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 | 61 | |
c8407f2e CL |
62 | #include <uapi/linux/tls.h> |
63 | ||
f7b422b1 DH |
64 | #include "nfs4_fs.h" |
65 | #include "callback.h" | |
66 | #include "delegation.h" | |
67 | #include "iostat.h" | |
68 | #include "internal.h" | |
08734048 | 69 | #include "fscache.h" |
76e697ba | 70 | #include "nfs4session.h" |
ae50c0b5 | 71 | #include "pnfs.h" |
ab7017a3 | 72 | #include "nfs.h" |
1c725118 BC |
73 | #include "netns.h" |
74 | #include "sysfs.h" | |
f7b422b1 DH |
75 | |
76 | #define NFSDBG_FACILITY NFSDBG_VFS | |
bf0fd768 | 77 | |
6a74490d | 78 | const struct super_operations nfs_sops = { |
f7b422b1 | 79 | .alloc_inode = nfs_alloc_inode, |
ca1a199e | 80 | .free_inode = nfs_free_inode, |
f7b422b1 | 81 | .write_inode = nfs_write_inode, |
eed99357 | 82 | .drop_inode = nfs_drop_inode, |
f7b422b1 | 83 | .statfs = nfs_statfs, |
b57922d9 | 84 | .evict_inode = nfs_evict_inode, |
f7b422b1 DH |
85 | .umount_begin = nfs_umount_begin, |
86 | .show_options = nfs_show_options, | |
c7f404b4 AV |
87 | .show_devname = nfs_show_devname, |
88 | .show_path = nfs_show_path, | |
f7b422b1 DH |
89 | .show_stats = nfs_show_stats, |
90 | }; | |
ddda8e0a | 91 | EXPORT_SYMBOL_GPL(nfs_sops); |
f7b422b1 | 92 | |
02591f9f | 93 | #ifdef CONFIG_NFS_V4_2 |
0cfcd405 DN |
94 | static const struct nfs_ssc_client_ops nfs_ssc_clnt_ops_tbl = { |
95 | .sco_sb_deactive = nfs_sb_deactive, | |
96 | }; | |
02591f9f | 97 | #endif |
0cfcd405 | 98 | |
89d77c8f | 99 | #if IS_ENABLED(CONFIG_NFS_V4) |
1ae811ee | 100 | static int __init register_nfs4_fs(void) |
101 | { | |
102 | return register_filesystem(&nfs4_fs_type); | |
103 | } | |
104 | ||
105 | static void unregister_nfs4_fs(void) | |
106 | { | |
107 | unregister_filesystem(&nfs4_fs_type); | |
108 | } | |
109 | #else | |
110 | static int __init register_nfs4_fs(void) | |
111 | { | |
112 | return 0; | |
113 | } | |
114 | ||
115 | static void unregister_nfs4_fs(void) | |
116 | { | |
117 | } | |
f7b422b1 DH |
118 | #endif |
119 | ||
02591f9f | 120 | #ifdef CONFIG_NFS_V4_2 |
0cfcd405 DN |
121 | static void nfs_ssc_register_ops(void) |
122 | { | |
123 | nfs_ssc_register(&nfs_ssc_clnt_ops_tbl); | |
124 | } | |
125 | ||
126 | static void nfs_ssc_unregister_ops(void) | |
127 | { | |
128 | nfs_ssc_unregister(&nfs_ssc_clnt_ops_tbl); | |
129 | } | |
02591f9f | 130 | #endif /* CONFIG_NFS_V4_2 */ |
0cfcd405 | 131 | |
777fc8f1 | 132 | static struct shrinker *acl_shrinker; |
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; | |
777fc8f1 QZ |
152 | |
153 | acl_shrinker = shrinker_alloc(0, "nfs-acl"); | |
154 | if (!acl_shrinker) { | |
155 | ret = -ENOMEM; | |
5ef8d792 | 156 | goto error_3; |
777fc8f1 QZ |
157 | } |
158 | ||
159 | acl_shrinker->count_objects = nfs_access_cache_count; | |
160 | acl_shrinker->scan_objects = nfs_access_cache_scan; | |
161 | ||
162 | shrinker_register(acl_shrinker); | |
163 | ||
02591f9f | 164 | #ifdef CONFIG_NFS_V4_2 |
0cfcd405 | 165 | nfs_ssc_register_ops(); |
02591f9f | 166 | #endif |
f7b422b1 | 167 | return 0; |
5ef8d792 KM |
168 | error_3: |
169 | nfs_unregister_sysctl(); | |
1ae811ee | 170 | error_2: |
171 | unregister_nfs4_fs(); | |
f7b422b1 DH |
172 | error_1: |
173 | unregister_filesystem(&nfs_fs_type); | |
f7b422b1 DH |
174 | error_0: |
175 | return ret; | |
176 | } | |
177 | ||
178 | /* | |
179 | * Unregister the NFS filesystems | |
180 | */ | |
181 | void __exit unregister_nfs_fs(void) | |
182 | { | |
777fc8f1 | 183 | shrinker_free(acl_shrinker); |
49af7ee1 | 184 | nfs_unregister_sysctl(); |
1ae811ee | 185 | unregister_nfs4_fs(); |
02591f9f | 186 | #ifdef CONFIG_NFS_V4_2 |
0cfcd405 | 187 | nfs_ssc_unregister_ops(); |
02591f9f | 188 | #endif |
f7b422b1 DH |
189 | unregister_filesystem(&nfs_fs_type); |
190 | } | |
191 | ||
ea7c38fe | 192 | bool nfs_sb_active(struct super_block *sb) |
ef818a28 | 193 | { |
1daef0a8 | 194 | struct nfs_server *server = NFS_SB(sb); |
ef818a28 | 195 | |
ea7c38fe TM |
196 | if (!atomic_inc_not_zero(&sb->s_active)) |
197 | return false; | |
198 | if (atomic_inc_return(&server->active) != 1) | |
199 | atomic_dec(&sb->s_active); | |
200 | return true; | |
ef818a28 | 201 | } |
89d77c8f | 202 | EXPORT_SYMBOL_GPL(nfs_sb_active); |
ef818a28 | 203 | |
1daef0a8 | 204 | void nfs_sb_deactive(struct super_block *sb) |
ef818a28 SD |
205 | { |
206 | struct nfs_server *server = NFS_SB(sb); | |
1daef0a8 TM |
207 | |
208 | if (atomic_dec_and_test(&server->active)) | |
209 | deactivate_super(sb); | |
ef818a28 | 210 | } |
89d77c8f | 211 | EXPORT_SYMBOL_GPL(nfs_sb_deactive); |
ef818a28 | 212 | |
3c9e502b TM |
213 | static int __nfs_list_for_each_server(struct list_head *head, |
214 | int (*fn)(struct nfs_server *, void *), | |
215 | void *data) | |
216 | { | |
217 | struct nfs_server *server, *last = NULL; | |
218 | int ret = 0; | |
219 | ||
220 | rcu_read_lock(); | |
221 | list_for_each_entry_rcu(server, head, client_link) { | |
9c07b75b | 222 | if (!(server->super && nfs_sb_active(server->super))) |
3c9e502b TM |
223 | continue; |
224 | rcu_read_unlock(); | |
225 | if (last) | |
226 | nfs_sb_deactive(last->super); | |
227 | last = server; | |
228 | ret = fn(server, data); | |
229 | if (ret) | |
230 | goto out; | |
231 | rcu_read_lock(); | |
232 | } | |
233 | rcu_read_unlock(); | |
234 | out: | |
235 | if (last) | |
236 | nfs_sb_deactive(last->super); | |
237 | return ret; | |
238 | } | |
239 | ||
240 | int nfs_client_for_each_server(struct nfs_client *clp, | |
241 | int (*fn)(struct nfs_server *, void *), | |
242 | void *data) | |
243 | { | |
244 | return __nfs_list_for_each_server(&clp->cl_superblocks, fn, data); | |
245 | } | |
246 | EXPORT_SYMBOL_GPL(nfs_client_for_each_server); | |
247 | ||
f7b422b1 DH |
248 | /* |
249 | * Deliver file system statistics to userspace | |
250 | */ | |
fbdefd64 | 251 | int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
f7b422b1 | 252 | { |
0c7d90cf | 253 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
f7b422b1 DH |
254 | unsigned char blockbits; |
255 | unsigned long blockres; | |
2b0143b5 | 256 | struct nfs_fh *fh = NFS_FH(d_inode(dentry)); |
ca7e9a0d TM |
257 | struct nfs_fsstat res; |
258 | int error = -ENOMEM; | |
259 | ||
260 | res.fattr = nfs_alloc_fattr(); | |
261 | if (res.fattr == NULL) | |
262 | goto out_err; | |
f7b422b1 | 263 | |
8fa5c000 | 264 | error = server->nfs_client->rpc_ops->statfs(server, fh, &res); |
fbf3fdd2 MZ |
265 | if (unlikely(error == -ESTALE)) { |
266 | struct dentry *pd_dentry; | |
267 | ||
268 | pd_dentry = dget_parent(dentry); | |
1cfb7072 AV |
269 | nfs_zap_caches(d_inode(pd_dentry)); |
270 | dput(pd_dentry); | |
fbf3fdd2 | 271 | } |
ca7e9a0d | 272 | nfs_free_fattr(res.fattr); |
f7b422b1 DH |
273 | if (error < 0) |
274 | goto out_err; | |
ca7e9a0d | 275 | |
1a0ba9ae | 276 | buf->f_type = NFS_SUPER_MAGIC; |
f7b422b1 DH |
277 | |
278 | /* | |
