Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #include <linux/types.h> |
2 | #include <linux/sched.h> | |
3 | #include <linux/module.h> | |
4 | #include <linux/sunrpc/types.h> | |
5 | #include <linux/sunrpc/xdr.h> | |
6 | #include <linux/sunrpc/svcsock.h> | |
7 | #include <linux/sunrpc/svcauth.h> | |
c4170583 | 8 | #include <linux/sunrpc/gss_api.h> |
1da177e4 LT |
9 | #include <linux/err.h> |
10 | #include <linux/seq_file.h> | |
11 | #include <linux/hash.h> | |
543537bd | 12 | #include <linux/string.h> |
7b2b1fee | 13 | #include <net/sock.h> |
1da177e4 LT |
14 | |
15 | #define RPCDBG_FACILITY RPCDBG_AUTH | |
16 | ||
17 | ||
18 | /* | |
19 | * AUTHUNIX and AUTHNULL credentials are both handled here. | |
20 | * AUTHNULL is treated just like AUTHUNIX except that the uid/gid | |
21 | * are always nobody (-2). i.e. we do the same IP address checks for | |
22 | * AUTHNULL as for AUTHUNIX, and that is done here. | |
23 | */ | |
24 | ||
25 | ||
1da177e4 LT |
26 | struct unix_domain { |
27 | struct auth_domain h; | |
28 | int addr_changes; | |
29 | /* other stuff later */ | |
30 | }; | |
31 | ||
efc36aa5 N |
32 | extern struct auth_ops svcauth_unix; |
33 | ||
1da177e4 LT |
34 | struct auth_domain *unix_domain_find(char *name) |
35 | { | |
efc36aa5 N |
36 | struct auth_domain *rv; |
37 | struct unix_domain *new = NULL; | |
38 | ||
39 | rv = auth_domain_lookup(name, NULL); | |
40 | while(1) { | |
ad1b5229 N |
41 | if (rv) { |
42 | if (new && rv != &new->h) | |
43 | auth_domain_put(&new->h); | |
44 | ||
45 | if (rv->flavour != &svcauth_unix) { | |
46 | auth_domain_put(rv); | |
47 | return NULL; | |
48 | } | |
efc36aa5 N |
49 | return rv; |
50 | } | |
efc36aa5 N |
51 | |
52 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
53 | if (new == NULL) | |
54 | return NULL; | |
55 | kref_init(&new->h.ref); | |
56 | new->h.name = kstrdup(name, GFP_KERNEL); | |
dd08d6ea N |
57 | if (new->h.name == NULL) { |
58 | kfree(new); | |
59 | return NULL; | |
60 | } | |
efc36aa5 N |
61 | new->h.flavour = &svcauth_unix; |
62 | new->addr_changes = 0; | |
63 | rv = auth_domain_lookup(name, &new->h); | |
1da177e4 | 64 | } |
1da177e4 LT |
65 | } |
66 | ||
67 | static void svcauth_unix_domain_release(struct auth_domain *dom) | |
68 | { | |
69 | struct unix_domain *ud = container_of(dom, struct unix_domain, h); | |
70 | ||
71 | kfree(dom->name); | |
72 | kfree(ud); | |
73 | } | |
74 | ||
75 | ||
76 | /************************************************** | |
77 | * cache for IP address to unix_domain | |
78 | * as needed by AUTH_UNIX | |
79 | */ | |
80 | #define IP_HASHBITS 8 | |
81 | #define IP_HASHMAX (1<<IP_HASHBITS) | |
82 | #define IP_HASHMASK (IP_HASHMAX-1) | |
83 | ||
84 | struct ip_map { | |
85 | struct cache_head h; | |
86 | char m_class[8]; /* e.g. "nfsd" */ | |
87 | struct in_addr m_addr; | |
88 | struct unix_domain *m_client; | |
89 | int m_add_change; | |
90 | }; | |
91 | static struct cache_head *ip_table[IP_HASHMAX]; | |
92 | ||
baab935f | 93 | static void ip_map_put(struct kref *kref) |
1da177e4 | 94 | { |
baab935f | 95 | struct cache_head *item = container_of(kref, struct cache_head, ref); |
1da177e4 | 96 | struct ip_map *im = container_of(item, struct ip_map,h); |
baab935f N |
97 | |
98 | if (test_bit(CACHE_VALID, &item->flags) && | |
99 | !test_bit(CACHE_NEGATIVE, &item->flags)) | |
100 | auth_domain_put(&im->m_client->h); | |
101 | kfree(im); | |
1da177e4 LT |
102 | } |
103 | ||
1f1e030b N |
104 | #if IP_HASHBITS == 8 |
