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_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->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, int machine_cred)
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;
411 len = sprintf(p, "service=* ");
413 gss_msg->msg.len += len;
414 } else if (!strcmp(clnt->cl_program->name, "nfs4_cb")) {
415 len = sprintf(p, "service=nfs ");
417 gss_msg->msg.len += len;
419 if (mech->gm_upcall_enctypes) {
420 len = sprintf(p, mech->gm_upcall_enctypes);
422 gss_msg->msg.len += len;
424 len = sprintf(p, "\n");
425 gss_msg->msg.len += len;
427 gss_msg->msg.data = gss_msg->databuf;
428 BUG_ON(gss_msg->msg.len > UPCALL_BUF_LEN);
431 static void gss_encode_msg(struct gss_upcall_msg *gss_msg,
432 struct rpc_clnt *clnt, int machine_cred)
434 if (pipe_version == 0)
435 gss_encode_v0_msg(gss_msg);
436 else /* pipe_version == 1 */
437 gss_encode_v1_msg(gss_msg, clnt, machine_cred);
440 static inline struct gss_upcall_msg *
441 gss_alloc_msg(struct gss_auth *gss_auth, uid_t uid, struct rpc_clnt *clnt,
444 struct gss_upcall_msg *gss_msg;
447 gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS);
449 return ERR_PTR(-ENOMEM);
450 vers = get_pipe_version();
453 return ERR_PTR(vers);
455 gss_msg->inode = RPC_I(gss_auth->dentry[vers]->d_inode);
456 INIT_LIST_HEAD(&gss_msg->list);
457 rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq");
458 init_waitqueue_head(&gss_msg->waitqueue);
459 atomic_set(&gss_msg->count, 1);
461 gss_msg->auth = gss_auth;
462 gss_encode_msg(gss_msg, clnt, machine_cred);
466 static struct gss_upcall_msg *
467 gss_setup_upcall(struct rpc_clnt *clnt, struct gss_auth *gss_auth, struct rpc_cred *cred)
469 struct gss_cred *gss_cred = container_of(cred,
470 struct gss_cred, gc_base);
471 struct gss_upcall_msg *gss_new, *gss_msg;
472 uid_t uid = cred->cr_uid;
474 gss_new = gss_alloc_msg(gss_auth, uid, clnt, gss_cred->gc_machine_cred);
477 gss_msg = gss_add_msg(gss_new);
478 if (gss_msg == gss_new) {
479 struct inode *inode = &gss_new->inode->vfs_inode;
480 int res = rpc_queue_upcall(inode, &gss_new->msg);
482 gss_unhash_msg(gss_new);
483 gss_msg = ERR_PTR(res);
486 gss_release_msg(gss_new);
490 static void warn_gssd(void)
492 static unsigned long ratelimit;
493 unsigned long now = jiffies;
495 if (time_after(now, ratelimit)) {
496 printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n"
497 "Please check user daemon is running.\n");
498 ratelimit = now + 15*HZ;
503 gss_refresh_upcall(struct rpc_task *task)
505 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
506 struct gss_auth *gss_auth = container_of(cred->cr_auth,
507 struct gss_auth, rpc_auth);
508 struct gss_cred *gss_cred = container_of(cred,
509 struct gss_cred, gc_base);
510 struct gss_upcall_msg *gss_msg;
514 dprintk("RPC: %5u gss_refresh_upcall for uid %u\n", task->tk_pid,
516 gss_msg = gss_setup_upcall(task->tk_client, gss_auth, cred);
517 if (PTR_ERR(gss_msg) == -EAGAIN) {
518 /* XXX: warning on the first, under the assumption we
519 * shouldn't normally hit this case on a refresh. */
521 task->tk_timeout = 15*HZ;
522 rpc_sleep_on(&pipe_version_rpc_waitqueue, task, NULL);
525 if (IS_ERR(gss_msg)) {
526 err = PTR_ERR(gss_msg);
529 inode = &gss_msg->inode->vfs_inode;
530 spin_lock(&inode->i_lock);
531 if (gss_cred->gc_upcall != NULL)
532 rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL);
