Commit | Line | Data |
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457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
f7b422b1 DH |
2 | /* |
3 | * linux/fs/nfs/super.c | |
4 | * | |
5 | * Copyright (C) 1992 Rick Sladkey | |
6 | * | |
7 | * nfs superblock handling functions | |
8 | * | |
526719ba | 9 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
f7b422b1 DH |
10 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
11 | * | |
12 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
13 | * J.S.Peatfield@damtp.cam.ac.uk | |
14 | * | |
15 | * Split from inode.c by David Howells <dhowells@redhat.com> | |
16 | * | |
54ceac45 DH |
17 | * - superblocks are indexed on server only - all inodes, dentries, etc. associated with a |
18 | * particular server are held in the same superblock | |
19 | * - NFS superblocks can have several effective roots to the dentry tree | |
20 | * - directory type roots are spliced into the tree when a path from one root reaches the root | |
21 | * of another (see nfs_lookup()) | |
f7b422b1 DH |
22 | */ |
23 | ||
f7b422b1 DH |
24 | #include <linux/module.h> |
25 | #include <linux/init.h> | |
26 | ||
27 | #include <linux/time.h> | |
28 | #include <linux/kernel.h> | |
29 | #include <linux/mm.h> | |
30 | #include <linux/string.h> | |
31 | #include <linux/stat.h> | |
32 | #include <linux/errno.h> | |
33 | #include <linux/unistd.h> | |
34 | #include <linux/sunrpc/clnt.h> | |
5976687a | 35 | #include <linux/sunrpc/addr.h> |
f7b422b1 DH |
36 | #include <linux/sunrpc/stats.h> |
37 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 38 | #include <linux/sunrpc/xprtsock.h> |
2cf7ff7a | 39 | #include <linux/sunrpc/xprtrdma.h> |
f7b422b1 DH |
40 | #include <linux/nfs_fs.h> |
41 | #include <linux/nfs_mount.h> | |
42 | #include <linux/nfs4_mount.h> | |
43 | #include <linux/lockd/bind.h> | |
f7b422b1 DH |
44 | #include <linux/seq_file.h> |
45 | #include <linux/mount.h> | |
c02d7adf | 46 | #include <linux/namei.h> |
f7b422b1 DH |
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 | |
7c0f6ba6 | 59 | #include <linux/uaccess.h> |
f7b422b1 DH |
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 | ||
28cc5cd8 TM |
80 | #define NFS_MAX_CONNECTIONS 16 |
81 | ||
bf0fd768 CL |
82 | enum { |
83 | /* Mount options that take no arguments */ | |
91a575e1 | 84 | Opt_soft, Opt_softerr, Opt_hard, |
bf0fd768 CL |
85 | Opt_posix, Opt_noposix, |
86 | Opt_cto, Opt_nocto, | |
87 | Opt_ac, Opt_noac, | |
88 | Opt_lock, Opt_nolock, | |
2cf7ff7a | 89 | Opt_udp, Opt_tcp, Opt_rdma, |
bf0fd768 CL |
90 | Opt_acl, Opt_noacl, |
91 | Opt_rdirplus, Opt_nordirplus, | |
75180df2 | 92 | Opt_sharecache, Opt_nosharecache, |
d740351b | 93 | Opt_resvport, Opt_noresvport, |
b797cac7 | 94 | Opt_fscache, Opt_nofscache, |
89652617 | 95 | Opt_migration, Opt_nomigration, |
bf0fd768 CL |
96 | |
97 | /* Mount options that take integer arguments */ | |
98 | Opt_port, | |
99 | Opt_rsize, Opt_wsize, Opt_bsize, | |
100 | Opt_timeo, Opt_retrans, | |
101 | Opt_acregmin, Opt_acregmax, | |
102 | Opt_acdirmin, Opt_acdirmax, | |
103 | Opt_actimeo, | |
104 | Opt_namelen, | |
105 | Opt_mountport, | |
e887cbcf | 106 | Opt_mountvers, |
3fd5be9e | 107 | Opt_minorversion, |
bf0fd768 CL |
108 | |
109 | /* Mount options that take string arguments */ | |
0d71b058 | 110 | Opt_nfsvers, |
33832034 | 111 | Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost, |
0ac83779 | 112 | Opt_addr, Opt_mountaddr, Opt_clientaddr, |
28cc5cd8 | 113 | Opt_nconnect, |
7973c1f1 | 114 | Opt_lookupcache, |
b797cac7 | 115 | Opt_fscache_uniq, |
5eebde23 | 116 | Opt_local_lock, |
bf0fd768 | 117 | |
f45663ce CL |
118 | /* Special mount options */ |
119 | Opt_userspace, Opt_deprecated, Opt_sloppy, | |
bf0fd768 CL |
120 | |
121 | Opt_err | |
122 | }; | |
123 | ||
a447c093 | 124 | static const match_table_t nfs_mount_option_tokens = { |
bf0fd768 CL |
125 | { Opt_userspace, "bg" }, |
126 | { Opt_userspace, "fg" }, | |
ecbb3845 CL |
127 | { Opt_userspace, "retry=%s" }, |
128 | ||
f45663ce CL |
129 | { Opt_sloppy, "sloppy" }, |
130 | ||
bf0fd768 | 131 | { Opt_soft, "soft" }, |
91a575e1 | 132 | { Opt_softerr, "softerr" }, |
bf0fd768 | 133 | { Opt_hard, "hard" }, |
d33e4dfe CL |
134 | { Opt_deprecated, "intr" }, |
135 | { Opt_deprecated, "nointr" }, | |
bf0fd768 CL |
136 | { Opt_posix, "posix" }, |
137 | { Opt_noposix, "noposix" }, | |
138 | { Opt_cto, "cto" }, | |
139 | { Opt_nocto, "nocto" }, | |
140 | { Opt_ac, "ac" }, | |
141 | { Opt_noac, "noac" }, | |
142 | { Opt_lock, "lock" }, | |
143 | { Opt_nolock, "nolock" }, | |
bf0fd768 CL |
144 | { Opt_udp, "udp" }, |
145 | { Opt_tcp, "tcp" }, | |
2cf7ff7a | 146 | { Opt_rdma, "rdma" }, |
bf0fd768 CL |
147 | { Opt_acl, "acl" }, |
148 | { Opt_noacl, "noacl" }, | |
149 | { Opt_rdirplus, "rdirplus" }, | |
150 | { Opt_nordirplus, "nordirplus" }, | |
75180df2 TM |
151 | { Opt_sharecache, "sharecache" }, |
152 | { Opt_nosharecache, "nosharecache" }, | |
d740351b CL |
153 | { Opt_resvport, "resvport" }, |
154 | { Opt_noresvport, "noresvport" }, | |
b797cac7 | 155 | { Opt_fscache, "fsc" }, |
b797cac7 | 156 | { Opt_nofscache, "nofsc" }, |
89652617 CL |
157 | { Opt_migration, "migration" }, |
158 | { Opt_nomigration, "nomigration" }, | |
bf0fd768 | 159 | |
a5a16bae CL |
160 | { Opt_port, "port=%s" }, |
161 | { Opt_rsize, "rsize=%s" }, | |
162 | { Opt_wsize, "wsize=%s" }, | |
163 | { Opt_bsize, "bsize=%s" }, | |
164 | { Opt_timeo, "timeo=%s" }, | |
165 | { Opt_retrans, "retrans=%s" }, | |
166 | { Opt_acregmin, "acregmin=%s" }, | |
167 | { Opt_acregmax, "acregmax=%s" }, | |
168 | { Opt_acdirmin, "acdirmin=%s" }, | |
169 | { Opt_acdirmax, "acdirmax=%s" }, | |
170 | { Opt_actimeo, "actimeo=%s" }, | |
171 | { Opt_namelen, "namlen=%s" }, | |
172 | { Opt_mountport, "mountport=%s" }, | |
173 | { Opt_mountvers, "mountvers=%s" }, | |
0d71b058 TM |
174 | { Opt_minorversion, "minorversion=%s" }, |
175 | ||
a5a16bae CL |
176 | { Opt_nfsvers, "nfsvers=%s" }, |
177 | { Opt_nfsvers, "vers=%s" }, | |
bf0fd768 CL |
178 | |
179 | { Opt_sec, "sec=%s" }, | |
180 | { Opt_proto, "proto=%s" }, | |
181 | { Opt_mountproto, "mountproto=%s" }, | |
182 | { Opt_addr, "addr=%s" }, | |
183 | { Opt_clientaddr, "clientaddr=%s" }, | |
33832034 | 184 | { Opt_mounthost, "mounthost=%s" }, |
0ac83779 | 185 | { Opt_mountaddr, "mountaddr=%s" }, |
bf0fd768 | 186 | |
28cc5cd8 TM |
187 | { Opt_nconnect, "nconnect=%s" }, |
188 | ||
7973c1f1 | 189 | { Opt_lookupcache, "lookupcache=%s" }, |
a6d5ff64 | 190 | { Opt_fscache_uniq, "fsc=%s" }, |
5eebde23 | 191 | { Opt_local_lock, "local_lock=%s" }, |
7973c1f1 | 192 | |
3862279a TM |
193 | /* The following needs to be listed after all other options */ |
194 | { Opt_nfsvers, "v%s" }, | |
195 | ||
bf0fd768 CL |
196 | { Opt_err, NULL } |
197 | }; | |
198 | ||
199 | enum { | |
ee671b01 | 200 | Opt_xprt_udp, Opt_xprt_udp6, Opt_xprt_tcp, Opt_xprt_tcp6, Opt_xprt_rdma, |
181342c5 | 201 | Opt_xprt_rdma6, |
bf0fd768 CL |
202 | |
203 | Opt_xprt_err | |
204 | }; | |
205 | ||
a447c093 | 206 | static const match_table_t nfs_xprt_protocol_tokens = { |
bf0fd768 | 207 | { Opt_xprt_udp, "udp" }, |
ee671b01 | 208 | { Opt_xprt_udp6, "udp6" }, |
bf0fd768 | 209 | { Opt_xprt_tcp, "tcp" }, |
ee671b01 | 210 | { Opt_xprt_tcp6, "tcp6" }, |
2cf7ff7a | 211 | { Opt_xprt_rdma, "rdma" }, |
181342c5 | 212 | { Opt_xprt_rdma6, "rdma6" }, |
bf0fd768 CL |
213 | |
214 | { Opt_xprt_err, NULL } | |
215 | }; | |
216 | ||
217 | enum { | |
218 | Opt_sec_none, Opt_sec_sys, | |
219 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, | |
220 | Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, | |
221 | Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, | |
222 | ||
223 | Opt_sec_err | |
224 | }; | |
225 | ||
a447c093 | 226 | static const match_table_t nfs_secflavor_tokens = { |
bf0fd768 CL |
227 | { Opt_sec_none, "none" }, |
228 | { Opt_sec_none, "null" }, | |
229 | { Opt_sec_sys, "sys" }, | |
230 | ||
231 | { Opt_sec_krb5, "krb5" }, | |
232 | { Opt_sec_krb5i, "krb5i" }, | |
233 | { Opt_sec_krb5p, "krb5p" }, | |
234 | ||
235 | { Opt_sec_lkey, "lkey" }, | |
236 | { Opt_sec_lkeyi, "lkeyi" }, | |
237 | { Opt_sec_lkeyp, "lkeyp" }, | |
238 | ||
8d042218 OK |
239 | { Opt_sec_spkm, "spkm3" }, |
240 | { Opt_sec_spkmi, "spkm3i" }, | |
241 | { Opt_sec_spkmp, "spkm3p" }, | |
242 | ||
bf0fd768 CL |
243 | { Opt_sec_err, NULL } |
244 | }; | |
245 | ||
7973c1f1 TM |
246 | enum { |
247 | Opt_lookupcache_all, Opt_lookupcache_positive, | |
248 | Opt_lookupcache_none, | |
249 | ||
250 | Opt_lookupcache_err | |
251 | }; | |
252 | ||
253 | static match_table_t nfs_lookupcache_tokens = { | |
254 | { Opt_lookupcache_all, "all" }, | |
255 | { Opt_lookupcache_positive, "pos" }, | |
256 | { Opt_lookupcache_positive, "positive" }, | |
257 | { Opt_lookupcache_none, "none" }, | |
258 | ||
259 | { Opt_lookupcache_err, NULL } | |
260 | }; | |
261 | ||
5eebde23 SJ |
262 | enum { |
263 | Opt_local_lock_all, Opt_local_lock_flock, Opt_local_lock_posix, | |
264 | Opt_local_lock_none, | |
265 | ||
266 | Opt_local_lock_err | |
267 | }; | |
268 | ||
269 | static match_table_t nfs_local_lock_tokens = { | |
270 | { Opt_local_lock_all, "all" }, | |
271 | { Opt_local_lock_flock, "flock" }, | |
272 | { Opt_local_lock_posix, "posix" }, | |
273 | { Opt_local_lock_none, "none" }, | |
274 | ||
275 | { Opt_local_lock_err, NULL } | |
276 | }; | |
277 | ||
0d71b058 TM |
278 | enum { |
279 | Opt_vers_2, Opt_vers_3, Opt_vers_4, Opt_vers_4_0, | |
42c2c424 | 280 | Opt_vers_4_1, Opt_vers_4_2, |
0d71b058 TM |
281 | |
282 | Opt_vers_err | |
283 | }; | |
284 | ||
285 | static match_table_t nfs_vers_tokens = { | |
286 | { Opt_vers_2, "2" }, | |
287 | { Opt_vers_3, "3" }, | |
288 | { Opt_vers_4, "4" }, | |
289 | { Opt_vers_4_0, "4.0" }, | |
290 | { Opt_vers_4_1, "4.1" }, | |
42c2c424 | 291 | { Opt_vers_4_2, "4.2" }, |
0d71b058 TM |
292 | |
293 | { Opt_vers_err, NULL } | |
294 | }; | |
bf0fd768 | 295 | |
31f43471 AV |
296 | static struct dentry *nfs_xdev_mount(struct file_system_type *fs_type, |
297 | int flags, const char *dev_name, void *raw_data); | |
f7b422b1 | 298 | |
ab7017a3 | 299 | struct file_system_type nfs_fs_type = { |
f7b422b1 DH |
300 | .owner = THIS_MODULE, |
301 | .name = "nfs", | |
01194981 | 302 | .mount = nfs_fs_mount, |
f7b422b1 | 303 | .kill_sb = nfs_kill_super, |
ecf3d1f1 | 304 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, |
f7b422b1 | 305 | }; |
7f78e035 | 306 | MODULE_ALIAS_FS("nfs"); |
ddda8e0a | 307 | EXPORT_SYMBOL_GPL(nfs_fs_type); |
f7b422b1 | 308 | |
54ceac45 | 309 | struct file_system_type nfs_xdev_fs_type = { |
f7b422b1 DH |
310 | .owner = THIS_MODULE, |
311 | .name = "nfs", | |
31f43471 | 312 | .mount = nfs_xdev_mount, |
f7b422b1 | 313 | .kill_sb = nfs_kill_super, |
ecf3d1f1 | 314 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, |
f7b422b1 DH |
315 | }; |
316 | ||
6a74490d | 317 | const struct super_operations nfs_sops = { |
f7b422b1 | 318 | .alloc_inode = nfs_alloc_inode, |
ca1a199e | 319 | .free_inode = nfs_free_inode, |
f7b422b1 | 320 | .write_inode = nfs_write_inode, |
eed99357 | 321 | .drop_inode = nfs_drop_inode, |
f7b422b1 | 322 | .statfs = nfs_statfs, |
b57922d9 | 323 | .evict_inode = nfs_evict_inode, |
f7b422b1 DH |
324 | .umount_begin = nfs_umount_begin, |
325 | .show_options = nfs_show_options, | |
c7f404b4 AV |
326 | .show_devname = nfs_show_devname, |
327 | .show_path = nfs_show_path, | |
f7b422b1 | 328 | .show_stats = nfs_show_stats, |
48b605f8 | 329 | .remount_fs = nfs_remount, |
f7b422b1 | 330 | }; |
ddda8e0a | 331 | EXPORT_SYMBOL_GPL(nfs_sops); |
f7b422b1 | 332 | |
89d77c8f | 333 | #if IS_ENABLED(CONFIG_NFS_V4) |
b72e4f42 | 334 | static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *); |
d72c727c BS |
335 | static int nfs4_validate_mount_data(void *options, |
336 | struct nfs_parsed_mount_data *args, const char *dev_name); | |
1ae811ee | 337 | |
338 | struct file_system_type nfs4_fs_type = { | |
339 | .owner = THIS_MODULE, | |
340 | .name = "nfs4", | |
341 | .mount = nfs_fs_mount, | |
342 | .kill_sb = nfs_kill_super, | |
ecf3d1f1 | 343 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, |
1ae811ee | 344 | }; |
7f78e035 | 345 | MODULE_ALIAS_FS("nfs4"); |
fa7614dd | 346 | MODULE_ALIAS("nfs4"); |
1ae811ee | 347 | EXPORT_SYMBOL_GPL(nfs4_fs_type); |
348 | ||
349 | static int __init register_nfs4_fs(void) | |
350 | { | |
351 | return register_filesystem(&nfs4_fs_type); | |
352 | } | |
353 | ||
354 | static void unregister_nfs4_fs(void) | |
355 | { | |
356 | unregister_filesystem(&nfs4_fs_type); | |
357 | } | |
358 | #else | |
359 | static int __init register_nfs4_fs(void) | |
360 | { | |
361 | return 0; | |
362 | } | |
363 | ||
364 | static void unregister_nfs4_fs(void) | |
365 | { | |
366 | } | |
f7b422b1 DH |
367 | #endif |
368 | ||
8e1f936b | 369 | static struct shrinker acl_shrinker = { |
1ab6c499 DC |
370 | .count_objects = nfs_access_cache_count, |
371 | .scan_objects = nfs_access_cache_scan, | |
8e1f936b RR |
372 | .seeks = DEFAULT_SEEKS, |
373 | }; | |
979df72e | 374 | |
f7b422b1 DH |
375 | /* |
376 | * Register the NFS filesystems | |
377 | */ | |
378 | int __init register_nfs_fs(void) | |
379 | { | |
380 | int ret; | |
381 | ||
382 | ret = register_filesystem(&nfs_fs_type); | |
383 | if (ret < 0) | |
384 | goto error_0; | |
385 | ||
1ae811ee | 386 | ret = register_nfs4_fs(); |
f7b422b1 DH |
387 | if (ret < 0) |
388 | goto error_1; | |
1ae811ee | 389 | |
390 | ret = nfs_register_sysctl(); | |
391 | if (ret < 0) | |
392 | goto error_2; | |
5ef8d792 KM |
393 | ret = register_shrinker(&acl_shrinker); |
394 | if (ret < 0) | |
395 | goto error_3; | |
f7b422b1 | 396 | return 0; |
5ef8d792 KM |
397 | error_3: |
398 | nfs_unregister_sysctl(); | |
1ae811ee | 399 | error_2: |
400 | unregister_nfs4_fs(); | |
f7b422b1 DH |
401 | error_1: |
402 | unregister_filesystem(&nfs_fs_type); | |
f7b422b1 DH |
403 | error_0: |
404 | return ret; | |
405 | } | |
406 | ||
407 | /* | |
408 | * Unregister the NFS filesystems | |
409 | */ | |
410 | void __exit unregister_nfs_fs(void) | |
411 | { | |
8e1f936b | 412 | unregister_shrinker(&acl_shrinker); |
49af7ee1 | 413 | nfs_unregister_sysctl(); |
1ae811ee | 414 | unregister_nfs4_fs(); |
f7b422b1 DH |
415 | unregister_filesystem(&nfs_fs_type); |
416 | } | |
417 | ||
ea7c38fe | 418 | bool nfs_sb_active(struct super_block *sb) |
ef818a28 | 419 | { |
1daef0a8 | 420 | struct nfs_server *server = NFS_SB(sb); |
ef818a28 | 421 | |
ea7c38fe TM |
422 | if (!atomic_inc_not_zero(&sb->s_active)) |
423 | return false; | |
424 | if (atomic_inc_return(&server->active) != 1) | |
425 | atomic_dec(&sb->s_active); | |
426 | return true; | |
ef818a28 | 427 | } |
89d77c8f | 428 | EXPORT_SYMBOL_GPL(nfs_sb_active); |
ef818a28 | 429 | |
