Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * NFS exporting and validation. |
3 | * | |
4 | * We maintain a list of clients, each of which has a list of | |
5 | * exports. To export an fs to a given client, you first have | |
6 | * to create the client entry with NFSCTL_ADDCLIENT, which | |
7 | * creates a client control block and adds it to the hash | |
8 | * table. Then, you call NFSCTL_EXPORT for each fs. | |
9 | * | |
10 | * | |
11 | * Copyright (C) 1995, 1996 Olaf Kirch, <okir@monad.swb.de> | |
12 | */ | |
13 | ||
5a0e3ad6 | 14 | #include <linux/slab.h> |
1da177e4 | 15 | #include <linux/namei.h> |
f35279d3 | 16 | #include <linux/module.h> |
a5694255 | 17 | #include <linux/exportfs.h> |
1da177e4 | 18 | |
1da177e4 | 19 | #include <linux/nfsd/syscall.h> |
f15364bd | 20 | #include <net/ipv6.h> |
1da177e4 | 21 | |
9a74af21 | 22 | #include "nfsd.h" |
1557aca7 | 23 | #include "nfsfh.h" |
9a74af21 | 24 | |
1da177e4 | 25 | #define NFSDDBG_FACILITY NFSDDBG_EXPORT |
1da177e4 LT |
26 | |
27 | typedef struct auth_domain svc_client; | |
28 | typedef struct svc_export svc_export; | |
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) | |
42 | static struct cache_head *expkey_table[EXPKEY_HASHMAX]; | |
43 | ||
74cae61a | 44 | static void expkey_put(struct kref *ref) |
1da177e4 | 45 | { |
baab935f N |
46 | struct svc_expkey *key = container_of(ref, struct svc_expkey, h.ref); |
47 | ||
48 | if (test_bit(CACHE_VALID, &key->h.flags) && | |
e83aece3 JB |
49 | !test_bit(CACHE_NEGATIVE, &key->h.flags)) |
50 | path_put(&key->ek_path); | |
baab935f N |
51 | auth_domain_put(key->ek_client); |
52 | kfree(key); | |
1da177e4 LT |
53 | } |
54 | ||
55 | static void expkey_request(struct cache_detail *cd, | |
56 | struct cache_head *h, | |
57 | char **bpp, int *blen) | |
58 | { | |
59 | /* client fsidtype \xfsid */ | |
60 | struct svc_expkey *ek = container_of(h, struct svc_expkey, h); | |
61 | char type[5]; | |
62 | ||
63 | qword_add(bpp, blen, ek->ek_client->name); | |
64 | snprintf(type, 5, "%d", ek->ek_fsidtype); | |
65 | qword_add(bpp, blen, type); | |
66 | qword_addhex(bpp, blen, (char*)ek->ek_fsid, key_len(ek->ek_fsidtype)); | |
67 | (*bpp)[-1] = '\n'; | |
68 | } | |
69 | ||
bc74b4f5 TM |
70 | static int expkey_upcall(struct cache_detail *cd, struct cache_head *h) |
71 | { | |
72 | return sunrpc_cache_pipe_upcall(cd, h, expkey_request); | |
73 | } | |
74 | ||
8d270f7f N |
75 | static struct svc_expkey *svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old); |
76 | static struct svc_expkey *svc_expkey_lookup(struct svc_expkey *); | |
74cae61a AB |
77 | static struct cache_detail svc_expkey_cache; |
78 | ||
1da177e4 LT |
79 | static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen) |
80 | { | |
81 | /* client fsidtype fsid [path] */ | |
82 | char *buf; | |
83 | int len; | |
84 | struct auth_domain *dom = NULL; | |
85 | int err; | |
86 | int fsidtype; | |
87 | char *ep; | |
88 | struct svc_expkey key; | |
30bc4dfd | 89 | struct svc_expkey *ek = NULL; |
1da177e4 LT |
90 | |
91 | if (mesg[mlen-1] != '\n') | |
92 | return -EINVAL; | |
93 | mesg[mlen-1] = 0; | |
94 | ||
95 | buf = kmalloc(PAGE_SIZE, GFP_KERNEL); | |
96 | err = -ENOMEM; | |
30bc4dfd BF |
97 | if (!buf) |
98 | goto out; | |
1da177e4 LT |
99 | |
100 | err = -EINVAL; | |
101 | if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0) | |
102 | goto out; | |
103 | ||
104 | err = -ENOENT; | |
105 | dom = auth_domain_find(buf); | |
106 | if (!dom) | |
107 | goto out; | |
108 | dprintk("found domain %s\n", buf); | |
109 | ||
110 | err = -EINVAL; | |
111 | if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0) | |
112 | goto out; | |
113 | fsidtype = simple_strtoul(buf, &ep, 10); | |
114 | if (*ep) | |
115 | goto out; | |
116 | dprintk("found fsidtype %d\n", fsidtype); | |
4bdff8c0 | 117 | if (key_len(fsidtype)==0) /* invalid type */ |
1da177e4 LT |
118 | goto out; |
119 | if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0) | |
120 | goto out; | |
121 | dprintk("found fsid length %d\n", len); | |
122 | if (len != key_len(fsidtype)) | |
123 | goto out; | |
124 | ||
125 | /* OK, we seem to have a valid key */ | |
126 | key.h.flags = 0; | |
127 | key.h.expiry_time = get_expiry(&mesg); | |
128 | if (key.h.expiry_time == 0) | |
129 | goto out; | |
130 | ||
131 | key.ek_client = dom; | |
132 | key.ek_fsidtype = fsidtype; | |
133 | memcpy(key.ek_fsid, buf, len); | |
134 | ||
8d270f7f N |
135 | ek = svc_expkey_lookup(&key); |
136 | err = -ENOMEM; | |
137 | if (!ek) | |
138 | goto out; | |
139 | ||
1da177e4 | 140 | /* now we want a pathname, or empty meaning NEGATIVE */ |
8d270f7f | 141 | err = -EINVAL; |
30bc4dfd BF |
142 | len = qword_get(&mesg, buf, PAGE_SIZE); |
143 | if (len < 0) | |
1da177e4 LT |
144 | goto out; |
145 | dprintk("Path seems to be <%s>\n", buf); | |
146 | err = 0; | |
147 | if (len == 0) { | |
1da177e4 | 148 | set_bit(CACHE_NEGATIVE, &key.h.flags); |
8d270f7f | 149 | ek = svc_expkey_update(&key, ek); |
30bc4dfd BF |
150 | if (!ek) |
151 | err = -ENOMEM; | |
1da177e4 | 152 | } else { |
a63bb996 | 153 | err = kern_path(buf, 0, &key.ek_path); |
30bc4dfd | 154 | if (err) |
1da177e4 LT |
155 | goto out; |
156 | ||
157 | dprintk("Found the path %s\n", buf); | |
e83aece3 | 158 | |
8d270f7f | 159 | ek = svc_expkey_update(&key, ek); |
30bc4dfd | 160 | if (!ek) |
8d270f7f | 161 | err = -ENOMEM; |
a63bb996 | 162 | path_put(&key.ek_path); |
1da177e4 LT |
163 | } |
164 | cache_flush(); | |
165 | out: | |
30bc4dfd BF |
166 | if (ek) |
167 | cache_put(&ek->h, &svc_expkey_cache); | |
1da177e4 LT |
168 | if (dom) |
169 | auth_domain_put(dom); | |
f99d49ad | 170 | kfree(buf); |
1da177e4 LT |
171 | return err; |
172 | } | |
173 | ||
174 | static int expkey_show(struct seq_file *m, | |
175 | struct cache_detail *cd, | |
176 | struct cache_head *h) | |
177 | { | |
178 | struct svc_expkey *ek ; | |
af6a4e28 | 179 | int i; |
1da177e4 LT |
180 | |
181 | if (h ==NULL) { | |
182 | seq_puts(m, "#domain fsidtype fsid [path]\n"); | |
183 | return 0; | |
184 | } | |
185 | ek = container_of(h, struct svc_expkey, h); | |
af6a4e28 N |
186 | seq_printf(m, "%s %d 0x", ek->ek_client->name, |
187 | ek->ek_fsidtype); | |
188 | for (i=0; i < key_len(ek->ek_fsidtype)/4; i++) | |
189 | seq_printf(m, "%08x", ek->ek_fsid[i]); | |
1da177e4 LT |
190 | if (test_bit(CACHE_VALID, &h->flags) && |
191 | !test_bit(CACHE_NEGATIVE, &h->flags)) { | |
192 | seq_printf(m, " "); | |
c32c2f63 | 193 | seq_path(m, &ek->ek_path, "\\ \t\n"); |
1da177e4 LT |
194 | } |
195 | seq_printf(m, "\n"); | |
196 | return 0; | |
197 | } | |
1da177e4 | 198 | |
8d270f7f | 199 | static inline int expkey_match (struct cache_head *a, struct cache_head *b) |
1da177e4 | 200 | { |
8d270f7f N |
201 | struct svc_expkey *orig = container_of(a, struct svc_expkey, h); |
202 | struct svc_expkey *new = container_of(b, struct svc_expkey, h); | |
203 | ||
204 | if (orig->ek_fsidtype != new->ek_fsidtype || | |
205 | orig->ek_client != new->ek_client || | |
206 | memcmp(orig->ek_fsid, new->ek_fsid, key_len(orig->ek_fsidtype)) != 0) | |
1da177e4 LT |
207 | return 0; |
208 | return 1; | |
209 | } | |
210 | ||
8d270f7f N |
211 | static inline void expkey_init(struct cache_head *cnew, |
