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Commit | Line | Data |
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1da177e4 LT |
1 | #define MSNFS /* HACK HACK */ |
2 | /* | |
3 | * linux/fs/nfsd/export.c | |
4 | * | |
5 | * NFS exporting and validation. | |
6 | * | |
7 | * We maintain a list of clients, each of which has a list of | |
8 | * exports. To export an fs to a given client, you first have | |
9 | * to create the client entry with NFSCTL_ADDCLIENT, which | |
10 | * creates a client control block and adds it to the hash | |
11 | * table. Then, you call NFSCTL_EXPORT for each fs. | |
12 | * | |
13 | * | |
14 | * Copyright (C) 1995, 1996 Olaf Kirch, <okir@monad.swb.de> | |
15 | */ | |
16 | ||
17 | #include <linux/unistd.h> | |
18 | #include <linux/slab.h> | |
1da177e4 LT |
19 | #include <linux/stat.h> |
20 | #include <linux/in.h> | |
21 | #include <linux/seq_file.h> | |
22 | #include <linux/syscalls.h> | |
23 | #include <linux/rwsem.h> | |
24 | #include <linux/dcache.h> | |
25 | #include <linux/namei.h> | |
26 | #include <linux/mount.h> | |
27 | #include <linux/hash.h> | |
f35279d3 | 28 | #include <linux/module.h> |
a5694255 | 29 | #include <linux/exportfs.h> |
1da177e4 LT |
30 | |
31 | #include <linux/sunrpc/svc.h> | |
32 | #include <linux/nfsd/nfsd.h> | |
33 | #include <linux/nfsd/nfsfh.h> | |
34 | #include <linux/nfsd/syscall.h> | |
35 | #include <linux/lockd/bind.h> | |
e677bfe4 AA |
36 | #include <linux/sunrpc/msg_prot.h> |
37 | #include <linux/sunrpc/gss_api.h> | |
1da177e4 LT |
38 | |
39 | #define NFSDDBG_FACILITY NFSDDBG_EXPORT | |
1da177e4 LT |
40 | |
41 | typedef struct auth_domain svc_client; | |
42 | typedef struct svc_export svc_export; | |
43 | ||
44 | static void exp_do_unexport(svc_export *unexp); | |
45 | static int exp_verify_string(char *cp, int max); | |
46 | ||
47 | /* | |
48 | * We have two caches. | |
49 | * One maps client+vfsmnt+dentry to export options - the export map | |
50 | * The other maps client+filehandle-fragment to export options. - the expkey map | |
51 | * | |
52 | * The export options are actually stored in the first map, and the | |
53 | * second map contains a reference to the entry in the first map. | |
54 | */ | |
55 | ||
56 | #define EXPKEY_HASHBITS 8 | |
57 | #define EXPKEY_HASHMAX (1 << EXPKEY_HASHBITS) | |
58 | #define EXPKEY_HASHMASK (EXPKEY_HASHMAX -1) | |
59 | static struct cache_head *expkey_table[EXPKEY_HASHMAX]; | |
60 | ||
74cae61a | 61 | static void expkey_put(struct kref *ref) |
1da177e4 | 62 | { |
baab935f N |
63 | struct svc_expkey *key = container_of(ref, struct svc_expkey, h.ref); |
64 | ||
65 | if (test_bit(CACHE_VALID, &key->h.flags) && | |
e83aece3 JB |
66 | !test_bit(CACHE_NEGATIVE, &key->h.flags)) |
67 | path_put(&key->ek_path); | |
baab935f N |
68 | auth_domain_put(key->ek_client); |
69 | kfree(key); | |
1da177e4 LT |
70 | } |
71 | ||
72 | static void expkey_request(struct cache_detail *cd, | |
73 | struct cache_head *h, | |
74 | char **bpp, int *blen) | |
75 | { | |
76 | /* client fsidtype \xfsid */ | |
77 | struct svc_expkey *ek = container_of(h, struct svc_expkey, h); | |
78 | char type[5]; | |
79 | ||
80 | qword_add(bpp, blen, ek->ek_client->name); | |
81 | snprintf(type, 5, "%d", ek->ek_fsidtype); | |
82 | qword_add(bpp, blen, type); | |
83 | qword_addhex(bpp, blen, (char*)ek->ek_fsid, key_len(ek->ek_fsidtype)); | |
84 | (*bpp)[-1] = '\n'; | |
85 | } | |
86 | ||
8d270f7f N |
87 | static struct svc_expkey *svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old); |
88 | static struct svc_expkey *svc_expkey_lookup(struct svc_expkey *); | |
74cae61a AB |
89 | static struct cache_detail svc_expkey_cache; |
90 | ||
1da177e4 LT |
91 | static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen) |
92 | { | |
93 | /* client fsidtype fsid [path] */ | |
94 | char *buf; | |
95 | int len; | |
96 | struct auth_domain *dom = NULL; | |
97 | int err; | |
98 | int fsidtype; | |
99 | char *ep; | |
100 | struct svc_expkey key; | |
8d270f7f | 101 | struct svc_expkey *ek; |
1da177e4 LT |
102 | |
103 | if (mesg[mlen-1] != '\n') | |
104 | return -EINVAL; | |
105 | mesg[mlen-1] = 0; | |
106 | ||
107 | buf = kmalloc(PAGE_SIZE, GFP_KERNEL); | |
108 | err = -ENOMEM; | |
109 | if (!buf) goto out; | |
110 | ||
111 | err = -EINVAL; | |
112 | if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0) | |
113 | goto out; | |
114 | ||
115 | err = -ENOENT; | |
116 | dom = auth_domain_find(buf); | |
117 | if (!dom) | |
118 | goto out; | |
119 | dprintk("found domain %s\n", buf); | |
120 | ||
121 | err = -EINVAL; | |
122 | if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0) | |
123 | goto out; | |
124 | fsidtype = simple_strtoul(buf, &ep, 10); | |
125 | if (*ep) | |
126 | goto out; | |
127 | dprintk("found fsidtype %d\n", fsidtype); | |
4bdff8c0 | 128 | if (key_len(fsidtype)==0) /* invalid type */ |
1da177e4 LT |
129 | goto out; |
130 | if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0) | |
131 | goto out; | |
132 | dprintk("found fsid length %d\n", len); | |
133 | if (len != key_len(fsidtype)) | |
134 | goto out; | |
135 | ||
136 | /* OK, we seem to have a valid key */ | |
137 | key.h.flags = 0; | |
138 | key.h.expiry_time = get_expiry(&mesg); | |
139 | if (key.h.expiry_time == 0) | |
140 | goto out; | |
141 | ||
142 | key.ek_client = dom; | |
143 | key.ek_fsidtype = fsidtype; | |
144 | memcpy(key.ek_fsid, buf, len); | |
145 | ||
8d270f7f N |
146 | ek = svc_expkey_lookup(&key); |
147 | err = -ENOMEM; | |
148 | if (!ek) | |
149 | goto out; | |
150 | ||
1da177e4 | 151 | /* now we want a pathname, or empty meaning NEGATIVE */ |
8d270f7f | 152 | err = -EINVAL; |
1da177e4 LT |
153 | if ((len=qword_get(&mesg, buf, PAGE_SIZE)) < 0) |
154 | goto out; | |
155 | dprintk("Path seems to be <%s>\n", buf); | |
156 | err = 0; | |
157 | if (len == 0) { | |
1da177e4 | 158 | set_bit(CACHE_NEGATIVE, &key.h.flags); |
8d270f7f | 159 | ek = svc_expkey_update(&key, ek); |
1da177e4 | 160 | if (ek) |
baab935f | 161 | cache_put(&ek->h, &svc_expkey_cache); |
8d270f7f | 162 | else err = -ENOMEM; |
1da177e4 LT |
163 | } else { |
164 | struct nameidata nd; | |
1da177e4 LT |
165 | err = path_lookup(buf, 0, &nd); |
166 | if (err) | |
167 | goto out; | |
168 | ||
169 | dprintk("Found the path %s\n", buf); | |
e83aece3 JB |
170 | key.ek_path = nd.path; |
171 | ||
8d270f7f | 172 | ek = svc_expkey_update(&key, ek); |
1da177e4 | 173 | if (ek) |
baab935f | 174 | cache_put(&ek->h, &svc_expkey_cache); |
8d270f7f N |
175 | else |
176 | err = -ENOMEM; | |
1d957f9b | 177 | path_put(&nd.path); |
1da177e4 LT |
178 | } |
179 | cache_flush(); | |
180 | out: | |
181 | if (dom) | |
182 | auth_domain_put(dom); | |
f99d49ad | 183 | kfree(buf); |
1da177e4 LT |
184 | return err; |
185 | } | |
186 | ||
187 | static int expkey_show(struct seq_file *m, | |
188 | struct cache_detail *cd, | |
189 | struct cache_head *h) | |
190 | { | |
191 | struct svc_expkey *ek ; | |
af6a4e28 | 192 | int i; |
1da177e4 LT |
193 | |
194 | if (h ==NULL) { | |
195 | seq_puts(m, "#domain fsidtype fsid [path]\n"); | |
196 | return 0; | |
197 | } | |
198 | ek = container_of(h, struct svc_expkey, h); | |
af6a4e28 N |
199 | seq_printf(m, "%s %d 0x", ek->ek_client->name, |
200 | ek->ek_fsidtype); | |
201 | for (i=0; i < key_len(ek->ek_fsidtype)/4; i++) | |
202 | seq_printf(m, "%08x", ek->ek_fsid[i]); | |
1da177e4 LT |