279 | * Current versions of glibc do not correctly handle the | |
280 | * case where f_frsize != f_bsize. Eventually we want to | |
281 | * report the value of wtmult in this field. | |
282 | */ | |
0c7d90cf | 283 | buf->f_frsize = dentry->d_sb->s_blocksize; |
f7b422b1 DH |
284 | |
285 | /* | |
286 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
287 | * are reported in units of f_frsize. Linux hasn't had | |
288 | * an f_frsize field in its statfs struct until recently, | |
289 | * thus historically Linux's sys_statfs reports these | |
290 | * fields in units of f_bsize. | |
291 | */ | |
0c7d90cf DH |
292 | buf->f_bsize = dentry->d_sb->s_blocksize; |
293 | blockbits = dentry->d_sb->s_blocksize_bits; | |
f7b422b1 DH |
294 | blockres = (1 << blockbits) - 1; |
295 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
296 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
297 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
298 | ||
299 | buf->f_files = res.tfiles; | |
300 | buf->f_ffree = res.afiles; | |
301 | ||
302 | buf->f_namelen = server->namelen; | |
1a0ba9ae | 303 | |
f7b422b1 DH |
304 | return 0; |
305 | ||
306 | out_err: | |
3110ff80 | 307 | dprintk("%s: statfs error = %d\n", __func__, -error); |
1a0ba9ae | 308 | return error; |
f7b422b1 | 309 | } |
89d77c8f | 310 | EXPORT_SYMBOL_GPL(nfs_statfs); |
f7b422b1 | 311 | |
7d4e2747 DH |
312 | /* |
313 | * Map the security flavour number to a name | |
314 | */ | |
81039f1f TM |
315 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
316 | { | |
7d4e2747 | 317 | static const struct { |
81039f1f TM |
318 | rpc_authflavor_t flavour; |
319 | const char *str; | |
4d4b69dd WAA |
320 | } sec_flavours[NFS_AUTH_INFO_MAX_FLAVORS] = { |
321 | /* update NFS_AUTH_INFO_MAX_FLAVORS when this list changes! */ | |
81039f1f TM |
322 | { RPC_AUTH_NULL, "null" }, |
323 | { RPC_AUTH_UNIX, "sys" }, | |
324 | { RPC_AUTH_GSS_KRB5, "krb5" }, | |
325 | { RPC_AUTH_GSS_KRB5I, "krb5i" }, | |
326 | { RPC_AUTH_GSS_KRB5P, "krb5p" }, | |
327 | { RPC_AUTH_GSS_LKEY, "lkey" }, | |
328 | { RPC_AUTH_GSS_LKEYI, "lkeyi" }, | |
329 | { RPC_AUTH_GSS_LKEYP, "lkeyp" }, | |
330 | { RPC_AUTH_GSS_SPKM, "spkm" }, | |
331 | { RPC_AUTH_GSS_SPKMI, "spkmi" }, | |
332 | { RPC_AUTH_GSS_SPKMP, "spkmp" }, | |
4d81cd16 | 333 | { UINT_MAX, "unknown" } |
81039f1f TM |
334 | }; |
335 | int i; | |
336 | ||
4d81cd16 | 337 | for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) { |
81039f1f TM |
338 | if (sec_flavours[i].flavour == flavour) |
339 | break; | |
340 | } | |
341 | return sec_flavours[i].str; | |
342 | } | |
343 | ||
ee671b01 JL |
344 | static void nfs_show_mountd_netid(struct seq_file *m, struct nfs_server *nfss, |
345 | int showdefaults) | |
346 | { | |
347 | struct sockaddr *sap = (struct sockaddr *) &nfss->mountd_address; | |
6f6e3c09 | 348 | char *proto = NULL; |
ee671b01 | 349 | |
ee671b01 JL |
350 | switch (sap->sa_family) { |
351 | case AF_INET: | |
352 | switch (nfss->mountd_protocol) { | |
353 | case IPPROTO_UDP: | |
6f6e3c09 | 354 | proto = RPCBIND_NETID_UDP; |
ee671b01 JL |
355 | break; |
356 | case IPPROTO_TCP: | |
6f6e3c09 | 357 | proto = RPCBIND_NETID_TCP; |
ee671b01 | 358 | break; |
ee671b01 JL |
359 | } |
360 | break; | |
361 | case AF_INET6: | |
362 | switch (nfss->mountd_protocol) { | |
363 | case IPPROTO_UDP: | |
6f6e3c09 | 364 | proto = RPCBIND_NETID_UDP6; |
ee671b01 JL |
365 | break; |
366 | case IPPROTO_TCP: | |
6f6e3c09 | 367 | proto = RPCBIND_NETID_TCP6; |
ee671b01 | 368 | break; |
ee671b01 JL |
369 | } |
370 | break; | |
ee671b01 | 371 | } |
6f6e3c09 N |
372 | if (proto || showdefaults) |
373 | seq_printf(m, ",mountproto=%s", proto ?: "auto"); | |
ee671b01 JL |
374 | } |
375 | ||
82d101d5 CL |
376 | static void nfs_show_mountd_options(struct seq_file *m, struct nfs_server *nfss, |
377 | int showdefaults) | |
378 | { | |
379 | struct sockaddr *sap = (struct sockaddr *)&nfss->mountd_address; | |
380 | ||
d5eff1a3 BS |
381 | if (nfss->flags & NFS_MOUNT_LEGACY_INTERFACE) |
382 | return; | |
383 | ||
82d101d5 CL |
384 | switch (sap->sa_family) { |
385 | case AF_INET: { | |
386 | struct sockaddr_in *sin = (struct sockaddr_in *)sap; | |
be859405 | 387 | seq_printf(m, ",mountaddr=%pI4", &sin->sin_addr.s_addr); |
82d101d5 CL |
388 | break; |
389 | } | |
390 | case AF_INET6: { | |
391 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
d250e190 | 392 | seq_printf(m, ",mountaddr=%pI6c", &sin6->sin6_addr); |
82d101d5 CL |
393 | break; |
394 | } | |
395 | default: | |
396 | if (showdefaults) | |
1c316e39 | 397 | seq_puts(m, ",mountaddr=unspecified"); |
82d101d5 CL |
398 | } |
399 | ||
400 | if (nfss->mountd_version || showdefaults) | |
401 | seq_printf(m, ",mountvers=%u", nfss->mountd_version); | |
aa699473 SK |
402 | if ((nfss->mountd_port && |
403 | nfss->mountd_port != (unsigned short)NFS_UNSPEC_PORT) || | |
404 | showdefaults) | |
82d101d5 CL |
405 | seq_printf(m, ",mountport=%u", nfss->mountd_port); |
406 | ||
ee671b01 | 407 | nfs_show_mountd_netid(m, nfss, showdefaults); |
82d101d5 CL |
408 | } |
409 | ||
89d77c8f | 410 | #if IS_ENABLED(CONFIG_NFS_V4) |
0be8189f TM |
411 | static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss, |
412 | int showdefaults) | |
413 | { | |
414 | struct nfs_client *clp = nfss->nfs_client; | |
415 | ||
416 | seq_printf(m, ",clientaddr=%s", clp->cl_ipaddr); | |
0be8189f TM |
417 | } |
418 | #else | |
419 | static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss, | |
420 | int showdefaults) | |
421 | { | |
422 | } | |
423 | #endif | |
424 | ||
7bbceb6f TM |
425 | static void nfs_show_nfs_version(struct seq_file *m, |
426 | unsigned int version, | |
427 | unsigned int minorversion) | |
428 | { | |
429 | seq_printf(m, ",vers=%u", version); | |
430 | if (version == 4) | |
431 | seq_printf(m, ".%u", minorversion); | |
432 | } | |
433 | ||
f7b422b1 DH |
434 | /* |
435 | * Describe the mount options in force on this server representation | |
436 | */ | |
82d101d5 CL |
437 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, |
438 | int showdefaults) | |
f7b422b1 | 439 | { |
509de811 | 440 | static const struct proc_nfs_info { |
f7b422b1 | 441 | int flag; |
509de811 DH |
442 | const char *str; |
443 | const char *nostr; | |
f7b422b1 | 444 | } nfs_info[] = { |
91a575e1 TM |
445 | { NFS_MOUNT_SOFT, ",soft", "" }, |
446 | { NFS_MOUNT_SOFTERR, ",softerr", "" }, | |
c74dfe97 | 447 | { NFS_MOUNT_SOFTREVAL, ",softreval", "" }, |
82d101d5 | 448 | { NFS_MOUNT_POSIX, ",posix", "" }, |
f7b422b1 DH |
449 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
450 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
451 | { NFS_MOUNT_NONLM, ",nolock", "" }, | |
452 | { NFS_MOUNT_NOACL, ",noacl", "" }, | |
74dd34e6 | 453 | { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" }, |
d740351b CL |
454 | { NFS_MOUNT_UNSHARED, ",nosharecache", "" }, |
455 | { NFS_MOUNT_NORESVPORT, ",noresvport", "" }, | |
