Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * NFS exporting and validation. |
4 | * | |
5 | * We maintain a list of clients, each of which has a list of | |
6 | * exports. To export an fs to a given client, you first have | |
7 | * to create the client entry with NFSCTL_ADDCLIENT, which | |
8 | * creates a client control block and adds it to the hash | |
9 | * table. Then, you call NFSCTL_EXPORT for each fs. | |
10 | * | |
11 | * | |
12 | * Copyright (C) 1995, 1996 Olaf Kirch, <okir@monad.swb.de> | |
13 | */ | |
14 | ||
5a0e3ad6 | 15 | #include <linux/slab.h> |
1da177e4 | 16 | #include <linux/namei.h> |
f35279d3 | 17 | #include <linux/module.h> |
a5694255 | 18 | #include <linux/exportfs.h> |
b3853e0e | 19 | #include <linux/sunrpc/svc_xprt.h> |
1da177e4 | 20 | |
9a74af21 | 21 | #include "nfsd.h" |
1557aca7 | 22 | #include "nfsfh.h" |
b3853e0e | 23 | #include "netns.h" |
9cf514cc | 24 | #include "pnfs.h" |
65294c1f | 25 | #include "filecache.h" |
cf749f3c | 26 | #include "trace.h" |
9a74af21 | 27 | |
1da177e4 | 28 | #define NFSDDBG_FACILITY NFSDDBG_EXPORT |
1da177e4 | 29 | |
1da177e4 LT |
30 | /* |
31 | * We have two caches. | |
32 | * One maps client+vfsmnt+dentry to export options - the export map | |
33 | * The other maps client+filehandle-fragment to export options. - the expkey map | |
34 | * | |
35 | * The export options are actually stored in the first map, and the | |
36 | * second map contains a reference to the entry in the first map. | |
37 | */ | |
38 | ||
39 | #define EXPKEY_HASHBITS 8 | |
40 | #define EXPKEY_HASHMAX (1 << EXPKEY_HASHBITS) | |
41 | #define EXPKEY_HASHMASK (EXPKEY_HASHMAX -1) | |
1da177e4 | 42 | |
74cae61a | 43 | static void expkey_put(struct kref *ref) |
1da177e4 | 44 | { |
baab935f N |
45 | struct svc_expkey *key = container_of(ref, struct svc_expkey, h.ref); |
46 | ||
47 | if (test_bit(CACHE_VALID, &key->h.flags) && | |
e83aece3 JB |
48 | !test_bit(CACHE_NEGATIVE, &key->h.flags)) |
49 | path_put(&key->ek_path); | |
baab935f | 50 | auth_domain_put(key->ek_client); |
9ceddd9d | 51 | kfree_rcu(key, ek_rcu); |
1da177e4 LT |
52 | } |
53 | ||
65286b88 TM |
54 | static int expkey_upcall(struct cache_detail *cd, struct cache_head *h) |
55 | { | |
56 | return sunrpc_cache_pipe_upcall(cd, h); | |
57 | } | |
58 | ||
1da177e4 LT |
59 | static void expkey_request(struct cache_detail *cd, |
60 | struct cache_head *h, | |
61 | char **bpp, int *blen) | |
62 | { | |
63 | /* client fsidtype \xfsid */ | |
64 | struct svc_expkey *ek = container_of(h, struct svc_expkey, h); | |
65 | char type[5]; | |
66 | ||
67 | qword_add(bpp, blen, ek->ek_client->name); | |
68 | snprintf(type, 5, "%d", ek->ek_fsidtype); | |
69 | qword_add(bpp, blen, type); | |
70 | qword_addhex(bpp, blen, (char*)ek->ek_fsid, key_len(ek->ek_fsidtype)); | |
71 | (*bpp)[-1] = '\n'; | |
72 | } | |
73 | ||
c89172e3 SK |
74 | static struct svc_expkey *svc_expkey_update(struct cache_detail *cd, struct svc_expkey *new, |
75 | struct svc_expkey *old); | |
76 | static struct svc_expkey *svc_expkey_lookup(struct cache_detail *cd, struct svc_expkey *); | |
74cae61a | 77 | |
1da177e4 LT |
78 | static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen) |
79 | { | |
f0db79d5 | 80 | /* client fsidtype fsid expiry [path] */ |
1da177e4 LT |
81 | char *buf; |
82 | int len; | |
83 | struct auth_domain *dom = NULL; | |
84 | int err; | |
85 | int fsidtype; | |
86 | char *ep; | |
87 | struct svc_expkey key; | |
30bc4dfd | 88 | struct svc_expkey *ek = NULL; |
1da177e4 | 89 | |
3476964d | 90 | if (mesg[mlen - 1] != '\n') |
1da177e4 LT |
91 | return -EINVAL; |
92 | mesg[mlen-1] = 0; | |
93 | ||
94 | buf = kmalloc(PAGE_SIZE, GFP_KERNEL); | |
95 | err = -ENOMEM; | |
30bc4dfd BF |
96 | if (!buf) |
97 | goto out; | |
1da177e4 LT |
98 | |
99 | err = -EINVAL; | |
75bfb704 | 100 | if (qword_get(&mesg, buf, PAGE_SIZE) <= 0) |
1da177e4 LT |
101 | goto out; |
102 | ||
103 | err = -ENOENT; | |
104 | dom = auth_domain_find(buf); | |
105 | if (!dom) | |
106 | goto out; | |
107 | dprintk("found domain %s\n", buf); | |
108 | ||
109 | err = -EINVAL; | |
75bfb704 | 110 | if (qword_get(&mesg, buf, PAGE_SIZE) <= 0) |
1da177e4 LT |
111 | goto out; |
112 | fsidtype = simple_strtoul(buf, &ep, 10); | |
113 | if (*ep) | |
114 | goto out; | |
115 | dprintk("found fsidtype %d\n", fsidtype); | |
4bdff8c0 | 116 | if (key_len(fsidtype)==0) /* invalid type */ |
1da177e4 LT |
117 | goto out; |
118 | if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0) | |
119 | goto out; | |
120 | dprintk("found fsid length %d\n", len); | |
121 | if (len != key_len(fsidtype)) | |
122 | goto out; | |
123 | ||
124 | /* OK, we seem to have a valid key */ | |
125 | key.h.flags = 0; | |
cf64b9bc N |
126 | err = get_expiry(&mesg, &key.h.expiry_time); |
127 | if (err) | |
1da177e4 LT |
128 | goto out; |
129 | ||
cf64b9bc | 130 | key.ek_client = dom; |
1da177e4 LT |
131 | key.ek_fsidtype = fsidtype; |
132 | memcpy(key.ek_fsid, buf, len); | |
133 | ||
c89172e3 | 134 | ek = svc_expkey_lookup(cd, &key); |
8d270f7f N |
135 | err = -ENOMEM; |
136 | if (!ek) | |
137 | goto out; | |
138 | ||
1da177e4 | 139 | /* now we want a pathname, or empty meaning NEGATIVE */ |
8d270f7f | 140 | err = -EINVAL; |
30bc4dfd BF |
141 | len = qword_get(&mesg, buf, PAGE_SIZE); |
142 | if (len < 0) | |
1da177e4 LT |
143 | goto out; |
144 | dprintk("Path seems to be <%s>\n", buf); | |
145 | err = 0; | |
146 | if (len == 0) { | |
1da177e4 | 147 | set_bit(CACHE_NEGATIVE, &key.h.flags); |
c89172e3 | 148 | ek = svc_expkey_update(cd, &key, ek); |
6a30e47f TM |
149 | if (ek) |
150 | trace_nfsd_expkey_update(ek, NULL); | |
151 | else | |
30bc4dfd | 152 | err = -ENOMEM; |
1da177e4 | 153 | } else { |
a63bb996 | 154 | err = kern_path(buf, 0, &key.ek_path); |
30bc4dfd | 155 | if (err) |
1da177e4 LT |
156 | goto out; |
157 | ||
158 | dprintk("Found the path %s\n", buf); | |
e83aece3 | 159 | |
c89172e3 | 160 | ek = svc_expkey_update(cd, &key, ek); |
6a30e47f TM |
161 | if (ek) |
162 | trace_nfsd_expkey_update(ek, buf); | |
163 | else | |
8d270f7f | 164 | err = -ENOMEM; |
a63bb996 | 165 | path_put(&key.ek_path); |
1da177e4 LT |
166 | } |
167 | cache_flush(); | |
168 | out: | |
30bc4dfd | 169 | if (ek) |
d4bb527e | 170 | cache_put(&ek->h, cd); |
1da177e4 LT |
171 | if (dom) |
172 | auth_domain_put(dom); | |
f99d49ad | 173 | kfree(buf); |
1da177e4 LT |
174 | return err; |
175 | } | |
176 | ||
177 | static int expkey_show(struct seq_file *m, | |
178 | struct cache_detail *cd, | |
179 | struct cache_head *h) | |
180 | { | |
181 | struct svc_expkey *ek ; | |
af6a4e28 | 182 | int i; |
1da177e4 LT |
183 | |
184 | if (h ==NULL) { | |
185 | seq_puts(m, "#domain fsidtype fsid [path]\n"); | |
186 | return 0; | |
187 | } | |
188 | ek = container_of(h, struct svc_expkey, h); | |
af6a4e28 N |
189 | seq_printf(m, "%s %d 0x", ek->ek_client->name, |
190 | ek->ek_fsidtype); | |
191 | for (i=0; i < key_len(ek->ek_fsidtype)/4; i++) | |
