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 | 65 | } |
d2f7e79e | 66 | EXPORT_SYMBOL(unix_domain_find); |
1da177e4 LT |
67 | |
68 | static void svcauth_unix_domain_release(struct auth_domain *dom) | |
69 | { | |
70 | struct unix_domain *ud = container_of(dom, struct unix_domain, h); | |
71 | ||
72 | kfree(dom->name); | |
73 | kfree(ud); | |
74 | } | |
75 | ||
76 | ||
77 | /************************************************** | |
78 | * cache for IP address to unix_domain | |
79 | * as needed by AUTH_UNIX | |
80 | */ | |
81 | #define IP_HASHBITS 8 | |
82 | #define IP_HASHMAX (1<<IP_HASHBITS) | |
83 | #define IP_HASHMASK (IP_HASHMAX-1) | |
84 | ||
85 | struct ip_map { | |
86 | struct cache_head h; | |
87 | char m_class[8]; /* e.g. "nfsd" */ | |
88 | struct in_addr m_addr; | |
89 | struct unix_domain *m_client; | |
90 | int m_add_change; | |
91 | }; | |
92 | static struct cache_head *ip_table[IP_HASHMAX]; | |
93 | ||
baab935f | 94 | static void ip_map_put(struct kref *kref) |
1da177e4 | 95 | { |
baab935f | 96 | struct cache_head *item = container_of(kref, struct cache_head, ref); |
1da177e4 | 97 | struct ip_map *im = container_of(item, struct ip_map,h); |
baab935f N |
98 | |
99 | if (test_bit(CACHE_VALID, &item->flags) && | |
100 | !test_bit(CACHE_NEGATIVE, &item->flags)) | |
101 | auth_domain_put(&im->m_client->h); | |
102 | kfree(im); | |
1da177e4 LT |
103 | } |
104 | ||
1f1e030b N |
105 | #if IP_HASHBITS == 8 |
106 | /* hash_long on a 64 bit machine is currently REALLY BAD for | |
107 | * IP addresses in reverse-endian (i.e. on a little-endian machine). | |
108 | * So use a trivial but reliable hash instead | |
109 | */ | |
4806126d | 110 | static inline int hash_ip(__be32 ip) |
1f1e030b | 111 | { |
4806126d | 112 | int hash = (__force u32)ip ^ ((__force u32)ip>>16); |
1f1e030b N |
113 | return (hash ^ (hash>>8)) & 0xff; |
114 | } | |
115 | #endif | |
1a9917c2 | 116 | static int ip_map_match(struct cache_head *corig, struct cache_head *cnew) |
1da177e4 | 117 | { |
1a9917c2 N |
118 | struct ip_map *orig = container_of(corig, struct ip_map, h); |
119 | struct ip_map *new = container_of(cnew, struct ip_map, h); | |
120 | return strcmp(orig->m_class, new->m_class) == 0 | |
121 | && orig->m_addr.s_addr == new->m_addr.s_addr; | |
1da177e4 | 122 | } |
1a9917c2 | 123 | static void ip_map_init(struct cache_head *cnew, struct cache_head *citem) |
1da177e4 | 124 | { |
1a9917c2 N |
125 | struct ip_map *new = container_of(cnew, struct ip_map, h); |
126 | struct ip_map *item = container_of(citem, struct ip_map, h); | |
127 | ||
1da177e4 LT |
128 | strcpy(new->m_class, item->m_class); |
129 | new->m_addr.s_addr = item->m_addr.s_addr; | |
130 | } | |
1a9917c2 | 131 | static void update(struct cache_head *cnew, struct cache_head *citem) |
1da177e4 | 132 | { |
1a9917c2 N |
133 | struct ip_map *new = container_of(cnew, struct ip_map, h); |
134 | struct ip_map *item = container_of(citem, struct ip_map, h); | |
135 | ||
efc36aa5 | 136 | kref_get(&item->m_client->h.ref); |
1da177e4 LT |
137 | new->m_client = item->m_client; |
138 | new->m_add_change = item->m_add_change; | |
139 | } | |
1a9917c2 N |
140 | static struct cache_head *ip_map_alloc(void) |
141 | { | |
142 | struct ip_map *i = kmalloc(sizeof(*i), GFP_KERNEL); | |
