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> | |
48 | #include <linux/nfs_xdr.h> | |
b5d5dfbd | 49 | #include <linux/magic.h> |
bf0fd768 | 50 | #include <linux/parser.h> |
f7b422b1 DH |
51 | |
52 | #include <asm/system.h> | |
53 | #include <asm/uaccess.h> | |
54 | ||
55 | #include "nfs4_fs.h" | |
56 | #include "callback.h" | |
57 | #include "delegation.h" | |
58 | #include "iostat.h" | |
59 | #include "internal.h" | |
60 | ||
61 | #define NFSDBG_FACILITY NFSDBG_VFS | |
62 | ||
bf0fd768 CL |
63 | enum { |
64 | /* Mount options that take no arguments */ | |
65 | Opt_soft, Opt_hard, | |
66 | Opt_intr, Opt_nointr, | |
67 | Opt_posix, Opt_noposix, | |
68 | Opt_cto, Opt_nocto, | |
69 | Opt_ac, Opt_noac, | |
70 | Opt_lock, Opt_nolock, | |
71 | Opt_v2, Opt_v3, | |
2cf7ff7a | 72 | Opt_udp, Opt_tcp, Opt_rdma, |
bf0fd768 CL |
73 | Opt_acl, Opt_noacl, |
74 | Opt_rdirplus, Opt_nordirplus, | |
75180df2 | 75 | Opt_sharecache, Opt_nosharecache, |
bf0fd768 CL |
76 | |
77 | /* Mount options that take integer arguments */ | |
78 | Opt_port, | |
79 | Opt_rsize, Opt_wsize, Opt_bsize, | |
80 | Opt_timeo, Opt_retrans, | |
81 | Opt_acregmin, Opt_acregmax, | |
82 | Opt_acdirmin, Opt_acdirmax, | |
83 | Opt_actimeo, | |
84 | Opt_namelen, | |
85 | Opt_mountport, | |
e887cbcf | 86 | Opt_mountvers, |
ad879cef | 87 | Opt_nfsvers, |
bf0fd768 CL |
88 | |
89 | /* Mount options that take string arguments */ | |
90 | Opt_sec, Opt_proto, Opt_mountproto, | |
0ac83779 | 91 | Opt_addr, Opt_mountaddr, Opt_clientaddr, |
bf0fd768 CL |
92 | |
93 | /* Mount options that are ignored */ | |
94 | Opt_userspace, Opt_deprecated, | |
95 | ||
96 | Opt_err | |
97 | }; | |
98 | ||
99 | static match_table_t nfs_mount_option_tokens = { | |
100 | { Opt_userspace, "bg" }, | |
101 | { Opt_userspace, "fg" }, | |
102 | { Opt_soft, "soft" }, | |
103 | { Opt_hard, "hard" }, | |
104 | { Opt_intr, "intr" }, | |
105 | { Opt_nointr, "nointr" }, | |
106 | { Opt_posix, "posix" }, | |
107 | { Opt_noposix, "noposix" }, | |
108 | { Opt_cto, "cto" }, | |
109 | { Opt_nocto, "nocto" }, | |
110 | { Opt_ac, "ac" }, | |
111 | { Opt_noac, "noac" }, | |
112 | { Opt_lock, "lock" }, | |
113 | { Opt_nolock, "nolock" }, | |
114 | { Opt_v2, "v2" }, | |
115 | { Opt_v3, "v3" }, | |
116 | { Opt_udp, "udp" }, | |
117 | { Opt_tcp, "tcp" }, | |
2cf7ff7a | 118 | { Opt_rdma, "rdma" }, |
bf0fd768 CL |
119 | { Opt_acl, "acl" }, |
120 | { Opt_noacl, "noacl" }, | |
121 | { Opt_rdirplus, "rdirplus" }, | |
122 | { Opt_nordirplus, "nordirplus" }, | |
75180df2 TM |
123 | { Opt_sharecache, "sharecache" }, |
124 | { Opt_nosharecache, "nosharecache" }, | |
bf0fd768 CL |
125 | |
126 | { Opt_port, "port=%u" }, | |
127 | { Opt_rsize, "rsize=%u" }, | |
128 | { Opt_wsize, "wsize=%u" }, | |
129 | { Opt_bsize, "bsize=%u" }, | |
130 | { Opt_timeo, "timeo=%u" }, | |
131 | { Opt_retrans, "retrans=%u" }, | |
132 | { Opt_acregmin, "acregmin=%u" }, | |
133 | { Opt_acregmax, "acregmax=%u" }, | |
134 | { Opt_acdirmin, "acdirmin=%u" }, | |
135 | { Opt_acdirmax, "acdirmax=%u" }, | |
136 | { Opt_actimeo, "actimeo=%u" }, | |
137 | { Opt_userspace, "retry=%u" }, | |
138 | { Opt_namelen, "namlen=%u" }, | |
139 | { Opt_mountport, "mountport=%u" }, | |
bf0fd768 | 140 | { Opt_mountvers, "mountvers=%u" }, |
bf0fd768 CL |
141 | { Opt_nfsvers, "nfsvers=%u" }, |
142 | { Opt_nfsvers, "vers=%u" }, | |
143 | ||
144 | { Opt_sec, "sec=%s" }, | |
145 | { Opt_proto, "proto=%s" }, | |
146 | { Opt_mountproto, "mountproto=%s" }, | |
147 | { Opt_addr, "addr=%s" }, | |
148 | { Opt_clientaddr, "clientaddr=%s" }, | |
0ac83779 CL |
149 | { Opt_userspace, "mounthost=%s" }, |
150 | { Opt_mountaddr, "mountaddr=%s" }, | |
bf0fd768 CL |
151 | |
152 | { Opt_err, NULL } | |
153 | }; | |
154 | ||
155 | enum { | |
2cf7ff7a | 156 | Opt_xprt_udp, Opt_xprt_tcp, Opt_xprt_rdma, |
bf0fd768 CL |
157 | |
158 | Opt_xprt_err | |
159 | }; | |
160 | ||
161 | static match_table_t nfs_xprt_protocol_tokens = { | |
162 | { Opt_xprt_udp, "udp" }, | |
163 | { Opt_xprt_tcp, "tcp" }, | |
2cf7ff7a | 164 | { Opt_xprt_rdma, "rdma" }, |
bf0fd768 CL |
165 | |
166 | { Opt_xprt_err, NULL } | |
167 | }; | |
168 | ||
169 | enum { | |
170 | Opt_sec_none, Opt_sec_sys, | |
171 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
172 | Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, | |
173 | Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, | |
174 | ||
175 | Opt_sec_err | |
176 | }; | |
177 | ||
178 | static match_table_t nfs_secflavor_tokens = { | |
179 | { Opt_sec_none, "none" }, | |
180 | { Opt_sec_none, "null" }, | |
181 | { Opt_sec_sys, "sys" }, | |
182 | ||
183 | { Opt_sec_krb5, "krb5" }, | |
184 | { Opt_sec_krb5i, "krb5i" }, | |
185 | { Opt_sec_krb5p, "krb5p" }, | |
186 | ||
187 | { Opt_sec_lkey, "lkey" }, | |
188 | { Opt_sec_lkeyi, "lkeyi" }, | |
189 | { Opt_sec_lkeyp, "lkeyp" }, | |
190 | ||
191 | { Opt_sec_err, NULL } | |
192 | }; | |
193 | ||
194 | ||
f7b422b1 | 195 | static void nfs_umount_begin(struct vfsmount *, int); |
816724e6 | 196 | static int nfs_statfs(struct dentry *, struct kstatfs *); |
f7b422b1 DH |
197 | static int nfs_show_options(struct seq_file *, struct vfsmount *); |
198 | static int nfs_show_stats(struct seq_file *, struct vfsmount *); | |
816724e6 | 199 | static int nfs_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *); |
54ceac45 | 200 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, |
816724e6 | 201 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); |
f7b422b1 | 202 | static void nfs_kill_super(struct super_block *); |
ef818a28 | 203 | static void nfs_put_super(struct super_block *); |
f7b422b1 DH |
204 | |
205 | static struct file_system_type nfs_fs_type = { | |
206 | .owner = THIS_MODULE, | |
207 | .name = "nfs", | |
208 | .get_sb = nfs_get_sb, | |
209 | .kill_sb = nfs_kill_super, | |
349457cc | 210 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
211 | }; |
212 | ||
54ceac45 | 213 | struct file_system_type nfs_xdev_fs_type = { |
f7b422b1 DH |
214 | .owner = THIS_MODULE, |
215 | .name = "nfs", | |
54ceac45 | 216 | .get_sb = nfs_xdev_get_sb, |
f7b422b1 | 217 | .kill_sb = nfs_kill_super, |
349457cc | 218 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
219 | }; |
220 | ||
ee9b6d61 | 221 | static const struct super_operations nfs_sops = { |
f7b422b1 DH |
222 | .alloc_inode = nfs_alloc_inode, |
223 | .destroy_inode = nfs_destroy_inode, | |
224 | .write_inode = nfs_write_inode, | |
ef818a28 | 225 | .put_super = nfs_put_super, |
f7b422b1 DH |
226 | .statfs = nfs_statfs, |
227 | .clear_inode = nfs_clear_inode, | |
228 | .umount_begin = nfs_umount_begin, | |
229 | .show_options = nfs_show_options, | |
230 | .show_stats = nfs_show_stats, | |
231 | }; | |
232 | ||
233 | #ifdef CONFIG_NFS_V4 | |
816724e6 TM |
234 | static int nfs4_get_sb(struct file_system_type *fs_type, |
235 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
54ceac45 DH |
236 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, |
237 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
238 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, | |
239 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
f7b422b1 DH |
240 | static void nfs4_kill_super(struct super_block *sb); |
241 | ||
242 | static struct file_system_type nfs4_fs_type = { | |
243 | .owner = THIS_MODULE, | |
244 | .name = "nfs4", | |
245 | .get_sb = nfs4_get_sb, | |
246 | .kill_sb = nfs4_kill_super, | |
349457cc | 247 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
248 | }; |
249 | ||
54ceac45 | 250 | struct file_system_type nfs4_xdev_fs_type = { |
f7b422b1 DH |
251 | .owner = THIS_MODULE, |
252 | .name = "nfs4", | |
54ceac45 | 253 | .get_sb = nfs4_xdev_get_sb, |
f7b422b1 | 254 | .kill_sb = nfs4_kill_super, |
349457cc | 255 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
256 | }; |
257 | ||
54ceac45 | 258 | struct file_system_type nfs4_referral_fs_type = { |
f7b422b1 DH |
259 | .owner = THIS_MODULE, |
260 | .name = "nfs4", | |
54ceac45 | 261 | .get_sb = nfs4_referral_get_sb, |
f7b422b1 | 262 | .kill_sb = nfs4_kill_super, |
349457cc | 263 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
264 | }; |
265 | ||
ee9b6d61 | 266 | static const struct super_operations nfs4_sops = { |
f7b422b1 DH |
267 | .alloc_inode = nfs_alloc_inode, |
268 | .destroy_inode = nfs_destroy_inode, | |
269 | .write_inode = nfs_write_inode, | |
270 | .statfs = nfs_statfs, | |
271 | .clear_inode = nfs4_clear_inode, | |
272 | .umount_begin = nfs_umount_begin, | |
