1 // SPDX-License-Identifier: GPL-2.0-only
2 #include <linux/types.h>
3 #include <linux/sched.h>
4 #include <linux/module.h>
5 #include <linux/sunrpc/types.h>
6 #include <linux/sunrpc/xdr.h>
7 #include <linux/sunrpc/svcsock.h>
8 #include <linux/sunrpc/svcauth.h>
9 #include <linux/sunrpc/gss_api.h>
10 #include <linux/sunrpc/addr.h>
11 #include <linux/err.h>
12 #include <linux/seq_file.h>
13 #include <linux/hash.h>
14 #include <linux/string.h>
15 #include <linux/slab.h>
18 #include <linux/kernel.h>
19 #include <linux/user_namespace.h>
20 #include <trace/events/sunrpc.h>
22 #define RPCDBG_FACILITY RPCDBG_AUTH
27 * AUTHUNIX and AUTHNULL credentials are both handled here.
28 * AUTHNULL is treated just like AUTHUNIX except that the uid/gid
29 * are always nobody (-2). i.e. we do the same IP address checks for
30 * AUTHNULL as for AUTHUNIX, and that is done here.
36 /* other stuff later */
39 extern struct auth_ops svcauth_null;
40 extern struct auth_ops svcauth_unix;
41 extern struct auth_ops svcauth_tls;
43 static void svcauth_unix_domain_release_rcu(struct rcu_head *head)
45 struct auth_domain *dom = container_of(head, struct auth_domain, rcu_head);
46 struct unix_domain *ud = container_of(dom, struct unix_domain, h);
52 static void svcauth_unix_domain_release(struct auth_domain *dom)
54 call_rcu(&dom->rcu_head, svcauth_unix_domain_release_rcu);
57 struct auth_domain *unix_domain_find(char *name)
59 struct auth_domain *rv;
60 struct unix_domain *new = NULL;
62 rv = auth_domain_find(name);
65 if (new && rv != &new->h)
66 svcauth_unix_domain_release(&new->h);
68 if (rv->flavour != &svcauth_unix) {
75 new = kmalloc(sizeof(*new), GFP_KERNEL);
78 kref_init(&new->h.ref);
79 new->h.name = kstrdup(name, GFP_KERNEL);
80 if (new->h.name == NULL) {
84 new->h.flavour = &svcauth_unix;
85 rv = auth_domain_lookup(name, &new->h);
88 EXPORT_SYMBOL_GPL(unix_domain_find);
91 /**************************************************
92 * cache for IP address to unix_domain
93 * as needed by AUTH_UNIX
96 #define IP_HASHMAX (1<<IP_HASHBITS)
100 char m_class[8]; /* e.g. "nfsd" */
101 struct in6_addr m_addr;
102 struct unix_domain *m_client;
103 struct rcu_head m_rcu;
106 static void ip_map_put(struct kref *kref)
108 struct cache_head *item = container_of(kref, struct cache_head, ref);
109 struct ip_map *im = container_of(item, struct ip_map,h);
111 if (test_bit(CACHE_VALID, &item->flags) &&
112 !test_bit(CACHE_NEGATIVE, &item->flags))
113 auth_domain_put(&im->m_client->h);
114 kfree_rcu(im, m_rcu);
117 static inline int hash_ip6(const struct in6_addr *ip)
119 return hash_32(ipv6_addr_hash(ip), IP_HASHBITS);
121 static int ip_map_match(struct cache_head *corig, struct cache_head *cnew)
123 struct ip_map *orig = container_of(corig, struct ip_map, h);
124 struct ip_map *new = container_of(cnew, struct ip_map, h);
125 return strcmp(orig->m_class, new->m_class) == 0 &&
126 ipv6_addr_equal(&orig->m_addr, &new->m_addr);
128 static void ip_map_init(struct cache_head *cnew, struct cache_head *citem)
130 struct ip_map *new = container_of(cnew, struct ip_map, h);
131 struct ip_map *item = container_of(citem, struct ip_map, h);
133 strcpy(new->m_class, item->m_class);
134 new->m_addr = item->m_addr;
136 static void update(struct cache_head *cnew, struct cache_head *citem)
138 struct ip_map *new = container_of(cnew, struct ip_map, h);
