Commit | Line | Data |
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f7b422b1 DH |
1 | /* |
2 | * linux/fs/nfs/super.c | |
3 | * | |
4 | * Copyright (C) 1992 Rick Sladkey | |
5 | * | |
6 | * nfs superblock handling functions | |
7 | * | |
8 | * Modularised by Alan Cox <Alan.Cox@linux.org>, while hacking some | |
9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. | |
10 | * | |
11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
12 | * J.S.Peatfield@damtp.cam.ac.uk | |
13 | * | |
14 | * Split from inode.c by David Howells <dhowells@redhat.com> | |
15 | * | |
54ceac45 DH |
16 | * - superblocks are indexed on server only - all inodes, dentries, etc. associated with a |
17 | * particular server are held in the same superblock | |
18 | * - NFS superblocks can have several effective roots to the dentry tree | |
19 | * - directory type roots are spliced into the tree when a path from one root reaches the root | |
20 | * of another (see nfs_lookup()) | |
f7b422b1 DH |
21 | */ |
22 | ||
f7b422b1 DH |
23 | #include <linux/module.h> |
24 | #include <linux/init.h> | |
25 | ||
26 | #include <linux/time.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/string.h> | |
30 | #include <linux/stat.h> | |
31 | #include <linux/errno.h> | |
32 | #include <linux/unistd.h> | |
33 | #include <linux/sunrpc/clnt.h> | |
34 | #include <linux/sunrpc/stats.h> | |
35 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 36 | #include <linux/sunrpc/xprtsock.h> |
2cf7ff7a | 37 | #include <linux/sunrpc/xprtrdma.h> |
f7b422b1 DH |
38 | #include <linux/nfs_fs.h> |
39 | #include <linux/nfs_mount.h> | |
40 | #include <linux/nfs4_mount.h> | |
41 | #include <linux/lockd/bind.h> | |
42 | #include <linux/smp_lock.h> | |
43 | #include <linux/seq_file.h> | |
44 | #include <linux/mount.h> | |
45 | #include <linux/nfs_idmap.h> | |
46 | #include <linux/vfs.h> | |
47 | #include <linux/inet.h> | |
fd00a8ff CL |
48 | #include <linux/in6.h> |
49 | #include <net/ipv6.h> | |
f7b422b1 | 50 | #include <linux/nfs_xdr.h> |
b5d5dfbd | 51 | #include <linux/magic.h> |
bf0fd768 | 52 | #include <linux/parser.h> |
f7b422b1 DH |
53 | |
54 | #include <asm/system.h> | |
55 | #include <asm/uaccess.h> | |
56 | ||
57 | #include "nfs4_fs.h" | |
58 | #include "callback.h" | |
59 | #include "delegation.h" | |
60 | #include "iostat.h" | |
61 | #include "internal.h" | |
62 | ||
63 | #define NFSDBG_FACILITY NFSDBG_VFS | |
64 | ||
bf0fd768 CL |
65 | enum { |
66 | /* Mount options that take no arguments */ | |
67 | Opt_soft, Opt_hard, | |
68 | Opt_intr, Opt_nointr, | |
69 | Opt_posix, Opt_noposix, | |
70 | Opt_cto, Opt_nocto, | |
71 | Opt_ac, Opt_noac, | |
72 | Opt_lock, Opt_nolock, | |
73 | Opt_v2, Opt_v3, | |
2cf7ff7a | 74 | Opt_udp, Opt_tcp, Opt_rdma, |
bf0fd768 CL |
75 | Opt_acl, Opt_noacl, |
76 | Opt_rdirplus, Opt_nordirplus, | |
75180df2 | 77 | Opt_sharecache, Opt_nosharecache, |
bf0fd768 CL |
78 | |
79 | /* Mount options that take integer arguments */ | |
80 | Opt_port, | |
81 | Opt_rsize, Opt_wsize, Opt_bsize, | |
82 | Opt_timeo, Opt_retrans, | |
83 | Opt_acregmin, Opt_acregmax, | |
84 | Opt_acdirmin, Opt_acdirmax, | |
85 | Opt_actimeo, | |
86 | Opt_namelen, | |
87 | Opt_mountport, | |
e887cbcf | 88 | Opt_mountvers, |
ad879cef | 89 | Opt_nfsvers, |
bf0fd768 CL |
90 | |
91 | /* Mount options that take string arguments */ | |
33832034 | 92 | Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost, |
0ac83779 | 93 | Opt_addr, Opt_mountaddr, Opt_clientaddr, |
bf0fd768 CL |
94 | |
95 | /* Mount options that are ignored */ | |
96 | Opt_userspace, Opt_deprecated, | |
97 | ||
98 | Opt_err | |
99 | }; | |
100 | ||
101 | static match_table_t nfs_mount_option_tokens = { | |
102 | { Opt_userspace, "bg" }, | |
103 | { Opt_userspace, "fg" }, | |
104 | { Opt_soft, "soft" }, | |
105 | { Opt_hard, "hard" }, | |
106 | { Opt_intr, "intr" }, | |
107 | { Opt_nointr, "nointr" }, | |
108 | { Opt_posix, "posix" }, | |
109 | { Opt_noposix, "noposix" }, | |
110 | { Opt_cto, "cto" }, | |
111 | { Opt_nocto, "nocto" }, | |
112 | { Opt_ac, "ac" }, | |
113 | { Opt_noac, "noac" }, | |
114 | { Opt_lock, "lock" }, | |
115 | { Opt_nolock, "nolock" }, | |
116 | { Opt_v2, "v2" }, | |
117 | { Opt_v3, "v3" }, | |
118 | { Opt_udp, "udp" }, | |
119 | { Opt_tcp, "tcp" }, | |
2cf7ff7a | 120 | { Opt_rdma, "rdma" }, |
bf0fd768 CL |
121 | { Opt_acl, "acl" }, |
122 | { Opt_noacl, "noacl" }, | |
123 | { Opt_rdirplus, "rdirplus" }, | |
124 | { Opt_nordirplus, "nordirplus" }, | |
75180df2 TM |
125 | { Opt_sharecache, "sharecache" }, |
126 | { Opt_nosharecache, "nosharecache" }, | |
bf0fd768 CL |
127 | |
128 | { Opt_port, "port=%u" }, | |
129 | { Opt_rsize, "rsize=%u" }, | |
130 | { Opt_wsize, "wsize=%u" }, | |
131 | { Opt_bsize, "bsize=%u" }, | |
132 | { Opt_timeo, "timeo=%u" }, | |
133 | { Opt_retrans, "retrans=%u" }, | |
134 | { Opt_acregmin, "acregmin=%u" }, | |
135 | { Opt_acregmax, "acregmax=%u" }, | |
136 | { Opt_acdirmin, "acdirmin=%u" }, | |
137 | { Opt_acdirmax, "acdirmax=%u" }, | |
138 | { Opt_actimeo, "actimeo=%u" }, | |
139 | { Opt_userspace, "retry=%u" }, | |
140 | { Opt_namelen, "namlen=%u" }, | |
141 | { Opt_mountport, "mountport=%u" }, | |
bf0fd768 | 142 | { Opt_mountvers, "mountvers=%u" }, |
bf0fd768 CL |
143 | { Opt_nfsvers, "nfsvers=%u" }, |
144 | { Opt_nfsvers, "vers=%u" }, | |
145 | ||
146 | { Opt_sec, "sec=%s" }, | |
147 | { Opt_proto, "proto=%s" }, | |
148 | { Opt_mountproto, "mountproto=%s" }, | |
149 | { Opt_addr, "addr=%s" }, | |
150 | { Opt_clientaddr, "clientaddr=%s" }, | |
33832034 | 151 | { Opt_mounthost, "mounthost=%s" }, |
0ac83779 | 152 | { Opt_mountaddr, "mountaddr=%s" }, |
bf0fd768 CL |
153 | |
154 | { Opt_err, NULL } | |
155 | }; | |
156 | ||
157 | enum { | |
2cf7ff7a | 158 | Opt_xprt_udp, Opt_xprt_tcp, Opt_xprt_rdma, |
bf0fd768 CL |
159 | |
160 | Opt_xprt_err | |
161 | }; | |
162 | ||
163 | static match_table_t nfs_xprt_protocol_tokens = { | |
164 | { Opt_xprt_udp, "udp" }, | |
165 | { Opt_xprt_tcp, "tcp" }, | |
2cf7ff7a | 166 | { Opt_xprt_rdma, "rdma" }, |
bf0fd768 CL |
167 | |
168 | { Opt_xprt_err, NULL } | |
169 | }; | |
170 | ||
171 | enum { | |
172 | Opt_sec_none, Opt_sec_sys, | |
173 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
174 | Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, | |
175 | Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, | |
176 | ||
177 | Opt_sec_err | |
178 | }; | |
179 | ||
180 | static match_table_t nfs_secflavor_tokens = { | |
181 | { Opt_sec_none, "none" }, | |
182 | { Opt_sec_none, "null" }, | |
183 | { Opt_sec_sys, "sys" }, | |
184 | ||
185 | { Opt_sec_krb5, "krb5" }, | |
186 | { Opt_sec_krb5i, "krb5i" }, | |
187 | { Opt_sec_krb5p, "krb5p" }, | |
188 | ||
189 | { Opt_sec_lkey, "lkey" }, | |
190 | { Opt_sec_lkeyi, "lkeyi" }, | |
191 | { Opt_sec_lkeyp, "lkeyp" }, | |
192 | ||
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 | 204 | static void nfs_kill_super(struct super_block *); |
ef818a28 | 205 | static void nfs_put_super(struct super_block *); |
f7b422b1 DH |
206 | |
207 | static struct file_system_type nfs_fs_type = { | |
208 | .owner = THIS_MODULE, | |
209 | .name = "nfs", | |
210 | .get_sb = nfs_get_sb, | |
211 | .kill_sb = nfs_kill_super, | |
349457cc | 212 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
213 | }; |
214 | ||
54ceac45 | 215 | struct file_system_type nfs_xdev_fs_type = { |
f7b422b1 DH |
216 | .owner = THIS_MODULE, |
217 | .name = "nfs", | |
54ceac45 | 218 | .get_sb = nfs_xdev_get_sb, |
f7b422b1 | 219 | .kill_sb = nfs_kill_super, |
349457cc | 220 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
221 | }; |
222 | ||
ee9b6d61 | 223 | static const struct super_operations nfs_sops = { |
f7b422b1 DH |
224 | .alloc_inode = nfs_alloc_inode, |
225 | .destroy_inode = nfs_destroy_inode, | |
226 | .write_inode = nfs_write_inode, | |
ef818a28 | 227 | .put_super = nfs_put_super, |
f7b422b1 DH |
228 | .statfs = nfs_statfs, |
229 | .clear_inode = nfs_clear_inode, | |
230 | .umount_begin = nfs_umount_begin, | |
231 | .show_options = nfs_show_options, | |
232 | .show_stats = nfs_show_stats, | |
233 | }; | |
234 | ||
235 | #ifdef CONFIG_NFS_V4 | |
816724e6 TM |
236 | static int nfs4_get_sb(struct file_system_type *fs_type, |
237 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
54ceac45 DH |
238 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, |
239 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
240 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, | |
241 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); | |
f7b422b1 DH |
242 | static void nfs4_kill_super(struct super_block *sb); |
243 | ||
244 | static struct file_system_type nfs4_fs_type = { | |
245 | .owner = THIS_MODULE, | |
246 | .name = "nfs4", | |
247 | .get_sb = nfs4_get_sb, | |
248 | .kill_sb = nfs4_kill_super, | |
349457cc | 249 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
250 | }; |
251 | ||
54ceac45 | 252 | struct file_system_type nfs4_xdev_fs_type = { |
f7b422b1 DH |
253 | .owner = THIS_MODULE, |
254 | .name = "nfs4", | |
54ceac45 | 255 | .get_sb = nfs4_xdev_get_sb, |