212 | struct cache_head *citem) | |
1da177e4 | 213 | { |
8d270f7f N |
214 | struct svc_expkey *new = container_of(cnew, struct svc_expkey, h); |
215 | struct svc_expkey *item = container_of(citem, struct svc_expkey, h); | |
216 | ||
efc36aa5 | 217 | kref_get(&item->ek_client->ref); |
1da177e4 LT |
218 | new->ek_client = item->ek_client; |
219 | new->ek_fsidtype = item->ek_fsidtype; | |
af6a4e28 N |
220 | |
221 | memcpy(new->ek_fsid, item->ek_fsid, sizeof(new->ek_fsid)); | |
1da177e4 LT |
222 | } |
223 | ||
8d270f7f N |
224 | static inline void expkey_update(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 | ||
e83aece3 JB |
230 | new->ek_path = item->ek_path; |
231 | path_get(&item->ek_path); | |
1da177e4 LT |
232 | } |
233 | ||
8d270f7f N |
234 | static struct cache_head *expkey_alloc(void) |
235 | { | |
236 | struct svc_expkey *i = kmalloc(sizeof(*i), GFP_KERNEL); | |
237 | if (i) | |
238 | return &i->h; | |
239 | else | |
240 | return NULL; | |
241 | } | |
242 | ||
74cae61a | 243 | static struct cache_detail svc_expkey_cache = { |
8d270f7f N |
244 | .owner = THIS_MODULE, |
245 | .hash_size = EXPKEY_HASHMAX, | |
246 | .hash_table = expkey_table, | |
247 | .name = "nfsd.fh", | |
248 | .cache_put = expkey_put, | |
bc74b4f5 | 249 | .cache_upcall = expkey_upcall, |
8d270f7f N |
250 | .cache_parse = expkey_parse, |
251 | .cache_show = expkey_show, | |
252 | .match = expkey_match, | |
253 | .init = expkey_init, | |
254 | .update = expkey_update, | |
255 | .alloc = expkey_alloc, | |
256 | }; | |
257 | ||
61f8603d N |
258 | static int |
259 | svc_expkey_hash(struct svc_expkey *item) | |
8d270f7f | 260 | { |
8d270f7f N |
261 | int hash = item->ek_fsidtype; |
262 | char * cp = (char*)item->ek_fsid; | |
263 | int len = key_len(item->ek_fsidtype); | |
264 | ||
265 | hash ^= hash_mem(cp, len, EXPKEY_HASHBITS); | |
266 | hash ^= hash_ptr(item->ek_client, EXPKEY_HASHBITS); | |
267 | hash &= EXPKEY_HASHMASK; | |
61f8603d N |
268 | return hash; |
269 | } | |
270 | ||
271 | static struct svc_expkey * | |
272 | svc_expkey_lookup(struct svc_expkey *item) | |
273 | { | |
274 | struct cache_head *ch; | |
275 | int hash = svc_expkey_hash(item); | |
8d270f7f N |
276 | |
277 | ch = sunrpc_cache_lookup(&svc_expkey_cache, &item->h, | |
278 | hash); | |
279 | if (ch) | |
280 | return container_of(ch, struct svc_expkey, h); | |
281 | else | |
282 | return NULL; | |
283 | } | |
284 | ||
285 | static struct svc_expkey * | |
286 | svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old) | |
287 | { | |
288 | struct cache_head *ch; | |
61f8603d | 289 | int hash = svc_expkey_hash(new); |
8d270f7f N |
290 | |
291 | ch = sunrpc_cache_update(&svc_expkey_cache, &new->h, | |
292 | &old->h, hash); | |
293 | if (ch) | |
294 | return container_of(ch, struct svc_expkey, h); | |
295 | else | |
296 | return NULL; | |
297 | } | |
298 | ||
1da177e4 LT |
299 | |
300 | #define EXPORT_HASHBITS 8 | |
301 | #define EXPORT_HASHMAX (1<< EXPORT_HASHBITS) | |
1da177e4 LT |
302 | |
303 | static struct cache_head *export_table[EXPORT_HASHMAX]; | |
304 | ||
93346919 MN |
305 | static void nfsd4_fslocs_free(struct nfsd4_fs_locations *fsloc) |
306 | { | |
307 | int i; | |
308 | ||
309 | for (i = 0; i < fsloc->locations_count; i++) { | |
310 | kfree(fsloc->locations[i].path); | |
311 | kfree(fsloc->locations[i].hosts); | |
312 | } | |
313 | kfree(fsloc->locations); | |
314 | } | |
315 | ||
baab935f | 316 | static void svc_export_put(struct kref *ref) |
1da177e4 | 317 | { |
baab935f | 318 | struct svc_export *exp = container_of(ref, struct svc_export, h.ref); |
54775491 | 319 | path_put(&exp->ex_path); |
baab935f | 320 | auth_domain_put(exp->ex_client); |
54775491 | 321 | kfree(exp->ex_pathname); |
93346919 | 322 | nfsd4_fslocs_free(&exp->ex_fslocs); |
baab935f | 323 | kfree(exp); |
1da177e4 LT |
324 | } |
325 | ||
326 | static void svc_export_request(struct cache_detail *cd, | |
327 | struct cache_head *h, | |
328 | char **bpp, int *blen) | |
329 | { | |
330 | /* client path */ | |
331 | struct svc_export *exp = container_of(h, struct svc_export, h); | |
332 | char *pth; | |
333 | ||
334 | qword_add(bpp, blen, exp->ex_client->name); | |
cf28b486 | 335 | pth = d_path(&exp->ex_path, *bpp, *blen); |
1da177e4 LT |
336 | if (IS_ERR(pth)) { |
337 | /* is this correct? */ | |
338 | (*bpp)[0] = '\n'; | |
339 | return; | |
340 | } | |
341 | qword_add(bpp, blen, pth); | |
342 | (*bpp)[-1] = '\n'; | |
343 | } | |
344 | ||
bc74b4f5 TM |
345 | static int svc_export_upcall(struct cache_detail *cd, struct cache_head *h) |
346 | { | |
347 | return sunrpc_cache_pipe_upcall(cd, h, svc_export_request); | |
348 | } | |
349 | ||
74cae61a AB |
350 | static struct svc_export *svc_export_update(struct svc_export *new, |
351 | struct svc_export *old); | |
4f7774c3 | 352 | static struct svc_export *svc_export_lookup(struct svc_export *); |
1da177e4 | 353 | |
774b1478 | 354 | static int check_export(struct inode *inode, int *flags, unsigned char *uuid) |
1da177e4 LT |
355 | { |
356 | ||
f2ca7153 BF |
357 | /* |
358 | * We currently export only dirs, regular files, and (for v4 | |
359 | * pseudoroot) symlinks. | |
1da177e4 LT |
360 | */ |
361 | if (!S_ISDIR(inode->i_mode) && | |
f2ca7153 | 362 | !S_ISLNK(inode->i_mode) && |
1da177e4 LT |
363 | !S_ISREG(inode->i_mode)) |
364 | return -ENOTDIR; | |
365 | ||
774b1478 BF |
366 | /* |
367 | * Mountd should never pass down a writeable V4ROOT export, but, | |
368 | * just to make sure: | |
369 | */ | |
370 | if (*flags & NFSEXP_V4ROOT) | |
371 | *flags |= NFSEXP_READONLY; | |
372 | ||
1da177e4 LT |
373 | /* There are two requirements on a filesystem to be exportable. |
374 | * 1: We must be able to identify the filesystem from a number. | |
375 | * either a device number (so FS_REQUIRES_DEV needed) | |
af6a4e28 | 376 | * or an FSID number (so NFSEXP_FSID or ->uuid is needed). |
1da177e4 LT |
377 | * 2: We must be able to find an inode from a filehandle. |
378 | * This means that s_export_op must be set. | |
379 | */ | |
380 | if (!(inode->i_sb->s_type->fs_flags & FS_REQUIRES_DEV) && | |
774b1478 | 381 | !(*flags & NFSEXP_FSID) && |
af6a4e28 | 382 | uuid == NULL) { |
3e3b4800 | 383 | dprintk("exp_export: export of non-dev fs without fsid\n"); |
1da177e4 LT |
384 | return -EINVAL; |
385 | } | |
cfaea787 CH |
386 | |
387 | if (!inode->i_sb->s_export_op || | |
388 | !inode->i_sb->s_export_op->fh_to_dentry) { | |
1da177e4 LT |
389 | dprintk("exp_export: export of invalid fs type.\n"); |
390 | return -EINVAL; | |
391 | } | |
392 | ||
1da177e4 LT |
393 | return 0; |
394 | ||
395 | } | |
396 | ||
93346919 MN |
397 | #ifdef CONFIG_NFSD_V4 |
398 | ||
399 | static int | |
400 | fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc) | |
401 | { | |
402 | int len; | |
403 | int migrated, i, err; | |
404 | ||
93346919 MN |
405 | /* listsize */ |
406 | err = get_int(mesg, &fsloc->locations_count); | |
407 | if (err) | |
408 | return err; | |
409 | if (fsloc->locations_count > MAX_FS_LOCATIONS) | |
410 | return -EINVAL; | |
411 | if (fsloc->locations_count == 0) | |
412 | return 0; | |
413 | ||
414 | fsloc->locations = kzalloc(fsloc->locations_count | |
415 | * sizeof(struct nfsd4_fs_location), GFP_KERNEL); | |
