Commit | Line | Data |
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f7b422b1 DH |
1 | /* |
2 | * linux/fs/nfs/super.c | |
3 | * | |
4 | * Copyright (C) 1992 Rick Sladkey | |
5 | * | |
6 | * nfs superblock handling functions | |
7 | * | |
8 | * Modularised by Alan Cox <Alan.Cox@linux.org>, while hacking some | |
9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. | |
10 | * | |
11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
12 | * J.S.Peatfield@damtp.cam.ac.uk | |
13 | * | |
14 | * Split from inode.c by David Howells <dhowells@redhat.com> | |
15 | * | |
54ceac45 DH |
16 | * - superblocks are indexed on server only - all inodes, dentries, etc. associated with a |
17 | * particular server are held in the same superblock | |
18 | * - NFS superblocks can have several effective roots to the dentry tree | |
19 | * - directory type roots are spliced into the tree when a path from one root reaches the root | |
20 | * of another (see nfs_lookup()) | |
f7b422b1 DH |
21 | */ |
22 | ||
f7b422b1 DH |
23 | #include <linux/module.h> |
24 | #include <linux/init.h> | |
25 | ||
26 | #include <linux/time.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/string.h> | |
30 | #include <linux/stat.h> | |
31 | #include <linux/errno.h> | |
32 | #include <linux/unistd.h> | |
33 | #include <linux/sunrpc/clnt.h> | |
34 | #include <linux/sunrpc/stats.h> | |
35 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 36 | #include <linux/sunrpc/xprtsock.h> |
2cf7ff7a | 37 | #include <linux/sunrpc/xprtrdma.h> |
f7b422b1 DH |
38 | #include <linux/nfs_fs.h> |
39 | #include <linux/nfs_mount.h> | |
40 | #include <linux/nfs4_mount.h> | |
41 | #include <linux/lockd/bind.h> | |
42 | #include <linux/smp_lock.h> | |
43 | #include <linux/seq_file.h> | |
44 | #include <linux/mount.h> | |
45 | #include <linux/nfs_idmap.h> | |
46 | #include <linux/vfs.h> | |
47 | #include <linux/inet.h> | |
fd00a8ff CL |
48 | #include <linux/in6.h> |
49 | #include <net/ipv6.h> | |
f7b422b1 | 50 | #include <linux/nfs_xdr.h> |
b5d5dfbd | 51 | #include <linux/magic.h> |
bf0fd768 | 52 | #include <linux/parser.h> |
f7b422b1 DH |
53 | |
54 | #include <asm/system.h> | |
55 | #include <asm/uaccess.h> | |
56 | ||
57 | #include "nfs4_fs.h" | |
58 | #include "callback.h" | |
59 | #include "delegation.h" | |
60 | #include "iostat.h" | |
61 | #include "internal.h" | |
62 | ||
63 | #define NFSDBG_FACILITY NFSDBG_VFS | |
64 | ||
bf0fd768 CL |
65 | enum { |
66 | /* Mount options that take no arguments */ | |
67 | Opt_soft, Opt_hard, | |
68 | Opt_intr, Opt_nointr, | |
69 | Opt_posix, Opt_noposix, | |
70 | Opt_cto, Opt_nocto, | |
71 | Opt_ac, Opt_noac, | |
72 | Opt_lock, Opt_nolock, | |
73 | Opt_v2, Opt_v3, | |
2cf7ff7a | 74 | Opt_udp, Opt_tcp, Opt_rdma, |
bf0fd768 CL |
75 | Opt_acl, Opt_noacl, |
76 | Opt_rdirplus, Opt_nordirplus, | |
75180df2 | 77 | Opt_sharecache, Opt_nosharecache, |
bf0fd768 CL |
78 | |
79 | /* Mount options that take integer arguments */ | |
80 | Opt_port, | |
81 | Opt_rsize, Opt_wsize, Opt_bsize, | |
82 | Opt_timeo, Opt_retrans, | |
83 | Opt_acregmin, Opt_acregmax, | |
84 | Opt_acdirmin, Opt_acdirmax, | |
85 | Opt_actimeo, | |
86 | Opt_namelen, | |
87 | Opt_mountport, | |
e887cbcf | 88 | Opt_mountvers, |
ad879cef | 89 | Opt_nfsvers, |
bf0fd768 CL |
90 | |
91 | /* Mount options that take string arguments */ | |
33832034 | 92 | Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost, |
0ac83779 | 93 | Opt_addr, Opt_mountaddr, Opt_clientaddr, |
bf0fd768 CL |
94 | |
95 | /* Mount options that are ignored */ | |
96 | Opt_userspace, Opt_deprecated, | |
97 | ||
98 | Opt_err | |
99 | }; | |
100 | ||
101 | static match_table_t nfs_mount_option_tokens = { | |
102 | { Opt_userspace, "bg" }, | |
103 | { Opt_userspace, "fg" }, | |
104 | { Opt_soft, "soft" }, | |
105 | { Opt_hard, "hard" }, | |
106 | { Opt_intr, "intr" }, | |
107 | { Opt_nointr, "nointr" }, | |
108 | { Opt_posix, "posix" }, | |
109 | { Opt_noposix, "noposix" }, | |
110 | { Opt_cto, "cto" }, | |
111 | { Opt_nocto, "nocto" }, | |
112 | { Opt_ac, "ac" }, | |
113 | { Opt_noac, "noac" }, | |
114 | { Opt_lock, "lock" }, | |
115 | { Opt_nolock, "nolock" }, | |
116 | { Opt_v2, "v2" }, | |
117 | { Opt_v3, "v3" }, | |
118 | { Opt_udp, "udp" }, | |
119 | { Opt_tcp, "tcp" }, | |
2cf7ff7a | 120 | { Opt_rdma, "rdma" }, |
bf0fd768 CL |
121 | { Opt_acl, "acl" }, |
122 | { Opt_noacl, "noacl" }, | |
123 | { Opt_rdirplus, "rdirplus" }, | |
124 | { Opt_nordirplus, "nordirplus" }, | |
75180df2 TM |
125 | { Opt_sharecache, "sharecache" }, |
126 | { Opt_nosharecache, "nosharecache" }, | |
bf0fd768 CL |
127 | |
128 | { Opt_port, "port=%u" }, | |
129 | { Opt_rsize, "rsize=%u" }, | |
130 | { Opt_wsize, "wsize=%u" }, | |
131 | { Opt_bsize, "bsize=%u" }, | |
132 | { Opt_timeo, "timeo=%u" }, | |
133 | { Opt_retrans, "retrans=%u" }, | |
134 | { Opt_acregmin, "acregmin=%u" }, | |
135 | { Opt_acregmax, "acregmax=%u" }, | |
136 | { Opt_acdirmin, "acdirmin=%u" }, | |
137 | { Opt_acdirmax, "acdirmax=%u" }, | |
138 | { Opt_actimeo, "actimeo=%u" }, | |
139 | { Opt_userspace, "retry=%u" }, | |
140 | { Opt_namelen, "namlen=%u" }, | |
141 | { Opt_mountport, "mountport=%u" }, | |
bf0fd768 | 142 | { Opt_mountvers, "mountvers=%u" }, |
bf0fd768 CL |
143 | { Opt_nfsvers, "nfsvers=%u" }, |
144 | { Opt_nfsvers, "vers=%u" }, | |
145 | ||
146 | { Opt_sec, "sec=%s" }, | |
147 | { Opt_proto, "proto=%s" }, | |
148 | { Opt_mountproto, "mountproto=%s" }, | |
149 | { Opt_addr, "addr=%s" }, | |
150 | { Opt_clientaddr, "clientaddr=%s" }, | |
33832034 | 151 | { Opt_mounthost, "mounthost=%s" }, |
0ac83779 | 152 | { Opt_mountaddr, "mountaddr=%s" }, |
bf0fd768 CL |
153 | |
154 | { Opt_err, NULL } | |
155 | }; | |
156 | ||
157 | enum { | |
2cf7ff7a | 158 | Opt_xprt_udp, Opt_xprt_tcp, Opt_xprt_rdma, |
bf0fd768 CL |
159 | |
160 | Opt_xprt_err | |
161 | }; | |
162 | ||
163 | static match_table_t nfs_xprt_protocol_tokens = { | |
164 | { Opt_xprt_udp, "udp" }, | |
165 | { Opt_xprt_tcp, "tcp" }, | |
2cf7ff7a | 166 | { Opt_xprt_rdma, "rdma" }, |
bf0fd768 CL |
167 | |
168 | { Opt_xprt_err, NULL } | |
169 | }; | |
170 | ||
171 | enum { | |
172 | Opt_sec_none, Opt_sec_sys, | |
173 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
174 | Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, | |
175 | Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, | |
176 | ||
177 | Opt_sec_err | |
178 | }; | |
179 | ||
180 | static match_table_t nfs_secflavor_tokens = { | |
181 | { Opt_sec_none, "none" }, | |
182 | { Opt_sec_none, "null" }, | |
183 | { Opt_sec_sys, "sys" }, | |
184 | ||
185 | { Opt_sec_krb5, "krb5" }, | |
186 | { Opt_sec_krb5i, "krb5i" }, | |
187 | { Opt_sec_krb5p, "krb5p" }, | |
188 | ||
189 | { Opt_sec_lkey, "lkey" }, | |
190 | { Opt_sec_lkeyi, "lkeyi" }, | |
191 | { Opt_sec_lkeyp, "lkeyp" }, | |
192 | ||
8d042218 OK |
193 | { Opt_sec_spkm, "spkm3" }, |
194 | { Opt_sec_spkmi, "spkm3i" }, | |
195 | { Opt_sec_spkmp, "spkm3p" }, | |
196 | ||
bf0fd768 CL |
197 | { Opt_sec_err, NULL } |
198 | }; | |
199 | ||
200 | ||
f7b422b1 | 201 | static void nfs_umount_begin(struct vfsmount *, int); |
816724e6 | 202 | static int nfs_statfs(struct dentry *, struct kstatfs *); |
f7b422b1 DH |
203 | static int nfs_show_options(struct seq_file *, struct vfsmount *); |
204 | static int nfs_show_stats(struct seq_file *, struct vfsmount *); | |
816724e6 | 205 | static int nfs_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *); |
54ceac45 | 206 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, |
816724e6 | 207 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); |
f7b422b1 | 208 | static void nfs_kill_super(struct super_block *); |
ef818a28 | 209 | static void nfs_put_super(struct super_block *); |
f7b422b1 DH |
210 | |
211 | static struct file_system_type nfs_fs_type = { | |
212 | .owner = THIS_MODULE, | |
213 | .name = "nfs", | |
214 | .get_sb = nfs_get_sb, | |
215 | .kill_sb = nfs_kill_super, | |
349457cc | 216 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
217 | }; |
218 | ||
54ceac45 | 219 | struct file_system_type nfs_xdev_fs_type = { |
f7b422b1 DH |
220 | .owner = THIS_MODULE, |
221 | .name = "nfs", | |
54ceac45 | 222 | .get_sb = nfs_xdev_get_sb, |
f7b422b1 | 223 | .kill_sb = nfs_kill_super, |
349457cc | 224 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
225 | }; |
226 | ||
ee9b6d61 | 227 | static const struct super_operations nfs_sops = { |
f7b422b1 DH |
228 | .alloc_inode = nfs_alloc_inode, |
229 | .destroy_inode = nfs_destroy_inode, | |
230 | .write_inode = nfs_write_inode, | |
ef818a28 | 231 | .put_super = nfs_put_super, |
f7b422b1 DH |
232 | .statfs = nfs_statfs, |
233 | .clear_inode = nfs_clear_inode, | |
234 | .umount_begin = nfs_umount_begin, | |
235 | .show_options = nfs_show_options, | |
236 | .show_stats = nfs_show_stats, | |
237 | }; | |
238 | ||
239 | #ifdef CONFIG_NFS_V4 | |
816724e6 TM |
240 | static int nfs4_get_sb(struct file_system_type *fs_type, |
241 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
54ceac45 DH |
242 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, |
243 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
244 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, | |
245 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
f7b422b1 DH |
246 | static void nfs4_kill_super(struct super_block *sb); |
247 | ||
248 | static struct file_system_type nfs4_fs_type = { | |
249 | .owner = THIS_MODULE, | |
250 | .name = "nfs4", | |
251 | .get_sb = nfs4_get_sb, | |
252 | .kill_sb = nfs4_kill_super, | |
349457cc | 253 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
254 | }; |
255 | ||
54ceac45 | 256 | struct file_system_type nfs4_xdev_fs_type = { |
f7b422b1 DH |
