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;
61 # define RPCDBG_FACILITY RPCDBG_AUTH
64 #define GSS_CRED_SLACK (RPC_MAX_AUTH_SIZE * 2)
65 /* length of a krb5 verifier (48), plus data added before arguments when
66 * using integrity (two 4-byte integers): */
67 #define GSS_VERF_SLACK 100
71 struct rpc_auth rpc_auth;
72 struct gss_api_mech *mech;
73 enum rpc_gss_svc service;
74 struct rpc_clnt *client;
76 * There are two upcall pipes; dentry[1], named "gssd", is used
77 * for the new text-based upcall; dentry[0] is named after the
78 * mechanism (for example, "krb5") and exists for
79 * backwards-compatibility with older gssd's.
81 struct dentry *dentry[2];
84 /* pipe_version >= 0 if and only if someone has a pipe open. */
85 static int pipe_version = -1;
86 static atomic_t pipe_users = ATOMIC_INIT(0);
87 static DEFINE_SPINLOCK(pipe_version_lock);
88 static struct rpc_wait_queue pipe_version_rpc_waitqueue;
89 static DECLARE_WAIT_QUEUE_HEAD(pipe_version_waitqueue);
91 static void gss_free_ctx(struct gss_cl_ctx *);
92 static const struct rpc_pipe_ops gss_upcall_ops_v0;
93 static const struct rpc_pipe_ops gss_upcall_ops_v1;
95 static inline struct gss_cl_ctx *
96 gss_get_ctx(struct gss_cl_ctx *ctx)
98 atomic_inc(&ctx->count);
103 gss_put_ctx(struct gss_cl_ctx *ctx)
105 if (atomic_dec_and_test(&ctx->count))
110 * called by gss_upcall_callback and gss_create_upcall in order
111 * to set the gss context. The actual exchange of an old context
112 * and a new one is protected by the inode->i_lock.
115 gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx)
117 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
119 if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags))
122 rcu_assign_pointer(gss_cred->gc_ctx, ctx);
123 set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
124 smp_mb__before_clear_bit();
125 clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags);
129 simple_get_bytes(const void *p, const void *end, void *res, size_t len)
131 const void *q = (const void *)((const char *)p + len);
132 if (unlikely(q > end || q < p))
133 return ERR_PTR(-EFAULT);
138 static inline const void *
139 simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest)
144 p = simple_get_bytes(p, end, &len, sizeof(len));
147 q = (const void *)((const char *)p + len);
148 if (unlikely(q > end || q < p))
149 return ERR_PTR(-EFAULT);
150 dest->data = kmemdup(p, len, GFP_NOFS);
151 if (unlikely(dest->data == NULL))
152 return ERR_PTR(-ENOMEM);
157 static struct gss_cl_ctx *
158 gss_cred_get_ctx(struct rpc_cred *cred)
160 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
161 struct gss_cl_ctx *ctx = NULL;
164 if (gss_cred->gc_ctx)
165 ctx = gss_get_ctx(gss_cred->gc_ctx);
170 static struct gss_cl_ctx *
171 gss_alloc_context(void)
173 struct gss_cl_ctx *ctx;
175 ctx = kzalloc(sizeof(*ctx), GFP_NOFS);
177 ctx->gc_proc = RPC_GSS_PROC_DATA;
178 ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */
179 spin_lock_init(&ctx->gc_seq_lock);
180 atomic_set(&ctx->count,1);
185 #define GSSD_MIN_TIMEOUT (60 * 60)
187 gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm)
191 unsigned int timeout;
195 /* First unsigned int gives the lifetime (in seconds) of the cred */
196 p = simple_get_bytes(p, end, &timeout, sizeof(timeout));
200 timeout = GSSD_MIN_TIMEOUT;
201 ctx->gc_expiry = jiffies + (unsigned long)timeout * HZ * 3 / 4;
202 /* Sequence number window. Determines the maximum number of simultaneous requests */
203 p = simple_get_bytes(p, end, &window_size, sizeof(window_size));
206 ctx->gc_win = window_size;
207 /* gssd signals an error by passing ctx->gc_win = 0: */
208 if (ctx->gc_win == 0) {
210 * in which case, p points to an error code. Anything other
211 * than -EKEYEXPIRED gets converted to -EACCES.