143 | if (i) | |
144 | return &i->h; | |
145 | else | |
146 | return NULL; | |
147 | } | |
1da177e4 LT |
148 | |
149 | static void ip_map_request(struct cache_detail *cd, | |
150 | struct cache_head *h, | |
151 | char **bpp, int *blen) | |
152 | { | |
153 | char text_addr[20]; | |
154 | struct ip_map *im = container_of(h, struct ip_map, h); | |
d8ed029d | 155 | __be32 addr = im->m_addr.s_addr; |
cca5172a | 156 | |
1da177e4 LT |
157 | snprintf(text_addr, 20, "%u.%u.%u.%u", |
158 | ntohl(addr) >> 24 & 0xff, | |
159 | ntohl(addr) >> 16 & 0xff, | |
160 | ntohl(addr) >> 8 & 0xff, | |
161 | ntohl(addr) >> 0 & 0xff); | |
162 | ||
163 | qword_add(bpp, blen, im->m_class); | |
164 | qword_add(bpp, blen, text_addr); | |
165 | (*bpp)[-1] = '\n'; | |
166 | } | |
167 | ||
1a9917c2 N |
168 | static struct ip_map *ip_map_lookup(char *class, struct in_addr addr); |
169 | static int ip_map_update(struct ip_map *ipm, struct unix_domain *udom, time_t expiry); | |
1da177e4 LT |
170 | |
171 | static int ip_map_parse(struct cache_detail *cd, | |
172 | char *mesg, int mlen) | |
173 | { | |
174 | /* class ipaddress [domainname] */ | |
175 | /* should be safe just to use the start of the input buffer | |
176 | * for scratch: */ | |
177 | char *buf = mesg; | |
178 | int len; | |
179 | int b1,b2,b3,b4; | |
180 | char c; | |
1a9917c2 N |
181 | char class[8]; |
182 | struct in_addr addr; | |
183 | int err; | |
184 | ||
185 | struct ip_map *ipmp; | |
1da177e4 LT |
186 | struct auth_domain *dom; |
187 | time_t expiry; | |
188 | ||
189 | if (mesg[mlen-1] != '\n') | |
190 | return -EINVAL; | |
191 | mesg[mlen-1] = 0; | |
192 | ||
193 | /* class */ | |
1a9917c2 | 194 | len = qword_get(&mesg, class, sizeof(class)); |
1da177e4 LT |
195 | if (len <= 0) return -EINVAL; |
196 | ||
197 | /* ip address */ | |
198 | len = qword_get(&mesg, buf, mlen); | |
199 | if (len <= 0) return -EINVAL; | |
200 | ||
201 | if (sscanf(buf, "%u.%u.%u.%u%c", &b1, &b2, &b3, &b4, &c) != 4) | |
202 | return -EINVAL; | |
cca5172a | 203 | |
1da177e4 LT |
204 | expiry = get_expiry(&mesg); |
205 | if (expiry ==0) | |
206 | return -EINVAL; | |
207 | ||
208 | /* domainname, or empty for NEGATIVE */ | |
209 | len = qword_get(&mesg, buf, mlen); | |
210 | if (len < 0) return -EINVAL; | |
211 | ||
212 | if (len) { | |
213 | dom = unix_domain_find(buf); | |
214 | if (dom == NULL) | |
215 | return -ENOENT; | |
216 | } else | |
217 | dom = NULL; | |
218 | ||
1a9917c2 | 219 | addr.s_addr = |
1da177e4 | 220 | htonl((((((b1<<8)|b2)<<8)|b3)<<8)|b4); |
1a9917c2 N |
221 | |
222 | ipmp = ip_map_lookup(class,addr); | |
223 | if (ipmp) { | |
224 | err = ip_map_update(ipmp, | |
225 | container_of(dom, struct unix_domain, h), | |
226 | expiry); | |
1da177e4 | 227 | } else |
1a9917c2 | 228 | err = -ENOMEM; |
1da177e4 | 229 | |
1da177e4 LT |
230 | if (dom) |
231 | auth_domain_put(dom); | |
1a9917c2 | 232 | |
1da177e4 | 233 | cache_flush(); |
1a9917c2 | 234 | return err; |
1da177e4 LT |
235 | } |
236 | ||
237 | static int ip_map_show(struct seq_file *m, | |
238 | struct cache_detail *cd, | |
239 | struct cache_head *h) | |
240 | { | |
241 | struct ip_map *im; | |
242 | struct in_addr addr; | |
243 | char *dom = "-no-domain-"; | |
244 | ||
245 | if (h == NULL) { | |
