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Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Mapping of UID/GIDs to name and vice versa. |
3 | * | |
4 | * Copyright (c) 2002, 2003 The Regents of the University of | |
5 | * Michigan. All rights reserved. | |
6 | * | |
7 | * Marius Aamodt Eriksen <marius@umich.edu> | |
8 | * | |
9 | * Redistribution and use in source and binary forms, with or without | |
10 | * modification, are permitted provided that the following conditions | |
11 | * are met: | |
12 | * | |
13 | * 1. Redistributions of source code must retain the above copyright | |
14 | * notice, this list of conditions and the following disclaimer. | |
15 | * 2. Redistributions in binary form must reproduce the above copyright | |
16 | * notice, this list of conditions and the following disclaimer in the | |
17 | * documentation and/or other materials provided with the distribution. | |
18 | * 3. Neither the name of the University nor the names of its | |
19 | * contributors may be used to endorse or promote products derived | |
20 | * from this software without specific prior written permission. | |
21 | * | |
22 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
23 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
24 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
25 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
27 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
28 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
29 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
30 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
31 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
32 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
33 | */ | |
34 | ||
1da177e4 | 35 | #include <linux/module.h> |
1da177e4 | 36 | #include <linux/seq_file.h> |
341eb184 | 37 | #include <linux/sched.h> |
5a0e3ad6 | 38 | #include <linux/slab.h> |
2ca72e17 | 39 | #include "idmap.h" |
3c726023 | 40 | #include "nfsd.h" |
1da177e4 LT |
41 | |
42 | /* | |
43 | * Cache entry | |
44 | */ | |
45 | ||
46 | /* | |
47 | * XXX we know that IDMAP_NAMESZ < PAGE_SIZE, but it's ugly to rely on | |
48 | * that. | |
49 | */ | |
50 | ||
51 | #define IDMAP_TYPE_USER 0 | |
52 | #define IDMAP_TYPE_GROUP 1 | |
53 | ||
54 | struct ent { | |
55 | struct cache_head h; | |
56 | int type; /* User / Group */ | |
57 | uid_t id; | |
58 | char name[IDMAP_NAMESZ]; | |
59 | char authname[IDMAP_NAMESZ]; | |
60 | }; | |
61 | ||
1da177e4 LT |
62 | /* Common entry handling */ |
63 | ||
64 | #define ENT_HASHBITS 8 | |
65 | #define ENT_HASHMAX (1 << ENT_HASHBITS) | |
1da177e4 | 66 | |
f9ecc921 N |
67 | static void |
68 | ent_init(struct cache_head *cnew, struct cache_head *citm) | |
1da177e4 | 69 | { |
f9ecc921 N |
70 | struct ent *new = container_of(cnew, struct ent, h); |
71 | struct ent *itm = container_of(citm, struct ent, h); | |
72 | ||
1da177e4 LT |
73 | new->id = itm->id; |
74 | new->type = itm->type; | |
75 | ||
76 | strlcpy(new->name, itm->name, sizeof(new->name)); | |
77 | strlcpy(new->authname, itm->authname, sizeof(new->name)); | |
78 | } | |
79 | ||
fd39ca9a | 80 | static void |
baab935f | 81 | ent_put(struct kref *ref) |
1da177e4 | 82 | { |
baab935f N |
83 | struct ent *map = container_of(ref, struct ent, h.ref); |