1daef0a8 | 430 | void nfs_sb_deactive(struct super_block *sb) |
ef818a28 SD |
431 | { |
432 | struct nfs_server *server = NFS_SB(sb); | |
1daef0a8 TM |
433 | |
434 | if (atomic_dec_and_test(&server->active)) | |
435 | deactivate_super(sb); | |
ef818a28 | 436 | } |
89d77c8f | 437 | EXPORT_SYMBOL_GPL(nfs_sb_deactive); |
ef818a28 | 438 | |
f7b422b1 DH |
439 | /* |
440 | * Deliver file system statistics to userspace | |
441 | */ | |
fbdefd64 | 442 | int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
f7b422b1 | 443 | { |
0c7d90cf | 444 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
f7b422b1 DH |
445 | unsigned char blockbits; |
446 | unsigned long blockres; | |
2b0143b5 | 447 | struct nfs_fh *fh = NFS_FH(d_inode(dentry)); |
ca7e9a0d TM |
448 | struct nfs_fsstat res; |
449 | int error = -ENOMEM; | |
450 | ||
451 | res.fattr = nfs_alloc_fattr(); | |
452 | if (res.fattr == NULL) | |
453 | goto out_err; | |
f7b422b1 | 454 | |
8fa5c000 | 455 | error = server->nfs_client->rpc_ops->statfs(server, fh, &res); |
fbf3fdd2 MZ |
456 | if (unlikely(error == -ESTALE)) { |
457 | struct dentry *pd_dentry; | |
458 | ||
459 | pd_dentry = dget_parent(dentry); | |
1cfb7072 AV |
460 | nfs_zap_caches(d_inode(pd_dentry)); |
461 | dput(pd_dentry); | |
fbf3fdd2 | 462 | } |
ca7e9a0d | 463 | nfs_free_fattr(res.fattr); |
f7b422b1 DH |
464 | if (error < 0) |
465 | goto out_err; | |
ca7e9a0d | 466 | |
1a0ba9ae | 467 | buf->f_type = NFS_SUPER_MAGIC; |
f7b422b1 DH |
468 | |
469 | /* | |
470 | * Current versions of glibc do not correctly handle the | |
471 | * case where f_frsize != f_bsize. Eventually we want to | |
472 | * report the value of wtmult in this field. | |
473 | */ | |
0c7d90cf | 474 | buf->f_frsize = dentry->d_sb->s_blocksize; |
f7b422b1 DH |
475 | |
476 | /* | |
477 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
478 | * are reported in units of f_frsize. Linux hasn't had | |
479 | * an f_frsize field in its statfs struct until recently, | |
480 | * thus historically Linux's sys_statfs reports these | |
481 | * fields in units of f_bsize. | |
482 | */ | |
0c7d90cf DH |
483 | buf->f_bsize = dentry->d_sb->s_blocksize; |
484 | blockbits = dentry->d_sb->s_blocksize_bits; | |
f7b422b1 DH |
485 | blockres = (1 << blockbits) - 1; |
486 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
487 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
488 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
489 | ||
490 | buf->f_files = res.tfiles; | |
491 | buf->f_ffree = res.afiles; | |
492 | ||
493 | buf->f_namelen = server->namelen; | |
1a0ba9ae | 494 | |
f7b422b1 DH |
495 | return 0; |
496 | ||
497 | out_err: | |
3110ff80 | 498 | dprintk("%s: statfs error = %d\n", __func__, -error); |
1a0ba9ae | 499 | return error; |
f7b422b1 | 500 | } |
89d77c8f | 501 | EXPORT_SYMBOL_GPL(nfs_statfs); |
f7b422b1 | 502 | |
7d4e2747 DH |
503 | /* |
504 | * Map the security flavour number to a name | |
505 | */ | |
81039f1f TM |
506 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
507 | { | |
7d4e2747 | 508 | static const struct { |
81039f1f TM |
509 | rpc_authflavor_t flavour; |
510 | const char *str; | |
4d4b69dd WAA |
511 | } sec_flavours[NFS_AUTH_INFO_MAX_FLAVORS] = { |
512 | /* update NFS_AUTH_INFO_MAX_FLAVORS when this list changes! */ | |
81039f1f TM |
513 | { RPC_AUTH_NULL, "null" }, |
514 | { RPC_AUTH_UNIX, "sys" }, | |
515 | { RPC_AUTH_GSS_KRB5, "krb5" }, | |
516 | { RPC_AUTH_GSS_KRB5I, "krb5i" }, | |
517 | { RPC_AUTH_GSS_KRB5P, "krb5p" }, | |
518 | { RPC_AUTH_GSS_LKEY, "lkey" }, | |
519 | { RPC_AUTH_GSS_LKEYI, "lkeyi" }, | |
520 | { RPC_AUTH_GSS_LKEYP, "lkeyp" }, | |
521 | { RPC_AUTH_GSS_SPKM, "spkm" }, | |
522 | { RPC_AUTH_GSS_SPKMI, "spkmi" }, | |
523 | { RPC_AUTH_GSS_SPKMP, "spkmp" }, | |
4d81cd16 | 524 | { UINT_MAX, "unknown" } |
81039f1f TM |
525 | }; |
526 | int i; | |
527 | ||
4d81cd16 | 528 | for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) { |
81039f1f TM |
529 | if (sec_flavours[i].flavour == flavour) |
530 | break; | |
531 | } | |
532 | return sec_flavours[i].str; | |
533 | } | |
534 | ||
ee671b01 JL |
535 | static void nfs_show_mountd_netid(struct seq_file *m, struct nfs_server *nfss, |
536 | int showdefaults) | |
537 | { | |
538 | struct sockaddr *sap = (struct sockaddr *) &nfss->mountd_address; | |
6f6e3c09 | 539 | char *proto = NULL; |
ee671b01 | 540 | |
ee671b01 JL |
541 | switch (sap->sa_family) { |
542 | case AF_INET: | |
543 | switch (nfss->mountd_protocol) { | |
544 | case IPPROTO_UDP: | |
6f6e3c09 | 545 | proto = RPCBIND_NETID_UDP; |
ee671b01 JL |
546 | break; |
547 | case IPPROTO_TCP: | |
6f6e3c09 | 548 | proto = RPCBIND_NETID_TCP; |
ee671b01 | 549 | break; |
ee671b01 JL |
550 | } |
551 | break; | |
552 | case AF_INET6: | |
553 | switch (nfss->mountd_protocol) { | |
554 | case IPPROTO_UDP: | |
6f6e3c09 | 555 | proto = RPCBIND_NETID_UDP6; |
ee671b01 JL |
556 | break; |
557 | case IPPROTO_TCP: | |
6f6e3c09 | 558 | proto = RPCBIND_NETID_TCP6; |
ee671b01 | 559 | break; |
ee671b01 JL |
560 | } |
561 | break; | |
ee671b01 | 562 | } |
6f6e3c09 N |
563 | if (proto || showdefaults) |
564 | seq_printf(m, ",mountproto=%s", proto ?: "auto"); | |
ee671b01 JL |
565 | } |
566 | ||
82d101d5 CL |
567 | static void nfs_show_mountd_options(struct seq_file *m, struct nfs_server *nfss, |
568 | int showdefaults) | |
569 | { | |
570 | struct sockaddr *sap = (struct sockaddr *)&nfss->mountd_address; | |
571 | ||
d5eff1a3 BS |
572 | if (nfss->flags & NFS_MOUNT_LEGACY_INTERFACE) |
573 | return; | |
574 | ||
82d101d5 CL |
575 | switch (sap->sa_family) { |
576 | case AF_INET: { | |
577 | struct sockaddr_in *sin = (struct sockaddr_in *)sap; | |
be859405 | 578 | seq_printf(m, ",mountaddr=%pI4", &sin->sin_addr.s_addr); |
82d101d5 CL |
579 | break; |
580 | } | |
581 | case AF_INET6: { | |
582 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
d250e190 | 583 | seq_printf(m, ",mountaddr=%pI6c", &sin6->sin6_addr); |
82d101d5 CL |
584 | break; |
585 | } | |
586 | default: | |
587 | if (showdefaults) | |
1c316e39 | 588 | seq_puts(m, ",mountaddr=unspecified"); |
82d101d5 CL |
589 | } |
590 | ||
591 | if (nfss->mountd_version || showdefaults) | |
592 | seq_printf(m, ",mountvers=%u", nfss->mountd_version); | |
aa699473 SK |
593 | if ((nfss->mountd_port && |
594 | nfss->mountd_port != (unsigned short)NFS_UNSPEC_PORT) || | |
595 | showdefaults) | |
82d101d5 CL |
596 | seq_printf(m, ",mountport=%u", nfss->mountd_port); |
597 | ||
ee671b01 | 598 | nfs_show_mountd_netid(m, nfss, showdefaults); |
82d101d5 CL |
599 | } |
600 | ||
89d77c8f | 601 | #if IS_ENABLED(CONFIG_NFS_V4) |
0be8189f TM |
602 | static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss, |
603 | int showdefaults) | |
604 | { | |
605 | struct nfs_client *clp = nfss->nfs_client; | |
606 | ||
607 | seq_printf(m, ",clientaddr=%s", clp->cl_ipaddr); | |
0be8189f TM |
608 | } |
609 | #else | |
610 | static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss, | |
611 | int showdefaults) | |
612 | { | |
613 | } | |
614 | #endif | |
615 | ||
7bbceb6f TM |
616 | static void nfs_show_nfs_version(struct seq_file *m, |
617 | unsigned int version, | |
618 | unsigned int minorversion) | |
619 | { | |
620 | seq_printf(m, ",vers=%u", version); | |
621 | if (version == 4) | |
622 | seq_printf(m, ".%u", minorversion); | |
623 | } | |
624 | ||
f7b422b1 DH |
625 | /* |
626 | * Describe the mount options in force on this server representation | |
627 | */ | |
82d101d5 CL |
628 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, |
629 | int showdefaults) | |
f7b422b1 | 630 | { |
509de811 | 631 | static const struct proc_nfs_info { |
f7b422b1 | 632 | int flag; |
509de811 DH |
633 | const char *str; |
634 | const char *nostr; | |
f7b422b1 | 635 | } nfs_info[] = { |
91a575e1 TM |
636 | { NFS_MOUNT_SOFT, ",soft", "" }, |
637 | { NFS_MOUNT_SOFTERR, ",softerr", "" }, | |
82d101d5 | 638 | { NFS_MOUNT_POSIX, ",posix", "" }, |
f7b422b1 DH |
639 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
640 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
641 | { NFS_MOUNT_NONLM, ",nolock", "" }, | |
642 | { NFS_MOUNT_NOACL, ",noacl", "" }, | |
74dd34e6 | 643 | { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" }, |
d740351b CL |
644 | { NFS_MOUNT_UNSHARED, ",nosharecache", "" }, |
645 | { NFS_MOUNT_NORESVPORT, ",noresvport", "" }, | |
f7b422b1 DH |
646 | { 0, NULL, NULL } |
647 | }; | |
509de811 | 648 | const struct proc_nfs_info *nfs_infop; |
8fa5c000 | 649 | struct nfs_client *clp = nfss->nfs_client; |
82d101d5 | 650 | u32 version = clp->rpc_ops->version; |
7c563cc9 | 651 | int local_flock, local_fcntl; |
f7b422b1 | 652 | |
7bbceb6f | 653 | nfs_show_nfs_version(m, version, clp->cl_minorversion); |
2d767432 CL |
654 | seq_printf(m, ",rsize=%u", nfss->rsize); |
655 | seq_printf(m, ",wsize=%u", nfss->wsize); | |
82d101d5 CL |
656 | if (nfss->bsize != 0) |
657 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
658 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
0e0cab74 | 659 | if (nfss->acregmin != NFS_DEF_ACREGMIN*HZ || showdefaults) |
2d767432 | 660 | seq_printf(m, ",acregmin=%u", nfss->acregmin/HZ); |
0e0cab74 | 661 | if (nfss->acregmax != NFS_DEF_ACREGMAX*HZ || showdefaults) |
2d767432 | 662 | seq_printf(m, ",acregmax=%u", nfss->acregmax/HZ); |
0e0cab74 | 663 | if (nfss->acdirmin != NFS_DEF_ACDIRMIN*HZ || showdefaults) |
2d767432 | 664 | seq_printf(m, ",acdirmin=%u", nfss->acdirmin/HZ); |
0e0cab74 | 665 | if (nfss->acdirmax != NFS_DEF_ACDIRMAX*HZ || showdefaults) |
2d767432 | 666 | seq_printf(m, ",acdirmax=%u", nfss->acdirmax/HZ); |
91a575e1 TM |
667 | if (!(nfss->flags & (NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR))) |
668 | seq_puts(m, ",hard"); | |
f7b422b1 DH |
669 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { |
670 | if (nfss->flags & nfs_infop->flag) | |
671 | seq_puts(m, nfs_infop->str); | |
672 | else | |
673 | seq_puts(m, nfs_infop->nostr); | |
674 | } | |
2446ab60 | 675 | rcu_read_lock(); |
56928edd | 676 | seq_printf(m, ",proto=%s", |
ee671b01 | 677 | rpc_peeraddr2str(nfss->client, RPC_DISPLAY_NETID)); |
2446ab60 | 678 | rcu_read_unlock(); |
fd87c8b7 TM |
679 | if (clp->cl_nconnect > 0) |
680 | seq_printf(m, ",nconnect=%u", clp->cl_nconnect); | |
82d101d5 CL |
681 | if (version == 4) { |
682 | if (nfss->port != NFS_PORT) | |
683 | seq_printf(m, ",port=%u", nfss->port); | |
684 | } else | |
685 | if (nfss->port) | |
686 | seq_printf(m, ",port=%u", nfss->port); | |
687 | ||
33170233 TM |
688 | seq_printf(m, ",timeo=%lu", 10U * nfss->client->cl_timeout->to_initval / HZ); |
689 | seq_printf(m, ",retrans=%u", nfss->client->cl_timeout->to_retries); | |
81039f1f | 690 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
82d101d5 CL |
691 | |
692 | if (version != 4) | |
693 | nfs_show_mountd_options(m, nfss, showdefaults); | |
0be8189f TM |
694 | else |
695 | nfs_show_nfsv4_options(m, nfss, showdefaults); | |
82d101d5 | 696 | |
b797cac7 | 697 | if (nfss->options & NFS_OPTION_FSCACHE) |
1c316e39 | 698 | seq_puts(m, ",fsc"); |
9b00c643 | 699 | |
89652617 | 700 | if (nfss->options & NFS_OPTION_MIGRATION) |
1c316e39 | 701 | seq_puts(m, ",migration"); |
89652617 | 702 | |
9b00c643 PL |
703 | if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONEG) { |
704 | if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONE) | |
1c316e39 | 705 | seq_puts(m, ",lookupcache=none"); |
9b00c643 | 706 | else |
1c316e39 | 707 | seq_puts(m, ",lookupcache=pos"); |
9b00c643 | 708 | } |
7c563cc9 SJ |
709 | |
710 | local_flock = nfss->flags & NFS_MOUNT_LOCAL_FLOCK; | |
711 | local_fcntl = nfss->flags & NFS_MOUNT_LOCAL_FCNTL; | |
712 | ||
713 | if (!local_flock && !local_fcntl) | |
1c316e39 | 714 | seq_puts(m, ",local_lock=none"); |
7c563cc9 | 715 | else if (local_flock && local_fcntl) |
1c316e39 | 716 | seq_puts(m, ",local_lock=all"); |
7c563cc9 | 717 | else if (local_flock) |
1c316e39 | 718 | seq_puts(m, ",local_lock=flock"); |
7c563cc9 | 719 | else |
1c316e39 | 720 | seq_puts(m, ",local_lock=posix"); |
f7b422b1 DH |
721 | } |
722 | ||
723 | /* | |
724 | * Describe the mount options on this VFS mountpoint | |
725 | */ | |
fbdefd64 | 726 | int nfs_show_options(struct seq_file *m, struct dentry *root) |
f7b422b1 | 727 | { |
34c80b1d | 728 | struct nfs_server *nfss = NFS_SB(root->d_sb); |
f7b422b1 DH |
729 | |
730 | nfs_show_mount_options(m, nfss, 0); | |
731 | ||
2446ab60 | 732 | rcu_read_lock(); |
5d8515ca CL |
733 | seq_printf(m, ",addr=%s", |
734 | rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient, | |
735 | RPC_DISPLAY_ADDR)); | |
2446ab60 | 736 | rcu_read_unlock(); |
f7b422b1 DH |
737 | |
738 | return 0; | |
739 | } | |
89d77c8f | 740 | EXPORT_SYMBOL_GPL(nfs_show_options); |
45402c38 | 741 | |
89d77c8f | 742 | #if IS_ENABLED(CONFIG_NFS_V4) |
1a7441b2 DW |
743 | static void show_lease(struct seq_file *m, struct nfs_server *server) |
744 | { | |
745 | struct nfs_client *clp = server->nfs_client; | |
746 | unsigned long expire; | |
747 | ||
748 | seq_printf(m, ",lease_time=%ld", clp->cl_lease_time / HZ); | |
749 | expire = clp->cl_last_renewal + clp->cl_lease_time; | |
750 | seq_printf(m, ",lease_expired=%ld", | |
751 | time_after(expire, jiffies) ? 0 : (jiffies - expire) / HZ); | |
752 | } | |
ae50c0b5 | 753 | #ifdef CONFIG_NFS_V4_1 |
45402c38 | 754 | static void show_sessions(struct seq_file *m, struct nfs_server *server) |
ae50c0b5 BF |
755 | { |
756 | if (nfs4_has_session(server->nfs_client)) | |
1c316e39 | 757 | seq_puts(m, ",sessions"); |
ae50c0b5 BF |
758 | } |
759 | #else | |
45402c38 HS |
760 | static void show_sessions(struct seq_file *m, struct nfs_server *server) {} |
761 | #endif | |
ae50c0b5 BF |
762 | #endif |
763 | ||
764 | #ifdef CONFIG_NFS_V4_1 | |
45402c38 | 765 | static void show_pnfs(struct seq_file *m, struct nfs_server *server) |
ae50c0b5 BF |
766 | { |
767 | seq_printf(m, ",pnfs="); | |
768 | if (server->pnfs_curr_ld) | |
769 | seq_printf(m, "%s", server->pnfs_curr_ld->name); | |
770 | else | |
771 | seq_printf(m, "not configured"); | |
772 | } | |
7e03b7cc TM |
773 | |
774 | static void show_implementation_id(struct seq_file *m, struct nfs_server *nfss) | |
775 | { | |
59155546 CL |
776 | if (nfss->nfs_client && nfss->nfs_client->cl_implid) { |
777 | struct nfs41_impl_id *impl_id = nfss->nfs_client->cl_implid; | |
7e03b7cc TM |
778 | seq_printf(m, "\n\timpl_id:\tname='%s',domain='%s'," |
779 | "date='%llu,%u'", | |
780 | impl_id->name, impl_id->domain, | |
781 | impl_id->date.seconds, impl_id->date.nseconds); | |
782 | } | |
783 | } | |
45402c38 | 784 | #else |
89d77c8f | 785 | #if IS_ENABLED(CONFIG_NFS_V4) |
7e03b7cc TM |
786 | static void show_pnfs(struct seq_file *m, struct nfs_server *server) |
