blob: f81eaa8e08888a1a16041548521a5908bf8a9a50 [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>
Jeff Layton59766872013-02-04 12:50:00 -05009#include <linux/sunrpc/addr.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <linux/err.h>
11#include <linux/seq_file.h>
12#include <linux/hash.h>
Paulo Marques543537b2005-06-23 00:09:02 -070013#include <linux/string.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090014#include <linux/slab.h>
Greg Banks7b2b1fe2006-10-04 02:15:50 -070015#include <net/sock.h>
Aurélien Charbonf15364b2008-01-18 15:50:56 +010016#include <net/ipv6.h>
17#include <linux/kernel.h>
Eric W. Biedermanae2975b2011-11-14 15:56:38 -080018#include <linux/user_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#define RPCDBG_FACILITY RPCDBG_AUTH
20
21
Pavel Emelyanov90d51b02010-09-27 14:02:29 +040022#include "netns.h"
23
Linus Torvalds1da177e2005-04-16 15:20:36 -070024/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070032struct unix_domain {
33 struct auth_domain h;
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 /* other stuff later */
35};
36
H Hartley Sweeten13e0e952011-06-20 18:19:12 -070037extern struct auth_ops svcauth_null;
NeilBrownefc36aa2006-03-27 01:14:59 -080038extern struct auth_ops svcauth_unix;
39
J. Bruce Fields8b3e07a2011-03-07 22:50:47 -050040static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070048struct auth_domain *unix_domain_find(char *name)
49{
NeilBrownefc36aa2006-03-27 01:14:59 -080050 struct auth_domain *rv;
51 struct unix_domain *new = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
NeilBrownefc36aa2006-03-27 01:14:59 -080053 rv = auth_domain_lookup(name, NULL);
54 while(1) {
NeilBrownad1b5222006-03-27 01:15:11 -080055 if (rv) {
56 if (new && rv != &new->h)
J. Bruce Fields352b5d12011-03-09 22:40:30 -050057 svcauth_unix_domain_release(&new->h);
NeilBrownad1b5222006-03-27 01:15:11 -080058
59 if (rv->flavour != &svcauth_unix) {
60 auth_domain_put(rv);
61 return NULL;
62 }
NeilBrownefc36aa2006-03-27 01:14:59 -080063 return rv;
64 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
NeilBrownefc36aa2006-03-27 01:14:59 -080066 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);
NeilBrowndd08d6e2006-12-13 00:35:44 -080071 if (new->h.name == NULL) {
72 kfree(new);
73 return NULL;
74 }
NeilBrownefc36aa2006-03-27 01:14:59 -080075 new->h.flavour = &svcauth_unix;
NeilBrownefc36aa2006-03-27 01:14:59 -080076 rv = auth_domain_lookup(name, &new->h);
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070078}
Trond Myklebust24c37672008-12-23 16:30:12 -050079EXPORT_SYMBOL_GPL(unix_domain_find);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080
Linus Torvalds1da177e2005-04-16 15:20:36 -070081
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)
Linus Torvalds1da177e2005-04-16 15:20:36 -070088
89struct ip_map {
90 struct cache_head h;
91 char m_class[8]; /* e.g. "nfsd" */
Aurélien Charbonf15364b2008-01-18 15:50:56 +010092 struct in6_addr m_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 struct unix_domain *m_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -070094};
Linus Torvalds1da177e2005-04-16 15:20:36 -070095
NeilBrownbaab9352006-03-27 01:15:09 -080096static void ip_map_put(struct kref *kref)
Linus Torvalds1da177e2005-04-16 15:20:36 -070097{
NeilBrownbaab9352006-03-27 01:15:09 -080098 struct cache_head *item = container_of(kref, struct cache_head, ref);
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 struct ip_map *im = container_of(item, struct ip_map,h);
NeilBrownbaab9352006-03-27 01:15:09 -0800100
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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105}
106
Eric Dumazetddbe5032012-07-18 08:11:12 +0000107static inline int hash_ip6(const struct in6_addr *ip)
NeilBrown1f1e0302006-01-06 00:09:49 -0800108{
Eric Dumazetddbe5032012-07-18 08:11:12 +0000109 return hash_32(ipv6_addr_hash(ip), IP_HASHBITS);
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100110}
NeilBrown1a9917c2006-03-27 01:15:02 -0800111static int ip_map_match(struct cache_head *corig, struct cache_head *cnew)
112{
113 struct ip_map *orig = container_of(corig, struct ip_map, h);
114 struct ip_map *new = container_of(cnew, struct ip_map, h);
Joe Perchesf64f9e72009-11-29 16:55:45 -0800115 return strcmp(orig->m_class, new->m_class) == 0 &&
116 ipv6_addr_equal(&orig->m_addr, &new->m_addr);
NeilBrown1a9917c2006-03-27 01:15:02 -0800117}
118static void ip_map_init(struct cache_head *cnew, struct cache_head *citem)
119{
120 struct ip_map *new = container_of(cnew, struct ip_map, h);
121 struct ip_map *item = container_of(citem, struct ip_map, h);
NeilBrown1f1e0302006-01-06 00:09:49 -0800122
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 strcpy(new->m_class, item->m_class);
