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 | ||
1f1e030b N |
107 | #if IP_HASHBITS == 8 |
108 | /* hash_long on a 64 bit machine is currently REALLY BAD for | |
109 | * IP addresses in reverse-endian (i.e. on a little-endian machine). | |
110 | * So use a trivial but reliable hash instead | |
111 | */ | |
4806126d | 112 | static inline int hash_ip(__be32 ip) |
1f1e030b | 113 | { |
4806126d | 114 | int hash = (__force u32)ip ^ ((__force u32)ip>>16); |
1f1e030b N |
115 | return (hash ^ (hash>>8)) & 0xff; |
116 | } | |
117 | #endif | |
f15364bd AC |
118 | static inline int hash_ip6(struct in6_addr ip) |
119 | { | |
120 | return (hash_ip(ip.s6_addr32[0]) ^ | |
121 | hash_ip(ip.s6_addr32[1]) ^ | |
122 | hash_ip(ip.s6_addr32[2]) ^ | |
123 | hash_ip(ip.s6_addr32[3])); | |
124 | } | |
1a9917c2 | 125 | static int ip_map_match(struct cache_head *corig, struct cache_head *cnew) |
1da177e4 | 126 | { |
1a9917c2 N |
127 | struct ip_map *orig = container_of(corig, struct ip_map, h); |
128 | struct ip_map *new = container_of(cnew, struct ip_map, h); | |
f64f9e71 JP |
129 | return strcmp(orig->m_class, new->m_class) == 0 && |
130 | ipv6_addr_equal(&orig->m_addr, &new->m_addr); | |
1da177e4 | 131 | } |
1a9917c2 | 132 | static void ip_map_init(struct cache_head *cnew, struct cache_head *citem) |
1da177e4 | 133 | { |
1a9917c2 N |
134 | struct ip_map *new = container_of(cnew, struct ip_map, h); |
135 | struct ip_map *item = container_of(citem, struct ip_map, h); | |
136 | ||
1da177e4 | 137 | strcpy(new->m_class, item->m_class); |
4e3fd7a0 | 138 | new->m_addr = item->m_addr; |
1da177e4 | 139 | } |
1a9917c2 | 140 | static void update(struct cache_head *cnew, struct cache_head *citem) |
1da177e4 | 141 | { |
1a9917c2 N |
142 | struct ip_map *new = container_of(cnew, struct ip_map, h); |
143 | struct ip_map *item = container_of(citem, struct ip_map, h); | |
144 | ||
efc36aa5 | 145 | kref_get(&item->m_client->h.ref); |
1da177e4 | 146 | new->m_client = item->m_client; |
1da177e4 | 147 | } |
1a9917c2 N |
148 | static struct cache_head *ip_map_alloc(void) |
149 | { | |
150 | struct ip_map *i = kmalloc(sizeof(*i), GFP_KERNEL); | |
151 | if (i) | |
152 | return &i->h; | |
153 | else | |
154 | return NULL; | |
155 | } | |
1da177e4 LT |
156 | |
157 | static void ip_map_request(struct cache_detail *cd, | |
158 | struct cache_head *h, | |
159 | char **bpp, int *blen) | |
160 | { | |
f15364bd | 161 | char text_addr[40]; |
1da177e4 | 162 | struct ip_map *im = container_of(h, struct ip_map, h); |
1da177e4 | 163 | |
f15364bd | 164 | if (ipv6_addr_v4mapped(&(im->m_addr))) { |
21454aaa | 165 | snprintf(text_addr, 20, "%pI4", &im->m_addr.s6_addr32[3]); |
f15364bd | 166 | } else { |
5b095d98 | 167 | snprintf(text_addr, 40, "%pI6", &im->m_addr); |
f15364bd | 168 | } |
1da177e4 LT |
169 | qword_add(bpp, blen, im->m_class); |
170 | qword_add(bpp, blen, text_addr); | |
171 | (*bpp)[-1] = '\n'; | |
172 | } | |
173 | ||
bc74b4f5 TM |
174 | static int ip_map_upcall(struct cache_detail *cd, struct cache_head *h) |
175 | { | |
176 | return sunrpc_cache_pipe_upcall(cd, h, ip_map_request); | |
177 | } | |
178 | ||
bf18ab32 PE |
179 | static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, struct in6_addr *addr); |
180 | static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm, struct unix_domain *udom, time_t expiry); | |
1da177e4 LT |
181 | |
182 | static int ip_map_parse(struct cache_detail *cd, | |
183 | char *mesg, int mlen) | |
184 | { | |
185 | /* class ipaddress [domainname] */ | |
186 | /* should be safe just to use the start of the input buffer | |
187 | * for scratch: */ | |
188 | char *buf = mesg; | |