787 | { | |
788 | } | |
45402c38 | 789 | #endif |
7e03b7cc TM |
790 | static void show_implementation_id(struct seq_file *m, struct nfs_server *nfss) |
791 | { | |
792 | } | |
45402c38 | 793 | #endif |
f7b422b1 | 794 | |
fbdefd64 | 795 | int nfs_show_devname(struct seq_file *m, struct dentry *root) |
c7f404b4 AV |
796 | { |
797 | char *page = (char *) __get_free_page(GFP_KERNEL); | |
798 | char *devname, *dummy; | |
799 | int err = 0; | |
800 | if (!page) | |
801 | return -ENOMEM; | |
97a54868 | 802 | devname = nfs_path(&dummy, root, page, PAGE_SIZE, 0); |
c7f404b4 AV |
803 | if (IS_ERR(devname)) |
804 | err = PTR_ERR(devname); | |
805 | else | |
806 | seq_escape(m, devname, " \t\n\\"); | |
807 | free_page((unsigned long)page); | |
808 | return err; | |
809 | } | |
89d77c8f | 810 | EXPORT_SYMBOL_GPL(nfs_show_devname); |
c7f404b4 | 811 | |
fbdefd64 | 812 | int nfs_show_path(struct seq_file *m, struct dentry *dentry) |
c7f404b4 AV |
813 | { |
814 | seq_puts(m, "/"); | |
815 | return 0; | |
816 | } | |
89d77c8f | 817 | EXPORT_SYMBOL_GPL(nfs_show_path); |
c7f404b4 | 818 | |
f7b422b1 DH |
819 | /* |
820 | * Present statistical information for this VFS mountpoint | |
821 | */ | |
fbdefd64 | 822 | int nfs_show_stats(struct seq_file *m, struct dentry *root) |
f7b422b1 DH |
823 | { |
824 | int i, cpu; | |
64132379 | 825 | struct nfs_server *nfss = NFS_SB(root->d_sb); |
f7b422b1 DH |
826 | struct rpc_auth *auth = nfss->client->cl_auth; |
827 | struct nfs_iostats totals = { }; | |
828 | ||
829 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
830 | ||
831 | /* | |
832 | * Display all mount option settings | |
833 | */ | |
1c316e39 | 834 | seq_puts(m, "\n\topts:\t"); |
bc98a42c | 835 | seq_puts(m, sb_rdonly(root->d_sb) ? "ro" : "rw"); |
1751e8a6 LT |
836 | seq_puts(m, root->d_sb->s_flags & SB_SYNCHRONOUS ? ",sync" : ""); |
837 | seq_puts(m, root->d_sb->s_flags & SB_NOATIME ? ",noatime" : ""); | |
838 | seq_puts(m, root->d_sb->s_flags & SB_NODIRATIME ? ",nodiratime" : ""); | |
f7b422b1 DH |
839 | nfs_show_mount_options(m, nfss, 1); |
840 | ||
841 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); | |
842 | ||
7e03b7cc | 843 | show_implementation_id(m, nfss); |
7d2ed9ac | 844 | |
1c316e39 | 845 | seq_puts(m, "\n\tcaps:\t"); |
f7b422b1 | 846 | seq_printf(m, "caps=0x%x", nfss->caps); |
2d767432 CL |
847 | seq_printf(m, ",wtmult=%u", nfss->wtmult); |
848 | seq_printf(m, ",dtsize=%u", nfss->dtsize); | |
849 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
850 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
f7b422b1 | 851 | |
89d77c8f | 852 | #if IS_ENABLED(CONFIG_NFS_V4) |
40c55319 | 853 | if (nfss->nfs_client->rpc_ops->version == 4) { |
1c316e39 | 854 | seq_puts(m, "\n\tnfsv4:\t"); |
f7b422b1 DH |
855 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); |
856 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
a09df2ca | 857 | seq_printf(m, ",bm2=0x%x", nfss->attr_bitmask[2]); |
f7b422b1 | 858 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); |
ae50c0b5 BF |
859 | show_sessions(m, nfss); |
860 | show_pnfs(m, nfss); | |
1a7441b2 | 861 | show_lease(m, nfss); |
f7b422b1 DH |
862 | } |
863 | #endif | |
864 | ||
865 | /* | |
866 | * Display security flavor in effect for this mount | |
867 | */ | |
2d767432 | 868 | seq_printf(m, "\n\tsec:\tflavor=%u", auth->au_ops->au_flavor); |
f7b422b1 | 869 | if (auth->au_flavor) |
2d767432 | 870 | seq_printf(m, ",pseudoflavor=%u", auth->au_flavor); |
f7b422b1 DH |
871 | |
872 | /* | |
873 | * Display superblock I/O counters | |
874 | */ | |
875 | for_each_possible_cpu(cpu) { | |
876 | struct nfs_iostats *stats; | |
877 | ||
878 | preempt_disable(); | |
879 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
880 | ||
881 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
882 | totals.events[i] += stats->events[i]; | |
883 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
884 | totals.bytes[i] += stats->bytes[i]; | |
6a51091d DH |
885 | #ifdef CONFIG_NFS_FSCACHE |
886 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
887 | totals.fscache[i] += stats->fscache[i]; | |
888 | #endif | |
f7b422b1 DH |
889 | |
890 | preempt_enable(); | |
891 | } | |
892 | ||
1c316e39 | 893 | seq_puts(m, "\n\tevents:\t"); |
f7b422b1 DH |
894 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) |
895 | seq_printf(m, "%lu ", totals.events[i]); | |
1c316e39 | 896 | seq_puts(m, "\n\tbytes:\t"); |
f7b422b1 DH |
897 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) |
898 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
6a51091d DH |
899 | #ifdef CONFIG_NFS_FSCACHE |
900 | if (nfss->options & NFS_OPTION_FSCACHE) { | |
1c316e39 | 901 | seq_puts(m, "\n\tfsc:\t"); |
6a51091d | 902 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) |
ce85bd29 | 903 | seq_printf(m, "%Lu ", totals.fscache[i]); |
6a51091d DH |
904 | } |
905 | #endif | |
9bcaa35c | 906 | seq_putc(m, '\n'); |
f7b422b1 | 907 | |
016583d7 | 908 | rpc_clnt_show_stats(m, nfss->client); |
f7b422b1 DH |
909 | |
910 | return 0; | |
911 | } | |
89d77c8f | 912 | EXPORT_SYMBOL_GPL(nfs_show_stats); |
f7b422b1 DH |
913 | |
914 | /* | |
915 | * Begin unmount by attempting to remove all automounted mountpoints we added | |
54ceac45 | 916 | * in response to xdev traversals and referrals |
f7b422b1 | 917 | */ |
fbdefd64 | 918 | void nfs_umount_begin(struct super_block *sb) |
f7b422b1 | 919 | { |
67e55205 | 920 | struct nfs_server *server; |
fc6ae3cf TM |
921 | struct rpc_clnt *rpc; |
922 | ||
67e55205 | 923 | server = NFS_SB(sb); |
fc6ae3cf TM |
924 | /* -EIO all pending I/O */ |
925 | rpc = server->client_acl; | |
926 | if (!IS_ERR(rpc)) | |
927 | rpc_killall_tasks(rpc); | |
928 | rpc = server->client; | |
929 | if (!IS_ERR(rpc)) | |
930 | rpc_killall_tasks(rpc); | |
f7b422b1 | 931 | } |
89d77c8f | 932 | EXPORT_SYMBOL_GPL(nfs_umount_begin); |
f7b422b1 | 933 | |
db833351 | 934 | static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void) |
9423a08a CL |
935 | { |
936 | struct nfs_parsed_mount_data *data; | |
937 | ||
938 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
939 | if (data) { | |
a956beda TM |
940 | data->timeo = NFS_UNSPEC_TIMEO; |
941 | data->retrans = NFS_UNSPEC_RETRANS; | |
9423a08a CL |
942 | data->acregmin = NFS_DEF_ACREGMIN; |
943 | data->acregmax = NFS_DEF_ACREGMAX; | |
944 | data->acdirmin = NFS_DEF_ACDIRMIN; | |
945 | data->acdirmax = NFS_DEF_ACDIRMAX; | |
c5811dbd | 946 | data->mount_server.port = NFS_UNSPEC_PORT; |
9423a08a | 947 | data->nfs_server.port = NFS_UNSPEC_PORT; |
c5811dbd | 948 | data->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
a3f73c27 | 949 | data->selected_flavor = RPC_AUTH_MAXFLAVOR; |
9423a08a | 950 | data->minorversion = 0; |
b72e4f42 | 951 | data->need_mount = true; |
9937347a | 952 | data->net = current->nsproxy->net_ns; |
204cc0cc | 953 | data->lsm_opts = NULL; |
9423a08a CL |
954 | } |
955 | return data; | |
956 | } | |
957 | ||
8a0d551a JL |
958 | static void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data *data) |
959 | { | |
960 | if (data) { | |
961 | kfree(data->client_address); | |
962 | kfree(data->mount_server.hostname); | |
963 | kfree(data->nfs_server.export_path); | |
964 | kfree(data->nfs_server.hostname); | |
965 | kfree(data->fscache_uniq); | |
966 | security_free_mnt_opts(&data->lsm_opts); | |
967 | kfree(data); | |
968 | } | |
969 | } | |
970 | ||
fc50d58f | 971 | /* |
cdcd7f9a CL |
972 | * Sanity-check a server address provided by the mount command. |
973 | * | |
974 | * Address family must be initialized, and address must not be | |
975 | * the ANY address for that family. | |
fc50d58f CL |
976 | */ |
977 | static int nfs_verify_server_address(struct sockaddr *addr) | |
978 | { | |
979 | switch (addr->sa_family) { | |
980 | case AF_INET: { | |
cdcd7f9a | 981 | struct sockaddr_in *sa = (struct sockaddr_in *)addr; |
e6f1cebf | 982 | return sa->sin_addr.s_addr != htonl(INADDR_ANY); |
cdcd7f9a CL |
983 | } |
984 | case AF_INET6: { | |
985 | struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr; | |
986 | return !ipv6_addr_any(sa); | |
fc50d58f CL |
987 | } |
988 | } | |
989 | ||
53a0b9c4 | 990 | dfprintk(MOUNT, "NFS: Invalid IP address specified\n"); |
fc50d58f CL |
991 | return 0; |
992 | } | |
993 | ||
4cfd74fc CL |
994 | /* |
995 | * Select between a default port value and a user-specified port value. | |
996 | * If a zero value is set, then autobind will be used. | |
997 | */ | |
f5855fec | 998 | static void nfs_set_port(struct sockaddr *sap, int *port, |
4cfd74fc CL |
999 | const unsigned short default_port) |
1000 | { | |
f5855fec TM |
1001 | if (*port == NFS_UNSPEC_PORT) |
1002 | *port = default_port; | |
4cfd74fc | 1003 | |
f5855fec | 1004 | rpc_set_port(sap, *port); |
4cfd74fc CL |
1005 | } |
1006 | ||
259875ef TM |
1007 | /* |
1008 | * Sanity check the NFS transport protocol. | |
1009 | * | |
1010 | */ | |
1011 | static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
1012 | { | |
1013 | switch (mnt->nfs_server.protocol) { | |
1014 | case XPRT_TRANSPORT_UDP: | |
1015 | case XPRT_TRANSPORT_TCP: | |
1016 | case XPRT_TRANSPORT_RDMA: | |
1017 | break; | |
1018 | default: | |
1019 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; | |
1020 | } | |
1021 | } | |
1022 | ||
1023 | /* | |
1024 | * For text based NFSv2/v3 mounts, the mount protocol transport default | |
1025 | * settings should depend upon the specified NFS transport. | |
1026 | */ | |
1027 | static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt) | |
1028 | { | |
1029 | nfs_validate_transport_protocol(mnt); | |
1030 | ||
1031 | if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP || | |
1032 | mnt->mount_server.protocol == XPRT_TRANSPORT_TCP) | |
1033 | return; | |
1034 | switch (mnt->nfs_server.protocol) { | |
1035 | case XPRT_TRANSPORT_UDP: | |
1036 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; | |
1037 | break; | |
1038 | case XPRT_TRANSPORT_TCP: | |
1039 | case XPRT_TRANSPORT_RDMA: | |
1040 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; | |
1041 | } | |
1042 | } | |
1043 | ||
4d4b69dd WAA |
1044 | /* |
1045 | * Add 'flavor' to 'auth_info' if not already present. | |
1046 | * Returns true if 'flavor' ends up in the list, false otherwise | |
1047 | */ | |
1048 | static bool nfs_auth_info_add(struct nfs_auth_info *auth_info, | |
1049 | rpc_authflavor_t flavor) | |
1050 | { | |
1051 | unsigned int i; | |
00216026 | 1052 | unsigned int max_flavor_len = ARRAY_SIZE(auth_info->flavors); |
4d4b69dd WAA |
1053 | |
1054 | /* make sure this flavor isn't already in the list */ | |
1055 | for (i = 0; i < auth_info->flavor_len; i++) { | |
1056 | if (flavor == auth_info->flavors[i]) | |
1057 | return true; | |
1058 | } | |
1059 | ||
1060 | if (auth_info->flavor_len + 1 >= max_flavor_len) { | |
1061 | dfprintk(MOUNT, "NFS: too many sec= flavors\n"); | |
1062 | return false; | |
1063 | } | |
1064 | ||
1065 | auth_info->flavors[auth_info->flavor_len++] = flavor; | |
1066 | return true; | |
1067 | } | |
1068 | ||
1069 | /* | |
1070 | * Return true if 'match' is in auth_info or auth_info is empty. | |
1071 | * Return false otherwise. | |
1072 | */ | |
1073 | bool nfs_auth_info_match(const struct nfs_auth_info *auth_info, | |
1074 | rpc_authflavor_t match) | |
1075 | { | |
1076 | int i; | |
1077 | ||
1078 | if (!auth_info->flavor_len) | |
1079 | return true; | |
1080 | ||
1081 | for (i = 0; i < auth_info->flavor_len; i++) { | |
1082 | if (auth_info->flavors[i] == match) | |
1083 | return true; | |
1084 | } | |
1085 | return false; | |
1086 | } | |
1087 | EXPORT_SYMBOL_GPL(nfs_auth_info_match); | |
1088 | ||
01060c89 CL |
1089 | /* |
1090 | * Parse the value of the 'sec=' option. | |
01060c89 CL |
1091 | */ |
1092 | static int nfs_parse_security_flavors(char *value, | |
1093 | struct nfs_parsed_mount_data *mnt) | |
1094 | { | |
1095 | substring_t args[MAX_OPT_ARGS]; | |
19e7b8d2 | 1096 | rpc_authflavor_t pseudoflavor; |
4d4b69dd | 1097 | char *p; |
01060c89 CL |
1098 | |
1099 | dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); | |
1100 | ||
4d4b69dd WAA |
1101 | while ((p = strsep(&value, ":")) != NULL) { |
1102 | switch (match_token(p, nfs_secflavor_tokens, args)) { | |
1103 | case Opt_sec_none: | |
1104 | pseudoflavor = RPC_AUTH_NULL; | |
1105 | break; | |
1106 | case Opt_sec_sys: | |
1107 | pseudoflavor = RPC_AUTH_UNIX; | |
1108 | break; | |
1109 | case Opt_sec_krb5: | |
1110 | pseudoflavor = RPC_AUTH_GSS_KRB5; | |
1111 | break; | |
1112 | case Opt_sec_krb5i: | |
1113 | pseudoflavor = RPC_AUTH_GSS_KRB5I; | |
1114 | break; | |
1115 | case Opt_sec_krb5p: | |
1116 | pseudoflavor = RPC_AUTH_GSS_KRB5P; | |
1117 | break; | |
1118 | case Opt_sec_lkey: | |
1119 | pseudoflavor = RPC_AUTH_GSS_LKEY; | |
1120 | break; | |
1121 | case Opt_sec_lkeyi: | |
1122 | pseudoflavor = RPC_AUTH_GSS_LKEYI; | |
1123 | break; | |
1124 | case Opt_sec_lkeyp: | |
1125 | pseudoflavor = RPC_AUTH_GSS_LKEYP; | |
1126 | break; | |
1127 | case Opt_sec_spkm: | |
1128 | pseudoflavor = RPC_AUTH_GSS_SPKM; | |
1129 | break; | |
1130 | case Opt_sec_spkmi: | |
1131 | pseudoflavor = RPC_AUTH_GSS_SPKMI; | |
1132 | break; | |
1133 | case Opt_sec_spkmp: | |
1134 | pseudoflavor = RPC_AUTH_GSS_SPKMP; | |
1135 | break; | |
1136 | default: | |
1137 | dfprintk(MOUNT, | |
1138 | "NFS: sec= option '%s' not recognized\n", p); | |
1139 | return 0; | |
1140 | } | |
1141 | ||
1142 | if (!nfs_auth_info_add(&mnt->auth_info, pseudoflavor)) | |
1143 | return 0; | |
01060c89 CL |
1144 | } |
1145 | ||
1146 | return 1; | |
1147 | } | |
1148 | ||
0d71b058 TM |
1149 | static int nfs_parse_version_string(char *string, |
1150 | struct nfs_parsed_mount_data *mnt, | |
1151 | substring_t *args) | |
1152 | { | |
1153 | mnt->flags &= ~NFS_MOUNT_VER3; | |
1154 | switch (match_token(string, nfs_vers_tokens, args)) { | |
1155 | case Opt_vers_2: | |
1156 | mnt->version = 2; | |
1157 | break; | |
1158 | case Opt_vers_3: | |
1159 | mnt->flags |= NFS_MOUNT_VER3; | |
1160 | mnt->version = 3; | |
1161 | break; | |
1162 | case Opt_vers_4: | |
1163 | /* Backward compatibility option. In future, | |
1164 | * the mount program should always supply | |
1165 | * a NFSv4 minor version number. | |
1166 | */ | |
1167 | mnt->version = 4; | |
1168 | break; | |
1169 | case Opt_vers_4_0: | |
1170 | mnt->version = 4; | |
1171 | mnt->minorversion = 0; | |
1172 | break; | |
1173 | case Opt_vers_4_1: | |
1174 | mnt->version = 4; | |
1175 | mnt->minorversion = 1; | |
1176 | break; | |
42c2c424 SD |
1177 | case Opt_vers_4_2: |
1178 | mnt->version = 4; | |
1179 | mnt->minorversion = 2; | |
1180 | break; | |
0d71b058 TM |
1181 | default: |
1182 | return 0; | |
1183 | } | |
1184 | return 1; | |
1185 | } | |
1186 | ||
