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, "enctypes=%s ", 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);
566 if (pipe_version < 0) {
574 if (IS_ERR(gss_msg)) {
575 err = PTR_ERR(gss_msg);
578 inode = &gss_msg->inode->vfs_inode;
580 prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_INTERRUPTIBLE);
581 spin_lock(&inode->i_lock);
582 if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) {
585 spin_unlock(&inode->i_lock);
593 gss_cred_set_ctx(cred, gss_msg->ctx);
595 err = gss_msg->msg.errno;
596 spin_unlock(&inode->i_lock);
598 finish_wait(&gss_msg->waitqueue, &wait);
599 gss_release_msg(gss_msg);
601 dprintk("RPC: gss_create_upcall for uid %u result %d\n",
607 gss_pipe_upcall(struct file *filp, struct rpc_pipe_msg *msg,
608 char __user *dst, size_t buflen)
610 char *data = (char *)msg->data + msg->copied;
611 size_t mlen = min(msg->len, buflen);
614 left = copy_to_user(dst, data, mlen);
616 msg->errno = -EFAULT;
626 #define MSG_BUF_MAXSIZE 1024
629 gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
633 struct gss_upcall_msg *gss_msg;
634 struct inode *inode = filp->f_path.dentry->d_inode;
635 struct gss_cl_ctx *ctx;
637 ssize_t err = -EFBIG;
639 if (mlen > MSG_BUF_MAXSIZE)
642 buf = kmalloc(mlen, GFP_NOFS);
647 if (copy_from_user(buf, src, mlen))
650 end = (const void *)((char *)buf + mlen);
651 p = simple_get_bytes(buf, end, &uid, sizeof(uid));
658 ctx = gss_alloc_context();
663 /* Find a matching upcall */
664 spin_lock(&inode->i_lock);
665 gss_msg = __gss_find_upcall(RPC_I(inode), uid);
666 if (gss_msg == NULL) {
667 spin_unlock(&inode->i_lock);
670 list_del_init(&gss_msg->list);
671 spin_unlock(&inode->i_lock);
673 p = gss_fill_context(p, end, ctx, gss_msg->auth->mech);
679 gss_msg->msg.errno = err;
686 gss_msg->msg.errno = -EAGAIN;
689 printk(KERN_CRIT "%s: bad return from "
690 "gss_fill_context: %zd\n", __func__, err);
693 goto err_release_msg;
695 gss_msg->ctx = gss_get_ctx(ctx);
699 spin_lock(&inode->i_lock);
700 __gss_unhash_msg(gss_msg);
701 spin_unlock(&inode->i_lock);
702 gss_release_msg(gss_msg);
708 dprintk("RPC: gss_pipe_downcall returning %Zd\n", err);
712 static int gss_pipe_open(struct inode *inode, int new_version)
716 spin_lock(&pipe_version_lock);
717 if (pipe_version < 0) {
718 /* First open of any gss pipe determines the version: */
719 pipe_version = new_version;
720 rpc_wake_up(&pipe_version_rpc_waitqueue);
721 wake_up(&pipe_version_waitqueue);
722 } else if (pipe_version != new_version) {
723 /* Trying to open a pipe of a different version */
727 atomic_inc(&pipe_users);
729 spin_unlock(&pipe_version_lock);
734 static int gss_pipe_open_v0(struct inode *inode)
736 return gss_pipe_open(inode, 0);
739 static int gss_pipe_open_v1(struct inode *inode)
741 return gss_pipe_open(inode, 1);
745 gss_pipe_release(struct inode *inode)
747 struct rpc_inode *rpci = RPC_I(inode);
748 struct gss_upcall_msg *gss_msg;
751 spin_lock(&inode->i_lock);
752 list_for_each_entry(gss_msg, &rpci->in_downcall, list) {
754 if (!list_empty(&gss_msg->msg.list))
756 gss_msg->msg.errno = -EPIPE;
757 atomic_inc(&gss_msg->count);
758 __gss_unhash_msg(gss_msg);
