1
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>
16#include <net/sock.h>
17#include <net/ipv6.h>
18#include <linux/kernel.h>
19#include <linux/user_namespace.h>
20#define RPCDBG_FACILITY RPCDBG_AUTH
21
22
23#include "netns.h"
24
25
26
27
28
29
30
31
32
33struct unix_domain {
34 struct auth_domain h;
35
36};
37
38extern struct auth_ops svcauth_null;
39extern struct auth_ops svcauth_unix;
40
41static void svcauth_unix_domain_release_rcu(struct rcu_head *head)
42{
43 struct auth_domain *dom = container_of(head, struct auth_domain, rcu_head);
44 struct unix_domain *ud = container_of(dom, struct unix_domain, h);
45
46 kfree(dom->name);
47 kfree(ud);
48}
49
50static void svcauth_unix_domain_release(struct auth_domain *dom)
51{
52 call_rcu(&dom->rcu_head, svcauth_unix_domain_release_rcu);
53}
54
55struct auth_domain *unix_domain_find(char *name)
56{
57 struct auth_domain *rv;
58 struct unix_domain *new = NULL;
59
60 rv = auth_domain_find(name);
61 while(1) {
62 if (rv) {
63 if (new && rv != &new->h)
64 svcauth_unix_domain_release(&new->h);
65
66 if (rv->flavour != &svcauth_unix) {
67 auth_domain_put(rv);
68 return NULL;
69 }
70 return rv;
71 }
72
73 new = kmalloc(sizeof(*new), GFP_KERNEL);
74 if (new == NULL)
75 return NULL;
76 kref_init(&new->h.ref);
77 new->h.name = kstrdup(name, GFP_KERNEL);
78 if (new->h.name == NULL) {
79 kfree(new);
80 return NULL;
81 }
82 new->h.flavour = &svcauth_unix;
83 rv = auth_domain_lookup(name, &new->h);
84 }
85}
86EXPORT_SYMBOL_GPL(unix_domain_find);
87
88
89
90
91
92
93#define IP_HASHBITS 8
94#define IP_HASHMAX (1<<IP_HASHBITS)
95
96struct ip_map {
97 struct cache_head h;
98 char m_class[8];
99 struct in6_addr m_addr;
100 struct unix_domain *m_client;
101 struct rcu_head m_rcu;
102};
103
104static void ip_map_put(struct kref *kref)
105{
106 struct cache_head *item = container_of(kref, struct cache_head, ref);
107 struct ip_map *im = container_of(item, struct ip_map,h);
108
109 if (test_bit(CACHE_VALID, &item->flags) &&
110 !test_bit(CACHE_NEGATIVE, &item->flags))
111 auth_domain_put(&im->m_client->h);
112 kfree_rcu(im, m_rcu);
113}
114
115static inline int hash_ip6(const struct in6_addr *ip)
116{
117 return hash_32(ipv6_addr_hash(ip), IP_HASHBITS);
118}
119static int ip_map_match(struct cache_head *corig, struct cache_head *cnew)
120{
121 struct ip_map *orig = container_of(corig, struct ip_map, h);
122 struct ip_map *new = container_of(cnew, struct ip_map, h);
123 return strcmp(orig->m_class, new->m_class) == 0 &&
124 ipv6_addr_equal(&orig->m_addr, &new->m_addr);
125}
126static void ip_map_init(struct cache_head *cnew, struct cache_head *citem)
127{
128 struct ip_map *new = container_of(cnew, struct ip_map, h);
129 struct ip_map *item = container_of(citem, struct ip_map, h);
130
131 strcpy(new->m_class, item->m_class);
132 new->m_addr = item->m_addr;
133}
134static void update(struct cache_head *cnew, struct cache_head *citem)
135{
136 struct ip_map *new = container_of(cnew, struct ip_map, h);
137 struct ip_map *item = container_of(citem, struct ip_map, h);
138
139 kref_get(&item->m_client->h.ref);
140 new->m_client = item->m_client;
141}
142static struct cache_head *ip_map_alloc(void)
143{
144 struct ip_map *i = kmalloc(sizeof(*i), GFP_KERNEL);