213 p = simple_get_bytes(p, end, &ret, sizeof(ret));
215 p = (ret == -EKEYEXPIRED) ? ERR_PTR(-EKEYEXPIRED) :
219 /* copy the opaque wire context */
220 p = simple_get_netobj(p, end, &ctx->gc_wire_ctx);
223 /* import the opaque security context */
224 p = simple_get_bytes(p, end, &seclen, sizeof(seclen));
227 q = (const void *)((const char *)p + seclen);
228 if (unlikely(q > end || q < p)) {
229 p = ERR_PTR(-EFAULT);
232 ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx, GFP_NOFS);
239 dprintk("RPC: gss_fill_context returning %ld\n", -PTR_ERR(p));
243 #define UPCALL_BUF_LEN 128
245 struct gss_upcall_msg {
248 struct rpc_pipe_msg msg;
249 struct list_head list;
250 struct gss_auth *auth;
251 struct rpc_inode *inode;
252 struct rpc_wait_queue rpc_waitqueue;
253 wait_queue_head_t waitqueue;
254 struct gss_cl_ctx *ctx;
255 char databuf[UPCALL_BUF_LEN];
258 static int get_pipe_version(void)
262 spin_lock(&pipe_version_lock);
263 if (pipe_version >= 0) {
264 atomic_inc(&pipe_users);
268 spin_unlock(&pipe_version_lock);
272 static void put_pipe_version(void)
274 if (atomic_dec_and_lock(&pipe_users, &pipe_version_lock)) {
276 spin_unlock(&pipe_version_lock);
281 gss_release_msg(struct gss_upcall_msg *gss_msg)
283 if (!atomic_dec_and_test(&gss_msg->count))
286 BUG_ON(!list_empty(&gss_msg->list));
287 if (gss_msg->ctx != NULL)
288 gss_put_ctx(gss_msg->ctx);
289 rpc_destroy_wait_queue(&gss_msg->rpc_waitqueue);
293 static struct gss_upcall_msg *
294 __gss_find_upcall(struct rpc_inode *rpci, uid_t uid)
296 struct gss_upcall_msg *pos;
297 list_for_each_entry(pos, &rpci->in_downcall, list) {
300 atomic_inc(&pos->count);
301 dprintk("RPC: gss_find_upcall found msg %p\n", pos);
304 dprintk("RPC: gss_find_upcall found nothing\n");
308 /* Try to add an upcall to the pipefs queue.
309 * If an upcall owned by our uid already exists, then we return a reference
310 * to that upcall instead of adding the new upcall.
312 static inline struct gss_upcall_msg *
313 gss_add_msg(struct gss_upcall_msg *gss_msg)
315 struct rpc_inode *rpci = gss_msg->inode;
316 struct inode *inode = &rpci->vfs_inode;
317 struct gss_upcall_msg *old;
319 spin_lock(&inode->i_lock);
320 old = __gss_find_upcall(rpci, gss_msg->uid);
322 atomic_inc(&gss_msg->count);
323 list_add(&gss_msg->list, &rpci->in_downcall);
326 spin_unlock(&inode->i_lock);
331 __gss_unhash_msg(struct gss_upcall_msg *gss_msg)
333 list_del_init(&gss_msg->list);
334 rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno);
335 wake_up_all(&gss_msg->waitqueue);
336 atomic_dec(&gss_msg->count);
340 gss_unhash_msg(struct gss_upcall_msg *gss_msg)
342 struct inode *inode = &gss_msg->inode->vfs_inode;
344 if (list_empty(&gss_msg->list))
346 spin_lock(&inode->i_lock);
347 if (!list_empty(&gss_msg->list))
348 __gss_unhash_msg(gss_msg);
349 spin_unlock(&inode->i_lock);
353 gss_upcall_callback(struct rpc_task *task)
355 struct gss_cred *gss_cred = container_of(task->tk_msg.rpc_cred,
356 struct gss_cred, gc_base);
357 struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall;
358 struct inode *inode = &gss_msg->inode->vfs_inode;
360 spin_lock(&inode->i_lock);
362 gss_cred_set_ctx(task->tk_msg.rpc_cred, gss_msg->ctx);
364 task->tk_status = gss_msg->msg.errno;
365 gss_cred->gc_upcall = NULL;
366 rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno);
367 spin_unlock(&inode->i_lock);
368 gss_release_msg(gss_msg);
371 static void gss_encode_v0_msg(struct gss_upcall_msg *gss_msg)
373 gss_msg->msg.data = &gss_msg->uid;
374 gss_msg->msg.len = sizeof(gss_msg->uid);
377 static void gss_encode_v1_msg(struct gss_upcall_msg *gss_msg,
378 struct rpc_clnt *clnt, int machine_cred)
380 struct gss_api_mech *mech = gss_msg->auth->mech;
381 char *p = gss_msg->databuf;
384 gss_msg->msg.len = sprintf(gss_msg->databuf, "mech=%s uid=%d ",
387 p += gss_msg->msg.len;
388 if (clnt->cl_principal) {
389 len = sprintf(p, "target=%s ", clnt->cl_principal);
391 gss_msg->msg.len += len;
394 len = sprintf(p, "service=* ");
396 gss_msg->msg.len += len;
397 } else if (!strcmp(clnt->cl_program->name, "nfs4_cb")) {
398 len = sprintf(p, "service=nfs ");
400 gss_msg->msg.len += len;
402 if (mech->gm_upcall_enctypes) {
403 len = sprintf(p, mech->gm_upcall_enctypes);
405 gss_msg->msg.len += len;
407 len = sprintf(p, "\n");
