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 inode->i_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_INIT_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->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 inode *inode = &rpci->vfs_inode;
320 struct gss_upcall_msg *old;
322 spin_lock(&inode->i_lock);
323 old = __gss_find_upcall(rpci, gss_msg->uid);
325 atomic_inc(&gss_msg->count);
326 list_add(&gss_msg->list, &rpci->in_downcall);
329 spin_unlock(&inode->i_lock);
334 __gss_unhash_msg(struct gss_upcall_msg *gss_msg)
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 atomic_dec(&gss_msg->count);
343 gss_unhash_msg(struct gss_upcall_msg *gss_msg)
345 struct inode *inode = &gss_msg->inode->vfs_inode;
347 if (list_empty(&gss_msg->list))
349 spin_lock(&inode->i_lock);
350 if (!list_empty(&gss_msg->list))
351 __gss_unhash_msg(gss_msg);
352 spin_unlock(&inode->i_lock);
356 gss_handle_downcall_result(struct gss_cred *gss_cred, struct gss_upcall_msg *gss_msg)
358 switch (gss_msg->msg.errno) {
360 if (gss_msg->ctx == NULL)
362 clear_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags);
363 gss_cred_set_ctx(&gss_cred->gc_base, gss_msg->ctx);
366 set_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags);
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);
374 gss_upcall_callback(struct rpc_task *task)
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 inode *inode = &gss_msg->inode->vfs_inode;
381 spin_lock(&inode->i_lock);
382 gss_handle_downcall_result(gss_cred, gss_msg);
383 spin_unlock(&inode->i_lock);
384 task->tk_status = gss_msg->msg.errno;
385 gss_release_msg(gss_msg);
388 static void gss_encode_v0_msg(struct gss_upcall_msg *gss_msg)
390 gss_msg->msg.data = &gss_msg->uid;
391 gss_msg->msg.len = sizeof(gss_msg->uid);
394 static void gss_encode_v1_msg(struct gss_upcall_msg *gss_msg,
395 struct rpc_clnt *clnt,
396 const char *service_name)
398 struct gss_api_mech *mech = gss_msg->auth->mech;
399 char *p = gss_msg->databuf;
402 gss_msg->msg.len = sprintf(gss_msg->databuf, "mech=%s uid=%d ",
405 p += gss_msg->msg.len;
406 if (clnt->cl_principal) {
407 len = sprintf(p, "target=%s ", clnt->cl_principal);
409 gss_msg->msg.len += len;
411 if (service_name != NULL) {
412 len = sprintf(p, "service=%s ", service_name);
414 gss_msg->msg.len += len;
416 if (mech->gm_upcall_enctypes) {
417 len = sprintf(p, "enctypes=%s ", mech->gm_upcall_enctypes);
419 gss_msg->msg.len += len;
421 len = sprintf(p, "\n");
422 gss_msg->msg.len += len;
424 gss_msg->msg.data = gss_msg->databuf;
425 BUG_ON(gss_msg->msg.len > UPCALL_BUF_LEN);
428 static void gss_encode_msg(struct gss_upcall_msg *gss_msg,
429 struct rpc_clnt *clnt,
430 const char *service_name)
432 if (pipe_version == 0)
433 gss_encode_v0_msg(gss_msg);
434 else /* pipe_version == 1 */
435 gss_encode_v1_msg(gss_msg, clnt, service_name);
438 static struct gss_upcall_msg *
439 gss_alloc_msg(struct gss_auth *gss_auth, struct rpc_clnt *clnt,
440 uid_t uid, const char *service_name)
442 struct gss_upcall_msg *gss_msg;
445 gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS);
447 return ERR_PTR(-ENOMEM);
448 vers = get_pipe_version();
451 return ERR_PTR(vers);
453 gss_msg->inode = RPC_I(gss_auth->dentry[vers]->d_inode);
454 INIT_LIST_HEAD(&gss_msg->list);
455 rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq");
456 init_waitqueue_head(&gss_msg->waitqueue);
457 atomic_set(&gss_msg->count, 1);
459 gss_msg->auth = gss_auth;
460 gss_encode_msg(gss_msg, clnt, service_name);
464 static struct gss_upcall_msg *
