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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> |
5a0e3ad6 | 13 | #include <linux/slab.h> |
7b2b1fee | 14 | #include <net/sock.h> |
f15364bd AC |
15 | #include <net/ipv6.h> |
16 | #include <linux/kernel.h> | |
1da177e4 LT |
17 | #define RPCDBG_FACILITY RPCDBG_AUTH |
18 | ||
07396051 | 19 | #include <linux/sunrpc/clnt.h> |
1da177e4 LT |
20 | |
21 | /* | |
22 | * AUTHUNIX and AUTHNULL credentials are both handled here. | |
23 | * AUTHNULL is treated just like AUTHUNIX except that the uid/gid | |
24 | * are always nobody (-2). i.e. we do the same IP address checks for | |
25 | * AUTHNULL as for AUTHUNIX, and that is done here. | |
26 | */ | |
27 | ||
28 | ||
1da177e4 LT |
29 | struct unix_domain { |
30 | struct auth_domain h; | |
31 | int addr_changes; | |
32 | /* other stuff later */ | |
33 | }; | |
34 | ||
efc36aa5 N |
35 | extern struct auth_ops svcauth_unix; |
36 | ||
1da177e4 LT |
37 | struct auth_domain *unix_domain_find(char *name) |
38 | { | |
efc36aa5 N |
39 | struct auth_domain *rv; |
40 | struct unix_domain *new = NULL; | |
41 | ||
42 | rv = auth_domain_lookup(name, NULL); | |
43 | while(1) { | |
ad1b5229 N |
44 | if (rv) { |
45 | if (new && rv != &new->h) | |
46 | auth_domain_put(&new->h); | |
47 | ||
48 | if (rv->flavour != &svcauth_unix) { | |
49 | auth_domain_put(rv); | |
50 | return NULL; | |
51 | } | |
efc36aa5 N |
52 | return rv; |
53 | } | |
efc36aa5 N |
54 | |
55 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
56 | if (new == NULL) | |
57 | return NULL; | |
58 | kref_init(&new->h.ref); | |
59 | new->h.name = kstrdup(name, GFP_KERNEL); | |
dd08d6ea N |
60 | if (new->h.name == NULL) { |
61 | kfree(new); | |
62 | return NULL; | |
63 | } | |
efc36aa5 N |
64 | new->h.flavour = &svcauth_unix; |
65 | new->addr_changes = 0; | |
66 | rv = auth_domain_lookup(name, &new->h); | |
1da177e4 | 67 | } |
1da177e4 | 68 | } |
24c3767e | 69 | EXPORT_SYMBOL_GPL(unix_domain_find); |
1da177e4 LT |
70 | |
71 | static void svcauth_unix_domain_release(struct auth_domain *dom) | |
72 | { | |
73 | struct unix_domain *ud = container_of(dom, struct unix_domain, h); | |
74 | ||
75 | kfree(dom->name); | |
76 | kfree(ud); | |
77 | } | |
78 | ||
79 | ||
80 | /************************************************** | |
81 | * cache for IP address to unix_domain | |
82 | * as needed by AUTH_UNIX | |
83 | */ | |
84 | #define IP_HASHBITS 8 | |
85 | #define IP_HASHMAX (1<<IP_HASHBITS) | |
86 | #define IP_HASHMASK (IP_HASHMAX-1) | |
87 | ||
88 | struct ip_map { | |
89 | struct cache_head h; | |
90 | char m_class[8]; /* e.g. "nfsd" */ | |
f15364bd | 91 | struct in6_addr m_addr; |
1da177e4 LT |
92 | struct unix_domain *m_client; |
93 | int m_add_change; | |
94 | }; | |
95 | static struct cache_head *ip_table[IP_HASHMAX]; | |
96 | ||
baab935f | 97 | static void ip_map_put(struct kref *kref) |
1da177e4 | 98 | { |
baab935f | 99 | struct cache_head *item = container_of(kref, struct cache_head, ref); |
1da177e4 | 100 | struct ip_map *im = container_of(item, struct ip_map,h); |
baab935f N |
101 | |
102 | if (test_bit(CACHE_VALID, &item->flags) && | |
103 | !test_bit(CACHE_NEGATIVE, &item->flags)) | |
104 | auth_domain_put(&im->m_client->h); | |
105 | kfree(im); | |
1da177e4 LT |
106 | } |
107 | ||
1f1e030b N |
108 | #if IP_HASHBITS == 8 |
109 | /* hash_long on a 64 bit machine is currently REALLY BAD for | |
110 | * IP addresses in reverse-endian (i.e. on a little-endian machine). | |
111 | * So use a trivial but reliable hash instead | |
112 | */ | |
4806126d | 113 | static inline int hash_ip(__be32 ip) |
1f1e030b | 114 | { |
4806126d | 115 | int hash = (__force u32)ip ^ ((__force u32)ip>>16); |
1f1e030b N |
116 | return (hash ^ (hash>>8)) & 0xff; |
117 | } | |
118 | #endif | |
f15364bd AC |
119 | static inline int hash_ip6(struct in6_addr ip) |
120 | { | |
121 | return (hash_ip(ip.s6_addr32[0]) ^ | |