408 gss_msg->msg.len += len;
410 gss_msg->msg.data = gss_msg->databuf;
411 BUG_ON(gss_msg->msg.len > UPCALL_BUF_LEN);
414 static void gss_encode_msg(struct gss_upcall_msg *gss_msg,
415 struct rpc_clnt *clnt, int machine_cred)
417 if (pipe_version == 0)
418 gss_encode_v0_msg(gss_msg);
419 else /* pipe_version == 1 */
420 gss_encode_v1_msg(gss_msg, clnt, machine_cred);
423 static inline struct gss_upcall_msg *
424 gss_alloc_msg(struct gss_auth *gss_auth, uid_t uid, struct rpc_clnt *clnt,
427 struct gss_upcall_msg *gss_msg;
430 gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS);
432 return ERR_PTR(-ENOMEM);
433 vers = get_pipe_version();
436 return ERR_PTR(vers);
438 gss_msg->inode = RPC_I(gss_auth->dentry[vers]->d_inode);
439 INIT_LIST_HEAD(&gss_msg->list);
440 rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq");
441 init_waitqueue_head(&gss_msg->waitqueue);
442 atomic_set(&gss_msg->count, 1);
444 gss_msg->auth = gss_auth;
445 gss_encode_msg(gss_msg, clnt, machine_cred);
449 static struct gss_upcall_msg *
450 gss_setup_upcall(struct rpc_clnt *clnt, struct gss_auth *gss_auth, struct rpc_cred *cred)
452 struct gss_cred *gss_cred = container_of(cred,
453 struct gss_cred, gc_base);
454 struct gss_upcall_msg *gss_new, *gss_msg;
455 uid_t uid = cred->cr_uid;
457 gss_new = gss_alloc_msg(gss_auth, uid, clnt, gss_cred->gc_machine_cred);
460 gss_msg = gss_add_msg(gss_new);
461 if (gss_msg == gss_new) {
462 struct inode *inode = &gss_new->inode->vfs_inode;
463 int res = rpc_queue_upcall(inode, &gss_new->msg);
465 gss_unhash_msg(gss_new);
466 gss_msg = ERR_PTR(res);
469 gss_release_msg(gss_new);
473 static void warn_gssd(void)
475 static unsigned long ratelimit;
476 unsigned long now = jiffies;
478 if (time_after(now, ratelimit)) {
479 printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n"
480 "Please check user daemon is running.\n");
481 ratelimit = now + 15*HZ;
486 gss_refresh_upcall(struct rpc_task *task)
488 struct rpc_cred *cred = task->tk_msg.rpc_cred;
489 struct gss_auth *gss_auth = container_of(cred->cr_auth,
490 struct gss_auth, rpc_auth);
491 struct gss_cred *gss_cred = container_of(cred,
492 struct gss_cred, gc_base);
493 struct gss_upcall_msg *gss_msg;
497 dprintk("RPC: %5u gss_refresh_upcall for uid %u\n", task->tk_pid,
499 gss_msg = gss_setup_upcall(task->tk_client, gss_auth, cred);
500 if (PTR_ERR(gss_msg) == -EAGAIN) {
501 /* XXX: warning on the first, under the assumption we
502 * shouldn't normally hit this case on a refresh. */
504 task->tk_timeout = 15*HZ;
505 rpc_sleep_on(&pipe_version_rpc_waitqueue, task, NULL);
508 if (IS_ERR(gss_msg)) {
509 err = PTR_ERR(gss_msg);
512 inode = &gss_msg->inode->vfs_inode;
513 spin_lock(&inode->i_lock);
514 if (gss_cred->gc_upcall != NULL)
515 rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL);
516 else if (gss_msg->ctx != NULL) {
517 gss_cred_set_ctx(task->tk_msg.rpc_cred, gss_msg->ctx);
518 gss_cred->gc_upcall = NULL;
519 rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno);
520 } else if (gss_msg->msg.errno >= 0) {
521 task->tk_timeout = 0;
522 gss_cred->gc_upcall = gss_msg;
523 /* gss_upcall_callback will release the reference to gss_upcall_msg */
524 atomic_inc(&gss_msg->count);
525 rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback);
527 err = gss_msg->msg.errno;
528 spin_unlock(&inode->i_lock);
529 gss_release_msg(gss_msg);
531 dprintk("RPC: %5u gss_refresh_upcall for uid %u result %d\n",
532 task->tk_pid, cred->cr_uid, err);
537 gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred)
540 struct rpc_cred *cred = &gss_cred->gc_base;
541 struct gss_upcall_msg *gss_msg;
545 dprintk("RPC: gss_upcall for uid %u\n", cred->cr_uid);
547 gss_msg = gss_setup_upcall(gss_auth->client, gss_auth, cred);
548 if (PTR_ERR(gss_msg) == -EAGAIN) {
549 err = wait_event_interruptible_timeout(pipe_version_waitqueue,
550 pipe_version >= 0, 15*HZ);
553 if (pipe_version < 0)
557 if (IS_ERR(gss_msg)) {
558 err = PTR_ERR(gss_msg);
561 inode = &gss_msg->inode->vfs_inode;
563 prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_INTERRUPTIBLE);
564 spin_lock(&inode->i_lock);
565 if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) {
568 spin_unlock(&inode->i_lock);
576 gss_cred_set_ctx(cred, gss_msg->ctx);
578 err = gss_msg->msg.errno;
579 spin_unlock(&inode->i_lock);