465 gss_setup_upcall(struct rpc_clnt *clnt, struct gss_auth *gss_auth, struct rpc_cred *cred)
467 struct gss_cred *gss_cred = container_of(cred,
468 struct gss_cred, gc_base);
469 struct gss_upcall_msg *gss_new, *gss_msg;
470 uid_t uid = cred->cr_uid;
472 gss_new = gss_alloc_msg(gss_auth, clnt, uid, gss_cred->gc_principal);
475 gss_msg = gss_add_msg(gss_new);
476 if (gss_msg == gss_new) {
477 struct inode *inode = &gss_new->inode->vfs_inode;
478 int res = rpc_queue_upcall(inode, &gss_new->msg);
480 gss_unhash_msg(gss_new);
481 gss_msg = ERR_PTR(res);
484 gss_release_msg(gss_new);
488 static void warn_gssd(void)
490 static unsigned long ratelimit;
491 unsigned long now = jiffies;
493 if (time_after(now, ratelimit)) {
494 printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n"
495 "Please check user daemon is running.\n");
496 ratelimit = now + 15*HZ;
501 gss_refresh_upcall(struct rpc_task *task)
503 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
504 struct gss_auth *gss_auth = container_of(cred->cr_auth,
505 struct gss_auth, rpc_auth);
506 struct gss_cred *gss_cred = container_of(cred,
507 struct gss_cred, gc_base);
508 struct gss_upcall_msg *gss_msg;
512 dprintk("RPC: %5u gss_refresh_upcall for uid %u\n", task->tk_pid,
514 gss_msg = gss_setup_upcall(task->tk_client, gss_auth, cred);
515 if (PTR_ERR(gss_msg) == -EAGAIN) {
516 /* XXX: warning on the first, under the assumption we
517 * shouldn't normally hit this case on a refresh. */
519 task->tk_timeout = 15*HZ;
520 rpc_sleep_on(&pipe_version_rpc_waitqueue, task, NULL);
523 if (IS_ERR(gss_msg)) {
524 err = PTR_ERR(gss_msg);
527 inode = &gss_msg->inode->vfs_inode;
528 spin_lock(&inode->i_lock);
529 if (gss_cred->gc_upcall != NULL)
530 rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL);
531 else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) {
532 task->tk_timeout = 0;
533 gss_cred->gc_upcall = gss_msg;
534 /* gss_upcall_callback will release the reference to gss_upcall_msg */
535 atomic_inc(&gss_msg->count);
536 rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback);
538 gss_handle_downcall_result(gss_cred, gss_msg);
539 err = gss_msg->msg.errno;
541 spin_unlock(&inode->i_lock);
542 gss_release_msg(gss_msg);
544 dprintk("RPC: %5u gss_refresh_upcall for uid %u result %d\n",
545 task->tk_pid, cred->cr_uid, err);
550 gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred)
553 struct rpc_cred *cred = &gss_cred->gc_base;
554 struct gss_upcall_msg *gss_msg;
558 dprintk("RPC: gss_upcall for uid %u\n", cred->cr_uid);
560 gss_msg = gss_setup_upcall(gss_auth->client, gss_auth, cred);
561 if (PTR_ERR(gss_msg) == -EAGAIN) {
562 err = wait_event_interruptible_timeout(pipe_version_waitqueue,
563 pipe_version >= 0, 15*HZ);
564 if (pipe_version < 0) {
572 if (IS_ERR(gss_msg)) {
573 err = PTR_ERR(gss_msg);
576 inode = &gss_msg->inode->vfs_inode;
578 prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_KILLABLE);
579 spin_lock(&inode->i_lock);
580 if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) {
583 spin_unlock(&inode->i_lock);
584 if (fatal_signal_pending(current)) {
591 gss_cred_set_ctx(cred, gss_msg->ctx);
593 err = gss_msg->msg.errno;
594 spin_unlock(&inode->i_lock);
596 finish_wait(&gss_msg->waitqueue, &wait);
597 gss_release_msg(gss_msg);
599 dprintk("RPC: gss_create_upcall for uid %u result %d\n",
604 #define MSG_BUF_MAXSIZE 1024
607 gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
611 struct gss_upcall_msg *gss_msg;
612 struct inode *inode = filp->f_path.dentry->d_inode;
613 struct gss_cl_ctx *ctx;
615 ssize_t err = -EFBIG;
617 if (mlen > MSG_BUF_MAXSIZE)
