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 inline struct ip_map *ip_map_lookup(struct net *net, char *class,
307 struct in6_addr *addr)
308{
309 struct sunrpc_net *sn;
310
311 sn = net_generic(net, sunrpc_net_id);
312 return __ip_map_lookup(sn->ip_map_cache, class, addr);
313}
314
315static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm,
316 struct unix_domain *udom, time64_t expiry)
317{
318 struct ip_map ip;
319 struct cache_head *ch;
320
321 ip.m_client = udom;
322 ip.h.flags = 0;
323 if (!udom)
324 set_bit(CACHE_NEGATIVE, &ip.h.flags);
325 ip.h.expiry_time = expiry;
326 ch = sunrpc_cache_update(cd, &ip.h, &ipm->h,
327 hash_str(ipm->m_class, IP_HASHBITS) ^
328 hash_ip6(&ipm->m_addr));
329 if (!ch)
330 return -ENOMEM;
331 cache_put(ch, cd);
332 return 0;
333}
334
335static inline int ip_map_update(struct net *net, struct ip_map *ipm,
336 struct unix_domain *udom, time64_t expiry)
337{
338 struct sunrpc_net *sn;
339
340 sn = net_generic(net, sunrpc_net_id);
341 return __ip_map_update(sn->ip_map_cache, ipm, udom, expiry);
342}
343
344void svcauth_unix_purge(struct net *net)
345{
346 struct sunrpc_net *sn;
347
348 sn = net_generic(net, sunrpc_net_id);
349 cache_purge(sn->ip_map_cache);
350}
351EXPORT_SYMBOL_GPL(svcauth_unix_purge);
352
353static inline struct ip_map *
354ip_map_cached_get(struct svc_xprt *xprt)
355{
356 struct ip_map *ipm = NULL;
357 struct sunrpc_net *sn;
358
359 if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) {
360 spin_lock(&xprt->xpt_lock);
361 ipm = xprt->xpt_auth_cache;
362 if (ipm != NULL) {
363 sn = net_generic(xprt->xpt_net, sunrpc_net_id);
364 if (cache_is_expired(sn->ip_map_cache, &ipm->h)) {
365
366
367
368
369
370 xprt->xpt_auth_cache = NULL;
371 spin_unlock(&xprt->xpt_lock);
372 cache_put(&ipm->h, sn->ip_map_cache);
373 return NULL;
374 }
375 cache_get(&ipm->h);
376 }
377 spin_unlock(&xprt->xpt_lock);
378 }
379 return ipm;
380}
381
382static inline void
383ip_map_cached_put(struct svc_xprt *xprt, struct ip_map *ipm)
384{
385 if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) {
386 spin_lock(&xprt->xpt_lock);
387 if (xprt->xpt_auth_cache == NULL) {
388
389 xprt->xpt_auth_cache = ipm;
390 ipm = NULL;
391 }
392 spin_unlock(&xprt->xpt_lock);
393 }
394 if (ipm) {
395 struct sunrpc_net *sn;
396
397 sn = net_generic(xprt->xpt_net, sunrpc_net_id);
398 cache_put(&ipm->h, sn->ip_map_cache);
399 }
400}
401
402void
403svcauth_unix_info_release(struct svc_xprt *xpt)
404{
405 struct ip_map *ipm;
406
407 ipm = xpt->xpt_auth_cache;
408 if (ipm != NULL) {
409 struct sunrpc_net *sn;
410
411 sn = net_generic(xpt->xpt_net, sunrpc_net_id);
412 cache_put(&ipm->h, sn->ip_map_cache);
413 }
414}
415
416
417
418
419
420
421#define GID_HASHBITS 8
422#define GID_HASHMAX (1<<GID_HASHBITS)
423
424struct unix_gid {
425 struct cache_head h;
426 kuid_t uid;
427 struct group_info *gi;
428 struct rcu_head rcu;
429};
430
431static int unix_gid_hash(kuid_t uid)
432{
433 return hash_long(from_kuid(&init_user_ns, uid), GID_HASHBITS);
434}
435
436static void unix_gid_put(struct kref *kref)
437{
438 struct cache_head *item = container_of(kref, struct cache_head, ref);
439 struct unix_gid *ug = container_of(item, struct unix_gid, h);
440 if (test_bit(CACHE_VALID, &item->flags) &&
