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> |
5976687a | 9 | #include <linux/sunrpc/addr.h> |
1da177e4 LT |
10 | #include <linux/err.h> |
11 | #include <linux/seq_file.h> | |
12 | #include <linux/hash.h> | |
543537bd | 13 | #include <linux/string.h> |
5a0e3ad6 | 14 | #include <linux/slab.h> |
7b2b1fee | 15 | #include <net/sock.h> |
f15364bd AC |
16 | #include <net/ipv6.h> |
17 | #include <linux/kernel.h> | |
ae2975bc | 18 | #include <linux/user_namespace.h> |
1da177e4 LT |
19 | #define RPCDBG_FACILITY RPCDBG_AUTH |
20 | ||
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 | ||
bf18ab32 PE |
160 | static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, struct in6_addr *addr); |
161 | static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm, struct unix_domain *udom, time_t expiry); | |
1da177e4 LT |
162 | |
163 | static int ip_map_parse(struct cache_detail *cd, | |
164 | char *mesg, int mlen) | |
165 | { | |
166 | /* class ipaddress [domainname] */ | |
167 | /* should be safe just to use the start of the input buffer | |
168 | * for scratch: */ | |
169 | char *buf = mesg; | |
170 | int len; | |
1a9917c2 | 171 | char class[8]; |
07396051 CL |
172 | union { |
173 | struct sockaddr sa; | |
174 | struct sockaddr_in s4; | |
175 | struct sockaddr_in6 s6; | |
176 | } address; | |
177 | struct sockaddr_in6 sin6; | |
1a9917c2 N |
178 | int err; |
179 | ||
180 | struct ip_map *ipmp; | |
1da177e4 LT |
181 | struct auth_domain *dom; |
182 | time_t expiry; | |
183 | ||
184 | if (mesg[mlen-1] != '\n') | |
185 | return -EINVAL; | |
186 | mesg[mlen-1] = 0; | |
187 | ||
188 | /* class */ | |
1a9917c2 | 189 | len = qword_get(&mesg, class, sizeof(class)); |
1da177e4 LT |
190 | if (len <= 0) return -EINVAL; |
191 | ||
192 | /* ip address */ | |
193 | len = qword_get(&mesg, buf, mlen); | |
194 | if (len <= 0) return -EINVAL; | |
195 | ||
d05cc104 | 196 | if (rpc_pton(cd->net, buf, len, &address.sa, sizeof(address)) == 0) |
1da177e4 | 197 | return -EINVAL; |
07396051 CL |
198 | switch (address.sa.sa_family) { |
199 | case AF_INET: | |
200 | /* Form a mapped IPv4 address in sin6 */ | |
07396051 | 201 | sin6.sin6_family = AF_INET6; |
70dc78da PE |
202 | ipv6_addr_set_v4mapped(address.s4.sin_addr.s_addr, |
203 | &sin6.sin6_addr); | |
07396051 | 204 | break; |
dfd56b8b | 205 | #if IS_ENABLED(CONFIG_IPV6) |
07396051 CL |
206 | case AF_INET6: |
207 | memcpy(&sin6, &address.s6, sizeof(sin6)); | |
208 | break; | |
209 | #endif | |
210 | default: | |
211 | return -EINVAL; | |
212 | } | |
cca5172a | 213 | |
1da177e4 LT |
214 | expiry = get_expiry(&mesg); |
215 | if (expiry ==0) | |
216 | return -EINVAL; | |
217 | ||
218 | /* domainname, or empty for NEGATIVE */ | |
219 | len = qword_get(&mesg, buf, mlen); | |
220 | if (len < 0) return -EINVAL; | |
221 | ||
222 | if (len) { | |
223 | dom = unix_domain_find(buf); | |
224 | if (dom == NULL) | |
225 | return -ENOENT; | |
226 | } else | |
227 | dom = NULL; | |
228 | ||
07396051 | 229 | /* IPv6 scope IDs are ignored for now */ |
bf18ab32 | 230 | ipmp = __ip_map_lookup(cd, class, &sin6.sin6_addr); |
1a9917c2 | 231 | if (ipmp) { |
bf18ab32 | 232 | err = __ip_map_update(cd, ipmp, |