257 | .owner = THIS_MODULE, |
258 | .name = "nfs4", | |
54ceac45 | 259 | .get_sb = nfs4_xdev_get_sb, |
f7b422b1 | 260 | .kill_sb = nfs4_kill_super, |
349457cc | 261 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
262 | }; |
263 | ||
54ceac45 | 264 | struct file_system_type nfs4_referral_fs_type = { |
f7b422b1 DH |
265 | .owner = THIS_MODULE, |
266 | .name = "nfs4", | |
54ceac45 | 267 | .get_sb = nfs4_referral_get_sb, |
f7b422b1 | 268 | .kill_sb = nfs4_kill_super, |
349457cc | 269 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
270 | }; |
271 | ||
ee9b6d61 | 272 | static const struct super_operations nfs4_sops = { |
f7b422b1 DH |
273 | .alloc_inode = nfs_alloc_inode, |
274 | .destroy_inode = nfs_destroy_inode, | |
275 | .write_inode = nfs_write_inode, | |
276 | .statfs = nfs_statfs, | |
277 | .clear_inode = nfs4_clear_inode, | |
278 | .umount_begin = nfs_umount_begin, | |
279 | .show_options = nfs_show_options, | |
280 | .show_stats = nfs_show_stats, | |
281 | }; | |
282 | #endif | |
283 | ||
8e1f936b RR |
284 | static struct shrinker acl_shrinker = { |
285 | .shrink = nfs_access_cache_shrinker, | |
286 | .seeks = DEFAULT_SEEKS, | |
287 | }; | |
979df72e | 288 | |
f7b422b1 DH |
289 | /* |
290 | * Register the NFS filesystems | |
291 | */ | |
292 | int __init register_nfs_fs(void) | |
293 | { | |
294 | int ret; | |
295 | ||
296 | ret = register_filesystem(&nfs_fs_type); | |
297 | if (ret < 0) | |
298 | goto error_0; | |
299 | ||
f7b422b1 DH |
300 | ret = nfs_register_sysctl(); |
301 | if (ret < 0) | |
302 | goto error_1; | |
89a09141 | 303 | #ifdef CONFIG_NFS_V4 |
f7b422b1 DH |
304 | ret = register_filesystem(&nfs4_fs_type); |
305 | if (ret < 0) | |
306 | goto error_2; | |
307 | #endif | |
8e1f936b | 308 | register_shrinker(&acl_shrinker); |
f7b422b1 DH |
309 | return 0; |
310 | ||
311 | #ifdef CONFIG_NFS_V4 | |
312 | error_2: | |
313 | nfs_unregister_sysctl(); | |
89a09141 | 314 | #endif |
f7b422b1 DH |
315 | error_1: |
316 | unregister_filesystem(&nfs_fs_type); | |
f7b422b1 DH |
317 | error_0: |
318 | return ret; | |
319 | } | |
320 | ||
321 | /* | |
322 | * Unregister the NFS filesystems | |
323 | */ | |
324 | void __exit unregister_nfs_fs(void) | |
325 | { | |
8e1f936b | 326 | unregister_shrinker(&acl_shrinker); |
f7b422b1 DH |
327 | #ifdef CONFIG_NFS_V4 |
328 | unregister_filesystem(&nfs4_fs_type); | |
f7b422b1 | 329 | #endif |
49af7ee1 | 330 | nfs_unregister_sysctl(); |
f7b422b1 DH |
331 | unregister_filesystem(&nfs_fs_type); |
332 | } | |
333 | ||
ef818a28 SD |
334 | void nfs_sb_active(struct nfs_server *server) |
335 | { | |
336 | atomic_inc(&server->active); | |
337 | } | |
338 | ||
339 | void nfs_sb_deactive(struct nfs_server *server) | |
340 | { | |
341 | if (atomic_dec_and_test(&server->active)) | |
342 | wake_up(&server->active_wq); | |
343 | } | |
344 | ||
345 | static void nfs_put_super(struct super_block *sb) | |
346 | { | |
347 | struct nfs_server *server = NFS_SB(sb); | |
348 | /* | |
349 | * Make sure there are no outstanding ops to this server. | |
350 | * If so, wait for them to finish before allowing the | |
351 | * unmount to continue. | |
352 | */ | |
353 | wait_event(server->active_wq, atomic_read(&server->active) == 0); | |
354 | } | |
355 | ||
f7b422b1 DH |
356 | /* |
357 | * Deliver file system statistics to userspace | |
358 | */ | |
816724e6 | 359 | static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
f7b422b1 | 360 | { |
0c7d90cf | 361 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
f7b422b1 DH |
362 | unsigned char blockbits; |
363 | unsigned long blockres; | |
0c7d90cf | 364 | struct nfs_fh *fh = NFS_FH(dentry->d_inode); |
f7b422b1 DH |
365 | struct nfs_fattr fattr; |
366 | struct nfs_fsstat res = { | |
367 | .fattr = &fattr, | |
368 | }; | |
369 | int error; | |
370 | ||
371 | lock_kernel(); | |
372 | ||
8fa5c000 | 373 | error = server->nfs_client->rpc_ops->statfs(server, fh, &res); |
f7b422b1 DH |
374 | if (error < 0) |
375 | goto out_err; | |
1a0ba9ae | 376 | buf->f_type = NFS_SUPER_MAGIC; |
f7b422b1 DH |
377 | |
378 | /* | |
379 | * Current versions of glibc do not correctly handle the | |
380 | * case where f_frsize != f_bsize. Eventually we want to | |
381 | * report the value of wtmult in this field. | |
382 | */ | |
0c7d90cf | 383 | buf->f_frsize = dentry->d_sb->s_blocksize; |
f7b422b1 DH |
384 | |
385 | /* | |
386 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
387 | * are reported in units of f_frsize. Linux hasn't had | |
388 | * an f_frsize field in its statfs struct until recently, | |
389 | * thus historically Linux's sys_statfs reports these | |
390 | * fields in units of f_bsize. | |
391 | */ | |
0c7d90cf DH |
392 | buf->f_bsize = dentry->d_sb->s_blocksize; |
393 | blockbits = dentry->d_sb->s_blocksize_bits; | |
f7b422b1 DH |
394 | blockres = (1 << blockbits) - 1; |
395 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
396 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
397 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
398 | ||
399 | buf->f_files = res.tfiles; | |
400 | buf->f_ffree = res.afiles; | |
401 | ||
402 | buf->f_namelen = server->namelen; | |
1a0ba9ae | 403 | |
f7b422b1 DH |
404 | unlock_kernel(); |
405 | return 0; | |
406 | ||
407 | out_err: | |
408 | dprintk("%s: statfs error = %d\n", __FUNCTION__, -error); | |
1a0ba9ae AA |
409 | unlock_kernel(); |
410 | return error; | |
f7b422b1 DH |
411 | } |
412 | ||
7d4e2747 DH |
413 | /* |
414 | * Map the security flavour number to a name | |
415 | */ | |
81039f1f TM |
416 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
417 | { | |
7d4e2747 | 418 | static const struct { |
81039f1f TM |
419 | rpc_authflavor_t flavour; |
420 | const char *str; | |
421 | } sec_flavours[] = { | |
422 | { RPC_AUTH_NULL, "null" }, | |
423 | { RPC_AUTH_UNIX, "sys" }, | |
424 | { RPC_AUTH_GSS_KRB5, "krb5" }, | |
425 | { RPC_AUTH_GSS_KRB5I, "krb5i" }, | |
426 | { RPC_AUTH_GSS_KRB5P, "krb5p" }, | |
427 | { RPC_AUTH_GSS_LKEY, "lkey" }, | |
428 | { RPC_AUTH_GSS_LKEYI, "lkeyi" }, | |
429 | { RPC_AUTH_GSS_LKEYP, "lkeyp" }, | |
430 | { RPC_AUTH_GSS_SPKM, "spkm" }, | |
431 | { RPC_AUTH_GSS_SPKMI, "spkmi" }, | |
432 | { RPC_AUTH_GSS_SPKMP, "spkmp" }, | |
4d81cd16 | 433 | { UINT_MAX, "unknown" } |
81039f1f TM |
434 | }; |
435 | int i; | |
436 | ||
4d81cd16 | 437 | for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) { |
81039f1f TM |
438 | if (sec_flavours[i].flavour == flavour) |
439 | break; | |
440 | } | |
441 | return sec_flavours[i].str; | |
442 | } | |
443 | ||
f7b422b1 DH |
444 | /* |
445 | * Describe the mount options in force on this server representation | |
446 | */ | |
447 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults) | |
448 | { | |
509de811 | 449 | static const struct proc_nfs_info { |
f7b422b1 | 450 | int flag; |
509de811 DH |
451 | const char *str; |
452 | const char *nostr; | |
f7b422b1 DH |
453 | } nfs_info[] = { |
454 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, | |
f7b422b1 DH |
455 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
456 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
457 | { NFS_MOUNT_NONLM, ",nolock", "" }, | |
458 | { NFS_MOUNT_NOACL, ",noacl", "" }, | |
74dd34e6 | 459 | { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" }, |
75180df2 | 460 | { NFS_MOUNT_UNSHARED, ",nosharecache", ""}, |
f7b422b1 DH |
461 | { 0, NULL, NULL } |
462 | }; | |
509de811 | 463 | const struct proc_nfs_info *nfs_infop; |
8fa5c000 | 464 | struct nfs_client *clp = nfss->nfs_client; |
f7b422b1 | 465 | |
8fa5c000 | 466 | seq_printf(m, ",vers=%d", clp->rpc_ops->version); |
f7b422b1 DH |
467 | seq_printf(m, ",rsize=%d", nfss->rsize); |
468 | seq_printf(m, ",wsize=%d", nfss->wsize); | |
469 | if (nfss->acregmin != 3*HZ || showdefaults) | |
470 | seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ); | |
471 | if (nfss->acregmax != 60*HZ || showdefaults) | |
472 | seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ); | |
473 | if (nfss->acdirmin != 30*HZ || showdefaults) | |
474 | seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ); | |
475 | if (nfss->acdirmax != 60*HZ || showdefaults) | |
476 | seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ); | |
477 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { | |
478 | if (nfss->flags & nfs_infop->flag) | |
479 | seq_puts(m, nfs_infop->str); | |
480 | else | |
481 | seq_puts(m, nfs_infop->nostr); | |
482 | } | |
56928edd TT |
483 | seq_printf(m, ",proto=%s", |
484 | rpc_peeraddr2str(nfss->client, RPC_DISPLAY_PROTO)); | |
33170233 TM |
485 | seq_printf(m, ",timeo=%lu", 10U * nfss->client->cl_timeout->to_initval / HZ); |
486 | seq_printf(m, ",retrans=%u", nfss->client->cl_timeout->to_retries); | |
81039f1f | 487 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
f7b422b1 DH |
488 | } |
489 | ||
490 | /* | |
491 | * Describe the mount options on this VFS mountpoint | |
492 | */ | |
493 | static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) | |
494 | { | |
495 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
496 | ||
497 | nfs_show_mount_options(m, nfss, 0); | |
498 | ||
5d8515ca CL |
499 | seq_printf(m, ",addr=%s", |
500 | rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient, | |
501 | RPC_DISPLAY_ADDR)); | |
f7b422b1 DH |
502 | |
503 | return 0; | |
504 | } | |
505 | ||
506 | /* | |
507 | * Present statistical information for this VFS mountpoint | |
508 | */ | |
509 | static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) | |
510 | { | |
511 | int i, cpu; | |
512 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
513 | struct rpc_auth *auth = nfss->client->cl_auth; | |
514 | struct nfs_iostats totals = { }; | |