759 spin_unlock(&inode->i_lock);
760 gss_release_msg(gss_msg);
763 spin_unlock(&inode->i_lock);
769 gss_pipe_destroy_msg(struct rpc_pipe_msg *msg)
771 struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg);
773 if (msg->errno < 0) {
774 dprintk("RPC: gss_pipe_destroy_msg releasing msg %p\n",
776 atomic_inc(&gss_msg->count);
777 gss_unhash_msg(gss_msg);
778 if (msg->errno == -ETIMEDOUT)
780 gss_release_msg(gss_msg);
785 * NOTE: we have the opportunity to use different
786 * parameters based on the input flavor (which must be a pseudoflavor)
788 static struct rpc_auth *
789 gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
791 struct gss_auth *gss_auth;
792 struct rpc_auth * auth;
793 int err = -ENOMEM; /* XXX? */
795 dprintk("RPC: creating GSS authenticator for client %p\n", clnt);
797 if (!try_module_get(THIS_MODULE))
799 if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL)))
801 gss_auth->client = clnt;
803 gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor);
804 if (!gss_auth->mech) {
805 printk(KERN_WARNING "%s: Pseudoflavor %d not found!\n",
809 gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor);
810 if (gss_auth->service == 0)
812 auth = &gss_auth->rpc_auth;
813 auth->au_cslack = GSS_CRED_SLACK >> 2;
814 auth->au_rslack = GSS_VERF_SLACK >> 2;
815 auth->au_ops = &authgss_ops;
816 auth->au_flavor = flavor;
817 atomic_set(&auth->au_count, 1);
818 kref_init(&gss_auth->kref);
821 * Note: if we created the old pipe first, then someone who
822 * examined the directory at the right moment might conclude
823 * that we supported only the old pipe. So we instead create
824 * the new pipe first.
826 gss_auth->dentry[1] = rpc_mkpipe(clnt->cl_path.dentry,
828 clnt, &gss_upcall_ops_v1,
829 RPC_PIPE_WAIT_FOR_OPEN);
830 if (IS_ERR(gss_auth->dentry[1])) {
831 err = PTR_ERR(gss_auth->dentry[1]);
835 gss_auth->dentry[0] = rpc_mkpipe(clnt->cl_path.dentry,
836 gss_auth->mech->gm_name,
837 clnt, &gss_upcall_ops_v0,
838 RPC_PIPE_WAIT_FOR_OPEN);
839 if (IS_ERR(gss_auth->dentry[0])) {
840 err = PTR_ERR(gss_auth->dentry[0]);
841 goto err_unlink_pipe_1;
843 err = rpcauth_init_credcache(auth);
845 goto err_unlink_pipe_0;
849 rpc_unlink(gss_auth->dentry[0]);
851 rpc_unlink(gss_auth->dentry[1]);
853 gss_mech_put(gss_auth->mech);
857 module_put(THIS_MODULE);
862 gss_free(struct gss_auth *gss_auth)
864 rpc_unlink(gss_auth->dentry[1]);
865 rpc_unlink(gss_auth->dentry[0]);
866 gss_mech_put(gss_auth->mech);
869 module_put(THIS_MODULE);
873 gss_free_callback(struct kref *kref)
875 struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref);
881 gss_destroy(struct rpc_auth *auth)
883 struct gss_auth *gss_auth;
885 dprintk("RPC: destroying GSS authenticator %p flavor %d\n",
886 auth, auth->au_flavor);
888 rpcauth_destroy_credcache(auth);
890 gss_auth = container_of(auth, struct gss_auth, rpc_auth);
891 kref_put(&gss_auth->kref, gss_free_callback);
895 * gss_destroying_context will cause the RPCSEC_GSS to send a NULL RPC call
896 * to the server with the GSS control procedure field set to
897 * RPC_GSS_PROC_DESTROY. This should normally cause the server to release
898 * all RPCSEC_GSS state associated with that context.