f7b422b1 DH |
456 | { 0, NULL, NULL } |
457 | }; | |
509de811 | 458 | const struct proc_nfs_info *nfs_infop; |
8fa5c000 | 459 | struct nfs_client *clp = nfss->nfs_client; |
82d101d5 | 460 | u32 version = clp->rpc_ops->version; |
7c563cc9 | 461 | int local_flock, local_fcntl; |
f7b422b1 | 462 | |
7bbceb6f | 463 | nfs_show_nfs_version(m, version, clp->cl_minorversion); |
2d767432 CL |
464 | seq_printf(m, ",rsize=%u", nfss->rsize); |
465 | seq_printf(m, ",wsize=%u", nfss->wsize); | |
82d101d5 CL |
466 | if (nfss->bsize != 0) |
467 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
468 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
0e0cab74 | 469 | if (nfss->acregmin != NFS_DEF_ACREGMIN*HZ || showdefaults) |
2d767432 | 470 | seq_printf(m, ",acregmin=%u", nfss->acregmin/HZ); |
0e0cab74 | 471 | if (nfss->acregmax != NFS_DEF_ACREGMAX*HZ || showdefaults) |
2d767432 | 472 | seq_printf(m, ",acregmax=%u", nfss->acregmax/HZ); |
0e0cab74 | 473 | if (nfss->acdirmin != NFS_DEF_ACDIRMIN*HZ || showdefaults) |
2d767432 | 474 | seq_printf(m, ",acdirmin=%u", nfss->acdirmin/HZ); |
0e0cab74 | 475 | if (nfss->acdirmax != NFS_DEF_ACDIRMAX*HZ || showdefaults) |
2d767432 | 476 | seq_printf(m, ",acdirmax=%u", nfss->acdirmax/HZ); |
91a575e1 TM |
477 | if (!(nfss->flags & (NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR))) |
478 | seq_puts(m, ",hard"); | |
f7b422b1 DH |
479 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { |
480 | if (nfss->flags & nfs_infop->flag) | |
481 | seq_puts(m, nfs_infop->str); | |
482 | else | |
483 | seq_puts(m, nfs_infop->nostr); | |
484 | } | |
2446ab60 | 485 | rcu_read_lock(); |
56928edd | 486 | seq_printf(m, ",proto=%s", |
ee671b01 | 487 | rpc_peeraddr2str(nfss->client, RPC_DISPLAY_NETID)); |
2446ab60 | 488 | rcu_read_unlock(); |
fd87c8b7 TM |
489 | if (clp->cl_nconnect > 0) |
490 | seq_printf(m, ",nconnect=%u", clp->cl_nconnect); | |
82d101d5 | 491 | if (version == 4) { |
7e134205 OK |
492 | if (clp->cl_max_connect > 1) |
493 | seq_printf(m, ",max_connect=%u", clp->cl_max_connect); | |
82d101d5 CL |
494 | if (nfss->port != NFS_PORT) |
495 | seq_printf(m, ",port=%u", nfss->port); | |
496 | } else | |
497 | if (nfss->port) | |
498 | seq_printf(m, ",port=%u", nfss->port); | |
499 | ||
33170233 TM |
500 | seq_printf(m, ",timeo=%lu", 10U * nfss->client->cl_timeout->to_initval / HZ); |
501 | seq_printf(m, ",retrans=%u", nfss->client->cl_timeout->to_retries); | |
81039f1f | 502 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
c8407f2e CL |
503 | switch (clp->cl_xprtsec.policy) { |
504 | case RPC_XPRTSEC_TLS_ANON: | |
505 | seq_puts(m, ",xprtsec=tls"); | |
506 | break; | |
507 | case RPC_XPRTSEC_TLS_X509: | |
508 | seq_puts(m, ",xprtsec=mtls"); | |
509 | break; | |
510 | default: | |
511 | break; | |
512 | } | |
82d101d5 CL |
513 | |
514 | if (version != 4) | |
515 | nfs_show_mountd_options(m, nfss, showdefaults); | |
0be8189f TM |
516 | else |
517 | nfs_show_nfsv4_options(m, nfss, showdefaults); | |
82d101d5 | 518 | |
b797cac7 | 519 | if (nfss->options & NFS_OPTION_FSCACHE) |
1c316e39 | 520 | seq_puts(m, ",fsc"); |
9b00c643 | 521 | |
89652617 | 522 | if (nfss->options & NFS_OPTION_MIGRATION) |
1c316e39 | 523 | seq_puts(m, ",migration"); |
89652617 | 524 | |
9b00c643 PL |
525 | if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONEG) { |
526 | if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONE) | |
1c316e39 | 527 | seq_puts(m, ",lookupcache=none"); |
9b00c643 | 528 | else |
1c316e39 | 529 | seq_puts(m, ",lookupcache=pos"); |
9b00c643 | 530 | } |
7c563cc9 SJ |
531 | |
532 | local_flock = nfss->flags & NFS_MOUNT_LOCAL_FLOCK; | |
533 | local_fcntl = nfss->flags & NFS_MOUNT_LOCAL_FCNTL; | |
534 | ||
535 | if (!local_flock && !local_fcntl) | |
1c316e39 | 536 | seq_puts(m, ",local_lock=none"); |
7c563cc9 | 537 | else if (local_flock && local_fcntl) |
1c316e39 | 538 | seq_puts(m, ",local_lock=all"); |
7c563cc9 | 539 | else if (local_flock) |
1c316e39 | 540 | seq_puts(m, ",local_lock=flock"); |
7c563cc9 | 541 | else |
1c316e39 | 542 | seq_puts(m, ",local_lock=posix"); |
7ae017c7 TM |
543 | |
544 | if (nfss->flags & NFS_MOUNT_WRITE_EAGER) { | |
545 | if (nfss->flags & NFS_MOUNT_WRITE_WAIT) | |
546 | seq_puts(m, ",write=wait"); | |
547 | else | |
548 | seq_puts(m, ",write=eager"); | |
549 | } | |
f7b422b1 DH |
550 | } |
551 | ||
552 | /* | |
553 | * Describe the mount options on this VFS mountpoint | |
554 | */ | |
fbdefd64 | 555 | int nfs_show_options(struct seq_file *m, struct dentry *root) |
f7b422b1 | 556 | { |
34c80b1d | 557 | struct nfs_server *nfss = NFS_SB(root->d_sb); |
f7b422b1 DH |
558 | |
559 | nfs_show_mount_options(m, nfss, 0); | |
560 | ||
2446ab60 | 561 | rcu_read_lock(); |
5d8515ca CL |
562 | seq_printf(m, ",addr=%s", |
563 | rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient, | |
564 | RPC_DISPLAY_ADDR)); | |
2446ab60 | 565 | rcu_read_unlock(); |
f7b422b1 DH |
566 | |
567 | return 0; | |
568 | } | |
89d77c8f | 569 | EXPORT_SYMBOL_GPL(nfs_show_options); |
45402c38 | 570 | |
89d77c8f | 571 | #if IS_ENABLED(CONFIG_NFS_V4) |
1a7441b2 DW |
572 | static void show_lease(struct seq_file *m, struct nfs_server *server) |
573 | { | |
574 | struct nfs_client *clp = server->nfs_client; | |
575 | unsigned long expire; | |
576 | ||
577 | seq_printf(m, ",lease_time=%ld", clp->cl_lease_time / HZ); | |
578 | expire = clp->cl_last_renewal + clp->cl_lease_time; | |
579 | seq_printf(m, ",lease_expired=%ld", | |
580 | time_after(expire, jiffies) ? 0 : (jiffies - expire) / HZ); | |
581 | } | |
ae50c0b5 | 582 | #ifdef CONFIG_NFS_V4_1 |
45402c38 | 583 | static void show_sessions(struct seq_file *m, struct nfs_server *server) |
ae50c0b5 BF |
584 | { |
585 | if (nfs4_has_session(server->nfs_client)) | |
1c316e39 | 586 | seq_puts(m, ",sessions"); |
ae50c0b5 BF |
587 | } |
588 | #else | |
45402c38 HS |
589 | static void show_sessions(struct seq_file *m, struct nfs_server *server) {} |
590 | #endif | |
ae50c0b5 BF |
591 | #endif |
592 | ||
593 | #ifdef CONFIG_NFS_V4_1 | |
45402c38 | 594 | static void show_pnfs(struct seq_file *m, struct nfs_server *server) |
ae50c0b5 BF |
595 | { |
596 | seq_printf(m, ",pnfs="); | |
597 | if (server->pnfs_curr_ld) | |
598 | seq_printf(m, "%s", server->pnfs_curr_ld->name); | |
599 | else | |
600 | seq_printf(m, "not configured"); | |
601 | } | |
7e03b7cc TM |
602 | |
603 | static void show_implementation_id(struct seq_file *m, struct nfs_server *nfss) | |
604 | { | |
59155546 CL |
605 | if (nfss->nfs_client && nfss->nfs_client->cl_implid) { |
606 | struct nfs41_impl_id *impl_id = nfss->nfs_client->cl_implid; | |
7e03b7cc TM |
607 | seq_printf(m, "\n\timpl_id:\tname='%s',domain='%s'," |
608 | "date='%llu,%u'", | |
609 | impl_id->name, impl_id->domain, | |
610 | impl_id->date.seconds, impl_id->date.nseconds); | |
611 | } | |
612 | } | |
45402c38 | 613 | #else |
89d77c8f | 614 | #if IS_ENABLED(CONFIG_NFS_V4) |