515 | ||
516 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
517 | ||
518 | /* | |
519 | * Display all mount option settings | |
520 | */ | |
521 | seq_printf(m, "\n\topts:\t"); | |
522 | seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw"); | |
523 | seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); | |
524 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : ""); | |
525 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); | |
526 | nfs_show_mount_options(m, nfss, 1); | |
527 | ||
528 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); | |
529 | ||
530 | seq_printf(m, "\n\tcaps:\t"); | |
531 | seq_printf(m, "caps=0x%x", nfss->caps); | |
532 | seq_printf(m, ",wtmult=%d", nfss->wtmult); | |
533 | seq_printf(m, ",dtsize=%d", nfss->dtsize); | |
534 | seq_printf(m, ",bsize=%d", nfss->bsize); | |
535 | seq_printf(m, ",namelen=%d", nfss->namelen); | |
536 | ||
537 | #ifdef CONFIG_NFS_V4 | |
40c55319 | 538 | if (nfss->nfs_client->rpc_ops->version == 4) { |
f7b422b1 DH |
539 | seq_printf(m, "\n\tnfsv4:\t"); |
540 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); | |
541 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
542 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); | |
543 | } | |
544 | #endif | |
545 | ||
546 | /* | |
547 | * Display security flavor in effect for this mount | |
548 | */ | |
549 | seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor); | |
550 | if (auth->au_flavor) | |
551 | seq_printf(m, ",pseudoflavor=%d", auth->au_flavor); | |
552 | ||
553 | /* | |
554 | * Display superblock I/O counters | |
555 | */ | |
556 | for_each_possible_cpu(cpu) { | |
557 | struct nfs_iostats *stats; | |
558 | ||
559 | preempt_disable(); | |
560 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
561 | ||
562 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
563 | totals.events[i] += stats->events[i]; | |
564 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
565 | totals.bytes[i] += stats->bytes[i]; | |
566 | ||
567 | preempt_enable(); | |
568 | } | |
569 | ||
570 | seq_printf(m, "\n\tevents:\t"); | |
571 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
572 | seq_printf(m, "%lu ", totals.events[i]); | |
573 | seq_printf(m, "\n\tbytes:\t"); | |
574 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
575 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
576 | seq_printf(m, "\n"); | |
577 | ||
578 | rpc_print_iostats(m, nfss->client); | |
579 | ||
580 | return 0; | |
581 | } | |
582 | ||
583 | /* | |
584 | * Begin unmount by attempting to remove all automounted mountpoints we added | |
54ceac45 | 585 | * in response to xdev traversals and referrals |
f7b422b1 DH |
586 | */ |
587 | static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags) | |
588 | { | |
fc6ae3cf TM |
589 | struct nfs_server *server = NFS_SB(vfsmnt->mnt_sb); |
590 | struct rpc_clnt *rpc; | |
591 | ||
f7b422b1 | 592 | shrink_submounts(vfsmnt, &nfs_automount_list); |
fc6ae3cf TM |
593 | |
594 | if (!(flags & MNT_FORCE)) | |
595 | return; | |
596 | /* -EIO all pending I/O */ | |
597 | rpc = server->client_acl; | |
598 | if (!IS_ERR(rpc)) | |
599 | rpc_killall_tasks(rpc); | |
600 | rpc = server->client; | |
601 | if (!IS_ERR(rpc)) | |
602 | rpc_killall_tasks(rpc); | |
f7b422b1 DH |
603 | } |
604 | ||
04dcd6e3 CL |
605 | /* |
606 | * Set the port number in an address. Be agnostic about the address family. | |
607 | */ | |
608 | static void nfs_set_port(struct sockaddr *sap, unsigned short port) | |
609 | { | |
610 | switch (sap->sa_family) { | |
611 | case AF_INET: { | |
612 | struct sockaddr_in *ap = (struct sockaddr_in *)sap; | |
613 | ap->sin_port = htons(port); | |
614 | break; | |
615 | } | |
616 | case AF_INET6: { | |
617 | struct sockaddr_in6 *ap = (struct sockaddr_in6 *)sap; | |
618 | ap->sin6_port = htons(port); | |
619 | break; | |
620 | } | |
621 | } | |
622 | } | |
623 | ||
fc50d58f | 624 | /* |
cdcd7f9a CL |
625 | * Sanity-check a server address provided by the mount command. |
626 | * | |
627 | * Address family must be initialized, and address must not be | |
628 | * the ANY address for that family. | |
fc50d58f CL |
629 | */ |
630 | static int nfs_verify_server_address(struct sockaddr *addr) | |
631 | { | |
632 | switch (addr->sa_family) { | |
633 | case AF_INET: { | |
cdcd7f9a CL |
634 | struct sockaddr_in *sa = (struct sockaddr_in *)addr; |
635 | return sa->sin_addr.s_addr != INADDR_ANY; | |
636 | } | |
637 | case AF_INET6: { | |
638 | struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr; | |
639 | return !ipv6_addr_any(sa); | |
fc50d58f CL |
640 | } |
641 | } | |
642 | ||
643 | return 0; | |
644 | } | |
645 | ||
9412b927 CL |
646 | /* |
647 | * Parse string addresses passed in via a mount option, | |
648 | * and construct a sockaddr based on the result. | |
649 | * | |
650 | * If address parsing fails, set the sockaddr's address | |
651 | * family to AF_UNSPEC to force nfs_verify_server_address() | |
652 | * to punt the mount. | |
653 | */ | |
654 | static void nfs_parse_server_address(char *value, | |
4c568017 CL |
655 | struct sockaddr *sap, |
656 | size_t *len) | |
9412b927 | 657 | { |
3c7c7e48 CL |
658 | if (strchr(value, ':')) { |
659 | struct sockaddr_in6 *ap = (struct sockaddr_in6 *)sap; | |
660 | u8 *addr = (u8 *)&ap->sin6_addr.in6_u; | |
9412b927 | 661 | |
3c7c7e48 CL |
662 | ap->sin6_family = AF_INET6; |
663 | *len = sizeof(*ap); | |
664 | if (in6_pton(value, -1, addr, '\0', NULL)) | |
665 | return; | |
666 | } else { | |
667 | struct sockaddr_in *ap = (struct sockaddr_in *)sap; | |
668 | u8 *addr = (u8 *)&ap->sin_addr.s_addr; | |
669 | ||
670 | ap->sin_family = AF_INET; | |
671 | *len = sizeof(*ap); | |
672 | if (in4_pton(value, -1, addr, '\0', NULL)) | |
673 | return; | |
674 | } | |
9412b927 CL |
675 | |
676 | sap->sa_family = AF_UNSPEC; | |
4c568017 | 677 | *len = 0; |
9412b927 CL |
678 | } |
679 | ||
bf0fd768 CL |
680 | /* |
681 | * Error-check and convert a string of mount options from user space into | |
682 | * a data structure | |
683 | */ | |
684 | static int nfs_parse_mount_options(char *raw, | |
685 | struct nfs_parsed_mount_data *mnt) | |
686 | { | |
f9c3a380 | 687 | char *p, *string, *secdata; |
04dcd6e3 | 688 | unsigned short port = 0; |
f9c3a380 | 689 | int rc; |
bf0fd768 CL |
690 | |
691 | if (!raw) { | |
692 | dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); | |
693 | return 1; | |
694 | } | |
695 | dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); | |
696 | ||
f9c3a380 EP |
697 | secdata = alloc_secdata(); |
698 | if (!secdata) | |
699 | goto out_nomem; | |
700 | ||
701 | rc = security_sb_copy_data(raw, secdata); | |
702 | if (rc) | |
703 | goto out_security_failure; | |
704 | ||
705 | rc = security_sb_parse_opts_str(secdata, &mnt->lsm_opts); | |
706 | if (rc) | |
707 | goto out_security_failure; | |
708 | ||
709 | free_secdata(secdata); | |
710 | ||
bf0fd768 CL |
711 | while ((p = strsep(&raw, ",")) != NULL) { |
712 | substring_t args[MAX_OPT_ARGS]; | |
713 | int option, token; | |
714 | ||
715 | if (!*p) | |
716 | continue; | |
717 | ||
718 | dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); | |
719 | ||
720 | token = match_token(p, nfs_mount_option_tokens, args); | |
721 | switch (token) { | |
722 | case Opt_soft: | |
723 | mnt->flags |= NFS_MOUNT_SOFT; | |
724 | break; | |
725 | case Opt_hard: | |
726 | mnt->flags &= ~NFS_MOUNT_SOFT; | |
727 | break; | |
728 | case Opt_intr: | |
bf0fd768 | 729 | case Opt_nointr: |
bf0fd768 CL |
730 | break; |
731 | case Opt_posix: | |
732 | mnt->flags |= NFS_MOUNT_POSIX; | |
733 | break; | |
734 | case Opt_noposix: | |
735 | mnt->flags &= ~NFS_MOUNT_POSIX; | |
736 | break; | |
737 | case Opt_cto: | |
738 | mnt->flags &= ~NFS_MOUNT_NOCTO; | |
739 | break; | |
740 | case Opt_nocto: | |
741 | mnt->flags |= NFS_MOUNT_NOCTO; | |
742 | break; | |
743 | case Opt_ac: | |
744 | mnt->flags &= ~NFS_MOUNT_NOAC; | |
745 | break; | |
746 | case Opt_noac: | |
747 | mnt->flags |= NFS_MOUNT_NOAC; | |
748 | break; | |
749 | case Opt_lock: | |
750 | mnt->flags &= ~NFS_MOUNT_NONLM; | |
751 | break; | |
752 | case Opt_nolock: | |
753 | mnt->flags |= NFS_MOUNT_NONLM; | |
754 | break; | |
755 | case Opt_v2: | |
756 | mnt->flags &= ~NFS_MOUNT_VER3; | |
757 | break; | |
758 | case Opt_v3: | |
759 | mnt->flags |= NFS_MOUNT_VER3; | |
760 | break; | |
761 | case Opt_udp: | |
762 | mnt->flags &= ~NFS_MOUNT_TCP; | |
0896a725 | 763 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 CL |
764 | mnt->timeo = 7; |
765 | mnt->retrans = 5; | |
766 | break; | |
767 | case Opt_tcp: | |
768 | mnt->flags |= NFS_MOUNT_TCP; | |
0896a725 | 769 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 CL |
770 | mnt->timeo = 600; |
771 | mnt->retrans = 2; | |
772 | break; | |
2cf7ff7a TT |
773 | case Opt_rdma: |
774 | mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ | |
775 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
776 | mnt->timeo = 600; | |
777 | mnt->retrans = 2; | |
778 | break; | |
bf0fd768 CL |
779 | case Opt_acl: |
780 | mnt->flags &= ~NFS_MOUNT_NOACL; | |
781 | break; | |
782 | case Opt_noacl: | |
783 | mnt->flags |= NFS_MOUNT_NOACL; | |
784 | break; | |
785 | case Opt_rdirplus: | |
786 | mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; | |
787 | break; | |
788 | case Opt_nordirplus: | |
789 | mnt->flags |= NFS_MOUNT_NORDIRPLUS; | |
790 | break; | |
75180df2 TM |
791 | case Opt_sharecache: |
792 | mnt->flags &= ~NFS_MOUNT_UNSHARED; | |
793 | break; | |
794 | case Opt_nosharecache: | |
795 | mnt->flags |= NFS_MOUNT_UNSHARED; | |
796 | break; | |
bf0fd768 CL |
797 | |
798 | case Opt_port: | |
799 | if (match_int(args, &option)) | |