246 | seq_puts(m, "#class IP domain\n"); | |
247 | return 0; | |
248 | } | |
249 | im = container_of(h, struct ip_map, h); | |
250 | /* class addr domain */ | |
251 | addr = im->m_addr; | |
252 | ||
cca5172a | 253 | if (test_bit(CACHE_VALID, &h->flags) && |
1da177e4 LT |
254 | !test_bit(CACHE_NEGATIVE, &h->flags)) |
255 | dom = im->m_client->h.name; | |
256 | ||
257 | seq_printf(m, "%s %d.%d.%d.%d %s\n", | |
258 | im->m_class, | |
753ed90d AV |
259 | ntohl(addr.s_addr) >> 24 & 0xff, |
260 | ntohl(addr.s_addr) >> 16 & 0xff, | |
261 | ntohl(addr.s_addr) >> 8 & 0xff, | |
262 | ntohl(addr.s_addr) >> 0 & 0xff, | |
1da177e4 LT |
263 | dom |
264 | ); | |
265 | return 0; | |
266 | } | |
cca5172a | 267 | |
1da177e4 LT |
268 | |
269 | struct cache_detail ip_map_cache = { | |
f35279d3 | 270 | .owner = THIS_MODULE, |
1da177e4 LT |
271 | .hash_size = IP_HASHMAX, |
272 | .hash_table = ip_table, | |
273 | .name = "auth.unix.ip", | |
274 | .cache_put = ip_map_put, | |
275 | .cache_request = ip_map_request, | |
276 | .cache_parse = ip_map_parse, | |
277 | .cache_show = ip_map_show, | |
1a9917c2 N |
278 | .match = ip_map_match, |
279 | .init = ip_map_init, | |
280 | .update = update, | |
281 | .alloc = ip_map_alloc, | |
1da177e4 LT |
282 | }; |
283 | ||
1a9917c2 N |
284 | static struct ip_map *ip_map_lookup(char *class, struct in_addr addr) |
285 | { | |
286 | struct ip_map ip; | |
287 | struct cache_head *ch; | |
288 | ||
289 | strcpy(ip.m_class, class); | |
290 | ip.m_addr = addr; | |
291 | ch = sunrpc_cache_lookup(&ip_map_cache, &ip.h, | |
292 | hash_str(class, IP_HASHBITS) ^ | |
4806126d | 293 | hash_ip(addr.s_addr)); |
1a9917c2 N |
294 | |
295 | if (ch) | |
296 | return container_of(ch, struct ip_map, h); | |
297 | else | |
298 | return NULL; | |
299 | } | |
1da177e4 | 300 | |
1a9917c2 N |
301 | static int ip_map_update(struct ip_map *ipm, struct unix_domain *udom, time_t expiry) |
302 | { | |
303 | struct ip_map ip; | |
304 | struct cache_head *ch; | |
305 | ||
306 | ip.m_client = udom; | |
307 | ip.h.flags = 0; | |
308 | if (!udom) | |
309 | set_bit(CACHE_NEGATIVE, &ip.h.flags); | |
310 | else { | |
311 | ip.m_add_change = udom->addr_changes; | |
312 | /* if this is from the legacy set_client system call, | |
313 | * we need m_add_change to be one higher | |
314 | */ | |
315 | if (expiry == NEVER) | |
316 | ip.m_add_change++; | |
317 | } | |
318 | ip.h.expiry_time = expiry; | |
319 | ch = sunrpc_cache_update(&ip_map_cache, | |
320 | &ip.h, &ipm->h, | |
321 | hash_str(ipm->m_class, IP_HASHBITS) ^ | |
4806126d | 322 | hash_ip(ipm->m_addr.s_addr)); |
1a9917c2 N |
323 | if (!ch) |
324 | return -ENOMEM; | |
baab935f | 325 | cache_put(ch, &ip_map_cache); |
1a9917c2 N |
326 | return 0; |
327 | } | |
1da177e4 LT |
328 | |
329 | int auth_unix_add_addr(struct in_addr addr, struct auth_domain *dom) | |
330 | { | |
331 | struct unix_domain *udom; | |
1a9917c2 | 332 | struct ip_map *ipmp; |
1da177e4 | 333 | |
efc36aa5 | 334 | if (dom->flavour != &svcauth_unix) |
1da177e4 LT |
335 | return -EINVAL; |
336 | udom = container_of(dom, struct unix_domain, h); | |
1a9917c2 | 337 | ipmp = ip_map_lookup("nfsd", addr); |
1da177e4 | 338 | |
1a9917c2 N |
339 | if (ipmp) |
340 | return ip_map_update(ipmp, udom, NEVER); | |