1a9917c2 N |
233 | container_of(dom, struct unix_domain, h), |
234 | expiry); | |
1da177e4 | 235 | } else |
1a9917c2 | 236 | err = -ENOMEM; |
1da177e4 | 237 | |
1da177e4 LT |
238 | if (dom) |
239 | auth_domain_put(dom); | |
1a9917c2 | 240 | |
1da177e4 | 241 | cache_flush(); |
1a9917c2 | 242 | return err; |
1da177e4 LT |
243 | } |
244 | ||
245 | static int ip_map_show(struct seq_file *m, | |
246 | struct cache_detail *cd, | |
247 | struct cache_head *h) | |
248 | { | |
249 | struct ip_map *im; | |
f15364bd | 250 | struct in6_addr addr; |
1da177e4 LT |
251 | char *dom = "-no-domain-"; |
252 | ||
253 | if (h == NULL) { | |
254 | seq_puts(m, "#class IP domain\n"); | |
255 | return 0; | |
256 | } | |
257 | im = container_of(h, struct ip_map, h); | |
258 | /* class addr domain */ | |
4e3fd7a0 | 259 | addr = im->m_addr; |
1da177e4 | 260 | |
cca5172a | 261 | if (test_bit(CACHE_VALID, &h->flags) && |
1da177e4 LT |
262 | !test_bit(CACHE_NEGATIVE, &h->flags)) |
263 | dom = im->m_client->h.name; | |
264 | ||
f15364bd | 265 | if (ipv6_addr_v4mapped(&addr)) { |
21454aaa HH |
266 | seq_printf(m, "%s %pI4 %s\n", |
267 | im->m_class, &addr.s6_addr32[3], dom); | |
f15364bd | 268 | } else { |
5b095d98 | 269 | seq_printf(m, "%s %pI6 %s\n", im->m_class, &addr, dom); |
f15364bd | 270 | } |
1da177e4 LT |
271 | return 0; |
272 | } | |
cca5172a | 273 | |
1da177e4 | 274 | |
bf18ab32 PE |
275 | static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, |
276 | struct in6_addr *addr) | |
1a9917c2 N |
277 | { |
278 | struct ip_map ip; | |
279 | struct cache_head *ch; | |
280 | ||
281 | strcpy(ip.m_class, class); | |
4e3fd7a0 | 282 | ip.m_addr = *addr; |
bf18ab32 | 283 | ch = sunrpc_cache_lookup(cd, &ip.h, |
1a9917c2 | 284 | hash_str(class, IP_HASHBITS) ^ |
ddbe5032 | 285 | hash_ip6(addr)); |
1a9917c2 N |
286 | |
287 | if (ch) | |
288 | return container_of(ch, struct ip_map, h); | |
289 | else | |
290 | return NULL; | |
291 | } | |
1da177e4 | 292 | |
352114f3 PE |
293 | static inline struct ip_map *ip_map_lookup(struct net *net, char *class, |
294 | struct in6_addr *addr) | |
bf18ab32 | 295 | { |
90d51b02 PE |
296 | struct sunrpc_net *sn; |
297 | ||
298 | sn = net_generic(net, sunrpc_net_id); | |
299 | return __ip_map_lookup(sn->ip_map_cache, class, addr); | |
bf18ab32 PE |
300 | } |
301 | ||
302 | static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm, | |
303 | struct unix_domain *udom, time_t expiry) | |
1a9917c2 N |
304 | { |
305 | struct ip_map ip; | |
306 | struct cache_head *ch; | |
307 | ||
308 | ip.m_client = udom; | |
309 | ip.h.flags = 0; | |
310 | if (!udom) | |
311 | set_bit(CACHE_NEGATIVE, &ip.h.flags); | |
1a9917c2 | 312 | ip.h.expiry_time = expiry; |
bf18ab32 | 313 | ch = sunrpc_cache_update(cd, &ip.h, &ipm->h, |
1a9917c2 | 314 | hash_str(ipm->m_class, IP_HASHBITS) ^ |
ddbe5032 | 315 | hash_ip6(&ipm->m_addr)); |
1a9917c2 N |
316 | if (!ch) |
317 | return -ENOMEM; | |
bf18ab32 | 318 | cache_put(ch, cd); |
1a9917c2 N |
319 | return 0; |
320 | } | |
1da177e4 | 321 | |
352114f3 PE |
322 | static inline int ip_map_update(struct net *net, struct ip_map *ipm, |
323 | struct unix_domain *udom, time_t expiry) | |
bf18ab32 | 324 | { |