105 | /* hash_long on a 64 bit machine is currently REALLY BAD for | |
106 | * IP addresses in reverse-endian (i.e. on a little-endian machine). | |
107 | * So use a trivial but reliable hash instead | |
108 | */ | |
4806126d | 109 | static inline int hash_ip(__be32 ip) |
1f1e030b | 110 | { |
4806126d | 111 | int hash = (__force u32)ip ^ ((__force u32)ip>>16); |
1f1e030b N |
112 | return (hash ^ (hash>>8)) & 0xff; |
113 | } | |
114 | #endif | |
1a9917c2 | 115 | static int ip_map_match(struct cache_head *corig, struct cache_head *cnew) |
1da177e4 | 116 | { |
1a9917c2 N |
117 | struct ip_map *orig = container_of(corig, struct ip_map, h); |
118 | struct ip_map *new = container_of(cnew, struct ip_map, h); | |
119 | return strcmp(orig->m_class, new->m_class) == 0 | |
120 | && orig->m_addr.s_addr == new->m_addr.s_addr; | |
1da177e4 | 121 | } |
1a9917c2 | 122 | static void ip_map_init(struct cache_head *cnew, struct cache_head *citem) |
1da177e4 | 123 | { |
1a9917c2 N |
124 | struct ip_map *new = container_of(cnew, struct ip_map, h); |
125 | struct ip_map *item = container_of(citem, struct ip_map, h); | |
126 | ||
1da177e4 LT |
127 | strcpy(new->m_class, item->m_class); |
128 | new->m_addr.s_addr = item->m_addr.s_addr; | |
129 | } | |
1a9917c2 | 130 | static void update(struct cache_head *cnew, struct cache_head *citem) |
1da177e4 | 131 | { |
1a9917c2 N |
132 | struct ip_map *new = container_of(cnew, struct ip_map, h); |
133 | struct ip_map *item = container_of(citem, struct ip_map, h); | |
134 | ||
efc36aa5 | 135 | kref_get(&item->m_client->h.ref); |
1da177e4 LT |
136 | new->m_client = item->m_client; |
137 | new->m_add_change = item->m_add_change; | |
138 | } | |
1a9917c2 N |
139 | static struct cache_head *ip_map_alloc(void) |
140 | { | |
141 | struct ip_map *i = kmalloc(sizeof(*i), GFP_KERNEL); | |
142 | if (i) | |
143 | return &i->h; | |
144 | else | |
145 | return NULL; | |
146 | } | |
1da177e4 LT |
147 | |
148 | static void ip_map_request(struct cache_detail *cd, | |
149 | struct cache_head *h, | |
150 | char **bpp, int *blen) | |
151 | { | |
152 | char text_addr[20]; | |
153 | struct ip_map *im = container_of(h, struct ip_map, h); | |
d8ed029d | 154 | __be32 addr = im->m_addr.s_addr; |
cca5172a | 155 | |
1da177e4 LT |
156 | snprintf(text_addr, 20, "%u.%u.%u.%u", |
157 | ntohl(addr) >> 24 & 0xff, | |
158 | ntohl(addr) >> 16 & 0xff, | |
159 | ntohl(addr) >> 8 & 0xff, | |
160 | ntohl(addr) >> 0 & 0xff); | |
161 | ||
162 | qword_add(bpp, blen, im->m_class); | |
163 | qword_add(bpp, blen, text_addr); | |
164 | (*bpp)[-1] = '\n'; | |
165 | } | |
166 | ||
1a9917c2 N |
167 | static struct ip_map *ip_map_lookup(char *class, struct in_addr addr); |
168 | static int ip_map_update(struct ip_map *ipm, struct unix_domain *udom, time_t expiry); | |
1da177e4 LT |
169 | |
170 | static int ip_map_parse(struct cache_detail *cd, | |
171 | char *mesg, int mlen) | |
172 | { | |
173 | /* class ipaddress [domainname] */ | |
174 | /* should be safe just to use the start of the input buffer | |
175 | * for scratch: */ | |
176 | char *buf = mesg; | |
177 | int len; | |
178 | int b1,b2,b3,b4; | |
179 | char c; | |
1a9917c2 N |
180 | char class[8]; |
181 | struct in_addr addr; | |
182 | int err; | |
183 | ||
184 | struct ip_map *ipmp; | |
1da177e4 LT |
185 | struct auth_domain *dom; |
186 | time_t expiry; | |
187 | ||
188 | if (mesg[mlen-1] != '\n') | |
189 | return -EINVAL; | |
190 | mesg[mlen-1] = 0; | |
