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14#include <linux/module.h>
15#include <linux/init.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/sched.h>
19#include <linux/pagemap.h>
20#include <linux/sunrpc/clnt.h>
21#include <linux/sunrpc/auth.h>
22#include <linux/sunrpc/auth_gss.h>
23#include <linux/sunrpc/gss_krb5.h>
24#include <linux/sunrpc/svcauth_gss.h>
25#include <linux/sunrpc/gss_err.h>
26#include <linux/workqueue.h>
27#include <linux/sunrpc/rpc_pipe_fs.h>
28#include <linux/sunrpc/gss_api.h>
29#include <linux/uaccess.h>
30#include <linux/hashtable.h>
31
32#include "auth_gss_internal.h"
33#include "../netns.h"
34
35#include <trace/events/rpcgss.h>
36
37static const struct rpc_authops authgss_ops;
38
39static const struct rpc_credops gss_credops;
40static const struct rpc_credops gss_nullops;
41
42#define GSS_RETRY_EXPIRED 5
43static unsigned int gss_expired_cred_retry_delay = GSS_RETRY_EXPIRED;
44
45#define GSS_KEY_EXPIRE_TIMEO 240
46static unsigned int gss_key_expire_timeo = GSS_KEY_EXPIRE_TIMEO;
47
48#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
49# define RPCDBG_FACILITY RPCDBG_AUTH
50#endif
51
52#define GSS_CRED_SLACK (RPC_MAX_AUTH_SIZE * 2)
53
54
55#define GSS_VERF_SLACK 100
56
57static DEFINE_HASHTABLE(gss_auth_hash_table, 4);
58static DEFINE_SPINLOCK(gss_auth_hash_lock);
59
60struct gss_pipe {
61 struct rpc_pipe_dir_object pdo;
62 struct rpc_pipe *pipe;
63 struct rpc_clnt *clnt;
64 const char *name;
65 struct kref kref;
66};
67
68struct gss_auth {
69 struct kref kref;
70 struct hlist_node hash;
71 struct rpc_auth rpc_auth;
72 struct gss_api_mech *mech;
73 enum rpc_gss_svc service;
74 struct rpc_clnt *client;
75 struct net *net;
76
77
78
79
80
81
82 struct gss_pipe *gss_pipe[2];
83 const char *target_name;
84};
85
86
87static DEFINE_SPINLOCK(pipe_version_lock);
88static struct rpc_wait_queue pipe_version_rpc_waitqueue;
89static DECLARE_WAIT_QUEUE_HEAD(pipe_version_waitqueue);
90static void gss_put_auth(struct gss_auth *gss_auth);
91
92static void gss_free_ctx(struct gss_cl_ctx *);
93static const struct rpc_pipe_ops gss_upcall_ops_v0;
94static const struct rpc_pipe_ops gss_upcall_ops_v1;
95
96static inline struct gss_cl_ctx *
97gss_get_ctx(struct gss_cl_ctx *ctx)
98{
99 refcount_inc(&ctx->count);
100 return ctx;
101}
102
103static inline void
104gss_put_ctx(struct gss_cl_ctx *ctx)
105{
106 if (refcount_dec_and_test(&ctx->count))
107 gss_free_ctx(ctx);
108}
109
110
111
112
113
114
115static void
116gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx)
117{
118 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
119
120 if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags))
121 return;
122 gss_get_ctx(ctx);
123 rcu_assign_pointer(gss_cred->gc_ctx, ctx);
124 set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
125 smp_mb__before_atomic();
126 clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags);
127}
128
129static struct gss_cl_ctx *
130gss_cred_get_ctx(struct rpc_cred *cred)
131{
132 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
133 struct gss_cl_ctx *ctx = NULL;
134
135 rcu_read_lock();
136 ctx = rcu_dereference(gss_cred->gc_ctx);
137 if (ctx)
138 gss_get_ctx(ctx);
139 rcu_read_unlock();
140 return ctx;
141}
142
143static struct gss_cl_ctx *
144gss_alloc_context(void)
145{
146 struct gss_cl_ctx *ctx;
147
148 ctx = kzalloc(sizeof(*ctx), GFP_NOFS);
149 if (ctx != NULL) {
150 ctx->gc_proc = RPC_GSS_PROC_DATA;
151 ctx->gc_seq = 1;
152 spin_lock_init(&ctx->gc_seq_lock);
153 refcount_set(&ctx->count,1);
154 }
155 return ctx;
156}
157
158#define GSSD_MIN_TIMEOUT (60 * 60)
159static const void *
160gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm)
161{
162 const void *q;
163 unsigned int seclen;
164 unsigned int timeout;
165 unsigned long now = jiffies;
166 u32 window_size;
167 int ret;
168
169
170
171
172
173 p = simple_get_bytes(p, end, &timeout, sizeof(timeout));
174 if (IS_ERR(p))
175 goto err;
176 if (timeout == 0)
177 timeout = GSSD_MIN_TIMEOUT;
178 ctx->gc_expiry = now + ((unsigned long)timeout * HZ);
179
180
181
182 p = simple_get_bytes(p, end, &window_size, sizeof(window_size));
183 if (IS_ERR(p))
184 goto err;
185 ctx->gc_win = window_size;
186
187 if (ctx->gc_win == 0) {
188
189
190
191
192 p = simple_get_bytes(p, end, &ret, sizeof(ret));
193 if (!IS_ERR(p))
194 p = (ret == -EKEYEXPIRED) ? ERR_PTR(-EKEYEXPIRED) :
195 ERR_PTR(-EACCES);
196 goto err;
197 }
198
199 p = simple_get_netobj(p, end, &ctx->gc_wire_ctx);
200 if (IS_ERR(p))
201 goto err;
202
203 p = simple_get_bytes(p, end, &seclen, sizeof(seclen));
204 if (IS_ERR(p))
205 goto err;
206 q = (const void *)((const char *)p + seclen);
207 if (unlikely(q > end || q < p)) {
208 p = ERR_PTR(-EFAULT);
209 goto err;
210 }
211 ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx, NULL, GFP_NOFS);
212 if (ret < 0) {
213 trace_rpcgss_import_ctx(ret);
214 p = ERR_PTR(ret);
215 goto err;
216 }
217
218
219 if (q == end) {
220 p = q;
221 goto done;
222 }
223
224
225 p = simple_get_netobj(q, end, &ctx->gc_acceptor);
226 if (IS_ERR(p))
227 goto err;
228done:
229 trace_rpcgss_context(window_size, ctx->gc_expiry, now, timeout,
230 ctx->gc_acceptor.len, ctx->gc_acceptor.data);
231err:
232 return p;
233}
234
235
236
237
238
239
240#define UPCALL_BUF_LEN 256
241
242struct gss_upcall_msg {
243 refcount_t count;
244 kuid_t uid;
245 const char *service_name;
246 struct rpc_pipe_msg msg;
247 struct list_head list;
248 struct gss_auth *auth;
249 struct rpc_pipe *pipe;
250 struct rpc_wait_queue rpc_waitqueue;
251 wait_queue_head_t waitqueue;
252 struct gss_cl_ctx *ctx;
253 char databuf[UPCALL_BUF_LEN];
254};
255
256static int get_pipe_version(struct net *net)
257{
258 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
259 int ret;
260
261 spin_lock(&pipe_version_lock);
262 if (sn->pipe_version >= 0) {
263 atomic_inc(&sn->pipe_users);
264 ret = sn->pipe_version;
265 } else
266 ret = -EAGAIN;
267 spin_unlock(&pipe_version_lock);
268 return ret;
269}
270
271static void put_pipe_version(struct net *net)
272{
273 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
274
275 if (atomic_dec_and_lock(&sn->pipe_users, &pipe_version_lock)) {
276 sn->pipe_version = -1;
277 spin_unlock(&pipe_version_lock);
278 }
279}
280
281static void
282gss_release_msg(struct gss_upcall_msg *gss_msg)
283{
284 struct net *net = gss_msg->auth->net;
285 if (!refcount_dec_and_test(&gss_msg->count))
286 return;
287 put_pipe_version(net);
288 BUG_ON(!list_empty(&gss_msg->list));
289 if (gss_msg->ctx != NULL)
290 gss_put_ctx(gss_msg->ctx);
291 rpc_destroy_wait_queue(&gss_msg->rpc_waitqueue);
292 gss_put_auth(gss_msg->auth);
293 kfree_const(gss_msg->service_name);
294 kfree(gss_msg);
295}
296
297static struct gss_upcall_msg *
298__gss_find_upcall(struct rpc_pipe *pipe, kuid_t uid, const struct gss_auth *auth)
299{
300 struct gss_upcall_msg *pos;
301 list_for_each_entry(pos, &pipe->in_downcall, list) {
302 if (!uid_eq(pos->uid, uid))
303 continue;
304 if (auth && pos->auth->service != auth->service)
305 continue;
306 refcount_inc(&pos->count);
307 return pos;
308 }
309 return NULL;
310}
311
312
313
314
315
316static inline struct gss_upcall_msg *