533 else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) {
534 task->tk_timeout = 0;
535 gss_cred->gc_upcall = gss_msg;
536 /* gss_upcall_callback will release the reference to gss_upcall_msg */
537 atomic_inc(&gss_msg->count);
538 rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback);
540 gss_handle_downcall_result(gss_cred, gss_msg);
541 err = gss_msg->msg.errno;
543 spin_unlock(&inode->i_lock);
544 gss_release_msg(gss_msg);
546 dprintk("RPC: %5u gss_refresh_upcall for uid %u result %d\n",
547 task->tk_pid, cred->cr_uid, err);
552 gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred)
555 struct rpc_cred *cred = &gss_cred->gc_base;
556 struct gss_upcall_msg *gss_msg;
560 dprintk("RPC: gss_upcall for uid %u\n", cred->cr_uid);
562 gss_msg = gss_setup_upcall(gss_auth->client, gss_auth, cred);
563 if (PTR_ERR(gss_msg) == -EAGAIN) {
564 err = wait_event_interruptible_timeout(pipe_version_waitqueue,
565 pipe_version >= 0, 15*HZ);
568 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_INTERRUPTIBLE);
579 spin_lock(&inode->i_lock);
580 if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) {
583 spin_unlock(&inode->i_lock);
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",
605 gss_pipe_upcall(struct file *filp, struct rpc_pipe_msg *msg,
606 char __user *dst, size_t buflen)
608 char *data = (char *)msg->data + msg->copied;
609 size_t mlen = min(msg->len, buflen);
612 left = copy_to_user(dst, data, mlen);
614 msg->errno = -EFAULT;
624 #define MSG_BUF_MAXSIZE 1024
627 gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
631 struct gss_upcall_msg *gss_msg;
632 struct inode *inode = filp->f_path.dentry->d_inode;
633 struct gss_cl_ctx *ctx;
635 ssize_t err = -EFBIG;
637 if (mlen > MSG_BUF_MAXSIZE)
640 buf = kmalloc(mlen, GFP_NOFS);
645 if (copy_from_user(buf, src, mlen))
648 end = (const void *)((char *)buf + mlen);
649 p = simple_get_bytes(buf, end, &uid, sizeof(uid));
656 ctx = gss_alloc_context();
661 /* Find a matching upcall */
662 spin_lock(&inode->i_lock);
663 gss_msg = __gss_find_upcall(RPC_I(inode), uid);
664 if (gss_msg == NULL) {
665 spin_unlock(&inode->i_lock);
668 list_del_init(&gss_msg->list);
669 spin_unlock(&inode->i_lock);
671 p = gss_fill_context(p, end, ctx, gss_msg->auth->mech);
677 gss_msg->msg.errno = err;
684 gss_msg->msg.errno = -EAGAIN;
687 printk(KERN_CRIT "%s: bad return from "
688 "gss_fill_context: %zd\n", __func__, err);
691 goto err_release_msg;
693 gss_msg->ctx = gss_get_ctx(ctx);
697 spin_lock(&inode->i_lock);
698 __gss_unhash_msg(gss_msg);
699 spin_unlock(&inode->i_lock);
700 gss_release_msg(gss_msg);
706 dprintk("RPC: gss_pipe_downcall returning %Zd\n", err);
710 static int gss_pipe_open(struct inode *inode, int new_version)
714 spin_lock(&pipe_version_lock);
715 if (pipe_version < 0) {
716 /* First open of any gss pipe determines the version: */
717 pipe_version = new_version;
718 rpc_wake_up(&pipe_version_rpc_waitqueue);
719 wake_up(&pipe_version_waitqueue);
720 } else if (pipe_version != new_version) {
721 /* Trying to open a pipe of a different version */
725 atomic_inc(&pipe_users);
727 spin_unlock(&pipe_version_lock);
732 static int gss_pipe_open_v0(struct inode *inode)
734 return gss_pipe_open(inode, 0);
737 static int gss_pipe_open_v1(struct inode *inode)
739 return gss_pipe_open(inode, 1);
743 gss_pipe_release(struct inode *inode)
745 struct rpc_inode *rpci = RPC_I(inode);
746 struct gss_upcall_msg *gss_msg;