189 | int len; | |
1a9917c2 | 190 | char class[8]; |
07396051 CL |
191 | union { |
192 | struct sockaddr sa; | |
193 | struct sockaddr_in s4; | |
194 | struct sockaddr_in6 s6; | |
195 | } address; | |
196 | struct sockaddr_in6 sin6; | |
1a9917c2 N |
197 | int err; |
198 | ||
199 | struct ip_map *ipmp; | |
1da177e4 LT |
200 | struct auth_domain *dom; |
201 | time_t expiry; | |
202 | ||
203 | if (mesg[mlen-1] != '\n') | |
204 | return -EINVAL; | |
205 | mesg[mlen-1] = 0; | |
206 | ||
207 | /* class */ | |
1a9917c2 | 208 | len = qword_get(&mesg, class, sizeof(class)); |
1da177e4 LT |
209 | if (len <= 0) return -EINVAL; |
210 | ||
211 | /* ip address */ | |
212 | len = qword_get(&mesg, buf, mlen); | |
213 | if (len <= 0) return -EINVAL; | |
214 | ||
d05cc104 | 215 | if (rpc_pton(cd->net, buf, len, &address.sa, sizeof(address)) == 0) |
1da177e4 | 216 | return -EINVAL; |
07396051 CL |
217 | switch (address.sa.sa_family) { |
218 | case AF_INET: | |
219 | /* Form a mapped IPv4 address in sin6 */ | |
07396051 | 220 | sin6.sin6_family = AF_INET6; |
70dc78da PE |
221 | ipv6_addr_set_v4mapped(address.s4.sin_addr.s_addr, |
222 | &sin6.sin6_addr); | |
07396051 | 223 | break; |
dfd56b8b | 224 | #if IS_ENABLED(CONFIG_IPV6) |
07396051 CL |
225 | case AF_INET6: |
226 | memcpy(&sin6, &address.s6, sizeof(sin6)); | |
227 | break; | |
228 | #endif | |
229 | default: | |
230 | return -EINVAL; | |
231 | } | |
cca5172a | 232 | |
1da177e4 LT |
233 | expiry = get_expiry(&mesg); |
234 | if (expiry ==0) | |
235 | return -EINVAL; | |
236 | ||
237 | /* domainname, or empty for NEGATIVE */ | |
238 | len = qword_get(&mesg, buf, mlen); | |
239 | if (len < 0) return -EINVAL; | |
240 | ||
241 | if (len) { | |
242 | dom = unix_domain_find(buf); | |
243 | if (dom == NULL) | |
244 | return -ENOENT; | |
245 | } else | |
246 | dom = NULL; | |
247 | ||
07396051 | 248 | /* IPv6 scope IDs are ignored for now */ |
bf18ab32 | 249 | ipmp = __ip_map_lookup(cd, class, &sin6.sin6_addr); |
1a9917c2 | 250 | if (ipmp) { |
bf18ab32 | 251 | err = __ip_map_update(cd, ipmp, |
1a9917c2 N |
252 | container_of(dom, struct unix_domain, h), |
253 | expiry); | |
1da177e4 | 254 | } else |
1a9917c2 | 255 | err = -ENOMEM; |
1da177e4 | 256 | |
1da177e4 LT |
257 | if (dom) |
258 | auth_domain_put(dom); | |
1a9917c2 | 259 | |
1da177e4 | 260 | cache_flush(); |
1a9917c2 | 261 | return err; |
1da177e4 LT |
262 | } |
263 | ||
264 | static int ip_map_show(struct seq_file *m, | |
265 | struct cache_detail *cd, | |
266 | struct cache_head *h) | |
267 | { | |
268 | struct ip_map *im; | |
f15364bd | 269 | struct in6_addr addr; |
1da177e4 LT |
270 | char *dom = "-no-domain-"; |
271 | ||
272 | if (h == NULL) { | |
273 | seq_puts(m, "#class IP domain\n"); | |
274 | return 0; | |
275 | } | |
276 | im = container_of(h, struct ip_map, h); | |
277 | /* class addr domain */ | |
4e3fd7a0 | 278 | addr = im->m_addr; |
1da177e4 | 279 | |
cca5172a | 280 | if (test_bit(CACHE_VALID, &h->flags) && |
1da177e4 LT |
281 | !test_bit(CACHE_NEGATIVE, &h->flags)) |
282 | dom = im->m_client->h.name; | |
283 | ||
f15364bd | 284 | if (ipv6_addr_v4mapped(&addr)) { |
21454aaa HH |
285 | seq_printf(m, "%s %pI4 %s\n", |
286 | im->m_class, &addr.s6_addr32[3], dom); | |
f15364bd | 287 | } else { |
5b095d98 | 288 | seq_printf(m, "%s %pI6 %s\n", im->m_class, &addr, dom); |
f15364bd | 289 | } |
1da177e4 LT |
290 | return 0; |
291 | } | |
cca5172a | 292 | |
1da177e4 | 293 | |
bf18ab32 PE |
294 | static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, |
295 | struct in6_addr *addr) | |
1a9917c2 N |
296 | { |
297 | struct ip_map ip; | |
298 | struct cache_head *ch; | |