90d51b02 PE |
325 | struct sunrpc_net *sn; |
326 | ||
327 | sn = net_generic(net, sunrpc_net_id); | |
328 | return __ip_map_update(sn->ip_map_cache, ipm, udom, expiry); | |
bf18ab32 PE |
329 | } |
330 | ||
e5f06f72 | 331 | void svcauth_unix_purge(struct net *net) |
1da177e4 | 332 | { |
e5f06f72 | 333 | struct sunrpc_net *sn; |
90d51b02 | 334 | |
e5f06f72 SK |
335 | sn = net_generic(net, sunrpc_net_id); |
336 | cache_purge(sn->ip_map_cache); | |
1da177e4 | 337 | } |
24c3767e | 338 | EXPORT_SYMBOL_GPL(svcauth_unix_purge); |
1da177e4 | 339 | |
7b2b1fee | 340 | static inline struct ip_map * |
3be4479f | 341 | ip_map_cached_get(struct svc_xprt *xprt) |
7b2b1fee | 342 | { |
def13d74 | 343 | struct ip_map *ipm = NULL; |
90d51b02 | 344 | struct sunrpc_net *sn; |
def13d74 TT |
345 | |
346 | if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) { | |
347 | spin_lock(&xprt->xpt_lock); | |
348 | ipm = xprt->xpt_auth_cache; | |
349 | if (ipm != NULL) { | |
350 | if (!cache_valid(&ipm->h)) { | |
351 | /* | |
352 | * The entry has been invalidated since it was | |
353 | * remembered, e.g. by a second mount from the | |
354 | * same IP address. | |
355 | */ | |
90d51b02 | 356 | sn = net_generic(xprt->xpt_net, sunrpc_net_id); |
def13d74 TT |
357 | xprt->xpt_auth_cache = NULL; |
358 | spin_unlock(&xprt->xpt_lock); | |
90d51b02 | 359 | cache_put(&ipm->h, sn->ip_map_cache); |
def13d74 TT |
360 | return NULL; |
361 | } | |
362 | cache_get(&ipm->h); | |
7b2b1fee | 363 | } |
def13d74 | 364 | spin_unlock(&xprt->xpt_lock); |
7b2b1fee GB |
365 | } |
366 | return ipm; | |
367 | } | |
368 | ||
369 | static inline void | |
3be4479f | 370 | ip_map_cached_put(struct svc_xprt *xprt, struct ip_map *ipm) |
7b2b1fee | 371 | { |
def13d74 TT |
372 | if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) { |
373 | spin_lock(&xprt->xpt_lock); | |
374 | if (xprt->xpt_auth_cache == NULL) { | |
375 | /* newly cached, keep the reference */ | |
376 | xprt->xpt_auth_cache = ipm; | |
377 | ipm = NULL; | |
378 | } | |
379 | spin_unlock(&xprt->xpt_lock); | |
30f3deee | 380 | } |
90d51b02 PE |
381 | if (ipm) { |
382 | struct sunrpc_net *sn; | |
383 | ||
384 | sn = net_generic(xprt->xpt_net, sunrpc_net_id); | |
385 | cache_put(&ipm->h, sn->ip_map_cache); | |
386 | } | |
7b2b1fee GB |
387 | } |
388 | ||
389 | void | |
e3bfca01 | 390 | svcauth_unix_info_release(struct svc_xprt *xpt) |
7b2b1fee | 391 | { |
e3bfca01 PE |
392 | struct ip_map *ipm; |
393 | ||
394 | ipm = xpt->xpt_auth_cache; | |
90d51b02 PE |
395 | if (ipm != NULL) { |
396 | struct sunrpc_net *sn; | |
397 | ||
398 | sn = net_generic(xpt->xpt_net, sunrpc_net_id); | |
399 | cache_put(&ipm->h, sn->ip_map_cache); | |
400 | } | |
7b2b1fee GB |
401 | } |
402 | ||
3fc605a2 N |
403 | /**************************************************************************** |
404 | * auth.unix.gid cache | |
405 | * simple cache to map a UID to a list of GIDs | |
406 | * because AUTH_UNIX aka AUTH_SYS has a max of 16 | |
407 | */ | |
408 | #define GID_HASHBITS 8 | |
409 | #define GID_HASHMAX (1<<GID_HASHBITS) | |
3fc605a2 N |
410 | |
411 | struct unix_gid { | |
412 | struct cache_head h; | |
7eaf040b | 413 | kuid_t uid; |
3fc605a2 N |