416 | if (!fsloc->locations) | |
417 | return -ENOMEM; | |
418 | for (i=0; i < fsloc->locations_count; i++) { | |
419 | /* colon separated host list */ | |
420 | err = -EINVAL; | |
421 | len = qword_get(mesg, buf, PAGE_SIZE); | |
422 | if (len <= 0) | |
423 | goto out_free_all; | |
424 | err = -ENOMEM; | |
425 | fsloc->locations[i].hosts = kstrdup(buf, GFP_KERNEL); | |
426 | if (!fsloc->locations[i].hosts) | |
427 | goto out_free_all; | |
428 | err = -EINVAL; | |
429 | /* slash separated path component list */ | |
430 | len = qword_get(mesg, buf, PAGE_SIZE); | |
431 | if (len <= 0) | |
432 | goto out_free_all; | |
433 | err = -ENOMEM; | |
434 | fsloc->locations[i].path = kstrdup(buf, GFP_KERNEL); | |
435 | if (!fsloc->locations[i].path) | |
436 | goto out_free_all; | |
437 | } | |
438 | /* migrated */ | |
439 | err = get_int(mesg, &migrated); | |
440 | if (err) | |
441 | goto out_free_all; | |
442 | err = -EINVAL; | |
443 | if (migrated < 0 || migrated > 1) | |
444 | goto out_free_all; | |
445 | fsloc->migrated = migrated; | |
446 | return 0; | |
447 | out_free_all: | |
448 | nfsd4_fslocs_free(fsloc); | |
449 | return err; | |
450 | } | |
451 | ||
e677bfe4 AA |
452 | static int secinfo_parse(char **mesg, char *buf, struct svc_export *exp) |
453 | { | |
454 | int listsize, err; | |
455 | struct exp_flavor_info *f; | |
456 | ||
457 | err = get_int(mesg, &listsize); | |
458 | if (err) | |
459 | return err; | |
460 | if (listsize < 0 || listsize > MAX_SECINFO_LIST) | |
461 | return -EINVAL; | |
462 | ||
463 | for (f = exp->ex_flavors; f < exp->ex_flavors + listsize; f++) { | |
464 | err = get_int(mesg, &f->pseudoflavor); | |
465 | if (err) | |
466 | return err; | |
467 | /* | |
80492e7d RK |
468 | * XXX: It would be nice to also check whether this |
469 | * pseudoflavor is supported, so we can discover the | |
470 | * problem at export time instead of when a client fails | |
471 | * to authenticate. | |
e677bfe4 | 472 | */ |
e677bfe4 AA |
473 | err = get_int(mesg, &f->flags); |
474 | if (err) | |
475 | return err; | |
476 | /* Only some flags are allowed to differ between flavors: */ | |
477 | if (~NFSEXP_SECINFO_FLAGS & (f->flags ^ exp->ex_flags)) | |
478 | return -EINVAL; | |
479 | } | |
480 | exp->ex_nflavors = listsize; | |
481 | return 0; | |
482 | } | |
483 | ||
93346919 | 484 | #else /* CONFIG_NFSD_V4 */ |
e677bfe4 AA |
485 | static inline int |
486 | fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc){return 0;} | |
487 | static inline int | |
488 | secinfo_parse(char **mesg, char *buf, struct svc_export *exp) { return 0; } | |
93346919 MN |
489 | #endif |
490 | ||
1da177e4 LT |
491 | static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen) |
492 | { | |
493 | /* client path expiry [flags anonuid anongid fsid] */ | |
494 | char *buf; | |
495 | int len; | |
496 | int err; | |
497 | struct auth_domain *dom = NULL; | |
c1a2a475 | 498 | struct svc_export exp = {}, *expp; |
1da177e4 LT |
499 | int an_int; |
500 | ||
1da177e4 LT |
501 | if (mesg[mlen-1] != '\n') |
502 | return -EINVAL; | |
503 | mesg[mlen-1] = 0; | |
504 | ||
505 | buf = kmalloc(PAGE_SIZE, GFP_KERNEL); | |
c1a2a475 AV |
506 | if (!buf) |
507 | return -ENOMEM; | |
1da177e4 LT |
508 | |
509 | /* client */ | |
1da177e4 | 510 | err = -EINVAL; |
c1a2a475 AV |
511 | len = qword_get(&mesg, buf, PAGE_SIZE); |
512 | if (len <= 0) | |
513 | goto out; | |
1da177e4 LT |
514 | |
515 | err = -ENOENT; | |
516 | dom = auth_domain_find(buf); | |
517 | if (!dom) | |
518 | goto out; | |
519 | ||
520 | /* path */ | |
521 | err = -EINVAL; | |
c1a2a475 AV |
522 | if ((len = qword_get(&mesg, buf, PAGE_SIZE)) <= 0) |
523 | goto out1; | |
524 | ||
525 | err = kern_path(buf, 0, &exp.ex_path); | |
526 | if (err) | |
527 | goto out1; | |
1da177e4 | 528 | |
1da177e4 | 529 | exp.ex_client = dom; |
c1a2a475 | 530 | |
b009a873 | 531 | err = -ENOMEM; |
c1a2a475 | 532 | exp.ex_pathname = kstrdup(buf, GFP_KERNEL); |
54775491 | 533 | if (!exp.ex_pathname) |
c1a2a475 | 534 | goto out2; |
1da177e4 LT |
535 | |
536 | /* expiry */ | |
537 | err = -EINVAL; | |
538 | exp.h.expiry_time = get_expiry(&mesg); | |
539 | if (exp.h.expiry_time == 0) | |
c1a2a475 | 540 | goto out3; |
1da177e4 LT |
541 | |
542 | /* flags */ | |
543 | err = get_int(&mesg, &an_int); | |
4a4b8831 BF |
544 | if (err == -ENOENT) { |
545 | err = 0; | |
1da177e4 | 546 | set_bit(CACHE_NEGATIVE, &exp.h.flags); |
4a4b8831 | 547 | } else { |
c1a2a475 AV |
548 | if (err || an_int < 0) |
549 | goto out3; | |
1da177e4 LT |
550 | exp.ex_flags= an_int; |
551 | ||
552 | /* anon uid */ | |
553 | err = get_int(&mesg, &an_int); | |
c1a2a475 AV |
554 | if (err) |
555 | goto out3; | |
1da177e4 LT |
556 | exp.ex_anon_uid= an_int; |
557 | ||
558 | /* anon gid */ | |
559 | err = get_int(&mesg, &an_int); | |
c1a2a475 AV |
560 | if (err) |
561 | goto out3; | |
1da177e4 LT |
562 | exp.ex_anon_gid= an_int; |
563 | ||
564 | /* fsid */ | |
565 | err = get_int(&mesg, &an_int); | |
c1a2a475 AV |
566 | if (err) |
567 | goto out3; | |
1da177e4 LT |
568 | exp.ex_fsid = an_int; |
569 | ||
af6a4e28 N |
570 | while ((len = qword_get(&mesg, buf, PAGE_SIZE)) > 0) { |
571 | if (strcmp(buf, "fsloc") == 0) | |
572 | err = fsloc_parse(&mesg, buf, &exp.ex_fslocs); | |
573 | else if (strcmp(buf, "uuid") == 0) { | |
574 | /* expect a 16 byte uuid encoded as \xXXXX... */ | |
575 | len = qword_get(&mesg, buf, PAGE_SIZE); | |
576 | if (len != 16) | |
577 | err = -EINVAL; | |
578 | else { | |
579 | exp.ex_uuid = | |
580 | kmemdup(buf, 16, GFP_KERNEL); | |
581 | if (exp.ex_uuid == NULL) | |
582 | err = -ENOMEM; | |
583 | } | |
e677bfe4 AA |
584 | } else if (strcmp(buf, "secinfo") == 0) |
585 | err = secinfo_parse(&mesg, buf, &exp); | |
586 | else | |
af6a4e28 N |
587 | /* quietly ignore unknown words and anything |
588 | * following. Newer user-space can try to set | |
589 | * new values, then see what the result was. | |
590 | */ | |
591 | break; | |
592 | if (err) | |
c1a2a475 | 593 | goto out4; |
af6a4e28 | 594 | } |
93346919 | 595 | |
774b1478 | 596 | err = check_export(exp.ex_path.dentry->d_inode, &exp.ex_flags, |
af6a4e28 | 597 | exp.ex_uuid); |
c1a2a475 AV |
598 | if (err) |
599 | goto out4; | |
1da177e4 LT |
600 | } |
601 | ||
4f7774c3 | 602 | expp = svc_export_lookup(&exp); |
1da177e4 | 603 | if (expp) |
4f7774c3 N |
604 | expp = svc_export_update(&exp, expp); |
605 | else | |
606 | err = -ENOMEM; | |
1da177e4 | 607 | cache_flush(); |
4f7774c3 N |
608 | if (expp == NULL) |
609 | err = -ENOMEM; | |
610 | else | |
611 | exp_put(expp); | |
c1a2a475 | 612 | out4: |
af6a4e28 N |
613 | nfsd4_fslocs_free(&exp.ex_fslocs); |
614 | kfree(exp.ex_uuid); | |
c1a2a475 | 615 | out3: |
54775491 | 616 | kfree(exp.ex_pathname); |
c1a2a475 AV |
617 | out2: |
618 | path_put(&exp.ex_path); | |
619 | out1: | |
620 | auth_domain_put(dom); | |
621 | out: | |
f99d49ad | 622 | kfree(buf); |
1da177e4 LT |
623 | return err; |
624 | } | |
625 | ||
93346919 MN |
626 | static void exp_flags(struct seq_file *m, int flag, int fsid, |
627 | uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fslocs); | |
91fe39d3 | 628 | static void show_secinfo(struct seq_file *m, struct svc_export *exp); |