c5cb09b6 RL |
1187 | static int nfs_get_option_str(substring_t args[], char **option) |
1188 | { | |
1189 | kfree(*option); | |
1190 | *option = match_strdup(args); | |
e25fbe38 | 1191 | return !*option; |
c5cb09b6 RL |
1192 | } |
1193 | ||
1194 | static int nfs_get_option_ul(substring_t args[], unsigned long *option) | |
1195 | { | |
1196 | int rc; | |
1197 | char *string; | |
1198 | ||
1199 | string = match_strdup(args); | |
1200 | if (string == NULL) | |
1201 | return -ENOMEM; | |
7297cb68 | 1202 | rc = kstrtoul(string, 10, option); |
c5cb09b6 RL |
1203 | kfree(string); |
1204 | ||
1205 | return rc; | |
1206 | } | |
1207 | ||
a956beda TM |
1208 | static int nfs_get_option_ul_bound(substring_t args[], unsigned long *option, |
1209 | unsigned long l_bound, unsigned long u_bound) | |
1210 | { | |
1211 | int ret; | |
1212 | ||
1213 | ret = nfs_get_option_ul(args, option); | |
1214 | if (ret != 0) | |
1215 | return ret; | |
1216 | if (*option < l_bound || *option > u_bound) | |
1217 | return -ERANGE; | |
1218 | return 0; | |
1219 | } | |
1220 | ||
bf0fd768 CL |
1221 | /* |
1222 | * Error-check and convert a string of mount options from user space into | |
f45663ce CL |
1223 | * a data structure. The whole mount string is processed; bad options are |
1224 | * skipped as they are encountered. If there were no errors, return 1; | |
1225 | * otherwise return 0 (zero). | |
bf0fd768 CL |
1226 | */ |
1227 | static int nfs_parse_mount_options(char *raw, | |
1228 | struct nfs_parsed_mount_data *mnt) | |
1229 | { | |
f5c0c26d | 1230 | char *p, *string; |
d23c45fd | 1231 | int rc, sloppy = 0, invalid_option = 0; |
ee671b01 JL |
1232 | unsigned short protofamily = AF_UNSPEC; |
1233 | unsigned short mountfamily = AF_UNSPEC; | |
bf0fd768 CL |
1234 | |
1235 | if (!raw) { | |
1236 | dfprintk(MOUNT, "NFS: mount options string was NULL.\n"); | |
1237 | return 1; | |
1238 | } | |
1239 | dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw); | |
1240 | ||
f5c0c26d | 1241 | rc = security_sb_eat_lsm_opts(raw, &mnt->lsm_opts); |
f9c3a380 EP |
1242 | if (rc) |
1243 | goto out_security_failure; | |
1244 | ||
bf0fd768 CL |
1245 | while ((p = strsep(&raw, ",")) != NULL) { |
1246 | substring_t args[MAX_OPT_ARGS]; | |
a5a16bae CL |
1247 | unsigned long option; |
1248 | int token; | |
bf0fd768 CL |
1249 | |
1250 | if (!*p) | |
1251 | continue; | |
1252 | ||
1253 | dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); | |
1254 | ||
1255 | token = match_token(p, nfs_mount_option_tokens, args); | |
1256 | switch (token) { | |
f45663ce CL |
1257 | |
1258 | /* | |
1259 | * boolean options: foo/nofoo | |
1260 | */ | |
bf0fd768 CL |
1261 | case Opt_soft: |
1262 | mnt->flags |= NFS_MOUNT_SOFT; | |
91a575e1 | 1263 | mnt->flags &= ~NFS_MOUNT_SOFTERR; |
bf0fd768 | 1264 | break; |
91a575e1 TM |
1265 | case Opt_softerr: |
1266 | mnt->flags |= NFS_MOUNT_SOFTERR; | |
bf0fd768 CL |
1267 | mnt->flags &= ~NFS_MOUNT_SOFT; |
1268 | break; | |
91a575e1 TM |
1269 | case Opt_hard: |
1270 | mnt->flags &= ~(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR); | |
1271 | break; | |
bf0fd768 CL |
1272 | case Opt_posix: |
1273 | mnt->flags |= NFS_MOUNT_POSIX; | |
1274 | break; | |
1275 | case Opt_noposix: | |
1276 | mnt->flags &= ~NFS_MOUNT_POSIX; | |
1277 | break; | |
1278 | case Opt_cto: | |
1279 | mnt->flags &= ~NFS_MOUNT_NOCTO; | |
1280 | break; | |
1281 | case Opt_nocto: | |
1282 | mnt->flags |= NFS_MOUNT_NOCTO; | |
1283 | break; | |
1284 | case Opt_ac: | |
1285 | mnt->flags &= ~NFS_MOUNT_NOAC; | |
1286 | break; | |
1287 | case Opt_noac: | |
1288 | mnt->flags |= NFS_MOUNT_NOAC; | |
1289 | break; | |
1290 | case Opt_lock: | |
1291 | mnt->flags &= ~NFS_MOUNT_NONLM; | |
5eebde23 SJ |
1292 | mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | |
1293 | NFS_MOUNT_LOCAL_FCNTL); | |
bf0fd768 CL |
1294 | break; |
1295 | case Opt_nolock: | |
1296 | mnt->flags |= NFS_MOUNT_NONLM; | |
5eebde23 SJ |
1297 | mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | |
1298 | NFS_MOUNT_LOCAL_FCNTL); | |
bf0fd768 | 1299 | break; |
bf0fd768 CL |
1300 | case Opt_udp: |
1301 | mnt->flags &= ~NFS_MOUNT_TCP; | |
0896a725 | 1302 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 CL |
1303 | break; |
1304 | case Opt_tcp: | |
1305 | mnt->flags |= NFS_MOUNT_TCP; | |
0896a725 | 1306 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1307 | break; |
2cf7ff7a TT |
1308 | case Opt_rdma: |
1309 | mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ | |
1310 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 1311 | xprt_load_transport(p); |
2cf7ff7a | 1312 | break; |
bf0fd768 CL |
1313 | case Opt_acl: |
1314 | mnt->flags &= ~NFS_MOUNT_NOACL; | |
1315 | break; | |
1316 | case Opt_noacl: | |
1317 | mnt->flags |= NFS_MOUNT_NOACL; | |
1318 | break; | |
1319 | case Opt_rdirplus: | |
1320 | mnt->flags &= ~NFS_MOUNT_NORDIRPLUS; | |
1321 | break; | |
1322 | case Opt_nordirplus: | |
1323 | mnt->flags |= NFS_MOUNT_NORDIRPLUS; | |
1324 | break; | |
75180df2 TM |
1325 | case Opt_sharecache: |
1326 | mnt->flags &= ~NFS_MOUNT_UNSHARED; | |
1327 | break; | |
1328 | case Opt_nosharecache: | |
1329 | mnt->flags |= NFS_MOUNT_UNSHARED; | |
1330 | break; | |
d740351b CL |
1331 | case Opt_resvport: |
1332 | mnt->flags &= ~NFS_MOUNT_NORESVPORT; | |
1333 | break; | |
1334 | case Opt_noresvport: | |
1335 | mnt->flags |= NFS_MOUNT_NORESVPORT; | |
1336 | break; | |
b797cac7 DH |
1337 | case Opt_fscache: |
1338 | mnt->options |= NFS_OPTION_FSCACHE; | |
1339 | kfree(mnt->fscache_uniq); | |
1340 | mnt->fscache_uniq = NULL; | |
1341 | break; | |
1342 | case Opt_nofscache: | |
1343 | mnt->options &= ~NFS_OPTION_FSCACHE; | |
1344 | kfree(mnt->fscache_uniq); | |
1345 | mnt->fscache_uniq = NULL; | |
1346 | break; | |
89652617 CL |
1347 | case Opt_migration: |
1348 | mnt->options |= NFS_OPTION_MIGRATION; | |
1349 | break; | |
1350 | case Opt_nomigration: | |
f02fee22 | 1351 | mnt->options &= ~NFS_OPTION_MIGRATION; |
89652617 | 1352 | break; |
bf0fd768 | 1353 | |
f45663ce CL |
1354 | /* |
1355 | * options that take numeric values | |
1356 | */ | |
bf0fd768 | 1357 | case Opt_port: |
c5cb09b6 RL |
1358 | if (nfs_get_option_ul(args, &option) || |
1359 | option > USHRT_MAX) | |
d23c45fd CL |
1360 | goto out_invalid_value; |
1361 | mnt->nfs_server.port = option; | |
bf0fd768 CL |
1362 | break; |
1363 | case Opt_rsize: | |
c5cb09b6 | 1364 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1365 | goto out_invalid_value; |
1366 | mnt->rsize = option; | |
bf0fd768 CL |
1367 | break; |
1368 | case Opt_wsize: | |
c5cb09b6 | 1369 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1370 | goto out_invalid_value; |
1371 | mnt->wsize = option; | |
bf0fd768 CL |
1372 | break; |
1373 | case Opt_bsize: | |
c5cb09b6 | 1374 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1375 | goto out_invalid_value; |
1376 | mnt->bsize = option; | |
bf0fd768 CL |
1377 | break; |
1378 | case Opt_timeo: | |
a956beda | 1379 | if (nfs_get_option_ul_bound(args, &option, 1, INT_MAX)) |
d23c45fd CL |
1380 | goto out_invalid_value; |
1381 | mnt->timeo = option; | |
bf0fd768 CL |
1382 | break; |
1383 | case Opt_retrans: | |
a956beda | 1384 | if (nfs_get_option_ul_bound(args, &option, 0, INT_MAX)) |
d23c45fd CL |
1385 | goto out_invalid_value; |
1386 | mnt->retrans = option; | |
bf0fd768 CL |
1387 | break; |
1388 | case Opt_acregmin: | |
c5cb09b6 | 1389 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1390 | goto out_invalid_value; |
1391 | mnt->acregmin = option; | |
bf0fd768 CL |
1392 | break; |
1393 | case Opt_acregmax: | |
c5cb09b6 | 1394 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1395 | goto out_invalid_value; |
1396 | mnt->acregmax = option; | |
bf0fd768 CL |
1397 | break; |
1398 | case Opt_acdirmin: | |
c5cb09b6 | 1399 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1400 | goto out_invalid_value; |
1401 | mnt->acdirmin = option; | |
bf0fd768 CL |
1402 | break; |
1403 | case Opt_acdirmax: | |
c5cb09b6 | 1404 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1405 | goto out_invalid_value; |
1406 | mnt->acdirmax = option; | |
bf0fd768 CL |
1407 | break; |
1408 | case Opt_actimeo: | |
c5cb09b6 | 1409 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1410 | goto out_invalid_value; |
1411 | mnt->acregmin = mnt->acregmax = | |
1412 | mnt->acdirmin = mnt->acdirmax = option; | |
bf0fd768 CL |
1413 | break; |
1414 | case Opt_namelen: | |
c5cb09b6 | 1415 | if (nfs_get_option_ul(args, &option)) |
d23c45fd CL |
1416 | goto out_invalid_value; |
1417 | mnt->namlen = option; | |
bf0fd768 CL |
1418 | break; |
1419 | case Opt_mountport: | |
c5cb09b6 RL |
1420 | if (nfs_get_option_ul(args, &option) || |
1421 | option > USHRT_MAX) | |
d23c45fd CL |
1422 | goto out_invalid_value; |
1423 | mnt->mount_server.port = option; | |
bf0fd768 | 1424 | break; |
bf0fd768 | 1425 | case Opt_mountvers: |
c5cb09b6 | 1426 | if (nfs_get_option_ul(args, &option) || |
f45663ce | 1427 | option < NFS_MNT_VERSION || |
d23c45fd CL |
1428 | option > NFS_MNT3_VERSION) |
1429 | goto out_invalid_value; | |
1430 | mnt->mount_server.version = option; | |
bf0fd768 | 1431 | break; |
3fd5be9e | 1432 | case Opt_minorversion: |
c5cb09b6 | 1433 | if (nfs_get_option_ul(args, &option)) |
f3f4f4ed CL |
1434 | goto out_invalid_value; |
1435 | if (option > NFS4_MAX_MINOR_VERSION) | |
1436 | goto out_invalid_value; | |
1437 | mnt->minorversion = option; | |
3fd5be9e | 1438 | break; |
bf0fd768 | 1439 | |
f45663ce CL |
1440 | /* |
1441 | * options that take text values | |
1442 | */ | |
0d71b058 TM |
1443 | case Opt_nfsvers: |
1444 | string = match_strdup(args); | |
1445 | if (string == NULL) | |
1446 | goto out_nomem; | |
1447 | rc = nfs_parse_version_string(string, mnt, args); | |
1448 | kfree(string); | |
1449 | if (!rc) | |
1450 | goto out_invalid_value; | |
1451 | break; | |
bf0fd768 CL |
1452 | case Opt_sec: |
1453 | string = match_strdup(args); | |
1454 | if (string == NULL) | |
1455 | goto out_nomem; | |
01060c89 | 1456 | rc = nfs_parse_security_flavors(string, mnt); |
bf0fd768 | 1457 | kfree(string); |
f45663ce | 1458 | if (!rc) { |
f45663ce CL |
1459 | dfprintk(MOUNT, "NFS: unrecognized " |
1460 | "security flavor\n"); | |
d23c45fd | 1461 | return 0; |
f45663ce | 1462 | } |
bf0fd768 CL |
1463 | break; |
1464 | case Opt_proto: | |
1465 | string = match_strdup(args); | |
1466 | if (string == NULL) | |
1467 | goto out_nomem; | |
1468 | token = match_token(string, | |
1469 | nfs_xprt_protocol_tokens, args); | |
bf0fd768 | 1470 | |
ee671b01 | 1471 | protofamily = AF_INET; |
bf0fd768 | 1472 | switch (token) { |
ee671b01 JL |
1473 | case Opt_xprt_udp6: |
1474 | protofamily = AF_INET6; | |
fd53dde8 | 1475 | /* fall through */ |
fdb66ff4 | 1476 | case Opt_xprt_udp: |
bf0fd768 | 1477 | mnt->flags &= ~NFS_MOUNT_TCP; |
0896a725 | 1478 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 | 1479 | break; |
ee671b01 JL |
1480 | case Opt_xprt_tcp6: |
1481 | protofamily = AF_INET6; | |
fd53dde8 | 1482 | /* fall through */ |
fdb66ff4 | 1483 | case Opt_xprt_tcp: |
bf0fd768 | 1484 | mnt->flags |= NFS_MOUNT_TCP; |
0896a725 | 1485 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1486 | break; |
181342c5 SM |
1487 | case Opt_xprt_rdma6: |
1488 | protofamily = AF_INET6; | |
fd53dde8 | 1489 | /* fall through */ |
2cf7ff7a TT |
1490 | case Opt_xprt_rdma: |
1491 | /* vector side protocols to TCP */ | |
1492 | mnt->flags |= NFS_MOUNT_TCP; | |
1493 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; | |
a67d18f8 | 1494 | xprt_load_transport(string); |
2cf7ff7a | 1495 | break; |
bf0fd768 | 1496 | default: |
f45663ce CL |
1497 | dfprintk(MOUNT, "NFS: unrecognized " |
1498 | "transport protocol\n"); | |
4223a4a1 | 1499 | kfree(string); |
d23c45fd | 1500 | return 0; |
bf0fd768 | 1501 | } |
c5cb09b6 | 1502 | kfree(string); |
bf0fd768 CL |
1503 | break; |
1504 | case Opt_mountproto: | |
1505 | string = match_strdup(args); | |
1506 | if (string == NULL) | |
1507 | goto out_nomem; | |
1508 | token = match_token(string, | |
1509 | nfs_xprt_protocol_tokens, args); | |
d508afb4 | 1510 | kfree(string); |
bf0fd768 | 1511 | |
ee671b01 | 1512 | mountfamily = AF_INET; |
bf0fd768 | 1513 | switch (token) { |
ee671b01 JL |
1514 | case Opt_xprt_udp6: |
1515 | mountfamily = AF_INET6; | |
fd53dde8 | 1516 | /* fall through */ |
fdb66ff4 | 1517 | case Opt_xprt_udp: |
0896a725 | 1518 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; |
bf0fd768 | 1519 | break; |
ee671b01 JL |
1520 | case Opt_xprt_tcp6: |
1521 | mountfamily = AF_INET6; | |
fd53dde8 | 1522 | /* fall through */ |
fdb66ff4 | 1523 | case Opt_xprt_tcp: |
0896a725 | 1524 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; |
bf0fd768 | 1525 | break; |
2cf7ff7a | 1526 | case Opt_xprt_rdma: /* not used for side protocols */ |
bf0fd768 | 1527 | default: |
f45663ce CL |
1528 | dfprintk(MOUNT, "NFS: unrecognized " |
1529 | "transport protocol\n"); | |
d23c45fd | 1530 | return 0; |
bf0fd768 CL |
1531 | } |
1532 | break; | |
1533 | case Opt_addr: | |
1534 | string = match_strdup(args); | |
1535 | if (string == NULL) | |
1536 | goto out_nomem; | |
53a0b9c4 | 1537 | mnt->nfs_server.addrlen = |
b48e1278 | 1538 | rpc_pton(mnt->net, string, strlen(string), |
53a0b9c4 CL |
1539 | (struct sockaddr *) |
1540 | &mnt->nfs_server.address, | |
1541 | sizeof(mnt->nfs_server.address)); | |
bf0fd768 | 1542 | kfree(string); |
53a0b9c4 CL |
1543 | if (mnt->nfs_server.addrlen == 0) |
1544 | goto out_invalid_address; | |
bf0fd768 CL |
1545 | break; |
1546 | case Opt_clientaddr: | |
c5cb09b6 | 1547 | if (nfs_get_option_str(args, &mnt->client_address)) |
bf0fd768 | 1548 | goto out_nomem; |
bf0fd768 | 1549 | break; |
33832034 | 1550 | case Opt_mounthost: |
c5cb09b6 RL |
1551 | if (nfs_get_option_str(args, |
1552 | &mnt->mount_server.hostname)) | |
33832034 | 1553 | goto out_nomem; |
33832034 | 1554 | break; |
0ac83779 | 1555 | case Opt_mountaddr: |
bf0fd768 CL |
1556 | string = match_strdup(args); |
1557 | if (string == NULL) | |
1558 | goto out_nomem; | |
53a0b9c4 | 1559 | mnt->mount_server.addrlen = |
b48e1278 | 1560 | rpc_pton(mnt->net, string, strlen(string), |
53a0b9c4 CL |
1561 | (struct sockaddr *) |
1562 | &mnt->mount_server.address, | |
1563 | sizeof(mnt->mount_server.address)); | |
bf0fd768 | 1564 | kfree(string); |
53a0b9c4 CL |
1565 | if (mnt->mount_server.addrlen == 0) |
1566 | goto out_invalid_address; | |
bf0fd768 | 1567 | break; |
28cc5cd8 TM |
1568 | case Opt_nconnect: |
1569 | if (nfs_get_option_ul_bound(args, &option, 1, NFS_MAX_CONNECTIONS)) | |
1570 | goto out_invalid_value; | |
1571 | mnt->nfs_server.nconnect = option; | |
1572 | break; | |
7973c1f1 TM |
1573 | case Opt_lookupcache: |
1574 | string = match_strdup(args); | |