620 buf = kmalloc(mlen, GFP_NOFS);
625 if (copy_from_user(buf, src, mlen))
628 end = (const void *)((char *)buf + mlen);
629 p = simple_get_bytes(buf, end, &uid, sizeof(uid));
636 ctx = gss_alloc_context();
641 /* Find a matching upcall */
642 spin_lock(&inode->i_lock);
643 gss_msg = __gss_find_upcall(RPC_I(inode), uid);
644 if (gss_msg == NULL) {
645 spin_unlock(&inode->i_lock);
648 list_del_init(&gss_msg->list);
649 spin_unlock(&inode->i_lock);
651 p = gss_fill_context(p, end, ctx, gss_msg->auth->mech);
657 gss_msg->msg.errno = err;
664 gss_msg->msg.errno = -EAGAIN;
667 printk(KERN_CRIT "%s: bad return from "
668 "gss_fill_context: %zd\n", __func__, err);
671 goto err_release_msg;
673 gss_msg->ctx = gss_get_ctx(ctx);
677 spin_lock(&inode->i_lock);
678 __gss_unhash_msg(gss_msg);
679 spin_unlock(&inode->i_lock);
680 gss_release_msg(gss_msg);
686 dprintk("RPC: gss_pipe_downcall returning %Zd\n", err);
690 static int gss_pipe_open(struct inode *inode, int new_version)
694 spin_lock(&pipe_version_lock);
695 if (pipe_version < 0) {
696 /* First open of any gss pipe determines the version: */
697 pipe_version = new_version;
698 rpc_wake_up(&pipe_version_rpc_waitqueue);
699 wake_up(&pipe_version_waitqueue);
700 } else if (pipe_version != new_version) {
701 /* Trying to open a pipe of a different version */
705 atomic_inc(&pipe_users);
707 spin_unlock(&pipe_version_lock);
712 static int gss_pipe_open_v0(struct inode *inode)
714 return gss_pipe_open(inode, 0);
717 static int gss_pipe_open_v1(struct inode *inode)
719 return gss_pipe_open(inode, 1);
723 gss_pipe_release(struct inode *inode)
725 struct rpc_inode *rpci = RPC_I(inode);
726 struct gss_upcall_msg *gss_msg;
729 spin_lock(&inode->i_lock);
730 list_for_each_entry(gss_msg, &rpci->in_downcall, list) {
732 if (!list_empty(&gss_msg->msg.list))
734 gss_msg->msg.errno = -EPIPE;
735 atomic_inc(&gss_msg->count);
736 __gss_unhash_msg(gss_msg);
737 spin_unlock(&inode->i_lock);
738 gss_release_msg(gss_msg);
741 spin_unlock(&inode->i_lock);
747 gss_pipe_destroy_msg(struct rpc_pipe_msg *msg)
749 struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg);
751 if (msg->errno < 0) {
752 dprintk("RPC: gss_pipe_destroy_msg releasing msg %p\n",
754 atomic_inc(&gss_msg->count);
755 gss_unhash_msg(gss_msg);
756 if (msg->errno == -ETIMEDOUT)
758 gss_release_msg(gss_msg);
763 * NOTE: we have the opportunity to use different
764 * parameters based on the input flavor (which must be a pseudoflavor)
766 static struct rpc_auth *
767 gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
769 struct gss_auth *gss_auth;
770 struct rpc_auth * auth;
771 int err = -ENOMEM; /* XXX? */
773 dprintk("RPC: creating GSS authenticator for client %p\n", clnt);
775 if (!try_module_get(THIS_MODULE))
777 if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL)))
779 gss_auth->client = clnt;
781 gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor);
782 if (!gss_auth->mech) {
783 printk(KERN_WARNING "%s: Pseudoflavor %d not found!\n",
787 gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor);
788 if (gss_auth->service == 0)
790 auth = &gss_auth->rpc_auth;
791 auth->au_cslack = GSS_CRED_SLACK >> 2;
792 auth->au_rslack = GSS_VERF_SLACK >> 2;
793 auth->au_ops = &authgss_ops;
794 auth->au_flavor = flavor;
795 atomic_set(&auth->au_count, 1);
796 kref_init(&gss_auth->kref);
799 * Note: if we created the old pipe first, then someone who
800 * examined the directory at the right moment might conclude
801 * that we supported only the old pipe. So we instead create
802 * the new pipe first.