317gss_add_msg(struct gss_upcall_msg *gss_msg)
318{
319 struct rpc_pipe *pipe = gss_msg->pipe;
320 struct gss_upcall_msg *old;
321
322 spin_lock(&pipe->lock);
323 old = __gss_find_upcall(pipe, gss_msg->uid, gss_msg->auth);
324 if (old == NULL) {
325 refcount_inc(&gss_msg->count);
326 list_add(&gss_msg->list, &pipe->in_downcall);
327 } else
328 gss_msg = old;
329 spin_unlock(&pipe->lock);
330 return gss_msg;
331}
332
333static void
334__gss_unhash_msg(struct gss_upcall_msg *gss_msg)
335{
336 list_del_init(&gss_msg->list);
337 rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno);
338 wake_up_all(&gss_msg->waitqueue);
339 refcount_dec(&gss_msg->count);
340}
341
342static void
343gss_unhash_msg(struct gss_upcall_msg *gss_msg)
344{
345 struct rpc_pipe *pipe = gss_msg->pipe;
346
347 if (list_empty(&gss_msg->list))
348 return;
349 spin_lock(&pipe->lock);
350 if (!list_empty(&gss_msg->list))
351 __gss_unhash_msg(gss_msg);
352 spin_unlock(&pipe->lock);
353}
354
355static void
356gss_handle_downcall_result(struct gss_cred *gss_cred, struct gss_upcall_msg *gss_msg)
357{
358 switch (gss_msg->msg.errno) {
359 case 0:
360 if (gss_msg->ctx == NULL)
361 break;
362 clear_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags);
363 gss_cred_set_ctx(&gss_cred->gc_base, gss_msg->ctx);
364 break;
365 case -EKEYEXPIRED:
366 set_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags);
367 }
368 gss_cred->gc_upcall_timestamp = jiffies;
369 gss_cred->gc_upcall = NULL;
370 rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno);
371}
372
373static void
374gss_upcall_callback(struct rpc_task *task)
375{
376 struct gss_cred *gss_cred = container_of(task->tk_rqstp->rq_cred,
377 struct gss_cred, gc_base);
378 struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall;
379 struct rpc_pipe *pipe = gss_msg->pipe;
380
381 spin_lock(&pipe->lock);
382 gss_handle_downcall_result(gss_cred, gss_msg);
383 spin_unlock(&pipe->lock);
384 task->tk_status = gss_msg->msg.errno;
385 gss_release_msg(gss_msg);
386}
387
388static void gss_encode_v0_msg(struct gss_upcall_msg *gss_msg,
389 const struct cred *cred)
390{
391 struct user_namespace *userns = cred->user_ns;
392
393 uid_t uid = from_kuid_munged(userns, gss_msg->uid);
394 memcpy(gss_msg->databuf, &uid, sizeof(uid));
395 gss_msg->msg.data = gss_msg->databuf;
396 gss_msg->msg.len = sizeof(uid);
397
398 BUILD_BUG_ON(sizeof(uid) > sizeof(gss_msg->databuf));
399}
400
401static ssize_t
402gss_v0_upcall(struct file *file, struct rpc_pipe_msg *msg,
403 char __user *buf, size_t buflen)
404{
405 struct gss_upcall_msg *gss_msg = container_of(msg,
406 struct gss_upcall_msg,
407 msg);
408 if (msg->copied == 0)
409 gss_encode_v0_msg(gss_msg, file->f_cred);
410 return rpc_pipe_generic_upcall(file, msg, buf, buflen);
411}
412
413static int gss_encode_v1_msg(struct gss_upcall_msg *gss_msg,
414 const char *service_name,
415 const char *target_name,
416 const struct cred *cred)
417{
418 struct user_namespace *userns = cred->user_ns;
419 struct gss_api_mech *mech = gss_msg->auth->mech;
420 char *p = gss_msg->databuf;
421 size_t buflen = sizeof(gss_msg->databuf);
422 int len;
423
424 len = scnprintf(p, buflen, "mech=%s uid=%d", mech->gm_name,
425 from_kuid_munged(userns, gss_msg->uid));
426 buflen -= len;
427 p += len;
428 gss_msg->msg.len = len;
429
430
431
432
433
434 if (target_name) {
435 len = scnprintf(p, buflen, " target=%s", target_name);
436 buflen -= len;
437 p += len;
438 gss_msg->msg.len += len;
439 }
440
441
442
443
444
445
446
447
448
449
450
451 if (service_name) {
452 char *c = strchr(service_name, '@');
453
454 if (!c)
455 len = scnprintf(p, buflen, " service=%s",
456 service_name);
457 else
458 len = scnprintf(p, buflen,
459 " service=%.*s srchost=%s",
460 (int)(c - service_name),
461 service_name, c + 1);
462 buflen -= len;
463 p += len;
464 gss_msg->msg.len += len;
465 }
466
467 if (mech->gm_upcall_enctypes) {
468 len = scnprintf(p, buflen, " enctypes=%s",
469 mech->gm_upcall_enctypes);
470 buflen -= len;
471 p += len;
472 gss_msg->msg.len += len;
473 }
474 trace_rpcgss_upcall_msg(gss_msg->databuf);
475 len = scnprintf(p, buflen, "\n");
476 if (len == 0)
477 goto out_overflow;
478 gss_msg->msg.len += len;
479 gss_msg->msg.data = gss_msg->databuf;
480 return 0;
481out_overflow:
482 WARN_ON_ONCE(1);
483 return -ENOMEM;
484}
485
486static ssize_t
487gss_v1_upcall(struct file *file, struct rpc_pipe_msg *msg,
488 char __user *buf, size_t buflen)
489{
490 struct gss_upcall_msg *gss_msg = container_of(msg,
491 struct gss_upcall_msg,
492 msg);
493 int err;
494 if (msg->copied == 0) {
495 err = gss_encode_v1_msg(gss_msg,
496 gss_msg->service_name,
497 gss_msg->auth->target_name,
498 file->f_cred);
499 if (err)
500 return err;
501 }
502 return rpc_pipe_generic_upcall(file, msg, buf, buflen);
503}
504
505static struct gss_upcall_msg *
506gss_alloc_msg(struct gss_auth *gss_auth,
507 kuid_t uid, const char *service_name)
508{
509 struct gss_upcall_msg *gss_msg;
510 int vers;
511 int err = -ENOMEM;
512
513 gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS);
514 if (gss_msg == NULL)
515 goto err;
516 vers = get_pipe_version(gss_auth->net);
517 err = vers;
518 if (err < 0)
519 goto err_free_msg;
520 gss_msg->pipe = gss_auth->gss_pipe[vers]->pipe;
521 INIT_LIST_HEAD(&gss_msg->list);
522 rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq");
523 init_waitqueue_head(&gss_msg->waitqueue);
524 refcount_set(&gss_msg->count, 1);
525 gss_msg->uid = uid;
526 gss_msg->auth = gss_auth;
527 kref_get(&gss_auth->kref);
528 if (service_name) {
529 gss_msg->service_name = kstrdup_const(service_name, GFP_NOFS);
530 if (!gss_msg->service_name) {
531 err = -ENOMEM;
532 goto err_put_pipe_version;
533 }
534 }
535 return gss_msg;
536err_put_pipe_version:
537 put_pipe_version(gss_auth->net);
538err_free_msg:
539 kfree(gss_msg);
540err:
541 return ERR_PTR(err);
542}
543
544static struct gss_upcall_msg *
545gss_setup_upcall(struct gss_auth *gss_auth, struct rpc_cred *cred)
546{
547 struct gss_cred *gss_cred = container_of(cred,
548 struct gss_cred, gc_base);
549 struct gss_upcall_msg *gss_new, *gss_msg;
550 kuid_t uid = cred->cr_cred->fsuid;
551
552 gss_new = gss_alloc_msg(gss_auth, uid, gss_cred->gc_principal);
553 if (IS_ERR(gss_new))
554 return gss_new;
555 gss_msg = gss_add_msg(gss_new);
556 if (gss_msg == gss_new) {
557 int res;
558 refcount_inc(&gss_msg->count);
559 res = rpc_queue_upcall(gss_new->pipe, &gss_new->msg);
560 if (res) {
561 gss_unhash_msg(gss_new);
562 refcount_dec(&gss_msg->count);
563 gss_release_msg(gss_new);
564 gss_msg = ERR_PTR(res);
565 }
566 } else
567 gss_release_msg(gss_new);
568 return gss_msg;
569}
570
571static void warn_gssd(void)
572{
573 dprintk("AUTH_GSS upcall failed. Please check user daemon is running.\n");
574}
575
576static inline int
577gss_refresh_upcall(struct rpc_task *task)
578{
579 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
580 struct gss_auth *gss_auth = container_of(cred->cr_auth,
581 struct gss_auth, rpc_auth);
582 struct gss_cred *gss_cred = container_of(cred,
583 struct gss_cred, gc_base);
584 struct gss_upcall_msg *gss_msg;
585 struct rpc_pipe *pipe;
586 int err = 0;
587
