blob: 521d8f7dc833ac769afe83daf0b03fe818c5be32 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#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>
Andy Adamsonc4170582007-07-17 04:04:42 -07008#include <linux/sunrpc/gss_api.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include <linux/err.h>
10#include <linux/seq_file.h>
11#include <linux/hash.h>
Paulo Marques543537b2005-06-23 00:09:02 -070012#include <linux/string.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090013#include <linux/slab.h>
Greg Banks7b2b1fe2006-10-04 02:15:50 -070014#include <net/sock.h>
Aurélien Charbonf15364b2008-01-18 15:50:56 +010015#include <net/ipv6.h>
16#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#define RPCDBG_FACILITY RPCDBG_AUTH
18
Chuck Lever07396052010-01-26 14:03:47 -050019#include <linux/sunrpc/clnt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020
Pavel Emelyanov90d51b02010-09-27 14:02:29 +040021#include "netns.h"
22
Linus Torvalds1da177e2005-04-16 15:20:36 -070023/*
24 * AUTHUNIX and AUTHNULL credentials are both handled here.
25 * AUTHNULL is treated just like AUTHUNIX except that the uid/gid
26 * are always nobody (-2). i.e. we do the same IP address checks for
27 * AUTHNULL as for AUTHUNIX, and that is done here.
28 */
29
30
Linus Torvalds1da177e2005-04-16 15:20:36 -070031struct unix_domain {
32 struct auth_domain h;
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 /* other stuff later */
34};
35
H Hartley Sweeten13e0e952011-06-20 18:19:12 -070036extern struct auth_ops svcauth_null;
NeilBrownefc36aa2006-03-27 01:14:59 -080037extern struct auth_ops svcauth_unix;
38
J. Bruce Fields8b3e07a2011-03-07 22:50:47 -050039static void svcauth_unix_domain_release(struct auth_domain *dom)
40{
41 struct unix_domain *ud = container_of(dom, struct unix_domain, h);
42
43 kfree(dom->name);
44 kfree(ud);
45}
46
Linus Torvalds1da177e2005-04-16 15:20:36 -070047struct auth_domain *unix_domain_find(char *name)
48{
NeilBrownefc36aa2006-03-27 01:14:59 -080049 struct auth_domain *rv;
50 struct unix_domain *new = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
NeilBrownefc36aa2006-03-27 01:14:59 -080052 rv = auth_domain_lookup(name, NULL);
53 while(1) {
NeilBrownad1b5222006-03-27 01:15:11 -080054 if (rv) {
55 if (new && rv != &new->h)
J. Bruce Fields352b5d12011-03-09 22:40:30 -050056 svcauth_unix_domain_release(&new->h);
NeilBrownad1b5222006-03-27 01:15:11 -080057
58 if (rv->flavour != &svcauth_unix) {
59 auth_domain_put(rv);
60 return NULL;
61 }
NeilBrownefc36aa2006-03-27 01:14:59 -080062 return rv;
63 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
NeilBrownefc36aa2006-03-27 01:14:59 -080065 new = kmalloc(sizeof(*new), GFP_KERNEL);
66 if (new == NULL)
67 return NULL;
68 kref_init(&new->h.ref);
69 new->h.name = kstrdup(name, GFP_KERNEL);
NeilBrowndd08d6e2006-12-13 00:35:44 -080070 if (new->h.name == NULL) {
71 kfree(new);
72 return NULL;
73 }
NeilBrownefc36aa2006-03-27 01:14:59 -080074 new->h.flavour = &svcauth_unix;
NeilBrownefc36aa2006-03-27 01:14:59 -080075 rv = auth_domain_lookup(name, &new->h);
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070077}
Trond Myklebust24c37672008-12-23 16:30:12 -050078EXPORT_SYMBOL_GPL(unix_domain_find);
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
Linus Torvalds1da177e2005-04-16 15:20:36 -070080
81/**************************************************
82 * cache for IP address to unix_domain
83 * as needed by AUTH_UNIX
84 */
85#define IP_HASHBITS 8
86#define IP_HASHMAX (1<<IP_HASHBITS)
Linus Torvalds1da177e2005-04-16 15:20:36 -070087
88struct ip_map {
89 struct cache_head h;
90 char m_class[8]; /* e.g. "nfsd" */
Aurélien Charbonf15364b2008-01-18 15:50:56 +010091 struct in6_addr m_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 struct unix_domain *m_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -070093};
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
NeilBrownbaab9352006-03-27 01:15:09 -080095static void ip_map_put(struct kref *kref)
Linus Torvalds1da177e2005-04-16 15:20:36 -070096{
NeilBrownbaab9352006-03-27 01:15:09 -080097 struct cache_head *item = container_of(kref, struct cache_head, ref);
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 struct ip_map *im = container_of(item, struct ip_map,h);
NeilBrownbaab9352006-03-27 01:15:09 -080099
100 if (test_bit(CACHE_VALID, &item->flags) &&
101 !test_bit(CACHE_NEGATIVE, &item->flags))
102 auth_domain_put(&im->m_client->h);
103 kfree(im);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104}
105
NeilBrown1f1e0302006-01-06 00:09:49 -0800106#if IP_HASHBITS == 8
107/* hash_long on a 64 bit machine is currently REALLY BAD for
108 * IP addresses in reverse-endian (i.e. on a little-endian machine).
