2 * linux/net/sunrpc/auth_gss/auth_gss.c
4 * RPCSEC_GSS client authentication.
6 * Copyright (c) 2000 The Regents of the University of Michigan.
9 * Dug Song <dugsong@monkey.org>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/module.h>
40 #include <linux/init.h>
41 #include <linux/types.h>
42 #include <linux/slab.h>
43 #include <linux/sched.h>
44 #include <linux/pagemap.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/sunrpc/auth.h>
47 #include <linux/sunrpc/auth_gss.h>
48 #include <linux/sunrpc/svcauth_gss.h>
49 #include <linux/sunrpc/gss_err.h>
50 #include <linux/workqueue.h>
51 #include <linux/sunrpc/rpc_pipe_fs.h>
52 #include <linux/sunrpc/gss_api.h>
53 #include <asm/uaccess.h>
55 static const struct rpc_authops authgss_ops;
57 static const struct rpc_credops gss_credops;
58 static const struct rpc_credops gss_nullops;
60 #define GSS_RETRY_EXPIRED 5
61 static unsigned int gss_expired_cred_retry_delay = GSS_RETRY_EXPIRED;
64 # define RPCDBG_FACILITY RPCDBG_AUTH
67 #define GSS_CRED_SLACK (RPC_MAX_AUTH_SIZE * 2)
68 /* length of a krb5 verifier (48), plus data added before arguments when
69 * using integrity (two 4-byte integers): */
70 #define GSS_VERF_SLACK 100
74 struct rpc_auth rpc_auth;
75 struct gss_api_mech *mech;
76 enum rpc_gss_svc service;
77 struct rpc_clnt *client;
79 * There are two upcall pipes; dentry[1], named "gssd", is used
80 * for the new text-based upcall; dentry[0] is named after the
81 * mechanism (for example, "krb5") and exists for
82 * backwards-compatibility with older gssd's.
84 struct dentry *dentry[2];
87 /* pipe_version >= 0 if and only if someone has a pipe open. */
88 static int pipe_version = -1;
89 static atomic_t pipe_users = ATOMIC_INIT(0);
90 static DEFINE_SPINLOCK(pipe_version_lock);
91 static struct rpc_wait_queue pipe_version_rpc_waitqueue;
92 static DECLARE_WAIT_QUEUE_HEAD(pipe_version_waitqueue);
94 static void gss_free_ctx(struct gss_cl_ctx *);
95 static const struct rpc_pipe_ops gss_upcall_ops_v0;
96 static const struct rpc_pipe_ops gss_upcall_ops_v1;
98 static inline struct gss_cl_ctx *
99 gss_get_ctx(struct gss_cl_ctx *ctx)
101 atomic_inc(&ctx->count);
106 gss_put_ctx(struct gss_cl_ctx *ctx)
108 if (atomic_dec_and_test(&ctx->count))
113 * called by gss_upcall_callback and gss_create_upcall in order
114 * to set the gss context. The actual exchange of an old context
115 * and a new one is protected by the rpci->pipe->lock.
118 gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx)
120 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
122 if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags))
125 rcu_assign_pointer(gss_cred->gc_ctx, ctx);
126 set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
127 smp_mb__before_clear_bit();
128 clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags);
132 simple_get_bytes(const void *p, const void *end, void *res, size_t len)
134 const void *q = (const void *)((const char *)p + len);
135 if (unlikely(q > end || q < p))
136 return ERR_PTR(-EFAULT);
141 static inline const void *
142 simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest)
147 p = simple_get_bytes(p, end, &len, sizeof(len));
150 q = (const void *)((const char *)p + len);
151 if (unlikely(q > end || q < p))
152 return ERR_PTR(-EFAULT);
153 dest->data = kmemdup(p, len, GFP_NOFS);
154 if (unlikely(dest->data == NULL))
155 return ERR_PTR(-ENOMEM);
160 static struct gss_cl_ctx *
161 gss_cred_get_ctx(struct rpc_cred *cred)
163 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
164 struct gss_cl_ctx *ctx = NULL;
167 if (gss_cred->gc_ctx)
168 ctx = gss_get_ctx(gss_cred->gc_ctx);
173 static struct gss_cl_ctx *
174 gss_alloc_context(void)
176 struct gss_cl_ctx *ctx;
178 ctx = kzalloc(sizeof(*ctx), GFP_NOFS);
180 ctx->gc_proc = RPC_GSS_PROC_DATA;
181 ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */
182 spin_lock_init(&ctx->gc_seq_lock);
183 atomic_set(&ctx->count,1);
188 #define GSSD_MIN_TIMEOUT (60 * 60)
190 gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm)
194 unsigned int timeout;
198 /* First unsigned int gives the lifetime (in seconds) of the cred */
199 p = simple_get_bytes(p, end, &timeout, sizeof(timeout));
203 timeout = GSSD_MIN_TIMEOUT;
204 ctx->gc_expiry = jiffies + (unsigned long)timeout * HZ * 3 / 4;
205 /* Sequence number window. Determines the maximum number of simultaneous requests */
206 p = simple_get_bytes(p, end, &window_size, sizeof(window_size));
209 ctx->gc_win = window_size;
210 /* gssd signals an error by passing ctx->gc_win = 0: */
211 if (ctx->gc_win == 0) {
213 * in which case, p points to an error code. Anything other
214 * than -EKEYEXPIRED gets converted to -EACCES.
