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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 | |
bf0fd768 | 72 | |
6a74490d | 73 | const struct super_operations nfs_sops = { |
f7b422b1 | 74 | .alloc_inode = nfs_alloc_inode, |
ca1a199e | 75 | .free_inode = nfs_free_inode, |
f7b422b1 | 76 | .write_inode = nfs_write_inode, |
eed99357 | 77 | .drop_inode = nfs_drop_inode, |
f7b422b1 | 78 | .statfs = nfs_statfs, |
b57922d9 | 79 | .evict_inode = nfs_evict_inode, |
f7b422b1 DH |
80 | .umount_begin = nfs_umount_begin, |
81 | .show_options = nfs_show_options, | |
c7f404b4 AV |
82 | .show_devname = nfs_show_devname, |
83 | .show_path = nfs_show_path, | |
f7b422b1 DH |
84 | .show_stats = nfs_show_stats, |
85 | }; | |
ddda8e0a | 86 | EXPORT_SYMBOL_GPL(nfs_sops); |
f7b422b1 | 87 | |
89d77c8f | 88 | #if IS_ENABLED(CONFIG_NFS_V4) |
1ae811ee | 89 | static int __init register_nfs4_fs(void) |
90 | { | |
91 | return register_filesystem(&nfs4_fs_type); | |
92 | } | |
93 | ||
94 | static void unregister_nfs4_fs(void) | |
95 | { | |
96 | unregister_filesystem(&nfs4_fs_type); | |
97 | } | |
98 | #else | |
99 | static int __init register_nfs4_fs(void) | |
100 | { | |
101 | return 0; | |
102 | } | |
103 | ||
104 | static void unregister_nfs4_fs(void) | |
105 | { | |
106 | } | |
f7b422b1 DH |
107 | #endif |
108 | ||
8e1f936b | 109 | static struct shrinker acl_shrinker = { |
1ab6c499 DC |
110 | .count_objects = nfs_access_cache_count, |
111 | .scan_objects = nfs_access_cache_scan, | |
8e1f936b RR |
112 | .seeks = DEFAULT_SEEKS, |
113 | }; | |
979df72e | 114 | |
f7b422b1 DH |
115 | /* |
116 | * Register the NFS filesystems | |
117 | */ | |
118 | int __init register_nfs_fs(void) | |
119 | { | |
120 | int ret; | |
121 | ||
122 | ret = register_filesystem(&nfs_fs_type); | |
123 | if (ret < 0) | |
124 | goto error_0; | |
125 | ||
1ae811ee | 126 | ret = register_nfs4_fs(); |
f7b422b1 DH |
127 | if (ret < 0) |
128 | goto error_1; | |
1ae811ee | 129 | |
130 | ret = nfs_register_sysctl(); | |
131 | if (ret < 0) | |
132 | goto error_2; | |
5ef8d792 KM |
133 | ret = register_shrinker(&acl_shrinker); |
134 | if (ret < 0) | |
135 | goto error_3; | |
f7b422b1 | 136 | return 0; |
5ef8d792 KM |
137 | error_3: |
138 | nfs_unregister_sysctl(); | |
1ae811ee | 139 | error_2: |
140 | unregister_nfs4_fs(); | |
f7b422b1 DH |
141 | error_1: |
142 | unregister_filesystem(&nfs_fs_type); | |
f7b422b1 DH |
143 | error_0: |
144 | return ret; | |
145 | } | |
146 | ||
147 | /* | |
148 | * Unregister the NFS filesystems | |
149 | */ | |
150 | void __exit unregister_nfs_fs(void) | |
151 | { | |
8e1f936b | 152 | unregister_shrinker(&acl_shrinker); |
49af7ee1 | 153 | nfs_unregister_sysctl(); |
1ae811ee | 154 | unregister_nfs4_fs(); |
f7b422b1 DH |
155 | unregister_filesystem(&nfs_fs_type); |
156 | } | |
157 | ||
ea7c38fe | 158 | bool nfs_sb_active(struct super_block *sb) |
ef818a28 | 159 | { |
1daef0a8 | 160 | struct nfs_server *server = NFS_SB(sb); |
ef818a28 | 161 | |
ea7c38fe TM |
162 | if (!atomic_inc_not_zero(&sb->s_active)) |
163 | return false; | |
164 | if (atomic_inc_return(&server->active) != 1) | |
165 | atomic_dec(&sb->s_active); | |
166 | return true; | |
ef818a28 | 167 | } |
89d77c8f | 168 | EXPORT_SYMBOL_GPL(nfs_sb_active); |
ef818a28 | 169 | |
1daef0a8 | 170 | void nfs_sb_deactive(struct super_block *sb) |
ef818a28 SD |
171 | { |
172 | struct nfs_server *server = NFS_SB(sb); | |
1daef0a8 TM |
173 | |
174 | if (atomic_dec_and_test(&server->active)) | |
175 | deactivate_super(sb); | |
ef818a28 | 176 | } |
89d77c8f | 177 | EXPORT_SYMBOL_GPL(nfs_sb_deactive); |
ef818a28 | 178 | |
3c9e502b TM |
179 | static int __nfs_list_for_each_server(struct list_head *head, |
180 | int (*fn)(struct nfs_server *, void *), | |
181 | void *data) | |
182 | { | |
183 | struct nfs_server *server, *last = NULL; | |
184 | int ret = 0; | |
185 | ||
186 | rcu_read_lock(); | |
187 | list_for_each_entry_rcu(server, head, client_link) { | |
9c07b75b | 188 | if (!(server->super && nfs_sb_active(server->super))) |
3c9e502b TM |
189 | continue; |
190 | rcu_read_unlock(); | |
191 | if (last) | |
192 | nfs_sb_deactive(last->super); | |
193 | last = server; | |
194 | ret = fn(server, data); | |
195 | if (ret) | |
196 | goto out; | |
197 | rcu_read_lock(); | |
198 | } | |
199 | rcu_read_unlock(); | |
200 | out: | |
201 | if (last) | |
202 | nfs_sb_deactive(last->super); | |
203 | return ret; | |
204 | } | |
205 | ||
206 | int nfs_client_for_each_server(struct nfs_client *clp, | |
207 | int (*fn)(struct nfs_server *, void *), | |
208 | void *data) | |
209 | { | |
210 | return __nfs_list_for_each_server(&clp->cl_superblocks, fn, data); | |
211 | } | |
212 | EXPORT_SYMBOL_GPL(nfs_client_for_each_server); | |
213 | ||
f7b422b1 DH |
214 | /* |
215 | * Deliver file system statistics to userspace | |
216 | */ | |
fbdefd64 | 217 | int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
f7b422b1 | 218 | { |
0c7d90cf | 219 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
f7b422b1 DH |
220 | unsigned char blockbits; |
221 | unsigned long blockres; | |
2b0143b5 | 222 | struct nfs_fh *fh = NFS_FH(d_inode(dentry)); |
ca7e9a0d TM |
223 | struct nfs_fsstat res; |
224 | int error = -ENOMEM; | |
225 | ||
226 | res.fattr = nfs_alloc_fattr(); | |
227 | if (res.fattr == NULL) | |
228 | goto out_err; | |
f7b422b1 | 229 | |
8fa5c000 | 230 | error = server->nfs_client->rpc_ops->statfs(server, fh, &res); |
fbf3fdd2 MZ |
231 | if (unlikely(error == -ESTALE)) { |
232 | struct dentry *pd_dentry; | |
233 | ||
234 | pd_dentry = dget_parent(dentry); | |
1cfb7072 AV |
235 | nfs_zap_caches(d_inode(pd_dentry)); |
236 | dput(pd_dentry); | |
fbf3fdd2 | 237 | } |
ca7e9a0d | 238 | nfs_free_fattr(res.fattr); |
f7b422b1 DH |
239 | if (error < 0) |
240 | goto out_err; | |
ca7e9a0d | 241 | |
1a0ba9ae | 242 | buf->f_type = NFS_SUPER_MAGIC; |
f7b422b1 DH |
243 | |
244 | /* | |
245 | * Current versions of glibc do not correctly handle the | |
246 | * case where f_frsize != f_bsize. Eventually we want to | |
247 | * report the value of wtmult in this field. | |
248 | */ | |
0c7d90cf | 249 | buf->f_frsize = dentry->d_sb->s_blocksize; |
f7b422b1 DH |
250 | |
251 | /* | |
252 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
253 | * are reported in units of f_frsize. Linux hasn't had | |
254 | * an f_frsize field in its statfs struct until recently, | |
255 | * thus historically Linux's sys_statfs reports these | |
256 | * fields in units of f_bsize. | |
257 | */ | |
0c7d90cf DH |
258 | buf->f_bsize = dentry->d_sb->s_blocksize; |
259 | blockbits = dentry->d_sb->s_blocksize_bits; | |
f7b422b1 DH |