139 struct ip_map *item = container_of(citem, struct ip_map, h);
141 kref_get(&item->m_client->h.ref);
142 new->m_client = item->m_client;
144 static struct cache_head *ip_map_alloc(void)
146 struct ip_map *i = kmalloc(sizeof(*i), GFP_KERNEL);
153 static int ip_map_upcall(struct cache_detail *cd, struct cache_head *h)
155 return sunrpc_cache_pipe_upcall(cd, h);
158 static void ip_map_request(struct cache_detail *cd,
159 struct cache_head *h,
160 char **bpp, int *blen)
163 struct ip_map *im = container_of(h, struct ip_map, h);
165 if (ipv6_addr_v4mapped(&(im->m_addr))) {
166 snprintf(text_addr, 20, "%pI4", &im->m_addr.s6_addr32[3]);
168 snprintf(text_addr, 40, "%pI6", &im->m_addr);
170 qword_add(bpp, blen, im->m_class);
171 qword_add(bpp, blen, text_addr);
175 static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, struct in6_addr *addr);
176 static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm, struct unix_domain *udom, time64_t expiry);
178 static int ip_map_parse(struct cache_detail *cd,
179 char *mesg, int mlen)
181 /* class ipaddress [domainname] */
182 /* should be safe just to use the start of the input buffer
189 struct sockaddr_in s4;
190 struct sockaddr_in6 s6;
192 struct sockaddr_in6 sin6;
196 struct auth_domain *dom;
199 if (mesg[mlen-1] != '\n')
204 len = qword_get(&mesg, class, sizeof(class));
205 if (len <= 0) return -EINVAL;
208 len = qword_get(&mesg, buf, mlen);
209 if (len <= 0) return -EINVAL;
211 if (rpc_pton(cd->net, buf, len, &address.sa, sizeof(address)) == 0)
213 switch (address.sa.sa_family) {
215 /* Form a mapped IPv4 address in sin6 */
216 sin6.sin6_family = AF_INET6;
217 ipv6_addr_set_v4mapped(address.s4.sin_addr.s_addr,
220 #if IS_ENABLED(CONFIG_IPV6)
222 memcpy(&sin6, &address.s6, sizeof(sin6));
229 err = get_expiry(&mesg, &expiry);
233 /* domainname, or empty for NEGATIVE */
234 len = qword_get(&mesg, buf, mlen);
235 if (len < 0) return -EINVAL;
238 dom = unix_domain_find(buf);
244 /* IPv6 scope IDs are ignored for now */
245 ipmp = __ip_map_lookup(cd, class, &sin6.sin6_addr);
247 err = __ip_map_update(cd, ipmp,
248 container_of(dom, struct unix_domain, h),
254 auth_domain_put(dom);
260 static int ip_map_show(struct seq_file *m,
261 struct cache_detail *cd,
262 struct cache_head *h)
265 struct in6_addr addr;
266 char *dom = "-no-domain-";
269 seq_puts(m, "#class IP domain\n");
272 im = container_of(h, struct ip_map, h);
273 /* class addr domain */
276 if (test_bit(CACHE_VALID, &h->flags) &&
277 !test_bit(CACHE_NEGATIVE, &h->flags))
278 dom = im->m_client->h.name;
280 if (ipv6_addr_v4mapped(&addr)) {
281 seq_printf(m, "%s %pI4 %s\n",
282 im->m_class, &addr.s6_addr32[3], dom);
284 seq_printf(m, "%s %pI6 %s\n", im->m_class, &addr, dom);
290 static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class,
291 struct in6_addr *addr)
294 struct cache_head *ch;
296 strcpy(ip.m_class, class);
298 ch = sunrpc_cache_lookup_rcu(cd, &ip.h,
299 hash_str(class, IP_HASHBITS) ^
303 return container_of(ch, struct ip_map, h);
308 static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm,
309 struct unix_domain *udom, time64_t expiry)
312 struct cache_head *ch;
317 set_bit(CACHE_NEGATIVE, &ip.h.flags);
318 ip.h.expiry_time = expiry;
319 ch = sunrpc_cache_update(cd, &ip.h, &ipm->h,
320 hash_str(ipm->m_class, IP_HASHBITS) ^
321 hash_ip6(&ipm->m_addr));