122 | hash_ip(ip.s6_addr32[1]) ^ | |
123 | hash_ip(ip.s6_addr32[2]) ^ | |
124 | hash_ip(ip.s6_addr32[3])); | |
125 | } | |
1a9917c2 | 126 | static int ip_map_match(struct cache_head *corig, struct cache_head *cnew) |
1da177e4 | 127 | { |
1a9917c2 N |
128 | struct ip_map *orig = container_of(corig, struct ip_map, h); |
129 | struct ip_map *new = container_of(cnew, struct ip_map, h); | |
f64f9e71 JP |
130 | return strcmp(orig->m_class, new->m_class) == 0 && |
131 | ipv6_addr_equal(&orig->m_addr, &new->m_addr); | |
1da177e4 | 132 | } |
1a9917c2 | 133 | static void ip_map_init(struct cache_head *cnew, struct cache_head *citem) |
1da177e4 | 134 | { |
1a9917c2 N |
135 | struct ip_map *new = container_of(cnew, struct ip_map, h); |
136 | struct ip_map *item = container_of(citem, struct ip_map, h); | |
137 | ||
1da177e4 | 138 | strcpy(new->m_class, item->m_class); |
f15364bd | 139 | ipv6_addr_copy(&new->m_addr, &item->m_addr); |
1da177e4 | 140 | } |
1a9917c2 | 141 | static void update(struct cache_head *cnew, struct cache_head *citem) |
1da177e4 | 142 | { |
1a9917c2 N |
143 | struct ip_map *new = container_of(cnew, struct ip_map, h); |
144 | struct ip_map *item = container_of(citem, struct ip_map, h); | |
145 | ||
efc36aa5 | 146 | kref_get(&item->m_client->h.ref); |
1da177e4 LT |
147 | new->m_client = item->m_client; |
148 | new->m_add_change = item->m_add_change; | |
149 | } | |
1a9917c2 N |
150 | static struct cache_head *ip_map_alloc(void) |
151 | { | |
152 | struct ip_map *i = kmalloc(sizeof(*i), GFP_KERNEL); | |
153 | if (i) | |
154 | return &i->h; | |
155 | else | |
156 | return NULL; | |
157 | } | |
1da177e4 LT |
158 | |
159 | static void ip_map_request(struct cache_detail *cd, | |
160 | struct cache_head *h, | |
161 | char **bpp, int *blen) | |
162 | { | |
f15364bd | 163 | char text_addr[40]; |
1da177e4 | 164 | struct ip_map *im = container_of(h, struct ip_map, h); |
1da177e4 | 165 | |
f15364bd | 166 | if (ipv6_addr_v4mapped(&(im->m_addr))) { |
21454aaa | 167 | snprintf(text_addr, 20, "%pI4", &im->m_addr.s6_addr32[3]); |
f15364bd | 168 | } else { |
5b095d98 | 169 | snprintf(text_addr, 40, "%pI6", &im->m_addr); |
f15364bd | 170 | } |
1da177e4 LT |
171 | qword_add(bpp, blen, im->m_class); |
172 | qword_add(bpp, blen, text_addr); | |
173 | (*bpp)[-1] = '\n'; | |
174 | } | |
175 | ||
bc74b4f5 TM |
176 | static int ip_map_upcall(struct cache_detail *cd, struct cache_head *h) |
177 | { | |
178 | return sunrpc_cache_pipe_upcall(cd, h, ip_map_request); | |
179 | } | |
180 | ||
bf18ab32 PE |
181 | static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, struct in6_addr *addr); |
182 | static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm, struct unix_domain *udom, time_t expiry); | |
1da177e4 LT |
183 | |
184 | static int ip_map_parse(struct cache_detail *cd, | |
185 | char *mesg, int mlen) | |
186 | { | |
187 | /* class ipaddress [domainname] */ | |
188 | /* should be safe just to use the start of the input buffer | |
189 | * for scratch: */ | |
190 | char *buf = mesg; | |
191 | int len; | |
1a9917c2 | 192 | char class[8]; |
07396051 CL |
193 | union { |
194 | struct sockaddr sa; | |
195 | struct sockaddr_in s4; | |
196 | struct sockaddr_in6 s6; | |
197 | } address; | |
198 | struct sockaddr_in6 sin6; | |
1a9917c2 N |
199 | int err; |
200 | ||
201 | struct ip_map *ipmp; | |
1da177e4 LT |
202 | struct auth_domain *dom; |
203 | time_t expiry; | |
204 | ||
205 | if (mesg[mlen-1] != '\n') | |
206 | return -EINVAL; | |
207 | mesg[mlen-1] = 0; | |
208 | ||
209 | /* class */ | |
1a9917c2 | 210 | len = qword_get(&mesg, class, sizeof(class)); |
1da177e4 LT |
211 | if (len <= 0) return -EINVAL; |
212 | ||
213 | /* ip address */ | |
214 | len = qword_get(&mesg, buf, mlen); | |
215 | if (len <= 0) return -EINVAL; | |
216 | ||
07396051 | 217 | if (rpc_pton(buf, len, &address.sa, sizeof(address)) == 0) |
1da177e4 | 218 | return -EINVAL; |
07396051 CL |