441 !test_bit(CACHE_NEGATIVE, &item->flags))
442 put_group_info(ug->gi);
443 kfree_rcu(ug, rcu);
444}
445
446static int unix_gid_match(struct cache_head *corig, struct cache_head *cnew)
447{
448 struct unix_gid *orig = container_of(corig, struct unix_gid, h);
449 struct unix_gid *new = container_of(cnew, struct unix_gid, h);
450 return uid_eq(orig->uid, new->uid);
451}
452static void unix_gid_init(struct cache_head *cnew, struct cache_head *citem)
453{
454 struct unix_gid *new = container_of(cnew, struct unix_gid, h);
455 struct unix_gid *item = container_of(citem, struct unix_gid, h);
456 new->uid = item->uid;
457}
458static void unix_gid_update(struct cache_head *cnew, struct cache_head *citem)
459{
460 struct unix_gid *new = container_of(cnew, struct unix_gid, h);
461 struct unix_gid *item = container_of(citem, struct unix_gid, h);
462
463 get_group_info(item->gi);
464 new->gi = item->gi;
465}
466static struct cache_head *unix_gid_alloc(void)
467{
468 struct unix_gid *g = kmalloc(sizeof(*g), GFP_KERNEL);
469 if (g)
470 return &g->h;
471 else
472 return NULL;
473}
474
475static int unix_gid_upcall(struct cache_detail *cd, struct cache_head *h)
476{
477 return sunrpc_cache_pipe_upcall_timeout(cd, h);
478}
479
480static void unix_gid_request(struct cache_detail *cd,
481 struct cache_head *h,
482 char **bpp, int *blen)
483{
484 char tuid[20];
485 struct unix_gid *ug = container_of(h, struct unix_gid, h);
486
487 snprintf(tuid, 20, "%u", from_kuid(&init_user_ns, ug->uid));
488 qword_add(bpp, blen, tuid);
489 (*bpp)[-1] = '\n';
490}
491
492static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, kuid_t uid);
493
494static int unix_gid_parse(struct cache_detail *cd,
495 char *mesg, int mlen)
496{
497
498 int id;
499 kuid_t uid;
500 int gids;
501 int rv;
502 int i;
503 int err;
504 time64_t expiry;
505 struct unix_gid ug, *ugp;
506
507 if (mesg[mlen - 1] != '\n')
508 return -EINVAL;
509 mesg[mlen-1] = 0;
510
511 rv = get_int(&mesg, &id);
512 if (rv)
513 return -EINVAL;
514 uid = make_kuid(current_user_ns(), id);
515 ug.uid = uid;
516
517 expiry = get_expiry(&mesg);
518 if (expiry == 0)
519 return -EINVAL;
520
521 rv = get_int(&mesg, &gids);
522 if (rv || gids < 0 || gids > 8192)
523 return -EINVAL;
524
525 ug.gi = groups_alloc(gids);
526 if (!ug.gi)
527 return -ENOMEM;
528
529 for (i = 0 ; i < gids ; i++) {
530 int gid;
531 kgid_t kgid;
532 rv = get_int(&mesg, &gid);
533 err = -EINVAL;
534 if (rv)
535 goto out;
536 kgid = make_kgid(current_user_ns(), gid);
537 if (!gid_valid(kgid))
538 goto out;
539 ug.gi->gid[i] = kgid;
540 }
541
542 groups_sort(ug.gi);
543 ugp = unix_gid_lookup(cd, uid);
544 if (ugp) {
545 struct cache_head *ch;
546 ug.h.flags = 0;
547 ug.h.expiry_time = expiry;
548 ch = sunrpc_cache_update(cd,
549 &ug.h, &ugp->h,
550 unix_gid_hash(uid));
551 if (!ch)
552 err = -ENOMEM;
553 else {
554 err = 0;
555 cache_put(ch, cd);
556 }
557 } else
558 err = -ENOMEM;
559 out:
560 if (ug.gi)
561 put_group_info(ug.gi);
562 return err;
563}
564
565static int unix_gid_show(struct seq_file *m,
566 struct cache_detail *cd,
567 struct cache_head *h)
568{
569 struct user_namespace *user_ns = m->file->f_cred->user_ns;
570 struct unix_gid *ug;
571 int i;
572 int glen;
573
