mnt) | |
846 | { | |
f9c3a380 | 847 | char *p, *string, *secdata; |
d23c45fd | 848 | int rc, sloppy = 0, invalid_option = 0; |
bf0fd768 CL |
849 | |
850 | if (!raw) { | |
851 | dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); | |
852 | return 1; | |
853 | } | |
854 | dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); | |
855 | ||
f9c3a380 EP |
856 | secdata = alloc_secdata(); |
857 | if (!secdata) | |
858 | goto out_nomem; | |
859 | ||
860 | rc = security_sb_copy_data(raw, secdata); | |
861 | if (rc) | |
862 | goto out_security_failure; | |
863 | ||
864 | rc = security_sb_parse_opts_str(secdata, &mnt->lsm_opts); | |
865 | if (rc) | |
866 | goto out_security_failure; | |
867 | ||
868 | free_secdata(secdata); | |
869 | ||
bf0fd768 CL |
870 | while ((p = strsep(&raw, ",")) != NULL) { |
871 | substring_t args[MAX_OPT_ARGS]; | |
a5a16bae CL |
872 | unsigned long option; |
873 | int token; | |
bf0fd768 CL |
874 | |
875 | if (!*p) | |
876 | continue; | |
877 | ||
878 | dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); | |
879 | ||
880 | token = match_token(p, nfs_mount_option_tokens, args); | |
881 | switch (token) { | |
f45663ce CL |
882 | |
883 | /* | |
884 | * boolean options: foo/nofoo | |
885 | */ | |
bf0fd768 CL |
886 | case Opt_soft: |
887 | mnt->flags |= NFS_MOUNT_SOFT; | |
888 | break; | |
889 | case Opt_hard: | |
890 | mnt->flags &= ~NFS_MOUNT_SOFT; | |
891 | break; | |
bf0fd768 CL |
892 | case Opt_posix: |
893 | mnt->flags |= NFS_MOUNT_POSIX; | |
894 | break; | |
895 | case Opt_noposix: | |
896 | mnt->flags &= ~NFS_MOUNT_POSIX; | |
897 | break; | |
898 | case Opt_cto: | |
899 | mnt->flags &= ~NFS_MOUNT_NOCTO; | |
900 | break; | |
901 | case Opt_nocto: | |
902 | mnt->flags |= NFS_MOUNT_NOCTO; | |
903 | break; | |
904 | case Opt_ac: | |
905 | mnt->flags &= ~NFS_MOUNT_NOAC; | |
906 | break; | |
907 | case Opt_noac: | |
908 | mnt->flags |= NFS_MOUNT_NOAC; | |
909 | break; | |
910 | case Opt_lock: | |
911 | mnt->flags &= ~NFS_MOUNT_NONLM; | |
912 | break; | |
913 | case Opt_nolock: | |
914 | mnt->flags |= NFS_MOUNT_NONLM; | |
915 | break; | |
916 | case Opt_v2: | |
917 | mnt->flags &= ~NFS_MOUNT_VER3; | |
918 | break; | |
919 | case Opt_v3: | |
920 | mnt->flags |= NFS_MOUNT_VER3; | |
921 | break; | |
922 | case Opt_udp: | |
923 | mnt->flags &= ~NFS_MOUNT_TCP; | |
0896a725 | 924 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 CL |
925 | break; |
926 | case Opt_tcp: | |
927 | mnt->flags |= NFS_MOUNT_TCP; | |
0896a725 | 928 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 929 | break; |
2cf7ff7a TT |
930 | case Opt_rdma: |
931 | mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ | |
932 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 933 | xprt_load_transport(p); |
2cf7ff7a | 934 | break; |
bf0fd768 CL |
935 | case Opt_acl: |
936 | mnt->flags &= ~NFS_MOUNT_NOACL; | |
937 | break; | |
938 | case Opt_noacl: | |
939 | mnt->flags |= NFS_MOUNT_NOACL; | |
940 | break; | |
941 | case Opt_rdirplus: | |
942 | mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; | |
943 | break; | |
944 | case Opt_nordirplus: | |
945 | mnt->flags |= NFS_MOUNT_NORDIRPLUS; | |
946 | break; | |
75180df2 TM |
947 | case Opt_sharecache: |
948 | mnt->flags &= ~NFS_MOUNT_UNSHARED; | |
949 | break; | |
950 | case Opt_nosharecache: | |
951 | mnt->flags |= NFS_MOUNT_UNSHARED; | |
952 | break; | |
d740351b CL |
953 | case Opt_resvport: |
954 | mnt->flags &= ~NFS_MOUNT_NORESVPORT; | |
955 | break; | |
956 | case Opt_noresvport: | |
957 | mnt->flags |= NFS_MOUNT_NORESVPORT; | |
958 | break; | |
b797cac7 DH |
959 | case Opt_fscache: |
960 | mnt->options |= NFS_OPTION_FSCACHE; | |
961 | kfree(mnt->fscache_uniq); | |
962 | mnt->fscache_uniq = NULL; | |
963 | break; | |
964 | case Opt_nofscache: | |
965 | mnt->options &= ~NFS_OPTION_FSCACHE; | |
966 | kfree(mnt->fscache_uniq); | |
967 | mnt->fscache_uniq = NULL; | |
968 | break; | |
969 | case Opt_fscache_uniq: | |
970 | string = match_strdup(args); | |
971 | if (!string) | |
972 | goto out_nomem; | |
973 | kfree(mnt->fscache_uniq); | |
974 | mnt->fscache_uniq = string; | |
975 | mnt->options |= NFS_OPTION_FSCACHE; | |
976 | break; | |
bf0fd768 | 977 | |
f45663ce CL |
978 | /* |
979 | * options that take numeric values | |
980 | */ | |
bf0fd768 | 981 | case Opt_port: |
a5a16bae CL |
982 | string = match_strdup(args); |
983 | if (string == NULL) | |
984 | goto out_nomem; | |
985 | rc = strict_strtoul(string, 10, &option); | |
986 | kfree(string); | |
987 | if (rc != 0 || option > USHORT_MAX) | |
d23c45fd CL |
988 | goto out_invalid_value; |
989 | mnt->nfs_server.port = option; | |
bf0fd768 CL |
990 | break; |
991 | case Opt_rsize: | |
a5a16bae CL |
992 | string = match_strdup(args); |
993 | if (string == NULL) | |
994 | goto out_nomem; | |
995 | rc = strict_strtoul(string, 10, &option); | |
996 | kfree(string); | |
997 | if (rc != 0) | |
d23c45fd CL |
998 | goto out_invalid_value; |
999 | mnt->rsize = option; | |
bf0fd768 CL |
1000 | break; |
1001 | case Opt_wsize: | |
a5a16bae CL |
1002 | string = match_strdup(args); |
1003 | if (string == NULL) | |
1004 | goto out_nomem; | |
1005 | rc = strict_strtoul(string, 10, &option); | |
1006 | kfree(string); | |
1007 | if (rc != 0) | |
d23c45fd CL |
1008 | goto out_invalid_value; |
1009 | mnt->wsize = option; | |
bf0fd768 CL |
1010 | break; |
1011 | case Opt_bsize: | |
a5a16bae CL |
1012 | string = match_strdup(args); |
1013 | if (string == NULL) | |
1014 | goto out_nomem; | |
1015 | rc = strict_strtoul(string, 10, &option); | |
1016 | kfree(string); | |
1017 | if (rc != 0) | |
d23c45fd CL |
1018 | goto out_invalid_value; |
1019 | mnt->bsize = option; | |
bf0fd768 CL |
1020 | break; |
1021 | case Opt_timeo: | |
a5a16bae CL |
1022 | string = match_strdup(args); |
1023 | if (string == NULL) | |
1024 | goto out_nomem; | |
1025 | rc = strict_strtoul(string, 10, &option); | |
1026 | kfree(string); | |
1027 | if (rc != 0 || option == 0) | |
d23c45fd CL |
1028 | goto out_invalid_value; |
1029 | mnt->timeo = option; | |
bf0fd768 CL |
1030 | break; |
1031 | case Opt_retrans: | |
a5a16bae CL |
1032 | string = match_strdup(args); |
1033 | if (string == NULL) | |
1034 | goto out_nomem; | |
1035 | rc = strict_strtoul(string, 10, &option); | |
1036 | kfree(string); | |
1037 | if (rc != 0 || option == 0) | |
d23c45fd CL |
1038 | goto out_invalid_value; |
1039 | mnt->retrans = option; | |
bf0fd768 CL |
1040 | break; |
1041 | case Opt_acregmin: | |
a5a16bae CL |
1042 | string = match_strdup(args); |
1043 | if (string == NULL) | |
1044 | goto out_nomem; | |
1045 | rc = strict_strtoul(string, 10, &option); | |
1046 | kfree(string); | |
1047 | if (rc != 0) | |
d23c45fd CL |
1048 | goto out_invalid_value; |
1049 | mnt->acregmin = option; | |
bf0fd768 CL |
1050 | break; |
1051 | case Opt_acregmax: | |
a5a16bae CL |
1052 | string = match_strdup(args); |
1053 | if (string == NULL) | |
1054 | goto out_nomem; | |
1055 | rc = strict_strtoul(string, 10, &option); | |
1056 | kfree(string); | |
1057 | if (rc != 0) | |
d23c45fd CL |
1058 | goto out_invalid_value; |
1059 | mnt->acregmax = option; | |
bf0fd768 CL |
1060 | break; |
1061 | case Opt_acdirmin: | |
a5a16bae CL |
1062 | string = match_strdup(args); |
1063 | if (string == NULL) | |
1064 | goto out_nomem; | |
1065 | rc = strict_strtoul(string, 10, &option); | |
1066 | kfree(string); | |
1067 | if (rc != 0) | |
d23c45fd CL |
1068 | goto out_invalid_value; |
1069 | mnt->acdirmin = option; | |
bf0fd768 CL |
1070 | break; |
1071 | case Opt_acdirmax: | |
a5a16bae CL |
1072 | string = match_strdup(args); |
1073 | if (string == NULL) | |
1074 | goto out_nomem; | |
1075 | rc = strict_strtoul(string, 10, &option); | |
1076 | kfree(string); | |
1077 | if (rc != 0) | |
d23c45fd CL |
1078 | goto out_invalid_value; |
1079 | mnt->acdirmax = option; | |
bf0fd768 CL |
1080 | break; |
1081 | case Opt_actimeo: | |
a5a16bae CL |
1082 | string = match_strdup(args); |
1083 | if (string == NULL) | |
1084 | goto out_nomem; | |
1085 | rc = strict_strtoul(string, 10, &option); | |
1086 | kfree(string); | |
1087 | if (rc != 0) | |
d23c45fd CL |
1088 | goto out_invalid_value; |
1089 | mnt->acregmin = mnt->acregmax = | |
1090 | mnt->acdirmin = mnt->acdirmax = option; | |
bf0fd768 CL |
1091 | break; |
1092 | case Opt_namelen: | |
a5a16bae CL |
1093 | string = match_strdup(args); |
1094 | if (string == NULL) | |
1095 | goto out_nomem; | |
1096 | rc = strict_strtoul(string, 10, &option); | |
1097 | kfree(string); | |
1098 | if (rc != 0) | |
d23c45fd CL |
1099 | goto out_invalid_value; |
1100 | mnt->namlen = option; | |
bf0fd768 CL |
1101 | break; |
1102 | case Opt_mountport: | |
a5a16bae CL |
1103 | string = match_strdup(args); |
1104 | if (string == NULL) | |
1105 | goto out_nomem; | |
1106 | rc = strict_strtoul(string, 10, &option); | |
1107 | kfree(string); | |
1108 | if (rc != 0 || option > USHORT_MAX) | |
d23c45fd CL |
1109 | goto out_invalid_value; |
1110 | mnt->mount_server.port = option; | |
bf0fd768 | 1111 | break; |
bf0fd768 | 1112 | case Opt_mountvers: |
a5a16bae CL |
1113 | string = match_strdup(args); |
1114 | if (string == NULL) | |