299 | ||
300 | strcpy(ip.m_class, class); | |
4e3fd7a0 | 301 | ip.m_addr = *addr; |
bf18ab32 | 302 | ch = sunrpc_cache_lookup(cd, &ip.h, |
1a9917c2 | 303 | hash_str(class, IP_HASHBITS) ^ |
f15364bd | 304 | hash_ip6(*addr)); |
1a9917c2 N |
305 | |
306 | if (ch) | |
307 | return container_of(ch, struct ip_map, h); | |
308 | else | |
309 | return NULL; | |
310 | } | |
1da177e4 | 311 | |
352114f3 PE |
312 | static inline struct ip_map *ip_map_lookup(struct net *net, char *class, |
313 | struct in6_addr *addr) | |
bf18ab32 | 314 | { |
90d51b02 PE |
315 | struct sunrpc_net *sn; |
316 | ||
317 | sn = net_generic(net, sunrpc_net_id); | |
318 | return __ip_map_lookup(sn->ip_map_cache, class, addr); | |
bf18ab32 PE |
319 | } |
320 | ||
321 | static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm, | |
322 | struct unix_domain *udom, time_t expiry) | |
1a9917c2 N |
323 | { |
324 | struct ip_map ip; | |
325 | struct cache_head *ch; | |
326 | ||
327 | ip.m_client = udom; | |
328 | ip.h.flags = 0; | |
329 | if (!udom) | |
330 | set_bit(CACHE_NEGATIVE, &ip.h.flags); | |
1a9917c2 | 331 | ip.h.expiry_time = expiry; |
bf18ab32 | 332 | ch = sunrpc_cache_update(cd, &ip.h, &ipm->h, |
1a9917c2 | 333 | hash_str(ipm->m_class, IP_HASHBITS) ^ |
f15364bd | 334 | hash_ip6(ipm->m_addr)); |
1a9917c2 N |
335 | if (!ch) |
336 | return -ENOMEM; | |
bf18ab32 | 337 | cache_put(ch, cd); |
1a9917c2 N |
338 | return 0; |
339 | } | |
1da177e4 | 340 | |
352114f3 PE |
341 | static inline int ip_map_update(struct net *net, struct ip_map *ipm, |
342 | struct unix_domain *udom, time_t expiry) | |
bf18ab32 | 343 | { |
90d51b02 PE |
344 | struct sunrpc_net *sn; |
345 | ||
346 | sn = net_generic(net, sunrpc_net_id); | |
347 | return __ip_map_update(sn->ip_map_cache, ipm, udom, expiry); | |
bf18ab32 PE |
348 | } |
349 | ||
e5f06f72 | 350 | void svcauth_unix_purge(struct net *net) |
1da177e4 | 351 | { |
e5f06f72 | 352 | struct sunrpc_net *sn; |
90d51b02 | 353 | |
e5f06f72 SK |
354 | sn = net_generic(net, sunrpc_net_id); |
355 | cache_purge(sn->ip_map_cache); | |
1da177e4 | 356 | } |
24c3767e | 357 | EXPORT_SYMBOL_GPL(svcauth_unix_purge); |
1da177e4 | 358 | |
7b2b1fee | 359 | static inline struct ip_map * |
3be4479f | 360 | ip_map_cached_get(struct svc_xprt *xprt) |
7b2b1fee | 361 | { |
def13d74 | 362 | struct ip_map *ipm = NULL; |
90d51b02 | 363 | struct sunrpc_net *sn; |
def13d74 TT |
364 | |
365 | if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) { | |
366 | spin_lock(&xprt->xpt_lock); | |
367 | ipm = xprt->xpt_auth_cache; | |
368 | if (ipm != NULL) { | |
369 | if (!cache_valid(&ipm->h)) { | |
370 | /* | |
371 | * The entry has been invalidated since it was | |
372 | * remembered, e.g. by a second mount from the | |
373 | * same IP address. | |
374 | */ | |
90d51b02 | 375 | sn = net_generic(xprt->xpt_net, sunrpc_net_id); |
def13d74 TT |
376 | xprt->xpt_auth_cache = NULL; |
377 | spin_unlock(&xprt->xpt_lock); | |
90d51b02 | 378 | cache_put(&ipm->h, sn->ip_map_cache); |
def13d74 TT |
379 | return NULL; |
380 | } | |
381 | cache_get(&ipm->h); | |
7b2b1fee | 382 | } |
def13d74 | 383 | spin_unlock(&xprt->xpt_lock); |
7b2b1fee GB |
384 | } |
385 | return ipm; | |
386 | } | |
387 | ||
388 | static inline void | |
3be4479f | 389 | ip_map_cached_put(struct svc_xprt *xprt, struct ip_map *ipm) |
7b2b1fee | 390 | { |
def13d74 TT |
391 | if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) { |
392 | spin_lock(&xprt->xpt_lock); | |
393 | if (xprt->xpt_auth_cache == NULL) { | |
394 | /* newly cached, keep the reference */ | |
395 | xprt->xpt_auth_cache = ipm; | |
396 | ipm = NULL; | |
397 | } | |
398 | spin_unlock(&xprt->xpt_lock); | |