341 | else | |
1da177e4 LT |
342 | return -ENOMEM; |
343 | } | |
d2f7e79e | 344 | EXPORT_SYMBOL(auth_unix_add_addr); |
1da177e4 LT |
345 | |
346 | int auth_unix_forget_old(struct auth_domain *dom) | |
347 | { | |
348 | struct unix_domain *udom; | |
cca5172a | 349 | |
efc36aa5 | 350 | if (dom->flavour != &svcauth_unix) |
1da177e4 LT |
351 | return -EINVAL; |
352 | udom = container_of(dom, struct unix_domain, h); | |
353 | udom->addr_changes++; | |
354 | return 0; | |
355 | } | |
d2f7e79e | 356 | EXPORT_SYMBOL(auth_unix_forget_old); |
1da177e4 LT |
357 | |
358 | struct auth_domain *auth_unix_lookup(struct in_addr addr) | |
359 | { | |
40f10522 | 360 | struct ip_map *ipm; |
1da177e4 LT |
361 | struct auth_domain *rv; |
362 | ||
1a9917c2 | 363 | ipm = ip_map_lookup("nfsd", addr); |
1da177e4 LT |
364 | |
365 | if (!ipm) | |
366 | return NULL; | |
367 | if (cache_check(&ip_map_cache, &ipm->h, NULL)) | |
368 | return NULL; | |
369 | ||
370 | if ((ipm->m_client->addr_changes - ipm->m_add_change) >0) { | |
371 | if (test_and_set_bit(CACHE_NEGATIVE, &ipm->h.flags) == 0) | |
372 | auth_domain_put(&ipm->m_client->h); | |
373 | rv = NULL; | |
374 | } else { | |
375 | rv = &ipm->m_client->h; | |
efc36aa5 | 376 | kref_get(&rv->ref); |
1da177e4 | 377 | } |
baab935f | 378 | cache_put(&ipm->h, &ip_map_cache); |
1da177e4 LT |
379 | return rv; |
380 | } | |
d2f7e79e | 381 | EXPORT_SYMBOL(auth_unix_lookup); |
1da177e4 LT |
382 | |
383 | void svcauth_unix_purge(void) | |
384 | { | |
385 | cache_purge(&ip_map_cache); | |
1da177e4 | 386 | } |
d2f7e79e | 387 | EXPORT_SYMBOL(svcauth_unix_purge); |
1da177e4 | 388 | |
7b2b1fee GB |
389 | static inline struct ip_map * |
390 | ip_map_cached_get(struct svc_rqst *rqstp) | |
391 | { | |
def13d74 TT |
392 | struct ip_map *ipm = NULL; |
393 | struct svc_xprt *xprt = rqstp->rq_xprt; | |
394 | ||
395 | if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) { | |
396 | spin_lock(&xprt->xpt_lock); | |
397 | ipm = xprt->xpt_auth_cache; | |
398 | if (ipm != NULL) { | |
399 | if (!cache_valid(&ipm->h)) { | |
400 | /* | |
401 | * The entry has been invalidated since it was | |
402 | * remembered, e.g. by a second mount from the | |
403 | * same IP address. | |
404 | */ | |
405 | xprt->xpt_auth_cache = NULL; | |
406 | spin_unlock(&xprt->xpt_lock); | |
407 | cache_put(&ipm->h, &ip_map_cache); | |
408 | return NULL; | |
409 | } | |
410 | cache_get(&ipm->h); | |
7b2b1fee | 411 | } |
def13d74 | 412 | spin_unlock(&xprt->xpt_lock); |
7b2b1fee GB |
413 | } |
414 | return ipm; | |
415 | } | |
416 | ||
417 | static inline void | |
418 | ip_map_cached_put(struct svc_rqst *rqstp, struct ip_map *ipm) | |
419 | { | |
def13d74 TT |
420 | struct svc_xprt *xprt = rqstp->rq_xprt; |
421 | ||
422 | if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) { | |
423 | spin_lock(&xprt->xpt_lock); | |
424 | if (xprt->xpt_auth_cache == NULL) { | |
425 | /* newly cached, keep the reference */ | |
426 | xprt->xpt_auth_cache = ipm; | |
427 | ipm = NULL; | |
428 | } | |
429 | spin_unlock(&xprt->xpt_lock); | |
30f3deee | 430 | } |
30f3deee | 431 | if (ipm) |
7b2b1fee GB |
432 | cache_put(&ipm->h, &ip_map_cache); |
433 | } | |
434 | ||
435 | void | |
436 | svcauth_unix_info_release(void *info) | |