84 | kfree(map); | |
1da177e4 LT |
85 | } |
86 | ||
f9ecc921 N |
87 | static struct cache_head * |
88 | ent_alloc(void) | |
89 | { | |
90 | struct ent *e = kmalloc(sizeof(*e), GFP_KERNEL); | |
91 | if (e) | |
92 | return &e->h; | |
93 | else | |
94 | return NULL; | |
95 | } | |
96 | ||
1da177e4 LT |
97 | /* |
98 | * ID -> Name cache | |
99 | */ | |
100 | ||
101 | static struct cache_head *idtoname_table[ENT_HASHMAX]; | |
102 | ||
103 | static uint32_t | |
104 | idtoname_hash(struct ent *ent) | |
105 | { | |
106 | uint32_t hash; | |
107 | ||
108 | hash = hash_str(ent->authname, ENT_HASHBITS); | |
109 | hash = hash_long(hash ^ ent->id, ENT_HASHBITS); | |
110 | ||
111 | /* Flip LSB for user/group */ | |
112 | if (ent->type == IDMAP_TYPE_GROUP) | |
113 | hash ^= 1; | |
114 | ||
115 | return hash; | |
116 | } | |
117 | ||
118 | static void | |
119 | idtoname_request(struct cache_detail *cd, struct cache_head *ch, char **bpp, | |
120 | int *blen) | |
121 | { | |
122 | struct ent *ent = container_of(ch, struct ent, h); | |
123 | char idstr[11]; | |
124 | ||
125 | qword_add(bpp, blen, ent->authname); | |
0a725fc4 | 126 | snprintf(idstr, sizeof(idstr), "%u", ent->id); |
1da177e4 LT |
127 | qword_add(bpp, blen, ent->type == IDMAP_TYPE_GROUP ? "group" : "user"); |
128 | qword_add(bpp, blen, idstr); | |
129 | ||
130 | (*bpp)[-1] = '\n'; | |
131 | } | |
132 | ||
bc74b4f5 TM |
133 | static int |
134 | idtoname_upcall(struct cache_detail *cd, struct cache_head *ch) | |
135 | { | |
136 | return sunrpc_cache_pipe_upcall(cd, ch, idtoname_request); | |
137 | } | |
138 | ||
f9ecc921 N |
139 | static int |
140 | idtoname_match(struct cache_head *ca, struct cache_head *cb) | |
1da177e4 | 141 | { |
f9ecc921 N |
142 | struct ent *a = container_of(ca, struct ent, h); |
143 | struct ent *b = container_of(cb, struct ent, h); | |
144 | ||
1da177e4 LT |
145 | return (a->id == b->id && a->type == b->type && |
146 | strcmp(a->authname, b->authname) == 0); | |
147 | } | |
148 | ||
149 | static int | |
150 | idtoname_show(struct seq_file *m, struct cache_detail *cd, struct cache_head *h) | |
151 | { | |
152 | struct ent *ent; | |
153 | ||
154 | if (h == NULL) { | |
155 | seq_puts(m, "#domain type id [name]\n"); | |
156 | return 0; | |
157 | } | |
158 | ent = container_of(h, struct ent, h); | |
0a725fc4 | 159 | seq_printf(m, "%s %s %u", ent->authname, |
1da177e4 LT |
160 | ent->type == IDMAP_TYPE_GROUP ? "group" : "user", |
161 | ent->id); | |
162 | if (test_bit(CACHE_VALID, &h->flags)) | |
163 | seq_printf(m, " %s", ent->name); | |
164 | seq_printf(m, "\n"); | |
165 | return 0; | |
166 | } | |
167 | ||
168 | static void | |
2da8ca26 | 169 | warn_no_idmapd(struct cache_detail *detail, int has_died) |
1da177e4 LT |
170 | { |
171 | printk("nfsd: nfsv4 idmapping failing: has idmapd %s?\n", | |
2da8ca26 | 172 | has_died ? "died" : "not been started"); |
1da177e4 LT |
173 | } |
174 | ||
175 | ||
176 | static int idtoname_parse(struct cache_detail *, char *, int); | |
f9ecc921 N |
177 | static struct ent *idtoname_lookup(struct ent *); |
178 | static struct ent *idtoname_update(struct ent *, struct ent *); | |
1da177e4 | 179 | |
fd39ca9a | 180 | static struct cache_detail idtoname_cache = { |
f35279d3 | 181 | .owner = THIS_MODULE, |