109 * So use a trivial but reliable hash instead
110 */
Al Viro48061262006-11-08 00:22:34 -0800111static inline int hash_ip(__be32 ip)
NeilBrown1f1e0302006-01-06 00:09:49 -0800112{
Al Viro48061262006-11-08 00:22:34 -0800113 int hash = (__force u32)ip ^ ((__force u32)ip>>16);
NeilBrown1f1e0302006-01-06 00:09:49 -0800114 return (hash ^ (hash>>8)) & 0xff;
115}
116#endif
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100117static inline int hash_ip6(struct in6_addr ip)
118{
119 return (hash_ip(ip.s6_addr32[0]) ^
120 hash_ip(ip.s6_addr32[1]) ^
121 hash_ip(ip.s6_addr32[2]) ^
122 hash_ip(ip.s6_addr32[3]));
123}
NeilBrown1a9917c2006-03-27 01:15:02 -0800124static int ip_map_match(struct cache_head *corig, struct cache_head *cnew)
125{
126 struct ip_map *orig = container_of(corig, struct ip_map, h);
127 struct ip_map *new = container_of(cnew, struct ip_map, h);
Joe Perchesf64f9e72009-11-29 16:55:45 -0800128 return strcmp(orig->m_class, new->m_class) == 0 &&
129 ipv6_addr_equal(&orig->m_addr, &new->m_addr);
NeilBrown1a9917c2006-03-27 01:15:02 -0800130}
131static void ip_map_init(struct cache_head *cnew, struct cache_head *citem)
132{
133 struct ip_map *new = container_of(cnew, struct ip_map, h);
134 struct ip_map *item = container_of(citem, struct ip_map, h);
NeilBrown1f1e0302006-01-06 00:09:49 -0800135
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 strcpy(new->m_class, item->m_class);
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000137 new->m_addr = item->m_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138}
NeilBrown1a9917c2006-03-27 01:15:02 -0800139static void update(struct cache_head *cnew, struct cache_head *citem)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140{
NeilBrown1a9917c2006-03-27 01:15:02 -0800141 struct ip_map *new = container_of(cnew, struct ip_map, h);
142 struct ip_map *item = container_of(citem, struct ip_map, h);
143
NeilBrownefc36aa2006-03-27 01:14:59 -0800144 kref_get(&item->m_client->h.ref);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 new->m_client = item->m_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146}
NeilBrown1a9917c2006-03-27 01:15:02 -0800147static struct cache_head *ip_map_alloc(void)
148{
149 struct ip_map *i = kmalloc(sizeof(*i), GFP_KERNEL);
150 if (i)
151 return &i->h;
152 else
153 return NULL;
154}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
156static void ip_map_request(struct cache_detail *cd,
157 struct cache_head *h,
158 char **bpp, int *blen)
159{
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100160 char text_addr[40];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 struct ip_map *im = container_of(h, struct ip_map, h);
YOSHIFUJI Hideakicca51722007-02-09 15:38:13 -0800162
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100163 if (ipv6_addr_v4mapped(&(im->m_addr))) {
Harvey Harrison21454aa2008-10-31 00:54:56 -0700164 snprintf(text_addr, 20, "%pI4", &im->m_addr.s6_addr32[3]);
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100165 } else {
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700166 snprintf(text_addr, 40, "%pI6", &im->m_addr);
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100167 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 qword_add(bpp, blen, im->m_class);
169 qword_add(bpp, blen, text_addr);
170 (*bpp)[-1] = '\n';
171}
172
Trond Myklebustbc74b4f2009-08-09 15:14:29 -0400173static int ip_map_upcall(struct cache_detail *cd, struct cache_head *h)
174{
175 return sunrpc_cache_pipe_upcall(cd, h, ip_map_request);
176}
177
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400178static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, struct in6_addr *addr);
179static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm, struct unix_domain *udom, time_t expiry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180
181static int ip_map_parse(struct cache_detail *cd,
182 char *mesg, int mlen)
183{
184 /* class ipaddress [domainname] */
185 /* should be safe just to use the start of the input buffer
186 * for scratch: */
187 char *buf = mesg;
188 int len;
NeilBrown1a9917c2006-03-27 01:15:02 -0800189 char class[8];
Chuck Lever07396052010-01-26 14:03:47 -0500190 union {
191 struct sockaddr sa;
192 struct sockaddr_in s4;
193 struct sockaddr_in6 s6;
194 } address;
195 struct sockaddr_in6 sin6;
NeilBrown1a9917c2006-03-27 01:15:02 -0800196 int err;
197
198 struct ip_map *ipmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 struct auth_domain *dom;
200 time_t expiry;
201
202 if (mesg[mlen-1] != '\n')
203 return -EINVAL;
204 mesg[mlen-1] = 0;
205
206 /* class */