437 | { | |
438 | struct ip_map *ipm = info; | |
439 | cache_put(&ipm->h, &ip_map_cache); | |
440 | } | |
441 | ||
3fc605a2 N |
442 | /**************************************************************************** |
443 | * auth.unix.gid cache | |
444 | * simple cache to map a UID to a list of GIDs | |
445 | * because AUTH_UNIX aka AUTH_SYS has a max of 16 | |
446 | */ | |
447 | #define GID_HASHBITS 8 | |
448 | #define GID_HASHMAX (1<<GID_HASHBITS) | |
449 | #define GID_HASHMASK (GID_HASHMAX - 1) | |
450 | ||
451 | struct unix_gid { | |
452 | struct cache_head h; | |
453 | uid_t uid; | |
454 | struct group_info *gi; | |
455 | }; | |
456 | static struct cache_head *gid_table[GID_HASHMAX]; | |
457 | ||
458 | static void unix_gid_put(struct kref *kref) | |
459 | { | |
460 | struct cache_head *item = container_of(kref, struct cache_head, ref); | |
461 | struct unix_gid *ug = container_of(item, struct unix_gid, h); | |
462 | if (test_bit(CACHE_VALID, &item->flags) && | |
463 | !test_bit(CACHE_NEGATIVE, &item->flags)) | |
464 | put_group_info(ug->gi); | |
465 | kfree(ug); | |
466 | } | |
467 | ||
468 | static int unix_gid_match(struct cache_head *corig, struct cache_head *cnew) | |
469 | { | |
470 | struct unix_gid *orig = container_of(corig, struct unix_gid, h); | |
471 | struct unix_gid *new = container_of(cnew, struct unix_gid, h); | |
472 | return orig->uid == new->uid; | |
473 | } | |
474 | static void unix_gid_init(struct cache_head *cnew, struct cache_head *citem) | |
475 | { | |
476 | struct unix_gid *new = container_of(cnew, struct unix_gid, h); | |
477 | struct unix_gid *item = container_of(citem, struct unix_gid, h); | |
478 | new->uid = item->uid; | |
479 | } | |
480 | static void unix_gid_update(struct cache_head *cnew, struct cache_head *citem) | |
481 | { | |
482 | struct unix_gid *new = container_of(cnew, struct unix_gid, h); | |
483 | struct unix_gid *item = container_of(citem, struct unix_gid, h); | |
484 | ||
485 | get_group_info(item->gi); | |
486 | new->gi = item->gi; | |
487 | } | |
488 | static struct cache_head *unix_gid_alloc(void) | |
489 | { | |
490 | struct unix_gid *g = kmalloc(sizeof(*g), GFP_KERNEL); | |
491 | if (g) | |
492 | return &g->h; | |
493 | else | |
494 | return NULL; | |
495 | } | |
496 | ||
497 | static void unix_gid_request(struct cache_detail *cd, | |
498 | struct cache_head *h, | |
499 | char **bpp, int *blen) | |
500 | { | |
501 | char tuid[20]; | |
502 | struct unix_gid *ug = container_of(h, struct unix_gid, h); | |
503 | ||
504 | snprintf(tuid, 20, "%u", ug->uid); | |
505 | qword_add(bpp, blen, tuid); | |
506 | (*bpp)[-1] = '\n'; | |
507 | } | |
508 | ||
509 | static struct unix_gid *unix_gid_lookup(uid_t uid); | |
510 | extern struct cache_detail unix_gid_cache; | |
511 | ||
512 | static int unix_gid_parse(struct cache_detail *cd, | |
513 | char *mesg, int mlen) | |
514 | { | |
515 | /* uid expiry Ngid gid0 gid1 ... gidN-1 */ | |
516 | int uid; | |
517 | int gids; | |
518 | int rv; | |
519 | int i; | |
520 | int err; | |
521 | time_t expiry; | |
522 | struct unix_gid ug, *ugp; | |
523 | ||
524 | if (mlen <= 0 || mesg[mlen-1] != '\n') | |
525 | return -EINVAL; | |
526 | mesg[mlen-1] = 0; | |
527 | ||
528 | rv = get_int(&mesg, &uid); | |