191 | ||
192 | /* class */ | |
1a9917c2 | 193 | len = qword_get(&mesg, class, sizeof(class)); |
1da177e4 LT |
194 | if (len <= 0) return -EINVAL; |
195 | ||
196 | /* ip address */ | |
197 | len = qword_get(&mesg, buf, mlen); | |
198 | if (len <= 0) return -EINVAL; | |
199 | ||
200 | if (sscanf(buf, "%u.%u.%u.%u%c", &b1, &b2, &b3, &b4, &c) != 4) | |
201 | return -EINVAL; | |
cca5172a | 202 | |
1da177e4 LT |
203 | expiry = get_expiry(&mesg); |
204 | if (expiry ==0) | |
205 | return -EINVAL; | |
206 | ||
207 | /* domainname, or empty for NEGATIVE */ | |
208 | len = qword_get(&mesg, buf, mlen); | |
209 | if (len < 0) return -EINVAL; | |
210 | ||
211 | if (len) { | |
212 | dom = unix_domain_find(buf); | |
213 | if (dom == NULL) | |
214 | return -ENOENT; | |
215 | } else | |
216 | dom = NULL; | |
217 | ||
1a9917c2 | 218 | addr.s_addr = |
1da177e4 | 219 | htonl((((((b1<<8)|b2)<<8)|b3)<<8)|b4); |
1a9917c2 N |
220 | |
221 | ipmp = ip_map_lookup(class,addr); | |
222 | if (ipmp) { | |
223 | err = ip_map_update(ipmp, | |
224 | container_of(dom, struct unix_domain, h), | |
225 | expiry); | |
1da177e4 | 226 | } else |
1a9917c2 | 227 | err = -ENOMEM; |
1da177e4 | 228 | |
1da177e4 LT |
229 | if (dom) |
230 | auth_domain_put(dom); | |
1a9917c2 | 231 | |
1da177e4 | 232 | cache_flush(); |
1a9917c2 | 233 | return err; |
1da177e4 LT |
234 | } |
235 | ||
236 | static int ip_map_show(struct seq_file *m, | |
237 | struct cache_detail *cd, | |
238 | struct cache_head *h) | |
239 | { | |
240 | struct ip_map *im; | |
241 | struct in_addr addr; | |
242 | char *dom = "-no-domain-"; | |
243 | ||
244 | if (h == NULL) { | |
245 | seq_puts(m, "#class IP domain\n"); | |
246 | return 0; | |
247 | } | |
248 | im = container_of(h, struct ip_map, h); | |
249 | /* class addr domain */ | |
250 | addr = im->m_addr; | |
251 | ||
cca5172a | 252 | if (test_bit(CACHE_VALID, &h->flags) && |
1da177e4 LT |
253 | !test_bit(CACHE_NEGATIVE, &h->flags)) |
254 | dom = im->m_client->h.name; | |
255 | ||
256 | seq_printf(m, "%s %d.%d.%d.%d %s\n", | |
257 | im->m_class, | |
753ed90d AV |
258 | ntohl(addr.s_addr) >> 24 & 0xff, |
259 | ntohl(addr.s_addr) >> 16 & 0xff, | |
260 | ntohl(addr.s_addr) >> 8 & 0xff, | |
261 | ntohl(addr.s_addr) >> 0 & 0xff, | |
1da177e4 LT |
262 | dom |
263 | ); | |
264 | return 0; | |
265 | } | |
cca5172a | 266 | |
1da177e4 LT |
267 | |
268 | struct cache_detail ip_map_cache = { | |
f35279d3 | 269 | .owner = THIS_MODULE, |
1da177e4 LT |
270 | .hash_size = IP_HASHMAX, |
271 | .hash_table = ip_table, | |
272 | .name = "auth.unix.ip", | |
273 | .cache_put = ip_map_put, | |
274 | .cache_request = ip_map_request, | |
275 | .cache_parse = ip_map_parse, | |
276 | .cache_show = ip_map_show, | |
1a9917c2 N |
277 | .match = ip_map_match, |
278 | .init = ip_map_init, | |
279 | .update = update, | |
280 | .alloc = ip_map_alloc, | |
1da177e4 LT |
281 | }; |
282 | ||
1a9917c2 N |
283 | static struct ip_map *ip_map_lookup(char *class, struct in_addr addr) |
284 | { | |
285 | struct ip_map ip; | |
286 | struct cache_head *ch; | |
287 | ||
288 | strcpy(ip.m_class, class); | |
289 | ip.m_addr = addr; | |
290 | ch = sunrpc_cache_lookup(&ip_map_cache, &ip.h, | |
291 | hash_str(class, IP_HASHBITS) ^ | |
4806126d | 292 | hash_ip(addr.s_addr)); |
1a9917c2 N |
293 | |
294 | if (ch) | |
295 | return container_of(ch, struct ip_map, h); | |
296 | else | |
297 | return NULL; | |
298 | } | |
1da177e4 | 299 | |
1a9917c2 N |