216 p = simple_get_bytes(p, end, &ret, sizeof(ret));
218 p = (ret == -EKEYEXPIRED) ? ERR_PTR(-EKEYEXPIRED) :
222 /* copy the opaque wire context */
223 p = simple_get_netobj(p, end, &ctx->gc_wire_ctx);
226 /* import the opaque security context */
227 p = simple_get_bytes(p, end, &seclen, sizeof(seclen));
230 q = (const void *)((const char *)p + seclen);
231 if (unlikely(q > end || q < p)) {
232 p = ERR_PTR(-EFAULT);
235 ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx, GFP_NOFS);
242 dprintk("RPC: gss_fill_context returning %ld\n", -PTR_ERR(p));
246 #define UPCALL_BUF_LEN 128
248 struct gss_upcall_msg {
251 struct rpc_pipe_msg msg;
252 struct list_head list;
253 struct gss_auth *auth;
254 struct rpc_inode *inode;
255 struct rpc_wait_queue rpc_waitqueue;
256 wait_queue_head_t waitqueue;
257 struct gss_cl_ctx *ctx;
258 char databuf[UPCALL_BUF_LEN];
261 static int get_pipe_version(void)
265 spin_lock(&pipe_version_lock);
266 if (pipe_version >= 0) {
267 atomic_inc(&pipe_users);
271 spin_unlock(&pipe_version_lock);
275 static void put_pipe_version(void)
277 if (atomic_dec_and_lock(&pipe_users, &pipe_version_lock)) {
279 spin_unlock(&pipe_version_lock);
284 gss_release_msg(struct gss_upcall_msg *gss_msg)
286 if (!atomic_dec_and_test(&gss_msg->count))
289 BUG_ON(!list_empty(&gss_msg->list));
290 if (gss_msg->ctx != NULL)
291 gss_put_ctx(gss_msg->ctx);
292 rpc_destroy_wait_queue(&gss_msg->rpc_waitqueue);
296 static struct gss_upcall_msg *
297 __gss_find_upcall(struct rpc_inode *rpci, uid_t uid)
299 struct gss_upcall_msg *pos;
300 list_for_each_entry(pos, &rpci->pipe->in_downcall, list) {
303 atomic_inc(&pos->count);
304 dprintk("RPC: gss_find_upcall found msg %p\n", pos);
307 dprintk("RPC: gss_find_upcall found nothing\n");
311 /* Try to add an upcall to the pipefs queue.
312 * If an upcall owned by our uid already exists, then we return a reference
313 * to that upcall instead of adding the new upcall.
315 static inline struct gss_upcall_msg *
316 gss_add_msg(struct gss_upcall_msg *gss_msg)
318 struct rpc_inode *rpci = gss_msg->inode;
319 struct gss_upcall_msg *old;
321 spin_lock(&rpci->pipe->lock);
322 old = __gss_find_upcall(rpci, gss_msg->uid);
324 atomic_inc(&gss_msg->count);
325 list_add(&gss_msg->list, &rpci->pipe->in_downcall);
328 spin_unlock(&rpci->pipe->lock);
333 __gss_unhash_msg(struct gss_upcall_msg *gss_msg)
335 list_del_init(&gss_msg->list);
336 rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno);
337 wake_up_all(&gss_msg->waitqueue);
338 atomic_dec(&gss_msg->count);
342 gss_unhash_msg(struct gss_upcall_msg *gss_msg)
344 struct rpc_inode *rpci = gss_msg->inode;
346 if (list_empty(&gss_msg->list))
348 spin_lock(&rpci->pipe->lock);
349 if (!list_empty(&gss_msg->list))
350 __gss_unhash_msg(gss_msg);
351 spin_unlock(&rpci->pipe->lock);
355 gss_handle_downcall_result(struct gss_cred *gss_cred, struct gss_upcall_msg *gss_msg)
357 switch (gss_msg->msg.errno) {
359 if (gss_msg->ctx == NULL)
361 clear_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags);
362 gss_cred_set_ctx(&gss_cred->gc_base, gss_msg->ctx);
365 set_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags);
367 gss_cred->gc_upcall_timestamp = jiffies;
368 gss_cred->gc_upcall = NULL;
369 rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno);
373 gss_upcall_callback(struct rpc_task *task)
375 struct gss_cred *gss_cred = container_of(task->tk_rqstp->rq_cred,
376 struct gss_cred, gc_base);
377 struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall;
378 struct rpc_inode *rpci = gss_msg->inode;
380 spin_lock(&rpci->pipe->lock);
381 gss_handle_downcall_result(gss_cred, gss_msg);
382 spin_unlock(&rpci->pipe->lock);
383 task->tk_status = gss_msg->msg.errno;
384 gss_release_msg(gss_msg);
387 static void gss_encode_v0_msg(struct gss_upcall_msg *gss_msg)
389 gss_msg->msg.data = &gss_msg->uid;
390 gss_msg->msg.len = sizeof(gss_msg->uid);
393 static void gss_encode_v1_msg(struct gss_upcall_msg *gss_msg,
394 struct rpc_clnt *clnt,
395 const char *service_name)
397 struct gss_api_mech *mech = gss_msg->auth->mech;
398 char *p = gss_msg->databuf;
401 gss_msg->msg.len = sprintf(gss_msg->databuf, "mech=%s uid=%d ",
404 p += gss_msg->msg.len;
405 if (clnt->cl_principal) {
406 len = sprintf(p, "target=%s ", clnt->cl_principal);