203 | if (test_bit(CACHE_VALID, &h->flags) && |
204 | !test_bit(CACHE_NEGATIVE, &h->flags)) { | |
205 | seq_printf(m, " "); | |
c32c2f63 | 206 | seq_path(m, &ek->ek_path, "\\ \t\n"); |
1da177e4 LT |
207 | } |
208 | seq_printf(m, "\n"); | |
209 | return 0; | |
210 | } | |
1da177e4 | 211 | |
8d270f7f | 212 | static inline int expkey_match (struct cache_head *a, struct cache_head *b) |
1da177e4 | 213 | { |
8d270f7f N |
214 | struct svc_expkey *orig = container_of(a, struct svc_expkey, h); |
215 | struct svc_expkey *new = container_of(b, struct svc_expkey, h); | |
216 | ||
217 | if (orig->ek_fsidtype != new->ek_fsidtype || | |
218 | orig->ek_client != new->ek_client || | |
219 | memcmp(orig->ek_fsid, new->ek_fsid, key_len(orig->ek_fsidtype)) != 0) | |
1da177e4 LT |
220 | return 0; |
221 | return 1; | |
222 | } | |
223 | ||
8d270f7f N |
224 | static inline void expkey_init(struct cache_head *cnew, |
225 | struct cache_head *citem) | |
1da177e4 | 226 | { |
8d270f7f N |
227 | struct svc_expkey *new = container_of(cnew, struct svc_expkey, h); |
228 | struct svc_expkey *item = container_of(citem, struct svc_expkey, h); | |
229 | ||
efc36aa5 | 230 | kref_get(&item->ek_client->ref); |
1da177e4 LT |
231 | new->ek_client = item->ek_client; |
232 | new->ek_fsidtype = item->ek_fsidtype; | |
af6a4e28 N |
233 | |
234 | memcpy(new->ek_fsid, item->ek_fsid, sizeof(new->ek_fsid)); | |
1da177e4 LT |
235 | } |
236 | ||
8d270f7f N |
237 | static inline void expkey_update(struct cache_head *cnew, |
238 | struct cache_head *citem) | |
1da177e4 | 239 | { |
8d270f7f N |
240 | struct svc_expkey *new = container_of(cnew, struct svc_expkey, h); |
241 | struct svc_expkey *item = container_of(citem, struct svc_expkey, h); | |
242 | ||
e83aece3 JB |
243 | new->ek_path = item->ek_path; |
244 | path_get(&item->ek_path); | |
1da177e4 LT |
245 | } |
246 | ||
8d270f7f N |
247 | static struct cache_head *expkey_alloc(void) |
248 | { | |
249 | struct svc_expkey *i = kmalloc(sizeof(*i), GFP_KERNEL); | |
250 | if (i) | |
251 | return &i->h; | |
252 | else | |
253 | return NULL; | |
254 | } | |
255 | ||
74cae61a | 256 | static struct cache_detail svc_expkey_cache = { |
8d270f7f N |
257 | .owner = THIS_MODULE, |
258 | .hash_size = EXPKEY_HASHMAX, | |
259 | .hash_table = expkey_table, | |
260 | .name = "nfsd.fh", | |
261 | .cache_put = expkey_put, | |
262 | .cache_request = expkey_request, | |
263 | .cache_parse = expkey_parse, | |
264 | .cache_show = expkey_show, | |
265 | .match = expkey_match, | |
266 | .init = expkey_init, | |
267 | .update = expkey_update, | |
268 | .alloc = expkey_alloc, | |
269 | }; | |
270 | ||
271 | static struct svc_expkey * | |
272 | svc_expkey_lookup(struct svc_expkey *item) | |
273 | { | |
274 | struct cache_head *ch; | |
275 | int hash = item->ek_fsidtype; | |
276 | char * cp = (char*)item->ek_fsid; | |
277 | int len = key_len(item->ek_fsidtype); | |
278 | ||
279 | hash ^= hash_mem(cp, len, EXPKEY_HASHBITS); | |
280 | hash ^= hash_ptr(item->ek_client, EXPKEY_HASHBITS); | |
281 | hash &= EXPKEY_HASHMASK; | |
282 | ||
283 | ch = sunrpc_cache_lookup(&svc_expkey_cache, &item->h, | |
284 | hash); | |
285 | if (ch) | |
286 | return container_of(ch, struct svc_expkey, h); | |
287 | else | |
288 | return NULL; | |
289 | } | |
290 | ||
291 | static struct svc_expkey * | |
292 | svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old) | |
293 | { | |
294 | struct cache_head *ch; | |
295 | int hash = new->ek_fsidtype; | |
296 | char * cp = (char*)new->ek_fsid; | |
297 | int len = key_len(new->ek_fsidtype); | |
298 | ||
299 | hash ^= hash_mem(cp, len, EXPKEY_HASHBITS); | |
300 | hash ^= hash_ptr(new->ek_client, EXPKEY_HASHBITS); | |
301 | hash &= EXPKEY_HASHMASK; | |
302 | ||
303 | ch = sunrpc_cache_update(&svc_expkey_cache, &new->h, | |
304 | &old->h, hash); | |
305 | if (ch) | |
306 | return container_of(ch, struct svc_expkey, h); | |
307 | else | |
308 | return NULL; | |
309 | } | |
310 | ||
1da177e4 LT |
311 | |
312 | #define EXPORT_HASHBITS 8 | |
313 | #define EXPORT_HASHMAX (1<< EXPORT_HASHBITS) | |
314 | #define EXPORT_HASHMASK (EXPORT_HASHMAX -1) | |
315 | ||
316 | static struct cache_head *export_table[EXPORT_HASHMAX]; | |
317 | ||
93346919 MN |
318 | static void nfsd4_fslocs_free(struct nfsd4_fs_locations *fsloc) |
319 | { | |
320 | int i; | |
321 | ||
322 | for (i = 0; i < fsloc->locations_count; i++) { | |
323 | kfree(fsloc->locations[i].path); | |
324 | kfree(fsloc->locations[i].hosts); | |
325 | } | |
326 | kfree(fsloc->locations); | |
327 | } | |
328 | ||
baab935f | 329 | static void svc_export_put(struct kref *ref) |
1da177e4 | 330 | { |
baab935f | 331 | struct svc_export *exp = container_of(ref, struct svc_export, h.ref); |
54775491 | 332 | path_put(&exp->ex_path); |
baab935f | 333 | auth_domain_put(exp->ex_client); |
54775491 | 334 | kfree(exp->ex_pathname); |
93346919 | 335 | nfsd4_fslocs_free(&exp->ex_fslocs); |
baab935f | 336 | kfree(exp); |
1da177e4 LT |
337 | } |
338 | ||
339 | static void svc_export_request(struct cache_detail *cd, | |
340 | struct cache_head *h, | |
341 | char **bpp, int *blen) | |
342 | { | |
343 | /* client path */ | |
344 | struct svc_export *exp = container_of(h, struct svc_export, h); | |
345 | char *pth; | |
346 | ||
347 | qword_add(bpp, blen, exp->ex_client->name); | |
cf28b486 | 348 | pth = d_path(&exp->ex_path, *bpp, *blen); |
1da177e4 LT |
349 | if (IS_ERR(pth)) { |
350 | /* is this correct? */ | |
351 | (*bpp)[0] = '\n'; | |
352 | return; | |
353 | } | |
354 | qword_add(bpp, blen, pth); | |
355 | (*bpp)[-1] = '\n'; | |
356 | } | |
357 | ||
74cae61a AB |
358 | static struct svc_export *svc_export_update(struct svc_export *new, |
359 | struct svc_export *old); | |
4f7774c3 | 360 | static struct svc_export *svc_export_lookup(struct svc_export *); |
1da177e4 | 361 | |
af6a4e28 | 362 | static int check_export(struct inode *inode, int flags, unsigned char *uuid) |
1da177e4 LT |
363 | { |
364 | ||
365 | /* We currently export only dirs and regular files. | |
366 | * This is what umountd does. | |
367 | */ | |
368 | if (!S_ISDIR(inode->i_mode) && | |
369 | !S_ISREG(inode->i_mode)) | |
370 | return -ENOTDIR; | |
371 | ||
372 | /* There are two requirements on a filesystem to be exportable. | |
373 | * 1: We must be able to identify the filesystem from a number. | |
374 | * either a device number (so FS_REQUIRES_DEV needed) | |
af6a4e28 | 375 | * or an FSID number (so NFSEXP_FSID or ->uuid is needed). |
1da177e4 LT |
376 | * 2: We must be able to find an inode from a filehandle. |
377 | * This means that s_export_op must be set. | |
378 | */ | |
379 | if (!(inode->i_sb->s_type->fs_flags & FS_REQUIRES_DEV) && | |
af6a4e28 N |
380 | !(flags & NFSEXP_FSID) && |
381 | uuid == NULL) { | |
3e3b4800 | 382 | dprintk("exp_export: export of non-dev fs without fsid\n"); |
1da177e4 LT |
383 | return -EINVAL; |
384 | } | |
cfaea787 CH |
385 | |
386 | if (!inode->i_sb->s_export_op || | |
387 | !inode->i_sb->s_export_op->fh_to_dentry) { | |
1da177e4 LT |
388 | dprintk("exp_export: export of invalid fs type.\n"); |
389 | return -EINVAL; | |
390 | } | |
391 | ||
1da177e4 LT |
392 | return 0; |
393 | ||
394 | } | |
395 | ||
93346919 MN |
396 | #ifdef CONFIG_NFSD_V4 |
397 | ||
398 | static int | |
399 | fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc) | |
400 | { | |
401 | int len; | |
402 | int migrated, i, err; | |