219 | switch (address.sa.sa_family) { |
220 | case AF_INET: | |
221 | /* Form a mapped IPv4 address in sin6 */ | |
222 | memset(&sin6, 0, sizeof(sin6)); | |
223 | sin6.sin6_family = AF_INET6; | |
224 | sin6.sin6_addr.s6_addr32[2] = htonl(0xffff); | |
225 | sin6.sin6_addr.s6_addr32[3] = address.s4.sin_addr.s_addr; | |
226 | break; | |
227 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
228 | case AF_INET6: | |
229 | memcpy(&sin6, &address.s6, sizeof(sin6)); | |
230 | break; | |
231 | #endif | |
232 | default: | |
233 | return -EINVAL; | |
234 | } | |
cca5172a | 235 | |
1da177e4 LT |
236 | expiry = get_expiry(&mesg); |
237 | if (expiry ==0) | |
238 | return -EINVAL; | |
239 | ||
240 | /* domainname, or empty for NEGATIVE */ | |
241 | len = qword_get(&mesg, buf, mlen); | |
242 | if (len < 0) return -EINVAL; | |
243 | ||
244 | if (len) { | |
245 | dom = unix_domain_find(buf); | |
246 | if (dom == NULL) | |
247 | return -ENOENT; | |
248 | } else | |
249 | dom = NULL; | |
250 | ||
07396051 | 251 | /* IPv6 scope IDs are ignored for now */ |
bf18ab32 | 252 | ipmp = __ip_map_lookup(cd, class, &sin6.sin6_addr); |
1a9917c2 | 253 | if (ipmp) { |
bf18ab32 | 254 | err = __ip_map_update(cd, ipmp, |
1a9917c2 N |
255 | container_of(dom, struct unix_domain, h), |
256 | expiry); | |
1da177e4 | 257 | } else |
1a9917c2 | 258 | err = -ENOMEM; |
1da177e4 | 259 | |
1da177e4 LT |
260 | if (dom) |
261 | auth_domain_put(dom); | |
1a9917c2 | 262 | |
1da177e4 | 263 | cache_flush(); |
1a9917c2 | 264 | return err; |
1da177e4 LT |
265 | } |
266 | ||
267 | static int ip_map_show(struct seq_file *m, | |
268 | struct cache_detail *cd, | |
269 | struct cache_head *h) | |
270 | { | |
271 | struct ip_map *im; | |
f15364bd | 272 | struct in6_addr addr; |
1da177e4 LT |
273 | char *dom = "-no-domain-"; |
274 | ||
275 | if (h == NULL) { | |
276 | seq_puts(m, "#class IP domain\n"); | |
277 | return 0; | |
278 | } | |
279 | im = container_of(h, struct ip_map, h); | |
280 | /* class addr domain */ | |
f15364bd | 281 | ipv6_addr_copy(&addr, &im->m_addr); |
1da177e4 | 282 | |
cca5172a | 283 | if (test_bit(CACHE_VALID, &h->flags) && |
1da177e4 LT |
284 | !test_bit(CACHE_NEGATIVE, &h->flags)) |
285 | dom = im->m_client->h.name; | |
286 | ||
f15364bd | 287 | if (ipv6_addr_v4mapped(&addr)) { |
21454aaa HH |
288 | seq_printf(m, "%s %pI4 %s\n", |
289 | im->m_class, &addr.s6_addr32[3], dom); | |
f15364bd | 290 | } else { |
5b095d98 | 291 | seq_printf(m, "%s %pI6 %s\n", im->m_class, &addr, dom); |
f15364bd | 292 | } |
1da177e4 LT |
293 | return 0; |
294 | } | |
cca5172a | 295 | |
1da177e4 LT |
296 | |
297 | struct cache_detail ip_map_cache = { | |
f35279d3 | 298 | .owner = THIS_MODULE, |
1da177e4 LT |
299 | .hash_size = IP_HASHMAX, |
300 | .hash_table = ip_table, | |
301 | .name = "auth.unix.ip", | |
302 | .cache_put = ip_map_put, | |
bc74b4f5 | 303 | .cache_upcall = ip_map_upcall, |
1da177e4 LT |
304 | .cache_parse = ip_map_parse, |
305 | .cache_show = ip_map_show, | |
1a9917c2 N |
306 | .match = ip_map_match, |
307 | .init = ip_map_init, | |
308 | .update = update, | |
309 | .alloc = ip_map_alloc, | |
1da177e4 LT |
310 | }; |
311 | ||
bf18ab32 PE |
312 | static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, |
313 | struct in6_addr *addr) | |
1a9917c2 N |
314 | { |
315 | struct ip_map ip; | |
316 | struct cache_head *ch; | |
317 | ||
318 | strcpy(ip.m_class, class); | |
f15364bd | 319 | ipv6_addr_copy(&ip.m_addr, addr); |
bf18ab32 | 320 | ch = sunrpc_cache_lookup(cd, &ip.h, |
1a9917c2 | 321 | hash_str(class, IP_HASHBITS) ^ |
f15364bd | 322 | hash_ip6(*addr)); |
1a9917c2 N |
323 | |
324 | if (ch) | |
325 | return container_of(ch, struct ip_map, h); | |
326 | else | |
327 | return NULL; | |
328 | } | |
1da177e4 | 329 | |
352114f3 PE |
330 | static inline struct ip_map *ip_map_lookup(struct net *net, char *class, |
331 | struct in6_addr *addr) | |
bf18ab32 PE |
332 | { |