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000124 new->m_addr = item->m_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125}
NeilBrown1a9917c2006-03-27 01:15:02 -0800126static void update(struct cache_head *cnew, struct cache_head *citem)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127{
NeilBrown1a9917c2006-03-27 01:15:02 -0800128 struct ip_map *new = container_of(cnew, struct ip_map, h);
129 struct ip_map *item = container_of(citem, struct ip_map, h);
130
NeilBrownefc36aa2006-03-27 01:14:59 -0800131 kref_get(&item->m_client->h.ref);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 new->m_client = item->m_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133}
NeilBrown1a9917c2006-03-27 01:15:02 -0800134static 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}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142
143static void ip_map_request(struct cache_detail *cd,
144 struct cache_head *h,
145 char **bpp, int *blen)
146{
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100147 char text_addr[40];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 struct ip_map *im = container_of(h, struct ip_map, h);
YOSHIFUJI Hideakicca51722007-02-09 15:38:13 -0800149
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100150 if (ipv6_addr_v4mapped(&(im->m_addr))) {
Harvey Harrison21454aa2008-10-31 00:54:56 -0700151 snprintf(text_addr, 20, "%pI4", &im->m_addr.s6_addr32[3]);
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100152 } else {
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700153 snprintf(text_addr, 40, "%pI6", &im->m_addr);
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100154 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 qword_add(bpp, blen, im->m_class);
156 qword_add(bpp, blen, text_addr);
157 (*bpp)[-1] = '\n';
158}
159
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400160static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, struct in6_addr *addr);
161static 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 -0700162
163static 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;
NeilBrown1a9917c2006-03-27 01:15:02 -0800171 char class[8];
Chuck Lever07396052010-01-26 14:03:47 -0500172 union {
173 struct sockaddr sa;
174 struct sockaddr_in s4;
175 struct sockaddr_in6 s6;
176 } address;
177 struct sockaddr_in6 sin6;
NeilBrown1a9917c2006-03-27 01:15:02 -0800178 int err;
179
180 struct ip_map *ipmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 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 */
NeilBrown1a9917c2006-03-27 01:15:02 -0800189 len = qword_get(&mesg, class, sizeof(class));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 if (len <= 0) return -EINVAL;
191
192 /* ip address */
193 len = qword_get(&mesg, buf, mlen);
194 if (len <= 0) return -EINVAL;
195
Stanislav Kinsburskyd05cc10402012-01-19 21:42:45 +0400196 if (rpc_pton(cd->net, buf, len, &address.sa, sizeof(address)) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 return -EINVAL;
Chuck Lever07396052010-01-26 14:03:47 -0500198 switch (address.sa.sa_family) {
199 case AF_INET:
200 /* Form a mapped IPv4 address in sin6 */
Chuck Lever07396052010-01-26 14:03:47 -0500201 sin6.sin6_family = AF_INET6;
Pavel Emelyanov70dc78d2010-10-05 20:48:02 +0400202 ipv6_addr_set_v4mapped(address.s4.sin_addr.s_addr,
203 &sin6.sin6_addr);
Chuck Lever07396052010-01-26 14:03:47 -0500204 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000205#if IS_ENABLED(CONFIG_IPV6)
Chuck Lever07396052010-01-26 14:03:47 -0500206 case AF_INET6:
207 memcpy(&sin6, &address.s6, sizeof(sin6));
208 break;
209#endif
210 default:
211 return -EINVAL;
212 }
YOSHIFUJI Hideakicca51722007-02-09 15:38:13 -0800213
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 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
Chuck Lever07396052010-01-26 14:03:47 -0500229 /* IPv6 scope IDs are ignored for now */
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400230 ipmp = __ip_map_lookup(cd, class, &sin6.sin6_addr);
NeilBrown1a9917c2006-03-27 01:15:02 -0800231 if (ipmp) {
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400232 err = __ip_map_update(cd, ipmp,
NeilBrown1a9917c2006-03-27 01:15:02 -0800233 container_of(dom, struct unix_domain, h),
234 expiry);
235 } else
236 err = -ENOMEM;
237
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 if (dom)
239 auth_domain_put(dom);
NeilBrown1a9917c2006-03-27 01:15:02 -0800240
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 cache_flush();
NeilBrown1a9917c2006-03-27 01:15:02 -0800242 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243}
244
245static int ip_map_show(struct seq_file *m,
246 struct cache_detail *cd,
247 struct cache_head *h)
248{
249 struct ip_map *im;
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100250 struct in6_addr addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 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 */