749 spin_lock(&inode->i_lock);
750 list_for_each_entry(gss_msg, &rpci->in_downcall, list) {
752 if (!list_empty(&gss_msg->msg.list))
754 gss_msg->msg.errno = -EPIPE;
755 atomic_inc(&gss_msg->count);
756 __gss_unhash_msg(gss_msg);
757 spin_unlock(&inode->i_lock);
758 gss_release_msg(gss_msg);
761 spin_unlock(&inode->i_lock);
767 gss_pipe_destroy_msg(struct rpc_pipe_msg *msg)
769 struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg);
771 if (msg->errno < 0) {
772 dprintk("RPC: gss_pipe_destroy_msg releasing msg %p\n",
774 atomic_inc(&gss_msg->count);
775 gss_unhash_msg(gss_msg);
776 if (msg->errno == -ETIMEDOUT)
778 gss_release_msg(gss_msg);
783 * NOTE: we have the opportunity to use different
784 * parameters based on the input flavor (which must be a pseudoflavor)
786 static struct rpc_auth *
787 gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
789 struct gss_auth *gss_auth;
790 struct rpc_auth * auth;
791 int err = -ENOMEM; /* XXX? */
793 dprintk("RPC: creating GSS authenticator for client %p\n", clnt);
795 if (!try_module_get(THIS_MODULE))
797 if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL)))
799 gss_auth->client = clnt;
801 gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor);
802 if (!gss_auth->mech) {
803 printk(KERN_WARNING "%s: Pseudoflavor %d not found!\n",
807 gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor);
808 if (gss_auth->service == 0)
810 auth = &gss_auth->rpc_auth;
811 auth->au_cslack = GSS_CRED_SLACK >> 2;
812 auth->au_rslack = GSS_VERF_SLACK >> 2;
813 auth->au_ops = &authgss_ops;
814 auth->au_flavor = flavor;
815 atomic_set(&auth->au_count, 1);
816 kref_init(&gss_auth->kref);
819 * Note: if we created the old pipe first, then someone who
820 * examined the directory at the right moment might conclude
821 * that we supported only the old pipe. So we instead create
822 * the new pipe first.
824 gss_auth->dentry[1] = rpc_mkpipe(clnt->cl_path.dentry,
826 clnt, &gss_upcall_ops_v1,
827 RPC_PIPE_WAIT_FOR_OPEN);
828 if (IS_ERR(gss_auth->dentry[1])) {
829 err = PTR_ERR(gss_auth->dentry[1]);
833 gss_auth->dentry[0] = rpc_mkpipe(clnt->cl_path.dentry,
834 gss_auth->mech->gm_name,
835 clnt, &gss_upcall_ops_v0,
836 RPC_PIPE_WAIT_FOR_OPEN);
837 if (IS_ERR(gss_auth->dentry[0])) {
838 err = PTR_ERR(gss_auth->dentry[0]);
839 goto err_unlink_pipe_1;
841 err = rpcauth_init_credcache(auth);
843 goto err_unlink_pipe_0;
847 rpc_unlink(gss_auth->dentry[0]);
849 rpc_unlink(gss_auth->dentry[1]);
851 gss_mech_put(gss_auth->mech);
855 module_put(THIS_MODULE);
860 gss_free(struct gss_auth *gss_auth)
862 rpc_unlink(gss_auth->dentry[1]);
863 rpc_unlink(gss_auth->dentry[0]);
864 gss_mech_put(gss_auth->mech);
867 module_put(THIS_MODULE);
871 gss_free_callback(struct kref *kref)
873 struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref);
879 gss_destroy(struct rpc_auth *auth)
881 struct gss_auth *gss_auth;
883 dprintk("RPC: destroying GSS authenticator %p flavor %d\n",
884 auth, auth->au_flavor);
886 rpcauth_destroy_credcache(auth);
888 gss_auth = container_of(auth, struct gss_auth, rpc_auth);
889 kref_put(&gss_auth->kref, gss_free_callback);
893 * gss_destroying_context will cause the RPCSEC_GSS to send a NULL RPC call
894 * to the server with the GSS control procedure field set to
895 * RPC_GSS_PROC_DESTROY. This should normally cause the server to release
896 * all RPCSEC_GSS state associated with that context.