414 | struct group_info *gi; |
415 | }; | |
3fc605a2 | 416 | |
9e469e30 EB |
417 | static int unix_gid_hash(kuid_t uid) |
418 | { | |
419 | return hash_long(from_kuid(&init_user_ns, uid), GID_HASHBITS); | |
420 | } | |
421 | ||
3fc605a2 N |
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); | |
0b4d51b0 | 436 | return uid_eq(orig->uid, new->uid); |
3fc605a2 N |
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 | ||
25da9263 | 468 | snprintf(tuid, 20, "%u", from_kuid(&init_user_ns, ug->uid)); |
3fc605a2 N |
469 | qword_add(bpp, blen, tuid); |
470 | (*bpp)[-1] = '\n'; | |
471 | } | |
472 | ||
7eaf040b | 473 | static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, kuid_t uid); |
3fc605a2 N |
474 | |
475 | static int unix_gid_parse(struct cache_detail *cd, | |
476 | char *mesg, int mlen) | |
477 | { | |
478 | /* uid expiry Ngid gid0 gid1 ... gidN-1 */ | |
25da9263 EB |
479 | int id; |
480 | kuid_t uid; | |
3fc605a2 N |
481 | int gids; |
482 | int rv; | |
483 | int i; | |
484 | int err; | |
485 | time_t expiry; | |
486 | struct unix_gid ug, *ugp; | |
487 | ||
3476964d | 488 | if (mesg[mlen - 1] != '\n') |
3fc605a2 N |
489 | return -EINVAL; |
490 | mesg[mlen-1] = 0; | |
491 | ||
25da9263 | 492 | rv = get_int(&mesg, &id); |
3fc605a2 N |
493 | if (rv) |
494 | return -EINVAL; | |
25da9263 EB |
495 | uid = make_kuid(&init_user_ns, id); |
496 | if (!uid_valid(uid)) | |
497 | return -EINVAL; | |
3fc605a2 N |
498 | ug.uid = uid; |
499 | ||
500 | expiry = get_expiry(&mesg); | |
501 | if (expiry == 0) | |
502 | return -EINVAL; | |
503 | ||
504 | rv = get_int(&mesg, &gids); | |
505 | if (rv || gids < 0 || gids > 8192) | |
506 | return -EINVAL; | |
507 | ||
508 | ug.gi = groups_alloc(gids); | |
509 | if (!ug.gi) | |
510 | return -ENOMEM; | |
511 | ||
512 | for (i = 0 ; i < gids ; i++) { | |
513 | int gid; | |
ae2975bc | 514 | kgid_t kgid; |
3fc605a2 N |
515 | rv = get_int(&mesg, &gid); |
516 | err = -EINVAL; | |
517 | if (rv) | |
518 | goto out; | |
ae2975bc EB |
519 | kgid = make_kgid(&init_user_ns, gid); |
520 | if (!gid_valid(kgid)) | |
521 | goto out; | |
522 | GROUP_AT(ug.gi, i) = kgid; | |
3fc605a2 N |
523 | } |
524 | ||
73393232 | 525 | ugp = unix_gid_lookup(cd, uid); |
3fc605a2 N |
526 | if (ugp) { |
527 | struct cache_head *ch; | |
528 | ug.h.flags = 0; | |
529 | ug.h.expiry_time = expiry; | |
73393232 | 530 | ch = sunrpc_cache_update(cd, |
3fc605a2 | 531 | &ug.h, &ugp->h, |
9e469e30 | 532 | unix_gid_hash(uid)); |
3fc605a2 N |
533 | if (!ch) |
534 | err = -ENOMEM; | |
535 | else { | |
536 | err = 0; | |
73393232 | 537 | cache_put(ch, cd); |
3fc605a2 N |
538 | } |
539 | } else | |
540 | err = -ENOMEM; | |
541 | out: | |
542 | if (ug.gi) | |
543 | put_group_info(ug.gi); | |
544 | return err; | |
545 | } | |
546 | ||
547 | static int unix_gid_show(struct seq_file *m, | |
548 | struct cache_detail *cd, | |
549 | struct cache_head *h) | |
550 | { | |
25da9263 | 551 | struct user_namespace *user_ns = &init_user_ns; |
3fc605a2 N |
552 | struct unix_gid *ug; |
553 | int i; | |
554 | int glen; | |
555 | ||
556 | if (h == NULL) { | |
557 | seq_puts(m, "#uid cnt: gids...\n"); | |
558 | return 0; | |
559 | } | |
