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> |
f15364bd AC |
14 | #include <net/ipv6.h> |
15 | #include <linux/kernel.h> | |
1da177e4 LT |
16 | #define RPCDBG_FACILITY RPCDBG_AUTH |
17 | ||
18 | ||
19 | /* | |
20 | * AUTHUNIX and AUTHNULL credentials are both handled here. | |
21 | * AUTHNULL is treated just like AUTHUNIX except that the uid/gid | |
22 | * are always nobody (-2). i.e. we do the same IP address checks for | |
23 | * AUTHNULL as for AUTHUNIX, and that is done here. | |
24 | */ | |
25 | ||
26 | ||
1da177e4 LT |
27 | struct unix_domain { |
28 | struct auth_domain h; | |
29 | int addr_changes; | |
30 | /* other stuff later */ | |
31 | }; | |
32 | ||
efc36aa5 N |
33 | extern struct auth_ops svcauth_unix; |
34 | ||
1da177e4 LT |
35 | struct auth_domain *unix_domain_find(char *name) |
36 | { | |
efc36aa5 N |
37 | struct auth_domain *rv; |
38 | struct unix_domain *new = NULL; | |
39 | ||
40 | rv = auth_domain_lookup(name, NULL); | |
41 | while(1) { | |
ad1b5229 N |
42 | if (rv) { |
43 | if (new && rv != &new->h) | |
44 | auth_domain_put(&new->h); | |
45 | ||
46 | if (rv->flavour != &svcauth_unix) { | |
47 | auth_domain_put(rv); | |
48 | return NULL; | |
49 | } | |
efc36aa5 N |
50 | return rv; |
51 | } | |
efc36aa5 N |
52 | |
53 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
54 | if (new == NULL) | |
55 | return NULL; | |
56 | kref_init(&new->h.ref); | |
57 | new->h.name = kstrdup(name, GFP_KERNEL); | |
dd08d6ea N |
58 | if (new->h.name == NULL) { |
59 | kfree(new); | |
60 | return NULL; | |
61 | } | |
efc36aa5 N |
62 | new->h.flavour = &svcauth_unix; |
63 | new->addr_changes = 0; | |
64 | rv = auth_domain_lookup(name, &new->h); | |
1da177e4 | 65 | } |
1da177e4 | 66 | } |
24c3767e | 67 | EXPORT_SYMBOL_GPL(unix_domain_find); |
1da177e4 LT |
68 | |
69 | static void svcauth_unix_domain_release(struct auth_domain *dom) | |
70 | { | |
71 | struct unix_domain *ud = container_of(dom, struct unix_domain, h); | |
72 | ||
73 | kfree(dom->name); | |
74 | kfree(ud); | |
75 | } | |
76 | ||
77 | ||
78 | /************************************************** | |
79 | * cache for IP address to unix_domain | |
80 | * as needed by AUTH_UNIX | |
81 | */ | |
82 | #define IP_HASHBITS 8 | |
83 | #define IP_HASHMAX (1<<IP_HASHBITS) | |
84 | #define IP_HASHMASK (IP_HASHMAX-1) | |
85 | ||
86 | struct ip_map { | |
87 | struct cache_head h; | |
88 | char m_class[8]; /* e.g. "nfsd" */ | |
f15364bd | 89 | struct in6_addr m_addr; |
1da177e4 LT |
90 | struct unix_domain *m_client; |
91 | int m_add_change; | |
92 | }; | |
93 | static struct cache_head *ip_table[IP_HASHMAX]; | |
94 | ||
baab935f | 95 | static void ip_map_put(struct kref *kref) |
1da177e4 | 96 | { |
baab935f | 97 | struct cache_head *item = container_of(kref, struct cache_head, ref); |
1da177e4 | 98 | struct ip_map *im = container_of(item, struct ip_map,h); |
baab935f N |
99 | |
100 | if (test_bit(CACHE_VALID, &item->flags) && | |
101 | !test_bit(CACHE_NEGATIVE, &item->flags)) | |
102 | auth_domain_put(&im->m_client->h); | |
103 | kfree(im); | |
1da177e4 LT |
104 | } |
105 | ||
1f1e030b N |
106 | #if IP_HASHBITS == 8 |
107 | /* hash_long on a 64 bit machine is currently REALLY BAD for | |
108 | * IP addresses in reverse-endian (i.e. on a little-endian machine). | |
109 | * So use a trivial but reliable hash instead | |
110 | */ | |
4806126d | 111 | static inline int hash_ip(__be32 ip) |
1f1e030b | 112 | { |
4806126d | 113 | int hash = (__force u32)ip ^ ((__force u32)ip>>16); |
1f1e030b N |
114 | return (hash ^ (hash>>8)) & 0xff; |
115 | } | |
116 | #endif | |
f15364bd AC |
117 | static inline int hash_ip6(struct in6_addr ip) |
118 | { | |
119 | return (hash_ip(ip.s6_addr32[0]) ^ | |