1da177e4 LT |
182 | .hash_size = ENT_HASHMAX, |
183 | .hash_table = idtoname_table, | |
184 | .name = "nfs4.idtoname", | |
185 | .cache_put = ent_put, | |
bc74b4f5 | 186 | .cache_upcall = idtoname_upcall, |
1da177e4 LT |
187 | .cache_parse = idtoname_parse, |
188 | .cache_show = idtoname_show, | |
189 | .warn_no_listener = warn_no_idmapd, | |
f9ecc921 N |
190 | .match = idtoname_match, |
191 | .init = ent_init, | |
192 | .update = ent_init, | |
193 | .alloc = ent_alloc, | |
1da177e4 LT |
194 | }; |
195 | ||
a254b246 | 196 | static int |
1da177e4 LT |
197 | idtoname_parse(struct cache_detail *cd, char *buf, int buflen) |
198 | { | |
199 | struct ent ent, *res; | |
200 | char *buf1, *bp; | |
c9b6cbe5 | 201 | int len; |
1da177e4 LT |
202 | int error = -EINVAL; |
203 | ||
204 | if (buf[buflen - 1] != '\n') | |
205 | return (-EINVAL); | |
206 | buf[buflen - 1]= '\0'; | |
207 | ||
208 | buf1 = kmalloc(PAGE_SIZE, GFP_KERNEL); | |
209 | if (buf1 == NULL) | |
210 | return (-ENOMEM); | |
211 | ||
212 | memset(&ent, 0, sizeof(ent)); | |
213 | ||
214 | /* Authentication name */ | |
215 | if (qword_get(&buf, buf1, PAGE_SIZE) <= 0) | |
216 | goto out; | |
217 | memcpy(ent.authname, buf1, sizeof(ent.authname)); | |
218 | ||
219 | /* Type */ | |
220 | if (qword_get(&buf, buf1, PAGE_SIZE) <= 0) | |
221 | goto out; | |
222 | ent.type = strcmp(buf1, "user") == 0 ? | |
223 | IDMAP_TYPE_USER : IDMAP_TYPE_GROUP; | |
224 | ||
225 | /* ID */ | |
226 | if (qword_get(&buf, buf1, PAGE_SIZE) <= 0) | |
227 | goto out; | |
228 | ent.id = simple_strtoul(buf1, &bp, 10); | |
229 | if (bp == buf1) | |
230 | goto out; | |
231 | ||
232 | /* expiry */ | |
233 | ent.h.expiry_time = get_expiry(&buf); | |
234 | if (ent.h.expiry_time == 0) | |
235 | goto out; | |
236 | ||
f9ecc921 N |
237 | error = -ENOMEM; |
238 | res = idtoname_lookup(&ent); | |
239 | if (!res) | |
240 | goto out; | |
241 | ||
1da177e4 | 242 | /* Name */ |
c9b6cbe5 BF |
243 | error = -EINVAL; |
244 | len = qword_get(&buf, buf1, PAGE_SIZE); | |
245 | if (len < 0) | |
1da177e4 | 246 | goto out; |
c9b6cbe5 | 247 | if (len == 0) |
1da177e4 | 248 | set_bit(CACHE_NEGATIVE, &ent.h.flags); |
d4395e03 BF |
249 | else if (len >= IDMAP_NAMESZ) |
250 | goto out; | |
251 | else | |
1da177e4 | 252 | memcpy(ent.name, buf1, sizeof(ent.name)); |
1da177e4 | 253 | error = -ENOMEM; |
f9ecc921 N |
254 | res = idtoname_update(&ent, res); |
255 | if (res == NULL) | |
1da177e4 LT |
256 | goto out; |
257 | ||
baab935f | 258 | cache_put(&res->h, &idtoname_cache); |
1da177e4 LT |
259 | |
260 | error = 0; | |
261 | out: | |
262 | kfree(buf1); | |
263 | ||
264 | return error; | |
265 | } | |
266 | ||
f9ecc921 N |
267 | |
268 | static struct ent * | |
269 | idtoname_lookup(struct ent *item) | |
270 | { | |
271 | struct cache_head *ch = sunrpc_cache_lookup(&idtoname_cache, | |
272 | &item->h, | |
273 | idtoname_hash(item)); | |
274 | if (ch) | |
275 | return container_of(ch, struct ent, h); | |
276 | else | |
277 | return NULL; | |
278 | } | |
279 | ||
280 | static struct ent * | |
281 | idtoname_update(struct ent *new, struct ent *old) | |
282 | { | |
283 | struct cache_head *ch = sunrpc_cache_update(&idtoname_cache, | |
284 | &new->h, &old->h, | |
285 | idtoname_hash(new)); | |
286 | if (ch) | |