800 | return 0; | |
801 | if (option < 0 || option > 65535) | |
802 | return 0; | |
04dcd6e3 | 803 | port = option; |
bf0fd768 CL |
804 | break; |
805 | case Opt_rsize: | |
806 | if (match_int(args, &mnt->rsize)) | |
807 | return 0; | |
808 | break; | |
809 | case Opt_wsize: | |
810 | if (match_int(args, &mnt->wsize)) | |
811 | return 0; | |
812 | break; | |
813 | case Opt_bsize: | |
814 | if (match_int(args, &option)) | |
815 | return 0; | |
816 | if (option < 0) | |
817 | return 0; | |
818 | mnt->bsize = option; | |
819 | break; | |
820 | case Opt_timeo: | |
821 | if (match_int(args, &mnt->timeo)) | |
822 | return 0; | |
823 | break; | |
824 | case Opt_retrans: | |
825 | if (match_int(args, &mnt->retrans)) | |
826 | return 0; | |
827 | break; | |
828 | case Opt_acregmin: | |
829 | if (match_int(args, &mnt->acregmin)) | |
830 | return 0; | |
831 | break; | |
832 | case Opt_acregmax: | |
833 | if (match_int(args, &mnt->acregmax)) | |
834 | return 0; | |
835 | break; | |
836 | case Opt_acdirmin: | |
837 | if (match_int(args, &mnt->acdirmin)) | |
838 | return 0; | |
839 | break; | |
840 | case Opt_acdirmax: | |
841 | if (match_int(args, &mnt->acdirmax)) | |
842 | return 0; | |
843 | break; | |
844 | case Opt_actimeo: | |
845 | if (match_int(args, &option)) | |
846 | return 0; | |
847 | if (option < 0) | |
848 | return 0; | |
849 | mnt->acregmin = | |
850 | mnt->acregmax = | |
851 | mnt->acdirmin = | |
852 | mnt->acdirmax = option; | |
853 | break; | |
854 | case Opt_namelen: | |
855 | if (match_int(args, &mnt->namlen)) | |
856 | return 0; | |
857 | break; | |
858 | case Opt_mountport: | |
859 | if (match_int(args, &option)) | |
860 | return 0; | |
861 | if (option < 0 || option > 65535) | |
862 | return 0; | |
863 | mnt->mount_server.port = option; | |
864 | break; | |
bf0fd768 CL |
865 | case Opt_mountvers: |
866 | if (match_int(args, &option)) | |
867 | return 0; | |
868 | if (option < 0) | |
869 | return 0; | |
870 | mnt->mount_server.version = option; | |
871 | break; | |
bf0fd768 CL |
872 | case Opt_nfsvers: |
873 | if (match_int(args, &option)) | |
874 | return 0; | |
875 | switch (option) { | |
876 | case 2: | |
877 | mnt->flags &= ~NFS_MOUNT_VER3; | |
878 | break; | |
879 | case 3: | |
880 | mnt->flags |= NFS_MOUNT_VER3; | |
881 | break; | |
882 | default: | |
883 | goto out_unrec_vers; | |
884 | } | |
885 | break; | |
886 | ||
887 | case Opt_sec: | |
888 | string = match_strdup(args); | |
889 | if (string == NULL) | |
890 | goto out_nomem; | |
891 | token = match_token(string, nfs_secflavor_tokens, args); | |
892 | kfree(string); | |
893 | ||
894 | /* | |
895 | * The flags setting is for v2/v3. The flavor_len | |
896 | * setting is for v4. v2/v3 also need to know the | |
897 | * difference between NULL and UNIX. | |
898 | */ | |
899 | switch (token) { | |
900 | case Opt_sec_none: | |
901 | mnt->flags &= ~NFS_MOUNT_SECFLAVOUR; | |
902 | mnt->auth_flavor_len = 0; | |
903 | mnt->auth_flavors[0] = RPC_AUTH_NULL; | |
904 | break; | |
905 | case Opt_sec_sys: | |
906 | mnt->flags &= ~NFS_MOUNT_SECFLAVOUR; | |
907 | mnt->auth_flavor_len = 0; | |
908 | mnt->auth_flavors[0] = RPC_AUTH_UNIX; | |
909 | break; | |
910 | case Opt_sec_krb5: | |
911 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
912 | mnt->auth_flavor_len = 1; | |
913 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5; | |
914 | break; | |
915 | case Opt_sec_krb5i: | |
916 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
917 | mnt->auth_flavor_len = 1; | |
918 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I; | |
919 | break; | |
920 | case Opt_sec_krb5p: | |
921 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
922 | mnt->auth_flavor_len = 1; | |
923 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P; | |
924 | break; | |
925 | case Opt_sec_lkey: | |
926 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
927 | mnt->auth_flavor_len = 1; | |
928 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY; | |
929 | break; | |
930 | case Opt_sec_lkeyi: | |
931 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
932 | mnt->auth_flavor_len = 1; | |
933 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI; | |
934 | break; | |
935 | case Opt_sec_lkeyp: | |
936 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
937 | mnt->auth_flavor_len = 1; | |
938 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP; | |
939 | break; | |
940 | case Opt_sec_spkm: | |
941 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
942 | mnt->auth_flavor_len = 1; | |
943 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM; | |
944 | break; | |
945 | case Opt_sec_spkmi: | |
946 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
947 | mnt->auth_flavor_len = 1; | |
948 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI; | |
949 | break; | |
950 | case Opt_sec_spkmp: | |
951 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
952 | mnt->auth_flavor_len = 1; | |
953 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP; | |
954 | break; | |
955 | default: | |
956 | goto out_unrec_sec; | |
957 | } | |
958 | break; | |
959 | case Opt_proto: | |
960 | string = match_strdup(args); | |
961 | if (string == NULL) | |
962 | goto out_nomem; | |
963 | token = match_token(string, | |
964 | nfs_xprt_protocol_tokens, args); | |
965 | kfree(string); | |
966 | ||
967 | switch (token) { | |
fdb66ff4 | 968 | case Opt_xprt_udp: |
bf0fd768 | 969 | mnt->flags &= ~NFS_MOUNT_TCP; |
0896a725 | 970 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 CL |
971 | mnt->timeo = 7; |
972 | mnt->retrans = 5; | |
973 | break; | |
fdb66ff4 | 974 | case Opt_xprt_tcp: |
bf0fd768 | 975 | mnt->flags |= NFS_MOUNT_TCP; |
0896a725 | 976 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 CL |
977 | mnt->timeo = 600; |
978 | mnt->retrans = 2; | |
979 | break; | |
2cf7ff7a TT |
980 | case Opt_xprt_rdma: |
981 | /* vector side protocols to TCP */ | |
982 | mnt->flags |= NFS_MOUNT_TCP; | |
983 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
984 | mnt->timeo = 600; | |
985 | mnt->retrans = 2; | |
986 | break; | |
bf0fd768 CL |
987 | default: |
988 | goto out_unrec_xprt; | |
989 | } | |
990 | break; | |
991 | case Opt_mountproto: | |
992 | string = match_strdup(args); | |
993 | if (string == NULL) | |
994 | goto out_nomem; | |
995 | token = match_token(string, | |
996 | nfs_xprt_protocol_tokens, args); | |
997 | kfree(string); | |
998 | ||
999 | switch (token) { | |
fdb66ff4 | 1000 | case Opt_xprt_udp: |
0896a725 | 1001 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 | 1002 | break; |
fdb66ff4 | 1003 | case Opt_xprt_tcp: |
0896a725 | 1004 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1005 | break; |
2cf7ff7a | 1006 | case Opt_xprt_rdma: /* not used for side protocols */ |
bf0fd768 CL |
1007 | default: |
1008 | goto out_unrec_xprt; | |
1009 | } | |
1010 | break; | |
1011 | case Opt_addr: | |
1012 | string = match_strdup(args); | |
1013 | if (string == NULL) | |
1014 | goto out_nomem; | |
9412b927 | 1015 | nfs_parse_server_address(string, (struct sockaddr *) |
4c568017 CL |
1016 | &mnt->nfs_server.address, |
1017 | &mnt->nfs_server.addrlen); | |
bf0fd768 CL |
1018 | kfree(string); |
1019 | break; | |
1020 | case Opt_clientaddr: | |
1021 | string = match_strdup(args); | |
1022 | if (string == NULL) | |
1023 | goto out_nomem; | |
fc601477 | 1024 | kfree(mnt->client_address); |
bf0fd768 CL |
1025 | mnt->client_address = string; |
1026 | break; | |
33832034 CL |
1027 | case Opt_mounthost: |
1028 | string = match_strdup(args); | |
1029 | if (string == NULL) | |
1030 | goto out_nomem; | |
fc601477 | 1031 | kfree(mnt->mount_server.hostname); |
33832034 CL |
1032 | mnt->mount_server.hostname = string; |
1033 | break; | |
0ac83779 | 1034 | case Opt_mountaddr: |
bf0fd768 CL |
1035 | string = match_strdup(args); |
1036 | if (string == NULL) | |
1037 | goto out_nomem; | |
9412b927 | 1038 | nfs_parse_server_address(string, (struct sockaddr *) |
4c568017 CL |
1039 | &mnt->mount_server.address, |
1040 | &mnt->mount_server.addrlen); | |
bf0fd768 CL |
1041 | kfree(string); |
1042 | break; | |
1043 | ||
1044 | case Opt_userspace: | |
1045 | case Opt_deprecated: | |
1046 | break; | |
1047 | ||
1048 | default: | |
1049 | goto out_unknown; | |
1050 | } | |
1051 | } | |
1052 | ||
04dcd6e3 CL |
1053 | nfs_set_port((struct sockaddr *)&mnt->nfs_server.address, port); |
1054 | ||
bf0fd768 CL |
1055 | return 1; |
1056 | ||
1057 | out_nomem: | |
1058 | printk(KERN_INFO "NFS: not enough memory to parse option\n"); | |
1059 | return 0; | |
f9c3a380 EP |
1060 | out_security_failure: |
1061 | free_secdata(secdata); | |
1062 | printk(KERN_INFO "NFS: security options invalid: %d\n", rc); | |
1063 | return 0; | |
bf0fd768 CL |
1064 | out_unrec_vers: |
1065 | printk(KERN_INFO "NFS: unrecognized NFS version number\n"); | |
1066 | return 0; | |
1067 | ||
1068 | out_unrec_xprt: | |
1069 | printk(KERN_INFO "NFS: unrecognized transport protocol\n"); | |
1070 | return 0; | |
1071 | ||
1072 | out_unrec_sec: | |
1073 | printk(KERN_INFO "NFS: unrecognized security flavor\n"); | |
1074 | return 0; | |
1075 | ||
1076 | out_unknown: | |
1077 | printk(KERN_INFO "NFS: unknown mount option: %s\n", p); | |
1078 | return 0; | |
1079 | } | |
1080 | ||
0076d7b7 CL |
1081 | /* |
1082 | * Use the remote server's MOUNT service to request the NFS file handle | |
1083 | * corresponding to the provided path. | |
1084 | */ | |
1085 | static int nfs_try_mount(struct nfs_parsed_mount_data *args, | |
1086 | struct nfs_fh *root_fh) | |
1087 | { | |
4c568017 | 1088 | struct sockaddr *sap = (struct sockaddr *)&args->mount_server.address; |
33832034 | 1089 | char *hostname; |