328 void svcauth_unix_purge(struct net *net)
330 struct sunrpc_net *sn;
332 sn = net_generic(net, sunrpc_net_id);
333 cache_purge(sn->ip_map_cache);
335 EXPORT_SYMBOL_GPL(svcauth_unix_purge);
337 static inline struct ip_map *
338 ip_map_cached_get(struct svc_xprt *xprt)
340 struct ip_map *ipm = NULL;
341 struct sunrpc_net *sn;
343 if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) {
344 spin_lock(&xprt->xpt_lock);
345 ipm = xprt->xpt_auth_cache;
347 sn = net_generic(xprt->xpt_net, sunrpc_net_id);
348 if (cache_is_expired(sn->ip_map_cache, &ipm->h)) {
350 * The entry has been invalidated since it was
351 * remembered, e.g. by a second mount from the
354 xprt->xpt_auth_cache = NULL;
355 spin_unlock(&xprt->xpt_lock);
356 cache_put(&ipm->h, sn->ip_map_cache);
361 spin_unlock(&xprt->xpt_lock);
367 ip_map_cached_put(struct svc_xprt *xprt, struct ip_map *ipm)
369 if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) {
370 spin_lock(&xprt->xpt_lock);
371 if (xprt->xpt_auth_cache == NULL) {
372 /* newly cached, keep the reference */
373 xprt->xpt_auth_cache = ipm;
376 spin_unlock(&xprt->xpt_lock);
379 struct sunrpc_net *sn;
381 sn = net_generic(xprt->xpt_net, sunrpc_net_id);
382 cache_put(&ipm->h, sn->ip_map_cache);
387 svcauth_unix_info_release(struct svc_xprt *xpt)
391 ipm = xpt->xpt_auth_cache;
393 struct sunrpc_net *sn;
395 sn = net_generic(xpt->xpt_net, sunrpc_net_id);
396 cache_put(&ipm->h, sn->ip_map_cache);
400 /****************************************************************************
401 * auth.unix.gid cache
402 * simple cache to map a UID to a list of GIDs
403 * because AUTH_UNIX aka AUTH_SYS has a max of UNX_NGROUPS
405 #define GID_HASHBITS 8
406 #define GID_HASHMAX (1<<GID_HASHBITS)
411 struct group_info *gi;
415 static int unix_gid_hash(kuid_t uid)
417 return hash_long(from_kuid(&init_user_ns, uid), GID_HASHBITS);
420 static void unix_gid_free(struct rcu_head *rcu)
422 struct unix_gid *ug = container_of(rcu, struct unix_gid, rcu);
423 struct cache_head *item = &ug->h;
425 if (test_bit(CACHE_VALID, &item->flags) &&
426 !test_bit(CACHE_NEGATIVE, &item->flags))
427 put_group_info(ug->gi);
431 static void unix_gid_put(struct kref *kref)
433 struct cache_head *item = container_of(kref, struct cache_head, ref);
434 struct unix_gid *ug = container_of(item, struct unix_gid, h);
436 call_rcu(&ug->rcu, unix_gid_free);
439 static int unix_gid_match(struct cache_head *corig, struct cache_head *cnew)
441 struct unix_gid *orig = container_of(corig, struct unix_gid, h);
442 struct unix_gid *new = container_of(cnew, struct unix_gid, h);
443 return uid_eq(orig->uid, new->uid);
445 static void unix_gid_init(struct cache_head *cnew, struct cache_head *citem)
447 struct unix_gid *new = container_of(cnew, struct unix_gid, h);
448 struct unix_gid *item = container_of(citem, struct unix_gid, h);
449 new->uid = item->uid;
451 static void unix_gid_update(struct cache_head *cnew, struct cache_head *citem)
453 struct unix_gid *new = container_of(cnew, struct unix_gid, h);
454 struct unix_gid *item = container_of(citem, struct unix_gid, h);
456 get_group_info(item->gi);
459 static struct cache_head *unix_gid_alloc(void)
461 struct unix_gid *g = kmalloc(sizeof(*g), GFP_KERNEL);
468 static int unix_gid_upcall(struct cache_detail *cd, struct cache_head *h)
470 return sunrpc_cache_pipe_upcall_timeout(cd, h);