581 finish_wait(&gss_msg->waitqueue, &wait);
582 gss_release_msg(gss_msg);
584 dprintk("RPC: gss_create_upcall for uid %u result %d\n",
590 gss_pipe_upcall(struct file *filp, struct rpc_pipe_msg *msg,
591 char __user *dst, size_t buflen)
593 char *data = (char *)msg->data + msg->copied;
594 size_t mlen = min(msg->len, buflen);
597 left = copy_to_user(dst, data, mlen);
599 msg->errno = -EFAULT;
609 #define MSG_BUF_MAXSIZE 1024
612 gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
616 struct gss_upcall_msg *gss_msg;
617 struct inode *inode = filp->f_path.dentry->d_inode;
618 struct gss_cl_ctx *ctx;
620 ssize_t err = -EFBIG;
622 if (mlen > MSG_BUF_MAXSIZE)
625 buf = kmalloc(mlen, GFP_NOFS);
630 if (copy_from_user(buf, src, mlen))
633 end = (const void *)((char *)buf + mlen);
634 p = simple_get_bytes(buf, end, &uid, sizeof(uid));
641 ctx = gss_alloc_context();
646 /* Find a matching upcall */
647 spin_lock(&inode->i_lock);
648 gss_msg = __gss_find_upcall(RPC_I(inode), uid);
649 if (gss_msg == NULL) {
650 spin_unlock(&inode->i_lock);
653 list_del_init(&gss_msg->list);
654 spin_unlock(&inode->i_lock);
656 p = gss_fill_context(p, end, ctx, gss_msg->auth->mech);
662 gss_msg->msg.errno = err;
669 gss_msg->msg.errno = -EAGAIN;
672 printk(KERN_CRIT "%s: bad return from "
673 "gss_fill_context: %zd\n", __func__, err);
676 goto err_release_msg;
678 gss_msg->ctx = gss_get_ctx(ctx);
682 spin_lock(&inode->i_lock);
683 __gss_unhash_msg(gss_msg);
684 spin_unlock(&inode->i_lock);
685 gss_release_msg(gss_msg);
691 dprintk("RPC: gss_pipe_downcall returning %Zd\n", err);
695 static int gss_pipe_open(struct inode *inode, int new_version)
699 spin_lock(&pipe_version_lock);
700 if (pipe_version < 0) {
701 /* First open of any gss pipe determines the version: */
702 pipe_version = new_version;
703 rpc_wake_up(&pipe_version_rpc_waitqueue);
704 wake_up(&pipe_version_waitqueue);
705 } else if (pipe_version != new_version) {
706 /* Trying to open a pipe of a different version */
710 atomic_inc(&pipe_users);
712 spin_unlock(&pipe_version_lock);
717 static int gss_pipe_open_v0(struct inode *inode)
719 return gss_pipe_open(inode, 0);
722 static int gss_pipe_open_v1(struct inode *inode)
724 return gss_pipe_open(inode, 1);
728 gss_pipe_release(struct inode *inode)
730 struct rpc_inode *rpci = RPC_I(inode);
731 struct gss_upcall_msg *gss_msg;
733 spin_lock(&inode->i_lock);
734 while (!list_empty(&rpci->in_downcall)) {
736 gss_msg = list_entry(rpci->in_downcall.next,
737 struct gss_upcall_msg, list);
738 gss_msg->msg.errno = -EPIPE;
739 atomic_inc(&gss_msg->count);
740 __gss_unhash_msg(gss_msg);
741 spin_unlock(&inode->i_lock);
742 gss_release_msg(gss_msg);
743 spin_lock(&inode->i_lock);
745 spin_unlock(&inode->i_lock);
751 gss_pipe_destroy_msg(struct rpc_pipe_msg *msg)
753 struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg);
755 if (msg->errno < 0) {
756 dprintk("RPC: gss_pipe_destroy_msg releasing msg %p\n",
758 atomic_inc(&gss_msg->count);
759 gss_unhash_msg(gss_msg);
760 if (msg->errno == -ETIMEDOUT)
762 gss_release_msg(gss_msg);
767 * NOTE: we have the opportunity to use different
768 * parameters based on the input flavor (which must be a pseudoflavor)
770 static struct rpc_auth *
771 gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
773 struct gss_auth *gss_auth;
774 struct rpc_auth * auth;
775 int err = -ENOMEM; /* XXX? */
777 dprintk("RPC: creating GSS authenticator for client %p\n", clnt);
779 if (!try_module_get(THIS_MODULE))
781 if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL)))
783 gss_auth->client = clnt;
785 gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor);
786 if (!gss_auth->mech) {
787 printk(KERN_WARNING "%s: Pseudoflavor %d not found!\n",
791 gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor);
792 if (gss_auth->service == 0)
794 auth = &gss_auth->rpc_auth;
795 auth->au_cslack = GSS_CRED_SLACK >> 2;
796 auth->au_rslack = GSS_VERF_SLACK >> 2;
797 auth->au_ops = &authgss_ops;
798 auth->au_flavor = flavor;
799 atomic_set(&auth->au_count, 1);
800 kref_init(&gss_auth->kref);
803 * Note: if we created the old pipe first, then someone who
804 * examined the directory at the right moment might conclude
805 * that we supported only the old pipe. So we instead create
806 * the new pipe first.