588 gss_msg = gss_setup_upcall(gss_auth, cred);
589 if (PTR_ERR(gss_msg) == -EAGAIN) {
590
591
592 warn_gssd();
593 rpc_sleep_on_timeout(&pipe_version_rpc_waitqueue,
594 task, NULL, jiffies + (15 * HZ));
595 err = -EAGAIN;
596 goto out;
597 }
598 if (IS_ERR(gss_msg)) {
599 err = PTR_ERR(gss_msg);
600 goto out;
601 }
602 pipe = gss_msg->pipe;
603 spin_lock(&pipe->lock);
604 if (gss_cred->gc_upcall != NULL)
605 rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL);
606 else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) {
607 gss_cred->gc_upcall = gss_msg;
608
609 refcount_inc(&gss_msg->count);
610 rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback);
611 } else {
612 gss_handle_downcall_result(gss_cred, gss_msg);
613 err = gss_msg->msg.errno;
614 }
615 spin_unlock(&pipe->lock);
616 gss_release_msg(gss_msg);
617out:
618 trace_rpcgss_upcall_result(from_kuid(&init_user_ns,
619 cred->cr_cred->fsuid), err);
620 return err;
621}
622
623static inline int
624gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred)
625{
626 struct net *net = gss_auth->net;
627 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
628 struct rpc_pipe *pipe;
629 struct rpc_cred *cred = &gss_cred->gc_base;
630 struct gss_upcall_msg *gss_msg;
631 DEFINE_WAIT(wait);
632 int err;
633
634retry:
635 err = 0;
636
637 if (!gssd_running(net)) {
638 warn_gssd();
639 err = -EACCES;
640 goto out;
641 }
642 gss_msg = gss_setup_upcall(gss_auth, cred);
643 if (PTR_ERR(gss_msg) == -EAGAIN) {
644 err = wait_event_interruptible_timeout(pipe_version_waitqueue,
645 sn->pipe_version >= 0, 15 * HZ);
646 if (sn->pipe_version < 0) {
647 warn_gssd();
648 err = -EACCES;
649 }
650 if (err < 0)
651 goto out;
652 goto retry;
653 }
654 if (IS_ERR(gss_msg)) {
655 err = PTR_ERR(gss_msg);
656 goto out;
657 }
658 pipe = gss_msg->pipe;
659 for (;;) {
660 prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_KILLABLE);
661 spin_lock(&pipe->lock);
662 if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) {
663 break;
664 }
665 spin_unlock(&pipe->lock);
666 if (fatal_signal_pending(current)) {
667 err = -ERESTARTSYS;
668 goto out_intr;
669 }
670 schedule();
671 }
672 if (gss_msg->ctx) {
673 trace_rpcgss_ctx_init(gss_cred);
674 gss_cred_set_ctx(cred, gss_msg->ctx);
675 } else {
676 err = gss_msg->msg.errno;
677 }
678 spin_unlock(&pipe->lock);
679out_intr:
680 finish_wait(&gss_msg->waitqueue, &wait);
681 gss_release_msg(gss_msg);
682out:
683 trace_rpcgss_upcall_result(from_kuid(&init_user_ns,
684 cred->cr_cred->fsuid), err);
685 return err;
686}
687
688#define MSG_BUF_MAXSIZE 1024
689
690static ssize_t
691gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
692{
693 const void *p, *end;
694 void *buf;
695 struct gss_upcall_msg *gss_msg;
696 struct rpc_pipe *pipe = RPC_I(file_inode(filp))->pipe;
697 struct gss_cl_ctx *ctx;
698 uid_t id;
699 kuid_t uid;
700 ssize_t err = -EFBIG;
701
702 if (mlen > MSG_BUF_MAXSIZE)
703 goto out;
704 err = -ENOMEM;
705 buf = kmalloc(mlen, GFP_NOFS);
706 if (!buf)
707 goto out;
708
709 err = -EFAULT;
710 if (copy_from_user(buf, src, mlen))
711 goto err;
712
713 end = (const void *)((char *)buf + mlen);
714 p = simple_get_bytes(buf, end, &id, sizeof(id));
715 if (IS_ERR(p)) {
716 err = PTR_ERR(p);
717 goto err;
718 }
719
720 uid = make_kuid(current_user_ns(), id);
721 if (!uid_valid(uid)) {
722 err = -EINVAL;
723 goto err;
724 }
725
726 err = -ENOMEM;
727 ctx = gss_alloc_context();
728 if (ctx == NULL)
729 goto err;
730
731 err = -ENOENT;
732
733 spin_lock(&pipe->lock);
734 gss_msg = __gss_find_upcall(pipe, uid, NULL);
735 if (gss_msg == NULL) {
736 spin_unlock(&pipe->lock);
737 goto err_put_ctx;
738 }
739 list_del_init(&gss_msg->list);
740 spin_unlock(&pipe->lock);
741
742 p = gss_fill_context(p, end, ctx, gss_msg->auth->mech);
743 if (IS_ERR(p)) {
744 err = PTR_ERR(p);
745 switch (err) {
746 case -EACCES:
747 case -EKEYEXPIRED:
748 gss_msg->msg.errno = err;
749 err = mlen;
750 break;
751 case -EFAULT:
752 case -ENOMEM:
753 case -EINVAL:
754 case -ENOSYS:
755 gss_msg->msg.errno = -EAGAIN;
756 break;
757 default:
758 printk(KERN_CRIT "%s: bad return from "
759 "gss_fill_context: %zd\n", __func__, err);
760 gss_msg->msg.errno = -EIO;
761 }
762 goto err_release_msg;
763 }
764 gss_msg->ctx = gss_get_ctx(ctx);
765 err = mlen;
766
767err_release_msg:
768 spin_lock(&pipe->lock);
769 __gss_unhash_msg(gss_msg);
770 spin_unlock(&pipe->lock);
771 gss_release_msg(gss_msg);
772err_put_ctx:
773 gss_put_ctx(ctx);
774err:
775 kfree(buf);
776out:
777 return err;
778}
779
780static int gss_pipe_open(struct inode *inode, int new_version)
781{
782 struct net *net = inode->i_sb->s_fs_info;
783 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
784 int ret = 0;
785
786 spin_lock(&pipe_version_lock);
787 if (sn->pipe_version < 0) {
788
789 sn->pipe_version = new_version;
790 rpc_wake_up(&pipe_version_rpc_waitqueue);
791 wake_up(&pipe_version_waitqueue);
792 } else if (sn->pipe_version != new_version) {
793
794 ret = -EBUSY;
795 goto out;
796 }
797 atomic_inc(&sn->pipe_users);
798out:
799 spin_unlock(&pipe_version_lock);
800 return ret;
801
802}
803
804static int gss_pipe_open_v0(struct inode *inode)
805{
806 return gss_pipe_open(inode, 0);
807}
808
809static int gss_pipe_open_v1(struct inode *inode)
810{
811 return gss_pipe_open(inode, 1);
812}
813
814static void
815gss_pipe_release(struct inode *inode)
816{
817 struct net *net = inode->i_sb->s_fs_info;
818 struct rpc_pipe *pipe = RPC_I(inode)->pipe;
819 struct gss_upcall_msg *gss_msg;
820
821restart:
822 spin_lock(&pipe->lock);
823 list_for_each_entry(gss_msg, &pipe->in_downcall, list) {
824
825 if (!list_empty(&gss_msg->msg.list))
826 continue;
827 gss_msg->msg.errno = -EPIPE;
828 refcount_inc(&gss_msg->count);
829 __gss_unhash_msg(gss_msg);
830 spin_unlock(&pipe->lock);
831 gss_release_msg(gss_msg);
832 goto restart;
833 }
834 spin_unlock(&pipe->lock);
835
836 put_pipe_version(net);
837}
838
839static void
840gss_pipe_destroy_msg(struct rpc_pipe_msg *msg)
841{
842 struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg);
843
844 if (msg->errno < 0) {
845 refcount_inc(&gss_msg->count);
846 gss_unhash_msg(gss_msg);
847 if (msg->errno == -ETIMEDOUT)
848 warn_gssd();
849 gss_release_msg(gss_msg);
850 }
851 gss_release_msg(gss_msg);
852}
853
854static void gss_pipe_dentry_destroy(struct dentry *dir,
855 struct rpc_pipe_dir_object *pdo)
856{
857 struct gss_pipe *gss_pipe = pdo->pdo_data;
858 struct rpc_pipe *pipe = gss_pipe->pipe;
859
860 if (pipe->dentry != NULL) {
861 rpc_unlink(pipe->dentry);
862 pipe->dentry = NULL;
863 }
864}
865
866static int gss_pipe_dentry_create(struct dentry *dir,
867 struct rpc_pipe_dir_object *pdo)
868{
869 struct gss_pipe *p = pdo->pdo_data;
870 struct dentry *dentry;
871
872 dentry = rpc_mkpipe_dentry(dir, p->name, p->clnt, p->pipe);
873 if (IS_ERR(dentry))
874 return PTR_ERR(dentry);
875 p->pipe->dentry = dentry;
876 return 0;
877}
878
879static const struct rpc_pipe_dir_object_ops gss_pipe_dir_object_ops = {
880 .create = gss_pipe_dentry_create,
881 .destroy = gss_pipe_dentry_destroy,
882};
883
884static struct gss_pipe *gss_pipe_alloc(struct rpc_clnt *clnt,
885 const char *name,
886 const struct rpc_pipe_ops *upcall_ops)