804 gss_auth->dentry[1] = rpc_mkpipe(clnt->cl_path.dentry,
806 clnt, &gss_upcall_ops_v1,
807 RPC_PIPE_WAIT_FOR_OPEN);
808 if (IS_ERR(gss_auth->dentry[1])) {
809 err = PTR_ERR(gss_auth->dentry[1]);
813 gss_auth->dentry[0] = rpc_mkpipe(clnt->cl_path.dentry,
814 gss_auth->mech->gm_name,
815 clnt, &gss_upcall_ops_v0,
816 RPC_PIPE_WAIT_FOR_OPEN);
817 if (IS_ERR(gss_auth->dentry[0])) {
818 err = PTR_ERR(gss_auth->dentry[0]);
819 goto err_unlink_pipe_1;
821 err = rpcauth_init_credcache(auth);
823 goto err_unlink_pipe_0;
827 rpc_unlink(gss_auth->dentry[0]);
829 rpc_unlink(gss_auth->dentry[1]);
831 gss_mech_put(gss_auth->mech);
835 module_put(THIS_MODULE);
840 gss_free(struct gss_auth *gss_auth)
842 rpc_unlink(gss_auth->dentry[1]);
843 rpc_unlink(gss_auth->dentry[0]);
844 gss_mech_put(gss_auth->mech);
847 module_put(THIS_MODULE);
851 gss_free_callback(struct kref *kref)
853 struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref);
859 gss_destroy(struct rpc_auth *auth)
861 struct gss_auth *gss_auth;
863 dprintk("RPC: destroying GSS authenticator %p flavor %d\n",
864 auth, auth->au_flavor);
866 rpcauth_destroy_credcache(auth);
868 gss_auth = container_of(auth, struct gss_auth, rpc_auth);
869 kref_put(&gss_auth->kref, gss_free_callback);
873 * gss_destroying_context will cause the RPCSEC_GSS to send a NULL RPC call
874 * to the server with the GSS control procedure field set to
875 * RPC_GSS_PROC_DESTROY. This should normally cause the server to release
876 * all RPCSEC_GSS state associated with that context.
879 gss_destroying_context(struct rpc_cred *cred)
881 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
882 struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth);
883 struct rpc_task *task;
885 if (gss_cred->gc_ctx == NULL ||
886 test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0)
889 gss_cred->gc_ctx->gc_proc = RPC_GSS_PROC_DESTROY;
890 cred->cr_ops = &gss_nullops;
892 /* Take a reference to ensure the cred will be destroyed either
893 * by the RPC call or by the put_rpccred() below */
896 task = rpc_call_null(gss_auth->client, cred, RPC_TASK_ASYNC|RPC_TASK_SOFT);
904 /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure
905 * to create a new cred or context, so they check that things have been
906 * allocated before freeing them. */
908 gss_do_free_ctx(struct gss_cl_ctx *ctx)
910 dprintk("RPC: gss_free_ctx\n");
912 gss_delete_sec_context(&ctx->gc_gss_ctx);
913 kfree(ctx->gc_wire_ctx.data);
918 gss_free_ctx_callback(struct rcu_head *head)
920 struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu);
921 gss_do_free_ctx(ctx);
925 gss_free_ctx(struct gss_cl_ctx *ctx)
927 call_rcu(&ctx->gc_rcu, gss_free_ctx_callback);
931 gss_free_cred(struct gss_cred *gss_cred)
933 dprintk("RPC: gss_free_cred %p\n", gss_cred);
938 gss_free_cred_callback(struct rcu_head *head)
940 struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu);
941 gss_free_cred(gss_cred);
945 gss_destroy_nullcred(struct rpc_cred *cred)
947 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
948 struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth);
949 struct gss_cl_ctx *ctx = gss_cred->gc_ctx;
951 RCU_INIT_POINTER(gss_cred->gc_ctx, NULL);
952 call_rcu(&cred->cr_rcu, gss_free_cred_callback);
955 kref_put(&gss_auth->kref, gss_free_callback);
959 gss_destroy_cred(struct rpc_cred *cred)
962 if (gss_destroying_context(cred))
964 gss_destroy_nullcred(cred);
968 * Lookup RPCSEC_GSS cred for the current process
970 static struct rpc_cred *
971 gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
973 return rpcauth_lookup_credcache(auth, acred, flags);
976 static struct rpc_cred *
977 gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
979 struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth);
980 struct gss_cred *cred = NULL;
983 dprintk("RPC: gss_create_cred for uid %d, flavor %d\n",
984 acred->uid, auth->au_flavor);
986 if (!(cred = kzalloc(sizeof(*cred), GFP_NOFS)))
989 rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops);
991 * Note: in order to force a call to call_refresh(), we deliberately
992 * fail to flag the credential as RPCAUTH_CRED_UPTODATE.