145 if (i)
146 return &i->h;
147 else
148 return NULL;
149}
150
151static int ip_map_upcall(struct cache_detail *cd, struct cache_head *h)
152{
153 return sunrpc_cache_pipe_upcall(cd, h);
154}
155
156static void ip_map_request(struct cache_detail *cd,
157 struct cache_head *h,
158 char **bpp, int *blen)
159{
160 char text_addr[40];
161 struct ip_map *im = container_of(h, struct ip_map, h);
162
163 if (ipv6_addr_v4mapped(&(im->m_addr))) {
164 snprintf(text_addr, 20, "%pI4", &im->m_addr.s6_addr32[3]);
165 } else {
166 snprintf(text_addr, 40, "%pI6", &im->m_addr);
167 }
168 qword_add(bpp, blen, im->m_class);
169 qword_add(bpp, blen, text_addr);
170 (*bpp)[-1] = '\n';
171}
172
173static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, struct in6_addr *addr);
174static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm, struct unix_domain *udom, time64_t expiry);
175
176static int ip_map_parse(struct cache_detail *cd,
177 char *mesg, int mlen)
178{
179
180
181
182 char *buf = mesg;
183 int len;
184 char class[8];
185 union {
186 struct sockaddr sa;
187 struct sockaddr_in s4;
188 struct sockaddr_in6 s6;
189 } address;
190 struct sockaddr_in6 sin6;
191 int err;
192
193 struct ip_map *ipmp;
194 struct auth_domain *dom;
195 time64_t expiry;
196
197 if (mesg[mlen-1] != '\n')
198 return -EINVAL;
199 mesg[mlen-1] = 0;
200
201
202 len = qword_get(&mesg, class, sizeof(class));
203 if (len <= 0) return -EINVAL;
204
205
206 len = qword_get(&mesg, buf, mlen);
207 if (len <= 0) return -EINVAL;
208
209 if (rpc_pton(cd->net, buf, len, &address.sa, sizeof(address)) == 0)
210 return -EINVAL;
211 switch (address.sa.sa_family) {
212 case AF_INET:
213
214 sin6.sin6_family = AF_INET6;
215 ipv6_addr_set_v4mapped(address.s4.sin_addr.s_addr,
216 &sin6.sin6_addr);
217 break;
218#if IS_ENABLED(CONFIG_IPV6)
219 case AF_INET6:
220 memcpy(&sin6, &address.s6, sizeof(sin6));
221 break;
222#endif
223 default:
224 return -EINVAL;
225 }
226
227 expiry = get_expiry(&mesg);
228 if (expiry ==0)
229 return -EINVAL;
230
231
232 len = qword_get(&mesg, buf, mlen);
233 if (len < 0) return -EINVAL;
234
235 if (len) {
236 dom = unix_domain_find(buf);
237 if (dom == NULL)
238 return -ENOENT;
239 } else
240 dom = NULL;
241
242
243 ipmp = __ip_map_lookup(cd, class, &sin6.sin6_addr);
244 if (ipmp) {
245 err = __ip_map_update(cd, ipmp,
246 container_of(dom, struct unix_domain, h),
247 expiry);
248 } else
249 err = -ENOMEM;
250
251 if (dom)
252 auth_domain_put(dom);
253
254 cache_flush();
255 return err;
256}
257
258static int ip_map_show(struct seq_file *m,
259 struct cache_detail *cd,
260 struct cache_head *h)
261{
262 struct ip_map *im;
263 struct in6_addr addr;
264 char *dom = "-no-domain-";
265
266 if (h == NULL) {
267 seq_puts(m, "#class IP domain\n");
268 return 0;
269 }
270 im = container_of(h, struct ip_map, h);
271
272 addr = im->m_addr;
273
274 if (test_bit(CACHE_VALID, &h->flags) &&
275 !test_bit(CACHE_NEGATIVE, &h->flags))
276 dom = im->m_client->h.name;
277
278 if (ipv6_addr_v4mapped(&addr)) {
279 seq_printf(m, "%s %pI4 %s\n",
280 im->m_class, &addr.s6_addr32[3], dom);
281 } else {
282 seq_printf(m, "%s %pI6 %s\n", im->m_class, &addr, dom);
283 }
284 return 0;
285}
286
287