560 | ug = container_of(h, struct unix_gid, h); | |
561 | if (test_bit(CACHE_VALID, &h->flags) && | |
562 | !test_bit(CACHE_NEGATIVE, &h->flags)) | |
563 | glen = ug->gi->ngroups; | |
564 | else | |
565 | glen = 0; | |
566 | ||
25da9263 | 567 | seq_printf(m, "%u %d:", from_kuid_munged(user_ns, ug->uid), glen); |
3fc605a2 | 568 | for (i = 0; i < glen; i++) |
ae2975bc | 569 | seq_printf(m, " %d", from_kgid_munged(user_ns, GROUP_AT(ug->gi, i))); |
3fc605a2 N |
570 | seq_printf(m, "\n"); |
571 | return 0; | |
572 | } | |
573 | ||
73393232 | 574 | static struct cache_detail unix_gid_cache_template = { |
3fc605a2 N |
575 | .owner = THIS_MODULE, |
576 | .hash_size = GID_HASHMAX, | |
3fc605a2 N |
577 | .name = "auth.unix.gid", |
578 | .cache_put = unix_gid_put, | |
73fb847a | 579 | .cache_request = unix_gid_request, |
3fc605a2 N |
580 | .cache_parse = unix_gid_parse, |
581 | .cache_show = unix_gid_show, | |
582 | .match = unix_gid_match, | |
583 | .init = unix_gid_init, | |
584 | .update = unix_gid_update, | |
585 | .alloc = unix_gid_alloc, | |
586 | }; | |
587 | ||
73393232 SK |
588 | int unix_gid_cache_create(struct net *net) |
589 | { | |
590 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
591 | struct cache_detail *cd; | |
592 | int err; | |
593 | ||
594 | cd = cache_create_net(&unix_gid_cache_template, net); | |
595 | if (IS_ERR(cd)) | |
596 | return PTR_ERR(cd); | |
597 | err = cache_register_net(cd, net); | |
598 | if (err) { | |
599 | cache_destroy_net(cd, net); | |
600 | return err; | |
601 | } | |
602 | sn->unix_gid_cache = cd; | |
603 | return 0; | |
604 | } | |
605 | ||
606 | void unix_gid_cache_destroy(struct net *net) | |
607 | { | |
608 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
609 | struct cache_detail *cd = sn->unix_gid_cache; | |
610 | ||
611 | sn->unix_gid_cache = NULL; | |
612 | cache_purge(cd); | |
613 | cache_unregister_net(cd, net); | |
614 | cache_destroy_net(cd, net); | |
615 | } | |
616 | ||
7eaf040b | 617 | static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, kuid_t uid) |
3fc605a2 N |
618 | { |
619 | struct unix_gid ug; | |
620 | struct cache_head *ch; | |
621 | ||
622 | ug.uid = uid; | |
9e469e30 | 623 | ch = sunrpc_cache_lookup(cd, &ug.h, unix_gid_hash(uid)); |
3fc605a2 N |
624 | if (ch) |
625 | return container_of(ch, struct unix_gid, h); | |
626 | else | |
627 | return NULL; | |
628 | } | |
629 | ||
7eaf040b | 630 | static struct group_info *unix_gid_find(kuid_t uid, struct svc_rqst *rqstp) |
3fc605a2 | 631 | { |
dc83d6e2 BF |
632 | struct unix_gid *ug; |
633 | struct group_info *gi; | |
634 | int ret; | |
73393232 SK |
635 | struct sunrpc_net *sn = net_generic(rqstp->rq_xprt->xpt_net, |
636 | sunrpc_net_id); | |
dc83d6e2 | 637 | |
73393232 | 638 | ug = unix_gid_lookup(sn->unix_gid_cache, uid); |
3fc605a2 | 639 | if (!ug) |
dc83d6e2 | 640 | return ERR_PTR(-EAGAIN); |
73393232 | 641 | ret = cache_check(sn->unix_gid_cache, &ug->h, &rqstp->rq_chandle); |
dc83d6e2 | 642 | switch (ret) { |
3fc605a2 | 643 | case -ENOENT: |
dc83d6e2 | 644 | return ERR_PTR(-ENOENT); |
1ebede86 N |
645 | case -ETIMEDOUT: |
646 | return ERR_PTR(-ESHUTDOWN); | |
3fc605a2 | 647 | case 0: |