1da177e4 LT |
629 | |
630 | static int svc_export_show(struct seq_file *m, | |
631 | struct cache_detail *cd, | |
632 | struct cache_head *h) | |
633 | { | |
634 | struct svc_export *exp ; | |
635 | ||
636 | if (h ==NULL) { | |
637 | seq_puts(m, "#path domain(flags)\n"); | |
638 | return 0; | |
639 | } | |
640 | exp = container_of(h, struct svc_export, h); | |
c32c2f63 | 641 | seq_path(m, &exp->ex_path, " \t\n\\"); |
1da177e4 LT |
642 | seq_putc(m, '\t'); |
643 | seq_escape(m, exp->ex_client->name, " \t\n\\"); | |
644 | seq_putc(m, '('); | |
645 | if (test_bit(CACHE_VALID, &h->flags) && | |
af6a4e28 | 646 | !test_bit(CACHE_NEGATIVE, &h->flags)) { |
93346919 MN |
647 | exp_flags(m, exp->ex_flags, exp->ex_fsid, |
648 | exp->ex_anon_uid, exp->ex_anon_gid, &exp->ex_fslocs); | |
af6a4e28 N |
649 | if (exp->ex_uuid) { |
650 | int i; | |
651 | seq_puts(m, ",uuid="); | |
652 | for (i=0; i<16; i++) { | |
653 | if ((i&3) == 0 && i) | |
654 | seq_putc(m, ':'); | |
655 | seq_printf(m, "%02x", exp->ex_uuid[i]); | |
656 | } | |
657 | } | |
91fe39d3 | 658 | show_secinfo(m, exp); |
af6a4e28 | 659 | } |
1da177e4 LT |
660 | seq_puts(m, ")\n"); |
661 | return 0; | |
662 | } | |
4f7774c3 | 663 | static int svc_export_match(struct cache_head *a, struct cache_head *b) |
1da177e4 | 664 | { |
4f7774c3 N |
665 | struct svc_export *orig = container_of(a, struct svc_export, h); |
666 | struct svc_export *new = container_of(b, struct svc_export, h); | |
667 | return orig->ex_client == new->ex_client && | |
54775491 JB |
668 | orig->ex_path.dentry == new->ex_path.dentry && |
669 | orig->ex_path.mnt == new->ex_path.mnt; | |
1da177e4 | 670 | } |
4f7774c3 N |
671 | |
672 | static void svc_export_init(struct cache_head *cnew, struct cache_head *citem) | |
1da177e4 | 673 | { |
4f7774c3 N |
674 | struct svc_export *new = container_of(cnew, struct svc_export, h); |
675 | struct svc_export *item = container_of(citem, struct svc_export, h); | |
676 | ||
efc36aa5 | 677 | kref_get(&item->ex_client->ref); |
1da177e4 | 678 | new->ex_client = item->ex_client; |
54775491 JB |
679 | new->ex_path.dentry = dget(item->ex_path.dentry); |
680 | new->ex_path.mnt = mntget(item->ex_path.mnt); | |
681 | new->ex_pathname = NULL; | |
93346919 MN |
682 | new->ex_fslocs.locations = NULL; |
683 | new->ex_fslocs.locations_count = 0; | |
684 | new->ex_fslocs.migrated = 0; | |
1da177e4 LT |
685 | } |
686 | ||
4f7774c3 | 687 | static void export_update(struct cache_head *cnew, struct cache_head *citem) |
1da177e4 | 688 | { |
4f7774c3 N |
689 | struct svc_export *new = container_of(cnew, struct svc_export, h); |
690 | struct svc_export *item = container_of(citem, struct svc_export, h); | |
e677bfe4 | 691 | int i; |
4f7774c3 | 692 | |
1da177e4 LT |
693 | new->ex_flags = item->ex_flags; |
694 | new->ex_anon_uid = item->ex_anon_uid; | |
695 | new->ex_anon_gid = item->ex_anon_gid; | |
696 | new->ex_fsid = item->ex_fsid; | |
af6a4e28 N |
697 | new->ex_uuid = item->ex_uuid; |
698 | item->ex_uuid = NULL; | |
54775491 JB |
699 | new->ex_pathname = item->ex_pathname; |
700 | item->ex_pathname = NULL; | |
93346919 MN |
701 | new->ex_fslocs.locations = item->ex_fslocs.locations; |
702 | item->ex_fslocs.locations = NULL; | |
703 | new->ex_fslocs.locations_count = item->ex_fslocs.locations_count; | |
704 | item->ex_fslocs.locations_count = 0; | |
705 | new->ex_fslocs.migrated = item->ex_fslocs.migrated; | |
706 | item->ex_fslocs.migrated = 0; | |
e677bfe4 AA |
707 | new->ex_nflavors = item->ex_nflavors; |
708 | for (i = 0; i < MAX_SECINFO_LIST; i++) { | |
709 | new->ex_flavors[i] = item->ex_flavors[i]; | |
710 | } | |
1da177e4 LT |
711 | } |
712 | ||
4f7774c3 N |
713 | static struct cache_head *svc_export_alloc(void) |
714 | { | |
715 | struct svc_export *i = kmalloc(sizeof(*i), GFP_KERNEL); | |
716 | if (i) | |
717 | return &i->h; | |
718 | else | |
719 | return NULL; | |
720 | } | |
721 | ||
722 | struct cache_detail svc_export_cache = { | |
723 | .owner = THIS_MODULE, | |
724 | .hash_size = EXPORT_HASHMAX, | |
725 | .hash_table = export_table, | |
726 | .name = "nfsd.export", | |
727 | .cache_put = svc_export_put, | |
bc74b4f5 | 728 | .cache_upcall = svc_export_upcall, |
4f7774c3 N |
729 | .cache_parse = svc_export_parse, |
730 | .cache_show = svc_export_show, | |
731 | .match = svc_export_match, | |
732 | .init = svc_export_init, | |
733 | .update = export_update, | |
734 | .alloc = svc_export_alloc, | |
735 | }; | |
736 | ||
61f8603d N |
737 | static int |
738 | svc_export_hash(struct svc_export *exp) | |
4f7774c3 | 739 | { |
4f7774c3 | 740 | int hash; |
61f8603d | 741 | |
4f7774c3 | 742 | hash = hash_ptr(exp->ex_client, EXPORT_HASHBITS); |
54775491 JB |
743 | hash ^= hash_ptr(exp->ex_path.dentry, EXPORT_HASHBITS); |
744 | hash ^= hash_ptr(exp->ex_path.mnt, EXPORT_HASHBITS); | |
61f8603d N |
745 | return hash; |
746 | } | |
747 | ||
748 | static struct svc_export * | |
749 | svc_export_lookup(struct svc_export *exp) | |
750 | { | |
751 | struct cache_head *ch; | |
752 | int hash = svc_export_hash(exp); | |
4f7774c3 N |
753 | |
754 | ch = sunrpc_cache_lookup(&svc_export_cache, &exp->h, | |
755 | hash); | |
756 | if (ch) | |
757 | return container_of(ch, struct svc_export, h); | |
758 | else | |
759 | return NULL; | |
760 | } | |
761 | ||
74cae61a | 762 | static struct svc_export * |
4f7774c3 N |
763 | svc_export_update(struct svc_export *new, struct svc_export *old) |
764 | { | |
765 | struct cache_head *ch; | |
61f8603d | 766 | int hash = svc_export_hash(old); |
4f7774c3 N |
767 | |
768 | ch = sunrpc_cache_update(&svc_export_cache, &new->h, | |
769 | &old->h, | |
770 | hash); | |
771 | if (ch) | |
772 | return container_of(ch, struct svc_export, h); | |
773 | else | |
774 | return NULL; | |
775 | } | |
1da177e4 LT |
776 | |
777 | ||
74cae61a | 778 | static struct svc_expkey * |
1da177e4 LT |
779 | exp_find_key(svc_client *clp, int fsid_type, u32 *fsidv, struct cache_req *reqp) |
780 | { | |
781 | struct svc_expkey key, *ek; | |
782 | int err; | |
783 | ||
784 | if (!clp) | |
2d3bb252 | 785 | return ERR_PTR(-ENOENT); |
1da177e4 LT |
786 | |
787 | key.ek_client = clp; | |
788 | key.ek_fsidtype = fsid_type; | |
789 | memcpy(key.ek_fsid, fsidv, key_len(fsid_type)); | |
790 | ||
8d270f7f | 791 | ek = svc_expkey_lookup(&key); |
2d3bb252 BF |
792 | if (ek == NULL) |
793 | return ERR_PTR(-ENOMEM); | |
794 | err = cache_check(&svc_expkey_cache, &ek->h, reqp); | |
795 | if (err) | |
796 | return ERR_PTR(err); | |
1da177e4 LT |
797 | return ek; |
798 | } | |
799 | ||
1e140567 | 800 | #ifdef CONFIG_NFSD_DEPRECATED |
1da177e4 LT |
801 | static int exp_set_key(svc_client *clp, int fsid_type, u32 *fsidv, |
802 | struct svc_export *exp) | |
803 | { | |
804 | struct svc_expkey key, *ek; | |
805 | ||
806 | key.ek_client = clp; | |
807 | key.ek_fsidtype = fsid_type; | |
808 | memcpy(key.ek_fsid, fsidv, key_len(fsid_type)); | |
e83aece3 | 809 | key.ek_path = exp->ex_path; |
1da177e4 LT |
810 | key.h.expiry_time = NEVER; |
811 | key.h.flags = 0; | |
812 | ||
8d270f7f N |
813 | ek = svc_expkey_lookup(&key); |
814 | if (ek) | |
815 | ek = svc_expkey_update(&key,ek); | |
1da177e4 | 816 | if (ek) { |
baab935f | 817 | cache_put(&ek->h, &svc_expkey_cache); |