1115 | goto out_nomem; | |
1116 | rc = strict_strtoul(string, 10, &option); | |
1117 | kfree(string); | |
1118 | if (rc != 0 || | |
f45663ce | 1119 | option < NFS_MNT_VERSION || |
d23c45fd CL |
1120 | option > NFS_MNT3_VERSION) |
1121 | goto out_invalid_value; | |
1122 | mnt->mount_server.version = option; | |
bf0fd768 | 1123 | break; |
bf0fd768 | 1124 | case Opt_nfsvers: |
a5a16bae CL |
1125 | string = match_strdup(args); |
1126 | if (string == NULL) | |
1127 | goto out_nomem; | |
1128 | rc = strict_strtoul(string, 10, &option); | |
1129 | kfree(string); | |
1130 | if (rc != 0) | |
d23c45fd | 1131 | goto out_invalid_value; |
bf0fd768 | 1132 | switch (option) { |
f45663ce | 1133 | case NFS2_VERSION: |
bf0fd768 CL |
1134 | mnt->flags &= ~NFS_MOUNT_VER3; |
1135 | break; | |
f45663ce | 1136 | case NFS3_VERSION: |
bf0fd768 CL |
1137 | mnt->flags |= NFS_MOUNT_VER3; |
1138 | break; | |
1139 | default: | |
d23c45fd | 1140 | goto out_invalid_value; |
bf0fd768 CL |
1141 | } |
1142 | break; | |
3fd5be9e | 1143 | case Opt_minorversion: |
f3f4f4ed CL |
1144 | string = match_strdup(args); |
1145 | if (string == NULL) | |
1146 | goto out_nomem; | |
1147 | rc = strict_strtoul(string, 10, &option); | |
1148 | kfree(string); | |
1149 | if (rc != 0) | |
1150 | goto out_invalid_value; | |
1151 | if (option > NFS4_MAX_MINOR_VERSION) | |
1152 | goto out_invalid_value; | |
1153 | mnt->minorversion = option; | |
3fd5be9e | 1154 | break; |
bf0fd768 | 1155 | |
f45663ce CL |
1156 | /* |
1157 | * options that take text values | |
1158 | */ | |
bf0fd768 CL |
1159 | case Opt_sec: |
1160 | string = match_strdup(args); | |
1161 | if (string == NULL) | |
1162 | goto out_nomem; | |
01060c89 | 1163 | rc = nfs_parse_security_flavors(string, mnt); |
bf0fd768 | 1164 | kfree(string); |
f45663ce | 1165 | if (!rc) { |
f45663ce CL |
1166 | dfprintk(MOUNT, "NFS: unrecognized " |
1167 | "security flavor\n"); | |
d23c45fd | 1168 | return 0; |
f45663ce | 1169 | } |
bf0fd768 CL |
1170 | break; |
1171 | case Opt_proto: | |
1172 | string = match_strdup(args); | |
1173 | if (string == NULL) | |
1174 | goto out_nomem; | |
1175 | token = match_token(string, | |
1176 | nfs_xprt_protocol_tokens, args); | |
bf0fd768 CL |
1177 | |
1178 | switch (token) { | |
fdb66ff4 | 1179 | case Opt_xprt_udp: |
bf0fd768 | 1180 | mnt->flags &= ~NFS_MOUNT_TCP; |
0896a725 | 1181 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
d23c45fd | 1182 | kfree(string); |
bf0fd768 | 1183 | break; |
fdb66ff4 | 1184 | case Opt_xprt_tcp: |
bf0fd768 | 1185 | mnt->flags |= NFS_MOUNT_TCP; |
0896a725 | 1186 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
d23c45fd | 1187 | kfree(string); |
bf0fd768 | 1188 | break; |
2cf7ff7a TT |
1189 | case Opt_xprt_rdma: |
1190 | /* vector side protocols to TCP */ | |
1191 | mnt->flags |= NFS_MOUNT_TCP; | |
1192 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 1193 | xprt_load_transport(string); |
d23c45fd | 1194 | kfree(string); |
2cf7ff7a | 1195 | break; |
bf0fd768 | 1196 | default: |
f45663ce CL |
1197 | dfprintk(MOUNT, "NFS: unrecognized " |
1198 | "transport protocol\n"); | |
d23c45fd | 1199 | return 0; |
bf0fd768 CL |
1200 | } |
1201 | break; | |
1202 | case Opt_mountproto: | |
1203 | string = match_strdup(args); | |
1204 | if (string == NULL) | |
1205 | goto out_nomem; | |
1206 | token = match_token(string, | |
1207 | nfs_xprt_protocol_tokens, args); | |
d508afb4 | 1208 | kfree(string); |
bf0fd768 CL |
1209 | |
1210 | switch (token) { | |
fdb66ff4 | 1211 | case Opt_xprt_udp: |
0896a725 | 1212 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 | 1213 | break; |
fdb66ff4 | 1214 | case Opt_xprt_tcp: |
0896a725 | 1215 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1216 | break; |
2cf7ff7a | 1217 | case Opt_xprt_rdma: /* not used for side protocols */ |
bf0fd768 | 1218 | default: |
f45663ce CL |
1219 | dfprintk(MOUNT, "NFS: unrecognized " |
1220 | "transport protocol\n"); | |
d23c45fd | 1221 | return 0; |
bf0fd768 CL |
1222 | } |
1223 | break; | |
1224 | case Opt_addr: | |
1225 | string = match_strdup(args); | |
1226 | if (string == NULL) | |
1227 | goto out_nomem; | |
53a0b9c4 CL |
1228 | mnt->nfs_server.addrlen = |
1229 | rpc_pton(string, strlen(string), | |
1230 | (struct sockaddr *) | |
1231 | &mnt->nfs_server.address, | |
1232 | sizeof(mnt->nfs_server.address)); | |
bf0fd768 | 1233 | kfree(string); |
53a0b9c4 CL |
1234 | if (mnt->nfs_server.addrlen == 0) |
1235 | goto out_invalid_address; | |
bf0fd768 CL |
1236 | break; |
1237 | case Opt_clientaddr: | |
1238 | string = match_strdup(args); | |
1239 | if (string == NULL) | |
1240 | goto out_nomem; | |
fc601477 | 1241 | kfree(mnt->client_address); |
bf0fd768 CL |
1242 | mnt->client_address = string; |
1243 | break; | |
33832034 CL |
1244 | case Opt_mounthost: |
1245 | string = match_strdup(args); | |
1246 | if (string == NULL) | |
1247 | goto out_nomem; | |
fc601477 | 1248 | kfree(mnt->mount_server.hostname); |
33832034 CL |
1249 | mnt->mount_server.hostname = string; |
1250 | break; | |
0ac83779 | 1251 | case Opt_mountaddr: |
bf0fd768 CL |
1252 | string = match_strdup(args); |
1253 | if (string == NULL) | |
1254 | goto out_nomem; | |
53a0b9c4 CL |
1255 | mnt->mount_server.addrlen = |
1256 | rpc_pton(string, strlen(string), | |
1257 | (struct sockaddr *) | |
1258 | &mnt->mount_server.address, | |
1259 | sizeof(mnt->mount_server.address)); | |
bf0fd768 | 1260 | kfree(string); |
53a0b9c4 CL |
1261 | if (mnt->mount_server.addrlen == 0) |
1262 | goto out_invalid_address; | |
bf0fd768 | 1263 | break; |
7973c1f1 TM |
1264 | case Opt_lookupcache: |
1265 | string = match_strdup(args); | |
1266 | if (string == NULL) | |
1267 | goto out_nomem; | |
1268 | token = match_token(string, | |
1269 | nfs_lookupcache_tokens, args); | |
1270 | kfree(string); | |
1271 | switch (token) { | |
1272 | case Opt_lookupcache_all: | |
1273 | mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); | |
1274 | break; | |
1275 | case Opt_lookupcache_positive: | |
1276 | mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1277 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; | |
1278 | break; | |
1279 | case Opt_lookupcache_none: | |
1280 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1281 | break; | |
1282 | default: | |
7973c1f1 TM |
1283 | dfprintk(MOUNT, "NFS: invalid " |
1284 | "lookupcache argument\n"); | |
d23c45fd | 1285 | return 0; |
7973c1f1 TM |
1286 | }; |
1287 | break; | |
bf0fd768 | 1288 | |
f45663ce CL |
1289 | /* |
1290 | * Special options | |
1291 | */ | |
1292 | case Opt_sloppy: | |
1293 | sloppy = 1; | |
1294 | dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); | |
1295 | break; | |
bf0fd768 CL |
1296 | case Opt_userspace: |
1297 | case Opt_deprecated: | |
d33e4dfe CL |
1298 | dfprintk(MOUNT, "NFS: ignoring mount option " |
1299 | "'%s'\n", p); | |
bf0fd768 CL |
1300 | break; |
1301 | ||
1302 | default: | |
d23c45fd | 1303 | invalid_option = 1; |
f45663ce CL |
1304 | dfprintk(MOUNT, "NFS: unrecognized mount option " |
1305 | "'%s'\n", p); | |
bf0fd768 CL |
1306 | } |
1307 | } | |
1308 | ||
d23c45fd CL |
1309 | if (!sloppy && invalid_option) |
1310 | return 0; | |
1311 | ||
bf0fd768 CL |
1312 | return 1; |
1313 | ||
53a0b9c4 CL |
1314 | out_invalid_address: |
1315 | printk(KERN_INFO "NFS: bad IP address specified: %s\n", p); | |
1316 | return 0; | |
d23c45fd | 1317 | out_invalid_value: |
53a0b9c4 | 1318 | printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); |
d23c45fd | 1319 | return 0; |
bf0fd768 CL |
1320 | out_nomem: |
1321 | printk(KERN_INFO "NFS: not enough memory to parse option\n"); | |
1322 | return 0; | |
f9c3a380 EP |
1323 | out_security_failure: |
1324 | free_secdata(secdata); | |
1325 | printk(KERN_INFO "NFS: security options invalid: %d\n", rc); | |
1326 | return 0; | |
bf0fd768 CL |
1327 | } |
1328 | ||
ec88f28d CL |
1329 | /* |
1330 | * Match the requested auth flavors with the list returned by | |
1331 | * the server. Returns zero and sets the mount's authentication | |
1332 | * flavor on success; returns -EACCES if server does not support | |
1333 | * the requested flavor. | |
1334 | */ | |
1335 | static int nfs_walk_authlist(struct nfs_parsed_mount_data *args, | |
1336 | struct nfs_mount_request *request) | |
1337 | { | |
1338 | unsigned int i, j, server_authlist_len = *(request->auth_flav_len); | |
1339 | ||
5eecfde6 CL |
1340 | /* |
1341 | * Certain releases of Linux's mountd return an empty | |
1342 | * flavor list. To prevent behavioral regression with | |
1343 | * these servers (ie. rejecting mounts that used to | |
1344 | * succeed), revert to pre-2.6.32 behavior (no checking) | |
1345 | * if the returned flavor list is empty. | |
1346 | */ | |
1347 | if (server_authlist_len == 0) | |
1348 | return 0; | |
1349 | ||
ec88f28d CL |
1350 | /* |
1351 | * We avoid sophisticated negotiating here, as there are | |
1352 | * plenty of cases where we can get it wrong, providing | |
1353 | * either too little or too much security. | |
1354 | * | |
1355 | * RFC 2623, section 2.7 suggests we SHOULD prefer the | |
1356 | * flavor listed first. However, some servers list | |