dc83d6e2 | 648 | gi = get_group_info(ug->gi); |
73393232 | 649 | cache_put(&ug->h, sn->unix_gid_cache); |
dc83d6e2 | 650 | return gi; |
3fc605a2 | 651 | default: |
dc83d6e2 | 652 | return ERR_PTR(-EAGAIN); |
3fc605a2 N |
653 | } |
654 | } | |
655 | ||
3ab4d8b1 | 656 | int |
1da177e4 LT |
657 | svcauth_unix_set_client(struct svc_rqst *rqstp) |
658 | { | |
f15364bd AC |
659 | struct sockaddr_in *sin; |
660 | struct sockaddr_in6 *sin6, sin6_storage; | |
1a9917c2 | 661 | struct ip_map *ipm; |
dc83d6e2 BF |
662 | struct group_info *gi; |
663 | struct svc_cred *cred = &rqstp->rq_cred; | |
3be4479f | 664 | struct svc_xprt *xprt = rqstp->rq_xprt; |
90d51b02 PE |
665 | struct net *net = xprt->xpt_net; |
666 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
1da177e4 | 667 | |
f15364bd AC |
668 | switch (rqstp->rq_addr.ss_family) { |
669 | case AF_INET: | |
670 | sin = svc_addr_in(rqstp); | |
671 | sin6 = &sin6_storage; | |
b301e82c | 672 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &sin6->sin6_addr); |
f15364bd AC |
673 | break; |
674 | case AF_INET6: | |
675 | sin6 = svc_addr_in6(rqstp); | |
676 | break; | |
677 | default: | |
678 | BUG(); | |
679 | } | |
680 | ||
1da177e4 LT |
681 | rqstp->rq_client = NULL; |
682 | if (rqstp->rq_proc == 0) | |
683 | return SVC_OK; | |
684 | ||
3be4479f | 685 | ipm = ip_map_cached_get(xprt); |
7b2b1fee | 686 | if (ipm == NULL) |
90d51b02 | 687 | ipm = __ip_map_lookup(sn->ip_map_cache, rqstp->rq_server->sv_program->pg_class, |
f15364bd | 688 | &sin6->sin6_addr); |
1da177e4 LT |
689 | |
690 | if (ipm == NULL) | |
691 | return SVC_DENIED; | |
692 | ||
90d51b02 | 693 | switch (cache_check(sn->ip_map_cache, &ipm->h, &rqstp->rq_chandle)) { |
1da177e4 LT |
694 | default: |
695 | BUG(); | |
e0bb89ef | 696 | case -ETIMEDOUT: |
1ebede86 N |
697 | return SVC_CLOSE; |
698 | case -EAGAIN: | |
1da177e4 LT |
699 | return SVC_DROP; |
700 | case -ENOENT: | |
701 | return SVC_DENIED; | |
702 | case 0: | |
703 | rqstp->rq_client = &ipm->m_client->h; | |
efc36aa5 | 704 | kref_get(&rqstp->rq_client->ref); |
3be4479f | 705 | ip_map_cached_put(xprt, ipm); |
1da177e4 LT |
706 | break; |
707 | } | |
dc83d6e2 BF |
708 | |
709 | gi = unix_gid_find(cred->cr_uid, rqstp); | |
710 | switch (PTR_ERR(gi)) { | |
711 | case -EAGAIN: | |
712 | return SVC_DROP; | |
1ebede86 N |
713 | case -ESHUTDOWN: |
714 | return SVC_CLOSE; | |
dc83d6e2 BF |
715 | case -ENOENT: |
716 | break; | |
717 | default: | |
718 | put_group_info(cred->cr_group_info); | |
719 | cred->cr_group_info = gi; | |
720 | } | |
1da177e4 LT |
721 | return SVC_OK; |
722 | } | |
723 | ||
24c3767e | 724 | EXPORT_SYMBOL_GPL(svcauth_unix_set_client); |
3ab4d8b1 | 725 | |
1da177e4 | 726 | static int |
d8ed029d | 727 | svcauth_null_accept(struct svc_rqst *rqstp, __be32 *authp) |
1da177e4 LT |
728 | { |
729 | struct kvec *argv = &rqstp->rq_arg.head[0]; | |
730 | struct kvec *resv = &rqstp->rq_res.head[0]; | |
731 | struct svc_cred *cred = &rqstp->rq_cred; | |
732 | ||
733 | cred->cr_group_info = NULL; | |
03a4e1f6 | 734 | cred->cr_principal = NULL; |
1da177e4 LT |
735 | rqstp->rq_client = NULL; |
736 | ||
737 | if (argv->iov_len < 3*4) | |
738 | return SVC_GARBAGE; | |
739 | ||