1da177e4 LT |
818 | return 0; |
819 | } | |
820 | return -ENOMEM; | |
821 | } | |
822 | ||
823 | /* | |
824 | * Find the client's export entry matching xdev/xino. | |
825 | */ | |
826 | static inline struct svc_expkey * | |
827 | exp_get_key(svc_client *clp, dev_t dev, ino_t ino) | |
828 | { | |
829 | u32 fsidv[3]; | |
830 | ||
831 | if (old_valid_dev(dev)) { | |
af6a4e28 N |
832 | mk_fsid(FSID_DEV, fsidv, dev, ino, 0, NULL); |
833 | return exp_find_key(clp, FSID_DEV, fsidv, NULL); | |
1da177e4 | 834 | } |
af6a4e28 N |
835 | mk_fsid(FSID_ENCODE_DEV, fsidv, dev, ino, 0, NULL); |
836 | return exp_find_key(clp, FSID_ENCODE_DEV, fsidv, NULL); | |
1da177e4 LT |
837 | } |
838 | ||
839 | /* | |
840 | * Find the client's export entry matching fsid | |
841 | */ | |
842 | static inline struct svc_expkey * | |
843 | exp_get_fsid_key(svc_client *clp, int fsid) | |
844 | { | |
845 | u32 fsidv[2]; | |
846 | ||
af6a4e28 | 847 | mk_fsid(FSID_NUM, fsidv, 0, 0, fsid, NULL); |
1da177e4 | 848 | |
af6a4e28 | 849 | return exp_find_key(clp, FSID_NUM, fsidv, NULL); |
1da177e4 | 850 | } |
1e140567 | 851 | #endif |
1da177e4 | 852 | |
55430e2e AV |
853 | static svc_export *exp_get_by_name(svc_client *clp, const struct path *path, |
854 | struct cache_req *reqp) | |
1da177e4 LT |
855 | { |
856 | struct svc_export *exp, key; | |
2d3bb252 | 857 | int err; |
e83aece3 | 858 | |
1da177e4 | 859 | if (!clp) |
2d3bb252 | 860 | return ERR_PTR(-ENOENT); |
1da177e4 LT |
861 | |
862 | key.ex_client = clp; | |
55430e2e | 863 | key.ex_path = *path; |
1da177e4 | 864 | |
4f7774c3 | 865 | exp = svc_export_lookup(&key); |
2d3bb252 BF |
866 | if (exp == NULL) |
867 | return ERR_PTR(-ENOMEM); | |
868 | err = cache_check(&svc_export_cache, &exp->h, reqp); | |
869 | if (err) | |
870 | return ERR_PTR(err); | |
1da177e4 LT |
871 | return exp; |
872 | } | |
873 | ||
874 | /* | |
875 | * Find the export entry for a given dentry. | |
876 | */ | |
5bf3bd2b | 877 | static struct svc_export *exp_parent(svc_client *clp, struct path *path) |
1da177e4 | 878 | { |
5bf3bd2b AV |
879 | struct dentry *saved = dget(path->dentry); |
880 | svc_export *exp = exp_get_by_name(clp, path, NULL); | |
881 | ||
882 | while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(path->dentry)) { | |
883 | struct dentry *parent = dget_parent(path->dentry); | |
884 | dput(path->dentry); | |
885 | path->dentry = parent; | |
886 | exp = exp_get_by_name(clp, path, NULL); | |
1da177e4 | 887 | } |
5bf3bd2b AV |
888 | dput(path->dentry); |
889 | path->dentry = saved; | |
1da177e4 LT |
890 | return exp; |
891 | } | |
892 | ||
1e140567 | 893 | #ifdef CONFIG_NFSD_DEPRECATED |
1da177e4 LT |
894 | /* |
895 | * Hashtable locking. Write locks are placed only by user processes | |
896 | * wanting to modify export information. | |
897 | * Write locking only done in this file. Read locking | |
898 | * needed externally. | |
899 | */ | |
900 | ||
901 | static DECLARE_RWSEM(hash_sem); | |
902 | ||
903 | void | |
904 | exp_readlock(void) | |
905 | { | |
906 | down_read(&hash_sem); | |
907 | } | |
908 | ||
909 | static inline void | |
910 | exp_writelock(void) | |
911 | { | |
912 | down_write(&hash_sem); | |
913 | } | |
914 | ||
915 | void | |
916 | exp_readunlock(void) | |
917 | { | |
918 | up_read(&hash_sem); | |
919 | } | |
920 | ||
921 | static inline void | |
922 | exp_writeunlock(void) | |
923 | { | |
924 | up_write(&hash_sem); | |
925 | } | |
1e140567 N |
926 | #else |
927 | ||
928 | /* hash_sem not needed once deprecated interface is removed */ | |
929 | void exp_readlock(void) {} | |
930 | static inline void exp_writelock(void){} | |
931 | void exp_readunlock(void) {} | |
932 | static inline void exp_writeunlock(void){} | |
933 | ||
934 | #endif | |
935 | ||
936 | #ifdef CONFIG_NFSD_DEPRECATED | |
937 | static void exp_do_unexport(svc_export *unexp); | |
938 | static int exp_verify_string(char *cp, int max); | |
1da177e4 LT |
939 | |
940 | static void exp_fsid_unhash(struct svc_export *exp) | |
941 | { | |
942 | struct svc_expkey *ek; | |
943 | ||
944 | if ((exp->ex_flags & NFSEXP_FSID) == 0) | |
945 | return; | |
946 | ||
947 | ek = exp_get_fsid_key(exp->ex_client, exp->ex_fsid); | |
2d3bb252 | 948 | if (!IS_ERR(ek)) { |
17cebf65 | 949 | sunrpc_invalidate(&ek->h, &svc_expkey_cache); |
baab935f | 950 | cache_put(&ek->h, &svc_expkey_cache); |
1da177e4 | 951 | } |
1da177e4 LT |
952 | } |
953 | ||
954 | static int exp_fsid_hash(svc_client *clp, struct svc_export *exp) | |
955 | { | |
956 | u32 fsid[2]; | |
957 | ||
958 | if ((exp->ex_flags & NFSEXP_FSID) == 0) | |
959 | return 0; | |
960 | ||
af6a4e28 N |
961 | mk_fsid(FSID_NUM, fsid, 0, 0, exp->ex_fsid, NULL); |
962 | return exp_set_key(clp, FSID_NUM, fsid, exp); | |
1da177e4 LT |
963 | } |
964 | ||
965 | static int exp_hash(struct auth_domain *clp, struct svc_export *exp) | |
966 | { | |
967 | u32 fsid[2]; | |
54775491 | 968 | struct inode *inode = exp->ex_path.dentry->d_inode; |
1da177e4 LT |
969 | dev_t dev = inode->i_sb->s_dev; |
970 | ||
971 | if (old_valid_dev(dev)) { | |
af6a4e28 N |
972 | mk_fsid(FSID_DEV, fsid, dev, inode->i_ino, 0, NULL); |
973 | return exp_set_key(clp, FSID_DEV, fsid, exp); | |
1da177e4 | 974 | } |
af6a4e28 N |
975 | mk_fsid(FSID_ENCODE_DEV, fsid, dev, inode->i_ino, 0, NULL); |
976 | return exp_set_key(clp, FSID_ENCODE_DEV, fsid, exp); | |
1da177e4 LT |
977 | } |
978 | ||
979 | static void exp_unhash(struct svc_export *exp) | |
980 | { | |
981 | struct svc_expkey *ek; | |
54775491 | 982 | struct inode *inode = exp->ex_path.dentry->d_inode; |
1da177e4 LT |
983 | |
984 | ek = exp_get_key(exp->ex_client, inode->i_sb->s_dev, inode->i_ino); | |
2d3bb252 | 985 | if (!IS_ERR(ek)) { |
17cebf65 | 986 | sunrpc_invalidate(&ek->h, &svc_expkey_cache); |
baab935f | 987 | cache_put(&ek->h, &svc_expkey_cache); |
1da177e4 | 988 | } |
1da177e4 LT |
989 | } |
990 | ||
991 | /* | |
992 | * Export a file system. | |
993 | */ | |
994 | int | |
995 | exp_export(struct nfsctl_export *nxp) | |
996 | { | |
997 | svc_client *clp; | |
998 | struct svc_export *exp = NULL; | |
999 | struct svc_export new; | |
1000 | struct svc_expkey *fsid_key = NULL; | |
a63bb996 | 1001 | struct path path; |
1da177e4 LT |
1002 | int err; |
1003 | ||
1004 | /* Consistency check */ | |
1005 | err = -EINVAL; | |
1006 | if (!exp_verify_string(nxp->ex_path, NFS_MAXPATHLEN) || | |
1007 | !exp_verify_string(nxp->ex_client, NFSCLNT_IDMAX)) | |
1008 | goto out; | |
1009 | ||
1010 | dprintk("exp_export called for %s:%s (%x/%ld fl %x).\n", | |
1011 | nxp->ex_client, nxp->ex_path, | |
1012 | (unsigned)nxp->ex_dev, (long)nxp->ex_ino, | |
1013 | nxp->ex_flags); | |
1014 | ||
1015 | /* Try to lock the export table for update */ | |
1016 | exp_writelock(); | |
1017 | ||
1018 | /* Look up client info */ | |
1019 | if (!(clp = auth_domain_find(nxp->ex_client))) | |
1020 | goto out_unlock; | |
1021 | ||
1022 | ||
1023 | /* Look up the dentry */ | |
a63bb996 | 1024 | err = kern_path(nxp->ex_path, 0, &path); |
1da177e4 | 1025 | if (err) |
53e6d8d1 | 1026 | goto out_put_clp; |
1da177e4 LT |
1027 | err = -EINVAL; |
1028 | ||
55430e2e | 1029 | exp = exp_get_by_name(clp, &path, NULL); |
1da177e4 | 1030 | |
f988443a N |