f7b422b1 | 256 | .kill_sb = nfs4_kill_super, |
349457cc | 257 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
258 | }; |
259 | ||
54ceac45 | 260 | struct file_system_type nfs4_referral_fs_type = { |
f7b422b1 DH |
261 | .owner = THIS_MODULE, |
262 | .name = "nfs4", | |
54ceac45 | 263 | .get_sb = nfs4_referral_get_sb, |
f7b422b1 | 264 | .kill_sb = nfs4_kill_super, |
349457cc | 265 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
266 | }; |
267 | ||
ee9b6d61 | 268 | static const struct super_operations nfs4_sops = { |
f7b422b1 DH |
269 | .alloc_inode = nfs_alloc_inode, |
270 | .destroy_inode = nfs_destroy_inode, | |
271 | .write_inode = nfs_write_inode, | |
272 | .statfs = nfs_statfs, | |
273 | .clear_inode = nfs4_clear_inode, | |
274 | .umount_begin = nfs_umount_begin, | |
275 | .show_options = nfs_show_options, | |
276 | .show_stats = nfs_show_stats, | |
277 | }; | |
278 | #endif | |
279 | ||
8e1f936b RR |
280 | static struct shrinker acl_shrinker = { |
281 | .shrink = nfs_access_cache_shrinker, | |
282 | .seeks = DEFAULT_SEEKS, | |
283 | }; | |
979df72e | 284 | |
f7b422b1 DH |
285 | /* |
286 | * Register the NFS filesystems | |
287 | */ | |
288 | int __init register_nfs_fs(void) | |
289 | { | |
290 | int ret; | |
291 | ||
292 | ret = register_filesystem(&nfs_fs_type); | |
293 | if (ret < 0) | |
294 | goto error_0; | |
295 | ||
f7b422b1 DH |
296 | ret = nfs_register_sysctl(); |
297 | if (ret < 0) | |
298 | goto error_1; | |
89a09141 | 299 | #ifdef CONFIG_NFS_V4 |
f7b422b1 DH |
300 | ret = register_filesystem(&nfs4_fs_type); |
301 | if (ret < 0) | |
302 | goto error_2; | |
303 | #endif | |
8e1f936b | 304 | register_shrinker(&acl_shrinker); |
f7b422b1 DH |
305 | return 0; |
306 | ||
307 | #ifdef CONFIG_NFS_V4 | |
308 | error_2: | |
309 | nfs_unregister_sysctl(); | |
89a09141 | 310 | #endif |
f7b422b1 DH |
311 | error_1: |
312 | unregister_filesystem(&nfs_fs_type); | |
f7b422b1 DH |
313 | error_0: |
314 | return ret; | |
315 | } | |
316 | ||
317 | /* | |
318 | * Unregister the NFS filesystems | |
319 | */ | |
320 | void __exit unregister_nfs_fs(void) | |
321 | { | |
8e1f936b | 322 | unregister_shrinker(&acl_shrinker); |
f7b422b1 DH |
323 | #ifdef CONFIG_NFS_V4 |
324 | unregister_filesystem(&nfs4_fs_type); | |
f7b422b1 | 325 | #endif |
49af7ee1 | 326 | nfs_unregister_sysctl(); |
f7b422b1 DH |
327 | unregister_filesystem(&nfs_fs_type); |
328 | } | |
329 | ||
ef818a28 SD |
330 | void nfs_sb_active(struct nfs_server *server) |
331 | { | |
332 | atomic_inc(&server->active); | |
333 | } | |
334 | ||
335 | void nfs_sb_deactive(struct nfs_server *server) | |
336 | { | |
337 | if (atomic_dec_and_test(&server->active)) | |
338 | wake_up(&server->active_wq); | |
339 | } | |
340 | ||
341 | static void nfs_put_super(struct super_block *sb) | |
342 | { | |
343 | struct nfs_server *server = NFS_SB(sb); | |
344 | /* | |
345 | * Make sure there are no outstanding ops to this server. | |
346 | * If so, wait for them to finish before allowing the | |
347 | * unmount to continue. | |
348 | */ | |
349 | wait_event(server->active_wq, atomic_read(&server->active) == 0); | |
350 | } | |
351 | ||
f7b422b1 DH |
352 | /* |
353 | * Deliver file system statistics to userspace | |
354 | */ | |
816724e6 | 355 | static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
f7b422b1 | 356 | { |
0c7d90cf | 357 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
f7b422b1 DH |
358 | unsigned char blockbits; |
359 | unsigned long blockres; | |
0c7d90cf | 360 | struct nfs_fh *fh = NFS_FH(dentry->d_inode); |
f7b422b1 DH |
361 | struct nfs_fattr fattr; |
362 | struct nfs_fsstat res = { | |
363 | .fattr = &fattr, | |
364 | }; | |
365 | int error; | |
366 | ||
367 | lock_kernel(); | |
368 | ||
8fa5c000 | 369 | error = server->nfs_client->rpc_ops->statfs(server, fh, &res); |
f7b422b1 DH |
370 | if (error < 0) |
371 | goto out_err; | |
1a0ba9ae | 372 | buf->f_type = NFS_SUPER_MAGIC; |
f7b422b1 DH |
373 | |
374 | /* | |
375 | * Current versions of glibc do not correctly handle the | |
376 | * case where f_frsize != f_bsize. Eventually we want to | |
377 | * report the value of wtmult in this field. | |
378 | */ | |
0c7d90cf | 379 | buf->f_frsize = dentry->d_sb->s_blocksize; |
f7b422b1 DH |
380 | |
381 | /* | |
382 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
383 | * are reported in units of f_frsize. Linux hasn't had | |
384 | * an f_frsize field in its statfs struct until recently, | |
385 | * thus historically Linux's sys_statfs reports these | |
386 | * fields in units of f_bsize. | |
387 | */ | |
0c7d90cf DH |
388 | buf->f_bsize = dentry->d_sb->s_blocksize; |
389 | blockbits = dentry->d_sb->s_blocksize_bits; | |
f7b422b1 DH |
390 | blockres = (1 << blockbits) - 1; |
391 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
392 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
393 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
394 | ||
395 | buf->f_files = res.tfiles; | |
396 | buf->f_ffree = res.afiles; | |
397 | ||
398 | buf->f_namelen = server->namelen; | |
1a0ba9ae | 399 | |
f7b422b1 DH |
400 | unlock_kernel(); |
401 | return 0; | |
402 | ||
403 | out_err: | |
404 | dprintk("%s: statfs error = %d\n", __FUNCTION__, -error); | |
1a0ba9ae AA |
405 | unlock_kernel(); |
406 | return error; | |
f7b422b1 DH |
407 | } |
408 | ||
7d4e2747 DH |
409 | /* |
410 | * Map the security flavour number to a name | |
411 | */ | |
81039f1f TM |
412 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
413 | { | |
7d4e2747 | 414 | static const struct { |
81039f1f TM |
415 | rpc_authflavor_t flavour; |
416 | const char *str; | |
417 | } sec_flavours[] = { | |
418 | { RPC_AUTH_NULL, "null" }, | |
419 | { RPC_AUTH_UNIX, "sys" }, | |
420 | { RPC_AUTH_GSS_KRB5, "krb5" }, | |
421 | { RPC_AUTH_GSS_KRB5I, "krb5i" }, | |
422 | { RPC_AUTH_GSS_KRB5P, "krb5p" }, | |
423 | { RPC_AUTH_GSS_LKEY, "lkey" }, | |
424 | { RPC_AUTH_GSS_LKEYI, "lkeyi" }, | |
425 | { RPC_AUTH_GSS_LKEYP, "lkeyp" }, | |
426 | { RPC_AUTH_GSS_SPKM, "spkm" }, | |
427 | { RPC_AUTH_GSS_SPKMI, "spkmi" }, | |
428 | { RPC_AUTH_GSS_SPKMP, "spkmp" }, | |
4d81cd16 | 429 | { UINT_MAX, "unknown" } |
81039f1f TM |
430 | }; |
431 | int i; | |
432 | ||
4d81cd16 | 433 | for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) { |
81039f1f TM |
434 | if (sec_flavours[i].flavour == flavour) |
435 | break; | |
436 | } | |
437 | return sec_flavours[i].str; | |
438 | } | |
439 | ||
f7b422b1 DH |
440 | /* |
441 | * Describe the mount options in force on this server representation | |
442 | */ | |
443 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults) | |
444 | { | |
509de811 | 445 | static const struct proc_nfs_info { |
f7b422b1 | 446 | int flag; |
509de811 DH |
447 | const char *str; |
448 | const char *nostr; | |
f7b422b1 DH |
449 | } nfs_info[] = { |
450 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, | |
bcf35617 | 451 | { NFS_MOUNT_INTR, ",intr", ",nointr" }, |
f7b422b1 DH |
452 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
453 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
454 | { NFS_MOUNT_NONLM, ",nolock", "" }, | |
455 | { NFS_MOUNT_NOACL, ",noacl", "" }, | |
74dd34e6 | 456 | { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" }, |
75180df2 | 457 | { NFS_MOUNT_UNSHARED, ",nosharecache", ""}, |
f7b422b1 DH |
458 | { 0, NULL, NULL } |
459 | }; | |
509de811 | 460 | const struct proc_nfs_info *nfs_infop; |
8fa5c000 | 461 | struct nfs_client *clp = nfss->nfs_client; |
f7b422b1 | 462 | |
8fa5c000 | 463 | seq_printf(m, ",vers=%d", clp->rpc_ops->version); |
f7b422b1 DH |
464 | seq_printf(m, ",rsize=%d", nfss->rsize); |
465 | seq_printf(m, ",wsize=%d", nfss->wsize); | |
466 | if (nfss->acregmin != 3*HZ || showdefaults) | |
467 | seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ); | |
468 | if (nfss->acregmax != 60*HZ || showdefaults) | |
469 | seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ); | |
470 | if (nfss->acdirmin != 30*HZ || showdefaults) | |
471 | seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ); | |
472 | if (nfss->acdirmax != 60*HZ || showdefaults) | |
473 | seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ); | |
474 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { | |
475 | if (nfss->flags & nfs_infop->flag) | |
476 | seq_puts(m, nfs_infop->str); | |
477 | else | |
478 | seq_puts(m, nfs_infop->nostr); | |
479 | } | |
56928edd TT |
480 | seq_printf(m, ",proto=%s", |
481 | rpc_peeraddr2str(nfss->client, RPC_DISPLAY_PROTO)); | |
5006a76c DH |
482 | seq_printf(m, ",timeo=%lu", 10U * clp->retrans_timeo / HZ); |
483 | seq_printf(m, ",retrans=%u", clp->retrans_count); | |
81039f1f | 484 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
f7b422b1 DH |
485 | } |
486 | ||
487 | /* | |
488 | * Describe the mount options on this VFS mountpoint | |
489 | */ | |
490 | static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) | |
491 | { | |
492 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
493 | ||
494 | nfs_show_mount_options(m, nfss, 0); | |
495 | ||
5d8515ca CL |
496 | seq_printf(m, ",addr=%s", |