cca5172a | 740 | if (svc_getu32(argv) != 0) { |
1da177e4 LT |
741 | dprintk("svc: bad null cred\n"); |
742 | *authp = rpc_autherr_badcred; | |
743 | return SVC_DENIED; | |
744 | } | |
76994313 | 745 | if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) { |
1da177e4 LT |
746 | dprintk("svc: bad null verf\n"); |
747 | *authp = rpc_autherr_badverf; | |
748 | return SVC_DENIED; | |
749 | } | |
750 | ||
751 | /* Signal that mapping to nobody uid/gid is required */ | |
bf37f794 EB |
752 | cred->cr_uid = INVALID_UID; |
753 | cred->cr_gid = INVALID_GID; | |
1da177e4 LT |
754 | cred->cr_group_info = groups_alloc(0); |
755 | if (cred->cr_group_info == NULL) | |
1ebede86 | 756 | return SVC_CLOSE; /* kmalloc failure - client must retry */ |
1da177e4 LT |
757 | |
758 | /* Put NULL verifier */ | |
76994313 AD |
759 | svc_putnl(resv, RPC_AUTH_NULL); |
760 | svc_putnl(resv, 0); | |
1da177e4 | 761 | |
d5497fc6 | 762 | rqstp->rq_cred.cr_flavor = RPC_AUTH_NULL; |
1da177e4 LT |
763 | return SVC_OK; |
764 | } | |
765 | ||
766 | static int | |
767 | svcauth_null_release(struct svc_rqst *rqstp) | |
768 | { | |
769 | if (rqstp->rq_client) | |
770 | auth_domain_put(rqstp->rq_client); | |
771 | rqstp->rq_client = NULL; | |
772 | if (rqstp->rq_cred.cr_group_info) | |
773 | put_group_info(rqstp->rq_cred.cr_group_info); | |
774 | rqstp->rq_cred.cr_group_info = NULL; | |
775 | ||
776 | return 0; /* don't drop */ | |
777 | } | |
778 | ||
779 | ||
780 | struct auth_ops svcauth_null = { | |
781 | .name = "null", | |
782 | .owner = THIS_MODULE, | |
783 | .flavour = RPC_AUTH_NULL, | |
784 | .accept = svcauth_null_accept, | |
785 | .release = svcauth_null_release, | |
786 | .set_client = svcauth_unix_set_client, | |
787 | }; | |
788 | ||
789 | ||
790 | static int | |
d8ed029d | 791 | svcauth_unix_accept(struct svc_rqst *rqstp, __be32 *authp) |
1da177e4 LT |
792 | { |
793 | struct kvec *argv = &rqstp->rq_arg.head[0]; | |
794 | struct kvec *resv = &rqstp->rq_res.head[0]; | |
795 | struct svc_cred *cred = &rqstp->rq_cred; | |
796 | u32 slen, i; | |
797 | int len = argv->iov_len; | |
798 | ||
799 | cred->cr_group_info = NULL; | |
03a4e1f6 | 800 | cred->cr_principal = NULL; |
1da177e4 LT |
801 | rqstp->rq_client = NULL; |
802 | ||
803 | if ((len -= 3*4) < 0) | |
804 | return SVC_GARBAGE; | |
805 | ||
806 | svc_getu32(argv); /* length */ | |
807 | svc_getu32(argv); /* time stamp */ | |
76994313 | 808 | slen = XDR_QUADLEN(svc_getnl(argv)); /* machname length */ |
1da177e4 LT |
809 | if (slen > 64 || (len -= (slen + 3)*4) < 0) |
810 | goto badcred; | |
d8ed029d | 811 | argv->iov_base = (void*)((__be32*)argv->iov_base + slen); /* skip machname */ |
1da177e4 LT |
812 | argv->iov_len -= slen*4; |
813 | ||
f025adf1 EB |
814 | cred->cr_uid = make_kuid(&init_user_ns, svc_getnl(argv)); /* uid */ |
815 | cred->cr_gid = make_kgid(&init_user_ns, svc_getnl(argv)); /* gid */ | |
816 | if (!uid_valid(cred->cr_uid) || !gid_valid(cred->cr_gid)) | |
817 | goto badcred; | |
76994313 | 818 | slen = svc_getnl(argv); /* gids length */ |
1da177e4 LT |
819 | if (slen > 16 || (len -= (slen + 2)*4) < 0) |
820 | goto badcred; | |
dc83d6e2 BF |
821 | cred->cr_group_info = groups_alloc(slen); |