1357 | * AUTH_NULL first. Our caller plants AUTH_SYS, the | |
1358 | * preferred default, in args->auth_flavors[0] if user | |
1359 | * didn't specify sec= mount option. | |
1360 | */ | |
1361 | for (i = 0; i < args->auth_flavor_len; i++) | |
1362 | for (j = 0; j < server_authlist_len; j++) | |
1363 | if (args->auth_flavors[i] == request->auth_flavs[j]) { | |
1364 | dfprintk(MOUNT, "NFS: using auth flavor %d\n", | |
1365 | request->auth_flavs[j]); | |
1366 | args->auth_flavors[0] = request->auth_flavs[j]; | |
1367 | return 0; | |
1368 | } | |
1369 | ||
1370 | dfprintk(MOUNT, "NFS: server does not support requested auth flavor\n"); | |
1371 | nfs_umount(request); | |
1372 | return -EACCES; | |
1373 | } | |
1374 | ||
0076d7b7 CL |
1375 | /* |
1376 | * Use the remote server's MOUNT service to request the NFS file handle | |
1377 | * corresponding to the provided path. | |
1378 | */ | |
1379 | static int nfs_try_mount(struct nfs_parsed_mount_data *args, | |
1380 | struct nfs_fh *root_fh) | |
1381 | { | |
ec88f28d CL |
1382 | rpc_authflavor_t server_authlist[NFS_MAX_SECFLAVORS]; |
1383 | unsigned int server_authlist_len = ARRAY_SIZE(server_authlist); | |
c5d120f8 CL |
1384 | struct nfs_mount_request request = { |
1385 | .sap = (struct sockaddr *) | |
1386 | &args->mount_server.address, | |
1387 | .dirpath = args->nfs_server.export_path, | |
1388 | .protocol = args->mount_server.protocol, | |
1389 | .fh = root_fh, | |
50a737f8 | 1390 | .noresvport = args->flags & NFS_MOUNT_NORESVPORT, |
ec88f28d CL |
1391 | .auth_flav_len = &server_authlist_len, |
1392 | .auth_flavs = server_authlist, | |
c5d120f8 | 1393 | }; |
4c568017 | 1394 | int status; |
0076d7b7 CL |
1395 | |
1396 | if (args->mount_server.version == 0) { | |
1397 | if (args->flags & NFS_MOUNT_VER3) | |
1398 | args->mount_server.version = NFS_MNT3_VERSION; | |
1399 | else | |
1400 | args->mount_server.version = NFS_MNT_VERSION; | |
1401 | } | |
c5d120f8 | 1402 | request.version = args->mount_server.version; |
0076d7b7 | 1403 | |
33832034 | 1404 | if (args->mount_server.hostname) |
c5d120f8 | 1405 | request.hostname = args->mount_server.hostname; |
33832034 | 1406 | else |
c5d120f8 | 1407 | request.hostname = args->nfs_server.hostname; |
33832034 | 1408 | |
0076d7b7 CL |
1409 | /* |
1410 | * Construct the mount server's address. | |
1411 | */ | |
4c568017 | 1412 | if (args->mount_server.address.ss_family == AF_UNSPEC) { |
c5d120f8 | 1413 | memcpy(request.sap, &args->nfs_server.address, |
4c568017 CL |
1414 | args->nfs_server.addrlen); |
1415 | args->mount_server.addrlen = args->nfs_server.addrlen; | |
1416 | } | |
c5d120f8 | 1417 | request.salen = args->mount_server.addrlen; |
4c568017 | 1418 | |
aad70007 JL |
1419 | /* |
1420 | * autobind will be used if mount_server.port == 0 | |
1421 | */ | |
ec6ee612 | 1422 | rpc_set_port(request.sap, args->mount_server.port); |
0076d7b7 CL |
1423 | |
1424 | /* | |
1425 | * Now ask the mount server to map our export path | |
1426 | * to a file handle. | |
1427 | */ | |
c5d120f8 | 1428 | status = nfs_mount(&request); |
ec88f28d CL |
1429 | if (status != 0) { |
1430 | dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n", | |
1431 | request.hostname, status); | |
1432 | return status; | |
1433 | } | |
0076d7b7 | 1434 | |
ec88f28d CL |
1435 | /* |
1436 | * MNTv1 (NFSv2) does not support auth flavor negotiation. | |
1437 | */ | |
1438 | if (args->mount_server.version != NFS_MNT3_VERSION) | |
1439 | return 0; | |
1440 | return nfs_walk_authlist(args, &request); | |
0076d7b7 CL |
1441 | } |
1442 | ||
d1aa0825 CL |
1443 | static int nfs_parse_simple_hostname(const char *dev_name, |
1444 | char **hostname, size_t maxnamlen, | |
1445 | char **export_path, size_t maxpathlen) | |
dc045898 CL |
1446 | { |
1447 | size_t len; | |
1448 | char *colon, *comma; | |
1449 | ||
1450 | colon = strchr(dev_name, ':'); | |
1451 | if (colon == NULL) | |
1452 | goto out_bad_devname; | |
1453 | ||
1454 | len = colon - dev_name; | |
1455 | if (len > maxnamlen) | |
1456 | goto out_hostname; | |
1457 | ||
1458 | /* N.B. caller will free nfs_server.hostname in all cases */ | |
1459 | *hostname = kstrndup(dev_name, len, GFP_KERNEL); | |
1460 | if (!*hostname) | |
1461 | goto out_nomem; | |
1462 | ||
1463 | /* kill possible hostname list: not supported */ | |
1464 | comma = strchr(*hostname, ','); | |
1465 | if (comma != NULL) { | |
1466 | if (comma == *hostname) | |
1467 | goto out_bad_devname; | |
1468 | *comma = '\0'; | |
1469 | } | |
1470 | ||
1471 | colon++; | |
1472 | len = strlen(colon); | |
1473 | if (len > maxpathlen) | |
1474 | goto out_path; | |
1475 | *export_path = kstrndup(colon, len, GFP_KERNEL); | |
1476 | if (!*export_path) | |
1477 | goto out_nomem; | |
1478 | ||
1479 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path); | |
1480 | return 0; | |
1481 | ||
1482 | out_bad_devname: | |
1483 | dfprintk(MOUNT, "NFS: device name not in host:path format\n"); | |
1484 | return -EINVAL; | |
1485 | ||
1486 | out_nomem: | |
1487 | dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); | |
1488 | return -ENOMEM; | |
1489 | ||
1490 | out_hostname: | |
1491 | dfprintk(MOUNT, "NFS: server hostname too long\n"); | |
1492 | return -ENAMETOOLONG; | |
1493 | ||
1494 | out_path: | |
1495 | dfprintk(MOUNT, "NFS: export pathname too long\n"); | |
1496 | return -ENAMETOOLONG; | |
1497 | } | |
1498 | ||
d1aa0825 CL |
1499 | /* |
1500 | * Hostname has square brackets around it because it contains one or | |
1501 | * more colons. We look for the first closing square bracket, and a | |
1502 | * colon must follow it. | |
1503 | */ | |
1504 | static int nfs_parse_protected_hostname(const char *dev_name, | |
1505 | char **hostname, size_t maxnamlen, | |
1506 | char **export_path, size_t maxpathlen) | |
1507 | { | |
1508 | size_t len; | |
1509 | char *start, *end; | |
1510 | ||
1511 | start = (char *)(dev_name + 1); | |
1512 | ||
1513 | end = strchr(start, ']'); | |
1514 | if (end == NULL) | |
1515 | goto out_bad_devname; | |
1516 | if (*(end + 1) != ':') | |
1517 | goto out_bad_devname; | |
1518 | ||
1519 | len = end - start; | |
1520 | if (len > maxnamlen) | |
1521 | goto out_hostname; | |
1522 | ||
1523 | /* N.B. caller will free nfs_server.hostname in all cases */ | |
1524 | *hostname = kstrndup(start, len, GFP_KERNEL); | |
1525 | if (*hostname == NULL) | |
1526 | goto out_nomem; | |
1527 | ||
1528 | end += 2; | |
1529 | len = strlen(end); | |
1530 | if (len > maxpathlen) | |
1531 | goto out_path; | |
1532 | *export_path = kstrndup(end, len, GFP_KERNEL); | |
1533 | if (!*export_path) | |
1534 | goto out_nomem; | |
1535 | ||
1536 | return 0; | |
1537 | ||
1538 | out_bad_devname: | |
1539 | dfprintk(MOUNT, "NFS: device name not in host:path format\n"); | |
1540 | return -EINVAL; | |
1541 | ||
1542 | out_nomem: | |
1543 | dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); | |
1544 | return -ENOMEM; | |
1545 | ||
1546 | out_hostname: | |
1547 | dfprintk(MOUNT, "NFS: server hostname too long\n"); | |
1548 | return -ENAMETOOLONG; | |
1549 | ||
1550 | out_path: | |
1551 | dfprintk(MOUNT, "NFS: export pathname too long\n"); | |
1552 | return -ENAMETOOLONG; | |
1553 | } | |
1554 | ||
1555 | /* | |
1556 | * Split "dev_name" into "hostname:export_path". | |
1557 | * | |
1558 | * The leftmost colon demarks the split between the server's hostname | |
1559 | * and the export path. If the hostname starts with a left square | |
1560 | * bracket, then it may contain colons. | |
1561 | * | |
1562 | * Note: caller frees hostname and export path, even on error. | |
1563 | */ | |
1564 | static int nfs_parse_devname(const char *dev_name, | |
1565 | char **hostname, size_t maxnamlen, | |
1566 | char **export_path, size_t maxpathlen) | |
1567 | { | |
1568 | if (*dev_name == '[') | |
1569 | return nfs_parse_protected_hostname(dev_name, | |
1570 | hostname, maxnamlen, | |
1571 | export_path, maxpathlen); | |
1572 | ||
1573 | return nfs_parse_simple_hostname(dev_name, | |
1574 | hostname, maxnamlen, | |
1575 | export_path, maxpathlen); | |
1576 | } | |
1577 | ||
f7b422b1 | 1578 | /* |
54ceac45 DH |
1579 | * Validate the NFS2/NFS3 mount data |
1580 | * - fills in the mount root filehandle | |
136d558c CL |
1581 | * |
1582 | * For option strings, user space handles the following behaviors: | |
1583 | * | |
1584 | * + DNS: mapping server host name to IP address ("addr=" option) | |
1585 | * | |
1586 | * + failure mode: how to behave if a mount request can't be handled | |
1587 | * immediately ("fg/bg" option) | |
1588 | * | |
1589 | * + retry: how often to retry a mount request ("retry=" option) | |
1590 | * | |
1591 | * + breaking back: trying proto=udp after proto=tcp, v2 after v3, | |
1592 | * mountproto=tcp after mountproto=udp, and so on | |
f7b422b1 | 1593 | */ |
2283f8d6 TT |
1594 | static int nfs_validate_mount_data(void *options, |
1595 | struct nfs_parsed_mount_data *args, | |
136d558c CL |
1596 | struct nfs_fh *mntfh, |
1597 | const char *dev_name) | |
f7b422b1 | 1598 | { |
2283f8d6 | 1599 | struct nfs_mount_data *data = (struct nfs_mount_data *)options; |
136d558c | 1600 | |
5df36e78 CL |
1601 | if (data == NULL) |