901 gss_destroying_context(struct rpc_cred *cred)
903 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
904 struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth);
905 struct rpc_task *task;
907 if (gss_cred->gc_ctx == NULL ||
908 test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0)
911 gss_cred->gc_ctx->gc_proc = RPC_GSS_PROC_DESTROY;
912 cred->cr_ops = &gss_nullops;
914 /* Take a reference to ensure the cred will be destroyed either
915 * by the RPC call or by the put_rpccred() below */
918 task = rpc_call_null(gss_auth->client, cred, RPC_TASK_ASYNC|RPC_TASK_SOFT);
926 /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure
927 * to create a new cred or context, so they check that things have been
928 * allocated before freeing them. */
930 gss_do_free_ctx(struct gss_cl_ctx *ctx)
932 dprintk("RPC: gss_free_ctx\n");
934 gss_delete_sec_context(&ctx->gc_gss_ctx);
935 kfree(ctx->gc_wire_ctx.data);
940 gss_free_ctx_callback(struct rcu_head *head)
942 struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu);
943 gss_do_free_ctx(ctx);
947 gss_free_ctx(struct gss_cl_ctx *ctx)
949 call_rcu(&ctx->gc_rcu, gss_free_ctx_callback);
953 gss_free_cred(struct gss_cred *gss_cred)
955 dprintk("RPC: gss_free_cred %p\n", gss_cred);
960 gss_free_cred_callback(struct rcu_head *head)
962 struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu);
963 gss_free_cred(gss_cred);
967 gss_destroy_nullcred(struct rpc_cred *cred)
969 struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
970 struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth);
971 struct gss_cl_ctx *ctx = gss_cred->gc_ctx;
973 rcu_assign_pointer(gss_cred->gc_ctx, NULL);
974 call_rcu(&cred->cr_rcu, gss_free_cred_callback);
977 kref_put(&gss_auth->kref, gss_free_callback);
981 gss_destroy_cred(struct rpc_cred *cred)
984 if (gss_destroying_context(cred))
986 gss_destroy_nullcred(cred);
990 * Lookup RPCSEC_GSS cred for the current process
992 static struct rpc_cred *
993 gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
995 return rpcauth_lookup_credcache(auth, acred, flags);
998 static struct rpc_cred *
999 gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
1001 struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth);
1002 struct gss_cred *cred = NULL;
1005 dprintk("RPC: gss_create_cred for uid %d, flavor %d\n",
1006 acred->uid, auth->au_flavor);
1008 if (!(cred = kzalloc(sizeof(*cred), GFP_NOFS)))
1011 rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops);
1013 * Note: in order to force a call to call_refresh(), we deliberately
1014 * fail to flag the credential as RPCAUTH_CRED_UPTODATE.
1016 cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW;
1017 cred->gc_service = gss_auth->service;
1018 cred->gc_machine_cred = acred->machine_cred;
1019 kref_get(&gss_auth->kref);
1020 return &cred->gc_base;
1023 dprintk("RPC: gss_create_cred failed with error %d\n", err);
1024 return ERR_PTR(err);
1028 gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred)
1030 struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth);
1031 struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base);
1035 err = gss_create_upcall(gss_auth, gss_cred);
1036 } while (err == -EAGAIN);
1041 gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags)
1043 struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base);
1045 if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags))
1047 /* Don't match with creds that have expired. */
1048 if (time_after(jiffies, gss_cred->gc_ctx->gc_expiry))
1050 if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags))
1053 if (acred->machine_cred != gss_cred->gc_machine_cred)
1055 return rc->cr_uid == acred->uid;
1059 * Marshal credentials.
1060 * Maybe we should keep a cached credential for performance reasons.