288static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class,
289 struct in6_addr *addr)
290{
291 struct ip_map ip;
292 struct cache_head *ch;
293
294 strcpy(ip.m_class, class);
295 ip.m_addr = *addr;
296 ch = sunrpc_cache_lookup_rcu(cd, &ip.h,
297 hash_str(class, IP_HASHBITS) ^
298 hash_ip6(addr));
299
300 if (ch)
301 return container_of(ch, struct ip_map, h);
302 else
303 return NULL;
304}
305
306static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm,
307 struct unix_domain *udom, time64_t expiry)
308{
309 struct ip_map ip;
310 struct cache_head *ch;
311
312 ip.m_client = udom;
313 ip.h.flags = 0;
314 if (!udom)
315 set_bit(CACHE_NEGATIVE, &ip.h.flags);
316 ip.h.expiry_time = expiry;
317 ch = sunrpc_cache_update(cd, &ip.h, &ipm->h,
318 hash_str(ipm->m_class, IP_HASHBITS) ^
319 hash_ip6(&ipm->m_addr));
320 if (!ch)
321 return -ENOMEM;
322 cache_put(ch, cd);
323 return 0;
324}
325
326void svcauth_unix_purge(struct net *net)
327{
328 struct sunrpc_net *sn;
329
330 sn = net_generic(net, sunrpc_net_id);
331 cache_purge(sn->ip_map_cache);
332}
333EXPORT_SYMBOL_GPL(svcauth_unix_purge);
334
335static inline struct ip_map *
336ip_map_cached_get(struct svc_xprt *xprt)
337{
338 struct ip_map *ipm = NULL;
339 struct sunrpc_net *sn;
340
341 if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) {
342 spin_lock(&xprt->xpt_lock);
343 ipm = xprt->xpt_auth_cache;
344 if (ipm != NULL) {
345 sn = net_generic(xprt->xpt_net, sunrpc_net_id);
346 if (cache_is_expired(sn->ip_map_cache, &ipm->h)) {
347
348
349
350
351
352 xprt->xpt_auth_cache = NULL;
353 spin_unlock(&xprt->xpt_lock);
354 cache_put(&ipm->h, sn->ip_map_cache);
355 return NULL;
356 }
357 cache_get(&ipm->h);
358 }
359 spin_unlock(&xprt->xpt_lock);
360 }
361 return ipm;
362}
363
364static inline void
365ip_map_cached_put(struct svc_xprt *xprt, struct ip_map *ipm)
366{
367 if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) {
368 spin_lock(&xprt->xpt_lock);
369 if (xprt->xpt_auth_cache == NULL) {
370
371 xprt->xpt_auth_cache = ipm;
372 ipm = NULL;
373 }
374 spin_unlock(&xprt->xpt_lock);
375 }
376 if (ipm) {
377 struct sunrpc_net *sn;
378
379 sn = net_generic(xprt->xpt_net, sunrpc_net_id);
380 cache_put(&ipm->h, sn->ip_map_cache);
381 }
382}
383
384void
385svcauth_unix_info_release(struct svc_xprt *xpt)
386{
387 struct ip_map *ipm;
388
389 ipm = xpt->xpt_auth_cache;
390 if (ipm != NULL) {
391 struct sunrpc_net *sn;
392
393 sn = net_generic(xpt->xpt_net, sunrpc_net_id);
394 cache_put(&ipm->h, sn->ip_map_cache);
395 }
396}
397
398
399
400
401
402
403#define GID_HASHBITS 8
404#define GID_HASHMAX (1<<GID_HASHBITS)
405
406struct unix_gid {
407 struct cache_head h;
408 kuid_t uid;
409 struct group_info *gi;
410 struct rcu_head rcu;
411};
412
413static int unix_gid_hash(kuid_t uid)
414{
415 return hash_long(from_kuid(&init_user_ns, uid), GID_HASHBITS);
416}
417
418static void unix_gid_put(struct kref *kref)
419{
420 struct cache_head *item = container_of(kref, struct cache_head, ref);
421 struct unix_gid *ug = container_of(item, struct unix_gid, h);
422 if (test_bit(CACHE_VALID, &item->flags) &&
423 !test_bit(CACHE_NEGATIVE, &item->flags))
424 put_group_info(ug->gi);
425 kfree_rcu(ug, rcu);
426}
427