1602 | goto out_no_data; | |
f7b422b1 | 1603 | |
2283f8d6 TT |
1604 | args->flags = (NFS_MOUNT_VER3 | NFS_MOUNT_TCP); |
1605 | args->rsize = NFS_MAX_FILE_IO_SIZE; | |
1606 | args->wsize = NFS_MAX_FILE_IO_SIZE; | |
0e0cab74 CL |
1607 | args->acregmin = NFS_DEF_ACREGMIN; |
1608 | args->acregmax = NFS_DEF_ACREGMAX; | |
1609 | args->acdirmin = NFS_DEF_ACDIRMIN; | |
1610 | args->acdirmax = NFS_DEF_ACDIRMAX; | |
f22d6d79 | 1611 | args->mount_server.port = 0; /* autobind unless user sets port */ |
f22d6d79 | 1612 | args->nfs_server.port = 0; /* autobind unless user sets port */ |
0896a725 | 1613 | args->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
dd07c947 | 1614 | args->auth_flavors[0] = RPC_AUTH_UNIX; |
059f90b3 | 1615 | args->auth_flavor_len = 1; |
2283f8d6 | 1616 | |
54ceac45 | 1617 | switch (data->version) { |
5df36e78 CL |
1618 | case 1: |
1619 | data->namlen = 0; | |
1620 | case 2: | |
1621 | data->bsize = 0; | |
1622 | case 3: | |
1623 | if (data->flags & NFS_MOUNT_VER3) | |
1624 | goto out_no_v3; | |
1625 | data->root.size = NFS2_FHSIZE; | |
1626 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
1627 | case 4: | |
1628 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1629 | goto out_no_sec; | |
1630 | case 5: | |
1631 | memset(data->context, 0, sizeof(data->context)); | |
1632 | case 6: | |
b7e24457 TM |
1633 | if (data->flags & NFS_MOUNT_VER3) { |
1634 | if (data->root.size > NFS3_FHSIZE || data->root.size == 0) | |
1635 | goto out_invalid_fh; | |
5df36e78 | 1636 | mntfh->size = data->root.size; |
b7e24457 | 1637 | } else |
5df36e78 CL |
1638 | mntfh->size = NFS2_FHSIZE; |
1639 | ||
5df36e78 CL |
1640 | |
1641 | memcpy(mntfh->data, data->root.data, mntfh->size); | |
1642 | if (mntfh->size < sizeof(mntfh->data)) | |
1643 | memset(mntfh->data + mntfh->size, 0, | |
1644 | sizeof(mntfh->data) - mntfh->size); | |
6e88e061 | 1645 | |
2283f8d6 TT |
1646 | /* |
1647 | * Translate to nfs_parsed_mount_data, which nfs_fill_super | |
1648 | * can deal with. | |
1649 | */ | |
ff3525a5 | 1650 | args->flags = data->flags & NFS_MOUNT_FLAGMASK; |
2283f8d6 TT |
1651 | args->rsize = data->rsize; |
1652 | args->wsize = data->wsize; | |
2283f8d6 TT |
1653 | args->timeo = data->timeo; |
1654 | args->retrans = data->retrans; | |
1655 | args->acregmin = data->acregmin; | |
1656 | args->acregmax = data->acregmax; | |
1657 | args->acdirmin = data->acdirmin; | |
1658 | args->acdirmax = data->acdirmax; | |
4c568017 CL |
1659 | |
1660 | memcpy(&args->nfs_server.address, &data->addr, | |
1661 | sizeof(data->addr)); | |
1662 | args->nfs_server.addrlen = sizeof(data->addr); | |
1663 | if (!nfs_verify_server_address((struct sockaddr *) | |
1664 | &args->nfs_server.address)) | |
1665 | goto out_no_address; | |
1666 | ||
2283f8d6 | 1667 | if (!(data->flags & NFS_MOUNT_TCP)) |
0896a725 | 1668 | args->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
2283f8d6 TT |
1669 | /* N.B. caller will free nfs_server.hostname in all cases */ |
1670 | args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); | |
1671 | args->namlen = data->namlen; | |
1672 | args->bsize = data->bsize; | |
dd07c947 CL |
1673 | |
1674 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1675 | args->auth_flavors[0] = data->pseudoflavor; | |
63649bd7 CG |
1676 | if (!args->nfs_server.hostname) |
1677 | goto out_nomem; | |
f9c3a380 EP |
1678 | |
1679 | /* | |
1680 | * The legacy version 6 binary mount data from userspace has a | |
1681 | * field used only to transport selinux information into the | |
1682 | * the kernel. To continue to support that functionality we | |
1683 | * have a touch of selinux knowledge here in the NFS code. The | |
1684 | * userspace code converted context=blah to just blah so we are | |
1685 | * converting back to the full string selinux understands. | |
1686 | */ | |
1687 | if (data->context[0]){ | |
1688 | #ifdef CONFIG_SECURITY_SELINUX | |
1689 | int rc; | |
1690 | char *opts_str = kmalloc(sizeof(data->context) + 8, GFP_KERNEL); | |
1691 | if (!opts_str) | |
1692 | return -ENOMEM; | |
1693 | strcpy(opts_str, "context="); | |
1694 | data->context[NFS_MAX_CONTEXT_LEN] = '\0'; | |
1695 | strcat(opts_str, &data->context[0]); | |
1696 | rc = security_sb_parse_opts_str(opts_str, &args->lsm_opts); | |
1697 | kfree(opts_str); | |
1698 | if (rc) | |
1699 | return rc; | |
1700 | #else | |
1701 | return -EINVAL; | |
1702 | #endif | |
1703 | } | |
1704 | ||
5df36e78 | 1705 | break; |
136d558c | 1706 | default: { |
136d558c | 1707 | int status; |
136d558c | 1708 | |
2283f8d6 TT |
1709 | if (nfs_parse_mount_options((char *)options, args) == 0) |
1710 | return -EINVAL; | |
136d558c | 1711 | |
6e88e061 CL |
1712 | if (!nfs_verify_server_address((struct sockaddr *) |
1713 | &args->nfs_server.address)) | |
1714 | goto out_no_address; | |
1715 | ||
ec6ee612 | 1716 | rpc_set_port((struct sockaddr *)&args->nfs_server.address, |
ed596a8a CL |
1717 | args->nfs_server.port); |
1718 | ||
259875ef TM |
1719 | nfs_set_mount_transport_protocol(args); |
1720 | ||
dc045898 CL |
1721 | status = nfs_parse_devname(dev_name, |
1722 | &args->nfs_server.hostname, | |
1723 | PAGE_SIZE, | |
1724 | &args->nfs_server.export_path, | |
1725 | NFS_MAXPATHLEN); | |
1726 | if (!status) | |
1727 | status = nfs_try_mount(args, mntfh); | |
136d558c | 1728 | |
dc045898 CL |
1729 | kfree(args->nfs_server.export_path); |
1730 | args->nfs_server.export_path = NULL; | |
136d558c | 1731 | |
136d558c | 1732 | if (status) |
fdc6e2c8 | 1733 | return status; |
136d558c | 1734 | |
136d558c CL |
1735 | break; |
1736 | } | |
f7b422b1 | 1737 | } |
54ceac45 DH |
1738 | |
1739 | #ifndef CONFIG_NFS_V3 | |
2283f8d6 | 1740 | if (args->flags & NFS_MOUNT_VER3) |
5df36e78 CL |
1741 | goto out_v3_not_compiled; |
1742 | #endif /* !CONFIG_NFS_V3 */ | |
f7b422b1 | 1743 | |
5df36e78 | 1744 | return 0; |
f7b422b1 | 1745 | |
5df36e78 CL |
1746 | out_no_data: |
1747 | dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); | |
1748 | return -EINVAL; | |
54ceac45 | 1749 | |
5df36e78 CL |
1750 | out_no_v3: |
1751 | dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", | |
1752 | data->version); | |
1753 | return -EINVAL; | |
f7b422b1 | 1754 | |
5df36e78 CL |
1755 | out_no_sec: |
1756 | dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); | |
1757 | return -EINVAL; | |
1758 | ||
5df36e78 CL |
1759 | #ifndef CONFIG_NFS_V3 |
1760 | out_v3_not_compiled: | |
1761 | dfprintk(MOUNT, "NFS: NFSv3 is not compiled into kernel\n"); | |
1762 | return -EPROTONOSUPPORT; | |
1763 | #endif /* !CONFIG_NFS_V3 */ | |
1764 | ||
63649bd7 CG |
1765 | out_nomem: |
1766 | dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); | |
1767 | return -ENOMEM; | |
1768 | ||
5df36e78 CL |
1769 | out_no_address: |
1770 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); | |
1771 | return -EINVAL; | |
1772 | ||
1773 | out_invalid_fh: | |
1774 | dfprintk(MOUNT, "NFS: invalid root filehandle\n"); | |
1775 | return -EINVAL; | |
f7b422b1 DH |
1776 | } |
1777 | ||
48b605f8 JL |
1778 | static int |
1779 | nfs_compare_remount_data(struct nfs_server *nfss, | |
1780 | struct nfs_parsed_mount_data *data) | |
1781 | { | |
1782 | if (data->flags != nfss->flags || | |
1783 | data->rsize != nfss->rsize || | |
1784 | data->wsize != nfss->wsize || | |
1785 | data->retrans != nfss->client->cl_timeout->to_retries || | |
1786 | data->auth_flavors[0] != nfss->client->cl_auth->au_flavor || | |
1787 | data->acregmin != nfss->acregmin / HZ || | |
1788 | data->acregmax != nfss->acregmax / HZ || | |
1789 | data->acdirmin != nfss->acdirmin / HZ || | |
1790 | data->acdirmax != nfss->acdirmax / HZ || | |
1791 | data->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) || | |
1792 | data->nfs_server.addrlen != nfss->nfs_client->cl_addrlen || | |
1793 | memcmp(&data->nfs_server.address, &nfss->nfs_client->cl_addr, | |
1794 | data->nfs_server.addrlen) != 0) | |
1795 | return -EINVAL; | |
1796 | ||
1797 | return 0; | |
1798 | } | |
1799 | ||
1800 | static int | |
1801 | nfs_remount(struct super_block *sb, int *flags, char *raw_data) | |
1802 | { | |
1803 | int error; | |
1804 | struct nfs_server *nfss = sb->s_fs_info; | |
1805 | struct nfs_parsed_mount_data *data; | |
1806 | struct nfs_mount_data *options = (struct nfs_mount_data *)raw_data; | |
1807 | struct nfs4_mount_data *options4 = (struct nfs4_mount_data *)raw_data; | |
cd100725 | 1808 | u32 nfsvers = nfss->nfs_client->rpc_ops->version; |
48b605f8 JL |
1809 | |
1810 | /* | |
1811 | * Userspace mount programs that send binary options generally send | |
1812 | * them populated with default values. We have no way to know which | |
1813 | * ones were explicitly specified. Fall back to legacy behavior and | |
1814 | * just return success. | |
1815 | */ | |
31c94469 MZ |
1816 | if ((nfsvers == 4 && (!options4 || options4->version == 1)) || |
1817 | (nfsvers <= 3 && (!options || (options->version >= 1 && | |
1818 | options->version <= 6)))) | |
48b605f8 JL |
1819 | return 0; |
1820 | ||
1821 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
1822 | if (data == NULL) | |
1823 | return -ENOMEM; | |
1824 | ||
337eb00a | 1825 | lock_kernel(); |