NeilBrown1a9917c2006-03-27 01:15:02 -0800207 len = qword_get(&mesg, class, sizeof(class));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 if (len <= 0) return -EINVAL;
209
210 /* ip address */
211 len = qword_get(&mesg, buf, mlen);
212 if (len <= 0) return -EINVAL;
213
Stanislav Kinsburskyd05cc10402012-01-19 21:42:45 +0400214 if (rpc_pton(cd->net, buf, len, &address.sa, sizeof(address)) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 return -EINVAL;
Chuck Lever07396052010-01-26 14:03:47 -0500216 switch (address.sa.sa_family) {
217 case AF_INET:
218 /* Form a mapped IPv4 address in sin6 */
Chuck Lever07396052010-01-26 14:03:47 -0500219 sin6.sin6_family = AF_INET6;
Pavel Emelyanov70dc78d2010-10-05 20:48:02 +0400220 ipv6_addr_set_v4mapped(address.s4.sin_addr.s_addr,
221 &sin6.sin6_addr);
Chuck Lever07396052010-01-26 14:03:47 -0500222 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000223#if IS_ENABLED(CONFIG_IPV6)
Chuck Lever07396052010-01-26 14:03:47 -0500224 case AF_INET6:
225 memcpy(&sin6, &address.s6, sizeof(sin6));
226 break;
227#endif
228 default:
229 return -EINVAL;
230 }
YOSHIFUJI Hideakicca51722007-02-09 15:38:13 -0800231
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 expiry = get_expiry(&mesg);
233 if (expiry ==0)
234 return -EINVAL;
235
236 /* domainname, or empty for NEGATIVE */
237 len = qword_get(&mesg, buf, mlen);
238 if (len < 0) return -EINVAL;
239
240 if (len) {
241 dom = unix_domain_find(buf);
242 if (dom == NULL)
243 return -ENOENT;
244 } else
245 dom = NULL;
246
Chuck Lever07396052010-01-26 14:03:47 -0500247 /* IPv6 scope IDs are ignored for now */
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400248 ipmp = __ip_map_lookup(cd, class, &sin6.sin6_addr);
NeilBrown1a9917c2006-03-27 01:15:02 -0800249 if (ipmp) {
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400250 err = __ip_map_update(cd, ipmp,
NeilBrown1a9917c2006-03-27 01:15:02 -0800251 container_of(dom, struct unix_domain, h),
252 expiry);
253 } else
254 err = -ENOMEM;
255
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 if (dom)
257 auth_domain_put(dom);
NeilBrown1a9917c2006-03-27 01:15:02 -0800258
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 cache_flush();
NeilBrown1a9917c2006-03-27 01:15:02 -0800260 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261}
262
263static int ip_map_show(struct seq_file *m,
264 struct cache_detail *cd,
265 struct cache_head *h)
266{
267 struct ip_map *im;
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100268 struct in6_addr addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 char *dom = "-no-domain-";
270
271 if (h == NULL) {
272 seq_puts(m, "#class IP domain\n");
273 return 0;
274 }
275 im = container_of(h, struct ip_map, h);
276 /* class addr domain */
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000277 addr = im->m_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278
YOSHIFUJI Hideakicca51722007-02-09 15:38:13 -0800279 if (test_bit(CACHE_VALID, &h->flags) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 !test_bit(CACHE_NEGATIVE, &h->flags))
281 dom = im->m_client->h.name;
282
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100283 if (ipv6_addr_v4mapped(&addr)) {
Harvey Harrison21454aa2008-10-31 00:54:56 -0700284 seq_printf(m, "%s %pI4 %s\n",
285 im->m_class, &addr.s6_addr32[3], dom);
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100286 } else {
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700287 seq_printf(m, "%s %pI6 %s\n", im->m_class, &addr, dom);
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100288 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 return 0;
290}
YOSHIFUJI Hideakicca51722007-02-09 15:38:13 -0800291
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400293static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class,
294 struct in6_addr *addr)
NeilBrown1a9917c2006-03-27 01:15:02 -0800295{
296 struct ip_map ip;
297 struct cache_head *ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298
NeilBrown1a9917c2006-03-27 01:15:02 -0800299 strcpy(ip.m_class, class);
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000300 ip.m_addr = *addr;
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400301 ch = sunrpc_cache_lookup(cd, &ip.h,
NeilBrown1a9917c2006-03-27 01:15:02 -0800302 hash_str(class, IP_HASHBITS) ^
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100303 hash_ip6(*addr));
NeilBrown1a9917c2006-03-27 01:15:02 -0800304
305 if (ch)
306 return container_of(ch, struct ip_map, h);
307 else
308 return NULL;
309}
310
Pavel Emelyanov352114f2010-09-27 13:59:48 +0400311static inline struct ip_map *ip_map_lookup(struct net *net, char *class,
312 struct in6_addr *addr)