273 | .show_options = nfs_show_options, | |
274 | .show_stats = nfs_show_stats, | |
275 | }; | |
276 | #endif | |
277 | ||
8e1f936b RR |
278 | static struct shrinker acl_shrinker = { |
279 | .shrink = nfs_access_cache_shrinker, | |
280 | .seeks = DEFAULT_SEEKS, | |
281 | }; | |
979df72e | 282 | |
f7b422b1 DH |
283 | /* |
284 | * Register the NFS filesystems | |
285 | */ | |
286 | int __init register_nfs_fs(void) | |
287 | { | |
288 | int ret; | |
289 | ||
290 | ret = register_filesystem(&nfs_fs_type); | |
291 | if (ret < 0) | |
292 | goto error_0; | |
293 | ||
f7b422b1 DH |
294 | ret = nfs_register_sysctl(); |
295 | if (ret < 0) | |
296 | goto error_1; | |
89a09141 | 297 | #ifdef CONFIG_NFS_V4 |
f7b422b1 DH |
298 | ret = register_filesystem(&nfs4_fs_type); |
299 | if (ret < 0) | |
300 | goto error_2; | |
301 | #endif | |
8e1f936b | 302 | register_shrinker(&acl_shrinker); |
f7b422b1 DH |
303 | return 0; |
304 | ||
305 | #ifdef CONFIG_NFS_V4 | |
306 | error_2: | |
307 | nfs_unregister_sysctl(); | |
89a09141 | 308 | #endif |
f7b422b1 DH |
309 | error_1: |
310 | unregister_filesystem(&nfs_fs_type); | |
f7b422b1 DH |
311 | error_0: |
312 | return ret; | |
313 | } | |
314 | ||
315 | /* | |
316 | * Unregister the NFS filesystems | |
317 | */ | |
318 | void __exit unregister_nfs_fs(void) | |
319 | { | |
8e1f936b | 320 | unregister_shrinker(&acl_shrinker); |
f7b422b1 DH |
321 | #ifdef CONFIG_NFS_V4 |
322 | unregister_filesystem(&nfs4_fs_type); | |
f7b422b1 | 323 | #endif |
49af7ee1 | 324 | nfs_unregister_sysctl(); |
f7b422b1 DH |
325 | unregister_filesystem(&nfs_fs_type); |
326 | } | |
327 | ||
ef818a28 SD |
328 | void nfs_sb_active(struct nfs_server *server) |
329 | { | |
330 | atomic_inc(&server->active); | |
331 | } | |
332 | ||
333 | void nfs_sb_deactive(struct nfs_server *server) | |
334 | { | |
335 | if (atomic_dec_and_test(&server->active)) | |
336 | wake_up(&server->active_wq); | |
337 | } | |
338 | ||
339 | static void nfs_put_super(struct super_block *sb) | |
340 | { | |
341 | struct nfs_server *server = NFS_SB(sb); | |
342 | /* | |
343 | * Make sure there are no outstanding ops to this server. | |
344 | * If so, wait for them to finish before allowing the | |
345 | * unmount to continue. | |
346 | */ | |
347 | wait_event(server->active_wq, atomic_read(&server->active) == 0); | |
348 | } | |
349 | ||
f7b422b1 DH |
350 | /* |
351 | * Deliver file system statistics to userspace | |
352 | */ | |
816724e6 | 353 | static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
f7b422b1 | 354 | { |
0c7d90cf | 355 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
f7b422b1 DH |
356 | unsigned char blockbits; |
357 | unsigned long blockres; | |
0c7d90cf | 358 | struct nfs_fh *fh = NFS_FH(dentry->d_inode); |
f7b422b1 DH |
359 | struct nfs_fattr fattr; |
360 | struct nfs_fsstat res = { | |
361 | .fattr = &fattr, | |
362 | }; | |
363 | int error; | |
364 | ||
365 | lock_kernel(); | |
366 | ||
8fa5c000 | 367 | error = server->nfs_client->rpc_ops->statfs(server, fh, &res); |
f7b422b1 DH |
368 | if (error < 0) |
369 | goto out_err; | |
1a0ba9ae | 370 | buf->f_type = NFS_SUPER_MAGIC; |
f7b422b1 DH |
371 | |
372 | /* | |
373 | * Current versions of glibc do not correctly handle the | |
374 | * case where f_frsize != f_bsize. Eventually we want to | |
375 | * report the value of wtmult in this field. | |
376 | */ | |
0c7d90cf | 377 | buf->f_frsize = dentry->d_sb->s_blocksize; |
f7b422b1 DH |
378 | |
379 | /* | |
380 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
381 | * are reported in units of f_frsize. Linux hasn't had | |
382 | * an f_frsize field in its statfs struct until recently, | |
383 | * thus historically Linux's sys_statfs reports these | |
384 | * fields in units of f_bsize. | |
385 | */ | |
0c7d90cf DH |
386 | buf->f_bsize = dentry->d_sb->s_blocksize; |
387 | blockbits = dentry->d_sb->s_blocksize_bits; | |
f7b422b1 DH |
388 | blockres = (1 << blockbits) - 1; |
389 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
390 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
391 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
392 | ||
393 | buf->f_files = res.tfiles; | |
394 | buf->f_ffree = res.afiles; | |
395 | ||
396 | buf->f_namelen = server->namelen; | |
1a0ba9ae | 397 | |
f7b422b1 DH |
398 | unlock_kernel(); |
399 | return 0; | |
400 | ||
401 | out_err: | |
402 | dprintk("%s: statfs error = %d\n", __FUNCTION__, -error); | |
1a0ba9ae AA |
403 | unlock_kernel(); |
404 | return error; | |
f7b422b1 DH |
405 | } |
406 | ||
7d4e2747 DH |
407 | /* |
408 | * Map the security flavour number to a name | |
409 | */ | |
81039f1f TM |
410 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
411 | { | |
7d4e2747 | 412 | static const struct { |
81039f1f TM |
413 | rpc_authflavor_t flavour; |
414 | const char *str; | |
415 | } sec_flavours[] = { | |
416 | { RPC_AUTH_NULL, "null" }, | |
417 | { RPC_AUTH_UNIX, "sys" }, | |
418 | { RPC_AUTH_GSS_KRB5, "krb5" }, | |
419 | { RPC_AUTH_GSS_KRB5I, "krb5i" }, | |
420 | { RPC_AUTH_GSS_KRB5P, "krb5p" }, | |
421 | { RPC_AUTH_GSS_LKEY, "lkey" }, | |
422 | { RPC_AUTH_GSS_LKEYI, "lkeyi" }, | |
423 | { RPC_AUTH_GSS_LKEYP, "lkeyp" }, | |
424 | { RPC_AUTH_GSS_SPKM, "spkm" }, | |
425 | { RPC_AUTH_GSS_SPKMI, "spkmi" }, | |
426 | { RPC_AUTH_GSS_SPKMP, "spkmp" }, | |
4d81cd16 | 427 | { UINT_MAX, "unknown" } |
81039f1f TM |
428 | }; |
429 | int i; | |
430 | ||
4d81cd16 | 431 | for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) { |
81039f1f TM |
432 | if (sec_flavours[i].flavour == flavour) |
433 | break; | |
434 | } | |
435 | return sec_flavours[i].str; | |
436 | } | |
437 | ||
f7b422b1 DH |
438 | /* |
439 | * Describe the mount options in force on this server representation | |
440 | */ | |
441 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults) | |
442 | { | |
509de811 | 443 | static const struct proc_nfs_info { |
f7b422b1 | 444 | int flag; |
509de811 DH |
445 | const char *str; |
446 | const char *nostr; | |
f7b422b1 DH |
447 | } nfs_info[] = { |
448 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, | |
bcf35617 | 449 | { NFS_MOUNT_INTR, ",intr", ",nointr" }, |
f7b422b1 DH |
450 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
451 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
452 | { NFS_MOUNT_NONLM, ",nolock", "" }, | |
453 | { NFS_MOUNT_NOACL, ",noacl", "" }, | |
74dd34e6 | 454 | { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" }, |
75180df2 | 455 | { NFS_MOUNT_UNSHARED, ",nosharecache", ""}, |
f7b422b1 DH |
456 | { 0, NULL, NULL } |
457 | }; | |
509de811 | 458 | const struct proc_nfs_info *nfs_infop; |
8fa5c000 | 459 | struct nfs_client *clp = nfss->nfs_client; |
f7b422b1 | 460 | |
8fa5c000 | 461 | seq_printf(m, ",vers=%d", clp->rpc_ops->version); |
f7b422b1 DH |
462 | seq_printf(m, ",rsize=%d", nfss->rsize); |
463 | seq_printf(m, ",wsize=%d", nfss->wsize); | |
464 | if (nfss->acregmin != 3*HZ || showdefaults) | |
465 | seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ); | |
466 | if (nfss->acregmax != 60*HZ || showdefaults) | |
467 | seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ); | |
468 | if (nfss->acdirmin != 30*HZ || showdefaults) | |
469 | seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ); | |
470 | if (nfss->acdirmax != 60*HZ || showdefaults) | |
471 | seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ); | |
472 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { | |
473 | if (nfss->flags & nfs_infop->flag) | |
474 | seq_puts(m, nfs_infop->str); | |
475 | else | |
476 | seq_puts(m, nfs_infop->nostr); | |
477 | } | |
56928edd TT |
478 | seq_printf(m, ",proto=%s", |
479 | rpc_peeraddr2str(nfss->client, RPC_DISPLAY_PROTO)); | |
5006a76c DH |
480 | seq_printf(m, ",timeo=%lu", 10U * clp->retrans_timeo / HZ); |
481 | seq_printf(m, ",retrans=%u", clp->retrans_count); | |
81039f1f | 482 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
f7b422b1 DH |
483 | } |
484 | ||
485 | /* | |
486 | * Describe the mount options on this VFS mountpoint | |
487 | */ | |
488 | static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) | |
489 | { | |
490 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
491 | ||
492 | nfs_show_mount_options(m, nfss, 0); | |
493 | ||
ddc01c08 JL |
494 | seq_printf(m, ",addr="NIPQUAD_FMT, |
495 | NIPQUAD(nfss->nfs_client->cl_addr.sin_addr)); | |
f7b422b1 DH |
496 | |
497 | return 0; | |
498 | } | |
499 | ||
500 | /* | |