887{
888 struct gss_pipe *p;
889 int err = -ENOMEM;
890
891 p = kmalloc(sizeof(*p), GFP_KERNEL);
892 if (p == NULL)
893 goto err;
894 p->pipe = rpc_mkpipe_data(upcall_ops, RPC_PIPE_WAIT_FOR_OPEN);
895 if (IS_ERR(p->pipe)) {
896 err = PTR_ERR(p->pipe);
897 goto err_free_gss_pipe;
898 }
899 p->name = name;
900 p->clnt = clnt;
901 kref_init(&p->kref);
902 rpc_init_pipe_dir_object(&p->pdo,
903 &gss_pipe_dir_object_ops,
904 p);
905 return p;
906err_free_gss_pipe:
907 kfree(p);
908err:
909 return ERR_PTR(err);
910}
911
912struct gss_alloc_pdo {
913 struct rpc_clnt *clnt;
914 const char *name;
915 const struct rpc_pipe_ops *upcall_ops;
916};
917
918static int gss_pipe_match_pdo(struct rpc_pipe_dir_object *pdo, void *data)
919{
920 struct gss_pipe *gss_pipe;
921 struct gss_alloc_pdo *args = data;
922
923 if (pdo->pdo_ops != &gss_pipe_dir_object_ops)
924 return 0;
925 gss_pipe = container_of(pdo, struct gss_pipe, pdo);
926 if (strcmp(gss_pipe->name, args->name) != 0)
927 return 0;
928 if (!kref_get_unless_zero(&gss_pipe->kref))
929 return 0;
930 return 1;
931}
932
933static struct rpc_pipe_dir_object *gss_pipe_alloc_pdo(void *data)
934{
935 struct gss_pipe *gss_pipe;
936 struct gss_alloc_pdo *args = data;
937
938 gss_pipe = gss_pipe_alloc(args->clnt, args->name, args->upcall_ops);
939 if (!IS_ERR(gss_pipe))
940 return &gss_pipe->pdo;
941 return NULL;
942}
943
944static struct gss_pipe *gss_pipe_get(struct rpc_clnt *clnt,
945 const char *name,
946 const struct rpc_pipe_ops *upcall_ops)
947{
948 struct net *net = rpc_net_ns(clnt);
949 struct rpc_pipe_dir_object *pdo;
950 struct gss_alloc_pdo args = {
951 .clnt = clnt,
952 .name = name,
953 .upcall_ops = upcall_ops,
954 };
955
956 pdo = rpc_find_or_alloc_pipe_dir_object(net,
957 &clnt->cl_pipedir_objects,
958 gss_pipe_match_pdo,
959 gss_pipe_alloc_pdo,
960 &args);
961 if (pdo != NULL)
962 return container_of(pdo, struct gss_pipe, pdo);
963 return ERR_PTR(-ENOMEM);
964}
965
966static void __gss_pipe_free(struct gss_pipe *p)
967{
968 struct rpc_clnt *clnt = p->clnt;
969 struct net *net = rpc_net_ns(clnt);
970
971 rpc_remove_pipe_dir_object(net,
972 &clnt->cl_pipedir_objects,
973 &p->pdo);
974 rpc_destroy_pipe_data(p->pipe);
975 kfree(p);
976}
977
978static void __gss_pipe_release(struct kref *kref)
979{
980 struct gss_pipe *p = container_of(kref, struct gss_pipe, kref);
981
982 __gss_pipe_free(p);
983}
984
985static void gss_pipe_free(struct gss_pipe *p)
986{
987 if (p != NULL)
988 kref_put(&p->kref, __gss_pipe_release);
989}
990
991
992
993
994
995static struct gss_auth *
996gss_create_new(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
997{
998 rpc_authflavor_t flavor = args->pseudoflavor;
999 struct gss_auth *gss_auth;
1000 struct gss_pipe *gss_pipe;
1001 struct rpc_auth * auth;
1002 int err = -ENOMEM;
1003
1004 if (!try_module_get(THIS_MODULE))
1005 return ERR_PTR(err);
1006 if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL)))
1007 goto out_dec;
1008 INIT_HLIST_NODE(&gss_auth->hash);
1009 gss_auth->target_name = NULL;
1010 if (args->target_name) {
1011 gss_auth->target_name = kstrdup(args->target_name, GFP_KERNEL);
1012 if (gss_auth->target_name == NULL)
1013 goto err_free;
1014 }
1015 gss_auth->client = clnt;
1016 gss_auth->net = get_net(rpc_net_ns(clnt));
1017 err = -EINVAL;
1018 gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor);
1019 if (!gss_auth->mech)
1020 goto err_put_net;
1021 gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor);
1022 if (gss_auth->service == 0)
1023 goto err_put_mech;
1024 if (!gssd_running(gss_auth->net))
1025 goto err_put_mech;
1026 auth = &gss_auth->rpc_auth;
1027 auth->au_cslack = GSS_CRED_SLACK >> 2;
1028 auth->au_rslack = GSS_KRB5_MAX_SLACK_NEEDED >> 2;
1029 auth->au_verfsize = GSS_VERF_SLACK >> 2;
1030 auth->au_ralign = GSS_VERF_SLACK >> 2;
1031 __set_bit(RPCAUTH_AUTH_UPDATE_SLACK, &auth->au_flags);
1032 auth->au_ops = &authgss_ops;
1033 auth->au_flavor = flavor;
1034 if (gss_pseudoflavor_to_datatouch(gss_auth->mech, flavor))
1035 __set_bit(RPCAUTH_AUTH_DATATOUCH, &auth->au_flags);
1036 refcount_set(&auth->au_count, 1);
1037 kref_init(&gss_auth->kref);
1038
1039 err = rpcauth_init_credcache(auth);
1040 if (err)
1041 goto err_put_mech;
1042
1043
1044
1045
1046
1047
1048 gss_pipe = gss_pipe_get(clnt, "gssd", &gss_upcall_ops_v1);
1049 if (IS_ERR(gss_pipe)) {
1050 err = PTR_ERR(gss_pipe);
1051 goto err_destroy_credcache;
1052 }
1053 gss_auth->gss_pipe[1] = gss_pipe;
1054
1055 gss_pipe = gss_pipe_get(clnt, gss_auth->mech->gm_name,
1056 &gss_upcall_ops_v0);
1057 if (IS_ERR(gss_pipe)) {
1058 err = PTR_ERR(gss_pipe);
1059 goto err_destroy_pipe_1;
1060 }
1061 gss_auth->gss_pipe[0] = gss_pipe;
1062
1063 return gss_auth;
1064err_destroy_pipe_1:
1065 gss_pipe_free(gss_auth->gss_pipe[1]);
1066err_destroy_credcache:
1067 rpcauth_destroy_credcache(auth);
1068err_put_mech:
1069 gss_mech_put(gss_auth->mech);
1070err_put_net:
1071 put_net(gss_auth->net);
1072err_free:
1073 kfree(gss_auth->target_name);
1074 kfree(gss_auth);
1075out_dec:
1076 module_put(THIS_MODULE);
1077 trace_rpcgss_createauth(flavor, err);
1078 return ERR_PTR(err);
1079}
1080
1081static void
1082gss_free(struct gss_auth *gss_auth)
1083{
1084 gss_pipe_free(gss_auth->gss_pipe[0]);
1085 gss_pipe_free(gss_auth->gss_pipe[1]);
1086 gss_mech_put(gss_auth->mech);
1087 put_net(gss_auth->net);
1088 kfree(gss_auth->target_name);
1089
1090 kfree(gss_auth);
1091 module_put(THIS_MODULE);
1092}
1093
1094static void
1095gss_free_callback(struct kref *kref)
1096{
1097 struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref);
1098
1099 gss_free(gss_auth);
1100}
1101
1102static void
1103gss_put_auth(struct gss_auth *gss_auth)
1104{
1105 kref_put(&gss_auth->kref, gss_free_callback);
1106}
1107
1108static void
1109gss_destroy(struct rpc_auth *auth)
1110{
1111 struct gss_auth *gss_auth = container_of(auth,
1112 struct gss_auth, rpc_auth);
1113
1114 if (hash_hashed(&gss_auth->hash)) {
1115 spin_lock(&gss_auth_hash_lock);
1116 hash_del(&gss_auth->hash);
1117 spin_unlock(&gss_auth_hash_lock);
1118 }
1119
1120 gss_pipe_free(gss_auth->gss_pipe[0]);
1121 gss_auth->gss_pipe[0] = NULL;
1122 gss_pipe_free(gss_auth->gss_pipe[1]);
1123 gss_auth->gss_pipe[1] = NULL;
1124 rpcauth_destroy_credcache(auth);
1125
1126 gss_put_auth(gss_auth);
1127}
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138static struct gss_auth *
1139gss_auth_find_or_add_hashed(const struct rpc_auth_create_args *args,
1140 struct rpc_clnt *clnt,
1141 struct gss_auth *new)
1142{
1143 struct gss_auth *gss_auth;
1144 unsigned long hashval = (unsigned long)clnt;
1145
1146 spin_lock(&gss_auth_hash_lock);
1147 hash_for_each_possible(gss_auth_hash_table,
1148 gss_auth,
1149 hash,
1150 hashval) {
1151 if (gss_auth->client != clnt)
1152 continue;
1153 if (gss_auth->rpc_auth.au_flavor != args->pseudoflavor)
1154 continue;
1155 if (gss_auth->target_name != args->target_name) {
1156 if (gss_auth->target_name == NULL)
1157 continue;
1158 if (args->target_name == NULL)
1159 continue;
1160 if (strcmp(gss_auth->target_name, args->target_name))
1161 continue;
1162 }
1163 if (!refcount_inc_not_zero(&gss_auth->rpc_auth.au_count))