1575 | if (string == NULL) | |
1576 | goto out_nomem; | |
1577 | token = match_token(string, | |
1578 | nfs_lookupcache_tokens, args); | |
1579 | kfree(string); | |
1580 | switch (token) { | |
1581 | case Opt_lookupcache_all: | |
1582 | mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); | |
1583 | break; | |
1584 | case Opt_lookupcache_positive: | |
1585 | mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1586 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; | |
1587 | break; | |
1588 | case Opt_lookupcache_none: | |
1589 | mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; | |
1590 | break; | |
1591 | default: | |
7973c1f1 TM |
1592 | dfprintk(MOUNT, "NFS: invalid " |
1593 | "lookupcache argument\n"); | |
d23c45fd | 1594 | return 0; |
7973c1f1 TM |
1595 | }; |
1596 | break; | |
a6d5ff64 | 1597 | case Opt_fscache_uniq: |
c5cb09b6 | 1598 | if (nfs_get_option_str(args, &mnt->fscache_uniq)) |
a6d5ff64 | 1599 | goto out_nomem; |
a6d5ff64 CL |
1600 | mnt->options |= NFS_OPTION_FSCACHE; |
1601 | break; | |
5eebde23 SJ |
1602 | case Opt_local_lock: |
1603 | string = match_strdup(args); | |
1604 | if (string == NULL) | |
1605 | goto out_nomem; | |
1606 | token = match_token(string, nfs_local_lock_tokens, | |
1607 | args); | |
1608 | kfree(string); | |
1609 | switch (token) { | |
1610 | case Opt_local_lock_all: | |
1611 | mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | | |
1612 | NFS_MOUNT_LOCAL_FCNTL); | |
1613 | break; | |
1614 | case Opt_local_lock_flock: | |
1615 | mnt->flags |= NFS_MOUNT_LOCAL_FLOCK; | |
1616 | break; | |
1617 | case Opt_local_lock_posix: | |
1618 | mnt->flags |= NFS_MOUNT_LOCAL_FCNTL; | |
1619 | break; | |
1620 | case Opt_local_lock_none: | |
1621 | mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | | |
1622 | NFS_MOUNT_LOCAL_FCNTL); | |
1623 | break; | |
1624 | default: | |
1625 | dfprintk(MOUNT, "NFS: invalid " | |
1626 | "local_lock argument\n"); | |
1627 | return 0; | |
1628 | }; | |
1629 | break; | |
bf0fd768 | 1630 | |
f45663ce CL |
1631 | /* |
1632 | * Special options | |
1633 | */ | |
1634 | case Opt_sloppy: | |
1635 | sloppy = 1; | |
1636 | dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); | |
1637 | break; | |
bf0fd768 CL |
1638 | case Opt_userspace: |
1639 | case Opt_deprecated: | |
d33e4dfe CL |
1640 | dfprintk(MOUNT, "NFS: ignoring mount option " |
1641 | "'%s'\n", p); | |
bf0fd768 CL |
1642 | break; |
1643 | ||
1644 | default: | |
d23c45fd | 1645 | invalid_option = 1; |
f45663ce CL |
1646 | dfprintk(MOUNT, "NFS: unrecognized mount option " |
1647 | "'%s'\n", p); | |
bf0fd768 CL |
1648 | } |
1649 | } | |
1650 | ||
d23c45fd CL |
1651 | if (!sloppy && invalid_option) |
1652 | return 0; | |
1653 | ||
571b7554 WAA |
1654 | if (mnt->minorversion && mnt->version != 4) |
1655 | goto out_minorversion_mismatch; | |
1656 | ||
89652617 | 1657 | if (mnt->options & NFS_OPTION_MIGRATION && |
9e08ef1a | 1658 | (mnt->version != 4 || mnt->minorversion != 0)) |
89652617 CL |
1659 | goto out_migration_misuse; |
1660 | ||
ee671b01 JL |
1661 | /* |
1662 | * verify that any proto=/mountproto= options match the address | |
1856b225 | 1663 | * families in the addr=/mountaddr= options. |
ee671b01 JL |
1664 | */ |
1665 | if (protofamily != AF_UNSPEC && | |
1666 | protofamily != mnt->nfs_server.address.ss_family) | |
1667 | goto out_proto_mismatch; | |
1668 | ||
1669 | if (mountfamily != AF_UNSPEC) { | |
1670 | if (mnt->mount_server.addrlen) { | |
1671 | if (mountfamily != mnt->mount_server.address.ss_family) | |
1672 | goto out_mountproto_mismatch; | |
1673 | } else { | |
1674 | if (mountfamily != mnt->nfs_server.address.ss_family) | |
1675 | goto out_mountproto_mismatch; | |
1676 | } | |
1677 | } | |
1678 | ||
bf0fd768 CL |
1679 | return 1; |
1680 | ||
ee671b01 JL |
1681 | out_mountproto_mismatch: |
1682 | printk(KERN_INFO "NFS: mount server address does not match mountproto= " | |
1683 | "option\n"); | |
1684 | return 0; | |
1685 | out_proto_mismatch: | |
1686 | printk(KERN_INFO "NFS: server address does not match proto= option\n"); | |
1687 | return 0; | |
53a0b9c4 CL |
1688 | out_invalid_address: |
1689 | printk(KERN_INFO "NFS: bad IP address specified: %s\n", p); | |
1690 | return 0; | |
d23c45fd | 1691 | out_invalid_value: |
53a0b9c4 | 1692 | printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); |
d23c45fd | 1693 | return 0; |
571b7554 WAA |
1694 | out_minorversion_mismatch: |
1695 | printk(KERN_INFO "NFS: mount option vers=%u does not support " | |
1696 | "minorversion=%u\n", mnt->version, mnt->minorversion); | |
1697 | return 0; | |
89652617 CL |
1698 | out_migration_misuse: |
1699 | printk(KERN_INFO | |
1700 | "NFS: 'migration' not supported for this NFS version\n"); | |
1701 | return 0; | |
bf0fd768 CL |
1702 | out_nomem: |
1703 | printk(KERN_INFO "NFS: not enough memory to parse option\n"); | |
1704 | return 0; | |
f9c3a380 | 1705 | out_security_failure: |
f9c3a380 EP |
1706 | printk(KERN_INFO "NFS: security options invalid: %d\n", rc); |
1707 | return 0; | |
bf0fd768 CL |
1708 | } |
1709 | ||
ec88f28d | 1710 | /* |
4d4b69dd WAA |
1711 | * Ensure that a specified authtype in args->auth_info is supported by |
1712 | * the server. Returns 0 and sets args->selected_flavor if it's ok, and | |
1713 | * -EACCES if not. | |
ec88f28d | 1714 | */ |
4d4b69dd | 1715 | static int nfs_verify_authflavors(struct nfs_parsed_mount_data *args, |
9111c95b | 1716 | rpc_authflavor_t *server_authlist, unsigned int count) |
ec88f28d | 1717 | { |
4d4b69dd | 1718 | rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; |
53a75f22 | 1719 | bool found_auth_null = false; |
9111c95b | 1720 | unsigned int i; |
4580a92d | 1721 | |
d497ab97 WAA |
1722 | /* |
1723 | * If the sec= mount option is used, the specified flavor or AUTH_NULL | |
1724 | * must be in the list returned by the server. | |
1725 | * | |
1726 | * AUTH_NULL has a special meaning when it's in the server list - it | |
1727 | * means that the server will ignore the rpc creds, so any flavor | |
e68fd7c8 | 1728 | * can be used but still use the sec= that was specified. |
53a75f22 CL |
1729 | * |
1730 | * Note also that the MNT procedure in MNTv1 does not return a list | |
1731 | * of supported security flavors. In this case, nfs_mount() fabricates | |
1732 | * a security flavor list containing just AUTH_NULL. | |
d497ab97 | 1733 | */ |
4580a92d | 1734 | for (i = 0; i < count; i++) { |
4d4b69dd WAA |
1735 | flavor = server_authlist[i]; |
1736 | ||
e68fd7c8 | 1737 | if (nfs_auth_info_match(&args->auth_info, flavor)) |
9111c95b | 1738 | goto out; |
e68fd7c8 SD |
1739 | |
1740 | if (flavor == RPC_AUTH_NULL) | |
53a75f22 | 1741 | found_auth_null = true; |
e68fd7c8 SD |
1742 | } |
1743 | ||
53a75f22 CL |
1744 | if (found_auth_null) { |
1745 | flavor = args->auth_info.flavors[0]; | |
e68fd7c8 | 1746 | goto out; |
4580a92d | 1747 | } |
ec88f28d | 1748 | |
4d4b69dd WAA |
1749 | dfprintk(MOUNT, |
1750 | "NFS: specified auth flavors not supported by server\n"); | |
9111c95b | 1751 | return -EACCES; |
d497ab97 | 1752 | |
4580a92d | 1753 | out: |
4d4b69dd | 1754 | args->selected_flavor = flavor; |
a3f73c27 | 1755 | dfprintk(MOUNT, "NFS: using auth flavor %u\n", args->selected_flavor); |
d497ab97 | 1756 | return 0; |
ec88f28d CL |
1757 | } |
1758 | ||
0076d7b7 CL |
1759 | /* |
1760 | * Use the remote server's MOUNT service to request the NFS file handle | |
1761 | * corresponding to the provided path. | |
1762 | */ | |
486aa699 | 1763 | static int nfs_request_mount(struct nfs_parsed_mount_data *args, |
294ae81d JL |
1764 | struct nfs_fh *root_fh, |
1765 | rpc_authflavor_t *server_authlist, | |
1766 | unsigned int *server_authlist_len) | |
0076d7b7 | 1767 | { |
c5d120f8 CL |
1768 | struct nfs_mount_request request = { |
1769 | .sap = (struct sockaddr *) | |
1770 | &args->mount_server.address, | |
1771 | .dirpath = args->nfs_server.export_path, | |
1772 | .protocol = args->mount_server.protocol, | |
1773 | .fh = root_fh, | |
50a737f8 | 1774 | .noresvport = args->flags & NFS_MOUNT_NORESVPORT, |
294ae81d | 1775 | .auth_flav_len = server_authlist_len, |
ec88f28d | 1776 | .auth_flavs = server_authlist, |
6d59b8d5 | 1777 | .net = args->net, |
c5d120f8 | 1778 | }; |
4c568017 | 1779 | int status; |
0076d7b7 CL |
1780 | |
1781 | if (args->mount_server.version == 0) { | |
8a6e5deb TM |
1782 | switch (args->version) { |
1783 | default: | |
1784 | args->mount_server.version = NFS_MNT3_VERSION; | |
1785 | break; | |
1786 | case 2: | |
1787 | args->mount_server.version = NFS_MNT_VERSION; | |
1788 | } | |
0076d7b7 | 1789 | } |
c5d120f8 | 1790 | request.version = args->mount_server.version; |
0076d7b7 | 1791 | |
33832034 | 1792 | if (args->mount_server.hostname) |
c5d120f8 | 1793 | request.hostname = args->mount_server.hostname; |
33832034 | 1794 | else |
c5d120f8 | 1795 | request.hostname = args->nfs_server.hostname; |
33832034 | 1796 | |
0076d7b7 CL |
1797 | /* |
1798 | * Construct the mount server's address. | |
1799 | */ | |
4c568017 | 1800 | if (args->mount_server.address.ss_family == AF_UNSPEC) { |
c5d120f8 | 1801 | memcpy(request.sap, &args->nfs_server.address, |
4c568017 CL |
1802 | args->nfs_server.addrlen); |
1803 | args->mount_server.addrlen = args->nfs_server.addrlen; | |
1804 | } | |
c5d120f8 | 1805 | request.salen = args->mount_server.addrlen; |
f5855fec | 1806 | nfs_set_port(request.sap, &args->mount_server.port, 0); |
0076d7b7 CL |
1807 | |
1808 | /* | |
1809 | * Now ask the mount server to map our export path | |
1810 | * to a file handle. | |
1811 | */ | |
c5d120f8 | 1812 | status = nfs_mount(&request); |
ec88f28d CL |
1813 | if (status != 0) { |
1814 | dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n", | |
1815 | request.hostname, status); | |
1816 | return status; | |
1817 | } | |
0076d7b7 | 1818 | |
9111c95b | 1819 | return 0; |
0076d7b7 CL |
1820 | } |
1821 | ||
d17540c6 JL |
1822 | static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_info, |
1823 | struct nfs_subversion *nfs_mod) | |
1824 | { | |
1825 | int status; | |
9111c95b JL |
1826 | unsigned int i; |
1827 | bool tried_auth_unix = false; | |
1828 | bool auth_null_in_list = false; | |
1829 | struct nfs_server *server = ERR_PTR(-EACCES); | |
294ae81d JL |
1830 | struct nfs_parsed_mount_data *args = mount_info->parsed; |
1831 | rpc_authflavor_t authlist[NFS_MAX_SECFLAVORS]; | |
1832 | unsigned int authlist_len = ARRAY_SIZE(authlist); | |
d17540c6 | 1833 | |
294ae81d JL |
1834 | status = nfs_request_mount(args, mount_info->mntfh, authlist, |
1835 | &authlist_len); | |
d17540c6 JL |
1836 | if (status) |
1837 | return ERR_PTR(status); | |
1838 | ||
9111c95b JL |
1839 | /* |
1840 | * Was a sec= authflavor specified in the options? First, verify | |
1841 | * whether the server supports it, and then just try to use it if so. | |
1842 | */ | |
a3f73c27 | 1843 | if (args->auth_info.flavor_len > 0) { |
4d4b69dd | 1844 | status = nfs_verify_authflavors(args, authlist, authlist_len); |
a3f73c27 WAA |
1845 | dfprintk(MOUNT, "NFS: using auth flavor %u\n", |
1846 | args->selected_flavor); | |
9111c95b JL |
1847 | if (status) |
1848 | return ERR_PTR(status); | |
1849 | return nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); | |
1850 | } | |
1851 | ||
1852 | /* | |
1853 | * No sec= option was provided. RFC 2623, section 2.7 suggests we | |
1854 | * SHOULD prefer the flavor listed first. However, some servers list | |
1855 | * AUTH_NULL first. Avoid ever choosing AUTH_NULL. | |
1856 | */ | |
1857 | for (i = 0; i < authlist_len; ++i) { | |
1858 | rpc_authflavor_t flavor; | |
1859 | struct rpcsec_gss_info info; | |
1860 | ||
1861 | flavor = authlist[i]; | |
1862 | switch (flavor) { | |
1863 | case RPC_AUTH_UNIX: | |
1864 | tried_auth_unix = true; | |
1865 | break; | |
1866 | case RPC_AUTH_NULL: | |
1867 | auth_null_in_list = true; | |
1868 | continue; | |
1869 | default: | |
1870 | if (rpcauth_get_gssinfo(flavor, &info) != 0) | |
1871 | continue; | |
1872 | /* Fallthrough */ | |
1873 | } | |
1874 | dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", flavor); | |
a3f73c27 | 1875 | args->selected_flavor = flavor; |
9111c95b JL |
1876 | server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); |
1877 | if (!IS_ERR(server)) | |
1878 | return server; | |
1879 | } | |
1880 | ||
1881 | /* | |
1882 | * Nothing we tried so far worked. At this point, give up if we've | |
1883 | * already tried AUTH_UNIX or if the server's list doesn't contain | |
1884 | * AUTH_NULL | |
1885 | */ | |
1886 | if (tried_auth_unix || !auth_null_in_list) | |
1887 | return server; | |
1888 | ||
1889 | /* Last chance! Try AUTH_UNIX */ | |
1890 | dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", RPC_AUTH_UNIX); | |
a3f73c27 | 1891 | args->selected_flavor = RPC_AUTH_UNIX; |
d17540c6 JL |
1892 | return nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); |
1893 | } | |
1894 | ||
ff9099f2 BS |
1895 | struct dentry *nfs_try_mount(int flags, const char *dev_name, |
1896 | struct nfs_mount_info *mount_info, | |
1897 | struct nfs_subversion *nfs_mod) | |
486aa699 | 1898 | { |
486aa699 BS |
1899 | struct nfs_server *server; |
1900 | ||
d17540c6 JL |
1901 | if (mount_info->parsed->need_mount) |
1902 | server = nfs_try_mount_request(mount_info, nfs_mod); | |
1903 | else | |
1904 | server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); | |
486aa699 | 1905 | |
486aa699 BS |
1906 | if (IS_ERR(server)) |
1907 | return ERR_CAST(server); | |
1908 | ||
ab7017a3 | 1909 | return nfs_fs_mount_common(server, flags, dev_name, mount_info, nfs_mod); |
486aa699 | 1910 | } |
ddda8e0a | 1911 | EXPORT_SYMBOL_GPL(nfs_try_mount); |
486aa699 | 1912 | |
c12bacec RL |
1913 | /* |
1914 | * Split "dev_name" into "hostname:export_path". | |
1915 | * | |
1916 | * The leftmost colon demarks the split between the server's hostname | |
1917 | * and the export path. If the hostname starts with a left square | |
1918 | * bracket, then it may contain colons. | |
1919 | * | |
1920 | * Note: caller frees hostname and export path, even on error. | |
1921 | */ | |
1922 | static int nfs_parse_devname(const char *dev_name, | |
1923 | char **hostname, size_t maxnamlen, | |
1924 | char **export_path, size_t maxpathlen) | |
dc045898 CL |
1925 | { |
1926 | size_t len; | |
c12bacec | 1927 | char *end; |
dc045898 | 1928 | |
80ff0017 YL |
1929 | if (unlikely(!dev_name || !*dev_name)) { |
1930 | dfprintk(MOUNT, "NFS: device name not specified\n"); | |
1931 | return -EINVAL; | |
1932 | } | |
1933 | ||
c12bacec RL |
1934 | /* Is the host name protected with square brakcets? */ |
1935 | if (*dev_name == '[') { | |
1936 | end = strchr(++dev_name, ']'); | |
1937 | if (end == NULL || end[1] != ':') | |