501 | * Present statistical information for this VFS mountpoint | |
502 | */ | |
503 | static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) | |
504 | { | |
505 | int i, cpu; | |
506 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
507 | struct rpc_auth *auth = nfss->client->cl_auth; | |
508 | struct nfs_iostats totals = { }; | |
509 | ||
510 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
511 | ||
512 | /* | |
513 | * Display all mount option settings | |
514 | */ | |
515 | seq_printf(m, "\n\topts:\t"); | |
516 | seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw"); | |
517 | seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); | |
518 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : ""); | |
519 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); | |
520 | nfs_show_mount_options(m, nfss, 1); | |
521 | ||
522 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); | |
523 | ||
524 | seq_printf(m, "\n\tcaps:\t"); | |
525 | seq_printf(m, "caps=0x%x", nfss->caps); | |
526 | seq_printf(m, ",wtmult=%d", nfss->wtmult); | |
527 | seq_printf(m, ",dtsize=%d", nfss->dtsize); | |
528 | seq_printf(m, ",bsize=%d", nfss->bsize); | |
529 | seq_printf(m, ",namelen=%d", nfss->namelen); | |
530 | ||
531 | #ifdef CONFIG_NFS_V4 | |
40c55319 | 532 | if (nfss->nfs_client->rpc_ops->version == 4) { |
f7b422b1 DH |
533 | seq_printf(m, "\n\tnfsv4:\t"); |
534 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); | |
535 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
536 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); | |
537 | } | |
538 | #endif | |
539 | ||
540 | /* | |
541 | * Display security flavor in effect for this mount | |
542 | */ | |
543 | seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor); | |
544 | if (auth->au_flavor) | |
545 | seq_printf(m, ",pseudoflavor=%d", auth->au_flavor); | |
546 | ||
547 | /* | |
548 | * Display superblock I/O counters | |
549 | */ | |
550 | for_each_possible_cpu(cpu) { | |
551 | struct nfs_iostats *stats; | |
552 | ||
553 | preempt_disable(); | |
554 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
555 | ||
556 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
557 | totals.events[i] += stats->events[i]; | |
558 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
559 | totals.bytes[i] += stats->bytes[i]; | |
560 | ||
561 | preempt_enable(); | |
562 | } | |
563 | ||
564 | seq_printf(m, "\n\tevents:\t"); | |
565 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
566 | seq_printf(m, "%lu ", totals.events[i]); | |
567 | seq_printf(m, "\n\tbytes:\t"); | |
568 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
569 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
570 | seq_printf(m, "\n"); | |
571 | ||
572 | rpc_print_iostats(m, nfss->client); | |
573 | ||
574 | return 0; | |
575 | } | |
576 | ||
577 | /* | |
578 | * Begin unmount by attempting to remove all automounted mountpoints we added | |
54ceac45 | 579 | * in response to xdev traversals and referrals |
f7b422b1 DH |
580 | */ |
581 | static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags) | |
582 | { | |
fc6ae3cf TM |
583 | struct nfs_server *server = NFS_SB(vfsmnt->mnt_sb); |
584 | struct rpc_clnt *rpc; | |
585 | ||
f7b422b1 | 586 | shrink_submounts(vfsmnt, &nfs_automount_list); |
fc6ae3cf TM |
587 | |
588 | if (!(flags & MNT_FORCE)) | |
589 | return; | |
590 | /* -EIO all pending I/O */ | |
591 | rpc = server->client_acl; | |
592 | if (!IS_ERR(rpc)) | |
593 | rpc_killall_tasks(rpc); | |
594 | rpc = server->client; | |
595 | if (!IS_ERR(rpc)) | |
596 | rpc_killall_tasks(rpc); | |
f7b422b1 DH |
597 | } |
598 | ||
fc50d58f CL |
599 | /* |
600 | * Sanity-check a server address provided by the mount command | |
601 | */ | |
602 | static int nfs_verify_server_address(struct sockaddr *addr) | |
603 | { | |
604 | switch (addr->sa_family) { | |
605 | case AF_INET: { | |
606 | struct sockaddr_in *sa = (struct sockaddr_in *) addr; | |
607 | if (sa->sin_addr.s_addr != INADDR_ANY) | |
608 | return 1; | |
609 | break; | |
610 | } | |
611 | } | |
612 | ||
613 | return 0; | |
614 | } | |
615 | ||
bf0fd768 CL |
616 | /* |
617 | * Error-check and convert a string of mount options from user space into | |
618 | * a data structure | |
619 | */ | |
620 | static int nfs_parse_mount_options(char *raw, | |
621 | struct nfs_parsed_mount_data *mnt) | |
622 | { | |
623 | char *p, *string; | |
624 | ||
625 | if (!raw) { | |
626 | dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); | |
627 | return 1; | |
628 | } | |
629 | dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); | |
630 | ||
631 | while ((p = strsep(&raw, ",")) != NULL) { | |
632 | substring_t args[MAX_OPT_ARGS]; | |
633 | int option, token; | |
634 | ||
635 | if (!*p) | |
636 | continue; | |
637 | ||
638 | dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); | |
639 | ||
640 | token = match_token(p, nfs_mount_option_tokens, args); | |
641 | switch (token) { | |
642 | case Opt_soft: | |
643 | mnt->flags |= NFS_MOUNT_SOFT; | |
644 | break; | |
645 | case Opt_hard: | |
646 | mnt->flags &= ~NFS_MOUNT_SOFT; | |
647 | break; | |
648 | case Opt_intr: | |
649 | mnt->flags |= NFS_MOUNT_INTR; | |
650 | break; | |
651 | case Opt_nointr: | |
652 | mnt->flags &= ~NFS_MOUNT_INTR; | |
653 | break; | |
654 | case Opt_posix: | |
655 | mnt->flags |= NFS_MOUNT_POSIX; | |
656 | break; | |
657 | case Opt_noposix: | |
658 | mnt->flags &= ~NFS_MOUNT_POSIX; | |
659 | break; | |
660 | case Opt_cto: | |
661 | mnt->flags &= ~NFS_MOUNT_NOCTO; | |
662 | break; | |
663 | case Opt_nocto: | |
664 | mnt->flags |= NFS_MOUNT_NOCTO; | |
665 | break; | |
666 | case Opt_ac: | |
667 | mnt->flags &= ~NFS_MOUNT_NOAC; | |
668 | break; | |
669 | case Opt_noac: | |
670 | mnt->flags |= NFS_MOUNT_NOAC; | |
671 | break; | |
672 | case Opt_lock: | |
673 | mnt->flags &= ~NFS_MOUNT_NONLM; | |
674 | break; | |
675 | case Opt_nolock: | |
676 | mnt->flags |= NFS_MOUNT_NONLM; | |
677 | break; | |
678 | case Opt_v2: | |
679 | mnt->flags &= ~NFS_MOUNT_VER3; | |
680 | break; | |
681 | case Opt_v3: | |
682 | mnt->flags |= NFS_MOUNT_VER3; | |
683 | break; | |
684 | case Opt_udp: | |
685 | mnt->flags &= ~NFS_MOUNT_TCP; | |
0896a725 | 686 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 CL |
687 | mnt->timeo = 7; |
688 | mnt->retrans = 5; | |
689 | break; | |
690 | case Opt_tcp: | |
691 | mnt->flags |= NFS_MOUNT_TCP; | |
0896a725 | 692 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 CL |
693 | mnt->timeo = 600; |
694 | mnt->retrans = 2; | |
695 | break; | |
2cf7ff7a TT |
696 | case Opt_rdma: |
697 | mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ | |
698 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
699 | mnt->timeo = 600; | |
700 | mnt->retrans = 2; | |
701 | break; | |
bf0fd768 CL |
702 | case Opt_acl: |
703 | mnt->flags &= ~NFS_MOUNT_NOACL; | |
704 | break; | |
705 | case Opt_noacl: | |
706 | mnt->flags |= NFS_MOUNT_NOACL; | |
707 | break; | |
708 | case Opt_rdirplus: | |
709 | mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; | |
710 | break; | |
711 | case Opt_nordirplus: | |
712 | mnt->flags |= NFS_MOUNT_NORDIRPLUS; | |
713 | break; | |
75180df2 TM |
714 | case Opt_sharecache: |
715 | mnt->flags &= ~NFS_MOUNT_UNSHARED; | |
716 | break; | |
717 | case Opt_nosharecache: | |
718 | mnt->flags |= NFS_MOUNT_UNSHARED; | |
719 | break; | |
bf0fd768 CL |
720 | |
721 | case Opt_port: | |
722 | if (match_int(args, &option)) | |
723 | return 0; | |
724 | if (option < 0 || option > 65535) | |
725 | return 0; | |
41089644 | 726 | mnt->nfs_server.address.sin_port = htons(option); |
bf0fd768 CL |
727 | break; |
728 | case Opt_rsize: | |
729 | if (match_int(args, &mnt->rsize)) | |
730 | return 0; | |
731 | break; | |
732 | case Opt_wsize: | |
733 | if (match_int(args, &mnt->wsize)) | |
734 | return 0; | |
735 | break; | |
736 | case Opt_bsize: | |
737 | if (match_int(args, &option)) | |
738 | return 0; | |
739 | if (option < 0) | |
740 | return 0; | |
741 | mnt->bsize = option; | |
742 | break; | |
743 | case Opt_timeo: | |
744 | if (match_int(args, &mnt->timeo)) | |
745 | return 0; | |
746 | break; | |
747 | case Opt_retrans: | |
748 | if (match_int(args, &mnt->retrans)) | |
749 | return 0; | |
750 | break; | |
751 | case Opt_acregmin: | |
752 | if (match_int(args, &mnt->acregmin)) | |
753 | return 0; | |
754 | break; | |
755 | case Opt_acregmax: | |
756 | if (match_int(args, &mnt->acregmax)) | |
757 | return 0; | |
758 | break; | |