192 | seq_printf(m, "%08x", ek->ek_fsid[i]); | |
1da177e4 LT |
193 | if (test_bit(CACHE_VALID, &h->flags) && |
194 | !test_bit(CACHE_NEGATIVE, &h->flags)) { | |
195 | seq_printf(m, " "); | |
c32c2f63 | 196 | seq_path(m, &ek->ek_path, "\\ \t\n"); |
1da177e4 LT |
197 | } |
198 | seq_printf(m, "\n"); | |
199 | return 0; | |
200 | } | |
1da177e4 | 201 | |
8d270f7f | 202 | static inline int expkey_match (struct cache_head *a, struct cache_head *b) |
1da177e4 | 203 | { |
8d270f7f N |
204 | struct svc_expkey *orig = container_of(a, struct svc_expkey, h); |
205 | struct svc_expkey *new = container_of(b, struct svc_expkey, h); | |
206 | ||
207 | if (orig->ek_fsidtype != new->ek_fsidtype || | |
208 | orig->ek_client != new->ek_client || | |
209 | memcmp(orig->ek_fsid, new->ek_fsid, key_len(orig->ek_fsidtype)) != 0) | |
1da177e4 LT |
210 | return 0; |
211 | return 1; | |
212 | } | |
213 | ||
8d270f7f N |
214 | static inline void expkey_init(struct cache_head *cnew, |
215 | struct cache_head *citem) | |
1da177e4 | 216 | { |
8d270f7f N |
217 | struct svc_expkey *new = container_of(cnew, struct svc_expkey, h); |
218 | struct svc_expkey *item = container_of(citem, struct svc_expkey, h); | |
219 | ||
efc36aa5 | 220 | kref_get(&item->ek_client->ref); |
1da177e4 LT |
221 | new->ek_client = item->ek_client; |
222 | new->ek_fsidtype = item->ek_fsidtype; | |
af6a4e28 N |
223 | |
224 | memcpy(new->ek_fsid, item->ek_fsid, sizeof(new->ek_fsid)); | |
1da177e4 LT |
225 | } |
226 | ||
8d270f7f N |
227 | static inline void expkey_update(struct cache_head *cnew, |
228 | struct cache_head *citem) | |
1da177e4 | 229 | { |
8d270f7f N |
230 | struct svc_expkey *new = container_of(cnew, struct svc_expkey, h); |
231 | struct svc_expkey *item = container_of(citem, struct svc_expkey, h); | |
232 | ||
e83aece3 JB |
233 | new->ek_path = item->ek_path; |
234 | path_get(&item->ek_path); | |
1da177e4 LT |
235 | } |
236 | ||
8d270f7f N |
237 | static struct cache_head *expkey_alloc(void) |
238 | { | |
239 | struct svc_expkey *i = kmalloc(sizeof(*i), GFP_KERNEL); | |
240 | if (i) | |
241 | return &i->h; | |
242 | else | |
243 | return NULL; | |
244 | } | |
245 | ||
65294c1f JL |
246 | static void expkey_flush(void) |
247 | { | |
248 | /* | |
249 | * Take the nfsd_mutex here to ensure that the file cache is not | |
250 | * destroyed while we're in the middle of flushing. | |
251 | */ | |
252 | mutex_lock(&nfsd_mutex); | |
5e113224 | 253 | nfsd_file_cache_purge(current->nsproxy->net_ns); |
65294c1f JL |
254 | mutex_unlock(&nfsd_mutex); |
255 | } | |
256 | ||
ae2e408e | 257 | static const struct cache_detail svc_expkey_cache_template = { |
8d270f7f N |
258 | .owner = THIS_MODULE, |
259 | .hash_size = EXPKEY_HASHMAX, | |
8d270f7f N |
260 | .name = "nfsd.fh", |
261 | .cache_put = expkey_put, | |
65286b88 | 262 | .cache_upcall = expkey_upcall, |
73fb847a | 263 | .cache_request = expkey_request, |
8d270f7f N |
264 | .cache_parse = expkey_parse, |
265 | .cache_show = expkey_show, | |
266 | .match = expkey_match, | |
267 | .init = expkey_init, | |
268 | .update = expkey_update, | |
269 | .alloc = expkey_alloc, | |
65294c1f | 270 | .flush = expkey_flush, |
8d270f7f N |
271 | }; |
272 | ||
61f8603d N |
273 | static int |
274 | svc_expkey_hash(struct svc_expkey *item) | |
8d270f7f | 275 | { |
8d270f7f N |
276 | int hash = item->ek_fsidtype; |
277 | char * cp = (char*)item->ek_fsid; | |
278 | int len = key_len(item->ek_fsidtype); | |
279 | ||
280 | hash ^= hash_mem(cp, len, EXPKEY_HASHBITS); | |
281 | hash ^= hash_ptr(item->ek_client, EXPKEY_HASHBITS); | |
282 | hash &= EXPKEY_HASHMASK; | |
61f8603d N |
283 | return hash; |
284 | } | |
285 | ||
286 | static struct svc_expkey * | |
c89172e3 | 287 | svc_expkey_lookup(struct cache_detail *cd, struct svc_expkey *item) |
61f8603d N |
288 | { |
289 | struct cache_head *ch; | |
290 | int hash = svc_expkey_hash(item); | |
8d270f7f | 291 | |
9ceddd9d | 292 | ch = sunrpc_cache_lookup_rcu(cd, &item->h, hash); |
8d270f7f N |
293 | if (ch) |
294 | return container_of(ch, struct svc_expkey, h); | |
295 | else | |
296 | return NULL; | |
297 | } | |
298 | ||
299 | static struct svc_expkey * | |
c89172e3 SK |
300 | svc_expkey_update(struct cache_detail *cd, struct svc_expkey *new, |
301 | struct svc_expkey *old) | |
8d270f7f N |
302 | { |
303 | struct cache_head *ch; | |
61f8603d | 304 | int hash = svc_expkey_hash(new); |
8d270f7f | 305 | |
c89172e3 | 306 | ch = sunrpc_cache_update(cd, &new->h, &old->h, hash); |
8d270f7f N |
307 | if (ch) |
308 | return container_of(ch, struct svc_expkey, h); | |
309 | else | |
310 | return NULL; | |
311 | } | |
312 | ||
1da177e4 LT |
313 | |
314 | #define EXPORT_HASHBITS 8 | |
315 | #define EXPORT_HASHMAX (1<< EXPORT_HASHBITS) | |
1da177e4 | 316 | |
93346919 MN |
317 | static void nfsd4_fslocs_free(struct nfsd4_fs_locations *fsloc) |
318 | { | |
a1f05514 | 319 | struct nfsd4_fs_location *locations = fsloc->locations; |
93346919 MN |
320 | int i; |
321 | ||
a1f05514 KM |
322 | if (!locations) |
323 | return; | |
324 | ||
93346919 | 325 | for (i = 0; i < fsloc->locations_count; i++) { |
a1f05514 KM |
326 | kfree(locations[i].path); |
327 | kfree(locations[i].hosts); | |
93346919 | 328 | } |
a1f05514 KM |
329 | |
330 | kfree(locations); | |
331 | fsloc->locations = NULL; | |
93346919 MN |
332 | } |
333 | ||
20ad856e AG |
334 | static int export_stats_init(struct export_stats *stats) |
335 | { | |
336 | stats->start_time = ktime_get_seconds(); | |
337 | return nfsd_percpu_counters_init(stats->counter, EXP_STATS_COUNTERS_NUM); | |
338 | } | |
339 | ||
340 | static void export_stats_reset(struct export_stats *stats) | |
341 | { | |
342 | nfsd_percpu_counters_reset(stats->counter, EXP_STATS_COUNTERS_NUM); | |
343 | } | |
344 | ||
345 | static void export_stats_destroy(struct export_stats *stats) | |
346 | { | |
347 | nfsd_percpu_counters_destroy(stats->counter, EXP_STATS_COUNTERS_NUM); | |
348 | } | |
349 | ||
baab935f | 350 | static void svc_export_put(struct kref *ref) |
1da177e4 | 351 | { |
baab935f | 352 | struct svc_export *exp = container_of(ref, struct svc_export, h.ref); |
54775491 | 353 | path_put(&exp->ex_path); |
baab935f | 354 | auth_domain_put(exp->ex_client); |
93346919 | 355 | nfsd4_fslocs_free(&exp->ex_fslocs); |
20ad856e | 356 | export_stats_destroy(&exp->ex_stats); |
885c91f7 | 357 | kfree(exp->ex_uuid); |
9ceddd9d | 358 | kfree_rcu(exp, ex_rcu); |
1da177e4 LT |
359 | } |
360 | ||
65286b88 TM |
361 | static int svc_export_upcall(struct cache_detail *cd, struct cache_head *h) |
362 | { | |
363 | return sunrpc_cache_pipe_upcall(cd, h); | |
364 | } | |
365 | ||
1da177e4 LT |
366 | static void svc_export_request(struct cache_detail *cd, |
367 | struct cache_head *h, | |
368 | char **bpp, int *blen) | |
369 | { | |
370 | /* client path */ | |
371 | struct svc_export *exp = container_of(h, struct svc_export, h); | |
372 | char *pth; | |
373 | ||