497 | rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient, | |
498 | RPC_DISPLAY_ADDR)); | |
f7b422b1 DH |
499 | |
500 | return 0; | |
501 | } | |
502 | ||
503 | /* | |
504 | * Present statistical information for this VFS mountpoint | |
505 | */ | |
506 | static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) | |
507 | { | |
508 | int i, cpu; | |
509 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
510 | struct rpc_auth *auth = nfss->client->cl_auth; | |
511 | struct nfs_iostats totals = { }; | |
512 | ||
513 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
514 | ||
515 | /* | |
516 | * Display all mount option settings | |
517 | */ | |
518 | seq_printf(m, "\n\topts:\t"); | |
519 | seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw"); | |
520 | seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); | |
521 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : ""); | |
522 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); | |
523 | nfs_show_mount_options(m, nfss, 1); | |
524 | ||
525 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); | |
526 | ||
527 | seq_printf(m, "\n\tcaps:\t"); | |
528 | seq_printf(m, "caps=0x%x", nfss->caps); | |
529 | seq_printf(m, ",wtmult=%d", nfss->wtmult); | |
530 | seq_printf(m, ",dtsize=%d", nfss->dtsize); | |
531 | seq_printf(m, ",bsize=%d", nfss->bsize); | |
532 | seq_printf(m, ",namelen=%d", nfss->namelen); | |
533 | ||
534 | #ifdef CONFIG_NFS_V4 | |
40c55319 | 535 | if (nfss->nfs_client->rpc_ops->version == 4) { |
f7b422b1 DH |
536 | seq_printf(m, "\n\tnfsv4:\t"); |
537 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); | |
538 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
539 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); | |
540 | } | |
541 | #endif | |
542 | ||
543 | /* | |
544 | * Display security flavor in effect for this mount | |
545 | */ | |
546 | seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor); | |
547 | if (auth->au_flavor) | |
548 | seq_printf(m, ",pseudoflavor=%d", auth->au_flavor); | |
549 | ||
550 | /* | |
551 | * Display superblock I/O counters | |
552 | */ | |
553 | for_each_possible_cpu(cpu) { | |
554 | struct nfs_iostats *stats; | |
555 | ||
556 | preempt_disable(); | |
557 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
558 | ||
559 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
560 | totals.events[i] += stats->events[i]; | |
561 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
562 | totals.bytes[i] += stats->bytes[i]; | |
563 | ||
564 | preempt_enable(); | |
565 | } | |
566 | ||
567 | seq_printf(m, "\n\tevents:\t"); | |
568 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
569 | seq_printf(m, "%lu ", totals.events[i]); | |
570 | seq_printf(m, "\n\tbytes:\t"); | |
571 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
572 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
573 | seq_printf(m, "\n"); | |
574 | ||
575 | rpc_print_iostats(m, nfss->client); | |
576 | ||
577 | return 0; | |
578 | } | |
579 | ||
580 | /* | |
581 | * Begin unmount by attempting to remove all automounted mountpoints we added | |
54ceac45 | 582 | * in response to xdev traversals and referrals |
f7b422b1 DH |
583 | */ |
584 | static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags) | |
585 | { | |
fc6ae3cf TM |
586 | struct nfs_server *server = NFS_SB(vfsmnt->mnt_sb); |
587 | struct rpc_clnt *rpc; | |
588 | ||
f7b422b1 | 589 | shrink_submounts(vfsmnt, &nfs_automount_list); |
fc6ae3cf TM |
590 | |
591 | if (!(flags & MNT_FORCE)) | |
592 | return; | |
593 | /* -EIO all pending I/O */ | |
594 | rpc = server->client_acl; | |
595 | if (!IS_ERR(rpc)) | |
596 | rpc_killall_tasks(rpc); | |
597 | rpc = server->client; | |
598 | if (!IS_ERR(rpc)) | |
599 | rpc_killall_tasks(rpc); | |
f7b422b1 DH |
600 | } |
601 | ||
04dcd6e3 CL |
602 | /* |
603 | * Set the port number in an address. Be agnostic about the address family. | |
604 | */ | |
605 | static void nfs_set_port(struct sockaddr *sap, unsigned short port) | |
606 | { | |
607 | switch (sap->sa_family) { | |
608 | case AF_INET: { | |
609 | struct sockaddr_in *ap = (struct sockaddr_in *)sap; | |
610 | ap->sin_port = htons(port); | |
611 | break; | |
612 | } | |
613 | case AF_INET6: { | |
614 | struct sockaddr_in6 *ap = (struct sockaddr_in6 *)sap; | |
615 | ap->sin6_port = htons(port); | |
616 | break; | |
617 | } | |
618 | } | |
619 | } | |
620 | ||
fc50d58f | 621 | /* |
cdcd7f9a CL |
622 | * Sanity-check a server address provided by the mount command. |
623 | * | |
624 | * Address family must be initialized, and address must not be | |
625 | * the ANY address for that family. | |
fc50d58f CL |
626 | */ |
627 | static int nfs_verify_server_address(struct sockaddr *addr) | |
628 | { | |
629 | switch (addr->sa_family) { | |
630 | case AF_INET: { | |
cdcd7f9a CL |
631 | struct sockaddr_in *sa = (struct sockaddr_in *)addr; |
632 | return sa->sin_addr.s_addr != INADDR_ANY; | |
633 | } | |
634 | case AF_INET6: { | |
635 | struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr; | |
636 | return !ipv6_addr_any(sa); | |
fc50d58f CL |
637 | } |
638 | } | |
639 | ||
640 | return 0; | |
641 | } | |
642 | ||
bf0fd768 CL |
643 | /* |
644 | * Error-check and convert a string of mount options from user space into | |
645 | * a data structure | |
646 | */ | |
647 | static int nfs_parse_mount_options(char *raw, | |
648 | struct nfs_parsed_mount_data *mnt) | |
649 | { | |
650 | char *p, *string; | |
04dcd6e3 | 651 | unsigned short port = 0; |
bf0fd768 CL |
652 | |
653 | if (!raw) { | |
654 | dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); | |
655 | return 1; | |
656 | } | |
657 | dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); | |
658 | ||
659 | while ((p = strsep(&raw, ",")) != NULL) { | |
660 | substring_t args[MAX_OPT_ARGS]; | |
661 | int option, token; | |
662 | ||
663 | if (!*p) | |
664 | continue; | |
665 | ||
666 | dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); | |
667 | ||
668 | token = match_token(p, nfs_mount_option_tokens, args); | |
669 | switch (token) { | |
670 | case Opt_soft: | |
671 | mnt->flags |= NFS_MOUNT_SOFT; | |
672 | break; | |
673 | case Opt_hard: | |
674 | mnt->flags &= ~NFS_MOUNT_SOFT; | |
675 | break; | |
676 | case Opt_intr: | |
677 | mnt->flags |= NFS_MOUNT_INTR; | |
678 | break; | |
679 | case Opt_nointr: | |
680 | mnt->flags &= ~NFS_MOUNT_INTR; | |
681 | break; | |
682 | case Opt_posix: | |
683 | mnt->flags |= NFS_MOUNT_POSIX; | |
684 | break; | |
685 | case Opt_noposix: | |
686 | mnt->flags &= ~NFS_MOUNT_POSIX; | |
687 | break; | |
688 | case Opt_cto: | |
689 | mnt->flags &= ~NFS_MOUNT_NOCTO; | |
690 | break; | |
691 | case Opt_nocto: | |
692 | mnt->flags |= NFS_MOUNT_NOCTO; | |
693 | break; | |
694 | case Opt_ac: | |
695 | mnt->flags &= ~NFS_MOUNT_NOAC; | |
696 | break; | |
697 | case Opt_noac: | |
698 | mnt->flags |= NFS_MOUNT_NOAC; | |
699 | break; | |
700 | case Opt_lock: | |
701 | mnt->flags &= ~NFS_MOUNT_NONLM; | |
702 | break; | |
703 | case Opt_nolock: | |
704 | mnt->flags |= NFS_MOUNT_NONLM; | |
705 | break; | |
706 | case Opt_v2: | |
707 | mnt->flags &= ~NFS_MOUNT_VER3; | |
708 | break; | |
709 | case Opt_v3: | |
710 | mnt->flags |= NFS_MOUNT_VER3; | |
711 | break; | |
712 | case Opt_udp: | |
713 | mnt->flags &= ~NFS_MOUNT_TCP; | |
0896a725 | 714 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 CL |
715 | mnt->timeo = 7; |
716 | mnt->retrans = 5; | |
717 | break; | |
718 | case Opt_tcp: | |
719 | mnt->flags |= NFS_MOUNT_TCP; | |
0896a725 | 720 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 CL |
721 | mnt->timeo = 600; |
722 | mnt->retrans = 2; | |
723 | break; | |
2cf7ff7a TT |
724 | case Opt_rdma: |
725 | mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ | |
726 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
727 | mnt->timeo = 600; | |
728 | mnt->retrans = 2; | |
729 | break; | |
bf0fd768 CL |
730 | case Opt_acl: |
731 | mnt->flags &= ~NFS_MOUNT_NOACL; | |
732 | break; | |
733 | case Opt_noacl: | |
734 | mnt->flags |= NFS_MOUNT_NOACL; | |
735 | break; | |
736 | case Opt_rdirplus: | |
737 | mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; | |
738 | break; | |
739 | case Opt_nordirplus: | |
740 | mnt->flags |= NFS_MOUNT_NORDIRPLUS; | |
741 | break; | |
75180df2 TM |
742 | case Opt_sharecache: |
743 | mnt->flags &= ~NFS_MOUNT_UNSHARED; | |
744 | break; | |
745 | case Opt_nosharecache: | |
746 | mnt->flags |= NFS_MOUNT_UNSHARED; | |
747 | break; | |
bf0fd768 CL |
748 | |
749 | case Opt_port: | |
750 | if (match_int(args, &option)) | |
751 | return 0; | |
752 | if (option < 0 || option > 65535) | |
753 | return 0; | |
04dcd6e3 | 754 | port = option; |
bf0fd768 CL |
755 | break; |
756 | case Opt_rsize: | |
757 | if (match_int(args, &mnt->rsize)) | |
758 | return 0; | |
759 | break; | |
760 | case Opt_wsize: | |
761 | if (match_int(args, &mnt->wsize)) | |
762 | return 0; | |
763 | break; | |
764 | case Opt_bsize: | |
765 | if (match_int(args, &option)) | |
766 | return 0; | |
767 | if (option < 0) | |
768 | return 0; | |
769 | mnt->bsize = option; | |
