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Commit | Line | Data |
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f7b422b1 DH |
1 | /* |
2 | * linux/fs/nfs/super.c | |
3 | * | |
4 | * Copyright (C) 1992 Rick Sladkey | |
5 | * | |
6 | * nfs superblock handling functions | |
7 | * | |
526719ba | 8 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
f7b422b1 DH |
9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
10 | * | |
11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
12 | * J.S.Peatfield@damtp.cam.ac.uk | |
13 | * | |
14 | * Split from inode.c by David Howells <dhowells@redhat.com> | |
15 | * | |
54ceac45 DH |
16 | * - superblocks are indexed on server only - all inodes, dentries, etc. associated with a |
17 | * particular server are held in the same superblock | |
18 | * - NFS superblocks can have several effective roots to the dentry tree | |
19 | * - directory type roots are spliced into the tree when a path from one root reaches the root | |
20 | * of another (see nfs_lookup()) | |
f7b422b1 DH |
21 | */ |
22 | ||
f7b422b1 DH |
23 | #include <linux/module.h> |
24 | #include <linux/init.h> | |
25 | ||
26 | #include <linux/time.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/string.h> | |
30 | #include <linux/stat.h> | |
31 | #include <linux/errno.h> | |
32 | #include <linux/unistd.h> | |
33 | #include <linux/sunrpc/clnt.h> | |
5976687a | 34 | #include <linux/sunrpc/addr.h> |
f7b422b1 DH |
35 | #include <linux/sunrpc/stats.h> |
36 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 37 | #include <linux/sunrpc/xprtsock.h> |
2cf7ff7a | 38 | #include <linux/sunrpc/xprtrdma.h> |
f7b422b1 DH |
39 | #include <linux/nfs_fs.h> |
40 | #include <linux/nfs_mount.h> | |
41 | #include <linux/nfs4_mount.h> | |
42 | #include <linux/lockd/bind.h> | |
f7b422b1 DH |
43 | #include <linux/seq_file.h> |
44 | #include <linux/mount.h> | |
c02d7adf | 45 | #include <linux/namei.h> |
f7b422b1 DH |
46 | #include <linux/nfs_idmap.h> |
47 | #include <linux/vfs.h> | |
48 | #include <linux/inet.h> | |
fd00a8ff | 49 | #include <linux/in6.h> |
5a0e3ad6 | 50 | #include <linux/slab.h> |
fd00a8ff | 51 | #include <net/ipv6.h> |
d8e7748a | 52 | #include <linux/netdevice.h> |
f7b422b1 | 53 | #include <linux/nfs_xdr.h> |
b5d5dfbd | 54 | #include <linux/magic.h> |
bf0fd768 | 55 | #include <linux/parser.h> |
e50a7a1a | 56 | #include <linux/nsproxy.h> |
2446ab60 | 57 | #include <linux/rcupdate.h> |
f7b422b1 | 58 | |
f7b422b1 DH |
59 | #include <asm/uaccess.h> |
60 | ||
61 | #include "nfs4_fs.h" | |
62 | #include "callback.h" | |
63 | #include "delegation.h" | |
64 | #include "iostat.h" | |
65 | #include "internal.h" | |
08734048 | 66 | #include "fscache.h" |
76e697ba | 67 | #include "nfs4session.h" |
ae50c0b5 | 68 | #include "pnfs.h" |
ab7017a3 | 69 | #include "nfs.h" |
f7b422b1 DH |
70 | |
71 | #define NFSDBG_FACILITY NFSDBG_VFS | |
b72e4f42 | 72 | #define NFS_TEXT_DATA 1 |
f7b422b1 | 73 | |
1c606fb7 | 74 | #if IS_ENABLED(CONFIG_NFS_V3) |
1e657bd5 PZ |
75 | #define NFS_DEFAULT_VERSION 3 |
76 | #else | |
77 | #define NFS_DEFAULT_VERSION 2 | |
78 | #endif | |
79 | ||
bf0fd768 CL |
80 | enum { |
81 | /* Mount options that take no arguments */ | |
82 | Opt_soft, Opt_hard, | |
bf0fd768 CL |
83 | Opt_posix, Opt_noposix, |
84 | Opt_cto, Opt_nocto, | |
85 | Opt_ac, Opt_noac, | |
86 | Opt_lock, Opt_nolock, | |
2cf7ff7a | 87 | Opt_udp, Opt_tcp, Opt_rdma, |
bf0fd768 CL |
88 | Opt_acl, Opt_noacl, |
89 | Opt_rdirplus, Opt_nordirplus, | |
75180df2 | 90 | Opt_sharecache, Opt_nosharecache, |
d740351b | 91 | Opt_resvport, Opt_noresvport, |
b797cac7 | 92 | Opt_fscache, Opt_nofscache, |
89652617 | 93 | Opt_migration, Opt_nomigration, |
bf0fd768 CL |
94 | |
95 | /* Mount options that take integer arguments */ | |
96 | Opt_port, | |
97 | Opt_rsize, Opt_wsize, Opt_bsize, | |
98 | Opt_timeo, Opt_retrans, | |
99 | Opt_acregmin, Opt_acregmax, | |
100 | Opt_acdirmin, Opt_acdirmax, | |
101 | Opt_actimeo, | |
102 | Opt_namelen, | |
103 | Opt_mountport, | |
e887cbcf | 104 | Opt_mountvers, |
3fd5be9e | 105 | Opt_minorversion, |
bf0fd768 CL |
106 | |
107 | /* Mount options that take string arguments */ | |
0d71b058 | 108 | Opt_nfsvers, |
33832034 | 109 | Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost, |
0ac83779 | 110 | Opt_addr, Opt_mountaddr, Opt_clientaddr, |
7973c1f1 | 111 | Opt_lookupcache, |
b797cac7 | 112 | Opt_fscache_uniq, |
5eebde23 | 113 | Opt_local_lock, |
bf0fd768 | 114 | |
f45663ce CL |
115 | /* Special mount options */ |
116 | Opt_userspace, Opt_deprecated, Opt_sloppy, | |
bf0fd768 CL |
117 | |
118 | Opt_err | |
119 | }; | |
120 | ||
a447c093 | 121 | static const match_table_t nfs_mount_option_tokens = { |
bf0fd768 CL |
122 | { Opt_userspace, "bg" }, |
123 | { Opt_userspace, "fg" }, | |
ecbb3845 CL |
124 | { Opt_userspace, "retry=%s" }, |
125 | ||
f45663ce CL |
126 | { Opt_sloppy, "sloppy" }, |
127 | ||
bf0fd768 CL |
128 | { Opt_soft, "soft" }, |
129 | { Opt_hard, "hard" }, | |
d33e4dfe CL |
130 | { Opt_deprecated, "intr" }, |
131 | { Opt_deprecated, "nointr" }, | |
bf0fd768 CL |
132 | { Opt_posix, "posix" }, |
133 | { Opt_noposix, "noposix" }, | |
134 | { Opt_cto, "cto" }, | |
135 | { Opt_nocto, "nocto" }, | |
136 | { Opt_ac, "ac" }, | |
137 | { Opt_noac, "noac" }, | |
138 | { Opt_lock, "lock" }, | |
139 | { Opt_nolock, "nolock" }, | |
bf0fd768 CL |
140 | { Opt_udp, "udp" }, |
141 | { Opt_tcp, "tcp" }, | |
2cf7ff7a | 142 | { Opt_rdma, "rdma" }, |
bf0fd768 CL |
143 | { Opt_acl, "acl" }, |
144 | { Opt_noacl, "noacl" }, | |
145 | { Opt_rdirplus, "rdirplus" }, | |
146 | { Opt_nordirplus, "nordirplus" }, | |
75180df2 TM |
147 | { Opt_sharecache, "sharecache" }, |
148 | { Opt_nosharecache, "nosharecache" }, | |
d740351b CL |
149 | { Opt_resvport, "resvport" }, |
150 | { Opt_noresvport, "noresvport" }, | |
b797cac7 | 151 | { Opt_fscache, "fsc" }, |
b797cac7 | 152 | { Opt_nofscache, "nofsc" }, |
89652617 CL |
153 | { Opt_migration, "migration" }, |
154 | { Opt_nomigration, "nomigration" }, | |
bf0fd768 | 155 | |
a5a16bae CL |
156 | { Opt_port, "port=%s" }, |
157 | { Opt_rsize, "rsize=%s" }, | |
158 | { Opt_wsize, "wsize=%s" }, | |
159 | { Opt_bsize, "bsize=%s" }, | |
160 | { Opt_timeo, "timeo=%s" }, | |
161 | { Opt_retrans, "retrans=%s" }, | |
162 | { Opt_acregmin, "acregmin=%s" }, | |
163 | { Opt_acregmax, "acregmax=%s" }, | |
164 | { Opt_acdirmin, "acdirmin=%s" }, | |
165 | { Opt_acdirmax, "acdirmax=%s" }, | |
166 | { Opt_actimeo, "actimeo=%s" }, | |
167 | { Opt_namelen, "namlen=%s" }, | |
168 | { Opt_mountport, "mountport=%s" }, | |
169 | { Opt_mountvers, "mountvers=%s" }, | |
0d71b058 TM |
170 | { Opt_minorversion, "minorversion=%s" }, |
171 | ||
a5a16bae CL |
172 | { Opt_nfsvers, "nfsvers=%s" }, |
173 | { Opt_nfsvers, "vers=%s" }, | |
bf0fd768 CL |
174 | |
175 | { Opt_sec, "sec=%s" }, | |
176 | { Opt_proto, "proto=%s" }, | |
177 | { Opt_mountproto, "mountproto=%s" }, | |
178 | { Opt_addr, "addr=%s" }, | |
179 | { Opt_clientaddr, "clientaddr=%s" }, | |
33832034 | 180 | { Opt_mounthost, "mounthost=%s" }, |
0ac83779 | 181 | { Opt_mountaddr, "mountaddr=%s" }, |
bf0fd768 | 182 | |
7973c1f1 | 183 | { Opt_lookupcache, "lookupcache=%s" }, |
a6d5ff64 | 184 | { Opt_fscache_uniq, "fsc=%s" }, |
5eebde23 | 185 | { Opt_local_lock, "local_lock=%s" }, |
7973c1f1 | 186 | |
3862279a TM |
187 | /* The following needs to be listed after all other options */ |
188 | { Opt_nfsvers, "v%s" }, | |
189 | ||
bf0fd768 CL |
190 | { Opt_err, NULL } |
191 | }; | |
192 | ||
193 | enum { | |
ee671b01 | 194 | Opt_xprt_udp, Opt_xprt_udp6, Opt_xprt_tcp, Opt_xprt_tcp6, Opt_xprt_rdma, |
bf0fd768 CL |
195 | |
196 | Opt_xprt_err | |
197 | }; | |
198 | ||
a447c093 | 199 | static const match_table_t nfs_xprt_protocol_tokens = { |
bf0fd768 | 200 | { Opt_xprt_udp, "udp" }, |
ee671b01 | 201 | { Opt_xprt_udp6, "udp6" }, |
bf0fd768 | 202 | { Opt_xprt_tcp, "tcp" }, |
ee671b01 | 203 | { Opt_xprt_tcp6, "tcp6" }, |
2cf7ff7a | 204 | { Opt_xprt_rdma, "rdma" }, |
bf0fd768 CL |
205 | |
206 | { Opt_xprt_err, NULL } | |
207 | }; | |
208 | ||
209 | enum { | |
210 | Opt_sec_none, Opt_sec_sys, | |
211 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
212 | Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, | |
213 | Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, | |
214 | ||
215 | Opt_sec_err | |
216 | }; | |
217 | ||
a447c093 | 218 | static const match_table_t nfs_secflavor_tokens = { |
bf0fd768 CL |
219 | { Opt_sec_none, "none" }, |
220 | { Opt_sec_none, "null" }, | |
221 | { Opt_sec_sys, "sys" }, | |
222 | ||
223 | { Opt_sec_krb5, "krb5" }, | |
224 | { Opt_sec_krb5i, "krb5i" }, | |
225 | { Opt_sec_krb5p, "krb5p" }, | |
226 | ||
227 | { Opt_sec_lkey, "lkey" }, | |
228 | { Opt_sec_lkeyi, "lkeyi" }, | |
229 | { Opt_sec_lkeyp, "lkeyp" }, | |
230 | ||
8d042218 OK |
231 | { Opt_sec_spkm, "spkm3" }, |
232 | { Opt_sec_spkmi, "spkm3i" }, | |
233 | { Opt_sec_spkmp, "spkm3p" }, | |
234 | ||
bf0fd768 CL |
235 | { Opt_sec_err, NULL } |
236 | }; | |
237 | ||
7973c1f1 TM |
238 | enum { |
239 | Opt_lookupcache_all, Opt_lookupcache_positive, | |
240 | Opt_lookupcache_none, | |
241 | ||
242 | Opt_lookupcache_err | |
243 | }; | |
244 | ||
245 | static match_table_t nfs_lookupcache_tokens = { | |
246 | { Opt_lookupcache_all, "all" }, | |
247 | { Opt_lookupcache_positive, "pos" }, | |
248 | { Opt_lookupcache_positive, "positive" }, | |
249 | { Opt_lookupcache_none, "none" }, | |
250 | ||
251 | { Opt_lookupcache_err, NULL } | |
252 | }; | |
253 | ||
5eebde23 SJ |
254 | enum { |
255 | Opt_local_lock_all, Opt_local_lock_flock, Opt_local_lock_posix, | |
256 | Opt_local_lock_none, | |
257 | ||
258 | Opt_local_lock_err | |
259 | }; | |
260 | ||
261 | static match_table_t nfs_local_lock_tokens = { | |
262 | { Opt_local_lock_all, "all" }, | |
263 | { Opt_local_lock_flock, "flock" }, | |
264 | { Opt_local_lock_posix, "posix" }, | |
265 | { Opt_local_lock_none, "none" }, | |
266 | ||
267 | { Opt_local_lock_err, NULL } | |
268 | }; | |
269 | ||
0d71b058 TM |
270 | enum { |
271 | Opt_vers_2, Opt_vers_3, Opt_vers_4, Opt_vers_4_0, | |
42c2c424 | 272 | Opt_vers_4_1, Opt_vers_4_2, |
0d71b058 TM |
273 | |
274 | Opt_vers_err | |
275 | }; | |
276 | ||
277 | static match_table_t nfs_vers_tokens = { | |
278 | { Opt_vers_2, "2" }, | |
279 | { Opt_vers_3, "3" }, | |
280 | { Opt_vers_4, "4" }, | |
281 | { Opt_vers_4_0, "4.0" }, | |
282 | { Opt_vers_4_1, "4.1" }, | |
42c2c424 | 283 | { Opt_vers_4_2, "4.2" }, |
0d71b058 TM |
284 | |
285 | { Opt_vers_err, NULL } | |
286 | }; | |
bf0fd768 | 287 | |
31f43471 AV |
288 | static struct dentry *nfs_xdev_mount(struct file_system_type *fs_type, |
289 | int flags, const char *dev_name, void *raw_data); | |
f7b422b1 | 290 | |
ab7017a3 | 291 | struct file_system_type nfs_fs_type = { |
f7b422b1 DH |
292 | .owner = THIS_MODULE, |
293 | .name = "nfs", | |
01194981 | 294 | .mount = nfs_fs_mount, |
f7b422b1 | 295 | .kill_sb = nfs_kill_super, |
ecf3d1f1 | 296 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, |
f7b422b1 | 297 | }; |
7f78e035 | 298 | MODULE_ALIAS_FS("nfs"); |
ddda8e0a | 299 | EXPORT_SYMBOL_GPL(nfs_fs_type); |
f7b422b1 | 300 | |
54ceac45 | 301 | struct file_system_type nfs_xdev_fs_type = { |
f7b422b1 DH |
302 | .owner = THIS_MODULE, |
303 | .name = "nfs", | |
31f43471 | 304 | .mount = nfs_xdev_mount, |
f7b422b1 | 305 | .kill_sb = nfs_kill_super, |
ecf3d1f1 | 306 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
307 | }; |
308 | ||
6a74490d | 309 | const struct super_operations nfs_sops = { |
f7b422b1 DH |
310 | .alloc_inode = nfs_alloc_inode, |
311 | .destroy_inode = nfs_destroy_inode, | |
312 | .write_inode = nfs_write_inode, | |
eed99357 | 313 | .drop_inode = nfs_drop_inode, |
387c149b | 314 | .put_super = nfs_put_super, |
f7b422b1 | 315 | .statfs = nfs_statfs, |
b57922d9 | 316 | .evict_inode = nfs_evict_inode, |
f7b422b1 DH |
317 | .umount_begin = nfs_umount_begin, |
318 | .show_options = nfs_show_options, | |
c7f404b4 AV |
319 | .show_devname = nfs_show_devname, |
320 | .show_path = nfs_show_path, | |
f7b422b1 | 321 | .show_stats = nfs_show_stats, |
48b605f8 | 322 | .remount_fs = nfs_remount, |
f7b422b1 | 323 | }; |
ddda8e0a | 324 | EXPORT_SYMBOL_GPL(nfs_sops); |
f7b422b1 | 325 | |
89d77c8f | 326 | #if IS_ENABLED(CONFIG_NFS_V4) |
b72e4f42 | 327 | static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *); |
d72c727c BS |
328 | static int nfs4_validate_mount_data(void *options, |
329 | struct nfs_parsed_mount_data *args, const char *dev_name); | |
1ae811ee | 330 | |
331 | struct file_system_type nfs4_fs_type = { | |
332 | .owner = THIS_MODULE, | |
333 | .name = "nfs4", | |
334 | .mount = nfs_fs_mount, | |
335 | .kill_sb = nfs_kill_super, | |
ecf3d1f1 | 336 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, |
1ae811ee | 337 | }; |
7f78e035 | 338 | MODULE_ALIAS_FS("nfs4"); |
fa7614dd | 339 | MODULE_ALIAS("nfs4"); |
1ae811ee | 340 | EXPORT_SYMBOL_GPL(nfs4_fs_type); |
341 | ||
342 | static int __init register_nfs4_fs(void) | |
343 | { | |
344 | return register_filesystem(&nfs4_fs_type); | |
345 | } | |
346 | ||
347 | static void unregister_nfs4_fs(void) | |
348 | { | |
349 | unregister_filesystem(&nfs4_fs_type); | |
350 | } | |
351 | #else | |
352 | static int __init register_nfs4_fs(void) | |
353 | { | |
354 | return 0; | |
355 | } | |
356 | ||
357 | static void unregister_nfs4_fs(void) | |
358 | { | |
359 | } | |
f7b422b1 DH |
360 | #endif |
361 | ||
8e1f936b | 362 | static struct shrinker acl_shrinker = { |
1ab6c499 DC |
363 | .count_objects = nfs_access_cache_count, |
364 | .scan_objects = nfs_access_cache_scan, | |
8e1f936b RR |
365 | .seeks = DEFAULT_SEEKS, |
366 | }; | |
979df72e | 367 | |
f7b422b1 DH |
368 | /* |
369 | * Register the NFS filesystems | |
370 | */ | |
371 | int __init register_nfs_fs(void) | |
372 | { | |
373 | int ret; | |
374 | ||
375 | ret = register_filesystem(&nfs_fs_type); | |
376 | if (ret < 0) | |
377 | goto error_0; | |
378 | ||
1ae811ee | 379 | ret = register_nfs4_fs(); |
f7b422b1 DH |
380 | if (ret < 0) |
381 | goto error_1; | |
1ae811ee | 382 | |
383 | ret = nfs_register_sysctl(); | |
384 | if (ret < 0) | |