7e03b7cc TM |
615 | static void show_pnfs(struct seq_file *m, struct nfs_server *server) |
616 | { | |
617 | } | |
45402c38 | 618 | #endif |
7e03b7cc TM |
619 | static void show_implementation_id(struct seq_file *m, struct nfs_server *nfss) |
620 | { | |
621 | } | |
45402c38 | 622 | #endif |
f7b422b1 | 623 | |
fbdefd64 | 624 | int nfs_show_devname(struct seq_file *m, struct dentry *root) |
c7f404b4 AV |
625 | { |
626 | char *page = (char *) __get_free_page(GFP_KERNEL); | |
627 | char *devname, *dummy; | |
628 | int err = 0; | |
629 | if (!page) | |
630 | return -ENOMEM; | |
97a54868 | 631 | devname = nfs_path(&dummy, root, page, PAGE_SIZE, 0); |
c7f404b4 AV |
632 | if (IS_ERR(devname)) |
633 | err = PTR_ERR(devname); | |
634 | else | |
635 | seq_escape(m, devname, " \t\n\\"); | |
636 | free_page((unsigned long)page); | |
637 | return err; | |
638 | } | |
89d77c8f | 639 | EXPORT_SYMBOL_GPL(nfs_show_devname); |
c7f404b4 | 640 | |
fbdefd64 | 641 | int nfs_show_path(struct seq_file *m, struct dentry *dentry) |
c7f404b4 AV |
642 | { |
643 | seq_puts(m, "/"); | |
644 | return 0; | |
645 | } | |
89d77c8f | 646 | EXPORT_SYMBOL_GPL(nfs_show_path); |
c7f404b4 | 647 | |
f7b422b1 DH |
648 | /* |
649 | * Present statistical information for this VFS mountpoint | |
650 | */ | |
fbdefd64 | 651 | int nfs_show_stats(struct seq_file *m, struct dentry *root) |
f7b422b1 DH |
652 | { |
653 | int i, cpu; | |
64132379 | 654 | struct nfs_server *nfss = NFS_SB(root->d_sb); |
f7b422b1 DH |
655 | struct rpc_auth *auth = nfss->client->cl_auth; |
656 | struct nfs_iostats totals = { }; | |
657 | ||
658 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
659 | ||
660 | /* | |
661 | * Display all mount option settings | |
662 | */ | |
1c316e39 | 663 | seq_puts(m, "\n\topts:\t"); |
bc98a42c | 664 | seq_puts(m, sb_rdonly(root->d_sb) ? "ro" : "rw"); |
1751e8a6 LT |
665 | seq_puts(m, root->d_sb->s_flags & SB_SYNCHRONOUS ? ",sync" : ""); |
666 | seq_puts(m, root->d_sb->s_flags & SB_NOATIME ? ",noatime" : ""); | |
667 | seq_puts(m, root->d_sb->s_flags & SB_NODIRATIME ? ",nodiratime" : ""); | |
f7b422b1 DH |
668 | nfs_show_mount_options(m, nfss, 1); |
669 | ||
670 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); | |
671 | ||
7e03b7cc | 672 | show_implementation_id(m, nfss); |
7d2ed9ac | 673 | |
1c316e39 | 674 | seq_puts(m, "\n\tcaps:\t"); |
f7b422b1 | 675 | seq_printf(m, "caps=0x%x", nfss->caps); |
2d767432 CL |
676 | seq_printf(m, ",wtmult=%u", nfss->wtmult); |
677 | seq_printf(m, ",dtsize=%u", nfss->dtsize); | |
678 | seq_printf(m, ",bsize=%u", nfss->bsize); | |
679 | seq_printf(m, ",namlen=%u", nfss->namelen); | |
f7b422b1 | 680 | |
89d77c8f | 681 | #if IS_ENABLED(CONFIG_NFS_V4) |
40c55319 | 682 | if (nfss->nfs_client->rpc_ops->version == 4) { |
1c316e39 | 683 | seq_puts(m, "\n\tnfsv4:\t"); |
f7b422b1 DH |
684 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); |
685 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
a09df2ca | 686 | seq_printf(m, ",bm2=0x%x", nfss->attr_bitmask[2]); |
f7b422b1 | 687 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); |
ae50c0b5 BF |
688 | show_sessions(m, nfss); |
689 | show_pnfs(m, nfss); | |
1a7441b2 | 690 | show_lease(m, nfss); |
f7b422b1 DH |
691 | } |
692 | #endif | |
693 | ||
694 | /* | |
695 | * Display security flavor in effect for this mount | |
696 | */ | |
2d767432 | 697 | seq_printf(m, "\n\tsec:\tflavor=%u", auth->au_ops->au_flavor); |
f7b422b1 | 698 | if (auth->au_flavor) |
2d767432 | 699 | seq_printf(m, ",pseudoflavor=%u", auth->au_flavor); |
f7b422b1 DH |
700 | |
701 | /* | |
702 | * Display superblock I/O counters | |
703 | */ | |
704 | for_each_possible_cpu(cpu) { | |
705 | struct nfs_iostats *stats; | |
706 | ||
707 | preempt_disable(); | |
708 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
709 | ||
710 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
711 | totals.events[i] += stats->events[i]; | |
712 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
713 | totals.bytes[i] += stats->bytes[i]; | |
714 | ||
715 | preempt_enable(); | |
716 | } | |
717 | ||
1c316e39 | 718 | seq_puts(m, "\n\tevents:\t"); |
f7b422b1 DH |
719 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) |
720 | seq_printf(m, "%lu ", totals.events[i]); | |
1c316e39 | 721 | seq_puts(m, "\n\tbytes:\t"); |
f7b422b1 DH |
722 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) |
723 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
9bcaa35c | 724 | seq_putc(m, '\n'); |
f7b422b1 | 725 | |
016583d7 | 726 | rpc_clnt_show_stats(m, nfss->client); |
f7b422b1 DH |
727 | |
728 | return 0; | |
729 | } | |
89d77c8f | 730 | EXPORT_SYMBOL_GPL(nfs_show_stats); |
f7b422b1 DH |
731 | |
732 | /* | |
733 | * Begin unmount by attempting to remove all automounted mountpoints we added | |
54ceac45 | 734 | * in response to xdev traversals and referrals |
f7b422b1 | 735 | */ |
fbdefd64 | 736 | void nfs_umount_begin(struct super_block *sb) |
f7b422b1 | 737 | { |
67e55205 | 738 | struct nfs_server *server; |
fc6ae3cf TM |
739 | struct rpc_clnt *rpc; |
740 | ||
67e55205 | 741 | server = NFS_SB(sb); |
fc6ae3cf TM |
742 | /* -EIO all pending I/O */ |
743 | rpc = server->client_acl; | |
744 | if (!IS_ERR(rpc)) | |
745 | rpc_killall_tasks(rpc); | |
746 | rpc = server->client; | |
747 | if (!IS_ERR(rpc)) | |
748 | rpc_killall_tasks(rpc); | |
f7b422b1 | 749 | } |
89d77c8f | 750 | EXPORT_SYMBOL_GPL(nfs_umount_begin); |
f7b422b1 | 751 | |
4d4b69dd WAA |
752 | /* |
753 | * Return true if 'match' is in auth_info or auth_info is empty. | |
754 | * Return false otherwise. | |
755 | */ | |
756 | bool nfs_auth_info_match(const struct nfs_auth_info *auth_info, | |
757 | rpc_authflavor_t match) | |
758 | { | |
759 | int i; | |
760 | ||
761 | if (!auth_info->flavor_len) | |
762 | return true; | |
763 | ||
764 | for (i = 0; i < auth_info->flavor_len; i++) { | |
765 | if (auth_info->flavors[i] == match) | |
766 | return true; | |
767 | } | |
768 | return false; | |
769 | } | |
770 | EXPORT_SYMBOL_GPL(nfs_auth_info_match); | |
771 | ||
ec88f28d | 772 | /* |
38465f5d SM |
773 | * Ensure that a specified authtype in ctx->auth_info is supported by |
774 | * the server. Returns 0 and sets ctx->selected_flavor if it's ok, and | |
4d4b69dd | 775 | * -EACCES if not. |
ec88f28d | 776 | */ |
38465f5d | 777 | static int nfs_verify_authflavors(struct nfs_fs_context *ctx, |
5eb005ca DH |
778 | rpc_authflavor_t *server_authlist, |
779 | unsigned int count) | |
ec88f28d | 780 | { |
4d4b69dd | 781 | rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; |
53a75f22 | 782 | bool found_auth_null = false; |
9111c95b | 783 | unsigned int i; |
4580a92d | 784 | |
d497ab97 WAA |
785 | /* |
786 | * If the sec= mount option is used, the specified flavor or AUTH_NULL | |
787 | * must be in the list returned by the server. | |
788 | * | |
