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> |
5a0e3ad6 | 13 | #include <linux/slab.h> |
7b2b1fee | 14 | #include <net/sock.h> |
f15364bd AC |
15 | #include <net/ipv6.h> |
16 | #include <linux/kernel.h> | |
ae2975bc | 17 | #include <linux/user_namespace.h> |
1da177e4 LT |
18 | #define RPCDBG_FACILITY RPCDBG_AUTH |
19 | ||
07396051 | 20 | #include <linux/sunrpc/clnt.h> |
1da177e4 | 21 | |
90d51b02 PE |
22 | #include "netns.h" |
23 | ||
1da177e4 LT |
24 | /* |
25 | * AUTHUNIX and AUTHNULL credentials are both handled here. | |
26 | * AUTHNULL is treated just like AUTHUNIX except that the uid/gid | |
27 | * are always nobody (-2). i.e. we do the same IP address checks for | |
28 | * AUTHNULL as for AUTHUNIX, and that is done here. | |
29 | */ | |
30 | ||
31 | ||
1da177e4 LT |
32 | struct unix_domain { |
33 | struct auth_domain h; | |
1da177e4 LT |
34 | /* other stuff later */ |
35 | }; | |
36 | ||
13e0e958 | 37 | extern struct auth_ops svcauth_null; |
efc36aa5 N |
38 | extern struct auth_ops svcauth_unix; |
39 | ||
8b3e07ac BF |
40 | static void svcauth_unix_domain_release(struct auth_domain *dom) |
41 | { | |
42 | struct unix_domain *ud = container_of(dom, struct unix_domain, h); | |
43 | ||
44 | kfree(dom->name); | |
45 | kfree(ud); | |
46 | } | |
47 | ||
1da177e4 LT |
48 | struct auth_domain *unix_domain_find(char *name) |
49 | { | |
efc36aa5 N |
50 | struct auth_domain *rv; |
51 | struct unix_domain *new = NULL; | |
52 | ||
53 | rv = auth_domain_lookup(name, NULL); | |
54 | while(1) { | |
ad1b5229 N |
55 | if (rv) { |
56 | if (new && rv != &new->h) | |
352b5d13 | 57 | svcauth_unix_domain_release(&new->h); |
ad1b5229 N |
58 | |
59 | if (rv->flavour != &svcauth_unix) { | |
60 | auth_domain_put(rv); | |
61 | return NULL; | |
62 | } | |
efc36aa5 N |
63 | return rv; |
64 | } | |
efc36aa5 N |
65 | |
66 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
67 | if (new == NULL) | |
68 | return NULL; | |
69 | kref_init(&new->h.ref); | |
70 | new->h.name = kstrdup(name, GFP_KERNEL); | |
dd08d6ea N |
71 | if (new->h.name == NULL) { |
72 | kfree(new); | |
73 | return NULL; | |
74 | } | |
efc36aa5 | 75 | new->h.flavour = &svcauth_unix; |
efc36aa5 | 76 | rv = auth_domain_lookup(name, &new->h); |
1da177e4 | 77 | } |
1da177e4 | 78 | } |
24c3767e | 79 | EXPORT_SYMBOL_GPL(unix_domain_find); |
1da177e4 | 80 | |
1da177e4 LT |
81 | |
82 | /************************************************** | |
83 | * cache for IP address to unix_domain | |
84 | * as needed by AUTH_UNIX | |
85 | */ | |
86 | #define IP_HASHBITS 8 | |
87 | #define IP_HASHMAX (1<<IP_HASHBITS) | |
1da177e4 LT |
88 | |
89 | struct ip_map { | |
90 | struct cache_head h; | |
91 | char m_class[8]; /* e.g. "nfsd" */ | |
f15364bd | 92 | struct in6_addr m_addr; |
1da177e4 | 93 | struct unix_domain *m_client; |
1da177e4 | 94 | }; |
1da177e4 | 95 | |
baab935f | 96 | static void ip_map_put(struct kref *kref) |
1da177e4 | 97 | { |
baab935f | 98 | struct cache_head *item = container_of(kref, struct cache_head, ref); |
1da177e4 | 99 | struct ip_map *im = container_of(item, struct ip_map,h); |
baab935f N |
100 | |
101 | if (test_bit(CACHE_VALID, &item->flags) && | |
102 | !test_bit(CACHE_NEGATIVE, &item->flags)) | |
103 | auth_domain_put(&im->m_client->h); | |
104 | kfree(im); | |
1da177e4 LT |
105 | } |
106 | ||
ddbe5032 | 107 | static inline int hash_ip6(const struct in6_addr *ip) |
f15364bd | 108 | { |
ddbe5032 | 109 | return hash_32(ipv6_addr_hash(ip), IP_HASHBITS); |
f15364bd | 110 | } |
1a9917c2 | 111 | static int ip_map_match(struct cache_head *corig, struct cache_head *cnew) |
1da177e4 | 112 | { |
1a9917c2 N |
113 | struct ip_map *orig = container_of(corig, struct ip_map, h); |
114 | struct ip_map *new = container_of(cnew, struct ip_map, h); | |
f64f9e71 JP |
115 | return strcmp(orig->m_class, new->m_class) == 0 && |
116 | ipv6_addr_equal(&orig->m_addr, &new->m_addr); | |
1da177e4 | 117 | } |