473 static void unix_gid_request(struct cache_detail *cd,
474 struct cache_head *h,
475 char **bpp, int *blen)
478 struct unix_gid *ug = container_of(h, struct unix_gid, h);
480 snprintf(tuid, 20, "%u", from_kuid(&init_user_ns, ug->uid));
481 qword_add(bpp, blen, tuid);
485 static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, kuid_t uid);
487 static int unix_gid_parse(struct cache_detail *cd,
488 char *mesg, int mlen)
490 /* uid expiry Ngid gid0 gid1 ... gidN-1 */
498 struct unix_gid ug, *ugp;
500 if (mesg[mlen - 1] != '\n')
504 rv = get_int(&mesg, &id);
507 uid = make_kuid(current_user_ns(), id);
510 err = get_expiry(&mesg, &expiry);
514 rv = get_int(&mesg, &gids);
515 if (rv || gids < 0 || gids > 8192)
518 ug.gi = groups_alloc(gids);
522 for (i = 0 ; i < gids ; i++) {
525 rv = get_int(&mesg, &gid);
529 kgid = make_kgid(current_user_ns(), gid);
530 if (!gid_valid(kgid))
532 ug.gi->gid[i] = kgid;
536 ugp = unix_gid_lookup(cd, uid);
538 struct cache_head *ch;
540 ug.h.expiry_time = expiry;
541 ch = sunrpc_cache_update(cd,
554 put_group_info(ug.gi);
558 static int unix_gid_show(struct seq_file *m,
559 struct cache_detail *cd,
560 struct cache_head *h)
562 struct user_namespace *user_ns = m->file->f_cred->user_ns;
568 seq_puts(m, "#uid cnt: gids...\n");
571 ug = container_of(h, struct unix_gid, h);
572 if (test_bit(CACHE_VALID, &h->flags) &&
573 !test_bit(CACHE_NEGATIVE, &h->flags))
574 glen = ug->gi->ngroups;
578 seq_printf(m, "%u %d:", from_kuid_munged(user_ns, ug->uid), glen);
579 for (i = 0; i < glen; i++)
580 seq_printf(m, " %d", from_kgid_munged(user_ns, ug->gi->gid[i]));
585 static const struct cache_detail unix_gid_cache_template = {
586 .owner = THIS_MODULE,
587 .hash_size = GID_HASHMAX,
588 .name = "auth.unix.gid",
589 .cache_put = unix_gid_put,
590 .cache_upcall = unix_gid_upcall,
591 .cache_request = unix_gid_request,
592 .cache_parse = unix_gid_parse,
593 .cache_show = unix_gid_show,
594 .match = unix_gid_match,
595 .init = unix_gid_init,
596 .update = unix_gid_update,
597 .alloc = unix_gid_alloc,
600 int unix_gid_cache_create(struct net *net)
602 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
603 struct cache_detail *cd;
606 cd = cache_create_net(&unix_gid_cache_template, net);
609 err = cache_register_net(cd, net);
611 cache_destroy_net(cd, net);
614 sn->unix_gid_cache = cd;
618 void unix_gid_cache_destroy(struct net *net)
620 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
621 struct cache_detail *cd = sn->unix_gid_cache;
623 sn->unix_gid_cache = NULL;
625 cache_unregister_net(cd, net);
626 cache_destroy_net(cd, net);
629 static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, kuid_t uid)
632 struct cache_head *ch;
635 ch = sunrpc_cache_lookup_rcu(cd, &ug.h, unix_gid_hash(uid));
637 return container_of(ch, struct unix_gid, h);
642 static struct group_info *unix_gid_find(kuid_t uid, struct svc_rqst *rqstp)
645 struct group_info *gi;
647 struct sunrpc_net *sn = net_generic(rqstp->rq_xprt->xpt_net,
650 ug = unix_gid_lookup(sn->unix_gid_cache, uid);
652 return ERR_PTR(-EAGAIN);
653 ret = cache_check(sn->unix_gid_cache, &ug->h, &rqstp->rq_chandle);
656 return ERR_PTR(-ENOENT);
658 return ERR_PTR(-ESHUTDOWN);
660 gi = get_group_info(ug->gi);
661 cache_put(&ug->h, sn->unix_gid_cache);
664 return ERR_PTR(-EAGAIN);
669 svcauth_unix_set_client(struct svc_rqst *rqstp)