403 | ||
93346919 MN |
404 | /* listsize */ |
405 | err = get_int(mesg, &fsloc->locations_count); | |
406 | if (err) | |
407 | return err; | |
408 | if (fsloc->locations_count > MAX_FS_LOCATIONS) | |
409 | return -EINVAL; | |
410 | if (fsloc->locations_count == 0) | |
411 | return 0; | |
412 | ||
413 | fsloc->locations = kzalloc(fsloc->locations_count | |
414 | * sizeof(struct nfsd4_fs_location), GFP_KERNEL); | |
415 | if (!fsloc->locations) | |
416 | return -ENOMEM; | |
417 | for (i=0; i < fsloc->locations_count; i++) { | |
418 | /* colon separated host list */ | |
419 | err = -EINVAL; | |
420 | len = qword_get(mesg, buf, PAGE_SIZE); | |
421 | if (len <= 0) | |
422 | goto out_free_all; | |
423 | err = -ENOMEM; | |
424 | fsloc->locations[i].hosts = kstrdup(buf, GFP_KERNEL); | |
425 | if (!fsloc->locations[i].hosts) | |
426 | goto out_free_all; | |
427 | err = -EINVAL; | |
428 | /* slash separated path component list */ | |
429 | len = qword_get(mesg, buf, PAGE_SIZE); | |
430 | if (len <= 0) | |
431 | goto out_free_all; | |
432 | err = -ENOMEM; | |
433 | fsloc->locations[i].path = kstrdup(buf, GFP_KERNEL); | |
434 | if (!fsloc->locations[i].path) | |
435 | goto out_free_all; | |
436 | } | |
437 | /* migrated */ | |
438 | err = get_int(mesg, &migrated); | |
439 | if (err) | |
440 | goto out_free_all; | |
441 | err = -EINVAL; | |
442 | if (migrated < 0 || migrated > 1) | |
443 | goto out_free_all; | |
444 | fsloc->migrated = migrated; | |
445 | return 0; | |
446 | out_free_all: | |
447 | nfsd4_fslocs_free(fsloc); | |
448 | return err; | |
449 | } | |
450 | ||
e677bfe4 AA |
451 | static int secinfo_parse(char **mesg, char *buf, struct svc_export *exp) |
452 | { | |
453 | int listsize, err; | |
454 | struct exp_flavor_info *f; | |
455 | ||
456 | err = get_int(mesg, &listsize); | |
457 | if (err) | |
458 | return err; | |
459 | if (listsize < 0 || listsize > MAX_SECINFO_LIST) | |
460 | return -EINVAL; | |
461 | ||
462 | for (f = exp->ex_flavors; f < exp->ex_flavors + listsize; f++) { | |
463 | err = get_int(mesg, &f->pseudoflavor); | |
464 | if (err) | |
465 | return err; | |
466 | /* | |
467 | * Just a quick sanity check; we could also try to check | |
468 | * whether this pseudoflavor is supported, but at worst | |
469 | * an unsupported pseudoflavor on the export would just | |
470 | * be a pseudoflavor that won't match the flavor of any | |
471 | * authenticated request. The administrator will | |
472 | * probably discover the problem when someone fails to | |
473 | * authenticate. | |
474 | */ | |
475 | if (f->pseudoflavor < 0) | |
476 | return -EINVAL; | |
477 | err = get_int(mesg, &f->flags); | |
478 | if (err) | |
479 | return err; | |
480 | /* Only some flags are allowed to differ between flavors: */ | |
481 | if (~NFSEXP_SECINFO_FLAGS & (f->flags ^ exp->ex_flags)) | |
482 | return -EINVAL; | |
483 | } | |
484 | exp->ex_nflavors = listsize; | |
485 | return 0; | |
486 | } | |
487 | ||
93346919 | 488 | #else /* CONFIG_NFSD_V4 */ |
e677bfe4 AA |
489 | static inline int |
490 | fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc){return 0;} | |
491 | static inline int | |
492 | secinfo_parse(char **mesg, char *buf, struct svc_export *exp) { return 0; } | |
93346919 MN |
493 | #endif |
494 | ||
1da177e4 LT |
495 | static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen) |
496 | { | |
497 | /* client path expiry [flags anonuid anongid fsid] */ | |
498 | char *buf; | |
499 | int len; | |
500 | int err; | |
501 | struct auth_domain *dom = NULL; | |
502 | struct nameidata nd; | |
503 | struct svc_export exp, *expp; | |
504 | int an_int; | |
505 | ||
4ac91378 | 506 | nd.path.dentry = NULL; |
54775491 | 507 | exp.ex_pathname = NULL; |
1da177e4 | 508 | |
402acd29 N |
509 | /* fs locations */ |
510 | exp.ex_fslocs.locations = NULL; | |
511 | exp.ex_fslocs.locations_count = 0; | |
512 | exp.ex_fslocs.migrated = 0; | |
513 | ||
514 | exp.ex_uuid = NULL; | |
515 | ||
e677bfe4 AA |
516 | /* secinfo */ |
517 | exp.ex_nflavors = 0; | |
518 | ||
1da177e4 LT |
519 | if (mesg[mlen-1] != '\n') |
520 | return -EINVAL; | |
521 | mesg[mlen-1] = 0; | |
522 | ||
523 | buf = kmalloc(PAGE_SIZE, GFP_KERNEL); | |
524 | err = -ENOMEM; | |
525 | if (!buf) goto out; | |
526 | ||
527 | /* client */ | |
528 | len = qword_get(&mesg, buf, PAGE_SIZE); | |
529 | err = -EINVAL; | |
530 | if (len <= 0) goto out; | |
531 | ||
532 | err = -ENOENT; | |
533 | dom = auth_domain_find(buf); | |
534 | if (!dom) | |
535 | goto out; | |
536 | ||
537 | /* path */ | |
538 | err = -EINVAL; | |
539 | if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0) | |
540 | goto out; | |
541 | err = path_lookup(buf, 0, &nd); | |
cd156549 | 542 | if (err) goto out_no_path; |
1da177e4 LT |
543 | |
544 | exp.h.flags = 0; | |
545 | exp.ex_client = dom; | |
54775491 JB |
546 | exp.ex_path.mnt = nd.path.mnt; |
547 | exp.ex_path.dentry = nd.path.dentry; | |
548 | exp.ex_pathname = kstrdup(buf, GFP_KERNEL); | |
b009a873 | 549 | err = -ENOMEM; |
54775491 | 550 | if (!exp.ex_pathname) |
b009a873 | 551 | goto out; |
1da177e4 LT |
552 | |
553 | /* expiry */ | |
554 | err = -EINVAL; | |
555 | exp.h.expiry_time = get_expiry(&mesg); | |
556 | if (exp.h.expiry_time == 0) | |
557 | goto out; | |
558 | ||
559 | /* flags */ | |
560 | err = get_int(&mesg, &an_int); | |
4a4b8831 BF |
561 | if (err == -ENOENT) { |
562 | err = 0; | |
1da177e4 | 563 | set_bit(CACHE_NEGATIVE, &exp.h.flags); |
4a4b8831 | 564 | } else { |
1da177e4 LT |
565 | if (err || an_int < 0) goto out; |
566 | exp.ex_flags= an_int; | |
567 | ||
568 | /* anon uid */ | |
569 | err = get_int(&mesg, &an_int); | |
570 | if (err) goto out; | |
571 | exp.ex_anon_uid= an_int; | |
572 | ||
573 | /* anon gid */ | |
574 | err = get_int(&mesg, &an_int); | |
575 | if (err) goto out; | |
576 | exp.ex_anon_gid= an_int; | |
577 | ||
578 | /* fsid */ | |
579 | err = get_int(&mesg, &an_int); | |
580 | if (err) goto out; | |
581 | exp.ex_fsid = an_int; | |
582 | ||
af6a4e28 N |
583 | while ((len = qword_get(&mesg, buf, PAGE_SIZE)) > 0) { |
584 | if (strcmp(buf, "fsloc") == 0) | |
585 | err = fsloc_parse(&mesg, buf, &exp.ex_fslocs); | |
586 | else if (strcmp(buf, "uuid") == 0) { | |
587 | /* expect a 16 byte uuid encoded as \xXXXX... */ | |
588 | len = qword_get(&mesg, buf, PAGE_SIZE); | |
589 | if (len != 16) | |
590 | err = -EINVAL; | |
591 | else { | |
592 | exp.ex_uuid = | |
593 | kmemdup(buf, 16, GFP_KERNEL); | |
594 | if (exp.ex_uuid == NULL) | |
595 | err = -ENOMEM; | |
596 | } | |
e677bfe4 AA |
597 | } else if (strcmp(buf, "secinfo") == 0) |
598 | err = secinfo_parse(&mesg, buf, &exp); | |
599 | else | |
af6a4e28 N |
600 | /* quietly ignore unknown words and anything |
601 | * following. Newer user-space can try to set | |
602 | * new values, then see what the result was. | |
603 | */ | |
604 | break; | |
605 | if (err) | |
606 | goto out; | |
607 | } | |
93346919 | 608 | |
4ac91378 | 609 | err = check_export(nd.path.dentry->d_inode, exp.ex_flags, |
af6a4e28 N |
610 | exp.ex_uuid); |
611 | if (err) goto out; | |
1da177e4 LT |
612 | } |
613 | ||
4f7774c3 | 614 | expp = svc_export_lookup(&exp); |
1da177e4 | 615 | if (expp) |
4f7774c3 N |
616 | expp = svc_export_update(&exp, expp); |
617 | else | |
618 | err = -ENOMEM; | |
1da177e4 | 619 | cache_flush(); |
4f7774c3 N |
620 | if (expp == NULL) |
621 | err = -ENOMEM; | |