333 | return __ip_map_lookup(&ip_map_cache, class, addr); | |
334 | } | |
335 | ||
336 | static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm, | |
337 | struct unix_domain *udom, time_t expiry) | |
1a9917c2 N |
338 | { |
339 | struct ip_map ip; | |
340 | struct cache_head *ch; | |
341 | ||
342 | ip.m_client = udom; | |
343 | ip.h.flags = 0; | |
344 | if (!udom) | |
345 | set_bit(CACHE_NEGATIVE, &ip.h.flags); | |
346 | else { | |
347 | ip.m_add_change = udom->addr_changes; | |
348 | /* if this is from the legacy set_client system call, | |
349 | * we need m_add_change to be one higher | |
350 | */ | |
351 | if (expiry == NEVER) | |
352 | ip.m_add_change++; | |
353 | } | |
354 | ip.h.expiry_time = expiry; | |
bf18ab32 | 355 | ch = sunrpc_cache_update(cd, &ip.h, &ipm->h, |
1a9917c2 | 356 | hash_str(ipm->m_class, IP_HASHBITS) ^ |
f15364bd | 357 | hash_ip6(ipm->m_addr)); |
1a9917c2 N |
358 | if (!ch) |
359 | return -ENOMEM; | |
bf18ab32 | 360 | cache_put(ch, cd); |
1a9917c2 N |
361 | return 0; |
362 | } | |
1da177e4 | 363 | |
352114f3 PE |
364 | static inline int ip_map_update(struct net *net, struct ip_map *ipm, |
365 | struct unix_domain *udom, time_t expiry) | |
bf18ab32 PE |
366 | { |
367 | return __ip_map_update(&ip_map_cache, ipm, udom, expiry); | |
368 | } | |
369 | ||
352114f3 | 370 | int auth_unix_add_addr(struct net *net, struct in6_addr *addr, struct auth_domain *dom) |
1da177e4 LT |
371 | { |
372 | struct unix_domain *udom; | |
1a9917c2 | 373 | struct ip_map *ipmp; |
1da177e4 | 374 | |
efc36aa5 | 375 | if (dom->flavour != &svcauth_unix) |
1da177e4 LT |
376 | return -EINVAL; |
377 | udom = container_of(dom, struct unix_domain, h); | |
352114f3 | 378 | ipmp = ip_map_lookup(net, "nfsd", addr); |
1da177e4 | 379 | |
1a9917c2 | 380 | if (ipmp) |
352114f3 | 381 | return ip_map_update(net, ipmp, udom, NEVER); |
1a9917c2 | 382 | else |
1da177e4 LT |
383 | return -ENOMEM; |
384 | } | |
24c3767e | 385 | EXPORT_SYMBOL_GPL(auth_unix_add_addr); |
1da177e4 LT |
386 | |
387 | int auth_unix_forget_old(struct auth_domain *dom) | |
388 | { | |
389 | struct unix_domain *udom; | |
cca5172a | 390 | |
efc36aa5 | 391 | if (dom->flavour != &svcauth_unix) |
1da177e4 LT |
392 | return -EINVAL; |
393 | udom = container_of(dom, struct unix_domain, h); | |
394 | udom->addr_changes++; | |
395 | return 0; | |
396 | } | |
24c3767e | 397 | EXPORT_SYMBOL_GPL(auth_unix_forget_old); |
1da177e4 | 398 | |
352114f3 | 399 | struct auth_domain *auth_unix_lookup(struct net *net, struct in6_addr *addr) |
1da177e4 | 400 | { |
40f10522 | 401 | struct ip_map *ipm; |
1da177e4 LT |
402 | struct auth_domain *rv; |
403 | ||
352114f3 | 404 | ipm = ip_map_lookup(net, "nfsd", addr); |
1da177e4 LT |
405 | |
406 | if (!ipm) | |
407 | return NULL; | |
408 | if (cache_check(&ip_map_cache, &ipm->h, NULL)) | |
409 | return NULL; | |
410 | ||
411 | if ((ipm->m_client->addr_changes - ipm->m_add_change) >0) { | |
412 | if (test_and_set_bit(CACHE_NEGATIVE, &ipm->h.flags) == 0) | |
413 | auth_domain_put(&ipm->m_client->h); | |
414 | rv = NULL; | |
415 | } else { | |
416 | rv = &ipm->m_client->h; | |
efc36aa5 | 417 | kref_get(&rv->ref); |
1da177e4 | 418 | } |
baab935f | 419 | cache_put(&ipm->h, &ip_map_cache); |
1da177e4 LT |
420 | return rv; |
421 | } | |
24c3767e | 422 | EXPORT_SYMBOL_GPL(auth_unix_lookup); |
1da177e4 LT |
423 | |
424 | void svcauth_unix_purge(void) | |
425 | { | |
426 | cache_purge(&ip_map_cache); | |
1da177e4 | 427 | } |
24c3767e | 428 | EXPORT_SYMBOL_GPL(svcauth_unix_purge); |
1da177e4 | 429 | |
7b2b1fee | 430 | static inline struct ip_map * |
3be4479f | 431 | ip_map_cached_get(struct svc_xprt *xprt) |
7b2b1fee | 432 | { |
def13d74 | 433 | struct ip_map *ipm = NULL; |
def13d74 TT |
434 | |
435 | if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) { | |
436 | spin_lock(&xprt->xpt_lock); | |
437 | ipm = xprt->xpt_auth_cache; | |
438 | if (ipm != NULL) { | |
439 | if (!cache_valid(&ipm->h)) { | |