120 | hash_ip(ip.s6_addr32[1]) ^ | |
121 | hash_ip(ip.s6_addr32[2]) ^ | |
122 | hash_ip(ip.s6_addr32[3])); | |
123 | } | |
1a9917c2 | 124 | static int ip_map_match(struct cache_head *corig, struct cache_head *cnew) |
1da177e4 | 125 | { |
1a9917c2 N |
126 | struct ip_map *orig = container_of(corig, struct ip_map, h); |
127 | struct ip_map *new = container_of(cnew, struct ip_map, h); | |
128 | return strcmp(orig->m_class, new->m_class) == 0 | |
f15364bd | 129 | && ipv6_addr_equal(&orig->m_addr, &new->m_addr); |
1da177e4 | 130 | } |
1a9917c2 | 131 | static void ip_map_init(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 | ||
1da177e4 | 136 | strcpy(new->m_class, item->m_class); |
f15364bd | 137 | ipv6_addr_copy(&new->m_addr, &item->m_addr); |
1da177e4 | 138 | } |
1a9917c2 | 139 | static void update(struct cache_head *cnew, struct cache_head *citem) |
1da177e4 | 140 | { |
1a9917c2 N |
141 | struct ip_map *new = container_of(cnew, struct ip_map, h); |
142 | struct ip_map *item = container_of(citem, struct ip_map, h); | |
143 | ||
efc36aa5 | 144 | kref_get(&item->m_client->h.ref); |
1da177e4 LT |
145 | new->m_client = item->m_client; |
146 | new->m_add_change = item->m_add_change; | |
147 | } | |
1a9917c2 N |
148 | static struct cache_head *ip_map_alloc(void) |
149 | { | |
150 | struct ip_map *i = kmalloc(sizeof(*i), GFP_KERNEL); | |
151 | if (i) | |
152 | return &i->h; | |
153 | else | |
154 | return NULL; | |
155 | } | |
1da177e4 LT |
156 | |
157 | static void ip_map_request(struct cache_detail *cd, | |
158 | struct cache_head *h, | |
159 | char **bpp, int *blen) | |
160 | { | |
f15364bd | 161 | char text_addr[40]; |
1da177e4 | 162 | struct ip_map *im = container_of(h, struct ip_map, h); |
1da177e4 | 163 | |
f15364bd | 164 | if (ipv6_addr_v4mapped(&(im->m_addr))) { |
21454aaa | 165 | snprintf(text_addr, 20, "%pI4", &im->m_addr.s6_addr32[3]); |
f15364bd | 166 | } else { |
5b095d98 | 167 | snprintf(text_addr, 40, "%pI6", &im->m_addr); |
f15364bd | 168 | } |
1da177e4 LT |
169 | qword_add(bpp, blen, im->m_class); |
170 | qword_add(bpp, blen, text_addr); | |
171 | (*bpp)[-1] = '\n'; | |
172 | } | |
173 | ||
bc74b4f5 TM |
174 | static int ip_map_upcall(struct cache_detail *cd, struct cache_head *h) |
175 | { | |
176 | return sunrpc_cache_pipe_upcall(cd, h, ip_map_request); | |
177 | } | |
178 | ||
f15364bd | 179 | static struct ip_map *ip_map_lookup(char *class, struct in6_addr *addr); |
1a9917c2 | 180 | static int ip_map_update(struct ip_map *ipm, struct unix_domain *udom, time_t expiry); |
1da177e4 LT |
181 | |
182 | static int ip_map_parse(struct cache_detail *cd, | |
183 | char *mesg, int mlen) | |
184 | { | |
185 | /* class ipaddress [domainname] */ | |
186 | /* should be safe just to use the start of the input buffer | |
187 | * for scratch: */ | |
188 | char *buf = mesg; | |
189 | int len; | |
f15364bd | 190 | int b1, b2, b3, b4, b5, b6, b7, b8; |
1da177e4 | 191 | char c; |
1a9917c2 | 192 | char class[8]; |
f15364bd | 193 | struct in6_addr addr; |
1a9917c2 N |
194 | int err; |
195 | ||
196 | struct ip_map *ipmp; | |
1da177e4 LT |
197 | struct auth_domain *dom; |
198 | time_t expiry; | |
199 | ||
200 | if (mesg[mlen-1] != '\n') | |
201 | return -EINVAL; | |
202 | mesg[mlen-1] = 0; | |
203 | ||
204 | /* class */ | |
1a9917c2 | 205 | len = qword_get(&mesg, class, sizeof(class)); |
1da177e4 LT |
206 | if (len <= 0) return -EINVAL; |
207 | ||
208 | /* ip address */ | |
209 | len = qword_get(&mesg, buf, mlen); | |
210 | if (len <= 0) return -EINVAL; | |
211 | ||
21454aaa | 212 | if (sscanf(buf, "%u.%u.%u.%u%c", &b1, &b2, &b3, &b4, &c) == 4) { |
f15364bd AC |
213 | addr.s6_addr32[0] = 0; |
214 | addr.s6_addr32[1] = 0; | |