dc045898 | 1938 | goto out_bad_devname; |
dc045898 | 1939 | |
c12bacec RL |
1940 | len = end - dev_name; |
1941 | end++; | |
1942 | } else { | |
1943 | char *comma; | |
dc045898 | 1944 | |
c12bacec RL |
1945 | end = strchr(dev_name, ':'); |
1946 | if (end == NULL) | |
1947 | goto out_bad_devname; | |
1948 | len = end - dev_name; | |
d1aa0825 | 1949 | |
c12bacec RL |
1950 | /* kill possible hostname list: not supported */ |
1951 | comma = strchr(dev_name, ','); | |
1952 | if (comma != NULL && comma < end) | |
40cc394b | 1953 | len = comma - dev_name; |
c12bacec | 1954 | } |
d1aa0825 | 1955 | |
d1aa0825 CL |
1956 | if (len > maxnamlen) |
1957 | goto out_hostname; | |
1958 | ||
1959 | /* N.B. caller will free nfs_server.hostname in all cases */ | |
c12bacec | 1960 | *hostname = kstrndup(dev_name, len, GFP_KERNEL); |
d1aa0825 CL |
1961 | if (*hostname == NULL) |
1962 | goto out_nomem; | |
c12bacec | 1963 | len = strlen(++end); |
d1aa0825 CL |
1964 | if (len > maxpathlen) |
1965 | goto out_path; | |
1966 | *export_path = kstrndup(end, len, GFP_KERNEL); | |
1967 | if (!*export_path) | |
1968 | goto out_nomem; | |
1969 | ||
c12bacec | 1970 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path); |
d1aa0825 CL |
1971 | return 0; |
1972 | ||
1973 | out_bad_devname: | |
1974 | dfprintk(MOUNT, "NFS: device name not in host:path format\n"); | |
1975 | return -EINVAL; | |
1976 | ||
1977 | out_nomem: | |
1978 | dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); | |
1979 | return -ENOMEM; | |
1980 | ||
1981 | out_hostname: | |
1982 | dfprintk(MOUNT, "NFS: server hostname too long\n"); | |
1983 | return -ENAMETOOLONG; | |
1984 | ||
1985 | out_path: | |
1986 | dfprintk(MOUNT, "NFS: export pathname too long\n"); | |
1987 | return -ENAMETOOLONG; | |
1988 | } | |
1989 | ||
f7b422b1 | 1990 | /* |
54ceac45 DH |
1991 | * Validate the NFS2/NFS3 mount data |
1992 | * - fills in the mount root filehandle | |
136d558c CL |
1993 | * |
1994 | * For option strings, user space handles the following behaviors: | |
1995 | * | |
1996 | * + DNS: mapping server host name to IP address ("addr=" option) | |
1997 | * | |
1998 | * + failure mode: how to behave if a mount request can't be handled | |
1999 | * immediately ("fg/bg" option) | |
2000 | * | |
2001 | * + retry: how often to retry a mount request ("retry=" option) | |
2002 | * | |
2003 | * + breaking back: trying proto=udp after proto=tcp, v2 after v3, | |
2004 | * mountproto=tcp after mountproto=udp, and so on | |
f7b422b1 | 2005 | */ |
d72c727c BS |
2006 | static int nfs23_validate_mount_data(void *options, |
2007 | struct nfs_parsed_mount_data *args, | |
2008 | struct nfs_fh *mntfh, | |
2009 | const char *dev_name) | |
f7b422b1 | 2010 | { |
2283f8d6 | 2011 | struct nfs_mount_data *data = (struct nfs_mount_data *)options; |
4cfd74fc | 2012 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; |
74c98811 | 2013 | int extra_flags = NFS_MOUNT_LEGACY_INTERFACE; |
136d558c | 2014 | |
5df36e78 CL |
2015 | if (data == NULL) |
2016 | goto out_no_data; | |
f7b422b1 | 2017 | |
c5afc8da | 2018 | args->version = NFS_DEFAULT_VERSION; |
54ceac45 | 2019 | switch (data->version) { |
5df36e78 | 2020 | case 1: |
fd53dde8 | 2021 | data->namlen = 0; /* fall through */ |
5df36e78 | 2022 | case 2: |
fd53dde8 | 2023 | data->bsize = 0; /* fall through */ |
5df36e78 CL |
2024 | case 3: |
2025 | if (data->flags & NFS_MOUNT_VER3) | |
2026 | goto out_no_v3; | |
2027 | data->root.size = NFS2_FHSIZE; | |
2028 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
74c98811 TM |
2029 | /* Turn off security negotiation */ |
2030 | extra_flags |= NFS_MOUNT_SECFLAVOUR; | |
fd53dde8 | 2031 | /* fall through */ |
5df36e78 CL |
2032 | case 4: |
2033 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
2034 | goto out_no_sec; | |
fd53dde8 | 2035 | /* fall through */ |
5df36e78 CL |
2036 | case 5: |
2037 | memset(data->context, 0, sizeof(data->context)); | |
fd53dde8 | 2038 | /* fall through */ |
5df36e78 | 2039 | case 6: |
b7e24457 TM |
2040 | if (data->flags & NFS_MOUNT_VER3) { |
2041 | if (data->root.size > NFS3_FHSIZE || data->root.size == 0) | |
2042 | goto out_invalid_fh; | |
5df36e78 | 2043 | mntfh->size = data->root.size; |
764302cc CL |
2044 | args->version = 3; |
2045 | } else { | |
5df36e78 | 2046 | mntfh->size = NFS2_FHSIZE; |
764302cc CL |
2047 | args->version = 2; |
2048 | } | |
5df36e78 | 2049 | |
5df36e78 CL |
2050 | |
2051 | memcpy(mntfh->data, data->root.data, mntfh->size); | |
2052 | if (mntfh->size < sizeof(mntfh->data)) | |
2053 | memset(mntfh->data + mntfh->size, 0, | |
2054 | sizeof(mntfh->data) - mntfh->size); | |
6e88e061 | 2055 | |
2283f8d6 TT |
2056 | /* |
2057 | * Translate to nfs_parsed_mount_data, which nfs_fill_super | |
2058 | * can deal with. | |
2059 | */ | |
ff3525a5 | 2060 | args->flags = data->flags & NFS_MOUNT_FLAGMASK; |
74c98811 | 2061 | args->flags |= extra_flags; |
2283f8d6 TT |
2062 | args->rsize = data->rsize; |
2063 | args->wsize = data->wsize; | |
2283f8d6 TT |
2064 | args->timeo = data->timeo; |
2065 | args->retrans = data->retrans; | |
2066 | args->acregmin = data->acregmin; | |
2067 | args->acregmax = data->acregmax; | |
2068 | args->acdirmin = data->acdirmin; | |
2069 | args->acdirmax = data->acdirmax; | |
b72e4f42 | 2070 | args->need_mount = false; |
4c568017 | 2071 | |
4cfd74fc | 2072 | memcpy(sap, &data->addr, sizeof(data->addr)); |
4c568017 | 2073 | args->nfs_server.addrlen = sizeof(data->addr); |
872ece86 | 2074 | args->nfs_server.port = ntohs(data->addr.sin_port); |
7c2bd9a3 TH |
2075 | if (sap->sa_family != AF_INET || |
2076 | !nfs_verify_server_address(sap)) | |
4c568017 CL |
2077 | goto out_no_address; |
2078 | ||
2283f8d6 | 2079 | if (!(data->flags & NFS_MOUNT_TCP)) |
0896a725 | 2080 | args->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
2283f8d6 TT |
2081 | /* N.B. caller will free nfs_server.hostname in all cases */ |
2082 | args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); | |
2083 | args->namlen = data->namlen; | |
2084 | args->bsize = data->bsize; | |
dd07c947 CL |
2085 | |
2086 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
a3f73c27 | 2087 | args->selected_flavor = data->pseudoflavor; |
74c98811 | 2088 | else |
a3f73c27 | 2089 | args->selected_flavor = RPC_AUTH_UNIX; |
63649bd7 CG |
2090 | if (!args->nfs_server.hostname) |
2091 | goto out_nomem; | |
f9c3a380 | 2092 | |
5eebde23 SJ |
2093 | if (!(data->flags & NFS_MOUNT_NONLM)) |
2094 | args->flags &= ~(NFS_MOUNT_LOCAL_FLOCK| | |
2095 | NFS_MOUNT_LOCAL_FCNTL); | |
2096 | else | |
2097 | args->flags |= (NFS_MOUNT_LOCAL_FLOCK| | |
2098 | NFS_MOUNT_LOCAL_FCNTL); | |
f9c3a380 EP |
2099 | /* |
2100 | * The legacy version 6 binary mount data from userspace has a | |
2101 | * field used only to transport selinux information into the | |
2102 | * the kernel. To continue to support that functionality we | |
2103 | * have a touch of selinux knowledge here in the NFS code. The | |
2104 | * userspace code converted context=blah to just blah so we are | |
2105 | * converting back to the full string selinux understands. | |
2106 | */ | |
2107 | if (data->context[0]){ | |
2108 | #ifdef CONFIG_SECURITY_SELINUX | |
2109 | int rc; | |
f9c3a380 | 2110 | data->context[NFS_MAX_CONTEXT_LEN] = '\0'; |
757cbe59 AV |
2111 | rc = security_add_mnt_opt("context", data->context, |
2112 | strlen(data->context), &args->lsm_opts); | |
f9c3a380 EP |
2113 | if (rc) |
2114 | return rc; | |
2115 | #else | |
2116 | return -EINVAL; | |
2117 | #endif | |
2118 | } | |
2119 | ||
5df36e78 | 2120 | break; |
b72e4f42 BS |
2121 | default: |
2122 | return NFS_TEXT_DATA; | |
f7b422b1 | 2123 | } |
54ceac45 | 2124 | |
5df36e78 | 2125 | return 0; |
f7b422b1 | 2126 | |
5df36e78 CL |
2127 | out_no_data: |
2128 | dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); | |
2129 | return -EINVAL; | |
54ceac45 | 2130 | |
5df36e78 CL |
2131 | out_no_v3: |
2132 | dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", | |
2133 | data->version); | |
2134 | return -EINVAL; | |
f7b422b1 | 2135 | |
5df36e78 CL |
2136 | out_no_sec: |
2137 | dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); | |
2138 | return -EINVAL; | |
2139 | ||
63649bd7 CG |
2140 | out_nomem: |
2141 | dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); | |
2142 | return -ENOMEM; | |
2143 | ||
5df36e78 CL |
2144 | out_no_address: |
2145 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); | |
2146 | return -EINVAL; | |
2147 | ||
2148 | out_invalid_fh: | |
2149 | dfprintk(MOUNT, "NFS: invalid root filehandle\n"); | |
2150 | return -EINVAL; | |
f7b422b1 DH |
2151 | } |
2152 | ||
89d77c8f | 2153 | #if IS_ENABLED(CONFIG_NFS_V4) |
d72c727c BS |
2154 | static int nfs_validate_mount_data(struct file_system_type *fs_type, |
2155 | void *options, | |
2156 | struct nfs_parsed_mount_data *args, | |
2157 | struct nfs_fh *mntfh, | |
2158 | const char *dev_name) | |
2159 | { | |
2160 | if (fs_type == &nfs_fs_type) | |
2161 | return nfs23_validate_mount_data(options, args, mntfh, dev_name); | |
2162 | return nfs4_validate_mount_data(options, args, dev_name); | |
2163 | } | |
2164 | #else | |
2165 | static int nfs_validate_mount_data(struct file_system_type *fs_type, | |
2166 | void *options, | |
2167 | struct nfs_parsed_mount_data *args, | |
2168 | struct nfs_fh *mntfh, | |
2169 | const char *dev_name) | |
2170 | { | |
2171 | return nfs23_validate_mount_data(options, args, mntfh, dev_name); | |
2172 | } | |
2173 | #endif | |
2174 | ||
b72e4f42 BS |
2175 | static int nfs_validate_text_mount_data(void *options, |
2176 | struct nfs_parsed_mount_data *args, | |
2177 | const char *dev_name) | |
2178 | { | |
2179 | int port = 0; | |
2180 | int max_namelen = PAGE_SIZE; | |
2181 | int max_pathlen = NFS_MAXPATHLEN; | |
2182 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; | |
2183 | ||
2184 | if (nfs_parse_mount_options((char *)options, args) == 0) | |
2185 | return -EINVAL; | |
2186 | ||
2187 | if (!nfs_verify_server_address(sap)) | |
2188 | goto out_no_address; | |
2189 | ||
2190 | if (args->version == 4) { | |
89d77c8f | 2191 | #if IS_ENABLED(CONFIG_NFS_V4) |
0dfbb5f0 CL |
2192 | if (args->nfs_server.protocol == XPRT_TRANSPORT_RDMA) |
2193 | port = NFS_RDMA_PORT; | |
2194 | else | |
2195 | port = NFS_PORT; | |
b72e4f42 BS |
2196 | max_namelen = NFS4_MAXNAMLEN; |
2197 | max_pathlen = NFS4_MAXPATHLEN; | |
2198 | nfs_validate_transport_protocol(args); | |
6da1a034 TM |
2199 | if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) |
2200 | goto out_invalid_transport_udp; | |
b72e4f42 BS |
2201 | nfs4_validate_mount_flags(args); |
2202 | #else | |
2203 | goto out_v4_not_compiled; | |
2204 | #endif /* CONFIG_NFS_V4 */ | |
0dfbb5f0 | 2205 | } else { |
b72e4f42 | 2206 | nfs_set_mount_transport_protocol(args); |
0dfbb5f0 CL |
2207 | if (args->nfs_server.protocol == XPRT_TRANSPORT_RDMA) |
2208 | port = NFS_RDMA_PORT; | |
2209 | } | |
b72e4f42 BS |
2210 | |
2211 | nfs_set_port(sap, &args->nfs_server.port, port); | |
2212 | ||
b72e4f42 BS |
2213 | return nfs_parse_devname(dev_name, |
2214 | &args->nfs_server.hostname, | |
2215 | max_namelen, | |
2216 | &args->nfs_server.export_path, | |
2217 | max_pathlen); | |
2218 | ||
89d77c8f | 2219 | #if !IS_ENABLED(CONFIG_NFS_V4) |
b72e4f42 BS |
2220 | out_v4_not_compiled: |
2221 | dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); | |
2222 | return -EPROTONOSUPPORT; | |
6da1a034 TM |
2223 | #else |
2224 | out_invalid_transport_udp: | |
2225 | dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); | |
2226 | return -EINVAL; | |
b72e4f42 BS |
2227 | #endif /* !CONFIG_NFS_V4 */ |
2228 | ||
2229 | out_no_address: | |
2230 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); | |
2231 | return -EINVAL; | |
b72e4f42 BS |
2232 | } |
2233 | ||
71a6ec8a | 2234 | #define NFS_REMOUNT_CMP_FLAGMASK ~(NFS_MOUNT_INTR \ |
c8e47028 SM |
2235 | | NFS_MOUNT_SECURE \ |
2236 | | NFS_MOUNT_TCP \ | |
2237 | | NFS_MOUNT_VER3 \ | |
2238 | | NFS_MOUNT_KERBEROS \ | |
2239 | | NFS_MOUNT_NONLM \ | |
2240 | | NFS_MOUNT_BROKEN_SUID \ | |
2241 | | NFS_MOUNT_STRICTLOCK \ | |
c8e47028 SM |
2242 | | NFS_MOUNT_LEGACY_INTERFACE) |
2243 | ||
71a6ec8a SM |
2244 | #define NFS_MOUNT_CMP_FLAGMASK (NFS_REMOUNT_CMP_FLAGMASK & \ |
2245 | ~(NFS_MOUNT_UNSHARED | NFS_MOUNT_NORESVPORT)) | |
2246 | ||
48b605f8 JL |
2247 | static int |
2248 | nfs_compare_remount_data(struct nfs_server *nfss, | |
2249 | struct nfs_parsed_mount_data *data) | |
2250 | { | |
71a6ec8a | 2251 | if ((data->flags ^ nfss->flags) & NFS_REMOUNT_CMP_FLAGMASK || |
48b605f8 JL |
2252 | data->rsize != nfss->rsize || |
2253 | data->wsize != nfss->wsize || | |
57acc40d JL |
2254 | data->version != nfss->nfs_client->rpc_ops->version || |
2255 | data->minorversion != nfss->nfs_client->cl_minorversion || | |
48b605f8 | 2256 | data->retrans != nfss->client->cl_timeout->to_retries || |
09a330f4 | 2257 | !nfs_auth_info_match(&data->auth_info, nfss->client->cl_auth->au_flavor) || |
48b605f8 JL |
2258 | data->acregmin != nfss->acregmin / HZ || |
2259 | data->acregmax != nfss->acregmax / HZ || | |
2260 | data->acdirmin != nfss->acdirmin / HZ || | |
2261 | data->acdirmax != nfss->acdirmax / HZ || | |
2262 | data->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) || | |
dea1bb35 | 2263 | (data->options & NFS_OPTION_FSCACHE) != (nfss->options & NFS_OPTION_FSCACHE) || |
bcd2ea17 | 2264 | data->nfs_server.port != nfss->port || |
48b605f8 | 2265 | data->nfs_server.addrlen != nfss->nfs_client->cl_addrlen || |
a1be9eee SR |
2266 | !rpc_cmp_addr((struct sockaddr *)&data->nfs_server.address, |
2267 | (struct sockaddr *)&nfss->nfs_client->cl_addr)) | |
48b605f8 JL |
2268 | return -EINVAL; |
2269 | ||
2270 | return 0; | |
2271 | } | |
2272 | ||
fbdefd64 | 2273 | int |
48b605f8 JL |
2274 | nfs_remount(struct super_block *sb, int *flags, char *raw_data) |
2275 | { | |
2276 | int error; | |
2277 | struct nfs_server *nfss = sb->s_fs_info; | |
2278 | struct nfs_parsed_mount_data *data; | |
2279 | struct nfs_mount_data *options = (struct nfs_mount_data *)raw_data; | |
2280 | struct nfs4_mount_data *options4 = (struct nfs4_mount_data *)raw_data; | |
cd100725 | 2281 | u32 nfsvers = nfss->nfs_client->rpc_ops->version; |
48b605f8 | 2282 | |
02b9984d TT |
2283 | sync_filesystem(sb); |
2284 | ||
48b605f8 JL |
2285 | /* |
2286 | * Userspace mount programs that send binary options generally send | |
2287 | * them populated with default values. We have no way to know which | |
2288 | * ones were explicitly specified. Fall back to legacy behavior and | |
2289 | * just return success. | |
2290 | */ | |
31c94469 MZ |
2291 | if ((nfsvers == 4 && (!options4 || options4->version == 1)) || |