300 | static int ip_map_update(struct ip_map *ipm, struct unix_domain *udom, time_t expiry) |
301 | { | |
302 | struct ip_map ip; | |
303 | struct cache_head *ch; | |
304 | ||
305 | ip.m_client = udom; | |
306 | ip.h.flags = 0; | |
307 | if (!udom) | |
308 | set_bit(CACHE_NEGATIVE, &ip.h.flags); | |
309 | else { | |
310 | ip.m_add_change = udom->addr_changes; | |
311 | /* if this is from the legacy set_client system call, | |
312 | * we need m_add_change to be one higher | |
313 | */ | |
314 | if (expiry == NEVER) | |
315 | ip.m_add_change++; | |
316 | } | |
317 | ip.h.expiry_time = expiry; | |
318 | ch = sunrpc_cache_update(&ip_map_cache, | |
319 | &ip.h, &ipm->h, | |
320 | hash_str(ipm->m_class, IP_HASHBITS) ^ | |
4806126d | 321 | hash_ip(ipm->m_addr.s_addr)); |
1a9917c2 N |
322 | if (!ch) |
323 | return -ENOMEM; | |
baab935f | 324 | cache_put(ch, &ip_map_cache); |
1a9917c2 N |
325 | return 0; |
326 | } | |
1da177e4 LT |
327 | |
328 | int auth_unix_add_addr(struct in_addr addr, struct auth_domain *dom) | |
329 | { | |
330 | struct unix_domain *udom; | |
1a9917c2 | 331 | struct ip_map *ipmp; |
1da177e4 | 332 | |
efc36aa5 | 333 | if (dom->flavour != &svcauth_unix) |
1da177e4 LT |
334 | return -EINVAL; |
335 | udom = container_of(dom, struct unix_domain, h); | |
1a9917c2 | 336 | ipmp = ip_map_lookup("nfsd", addr); |
1da177e4 | 337 | |
1a9917c2 N |
338 | if (ipmp) |
339 | return ip_map_update(ipmp, udom, NEVER); | |
340 | else | |
1da177e4 LT |
341 | return -ENOMEM; |
342 | } | |
343 | ||
344 | int auth_unix_forget_old(struct auth_domain *dom) | |
345 | { | |
346 | struct unix_domain *udom; | |
cca5172a | 347 | |
efc36aa5 | 348 | if (dom->flavour != &svcauth_unix) |
1da177e4 LT |
349 | return -EINVAL; |
350 | udom = container_of(dom, struct unix_domain, h); | |
351 | udom->addr_changes++; | |
352 | return 0; | |
353 | } | |
354 | ||
355 | struct auth_domain *auth_unix_lookup(struct in_addr addr) | |
356 | { | |
40f10522 | 357 | struct ip_map *ipm; |
1da177e4 LT |
358 | struct auth_domain *rv; |
359 | ||
1a9917c2 | 360 | ipm = ip_map_lookup("nfsd", addr); |
1da177e4 LT |
361 | |
362 | if (!ipm) | |
363 | return NULL; | |
364 | if (cache_check(&ip_map_cache, &ipm->h, NULL)) | |
365 | return NULL; | |
366 | ||
367 | if ((ipm->m_client->addr_changes - ipm->m_add_change) >0) { | |
368 | if (test_and_set_bit(CACHE_NEGATIVE, &ipm->h.flags) == 0) | |
369 | auth_domain_put(&ipm->m_client->h); | |
370 | rv = NULL; | |
371 | } else { | |
372 | rv = &ipm->m_client->h; | |
efc36aa5 | 373 | kref_get(&rv->ref); |
1da177e4 | 374 | } |
baab935f | 375 | cache_put(&ipm->h, &ip_map_cache); |
1da177e4 LT |
376 | return rv; |
377 | } | |
378 | ||
379 | void svcauth_unix_purge(void) | |
380 | { | |
381 | cache_purge(&ip_map_cache); | |
1da177e4 LT |
382 | } |
383 | ||
7b2b1fee GB |
384 | static inline struct ip_map * |
385 | ip_map_cached_get(struct svc_rqst *rqstp) | |
386 | { | |
30f3deee N |
387 | struct ip_map *ipm; |
388 | struct svc_sock *svsk = rqstp->rq_sock; | |
7ac1bea5 | 389 | spin_lock(&svsk->sk_lock); |
30f3deee | 390 | ipm = svsk->sk_info_authunix; |
7b2b1fee GB |
391 | if (ipm != NULL) { |
392 | if (!cache_valid(&ipm->h)) { | |
393 | /* | |
394 | * The entry has been invalidated since it was | |
395 | * remembered, e.g. by a second mount from the | |
396 | * same IP address. | |
397 | */ | |
30f3deee | 398 | svsk->sk_info_authunix = NULL; |
7ac1bea5 | 399 | spin_unlock(&svsk->sk_lock); |
7b2b1fee GB |
400 | cache_put(&ipm->h, &ip_map_cache); |