808 gss_auth->dentry[1] = rpc_mkpipe(clnt->cl_path.dentry,
810 clnt, &gss_upcall_ops_v1,
811 RPC_PIPE_WAIT_FOR_OPEN);
812 if (IS_ERR(gss_auth->dentry[1])) {
813 err = PTR_ERR(gss_auth->dentry[1]);
817 gss_auth->dentry[0] = rpc_mkpipe(clnt->cl_path.dentry,
818 gss_auth->mech->gm_name,
819 clnt, &gss_upcall_ops_v0,
820 RPC_PIPE_WAIT_FOR_OPEN);
821 if (IS_ERR(gss_auth->dentry[0])) {
822 err = PTR_ERR(gss_auth->dentry[0]);
823 goto err_unlink_pipe_1;
825 err = rpcauth_init_credcache(auth);
827 goto err_unlink_pipe_0;
831 rpc_unlink(gss_auth->dentry[0]);
833 rpc_unlink(gss_auth->dentry[1]);
835 gss_mech_put(gss_auth->mech);
839 module_put(THIS_MODULE);
844 gss_free(struct gss_auth *gss_auth)
846 rpc_unlink(gss_auth->dentry[1]);
847 rpc_unlink(gss_auth->dentry[0]);
848 gss_mech_put(gss_auth->mech);
851 module_put(THIS_MODULE);
855 gss_free_callback(struct kref *kref)
857 struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref);
863 gss_destroy(struct rpc_auth *auth)
865 struct gss_auth *gss_auth;
867 dprintk("RPC: destroying GSS authenticator %p flavor %d\n",
868 auth, auth->au_flavor);
870 rpcauth_destroy_credcache(auth);
872 gss_auth = container_of(auth, struct gss_auth, rpc_auth);
873 kref_put(&gss_auth->kref, gss_free_callback);
877 * gss_destroying_context will cause the RPCSEC_GSS to send a NULL RPC call
878 * to the server with the GSS control procedure field set to
879 * RPC_GSS_PROC_DESTROY. This should normally cause the server to release
880 * all RPCSEC_GSS state associated with that context.
883 gss_destroying_context(struct rpc_cred *cred)
885 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
886 struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth);
887 struct rpc_task *task;
889 if (gss_cred->gc_ctx == NULL ||
890 test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0)
893 gss_cred->gc_ctx->gc_proc = RPC_GSS_PROC_DESTROY;
894 cred->cr_ops = &gss_nullops;
896 /* Take a reference to ensure the cred will be destroyed either
897 * by the RPC call or by the put_rpccred() below */
900 task = rpc_call_null(gss_auth->client, cred, RPC_TASK_ASYNC|RPC_TASK_SOFT);
908 /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure
909 * to create a new cred or context, so they check that things have been
910 * allocated before freeing them. */
912 gss_do_free_ctx(struct gss_cl_ctx *ctx)
914 dprintk("RPC: gss_free_ctx\n");
916 kfree(ctx->gc_wire_ctx.data);
921 gss_free_ctx_callback(struct rcu_head *head)
923 struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu);
924 gss_do_free_ctx(ctx);
928 gss_free_ctx(struct gss_cl_ctx *ctx)
930 struct gss_ctx *gc_gss_ctx;
932 gc_gss_ctx = rcu_dereference(ctx->gc_gss_ctx);
933 rcu_assign_pointer(ctx->gc_gss_ctx, NULL);
934 call_rcu(&ctx->gc_rcu, gss_free_ctx_callback);
936 gss_delete_sec_context(&gc_gss_ctx);
940 gss_free_cred(struct gss_cred *gss_cred)
942 dprintk("RPC: gss_free_cred %p\n", gss_cred);
947 gss_free_cred_callback(struct rcu_head *head)
949 struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu);
950 gss_free_cred(gss_cred);
954 gss_destroy_nullcred(struct rpc_cred *cred)
956 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
957 struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth);
958 struct gss_cl_ctx *ctx = gss_cred->gc_ctx;
960 rcu_assign_pointer(gss_cred->gc_ctx, NULL);
961 call_rcu(&cred->cr_rcu, gss_free_cred_callback);
964 kref_put(&gss_auth->kref, gss_free_callback);
968 gss_destroy_cred(struct rpc_cred *cred)
971 if (gss_destroying_context(cred))
973 gss_destroy_nullcred(cred);
977 * Lookup RPCSEC_GSS cred for the current process
979 static struct rpc_cred *
980 gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
982 return rpcauth_lookup_credcache(auth, acred, flags);
985 static struct rpc_cred *
986 gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
988 struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth);
989 struct gss_cred *cred = NULL;
992 dprintk("RPC: gss_create_cred for uid %d, flavor %d\n",
993 acred->uid, auth->au_flavor);
995 if (!(cred = kzalloc(sizeof(*cred), GFP_NOFS)))
998 rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops);
1000 * Note: in order to force a call to call_refresh(), we deliberately
1001 * fail to flag the credential as RPCAUTH_CRED_UPTODATE.