428static int unix_gid_match(struct cache_head *corig, struct cache_head *cnew)
429{
430 struct unix_gid *orig = container_of(corig, struct unix_gid, h);
431 struct unix_gid *new = container_of(cnew, struct unix_gid, h);
432 return uid_eq(orig->uid, new->uid);
433}
434static void unix_gid_init(struct cache_head *cnew, struct cache_head *citem)
435{
436 struct unix_gid *new = container_of(cnew, struct unix_gid, h);
437 struct unix_gid *item = container_of(citem, struct unix_gid, h);
438 new->uid = item->uid;
439}
440static void unix_gid_update(struct cache_head *cnew, struct cache_head *citem)
441{
442 struct unix_gid *new = container_of(cnew, struct unix_gid, h);
443 struct unix_gid *item = container_of(citem, struct unix_gid, h);
444
445 get_group_info(item->gi);
446 new->gi = item->gi;
447}
448static struct cache_head *unix_gid_alloc(void)
449{
450 struct unix_gid *g = kmalloc(sizeof(*g), GFP_KERNEL);
451 if (g)
452 return &g->h;
453 else
454 return NULL;
455}
456
457static int unix_gid_upcall(struct cache_detail *cd, struct cache_head *h)
458{
459 return sunrpc_cache_pipe_upcall_timeout(cd, h);
460}
461
462static void unix_gid_request(struct cache_detail *cd,
463 struct cache_head *h,
464 char **bpp, int *blen)
465{
466 char tuid[20];
467 struct unix_gid *ug = container_of(h, struct unix_gid, h);
468
469 snprintf(tuid, 20, "%u", from_kuid(&init_user_ns, ug->uid));
470 qword_add(bpp, blen, tuid);
471 (*bpp)[-1] = '\n';
472}
473
474static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, kuid_t uid);
475
476static int unix_gid_parse(struct cache_detail *cd,
477 char *mesg, int mlen)
478{
479
480 int id;
481 kuid_t uid;
482 int gids;
483 int rv;
484 int i;
485 int err;
486 time64_t expiry;
487 struct unix_gid ug, *ugp;
488
489 if (mesg[mlen - 1] != '\n')
490 return -EINVAL;
491 mesg[mlen-1] = 0;
492
493 rv = get_int(&mesg, &id);
494 if (rv)
495 return -EINVAL;
496 uid = make_kuid(current_user_ns(), id);
497 ug.uid = uid;
498
499 expiry = get_expiry(&mesg);
500 if (expiry == 0)
501 return -EINVAL;
502
503 rv = get_int(&mesg, &gids);
504 if (rv || gids < 0 || gids > 8192)
505 return -EINVAL;
506
507 ug.gi = groups_alloc(gids);
508 if (!ug.gi)
509 return -ENOMEM;
510
511 for (i = 0 ; i < gids ; i++) {
512 int gid;
513 kgid_t kgid;
514 rv = get_int(&mesg, &gid);
515 err = -EINVAL;
516 if (rv)
517 goto out;
518 kgid = make_kgid(current_user_ns(), gid);
519 if (!gid_valid(kgid))
520 goto out;
521 ug.gi->gid[i] = kgid;
522 }
523
524 groups_sort(ug.gi);
525 ugp = unix_gid_lookup(cd, uid);
526 if (ugp) {
527 struct cache_head *ch;
528 ug.h.flags = 0;
529 ug.h.expiry_time = expiry;
530 ch = sunrpc_cache_update(cd,
531 &ug.h, &ugp->h,
532 unix_gid_hash(uid));
533 if (!ch)
534 err = -ENOMEM;
535 else {
536 err = 0;
537 cache_put(ch, cd);
538 }
539 } else
540 err = -ENOMEM;
541 out:
542 if (ug.gi)
543 put_group_info(ug.gi);
544 return err;
545}
546
547static int unix_gid_show(struct seq_file *m,
548 struct cache_detail *cd,
549 struct cache_head *h)
550{
551 struct user_namespace *user_ns = m->file->f_cred->user_ns;
552 struct unix_gid *ug;
553 int i;
554 int glen;
555
556 if (h == NULL) {
557 seq_puts(m, "#uid cnt: gids...\n");
558 return 0;
559 }
560 ug = container_of(h, struct unix_gid, h);