440 | /* | |
441 | * The entry has been invalidated since it was | |
442 | * remembered, e.g. by a second mount from the | |
443 | * same IP address. | |
444 | */ | |
445 | xprt->xpt_auth_cache = NULL; | |
446 | spin_unlock(&xprt->xpt_lock); | |
447 | cache_put(&ipm->h, &ip_map_cache); | |
448 | return NULL; | |
449 | } | |
450 | cache_get(&ipm->h); | |
7b2b1fee | 451 | } |
def13d74 | 452 | spin_unlock(&xprt->xpt_lock); |
7b2b1fee GB |
453 | } |
454 | return ipm; | |
455 | } | |
456 | ||
457 | static inline void | |
3be4479f | 458 | ip_map_cached_put(struct svc_xprt *xprt, struct ip_map *ipm) |
7b2b1fee | 459 | { |
def13d74 TT |
460 | if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) { |
461 | spin_lock(&xprt->xpt_lock); | |
462 | if (xprt->xpt_auth_cache == NULL) { | |
463 | /* newly cached, keep the reference */ | |
464 | xprt->xpt_auth_cache = ipm; | |
465 | ipm = NULL; | |
466 | } | |
467 | spin_unlock(&xprt->xpt_lock); | |
30f3deee | 468 | } |
30f3deee | 469 | if (ipm) |
7b2b1fee GB |
470 | cache_put(&ipm->h, &ip_map_cache); |
471 | } | |
472 | ||
473 | void | |
e3bfca01 | 474 | svcauth_unix_info_release(struct svc_xprt *xpt) |
7b2b1fee | 475 | { |
e3bfca01 PE |
476 | struct ip_map *ipm; |
477 | ||
478 | ipm = xpt->xpt_auth_cache; | |
479 | if (ipm != NULL) | |
480 | cache_put(&ipm->h, &ip_map_cache); | |
7b2b1fee GB |
481 | } |
482 | ||
3fc605a2 N |
483 | /**************************************************************************** |
484 | * auth.unix.gid cache | |
485 | * simple cache to map a UID to a list of GIDs | |
486 | * because AUTH_UNIX aka AUTH_SYS has a max of 16 | |
487 | */ | |
488 | #define GID_HASHBITS 8 | |
489 | #define GID_HASHMAX (1<<GID_HASHBITS) | |
490 | #define GID_HASHMASK (GID_HASHMAX - 1) | |
491 | ||
492 | struct unix_gid { | |
493 | struct cache_head h; | |
494 | uid_t uid; | |
495 | struct group_info *gi; | |
496 | }; | |
497 | static struct cache_head *gid_table[GID_HASHMAX]; | |
498 | ||
499 | static void unix_gid_put(struct kref *kref) | |
500 | { | |
501 | struct cache_head *item = container_of(kref, struct cache_head, ref); | |
502 | struct unix_gid *ug = container_of(item, struct unix_gid, h); | |
503 | if (test_bit(CACHE_VALID, &item->flags) && | |
504 | !test_bit(CACHE_NEGATIVE, &item->flags)) | |
505 | put_group_info(ug->gi); | |
506 | kfree(ug); | |
507 | } | |
508 | ||
509 | static int unix_gid_match(struct cache_head *corig, struct cache_head *cnew) | |
510 | { | |
511 | struct unix_gid *orig = container_of(corig, struct unix_gid, h); | |
512 | struct unix_gid *new = container_of(cnew, struct unix_gid, h); | |
513 | return orig->uid == new->uid; | |
514 | } | |
515 | static void unix_gid_init(struct cache_head *cnew, struct cache_head *citem) | |
516 | { | |
517 | struct unix_gid *new = container_of(cnew, struct unix_gid, h); | |
518 | struct unix_gid *item = container_of(citem, struct unix_gid, h); | |
519 | new->uid = item->uid; | |
520 | } | |
521 | static void unix_gid_update(struct cache_head *cnew, struct cache_head *citem) | |
522 | { | |
523 | struct unix_gid *new = container_of(cnew, struct unix_gid, h); | |
524 | struct unix_gid *item = container_of(citem, struct unix_gid, h); | |
525 | ||
526 | get_group_info(item->gi); | |
527 | new->gi = item->gi; | |
528 | } | |
529 | static struct cache_head *unix_gid_alloc(void) | |
530 | { | |
531 | struct unix_gid *g = kmalloc(sizeof(*g), GFP_KERNEL); | |
532 | if (g) | |
533 | return &g->h; | |
534 | else | |
535 | return NULL; | |
536 | } | |
537 | ||
538 | static void unix_gid_request(struct cache_detail *cd, | |
539 | struct cache_head *h, | |
540 | char **bpp, int *blen) | |
541 | { | |
542 | char tuid[20]; | |
543 | struct unix_gid *ug = container_of(h, struct unix_gid, h); | |
544 | ||
545 | snprintf(tuid, 20, "%u", ug->uid); | |
546 | qword_add(bpp, blen, tuid); | |
547 | (*bpp)[-1] = '\n'; | |
548 | } | |
549 | ||
bc74b4f5 TM |