1003 cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW;
1004 cred->gc_service = gss_auth->service;
1005 cred->gc_machine_cred = acred->machine_cred;
1006 kref_get(&gss_auth->kref);
1007 return &cred->gc_base;
1010 dprintk("RPC: gss_create_cred failed with error %d\n", err);
1011 return ERR_PTR(err);
1015 gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred)
1017 struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth);
1018 struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base);
1022 err = gss_create_upcall(gss_auth, gss_cred);
1023 } while (err == -EAGAIN);
1028 gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags)
1030 struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base);
1032 if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags))
1034 /* Don't match with creds that have expired. */
1035 if (time_after(jiffies, gss_cred->gc_ctx->gc_expiry))
1037 if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags))
1040 if (acred->machine_cred != gss_cred->gc_machine_cred)
1042 return (rc->cr_uid == acred->uid);
1046 * Marshal credentials.
1047 * Maybe we should keep a cached credential for performance reasons.
1050 gss_marshal(struct rpc_task *task, __be32 *p)
1052 struct rpc_cred *cred = task->tk_msg.rpc_cred;
1053 struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
1055 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1057 struct rpc_rqst *req = task->tk_rqstp;
1059 struct xdr_netobj mic;
1061 struct xdr_buf verf_buf;
1063 dprintk("RPC: %5u gss_marshal\n", task->tk_pid);
1065 *p++ = htonl(RPC_AUTH_GSS);
1068 spin_lock(&ctx->gc_seq_lock);
1069 req->rq_seqno = ctx->gc_seq++;
1070 spin_unlock(&ctx->gc_seq_lock);
1072 *p++ = htonl((u32) RPC_GSS_VERSION);
1073 *p++ = htonl((u32) ctx->gc_proc);
1074 *p++ = htonl((u32) req->rq_seqno);
1075 *p++ = htonl((u32) gss_cred->gc_service);
1076 p = xdr_encode_netobj(p, &ctx->gc_wire_ctx);
1077 *cred_len = htonl((p - (cred_len + 1)) << 2);
1079 /* We compute the checksum for the verifier over the xdr-encoded bytes
1080 * starting with the xid and ending at the end of the credential: */
1081 iov.iov_base = xprt_skip_transport_header(task->tk_xprt,
1082 req->rq_snd_buf.head[0].iov_base);
1083 iov.iov_len = (u8 *)p - (u8 *)iov.iov_base;
1084 xdr_buf_from_iov(&iov, &verf_buf);
1086 /* set verifier flavor*/
1087 *p++ = htonl(RPC_AUTH_GSS);
1089 mic.data = (u8 *)(p + 1);
1090 maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic);
1091 if (maj_stat == GSS_S_CONTEXT_EXPIRED) {
1092 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1093 } else if (maj_stat != 0) {
1094 printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat);
1097 p = xdr_encode_opaque(p, NULL, mic.len);
1105 static int gss_renew_cred(struct rpc_task *task)
1107 struct rpc_cred *oldcred = task->tk_msg.rpc_cred;
1108 struct gss_cred *gss_cred = container_of(oldcred,
1111 struct rpc_auth *auth = oldcred->cr_auth;
1112 struct auth_cred acred = {
1113 .uid = oldcred->cr_uid,
1114 .machine_cred = gss_cred->gc_machine_cred,
1116 struct rpc_cred *new;
1118 new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW);
1120 return PTR_ERR(new);
1121 task->tk_msg.rpc_cred = new;
1122 put_rpccred(oldcred);
1127 * Refresh credentials. XXX - finish
1130 gss_refresh(struct rpc_task *task)
1132 struct rpc_cred *cred = task->tk_msg.rpc_cred;
1135 if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) &&
1136 !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) {
1137 ret = gss_renew_cred(task);
1140 cred = task->tk_msg.rpc_cred;
1143 if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags))
1144 ret = gss_refresh_upcall(task);
1149 /* Dummy refresh routine: used only when destroying the context */
1151 gss_refresh_null(struct rpc_task *task)
1157 gss_validate(struct rpc_task *task, __be32 *p)
1159 struct rpc_cred *cred = task->tk_msg.rpc_cred;
1160 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1163 struct xdr_buf verf_buf;
1164 struct xdr_netobj mic;
1168 dprintk("RPC: %5u gss_validate\n", task->tk_pid);
1171 if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE)
1173 if (flav != RPC_AUTH_GSS)
1175 seq = htonl(task->tk_rqstp->rq_seqno);
1176 iov.iov_base = &seq;
1177 iov.iov_len = sizeof(seq);
1178 xdr_buf_from_iov(&iov, &verf_buf);
1182 maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic);
1183 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1184 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1186 dprintk("RPC: %5u gss_validate: gss_verify_mic returned "
1187 "error 0x%08x\n", task->tk_pid, maj_stat);
1190 /* We leave it to unwrap to calculate au_rslack. For now we just