1a9917c2 | 118 | static void ip_map_init(struct cache_head *cnew, struct cache_head *citem) |
1da177e4 | 119 | { |
1a9917c2 N |
120 | struct ip_map *new = container_of(cnew, struct ip_map, h); |
121 | struct ip_map *item = container_of(citem, struct ip_map, h); | |
122 | ||
1da177e4 | 123 | strcpy(new->m_class, item->m_class); |
4e3fd7a0 | 124 | new->m_addr = item->m_addr; |
1da177e4 | 125 | } |
1a9917c2 | 126 | static void update(struct cache_head *cnew, struct cache_head *citem) |
1da177e4 | 127 | { |
1a9917c2 N |
128 | struct ip_map *new = container_of(cnew, struct ip_map, h); |
129 | struct ip_map *item = container_of(citem, struct ip_map, h); | |
130 | ||
efc36aa5 | 131 | kref_get(&item->m_client->h.ref); |
1da177e4 | 132 | new->m_client = item->m_client; |
1da177e4 | 133 | } |
1a9917c2 N |
134 | static struct cache_head *ip_map_alloc(void) |
135 | { | |
136 | struct ip_map *i = kmalloc(sizeof(*i), GFP_KERNEL); | |
137 | if (i) | |
138 | return &i->h; | |
139 | else | |
140 | return NULL; | |
141 | } | |
1da177e4 LT |
142 | |
143 | static void ip_map_request(struct cache_detail *cd, | |
144 | struct cache_head *h, | |
145 | char **bpp, int *blen) | |
146 | { | |
f15364bd | 147 | char text_addr[40]; |
1da177e4 | 148 | struct ip_map *im = container_of(h, struct ip_map, h); |
1da177e4 | 149 | |
f15364bd | 150 | if (ipv6_addr_v4mapped(&(im->m_addr))) { |
21454aaa | 151 | snprintf(text_addr, 20, "%pI4", &im->m_addr.s6_addr32[3]); |
f15364bd | 152 | } else { |
5b095d98 | 153 | snprintf(text_addr, 40, "%pI6", &im->m_addr); |
f15364bd | 154 | } |
1da177e4 LT |
155 | qword_add(bpp, blen, im->m_class); |
156 | qword_add(bpp, blen, text_addr); | |
157 | (*bpp)[-1] = '\n'; | |
158 | } | |
159 | ||
bc74b4f5 TM |
160 | static int ip_map_upcall(struct cache_detail *cd, struct cache_head *h) |
161 | { | |
162 | return sunrpc_cache_pipe_upcall(cd, h, ip_map_request); | |
163 | } | |
164 | ||
bf18ab32 PE |
165 | static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, struct in6_addr *addr); |
166 | static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm, struct unix_domain *udom, time_t expiry); | |
1da177e4 LT |
167 | |
168 | static int ip_map_parse(struct cache_detail *cd, | |
169 | char *mesg, int mlen) | |
170 | { | |
171 | /* class ipaddress [domainname] */ | |
172 | /* should be safe just to use the start of the input buffer | |
173 | * for scratch: */ | |
174 | char *buf = mesg; | |
175 | int len; | |
1a9917c2 | 176 | char class[8]; |
07396051 CL |
177 | union { |
178 | struct sockaddr sa; | |
179 | struct sockaddr_in s4; | |
180 | struct sockaddr_in6 s6; | |
181 | } address; | |
182 | struct sockaddr_in6 sin6; | |
1a9917c2 N |
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 | ||
d05cc104 | 201 | if (rpc_pton(cd->net, buf, len, &address.sa, sizeof(address)) == 0) |
1da177e4 | 202 | return -EINVAL; |
07396051 CL |
203 | switch (address.sa.sa_family) { |
204 | case AF_INET: | |
205 | /* Form a mapped IPv4 address in sin6 */ | |
07396051 | 206 | sin6.sin6_family = AF_INET6; |
70dc78da PE |
207 | ipv6_addr_set_v4mapped(address.s4.sin_addr.s_addr, |
208 | &sin6.sin6_addr); | |
07396051 | 209 | break; |
dfd56b8b | 210 | #if IS_ENABLED(CONFIG_IPV6) |
07396051 CL |
211 | case AF_INET6: |
212 | memcpy(&sin6, &address.s6, sizeof(sin6)); | |
213 | break; | |
214 | #endif | |
215 | default: | |
216 | return -EINVAL; | |
217 | } | |
cca5172a | 218 | |
1da177e4 LT |
219 | expiry = get_expiry(&mesg); |
220 | if (expiry ==0) | |
221 | return -EINVAL; | |
222 | ||
223 | /* domainname, or empty for NEGATIVE */ | |
224 | len = qword_get(&mesg, buf, mlen); | |
225 | if (len < 0) return -EINVAL; | |
226 | ||
227 | if (len) { | |
228 | dom = unix_domain_find(buf); | |
229 | if (dom == NULL) | |
230 | return -ENOENT; | |
231 | } else | |
232 | dom = NULL; | |
233 | ||
07396051 | 234 | /* IPv6 scope IDs are ignored for now */ |
bf18ab32 | 235 | ipmp = __ip_map_lookup(cd, class, &sin6.sin6_addr); |