401 | return NULL; | |
402 | } | |
403 | cache_get(&ipm->h); | |
404 | } | |
7ac1bea5 | 405 | spin_unlock(&svsk->sk_lock); |
7b2b1fee GB |
406 | return ipm; |
407 | } | |
408 | ||
409 | static inline void | |
410 | ip_map_cached_put(struct svc_rqst *rqstp, struct ip_map *ipm) | |
411 | { | |
412 | struct svc_sock *svsk = rqstp->rq_sock; | |
413 | ||
7ac1bea5 | 414 | spin_lock(&svsk->sk_lock); |
30f3deee N |
415 | if (svsk->sk_sock->type == SOCK_STREAM && |
416 | svsk->sk_info_authunix == NULL) { | |
417 | /* newly cached, keep the reference */ | |
418 | svsk->sk_info_authunix = ipm; | |
419 | ipm = NULL; | |
420 | } | |
7ac1bea5 | 421 | spin_unlock(&svsk->sk_lock); |
30f3deee | 422 | if (ipm) |
7b2b1fee GB |
423 | cache_put(&ipm->h, &ip_map_cache); |
424 | } | |
425 | ||
426 | void | |
427 | svcauth_unix_info_release(void *info) | |
428 | { | |
429 | struct ip_map *ipm = info; | |
430 | cache_put(&ipm->h, &ip_map_cache); | |
431 | } | |
432 | ||
3fc605a2 N |
433 | /**************************************************************************** |
434 | * auth.unix.gid cache | |
435 | * simple cache to map a UID to a list of GIDs | |
436 | * because AUTH_UNIX aka AUTH_SYS has a max of 16 | |
437 | */ | |
438 | #define GID_HASHBITS 8 | |
439 | #define GID_HASHMAX (1<<GID_HASHBITS) | |
440 | #define GID_HASHMASK (GID_HASHMAX - 1) | |
441 | ||
442 | struct unix_gid { | |
443 | struct cache_head h; | |
444 | uid_t uid; | |
445 | struct group_info *gi; | |
446 | }; | |
447 | static struct cache_head *gid_table[GID_HASHMAX]; | |
448 | ||
449 | static void unix_gid_put(struct kref *kref) | |
450 | { | |
451 | struct cache_head *item = container_of(kref, struct cache_head, ref); | |
452 | struct unix_gid *ug = container_of(item, struct unix_gid, h); | |
453 | if (test_bit(CACHE_VALID, &item->flags) && | |
454 | !test_bit(CACHE_NEGATIVE, &item->flags)) | |
455 | put_group_info(ug->gi); | |
456 | kfree(ug); | |
457 | } | |
458 | ||
459 | static int unix_gid_match(struct cache_head *corig, struct cache_head *cnew) | |
460 | { | |
461 | struct unix_gid *orig = container_of(corig, struct unix_gid, h); | |
462 | struct unix_gid *new = container_of(cnew, struct unix_gid, h); | |
463 | return orig->uid == new->uid; | |
464 | } | |
465 | static void unix_gid_init(struct cache_head *cnew, struct cache_head *citem) | |
466 | { | |
467 | struct unix_gid *new = container_of(cnew, struct unix_gid, h); | |
468 | struct unix_gid *item = container_of(citem, struct unix_gid, h); | |
469 | new->uid = item->uid; | |
470 | } | |
471 | static void unix_gid_update(struct cache_head *cnew, struct cache_head *citem) | |
472 | { | |
473 | struct unix_gid *new = container_of(cnew, struct unix_gid, h); | |
474 | struct unix_gid *item = container_of(citem, struct unix_gid, h); | |
475 | ||
476 | get_group_info(item->gi); | |
477 | new->gi = item->gi; | |
478 | } | |
479 | static struct cache_head *unix_gid_alloc(void) | |
480 | { | |
481 | struct unix_gid *g = kmalloc(sizeof(*g), GFP_KERNEL); | |
482 | if (g) | |
483 | return &g->h; | |
484 | else | |
485 | return NULL; | |
486 | } | |
487 | ||
488 | static void unix_gid_request(struct cache_detail *cd, | |
489 | struct cache_head *h, | |
490 | char **bpp, int *blen) | |
491 | { | |
492 | char tuid[20]; | |
493 | struct unix_gid *ug = container_of(h, struct unix_gid, h); | |
494 | ||
495 | snprintf(tuid, 20, "%u", ug->uid); | |
496 | qword_add(bpp, blen, tuid); | |
497 | (*bpp)[-1] = '\n'; | |