287 | return container_of(ch, struct ent, h); | |
288 | else | |
289 | return NULL; | |
290 | } | |
291 | ||
1da177e4 LT |
292 | |
293 | /* | |
294 | * Name -> ID cache | |
295 | */ | |
296 | ||
297 | static struct cache_head *nametoid_table[ENT_HASHMAX]; | |
298 | ||
299 | static inline int | |
300 | nametoid_hash(struct ent *ent) | |
301 | { | |
302 | return hash_str(ent->name, ENT_HASHBITS); | |
303 | } | |
304 | ||
fd39ca9a | 305 | static void |
1da177e4 LT |
306 | nametoid_request(struct cache_detail *cd, struct cache_head *ch, char **bpp, |
307 | int *blen) | |
308 | { | |
309 | struct ent *ent = container_of(ch, struct ent, h); | |
310 | ||
311 | qword_add(bpp, blen, ent->authname); | |
312 | qword_add(bpp, blen, ent->type == IDMAP_TYPE_GROUP ? "group" : "user"); | |
313 | qword_add(bpp, blen, ent->name); | |
314 | ||
315 | (*bpp)[-1] = '\n'; | |
316 | } | |
317 | ||
bc74b4f5 TM |
318 | static int |
319 | nametoid_upcall(struct cache_detail *cd, struct cache_head *ch) | |
320 | { | |
321 | return sunrpc_cache_pipe_upcall(cd, ch, nametoid_request); | |
322 | } | |
323 | ||
f9ecc921 N |
324 | static int |
325 | nametoid_match(struct cache_head *ca, struct cache_head *cb) | |
1da177e4 | 326 | { |
f9ecc921 N |
327 | struct ent *a = container_of(ca, struct ent, h); |
328 | struct ent *b = container_of(cb, struct ent, h); | |
329 | ||
1da177e4 LT |
330 | return (a->type == b->type && strcmp(a->name, b->name) == 0 && |
331 | strcmp(a->authname, b->authname) == 0); | |
332 | } | |
333 | ||
334 | static int | |
335 | nametoid_show(struct seq_file *m, struct cache_detail *cd, struct cache_head *h) | |
336 | { | |
337 | struct ent *ent; | |
338 | ||
339 | if (h == NULL) { | |
340 | seq_puts(m, "#domain type name [id]\n"); | |
341 | return 0; | |
342 | } | |
343 | ent = container_of(h, struct ent, h); | |
344 | seq_printf(m, "%s %s %s", ent->authname, | |
345 | ent->type == IDMAP_TYPE_GROUP ? "group" : "user", | |
346 | ent->name); | |
347 | if (test_bit(CACHE_VALID, &h->flags)) | |
0a725fc4 | 348 | seq_printf(m, " %u", ent->id); |
1da177e4 LT |
349 | seq_printf(m, "\n"); |
350 | return 0; | |
351 | } | |
352 | ||
f9ecc921 N |
353 | static struct ent *nametoid_lookup(struct ent *); |
354 | static struct ent *nametoid_update(struct ent *, struct ent *); | |
fd39ca9a | 355 | static int nametoid_parse(struct cache_detail *, char *, int); |
1da177e4 | 356 | |
fd39ca9a | 357 | static struct cache_detail nametoid_cache = { |
f35279d3 | 358 | .owner = THIS_MODULE, |
1da177e4 LT |
359 | .hash_size = ENT_HASHMAX, |
360 | .hash_table = nametoid_table, | |
361 | .name = "nfs4.nametoid", | |
362 | .cache_put = ent_put, | |
bc74b4f5 | 363 | .cache_upcall = nametoid_upcall, |
1da177e4 LT |
364 | .cache_parse = nametoid_parse, |
365 | .cache_show = nametoid_show, | |
366 | .warn_no_listener = warn_no_idmapd, | |
f9ecc921 N |
367 | .match = nametoid_match, |
368 | .init = ent_init, | |
369 | .update = ent_init, | |
370 | .alloc = ent_alloc, | |
1da177e4 LT |
371 | }; |
372 | ||
fd39ca9a | 373 | static int |
1da177e4 LT |
374 | nametoid_parse(struct cache_detail *cd, char *buf, int buflen) |
375 | { | |
376 | struct ent ent, *res; | |
377 | char *buf1; | |
378 | int error = -EINVAL; | |
379 | ||
380 | if (buf[buflen - 1] != '\n') | |