1063 gss_marshal(struct rpc_task *task, __be32 *p)
1065 struct rpc_rqst *req = task->tk_rqstp;
1066 struct rpc_cred *cred = req->rq_cred;
1067 struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
1069 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1072 struct xdr_netobj mic;
1074 struct xdr_buf verf_buf;
1076 dprintk("RPC: %5u gss_marshal\n", task->tk_pid);
1078 *p++ = htonl(RPC_AUTH_GSS);
1081 spin_lock(&ctx->gc_seq_lock);
1082 req->rq_seqno = ctx->gc_seq++;
1083 spin_unlock(&ctx->gc_seq_lock);
1085 *p++ = htonl((u32) RPC_GSS_VERSION);
1086 *p++ = htonl((u32) ctx->gc_proc);
1087 *p++ = htonl((u32) req->rq_seqno);
1088 *p++ = htonl((u32) gss_cred->gc_service);
1089 p = xdr_encode_netobj(p, &ctx->gc_wire_ctx);
1090 *cred_len = htonl((p - (cred_len + 1)) << 2);
1092 /* We compute the checksum for the verifier over the xdr-encoded bytes
1093 * starting with the xid and ending at the end of the credential: */
1094 iov.iov_base = xprt_skip_transport_header(task->tk_xprt,
1095 req->rq_snd_buf.head[0].iov_base);
1096 iov.iov_len = (u8 *)p - (u8 *)iov.iov_base;
1097 xdr_buf_from_iov(&iov, &verf_buf);
1099 /* set verifier flavor*/
1100 *p++ = htonl(RPC_AUTH_GSS);
1102 mic.data = (u8 *)(p + 1);
1103 maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic);
1104 if (maj_stat == GSS_S_CONTEXT_EXPIRED) {
1105 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1106 } else if (maj_stat != 0) {
1107 printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat);
1110 p = xdr_encode_opaque(p, NULL, mic.len);
1118 static int gss_renew_cred(struct rpc_task *task)
1120 struct rpc_cred *oldcred = task->tk_rqstp->rq_cred;
1121 struct gss_cred *gss_cred = container_of(oldcred,
1124 struct rpc_auth *auth = oldcred->cr_auth;
1125 struct auth_cred acred = {
1126 .uid = oldcred->cr_uid,
1127 .machine_cred = gss_cred->gc_machine_cred,
1129 struct rpc_cred *new;
1131 new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW);
1133 return PTR_ERR(new);
1134 task->tk_rqstp->rq_cred = new;
1135 put_rpccred(oldcred);
1139 static int gss_cred_is_negative_entry(struct rpc_cred *cred)
1141 if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) {
1142 unsigned long now = jiffies;
1143 unsigned long begin, expire;
1144 struct gss_cred *gss_cred;
1146 gss_cred = container_of(cred, struct gss_cred, gc_base);
1147 begin = gss_cred->gc_upcall_timestamp;
1148 expire = begin + gss_expired_cred_retry_delay * HZ;
1150 if (time_in_range_open(now, begin, expire))
1157 * Refresh credentials. XXX - finish
1160 gss_refresh(struct rpc_task *task)
1162 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
1165 if (gss_cred_is_negative_entry(cred))
1166 return -EKEYEXPIRED;
1168 if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) &&
1169 !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) {
1170 ret = gss_renew_cred(task);
1173 cred = task->tk_rqstp->rq_cred;
1176 if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags))
1177 ret = gss_refresh_upcall(task);
1182 /* Dummy refresh routine: used only when destroying the context */
1184 gss_refresh_null(struct rpc_task *task)
1190 gss_validate(struct rpc_task *task, __be32 *p)
1192 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
1193 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1196 struct xdr_buf verf_buf;
1197 struct xdr_netobj mic;
1201 dprintk("RPC: %5u gss_validate\n", task->tk_pid);
1204 if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE)
1206 if (flav != RPC_AUTH_GSS)
1208 seq = htonl(task->tk_rqstp->rq_seqno);
1209 iov.iov_base = &seq;
1210 iov.iov_len = sizeof(seq);
1211 xdr_buf_from_iov(&iov, &verf_buf);
1215 maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic);