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400313{
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400314 struct sunrpc_net *sn;
315
316 sn = net_generic(net, sunrpc_net_id);
317 return __ip_map_lookup(sn->ip_map_cache, class, addr);
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400318}
319
320static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm,
321 struct unix_domain *udom, time_t expiry)
NeilBrown1a9917c2006-03-27 01:15:02 -0800322{
323 struct ip_map ip;
324 struct cache_head *ch;
325
326 ip.m_client = udom;
327 ip.h.flags = 0;
328 if (!udom)
329 set_bit(CACHE_NEGATIVE, &ip.h.flags);
NeilBrown1a9917c2006-03-27 01:15:02 -0800330 ip.h.expiry_time = expiry;
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400331 ch = sunrpc_cache_update(cd, &ip.h, &ipm->h,
NeilBrown1a9917c2006-03-27 01:15:02 -0800332 hash_str(ipm->m_class, IP_HASHBITS) ^
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100333 hash_ip6(ipm->m_addr));
NeilBrown1a9917c2006-03-27 01:15:02 -0800334 if (!ch)
335 return -ENOMEM;
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400336 cache_put(ch, cd);
NeilBrown1a9917c2006-03-27 01:15:02 -0800337 return 0;
338}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
Pavel Emelyanov352114f2010-09-27 13:59:48 +0400340static inline int ip_map_update(struct net *net, struct ip_map *ipm,
341 struct unix_domain *udom, time_t expiry)
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400342{
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400343 struct sunrpc_net *sn;
344
345 sn = net_generic(net, sunrpc_net_id);
346 return __ip_map_update(sn->ip_map_cache, ipm, udom, expiry);
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400347}
348
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
350void svcauth_unix_purge(void)
351{
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400352 struct net *net;
353
354 for_each_net(net) {
355 struct sunrpc_net *sn;
356
357 sn = net_generic(net, sunrpc_net_id);
358 cache_purge(sn->ip_map_cache);
359 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360}
Trond Myklebust24c37672008-12-23 16:30:12 -0500361EXPORT_SYMBOL_GPL(svcauth_unix_purge);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362
Greg Banks7b2b1fe2006-10-04 02:15:50 -0700363static inline struct ip_map *
Pavel Emelyanov3be44792010-09-27 13:59:13 +0400364ip_map_cached_get(struct svc_xprt *xprt)
Greg Banks7b2b1fe2006-10-04 02:15:50 -0700365{
Tom Tuckerdef13d72007-12-30 21:08:08 -0600366 struct ip_map *ipm = NULL;
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400367 struct sunrpc_net *sn;
Tom Tuckerdef13d72007-12-30 21:08:08 -0600368
369 if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) {
370 spin_lock(&xprt->xpt_lock);
371 ipm = xprt->xpt_auth_cache;
372 if (ipm != NULL) {
373 if (!cache_valid(&ipm->h)) {
374 /*
375 * The entry has been invalidated since it was
376 * remembered, e.g. by a second mount from the
377 * same IP address.
378 */
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400379 sn = net_generic(xprt->xpt_net, sunrpc_net_id);
Tom Tuckerdef13d72007-12-30 21:08:08 -0600380 xprt->xpt_auth_cache = NULL;
381 spin_unlock(&xprt->xpt_lock);
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400382 cache_put(&ipm->h, sn->ip_map_cache);
Tom Tuckerdef13d72007-12-30 21:08:08 -0600383 return NULL;
384 }
385 cache_get(&ipm->h);
Greg Banks7b2b1fe2006-10-04 02:15:50 -0700386 }
Tom Tuckerdef13d72007-12-30 21:08:08 -0600387 spin_unlock(&xprt->xpt_lock);
Greg Banks7b2b1fe2006-10-04 02:15:50 -0700388 }
389 return ipm;
390}
391
392static inline void
Pavel Emelyanov3be44792010-09-27 13:59:13 +0400393ip_map_cached_put(struct svc_xprt *xprt, struct ip_map *ipm)
Greg Banks7b2b1fe2006-10-04 02:15:50 -0700394{
Tom Tuckerdef13d72007-12-30 21:08:08 -0600395 if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) {
396 spin_lock(&xprt->xpt_lock);
397 if (xprt->xpt_auth_cache == NULL) {
398 /* newly cached, keep the reference */
399 xprt->xpt_auth_cache = ipm;
400 ipm = NULL;
401 }
402 spin_unlock(&xprt->xpt_lock);
NeilBrown30f3dee2007-04-16 22:53:25 -0700403 }
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400404 if (ipm) {
405 struct sunrpc_net *sn;
406
407 sn = net_generic(xprt->xpt_net, sunrpc_net_id);
408 cache_put(&ipm->h, sn->ip_map_cache);
409 }
Greg Banks7b2b1fe2006-10-04 02:15:50 -0700410}
411
412void
Pavel Emelyanove3bfca02010-09-27 13:58:42 +0400413svcauth_unix_info_release(struct svc_xprt *xpt)
Greg Banks7b2b1fe2006-10-04 02:15:50 -0700414{
Pavel Emelyanove3bfca02010-09-27 13:58:42 +0400415 struct ip_map *ipm;
416
417 ipm = xpt->xpt_auth_cache;
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400418 if (ipm != NULL) {