770 | break; | |
771 | case Opt_timeo: | |
772 | if (match_int(args, &mnt->timeo)) | |
773 | return 0; | |
774 | break; | |
775 | case Opt_retrans: | |
776 | if (match_int(args, &mnt->retrans)) | |
777 | return 0; | |
778 | break; | |
779 | case Opt_acregmin: | |
780 | if (match_int(args, &mnt->acregmin)) | |
781 | return 0; | |
782 | break; | |
783 | case Opt_acregmax: | |
784 | if (match_int(args, &mnt->acregmax)) | |
785 | return 0; | |
786 | break; | |
787 | case Opt_acdirmin: | |
788 | if (match_int(args, &mnt->acdirmin)) | |
789 | return 0; | |
790 | break; | |
791 | case Opt_acdirmax: | |
792 | if (match_int(args, &mnt->acdirmax)) | |
793 | return 0; | |
794 | break; | |
795 | case Opt_actimeo: | |
796 | if (match_int(args, &option)) | |
797 | return 0; | |
798 | if (option < 0) | |
799 | return 0; | |
800 | mnt->acregmin = | |
801 | mnt->acregmax = | |
802 | mnt->acdirmin = | |
803 | mnt->acdirmax = option; | |
804 | break; | |
805 | case Opt_namelen: | |
806 | if (match_int(args, &mnt->namlen)) | |
807 | return 0; | |
808 | break; | |
809 | case Opt_mountport: | |
810 | if (match_int(args, &option)) | |
811 | return 0; | |
812 | if (option < 0 || option > 65535) | |
813 | return 0; | |
814 | mnt->mount_server.port = option; | |
815 | break; | |
bf0fd768 CL |
816 | case Opt_mountvers: |
817 | if (match_int(args, &option)) | |
818 | return 0; | |
819 | if (option < 0) | |
820 | return 0; | |
821 | mnt->mount_server.version = option; | |
822 | break; | |
bf0fd768 CL |
823 | case Opt_nfsvers: |
824 | if (match_int(args, &option)) | |
825 | return 0; | |
826 | switch (option) { | |
827 | case 2: | |
828 | mnt->flags &= ~NFS_MOUNT_VER3; | |
829 | break; | |
830 | case 3: | |
831 | mnt->flags |= NFS_MOUNT_VER3; | |
832 | break; | |
833 | default: | |
834 | goto out_unrec_vers; | |
835 | } | |
836 | break; | |
837 | ||
838 | case Opt_sec: | |
839 | string = match_strdup(args); | |
840 | if (string == NULL) | |
841 | goto out_nomem; | |
842 | token = match_token(string, nfs_secflavor_tokens, args); | |
843 | kfree(string); | |
844 | ||
845 | /* | |
846 | * The flags setting is for v2/v3. The flavor_len | |
847 | * setting is for v4. v2/v3 also need to know the | |
848 | * difference between NULL and UNIX. | |
849 | */ | |
850 | switch (token) { | |
851 | case Opt_sec_none: | |
852 | mnt->flags &= ~NFS_MOUNT_SECFLAVOUR; | |
853 | mnt->auth_flavor_len = 0; | |
854 | mnt->auth_flavors[0] = RPC_AUTH_NULL; | |
855 | break; | |
856 | case Opt_sec_sys: | |
857 | mnt->flags &= ~NFS_MOUNT_SECFLAVOUR; | |
858 | mnt->auth_flavor_len = 0; | |
859 | mnt->auth_flavors[0] = RPC_AUTH_UNIX; | |
860 | break; | |
861 | case Opt_sec_krb5: | |
862 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
863 | mnt->auth_flavor_len = 1; | |
864 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5; | |
865 | break; | |
866 | case Opt_sec_krb5i: | |
867 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
868 | mnt->auth_flavor_len = 1; | |
869 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I; | |
870 | break; | |
871 | case Opt_sec_krb5p: | |
872 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
873 | mnt->auth_flavor_len = 1; | |
874 | mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P; | |
875 | break; | |
876 | case Opt_sec_lkey: | |
877 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
878 | mnt->auth_flavor_len = 1; | |
879 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY; | |
880 | break; | |
881 | case Opt_sec_lkeyi: | |
882 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
883 | mnt->auth_flavor_len = 1; | |
884 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI; | |
885 | break; | |
886 | case Opt_sec_lkeyp: | |
887 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
888 | mnt->auth_flavor_len = 1; | |
889 | mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP; | |
890 | break; | |
891 | case Opt_sec_spkm: | |
892 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
893 | mnt->auth_flavor_len = 1; | |
894 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM; | |
895 | break; | |
896 | case Opt_sec_spkmi: | |
897 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
898 | mnt->auth_flavor_len = 1; | |
899 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI; | |
900 | break; | |
901 | case Opt_sec_spkmp: | |
902 | mnt->flags |= NFS_MOUNT_SECFLAVOUR; | |
903 | mnt->auth_flavor_len = 1; | |
904 | mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP; | |
905 | break; | |
906 | default: | |
907 | goto out_unrec_sec; | |
908 | } | |
909 | break; | |
910 | case Opt_proto: | |
911 | string = match_strdup(args); | |
912 | if (string == NULL) | |
913 | goto out_nomem; | |
914 | token = match_token(string, | |
915 | nfs_xprt_protocol_tokens, args); | |
916 | kfree(string); | |
917 | ||
918 | switch (token) { | |
fdb66ff4 | 919 | case Opt_xprt_udp: |
bf0fd768 | 920 | mnt->flags &= ~NFS_MOUNT_TCP; |
0896a725 | 921 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 CL |
922 | mnt->timeo = 7; |
923 | mnt->retrans = 5; | |
924 | break; | |
fdb66ff4 | 925 | case Opt_xprt_tcp: |
bf0fd768 | 926 | mnt->flags |= NFS_MOUNT_TCP; |
0896a725 | 927 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 CL |
928 | mnt->timeo = 600; |
929 | mnt->retrans = 2; | |
930 | break; | |
2cf7ff7a TT |
931 | case Opt_xprt_rdma: |
932 | /* vector side protocols to TCP */ | |
933 | mnt->flags |= NFS_MOUNT_TCP; | |
934 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
935 | mnt->timeo = 600; | |
936 | mnt->retrans = 2; | |
937 | break; | |
bf0fd768 CL |
938 | default: |
939 | goto out_unrec_xprt; | |
940 | } | |
941 | break; | |
942 | case Opt_mountproto: | |
943 | string = match_strdup(args); | |
944 | if (string == NULL) | |
945 | goto out_nomem; | |
946 | token = match_token(string, | |
947 | nfs_xprt_protocol_tokens, args); | |
948 | kfree(string); | |
949 | ||
950 | switch (token) { | |
fdb66ff4 | 951 | case Opt_xprt_udp: |
0896a725 | 952 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 | 953 | break; |
fdb66ff4 | 954 | case Opt_xprt_tcp: |
0896a725 | 955 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 956 | break; |
2cf7ff7a | 957 | case Opt_xprt_rdma: /* not used for side protocols */ |
bf0fd768 CL |
958 | default: |
959 | goto out_unrec_xprt; | |
960 | } | |
961 | break; | |
962 | case Opt_addr: | |
963 | string = match_strdup(args); | |
964 | if (string == NULL) | |
965 | goto out_nomem; | |
966 | mnt->nfs_server.address.sin_family = AF_INET; | |
967 | mnt->nfs_server.address.sin_addr.s_addr = | |
968 | in_aton(string); | |
969 | kfree(string); | |
970 | break; | |
971 | case Opt_clientaddr: | |
972 | string = match_strdup(args); | |
973 | if (string == NULL) | |
974 | goto out_nomem; | |
975 | mnt->client_address = string; | |
976 | break; | |
33832034 CL |
977 | case Opt_mounthost: |
978 | string = match_strdup(args); | |
979 | if (string == NULL) | |
980 | goto out_nomem; | |
981 | mnt->mount_server.hostname = string; | |
982 | break; | |
0ac83779 | 983 | case Opt_mountaddr: |
bf0fd768 CL |
984 | string = match_strdup(args); |
985 | if (string == NULL) | |
986 | goto out_nomem; | |
987 | mnt->mount_server.address.sin_family = AF_INET; | |
988 | mnt->mount_server.address.sin_addr.s_addr = | |
989 | in_aton(string); | |
990 | kfree(string); | |
991 | break; | |
992 | ||
993 | case Opt_userspace: | |
994 | case Opt_deprecated: | |
995 | break; | |
996 | ||
997 | default: | |
998 | goto out_unknown; | |
999 | } | |
1000 | } | |
1001 | ||
04dcd6e3 CL |
1002 | nfs_set_port((struct sockaddr *)&mnt->nfs_server.address, port); |
1003 | ||
bf0fd768 CL |
1004 | return 1; |
1005 | ||
1006 | out_nomem: | |
1007 | printk(KERN_INFO "NFS: not enough memory to parse option\n"); | |
1008 | return 0; | |
1009 | ||
1010 | out_unrec_vers: | |
1011 | printk(KERN_INFO "NFS: unrecognized NFS version number\n"); | |
1012 | return 0; | |
1013 | ||
1014 | out_unrec_xprt: | |
1015 | printk(KERN_INFO "NFS: unrecognized transport protocol\n"); | |
1016 | return 0; | |
1017 | ||
1018 | out_unrec_sec: | |
1019 | printk(KERN_INFO "NFS: unrecognized security flavor\n"); | |
1020 | return 0; | |
1021 | ||
1022 | out_unknown: | |
1023 | printk(KERN_INFO "NFS: unknown mount option: %s\n", p); | |
1024 | return 0; | |
1025 | } | |
1026 | ||
0076d7b7 CL |
1027 | /* |
1028 | * Use the remote server's MOUNT service to request the NFS file handle | |
1029 | * corresponding to the provided path. | |
1030 | */ | |
1031 | static int nfs_try_mount(struct nfs_parsed_mount_data *args, | |
1032 | struct nfs_fh *root_fh) | |
1033 | { | |
1034 | struct sockaddr_in sin; | |
1035 | int status; | |
33832034 | 1036 | char *hostname; |
0076d7b7 CL |
1037 | |
1038 | if (args->mount_server.version == 0) { | |
1039 | if (args->flags & NFS_MOUNT_VER3) | |
1040 | args->mount_server.version = NFS_MNT3_VERSION; | |
1041 | else | |
1042 | args->mount_server.version = NFS_MNT_VERSION; | |
1043 | } | |
1044 | ||
33832034 CL |
1045 | if (args->mount_server.hostname) |
1046 | hostname = args->mount_server.hostname; | |