408 gss_msg->msg.len += len;
410 if (service_name != NULL) {
411 len = sprintf(p, "service=%s ", service_name);
413 gss_msg->msg.len += len;
415 if (mech->gm_upcall_enctypes) {
416 len = sprintf(p, "enctypes=%s ", mech->gm_upcall_enctypes);
418 gss_msg->msg.len += len;
420 len = sprintf(p, "\n");
421 gss_msg->msg.len += len;
423 gss_msg->msg.data = gss_msg->databuf;
424 BUG_ON(gss_msg->msg.len > UPCALL_BUF_LEN);
427 static void gss_encode_msg(struct gss_upcall_msg *gss_msg,
428 struct rpc_clnt *clnt,
429 const char *service_name)
431 if (pipe_version == 0)
432 gss_encode_v0_msg(gss_msg);
433 else /* pipe_version == 1 */
434 gss_encode_v1_msg(gss_msg, clnt, service_name);
437 static struct gss_upcall_msg *
438 gss_alloc_msg(struct gss_auth *gss_auth, struct rpc_clnt *clnt,
439 uid_t uid, const char *service_name)
441 struct gss_upcall_msg *gss_msg;
444 gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS);
446 return ERR_PTR(-ENOMEM);
447 vers = get_pipe_version();
450 return ERR_PTR(vers);
452 gss_msg->inode = RPC_I(gss_auth->dentry[vers]->d_inode);
453 INIT_LIST_HEAD(&gss_msg->list);
454 rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq");
455 init_waitqueue_head(&gss_msg->waitqueue);
456 atomic_set(&gss_msg->count, 1);
458 gss_msg->auth = gss_auth;
459 gss_encode_msg(gss_msg, clnt, service_name);
463 static struct gss_upcall_msg *
464 gss_setup_upcall(struct rpc_clnt *clnt, struct gss_auth *gss_auth, struct rpc_cred *cred)
466 struct gss_cred *gss_cred = container_of(cred,
467 struct gss_cred, gc_base);
468 struct gss_upcall_msg *gss_new, *gss_msg;
469 uid_t uid = cred->cr_uid;
471 gss_new = gss_alloc_msg(gss_auth, clnt, uid, gss_cred->gc_principal);
474 gss_msg = gss_add_msg(gss_new);
475 if (gss_msg == gss_new) {
476 int res = rpc_queue_upcall(gss_new->inode->pipe, &gss_new->msg);
478 gss_unhash_msg(gss_new);
479 gss_msg = ERR_PTR(res);
482 gss_release_msg(gss_new);
486 static void warn_gssd(void)
488 static unsigned long ratelimit;
489 unsigned long now = jiffies;
491 if (time_after(now, ratelimit)) {
492 printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n"
493 "Please check user daemon is running.\n");
494 ratelimit = now + 15*HZ;
499 gss_refresh_upcall(struct rpc_task *task)
501 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
502 struct gss_auth *gss_auth = container_of(cred->cr_auth,
503 struct gss_auth, rpc_auth);
504 struct gss_cred *gss_cred = container_of(cred,
505 struct gss_cred, gc_base);
506 struct gss_upcall_msg *gss_msg;
507 struct rpc_inode *rpci;
510 dprintk("RPC: %5u gss_refresh_upcall for uid %u\n", task->tk_pid,
512 gss_msg = gss_setup_upcall(task->tk_client, gss_auth, cred);
513 if (PTR_ERR(gss_msg) == -EAGAIN) {
514 /* XXX: warning on the first, under the assumption we
515 * shouldn't normally hit this case on a refresh. */
517 task->tk_timeout = 15*HZ;
518 rpc_sleep_on(&pipe_version_rpc_waitqueue, task, NULL);
521 if (IS_ERR(gss_msg)) {
522 err = PTR_ERR(gss_msg);
525 rpci = gss_msg->inode;
526 spin_lock(&rpci->pipe->lock);
527 if (gss_cred->gc_upcall != NULL)
528 rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL);
529 else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) {
530 task->tk_timeout = 0;
531 gss_cred->gc_upcall = gss_msg;
532 /* gss_upcall_callback will release the reference to gss_upcall_msg */
533 atomic_inc(&gss_msg->count);
534 rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback);
536 gss_handle_downcall_result(gss_cred, gss_msg);
537 err = gss_msg->msg.errno;
539 spin_unlock(&rpci->pipe->lock);
540 gss_release_msg(gss_msg);
542 dprintk("RPC: %5u gss_refresh_upcall for uid %u result %d\n",
543 task->tk_pid, cred->cr_uid, err);
548 gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred)
550 struct rpc_inode *rpci;
551 struct rpc_cred *cred = &gss_cred->gc_base;
552 struct gss_upcall_msg *gss_msg;
556 dprintk("RPC: gss_upcall for uid %u\n", cred->cr_uid);
558 gss_msg = gss_setup_upcall(gss_auth->client, gss_auth, cred);
559 if (PTR_ERR(gss_msg) == -EAGAIN) {
560 err = wait_event_interruptible_timeout(pipe_version_waitqueue,
561 pipe_version >= 0, 15*HZ);
562 if (pipe_version < 0) {
570 if (IS_ERR(gss_msg)) {
571 err = PTR_ERR(gss_msg);
574 rpci = gss_msg->inode;
576 prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_KILLABLE);