374 | qword_add(bpp, blen, exp->ex_client->name); | |
cf28b486 | 375 | pth = d_path(&exp->ex_path, *bpp, *blen); |
1da177e4 LT |
376 | if (IS_ERR(pth)) { |
377 | /* is this correct? */ | |
378 | (*bpp)[0] = '\n'; | |
379 | return; | |
380 | } | |
381 | qword_add(bpp, blen, pth); | |
382 | (*bpp)[-1] = '\n'; | |
383 | } | |
384 | ||
74cae61a AB |
385 | static struct svc_export *svc_export_update(struct svc_export *new, |
386 | struct svc_export *old); | |
4f7774c3 | 387 | static struct svc_export *svc_export_lookup(struct svc_export *); |
1da177e4 | 388 | |
899bf2ce | 389 | static int check_export(struct path *path, int *flags, unsigned char *uuid) |
1da177e4 | 390 | { |
899bf2ce | 391 | struct inode *inode = d_inode(path->dentry); |
1da177e4 | 392 | |
f2ca7153 BF |
393 | /* |
394 | * We currently export only dirs, regular files, and (for v4 | |
395 | * pseudoroot) symlinks. | |
1da177e4 LT |
396 | */ |
397 | if (!S_ISDIR(inode->i_mode) && | |
f2ca7153 | 398 | !S_ISLNK(inode->i_mode) && |
1da177e4 LT |
399 | !S_ISREG(inode->i_mode)) |
400 | return -ENOTDIR; | |
401 | ||
774b1478 BF |
402 | /* |
403 | * Mountd should never pass down a writeable V4ROOT export, but, | |
404 | * just to make sure: | |
405 | */ | |
406 | if (*flags & NFSEXP_V4ROOT) | |
407 | *flags |= NFSEXP_READONLY; | |
408 | ||
1da177e4 LT |
409 | /* There are two requirements on a filesystem to be exportable. |
410 | * 1: We must be able to identify the filesystem from a number. | |
411 | * either a device number (so FS_REQUIRES_DEV needed) | |
af6a4e28 | 412 | * or an FSID number (so NFSEXP_FSID or ->uuid is needed). |
1da177e4 LT |
413 | * 2: We must be able to find an inode from a filehandle. |
414 | * This means that s_export_op must be set. | |
899bf2ce | 415 | * 3: We must not currently be on an idmapped mount. |
1da177e4 LT |
416 | */ |
417 | if (!(inode->i_sb->s_type->fs_flags & FS_REQUIRES_DEV) && | |
774b1478 | 418 | !(*flags & NFSEXP_FSID) && |
af6a4e28 | 419 | uuid == NULL) { |
3e3b4800 | 420 | dprintk("exp_export: export of non-dev fs without fsid\n"); |
1da177e4 LT |
421 | return -EINVAL; |
422 | } | |
cfaea787 | 423 | |
66c62769 | 424 | if (!exportfs_can_decode_fh(inode->i_sb->s_export_op)) { |
1da177e4 LT |
425 | dprintk("exp_export: export of invalid fs type.\n"); |
426 | return -EINVAL; | |
427 | } | |
428 | ||
bb49e9e7 | 429 | if (is_idmapped_mnt(path->mnt)) { |
899bf2ce CB |
430 | dprintk("exp_export: export of idmapped mounts not yet supported.\n"); |
431 | return -EINVAL; | |
432 | } | |
433 | ||
ba5e8187 JL |
434 | if (inode->i_sb->s_export_op->flags & EXPORT_OP_NOSUBTREECHK && |
435 | !(*flags & NFSEXP_NOSUBTREECHECK)) { | |
436 | dprintk("%s: %s does not support subtree checking!\n", | |
437 | __func__, inode->i_sb->s_type->name); | |
438 | return -EINVAL; | |
439 | } | |
1da177e4 | 440 | return 0; |
1da177e4 LT |
441 | } |
442 | ||
93346919 MN |
443 | #ifdef CONFIG_NFSD_V4 |
444 | ||
445 | static int | |
446 | fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc) | |
447 | { | |
448 | int len; | |
449 | int migrated, i, err; | |
450 | ||
be69da80 KM |
451 | /* more than one fsloc */ |
452 | if (fsloc->locations) | |
453 | return -EINVAL; | |
454 | ||
93346919 | 455 | /* listsize */ |
a007c4c3 | 456 | err = get_uint(mesg, &fsloc->locations_count); |
93346919 MN |
457 | if (err) |
458 | return err; | |
459 | if (fsloc->locations_count > MAX_FS_LOCATIONS) | |
460 | return -EINVAL; | |
461 | if (fsloc->locations_count == 0) | |
462 | return 0; | |
463 | ||
6396bb22 KC |
464 | fsloc->locations = kcalloc(fsloc->locations_count, |
465 | sizeof(struct nfsd4_fs_location), | |
466 | GFP_KERNEL); | |
93346919 MN |
467 | if (!fsloc->locations) |
468 | return -ENOMEM; | |
469 | for (i=0; i < fsloc->locations_count; i++) { | |
470 | /* colon separated host list */ | |
471 | err = -EINVAL; | |
472 | len = qword_get(mesg, buf, PAGE_SIZE); | |
473 | if (len <= 0) | |
474 | goto out_free_all; | |
475 | err = -ENOMEM; | |
476 | fsloc->locations[i].hosts = kstrdup(buf, GFP_KERNEL); | |
477 | if (!fsloc->locations[i].hosts) | |
478 | goto out_free_all; | |
479 | err = -EINVAL; | |
480 | /* slash separated path component list */ | |
481 | len = qword_get(mesg, buf, PAGE_SIZE); | |
482 | if (len <= 0) | |
483 | goto out_free_all; | |
484 | err = -ENOMEM; | |
485 | fsloc->locations[i].path = kstrdup(buf, GFP_KERNEL); | |
486 | if (!fsloc->locations[i].path) | |
487 | goto out_free_all; | |
488 | } | |
489 | /* migrated */ | |
490 | err = get_int(mesg, &migrated); | |
491 | if (err) | |
492 | goto out_free_all; | |
493 | err = -EINVAL; | |
494 | if (migrated < 0 || migrated > 1) | |
495 | goto out_free_all; | |
496 | fsloc->migrated = migrated; | |
497 | return 0; | |
498 | out_free_all: | |
499 | nfsd4_fslocs_free(fsloc); | |
500 | return err; | |
501 | } | |
502 | ||
e677bfe4 AA |
503 | static int secinfo_parse(char **mesg, char *buf, struct svc_export *exp) |
504 | { | |
e677bfe4 | 505 | struct exp_flavor_info *f; |
1f53146d KM |
506 | u32 listsize; |
507 | int err; | |
e677bfe4 | 508 | |
be69da80 KM |
509 | /* more than one secinfo */ |
510 | if (exp->ex_nflavors) | |
511 | return -EINVAL; | |
512 | ||
1f53146d | 513 | err = get_uint(mesg, &listsize); |
e677bfe4 AA |
514 | if (err) |
515 | return err; | |
1f53146d | 516 | if (listsize > MAX_SECINFO_LIST) |
e677bfe4 AA |
517 | return -EINVAL; |
518 | ||
519 | for (f = exp->ex_flavors; f < exp->ex_flavors + listsize; f++) { | |
a007c4c3 | 520 | err = get_uint(mesg, &f->pseudoflavor); |
e677bfe4 AA |
521 | if (err) |
522 | return err; | |
523 | /* | |
80492e7d RK |
524 | * XXX: It would be nice to also check whether this |
525 | * pseudoflavor is supported, so we can discover the | |
526 | * problem at export time instead of when a client fails | |
527 | * to authenticate. | |
e677bfe4 | 528 | */ |
a007c4c3 | 529 | err = get_uint(mesg, &f->flags); |
e677bfe4 AA |
530 | if (err) |
531 | return err; | |
532 | /* Only some flags are allowed to differ between flavors: */ | |
533 | if (~NFSEXP_SECINFO_FLAGS & (f->flags ^ exp->ex_flags)) | |
534 | return -EINVAL; | |
535 | } | |
536 | exp->ex_nflavors = listsize; | |
537 | return 0; | |
538 | } | |
539 | ||
93346919 | 540 | #else /* CONFIG_NFSD_V4 */ |
e677bfe4 AA |
541 | static inline int |
542 | fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc){return 0;} | |
543 | static inline int | |
544 | secinfo_parse(char **mesg, char *buf, struct svc_export *exp) { return 0; } | |
93346919 MN |
545 | #endif |
546 | ||
9280c577 CL |
547 | static int xprtsec_parse(char **mesg, char *buf, struct svc_export *exp) |
548 | { | |
549 | unsigned int i, mode, listsize; | |
550 | int err; | |
551 | ||
552 | err = get_uint(mesg, &listsize); | |
553 | if (err) | |
554 | return err; | |
555 | if (listsize > NFSEXP_XPRTSEC_NUM) | |
556 | return -EINVAL; | |
557 | ||
558 | exp->ex_xprtsec_modes = 0; | |
559 | for (i = 0; i < listsize; i++) { | |