498 | } | |
499 | ||
500 | static struct unix_gid *unix_gid_lookup(uid_t uid); | |
501 | extern struct cache_detail unix_gid_cache; | |
502 | ||
503 | static int unix_gid_parse(struct cache_detail *cd, | |
504 | char *mesg, int mlen) | |
505 | { | |
506 | /* uid expiry Ngid gid0 gid1 ... gidN-1 */ | |
507 | int uid; | |
508 | int gids; | |
509 | int rv; | |
510 | int i; | |
511 | int err; | |
512 | time_t expiry; | |
513 | struct unix_gid ug, *ugp; | |
514 | ||
515 | if (mlen <= 0 || mesg[mlen-1] != '\n') | |
516 | return -EINVAL; | |
517 | mesg[mlen-1] = 0; | |
518 | ||
519 | rv = get_int(&mesg, &uid); | |
520 | if (rv) | |
521 | return -EINVAL; | |
522 | ug.uid = uid; | |
523 | ||
524 | expiry = get_expiry(&mesg); | |
525 | if (expiry == 0) | |
526 | return -EINVAL; | |
527 | ||
528 | rv = get_int(&mesg, &gids); | |
529 | if (rv || gids < 0 || gids > 8192) | |
530 | return -EINVAL; | |
531 | ||
532 | ug.gi = groups_alloc(gids); | |
533 | if (!ug.gi) | |
534 | return -ENOMEM; | |
535 | ||
536 | for (i = 0 ; i < gids ; i++) { | |
537 | int gid; | |
538 | rv = get_int(&mesg, &gid); | |
539 | err = -EINVAL; | |
540 | if (rv) | |
541 | goto out; | |
542 | GROUP_AT(ug.gi, i) = gid; | |
543 | } | |
544 | ||
545 | ugp = unix_gid_lookup(uid); | |
546 | if (ugp) { | |
547 | struct cache_head *ch; | |
548 | ug.h.flags = 0; | |
549 | ug.h.expiry_time = expiry; | |
550 | ch = sunrpc_cache_update(&unix_gid_cache, | |
551 | &ug.h, &ugp->h, | |
552 | hash_long(uid, GID_HASHBITS)); | |
553 | if (!ch) | |
554 | err = -ENOMEM; | |
555 | else { | |
556 | err = 0; | |
557 | cache_put(ch, &unix_gid_cache); | |
558 | } | |
559 | } else | |
560 | err = -ENOMEM; | |
561 | out: | |
562 | if (ug.gi) | |
563 | put_group_info(ug.gi); | |
564 | return err; | |
565 | } | |
566 | ||
567 | static int unix_gid_show(struct seq_file *m, | |
568 | struct cache_detail *cd, | |
569 | struct cache_head *h) | |
570 | { | |
571 | struct unix_gid *ug; | |
572 | int i; | |
573 | int glen; | |
574 | ||
575 | if (h == NULL) { | |
576 | seq_puts(m, "#uid cnt: gids...\n"); | |
577 | return 0; | |
578 | } | |
579 | ug = container_of(h, struct unix_gid, h); | |
580 | if (test_bit(CACHE_VALID, &h->flags) && | |
581 | !test_bit(CACHE_NEGATIVE, &h->flags)) | |
582 | glen = ug->gi->ngroups; | |
583 | else | |
584 | glen = 0; | |
585 | ||
586 | seq_printf(m, "%d %d:", ug->uid, glen); | |
587 | for (i = 0; i < glen; i++) | |
588 | seq_printf(m, " %d", GROUP_AT(ug->gi, i)); | |
589 | seq_printf(m, "\n"); | |
590 | return 0; | |
591 | } | |
592 | ||
593 | struct cache_detail unix_gid_cache = { | |
594 | .owner = THIS_MODULE, | |
595 | .hash_size = GID_HASHMAX, | |
596 | .hash_table = gid_table, | |
597 | .name = "auth.unix.gid", | |
598 | .cache_put = unix_gid_put, | |
599 | .cache_request = unix_gid_request, | |
600 | .cache_parse = unix_gid_parse, | |
601 | .cache_show = unix_gid_show, | |
602 | .match = unix_gid_match, | |
603 | .init = unix_gid_init, | |
604 | .update = unix_gid_update, | |
605 | .alloc = unix_gid_alloc, | |
606 | }; | |
607 | ||
608 | static struct unix_gid *unix_gid_lookup(uid_t uid) | |
609 | { | |
610 | struct unix_gid ug; | |
611 | struct cache_head *ch; | |
612 | ||
613 | ug.uid = uid; | |
614 | ch = sunrpc_cache_lookup(&unix_gid_cache, &ug.h, | |
615 | hash_long(uid, GID_HASHBITS)); | |
616 | if (ch) | |
617 | return container_of(ch, struct unix_gid, h); | |
618 | else | |
619 | return NULL; | |
620 | } | |