1191 * calculate the length of the verifier: */
1192 cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2;
1194 dprintk("RPC: %5u gss_validate: gss_verify_mic succeeded.\n",
1196 return p + XDR_QUADLEN(len);
1199 dprintk("RPC: %5u gss_validate failed.\n", task->tk_pid);
1204 gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1205 kxdrproc_t encode, struct rpc_rqst *rqstp, __be32 *p, void *obj)
1207 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
1208 struct xdr_buf integ_buf;
1209 __be32 *integ_len = NULL;
1210 struct xdr_netobj mic;
1218 offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base;
1219 *p++ = htonl(rqstp->rq_seqno);
1221 status = encode(rqstp, p, obj);
1225 if (xdr_buf_subsegment(snd_buf, &integ_buf,
1226 offset, snd_buf->len - offset))
1228 *integ_len = htonl(integ_buf.len);
1230 /* guess whether we're in the head or the tail: */
1231 if (snd_buf->page_len || snd_buf->tail[0].iov_len)
1232 iov = snd_buf->tail;
1234 iov = snd_buf->head;
1235 p = iov->iov_base + iov->iov_len;
1236 mic.data = (u8 *)(p + 1);
1238 maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic);
1239 status = -EIO; /* XXX? */
1240 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1241 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1244 q = xdr_encode_opaque(p, NULL, mic.len);
1246 offset = (u8 *)q - (u8 *)p;
1247 iov->iov_len += offset;
1248 snd_buf->len += offset;
1253 priv_release_snd_buf(struct rpc_rqst *rqstp)
1257 for (i=0; i < rqstp->rq_enc_pages_num; i++)
1258 __free_page(rqstp->rq_enc_pages[i]);
1259 kfree(rqstp->rq_enc_pages);
1263 alloc_enc_pages(struct rpc_rqst *rqstp)
1265 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
1268 if (snd_buf->page_len == 0) {
1269 rqstp->rq_enc_pages_num = 0;
1273 first = snd_buf->page_base >> PAGE_CACHE_SHIFT;
1274 last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT;
1275 rqstp->rq_enc_pages_num = last - first + 1 + 1;
1277 = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *),
1279 if (!rqstp->rq_enc_pages)
1281 for (i=0; i < rqstp->rq_enc_pages_num; i++) {
1282 rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS);
1283 if (rqstp->rq_enc_pages[i] == NULL)
1286 rqstp->rq_release_snd_buf = priv_release_snd_buf;
1289 rqstp->rq_enc_pages_num = i;
1290 priv_release_snd_buf(rqstp);
1296 gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1297 kxdrproc_t encode, struct rpc_rqst *rqstp, __be32 *p, void *obj)
1299 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
1304 struct page **inpages;
1311 offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base;
1312 *p++ = htonl(rqstp->rq_seqno);
1314 status = encode(rqstp, p, obj);
1318 status = alloc_enc_pages(rqstp);
1321 first = snd_buf->page_base >> PAGE_CACHE_SHIFT;
1322 inpages = snd_buf->pages + first;
1323 snd_buf->pages = rqstp->rq_enc_pages;
1324 snd_buf->page_base -= first << PAGE_CACHE_SHIFT;
1326 * Give the tail its own page, in case we need extra space in the
1327 * head when wrapping:
1329 * call_allocate() allocates twice the slack space required
1330 * by the authentication flavor to rq_callsize.
1331 * For GSS, slack is GSS_CRED_SLACK.
1333 if (snd_buf->page_len || snd_buf->tail[0].iov_len) {
1334 tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]);
1335 memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len);
1336 snd_buf->tail[0].iov_base = tmp;
1338 maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages);
1339 /* slack space should prevent this ever happening: */
1340 BUG_ON(snd_buf->len > snd_buf->buflen);
1342 /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was
1343 * done anyway, so it's safe to put the request on the wire: */
1344 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1345 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1349 *opaque_len = htonl(snd_buf->len - offset);
1350 /* guess whether we're in the head or the tail: */
1351 if (snd_buf->page_len || snd_buf->tail[0].iov_len)
1352 iov = snd_buf->tail;
1354 iov = snd_buf->head;
1355 p = iov->iov_base + iov->iov_len;
1356 pad = 3 - ((snd_buf->len - offset - 1) & 3);
1358 iov->iov_len += pad;
1359 snd_buf->len += pad;
1365 gss_wrap_req(struct rpc_task *task,
1366 kxdrproc_t encode, void *rqstp, __be32 *p, void *obj)
1368 struct rpc_cred *cred = task->tk_msg.rpc_cred;
1369 struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
1371 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1374 dprintk("RPC: %5u gss_wrap_req\n", task->tk_pid);
1375 if (ctx->gc_proc != RPC_GSS_PROC_DATA) {
1376 /* The spec seems a little ambiguous here, but I think that not
1377 * wrapping context destruction requests makes the most sense.