48b605f8 JL |
1826 | /* fill out struct with values from existing mount */ |
1827 | data->flags = nfss->flags; | |
1828 | data->rsize = nfss->rsize; | |
1829 | data->wsize = nfss->wsize; | |
1830 | data->retrans = nfss->client->cl_timeout->to_retries; | |
1831 | data->auth_flavors[0] = nfss->client->cl_auth->au_flavor; | |
1832 | data->acregmin = nfss->acregmin / HZ; | |
1833 | data->acregmax = nfss->acregmax / HZ; | |
1834 | data->acdirmin = nfss->acdirmin / HZ; | |
1835 | data->acdirmax = nfss->acdirmax / HZ; | |
1836 | data->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; | |
1837 | data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; | |
1838 | memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr, | |
1839 | data->nfs_server.addrlen); | |
1840 | ||
1841 | /* overwrite those values with any that were specified */ | |
1842 | error = nfs_parse_mount_options((char *)options, data); | |
1843 | if (error < 0) | |
1844 | goto out; | |
1845 | ||
1846 | /* compare new mount options with old ones */ | |
1847 | error = nfs_compare_remount_data(nfss, data); | |
1848 | out: | |
1849 | kfree(data); | |
337eb00a | 1850 | unlock_kernel(); |
48b605f8 JL |
1851 | return error; |
1852 | } | |
1853 | ||
f7b422b1 | 1854 | /* |
54ceac45 | 1855 | * Initialise the common bits of the superblock |
f7b422b1 | 1856 | */ |
54ceac45 | 1857 | static inline void nfs_initialise_sb(struct super_block *sb) |
f7b422b1 | 1858 | { |
54ceac45 | 1859 | struct nfs_server *server = NFS_SB(sb); |
5006a76c | 1860 | |
54ceac45 | 1861 | sb->s_magic = NFS_SUPER_MAGIC; |
f7b422b1 | 1862 | |
54ceac45 DH |
1863 | /* We probably want something more informative here */ |
1864 | snprintf(sb->s_id, sizeof(sb->s_id), | |
1865 | "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev)); | |
5006a76c | 1866 | |
54ceac45 DH |
1867 | if (sb->s_blocksize == 0) |
1868 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
1869 | &sb->s_blocksize_bits); | |
f7b422b1 | 1870 | |
54ceac45 DH |
1871 | if (server->flags & NFS_MOUNT_NOAC) |
1872 | sb->s_flags |= MS_SYNCHRONOUS; | |
f7b422b1 | 1873 | |
54ceac45 | 1874 | nfs_super_set_maxbytes(sb, server->maxfilesize); |
f7b422b1 DH |
1875 | } |
1876 | ||
1877 | /* | |
54ceac45 | 1878 | * Finish setting up an NFS2/3 superblock |
f7b422b1 | 1879 | */ |
2283f8d6 TT |
1880 | static void nfs_fill_super(struct super_block *sb, |
1881 | struct nfs_parsed_mount_data *data) | |
f7b422b1 DH |
1882 | { |
1883 | struct nfs_server *server = NFS_SB(sb); | |
5006a76c | 1884 | |
54ceac45 DH |
1885 | sb->s_blocksize_bits = 0; |
1886 | sb->s_blocksize = 0; | |
1887 | if (data->bsize) | |
1888 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); | |
f7b422b1 | 1889 | |
54ceac45 DH |
1890 | if (server->flags & NFS_MOUNT_VER3) { |
1891 | /* The VFS shouldn't apply the umask to mode bits. We will do | |
1892 | * so ourselves when necessary. | |
1893 | */ | |
1894 | sb->s_flags |= MS_POSIXACL; | |
1895 | sb->s_time_gran = 1; | |
816724e6 | 1896 | } |
54ceac45 DH |
1897 | |
1898 | sb->s_op = &nfs_sops; | |
1899 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1900 | } |
1901 | ||
1902 | /* | |
54ceac45 | 1903 | * Finish setting up a cloned NFS2/3 superblock |
f7b422b1 | 1904 | */ |
54ceac45 DH |
1905 | static void nfs_clone_super(struct super_block *sb, |
1906 | const struct super_block *old_sb) | |
f7b422b1 | 1907 | { |
54ceac45 DH |
1908 | struct nfs_server *server = NFS_SB(sb); |
1909 | ||
1910 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; | |
1911 | sb->s_blocksize = old_sb->s_blocksize; | |
1912 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 1913 | |
f7b422b1 | 1914 | if (server->flags & NFS_MOUNT_VER3) { |
54ceac45 DH |
1915 | /* The VFS shouldn't apply the umask to mode bits. We will do |
1916 | * so ourselves when necessary. | |
f7b422b1 DH |
1917 | */ |
1918 | sb->s_flags |= MS_POSIXACL; | |
f7b422b1 | 1919 | sb->s_time_gran = 1; |
f7b422b1 DH |
1920 | } |
1921 | ||
54ceac45 DH |
1922 | sb->s_op = old_sb->s_op; |
1923 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1924 | } |
1925 | ||
275a5d24 TM |
1926 | static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags) |
1927 | { | |
1928 | const struct nfs_server *a = s->s_fs_info; | |
1929 | const struct rpc_clnt *clnt_a = a->client; | |
1930 | const struct rpc_clnt *clnt_b = b->client; | |
1931 | ||
1932 | if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK)) | |
1933 | goto Ebusy; | |
1934 | if (a->nfs_client != b->nfs_client) | |
1935 | goto Ebusy; | |
1936 | if (a->flags != b->flags) | |
1937 | goto Ebusy; | |
1938 | if (a->wsize != b->wsize) | |
1939 | goto Ebusy; | |
1940 | if (a->rsize != b->rsize) | |
1941 | goto Ebusy; | |
1942 | if (a->acregmin != b->acregmin) | |
1943 | goto Ebusy; | |
1944 | if (a->acregmax != b->acregmax) | |
1945 | goto Ebusy; | |
1946 | if (a->acdirmin != b->acdirmin) | |
1947 | goto Ebusy; | |
1948 | if (a->acdirmax != b->acdirmax) | |
1949 | goto Ebusy; | |
1950 | if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) | |
1951 | goto Ebusy; | |
e89a5a43 | 1952 | return 1; |
275a5d24 | 1953 | Ebusy: |
e89a5a43 TM |
1954 | return 0; |
1955 | } | |
1956 | ||
1957 | struct nfs_sb_mountdata { | |
1958 | struct nfs_server *server; | |
1959 | int mntflags; | |
1960 | }; | |
1961 | ||
1962 | static int nfs_set_super(struct super_block *s, void *data) | |
1963 | { | |
1964 | struct nfs_sb_mountdata *sb_mntdata = data; | |
1965 | struct nfs_server *server = sb_mntdata->server; | |
1966 | int ret; | |
1967 | ||
1968 | s->s_flags = sb_mntdata->mntflags; | |
1969 | s->s_fs_info = server; | |
1970 | ret = set_anon_super(s, server); | |
1971 | if (ret == 0) | |
1972 | server->s_dev = s->s_dev; | |
1973 | return ret; | |
1974 | } | |
1975 | ||
fd00a8ff CL |
1976 | static int nfs_compare_super_address(struct nfs_server *server1, |
1977 | struct nfs_server *server2) | |
1978 | { | |
1979 | struct sockaddr *sap1, *sap2; | |
1980 | ||
1981 | sap1 = (struct sockaddr *)&server1->nfs_client->cl_addr; | |
1982 | sap2 = (struct sockaddr *)&server2->nfs_client->cl_addr; | |
1983 | ||
1984 | if (sap1->sa_family != sap2->sa_family) | |
1985 | return 0; | |
1986 | ||
1987 | switch (sap1->sa_family) { | |
1988 | case AF_INET: { | |
1989 | struct sockaddr_in *sin1 = (struct sockaddr_in *)sap1; | |
1990 | struct sockaddr_in *sin2 = (struct sockaddr_in *)sap2; | |
1991 | if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) | |
1992 | return 0; | |
1993 | if (sin1->sin_port != sin2->sin_port) | |
1994 | return 0; | |
1995 | break; | |
1996 | } | |
1997 | case AF_INET6: { | |
1998 | struct sockaddr_in6 *sin1 = (struct sockaddr_in6 *)sap1; | |
1999 | struct sockaddr_in6 *sin2 = (struct sockaddr_in6 *)sap2; | |
2000 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) | |
2001 | return 0; | |
2002 | if (sin1->sin6_port != sin2->sin6_port) | |
2003 | return 0; | |
2004 | break; | |
2005 | } | |
2006 | default: | |
2007 | return 0; | |
2008 | } | |
2009 | ||
2010 | return 1; | |
2011 | } | |
2012 | ||
e89a5a43 TM |
2013 | static int nfs_compare_super(struct super_block *sb, void *data) |
2014 | { | |
2015 | struct nfs_sb_mountdata *sb_mntdata = data; | |
2016 | struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb); | |
2017 | int mntflags = sb_mntdata->mntflags; | |
2018 | ||
fd00a8ff | 2019 | if (!nfs_compare_super_address(old, server)) |
e89a5a43 TM |
2020 | return 0; |
2021 | /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */ | |
2022 | if (old->flags & NFS_MOUNT_UNSHARED) | |
2023 | return 0; | |
2024 | if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0) | |
2025 | return 0; | |
2026 | return nfs_compare_mount_options(sb, server, mntflags); | |
275a5d24 TM |
2027 | } |
2028 | ||
fa799759 MS |
2029 | static int nfs_bdi_register(struct nfs_server *server) |
2030 | { | |
2031 | return bdi_register_dev(&server->backing_dev_info, server->s_dev); | |
2032 | } | |
2033 | ||
816724e6 TM |
2034 | static int nfs_get_sb(struct file_system_type *fs_type, |
2035 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
f7b422b1 | 2036 | { |
f7b422b1 DH |
2037 | struct nfs_server *server = NULL; |
2038 | struct super_block *s; | |
33852a1f TM |
2039 | struct nfs_parsed_mount_data *data; |
2040 | struct nfs_fh *mntfh; | |
54ceac45 | 2041 | struct dentry *mntroot; |
75180df2 | 2042 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2043 | struct nfs_sb_mountdata sb_mntdata = { |
2044 | .mntflags = flags, | |
2045 | }; | |
33852a1f TM |
2046 | int error = -ENOMEM; |
2047 | ||
2048 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2049 | mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL); | |
2050 | if (data == NULL || mntfh == NULL) | |
2051 | goto out_free_fh; | |
f7b422b1 | 2052 | |
33852a1f | 2053 | security_init_mnt_opts(&data->lsm_opts); |
f9c3a380 | 2054 | |
54ceac45 | 2055 | /* Validate the mount data */ |
33852a1f | 2056 | error = nfs_validate_mount_data(raw_data, data, mntfh, dev_name); |
54ceac45 | 2057 | if (error < 0) |
0655960f | 2058 | goto out; |
f7b422b1 | 2059 | |
54ceac45 | 2060 | /* Get a volume representation */ |