1216 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1217 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1219 dprintk("RPC: %5u gss_validate: gss_verify_mic returned "
1220 "error 0x%08x\n", task->tk_pid, maj_stat);
1223 /* We leave it to unwrap to calculate au_rslack. For now we just
1224 * calculate the length of the verifier: */
1225 cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2;
1227 dprintk("RPC: %5u gss_validate: gss_verify_mic succeeded.\n",
1229 return p + XDR_QUADLEN(len);
1232 dprintk("RPC: %5u gss_validate failed.\n", task->tk_pid);
1236 static void gss_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp,
1237 __be32 *p, void *obj)
1239 struct xdr_stream xdr;
1241 xdr_init_encode(&xdr, &rqstp->rq_snd_buf, p);
1242 encode(rqstp, &xdr, obj);
1246 gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1247 kxdreproc_t encode, struct rpc_rqst *rqstp,
1248 __be32 *p, void *obj)
1250 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
1251 struct xdr_buf integ_buf;
1252 __be32 *integ_len = NULL;
1253 struct xdr_netobj mic;
1261 offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base;
1262 *p++ = htonl(rqstp->rq_seqno);
1264 gss_wrap_req_encode(encode, rqstp, p, obj);
1266 if (xdr_buf_subsegment(snd_buf, &integ_buf,
1267 offset, snd_buf->len - offset))
1269 *integ_len = htonl(integ_buf.len);
1271 /* guess whether we're in the head or the tail: */
1272 if (snd_buf->page_len || snd_buf->tail[0].iov_len)
1273 iov = snd_buf->tail;
1275 iov = snd_buf->head;
1276 p = iov->iov_base + iov->iov_len;
1277 mic.data = (u8 *)(p + 1);
1279 maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic);
1280 status = -EIO; /* XXX? */
1281 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1282 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1285 q = xdr_encode_opaque(p, NULL, mic.len);
1287 offset = (u8 *)q - (u8 *)p;
1288 iov->iov_len += offset;
1289 snd_buf->len += offset;
1294 priv_release_snd_buf(struct rpc_rqst *rqstp)
1298 for (i=0; i < rqstp->rq_enc_pages_num; i++)
1299 __free_page(rqstp->rq_enc_pages[i]);
1300 kfree(rqstp->rq_enc_pages);
1304 alloc_enc_pages(struct rpc_rqst *rqstp)
1306 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
1309 if (snd_buf->page_len == 0) {
1310 rqstp->rq_enc_pages_num = 0;
1314 first = snd_buf->page_base >> PAGE_CACHE_SHIFT;
1315 last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT;
1316 rqstp->rq_enc_pages_num = last - first + 1 + 1;
1318 = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *),
1320 if (!rqstp->rq_enc_pages)
1322 for (i=0; i < rqstp->rq_enc_pages_num; i++) {
1323 rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS);
1324 if (rqstp->rq_enc_pages[i] == NULL)
1327 rqstp->rq_release_snd_buf = priv_release_snd_buf;
1330 rqstp->rq_enc_pages_num = i;
1331 priv_release_snd_buf(rqstp);
1337 gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1338 kxdreproc_t encode, struct rpc_rqst *rqstp,
1339 __be32 *p, void *obj)
1341 struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
1346 struct page **inpages;
1353 offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base;
1354 *p++ = htonl(rqstp->rq_seqno);
1356 gss_wrap_req_encode(encode, rqstp, p, obj);
1358 status = alloc_enc_pages(rqstp);
1361 first = snd_buf->page_base >> PAGE_CACHE_SHIFT;
1362 inpages = snd_buf->pages + first;
1363 snd_buf->pages = rqstp->rq_enc_pages;
1364 snd_buf->page_base -= first << PAGE_CACHE_SHIFT;
1366 * Give the tail its own page, in case we need extra space in the
1367 * head when wrapping:
1369 * call_allocate() allocates twice the slack space required
1370 * by the authentication flavor to rq_callsize.
