1#include <linux/types.h>
2#include <linux/sched.h>
3#include <linux/module.h>
4#include <linux/sunrpc/types.h>
5#include <linux/sunrpc/xdr.h>
6#include <linux/sunrpc/svcsock.h>
7#include <linux/sunrpc/svcauth.h>
8#include <linux/sunrpc/gss_api.h>
9#include <linux/sunrpc/addr.h>
10#include <linux/err.h>
11#include <linux/seq_file.h>
12#include <linux/hash.h>
13#include <linux/string.h>
14#include <linux/slab.h>
15#include <net/sock.h>
16#include <net/ipv6.h>
17#include <linux/kernel.h>
18#include <linux/user_namespace.h>
19#define RPCDBG_FACILITY RPCDBG_AUTH
20
21
22#include "netns.h"
23
24
25
26
27
28
29
30
31
32struct unix_domain {
33 struct auth_domain h;
34
35};
36
37extern struct auth_ops svcauth_null;
38extern struct auth_ops svcauth_unix;
39
40static void svcauth_unix_domain_release_rcu(struct rcu_head *head)
41{
42 struct auth_domain *dom = container_of(head, struct auth_domain, rcu_head);
43 struct unix_domain *ud = container_of(dom, struct unix_domain, h);
44
45 kfree(dom->name);
46 kfree(ud);
47}
48
49static void svcauth_unix_domain_release(struct auth_domain *dom)
50{
51 call_rcu(&dom->rcu_head, svcauth_unix_domain_release_rcu);
52}
53
54struct auth_domain *unix_domain_find(char *name)
55{
56 struct auth_domain *rv;
57 struct unix_domain *new = NULL;
58
59 rv = auth_domain_find(name);
60 while(1) {
61 if (rv) {
62 if (new && rv != &new->h)
63 svcauth_unix_domain_release(&new->h);
64
65 if (rv->flavour != &svcauth_unix) {
66 auth_domain_put(rv);
67 return NULL;
68 }
69 return rv;
70 }
71
72 new = kmalloc(sizeof(*new), GFP_KERNEL);
73 if (new == NULL)
74 return NULL;
75 kref_init(&new->h.ref);
76 new->h.name = kstrdup(name, GFP_KERNEL);
77 if (new->h.name == NULL) {
78 kfree(new);
79 return NULL;
80 }
81 new->h.flavour = &svcauth_unix;
82 rv = auth_domain_lookup(name, &new->h);
83 }
84}
85EXPORT_SYMBOL_GPL(unix_domain_find);
86
87
88
89
90
91
92#define IP_HASHBITS 8
93#define IP_HASHMAX (1<<IP_HASHBITS)
94
95struct ip_map {
96 struct cache_head h;
97 char m_class[8];
98 struct in6_addr m_addr;
99 struct unix_domain *m_client;
100 struct rcu_head m_rcu;
101};
102
103static void ip_map_put(struct kref *kref)
104{
105 struct cache_head *item = container_of(kref, struct cache_head, ref);
106 struct ip_map *im = container_of(item, struct ip_map,h);
107
108 if (test_bit(CACHE_VALID, &item->flags) &&
109 !test_bit(CACHE_NEGATIVE, &item->flags))
110 auth_domain_put(&im->m_client->h);
111 kfree_rcu(im, m_rcu);
112}
113
114static inline int hash_ip6(const struct in6_addr *ip)
115{
116 return hash_32(ipv6_addr_hash(ip), IP_HASHBITS);
117}
118static int ip_map_match(struct cache_head *corig, struct cache_head *cnew)
119{
120 struct ip_map *orig = container_of(corig, struct ip_map, h);
121 struct ip_map *new = container_of(cnew, struct ip_map, h);
122 return strcmp(orig->m_class, new->m_class) == 0 &&
123 ipv6_addr_equal(&orig->m_addr, &new->m_addr);
124}
125static void ip_map_init(struct cache_head *cnew, struct cache_head *citem)
126{
127 struct ip_map *new = container_of(cnew, struct ip_map, h);
128 struct ip_map *item = container_of(citem, struct ip_map, h);
129
130 strcpy(new->m_class, item->m_class);
131 new->m_addr = item->m_addr;
132}