789 | * AUTH_NULL has a special meaning when it's in the server list - it | |
790 | * means that the server will ignore the rpc creds, so any flavor | |
e68fd7c8 | 791 | * can be used but still use the sec= that was specified. |
53a75f22 CL |
792 | * |
793 | * Note also that the MNT procedure in MNTv1 does not return a list | |
794 | * of supported security flavors. In this case, nfs_mount() fabricates | |
795 | * a security flavor list containing just AUTH_NULL. | |
d497ab97 | 796 | */ |
4580a92d | 797 | for (i = 0; i < count; i++) { |
4d4b69dd WAA |
798 | flavor = server_authlist[i]; |
799 | ||
38465f5d | 800 | if (nfs_auth_info_match(&ctx->auth_info, flavor)) |
9111c95b | 801 | goto out; |
e68fd7c8 SD |
802 | |
803 | if (flavor == RPC_AUTH_NULL) | |
53a75f22 | 804 | found_auth_null = true; |
e68fd7c8 SD |
805 | } |
806 | ||
53a75f22 | 807 | if (found_auth_null) { |
38465f5d | 808 | flavor = ctx->auth_info.flavors[0]; |
e68fd7c8 | 809 | goto out; |
4580a92d | 810 | } |
ec88f28d | 811 | |
4d4b69dd WAA |
812 | dfprintk(MOUNT, |
813 | "NFS: specified auth flavors not supported by server\n"); | |
9111c95b | 814 | return -EACCES; |
d497ab97 | 815 | |
4580a92d | 816 | out: |
38465f5d SM |
817 | ctx->selected_flavor = flavor; |
818 | dfprintk(MOUNT, "NFS: using auth flavor %u\n", ctx->selected_flavor); | |
d497ab97 | 819 | return 0; |
ec88f28d CL |
820 | } |
821 | ||
0076d7b7 CL |
822 | /* |
823 | * Use the remote server's MOUNT service to request the NFS file handle | |
824 | * corresponding to the provided path. | |
825 | */ | |
62a55d08 | 826 | static int nfs_request_mount(struct fs_context *fc, |
294ae81d JL |
827 | struct nfs_fh *root_fh, |
828 | rpc_authflavor_t *server_authlist, | |
829 | unsigned int *server_authlist_len) | |
0076d7b7 | 830 | { |
62a55d08 | 831 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
c5d120f8 | 832 | struct nfs_mount_request request = { |
cf0d7e7f | 833 | .sap = &ctx->mount_server._address, |
38465f5d SM |
834 | .dirpath = ctx->nfs_server.export_path, |
835 | .protocol = ctx->mount_server.protocol, | |
c5d120f8 | 836 | .fh = root_fh, |
38465f5d | 837 | .noresvport = ctx->flags & NFS_MOUNT_NORESVPORT, |
294ae81d | 838 | .auth_flav_len = server_authlist_len, |
ec88f28d | 839 | .auth_flavs = server_authlist, |
62a55d08 | 840 | .net = fc->net_ns, |
c5d120f8 | 841 | }; |
4c568017 | 842 | int status; |
0076d7b7 | 843 | |
38465f5d SM |
844 | if (ctx->mount_server.version == 0) { |
845 | switch (ctx->version) { | |
8a6e5deb | 846 | default: |
38465f5d | 847 | ctx->mount_server.version = NFS_MNT3_VERSION; |
8a6e5deb TM |
848 | break; |
849 | case 2: | |
38465f5d | 850 | ctx->mount_server.version = NFS_MNT_VERSION; |
8a6e5deb | 851 | } |
0076d7b7 | 852 | } |
38465f5d | 853 | request.version = ctx->mount_server.version; |
0076d7b7 | 854 | |
38465f5d SM |
855 | if (ctx->mount_server.hostname) |
856 | request.hostname = ctx->mount_server.hostname; | |
33832034 | 857 | else |
38465f5d | 858 | request.hostname = ctx->nfs_server.hostname; |
33832034 | 859 | |
0076d7b7 CL |
860 | /* |
861 | * Construct the mount server's address. | |
862 | */ | |
38465f5d | 863 | if (ctx->mount_server.address.sa_family == AF_UNSPEC) { |
cf0d7e7f | 864 | memcpy(request.sap, &ctx->nfs_server._address, |
38465f5d SM |
865 | ctx->nfs_server.addrlen); |
866 | ctx->mount_server.addrlen = ctx->nfs_server.addrlen; | |
4c568017 | 867 | } |
38465f5d SM |
868 | request.salen = ctx->mount_server.addrlen; |
869 | nfs_set_port(request.sap, &ctx->mount_server.port, 0); | |
0076d7b7 CL |
870 | |
871 | /* | |
872 | * Now ask the mount server to map our export path | |
873 | * to a file handle. | |
874 | */ | |
c9301cb3 | 875 | status = nfs_mount(&request, ctx->timeo, ctx->retrans); |
ec88f28d CL |
876 | if (status != 0) { |
877 | dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n", | |
878 | request.hostname, status); | |
879 | return status; | |
880 | } | |
0076d7b7 | 881 | |
9111c95b | 882 | return 0; |
0076d7b7 CL |
883 | } |
884 | ||
62a55d08 | 885 | static struct nfs_server *nfs_try_mount_request(struct fs_context *fc) |
d17540c6 | 886 | { |
62a55d08 | 887 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
d17540c6 | 888 | int status; |
9111c95b JL |
889 | unsigned int i; |
890 | bool tried_auth_unix = false; | |
891 | bool auth_null_in_list = false; | |
892 | struct nfs_server *server = ERR_PTR(-EACCES); | |
294ae81d JL |
893 | rpc_authflavor_t authlist[NFS_MAX_SECFLAVORS]; |
894 | unsigned int authlist_len = ARRAY_SIZE(authlist); | |
d17540c6 | 895 | |
62a55d08 | 896 | status = nfs_request_mount(fc, ctx->mntfh, authlist, &authlist_len); |
d17540c6 JL |
897 | if (status) |
898 | return ERR_PTR(status); | |
899 | ||
9111c95b JL |
900 | /* |
901 | * Was a sec= authflavor specified in the options? First, verify | |
902 | * whether the server supports it, and then just try to use it if so. | |
903 | */ | |
5eb005ca DH |
904 | if (ctx->auth_info.flavor_len > 0) { |
905 | status = nfs_verify_authflavors(ctx, authlist, authlist_len); | |
a3f73c27 | 906 | dfprintk(MOUNT, "NFS: using auth flavor %u\n", |
5eb005ca | 907 | ctx->selected_flavor); |
9111c95b JL |
908 | if (status) |
909 | return ERR_PTR(status); | |
62a55d08 | 910 | return ctx->nfs_mod->rpc_ops->create_server(fc); |
9111c95b JL |
911 | } |
912 | ||
913 | /* | |
914 | * No sec= option was provided. RFC 2623, section 2.7 suggests we | |
915 | * SHOULD prefer the flavor listed first. However, some servers list | |
916 | * AUTH_NULL first. Avoid ever choosing AUTH_NULL. | |
917 | */ | |
918 | for (i = 0; i < authlist_len; ++i) { | |
919 | rpc_authflavor_t flavor; | |
920 | struct rpcsec_gss_info info; | |
921 | ||
922 | flavor = authlist[i]; | |
923 | switch (flavor) { | |
924 | case RPC_AUTH_UNIX: | |
925 | tried_auth_unix = true; | |
926 | break; | |
927 | case RPC_AUTH_NULL: | |
928 | auth_null_in_list = true; | |
929 | continue; | |
930 | default: | |
931 | if (rpcauth_get_gssinfo(flavor, &info) != 0) | |
932 | continue; | |
fb08334b | 933 | break; |
9111c95b JL |
934 | } |
935 | dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", flavor); | |
5eb005ca | 936 | ctx->selected_flavor = flavor; |
62a55d08 | 937 | server = ctx->nfs_mod->rpc_ops->create_server(fc); |
9111c95b JL |
938 | if (!IS_ERR(server)) |
939 | return server; | |
940 | } | |
941 | ||
942 | /* | |
943 | * Nothing we tried so far worked. At this point, give up if we've | |
944 | * already tried AUTH_UNIX or if the server's list doesn't contain | |
945 | * AUTH_NULL | |
946 | */ | |
947 | if (tried_auth_unix || !auth_null_in_list) | |
948 | return server; | |
949 | ||
950 | /* Last chance! Try AUTH_UNIX */ | |
951 | dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", RPC_AUTH_UNIX); | |
5eb005ca | 952 | ctx->selected_flavor = RPC_AUTH_UNIX; |
62a55d08 | 953 | return ctx->nfs_mod->rpc_ops->create_server(fc); |
d17540c6 JL |
954 | } |
955 | ||
