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> |
0cfcd405 | 60 | #include <linux/nfs_ssc.h> |
f7b422b1 DH |
61 | |
62 | #include "nfs4_fs.h" | |
63 | #include "callback.h" | |
64 | #include "delegation.h" | |
65 | #include "iostat.h" | |
66 | #include "internal.h" | |
08734048 | 67 | #include "fscache.h" |
76e697ba | 68 | #include "nfs4session.h" |
ae50c0b5 | 69 | #include "pnfs.h" |
ab7017a3 | 70 | #include "nfs.h" |
f7b422b1 DH |
71 | |
72 | #define NFSDBG_FACILITY NFSDBG_VFS | |
bf0fd768 | 73 | |
6a74490d | 74 | const struct super_operations nfs_sops = { |
f7b422b1 | 75 | .alloc_inode = nfs_alloc_inode, |
ca1a199e | 76 | .free_inode = nfs_free_inode, |
f7b422b1 | 77 | .write_inode = nfs_write_inode, |
eed99357 | 78 | .drop_inode = nfs_drop_inode, |
f7b422b1 | 79 | .statfs = nfs_statfs, |
b57922d9 | 80 | .evict_inode = nfs_evict_inode, |
f7b422b1 DH |
81 | .umount_begin = nfs_umount_begin, |
82 | .show_options = nfs_show_options, | |
c7f404b4 AV |
83 | .show_devname = nfs_show_devname, |
84 | .show_path = nfs_show_path, | |
f7b422b1 DH |
85 | .show_stats = nfs_show_stats, |
86 | }; | |
ddda8e0a | 87 | EXPORT_SYMBOL_GPL(nfs_sops); |
f7b422b1 | 88 | |
02591f9f | 89 | #ifdef CONFIG_NFS_V4_2 |
0cfcd405 DN |
90 | static const struct nfs_ssc_client_ops nfs_ssc_clnt_ops_tbl = { |
91 | .sco_sb_deactive = nfs_sb_deactive, | |
92 | }; | |
02591f9f | 93 | #endif |
0cfcd405 | 94 | |
89d77c8f | 95 | #if IS_ENABLED(CONFIG_NFS_V4) |
1ae811ee | 96 | static int __init register_nfs4_fs(void) |
97 | { | |
98 | return register_filesystem(&nfs4_fs_type); | |
99 | } | |
100 | ||
101 | static void unregister_nfs4_fs(void) | |
102 | { | |
103 | unregister_filesystem(&nfs4_fs_type); | |
104 | } | |
105 | #else | |
106 | static int __init register_nfs4_fs(void) | |
107 | { | |
108 | return 0; | |
109 | } | |
110 | ||
111 | static void unregister_nfs4_fs(void) | |
112 | { | |
113 | } | |
f7b422b1 DH |
114 | #endif |
115 | ||
02591f9f | 116 | #ifdef CONFIG_NFS_V4_2 |
0cfcd405 DN |
117 | static void nfs_ssc_register_ops(void) |
118 | { | |
119 | nfs_ssc_register(&nfs_ssc_clnt_ops_tbl); | |
120 | } | |
121 | ||
122 | static void nfs_ssc_unregister_ops(void) | |
123 | { | |
124 | nfs_ssc_unregister(&nfs_ssc_clnt_ops_tbl); | |
125 | } | |
02591f9f | 126 | #endif /* CONFIG_NFS_V4_2 */ |
0cfcd405 | 127 | |
8e1f936b | 128 | static struct shrinker acl_shrinker = { |
1ab6c499 DC |
129 | .count_objects = nfs_access_cache_count, |
130 | .scan_objects = nfs_access_cache_scan, | |
8e1f936b RR |
131 | .seeks = DEFAULT_SEEKS, |
132 | }; | |
979df72e | 133 | |
f7b422b1 DH |
134 | /* |
135 | * Register the NFS filesystems | |
136 | */ | |
137 | int __init register_nfs_fs(void) | |
138 | { | |
139 | int ret; | |
140 | ||
141 | ret = register_filesystem(&nfs_fs_type); | |
142 | if (ret < 0) | |
143 | goto error_0; | |
144 | ||
1ae811ee | 145 | ret = register_nfs4_fs(); |
f7b422b1 DH |
146 | if (ret < 0) |
147 | goto error_1; | |
1ae811ee | 148 | |
149 | ret = nfs_register_sysctl(); | |
150 | if (ret < 0) | |
151 | goto error_2; | |
5ef8d792 KM |
152 | ret = register_shrinker(&acl_shrinker); |
153 | if (ret < 0) | |
154 | goto error_3; | |
02591f9f | 155 | #ifdef CONFIG_NFS_V4_2 |
0cfcd405 | 156 | nfs_ssc_register_ops(); |
02591f9f | 157 | #endif |
f7b422b1 | 158 | return 0; |
5ef8d792 KM |
159 | error_3: |
160 | nfs_unregister_sysctl(); | |
1ae811ee | 161 | error_2: |
162 | unregister_nfs4_fs(); | |
f7b422b1 DH |
163 | error_1: |
164 | unregister_filesystem(&nfs_fs_type); | |
f7b422b1 DH |
165 | error_0: |
166 | return ret; | |
167 | } | |
168 | ||
169 | /* | |
170 | * Unregister the NFS filesystems | |
171 | */ | |
172 | void __exit unregister_nfs_fs(void) | |
173 | { | |
8e1f936b | 174 | unregister_shrinker(&acl_shrinker); |
49af7ee1 | 175 | nfs_unregister_sysctl(); |
1ae811ee | 176 | unregister_nfs4_fs(); |
02591f9f | 177 | #ifdef CONFIG_NFS_V4_2 |
0cfcd405 | 178 | nfs_ssc_unregister_ops(); |
02591f9f | 179 | #endif |
f7b422b1 DH |
180 | unregister_filesystem(&nfs_fs_type); |
181 | } | |
182 | ||
ea7c38fe | 183 | bool nfs_sb_active(struct super_block *sb) |
ef818a28 | 184 | { |
1daef0a8 | 185 | struct nfs_server *server = NFS_SB(sb); |
ef818a28 | 186 | |
ea7c38fe TM |
187 | if (!atomic_inc_not_zero(&sb->s_active)) |
188 | return false; | |
189 | if (atomic_inc_return(&server->active) != 1) | |
190 | atomic_dec(&sb->s_active); | |
191 | return true; | |
ef818a28 | 192 | } |
89d77c8f | 193 | EXPORT_SYMBOL_GPL(nfs_sb_active); |
ef818a28 | 194 | |
1daef0a8 | 195 | void nfs_sb_deactive(struct super_block *sb) |
ef818a28 SD |
196 | { |
197 | struct nfs_server *server = NFS_SB(sb); | |
1daef0a8 TM |
198 | |
199 | if (atomic_dec_and_test(&server->active)) | |
200 | deactivate_super(sb); | |
ef818a28 | 201 | } |
89d77c8f | 202 | EXPORT_SYMBOL_GPL(nfs_sb_deactive); |
ef818a28 | 203 | |
3c9e502b TM |
204 | static int __nfs_list_for_each_server(struct list_head *head, |
205 | int (*fn)(struct nfs_server *, void *), | |
206 | void *data) | |
207 | { | |
208 | struct nfs_server *server, *last = NULL; | |
209 | int ret = 0; | |
210 | ||
211 | rcu_read_lock(); | |
212 | list_for_each_entry_rcu(server, head, client_link) { | |
9c07b75b | 213 | if (!(server->super && nfs_sb_active(server->super))) |
3c9e502b TM |
214 | continue; |
215 | rcu_read_unlock(); | |
216 | if (last) | |
217 | nfs_sb_deactive(last->super); | |
218 | last = server; | |
219 | ret = fn(server, data); | |
220 | if (ret) | |
221 | goto out; | |
222 | rcu_read_lock(); | |
223 | } | |
224 | rcu_read_unlock(); | |
225 | out: | |
226 | if (last) | |
227 | nfs_sb_deactive(last->super); | |
228 | return ret; | |
229 | } | |
230 | ||
231 | int nfs_client_for_each_server(struct nfs_client *clp, | |
232 | int (*fn)(struct nfs_server *, void *), | |
233 | void *data) | |
234 | { | |
235 | return __nfs_list_for_each_server(&clp->cl_superblocks, fn, data); | |
236 | } | |
237 | EXPORT_SYMBOL_GPL(nfs_client_for_each_server); | |
238 | ||
f7b422b1 DH |
239 | /* |
240 | * Deliver file system statistics to userspace | |
241 | */ | |
fbdefd64 | 242 | int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
f7b422b1 | 243 | { |
0c7d90cf | 244 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
f7b422b1 DH |
245 | unsigned char blockbits; |
246 | unsigned long blockres; | |
2b0143b5 | 247 | struct nfs_fh *fh = NFS_FH(d_inode(dentry)); |
ca7e9a0d TM |
248 | struct nfs_fsstat res; |
249 | int error = -ENOMEM; | |
250 | ||
251 | res.fattr = nfs_alloc_fattr(); | |
252 | if (res.fattr == NULL) | |
253 | goto out_err; | |
f7b422b1 | 254 | |
8fa5c000 | 255 | error = server->nfs_client->rpc_ops->statfs(server, fh, &res); |
fbf3fdd2 MZ |
256 | if (unlikely(error == -ESTALE)) { |
257 | struct dentry *pd_dentry; | |
258 | ||
259 | pd_dentry = dget_parent(dentry); | |
1cfb7072 AV |