33852a1f | 2061 | server = nfs_create_server(data, mntfh); |
54ceac45 DH |
2062 | if (IS_ERR(server)) { |
2063 | error = PTR_ERR(server); | |
0655960f | 2064 | goto out; |
f7b422b1 | 2065 | } |
e89a5a43 | 2066 | sb_mntdata.server = server; |
f7b422b1 | 2067 | |
75180df2 TM |
2068 | if (server->flags & NFS_MOUNT_UNSHARED) |
2069 | compare_super = NULL; | |
2070 | ||
54ceac45 | 2071 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 2072 | s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
2073 | if (IS_ERR(s)) { |
2074 | error = PTR_ERR(s); | |
54ceac45 | 2075 | goto out_err_nosb; |
816724e6 TM |
2076 | } |
2077 | ||
54ceac45 DH |
2078 | if (s->s_fs_info != server) { |
2079 | nfs_free_server(server); | |
2080 | server = NULL; | |
fa799759 MS |
2081 | } else { |
2082 | error = nfs_bdi_register(server); | |
2083 | if (error) | |
2084 | goto error_splat_super; | |
54ceac45 | 2085 | } |
f7b422b1 | 2086 | |
54ceac45 DH |
2087 | if (!s->s_root) { |
2088 | /* initial superblock/root creation */ | |
33852a1f | 2089 | nfs_fill_super(s, data); |
08734048 | 2090 | nfs_fscache_get_super_cookie(s, data); |
54ceac45 | 2091 | } |
f7b422b1 | 2092 | |
33852a1f | 2093 | mntroot = nfs_get_root(s, mntfh); |
54ceac45 DH |
2094 | if (IS_ERR(mntroot)) { |
2095 | error = PTR_ERR(mntroot); | |
2096 | goto error_splat_super; | |
f7b422b1 | 2097 | } |
816724e6 | 2098 | |
33852a1f | 2099 | error = security_sb_set_mnt_opts(s, &data->lsm_opts); |
f9c3a380 EP |
2100 | if (error) |
2101 | goto error_splat_root; | |
2102 | ||
54ceac45 DH |
2103 | s->s_flags |= MS_ACTIVE; |
2104 | mnt->mnt_sb = s; | |
2105 | mnt->mnt_root = mntroot; | |
0655960f CL |
2106 | error = 0; |
2107 | ||
2108 | out: | |
33852a1f TM |
2109 | kfree(data->nfs_server.hostname); |
2110 | kfree(data->mount_server.hostname); | |
08734048 | 2111 | kfree(data->fscache_uniq); |
33852a1f TM |
2112 | security_free_mnt_opts(&data->lsm_opts); |
2113 | out_free_fh: | |
2114 | kfree(mntfh); | |
2115 | kfree(data); | |
0655960f | 2116 | return error; |
816724e6 | 2117 | |
54ceac45 DH |
2118 | out_err_nosb: |
2119 | nfs_free_server(server); | |
0655960f | 2120 | goto out; |
54ceac45 | 2121 | |
f9c3a380 EP |
2122 | error_splat_root: |
2123 | dput(mntroot); | |
54ceac45 | 2124 | error_splat_super: |
6f5bbff9 | 2125 | deactivate_locked_super(s); |
0655960f | 2126 | goto out; |
f7b422b1 DH |
2127 | } |
2128 | ||
54ceac45 DH |
2129 | /* |
2130 | * Destroy an NFS2/3 superblock | |
2131 | */ | |
f7b422b1 DH |
2132 | static void nfs_kill_super(struct super_block *s) |
2133 | { | |
2134 | struct nfs_server *server = NFS_SB(s); | |
2135 | ||
fa799759 | 2136 | bdi_unregister(&server->backing_dev_info); |
f7b422b1 | 2137 | kill_anon_super(s); |
08734048 | 2138 | nfs_fscache_release_super_cookie(s); |
54ceac45 | 2139 | nfs_free_server(server); |
f7b422b1 DH |
2140 | } |
2141 | ||
54ceac45 DH |
2142 | /* |
2143 | * Clone an NFS2/3 server record on xdev traversal (FSID-change) | |
2144 | */ | |
2145 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags, | |
2146 | const char *dev_name, void *raw_data, | |
2147 | struct vfsmount *mnt) | |
f7b422b1 DH |
2148 | { |
2149 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
2150 | struct super_block *s; |
2151 | struct nfs_server *server; | |
2152 | struct dentry *mntroot; | |
75180df2 | 2153 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2154 | struct nfs_sb_mountdata sb_mntdata = { |
2155 | .mntflags = flags, | |
2156 | }; | |
54ceac45 | 2157 | int error; |
f7b422b1 | 2158 | |
54ceac45 | 2159 | dprintk("--> nfs_xdev_get_sb()\n"); |
f7b422b1 | 2160 | |
54ceac45 DH |
2161 | /* create a new volume representation */ |
2162 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
2163 | if (IS_ERR(server)) { | |
2164 | error = PTR_ERR(server); | |
2165 | goto out_err_noserver; | |
2166 | } | |
e89a5a43 | 2167 | sb_mntdata.server = server; |
8fa5c000 | 2168 | |
75180df2 TM |
2169 | if (server->flags & NFS_MOUNT_UNSHARED) |
2170 | compare_super = NULL; | |
2171 | ||
54ceac45 | 2172 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 2173 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2174 | if (IS_ERR(s)) { |
2175 | error = PTR_ERR(s); | |
2176 | goto out_err_nosb; | |
2177 | } | |
5006a76c | 2178 | |
54ceac45 DH |
2179 | if (s->s_fs_info != server) { |
2180 | nfs_free_server(server); | |
2181 | server = NULL; | |
fa799759 MS |
2182 | } else { |
2183 | error = nfs_bdi_register(server); | |
2184 | if (error) | |
2185 | goto error_splat_super; | |
f7b422b1 | 2186 | } |
24c8dbbb | 2187 | |
54ceac45 DH |
2188 | if (!s->s_root) { |
2189 | /* initial superblock/root creation */ | |
54ceac45 DH |
2190 | nfs_clone_super(s, data->sb); |
2191 | } | |
f7b422b1 | 2192 | |
54ceac45 DH |
2193 | mntroot = nfs_get_root(s, data->fh); |
2194 | if (IS_ERR(mntroot)) { | |
2195 | error = PTR_ERR(mntroot); | |
2196 | goto error_splat_super; | |
f7b422b1 | 2197 | } |
e9cc6c23 | 2198 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
4c1fe2f7 NB |
2199 | dput(mntroot); |
2200 | error = -ESTALE; | |
2201 | goto error_splat_super; | |
2202 | } | |
f7b422b1 | 2203 | |
54ceac45 DH |
2204 | s->s_flags |= MS_ACTIVE; |
2205 | mnt->mnt_sb = s; | |
2206 | mnt->mnt_root = mntroot; | |
f7b422b1 | 2207 | |
f9c3a380 EP |
2208 | /* clone any lsm security options from the parent to the new sb */ |
2209 | security_sb_clone_mnt_opts(data->sb, s); | |
2210 | ||
54ceac45 DH |
2211 | dprintk("<-- nfs_xdev_get_sb() = 0\n"); |
2212 | return 0; | |
24c8dbbb | 2213 | |
54ceac45 DH |
2214 | out_err_nosb: |
2215 | nfs_free_server(server); | |
2216 | out_err_noserver: | |
2217 | dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error); | |
2218 | return error; | |
f7b422b1 | 2219 | |
54ceac45 | 2220 | error_splat_super: |
6f5bbff9 | 2221 | deactivate_locked_super(s); |
54ceac45 DH |
2222 | dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error); |
2223 | return error; | |
f7b422b1 DH |
2224 | } |
2225 | ||
54ceac45 DH |
2226 | #ifdef CONFIG_NFS_V4 |
2227 | ||
f7b422b1 | 2228 | /* |
54ceac45 | 2229 | * Finish setting up a cloned NFS4 superblock |
f7b422b1 | 2230 | */ |
54ceac45 DH |
2231 | static void nfs4_clone_super(struct super_block *sb, |
2232 | const struct super_block *old_sb) | |
f7b422b1 | 2233 | { |
54ceac45 DH |
2234 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; |
2235 | sb->s_blocksize = old_sb->s_blocksize; | |
2236 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 2237 | sb->s_time_gran = 1; |
54ceac45 DH |
2238 | sb->s_op = old_sb->s_op; |
2239 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
2240 | } |
2241 | ||
54ceac45 DH |
2242 | /* |
2243 | * Set up an NFS4 superblock | |
2244 | */ | |
2245 | static void nfs4_fill_super(struct super_block *sb) | |
f7b422b1 | 2246 | { |
54ceac45 DH |
2247 | sb->s_time_gran = 1; |
2248 | sb->s_op = &nfs4_sops; | |
2249 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
2250 | } |
2251 | ||
01c3f052 TM |
2252 | static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) |
2253 | { | |
2254 | args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3); | |
2255 | } | |
2256 | ||
f0768ebd CL |
2257 | /* |
2258 | * Validate NFSv4 mount options | |
2259 | */ | |
91ea40b9 TT |
2260 | static int nfs4_validate_mount_data(void *options, |
2261 | struct nfs_parsed_mount_data *args, | |
2262 | const char *dev_name) | |
f0768ebd | 2263 | { |
4c568017 | 2264 | struct sockaddr_in *ap; |
91ea40b9 | 2265 | struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; |
f0768ebd CL |
2266 | char *c; |
2267 | ||
2268 | if (data == NULL) | |
2269 | goto out_no_data; | |
2270 | ||
91ea40b9 TT |
2271 | args->rsize = NFS_MAX_FILE_IO_SIZE; |
2272 | args->wsize = NFS_MAX_FILE_IO_SIZE; | |
0e0cab74 CL |
2273 | args->acregmin = NFS_DEF_ACREGMIN; |
2274 | args->acregmax = NFS_DEF_ACREGMAX; | |
2275 | args->acdirmin = NFS_DEF_ACDIRMIN; | |
2276 | args->acdirmax = NFS_DEF_ACDIRMAX; | |
f22d6d79 | 2277 | args->nfs_server.port = NFS_PORT; /* 2049 unless user set port= */ |
6738b251 | 2278 | args->auth_flavors[0] = RPC_AUTH_UNIX; |
059f90b3 | 2279 | args->auth_flavor_len = 1; |
3fd5be9e | 2280 | args->minorversion = 0; |
91ea40b9 | 2281 | |
f0768ebd CL |
2282 | switch (data->version) { |
2283 | case 1: | |
4c568017 CL |
2284 | ap = (struct sockaddr_in *)&args->nfs_server.address; |
2285 | if (data->host_addrlen > sizeof(args->nfs_server.address)) | |
2286 | goto out_no_address; | |
2287 | if (data->host_addrlen == 0) | |
f0768ebd | 2288 | goto out_no_address; |
4c568017 CL |
2289 | args->nfs_server.addrlen = data->host_addrlen; |
2290 | if (copy_from_user(ap, data->host_addr, data->host_addrlen)) | |
f0768ebd | 2291 | return -EFAULT; |
91ea40b9 TT |
2292 | if (!nfs_verify_server_address((struct sockaddr *) |
2293 | &args->nfs_server.address)) | |
f0768ebd CL |
2294 | goto out_no_address; |
2295 | ||
6738b251 CL |
2296 | if (data->auth_flavourlen) { |
2297 | if (data->auth_flavourlen > 1) | |
2298 | goto out_inval_auth; | |
20c71f5e | 2299 | if (copy_from_user(&args->auth_flavors[0], |
91ea40b9 | 2300 | data->auth_flavours, |
20c71f5e | 2301 | sizeof(args->auth_flavors[0]))) |