1a9917c2 | 236 | if (ipmp) { |
bf18ab32 | 237 | err = __ip_map_update(cd, ipmp, |
1a9917c2 N |
238 | container_of(dom, struct unix_domain, h), |
239 | expiry); | |
1da177e4 | 240 | } else |
1a9917c2 | 241 | err = -ENOMEM; |
1da177e4 | 242 | |
1da177e4 LT |
243 | if (dom) |
244 | auth_domain_put(dom); | |
1a9917c2 | 245 | |
1da177e4 | 246 | cache_flush(); |
1a9917c2 | 247 | return err; |
1da177e4 LT |
248 | } |
249 | ||
250 | static int ip_map_show(struct seq_file *m, | |
251 | struct cache_detail *cd, | |
252 | struct cache_head *h) | |
253 | { | |
254 | struct ip_map *im; | |
f15364bd | 255 | struct in6_addr addr; |
1da177e4 LT |
256 | char *dom = "-no-domain-"; |
257 | ||
258 | if (h == NULL) { | |
259 | seq_puts(m, "#class IP domain\n"); | |
260 | return 0; | |
261 | } | |
262 | im = container_of(h, struct ip_map, h); | |
263 | /* class addr domain */ | |
4e3fd7a0 | 264 | addr = im->m_addr; |
1da177e4 | 265 | |
cca5172a | 266 | if (test_bit(CACHE_VALID, &h->flags) && |
1da177e4 LT |
267 | !test_bit(CACHE_NEGATIVE, &h->flags)) |
268 | dom = im->m_client->h.name; | |
269 | ||
f15364bd | 270 | if (ipv6_addr_v4mapped(&addr)) { |
21454aaa HH |
271 | seq_printf(m, "%s %pI4 %s\n", |
272 | im->m_class, &addr.s6_addr32[3], dom); | |
f15364bd | 273 | } else { |
5b095d98 | 274 | seq_printf(m, "%s %pI6 %s\n", im->m_class, &addr, dom); |
f15364bd | 275 | } |
1da177e4 LT |
276 | return 0; |
277 | } | |
cca5172a | 278 | |
1da177e4 | 279 | |
bf18ab32 PE |
280 | static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, |
281 | struct in6_addr *addr) | |
1a9917c2 N |
282 | { |
283 | struct ip_map ip; | |
284 | struct cache_head *ch; | |
285 | ||
286 | strcpy(ip.m_class, class); | |
4e3fd7a0 | 287 | ip.m_addr = *addr; |
bf18ab32 | 288 | ch = sunrpc_cache_lookup(cd, &ip.h, |
1a9917c2 | 289 | hash_str(class, IP_HASHBITS) ^ |
ddbe5032 | 290 | hash_ip6(addr)); |
1a9917c2 N |
291 | |
292 | if (ch) | |
293 | return container_of(ch, struct ip_map, h); | |
294 | else | |
295 | return NULL; | |
296 | } | |
1da177e4 | 297 | |
352114f3 PE |
298 | static inline struct ip_map *ip_map_lookup(struct net *net, char *class, |
299 | struct in6_addr *addr) | |
bf18ab32 | 300 | { |
90d51b02 PE |
301 | struct sunrpc_net *sn; |
302 | ||
303 | sn = net_generic(net, sunrpc_net_id); | |
304 | return __ip_map_lookup(sn->ip_map_cache, class, addr); | |
bf18ab32 PE |
305 | } |
306 | ||
307 | static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm, | |
308 | struct unix_domain *udom, time_t expiry) | |
1a9917c2 N |
309 | { |
310 | struct ip_map ip; | |
311 | struct cache_head *ch; | |
312 | ||
313 | ip.m_client = udom; | |
314 | ip.h.flags = 0; | |
315 | if (!udom) | |
316 | set_bit(CACHE_NEGATIVE, &ip.h.flags); | |
1a9917c2 | 317 | ip.h.expiry_time = expiry; |
bf18ab32 | 318 | ch = sunrpc_cache_update(cd, &ip.h, &ipm->h, |
1a9917c2 | 319 | hash_str(ipm->m_class, IP_HASHBITS) ^ |
ddbe5032 | 320 | hash_ip6(&ipm->m_addr)); |
1a9917c2 N |
321 | if (!ch) |
322 | return -ENOMEM; | |
bf18ab32 | 323 | cache_put(ch, cd); |
1a9917c2 N |
324 | return 0; |
325 | } | |
1da177e4 | 326 | |
352114f3 PE |
327 | static inline int ip_map_update(struct net *net, struct ip_map *ipm, |
328 | struct unix_domain *udom, time_t expiry) | |
bf18ab32 | 329 | { |
90d51b02 PE |
330 | struct sunrpc_net *sn; |
331 | ||
332 | sn = net_generic(net, sunrpc_net_id); | |
333 | return __ip_map_update(sn->ip_map_cache, ipm, udom, expiry); | |
bf18ab32 PE |
334 | } |
335 | ||
e5f06f72 | 336 | void svcauth_unix_purge(struct net *net) |
1da177e4 | 337 | { |
e5f06f72 | 338 | struct sunrpc_net *sn; |
90d51b02 | 339 | |
e5f06f72 SK |
340 | sn = net_generic(net, sunrpc_net_id); |
341 | cache_purge(sn->ip_map_cache); | |
1da177e4 | 342 | } |
24c3767e | 343 | EXPORT_SYMBOL_GPL(svcauth_unix_purge); |
1da177e4 | 344 | |
7b2b1fee | 345 | static inline struct ip_map * |
3be4479f | 346 | ip_map_cached_get(struct svc_xprt *xprt) |