133static void update(struct cache_head *cnew, struct cache_head *citem)
134{
135 struct ip_map *new = container_of(cnew, struct ip_map, h);
136 struct ip_map *item = container_of(citem, struct ip_map, h);
137
138 kref_get(&item->m_client->h.ref);
139 new->m_client = item->m_client;
140}
141static struct cache_head *ip_map_alloc(void)
142{
143 struct ip_map *i = kmalloc(sizeof(*i), GFP_KERNEL);
144 if (i)
145 return &i->h;
146 else
147 return NULL;
148}
149
150static int ip_map_upcall(struct cache_detail *cd, struct cache_head *h)
151{
152 return sunrpc_cache_pipe_upcall(cd, h);
153}
154
155static void ip_map_request(struct cache_detail *cd,
156 struct cache_head *h,
157 char **bpp, int *blen)
158{
159 char text_addr[40];
160 struct ip_map *im = container_of(h, struct ip_map, h);
161
162 if (ipv6_addr_v4mapped(&(im->m_addr))) {
163 snprintf(text_addr, 20, "%pI4", &im->m_addr.s6_addr32[3]);
164 } else {
165 snprintf(text_addr, 40, "%pI6", &im->m_addr);
166 }
167 qword_add(bpp, blen, im->m_class);
168 qword_add(bpp, blen, text_addr);
169 (*bpp)[-1] = '\n';
170}
171
172static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, struct in6_addr *addr);
173static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm, struct unix_domain *udom, time64_t expiry);
174
175static int ip_map_parse(struct cache_detail *cd,
176 char *mesg, int mlen)
177{
178
179
180
181 char *buf = mesg;
182 int len;
183 char class[8];
184 union {
185 struct sockaddr sa;
186 struct sockaddr_in s4;
187 struct sockaddr_in6 s6;
188 } address;
189 struct sockaddr_in6 sin6;
190 int err;
191
192 struct ip_map *ipmp;
193 struct auth_domain *dom;
194 time64_t expiry;
195
196 if (mesg[mlen-1] != '\n')
197 return -EINVAL;
198 mesg[mlen-1] = 0;
199
200
201 len = qword_get(&mesg, class, sizeof(class));
202 if (len <= 0) return -EINVAL;
203
204
205 len = qword_get(&mesg, buf, mlen);
206 if (len <= 0) return -EINVAL;
207
208 if (rpc_pton(cd->net, buf, len, &address.sa, sizeof(address)) == 0)
209 return -EINVAL;
210 switch (address.sa.sa_family) {
211 case AF_INET:
212
213 sin6.sin6_family = AF_INET6;
214 ipv6_addr_set_v4mapped(address.s4.sin_addr.s_addr,
215 &sin6.sin6_addr);
216 break;
217#if IS_ENABLED(CONFIG_IPV6)
218 case AF_INET6:
219 memcpy(&sin6, &address.s6, sizeof(sin6));
220 break;
221#endif
222 default:
223 return -EINVAL;
224 }
225
226 expiry = get_expiry(&mesg);
227 if (expiry ==0)
228 return -EINVAL;
229
230
231 len = qword_get(&mesg, buf, mlen);
232 if (len < 0) return -EINVAL;
233
234 if (len) {
235 dom = unix_domain_find(buf);
236 if (dom == NULL)
237 return -ENOENT;
238 } else
239 dom = NULL;
240
241
242 ipmp = __ip_map_lookup(cd, class, &sin6.sin6_addr);
243 if (ipmp) {
244 err = __ip_map_update(cd, ipmp,
245 container_of(dom, struct unix_domain, h),
246 expiry);
247 } else
248 err = -ENOMEM;
249
250 if (dom)
251 auth_domain_put(dom);
252
253 cache_flush();
254 return err;
255}
256
257static int ip_map_show(struct seq_file *m,
258 struct cache_detail *cd,
259 struct cache_head *h)
260{
261 struct ip_map *im;
262 struct in6_addr addr;
263 char *dom = "-no-domain-";
264
265 if (h == NULL) {
266 seq_puts(m, "#class IP domain\n");
267 return 0;
268 }