899 gss_destroying_context(struct rpc_cred *cred)
901 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
902 struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth);
903 struct rpc_task *task;
905 if (gss_cred->gc_ctx == NULL ||
906 test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0)
909 gss_cred->gc_ctx->gc_proc = RPC_GSS_PROC_DESTROY;
910 cred->cr_ops = &gss_nullops;
912 /* Take a reference to ensure the cred will be destroyed either
913 * by the RPC call or by the put_rpccred() below */
916 task = rpc_call_null(gss_auth->client, cred, RPC_TASK_ASYNC|RPC_TASK_SOFT);
924 /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure
925 * to create a new cred or context, so they check that things have been
926 * allocated before freeing them. */
928 gss_do_free_ctx(struct gss_cl_ctx *ctx)
930 dprintk("RPC: gss_free_ctx\n");
932 gss_delete_sec_context(&ctx->gc_gss_ctx);
933 kfree(ctx->gc_wire_ctx.data);
938 gss_free_ctx_callback(struct rcu_head *head)
940 struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu);
941 gss_do_free_ctx(ctx);
945 gss_free_ctx(struct gss_cl_ctx *ctx)
947 call_rcu(&ctx->gc_rcu, gss_free_ctx_callback);
951 gss_free_cred(struct gss_cred *gss_cred)
953 dprintk("RPC: gss_free_cred %p\n", gss_cred);
958 gss_free_cred_callback(struct rcu_head *head)
960 struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu);
961 gss_free_cred(gss_cred);
965 gss_destroy_nullcred(struct rpc_cred *cred)
967 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
968 struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth);
969 struct gss_cl_ctx *ctx = gss_cred->gc_ctx;
971 rcu_assign_pointer(gss_cred->gc_ctx, NULL);
972 call_rcu(&cred->cr_rcu, gss_free_cred_callback);
975 kref_put(&gss_auth->kref, gss_free_callback);
979 gss_destroy_cred(struct rpc_cred *cred)
982 if (gss_destroying_context(cred))
984 gss_destroy_nullcred(cred);
988 * Lookup RPCSEC_GSS cred for the current process
990 static struct rpc_cred *
991 gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
993 return rpcauth_lookup_credcache(auth, acred, flags);
996 static struct rpc_cred *
997 gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
999 struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth);
1000 struct gss_cred *cred = NULL;
1003 dprintk("RPC: gss_create_cred for uid %d, flavor %d\n",
1004 acred->uid, auth->au_flavor);
1006 if (!(cred = kzalloc(sizeof(*cred), GFP_NOFS)))
1009 rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops);
1011 * Note: in order to force a call to call_refresh(), we deliberately
1012 * fail to flag the credential as RPCAUTH_CRED_UPTODATE.