561 if (test_bit(CACHE_VALID, &h->flags) &&
562 !test_bit(CACHE_NEGATIVE, &h->flags))
563 glen = ug->gi->ngroups;
564 else
565 glen = 0;
566
567 seq_printf(m, "%u %d:", from_kuid_munged(user_ns, ug->uid), glen);
568 for (i = 0; i < glen; i++)
569 seq_printf(m, " %d", from_kgid_munged(user_ns, ug->gi->gid[i]));
570 seq_printf(m, "\n");
571 return 0;
572}
573
574static const struct cache_detail unix_gid_cache_template = {
575 .owner = THIS_MODULE,
576 .hash_size = GID_HASHMAX,
577 .name = "auth.unix.gid",
578 .cache_put = unix_gid_put,
579 .cache_upcall = unix_gid_upcall,
580 .cache_request = unix_gid_request,
581 .cache_parse = unix_gid_parse,
582 .cache_show = unix_gid_show,
583 .match = unix_gid_match,
584 .init = unix_gid_init,
585 .update = unix_gid_update,
586 .alloc = unix_gid_alloc,
587};
588
589int unix_gid_cache_create(struct net *net)
590{
591 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
592 struct cache_detail *cd;
593 int err;
594
595 cd = cache_create_net(&unix_gid_cache_template, net);
596 if (IS_ERR(cd))
597 return PTR_ERR(cd);
598 err = cache_register_net(cd, net);
599 if (err) {
600 cache_destroy_net(cd, net);
601 return err;
602 }
603 sn->unix_gid_cache = cd;
604 return 0;
605}
606
607void unix_gid_cache_destroy(struct net *net)
608{
609 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
610 struct cache_detail *cd = sn->unix_gid_cache;
611
612 sn->unix_gid_cache = NULL;
613 cache_purge(cd);
614 cache_unregister_net(cd, net);
615 cache_destroy_net(cd, net);
616}
617
618static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, kuid_t uid)
619{
620 struct unix_gid ug;
621 struct cache_head *ch;
622
623 ug.uid = uid;
624 ch = sunrpc_cache_lookup_rcu(cd, &ug.h, unix_gid_hash(uid));
625 if (ch)
626 return container_of(ch, struct unix_gid, h);
627 else
628 return NULL;
629}
630
631static struct group_info *unix_gid_find(kuid_t uid, struct svc_rqst *rqstp)
632{
633 struct unix_gid *ug;
634 struct group_info *gi;
635 int ret;
636 struct sunrpc_net *sn = net_generic(rqstp->rq_xprt->xpt_net,
637 sunrpc_net_id);
638
639 ug = unix_gid_lookup(sn->unix_gid_cache, uid);
640 if (!ug)
641 return ERR_PTR(-EAGAIN);
642 ret = cache_check(sn->unix_gid_cache, &ug->h, &rqstp->rq_chandle);
643 switch (ret) {
644 case -ENOENT:
645 return ERR_PTR(-ENOENT);
646 case -ETIMEDOUT:
647 return ERR_PTR(-ESHUTDOWN);
648 case 0:
649 gi = get_group_info(ug->gi);
650 cache_put(&ug->h, sn->unix_gid_cache);
651 return gi;
652 default:
653 return ERR_PTR(-EAGAIN);
654 }
655}
656
657int
658svcauth_unix_set_client(struct svc_rqst *rqstp)
659{
660 struct sockaddr_in *sin;
661 struct sockaddr_in6 *sin6, sin6_storage;
662 struct ip_map *ipm;
663 struct group_info *gi;
664 struct svc_cred *cred = &rqstp->rq_cred;
665 struct svc_xprt *xprt = rqstp->rq_xprt;
666 struct net *net = xprt->xpt_net;
667 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
668
669 switch (rqstp->rq_addr.ss_family) {
670 case AF_INET:
671 sin = svc_addr_in(rqstp);
672 sin6 = &sin6_storage;
673 ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &sin6->sin6_addr);
674 break;
675 case AF_INET6:
676 sin6 = svc_addr_in6(rqstp);
677 break;
678 default:
679 BUG();
680 }
681
682 rqstp->rq_client = NULL;
