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