30f3deee | 399 | } |
90d51b02 PE |
400 | if (ipm) { |
401 | struct sunrpc_net *sn; | |
402 | ||
403 | sn = net_generic(xprt->xpt_net, sunrpc_net_id); | |
404 | cache_put(&ipm->h, sn->ip_map_cache); | |
405 | } | |
7b2b1fee GB |
406 | } |
407 | ||
408 | void | |
e3bfca01 | 409 | svcauth_unix_info_release(struct svc_xprt *xpt) |
7b2b1fee | 410 | { |
e3bfca01 PE |
411 | struct ip_map *ipm; |
412 | ||
413 | ipm = xpt->xpt_auth_cache; | |
90d51b02 PE |
414 | if (ipm != NULL) { |
415 | struct sunrpc_net *sn; | |
416 | ||
417 | sn = net_generic(xpt->xpt_net, sunrpc_net_id); | |
418 | cache_put(&ipm->h, sn->ip_map_cache); | |
419 | } | |
7b2b1fee GB |
420 | } |
421 | ||
3fc605a2 N |
422 | /**************************************************************************** |
423 | * auth.unix.gid cache | |
424 | * simple cache to map a UID to a list of GIDs | |
425 | * because AUTH_UNIX aka AUTH_SYS has a max of 16 | |
426 | */ | |
427 | #define GID_HASHBITS 8 | |
428 | #define GID_HASHMAX (1<<GID_HASHBITS) | |
3fc605a2 N |
429 | |
430 | struct unix_gid { | |
431 | struct cache_head h; | |
432 | uid_t uid; | |
433 | struct group_info *gi; | |
434 | }; | |
3fc605a2 N |
435 | |
436 | static void unix_gid_put(struct kref *kref) | |
437 | { | |
438 | struct cache_head *item = container_of(kref, struct cache_head, ref); | |
439 | struct unix_gid *ug = container_of(item, struct unix_gid, h); | |
440 | if (test_bit(CACHE_VALID, &item->flags) && | |
441 | !test_bit(CACHE_NEGATIVE, &item->flags)) | |
442 | put_group_info(ug->gi); | |
443 | kfree(ug); | |
444 | } | |
445 | ||
446 | static int unix_gid_match(struct cache_head *corig, struct cache_head *cnew) | |
447 | { | |
448 | struct unix_gid *orig = container_of(corig, struct unix_gid, h); | |
449 | struct unix_gid *new = container_of(cnew, struct unix_gid, h); | |
450 | return orig->uid == new->uid; | |
451 | } | |
452 | static void unix_gid_init(struct cache_head *cnew, struct cache_head *citem) | |
453 | { | |
454 | struct unix_gid *new = container_of(cnew, struct unix_gid, h); | |
455 | struct unix_gid *item = container_of(citem, struct unix_gid, h); | |
456 | new->uid = item->uid; | |
457 | } | |
458 | static void unix_gid_update(struct cache_head *cnew, struct cache_head *citem) | |
459 | { | |
460 | struct unix_gid *new = container_of(cnew, struct unix_gid, h); | |
461 | struct unix_gid *item = container_of(citem, struct unix_gid, h); | |
462 | ||
463 | get_group_info(item->gi); | |
464 | new->gi = item->gi; | |
465 | } | |
466 | static struct cache_head *unix_gid_alloc(void) | |
467 | { | |
468 | struct unix_gid *g = kmalloc(sizeof(*g), GFP_KERNEL); | |
469 | if (g) | |
470 | return &g->h; | |
471 | else | |
472 | return NULL; | |
473 | } | |
474 | ||
475 | static void unix_gid_request(struct cache_detail *cd, | |
476 | struct cache_head *h, | |
477 | char **bpp, int *blen) | |
478 | { | |
479 | char tuid[20]; | |
480 | struct unix_gid *ug = container_of(h, struct unix_gid, h); | |
481 | ||
482 | snprintf(tuid, 20, "%u", ug->uid); | |
483 | qword_add(bpp, blen, tuid); | |
484 | (*bpp)[-1] = '\n'; | |
485 | } | |
486 | ||
bc74b4f5 TM |
487 | static int unix_gid_upcall(struct cache_detail *cd, struct cache_head *h) |
488 | { | |
489 | return sunrpc_cache_pipe_upcall(cd, h, unix_gid_request); | |
490 | } | |
491 | ||
73393232 | 492 | static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, uid_t uid); |
3fc605a2 N |
493 | |
494 | static int unix_gid_parse(struct cache_detail *cd, | |
495 | char *mesg, int mlen) | |
496 | { | |
497 | /* uid expiry Ngid gid0 gid1 ... gidN-1 */ | |
498 | int uid; | |
499 | int gids; | |