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000259 addr = im->m_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
YOSHIFUJI Hideakicca51722007-02-09 15:38:13 -0800261 if (test_bit(CACHE_VALID, &h->flags) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 !test_bit(CACHE_NEGATIVE, &h->flags))
263 dom = im->m_client->h.name;
264
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100265 if (ipv6_addr_v4mapped(&addr)) {
Harvey Harrison21454aa2008-10-31 00:54:56 -0700266 seq_printf(m, "%s %pI4 %s\n",
267 im->m_class, &addr.s6_addr32[3], dom);
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100268 } else {
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700269 seq_printf(m, "%s %pI6 %s\n", im->m_class, &addr, dom);
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100270 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 return 0;
272}
YOSHIFUJI Hideakicca51722007-02-09 15:38:13 -0800273
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400275static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class,
276 struct in6_addr *addr)
NeilBrown1a9917c2006-03-27 01:15:02 -0800277{
278 struct ip_map ip;
279 struct cache_head *ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280
NeilBrown1a9917c2006-03-27 01:15:02 -0800281 strcpy(ip.m_class, class);
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000282 ip.m_addr = *addr;
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400283 ch = sunrpc_cache_lookup(cd, &ip.h,
NeilBrown1a9917c2006-03-27 01:15:02 -0800284 hash_str(class, IP_HASHBITS) ^
Eric Dumazetddbe5032012-07-18 08:11:12 +0000285 hash_ip6(addr));
NeilBrown1a9917c2006-03-27 01:15:02 -0800286
287 if (ch)
288 return container_of(ch, struct ip_map, h);
289 else
290 return NULL;
291}
292
Pavel Emelyanov352114f2010-09-27 13:59:48 +0400293static inline struct ip_map *ip_map_lookup(struct net *net, char *class,
294 struct in6_addr *addr)
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400295{
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400296 struct sunrpc_net *sn;
297
298 sn = net_generic(net, sunrpc_net_id);
299 return __ip_map_lookup(sn->ip_map_cache, class, addr);
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400300}
301
302static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm,
303 struct unix_domain *udom, time_t expiry)
NeilBrown1a9917c2006-03-27 01:15:02 -0800304{
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);
NeilBrown1a9917c2006-03-27 01:15:02 -0800312 ip.h.expiry_time = expiry;
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400313 ch = sunrpc_cache_update(cd, &ip.h, &ipm->h,
NeilBrown1a9917c2006-03-27 01:15:02 -0800314 hash_str(ipm->m_class, IP_HASHBITS) ^
Eric Dumazetddbe5032012-07-18 08:11:12 +0000315 hash_ip6(&ipm->m_addr));
NeilBrown1a9917c2006-03-27 01:15:02 -0800316 if (!ch)
317 return -ENOMEM;
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400318 cache_put(ch, cd);
NeilBrown1a9917c2006-03-27 01:15:02 -0800319 return 0;
320}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321
Pavel Emelyanov352114f2010-09-27 13:59:48 +0400322static inline int ip_map_update(struct net *net, struct ip_map *ipm,
323 struct unix_domain *udom, time_t expiry)
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400324{
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400325 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);
Pavel Emelyanovbf18ab32010-09-27 13:57:36 +0400329}
330
Stanislav Kinsburskye5f06f72012-04-11 15:13:28 +0400331void svcauth_unix_purge(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332{
Stanislav Kinsburskye5f06f72012-04-11 15:13:28 +0400333 struct sunrpc_net *sn;
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400334
Stanislav Kinsburskye5f06f72012-04-11 15:13:28 +0400335 sn = net_generic(net, sunrpc_net_id);
336 cache_purge(sn->ip_map_cache);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337}
Trond Myklebust24c37672008-12-23 16:30:12 -0500338EXPORT_SYMBOL_GPL(svcauth_unix_purge);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
Greg Banks7b2b1fe2006-10-04 02:15:50 -0700340static inline struct ip_map *
Pavel Emelyanov3be44792010-09-27 13:59:13 +0400341ip_map_cached_get(struct svc_xprt *xprt)
Greg Banks7b2b1fe2006-10-04 02:15:50 -0700342{
Tom Tuckerdef13d72007-12-30 21:08:08 -0600343 struct ip_map *ipm = NULL;
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400344 struct sunrpc_net *sn;
Tom Tuckerdef13d72007-12-30 21:08:08 -0600345
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) {
NeilBrown7715cde2013-06-13 12:53:42 +1000350 sn = net_generic(xprt->xpt_net, sunrpc_net_id);
351 if (cache_is_expired(sn->ip_map_cache, &ipm->h)) {
Tom Tuckerdef13d72007-12-30 21:08:08 -0600352 /*
353 * The entry has been invalidated since it was
354 * remembered, e.g. by a second mount from the
355 * same IP address.