385 | goto error_2; | |
8e1f936b | 386 | register_shrinker(&acl_shrinker); |
f7b422b1 DH |
387 | return 0; |
388 | ||
1ae811ee | 389 | error_2: |
390 | unregister_nfs4_fs(); | |
f7b422b1 DH |
391 | error_1: |
392 | unregister_filesystem(&nfs_fs_type); | |
f7b422b1 DH |
393 | error_0: |
394 | return ret; | |
395 | } | |
396 | ||
397 | /* | |
398 | * Unregister the NFS filesystems | |
399 | */ | |
400 | void __exit unregister_nfs_fs(void) | |
401 | { | |
8e1f936b | 402 | unregister_shrinker(&acl_shrinker); |
49af7ee1 | 403 | nfs_unregister_sysctl(); |
1ae811ee | 404 | unregister_nfs4_fs(); |
f7b422b1 DH |
405 | unregister_filesystem(&nfs_fs_type); |
406 | } | |
407 | ||
1daef0a8 | 408 | void nfs_sb_active(struct super_block *sb) |
ef818a28 | 409 | { |
1daef0a8 | 410 | struct nfs_server *server = NFS_SB(sb); |
ef818a28 | 411 | |
1daef0a8 TM |
412 | if (atomic_inc_return(&server->active) == 1) |
413 | atomic_inc(&sb->s_active); | |
ef818a28 | 414 | } |
89d77c8f | 415 | EXPORT_SYMBOL_GPL(nfs_sb_active); |
ef818a28 | 416 | |
1daef0a8 | 417 | void nfs_sb_deactive(struct super_block *sb) |
ef818a28 SD |
418 | { |
419 | struct nfs_server *server = NFS_SB(sb); | |
1daef0a8 TM |
420 | |
421 | if (atomic_dec_and_test(&server->active)) | |
422 | deactivate_super(sb); | |
ef818a28 | 423 | } |
89d77c8f | 424 | EXPORT_SYMBOL_GPL(nfs_sb_deactive); |
ef818a28 | 425 | |
f7b422b1 DH |
426 | /* |
427 | * Deliver file system statistics to userspace | |
428 | */ | |
fbdefd64 | 429 | int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
f7b422b1 | 430 | { |
0c7d90cf | 431 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
f7b422b1 DH |
432 | unsigned char blockbits; |
433 | unsigned long blockres; | |
0c7d90cf | 434 | struct nfs_fh *fh = NFS_FH(dentry->d_inode); |
ca7e9a0d TM |
435 | struct nfs_fsstat res; |
436 | int error = -ENOMEM; | |
437 | ||
438 | res.fattr = nfs_alloc_fattr(); | |
439 | if (res.fattr == NULL) | |
440 | goto out_err; | |
f7b422b1 | 441 | |
8fa5c000 | 442 | error = server->nfs_client->rpc_ops->statfs(server, fh, &res); |
fbf3fdd2 MZ |
443 | if (unlikely(error == -ESTALE)) { |
444 | struct dentry *pd_dentry; | |
445 | ||
446 | pd_dentry = dget_parent(dentry); | |
447 | if (pd_dentry != NULL) { | |
448 | nfs_zap_caches(pd_dentry->d_inode); | |
449 | dput(pd_dentry); | |
450 | } | |
451 | } | |
ca7e9a0d | 452 | nfs_free_fattr(res.fattr); |
f7b422b1 DH |
453 | if (error < 0) |
454 | goto out_err; | |
ca7e9a0d | 455 | |
1a0ba9ae | 456 | buf->f_type = NFS_SUPER_MAGIC; |
f7b422b1 DH |
457 | |
458 | /* | |
459 | * Current versions of glibc do not correctly handle the | |
460 | * case where f_frsize != f_bsize. Eventually we want to | |
461 | * report the value of wtmult in this field. | |
462 | */ | |
0c7d90cf | 463 | buf->f_frsize = dentry->d_sb->s_blocksize; |
f7b422b1 DH |
464 | |
465 | /* | |
466 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
467 | * are reported in units of f_frsize. Linux hasn't had | |
468 | * an f_frsize field in its statfs struct until recently, | |
469 | * thus historically Linux's sys_statfs reports these | |
470 | * fields in units of f_bsize. | |
471 | */ | |
0c7d90cf DH |
472 | buf->f_bsize = dentry->d_sb->s_blocksize; |
473 | blockbits = dentry->d_sb->s_blocksize_bits; | |
f7b422b1 DH |
474 | blockres = (1 << blockbits) - 1; |
475 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
476 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
477 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
478 | ||
479 | buf->f_files = res.tfiles; | |
480 | buf->f_ffree = res.afiles; | |
481 | ||
482 | buf->f_namelen = server->namelen; | |
1a0ba9ae | 483 | |
f7b422b1 DH |
484 | return 0; |
485 | ||
486 | out_err: | |
3110ff80 | 487 | dprintk("%s: statfs error = %d\n", __func__, -error); |
1a0ba9ae | 488 | return error; |
f7b422b1 | 489 | } |
89d77c8f | 490 | EXPORT_SYMBOL_GPL(nfs_statfs); |
f7b422b1 | 491 | |
7d4e2747 DH |
492 | /* |
493 | * Map the security flavour number to a name | |
494 | */ | |
81039f1f TM |
495 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
496 | { | |
7d4e2747 | 497 | static const struct { |
81039f1f TM |
498 | rpc_authflavor_t flavour; |
499 | const char *str; | |
4d4b69dd WAA |
500 | } sec_flavours[NFS_AUTH_INFO_MAX_FLAVORS] = { |
501 | /* update NFS_AUTH_INFO_MAX_FLAVORS when this list changes! */ | |
81039f1f TM |
502 | { RPC_AUTH_NULL, "null" }, |
503 | { RPC_AUTH_UNIX, "sys" }, | |
504 | { RPC_AUTH_GSS_KRB5, "krb5" }, | |
505 | { RPC_AUTH_GSS_KRB5I, "krb5i" }, | |
506 | { RPC_AUTH_GSS_KRB5P, "krb5p" }, | |
507 | { RPC_AUTH_GSS_LKEY, "lkey" }, | |
508 | { RPC_AUTH_GSS_LKEYI, "lkeyi" }, | |
509 | { RPC_AUTH_GSS_LKEYP, "lkeyp" }, | |
510 | { RPC_AUTH_GSS_SPKM, "spkm" }, | |
511 | { RPC_AUTH_GSS_SPKMI, "spkmi" }, | |
512 | { RPC_AUTH_GSS_SPKMP, "spkmp" }, | |
4d81cd16 | 513 | { UINT_MAX, "unknown" } |
81039f1f TM |
514 | }; |
515 | int i; | |
516 | ||
4d81cd16 | 517 | for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) { |
81039f1f TM |
518 | if (sec_flavours[i].flavour == flavour) |
519 | break; | |
520 | } | |
521 | return sec_flavours[i].str; | |
522 | } | |
523 | ||
ee671b01 JL |
524 | static void nfs_show_mountd_netid(struct seq_file *m, struct nfs_server *nfss, |
525 | int showdefaults) | |
526 | { | |
527 | struct sockaddr *sap = (struct sockaddr *) &nfss->mountd_address; | |
528 | ||
529 | seq_printf(m, ",mountproto="); | |
530 | switch (sap->sa_family) { | |
531 | case AF_INET: | |
532 | switch (nfss->mountd_protocol) { | |
533 | case IPPROTO_UDP: | |
534 | seq_printf(m, RPCBIND_NETID_UDP); | |
535 | break; | |
536 | case IPPROTO_TCP: | |
537 | seq_printf(m, RPCBIND_NETID_TCP); | |
538 | break; | |
539 | default: | |
540 | if (showdefaults) | |
541 | seq_printf(m, "auto"); | |
542 | } | |
543 | break; | |
544 | case AF_INET6: | |
545 | switch (nfss->mountd_protocol) { | |
546 | case IPPROTO_UDP: | |
547 | seq_printf(m, RPCBIND_NETID_UDP6); | |
548 | break; | |
549 | case IPPROTO_TCP: | |
550 | seq_printf(m, RPCBIND_NETID_TCP6); | |
551 | break; | |
552 | default: | |
553 | if (showdefaults) | |
554 | seq_printf(m, "auto"); | |
555 | } | |
556 | break; | |
557 | default: | |
558 | if (showdefaults) | |
559 | seq_printf(m, "auto"); | |
560 | } | |
561 | } | |
562 | ||
82d101d5 CL |
563 | static void nfs_show_mountd_options(struct seq_file *m, struct nfs_server *nfss, |
564 | int showdefaults) | |
565 | { | |
566 | struct sockaddr *sap = (struct sockaddr *)&nfss->mountd_address; | |
567 | ||
d5eff1a3 BS |
568 | if (nfss->flags & NFS_MOUNT_LEGACY_INTERFACE) |
569 | return; | |
570 | ||
82d101d5 CL |
571 | switch (sap->sa_family) { |
572 | case AF_INET: { | |
573 | struct sockaddr_in *sin = (struct sockaddr_in *)sap; | |
be859405 | 574 | seq_printf(m, ",mountaddr=%pI4", &sin->sin_addr.s_addr); |
82d101d5 CL |
575 | break; |
576 | } | |
577 | case AF_INET6: { | |
578 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
d250e190 | 579 | seq_printf(m, ",mountaddr=%pI6c", &sin6->sin6_addr); |
82d101d5 CL |
580 | break; |
581 | } | |
582 | default: | |
583 | if (showdefaults) | |
584 | seq_printf(m, ",mountaddr=unspecified"); | |
585 | } | |
586 | ||
587 | if (nfss->mountd_version || showdefaults) | |
588 | seq_printf(m, ",mountvers=%u", nfss->mountd_version); | |
aa699473 SK |
589 | if ((nfss->mountd_port && |
590 | nfss->mountd_port != (unsigned short)NFS_UNSPEC_PORT) || | |
591 | showdefaults) | |
82d101d5 CL |
592 | seq_printf(m, ",mountport=%u", nfss->mountd_port); |
593 | ||
ee671b01 | 594 | nfs_show_mountd_netid(m, nfss, showdefaults); |
82d101d5 CL |
595 | } |
596 | ||
89d77c8f | 597 | #if IS_ENABLED(CONFIG_NFS_V4) |
0be8189f TM |
598 | static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss, |
599 | int showdefaults) | |
600 | { | |
601 | struct nfs_client *clp = nfss->nfs_client; | |
602 | ||
603 | seq_printf(m, ",clientaddr=%s", clp->cl_ipaddr); | |
0be8189f TM |
604 | } |
605 | #else | |
606 | static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss, | |
607 | int showdefaults) | |
608 | { | |
609 | } | |
610 | #endif | |
611 | ||
7bbceb6f TM |
612 | static void nfs_show_nfs_version(struct seq_file *m, |
613 | unsigned int version, | |
614 | unsigned int minorversion) | |
615 | { | |
616 | seq_printf(m, ",vers=%u", version); | |
617 | if (version == 4) | |
618 | seq_printf(m, ".%u", minorversion); | |
619 | } | |
620 | ||
f7b422b1 DH |
621 | /* |
622 | * Describe the mount options in force on this server representation | |
623 | */ | |
82d101d5 CL |
624 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, |
625 | int showdefaults) | |
f7b422b1 | 626 | { |
509de811 | 627 | static const struct proc_nfs_info { |
f7b422b1 | 628 | int flag; |
509de811 DH |
629 | const char *str; |
630 | const char *nostr; | |
f7b422b1 DH |
631 | } nfs_info[] = { |
632 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, | |
82d101d5 | 633 | { NFS_MOUNT_POSIX, ",posix", "" }, |
f7b422b1 DH |
634 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
635 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
636 | { NFS_MOUNT_NONLM, ",nolock", "" }, | |
637 | { NFS_MOUNT_NOACL, ",noacl", "" }, | |
74dd34e6 | 638 | { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" }, |
d740351b CL |
639 | { NFS_MOUNT_UNSHARED, ",nosharecache", "" }, |
640 | { NFS_MOUNT_NORESVPORT, ",noresvport", "" }, | |
f7b422b1 DH |
641 | { 0, NULL, NULL } |
642 | }; | |
509de811 | 643 | const struct proc_nfs_info *nfs_infop; |
8fa5c000 | 644 | struct nfs_client *clp = nfss->nfs_client; |
82d101d5 | 645 | u32 version = clp->rpc_ops->version; |
7c563cc9 | 646 | int local_flock, local_fcntl; |
f7b422b1 | 647 | |
7bbceb6f | 648 | nfs_show_nfs_version(m, version, clp->cl_minorversion); |
2d767432 CL |
649 | seq_printf(m, ",rsize=%u", nfss->rsize); |
650 | seq_printf(m, ",wsize=%u", nfss->wsize); | |
82d101d5 CL |
651 | if (nfss->bsize != 0) |
652 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
653 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
0e0cab74 | 654 | if (nfss->acregmin != NFS_DEF_ACREGMIN*HZ || showdefaults) |
2d767432 | 655 | seq_printf(m, ",acregmin=%u", nfss->acregmin/HZ); |
0e0cab74 | 656 | if (nfss->acregmax != NFS_DEF_ACREGMAX*HZ || showdefaults) |
2d767432 | 657 | seq_printf(m, ",acregmax=%u", nfss->acregmax/HZ); |
0e0cab74 | 658 | if (nfss->acdirmin != NFS_DEF_ACDIRMIN*HZ || showdefaults) |
2d767432 | 659 | seq_printf(m, ",acdirmin=%u", nfss->acdirmin/HZ); |
0e0cab74 | 660 | if (nfss->acdirmax != NFS_DEF_ACDIRMAX*HZ || showdefaults) |
2d767432 | 661 | seq_printf(m, ",acdirmax=%u", nfss->acdirmax/HZ); |
f7b422b1 DH |
662 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { |
663 | if (nfss->flags & nfs_infop->flag) | |
664 | seq_puts(m, nfs_infop->str); | |
665 | else | |
666 | seq_puts(m, nfs_infop->nostr); | |
667 | } | |
2446ab60 | 668 | rcu_read_lock(); |
56928edd | 669 | seq_printf(m, ",proto=%s", |
ee671b01 | 670 | rpc_peeraddr2str(nfss->client, RPC_DISPLAY_NETID)); |
2446ab60 | 671 | rcu_read_unlock(); |
82d101d5 CL |
672 | if (version == 4) { |
673 | if (nfss->port != NFS_PORT) | |
674 | seq_printf(m, ",port=%u", nfss->port); | |
675 | } else | |
676 | if (nfss->port) | |
677 | seq_printf(m, ",port=%u", nfss->port); | |
678 | ||
33170233 TM |
679 | seq_printf(m, ",timeo=%lu", 10U * nfss->client->cl_timeout->to_initval / HZ); |
680 | seq_printf(m, ",retrans=%u", nfss->client->cl_timeout->to_retries); | |
81039f1f | 681 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
82d101d5 CL |
682 | |
683 | if (version != 4) | |
684 | nfs_show_mountd_options(m, nfss, showdefaults); | |
0be8189f TM |
685 | else |
686 | nfs_show_nfsv4_options(m, nfss, showdefaults); | |
82d101d5 | 687 | |
b797cac7 DH |
688 | if (nfss->options & NFS_OPTION_FSCACHE) |
689 | seq_printf(m, ",fsc"); | |
9b00c643 | 690 | |
89652617 CL |
691 | if (nfss->options & NFS_OPTION_MIGRATION) |
692 | seq_printf(m, ",migration"); | |
693 | ||
9b00c643 PL |
694 | if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONEG) { |
695 | if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONE) | |
696 | seq_printf(m, ",lookupcache=none"); | |
697 | else | |
698 | seq_printf(m, ",lookupcache=pos"); | |
699 | } | |
7c563cc9 SJ |
700 | |
701 | local_flock = nfss->flags & NFS_MOUNT_LOCAL_FLOCK; | |
702 | local_fcntl = nfss->flags & NFS_MOUNT_LOCAL_FCNTL; | |
703 | ||
704 | if (!local_flock && !local_fcntl) | |
705 | seq_printf(m, ",local_lock=none"); | |
706 | else if (local_flock && local_fcntl) | |
707 | seq_printf(m, ",local_lock=all"); | |
708 | else if (local_flock) | |
709 | seq_printf(m, ",local_lock=flock"); | |
710 | else | |
711 | seq_printf(m, ",local_lock=posix"); | |
f7b422b1 DH |
712 | } |
713 | ||
714 | /* | |
715 | * Describe the mount options on this VFS mountpoint | |
716 | */ | |
fbdefd64 | 717 | int nfs_show_options(struct seq_file *m, struct dentry *root) |
f7b422b1 | 718 | { |
34c80b1d | 719 | struct nfs_server *nfss = NFS_SB(root->d_sb); |
f7b422b1 DH |
720 | |
721 | nfs_show_mount_options(m, nfss, 0); | |
722 | ||
2446ab60 | 723 | rcu_read_lock(); |
5d8515ca CL |
724 | seq_printf(m, ",addr=%s", |
725 | rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient, | |
726 | RPC_DISPLAY_ADDR)); | |
2446ab60 | 727 | rcu_read_unlock(); |
f7b422b1 DH |
728 | |
729 | return 0; | |
730 | } | |
89d77c8f | 731 | EXPORT_SYMBOL_GPL(nfs_show_options); |
45402c38 | 732 | |
89d77c8f | 733 | #if IS_ENABLED(CONFIG_NFS_V4) |
ae50c0b5 | 734 | #ifdef CONFIG_NFS_V4_1 |
45402c38 | 735 | static void show_sessions(struct seq_file *m, struct nfs_server *server) |
ae50c0b5 BF |
736 | { |
737 | if (nfs4_has_session(server->nfs_client)) | |
738 | seq_printf(m, ",sessions"); | |
739 | } | |
740 | #else | |
45402c38 HS |
741 | static void show_sessions(struct seq_file *m, struct nfs_server *server) {} |
742 | #endif | |
ae50c0b5 BF |
743 | #endif |
744 | ||
745 | #ifdef CONFIG_NFS_V4_1 | |
45402c38 | 746 | static void show_pnfs(struct seq_file *m, struct nfs_server *server) |
ae50c0b5 BF |
747 | { |
748 | seq_printf(m, ",pnfs="); | |
749 | if (server->pnfs_curr_ld) | |