1164 continue;
1165 goto out;
1166 }
1167 if (new)
1168 hash_add(gss_auth_hash_table, &new->hash, hashval);
1169 gss_auth = new;
1170out:
1171 spin_unlock(&gss_auth_hash_lock);
1172 return gss_auth;
1173}
1174
1175static struct gss_auth *
1176gss_create_hashed(const struct rpc_auth_create_args *args,
1177 struct rpc_clnt *clnt)
1178{
1179 struct gss_auth *gss_auth;
1180 struct gss_auth *new;
1181
1182 gss_auth = gss_auth_find_or_add_hashed(args, clnt, NULL);
1183 if (gss_auth != NULL)
1184 goto out;
1185 new = gss_create_new(args, clnt);
1186 if (IS_ERR(new))
1187 return new;
1188 gss_auth = gss_auth_find_or_add_hashed(args, clnt, new);
1189 if (gss_auth != new)
1190 gss_destroy(&new->rpc_auth);
1191out:
1192 return gss_auth;
1193}
1194
1195static struct rpc_auth *
1196gss_create(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
1197{
1198 struct gss_auth *gss_auth;
1199 struct rpc_xprt_switch *xps = rcu_access_pointer(clnt->cl_xpi.xpi_xpswitch);
1200
1201 while (clnt != clnt->cl_parent) {
1202 struct rpc_clnt *parent = clnt->cl_parent;
1203
1204 if (rcu_access_pointer(parent->cl_xpi.xpi_xpswitch) != xps)
1205 break;
1206 clnt = parent;
1207 }
1208
1209 gss_auth = gss_create_hashed(args, clnt);
1210 if (IS_ERR(gss_auth))
1211 return ERR_CAST(gss_auth);
1212 return &gss_auth->rpc_auth;
1213}
1214
1215static struct gss_cred *
1216gss_dup_cred(struct gss_auth *gss_auth, struct gss_cred *gss_cred)
1217{
1218 struct gss_cred *new;
1219
1220
1221 new = kzalloc(sizeof(*gss_cred), GFP_NOFS);
1222 if (new) {
1223 struct auth_cred acred = {
1224 .cred = gss_cred->gc_base.cr_cred,
1225 };
1226 struct gss_cl_ctx *ctx =
1227 rcu_dereference_protected(gss_cred->gc_ctx, 1);
1228
1229 rpcauth_init_cred(&new->gc_base, &acred,
1230 &gss_auth->rpc_auth,
1231 &gss_nullops);
1232 new->gc_base.cr_flags = 1UL << RPCAUTH_CRED_UPTODATE;
1233 new->gc_service = gss_cred->gc_service;
1234 new->gc_principal = gss_cred->gc_principal;
1235 kref_get(&gss_auth->kref);
1236 rcu_assign_pointer(new->gc_ctx, ctx);
1237 gss_get_ctx(ctx);
1238 }
1239 return new;
1240}
1241
1242
1243
1244
1245
1246
1247
1248static void
1249gss_send_destroy_context(struct rpc_cred *cred)
1250{
1251 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
1252 struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth);
1253 struct gss_cl_ctx *ctx = rcu_dereference_protected(gss_cred->gc_ctx, 1);
1254 struct gss_cred *new;
1255 struct rpc_task *task;
1256
1257 new = gss_dup_cred(gss_auth, gss_cred);
1258 if (new) {
1259 ctx->gc_proc = RPC_GSS_PROC_DESTROY;
1260
1261 trace_rpcgss_ctx_destroy(gss_cred);
1262 task = rpc_call_null(gss_auth->client, &new->gc_base,
1263 RPC_TASK_ASYNC);
1264 if (!IS_ERR(task))
1265 rpc_put_task(task);
1266
1267 put_rpccred(&new->gc_base);
1268 }
1269}
1270
1271
1272
1273
1274static void
1275gss_do_free_ctx(struct gss_cl_ctx *ctx)
1276{
1277 gss_delete_sec_context(&ctx->gc_gss_ctx);
1278 kfree(ctx->gc_wire_ctx.data);
1279 kfree(ctx->gc_acceptor.data);
1280 kfree(ctx);
1281}
1282
1283static void
1284gss_free_ctx_callback(struct rcu_head *head)
1285{
1286 struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu);
1287 gss_do_free_ctx(ctx);
1288}
1289
1290static void
1291gss_free_ctx(struct gss_cl_ctx *ctx)
1292{
1293 call_rcu(&ctx->gc_rcu, gss_free_ctx_callback);
1294}
1295
1296static void
1297gss_free_cred(struct gss_cred *gss_cred)
1298{
1299 kfree(gss_cred);
1300}
1301
1302static void
1303gss_free_cred_callback(struct rcu_head *head)
1304{
1305 struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu);
1306 gss_free_cred(gss_cred);
1307}
1308
1309static void
1310gss_destroy_nullcred(struct rpc_cred *cred)
1311{
1312 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
1313 struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth);
1314 struct gss_cl_ctx *ctx = rcu_dereference_protected(gss_cred->gc_ctx, 1);
1315
1316 RCU_INIT_POINTER(gss_cred->gc_ctx, NULL);
1317 put_cred(cred->cr_cred);
1318 call_rcu(&cred->cr_rcu, gss_free_cred_callback);
1319 if (ctx)
1320 gss_put_ctx(ctx);
1321 gss_put_auth(gss_auth);
1322}
1323
1324static void
1325gss_destroy_cred(struct rpc_cred *cred)
1326{
1327 if (test_and_clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0)
1328 gss_send_destroy_context(cred);
1329 gss_destroy_nullcred(cred);
1330}
1331
1332static int
1333gss_hash_cred(struct auth_cred *acred, unsigned int hashbits)
1334{
1335 return hash_64(from_kuid(&init_user_ns, acred->cred->fsuid), hashbits);
1336}
1337
1338
1339
1340
1341static struct rpc_cred *
1342gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
1343{
1344 return rpcauth_lookup_credcache(auth, acred, flags, GFP_NOFS);
1345}
1346
1347static struct rpc_cred *
1348gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags, gfp_t gfp)
1349{
1350 struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth);
1351 struct gss_cred *cred = NULL;
1352 int err = -ENOMEM;
1353
1354 if (!(cred = kzalloc(sizeof(*cred), gfp)))
1355 goto out_err;
1356
1357 rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops);
1358
1359
1360
1361
1362 cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW;
1363 cred->gc_service = gss_auth->service;
1364 cred->gc_principal = acred->principal;
1365 kref_get(&gss_auth->kref);
1366 return &cred->gc_base;
1367
1368out_err:
1369 return ERR_PTR(err);
1370}
1371
1372static int
1373gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred)
1374{
1375 struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth);
1376 struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base);
1377 int err;
1378
1379 do {
1380 err = gss_create_upcall(gss_auth, gss_cred);
1381 } while (err == -EAGAIN);
1382 return err;
1383}
1384
1385static char *
1386gss_stringify_acceptor(struct rpc_cred *cred)
1387{
1388 char *string = NULL;
1389 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
1390 struct gss_cl_ctx *ctx;
1391 unsigned int len;
1392 struct xdr_netobj *acceptor;
1393
1394 rcu_read_lock();
1395 ctx = rcu_dereference(gss_cred->gc_ctx);
1396 if (!ctx)
1397 goto out;
1398
1399 len = ctx->gc_acceptor.len;
1400 rcu_read_unlock();
1401
1402
1403 if (!len)
1404 return NULL;
1405realloc:
1406 string = kmalloc(len + 1, GFP_KERNEL);
1407 if (!string)
1408 return NULL;
1409
1410 rcu_read_lock();
1411 ctx = rcu_dereference(gss_cred->gc_ctx);
1412
1413
1414 if (!ctx || !ctx->gc_acceptor.len) {
1415 kfree(string);
1416 string = NULL;
1417 goto out;
1418 }
1419
1420 acceptor = &ctx->gc_acceptor;
1421
1422
1423
1424
1425
1426 if (len < acceptor->len) {
1427 len = acceptor->len;
1428 rcu_read_unlock();
1429 kfree(string);
1430 goto realloc;
1431 }
1432
1433 memcpy(string, acceptor->data, acceptor->len);
1434 string[acceptor->len] = '\0';
1435out:
1436 rcu_read_unlock();
1437 return string;
1438}
1439
1440
1441
1442
1443
1444static int
1445gss_key_timeout(struct rpc_cred *rc)
1446{
1447 struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base);
1448 struct gss_cl_ctx *ctx;
1449 unsigned long timeout = jiffies + (gss_key_expire_timeo * HZ);
1450 int ret = 0;
1451
1452 rcu_read_lock();
1453 ctx = rcu_dereference(gss_cred->gc_ctx);
1454 if (!ctx || time_after(timeout, ctx->gc_expiry))
1455 ret = -EACCES;