419 struct sunrpc_net *sn;
420
421 sn = net_generic(xpt->xpt_net, sunrpc_net_id);
422 cache_put(&ipm->h, sn->ip_map_cache);
423 }
Greg Banks7b2b1fe2006-10-04 02:15:50 -0700424}
425
NeilBrown3fc605a2007-02-14 00:33:13 -0800426/****************************************************************************
427 * auth.unix.gid cache
428 * simple cache to map a UID to a list of GIDs
429 * because AUTH_UNIX aka AUTH_SYS has a max of 16
430 */
431#define GID_HASHBITS 8
432#define GID_HASHMAX (1<<GID_HASHBITS)
NeilBrown3fc605a2007-02-14 00:33:13 -0800433
434struct unix_gid {
435 struct cache_head h;
436 uid_t uid;
437 struct group_info *gi;
438};
NeilBrown3fc605a2007-02-14 00:33:13 -0800439
440static void unix_gid_put(struct kref *kref)
441{
442 struct cache_head *item = container_of(kref, struct cache_head, ref);
443 struct unix_gid *ug = container_of(item, struct unix_gid, h);
444 if (test_bit(CACHE_VALID, &item->flags) &&
445 !test_bit(CACHE_NEGATIVE, &item->flags))
446 put_group_info(ug->gi);
447 kfree(ug);
448}
449
450static int unix_gid_match(struct cache_head *corig, struct cache_head *cnew)
451{
452 struct unix_gid *orig = container_of(corig, struct unix_gid, h);
453 struct unix_gid *new = container_of(cnew, struct unix_gid, h);
454 return orig->uid == new->uid;
455}
456static void unix_gid_init(struct cache_head *cnew, struct cache_head *citem)
457{
458 struct unix_gid *new = container_of(cnew, struct unix_gid, h);
459 struct unix_gid *item = container_of(citem, struct unix_gid, h);
460 new->uid = item->uid;
461}
462static void unix_gid_update(struct cache_head *cnew, struct cache_head *citem)
463{
464 struct unix_gid *new = container_of(cnew, struct unix_gid, h);
465 struct unix_gid *item = container_of(citem, struct unix_gid, h);
466
467 get_group_info(item->gi);
468 new->gi = item->gi;
469}
470static struct cache_head *unix_gid_alloc(void)
471{
472 struct unix_gid *g = kmalloc(sizeof(*g), GFP_KERNEL);
473 if (g)
474 return &g->h;
475 else
476 return NULL;
477}
478
479static void unix_gid_request(struct cache_detail *cd,
480 struct cache_head *h,
481 char **bpp, int *blen)
482{
483 char tuid[20];
484 struct unix_gid *ug = container_of(h, struct unix_gid, h);
485
486 snprintf(tuid, 20, "%u", ug->uid);
487 qword_add(bpp, blen, tuid);
488 (*bpp)[-1] = '\n';
489}
490
Trond Myklebustbc74b4f2009-08-09 15:14:29 -0400491static int unix_gid_upcall(struct cache_detail *cd, struct cache_head *h)
492{
493 return sunrpc_cache_pipe_upcall(cd, h, unix_gid_request);
494}
495
Stanislav Kinsbursky73393232012-01-19 21:42:29 +0400496static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, uid_t uid);
NeilBrown3fc605a2007-02-14 00:33:13 -0800497
498static int unix_gid_parse(struct cache_detail *cd,
499 char *mesg, int mlen)
500{
501 /* uid expiry Ngid gid0 gid1 ... gidN-1 */
502 int uid;
503 int gids;
504 int rv;
505 int i;
506 int err;
507 time_t expiry;
508 struct unix_gid ug, *ugp;
509
Dan Carpenter34769642012-01-20 10:48:18 +0300510 if (mesg[mlen - 1] != '\n')
NeilBrown3fc605a2007-02-14 00:33:13 -0800511 return -EINVAL;
512 mesg[mlen-1] = 0;
513
514 rv = get_int(&mesg, &uid);
515 if (rv)
516 return -EINVAL;
517 ug.uid = uid;
518
519 expiry = get_expiry(&mesg);
520 if (expiry == 0)
521 return -EINVAL;
522
523 rv = get_int(&mesg, &gids);
524 if (rv || gids < 0 || gids > 8192)
525 return -EINVAL;
526
527 ug.gi = groups_alloc(gids);
528 if (!ug.gi)
529 return -ENOMEM;
530
531 for (i = 0 ; i < gids ; i++) {
532 int gid;
533 rv = get_int(&mesg, &gid);
534 err = -EINVAL;
535 if (rv)
536 goto out;
537 GROUP_AT(ug.gi, i) = gid;
538 }
539
Stanislav Kinsbursky73393232012-01-19 21:42:29 +0400540 ugp = unix_gid_lookup(cd, uid);
NeilBrown3fc605a2007-02-14 00:33:13 -0800541 if (ugp) {
542 struct cache_head *ch;
543 ug.h.flags = 0;
544 ug.h.expiry_time = expiry;
Stanislav Kinsbursky73393232012-01-19 21:42:29 +0400545 ch = sunrpc_cache_update(cd,
NeilBrown3fc605a2007-02-14 00:33:13 -0800546 &ug.h, &ugp->h,
547 hash_long(uid, GID_HASHBITS));
548 if (!ch)
549 err = -ENOMEM;
550 else {
551 err = 0;
Stanislav Kinsbursky73393232012-01-19 21:42:29 +0400552 cache_put(ch, cd);
NeilBrown3fc605a2007-02-14 00:33:13 -0800553 }
554 } else
555 err = -ENOMEM;
556 out:
557 if (ug.gi)
558 put_group_info(ug.gi);
559 return err;
560}
561
562static int unix_gid_show(struct seq_file *m,
563 struct cache_detail *cd,
564 struct cache_head *h)
565{
566 struct unix_gid *ug;
567 int i;
568 int glen;
569
570 if (h == NULL) {
571 seq_puts(m, "#uid cnt: gids...\n");
572 return 0;
573 }
574 ug = container_of(h, struct unix_gid, h);
575 if (test_bit(CACHE_VALID, &h->flags) &&