1047 | else | |
1048 | hostname = args->nfs_server.hostname; | |
1049 | ||
0076d7b7 CL |
1050 | /* |
1051 | * Construct the mount server's address. | |
1052 | */ | |
1053 | if (args->mount_server.address.sin_addr.s_addr != INADDR_ANY) | |
1054 | sin = args->mount_server.address; | |
1055 | else | |
1056 | sin = args->nfs_server.address; | |
aad70007 JL |
1057 | /* |
1058 | * autobind will be used if mount_server.port == 0 | |
1059 | */ | |
04dcd6e3 | 1060 | nfs_set_port((struct sockaddr *)&sin, args->mount_server.port); |
0076d7b7 CL |
1061 | |
1062 | /* | |
1063 | * Now ask the mount server to map our export path | |
1064 | * to a file handle. | |
1065 | */ | |
1066 | status = nfs_mount((struct sockaddr *) &sin, | |
1067 | sizeof(sin), | |
33832034 | 1068 | hostname, |
0076d7b7 CL |
1069 | args->nfs_server.export_path, |
1070 | args->mount_server.version, | |
1071 | args->mount_server.protocol, | |
1072 | root_fh); | |
efd8340b CL |
1073 | if (status == 0) |
1074 | return 0; | |
0076d7b7 | 1075 | |
33832034 CL |
1076 | dfprintk(MOUNT, "NFS: unable to mount server %s, error %d", |
1077 | hostname, status); | |
0076d7b7 CL |
1078 | return status; |
1079 | } | |
1080 | ||
f7b422b1 | 1081 | /* |
54ceac45 DH |
1082 | * Validate the NFS2/NFS3 mount data |
1083 | * - fills in the mount root filehandle | |
136d558c CL |
1084 | * |
1085 | * For option strings, user space handles the following behaviors: | |
1086 | * | |
1087 | * + DNS: mapping server host name to IP address ("addr=" option) | |
1088 | * | |
1089 | * + failure mode: how to behave if a mount request can't be handled | |
1090 | * immediately ("fg/bg" option) | |
1091 | * | |
1092 | * + retry: how often to retry a mount request ("retry=" option) | |
1093 | * | |
1094 | * + breaking back: trying proto=udp after proto=tcp, v2 after v3, | |
1095 | * mountproto=tcp after mountproto=udp, and so on | |
f7b422b1 | 1096 | */ |
2283f8d6 TT |
1097 | static int nfs_validate_mount_data(void *options, |
1098 | struct nfs_parsed_mount_data *args, | |
136d558c CL |
1099 | struct nfs_fh *mntfh, |
1100 | const char *dev_name) | |
f7b422b1 | 1101 | { |
2283f8d6 | 1102 | struct nfs_mount_data *data = (struct nfs_mount_data *)options; |
136d558c | 1103 | |
f16c9603 RK |
1104 | memset(args, 0, sizeof(*args)); |
1105 | ||
5df36e78 CL |
1106 | if (data == NULL) |
1107 | goto out_no_data; | |
f7b422b1 | 1108 | |
2283f8d6 TT |
1109 | args->flags = (NFS_MOUNT_VER3 | NFS_MOUNT_TCP); |
1110 | args->rsize = NFS_MAX_FILE_IO_SIZE; | |
1111 | args->wsize = NFS_MAX_FILE_IO_SIZE; | |
1112 | args->timeo = 600; | |
1113 | args->retrans = 2; | |
1114 | args->acregmin = 3; | |
1115 | args->acregmax = 60; | |
1116 | args->acdirmin = 30; | |
1117 | args->acdirmax = 60; | |
0896a725 | 1118 | args->mount_server.protocol = XPRT_TRANSPORT_UDP; |
0896a725 | 1119 | args->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
2283f8d6 | 1120 | |
54ceac45 | 1121 | switch (data->version) { |
5df36e78 CL |
1122 | case 1: |
1123 | data->namlen = 0; | |
1124 | case 2: | |
1125 | data->bsize = 0; | |
1126 | case 3: | |
1127 | if (data->flags & NFS_MOUNT_VER3) | |
1128 | goto out_no_v3; | |
1129 | data->root.size = NFS2_FHSIZE; | |
1130 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
1131 | case 4: | |
1132 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1133 | goto out_no_sec; | |
1134 | case 5: | |
1135 | memset(data->context, 0, sizeof(data->context)); | |
1136 | case 6: | |
1137 | if (data->flags & NFS_MOUNT_VER3) | |
1138 | mntfh->size = data->root.size; | |
1139 | else | |
1140 | mntfh->size = NFS2_FHSIZE; | |
1141 | ||
1142 | if (mntfh->size > sizeof(mntfh->data)) | |
1143 | goto out_invalid_fh; | |
1144 | ||
1145 | memcpy(mntfh->data, data->root.data, mntfh->size); | |
1146 | if (mntfh->size < sizeof(mntfh->data)) | |
1147 | memset(mntfh->data + mntfh->size, 0, | |
1148 | sizeof(mntfh->data) - mntfh->size); | |
6e88e061 CL |
1149 | |
1150 | if (!nfs_verify_server_address((struct sockaddr *) &data->addr)) | |
1151 | goto out_no_address; | |
1152 | ||
2283f8d6 TT |
1153 | /* |
1154 | * Translate to nfs_parsed_mount_data, which nfs_fill_super | |
1155 | * can deal with. | |
1156 | */ | |
1157 | args->flags = data->flags; | |
1158 | args->rsize = data->rsize; | |
1159 | args->wsize = data->wsize; | |
1160 | args->flags = data->flags; | |
1161 | args->timeo = data->timeo; | |
1162 | args->retrans = data->retrans; | |
1163 | args->acregmin = data->acregmin; | |
1164 | args->acregmax = data->acregmax; | |
1165 | args->acdirmin = data->acdirmin; | |
1166 | args->acdirmax = data->acdirmax; | |
1167 | args->nfs_server.address = data->addr; | |
1168 | if (!(data->flags & NFS_MOUNT_TCP)) | |
0896a725 | 1169 | args->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
2283f8d6 TT |
1170 | /* N.B. caller will free nfs_server.hostname in all cases */ |
1171 | args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); | |
1172 | args->namlen = data->namlen; | |
1173 | args->bsize = data->bsize; | |
1174 | args->auth_flavors[0] = data->pseudoflavor; | |
5df36e78 | 1175 | break; |
136d558c CL |
1176 | default: { |
1177 | unsigned int len; | |
1178 | char *c; | |
1179 | int status; | |
136d558c | 1180 | |
2283f8d6 TT |
1181 | if (nfs_parse_mount_options((char *)options, args) == 0) |
1182 | return -EINVAL; | |
136d558c | 1183 | |
6e88e061 CL |
1184 | if (!nfs_verify_server_address((struct sockaddr *) |
1185 | &args->nfs_server.address)) | |
1186 | goto out_no_address; | |
1187 | ||
136d558c CL |
1188 | c = strchr(dev_name, ':'); |
1189 | if (c == NULL) | |
1190 | return -EINVAL; | |
350c73af | 1191 | len = c - dev_name; |
2283f8d6 TT |
1192 | /* N.B. caller will free nfs_server.hostname in all cases */ |
1193 | args->nfs_server.hostname = kstrndup(dev_name, len, GFP_KERNEL); | |
136d558c CL |
1194 | |
1195 | c++; | |
1196 | if (strlen(c) > NFS_MAXPATHLEN) | |
7d1cca72 | 1197 | return -ENAMETOOLONG; |
2283f8d6 | 1198 | args->nfs_server.export_path = c; |
136d558c | 1199 | |
2283f8d6 | 1200 | status = nfs_try_mount(args, mntfh); |
136d558c | 1201 | if (status) |
fdc6e2c8 | 1202 | return status; |
136d558c | 1203 | |
136d558c CL |
1204 | break; |
1205 | } | |
f7b422b1 | 1206 | } |
54ceac45 | 1207 | |
2283f8d6 TT |
1208 | if (!(args->flags & NFS_MOUNT_SECFLAVOUR)) |
1209 | args->auth_flavors[0] = RPC_AUTH_UNIX; | |
36b15c54 | 1210 | |
54ceac45 | 1211 | #ifndef CONFIG_NFS_V3 |
2283f8d6 | 1212 | if (args->flags & NFS_MOUNT_VER3) |
5df36e78 CL |
1213 | goto out_v3_not_compiled; |
1214 | #endif /* !CONFIG_NFS_V3 */ | |
f7b422b1 | 1215 | |
5df36e78 | 1216 | return 0; |
f7b422b1 | 1217 | |
5df36e78 CL |
1218 | out_no_data: |
1219 | dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); | |
1220 | return -EINVAL; | |
54ceac45 | 1221 | |
5df36e78 CL |
1222 | out_no_v3: |
1223 | dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", | |
1224 | data->version); | |
1225 | return -EINVAL; | |
f7b422b1 | 1226 | |
5df36e78 CL |
1227 | out_no_sec: |
1228 | dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); | |
1229 | return -EINVAL; | |
1230 | ||
5df36e78 CL |
1231 | #ifndef CONFIG_NFS_V3 |
1232 | out_v3_not_compiled: | |
1233 | dfprintk(MOUNT, "NFS: NFSv3 is not compiled into kernel\n"); | |
1234 | return -EPROTONOSUPPORT; | |
1235 | #endif /* !CONFIG_NFS_V3 */ | |
1236 | ||
1237 | out_no_address: | |
1238 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); | |
1239 | return -EINVAL; | |
1240 | ||
1241 | out_invalid_fh: | |
1242 | dfprintk(MOUNT, "NFS: invalid root filehandle\n"); | |
1243 | return -EINVAL; | |
f7b422b1 DH |
1244 | } |
1245 | ||
f7b422b1 | 1246 | /* |
54ceac45 | 1247 | * Initialise the common bits of the superblock |
f7b422b1 | 1248 | */ |
54ceac45 | 1249 | static inline void nfs_initialise_sb(struct super_block *sb) |
f7b422b1 | 1250 | { |
54ceac45 | 1251 | struct nfs_server *server = NFS_SB(sb); |
5006a76c | 1252 | |
54ceac45 | 1253 | sb->s_magic = NFS_SUPER_MAGIC; |
f7b422b1 | 1254 | |
54ceac45 DH |
1255 | /* We probably want something more informative here */ |
1256 | snprintf(sb->s_id, sizeof(sb->s_id), | |
1257 | "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev)); | |
5006a76c | 1258 | |
54ceac45 DH |
1259 | if (sb->s_blocksize == 0) |
1260 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
1261 | &sb->s_blocksize_bits); | |
f7b422b1 | 1262 | |
54ceac45 DH |
1263 | if (server->flags & NFS_MOUNT_NOAC) |
1264 | sb->s_flags |= MS_SYNCHRONOUS; | |
f7b422b1 | 1265 | |
54ceac45 | 1266 | nfs_super_set_maxbytes(sb, server->maxfilesize); |
f7b422b1 DH |
1267 | } |
1268 | ||
1269 | /* | |
54ceac45 | 1270 | * Finish setting up an NFS2/3 superblock |
f7b422b1 | 1271 | */ |
2283f8d6 TT |
1272 | static void nfs_fill_super(struct super_block *sb, |
1273 | struct nfs_parsed_mount_data *data) | |
f7b422b1 DH |
1274 | { |
1275 | struct nfs_server *server = NFS_SB(sb); | |
5006a76c | 1276 | |
54ceac45 DH |
1277 | sb->s_blocksize_bits = 0; |
1278 | sb->s_blocksize = 0; | |
1279 | if (data->bsize) | |
1280 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); | |