759 | case Opt_acdirmin: | |
760 | if (match_int(args, &mnt->acdirmin)) | |
761 | return 0; | |
762 | break; | |
763 | case Opt_acdirmax: | |
764 | if (match_int(args, &mnt->acdirmax)) | |
765 | return 0; | |
766 | break; | |
767 | case Opt_actimeo: | |
768 | if (match_int(args, &option)) | |
769 | return 0; | |
770 | if (option < 0) | |
771 | return 0; | |
772 | mnt->acregmin = | |
773 | mnt->acregmax = | |
774 | mnt->acdirmin = | |
775 | mnt->acdirmax = option; | |
776 | break; | |
777 | case Opt_namelen: | |
778 | if (match_int(args, &mnt->namlen)) | |
779 | return 0; | |
780 | break; | |
781 | case Opt_mountport: | |
782 | if (match_int(args, &option)) | |
783 | return 0; | |
784 | if (option < 0 || option > 65535) | |
785 | return 0; | |
786 | mnt->mount_server.port = option; | |
787 | break; | |
bf0fd768 CL |
788 | case Opt_mountvers: |
789 | if (match_int(args, &option)) | |
790 | return 0; | |
791 | if (option < 0) | |
792 | return 0; | |
793 | mnt->mount_server.version = option; | |
794 | break; | |
bf0fd768 CL |
795 | case Opt_nfsvers: |
796 | if (match_int(args, &option)) | |
797 | return 0; | |
798 | switch (option) { | |
799 | case 2: | |
800 | mnt->flags &= ~NFS_MOUNT_VER3; | |
801 | break; | |
802 | case 3: | |
803 | mnt->flags |= NFS_MOUNT_VER3; | |
804 | break; | |
805 | default: | |
806 | goto out_unrec_vers; | |
807 | } | |
808 | break; | |
809 | ||
810 | case Opt_sec: | |
811 | string = match_strdup(args); | |
812 | if (string == NULL) | |
813 | goto out_nomem; | |
814 | token = match_token(string, nfs_secflavor_tokens, args); | |
815 | kfree(string); | |
816 | ||
817 | /* | |
818 | * The flags setting is for v2/v3. The flavor_len | |
819 | * setting is for v4. v2/v3 also need to know the | |
820 | * difference between NULL and UNIX. | |
821 | */ | |
822 | switch (token) { | |
823 | case Opt_sec_none: | |
824 | mnt->flags &= ~NFS_MOUNT_SECFLAVOUR; | |
825 | mnt->auth_flavor_len = 0; | |
826 | mnt->auth_flavors[0] = RPC_AUTH_NULL; | |
827 | break; | |
828 | case Opt_sec_sys: | |
829 | mnt->flags &= ~NFS_MOUNT_SECFLAVOUR; | |
830 | mnt->auth_flavor_len = 0; | |
831 | mnt->auth_flavors[0] = RPC_AUTH_UNIX; | |
832 | break; | |
833 | case Opt_sec_krb5: | |
834 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
835 | mnt->auth_flavor_len = 1; | |
836 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5; | |
837 | break; | |
838 | case Opt_sec_krb5i: | |
839 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
840 | mnt->auth_flavor_len = 1; | |
841 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I; | |
842 | break; | |
843 | case Opt_sec_krb5p: | |
844 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
845 | mnt->auth_flavor_len = 1; | |
846 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P; | |
847 | break; | |
848 | case Opt_sec_lkey: | |
849 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
850 | mnt->auth_flavor_len = 1; | |
851 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY; | |
852 | break; | |
853 | case Opt_sec_lkeyi: | |
854 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
855 | mnt->auth_flavor_len = 1; | |
856 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI; | |
857 | break; | |
858 | case Opt_sec_lkeyp: | |
859 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
860 | mnt->auth_flavor_len = 1; | |
861 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP; | |
862 | break; | |
863 | case Opt_sec_spkm: | |
864 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
865 | mnt->auth_flavor_len = 1; | |
866 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM; | |
867 | break; | |
868 | case Opt_sec_spkmi: | |
869 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
870 | mnt->auth_flavor_len = 1; | |
871 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI; | |
872 | break; | |
873 | case Opt_sec_spkmp: | |
874 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
875 | mnt->auth_flavor_len = 1; | |
876 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP; | |
877 | break; | |
878 | default: | |
879 | goto out_unrec_sec; | |
880 | } | |
881 | break; | |
882 | case Opt_proto: | |
883 | string = match_strdup(args); | |
884 | if (string == NULL) | |
885 | goto out_nomem; | |
886 | token = match_token(string, | |
887 | nfs_xprt_protocol_tokens, args); | |
888 | kfree(string); | |
889 | ||
890 | switch (token) { | |
fdb66ff4 | 891 | case Opt_xprt_udp: |
bf0fd768 | 892 | mnt->flags &= ~NFS_MOUNT_TCP; |
0896a725 | 893 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 CL |
894 | mnt->timeo = 7; |
895 | mnt->retrans = 5; | |
896 | break; | |
fdb66ff4 | 897 | case Opt_xprt_tcp: |
bf0fd768 | 898 | mnt->flags |= NFS_MOUNT_TCP; |
0896a725 | 899 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 CL |
900 | mnt->timeo = 600; |
901 | mnt->retrans = 2; | |
902 | break; | |
2cf7ff7a TT |
903 | case Opt_xprt_rdma: |
904 | /* vector side protocols to TCP */ | |
905 | mnt->flags |= NFS_MOUNT_TCP; | |
906 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
907 | mnt->timeo = 600; | |
908 | mnt->retrans = 2; | |
909 | break; | |
bf0fd768 CL |
910 | default: |
911 | goto out_unrec_xprt; | |
912 | } | |
913 | break; | |
914 | case Opt_mountproto: | |
915 | string = match_strdup(args); | |
916 | if (string == NULL) | |
917 | goto out_nomem; | |
918 | token = match_token(string, | |
919 | nfs_xprt_protocol_tokens, args); | |
920 | kfree(string); | |
921 | ||
922 | switch (token) { | |
fdb66ff4 | 923 | case Opt_xprt_udp: |
0896a725 | 924 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 | 925 | break; |
fdb66ff4 | 926 | case Opt_xprt_tcp: |
0896a725 | 927 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 928 | break; |
2cf7ff7a | 929 | case Opt_xprt_rdma: /* not used for side protocols */ |
bf0fd768 CL |
930 | default: |
931 | goto out_unrec_xprt; | |
932 | } | |
933 | break; | |
934 | case Opt_addr: | |
935 | string = match_strdup(args); | |
936 | if (string == NULL) | |
937 | goto out_nomem; | |
938 | mnt->nfs_server.address.sin_family = AF_INET; | |
939 | mnt->nfs_server.address.sin_addr.s_addr = | |
940 | in_aton(string); | |
941 | kfree(string); | |
942 | break; | |
943 | case Opt_clientaddr: | |
944 | string = match_strdup(args); | |
945 | if (string == NULL) | |
946 | goto out_nomem; | |
947 | mnt->client_address = string; | |
948 | break; | |
0ac83779 | 949 | case Opt_mountaddr: |
bf0fd768 CL |
950 | string = match_strdup(args); |
951 | if (string == NULL) | |
952 | goto out_nomem; | |
953 | mnt->mount_server.address.sin_family = AF_INET; | |
954 | mnt->mount_server.address.sin_addr.s_addr = | |
955 | in_aton(string); | |
956 | kfree(string); | |
957 | break; | |
958 | ||
959 | case Opt_userspace: | |
960 | case Opt_deprecated: | |
961 | break; | |
962 | ||
963 | default: | |
964 | goto out_unknown; | |
965 | } | |
966 | } | |
967 | ||
968 | return 1; | |
969 | ||
970 | out_nomem: | |
971 | printk(KERN_INFO "NFS: not enough memory to parse option\n"); | |
972 | return 0; | |
973 | ||
974 | out_unrec_vers: | |
975 | printk(KERN_INFO "NFS: unrecognized NFS version number\n"); | |
976 | return 0; | |
977 | ||
978 | out_unrec_xprt: | |
979 | printk(KERN_INFO "NFS: unrecognized transport protocol\n"); | |
980 | return 0; | |
981 | ||
982 | out_unrec_sec: | |
983 | printk(KERN_INFO "NFS: unrecognized security flavor\n"); | |
984 | return 0; | |
985 | ||
986 | out_unknown: | |
987 | printk(KERN_INFO "NFS: unknown mount option: %s\n", p); | |
988 | return 0; | |
989 | } | |
990 | ||
0076d7b7 CL |
991 | /* |
992 | * Use the remote server's MOUNT service to request the NFS file handle | |
993 | * corresponding to the provided path. | |
994 | */ | |
995 | static int nfs_try_mount(struct nfs_parsed_mount_data *args, | |
996 | struct nfs_fh *root_fh) | |
997 | { | |
998 | struct sockaddr_in sin; | |
999 | int status; | |
1000 | ||
1001 | if (args->mount_server.version == 0) { | |
1002 | if (args->flags & NFS_MOUNT_VER3) | |
1003 | args->mount_server.version = NFS_MNT3_VERSION; | |
1004 | else | |
1005 | args->mount_server.version = NFS_MNT_VERSION; | |
1006 | } | |
1007 | ||
1008 | /* | |
1009 | * Construct the mount server's address. | |
1010 | */ | |
1011 | if (args->mount_server.address.sin_addr.s_addr != INADDR_ANY) | |
1012 | sin = args->mount_server.address; | |
1013 | else | |
1014 | sin = args->nfs_server.address; | |
aad70007 JL |
1015 | /* |
1016 | * autobind will be used if mount_server.port == 0 | |