381 | return (-EINVAL); | |
382 | buf[buflen - 1]= '\0'; | |
383 | ||
384 | buf1 = kmalloc(PAGE_SIZE, GFP_KERNEL); | |
385 | if (buf1 == NULL) | |
386 | return (-ENOMEM); | |
387 | ||
388 | memset(&ent, 0, sizeof(ent)); | |
389 | ||
390 | /* Authentication name */ | |
391 | if (qword_get(&buf, buf1, PAGE_SIZE) <= 0) | |
392 | goto out; | |
393 | memcpy(ent.authname, buf1, sizeof(ent.authname)); | |
394 | ||
395 | /* Type */ | |
396 | if (qword_get(&buf, buf1, PAGE_SIZE) <= 0) | |
397 | goto out; | |
398 | ent.type = strcmp(buf1, "user") == 0 ? | |
399 | IDMAP_TYPE_USER : IDMAP_TYPE_GROUP; | |
400 | ||
401 | /* Name */ | |
402 | error = qword_get(&buf, buf1, PAGE_SIZE); | |
403 | if (error <= 0 || error >= IDMAP_NAMESZ) | |
404 | goto out; | |
405 | memcpy(ent.name, buf1, sizeof(ent.name)); | |
406 | ||
407 | /* expiry */ | |
408 | ent.h.expiry_time = get_expiry(&buf); | |
409 | if (ent.h.expiry_time == 0) | |
410 | goto out; | |
411 | ||
412 | /* ID */ | |
413 | error = get_int(&buf, &ent.id); | |
414 | if (error == -EINVAL) | |
415 | goto out; | |
416 | if (error == -ENOENT) | |
417 | set_bit(CACHE_NEGATIVE, &ent.h.flags); | |
418 | ||
419 | error = -ENOMEM; | |
f9ecc921 N |
420 | res = nametoid_lookup(&ent); |
421 | if (res == NULL) | |
422 | goto out; | |
423 | res = nametoid_update(&ent, res); | |
424 | if (res == NULL) | |
1da177e4 LT |
425 | goto out; |
426 | ||
baab935f | 427 | cache_put(&res->h, &nametoid_cache); |
1da177e4 LT |
428 | error = 0; |
429 | out: | |
430 | kfree(buf1); | |
431 | ||
432 | return (error); | |
433 | } | |
434 | ||
f9ecc921 N |
435 | |
436 | static struct ent * | |
437 | nametoid_lookup(struct ent *item) | |
438 | { | |
439 | struct cache_head *ch = sunrpc_cache_lookup(&nametoid_cache, | |
440 | &item->h, | |
441 | nametoid_hash(item)); | |
442 | if (ch) | |
443 | return container_of(ch, struct ent, h); | |
444 | else | |
445 | return NULL; | |
446 | } | |
447 | ||
448 | static struct ent * | |
449 | nametoid_update(struct ent *new, struct ent *old) | |
450 | { | |
451 | struct cache_head *ch = sunrpc_cache_update(&nametoid_cache, | |
452 | &new->h, &old->h, | |
453 | nametoid_hash(new)); | |
454 | if (ch) | |
455 | return container_of(ch, struct ent, h); | |
456 | else | |
457 | return NULL; | |
458 | } | |
1da177e4 LT |
459 | |
460 | /* | |
461 | * Exported API | |
462 | */ | |
463 | ||
dbf847ec | 464 | int |
1da177e4 LT |
465 | nfsd_idmap_init(void) |
466 | { | |
dbf847ec BF |
467 | int rv; |
468 | ||
469 | rv = cache_register(&idtoname_cache); | |
470 | if (rv) | |
471 | return rv; | |
472 | rv = cache_register(&nametoid_cache); | |
473 | if (rv) | |
474 | cache_unregister(&idtoname_cache); | |
475 | return rv; | |
1da177e4 LT |
476 | } |
477 | ||
478 | void | |
479 | nfsd_idmap_shutdown(void) | |
480 | { | |
df95a9d4 BF |
481 | cache_unregister(&idtoname_cache); |
482 | cache_unregister(&nametoid_cache); | |
1da177e4 LT |
483 | } |
484 | ||
1da177e4 LT |
485 | static int |
486 | idmap_lookup(struct svc_rqst *rqstp, | |
f9ecc921 | 487 | struct ent *(*lookup_fn)(struct ent *), struct ent *key, |
1da177e4 LT |
488 | struct cache_detail *detail, struct ent **item) |
489 | { | |
1da177e4 LT |
490 | int ret; |
491 | ||
839049a8 N |
492 | *item = lookup_fn(key); |