1014 cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW;
1015 cred->gc_service = gss_auth->service;
1016 cred->gc_machine_cred = acred->machine_cred;
1017 kref_get(&gss_auth->kref);
1018 return &cred->gc_base;
1021 dprintk("RPC: gss_create_cred failed with error %d\n", err);
1022 return ERR_PTR(err);
1026 gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred)
1028 struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth);
1029 struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base);
1033 err = gss_create_upcall(gss_auth, gss_cred);
1034 } while (err == -EAGAIN);
1039 gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags)
1041 struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base);
1043 if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags))
1045 /* Don't match with creds that have expired. */
1046 if (time_after(jiffies, gss_cred->gc_ctx->gc_expiry))
1048 if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags))
1051 if (acred->machine_cred != gss_cred->gc_machine_cred)
1053 return (rc->cr_uid == acred->uid);
1057 * Marshal credentials.
1058 * Maybe we should keep a cached credential for performance reasons.
1061 gss_marshal(struct rpc_task *task, __be32 *p)
1063 struct rpc_rqst *req = task->tk_rqstp;
1064 struct rpc_cred *cred = req->rq_cred;
1065 struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
1067 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1070 struct xdr_netobj mic;
1072 struct xdr_buf verf_buf;
1074 dprintk("RPC: %5u gss_marshal\n", task->tk_pid);
1076 *p++ = htonl(RPC_AUTH_GSS);
1079 spin_lock(&ctx->gc_seq_lock);
1080 req->rq_seqno = ctx->gc_seq++;
1081 spin_unlock(&ctx->gc_seq_lock);
1083 *p++ = htonl((u32) RPC_GSS_VERSION);
1084 *p++ = htonl((u32) ctx->gc_proc);
1085 *p++ = htonl((u32) req->rq_seqno);
1086 *p++ = htonl((u32) gss_cred->gc_service);
1087 p = xdr_encode_netobj(p, &ctx->gc_wire_ctx);
1088 *cred_len = htonl((p - (cred_len + 1)) << 2);
1090 /* We compute the checksum for the verifier over the xdr-encoded bytes
1091 * starting with the xid and ending at the end of the credential: */
1092 iov.iov_base = xprt_skip_transport_header(task->tk_xprt,
1093 req->rq_snd_buf.head[0].iov_base);
1094 iov.iov_len = (u8 *)p - (u8 *)iov.iov_base;
1095 xdr_buf_from_iov(&iov, &verf_buf);
1097 /* set verifier flavor*/
1098 *p++ = htonl(RPC_AUTH_GSS);
1100 mic.data = (u8 *)(p + 1);
1101 maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic);
1102 if (maj_stat == GSS_S_CONTEXT_EXPIRED) {
1103 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1104 } else if (maj_stat != 0) {
1105 printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat);
1108 p = xdr_encode_opaque(p, NULL, mic.len);
1116 static int gss_renew_cred(struct rpc_task *task)
1118 struct rpc_cred *oldcred = task->tk_rqstp->rq_cred;
1119 struct gss_cred *gss_cred = container_of(oldcred,
1122 struct rpc_auth *auth = oldcred->cr_auth;
1123 struct auth_cred acred = {
1124 .uid = oldcred->cr_uid,
1125 .machine_cred = gss_cred->gc_machine_cred,
1127 struct rpc_cred *new;
1129 new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW);
1131 return PTR_ERR(new);
1132 task->tk_rqstp->rq_cred = new;
1133 put_rpccred(oldcred);
1137 static int gss_cred_is_negative_entry(struct rpc_cred *cred)
1139 if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) {
1140 unsigned long now = jiffies;
1141 unsigned long begin, expire;
1142 struct gss_cred *gss_cred;
1144 gss_cred = container_of(cred, struct gss_cred, gc_base);
1145 begin = gss_cred->gc_upcall_timestamp;
1146 expire = begin + gss_expired_cred_retry_delay * HZ;
1148 if (time_in_range_open(now, begin, expire))
1155 * Refresh credentials. XXX - finish
1158 gss_refresh(struct rpc_task *task)
1160 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
1163 if (gss_cred_is_negative_entry(cred))
1164 return -EKEYEXPIRED;
1166 if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) &&
1167 !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) {
1168 ret = gss_renew_cred(task);
1171 cred = task->tk_rqstp->rq_cred;
1174 if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags))