215 | addr.s6_addr32[2] = htonl(0xffff); | |
216 | addr.s6_addr32[3] = | |
217 | htonl((((((b1<<8)|b2)<<8)|b3)<<8)|b4); | |
b189db5d | 218 | } else if (sscanf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x%c", |
f15364bd AC |
219 | &b1, &b2, &b3, &b4, &b5, &b6, &b7, &b8, &c) == 8) { |
220 | addr.s6_addr16[0] = htons(b1); | |
221 | addr.s6_addr16[1] = htons(b2); | |
222 | addr.s6_addr16[2] = htons(b3); | |
223 | addr.s6_addr16[3] = htons(b4); | |
224 | addr.s6_addr16[4] = htons(b5); | |
225 | addr.s6_addr16[5] = htons(b6); | |
226 | addr.s6_addr16[6] = htons(b7); | |
227 | addr.s6_addr16[7] = htons(b8); | |
228 | } else | |
1da177e4 | 229 | return -EINVAL; |
cca5172a | 230 | |
1da177e4 LT |
231 | expiry = get_expiry(&mesg); |
232 | if (expiry ==0) | |
233 | return -EINVAL; | |
234 | ||
235 | /* domainname, or empty for NEGATIVE */ | |
236 | len = qword_get(&mesg, buf, mlen); | |
237 | if (len < 0) return -EINVAL; | |
238 | ||
239 | if (len) { | |
240 | dom = unix_domain_find(buf); | |
241 | if (dom == NULL) | |
242 | return -ENOENT; | |
243 | } else | |
244 | dom = NULL; | |
245 | ||
f15364bd | 246 | ipmp = ip_map_lookup(class, &addr); |
1a9917c2 N |
247 | if (ipmp) { |
248 | err = ip_map_update(ipmp, | |
249 | container_of(dom, struct unix_domain, h), | |
250 | expiry); | |
1da177e4 | 251 | } else |
1a9917c2 | 252 | err = -ENOMEM; |
1da177e4 | 253 | |
1da177e4 LT |
254 | if (dom) |
255 | auth_domain_put(dom); | |
1a9917c2 | 256 | |
1da177e4 | 257 | cache_flush(); |
1a9917c2 | 258 | return err; |
1da177e4 LT |
259 | } |
260 | ||
261 | static int ip_map_show(struct seq_file *m, | |
262 | struct cache_detail *cd, | |
263 | struct cache_head *h) | |
264 | { | |
265 | struct ip_map *im; | |
f15364bd | 266 | struct in6_addr addr; |
1da177e4 LT |
267 | char *dom = "-no-domain-"; |
268 | ||
269 | if (h == NULL) { | |
270 | seq_puts(m, "#class IP domain\n"); | |
271 | return 0; | |
272 | } | |
273 | im = container_of(h, struct ip_map, h); | |
274 | /* class addr domain */ | |
f15364bd | 275 | ipv6_addr_copy(&addr, &im->m_addr); |
1da177e4 | 276 | |
cca5172a | 277 | if (test_bit(CACHE_VALID, &h->flags) && |
1da177e4 LT |
278 | !test_bit(CACHE_NEGATIVE, &h->flags)) |
279 | dom = im->m_client->h.name; | |
280 | ||
f15364bd | 281 | if (ipv6_addr_v4mapped(&addr)) { |
21454aaa HH |
282 | seq_printf(m, "%s %pI4 %s\n", |
283 | im->m_class, &addr.s6_addr32[3], dom); | |
f15364bd | 284 | } else { |
5b095d98 | 285 | seq_printf(m, "%s %pI6 %s\n", im->m_class, &addr, dom); |
f15364bd | 286 | } |
1da177e4 LT |
287 | return 0; |
288 | } | |
cca5172a | 289 | |
1da177e4 LT |
290 | |
291 | struct cache_detail ip_map_cache = { | |
f35279d3 | 292 | .owner = THIS_MODULE, |
1da177e4 LT |
293 | .hash_size = IP_HASHMAX, |
294 | .hash_table = ip_table, | |
295 | .name = "auth.unix.ip", | |
296 | .cache_put = ip_map_put, | |
bc74b4f5 | 297 | .cache_upcall = ip_map_upcall, |
1da177e4 LT |
298 | .cache_parse = ip_map_parse, |
299 | .cache_show = ip_map_show, | |
1a9917c2 N |
300 | .match = ip_map_match, |
301 | .init = ip_map_init, | |
302 | .update = update, | |
303 | .alloc = ip_map_alloc, | |
1da177e4 LT |
304 | }; |
305 | ||
f15364bd | 306 | static struct ip_map *ip_map_lookup(char *class, struct in6_addr *addr) |
1a9917c2 N |
307 | { |
308 | struct ip_map ip; | |
309 | struct cache_head *ch; | |
310 | ||
311 | strcpy(ip.m_class, class); | |
f15364bd | 312 | ipv6_addr_copy(&ip.m_addr, addr); |
1a9917c2 N |
313 | ch = sunrpc_cache_lookup(&ip_map_cache, &ip.h, |
314 | hash_str(class, IP_HASHBITS) ^ | |
f15364bd | 315 | hash_ip6(*addr)); |
1a9917c2 N |
316 | |
317 | if (ch) | |
318 | return container_of(ch, struct ip_map, h); | |
319 | else | |
320 | return NULL; | |