269 im = container_of(h, struct ip_map, h);
270
271 addr = im->m_addr;
272
273 if (test_bit(CACHE_VALID, &h->flags) &&
274 !test_bit(CACHE_NEGATIVE, &h->flags))
275 dom = im->m_client->h.name;
276
277 if (ipv6_addr_v4mapped(&addr)) {
278 seq_printf(m, "%s %pI4 %s\n",
279 im->m_class, &addr.s6_addr32[3], dom);
280 } else {
281 seq_printf(m, "%s %pI6 %s\n", im->m_class, &addr, dom);
282 }
283 return 0;
284}
285
286
287static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class,
288 struct in6_addr *addr)
289{
290 struct ip_map ip;
291 struct cache_head *ch;
292
293 strcpy(ip.m_class, class);
294 ip.m_addr = *addr;
295 ch = sunrpc_cache_lookup_rcu(cd, &ip.h,
296 hash_str(class, IP_HASHBITS) ^
297 hash_ip6(addr));
298
299 if (ch)
300 return container_of(ch, struct ip_map, h);
301 else
302 return NULL;
303}
304
305static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm,
306 struct unix_domain *udom, time64_t expiry)
307{
308 struct ip_map ip;
309 struct cache_head *ch;
310
311 ip.m_client = udom;
312 ip.h.flags = 0;
313 if (!udom)
314 set_bit(CACHE_NEGATIVE, &ip.h.flags);
315 ip.h.expiry_time = expiry;
316 ch = sunrpc_cache_update(cd, &ip.h, &ipm->h,
317 hash_str(ipm->m_class, IP_HASHBITS) ^
318 hash_ip6(&ipm->m_addr));
319 if (!ch)
320 return -ENOMEM;
321 cache_put(ch, cd);
322 return 0;
323}
324
325void svcauth_unix_purge(struct net *net)
326{
327 struct sunrpc_net *sn;
328
329 sn = net_generic(net, sunrpc_net_id);
330 cache_purge(sn->ip_map_cache);
331}
332EXPORT_SYMBOL_GPL(svcauth_unix_purge);
333
334static inline struct ip_map *
335ip_map_cached_get(struct svc_xprt *xprt)
336{
337 struct ip_map *ipm = NULL;
338 struct sunrpc_net *sn;
339
340 if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) {
341 spin_lock(&xprt->xpt_lock);
342 ipm = xprt->xpt_auth_cache;
343 if (ipm != NULL) {
344 sn = net_generic(xprt->xpt_net, sunrpc_net_id);
345 if (cache_is_expired(sn->ip_map_cache, &ipm->h)) {
346
347
348
349
350
351 xprt->xpt_auth_cache = NULL;
352 spin_unlock(&xprt->xpt_lock);
353 cache_put(&ipm->h, sn->ip_map_cache);
354 return NULL;
355 }
356 cache_get(&ipm->h);
357 }
358 spin_unlock(&xprt->xpt_lock);
359 }
360 return ipm;
361}
362
363static inline void
364ip_map_cached_put(struct svc_xprt *xprt, struct ip_map *ipm)
365{
366 if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) {
367 spin_lock(&xprt->xpt_lock);
368 if (xprt->xpt_auth_cache == NULL) {
369
370 xprt->xpt_auth_cache = ipm;
371 ipm = NULL;
372 }
373 spin_unlock(&xprt->xpt_lock);
374 }
375 if (ipm) {
376 struct sunrpc_net *sn;
377
378 sn = net_generic(xprt->xpt_net, sunrpc_net_id);
379 cache_put(&ipm->h, sn->ip_map_cache);
380 }
381}
382
383void
384svcauth_unix_info_release(struct svc_xprt *xpt)
385{
386 struct ip_map *ipm;
387
388 ipm = xpt->xpt_auth_cache;
389 if (ipm != NULL) {
390 struct sunrpc_net *sn;
391
392 sn = net_generic(xpt->xpt_net, sunrpc_net_id);
393 cache_put(&ipm->h, sn->ip_map_cache);
394 }
395}
396
397
398
399
400
401
402#define GID_HASHBITS 8
403#define GID_HASHMAX (1<<GID_HASHBITS)
404
405struct unix_gid {
406 struct cache_head h;
407 kuid_t uid;
408 struct group_info *gi;
409 struct rcu_head rcu;
410};
411
412static int unix_gid_hash(kuid_t uid)
413{