1371 * For GSS, slack is GSS_CRED_SLACK.
1373 if (snd_buf->page_len || snd_buf->tail[0].iov_len) {
1374 tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]);
1375 memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len);
1376 snd_buf->tail[0].iov_base = tmp;
1378 maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages);
1379 /* slack space should prevent this ever happening: */
1380 BUG_ON(snd_buf->len > snd_buf->buflen);
1382 /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was
1383 * done anyway, so it's safe to put the request on the wire: */
1384 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1385 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1389 *opaque_len = htonl(snd_buf->len - offset);
1390 /* guess whether we're in the head or the tail: */
1391 if (snd_buf->page_len || snd_buf->tail[0].iov_len)
1392 iov = snd_buf->tail;
1394 iov = snd_buf->head;
1395 p = iov->iov_base + iov->iov_len;
1396 pad = 3 - ((snd_buf->len - offset - 1) & 3);
1398 iov->iov_len += pad;
1399 snd_buf->len += pad;
1405 gss_wrap_req(struct rpc_task *task,
1406 kxdreproc_t encode, void *rqstp, __be32 *p, void *obj)
1408 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
1409 struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
1411 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1414 dprintk("RPC: %5u gss_wrap_req\n", task->tk_pid);
1415 if (ctx->gc_proc != RPC_GSS_PROC_DATA) {
1416 /* The spec seems a little ambiguous here, but I think that not
1417 * wrapping context destruction requests makes the most sense.
1419 gss_wrap_req_encode(encode, rqstp, p, obj);
1423 switch (gss_cred->gc_service) {
1424 case RPC_GSS_SVC_NONE:
1425 gss_wrap_req_encode(encode, rqstp, p, obj);
1428 case RPC_GSS_SVC_INTEGRITY:
1429 status = gss_wrap_req_integ(cred, ctx, encode,
1432 case RPC_GSS_SVC_PRIVACY:
1433 status = gss_wrap_req_priv(cred, ctx, encode,
1439 dprintk("RPC: %5u gss_wrap_req returning %d\n", task->tk_pid, status);
1444 gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1445 struct rpc_rqst *rqstp, __be32 **p)
1447 struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf;
1448 struct xdr_buf integ_buf;
1449 struct xdr_netobj mic;
1450 u32 data_offset, mic_offset;
1455 integ_len = ntohl(*(*p)++);
1458 data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base;
1459 mic_offset = integ_len + data_offset;
1460 if (mic_offset > rcv_buf->len)
1462 if (ntohl(*(*p)++) != rqstp->rq_seqno)
1465 if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset,
1466 mic_offset - data_offset))
1469 if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset))
1472 maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic);
1473 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1474 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1475 if (maj_stat != GSS_S_COMPLETE)
1481 gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
1482 struct rpc_rqst *rqstp, __be32 **p)
1484 struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf;
1490 opaque_len = ntohl(*(*p)++);
1491 offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base;
1492 if (offset + opaque_len > rcv_buf->len)
1494 /* remove padding: */
1495 rcv_buf->len = offset + opaque_len;
1497 maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf);
1498 if (maj_stat == GSS_S_CONTEXT_EXPIRED)
1499 clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
1500 if (maj_stat != GSS_S_COMPLETE)
1502 if (ntohl(*(*p)++) != rqstp->rq_seqno)