321 | } | |
1da177e4 | 322 | |
1a9917c2 N |
323 | static int ip_map_update(struct ip_map *ipm, struct unix_domain *udom, time_t expiry) |
324 | { | |
325 | struct ip_map ip; | |
326 | struct cache_head *ch; | |
327 | ||
328 | ip.m_client = udom; | |
329 | ip.h.flags = 0; | |
330 | if (!udom) | |
331 | set_bit(CACHE_NEGATIVE, &ip.h.flags); | |
332 | else { | |
333 | ip.m_add_change = udom->addr_changes; | |
334 | /* if this is from the legacy set_client system call, | |
335 | * we need m_add_change to be one higher | |
336 | */ | |
337 | if (expiry == NEVER) | |
338 | ip.m_add_change++; | |
339 | } | |
340 | ip.h.expiry_time = expiry; | |
341 | ch = sunrpc_cache_update(&ip_map_cache, | |
342 | &ip.h, &ipm->h, | |
343 | hash_str(ipm->m_class, IP_HASHBITS) ^ | |
f15364bd | 344 | hash_ip6(ipm->m_addr)); |
1a9917c2 N |
345 | if (!ch) |
346 | return -ENOMEM; | |
baab935f | 347 | cache_put(ch, &ip_map_cache); |
1a9917c2 N |
348 | return 0; |
349 | } | |
1da177e4 | 350 | |
f15364bd | 351 | int auth_unix_add_addr(struct in6_addr *addr, struct auth_domain *dom) |
1da177e4 LT |
352 | { |
353 | struct unix_domain *udom; | |
1a9917c2 | 354 | struct ip_map *ipmp; |
1da177e4 | 355 | |
efc36aa5 | 356 | if (dom->flavour != &svcauth_unix) |
1da177e4 LT |
357 | return -EINVAL; |
358 | udom = container_of(dom, struct unix_domain, h); | |
1a9917c2 | 359 | ipmp = ip_map_lookup("nfsd", addr); |
1da177e4 | 360 | |
1a9917c2 N |
361 | if (ipmp) |
362 | return ip_map_update(ipmp, udom, NEVER); | |
363 | else | |
1da177e4 LT |
364 | return -ENOMEM; |
365 | } | |
24c3767e | 366 | EXPORT_SYMBOL_GPL(auth_unix_add_addr); |
1da177e4 LT |
367 | |
368 | int auth_unix_forget_old(struct auth_domain *dom) | |
369 | { | |
370 | struct unix_domain *udom; | |
cca5172a | 371 | |
efc36aa5 | 372 | if (dom->flavour != &svcauth_unix) |
1da177e4 LT |
373 | return -EINVAL; |
374 | udom = container_of(dom, struct unix_domain, h); | |
375 | udom->addr_changes++; | |
376 | return 0; | |
377 | } | |
24c3767e | 378 | EXPORT_SYMBOL_GPL(auth_unix_forget_old); |
1da177e4 | 379 | |
f15364bd | 380 | struct auth_domain *auth_unix_lookup(struct in6_addr *addr) |
1da177e4 | 381 | { |
40f10522 | 382 | struct ip_map *ipm; |
1da177e4 LT |
383 | struct auth_domain *rv; |
384 | ||
1a9917c2 | 385 | ipm = ip_map_lookup("nfsd", addr); |
1da177e4 LT |
386 | |
387 | if (!ipm) | |
388 | return NULL; | |
389 | if (cache_check(&ip_map_cache, &ipm->h, NULL)) | |
390 | return NULL; | |
391 | ||
392 | if ((ipm->m_client->addr_changes - ipm->m_add_change) >0) { | |
393 | if (test_and_set_bit(CACHE_NEGATIVE, &ipm->h.flags) == 0) | |
394 | auth_domain_put(&ipm->m_client->h); | |
395 | rv = NULL; | |
396 | } else { | |
397 | rv = &ipm->m_client->h; | |
efc36aa5 | 398 | kref_get(&rv->ref); |
1da177e4 | 399 | } |
baab935f | 400 | cache_put(&ipm->h, &ip_map_cache); |
1da177e4 LT |
401 | return rv; |
402 | } | |
24c3767e | 403 | EXPORT_SYMBOL_GPL(auth_unix_lookup); |
1da177e4 LT |
404 | |
405 | void svcauth_unix_purge(void) | |
406 | { | |
407 | cache_purge(&ip_map_cache); | |
1da177e4 | 408 | } |
24c3767e | 409 | EXPORT_SYMBOL_GPL(svcauth_unix_purge); |
1da177e4 | 410 | |
7b2b1fee GB |
411 | static inline struct ip_map * |
412 | ip_map_cached_get(struct svc_rqst *rqstp) | |
413 | { | |
def13d74 TT |
414 | struct ip_map *ipm = NULL; |
415 | struct svc_xprt *xprt = rqstp->rq_xprt; | |
416 | ||
417 | if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) { | |
418 | spin_lock(&xprt->xpt_lock); | |
419 | ipm = xprt->xpt_auth_cache; | |
420 | if (ipm != NULL) { | |
421 | if (!cache_valid(&ipm->h)) { | |
422 | /* | |
423 | * The entry has been invalidated since it was | |
424 | * remembered, e.g. by a second mount from the | |