260 | nfs_zap_caches(d_inode(pd_dentry)); |
261 | dput(pd_dentry); | |
fbf3fdd2 | 262 | } |
ca7e9a0d | 263 | nfs_free_fattr(res.fattr); |
f7b422b1 DH |
264 | if (error < 0) |
265 | goto out_err; | |
ca7e9a0d | 266 | |
1a0ba9ae | 267 | buf->f_type = NFS_SUPER_MAGIC; |
f7b422b1 DH |
268 | |
269 | /* | |
270 | * Current versions of glibc do not correctly handle the | |
271 | * case where f_frsize != f_bsize. Eventually we want to | |
272 | * report the value of wtmult in this field. | |
273 | */ | |
0c7d90cf | 274 | buf->f_frsize = dentry->d_sb->s_blocksize; |
f7b422b1 DH |
275 | |
276 | /* | |
277 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
278 | * are reported in units of f_frsize. Linux hasn't had | |
279 | * an f_frsize field in its statfs struct until recently, | |
280 | * thus historically Linux's sys_statfs reports these | |
281 | * fields in units of f_bsize. | |
282 | */ | |
0c7d90cf DH |
283 | buf->f_bsize = dentry->d_sb->s_blocksize; |
284 | blockbits = dentry->d_sb->s_blocksize_bits; | |
f7b422b1 DH |
285 | blockres = (1 << blockbits) - 1; |
286 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
287 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
288 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
289 | ||
290 | buf->f_files = res.tfiles; | |
291 | buf->f_ffree = res.afiles; | |
292 | ||
293 | buf->f_namelen = server->namelen; | |
1a0ba9ae | 294 | |
f7b422b1 DH |
295 | return 0; |
296 | ||
297 | out_err: | |
3110ff80 | 298 | dprintk("%s: statfs error = %d\n", __func__, -error); |
1a0ba9ae | 299 | return error; |
f7b422b1 | 300 | } |
89d77c8f | 301 | EXPORT_SYMBOL_GPL(nfs_statfs); |
f7b422b1 | 302 | |
7d4e2747 DH |
303 | /* |
304 | * Map the security flavour number to a name | |
305 | */ | |
81039f1f TM |
306 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
307 | { | |
7d4e2747 | 308 | static const struct { |
81039f1f TM |
309 | rpc_authflavor_t flavour; |
310 | const char *str; | |
4d4b69dd WAA |
311 | } sec_flavours[NFS_AUTH_INFO_MAX_FLAVORS] = { |
312 | /* update NFS_AUTH_INFO_MAX_FLAVORS when this list changes! */ | |
81039f1f TM |
313 | { RPC_AUTH_NULL, "null" }, |
314 | { RPC_AUTH_UNIX, "sys" }, | |
315 | { RPC_AUTH_GSS_KRB5, "krb5" }, | |
316 | { RPC_AUTH_GSS_KRB5I, "krb5i" }, | |
317 | { RPC_AUTH_GSS_KRB5P, "krb5p" }, | |
318 | { RPC_AUTH_GSS_LKEY, "lkey" }, | |
319 | { RPC_AUTH_GSS_LKEYI, "lkeyi" }, | |
320 | { RPC_AUTH_GSS_LKEYP, "lkeyp" }, | |
321 | { RPC_AUTH_GSS_SPKM, "spkm" }, | |
322 | { RPC_AUTH_GSS_SPKMI, "spkmi" }, | |
323 | { RPC_AUTH_GSS_SPKMP, "spkmp" }, | |
4d81cd16 | 324 | { UINT_MAX, "unknown" } |
81039f1f TM |
325 | }; |
326 | int i; | |
327 | ||
4d81cd16 | 328 | for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) { |
81039f1f TM |
329 | if (sec_flavours[i].flavour == flavour) |
330 | break; | |
331 | } | |
332 | return sec_flavours[i].str; | |
333 | } | |
334 | ||
ee671b01 JL |
335 | static void nfs_show_mountd_netid(struct seq_file *m, struct nfs_server *nfss, |
336 | int showdefaults) | |
337 | { | |
338 | struct sockaddr *sap = (struct sockaddr *) &nfss->mountd_address; | |
6f6e3c09 | 339 | char *proto = NULL; |
ee671b01 | 340 | |
ee671b01 JL |
341 | switch (sap->sa_family) { |
342 | case AF_INET: | |
343 | switch (nfss->mountd_protocol) { | |
344 | case IPPROTO_UDP: | |
6f6e3c09 | 345 | proto = RPCBIND_NETID_UDP; |
ee671b01 JL |
346 | break; |
347 | case IPPROTO_TCP: | |
6f6e3c09 | 348 | proto = RPCBIND_NETID_TCP; |
ee671b01 | 349 | break; |
ee671b01 JL |
350 | } |
351 | break; | |
352 | case AF_INET6: | |
353 | switch (nfss->mountd_protocol) { | |
354 | case IPPROTO_UDP: | |
6f6e3c09 | 355 | proto = RPCBIND_NETID_UDP6; |
ee671b01 JL |
356 | break; |
357 | case IPPROTO_TCP: | |
6f6e3c09 | 358 | proto = RPCBIND_NETID_TCP6; |
ee671b01 | 359 | break; |
ee671b01 JL |
360 | } |
361 | break; | |
ee671b01 | 362 | } |
6f6e3c09 N |
363 | if (proto || showdefaults) |
364 | seq_printf(m, ",mountproto=%s", proto ?: "auto"); | |
ee671b01 JL |
365 | } |
366 | ||
82d101d5 CL |
367 | static void nfs_show_mountd_options(struct seq_file *m, struct nfs_server *nfss, |
368 | int showdefaults) | |
369 | { | |
370 | struct sockaddr *sap = (struct sockaddr *)&nfss->mountd_address; | |
371 | ||
d5eff1a3 BS |
372 | if (nfss->flags & NFS_MOUNT_LEGACY_INTERFACE) |
373 | return; | |
374 | ||
82d101d5 CL |
375 | switch (sap->sa_family) { |
376 | case AF_INET: { | |
377 | struct sockaddr_in *sin = (struct sockaddr_in *)sap; | |
be859405 | 378 | seq_printf(m, ",mountaddr=%pI4", &sin->sin_addr.s_addr); |
82d101d5 CL |
379 | break; |
380 | } | |
381 | case AF_INET6: { | |
382 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
d250e190 | 383 | seq_printf(m, ",mountaddr=%pI6c", &sin6->sin6_addr); |
82d101d5 CL |
384 | break; |
385 | } | |
386 | default: | |
387 | if (showdefaults) | |
1c316e39 | 388 | seq_puts(m, ",mountaddr=unspecified"); |
82d101d5 CL |
389 | } |
390 | ||
391 | if (nfss->mountd_version || showdefaults) | |
392 | seq_printf(m, ",mountvers=%u", nfss->mountd_version); | |
aa699473 SK |
393 | if ((nfss->mountd_port && |
394 | nfss->mountd_port != (unsigned short)NFS_UNSPEC_PORT) || | |
395 | showdefaults) | |
82d101d5 CL |
396 | seq_printf(m, ",mountport=%u", nfss->mountd_port); |
397 | ||
ee671b01 | 398 | nfs_show_mountd_netid(m, nfss, showdefaults); |
82d101d5 CL |
399 | } |
400 | ||
89d77c8f | 401 | #if IS_ENABLED(CONFIG_NFS_V4) |
0be8189f TM |
402 | static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss, |
403 | int showdefaults) | |
404 | { | |
405 | struct nfs_client *clp = nfss->nfs_client; | |
406 | ||
407 | seq_printf(m, ",clientaddr=%s", clp->cl_ipaddr); | |
0be8189f TM |
408 | } |
409 | #else | |
410 | static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss, | |
411 | int showdefaults) | |
412 | { | |
413 | } | |
414 | #endif | |
415 | ||
7bbceb6f TM |
416 | static void nfs_show_nfs_version(struct seq_file *m, |
417 | unsigned int version, | |
418 | unsigned int minorversion) | |
419 | { | |
420 | seq_printf(m, ",vers=%u", version); | |
421 | if (version == 4) | |
422 | seq_printf(m, ".%u", minorversion); | |
423 | } | |
424 | ||
f7b422b1 DH |
425 | /* |
426 | * Describe the mount options in force on this server representation | |
427 | */ | |
82d101d5 CL |
428 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, |
429 | int showdefaults) | |
f7b422b1 | 430 | { |
509de811 | 431 | static const struct proc_nfs_info { |
f7b422b1 | 432 | int flag; |
509de811 DH |
433 | const char *str; |
434 | const char *nostr; | |
f7b422b1 | 435 | } nfs_info[] = { |
91a575e1 TM |
436 | { NFS_MOUNT_SOFT, ",soft", "" }, |
437 | { NFS_MOUNT_SOFTERR, ",softerr", "" }, | |
c74dfe97 | 438 | { NFS_MOUNT_SOFTREVAL, ",softreval", "" }, |
82d101d5 | 439 | { NFS_MOUNT_POSIX, ",posix", "" }, |
f7b422b1 DH |