414 return hash_long(from_kuid(&init_user_ns, uid), GID_HASHBITS);
415}
416
417static void unix_gid_put(struct kref *kref)
418{
419 struct cache_head *item = container_of(kref, struct cache_head, ref);
420 struct unix_gid *ug = container_of(item, struct unix_gid, h);
421 if (test_bit(CACHE_VALID, &item->flags) &&
422 !test_bit(CACHE_NEGATIVE, &item->flags))
423 put_group_info(ug->gi);
424 kfree_rcu(ug, rcu);
425}
426
427static int unix_gid_match(struct cache_head *corig, struct cache_head *cnew)
428{
429 struct unix_gid *orig = container_of(corig, struct unix_gid, h);
430 struct unix_gid *new = container_of(cnew, struct unix_gid, h);
431 return uid_eq(orig->uid, new->uid);
432}
433static void unix_gid_init(struct cache_head *cnew, struct cache_head *citem)
434{
435 struct unix_gid *new = container_of(cnew, struct unix_gid, h);
436 struct unix_gid *item = container_of(citem, struct unix_gid, h);
437 new->uid = item->uid;
438}
439static void unix_gid_update(struct cache_head *cnew, struct cache_head *citem)
440{
441 struct unix_gid *new = container_of(cnew, struct unix_gid, h);
442 struct unix_gid *item = container_of(citem, struct unix_gid, h);
443
444 get_group_info(item->gi);
445 new->gi = item->gi;
446}
447static struct cache_head *unix_gid_alloc(void)
448{
449 struct unix_gid *g = kmalloc(sizeof(*g), GFP_KERNEL);
450 if (g)
451 return &g->h;
452 else
453 return NULL;
454}
455
456static int unix_gid_upcall(struct cache_detail *cd, struct cache_head *h)
457{
458 return sunrpc_cache_pipe_upcall_timeout(cd, h);
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
468 snprintf(tuid, 20, "%u", from_kuid(&init_user_ns, ug->uid));
469 qword_add(bpp, blen, tuid);
470 (*bpp)[-1] = '\n';
471}
472
473static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, kuid_t uid);
474
475static int unix_gid_parse(struct cache_detail *cd,
476 char *mesg, int mlen)
477{
478
479 int id;
480 kuid_t uid;
481 int gids;
482 int rv;
483 int i;
484 int err;
485 time64_t expiry;
486 struct unix_gid ug, *ugp;
487
488 if (mesg[mlen - 1] != '\n')
489 return -EINVAL;
490 mesg[mlen-1] = 0;
491
492 rv = get_int(&mesg, &id);
493 if (rv)
494 return -EINVAL;
495 uid = make_kuid(current_user_ns(), id);
496 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;
512 kgid_t kgid;
513 rv = get_int(&mesg, &gid);
514 err = -EINVAL;
515 if (rv)
516 goto out;
517 kgid = make_kgid(current_user_ns(), gid);
518 if (!gid_valid(kgid))
519 goto out;
520 ug.gi->gid[i] = kgid;
521 }
522
523 groups_sort(ug.gi);
524 ugp = unix_gid_lookup(cd, uid);
525 if (ugp) {
526 struct cache_head *ch;
527 ug.h.flags = 0;
528 ug.h.expiry_time = expiry;
529 ch = sunrpc_cache_update(cd,
530 &ug.h, &ugp->h,
531 unix_gid_hash(uid));
532 if (!ch)
533 err = -ENOMEM;
534 else {
535 err = 0;
536 cache_put(ch, cd);
537 }
538 } else
539 err = -ENOMEM;
540 out:
541 if (ug.gi)
542 put_group_info(ug.gi);
543 return err;
544}
545
546static int unix_gid_show(struct seq_file *m,
547 struct cache_detail *cd,
548 struct cache_head *h)
549{
550 struct user_namespace *user_ns = m->file->f_cred->user_ns;
551 struct unix_gid *ug;
552 int i;
553 int glen;
554
555 if (h == NULL) {
556 seq_puts(m, "#uid cnt: gids...\n");
557 return 0;
558 }