f7b422b1 | 1281 | |
54ceac45 DH |
1282 | if (server->flags & NFS_MOUNT_VER3) { |
1283 | /* The VFS shouldn't apply the umask to mode bits. We will do | |
1284 | * so ourselves when necessary. | |
1285 | */ | |
1286 | sb->s_flags |= MS_POSIXACL; | |
1287 | sb->s_time_gran = 1; | |
816724e6 | 1288 | } |
54ceac45 DH |
1289 | |
1290 | sb->s_op = &nfs_sops; | |
1291 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1292 | } |
1293 | ||
1294 | /* | |
54ceac45 | 1295 | * Finish setting up a cloned NFS2/3 superblock |
f7b422b1 | 1296 | */ |
54ceac45 DH |
1297 | static void nfs_clone_super(struct super_block *sb, |
1298 | const struct super_block *old_sb) | |
f7b422b1 | 1299 | { |
54ceac45 DH |
1300 | struct nfs_server *server = NFS_SB(sb); |
1301 | ||
1302 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; | |
1303 | sb->s_blocksize = old_sb->s_blocksize; | |
1304 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 1305 | |
f7b422b1 | 1306 | if (server->flags & NFS_MOUNT_VER3) { |
54ceac45 DH |
1307 | /* The VFS shouldn't apply the umask to mode bits. We will do |
1308 | * so ourselves when necessary. | |
f7b422b1 DH |
1309 | */ |
1310 | sb->s_flags |= MS_POSIXACL; | |
f7b422b1 | 1311 | sb->s_time_gran = 1; |
f7b422b1 DH |
1312 | } |
1313 | ||
54ceac45 DH |
1314 | sb->s_op = old_sb->s_op; |
1315 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1316 | } |
1317 | ||
275a5d24 TM |
1318 | #define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS) |
1319 | ||
1320 | static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags) | |
1321 | { | |
1322 | const struct nfs_server *a = s->s_fs_info; | |
1323 | const struct rpc_clnt *clnt_a = a->client; | |
1324 | const struct rpc_clnt *clnt_b = b->client; | |
1325 | ||
1326 | if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK)) | |
1327 | goto Ebusy; | |
1328 | if (a->nfs_client != b->nfs_client) | |
1329 | goto Ebusy; | |
1330 | if (a->flags != b->flags) | |
1331 | goto Ebusy; | |
1332 | if (a->wsize != b->wsize) | |
1333 | goto Ebusy; | |
1334 | if (a->rsize != b->rsize) | |
1335 | goto Ebusy; | |
1336 | if (a->acregmin != b->acregmin) | |
1337 | goto Ebusy; | |
1338 | if (a->acregmax != b->acregmax) | |
1339 | goto Ebusy; | |
1340 | if (a->acdirmin != b->acdirmin) | |
1341 | goto Ebusy; | |
1342 | if (a->acdirmax != b->acdirmax) | |
1343 | goto Ebusy; | |
1344 | if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) | |
1345 | goto Ebusy; | |
e89a5a43 | 1346 | return 1; |
275a5d24 | 1347 | Ebusy: |
e89a5a43 TM |
1348 | return 0; |
1349 | } | |
1350 | ||
1351 | struct nfs_sb_mountdata { | |
1352 | struct nfs_server *server; | |
1353 | int mntflags; | |
1354 | }; | |
1355 | ||
1356 | static int nfs_set_super(struct super_block *s, void *data) | |
1357 | { | |
1358 | struct nfs_sb_mountdata *sb_mntdata = data; | |
1359 | struct nfs_server *server = sb_mntdata->server; | |
1360 | int ret; | |
1361 | ||
1362 | s->s_flags = sb_mntdata->mntflags; | |
1363 | s->s_fs_info = server; | |
1364 | ret = set_anon_super(s, server); | |
1365 | if (ret == 0) | |
1366 | server->s_dev = s->s_dev; | |
1367 | return ret; | |
1368 | } | |
1369 | ||
fd00a8ff CL |
1370 | static int nfs_compare_super_address(struct nfs_server *server1, |
1371 | struct nfs_server *server2) | |
1372 | { | |
1373 | struct sockaddr *sap1, *sap2; | |
1374 | ||
1375 | sap1 = (struct sockaddr *)&server1->nfs_client->cl_addr; | |
1376 | sap2 = (struct sockaddr *)&server2->nfs_client->cl_addr; | |
1377 | ||
1378 | if (sap1->sa_family != sap2->sa_family) | |
1379 | return 0; | |
1380 | ||
1381 | switch (sap1->sa_family) { | |
1382 | case AF_INET: { | |
1383 | struct sockaddr_in *sin1 = (struct sockaddr_in *)sap1; | |
1384 | struct sockaddr_in *sin2 = (struct sockaddr_in *)sap2; | |
1385 | if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) | |
1386 | return 0; | |
1387 | if (sin1->sin_port != sin2->sin_port) | |
1388 | return 0; | |
1389 | break; | |
1390 | } | |
1391 | case AF_INET6: { | |
1392 | struct sockaddr_in6 *sin1 = (struct sockaddr_in6 *)sap1; | |
1393 | struct sockaddr_in6 *sin2 = (struct sockaddr_in6 *)sap2; | |
1394 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) | |
1395 | return 0; | |
1396 | if (sin1->sin6_port != sin2->sin6_port) | |
1397 | return 0; | |
1398 | break; | |
1399 | } | |
1400 | default: | |
1401 | return 0; | |
1402 | } | |
1403 | ||
1404 | return 1; | |
1405 | } | |
1406 | ||
e89a5a43 TM |
1407 | static int nfs_compare_super(struct super_block *sb, void *data) |
1408 | { | |
1409 | struct nfs_sb_mountdata *sb_mntdata = data; | |
1410 | struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb); | |
1411 | int mntflags = sb_mntdata->mntflags; | |
1412 | ||
fd00a8ff | 1413 | if (!nfs_compare_super_address(old, server)) |
e89a5a43 TM |
1414 | return 0; |
1415 | /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */ | |
1416 | if (old->flags & NFS_MOUNT_UNSHARED) | |
1417 | return 0; | |
1418 | if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0) | |
1419 | return 0; | |
1420 | return nfs_compare_mount_options(sb, server, mntflags); | |
275a5d24 TM |
1421 | } |
1422 | ||
816724e6 TM |
1423 | static int nfs_get_sb(struct file_system_type *fs_type, |
1424 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
f7b422b1 | 1425 | { |
f7b422b1 DH |
1426 | struct nfs_server *server = NULL; |
1427 | struct super_block *s; | |
54ceac45 | 1428 | struct nfs_fh mntfh; |
2283f8d6 | 1429 | struct nfs_parsed_mount_data data; |
54ceac45 | 1430 | struct dentry *mntroot; |
75180df2 | 1431 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1432 | struct nfs_sb_mountdata sb_mntdata = { |
1433 | .mntflags = flags, | |
1434 | }; | |
54ceac45 | 1435 | int error; |
f7b422b1 | 1436 | |
54ceac45 | 1437 | /* Validate the mount data */ |
2283f8d6 | 1438 | error = nfs_validate_mount_data(raw_data, &data, &mntfh, dev_name); |
54ceac45 | 1439 | if (error < 0) |
0655960f | 1440 | goto out; |
f7b422b1 | 1441 | |
54ceac45 | 1442 | /* Get a volume representation */ |
2283f8d6 | 1443 | server = nfs_create_server(&data, &mntfh); |
54ceac45 DH |
1444 | if (IS_ERR(server)) { |
1445 | error = PTR_ERR(server); | |
0655960f | 1446 | goto out; |
f7b422b1 | 1447 | } |
e89a5a43 | 1448 | sb_mntdata.server = server; |
f7b422b1 | 1449 | |
75180df2 TM |
1450 | if (server->flags & NFS_MOUNT_UNSHARED) |
1451 | compare_super = NULL; | |
1452 | ||
54ceac45 | 1453 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1454 | s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
1455 | if (IS_ERR(s)) { |
1456 | error = PTR_ERR(s); | |
54ceac45 | 1457 | goto out_err_nosb; |
816724e6 TM |
1458 | } |
1459 | ||
54ceac45 DH |
1460 | if (s->s_fs_info != server) { |
1461 | nfs_free_server(server); | |
1462 | server = NULL; | |
1463 | } | |
f7b422b1 | 1464 | |
54ceac45 DH |
1465 | if (!s->s_root) { |
1466 | /* initial superblock/root creation */ | |
2283f8d6 | 1467 | nfs_fill_super(s, &data); |
54ceac45 | 1468 | } |
f7b422b1 | 1469 | |
54ceac45 DH |
1470 | mntroot = nfs_get_root(s, &mntfh); |
1471 | if (IS_ERR(mntroot)) { | |
1472 | error = PTR_ERR(mntroot); | |
1473 | goto error_splat_super; | |
f7b422b1 | 1474 | } |
816724e6 | 1475 | |
54ceac45 DH |
1476 | s->s_flags |= MS_ACTIVE; |
1477 | mnt->mnt_sb = s; | |
1478 | mnt->mnt_root = mntroot; | |
0655960f CL |
1479 | error = 0; |
1480 | ||
1481 | out: | |
2283f8d6 | 1482 | kfree(data.nfs_server.hostname); |
33832034 | 1483 | kfree(data.mount_server.hostname); |
0655960f | 1484 | return error; |
816724e6 | 1485 | |
54ceac45 DH |
1486 | out_err_nosb: |
1487 | nfs_free_server(server); | |
0655960f | 1488 | goto out; |
54ceac45 DH |
1489 | |
1490 | error_splat_super: | |
1491 | up_write(&s->s_umount); | |
1492 | deactivate_super(s); | |
0655960f | 1493 | goto out; |
f7b422b1 DH |
1494 | } |
1495 | ||
54ceac45 DH |
1496 | /* |
1497 | * Destroy an NFS2/3 superblock | |
1498 | */ | |
f7b422b1 DH |
1499 | static void nfs_kill_super(struct super_block *s) |
1500 | { | |
1501 | struct nfs_server *server = NFS_SB(s); | |
1502 | ||
1503 | kill_anon_super(s); | |
54ceac45 | 1504 | nfs_free_server(server); |
f7b422b1 DH |
1505 | } |
1506 | ||
54ceac45 DH |
1507 | /* |
1508 | * Clone an NFS2/3 server record on xdev traversal (FSID-change) | |
1509 | */ | |
1510 | static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags, | |
1511 | const char *dev_name, void *raw_data, | |
1512 | struct vfsmount *mnt) | |
f7b422b1 DH |
1513 | { |
1514 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
1515 | struct super_block *s; |
1516 | struct nfs_server *server; | |
1517 | struct dentry *mntroot; | |
75180df2 | 1518 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1519 | struct nfs_sb_mountdata sb_mntdata = { |
1520 | .mntflags = flags, | |
1521 | }; | |
54ceac45 | 1522 | int error; |
f7b422b1 | 1523 | |
54ceac45 | 1524 | dprintk("--> nfs_xdev_get_sb()\n"); |
f7b422b1 | 1525 | |
54ceac45 DH |
1526 | /* create a new volume representation */ |
1527 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
1528 | if (IS_ERR(server)) { | |
1529 | error = PTR_ERR(server); | |