750 | seq_printf(m, "%s", server->pnfs_curr_ld->name); | |
751 | else | |
752 | seq_printf(m, "not configured"); | |
753 | } | |
7e03b7cc TM |
754 | |
755 | static void show_implementation_id(struct seq_file *m, struct nfs_server *nfss) | |
756 | { | |
59155546 CL |
757 | if (nfss->nfs_client && nfss->nfs_client->cl_implid) { |
758 | struct nfs41_impl_id *impl_id = nfss->nfs_client->cl_implid; | |
7e03b7cc TM |
759 | seq_printf(m, "\n\timpl_id:\tname='%s',domain='%s'," |
760 | "date='%llu,%u'", | |
761 | impl_id->name, impl_id->domain, | |
762 | impl_id->date.seconds, impl_id->date.nseconds); | |
763 | } | |
764 | } | |
45402c38 | 765 | #else |
89d77c8f | 766 | #if IS_ENABLED(CONFIG_NFS_V4) |
7e03b7cc TM |
767 | static void show_pnfs(struct seq_file *m, struct nfs_server *server) |
768 | { | |
769 | } | |
45402c38 | 770 | #endif |
7e03b7cc TM |
771 | static void show_implementation_id(struct seq_file *m, struct nfs_server *nfss) |
772 | { | |
773 | } | |
45402c38 | 774 | #endif |
f7b422b1 | 775 | |
fbdefd64 | 776 | int nfs_show_devname(struct seq_file *m, struct dentry *root) |
c7f404b4 AV |
777 | { |
778 | char *page = (char *) __get_free_page(GFP_KERNEL); | |
779 | char *devname, *dummy; | |
780 | int err = 0; | |
781 | if (!page) | |
782 | return -ENOMEM; | |
97a54868 | 783 | devname = nfs_path(&dummy, root, page, PAGE_SIZE, 0); |
c7f404b4 AV |
784 | if (IS_ERR(devname)) |
785 | err = PTR_ERR(devname); | |
786 | else | |
787 | seq_escape(m, devname, " \t\n\\"); | |
788 | free_page((unsigned long)page); | |
789 | return err; | |
790 | } | |
89d77c8f | 791 | EXPORT_SYMBOL_GPL(nfs_show_devname); |
c7f404b4 | 792 | |
fbdefd64 | 793 | int nfs_show_path(struct seq_file *m, struct dentry *dentry) |
c7f404b4 AV |
794 | { |
795 | seq_puts(m, "/"); | |
796 | return 0; | |
797 | } | |
89d77c8f | 798 | EXPORT_SYMBOL_GPL(nfs_show_path); |
c7f404b4 | 799 | |
f7b422b1 DH |
800 | /* |
801 | * Present statistical information for this VFS mountpoint | |
802 | */ | |
fbdefd64 | 803 | int nfs_show_stats(struct seq_file *m, struct dentry *root) |
f7b422b1 DH |
804 | { |
805 | int i, cpu; | |
64132379 | 806 | struct nfs_server *nfss = NFS_SB(root->d_sb); |
f7b422b1 DH |
807 | struct rpc_auth *auth = nfss->client->cl_auth; |
808 | struct nfs_iostats totals = { }; | |
809 | ||
810 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
811 | ||
812 | /* | |
813 | * Display all mount option settings | |
814 | */ | |
815 | seq_printf(m, "\n\topts:\t"); | |
64132379 AV |
816 | seq_puts(m, root->d_sb->s_flags & MS_RDONLY ? "ro" : "rw"); |
817 | seq_puts(m, root->d_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); | |
818 | seq_puts(m, root->d_sb->s_flags & MS_NOATIME ? ",noatime" : ""); | |
819 | seq_puts(m, root->d_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); | |
f7b422b1 DH |
820 | nfs_show_mount_options(m, nfss, 1); |
821 | ||
822 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); | |
823 | ||
7e03b7cc | 824 | show_implementation_id(m, nfss); |
7d2ed9ac | 825 | |
f7b422b1 DH |
826 | seq_printf(m, "\n\tcaps:\t"); |
827 | seq_printf(m, "caps=0x%x", nfss->caps); | |
2d767432 CL |
828 | seq_printf(m, ",wtmult=%u", nfss->wtmult); |
829 | seq_printf(m, ",dtsize=%u", nfss->dtsize); | |
830 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
831 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
f7b422b1 | 832 | |
89d77c8f | 833 | #if IS_ENABLED(CONFIG_NFS_V4) |
40c55319 | 834 | if (nfss->nfs_client->rpc_ops->version == 4) { |
f7b422b1 DH |
835 | seq_printf(m, "\n\tnfsv4:\t"); |
836 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); | |
837 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
a09df2ca | 838 | seq_printf(m, ",bm2=0x%x", nfss->attr_bitmask[2]); |
f7b422b1 | 839 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); |
ae50c0b5 BF |
840 | show_sessions(m, nfss); |
841 | show_pnfs(m, nfss); | |
f7b422b1 DH |
842 | } |
843 | #endif | |
844 | ||
845 | /* | |
846 | * Display security flavor in effect for this mount | |
847 | */ | |
2d767432 | 848 | seq_printf(m, "\n\tsec:\tflavor=%u", auth->au_ops->au_flavor); |
f7b422b1 | 849 | if (auth->au_flavor) |
2d767432 | 850 | seq_printf(m, ",pseudoflavor=%u", auth->au_flavor); |
f7b422b1 DH |
851 | |
852 | /* | |
853 | * Display superblock I/O counters | |
854 | */ | |
855 | for_each_possible_cpu(cpu) { | |
856 | struct nfs_iostats *stats; | |
857 | ||
858 | preempt_disable(); | |
859 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
860 | ||
861 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
862 | totals.events[i] += stats->events[i]; | |
863 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
864 | totals.bytes[i] += stats->bytes[i]; | |
6a51091d DH |
865 | #ifdef CONFIG_NFS_FSCACHE |
866 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
867 | totals.fscache[i] += stats->fscache[i]; | |
868 | #endif | |
f7b422b1 DH |
869 | |
870 | preempt_enable(); | |
871 | } | |
872 | ||
873 | seq_printf(m, "\n\tevents:\t"); | |
874 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
875 | seq_printf(m, "%lu ", totals.events[i]); | |
876 | seq_printf(m, "\n\tbytes:\t"); | |
877 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
878 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
6a51091d DH |
879 | #ifdef CONFIG_NFS_FSCACHE |
880 | if (nfss->options & NFS_OPTION_FSCACHE) { | |
881 | seq_printf(m, "\n\tfsc:\t"); | |
882 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
883 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
884 | } | |
885 | #endif | |
f7b422b1 DH |
886 | seq_printf(m, "\n"); |
887 | ||
888 | rpc_print_iostats(m, nfss->client); | |
889 | ||
890 | return 0; | |
891 | } | |
89d77c8f | 892 | EXPORT_SYMBOL_GPL(nfs_show_stats); |
f7b422b1 DH |
893 | |
894 | /* | |
895 | * Begin unmount by attempting to remove all automounted mountpoints we added | |
54ceac45 | 896 | * in response to xdev traversals and referrals |
f7b422b1 | 897 | */ |
fbdefd64 | 898 | void nfs_umount_begin(struct super_block *sb) |
f7b422b1 | 899 | { |
67e55205 | 900 | struct nfs_server *server; |
fc6ae3cf TM |
901 | struct rpc_clnt *rpc; |
902 | ||
67e55205 | 903 | server = NFS_SB(sb); |
fc6ae3cf TM |
904 | /* -EIO all pending I/O */ |
905 | rpc = server->client_acl; | |
906 | if (!IS_ERR(rpc)) | |
907 | rpc_killall_tasks(rpc); | |
908 | rpc = server->client; | |
909 | if (!IS_ERR(rpc)) | |
910 | rpc_killall_tasks(rpc); | |
f7b422b1 | 911 | } |
89d77c8f | 912 | EXPORT_SYMBOL_GPL(nfs_umount_begin); |
f7b422b1 | 913 | |
db833351 | 914 | static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void) |
9423a08a CL |
915 | { |
916 | struct nfs_parsed_mount_data *data; | |
917 | ||
918 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
919 | if (data) { | |
9423a08a CL |
920 | data->acregmin = NFS_DEF_ACREGMIN; |
921 | data->acregmax = NFS_DEF_ACREGMAX; | |
922 | data->acdirmin = NFS_DEF_ACDIRMIN; | |
923 | data->acdirmax = NFS_DEF_ACDIRMAX; | |
c5811dbd | 924 | data->mount_server.port = NFS_UNSPEC_PORT; |
9423a08a | 925 | data->nfs_server.port = NFS_UNSPEC_PORT; |
c5811dbd | 926 | data->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
a3f73c27 | 927 | data->selected_flavor = RPC_AUTH_MAXFLAVOR; |
9423a08a | 928 | data->minorversion = 0; |
b72e4f42 | 929 | data->need_mount = true; |
9937347a | 930 | data->net = current->nsproxy->net_ns; |
8a0d551a | 931 | security_init_mnt_opts(&data->lsm_opts); |
9423a08a CL |
932 | } |
933 | return data; | |
934 | } | |
935 | ||
8a0d551a JL |
936 | static void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data *data) |
937 | { | |
938 | if (data) { | |
939 | kfree(data->client_address); | |
940 | kfree(data->mount_server.hostname); | |
941 | kfree(data->nfs_server.export_path); | |
942 | kfree(data->nfs_server.hostname); | |
943 | kfree(data->fscache_uniq); | |
944 | security_free_mnt_opts(&data->lsm_opts); | |
945 | kfree(data); | |
946 | } | |
947 | } | |
948 | ||
fc50d58f | 949 | /* |
cdcd7f9a CL |
950 | * Sanity-check a server address provided by the mount command. |
951 | * | |
952 | * Address family must be initialized, and address must not be | |
953 | * the ANY address for that family. | |
fc50d58f CL |
954 | */ |
955 | static int nfs_verify_server_address(struct sockaddr *addr) | |
956 | { | |
957 | switch (addr->sa_family) { | |
958 | case AF_INET: { | |
cdcd7f9a | 959 | struct sockaddr_in *sa = (struct sockaddr_in *)addr; |
e6f1cebf | 960 | return sa->sin_addr.s_addr != htonl(INADDR_ANY); |
cdcd7f9a CL |
961 | } |
962 | case AF_INET6: { | |
963 | struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr; | |
964 | return !ipv6_addr_any(sa); | |
fc50d58f CL |
965 | } |
966 | } | |
967 | ||
53a0b9c4 | 968 | dfprintk(MOUNT, "NFS: Invalid IP address specified\n"); |
fc50d58f CL |
969 | return 0; |
970 | } | |
971 | ||
4cfd74fc CL |
972 | /* |
973 | * Select between a default port value and a user-specified port value. | |
974 | * If a zero value is set, then autobind will be used. | |
975 | */ | |
f5855fec | 976 | static void nfs_set_port(struct sockaddr *sap, int *port, |
4cfd74fc CL |
977 | const unsigned short default_port) |
978 | { | |
f5855fec TM |
979 | if (*port == NFS_UNSPEC_PORT) |
980 | *port = default_port; | |
4cfd74fc | 981 | |
f5855fec | 982 | rpc_set_port(sap, *port); |
4cfd74fc CL |
983 | } |
984 | ||
259875ef TM |
985 | /* |
986 | * Sanity check the NFS transport protocol. | |
987 | * | |
988 | */ | |
989 | static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
990 | { | |
991 | switch (mnt->nfs_server.protocol) { | |
992 | case XPRT_TRANSPORT_UDP: | |
993 | case XPRT_TRANSPORT_TCP: | |
994 | case XPRT_TRANSPORT_RDMA: | |
995 | break; | |
996 | default: | |
997 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; | |
998 | } | |
999 | } | |
1000 | ||
1001 | /* | |
1002 | * For text based NFSv2/v3 mounts, the mount protocol transport default | |
1003 | * settings should depend upon the specified NFS transport. | |
1004 | */ | |
1005 | static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
1006 | { | |
1007 | nfs_validate_transport_protocol(mnt); | |
1008 | ||
1009 | if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP || | |
1010 | mnt->mount_server.protocol == XPRT_TRANSPORT_TCP) | |
1011 | return; | |
1012 | switch (mnt->nfs_server.protocol) { | |
1013 | case XPRT_TRANSPORT_UDP: | |
1014 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; | |
1015 | break; | |
1016 | case XPRT_TRANSPORT_TCP: | |
1017 | case XPRT_TRANSPORT_RDMA: | |
1018 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; | |
1019 | } | |
1020 | } | |
1021 | ||
4d4b69dd WAA |
1022 | /* |
1023 | * Add 'flavor' to 'auth_info' if not already present. | |
1024 | * Returns true if 'flavor' ends up in the list, false otherwise | |
1025 | */ | |
1026 | static bool nfs_auth_info_add(struct nfs_auth_info *auth_info, | |
1027 | rpc_authflavor_t flavor) | |
1028 | { | |
1029 | unsigned int i; | |
1030 | unsigned int max_flavor_len = (sizeof(auth_info->flavors) / | |
1031 | sizeof(auth_info->flavors[0])); | |
1032 | ||
1033 | /* make sure this flavor isn't already in the list */ | |
1034 | for (i = 0; i < auth_info->flavor_len; i++) { | |
1035 | if (flavor == auth_info->flavors[i]) | |
1036 | return true; | |
1037 | } | |
1038 | ||
1039 | if (auth_info->flavor_len + 1 >= max_flavor_len) { | |
1040 | dfprintk(MOUNT, "NFS: too many sec= flavors\n"); | |
1041 | return false; | |
1042 | } | |
1043 | ||
1044 | auth_info->flavors[auth_info->flavor_len++] = flavor; | |
1045 | return true; | |
1046 | } | |
1047 | ||
1048 | /* | |
1049 | * Return true if 'match' is in auth_info or auth_info is empty. | |
1050 | * Return false otherwise. | |
1051 | */ | |
1052 | bool nfs_auth_info_match(const struct nfs_auth_info *auth_info, | |
1053 | rpc_authflavor_t match) | |
1054 | { | |
1055 | int i; | |
1056 | ||
1057 | if (!auth_info->flavor_len) | |
1058 | return true; | |
1059 | ||
1060 | for (i = 0; i < auth_info->flavor_len; i++) { | |
1061 | if (auth_info->flavors[i] == match) | |
1062 | return true; | |
1063 | } | |
1064 | return false; | |
1065 | } | |
1066 | EXPORT_SYMBOL_GPL(nfs_auth_info_match); | |
1067 | ||
01060c89 CL |
1068 | /* |
1069 | * Parse the value of the 'sec=' option. | |
01060c89 CL |
1070 | */ |
1071 | static int nfs_parse_security_flavors(char *value, | |
1072 | struct nfs_parsed_mount_data *mnt) | |
1073 | { | |
1074 | substring_t args[MAX_OPT_ARGS]; | |
19e7b8d2 | 1075 | rpc_authflavor_t pseudoflavor; |
4d4b69dd | 1076 | char *p; |
01060c89 CL |
1077 | |
1078 | dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); | |
1079 | ||
4d4b69dd WAA |
1080 | while ((p = strsep(&value, ":")) != NULL) { |
1081 | switch (match_token(p, nfs_secflavor_tokens, args)) { | |
1082 | case Opt_sec_none: | |
1083 | pseudoflavor = RPC_AUTH_NULL; | |
1084 | break; | |
1085 | case Opt_sec_sys: | |
1086 | pseudoflavor = RPC_AUTH_UNIX; | |
1087 | break; | |
1088 | case Opt_sec_krb5: | |
1089 | pseudoflavor = RPC_AUTH_GSS_KRB5; | |
1090 | break; | |
1091 | case Opt_sec_krb5i: | |
1092 | pseudoflavor = RPC_AUTH_GSS_KRB5I; | |
1093 | break; | |
1094 | case Opt_sec_krb5p: | |
1095 | pseudoflavor = RPC_AUTH_GSS_KRB5P; | |
1096 | break; | |
1097 | case Opt_sec_lkey: | |
1098 | pseudoflavor = RPC_AUTH_GSS_LKEY; | |
1099 | break; | |
1100 | case Opt_sec_lkeyi: | |
1101 | pseudoflavor = RPC_AUTH_GSS_LKEYI; | |
1102 | break; | |
1103 | case Opt_sec_lkeyp: | |
1104 | pseudoflavor = RPC_AUTH_GSS_LKEYP; | |
1105 | break; | |
1106 | case Opt_sec_spkm: | |
1107 | pseudoflavor = RPC_AUTH_GSS_SPKM; | |
1108 | break; | |
1109 | case Opt_sec_spkmi: | |
1110 | pseudoflavor = RPC_AUTH_GSS_SPKMI; | |
1111 | break; | |
1112 | case Opt_sec_spkmp: | |
1113 | pseudoflavor = RPC_AUTH_GSS_SPKMP; | |
1114 | break; | |
1115 | default: | |
1116 | dfprintk(MOUNT, | |
1117 | "NFS: sec= option '%s' not recognized\n", p); | |
1118 | return 0; | |
1119 | } | |
1120 | ||
1121 | if (!nfs_auth_info_add(&mnt->auth_info, pseudoflavor)) | |
1122 | return 0; | |
01060c89 CL |
1123 | } |
1124 | ||
1125 | return 1; | |
1126 | } | |
1127 | ||