559 ug = container_of(h, struct unix_gid, h);
560 if (test_bit(CACHE_VALID, &h->flags) &&
561 !test_bit(CACHE_NEGATIVE, &h->flags))
562 glen = ug->gi->ngroups;
563 else
564 glen = 0;
565
566 seq_printf(m, "%u %d:", from_kuid_munged(user_ns, ug->uid), glen);
567 for (i = 0; i < glen; i++)
568 seq_printf(m, " %d", from_kgid_munged(user_ns, ug->gi->gid[i]));
569 seq_printf(m, "\n");
570 return 0;
571}
572
573static const struct cache_detail unix_gid_cache_template = {
574 .owner = THIS_MODULE,
575 .hash_size = GID_HASHMAX,
576 .name = "auth.unix.gid",
577 .cache_put = unix_gid_put,
578 .cache_upcall = unix_gid_upcall,
579 .cache_request = unix_gid_request,
580 .cache_parse = unix_gid_parse,
581 .cache_show = unix_gid_show,
582 .match = unix_gid_match,
583 .init = unix_gid_init,
584 .update = unix_gid_update,
585 .alloc = unix_gid_alloc,
586};
587
588int unix_gid_cache_create(struct net *net)
589{
590 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
591 struct cache_detail *cd;
592 int err;
593
594 cd = cache_create_net(&unix_gid_cache_template, net);
595 if (IS_ERR(cd))
596 return PTR_ERR(cd);
597 err = cache_register_net(cd, net);
598 if (err) {
599 cache_destroy_net(cd, net);
600 return err;
601 }
602 sn->unix_gid_cache = cd;
603 return 0;
604}
605
606void unix_gid_cache_destroy(struct net *net)
607{
608 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
609 struct cache_detail *cd = sn->unix_gid_cache;
610
611 sn->unix_gid_cache = NULL;
612 cache_purge(cd);
613 cache_unregister_net(cd, net);
614 cache_destroy_net(cd, net);
615}
616
617static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, kuid_t uid)
618{
619 struct unix_gid ug;
620 struct cache_head *ch;
621
622 ug.uid = uid;
623 ch = sunrpc_cache_lookup_rcu(cd, &ug.h, unix_gid_hash(uid));
624 if (ch)
625 return container_of(ch, struct unix_gid, h);
626 else
627 return NULL;
628}
629
630static struct group_info *unix_gid_find(kuid_t uid, struct svc_rqst *rqstp)
631{
632 struct unix_gid *ug;
633 struct group_info *gi;
634 int ret;
635 struct sunrpc_net *sn = net_generic(rqstp->rq_xprt->xpt_net,
636 sunrpc_net_id);
637
638 ug = unix_gid_lookup(sn->unix_gid_cache, uid);
639 if (!ug)
640 return ERR_PTR(-EAGAIN);
641 ret = cache_check(sn->unix_gid_cache, &ug->h, &rqstp->rq_chandle);
642 switch (ret) {
643 case -ENOENT:
644 return ERR_PTR(-ENOENT);
645 case -ETIMEDOUT:
646 return ERR_PTR(-ESHUTDOWN);
647 case 0:
648 gi = get_group_info(ug->gi);
649 cache_put(&ug->h, sn->unix_gid_cache);
650 return gi;
651 default:
652 return ERR_PTR(-EAGAIN);
653 }
654}
655
656int
657svcauth_unix_set_client(struct svc_rqst *rqstp)
658{
659 struct sockaddr_in *sin;
660 struct sockaddr_in6 *sin6, sin6_storage;
661 struct ip_map *ipm;
662 struct group_info *gi;
663 struct svc_cred *cred = &rqstp->rq_cred;
664 struct svc_xprt *xprt = rqstp->rq_xprt;
665 struct net *net = xprt->xpt_net;
666 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
667
668 switch (rqstp->rq_addr.ss_family) {
669 case AF_INET:
670 sin = svc_addr_in(rqstp);
671 sin6 = &sin6_storage;
672 ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &sin6->sin6_addr);
673 break;
674 case AF_INET6:
675 sin6 = svc_addr_in6(rqstp);
676 break;