621 | ||
622 | static int unix_gid_find(uid_t uid, struct group_info **gip, | |
623 | struct svc_rqst *rqstp) | |
624 | { | |
625 | struct unix_gid *ug = unix_gid_lookup(uid); | |
626 | if (!ug) | |
627 | return -EAGAIN; | |
628 | switch (cache_check(&unix_gid_cache, &ug->h, &rqstp->rq_chandle)) { | |
629 | case -ENOENT: | |
630 | *gip = NULL; | |
631 | return 0; | |
632 | case 0: | |
633 | *gip = ug->gi; | |
634 | get_group_info(*gip); | |
635 | return 0; | |
636 | default: | |
637 | return -EAGAIN; | |
638 | } | |
639 | } | |
640 | ||
3ab4d8b1 | 641 | int |
1da177e4 LT |
642 | svcauth_unix_set_client(struct svc_rqst *rqstp) |
643 | { | |
27459f09 | 644 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
1a9917c2 | 645 | struct ip_map *ipm; |
1da177e4 LT |
646 | |
647 | rqstp->rq_client = NULL; | |
648 | if (rqstp->rq_proc == 0) | |
649 | return SVC_OK; | |
650 | ||
7b2b1fee GB |
651 | ipm = ip_map_cached_get(rqstp); |
652 | if (ipm == NULL) | |
653 | ipm = ip_map_lookup(rqstp->rq_server->sv_program->pg_class, | |
27459f09 | 654 | sin->sin_addr); |
1da177e4 LT |
655 | |
656 | if (ipm == NULL) | |
657 | return SVC_DENIED; | |
658 | ||
659 | switch (cache_check(&ip_map_cache, &ipm->h, &rqstp->rq_chandle)) { | |
660 | default: | |
661 | BUG(); | |
662 | case -EAGAIN: | |
e0bb89ef | 663 | case -ETIMEDOUT: |
1da177e4 LT |
664 | return SVC_DROP; |
665 | case -ENOENT: | |
666 | return SVC_DENIED; | |
667 | case 0: | |
668 | rqstp->rq_client = &ipm->m_client->h; | |
efc36aa5 | 669 | kref_get(&rqstp->rq_client->ref); |
7b2b1fee | 670 | ip_map_cached_put(rqstp, ipm); |
1da177e4 LT |
671 | break; |
672 | } | |
673 | return SVC_OK; | |
674 | } | |
675 | ||
3ab4d8b1 BF |
676 | EXPORT_SYMBOL(svcauth_unix_set_client); |
677 | ||
1da177e4 | 678 | static int |
d8ed029d | 679 | svcauth_null_accept(struct svc_rqst *rqstp, __be32 *authp) |
1da177e4 LT |
680 | { |
681 | struct kvec *argv = &rqstp->rq_arg.head[0]; | |
682 | struct kvec *resv = &rqstp->rq_res.head[0]; | |
683 | struct svc_cred *cred = &rqstp->rq_cred; | |
684 | ||
685 | cred->cr_group_info = NULL; | |
686 | rqstp->rq_client = NULL; | |
687 | ||
688 | if (argv->iov_len < 3*4) | |
689 | return SVC_GARBAGE; | |
690 | ||
cca5172a | 691 | if (svc_getu32(argv) != 0) { |
1da177e4 LT |
692 | dprintk("svc: bad null cred\n"); |
693 | *authp = rpc_autherr_badcred; | |
694 | return SVC_DENIED; | |
695 | } | |
76994313 | 696 | if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) { |
1da177e4 LT |
697 | dprintk("svc: bad null verf\n"); |
698 | *authp = rpc_autherr_badverf; | |
699 | return SVC_DENIED; | |
700 | } | |
701 | ||
702 | /* Signal that mapping to nobody uid/gid is required */ | |
703 | cred->cr_uid = (uid_t) -1; | |
704 | cred->cr_gid = (gid_t) -1; | |
705 | cred->cr_group_info = groups_alloc(0); | |
706 | if (cred->cr_group_info == NULL) | |
707 | return SVC_DROP; /* kmalloc failure - client must retry */ | |
708 | ||
709 | /* Put NULL verifier */ | |
76994313 AD |
710 | svc_putnl(resv, RPC_AUTH_NULL); |
711 | svc_putnl(resv, 0); | |
1da177e4 | 712 | |
c4170583 | 713 | rqstp->rq_flavor = RPC_AUTH_NULL; |
1da177e4 LT |
714 | return SVC_OK; |
715 | } | |
716 | ||
717 | static int | |
718 | svcauth_null_release(struct svc_rqst *rqstp) | |
719 | { | |
720 | if (rqstp->rq_client) | |
721 | auth_domain_put(rqstp->rq_client); | |
722 | rqstp->rq_client = NULL; | |
723 | if (rqstp->rq_cred.cr_group_info) | |
724 | put_group_info(rqstp->rq_cred.cr_group_info); | |