0d71b058 TM |
1128 | static int nfs_parse_version_string(char *string, |
1129 | struct nfs_parsed_mount_data *mnt, | |
1130 | substring_t *args) | |
1131 | { | |
1132 | mnt->flags &= ~NFS_MOUNT_VER3; | |
1133 | switch (match_token(string, nfs_vers_tokens, args)) { | |
1134 | case Opt_vers_2: | |
1135 | mnt->version = 2; | |
1136 | break; | |
1137 | case Opt_vers_3: | |
1138 | mnt->flags |= NFS_MOUNT_VER3; | |
1139 | mnt->version = 3; | |
1140 | break; | |
1141 | case Opt_vers_4: | |
1142 | /* Backward compatibility option. In future, | |
1143 | * the mount program should always supply | |
1144 | * a NFSv4 minor version number. | |
1145 | */ | |
1146 | mnt->version = 4; | |
1147 | break; | |
1148 | case Opt_vers_4_0: | |
1149 | mnt->version = 4; | |
1150 | mnt->minorversion = 0; | |
1151 | break; | |
1152 | case Opt_vers_4_1: | |
1153 | mnt->version = 4; | |
1154 | mnt->minorversion = 1; | |
1155 | break; | |
42c2c424 SD |
1156 | case Opt_vers_4_2: |
1157 | mnt->version = 4; | |
1158 | mnt->minorversion = 2; | |
1159 | break; | |
0d71b058 TM |
1160 | default: |
1161 | return 0; | |
1162 | } | |
1163 | return 1; | |
1164 | } | |
1165 | ||
c5cb09b6 RL |
1166 | static int nfs_get_option_str(substring_t args[], char **option) |
1167 | { | |
1168 | kfree(*option); | |
1169 | *option = match_strdup(args); | |
e25fbe38 | 1170 | return !*option; |
c5cb09b6 RL |
1171 | } |
1172 | ||
1173 | static int nfs_get_option_ul(substring_t args[], unsigned long *option) | |
1174 | { | |
1175 | int rc; | |
1176 | char *string; | |
1177 | ||
1178 | string = match_strdup(args); | |
1179 | if (string == NULL) | |
1180 | return -ENOMEM; | |
7297cb68 | 1181 | rc = kstrtoul(string, 10, option); |
c5cb09b6 RL |
1182 | kfree(string); |
1183 | ||
1184 | return rc; | |
1185 | } | |
1186 | ||
bf0fd768 CL |
1187 | /* |
1188 | * Error-check and convert a string of mount options from user space into | |
f45663ce CL |
1189 | * a data structure. The whole mount string is processed; bad options are |
1190 | * skipped as they are encountered. If there were no errors, return 1; | |
1191 | * otherwise return 0 (zero). | |
bf0fd768 CL |
1192 | */ |
1193 | static int nfs_parse_mount_options(char *raw, | |
1194 | struct nfs_parsed_mount_data *mnt) | |
1195 | { | |
f9c3a380 | 1196 | char *p, *string, *secdata; |
d23c45fd | 1197 | int rc, sloppy = 0, invalid_option = 0; |
ee671b01 JL |
1198 | unsigned short protofamily = AF_UNSPEC; |
1199 | unsigned short mountfamily = AF_UNSPEC; | |
bf0fd768 CL |
1200 | |
1201 | if (!raw) { | |
1202 | dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); | |
1203 | return 1; | |
1204 | } | |
1205 | dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); | |
1206 | ||
f9c3a380 EP |
1207 | secdata = alloc_secdata(); |
1208 | if (!secdata) | |
1209 | goto out_nomem; | |
1210 | ||
1211 | rc = security_sb_copy_data(raw, secdata); | |
1212 | if (rc) | |
1213 | goto out_security_failure; | |
1214 | ||
1215 | rc = security_sb_parse_opts_str(secdata, &mnt->lsm_opts); | |
1216 | if (rc) | |
1217 | goto out_security_failure; | |
1218 | ||
1219 | free_secdata(secdata); | |
1220 | ||
bf0fd768 CL |
1221 | while ((p = strsep(&raw, ",")) != NULL) { |
1222 | substring_t args[MAX_OPT_ARGS]; | |
a5a16bae CL |
1223 | unsigned long option; |
1224 | int token; | |
bf0fd768 CL |
1225 | |
1226 | if (!*p) | |
1227 | continue; | |
1228 | ||
1229 | dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); | |
1230 | ||
1231 | token = match_token(p, nfs_mount_option_tokens, args); | |
1232 | switch (token) { | |
f45663ce CL |
1233 | |
1234 | /* | |
1235 | * boolean options: foo/nofoo | |
1236 | */ | |
bf0fd768 CL |
1237 | case Opt_soft: |
1238 | mnt->flags |= NFS_MOUNT_SOFT; | |
1239 | break; | |
1240 | case Opt_hard: | |
1241 | mnt->flags &= ~NFS_MOUNT_SOFT; | |
1242 | break; | |
bf0fd768 CL |
1243 | case Opt_posix: |
1244 | mnt->flags |= NFS_MOUNT_POSIX; | |
1245 | break; | |
1246 | case Opt_noposix: | |
1247 | mnt->flags &= ~NFS_MOUNT_POSIX; | |
1248 | break; | |
1249 | case Opt_cto: | |
1250 | mnt->flags &= ~NFS_MOUNT_NOCTO; | |
1251 | break; | |
1252 | case Opt_nocto: | |
1253 | mnt->flags |= NFS_MOUNT_NOCTO; | |
1254 | break; | |
1255 | case Opt_ac: | |
1256 | mnt->flags &= ~NFS_MOUNT_NOAC; | |
1257 | break; | |
1258 | case Opt_noac: | |
1259 | mnt->flags |= NFS_MOUNT_NOAC; | |
1260 | break; | |
1261 | case Opt_lock: | |
1262 | mnt->flags &= ~NFS_MOUNT_NONLM; | |
5eebde23 SJ |
1263 | mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | |
1264 | NFS_MOUNT_LOCAL_FCNTL); | |
bf0fd768 CL |
1265 | break; |
1266 | case Opt_nolock: | |
1267 | mnt->flags |= NFS_MOUNT_NONLM; | |
5eebde23 SJ |
1268 | mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | |
1269 | NFS_MOUNT_LOCAL_FCNTL); | |
bf0fd768 | 1270 | break; |
bf0fd768 CL |
1271 | case Opt_udp: |
1272 | mnt->flags &= ~NFS_MOUNT_TCP; | |
0896a725 | 1273 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 CL |
1274 | break; |
1275 | case Opt_tcp: | |
1276 | mnt->flags |= NFS_MOUNT_TCP; | |
0896a725 | 1277 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1278 | break; |
2cf7ff7a TT |
1279 | case Opt_rdma: |
1280 | mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ | |
1281 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 1282 | xprt_load_transport(p); |
2cf7ff7a | 1283 | break; |
bf0fd768 CL |
1284 | case Opt_acl: |
1285 | mnt->flags &= ~NFS_MOUNT_NOACL; | |
1286 | break; | |
1287 | case Opt_noacl: | |
1288 | mnt->flags |= NFS_MOUNT_NOACL; | |
1289 | break; | |
1290 | case Opt_rdirplus: | |
1291 | mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; | |
1292 | break; | |
1293 | case Opt_nordirplus: | |
1294 | mnt->flags |= NFS_MOUNT_NORDIRPLUS; | |
1295 | break; | |
75180df2 TM |
1296 | case Opt_sharecache: |
1297 | mnt->flags &= ~NFS_MOUNT_UNSHARED; | |
1298 | break; | |
1299 | case Opt_nosharecache: | |
1300 | mnt->flags |= NFS_MOUNT_UNSHARED; | |
1301 | break; | |
d740351b CL |
1302 | case Opt_resvport: |
1303 | mnt->flags &= ~NFS_MOUNT_NORESVPORT; | |
1304 | break; | |
1305 | case Opt_noresvport: | |
1306 | mnt->flags |= NFS_MOUNT_NORESVPORT; | |
1307 | break; | |
b797cac7 DH |
1308 | case Opt_fscache: |
1309 | mnt->options |= NFS_OPTION_FSCACHE; | |
1310 | kfree(mnt->fscache_uniq); | |
1311 | mnt->fscache_uniq = NULL; | |
1312 | break; | |
1313 | case Opt_nofscache: | |
1314 | mnt->options &= ~NFS_OPTION_FSCACHE; | |
1315 | kfree(mnt->fscache_uniq); | |
1316 | mnt->fscache_uniq = NULL; | |
1317 | break; | |
89652617 CL |
1318 | case Opt_migration: |
1319 | mnt->options |= NFS_OPTION_MIGRATION; | |
1320 | break; | |
1321 | case Opt_nomigration: | |
1322 | mnt->options &= NFS_OPTION_MIGRATION; | |
1323 | break; | |
bf0fd768 | 1324 | |
f45663ce CL |
1325 | /* |
1326 | * options that take numeric values | |
1327 | */ | |
bf0fd768 | 1328 | case Opt_port: |
c5cb09b6 RL |
1329 | if (nfs_get_option_ul(args, &option) || |
1330 | option > USHRT_MAX) | |
d23c45fd CL |
1331 | goto out_invalid_value; |
1332 | mnt->nfs_server.port = option; | |
bf0fd768 CL |
1333 | break; |
1334 | case Opt_rsize: | |
c5cb09b6 | 1335 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1336 | goto out_invalid_value; |
1337 | mnt->rsize = option; | |
bf0fd768 CL |
1338 | break; |
1339 | case Opt_wsize: | |
c5cb09b6 | 1340 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1341 | goto out_invalid_value; |
1342 | mnt->wsize = option; | |
bf0fd768 CL |
1343 | break; |
1344 | case Opt_bsize: | |
c5cb09b6 | 1345 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1346 | goto out_invalid_value; |
1347 | mnt->bsize = option; | |
bf0fd768 CL |
1348 | break; |
1349 | case Opt_timeo: | |
c5cb09b6 | 1350 | if (nfs_get_option_ul(args, &option) || option == 0) |
d23c45fd CL |
1351 | goto out_invalid_value; |
1352 | mnt->timeo = option; | |
bf0fd768 CL |
1353 | break; |
1354 | case Opt_retrans: | |
c5cb09b6 | 1355 | if (nfs_get_option_ul(args, &option) || option == 0) |
d23c45fd CL |
1356 | goto out_invalid_value; |
1357 | mnt->retrans = option; | |
bf0fd768 CL |
1358 | break; |
1359 | case Opt_acregmin: | |
c5cb09b6 | 1360 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1361 | goto out_invalid_value; |
1362 | mnt->acregmin = option; | |
bf0fd768 CL |
1363 | break; |
1364 | case Opt_acregmax: | |
c5cb09b6 | 1365 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1366 | goto out_invalid_value; |
1367 | mnt->acregmax = option; | |
bf0fd768 CL |
1368 | break; |
1369 | case Opt_acdirmin: | |
c5cb09b6 | 1370 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1371 | goto out_invalid_value; |
1372 | mnt->acdirmin = option; | |
bf0fd768 CL |
1373 | break; |
1374 | case Opt_acdirmax: | |
c5cb09b6 | 1375 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1376 | goto out_invalid_value; |
1377 | mnt->acdirmax = option; | |
bf0fd768 CL |
1378 | break; |
1379 | case Opt_actimeo: | |
c5cb09b6 | 1380 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1381 | goto out_invalid_value; |
1382 | mnt->acregmin = mnt->acregmax = | |
1383 | mnt->acdirmin = mnt->acdirmax = option; | |
bf0fd768 CL |
1384 | break; |
1385 | case Opt_namelen: | |
c5cb09b6 | 1386 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1387 | goto out_invalid_value; |
1388 | mnt->namlen = option; | |
bf0fd768 CL |
1389 | break; |
1390 | case Opt_mountport: | |
c5cb09b6 RL |
1391 | if (nfs_get_option_ul(args, &option) || |
1392 | option > USHRT_MAX) | |
d23c45fd CL |
1393 | goto out_invalid_value; |
1394 | mnt->mount_server.port = option; | |
bf0fd768 | 1395 | break; |
bf0fd768 | 1396 | case Opt_mountvers: |
c5cb09b6 | 1397 | if (nfs_get_option_ul(args, &option) || |
f45663ce | 1398 | option < NFS_MNT_VERSION || |
d23c45fd CL |
1399 | option > NFS_MNT3_VERSION) |
1400 | goto out_invalid_value; | |
1401 | mnt->mount_server.version = option; | |
bf0fd768 | 1402 | break; |
3fd5be9e | 1403 | case Opt_minorversion: |
c5cb09b6 | 1404 | if (nfs_get_option_ul(args, &option)) |
f3f4f4ed CL |
1405 | goto out_invalid_value; |
1406 | if (option > NFS4_MAX_MINOR_VERSION) | |
1407 | goto out_invalid_value; | |
1408 | mnt->minorversion = option; | |
3fd5be9e | 1409 | break; |
bf0fd768 | 1410 | |
f45663ce CL |
1411 | /* |
1412 | * options that take text values | |
1413 | */ | |
0d71b058 TM |
1414 | case Opt_nfsvers: |
1415 | string = match_strdup(args); | |
1416 | if (string == NULL) | |
1417 | goto out_nomem; | |
1418 | rc = nfs_parse_version_string(string, mnt, args); | |
1419 | kfree(string); | |
1420 | if (!rc) | |
1421 | goto out_invalid_value; | |
1422 | break; | |
bf0fd768 CL |
1423 | case Opt_sec: |
1424 | string = match_strdup(args); | |
1425 | if (string == NULL) | |
1426 | goto out_nomem; | |
01060c89 | 1427 | rc = nfs_parse_security_flavors(string, mnt); |
bf0fd768 | 1428 | kfree(string); |
f45663ce | 1429 | if (!rc) { |
f45663ce CL |
1430 | dfprintk(MOUNT, "NFS: unrecognized " |
1431 | "security flavor\n"); | |
d23c45fd | 1432 | return 0; |
f45663ce | 1433 | } |
bf0fd768 CL |
1434 | break; |
1435 | case Opt_proto: | |
1436 | string = match_strdup(args); | |
1437 | if (string == NULL) | |
1438 | goto out_nomem; | |
1439 | token = match_token(string, | |
1440 | nfs_xprt_protocol_tokens, args); | |
bf0fd768 | 1441 | |
ee671b01 | 1442 | protofamily = AF_INET; |
bf0fd768 | 1443 | switch (token) { |
ee671b01 JL |
1444 | case Opt_xprt_udp6: |
1445 | protofamily = AF_INET6; | |
fdb66ff4 | 1446 | case Opt_xprt_udp: |
bf0fd768 | 1447 | mnt->flags &= ~NFS_MOUNT_TCP; |
0896a725 | 1448 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 | 1449 | break; |
ee671b01 JL |
1450 | case Opt_xprt_tcp6: |
1451 | protofamily = AF_INET6; | |
fdb66ff4 | 1452 | case Opt_xprt_tcp: |
bf0fd768 | 1453 | mnt->flags |= NFS_MOUNT_TCP; |
0896a725 | 1454 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1455 | break; |
2cf7ff7a TT |
1456 | case Opt_xprt_rdma: |
1457 | /* vector side protocols to TCP */ | |
1458 | mnt->flags |= NFS_MOUNT_TCP; | |
1459 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 1460 | xprt_load_transport(string); |
2cf7ff7a | 1461 | break; |
bf0fd768 | 1462 | default: |
f45663ce CL |
1463 | dfprintk(MOUNT, "NFS: unrecognized " |
1464 | "transport protocol\n"); | |
4223a4a1 | 1465 | kfree(string); |
d23c45fd | 1466 | return 0; |
bf0fd768 | 1467 | } |
c5cb09b6 | 1468 | kfree(string); |
bf0fd768 CL |
1469 | break; |
1470 | case Opt_mountproto: | |
1471 | string = match_strdup(args); | |
1472 | if (string == NULL) | |
1473 | goto out_nomem; | |
1474 | token = match_token(string, | |
1475 | nfs_xprt_protocol_tokens, args); | |
d508afb4 | 1476 | kfree(string); |
bf0fd768 | 1477 | |
ee671b01 | 1478 | mountfamily = AF_INET; |
bf0fd768 | 1479 | switch (token) { |
ee671b01 JL |
1480 | case Opt_xprt_udp6: |
1481 | mountfamily = AF_INET6; | |
fdb66ff4 | 1482 | case Opt_xprt_udp: |
0896a725 | 1483 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 | 1484 | break; |
ee671b01 JL |
1485 | case Opt_xprt_tcp6: |
1486 | mountfamily = AF_INET6; | |
fdb66ff4 | 1487 | case Opt_xprt_tcp: |
0896a725 | 1488 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1489 | break; |
2cf7ff7a | 1490 | case Opt_xprt_rdma: /* not used for side protocols */ |
bf0fd768 | 1491 | default: |
f45663ce CL |
1492 | dfprintk(MOUNT, "NFS: unrecognized " |
1493 | "transport protocol\n"); | |
d23c45fd | 1494 | return 0; |
bf0fd768 CL |
1495 | } |
1496 | break; | |
1497 | case Opt_addr: | |
1498 | string = match_strdup(args); | |
1499 | if (string == NULL) | |
1500 | goto out_nomem; | |
53a0b9c4 | 1501 | mnt->nfs_server.addrlen = |
b48e1278 | 1502 | rpc_pton(mnt->net, string, strlen(string), |
53a0b9c4 CL |
1503 | (struct sockaddr *) |
1504 | &mnt->nfs_server.address, | |
1505 | sizeof(mnt->nfs_server.address)); | |
bf0fd768 | 1506 | kfree(string); |
53a0b9c4 CL |
1507 | if (mnt->nfs_server.addrlen == 0) |
1508 | goto out_invalid_address; | |
bf0fd768 CL |
1509 | break; |
1510 | case Opt_clientaddr: | |
c5cb09b6 | 1511 | if (nfs_get_option_str(args, &mnt->client_address)) |
bf0fd768 | 1512 | goto out_nomem; |
bf0fd768 | 1513 | break; |
33832034 | 1514 | case Opt_mounthost: |
c5cb09b6 RL |