493 | if (!*item) | |
1da177e4 | 494 | return -ENOMEM; |
839049a8 N |
495 | retry: |
496 | ret = cache_check(detail, &(*item)->h, &rqstp->rq_chandle); | |
497 | ||
498 | if (ret == -ETIMEDOUT) { | |
499 | struct ent *prev_item = *item; | |
500 | *item = lookup_fn(key); | |
501 | if (*item != prev_item) | |
502 | goto retry; | |
503 | cache_put(&(*item)->h, detail); | |
1da177e4 | 504 | } |
1da177e4 LT |
505 | return ret; |
506 | } | |
507 | ||
3ab4d8b1 BF |
508 | static char * |
509 | rqst_authname(struct svc_rqst *rqstp) | |
510 | { | |
511 | struct auth_domain *clp; | |
512 | ||
513 | clp = rqstp->rq_gssclient ? rqstp->rq_gssclient : rqstp->rq_client; | |
514 | return clp->name; | |
515 | } | |
516 | ||
3c726023 | 517 | static __be32 |
1da177e4 LT |
518 | idmap_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen, |
519 | uid_t *id) | |
520 | { | |
521 | struct ent *item, key = { | |
522 | .type = type, | |
523 | }; | |
524 | int ret; | |
525 | ||
526 | if (namelen + 1 > sizeof(key.name)) | |
3c726023 | 527 | return nfserr_badowner; |
1da177e4 LT |
528 | memcpy(key.name, name, namelen); |
529 | key.name[namelen] = '\0'; | |
3ab4d8b1 | 530 | strlcpy(key.authname, rqst_authname(rqstp), sizeof(key.authname)); |
1da177e4 LT |
531 | ret = idmap_lookup(rqstp, nametoid_lookup, &key, &nametoid_cache, &item); |
532 | if (ret == -ENOENT) | |
3c726023 | 533 | return nfserr_badowner; |
1da177e4 | 534 | if (ret) |
3c726023 | 535 | return nfserrno(ret); |
1da177e4 | 536 | *id = item->id; |
baab935f | 537 | cache_put(&item->h, &nametoid_cache); |
1da177e4 LT |
538 | return 0; |
539 | } | |
540 | ||
541 | static int | |
542 | idmap_id_to_name(struct svc_rqst *rqstp, int type, uid_t id, char *name) | |
543 | { | |
544 | struct ent *item, key = { | |
545 | .id = id, | |
546 | .type = type, | |
547 | }; | |
548 | int ret; | |
549 | ||
3ab4d8b1 | 550 | strlcpy(key.authname, rqst_authname(rqstp), sizeof(key.authname)); |
1da177e4 LT |
551 | ret = idmap_lookup(rqstp, idtoname_lookup, &key, &idtoname_cache, &item); |
552 | if (ret == -ENOENT) | |
553 | return sprintf(name, "%u", id); | |
554 | if (ret) | |
555 | return ret; | |
556 | ret = strlen(item->name); | |
557 | BUG_ON(ret > IDMAP_NAMESZ); | |
558 | memcpy(name, item->name, ret); | |
baab935f | 559 | cache_put(&item->h, &idtoname_cache); |
1da177e4 LT |
560 | return ret; |
561 | } | |
562 | ||
3c726023 | 563 | __be32 |
1da177e4 LT |
564 | nfsd_map_name_to_uid(struct svc_rqst *rqstp, const char *name, size_t namelen, |
565 | __u32 *id) | |
566 | { | |
567 | return idmap_name_to_id(rqstp, IDMAP_TYPE_USER, name, namelen, id); | |
568 | } | |
569 | ||
3c726023 | 570 | __be32 |
1da177e4 LT |
571 | nfsd_map_name_to_gid(struct svc_rqst *rqstp, const char *name, size_t namelen, |
572 | __u32 *id) | |
573 | { | |
574 | return idmap_name_to_id(rqstp, IDMAP_TYPE_GROUP, name, namelen, id); | |
575 | } | |
576 | ||
577 | int | |
578 | nfsd_map_uid_to_name(struct svc_rqst *rqstp, __u32 id, char *name) | |
579 | { | |
580 | return idmap_id_to_name(rqstp, IDMAP_TYPE_USER, id, name); | |
581 | } | |
582 | ||
583 | int | |
584 | nfsd_map_gid_to_name(struct svc_rqst *rqstp, __u32 id, char *name) | |
585 | { | |
586 | return idmap_id_to_name(rqstp, IDMAP_TYPE_GROUP, id, name); | |
587 | } |