4c568017 | 1090 | int status; |
0076d7b7 CL |
1091 | |
1092 | if (args->mount_server.version == 0) { | |
1093 | if (args->flags & NFS_MOUNT_VER3) | |
1094 | args->mount_server.version = NFS_MNT3_VERSION; | |
1095 | else | |
1096 | args->mount_server.version = NFS_MNT_VERSION; | |
1097 | } | |
1098 | ||
33832034 CL |
1099 | if (args->mount_server.hostname) |
1100 | hostname = args->mount_server.hostname; | |
1101 | else | |
1102 | hostname = args->nfs_server.hostname; | |
1103 | ||
0076d7b7 CL |
1104 | /* |
1105 | * Construct the mount server's address. | |
1106 | */ | |
4c568017 CL |
1107 | if (args->mount_server.address.ss_family == AF_UNSPEC) { |
1108 | memcpy(sap, &args->nfs_server.address, | |
1109 | args->nfs_server.addrlen); | |
1110 | args->mount_server.addrlen = args->nfs_server.addrlen; | |
1111 | } | |
1112 | ||
aad70007 JL |
1113 | /* |
1114 | * autobind will be used if mount_server.port == 0 | |
1115 | */ | |
4c568017 | 1116 | nfs_set_port(sap, args->mount_server.port); |
0076d7b7 CL |
1117 | |
1118 | /* | |
1119 | * Now ask the mount server to map our export path | |
1120 | * to a file handle. | |
1121 | */ | |
4c568017 CL |
1122 | status = nfs_mount(sap, |
1123 | args->mount_server.addrlen, | |
33832034 | 1124 | hostname, |
0076d7b7 CL |
1125 | args->nfs_server.export_path, |
1126 | args->mount_server.version, | |
1127 | args->mount_server.protocol, | |
1128 | root_fh); | |
efd8340b CL |
1129 | if (status == 0) |
1130 | return 0; | |
0076d7b7 | 1131 | |
33832034 CL |
1132 | dfprintk(MOUNT, "NFS: unable to mount server %s, error %d", |
1133 | hostname, status); | |
0076d7b7 CL |
1134 | return status; |
1135 | } | |
1136 | ||
f7b422b1 | 1137 | /* |
54ceac45 DH |
1138 | * Validate the NFS2/NFS3 mount data |
1139 | * - fills in the mount root filehandle | |
136d558c CL |
1140 | * |
1141 | * For option strings, user space handles the following behaviors: | |
1142 | * | |
1143 | * + DNS: mapping server host name to IP address ("addr=" option) | |
1144 | * | |
1145 | * + failure mode: how to behave if a mount request can't be handled | |
1146 | * immediately ("fg/bg" option) | |
1147 | * | |
1148 | * + retry: how often to retry a mount request ("retry=" option) | |
1149 | * | |
1150 | * + breaking back: trying proto=udp after proto=tcp, v2 after v3, | |
1151 | * mountproto=tcp after mountproto=udp, and so on | |
f7b422b1 | 1152 | */ |
2283f8d6 TT |
1153 | static int nfs_validate_mount_data(void *options, |
1154 | struct nfs_parsed_mount_data *args, | |
136d558c CL |
1155 | struct nfs_fh *mntfh, |
1156 | const char *dev_name) | |
f7b422b1 | 1157 | { |
2283f8d6 | 1158 | struct nfs_mount_data *data = (struct nfs_mount_data *)options; |
136d558c | 1159 | |
f16c9603 RK |
1160 | memset(args, 0, sizeof(*args)); |
1161 | ||
5df36e78 CL |
1162 | if (data == NULL) |
1163 | goto out_no_data; | |
f7b422b1 | 1164 | |
2283f8d6 TT |
1165 | args->flags = (NFS_MOUNT_VER3 | NFS_MOUNT_TCP); |
1166 | args->rsize = NFS_MAX_FILE_IO_SIZE; | |
1167 | args->wsize = NFS_MAX_FILE_IO_SIZE; | |
1168 | args->timeo = 600; | |
1169 | args->retrans = 2; | |
1170 | args->acregmin = 3; | |
1171 | args->acregmax = 60; | |
1172 | args->acdirmin = 30; | |
1173 | args->acdirmax = 60; | |
0896a725 | 1174 | args->mount_server.protocol = XPRT_TRANSPORT_UDP; |
0896a725 | 1175 | args->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
2283f8d6 | 1176 | |
54ceac45 | 1177 | switch (data->version) { |
5df36e78 CL |
1178 | case 1: |
1179 | data->namlen = 0; | |
1180 | case 2: | |
1181 | data->bsize = 0; | |
1182 | case 3: | |
1183 | if (data->flags & NFS_MOUNT_VER3) | |
1184 | goto out_no_v3; | |
1185 | data->root.size = NFS2_FHSIZE; | |
1186 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
1187 | case 4: | |
1188 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1189 | goto out_no_sec; | |
1190 | case 5: | |
1191 | memset(data->context, 0, sizeof(data->context)); | |
1192 | case 6: | |
1193 | if (data->flags & NFS_MOUNT_VER3) | |
1194 | mntfh->size = data->root.size; | |
1195 | else | |
1196 | mntfh->size = NFS2_FHSIZE; | |
1197 | ||
1198 | if (mntfh->size > sizeof(mntfh->data)) | |
1199 | goto out_invalid_fh; | |
1200 | ||
1201 | memcpy(mntfh->data, data->root.data, mntfh->size); | |
1202 | if (mntfh->size < sizeof(mntfh->data)) | |
1203 | memset(mntfh->data + mntfh->size, 0, | |
1204 | sizeof(mntfh->data) - mntfh->size); | |
6e88e061 | 1205 | |
2283f8d6 TT |
1206 | /* |
1207 | * Translate to nfs_parsed_mount_data, which nfs_fill_super | |
1208 | * can deal with. | |
1209 | */ | |
1210 | args->flags = data->flags; | |
1211 | args->rsize = data->rsize; | |
1212 | args->wsize = data->wsize; | |
1213 | args->flags = data->flags; | |
1214 | args->timeo = data->timeo; | |
1215 | args->retrans = data->retrans; | |
1216 | args->acregmin = data->acregmin; | |
1217 | args->acregmax = data->acregmax; | |
1218 | args->acdirmin = data->acdirmin; | |
1219 | args->acdirmax = data->acdirmax; | |
4c568017 CL |
1220 | |
1221 | memcpy(&args->nfs_server.address, &data->addr, | |
1222 | sizeof(data->addr)); | |
1223 | args->nfs_server.addrlen = sizeof(data->addr); | |
1224 | if (!nfs_verify_server_address((struct sockaddr *) | |
1225 | &args->nfs_server.address)) | |
1226 | goto out_no_address; | |
1227 | ||
2283f8d6 | 1228 | if (!(data->flags & NFS_MOUNT_TCP)) |
0896a725 | 1229 | args->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
2283f8d6 TT |
1230 | /* N.B. caller will free nfs_server.hostname in all cases */ |
1231 | args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); | |
1232 | args->namlen = data->namlen; | |
1233 | args->bsize = data->bsize; | |
1234 | args->auth_flavors[0] = data->pseudoflavor; | |
f9c3a380 EP |
1235 | |
1236 | /* | |
1237 | * The legacy version 6 binary mount data from userspace has a | |
1238 | * field used only to transport selinux information into the | |
1239 | * the kernel. To continue to support that functionality we | |
1240 | * have a touch of selinux knowledge here in the NFS code. The | |
1241 | * userspace code converted context=blah to just blah so we are | |
1242 | * converting back to the full string selinux understands. | |
1243 | */ | |
1244 | if (data->context[0]){ | |
1245 | #ifdef CONFIG_SECURITY_SELINUX | |
1246 | int rc; | |
1247 | char *opts_str = kmalloc(sizeof(data->context) + 8, GFP_KERNEL); | |
1248 | if (!opts_str) | |
1249 | return -ENOMEM; | |
1250 | strcpy(opts_str, "context="); | |
1251 | data->context[NFS_MAX_CONTEXT_LEN] = '\0'; | |
1252 | strcat(opts_str, &data->context[0]); | |
1253 | rc = security_sb_parse_opts_str(opts_str, &args->lsm_opts); | |
1254 | kfree(opts_str); | |
1255 | if (rc) | |
1256 | return rc; | |
1257 | #else | |
1258 | return -EINVAL; | |
1259 | #endif | |
1260 | } | |
1261 | ||
5df36e78 | 1262 | break; |
136d558c CL |
1263 | default: { |
1264 | unsigned int len; | |
1265 | char *c; | |
1266 | int status; | |
136d558c | 1267 | |
2283f8d6 TT |
1268 | if (nfs_parse_mount_options((char *)options, args) == 0) |
1269 | return -EINVAL; | |
136d558c | 1270 | |
6e88e061 CL |
1271 | if (!nfs_verify_server_address((struct sockaddr *) |
1272 | &args->nfs_server.address)) | |
1273 | goto out_no_address; | |
1274 | ||
136d558c CL |
1275 | c = strchr(dev_name, ':'); |
1276 | if (c == NULL) | |
1277 | return -EINVAL; | |
350c73af | 1278 | len = c - dev_name; |
2283f8d6 TT |
1279 | /* N.B. caller will free nfs_server.hostname in all cases */ |
1280 | args->nfs_server.hostname = kstrndup(dev_name, len, GFP_KERNEL); | |
136d558c CL |
1281 | |
1282 | c++; | |
1283 | if (strlen(c) > NFS_MAXPATHLEN) | |
7d1cca72 | 1284 | return -ENAMETOOLONG; |
2283f8d6 | 1285 | args->nfs_server.export_path = c; |
136d558c | 1286 | |
2283f8d6 | 1287 | status = nfs_try_mount(args, mntfh); |
136d558c | 1288 | if (status) |
fdc6e2c8 | 1289 | return status; |
136d558c | 1290 | |
136d558c CL |
1291 | break; |
1292 | } | |
f7b422b1 | 1293 | } |
54ceac45 | 1294 | |
2283f8d6 TT |
1295 | if (!(args->flags & NFS_MOUNT_SECFLAVOUR)) |
1296 | args->auth_flavors[0] = RPC_AUTH_UNIX; | |
36b15c54 | 1297 | |
54ceac45 | 1298 | #ifndef CONFIG_NFS_V3 |
2283f8d6 | 1299 | if (args->flags & NFS_MOUNT_VER3) |
5df36e78 CL |
1300 | goto out_v3_not_compiled; |
1301 | #endif /* !CONFIG_NFS_V3 */ | |
f7b422b1 | 1302 | |
5df36e78 | 1303 | return 0; |
f7b422b1 | 1304 | |
5df36e78 CL |
1305 | out_no_data: |
1306 | dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); | |
1307 | return -EINVAL; | |
54ceac45 | 1308 | |
5df36e78 CL |
1309 | out_no_v3: |
1310 | dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", | |
1311 | data->version); | |
1312 | return -EINVAL; | |
f7b422b1 | 1313 | |
5df36e78 CL |
1314 | out_no_sec: |
1315 | dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); | |
1316 | return -EINVAL; | |
1317 | ||
5df36e78 CL |
1318 | #ifndef CONFIG_NFS_V3 |
1319 | out_v3_not_compiled: | |
1320 | dfprintk(MOUNT, "NFS: NFSv3 is not compiled into kernel\n"); | |
1321 | return -EPROTONOSUPPORT; | |
1322 | #endif /* !CONFIG_NFS_V3 */ | |
1323 | ||
1324 | out_no_address: | |
1325 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); | |
1326 | return -EINVAL; | |
1327 | ||
1328 | out_invalid_fh: | |
1329 | dfprintk(MOUNT, "NFS: invalid root filehandle\n"); | |
1330 | return -EINVAL; | |
f7b422b1 DH |
1331 | } |
1332 | ||
f7b422b1 | 1333 | /* |
54ceac45 | 1334 | * Initialise the common bits of the superblock |
f7b422b1 | 1335 | */ |
54ceac45 | 1336 | static inline void nfs_initialise_sb(struct super_block *sb) |
f7b422b1 | 1337 | { |
54ceac45 | 1338 | struct nfs_server *server = NFS_SB(sb); |
5006a76c | 1339 | |
54ceac45 | 1340 | sb->s_magic = NFS_SUPER_MAGIC; |
f7b422b1 | 1341 | |