425 | * same IP address. | |
426 | */ | |
427 | xprt->xpt_auth_cache = NULL; | |
428 | spin_unlock(&xprt->xpt_lock); | |
429 | cache_put(&ipm->h, &ip_map_cache); | |
430 | return NULL; | |
431 | } | |
432 | cache_get(&ipm->h); | |
7b2b1fee | 433 | } |
def13d74 | 434 | spin_unlock(&xprt->xpt_lock); |
7b2b1fee GB |
435 | } |
436 | return ipm; | |
437 | } | |
438 | ||
439 | static inline void | |
440 | ip_map_cached_put(struct svc_rqst *rqstp, struct ip_map *ipm) | |
441 | { | |
def13d74 TT |
442 | struct svc_xprt *xprt = rqstp->rq_xprt; |
443 | ||
444 | if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) { | |
445 | spin_lock(&xprt->xpt_lock); | |
446 | if (xprt->xpt_auth_cache == NULL) { | |
447 | /* newly cached, keep the reference */ | |
448 | xprt->xpt_auth_cache = ipm; | |
449 | ipm = NULL; | |
450 | } | |
451 | spin_unlock(&xprt->xpt_lock); | |
30f3deee | 452 | } |
30f3deee | 453 | if (ipm) |
7b2b1fee GB |
454 | cache_put(&ipm->h, &ip_map_cache); |
455 | } | |
456 | ||
457 | void | |
458 | svcauth_unix_info_release(void *info) | |
459 | { | |
460 | struct ip_map *ipm = info; | |
461 | cache_put(&ipm->h, &ip_map_cache); | |
462 | } | |
463 | ||
3fc605a2 N |
464 | /**************************************************************************** |
465 | * auth.unix.gid cache | |
466 | * simple cache to map a UID to a list of GIDs | |
467 | * because AUTH_UNIX aka AUTH_SYS has a max of 16 | |
468 | */ | |
469 | #define GID_HASHBITS 8 | |
470 | #define GID_HASHMAX (1<<GID_HASHBITS) | |
471 | #define GID_HASHMASK (GID_HASHMAX - 1) | |
472 | ||
473 | struct unix_gid { | |
474 | struct cache_head h; | |
475 | uid_t uid; | |
476 | struct group_info *gi; | |
477 | }; | |
478 | static struct cache_head *gid_table[GID_HASHMAX]; | |
479 | ||
480 | static void unix_gid_put(struct kref *kref) | |
481 | { | |
482 | struct cache_head *item = container_of(kref, struct cache_head, ref); | |
483 | struct unix_gid *ug = container_of(item, struct unix_gid, h); | |
484 | if (test_bit(CACHE_VALID, &item->flags) && | |
485 | !test_bit(CACHE_NEGATIVE, &item->flags)) | |
486 | put_group_info(ug->gi); | |
487 | kfree(ug); | |
488 | } | |
489 | ||
490 | static int unix_gid_match(struct cache_head *corig, struct cache_head *cnew) | |
491 | { | |
492 | struct unix_gid *orig = container_of(corig, struct unix_gid, h); | |
493 | struct unix_gid *new = container_of(cnew, struct unix_gid, h); | |
494 | return orig->uid == new->uid; | |
495 | } | |
496 | static void unix_gid_init(struct cache_head *cnew, struct cache_head *citem) | |
497 | { | |
498 | struct unix_gid *new = container_of(cnew, struct unix_gid, h); | |
499 | struct unix_gid *item = container_of(citem, struct unix_gid, h); | |
500 | new->uid = item->uid; | |
501 | } | |
502 | static void unix_gid_update(struct cache_head *cnew, struct cache_head *citem) | |
503 | { | |
504 | struct unix_gid *new = container_of(cnew, struct unix_gid, h); | |
505 | struct unix_gid *item = container_of(citem, struct unix_gid, h); | |
506 | ||
507 | get_group_info(item->gi); | |
508 | new->gi = item->gi; | |
509 | } | |
510 | static struct cache_head *unix_gid_alloc(void) | |
511 | { | |
512 | struct unix_gid *g = kmalloc(sizeof(*g), GFP_KERNEL); | |
513 | if (g) | |
514 | return &g->h; | |
515 | else | |
516 | return NULL; | |
517 | } | |
518 | ||
519 | static void unix_gid_request(struct cache_detail *cd, | |
520 | struct cache_head *h, | |
521 | char **bpp, int *blen) | |
522 | { | |
523 | char tuid[20]; | |
524 | struct unix_gid *ug = container_of(h, struct unix_gid, h); | |
525 | ||
526 | snprintf(tuid, 20, "%u", ug->uid); | |
527 | qword_add(bpp, blen, tuid); | |
528 | (*bpp)[-1] = '\n'; | |
529 | } | |