1017 | */ | |
1018 | sin.sin_port = htons(args->mount_server.port); | |
0076d7b7 CL |
1019 | |
1020 | /* | |
1021 | * Now ask the mount server to map our export path | |
1022 | * to a file handle. | |
1023 | */ | |
1024 | status = nfs_mount((struct sockaddr *) &sin, | |
1025 | sizeof(sin), | |
1026 | args->nfs_server.hostname, | |
1027 | args->nfs_server.export_path, | |
1028 | args->mount_server.version, | |
1029 | args->mount_server.protocol, | |
1030 | root_fh); | |
efd8340b CL |
1031 | if (status == 0) |
1032 | return 0; | |
0076d7b7 | 1033 | |
efd8340b CL |
1034 | dfprintk(MOUNT, "NFS: unable to mount server " NIPQUAD_FMT |
1035 | ", error %d\n", NIPQUAD(sin.sin_addr.s_addr), status); | |
0076d7b7 CL |
1036 | return status; |
1037 | } | |
1038 | ||
f7b422b1 | 1039 | /* |
54ceac45 DH |
1040 | * Validate the NFS2/NFS3 mount data |
1041 | * - fills in the mount root filehandle | |
136d558c CL |
1042 | * |
1043 | * For option strings, user space handles the following behaviors: | |
1044 | * | |
1045 | * + DNS: mapping server host name to IP address ("addr=" option) | |
1046 | * | |
1047 | * + failure mode: how to behave if a mount request can't be handled | |
1048 | * immediately ("fg/bg" option) | |
1049 | * | |
1050 | * + retry: how often to retry a mount request ("retry=" option) | |
1051 | * | |
1052 | * + breaking back: trying proto=udp after proto=tcp, v2 after v3, | |
1053 | * mountproto=tcp after mountproto=udp, and so on | |
f7b422b1 | 1054 | */ |
2283f8d6 TT |
1055 | static int nfs_validate_mount_data(void *options, |
1056 | struct nfs_parsed_mount_data *args, | |
136d558c CL |
1057 | struct nfs_fh *mntfh, |
1058 | const char *dev_name) | |
f7b422b1 | 1059 | { |
2283f8d6 | 1060 | struct nfs_mount_data *data = (struct nfs_mount_data *)options; |
136d558c | 1061 | |
f16c9603 RK |
1062 | memset(args, 0, sizeof(*args)); |
1063 | ||
5df36e78 CL |
1064 | if (data == NULL) |
1065 | goto out_no_data; | |
f7b422b1 | 1066 | |
2283f8d6 TT |
1067 | args->flags = (NFS_MOUNT_VER3 | NFS_MOUNT_TCP); |
1068 | args->rsize = NFS_MAX_FILE_IO_SIZE; | |
1069 | args->wsize = NFS_MAX_FILE_IO_SIZE; | |
1070 | args->timeo = 600; | |
1071 | args->retrans = 2; | |
1072 | args->acregmin = 3; | |
1073 | args->acregmax = 60; | |
1074 | args->acdirmin = 30; | |
1075 | args->acdirmax = 60; | |
0896a725 | 1076 | args->mount_server.protocol = XPRT_TRANSPORT_UDP; |
0896a725 | 1077 | args->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
2283f8d6 | 1078 | |
54ceac45 | 1079 | switch (data->version) { |
5df36e78 CL |
1080 | case 1: |
1081 | data->namlen = 0; | |
1082 | case 2: | |
1083 | data->bsize = 0; | |
1084 | case 3: | |
1085 | if (data->flags & NFS_MOUNT_VER3) | |
1086 | goto out_no_v3; | |
1087 | data->root.size = NFS2_FHSIZE; | |
1088 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
1089 | case 4: | |
1090 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1091 | goto out_no_sec; | |
1092 | case 5: | |
1093 | memset(data->context, 0, sizeof(data->context)); | |
1094 | case 6: | |
1095 | if (data->flags & NFS_MOUNT_VER3) | |
1096 | mntfh->size = data->root.size; | |
1097 | else | |
1098 | mntfh->size = NFS2_FHSIZE; | |
1099 | ||
1100 | if (mntfh->size > sizeof(mntfh->data)) | |
1101 | goto out_invalid_fh; | |
1102 | ||
1103 | memcpy(mntfh->data, data->root.data, mntfh->size); | |
1104 | if (mntfh->size < sizeof(mntfh->data)) | |
1105 | memset(mntfh->data + mntfh->size, 0, | |
1106 | sizeof(mntfh->data) - mntfh->size); | |
6e88e061 CL |
1107 | |
1108 | if (!nfs_verify_server_address((struct sockaddr *) &data->addr)) | |
1109 | goto out_no_address; | |
1110 | ||
2283f8d6 TT |
1111 | /* |
1112 | * Translate to nfs_parsed_mount_data, which nfs_fill_super | |
1113 | * can deal with. | |
1114 | */ | |
1115 | args->flags = data->flags; | |
1116 | args->rsize = data->rsize; | |
1117 | args->wsize = data->wsize; | |
1118 | args->flags = data->flags; | |
1119 | args->timeo = data->timeo; | |
1120 | args->retrans = data->retrans; | |
1121 | args->acregmin = data->acregmin; | |
1122 | args->acregmax = data->acregmax; | |
1123 | args->acdirmin = data->acdirmin; | |
1124 | args->acdirmax = data->acdirmax; | |
1125 | args->nfs_server.address = data->addr; | |
1126 | if (!(data->flags & NFS_MOUNT_TCP)) | |
0896a725 | 1127 | args->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
2283f8d6 TT |
1128 | /* N.B. caller will free nfs_server.hostname in all cases */ |
1129 | args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); | |
1130 | args->namlen = data->namlen; | |
1131 | args->bsize = data->bsize; | |
1132 | args->auth_flavors[0] = data->pseudoflavor; | |
5df36e78 | 1133 | break; |
136d558c CL |
1134 | default: { |
1135 | unsigned int len; | |
1136 | char *c; | |
1137 | int status; | |
136d558c | 1138 | |
2283f8d6 TT |
1139 | if (nfs_parse_mount_options((char *)options, args) == 0) |
1140 | return -EINVAL; | |
136d558c | 1141 | |
6e88e061 CL |
1142 | if (!nfs_verify_server_address((struct sockaddr *) |
1143 | &args->nfs_server.address)) | |
1144 | goto out_no_address; | |
1145 | ||
136d558c CL |
1146 | c = strchr(dev_name, ':'); |
1147 | if (c == NULL) | |
1148 | return -EINVAL; | |
350c73af | 1149 | len = c - dev_name; |
2283f8d6 TT |
1150 | /* N.B. caller will free nfs_server.hostname in all cases */ |
1151 | args->nfs_server.hostname = kstrndup(dev_name, len, GFP_KERNEL); | |
136d558c CL |
1152 | |
1153 | c++; | |
1154 | if (strlen(c) > NFS_MAXPATHLEN) | |
7d1cca72 | 1155 | return -ENAMETOOLONG; |
2283f8d6 | 1156 | args->nfs_server.export_path = c; |
136d558c | 1157 | |
2283f8d6 | 1158 | status = nfs_try_mount(args, mntfh); |
136d558c | 1159 | if (status) |
fdc6e2c8 | 1160 | return status; |
136d558c | 1161 | |
136d558c CL |
1162 | break; |
1163 | } | |
f7b422b1 | 1164 | } |
54ceac45 | 1165 | |
2283f8d6 TT |
1166 | if (!(args->flags & NFS_MOUNT_SECFLAVOUR)) |
1167 | args->auth_flavors[0] = RPC_AUTH_UNIX; | |
36b15c54 | 1168 | |
54ceac45 | 1169 | #ifndef CONFIG_NFS_V3 |
2283f8d6 | 1170 | if (args->flags & NFS_MOUNT_VER3) |
5df36e78 CL |
1171 | goto out_v3_not_compiled; |
1172 | #endif /* !CONFIG_NFS_V3 */ | |
f7b422b1 | 1173 | |
5df36e78 | 1174 | return 0; |
f7b422b1 | 1175 | |
5df36e78 CL |
1176 | out_no_data: |
1177 | dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); | |
1178 | return -EINVAL; | |
54ceac45 | 1179 | |
5df36e78 CL |
1180 | out_no_v3: |
1181 | dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", | |
1182 | data->version); | |
1183 | return -EINVAL; | |
f7b422b1 | 1184 | |
5df36e78 CL |
1185 | out_no_sec: |
1186 | dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); | |
1187 | return -EINVAL; | |
1188 | ||
5df36e78 CL |
1189 | #ifndef CONFIG_NFS_V3 |
1190 | out_v3_not_compiled: | |
1191 | dfprintk(MOUNT, "NFS: NFSv3 is not compiled into kernel\n"); | |
1192 | return -EPROTONOSUPPORT; | |
1193 | #endif /* !CONFIG_NFS_V3 */ | |
1194 | ||
1195 | out_no_address: | |
1196 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); | |
1197 | return -EINVAL; | |
1198 | ||
1199 | out_invalid_fh: | |
1200 | dfprintk(MOUNT, "NFS: invalid root filehandle\n"); | |
1201 | return -EINVAL; | |
f7b422b1 DH |
1202 | } |
1203 | ||
f7b422b1 | 1204 | /* |
54ceac45 | 1205 | * Initialise the common bits of the superblock |
f7b422b1 | 1206 | */ |
54ceac45 | 1207 | static inline void nfs_initialise_sb(struct super_block *sb) |
f7b422b1 | 1208 | { |
54ceac45 | 1209 | struct nfs_server *server = NFS_SB(sb); |
5006a76c | 1210 | |
54ceac45 | 1211 | sb->s_magic = NFS_SUPER_MAGIC; |
f7b422b1 | 1212 | |
54ceac45 DH |
1213 | /* We probably want something more informative here */ |
1214 | snprintf(sb->s_id, sizeof(sb->s_id), | |
1215 | "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev)); | |
5006a76c | 1216 | |
54ceac45 DH |
1217 | if (sb->s_blocksize == 0) |
1218 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
1219 | &sb->s_blocksize_bits); | |
f7b422b1 | 1220 | |
54ceac45 DH |
1221 | if (server->flags & NFS_MOUNT_NOAC) |
1222 | sb->s_flags |= MS_SYNCHRONOUS; | |
f7b422b1 | 1223 | |
54ceac45 | 1224 | nfs_super_set_maxbytes(sb, server->maxfilesize); |
f7b422b1 DH |
1225 | } |
1226 | ||
1227 | /* | |
54ceac45 | 1228 | * Finish setting up an NFS2/3 superblock |
f7b422b1 | 1229 | */ |
2283f8d6 TT |
1230 | static void nfs_fill_super(struct super_block *sb, |
1231 | struct nfs_parsed_mount_data *data) | |
f7b422b1 DH |
1232 | { |
1233 | struct nfs_server *server = NFS_SB(sb); | |