54ceac45 DH |
1342 | /* We probably want something more informative here */ |
1343 | snprintf(sb->s_id, sizeof(sb->s_id), | |
1344 | "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev)); | |
5006a76c | 1345 | |
54ceac45 DH |
1346 | if (sb->s_blocksize == 0) |
1347 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
1348 | &sb->s_blocksize_bits); | |
f7b422b1 | 1349 | |
54ceac45 DH |
1350 | if (server->flags & NFS_MOUNT_NOAC) |
1351 | sb->s_flags |= MS_SYNCHRONOUS; | |
f7b422b1 | 1352 | |
54ceac45 | 1353 | nfs_super_set_maxbytes(sb, server->maxfilesize); |
f7b422b1 DH |
1354 | } |
1355 | ||
1356 | /* | |
54ceac45 | 1357 | * Finish setting up an NFS2/3 superblock |
f7b422b1 | 1358 | */ |
2283f8d6 TT |
1359 | static void nfs_fill_super(struct super_block *sb, |
1360 | struct nfs_parsed_mount_data *data) | |
f7b422b1 DH |
1361 | { |
1362 | struct nfs_server *server = NFS_SB(sb); | |
5006a76c | 1363 | |
54ceac45 DH |
1364 | sb->s_blocksize_bits = 0; |
1365 | sb->s_blocksize = 0; | |
1366 | if (data->bsize) | |
1367 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); | |
f7b422b1 | 1368 | |
54ceac45 DH |
1369 | if (server->flags & NFS_MOUNT_VER3) { |
1370 | /* The VFS shouldn't apply the umask to mode bits. We will do | |
1371 | * so ourselves when necessary. | |
1372 | */ | |
1373 | sb->s_flags |= MS_POSIXACL; | |
1374 | sb->s_time_gran = 1; | |
816724e6 | 1375 | } |
54ceac45 DH |
1376 | |
1377 | sb->s_op = &nfs_sops; | |
1378 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1379 | } |
1380 | ||
1381 | /* | |
54ceac45 | 1382 | * Finish setting up a cloned NFS2/3 superblock |
f7b422b1 | 1383 | */ |
54ceac45 DH |
1384 | static void nfs_clone_super(struct super_block *sb, |
1385 | const struct super_block *old_sb) | |
f7b422b1 | 1386 | { |
54ceac45 DH |
1387 | struct nfs_server *server = NFS_SB(sb); |
1388 | ||
1389 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; | |
1390 | sb->s_blocksize = old_sb->s_blocksize; | |
1391 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 1392 | |
f7b422b1 | 1393 | if (server->flags & NFS_MOUNT_VER3) { |
54ceac45 DH |
1394 | /* The VFS shouldn't apply the umask to mode bits. We will do |
1395 | * so ourselves when necessary. | |
f7b422b1 DH |
1396 | */ |
1397 | sb->s_flags |= MS_POSIXACL; | |
f7b422b1 | 1398 | sb->s_time_gran = 1; |
f7b422b1 DH |
1399 | } |
1400 | ||
54ceac45 DH |
1401 | sb->s_op = old_sb->s_op; |
1402 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1403 | } |
1404 | ||
275a5d24 TM |
1405 | #define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS) |
1406 | ||
1407 | static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags) | |
1408 | { | |
1409 | const struct nfs_server *a = s->s_fs_info; | |
1410 | const struct rpc_clnt *clnt_a = a->client; | |
1411 | const struct rpc_clnt *clnt_b = b->client; | |
1412 | ||
1413 | if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK)) | |
1414 | goto Ebusy; | |
1415 | if (a->nfs_client != b->nfs_client) | |
1416 | goto Ebusy; | |
1417 | if (a->flags != b->flags) | |
1418 | goto Ebusy; | |
1419 | if (a->wsize != b->wsize) | |
1420 | goto Ebusy; | |
1421 | if (a->rsize != b->rsize) | |
1422 | goto Ebusy; | |
1423 | if (a->acregmin != b->acregmin) | |
1424 | goto Ebusy; | |
1425 | if (a->acregmax != b->acregmax) | |
1426 | goto Ebusy; | |
1427 | if (a->acdirmin != b->acdirmin) | |
1428 | goto Ebusy; | |
1429 | if (a->acdirmax != b->acdirmax) | |
1430 | goto Ebusy; | |
1431 | if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) | |
1432 | goto Ebusy; | |
e89a5a43 | 1433 | return 1; |
275a5d24 | 1434 | Ebusy: |
e89a5a43 TM |
1435 | return 0; |
1436 | } | |
1437 | ||
1438 | struct nfs_sb_mountdata { | |
1439 | struct nfs_server *server; | |
1440 | int mntflags; | |
1441 | }; | |
1442 | ||
1443 | static int nfs_set_super(struct super_block *s, void *data) | |
1444 | { | |
1445 | struct nfs_sb_mountdata *sb_mntdata = data; | |
1446 | struct nfs_server *server = sb_mntdata->server; | |
1447 | int ret; | |
1448 | ||
1449 | s->s_flags = sb_mntdata->mntflags; | |
1450 | s->s_fs_info = server; | |
1451 | ret = set_anon_super(s, server); | |
1452 | if (ret == 0) | |
1453 | server->s_dev = s->s_dev; | |
1454 | return ret; | |
1455 | } | |
1456 | ||
fd00a8ff CL |
1457 | static int nfs_compare_super_address(struct nfs_server *server1, |
1458 | struct nfs_server *server2) | |
1459 | { | |
1460 | struct sockaddr *sap1, *sap2; | |
1461 | ||
1462 | sap1 = (struct sockaddr *)&server1->nfs_client->cl_addr; | |
1463 | sap2 = (struct sockaddr *)&server2->nfs_client->cl_addr; | |
1464 | ||
1465 | if (sap1->sa_family != sap2->sa_family) | |
1466 | return 0; | |
1467 | ||
1468 | switch (sap1->sa_family) { | |
1469 | case AF_INET: { | |
1470 | struct sockaddr_in *sin1 = (struct sockaddr_in *)sap1; | |
1471 | struct sockaddr_in *sin2 = (struct sockaddr_in *)sap2; | |
1472 | if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) | |
1473 | return 0; | |
1474 | if (sin1->sin_port != sin2->sin_port) | |
1475 | return 0; | |
1476 | break; | |
1477 | } | |
1478 | case AF_INET6: { | |
1479 | struct sockaddr_in6 *sin1 = (struct sockaddr_in6 *)sap1; | |
1480 | struct sockaddr_in6 *sin2 = (struct sockaddr_in6 *)sap2; | |
1481 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) | |
1482 | return 0; | |
1483 | if (sin1->sin6_port != sin2->sin6_port) | |
1484 | return 0; | |
1485 | break; | |
1486 | } | |
1487 | default: | |
1488 | return 0; | |
1489 | } | |
1490 | ||
1491 | return 1; | |
1492 | } | |
1493 | ||
e89a5a43 TM |
1494 | static int nfs_compare_super(struct super_block *sb, void *data) |
1495 | { | |
1496 | struct nfs_sb_mountdata *sb_mntdata = data; | |
1497 | struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb); | |
1498 | int mntflags = sb_mntdata->mntflags; | |
1499 | ||
fd00a8ff | 1500 | if (!nfs_compare_super_address(old, server)) |
e89a5a43 TM |
1501 | return 0; |
1502 | /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */ | |
1503 | if (old->flags & NFS_MOUNT_UNSHARED) | |
1504 | return 0; | |
1505 | if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0) | |
1506 | return 0; | |
1507 | return nfs_compare_mount_options(sb, server, mntflags); | |
275a5d24 TM |
1508 | } |
1509 | ||
816724e6 TM |
1510 | static int nfs_get_sb(struct file_system_type *fs_type, |
1511 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
f7b422b1 | 1512 | { |
f7b422b1 DH |
1513 | struct nfs_server *server = NULL; |
1514 | struct super_block *s; | |
54ceac45 | 1515 | struct nfs_fh mntfh; |
2283f8d6 | 1516 | struct nfs_parsed_mount_data data; |
54ceac45 | 1517 | struct dentry *mntroot; |
75180df2 | 1518 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1519 | struct nfs_sb_mountdata sb_mntdata = { |
1520 | .mntflags = flags, | |
1521 | }; | |
54ceac45 | 1522 | int error; |
f7b422b1 | 1523 | |
f9c3a380 EP |
1524 | security_init_mnt_opts(&data.lsm_opts); |
1525 | ||
54ceac45 | 1526 | /* Validate the mount data */ |
2283f8d6 | 1527 | error = nfs_validate_mount_data(raw_data, &data, &mntfh, dev_name); |
54ceac45 | 1528 | if (error < 0) |
0655960f | 1529 | goto out; |
f7b422b1 | 1530 | |
54ceac45 | 1531 | /* Get a volume representation */ |
2283f8d6 | 1532 | server = nfs_create_server(&data, &mntfh); |
54ceac45 DH |
1533 | if (IS_ERR(server)) { |
1534 | error = PTR_ERR(server); | |
0655960f | 1535 | goto out; |
f7b422b1 | 1536 | } |
e89a5a43 | 1537 | sb_mntdata.server = server; |
f7b422b1 | 1538 | |
75180df2 TM |
1539 | if (server->flags & NFS_MOUNT_UNSHARED) |
1540 | compare_super = NULL; | |
1541 | ||
54ceac45 | 1542 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1543 | s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
1544 | if (IS_ERR(s)) { |
1545 | error = PTR_ERR(s); | |
54ceac45 | 1546 | goto out_err_nosb; |
816724e6 TM |
1547 | } |
1548 | ||
54ceac45 DH |
1549 | if (s->s_fs_info != server) { |
1550 | nfs_free_server(server); | |
1551 | server = NULL; | |
1552 | } | |
f7b422b1 | 1553 | |
54ceac45 DH |
1554 | if (!s->s_root) { |
1555 | /* initial superblock/root creation */ | |
2283f8d6 | 1556 | nfs_fill_super(s, &data); |
54ceac45 | 1557 | } |
f7b422b1 | 1558 | |
54ceac45 DH |
1559 | mntroot = nfs_get_root(s, &mntfh); |
1560 | if (IS_ERR(mntroot)) { | |
1561 | error = PTR_ERR(mntroot); | |
1562 | goto error_splat_super; | |
f7b422b1 | 1563 | } |
816724e6 | 1564 | |
f9c3a380 EP |
1565 | error = security_sb_set_mnt_opts(s, &data.lsm_opts); |
1566 | if (error) | |
1567 | goto error_splat_root; | |
1568 | ||
54ceac45 DH |
1569 | s->s_flags |= MS_ACTIVE; |
1570 | mnt->mnt_sb = s; | |
1571 | mnt->mnt_root = mntroot; | |
0655960f CL |
1572 | error = 0; |
1573 | ||
1574 | out: | |
2283f8d6 | 1575 | kfree(data.nfs_server.hostname); |
33832034 | 1576 | kfree(data.mount_server.hostname); |
f9c3a380 | 1577 | security_free_mnt_opts(&data.lsm_opts); |
0655960f | 1578 | return error; |
816724e6 | 1579 | |
54ceac45 DH |
1580 | out_err_nosb: |
1581 | nfs_free_server(server); | |
0655960f | 1582 | goto out; |
54ceac45 | 1583 | |
f9c3a380 EP |
1584 | error_splat_root: |
1585 | dput(mntroot); | |
54ceac45 DH |
1586 | error_splat_super: |
1587 | up_write(&s->s_umount); | |
1588 | deactivate_super(s); | |
0655960f | 1589 | goto out; |
f7b422b1 DH |
1590 | } |
1591 | ||
54ceac45 DH |
1592 | /* |
1593 | * Destroy an NFS2/3 superblock | |
1594 | */ | |
f7b422b1 DH |
1595 | static void nfs_kill_super(struct super_block *s) |
1596 | { | |
1597 | struct nfs_server *server = NFS_SB(s); | |
1598 | ||
1599 | kill_anon_super(s); | |
54ceac45 | 1600 | nfs_free_server(server); |
f7b422b1 DH |
1601 | } |
1602 | ||
54ceac45 DH |
1603 | /* |
1604 | * Clone an NFS2/3 server record on xdev traversal (FSID-change) | |