1031 | memset(&new, 0, sizeof(new)); |
1032 | ||
1da177e4 LT |
1033 | /* must make sure there won't be an ex_fsid clash */ |
1034 | if ((nxp->ex_flags & NFSEXP_FSID) && | |
2d3bb252 | 1035 | (!IS_ERR(fsid_key = exp_get_fsid_key(clp, nxp->ex_dev))) && |
e83aece3 | 1036 | fsid_key->ek_path.mnt && |
a63bb996 AV |
1037 | (fsid_key->ek_path.mnt != path.mnt || |
1038 | fsid_key->ek_path.dentry != path.dentry)) | |
1da177e4 LT |
1039 | goto finish; |
1040 | ||
2d3bb252 | 1041 | if (!IS_ERR(exp)) { |
1da177e4 LT |
1042 | /* just a flags/id/fsid update */ |
1043 | ||
1044 | exp_fsid_unhash(exp); | |
1045 | exp->ex_flags = nxp->ex_flags; | |
1046 | exp->ex_anon_uid = nxp->ex_anon_uid; | |
1047 | exp->ex_anon_gid = nxp->ex_anon_gid; | |
1048 | exp->ex_fsid = nxp->ex_dev; | |
1049 | ||
1050 | err = exp_fsid_hash(clp, exp); | |
1051 | goto finish; | |
1052 | } | |
1053 | ||
774b1478 | 1054 | err = check_export(path.dentry->d_inode, &nxp->ex_flags, NULL); |
1da177e4 LT |
1055 | if (err) goto finish; |
1056 | ||
1057 | err = -ENOMEM; | |
1058 | ||
1059 | dprintk("nfsd: creating export entry %p for client %p\n", exp, clp); | |
1060 | ||
1061 | new.h.expiry_time = NEVER; | |
1062 | new.h.flags = 0; | |
54775491 JB |
1063 | new.ex_pathname = kstrdup(nxp->ex_path, GFP_KERNEL); |
1064 | if (!new.ex_pathname) | |
f988443a | 1065 | goto finish; |
1da177e4 | 1066 | new.ex_client = clp; |
a63bb996 | 1067 | new.ex_path = path; |
1da177e4 LT |
1068 | new.ex_flags = nxp->ex_flags; |
1069 | new.ex_anon_uid = nxp->ex_anon_uid; | |
1070 | new.ex_anon_gid = nxp->ex_anon_gid; | |
1071 | new.ex_fsid = nxp->ex_dev; | |
1072 | ||
4f7774c3 N |
1073 | exp = svc_export_lookup(&new); |
1074 | if (exp) | |
1075 | exp = svc_export_update(&new, exp); | |
1da177e4 | 1076 | |
4f7774c3 | 1077 | if (!exp) |
1da177e4 LT |
1078 | goto finish; |
1079 | ||
1da177e4 LT |
1080 | if (exp_hash(clp, exp) || |
1081 | exp_fsid_hash(clp, exp)) { | |
1082 | /* failed to create at least one index */ | |
1083 | exp_do_unexport(exp); | |
1084 | cache_flush(); | |
f988443a N |
1085 | } else |
1086 | err = 0; | |
1da177e4 | 1087 | finish: |
54775491 | 1088 | kfree(new.ex_pathname); |
d03859a4 | 1089 | if (!IS_ERR_OR_NULL(exp)) |
1da177e4 | 1090 | exp_put(exp); |
d03859a4 | 1091 | if (!IS_ERR_OR_NULL(fsid_key)) |
baab935f | 1092 | cache_put(&fsid_key->h, &svc_expkey_cache); |
a63bb996 | 1093 | path_put(&path); |
53e6d8d1 JL |
1094 | out_put_clp: |
1095 | auth_domain_put(clp); | |
1da177e4 LT |
1096 | out_unlock: |
1097 | exp_writeunlock(); | |
1098 | out: | |
1099 | return err; | |
1100 | } | |
1101 | ||
1102 | /* | |
1103 | * Unexport a file system. The export entry has already | |
1104 | * been removed from the client's list of exported fs's. | |
1105 | */ | |
1106 | static void | |
1107 | exp_do_unexport(svc_export *unexp) | |
1108 | { | |
17cebf65 | 1109 | sunrpc_invalidate(&unexp->h, &svc_export_cache); |
1da177e4 LT |
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; | |
a63bb996 | 1123 | struct path path; |
1da177e4 LT |
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 | ||
a63bb996 | 1140 | err = kern_path(nxp->ex_path, 0, &path); |
1da177e4 LT |
1141 | if (err) |
1142 | goto out_domain; | |
1143 | ||
1144 | err = -EINVAL; | |
55430e2e | 1145 | exp = exp_get_by_name(dom, &path, NULL); |
a63bb996 | 1146 | path_put(&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 | } | |
1e140567 | 1161 | #endif /* CONFIG_NFSD_DEPRECATED */ |
1da177e4 LT |
1162 | |
1163 | /* | |
1164 | * Obtain the root fh on behalf of a client. | |
1165 | * This could be done in user space, but I feel that it adds some safety | |
1166 | * since its harder to fool a kernel module than a user space program. | |
1167 | */ | |
1168 | int | |
a63bb996 | 1169 | exp_rootfh(svc_client *clp, char *name, struct knfsd_fh *f, int maxsize) |
1da177e4 LT |
1170 | { |
1171 | struct svc_export *exp; | |
a63bb996 | 1172 | struct path path; |
1da177e4 LT |
1173 | struct inode *inode; |
1174 | struct svc_fh fh; | |
1175 | int err; | |
1176 | ||
1177 | err = -EPERM; | |
1178 | /* NB: we probably ought to check that it's NUL-terminated */ | |
a63bb996 AV |
1179 | if (kern_path(name, 0, &path)) { |
1180 | printk("nfsd: exp_rootfh path not found %s", name); | |
1da177e4 LT |
1181 | return err; |
1182 | } | |
a63bb996 | 1183 | inode = path.dentry->d_inode; |
1da177e4 LT |
1184 | |
1185 | dprintk("nfsd: exp_rootfh(%s [%p] %s:%s/%ld)\n", | |
a63bb996 | 1186 | name, path.dentry, clp->name, |
1da177e4 | 1187 | inode->i_sb->s_id, inode->i_ino); |
5bf3bd2b | 1188 | exp = exp_parent(clp, &path); |
4b41bd85 BF |
1189 | if (IS_ERR(exp)) { |
1190 | err = PTR_ERR(exp); | |
1191 | goto out; | |
1192 | } | |
1da177e4 LT |
1193 | |
1194 | /* | |
1195 | * fh must be initialized before calling fh_compose | |
1196 | */ | |
1197 | fh_init(&fh, maxsize); | |
a63bb996 | 1198 | if (fh_compose(&fh, exp, path.dentry, NULL)) |
1da177e4 LT |
1199 | err = -EINVAL; |
1200 | else | |
1201 | err = 0; | |
1202 | memcpy(f, &fh.fh_handle, sizeof(struct knfsd_fh)); | |
1203 | fh_put(&fh); | |
1204 | exp_put(exp); | |
1205 | out: | |
a63bb996 | 1206 | path_put(&path); |
1da177e4 LT |
1207 | return err; |
1208 | } | |
1209 | ||
cce76f9b AB |
1210 | static struct svc_export *exp_find(struct auth_domain *clp, int fsid_type, |
1211 | u32 *fsidv, struct cache_req *reqp) | |
eab7e2e6 N |
1212 | { |
1213 | struct svc_export *exp; | |
1214 | struct svc_expkey *ek = exp_find_key(clp, fsid_type, fsidv, reqp); | |
2d3bb252 | 1215 | if (IS_ERR(ek)) |
e231c2ee | 1216 | return ERR_CAST(ek); |
eab7e2e6 | 1217 | |
55430e2e | 1218 | exp = exp_get_by_name(clp, &ek->ek_path, reqp); |
baab935f | 1219 | cache_put(&ek->h, &svc_expkey_cache); |
eab7e2e6 | 1220 | |
2d3bb252 | 1221 | if (IS_ERR(exp)) |
e231c2ee | 1222 | return ERR_CAST(exp); |
eab7e2e6 N |
1223 | return exp; |
1224 | } | |
1225 | ||
32c1eb0c AA |
1226 | __be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp) |
1227 | { | |
1228 | struct exp_flavor_info *f; | |
1229 | struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors; | |
1230 | ||
1231 | /* legacy gss-only clients are always OK: */ | |
1232 | if (exp->ex_client == rqstp->rq_gssclient) | |
1233 | return 0; | |
1234 | /* ip-address based client; check sec= export option: */ | |
1235 | for (f = exp->ex_flavors; f < end; f++) { | |
1236 | if (f->pseudoflavor == rqstp->rq_flavor) | |
1237 | return 0; | |
1238 | } | |
1239 | /* defaults in absence of sec= options: */ | |
1240 | if (exp->ex_nflavors == 0) { | |
1241 | if (rqstp->rq_flavor == RPC_AUTH_NULL || | |
1242 | rqstp->rq_flavor == RPC_AUTH_UNIX) | |
1243 | return 0; | |
1244 | } | |
1245 | return nfserr_wrongsec; | |
1246 | } | |
1247 | ||
0989a788 | 1248 | /* |
2ea2209f BF |
1249 | * Uses rq_client and rq_gssclient to find an export; uses rq_client (an |
1250 | * auth_unix client) if it's available and has secinfo information; | |
1251 | * otherwise, will try to use rq_gssclient. | |
1252 | * | |
0989a788 BF |
1253 | * Called from functions that handle requests; functions that do work on |
1254 | * behalf of mountd are passed a single client name to use, and should | |
1255 | * use exp_get_by_name() or exp_find(). | |
1256 | */ | |