576 !test_bit(CACHE_NEGATIVE, &h->flags))
577 glen = ug->gi->ngroups;
578 else
579 glen = 0;
580
J. Bruce Fieldsccdb3572010-03-02 15:49:21 -0500581 seq_printf(m, "%u %d:", ug->uid, glen);
NeilBrown3fc605a2007-02-14 00:33:13 -0800582 for (i = 0; i < glen; i++)
583 seq_printf(m, " %d", GROUP_AT(ug->gi, i));
584 seq_printf(m, "\n");
585 return 0;
586}
587
Stanislav Kinsbursky73393232012-01-19 21:42:29 +0400588static struct cache_detail unix_gid_cache_template = {
NeilBrown3fc605a2007-02-14 00:33:13 -0800589 .owner = THIS_MODULE,
590 .hash_size = GID_HASHMAX,
NeilBrown3fc605a2007-02-14 00:33:13 -0800591 .name = "auth.unix.gid",
592 .cache_put = unix_gid_put,
Trond Myklebustbc74b4f2009-08-09 15:14:29 -0400593 .cache_upcall = unix_gid_upcall,
NeilBrown3fc605a2007-02-14 00:33:13 -0800594 .cache_parse = unix_gid_parse,
595 .cache_show = unix_gid_show,
596 .match = unix_gid_match,
597 .init = unix_gid_init,
598 .update = unix_gid_update,
599 .alloc = unix_gid_alloc,
600};
601
Stanislav Kinsbursky73393232012-01-19 21:42:29 +0400602int unix_gid_cache_create(struct net *net)
603{
604 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
605 struct cache_detail *cd;
606 int err;
607
608 cd = cache_create_net(&unix_gid_cache_template, net);
609 if (IS_ERR(cd))
610 return PTR_ERR(cd);
611 err = cache_register_net(cd, net);
612 if (err) {
613 cache_destroy_net(cd, net);
614 return err;
615 }
616 sn->unix_gid_cache = cd;
617 return 0;
618}
619
620void unix_gid_cache_destroy(struct net *net)
621{
622 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
623 struct cache_detail *cd = sn->unix_gid_cache;
624
625 sn->unix_gid_cache = NULL;
626 cache_purge(cd);
627 cache_unregister_net(cd, net);
628 cache_destroy_net(cd, net);
629}
630
631static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, uid_t uid)
NeilBrown3fc605a2007-02-14 00:33:13 -0800632{
633 struct unix_gid ug;
634 struct cache_head *ch;
635
636 ug.uid = uid;
Stanislav Kinsbursky73393232012-01-19 21:42:29 +0400637 ch = sunrpc_cache_lookup(cd, &ug.h, hash_long(uid, GID_HASHBITS));
NeilBrown3fc605a2007-02-14 00:33:13 -0800638 if (ch)
639 return container_of(ch, struct unix_gid, h);
640 else
641 return NULL;
642}
643
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400644static struct group_info *unix_gid_find(uid_t uid, struct svc_rqst *rqstp)
NeilBrown3fc605a2007-02-14 00:33:13 -0800645{
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400646 struct unix_gid *ug;
647 struct group_info *gi;
648 int ret;
Stanislav Kinsbursky73393232012-01-19 21:42:29 +0400649 struct sunrpc_net *sn = net_generic(rqstp->rq_xprt->xpt_net,
650 sunrpc_net_id);
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400651
Stanislav Kinsbursky73393232012-01-19 21:42:29 +0400652 ug = unix_gid_lookup(sn->unix_gid_cache, uid);
NeilBrown3fc605a2007-02-14 00:33:13 -0800653 if (!ug)
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400654 return ERR_PTR(-EAGAIN);
Stanislav Kinsbursky73393232012-01-19 21:42:29 +0400655 ret = cache_check(sn->unix_gid_cache, &ug->h, &rqstp->rq_chandle);
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400656 switch (ret) {
NeilBrown3fc605a2007-02-14 00:33:13 -0800657 case -ENOENT:
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400658 return ERR_PTR(-ENOENT);
NeilBrown1ebede82010-08-12 17:04:07 +1000659 case -ETIMEDOUT:
660 return ERR_PTR(-ESHUTDOWN);
NeilBrown3fc605a2007-02-14 00:33:13 -0800661 case 0:
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400662 gi = get_group_info(ug->gi);
Stanislav Kinsbursky73393232012-01-19 21:42:29 +0400663 cache_put(&ug->h, sn->unix_gid_cache);
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400664 return gi;
NeilBrown3fc605a2007-02-14 00:33:13 -0800665 default:
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400666 return ERR_PTR(-EAGAIN);
NeilBrown3fc605a2007-02-14 00:33:13 -0800667 }
668}
669
J. Bruce Fields3ab4d8b2007-07-17 04:04:46 -0700670int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671svcauth_unix_set_client(struct svc_rqst *rqstp)
672{
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100673 struct sockaddr_in *sin;
674 struct sockaddr_in6 *sin6, sin6_storage;
NeilBrown1a9917c2006-03-27 01:15:02 -0800675 struct ip_map *ipm;
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400676 struct group_info *gi;
677 struct svc_cred *cred = &rqstp->rq_cred;
Pavel Emelyanov3be44792010-09-27 13:59:13 +0400678 struct svc_xprt *xprt = rqstp->rq_xprt;
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400679 struct net *net = xprt->xpt_net;
680 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100682 switch (rqstp->rq_addr.ss_family) {
683 case AF_INET:
684 sin = svc_addr_in(rqstp);
685 sin6 = &sin6_storage;
Brian Haleyb301e822009-10-07 13:58:25 -0700686 ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &sin6->sin6_addr);
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100687 break;
688 case AF_INET6:
689 sin6 = svc_addr_in6(rqstp);
690 break;
691 default:
692 BUG();
693 }
694
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 rqstp->rq_client = NULL;
696 if (rqstp->rq_proc == 0)
697 return SVC_OK;
698
Pavel Emelyanov3be44792010-09-27 13:59:13 +0400699 ipm = ip_map_cached_get(xprt);
Greg Banks7b2b1fe2006-10-04 02:15:50 -0700700 if (ipm == NULL)
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400701 ipm = __ip_map_lookup(sn->ip_map_cache, rqstp->rq_server->sv_program->pg_class,
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100702 &sin6->sin6_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703
704 if (ipm == NULL)
705 return SVC_DENIED;
706
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400707 switch (cache_check(sn->ip_map_cache, &ipm->h, &rqstp->rq_chandle)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 default:
709 BUG();
J.Bruce Fieldse0bb89e2006-12-13 00:35:25 -0800710 case -ETIMEDOUT:
NeilBrown1ebede82010-08-12 17:04:07 +1000711 return SVC_CLOSE;
712 case -EAGAIN:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 return SVC_DROP;
714 case -ENOENT:
715 return SVC_DENIED;
716 case 0:
717 rqstp->rq_client = &ipm->m_client->h;
NeilBrownefc36aa2006-03-27 01:14:59 -0800718 kref_get(&rqstp->rq_client->ref);
Pavel Emelyanov3be44792010-09-27 13:59:13 +0400719 ip_map_cached_put(xprt, ipm);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 break;
721 }
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400722
723 gi = unix_gid_find(cred->cr_uid, rqstp);
724 switch (PTR_ERR(gi)) {
725 case -EAGAIN:
726 return SVC_DROP;
NeilBrown1ebede82010-08-12 17:04:07 +1000727 case -ESHUTDOWN:
728 return SVC_CLOSE;
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400729 case -ENOENT:
730 break;
731 default:
732 put_group_info(cred->cr_group_info);
733 cred->cr_group_info = gi;
734 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 return SVC_OK;
736}
737
Trond Myklebust24c37672008-12-23 16:30:12 -0500738EXPORT_SYMBOL_GPL(svcauth_unix_set_client);
J. Bruce Fields3ab4d8b2007-07-17 04:04:46 -0700739
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740static int
Alexey Dobriyand8ed0292006-09-26 22:29:38 -0700741svcauth_null_accept(struct svc_rqst *rqstp, __be32 *authp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742{
743 struct kvec *argv = &rqstp->rq_arg.head[0];
744 struct kvec *resv = &rqstp->rq_res.head[0];
745 struct svc_cred *cred = &rqstp->rq_cred;
746
747 cred->cr_group_info = NULL;
748 rqstp->rq_client = NULL;
749
750 if (argv->iov_len < 3*4)
751 return SVC_GARBAGE;
752
YOSHIFUJI Hideakicca51722007-02-09 15:38:13 -0800753 if (svc_getu32(argv) != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 dprintk("svc: bad null cred\n");
755 *authp = rpc_autherr_badcred;
756 return SVC_DENIED;
757 }
Alexey Dobriyan76994312006-09-26 22:28:46 -0700758 if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 dprintk("svc: bad null verf\n");
760 *authp = rpc_autherr_badverf;
761 return SVC_DENIED;
762 }
763
764 /* Signal that mapping to nobody uid/gid is required */
765 cred->cr_uid = (uid_t) -1;
766 cred->cr_gid = (gid_t) -1;
767 cred->cr_group_info = groups_alloc(0);
768 if (cred->cr_group_info == NULL)
NeilBrown1ebede82010-08-12 17:04:07 +1000769 return SVC_CLOSE; /* kmalloc failure - client must retry */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770
771 /* Put NULL verifier */
Alexey Dobriyan76994312006-09-26 22:28:46 -0700772 svc_putnl(resv, RPC_AUTH_NULL);
773 svc_putnl(resv, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774
Andy Adamsonc4170582007-07-17 04:04:42 -0700775 rqstp->rq_flavor = RPC_AUTH_NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 return SVC_OK;
777}
778
779static int
780svcauth_null_release(struct svc_rqst *rqstp)
781{
782 if (rqstp->rq_client)
783 auth_domain_put(rqstp->rq_client);
784 rqstp->rq_client = NULL;
785 if (rqstp->rq_cred.cr_group_info)
786 put_group_info(rqstp->rq_cred.cr_group_info);
787 rqstp->rq_cred.cr_group_info = NULL;
788
789 return 0; /* don't drop */
790}
791
792
793struct auth_ops svcauth_null = {
794 .name = "null",
795 .owner = THIS_MODULE,
796 .flavour = RPC_AUTH_NULL,
797 .accept = svcauth_null_accept,
798 .release = svcauth_null_release,
799 .set_client = svcauth_unix_set_client,
800};
801
802
803static int
Alexey Dobriyand8ed0292006-09-26 22:29:38 -0700804svcauth_unix_accept(struct svc_rqst *rqstp, __be32 *authp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805{