1605 | */ | |
1606 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags, | |
1607 | const char *dev_name, void *raw_data, | |
1608 | struct vfsmount *mnt) | |
f7b422b1 DH |
1609 | { |
1610 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
1611 | struct super_block *s; |
1612 | struct nfs_server *server; | |
1613 | struct dentry *mntroot; | |
75180df2 | 1614 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1615 | struct nfs_sb_mountdata sb_mntdata = { |
1616 | .mntflags = flags, | |
1617 | }; | |
54ceac45 | 1618 | int error; |
f7b422b1 | 1619 | |
54ceac45 | 1620 | dprintk("--> nfs_xdev_get_sb()\n"); |
f7b422b1 | 1621 | |
54ceac45 DH |
1622 | /* create a new volume representation */ |
1623 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
1624 | if (IS_ERR(server)) { | |
1625 | error = PTR_ERR(server); | |
1626 | goto out_err_noserver; | |
1627 | } | |
e89a5a43 | 1628 | sb_mntdata.server = server; |
8fa5c000 | 1629 | |
75180df2 TM |
1630 | if (server->flags & NFS_MOUNT_UNSHARED) |
1631 | compare_super = NULL; | |
1632 | ||
54ceac45 | 1633 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1634 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
1635 | if (IS_ERR(s)) { |
1636 | error = PTR_ERR(s); | |
1637 | goto out_err_nosb; | |
1638 | } | |
5006a76c | 1639 | |
54ceac45 DH |
1640 | if (s->s_fs_info != server) { |
1641 | nfs_free_server(server); | |
1642 | server = NULL; | |
f7b422b1 | 1643 | } |
24c8dbbb | 1644 | |
54ceac45 DH |
1645 | if (!s->s_root) { |
1646 | /* initial superblock/root creation */ | |
54ceac45 DH |
1647 | nfs_clone_super(s, data->sb); |
1648 | } | |
f7b422b1 | 1649 | |
54ceac45 DH |
1650 | mntroot = nfs_get_root(s, data->fh); |
1651 | if (IS_ERR(mntroot)) { | |
1652 | error = PTR_ERR(mntroot); | |
1653 | goto error_splat_super; | |
f7b422b1 | 1654 | } |
e9cc6c23 | 1655 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
4c1fe2f7 NB |
1656 | dput(mntroot); |
1657 | error = -ESTALE; | |
1658 | goto error_splat_super; | |
1659 | } | |
f7b422b1 | 1660 | |
54ceac45 DH |
1661 | s->s_flags |= MS_ACTIVE; |
1662 | mnt->mnt_sb = s; | |
1663 | mnt->mnt_root = mntroot; | |
f7b422b1 | 1664 | |
f9c3a380 EP |
1665 | /* clone any lsm security options from the parent to the new sb */ |
1666 | security_sb_clone_mnt_opts(data->sb, s); | |
1667 | ||
54ceac45 DH |
1668 | dprintk("<-- nfs_xdev_get_sb() = 0\n"); |
1669 | return 0; | |
24c8dbbb | 1670 | |
54ceac45 DH |
1671 | out_err_nosb: |
1672 | nfs_free_server(server); | |
1673 | out_err_noserver: | |
1674 | dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error); | |
1675 | return error; | |
f7b422b1 | 1676 | |
54ceac45 DH |
1677 | error_splat_super: |
1678 | up_write(&s->s_umount); | |
1679 | deactivate_super(s); | |
1680 | dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error); | |
1681 | return error; | |
f7b422b1 DH |
1682 | } |
1683 | ||
54ceac45 DH |
1684 | #ifdef CONFIG_NFS_V4 |
1685 | ||
f7b422b1 | 1686 | /* |
54ceac45 | 1687 | * Finish setting up a cloned NFS4 superblock |
f7b422b1 | 1688 | */ |
54ceac45 DH |
1689 | static void nfs4_clone_super(struct super_block *sb, |
1690 | const struct super_block *old_sb) | |
f7b422b1 | 1691 | { |
54ceac45 DH |
1692 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; |
1693 | sb->s_blocksize = old_sb->s_blocksize; | |
1694 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 1695 | sb->s_time_gran = 1; |
54ceac45 DH |
1696 | sb->s_op = old_sb->s_op; |
1697 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1698 | } |
1699 | ||
54ceac45 DH |
1700 | /* |
1701 | * Set up an NFS4 superblock | |
1702 | */ | |
1703 | static void nfs4_fill_super(struct super_block *sb) | |
f7b422b1 | 1704 | { |
54ceac45 DH |
1705 | sb->s_time_gran = 1; |
1706 | sb->s_op = &nfs4_sops; | |
1707 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1708 | } |
1709 | ||
0d0f0c19 CL |
1710 | /* |
1711 | * If the user didn't specify a port, set the port number to | |
1712 | * the NFS version 4 default port. | |
1713 | */ | |
1714 | static void nfs4_default_port(struct sockaddr *sap) | |
1715 | { | |
1716 | switch (sap->sa_family) { | |
1717 | case AF_INET: { | |
1718 | struct sockaddr_in *ap = (struct sockaddr_in *)sap; | |
1719 | if (ap->sin_port == 0) | |
1720 | ap->sin_port = htons(NFS_PORT); | |
1721 | break; | |
1722 | } | |
1723 | case AF_INET6: { | |
1724 | struct sockaddr_in6 *ap = (struct sockaddr_in6 *)sap; | |
1725 | if (ap->sin6_port == 0) | |
1726 | ap->sin6_port = htons(NFS_PORT); | |
1727 | break; | |
1728 | } | |
1729 | } | |
1730 | } | |
1731 | ||
f0768ebd CL |
1732 | /* |
1733 | * Validate NFSv4 mount options | |
1734 | */ | |
91ea40b9 TT |
1735 | static int nfs4_validate_mount_data(void *options, |
1736 | struct nfs_parsed_mount_data *args, | |
1737 | const char *dev_name) | |
f0768ebd | 1738 | { |
4c568017 | 1739 | struct sockaddr_in *ap; |
91ea40b9 | 1740 | struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; |
f0768ebd CL |
1741 | char *c; |
1742 | ||
f16c9603 RK |
1743 | memset(args, 0, sizeof(*args)); |
1744 | ||
f0768ebd CL |
1745 | if (data == NULL) |
1746 | goto out_no_data; | |
1747 | ||
91ea40b9 TT |
1748 | args->rsize = NFS_MAX_FILE_IO_SIZE; |
1749 | args->wsize = NFS_MAX_FILE_IO_SIZE; | |
1750 | args->timeo = 600; | |
1751 | args->retrans = 2; | |
1752 | args->acregmin = 3; | |
1753 | args->acregmax = 60; | |
1754 | args->acdirmin = 30; | |
1755 | args->acdirmax = 60; | |
0896a725 | 1756 | args->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
91ea40b9 | 1757 | |
f0768ebd CL |
1758 | switch (data->version) { |
1759 | case 1: | |
4c568017 CL |
1760 | ap = (struct sockaddr_in *)&args->nfs_server.address; |
1761 | if (data->host_addrlen > sizeof(args->nfs_server.address)) | |
1762 | goto out_no_address; | |
1763 | if (data->host_addrlen == 0) | |
f0768ebd | 1764 | goto out_no_address; |
4c568017 CL |
1765 | args->nfs_server.addrlen = data->host_addrlen; |
1766 | if (copy_from_user(ap, data->host_addr, data->host_addrlen)) | |
f0768ebd | 1767 | return -EFAULT; |
91ea40b9 TT |
1768 | if (!nfs_verify_server_address((struct sockaddr *) |
1769 | &args->nfs_server.address)) | |
f0768ebd CL |
1770 | goto out_no_address; |
1771 | ||
0d0f0c19 CL |
1772 | nfs4_default_port((struct sockaddr *) |
1773 | &args->nfs_server.address); | |
1774 | ||
f0768ebd CL |
1775 | switch (data->auth_flavourlen) { |
1776 | case 0: | |
91ea40b9 | 1777 | args->auth_flavors[0] = RPC_AUTH_UNIX; |
f0768ebd CL |
1778 | break; |
1779 | case 1: | |
20c71f5e | 1780 | if (copy_from_user(&args->auth_flavors[0], |
91ea40b9 | 1781 | data->auth_flavours, |
20c71f5e | 1782 | sizeof(args->auth_flavors[0]))) |
f0768ebd CL |
1783 | return -EFAULT; |
1784 | break; | |
1785 | default: | |
1786 | goto out_inval_auth; | |
1787 | } | |
1788 | ||
1789 | c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); | |
1790 | if (IS_ERR(c)) | |
1791 | return PTR_ERR(c); | |
91ea40b9 | 1792 | args->nfs_server.hostname = c; |
f0768ebd CL |
1793 | |
1794 | c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); | |
1795 | if (IS_ERR(c)) | |
1796 | return PTR_ERR(c); | |
91ea40b9 TT |
1797 | args->nfs_server.export_path = c; |
1798 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); | |
f0768ebd CL |
1799 | |
1800 | c = strndup_user(data->client_addr.data, 16); | |
1801 | if (IS_ERR(c)) | |
1802 | return PTR_ERR(c); | |
91ea40b9 TT |
1803 | args->client_address = c; |
1804 | ||
1805 | /* | |
1806 | * Translate to nfs_parsed_mount_data, which nfs4_fill_super | |
1807 | * can deal with. | |
1808 | */ | |
1809 | ||
1810 | args->flags = data->flags & NFS4_MOUNT_FLAGMASK; | |
1811 | args->rsize = data->rsize; | |
1812 | args->wsize = data->wsize; | |
1813 | args->timeo = data->timeo; | |
1814 | args->retrans = data->retrans; | |
1815 | args->acregmin = data->acregmin; | |
1816 | args->acregmax = data->acregmax; | |
1817 | args->acdirmin = data->acdirmin; | |
1818 | args->acdirmax = data->acdirmax; | |
1819 | args->nfs_server.protocol = data->proto; | |
f0768ebd CL |
1820 | |
1821 | break; | |
80071225 CL |
1822 | default: { |
1823 | unsigned int len; | |
91ea40b9 TT |
1824 | |
1825 | if (nfs_parse_mount_options((char *)options, args) == 0) | |
80071225 CL |
1826 | return -EINVAL; |
1827 | ||
1828 | if (!nfs_verify_server_address((struct sockaddr *) | |
91ea40b9 | 1829 | &args->nfs_server.address)) |
80071225 | 1830 | return -EINVAL; |
80071225 | 1831 | |
0d0f0c19 CL |
1832 | nfs4_default_port((struct sockaddr *) |
1833 | &args->nfs_server.address); | |
1834 | ||
91ea40b9 | 1835 | switch (args->auth_flavor_len) { |
80071225 | 1836 | case 0: |
91ea40b9 | 1837 | args->auth_flavors[0] = RPC_AUTH_UNIX; |
80071225 CL |
1838 | break; |
1839 | case 1: | |
80071225 CL |
1840 | break; |
1841 | default: | |
1842 | goto out_inval_auth; | |
1843 | } | |
1844 | ||
80071225 CL |
1845 | /* |
1846 | * Split "dev_name" into "hostname:mntpath". | |
1847 | */ | |
1848 | c = strchr(dev_name, ':'); | |
1849 | if (c == NULL) | |
1850 | return -EINVAL; | |
1851 | /* while calculating len, pretend ':' is '\0' */ | |
1852 | len = c - dev_name; | |
1853 | if (len > NFS4_MAXNAMLEN) | |
7d1cca72 | 1854 | return -ENAMETOOLONG; |
6a0ed1de CL |
1855 | /* N.B. caller will free nfs_server.hostname in all cases */ |
1856 | args->nfs_server.hostname = kstrndup(dev_name, len, GFP_KERNEL); | |
80071225 CL |
1857 | |
1858 | c++; /* step over the ':' */ | |
1859 | len = strlen(c); | |
1860 | if (len > NFS4_MAXPATHLEN) | |
7d1cca72 | 1861 | return -ENAMETOOLONG; |
6a0ed1de | 1862 | args->nfs_server.export_path = kstrndup(c, len, GFP_KERNEL); |
80071225 | 1863 | |
6a0ed1de | 1864 | dprintk("NFS: MNTPATH: '%s'\n", args->nfs_server.export_path); |