677 default:
678 BUG();
679 }
680
681 rqstp->rq_client = NULL;
682 if (rqstp->rq_proc == 0)
683 return SVC_OK;
684
685 ipm = ip_map_cached_get(xprt);
686 if (ipm == NULL)
687 ipm = __ip_map_lookup(sn->ip_map_cache, rqstp->rq_server->sv_program->pg_class,
688 &sin6->sin6_addr);
689
690 if (ipm == NULL)
691 return SVC_DENIED;
692
693 switch (cache_check(sn->ip_map_cache, &ipm->h, &rqstp->rq_chandle)) {
694 default:
695 BUG();
696 case -ETIMEDOUT:
697 return SVC_CLOSE;
698 case -EAGAIN:
699 return SVC_DROP;
700 case -ENOENT:
701 return SVC_DENIED;
702 case 0:
703 rqstp->rq_client = &ipm->m_client->h;
704 kref_get(&rqstp->rq_client->ref);
705 ip_map_cached_put(xprt, ipm);
706 break;
707 }
708
709 gi = unix_gid_find(cred->cr_uid, rqstp);
710 switch (PTR_ERR(gi)) {
711 case -EAGAIN:
712 return SVC_DROP;
713 case -ESHUTDOWN:
714 return SVC_CLOSE;
715 case -ENOENT:
716 break;
717 default:
718 put_group_info(cred->cr_group_info);
719 cred->cr_group_info = gi;
720 }
721 return SVC_OK;
722}
723
724EXPORT_SYMBOL_GPL(svcauth_unix_set_client);
725
726static int
727svcauth_null_accept(struct svc_rqst *rqstp, __be32 *authp)
728{
729 struct kvec *argv = &rqstp->rq_arg.head[0];
730 struct kvec *resv = &rqstp->rq_res.head[0];
731 struct svc_cred *cred = &rqstp->rq_cred;
732
733 if (argv->iov_len < 3*4)
734 return SVC_GARBAGE;
735
736 if (svc_getu32(argv) != 0) {
737 dprintk("svc: bad null cred\n");
738 *authp = rpc_autherr_badcred;
739 return SVC_DENIED;
740 }
741 if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) {
742 dprintk("svc: bad null verf\n");
743 *authp = rpc_autherr_badverf;
744 return SVC_DENIED;
745 }
746
747
748 cred->cr_uid = INVALID_UID;
749 cred->cr_gid = INVALID_GID;
750 cred->cr_group_info = groups_alloc(0);
751 if (cred->cr_group_info == NULL)
752 return SVC_CLOSE;
753
754
755 svc_putnl(resv, RPC_AUTH_NULL);
756 svc_putnl(resv, 0);
757
758 rqstp->rq_cred.cr_flavor = RPC_AUTH_NULL;
759 return SVC_OK;
760}
761
762static int
763svcauth_null_release(struct svc_rqst *rqstp)
764{
765 if (rqstp->rq_client)
766 auth_domain_put(rqstp->rq_client);
767 rqstp->rq_client = NULL;
768 if (rqstp->rq_cred.cr_group_info)
769 put_group_info(rqstp->rq_cred.cr_group_info);
770 rqstp->rq_cred.cr_group_info = NULL;
771
772 return 0;
773}
774
775
776struct auth_ops svcauth_null = {
777 .name = "null",
778 .owner = THIS_MODULE,
779 .flavour = RPC_AUTH_NULL,
780 .accept = svcauth_null_accept,
781 .release = svcauth_null_release,
782 .set_client = svcauth_unix_set_client,
783};
784
785
786static int
787svcauth_unix_accept(struct svc_rqst *rqstp, __be32 *authp)
788{
789 struct kvec *argv = &rqstp->rq_arg.head[0];
790 struct kvec *resv = &rqstp->rq_res.head[0];
791 struct svc_cred *cred = &rqstp->rq_cred;
792 struct user_namespace *userns;
793 u32 slen, i;
794 int len = argv->iov_len;
795
796 if ((len -= 3*4) < 0)
797 return SVC_GARBAGE;
798
799 svc_getu32(argv);
800 svc_getu32(argv);
801 slen = XDR_QUADLEN(svc_getnl(argv));
802 if (slen > 64 || (len -= (slen + 3)*4) < 0)
803 goto badcred;
804 argv->iov_base = (void*)((__be32*)argv->iov_base + slen);
805 argv->iov_len -= slen*4;
806
807
808
809
810
811
812
813 userns = (rqstp->rq_xprt && rqstp->rq_xprt->xpt_cred) ?