500 | int rv; | |
501 | int i; | |
502 | int err; | |
503 | time_t expiry; | |
504 | struct unix_gid ug, *ugp; | |
505 | ||
3476964d | 506 | if (mesg[mlen - 1] != '\n') |
3fc605a2 N |
507 | return -EINVAL; |
508 | mesg[mlen-1] = 0; | |
509 | ||
510 | rv = get_int(&mesg, &uid); | |
511 | if (rv) | |
512 | return -EINVAL; | |
513 | ug.uid = uid; | |
514 | ||
515 | expiry = get_expiry(&mesg); | |
516 | if (expiry == 0) | |
517 | return -EINVAL; | |
518 | ||
519 | rv = get_int(&mesg, &gids); | |
520 | if (rv || gids < 0 || gids > 8192) | |
521 | return -EINVAL; | |
522 | ||
523 | ug.gi = groups_alloc(gids); | |
524 | if (!ug.gi) | |
525 | return -ENOMEM; | |
526 | ||
527 | for (i = 0 ; i < gids ; i++) { | |
528 | int gid; | |
ae2975bc | 529 | kgid_t kgid; |
3fc605a2 N |
530 | rv = get_int(&mesg, &gid); |
531 | err = -EINVAL; | |
532 | if (rv) | |
533 | goto out; | |
ae2975bc EB |
534 | kgid = make_kgid(&init_user_ns, gid); |
535 | if (!gid_valid(kgid)) | |
536 | goto out; | |
537 | GROUP_AT(ug.gi, i) = kgid; | |
3fc605a2 N |
538 | } |
539 | ||
73393232 | 540 | ugp = unix_gid_lookup(cd, uid); |
3fc605a2 N |
541 | if (ugp) { |
542 | struct cache_head *ch; | |
543 | ug.h.flags = 0; | |
544 | ug.h.expiry_time = expiry; | |
73393232 | 545 | ch = sunrpc_cache_update(cd, |
3fc605a2 N |
546 | &ug.h, &ugp->h, |
547 | hash_long(uid, GID_HASHBITS)); | |
548 | if (!ch) | |
549 | err = -ENOMEM; | |
550 | else { | |
551 | err = 0; | |
73393232 | 552 | cache_put(ch, cd); |
3fc605a2 N |
553 | } |
554 | } else | |
555 | err = -ENOMEM; | |
556 | out: | |
557 | if (ug.gi) | |
558 | put_group_info(ug.gi); | |
559 | return err; | |
560 | } | |
561 | ||
562 | static int unix_gid_show(struct seq_file *m, | |
563 | struct cache_detail *cd, | |
564 | struct cache_head *h) | |
565 | { | |
ae2975bc | 566 | struct user_namespace *user_ns = current_user_ns(); |
3fc605a2 N |
567 | struct unix_gid *ug; |
568 | int i; | |
569 | int glen; | |
570 | ||
571 | if (h == NULL) { | |
572 | seq_puts(m, "#uid cnt: gids...\n"); | |
573 | return 0; | |
574 | } | |
575 | ug = container_of(h, struct unix_gid, h); | |
576 | if (test_bit(CACHE_VALID, &h->flags) && | |
577 | !test_bit(CACHE_NEGATIVE, &h->flags)) | |
578 | glen = ug->gi->ngroups; | |
579 | else | |
580 | glen = 0; | |
581 | ||
ccdb357c | 582 | seq_printf(m, "%u %d:", ug->uid, glen); |
3fc605a2 | 583 | for (i = 0; i < glen; i++) |
ae2975bc | 584 | seq_printf(m, " %d", from_kgid_munged(user_ns, GROUP_AT(ug->gi, i))); |
3fc605a2 N |
585 | seq_printf(m, "\n"); |
586 | return 0; | |
587 | } | |
588 | ||
73393232 | 589 | static struct cache_detail unix_gid_cache_template = { |
3fc605a2 N |
590 | .owner = THIS_MODULE, |
591 | .hash_size = GID_HASHMAX, | |
3fc605a2 N |
592 | .name = "auth.unix.gid", |
593 | .cache_put = unix_gid_put, | |
bc74b4f5 | 594 | .cache_upcall = unix_gid_upcall, |
3fc605a2 N |
595 | .cache_parse = unix_gid_parse, |
596 | .cache_show = unix_gid_show, | |
597 | .match = unix_gid_match, | |
598 | .init = unix_gid_init, | |
599 | .update = unix_gid_update, | |
600 | .alloc = unix_gid_alloc, | |
601 | }; | |
602 | ||
73393232 SK |
603 | int unix_gid_cache_create(struct net *net) |
604 | { | |
605 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
606 | struct cache_detail *cd; | |
607 | int err; | |
608 | ||
609 | cd = cache_create_net(&unix_gid_cache_template, net); | |
610 | if (IS_ERR(cd)) | |
611 | return PTR_ERR(cd); | |
612 | err = cache_register_net(cd, net); | |
613 | if (err) { | |
614 | cache_destroy_net(cd, net); | |
615 | return err; | |
616 | } | |
617 | sn->unix_gid_cache = cd; | |
618 | return 0; | |
619 | } | |
620 | ||