622 | else | |
623 | exp_put(expp); | |
1da177e4 | 624 | out: |
af6a4e28 N |
625 | nfsd4_fslocs_free(&exp.ex_fslocs); |
626 | kfree(exp.ex_uuid); | |
54775491 | 627 | kfree(exp.ex_pathname); |
4ac91378 | 628 | if (nd.path.dentry) |
1d957f9b | 629 | path_put(&nd.path); |
cd156549 | 630 | out_no_path: |
1da177e4 LT |
631 | if (dom) |
632 | auth_domain_put(dom); | |
f99d49ad | 633 | kfree(buf); |
1da177e4 LT |
634 | return err; |
635 | } | |
636 | ||
93346919 MN |
637 | static void exp_flags(struct seq_file *m, int flag, int fsid, |
638 | uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fslocs); | |
91fe39d3 | 639 | static void show_secinfo(struct seq_file *m, struct svc_export *exp); |
1da177e4 LT |
640 | |
641 | static int svc_export_show(struct seq_file *m, | |
642 | struct cache_detail *cd, | |
643 | struct cache_head *h) | |
644 | { | |
645 | struct svc_export *exp ; | |
646 | ||
647 | if (h ==NULL) { | |
648 | seq_puts(m, "#path domain(flags)\n"); | |
649 | return 0; | |
650 | } | |
651 | exp = container_of(h, struct svc_export, h); | |
c32c2f63 | 652 | seq_path(m, &exp->ex_path, " \t\n\\"); |
1da177e4 LT |
653 | seq_putc(m, '\t'); |
654 | seq_escape(m, exp->ex_client->name, " \t\n\\"); | |
655 | seq_putc(m, '('); | |
656 | if (test_bit(CACHE_VALID, &h->flags) && | |
af6a4e28 | 657 | !test_bit(CACHE_NEGATIVE, &h->flags)) { |
93346919 MN |
658 | exp_flags(m, exp->ex_flags, exp->ex_fsid, |
659 | exp->ex_anon_uid, exp->ex_anon_gid, &exp->ex_fslocs); | |
af6a4e28 N |
660 | if (exp->ex_uuid) { |
661 | int i; | |
662 | seq_puts(m, ",uuid="); | |
663 | for (i=0; i<16; i++) { | |
664 | if ((i&3) == 0 && i) | |
665 | seq_putc(m, ':'); | |
666 | seq_printf(m, "%02x", exp->ex_uuid[i]); | |
667 | } | |
668 | } | |
91fe39d3 | 669 | show_secinfo(m, exp); |
af6a4e28 | 670 | } |
1da177e4 LT |
671 | seq_puts(m, ")\n"); |
672 | return 0; | |
673 | } | |
4f7774c3 | 674 | static int svc_export_match(struct cache_head *a, struct cache_head *b) |
1da177e4 | 675 | { |
4f7774c3 N |
676 | struct svc_export *orig = container_of(a, struct svc_export, h); |
677 | struct svc_export *new = container_of(b, struct svc_export, h); | |
678 | return orig->ex_client == new->ex_client && | |
54775491 JB |
679 | orig->ex_path.dentry == new->ex_path.dentry && |
680 | orig->ex_path.mnt == new->ex_path.mnt; | |
1da177e4 | 681 | } |
4f7774c3 N |
682 | |
683 | static void svc_export_init(struct cache_head *cnew, struct cache_head *citem) | |
1da177e4 | 684 | { |
4f7774c3 N |
685 | struct svc_export *new = container_of(cnew, struct svc_export, h); |
686 | struct svc_export *item = container_of(citem, struct svc_export, h); | |
687 | ||
efc36aa5 | 688 | kref_get(&item->ex_client->ref); |
1da177e4 | 689 | new->ex_client = item->ex_client; |
54775491 JB |
690 | new->ex_path.dentry = dget(item->ex_path.dentry); |
691 | new->ex_path.mnt = mntget(item->ex_path.mnt); | |
692 | new->ex_pathname = NULL; | |
93346919 MN |
693 | new->ex_fslocs.locations = NULL; |
694 | new->ex_fslocs.locations_count = 0; | |
695 | new->ex_fslocs.migrated = 0; | |
1da177e4 LT |
696 | } |
697 | ||
4f7774c3 | 698 | static void export_update(struct cache_head *cnew, struct cache_head *citem) |
1da177e4 | 699 | { |
4f7774c3 N |
700 | struct svc_export *new = container_of(cnew, struct svc_export, h); |
701 | struct svc_export *item = container_of(citem, struct svc_export, h); | |
e677bfe4 | 702 | int i; |
4f7774c3 | 703 | |
1da177e4 LT |
704 | new->ex_flags = item->ex_flags; |
705 | new->ex_anon_uid = item->ex_anon_uid; | |
706 | new->ex_anon_gid = item->ex_anon_gid; | |
707 | new->ex_fsid = item->ex_fsid; | |
af6a4e28 N |
708 | new->ex_uuid = item->ex_uuid; |
709 | item->ex_uuid = NULL; | |
54775491 JB |
710 | new->ex_pathname = item->ex_pathname; |
711 | item->ex_pathname = NULL; | |
93346919 MN |
712 | new->ex_fslocs.locations = item->ex_fslocs.locations; |
713 | item->ex_fslocs.locations = NULL; | |
714 | new->ex_fslocs.locations_count = item->ex_fslocs.locations_count; | |
715 | item->ex_fslocs.locations_count = 0; | |
716 | new->ex_fslocs.migrated = item->ex_fslocs.migrated; | |
717 | item->ex_fslocs.migrated = 0; | |
e677bfe4 AA |
718 | new->ex_nflavors = item->ex_nflavors; |
719 | for (i = 0; i < MAX_SECINFO_LIST; i++) { | |
720 | new->ex_flavors[i] = item->ex_flavors[i]; | |
721 | } | |
1da177e4 LT |
722 | } |
723 | ||
4f7774c3 N |
724 | static struct cache_head *svc_export_alloc(void) |
725 | { | |
726 | struct svc_export *i = kmalloc(sizeof(*i), GFP_KERNEL); | |
727 | if (i) | |
728 | return &i->h; | |
729 | else | |
730 | return NULL; | |
731 | } | |
732 | ||
733 | struct cache_detail svc_export_cache = { | |
734 | .owner = THIS_MODULE, | |
735 | .hash_size = EXPORT_HASHMAX, | |
736 | .hash_table = export_table, | |
737 | .name = "nfsd.export", | |
738 | .cache_put = svc_export_put, | |
739 | .cache_request = svc_export_request, | |
740 | .cache_parse = svc_export_parse, | |
741 | .cache_show = svc_export_show, | |
742 | .match = svc_export_match, | |
743 | .init = svc_export_init, | |
744 | .update = export_update, | |
745 | .alloc = svc_export_alloc, | |
746 | }; | |
747 | ||
748 | static struct svc_export * | |
749 | svc_export_lookup(struct svc_export *exp) | |
750 | { | |
751 | struct cache_head *ch; | |
752 | int hash; | |
753 | hash = hash_ptr(exp->ex_client, EXPORT_HASHBITS); | |
54775491 JB |
754 | hash ^= hash_ptr(exp->ex_path.dentry, EXPORT_HASHBITS); |
755 | hash ^= hash_ptr(exp->ex_path.mnt, EXPORT_HASHBITS); | |
4f7774c3 N |
756 | |
757 | ch = sunrpc_cache_lookup(&svc_export_cache, &exp->h, | |
758 | hash); | |
759 | if (ch) | |
760 | return container_of(ch, struct svc_export, h); | |
761 | else | |
762 | return NULL; | |
763 | } | |
764 | ||
74cae61a | 765 | static struct svc_export * |
4f7774c3 N |
766 | svc_export_update(struct svc_export *new, struct svc_export *old) |
767 | { | |
768 | struct cache_head *ch; | |
769 | int hash; | |
770 | hash = hash_ptr(old->ex_client, EXPORT_HASHBITS); | |
54775491 JB |
771 | hash ^= hash_ptr(old->ex_path.dentry, EXPORT_HASHBITS); |
772 | hash ^= hash_ptr(old->ex_path.mnt, EXPORT_HASHBITS); | |
4f7774c3 N |
773 | |
774 | ch = sunrpc_cache_update(&svc_export_cache, &new->h, | |
775 | &old->h, | |
776 | hash); | |
777 | if (ch) | |
778 | return container_of(ch, struct svc_export, h); | |
779 | else | |
780 | return NULL; | |
781 | } | |
1da177e4 LT |
782 | |
783 | ||
74cae61a | 784 | static struct svc_expkey * |
1da177e4 LT |
785 | exp_find_key(svc_client *clp, int fsid_type, u32 *fsidv, struct cache_req *reqp) |
786 | { | |
787 | struct svc_expkey key, *ek; | |
788 | int err; | |
789 | ||
790 | if (!clp) | |
2d3bb252 | 791 | return ERR_PTR(-ENOENT); |
1da177e4 LT |
792 | |
793 | key.ek_client = clp; | |
794 | key.ek_fsidtype = fsid_type; | |
795 | memcpy(key.ek_fsid, fsidv, key_len(fsid_type)); | |
796 | ||
8d270f7f | 797 | ek = svc_expkey_lookup(&key); |
2d3bb252 BF |
798 | if (ek == NULL) |
799 | return ERR_PTR(-ENOMEM); | |
800 | err = cache_check(&svc_expkey_cache, &ek->h, reqp); | |
801 | if (err) | |
802 | return ERR_PTR(err); | |
1da177e4 LT |
803 | return ek; |
804 | } | |
805 | ||
806 | static int exp_set_key(svc_client *clp, int fsid_type, u32 *fsidv, | |
807 | struct svc_export *exp) | |
808 | { | |
809 | struct svc_expkey key, *ek; | |
810 | ||
811 | key.ek_client = clp; | |
812 | key.ek_fsidtype = fsid_type; | |