f0768ebd | 2302 | return -EFAULT; |
f0768ebd CL |
2303 | } |
2304 | ||
2305 | c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); | |
2306 | if (IS_ERR(c)) | |
2307 | return PTR_ERR(c); | |
91ea40b9 | 2308 | args->nfs_server.hostname = c; |
f0768ebd CL |
2309 | |
2310 | c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); | |
2311 | if (IS_ERR(c)) | |
2312 | return PTR_ERR(c); | |
91ea40b9 TT |
2313 | args->nfs_server.export_path = c; |
2314 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); | |
f0768ebd CL |
2315 | |
2316 | c = strndup_user(data->client_addr.data, 16); | |
2317 | if (IS_ERR(c)) | |
2318 | return PTR_ERR(c); | |
91ea40b9 TT |
2319 | args->client_address = c; |
2320 | ||
2321 | /* | |
2322 | * Translate to nfs_parsed_mount_data, which nfs4_fill_super | |
2323 | * can deal with. | |
2324 | */ | |
2325 | ||
2326 | args->flags = data->flags & NFS4_MOUNT_FLAGMASK; | |
2327 | args->rsize = data->rsize; | |
2328 | args->wsize = data->wsize; | |
2329 | args->timeo = data->timeo; | |
2330 | args->retrans = data->retrans; | |
2331 | args->acregmin = data->acregmin; | |
2332 | args->acregmax = data->acregmax; | |
2333 | args->acdirmin = data->acdirmin; | |
2334 | args->acdirmax = data->acdirmax; | |
2335 | args->nfs_server.protocol = data->proto; | |
259875ef | 2336 | nfs_validate_transport_protocol(args); |
f0768ebd CL |
2337 | |
2338 | break; | |
80071225 | 2339 | default: { |
dc045898 | 2340 | int status; |
91ea40b9 TT |
2341 | |
2342 | if (nfs_parse_mount_options((char *)options, args) == 0) | |
80071225 CL |
2343 | return -EINVAL; |
2344 | ||
2345 | if (!nfs_verify_server_address((struct sockaddr *) | |
91ea40b9 | 2346 | &args->nfs_server.address)) |
80071225 | 2347 | return -EINVAL; |
80071225 | 2348 | |
ec6ee612 | 2349 | rpc_set_port((struct sockaddr *)&args->nfs_server.address, |
ed596a8a CL |
2350 | args->nfs_server.port); |
2351 | ||
259875ef TM |
2352 | nfs_validate_transport_protocol(args); |
2353 | ||
01c3f052 TM |
2354 | nfs4_validate_mount_flags(args); |
2355 | ||
6738b251 | 2356 | if (args->auth_flavor_len > 1) |
80071225 | 2357 | goto out_inval_auth; |
80071225 | 2358 | |
91ea40b9 | 2359 | if (args->client_address == NULL) |
0a87cf12 JL |
2360 | goto out_no_client_address; |
2361 | ||
dc045898 CL |
2362 | status = nfs_parse_devname(dev_name, |
2363 | &args->nfs_server.hostname, | |
2364 | NFS4_MAXNAMLEN, | |
2365 | &args->nfs_server.export_path, | |
2366 | NFS4_MAXPATHLEN); | |
2367 | if (status < 0) | |
2368 | return status; | |
2369 | ||
80071225 CL |
2370 | break; |
2371 | } | |
f0768ebd CL |
2372 | } |
2373 | ||
2374 | return 0; | |
2375 | ||
2376 | out_no_data: | |
2377 | dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); | |
2378 | return -EINVAL; | |
2379 | ||
2380 | out_inval_auth: | |
2381 | dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", | |
2382 | data->auth_flavourlen); | |
2383 | return -EINVAL; | |
2384 | ||
2385 | out_no_address: | |
2386 | dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); | |
2387 | return -EINVAL; | |
0a87cf12 JL |
2388 | |
2389 | out_no_client_address: | |
2390 | dfprintk(MOUNT, "NFS4: mount program didn't pass callback address\n"); | |
2391 | return -EINVAL; | |
f0768ebd CL |
2392 | } |
2393 | ||
54ceac45 | 2394 | /* |
c02d7adf | 2395 | * Get the superblock for the NFS4 root partition |
54ceac45 | 2396 | */ |
c02d7adf | 2397 | static int nfs4_remote_get_sb(struct file_system_type *fs_type, |
816724e6 | 2398 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) |
f7b422b1 | 2399 | { |
c02d7adf | 2400 | struct nfs_parsed_mount_data *data = raw_data; |
54ceac45 DH |
2401 | struct super_block *s; |
2402 | struct nfs_server *server; | |
33852a1f | 2403 | struct nfs_fh *mntfh; |
54ceac45 | 2404 | struct dentry *mntroot; |
75180df2 | 2405 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2406 | struct nfs_sb_mountdata sb_mntdata = { |
2407 | .mntflags = flags, | |
2408 | }; | |
33852a1f TM |
2409 | int error = -ENOMEM; |
2410 | ||
33852a1f TM |
2411 | mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL); |
2412 | if (data == NULL || mntfh == NULL) | |
2413 | goto out_free_fh; | |
f7b422b1 | 2414 | |
33852a1f | 2415 | security_init_mnt_opts(&data->lsm_opts); |
f9c3a380 | 2416 | |
54ceac45 | 2417 | /* Get a volume representation */ |
33852a1f | 2418 | server = nfs4_create_server(data, mntfh); |
54ceac45 DH |
2419 | if (IS_ERR(server)) { |
2420 | error = PTR_ERR(server); | |
29eb981a | 2421 | goto out; |
f7b422b1 | 2422 | } |
e89a5a43 | 2423 | sb_mntdata.server = server; |
f7b422b1 | 2424 | |
75180df2 TM |
2425 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2426 | compare_super = NULL; | |
2427 | ||
54ceac45 | 2428 | /* Get a superblock - note that we may end up sharing one that already exists */ |
c02d7adf | 2429 | s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
2430 | if (IS_ERR(s)) { |
2431 | error = PTR_ERR(s); | |
f7b422b1 | 2432 | goto out_free; |
816724e6 TM |
2433 | } |
2434 | ||
5dd3177a TM |
2435 | if (s->s_fs_info != server) { |
2436 | nfs_free_server(server); | |
2437 | server = NULL; | |
fa799759 MS |
2438 | } else { |
2439 | error = nfs_bdi_register(server); | |
2440 | if (error) | |
2441 | goto error_splat_super; | |
5dd3177a TM |
2442 | } |
2443 | ||
54ceac45 DH |
2444 | if (!s->s_root) { |
2445 | /* initial superblock/root creation */ | |
54ceac45 | 2446 | nfs4_fill_super(s); |
08734048 | 2447 | nfs_fscache_get_super_cookie(s, data); |
54ceac45 | 2448 | } |
f7b422b1 | 2449 | |
33852a1f | 2450 | mntroot = nfs4_get_root(s, mntfh); |
54ceac45 DH |
2451 | if (IS_ERR(mntroot)) { |
2452 | error = PTR_ERR(mntroot); | |
2453 | goto error_splat_super; | |
f7b422b1 | 2454 | } |
54ceac45 | 2455 | |
33852a1f | 2456 | error = security_sb_set_mnt_opts(s, &data->lsm_opts); |
46c8ac74 EP |
2457 | if (error) |
2458 | goto error_splat_root; | |
2459 | ||
f7b422b1 | 2460 | s->s_flags |= MS_ACTIVE; |
54ceac45 DH |
2461 | mnt->mnt_sb = s; |
2462 | mnt->mnt_root = mntroot; | |
29eb981a CL |
2463 | error = 0; |
2464 | ||
2465 | out: | |
33852a1f TM |
2466 | security_free_mnt_opts(&data->lsm_opts); |
2467 | out_free_fh: | |
2468 | kfree(mntfh); | |
29eb981a | 2469 | return error; |
54ceac45 | 2470 | |
f7b422b1 | 2471 | out_free: |
54ceac45 | 2472 | nfs_free_server(server); |
29eb981a | 2473 | goto out; |
54ceac45 | 2474 | |
46c8ac74 EP |
2475 | error_splat_root: |
2476 | dput(mntroot); | |
54ceac45 | 2477 | error_splat_super: |
6f5bbff9 | 2478 | deactivate_locked_super(s); |
29eb981a | 2479 | goto out; |
f7b422b1 DH |
2480 | } |
2481 | ||
c02d7adf TM |
2482 | static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type, |
2483 | int flags, void *data, const char *hostname) | |
2484 | { | |
2485 | struct vfsmount *root_mnt; | |
2486 | char *root_devname; | |
2487 | size_t len; | |
2488 | ||
2489 | len = strlen(hostname) + 3; | |
2490 | root_devname = kmalloc(len, GFP_KERNEL); | |
2491 | if (root_devname == NULL) | |
2492 | return ERR_PTR(-ENOMEM); | |
2493 | snprintf(root_devname, len, "%s:/", hostname); | |
2494 | root_mnt = vfs_kern_mount(fs_type, flags, root_devname, data); | |
2495 | kfree(root_devname); | |
2496 | return root_mnt; | |
2497 | } | |
2498 | ||
b88f8a54 TM |
2499 | static void nfs_fix_devname(const struct path *path, struct vfsmount *mnt) |
2500 | { | |
2501 | char *page = (char *) __get_free_page(GFP_KERNEL); | |
2502 | char *devname, *tmp; | |
2503 | ||
2504 | if (page == NULL) | |
2505 | return; | |
2506 | devname = nfs_path(path->mnt->mnt_devname, | |
2507 | path->mnt->mnt_root, path->dentry, | |
2508 | page, PAGE_SIZE); | |
2509 | if (devname == NULL) | |
2510 | goto out_freepage; | |
2511 | tmp = kstrdup(devname, GFP_KERNEL); | |
2512 | if (tmp == NULL) | |
2513 | goto out_freepage; | |
2514 | kfree(mnt->mnt_devname); | |
2515 | mnt->mnt_devname = tmp; | |
2516 | out_freepage: | |
2517 | free_page((unsigned long)page); | |
2518 | } | |
2519 | ||
c02d7adf TM |
2520 | static int nfs_follow_remote_path(struct vfsmount *root_mnt, |
2521 | const char *export_path, struct vfsmount *mnt_target) | |
2522 | { | |
2523 | struct mnt_namespace *ns_private; | |
2524 | struct nameidata nd; | |
2525 | struct super_block *s; | |
2526 | int ret; | |
2527 | ||
2528 | ns_private = create_mnt_ns(root_mnt); | |
2529 | ret = PTR_ERR(ns_private); | |
2530 | if (IS_ERR(ns_private)) | |
2531 | goto out_mntput; | |
2532 | ||
2533 | ret = vfs_path_lookup(root_mnt->mnt_root, root_mnt, | |
2534 | export_path, LOOKUP_FOLLOW, &nd); | |
2535 | ||
2536 | put_mnt_ns(ns_private); | |
2537 | ||
2538 | if (ret != 0) | |
2539 | goto out_err; | |
2540 | ||
2541 | s = nd.path.mnt->mnt_sb; | |
2542 | atomic_inc(&s->s_active); | |
2543 | mnt_target->mnt_sb = s; | |
2544 | mnt_target->mnt_root = dget(nd.path.dentry); | |
2545 | ||
b88f8a54 TM |
2546 | /* Correct the device pathname */ |
2547 | nfs_fix_devname(&nd.path, mnt_target); | |
2548 | ||
c02d7adf TM |
2549 | path_put(&nd.path); |
2550 | down_write(&s->s_umount); | |
2551 | return 0; | |
2552 | out_mntput: | |
2553 | mntput(root_mnt); | |
2554 | out_err: | |
2555 | return ret; | |
2556 | } | |
2557 | ||