260 | blockres = (1 << blockbits) - 1; |
261 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
262 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
263 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
264 | ||
265 | buf->f_files = res.tfiles; | |
266 | buf->f_ffree = res.afiles; | |
267 | ||
268 | buf->f_namelen = server->namelen; | |
1a0ba9ae | 269 | |
f7b422b1 DH |
270 | return 0; |
271 | ||
272 | out_err: | |
3110ff80 | 273 | dprintk("%s: statfs error = %d\n", __func__, -error); |
1a0ba9ae | 274 | return error; |
f7b422b1 | 275 | } |
89d77c8f | 276 | EXPORT_SYMBOL_GPL(nfs_statfs); |
f7b422b1 | 277 | |
7d4e2747 DH |
278 | /* |
279 | * Map the security flavour number to a name | |
280 | */ | |
81039f1f TM |
281 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
282 | { | |
7d4e2747 | 283 | static const struct { |
81039f1f TM |
284 | rpc_authflavor_t flavour; |
285 | const char *str; | |
4d4b69dd WAA |
286 | } sec_flavours[NFS_AUTH_INFO_MAX_FLAVORS] = { |
287 | /* update NFS_AUTH_INFO_MAX_FLAVORS when this list changes! */ | |
81039f1f TM |
288 | { RPC_AUTH_NULL, "null" }, |
289 | { RPC_AUTH_UNIX, "sys" }, | |
290 | { RPC_AUTH_GSS_KRB5, "krb5" }, | |
291 | { RPC_AUTH_GSS_KRB5I, "krb5i" }, | |
292 | { RPC_AUTH_GSS_KRB5P, "krb5p" }, | |
293 | { RPC_AUTH_GSS_LKEY, "lkey" }, | |
294 | { RPC_AUTH_GSS_LKEYI, "lkeyi" }, | |
295 | { RPC_AUTH_GSS_LKEYP, "lkeyp" }, | |
296 | { RPC_AUTH_GSS_SPKM, "spkm" }, | |
297 | { RPC_AUTH_GSS_SPKMI, "spkmi" }, | |
298 | { RPC_AUTH_GSS_SPKMP, "spkmp" }, | |
4d81cd16 | 299 | { UINT_MAX, "unknown" } |
81039f1f TM |
300 | }; |
301 | int i; | |
302 | ||
4d81cd16 | 303 | for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) { |
81039f1f TM |
304 | if (sec_flavours[i].flavour == flavour) |
305 | break; | |
306 | } | |
307 | return sec_flavours[i].str; | |
308 | } | |
309 | ||
ee671b01 JL |
310 | static void nfs_show_mountd_netid(struct seq_file *m, struct nfs_server *nfss, |
311 | int showdefaults) | |
312 | { | |
313 | struct sockaddr *sap = (struct sockaddr *) &nfss->mountd_address; | |
6f6e3c09 | 314 | char *proto = NULL; |
ee671b01 | 315 | |
ee671b01 JL |
316 | switch (sap->sa_family) { |
317 | case AF_INET: | |
318 | switch (nfss->mountd_protocol) { | |
319 | case IPPROTO_UDP: | |
6f6e3c09 | 320 | proto = RPCBIND_NETID_UDP; |
ee671b01 JL |
321 | break; |
322 | case IPPROTO_TCP: | |
6f6e3c09 | 323 | proto = RPCBIND_NETID_TCP; |
ee671b01 | 324 | break; |
ee671b01 JL |
325 | } |
326 | break; | |
327 | case AF_INET6: | |
328 | switch (nfss->mountd_protocol) { | |
329 | case IPPROTO_UDP: | |
6f6e3c09 | 330 | proto = RPCBIND_NETID_UDP6; |
ee671b01 JL |
331 | break; |
332 | case IPPROTO_TCP: | |
6f6e3c09 | 333 | proto = RPCBIND_NETID_TCP6; |
ee671b01 | 334 | break; |
ee671b01 JL |
335 | } |
336 | break; | |
ee671b01 | 337 | } |
6f6e3c09 N |
338 | if (proto || showdefaults) |
339 | seq_printf(m, ",mountproto=%s", proto ?: "auto"); | |
ee671b01 JL |
340 | } |
341 | ||
82d101d5 CL |
342 | static void nfs_show_mountd_options(struct seq_file *m, struct nfs_server *nfss, |
343 | int showdefaults) | |
344 | { | |
345 | struct sockaddr *sap = (struct sockaddr *)&nfss->mountd_address; | |
346 | ||
d5eff1a3 BS |
347 | if (nfss->flags & NFS_MOUNT_LEGACY_INTERFACE) |
348 | return; | |
349 | ||
82d101d5 CL |
350 | switch (sap->sa_family) { |
351 | case AF_INET: { | |
352 | struct sockaddr_in *sin = (struct sockaddr_in *)sap; | |
be859405 | 353 | seq_printf(m, ",mountaddr=%pI4", &sin->sin_addr.s_addr); |
82d101d5 CL |
354 | break; |
355 | } | |
356 | case AF_INET6: { | |
357 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
d250e190 | 358 | seq_printf(m, ",mountaddr=%pI6c", &sin6->sin6_addr); |
82d101d5 CL |
359 | break; |
360 | } | |
361 | default: | |
362 | if (showdefaults) | |
1c316e39 | 363 | seq_puts(m, ",mountaddr=unspecified"); |
82d101d5 CL |
364 | } |
365 | ||
366 | if (nfss->mountd_version || showdefaults) | |
367 | seq_printf(m, ",mountvers=%u", nfss->mountd_version); | |
aa699473 SK |
368 | if ((nfss->mountd_port && |
369 | nfss->mountd_port != (unsigned short)NFS_UNSPEC_PORT) || | |
370 | showdefaults) | |
82d101d5 CL |
371 | seq_printf(m, ",mountport=%u", nfss->mountd_port); |
372 | ||
ee671b01 | 373 | nfs_show_mountd_netid(m, nfss, showdefaults); |
82d101d5 CL |
374 | } |
375 | ||
89d77c8f | 376 | #if IS_ENABLED(CONFIG_NFS_V4) |
0be8189f TM |
377 | static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss, |
378 | int showdefaults) | |
379 | { | |
380 | struct nfs_client *clp = nfss->nfs_client; | |
381 | ||
382 | seq_printf(m, ",clientaddr=%s", clp->cl_ipaddr); | |
0be8189f TM |
383 | } |
384 | #else | |
385 | static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss, | |
386 | int showdefaults) | |
387 | { | |
388 | } | |
389 | #endif | |
390 | ||
7bbceb6f TM |
391 | static void nfs_show_nfs_version(struct seq_file *m, |
392 | unsigned int version, | |
393 | unsigned int minorversion) | |
394 | { | |
395 | seq_printf(m, ",vers=%u", version); | |
396 | if (version == 4) | |
397 | seq_printf(m, ".%u", minorversion); | |
398 | } | |
399 | ||
f7b422b1 DH |
400 | /* |
401 | * Describe the mount options in force on this server representation | |
402 | */ | |
82d101d5 CL |
403 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, |
404 | int showdefaults) | |
f7b422b1 | 405 | { |
509de811 | 406 | static const struct proc_nfs_info { |
f7b422b1 | 407 | int flag; |
509de811 DH |
408 | const char *str; |
409 | const char *nostr; | |
f7b422b1 | 410 | } nfs_info[] = { |
91a575e1 TM |
411 | { NFS_MOUNT_SOFT, ",soft", "" }, |
412 | { NFS_MOUNT_SOFTERR, ",softerr", "" }, | |
c74dfe97 | 413 | { NFS_MOUNT_SOFTREVAL, ",softreval", "" }, |
82d101d5 | 414 | { NFS_MOUNT_POSIX, ",posix", "" }, |
f7b422b1 DH |
415 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
416 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
417 | { NFS_MOUNT_NONLM, ",nolock", "" }, | |
418 | { NFS_MOUNT_NOACL, ",noacl", "" }, | |
74dd34e6 | 419 | { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" }, |
d740351b CL |
420 | { NFS_MOUNT_UNSHARED, ",nosharecache", "" }, |
421 | { NFS_MOUNT_NORESVPORT, ",noresvport", "" }, | |
f7b422b1 DH |
422 | { 0, NULL, NULL } |
423 | }; | |
509de811 | 424 | const struct proc_nfs_info *nfs_infop; |
8fa5c000 | 425 | struct nfs_client *clp = nfss->nfs_client; |
82d101d5 | 426 | u32 version = clp->rpc_ops->version; |
7c563cc9 | 427 | int local_flock, local_fcntl; |
f7b422b1 | 428 | |
7bbceb6f | 429 | nfs_show_nfs_version(m, version, clp->cl_minorversion); |
2d767432 CL |
430 | seq_printf(m, ",rsize=%u", nfss->rsize); |