621 | void unix_gid_cache_destroy(struct net *net) | |
622 | { | |
623 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
624 | struct cache_detail *cd = sn->unix_gid_cache; | |
625 | ||
626 | sn->unix_gid_cache = NULL; | |
627 | cache_purge(cd); | |
628 | cache_unregister_net(cd, net); | |
629 | cache_destroy_net(cd, net); | |
630 | } | |
631 | ||
632 | static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, uid_t uid) | |
3fc605a2 N |
633 | { |
634 | struct unix_gid ug; | |
635 | struct cache_head *ch; | |
636 | ||
637 | ug.uid = uid; | |
73393232 | 638 | ch = sunrpc_cache_lookup(cd, &ug.h, hash_long(uid, GID_HASHBITS)); |
3fc605a2 N |
639 | if (ch) |
640 | return container_of(ch, struct unix_gid, h); | |
641 | else | |
642 | return NULL; | |
643 | } | |
644 | ||
dc83d6e2 | 645 | static struct group_info *unix_gid_find(uid_t uid, struct svc_rqst *rqstp) |
3fc605a2 | 646 | { |
dc83d6e2 BF |
647 | struct unix_gid *ug; |
648 | struct group_info *gi; | |
649 | int ret; | |
73393232 SK |
650 | struct sunrpc_net *sn = net_generic(rqstp->rq_xprt->xpt_net, |
651 | sunrpc_net_id); | |
dc83d6e2 | 652 | |
73393232 | 653 | ug = unix_gid_lookup(sn->unix_gid_cache, uid); |
3fc605a2 | 654 | if (!ug) |
dc83d6e2 | 655 | return ERR_PTR(-EAGAIN); |
73393232 | 656 | ret = cache_check(sn->unix_gid_cache, &ug->h, &rqstp->rq_chandle); |
dc83d6e2 | 657 | switch (ret) { |
3fc605a2 | 658 | case -ENOENT: |
dc83d6e2 | 659 | return ERR_PTR(-ENOENT); |
1ebede86 N |
660 | case -ETIMEDOUT: |
661 | return ERR_PTR(-ESHUTDOWN); | |
3fc605a2 | 662 | case 0: |
dc83d6e2 | 663 | gi = get_group_info(ug->gi); |
73393232 | 664 | cache_put(&ug->h, sn->unix_gid_cache); |
dc83d6e2 | 665 | return gi; |
3fc605a2 | 666 | default: |
dc83d6e2 | 667 | return ERR_PTR(-EAGAIN); |
3fc605a2 N |
668 | } |
669 | } | |
670 | ||
3ab4d8b1 | 671 | int |
1da177e4 LT |
672 | svcauth_unix_set_client(struct svc_rqst *rqstp) |
673 | { | |
f15364bd AC |
674 | struct sockaddr_in *sin; |
675 | struct sockaddr_in6 *sin6, sin6_storage; | |
1a9917c2 | 676 | struct ip_map *ipm; |
dc83d6e2 BF |
677 | struct group_info *gi; |
678 | struct svc_cred *cred = &rqstp->rq_cred; | |
3be4479f | 679 | struct svc_xprt *xprt = rqstp->rq_xprt; |
90d51b02 PE |
680 | struct net *net = xprt->xpt_net; |
681 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
1da177e4 | 682 | |
f15364bd AC |
683 | switch (rqstp->rq_addr.ss_family) { |
684 | case AF_INET: | |
685 | sin = svc_addr_in(rqstp); | |
686 | sin6 = &sin6_storage; | |
b301e82c | 687 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &sin6->sin6_addr); |
f15364bd AC |
688 | break; |
689 | case AF_INET6: | |
690 | sin6 = svc_addr_in6(rqstp); | |
691 | break; | |
692 | default: | |
693 | BUG(); | |
694 | } | |
695 | ||
1da177e4 LT |
696 | rqstp->rq_client = NULL; |
697 | if (rqstp->rq_proc == 0) | |
698 | return SVC_OK; | |
699 | ||
3be4479f | 700 | ipm = ip_map_cached_get(xprt); |
7b2b1fee | 701 | if (ipm == NULL) |
90d51b02 | 702 | ipm = __ip_map_lookup(sn->ip_map_cache, rqstp->rq_server->sv_program->pg_class, |
f15364bd | 703 | &sin6->sin6_addr); |
1da177e4 LT |
704 | |
705 | if (ipm == NULL) | |
706 | return SVC_DENIED; | |
707 | ||
90d51b02 | 708 | switch (cache_check(sn->ip_map_cache, &ipm->h, &rqstp->rq_chandle)) { |
1da177e4 LT |
709 | default: |
710 | BUG(); | |
e0bb89ef | 711 | case -ETIMEDOUT: |
1ebede86 N |
712 | return SVC_CLOSE; |
713 | case -EAGAIN: | |
1da177e4 LT |
714 | return SVC_DROP; |
715 | case -ENOENT: | |
716 | return SVC_DENIED; | |
717 | case 0: | |
718 | rqstp->rq_client = &ipm->m_client->h; | |
efc36aa5 | 719 | kref_get(&rqstp->rq_client->ref); |