560 | err = get_uint(mesg, &mode); | |
561 | if (err) | |
562 | return err; | |
563 | if (mode > NFSEXP_XPRTSEC_MTLS) | |
564 | return -EINVAL; | |
565 | exp->ex_xprtsec_modes |= mode; | |
566 | } | |
567 | return 0; | |
568 | } | |
569 | ||
0d63790c | 570 | static inline int |
12ce5f8c | 571 | nfsd_uuid_parse(char **mesg, char *buf, unsigned char **puuid) |
0d63790c KM |
572 | { |
573 | int len; | |
574 | ||
be69da80 KM |
575 | /* more than one uuid */ |
576 | if (*puuid) | |
577 | return -EINVAL; | |
578 | ||
0d63790c KM |
579 | /* expect a 16 byte uuid encoded as \xXXXX... */ |
580 | len = qword_get(mesg, buf, PAGE_SIZE); | |
94eb3689 | 581 | if (len != EX_UUID_LEN) |
0d63790c KM |
582 | return -EINVAL; |
583 | ||
94eb3689 | 584 | *puuid = kmemdup(buf, EX_UUID_LEN, GFP_KERNEL); |
0d63790c KM |
585 | if (*puuid == NULL) |
586 | return -ENOMEM; | |
587 | ||
588 | return 0; | |
589 | } | |
590 | ||
1da177e4 LT |
591 | static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen) |
592 | { | |
593 | /* client path expiry [flags anonuid anongid fsid] */ | |
594 | char *buf; | |
1da177e4 LT |
595 | int err; |
596 | struct auth_domain *dom = NULL; | |
c1a2a475 | 597 | struct svc_export exp = {}, *expp; |
1da177e4 LT |
598 | int an_int; |
599 | ||
1da177e4 LT |
600 | if (mesg[mlen-1] != '\n') |
601 | return -EINVAL; | |
602 | mesg[mlen-1] = 0; | |
603 | ||
604 | buf = kmalloc(PAGE_SIZE, GFP_KERNEL); | |
c1a2a475 AV |
605 | if (!buf) |
606 | return -ENOMEM; | |
1da177e4 LT |
607 | |
608 | /* client */ | |
1da177e4 | 609 | err = -EINVAL; |
75bfb704 | 610 | if (qword_get(&mesg, buf, PAGE_SIZE) <= 0) |
c1a2a475 | 611 | goto out; |
1da177e4 LT |
612 | |
613 | err = -ENOENT; | |
614 | dom = auth_domain_find(buf); | |
615 | if (!dom) | |
616 | goto out; | |
617 | ||
618 | /* path */ | |
619 | err = -EINVAL; | |
75bfb704 | 620 | if (qword_get(&mesg, buf, PAGE_SIZE) <= 0) |
c1a2a475 AV |
621 | goto out1; |
622 | ||
623 | err = kern_path(buf, 0, &exp.ex_path); | |
624 | if (err) | |
625 | goto out1; | |
1da177e4 | 626 | |
1da177e4 | 627 | exp.ex_client = dom; |
db3a3532 | 628 | exp.cd = cd; |
9cf514cc | 629 | exp.ex_devid_map = NULL; |
9280c577 | 630 | exp.ex_xprtsec_modes = NFSEXP_XPRTSEC_ALL; |
c1a2a475 | 631 | |
1da177e4 | 632 | /* expiry */ |
cf64b9bc N |
633 | err = get_expiry(&mesg, &exp.h.expiry_time); |
634 | if (err) | |
c1a2a475 | 635 | goto out3; |
1da177e4 LT |
636 | |
637 | /* flags */ | |
638 | err = get_int(&mesg, &an_int); | |
4a4b8831 BF |
639 | if (err == -ENOENT) { |
640 | err = 0; | |
1da177e4 | 641 | set_bit(CACHE_NEGATIVE, &exp.h.flags); |
4a4b8831 | 642 | } else { |
c1a2a475 AV |
643 | if (err || an_int < 0) |
644 | goto out3; | |
1da177e4 | 645 | exp.ex_flags= an_int; |
cf64b9bc | 646 | |
1da177e4 LT |
647 | /* anon uid */ |
648 | err = get_int(&mesg, &an_int); | |
c1a2a475 AV |
649 | if (err) |
650 | goto out3; | |
e45d1a18 | 651 | exp.ex_anon_uid= make_kuid(current_user_ns(), an_int); |
1da177e4 LT |
652 | |
653 | /* anon gid */ | |
654 | err = get_int(&mesg, &an_int); | |
c1a2a475 AV |
655 | if (err) |
656 | goto out3; | |
e45d1a18 | 657 | exp.ex_anon_gid= make_kgid(current_user_ns(), an_int); |
1da177e4 LT |
658 | |
659 | /* fsid */ | |
660 | err = get_int(&mesg, &an_int); | |
c1a2a475 AV |
661 | if (err) |
662 | goto out3; | |
1da177e4 LT |
663 | exp.ex_fsid = an_int; |
664 | ||
75bfb704 | 665 | while (qword_get(&mesg, buf, PAGE_SIZE) > 0) { |
af6a4e28 N |
666 | if (strcmp(buf, "fsloc") == 0) |
667 | err = fsloc_parse(&mesg, buf, &exp.ex_fslocs); | |
0d63790c | 668 | else if (strcmp(buf, "uuid") == 0) |
12ce5f8c | 669 | err = nfsd_uuid_parse(&mesg, buf, &exp.ex_uuid); |
0d63790c | 670 | else if (strcmp(buf, "secinfo") == 0) |
e677bfe4 | 671 | err = secinfo_parse(&mesg, buf, &exp); |
9280c577 CL |
672 | else if (strcmp(buf, "xprtsec") == 0) |
673 | err = xprtsec_parse(&mesg, buf, &exp); | |
e677bfe4 | 674 | else |
af6a4e28 N |
675 | /* quietly ignore unknown words and anything |
676 | * following. Newer user-space can try to set | |
677 | * new values, then see what the result was. | |
678 | */ | |
679 | break; | |
680 | if (err) | |
c1a2a475 | 681 | goto out4; |
af6a4e28 | 682 | } |
93346919 | 683 | |
899bf2ce | 684 | err = check_export(&exp.ex_path, &exp.ex_flags, exp.ex_uuid); |
c1a2a475 AV |
685 | if (err) |
686 | goto out4; | |
9280c577 | 687 | |
6f6cc320 BF |
688 | /* |
689 | * No point caching this if it would immediately expire. | |
690 | * Also, this protects exportfs's dummy export from the | |
691 | * anon_uid/anon_gid checks: | |
692 | */ | |
693 | if (exp.h.expiry_time < seconds_since_boot()) | |
694 | goto out4; | |
427d6c66 BF |
695 | /* |
696 | * For some reason exportfs has been passing down an | |
697 | * invalid (-1) uid & gid on the "dummy" export which it | |
698 | * uses to test export support. To make sure exportfs | |
699 | * sees errors from check_export we therefore need to | |
700 | * delay these checks till after check_export: | |
701 | */ | |
6f6cc320 | 702 | err = -EINVAL; |
427d6c66 BF |
703 | if (!uid_valid(exp.ex_anon_uid)) |
704 | goto out4; | |
705 | if (!gid_valid(exp.ex_anon_gid)) | |
706 | goto out4; | |
6f6cc320 | 707 | err = 0; |
9cf514cc CH |
708 | |
709 | nfsd4_setup_layout_type(&exp); | |
1da177e4 LT |
710 | } |
711 | ||
4f7774c3 | 712 | expp = svc_export_lookup(&exp); |
6a30e47f | 713 | if (!expp) { |
4f7774c3 | 714 | err = -ENOMEM; |
6a30e47f TM |
715 | goto out4; |
716 | } | |
717 | expp = svc_export_update(&exp, expp); | |
718 | if (expp) { | |
719 | trace_nfsd_export_update(expp); | |
720 | cache_flush(); | |
4f7774c3 | 721 | exp_put(expp); |
6a30e47f TM |
722 | } else |
723 | err = -ENOMEM; | |
c1a2a475 | 724 | out4: |
af6a4e28 N |
725 | nfsd4_fslocs_free(&exp.ex_fslocs); |
726 | kfree(exp.ex_uuid); | |
c1a2a475 | 727 | out3: |
c1a2a475 AV |
728 | path_put(&exp.ex_path); |
729 | out1: | |
730 | auth_domain_put(dom); | |
731 | out: | |
f99d49ad | 732 | kfree(buf); |
1da177e4 LT |
733 | return err; |
734 | } | |
735 | ||
93346919 | 736 | static void exp_flags(struct seq_file *m, int flag, int fsid, |
4c1e1b34 | 737 | kuid_t anonu, kgid_t anong, struct nfsd4_fs_locations *fslocs); |
91fe39d3 | 738 | static void show_secinfo(struct seq_file *m, struct svc_export *exp); |
1da177e4 | 739 | |
20ad856e AG |
740 | static int is_export_stats_file(struct seq_file *m) |
741 | { | |
742 | /* | |
743 | * The export_stats file uses the same ops as the exports file. | |
744 | * We use the file's name to determine the reported info per export. | |
745 | * There is no rename in nsfdfs, so d_name.name is stable. | |
746 | */ | |
747 | return !strcmp(m->file->f_path.dentry->d_name.name, "export_stats"); | |
748 | } | |
749 | ||
1da177e4 LT |
750 | static int svc_export_show(struct seq_file *m, |
751 | struct cache_detail *cd, | |
752 | struct cache_head *h) | |
753 | { | |
20ad856e AG |
754 | struct svc_export *exp; |
755 | bool export_stats = is_export_stats_file(m); | |