5006a76c | 1234 | |
54ceac45 DH |
1235 | sb->s_blocksize_bits = 0; |
1236 | sb->s_blocksize = 0; | |
1237 | if (data->bsize) | |
1238 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); | |
f7b422b1 | 1239 | |
54ceac45 DH |
1240 | if (server->flags & NFS_MOUNT_VER3) { |
1241 | /* The VFS shouldn't apply the umask to mode bits. We will do | |
1242 | * so ourselves when necessary. | |
1243 | */ | |
1244 | sb->s_flags |= MS_POSIXACL; | |
1245 | sb->s_time_gran = 1; | |
816724e6 | 1246 | } |
54ceac45 DH |
1247 | |
1248 | sb->s_op = &nfs_sops; | |
1249 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1250 | } |
1251 | ||
1252 | /* | |
54ceac45 | 1253 | * Finish setting up a cloned NFS2/3 superblock |
f7b422b1 | 1254 | */ |
54ceac45 DH |
1255 | static void nfs_clone_super(struct super_block *sb, |
1256 | const struct super_block *old_sb) | |
f7b422b1 | 1257 | { |
54ceac45 DH |
1258 | struct nfs_server *server = NFS_SB(sb); |
1259 | ||
1260 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; | |
1261 | sb->s_blocksize = old_sb->s_blocksize; | |
1262 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 1263 | |
f7b422b1 | 1264 | if (server->flags & NFS_MOUNT_VER3) { |
54ceac45 DH |
1265 | /* The VFS shouldn't apply the umask to mode bits. We will do |
1266 | * so ourselves when necessary. | |
f7b422b1 DH |
1267 | */ |
1268 | sb->s_flags |= MS_POSIXACL; | |
f7b422b1 | 1269 | sb->s_time_gran = 1; |
f7b422b1 DH |
1270 | } |
1271 | ||
54ceac45 DH |
1272 | sb->s_op = old_sb->s_op; |
1273 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1274 | } |
1275 | ||
275a5d24 TM |
1276 | #define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS) |
1277 | ||
1278 | static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags) | |
1279 | { | |
1280 | const struct nfs_server *a = s->s_fs_info; | |
1281 | const struct rpc_clnt *clnt_a = a->client; | |
1282 | const struct rpc_clnt *clnt_b = b->client; | |
1283 | ||
1284 | if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK)) | |
1285 | goto Ebusy; | |
1286 | if (a->nfs_client != b->nfs_client) | |
1287 | goto Ebusy; | |
1288 | if (a->flags != b->flags) | |
1289 | goto Ebusy; | |
1290 | if (a->wsize != b->wsize) | |
1291 | goto Ebusy; | |
1292 | if (a->rsize != b->rsize) | |
1293 | goto Ebusy; | |
1294 | if (a->acregmin != b->acregmin) | |
1295 | goto Ebusy; | |
1296 | if (a->acregmax != b->acregmax) | |
1297 | goto Ebusy; | |
1298 | if (a->acdirmin != b->acdirmin) | |
1299 | goto Ebusy; | |
1300 | if (a->acdirmax != b->acdirmax) | |
1301 | goto Ebusy; | |
1302 | if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) | |
1303 | goto Ebusy; | |
e89a5a43 | 1304 | return 1; |
275a5d24 | 1305 | Ebusy: |
e89a5a43 TM |
1306 | return 0; |
1307 | } | |
1308 | ||
1309 | struct nfs_sb_mountdata { | |
1310 | struct nfs_server *server; | |
1311 | int mntflags; | |
1312 | }; | |
1313 | ||
1314 | static int nfs_set_super(struct super_block *s, void *data) | |
1315 | { | |
1316 | struct nfs_sb_mountdata *sb_mntdata = data; | |
1317 | struct nfs_server *server = sb_mntdata->server; | |
1318 | int ret; | |
1319 | ||
1320 | s->s_flags = sb_mntdata->mntflags; | |
1321 | s->s_fs_info = server; | |
1322 | ret = set_anon_super(s, server); | |
1323 | if (ret == 0) | |
1324 | server->s_dev = s->s_dev; | |
1325 | return ret; | |
1326 | } | |
1327 | ||
1328 | static int nfs_compare_super(struct super_block *sb, void *data) | |
1329 | { | |
1330 | struct nfs_sb_mountdata *sb_mntdata = data; | |
1331 | struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb); | |
1332 | int mntflags = sb_mntdata->mntflags; | |
1333 | ||
1334 | if (memcmp(&old->nfs_client->cl_addr, | |
1335 | &server->nfs_client->cl_addr, | |
1336 | sizeof(old->nfs_client->cl_addr)) != 0) | |
1337 | return 0; | |
1338 | /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */ | |
1339 | if (old->flags & NFS_MOUNT_UNSHARED) | |
1340 | return 0; | |
1341 | if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0) | |
1342 | return 0; | |
1343 | return nfs_compare_mount_options(sb, server, mntflags); | |
275a5d24 TM |
1344 | } |
1345 | ||
816724e6 TM |
1346 | static int nfs_get_sb(struct file_system_type *fs_type, |
1347 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
f7b422b1 | 1348 | { |
f7b422b1 DH |
1349 | struct nfs_server *server = NULL; |
1350 | struct super_block *s; | |
54ceac45 | 1351 | struct nfs_fh mntfh; |
2283f8d6 | 1352 | struct nfs_parsed_mount_data data; |
54ceac45 | 1353 | struct dentry *mntroot; |
75180df2 | 1354 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1355 | struct nfs_sb_mountdata sb_mntdata = { |
1356 | .mntflags = flags, | |
1357 | }; | |
54ceac45 | 1358 | int error; |
f7b422b1 | 1359 | |
54ceac45 | 1360 | /* Validate the mount data */ |
2283f8d6 | 1361 | error = nfs_validate_mount_data(raw_data, &data, &mntfh, dev_name); |
54ceac45 | 1362 | if (error < 0) |
0655960f | 1363 | goto out; |
f7b422b1 | 1364 | |
54ceac45 | 1365 | /* Get a volume representation */ |
2283f8d6 | 1366 | server = nfs_create_server(&data, &mntfh); |
54ceac45 DH |
1367 | if (IS_ERR(server)) { |
1368 | error = PTR_ERR(server); | |
0655960f | 1369 | goto out; |
f7b422b1 | 1370 | } |
e89a5a43 | 1371 | sb_mntdata.server = server; |
f7b422b1 | 1372 | |
75180df2 TM |
1373 | if (server->flags & NFS_MOUNT_UNSHARED) |
1374 | compare_super = NULL; | |
1375 | ||
54ceac45 | 1376 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1377 | s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
1378 | if (IS_ERR(s)) { |
1379 | error = PTR_ERR(s); | |
54ceac45 | 1380 | goto out_err_nosb; |
816724e6 TM |
1381 | } |
1382 | ||
54ceac45 DH |
1383 | if (s->s_fs_info != server) { |
1384 | nfs_free_server(server); | |
1385 | server = NULL; | |
1386 | } | |
f7b422b1 | 1387 | |
54ceac45 DH |
1388 | if (!s->s_root) { |
1389 | /* initial superblock/root creation */ | |
2283f8d6 | 1390 | nfs_fill_super(s, &data); |
54ceac45 | 1391 | } |
f7b422b1 | 1392 | |
54ceac45 DH |
1393 | mntroot = nfs_get_root(s, &mntfh); |
1394 | if (IS_ERR(mntroot)) { | |
1395 | error = PTR_ERR(mntroot); | |
1396 | goto error_splat_super; | |
f7b422b1 | 1397 | } |
816724e6 | 1398 | |
54ceac45 DH |
1399 | s->s_flags |= MS_ACTIVE; |
1400 | mnt->mnt_sb = s; | |
1401 | mnt->mnt_root = mntroot; | |
0655960f CL |
1402 | error = 0; |
1403 | ||
1404 | out: | |
2283f8d6 | 1405 | kfree(data.nfs_server.hostname); |
0655960f | 1406 | return error; |
816724e6 | 1407 | |
54ceac45 DH |
1408 | out_err_nosb: |
1409 | nfs_free_server(server); | |
0655960f | 1410 | goto out; |
54ceac45 DH |
1411 | |
1412 | error_splat_super: | |
1413 | up_write(&s->s_umount); | |
1414 | deactivate_super(s); | |
0655960f | 1415 | goto out; |
f7b422b1 DH |
1416 | } |
1417 | ||
54ceac45 DH |
1418 | /* |
1419 | * Destroy an NFS2/3 superblock | |
1420 | */ | |
f7b422b1 DH |
1421 | static void nfs_kill_super(struct super_block *s) |
1422 | { | |
1423 | struct nfs_server *server = NFS_SB(s); | |
1424 | ||
1425 | kill_anon_super(s); | |
54ceac45 | 1426 | nfs_free_server(server); |
f7b422b1 DH |
1427 | } |
1428 | ||
54ceac45 DH |
1429 | /* |
1430 | * Clone an NFS2/3 server record on xdev traversal (FSID-change) | |
1431 | */ | |
1432 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags, | |
1433 | const char *dev_name, void *raw_data, | |
1434 | struct vfsmount *mnt) | |
f7b422b1 DH |
1435 | { |
1436 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
1437 | struct super_block *s; |
1438 | struct nfs_server *server; | |
1439 | struct dentry *mntroot; | |
75180df2 | 1440 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1441 | struct nfs_sb_mountdata sb_mntdata = { |
1442 | .mntflags = flags, | |
1443 | }; | |
54ceac45 | 1444 | int error; |
f7b422b1 | 1445 | |
54ceac45 | 1446 | dprintk("--> nfs_xdev_get_sb()\n"); |
f7b422b1 | 1447 | |
54ceac45 DH |
1448 | /* create a new volume representation */ |
1449 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
1450 | if (IS_ERR(server)) { | |
1451 | error = PTR_ERR(server); | |
1452 | goto out_err_noserver; | |
1453 | } | |
e89a5a43 | 1454 | sb_mntdata.server = server; |
8fa5c000 | 1455 | |
75180df2 TM |
1456 | if (server->flags & NFS_MOUNT_UNSHARED) |
1457 | compare_super = NULL; | |
1458 | ||
54ceac45 | 1459 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1460 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
1461 | if (IS_ERR(s)) { |
1462 | error = PTR_ERR(s); | |
1463 | goto out_err_nosb; | |