431 | seq_printf(m, ",wsize=%u", nfss->wsize); | |
82d101d5 CL |
432 | if (nfss->bsize != 0) |
433 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
434 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
0e0cab74 | 435 | if (nfss->acregmin != NFS_DEF_ACREGMIN*HZ || showdefaults) |
2d767432 | 436 | seq_printf(m, ",acregmin=%u", nfss->acregmin/HZ); |
0e0cab74 | 437 | if (nfss->acregmax != NFS_DEF_ACREGMAX*HZ || showdefaults) |
2d767432 | 438 | seq_printf(m, ",acregmax=%u", nfss->acregmax/HZ); |
0e0cab74 | 439 | if (nfss->acdirmin != NFS_DEF_ACDIRMIN*HZ || showdefaults) |
2d767432 | 440 | seq_printf(m, ",acdirmin=%u", nfss->acdirmin/HZ); |
0e0cab74 | 441 | if (nfss->acdirmax != NFS_DEF_ACDIRMAX*HZ || showdefaults) |
2d767432 | 442 | seq_printf(m, ",acdirmax=%u", nfss->acdirmax/HZ); |
91a575e1 TM |
443 | if (!(nfss->flags & (NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR))) |
444 | seq_puts(m, ",hard"); | |
f7b422b1 DH |
445 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { |
446 | if (nfss->flags & nfs_infop->flag) | |
447 | seq_puts(m, nfs_infop->str); | |
448 | else | |
449 | seq_puts(m, nfs_infop->nostr); | |
450 | } | |
2446ab60 | 451 | rcu_read_lock(); |
56928edd | 452 | seq_printf(m, ",proto=%s", |
ee671b01 | 453 | rpc_peeraddr2str(nfss->client, RPC_DISPLAY_NETID)); |
2446ab60 | 454 | rcu_read_unlock(); |
fd87c8b7 TM |
455 | if (clp->cl_nconnect > 0) |
456 | seq_printf(m, ",nconnect=%u", clp->cl_nconnect); | |
82d101d5 CL |
457 | if (version == 4) { |
458 | if (nfss->port != NFS_PORT) | |
459 | seq_printf(m, ",port=%u", nfss->port); | |
460 | } else | |
461 | if (nfss->port) | |
462 | seq_printf(m, ",port=%u", nfss->port); | |
463 | ||
33170233 TM |
464 | seq_printf(m, ",timeo=%lu", 10U * nfss->client->cl_timeout->to_initval / HZ); |
465 | seq_printf(m, ",retrans=%u", nfss->client->cl_timeout->to_retries); | |
81039f1f | 466 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
82d101d5 CL |
467 | |
468 | if (version != 4) | |
469 | nfs_show_mountd_options(m, nfss, showdefaults); | |
0be8189f TM |
470 | else |
471 | nfs_show_nfsv4_options(m, nfss, showdefaults); | |
82d101d5 | 472 | |
b797cac7 | 473 | if (nfss->options & NFS_OPTION_FSCACHE) |
1c316e39 | 474 | seq_puts(m, ",fsc"); |
9b00c643 | 475 | |
89652617 | 476 | if (nfss->options & NFS_OPTION_MIGRATION) |
1c316e39 | 477 | seq_puts(m, ",migration"); |
89652617 | 478 | |
9b00c643 PL |
479 | if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONEG) { |
480 | if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONE) | |
1c316e39 | 481 | seq_puts(m, ",lookupcache=none"); |
9b00c643 | 482 | else |
1c316e39 | 483 | seq_puts(m, ",lookupcache=pos"); |
9b00c643 | 484 | } |
7c563cc9 SJ |
485 | |
486 | local_flock = nfss->flags & NFS_MOUNT_LOCAL_FLOCK; | |
487 | local_fcntl = nfss->flags & NFS_MOUNT_LOCAL_FCNTL; | |
488 | ||
489 | if (!local_flock && !local_fcntl) | |
1c316e39 | 490 | seq_puts(m, ",local_lock=none"); |
7c563cc9 | 491 | else if (local_flock && local_fcntl) |
1c316e39 | 492 | seq_puts(m, ",local_lock=all"); |
7c563cc9 | 493 | else if (local_flock) |
1c316e39 | 494 | seq_puts(m, ",local_lock=flock"); |
7c563cc9 | 495 | else |
1c316e39 | 496 | seq_puts(m, ",local_lock=posix"); |
f7b422b1 DH |
497 | } |
498 | ||
499 | /* | |
500 | * Describe the mount options on this VFS mountpoint | |
501 | */ | |
fbdefd64 | 502 | int nfs_show_options(struct seq_file *m, struct dentry *root) |
f7b422b1 | 503 | { |
34c80b1d | 504 | struct nfs_server *nfss = NFS_SB(root->d_sb); |
f7b422b1 DH |
505 | |
506 | nfs_show_mount_options(m, nfss, 0); | |
507 | ||
2446ab60 | 508 | rcu_read_lock(); |
5d8515ca CL |
509 | seq_printf(m, ",addr=%s", |
510 | rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient, | |
511 | RPC_DISPLAY_ADDR)); | |
2446ab60 | 512 | rcu_read_unlock(); |
f7b422b1 DH |
513 | |
514 | return 0; | |
515 | } | |
89d77c8f | 516 | EXPORT_SYMBOL_GPL(nfs_show_options); |
45402c38 | 517 | |
89d77c8f | 518 | #if IS_ENABLED(CONFIG_NFS_V4) |
1a7441b2 DW |
519 | static void show_lease(struct seq_file *m, struct nfs_server *server) |
520 | { | |
521 | struct nfs_client *clp = server->nfs_client; | |
522 | unsigned long expire; | |
523 | ||
524 | seq_printf(m, ",lease_time=%ld", clp->cl_lease_time / HZ); | |
525 | expire = clp->cl_last_renewal + clp->cl_lease_time; | |
526 | seq_printf(m, ",lease_expired=%ld", | |
527 | time_after(expire, jiffies) ? 0 : (jiffies - expire) / HZ); | |
528 | } | |
ae50c0b5 | 529 | #ifdef CONFIG_NFS_V4_1 |
45402c38 | 530 | static void show_sessions(struct seq_file *m, struct nfs_server *server) |
ae50c0b5 BF |
531 | { |
532 | if (nfs4_has_session(server->nfs_client)) | |
1c316e39 | 533 | seq_puts(m, ",sessions"); |
ae50c0b5 BF |
534 | } |
535 | #else | |
45402c38 HS |
536 | static void show_sessions(struct seq_file *m, struct nfs_server *server) {} |
537 | #endif | |
ae50c0b5 BF |
538 | #endif |
539 | ||
540 | #ifdef CONFIG_NFS_V4_1 | |
45402c38 | 541 | static void show_pnfs(struct seq_file *m, struct nfs_server *server) |
ae50c0b5 BF |
542 | { |
543 | seq_printf(m, ",pnfs="); | |
544 | if (server->pnfs_curr_ld) | |
545 | seq_printf(m, "%s", server->pnfs_curr_ld->name); | |
546 | else | |
547 | seq_printf(m, "not configured"); | |
548 | } | |
7e03b7cc TM |
549 | |
550 | static void show_implementation_id(struct seq_file *m, struct nfs_server *nfss) | |
551 | { | |
59155546 CL |
552 | if (nfss->nfs_client && nfss->nfs_client->cl_implid) { |
553 | struct nfs41_impl_id *impl_id = nfss->nfs_client->cl_implid; | |
7e03b7cc TM |
554 | seq_printf(m, "\n\timpl_id:\tname='%s',domain='%s'," |
555 | "date='%llu,%u'", | |
556 | impl_id->name, impl_id->domain, | |
557 | impl_id->date.seconds, impl_id->date.nseconds); | |
558 | } | |
559 | } | |
45402c38 | 560 | #else |
89d77c8f | 561 | #if IS_ENABLED(CONFIG_NFS_V4) |
7e03b7cc TM |
562 | static void show_pnfs(struct seq_file *m, struct nfs_server *server) |
563 | { | |
564 | } | |
45402c38 | 565 | #endif |
7e03b7cc TM |
566 | static void show_implementation_id(struct seq_file *m, struct nfs_server *nfss) |
567 | { | |
568 | } | |
45402c38 | 569 | #endif |
f7b422b1 | 570 | |
fbdefd64 | 571 | int nfs_show_devname(struct seq_file *m, struct dentry *root) |
c7f404b4 AV |
572 | { |
573 | char *page = (char *) __get_free_page(GFP_KERNEL); | |
574 | char *devname, *dummy; | |
575 | int err = 0; | |
576 | if (!page) | |
577 | return -ENOMEM; | |
97a54868 | 578 | devname = nfs_path(&dummy, root, page, PAGE_SIZE, 0); |
c7f404b4 AV |
579 | if (IS_ERR(devname)) |
580 | err = PTR_ERR(devname); | |
581 | else | |
582 | seq_escape(m, devname, " \t\n\\"); | |
583 | free_page((unsigned long)page); | |