577 spin_lock(&rpci->pipe->lock);
578 if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) {
581 spin_unlock(&rpci->pipe->lock);
582 if (fatal_signal_pending(current)) {
589 gss_cred_set_ctx(cred, gss_msg->ctx);
591 err = gss_msg->msg.errno;
592 spin_unlock(&rpci->pipe->lock);
594 finish_wait(&gss_msg->waitqueue, &wait);
595 gss_release_msg(gss_msg);
597 dprintk("RPC: gss_create_upcall for uid %u result %d\n",
602 #define MSG_BUF_MAXSIZE 1024
605 gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
609 struct gss_upcall_msg *gss_msg;
610 struct rpc_inode *rpci = RPC_I(filp->f_dentry->d_inode);
611 struct gss_cl_ctx *ctx;
613 ssize_t err = -EFBIG;
615 if (mlen > MSG_BUF_MAXSIZE)
618 buf = kmalloc(mlen, GFP_NOFS);
623 if (copy_from_user(buf, src, mlen))
626 end = (const void *)((char *)buf + mlen);
627 p = simple_get_bytes(buf, end, &uid, sizeof(uid));
634 ctx = gss_alloc_context();
639 /* Find a matching upcall */
640 spin_lock(&rpci->pipe->lock);
641 gss_msg = __gss_find_upcall(rpci, uid);
642 if (gss_msg == NULL) {
643 spin_unlock(&rpci->pipe->lock);
646 list_del_init(&gss_msg->list);
647 spin_unlock(&rpci->pipe->lock);
649 p = gss_fill_context(p, end, ctx, gss_msg->auth->mech);
655 gss_msg->msg.errno = err;
662 gss_msg->msg.errno = -EAGAIN;
665 printk(KERN_CRIT "%s: bad return from "
666 "gss_fill_context: %zd\n", __func__, err);
669 goto err_release_msg;
671 gss_msg->ctx = gss_get_ctx(ctx);
675 spin_lock(&rpci->pipe->lock);
676 __gss_unhash_msg(gss_msg);
677 spin_unlock(&rpci->pipe->lock);
678 gss_release_msg(gss_msg);
684 dprintk("RPC: gss_pipe_downcall returning %Zd\n", err);
688 static int gss_pipe_open(struct inode *inode, int new_version)
692 spin_lock(&pipe_version_lock);
693 if (pipe_version < 0) {
694 /* First open of any gss pipe determines the version: */
695 pipe_version = new_version;
696 rpc_wake_up(&pipe_version_rpc_waitqueue);
697 wake_up(&pipe_version_waitqueue);
698 } else if (pipe_version != new_version) {
699 /* Trying to open a pipe of a different version */
703 atomic_inc(&pipe_users);
705 spin_unlock(&pipe_version_lock);
710 static int gss_pipe_open_v0(struct inode *inode)
712 return gss_pipe_open(inode, 0);
715 static int gss_pipe_open_v1(struct inode *inode)
717 return gss_pipe_open(inode, 1);
721 gss_pipe_release(struct inode *inode)
723 struct rpc_inode *rpci = RPC_I(inode);
724 struct gss_upcall_msg *gss_msg;
727 spin_lock(&rpci->pipe->lock);
728 list_for_each_entry(gss_msg, &rpci->pipe->in_downcall, list) {
730 if (!list_empty(&gss_msg->msg.list))
732 gss_msg->msg.errno = -EPIPE;
733 atomic_inc(&gss_msg->count);
734 __gss_unhash_msg(gss_msg);
735 spin_unlock(&rpci->pipe->lock);
736 gss_release_msg(gss_msg);
739 spin_unlock(&rpci->pipe->lock);
745 gss_pipe_destroy_msg(struct rpc_pipe_msg *msg)
747 struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg);
749 if (msg->errno < 0) {
750 dprintk("RPC: gss_pipe_destroy_msg releasing msg %p\n",
752 atomic_inc(&gss_msg->count);
753 gss_unhash_msg(gss_msg);
754 if (msg->errno == -ETIMEDOUT)
756 gss_release_msg(gss_msg);
761 * NOTE: we have the opportunity to use different
762 * parameters based on the input flavor (which must be a pseudoflavor)
764 static struct rpc_auth *
765 gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
767 struct gss_auth *gss_auth;
768 struct rpc_auth * auth;
769 int err = -ENOMEM; /* XXX? */
771 dprintk("RPC: creating GSS authenticator for client %p\n", clnt);
773 if (!try_module_get(THIS_MODULE))
775 if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL)))
777 gss_auth->client = clnt;
779 gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor);
780 if (!gss_auth->mech) {
781 printk(KERN_WARNING "%s: Pseudoflavor %d not found!\n",
785 gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor);
786 if (gss_auth->service == 0)
788 auth = &gss_auth->rpc_auth;
789 auth->au_cslack = GSS_CRED_SLACK >> 2;
790 auth->au_rslack = GSS_VERF_SLACK >> 2;
791 auth->au_ops = &authgss_ops;
792 auth->au_flavor = flavor;
793 atomic_set(&auth->au_count, 1);
794 kref_init(&gss_auth->kref);
797 * Note: if we created the old pipe first, then someone who
798 * examined the directory at the right moment might conclude
799 * that we supported only the old pipe. So we instead create
800 * the new pipe first.