994 cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW;
995 cred->gc_service = gss_auth->service;
996 cred->gc_principal = NULL;
997 if (acred->machine_cred)
998 cred->gc_principal = acred->principal;
999 kref_get(&gss_auth->kref);
1000 return &cred->gc_base;
1003 dprintk("RPC: gss_create_cred failed with error %d\n", err);
1004 return ERR_PTR(err);
1008 gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred)
1010 struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth);
1011 struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base);
1015 err = gss_create_upcall(gss_auth, gss_cred);
1016 } while (err == -EAGAIN);
1021 gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags)
1023 struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base);
1025 if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags))
1027 /* Don't match with creds that have expired. */
1028 if (time_after(jiffies, gss_cred->gc_ctx->gc_expiry))
1030 if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags))
1033 if (acred->principal != NULL) {
1034 if (gss_cred->gc_principal == NULL)
1036 return strcmp(acred->principal, gss_cred->gc_principal) == 0;
1038 if (gss_cred->gc_principal != NULL)
1040 return rc->cr_uid == acred->uid;
1044 * Marshal credentials.
1045 * Maybe we should keep a cached credential for performance reasons.
1048 gss_marshal(struct rpc_task *task, __be32 *p)
1050 struct rpc_rqst *req = task->tk_rqstp;
1051 struct rpc_cred *cred = req->rq_cred;
1052 struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
1054 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1057 struct xdr_netobj mic;
1059 struct xdr_buf verf_buf;
1061 dprintk("RPC: %5u gss_marshal\n", task->tk_pid);
1063 *p++ = htonl(RPC_AUTH_GSS);
1066 spin_lock(&ctx->gc_seq_lock);
1067 req->rq_seqno = ctx->gc_seq++;
1068 spin_unlock(&ctx->gc_seq_lock);
1070 *p++ = htonl((u32) RPC_GSS_VERSION);
1071 *p++ = htonl((u32) ctx->gc_proc);
1072 *p++ = htonl((u32) req->rq_seqno);
1073 *p++ = htonl((u32) gss_cred->gc_service);
1074 p = xdr_encode_netobj(p, &ctx->gc_wire_ctx);
1075 *cred_len = htonl((p - (cred_len + 1)) << 2);
1077 /* We compute the checksum for the verifier over the xdr-encoded bytes
1078 * starting with the xid and ending at the end of the credential: */
1079 iov.iov_base = xprt_skip_transport_header(task->tk_xprt,
1080 req->rq_snd_buf.head[0].iov_base);
1081 iov.iov_len = (u8 *)p - (u8 *)iov.iov_base;
1082 xdr_buf_from_iov(&iov, &verf_buf);
1084 /* set verifier flavor*/
1085 *p++ = htonl(RPC_AUTH_GSS);
1087 mic.data = (u8 *)(p + 1);
1088 maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic);
1089 if (maj_stat == GSS_S_CONTEXT_EXPIRED) {
1090 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1091 } else if (maj_stat != 0) {
1092 printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat);
1095 p = xdr_encode_opaque(p, NULL, mic.len);
1103 static int gss_renew_cred(struct rpc_task *task)
1105 struct rpc_cred *oldcred = task->tk_rqstp->rq_cred;
1106 struct gss_cred *gss_cred = container_of(oldcred,
1109 struct rpc_auth *auth = oldcred->cr_auth;
1110 struct auth_cred acred = {
1111 .uid = oldcred->cr_uid,
1112 .principal = gss_cred->gc_principal,
1113 .machine_cred = (gss_cred->gc_principal != NULL ? 1 : 0),
1115 struct rpc_cred *new;
1117 new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW);
1119 return PTR_ERR(new);
1120 task->tk_rqstp->rq_cred = new;
1121 put_rpccred(oldcred);
1125 static int gss_cred_is_negative_entry(struct rpc_cred *cred)
1127 if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) {
1128 unsigned long now = jiffies;
1129 unsigned long begin, expire;
1130 struct gss_cred *gss_cred;
1132 gss_cred = container_of(cred, struct gss_cred, gc_base);
1133 begin = gss_cred->gc_upcall_timestamp;
1134 expire = begin + gss_expired_cred_retry_delay * HZ;
1136 if (time_in_range_open(now, begin, expire))
1143 * Refresh credentials. XXX - finish
1146 gss_refresh(struct rpc_task *task)
1148 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
1151 if (gss_cred_is_negative_entry(cred))
1152 return -EKEYEXPIRED;
1154 if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) &&
1155 !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) {
1156 ret = gss_renew_cred(task);
1159 cred = task->tk_rqstp->rq_cred;
1162 if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags))