80071225 | 1865 | |
91ea40b9 | 1866 | if (args->client_address == NULL) |
0a87cf12 JL |
1867 | goto out_no_client_address; |
1868 | ||
80071225 CL |
1869 | break; |
1870 | } | |
f0768ebd CL |
1871 | } |
1872 | ||
1873 | return 0; | |
1874 | ||
1875 | out_no_data: | |
1876 | dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); | |
1877 | return -EINVAL; | |
1878 | ||
1879 | out_inval_auth: | |
1880 | dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", | |
1881 | data->auth_flavourlen); | |
1882 | return -EINVAL; | |
1883 | ||
1884 | out_no_address: | |
1885 | dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); | |
1886 | return -EINVAL; | |
0a87cf12 JL |
1887 | |
1888 | out_no_client_address: | |
1889 | dfprintk(MOUNT, "NFS4: mount program didn't pass callback address\n"); | |
1890 | return -EINVAL; | |
f0768ebd CL |
1891 | } |
1892 | ||
54ceac45 DH |
1893 | /* |
1894 | * Get the superblock for an NFS4 mountpoint | |
1895 | */ | |
816724e6 TM |
1896 | static int nfs4_get_sb(struct file_system_type *fs_type, |
1897 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
f7b422b1 | 1898 | { |
91ea40b9 | 1899 | struct nfs_parsed_mount_data data; |
54ceac45 DH |
1900 | struct super_block *s; |
1901 | struct nfs_server *server; | |
54ceac45 DH |
1902 | struct nfs_fh mntfh; |
1903 | struct dentry *mntroot; | |
75180df2 | 1904 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1905 | struct nfs_sb_mountdata sb_mntdata = { |
1906 | .mntflags = flags, | |
1907 | }; | |
54ceac45 | 1908 | int error; |
f7b422b1 | 1909 | |
f9c3a380 EP |
1910 | security_init_mnt_opts(&data.lsm_opts); |
1911 | ||
f0768ebd | 1912 | /* Validate the mount data */ |
91ea40b9 | 1913 | error = nfs4_validate_mount_data(raw_data, &data, dev_name); |
f0768ebd CL |
1914 | if (error < 0) |
1915 | goto out; | |
f7b422b1 | 1916 | |
54ceac45 | 1917 | /* Get a volume representation */ |
91ea40b9 | 1918 | server = nfs4_create_server(&data, &mntfh); |
54ceac45 DH |
1919 | if (IS_ERR(server)) { |
1920 | error = PTR_ERR(server); | |
29eb981a | 1921 | goto out; |
f7b422b1 | 1922 | } |
e89a5a43 | 1923 | sb_mntdata.server = server; |
f7b422b1 | 1924 | |
75180df2 TM |
1925 | if (server->flags & NFS4_MOUNT_UNSHARED) |
1926 | compare_super = NULL; | |
1927 | ||
54ceac45 | 1928 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1929 | s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
1930 | if (IS_ERR(s)) { |
1931 | error = PTR_ERR(s); | |
f7b422b1 | 1932 | goto out_free; |
816724e6 TM |
1933 | } |
1934 | ||
5dd3177a TM |
1935 | if (s->s_fs_info != server) { |
1936 | nfs_free_server(server); | |
1937 | server = NULL; | |
1938 | } | |
1939 | ||
54ceac45 DH |
1940 | if (!s->s_root) { |
1941 | /* initial superblock/root creation */ | |
54ceac45 | 1942 | nfs4_fill_super(s); |
54ceac45 | 1943 | } |
f7b422b1 | 1944 | |
54ceac45 DH |
1945 | mntroot = nfs4_get_root(s, &mntfh); |
1946 | if (IS_ERR(mntroot)) { | |
1947 | error = PTR_ERR(mntroot); | |
1948 | goto error_splat_super; | |
f7b422b1 | 1949 | } |
54ceac45 | 1950 | |
f7b422b1 | 1951 | s->s_flags |= MS_ACTIVE; |
54ceac45 DH |
1952 | mnt->mnt_sb = s; |
1953 | mnt->mnt_root = mntroot; | |
29eb981a CL |
1954 | error = 0; |
1955 | ||
1956 | out: | |
91ea40b9 TT |
1957 | kfree(data.client_address); |
1958 | kfree(data.nfs_server.export_path); | |
1959 | kfree(data.nfs_server.hostname); | |
f9c3a380 | 1960 | security_free_mnt_opts(&data.lsm_opts); |
29eb981a | 1961 | return error; |
54ceac45 | 1962 | |
f7b422b1 | 1963 | out_free: |
54ceac45 | 1964 | nfs_free_server(server); |
29eb981a | 1965 | goto out; |
54ceac45 DH |
1966 | |
1967 | error_splat_super: | |
1968 | up_write(&s->s_umount); | |
1969 | deactivate_super(s); | |
29eb981a | 1970 | goto out; |
f7b422b1 DH |
1971 | } |
1972 | ||
1973 | static void nfs4_kill_super(struct super_block *sb) | |
1974 | { | |
1975 | struct nfs_server *server = NFS_SB(sb); | |
1976 | ||
1977 | nfs_return_all_delegations(sb); | |
1978 | kill_anon_super(sb); | |
1979 | ||
1980 | nfs4_renewd_prepare_shutdown(server); | |
54ceac45 | 1981 | nfs_free_server(server); |
f7b422b1 DH |
1982 | } |
1983 | ||
1984 | /* | |
54ceac45 | 1985 | * Clone an NFS4 server record on xdev traversal (FSID-change) |
f7b422b1 | 1986 | */ |
54ceac45 DH |
1987 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags, |
1988 | const char *dev_name, void *raw_data, | |
1989 | struct vfsmount *mnt) | |
f7b422b1 | 1990 | { |
54ceac45 DH |
1991 | struct nfs_clone_mount *data = raw_data; |
1992 | struct super_block *s; | |
1993 | struct nfs_server *server; | |
1994 | struct dentry *mntroot; | |
75180df2 | 1995 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1996 | struct nfs_sb_mountdata sb_mntdata = { |
1997 | .mntflags = flags, | |
1998 | }; | |
54ceac45 | 1999 | int error; |
f7b422b1 | 2000 | |
54ceac45 | 2001 | dprintk("--> nfs4_xdev_get_sb()\n"); |
f7b422b1 | 2002 | |
54ceac45 DH |
2003 | /* create a new volume representation */ |
2004 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
2005 | if (IS_ERR(server)) { | |
2006 | error = PTR_ERR(server); | |
2007 | goto out_err_noserver; | |
f7b422b1 | 2008 | } |
e89a5a43 | 2009 | sb_mntdata.server = server; |
f7b422b1 | 2010 | |
75180df2 TM |
2011 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2012 | compare_super = NULL; | |
2013 | ||
54ceac45 | 2014 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 2015 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2016 | if (IS_ERR(s)) { |
2017 | error = PTR_ERR(s); | |
2018 | goto out_err_nosb; | |
f7b422b1 | 2019 | } |
f7b422b1 | 2020 | |
54ceac45 DH |
2021 | if (s->s_fs_info != server) { |
2022 | nfs_free_server(server); | |
2023 | server = NULL; | |
2024 | } | |
f7b422b1 | 2025 | |
54ceac45 DH |
2026 | if (!s->s_root) { |
2027 | /* initial superblock/root creation */ | |
54ceac45 DH |
2028 | nfs4_clone_super(s, data->sb); |
2029 | } | |
f7b422b1 | 2030 | |
54ceac45 DH |
2031 | mntroot = nfs4_get_root(s, data->fh); |
2032 | if (IS_ERR(mntroot)) { | |
2033 | error = PTR_ERR(mntroot); | |
2034 | goto error_splat_super; | |
2035 | } | |
e9cc6c23 TM |
2036 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
2037 | dput(mntroot); | |
2038 | error = -ESTALE; | |
2039 | goto error_splat_super; | |
2040 | } | |
f7b422b1 | 2041 | |
54ceac45 DH |
2042 | s->s_flags |= MS_ACTIVE; |
2043 | mnt->mnt_sb = s; | |
2044 | mnt->mnt_root = mntroot; | |
2045 | ||
2046 | dprintk("<-- nfs4_xdev_get_sb() = 0\n"); | |
2047 | return 0; | |
2048 | ||
2049 | out_err_nosb: | |
2050 | nfs_free_server(server); | |
2051 | out_err_noserver: | |
2052 | dprintk("<-- nfs4_xdev_get_sb() = %d [error]\n", error); | |
2053 | return error; | |
2054 | ||
2055 | error_splat_super: | |
2056 | up_write(&s->s_umount); | |
2057 | deactivate_super(s); | |
2058 | dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error); | |
2059 | return error; | |
f7b422b1 DH |
2060 | } |
2061 | ||
54ceac45 DH |
2062 | /* |
2063 | * Create an NFS4 server record on referral traversal | |
2064 | */ | |
2065 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, int flags, | |
2066 | const char *dev_name, void *raw_data, | |
2067 | struct vfsmount *mnt) | |
f7b422b1 DH |
2068 | { |
2069 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
2070 | struct super_block *s; |
2071 | struct nfs_server *server; | |
2072 | struct dentry *mntroot; | |
2073 | struct nfs_fh mntfh; | |
75180df2 | 2074 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2075 | struct nfs_sb_mountdata sb_mntdata = { |
2076 | .mntflags = flags, | |
2077 | }; | |
54ceac45 DH |
2078 | int error; |
2079 | ||
2080 | dprintk("--> nfs4_referral_get_sb()\n"); | |
2081 | ||
2082 | /* create a new volume representation */ | |
2083 | server = nfs4_create_referral_server(data, &mntfh); | |
2084 | if (IS_ERR(server)) { | |
2085 | error = PTR_ERR(server); | |
2086 | goto out_err_noserver; | |
2087 | } | |
e89a5a43 | 2088 | sb_mntdata.server = server; |
54ceac45 | 2089 | |
75180df2 TM |
2090 | if (server->flags & NFS4_MOUNT_UNSHARED) |
2091 | compare_super = NULL; | |
2092 | ||
54ceac45 | 2093 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 2094 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
2095 | if (IS_ERR(s)) { |
2096 | error = PTR_ERR(s); | |
2097 | goto out_err_nosb; | |
2098 | } | |
2099 | ||
2100 | if (s->s_fs_info != server) { | |
2101 | nfs_free_server(server); | |
2102 | server = NULL; | |
2103 | } | |
2104 | ||
2105 | if (!s->s_root) { | |
2106 | /* initial superblock/root creation */ | |
54ceac45 DH |
2107 | nfs4_fill_super(s); |
2108 | } | |
2109 | ||
f2d0d85e | 2110 | mntroot = nfs4_get_root(s, &mntfh); |
54ceac45 DH |
2111 | if (IS_ERR(mntroot)) { |
2112 | error = PTR_ERR(mntroot); | |
2113 | goto error_splat_super; | |
2114 | } | |
e9cc6c23 TM |
2115 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
2116 | dput(mntroot); | |
2117 | error = -ESTALE; | |
2118 | goto error_splat_super; | |
2119 | } | |
54ceac45 DH |
2120 | |
2121 | s->s_flags |= MS_ACTIVE; | |
2122 | mnt->mnt_sb = s; | |
2123 | mnt->mnt_root = mntroot; | |
2124 | ||
2125 | dprintk("<-- nfs4_referral_get_sb() = 0\n"); | |
2126 | return 0; | |
2127 | ||
2128 | out_err_nosb: | |
2129 | nfs_free_server(server); | |
2130 | out_err_noserver: | |
2131 | dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error); | |
2132 | return error; | |
2133 | ||
2134 | error_splat_super: | |
2135 | up_write(&s->s_umount); | |
2136 | deactivate_super(s); | |
2137 | dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error); | |
2138 | return error; | |
f7b422b1 DH |
2139 | } |
2140 | ||
54ceac45 | 2141 | #endif /* CONFIG_NFS_V4 */ |