2558 | /* | |
2559 | * Get the superblock for an NFS4 mountpoint | |
2560 | */ | |
2561 | static int nfs4_get_sb(struct file_system_type *fs_type, | |
2562 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
2563 | { | |
2564 | struct nfs_parsed_mount_data *data; | |
2565 | char *export_path; | |
2566 | struct vfsmount *root_mnt; | |
2567 | int error = -ENOMEM; | |
2568 | ||
2569 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2570 | if (data == NULL) | |
2571 | goto out_free_data; | |
2572 | ||
2573 | /* Validate the mount data */ | |
2574 | error = nfs4_validate_mount_data(raw_data, data, dev_name); | |
2575 | if (error < 0) | |
2576 | goto out; | |
2577 | ||
2578 | export_path = data->nfs_server.export_path; | |
2579 | data->nfs_server.export_path = "/"; | |
2580 | root_mnt = nfs_do_root_mount(&nfs4_remote_fs_type, flags, data, | |
2581 | data->nfs_server.hostname); | |
2582 | data->nfs_server.export_path = export_path; | |
2583 | ||
2584 | error = PTR_ERR(root_mnt); | |
2585 | if (IS_ERR(root_mnt)) | |
2586 | goto out; | |
2587 | ||
2588 | error = nfs_follow_remote_path(root_mnt, export_path, mnt); | |
2589 | ||
2590 | out: | |
2591 | kfree(data->client_address); | |
2592 | kfree(data->nfs_server.export_path); | |
2593 | kfree(data->nfs_server.hostname); | |
2594 | kfree(data->fscache_uniq); | |
2595 | out_free_data: | |
2596 | kfree(data); | |
2597 | dprintk("<-- nfs4_get_sb() = %d%s\n", error, | |
2598 | error != 0 ? " [error]" : ""); | |
2599 | return error; | |
2600 | } | |
2601 | ||
f7b422b1 DH |
2602 | static void nfs4_kill_super(struct super_block *sb) |
2603 | { | |
2604 | struct nfs_server *server = NFS_SB(sb); | |
2605 | ||
0f3e66c6 | 2606 | dprintk("--> %s\n", __func__); |
515d8611 | 2607 | nfs_super_return_all_delegations(sb); |
f7b422b1 | 2608 | kill_anon_super(sb); |
f7b422b1 | 2609 | nfs4_renewd_prepare_shutdown(server); |
08734048 | 2610 | nfs_fscache_release_super_cookie(sb); |
54ceac45 | 2611 | nfs_free_server(server); |
0f3e66c6 | 2612 | dprintk("<-- %s\n", __func__); |
f7b422b1 DH |
2613 | } |
2614 | ||
2615 | /* | |
54ceac45 | 2616 | * Clone an NFS4 server record on xdev traversal (FSID-change) |
f7b422b1 | 2617 | */ |
54ceac45 DH |
2618 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags, |
2619 | const char *dev_name, void *raw_data, | |
2620 | struct vfsmount *mnt) | |
f7b422b1 | 2621 | { |
54ceac45 DH |
2622 | struct nfs_clone_mount *data = raw_data; |
2623 | struct super_block *s; | |
2624 | struct nfs_server *server; | |
2625 | struct dentry *mntroot; | |
75180df2 | 2626 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2627 | struct nfs_sb_mountdata sb_mntdata = { |
2628 | .mntflags = flags, | |
2629 | }; | |
54ceac45 | 2630 | int error; |
f7b422b1 | 2631 | |
54ceac45 | 2632 | dprintk("--> nfs4_xdev_get_sb()\n"); |
f7b422b1 | 2633 | |
54ceac45 DH |
2634 | /* create a new volume representation */ |
2635 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
2636 | if (IS_ERR(server)) { | |
2637 | error = PTR_ERR(server); | |
2638 | goto out_err_noserver; | |
f7b422b1 | 2639 | } |
e89a5a43 | 2640 | sb_mntdata.server = server; |
f7b422b1 | 2641 | |
75180df2 TM |
2642 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2643 | compare_super = NULL; | |
2644 | ||
54ceac45 | 2645 | /* Get a superblock - note that we may end up sharing one that already exists */ |
ec9a05c9 | 2646 | s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2647 | if (IS_ERR(s)) { |
2648 | error = PTR_ERR(s); | |
2649 | goto out_err_nosb; | |
f7b422b1 | 2650 | } |
f7b422b1 | 2651 | |
54ceac45 DH |
2652 | if (s->s_fs_info != server) { |
2653 | nfs_free_server(server); | |
2654 | server = NULL; | |
fa799759 MS |
2655 | } else { |
2656 | error = nfs_bdi_register(server); | |
2657 | if (error) | |
2658 | goto error_splat_super; | |
54ceac45 | 2659 | } |
f7b422b1 | 2660 | |
54ceac45 DH |
2661 | if (!s->s_root) { |
2662 | /* initial superblock/root creation */ | |
54ceac45 DH |
2663 | nfs4_clone_super(s, data->sb); |
2664 | } | |
f7b422b1 | 2665 | |
54ceac45 DH |
2666 | mntroot = nfs4_get_root(s, data->fh); |
2667 | if (IS_ERR(mntroot)) { | |
2668 | error = PTR_ERR(mntroot); | |
2669 | goto error_splat_super; | |
2670 | } | |
e9cc6c23 TM |
2671 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
2672 | dput(mntroot); | |
2673 | error = -ESTALE; | |
2674 | goto error_splat_super; | |
2675 | } | |
f7b422b1 | 2676 | |
54ceac45 DH |
2677 | s->s_flags |= MS_ACTIVE; |
2678 | mnt->mnt_sb = s; | |
2679 | mnt->mnt_root = mntroot; | |
2680 | ||
46c8ac74 EP |
2681 | security_sb_clone_mnt_opts(data->sb, s); |
2682 | ||
54ceac45 DH |
2683 | dprintk("<-- nfs4_xdev_get_sb() = 0\n"); |
2684 | return 0; | |
2685 | ||
2686 | out_err_nosb: | |
2687 | nfs_free_server(server); | |
2688 | out_err_noserver: | |
2689 | dprintk("<-- nfs4_xdev_get_sb() = %d [error]\n", error); | |
2690 | return error; | |
2691 | ||
2692 | error_splat_super: | |
6f5bbff9 | 2693 | deactivate_locked_super(s); |
54ceac45 DH |
2694 | dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error); |
2695 | return error; | |
f7b422b1 DH |
2696 | } |
2697 | ||
c02d7adf TM |
2698 | static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type, |
2699 | int flags, const char *dev_name, void *raw_data, | |
2700 | struct vfsmount *mnt) | |
f7b422b1 DH |
2701 | { |
2702 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
2703 | struct super_block *s; |
2704 | struct nfs_server *server; | |
2705 | struct dentry *mntroot; | |
2706 | struct nfs_fh mntfh; | |
75180df2 | 2707 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2708 | struct nfs_sb_mountdata sb_mntdata = { |
2709 | .mntflags = flags, | |
2710 | }; | |
54ceac45 DH |
2711 | int error; |
2712 | ||
2713 | dprintk("--> nfs4_referral_get_sb()\n"); | |
2714 | ||
2715 | /* create a new volume representation */ | |
2716 | server = nfs4_create_referral_server(data, &mntfh); | |
2717 | if (IS_ERR(server)) { | |
2718 | error = PTR_ERR(server); | |
2719 | goto out_err_noserver; | |
2720 | } | |
e89a5a43 | 2721 | sb_mntdata.server = server; |
54ceac45 | 2722 | |
75180df2 TM |
2723 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2724 | compare_super = NULL; | |
2725 | ||
54ceac45 | 2726 | /* Get a superblock - note that we may end up sharing one that already exists */ |
ec9a05c9 | 2727 | s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2728 | if (IS_ERR(s)) { |
2729 | error = PTR_ERR(s); | |
2730 | goto out_err_nosb; | |
2731 | } | |
2732 | ||
2733 | if (s->s_fs_info != server) { | |
2734 | nfs_free_server(server); | |
2735 | server = NULL; | |
fa799759 MS |
2736 | } else { |
2737 | error = nfs_bdi_register(server); | |
2738 | if (error) | |
2739 | goto error_splat_super; | |
54ceac45 DH |
2740 | } |
2741 | ||
2742 | if (!s->s_root) { | |
2743 | /* initial superblock/root creation */ | |
54ceac45 DH |
2744 | nfs4_fill_super(s); |
2745 | } | |
2746 | ||
f2d0d85e | 2747 | mntroot = nfs4_get_root(s, &mntfh); |
54ceac45 DH |
2748 | if (IS_ERR(mntroot)) { |
2749 | error = PTR_ERR(mntroot); | |
2750 | goto error_splat_super; | |
2751 | } | |
e9cc6c23 TM |
2752 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
2753 | dput(mntroot); | |
2754 | error = -ESTALE; | |
2755 | goto error_splat_super; | |
2756 | } | |
54ceac45 DH |
2757 | |
2758 | s->s_flags |= MS_ACTIVE; | |
2759 | mnt->mnt_sb = s; | |
2760 | mnt->mnt_root = mntroot; | |
2761 | ||
46c8ac74 EP |
2762 | security_sb_clone_mnt_opts(data->sb, s); |
2763 | ||
54ceac45 DH |
2764 | dprintk("<-- nfs4_referral_get_sb() = 0\n"); |
2765 | return 0; | |
2766 | ||
2767 | out_err_nosb: | |
2768 | nfs_free_server(server); | |
2769 | out_err_noserver: | |
2770 | dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error); | |
2771 | return error; | |
2772 | ||
2773 | error_splat_super: | |
6f5bbff9 | 2774 | deactivate_locked_super(s); |
54ceac45 DH |
2775 | dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error); |
2776 | return error; | |
f7b422b1 DH |
2777 | } |
2778 | ||
c02d7adf TM |
2779 | /* |
2780 | * Create an NFS4 server record on referral traversal | |
2781 | */ | |
2782 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, | |
2783 | int flags, const char *dev_name, void *raw_data, | |
2784 | struct vfsmount *mnt) | |
2785 | { | |
2786 | struct nfs_clone_mount *data = raw_data; | |
2787 | char *export_path; | |
2788 | struct vfsmount *root_mnt; | |
2789 | int error; | |
2790 | ||
2791 | dprintk("--> nfs4_referral_get_sb()\n"); | |
2792 | ||
2793 | export_path = data->mnt_path; | |
2794 | data->mnt_path = "/"; | |
2795 | ||
2796 | root_mnt = nfs_do_root_mount(&nfs4_remote_referral_fs_type, | |
2797 | flags, data, data->hostname); | |
2798 | data->mnt_path = export_path; | |
2799 | ||
2800 | error = PTR_ERR(root_mnt); | |
2801 | if (IS_ERR(root_mnt)) | |
2802 | goto out; | |
2803 | ||
2804 | error = nfs_follow_remote_path(root_mnt, export_path, mnt); | |
2805 | out: | |
2806 | dprintk("<-- nfs4_referral_get_sb() = %d%s\n", error, | |
2807 | error != 0 ? " [error]" : ""); | |
2808 | return error; | |
2809 | } | |
2810 | ||
54ceac45 | 2811 | #endif /* CONFIG_NFS_V4 */ |