584 | return err; | |
585 | } | |
89d77c8f | 586 | EXPORT_SYMBOL_GPL(nfs_show_devname); |
c7f404b4 | 587 | |
fbdefd64 | 588 | int nfs_show_path(struct seq_file *m, struct dentry *dentry) |
c7f404b4 AV |
589 | { |
590 | seq_puts(m, "/"); | |
591 | return 0; | |
592 | } | |
89d77c8f | 593 | EXPORT_SYMBOL_GPL(nfs_show_path); |
c7f404b4 | 594 | |
f7b422b1 DH |
595 | /* |
596 | * Present statistical information for this VFS mountpoint | |
597 | */ | |
fbdefd64 | 598 | int nfs_show_stats(struct seq_file *m, struct dentry *root) |
f7b422b1 DH |
599 | { |
600 | int i, cpu; | |
64132379 | 601 | struct nfs_server *nfss = NFS_SB(root->d_sb); |
f7b422b1 DH |
602 | struct rpc_auth *auth = nfss->client->cl_auth; |
603 | struct nfs_iostats totals = { }; | |
604 | ||
605 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
606 | ||
607 | /* | |
608 | * Display all mount option settings | |
609 | */ | |
1c316e39 | 610 | seq_puts(m, "\n\topts:\t"); |
bc98a42c | 611 | seq_puts(m, sb_rdonly(root->d_sb) ? "ro" : "rw"); |
1751e8a6 LT |
612 | seq_puts(m, root->d_sb->s_flags & SB_SYNCHRONOUS ? ",sync" : ""); |
613 | seq_puts(m, root->d_sb->s_flags & SB_NOATIME ? ",noatime" : ""); | |
614 | seq_puts(m, root->d_sb->s_flags & SB_NODIRATIME ? ",nodiratime" : ""); | |
f7b422b1 DH |
615 | nfs_show_mount_options(m, nfss, 1); |
616 | ||
617 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); | |
618 | ||
7e03b7cc | 619 | show_implementation_id(m, nfss); |
7d2ed9ac | 620 | |
1c316e39 | 621 | seq_puts(m, "\n\tcaps:\t"); |
f7b422b1 | 622 | seq_printf(m, "caps=0x%x", nfss->caps); |
2d767432 CL |
623 | seq_printf(m, ",wtmult=%u", nfss->wtmult); |
624 | seq_printf(m, ",dtsize=%u", nfss->dtsize); | |
625 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
626 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
f7b422b1 | 627 | |
89d77c8f | 628 | #if IS_ENABLED(CONFIG_NFS_V4) |
40c55319 | 629 | if (nfss->nfs_client->rpc_ops->version == 4) { |
1c316e39 | 630 | seq_puts(m, "\n\tnfsv4:\t"); |
f7b422b1 DH |
631 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); |
632 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
a09df2ca | 633 | seq_printf(m, ",bm2=0x%x", nfss->attr_bitmask[2]); |
f7b422b1 | 634 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); |
ae50c0b5 BF |
635 | show_sessions(m, nfss); |
636 | show_pnfs(m, nfss); | |
1a7441b2 | 637 | show_lease(m, nfss); |
f7b422b1 DH |
638 | } |
639 | #endif | |
640 | ||
641 | /* | |
642 | * Display security flavor in effect for this mount | |
643 | */ | |
2d767432 | 644 | seq_printf(m, "\n\tsec:\tflavor=%u", auth->au_ops->au_flavor); |
f7b422b1 | 645 | if (auth->au_flavor) |
2d767432 | 646 | seq_printf(m, ",pseudoflavor=%u", auth->au_flavor); |
f7b422b1 DH |
647 | |
648 | /* | |
649 | * Display superblock I/O counters | |
650 | */ | |
651 | for_each_possible_cpu(cpu) { | |
652 | struct nfs_iostats *stats; | |
653 | ||
654 | preempt_disable(); | |
655 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
656 | ||
657 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
658 | totals.events[i] += stats->events[i]; | |
659 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
660 | totals.bytes[i] += stats->bytes[i]; | |
6a51091d DH |
661 | #ifdef CONFIG_NFS_FSCACHE |
662 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
663 | totals.fscache[i] += stats->fscache[i]; | |
664 | #endif | |
f7b422b1 DH |
665 | |
666 | preempt_enable(); | |
667 | } | |
668 | ||
1c316e39 | 669 | seq_puts(m, "\n\tevents:\t"); |
f7b422b1 DH |
670 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) |
671 | seq_printf(m, "%lu ", totals.events[i]); | |
1c316e39 | 672 | seq_puts(m, "\n\tbytes:\t"); |
f7b422b1 DH |
673 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) |
674 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
6a51091d DH |
675 | #ifdef CONFIG_NFS_FSCACHE |
676 | if (nfss->options & NFS_OPTION_FSCACHE) { | |
1c316e39 | 677 | seq_puts(m, "\n\tfsc:\t"); |
6a51091d | 678 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) |
ce85bd29 | 679 | seq_printf(m, "%Lu ", totals.fscache[i]); |
6a51091d DH |
680 | } |
681 | #endif | |
9bcaa35c | 682 | seq_putc(m, '\n'); |
f7b422b1 | 683 | |
016583d7 | 684 | rpc_clnt_show_stats(m, nfss->client); |
f7b422b1 DH |
685 | |
686 | return 0; | |
687 | } | |
89d77c8f | 688 | EXPORT_SYMBOL_GPL(nfs_show_stats); |
f7b422b1 DH |
689 | |
690 | /* | |
691 | * Begin unmount by attempting to remove all automounted mountpoints we added | |
54ceac45 | 692 | * in response to xdev traversals and referrals |
f7b422b1 | 693 | */ |
fbdefd64 | 694 | void nfs_umount_begin(struct super_block *sb) |
f7b422b1 | 695 | { |
67e55205 | 696 | struct nfs_server *server; |
fc6ae3cf TM |
697 | struct rpc_clnt *rpc; |
698 | ||
67e55205 | 699 | server = NFS_SB(sb); |
fc6ae3cf TM |
700 | /* -EIO all pending I/O */ |
701 | rpc = server->client_acl; | |
702 | if (!IS_ERR(rpc)) | |
703 | rpc_killall_tasks(rpc); | |
704 | rpc = server->client; | |
705 | if (!IS_ERR(rpc)) | |
706 | rpc_killall_tasks(rpc); | |
f7b422b1 | 707 | } |
89d77c8f | 708 | EXPORT_SYMBOL_GPL(nfs_umount_begin); |
f7b422b1 | 709 | |
4d4b69dd WAA |
710 | /* |
711 | * Return true if 'match' is in auth_info or auth_info is empty. | |
712 | * Return false otherwise. | |
713 | */ | |
714 | bool nfs_auth_info_match(const struct nfs_auth_info *auth_info, | |
715 | rpc_authflavor_t match) | |
716 | { | |
717 | int i; | |
718 | ||
719 | if (!auth_info->flavor_len) | |
720 | return true; | |
721 | ||
722 | for (i = 0; i < auth_info->flavor_len; i++) { | |
723 | if (auth_info->flavors[i] == match) | |
724 | return true; | |
725 | } | |
726 | return false; | |
727 | } | |
728 | EXPORT_SYMBOL_GPL(nfs_auth_info_match); | |
729 | ||
ec88f28d | 730 | /* |
38465f5d SM |
731 | * Ensure that a specified authtype in ctx->auth_info is supported by |
732 | * the server. Returns 0 and sets ctx->selected_flavor if it's ok, and | |
4d4b69dd | 733 | * -EACCES if not. |
ec88f28d | 734 | */ |
38465f5d | 735 | static int nfs_verify_authflavors(struct nfs_fs_context *ctx, |
5eb005ca DH |
736 | rpc_authflavor_t *server_authlist, |
737 | unsigned int count) | |
ec88f28d | 738 | { |
4d4b69dd | 739 | rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; |
53a75f22 | 740 | bool found_auth_null = false; |
9111c95b | 741 | unsigned int i; |
4580a92d | 742 | |
d497ab97 WAA |
743 | /* |
744 | * If the sec= mount option is used, the specified flavor or AUTH_NULL | |
745 | * must be in the list returned by the server. | |
746 | * | |
747 | * AUTH_NULL has a special meaning when it's in the server list - it | |