3be4479f | 720 | ip_map_cached_put(xprt, ipm); |
1da177e4 LT |
721 | break; |
722 | } | |
dc83d6e2 BF |
723 | |
724 | gi = unix_gid_find(cred->cr_uid, rqstp); | |
725 | switch (PTR_ERR(gi)) { | |
726 | case -EAGAIN: | |
727 | return SVC_DROP; | |
1ebede86 N |
728 | case -ESHUTDOWN: |
729 | return SVC_CLOSE; | |
dc83d6e2 BF |
730 | case -ENOENT: |
731 | break; | |
732 | default: | |
733 | put_group_info(cred->cr_group_info); | |
734 | cred->cr_group_info = gi; | |
735 | } | |
1da177e4 LT |
736 | return SVC_OK; |
737 | } | |
738 | ||
24c3767e | 739 | EXPORT_SYMBOL_GPL(svcauth_unix_set_client); |
3ab4d8b1 | 740 | |
1da177e4 | 741 | static int |
d8ed029d | 742 | svcauth_null_accept(struct svc_rqst *rqstp, __be32 *authp) |
1da177e4 LT |
743 | { |
744 | struct kvec *argv = &rqstp->rq_arg.head[0]; | |
745 | struct kvec *resv = &rqstp->rq_res.head[0]; | |
746 | struct svc_cred *cred = &rqstp->rq_cred; | |
747 | ||
748 | cred->cr_group_info = NULL; | |
03a4e1f6 | 749 | cred->cr_principal = NULL; |
1da177e4 LT |
750 | rqstp->rq_client = NULL; |
751 | ||
752 | if (argv->iov_len < 3*4) | |
753 | return SVC_GARBAGE; | |
754 | ||
cca5172a | 755 | if (svc_getu32(argv) != 0) { |
1da177e4 LT |
756 | dprintk("svc: bad null cred\n"); |
757 | *authp = rpc_autherr_badcred; | |
758 | return SVC_DENIED; | |
759 | } | |
76994313 | 760 | if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) { |
1da177e4 LT |
761 | dprintk("svc: bad null verf\n"); |
762 | *authp = rpc_autherr_badverf; | |
763 | return SVC_DENIED; | |
764 | } | |
765 | ||
766 | /* Signal that mapping to nobody uid/gid is required */ | |
767 | cred->cr_uid = (uid_t) -1; | |
768 | cred->cr_gid = (gid_t) -1; | |
769 | cred->cr_group_info = groups_alloc(0); | |
770 | if (cred->cr_group_info == NULL) | |
1ebede86 | 771 | return SVC_CLOSE; /* kmalloc failure - client must retry */ |
1da177e4 LT |
772 | |
773 | /* Put NULL verifier */ | |
76994313 AD |
774 | svc_putnl(resv, RPC_AUTH_NULL); |
775 | svc_putnl(resv, 0); | |
1da177e4 | 776 | |
d5497fc6 | 777 | rqstp->rq_cred.cr_flavor = RPC_AUTH_NULL; |
1da177e4 LT |
778 | return SVC_OK; |
779 | } | |
780 | ||
781 | static int | |
782 | svcauth_null_release(struct svc_rqst *rqstp) | |
783 | { | |
784 | if (rqstp->rq_client) | |
785 | auth_domain_put(rqstp->rq_client); | |
786 | rqstp->rq_client = NULL; | |
787 | if (rqstp->rq_cred.cr_group_info) | |
788 | put_group_info(rqstp->rq_cred.cr_group_info); | |
789 | rqstp->rq_cred.cr_group_info = NULL; | |
790 | ||
791 | return 0; /* don't drop */ | |
792 | } | |
793 | ||
794 | ||
795 | struct auth_ops svcauth_null = { | |
796 | .name = "null", | |
797 | .owner = THIS_MODULE, | |
798 | .flavour = RPC_AUTH_NULL, | |
799 | .accept = svcauth_null_accept, | |
800 | .release = svcauth_null_release, | |
801 | .set_client = svcauth_unix_set_client, | |
802 | }; | |
803 | ||
804 | ||
805 | static int | |
d8ed029d | 806 | svcauth_unix_accept(struct svc_rqst *rqstp, __be32 *authp) |
1da177e4 LT |
807 | { |
808 | struct kvec *argv = &rqstp->rq_arg.head[0]; | |
809 | struct kvec *resv = &rqstp->rq_res.head[0]; | |
810 | struct svc_cred *cred = &rqstp->rq_cred; | |
811 | u32 slen, i; | |
812 | int len = argv->iov_len; | |
813 | ||
814 | cred->cr_group_info = NULL; | |
03a4e1f6 | 815 | cred->cr_principal = NULL; |
1da177e4 LT |
816 | rqstp->rq_client = NULL; |
817 | ||
818 | if ((len -= 3*4) < 0) | |
819 | return SVC_GARBAGE; | |
820 | ||
821 | svc_getu32(argv); /* length */ | |
822 | svc_getu32(argv); /* time stamp */ | |
76994313 | 823 | slen = XDR_QUADLEN(svc_getnl(argv)); /* machname length */ |
1da177e4 LT |
824 | if (slen > 64 || (len -= (slen + 3)*4) < 0) |
825 | goto badcred; | |