1515 | if (nfs_get_option_str(args, |
1516 | &mnt->mount_server.hostname)) | |
33832034 | 1517 | goto out_nomem; |
33832034 | 1518 | break; |
0ac83779 | 1519 | case Opt_mountaddr: |
bf0fd768 CL |
1520 | string = match_strdup(args); |
1521 | if (string == NULL) | |
1522 | goto out_nomem; | |
53a0b9c4 | 1523 | mnt->mount_server.addrlen = |
b48e1278 | 1524 | rpc_pton(mnt->net, string, strlen(string), |
53a0b9c4 CL |
1525 | (struct sockaddr *) |
1526 | &mnt->mount_server.address, | |
1527 | sizeof(mnt->mount_server.address)); | |
bf0fd768 | 1528 | kfree(string); |
53a0b9c4 CL |
1529 | if (mnt->mount_server.addrlen == 0) |
1530 | goto out_invalid_address; | |
bf0fd768 | 1531 | break; |
7973c1f1 TM |
1532 | case Opt_lookupcache: |
1533 | string = match_strdup(args); | |
1534 | if (string == NULL) | |
1535 | goto out_nomem; | |
1536 | token = match_token(string, | |
1537 | nfs_lookupcache_tokens, args); | |
1538 | kfree(string); | |
1539 | switch (token) { | |
1540 | case Opt_lookupcache_all: | |
1541 | mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); | |
1542 | break; | |
1543 | case Opt_lookupcache_positive: | |
1544 | mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1545 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; | |
1546 | break; | |
1547 | case Opt_lookupcache_none: | |
1548 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1549 | break; | |
1550 | default: | |
7973c1f1 TM |
1551 | dfprintk(MOUNT, "NFS: invalid " |
1552 | "lookupcache argument\n"); | |
d23c45fd | 1553 | return 0; |
7973c1f1 TM |
1554 | }; |
1555 | break; | |
a6d5ff64 | 1556 | case Opt_fscache_uniq: |
c5cb09b6 | 1557 | if (nfs_get_option_str(args, &mnt->fscache_uniq)) |
a6d5ff64 | 1558 | goto out_nomem; |
a6d5ff64 CL |
1559 | mnt->options |= NFS_OPTION_FSCACHE; |
1560 | break; | |
5eebde23 SJ |
1561 | case Opt_local_lock: |
1562 | string = match_strdup(args); | |
1563 | if (string == NULL) | |
1564 | goto out_nomem; | |
1565 | token = match_token(string, nfs_local_lock_tokens, | |
1566 | args); | |
1567 | kfree(string); | |
1568 | switch (token) { | |
1569 | case Opt_local_lock_all: | |
1570 | mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | | |
1571 | NFS_MOUNT_LOCAL_FCNTL); | |
1572 | break; | |
1573 | case Opt_local_lock_flock: | |
1574 | mnt->flags |= NFS_MOUNT_LOCAL_FLOCK; | |
1575 | break; | |
1576 | case Opt_local_lock_posix: | |
1577 | mnt->flags |= NFS_MOUNT_LOCAL_FCNTL; | |
1578 | break; | |
1579 | case Opt_local_lock_none: | |
1580 | mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | | |
1581 | NFS_MOUNT_LOCAL_FCNTL); | |
1582 | break; | |
1583 | default: | |
1584 | dfprintk(MOUNT, "NFS: invalid " | |
1585 | "local_lock argument\n"); | |
1586 | return 0; | |
1587 | }; | |
1588 | break; | |
bf0fd768 | 1589 | |
f45663ce CL |
1590 | /* |
1591 | * Special options | |
1592 | */ | |
1593 | case Opt_sloppy: | |
1594 | sloppy = 1; | |
1595 | dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); | |
1596 | break; | |
bf0fd768 CL |
1597 | case Opt_userspace: |
1598 | case Opt_deprecated: | |
d33e4dfe CL |
1599 | dfprintk(MOUNT, "NFS: ignoring mount option " |
1600 | "'%s'\n", p); | |
bf0fd768 CL |
1601 | break; |
1602 | ||
1603 | default: | |
d23c45fd | 1604 | invalid_option = 1; |
f45663ce CL |
1605 | dfprintk(MOUNT, "NFS: unrecognized mount option " |
1606 | "'%s'\n", p); | |
bf0fd768 CL |
1607 | } |
1608 | } | |
1609 | ||
d23c45fd CL |
1610 | if (!sloppy && invalid_option) |
1611 | return 0; | |
1612 | ||
571b7554 WAA |
1613 | if (mnt->minorversion && mnt->version != 4) |
1614 | goto out_minorversion_mismatch; | |
1615 | ||
89652617 | 1616 | if (mnt->options & NFS_OPTION_MIGRATION && |
9e08ef1a | 1617 | (mnt->version != 4 || mnt->minorversion != 0)) |
89652617 CL |
1618 | goto out_migration_misuse; |
1619 | ||
ee671b01 JL |
1620 | /* |
1621 | * verify that any proto=/mountproto= options match the address | |
1856b225 | 1622 | * families in the addr=/mountaddr= options. |
ee671b01 JL |
1623 | */ |
1624 | if (protofamily != AF_UNSPEC && | |
1625 | protofamily != mnt->nfs_server.address.ss_family) | |
1626 | goto out_proto_mismatch; | |
1627 | ||
1628 | if (mountfamily != AF_UNSPEC) { | |
1629 | if (mnt->mount_server.addrlen) { | |
1630 | if (mountfamily != mnt->mount_server.address.ss_family) | |
1631 | goto out_mountproto_mismatch; | |
1632 | } else { | |
1633 | if (mountfamily != mnt->nfs_server.address.ss_family) | |
1634 | goto out_mountproto_mismatch; | |
1635 | } | |
1636 | } | |
1637 | ||
bf0fd768 CL |
1638 | return 1; |
1639 | ||
ee671b01 JL |
1640 | out_mountproto_mismatch: |
1641 | printk(KERN_INFO "NFS: mount server address does not match mountproto= " | |
1642 | "option\n"); | |
1643 | return 0; | |
1644 | out_proto_mismatch: | |
1645 | printk(KERN_INFO "NFS: server address does not match proto= option\n"); | |
1646 | return 0; | |
53a0b9c4 CL |
1647 | out_invalid_address: |
1648 | printk(KERN_INFO "NFS: bad IP address specified: %s\n", p); | |
1649 | return 0; | |
d23c45fd | 1650 | out_invalid_value: |
53a0b9c4 | 1651 | printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); |
d23c45fd | 1652 | return 0; |
571b7554 WAA |
1653 | out_minorversion_mismatch: |
1654 | printk(KERN_INFO "NFS: mount option vers=%u does not support " | |
1655 | "minorversion=%u\n", mnt->version, mnt->minorversion); | |
1656 | return 0; | |
89652617 CL |
1657 | out_migration_misuse: |
1658 | printk(KERN_INFO | |
1659 | "NFS: 'migration' not supported for this NFS version\n"); | |
1660 | return 0; | |
bf0fd768 CL |
1661 | out_nomem: |
1662 | printk(KERN_INFO "NFS: not enough memory to parse option\n"); | |
1663 | return 0; | |
f9c3a380 EP |
1664 | out_security_failure: |
1665 | free_secdata(secdata); | |
1666 | printk(KERN_INFO "NFS: security options invalid: %d\n", rc); | |
1667 | return 0; | |
bf0fd768 CL |
1668 | } |
1669 | ||
ec88f28d | 1670 | /* |
4d4b69dd WAA |
1671 | * Ensure that a specified authtype in args->auth_info is supported by |
1672 | * the server. Returns 0 and sets args->selected_flavor if it's ok, and | |
1673 | * -EACCES if not. | |
ec88f28d | 1674 | */ |
4d4b69dd | 1675 | static int nfs_verify_authflavors(struct nfs_parsed_mount_data *args, |
9111c95b | 1676 | rpc_authflavor_t *server_authlist, unsigned int count) |
ec88f28d | 1677 | { |
4d4b69dd | 1678 | rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; |
9111c95b | 1679 | unsigned int i; |
4580a92d | 1680 | |
d497ab97 WAA |
1681 | /* |
1682 | * If the sec= mount option is used, the specified flavor or AUTH_NULL | |
1683 | * must be in the list returned by the server. | |
1684 | * | |
1685 | * AUTH_NULL has a special meaning when it's in the server list - it | |
1686 | * means that the server will ignore the rpc creds, so any flavor | |
1687 | * can be used. | |
1688 | */ | |
4580a92d | 1689 | for (i = 0; i < count; i++) { |
4d4b69dd WAA |
1690 | flavor = server_authlist[i]; |
1691 | ||
1692 | if (nfs_auth_info_match(&args->auth_info, flavor) || | |
1693 | flavor == RPC_AUTH_NULL) | |
9111c95b | 1694 | goto out; |
4580a92d | 1695 | } |
ec88f28d | 1696 | |
4d4b69dd WAA |
1697 | dfprintk(MOUNT, |
1698 | "NFS: specified auth flavors not supported by server\n"); | |
9111c95b | 1699 | return -EACCES; |
d497ab97 | 1700 | |
4580a92d | 1701 | out: |
4d4b69dd | 1702 | args->selected_flavor = flavor; |
a3f73c27 | 1703 | dfprintk(MOUNT, "NFS: using auth flavor %u\n", args->selected_flavor); |
d497ab97 | 1704 | return 0; |
ec88f28d CL |
1705 | } |
1706 | ||
0076d7b7 CL |
1707 | /* |
1708 | * Use the remote server's MOUNT service to request the NFS file handle | |
1709 | * corresponding to the provided path. | |
1710 | */ | |
486aa699 | 1711 | static int nfs_request_mount(struct nfs_parsed_mount_data *args, |
294ae81d JL |
1712 | struct nfs_fh *root_fh, |
1713 | rpc_authflavor_t *server_authlist, | |
1714 | unsigned int *server_authlist_len) | |
0076d7b7 | 1715 | { |
c5d120f8 CL |
1716 | struct nfs_mount_request request = { |
1717 | .sap = (struct sockaddr *) | |
1718 | &args->mount_server.address, | |
1719 | .dirpath = args->nfs_server.export_path, | |
1720 | .protocol = args->mount_server.protocol, | |
1721 | .fh = root_fh, | |
50a737f8 | 1722 | .noresvport = args->flags & NFS_MOUNT_NORESVPORT, |
294ae81d | 1723 | .auth_flav_len = server_authlist_len, |
ec88f28d | 1724 | .auth_flavs = server_authlist, |
6d59b8d5 | 1725 | .net = args->net, |
c5d120f8 | 1726 | }; |
4c568017 | 1727 | int status; |
0076d7b7 CL |
1728 | |
1729 | if (args->mount_server.version == 0) { | |
8a6e5deb TM |
1730 | switch (args->version) { |
1731 | default: | |
1732 | args->mount_server.version = NFS_MNT3_VERSION; | |
1733 | break; | |
1734 | case 2: | |
1735 | args->mount_server.version = NFS_MNT_VERSION; | |
1736 | } | |
0076d7b7 | 1737 | } |
c5d120f8 | 1738 | request.version = args->mount_server.version; |
0076d7b7 | 1739 | |
33832034 | 1740 | if (args->mount_server.hostname) |
c5d120f8 | 1741 | request.hostname = args->mount_server.hostname; |
33832034 | 1742 | else |
c5d120f8 | 1743 | request.hostname = args->nfs_server.hostname; |
33832034 | 1744 | |
0076d7b7 CL |
1745 | /* |
1746 | * Construct the mount server's address. | |
1747 | */ | |
4c568017 | 1748 | if (args->mount_server.address.ss_family == AF_UNSPEC) { |
c5d120f8 | 1749 | memcpy(request.sap, &args->nfs_server.address, |
4c568017 CL |
1750 | args->nfs_server.addrlen); |
1751 | args->mount_server.addrlen = args->nfs_server.addrlen; | |
1752 | } | |
c5d120f8 | 1753 | request.salen = args->mount_server.addrlen; |
f5855fec | 1754 | nfs_set_port(request.sap, &args->mount_server.port, 0); |
0076d7b7 CL |
1755 | |
1756 | /* | |
1757 | * Now ask the mount server to map our export path | |
1758 | * to a file handle. | |
1759 | */ | |
c5d120f8 | 1760 | status = nfs_mount(&request); |
ec88f28d CL |
1761 | if (status != 0) { |
1762 | dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n", | |
1763 | request.hostname, status); | |
1764 | return status; | |
1765 | } | |
0076d7b7 | 1766 | |
9111c95b | 1767 | return 0; |
0076d7b7 CL |
1768 | } |
1769 | ||
d17540c6 JL |
1770 | static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_info, |
1771 | struct nfs_subversion *nfs_mod) | |
1772 | { | |
1773 | int status; | |
9111c95b JL |
1774 | unsigned int i; |
1775 | bool tried_auth_unix = false; | |
1776 | bool auth_null_in_list = false; | |
1777 | struct nfs_server *server = ERR_PTR(-EACCES); | |
294ae81d JL |
1778 | struct nfs_parsed_mount_data *args = mount_info->parsed; |
1779 | rpc_authflavor_t authlist[NFS_MAX_SECFLAVORS]; | |
1780 | unsigned int authlist_len = ARRAY_SIZE(authlist); | |
d17540c6 | 1781 | |
294ae81d JL |
1782 | status = nfs_request_mount(args, mount_info->mntfh, authlist, |
1783 | &authlist_len); | |
d17540c6 JL |
1784 | if (status) |
1785 | return ERR_PTR(status); | |
1786 | ||
9111c95b JL |
1787 | /* |
1788 | * Was a sec= authflavor specified in the options? First, verify | |
1789 | * whether the server supports it, and then just try to use it if so. | |
1790 | */ | |
a3f73c27 | 1791 | if (args->auth_info.flavor_len > 0) { |
4d4b69dd | 1792 | status = nfs_verify_authflavors(args, authlist, authlist_len); |
a3f73c27 WAA |
1793 | dfprintk(MOUNT, "NFS: using auth flavor %u\n", |
1794 | args->selected_flavor); | |
9111c95b JL |
1795 | if (status) |
1796 | return ERR_PTR(status); | |
1797 | return nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); | |
1798 | } | |
1799 | ||
1800 | /* | |
1801 | * No sec= option was provided. RFC 2623, section 2.7 suggests we | |
1802 | * SHOULD prefer the flavor listed first. However, some servers list | |
1803 | * AUTH_NULL first. Avoid ever choosing AUTH_NULL. | |
1804 | */ | |
1805 | for (i = 0; i < authlist_len; ++i) { | |
1806 | rpc_authflavor_t flavor; | |
1807 | struct rpcsec_gss_info info; | |
1808 | ||
1809 | flavor = authlist[i]; | |
1810 | switch (flavor) { | |
1811 | case RPC_AUTH_UNIX: | |
1812 | tried_auth_unix = true; | |
1813 | break; | |
1814 | case RPC_AUTH_NULL: | |
1815 | auth_null_in_list = true; | |
1816 | continue; | |
1817 | default: | |
1818 | if (rpcauth_get_gssinfo(flavor, &info) != 0) | |
1819 | continue; | |
1820 | /* Fallthrough */ | |
1821 | } | |
1822 | dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", flavor); | |
a3f73c27 | 1823 | args->selected_flavor = flavor; |
9111c95b JL |
1824 | server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); |
1825 | if (!IS_ERR(server)) | |
1826 | return server; | |
1827 | } | |
1828 | ||
1829 | /* | |
1830 | * Nothing we tried so far worked. At this point, give up if we've | |
1831 | * already tried AUTH_UNIX or if the server's list doesn't contain | |
1832 | * AUTH_NULL | |
1833 | */ | |
1834 | if (tried_auth_unix || !auth_null_in_list) | |
1835 | return server; | |
1836 | ||
1837 | /* Last chance! Try AUTH_UNIX */ | |
1838 | dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", RPC_AUTH_UNIX); | |
a3f73c27 | 1839 | args->selected_flavor = RPC_AUTH_UNIX; |
d17540c6 JL |
1840 | return nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); |
1841 | } | |
1842 | ||
ff9099f2 BS |
1843 | struct dentry *nfs_try_mount(int flags, const char *dev_name, |
1844 | struct nfs_mount_info *mount_info, | |
1845 | struct nfs_subversion *nfs_mod) | |
486aa699 | 1846 | { |
486aa699 BS |
1847 | struct nfs_server *server; |
1848 | ||
d17540c6 JL |
1849 | if (mount_info->parsed->need_mount) |
1850 | server = nfs_try_mount_request(mount_info, nfs_mod); | |
1851 | else | |
1852 | server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); | |
486aa699 | 1853 | |
486aa699 BS |
1854 | if (IS_ERR(server)) |
1855 | return ERR_CAST(server); | |
1856 | ||
ab7017a3 | 1857 | return nfs_fs_mount_common(server, flags, dev_name, mount_info, nfs_mod); |
486aa699 | 1858 | } |
ddda8e0a | 1859 | EXPORT_SYMBOL_GPL(nfs_try_mount); |
486aa699 | 1860 | |
c12bacec RL |
1861 | /* |
1862 | * Split "dev_name" into "hostname:export_path". | |
1863 | * | |
1864 | * The leftmost colon demarks the split between the server's hostname | |
1865 | * and the export path. If the hostname starts with a left square | |