748 | * means that the server will ignore the rpc creds, so any flavor | |
e68fd7c8 | 749 | * can be used but still use the sec= that was specified. |
53a75f22 CL |
750 | * |
751 | * Note also that the MNT procedure in MNTv1 does not return a list | |
752 | * of supported security flavors. In this case, nfs_mount() fabricates | |
753 | * a security flavor list containing just AUTH_NULL. | |
d497ab97 | 754 | */ |
4580a92d | 755 | for (i = 0; i < count; i++) { |
4d4b69dd WAA |
756 | flavor = server_authlist[i]; |
757 | ||
38465f5d | 758 | if (nfs_auth_info_match(&ctx->auth_info, flavor)) |
9111c95b | 759 | goto out; |
e68fd7c8 SD |
760 | |
761 | if (flavor == RPC_AUTH_NULL) | |
53a75f22 | 762 | found_auth_null = true; |
e68fd7c8 SD |
763 | } |
764 | ||
53a75f22 | 765 | if (found_auth_null) { |
38465f5d | 766 | flavor = ctx->auth_info.flavors[0]; |
e68fd7c8 | 767 | goto out; |
4580a92d | 768 | } |
ec88f28d | 769 | |
4d4b69dd WAA |
770 | dfprintk(MOUNT, |
771 | "NFS: specified auth flavors not supported by server\n"); | |
9111c95b | 772 | return -EACCES; |
d497ab97 | 773 | |
4580a92d | 774 | out: |
38465f5d SM |
775 | ctx->selected_flavor = flavor; |
776 | dfprintk(MOUNT, "NFS: using auth flavor %u\n", ctx->selected_flavor); | |
d497ab97 | 777 | return 0; |
ec88f28d CL |
778 | } |
779 | ||
0076d7b7 CL |
780 | /* |
781 | * Use the remote server's MOUNT service to request the NFS file handle | |
782 | * corresponding to the provided path. | |
783 | */ | |
62a55d08 | 784 | static int nfs_request_mount(struct fs_context *fc, |
294ae81d JL |
785 | struct nfs_fh *root_fh, |
786 | rpc_authflavor_t *server_authlist, | |
787 | unsigned int *server_authlist_len) | |
0076d7b7 | 788 | { |
62a55d08 | 789 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
c5d120f8 CL |
790 | struct nfs_mount_request request = { |
791 | .sap = (struct sockaddr *) | |
38465f5d SM |
792 | &ctx->mount_server.address, |
793 | .dirpath = ctx->nfs_server.export_path, | |
794 | .protocol = ctx->mount_server.protocol, | |
c5d120f8 | 795 | .fh = root_fh, |
38465f5d | 796 | .noresvport = ctx->flags & NFS_MOUNT_NORESVPORT, |
294ae81d | 797 | .auth_flav_len = server_authlist_len, |
ec88f28d | 798 | .auth_flavs = server_authlist, |
62a55d08 | 799 | .net = fc->net_ns, |
c5d120f8 | 800 | }; |
4c568017 | 801 | int status; |
0076d7b7 | 802 | |
38465f5d SM |
803 | if (ctx->mount_server.version == 0) { |
804 | switch (ctx->version) { | |
8a6e5deb | 805 | default: |
38465f5d | 806 | ctx->mount_server.version = NFS_MNT3_VERSION; |
8a6e5deb TM |
807 | break; |
808 | case 2: | |
38465f5d | 809 | ctx->mount_server.version = NFS_MNT_VERSION; |
8a6e5deb | 810 | } |
0076d7b7 | 811 | } |
38465f5d | 812 | request.version = ctx->mount_server.version; |
0076d7b7 | 813 | |
38465f5d SM |
814 | if (ctx->mount_server.hostname) |
815 | request.hostname = ctx->mount_server.hostname; | |
33832034 | 816 | else |
38465f5d | 817 | request.hostname = ctx->nfs_server.hostname; |
33832034 | 818 | |
0076d7b7 CL |
819 | /* |
820 | * Construct the mount server's address. | |
821 | */ | |
38465f5d SM |
822 | if (ctx->mount_server.address.sa_family == AF_UNSPEC) { |
823 | memcpy(request.sap, &ctx->nfs_server.address, | |
824 | ctx->nfs_server.addrlen); | |
825 | ctx->mount_server.addrlen = ctx->nfs_server.addrlen; | |
4c568017 | 826 | } |
38465f5d SM |
827 | request.salen = ctx->mount_server.addrlen; |
828 | nfs_set_port(request.sap, &ctx->mount_server.port, 0); | |
0076d7b7 CL |
829 | |
830 | /* | |
831 | * Now ask the mount server to map our export path | |
832 | * to a file handle. | |
833 | */ | |
c5d120f8 | 834 | status = nfs_mount(&request); |
ec88f28d CL |
835 | if (status != 0) { |
836 | dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n", | |
837 | request.hostname, status); | |
838 | return status; | |
839 | } | |
0076d7b7 | 840 | |
9111c95b | 841 | return 0; |
0076d7b7 CL |
842 | } |
843 | ||
62a55d08 | 844 | static struct nfs_server *nfs_try_mount_request(struct fs_context *fc) |
d17540c6 | 845 | { |
62a55d08 | 846 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
d17540c6 | 847 | int status; |
9111c95b JL |
848 | unsigned int i; |
849 | bool tried_auth_unix = false; | |
850 | bool auth_null_in_list = false; | |
851 | struct nfs_server *server = ERR_PTR(-EACCES); | |
294ae81d JL |
852 | rpc_authflavor_t authlist[NFS_MAX_SECFLAVORS]; |
853 | unsigned int authlist_len = ARRAY_SIZE(authlist); | |
d17540c6 | 854 | |
62a55d08 | 855 | status = nfs_request_mount(fc, ctx->mntfh, authlist, &authlist_len); |
d17540c6 JL |
856 | if (status) |
857 | return ERR_PTR(status); | |
858 | ||
9111c95b JL |
859 | /* |
860 | * Was a sec= authflavor specified in the options? First, verify | |
861 | * whether the server supports it, and then just try to use it if so. | |
862 | */ | |
5eb005ca DH |
863 | if (ctx->auth_info.flavor_len > 0) { |
864 | status = nfs_verify_authflavors(ctx, authlist, authlist_len); | |
a3f73c27 | 865 | dfprintk(MOUNT, "NFS: using auth flavor %u\n", |
5eb005ca | 866 | ctx->selected_flavor); |
9111c95b JL |
867 | if (status) |
868 | return ERR_PTR(status); | |
62a55d08 | 869 | return ctx->nfs_mod->rpc_ops->create_server(fc); |
9111c95b JL |
870 | } |
871 | ||
872 | /* | |
873 | * No sec= option was provided. RFC 2623, section 2.7 suggests we | |
874 | * SHOULD prefer the flavor listed first. However, some servers list | |
875 | * AUTH_NULL first. Avoid ever choosing AUTH_NULL. | |
876 | */ | |
877 | for (i = 0; i < authlist_len; ++i) { | |
878 | rpc_authflavor_t flavor; | |
879 | struct rpcsec_gss_info info; | |
880 | ||
881 | flavor = authlist[i]; | |
882 | switch (flavor) { | |
883 | case RPC_AUTH_UNIX: | |
884 | tried_auth_unix = true; | |
885 | break; | |
886 | case RPC_AUTH_NULL: | |
887 | auth_null_in_list = true; | |
888 | continue; | |
889 | default: | |
890 | if (rpcauth_get_gssinfo(flavor, &info) != 0) | |
891 | continue; | |
892 | /* Fallthrough */ | |
893 | } | |
894 | dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", flavor); | |
5eb005ca | 895 | ctx->selected_flavor = flavor; |
62a55d08 | 896 | server = ctx->nfs_mod->rpc_ops->create_server(fc); |
9111c95b JL |
897 | if (!IS_ERR(server)) |
898 | return server; | |
899 | } | |
900 | ||
901 | /* | |
902 | * Nothing we tried so far worked. At this point, give up if we've | |
903 | * already tried AUTH_UNIX or if the server's list doesn't contain | |
904 | * AUTH_NULL | |
905 | */ | |
906 | if (tried_auth_unix || !auth_null_in_list) | |
907 | return server; | |
908 | ||
909 | /* Last chance! Try AUTH_UNIX */ | |
910 | dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", RPC_AUTH_UNIX); | |