550 | static int unix_gid_upcall(struct cache_detail *cd, struct cache_head *h) |
551 | { | |
552 | return sunrpc_cache_pipe_upcall(cd, h, unix_gid_request); | |
553 | } | |
554 | ||
3fc605a2 N |
555 | static struct unix_gid *unix_gid_lookup(uid_t uid); |
556 | extern struct cache_detail unix_gid_cache; | |
557 | ||
558 | static int unix_gid_parse(struct cache_detail *cd, | |
559 | char *mesg, int mlen) | |
560 | { | |
561 | /* uid expiry Ngid gid0 gid1 ... gidN-1 */ | |
562 | int uid; | |
563 | int gids; | |
564 | int rv; | |
565 | int i; | |
566 | int err; | |
567 | time_t expiry; | |
568 | struct unix_gid ug, *ugp; | |
569 | ||
570 | if (mlen <= 0 || mesg[mlen-1] != '\n') | |
571 | return -EINVAL; | |
572 | mesg[mlen-1] = 0; | |
573 | ||
574 | rv = get_int(&mesg, &uid); | |
575 | if (rv) | |
576 | return -EINVAL; | |
577 | ug.uid = uid; | |
578 | ||
579 | expiry = get_expiry(&mesg); | |
580 | if (expiry == 0) | |
581 | return -EINVAL; | |
582 | ||
583 | rv = get_int(&mesg, &gids); | |
584 | if (rv || gids < 0 || gids > 8192) | |
585 | return -EINVAL; | |
586 | ||
587 | ug.gi = groups_alloc(gids); | |
588 | if (!ug.gi) | |
589 | return -ENOMEM; | |
590 | ||
591 | for (i = 0 ; i < gids ; i++) { | |
592 | int gid; | |
593 | rv = get_int(&mesg, &gid); | |
594 | err = -EINVAL; | |
595 | if (rv) | |
596 | goto out; | |
597 | GROUP_AT(ug.gi, i) = gid; | |
598 | } | |
599 | ||
600 | ugp = unix_gid_lookup(uid); | |
601 | if (ugp) { | |
602 | struct cache_head *ch; | |
603 | ug.h.flags = 0; | |
604 | ug.h.expiry_time = expiry; | |
605 | ch = sunrpc_cache_update(&unix_gid_cache, | |
606 | &ug.h, &ugp->h, | |
607 | hash_long(uid, GID_HASHBITS)); | |
608 | if (!ch) | |
609 | err = -ENOMEM; | |
610 | else { | |
611 | err = 0; | |
612 | cache_put(ch, &unix_gid_cache); | |
613 | } | |
614 | } else | |
615 | err = -ENOMEM; | |
616 | out: | |
617 | if (ug.gi) | |
618 | put_group_info(ug.gi); | |
619 | return err; | |
620 | } | |
621 | ||
622 | static int unix_gid_show(struct seq_file *m, | |
623 | struct cache_detail *cd, | |
624 | struct cache_head *h) | |
625 | { | |
626 | struct unix_gid *ug; | |
627 | int i; | |
628 | int glen; | |
629 | ||
630 | if (h == NULL) { | |
631 | seq_puts(m, "#uid cnt: gids...\n"); | |
632 | return 0; | |
633 | } | |
634 | ug = container_of(h, struct unix_gid, h); | |
635 | if (test_bit(CACHE_VALID, &h->flags) && | |
636 | !test_bit(CACHE_NEGATIVE, &h->flags)) | |
637 | glen = ug->gi->ngroups; | |
638 | else | |
639 | glen = 0; | |
640 | ||
ccdb357c | 641 | seq_printf(m, "%u %d:", ug->uid, glen); |
3fc605a2 N |
642 | for (i = 0; i < glen; i++) |
643 | seq_printf(m, " %d", GROUP_AT(ug->gi, i)); | |
644 | seq_printf(m, "\n"); | |
645 | return 0; | |
646 | } | |
647 | ||
648 | struct cache_detail unix_gid_cache = { | |
649 | .owner = THIS_MODULE, | |
650 | .hash_size = GID_HASHMAX, | |
651 | .hash_table = gid_table, | |
652 | .name = "auth.unix.gid", | |
653 | .cache_put = unix_gid_put, | |
bc74b4f5 | 654 | .cache_upcall = unix_gid_upcall, |
3fc605a2 N |
655 | .cache_parse = unix_gid_parse, |
656 | .cache_show = unix_gid_show, | |
657 | .match = unix_gid_match, | |
658 | .init = unix_gid_init, | |
659 | .update = unix_gid_update, | |
660 | .alloc = unix_gid_alloc, | |
661 | }; | |
662 | ||
663 | static struct unix_gid *unix_gid_lookup(uid_t uid) | |
664 | { | |
665 | struct unix_gid ug; | |
666 | struct cache_head *ch; | |
667 | ||
668 | ug.uid = uid; | |
669 | ch = sunrpc_cache_lookup(&unix_gid_cache, &ug.h, | |
670 | hash_long(uid, GID_HASHBITS)); | |
671 | if (ch) | |
672 | return container_of(ch, struct unix_gid, h); | |
673 | else | |
674 | return NULL; | |
675 | } | |
676 | ||
dc83d6e2 | 677 | static struct group_info *unix_gid_find(uid_t uid, struct svc_rqst *rqstp) |
3fc605a2 | 678 | { |
dc83d6e2 BF |
679 | struct unix_gid *ug; |
680 | struct group_info *gi; | |
681 | int ret; | |
682 | ||
683 | ug = unix_gid_lookup(uid); | |