f2aedb71 | 956 | int nfs_try_get_tree(struct fs_context *fc) |
486aa699 | 957 | { |
f2aedb71 DH |
958 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
959 | ||
960 | if (ctx->need_mount) | |
62a55d08 | 961 | ctx->server = nfs_try_mount_request(fc); |
d17540c6 | 962 | else |
62a55d08 | 963 | ctx->server = ctx->nfs_mod->rpc_ops->create_server(fc); |
486aa699 | 964 | |
f2aedb71 | 965 | return nfs_get_tree_common(fc); |
486aa699 | 966 | } |
f2aedb71 DH |
967 | EXPORT_SYMBOL_GPL(nfs_try_get_tree); |
968 | ||
486aa699 | 969 | |
71a6ec8a | 970 | #define NFS_REMOUNT_CMP_FLAGMASK ~(NFS_MOUNT_INTR \ |
c8e47028 SM |
971 | | NFS_MOUNT_SECURE \ |
972 | | NFS_MOUNT_TCP \ | |
973 | | NFS_MOUNT_VER3 \ | |
974 | | NFS_MOUNT_KERBEROS \ | |
975 | | NFS_MOUNT_NONLM \ | |
976 | | NFS_MOUNT_BROKEN_SUID \ | |
977 | | NFS_MOUNT_STRICTLOCK \ | |
c8e47028 SM |
978 | | NFS_MOUNT_LEGACY_INTERFACE) |
979 | ||
71a6ec8a SM |
980 | #define NFS_MOUNT_CMP_FLAGMASK (NFS_REMOUNT_CMP_FLAGMASK & \ |
981 | ~(NFS_MOUNT_UNSHARED | NFS_MOUNT_NORESVPORT)) | |
982 | ||
48b605f8 JL |
983 | static int |
984 | nfs_compare_remount_data(struct nfs_server *nfss, | |
5eb005ca | 985 | struct nfs_fs_context *ctx) |
48b605f8 | 986 | { |
5eb005ca DH |
987 | if ((ctx->flags ^ nfss->flags) & NFS_REMOUNT_CMP_FLAGMASK || |
988 | ctx->rsize != nfss->rsize || | |
989 | ctx->wsize != nfss->wsize || | |
990 | ctx->version != nfss->nfs_client->rpc_ops->version || | |
991 | ctx->minorversion != nfss->nfs_client->cl_minorversion || | |
992 | ctx->retrans != nfss->client->cl_timeout->to_retries || | |
993 | !nfs_auth_info_match(&ctx->auth_info, nfss->client->cl_auth->au_flavor) || | |
994 | ctx->acregmin != nfss->acregmin / HZ || | |
995 | ctx->acregmax != nfss->acregmax / HZ || | |
996 | ctx->acdirmin != nfss->acdirmin / HZ || | |
997 | ctx->acdirmax != nfss->acdirmax / HZ || | |
998 | ctx->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) || | |
999 | (ctx->options & NFS_OPTION_FSCACHE) != (nfss->options & NFS_OPTION_FSCACHE) || | |
1000 | ctx->nfs_server.port != nfss->port || | |
1001 | ctx->nfs_server.addrlen != nfss->nfs_client->cl_addrlen || | |
1002 | !rpc_cmp_addr((struct sockaddr *)&ctx->nfs_server.address, | |
a1be9eee | 1003 | (struct sockaddr *)&nfss->nfs_client->cl_addr)) |
48b605f8 JL |
1004 | return -EINVAL; |
1005 | ||
1006 | return 0; | |
1007 | } | |
1008 | ||
f2aedb71 | 1009 | int nfs_reconfigure(struct fs_context *fc) |
48b605f8 | 1010 | { |
f2aedb71 DH |
1011 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
1012 | struct super_block *sb = fc->root->d_sb; | |
48b605f8 | 1013 | struct nfs_server *nfss = sb->s_fs_info; |
1301ba60 | 1014 | int ret; |
48b605f8 | 1015 | |
02b9984d TT |
1016 | sync_filesystem(sb); |
1017 | ||
48b605f8 JL |
1018 | /* |
1019 | * Userspace mount programs that send binary options generally send | |
1020 | * them populated with default values. We have no way to know which | |
1021 | * ones were explicitly specified. Fall back to legacy behavior and | |
1022 | * just return success. | |
1023 | */ | |
f2aedb71 | 1024 | if (ctx->skip_reconfig_option_check) |
48b605f8 JL |
1025 | return 0; |
1026 | ||
26c4c170 JL |
1027 | /* |
1028 | * noac is a special case. It implies -o sync, but that's not | |
f2aedb71 | 1029 | * necessarily reflected in the mtab options. reconfigure_super |
1751e8a6 | 1030 | * will clear SB_SYNCHRONOUS if -o sync wasn't specified in the |
26c4c170 JL |
1031 | * remount options, so we have to explicitly reset it. |
1032 | */ | |
f2aedb71 DH |
1033 | if (ctx->flags & NFS_MOUNT_NOAC) { |
1034 | fc->sb_flags |= SB_SYNCHRONOUS; | |
1035 | fc->sb_flags_mask |= SB_SYNCHRONOUS; | |
1036 | } | |
26c4c170 | 1037 | |
48b605f8 | 1038 | /* compare new mount options with old ones */ |
1301ba60 AS |
1039 | ret = nfs_compare_remount_data(nfss, ctx); |
1040 | if (ret) | |
1041 | return ret; | |
1042 | ||
1043 | return nfs_probe_server(nfss, NFS_FH(d_inode(fc->root))); | |
48b605f8 | 1044 | } |
f2aedb71 | 1045 | EXPORT_SYMBOL_GPL(nfs_reconfigure); |
48b605f8 | 1046 | |
f7b422b1 | 1047 | /* |
ab88dca3 | 1048 | * Finish setting up an NFS superblock |
f7b422b1 | 1049 | */ |
62a55d08 | 1050 | static void nfs_fill_super(struct super_block *sb, struct nfs_fs_context *ctx) |
f7b422b1 DH |
1051 | { |
1052 | struct nfs_server *server = NFS_SB(sb); | |
5006a76c | 1053 | |
54ceac45 DH |
1054 | sb->s_blocksize_bits = 0; |
1055 | sb->s_blocksize = 0; | |
6a74490d BS |
1056 | sb->s_xattr = server->nfs_client->cl_nfs_mod->xattr; |
1057 | sb->s_op = server->nfs_client->cl_nfs_mod->sops; | |
8c6d76a3 | 1058 | if (ctx->bsize) |
5eb005ca | 1059 | sb->s_blocksize = nfs_block_size(ctx->bsize, &sb->s_blocksize_bits); |
f7b422b1 | 1060 | |
2a9d683b TM |
1061 | switch (server->nfs_client->rpc_ops->version) { |
1062 | case 2: | |
1063 | sb->s_time_gran = 1000; | |
1064 | sb->s_time_min = 0; | |
1065 | sb->s_time_max = U32_MAX; | |
1066 | break; | |
1067 | case 3: | |
1068 | /* | |
1069 | * The VFS shouldn't apply the umask to mode bits. | |
1070 | * We will do so ourselves when necessary. | |
54ceac45 | 1071 | */ |
1751e8a6 | 1072 | sb->s_flags |= SB_POSIXACL; |
54ceac45 | 1073 | sb->s_time_gran = 1; |
1fcb79c1 DD |
1074 | sb->s_time_min = 0; |
1075 | sb->s_time_max = U32_MAX; | |
2a9d683b TM |
1076 | sb->s_export_op = &nfs_export_ops; |
1077 | break; | |
1078 | case 4: | |
5aa8fd9c | 1079 | sb->s_iflags |= SB_I_NOUMASK; |
2a9d683b | 1080 | sb->s_time_gran = 1; |
1fcb79c1 DD |
1081 | sb->s_time_min = S64_MIN; |
1082 | sb->s_time_max = S64_MAX; | |
2a9d683b TM |
1083 | if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) |
1084 | sb->s_export_op = &nfs_export_ops; | |
1085 | break; | |
816724e6 | 1086 | } |
54ceac45 | 1087 | |
ab88dca3 | 1088 | sb->s_magic = NFS_SUPER_MAGIC; |
f7b422b1 | 1089 | |
ab88dca3 AV |
1090 | /* We probably want something more informative here */ |
1091 | snprintf(sb->s_id, sizeof(sb->s_id), | |
1092 | "%u:%u", MAJOR(sb->s_dev), MINOR(sb->s_dev)); | |
1fcb79c1 | 1093 | |
ab88dca3 AV |
1094 | if (sb->s_blocksize == 0) |
1095 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
1096 | &sb->s_blocksize_bits); | |
f7b422b1 | 1097 | |
ab88dca3 | 1098 | nfs_super_set_maxbytes(sb, server->maxfilesize); |
1c725118 | 1099 | nfs_sysfs_move_server_to_sb(sb); |
ec1ade6a | 1100 | server->has_sec_mnt_opts = ctx->has_sec_mnt_opts; |
f7b422b1 DH |
1101 | } |
1102 | ||
62a55d08 SM |
1103 | static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, |
1104 | const struct fs_context *fc) | |
275a5d24 TM |
1105 | { |
1106 | const struct nfs_server *a = s->s_fs_info; | |
1107 | const struct rpc_clnt *clnt_a = a->client; | |
1108 | const struct rpc_clnt *clnt_b = b->client; | |
1109 | ||
62a55d08 | 1110 | if ((s->s_flags & NFS_SB_MASK) != (fc->sb_flags & NFS_SB_MASK)) |
275a5d24 TM |
1111 | goto Ebusy; |
1112 | if (a->nfs_client != b->nfs_client) | |
1113 | goto Ebusy; | |