1530 | goto out_err_noserver; | |
1531 | } | |
e89a5a43 | 1532 | sb_mntdata.server = server; |
8fa5c000 | 1533 | |
75180df2 TM |
1534 | if (server->flags & NFS_MOUNT_UNSHARED) |
1535 | compare_super = NULL; | |
1536 | ||
54ceac45 | 1537 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1538 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
1539 | if (IS_ERR(s)) { |
1540 | error = PTR_ERR(s); | |
1541 | goto out_err_nosb; | |
1542 | } | |
5006a76c | 1543 | |
54ceac45 DH |
1544 | if (s->s_fs_info != server) { |
1545 | nfs_free_server(server); | |
1546 | server = NULL; | |
f7b422b1 | 1547 | } |
24c8dbbb | 1548 | |
54ceac45 DH |
1549 | if (!s->s_root) { |
1550 | /* initial superblock/root creation */ | |
54ceac45 DH |
1551 | nfs_clone_super(s, data->sb); |
1552 | } | |
f7b422b1 | 1553 | |
54ceac45 DH |
1554 | mntroot = nfs_get_root(s, data->fh); |
1555 | if (IS_ERR(mntroot)) { | |
1556 | error = PTR_ERR(mntroot); | |
1557 | goto error_splat_super; | |
f7b422b1 | 1558 | } |
e9cc6c23 | 1559 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
4c1fe2f7 NB |
1560 | dput(mntroot); |
1561 | error = -ESTALE; | |
1562 | goto error_splat_super; | |
1563 | } | |
f7b422b1 | 1564 | |
54ceac45 DH |
1565 | s->s_flags |= MS_ACTIVE; |
1566 | mnt->mnt_sb = s; | |
1567 | mnt->mnt_root = mntroot; | |
f7b422b1 | 1568 | |
54ceac45 DH |
1569 | dprintk("<-- nfs_xdev_get_sb() = 0\n"); |
1570 | return 0; | |
24c8dbbb | 1571 | |
54ceac45 DH |
1572 | out_err_nosb: |
1573 | nfs_free_server(server); | |
1574 | out_err_noserver: | |
1575 | dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error); | |
1576 | return error; | |
f7b422b1 | 1577 | |
54ceac45 DH |
1578 | error_splat_super: |
1579 | up_write(&s->s_umount); | |
1580 | deactivate_super(s); | |
1581 | dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error); | |
1582 | return error; | |
f7b422b1 DH |
1583 | } |
1584 | ||
54ceac45 DH |
1585 | #ifdef CONFIG_NFS_V4 |
1586 | ||
f7b422b1 | 1587 | /* |
54ceac45 | 1588 | * Finish setting up a cloned NFS4 superblock |
f7b422b1 | 1589 | */ |
54ceac45 DH |
1590 | static void nfs4_clone_super(struct super_block *sb, |
1591 | const struct super_block *old_sb) | |
f7b422b1 | 1592 | { |
54ceac45 DH |
1593 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; |
1594 | sb->s_blocksize = old_sb->s_blocksize; | |
1595 | sb->s_maxbytes = old_sb->s_maxbytes; | |
f7b422b1 | 1596 | sb->s_time_gran = 1; |
54ceac45 DH |
1597 | sb->s_op = old_sb->s_op; |
1598 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1599 | } |
1600 | ||
54ceac45 DH |
1601 | /* |
1602 | * Set up an NFS4 superblock | |
1603 | */ | |
1604 | static void nfs4_fill_super(struct super_block *sb) | |
f7b422b1 | 1605 | { |
54ceac45 DH |
1606 | sb->s_time_gran = 1; |
1607 | sb->s_op = &nfs4_sops; | |
1608 | nfs_initialise_sb(sb); | |
f7b422b1 DH |
1609 | } |
1610 | ||
0d0f0c19 CL |
1611 | /* |
1612 | * If the user didn't specify a port, set the port number to | |
1613 | * the NFS version 4 default port. | |
1614 | */ | |
1615 | static void nfs4_default_port(struct sockaddr *sap) | |
1616 | { | |
1617 | switch (sap->sa_family) { | |
1618 | case AF_INET: { | |
1619 | struct sockaddr_in *ap = (struct sockaddr_in *)sap; | |
1620 | if (ap->sin_port == 0) | |
1621 | ap->sin_port = htons(NFS_PORT); | |
1622 | break; | |
1623 | } | |
1624 | case AF_INET6: { | |
1625 | struct sockaddr_in6 *ap = (struct sockaddr_in6 *)sap; | |
1626 | if (ap->sin6_port == 0) | |
1627 | ap->sin6_port = htons(NFS_PORT); | |
1628 | break; | |
1629 | } | |
1630 | } | |
1631 | } | |
1632 | ||
f0768ebd CL |
1633 | /* |
1634 | * Validate NFSv4 mount options | |
1635 | */ | |
91ea40b9 TT |
1636 | static int nfs4_validate_mount_data(void *options, |
1637 | struct nfs_parsed_mount_data *args, | |
1638 | const char *dev_name) | |
f0768ebd | 1639 | { |
91ea40b9 | 1640 | struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; |
f0768ebd CL |
1641 | char *c; |
1642 | ||
f16c9603 RK |
1643 | memset(args, 0, sizeof(*args)); |
1644 | ||
f0768ebd CL |
1645 | if (data == NULL) |
1646 | goto out_no_data; | |
1647 | ||
91ea40b9 TT |
1648 | args->rsize = NFS_MAX_FILE_IO_SIZE; |
1649 | args->wsize = NFS_MAX_FILE_IO_SIZE; | |
1650 | args->timeo = 600; | |
1651 | args->retrans = 2; | |
1652 | args->acregmin = 3; | |
1653 | args->acregmax = 60; | |
1654 | args->acdirmin = 30; | |
1655 | args->acdirmax = 60; | |
0896a725 | 1656 | args->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
91ea40b9 | 1657 | |
f0768ebd CL |
1658 | switch (data->version) { |
1659 | case 1: | |
91ea40b9 | 1660 | if (data->host_addrlen != sizeof(args->nfs_server.address)) |
f0768ebd | 1661 | goto out_no_address; |
91ea40b9 TT |
1662 | if (copy_from_user(&args->nfs_server.address, |
1663 | data->host_addr, | |
20c71f5e | 1664 | sizeof(args->nfs_server.address))) |
f0768ebd | 1665 | return -EFAULT; |
91ea40b9 TT |
1666 | if (!nfs_verify_server_address((struct sockaddr *) |
1667 | &args->nfs_server.address)) | |
f0768ebd CL |
1668 | goto out_no_address; |
1669 | ||
0d0f0c19 CL |
1670 | nfs4_default_port((struct sockaddr *) |
1671 | &args->nfs_server.address); | |
1672 | ||
f0768ebd CL |
1673 | switch (data->auth_flavourlen) { |
1674 | case 0: | |
91ea40b9 | 1675 | args->auth_flavors[0] = RPC_AUTH_UNIX; |
f0768ebd CL |
1676 | break; |
1677 | case 1: | |
20c71f5e | 1678 | if (copy_from_user(&args->auth_flavors[0], |
91ea40b9 | 1679 | data->auth_flavours, |
20c71f5e | 1680 | sizeof(args->auth_flavors[0]))) |
f0768ebd CL |
1681 | return -EFAULT; |
1682 | break; | |
1683 | default: | |
1684 | goto out_inval_auth; | |
1685 | } | |
1686 | ||
1687 | c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); | |
1688 | if (IS_ERR(c)) | |
1689 | return PTR_ERR(c); | |
91ea40b9 | 1690 | args->nfs_server.hostname = c; |
f0768ebd CL |
1691 | |
1692 | c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); | |
1693 | if (IS_ERR(c)) | |
1694 | return PTR_ERR(c); | |
91ea40b9 TT |
1695 | args->nfs_server.export_path = c; |
1696 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); | |
f0768ebd CL |
1697 | |
1698 | c = strndup_user(data->client_addr.data, 16); | |
1699 | if (IS_ERR(c)) | |
1700 | return PTR_ERR(c); | |
91ea40b9 TT |
1701 | args->client_address = c; |
1702 | ||
1703 | /* | |
1704 | * Translate to nfs_parsed_mount_data, which nfs4_fill_super | |
1705 | * can deal with. | |
1706 | */ | |
1707 | ||
1708 | args->flags = data->flags & NFS4_MOUNT_FLAGMASK; | |
1709 | args->rsize = data->rsize; | |
1710 | args->wsize = data->wsize; | |
1711 | args->timeo = data->timeo; | |
1712 | args->retrans = data->retrans; | |
1713 | args->acregmin = data->acregmin; | |
1714 | args->acregmax = data->acregmax; | |
1715 | args->acdirmin = data->acdirmin; | |
1716 | args->acdirmax = data->acdirmax; | |
1717 | args->nfs_server.protocol = data->proto; | |
f0768ebd CL |
1718 | |
1719 | break; | |
80071225 CL |
1720 | default: { |
1721 | unsigned int len; | |
91ea40b9 TT |
1722 | |
1723 | if (nfs_parse_mount_options((char *)options, args) == 0) | |
80071225 CL |
1724 | return -EINVAL; |
1725 | ||
1726 | if (!nfs_verify_server_address((struct sockaddr *) | |
91ea40b9 | 1727 | &args->nfs_server.address)) |
80071225 | 1728 | return -EINVAL; |
80071225 | 1729 | |
0d0f0c19 CL |
1730 | nfs4_default_port((struct sockaddr *) |
1731 | &args->nfs_server.address); | |
1732 | ||
91ea40b9 | 1733 | switch (args->auth_flavor_len) { |
80071225 | 1734 | case 0: |
91ea40b9 | 1735 | args->auth_flavors[0] = RPC_AUTH_UNIX; |
80071225 CL |
1736 | break; |
1737 | case 1: | |
80071225 CL |
1738 | break; |
1739 | default: | |
1740 | goto out_inval_auth; | |
1741 | } | |
1742 | ||
80071225 CL |
1743 | /* |
1744 | * Split "dev_name" into "hostname:mntpath". | |
1745 | */ | |
1746 | c = strchr(dev_name, ':'); | |
1747 | if (c == NULL) | |
1748 | return -EINVAL; | |
1749 | /* while calculating len, pretend ':' is '\0' */ | |
1750 | len = c - dev_name; | |
1751 | if (len > NFS4_MAXNAMLEN) | |
7d1cca72 | 1752 | return -ENAMETOOLONG; |
6a0ed1de CL |
1753 | /* N.B. caller will free nfs_server.hostname in all cases */ |
1754 | args->nfs_server.hostname = kstrndup(dev_name, len, GFP_KERNEL); | |
80071225 CL |
1755 | |
1756 | c++; /* step over the ':' */ | |
1757 | len = strlen(c); | |
1758 | if (len > NFS4_MAXPATHLEN) | |
7d1cca72 | 1759 | return -ENAMETOOLONG; |
6a0ed1de | 1760 | args->nfs_server.export_path = kstrndup(c, len, GFP_KERNEL); |
80071225 | 1761 | |
6a0ed1de | 1762 | dprintk("NFS: MNTPATH: '%s'\n", args->nfs_server.export_path); |
80071225 | 1763 | |
91ea40b9 | 1764 | if (args->client_address == NULL) |
0a87cf12 JL |
1765 | goto out_no_client_address; |
1766 | ||
80071225 CL |
1767 | break; |
1768 | } | |
f0768ebd CL |
1769 | } |
1770 | ||
1771 | return 0; | |
1772 | ||
1773 | out_no_data: | |
1774 | dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); | |
1775 | return -EINVAL; | |
1776 | ||
1777 | out_inval_auth: | |
1778 | dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", | |
1779 | data->auth_flavourlen); | |
1780 | return -EINVAL; | |
1781 | ||