1509 gss_unwrap_req_decode(kxdrdproc_t decode, struct rpc_rqst *rqstp,
1510 __be32 *p, void *obj)
1512 struct xdr_stream xdr;
1514 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
1515 return decode(rqstp, &xdr, obj);
1519 gss_unwrap_resp(struct rpc_task *task,
1520 kxdrdproc_t decode, void *rqstp, __be32 *p, void *obj)
1522 struct rpc_cred *cred = task->tk_rqstp->rq_cred;
1523 struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
1525 struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
1527 struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head;
1528 int savedlen = head->iov_len;
1531 if (ctx->gc_proc != RPC_GSS_PROC_DATA)
1533 switch (gss_cred->gc_service) {
1534 case RPC_GSS_SVC_NONE:
1536 case RPC_GSS_SVC_INTEGRITY:
1537 status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p);
1541 case RPC_GSS_SVC_PRIVACY:
1542 status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p);
1547 /* take into account extra slack for integrity and privacy cases: */
1548 cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp)
1549 + (savedlen - head->iov_len);
1551 status = gss_unwrap_req_decode(decode, rqstp, p, obj);
1554 dprintk("RPC: %5u gss_unwrap_resp returning %d\n", task->tk_pid,
1559 static const struct rpc_authops authgss_ops = {
1560 .owner = THIS_MODULE,
1561 .au_flavor = RPC_AUTH_GSS,
1562 .au_name = "RPCSEC_GSS",
1563 .create = gss_create,
1564 .destroy = gss_destroy,
1565 .lookup_cred = gss_lookup_cred,
1566 .crcreate = gss_create_cred
1569 static const struct rpc_credops gss_credops = {
1570 .cr_name = "AUTH_GSS",
1571 .crdestroy = gss_destroy_cred,
1572 .cr_init = gss_cred_init,
1573 .crbind = rpcauth_generic_bind_cred,
1574 .crmatch = gss_match,
1575 .crmarshal = gss_marshal,
1576 .crrefresh = gss_refresh,
1577 .crvalidate = gss_validate,
1578 .crwrap_req = gss_wrap_req,
1579 .crunwrap_resp = gss_unwrap_resp,
1582 static const struct rpc_credops gss_nullops = {
1583 .cr_name = "AUTH_GSS",
1584 .crdestroy = gss_destroy_nullcred,
1585 .crbind = rpcauth_generic_bind_cred,
1586 .crmatch = gss_match,
1587 .crmarshal = gss_marshal,
1588 .crrefresh = gss_refresh_null,
1589 .crvalidate = gss_validate,
1590 .crwrap_req = gss_wrap_req,
1591 .crunwrap_resp = gss_unwrap_resp,
1594 static const struct rpc_pipe_ops gss_upcall_ops_v0 = {
1595 .upcall = gss_pipe_upcall,
1596 .downcall = gss_pipe_downcall,
1597 .destroy_msg = gss_pipe_destroy_msg,
1598 .open_pipe = gss_pipe_open_v0,
1599 .release_pipe = gss_pipe_release,
1602 static const struct rpc_pipe_ops gss_upcall_ops_v1 = {
1603 .upcall = gss_pipe_upcall,
1604 .downcall = gss_pipe_downcall,
1605 .destroy_msg = gss_pipe_destroy_msg,
1606 .open_pipe = gss_pipe_open_v1,
1607 .release_pipe = gss_pipe_release,
1611 * Initialize RPCSEC_GSS module
1613 static int __init init_rpcsec_gss(void)
1617 err = rpcauth_register(&authgss_ops);
1620 err = gss_svc_init();
1622 goto out_unregister;
1623 rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version");
1626 rpcauth_unregister(&authgss_ops);
1631 static void __exit exit_rpcsec_gss(void)
1634 rpcauth_unregister(&authgss_ops);
1635 rcu_barrier(); /* Wait for completion of call_rcu()'s */
1638 MODULE_LICENSE("GPL");
1639 module_param_named(expired_cred_retry_delay,
1640 gss_expired_cred_retry_delay,
1642 MODULE_PARM_DESC(expired_cred_retry_delay, "Timeout (in seconds) until "
1643 "the RPC engine retries an expired credential");
1645 module_init(init_rpcsec_gss)
1646 module_exit(exit_rpcsec_gss)