814 rqstp->rq_xprt->xpt_cred->user_ns : &init_user_ns;
815 cred->cr_uid = make_kuid(userns, svc_getnl(argv));
816 cred->cr_gid = make_kgid(userns, svc_getnl(argv));
817 slen = svc_getnl(argv);
818 if (slen > UNX_NGROUPS || (len -= (slen + 2)*4) < 0)
819 goto badcred;
820 cred->cr_group_info = groups_alloc(slen);
821 if (cred->cr_group_info == NULL)
822 return SVC_CLOSE;
823 for (i = 0; i < slen; i++) {
824 kgid_t kgid = make_kgid(userns, svc_getnl(argv));
825 cred->cr_group_info->gid[i] = kgid;
826 }
827 groups_sort(cred->cr_group_info);
828 if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) {
829 *authp = rpc_autherr_badverf;
830 return SVC_DENIED;
831 }
832
833
834 svc_putnl(resv, RPC_AUTH_NULL);
835 svc_putnl(resv, 0);
836
837 rqstp->rq_cred.cr_flavor = RPC_AUTH_UNIX;
838 return SVC_OK;
839
840badcred:
841 *authp = rpc_autherr_badcred;
842 return SVC_DENIED;
843}
844
845static int
846svcauth_unix_release(struct svc_rqst *rqstp)
847{
848
849
850 if (rqstp->rq_client)
851 auth_domain_put(rqstp->rq_client);
852 rqstp->rq_client = NULL;
853 if (rqstp->rq_cred.cr_group_info)
854 put_group_info(rqstp->rq_cred.cr_group_info);
855 rqstp->rq_cred.cr_group_info = NULL;
856
857 return 0;
858}
859
860
861struct auth_ops svcauth_unix = {
862 .name = "unix",
863 .owner = THIS_MODULE,
864 .flavour = RPC_AUTH_UNIX,
865 .accept = svcauth_unix_accept,
866 .release = svcauth_unix_release,
867 .domain_release = svcauth_unix_domain_release,
868 .set_client = svcauth_unix_set_client,
869};
870
871static const struct cache_detail ip_map_cache_template = {
872 .owner = THIS_MODULE,
873 .hash_size = IP_HASHMAX,
874 .name = "auth.unix.ip",
875 .cache_put = ip_map_put,
876 .cache_upcall = ip_map_upcall,
877 .cache_request = ip_map_request,
878 .cache_parse = ip_map_parse,
879 .cache_show = ip_map_show,
880 .match = ip_map_match,
881 .init = ip_map_init,
882 .update = update,
883 .alloc = ip_map_alloc,
884};
885
886int ip_map_cache_create(struct net *net)
887{
888 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
889 struct cache_detail *cd;
890 int err;
891
892 cd = cache_create_net(&ip_map_cache_template, net);
893 if (IS_ERR(cd))
894 return PTR_ERR(cd);
895 err = cache_register_net(cd, net);
896 if (err) {
897 cache_destroy_net(cd, net);
898 return err;
899 }
900 sn->ip_map_cache = cd;
901 return 0;
902}
903
904void ip_map_cache_destroy(struct net *net)
905{
906 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
907 struct cache_detail *cd = sn->ip_map_cache;
908
909 sn->ip_map_cache = NULL;
910 cache_purge(cd);
911 cache_unregister_net(cd, net);
912 cache_destroy_net(cd, net);
913}
914