2292 | (nfsvers <= 3 && (!options || (options->version >= 1 && | |
2293 | options->version <= 6)))) | |
48b605f8 JL |
2294 | return 0; |
2295 | ||
6a0440e5 | 2296 | data = nfs_alloc_parsed_mount_data(); |
48b605f8 JL |
2297 | if (data == NULL) |
2298 | return -ENOMEM; | |
2299 | ||
2300 | /* fill out struct with values from existing mount */ | |
2301 | data->flags = nfss->flags; | |
2302 | data->rsize = nfss->rsize; | |
2303 | data->wsize = nfss->wsize; | |
2304 | data->retrans = nfss->client->cl_timeout->to_retries; | |
a3f73c27 | 2305 | data->selected_flavor = nfss->client->cl_auth->au_flavor; |
48b605f8 JL |
2306 | data->acregmin = nfss->acregmin / HZ; |
2307 | data->acregmax = nfss->acregmax / HZ; | |
2308 | data->acdirmin = nfss->acdirmin / HZ; | |
2309 | data->acdirmax = nfss->acdirmax / HZ; | |
2310 | data->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; | |
bcd2ea17 | 2311 | data->nfs_server.port = nfss->port; |
48b605f8 | 2312 | data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; |
57acc40d JL |
2313 | data->version = nfsvers; |
2314 | data->minorversion = nfss->nfs_client->cl_minorversion; | |
a914722f | 2315 | data->net = current->nsproxy->net_ns; |
48b605f8 JL |
2316 | memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr, |
2317 | data->nfs_server.addrlen); | |
2318 | ||
2319 | /* overwrite those values with any that were specified */ | |
1966903f JL |
2320 | error = -EINVAL; |
2321 | if (!nfs_parse_mount_options((char *)options, data)) | |
48b605f8 JL |
2322 | goto out; |
2323 | ||
26c4c170 JL |
2324 | /* |
2325 | * noac is a special case. It implies -o sync, but that's not | |
2326 | * necessarily reflected in the mtab options. do_remount_sb | |
1751e8a6 | 2327 | * will clear SB_SYNCHRONOUS if -o sync wasn't specified in the |
26c4c170 JL |
2328 | * remount options, so we have to explicitly reset it. |
2329 | */ | |
2330 | if (data->flags & NFS_MOUNT_NOAC) | |
1751e8a6 | 2331 | *flags |= SB_SYNCHRONOUS; |
26c4c170 | 2332 | |
48b605f8 JL |
2333 | /* compare new mount options with old ones */ |
2334 | error = nfs_compare_remount_data(nfss, data); | |
6a0440e5 | 2335 | if (!error) |
204cc0cc | 2336 | error = security_sb_remount(sb, data->lsm_opts); |
48b605f8 | 2337 | out: |
6a0440e5 | 2338 | nfs_free_parsed_mount_data(data); |
48b605f8 JL |
2339 | return error; |
2340 | } | |
89d77c8f | 2341 | EXPORT_SYMBOL_GPL(nfs_remount); |
48b605f8 | 2342 | |
f7b422b1 | 2343 | /* |
54ceac45 | 2344 | * Initialise the common bits of the superblock |
f7b422b1 | 2345 | */ |
4f253e1e | 2346 | static void nfs_initialise_sb(struct super_block *sb) |
f7b422b1 | 2347 | { |
54ceac45 | 2348 | struct nfs_server *server = NFS_SB(sb); |
5006a76c | 2349 | |
54ceac45 | 2350 | sb->s_magic = NFS_SUPER_MAGIC; |
f7b422b1 | 2351 | |
54ceac45 DH |
2352 | /* We probably want something more informative here */ |
2353 | snprintf(sb->s_id, sizeof(sb->s_id), | |
5a7c9eec | 2354 | "%u:%u", MAJOR(sb->s_dev), MINOR(sb->s_dev)); |
5006a76c | 2355 | |
54ceac45 DH |
2356 | if (sb->s_blocksize == 0) |
2357 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
2358 | &sb->s_blocksize_bits); | |
f7b422b1 | 2359 | |
54ceac45 | 2360 | nfs_super_set_maxbytes(sb, server->maxfilesize); |
f7b422b1 DH |
2361 | } |
2362 | ||
2363 | /* | |
54ceac45 | 2364 | * Finish setting up an NFS2/3 superblock |
f7b422b1 | 2365 | */ |
9052c7cf | 2366 | void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_info) |
f7b422b1 | 2367 | { |
c40f8d1d | 2368 | struct nfs_parsed_mount_data *data = mount_info->parsed; |
f7b422b1 | 2369 | struct nfs_server *server = NFS_SB(sb); |
5006a76c | 2370 | |
54ceac45 DH |
2371 | sb->s_blocksize_bits = 0; |
2372 | sb->s_blocksize = 0; | |
6a74490d BS |
2373 | sb->s_xattr = server->nfs_client->cl_nfs_mod->xattr; |
2374 | sb->s_op = server->nfs_client->cl_nfs_mod->sops; | |
2375 | if (data && data->bsize) | |
54ceac45 | 2376 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); |
f7b422b1 | 2377 | |
6a74490d | 2378 | if (server->nfs_client->rpc_ops->version != 2) { |
54ceac45 DH |
2379 | /* The VFS shouldn't apply the umask to mode bits. We will do |
2380 | * so ourselves when necessary. | |
2381 | */ | |
1751e8a6 | 2382 | sb->s_flags |= SB_POSIXACL; |
54ceac45 | 2383 | sb->s_time_gran = 1; |
20fa1902 | 2384 | sb->s_export_op = &nfs_export_ops; |
816724e6 | 2385 | } |
54ceac45 | 2386 | |
54ceac45 | 2387 | nfs_initialise_sb(sb); |
f7b422b1 | 2388 | } |
89d77c8f | 2389 | EXPORT_SYMBOL_GPL(nfs_fill_super); |
f7b422b1 DH |
2390 | |
2391 | /* | |
3cadf4b8 | 2392 | * Finish setting up a cloned NFS2/3/4 superblock |
f7b422b1 | 2393 | */ |
4f253e1e JK |
2394 | static void nfs_clone_super(struct super_block *sb, |
2395 | struct nfs_mount_info *mount_info) | |
f7b422b1 | 2396 | { |
8c958e0c | 2397 | const struct super_block *old_sb = mount_info->cloned->sb; |
54ceac45 DH |
2398 | struct nfs_server *server = NFS_SB(sb); |
2399 | ||
2400 | sb->s_blocksize_bits = old_sb->s_blocksize_bits; | |
2401 | sb->s_blocksize = old_sb->s_blocksize; | |
2402 | sb->s_maxbytes = old_sb->s_maxbytes; | |
3cadf4b8 BS |
2403 | sb->s_xattr = old_sb->s_xattr; |
2404 | sb->s_op = old_sb->s_op; | |
2405 | sb->s_time_gran = 1; | |
20fa1902 | 2406 | sb->s_export_op = old_sb->s_export_op; |
f7b422b1 | 2407 | |
3cadf4b8 | 2408 | if (server->nfs_client->rpc_ops->version != 2) { |
54ceac45 DH |
2409 | /* The VFS shouldn't apply the umask to mode bits. We will do |
2410 | * so ourselves when necessary. | |
f7b422b1 | 2411 | */ |
1751e8a6 | 2412 | sb->s_flags |= SB_POSIXACL; |
f7b422b1 DH |
2413 | } |
2414 | ||
54ceac45 | 2415 | nfs_initialise_sb(sb); |
f7b422b1 DH |
2416 | } |
2417 | ||
275a5d24 TM |
2418 | static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags) |
2419 | { | |
2420 | const struct nfs_server *a = s->s_fs_info; | |
2421 | const struct rpc_clnt *clnt_a = a->client; | |
2422 | const struct rpc_clnt *clnt_b = b->client; | |
2423 | ||
2424 | if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK)) | |
2425 | goto Ebusy; | |
2426 | if (a->nfs_client != b->nfs_client) | |
2427 | goto Ebusy; | |
0aea92bf | 2428 | if ((a->flags ^ b->flags) & NFS_MOUNT_CMP_FLAGMASK) |
275a5d24 TM |
2429 | goto Ebusy; |
2430 | if (a->wsize != b->wsize) | |
2431 | goto Ebusy; | |
2432 | if (a->rsize != b->rsize) | |
2433 | goto Ebusy; | |
2434 | if (a->acregmin != b->acregmin) | |
2435 | goto Ebusy; | |
2436 | if (a->acregmax != b->acregmax) | |
2437 | goto Ebusy; | |
2438 | if (a->acdirmin != b->acdirmin) | |
2439 | goto Ebusy; | |
2440 | if (a->acdirmax != b->acdirmax) | |
2441 | goto Ebusy; | |
594d1644 | 2442 | if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) |
275a5d24 | 2443 | goto Ebusy; |
e89a5a43 | 2444 | return 1; |
275a5d24 | 2445 | Ebusy: |
e89a5a43 TM |
2446 | return 0; |
2447 | } | |
2448 | ||
2449 | struct nfs_sb_mountdata { | |
2450 | struct nfs_server *server; | |
2451 | int mntflags; | |
2452 | }; | |
2453 | ||
2454 | static int nfs_set_super(struct super_block *s, void *data) | |
2455 | { | |
2456 | struct nfs_sb_mountdata *sb_mntdata = data; | |
2457 | struct nfs_server *server = sb_mntdata->server; | |
2458 | int ret; | |
2459 | ||
2460 | s->s_flags = sb_mntdata->mntflags; | |
2461 | s->s_fs_info = server; | |
8b244ff2 | 2462 | s->s_d_op = server->nfs_client->rpc_ops->dentry_ops; |
e89a5a43 TM |
2463 | ret = set_anon_super(s, server); |
2464 | if (ret == 0) | |
2465 | server->s_dev = s->s_dev; | |
2466 | return ret; | |
2467 | } | |
2468 | ||
fd00a8ff CL |
2469 | static int nfs_compare_super_address(struct nfs_server *server1, |
2470 | struct nfs_server *server2) | |
2471 | { | |
2472 | struct sockaddr *sap1, *sap2; | |
7e3fcf61 BF |
2473 | struct rpc_xprt *xprt1 = server1->client->cl_xprt; |
2474 | struct rpc_xprt *xprt2 = server2->client->cl_xprt; | |
2475 | ||
2476 | if (!net_eq(xprt1->xprt_net, xprt2->xprt_net)) | |
2477 | return 0; | |
fd00a8ff CL |
2478 | |
2479 | sap1 = (struct sockaddr *)&server1->nfs_client->cl_addr; | |
2480 | sap2 = (struct sockaddr *)&server2->nfs_client->cl_addr; | |
2481 | ||
2482 | if (sap1->sa_family != sap2->sa_family) | |
2483 | return 0; | |
2484 | ||
2485 | switch (sap1->sa_family) { | |
2486 | case AF_INET: { | |
2487 | struct sockaddr_in *sin1 = (struct sockaddr_in *)sap1; | |
2488 | struct sockaddr_in *sin2 = (struct sockaddr_in *)sap2; | |
2489 | if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) | |
2490 | return 0; | |
2491 | if (sin1->sin_port != sin2->sin_port) | |
2492 | return 0; | |
2493 | break; | |
2494 | } | |
2495 | case AF_INET6: { | |
2496 | struct sockaddr_in6 *sin1 = (struct sockaddr_in6 *)sap1; | |
2497 | struct sockaddr_in6 *sin2 = (struct sockaddr_in6 *)sap2; | |
2498 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) | |
2499 | return 0; | |
2500 | if (sin1->sin6_port != sin2->sin6_port) | |
2501 | return 0; | |
2502 | break; | |
2503 | } | |
2504 | default: | |
2505 | return 0; | |
2506 | } | |
2507 | ||
2508 | return 1; | |
2509 | } | |
2510 | ||
3b7eb5e3 TM |
2511 | static int nfs_compare_userns(const struct nfs_server *old, |
2512 | const struct nfs_server *new) | |
2513 | { | |
2514 | const struct user_namespace *oldns = &init_user_ns; | |
2515 | const struct user_namespace *newns = &init_user_ns; | |
2516 | ||
2517 | if (old->client && old->client->cl_cred) | |
2518 | oldns = old->client->cl_cred->user_ns; | |
2519 | if (new->client && new->client->cl_cred) | |
2520 | newns = new->client->cl_cred->user_ns; | |
2521 | if (oldns != newns) | |
2522 | return 0; | |
2523 | return 1; | |
2524 | } | |
2525 | ||
e89a5a43 TM |
2526 | static int nfs_compare_super(struct super_block *sb, void *data) |
2527 | { | |
2528 | struct nfs_sb_mountdata *sb_mntdata = data; | |
2529 | struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb); | |
2530 | int mntflags = sb_mntdata->mntflags; | |
2531 | ||
fd00a8ff | 2532 | if (!nfs_compare_super_address(old, server)) |
e89a5a43 TM |
2533 | return 0; |
2534 | /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */ | |
2535 | if (old->flags & NFS_MOUNT_UNSHARED) | |
2536 | return 0; | |
2537 | if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0) | |
2538 | return 0; | |
3b7eb5e3 TM |
2539 | if (!nfs_compare_userns(old, server)) |
2540 | return 0; | |
e89a5a43 | 2541 | return nfs_compare_mount_options(sb, server, mntflags); |
275a5d24 TM |
2542 | } |
2543 | ||
39ffb921 | 2544 | #ifdef CONFIG_NFS_FSCACHE |
2311b943 BS |
2545 | static void nfs_get_cache_cookie(struct super_block *sb, |
2546 | struct nfs_parsed_mount_data *parsed, | |
2547 | struct nfs_clone_mount *cloned) | |
2548 | { | |
c4271c6e | 2549 | struct nfs_server *nfss = NFS_SB(sb); |
2311b943 BS |
2550 | char *uniq = NULL; |
2551 | int ulen = 0; | |
2552 | ||
c4271c6e TM |
2553 | nfss->fscache_key = NULL; |
2554 | nfss->fscache = NULL; | |
2555 | ||
2556 | if (parsed) { | |
2557 | if (!(parsed->options & NFS_OPTION_FSCACHE)) | |
2558 | return; | |
2559 | if (parsed->fscache_uniq) { | |
2560 | uniq = parsed->fscache_uniq; | |
2561 | ulen = strlen(parsed->fscache_uniq); | |
2562 | } | |
2311b943 BS |
2563 | } else if (cloned) { |
2564 | struct nfs_server *mnt_s = NFS_SB(cloned->sb); | |
c4271c6e TM |
2565 | if (!(mnt_s->options & NFS_OPTION_FSCACHE)) |
2566 | return; | |
2311b943 BS |
2567 | if (mnt_s->fscache_key) { |
2568 | uniq = mnt_s->fscache_key->key.uniquifier; | |
2569 | ulen = mnt_s->fscache_key->key.uniq_len; | |
2570 | }; | |
c4271c6e TM |
2571 | } else |
2572 | return; | |
2311b943 BS |
2573 | |
2574 | nfs_fscache_get_super_cookie(sb, uniq, ulen); | |
2575 | } | |
39ffb921 TM |
2576 | #else |
2577 | static void nfs_get_cache_cookie(struct super_block *sb, | |
2578 | struct nfs_parsed_mount_data *parsed, | |
2579 | struct nfs_clone_mount *cloned) | |
2580 | { | |
2581 | } | |
2582 | #endif | |
2311b943 | 2583 | |
fbdefd64 BS |
2584 | int nfs_set_sb_security(struct super_block *s, struct dentry *mntroot, |
2585 | struct nfs_mount_info *mount_info) | |
3d176e3f | 2586 | { |
aa9c2669 DQ |
2587 | int error; |
2588 | unsigned long kflags = 0, kflags_out = 0; | |
2589 | if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL) | |
2590 | kflags |= SECURITY_LSM_NATIVE_LABELS; | |
2591 | ||
204cc0cc | 2592 | error = security_sb_set_mnt_opts(s, mount_info->parsed->lsm_opts, |
aa9c2669 DQ |
2593 | kflags, &kflags_out); |
2594 | if (error) | |
2595 | goto err; | |
2596 | ||
2597 | if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL && | |
2598 | !(kflags_out & SECURITY_LSM_NATIVE_LABELS)) | |
2599 | NFS_SB(s)->caps &= ~NFS_CAP_SECURITY_LABEL; | |
2600 | err: | |
2601 | return error; | |
3d176e3f | 2602 | } |
89d77c8f | 2603 | EXPORT_SYMBOL_GPL(nfs_set_sb_security); |
3d176e3f | 2604 | |
fbdefd64 BS |
2605 | int nfs_clone_sb_security(struct super_block *s, struct dentry *mntroot, |
2606 | struct nfs_mount_info *mount_info) | |
3d176e3f | 2607 | { |
0b4d3452 SM |
2608 | int error; |
2609 | unsigned long kflags = 0, kflags_out = 0; | |
2610 | ||
3d176e3f | 2611 | /* clone any lsm security options from the parent to the new sb */ |
2b0143b5 | 2612 | if (d_inode(mntroot)->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) |
3d176e3f | 2613 | return -ESTALE; |
0b4d3452 SM |
2614 | |
2615 | if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL) | |
2616 | kflags |= SECURITY_LSM_NATIVE_LABELS; | |
2617 | ||
2618 | error = security_sb_clone_mnt_opts(mount_info->cloned->sb, s, kflags, | |
2619 | &kflags_out); | |
2620 | if (error) | |
2621 | return error; | |
2622 | ||
2623 | if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL && | |
2624 | !(kflags_out & SECURITY_LSM_NATIVE_LABELS)) | |
2625 | NFS_SB(s)->caps &= ~NFS_CAP_SECURITY_LABEL; | |
2626 | return 0; | |
3d176e3f | 2627 | } |
89d77c8f | 2628 | EXPORT_SYMBOL_GPL(nfs_clone_sb_security); |
3d176e3f | 2629 | |
ab7017a3 | 2630 | struct dentry *nfs_fs_mount_common(struct nfs_server *server, |
fbdefd64 | 2631 | int flags, const char *dev_name, |
ab7017a3 BS |
2632 | struct nfs_mount_info *mount_info, |
2633 | struct nfs_subversion *nfs_mod) | |
f7b422b1 | 2634 | { |
f7b422b1 | 2635 | struct super_block *s; |
01194981 | 2636 | struct dentry *mntroot = ERR_PTR(-ENOMEM); |
75180df2 | 2637 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
e89a5a43 TM |
2638 | struct nfs_sb_mountdata sb_mntdata = { |
2639 | .mntflags = flags, | |
c40f8d1d | 2640 | .server = server, |
e89a5a43 | 2641 | }; |
01194981 | 2642 | int error; |
33852a1f | 2643 | |
75180df2 TM |
2644 | if (server->flags & NFS_MOUNT_UNSHARED) |
2645 | compare_super = NULL; | |
2646 | ||
fb2088cc SP |
2647 | /* -o noac implies -o sync */ |
2648 | if (server->flags & NFS_MOUNT_NOAC) | |
1751e8a6 | 2649 | sb_mntdata.mntflags |= SB_SYNCHRONOUS; |