1257 | struct svc_export * | |
91c9fa8f | 1258 | rqst_exp_get_by_name(struct svc_rqst *rqstp, struct path *path) |
0989a788 | 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 | 1265 | /* First try the auth_unix client: */ |
91c9fa8f | 1266 | exp = exp_get_by_name(rqstp->rq_client, path, &rqstp->rq_chandle); |
2ea2209f BF |
1267 | if (PTR_ERR(exp) == -ENOENT) |
1268 | goto gss; | |
1269 | if (IS_ERR(exp)) | |
1270 | return exp; | |
1271 | /* If it has secinfo, assume there are no gss/... clients */ | |
1272 | if (exp->ex_nflavors > 0) | |
1273 | return exp; | |
1274 | gss: | |
1275 | /* Otherwise, try falling back on gss client */ | |
1276 | if (rqstp->rq_gssclient == NULL) | |
1277 | return exp; | |
91c9fa8f | 1278 | gssexp = exp_get_by_name(rqstp->rq_gssclient, path, &rqstp->rq_chandle); |
2ea2209f BF |
1279 | if (PTR_ERR(gssexp) == -ENOENT) |
1280 | return exp; | |
9a25b96c | 1281 | if (!IS_ERR(exp)) |
2ea2209f BF |
1282 | exp_put(exp); |
1283 | return gssexp; | |
0989a788 BF |
1284 | } |
1285 | ||
1286 | struct svc_export * | |
1287 | rqst_exp_find(struct svc_rqst *rqstp, int fsid_type, u32 *fsidv) | |
1288 | { | |
9a25b96c | 1289 | struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT); |
2ea2209f BF |
1290 | |
1291 | if (rqstp->rq_client == NULL) | |
1292 | goto gss; | |
3ab4d8b1 | 1293 | |
2ea2209f BF |
1294 | /* First try the auth_unix client: */ |
1295 | exp = exp_find(rqstp->rq_client, fsid_type, fsidv, &rqstp->rq_chandle); | |
1296 | if (PTR_ERR(exp) == -ENOENT) | |
1297 | goto gss; | |
1298 | if (IS_ERR(exp)) | |
1299 | return exp; | |
1300 | /* If it has secinfo, assume there are no gss/... clients */ | |
1301 | if (exp->ex_nflavors > 0) | |
1302 | return exp; | |
1303 | gss: | |
1304 | /* Otherwise, try falling back on gss client */ | |
1305 | if (rqstp->rq_gssclient == NULL) | |
1306 | return exp; | |
1307 | gssexp = exp_find(rqstp->rq_gssclient, fsid_type, fsidv, | |
1308 | &rqstp->rq_chandle); | |
1309 | if (PTR_ERR(gssexp) == -ENOENT) | |
1310 | return exp; | |
9a25b96c | 1311 | if (!IS_ERR(exp)) |
2ea2209f BF |
1312 | exp_put(exp); |
1313 | return gssexp; | |
0989a788 BF |
1314 | } |
1315 | ||
1316 | struct svc_export * | |
e64c390c | 1317 | rqst_exp_parent(struct svc_rqst *rqstp, struct path *path) |
0989a788 | 1318 | { |
e64c390c AV |
1319 | struct dentry *saved = dget(path->dentry); |
1320 | struct svc_export *exp = rqst_exp_get_by_name(rqstp, path); | |
2ea2209f | 1321 | |
e64c390c AV |
1322 | while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(path->dentry)) { |
1323 | struct dentry *parent = dget_parent(path->dentry); | |
1324 | dput(path->dentry); | |
1325 | path->dentry = parent; | |
1326 | exp = rqst_exp_get_by_name(rqstp, path); | |
2ea2209f | 1327 | } |
e64c390c AV |
1328 | dput(path->dentry); |
1329 | path->dentry = saved; | |
2ea2209f | 1330 | return exp; |
0989a788 | 1331 | } |
eab7e2e6 | 1332 | |
f39bde24 BF |
1333 | static struct svc_export *find_fsidzero_export(struct svc_rqst *rqstp) |
1334 | { | |
f39bde24 BF |
1335 | u32 fsidv[2]; |
1336 | ||
1337 | mk_fsid(FSID_NUM, fsidv, 0, 0, 0, NULL); | |
1338 | ||
260c64d2 | 1339 | return rqst_exp_find(rqstp, FSID_NUM, fsidv); |
f39bde24 BF |
1340 | } |
1341 | ||
1da177e4 LT |
1342 | /* |
1343 | * Called when we need the filehandle for the root of the pseudofs, | |
1344 | * for a given NFSv4 client. The root is defined to be the | |
1345 | * export point with fsid==0 | |
1346 | */ | |
c7afef1f | 1347 | __be32 |
df547efb | 1348 | exp_pseudoroot(struct svc_rqst *rqstp, struct svc_fh *fhp) |
1da177e4 | 1349 | { |
eab7e2e6 | 1350 | struct svc_export *exp; |
c7afef1f | 1351 | __be32 rv; |
1da177e4 | 1352 | |
f39bde24 | 1353 | exp = find_fsidzero_export(rqstp); |
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); | |
2671a4bf TM |
1360 | if (rv) |
1361 | fh_put(fhp); | |
32c1eb0c | 1362 | out: |
d0ebd9c0 | 1363 | exp_put(exp); |
1da177e4 LT |
1364 | return rv; |
1365 | } | |
1366 | ||
1367 | /* Iterator */ | |
1368 | ||
1369 | static void *e_start(struct seq_file *m, loff_t *pos) | |
896440d5 | 1370 | __acquires(svc_export_cache.hash_lock) |
1da177e4 LT |
1371 | { |
1372 | loff_t n = *pos; | |
1373 | unsigned hash, export; | |
1374 | struct cache_head *ch; | |
1375 | ||
1376 | exp_readlock(); | |
1377 | read_lock(&svc_export_cache.hash_lock); | |
1378 | if (!n--) | |
bc6f02e5 | 1379 | return SEQ_START_TOKEN; |
1da177e4 LT |
1380 | hash = n >> 32; |
1381 | export = n & ((1LL<<32) - 1); | |
1382 | ||
1383 | ||
1384 | for (ch=export_table[hash]; ch; ch=ch->next) | |
1385 | if (!export--) | |
1386 | return ch; | |
1387 | n &= ~((1LL<<32) - 1); | |
1388 | do { | |
1389 | hash++; | |
1390 | n += 1LL<<32; | |
1391 | } while(hash < EXPORT_HASHMAX && export_table[hash]==NULL); | |
1392 | if (hash >= EXPORT_HASHMAX) | |
1393 | return NULL; | |
1394 | *pos = n+1; | |
1395 | return export_table[hash]; | |
1396 | } | |
1397 | ||
1398 | static void *e_next(struct seq_file *m, void *p, loff_t *pos) | |
1399 | { | |
1400 | struct cache_head *ch = p; | |
1401 | int hash = (*pos >> 32); | |
1402 | ||
bc6f02e5 | 1403 | if (p == SEQ_START_TOKEN) |
1da177e4 LT |
1404 | hash = 0; |
1405 | else if (ch->next == NULL) { | |
1406 | hash++; | |
1407 | *pos += 1LL<<32; | |
1408 | } else { | |
1409 | ++*pos; | |
1410 | return ch->next; | |
1411 | } | |
1412 | *pos &= ~((1LL<<32) - 1); | |
1413 | while (hash < EXPORT_HASHMAX && export_table[hash] == NULL) { | |
1414 | hash++; | |
1415 | *pos += 1LL<<32; | |
1416 | } | |
1417 | if (hash >= EXPORT_HASHMAX) | |
1418 | return NULL; | |
1419 | ++*pos; | |
1420 | return export_table[hash]; | |
1421 | } | |
1422 | ||
1423 | static void e_stop(struct seq_file *m, void *p) | |
896440d5 | 1424 | __releases(svc_export_cache.hash_lock) |
1da177e4 LT |
1425 | { |
1426 | read_unlock(&svc_export_cache.hash_lock); | |
1427 | exp_readunlock(); | |
1428 | } | |
1429 | ||
1430 | static struct flags { | |
1431 | int flag; | |
1432 | char *name[2]; | |
1433 | } expflags[] = { | |
1434 | { NFSEXP_READONLY, {"ro", "rw"}}, | |
1435 | { NFSEXP_INSECURE_PORT, {"insecure", ""}}, | |
1436 | { NFSEXP_ROOTSQUASH, {"root_squash", "no_root_squash"}}, | |
1437 | { NFSEXP_ALLSQUASH, {"all_squash", ""}}, | |
1438 | { NFSEXP_ASYNC, {"async", "sync"}}, | |
1439 | { NFSEXP_GATHERED_WRITES, {"wdelay", "no_wdelay"}}, | |
1440 | { NFSEXP_NOHIDE, {"nohide", ""}}, | |
1441 | { NFSEXP_CROSSMOUNT, {"crossmnt", ""}}, | |
1442 | { NFSEXP_NOSUBTREECHECK, {"no_subtree_check", ""}}, | |
1443 | { NFSEXP_NOAUTHNLM, {"insecure_locks", ""}}, | |
eb4c86c6 | 1444 | { NFSEXP_V4ROOT, {"v4root", ""}}, |
1da177e4 LT |
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 | ||
74ec1e12 BF |
1468 | static bool secinfo_flags_equal(int f, int g) |
1469 | { | |
1470 | f &= NFSEXP_SECINFO_FLAGS; | |
1471 | g &= NFSEXP_SECINFO_FLAGS; | |
1472 | return f == g; | |
1473 | } | |
1474 | ||
1475 | static int show_secinfo_run(struct seq_file *m, struct exp_flavor_info **fp, struct exp_flavor_info *end) | |
1476 | { | |
1477 | int flags; | |
1478 | ||
1479 | flags = (*fp)->flags; | |
1480 | seq_printf(m, ",sec=%d", (*fp)->pseudoflavor); | |
1481 | (*fp)++; | |
1482 | while (*fp != end && secinfo_flags_equal(flags, (*fp)->flags)) { | |