1da177e4 | 756 | |
20ad856e AG |
757 | if (h == NULL) { |
758 | if (export_stats) | |
759 | seq_puts(m, "#path domain start-time\n#\tstats\n"); | |
760 | else | |
761 | seq_puts(m, "#path domain(flags)\n"); | |
1da177e4 LT |
762 | return 0; |
763 | } | |
764 | exp = container_of(h, struct svc_export, h); | |
c32c2f63 | 765 | seq_path(m, &exp->ex_path, " \t\n\\"); |
1da177e4 LT |
766 | seq_putc(m, '\t'); |
767 | seq_escape(m, exp->ex_client->name, " \t\n\\"); | |
20ad856e AG |
768 | if (export_stats) { |
769 | seq_printf(m, "\t%lld\n", exp->ex_stats.start_time); | |
770 | seq_printf(m, "\tfh_stale: %lld\n", | |
771 | percpu_counter_sum_positive(&exp->ex_stats.counter[EXP_STATS_FH_STALE])); | |
772 | seq_printf(m, "\tio_read: %lld\n", | |
773 | percpu_counter_sum_positive(&exp->ex_stats.counter[EXP_STATS_IO_READ])); | |
774 | seq_printf(m, "\tio_write: %lld\n", | |
775 | percpu_counter_sum_positive(&exp->ex_stats.counter[EXP_STATS_IO_WRITE])); | |
776 | seq_putc(m, '\n'); | |
777 | return 0; | |
778 | } | |
1da177e4 | 779 | seq_putc(m, '('); |
20ad856e | 780 | if (test_bit(CACHE_VALID, &h->flags) && |
af6a4e28 | 781 | !test_bit(CACHE_NEGATIVE, &h->flags)) { |
93346919 MN |
782 | exp_flags(m, exp->ex_flags, exp->ex_fsid, |
783 | exp->ex_anon_uid, exp->ex_anon_gid, &exp->ex_fslocs); | |
af6a4e28 N |
784 | if (exp->ex_uuid) { |
785 | int i; | |
786 | seq_puts(m, ",uuid="); | |
94eb3689 | 787 | for (i = 0; i < EX_UUID_LEN; i++) { |
af6a4e28 N |
788 | if ((i&3) == 0 && i) |
789 | seq_putc(m, ':'); | |
790 | seq_printf(m, "%02x", exp->ex_uuid[i]); | |
791 | } | |
792 | } | |
91fe39d3 | 793 | show_secinfo(m, exp); |
af6a4e28 | 794 | } |
1da177e4 LT |
795 | seq_puts(m, ")\n"); |
796 | return 0; | |
797 | } | |
4f7774c3 | 798 | static int svc_export_match(struct cache_head *a, struct cache_head *b) |
1da177e4 | 799 | { |
4f7774c3 N |
800 | struct svc_export *orig = container_of(a, struct svc_export, h); |
801 | struct svc_export *new = container_of(b, struct svc_export, h); | |
802 | return orig->ex_client == new->ex_client && | |
b77a4b2e | 803 | path_equal(&orig->ex_path, &new->ex_path); |
1da177e4 | 804 | } |
4f7774c3 N |
805 | |
806 | static void svc_export_init(struct cache_head *cnew, struct cache_head *citem) | |
1da177e4 | 807 | { |
4f7774c3 N |
808 | struct svc_export *new = container_of(cnew, struct svc_export, h); |
809 | struct svc_export *item = container_of(citem, struct svc_export, h); | |
810 | ||
efc36aa5 | 811 | kref_get(&item->ex_client->ref); |
1da177e4 | 812 | new->ex_client = item->ex_client; |
0da22a91 KM |
813 | new->ex_path = item->ex_path; |
814 | path_get(&item->ex_path); | |
93346919 MN |
815 | new->ex_fslocs.locations = NULL; |
816 | new->ex_fslocs.locations_count = 0; | |
817 | new->ex_fslocs.migrated = 0; | |
8a4c3926 | 818 | new->ex_layout_types = 0; |
2eeb9b2a | 819 | new->ex_uuid = NULL; |
db3a3532 | 820 | new->cd = item->cd; |
20ad856e | 821 | export_stats_reset(&new->ex_stats); |
1da177e4 LT |
822 | } |
823 | ||
4f7774c3 | 824 | static void export_update(struct cache_head *cnew, struct cache_head *citem) |
1da177e4 | 825 | { |
4f7774c3 N |
826 | struct svc_export *new = container_of(cnew, struct svc_export, h); |
827 | struct svc_export *item = container_of(citem, struct svc_export, h); | |
e677bfe4 | 828 | int i; |
4f7774c3 | 829 | |
1da177e4 LT |
830 | new->ex_flags = item->ex_flags; |
831 | new->ex_anon_uid = item->ex_anon_uid; | |
832 | new->ex_anon_gid = item->ex_anon_gid; | |
833 | new->ex_fsid = item->ex_fsid; | |
9cf514cc CH |
834 | new->ex_devid_map = item->ex_devid_map; |
835 | item->ex_devid_map = NULL; | |
af6a4e28 N |
836 | new->ex_uuid = item->ex_uuid; |
837 | item->ex_uuid = NULL; | |
93346919 MN |
838 | new->ex_fslocs.locations = item->ex_fslocs.locations; |
839 | item->ex_fslocs.locations = NULL; | |
840 | new->ex_fslocs.locations_count = item->ex_fslocs.locations_count; | |
841 | item->ex_fslocs.locations_count = 0; | |
842 | new->ex_fslocs.migrated = item->ex_fslocs.migrated; | |
843 | item->ex_fslocs.migrated = 0; | |
8a4c3926 | 844 | new->ex_layout_types = item->ex_layout_types; |
e677bfe4 AA |
845 | new->ex_nflavors = item->ex_nflavors; |
846 | for (i = 0; i < MAX_SECINFO_LIST; i++) { | |
847 | new->ex_flavors[i] = item->ex_flavors[i]; | |
848 | } | |
9280c577 | 849 | new->ex_xprtsec_modes = item->ex_xprtsec_modes; |
1da177e4 LT |
850 | } |
851 | ||
4f7774c3 N |
852 | static struct cache_head *svc_export_alloc(void) |
853 | { | |
854 | struct svc_export *i = kmalloc(sizeof(*i), GFP_KERNEL); | |
20ad856e AG |
855 | if (!i) |
856 | return NULL; | |
857 | ||
858 | if (export_stats_init(&i->ex_stats)) { | |
859 | kfree(i); | |
4f7774c3 | 860 | return NULL; |
20ad856e AG |
861 | } |
862 | ||
863 | return &i->h; | |
4f7774c3 N |
864 | } |
865 | ||
ae2e408e | 866 | static const struct cache_detail svc_export_cache_template = { |
4f7774c3 N |
867 | .owner = THIS_MODULE, |
868 | .hash_size = EXPORT_HASHMAX, | |
4f7774c3 N |
869 | .name = "nfsd.export", |
870 | .cache_put = svc_export_put, | |
65286b88 | 871 | .cache_upcall = svc_export_upcall, |
73fb847a | 872 | .cache_request = svc_export_request, |
4f7774c3 N |
873 | .cache_parse = svc_export_parse, |
874 | .cache_show = svc_export_show, | |
875 | .match = svc_export_match, | |
876 | .init = svc_export_init, | |
877 | .update = export_update, | |
878 | .alloc = svc_export_alloc, | |
879 | }; | |
880 | ||
61f8603d N |
881 | static int |
882 | svc_export_hash(struct svc_export *exp) | |
4f7774c3 | 883 | { |
4f7774c3 | 884 | int hash; |
61f8603d | 885 | |
4f7774c3 | 886 | hash = hash_ptr(exp->ex_client, EXPORT_HASHBITS); |
54775491 JB |
887 | hash ^= hash_ptr(exp->ex_path.dentry, EXPORT_HASHBITS); |
888 | hash ^= hash_ptr(exp->ex_path.mnt, EXPORT_HASHBITS); | |
61f8603d N |
889 | return hash; |
890 | } | |
891 | ||
892 | static struct svc_export * | |
893 | svc_export_lookup(struct svc_export *exp) | |
894 | { | |
895 | struct cache_head *ch; | |
896 | int hash = svc_export_hash(exp); | |
4f7774c3 | 897 | |
9ceddd9d | 898 | ch = sunrpc_cache_lookup_rcu(exp->cd, &exp->h, hash); |
4f7774c3 N |
899 | if (ch) |
900 | return container_of(ch, struct svc_export, h); | |
901 | else | |
902 | return NULL; | |
903 | } | |
904 | ||
74cae61a | 905 | static struct svc_export * |
4f7774c3 N |
906 | svc_export_update(struct svc_export *new, struct svc_export *old) |
907 | { | |
908 | struct cache_head *ch; | |
61f8603d | 909 | int hash = svc_export_hash(old); |
4f7774c3 | 910 | |
db3a3532 | 911 | ch = sunrpc_cache_update(old->cd, &new->h, &old->h, hash); |
4f7774c3 N |
912 | if (ch) |
913 | return container_of(ch, struct svc_export, h); | |
914 | else | |
915 | return NULL; | |
916 | } | |
1da177e4 LT |
917 | |
918 | ||
74cae61a | 919 | static struct svc_expkey * |
e6d615f7 | 920 | exp_find_key(struct cache_detail *cd, struct auth_domain *clp, int fsid_type, |
c89172e3 | 921 | u32 *fsidv, struct cache_req *reqp) |