683 if (rqstp->rq_proc == 0)
684 goto out;
685
686 rqstp->rq_auth_stat = rpc_autherr_badcred;
687 ipm = ip_map_cached_get(xprt);
688 if (ipm == NULL)
689 ipm = __ip_map_lookup(sn->ip_map_cache, rqstp->rq_server->sv_program->pg_class,
690 &sin6->sin6_addr);
691
692 if (ipm == NULL)
693 return SVC_DENIED;
694
695 switch (cache_check(sn->ip_map_cache, &ipm->h, &rqstp->rq_chandle)) {
696 default:
697 BUG();
698 case -ETIMEDOUT:
699 return SVC_CLOSE;
700 case -EAGAIN:
701 return SVC_DROP;
702 case -ENOENT:
703 return SVC_DENIED;
704 case 0:
705 rqstp->rq_client = &ipm->m_client->h;
706 kref_get(&rqstp->rq_client->ref);
707 ip_map_cached_put(xprt, ipm);
708 break;
709 }
710
711 gi = unix_gid_find(cred->cr_uid, rqstp);
712 switch (PTR_ERR(gi)) {
713 case -EAGAIN:
714 return SVC_DROP;
715 case -ESHUTDOWN:
716 return SVC_CLOSE;
717 case -ENOENT:
718 break;
719 default:
720 put_group_info(cred->cr_group_info);
721 cred->cr_group_info = gi;
722 }
723
724out:
725 rqstp->rq_auth_stat = rpc_auth_ok;
726 return SVC_OK;
727}
728
729EXPORT_SYMBOL_GPL(svcauth_unix_set_client);
730
731static int
732svcauth_null_accept(struct svc_rqst *rqstp)
733{
734 struct kvec *argv = &rqstp->rq_arg.head[0];
735 struct kvec *resv = &rqstp->rq_res.head[0];
736 struct svc_cred *cred = &rqstp->rq_cred;
737
738 if (argv->iov_len < 3*4)
739 return SVC_GARBAGE;
740
741 if (svc_getu32(argv) != 0) {
742 dprintk("svc: bad null cred\n");
743 rqstp->rq_auth_stat = rpc_autherr_badcred;
744 return SVC_DENIED;
745 }
746 if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) {
747 dprintk("svc: bad null verf\n");
748 rqstp->rq_auth_stat = rpc_autherr_badverf;
749 return SVC_DENIED;
750 }
751
752
753 cred->cr_uid = INVALID_UID;
754 cred->cr_gid = INVALID_GID;
755 cred->cr_group_info = groups_alloc(0);
756 if (cred->cr_group_info == NULL)
757 return SVC_CLOSE;
758
759
760 svc_putnl(resv, RPC_AUTH_NULL);
761 svc_putnl(resv, 0);
762
763 rqstp->rq_cred.cr_flavor = RPC_AUTH_NULL;
764 return SVC_OK;
765}
766
767static int
768svcauth_null_release(struct svc_rqst *rqstp)
769{
770 if (rqstp->rq_client)
771 auth_domain_put(rqstp->rq_client);
772 rqstp->rq_client = NULL;
773 if (rqstp->rq_cred.cr_group_info)
774 put_group_info(rqstp->rq_cred.cr_group_info);
775 rqstp->rq_cred.cr_group_info = NULL;
776
777 return 0;
778}
779
780
781struct auth_ops svcauth_null = {
782 .name = "null",
783 .owner = THIS_MODULE,
784 .flavour = RPC_AUTH_NULL,
785 .accept = svcauth_null_accept,
786 .release = svcauth_null_release,
787 .set_client = svcauth_unix_set_client,
788};
789
790
791static int
792svcauth_unix_accept(struct svc_rqst *rqstp)
793{
794 struct kvec *argv = &rqstp->rq_arg.head[0];
795 struct kvec *resv = &rqstp->rq_res.head[0];
796 struct svc_cred *cred = &rqstp->rq_cred;
797 struct user_namespace *userns;
798 u32 slen, i;
799 int len = argv->iov_len;
800
801 if ((len -= 3*4) < 0)
802 return SVC_GARBAGE;
803
804 svc_getu32(argv);
805 svc_getu32(argv);
806 slen = XDR_QUADLEN(svc_getnl(argv));
807 if (slen > 64 || (len -= (slen + 3)*4) < 0)
808 goto badcred;
809 argv->iov_base = (void*)((__be32*)argv->iov_base + slen);
810 argv->iov_len -= slen*4;
811
812
813
814
815
816
817
818 userns = (rqstp->rq_xprt && rqstp->rq_xprt->xpt_cred) ?