440 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
441 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
442 | { NFS_MOUNT_NONLM, ",nolock", "" }, | |
443 | { NFS_MOUNT_NOACL, ",noacl", "" }, | |
74dd34e6 | 444 | { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" }, |
d740351b CL |
445 | { NFS_MOUNT_UNSHARED, ",nosharecache", "" }, |
446 | { NFS_MOUNT_NORESVPORT, ",noresvport", "" }, | |
f7b422b1 DH |
447 | { 0, NULL, NULL } |
448 | }; | |
509de811 | 449 | const struct proc_nfs_info *nfs_infop; |
8fa5c000 | 450 | struct nfs_client *clp = nfss->nfs_client; |
82d101d5 | 451 | u32 version = clp->rpc_ops->version; |
7c563cc9 | 452 | int local_flock, local_fcntl; |
f7b422b1 | 453 | |
7bbceb6f | 454 | nfs_show_nfs_version(m, version, clp->cl_minorversion); |
2d767432 CL |
455 | seq_printf(m, ",rsize=%u", nfss->rsize); |
456 | seq_printf(m, ",wsize=%u", nfss->wsize); | |
82d101d5 CL |
457 | if (nfss->bsize != 0) |
458 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
459 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
0e0cab74 | 460 | if (nfss->acregmin != NFS_DEF_ACREGMIN*HZ || showdefaults) |
2d767432 | 461 | seq_printf(m, ",acregmin=%u", nfss->acregmin/HZ); |
0e0cab74 | 462 | if (nfss->acregmax != NFS_DEF_ACREGMAX*HZ || showdefaults) |
2d767432 | 463 | seq_printf(m, ",acregmax=%u", nfss->acregmax/HZ); |
0e0cab74 | 464 | if (nfss->acdirmin != NFS_DEF_ACDIRMIN*HZ || showdefaults) |
2d767432 | 465 | seq_printf(m, ",acdirmin=%u", nfss->acdirmin/HZ); |
0e0cab74 | 466 | if (nfss->acdirmax != NFS_DEF_ACDIRMAX*HZ || showdefaults) |
2d767432 | 467 | seq_printf(m, ",acdirmax=%u", nfss->acdirmax/HZ); |
91a575e1 TM |
468 | if (!(nfss->flags & (NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR))) |
469 | seq_puts(m, ",hard"); | |
f7b422b1 DH |
470 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { |
471 | if (nfss->flags & nfs_infop->flag) | |
472 | seq_puts(m, nfs_infop->str); | |
473 | else | |
474 | seq_puts(m, nfs_infop->nostr); | |
475 | } | |
2446ab60 | 476 | rcu_read_lock(); |
56928edd | 477 | seq_printf(m, ",proto=%s", |
ee671b01 | 478 | rpc_peeraddr2str(nfss->client, RPC_DISPLAY_NETID)); |
2446ab60 | 479 | rcu_read_unlock(); |
fd87c8b7 TM |
480 | if (clp->cl_nconnect > 0) |
481 | seq_printf(m, ",nconnect=%u", clp->cl_nconnect); | |
82d101d5 CL |
482 | if (version == 4) { |
483 | if (nfss->port != NFS_PORT) | |
484 | seq_printf(m, ",port=%u", nfss->port); | |
485 | } else | |
486 | if (nfss->port) | |
487 | seq_printf(m, ",port=%u", nfss->port); | |
488 | ||
33170233 TM |
489 | seq_printf(m, ",timeo=%lu", 10U * nfss->client->cl_timeout->to_initval / HZ); |
490 | seq_printf(m, ",retrans=%u", nfss->client->cl_timeout->to_retries); | |
81039f1f | 491 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
82d101d5 CL |
492 | |
493 | if (version != 4) | |
494 | nfs_show_mountd_options(m, nfss, showdefaults); | |
0be8189f TM |
495 | else |
496 | nfs_show_nfsv4_options(m, nfss, showdefaults); | |
82d101d5 | 497 | |
b797cac7 | 498 | if (nfss->options & NFS_OPTION_FSCACHE) |
1c316e39 | 499 | seq_puts(m, ",fsc"); |
9b00c643 | 500 | |
89652617 | 501 | if (nfss->options & NFS_OPTION_MIGRATION) |
1c316e39 | 502 | seq_puts(m, ",migration"); |
89652617 | 503 | |
9b00c643 PL |
504 | if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONEG) { |
505 | if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONE) | |
1c316e39 | 506 | seq_puts(m, ",lookupcache=none"); |
9b00c643 | 507 | else |
1c316e39 | 508 | seq_puts(m, ",lookupcache=pos"); |
9b00c643 | 509 | } |
7c563cc9 SJ |
510 | |
511 | local_flock = nfss->flags & NFS_MOUNT_LOCAL_FLOCK; | |
512 | local_fcntl = nfss->flags & NFS_MOUNT_LOCAL_FCNTL; | |
513 | ||
514 | if (!local_flock && !local_fcntl) | |
1c316e39 | 515 | seq_puts(m, ",local_lock=none"); |
7c563cc9 | 516 | else if (local_flock && local_fcntl) |
1c316e39 | 517 | seq_puts(m, ",local_lock=all"); |
7c563cc9 | 518 | else if (local_flock) |
1c316e39 | 519 | seq_puts(m, ",local_lock=flock"); |
7c563cc9 | 520 | else |
1c316e39 | 521 | seq_puts(m, ",local_lock=posix"); |
7ae017c7 TM |
522 | |
523 | if (nfss->flags & NFS_MOUNT_WRITE_EAGER) { | |
524 | if (nfss->flags & NFS_MOUNT_WRITE_WAIT) | |
525 | seq_puts(m, ",write=wait"); | |
526 | else | |
527 | seq_puts(m, ",write=eager"); | |
528 | } | |
f7b422b1 DH |
529 | } |
530 | ||
531 | /* | |
532 | * Describe the mount options on this VFS mountpoint | |
533 | */ | |
fbdefd64 | 534 | int nfs_show_options(struct seq_file *m, struct dentry *root) |
f7b422b1 | 535 | { |
34c80b1d | 536 | struct nfs_server *nfss = NFS_SB(root->d_sb); |
f7b422b1 DH |
537 | |
538 | nfs_show_mount_options(m, nfss, 0); | |
539 | ||
2446ab60 | 540 | rcu_read_lock(); |
5d8515ca CL |
541 | seq_printf(m, ",addr=%s", |
542 | rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient, | |
543 | RPC_DISPLAY_ADDR)); | |
2446ab60 | 544 | rcu_read_unlock(); |
f7b422b1 DH |
545 | |
546 | return 0; | |
547 | } | |
89d77c8f | 548 | EXPORT_SYMBOL_GPL(nfs_show_options); |
45402c38 | 549 | |
89d77c8f | 550 | #if IS_ENABLED(CONFIG_NFS_V4) |
1a7441b2 DW |
551 | static void show_lease(struct seq_file *m, struct nfs_server *server) |
552 | { | |
553 | struct nfs_client *clp = server->nfs_client; | |
554 | unsigned long expire; | |
555 | ||
556 | seq_printf(m, ",lease_time=%ld", clp->cl_lease_time / HZ); | |
557 | expire = clp->cl_last_renewal + clp->cl_lease_time; | |
558 | seq_printf(m, ",lease_expired=%ld", | |
559 | time_after(expire, jiffies) ? 0 : (jiffies - expire) / HZ); | |
560 | } | |
ae50c0b5 | 561 | #ifdef CONFIG_NFS_V4_1 |
45402c38 | 562 | static void show_sessions(struct seq_file *m, struct nfs_server *server) |
ae50c0b5 BF |
563 | { |
564 | if (nfs4_has_session(server->nfs_client)) | |
1c316e39 | 565 | seq_puts(m, ",sessions"); |
ae50c0b5 BF |
566 | } |
567 | #else | |
45402c38 HS |
568 | static void show_sessions(struct seq_file *m, struct nfs_server *server) {} |
569 | #endif | |
ae50c0b5 BF |
570 | #endif |
571 | ||
572 | #ifdef CONFIG_NFS_V4_1 | |
45402c38 | 573 | static void show_pnfs(struct seq_file *m, struct nfs_server *server) |
ae50c0b5 BF |
574 | { |
575 | seq_printf(m, ",pnfs="); | |
576 | if (server->pnfs_curr_ld) | |
577 | seq_printf(m, "%s", server->pnfs_curr_ld->name); | |
578 | else | |
579 | seq_printf(m, "not configured"); | |
580 | } | |
7e03b7cc TM |
581 | |
582 | static void show_implementation_id(struct seq_file *m, struct nfs_server *nfss) | |
583 | { | |
59155546 CL |
584 | if (nfss->nfs_client && nfss->nfs_client->cl_implid) { |
585 | struct nfs41_impl_id *impl_id = nfss->nfs_client->cl_implid; | |
7e03b7cc TM |
586 | seq_printf(m, "\n\timpl_id:\tname='%s',domain='%s'," |
587 | "date='%llu,%u'", | |
588 | impl_id->name, impl_id->domain, | |
589 | impl_id->date.seconds, impl_id->date.nseconds); | |
590 | } | |
591 | } | |