1da177e4 LT |
922 | { |
923 | struct svc_expkey key, *ek; | |
924 | int err; | |
925 | ||
926 | if (!clp) | |
2d3bb252 | 927 | return ERR_PTR(-ENOENT); |
1da177e4 LT |
928 | |
929 | key.ek_client = clp; | |
930 | key.ek_fsidtype = fsid_type; | |
931 | memcpy(key.ek_fsid, fsidv, key_len(fsid_type)); | |
932 | ||
c89172e3 | 933 | ek = svc_expkey_lookup(cd, &key); |
2d3bb252 BF |
934 | if (ek == NULL) |
935 | return ERR_PTR(-ENOMEM); | |
c89172e3 | 936 | err = cache_check(cd, &ek->h, reqp); |
cf749f3c TM |
937 | if (err) { |
938 | trace_nfsd_exp_find_key(&key, err); | |
2d3bb252 | 939 | return ERR_PTR(err); |
cf749f3c | 940 | } |
1da177e4 LT |
941 | return ek; |
942 | } | |
943 | ||
e6d615f7 KM |
944 | static struct svc_export * |
945 | exp_get_by_name(struct cache_detail *cd, struct auth_domain *clp, | |
946 | const struct path *path, struct cache_req *reqp) | |
1da177e4 LT |
947 | { |
948 | struct svc_export *exp, key; | |
2d3bb252 | 949 | int err; |
e83aece3 | 950 | |
1da177e4 | 951 | if (!clp) |
2d3bb252 | 952 | return ERR_PTR(-ENOENT); |
1da177e4 LT |
953 | |
954 | key.ex_client = clp; | |
55430e2e | 955 | key.ex_path = *path; |
2a75cfa6 | 956 | key.cd = cd; |
1da177e4 | 957 | |
4f7774c3 | 958 | exp = svc_export_lookup(&key); |
2d3bb252 BF |
959 | if (exp == NULL) |
960 | return ERR_PTR(-ENOMEM); | |
2a75cfa6 | 961 | err = cache_check(cd, &exp->h, reqp); |
cf749f3c TM |
962 | if (err) { |
963 | trace_nfsd_exp_get_by_name(&key, err); | |
2d3bb252 | 964 | return ERR_PTR(err); |
cf749f3c | 965 | } |
1da177e4 LT |
966 | return exp; |
967 | } | |
968 | ||
969 | /* | |
970 | * Find the export entry for a given dentry. | |
971 | */ | |
e6d615f7 KM |
972 | static struct svc_export * |
973 | exp_parent(struct cache_detail *cd, struct auth_domain *clp, struct path *path) | |
1da177e4 | 974 | { |
5bf3bd2b | 975 | struct dentry *saved = dget(path->dentry); |
e6d615f7 | 976 | struct svc_export *exp = exp_get_by_name(cd, clp, path, NULL); |
5bf3bd2b AV |
977 | |
978 | while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(path->dentry)) { | |
979 | struct dentry *parent = dget_parent(path->dentry); | |
980 | dput(path->dentry); | |
981 | path->dentry = parent; | |
2a75cfa6 | 982 | exp = exp_get_by_name(cd, clp, path, NULL); |
1da177e4 | 983 | } |
5bf3bd2b AV |
984 | dput(path->dentry); |
985 | path->dentry = saved; | |
1da177e4 LT |
986 | return exp; |
987 | } | |
988 | ||
1da177e4 | 989 | |
1da177e4 LT |
990 | |
991 | /* | |
992 | * Obtain the root fh on behalf of a client. | |
993 | * This could be done in user space, but I feel that it adds some safety | |
994 | * since its harder to fool a kernel module than a user space program. | |
995 | */ | |
996 | int | |
e6d615f7 | 997 | exp_rootfh(struct net *net, struct auth_domain *clp, char *name, |
2a75cfa6 | 998 | struct knfsd_fh *f, int maxsize) |
1da177e4 LT |
999 | { |
1000 | struct svc_export *exp; | |
a63bb996 | 1001 | struct path path; |
1da177e4 LT |
1002 | struct inode *inode; |
1003 | struct svc_fh fh; | |
1004 | int err; | |
b3853e0e SK |
1005 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1006 | struct cache_detail *cd = nn->svc_export_cache; | |
1da177e4 LT |
1007 | |
1008 | err = -EPERM; | |
1009 | /* NB: we probably ought to check that it's NUL-terminated */ | |
a63bb996 AV |
1010 | if (kern_path(name, 0, &path)) { |
1011 | printk("nfsd: exp_rootfh path not found %s", name); | |
1da177e4 LT |
1012 | return err; |
1013 | } | |
2b0143b5 | 1014 | inode = d_inode(path.dentry); |
1da177e4 LT |
1015 | |
1016 | dprintk("nfsd: exp_rootfh(%s [%p] %s:%s/%ld)\n", | |
a63bb996 | 1017 | name, path.dentry, clp->name, |
1da177e4 | 1018 | inode->i_sb->s_id, inode->i_ino); |
2a75cfa6 | 1019 | exp = exp_parent(cd, clp, &path); |
4b41bd85 BF |
1020 | if (IS_ERR(exp)) { |
1021 | err = PTR_ERR(exp); | |
1022 | goto out; | |
1023 | } | |
1da177e4 LT |
1024 | |
1025 | /* | |
1026 | * fh must be initialized before calling fh_compose | |
1027 | */ | |
1028 | fh_init(&fh, maxsize); | |
a63bb996 | 1029 | if (fh_compose(&fh, exp, path.dentry, NULL)) |
1da177e4 LT |
1030 | err = -EINVAL; |
1031 | else | |
1032 | err = 0; | |
1033 | memcpy(f, &fh.fh_handle, sizeof(struct knfsd_fh)); | |
1034 | fh_put(&fh); | |
1035 | exp_put(exp); | |
1036 | out: | |
a63bb996 | 1037 | path_put(&path); |
1da177e4 LT |
1038 | return err; |
1039 | } | |
1040 | ||
2a75cfa6 SK |
1041 | static struct svc_export *exp_find(struct cache_detail *cd, |
1042 | struct auth_domain *clp, int fsid_type, | |
cce76f9b | 1043 | u32 *fsidv, struct cache_req *reqp) |
eab7e2e6 N |
1044 | { |
1045 | struct svc_export *exp; | |
e5f06f72 SK |
1046 | struct nfsd_net *nn = net_generic(cd->net, nfsd_net_id); |
1047 | struct svc_expkey *ek = exp_find_key(nn->svc_expkey_cache, clp, fsid_type, fsidv, reqp); | |
2d3bb252 | 1048 | if (IS_ERR(ek)) |
e231c2ee | 1049 | return ERR_CAST(ek); |
eab7e2e6 | 1050 | |
2a75cfa6 | 1051 | exp = exp_get_by_name(cd, clp, &ek->ek_path, reqp); |
e5f06f72 | 1052 | cache_put(&ek->h, nn->svc_expkey_cache); |
eab7e2e6 | 1053 | |
2d3bb252 | 1054 | if (IS_ERR(exp)) |
e231c2ee | 1055 | return ERR_CAST(exp); |
eab7e2e6 N |
1056 | return exp; |
1057 | } | |
1058 | ||
32c1eb0c AA |
1059 | __be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp) |
1060 | { | |
9280c577 CL |
1061 | struct exp_flavor_info *f, *end = exp->ex_flavors + exp->ex_nflavors; |
1062 | struct svc_xprt *xprt = rqstp->rq_xprt; | |
1063 | ||
1064 | if (exp->ex_xprtsec_modes & NFSEXP_XPRTSEC_NONE) { | |
1065 | if (!test_bit(XPT_TLS_SESSION, &xprt->xpt_flags)) | |
1066 | goto ok; | |
1067 | } | |
1068 | if (exp->ex_xprtsec_modes & NFSEXP_XPRTSEC_TLS) { | |
1069 | if (test_bit(XPT_TLS_SESSION, &xprt->xpt_flags) && | |
1070 | !test_bit(XPT_PEER_AUTH, &xprt->xpt_flags)) | |
1071 | goto ok; | |
1072 | } | |
1073 | if (exp->ex_xprtsec_modes & NFSEXP_XPRTSEC_MTLS) { | |
1074 | if (test_bit(XPT_TLS_SESSION, &xprt->xpt_flags) && | |
1075 | test_bit(XPT_PEER_AUTH, &xprt->xpt_flags)) | |
1076 | goto ok; | |
1077 | } | |
1078 | goto denied; | |
32c1eb0c | 1079 | |
9280c577 | 1080 | ok: |
32c1eb0c AA |
1081 | /* legacy gss-only clients are always OK: */ |
1082 | if (exp->ex_client == rqstp->rq_gssclient) | |
1083 | return 0; | |
1084 | /* ip-address based client; check sec= export option: */ | |
1085 | for (f = exp->ex_flavors; f < end; f++) { | |
d5497fc6 | 1086 | if (f->pseudoflavor == rqstp->rq_cred.cr_flavor) |
32c1eb0c AA |
1087 | return 0; |
1088 | } | |
1089 | /* defaults in absence of sec= options: */ | |
1090 | if (exp->ex_nflavors == 0) { | |
d5497fc6 BF |
1091 | if (rqstp->rq_cred.cr_flavor == RPC_AUTH_NULL || |
1092 | rqstp->rq_cred.cr_flavor == RPC_AUTH_UNIX) | |
32c1eb0c AA |
1093 | return 0; |
1094 | } | |
ed941643 AE |
1095 | |
1096 | /* If the compound op contains a spo_must_allowed op, | |
1097 | * it will be sent with integrity/protection which | |
1098 | * will have to be expressly allowed on mounts that | |