802 gss_auth->dentry[1] = rpc_mkpipe(clnt->cl_path.dentry,
804 clnt, &gss_upcall_ops_v1,
805 RPC_PIPE_WAIT_FOR_OPEN);
806 if (IS_ERR(gss_auth->dentry[1])) {
807 err = PTR_ERR(gss_auth->dentry[1]);
811 gss_auth->dentry[0] = rpc_mkpipe(clnt->cl_path.dentry,
812 gss_auth->mech->gm_name,
813 clnt, &gss_upcall_ops_v0,
814 RPC_PIPE_WAIT_FOR_OPEN);
815 if (IS_ERR(gss_auth->dentry[0])) {
816 err = PTR_ERR(gss_auth->dentry[0]);
817 goto err_unlink_pipe_1;
819 err = rpcauth_init_credcache(auth);
821 goto err_unlink_pipe_0;
825 rpc_unlink(gss_auth->dentry[0]);
827 rpc_unlink(gss_auth->dentry[1]);
829 gss_mech_put(gss_auth->mech);
833 module_put(THIS_MODULE);
838 gss_free(struct gss_auth *gss_auth)
840 rpc_unlink(gss_auth->dentry[1]);
841 rpc_unlink(gss_auth->dentry[0]);
842 gss_mech_put(gss_auth->mech);
845 module_put(THIS_MODULE);
849 gss_free_callback(struct kref *kref)
851 struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref);
857 gss_destroy(struct rpc_auth *auth)
859 struct gss_auth *gss_auth;
861 dprintk("RPC: destroying GSS authenticator %p flavor %d\n",
862 auth, auth->au_flavor);
864 rpcauth_destroy_credcache(auth);
866 gss_auth = container_of(auth, struct gss_auth, rpc_auth);
867 kref_put(&gss_auth->kref, gss_free_callback);
871 * gss_destroying_context will cause the RPCSEC_GSS to send a NULL RPC call
872 * to the server with the GSS control procedure field set to
873 * RPC_GSS_PROC_DESTROY. This should normally cause the server to release
874 * all RPCSEC_GSS state associated with that context.
877 gss_destroying_context(struct rpc_cred *cred)
879 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
880 struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth);
881 struct rpc_task *task;
883 if (gss_cred->gc_ctx == NULL ||
884 test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0)
887 gss_cred->gc_ctx->gc_proc = RPC_GSS_PROC_DESTROY;
888 cred->cr_ops = &gss_nullops;
890 /* Take a reference to ensure the cred will be destroyed either
891 * by the RPC call or by the put_rpccred() below */
894 task = rpc_call_null(gss_auth->client, cred, RPC_TASK_ASYNC|RPC_TASK_SOFT);
902 /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure
903 * to create a new cred or context, so they check that things have been
904 * allocated before freeing them. */
906 gss_do_free_ctx(struct gss_cl_ctx *ctx)
908 dprintk("RPC: gss_free_ctx\n");
910 gss_delete_sec_context(&ctx->gc_gss_ctx);
911 kfree(ctx->gc_wire_ctx.data);
916 gss_free_ctx_callback(struct rcu_head *head)
918 struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu);
919 gss_do_free_ctx(ctx);
923 gss_free_ctx(struct gss_cl_ctx *ctx)
925 call_rcu(&ctx->gc_rcu, gss_free_ctx_callback);
929 gss_free_cred(struct gss_cred *gss_cred)
931 dprintk("RPC: gss_free_cred %p\n", gss_cred);
936 gss_free_cred_callback(struct rcu_head *head)
938 struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu);
939 gss_free_cred(gss_cred);
943 gss_destroy_nullcred(struct rpc_cred *cred)
945 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
946 struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth);
947 struct gss_cl_ctx *ctx = gss_cred->gc_ctx;
949 RCU_INIT_POINTER(gss_cred->gc_ctx, NULL);
950 call_rcu(&cred->cr_rcu, gss_free_cred_callback);
953 kref_put(&gss_auth->kref, gss_free_callback);
957 gss_destroy_cred(struct rpc_cred *cred)
960 if (gss_destroying_context(cred))
962 gss_destroy_nullcred(cred);
966 * Lookup RPCSEC_GSS cred for the current process
968 static struct rpc_cred *
969 gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
971 return rpcauth_lookup_credcache(auth, acred, flags);
974 static struct rpc_cred *
975 gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
977 struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth);
978 struct gss_cred *cred = NULL;
981 dprintk("RPC: gss_create_cred for uid %d, flavor %d\n",
982 acred->uid, auth->au_flavor);
984 if (!(cred = kzalloc(sizeof(*cred), GFP_NOFS)))
987 rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops);
989 * Note: in order to force a call to call_refresh(), we deliberately
990 * fail to flag the credential as RPCAUTH_CRED_UPTODATE.
992 cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW;
993 cred->gc_service = gss_auth->service;
994 cred->gc_principal = NULL;
995 if (acred->machine_cred)
996 cred->gc_principal = acred->principal;
997 kref_get(&gss_auth->kref);
998 return &cred->gc_base;
1001 dprintk("RPC: gss_create_cred failed with error %d\n", err);
1002 return ERR_PTR(err);
1006 gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred)
1008 struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth);
1009 struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base);
1013 err = gss_create_upcall(gss_auth, gss_cred);
1014 } while (err == -EAGAIN);
1019 gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags)
1021 struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base);
1023 if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags))
1025 /* Don't match with creds that have expired. */
1026 if (time_after(jiffies, gss_cred->gc_ctx->gc_expiry))
1028 if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags))
1031 if (acred->principal != NULL) {
1032 if (gss_cred->gc_principal == NULL)
1034 return strcmp(acred->principal, gss_cred->gc_principal) == 0;
1036 if (gss_cred->gc_principal != NULL)
1038 return rc->cr_uid == acred->uid;
1042 * Marshal credentials.