529 | if (rv) | |
530 | return -EINVAL; | |
531 | ug.uid = uid; | |
532 | ||
533 | expiry = get_expiry(&mesg); | |
534 | if (expiry == 0) | |
535 | return -EINVAL; | |
536 | ||
537 | rv = get_int(&mesg, &gids); | |
538 | if (rv || gids < 0 || gids > 8192) | |
539 | return -EINVAL; | |
540 | ||
541 | ug.gi = groups_alloc(gids); | |
542 | if (!ug.gi) | |
543 | return -ENOMEM; | |
544 | ||
545 | for (i = 0 ; i < gids ; i++) { | |
546 | int gid; | |
547 | rv = get_int(&mesg, &gid); | |
548 | err = -EINVAL; | |
549 | if (rv) | |
550 | goto out; | |
551 | GROUP_AT(ug.gi, i) = gid; | |
552 | } | |
553 | ||
554 | ugp = unix_gid_lookup(uid); | |
555 | if (ugp) { | |
556 | struct cache_head *ch; | |
557 | ug.h.flags = 0; | |
558 | ug.h.expiry_time = expiry; | |
559 | ch = sunrpc_cache_update(&unix_gid_cache, | |
560 | &ug.h, &ugp->h, | |
561 | hash_long(uid, GID_HASHBITS)); | |
562 | if (!ch) | |
563 | err = -ENOMEM; | |
564 | else { | |
565 | err = 0; | |
566 | cache_put(ch, &unix_gid_cache); | |
567 | } | |
568 | } else | |
569 | err = -ENOMEM; | |
570 | out: | |
571 | if (ug.gi) | |
572 | put_group_info(ug.gi); | |
573 | return err; | |
574 | } | |
575 | ||
576 | static int unix_gid_show(struct seq_file *m, | |
577 | struct cache_detail *cd, | |
578 | struct cache_head *h) | |
579 | { | |
580 | struct unix_gid *ug; | |
581 | int i; | |
582 | int glen; | |
583 | ||
584 | if (h == NULL) { | |
585 | seq_puts(m, "#uid cnt: gids...\n"); | |
586 | return 0; | |
587 | } | |
588 | ug = container_of(h, struct unix_gid, h); | |
589 | if (test_bit(CACHE_VALID, &h->flags) && | |
590 | !test_bit(CACHE_NEGATIVE, &h->flags)) | |
591 | glen = ug->gi->ngroups; | |
592 | else | |
593 | glen = 0; | |
594 | ||
595 | seq_printf(m, "%d %d:", ug->uid, glen); | |
596 | for (i = 0; i < glen; i++) | |
597 | seq_printf(m, " %d", GROUP_AT(ug->gi, i)); | |
598 | seq_printf(m, "\n"); | |
599 | return 0; | |
600 | } | |
601 | ||
602 | struct cache_detail unix_gid_cache = { | |
603 | .owner = THIS_MODULE, | |
604 | .hash_size = GID_HASHMAX, | |
605 | .hash_table = gid_table, | |
606 | .name = "auth.unix.gid", | |
607 | .cache_put = unix_gid_put, | |
608 | .cache_request = unix_gid_request, | |
609 | .cache_parse = unix_gid_parse, | |
610 | .cache_show = unix_gid_show, | |
611 | .match = unix_gid_match, | |
612 | .init = unix_gid_init, | |
613 | .update = unix_gid_update, | |
614 | .alloc = unix_gid_alloc, | |
615 | }; | |
616 | ||
617 | static struct unix_gid *unix_gid_lookup(uid_t uid) | |
618 | { | |
619 | struct unix_gid ug; | |
620 | struct cache_head *ch; | |
621 | ||
622 | ug.uid = uid; | |
623 | ch = sunrpc_cache_lookup(&unix_gid_cache, &ug.h, | |
624 | hash_long(uid, GID_HASHBITS)); | |
625 | if (ch) | |
626 | return container_of(ch, struct unix_gid, h); | |
627 | else | |
628 | return NULL; | |
629 | } | |
630 | ||
631 | static int unix_gid_find(uid_t uid, struct group_info **gip, | |
632 | struct svc_rqst *rqstp) | |
633 | { | |
634 | struct unix_gid *ug = unix_gid_lookup(uid); | |
635 | if (!ug) | |
636 | return -EAGAIN; | |
637 | switch (cache_check(&unix_gid_cache, &ug->h, &rqstp->rq_chandle)) { | |
638 | case -ENOENT: | |
639 | *gip = NULL; | |
640 | return 0; | |
641 | case 0: | |
642 | *gip = ug->gi; | |