1866 | * bracket, then it may contain colons. | |
1867 | * | |
1868 | * Note: caller frees hostname and export path, even on error. | |
1869 | */ | |
1870 | static int nfs_parse_devname(const char *dev_name, | |
1871 | char **hostname, size_t maxnamlen, | |
1872 | char **export_path, size_t maxpathlen) | |
dc045898 CL |
1873 | { |
1874 | size_t len; | |
c12bacec | 1875 | char *end; |
dc045898 | 1876 | |
c12bacec RL |
1877 | /* Is the host name protected with square brakcets? */ |
1878 | if (*dev_name == '[') { | |
1879 | end = strchr(++dev_name, ']'); | |
1880 | if (end == NULL || end[1] != ':') | |
dc045898 | 1881 | goto out_bad_devname; |
dc045898 | 1882 | |
c12bacec RL |
1883 | len = end - dev_name; |
1884 | end++; | |
1885 | } else { | |
1886 | char *comma; | |
dc045898 | 1887 | |
c12bacec RL |
1888 | end = strchr(dev_name, ':'); |
1889 | if (end == NULL) | |
1890 | goto out_bad_devname; | |
1891 | len = end - dev_name; | |
d1aa0825 | 1892 | |
c12bacec RL |
1893 | /* kill possible hostname list: not supported */ |
1894 | comma = strchr(dev_name, ','); | |
1895 | if (comma != NULL && comma < end) | |
1896 | *comma = 0; | |
1897 | } | |
d1aa0825 | 1898 | |
d1aa0825 CL |
1899 | if (len > maxnamlen) |
1900 | goto out_hostname; | |
1901 | ||
1902 | /* N.B. caller will free nfs_server.hostname in all cases */ | |
c12bacec | 1903 | *hostname = kstrndup(dev_name, len, GFP_KERNEL); |
d1aa0825 CL |
1904 | if (*hostname == NULL) |
1905 | goto out_nomem; | |
c12bacec | 1906 | len = strlen(++end); |
d1aa0825 CL |
1907 | if (len > maxpathlen) |
1908 | goto out_path; | |
1909 | *export_path = kstrndup(end, len, GFP_KERNEL); | |
1910 | if (!*export_path) | |
1911 | goto out_nomem; | |
1912 | ||
c12bacec | 1913 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path); |
d1aa0825 CL |
1914 | return 0; |
1915 | ||
1916 | out_bad_devname: | |
1917 | dfprintk(MOUNT, "NFS: device name not in host:path format\n"); | |
1918 | return -EINVAL; | |
1919 | ||
1920 | out_nomem: | |
1921 | dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); | |
1922 | return -ENOMEM; | |
1923 | ||
1924 | out_hostname: | |
1925 | dfprintk(MOUNT, "NFS: server hostname too long\n"); | |
1926 | return -ENAMETOOLONG; | |
1927 | ||
1928 | out_path: | |
1929 | dfprintk(MOUNT, "NFS: export pathname too long\n"); | |
1930 | return -ENAMETOOLONG; | |
1931 | } | |
1932 | ||
f7b422b1 | 1933 | /* |
54ceac45 DH |
1934 | * Validate the NFS2/NFS3 mount data |
1935 | * - fills in the mount root filehandle | |
136d558c CL |
1936 | * |
1937 | * For option strings, user space handles the following behaviors: | |
1938 | * | |
1939 | * + DNS: mapping server host name to IP address ("addr=" option) | |
1940 | * | |
1941 | * + failure mode: how to behave if a mount request can't be handled | |
1942 | * immediately ("fg/bg" option) | |
1943 | * | |
1944 | * + retry: how often to retry a mount request ("retry=" option) | |
1945 | * | |
1946 | * + breaking back: trying proto=udp after proto=tcp, v2 after v3, | |
1947 | * mountproto=tcp after mountproto=udp, and so on | |
f7b422b1 | 1948 | */ |
d72c727c BS |
1949 | static int nfs23_validate_mount_data(void *options, |
1950 | struct nfs_parsed_mount_data *args, | |
1951 | struct nfs_fh *mntfh, | |
1952 | const char *dev_name) | |
f7b422b1 | 1953 | { |
2283f8d6 | 1954 | struct nfs_mount_data *data = (struct nfs_mount_data *)options; |
4cfd74fc | 1955 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; |
74c98811 | 1956 | int extra_flags = NFS_MOUNT_LEGACY_INTERFACE; |
136d558c | 1957 | |
5df36e78 CL |
1958 | if (data == NULL) |
1959 | goto out_no_data; | |
f7b422b1 | 1960 | |
c5afc8da | 1961 | args->version = NFS_DEFAULT_VERSION; |
54ceac45 | 1962 | switch (data->version) { |
5df36e78 CL |
1963 | case 1: |
1964 | data->namlen = 0; | |
1965 | case 2: | |
1966 | data->bsize = 0; | |
1967 | case 3: | |
1968 | if (data->flags & NFS_MOUNT_VER3) | |
1969 | goto out_no_v3; | |
1970 | data->root.size = NFS2_FHSIZE; | |
1971 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
74c98811 TM |
1972 | /* Turn off security negotiation */ |
1973 | extra_flags |= NFS_MOUNT_SECFLAVOUR; | |
5df36e78 CL |
1974 | case 4: |
1975 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
1976 | goto out_no_sec; | |
1977 | case 5: | |
1978 | memset(data->context, 0, sizeof(data->context)); | |
1979 | case 6: | |
b7e24457 TM |
1980 | if (data->flags & NFS_MOUNT_VER3) { |
1981 | if (data->root.size > NFS3_FHSIZE || data->root.size == 0) | |
1982 | goto out_invalid_fh; | |
5df36e78 | 1983 | mntfh->size = data->root.size; |
764302cc CL |
1984 | args->version = 3; |
1985 | } else { | |
5df36e78 | 1986 | mntfh->size = NFS2_FHSIZE; |
764302cc CL |
1987 | args->version = 2; |
1988 | } | |
5df36e78 | 1989 | |
5df36e78 CL |
1990 | |
1991 | memcpy(mntfh->data, data->root.data, mntfh->size); | |
1992 | if (mntfh->size < sizeof(mntfh->data)) | |
1993 | memset(mntfh->data + mntfh->size, 0, | |
1994 | sizeof(mntfh->data) - mntfh->size); | |
6e88e061 | 1995 | |
2283f8d6 TT |
1996 | /* |
1997 | * Translate to nfs_parsed_mount_data, which nfs_fill_super | |
1998 | * can deal with. | |
1999 | */ | |
ff3525a5 | 2000 | args->flags = data->flags & NFS_MOUNT_FLAGMASK; |
74c98811 | 2001 | args->flags |= extra_flags; |
2283f8d6 TT |
2002 | args->rsize = data->rsize; |
2003 | args->wsize = data->wsize; | |
2283f8d6 TT |
2004 | args->timeo = data->timeo; |
2005 | args->retrans = data->retrans; | |
2006 | args->acregmin = data->acregmin; | |
2007 | args->acregmax = data->acregmax; | |
2008 | args->acdirmin = data->acdirmin; | |
2009 | args->acdirmax = data->acdirmax; | |
b72e4f42 | 2010 | args->need_mount = false; |
4c568017 | 2011 | |
4cfd74fc | 2012 | memcpy(sap, &data->addr, sizeof(data->addr)); |
4c568017 | 2013 | args->nfs_server.addrlen = sizeof(data->addr); |
872ece86 | 2014 | args->nfs_server.port = ntohs(data->addr.sin_port); |
4cfd74fc | 2015 | if (!nfs_verify_server_address(sap)) |
4c568017 CL |
2016 | goto out_no_address; |
2017 | ||
2283f8d6 | 2018 | if (!(data->flags & NFS_MOUNT_TCP)) |
0896a725 | 2019 | args->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
2283f8d6 TT |
2020 | /* N.B. caller will free nfs_server.hostname in all cases */ |
2021 | args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); | |
2022 | args->namlen = data->namlen; | |
2023 | args->bsize = data->bsize; | |
dd07c947 CL |
2024 | |
2025 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
a3f73c27 | 2026 | args->selected_flavor = data->pseudoflavor; |
74c98811 | 2027 | else |
a3f73c27 | 2028 | args->selected_flavor = RPC_AUTH_UNIX; |
63649bd7 CG |
2029 | if (!args->nfs_server.hostname) |
2030 | goto out_nomem; | |
f9c3a380 | 2031 | |
5eebde23 SJ |
2032 | if (!(data->flags & NFS_MOUNT_NONLM)) |
2033 | args->flags &= ~(NFS_MOUNT_LOCAL_FLOCK| | |
2034 | NFS_MOUNT_LOCAL_FCNTL); | |
2035 | else | |
2036 | args->flags |= (NFS_MOUNT_LOCAL_FLOCK| | |
2037 | NFS_MOUNT_LOCAL_FCNTL); | |
f9c3a380 EP |
2038 | /* |
2039 | * The legacy version 6 binary mount data from userspace has a | |
2040 | * field used only to transport selinux information into the | |
2041 | * the kernel. To continue to support that functionality we | |
2042 | * have a touch of selinux knowledge here in the NFS code. The | |
2043 | * userspace code converted context=blah to just blah so we are | |
2044 | * converting back to the full string selinux understands. | |
2045 | */ | |
2046 | if (data->context[0]){ | |
2047 | #ifdef CONFIG_SECURITY_SELINUX | |
2048 | int rc; | |
2049 | char *opts_str = kmalloc(sizeof(data->context) + 8, GFP_KERNEL); | |
2050 | if (!opts_str) | |
2051 | return -ENOMEM; | |
2052 | strcpy(opts_str, "context="); | |
2053 | data->context[NFS_MAX_CONTEXT_LEN] = '\0'; | |
2054 | strcat(opts_str, &data->context[0]); | |
2055 | rc = security_sb_parse_opts_str(opts_str, &args->lsm_opts); | |
2056 | kfree(opts_str); | |
2057 | if (rc) | |
2058 | return rc; | |
2059 | #else | |
2060 | return -EINVAL; | |
2061 | #endif | |
2062 | } | |
2063 | ||
5df36e78 | 2064 | break; |
b72e4f42 BS |
2065 | default: |
2066 | return NFS_TEXT_DATA; | |
f7b422b1 | 2067 | } |
54ceac45 | 2068 | |
1c606fb7 | 2069 | #if !IS_ENABLED(CONFIG_NFS_V3) |
8a6e5deb | 2070 | if (args->version == 3) |
5df36e78 CL |
2071 | goto out_v3_not_compiled; |
2072 | #endif /* !CONFIG_NFS_V3 */ | |
f7b422b1 | 2073 | |
5df36e78 | 2074 | return 0; |
f7b422b1 | 2075 | |
5df36e78 CL |
2076 | out_no_data: |
2077 | dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); | |
2078 | return -EINVAL; | |
54ceac45 | 2079 | |
5df36e78 CL |
2080 | out_no_v3: |
2081 | dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", | |
2082 | data->version); | |
2083 | return -EINVAL; | |
f7b422b1 | 2084 | |
5df36e78 CL |
2085 | out_no_sec: |
2086 | dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); | |
2087 | return -EINVAL; | |
2088 | ||
1c606fb7 | 2089 | #if !IS_ENABLED(CONFIG_NFS_V3) |
5df36e78 CL |
2090 | out_v3_not_compiled: |
2091 | dfprintk(MOUNT, "NFS: NFSv3 is not compiled into kernel\n"); | |
2092 | return -EPROTONOSUPPORT; | |
2093 | #endif /* !CONFIG_NFS_V3 */ | |
2094 | ||
63649bd7 CG |
2095 | out_nomem: |
2096 | dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); | |
2097 | return -ENOMEM; | |
2098 | ||
5df36e78 CL |
2099 | out_no_address: |
2100 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); | |
2101 | return -EINVAL; | |
2102 | ||
2103 | out_invalid_fh: | |
2104 | dfprintk(MOUNT, "NFS: invalid root filehandle\n"); | |
2105 | return -EINVAL; | |
f7b422b1 DH |
2106 | } |
2107 | ||
89d77c8f | 2108 | #if IS_ENABLED(CONFIG_NFS_V4) |
d72c727c BS |
2109 | static int nfs_validate_mount_data(struct file_system_type *fs_type, |
2110 | void *options, | |
2111 | struct nfs_parsed_mount_data *args, | |
2112 | struct nfs_fh *mntfh, | |
2113 | const char *dev_name) | |
2114 | { | |
2115 | if (fs_type == &nfs_fs_type) | |
2116 | return nfs23_validate_mount_data(options, args, mntfh, dev_name); | |
2117 | return nfs4_validate_mount_data(options, args, dev_name); | |
2118 | } | |
2119 | #else | |
2120 | static int nfs_validate_mount_data(struct file_system_type *fs_type, | |
2121 | void *options, | |
2122 | struct nfs_parsed_mount_data *args, | |
2123 | struct nfs_fh *mntfh, | |
2124 | const char *dev_name) | |
2125 | { | |
2126 | return nfs23_validate_mount_data(options, args, mntfh, dev_name); | |
2127 | } | |
2128 | #endif | |
2129 | ||
b72e4f42 BS |
2130 | static int nfs_validate_text_mount_data(void *options, |
2131 | struct nfs_parsed_mount_data *args, | |
2132 | const char *dev_name) | |
2133 | { | |
2134 | int port = 0; | |
2135 | int max_namelen = PAGE_SIZE; | |
2136 | int max_pathlen = NFS_MAXPATHLEN; | |
2137 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; | |
2138 | ||
2139 | if (nfs_parse_mount_options((char *)options, args) == 0) | |
2140 | return -EINVAL; | |
2141 | ||
2142 | if (!nfs_verify_server_address(sap)) | |
2143 | goto out_no_address; | |
2144 | ||
2145 | if (args->version == 4) { | |
89d77c8f | 2146 | #if IS_ENABLED(CONFIG_NFS_V4) |
b72e4f42 BS |
2147 | port = NFS_PORT; |
2148 | max_namelen = NFS4_MAXNAMLEN; | |
2149 | max_pathlen = NFS4_MAXPATHLEN; | |
2150 | nfs_validate_transport_protocol(args); | |
6da1a034 TM |
2151 | if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) |
2152 | goto out_invalid_transport_udp; | |
b72e4f42 BS |
2153 | nfs4_validate_mount_flags(args); |
2154 | #else | |
2155 | goto out_v4_not_compiled; | |
2156 | #endif /* CONFIG_NFS_V4 */ | |
2157 | } else | |
2158 | nfs_set_mount_transport_protocol(args); | |
2159 | ||
2160 | nfs_set_port(sap, &args->nfs_server.port, port); | |
2161 | ||
b72e4f42 BS |
2162 | return nfs_parse_devname(dev_name, |
2163 | &args->nfs_server.hostname, | |
2164 | max_namelen, | |
2165 | &args->nfs_server.export_path, | |
2166 | max_pathlen); | |
2167 | ||
89d77c8f | 2168 | #if !IS_ENABLED(CONFIG_NFS_V4) |
b72e4f42 BS |
2169 | out_v4_not_compiled: |
2170 | dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); | |
2171 | return -EPROTONOSUPPORT; | |
6da1a034 TM |
2172 | #else |
2173 | out_invalid_transport_udp: | |
2174 | dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); | |
2175 | return -EINVAL; | |
b72e4f42 BS |
2176 | #endif /* !CONFIG_NFS_V4 */ |
2177 | ||
2178 | out_no_address: | |
2179 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); | |
2180 | return -EINVAL; | |
b72e4f42 BS |
2181 | } |
2182 | ||
48b605f8 JL |
2183 | static int |
2184 | nfs_compare_remount_data(struct nfs_server *nfss, | |
2185 | struct nfs_parsed_mount_data *data) | |
2186 | { | |
2187 | if (data->flags != nfss->flags || | |
2188 | data->rsize != nfss->rsize || | |
2189 | data->wsize != nfss->wsize || | |
57acc40d JL |
2190 | data->version != nfss->nfs_client->rpc_ops->version || |
2191 | data->minorversion != nfss->nfs_client->cl_minorversion || | |
48b605f8 | 2192 | data->retrans != nfss->client->cl_timeout->to_retries || |
a3f73c27 | 2193 | data->selected_flavor != nfss->client->cl_auth->au_flavor || |
48b605f8 JL |
2194 | data->acregmin != nfss->acregmin / HZ || |
2195 | data->acregmax != nfss->acregmax / HZ || | |
2196 | data->acdirmin != nfss->acdirmin / HZ || | |
2197 | data->acdirmax != nfss->acdirmax / HZ || | |
2198 | data->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) || | |
bcd2ea17 | 2199 | data->nfs_server.port != nfss->port || |
48b605f8 | 2200 | data->nfs_server.addrlen != nfss->nfs_client->cl_addrlen || |
a1be9eee SR |
2201 | !rpc_cmp_addr((struct sockaddr *)&data->nfs_server.address, |
2202 | (struct sockaddr *)&nfss->nfs_client->cl_addr)) | |
48b605f8 JL |
2203 | return -EINVAL; |
2204 | ||
2205 | return 0; | |
2206 | } | |
2207 | ||
fbdefd64 | 2208 | int |
48b605f8 JL |
2209 | nfs_remount(struct super_block *sb, int *flags, char *raw_data) |
2210 | { | |
2211 | int error; | |
2212 | struct nfs_server *nfss = sb->s_fs_info; | |
2213 | struct nfs_parsed_mount_data *data; | |
2214 | struct nfs_mount_data *options = (struct nfs_mount_data *)raw_data; | |
2215 | struct nfs4_mount_data *options4 = (struct nfs4_mount_data *)raw_data; | |