5eb005ca | 911 | ctx->selected_flavor = RPC_AUTH_UNIX; |
62a55d08 | 912 | return ctx->nfs_mod->rpc_ops->create_server(fc); |
d17540c6 JL |
913 | } |
914 | ||
f2aedb71 | 915 | int nfs_try_get_tree(struct fs_context *fc) |
486aa699 | 916 | { |
f2aedb71 DH |
917 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
918 | ||
919 | if (ctx->need_mount) | |
62a55d08 | 920 | ctx->server = nfs_try_mount_request(fc); |
d17540c6 | 921 | else |
62a55d08 | 922 | ctx->server = ctx->nfs_mod->rpc_ops->create_server(fc); |
486aa699 | 923 | |
f2aedb71 | 924 | return nfs_get_tree_common(fc); |
486aa699 | 925 | } |
f2aedb71 DH |
926 | EXPORT_SYMBOL_GPL(nfs_try_get_tree); |
927 | ||
486aa699 | 928 | |
71a6ec8a | 929 | #define NFS_REMOUNT_CMP_FLAGMASK ~(NFS_MOUNT_INTR \ |
c8e47028 SM |
930 | | NFS_MOUNT_SECURE \ |
931 | | NFS_MOUNT_TCP \ | |
932 | | NFS_MOUNT_VER3 \ | |
933 | | NFS_MOUNT_KERBEROS \ | |
934 | | NFS_MOUNT_NONLM \ | |
935 | | NFS_MOUNT_BROKEN_SUID \ | |
936 | | NFS_MOUNT_STRICTLOCK \ | |
c8e47028 SM |
937 | | NFS_MOUNT_LEGACY_INTERFACE) |
938 | ||
71a6ec8a SM |
939 | #define NFS_MOUNT_CMP_FLAGMASK (NFS_REMOUNT_CMP_FLAGMASK & \ |
940 | ~(NFS_MOUNT_UNSHARED | NFS_MOUNT_NORESVPORT)) | |
941 | ||
48b605f8 JL |
942 | static int |
943 | nfs_compare_remount_data(struct nfs_server *nfss, | |
5eb005ca | 944 | struct nfs_fs_context *ctx) |
48b605f8 | 945 | { |
5eb005ca DH |
946 | if ((ctx->flags ^ nfss->flags) & NFS_REMOUNT_CMP_FLAGMASK || |
947 | ctx->rsize != nfss->rsize || | |
948 | ctx->wsize != nfss->wsize || | |
949 | ctx->version != nfss->nfs_client->rpc_ops->version || | |
950 | ctx->minorversion != nfss->nfs_client->cl_minorversion || | |
951 | ctx->retrans != nfss->client->cl_timeout->to_retries || | |
952 | !nfs_auth_info_match(&ctx->auth_info, nfss->client->cl_auth->au_flavor) || | |
953 | ctx->acregmin != nfss->acregmin / HZ || | |
954 | ctx->acregmax != nfss->acregmax / HZ || | |
955 | ctx->acdirmin != nfss->acdirmin / HZ || | |
956 | ctx->acdirmax != nfss->acdirmax / HZ || | |
957 | ctx->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) || | |
958 | (ctx->options & NFS_OPTION_FSCACHE) != (nfss->options & NFS_OPTION_FSCACHE) || | |
959 | ctx->nfs_server.port != nfss->port || | |
960 | ctx->nfs_server.addrlen != nfss->nfs_client->cl_addrlen || | |
961 | !rpc_cmp_addr((struct sockaddr *)&ctx->nfs_server.address, | |
a1be9eee | 962 | (struct sockaddr *)&nfss->nfs_client->cl_addr)) |
48b605f8 JL |
963 | return -EINVAL; |
964 | ||
965 | return 0; | |
966 | } | |
967 | ||
f2aedb71 | 968 | int nfs_reconfigure(struct fs_context *fc) |
48b605f8 | 969 | { |
f2aedb71 DH |
970 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
971 | struct super_block *sb = fc->root->d_sb; | |
48b605f8 | 972 | struct nfs_server *nfss = sb->s_fs_info; |
48b605f8 | 973 | |
02b9984d TT |
974 | sync_filesystem(sb); |
975 | ||
48b605f8 JL |
976 | /* |
977 | * Userspace mount programs that send binary options generally send | |
978 | * them populated with default values. We have no way to know which | |
979 | * ones were explicitly specified. Fall back to legacy behavior and | |
980 | * just return success. | |
981 | */ | |
f2aedb71 | 982 | if (ctx->skip_reconfig_option_check) |
48b605f8 JL |
983 | return 0; |
984 | ||
26c4c170 JL |
985 | /* |
986 | * noac is a special case. It implies -o sync, but that's not | |
f2aedb71 | 987 | * necessarily reflected in the mtab options. reconfigure_super |
1751e8a6 | 988 | * will clear SB_SYNCHRONOUS if -o sync wasn't specified in the |
26c4c170 JL |
989 | * remount options, so we have to explicitly reset it. |
990 | */ | |
f2aedb71 DH |
991 | if (ctx->flags & NFS_MOUNT_NOAC) { |
992 | fc->sb_flags |= SB_SYNCHRONOUS; | |
993 | fc->sb_flags_mask |= SB_SYNCHRONOUS; | |
994 | } | |
26c4c170 | 995 | |
48b605f8 | 996 | /* compare new mount options with old ones */ |
f2aedb71 | 997 | return nfs_compare_remount_data(nfss, ctx); |
48b605f8 | 998 | } |
f2aedb71 | 999 | EXPORT_SYMBOL_GPL(nfs_reconfigure); |
48b605f8 | 1000 | |
f7b422b1 | 1001 | /* |
ab88dca3 | 1002 | * Finish setting up an NFS superblock |
f7b422b1 | 1003 | */ |
62a55d08 | 1004 | static void nfs_fill_super(struct super_block *sb, struct nfs_fs_context *ctx) |
f7b422b1 DH |
1005 | { |
1006 | struct nfs_server *server = NFS_SB(sb); | |
5006a76c | 1007 | |
54ceac45 DH |
1008 | sb->s_blocksize_bits = 0; |
1009 | sb->s_blocksize = 0; | |
6a74490d BS |
1010 | sb->s_xattr = server->nfs_client->cl_nfs_mod->xattr; |
1011 | sb->s_op = server->nfs_client->cl_nfs_mod->sops; | |
5eb005ca DH |
1012 | if (ctx && ctx->bsize) |
1013 | sb->s_blocksize = nfs_block_size(ctx->bsize, &sb->s_blocksize_bits); | |
f7b422b1 | 1014 | |
6a74490d | 1015 | if (server->nfs_client->rpc_ops->version != 2) { |
54ceac45 DH |
1016 | /* The VFS shouldn't apply the umask to mode bits. We will do |
1017 | * so ourselves when necessary. | |
1018 | */ | |
1751e8a6 | 1019 | sb->s_flags |= SB_POSIXACL; |
54ceac45 | 1020 | sb->s_time_gran = 1; |
20fa1902 | 1021 | sb->s_export_op = &nfs_export_ops; |
1fcb79c1 DD |
1022 | } else |
1023 | sb->s_time_gran = 1000; | |
1024 | ||
1025 | if (server->nfs_client->rpc_ops->version != 4) { | |
1026 | sb->s_time_min = 0; | |
1027 | sb->s_time_max = U32_MAX; | |
1028 | } else { | |
1029 | sb->s_time_min = S64_MIN; | |
1030 | sb->s_time_max = S64_MAX; | |
816724e6 | 1031 | } |
54ceac45 | 1032 | |
ab88dca3 | 1033 | sb->s_magic = NFS_SUPER_MAGIC; |
f7b422b1 | 1034 | |
ab88dca3 AV |
1035 | /* We probably want something more informative here */ |
1036 | snprintf(sb->s_id, sizeof(sb->s_id), | |
1037 | "%u:%u", MAJOR(sb->s_dev), MINOR(sb->s_dev)); | |
1fcb79c1 | 1038 | |
ab88dca3 AV |
1039 | if (sb->s_blocksize == 0) |
1040 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
1041 | &sb->s_blocksize_bits); | |
f7b422b1 | 1042 | |
ab88dca3 | 1043 | nfs_super_set_maxbytes(sb, server->maxfilesize); |
f7b422b1 DH |
1044 | } |
1045 | ||
62a55d08 SM |
1046 | static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, |
1047 | const struct fs_context *fc) | |
275a5d24 TM |
1048 | { |
1049 | const struct nfs_server *a = s->s_fs_info; | |
1050 | const struct rpc_clnt *clnt_a = a->client; | |
1051 | const struct rpc_clnt *clnt_b = b->client; | |
1052 | ||
62a55d08 | 1053 | if ((s->s_flags & NFS_SB_MASK) != (fc->sb_flags & NFS_SB_MASK)) |
275a5d24 TM |
1054 | goto Ebusy; |
1055 | if (a->nfs_client != b->nfs_client) | |
1056 | goto Ebusy; | |
0aea92bf | 1057 | if ((a->flags ^ b->flags) & NFS_MOUNT_CMP_FLAGMASK) |
275a5d24 TM |
1058 | goto Ebusy; |
1059 | if (a->wsize != b->wsize) | |
1060 | goto Ebusy; | |
1061 | if (a->rsize != b->rsize) | |