813 | memcpy(key.ek_fsid, fsidv, key_len(fsid_type)); | |
e83aece3 | 814 | key.ek_path = exp->ex_path; |
1da177e4 LT |
815 | key.h.expiry_time = NEVER; |
816 | key.h.flags = 0; | |
817 | ||
8d270f7f N |
818 | ek = svc_expkey_lookup(&key); |
819 | if (ek) | |
820 | ek = svc_expkey_update(&key,ek); | |
1da177e4 | 821 | if (ek) { |
baab935f | 822 | cache_put(&ek->h, &svc_expkey_cache); |
1da177e4 LT |
823 | return 0; |
824 | } | |
825 | return -ENOMEM; | |
826 | } | |
827 | ||
828 | /* | |
829 | * Find the client's export entry matching xdev/xino. | |
830 | */ | |
831 | static inline struct svc_expkey * | |
832 | exp_get_key(svc_client *clp, dev_t dev, ino_t ino) | |
833 | { | |
834 | u32 fsidv[3]; | |
835 | ||
836 | if (old_valid_dev(dev)) { | |
af6a4e28 N |
837 | mk_fsid(FSID_DEV, fsidv, dev, ino, 0, NULL); |
838 | return exp_find_key(clp, FSID_DEV, fsidv, NULL); | |
1da177e4 | 839 | } |
af6a4e28 N |
840 | mk_fsid(FSID_ENCODE_DEV, fsidv, dev, ino, 0, NULL); |
841 | return exp_find_key(clp, FSID_ENCODE_DEV, fsidv, NULL); | |
1da177e4 LT |
842 | } |
843 | ||
844 | /* | |
845 | * Find the client's export entry matching fsid | |
846 | */ | |
847 | static inline struct svc_expkey * | |
848 | exp_get_fsid_key(svc_client *clp, int fsid) | |
849 | { | |
850 | u32 fsidv[2]; | |
851 | ||
af6a4e28 | 852 | mk_fsid(FSID_NUM, fsidv, 0, 0, fsid, NULL); |
1da177e4 | 853 | |
af6a4e28 | 854 | return exp_find_key(clp, FSID_NUM, fsidv, NULL); |
1da177e4 LT |
855 | } |
856 | ||
cce76f9b AB |
857 | static svc_export *exp_get_by_name(svc_client *clp, struct vfsmount *mnt, |
858 | struct dentry *dentry, | |
859 | struct cache_req *reqp) | |
1da177e4 LT |
860 | { |
861 | struct svc_export *exp, key; | |
2d3bb252 | 862 | int err; |
e83aece3 | 863 | |
1da177e4 | 864 | if (!clp) |
2d3bb252 | 865 | return ERR_PTR(-ENOENT); |
1da177e4 LT |
866 | |
867 | key.ex_client = clp; | |
54775491 JB |
868 | key.ex_path.mnt = mnt; |
869 | key.ex_path.dentry = dentry; | |
1da177e4 | 870 | |
4f7774c3 | 871 | exp = svc_export_lookup(&key); |
2d3bb252 BF |
872 | if (exp == NULL) |
873 | return ERR_PTR(-ENOMEM); | |
874 | err = cache_check(&svc_export_cache, &exp->h, reqp); | |
875 | if (err) | |
876 | return ERR_PTR(err); | |
1da177e4 LT |
877 | return exp; |
878 | } | |
879 | ||
880 | /* | |
881 | * Find the export entry for a given dentry. | |
882 | */ | |
cce76f9b AB |
883 | static struct svc_export *exp_parent(svc_client *clp, struct vfsmount *mnt, |
884 | struct dentry *dentry, | |
885 | struct cache_req *reqp) | |
1da177e4 LT |
886 | { |
887 | svc_export *exp; | |
888 | ||
889 | dget(dentry); | |
890 | exp = exp_get_by_name(clp, mnt, dentry, reqp); | |
891 | ||
2d3bb252 | 892 | while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(dentry)) { |
1da177e4 LT |
893 | struct dentry *parent; |
894 | ||
895 | parent = dget_parent(dentry); | |
896 | dput(dentry); | |
897 | dentry = parent; | |
898 | exp = exp_get_by_name(clp, mnt, dentry, reqp); | |
899 | } | |
900 | dput(dentry); | |
901 | return exp; | |
902 | } | |
903 | ||
904 | /* | |
905 | * Hashtable locking. Write locks are placed only by user processes | |
906 | * wanting to modify export information. | |
907 | * Write locking only done in this file. Read locking | |
908 | * needed externally. | |
909 | */ | |
910 | ||
911 | static DECLARE_RWSEM(hash_sem); | |
912 | ||
913 | void | |
914 | exp_readlock(void) | |
915 | { | |
916 | down_read(&hash_sem); | |
917 | } | |
918 | ||
919 | static inline void | |
920 | exp_writelock(void) | |
921 | { | |
922 | down_write(&hash_sem); | |
923 | } | |
924 | ||
925 | void | |
926 | exp_readunlock(void) | |
927 | { | |
928 | up_read(&hash_sem); | |
929 | } | |
930 | ||
931 | static inline void | |
932 | exp_writeunlock(void) | |
933 | { | |
934 | up_write(&hash_sem); | |
935 | } | |
936 | ||
937 | static void exp_fsid_unhash(struct svc_export *exp) | |
938 | { | |
939 | struct svc_expkey *ek; | |
940 | ||
941 | if ((exp->ex_flags & NFSEXP_FSID) == 0) | |
942 | return; | |
943 | ||
944 | ek = exp_get_fsid_key(exp->ex_client, exp->ex_fsid); | |
2d3bb252 | 945 | if (!IS_ERR(ek)) { |
1da177e4 | 946 | ek->h.expiry_time = get_seconds()-1; |
baab935f | 947 | cache_put(&ek->h, &svc_expkey_cache); |
1da177e4 LT |
948 | } |
949 | svc_expkey_cache.nextcheck = get_seconds(); | |
950 | } | |
951 | ||
952 | static int exp_fsid_hash(svc_client *clp, struct svc_export *exp) | |
953 | { | |
954 | u32 fsid[2]; | |
955 | ||
956 | if ((exp->ex_flags & NFSEXP_FSID) == 0) | |
957 | return 0; | |
958 | ||
af6a4e28 N |
959 | mk_fsid(FSID_NUM, fsid, 0, 0, exp->ex_fsid, NULL); |
960 | return exp_set_key(clp, FSID_NUM, fsid, exp); | |
1da177e4 LT |
961 | } |
962 | ||
963 | static int exp_hash(struct auth_domain *clp, struct svc_export *exp) | |
964 | { | |
965 | u32 fsid[2]; | |
54775491 | 966 | struct inode *inode = exp->ex_path.dentry->d_inode; |
1da177e4 LT |
967 | dev_t dev = inode->i_sb->s_dev; |
968 | ||
969 | if (old_valid_dev(dev)) { | |
af6a4e28 N |
970 | mk_fsid(FSID_DEV, fsid, dev, inode->i_ino, 0, NULL); |
971 | return exp_set_key(clp, FSID_DEV, fsid, exp); | |
1da177e4 | 972 | } |
af6a4e28 N |
973 | mk_fsid(FSID_ENCODE_DEV, fsid, dev, inode->i_ino, 0, NULL); |
974 | return exp_set_key(clp, FSID_ENCODE_DEV, fsid, exp); | |
1da177e4 LT |
975 | } |
976 | ||
977 | static void exp_unhash(struct svc_export *exp) | |
978 | { | |
979 | struct svc_expkey *ek; | |
54775491 | 980 | struct inode *inode = exp->ex_path.dentry->d_inode; |
1da177e4 LT |
981 | |
982 | ek = exp_get_key(exp->ex_client, inode->i_sb->s_dev, inode->i_ino); | |
2d3bb252 | 983 | if (!IS_ERR(ek)) { |
1da177e4 | 984 | ek->h.expiry_time = get_seconds()-1; |
baab935f | 985 | cache_put(&ek->h, &svc_expkey_cache); |
1da177e4 LT |
986 | } |
987 | svc_expkey_cache.nextcheck = get_seconds(); | |
988 | } | |
989 | ||
990 | /* | |
991 | * Export a file system. | |
992 | */ | |
993 | int | |
994 | exp_export(struct nfsctl_export *nxp) | |
995 | { | |
996 | svc_client *clp; | |
997 | struct svc_export *exp = NULL; | |
998 | struct svc_export new; | |
999 | struct svc_expkey *fsid_key = NULL; | |
1000 | struct nameidata nd; | |
1001 | int err; | |
1002 | ||
1003 | /* Consistency check */ | |
1004 | err = -EINVAL; | |
1005 | if (!exp_verify_string(nxp->ex_path, NFS_MAXPATHLEN) || | |
1006 | !exp_verify_string(nxp->ex_client, NFSCLNT_IDMAX)) | |
1007 | goto out; | |
1008 | ||
1009 | dprintk("exp_export called for %s:%s (%x/%ld fl %x).\n", | |
1010 | nxp->ex_client, nxp->ex_path, | |
1011 | (unsigned)nxp->ex_dev, (long)nxp->ex_ino, | |
1012 | nxp->ex_flags); | |
1013 | ||
1014 | /* Try to lock the export table for update */ | |
1015 | exp_writelock(); | |
1016 | ||
1017 | /* Look up client info */ | |
1018 | if (!(clp = auth_domain_find(nxp->ex_client))) | |
1019 | goto out_unlock; | |
1020 | ||
1021 | ||
1022 | /* Look up the dentry */ | |
1023 | err = path_lookup(nxp->ex_path, 0, &nd); | |
1024 | if (err) | |
1025 | goto out_unlock; | |
1026 | err = -EINVAL; | |
1027 | ||
4ac91378 | 1028 | exp = exp_get_by_name(clp, nd.path.mnt, nd.path.dentry, NULL); |
1da177e4 | 1029 | |
f988443a N |
1030 | memset(&new, 0, sizeof(new)); |
1031 | ||
1da177e4 LT |
1032 | /* must make sure there won't be an ex_fsid clash */ |
1033 | if ((nxp->ex_flags & NFSEXP_FSID) && | |
2d3bb252 | 1034 | (!IS_ERR(fsid_key = exp_get_fsid_key(clp, nxp->ex_dev))) && |