1163 ret = gss_refresh_upcall(task);
1168 /* Dummy refresh routine: used only when destroying the context */
1170 gss_refresh_null(struct rpc_task *task)
1176 gss_validate(struct rpc_task *task, __be32 *p)
1178 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
1179 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1182 struct xdr_buf verf_buf;
1183 struct xdr_netobj mic;
1187 dprintk("RPC: %5u gss_validate\n", task->tk_pid);
1190 if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE)
1192 if (flav != RPC_AUTH_GSS)
1194 seq = htonl(task->tk_rqstp->rq_seqno);
1195 iov.iov_base = &seq;
1196 iov.iov_len = sizeof(seq);
1197 xdr_buf_from_iov(&iov, &verf_buf);
1201 maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic);
1202 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1203 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1205 dprintk("RPC: %5u gss_validate: gss_verify_mic returned "
1206 "error 0x%08x\n", task->tk_pid, maj_stat);
1209 /* We leave it to unwrap to calculate au_rslack. For now we just
1210 * calculate the length of the verifier: */
1211 cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2;
1213 dprintk("RPC: %5u gss_validate: gss_verify_mic succeeded.\n",
1215 return p + XDR_QUADLEN(len);
1218 dprintk("RPC: %5u gss_validate failed.\n", task->tk_pid);
1222 static void gss_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp,
1223 __be32 *p, void *obj)
1225 struct xdr_stream xdr;
1227 xdr_init_encode(&xdr, &rqstp->rq_snd_buf, p);
1228 encode(rqstp, &xdr, obj);
1232 gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1233 kxdreproc_t encode, struct rpc_rqst *rqstp,
1234 __be32 *p, void *obj)
1236 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
1237 struct xdr_buf integ_buf;
1238 __be32 *integ_len = NULL;
1239 struct xdr_netobj mic;
1247 offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base;
1248 *p++ = htonl(rqstp->rq_seqno);
1250 gss_wrap_req_encode(encode, rqstp, p, obj);
1252 if (xdr_buf_subsegment(snd_buf, &integ_buf,
1253 offset, snd_buf->len - offset))
1255 *integ_len = htonl(integ_buf.len);
1257 /* guess whether we're in the head or the tail: */
1258 if (snd_buf->page_len || snd_buf->tail[0].iov_len)
1259 iov = snd_buf->tail;
1261 iov = snd_buf->head;
1262 p = iov->iov_base + iov->iov_len;
1263 mic.data = (u8 *)(p + 1);
1265 maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic);
1266 status = -EIO; /* XXX? */
1267 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1268 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1271 q = xdr_encode_opaque(p, NULL, mic.len);
1273 offset = (u8 *)q - (u8 *)p;
1274 iov->iov_len += offset;
1275 snd_buf->len += offset;
1280 priv_release_snd_buf(struct rpc_rqst *rqstp)
1284 for (i=0; i < rqstp->rq_enc_pages_num; i++)
1285 __free_page(rqstp->rq_enc_pages[i]);
1286 kfree(rqstp->rq_enc_pages);
1290 alloc_enc_pages(struct rpc_rqst *rqstp)
1292 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
1295 if (snd_buf->page_len == 0) {
1296 rqstp->rq_enc_pages_num = 0;
1300 first = snd_buf->page_base >> PAGE_CACHE_SHIFT;
1301 last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT;
1302 rqstp->rq_enc_pages_num = last - first + 1 + 1;
1304 = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *),
1306 if (!rqstp->rq_enc_pages)
1308 for (i=0; i < rqstp->rq_enc_pages_num; i++) {
1309 rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS);
1310 if (rqstp->rq_enc_pages[i] == NULL)
1313 rqstp->rq_release_snd_buf = priv_release_snd_buf;
1316 rqstp->rq_enc_pages_num = i;
1317 priv_release_snd_buf(rqstp);
1323 gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1324 kxdreproc_t encode, struct rpc_rqst *rqstp,
1325 __be32 *p, void *obj)
1327 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
1332 struct page **inpages;
1339 offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base;
1340 *p++ = htonl(rqstp->rq_seqno);
1342 gss_wrap_req_encode(encode, rqstp, p, obj);
1344 status = alloc_enc_pages(rqstp);
1347 first = snd_buf->page_base >> PAGE_CACHE_SHIFT;
1348 inpages = snd_buf->pages + first;
1349 snd_buf->pages = rqstp->rq_enc_pages;
1350 snd_buf->page_base -= first << PAGE_CACHE_SHIFT;
1352 * Give the tail its own page, in case we need extra space in the
1353 * head when wrapping:
1355 * call_allocate() allocates twice the slack space required
1356 * by the authentication flavor to rq_callsize.