1175 ret = gss_refresh_upcall(task);
1180 /* Dummy refresh routine: used only when destroying the context */
1182 gss_refresh_null(struct rpc_task *task)
1188 gss_validate(struct rpc_task *task, __be32 *p)
1190 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
1191 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1194 struct xdr_buf verf_buf;
1195 struct xdr_netobj mic;
1199 dprintk("RPC: %5u gss_validate\n", task->tk_pid);
1202 if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE)
1204 if (flav != RPC_AUTH_GSS)
1206 seq = htonl(task->tk_rqstp->rq_seqno);
1207 iov.iov_base = &seq;
1208 iov.iov_len = sizeof(seq);
1209 xdr_buf_from_iov(&iov, &verf_buf);
1213 maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic);
1214 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1215 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1217 dprintk("RPC: %5u gss_validate: gss_verify_mic returned "
1218 "error 0x%08x\n", task->tk_pid, maj_stat);
1221 /* We leave it to unwrap to calculate au_rslack. For now we just
1222 * calculate the length of the verifier: */
1223 cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2;
1225 dprintk("RPC: %5u gss_validate: gss_verify_mic succeeded.\n",
1227 return p + XDR_QUADLEN(len);
1230 dprintk("RPC: %5u gss_validate failed.\n", task->tk_pid);
1235 gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1236 kxdrproc_t encode, struct rpc_rqst *rqstp, __be32 *p, void *obj)
1238 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
1239 struct xdr_buf integ_buf;
1240 __be32 *integ_len = NULL;
1241 struct xdr_netobj mic;
1249 offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base;
1250 *p++ = htonl(rqstp->rq_seqno);
1252 status = encode(rqstp, p, obj);
1256 if (xdr_buf_subsegment(snd_buf, &integ_buf,
1257 offset, snd_buf->len - offset))
1259 *integ_len = htonl(integ_buf.len);
1261 /* guess whether we're in the head or the tail: */
1262 if (snd_buf->page_len || snd_buf->tail[0].iov_len)
1263 iov = snd_buf->tail;
1265 iov = snd_buf->head;
1266 p = iov->iov_base + iov->iov_len;
1267 mic.data = (u8 *)(p + 1);
1269 maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic);
1270 status = -EIO; /* XXX? */
1271 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1272 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1275 q = xdr_encode_opaque(p, NULL, mic.len);
1277 offset = (u8 *)q - (u8 *)p;
1278 iov->iov_len += offset;
1279 snd_buf->len += offset;
1284 priv_release_snd_buf(struct rpc_rqst *rqstp)
1288 for (i=0; i < rqstp->rq_enc_pages_num; i++)
1289 __free_page(rqstp->rq_enc_pages[i]);
1290 kfree(rqstp->rq_enc_pages);
1294 alloc_enc_pages(struct rpc_rqst *rqstp)
1296 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
1299 if (snd_buf->page_len == 0) {
1300 rqstp->rq_enc_pages_num = 0;
1304 first = snd_buf->page_base >> PAGE_CACHE_SHIFT;
1305 last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT;
1306 rqstp->rq_enc_pages_num = last - first + 1 + 1;
1308 = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *),
1310 if (!rqstp->rq_enc_pages)
1312 for (i=0; i < rqstp->rq_enc_pages_num; i++) {
1313 rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS);
1314 if (rqstp->rq_enc_pages[i] == NULL)
1317 rqstp->rq_release_snd_buf = priv_release_snd_buf;
1320 rqstp->rq_enc_pages_num = i;
1321 priv_release_snd_buf(rqstp);
1327 gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1328 kxdrproc_t encode, struct rpc_rqst *rqstp, __be32 *p, void *obj)
1330 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
1335 struct page **inpages;
1342 offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base;
1343 *p++ = htonl(rqstp->rq_seqno);
1345 status = encode(rqstp, p, obj);
1349 status = alloc_enc_pages(rqstp);
1352 first = snd_buf->page_base >> PAGE_CACHE_SHIFT;
1353 inpages = snd_buf->pages + first;
1354 snd_buf->pages = rqstp->rq_enc_pages;
1355 snd_buf->page_base -= first << PAGE_CACHE_SHIFT;
1357 * Give the tail its own page, in case we need extra space in the
1358 * head when wrapping:
1360 * call_allocate() allocates twice the slack space required
1361 * by the authentication flavor to rq_callsize.