0aea92bf | 1114 | if ((a->flags ^ b->flags) & NFS_MOUNT_CMP_FLAGMASK) |
275a5d24 TM |
1115 | goto Ebusy; |
1116 | if (a->wsize != b->wsize) | |
1117 | goto Ebusy; | |
1118 | if (a->rsize != b->rsize) | |
1119 | goto Ebusy; | |
1120 | if (a->acregmin != b->acregmin) | |
1121 | goto Ebusy; | |
1122 | if (a->acregmax != b->acregmax) | |
1123 | goto Ebusy; | |
1124 | if (a->acdirmin != b->acdirmin) | |
1125 | goto Ebusy; | |
1126 | if (a->acdirmax != b->acdirmax) | |
1127 | goto Ebusy; | |
594d1644 | 1128 | if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) |
275a5d24 | 1129 | goto Ebusy; |
e89a5a43 | 1130 | return 1; |
275a5d24 | 1131 | Ebusy: |
e89a5a43 TM |
1132 | return 0; |
1133 | } | |
1134 | ||
f2aedb71 | 1135 | static int nfs_set_super(struct super_block *s, struct fs_context *fc) |
e89a5a43 | 1136 | { |
f2aedb71 | 1137 | struct nfs_server *server = fc->s_fs_info; |
e89a5a43 TM |
1138 | int ret; |
1139 | ||
8b244ff2 | 1140 | s->s_d_op = server->nfs_client->rpc_ops->dentry_ops; |
e89a5a43 TM |
1141 | ret = set_anon_super(s, server); |
1142 | if (ret == 0) | |
1143 | server->s_dev = s->s_dev; | |
1144 | return ret; | |
1145 | } | |
1146 | ||
fd00a8ff CL |
1147 | static int nfs_compare_super_address(struct nfs_server *server1, |
1148 | struct nfs_server *server2) | |
1149 | { | |
1150 | struct sockaddr *sap1, *sap2; | |
7e3fcf61 BF |
1151 | struct rpc_xprt *xprt1 = server1->client->cl_xprt; |
1152 | struct rpc_xprt *xprt2 = server2->client->cl_xprt; | |
1153 | ||
1154 | if (!net_eq(xprt1->xprt_net, xprt2->xprt_net)) | |
1155 | return 0; | |
fd00a8ff CL |
1156 | |
1157 | sap1 = (struct sockaddr *)&server1->nfs_client->cl_addr; | |
1158 | sap2 = (struct sockaddr *)&server2->nfs_client->cl_addr; | |
1159 | ||
1160 | if (sap1->sa_family != sap2->sa_family) | |
1161 | return 0; | |
1162 | ||
1163 | switch (sap1->sa_family) { | |
1164 | case AF_INET: { | |
1165 | struct sockaddr_in *sin1 = (struct sockaddr_in *)sap1; | |
1166 | struct sockaddr_in *sin2 = (struct sockaddr_in *)sap2; | |
1167 | if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) | |
1168 | return 0; | |
1169 | if (sin1->sin_port != sin2->sin_port) | |
1170 | return 0; | |
1171 | break; | |
1172 | } | |
1173 | case AF_INET6: { | |
1174 | struct sockaddr_in6 *sin1 = (struct sockaddr_in6 *)sap1; | |
1175 | struct sockaddr_in6 *sin2 = (struct sockaddr_in6 *)sap2; | |
1176 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) | |
1177 | return 0; | |
1178 | if (sin1->sin6_port != sin2->sin6_port) | |
1179 | return 0; | |
1180 | break; | |
1181 | } | |
1182 | default: | |
1183 | return 0; | |
1184 | } | |
1185 | ||
1186 | return 1; | |
1187 | } | |
1188 | ||
3b7eb5e3 TM |
1189 | static int nfs_compare_userns(const struct nfs_server *old, |
1190 | const struct nfs_server *new) | |
1191 | { | |
1192 | const struct user_namespace *oldns = &init_user_ns; | |
1193 | const struct user_namespace *newns = &init_user_ns; | |
1194 | ||
1195 | if (old->client && old->client->cl_cred) | |
1196 | oldns = old->client->cl_cred->user_ns; | |
1197 | if (new->client && new->client->cl_cred) | |
1198 | newns = new->client->cl_cred->user_ns; | |
1199 | if (oldns != newns) | |
1200 | return 0; | |
1201 | return 1; | |
1202 | } | |
1203 | ||
f2aedb71 | 1204 | static int nfs_compare_super(struct super_block *sb, struct fs_context *fc) |
e89a5a43 | 1205 | { |
f2aedb71 | 1206 | struct nfs_server *server = fc->s_fs_info, *old = NFS_SB(sb); |
e89a5a43 | 1207 | |
fd00a8ff | 1208 | if (!nfs_compare_super_address(old, server)) |
e89a5a43 TM |
1209 | return 0; |
1210 | /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */ | |
1211 | if (old->flags & NFS_MOUNT_UNSHARED) | |
1212 | return 0; | |
1213 | if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0) | |
1214 | return 0; | |
3b7eb5e3 TM |
1215 | if (!nfs_compare_userns(old, server)) |
1216 | return 0; | |
ec1ade6a OK |
1217 | if ((old->has_sec_mnt_opts || fc->security) && |
1218 | security_sb_mnt_opts_compat(sb, fc->security)) | |
1219 | return 0; | |
62a55d08 | 1220 | return nfs_compare_mount_options(sb, server, fc); |
275a5d24 TM |
1221 | } |
1222 | ||
39ffb921 | 1223 | #ifdef CONFIG_NFS_FSCACHE |
a6b5a28e DW |
1224 | static int nfs_get_cache_cookie(struct super_block *sb, |
1225 | struct nfs_fs_context *ctx) | |
2311b943 | 1226 | { |
c4271c6e | 1227 | struct nfs_server *nfss = NFS_SB(sb); |
2311b943 BS |
1228 | char *uniq = NULL; |
1229 | int ulen = 0; | |
1230 | ||
c4271c6e TM |
1231 | nfss->fscache = NULL; |
1232 | ||
f2aedb71 | 1233 | if (!ctx) |
a6b5a28e | 1234 | return 0; |
f2aedb71 DH |
1235 | |
1236 | if (ctx->clone_data.sb) { | |
1237 | struct nfs_server *mnt_s = NFS_SB(ctx->clone_data.sb); | |
c4271c6e | 1238 | if (!(mnt_s->options & NFS_OPTION_FSCACHE)) |
a6b5a28e DW |
1239 | return 0; |
1240 | if (mnt_s->fscache_uniq) { | |
1241 | uniq = mnt_s->fscache_uniq; | |
1242 | ulen = strlen(uniq); | |
9c91fa36 | 1243 | } |
f2aedb71 DH |
1244 | } else { |
1245 | if (!(ctx->options & NFS_OPTION_FSCACHE)) | |
a6b5a28e | 1246 | return 0; |
f2aedb71 DH |
1247 | if (ctx->fscache_uniq) { |
1248 | uniq = ctx->fscache_uniq; | |
1249 | ulen = strlen(ctx->fscache_uniq); | |
1250 | } | |
f2aedb71 | 1251 | } |
2311b943 | 1252 | |
a6b5a28e | 1253 | return nfs_fscache_get_super_cookie(sb, uniq, ulen); |
2311b943 | 1254 | } |
39ffb921 | 1255 | #else |
a6b5a28e DW |
1256 | static int nfs_get_cache_cookie(struct super_block *sb, |
1257 | struct nfs_fs_context *ctx) | |
39ffb921 | 1258 | { |
a6b5a28e | 1259 | return 0; |
39ffb921 TM |
1260 | } |
1261 | #endif | |
2311b943 | 1262 | |
f2aedb71 | 1263 | int nfs_get_tree_common(struct fs_context *fc) |
f7b422b1 | 1264 | { |
f2aedb71 | 1265 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
f7b422b1 | 1266 | struct super_block *s; |
f2aedb71 | 1267 | int (*compare_super)(struct super_block *, struct fs_context *) = nfs_compare_super; |
62a55d08 | 1268 | struct nfs_server *server = ctx->server; |
01194981 | 1269 | int error; |
33852a1f | 1270 | |
62a55d08 | 1271 | ctx->server = NULL; |
444a5296 | 1272 | if (IS_ERR(server)) |
f2aedb71 | 1273 | return PTR_ERR(server); |
444a5296 | 1274 | |
75180df2 TM |
1275 | if (server->flags & NFS_MOUNT_UNSHARED) |
1276 | compare_super = NULL; | |
1277 | ||
fb2088cc SP |
1278 | /* -o noac implies -o sync */ |
1279 | if (server->flags & NFS_MOUNT_NOAC) | |
f2aedb71 DH |
1280 | fc->sb_flags |= SB_SYNCHRONOUS; |
1281 | ||
1282 | if (ctx->clone_data.sb) | |
1283 | if (ctx->clone_data.sb->s_flags & SB_SYNCHRONOUS) | |
1284 | fc->sb_flags |= SB_SYNCHRONOUS; | |
fb2088cc | 1285 | |
54ceac45 | 1286 | /* Get a superblock - note that we may end up sharing one that already exists */ |
f2aedb71 DH |
1287 | fc->s_fs_info = server; |
1288 | s = sget_fc(fc, compare_super, nfs_set_super); | |
1289 | fc->s_fs_info = NULL; | |
816724e6 | 1290 | if (IS_ERR(s)) { |
f2aedb71 | 1291 | error = PTR_ERR(s); |