45402c38 | 592 | #else |
89d77c8f | 593 | #if IS_ENABLED(CONFIG_NFS_V4) |
7e03b7cc TM |
594 | static void show_pnfs(struct seq_file *m, struct nfs_server *server) |
595 | { | |
596 | } | |
45402c38 | 597 | #endif |
7e03b7cc TM |
598 | static void show_implementation_id(struct seq_file *m, struct nfs_server *nfss) |
599 | { | |
600 | } | |
45402c38 | 601 | #endif |
f7b422b1 | 602 | |
fbdefd64 | 603 | int nfs_show_devname(struct seq_file *m, struct dentry *root) |
c7f404b4 AV |
604 | { |
605 | char *page = (char *) __get_free_page(GFP_KERNEL); | |
606 | char *devname, *dummy; | |
607 | int err = 0; | |
608 | if (!page) | |
609 | return -ENOMEM; | |
97a54868 | 610 | devname = nfs_path(&dummy, root, page, PAGE_SIZE, 0); |
c7f404b4 AV |
611 | if (IS_ERR(devname)) |
612 | err = PTR_ERR(devname); | |
613 | else | |
614 | seq_escape(m, devname, " \t\n\\"); | |
615 | free_page((unsigned long)page); | |
616 | return err; | |
617 | } | |
89d77c8f | 618 | EXPORT_SYMBOL_GPL(nfs_show_devname); |
c7f404b4 | 619 | |
fbdefd64 | 620 | int nfs_show_path(struct seq_file *m, struct dentry *dentry) |
c7f404b4 AV |
621 | { |
622 | seq_puts(m, "/"); | |
623 | return 0; | |
624 | } | |
89d77c8f | 625 | EXPORT_SYMBOL_GPL(nfs_show_path); |
c7f404b4 | 626 | |
f7b422b1 DH |
627 | /* |
628 | * Present statistical information for this VFS mountpoint | |
629 | */ | |
fbdefd64 | 630 | int nfs_show_stats(struct seq_file *m, struct dentry *root) |
f7b422b1 DH |
631 | { |
632 | int i, cpu; | |
64132379 | 633 | struct nfs_server *nfss = NFS_SB(root->d_sb); |
f7b422b1 DH |
634 | struct rpc_auth *auth = nfss->client->cl_auth; |
635 | struct nfs_iostats totals = { }; | |
636 | ||
637 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
638 | ||
639 | /* | |
640 | * Display all mount option settings | |
641 | */ | |
1c316e39 | 642 | seq_puts(m, "\n\topts:\t"); |
bc98a42c | 643 | seq_puts(m, sb_rdonly(root->d_sb) ? "ro" : "rw"); |
1751e8a6 LT |
644 | seq_puts(m, root->d_sb->s_flags & SB_SYNCHRONOUS ? ",sync" : ""); |
645 | seq_puts(m, root->d_sb->s_flags & SB_NOATIME ? ",noatime" : ""); | |
646 | seq_puts(m, root->d_sb->s_flags & SB_NODIRATIME ? ",nodiratime" : ""); | |
f7b422b1 DH |
647 | nfs_show_mount_options(m, nfss, 1); |
648 | ||
649 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); | |
650 | ||
7e03b7cc | 651 | show_implementation_id(m, nfss); |
7d2ed9ac | 652 | |
1c316e39 | 653 | seq_puts(m, "\n\tcaps:\t"); |
f7b422b1 | 654 | seq_printf(m, "caps=0x%x", nfss->caps); |
2d767432 CL |
655 | seq_printf(m, ",wtmult=%u", nfss->wtmult); |
656 | seq_printf(m, ",dtsize=%u", nfss->dtsize); | |
657 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
658 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
f7b422b1 | 659 | |
89d77c8f | 660 | #if IS_ENABLED(CONFIG_NFS_V4) |
40c55319 | 661 | if (nfss->nfs_client->rpc_ops->version == 4) { |
1c316e39 | 662 | seq_puts(m, "\n\tnfsv4:\t"); |
f7b422b1 DH |
663 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); |
664 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
a09df2ca | 665 | seq_printf(m, ",bm2=0x%x", nfss->attr_bitmask[2]); |
f7b422b1 | 666 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); |
ae50c0b5 BF |
667 | show_sessions(m, nfss); |
668 | show_pnfs(m, nfss); | |
1a7441b2 | 669 | show_lease(m, nfss); |
f7b422b1 DH |
670 | } |
671 | #endif | |
672 | ||
673 | /* | |
674 | * Display security flavor in effect for this mount | |
675 | */ | |
2d767432 | 676 | seq_printf(m, "\n\tsec:\tflavor=%u", auth->au_ops->au_flavor); |
f7b422b1 | 677 | if (auth->au_flavor) |
2d767432 | 678 | seq_printf(m, ",pseudoflavor=%u", auth->au_flavor); |
f7b422b1 DH |
679 | |
680 | /* | |
681 | * Display superblock I/O counters | |
682 | */ | |
683 | for_each_possible_cpu(cpu) { | |
684 | struct nfs_iostats *stats; | |
685 | ||
686 | preempt_disable(); | |
687 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
688 | ||
689 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
690 | totals.events[i] += stats->events[i]; | |
691 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
692 | totals.bytes[i] += stats->bytes[i]; | |
6a51091d DH |
693 | #ifdef CONFIG_NFS_FSCACHE |
694 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) | |
695 | totals.fscache[i] += stats->fscache[i]; | |
696 | #endif | |
f7b422b1 DH |
697 | |
698 | preempt_enable(); | |
699 | } | |
700 | ||
1c316e39 | 701 | seq_puts(m, "\n\tevents:\t"); |
f7b422b1 DH |
702 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) |
703 | seq_printf(m, "%lu ", totals.events[i]); | |
1c316e39 | 704 | seq_puts(m, "\n\tbytes:\t"); |
f7b422b1 DH |
705 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) |
706 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
6a51091d DH |
707 | #ifdef CONFIG_NFS_FSCACHE |
708 | if (nfss->options & NFS_OPTION_FSCACHE) { | |
1c316e39 | 709 | seq_puts(m, "\n\tfsc:\t"); |
6a51091d | 710 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) |
ce85bd29 | 711 | seq_printf(m, "%Lu ", totals.fscache[i]); |
6a51091d DH |
712 | } |
713 | #endif | |
9bcaa35c | 714 | seq_putc(m, '\n'); |
f7b422b1 | 715 | |
016583d7 | 716 | rpc_clnt_show_stats(m, nfss->client); |
f7b422b1 DH |
717 | |
718 | return 0; | |
719 | } | |
89d77c8f | 720 | EXPORT_SYMBOL_GPL(nfs_show_stats); |
f7b422b1 DH |
721 | |
722 | /* | |
723 | * Begin unmount by attempting to remove all automounted mountpoints we added | |
54ceac45 | 724 | * in response to xdev traversals and referrals |
f7b422b1 | 725 | */ |
fbdefd64 | 726 | void nfs_umount_begin(struct super_block *sb) |
f7b422b1 | 727 | { |
67e55205 | 728 | struct nfs_server *server; |
fc6ae3cf TM |
729 | struct rpc_clnt *rpc; |
730 | ||
67e55205 | 731 | server = NFS_SB(sb); |
fc6ae3cf TM |
732 | /* -EIO all pending I/O */ |
733 | rpc = server->client_acl; | |
734 | if (!IS_ERR(rpc)) | |
735 | rpc_killall_tasks(rpc); | |
736 | rpc = server->client; | |
737 | if (!IS_ERR(rpc)) | |
738 | rpc_killall_tasks(rpc); | |
f7b422b1 | 739 | } |
89d77c8f | 740 | EXPORT_SYMBOL_GPL(nfs_umount_begin); |
f7b422b1 | 741 | |
4d4b69dd WAA |
742 | /* |
743 | * Return true if 'match' is in auth_info or auth_info is empty. | |
744 | * Return false otherwise. | |
745 | */ | |
746 | bool nfs_auth_info_match(const struct nfs_auth_info *auth_info, | |
747 | rpc_authflavor_t match) | |
748 | { | |
749 | int i; | |
750 | ||
751 | if (!auth_info->flavor_len) | |
752 | return true; | |
753 | ||
754 | for (i = 0; i < auth_info->flavor_len; i++) { | |
755 | if (auth_info->flavors[i] == match) | |
756 | return true; | |
757 | } | |
758 | return false; | |
759 | } | |
760 | EXPORT_SYMBOL_GPL(nfs_auth_info_match); | |
761 | ||
ec88f28d | 762 | /* |
38465f5d SM |
763 | * Ensure that a specified authtype in ctx->auth_info is supported by |
764 | * the server. Returns 0 and sets ctx->selected_flavor if it's ok, and | |