671 struct sockaddr_in *sin;
672 struct sockaddr_in6 *sin6, sin6_storage;
674 struct group_info *gi;
675 struct svc_cred *cred = &rqstp->rq_cred;
676 struct svc_xprt *xprt = rqstp->rq_xprt;
677 struct net *net = xprt->xpt_net;
678 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
680 switch (rqstp->rq_addr.ss_family) {
682 sin = svc_addr_in(rqstp);
683 sin6 = &sin6_storage;
684 ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &sin6->sin6_addr);
687 sin6 = svc_addr_in6(rqstp);
693 rqstp->rq_client = NULL;
694 if (rqstp->rq_proc == 0)
697 rqstp->rq_auth_stat = rpc_autherr_badcred;
698 ipm = ip_map_cached_get(xprt);
700 ipm = __ip_map_lookup(sn->ip_map_cache, rqstp->rq_server->sv_program->pg_class,
706 switch (cache_check(sn->ip_map_cache, &ipm->h, &rqstp->rq_chandle)) {
716 rqstp->rq_client = &ipm->m_client->h;
717 kref_get(&rqstp->rq_client->ref);
718 ip_map_cached_put(xprt, ipm);
722 gi = unix_gid_find(cred->cr_uid, rqstp);
723 switch (PTR_ERR(gi)) {
731 put_group_info(cred->cr_group_info);
732 cred->cr_group_info = gi;
736 rqstp->rq_auth_stat = rpc_auth_ok;
740 EXPORT_SYMBOL_GPL(svcauth_unix_set_client);
743 * svcauth_null_accept - Decode and validate incoming RPC_AUTH_NULL credential
744 * @rqstp: RPC transaction
747 * %SVC_OK: Both credential and verifier are valid
748 * %SVC_DENIED: Credential or verifier is not valid
749 * %SVC_GARBAGE: Failed to decode credential or verifier
750 * %SVC_CLOSE: Temporary failure
752 * rqstp->rq_auth_stat is set as mandated by RFC 5531.
755 svcauth_null_accept(struct svc_rqst *rqstp)
757 struct xdr_stream *xdr = &rqstp->rq_arg_stream;
758 struct svc_cred *cred = &rqstp->rq_cred;
762 /* Length of Call's credential body field: */
763 if (xdr_stream_decode_u32(xdr, &len) < 0)
766 rqstp->rq_auth_stat = rpc_autherr_badcred;
770 /* Call's verf field: */
771 if (xdr_stream_decode_opaque_auth(xdr, &flavor, &body, &len) < 0)
773 if (flavor != RPC_AUTH_NULL || len != 0) {
774 rqstp->rq_auth_stat = rpc_autherr_badverf;
778 /* Signal that mapping to nobody uid/gid is required */
779 cred->cr_uid = INVALID_UID;
780 cred->cr_gid = INVALID_GID;
781 cred->cr_group_info = groups_alloc(0);
782 if (cred->cr_group_info == NULL)
783 return SVC_CLOSE; /* kmalloc failure - client must retry */
785 if (xdr_stream_encode_opaque_auth(&rqstp->rq_res_stream,
786 RPC_AUTH_NULL, NULL, 0) < 0)
788 if (!svcxdr_set_accept_stat(rqstp))
791 rqstp->rq_cred.cr_flavor = RPC_AUTH_NULL;
796 svcauth_null_release(struct svc_rqst *rqstp)
798 if (rqstp->rq_client)
799 auth_domain_put(rqstp->rq_client);
800 rqstp->rq_client = NULL;
801 if (rqstp->rq_cred.cr_group_info)
802 put_group_info(rqstp->rq_cred.cr_group_info);
803 rqstp->rq_cred.cr_group_info = NULL;
805 return 0; /* don't drop */
809 struct auth_ops svcauth_null = {
811 .owner = THIS_MODULE,
812 .flavour = RPC_AUTH_NULL,
813 .accept = svcauth_null_accept,
814 .release = svcauth_null_release,
815 .set_client = svcauth_unix_set_client,
820 * svcauth_tls_accept - Decode and validate incoming RPC_AUTH_TLS credential
821 * @rqstp: RPC transaction
824 * %SVC_OK: Both credential and verifier are valid
825 * %SVC_DENIED: Credential or verifier is not valid
826 * %SVC_GARBAGE: Failed to decode credential or verifier
827 * %SVC_CLOSE: Temporary failure
829 * rqstp->rq_auth_stat is set as mandated by RFC 5531.