643 | get_group_info(*gip); | |
644 | return 0; | |
645 | default: | |
646 | return -EAGAIN; | |
647 | } | |
648 | } | |
649 | ||
3ab4d8b1 | 650 | int |
1da177e4 LT |
651 | svcauth_unix_set_client(struct svc_rqst *rqstp) |
652 | { | |
27459f09 | 653 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
1a9917c2 | 654 | struct ip_map *ipm; |
1da177e4 LT |
655 | |
656 | rqstp->rq_client = NULL; | |
657 | if (rqstp->rq_proc == 0) | |
658 | return SVC_OK; | |
659 | ||
7b2b1fee GB |
660 | ipm = ip_map_cached_get(rqstp); |
661 | if (ipm == NULL) | |
662 | ipm = ip_map_lookup(rqstp->rq_server->sv_program->pg_class, | |
27459f09 | 663 | sin->sin_addr); |
1da177e4 LT |
664 | |
665 | if (ipm == NULL) | |
666 | return SVC_DENIED; | |
667 | ||
668 | switch (cache_check(&ip_map_cache, &ipm->h, &rqstp->rq_chandle)) { | |
669 | default: | |
670 | BUG(); | |
671 | case -EAGAIN: | |
e0bb89ef | 672 | case -ETIMEDOUT: |
1da177e4 LT |
673 | return SVC_DROP; |
674 | case -ENOENT: | |
675 | return SVC_DENIED; | |
676 | case 0: | |
677 | rqstp->rq_client = &ipm->m_client->h; | |
efc36aa5 | 678 | kref_get(&rqstp->rq_client->ref); |
7b2b1fee | 679 | ip_map_cached_put(rqstp, ipm); |
1da177e4 LT |
680 | break; |
681 | } | |
682 | return SVC_OK; | |
683 | } | |
684 | ||
3ab4d8b1 BF |
685 | EXPORT_SYMBOL(svcauth_unix_set_client); |
686 | ||
1da177e4 | 687 | static int |
d8ed029d | 688 | svcauth_null_accept(struct svc_rqst *rqstp, __be32 *authp) |
1da177e4 LT |
689 | { |
690 | struct kvec *argv = &rqstp->rq_arg.head[0]; | |
691 | struct kvec *resv = &rqstp->rq_res.head[0]; | |
692 | struct svc_cred *cred = &rqstp->rq_cred; | |
693 | ||
694 | cred->cr_group_info = NULL; | |
695 | rqstp->rq_client = NULL; | |
696 | ||
697 | if (argv->iov_len < 3*4) | |
698 | return SVC_GARBAGE; | |
699 | ||
cca5172a | 700 | if (svc_getu32(argv) != 0) { |
1da177e4 LT |
701 | dprintk("svc: bad null cred\n"); |
702 | *authp = rpc_autherr_badcred; | |
703 | return SVC_DENIED; | |
704 | } | |
76994313 | 705 | if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) { |
1da177e4 LT |
706 | dprintk("svc: bad null verf\n"); |
707 | *authp = rpc_autherr_badverf; | |
708 | return SVC_DENIED; | |
709 | } | |
710 | ||
711 | /* Signal that mapping to nobody uid/gid is required */ | |
712 | cred->cr_uid = (uid_t) -1; | |
713 | cred->cr_gid = (gid_t) -1; | |
714 | cred->cr_group_info = groups_alloc(0); | |
715 | if (cred->cr_group_info == NULL) | |
716 | return SVC_DROP; /* kmalloc failure - client must retry */ | |
717 | ||
718 | /* Put NULL verifier */ | |
76994313 AD |
719 | svc_putnl(resv, RPC_AUTH_NULL); |
720 | svc_putnl(resv, 0); | |
1da177e4 | 721 | |
c4170583 | 722 | rqstp->rq_flavor = RPC_AUTH_NULL; |
1da177e4 LT |
723 | return SVC_OK; |
724 | } | |
725 | ||
726 | static int | |
727 | svcauth_null_release(struct svc_rqst *rqstp) | |
728 | { | |
729 | if (rqstp->rq_client) | |
730 | auth_domain_put(rqstp->rq_client); | |
731 | rqstp->rq_client = NULL; | |
732 | if (rqstp->rq_cred.cr_group_info) | |
733 | put_group_info(rqstp->rq_cred.cr_group_info); | |
734 | rqstp->rq_cred.cr_group_info = NULL; | |
735 | ||
736 | return 0; /* don't drop */ | |
737 | } | |
738 | ||
739 | ||
740 | struct auth_ops svcauth_null = { | |
741 | .name = "null", | |