1379 status = encode(rqstp, p, obj);
1382 switch (gss_cred->gc_service) {
1383 case RPC_GSS_SVC_NONE:
1384 status = encode(rqstp, p, obj);
1386 case RPC_GSS_SVC_INTEGRITY:
1387 status = gss_wrap_req_integ(cred, ctx, encode,
1390 case RPC_GSS_SVC_PRIVACY:
1391 status = gss_wrap_req_priv(cred, ctx, encode,
1397 dprintk("RPC: %5u gss_wrap_req returning %d\n", task->tk_pid, status);
1402 gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1403 struct rpc_rqst *rqstp, __be32 **p)
1405 struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf;
1406 struct xdr_buf integ_buf;
1407 struct xdr_netobj mic;
1408 u32 data_offset, mic_offset;
1413 integ_len = ntohl(*(*p)++);
1416 data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base;
1417 mic_offset = integ_len + data_offset;
1418 if (mic_offset > rcv_buf->len)
1420 if (ntohl(*(*p)++) != rqstp->rq_seqno)
1423 if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset,
1424 mic_offset - data_offset))
1427 if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset))
1430 maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic);
1431 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1432 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1433 if (maj_stat != GSS_S_COMPLETE)
1439 gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1440 struct rpc_rqst *rqstp, __be32 **p)
1442 struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf;
1448 opaque_len = ntohl(*(*p)++);
1449 offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base;
1450 if (offset + opaque_len > rcv_buf->len)
1452 /* remove padding: */
1453 rcv_buf->len = offset + opaque_len;
1455 maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf);
1456 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1457 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1458 if (maj_stat != GSS_S_COMPLETE)
1460 if (ntohl(*(*p)++) != rqstp->rq_seqno)
1468 gss_unwrap_resp(struct rpc_task *task,
1469 kxdrproc_t decode, void *rqstp, __be32 *p, void *obj)
1471 struct rpc_cred *cred = task->tk_msg.rpc_cred;
1472 struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
1474 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1476 struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head;
1477 int savedlen = head->iov_len;
1480 if (ctx->gc_proc != RPC_GSS_PROC_DATA)
1482 switch (gss_cred->gc_service) {
1483 case RPC_GSS_SVC_NONE:
1485 case RPC_GSS_SVC_INTEGRITY:
1486 status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p);
1490 case RPC_GSS_SVC_PRIVACY:
1491 status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p);
1496 /* take into account extra slack for integrity and privacy cases: */
1497 cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp)
1498 + (savedlen - head->iov_len);
1500 status = decode(rqstp, p, obj);
1503 dprintk("RPC: %5u gss_unwrap_resp returning %d\n", task->tk_pid,
1508 static const struct rpc_authops authgss_ops = {
1509 .owner = THIS_MODULE,
1510 .au_flavor = RPC_AUTH_GSS,
1511 .au_name = "RPCSEC_GSS",
1512 .create = gss_create,
1513 .destroy = gss_destroy,
1514 .lookup_cred = gss_lookup_cred,
1515 .crcreate = gss_create_cred
1518 static const struct rpc_credops gss_credops = {
1519 .cr_name = "AUTH_GSS",
1520 .crdestroy = gss_destroy_cred,
1521 .cr_init = gss_cred_init,
1522 .crbind = rpcauth_generic_bind_cred,
1523 .crmatch = gss_match,
1524 .crmarshal = gss_marshal,
1525 .crrefresh = gss_refresh,
1526 .crvalidate = gss_validate,
1527 .crwrap_req = gss_wrap_req,
1528 .crunwrap_resp = gss_unwrap_resp,
1531 static const struct rpc_credops gss_nullops = {
1532 .cr_name = "AUTH_GSS",
1533 .crdestroy = gss_destroy_nullcred,
1534 .crbind = rpcauth_generic_bind_cred,
1535 .crmatch = gss_match,
1536 .crmarshal = gss_marshal,
1537 .crrefresh = gss_refresh_null,
1538 .crvalidate = gss_validate,
1539 .crwrap_req = gss_wrap_req,
1540 .crunwrap_resp = gss_unwrap_resp,
1543 static const struct rpc_pipe_ops gss_upcall_ops_v0 = {
1544 .upcall = gss_pipe_upcall,
1545 .downcall = gss_pipe_downcall,
1546 .destroy_msg = gss_pipe_destroy_msg,
1547 .open_pipe = gss_pipe_open_v0,
1548 .release_pipe = gss_pipe_release,
1551 static const struct rpc_pipe_ops gss_upcall_ops_v1 = {
1552 .upcall = gss_pipe_upcall,
1553 .downcall = gss_pipe_downcall,
1554 .destroy_msg = gss_pipe_destroy_msg,
1555 .open_pipe = gss_pipe_open_v1,
1556 .release_pipe = gss_pipe_release,
1560 * Initialize RPCSEC_GSS module
1562 static int __init init_rpcsec_gss(void)
1566 err = rpcauth_register(&authgss_ops);
1569 err = gss_svc_init();
1571 goto out_unregister;
1572 rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version");
1575 rpcauth_unregister(&authgss_ops);
1580 static void __exit exit_rpcsec_gss(void)
1583 rpcauth_unregister(&authgss_ops);
1584 rcu_barrier(); /* Wait for completion of call_rcu()'s */
1587 MODULE_LICENSE("GPL");
1588 module_init(init_rpcsec_gss)
1589 module_exit(exit_rpcsec_gss)