1362 * For GSS, slack is GSS_CRED_SLACK.
1364 if (snd_buf->page_len || snd_buf->tail[0].iov_len) {
1365 tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]);
1366 memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len);
1367 snd_buf->tail[0].iov_base = tmp;
1369 maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages);
1370 /* slack space should prevent this ever happening: */
1371 BUG_ON(snd_buf->len > snd_buf->buflen);
1373 /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was
1374 * done anyway, so it's safe to put the request on the wire: */
1375 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1376 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1380 *opaque_len = htonl(snd_buf->len - offset);
1381 /* guess whether we're in the head or the tail: */
1382 if (snd_buf->page_len || snd_buf->tail[0].iov_len)
1383 iov = snd_buf->tail;
1385 iov = snd_buf->head;
1386 p = iov->iov_base + iov->iov_len;
1387 pad = 3 - ((snd_buf->len - offset - 1) & 3);
1389 iov->iov_len += pad;
1390 snd_buf->len += pad;
1396 gss_wrap_req(struct rpc_task *task,
1397 kxdrproc_t encode, void *rqstp, __be32 *p, void *obj)
1399 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
1400 struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
1402 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1405 dprintk("RPC: %5u gss_wrap_req\n", task->tk_pid);
1406 if (ctx->gc_proc != RPC_GSS_PROC_DATA) {
1407 /* The spec seems a little ambiguous here, but I think that not
1408 * wrapping context destruction requests makes the most sense.
1410 status = encode(rqstp, p, obj);
1413 switch (gss_cred->gc_service) {
1414 case RPC_GSS_SVC_NONE:
1415 status = encode(rqstp, p, obj);
1417 case RPC_GSS_SVC_INTEGRITY:
1418 status = gss_wrap_req_integ(cred, ctx, encode,
1421 case RPC_GSS_SVC_PRIVACY:
1422 status = gss_wrap_req_priv(cred, ctx, encode,
1428 dprintk("RPC: %5u gss_wrap_req returning %d\n", task->tk_pid, status);
1433 gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1434 struct rpc_rqst *rqstp, __be32 **p)
1436 struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf;
1437 struct xdr_buf integ_buf;
1438 struct xdr_netobj mic;
1439 u32 data_offset, mic_offset;
1444 integ_len = ntohl(*(*p)++);
1447 data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base;
1448 mic_offset = integ_len + data_offset;
1449 if (mic_offset > rcv_buf->len)
1451 if (ntohl(*(*p)++) != rqstp->rq_seqno)
1454 if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset,
1455 mic_offset - data_offset))
1458 if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset))
1461 maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic);
1462 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1463 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1464 if (maj_stat != GSS_S_COMPLETE)
1470 gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1471 struct rpc_rqst *rqstp, __be32 **p)
1473 struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf;
1479 opaque_len = ntohl(*(*p)++);
1480 offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base;
1481 if (offset + opaque_len > rcv_buf->len)
1483 /* remove padding: */
1484 rcv_buf->len = offset + opaque_len;
1486 maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf);
1487 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1488 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1489 if (maj_stat != GSS_S_COMPLETE)