1099 | * don't support it | |
1100 | */ | |
1101 | ||
1102 | if (nfsd4_spo_must_allow(rqstp)) | |
1103 | return 0; | |
1104 | ||
9280c577 | 1105 | denied: |
4b74fd79 | 1106 | return rqstp->rq_vers < 4 ? nfserr_acces : nfserr_wrongsec; |
32c1eb0c AA |
1107 | } |
1108 | ||
0989a788 | 1109 | /* |
2ea2209f BF |
1110 | * Uses rq_client and rq_gssclient to find an export; uses rq_client (an |
1111 | * auth_unix client) if it's available and has secinfo information; | |
1112 | * otherwise, will try to use rq_gssclient. | |
1113 | * | |
0989a788 BF |
1114 | * Called from functions that handle requests; functions that do work on |
1115 | * behalf of mountd are passed a single client name to use, and should | |
1116 | * use exp_get_by_name() or exp_find(). | |
1117 | */ | |
1118 | struct svc_export * | |
91c9fa8f | 1119 | rqst_exp_get_by_name(struct svc_rqst *rqstp, struct path *path) |
0989a788 | 1120 | { |
9a25b96c | 1121 | struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT); |
9695c705 | 1122 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b3853e0e | 1123 | struct cache_detail *cd = nn->svc_export_cache; |
2ea2209f BF |
1124 | |
1125 | if (rqstp->rq_client == NULL) | |
1126 | goto gss; | |
3ab4d8b1 | 1127 | |
2ea2209f | 1128 | /* First try the auth_unix client: */ |
2a75cfa6 | 1129 | exp = exp_get_by_name(cd, rqstp->rq_client, path, &rqstp->rq_chandle); |
2ea2209f BF |
1130 | if (PTR_ERR(exp) == -ENOENT) |
1131 | goto gss; | |
1132 | if (IS_ERR(exp)) | |
1133 | return exp; | |
1134 | /* If it has secinfo, assume there are no gss/... clients */ | |
1135 | if (exp->ex_nflavors > 0) | |
1136 | return exp; | |
1137 | gss: | |
1138 | /* Otherwise, try falling back on gss client */ | |
1139 | if (rqstp->rq_gssclient == NULL) | |
1140 | return exp; | |
2a75cfa6 | 1141 | gssexp = exp_get_by_name(cd, rqstp->rq_gssclient, path, &rqstp->rq_chandle); |
2ea2209f BF |
1142 | if (PTR_ERR(gssexp) == -ENOENT) |
1143 | return exp; | |
9a25b96c | 1144 | if (!IS_ERR(exp)) |
2ea2209f BF |
1145 | exp_put(exp); |
1146 | return gssexp; | |
0989a788 BF |
1147 | } |
1148 | ||
1149 | struct svc_export * | |
1150 | rqst_exp_find(struct svc_rqst *rqstp, int fsid_type, u32 *fsidv) | |
1151 | { | |
9a25b96c | 1152 | struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT); |
9695c705 | 1153 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b3853e0e | 1154 | struct cache_detail *cd = nn->svc_export_cache; |
2ea2209f BF |
1155 | |
1156 | if (rqstp->rq_client == NULL) | |
1157 | goto gss; | |
3ab4d8b1 | 1158 | |
2ea2209f | 1159 | /* First try the auth_unix client: */ |
2a75cfa6 SK |
1160 | exp = exp_find(cd, rqstp->rq_client, fsid_type, |
1161 | fsidv, &rqstp->rq_chandle); | |
2ea2209f BF |
1162 | if (PTR_ERR(exp) == -ENOENT) |
1163 | goto gss; | |
1164 | if (IS_ERR(exp)) | |
1165 | return exp; | |
1166 | /* If it has secinfo, assume there are no gss/... clients */ | |
1167 | if (exp->ex_nflavors > 0) | |
1168 | return exp; | |
1169 | gss: | |
1170 | /* Otherwise, try falling back on gss client */ | |
1171 | if (rqstp->rq_gssclient == NULL) | |
1172 | return exp; | |
2a75cfa6 | 1173 | gssexp = exp_find(cd, rqstp->rq_gssclient, fsid_type, fsidv, |
2ea2209f BF |
1174 | &rqstp->rq_chandle); |
1175 | if (PTR_ERR(gssexp) == -ENOENT) | |
1176 | return exp; | |
9a25b96c | 1177 | if (!IS_ERR(exp)) |
2ea2209f BF |
1178 | exp_put(exp); |
1179 | return gssexp; | |
0989a788 BF |
1180 | } |
1181 | ||
1182 | struct svc_export * | |
e64c390c | 1183 | rqst_exp_parent(struct svc_rqst *rqstp, struct path *path) |
0989a788 | 1184 | { |
e64c390c AV |
1185 | struct dentry *saved = dget(path->dentry); |
1186 | struct svc_export *exp = rqst_exp_get_by_name(rqstp, path); | |
2ea2209f | 1187 | |
e64c390c AV |
1188 | while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(path->dentry)) { |
1189 | struct dentry *parent = dget_parent(path->dentry); | |
1190 | dput(path->dentry); | |
1191 | path->dentry = parent; | |
1192 | exp = rqst_exp_get_by_name(rqstp, path); | |
2ea2209f | 1193 | } |
e64c390c AV |
1194 | dput(path->dentry); |
1195 | path->dentry = saved; | |
2ea2209f | 1196 | return exp; |
0989a788 | 1197 | } |
eab7e2e6 | 1198 | |
ed748aac | 1199 | struct svc_export *rqst_find_fsidzero_export(struct svc_rqst *rqstp) |
f39bde24 | 1200 | { |
f39bde24 BF |
1201 | u32 fsidv[2]; |
1202 | ||
1203 | mk_fsid(FSID_NUM, fsidv, 0, 0, 0, NULL); | |
1204 | ||
260c64d2 | 1205 | return rqst_exp_find(rqstp, FSID_NUM, fsidv); |
f39bde24 BF |
1206 | } |
1207 | ||
1da177e4 LT |
1208 | /* |
1209 | * Called when we need the filehandle for the root of the pseudofs, | |
1210 | * for a given NFSv4 client. The root is defined to be the | |
1211 | * export point with fsid==0 | |
1212 | */ | |
c7afef1f | 1213 | __be32 |
df547efb | 1214 | exp_pseudoroot(struct svc_rqst *rqstp, struct svc_fh *fhp) |
1da177e4 | 1215 | { |
eab7e2e6 | 1216 | struct svc_export *exp; |
c7afef1f | 1217 | __be32 rv; |
1da177e4 | 1218 | |
ed748aac | 1219 | exp = rqst_find_fsidzero_export(rqstp); |
6899320c BF |
1220 | if (IS_ERR(exp)) |
1221 | return nfserrno(PTR_ERR(exp)); | |
54775491 | 1222 | rv = fh_compose(fhp, exp, exp->ex_path.dentry, NULL); |
d0ebd9c0 | 1223 | exp_put(exp); |
1da177e4 LT |
1224 | return rv; |
1225 | } | |
1226 | ||
1da177e4 LT |
1227 | static struct flags { |
1228 | int flag; | |
1229 | char *name[2]; | |
1230 | } expflags[] = { | |
1231 | { NFSEXP_READONLY, {"ro", "rw"}}, | |
1232 | { NFSEXP_INSECURE_PORT, {"insecure", ""}}, | |
1233 | { NFSEXP_ROOTSQUASH, {"root_squash", "no_root_squash"}}, | |
1234 | { NFSEXP_ALLSQUASH, {"all_squash", ""}}, | |
1235 | { NFSEXP_ASYNC, {"async", "sync"}}, | |
1236 | { NFSEXP_GATHERED_WRITES, {"wdelay", "no_wdelay"}}, | |
18c01ab3 | 1237 | { NFSEXP_NOREADDIRPLUS, {"nordirplus", ""}}, |
1da177e4 LT |
1238 | { NFSEXP_NOHIDE, {"nohide", ""}}, |
1239 | { NFSEXP_CROSSMOUNT, {"crossmnt", ""}}, | |
1240 | { NFSEXP_NOSUBTREECHECK, {"no_subtree_check", ""}}, | |
1241 | { NFSEXP_NOAUTHNLM, {"insecure_locks", ""}}, | |
eb4c86c6 | 1242 | { NFSEXP_V4ROOT, {"v4root", ""}}, |
9b3075c5 | 1243 | { NFSEXP_PNFS, {"pnfs", ""}}, |
32ddd944 | 1244 | { NFSEXP_SECURITY_LABEL, {"security_label", ""}}, |
1da177e4 LT |
1245 | { 0, {"", ""}} |
1246 | }; | |
1247 | ||
ac34cdb0 | 1248 | static void show_expflags(struct seq_file *m, int flags, int mask) |
1da177e4 | 1249 | { |
1da177e4 | 1250 | struct flags *flg; |
ac34cdb0 | 1251 | int state, first = 0; |
1da177e4 LT |
1252 | |
1253 | for (flg = expflags; flg->flag; flg++) { | |
ac34cdb0 BF |
1254 | if (flg->flag & ~mask) |
1255 | continue; | |
1256 | state = (flg->flag & flags) ? 0 : 1; | |
1da177e4 LT |
1257 | if (*flg->name[state]) |
1258 | seq_printf(m, "%s%s", first++?",":"", flg->name[state]); | |
1259 | } | |
ac34cdb0 BF |
1260 | } |
1261 | ||
91fe39d3 BF |
1262 | static void show_secinfo_flags(struct seq_file *m, int flags) |
1263 | { | |
1264 | seq_printf(m, ","); | |