725 | rqstp->rq_cred.cr_group_info = NULL; | |
726 | ||
727 | return 0; /* don't drop */ | |
728 | } | |
729 | ||
730 | ||
731 | struct auth_ops svcauth_null = { | |
732 | .name = "null", | |
733 | .owner = THIS_MODULE, | |
734 | .flavour = RPC_AUTH_NULL, | |
735 | .accept = svcauth_null_accept, | |
736 | .release = svcauth_null_release, | |
737 | .set_client = svcauth_unix_set_client, | |
738 | }; | |
739 | ||
740 | ||
741 | static int | |
d8ed029d | 742 | svcauth_unix_accept(struct svc_rqst *rqstp, __be32 *authp) |
1da177e4 LT |
743 | { |
744 | struct kvec *argv = &rqstp->rq_arg.head[0]; | |
745 | struct kvec *resv = &rqstp->rq_res.head[0]; | |
746 | struct svc_cred *cred = &rqstp->rq_cred; | |
747 | u32 slen, i; | |
748 | int len = argv->iov_len; | |
749 | ||
750 | cred->cr_group_info = NULL; | |
751 | rqstp->rq_client = NULL; | |
752 | ||
753 | if ((len -= 3*4) < 0) | |
754 | return SVC_GARBAGE; | |
755 | ||
756 | svc_getu32(argv); /* length */ | |
757 | svc_getu32(argv); /* time stamp */ | |
76994313 | 758 | slen = XDR_QUADLEN(svc_getnl(argv)); /* machname length */ |
1da177e4 LT |
759 | if (slen > 64 || (len -= (slen + 3)*4) < 0) |
760 | goto badcred; | |
d8ed029d | 761 | argv->iov_base = (void*)((__be32*)argv->iov_base + slen); /* skip machname */ |
1da177e4 LT |
762 | argv->iov_len -= slen*4; |
763 | ||
76994313 AD |
764 | cred->cr_uid = svc_getnl(argv); /* uid */ |
765 | cred->cr_gid = svc_getnl(argv); /* gid */ | |
766 | slen = svc_getnl(argv); /* gids length */ | |
1da177e4 LT |
767 | if (slen > 16 || (len -= (slen + 2)*4) < 0) |
768 | goto badcred; | |
3fc605a2 N |
769 | if (unix_gid_find(cred->cr_uid, &cred->cr_group_info, rqstp) |
770 | == -EAGAIN) | |
1da177e4 | 771 | return SVC_DROP; |
3fc605a2 N |
772 | if (cred->cr_group_info == NULL) { |
773 | cred->cr_group_info = groups_alloc(slen); | |
774 | if (cred->cr_group_info == NULL) | |
775 | return SVC_DROP; | |
776 | for (i = 0; i < slen; i++) | |
777 | GROUP_AT(cred->cr_group_info, i) = svc_getnl(argv); | |
778 | } else { | |
779 | for (i = 0; i < slen ; i++) | |
780 | svc_getnl(argv); | |
781 | } | |
76994313 | 782 | if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) { |
1da177e4 LT |
783 | *authp = rpc_autherr_badverf; |
784 | return SVC_DENIED; | |
785 | } | |
786 | ||
787 | /* Put NULL verifier */ | |
76994313 AD |
788 | svc_putnl(resv, RPC_AUTH_NULL); |
789 | svc_putnl(resv, 0); | |
1da177e4 | 790 | |
c4170583 | 791 | rqstp->rq_flavor = RPC_AUTH_UNIX; |
1da177e4 LT |
792 | return SVC_OK; |
793 | ||
794 | badcred: | |
795 | *authp = rpc_autherr_badcred; | |
796 | return SVC_DENIED; | |
797 | } | |
798 | ||
799 | static int | |
800 | svcauth_unix_release(struct svc_rqst *rqstp) | |
801 | { | |
802 | /* Verifier (such as it is) is already in place. | |
803 | */ | |
804 | if (rqstp->rq_client) | |
805 | auth_domain_put(rqstp->rq_client); | |
806 | rqstp->rq_client = NULL; | |
807 | if (rqstp->rq_cred.cr_group_info) | |
808 | put_group_info(rqstp->rq_cred.cr_group_info); | |
809 | rqstp->rq_cred.cr_group_info = NULL; | |
810 | ||
811 | return 0; | |
812 | } | |
813 | ||
814 | ||
815 | struct auth_ops svcauth_unix = { | |
816 | .name = "unix", | |
817 | .owner = THIS_MODULE, | |
818 | .flavour = RPC_AUTH_UNIX, | |
819 | .accept = svcauth_unix_accept, | |
820 | .release = svcauth_unix_release, | |
821 | .domain_release = svcauth_unix_domain_release, | |
822 | .set_client = svcauth_unix_set_client, | |
823 | }; | |
824 |