530 | ||
bc74b4f5 TM |
531 | static int unix_gid_upcall(struct cache_detail *cd, struct cache_head *h) |
532 | { | |
533 | return sunrpc_cache_pipe_upcall(cd, h, unix_gid_request); | |
534 | } | |
535 | ||
3fc605a2 N |
536 | static struct unix_gid *unix_gid_lookup(uid_t uid); |
537 | extern struct cache_detail unix_gid_cache; | |
538 | ||
539 | static int unix_gid_parse(struct cache_detail *cd, | |
540 | char *mesg, int mlen) | |
541 | { | |
542 | /* uid expiry Ngid gid0 gid1 ... gidN-1 */ | |
543 | int uid; | |
544 | int gids; | |
545 | int rv; | |
546 | int i; | |
547 | int err; | |
548 | time_t expiry; | |
549 | struct unix_gid ug, *ugp; | |
550 | ||
551 | if (mlen <= 0 || mesg[mlen-1] != '\n') | |
552 | return -EINVAL; | |
553 | mesg[mlen-1] = 0; | |
554 | ||
555 | rv = get_int(&mesg, &uid); | |
556 | if (rv) | |
557 | return -EINVAL; | |
558 | ug.uid = uid; | |
559 | ||
560 | expiry = get_expiry(&mesg); | |
561 | if (expiry == 0) | |
562 | return -EINVAL; | |
563 | ||
564 | rv = get_int(&mesg, &gids); | |
565 | if (rv || gids < 0 || gids > 8192) | |
566 | return -EINVAL; | |
567 | ||
568 | ug.gi = groups_alloc(gids); | |
569 | if (!ug.gi) | |
570 | return -ENOMEM; | |
571 | ||
572 | for (i = 0 ; i < gids ; i++) { | |
573 | int gid; | |
574 | rv = get_int(&mesg, &gid); | |
575 | err = -EINVAL; | |
576 | if (rv) | |
577 | goto out; | |
578 | GROUP_AT(ug.gi, i) = gid; | |
579 | } | |
580 | ||
581 | ugp = unix_gid_lookup(uid); | |
582 | if (ugp) { | |
583 | struct cache_head *ch; | |
584 | ug.h.flags = 0; | |
585 | ug.h.expiry_time = expiry; | |
586 | ch = sunrpc_cache_update(&unix_gid_cache, | |
587 | &ug.h, &ugp->h, | |
588 | hash_long(uid, GID_HASHBITS)); | |
589 | if (!ch) | |
590 | err = -ENOMEM; | |
591 | else { | |
592 | err = 0; | |
593 | cache_put(ch, &unix_gid_cache); | |
594 | } | |
595 | } else | |
596 | err = -ENOMEM; | |
597 | out: | |
598 | if (ug.gi) | |
599 | put_group_info(ug.gi); | |
600 | return err; | |
601 | } | |
602 | ||
603 | static int unix_gid_show(struct seq_file *m, | |
604 | struct cache_detail *cd, | |
605 | struct cache_head *h) | |
606 | { | |
607 | struct unix_gid *ug; | |
608 | int i; | |
609 | int glen; | |
610 | ||
611 | if (h == NULL) { | |
612 | seq_puts(m, "#uid cnt: gids...\n"); | |
613 | return 0; | |
614 | } | |
615 | ug = container_of(h, struct unix_gid, h); | |
616 | if (test_bit(CACHE_VALID, &h->flags) && | |
617 | !test_bit(CACHE_NEGATIVE, &h->flags)) | |
618 | glen = ug->gi->ngroups; | |
619 | else | |
620 | glen = 0; | |
621 | ||
622 | seq_printf(m, "%d %d:", ug->uid, glen); | |
623 | for (i = 0; i < glen; i++) | |
624 | seq_printf(m, " %d", GROUP_AT(ug->gi, i)); | |
625 | seq_printf(m, "\n"); | |
626 | return 0; | |
627 | } | |
628 | ||
629 | struct cache_detail unix_gid_cache = { | |
630 | .owner = THIS_MODULE, | |
631 | .hash_size = GID_HASHMAX, | |
632 | .hash_table = gid_table, | |
633 | .name = "auth.unix.gid", | |
634 | .cache_put = unix_gid_put, | |
bc74b4f5 | 635 | .cache_upcall = unix_gid_upcall, |
3fc605a2 N |
636 | .cache_parse = unix_gid_parse, |
637 | .cache_show = unix_gid_show, | |
638 | .match = unix_gid_match, | |
639 | .init = unix_gid_init, | |
640 | .update = unix_gid_update, | |
641 | .alloc = unix_gid_alloc, | |
642 | }; | |
643 | ||
644 | static struct unix_gid *unix_gid_lookup(uid_t uid) | |
645 | { | |
646 | struct unix_gid ug; | |
647 | struct cache_head *ch; | |
648 | ||
649 | ug.uid = uid; | |
650 | ch = sunrpc_cache_lookup(&unix_gid_cache, &ug.h, | |
651 | hash_long(uid, GID_HASHBITS)); | |
652 | if (ch) | |
653 | return container_of(ch, struct unix_gid, h); | |
654 | else | |
655 | return NULL; | |
656 | } | |
657 | ||