d8ed029d | 826 | argv->iov_base = (void*)((__be32*)argv->iov_base + slen); /* skip machname */ |
1da177e4 LT |
827 | argv->iov_len -= slen*4; |
828 | ||
76994313 AD |
829 | cred->cr_uid = svc_getnl(argv); /* uid */ |
830 | cred->cr_gid = svc_getnl(argv); /* gid */ | |
831 | slen = svc_getnl(argv); /* gids length */ | |
1da177e4 LT |
832 | if (slen > 16 || (len -= (slen + 2)*4) < 0) |
833 | goto badcred; | |
dc83d6e2 BF |
834 | cred->cr_group_info = groups_alloc(slen); |
835 | if (cred->cr_group_info == NULL) | |
1ebede86 | 836 | return SVC_CLOSE; |
ae2975bc EB |
837 | for (i = 0; i < slen; i++) { |
838 | kgid_t kgid = make_kgid(&init_user_ns, svc_getnl(argv)); | |
839 | if (!gid_valid(kgid)) | |
840 | goto badcred; | |
841 | GROUP_AT(cred->cr_group_info, i) = kgid; | |
842 | } | |
76994313 | 843 | if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) { |
1da177e4 LT |
844 | *authp = rpc_autherr_badverf; |
845 | return SVC_DENIED; | |
846 | } | |
847 | ||
848 | /* Put NULL verifier */ | |
76994313 AD |
849 | svc_putnl(resv, RPC_AUTH_NULL); |
850 | svc_putnl(resv, 0); | |
1da177e4 | 851 | |
d5497fc6 | 852 | rqstp->rq_cred.cr_flavor = RPC_AUTH_UNIX; |
1da177e4 LT |
853 | return SVC_OK; |
854 | ||
855 | badcred: | |
856 | *authp = rpc_autherr_badcred; | |
857 | return SVC_DENIED; | |
858 | } | |
859 | ||
860 | static int | |
861 | svcauth_unix_release(struct svc_rqst *rqstp) | |
862 | { | |
863 | /* Verifier (such as it is) is already in place. | |
864 | */ | |
865 | if (rqstp->rq_client) | |
866 | auth_domain_put(rqstp->rq_client); | |
867 | rqstp->rq_client = NULL; | |
868 | if (rqstp->rq_cred.cr_group_info) | |
869 | put_group_info(rqstp->rq_cred.cr_group_info); | |
870 | rqstp->rq_cred.cr_group_info = NULL; | |
871 | ||
872 | return 0; | |
873 | } | |
874 | ||
875 | ||
876 | struct auth_ops svcauth_unix = { | |
877 | .name = "unix", | |
878 | .owner = THIS_MODULE, | |
879 | .flavour = RPC_AUTH_UNIX, | |
880 | .accept = svcauth_unix_accept, | |
881 | .release = svcauth_unix_release, | |
882 | .domain_release = svcauth_unix_domain_release, | |
883 | .set_client = svcauth_unix_set_client, | |
884 | }; | |
885 | ||
d05cc104 SK |
886 | static struct cache_detail ip_map_cache_template = { |
887 | .owner = THIS_MODULE, | |
888 | .hash_size = IP_HASHMAX, | |
889 | .name = "auth.unix.ip", | |
890 | .cache_put = ip_map_put, | |
891 | .cache_upcall = ip_map_upcall, | |
892 | .cache_parse = ip_map_parse, | |
893 | .cache_show = ip_map_show, | |
894 | .match = ip_map_match, | |
895 | .init = ip_map_init, | |
896 | .update = update, | |
897 | .alloc = ip_map_alloc, | |
898 | }; | |
899 | ||
90d51b02 PE |
900 | int ip_map_cache_create(struct net *net) |
901 | { | |
90d51b02 | 902 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
d05cc104 SK |
903 | struct cache_detail *cd; |
904 | int err; | |
90d51b02 | 905 | |
d05cc104 SK |
906 | cd = cache_create_net(&ip_map_cache_template, net); |
907 | if (IS_ERR(cd)) | |
908 | return PTR_ERR(cd); | |
90d51b02 | 909 | err = cache_register_net(cd, net); |
d05cc104 SK |
910 | if (err) { |
911 | cache_destroy_net(cd, net); | |
912 | return err; | |
913 | } | |
90d51b02 PE |
914 | sn->ip_map_cache = cd; |
915 | return 0; | |
90d51b02 PE |
916 | } |
917 | ||
918 | void ip_map_cache_destroy(struct net *net) | |
919 | { | |
d05cc104 SK |
920 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
921 | struct cache_detail *cd = sn->ip_map_cache; | |
90d51b02 | 922 | |
d05cc104 SK |
923 | sn->ip_map_cache = NULL; |
924 | cache_purge(cd); | |
925 | cache_unregister_net(cd, net); | |
926 | cache_destroy_net(cd, net); | |
90d51b02 | 927 | } |