1464 | } | |
5006a76c | 1465 | |
54ceac45 DH |
1466 | if (s->s_fs_info != server) { |
1467 | nfs_free_server(server); | |
1468 | server = NULL; | |
f7b422b1 | 1469 | } |
24c8dbbb | 1470 | |
54ceac45 DH |
1471 | if (!s->s_root) { |
1472 | /* initial superblock/root creation */ | |
54ceac45 DH |
1473 | nfs_clone_super(s, data->sb); |
1474 | } | |
f7b422b1 | 1475 | |
54ceac45 DH |
1476 | mntroot = nfs_get_root(s, data->fh); |
1477 | if (IS_ERR(mntroot)) { | |
1478 | error = PTR_ERR(mntroot); | |
1479 | goto error_splat_super; | |
f7b422b1 | 1480 | } |
e9cc6c23 | 1481 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
4c1fe2f7 NB |
1482 | dput(mntroot); |
1483 | error = -ESTALE; | |
1484 | goto error_splat_super; | |
1485 | } | |
f7b422b1 | 1486 | |
54ceac45 DH |
1487 | s->s_flags |= MS_ACTIVE; |
1488 | mnt->mnt_sb = s; | |
1489 | mnt->mnt_root = mntroot; | |
f7b422b1 | 1490 | |
54ceac45 DH |
1491 | dprintk("<-- nfs_xdev_get_sb() = 0\n"); |
1492 | return 0; | |
24c8dbbb | 1493 | |
54ceac45 DH |
1494 | out_err_nosb: |
1495 | nfs_free_server(server); | |
1496 | out_err_noserver: | |
1497 | dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error); | |
1498 | return error; | |
f7b422b1 | 1499 | |
54ceac45 DH |
1500 | error_splat_super: |
1501 | up_write(&s->s_umount); | |
1502 | deactivate_super(s); | |
1503 | dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error); | |
1504 | return error; | |
f7b422b1 DH |
1505 | } |
1506 | ||
54ceac45 DH |
1507 | #ifdef CONFIG_NFS_V4 |
1508 | ||
f7b422b1 | 1509 | /* |
54ceac45 | 1510 | * Finish setting up a cloned NFS4 superblock |
f7b422b1 | 1511 | */ |
54ceac45 DH |
1512 | static void nfs4_clone_super(struct super_block *sb, |
1513 | const struct super_block *old_sb) | |
f7b422b1 | 1514 | { |
54ceac45 DH |
1515 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; |
1516 | sb->s_blocksize = old_sb->s_blocksize; | |
1517 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 1518 | sb->s_time_gran = 1; |
54ceac45 DH |
1519 | sb->s_op = old_sb->s_op; |
1520 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1521 | } |
1522 | ||
54ceac45 DH |
1523 | /* |
1524 | * Set up an NFS4 superblock | |
1525 | */ | |
1526 | static void nfs4_fill_super(struct super_block *sb) | |
f7b422b1 | 1527 | { |
54ceac45 DH |
1528 | sb->s_time_gran = 1; |
1529 | sb->s_op = &nfs4_sops; | |
1530 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1531 | } |
1532 | ||
f0768ebd CL |
1533 | /* |
1534 | * Validate NFSv4 mount options | |
1535 | */ | |
91ea40b9 TT |
1536 | static int nfs4_validate_mount_data(void *options, |
1537 | struct nfs_parsed_mount_data *args, | |
1538 | const char *dev_name) | |
f0768ebd | 1539 | { |
91ea40b9 | 1540 | struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; |
f0768ebd CL |
1541 | char *c; |
1542 | ||
f16c9603 RK |
1543 | memset(args, 0, sizeof(*args)); |
1544 | ||
f0768ebd CL |
1545 | if (data == NULL) |
1546 | goto out_no_data; | |
1547 | ||
91ea40b9 TT |
1548 | args->rsize = NFS_MAX_FILE_IO_SIZE; |
1549 | args->wsize = NFS_MAX_FILE_IO_SIZE; | |
1550 | args->timeo = 600; | |
1551 | args->retrans = 2; | |
1552 | args->acregmin = 3; | |
1553 | args->acregmax = 60; | |
1554 | args->acdirmin = 30; | |
1555 | args->acdirmax = 60; | |
0896a725 | 1556 | args->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
91ea40b9 | 1557 | |
f0768ebd CL |
1558 | switch (data->version) { |
1559 | case 1: | |
91ea40b9 | 1560 | if (data->host_addrlen != sizeof(args->nfs_server.address)) |
f0768ebd | 1561 | goto out_no_address; |
91ea40b9 TT |
1562 | if (copy_from_user(&args->nfs_server.address, |
1563 | data->host_addr, | |
20c71f5e | 1564 | sizeof(args->nfs_server.address))) |
f0768ebd | 1565 | return -EFAULT; |
91ea40b9 TT |
1566 | if (args->nfs_server.address.sin_port == 0) |
1567 | args->nfs_server.address.sin_port = htons(NFS_PORT); | |
1568 | if (!nfs_verify_server_address((struct sockaddr *) | |
1569 | &args->nfs_server.address)) | |
f0768ebd CL |
1570 | goto out_no_address; |
1571 | ||
1572 | switch (data->auth_flavourlen) { | |
1573 | case 0: | |
91ea40b9 | 1574 | args->auth_flavors[0] = RPC_AUTH_UNIX; |
f0768ebd CL |
1575 | break; |
1576 | case 1: | |
20c71f5e | 1577 | if (copy_from_user(&args->auth_flavors[0], |
91ea40b9 | 1578 | data->auth_flavours, |
20c71f5e | 1579 | sizeof(args->auth_flavors[0]))) |
f0768ebd CL |
1580 | return -EFAULT; |
1581 | break; | |
1582 | default: | |
1583 | goto out_inval_auth; | |
1584 | } | |
1585 | ||
1586 | c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); | |
1587 | if (IS_ERR(c)) | |
1588 | return PTR_ERR(c); | |
91ea40b9 | 1589 | args->nfs_server.hostname = c; |
f0768ebd CL |
1590 | |
1591 | c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); | |
1592 | if (IS_ERR(c)) | |
1593 | return PTR_ERR(c); | |
91ea40b9 TT |
1594 | args->nfs_server.export_path = c; |
1595 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); | |
f0768ebd CL |
1596 | |
1597 | c = strndup_user(data->client_addr.data, 16); | |
1598 | if (IS_ERR(c)) | |
1599 | return PTR_ERR(c); | |
91ea40b9 TT |
1600 | args->client_address = c; |
1601 | ||
1602 | /* | |
1603 | * Translate to nfs_parsed_mount_data, which nfs4_fill_super | |
1604 | * can deal with. | |
1605 | */ | |
1606 | ||
1607 | args->flags = data->flags & NFS4_MOUNT_FLAGMASK; | |
1608 | args->rsize = data->rsize; | |
1609 | args->wsize = data->wsize; | |
1610 | args->timeo = data->timeo; | |
1611 | args->retrans = data->retrans; | |
1612 | args->acregmin = data->acregmin; | |
1613 | args->acregmax = data->acregmax; | |
1614 | args->acdirmin = data->acdirmin; | |
1615 | args->acdirmax = data->acdirmax; | |
1616 | args->nfs_server.protocol = data->proto; | |
f0768ebd CL |
1617 | |
1618 | break; | |
80071225 CL |
1619 | default: { |
1620 | unsigned int len; | |
91ea40b9 TT |
1621 | |
1622 | if (nfs_parse_mount_options((char *)options, args) == 0) | |
80071225 CL |
1623 | return -EINVAL; |
1624 | ||
0eb25741 CL |
1625 | if (args->nfs_server.address.sin_port == 0) |
1626 | args->nfs_server.address.sin_port = htons(NFS_PORT); | |
80071225 | 1627 | if (!nfs_verify_server_address((struct sockaddr *) |
91ea40b9 | 1628 | &args->nfs_server.address)) |
80071225 | 1629 | return -EINVAL; |
80071225 | 1630 | |
91ea40b9 | 1631 | switch (args->auth_flavor_len) { |
80071225 | 1632 | case 0: |
91ea40b9 | 1633 | args->auth_flavors[0] = RPC_AUTH_UNIX; |
80071225 CL |
1634 | break; |
1635 | case 1: | |
80071225 CL |
1636 | break; |
1637 | default: | |
1638 | goto out_inval_auth; | |
1639 | } | |
1640 | ||
80071225 CL |
1641 | /* |
1642 | * Split "dev_name" into "hostname:mntpath". | |
1643 | */ | |
1644 | c = strchr(dev_name, ':'); | |
1645 | if (c == NULL) | |
1646 | return -EINVAL; | |
1647 | /* while calculating len, pretend ':' is '\0' */ | |
1648 | len = c - dev_name; | |
1649 | if (len > NFS4_MAXNAMLEN) | |
7d1cca72 | 1650 | return -ENAMETOOLONG; |
6a0ed1de CL |
1651 | /* N.B. caller will free nfs_server.hostname in all cases */ |
1652 | args->nfs_server.hostname = kstrndup(dev_name, len, GFP_KERNEL); | |
80071225 CL |
1653 | |
1654 | c++; /* step over the ':' */ | |
1655 | len = strlen(c); | |
1656 | if (len > NFS4_MAXPATHLEN) | |
7d1cca72 | 1657 | return -ENAMETOOLONG; |
6a0ed1de | 1658 | args->nfs_server.export_path = kstrndup(c, len, GFP_KERNEL); |
80071225 | 1659 | |
6a0ed1de | 1660 | dprintk("NFS: MNTPATH: '%s'\n", args->nfs_server.export_path); |
80071225 | 1661 | |
91ea40b9 | 1662 | if (args->client_address == NULL) |
0a87cf12 JL |
1663 | goto out_no_client_address; |
1664 | ||
80071225 CL |
1665 | break; |
1666 | } | |
f0768ebd CL |
1667 | } |
1668 | ||
1669 | return 0; | |
1670 | ||
1671 | out_no_data: | |
1672 | dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); | |
1673 | return -EINVAL; | |
1674 | ||
1675 | out_inval_auth: | |
1676 | dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", | |
1677 | data->auth_flavourlen); | |
1678 | return -EINVAL; | |
1679 | ||
1680 | out_no_address: | |
1681 | dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); | |
1682 | return -EINVAL; | |
0a87cf12 JL |
1683 | |
1684 | out_no_client_address: | |
1685 | dfprintk(MOUNT, "NFS4: mount program didn't pass callback address\n"); | |
1686 | return -EINVAL; | |
f0768ebd CL |
1687 | } |
1688 | ||
54ceac45 DH |
1689 | /* |
1690 | * Get the superblock for an NFS4 mountpoint | |
1691 | */ | |
816724e6 TM |
1692 | static int nfs4_get_sb(struct file_system_type *fs_type, |