7b2b1fee | 347 | { |
def13d74 | 348 | struct ip_map *ipm = NULL; |
90d51b02 | 349 | struct sunrpc_net *sn; |
def13d74 TT |
350 | |
351 | if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) { | |
352 | spin_lock(&xprt->xpt_lock); | |
353 | ipm = xprt->xpt_auth_cache; | |
354 | if (ipm != NULL) { | |
355 | if (!cache_valid(&ipm->h)) { | |
356 | /* | |
357 | * The entry has been invalidated since it was | |
358 | * remembered, e.g. by a second mount from the | |
359 | * same IP address. | |
360 | */ | |
90d51b02 | 361 | sn = net_generic(xprt->xpt_net, sunrpc_net_id); |
def13d74 TT |
362 | xprt->xpt_auth_cache = NULL; |
363 | spin_unlock(&xprt->xpt_lock); | |
90d51b02 | 364 | cache_put(&ipm->h, sn->ip_map_cache); |
def13d74 TT |
365 | return NULL; |
366 | } | |
367 | cache_get(&ipm->h); | |
7b2b1fee | 368 | } |
def13d74 | 369 | spin_unlock(&xprt->xpt_lock); |
7b2b1fee GB |
370 | } |
371 | return ipm; | |
372 | } | |
373 | ||
374 | static inline void | |
3be4479f | 375 | ip_map_cached_put(struct svc_xprt *xprt, struct ip_map *ipm) |
7b2b1fee | 376 | { |
def13d74 TT |
377 | if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) { |
378 | spin_lock(&xprt->xpt_lock); | |
379 | if (xprt->xpt_auth_cache == NULL) { | |
380 | /* newly cached, keep the reference */ | |
381 | xprt->xpt_auth_cache = ipm; | |
382 | ipm = NULL; | |
383 | } | |
384 | spin_unlock(&xprt->xpt_lock); | |
30f3deee | 385 | } |
90d51b02 PE |
386 | if (ipm) { |
387 | struct sunrpc_net *sn; | |
388 | ||
389 | sn = net_generic(xprt->xpt_net, sunrpc_net_id); | |
390 | cache_put(&ipm->h, sn->ip_map_cache); | |
391 | } | |
7b2b1fee GB |
392 | } |
393 | ||
394 | void | |
e3bfca01 | 395 | svcauth_unix_info_release(struct svc_xprt *xpt) |
7b2b1fee | 396 | { |
e3bfca01 PE |
397 | struct ip_map *ipm; |
398 | ||
399 | ipm = xpt->xpt_auth_cache; | |
90d51b02 PE |
400 | if (ipm != NULL) { |
401 | struct sunrpc_net *sn; | |
402 | ||
403 | sn = net_generic(xpt->xpt_net, sunrpc_net_id); | |
404 | cache_put(&ipm->h, sn->ip_map_cache); | |
405 | } | |
7b2b1fee GB |
406 | } |
407 | ||
3fc605a2 N |
408 | /**************************************************************************** |
409 | * auth.unix.gid cache | |
410 | * simple cache to map a UID to a list of GIDs | |
411 | * because AUTH_UNIX aka AUTH_SYS has a max of 16 | |
412 | */ | |
413 | #define GID_HASHBITS 8 | |
414 | #define GID_HASHMAX (1<<GID_HASHBITS) | |
3fc605a2 N |
415 | |
416 | struct unix_gid { | |
417 | struct cache_head h; | |
418 | uid_t uid; | |
419 | struct group_info *gi; | |
420 | }; | |
3fc605a2 N |
421 | |
422 | static void unix_gid_put(struct kref *kref) | |
423 | { | |
424 | struct cache_head *item = container_of(kref, struct cache_head, ref); | |
425 | struct unix_gid *ug = container_of(item, struct unix_gid, h); | |
426 | if (test_bit(CACHE_VALID, &item->flags) && | |
427 | !test_bit(CACHE_NEGATIVE, &item->flags)) | |
428 | put_group_info(ug->gi); | |
429 | kfree(ug); | |
430 | } | |
431 | ||
432 | static int unix_gid_match(struct cache_head *corig, struct cache_head *cnew) | |
433 | { | |
434 | struct unix_gid *orig = container_of(corig, struct unix_gid, h); | |
435 | struct unix_gid *new = container_of(cnew, struct unix_gid, h); | |
436 | return orig->uid == new->uid; | |
437 | } | |
438 | static void unix_gid_init(struct cache_head *cnew, struct cache_head *citem) | |
439 | { | |
440 | struct unix_gid *new = container_of(cnew, struct unix_gid, h); | |
441 | struct unix_gid *item = container_of(citem, struct unix_gid, h); | |
442 | new->uid = item->uid; | |
443 | } | |
444 | static void unix_gid_update(struct cache_head *cnew, struct cache_head *citem) | |
445 | { | |
446 | struct unix_gid *new = container_of(cnew, struct unix_gid, h); | |
447 | struct unix_gid *item = container_of(citem, struct unix_gid, h); | |
448 | ||
449 | get_group_info(item->gi); | |
450 | new->gi = item->gi; | |