356 */
357 xprt->xpt_auth_cache = NULL;
358 spin_unlock(&xprt->xpt_lock);
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400359 cache_put(&ipm->h, sn->ip_map_cache);
Tom Tuckerdef13d72007-12-30 21:08:08 -0600360 return NULL;
361 }
362 cache_get(&ipm->h);
Greg Banks7b2b1fe2006-10-04 02:15:50 -0700363 }
Tom Tuckerdef13d72007-12-30 21:08:08 -0600364 spin_unlock(&xprt->xpt_lock);
Greg Banks7b2b1fe2006-10-04 02:15:50 -0700365 }
366 return ipm;
367}
368
369static inline void
Pavel Emelyanov3be44792010-09-27 13:59:13 +0400370ip_map_cached_put(struct svc_xprt *xprt, struct ip_map *ipm)
Greg Banks7b2b1fe2006-10-04 02:15:50 -0700371{
Tom Tuckerdef13d72007-12-30 21:08:08 -0600372 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);
NeilBrown30f3dee2007-04-16 22:53:25 -0700380 }
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400381 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 }
Greg Banks7b2b1fe2006-10-04 02:15:50 -0700387}
388
389void
Pavel Emelyanove3bfca02010-09-27 13:58:42 +0400390svcauth_unix_info_release(struct svc_xprt *xpt)
Greg Banks7b2b1fe2006-10-04 02:15:50 -0700391{
Pavel Emelyanove3bfca02010-09-27 13:58:42 +0400392 struct ip_map *ipm;
393
394 ipm = xpt->xpt_auth_cache;
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400395 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 }
Greg Banks7b2b1fe2006-10-04 02:15:50 -0700401}
402
NeilBrown3fc605a2007-02-14 00:33:13 -0800403/****************************************************************************
404 * auth.unix.gid cache
405 * simple cache to map a UID to a list of GIDs
Kinglong Mee57864612017-02-07 21:48:11 +0800406 * because AUTH_UNIX aka AUTH_SYS has a max of UNX_NGROUPS
NeilBrown3fc605a2007-02-14 00:33:13 -0800407 */
408#define GID_HASHBITS 8
409#define GID_HASHMAX (1<<GID_HASHBITS)
NeilBrown3fc605a2007-02-14 00:33:13 -0800410
411struct unix_gid {
412 struct cache_head h;
Eric W. Biederman7eaf0402013-02-01 16:31:17 -0800413 kuid_t uid;
NeilBrown3fc605a2007-02-14 00:33:13 -0800414 struct group_info *gi;
415};
NeilBrown3fc605a2007-02-14 00:33:13 -0800416
Eric W. Biederman9e469e32013-02-02 01:57:30 -0800417static int unix_gid_hash(kuid_t uid)
418{
419 return hash_long(from_kuid(&init_user_ns, uid), GID_HASHBITS);
420}
421
NeilBrown3fc605a2007-02-14 00:33:13 -0800422static 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
432static 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);
Eric W. Biederman0b4d51b2013-02-01 16:39:32 -0800436 return uid_eq(orig->uid, new->uid);
NeilBrown3fc605a2007-02-14 00:33:13 -0800437}
438static 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}
444static 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}
452static 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
461static 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
Eric W. Biederman25da9262013-02-02 02:49:44 -0800468 snprintf(tuid, 20, "%u", from_kuid(&init_user_ns, ug->uid));
NeilBrown3fc605a2007-02-14 00:33:13 -0800469 qword_add(bpp, blen, tuid);
470 (*bpp)[-1] = '\n';
471}
472
Eric W. Biederman7eaf0402013-02-01 16:31:17 -0800473static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, kuid_t uid);
NeilBrown3fc605a2007-02-14 00:33:13 -0800474
475static int unix_gid_parse(struct cache_detail *cd,
476 char *mesg, int mlen)
477{
478 /* uid expiry Ngid gid0 gid1 ... gidN-1 */
Eric W. Biederman25da9262013-02-02 02:49:44 -0800479 int id;
480 kuid_t uid;
NeilBrown3fc605a2007-02-14 00:33:13 -0800481 int gids;
482 int rv;
483 int i;
484 int err;
485 time_t expiry;
486 struct unix_gid ug, *ugp;
487
Dan Carpenter34769642012-01-20 10:48:18 +0300488 if (mesg[mlen - 1] != '\n')
NeilBrown3fc605a2007-02-14 00:33:13 -0800489 return -EINVAL;
490 mesg[mlen-1] = 0;
491
Eric W. Biederman25da9262013-02-02 02:49:44 -0800492 rv = get_int(&mesg, &id);
NeilBrown3fc605a2007-02-14 00:33:13 -0800493 if (rv)
494 return -EINVAL;
Eric W. Biederman25da9262013-02-02 02:49:44 -0800495 uid = make_kuid(&init_user_ns, id);
NeilBrown3fc605a2007-02-14 00:33:13 -0800496 ug.uid = uid;
497
498 expiry = get_expiry(&mesg);
499 if (expiry == 0)
500 return -EINVAL;
501
502 rv = get_int(&mesg, &gids);
503 if (rv || gids < 0 || gids > 8192)
504 return -EINVAL;