1483 | seq_printf(m, ":%d", (*fp)->pseudoflavor); | |
1484 | (*fp)++; | |
1485 | } | |
1486 | return flags; | |
1487 | } | |
1488 | ||
91fe39d3 BF |
1489 | static void show_secinfo(struct seq_file *m, struct svc_export *exp) |
1490 | { | |
1491 | struct exp_flavor_info *f; | |
1492 | struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors; | |
74ec1e12 | 1493 | int flags; |
91fe39d3 BF |
1494 | |
1495 | if (exp->ex_nflavors == 0) | |
1496 | return; | |
74ec1e12 BF |
1497 | f = exp->ex_flavors; |
1498 | flags = show_secinfo_run(m, &f, end); | |
1499 | if (!secinfo_flags_equal(flags, exp->ex_flags)) | |
1500 | show_secinfo_flags(m, flags); | |
1501 | while (f != end) { | |
1502 | flags = show_secinfo_run(m, &f, end); | |
1503 | show_secinfo_flags(m, flags); | |
91fe39d3 | 1504 | } |
91fe39d3 BF |
1505 | } |
1506 | ||
ac34cdb0 BF |
1507 | static void exp_flags(struct seq_file *m, int flag, int fsid, |
1508 | uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fsloc) | |
1509 | { | |
1510 | show_expflags(m, flag, NFSEXP_ALLFLAGS); | |
1da177e4 | 1511 | if (flag & NFSEXP_FSID) |
ac34cdb0 | 1512 | seq_printf(m, ",fsid=%d", fsid); |
1da177e4 | 1513 | if (anonu != (uid_t)-2 && anonu != (0x10000-2)) |
3e63516c | 1514 | seq_printf(m, ",anonuid=%u", anonu); |
1da177e4 | 1515 | if (anong != (gid_t)-2 && anong != (0x10000-2)) |
3e63516c | 1516 | seq_printf(m, ",anongid=%u", anong); |
93346919 MN |
1517 | if (fsloc && fsloc->locations_count > 0) { |
1518 | char *loctype = (fsloc->migrated) ? "refer" : "replicas"; | |
1519 | int i; | |
1520 | ||
ac34cdb0 | 1521 | seq_printf(m, ",%s=", loctype); |
93346919 MN |
1522 | seq_escape(m, fsloc->locations[0].path, ",;@ \t\n\\"); |
1523 | seq_putc(m, '@'); | |
1524 | seq_escape(m, fsloc->locations[0].hosts, ",;@ \t\n\\"); | |
1525 | for (i = 1; i < fsloc->locations_count; i++) { | |
1526 | seq_putc(m, ';'); | |
1527 | seq_escape(m, fsloc->locations[i].path, ",;@ \t\n\\"); | |
1528 | seq_putc(m, '@'); | |
1529 | seq_escape(m, fsloc->locations[i].hosts, ",;@ \t\n\\"); | |
1530 | } | |
1531 | } | |
1da177e4 LT |
1532 | } |
1533 | ||
1534 | static int e_show(struct seq_file *m, void *p) | |
1535 | { | |
1536 | struct cache_head *cp = p; | |
1537 | struct svc_export *exp = container_of(cp, struct svc_export, h); | |
1da177e4 | 1538 | |
bc6f02e5 | 1539 | if (p == SEQ_START_TOKEN) { |
1da177e4 LT |
1540 | seq_puts(m, "# Version 1.1\n"); |
1541 | seq_puts(m, "# Path Client(Flags) # IPs\n"); | |
1542 | return 0; | |
1543 | } | |
1544 | ||
1da177e4 LT |
1545 | cache_get(&exp->h); |
1546 | if (cache_check(&svc_export_cache, &exp->h, NULL)) | |
1547 | return 0; | |
baab935f | 1548 | cache_put(&exp->h, &svc_export_cache); |
1da177e4 LT |
1549 | return svc_export_show(m, &svc_export_cache, cp); |
1550 | } | |
1551 | ||
88e9d34c | 1552 | const struct seq_operations nfs_exports_op = { |
1da177e4 LT |
1553 | .start = e_start, |
1554 | .next = e_next, | |
1555 | .stop = e_stop, | |
1556 | .show = e_show, | |
1557 | }; | |
1558 | ||
1e140567 | 1559 | #ifdef CONFIG_NFSD_DEPRECATED |
1da177e4 LT |
1560 | /* |
1561 | * Add or modify a client. | |
1562 | * Change requests may involve the list of host addresses. The list of | |
1563 | * exports and possibly existing uid maps are left untouched. | |
1564 | */ | |
1565 | int | |
1566 | exp_addclient(struct nfsctl_client *ncp) | |
1567 | { | |
1568 | struct auth_domain *dom; | |
1569 | int i, err; | |
f15364bd | 1570 | struct in6_addr addr6; |
1da177e4 LT |
1571 | |
1572 | /* First, consistency check. */ | |
1573 | err = -EINVAL; | |
1574 | if (! exp_verify_string(ncp->cl_ident, NFSCLNT_IDMAX)) | |
1575 | goto out; | |
1576 | if (ncp->cl_naddr > NFSCLNT_ADDRMAX) | |
1577 | goto out; | |
1578 | ||
1579 | /* Lock the hashtable */ | |
1580 | exp_writelock(); | |
1581 | ||
1582 | dom = unix_domain_find(ncp->cl_ident); | |
1583 | ||
1584 | err = -ENOMEM; | |
1585 | if (!dom) | |
1586 | goto out_unlock; | |
1587 | ||
1588 | /* Insert client into hashtable. */ | |
f15364bd AC |
1589 | for (i = 0; i < ncp->cl_naddr; i++) { |
1590 | ipv6_addr_set_v4mapped(ncp->cl_addrlist[i].s_addr, &addr6); | |
352114f3 | 1591 | auth_unix_add_addr(&init_net, &addr6, dom); |
f15364bd | 1592 | } |
1da177e4 LT |
1593 | auth_unix_forget_old(dom); |
1594 | auth_domain_put(dom); | |
1595 | ||
1596 | err = 0; | |
1597 | ||
1598 | out_unlock: | |
1599 | exp_writeunlock(); | |
1600 | out: | |
1601 | return err; | |
1602 | } | |
1603 | ||
1604 | /* | |
1605 | * Delete a client given an identifier. | |
1606 | */ | |
1607 | int | |
1608 | exp_delclient(struct nfsctl_client *ncp) | |
1609 | { | |
1610 | int err; | |
1611 | struct auth_domain *dom; | |
1612 | ||
1613 | err = -EINVAL; | |
1614 | if (!exp_verify_string(ncp->cl_ident, NFSCLNT_IDMAX)) | |
1615 | goto out; | |
1616 | ||
1617 | /* Lock the hashtable */ | |
1618 | exp_writelock(); | |
1619 | ||
1620 | dom = auth_domain_find(ncp->cl_ident); | |
1621 | /* just make sure that no addresses work | |
1622 | * and that it will expire soon | |
1623 | */ | |
1624 | if (dom) { | |
1625 | err = auth_unix_forget_old(dom); | |
1da177e4 LT |
1626 | auth_domain_put(dom); |
1627 | } | |
1628 | ||
1629 | exp_writeunlock(); | |
1630 | out: | |
1631 | return err; | |
1632 | } | |
1633 | ||
1634 | /* | |
1635 | * Verify that string is non-empty and does not exceed max length. | |
1636 | */ | |
1637 | static int | |
1638 | exp_verify_string(char *cp, int max) | |
1639 | { | |
1640 | int i; | |
1641 | ||
1642 | for (i = 0; i < max; i++) | |
1643 | if (!cp[i]) | |
1644 | return i; | |
1645 | cp[i] = 0; | |
1646 | printk(KERN_NOTICE "nfsd: couldn't validate string %s\n", cp); | |
1647 | return 0; | |
1648 | } | |
1e140567 | 1649 | #endif /* CONFIG_NFSD_DEPRECATED */ |
1da177e4 LT |
1650 | |
1651 | /* | |
1652 | * Initialize the exports module. | |
1653 | */ | |
dbf847ec | 1654 | int |
1da177e4 LT |
1655 | nfsd_export_init(void) |
1656 | { | |
dbf847ec | 1657 | int rv; |
1da177e4 LT |
1658 | dprintk("nfsd: initializing export module.\n"); |
1659 | ||
dbf847ec BF |
1660 | rv = cache_register(&svc_export_cache); |
1661 | if (rv) | |
1662 | return rv; | |
1663 | rv = cache_register(&svc_expkey_cache); | |
1664 | if (rv) | |
1665 | cache_unregister(&svc_export_cache); | |
1666 | return rv; | |
1da177e4 LT |
1667 | |
1668 | } | |
1669 | ||
1670 | /* | |
1671 | * Flush exports table - called when last nfsd thread is killed | |
1672 | */ | |
1673 | void | |
1674 | nfsd_export_flush(void) | |
1675 | { | |
1676 | exp_writelock(); | |
1677 | cache_purge(&svc_expkey_cache); | |
1678 | cache_purge(&svc_export_cache); | |
1679 | exp_writeunlock(); | |
1680 | } | |
1681 | ||
1682 | /* | |
1683 | * Shutdown the exports module. | |
1684 | */ | |
1685 | void | |
1686 | nfsd_export_shutdown(void) | |
1687 | { | |
1688 | ||
1689 | dprintk("nfsd: shutting down export module.\n"); | |
1690 | ||
1691 | exp_writelock(); | |
1692 | ||
df95a9d4 BF |
1693 | cache_unregister(&svc_expkey_cache); |
1694 | cache_unregister(&svc_export_cache); | |
1da177e4 LT |
1695 | svcauth_unix_purge(); |
1696 | ||
1697 | exp_writeunlock(); | |
1698 | dprintk("nfsd: export shutdown complete.\n"); | |
1699 | } |