451 | } | |
452 | static struct cache_head *unix_gid_alloc(void) | |
453 | { | |
454 | struct unix_gid *g = kmalloc(sizeof(*g), GFP_KERNEL); | |
455 | if (g) | |
456 | return &g->h; | |
457 | else | |
458 | return NULL; | |
459 | } | |
460 | ||
461 | static void unix_gid_request(struct cache_detail *cd, | |
462 | struct cache_head *h, | |
463 | char **bpp, int *blen) | |
464 | { | |
465 | char tuid[20]; | |
466 | struct unix_gid *ug = container_of(h, struct unix_gid, h); | |
467 | ||
468 | snprintf(tuid, 20, "%u", ug->uid); | |
469 | qword_add(bpp, blen, tuid); | |
470 | (*bpp)[-1] = '\n'; | |
471 | } | |
472 | ||
bc74b4f5 TM |
473 | static int unix_gid_upcall(struct cache_detail *cd, struct cache_head *h) |
474 | { | |
475 | return sunrpc_cache_pipe_upcall(cd, h, unix_gid_request); | |
476 | } | |
477 | ||
73393232 | 478 | static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, uid_t uid); |
3fc605a2 N |
479 | |
480 | static int unix_gid_parse(struct cache_detail *cd, | |
481 | char *mesg, int mlen) | |
482 | { | |
483 | /* uid expiry Ngid gid0 gid1 ... gidN-1 */ | |
484 | int uid; | |
485 | int gids; | |
486 | int rv; | |
487 | int i; | |
488 | int err; | |
489 | time_t expiry; | |
490 | struct unix_gid ug, *ugp; | |
491 | ||
3476964d | 492 | if (mesg[mlen - 1] != '\n') |
3fc605a2 N |
493 | return -EINVAL; |
494 | mesg[mlen-1] = 0; | |
495 | ||
496 | rv = get_int(&mesg, &uid); | |
497 | if (rv) | |
498 | return -EINVAL; | |
499 | ug.uid = uid; | |
500 | ||
501 | expiry = get_expiry(&mesg); | |
502 | if (expiry == 0) | |
503 | return -EINVAL; | |
504 | ||
505 | rv = get_int(&mesg, &gids); | |
506 | if (rv || gids < 0 || gids > 8192) | |
507 | return -EINVAL; | |
508 | ||
509 | ug.gi = groups_alloc(gids); | |
510 | if (!ug.gi) | |
511 | return -ENOMEM; | |
512 | ||
513 | for (i = 0 ; i < gids ; i++) { | |
514 | int gid; | |
ae2975bc | 515 | kgid_t kgid; |
3fc605a2 N |
516 | rv = get_int(&mesg, &gid); |
517 | err = -EINVAL; | |
518 | if (rv) | |
519 | goto out; | |
ae2975bc EB |
520 | kgid = make_kgid(&init_user_ns, gid); |
521 | if (!gid_valid(kgid)) | |
522 | goto out; | |
523 | GROUP_AT(ug.gi, i) = kgid; | |
3fc605a2 N |
524 | } |
525 | ||
73393232 | 526 | ugp = unix_gid_lookup(cd, uid); |
3fc605a2 N |
527 | if (ugp) { |
528 | struct cache_head *ch; | |
529 | ug.h.flags = 0; | |
530 | ug.h.expiry_time = expiry; | |
73393232 | 531 | ch = sunrpc_cache_update(cd, |
3fc605a2 N |
532 | &ug.h, &ugp->h, |
533 | hash_long(uid, GID_HASHBITS)); | |
534 | if (!ch) | |
535 | err = -ENOMEM; | |
536 | else { | |
537 | err = 0; | |
73393232 | 538 | cache_put(ch, cd); |
3fc605a2 N |
539 | } |
540 | } else | |
541 | err = -ENOMEM; | |
542 | out: | |
543 | if (ug.gi) | |
544 | put_group_info(ug.gi); | |
545 | return err; | |
546 | } | |
547 | ||
548 | static int unix_gid_show(struct seq_file *m, | |
549 | struct cache_detail *cd, | |
550 | struct cache_head *h) | |
551 | { | |
ae2975bc | 552 | struct user_namespace *user_ns = current_user_ns(); |
3fc605a2 N |
553 | struct unix_gid *ug; |
554 | int i; | |
555 | int glen; | |
556 | ||
557 | if (h == NULL) { | |
558 | seq_puts(m, "#uid cnt: gids...\n"); | |
559 | return 0; | |
560 | } | |
561 | ug = container_of(h, struct unix_gid, h); | |
562 | if (test_bit(CACHE_VALID, &h->flags) && | |
563 | !test_bit(CACHE_NEGATIVE, &h->flags)) | |
564 | glen = ug->gi->ngroups; | |
565 | else | |
566 | glen = 0; | |
567 | ||
ccdb357c | 568 | seq_printf(m, "%u %d:", ug->uid, glen); |
3fc605a2 | 569 | for (i = 0; i < glen; i++) |
ae2975bc | 570 | seq_printf(m, " %d", from_kgid_munged(user_ns, GROUP_AT(ug->gi, i))); |
3fc605a2 N |
571 | seq_printf(m, "\n"); |
572 | return 0; | |
573 | } | |
574 | ||
73393232 | 575 | static struct cache_detail unix_gid_cache_template = { |
3fc605a2 N |
576 | .owner = THIS_MODULE, |
577 | .hash_size = GID_HASHMAX, | |
3fc605a2 N |
578 | .name = "auth.unix.gid", |
579 | .cache_put = unix_gid_put, | |