806 struct kvec *argv = &rqstp->rq_arg.head[0];
807 struct kvec *resv = &rqstp->rq_res.head[0];
808 struct svc_cred *cred = &rqstp->rq_cred;
809 u32 slen, i;
810 int len = argv->iov_len;
811
812 cred->cr_group_info = NULL;
813 rqstp->rq_client = NULL;
814
815 if ((len -= 3*4) < 0)
816 return SVC_GARBAGE;
817
818 svc_getu32(argv); /* length */
819 svc_getu32(argv); /* time stamp */
Alexey Dobriyan76994312006-09-26 22:28:46 -0700820 slen = XDR_QUADLEN(svc_getnl(argv)); /* machname length */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 if (slen > 64 || (len -= (slen + 3)*4) < 0)
822 goto badcred;
Alexey Dobriyand8ed0292006-09-26 22:29:38 -0700823 argv->iov_base = (void*)((__be32*)argv->iov_base + slen); /* skip machname */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 argv->iov_len -= slen*4;
825
Alexey Dobriyan76994312006-09-26 22:28:46 -0700826 cred->cr_uid = svc_getnl(argv); /* uid */
827 cred->cr_gid = svc_getnl(argv); /* gid */
828 slen = svc_getnl(argv); /* gids length */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 if (slen > 16 || (len -= (slen + 2)*4) < 0)
830 goto badcred;
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400831 cred->cr_group_info = groups_alloc(slen);
832 if (cred->cr_group_info == NULL)
NeilBrown1ebede82010-08-12 17:04:07 +1000833 return SVC_CLOSE;
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400834 for (i = 0; i < slen; i++)
835 GROUP_AT(cred->cr_group_info, i) = svc_getnl(argv);
Alexey Dobriyan76994312006-09-26 22:28:46 -0700836 if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837 *authp = rpc_autherr_badverf;
838 return SVC_DENIED;
839 }
840
841 /* Put NULL verifier */
Alexey Dobriyan76994312006-09-26 22:28:46 -0700842 svc_putnl(resv, RPC_AUTH_NULL);
843 svc_putnl(resv, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844
Andy Adamsonc4170582007-07-17 04:04:42 -0700845 rqstp->rq_flavor = RPC_AUTH_UNIX;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 return SVC_OK;
847
848badcred:
849 *authp = rpc_autherr_badcred;
850 return SVC_DENIED;
851}
852
853static int
854svcauth_unix_release(struct svc_rqst *rqstp)
855{
856 /* Verifier (such as it is) is already in place.
857 */
858 if (rqstp->rq_client)
859 auth_domain_put(rqstp->rq_client);
860 rqstp->rq_client = NULL;
861 if (rqstp->rq_cred.cr_group_info)
862 put_group_info(rqstp->rq_cred.cr_group_info);
863 rqstp->rq_cred.cr_group_info = NULL;
864
865 return 0;
866}
867
868
869struct auth_ops svcauth_unix = {
870 .name = "unix",
871 .owner = THIS_MODULE,
872 .flavour = RPC_AUTH_UNIX,
873 .accept = svcauth_unix_accept,
874 .release = svcauth_unix_release,
875 .domain_release = svcauth_unix_domain_release,
876 .set_client = svcauth_unix_set_client,
877};
878
Stanislav Kinsburskyd05cc10402012-01-19 21:42:45 +0400879static struct cache_detail ip_map_cache_template = {
880 .owner = THIS_MODULE,
881 .hash_size = IP_HASHMAX,
882 .name = "auth.unix.ip",
883 .cache_put = ip_map_put,
884 .cache_upcall = ip_map_upcall,
885 .cache_parse = ip_map_parse,
886 .cache_show = ip_map_show,
887 .match = ip_map_match,
888 .init = ip_map_init,
889 .update = update,
890 .alloc = ip_map_alloc,
891};
892
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400893int ip_map_cache_create(struct net *net)
894{
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400895 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
Stanislav Kinsburskyd05cc10402012-01-19 21:42:45 +0400896 struct cache_detail *cd;
897 int err;
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400898
Stanislav Kinsburskyd05cc10402012-01-19 21:42:45 +0400899 cd = cache_create_net(&ip_map_cache_template, net);
900 if (IS_ERR(cd))
901 return PTR_ERR(cd);
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400902 err = cache_register_net(cd, net);
Stanislav Kinsburskyd05cc10402012-01-19 21:42:45 +0400903 if (err) {
904 cache_destroy_net(cd, net);
905 return err;
906 }
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400907 sn->ip_map_cache = cd;
908 return 0;
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400909}
910
911void ip_map_cache_destroy(struct net *net)
912{
Stanislav Kinsburskyd05cc10402012-01-19 21:42:45 +0400913 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
914 struct cache_detail *cd = sn->ip_map_cache;
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400915
Stanislav Kinsburskyd05cc10402012-01-19 21:42:45 +0400916 sn->ip_map_cache = NULL;
917 cache_purge(cd);
918 cache_unregister_net(cd, net);
919 cache_destroy_net(cd, net);
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400920}