505
506 ug.gi = groups_alloc(gids);
507 if (!ug.gi)
508 return -ENOMEM;
509
510 for (i = 0 ; i < gids ; i++) {
511 int gid;
Eric W. Biedermanae2975b2011-11-14 15:56:38 -0800512 kgid_t kgid;
NeilBrown3fc605a2007-02-14 00:33:13 -0800513 rv = get_int(&mesg, &gid);
514 err = -EINVAL;
515 if (rv)
516 goto out;
Eric W. Biedermanae2975b2011-11-14 15:56:38 -0800517 kgid = make_kgid(&init_user_ns, gid);
518 if (!gid_valid(kgid))
519 goto out;
Alexey Dobriyan81243ea2016-10-07 17:03:12 -0700520 ug.gi->gid[i] = kgid;
NeilBrown3fc605a2007-02-14 00:33:13 -0800521 }
522
Stanislav Kinsbursky73393232012-01-19 21:42:29 +0400523 ugp = unix_gid_lookup(cd, uid);
NeilBrown3fc605a2007-02-14 00:33:13 -0800524 if (ugp) {
525 struct cache_head *ch;
526 ug.h.flags = 0;
527 ug.h.expiry_time = expiry;
Stanislav Kinsbursky73393232012-01-19 21:42:29 +0400528 ch = sunrpc_cache_update(cd,
NeilBrown3fc605a2007-02-14 00:33:13 -0800529 &ug.h, &ugp->h,
Eric W. Biederman9e469e32013-02-02 01:57:30 -0800530 unix_gid_hash(uid));
NeilBrown3fc605a2007-02-14 00:33:13 -0800531 if (!ch)
532 err = -ENOMEM;
533 else {
534 err = 0;
Stanislav Kinsbursky73393232012-01-19 21:42:29 +0400535 cache_put(ch, cd);
NeilBrown3fc605a2007-02-14 00:33:13 -0800536 }
537 } else
538 err = -ENOMEM;
539 out:
540 if (ug.gi)
541 put_group_info(ug.gi);
542 return err;
543}
544
545static int unix_gid_show(struct seq_file *m,
546 struct cache_detail *cd,
547 struct cache_head *h)
548{
Eric W. Biederman25da9262013-02-02 02:49:44 -0800549 struct user_namespace *user_ns = &init_user_ns;
NeilBrown3fc605a2007-02-14 00:33:13 -0800550 struct unix_gid *ug;
551 int i;
552 int glen;
553
554 if (h == NULL) {
555 seq_puts(m, "#uid cnt: gids...\n");
556 return 0;
557 }
558 ug = container_of(h, struct unix_gid, h);
559 if (test_bit(CACHE_VALID, &h->flags) &&
560 !test_bit(CACHE_NEGATIVE, &h->flags))
561 glen = ug->gi->ngroups;
562 else
563 glen = 0;
564
Eric W. Biederman25da9262013-02-02 02:49:44 -0800565 seq_printf(m, "%u %d:", from_kuid_munged(user_ns, ug->uid), glen);
NeilBrown3fc605a2007-02-14 00:33:13 -0800566 for (i = 0; i < glen; i++)
Alexey Dobriyan81243ea2016-10-07 17:03:12 -0700567 seq_printf(m, " %d", from_kgid_munged(user_ns, ug->gi->gid[i]));
NeilBrown3fc605a2007-02-14 00:33:13 -0800568 seq_printf(m, "\n");
569 return 0;
570}
571
Stanislav Kinsbursky73393232012-01-19 21:42:29 +0400572static struct cache_detail unix_gid_cache_template = {
NeilBrown3fc605a2007-02-14 00:33:13 -0800573 .owner = THIS_MODULE,
574 .hash_size = GID_HASHMAX,
NeilBrown3fc605a2007-02-14 00:33:13 -0800575 .name = "auth.unix.gid",
576 .cache_put = unix_gid_put,
Stanislav Kinsbursky73fb8472013-02-04 14:02:45 +0300577 .cache_request = unix_gid_request,
NeilBrown3fc605a2007-02-14 00:33:13 -0800578 .cache_parse = unix_gid_parse,
579 .cache_show = unix_gid_show,
580 .match = unix_gid_match,
581 .init = unix_gid_init,
582 .update = unix_gid_update,
583 .alloc = unix_gid_alloc,
584};
585
Stanislav Kinsbursky73393232012-01-19 21:42:29 +0400586int unix_gid_cache_create(struct net *net)
587{
588 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
589 struct cache_detail *cd;
590 int err;
591
592 cd = cache_create_net(&unix_gid_cache_template, net);
593 if (IS_ERR(cd))
594 return PTR_ERR(cd);
595 err = cache_register_net(cd, net);
596 if (err) {
597 cache_destroy_net(cd, net);
598 return err;
599 }
600 sn->unix_gid_cache = cd;
601 return 0;
602}
603
604void unix_gid_cache_destroy(struct net *net)
605{
606 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
607 struct cache_detail *cd = sn->unix_gid_cache;
608
609 sn->unix_gid_cache = NULL;
610 cache_purge(cd);
611 cache_unregister_net(cd, net);
612 cache_destroy_net(cd, net);
613}
614
Eric W. Biederman7eaf0402013-02-01 16:31:17 -0800615static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, kuid_t uid)
NeilBrown3fc605a2007-02-14 00:33:13 -0800616{
617 struct unix_gid ug;
618 struct cache_head *ch;
619
620 ug.uid = uid;
Eric W. Biederman9e469e32013-02-02 01:57:30 -0800621 ch = sunrpc_cache_lookup(cd, &ug.h, unix_gid_hash(uid));
NeilBrown3fc605a2007-02-14 00:33:13 -0800622 if (ch)
623 return container_of(ch, struct unix_gid, h);
624 else
625 return NULL;