bc74b4f5 | 580 | .cache_upcall = unix_gid_upcall, |
3fc605a2 N |
581 | .cache_parse = unix_gid_parse, |
582 | .cache_show = unix_gid_show, | |
583 | .match = unix_gid_match, | |
584 | .init = unix_gid_init, | |
585 | .update = unix_gid_update, | |
586 | .alloc = unix_gid_alloc, | |
587 | }; | |
588 | ||
73393232 SK |
589 | int unix_gid_cache_create(struct net *net) |
590 | { | |
591 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
592 | struct cache_detail *cd; | |
593 | int err; | |
594 | ||
595 | cd = cache_create_net(&unix_gid_cache_template, net); | |
596 | if (IS_ERR(cd)) | |
597 | return PTR_ERR(cd); | |
598 | err = cache_register_net(cd, net); | |
599 | if (err) { | |
600 | cache_destroy_net(cd, net); | |
601 | return err; | |
602 | } | |
603 | sn->unix_gid_cache = cd; | |
604 | return 0; | |
605 | } | |
606 | ||
607 | void unix_gid_cache_destroy(struct net *net) | |
608 | { | |
609 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
610 | struct cache_detail *cd = sn->unix_gid_cache; | |
611 | ||
612 | sn->unix_gid_cache = NULL; | |
613 | cache_purge(cd); | |
614 | cache_unregister_net(cd, net); | |
615 | cache_destroy_net(cd, net); | |
616 | } | |
617 | ||
618 | static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, uid_t uid) | |
3fc605a2 N |
619 | { |
620 | struct unix_gid ug; | |
621 | struct cache_head *ch; | |
622 | ||
623 | ug.uid = uid; | |
73393232 | 624 | ch = sunrpc_cache_lookup(cd, &ug.h, hash_long(uid, GID_HASHBITS)); |
3fc605a2 N |
625 | if (ch) |
626 | return container_of(ch, struct unix_gid, h); | |
627 | else | |
628 | return NULL; | |
629 | } | |
630 | ||
dc83d6e2 | 631 | static struct group_info *unix_gid_find(uid_t uid, struct svc_rqst *rqstp) |
3fc605a2 | 632 | { |
dc83d6e2 BF |
633 | struct unix_gid *ug; |
634 | struct group_info *gi; | |
635 | int ret; | |
73393232 SK |
636 | struct sunrpc_net *sn = net_generic(rqstp->rq_xprt->xpt_net, |
637 | sunrpc_net_id); | |
dc83d6e2 | 638 | |
73393232 | 639 | ug = unix_gid_lookup(sn->unix_gid_cache, uid); |
3fc605a2 | 640 | if (!ug) |
dc83d6e2 | 641 | return ERR_PTR(-EAGAIN); |
73393232 | 642 | ret = cache_check(sn->unix_gid_cache, &ug->h, &rqstp->rq_chandle); |
dc83d6e2 | 643 | switch (ret) { |
3fc605a2 | 644 | case -ENOENT: |
dc83d6e2 | 645 | return ERR_PTR(-ENOENT); |
1ebede86 N |
646 | case -ETIMEDOUT: |
647 | return ERR_PTR(-ESHUTDOWN); | |
3fc605a2 | 648 | case 0: |
dc83d6e2 | 649 | gi = get_group_info(ug->gi); |
73393232 | 650 | cache_put(&ug->h, sn->unix_gid_cache); |
dc83d6e2 | 651 | return gi; |
3fc605a2 | 652 | default: |
dc83d6e2 | 653 | return ERR_PTR(-EAGAIN); |
3fc605a2 N |
654 | } |
655 | } | |
656 | ||
3ab4d8b1 | 657 | int |
1da177e4 LT |
658 | svcauth_unix_set_client(struct svc_rqst *rqstp) |
659 | { | |
f15364bd AC |
660 | struct sockaddr_in *sin; |
661 | struct sockaddr_in6 *sin6, sin6_storage; | |
1a9917c2 | 662 | struct ip_map *ipm; |
dc83d6e2 BF |
663 | struct group_info *gi; |
664 | struct svc_cred *cred = &rqstp->rq_cred; | |
3be4479f | 665 | struct svc_xprt *xprt = rqstp->rq_xprt; |
90d51b02 PE |
666 | struct net *net = xprt->xpt_net; |
667 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
1da177e4 | 668 | |
f15364bd AC |
669 | switch (rqstp->rq_addr.ss_family) { |
670 | case AF_INET: | |
671 | sin = svc_addr_in(rqstp); | |
672 | sin6 = &sin6_storage; | |
b301e82c | 673 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &sin6->sin6_addr); |
f15364bd AC |
674 | break; |
675 | case AF_INET6: | |
676 | sin6 = svc_addr_in6(rqstp); | |
677 | break; | |
678 | default: | |
679 | BUG(); | |
680 | } | |
681 | ||
1da177e4 LT |
682 | rqstp->rq_client = NULL; |
683 | if (rqstp->rq_proc == 0) | |
684 | return SVC_OK; | |
685 | ||
3be4479f | 686 | ipm = ip_map_cached_get(xprt); |
7b2b1fee | 687 | if (ipm == NULL) |
90d51b02 | 688 | ipm = __ip_map_lookup(sn->ip_map_cache, rqstp->rq_server->sv_program->pg_class, |
f15364bd | 689 | &sin6->sin6_addr); |