574 if (h == NULL) {
575 seq_puts(m, "#uid cnt: gids...\n");
576 return 0;
577 }
578 ug = container_of(h, struct unix_gid, h);
579 if (test_bit(CACHE_VALID, &h->flags) &&
580 !test_bit(CACHE_NEGATIVE, &h->flags))
581 glen = ug->gi->ngroups;
582 else
583 glen = 0;
584
585 seq_printf(m, "%u %d:", from_kuid_munged(user_ns, ug->uid), glen);
586 for (i = 0; i < glen; i++)
587 seq_printf(m, " %d", from_kgid_munged(user_ns, ug->gi->gid[i]));
588 seq_printf(m, "\n");
589 return 0;
590}
591
592static const struct cache_detail unix_gid_cache_template = {
593 .owner = THIS_MODULE,
594 .hash_size = GID_HASHMAX,
595 .name = "auth.unix.gid",
596 .cache_put = unix_gid_put,
597 .cache_upcall = unix_gid_upcall,
598 .cache_request = unix_gid_request,
599 .cache_parse = unix_gid_parse,
600 .cache_show = unix_gid_show,
601 .match = unix_gid_match,
602 .init = unix_gid_init,
603 .update = unix_gid_update,
604 .alloc = unix_gid_alloc,
605};
606
607int unix_gid_cache_create(struct net *net)
608{
609 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
610 struct cache_detail *cd;
611 int err;
612
613 cd = cache_create_net(&unix_gid_cache_template, net);
614 if (IS_ERR(cd))
615 return PTR_ERR(cd);
616 err = cache_register_net(cd, net);
617 if (err) {
618 cache_destroy_net(cd, net);
619 return err;
620 }
621 sn->unix_gid_cache = cd;
622 return 0;
623}
624
625void unix_gid_cache_destroy(struct net *net)
626{
627 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
628 struct cache_detail *cd = sn->unix_gid_cache;
629
630 sn->unix_gid_cache = NULL;
631 cache_purge(cd);
632 cache_unregister_net(cd, net);
633 cache_destroy_net(cd, net);
634}
635
636static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, kuid_t uid)
637{
638 struct unix_gid ug;
639 struct cache_head *ch;
640
641 ug.uid = uid;
642 ch = sunrpc_cache_lookup_rcu(cd, &ug.h, unix_gid_hash(uid));
643 if (ch)
644 return container_of(ch, struct unix_gid, h);
645 else
646 return NULL;
647}
648
649static struct group_info *unix_gid_find(kuid_t uid, struct svc_rqst *rqstp)
650{
651 struct unix_gid *ug;
652 struct group_info *gi;
653 int ret;
654 struct sunrpc_net *sn = net_generic(rqstp->rq_xprt->xpt_net,
655 sunrpc_net_id);
656
657 ug = unix_gid_lookup(sn->unix_gid_cache, uid);
658 if (!ug)
659 return ERR_PTR(-EAGAIN);
660 ret = cache_check(sn->unix_gid_cache, &ug->h, &rqstp->rq_chandle);
661 switch (ret) {
662 case -ENOENT:
663 return ERR_PTR(-ENOENT);
664 case -ETIMEDOUT:
665 return ERR_PTR(-ESHUTDOWN);
666 case 0:
667 gi = get_group_info(ug->gi);
668 cache_put(&ug->h, sn->unix_gid_cache);
669 return gi;
670 default:
671 return ERR_PTR(-EAGAIN);
672 }
673}
674
675int
676svcauth_unix_set_client(struct svc_rqst *rqstp)
677{
678 struct sockaddr_in *sin;
679 struct sockaddr_in6 *sin6, sin6_storage;
680 struct ip_map *ipm;
681 struct group_info *gi;
682 struct svc_cred *cred = &rqstp->rq_cred;
683 struct svc_xprt *xprt = rqstp->rq_xprt;
684 struct net *net = xprt->xpt_net;
685 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
686
687 switch (rqstp->rq_addr.ss_family) {
688 case AF_INET:
689 sin = svc_addr_in(rqstp);
690 sin6 = &sin6_storage;
691 ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &sin6->sin6_addr);
692 break;
693 case AF_INET6:
694 sin6 = svc_addr_in6(rqstp);
695 break;
696 default:
697 BUG();
698 }
699
700 rqstp->rq_client = NULL;
701 if (rqstp->rq_proc == 0)
702 return SVC_OK;
703
704 ipm = ip_map_cached_get(xprt);
705 if (ipm == NULL)
706 ipm = __ip_map_lookup(sn->ip_map_cache, rqstp->rq_server->sv_program->pg_class,
707 &sin6->sin6_addr);
708
709 if (ipm == NULL)
710 return SVC_DENIED;
711
712 switch (cache_check(sn->ip_map_cache, &ipm->h, &rqstp->rq_chandle)) {
713 default:
714 BUG();
715 case -ETIMEDOUT:
716 return SVC_CLOSE;
717 case -EAGAIN:
718 return SVC_DROP;
719 case -ENOENT:
720 return SVC_DENIED;
721 case 0:
722 rqstp->rq_client = &ipm->m_client->h;
723 kref_get(&rqstp->rq_client->ref);
724 ip_map_cached_put(xprt, ipm);
725 break;
726 }
727
728 gi = unix_gid_find(cred->cr_uid, rqstp);
729 switch (PTR_ERR(gi)) {
730 case -EAGAIN:
731 return SVC_DROP;
732 case -ESHUTDOWN:
733 return SVC_CLOSE;
734 case -ENOENT:
735 break;
736 default:
737 put_group_info(cred->cr_group_info);
738 cred->cr_group_info = gi;
739 }
740 return SVC_OK;
741}
742
743EXPORT_SYMBOL_GPL(svcauth_unix_set_client);
744
745static int
746svcauth_null_accept(struct svc_rqst *rqstp, __be32 *authp)
747{
748 struct kvec *argv = &rqstp->rq_arg.head[0];
749 struct kvec *resv = &rqstp->rq_res.head[0];
750 struct svc_cred *cred = &rqstp->rq_cred;
751
752 if (argv->iov_len < 3*4)
753 return SVC_GARBAGE;
754
755 if (svc_getu32(argv) != 0) {
756 dprintk("svc: bad null cred\n");
757 *authp = rpc_autherr_badcred;
758 return SVC_DENIED;
759 }
760 if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) {
761 dprintk("svc: bad null verf\n");
762 *authp = rpc_autherr_badverf;
763 return SVC_DENIED;
764 }
765
766
767 cred->cr_uid = INVALID_UID;
768 cred->cr_gid = INVALID_GID;
769 cred->cr_group_info = groups_alloc(0);
770 if (cred->cr_group_info == NULL)
771 return SVC_CLOSE;
772
773
774 svc_putnl(resv, RPC_AUTH_NULL);
775 svc_putnl(resv, 0);
776
777 rqstp->rq_cred.cr_flavor = RPC_AUTH_NULL;
778 return SVC_OK;
779}
780
781static int
782svcauth_null_release(struct svc_rqst *rqstp)
783{
784 if (rqstp->rq_client)
785 auth_domain_put(rqstp->rq_client);
786 rqstp->rq_client = NULL;
787 if (rqstp->rq_cred.cr_group_info)
788 put_group_info(rqstp->rq_cred.cr_group_info);
789 rqstp->rq_cred.cr_group_info = NULL;
790
791 return 0;
792}
793
794
795struct auth_ops svcauth_null = {
796 .name = "null",
797 .owner = THIS_MODULE,
798 .flavour = RPC_AUTH_NULL,
799 .accept = svcauth_null_accept,
800 .release = svcauth_null_release,
801 .set_client = svcauth_unix_set_client,
802};
803
804
805static int
806svcauth_unix_accept(struct svc_rqst *rqstp, __be32 *authp)
807{
808 struct kvec *argv = &rqstp->rq_arg.head[0];
809 struct kvec *resv = &rqstp->rq_res.head[0];
810 struct svc_cred *cred = &rqstp->rq_cred;
811 struct user_namespace *userns;
812 u32 slen, i;
813 int len = argv->iov_len;
814
815 if ((len -= 3*4) < 0)
816 return SVC_GARBAGE;
817
818 svc_getu32(argv);
819 svc_getu32(argv);
820 slen = XDR_QUADLEN(svc_getnl(argv));
821 if (slen > 64 || (len -= (slen + 3)*4) < 0)
822 goto badcred;
823 argv->iov_base = (void*)((__be32*)argv->iov_base + slen);
824 argv->iov_len -= slen*4;
825
826
827
828
829
830
831
832 userns = (rqstp->rq_xprt && rqstp->rq_xprt->xpt_cred) ?