819 rqstp->rq_xprt->xpt_cred->user_ns : &init_user_ns;
820 cred->cr_uid = make_kuid(userns, svc_getnl(argv));
821 cred->cr_gid = make_kgid(userns, svc_getnl(argv));
822 slen = svc_getnl(argv);
823 if (slen > UNX_NGROUPS || (len -= (slen + 2)*4) < 0)
824 goto badcred;
825 cred->cr_group_info = groups_alloc(slen);
826 if (cred->cr_group_info == NULL)
827 return SVC_CLOSE;
828 for (i = 0; i < slen; i++) {
829 kgid_t kgid = make_kgid(userns, svc_getnl(argv));
830 cred->cr_group_info->gid[i] = kgid;
831 }
832 groups_sort(cred->cr_group_info);
833 if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) {
834 rqstp->rq_auth_stat = rpc_autherr_badverf;
835 return SVC_DENIED;
836 }
837
838
839 svc_putnl(resv, RPC_AUTH_NULL);
840 svc_putnl(resv, 0);
841
842 rqstp->rq_cred.cr_flavor = RPC_AUTH_UNIX;
843 return SVC_OK;
844
845badcred:
846 rqstp->rq_auth_stat = rpc_autherr_badcred;
847 return SVC_DENIED;
848}
849
850static int
851svcauth_unix_release(struct svc_rqst *rqstp)
852{
853
854
855 if (rqstp->rq_client)
856 auth_domain_put(rqstp->rq_client);
857 rqstp->rq_client = NULL;
858 if (rqstp->rq_cred.cr_group_info)
859 put_group_info(rqstp->rq_cred.cr_group_info);
860 rqstp->rq_cred.cr_group_info = NULL;
861
862 return 0;
863}
864
865
866struct auth_ops svcauth_unix = {
867 .name = "unix",
868 .owner = THIS_MODULE,
869 .flavour = RPC_AUTH_UNIX,
870 .accept = svcauth_unix_accept,
871 .release = svcauth_unix_release,
872 .domain_release = svcauth_unix_domain_release,
873 .set_client = svcauth_unix_set_client,
874};
875
876static const struct cache_detail ip_map_cache_template = {
877 .owner = THIS_MODULE,
878 .hash_size = IP_HASHMAX,
879 .name = "auth.unix.ip",
880 .cache_put = ip_map_put,
881 .cache_upcall = ip_map_upcall,
882 .cache_request = ip_map_request,
883 .cache_parse = ip_map_parse,
884 .cache_show = ip_map_show,
885 .match = ip_map_match,
886 .init = ip_map_init,
887 .update = update,
888 .alloc = ip_map_alloc,
889};
890
891int ip_map_cache_create(struct net *net)
892{
893 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
894 struct cache_detail *cd;
895 int err;
896
897 cd = cache_create_net(&ip_map_cache_template, net);
898 if (IS_ERR(cd))
899 return PTR_ERR(cd);
900 err = cache_register_net(cd, net);
901 if (err) {
902 cache_destroy_net(cd, net);
903 return err;
904 }
905 sn->ip_map_cache = cd;
906 return 0;
907}
908
909void ip_map_cache_destroy(struct net *net)
910{
911 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
912 struct cache_detail *cd = sn->ip_map_cache;
913
914 sn->ip_map_cache = NULL;
915 cache_purge(cd);
916 cache_unregister_net(cd, net);
917 cache_destroy_net(cd, net);
918}
919