822 | if (cred->cr_group_info == NULL) | |
1ebede86 | 823 | return SVC_CLOSE; |
ae2975bc EB |
824 | for (i = 0; i < slen; i++) { |
825 | kgid_t kgid = make_kgid(&init_user_ns, svc_getnl(argv)); | |
826 | if (!gid_valid(kgid)) | |
827 | goto badcred; | |
828 | GROUP_AT(cred->cr_group_info, i) = kgid; | |
829 | } | |
76994313 | 830 | if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) { |
1da177e4 LT |
831 | *authp = rpc_autherr_badverf; |
832 | return SVC_DENIED; | |
833 | } | |
834 | ||
835 | /* Put NULL verifier */ | |
76994313 AD |
836 | svc_putnl(resv, RPC_AUTH_NULL); |
837 | svc_putnl(resv, 0); | |
1da177e4 | 838 | |
d5497fc6 | 839 | rqstp->rq_cred.cr_flavor = RPC_AUTH_UNIX; |
1da177e4 LT |
840 | return SVC_OK; |
841 | ||
842 | badcred: | |
843 | *authp = rpc_autherr_badcred; | |
844 | return SVC_DENIED; | |
845 | } | |
846 | ||
847 | static int | |
848 | svcauth_unix_release(struct svc_rqst *rqstp) | |
849 | { | |
850 | /* Verifier (such as it is) is already in place. | |
851 | */ | |
852 | if (rqstp->rq_client) | |
853 | auth_domain_put(rqstp->rq_client); | |
854 | rqstp->rq_client = NULL; | |
855 | if (rqstp->rq_cred.cr_group_info) | |
856 | put_group_info(rqstp->rq_cred.cr_group_info); | |
857 | rqstp->rq_cred.cr_group_info = NULL; | |
858 | ||
859 | return 0; | |
860 | } | |
861 | ||
862 | ||
863 | struct auth_ops svcauth_unix = { | |
864 | .name = "unix", | |
865 | .owner = THIS_MODULE, | |
866 | .flavour = RPC_AUTH_UNIX, | |
867 | .accept = svcauth_unix_accept, | |
868 | .release = svcauth_unix_release, | |
869 | .domain_release = svcauth_unix_domain_release, | |
870 | .set_client = svcauth_unix_set_client, | |
871 | }; | |
872 | ||
d05cc104 SK |
873 | static struct cache_detail ip_map_cache_template = { |
874 | .owner = THIS_MODULE, | |
875 | .hash_size = IP_HASHMAX, | |
876 | .name = "auth.unix.ip", | |
877 | .cache_put = ip_map_put, | |
73fb847a | 878 | .cache_request = ip_map_request, |
d05cc104 SK |
879 | .cache_parse = ip_map_parse, |
880 | .cache_show = ip_map_show, | |
881 | .match = ip_map_match, | |
882 | .init = ip_map_init, | |
883 | .update = update, | |
884 | .alloc = ip_map_alloc, | |
885 | }; | |
886 | ||
90d51b02 PE |
887 | int ip_map_cache_create(struct net *net) |
888 | { | |
90d51b02 | 889 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
d05cc104 SK |
890 | struct cache_detail *cd; |
891 | int err; | |
90d51b02 | 892 | |
d05cc104 SK |
893 | cd = cache_create_net(&ip_map_cache_template, net); |
894 | if (IS_ERR(cd)) | |
895 | return PTR_ERR(cd); | |
90d51b02 | 896 | err = cache_register_net(cd, net); |
d05cc104 SK |
897 | if (err) { |
898 | cache_destroy_net(cd, net); | |
899 | return err; | |
900 | } | |
90d51b02 PE |
901 | sn->ip_map_cache = cd; |
902 | return 0; | |
90d51b02 PE |
903 | } |
904 | ||
905 | void ip_map_cache_destroy(struct net *net) | |
906 | { | |
d05cc104 SK |
907 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
908 | struct cache_detail *cd = sn->ip_map_cache; | |
90d51b02 | 909 | |
d05cc104 SK |
910 | sn->ip_map_cache = NULL; |
911 | cache_purge(cd); | |
912 | cache_unregister_net(cd, net); | |
913 | cache_destroy_net(cd, net); | |
90d51b02 | 914 | } |