1357 * For GSS, slack is GSS_CRED_SLACK.
1359 if (snd_buf->page_len || snd_buf->tail[0].iov_len) {
1360 tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]);
1361 memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len);
1362 snd_buf->tail[0].iov_base = tmp;
1364 maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages);
1365 /* slack space should prevent this ever happening: */
1366 BUG_ON(snd_buf->len > snd_buf->buflen);
1368 /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was
1369 * done anyway, so it's safe to put the request on the wire: */
1370 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1371 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1375 *opaque_len = htonl(snd_buf->len - offset);
1376 /* guess whether we're in the head or the tail: */
1377 if (snd_buf->page_len || snd_buf->tail[0].iov_len)
1378 iov = snd_buf->tail;
1380 iov = snd_buf->head;
1381 p = iov->iov_base + iov->iov_len;
1382 pad = 3 - ((snd_buf->len - offset - 1) & 3);
1384 iov->iov_len += pad;
1385 snd_buf->len += pad;
1391 gss_wrap_req(struct rpc_task *task,
1392 kxdreproc_t encode, void *rqstp, __be32 *p, void *obj)
1394 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
1395 struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
1397 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1400 dprintk("RPC: %5u gss_wrap_req\n", task->tk_pid);
1401 if (ctx->gc_proc != RPC_GSS_PROC_DATA) {
1402 /* The spec seems a little ambiguous here, but I think that not
1403 * wrapping context destruction requests makes the most sense.
1405 gss_wrap_req_encode(encode, rqstp, p, obj);
1409 switch (gss_cred->gc_service) {
1410 case RPC_GSS_SVC_NONE:
1411 gss_wrap_req_encode(encode, rqstp, p, obj);
1414 case RPC_GSS_SVC_INTEGRITY:
1415 status = gss_wrap_req_integ(cred, ctx, encode, rqstp, p, obj);
1417 case RPC_GSS_SVC_PRIVACY:
1418 status = gss_wrap_req_priv(cred, ctx, encode, rqstp, p, obj);
1423 dprintk("RPC: %5u gss_wrap_req returning %d\n", task->tk_pid, status);
1428 gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1429 struct rpc_rqst *rqstp, __be32 **p)
1431 struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf;
1432 struct xdr_buf integ_buf;
1433 struct xdr_netobj mic;
1434 u32 data_offset, mic_offset;
1439 integ_len = ntohl(*(*p)++);
1442 data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base;
1443 mic_offset = integ_len + data_offset;
1444 if (mic_offset > rcv_buf->len)
1446 if (ntohl(*(*p)++) != rqstp->rq_seqno)
1449 if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset,
1450 mic_offset - data_offset))
1453 if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset))
1456 maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic);
1457 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1458 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1459 if (maj_stat != GSS_S_COMPLETE)
1465 gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1466 struct rpc_rqst *rqstp, __be32 **p)
1468 struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf;
1474 opaque_len = ntohl(*(*p)++);
1475 offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base;
1476 if (offset + opaque_len > rcv_buf->len)
1478 /* remove padding: */
1479 rcv_buf->len = offset + opaque_len;
1481 maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf);
1482 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1483 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1484 if (maj_stat != GSS_S_COMPLETE)
1486 if (ntohl(*(*p)++) != rqstp->rq_seqno)