742 | .owner = THIS_MODULE, | |
743 | .flavour = RPC_AUTH_NULL, | |
744 | .accept = svcauth_null_accept, | |
745 | .release = svcauth_null_release, | |
746 | .set_client = svcauth_unix_set_client, | |
747 | }; | |
748 | ||
749 | ||
750 | static int | |
d8ed029d | 751 | svcauth_unix_accept(struct svc_rqst *rqstp, __be32 *authp) |
1da177e4 LT |
752 | { |
753 | struct kvec *argv = &rqstp->rq_arg.head[0]; | |
754 | struct kvec *resv = &rqstp->rq_res.head[0]; | |
755 | struct svc_cred *cred = &rqstp->rq_cred; | |
756 | u32 slen, i; | |
757 | int len = argv->iov_len; | |
758 | ||
759 | cred->cr_group_info = NULL; | |
760 | rqstp->rq_client = NULL; | |
761 | ||
762 | if ((len -= 3*4) < 0) | |
763 | return SVC_GARBAGE; | |
764 | ||
765 | svc_getu32(argv); /* length */ | |
766 | svc_getu32(argv); /* time stamp */ | |
76994313 | 767 | slen = XDR_QUADLEN(svc_getnl(argv)); /* machname length */ |
1da177e4 LT |
768 | if (slen > 64 || (len -= (slen + 3)*4) < 0) |
769 | goto badcred; | |
d8ed029d | 770 | argv->iov_base = (void*)((__be32*)argv->iov_base + slen); /* skip machname */ |
1da177e4 LT |
771 | argv->iov_len -= slen*4; |
772 | ||
76994313 AD |
773 | cred->cr_uid = svc_getnl(argv); /* uid */ |
774 | cred->cr_gid = svc_getnl(argv); /* gid */ | |
775 | slen = svc_getnl(argv); /* gids length */ | |
1da177e4 LT |
776 | if (slen > 16 || (len -= (slen + 2)*4) < 0) |
777 | goto badcred; | |
3fc605a2 N |
778 | if (unix_gid_find(cred->cr_uid, &cred->cr_group_info, rqstp) |
779 | == -EAGAIN) | |
1da177e4 | 780 | return SVC_DROP; |
3fc605a2 N |
781 | if (cred->cr_group_info == NULL) { |
782 | cred->cr_group_info = groups_alloc(slen); | |
783 | if (cred->cr_group_info == NULL) | |
784 | return SVC_DROP; | |
785 | for (i = 0; i < slen; i++) | |
786 | GROUP_AT(cred->cr_group_info, i) = svc_getnl(argv); | |
787 | } else { | |
788 | for (i = 0; i < slen ; i++) | |
789 | svc_getnl(argv); | |
790 | } | |
76994313 | 791 | if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) { |
1da177e4 LT |
792 | *authp = rpc_autherr_badverf; |
793 | return SVC_DENIED; | |
794 | } | |
795 | ||
796 | /* Put NULL verifier */ | |
76994313 AD |
797 | svc_putnl(resv, RPC_AUTH_NULL); |
798 | svc_putnl(resv, 0); | |
1da177e4 | 799 | |
c4170583 | 800 | rqstp->rq_flavor = RPC_AUTH_UNIX; |
1da177e4 LT |
801 | return SVC_OK; |
802 | ||
803 | badcred: | |
804 | *authp = rpc_autherr_badcred; | |
805 | return SVC_DENIED; | |
806 | } | |
807 | ||
808 | static int | |
809 | svcauth_unix_release(struct svc_rqst *rqstp) | |
810 | { | |
811 | /* Verifier (such as it is) is already in place. | |
812 | */ | |
813 | if (rqstp->rq_client) | |
814 | auth_domain_put(rqstp->rq_client); | |
815 | rqstp->rq_client = NULL; | |
816 | if (rqstp->rq_cred.cr_group_info) | |
817 | put_group_info(rqstp->rq_cred.cr_group_info); | |
818 | rqstp->rq_cred.cr_group_info = NULL; | |
819 | ||
820 | return 0; | |
821 | } | |
822 | ||
823 | ||
824 | struct auth_ops svcauth_unix = { | |
825 | .name = "unix", | |
826 | .owner = THIS_MODULE, | |
827 | .flavour = RPC_AUTH_UNIX, | |
828 | .accept = svcauth_unix_accept, | |
829 | .release = svcauth_unix_release, | |
830 | .domain_release = svcauth_unix_domain_release, | |
831 | .set_client = svcauth_unix_set_client, | |
832 | }; | |
833 |