1456 rcu_read_unlock();
1457
1458 return ret;
1459}
1460
1461static int
1462gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags)
1463{
1464 struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base);
1465 struct gss_cl_ctx *ctx;
1466 int ret;
1467
1468 if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags))
1469 goto out;
1470
1471 rcu_read_lock();
1472 ctx = rcu_dereference(gss_cred->gc_ctx);
1473 if (!ctx || time_after(jiffies, ctx->gc_expiry)) {
1474 rcu_read_unlock();
1475 return 0;
1476 }
1477 rcu_read_unlock();
1478 if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags))
1479 return 0;
1480out:
1481 if (acred->principal != NULL) {
1482 if (gss_cred->gc_principal == NULL)
1483 return 0;
1484 ret = strcmp(acred->principal, gss_cred->gc_principal) == 0;
1485 } else {
1486 if (gss_cred->gc_principal != NULL)
1487 return 0;
1488 ret = uid_eq(rc->cr_cred->fsuid, acred->cred->fsuid);
1489 }
1490 return ret;
1491}
1492
1493
1494
1495
1496
1497
1498
1499
1500static int gss_marshal(struct rpc_task *task, struct xdr_stream *xdr)
1501{
1502 struct rpc_rqst *req = task->tk_rqstp;
1503 struct rpc_cred *cred = req->rq_cred;
1504 struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
1505 gc_base);
1506 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1507 __be32 *p, *cred_len;
1508 u32 maj_stat = 0;
1509 struct xdr_netobj mic;
1510 struct kvec iov;
1511 struct xdr_buf verf_buf;
1512 int status;
1513
1514
1515
1516 p = xdr_reserve_space(xdr, 7 * sizeof(*p) +
1517 ctx->gc_wire_ctx.len);
1518 if (!p)
1519 goto marshal_failed;
1520 *p++ = rpc_auth_gss;
1521 cred_len = p++;
1522
1523 spin_lock(&ctx->gc_seq_lock);
1524 req->rq_seqno = (ctx->gc_seq < MAXSEQ) ? ctx->gc_seq++ : MAXSEQ;
1525 spin_unlock(&ctx->gc_seq_lock);
1526 if (req->rq_seqno == MAXSEQ)
1527 goto expired;
1528 trace_rpcgss_seqno(task);
1529
1530 *p++ = cpu_to_be32(RPC_GSS_VERSION);
1531 *p++ = cpu_to_be32(ctx->gc_proc);
1532 *p++ = cpu_to_be32(req->rq_seqno);
1533 *p++ = cpu_to_be32(gss_cred->gc_service);
1534 p = xdr_encode_netobj(p, &ctx->gc_wire_ctx);
1535 *cred_len = cpu_to_be32((p - (cred_len + 1)) << 2);
1536
1537
1538
1539
1540
1541 iov.iov_base = req->rq_snd_buf.head[0].iov_base;
1542 iov.iov_len = (u8 *)p - (u8 *)iov.iov_base;
1543 xdr_buf_from_iov(&iov, &verf_buf);
1544
1545 p = xdr_reserve_space(xdr, sizeof(*p));
1546 if (!p)
1547 goto marshal_failed;
1548 *p++ = rpc_auth_gss;
1549 mic.data = (u8 *)(p + 1);
1550 maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic);
1551 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1552 goto expired;
1553 else if (maj_stat != 0)
1554 goto bad_mic;
1555 if (xdr_stream_encode_opaque_inline(xdr, (void **)&p, mic.len) < 0)
1556 goto marshal_failed;
1557 status = 0;
1558out:
1559 gss_put_ctx(ctx);
1560 return status;
1561expired:
1562 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1563 status = -EKEYEXPIRED;
1564 goto out;
1565marshal_failed:
1566 status = -EMSGSIZE;
1567 goto out;
1568bad_mic:
1569 trace_rpcgss_get_mic(task, maj_stat);
1570 status = -EIO;
1571 goto out;
1572}
1573
1574static int gss_renew_cred(struct rpc_task *task)
1575{
1576 struct rpc_cred *oldcred = task->tk_rqstp->rq_cred;
1577 struct gss_cred *gss_cred = container_of(oldcred,
1578 struct gss_cred,
1579 gc_base);
1580 struct rpc_auth *auth = oldcred->cr_auth;
1581 struct auth_cred acred = {
1582 .cred = oldcred->cr_cred,
1583 .principal = gss_cred->gc_principal,
1584 };
1585 struct rpc_cred *new;
1586
1587 new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW);
1588 if (IS_ERR(new))
1589 return PTR_ERR(new);
1590
1591 task->tk_rqstp->rq_cred = new;
1592 put_rpccred(oldcred);
1593 return 0;
1594}
1595
1596static int gss_cred_is_negative_entry(struct rpc_cred *cred)
1597{
1598 if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) {
1599 unsigned long now = jiffies;
1600 unsigned long begin, expire;
1601 struct gss_cred *gss_cred;
1602
1603 gss_cred = container_of(cred, struct gss_cred, gc_base);
1604 begin = gss_cred->gc_upcall_timestamp;
1605 expire = begin + gss_expired_cred_retry_delay * HZ;
1606
1607 if (time_in_range_open(now, begin, expire))
1608 return 1;
1609 }
1610 return 0;
1611}
1612
1613
1614
1615
1616static int
1617gss_refresh(struct rpc_task *task)
1618{
1619 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
1620 int ret = 0;
1621
1622 if (gss_cred_is_negative_entry(cred))
1623 return -EKEYEXPIRED;
1624
1625 if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) &&
1626 !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) {
1627 ret = gss_renew_cred(task);
1628 if (ret < 0)
1629 goto out;
1630 cred = task->tk_rqstp->rq_cred;
1631 }
1632
1633 if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags))
1634 ret = gss_refresh_upcall(task);
1635out:
1636 return ret;
1637}
1638
1639
1640static int
1641gss_refresh_null(struct rpc_task *task)
1642{
1643 return 0;
1644}
1645
1646static int
1647gss_validate(struct rpc_task *task, struct xdr_stream *xdr)
1648{
1649 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
1650 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1651 __be32 *p, *seq = NULL;
1652 struct kvec iov;
1653 struct xdr_buf verf_buf;
1654 struct xdr_netobj mic;
1655 u32 len, maj_stat;
1656 int status;
1657
1658 p = xdr_inline_decode(xdr, 2 * sizeof(*p));
1659 if (!p)
1660 goto validate_failed;
1661 if (*p++ != rpc_auth_gss)
1662 goto validate_failed;
1663 len = be32_to_cpup(p);
1664 if (len > RPC_MAX_AUTH_SIZE)
1665 goto validate_failed;
1666 p = xdr_inline_decode(xdr, len);
1667 if (!p)
1668 goto validate_failed;
1669
1670 seq = kmalloc(4, GFP_NOFS);
1671 if (!seq)
1672 goto validate_failed;
1673 *seq = cpu_to_be32(task->tk_rqstp->rq_seqno);
1674 iov.iov_base = seq;
1675 iov.iov_len = 4;
1676 xdr_buf_from_iov(&iov, &verf_buf);
1677 mic.data = (u8 *)p;
1678 mic.len = len;
1679 maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic);
1680 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1681 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1682 if (maj_stat)
1683 goto bad_mic;
1684
1685
1686
1687 if (test_bit(RPCAUTH_AUTH_UPDATE_SLACK, &cred->cr_auth->au_flags))
1688 cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2;
1689 status = 0;
1690out:
1691 gss_put_ctx(ctx);
1692 kfree(seq);
1693 return status;
1694
1695validate_failed:
1696 status = -EIO;
1697 goto out;
1698bad_mic:
1699 trace_rpcgss_verify_mic(task, maj_stat);
1700 status = -EACCES;
1701 goto out;
1702}
1703
1704static noinline_for_stack int
1705gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1706 struct rpc_task *task, struct xdr_stream *xdr)
1707{
1708 struct rpc_rqst *rqstp = task->tk_rqstp;
1709 struct xdr_buf integ_buf, *snd_buf = &rqstp->rq_snd_buf;
1710 struct xdr_netobj mic;
1711 __be32 *p, *integ_len;
1712 u32 offset, maj_stat;
1713
1714 p = xdr_reserve_space(xdr, 2 * sizeof(*p));
1715 if (!p)
1716 goto wrap_failed;
1717 integ_len = p++;
1718 *p = cpu_to_be32(rqstp->rq_seqno);
1719
1720 if (rpcauth_wrap_req_encode(task, xdr))
1721 goto wrap_failed;
1722
1723 offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base;
1724 if (xdr_buf_subsegment(snd_buf, &integ_buf,
1725 offset, snd_buf->len - offset))