832 svcauth_tls_accept(struct svc_rqst *rqstp)
834 struct xdr_stream *xdr = &rqstp->rq_arg_stream;
835 struct svc_cred *cred = &rqstp->rq_cred;
836 struct svc_xprt *xprt = rqstp->rq_xprt;
841 /* Length of Call's credential body field: */
842 if (xdr_stream_decode_u32(xdr, &len) < 0)
845 rqstp->rq_auth_stat = rpc_autherr_badcred;
849 /* Call's verf field: */
850 if (xdr_stream_decode_opaque_auth(xdr, &flavor, &body, &len) < 0)
852 if (flavor != RPC_AUTH_NULL || len != 0) {
853 rqstp->rq_auth_stat = rpc_autherr_badverf;
857 /* AUTH_TLS is not valid on non-NULL procedures */
858 if (rqstp->rq_proc != 0) {
859 rqstp->rq_auth_stat = rpc_autherr_badcred;
863 /* Signal that mapping to nobody uid/gid is required */
864 cred->cr_uid = INVALID_UID;
865 cred->cr_gid = INVALID_GID;
866 cred->cr_group_info = groups_alloc(0);
867 if (cred->cr_group_info == NULL)
870 if (xprt->xpt_ops->xpo_handshake) {
871 p = xdr_reserve_space(&rqstp->rq_res_stream, XDR_UNIT * 2 + 8);
874 trace_svc_tls_start(xprt);
875 *p++ = rpc_auth_null;
876 *p++ = cpu_to_be32(8);
877 memcpy(p, "STARTTLS", 8);
879 set_bit(XPT_HANDSHAKE, &xprt->xpt_flags);
880 svc_xprt_enqueue(xprt);
882 trace_svc_tls_unavailable(xprt);
883 if (xdr_stream_encode_opaque_auth(&rqstp->rq_res_stream,
884 RPC_AUTH_NULL, NULL, 0) < 0)
887 if (!svcxdr_set_accept_stat(rqstp))
890 rqstp->rq_cred.cr_flavor = RPC_AUTH_TLS;
894 struct auth_ops svcauth_tls = {
896 .owner = THIS_MODULE,
897 .flavour = RPC_AUTH_TLS,
898 .accept = svcauth_tls_accept,
899 .release = svcauth_null_release,
900 .set_client = svcauth_unix_set_client,
905 * svcauth_unix_accept - Decode and validate incoming RPC_AUTH_SYS credential
906 * @rqstp: RPC transaction
909 * %SVC_OK: Both credential and verifier are valid
910 * %SVC_DENIED: Credential or verifier is not valid
911 * %SVC_GARBAGE: Failed to decode credential or verifier
912 * %SVC_CLOSE: Temporary failure
914 * rqstp->rq_auth_stat is set as mandated by RFC 5531.