fb2088cc | 2650 | |
e890db01 | 2651 | if (mount_info->cloned != NULL && mount_info->cloned->sb != NULL) |
1751e8a6 LT |
2652 | if (mount_info->cloned->sb->s_flags & SB_SYNCHRONOUS) |
2653 | sb_mntdata.mntflags |= SB_SYNCHRONOUS; | |
e890db01 | 2654 | |
54ceac45 | 2655 | /* Get a superblock - note that we may end up sharing one that already exists */ |
ab7017a3 | 2656 | s = sget(nfs_mod->nfs_fs, compare_super, nfs_set_super, flags, &sb_mntdata); |
816724e6 | 2657 | if (IS_ERR(s)) { |
01194981 | 2658 | mntroot = ERR_CAST(s); |
54ceac45 | 2659 | goto out_err_nosb; |
816724e6 TM |
2660 | } |
2661 | ||
54ceac45 DH |
2662 | if (s->s_fs_info != server) { |
2663 | nfs_free_server(server); | |
2664 | server = NULL; | |
fa799759 | 2665 | } else { |
9052c7cf JK |
2666 | error = super_setup_bdi_name(s, "%u:%u", MAJOR(server->s_dev), |
2667 | MINOR(server->s_dev)); | |
2668 | if (error) { | |
2669 | mntroot = ERR_PTR(error); | |
2670 | goto error_splat_super; | |
2671 | } | |
2672 | s->s_bdi->ra_pages = server->rpages * NFS_MAX_READAHEAD; | |
ce6cda18 | 2673 | server->super = s; |
54ceac45 | 2674 | } |
f7b422b1 | 2675 | |
54ceac45 DH |
2676 | if (!s->s_root) { |
2677 | /* initial superblock/root creation */ | |
9052c7cf | 2678 | mount_info->fill_super(s, mount_info); |
3d176e3f | 2679 | nfs_get_cache_cookie(s, mount_info->parsed, mount_info->cloned); |
95dd7758 EB |
2680 | if (!(server->flags & NFS_MOUNT_UNSHARED)) |
2681 | s->s_iflags |= SB_I_MULTIROOT; | |
54ceac45 | 2682 | } |
f7b422b1 | 2683 | |
87c7083d | 2684 | mntroot = nfs_get_root(s, mount_info->mntfh, dev_name); |
01194981 | 2685 | if (IS_ERR(mntroot)) |
54ceac45 | 2686 | goto error_splat_super; |
816724e6 | 2687 | |
3d176e3f | 2688 | error = mount_info->set_security(s, mntroot, mount_info); |
f9c3a380 EP |
2689 | if (error) |
2690 | goto error_splat_root; | |
2691 | ||
1751e8a6 | 2692 | s->s_flags |= SB_ACTIVE; |
0655960f CL |
2693 | |
2694 | out: | |
01194981 | 2695 | return mntroot; |
816724e6 | 2696 | |
54ceac45 DH |
2697 | out_err_nosb: |
2698 | nfs_free_server(server); | |
0655960f | 2699 | goto out; |
54ceac45 | 2700 | |
f9c3a380 EP |
2701 | error_splat_root: |
2702 | dput(mntroot); | |
01194981 | 2703 | mntroot = ERR_PTR(error); |
54ceac45 | 2704 | error_splat_super: |
6f5bbff9 | 2705 | deactivate_locked_super(s); |
0655960f | 2706 | goto out; |
f7b422b1 | 2707 | } |
89d77c8f | 2708 | EXPORT_SYMBOL_GPL(nfs_fs_mount_common); |
f7b422b1 | 2709 | |
fbdefd64 | 2710 | struct dentry *nfs_fs_mount(struct file_system_type *fs_type, |
c40f8d1d BS |
2711 | int flags, const char *dev_name, void *raw_data) |
2712 | { | |
c40f8d1d BS |
2713 | struct nfs_mount_info mount_info = { |
2714 | .fill_super = nfs_fill_super, | |
3d176e3f | 2715 | .set_security = nfs_set_sb_security, |
c40f8d1d | 2716 | }; |
c40f8d1d | 2717 | struct dentry *mntroot = ERR_PTR(-ENOMEM); |
ab7017a3 | 2718 | struct nfs_subversion *nfs_mod; |
c40f8d1d BS |
2719 | int error; |
2720 | ||
46058d46 | 2721 | mount_info.parsed = nfs_alloc_parsed_mount_data(); |
87c7083d BS |
2722 | mount_info.mntfh = nfs_alloc_fhandle(); |
2723 | if (mount_info.parsed == NULL || mount_info.mntfh == NULL) | |
c40f8d1d BS |
2724 | goto out; |
2725 | ||
2726 | /* Validate the mount data */ | |
87c7083d | 2727 | error = nfs_validate_mount_data(fs_type, raw_data, mount_info.parsed, mount_info.mntfh, dev_name); |
b72e4f42 | 2728 | if (error == NFS_TEXT_DATA) |
46058d46 | 2729 | error = nfs_validate_text_mount_data(raw_data, mount_info.parsed, dev_name); |
c40f8d1d BS |
2730 | if (error < 0) { |
2731 | mntroot = ERR_PTR(error); | |
2732 | goto out; | |
2733 | } | |
c40f8d1d | 2734 | |
ab7017a3 BS |
2735 | nfs_mod = get_nfs_version(mount_info.parsed->version); |
2736 | if (IS_ERR(nfs_mod)) { | |
2737 | mntroot = ERR_CAST(nfs_mod); | |
2738 | goto out; | |
2739 | } | |
2740 | ||
ff9099f2 | 2741 | mntroot = nfs_mod->rpc_ops->try_mount(flags, dev_name, &mount_info, nfs_mod); |
ab7017a3 BS |
2742 | |
2743 | put_nfs_version(nfs_mod); | |
c40f8d1d | 2744 | out: |
46058d46 | 2745 | nfs_free_parsed_mount_data(mount_info.parsed); |
87c7083d | 2746 | nfs_free_fhandle(mount_info.mntfh); |
c40f8d1d BS |
2747 | return mntroot; |
2748 | } | |
89d77c8f | 2749 | EXPORT_SYMBOL_GPL(nfs_fs_mount); |
c40f8d1d | 2750 | |
54ceac45 DH |
2751 | /* |
2752 | * Destroy an NFS2/3 superblock | |
2753 | */ | |
fbdefd64 | 2754 | void nfs_kill_super(struct super_block *s) |
f7b422b1 DH |
2755 | { |
2756 | struct nfs_server *server = NFS_SB(s); | |
7b14a213 CH |
2757 | dev_t dev = s->s_dev; |
2758 | ||
2759 | generic_shutdown_super(s); | |
f7b422b1 | 2760 | |
08734048 | 2761 | nfs_fscache_release_super_cookie(s); |
7b14a213 | 2762 | |
54ceac45 | 2763 | nfs_free_server(server); |
7b14a213 | 2764 | free_anon_bdev(dev); |
f7b422b1 | 2765 | } |
89d77c8f | 2766 | EXPORT_SYMBOL_GPL(nfs_kill_super); |
f7b422b1 | 2767 | |
54ceac45 | 2768 | /* |
8c958e0c | 2769 | * Clone an NFS2/3/4 server record on xdev traversal (FSID-change) |
54ceac45 | 2770 | */ |
3dd4f8ef | 2771 | static struct dentry * |
e8f25e6d BS |
2772 | nfs_xdev_mount(struct file_system_type *fs_type, int flags, |
2773 | const char *dev_name, void *raw_data) | |
f7b422b1 | 2774 | { |
e8f25e6d BS |
2775 | struct nfs_clone_mount *data = raw_data; |
2776 | struct nfs_mount_info mount_info = { | |
2777 | .fill_super = nfs_clone_super, | |
2778 | .set_security = nfs_clone_sb_security, | |
2779 | .cloned = data, | |
2780 | }; | |
54ceac45 | 2781 | struct nfs_server *server; |
3d176e3f | 2782 | struct dentry *mntroot = ERR_PTR(-ENOMEM); |
ab7017a3 | 2783 | struct nfs_subversion *nfs_mod = NFS_SB(data->sb)->nfs_client->cl_nfs_mod; |
f7b422b1 | 2784 | |
dee972b9 | 2785 | dprintk("--> nfs_xdev_mount()\n"); |
f7b422b1 | 2786 | |
e8f25e6d | 2787 | mount_info.mntfh = mount_info.cloned->fh; |
87c7083d | 2788 | |
54ceac45 | 2789 | /* create a new volume representation */ |
1179acc6 | 2790 | server = nfs_mod->rpc_ops->clone_server(NFS_SB(data->sb), data->fh, data->fattr, data->authflavor); |
f7b422b1 | 2791 | |
dee972b9 TM |
2792 | if (IS_ERR(server)) |
2793 | mntroot = ERR_CAST(server); | |
2794 | else | |
2795 | mntroot = nfs_fs_mount_common(server, flags, | |
2796 | dev_name, &mount_info, nfs_mod); | |
24c8dbbb | 2797 | |
dee972b9 TM |
2798 | dprintk("<-- nfs_xdev_mount() = %ld\n", |
2799 | IS_ERR(mntroot) ? PTR_ERR(mntroot) : 0L); | |
2800 | return mntroot; | |
f7b422b1 DH |
2801 | } |
2802 | ||
89d77c8f | 2803 | #if IS_ENABLED(CONFIG_NFS_V4) |
54ceac45 | 2804 | |
01c3f052 TM |
2805 | static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) |
2806 | { | |
5eebde23 SJ |
2807 | args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3| |
2808 | NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL); | |
01c3f052 TM |
2809 | } |
2810 | ||
f0768ebd CL |
2811 | /* |
2812 | * Validate NFSv4 mount options | |
2813 | */ | |
91ea40b9 TT |
2814 | static int nfs4_validate_mount_data(void *options, |
2815 | struct nfs_parsed_mount_data *args, | |
2816 | const char *dev_name) | |
f0768ebd | 2817 | { |
4cfd74fc | 2818 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; |
91ea40b9 | 2819 | struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; |
f0768ebd CL |
2820 | char *c; |
2821 | ||
2822 | if (data == NULL) | |
2823 | goto out_no_data; | |
2824 | ||
cdf66442 BS |
2825 | args->version = 4; |
2826 | ||
f0768ebd CL |
2827 | switch (data->version) { |
2828 | case 1: | |
4c568017 CL |
2829 | if (data->host_addrlen > sizeof(args->nfs_server.address)) |
2830 | goto out_no_address; | |
2831 | if (data->host_addrlen == 0) | |
f0768ebd | 2832 | goto out_no_address; |
4c568017 | 2833 | args->nfs_server.addrlen = data->host_addrlen; |
4cfd74fc | 2834 | if (copy_from_user(sap, data->host_addr, data->host_addrlen)) |
f0768ebd | 2835 | return -EFAULT; |
4cfd74fc | 2836 | if (!nfs_verify_server_address(sap)) |
f0768ebd | 2837 | goto out_no_address; |
872ece86 | 2838 | args->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port); |
f0768ebd | 2839 | |
6738b251 | 2840 | if (data->auth_flavourlen) { |
74c98811 | 2841 | rpc_authflavor_t pseudoflavor; |
6738b251 CL |
2842 | if (data->auth_flavourlen > 1) |
2843 | goto out_inval_auth; | |
74c98811 | 2844 | if (copy_from_user(&pseudoflavor, |
91ea40b9 | 2845 | data->auth_flavours, |
74c98811 | 2846 | sizeof(pseudoflavor))) |
f0768ebd | 2847 | return -EFAULT; |
a3f73c27 | 2848 | args->selected_flavor = pseudoflavor; |
74c98811 | 2849 | } else |
a3f73c27 | 2850 | args->selected_flavor = RPC_AUTH_UNIX; |
f0768ebd CL |
2851 | |
2852 | c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); | |
2853 | if (IS_ERR(c)) | |
2854 | return PTR_ERR(c); | |
91ea40b9 | 2855 | args->nfs_server.hostname = c; |
f0768ebd CL |
2856 | |
2857 | c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); | |
2858 | if (IS_ERR(c)) | |
2859 | return PTR_ERR(c); | |
91ea40b9 TT |
2860 | args->nfs_server.export_path = c; |
2861 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); | |
f0768ebd CL |
2862 | |
2863 | c = strndup_user(data->client_addr.data, 16); | |
2864 | if (IS_ERR(c)) | |
2865 | return PTR_ERR(c); | |
91ea40b9 TT |
2866 | args->client_address = c; |
2867 | ||
2868 | /* | |
2869 | * Translate to nfs_parsed_mount_data, which nfs4_fill_super | |
2870 | * can deal with. | |
2871 | */ | |
2872 | ||
2873 | args->flags = data->flags & NFS4_MOUNT_FLAGMASK; | |
2874 | args->rsize = data->rsize; | |
2875 | args->wsize = data->wsize; | |
2876 | args->timeo = data->timeo; | |
2877 | args->retrans = data->retrans; | |
2878 | args->acregmin = data->acregmin; | |
2879 | args->acregmax = data->acregmax; | |
2880 | args->acdirmin = data->acdirmin; | |
2881 | args->acdirmax = data->acdirmax; | |
2882 | args->nfs_server.protocol = data->proto; | |
259875ef | 2883 | nfs_validate_transport_protocol(args); |
6da1a034 TM |
2884 | if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) |
2885 | goto out_invalid_transport_udp; | |
f0768ebd CL |
2886 | |
2887 | break; | |
7630c852 | 2888 | default: |
b72e4f42 | 2889 | return NFS_TEXT_DATA; |
f0768ebd CL |
2890 | } |
2891 | ||
2892 | return 0; | |
2893 | ||
2894 | out_no_data: | |
2895 | dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); | |
2896 | return -EINVAL; | |
2897 | ||
2898 | out_inval_auth: | |
2899 | dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", | |
2900 | data->auth_flavourlen); | |
2901 | return -EINVAL; | |
2902 | ||
2903 | out_no_address: | |
2904 | dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); | |
2905 | return -EINVAL; | |
6da1a034 TM |
2906 | |
2907 | out_invalid_transport_udp: | |
2908 | dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); | |
2909 | return -EINVAL; | |
f0768ebd CL |
2910 | } |
2911 | ||
fac1e8e4 BS |
2912 | /* |
2913 | * NFS v4 module parameters need to stay in the | |
2914 | * NFS client for backwards compatibility | |
2915 | */ | |
2916 | unsigned int nfs_callback_set_tcpport; | |
5405fc44 | 2917 | unsigned short nfs_callback_nr_threads; |
fac1e8e4 BS |
2918 | /* Default cache timeout is 10 minutes */ |
2919 | unsigned int nfs_idmap_cache_timeout = 600; | |
2920 | /* Turn off NFSv4 uid/gid mapping when using AUTH_SYS */ | |
2921 | bool nfs4_disable_idmapping = true; | |
2922 | unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE; | |
5405fc44 | 2923 | unsigned short max_session_cb_slots = NFS4_DEF_CB_SLOT_TABLE_SIZE; |
fac1e8e4 | 2924 | unsigned short send_implementation_id = 1; |
6f2ea7f2 | 2925 | char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN] = ""; |
f6de7a39 | 2926 | bool recover_lost_locks = false; |
fac1e8e4 | 2927 | |
5405fc44 | 2928 | EXPORT_SYMBOL_GPL(nfs_callback_nr_threads); |
89d77c8f | 2929 | EXPORT_SYMBOL_GPL(nfs_callback_set_tcpport); |
89d77c8f BS |
2930 | EXPORT_SYMBOL_GPL(nfs_idmap_cache_timeout); |
2931 | EXPORT_SYMBOL_GPL(nfs4_disable_idmapping); | |
2932 | EXPORT_SYMBOL_GPL(max_session_slots); | |
5405fc44 | 2933 | EXPORT_SYMBOL_GPL(max_session_cb_slots); |
89d77c8f | 2934 | EXPORT_SYMBOL_GPL(send_implementation_id); |
6f2ea7f2 | 2935 | EXPORT_SYMBOL_GPL(nfs4_client_id_uniquifier); |
f6de7a39 | 2936 | EXPORT_SYMBOL_GPL(recover_lost_locks); |
89d77c8f | 2937 | |
fac1e8e4 BS |
2938 | #define NFS_CALLBACK_MAXPORTNR (65535U) |
2939 | ||
2940 | static int param_set_portnr(const char *val, const struct kernel_param *kp) | |
2941 | { | |
2942 | unsigned long num; | |
2943 | int ret; | |
2944 | ||
2945 | if (!val) | |
2946 | return -EINVAL; | |
7297cb68 | 2947 | ret = kstrtoul(val, 0, &num); |
379ebf07 | 2948 | if (ret || num > NFS_CALLBACK_MAXPORTNR) |
fac1e8e4 BS |
2949 | return -EINVAL; |
2950 | *((unsigned int *)kp->arg) = num; | |
2951 | return 0; | |
2952 | } | |
9c27847d | 2953 | static const struct kernel_param_ops param_ops_portnr = { |
fac1e8e4 BS |
2954 | .set = param_set_portnr, |
2955 | .get = param_get_uint, | |
2956 | }; | |
2957 | #define param_check_portnr(name, p) __param_check(name, p, unsigned int); | |
2958 | ||
2959 | module_param_named(callback_tcpport, nfs_callback_set_tcpport, portnr, 0644); | |
5405fc44 TM |
2960 | module_param_named(callback_nr_threads, nfs_callback_nr_threads, ushort, 0644); |
2961 | MODULE_PARM_DESC(callback_nr_threads, "Number of threads that will be " | |
2962 | "assigned to the NFSv4 callback channels."); | |
fac1e8e4 BS |
2963 | module_param(nfs_idmap_cache_timeout, int, 0644); |
2964 | module_param(nfs4_disable_idmapping, bool, 0644); | |
6f2ea7f2 CL |
2965 | module_param_string(nfs4_unique_id, nfs4_client_id_uniquifier, |
2966 | NFS4_CLIENT_ID_UNIQ_LEN, 0600); | |
fac1e8e4 BS |
2967 | MODULE_PARM_DESC(nfs4_disable_idmapping, |
2968 | "Turn off NFSv4 idmapping when using 'sec=sys'"); | |
2969 | module_param(max_session_slots, ushort, 0644); | |
2970 | MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 " | |
2971 | "requests the client will negotiate"); | |
5405fc44 | 2972 | module_param(max_session_cb_slots, ushort, 0644); |
f36ab161 | 2973 | MODULE_PARM_DESC(max_session_cb_slots, "Maximum number of parallel NFSv4.1 " |
5405fc44 | 2974 | "callbacks the client will process for a given server"); |
fac1e8e4 BS |
2975 | module_param(send_implementation_id, ushort, 0644); |
2976 | MODULE_PARM_DESC(send_implementation_id, | |
2977 | "Send implementation ID with NFSv4.1 exchange_id"); | |
6f2ea7f2 | 2978 | MODULE_PARM_DESC(nfs4_unique_id, "nfs_client_id4 uniquifier string"); |
425e776d | 2979 | |
f6de7a39 TM |
2980 | module_param(recover_lost_locks, bool, 0644); |
2981 | MODULE_PARM_DESC(recover_lost_locks, | |
2982 | "If the server reports that a lock might be lost, " | |
2983 | "try to recover it risking data corruption."); | |
2984 | ||
2985 | ||
54ceac45 | 2986 | #endif /* CONFIG_NFS_V4 */ |