ce8866f0 | 1292 | nfs_errorf(fc, "NFS: Couldn't get superblock"); |
54ceac45 | 1293 | goto out_err_nosb; |
816724e6 TM |
1294 | } |
1295 | ||
54ceac45 DH |
1296 | if (s->s_fs_info != server) { |
1297 | nfs_free_server(server); | |
1298 | server = NULL; | |
fa799759 | 1299 | } else { |
9052c7cf JK |
1300 | error = super_setup_bdi_name(s, "%u:%u", MAJOR(server->s_dev), |
1301 | MINOR(server->s_dev)); | |
f2aedb71 | 1302 | if (error) |
9052c7cf | 1303 | goto error_splat_super; |
55b2598e | 1304 | s->s_bdi->io_pages = server->rpages; |
ce6cda18 | 1305 | server->super = s; |
54ceac45 | 1306 | } |
f7b422b1 | 1307 | |
54ceac45 | 1308 | if (!s->s_root) { |
62a55d08 | 1309 | unsigned bsize = ctx->clone_data.inherited_bsize; |
54ceac45 | 1310 | /* initial superblock/root creation */ |
62a55d08 | 1311 | nfs_fill_super(s, ctx); |
ab88dca3 AV |
1312 | if (bsize) { |
1313 | s->s_blocksize_bits = bsize; | |
1314 | s->s_blocksize = 1U << bsize; | |
1315 | } | |
a6b5a28e DW |
1316 | error = nfs_get_cache_cookie(s, ctx); |
1317 | if (error < 0) | |
1318 | goto error_splat_super; | |
54ceac45 | 1319 | } |
f7b422b1 | 1320 | |
62a55d08 SM |
1321 | error = nfs_get_root(s, fc); |
1322 | if (error < 0) { | |
ce8866f0 | 1323 | nfs_errorf(fc, "NFS: Couldn't get root dentry"); |
54ceac45 | 1324 | goto error_splat_super; |
f2aedb71 | 1325 | } |
adf2314f | 1326 | |
1751e8a6 | 1327 | s->s_flags |= SB_ACTIVE; |
f2aedb71 | 1328 | error = 0; |
0655960f CL |
1329 | |
1330 | out: | |
f2aedb71 | 1331 | return error; |
816724e6 | 1332 | |
54ceac45 DH |
1333 | out_err_nosb: |
1334 | nfs_free_server(server); | |
0655960f | 1335 | goto out; |
54ceac45 | 1336 | error_splat_super: |
6f5bbff9 | 1337 | deactivate_locked_super(s); |
0655960f | 1338 | goto out; |
f7b422b1 DH |
1339 | } |
1340 | ||
54ceac45 | 1341 | /* |
1c725118 | 1342 | * Destroy an NFS superblock |
54ceac45 | 1343 | */ |
fbdefd64 | 1344 | void nfs_kill_super(struct super_block *s) |
f7b422b1 DH |
1345 | { |
1346 | struct nfs_server *server = NFS_SB(s); | |
7b14a213 | 1347 | |
1c725118 | 1348 | nfs_sysfs_move_sb_to_server(server); |
5069ba84 | 1349 | kill_anon_super(s); |
f7b422b1 | 1350 | |
08734048 | 1351 | nfs_fscache_release_super_cookie(s); |
7b14a213 | 1352 | |
54ceac45 | 1353 | nfs_free_server(server); |
f7b422b1 | 1354 | } |
89d77c8f | 1355 | EXPORT_SYMBOL_GPL(nfs_kill_super); |
f7b422b1 | 1356 | |
89d77c8f | 1357 | #if IS_ENABLED(CONFIG_NFS_V4) |
54ceac45 | 1358 | |
fac1e8e4 BS |
1359 | /* |
1360 | * NFS v4 module parameters need to stay in the | |
1361 | * NFS client for backwards compatibility | |
1362 | */ | |
1363 | unsigned int nfs_callback_set_tcpport; | |
5405fc44 | 1364 | unsigned short nfs_callback_nr_threads; |
fac1e8e4 BS |
1365 | /* Default cache timeout is 10 minutes */ |
1366 | unsigned int nfs_idmap_cache_timeout = 600; | |
1367 | /* Turn off NFSv4 uid/gid mapping when using AUTH_SYS */ | |
1368 | bool nfs4_disable_idmapping = true; | |
1369 | unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE; | |
5405fc44 | 1370 | unsigned short max_session_cb_slots = NFS4_DEF_CB_SLOT_TABLE_SIZE; |
fac1e8e4 | 1371 | unsigned short send_implementation_id = 1; |
6f2ea7f2 | 1372 | char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN] = ""; |
f6de7a39 | 1373 | bool recover_lost_locks = false; |
5b9d31ae | 1374 | short nfs_delay_retrans = -1; |
fac1e8e4 | 1375 | |
5405fc44 | 1376 | EXPORT_SYMBOL_GPL(nfs_callback_nr_threads); |
89d77c8f | 1377 | EXPORT_SYMBOL_GPL(nfs_callback_set_tcpport); |
89d77c8f BS |
1378 | EXPORT_SYMBOL_GPL(nfs_idmap_cache_timeout); |
1379 | EXPORT_SYMBOL_GPL(nfs4_disable_idmapping); | |
1380 | EXPORT_SYMBOL_GPL(max_session_slots); | |
5405fc44 | 1381 | EXPORT_SYMBOL_GPL(max_session_cb_slots); |
89d77c8f | 1382 | EXPORT_SYMBOL_GPL(send_implementation_id); |
6f2ea7f2 | 1383 | EXPORT_SYMBOL_GPL(nfs4_client_id_uniquifier); |
f6de7a39 | 1384 | EXPORT_SYMBOL_GPL(recover_lost_locks); |
5b9d31ae | 1385 | EXPORT_SYMBOL_GPL(nfs_delay_retrans); |
89d77c8f | 1386 | |
fac1e8e4 BS |
1387 | #define NFS_CALLBACK_MAXPORTNR (65535U) |
1388 | ||
1389 | static int param_set_portnr(const char *val, const struct kernel_param *kp) | |
1390 | { | |
1391 | unsigned long num; | |
1392 | int ret; | |
1393 | ||
1394 | if (!val) | |
1395 | return -EINVAL; | |
7297cb68 | 1396 | ret = kstrtoul(val, 0, &num); |
379ebf07 | 1397 | if (ret || num > NFS_CALLBACK_MAXPORTNR) |
fac1e8e4 BS |
1398 | return -EINVAL; |
1399 | *((unsigned int *)kp->arg) = num; | |
1400 | return 0; | |
1401 | } | |
9c27847d | 1402 | static const struct kernel_param_ops param_ops_portnr = { |
fac1e8e4 BS |
1403 | .set = param_set_portnr, |
1404 | .get = param_get_uint, | |
1405 | }; | |
a799b68a | 1406 | #define param_check_portnr(name, p) __param_check(name, p, unsigned int) |
fac1e8e4 BS |
1407 | |
1408 | module_param_named(callback_tcpport, nfs_callback_set_tcpport, portnr, 0644); | |
5405fc44 TM |
1409 | module_param_named(callback_nr_threads, nfs_callback_nr_threads, ushort, 0644); |
1410 | MODULE_PARM_DESC(callback_nr_threads, "Number of threads that will be " | |
1411 | "assigned to the NFSv4 callback channels."); | |
fac1e8e4 BS |
1412 | module_param(nfs_idmap_cache_timeout, int, 0644); |
1413 | module_param(nfs4_disable_idmapping, bool, 0644); | |
6f2ea7f2 CL |
1414 | module_param_string(nfs4_unique_id, nfs4_client_id_uniquifier, |
1415 | NFS4_CLIENT_ID_UNIQ_LEN, 0600); | |
fac1e8e4 BS |
1416 | MODULE_PARM_DESC(nfs4_disable_idmapping, |
1417 | "Turn off NFSv4 idmapping when using 'sec=sys'"); | |
1418 | module_param(max_session_slots, ushort, 0644); | |
1419 | MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 " | |
1420 | "requests the client will negotiate"); | |
5405fc44 | 1421 | module_param(max_session_cb_slots, ushort, 0644); |
f36ab161 | 1422 | MODULE_PARM_DESC(max_session_cb_slots, "Maximum number of parallel NFSv4.1 " |
5405fc44 | 1423 | "callbacks the client will process for a given server"); |
fac1e8e4 BS |
1424 | module_param(send_implementation_id, ushort, 0644); |
1425 | MODULE_PARM_DESC(send_implementation_id, | |
1426 | "Send implementation ID with NFSv4.1 exchange_id"); | |
6f2ea7f2 | 1427 | MODULE_PARM_DESC(nfs4_unique_id, "nfs_client_id4 uniquifier string"); |
425e776d | 1428 | |
f6de7a39 TM |
1429 | module_param(recover_lost_locks, bool, 0644); |
1430 | MODULE_PARM_DESC(recover_lost_locks, | |
1431 | "If the server reports that a lock might be lost, " | |
1432 | "try to recover it risking data corruption."); | |
1433 | ||
5b9d31ae TM |
1434 | module_param_named(delay_retrans, nfs_delay_retrans, short, 0644); |
1435 | MODULE_PARM_DESC(delay_retrans, | |
1436 | "Unless negative, specifies the number of times the NFSv4 " | |
1437 | "client retries a request before returning an EAGAIN error, " | |
1438 | "after a reply of NFS4ERR_DELAY from the server."); | |
54ceac45 | 1439 | #endif /* CONFIG_NFS_V4 */ |