1062 | goto Ebusy; | |
1063 | if (a->acregmin != b->acregmin) | |
1064 | goto Ebusy; | |
1065 | if (a->acregmax != b->acregmax) | |
1066 | goto Ebusy; | |
1067 | if (a->acdirmin != b->acdirmin) | |
1068 | goto Ebusy; | |
1069 | if (a->acdirmax != b->acdirmax) | |
1070 | goto Ebusy; | |
594d1644 | 1071 | if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) |
275a5d24 | 1072 | goto Ebusy; |
e89a5a43 | 1073 | return 1; |
275a5d24 | 1074 | Ebusy: |
e89a5a43 TM |
1075 | return 0; |
1076 | } | |
1077 | ||
f2aedb71 | 1078 | static int nfs_set_super(struct super_block *s, struct fs_context *fc) |
e89a5a43 | 1079 | { |
f2aedb71 | 1080 | struct nfs_server *server = fc->s_fs_info; |
e89a5a43 TM |
1081 | int ret; |
1082 | ||
8b244ff2 | 1083 | s->s_d_op = server->nfs_client->rpc_ops->dentry_ops; |
e89a5a43 TM |
1084 | ret = set_anon_super(s, server); |
1085 | if (ret == 0) | |
1086 | server->s_dev = s->s_dev; | |
1087 | return ret; | |
1088 | } | |
1089 | ||
fd00a8ff CL |
1090 | static int nfs_compare_super_address(struct nfs_server *server1, |
1091 | struct nfs_server *server2) | |
1092 | { | |
1093 | struct sockaddr *sap1, *sap2; | |
7e3fcf61 BF |
1094 | struct rpc_xprt *xprt1 = server1->client->cl_xprt; |
1095 | struct rpc_xprt *xprt2 = server2->client->cl_xprt; | |
1096 | ||
1097 | if (!net_eq(xprt1->xprt_net, xprt2->xprt_net)) | |
1098 | return 0; | |
fd00a8ff CL |
1099 | |
1100 | sap1 = (struct sockaddr *)&server1->nfs_client->cl_addr; | |
1101 | sap2 = (struct sockaddr *)&server2->nfs_client->cl_addr; | |
1102 | ||
1103 | if (sap1->sa_family != sap2->sa_family) | |
1104 | return 0; | |
1105 | ||
1106 | switch (sap1->sa_family) { | |
1107 | case AF_INET: { | |
1108 | struct sockaddr_in *sin1 = (struct sockaddr_in *)sap1; | |
1109 | struct sockaddr_in *sin2 = (struct sockaddr_in *)sap2; | |
1110 | if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) | |
1111 | return 0; | |
1112 | if (sin1->sin_port != sin2->sin_port) | |
1113 | return 0; | |
1114 | break; | |
1115 | } | |
1116 | case AF_INET6: { | |
1117 | struct sockaddr_in6 *sin1 = (struct sockaddr_in6 *)sap1; | |
1118 | struct sockaddr_in6 *sin2 = (struct sockaddr_in6 *)sap2; | |
1119 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) | |
1120 | return 0; | |
1121 | if (sin1->sin6_port != sin2->sin6_port) | |
1122 | return 0; | |
1123 | break; | |
1124 | } | |
1125 | default: | |
1126 | return 0; | |
1127 | } | |
1128 | ||
1129 | return 1; | |
1130 | } | |
1131 | ||
3b7eb5e3 TM |
1132 | static int nfs_compare_userns(const struct nfs_server *old, |
1133 | const struct nfs_server *new) | |
1134 | { | |
1135 | const struct user_namespace *oldns = &init_user_ns; | |
1136 | const struct user_namespace *newns = &init_user_ns; | |
1137 | ||
1138 | if (old->client && old->client->cl_cred) | |
1139 | oldns = old->client->cl_cred->user_ns; | |
1140 | if (new->client && new->client->cl_cred) | |
1141 | newns = new->client->cl_cred->user_ns; | |
1142 | if (oldns != newns) | |
1143 | return 0; | |
1144 | return 1; | |
1145 | } | |
1146 | ||
f2aedb71 | 1147 | static int nfs_compare_super(struct super_block *sb, struct fs_context *fc) |
e89a5a43 | 1148 | { |
f2aedb71 | 1149 | struct nfs_server *server = fc->s_fs_info, *old = NFS_SB(sb); |
e89a5a43 | 1150 | |
fd00a8ff | 1151 | if (!nfs_compare_super_address(old, server)) |
e89a5a43 TM |
1152 | return 0; |
1153 | /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */ | |
1154 | if (old->flags & NFS_MOUNT_UNSHARED) | |
1155 | return 0; | |
1156 | if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0) | |
1157 | return 0; | |
3b7eb5e3 TM |
1158 | if (!nfs_compare_userns(old, server)) |
1159 | return 0; | |
62a55d08 | 1160 | return nfs_compare_mount_options(sb, server, fc); |
275a5d24 TM |
1161 | } |
1162 | ||
39ffb921 | 1163 | #ifdef CONFIG_NFS_FSCACHE |
2311b943 | 1164 | static void nfs_get_cache_cookie(struct super_block *sb, |
f2aedb71 | 1165 | struct nfs_fs_context *ctx) |
2311b943 | 1166 | { |
c4271c6e | 1167 | struct nfs_server *nfss = NFS_SB(sb); |
2311b943 BS |
1168 | char *uniq = NULL; |
1169 | int ulen = 0; | |
1170 | ||
c4271c6e TM |
1171 | nfss->fscache_key = NULL; |
1172 | nfss->fscache = NULL; | |
1173 | ||
f2aedb71 DH |
1174 | if (!ctx) |
1175 | return; | |
1176 | ||
1177 | if (ctx->clone_data.sb) { | |
1178 | struct nfs_server *mnt_s = NFS_SB(ctx->clone_data.sb); | |
c4271c6e TM |
1179 | if (!(mnt_s->options & NFS_OPTION_FSCACHE)) |
1180 | return; | |
2311b943 BS |
1181 | if (mnt_s->fscache_key) { |
1182 | uniq = mnt_s->fscache_key->key.uniquifier; | |
1183 | ulen = mnt_s->fscache_key->key.uniq_len; | |
9c91fa36 | 1184 | } |
f2aedb71 DH |
1185 | } else { |
1186 | if (!(ctx->options & NFS_OPTION_FSCACHE)) | |
1187 | return; | |
1188 | if (ctx->fscache_uniq) { | |
1189 | uniq = ctx->fscache_uniq; | |
1190 | ulen = strlen(ctx->fscache_uniq); | |
1191 | } | |
f2aedb71 | 1192 | } |
2311b943 BS |
1193 | |
1194 | nfs_fscache_get_super_cookie(sb, uniq, ulen); | |
1195 | } | |
39ffb921 TM |
1196 | #else |
1197 | static void nfs_get_cache_cookie(struct super_block *sb, | |
f2aedb71 | 1198 | struct nfs_fs_context *ctx) |
39ffb921 TM |
1199 | { |
1200 | } | |
1201 | #endif | |
2311b943 | 1202 | |
c128e575 TM |
1203 | static void nfs_set_readahead(struct backing_dev_info *bdi, |
1204 | unsigned long iomax_pages) | |
1205 | { | |
1206 | bdi->ra_pages = VM_READAHEAD_PAGES; | |
1207 | bdi->io_pages = iomax_pages; | |
1208 | } | |
1209 | ||
f2aedb71 | 1210 | int nfs_get_tree_common(struct fs_context *fc) |
f7b422b1 | 1211 | { |
f2aedb71 | 1212 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
f7b422b1 | 1213 | struct super_block *s; |
f2aedb71 | 1214 | int (*compare_super)(struct super_block *, struct fs_context *) = nfs_compare_super; |
62a55d08 | 1215 | struct nfs_server *server = ctx->server; |
01194981 | 1216 | int error; |
33852a1f | 1217 | |
62a55d08 | 1218 | ctx->server = NULL; |
444a5296 | 1219 | if (IS_ERR(server)) |
f2aedb71 | 1220 | return PTR_ERR(server); |
444a5296 | 1221 | |
75180df2 TM |
1222 | if (server->flags & NFS_MOUNT_UNSHARED) |
1223 | compare_super = NULL; | |
1224 | ||
fb2088cc SP |
1225 | /* -o noac implies -o sync */ |
1226 | if (server->flags & NFS_MOUNT_NOAC) | |
f2aedb71 DH |
1227 | fc->sb_flags |= SB_SYNCHRONOUS; |
1228 | ||
1229 | if (ctx->clone_data.sb) | |
1230 | if (ctx->clone_data.sb->s_flags & SB_SYNCHRONOUS) | |
1231 | fc->sb_flags |= SB_SYNCHRONOUS; | |
fb2088cc | 1232 | |
f2aedb71 DH |
1233 | if (server->caps & NFS_CAP_SECURITY_LABEL) |
1234 | fc->lsm_flags |= SECURITY_LSM_NATIVE_LABELS; | |
e890db01 | 1235 | |