626}
627
Eric W. Biederman7eaf0402013-02-01 16:31:17 -0800628static struct group_info *unix_gid_find(kuid_t uid, struct svc_rqst *rqstp)
NeilBrown3fc605a2007-02-14 00:33:13 -0800629{
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400630 struct unix_gid *ug;
631 struct group_info *gi;
632 int ret;
Stanislav Kinsbursky73393232012-01-19 21:42:29 +0400633 struct sunrpc_net *sn = net_generic(rqstp->rq_xprt->xpt_net,
634 sunrpc_net_id);
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400635
Stanislav Kinsbursky73393232012-01-19 21:42:29 +0400636 ug = unix_gid_lookup(sn->unix_gid_cache, uid);
NeilBrown3fc605a2007-02-14 00:33:13 -0800637 if (!ug)
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400638 return ERR_PTR(-EAGAIN);
Stanislav Kinsbursky73393232012-01-19 21:42:29 +0400639 ret = cache_check(sn->unix_gid_cache, &ug->h, &rqstp->rq_chandle);
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400640 switch (ret) {
NeilBrown3fc605a2007-02-14 00:33:13 -0800641 case -ENOENT:
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400642 return ERR_PTR(-ENOENT);
NeilBrown1ebede82010-08-12 17:04:07 +1000643 case -ETIMEDOUT:
644 return ERR_PTR(-ESHUTDOWN);
NeilBrown3fc605a2007-02-14 00:33:13 -0800645 case 0:
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400646 gi = get_group_info(ug->gi);
Stanislav Kinsbursky73393232012-01-19 21:42:29 +0400647 cache_put(&ug->h, sn->unix_gid_cache);
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400648 return gi;
NeilBrown3fc605a2007-02-14 00:33:13 -0800649 default:
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400650 return ERR_PTR(-EAGAIN);
NeilBrown3fc605a2007-02-14 00:33:13 -0800651 }
652}
653
J. Bruce Fields3ab4d8b2007-07-17 04:04:46 -0700654int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655svcauth_unix_set_client(struct svc_rqst *rqstp)
656{
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100657 struct sockaddr_in *sin;
658 struct sockaddr_in6 *sin6, sin6_storage;
NeilBrown1a9917c2006-03-27 01:15:02 -0800659 struct ip_map *ipm;
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400660 struct group_info *gi;
661 struct svc_cred *cred = &rqstp->rq_cred;
Pavel Emelyanov3be44792010-09-27 13:59:13 +0400662 struct svc_xprt *xprt = rqstp->rq_xprt;
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400663 struct net *net = xprt->xpt_net;
664 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100666 switch (rqstp->rq_addr.ss_family) {
667 case AF_INET:
668 sin = svc_addr_in(rqstp);
669 sin6 = &sin6_storage;
Brian Haleyb301e822009-10-07 13:58:25 -0700670 ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &sin6->sin6_addr);
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100671 break;
672 case AF_INET6:
673 sin6 = svc_addr_in6(rqstp);
674 break;
675 default:
676 BUG();
677 }
678
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679 rqstp->rq_client = NULL;
680 if (rqstp->rq_proc == 0)
681 return SVC_OK;
682
Pavel Emelyanov3be44792010-09-27 13:59:13 +0400683 ipm = ip_map_cached_get(xprt);
Greg Banks7b2b1fe2006-10-04 02:15:50 -0700684 if (ipm == NULL)
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400685 ipm = __ip_map_lookup(sn->ip_map_cache, rqstp->rq_server->sv_program->pg_class,
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100686 &sin6->sin6_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687
688 if (ipm == NULL)
689 return SVC_DENIED;
690
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400691 switch (cache_check(sn->ip_map_cache, &ipm->h, &rqstp->rq_chandle)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 default:
693 BUG();
J.Bruce Fieldse0bb89e2006-12-13 00:35:25 -0800694 case -ETIMEDOUT:
NeilBrown1ebede82010-08-12 17:04:07 +1000695 return SVC_CLOSE;
696 case -EAGAIN:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 return SVC_DROP;
698 case -ENOENT:
699 return SVC_DENIED;
700 case 0:
701 rqstp->rq_client = &ipm->m_client->h;
NeilBrownefc36aa2006-03-27 01:14:59 -0800702 kref_get(&rqstp->rq_client->ref);
Pavel Emelyanov3be44792010-09-27 13:59:13 +0400703 ip_map_cached_put(xprt, ipm);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 break;
705 }
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400706