1493 gss_unwrap_req_decode(kxdrdproc_t decode, struct rpc_rqst *rqstp,
1494 __be32 *p, void *obj)
1496 struct xdr_stream xdr;
1498 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
1499 return decode(rqstp, &xdr, obj);
1503 gss_unwrap_resp(struct rpc_task *task,
1504 kxdrdproc_t decode, void *rqstp, __be32 *p, void *obj)
1506 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
1507 struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
1509 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1511 struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head;
1512 int savedlen = head->iov_len;
1515 if (ctx->gc_proc != RPC_GSS_PROC_DATA)
1517 switch (gss_cred->gc_service) {
1518 case RPC_GSS_SVC_NONE:
1520 case RPC_GSS_SVC_INTEGRITY:
1521 status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p);
1525 case RPC_GSS_SVC_PRIVACY:
1526 status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p);
1531 /* take into account extra slack for integrity and privacy cases: */
1532 cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp)
1533 + (savedlen - head->iov_len);
1535 status = gss_unwrap_req_decode(decode, rqstp, p, obj);
1538 dprintk("RPC: %5u gss_unwrap_resp returning %d\n", task->tk_pid,
1543 static const struct rpc_authops authgss_ops = {
1544 .owner = THIS_MODULE,
1545 .au_flavor = RPC_AUTH_GSS,
1546 .au_name = "RPCSEC_GSS",
1547 .create = gss_create,
1548 .destroy = gss_destroy,
1549 .lookup_cred = gss_lookup_cred,
1550 .crcreate = gss_create_cred
1553 static const struct rpc_credops gss_credops = {
1554 .cr_name = "AUTH_GSS",
1555 .crdestroy = gss_destroy_cred,
1556 .cr_init = gss_cred_init,
1557 .crbind = rpcauth_generic_bind_cred,
1558 .crmatch = gss_match,
1559 .crmarshal = gss_marshal,
1560 .crrefresh = gss_refresh,
1561 .crvalidate = gss_validate,
1562 .crwrap_req = gss_wrap_req,
1563 .crunwrap_resp = gss_unwrap_resp,
1566 static const struct rpc_credops gss_nullops = {
1567 .cr_name = "AUTH_GSS",
1568 .crdestroy = gss_destroy_nullcred,
1569 .crbind = rpcauth_generic_bind_cred,
1570 .crmatch = gss_match,
1571 .crmarshal = gss_marshal,
1572 .crrefresh = gss_refresh_null,
1573 .crvalidate = gss_validate,
1574 .crwrap_req = gss_wrap_req,
1575 .crunwrap_resp = gss_unwrap_resp,
1578 static const struct rpc_pipe_ops gss_upcall_ops_v0 = {
1579 .upcall = rpc_pipe_generic_upcall,
1580 .downcall = gss_pipe_downcall,
1581 .destroy_msg = gss_pipe_destroy_msg,
1582 .open_pipe = gss_pipe_open_v0,
1583 .release_pipe = gss_pipe_release,
1586 static const struct rpc_pipe_ops gss_upcall_ops_v1 = {
1587 .upcall = rpc_pipe_generic_upcall,
1588 .downcall = gss_pipe_downcall,
1589 .destroy_msg = gss_pipe_destroy_msg,
1590 .open_pipe = gss_pipe_open_v1,
1591 .release_pipe = gss_pipe_release,
1595 * Initialize RPCSEC_GSS module
1597 static int __init init_rpcsec_gss(void)
1601 err = rpcauth_register(&authgss_ops);
1604 err = gss_svc_init();
1606 goto out_unregister;
1607 rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version");
1610 rpcauth_unregister(&authgss_ops);
1615 static void __exit exit_rpcsec_gss(void)
1618 rpcauth_unregister(&authgss_ops);
1619 rcu_barrier(); /* Wait for completion of call_rcu()'s */
1622 MODULE_LICENSE("GPL");
1623 module_param_named(expired_cred_retry_delay,
1624 gss_expired_cred_retry_delay,
1626 MODULE_PARM_DESC(expired_cred_retry_delay, "Timeout (in seconds) until "
1627 "the RPC engine retries an expired credential");
1629 module_init(init_rpcsec_gss)
1630 module_exit(exit_rpcsec_gss)