1043 * Maybe we should keep a cached credential for performance reasons.
1046 gss_marshal(struct rpc_task *task, __be32 *p)
1048 struct rpc_rqst *req = task->tk_rqstp;
1049 struct rpc_cred *cred = req->rq_cred;
1050 struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
1052 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1055 struct xdr_netobj mic;
1057 struct xdr_buf verf_buf;
1059 dprintk("RPC: %5u gss_marshal\n", task->tk_pid);
1061 *p++ = htonl(RPC_AUTH_GSS);
1064 spin_lock(&ctx->gc_seq_lock);
1065 req->rq_seqno = ctx->gc_seq++;
1066 spin_unlock(&ctx->gc_seq_lock);
1068 *p++ = htonl((u32) RPC_GSS_VERSION);
1069 *p++ = htonl((u32) ctx->gc_proc);
1070 *p++ = htonl((u32) req->rq_seqno);
1071 *p++ = htonl((u32) gss_cred->gc_service);
1072 p = xdr_encode_netobj(p, &ctx->gc_wire_ctx);
1073 *cred_len = htonl((p - (cred_len + 1)) << 2);
1075 /* We compute the checksum for the verifier over the xdr-encoded bytes
1076 * starting with the xid and ending at the end of the credential: */
1077 iov.iov_base = xprt_skip_transport_header(task->tk_xprt,
1078 req->rq_snd_buf.head[0].iov_base);
1079 iov.iov_len = (u8 *)p - (u8 *)iov.iov_base;
1080 xdr_buf_from_iov(&iov, &verf_buf);
1082 /* set verifier flavor*/
1083 *p++ = htonl(RPC_AUTH_GSS);
1085 mic.data = (u8 *)(p + 1);
1086 maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic);
1087 if (maj_stat == GSS_S_CONTEXT_EXPIRED) {
1088 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1089 } else if (maj_stat != 0) {
1090 printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat);
1093 p = xdr_encode_opaque(p, NULL, mic.len);
1101 static int gss_renew_cred(struct rpc_task *task)
1103 struct rpc_cred *oldcred = task->tk_rqstp->rq_cred;
1104 struct gss_cred *gss_cred = container_of(oldcred,
1107 struct rpc_auth *auth = oldcred->cr_auth;
1108 struct auth_cred acred = {
1109 .uid = oldcred->cr_uid,
1110 .principal = gss_cred->gc_principal,
1111 .machine_cred = (gss_cred->gc_principal != NULL ? 1 : 0),
1113 struct rpc_cred *new;
1115 new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW);
1117 return PTR_ERR(new);
1118 task->tk_rqstp->rq_cred = new;
1119 put_rpccred(oldcred);
1123 static int gss_cred_is_negative_entry(struct rpc_cred *cred)
1125 if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) {
1126 unsigned long now = jiffies;
1127 unsigned long begin, expire;
1128 struct gss_cred *gss_cred;
1130 gss_cred = container_of(cred, struct gss_cred, gc_base);
1131 begin = gss_cred->gc_upcall_timestamp;
1132 expire = begin + gss_expired_cred_retry_delay * HZ;
1134 if (time_in_range_open(now, begin, expire))
1141 * Refresh credentials. XXX - finish
1144 gss_refresh(struct rpc_task *task)
1146 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
1149 if (gss_cred_is_negative_entry(cred))
1150 return -EKEYEXPIRED;
1152 if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) &&
1153 !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) {
1154 ret = gss_renew_cred(task);
1157 cred = task->tk_rqstp->rq_cred;
1160 if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags))
1161 ret = gss_refresh_upcall(task);
1166 /* Dummy refresh routine: used only when destroying the context */
1168 gss_refresh_null(struct rpc_task *task)
1174 gss_validate(struct rpc_task *task, __be32 *p)
1176 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
1177 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1180 struct xdr_buf verf_buf;
1181 struct xdr_netobj mic;
1185 dprintk("RPC: %5u gss_validate\n", task->tk_pid);
1188 if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE)
1190 if (flav != RPC_AUTH_GSS)
1192 seq = htonl(task->tk_rqstp->rq_seqno);
1193 iov.iov_base = &seq;
1194 iov.iov_len = sizeof(seq);
1195 xdr_buf_from_iov(&iov, &verf_buf);
1199 maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic);
1200 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1201 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1203 dprintk("RPC: %5u gss_validate: gss_verify_mic returned "
1204 "error 0x%08x\n", task->tk_pid, maj_stat);
1207 /* We leave it to unwrap to calculate au_rslack. For now we just
1208 * calculate the length of the verifier: */
1209 cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2;
1211 dprintk("RPC: %5u gss_validate: gss_verify_mic succeeded.\n",
1213 return p + XDR_QUADLEN(len);
1216 dprintk("RPC: %5u gss_validate failed.\n", task->tk_pid);
1220 static void gss_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp,
1221 __be32 *p, void *obj)