707 gi = unix_gid_find(cred->cr_uid, rqstp);
708 switch (PTR_ERR(gi)) {
709 case -EAGAIN:
710 return SVC_DROP;
NeilBrown1ebede82010-08-12 17:04:07 +1000711 case -ESHUTDOWN:
712 return SVC_CLOSE;
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400713 case -ENOENT:
714 break;
715 default:
716 put_group_info(cred->cr_group_info);
717 cred->cr_group_info = gi;
718 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 return SVC_OK;
720}
721
Trond Myklebust24c37672008-12-23 16:30:12 -0500722EXPORT_SYMBOL_GPL(svcauth_unix_set_client);
J. Bruce Fields3ab4d8b2007-07-17 04:04:46 -0700723
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724static int
Alexey Dobriyand8ed0292006-09-26 22:29:38 -0700725svcauth_null_accept(struct svc_rqst *rqstp, __be32 *authp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726{
727 struct kvec *argv = &rqstp->rq_arg.head[0];
728 struct kvec *resv = &rqstp->rq_res.head[0];
729 struct svc_cred *cred = &rqstp->rq_cred;
730
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 if (argv->iov_len < 3*4)
732 return SVC_GARBAGE;
733
YOSHIFUJI Hideakicca51722007-02-09 15:38:13 -0800734 if (svc_getu32(argv) != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 dprintk("svc: bad null cred\n");
736 *authp = rpc_autherr_badcred;
737 return SVC_DENIED;
738 }
Alexey Dobriyan76994312006-09-26 22:28:46 -0700739 if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 dprintk("svc: bad null verf\n");
741 *authp = rpc_autherr_badverf;
742 return SVC_DENIED;
743 }
744
745 /* Signal that mapping to nobody uid/gid is required */
Eric W. Biedermanbf37f792013-02-01 15:55:38 -0800746 cred->cr_uid = INVALID_UID;
747 cred->cr_gid = INVALID_GID;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 cred->cr_group_info = groups_alloc(0);
749 if (cred->cr_group_info == NULL)
NeilBrown1ebede82010-08-12 17:04:07 +1000750 return SVC_CLOSE; /* kmalloc failure - client must retry */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751
752 /* Put NULL verifier */
Alexey Dobriyan76994312006-09-26 22:28:46 -0700753 svc_putnl(resv, RPC_AUTH_NULL);
754 svc_putnl(resv, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755
J. Bruce Fieldsd5497fc2012-05-14 22:06:49 -0400756 rqstp->rq_cred.cr_flavor = RPC_AUTH_NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 return SVC_OK;
758}
759
760static int
761svcauth_null_release(struct svc_rqst *rqstp)
762{
763 if (rqstp->rq_client)
764 auth_domain_put(rqstp->rq_client);
765 rqstp->rq_client = NULL;
766 if (rqstp->rq_cred.cr_group_info)
767 put_group_info(rqstp->rq_cred.cr_group_info);
768 rqstp->rq_cred.cr_group_info = NULL;
769
770 return 0; /* don't drop */
771}
772
773
774struct auth_ops svcauth_null = {
775 .name = "null",
776 .owner = THIS_MODULE,
777 .flavour = RPC_AUTH_NULL,
778 .accept = svcauth_null_accept,
779 .release = svcauth_null_release,
780 .set_client = svcauth_unix_set_client,
781};
782
783
784static int
Alexey Dobriyand8ed0292006-09-26 22:29:38 -0700785svcauth_unix_accept(struct svc_rqst *rqstp, __be32 *authp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786{
787 struct kvec *argv = &rqstp->rq_arg.head[0];
788 struct kvec *resv = &rqstp->rq_res.head[0];
789 struct svc_cred *cred = &rqstp->rq_cred;
790 u32 slen, i;
791 int len = argv->iov_len;
792
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 if ((len -= 3*4) < 0)
794 return SVC_GARBAGE;
795
796 svc_getu32(argv); /* length */
797 svc_getu32(argv); /* time stamp */
Alexey Dobriyan76994312006-09-26 22:28:46 -0700798 slen = XDR_QUADLEN(svc_getnl(argv)); /* machname length */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 if (slen > 64 || (len -= (slen + 3)*4) < 0)
800 goto badcred;
Alexey Dobriyand8ed0292006-09-26 22:29:38 -0700801 argv->iov_base = (void*)((__be32*)argv->iov_base + slen); /* skip machname */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 argv->iov_len -= slen*4;
J. Bruce Fieldsafe3c3f2013-05-24 17:24:34 -0400803 /*
804 * Note: we skip uid_valid()/gid_valid() checks here for
805 * backwards compatibility with clients that use -1 id's.
806 * Instead, -1 uid or gid is later mapped to the
807 * (export-specific) anonymous id by nfsd_setuser.