1726 goto wrap_failed;
1727 *integ_len = cpu_to_be32(integ_buf.len);
1728
1729 p = xdr_reserve_space(xdr, 0);
1730 if (!p)
1731 goto wrap_failed;
1732 mic.data = (u8 *)(p + 1);
1733 maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic);
1734 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1735 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1736 else if (maj_stat)
1737 goto bad_mic;
1738
1739 if (xdr_stream_encode_opaque_inline(xdr, (void **)&p, mic.len) < 0)
1740 goto wrap_failed;
1741 return 0;
1742wrap_failed:
1743 return -EMSGSIZE;
1744bad_mic:
1745 trace_rpcgss_get_mic(task, maj_stat);
1746 return -EIO;
1747}
1748
1749static void
1750priv_release_snd_buf(struct rpc_rqst *rqstp)
1751{
1752 int i;
1753
1754 for (i=0; i < rqstp->rq_enc_pages_num; i++)
1755 __free_page(rqstp->rq_enc_pages[i]);
1756 kfree(rqstp->rq_enc_pages);
1757 rqstp->rq_release_snd_buf = NULL;
1758}
1759
1760static int
1761alloc_enc_pages(struct rpc_rqst *rqstp)
1762{
1763 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
1764 int first, last, i;
1765
1766 if (rqstp->rq_release_snd_buf)
1767 rqstp->rq_release_snd_buf(rqstp);
1768
1769 if (snd_buf->page_len == 0) {
1770 rqstp->rq_enc_pages_num = 0;
1771 return 0;
1772 }
1773
1774 first = snd_buf->page_base >> PAGE_SHIFT;
1775 last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_SHIFT;
1776 rqstp->rq_enc_pages_num = last - first + 1 + 1;
1777 rqstp->rq_enc_pages
1778 = kmalloc_array(rqstp->rq_enc_pages_num,
1779 sizeof(struct page *),
1780 GFP_NOFS);
1781 if (!rqstp->rq_enc_pages)
1782 goto out;
1783 for (i=0; i < rqstp->rq_enc_pages_num; i++) {
1784 rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS);
1785 if (rqstp->rq_enc_pages[i] == NULL)
1786 goto out_free;
1787 }
1788 rqstp->rq_release_snd_buf = priv_release_snd_buf;
1789 return 0;
1790out_free:
1791 rqstp->rq_enc_pages_num = i;
1792 priv_release_snd_buf(rqstp);
1793out:
1794 return -EAGAIN;
1795}
1796
1797static noinline_for_stack int
1798gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1799 struct rpc_task *task, struct xdr_stream *xdr)
1800{
1801 struct rpc_rqst *rqstp = task->tk_rqstp;
1802 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
1803 u32 pad, offset, maj_stat;
1804 int status;
1805 __be32 *p, *opaque_len;
1806 struct page **inpages;
1807 int first;
1808 struct kvec *iov;
1809
1810 status = -EIO;
1811 p = xdr_reserve_space(xdr, 2 * sizeof(*p));
1812 if (!p)
1813 goto wrap_failed;
1814 opaque_len = p++;
1815 *p = cpu_to_be32(rqstp->rq_seqno);
1816
1817 if (rpcauth_wrap_req_encode(task, xdr))
1818 goto wrap_failed;
1819
1820 status = alloc_enc_pages(rqstp);
1821 if (unlikely(status))
1822 goto wrap_failed;
1823 first = snd_buf->page_base >> PAGE_SHIFT;
1824 inpages = snd_buf->pages + first;
1825 snd_buf->pages = rqstp->rq_enc_pages;
1826 snd_buf->page_base -= first << PAGE_SHIFT;
1827
1828
1829
1830
1831
1832
1833 if (snd_buf->page_len || snd_buf->tail[0].iov_len) {
1834 char *tmp;
1835
1836 tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]);
1837 memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len);
1838 snd_buf->tail[0].iov_base = tmp;
1839 }
1840 offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base;
1841 maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages);
1842
1843 if (unlikely(snd_buf->len > snd_buf->buflen))
1844 goto wrap_failed;
1845
1846
1847 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1848 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1849 else if (maj_stat)
1850 goto bad_wrap;
1851
1852 *opaque_len = cpu_to_be32(snd_buf->len - offset);
1853
1854 if (snd_buf->page_len || snd_buf->tail[0].iov_len)
1855 iov = snd_buf->tail;
1856 else
1857 iov = snd_buf->head;
1858 p = iov->iov_base + iov->iov_len;
1859 pad = xdr_pad_size(snd_buf->len - offset);
1860 memset(p, 0, pad);
1861 iov->iov_len += pad;
1862 snd_buf->len += pad;
1863
1864 return 0;
1865wrap_failed:
1866 return status;
1867bad_wrap:
1868 trace_rpcgss_wrap(task, maj_stat);
1869 return -EIO;
1870}
1871
1872static int gss_wrap_req(struct rpc_task *task, struct xdr_stream *xdr)
1873{
1874 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
1875 struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
1876 gc_base);
1877 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1878 int status;
1879
1880 status = -EIO;
1881 if (ctx->gc_proc != RPC_GSS_PROC_DATA) {
1882
1883
1884
1885 status = rpcauth_wrap_req_encode(task, xdr);
1886 goto out;
1887 }
1888 switch (gss_cred->gc_service) {
1889 case RPC_GSS_SVC_NONE:
1890 status = rpcauth_wrap_req_encode(task, xdr);
1891 break;
1892 case RPC_GSS_SVC_INTEGRITY:
1893 status = gss_wrap_req_integ(cred, ctx, task, xdr);
1894 break;
1895 case RPC_GSS_SVC_PRIVACY:
1896 status = gss_wrap_req_priv(cred, ctx, task, xdr);
1897 break;
1898 default:
1899 status = -EIO;
1900 }
1901out:
1902 gss_put_ctx(ctx);
1903 return status;
1904}
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914static void gss_update_rslack(struct rpc_task *task, struct rpc_cred *cred,
1915 unsigned int before, unsigned int after)
1916{
1917 struct rpc_auth *auth = cred->cr_auth;
1918
1919 if (test_and_clear_bit(RPCAUTH_AUTH_UPDATE_SLACK, &auth->au_flags)) {
1920 auth->au_ralign = auth->au_verfsize + before;
1921 auth->au_rslack = auth->au_verfsize + after;
1922 trace_rpcgss_update_slack(task, auth);
1923 }
1924}
1925
1926static int
1927gss_unwrap_resp_auth(struct rpc_task *task, struct rpc_cred *cred)
1928{
1929 gss_update_rslack(task, cred, 0, 0);
1930 return 0;
1931}
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946static noinline_for_stack int
1947gss_unwrap_resp_integ(struct rpc_task *task, struct rpc_cred *cred,
1948 struct gss_cl_ctx *ctx, struct rpc_rqst *rqstp,
1949 struct xdr_stream *xdr)
1950{
1951 struct xdr_buf gss_data, *rcv_buf = &rqstp->rq_rcv_buf;
1952 u32 len, offset, seqno, maj_stat;
1953 struct xdr_netobj mic;
1954 int ret;
1955
1956 ret = -EIO;
1957 mic.data = NULL;
1958
1959
1960 if (xdr_stream_decode_u32(xdr, &len))
1961 goto unwrap_failed;
1962 if (len & 3)
1963 goto unwrap_failed;
1964 offset = rcv_buf->len - xdr_stream_remaining(xdr);
1965 if (xdr_stream_decode_u32(xdr, &seqno))
1966 goto unwrap_failed;
1967 if (seqno != rqstp->rq_seqno)
1968 goto bad_seqno;
1969 if (xdr_buf_subsegment(rcv_buf, &gss_data, offset, len))
1970 goto unwrap_failed;
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981 offset += len;
1982 if (xdr_decode_word(rcv_buf, offset, &len))
1983 goto unwrap_failed;
1984 offset += sizeof(__be32);
1985 if (offset + len > rcv_buf->len)
1986 goto unwrap_failed;
1987 mic.len = len;
1988 mic.data = kmalloc(len, GFP_NOFS);
1989 if (!mic.data)
1990 goto unwrap_failed;
1991 if (read_bytes_from_xdr_buf(rcv_buf, offset, mic.data, mic.len))
1992 goto unwrap_failed;
1993
1994 maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &gss_data, &mic);
1995 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1996 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1997 if (maj_stat != GSS_S_COMPLETE)
1998 goto bad_mic;
1999
2000 gss_update_rslack(task, cred, 2, 2 + 1 + XDR_QUADLEN(mic.len));
2001 ret = 0;
2002
2003out:
2004 kfree(mic.data);