e83aece3 JB |
1035 | fsid_key->ek_path.mnt && |
1036 | (fsid_key->ek_path.mnt != nd.path.mnt || | |
1037 | fsid_key->ek_path.dentry != nd.path.dentry)) | |
1da177e4 LT |
1038 | goto finish; |
1039 | ||
2d3bb252 | 1040 | if (!IS_ERR(exp)) { |
1da177e4 LT |
1041 | /* just a flags/id/fsid update */ |
1042 | ||
1043 | exp_fsid_unhash(exp); | |
1044 | exp->ex_flags = nxp->ex_flags; | |
1045 | exp->ex_anon_uid = nxp->ex_anon_uid; | |
1046 | exp->ex_anon_gid = nxp->ex_anon_gid; | |
1047 | exp->ex_fsid = nxp->ex_dev; | |
1048 | ||
1049 | err = exp_fsid_hash(clp, exp); | |
1050 | goto finish; | |
1051 | } | |
1052 | ||
4ac91378 | 1053 | err = check_export(nd.path.dentry->d_inode, nxp->ex_flags, NULL); |
1da177e4 LT |
1054 | if (err) goto finish; |
1055 | ||
1056 | err = -ENOMEM; | |
1057 | ||
1058 | dprintk("nfsd: creating export entry %p for client %p\n", exp, clp); | |
1059 | ||
1060 | new.h.expiry_time = NEVER; | |
1061 | new.h.flags = 0; | |
54775491 JB |
1062 | new.ex_pathname = kstrdup(nxp->ex_path, GFP_KERNEL); |
1063 | if (!new.ex_pathname) | |
f988443a | 1064 | goto finish; |
1da177e4 | 1065 | new.ex_client = clp; |
54775491 | 1066 | new.ex_path = nd.path; |
1da177e4 LT |
1067 | new.ex_flags = nxp->ex_flags; |
1068 | new.ex_anon_uid = nxp->ex_anon_uid; | |
1069 | new.ex_anon_gid = nxp->ex_anon_gid; | |
1070 | new.ex_fsid = nxp->ex_dev; | |
1071 | ||
4f7774c3 N |
1072 | exp = svc_export_lookup(&new); |
1073 | if (exp) | |
1074 | exp = svc_export_update(&new, exp); | |
1da177e4 | 1075 | |
4f7774c3 | 1076 | if (!exp) |
1da177e4 LT |
1077 | goto finish; |
1078 | ||
1da177e4 LT |
1079 | if (exp_hash(clp, exp) || |
1080 | exp_fsid_hash(clp, exp)) { | |
1081 | /* failed to create at least one index */ | |
1082 | exp_do_unexport(exp); | |
1083 | cache_flush(); | |
f988443a N |
1084 | } else |
1085 | err = 0; | |
1da177e4 | 1086 | finish: |
54775491 | 1087 | kfree(new.ex_pathname); |
1da177e4 LT |
1088 | if (exp) |
1089 | exp_put(exp); | |
1090 | if (fsid_key && !IS_ERR(fsid_key)) | |
baab935f | 1091 | cache_put(&fsid_key->h, &svc_expkey_cache); |
1da177e4 LT |
1092 | if (clp) |
1093 | auth_domain_put(clp); | |
1d957f9b | 1094 | path_put(&nd.path); |
1da177e4 LT |
1095 | out_unlock: |
1096 | exp_writeunlock(); | |
1097 | out: | |
1098 | return err; | |
1099 | } | |
1100 | ||
1101 | /* | |
1102 | * Unexport a file system. The export entry has already | |
1103 | * been removed from the client's list of exported fs's. | |
1104 | */ | |
1105 | static void | |
1106 | exp_do_unexport(svc_export *unexp) | |
1107 | { | |
1108 | unexp->h.expiry_time = get_seconds()-1; | |
1109 | svc_export_cache.nextcheck = get_seconds(); | |
1110 | exp_unhash(unexp); | |
1111 | exp_fsid_unhash(unexp); | |
1112 | } | |
1113 | ||
1114 | ||
1115 | /* | |
1116 | * unexport syscall. | |
1117 | */ | |
1118 | int | |
1119 | exp_unexport(struct nfsctl_export *nxp) | |
1120 | { | |
1121 | struct auth_domain *dom; | |
1122 | svc_export *exp; | |
1123 | struct nameidata nd; | |
1124 | int err; | |
1125 | ||
1126 | /* Consistency check */ | |
1127 | if (!exp_verify_string(nxp->ex_path, NFS_MAXPATHLEN) || | |
1128 | !exp_verify_string(nxp->ex_client, NFSCLNT_IDMAX)) | |
1129 | return -EINVAL; | |
1130 | ||
1131 | exp_writelock(); | |
1132 | ||
1133 | err = -EINVAL; | |
1134 | dom = auth_domain_find(nxp->ex_client); | |
1135 | if (!dom) { | |
1136 | dprintk("nfsd: unexport couldn't find %s\n", nxp->ex_client); | |
1137 | goto out_unlock; | |
1138 | } | |
1139 | ||
1140 | err = path_lookup(nxp->ex_path, 0, &nd); | |
1141 | if (err) | |
1142 | goto out_domain; | |
1143 | ||
1144 | err = -EINVAL; | |
4ac91378 | 1145 | exp = exp_get_by_name(dom, nd.path.mnt, nd.path.dentry, NULL); |
1d957f9b | 1146 | path_put(&nd.path); |
2d3bb252 | 1147 | if (IS_ERR(exp)) |
1da177e4 LT |
1148 | goto out_domain; |
1149 | ||
1150 | exp_do_unexport(exp); | |
1151 | exp_put(exp); | |
1152 | err = 0; | |
1153 | ||
1154 | out_domain: | |
1155 | auth_domain_put(dom); | |
1156 | cache_flush(); | |
1157 | out_unlock: | |
1158 | exp_writeunlock(); | |
1159 | return err; | |
1160 | } | |
1161 | ||
1162 | /* | |
1163 | * Obtain the root fh on behalf of a client. | |
1164 | * This could be done in user space, but I feel that it adds some safety | |
1165 | * since its harder to fool a kernel module than a user space program. | |
1166 | */ | |
1167 | int | |
1168 | exp_rootfh(svc_client *clp, char *path, struct knfsd_fh *f, int maxsize) | |
1169 | { | |
1170 | struct svc_export *exp; | |
1171 | struct nameidata nd; | |
1172 | struct inode *inode; | |
1173 | struct svc_fh fh; | |
1174 | int err; | |
1175 | ||
1176 | err = -EPERM; | |
1177 | /* NB: we probably ought to check that it's NUL-terminated */ | |
1178 | if (path_lookup(path, 0, &nd)) { | |
1179 | printk("nfsd: exp_rootfh path not found %s", path); | |
1180 | return err; | |
1181 | } | |
4ac91378 | 1182 | inode = nd.path.dentry->d_inode; |
1da177e4 LT |
1183 | |
1184 | dprintk("nfsd: exp_rootfh(%s [%p] %s:%s/%ld)\n", | |
4ac91378 | 1185 | path, nd.path.dentry, clp->name, |
1da177e4 | 1186 | inode->i_sb->s_id, inode->i_ino); |
4ac91378 | 1187 | exp = exp_parent(clp, nd.path.mnt, nd.path.dentry, NULL); |
4b41bd85 BF |
1188 | if (IS_ERR(exp)) { |
1189 | err = PTR_ERR(exp); | |
1190 | goto out; | |
1191 | } | |
1da177e4 LT |
1192 | |
1193 | /* | |
1194 | * fh must be initialized before calling fh_compose | |
1195 | */ | |
1196 | fh_init(&fh, maxsize); | |
4ac91378 | 1197 | if (fh_compose(&fh, exp, nd.path.dentry, NULL)) |
1da177e4 LT |
1198 | err = -EINVAL; |
1199 | else | |
1200 | err = 0; | |
1201 | memcpy(f, &fh.fh_handle, sizeof(struct knfsd_fh)); | |
1202 | fh_put(&fh); | |
1203 | exp_put(exp); | |
1204 | out: | |
1d957f9b | 1205 | path_put(&nd.path); |
1da177e4 LT |
1206 | return err; |
1207 | } | |
1208 | ||
cce76f9b AB |
1209 | static struct svc_export *exp_find(struct auth_domain *clp, int fsid_type, |
1210 | u32 *fsidv, struct cache_req *reqp) | |
eab7e2e6 N |
1211 | { |
1212 | struct svc_export *exp; | |
1213 | struct svc_expkey *ek = exp_find_key(clp, fsid_type, fsidv, reqp); | |
2d3bb252 | 1214 | if (IS_ERR(ek)) |
e231c2ee | 1215 | return ERR_CAST(ek); |
eab7e2e6 | 1216 | |
e83aece3 | 1217 | exp = exp_get_by_name(clp, ek->ek_path.mnt, ek->ek_path.dentry, reqp); |
baab935f | 1218 | cache_put(&ek->h, &svc_expkey_cache); |
eab7e2e6 | 1219 | |
2d3bb252 | 1220 | if (IS_ERR(exp)) |
e231c2ee | 1221 | return ERR_CAST(exp); |
eab7e2e6 N |
1222 | return exp; |
1223 | } | |
1224 | ||
32c1eb0c AA |
1225 | __be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp) |
1226 | { | |
1227 | struct exp_flavor_info *f; | |
1228 | struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors; | |
1229 | ||
1230 | /* legacy gss-only clients are always OK: */ | |
1231 | if (exp->ex_client == rqstp->rq_gssclient) | |
1232 | return 0; | |
1233 | /* ip-address based client; check sec= export option: */ | |
1234 | for (f = exp->ex_flavors; f < end; f++) { | |
1235 | if (f->pseudoflavor == rqstp->rq_flavor) | |
1236 | return 0; | |
1237 | } | |
1238 | /* defaults in absence of sec= options: */ | |
1239 | if (exp->ex_nflavors == 0) { | |
1240 | if (rqstp->rq_flavor == RPC_AUTH_NULL || | |
1241 | rqstp->rq_flavor == RPC_AUTH_UNIX) | |
1242 | return 0; | |
1243 | } | |
1244 | return nfserr_wrongsec; | |
1245 | } | |
1246 | ||