4d4b69dd | 765 | * -EACCES if not. |
ec88f28d | 766 | */ |
38465f5d | 767 | static int nfs_verify_authflavors(struct nfs_fs_context *ctx, |
5eb005ca DH |
768 | rpc_authflavor_t *server_authlist, |
769 | unsigned int count) | |
ec88f28d | 770 | { |
4d4b69dd | 771 | rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; |
53a75f22 | 772 | bool found_auth_null = false; |
9111c95b | 773 | unsigned int i; |
4580a92d | 774 | |
d497ab97 WAA |
775 | /* |
776 | * If the sec= mount option is used, the specified flavor or AUTH_NULL | |
777 | * must be in the list returned by the server. | |
778 | * | |
779 | * AUTH_NULL has a special meaning when it's in the server list - it | |
780 | * means that the server will ignore the rpc creds, so any flavor | |
e68fd7c8 | 781 | * can be used but still use the sec= that was specified. |
53a75f22 CL |
782 | * |
783 | * Note also that the MNT procedure in MNTv1 does not return a list | |
784 | * of supported security flavors. In this case, nfs_mount() fabricates | |
785 | * a security flavor list containing just AUTH_NULL. | |
d497ab97 | 786 | */ |
4580a92d | 787 | for (i = 0; i < count; i++) { |
4d4b69dd WAA |
788 | flavor = server_authlist[i]; |
789 | ||
38465f5d | 790 | if (nfs_auth_info_match(&ctx->auth_info, flavor)) |
9111c95b | 791 | goto out; |
e68fd7c8 SD |
792 | |
793 | if (flavor == RPC_AUTH_NULL) | |
53a75f22 | 794 | found_auth_null = true; |
e68fd7c8 SD |
795 | } |
796 | ||
53a75f22 | 797 | if (found_auth_null) { |
38465f5d | 798 | flavor = ctx->auth_info.flavors[0]; |
e68fd7c8 | 799 | goto out; |
4580a92d | 800 | } |
ec88f28d | 801 | |
4d4b69dd WAA |
802 | dfprintk(MOUNT, |
803 | "NFS: specified auth flavors not supported by server\n"); | |
9111c95b | 804 | return -EACCES; |
d497ab97 | 805 | |
4580a92d | 806 | out: |
38465f5d SM |
807 | ctx->selected_flavor = flavor; |
808 | dfprintk(MOUNT, "NFS: using auth flavor %u\n", ctx->selected_flavor); | |
d497ab97 | 809 | return 0; |
ec88f28d CL |
810 | } |
811 | ||
0076d7b7 CL |
812 | /* |
813 | * Use the remote server's MOUNT service to request the NFS file handle | |
814 | * corresponding to the provided path. | |
815 | */ | |
62a55d08 | 816 | static int nfs_request_mount(struct fs_context *fc, |
294ae81d JL |
817 | struct nfs_fh *root_fh, |
818 | rpc_authflavor_t *server_authlist, | |
819 | unsigned int *server_authlist_len) | |
0076d7b7 | 820 | { |
62a55d08 | 821 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
c5d120f8 CL |
822 | struct nfs_mount_request request = { |
823 | .sap = (struct sockaddr *) | |
38465f5d SM |
824 | &ctx->mount_server.address, |
825 | .dirpath = ctx->nfs_server.export_path, | |
826 | .protocol = ctx->mount_server.protocol, | |
c5d120f8 | 827 | .fh = root_fh, |
38465f5d | 828 | .noresvport = ctx->flags & NFS_MOUNT_NORESVPORT, |
294ae81d | 829 | .auth_flav_len = server_authlist_len, |
ec88f28d | 830 | .auth_flavs = server_authlist, |
62a55d08 | 831 | .net = fc->net_ns, |
c5d120f8 | 832 | }; |
4c568017 | 833 | int status; |
0076d7b7 | 834 | |
38465f5d SM |
835 | if (ctx->mount_server.version == 0) { |
836 | switch (ctx->version) { | |
8a6e5deb | 837 | default: |
38465f5d | 838 | ctx->mount_server.version = NFS_MNT3_VERSION; |
8a6e5deb TM |
839 | break; |
840 | case 2: | |
38465f5d | 841 | ctx->mount_server.version = NFS_MNT_VERSION; |
8a6e5deb | 842 | } |
0076d7b7 | 843 | } |
38465f5d | 844 | request.version = ctx->mount_server.version; |
0076d7b7 | 845 | |
38465f5d SM |
846 | if (ctx->mount_server.hostname) |
847 | request.hostname = ctx->mount_server.hostname; | |
33832034 | 848 | else |
38465f5d | 849 | request.hostname = ctx->nfs_server.hostname; |
33832034 | 850 | |
0076d7b7 CL |
851 | /* |
852 | * Construct the mount server's address. | |
853 | */ | |
38465f5d SM |
854 | if (ctx->mount_server.address.sa_family == AF_UNSPEC) { |
855 | memcpy(request.sap, &ctx->nfs_server.address, | |
856 | ctx->nfs_server.addrlen); | |
857 | ctx->mount_server.addrlen = ctx->nfs_server.addrlen; | |
4c568017 | 858 | } |
38465f5d SM |
859 | request.salen = ctx->mount_server.addrlen; |
860 | nfs_set_port(request.sap, &ctx->mount_server.port, 0); | |
0076d7b7 CL |
861 | |
862 | /* | |
863 | * Now ask the mount server to map our export path | |
864 | * to a file handle. | |
865 | */ | |
c9301cb3 | 866 | status = nfs_mount(&request, ctx->timeo, ctx->retrans); |
ec88f28d CL |
867 | if (status != 0) { |
868 | dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n", | |
869 | request.hostname, status); | |
870 | return status; | |
871 | } | |
0076d7b7 | 872 | |
9111c95b | 873 | return 0; |
0076d7b7 CL |
874 | } |
875 | ||
62a55d08 | 876 | static struct nfs_server *nfs_try_mount_request(struct fs_context *fc) |
d17540c6 | 877 | { |
62a55d08 | 878 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
d17540c6 | 879 | int status; |
9111c95b JL |
880 | unsigned int i; |
881 | bool tried_auth_unix = false; | |
882 | bool auth_null_in_list = false; | |
883 | struct nfs_server *server = ERR_PTR(-EACCES); | |
294ae81d JL |
884 | rpc_authflavor_t authlist[NFS_MAX_SECFLAVORS]; |
885 | unsigned int authlist_len = ARRAY_SIZE(authlist); | |
d17540c6 | 886 | |
62a55d08 | 887 | status = nfs_request_mount(fc, ctx->mntfh, authlist, &authlist_len); |
d17540c6 JL |
888 | if (status) |
889 | return ERR_PTR(status); | |
890 | ||
9111c95b JL |
891 | /* |
892 | * Was a sec= authflavor specified in the options? First, verify | |
893 | * whether the server supports it, and then just try to use it if so. | |
894 | */ | |
5eb005ca DH |
895 | if (ctx->auth_info.flavor_len > 0) { |
896 | status = nfs_verify_authflavors(ctx, authlist, authlist_len); | |
a3f73c27 | 897 | dfprintk(MOUNT, "NFS: using auth flavor %u\n", |
5eb005ca | 898 | ctx->selected_flavor); |
9111c95b JL |
899 | if (status) |
900 | return ERR_PTR(status); | |
62a55d08 | 901 | return ctx->nfs_mod->rpc_ops->create_server(fc); |
9111c95b JL |
902 | } |
903 | ||
904 | /* | |
905 | * No sec= option was provided. RFC 2623, section 2.7 suggests we | |
906 | * SHOULD prefer the flavor listed first. However, some servers list | |
907 | * AUTH_NULL first. Avoid ever choosing AUTH_NULL. | |
908 | */ | |
909 | for (i = 0; i < authlist_len; ++i) { | |
910 | rpc_authflavor_t flavor; | |
911 | struct rpcsec_gss_info info; | |
912 | ||
913 | flavor = authlist[i]; | |
914 | switch (flavor) { | |
915 | case RPC_AUTH_UNIX: | |
916 | tried_auth_unix = true; | |
917 | break; | |
918 | case RPC_AUTH_NULL: | |
919 | auth_null_in_list = true; | |
920 | continue; | |
921 | default: | |
922 | if (rpcauth_get_gssinfo(flavor, &info) != 0) | |
923 | continue; | |
fb08334b | 924 | break; |
9111c95b JL |
925 | } |
926 | dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", flavor); | |
5eb005ca | 927 | ctx->selected_flavor = flavor; |