1da177e4 LT |
690 | |
691 | if (ipm == NULL) | |
692 | return SVC_DENIED; | |
693 | ||
90d51b02 | 694 | switch (cache_check(sn->ip_map_cache, &ipm->h, &rqstp->rq_chandle)) { |
1da177e4 LT |
695 | default: |
696 | BUG(); | |
e0bb89ef | 697 | case -ETIMEDOUT: |
1ebede86 N |
698 | return SVC_CLOSE; |
699 | case -EAGAIN: | |
1da177e4 LT |
700 | return SVC_DROP; |
701 | case -ENOENT: | |
702 | return SVC_DENIED; | |
703 | case 0: | |
704 | rqstp->rq_client = &ipm->m_client->h; | |
efc36aa5 | 705 | kref_get(&rqstp->rq_client->ref); |
3be4479f | 706 | ip_map_cached_put(xprt, ipm); |
1da177e4 LT |
707 | break; |
708 | } | |
dc83d6e2 BF |
709 | |
710 | gi = unix_gid_find(cred->cr_uid, rqstp); | |
711 | switch (PTR_ERR(gi)) { | |
712 | case -EAGAIN: | |
713 | return SVC_DROP; | |
1ebede86 N |
714 | case -ESHUTDOWN: |
715 | return SVC_CLOSE; | |
dc83d6e2 BF |
716 | case -ENOENT: |
717 | break; | |
718 | default: | |
719 | put_group_info(cred->cr_group_info); | |
720 | cred->cr_group_info = gi; | |
721 | } | |
1da177e4 LT |
722 | return SVC_OK; |
723 | } | |
724 | ||
24c3767e | 725 | EXPORT_SYMBOL_GPL(svcauth_unix_set_client); |
3ab4d8b1 | 726 | |
1da177e4 | 727 | static int |
d8ed029d | 728 | svcauth_null_accept(struct svc_rqst *rqstp, __be32 *authp) |
1da177e4 LT |
729 | { |
730 | struct kvec *argv = &rqstp->rq_arg.head[0]; | |
731 | struct kvec *resv = &rqstp->rq_res.head[0]; | |
732 | struct svc_cred *cred = &rqstp->rq_cred; | |
733 | ||
734 | cred->cr_group_info = NULL; | |
03a4e1f6 | 735 | cred->cr_principal = NULL; |
1da177e4 LT |
736 | rqstp->rq_client = NULL; |
737 | ||
738 | if (argv->iov_len < 3*4) | |
739 | return SVC_GARBAGE; | |
740 | ||
cca5172a | 741 | if (svc_getu32(argv) != 0) { |
1da177e4 LT |
742 | dprintk("svc: bad null cred\n"); |
743 | *authp = rpc_autherr_badcred; | |
744 | return SVC_DENIED; | |
745 | } | |
76994313 | 746 | if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) { |
1da177e4 LT |
747 | dprintk("svc: bad null verf\n"); |
748 | *authp = rpc_autherr_badverf; | |
749 | return SVC_DENIED; | |
750 | } | |
751 | ||
752 | /* Signal that mapping to nobody uid/gid is required */ | |
753 | cred->cr_uid = (uid_t) -1; | |
754 | cred->cr_gid = (gid_t) -1; | |
755 | cred->cr_group_info = groups_alloc(0); | |
756 | if (cred->cr_group_info == NULL) | |
1ebede86 | 757 | return SVC_CLOSE; /* kmalloc failure - client must retry */ |
1da177e4 LT |
758 | |
759 | /* Put NULL verifier */ | |
76994313 AD |
760 | svc_putnl(resv, RPC_AUTH_NULL); |
761 | svc_putnl(resv, 0); | |
1da177e4 | 762 | |
d5497fc6 | 763 | rqstp->rq_cred.cr_flavor = RPC_AUTH_NULL; |
1da177e4 LT |
764 | return SVC_OK; |
765 | } | |
766 | ||
767 | static int | |
768 | svcauth_null_release(struct svc_rqst *rqstp) | |
769 | { | |
770 | if (rqstp->rq_client) | |
771 | auth_domain_put(rqstp->rq_client); | |
772 | rqstp->rq_client = NULL; | |
773 | if (rqstp->rq_cred.cr_group_info) | |
774 | put_group_info(rqstp->rq_cred.cr_group_info); | |
775 | rqstp->rq_cred.cr_group_info = NULL; | |
776 | ||
777 | return 0; /* don't drop */ | |
778 | } | |
779 | ||
780 | ||
781 | struct auth_ops svcauth_null = { | |
782 | .name = "null", | |
783 | .owner = THIS_MODULE, | |
784 | .flavour = RPC_AUTH_NULL, | |
785 | .accept = svcauth_null_accept, | |
786 | .release = svcauth_null_release, | |
787 | .set_client = svcauth_unix_set_client, | |
788 | }; | |
789 | ||
790 | ||
791 | static int | |
d8ed029d | 792 | svcauth_unix_accept(struct svc_rqst *rqstp, __be32 *authp) |
1da177e4 LT |
793 | { |
794 | struct kvec *argv = &rqstp->rq_arg.head[0]; | |
795 | struct kvec *resv = &rqstp->rq_res.head[0]; | |
796 | struct svc_cred *cred = &rqstp->rq_cred; | |
797 | u32 slen, i; | |
798 | int len = argv->iov_len; | |
799 | ||
800 | cred->cr_group_info = NULL; | |
03a4e1f6 | 801 | cred->cr_principal = NULL; |
1da177e4 LT |
802 | rqstp->rq_client = NULL; |
803 | ||
804 | if ((len -= 3*4) < 0) | |