833 rqstp->rq_xprt->xpt_cred->user_ns : &init_user_ns;
834 cred->cr_uid = make_kuid(userns, svc_getnl(argv));
835 cred->cr_gid = make_kgid(userns, svc_getnl(argv));
836 slen = svc_getnl(argv);
837 if (slen > UNX_NGROUPS || (len -= (slen + 2)*4) < 0)
838 goto badcred;
839 cred->cr_group_info = groups_alloc(slen);
840 if (cred->cr_group_info == NULL)
841 return SVC_CLOSE;
842 for (i = 0; i < slen; i++) {
843 kgid_t kgid = make_kgid(userns, svc_getnl(argv));
844 cred->cr_group_info->gid[i] = kgid;
845 }
846 groups_sort(cred->cr_group_info);
847 if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) {
848 *authp = rpc_autherr_badverf;
849 return SVC_DENIED;
850 }
851
852
853 svc_putnl(resv, RPC_AUTH_NULL);
854 svc_putnl(resv, 0);
855
856 rqstp->rq_cred.cr_flavor = RPC_AUTH_UNIX;
857 return SVC_OK;
858
859badcred:
860 *authp = rpc_autherr_badcred;
861 return SVC_DENIED;
862}
863
864static int
865svcauth_unix_release(struct svc_rqst *rqstp)
866{
867
868
869 if (rqstp->rq_client)
870 auth_domain_put(rqstp->rq_client);
871 rqstp->rq_client = NULL;
872 if (rqstp->rq_cred.cr_group_info)
873 put_group_info(rqstp->rq_cred.cr_group_info);
874 rqstp->rq_cred.cr_group_info = NULL;
875
876 return 0;
877}
878
879
880struct auth_ops svcauth_unix = {
881 .name = "unix",
882 .owner = THIS_MODULE,
883 .flavour = RPC_AUTH_UNIX,
884 .accept = svcauth_unix_accept,
885 .release = svcauth_unix_release,
886 .domain_release = svcauth_unix_domain_release,
887 .set_client = svcauth_unix_set_client,
888};
889
890static const struct cache_detail ip_map_cache_template = {
891 .owner = THIS_MODULE,
892 .hash_size = IP_HASHMAX,
893 .name = "auth.unix.ip",
894 .cache_put = ip_map_put,
895 .cache_upcall = ip_map_upcall,
896 .cache_request = ip_map_request,
897 .cache_parse = ip_map_parse,
898 .cache_show = ip_map_show,
899 .match = ip_map_match,
900 .init = ip_map_init,
901 .update = update,
902 .alloc = ip_map_alloc,
903};
904
905int ip_map_cache_create(struct net *net)
906{
907 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
908 struct cache_detail *cd;
909 int err;
910
911 cd = cache_create_net(&ip_map_cache_template, net);
912 if (IS_ERR(cd))
913 return PTR_ERR(cd);
914 err = cache_register_net(cd, net);
915 if (err) {
916 cache_destroy_net(cd, net);
917 return err;
918 }
919 sn->ip_map_cache = cd;
920 return 0;
921}
922
923void ip_map_cache_destroy(struct net *net)
924{
925 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
926 struct cache_detail *cd = sn->ip_map_cache;
927
928 sn->ip_map_cache = NULL;
929 cache_purge(cd);
930 cache_unregister_net(cd, net);
931 cache_destroy_net(cd, net);
932}
933