54ceac45 | 1236 | /* Get a superblock - note that we may end up sharing one that already exists */ |
f2aedb71 DH |
1237 | fc->s_fs_info = server; |
1238 | s = sget_fc(fc, compare_super, nfs_set_super); | |
1239 | fc->s_fs_info = NULL; | |
816724e6 | 1240 | if (IS_ERR(s)) { |
f2aedb71 | 1241 | error = PTR_ERR(s); |
ce8866f0 | 1242 | nfs_errorf(fc, "NFS: Couldn't get superblock"); |
54ceac45 | 1243 | goto out_err_nosb; |
816724e6 TM |
1244 | } |
1245 | ||
54ceac45 DH |
1246 | if (s->s_fs_info != server) { |
1247 | nfs_free_server(server); | |
1248 | server = NULL; | |
fa799759 | 1249 | } else { |
9052c7cf JK |
1250 | error = super_setup_bdi_name(s, "%u:%u", MAJOR(server->s_dev), |
1251 | MINOR(server->s_dev)); | |
f2aedb71 | 1252 | if (error) |
9052c7cf | 1253 | goto error_splat_super; |
c128e575 | 1254 | nfs_set_readahead(s->s_bdi, server->rpages); |
ce6cda18 | 1255 | server->super = s; |
54ceac45 | 1256 | } |
f7b422b1 | 1257 | |
54ceac45 | 1258 | if (!s->s_root) { |
62a55d08 | 1259 | unsigned bsize = ctx->clone_data.inherited_bsize; |
54ceac45 | 1260 | /* initial superblock/root creation */ |
62a55d08 | 1261 | nfs_fill_super(s, ctx); |
ab88dca3 AV |
1262 | if (bsize) { |
1263 | s->s_blocksize_bits = bsize; | |
1264 | s->s_blocksize = 1U << bsize; | |
1265 | } | |
f2aedb71 | 1266 | nfs_get_cache_cookie(s, ctx); |
54ceac45 | 1267 | } |
f7b422b1 | 1268 | |
62a55d08 SM |
1269 | error = nfs_get_root(s, fc); |
1270 | if (error < 0) { | |
ce8866f0 | 1271 | nfs_errorf(fc, "NFS: Couldn't get root dentry"); |
54ceac45 | 1272 | goto error_splat_super; |
f2aedb71 | 1273 | } |
adf2314f | 1274 | |
1751e8a6 | 1275 | s->s_flags |= SB_ACTIVE; |
f2aedb71 | 1276 | error = 0; |
0655960f CL |
1277 | |
1278 | out: | |
f2aedb71 | 1279 | return error; |
816724e6 | 1280 | |
54ceac45 DH |
1281 | out_err_nosb: |
1282 | nfs_free_server(server); | |
0655960f | 1283 | goto out; |
54ceac45 | 1284 | error_splat_super: |
6f5bbff9 | 1285 | deactivate_locked_super(s); |
0655960f | 1286 | goto out; |
f7b422b1 DH |
1287 | } |
1288 | ||
54ceac45 DH |
1289 | /* |
1290 | * Destroy an NFS2/3 superblock | |
1291 | */ | |
fbdefd64 | 1292 | void nfs_kill_super(struct super_block *s) |
f7b422b1 DH |
1293 | { |
1294 | struct nfs_server *server = NFS_SB(s); | |
7b14a213 CH |
1295 | dev_t dev = s->s_dev; |
1296 | ||
1297 | generic_shutdown_super(s); | |
f7b422b1 | 1298 | |
08734048 | 1299 | nfs_fscache_release_super_cookie(s); |
7b14a213 | 1300 | |
54ceac45 | 1301 | nfs_free_server(server); |
7b14a213 | 1302 | free_anon_bdev(dev); |
f7b422b1 | 1303 | } |
89d77c8f | 1304 | EXPORT_SYMBOL_GPL(nfs_kill_super); |
f7b422b1 | 1305 | |
89d77c8f | 1306 | #if IS_ENABLED(CONFIG_NFS_V4) |
54ceac45 | 1307 | |
fac1e8e4 BS |
1308 | /* |
1309 | * NFS v4 module parameters need to stay in the | |
1310 | * NFS client for backwards compatibility | |
1311 | */ | |
1312 | unsigned int nfs_callback_set_tcpport; | |
5405fc44 | 1313 | unsigned short nfs_callback_nr_threads; |
fac1e8e4 BS |
1314 | /* Default cache timeout is 10 minutes */ |
1315 | unsigned int nfs_idmap_cache_timeout = 600; | |
1316 | /* Turn off NFSv4 uid/gid mapping when using AUTH_SYS */ | |
1317 | bool nfs4_disable_idmapping = true; | |
1318 | unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE; | |
5405fc44 | 1319 | unsigned short max_session_cb_slots = NFS4_DEF_CB_SLOT_TABLE_SIZE; |
fac1e8e4 | 1320 | unsigned short send_implementation_id = 1; |
6f2ea7f2 | 1321 | char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN] = ""; |
f6de7a39 | 1322 | bool recover_lost_locks = false; |
fac1e8e4 | 1323 | |
5405fc44 | 1324 | EXPORT_SYMBOL_GPL(nfs_callback_nr_threads); |
89d77c8f | 1325 | EXPORT_SYMBOL_GPL(nfs_callback_set_tcpport); |
89d77c8f BS |
1326 | EXPORT_SYMBOL_GPL(nfs_idmap_cache_timeout); |
1327 | EXPORT_SYMBOL_GPL(nfs4_disable_idmapping); | |
1328 | EXPORT_SYMBOL_GPL(max_session_slots); | |
5405fc44 | 1329 | EXPORT_SYMBOL_GPL(max_session_cb_slots); |
89d77c8f | 1330 | EXPORT_SYMBOL_GPL(send_implementation_id); |
6f2ea7f2 | 1331 | EXPORT_SYMBOL_GPL(nfs4_client_id_uniquifier); |
f6de7a39 | 1332 | EXPORT_SYMBOL_GPL(recover_lost_locks); |
89d77c8f | 1333 | |
fac1e8e4 BS |
1334 | #define NFS_CALLBACK_MAXPORTNR (65535U) |
1335 | ||
1336 | static int param_set_portnr(const char *val, const struct kernel_param *kp) | |
1337 | { | |
1338 | unsigned long num; | |
1339 | int ret; | |
1340 | ||
1341 | if (!val) | |
1342 | return -EINVAL; | |
7297cb68 | 1343 | ret = kstrtoul(val, 0, &num); |
379ebf07 | 1344 | if (ret || num > NFS_CALLBACK_MAXPORTNR) |
fac1e8e4 BS |
1345 | return -EINVAL; |
1346 | *((unsigned int *)kp->arg) = num; | |
1347 | return 0; | |
1348 | } | |
9c27847d | 1349 | static const struct kernel_param_ops param_ops_portnr = { |
fac1e8e4 BS |
1350 | .set = param_set_portnr, |
1351 | .get = param_get_uint, | |
1352 | }; | |
1353 | #define param_check_portnr(name, p) __param_check(name, p, unsigned int); | |
1354 | ||
1355 | module_param_named(callback_tcpport, nfs_callback_set_tcpport, portnr, 0644); | |
5405fc44 TM |
1356 | module_param_named(callback_nr_threads, nfs_callback_nr_threads, ushort, 0644); |
1357 | MODULE_PARM_DESC(callback_nr_threads, "Number of threads that will be " | |
1358 | "assigned to the NFSv4 callback channels."); | |
fac1e8e4 BS |
1359 | module_param(nfs_idmap_cache_timeout, int, 0644); |
1360 | module_param(nfs4_disable_idmapping, bool, 0644); | |
6f2ea7f2 CL |
1361 | module_param_string(nfs4_unique_id, nfs4_client_id_uniquifier, |
1362 | NFS4_CLIENT_ID_UNIQ_LEN, 0600); | |
fac1e8e4 BS |
1363 | MODULE_PARM_DESC(nfs4_disable_idmapping, |
1364 | "Turn off NFSv4 idmapping when using 'sec=sys'"); | |
1365 | module_param(max_session_slots, ushort, 0644); | |
1366 | MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 " | |
1367 | "requests the client will negotiate"); | |
5405fc44 | 1368 | module_param(max_session_cb_slots, ushort, 0644); |
f36ab161 | 1369 | MODULE_PARM_DESC(max_session_cb_slots, "Maximum number of parallel NFSv4.1 " |
5405fc44 | 1370 | "callbacks the client will process for a given server"); |
fac1e8e4 BS |
1371 | module_param(send_implementation_id, ushort, 0644); |
1372 | MODULE_PARM_DESC(send_implementation_id, | |
1373 | "Send implementation ID with NFSv4.1 exchange_id"); | |
6f2ea7f2 | 1374 | MODULE_PARM_DESC(nfs4_unique_id, "nfs_client_id4 uniquifier string"); |
425e776d | 1375 | |
f6de7a39 TM |
1376 | module_param(recover_lost_locks, bool, 0644); |
1377 | MODULE_PARM_DESC(recover_lost_locks, | |
1378 | "If the server reports that a lock might be lost, " | |
1379 | "try to recover it risking data corruption."); | |
1380 | ||
1381 | ||
54ceac45 | 1382 | #endif /* CONFIG_NFS_V4 */ |