3fc605a2 | 684 | if (!ug) |
dc83d6e2 BF |
685 | return ERR_PTR(-EAGAIN); |
686 | ret = cache_check(&unix_gid_cache, &ug->h, &rqstp->rq_chandle); | |
687 | switch (ret) { | |
3fc605a2 | 688 | case -ENOENT: |
dc83d6e2 | 689 | return ERR_PTR(-ENOENT); |
1ebede86 N |
690 | case -ETIMEDOUT: |
691 | return ERR_PTR(-ESHUTDOWN); | |
3fc605a2 | 692 | case 0: |
dc83d6e2 | 693 | gi = get_group_info(ug->gi); |
560ab42e | 694 | cache_put(&ug->h, &unix_gid_cache); |
dc83d6e2 | 695 | return gi; |
3fc605a2 | 696 | default: |
dc83d6e2 | 697 | return ERR_PTR(-EAGAIN); |
3fc605a2 N |
698 | } |
699 | } | |
700 | ||
3ab4d8b1 | 701 | int |
1da177e4 LT |
702 | svcauth_unix_set_client(struct svc_rqst *rqstp) |
703 | { | |
f15364bd AC |
704 | struct sockaddr_in *sin; |
705 | struct sockaddr_in6 *sin6, sin6_storage; | |
1a9917c2 | 706 | struct ip_map *ipm; |
dc83d6e2 BF |
707 | struct group_info *gi; |
708 | struct svc_cred *cred = &rqstp->rq_cred; | |
3be4479f | 709 | struct svc_xprt *xprt = rqstp->rq_xprt; |
1da177e4 | 710 | |
f15364bd AC |
711 | switch (rqstp->rq_addr.ss_family) { |
712 | case AF_INET: | |
713 | sin = svc_addr_in(rqstp); | |
714 | sin6 = &sin6_storage; | |
b301e82c | 715 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &sin6->sin6_addr); |
f15364bd AC |
716 | break; |
717 | case AF_INET6: | |
718 | sin6 = svc_addr_in6(rqstp); | |
719 | break; | |
720 | default: | |
721 | BUG(); | |
722 | } | |
723 | ||
1da177e4 LT |
724 | rqstp->rq_client = NULL; |
725 | if (rqstp->rq_proc == 0) | |
726 | return SVC_OK; | |
727 | ||
3be4479f | 728 | ipm = ip_map_cached_get(xprt); |
7b2b1fee | 729 | if (ipm == NULL) |
352114f3 | 730 | ipm = ip_map_lookup(&init_net, rqstp->rq_server->sv_program->pg_class, |
f15364bd | 731 | &sin6->sin6_addr); |
1da177e4 LT |
732 | |
733 | if (ipm == NULL) | |
734 | return SVC_DENIED; | |
735 | ||
736 | switch (cache_check(&ip_map_cache, &ipm->h, &rqstp->rq_chandle)) { | |
737 | default: | |
738 | BUG(); | |
e0bb89ef | 739 | case -ETIMEDOUT: |
1ebede86 N |
740 | return SVC_CLOSE; |
741 | case -EAGAIN: | |
1da177e4 LT |
742 | return SVC_DROP; |
743 | case -ENOENT: | |
744 | return SVC_DENIED; | |
745 | case 0: | |
746 | rqstp->rq_client = &ipm->m_client->h; | |
efc36aa5 | 747 | kref_get(&rqstp->rq_client->ref); |
3be4479f | 748 | ip_map_cached_put(xprt, ipm); |
1da177e4 LT |
749 | break; |
750 | } | |
dc83d6e2 BF |
751 | |
752 | gi = unix_gid_find(cred->cr_uid, rqstp); | |
753 | switch (PTR_ERR(gi)) { | |
754 | case -EAGAIN: | |
755 | return SVC_DROP; | |
1ebede86 N |
756 | case -ESHUTDOWN: |
757 | return SVC_CLOSE; | |
dc83d6e2 BF |
758 | case -ENOENT: |
759 | break; | |
760 | default: | |
761 | put_group_info(cred->cr_group_info); | |
762 | cred->cr_group_info = gi; | |
763 | } | |
1da177e4 LT |
764 | return SVC_OK; |
765 | } | |
766 | ||
24c3767e | 767 | EXPORT_SYMBOL_GPL(svcauth_unix_set_client); |
3ab4d8b1 | 768 | |
1da177e4 | 769 | static int |
d8ed029d | 770 | svcauth_null_accept(struct svc_rqst *rqstp, __be32 *authp) |
1da177e4 LT |
771 | { |
772 | struct kvec *argv = &rqstp->rq_arg.head[0]; | |
773 | struct kvec *resv = &rqstp->rq_res.head[0]; | |
774 | struct svc_cred *cred = &rqstp->rq_cred; | |
775 | ||
776 | cred->cr_group_info = NULL; | |
777 | rqstp->rq_client = NULL; | |
778 | ||
779 | if (argv->iov_len < 3*4) | |
780 | return SVC_GARBAGE; | |
781 | ||
cca5172a | 782 | if (svc_getu32(argv) != 0) { |
1da177e4 LT |
783 | dprintk("svc: bad null cred\n"); |
784 | *authp = rpc_autherr_badcred; | |
785 | return SVC_DENIED; | |
786 | } | |
76994313 | 787 | if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) { |
1da177e4 LT |
788 | dprintk("svc: bad null verf\n"); |
789 | *authp = rpc_autherr_badverf; | |
790 | return SVC_DENIED; | |
791 | } | |
792 | ||
793 | /* Signal that mapping to nobody uid/gid is required */ | |
794 | cred->cr_uid = (uid_t) -1; | |
795 | cred->cr_gid = (gid_t) -1; | |