1782 | out_no_address: | |
1783 | dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); | |
1784 | return -EINVAL; | |
0a87cf12 JL |
1785 | |
1786 | out_no_client_address: | |
1787 | dfprintk(MOUNT, "NFS4: mount program didn't pass callback address\n"); | |
1788 | return -EINVAL; | |
f0768ebd CL |
1789 | } |
1790 | ||
54ceac45 DH |
1791 | /* |
1792 | * Get the superblock for an NFS4 mountpoint | |
1793 | */ | |
816724e6 TM |
1794 | static int nfs4_get_sb(struct file_system_type *fs_type, |
1795 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
f7b422b1 | 1796 | { |
91ea40b9 | 1797 | struct nfs_parsed_mount_data data; |
54ceac45 DH |
1798 | struct super_block *s; |
1799 | struct nfs_server *server; | |
54ceac45 DH |
1800 | struct nfs_fh mntfh; |
1801 | struct dentry *mntroot; | |
75180df2 | 1802 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1803 | struct nfs_sb_mountdata sb_mntdata = { |
1804 | .mntflags = flags, | |
1805 | }; | |
54ceac45 | 1806 | int error; |
f7b422b1 | 1807 | |
f0768ebd | 1808 | /* Validate the mount data */ |
91ea40b9 | 1809 | error = nfs4_validate_mount_data(raw_data, &data, dev_name); |
f0768ebd CL |
1810 | if (error < 0) |
1811 | goto out; | |
f7b422b1 | 1812 | |
54ceac45 | 1813 | /* Get a volume representation */ |
91ea40b9 | 1814 | server = nfs4_create_server(&data, &mntfh); |
54ceac45 DH |
1815 | if (IS_ERR(server)) { |
1816 | error = PTR_ERR(server); | |
29eb981a | 1817 | goto out; |
f7b422b1 | 1818 | } |
e89a5a43 | 1819 | sb_mntdata.server = server; |
f7b422b1 | 1820 | |
75180df2 TM |
1821 | if (server->flags & NFS4_MOUNT_UNSHARED) |
1822 | compare_super = NULL; | |
1823 | ||
54ceac45 | 1824 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1825 | s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata); |
816724e6 TM |
1826 | if (IS_ERR(s)) { |
1827 | error = PTR_ERR(s); | |
f7b422b1 | 1828 | goto out_free; |
816724e6 TM |
1829 | } |
1830 | ||
5dd3177a TM |
1831 | if (s->s_fs_info != server) { |
1832 | nfs_free_server(server); | |
1833 | server = NULL; | |
1834 | } | |
1835 | ||
54ceac45 DH |
1836 | if (!s->s_root) { |
1837 | /* initial superblock/root creation */ | |
54ceac45 | 1838 | nfs4_fill_super(s); |
54ceac45 | 1839 | } |
f7b422b1 | 1840 | |
54ceac45 DH |
1841 | mntroot = nfs4_get_root(s, &mntfh); |
1842 | if (IS_ERR(mntroot)) { | |
1843 | error = PTR_ERR(mntroot); | |
1844 | goto error_splat_super; | |
f7b422b1 | 1845 | } |
54ceac45 | 1846 | |
f7b422b1 | 1847 | s->s_flags |= MS_ACTIVE; |
54ceac45 DH |
1848 | mnt->mnt_sb = s; |
1849 | mnt->mnt_root = mntroot; | |
29eb981a CL |
1850 | error = 0; |
1851 | ||
1852 | out: | |
91ea40b9 TT |
1853 | kfree(data.client_address); |
1854 | kfree(data.nfs_server.export_path); | |
1855 | kfree(data.nfs_server.hostname); | |
29eb981a | 1856 | return error; |
54ceac45 | 1857 | |
f7b422b1 | 1858 | out_free: |
54ceac45 | 1859 | nfs_free_server(server); |
29eb981a | 1860 | goto out; |
54ceac45 DH |
1861 | |
1862 | error_splat_super: | |
1863 | up_write(&s->s_umount); | |
1864 | deactivate_super(s); | |
29eb981a | 1865 | goto out; |
f7b422b1 DH |
1866 | } |
1867 | ||
1868 | static void nfs4_kill_super(struct super_block *sb) | |
1869 | { | |
1870 | struct nfs_server *server = NFS_SB(sb); | |
1871 | ||
1872 | nfs_return_all_delegations(sb); | |
1873 | kill_anon_super(sb); | |
1874 | ||
1875 | nfs4_renewd_prepare_shutdown(server); | |
54ceac45 | 1876 | nfs_free_server(server); |
f7b422b1 DH |
1877 | } |
1878 | ||
1879 | /* | |
54ceac45 | 1880 | * Clone an NFS4 server record on xdev traversal (FSID-change) |
f7b422b1 | 1881 | */ |
54ceac45 DH |
1882 | static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags, |
1883 | const char *dev_name, void *raw_data, | |
1884 | struct vfsmount *mnt) | |
f7b422b1 | 1885 | { |
54ceac45 DH |
1886 | struct nfs_clone_mount *data = raw_data; |
1887 | struct super_block *s; | |
1888 | struct nfs_server *server; | |
1889 | struct dentry *mntroot; | |
75180df2 | 1890 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1891 | struct nfs_sb_mountdata sb_mntdata = { |
1892 | .mntflags = flags, | |
1893 | }; | |
54ceac45 | 1894 | int error; |
f7b422b1 | 1895 | |
54ceac45 | 1896 | dprintk("--> nfs4_xdev_get_sb()\n"); |
f7b422b1 | 1897 | |
54ceac45 DH |
1898 | /* create a new volume representation */ |
1899 | server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); | |
1900 | if (IS_ERR(server)) { | |
1901 | error = PTR_ERR(server); | |
1902 | goto out_err_noserver; | |
f7b422b1 | 1903 | } |
e89a5a43 | 1904 | sb_mntdata.server = server; |
f7b422b1 | 1905 | |
75180df2 TM |
1906 | if (server->flags & NFS4_MOUNT_UNSHARED) |
1907 | compare_super = NULL; | |
1908 | ||
54ceac45 | 1909 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1910 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
1911 | if (IS_ERR(s)) { |
1912 | error = PTR_ERR(s); | |
1913 | goto out_err_nosb; | |
f7b422b1 | 1914 | } |
f7b422b1 | 1915 | |
54ceac45 DH |
1916 | if (s->s_fs_info != server) { |
1917 | nfs_free_server(server); | |
1918 | server = NULL; | |
1919 | } | |
f7b422b1 | 1920 | |
54ceac45 DH |
1921 | if (!s->s_root) { |
1922 | /* initial superblock/root creation */ | |
54ceac45 DH |
1923 | nfs4_clone_super(s, data->sb); |
1924 | } | |
f7b422b1 | 1925 | |
54ceac45 DH |
1926 | mntroot = nfs4_get_root(s, data->fh); |
1927 | if (IS_ERR(mntroot)) { | |
1928 | error = PTR_ERR(mntroot); | |
1929 | goto error_splat_super; | |
1930 | } | |
e9cc6c23 TM |
1931 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
1932 | dput(mntroot); | |
1933 | error = -ESTALE; | |
1934 | goto error_splat_super; | |
1935 | } | |
f7b422b1 | 1936 | |
54ceac45 DH |
1937 | s->s_flags |= MS_ACTIVE; |
1938 | mnt->mnt_sb = s; | |
1939 | mnt->mnt_root = mntroot; | |
1940 | ||
1941 | dprintk("<-- nfs4_xdev_get_sb() = 0\n"); | |
1942 | return 0; | |
1943 | ||
1944 | out_err_nosb: | |
1945 | nfs_free_server(server); | |
1946 | out_err_noserver: | |
1947 | dprintk("<-- nfs4_xdev_get_sb() = %d [error]\n", error); | |
1948 | return error; | |
1949 | ||
1950 | error_splat_super: | |
1951 | up_write(&s->s_umount); | |
1952 | deactivate_super(s); | |
1953 | dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error); | |
1954 | return error; | |
f7b422b1 DH |
1955 | } |
1956 | ||
54ceac45 DH |
1957 | /* |
1958 | * Create an NFS4 server record on referral traversal | |
1959 | */ | |
1960 | static int nfs4_referral_get_sb(struct file_system_type *fs_type, int flags, | |
1961 | const char *dev_name, void *raw_data, | |
1962 | struct vfsmount *mnt) | |
f7b422b1 DH |
1963 | { |
1964 | struct nfs_clone_mount *data = raw_data; | |
54ceac45 DH |
1965 | struct super_block *s; |
1966 | struct nfs_server *server; | |
1967 | struct dentry *mntroot; | |
1968 | struct nfs_fh mntfh; | |
75180df2 | 1969 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
1970 | struct nfs_sb_mountdata sb_mntdata = { |
1971 | .mntflags = flags, | |
1972 | }; | |
54ceac45 DH |
1973 | int error; |
1974 | ||
1975 | dprintk("--> nfs4_referral_get_sb()\n"); | |
1976 | ||
1977 | /* create a new volume representation */ | |
1978 | server = nfs4_create_referral_server(data, &mntfh); | |
1979 | if (IS_ERR(server)) { | |
1980 | error = PTR_ERR(server); | |
1981 | goto out_err_noserver; | |
1982 | } | |
e89a5a43 | 1983 | sb_mntdata.server = server; |
54ceac45 | 1984 | |
75180df2 TM |
1985 | if (server->flags & NFS4_MOUNT_UNSHARED) |
1986 | compare_super = NULL; | |
1987 | ||
54ceac45 | 1988 | /* Get a superblock - note that we may end up sharing one that already exists */ |
e89a5a43 | 1989 | s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); |
54ceac45 DH |
1990 | if (IS_ERR(s)) { |
1991 | error = PTR_ERR(s); | |
1992 | goto out_err_nosb; | |
1993 | } | |
1994 | ||
1995 | if (s->s_fs_info != server) { | |
1996 | nfs_free_server(server); | |
1997 | server = NULL; | |
1998 | } | |
1999 | ||
2000 | if (!s->s_root) { | |
2001 | /* initial superblock/root creation */ | |
54ceac45 DH |
2002 | nfs4_fill_super(s); |
2003 | } | |
2004 | ||
f2d0d85e | 2005 | mntroot = nfs4_get_root(s, &mntfh); |
54ceac45 DH |
2006 | if (IS_ERR(mntroot)) { |
2007 | error = PTR_ERR(mntroot); | |
2008 | goto error_splat_super; | |
2009 | } | |
e9cc6c23 TM |
2010 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { |
2011 | dput(mntroot); | |
2012 | error = -ESTALE; | |
2013 | goto error_splat_super; | |
2014 | } | |
54ceac45 DH |
2015 | |
2016 | s->s_flags |= MS_ACTIVE; | |
2017 | mnt->mnt_sb = s; | |
2018 | mnt->mnt_root = mntroot; | |
2019 | ||
2020 | dprintk("<-- nfs4_referral_get_sb() = 0\n"); | |
2021 | return 0; | |
2022 | ||
2023 | out_err_nosb: | |
2024 | nfs_free_server(server); | |
2025 | out_err_noserver: | |
2026 | dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error); | |
2027 | return error; | |
2028 | ||
2029 | error_splat_super: | |
2030 | up_write(&s->s_umount); | |
2031 | deactivate_super(s); | |
2032 | dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error); | |
2033 | return error; | |
f7b422b1 DH |
2034 | } |
2035 | ||
54ceac45 | 2036 | #endif /* CONFIG_NFS_V4 */ |