1693 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
f7b422b1 | 1694 | { |
91ea40b9 | 1695 | struct nfs_parsed_mount_data data; |
54ceac45 DH |
1696 | struct super_block *s; |
1697 | struct nfs_server *server; | |
54ceac45 DH |
1698 | struct nfs_fh mntfh; |
1699 | struct dentry *mntroot; | |
75180df2 | 1700 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1701 | struct nfs_sb_mountdata sb_mntdata = { |
1702 | .mntflags = flags, | |
1703 | }; | |
54ceac45 | 1704 | int error; |
f7b422b1 | 1705 | |
f0768ebd | 1706 | /* Validate the mount data */ |
91ea40b9 | 1707 | error = nfs4_validate_mount_data(raw_data, &data, dev_name); |
f0768ebd CL |
1708 | if (error < 0) |
1709 | goto out; | |
f7b422b1 | 1710 | |
54ceac45 | 1711 | /* Get a volume representation */ |
91ea40b9 | 1712 | server = nfs4_create_server(&data, &mntfh); |
54ceac45 DH |
1713 | if (IS_ERR(server)) { |
1714 | error = PTR_ERR(server); | |
29eb981a | 1715 | goto out; |
f7b422b1 | 1716 | } |
e89a5a43 | 1717 | sb_mntdata.server = server; |
f7b422b1 | 1718 | |
75180df2 TM |
1719 | if (server->flags & NFS4_MOUNT_UNSHARED) |
1720 | compare_super = NULL; | |
1721 | ||
54ceac45 | 1722 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1723 | s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
1724 | if (IS_ERR(s)) { |
1725 | error = PTR_ERR(s); | |
f7b422b1 | 1726 | goto out_free; |
816724e6 TM |
1727 | } |
1728 | ||
5dd3177a TM |
1729 | if (s->s_fs_info != server) { |
1730 | nfs_free_server(server); | |
1731 | server = NULL; | |
1732 | } | |
1733 | ||
54ceac45 DH |
1734 | if (!s->s_root) { |
1735 | /* initial superblock/root creation */ | |
54ceac45 | 1736 | nfs4_fill_super(s); |
54ceac45 | 1737 | } |
f7b422b1 | 1738 | |
54ceac45 DH |
1739 | mntroot = nfs4_get_root(s, &mntfh); |
1740 | if (IS_ERR(mntroot)) { | |
1741 | error = PTR_ERR(mntroot); | |
1742 | goto error_splat_super; | |
f7b422b1 | 1743 | } |
54ceac45 | 1744 | |
f7b422b1 | 1745 | s->s_flags |= MS_ACTIVE; |
54ceac45 DH |
1746 | mnt->mnt_sb = s; |
1747 | mnt->mnt_root = mntroot; | |
29eb981a CL |
1748 | error = 0; |
1749 | ||
1750 | out: | |
91ea40b9 TT |
1751 | kfree(data.client_address); |
1752 | kfree(data.nfs_server.export_path); | |
1753 | kfree(data.nfs_server.hostname); | |
29eb981a | 1754 | return error; |
54ceac45 | 1755 | |
f7b422b1 | 1756 | out_free: |
54ceac45 | 1757 | nfs_free_server(server); |
29eb981a | 1758 | goto out; |
54ceac45 DH |
1759 | |
1760 | error_splat_super: | |
1761 | up_write(&s->s_umount); | |
1762 | deactivate_super(s); | |
29eb981a | 1763 | goto out; |
f7b422b1 DH |
1764 | } |
1765 | ||
1766 | static void nfs4_kill_super(struct super_block *sb) | |
1767 | { | |
1768 | struct nfs_server *server = NFS_SB(sb); | |
1769 | ||
1770 | nfs_return_all_delegations(sb); | |
1771 | kill_anon_super(sb); | |
1772 | ||
1773 | nfs4_renewd_prepare_shutdown(server); | |
54ceac45 | 1774 | nfs_free_server(server); |
f7b422b1 DH |
1775 | } |
1776 | ||
1777 | /* | |
54ceac45 | 1778 | * Clone an NFS4 server record on xdev traversal (FSID-change) |
f7b422b1 | 1779 | */ |
54ceac45 DH |
1780 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags, |
1781 | const char *dev_name, void *raw_data, | |
1782 | struct vfsmount *mnt) | |
f7b422b1 | 1783 | { |
54ceac45 DH |
1784 | struct nfs_clone_mount *data = raw_data; |
1785 | struct super_block *s; | |
1786 | struct nfs_server *server; | |
1787 | struct dentry *mntroot; | |
75180df2 | 1788 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1789 | struct nfs_sb_mountdata sb_mntdata = { |
1790 | .mntflags = flags, | |
1791 | }; | |
54ceac45 | 1792 | int error; |
f7b422b1 | 1793 | |
54ceac45 | 1794 | dprintk("--> nfs4_xdev_get_sb()\n"); |
f7b422b1 | 1795 | |
54ceac45 DH |
1796 | /* create a new volume representation */ |
1797 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
1798 | if (IS_ERR(server)) { | |
1799 | error = PTR_ERR(server); | |
1800 | goto out_err_noserver; | |
f7b422b1 | 1801 | } |
e89a5a43 | 1802 | sb_mntdata.server = server; |
f7b422b1 | 1803 | |
75180df2 TM |
1804 | if (server->flags & NFS4_MOUNT_UNSHARED) |
1805 | compare_super = NULL; | |
1806 | ||
54ceac45 | 1807 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1808 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
1809 | if (IS_ERR(s)) { |
1810 | error = PTR_ERR(s); | |
1811 | goto out_err_nosb; | |
f7b422b1 | 1812 | } |
f7b422b1 | 1813 | |
54ceac45 DH |
1814 | if (s->s_fs_info != server) { |
1815 | nfs_free_server(server); | |
1816 | server = NULL; | |
1817 | } | |
f7b422b1 | 1818 | |
54ceac45 DH |
1819 | if (!s->s_root) { |
1820 | /* initial superblock/root creation */ | |
54ceac45 DH |
1821 | nfs4_clone_super(s, data->sb); |
1822 | } | |
f7b422b1 | 1823 | |
54ceac45 DH |
1824 | mntroot = nfs4_get_root(s, data->fh); |
1825 | if (IS_ERR(mntroot)) { | |
1826 | error = PTR_ERR(mntroot); | |
1827 | goto error_splat_super; | |
1828 | } | |
e9cc6c23 TM |
1829 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
1830 | dput(mntroot); | |
1831 | error = -ESTALE; | |
1832 | goto error_splat_super; | |
1833 | } | |
f7b422b1 | 1834 | |
54ceac45 DH |
1835 | s->s_flags |= MS_ACTIVE; |
1836 | mnt->mnt_sb = s; | |
1837 | mnt->mnt_root = mntroot; | |
1838 | ||
1839 | dprintk("<-- nfs4_xdev_get_sb() = 0\n"); | |
1840 | return 0; | |
1841 | ||
1842 | out_err_nosb: | |
1843 | nfs_free_server(server); | |
1844 | out_err_noserver: | |
1845 | dprintk("<-- nfs4_xdev_get_sb() = %d [error]\n", error); | |
1846 | return error; | |
1847 | ||
1848 | error_splat_super: | |
1849 | up_write(&s->s_umount); | |
1850 | deactivate_super(s); | |
1851 | dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error); | |
1852 | return error; | |
f7b422b1 DH |
1853 | } |
1854 | ||
54ceac45 DH |
1855 | /* |
1856 | * Create an NFS4 server record on referral traversal | |
1857 | */ | |
1858 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, int flags, | |
1859 | const char *dev_name, void *raw_data, | |
1860 | struct vfsmount *mnt) | |
f7b422b1 DH |
1861 | { |
1862 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
1863 | struct super_block *s; |
1864 | struct nfs_server *server; | |
1865 | struct dentry *mntroot; | |
1866 | struct nfs_fh mntfh; | |
75180df2 | 1867 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1868 | struct nfs_sb_mountdata sb_mntdata = { |
1869 | .mntflags = flags, | |
1870 | }; | |
54ceac45 DH |
1871 | int error; |
1872 | ||
1873 | dprintk("--> nfs4_referral_get_sb()\n"); | |
1874 | ||
1875 | /* create a new volume representation */ | |
1876 | server = nfs4_create_referral_server(data, &mntfh); | |
1877 | if (IS_ERR(server)) { | |
1878 | error = PTR_ERR(server); | |
1879 | goto out_err_noserver; | |
1880 | } | |
e89a5a43 | 1881 | sb_mntdata.server = server; |
54ceac45 | 1882 | |
75180df2 TM |
1883 | if (server->flags & NFS4_MOUNT_UNSHARED) |
1884 | compare_super = NULL; | |
1885 | ||
54ceac45 | 1886 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1887 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
1888 | if (IS_ERR(s)) { |
1889 | error = PTR_ERR(s); | |
1890 | goto out_err_nosb; | |
1891 | } | |
1892 | ||
1893 | if (s->s_fs_info != server) { | |
1894 | nfs_free_server(server); | |
1895 | server = NULL; | |
1896 | } | |
1897 | ||
1898 | if (!s->s_root) { | |
1899 | /* initial superblock/root creation */ | |
54ceac45 DH |
1900 | nfs4_fill_super(s); |
1901 | } | |
1902 | ||
f2d0d85e | 1903 | mntroot = nfs4_get_root(s, &mntfh); |
54ceac45 DH |
1904 | if (IS_ERR(mntroot)) { |
1905 | error = PTR_ERR(mntroot); | |
1906 | goto error_splat_super; | |
1907 | } | |
e9cc6c23 TM |
1908 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
1909 | dput(mntroot); | |
1910 | error = -ESTALE; | |
1911 | goto error_splat_super; | |
1912 | } | |
54ceac45 DH |
1913 | |
1914 | s->s_flags |= MS_ACTIVE; | |
1915 | mnt->mnt_sb = s; | |
1916 | mnt->mnt_root = mntroot; | |
1917 | ||
1918 | dprintk("<-- nfs4_referral_get_sb() = 0\n"); | |
1919 | return 0; | |
1920 | ||
1921 | out_err_nosb: | |
1922 | nfs_free_server(server); | |
1923 | out_err_noserver: | |
1924 | dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error); | |
1925 | return error; | |
1926 | ||
1927 | error_splat_super: | |
1928 | up_write(&s->s_umount); | |
1929 | deactivate_super(s); | |
1930 | dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error); | |
1931 | return error; | |
f7b422b1 DH |
1932 | } |
1933 | ||
54ceac45 | 1934 | #endif /* CONFIG_NFS_V4 */ |