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