805 | return SVC_GARBAGE; | |
806 | ||
807 | svc_getu32(argv); /* length */ | |
808 | svc_getu32(argv); /* time stamp */ | |
76994313 | 809 | slen = XDR_QUADLEN(svc_getnl(argv)); /* machname length */ |
1da177e4 LT |
810 | if (slen > 64 || (len -= (slen + 3)*4) < 0) |
811 | goto badcred; | |
d8ed029d | 812 | argv->iov_base = (void*)((__be32*)argv->iov_base + slen); /* skip machname */ |
1da177e4 LT |
813 | argv->iov_len -= slen*4; |
814 | ||
76994313 AD |
815 | cred->cr_uid = svc_getnl(argv); /* uid */ |
816 | cred->cr_gid = svc_getnl(argv); /* gid */ | |
817 | slen = svc_getnl(argv); /* gids length */ | |
1da177e4 LT |
818 | if (slen > 16 || (len -= (slen + 2)*4) < 0) |
819 | goto badcred; | |
dc83d6e2 BF |
820 | cred->cr_group_info = groups_alloc(slen); |
821 | if (cred->cr_group_info == NULL) | |
1ebede86 | 822 | return SVC_CLOSE; |
ae2975bc EB |
823 | for (i = 0; i < slen; i++) { |
824 | kgid_t kgid = make_kgid(&init_user_ns, svc_getnl(argv)); | |
825 | if (!gid_valid(kgid)) | |
826 | goto badcred; | |
827 | GROUP_AT(cred->cr_group_info, i) = kgid; | |
828 | } | |
76994313 | 829 | if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) { |
1da177e4 LT |
830 | *authp = rpc_autherr_badverf; |
831 | return SVC_DENIED; | |
832 | } | |
833 | ||
834 | /* Put NULL verifier */ | |
76994313 AD |
835 | svc_putnl(resv, RPC_AUTH_NULL); |
836 | svc_putnl(resv, 0); | |
1da177e4 | 837 | |
d5497fc6 | 838 | rqstp->rq_cred.cr_flavor = RPC_AUTH_UNIX; |
1da177e4 LT |
839 | return SVC_OK; |
840 | ||
841 | badcred: | |
842 | *authp = rpc_autherr_badcred; | |
843 | return SVC_DENIED; | |
844 | } | |
845 | ||
846 | static int | |
847 | svcauth_unix_release(struct svc_rqst *rqstp) | |
848 | { | |
849 | /* Verifier (such as it is) is already in place. | |
850 | */ | |
851 | if (rqstp->rq_client) | |
852 | auth_domain_put(rqstp->rq_client); | |
853 | rqstp->rq_client = NULL; | |
854 | if (rqstp->rq_cred.cr_group_info) | |
855 | put_group_info(rqstp->rq_cred.cr_group_info); | |
856 | rqstp->rq_cred.cr_group_info = NULL; | |
857 | ||
858 | return 0; | |
859 | } | |
860 | ||
861 | ||
862 | struct auth_ops svcauth_unix = { | |
863 | .name = "unix", | |
864 | .owner = THIS_MODULE, | |
865 | .flavour = RPC_AUTH_UNIX, | |
866 | .accept = svcauth_unix_accept, | |
867 | .release = svcauth_unix_release, | |
868 | .domain_release = svcauth_unix_domain_release, | |
869 | .set_client = svcauth_unix_set_client, | |
870 | }; | |
871 | ||
d05cc104 SK |
872 | static struct cache_detail ip_map_cache_template = { |
873 | .owner = THIS_MODULE, | |
874 | .hash_size = IP_HASHMAX, | |
875 | .name = "auth.unix.ip", | |
876 | .cache_put = ip_map_put, | |
877 | .cache_upcall = ip_map_upcall, | |
878 | .cache_parse = ip_map_parse, | |
879 | .cache_show = ip_map_show, | |
880 | .match = ip_map_match, | |
881 | .init = ip_map_init, | |
882 | .update = update, | |
883 | .alloc = ip_map_alloc, | |
884 | }; | |
885 | ||
90d51b02 PE |
886 | int ip_map_cache_create(struct net *net) |
887 | { | |
90d51b02 | 888 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
d05cc104 SK |
889 | struct cache_detail *cd; |
890 | int err; | |
90d51b02 | 891 | |
d05cc104 SK |
892 | cd = cache_create_net(&ip_map_cache_template, net); |
893 | if (IS_ERR(cd)) | |
894 | return PTR_ERR(cd); | |
90d51b02 | 895 | err = cache_register_net(cd, net); |
d05cc104 SK |
896 | if (err) { |
897 | cache_destroy_net(cd, net); | |
898 | return err; | |
899 | } | |
90d51b02 PE |
900 | sn->ip_map_cache = cd; |
901 | return 0; | |
90d51b02 PE |
902 | } |
903 | ||
904 | void ip_map_cache_destroy(struct net *net) | |
905 | { | |
d05cc104 SK |
906 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
907 | struct cache_detail *cd = sn->ip_map_cache; | |
90d51b02 | 908 | |
d05cc104 SK |
909 | sn->ip_map_cache = NULL; |
910 | cache_purge(cd); | |
911 | cache_unregister_net(cd, net); | |
912 | cache_destroy_net(cd, net); | |
90d51b02 | 913 | } |