62a55d08 | 928 | server = ctx->nfs_mod->rpc_ops->create_server(fc); |
9111c95b JL |
929 | if (!IS_ERR(server)) |
930 | return server; | |
931 | } | |
932 | ||
933 | /* | |
934 | * Nothing we tried so far worked. At this point, give up if we've | |
935 | * already tried AUTH_UNIX or if the server's list doesn't contain | |
936 | * AUTH_NULL | |
937 | */ | |
938 | if (tried_auth_unix || !auth_null_in_list) | |
939 | return server; | |
940 | ||
941 | /* Last chance! Try AUTH_UNIX */ | |
942 | dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", RPC_AUTH_UNIX); | |
5eb005ca | 943 | ctx->selected_flavor = RPC_AUTH_UNIX; |
62a55d08 | 944 | return ctx->nfs_mod->rpc_ops->create_server(fc); |
d17540c6 JL |
945 | } |
946 | ||
f2aedb71 | 947 | int nfs_try_get_tree(struct fs_context *fc) |
486aa699 | 948 | { |
f2aedb71 DH |
949 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
950 | ||
951 | if (ctx->need_mount) | |
62a55d08 | 952 | ctx->server = nfs_try_mount_request(fc); |
d17540c6 | 953 | else |
62a55d08 | 954 | ctx->server = ctx->nfs_mod->rpc_ops->create_server(fc); |
486aa699 | 955 | |
f2aedb71 | 956 | return nfs_get_tree_common(fc); |
486aa699 | 957 | } |
f2aedb71 DH |
958 | EXPORT_SYMBOL_GPL(nfs_try_get_tree); |
959 | ||
486aa699 | 960 | |
71a6ec8a | 961 | #define NFS_REMOUNT_CMP_FLAGMASK ~(NFS_MOUNT_INTR \ |
c8e47028 SM |
962 | | NFS_MOUNT_SECURE \ |
963 | | NFS_MOUNT_TCP \ | |
964 | | NFS_MOUNT_VER3 \ | |
965 | | NFS_MOUNT_KERBEROS \ | |
966 | | NFS_MOUNT_NONLM \ | |
967 | | NFS_MOUNT_BROKEN_SUID \ | |
968 | | NFS_MOUNT_STRICTLOCK \ | |
c8e47028 SM |
969 | | NFS_MOUNT_LEGACY_INTERFACE) |
970 | ||
71a6ec8a SM |
971 | #define NFS_MOUNT_CMP_FLAGMASK (NFS_REMOUNT_CMP_FLAGMASK & \ |
972 | ~(NFS_MOUNT_UNSHARED | NFS_MOUNT_NORESVPORT)) | |
973 | ||
48b605f8 JL |
974 | static int |
975 | nfs_compare_remount_data(struct nfs_server *nfss, | |
5eb005ca | 976 | struct nfs_fs_context *ctx) |
48b605f8 | 977 | { |
5eb005ca DH |
978 | if ((ctx->flags ^ nfss->flags) & NFS_REMOUNT_CMP_FLAGMASK || |
979 | ctx->rsize != nfss->rsize || | |
980 | ctx->wsize != nfss->wsize || | |
981 | ctx->version != nfss->nfs_client->rpc_ops->version || | |
982 | ctx->minorversion != nfss->nfs_client->cl_minorversion || | |
983 | ctx->retrans != nfss->client->cl_timeout->to_retries || | |
984 | !nfs_auth_info_match(&ctx->auth_info, nfss->client->cl_auth->au_flavor) || | |
985 | ctx->acregmin != nfss->acregmin / HZ || | |
986 | ctx->acregmax != nfss->acregmax / HZ || | |
987 | ctx->acdirmin != nfss->acdirmin / HZ || | |
988 | ctx->acdirmax != nfss->acdirmax / HZ || | |
989 | ctx->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) || | |
990 | (ctx->options & NFS_OPTION_FSCACHE) != (nfss->options & NFS_OPTION_FSCACHE) || | |
991 | ctx->nfs_server.port != nfss->port || | |
992 | ctx->nfs_server.addrlen != nfss->nfs_client->cl_addrlen || | |
993 | !rpc_cmp_addr((struct sockaddr *)&ctx->nfs_server.address, | |
a1be9eee | 994 | (struct sockaddr *)&nfss->nfs_client->cl_addr)) |
48b605f8 JL |
995 | return -EINVAL; |
996 | ||
997 | return 0; | |
998 | } | |
999 | ||
f2aedb71 | 1000 | int nfs_reconfigure(struct fs_context *fc) |
48b605f8 | 1001 | { |
f2aedb71 DH |
1002 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
1003 | struct super_block *sb = fc->root->d_sb; | |
48b605f8 | 1004 | struct nfs_server *nfss = sb->s_fs_info; |
48b605f8 | 1005 | |
02b9984d TT |
1006 | sync_filesystem(sb); |
1007 | ||
48b605f8 JL |
1008 | /* |
1009 | * Userspace mount programs that send binary options generally send | |
1010 | * them populated with default values. We have no way to know which | |
1011 | * ones were explicitly specified. Fall back to legacy behavior and | |
1012 | * just return success. | |
1013 | */ | |
f2aedb71 | 1014 | if (ctx->skip_reconfig_option_check) |
48b605f8 JL |
1015 | return 0; |
1016 | ||
26c4c170 JL |
1017 | /* |
1018 | * noac is a special case. It implies -o sync, but that's not | |
f2aedb71 | 1019 | * necessarily reflected in the mtab options. reconfigure_super |
1751e8a6 | 1020 | * will clear SB_SYNCHRONOUS if -o sync wasn't specified in the |
26c4c170 JL |
1021 | * remount options, so we have to explicitly reset it. |
1022 | */ | |
f2aedb71 DH |
1023 | if (ctx->flags & NFS_MOUNT_NOAC) { |
1024 | fc->sb_flags |= SB_SYNCHRONOUS; | |
1025 | fc->sb_flags_mask |= SB_SYNCHRONOUS; | |
1026 | } | |
26c4c170 | 1027 | |
48b605f8 | 1028 | /* compare new mount options with old ones */ |
f2aedb71 | 1029 | return nfs_compare_remount_data(nfss, ctx); |
48b605f8 | 1030 | } |
f2aedb71 | 1031 | EXPORT_SYMBOL_GPL(nfs_reconfigure); |
48b605f8 | 1032 | |
f7b422b1 | 1033 | /* |
ab88dca3 | 1034 | * Finish setting up an NFS superblock |
f7b422b1 | 1035 | */ |
62a55d08 | 1036 | static void nfs_fill_super(struct super_block *sb, struct nfs_fs_context *ctx) |
f7b422b1 DH |
1037 | { |
1038 | struct nfs_server *server = NFS_SB(sb); | |
5006a76c | 1039 | |
54ceac45 DH |
1040 | sb->s_blocksize_bits = 0; |
1041 | sb->s_blocksize = 0; | |
6a74490d BS |
1042 | sb->s_xattr = server->nfs_client->cl_nfs_mod->xattr; |
1043 | sb->s_op = server->nfs_client->cl_nfs_mod->sops; | |
8c6d76a3 | 1044 | if (ctx->bsize) |
5eb005ca | 1045 | sb->s_blocksize = nfs_block_size(ctx->bsize, &sb->s_blocksize_bits); |
f7b422b1 | 1046 | |
6a74490d | 1047 | if (server->nfs_client->rpc_ops->version != 2) { |
54ceac45 DH |
1048 | /* The VFS shouldn't apply the umask to mode bits. We will do |
1049 | * so ourselves when necessary. | |
1050 | */ | |
1751e8a6 | 1051 | sb->s_flags |= SB_POSIXACL; |
54ceac45 | 1052 | sb->s_time_gran = 1; |
20fa1902 | 1053 | sb->s_export_op = &nfs_export_ops; |
1fcb79c1 DD |
1054 | } else |
1055 | sb->s_time_gran = 1000; | |
1056 | ||
1057 | if (server->nfs_client->rpc_ops->version != 4) { | |
1058 | sb->s_time_min = 0; | |
1059 | sb->s_time_max = U32_MAX; | |
1060 | } else { | |
1061 | sb->s_time_min = S64_MIN; | |
1062 | sb->s_time_max = S64_MAX; | |
816724e6 | 1063 | } |
54ceac45 | 1064 | |
ab88dca3 | 1065 | sb->s_magic = NFS_SUPER_MAGIC; |
f7b422b1 | 1066 | |
ab88dca3 AV |
1067 | /* We probably want something more informative here */ |
1068 | snprintf(sb->s_id, sizeof(sb->s_id), | |
1069 | "%u:%u", MAJOR(sb->s_dev), MINOR(sb->s_dev)); | |
1fcb79c1 | 1070 | |
ab88dca3 AV |
1071 | if (sb->s_blocksize == 0) |
1072 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
1073 | &sb->s_blocksize_bits); | |
f7b422b1 | 1074 | |
ab88dca3 | 1075 | nfs_super_set_maxbytes(sb, server->maxfilesize); |
ec1ade6a | 1076 | server->has_sec_mnt_opts = ctx->has_sec_mnt_opts; |
f7b422b1 DH |
1077 | } |
1078 | ||
62a55d08 SM |
1079 | static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, |
1080 | const struct fs_context *fc) | |
275a5d24 TM |
1081 | { |
1082 | const struct nfs_server *a = s->s_fs_info; | |
1083 | const struct rpc_clnt *clnt_a = a->client; | |