808 * Supplementary gid's will be left alone.
809 */
Eric W. Biedermanf025adf2013-02-02 03:03:04 -0800810 cred->cr_uid = make_kuid(&init_user_ns, svc_getnl(argv)); /* uid */
811 cred->cr_gid = make_kgid(&init_user_ns, svc_getnl(argv)); /* gid */
Alexey Dobriyan76994312006-09-26 22:28:46 -0700812 slen = svc_getnl(argv); /* gids length */
Kinglong Mee57864612017-02-07 21:48:11 +0800813 if (slen > UNX_NGROUPS || (len -= (slen + 2)*4) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 goto badcred;
J. Bruce Fieldsdc83d6e2009-10-20 18:51:34 -0400815 cred->cr_group_info = groups_alloc(slen);
816 if (cred->cr_group_info == NULL)
NeilBrown1ebede82010-08-12 17:04:07 +1000817 return SVC_CLOSE;
Eric W. Biedermanae2975b2011-11-14 15:56:38 -0800818 for (i = 0; i < slen; i++) {
819 kgid_t kgid = make_kgid(&init_user_ns, svc_getnl(argv));
Alexey Dobriyan81243ea2016-10-07 17:03:12 -0700820 cred->cr_group_info->gid[i] = kgid;
Eric W. Biedermanae2975b2011-11-14 15:56:38 -0800821 }
Alexey Dobriyan76994312006-09-26 22:28:46 -0700822 if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 *authp = rpc_autherr_badverf;
824 return SVC_DENIED;
825 }
826
827 /* Put NULL verifier */
Alexey Dobriyan76994312006-09-26 22:28:46 -0700828 svc_putnl(resv, RPC_AUTH_NULL);
829 svc_putnl(resv, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830
J. Bruce Fieldsd5497fc2012-05-14 22:06:49 -0400831 rqstp->rq_cred.cr_flavor = RPC_AUTH_UNIX;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 return SVC_OK;
833
834badcred:
835 *authp = rpc_autherr_badcred;
836 return SVC_DENIED;
837}
838
839static int
840svcauth_unix_release(struct svc_rqst *rqstp)
841{
842 /* Verifier (such as it is) is already in place.
843 */
844 if (rqstp->rq_client)
845 auth_domain_put(rqstp->rq_client);
846 rqstp->rq_client = NULL;
847 if (rqstp->rq_cred.cr_group_info)
848 put_group_info(rqstp->rq_cred.cr_group_info);
849 rqstp->rq_cred.cr_group_info = NULL;
850
851 return 0;
852}
853
854
855struct auth_ops svcauth_unix = {
856 .name = "unix",
857 .owner = THIS_MODULE,
858 .flavour = RPC_AUTH_UNIX,
859 .accept = svcauth_unix_accept,
860 .release = svcauth_unix_release,
861 .domain_release = svcauth_unix_domain_release,
862 .set_client = svcauth_unix_set_client,
863};
864
Stanislav Kinsburskyd05cc10402012-01-19 21:42:45 +0400865static struct cache_detail ip_map_cache_template = {
866 .owner = THIS_MODULE,
867 .hash_size = IP_HASHMAX,
868 .name = "auth.unix.ip",
869 .cache_put = ip_map_put,
Stanislav Kinsbursky73fb8472013-02-04 14:02:45 +0300870 .cache_request = ip_map_request,
Stanislav Kinsburskyd05cc10402012-01-19 21:42:45 +0400871 .cache_parse = ip_map_parse,
872 .cache_show = ip_map_show,
873 .match = ip_map_match,
874 .init = ip_map_init,
875 .update = update,
876 .alloc = ip_map_alloc,
877};
878
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400879int ip_map_cache_create(struct net *net)
880{
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400881 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
Stanislav Kinsburskyd05cc10402012-01-19 21:42:45 +0400882 struct cache_detail *cd;
883 int err;
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400884
Stanislav Kinsburskyd05cc10402012-01-19 21:42:45 +0400885 cd = cache_create_net(&ip_map_cache_template, net);
886 if (IS_ERR(cd))
887 return PTR_ERR(cd);
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400888 err = cache_register_net(cd, net);
Stanislav Kinsburskyd05cc10402012-01-19 21:42:45 +0400889 if (err) {
890 cache_destroy_net(cd, net);
891 return err;
892 }
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400893 sn->ip_map_cache = cd;
894 return 0;
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400895}
896
897void ip_map_cache_destroy(struct net *net)
898{
Stanislav Kinsburskyd05cc10402012-01-19 21:42:45 +0400899 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
900 struct cache_detail *cd = sn->ip_map_cache;
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400901
Stanislav Kinsburskyd05cc10402012-01-19 21:42:45 +0400902 sn->ip_map_cache = NULL;
903 cache_purge(cd);
904 cache_unregister_net(cd, net);
905 cache_destroy_net(cd, net);
Pavel Emelyanov90d51b02010-09-27 14:02:29 +0400906}