0989a788 | 1247 | /* |
2ea2209f BF |
1248 | * Uses rq_client and rq_gssclient to find an export; uses rq_client (an |
1249 | * auth_unix client) if it's available and has secinfo information; | |
1250 | * otherwise, will try to use rq_gssclient. | |
1251 | * | |
0989a788 BF |
1252 | * Called from functions that handle requests; functions that do work on |
1253 | * behalf of mountd are passed a single client name to use, and should | |
1254 | * use exp_get_by_name() or exp_find(). | |
1255 | */ | |
1256 | struct svc_export * | |
1257 | rqst_exp_get_by_name(struct svc_rqst *rqstp, struct vfsmount *mnt, | |
1258 | struct dentry *dentry) | |
1259 | { | |
9a25b96c | 1260 | struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT); |
2ea2209f BF |
1261 | |
1262 | if (rqstp->rq_client == NULL) | |
1263 | goto gss; | |
3ab4d8b1 | 1264 | |
2ea2209f BF |
1265 | /* First try the auth_unix client: */ |
1266 | exp = exp_get_by_name(rqstp->rq_client, mnt, dentry, | |
1267 | &rqstp->rq_chandle); | |
1268 | if (PTR_ERR(exp) == -ENOENT) | |
1269 | goto gss; | |
1270 | if (IS_ERR(exp)) | |
1271 | return exp; | |
1272 | /* If it has secinfo, assume there are no gss/... clients */ | |
1273 | if (exp->ex_nflavors > 0) | |
1274 | return exp; | |
1275 | gss: | |
1276 | /* Otherwise, try falling back on gss client */ | |
1277 | if (rqstp->rq_gssclient == NULL) | |
1278 | return exp; | |
1279 | gssexp = exp_get_by_name(rqstp->rq_gssclient, mnt, dentry, | |
1280 | &rqstp->rq_chandle); | |
1281 | if (PTR_ERR(gssexp) == -ENOENT) | |
1282 | return exp; | |
9a25b96c | 1283 | if (!IS_ERR(exp)) |
2ea2209f BF |
1284 | exp_put(exp); |
1285 | return gssexp; | |
0989a788 BF |
1286 | } |
1287 | ||
1288 | struct svc_export * | |
1289 | rqst_exp_find(struct svc_rqst *rqstp, int fsid_type, u32 *fsidv) | |
1290 | { | |
9a25b96c | 1291 | struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT); |
2ea2209f BF |
1292 | |
1293 | if (rqstp->rq_client == NULL) | |
1294 | goto gss; | |
3ab4d8b1 | 1295 | |
2ea2209f BF |
1296 | /* First try the auth_unix client: */ |
1297 | exp = exp_find(rqstp->rq_client, fsid_type, fsidv, &rqstp->rq_chandle); | |
1298 | if (PTR_ERR(exp) == -ENOENT) | |
1299 | goto gss; | |
1300 | if (IS_ERR(exp)) | |
1301 | return exp; | |
1302 | /* If it has secinfo, assume there are no gss/... clients */ | |
1303 | if (exp->ex_nflavors > 0) | |
1304 | return exp; | |
1305 | gss: | |
1306 | /* Otherwise, try falling back on gss client */ | |
1307 | if (rqstp->rq_gssclient == NULL) | |
1308 | return exp; | |
1309 | gssexp = exp_find(rqstp->rq_gssclient, fsid_type, fsidv, | |
1310 | &rqstp->rq_chandle); | |
1311 | if (PTR_ERR(gssexp) == -ENOENT) | |
1312 | return exp; | |
9a25b96c | 1313 | if (!IS_ERR(exp)) |
2ea2209f BF |
1314 | exp_put(exp); |
1315 | return gssexp; | |
0989a788 BF |
1316 | } |
1317 | ||
1318 | struct svc_export * | |
1319 | rqst_exp_parent(struct svc_rqst *rqstp, struct vfsmount *mnt, | |
1320 | struct dentry *dentry) | |
1321 | { | |
2ea2209f BF |
1322 | struct svc_export *exp; |
1323 | ||
1324 | dget(dentry); | |
1325 | exp = rqst_exp_get_by_name(rqstp, mnt, dentry); | |
3ab4d8b1 | 1326 | |
2ea2209f BF |
1327 | while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(dentry)) { |
1328 | struct dentry *parent; | |
1329 | ||
1330 | parent = dget_parent(dentry); | |
1331 | dput(dentry); | |
1332 | dentry = parent; | |
1333 | exp = rqst_exp_get_by_name(rqstp, mnt, dentry); | |
1334 | } | |
1335 | dput(dentry); | |
1336 | return exp; | |
0989a788 | 1337 | } |
eab7e2e6 | 1338 | |
1da177e4 LT |
1339 | /* |
1340 | * Called when we need the filehandle for the root of the pseudofs, | |
1341 | * for a given NFSv4 client. The root is defined to be the | |
1342 | * export point with fsid==0 | |
1343 | */ | |
c7afef1f | 1344 | __be32 |
df547efb | 1345 | exp_pseudoroot(struct svc_rqst *rqstp, struct svc_fh *fhp) |
1da177e4 | 1346 | { |
eab7e2e6 | 1347 | struct svc_export *exp; |
c7afef1f | 1348 | __be32 rv; |
1da177e4 LT |
1349 | u32 fsidv[2]; |
1350 | ||
af6a4e28 | 1351 | mk_fsid(FSID_NUM, fsidv, 0, 0, 0, NULL); |
1da177e4 | 1352 | |
0989a788 | 1353 | exp = rqst_exp_find(rqstp, FSID_NUM, fsidv); |
6899320c BF |
1354 | if (IS_ERR(exp)) |
1355 | return nfserrno(PTR_ERR(exp)); | |
54775491 | 1356 | rv = fh_compose(fhp, exp, exp->ex_path.dentry, NULL); |
32c1eb0c AA |
1357 | if (rv) |
1358 | goto out; | |
1359 | rv = check_nfsd_access(exp, rqstp); | |
1360 | out: | |
d0ebd9c0 | 1361 | exp_put(exp); |
1da177e4 LT |
1362 | return rv; |
1363 | } | |
1364 | ||
1365 | /* Iterator */ | |
1366 | ||
1367 | static void *e_start(struct seq_file *m, loff_t *pos) | |
896440d5 | 1368 | __acquires(svc_export_cache.hash_lock) |
1da177e4 LT |
1369 | { |
1370 | loff_t n = *pos; | |
1371 | unsigned hash, export; | |
1372 | struct cache_head *ch; | |
1373 | ||
1374 | exp_readlock(); | |
1375 | read_lock(&svc_export_cache.hash_lock); | |
1376 | if (!n--) | |
bc6f02e5 | 1377 | return SEQ_START_TOKEN; |
1da177e4 LT |
1378 | hash = n >> 32; |
1379 | export = n & ((1LL<<32) - 1); | |
1380 | ||
1381 | ||
1382 | for (ch=export_table[hash]; ch; ch=ch->next) | |
1383 | if (!export--) | |
1384 | return ch; | |
1385 | n &= ~((1LL<<32) - 1); | |
1386 | do { | |
1387 | hash++; | |
1388 | n += 1LL<<32; | |
1389 | } while(hash < EXPORT_HASHMAX && export_table[hash]==NULL); | |
1390 | if (hash >= EXPORT_HASHMAX) | |
1391 | return NULL; | |
1392 | *pos = n+1; | |
1393 | return export_table[hash]; | |
1394 | } | |
1395 | ||
1396 | static void *e_next(struct seq_file *m, void *p, loff_t *pos) | |
1397 | { | |
1398 | struct cache_head *ch = p; | |
1399 | int hash = (*pos >> 32); | |
1400 | ||
bc6f02e5 | 1401 | if (p == SEQ_START_TOKEN) |
1da177e4 LT |
1402 | hash = 0; |
1403 | else if (ch->next == NULL) { | |
1404 | hash++; | |
1405 | *pos += 1LL<<32; | |
1406 | } else { | |
1407 | ++*pos; | |
1408 | return ch->next; | |
1409 | } | |
1410 | *pos &= ~((1LL<<32) - 1); | |
1411 | while (hash < EXPORT_HASHMAX && export_table[hash] == NULL) { | |
1412 | hash++; | |
1413 | *pos += 1LL<<32; | |
1414 | } | |
1415 | if (hash >= EXPORT_HASHMAX) | |
1416 | return NULL; | |
1417 | ++*pos; | |
1418 | return export_table[hash]; | |
1419 | } | |
1420 | ||
1421 | static void e_stop(struct seq_file *m, void *p) | |
896440d5 | 1422 | __releases(svc_export_cache.hash_lock) |
1da177e4 LT |
1423 | { |
1424 | read_unlock(&svc_export_cache.hash_lock); | |
1425 | exp_readunlock(); | |
1426 | } | |
1427 | ||
1428 | static struct flags { | |
1429 | int flag; | |
1430 | char *name[2]; | |
1431 | } expflags[] = { | |
1432 | { NFSEXP_READONLY, {"ro", "rw"}}, | |
1433 | { NFSEXP_INSECURE_PORT, {"insecure", ""}}, | |
1434 | { NFSEXP_ROOTSQUASH, {"root_squash", "no_root_squash"}}, | |
1435 | { NFSEXP_ALLSQUASH, {"all_squash", ""}}, | |
1436 | { NFSEXP_ASYNC, {"async", "sync"}}, | |
1437 | { NFSEXP_GATHERED_WRITES, {"wdelay", "no_wdelay"}}, | |
1438 | { NFSEXP_NOHIDE, {"nohide", ""}}, | |
1439 | { NFSEXP_CROSSMOUNT, {"crossmnt", ""}}, | |
1440 | { NFSEXP_NOSUBTREECHECK, {"no_subtree_check", ""}}, | |
1441 | { NFSEXP_NOAUTHNLM, {"insecure_locks", ""}}, | |
1442 | #ifdef MSNFS | |
1443 | { NFSEXP_MSNFS, {"msnfs", ""}}, | |
1444 | #endif | |
1445 | { 0, {"", ""}} | |
1446 | }; | |
1447 | ||
ac34cdb0 | 1448 | static void show_expflags(struct seq_file *m, int flags, int mask) |
1da177e4 | 1449 | { |
1da177e4 | 1450 | struct flags *flg; |