1491 if (ntohl(*(*p)++) != rqstp->rq_seqno)
1499 gss_unwrap_resp(struct rpc_task *task,
1500 kxdrproc_t decode, void *rqstp, __be32 *p, void *obj)
1502 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
1503 struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
1505 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1507 struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head;
1508 int savedlen = head->iov_len;
1511 if (ctx->gc_proc != RPC_GSS_PROC_DATA)
1513 switch (gss_cred->gc_service) {
1514 case RPC_GSS_SVC_NONE:
1516 case RPC_GSS_SVC_INTEGRITY:
1517 status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p);
1521 case RPC_GSS_SVC_PRIVACY:
1522 status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p);
1527 /* take into account extra slack for integrity and privacy cases: */
1528 cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp)
1529 + (savedlen - head->iov_len);
1531 status = decode(rqstp, p, obj);
1534 dprintk("RPC: %5u gss_unwrap_resp returning %d\n", task->tk_pid,
1539 static const struct rpc_authops authgss_ops = {
1540 .owner = THIS_MODULE,
1541 .au_flavor = RPC_AUTH_GSS,
1542 .au_name = "RPCSEC_GSS",
1543 .create = gss_create,
1544 .destroy = gss_destroy,
1545 .lookup_cred = gss_lookup_cred,
1546 .crcreate = gss_create_cred
1549 static const struct rpc_credops gss_credops = {
1550 .cr_name = "AUTH_GSS",
1551 .crdestroy = gss_destroy_cred,
1552 .cr_init = gss_cred_init,
1553 .crbind = rpcauth_generic_bind_cred,
1554 .crmatch = gss_match,
1555 .crmarshal = gss_marshal,
1556 .crrefresh = gss_refresh,
1557 .crvalidate = gss_validate,
1558 .crwrap_req = gss_wrap_req,
1559 .crunwrap_resp = gss_unwrap_resp,
1562 static const struct rpc_credops gss_nullops = {
1563 .cr_name = "AUTH_GSS",
1564 .crdestroy = gss_destroy_nullcred,
1565 .crbind = rpcauth_generic_bind_cred,
1566 .crmatch = gss_match,
1567 .crmarshal = gss_marshal,
1568 .crrefresh = gss_refresh_null,
1569 .crvalidate = gss_validate,
1570 .crwrap_req = gss_wrap_req,
1571 .crunwrap_resp = gss_unwrap_resp,
1574 static const struct rpc_pipe_ops gss_upcall_ops_v0 = {
1575 .upcall = gss_pipe_upcall,
1576 .downcall = gss_pipe_downcall,
1577 .destroy_msg = gss_pipe_destroy_msg,
1578 .open_pipe = gss_pipe_open_v0,
1579 .release_pipe = gss_pipe_release,
1582 static const struct rpc_pipe_ops gss_upcall_ops_v1 = {
1583 .upcall = gss_pipe_upcall,
1584 .downcall = gss_pipe_downcall,
1585 .destroy_msg = gss_pipe_destroy_msg,
1586 .open_pipe = gss_pipe_open_v1,
1587 .release_pipe = gss_pipe_release,
1591 * Initialize RPCSEC_GSS module
1593 static int __init init_rpcsec_gss(void)
1597 err = rpcauth_register(&authgss_ops);
1600 err = gss_svc_init();
1602 goto out_unregister;
1603 rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version");
1606 rpcauth_unregister(&authgss_ops);
1611 static void __exit exit_rpcsec_gss(void)
1614 rpcauth_unregister(&authgss_ops);
1615 rcu_barrier(); /* Wait for completion of call_rcu()'s */
1618 MODULE_LICENSE("GPL");
1619 module_param_named(expired_cred_retry_delay,
1620 gss_expired_cred_retry_delay,
1622 MODULE_PARM_DESC(expired_cred_retry_delay, "Timeout (in seconds) until "
1623 "the RPC engine retries an expired credential");
1625 module_init(init_rpcsec_gss)
1626 module_exit(exit_rpcsec_gss)