1084 | const struct rpc_clnt *clnt_b = b->client; | |
1085 | ||
62a55d08 | 1086 | if ((s->s_flags & NFS_SB_MASK) != (fc->sb_flags & NFS_SB_MASK)) |
275a5d24 TM |
1087 | goto Ebusy; |
1088 | if (a->nfs_client != b->nfs_client) | |
1089 | goto Ebusy; | |
0aea92bf | 1090 | if ((a->flags ^ b->flags) & NFS_MOUNT_CMP_FLAGMASK) |
275a5d24 TM |
1091 | goto Ebusy; |
1092 | if (a->wsize != b->wsize) | |
1093 | goto Ebusy; | |
1094 | if (a->rsize != b->rsize) | |
1095 | goto Ebusy; | |
1096 | if (a->acregmin != b->acregmin) | |
1097 | goto Ebusy; | |
1098 | if (a->acregmax != b->acregmax) | |
1099 | goto Ebusy; | |
1100 | if (a->acdirmin != b->acdirmin) | |
1101 | goto Ebusy; | |
1102 | if (a->acdirmax != b->acdirmax) | |
1103 | goto Ebusy; | |
594d1644 | 1104 | if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) |
275a5d24 | 1105 | goto Ebusy; |
e89a5a43 | 1106 | return 1; |
275a5d24 | 1107 | Ebusy: |
e89a5a43 TM |
1108 | return 0; |
1109 | } | |
1110 | ||
f2aedb71 | 1111 | static int nfs_set_super(struct super_block *s, struct fs_context *fc) |
e89a5a43 | 1112 | { |
f2aedb71 | 1113 | struct nfs_server *server = fc->s_fs_info; |
e89a5a43 TM |
1114 | int ret; |
1115 | ||
8b244ff2 | 1116 | s->s_d_op = server->nfs_client->rpc_ops->dentry_ops; |
e89a5a43 TM |
1117 | ret = set_anon_super(s, server); |
1118 | if (ret == 0) | |
1119 | server->s_dev = s->s_dev; | |
1120 | return ret; | |
1121 | } | |
1122 | ||
fd00a8ff CL |
1123 | static int nfs_compare_super_address(struct nfs_server *server1, |
1124 | struct nfs_server *server2) | |
1125 | { | |
1126 | struct sockaddr *sap1, *sap2; | |
7e3fcf61 BF |
1127 | struct rpc_xprt *xprt1 = server1->client->cl_xprt; |
1128 | struct rpc_xprt *xprt2 = server2->client->cl_xprt; | |
1129 | ||
1130 | if (!net_eq(xprt1->xprt_net, xprt2->xprt_net)) | |
1131 | return 0; | |
fd00a8ff CL |
1132 | |
1133 | sap1 = (struct sockaddr *)&server1->nfs_client->cl_addr; | |
1134 | sap2 = (struct sockaddr *)&server2->nfs_client->cl_addr; | |
1135 | ||
1136 | if (sap1->sa_family != sap2->sa_family) | |
1137 | return 0; | |
1138 | ||
1139 | switch (sap1->sa_family) { | |
1140 | case AF_INET: { | |
1141 | struct sockaddr_in *sin1 = (struct sockaddr_in *)sap1; | |
1142 | struct sockaddr_in *sin2 = (struct sockaddr_in *)sap2; | |
1143 | if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) | |
1144 | return 0; | |
1145 | if (sin1->sin_port != sin2->sin_port) | |
1146 | return 0; | |
1147 | break; | |
1148 | } | |
1149 | case AF_INET6: { | |
1150 | struct sockaddr_in6 *sin1 = (struct sockaddr_in6 *)sap1; | |
1151 | struct sockaddr_in6 *sin2 = (struct sockaddr_in6 *)sap2; | |
1152 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) | |
1153 | return 0; | |
1154 | if (sin1->sin6_port != sin2->sin6_port) | |
1155 | return 0; | |
1156 | break; | |
1157 | } | |
1158 | default: | |
1159 | return 0; | |
1160 | } | |
1161 | ||
1162 | return 1; | |
1163 | } | |
1164 | ||
3b7eb5e3 TM |
1165 | static int nfs_compare_userns(const struct nfs_server *old, |
1166 | const struct nfs_server *new) | |
1167 | { | |
1168 | const struct user_namespace *oldns = &init_user_ns; | |
1169 | const struct user_namespace *newns = &init_user_ns; | |
1170 | ||
1171 | if (old->client && old->client->cl_cred) | |
1172 | oldns = old->client->cl_cred->user_ns; | |
1173 | if (new->client && new->client->cl_cred) | |
1174 | newns = new->client->cl_cred->user_ns; | |
1175 | if (oldns != newns) | |
1176 | return 0; | |
1177 | return 1; | |
1178 | } | |
1179 | ||
f2aedb71 | 1180 | static int nfs_compare_super(struct super_block *sb, struct fs_context *fc) |
e89a5a43 | 1181 | { |
f2aedb71 | 1182 | struct nfs_server *server = fc->s_fs_info, *old = NFS_SB(sb); |
e89a5a43 | 1183 | |
fd00a8ff | 1184 | if (!nfs_compare_super_address(old, server)) |
e89a5a43 TM |
1185 | return 0; |
1186 | /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */ | |
1187 | if (old->flags & NFS_MOUNT_UNSHARED) | |
1188 | return 0; | |
1189 | if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0) | |
1190 | return 0; | |
3b7eb5e3 TM |
1191 | if (!nfs_compare_userns(old, server)) |
1192 | return 0; | |
ec1ade6a OK |
1193 | if ((old->has_sec_mnt_opts || fc->security) && |
1194 | security_sb_mnt_opts_compat(sb, fc->security)) | |
1195 | return 0; | |
62a55d08 | 1196 | return nfs_compare_mount_options(sb, server, fc); |
275a5d24 TM |
1197 | } |
1198 | ||
39ffb921 | 1199 | #ifdef CONFIG_NFS_FSCACHE |
2311b943 | 1200 | static void nfs_get_cache_cookie(struct super_block *sb, |
f2aedb71 | 1201 | struct nfs_fs_context *ctx) |
2311b943 | 1202 | { |
c4271c6e | 1203 | struct nfs_server *nfss = NFS_SB(sb); |
2311b943 BS |
1204 | char *uniq = NULL; |
1205 | int ulen = 0; | |
1206 | ||
c4271c6e TM |
1207 | nfss->fscache_key = NULL; |
1208 | nfss->fscache = NULL; | |
1209 | ||
f2aedb71 DH |
1210 | if (!ctx) |
1211 | return; | |
1212 | ||
1213 | if (ctx->clone_data.sb) { | |
1214 | struct nfs_server *mnt_s = NFS_SB(ctx->clone_data.sb); | |
c4271c6e TM |
1215 | if (!(mnt_s->options & NFS_OPTION_FSCACHE)) |
1216 | return; | |
2311b943 BS |
1217 | if (mnt_s->fscache_key) { |
1218 | uniq = mnt_s->fscache_key->key.uniquifier; | |
1219 | ulen = mnt_s->fscache_key->key.uniq_len; | |
9c91fa36 | 1220 | } |
f2aedb71 DH |
1221 | } else { |
1222 | if (!(ctx->options & NFS_OPTION_FSCACHE)) | |
1223 | return; | |
1224 | if (ctx->fscache_uniq) { | |
1225 | uniq = ctx->fscache_uniq; | |
1226 | ulen = strlen(ctx->fscache_uniq); | |
1227 | } | |
f2aedb71 | 1228 | } |
2311b943 BS |
1229 | |
1230 | nfs_fscache_get_super_cookie(sb, uniq, ulen); | |
1231 | } | |
39ffb921 TM |
1232 | #else |
1233 | static void nfs_get_cache_cookie(struct super_block *sb, | |
f2aedb71 | 1234 | struct nfs_fs_context *ctx) |
39ffb921 TM |
1235 | { |
1236 | } | |
1237 | #endif | |
2311b943 | 1238 | |
f2aedb71 | 1239 | int nfs_get_tree_common(struct fs_context *fc) |
f7b422b1 | 1240 | { |
f2aedb71 | 1241 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
f7b422b1 | 1242 | struct super_block *s; |
f2aedb71 | 1243 | int (*compare_super)(struct super_block *, struct fs_context *) = nfs_compare_super; |
62a55d08 | 1244 | struct nfs_server *server = ctx->server; |
01194981 | 1245 | int error; |
33852a1f | 1246 | |
62a55d08 | 1247 | ctx->server = NULL; |
444a5296 | 1248 | if (IS_ERR(server)) |
f2aedb71 | 1249 | return PTR_ERR(server); |
444a5296 | 1250 | |
75180df2 TM |
1251 | if (server->flags & NFS_MOUNT_UNSHARED) |
1252 | compare_super = NULL; | |
1253 | ||
fb2088cc SP |
1254 | /* -o noac implies -o sync */ |
1255 | if (server->flags & NFS_MOUNT_NOAC) | |
f2aedb71 DH |
1256 | fc->sb_flags |= SB_SYNCHRONOUS; |
1257 | ||
1258 | if (ctx->clone_data.sb) | |
1259 | if (ctx->clone_data.sb->s_flags & SB_SYNCHRONOUS) | |
1260 | fc->sb_flags |= SB_SYNCHRONOUS; | |
fb2088cc | 1261 | |
f2aedb71 DH |