cd100725 | 2216 | u32 nfsvers = nfss->nfs_client->rpc_ops->version; |
48b605f8 JL |
2217 | |
2218 | /* | |
2219 | * Userspace mount programs that send binary options generally send | |
2220 | * them populated with default values. We have no way to know which | |
2221 | * ones were explicitly specified. Fall back to legacy behavior and | |
2222 | * just return success. | |
2223 | */ | |
31c94469 MZ |
2224 | if ((nfsvers == 4 && (!options4 || options4->version == 1)) || |
2225 | (nfsvers <= 3 && (!options || (options->version >= 1 && | |
2226 | options->version <= 6)))) | |
48b605f8 JL |
2227 | return 0; |
2228 | ||
2229 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2230 | if (data == NULL) | |
2231 | return -ENOMEM; | |
2232 | ||
2233 | /* fill out struct with values from existing mount */ | |
2234 | data->flags = nfss->flags; | |
2235 | data->rsize = nfss->rsize; | |
2236 | data->wsize = nfss->wsize; | |
2237 | data->retrans = nfss->client->cl_timeout->to_retries; | |
a3f73c27 | 2238 | data->selected_flavor = nfss->client->cl_auth->au_flavor; |
0f5f49b8 | 2239 | data->auth_info = nfss->auth_info; |
48b605f8 JL |
2240 | data->acregmin = nfss->acregmin / HZ; |
2241 | data->acregmax = nfss->acregmax / HZ; | |
2242 | data->acdirmin = nfss->acdirmin / HZ; | |
2243 | data->acdirmax = nfss->acdirmax / HZ; | |
2244 | data->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; | |
bcd2ea17 | 2245 | data->nfs_server.port = nfss->port; |
48b605f8 | 2246 | data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; |
57acc40d JL |
2247 | data->version = nfsvers; |
2248 | data->minorversion = nfss->nfs_client->cl_minorversion; | |
48b605f8 JL |
2249 | memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr, |
2250 | data->nfs_server.addrlen); | |
2251 | ||
2252 | /* overwrite those values with any that were specified */ | |
1966903f JL |
2253 | error = -EINVAL; |
2254 | if (!nfs_parse_mount_options((char *)options, data)) | |
48b605f8 JL |
2255 | goto out; |
2256 | ||
26c4c170 JL |
2257 | /* |
2258 | * noac is a special case. It implies -o sync, but that's not | |
2259 | * necessarily reflected in the mtab options. do_remount_sb | |
2260 | * will clear MS_SYNCHRONOUS if -o sync wasn't specified in the | |
2261 | * remount options, so we have to explicitly reset it. | |
2262 | */ | |
2263 | if (data->flags & NFS_MOUNT_NOAC) | |
2264 | *flags |= MS_SYNCHRONOUS; | |
2265 | ||
48b605f8 JL |
2266 | /* compare new mount options with old ones */ |
2267 | error = nfs_compare_remount_data(nfss, data); | |
2268 | out: | |
2269 | kfree(data); | |
2270 | return error; | |
2271 | } | |
89d77c8f | 2272 | EXPORT_SYMBOL_GPL(nfs_remount); |
48b605f8 | 2273 | |
f7b422b1 | 2274 | /* |
54ceac45 | 2275 | * Initialise the common bits of the superblock |
f7b422b1 | 2276 | */ |
fbdefd64 | 2277 | inline void nfs_initialise_sb(struct super_block *sb) |
f7b422b1 | 2278 | { |
54ceac45 | 2279 | struct nfs_server *server = NFS_SB(sb); |
5006a76c | 2280 | |
54ceac45 | 2281 | sb->s_magic = NFS_SUPER_MAGIC; |
f7b422b1 | 2282 | |
54ceac45 DH |
2283 | /* We probably want something more informative here */ |
2284 | snprintf(sb->s_id, sizeof(sb->s_id), | |
5a7c9eec | 2285 | "%u:%u", MAJOR(sb->s_dev), MINOR(sb->s_dev)); |
5006a76c | 2286 | |
54ceac45 DH |
2287 | if (sb->s_blocksize == 0) |
2288 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
2289 | &sb->s_blocksize_bits); | |
f7b422b1 | 2290 | |
32a88aa1 JA |
2291 | sb->s_bdi = &server->backing_dev_info; |
2292 | ||
54ceac45 | 2293 | nfs_super_set_maxbytes(sb, server->maxfilesize); |
f7b422b1 DH |
2294 | } |
2295 | ||
2296 | /* | |
54ceac45 | 2297 | * Finish setting up an NFS2/3 superblock |
f7b422b1 | 2298 | */ |
fbdefd64 | 2299 | void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_info) |
f7b422b1 | 2300 | { |
c40f8d1d | 2301 | struct nfs_parsed_mount_data *data = mount_info->parsed; |
f7b422b1 | 2302 | struct nfs_server *server = NFS_SB(sb); |
5006a76c | 2303 | |
54ceac45 DH |
2304 | sb->s_blocksize_bits = 0; |
2305 | sb->s_blocksize = 0; | |
6a74490d BS |
2306 | sb->s_xattr = server->nfs_client->cl_nfs_mod->xattr; |
2307 | sb->s_op = server->nfs_client->cl_nfs_mod->sops; | |
2308 | if (data && data->bsize) | |
54ceac45 | 2309 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); |
f7b422b1 | 2310 | |
6a74490d | 2311 | if (server->nfs_client->rpc_ops->version != 2) { |
54ceac45 DH |
2312 | /* The VFS shouldn't apply the umask to mode bits. We will do |
2313 | * so ourselves when necessary. | |
2314 | */ | |
2315 | sb->s_flags |= MS_POSIXACL; | |
2316 | sb->s_time_gran = 1; | |
816724e6 | 2317 | } |
54ceac45 | 2318 | |
54ceac45 | 2319 | nfs_initialise_sb(sb); |
f7b422b1 | 2320 | } |
89d77c8f | 2321 | EXPORT_SYMBOL_GPL(nfs_fill_super); |
f7b422b1 DH |
2322 | |
2323 | /* | |
3cadf4b8 | 2324 | * Finish setting up a cloned NFS2/3/4 superblock |
f7b422b1 | 2325 | */ |
fbdefd64 | 2326 | void nfs_clone_super(struct super_block *sb, struct nfs_mount_info *mount_info) |
f7b422b1 | 2327 | { |
8c958e0c | 2328 | const struct super_block *old_sb = mount_info->cloned->sb; |
54ceac45 DH |
2329 | struct nfs_server *server = NFS_SB(sb); |
2330 | ||
2331 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; | |
2332 | sb->s_blocksize = old_sb->s_blocksize; | |
2333 | sb->s_maxbytes = old_sb->s_maxbytes; | |
3cadf4b8 BS |
2334 | sb->s_xattr = old_sb->s_xattr; |
2335 | sb->s_op = old_sb->s_op; | |
2336 | sb->s_time_gran = 1; | |
f7b422b1 | 2337 | |
3cadf4b8 | 2338 | if (server->nfs_client->rpc_ops->version != 2) { |
54ceac45 DH |
2339 | /* The VFS shouldn't apply the umask to mode bits. We will do |
2340 | * so ourselves when necessary. | |
f7b422b1 DH |
2341 | */ |
2342 | sb->s_flags |= MS_POSIXACL; | |
f7b422b1 DH |
2343 | } |
2344 | ||
54ceac45 | 2345 | nfs_initialise_sb(sb); |
f7b422b1 DH |
2346 | } |
2347 | ||
0aea92bf TM |
2348 | #define NFS_MOUNT_CMP_FLAGMASK ~(NFS_MOUNT_INTR \ |
2349 | | NFS_MOUNT_SECURE \ | |
2350 | | NFS_MOUNT_TCP \ | |
2351 | | NFS_MOUNT_VER3 \ | |
2352 | | NFS_MOUNT_KERBEROS \ | |
2353 | | NFS_MOUNT_NONLM \ | |
2354 | | NFS_MOUNT_BROKEN_SUID \ | |
2355 | | NFS_MOUNT_STRICTLOCK \ | |
2356 | | NFS_MOUNT_UNSHARED \ | |
2357 | | NFS_MOUNT_NORESVPORT \ | |
2358 | | NFS_MOUNT_LEGACY_INTERFACE) | |
2359 | ||
275a5d24 TM |
2360 | static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags) |
2361 | { | |
2362 | const struct nfs_server *a = s->s_fs_info; | |
2363 | const struct rpc_clnt *clnt_a = a->client; | |
2364 | const struct rpc_clnt *clnt_b = b->client; | |
2365 | ||
2366 | if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK)) | |
2367 | goto Ebusy; | |
2368 | if (a->nfs_client != b->nfs_client) | |
2369 | goto Ebusy; | |
0aea92bf | 2370 | if ((a->flags ^ b->flags) & NFS_MOUNT_CMP_FLAGMASK) |
275a5d24 TM |
2371 | goto Ebusy; |
2372 | if (a->wsize != b->wsize) | |
2373 | goto Ebusy; | |
2374 | if (a->rsize != b->rsize) | |
2375 | goto Ebusy; | |
2376 | if (a->acregmin != b->acregmin) | |
2377 | goto Ebusy; | |
2378 | if (a->acregmax != b->acregmax) | |
2379 | goto Ebusy; | |
2380 | if (a->acdirmin != b->acdirmin) | |
2381 | goto Ebusy; | |
2382 | if (a->acdirmax != b->acdirmax) | |
2383 | goto Ebusy; | |
5837f6df | 2384 | if (b->auth_info.flavor_len > 0 && |
0aea92bf | 2385 | clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) |
275a5d24 | 2386 | goto Ebusy; |
e89a5a43 | 2387 | return 1; |
275a5d24 | 2388 | Ebusy: |
e89a5a43 TM |
2389 | return 0; |
2390 | } | |
2391 | ||
2392 | struct nfs_sb_mountdata { | |
2393 | struct nfs_server *server; | |
2394 | int mntflags; | |
2395 | }; | |
2396 | ||
2397 | static int nfs_set_super(struct super_block *s, void *data) | |
2398 | { | |
2399 | struct nfs_sb_mountdata *sb_mntdata = data; | |
2400 | struct nfs_server *server = sb_mntdata->server; | |
2401 | int ret; | |
2402 | ||
2403 | s->s_flags = sb_mntdata->mntflags; | |
2404 | s->s_fs_info = server; | |
8b244ff2 | 2405 | s->s_d_op = server->nfs_client->rpc_ops->dentry_ops; |
e89a5a43 TM |
2406 | ret = set_anon_super(s, server); |
2407 | if (ret == 0) | |
2408 | server->s_dev = s->s_dev; | |
2409 | return ret; | |
2410 | } | |
2411 | ||
fd00a8ff CL |
2412 | static int nfs_compare_super_address(struct nfs_server *server1, |
2413 | struct nfs_server *server2) | |
2414 | { | |
2415 | struct sockaddr *sap1, *sap2; | |
2416 | ||
2417 | sap1 = (struct sockaddr *)&server1->nfs_client->cl_addr; | |
2418 | sap2 = (struct sockaddr *)&server2->nfs_client->cl_addr; | |
2419 | ||
2420 | if (sap1->sa_family != sap2->sa_family) | |
2421 | return 0; | |
2422 | ||
2423 | switch (sap1->sa_family) { | |
2424 | case AF_INET: { | |
2425 | struct sockaddr_in *sin1 = (struct sockaddr_in *)sap1; | |
2426 | struct sockaddr_in *sin2 = (struct sockaddr_in *)sap2; | |
2427 | if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) | |
2428 | return 0; | |
2429 | if (sin1->sin_port != sin2->sin_port) | |
2430 | return 0; | |
2431 | break; | |
2432 | } | |
2433 | case AF_INET6: { | |
2434 | struct sockaddr_in6 *sin1 = (struct sockaddr_in6 *)sap1; | |
2435 | struct sockaddr_in6 *sin2 = (struct sockaddr_in6 *)sap2; | |
2436 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) | |
2437 | return 0; | |
2438 | if (sin1->sin6_port != sin2->sin6_port) | |
2439 | return 0; | |
2440 | break; | |
2441 | } | |
2442 | default: | |
2443 | return 0; | |
2444 | } | |
2445 | ||
2446 | return 1; | |
2447 | } | |
2448 | ||
e89a5a43 TM |
2449 | static int nfs_compare_super(struct super_block *sb, void *data) |
2450 | { | |
2451 | struct nfs_sb_mountdata *sb_mntdata = data; | |
2452 | struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb); | |
2453 | int mntflags = sb_mntdata->mntflags; | |
2454 | ||
fd00a8ff | 2455 | if (!nfs_compare_super_address(old, server)) |
e89a5a43 TM |
2456 | return 0; |
2457 | /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */ | |
2458 | if (old->flags & NFS_MOUNT_UNSHARED) | |
2459 | return 0; | |
2460 | if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0) | |
2461 | return 0; | |
2462 | return nfs_compare_mount_options(sb, server, mntflags); | |
275a5d24 TM |
2463 | } |
2464 | ||
39ffb921 | 2465 | #ifdef CONFIG_NFS_FSCACHE |
2311b943 BS |
2466 | static void nfs_get_cache_cookie(struct super_block *sb, |
2467 | struct nfs_parsed_mount_data *parsed, | |
2468 | struct nfs_clone_mount *cloned) | |
2469 | { | |
c4271c6e | 2470 | struct nfs_server *nfss = NFS_SB(sb); |
2311b943 BS |
2471 | char *uniq = NULL; |
2472 | int ulen = 0; | |
2473 | ||
c4271c6e TM |
2474 | nfss->fscache_key = NULL; |
2475 | nfss->fscache = NULL; | |
2476 | ||
2477 | if (parsed) { | |
2478 | if (!(parsed->options & NFS_OPTION_FSCACHE)) | |
2479 | return; | |
2480 | if (parsed->fscache_uniq) { | |
2481 | uniq = parsed->fscache_uniq; | |
2482 | ulen = strlen(parsed->fscache_uniq); | |
2483 | } | |
2311b943 BS |
2484 | } else if (cloned) { |
2485 | struct nfs_server *mnt_s = NFS_SB(cloned->sb); | |
c4271c6e TM |
2486 | if (!(mnt_s->options & NFS_OPTION_FSCACHE)) |
2487 | return; | |
2311b943 BS |
2488 | if (mnt_s->fscache_key) { |
2489 | uniq = mnt_s->fscache_key->key.uniquifier; | |
2490 | ulen = mnt_s->fscache_key->key.uniq_len; | |
2491 | }; | |
c4271c6e TM |
2492 | } else |
2493 | return; | |
2311b943 BS |
2494 | |
2495 | nfs_fscache_get_super_cookie(sb, uniq, ulen); | |
2496 | } | |
39ffb921 TM |
2497 | #else |
2498 | static void nfs_get_cache_cookie(struct super_block *sb, | |
2499 | struct nfs_parsed_mount_data *parsed, | |
2500 | struct nfs_clone_mount *cloned) | |
2501 | { | |
2502 | } | |
2503 | #endif | |
2311b943 | 2504 | |
fa799759 MS |
2505 | static int nfs_bdi_register(struct nfs_server *server) |
2506 | { | |
2507 | return bdi_register_dev(&server->backing_dev_info, server->s_dev); | |
2508 | } | |
2509 | ||
fbdefd64 BS |
2510 | int nfs_set_sb_security(struct super_block *s, struct dentry *mntroot, |
2511 | struct nfs_mount_info *mount_info) | |
3d176e3f | 2512 | { |
aa9c2669 DQ |
2513 | int error; |
2514 | unsigned long kflags = 0, kflags_out = 0; | |
2515 | if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL) | |
2516 | kflags |= SECURITY_LSM_NATIVE_LABELS; | |
2517 | ||
2518 | error = security_sb_set_mnt_opts(s, &mount_info->parsed->lsm_opts, | |
2519 | kflags, &kflags_out); | |
2520 | if (error) | |
2521 | goto err; | |
2522 | ||
2523 | if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL && | |
2524 | !(kflags_out & SECURITY_LSM_NATIVE_LABELS)) | |
2525 | NFS_SB(s)->caps &= ~NFS_CAP_SECURITY_LABEL; | |
2526 | err: | |
2527 | return error; | |
3d176e3f | 2528 | } |
89d77c8f | 2529 | EXPORT_SYMBOL_GPL(nfs_set_sb_security); |
3d176e3f | 2530 | |
fbdefd64 BS |
2531 | int nfs_clone_sb_security(struct super_block *s, struct dentry *mntroot, |
2532 | struct nfs_mount_info *mount_info) | |
3d176e3f BS |
2533 | { |
2534 | /* clone any lsm security options from the parent to the new sb */ | |
3d176e3f BS |
2535 | if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) |
2536 | return -ESTALE; | |
094f7b69 | 2537 | return security_sb_clone_mnt_opts(mount_info->cloned->sb, s); |
3d176e3f | 2538 | } |
89d77c8f | 2539 | EXPORT_SYMBOL_GPL(nfs_clone_sb_security); |
3d176e3f | 2540 | |
ab7017a3 | 2541 | struct dentry *nfs_fs_mount_common(struct nfs_server *server, |
fbdefd64 | 2542 | int flags, const char *dev_name, |
ab7017a3 BS |
2543 | struct nfs_mount_info *mount_info, |
2544 | struct nfs_subversion *nfs_mod) | |
f7b422b1 | 2545 | { |
f7b422b1 | 2546 | struct super_block *s; |
01194981 | 2547 | struct dentry *mntroot = ERR_PTR(-ENOMEM); |
75180df2 | 2548 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2549 | struct nfs_sb_mountdata sb_mntdata = { |
2550 | .mntflags = flags, | |
c40f8d1d | 2551 | .server = server, |
e89a5a43 | 2552 | }; |
01194981 | 2553 | int error; |
33852a1f | 2554 | |
75180df2 TM |
2555 | if (server->flags & NFS_MOUNT_UNSHARED) |
2556 | compare_super = NULL; | |
2557 | ||
fb2088cc SP |
2558 | /* -o noac implies -o sync */ |
2559 | if (server->flags & NFS_MOUNT_NOAC) | |
2560 | sb_mntdata.mntflags |= MS_SYNCHRONOUS; | |
2561 | ||
e890db01 SM |