796 | cred->cr_group_info = groups_alloc(0); | |
797 | if (cred->cr_group_info == NULL) | |
1ebede86 | 798 | return SVC_CLOSE; /* kmalloc failure - client must retry */ |
1da177e4 LT |
799 | |
800 | /* Put NULL verifier */ | |
76994313 AD |
801 | svc_putnl(resv, RPC_AUTH_NULL); |
802 | svc_putnl(resv, 0); | |
1da177e4 | 803 | |
c4170583 | 804 | rqstp->rq_flavor = RPC_AUTH_NULL; |
1da177e4 LT |
805 | return SVC_OK; |
806 | } | |
807 | ||
808 | static int | |
809 | svcauth_null_release(struct svc_rqst *rqstp) | |
810 | { | |
811 | if (rqstp->rq_client) | |
812 | auth_domain_put(rqstp->rq_client); | |
813 | rqstp->rq_client = NULL; | |
814 | if (rqstp->rq_cred.cr_group_info) | |
815 | put_group_info(rqstp->rq_cred.cr_group_info); | |
816 | rqstp->rq_cred.cr_group_info = NULL; | |
817 | ||
818 | return 0; /* don't drop */ | |
819 | } | |
820 | ||
821 | ||
822 | struct auth_ops svcauth_null = { | |
823 | .name = "null", | |
824 | .owner = THIS_MODULE, | |
825 | .flavour = RPC_AUTH_NULL, | |
826 | .accept = svcauth_null_accept, | |
827 | .release = svcauth_null_release, | |
828 | .set_client = svcauth_unix_set_client, | |
829 | }; | |
830 | ||
831 | ||
832 | static int | |
d8ed029d | 833 | svcauth_unix_accept(struct svc_rqst *rqstp, __be32 *authp) |
1da177e4 LT |
834 | { |
835 | struct kvec *argv = &rqstp->rq_arg.head[0]; | |
836 | struct kvec *resv = &rqstp->rq_res.head[0]; | |
837 | struct svc_cred *cred = &rqstp->rq_cred; | |
838 | u32 slen, i; | |
839 | int len = argv->iov_len; | |
840 | ||
841 | cred->cr_group_info = NULL; | |
842 | rqstp->rq_client = NULL; | |
843 | ||
844 | if ((len -= 3*4) < 0) | |
845 | return SVC_GARBAGE; | |
846 | ||
847 | svc_getu32(argv); /* length */ | |
848 | svc_getu32(argv); /* time stamp */ | |
76994313 | 849 | slen = XDR_QUADLEN(svc_getnl(argv)); /* machname length */ |
1da177e4 LT |
850 | if (slen > 64 || (len -= (slen + 3)*4) < 0) |
851 | goto badcred; | |
d8ed029d | 852 | argv->iov_base = (void*)((__be32*)argv->iov_base + slen); /* skip machname */ |
1da177e4 LT |
853 | argv->iov_len -= slen*4; |
854 | ||
76994313 AD |
855 | cred->cr_uid = svc_getnl(argv); /* uid */ |
856 | cred->cr_gid = svc_getnl(argv); /* gid */ | |
857 | slen = svc_getnl(argv); /* gids length */ | |
1da177e4 LT |
858 | if (slen > 16 || (len -= (slen + 2)*4) < 0) |
859 | goto badcred; | |
dc83d6e2 BF |
860 | cred->cr_group_info = groups_alloc(slen); |
861 | if (cred->cr_group_info == NULL) | |
1ebede86 | 862 | return SVC_CLOSE; |
dc83d6e2 BF |
863 | for (i = 0; i < slen; i++) |
864 | GROUP_AT(cred->cr_group_info, i) = svc_getnl(argv); | |
76994313 | 865 | if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) { |
1da177e4 LT |
866 | *authp = rpc_autherr_badverf; |
867 | return SVC_DENIED; | |
868 | } | |
869 | ||
870 | /* Put NULL verifier */ | |
76994313 AD |
871 | svc_putnl(resv, RPC_AUTH_NULL); |
872 | svc_putnl(resv, 0); | |
1da177e4 | 873 | |
c4170583 | 874 | rqstp->rq_flavor = RPC_AUTH_UNIX; |
1da177e4 LT |
875 | return SVC_OK; |
876 | ||
877 | badcred: | |
878 | *authp = rpc_autherr_badcred; | |
879 | return SVC_DENIED; | |
880 | } | |
881 | ||
882 | static int | |
883 | svcauth_unix_release(struct svc_rqst *rqstp) | |
884 | { | |
885 | /* Verifier (such as it is) is already in place. | |
886 | */ | |
887 | if (rqstp->rq_client) | |
888 | auth_domain_put(rqstp->rq_client); | |
889 | rqstp->rq_client = NULL; | |
890 | if (rqstp->rq_cred.cr_group_info) | |
891 | put_group_info(rqstp->rq_cred.cr_group_info); | |
892 | rqstp->rq_cred.cr_group_info = NULL; | |
893 | ||
894 | return 0; | |
895 | } | |
896 | ||
897 | ||
898 | struct auth_ops svcauth_unix = { | |
899 | .name = "unix", | |
900 | .owner = THIS_MODULE, | |
901 | .flavour = RPC_AUTH_UNIX, | |
902 | .accept = svcauth_unix_accept, | |
903 | .release = svcauth_unix_release, | |
904 | .domain_release = svcauth_unix_domain_release, | |
905 | .set_client = svcauth_unix_set_client, | |
906 | }; | |
907 |