1223 struct xdr_stream xdr;
1225 xdr_init_encode(&xdr, &rqstp->rq_snd_buf, p);
1226 encode(rqstp, &xdr, obj);
1230 gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1231 kxdreproc_t encode, struct rpc_rqst *rqstp,
1232 __be32 *p, void *obj)
1234 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
1235 struct xdr_buf integ_buf;
1236 __be32 *integ_len = NULL;
1237 struct xdr_netobj mic;
1245 offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base;
1246 *p++ = htonl(rqstp->rq_seqno);
1248 gss_wrap_req_encode(encode, rqstp, p, obj);
1250 if (xdr_buf_subsegment(snd_buf, &integ_buf,
1251 offset, snd_buf->len - offset))
1253 *integ_len = htonl(integ_buf.len);
1255 /* guess whether we're in the head or the tail: */
1256 if (snd_buf->page_len || snd_buf->tail[0].iov_len)
1257 iov = snd_buf->tail;
1259 iov = snd_buf->head;
1260 p = iov->iov_base + iov->iov_len;
1261 mic.data = (u8 *)(p + 1);
1263 maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic);
1264 status = -EIO; /* XXX? */
1265 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1266 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1269 q = xdr_encode_opaque(p, NULL, mic.len);
1271 offset = (u8 *)q - (u8 *)p;
1272 iov->iov_len += offset;
1273 snd_buf->len += offset;
1278 priv_release_snd_buf(struct rpc_rqst *rqstp)
1282 for (i=0; i < rqstp->rq_enc_pages_num; i++)
1283 __free_page(rqstp->rq_enc_pages[i]);
1284 kfree(rqstp->rq_enc_pages);
1288 alloc_enc_pages(struct rpc_rqst *rqstp)
1290 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
1293 if (snd_buf->page_len == 0) {
1294 rqstp->rq_enc_pages_num = 0;
1298 first = snd_buf->page_base >> PAGE_CACHE_SHIFT;
1299 last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT;
1300 rqstp->rq_enc_pages_num = last - first + 1 + 1;
1302 = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *),
1304 if (!rqstp->rq_enc_pages)
1306 for (i=0; i < rqstp->rq_enc_pages_num; i++) {
1307 rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS);
1308 if (rqstp->rq_enc_pages[i] == NULL)
1311 rqstp->rq_release_snd_buf = priv_release_snd_buf;
1314 rqstp->rq_enc_pages_num = i;
1315 priv_release_snd_buf(rqstp);
1321 gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1322 kxdreproc_t encode, struct rpc_rqst *rqstp,
1323 __be32 *p, void *obj)
1325 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
1330 struct page **inpages;
1337 offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base;
1338 *p++ = htonl(rqstp->rq_seqno);
1340 gss_wrap_req_encode(encode, rqstp, p, obj);
1342 status = alloc_enc_pages(rqstp);
1345 first = snd_buf->page_base >> PAGE_CACHE_SHIFT;
1346 inpages = snd_buf->pages + first;
1347 snd_buf->pages = rqstp->rq_enc_pages;
1348 snd_buf->page_base -= first << PAGE_CACHE_SHIFT;
1350 * Give the tail its own page, in case we need extra space in the
1351 * head when wrapping:
1353 * call_allocate() allocates twice the slack space required
1354 * by the authentication flavor to rq_callsize.
1355 * For GSS, slack is GSS_CRED_SLACK.
1357 if (snd_buf->page_len || snd_buf->tail[0].iov_len) {
1358 tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]);
1359 memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len);
1360 snd_buf->tail[0].iov_base = tmp;
1362 maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages);
1363 /* slack space should prevent this ever happening: */
1364 BUG_ON(snd_buf->len > snd_buf->buflen);
1366 /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was
1367 * done anyway, so it's safe to put the request on the wire: */
1368 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1369 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1373 *opaque_len = htonl(snd_buf->len - offset);
1374 /* guess whether we're in the head or the tail: */
1375 if (snd_buf->page_len || snd_buf->tail[0].iov_len)
1376 iov = snd_buf->tail;
1378 iov = snd_buf->head;
1379 p = iov->iov_base + iov->iov_len;
1380 pad = 3 - ((snd_buf->len - offset - 1) & 3);
1382 iov->iov_len += pad;
1383 snd_buf->len += pad;
1389 gss_wrap_req(struct rpc_task *task,
1390 kxdreproc_t encode, void *rqstp, __be32 *p, void *obj)
1392 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
1393 struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
1395 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1398 dprintk("RPC: %5u gss_wrap_req\n", task->tk_pid);
1399 if (ctx->gc_proc != RPC_GSS_PROC_DATA) {
1400 /* The spec seems a little ambiguous here, but I think that not
1401 * wrapping context destruction requests makes the most sense.