ac34cdb0 | 1451 | int state, first = 0; |
1da177e4 LT |
1452 | |
1453 | for (flg = expflags; flg->flag; flg++) { | |
ac34cdb0 BF |
1454 | if (flg->flag & ~mask) |
1455 | continue; | |
1456 | state = (flg->flag & flags) ? 0 : 1; | |
1da177e4 LT |
1457 | if (*flg->name[state]) |
1458 | seq_printf(m, "%s%s", first++?",":"", flg->name[state]); | |
1459 | } | |
ac34cdb0 BF |
1460 | } |
1461 | ||
91fe39d3 BF |
1462 | static void show_secinfo_flags(struct seq_file *m, int flags) |
1463 | { | |
1464 | seq_printf(m, ","); | |
1465 | show_expflags(m, flags, NFSEXP_SECINFO_FLAGS); | |
1466 | } | |
1467 | ||
1468 | static void show_secinfo(struct seq_file *m, struct svc_export *exp) | |
1469 | { | |
1470 | struct exp_flavor_info *f; | |
1471 | struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors; | |
1472 | int lastflags = 0, first = 0; | |
1473 | ||
1474 | if (exp->ex_nflavors == 0) | |
1475 | return; | |
1476 | for (f = exp->ex_flavors; f < end; f++) { | |
1477 | if (first || f->flags != lastflags) { | |
1478 | if (!first) | |
1479 | show_secinfo_flags(m, lastflags); | |
1480 | seq_printf(m, ",sec=%d", f->pseudoflavor); | |
1481 | lastflags = f->flags; | |
1482 | } else { | |
1483 | seq_printf(m, ":%d", f->pseudoflavor); | |
1484 | } | |
1485 | } | |
1486 | show_secinfo_flags(m, lastflags); | |
1487 | } | |
1488 | ||
ac34cdb0 BF |
1489 | static void exp_flags(struct seq_file *m, int flag, int fsid, |
1490 | uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fsloc) | |
1491 | { | |
1492 | show_expflags(m, flag, NFSEXP_ALLFLAGS); | |
1da177e4 | 1493 | if (flag & NFSEXP_FSID) |
ac34cdb0 | 1494 | seq_printf(m, ",fsid=%d", fsid); |
1da177e4 | 1495 | if (anonu != (uid_t)-2 && anonu != (0x10000-2)) |
3e63516c | 1496 | seq_printf(m, ",anonuid=%u", anonu); |
1da177e4 | 1497 | if (anong != (gid_t)-2 && anong != (0x10000-2)) |
3e63516c | 1498 | seq_printf(m, ",anongid=%u", anong); |
93346919 MN |
1499 | if (fsloc && fsloc->locations_count > 0) { |
1500 | char *loctype = (fsloc->migrated) ? "refer" : "replicas"; | |
1501 | int i; | |
1502 | ||
ac34cdb0 | 1503 | seq_printf(m, ",%s=", loctype); |
93346919 MN |
1504 | seq_escape(m, fsloc->locations[0].path, ",;@ \t\n\\"); |
1505 | seq_putc(m, '@'); | |
1506 | seq_escape(m, fsloc->locations[0].hosts, ",;@ \t\n\\"); | |
1507 | for (i = 1; i < fsloc->locations_count; i++) { | |
1508 | seq_putc(m, ';'); | |
1509 | seq_escape(m, fsloc->locations[i].path, ",;@ \t\n\\"); | |
1510 | seq_putc(m, '@'); | |
1511 | seq_escape(m, fsloc->locations[i].hosts, ",;@ \t\n\\"); | |
1512 | } | |
1513 | } | |
1da177e4 LT |
1514 | } |
1515 | ||
1516 | static int e_show(struct seq_file *m, void *p) | |
1517 | { | |
1518 | struct cache_head *cp = p; | |
1519 | struct svc_export *exp = container_of(cp, struct svc_export, h); | |
1da177e4 | 1520 | |
bc6f02e5 | 1521 | if (p == SEQ_START_TOKEN) { |
1da177e4 LT |
1522 | seq_puts(m, "# Version 1.1\n"); |
1523 | seq_puts(m, "# Path Client(Flags) # IPs\n"); | |
1524 | return 0; | |
1525 | } | |
1526 | ||
1da177e4 LT |
1527 | cache_get(&exp->h); |
1528 | if (cache_check(&svc_export_cache, &exp->h, NULL)) | |
1529 | return 0; | |
baab935f | 1530 | cache_put(&exp->h, &svc_export_cache); |
1da177e4 LT |
1531 | return svc_export_show(m, &svc_export_cache, cp); |
1532 | } | |
1533 | ||
1534 | struct seq_operations nfs_exports_op = { | |
1535 | .start = e_start, | |
1536 | .next = e_next, | |
1537 | .stop = e_stop, | |
1538 | .show = e_show, | |
1539 | }; | |
1540 | ||
1541 | /* | |
1542 | * Add or modify a client. | |
1543 | * Change requests may involve the list of host addresses. The list of | |
1544 | * exports and possibly existing uid maps are left untouched. | |
1545 | */ | |
1546 | int | |
1547 | exp_addclient(struct nfsctl_client *ncp) | |
1548 | { | |
1549 | struct auth_domain *dom; | |
1550 | int i, err; | |
1551 | ||
1552 | /* First, consistency check. */ | |
1553 | err = -EINVAL; | |
1554 | if (! exp_verify_string(ncp->cl_ident, NFSCLNT_IDMAX)) | |
1555 | goto out; | |
1556 | if (ncp->cl_naddr > NFSCLNT_ADDRMAX) | |
1557 | goto out; | |
1558 | ||
1559 | /* Lock the hashtable */ | |
1560 | exp_writelock(); | |
1561 | ||
1562 | dom = unix_domain_find(ncp->cl_ident); | |
1563 | ||
1564 | err = -ENOMEM; | |
1565 | if (!dom) | |
1566 | goto out_unlock; | |
1567 | ||
1568 | /* Insert client into hashtable. */ | |
1569 | for (i = 0; i < ncp->cl_naddr; i++) | |
1570 | auth_unix_add_addr(ncp->cl_addrlist[i], dom); | |
1571 | ||
1572 | auth_unix_forget_old(dom); | |
1573 | auth_domain_put(dom); | |
1574 | ||
1575 | err = 0; | |
1576 | ||
1577 | out_unlock: | |
1578 | exp_writeunlock(); | |
1579 | out: | |
1580 | return err; | |
1581 | } | |
1582 | ||
1583 | /* | |
1584 | * Delete a client given an identifier. | |
1585 | */ | |
1586 | int | |
1587 | exp_delclient(struct nfsctl_client *ncp) | |
1588 | { | |
1589 | int err; | |
1590 | struct auth_domain *dom; | |
1591 | ||
1592 | err = -EINVAL; | |
1593 | if (!exp_verify_string(ncp->cl_ident, NFSCLNT_IDMAX)) | |
1594 | goto out; | |
1595 | ||
1596 | /* Lock the hashtable */ | |
1597 | exp_writelock(); | |
1598 | ||
1599 | dom = auth_domain_find(ncp->cl_ident); | |
1600 | /* just make sure that no addresses work | |
1601 | * and that it will expire soon | |
1602 | */ | |
1603 | if (dom) { | |
1604 | err = auth_unix_forget_old(dom); | |
1da177e4 LT |
1605 | auth_domain_put(dom); |
1606 | } | |
1607 | ||
1608 | exp_writeunlock(); | |
1609 | out: | |
1610 | return err; | |
1611 | } | |
1612 | ||
1613 | /* | |
1614 | * Verify that string is non-empty and does not exceed max length. | |
1615 | */ | |
1616 | static int | |
1617 | exp_verify_string(char *cp, int max) | |
1618 | { | |
1619 | int i; | |
1620 | ||
1621 | for (i = 0; i < max; i++) | |
1622 | if (!cp[i]) | |
1623 | return i; | |
1624 | cp[i] = 0; | |
1625 | printk(KERN_NOTICE "nfsd: couldn't validate string %s\n", cp); | |
1626 | return 0; | |
1627 | } | |
1628 | ||
1629 | /* | |
1630 | * Initialize the exports module. | |
1631 | */ | |
dbf847ec | 1632 | int |
1da177e4 LT |
1633 | nfsd_export_init(void) |
1634 | { | |
dbf847ec | 1635 | int rv; |
1da177e4 LT |
1636 | dprintk("nfsd: initializing export module.\n"); |
1637 | ||
dbf847ec BF |
1638 | rv = cache_register(&svc_export_cache); |
1639 | if (rv) | |
1640 | return rv; | |
1641 | rv = cache_register(&svc_expkey_cache); | |
1642 | if (rv) | |
1643 | cache_unregister(&svc_export_cache); | |
1644 | return rv; | |
1da177e4 LT |
1645 | |
1646 | } | |
1647 | ||
1648 | /* | |
1649 | * Flush exports table - called when last nfsd thread is killed | |
1650 | */ | |
1651 | void | |
1652 | nfsd_export_flush(void) | |
1653 | { | |
1654 | exp_writelock(); | |
1655 | cache_purge(&svc_expkey_cache); | |
1656 | cache_purge(&svc_export_cache); | |
1657 | exp_writeunlock(); | |
1658 | } | |
1659 | ||
1660 | /* | |
1661 | * Shutdown the exports module. | |
1662 | */ | |
1663 | void | |
1664 | nfsd_export_shutdown(void) | |
1665 | { | |
1666 | ||
1667 | dprintk("nfsd: shutting down export module.\n"); | |
1668 | ||
1669 | exp_writelock(); | |
1670 | ||
df95a9d4 BF |
1671 | cache_unregister(&svc_expkey_cache); |
1672 | cache_unregister(&svc_export_cache); | |
1da177e4 LT |
1673 | svcauth_unix_purge(); |
1674 | ||
1675 | exp_writeunlock(); | |
1676 | dprintk("nfsd: export shutdown complete.\n"); | |
1677 | } |