2562 | if (mount_info->cloned != NULL && mount_info->cloned->sb != NULL) |
2563 | if (mount_info->cloned->sb->s_flags & MS_SYNCHRONOUS) | |
2564 | sb_mntdata.mntflags |= MS_SYNCHRONOUS; | |
2565 | ||
54ceac45 | 2566 | /* Get a superblock - note that we may end up sharing one that already exists */ |
ab7017a3 | 2567 | s = sget(nfs_mod->nfs_fs, compare_super, nfs_set_super, flags, &sb_mntdata); |
816724e6 | 2568 | if (IS_ERR(s)) { |
01194981 | 2569 | mntroot = ERR_CAST(s); |
54ceac45 | 2570 | goto out_err_nosb; |
816724e6 TM |
2571 | } |
2572 | ||
54ceac45 DH |
2573 | if (s->s_fs_info != server) { |
2574 | nfs_free_server(server); | |
2575 | server = NULL; | |
fa799759 MS |
2576 | } else { |
2577 | error = nfs_bdi_register(server); | |
01194981 AV |
2578 | if (error) { |
2579 | mntroot = ERR_PTR(error); | |
cfbc0683 | 2580 | goto error_splat_bdi; |
01194981 | 2581 | } |
ce6cda18 | 2582 | server->super = s; |
54ceac45 | 2583 | } |
f7b422b1 | 2584 | |
54ceac45 DH |
2585 | if (!s->s_root) { |
2586 | /* initial superblock/root creation */ | |
c40f8d1d | 2587 | mount_info->fill_super(s, mount_info); |
3d176e3f | 2588 | nfs_get_cache_cookie(s, mount_info->parsed, mount_info->cloned); |
54ceac45 | 2589 | } |
f7b422b1 | 2590 | |
87c7083d | 2591 | mntroot = nfs_get_root(s, mount_info->mntfh, dev_name); |
01194981 | 2592 | if (IS_ERR(mntroot)) |
54ceac45 | 2593 | goto error_splat_super; |
816724e6 | 2594 | |
3d176e3f | 2595 | error = mount_info->set_security(s, mntroot, mount_info); |
f9c3a380 EP |
2596 | if (error) |
2597 | goto error_splat_root; | |
2598 | ||
54ceac45 | 2599 | s->s_flags |= MS_ACTIVE; |
0655960f CL |
2600 | |
2601 | out: | |
01194981 | 2602 | return mntroot; |
816724e6 | 2603 | |
54ceac45 DH |
2604 | out_err_nosb: |
2605 | nfs_free_server(server); | |
0655960f | 2606 | goto out; |
54ceac45 | 2607 | |
f9c3a380 EP |
2608 | error_splat_root: |
2609 | dput(mntroot); | |
01194981 | 2610 | mntroot = ERR_PTR(error); |
54ceac45 | 2611 | error_splat_super: |
cfbc0683 N |
2612 | if (server && !s->s_root) |
2613 | bdi_unregister(&server->backing_dev_info); | |
2614 | error_splat_bdi: | |
6f5bbff9 | 2615 | deactivate_locked_super(s); |
0655960f | 2616 | goto out; |
f7b422b1 | 2617 | } |
89d77c8f | 2618 | EXPORT_SYMBOL_GPL(nfs_fs_mount_common); |
f7b422b1 | 2619 | |
fbdefd64 | 2620 | struct dentry *nfs_fs_mount(struct file_system_type *fs_type, |
c40f8d1d BS |
2621 | int flags, const char *dev_name, void *raw_data) |
2622 | { | |
c40f8d1d BS |
2623 | struct nfs_mount_info mount_info = { |
2624 | .fill_super = nfs_fill_super, | |
3d176e3f | 2625 | .set_security = nfs_set_sb_security, |
c40f8d1d | 2626 | }; |
c40f8d1d | 2627 | struct dentry *mntroot = ERR_PTR(-ENOMEM); |
ab7017a3 | 2628 | struct nfs_subversion *nfs_mod; |
c40f8d1d BS |
2629 | int error; |
2630 | ||
46058d46 | 2631 | mount_info.parsed = nfs_alloc_parsed_mount_data(); |
87c7083d BS |
2632 | mount_info.mntfh = nfs_alloc_fhandle(); |
2633 | if (mount_info.parsed == NULL || mount_info.mntfh == NULL) | |
c40f8d1d BS |
2634 | goto out; |
2635 | ||
2636 | /* Validate the mount data */ | |
87c7083d | 2637 | error = nfs_validate_mount_data(fs_type, raw_data, mount_info.parsed, mount_info.mntfh, dev_name); |
b72e4f42 | 2638 | if (error == NFS_TEXT_DATA) |
46058d46 | 2639 | error = nfs_validate_text_mount_data(raw_data, mount_info.parsed, dev_name); |
c40f8d1d BS |
2640 | if (error < 0) { |
2641 | mntroot = ERR_PTR(error); | |
2642 | goto out; | |
2643 | } | |
c40f8d1d | 2644 | |
ab7017a3 BS |
2645 | nfs_mod = get_nfs_version(mount_info.parsed->version); |
2646 | if (IS_ERR(nfs_mod)) { | |
2647 | mntroot = ERR_CAST(nfs_mod); | |
2648 | goto out; | |
2649 | } | |
2650 | ||
ff9099f2 | 2651 | mntroot = nfs_mod->rpc_ops->try_mount(flags, dev_name, &mount_info, nfs_mod); |
ab7017a3 BS |
2652 | |
2653 | put_nfs_version(nfs_mod); | |
c40f8d1d | 2654 | out: |
46058d46 | 2655 | nfs_free_parsed_mount_data(mount_info.parsed); |
87c7083d | 2656 | nfs_free_fhandle(mount_info.mntfh); |
c40f8d1d BS |
2657 | return mntroot; |
2658 | } | |
89d77c8f | 2659 | EXPORT_SYMBOL_GPL(nfs_fs_mount); |
c40f8d1d | 2660 | |
387c149b TM |
2661 | /* |
2662 | * Ensure that we unregister the bdi before kill_anon_super | |
2663 | * releases the device name | |
2664 | */ | |
fbdefd64 | 2665 | void nfs_put_super(struct super_block *s) |
387c149b TM |
2666 | { |
2667 | struct nfs_server *server = NFS_SB(s); | |
2668 | ||
2669 | bdi_unregister(&server->backing_dev_info); | |
2670 | } | |
89d77c8f | 2671 | EXPORT_SYMBOL_GPL(nfs_put_super); |
387c149b | 2672 | |
54ceac45 DH |
2673 | /* |
2674 | * Destroy an NFS2/3 superblock | |
2675 | */ | |
fbdefd64 | 2676 | void nfs_kill_super(struct super_block *s) |
f7b422b1 DH |
2677 | { |
2678 | struct nfs_server *server = NFS_SB(s); | |
2679 | ||
2680 | kill_anon_super(s); | |
08734048 | 2681 | nfs_fscache_release_super_cookie(s); |
54ceac45 | 2682 | nfs_free_server(server); |
f7b422b1 | 2683 | } |
89d77c8f | 2684 | EXPORT_SYMBOL_GPL(nfs_kill_super); |
f7b422b1 | 2685 | |
54ceac45 | 2686 | /* |
8c958e0c | 2687 | * Clone an NFS2/3/4 server record on xdev traversal (FSID-change) |
54ceac45 | 2688 | */ |
3dd4f8ef | 2689 | static struct dentry * |
e8f25e6d BS |
2690 | nfs_xdev_mount(struct file_system_type *fs_type, int flags, |
2691 | const char *dev_name, void *raw_data) | |
f7b422b1 | 2692 | { |
e8f25e6d BS |
2693 | struct nfs_clone_mount *data = raw_data; |
2694 | struct nfs_mount_info mount_info = { | |
2695 | .fill_super = nfs_clone_super, | |
2696 | .set_security = nfs_clone_sb_security, | |
2697 | .cloned = data, | |
2698 | }; | |
54ceac45 | 2699 | struct nfs_server *server; |
3d176e3f | 2700 | struct dentry *mntroot = ERR_PTR(-ENOMEM); |
ab7017a3 | 2701 | struct nfs_subversion *nfs_mod = NFS_SB(data->sb)->nfs_client->cl_nfs_mod; |
f7b422b1 | 2702 | |
dee972b9 | 2703 | dprintk("--> nfs_xdev_mount()\n"); |
f7b422b1 | 2704 | |
e8f25e6d | 2705 | mount_info.mntfh = mount_info.cloned->fh; |
87c7083d | 2706 | |
54ceac45 | 2707 | /* create a new volume representation */ |
1179acc6 | 2708 | server = nfs_mod->rpc_ops->clone_server(NFS_SB(data->sb), data->fh, data->fattr, data->authflavor); |
f7b422b1 | 2709 | |
dee972b9 TM |
2710 | if (IS_ERR(server)) |
2711 | mntroot = ERR_CAST(server); | |
2712 | else | |
2713 | mntroot = nfs_fs_mount_common(server, flags, | |
2714 | dev_name, &mount_info, nfs_mod); | |
24c8dbbb | 2715 | |
dee972b9 TM |
2716 | dprintk("<-- nfs_xdev_mount() = %ld\n", |
2717 | IS_ERR(mntroot) ? PTR_ERR(mntroot) : 0L); | |
2718 | return mntroot; | |
f7b422b1 DH |
2719 | } |
2720 | ||
89d77c8f | 2721 | #if IS_ENABLED(CONFIG_NFS_V4) |
54ceac45 | 2722 | |
01c3f052 TM |
2723 | static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) |
2724 | { | |
5eebde23 SJ |
2725 | args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3| |
2726 | NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL); | |
01c3f052 TM |
2727 | } |
2728 | ||
f0768ebd CL |
2729 | /* |
2730 | * Validate NFSv4 mount options | |
2731 | */ | |
91ea40b9 TT |
2732 | static int nfs4_validate_mount_data(void *options, |
2733 | struct nfs_parsed_mount_data *args, | |
2734 | const char *dev_name) | |
f0768ebd | 2735 | { |
4cfd74fc | 2736 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; |
91ea40b9 | 2737 | struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; |
f0768ebd CL |
2738 | char *c; |
2739 | ||
2740 | if (data == NULL) | |
2741 | goto out_no_data; | |
2742 | ||
cdf66442 BS |
2743 | args->version = 4; |
2744 | ||
f0768ebd CL |
2745 | switch (data->version) { |
2746 | case 1: | |
4c568017 CL |
2747 | if (data->host_addrlen > sizeof(args->nfs_server.address)) |
2748 | goto out_no_address; | |
2749 | if (data->host_addrlen == 0) | |
f0768ebd | 2750 | goto out_no_address; |
4c568017 | 2751 | args->nfs_server.addrlen = data->host_addrlen; |
4cfd74fc | 2752 | if (copy_from_user(sap, data->host_addr, data->host_addrlen)) |
f0768ebd | 2753 | return -EFAULT; |
4cfd74fc | 2754 | if (!nfs_verify_server_address(sap)) |
f0768ebd | 2755 | goto out_no_address; |
872ece86 | 2756 | args->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port); |
f0768ebd | 2757 | |
6738b251 | 2758 | if (data->auth_flavourlen) { |
74c98811 | 2759 | rpc_authflavor_t pseudoflavor; |
6738b251 CL |
2760 | if (data->auth_flavourlen > 1) |
2761 | goto out_inval_auth; | |
74c98811 | 2762 | if (copy_from_user(&pseudoflavor, |
91ea40b9 | 2763 | data->auth_flavours, |
74c98811 | 2764 | sizeof(pseudoflavor))) |
f0768ebd | 2765 | return -EFAULT; |
a3f73c27 | 2766 | args->selected_flavor = pseudoflavor; |
74c98811 | 2767 | } else |
a3f73c27 | 2768 | args->selected_flavor = RPC_AUTH_UNIX; |
f0768ebd CL |
2769 | |
2770 | c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); | |
2771 | if (IS_ERR(c)) | |
2772 | return PTR_ERR(c); | |
91ea40b9 | 2773 | args->nfs_server.hostname = c; |
f0768ebd CL |
2774 | |
2775 | c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); | |
2776 | if (IS_ERR(c)) | |
2777 | return PTR_ERR(c); | |
91ea40b9 TT |
2778 | args->nfs_server.export_path = c; |
2779 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); | |
f0768ebd CL |
2780 | |
2781 | c = strndup_user(data->client_addr.data, 16); | |
2782 | if (IS_ERR(c)) | |
2783 | return PTR_ERR(c); | |
91ea40b9 TT |
2784 | args->client_address = c; |
2785 | ||
2786 | /* | |
2787 | * Translate to nfs_parsed_mount_data, which nfs4_fill_super | |
2788 | * can deal with. | |
2789 | */ | |
2790 | ||
2791 | args->flags = data->flags & NFS4_MOUNT_FLAGMASK; | |
2792 | args->rsize = data->rsize; | |
2793 | args->wsize = data->wsize; | |
2794 | args->timeo = data->timeo; | |
2795 | args->retrans = data->retrans; | |
2796 | args->acregmin = data->acregmin; | |
2797 | args->acregmax = data->acregmax; | |
2798 | args->acdirmin = data->acdirmin; | |
2799 | args->acdirmax = data->acdirmax; | |
2800 | args->nfs_server.protocol = data->proto; | |
259875ef | 2801 | nfs_validate_transport_protocol(args); |
6da1a034 TM |
2802 | if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) |
2803 | goto out_invalid_transport_udp; | |
f0768ebd CL |
2804 | |
2805 | break; | |
7630c852 | 2806 | default: |
b72e4f42 | 2807 | return NFS_TEXT_DATA; |
f0768ebd CL |
2808 | } |
2809 | ||
2810 | return 0; | |
2811 | ||
2812 | out_no_data: | |
2813 | dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); | |
2814 | return -EINVAL; | |
2815 | ||
2816 | out_inval_auth: | |
2817 | dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", | |
2818 | data->auth_flavourlen); | |
2819 | return -EINVAL; | |
2820 | ||
2821 | out_no_address: | |
2822 | dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); | |
2823 | return -EINVAL; | |
6da1a034 TM |
2824 | |
2825 | out_invalid_transport_udp: | |
2826 | dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); | |
2827 | return -EINVAL; | |
f0768ebd CL |
2828 | } |
2829 | ||
fac1e8e4 BS |
2830 | /* |
2831 | * NFS v4 module parameters need to stay in the | |
2832 | * NFS client for backwards compatibility | |
2833 | */ | |
2834 | unsigned int nfs_callback_set_tcpport; | |
2835 | unsigned short nfs_callback_tcpport; | |
2836 | /* Default cache timeout is 10 minutes */ | |
2837 | unsigned int nfs_idmap_cache_timeout = 600; | |
2838 | /* Turn off NFSv4 uid/gid mapping when using AUTH_SYS */ | |
2839 | bool nfs4_disable_idmapping = true; | |
2840 | unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE; | |
2841 | unsigned short send_implementation_id = 1; | |
6f2ea7f2 | 2842 | char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN] = ""; |
f6de7a39 | 2843 | bool recover_lost_locks = false; |
fac1e8e4 | 2844 | |
89d77c8f BS |
2845 | EXPORT_SYMBOL_GPL(nfs_callback_set_tcpport); |
2846 | EXPORT_SYMBOL_GPL(nfs_callback_tcpport); | |
2847 | EXPORT_SYMBOL_GPL(nfs_idmap_cache_timeout); | |
2848 | EXPORT_SYMBOL_GPL(nfs4_disable_idmapping); | |
2849 | EXPORT_SYMBOL_GPL(max_session_slots); | |
2850 | EXPORT_SYMBOL_GPL(send_implementation_id); | |
6f2ea7f2 | 2851 | EXPORT_SYMBOL_GPL(nfs4_client_id_uniquifier); |
f6de7a39 | 2852 | EXPORT_SYMBOL_GPL(recover_lost_locks); |
89d77c8f | 2853 | |
fac1e8e4 BS |
2854 | #define NFS_CALLBACK_MAXPORTNR (65535U) |
2855 | ||
2856 | static int param_set_portnr(const char *val, const struct kernel_param *kp) | |
2857 | { | |
2858 | unsigned long num; | |
2859 | int ret; | |
2860 | ||
2861 | if (!val) | |
2862 | return -EINVAL; | |
7297cb68 | 2863 | ret = kstrtoul(val, 0, &num); |
fac1e8e4 BS |
2864 | if (ret == -EINVAL || num > NFS_CALLBACK_MAXPORTNR) |
2865 | return -EINVAL; | |
2866 | *((unsigned int *)kp->arg) = num; | |
2867 | return 0; | |
2868 | } | |
2869 | static struct kernel_param_ops param_ops_portnr = { | |
2870 | .set = param_set_portnr, | |
2871 | .get = param_get_uint, | |
2872 | }; | |
2873 | #define param_check_portnr(name, p) __param_check(name, p, unsigned int); | |
2874 | ||
2875 | module_param_named(callback_tcpport, nfs_callback_set_tcpport, portnr, 0644); | |
2876 | module_param(nfs_idmap_cache_timeout, int, 0644); | |
2877 | module_param(nfs4_disable_idmapping, bool, 0644); | |
6f2ea7f2 CL |
2878 | module_param_string(nfs4_unique_id, nfs4_client_id_uniquifier, |
2879 | NFS4_CLIENT_ID_UNIQ_LEN, 0600); | |
fac1e8e4 BS |
2880 | MODULE_PARM_DESC(nfs4_disable_idmapping, |
2881 | "Turn off NFSv4 idmapping when using 'sec=sys'"); | |
2882 | module_param(max_session_slots, ushort, 0644); | |
2883 | MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 " | |
2884 | "requests the client will negotiate"); | |
2885 | module_param(send_implementation_id, ushort, 0644); | |
2886 | MODULE_PARM_DESC(send_implementation_id, | |
2887 | "Send implementation ID with NFSv4.1 exchange_id"); | |
6f2ea7f2 | 2888 | MODULE_PARM_DESC(nfs4_unique_id, "nfs_client_id4 uniquifier string"); |
425e776d | 2889 | |
f6de7a39 TM |
2890 | module_param(recover_lost_locks, bool, 0644); |
2891 | MODULE_PARM_DESC(recover_lost_locks, | |
2892 | "If the server reports that a lock might be lost, " | |
2893 | "try to recover it risking data corruption."); | |
2894 | ||
2895 | ||
54ceac45 | 2896 | #endif /* CONFIG_NFS_V4 */ |