1403 gss_wrap_req_encode(encode, rqstp, p, obj);
1407 switch (gss_cred->gc_service) {
1408 case RPC_GSS_SVC_NONE:
1409 gss_wrap_req_encode(encode, rqstp, p, obj);
1412 case RPC_GSS_SVC_INTEGRITY:
1413 status = gss_wrap_req_integ(cred, ctx, encode, rqstp, p, obj);
1415 case RPC_GSS_SVC_PRIVACY:
1416 status = gss_wrap_req_priv(cred, ctx, encode, rqstp, p, obj);
1421 dprintk("RPC: %5u gss_wrap_req returning %d\n", task->tk_pid, status);
1426 gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1427 struct rpc_rqst *rqstp, __be32 **p)
1429 struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf;
1430 struct xdr_buf integ_buf;
1431 struct xdr_netobj mic;
1432 u32 data_offset, mic_offset;
1437 integ_len = ntohl(*(*p)++);
1440 data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base;
1441 mic_offset = integ_len + data_offset;
1442 if (mic_offset > rcv_buf->len)
1444 if (ntohl(*(*p)++) != rqstp->rq_seqno)
1447 if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset,
1448 mic_offset - data_offset))
1451 if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset))
1454 maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic);
1455 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1456 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1457 if (maj_stat != GSS_S_COMPLETE)
1463 gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1464 struct rpc_rqst *rqstp, __be32 **p)
1466 struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf;
1472 opaque_len = ntohl(*(*p)++);
1473 offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base;
1474 if (offset + opaque_len > rcv_buf->len)
1476 /* remove padding: */
1477 rcv_buf->len = offset + opaque_len;
1479 maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf);
1480 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1481 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1482 if (maj_stat != GSS_S_COMPLETE)
1484 if (ntohl(*(*p)++) != rqstp->rq_seqno)
1491 gss_unwrap_req_decode(kxdrdproc_t decode, struct rpc_rqst *rqstp,
1492 __be32 *p, void *obj)
1494 struct xdr_stream xdr;
1496 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
1497 return decode(rqstp, &xdr, obj);
1501 gss_unwrap_resp(struct rpc_task *task,
1502 kxdrdproc_t decode, void *rqstp, __be32 *p, void *obj)
1504 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
1505 struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
1507 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1509 struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head;
1510 int savedlen = head->iov_len;
1513 if (ctx->gc_proc != RPC_GSS_PROC_DATA)
1515 switch (gss_cred->gc_service) {
1516 case RPC_GSS_SVC_NONE:
1518 case RPC_GSS_SVC_INTEGRITY:
1519 status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p);
1523 case RPC_GSS_SVC_PRIVACY:
1524 status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p);
1529 /* take into account extra slack for integrity and privacy cases: */
1530 cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp)
1531 + (savedlen - head->iov_len);
1533 status = gss_unwrap_req_decode(decode, rqstp, p, obj);
1536 dprintk("RPC: %5u gss_unwrap_resp returning %d\n", task->tk_pid,
1541 static const struct rpc_authops authgss_ops = {
1542 .owner = THIS_MODULE,
1543 .au_flavor = RPC_AUTH_GSS,
1544 .au_name = "RPCSEC_GSS",
1545 .create = gss_create,
1546 .destroy = gss_destroy,
1547 .lookup_cred = gss_lookup_cred,
1548 .crcreate = gss_create_cred
1551 static const struct rpc_credops gss_credops = {
1552 .cr_name = "AUTH_GSS",
1553 .crdestroy = gss_destroy_cred,
1554 .cr_init = gss_cred_init,
1555 .crbind = rpcauth_generic_bind_cred,
1556 .crmatch = gss_match,
1557 .crmarshal = gss_marshal,
1558 .crrefresh = gss_refresh,
1559 .crvalidate = gss_validate,
1560 .crwrap_req = gss_wrap_req,
1561 .crunwrap_resp = gss_unwrap_resp,
1564 static const struct rpc_credops gss_nullops = {
1565 .cr_name = "AUTH_GSS",
1566 .crdestroy = gss_destroy_nullcred,
1567 .crbind = rpcauth_generic_bind_cred,
1568 .crmatch = gss_match,
1569 .crmarshal = gss_marshal,
1570 .crrefresh = gss_refresh_null,
1571 .crvalidate = gss_validate,
1572 .crwrap_req = gss_wrap_req,
1573 .crunwrap_resp = gss_unwrap_resp,
1576 static const struct rpc_pipe_ops gss_upcall_ops_v0 = {
1577 .upcall = rpc_pipe_generic_upcall,
1578 .downcall = gss_pipe_downcall,
1579 .destroy_msg = gss_pipe_destroy_msg,
1580 .open_pipe = gss_pipe_open_v0,
1581 .release_pipe = gss_pipe_release,
1584 static const struct rpc_pipe_ops gss_upcall_ops_v1 = {
1585 .upcall = rpc_pipe_generic_upcall,
1586 .downcall = gss_pipe_downcall,
1587 .destroy_msg = gss_pipe_destroy_msg,
1588 .open_pipe = gss_pipe_open_v1,
1589 .release_pipe = gss_pipe_release,
1593 * Initialize RPCSEC_GSS module
1595 static int __init init_rpcsec_gss(void)
1599 err = rpcauth_register(&authgss_ops);
1602 err = gss_svc_init();
1604 goto out_unregister;
1605 rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version");
1608 rpcauth_unregister(&authgss_ops);
1613 static void __exit exit_rpcsec_gss(void)
1616 rpcauth_unregister(&authgss_ops);
1617 rcu_barrier(); /* Wait for completion of call_rcu()'s */
1620 MODULE_LICENSE("GPL");
1621 module_param_named(expired_cred_retry_delay,
1622 gss_expired_cred_retry_delay,
1624 MODULE_PARM_DESC(expired_cred_retry_delay, "Timeout (in seconds) until "
1625 "the RPC engine retries an expired credential");
1627 module_init(init_rpcsec_gss)
1628 module_exit(exit_rpcsec_gss)