658 | static int unix_gid_find(uid_t uid, struct group_info **gip, | |
659 | struct svc_rqst *rqstp) | |
660 | { | |
661 | struct unix_gid *ug = unix_gid_lookup(uid); | |
662 | if (!ug) | |
663 | return -EAGAIN; | |
664 | switch (cache_check(&unix_gid_cache, &ug->h, &rqstp->rq_chandle)) { | |
665 | case -ENOENT: | |
666 | *gip = NULL; | |
667 | return 0; | |
668 | case 0: | |
669 | *gip = ug->gi; | |
670 | get_group_info(*gip); | |
560ab42e | 671 | cache_put(&ug->h, &unix_gid_cache); |
3fc605a2 N |
672 | return 0; |
673 | default: | |
674 | return -EAGAIN; | |
675 | } | |
676 | } | |
677 | ||
3ab4d8b1 | 678 | int |
1da177e4 LT |
679 | svcauth_unix_set_client(struct svc_rqst *rqstp) |
680 | { | |
f15364bd AC |
681 | struct sockaddr_in *sin; |
682 | struct sockaddr_in6 *sin6, sin6_storage; | |
1a9917c2 | 683 | struct ip_map *ipm; |
1da177e4 | 684 | |
f15364bd AC |
685 | switch (rqstp->rq_addr.ss_family) { |
686 | case AF_INET: | |
687 | sin = svc_addr_in(rqstp); | |
688 | sin6 = &sin6_storage; | |
689 | ipv6_addr_set(&sin6->sin6_addr, 0, 0, | |
690 | htonl(0x0000FFFF), sin->sin_addr.s_addr); | |
691 | break; | |
692 | case AF_INET6: | |
693 | sin6 = svc_addr_in6(rqstp); | |
694 | break; | |
695 | default: | |
696 | BUG(); | |
697 | } | |
698 | ||
1da177e4 LT |
699 | rqstp->rq_client = NULL; |
700 | if (rqstp->rq_proc == 0) | |
701 | return SVC_OK; | |
702 | ||
7b2b1fee GB |
703 | ipm = ip_map_cached_get(rqstp); |
704 | if (ipm == NULL) | |
705 | ipm = ip_map_lookup(rqstp->rq_server->sv_program->pg_class, | |
f15364bd | 706 | &sin6->sin6_addr); |
1da177e4 LT |
707 | |
708 | if (ipm == NULL) | |
709 | return SVC_DENIED; | |
710 | ||
711 | switch (cache_check(&ip_map_cache, &ipm->h, &rqstp->rq_chandle)) { | |
712 | default: | |
713 | BUG(); | |
714 | case -EAGAIN: | |
e0bb89ef | 715 | case -ETIMEDOUT: |
1da177e4 LT |
716 | return SVC_DROP; |
717 | case -ENOENT: | |
718 | return SVC_DENIED; | |
719 | case 0: | |
720 | rqstp->rq_client = &ipm->m_client->h; | |
efc36aa5 | 721 | kref_get(&rqstp->rq_client->ref); |
7b2b1fee | 722 | ip_map_cached_put(rqstp, ipm); |
1da177e4 LT |
723 | break; |
724 | } | |
725 | return SVC_OK; | |
726 | } | |
727 | ||
24c3767e | 728 | EXPORT_SYMBOL_GPL(svcauth_unix_set_client); |
3ab4d8b1 | 729 | |
1da177e4 | 730 | static int |
d8ed029d | 731 | svcauth_null_accept(struct svc_rqst *rqstp, __be32 *authp) |
1da177e4 LT |
732 | { |
733 | struct kvec *argv = &rqstp->rq_arg.head[0]; | |
734 | struct kvec *resv = &rqstp->rq_res.head[0]; | |
735 | struct svc_cred *cred = &rqstp->rq_cred; | |
736 | ||
737 | cred->cr_group_info = NULL; | |
738 | rqstp->rq_client = NULL; | |
739 | ||
740 | if (argv->iov_len < 3*4) | |
741 | return SVC_GARBAGE; | |
742 | ||
cca5172a | 743 | if (svc_getu32(argv) != 0) { |
1da177e4 LT |
744 | dprintk("svc: bad null cred\n"); |
745 | *authp = rpc_autherr_badcred; | |
746 | return SVC_DENIED; | |
747 | } | |
76994313 | 748 | if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) { |
1da177e4 LT |
749 | dprintk("svc: bad null verf\n"); |
750 | *authp = rpc_autherr_badverf; | |
751 | return SVC_DENIED; | |
752 | } | |
753 | ||
754 | /* Signal that mapping to nobody uid/gid is required */ | |
755 | cred->cr_uid = (uid_t) -1; | |
756 | cred->cr_gid = (gid_t) -1; | |
757 | cred->cr_group_info = groups_alloc(0); | |
758 | if (cred->cr_group_info == NULL) | |
759 | return SVC_DROP; /* kmalloc failure - client must retry */ | |
760 | ||
761 | /* Put NULL verifier */ | |
76994313 AD |
762 | svc_putnl(resv, RPC_AUTH_NULL); |
763 | svc_putnl(resv, 0); | |
1da177e4 | 764 | |
c4170583 | 765 | rqstp->rq_flavor = RPC_AUTH_NULL; |
1da177e4 LT |
766 | return SVC_OK; |
767 | } | |
768 | ||
769 | static int | |
770 | svcauth_null_release(struct svc_rqst *rqstp) | |