1262 | if (server->caps & NFS_CAP_SECURITY_LABEL) |
1263 | fc->lsm_flags |= SECURITY_LSM_NATIVE_LABELS; | |
e890db01 | 1264 | |
54ceac45 | 1265 | /* Get a superblock - note that we may end up sharing one that already exists */ |
f2aedb71 DH |
1266 | fc->s_fs_info = server; |
1267 | s = sget_fc(fc, compare_super, nfs_set_super); | |
1268 | fc->s_fs_info = NULL; | |
816724e6 | 1269 | if (IS_ERR(s)) { |
f2aedb71 | 1270 | error = PTR_ERR(s); |
ce8866f0 | 1271 | nfs_errorf(fc, "NFS: Couldn't get superblock"); |
54ceac45 | 1272 | goto out_err_nosb; |
816724e6 TM |
1273 | } |
1274 | ||
54ceac45 DH |
1275 | if (s->s_fs_info != server) { |
1276 | nfs_free_server(server); | |
1277 | server = NULL; | |
fa799759 | 1278 | } else { |
9052c7cf JK |
1279 | error = super_setup_bdi_name(s, "%u:%u", MAJOR(server->s_dev), |
1280 | MINOR(server->s_dev)); | |
f2aedb71 | 1281 | if (error) |
9052c7cf | 1282 | goto error_splat_super; |
55b2598e | 1283 | s->s_bdi->io_pages = server->rpages; |
ce6cda18 | 1284 | server->super = s; |
54ceac45 | 1285 | } |
f7b422b1 | 1286 | |
54ceac45 | 1287 | if (!s->s_root) { |
62a55d08 | 1288 | unsigned bsize = ctx->clone_data.inherited_bsize; |
54ceac45 | 1289 | /* initial superblock/root creation */ |
62a55d08 | 1290 | nfs_fill_super(s, ctx); |
ab88dca3 AV |
1291 | if (bsize) { |
1292 | s->s_blocksize_bits = bsize; | |
1293 | s->s_blocksize = 1U << bsize; | |
1294 | } | |
f2aedb71 | 1295 | nfs_get_cache_cookie(s, ctx); |
54ceac45 | 1296 | } |
f7b422b1 | 1297 | |
62a55d08 SM |
1298 | error = nfs_get_root(s, fc); |
1299 | if (error < 0) { | |
ce8866f0 | 1300 | nfs_errorf(fc, "NFS: Couldn't get root dentry"); |
54ceac45 | 1301 | goto error_splat_super; |
f2aedb71 | 1302 | } |
adf2314f | 1303 | |
1751e8a6 | 1304 | s->s_flags |= SB_ACTIVE; |
f2aedb71 | 1305 | error = 0; |
0655960f CL |
1306 | |
1307 | out: | |
f2aedb71 | 1308 | return error; |
816724e6 | 1309 | |
54ceac45 DH |
1310 | out_err_nosb: |
1311 | nfs_free_server(server); | |
0655960f | 1312 | goto out; |
54ceac45 | 1313 | error_splat_super: |
6f5bbff9 | 1314 | deactivate_locked_super(s); |
0655960f | 1315 | goto out; |
f7b422b1 DH |
1316 | } |
1317 | ||
54ceac45 DH |
1318 | /* |
1319 | * Destroy an NFS2/3 superblock | |
1320 | */ | |
fbdefd64 | 1321 | void nfs_kill_super(struct super_block *s) |
f7b422b1 DH |
1322 | { |
1323 | struct nfs_server *server = NFS_SB(s); | |
7b14a213 CH |
1324 | dev_t dev = s->s_dev; |
1325 | ||
1326 | generic_shutdown_super(s); | |
f7b422b1 | 1327 | |
08734048 | 1328 | nfs_fscache_release_super_cookie(s); |
7b14a213 | 1329 | |
54ceac45 | 1330 | nfs_free_server(server); |
7b14a213 | 1331 | free_anon_bdev(dev); |
f7b422b1 | 1332 | } |
89d77c8f | 1333 | EXPORT_SYMBOL_GPL(nfs_kill_super); |
f7b422b1 | 1334 | |
89d77c8f | 1335 | #if IS_ENABLED(CONFIG_NFS_V4) |
54ceac45 | 1336 | |
fac1e8e4 BS |
1337 | /* |
1338 | * NFS v4 module parameters need to stay in the | |
1339 | * NFS client for backwards compatibility | |
1340 | */ | |
1341 | unsigned int nfs_callback_set_tcpport; | |
5405fc44 | 1342 | unsigned short nfs_callback_nr_threads; |
fac1e8e4 BS |
1343 | /* Default cache timeout is 10 minutes */ |
1344 | unsigned int nfs_idmap_cache_timeout = 600; | |
1345 | /* Turn off NFSv4 uid/gid mapping when using AUTH_SYS */ | |
1346 | bool nfs4_disable_idmapping = true; | |
1347 | unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE; | |
5405fc44 | 1348 | unsigned short max_session_cb_slots = NFS4_DEF_CB_SLOT_TABLE_SIZE; |
fac1e8e4 | 1349 | unsigned short send_implementation_id = 1; |
6f2ea7f2 | 1350 | char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN] = ""; |
f6de7a39 | 1351 | bool recover_lost_locks = false; |
fac1e8e4 | 1352 | |
5405fc44 | 1353 | EXPORT_SYMBOL_GPL(nfs_callback_nr_threads); |
89d77c8f | 1354 | EXPORT_SYMBOL_GPL(nfs_callback_set_tcpport); |
89d77c8f BS |
1355 | EXPORT_SYMBOL_GPL(nfs_idmap_cache_timeout); |
1356 | EXPORT_SYMBOL_GPL(nfs4_disable_idmapping); | |
1357 | EXPORT_SYMBOL_GPL(max_session_slots); | |
5405fc44 | 1358 | EXPORT_SYMBOL_GPL(max_session_cb_slots); |
89d77c8f | 1359 | EXPORT_SYMBOL_GPL(send_implementation_id); |
6f2ea7f2 | 1360 | EXPORT_SYMBOL_GPL(nfs4_client_id_uniquifier); |
f6de7a39 | 1361 | EXPORT_SYMBOL_GPL(recover_lost_locks); |
89d77c8f | 1362 | |
fac1e8e4 BS |
1363 | #define NFS_CALLBACK_MAXPORTNR (65535U) |
1364 | ||
1365 | static int param_set_portnr(const char *val, const struct kernel_param *kp) | |
1366 | { | |
1367 | unsigned long num; | |
1368 | int ret; | |
1369 | ||
1370 | if (!val) | |
1371 | return -EINVAL; | |
7297cb68 | 1372 | ret = kstrtoul(val, 0, &num); |
379ebf07 | 1373 | if (ret || num > NFS_CALLBACK_MAXPORTNR) |
fac1e8e4 BS |
1374 | return -EINVAL; |
1375 | *((unsigned int *)kp->arg) = num; | |
1376 | return 0; | |
1377 | } | |
9c27847d | 1378 | static const struct kernel_param_ops param_ops_portnr = { |
fac1e8e4 BS |
1379 | .set = param_set_portnr, |
1380 | .get = param_get_uint, | |
1381 | }; | |
a799b68a | 1382 | #define param_check_portnr(name, p) __param_check(name, p, unsigned int) |
fac1e8e4 BS |
1383 | |
1384 | module_param_named(callback_tcpport, nfs_callback_set_tcpport, portnr, 0644); | |
5405fc44 TM |
1385 | module_param_named(callback_nr_threads, nfs_callback_nr_threads, ushort, 0644); |
1386 | MODULE_PARM_DESC(callback_nr_threads, "Number of threads that will be " | |
1387 | "assigned to the NFSv4 callback channels."); | |
fac1e8e4 BS |
1388 | module_param(nfs_idmap_cache_timeout, int, 0644); |
1389 | module_param(nfs4_disable_idmapping, bool, 0644); | |
6f2ea7f2 CL |
1390 | module_param_string(nfs4_unique_id, nfs4_client_id_uniquifier, |
1391 | NFS4_CLIENT_ID_UNIQ_LEN, 0600); | |
fac1e8e4 BS |
1392 | MODULE_PARM_DESC(nfs4_disable_idmapping, |
1393 | "Turn off NFSv4 idmapping when using 'sec=sys'"); | |
1394 | module_param(max_session_slots, ushort, 0644); | |
1395 | MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 " | |
1396 | "requests the client will negotiate"); | |
5405fc44 | 1397 | module_param(max_session_cb_slots, ushort, 0644); |
f36ab161 | 1398 | MODULE_PARM_DESC(max_session_cb_slots, "Maximum number of parallel NFSv4.1 " |
5405fc44 | 1399 | "callbacks the client will process for a given server"); |
fac1e8e4 BS |
1400 | module_param(send_implementation_id, ushort, 0644); |
1401 | MODULE_PARM_DESC(send_implementation_id, | |
1402 | "Send implementation ID with NFSv4.1 exchange_id"); | |
6f2ea7f2 | 1403 | MODULE_PARM_DESC(nfs4_unique_id, "nfs_client_id4 uniquifier string"); |
425e776d | 1404 | |
f6de7a39 TM |
1405 | module_param(recover_lost_locks, bool, 0644); |
1406 | MODULE_PARM_DESC(recover_lost_locks, | |
1407 | "If the server reports that a lock might be lost, " | |
1408 | "try to recover it risking data corruption."); | |
1409 | ||
1410 | ||
54ceac45 | 1411 | #endif /* CONFIG_NFS_V4 */ |