917 svcauth_unix_accept(struct svc_rqst *rqstp)
919 struct xdr_stream *xdr = &rqstp->rq_arg_stream;
920 struct svc_cred *cred = &rqstp->rq_cred;
921 struct user_namespace *userns;
927 * This implementation ignores the length of the Call's
928 * credential body field and the timestamp and machinename
931 p = xdr_inline_decode(xdr, XDR_UNIT * 3);
934 len = be32_to_cpup(p + 2);
935 if (len > RPC_MAX_MACHINENAME)
937 if (!xdr_inline_decode(xdr, len))
941 * Note: we skip uid_valid()/gid_valid() checks here for
942 * backwards compatibility with clients that use -1 id's.
943 * Instead, -1 uid or gid is later mapped to the
944 * (export-specific) anonymous id by nfsd_setuser.
945 * Supplementary gid's will be left alone.
947 userns = (rqstp->rq_xprt && rqstp->rq_xprt->xpt_cred) ?
948 rqstp->rq_xprt->xpt_cred->user_ns : &init_user_ns;
949 if (xdr_stream_decode_u32(xdr, &i) < 0)
951 cred->cr_uid = make_kuid(userns, i);
952 if (xdr_stream_decode_u32(xdr, &i) < 0)
954 cred->cr_gid = make_kgid(userns, i);
956 if (xdr_stream_decode_u32(xdr, &len) < 0)
958 if (len > UNX_NGROUPS)
960 p = xdr_inline_decode(xdr, XDR_UNIT * len);
963 cred->cr_group_info = groups_alloc(len);
964 if (cred->cr_group_info == NULL)
966 for (i = 0; i < len; i++) {
967 kgid_t kgid = make_kgid(userns, be32_to_cpup(p++));
968 cred->cr_group_info->gid[i] = kgid;
970 groups_sort(cred->cr_group_info);
972 /* Call's verf field: */
973 if (xdr_stream_decode_opaque_auth(xdr, &flavor, &body, &len) < 0)
975 if (flavor != RPC_AUTH_NULL || len != 0) {
976 rqstp->rq_auth_stat = rpc_autherr_badverf;
980 if (xdr_stream_encode_opaque_auth(&rqstp->rq_res_stream,
981 RPC_AUTH_NULL, NULL, 0) < 0)
983 if (!svcxdr_set_accept_stat(rqstp))
986 rqstp->rq_cred.cr_flavor = RPC_AUTH_UNIX;
990 rqstp->rq_auth_stat = rpc_autherr_badcred;
995 svcauth_unix_release(struct svc_rqst *rqstp)
997 /* Verifier (such as it is) is already in place.
999 if (rqstp->rq_client)
1000 auth_domain_put(rqstp->rq_client);
1001 rqstp->rq_client = NULL;
1002 if (rqstp->rq_cred.cr_group_info)
1003 put_group_info(rqstp->rq_cred.cr_group_info);
1004 rqstp->rq_cred.cr_group_info = NULL;
1010 struct auth_ops svcauth_unix = {
1012 .owner = THIS_MODULE,
1013 .flavour = RPC_AUTH_UNIX,
1014 .accept = svcauth_unix_accept,
1015 .release = svcauth_unix_release,
1016 .domain_release = svcauth_unix_domain_release,
1017 .set_client = svcauth_unix_set_client,
1020 static const struct cache_detail ip_map_cache_template = {
1021 .owner = THIS_MODULE,
1022 .hash_size = IP_HASHMAX,
1023 .name = "auth.unix.ip",
1024 .cache_put = ip_map_put,
1025 .cache_upcall = ip_map_upcall,
1026 .cache_request = ip_map_request,
1027 .cache_parse = ip_map_parse,
1028 .cache_show = ip_map_show,
1029 .match = ip_map_match,
1030 .init = ip_map_init,
1032 .alloc = ip_map_alloc,
1035 int ip_map_cache_create(struct net *net)
1037 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1038 struct cache_detail *cd;
1041 cd = cache_create_net(&ip_map_cache_template, net);
1044 err = cache_register_net(cd, net);
1046 cache_destroy_net(cd, net);
1049 sn->ip_map_cache = cd;
1053 void ip_map_cache_destroy(struct net *net)
1055 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1056 struct cache_detail *cd = sn->ip_map_cache;
1058 sn->ip_map_cache = NULL;
1060 cache_unregister_net(cd, net);
1061 cache_destroy_net(cd, net);