771 | { | |
772 | if (rqstp->rq_client) | |
773 | auth_domain_put(rqstp->rq_client); | |
774 | rqstp->rq_client = NULL; | |
775 | if (rqstp->rq_cred.cr_group_info) | |
776 | put_group_info(rqstp->rq_cred.cr_group_info); | |
777 | rqstp->rq_cred.cr_group_info = NULL; | |
778 | ||
779 | return 0; /* don't drop */ | |
780 | } | |
781 | ||
782 | ||
783 | struct auth_ops svcauth_null = { | |
784 | .name = "null", | |
785 | .owner = THIS_MODULE, | |
786 | .flavour = RPC_AUTH_NULL, | |
787 | .accept = svcauth_null_accept, | |
788 | .release = svcauth_null_release, | |
789 | .set_client = svcauth_unix_set_client, | |
790 | }; | |
791 | ||
792 | ||
793 | static int | |
d8ed029d | 794 | svcauth_unix_accept(struct svc_rqst *rqstp, __be32 *authp) |
1da177e4 LT |
795 | { |
796 | struct kvec *argv = &rqstp->rq_arg.head[0]; | |
797 | struct kvec *resv = &rqstp->rq_res.head[0]; | |
798 | struct svc_cred *cred = &rqstp->rq_cred; | |
799 | u32 slen, i; | |
800 | int len = argv->iov_len; | |
801 | ||
802 | cred->cr_group_info = NULL; | |
803 | rqstp->rq_client = NULL; | |
804 | ||
805 | if ((len -= 3*4) < 0) | |
806 | return SVC_GARBAGE; | |
807 | ||
808 | svc_getu32(argv); /* length */ | |
809 | svc_getu32(argv); /* time stamp */ | |
76994313 | 810 | slen = XDR_QUADLEN(svc_getnl(argv)); /* machname length */ |
1da177e4 LT |
811 | if (slen > 64 || (len -= (slen + 3)*4) < 0) |
812 | goto badcred; | |
d8ed029d | 813 | argv->iov_base = (void*)((__be32*)argv->iov_base + slen); /* skip machname */ |
1da177e4 LT |
814 | argv->iov_len -= slen*4; |
815 | ||
76994313 AD |
816 | cred->cr_uid = svc_getnl(argv); /* uid */ |
817 | cred->cr_gid = svc_getnl(argv); /* gid */ | |
818 | slen = svc_getnl(argv); /* gids length */ | |
1da177e4 LT |
819 | if (slen > 16 || (len -= (slen + 2)*4) < 0) |
820 | goto badcred; | |
3fc605a2 N |
821 | if (unix_gid_find(cred->cr_uid, &cred->cr_group_info, rqstp) |
822 | == -EAGAIN) | |
1da177e4 | 823 | return SVC_DROP; |
3fc605a2 N |
824 | if (cred->cr_group_info == NULL) { |
825 | cred->cr_group_info = groups_alloc(slen); | |
826 | if (cred->cr_group_info == NULL) | |
827 | return SVC_DROP; | |
828 | for (i = 0; i < slen; i++) | |
829 | GROUP_AT(cred->cr_group_info, i) = svc_getnl(argv); | |
830 | } else { | |
831 | for (i = 0; i < slen ; i++) | |
832 | svc_getnl(argv); | |
833 | } | |
76994313 | 834 | if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) { |
1da177e4 LT |
835 | *authp = rpc_autherr_badverf; |
836 | return SVC_DENIED; | |
837 | } | |
838 | ||
839 | /* Put NULL verifier */ | |
76994313 AD |
840 | svc_putnl(resv, RPC_AUTH_NULL); |
841 | svc_putnl(resv, 0); | |
1da177e4 | 842 | |
c4170583 | 843 | rqstp->rq_flavor = RPC_AUTH_UNIX; |
1da177e4 LT |
844 | return SVC_OK; |
845 | ||
846 | badcred: | |
847 | *authp = rpc_autherr_badcred; | |
848 | return SVC_DENIED; | |
849 | } | |
850 | ||
851 | static int | |
852 | svcauth_unix_release(struct svc_rqst *rqstp) | |
853 | { | |
854 | /* Verifier (such as it is) is already in place. | |
855 | */ | |
856 | if (rqstp->rq_client) | |
857 | auth_domain_put(rqstp->rq_client); | |
858 | rqstp->rq_client = NULL; | |
859 | if (rqstp->rq_cred.cr_group_info) | |
860 | put_group_info(rqstp->rq_cred.cr_group_info); | |
861 | rqstp->rq_cred.cr_group_info = NULL; | |
862 | ||
863 | return 0; | |
864 | } | |
865 | ||
866 | ||
867 | struct auth_ops svcauth_unix = { | |
868 | .name = "unix", | |
869 | .owner = THIS_MODULE, | |
870 | .flavour = RPC_AUTH_UNIX, | |
871 | .accept = svcauth_unix_accept, | |
872 | .release = svcauth_unix_release, | |
873 | .domain_release = svcauth_unix_domain_release, | |
874 | .set_client = svcauth_unix_set_client, | |
875 | }; | |
876 |