2005 return ret;
2006
2007unwrap_failed:
2008 trace_rpcgss_unwrap_failed(task);
2009 goto out;
2010bad_seqno:
2011 trace_rpcgss_bad_seqno(task, rqstp->rq_seqno, seqno);
2012 goto out;
2013bad_mic:
2014 trace_rpcgss_verify_mic(task, maj_stat);
2015 goto out;
2016}
2017
2018static noinline_for_stack int
2019gss_unwrap_resp_priv(struct rpc_task *task, struct rpc_cred *cred,
2020 struct gss_cl_ctx *ctx, struct rpc_rqst *rqstp,
2021 struct xdr_stream *xdr)
2022{
2023 struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf;
2024 struct kvec *head = rqstp->rq_rcv_buf.head;
2025 u32 offset, opaque_len, maj_stat;
2026 __be32 *p;
2027
2028 p = xdr_inline_decode(xdr, 2 * sizeof(*p));
2029 if (unlikely(!p))
2030 goto unwrap_failed;
2031 opaque_len = be32_to_cpup(p++);
2032 offset = (u8 *)(p) - (u8 *)head->iov_base;
2033 if (offset + opaque_len > rcv_buf->len)
2034 goto unwrap_failed;
2035
2036 maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset,
2037 offset + opaque_len, rcv_buf);
2038 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
2039 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
2040 if (maj_stat != GSS_S_COMPLETE)
2041 goto bad_unwrap;
2042
2043 if (be32_to_cpup(p++) != rqstp->rq_seqno)
2044 goto bad_seqno;
2045
2046
2047
2048
2049 xdr_init_decode(xdr, rcv_buf, p, rqstp);
2050
2051 gss_update_rslack(task, cred, 2 + ctx->gc_gss_ctx->align,
2052 2 + ctx->gc_gss_ctx->slack);
2053
2054 return 0;
2055unwrap_failed:
2056 trace_rpcgss_unwrap_failed(task);
2057 return -EIO;
2058bad_seqno:
2059 trace_rpcgss_bad_seqno(task, rqstp->rq_seqno, be32_to_cpup(--p));
2060 return -EIO;
2061bad_unwrap:
2062 trace_rpcgss_unwrap(task, maj_stat);
2063 return -EIO;
2064}
2065
2066static bool
2067gss_seq_is_newer(u32 new, u32 old)
2068{
2069 return (s32)(new - old) > 0;
2070}
2071
2072static bool
2073gss_xmit_need_reencode(struct rpc_task *task)
2074{
2075 struct rpc_rqst *req = task->tk_rqstp;
2076 struct rpc_cred *cred = req->rq_cred;
2077 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
2078 u32 win, seq_xmit = 0;
2079 bool ret = true;
2080
2081 if (!ctx)
2082 goto out;
2083
2084 if (gss_seq_is_newer(req->rq_seqno, READ_ONCE(ctx->gc_seq)))
2085 goto out_ctx;
2086
2087 seq_xmit = READ_ONCE(ctx->gc_seq_xmit);
2088 while (gss_seq_is_newer(req->rq_seqno, seq_xmit)) {
2089 u32 tmp = seq_xmit;
2090
2091 seq_xmit = cmpxchg(&ctx->gc_seq_xmit, tmp, req->rq_seqno);
2092 if (seq_xmit == tmp) {
2093 ret = false;
2094 goto out_ctx;
2095 }
2096 }
2097
2098 win = ctx->gc_win;
2099 if (win > 0)
2100 ret = !gss_seq_is_newer(req->rq_seqno, seq_xmit - win);
2101
2102out_ctx:
2103 gss_put_ctx(ctx);
2104out:
2105 trace_rpcgss_need_reencode(task, seq_xmit, ret);
2106 return ret;
2107}
2108
2109static int
2110gss_unwrap_resp(struct rpc_task *task, struct xdr_stream *xdr)
2111{
2112 struct rpc_rqst *rqstp = task->tk_rqstp;
2113 struct rpc_cred *cred = rqstp->rq_cred;
2114 struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
2115 gc_base);
2116 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
2117 int status = -EIO;
2118
2119 if (ctx->gc_proc != RPC_GSS_PROC_DATA)
2120 goto out_decode;
2121 switch (gss_cred->gc_service) {
2122 case RPC_GSS_SVC_NONE:
2123 status = gss_unwrap_resp_auth(task, cred);
2124 break;
2125 case RPC_GSS_SVC_INTEGRITY:
2126 status = gss_unwrap_resp_integ(task, cred, ctx, rqstp, xdr);
2127 break;
2128 case RPC_GSS_SVC_PRIVACY:
2129 status = gss_unwrap_resp_priv(task, cred, ctx, rqstp, xdr);
2130 break;
2131 }
2132 if (status)
2133 goto out;
2134
2135out_decode:
2136 status = rpcauth_unwrap_resp_decode(task, xdr);
2137out:
2138 gss_put_ctx(ctx);
2139 return status;
2140}
2141
2142static const struct rpc_authops authgss_ops = {
2143 .owner = THIS_MODULE,
2144 .au_flavor = RPC_AUTH_GSS,
2145 .au_name = "RPCSEC_GSS",
2146 .create = gss_create,
2147 .destroy = gss_destroy,
2148 .hash_cred = gss_hash_cred,
2149 .lookup_cred = gss_lookup_cred,
2150 .crcreate = gss_create_cred,
2151 .info2flavor = gss_mech_info2flavor,
2152 .flavor2info = gss_mech_flavor2info,
2153};
2154
2155static const struct rpc_credops gss_credops = {
2156 .cr_name = "AUTH_GSS",
2157 .crdestroy = gss_destroy_cred,
2158 .cr_init = gss_cred_init,
2159 .crmatch = gss_match,
2160 .crmarshal = gss_marshal,
2161 .crrefresh = gss_refresh,
2162 .crvalidate = gss_validate,
2163 .crwrap_req = gss_wrap_req,
2164 .crunwrap_resp = gss_unwrap_resp,
2165 .crkey_timeout = gss_key_timeout,
2166 .crstringify_acceptor = gss_stringify_acceptor,
2167 .crneed_reencode = gss_xmit_need_reencode,
2168};
2169
2170static const struct rpc_credops gss_nullops = {
2171 .cr_name = "AUTH_GSS",
2172 .crdestroy = gss_destroy_nullcred,
2173 .crmatch = gss_match,
2174 .crmarshal = gss_marshal,
2175 .crrefresh = gss_refresh_null,
2176 .crvalidate = gss_validate,
2177 .crwrap_req = gss_wrap_req,
2178 .crunwrap_resp = gss_unwrap_resp,
2179 .crstringify_acceptor = gss_stringify_acceptor,
2180};
2181
2182static const struct rpc_pipe_ops gss_upcall_ops_v0 = {
2183 .upcall = gss_v0_upcall,
2184 .downcall = gss_pipe_downcall,
2185 .destroy_msg = gss_pipe_destroy_msg,
2186 .open_pipe = gss_pipe_open_v0,
2187 .release_pipe = gss_pipe_release,
2188};
2189
2190static const struct rpc_pipe_ops gss_upcall_ops_v1 = {
2191 .upcall = gss_v1_upcall,
2192 .downcall = gss_pipe_downcall,
2193 .destroy_msg = gss_pipe_destroy_msg,
2194 .open_pipe = gss_pipe_open_v1,
2195 .release_pipe = gss_pipe_release,
2196};
2197
2198static __net_init int rpcsec_gss_init_net(struct net *net)
2199{
2200 return gss_svc_init_net(net);
2201}
2202
2203static __net_exit void rpcsec_gss_exit_net(struct net *net)
2204{
2205 gss_svc_shutdown_net(net);
2206}
2207
2208static struct pernet_operations rpcsec_gss_net_ops = {
2209 .init = rpcsec_gss_init_net,
2210 .exit = rpcsec_gss_exit_net,
2211};
2212
2213
2214
2215
2216static int __init init_rpcsec_gss(void)
2217{
2218 int err = 0;
2219
2220 err = rpcauth_register(&authgss_ops);
2221 if (err)
2222 goto out;
2223 err = gss_svc_init();
2224 if (err)
2225 goto out_unregister;
2226 err = register_pernet_subsys(&rpcsec_gss_net_ops);
2227 if (err)
2228 goto out_svc_exit;
2229 rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version");
2230 return 0;
2231out_svc_exit:
2232 gss_svc_shutdown();
2233out_unregister:
2234 rpcauth_unregister(&authgss_ops);
2235out:
2236 return err;
2237}
2238
2239static void __exit exit_rpcsec_gss(void)
2240{
2241 unregister_pernet_subsys(&rpcsec_gss_net_ops);
2242 gss_svc_shutdown();
2243 rpcauth_unregister(&authgss_ops);
2244 rcu_barrier();
2245}
2246
2247MODULE_ALIAS("rpc-auth-6");
2248MODULE_LICENSE("GPL");
2249module_param_named(expired_cred_retry_delay,
2250 gss_expired_cred_retry_delay,
2251 uint, 0644);
2252MODULE_PARM_DESC(expired_cred_retry_delay, "Timeout (in seconds) until "
2253 "the RPC engine retries an expired credential");
2254
2255module_param_named(key_expire_timeo,
2256 gss_key_expire_timeo,
2257 uint, 0644);
2258MODULE_PARM_DESC(key_expire_timeo, "Time (in seconds) at the end of a "
2259 "credential keys lifetime where the NFS layer cleans up "
2260 "prior to key expiration");
2261
2262module_init(init_rpcsec_gss)
2263module_exit(exit_rpcsec_gss)
2264