1265 | show_expflags(m, flags, NFSEXP_SECINFO_FLAGS); | |
1266 | } | |
1267 | ||
74ec1e12 BF |
1268 | static bool secinfo_flags_equal(int f, int g) |
1269 | { | |
1270 | f &= NFSEXP_SECINFO_FLAGS; | |
1271 | g &= NFSEXP_SECINFO_FLAGS; | |
1272 | return f == g; | |
1273 | } | |
1274 | ||
1275 | static int show_secinfo_run(struct seq_file *m, struct exp_flavor_info **fp, struct exp_flavor_info *end) | |
1276 | { | |
1277 | int flags; | |
1278 | ||
1279 | flags = (*fp)->flags; | |
1280 | seq_printf(m, ",sec=%d", (*fp)->pseudoflavor); | |
1281 | (*fp)++; | |
1282 | while (*fp != end && secinfo_flags_equal(flags, (*fp)->flags)) { | |
1283 | seq_printf(m, ":%d", (*fp)->pseudoflavor); | |
1284 | (*fp)++; | |
1285 | } | |
1286 | return flags; | |
1287 | } | |
1288 | ||
91fe39d3 BF |
1289 | static void show_secinfo(struct seq_file *m, struct svc_export *exp) |
1290 | { | |
1291 | struct exp_flavor_info *f; | |
1292 | struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors; | |
74ec1e12 | 1293 | int flags; |
91fe39d3 BF |
1294 | |
1295 | if (exp->ex_nflavors == 0) | |
1296 | return; | |
74ec1e12 BF |
1297 | f = exp->ex_flavors; |
1298 | flags = show_secinfo_run(m, &f, end); | |
1299 | if (!secinfo_flags_equal(flags, exp->ex_flags)) | |
1300 | show_secinfo_flags(m, flags); | |
1301 | while (f != end) { | |
1302 | flags = show_secinfo_run(m, &f, end); | |
1303 | show_secinfo_flags(m, flags); | |
91fe39d3 | 1304 | } |
91fe39d3 BF |
1305 | } |
1306 | ||
ac34cdb0 | 1307 | static void exp_flags(struct seq_file *m, int flag, int fsid, |
4c1e1b34 | 1308 | kuid_t anonu, kgid_t anong, struct nfsd4_fs_locations *fsloc) |
ac34cdb0 | 1309 | { |
e45d1a18 TM |
1310 | struct user_namespace *userns = m->file->f_cred->user_ns; |
1311 | ||
ac34cdb0 | 1312 | show_expflags(m, flag, NFSEXP_ALLFLAGS); |
1da177e4 | 1313 | if (flag & NFSEXP_FSID) |
ac34cdb0 | 1314 | seq_printf(m, ",fsid=%d", fsid); |
e45d1a18 TM |
1315 | if (!uid_eq(anonu, make_kuid(userns, (uid_t)-2)) && |
1316 | !uid_eq(anonu, make_kuid(userns, 0x10000-2))) | |
1317 | seq_printf(m, ",anonuid=%u", from_kuid_munged(userns, anonu)); | |
1318 | if (!gid_eq(anong, make_kgid(userns, (gid_t)-2)) && | |
1319 | !gid_eq(anong, make_kgid(userns, 0x10000-2))) | |
1320 | seq_printf(m, ",anongid=%u", from_kgid_munged(userns, anong)); | |
93346919 MN |
1321 | if (fsloc && fsloc->locations_count > 0) { |
1322 | char *loctype = (fsloc->migrated) ? "refer" : "replicas"; | |
1323 | int i; | |
1324 | ||
ac34cdb0 | 1325 | seq_printf(m, ",%s=", loctype); |
93346919 MN |
1326 | seq_escape(m, fsloc->locations[0].path, ",;@ \t\n\\"); |
1327 | seq_putc(m, '@'); | |
1328 | seq_escape(m, fsloc->locations[0].hosts, ",;@ \t\n\\"); | |
1329 | for (i = 1; i < fsloc->locations_count; i++) { | |
1330 | seq_putc(m, ';'); | |
1331 | seq_escape(m, fsloc->locations[i].path, ",;@ \t\n\\"); | |
1332 | seq_putc(m, '@'); | |
1333 | seq_escape(m, fsloc->locations[i].hosts, ",;@ \t\n\\"); | |
1334 | } | |
1335 | } | |
1da177e4 LT |
1336 | } |
1337 | ||
1338 | static int e_show(struct seq_file *m, void *p) | |
1339 | { | |
1340 | struct cache_head *cp = p; | |
1341 | struct svc_export *exp = container_of(cp, struct svc_export, h); | |
f2c7ea10 | 1342 | struct cache_detail *cd = m->private; |
20ad856e | 1343 | bool export_stats = is_export_stats_file(m); |
1da177e4 | 1344 | |
bc6f02e5 | 1345 | if (p == SEQ_START_TOKEN) { |
1da177e4 | 1346 | seq_puts(m, "# Version 1.1\n"); |
20ad856e AG |
1347 | if (export_stats) |
1348 | seq_puts(m, "# Path Client Start-time\n#\tStats\n"); | |
1349 | else | |
1350 | seq_puts(m, "# Path Client(Flags) # IPs\n"); | |
1da177e4 LT |
1351 | return 0; |
1352 | } | |
1353 | ||
bf18f163 | 1354 | exp_get(exp); |
f2c7ea10 | 1355 | if (cache_check(cd, &exp->h, NULL)) |
1da177e4 | 1356 | return 0; |
a09581f2 | 1357 | exp_put(exp); |
f2c7ea10 | 1358 | return svc_export_show(m, cd, cp); |
1da177e4 LT |
1359 | } |
1360 | ||
88e9d34c | 1361 | const struct seq_operations nfs_exports_op = { |
9ceddd9d TM |
1362 | .start = cache_seq_start_rcu, |
1363 | .next = cache_seq_next_rcu, | |
1364 | .stop = cache_seq_stop_rcu, | |
1da177e4 LT |
1365 | .show = e_show, |
1366 | }; | |
1367 | ||
1da177e4 LT |
1368 | /* |
1369 | * Initialize the exports module. | |
1370 | */ | |
dbf847ec | 1371 | int |
b89109be | 1372 | nfsd_export_init(struct net *net) |
1da177e4 | 1373 | { |
dbf847ec | 1374 | int rv; |
b3853e0e SK |
1375 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1376 | ||
ba589528 | 1377 | dprintk("nfsd: initializing export module (net: %x).\n", net->ns.inum); |
1da177e4 | 1378 | |
b3853e0e SK |
1379 | nn->svc_export_cache = cache_create_net(&svc_export_cache_template, net); |
1380 | if (IS_ERR(nn->svc_export_cache)) | |
1381 | return PTR_ERR(nn->svc_export_cache); | |
1382 | rv = cache_register_net(nn->svc_export_cache, net); | |
dbf847ec | 1383 | if (rv) |
b3853e0e SK |
1384 | goto destroy_export_cache; |
1385 | ||
e5f06f72 SK |
1386 | nn->svc_expkey_cache = cache_create_net(&svc_expkey_cache_template, net); |
1387 | if (IS_ERR(nn->svc_expkey_cache)) { | |
1388 | rv = PTR_ERR(nn->svc_expkey_cache); | |
b3853e0e | 1389 | goto unregister_export_cache; |
e5f06f72 SK |
1390 | } |
1391 | rv = cache_register_net(nn->svc_expkey_cache, net); | |
1392 | if (rv) | |
1393 | goto destroy_expkey_cache; | |
b3853e0e | 1394 | return 0; |
1da177e4 | 1395 | |
e5f06f72 SK |
1396 | destroy_expkey_cache: |
1397 | cache_destroy_net(nn->svc_expkey_cache, net); | |
b3853e0e SK |
1398 | unregister_export_cache: |
1399 | cache_unregister_net(nn->svc_export_cache, net); | |
1400 | destroy_export_cache: | |
1401 | cache_destroy_net(nn->svc_export_cache, net); | |
1402 | return rv; | |
1da177e4 LT |
1403 | } |
1404 | ||
1405 | /* | |
1406 | * Flush exports table - called when last nfsd thread is killed | |
1407 | */ | |
1408 | void | |
b3853e0e | 1409 | nfsd_export_flush(struct net *net) |
1da177e4 | 1410 | { |
b3853e0e SK |
1411 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1412 | ||
e5f06f72 | 1413 | cache_purge(nn->svc_expkey_cache); |
b3853e0e | 1414 | cache_purge(nn->svc_export_cache); |
1da177e4 LT |
1415 | } |
1416 | ||
1417 | /* | |
1418 | * Shutdown the exports module. | |
1419 | */ | |
1420 | void | |
b89109be | 1421 | nfsd_export_shutdown(struct net *net) |
1da177e4 | 1422 | { |
b3853e0e | 1423 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 1424 | |
ba589528 | 1425 | dprintk("nfsd: shutting down export module (net: %x).\n", net->ns.inum); |
1da177e4 | 1426 | |
e5f06f72 | 1427 | cache_unregister_net(nn->svc_expkey_cache, net); |
b3853e0e | 1428 | cache_unregister_net(nn->svc_export_cache, net); |
e5f06f72 | 1429 | cache_destroy_net(nn->svc_expkey_cache, net); |
b3853e0e | 1430 | cache_destroy_net(nn->svc_export_cache, net); |
e5f06f72 | 1431 | svcauth_unix_purge(net); |
1da177e4 | 1432 | |
ba589528 | 1433 | dprintk("nfsd: export shutdown complete (net: %x).\n", net->ns.inum); |
1da177e4 | 1434 | } |