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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/types.h>
#include <sys/door.h>
#include <sys/note.h>
#include <sys/drctl.h>
#include <sys/drctl_impl.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/dr_util.h>
static door_handle_t drctl_dh; /* Door for upcalls */
int
i_drctl_ioctl(int cmd, intptr_t arg)
{
int rv;
drctl_setup_t setup_rqst;
switch (cmd) {
case DRCTL_IOCTL_CONNECT_SERVER:
if (ddi_copyin((caddr_t)arg,
&setup_rqst, sizeof (setup_rqst), 0) != 0) {
cmn_err(CE_WARN, "i_drctl_ioctl: ddi_copyin failed "
"for DRCTL_IOCTL_CONNECT_SERVER");
rv = EFAULT;
break;
}
drctl_dh = door_ki_lookup(setup_rqst.did);
rv = 0;
break;
default:
rv = EIO;
}
return (rv);
}
int
i_drctl_send(void *msg, size_t size, void **obufp, size_t *osize)
{
int up_err;
int rv = 0;
door_arg_t door_args;
door_handle_t dh = drctl_dh;
static const char me[] = "i_drctl_send";
retry:
if (dh)
door_ki_hold(dh);
else
return (EIO);
door_args.data_ptr = (char *)msg;
door_args.data_size = size;
door_args.desc_ptr = NULL;
door_args.desc_num = 0;
/*
* We don't know the size of the message the daemon
* will pass back to us. By setting rbuf to NULL,
* we force the door code to allocate a buf of the
* appropriate size. We must set rsize > 0, however,
* else the door code acts as if no response was
* expected and doesn't pass the data to us.
*/
door_args.rbuf = NULL;
door_args.rsize = 1;
DR_DBG_CTL("%s: msg %p size %ld obufp %p osize %p\n",
me, msg, size, (void *)obufp, (void *)osize);
up_err = door_ki_upcall_limited(dh, &door_args, NULL, SIZE_MAX, 0);
if (up_err == 0) {
if (door_args.rbuf == NULL)
goto done;
DR_DBG_CTL("%s: rbuf %p rsize %ld\n", me,
(void *)door_args.rbuf, door_args.rsize);
if (obufp != NULL) {
*obufp = door_args.rbuf;
*osize = door_args.rsize;
DR_DBG_KMEM("%s: (door) alloc addr %p size %ld\n",
__func__,
(void *)(door_args.rbuf), door_args.rsize);
} else {
/*
* No output buffer pointer was passed in,
* so the response buffer allocated by the
* door code must be deallocated.
*/
DR_DBG_KMEM("%s: free addr %p size %ld\n", __func__,
(void *)(door_args.rbuf), door_args.rsize);
kmem_free(door_args.rbuf, door_args.rsize);
}
} else {
switch (up_err) {
case EINTR:
DR_DBG_CTL("%s: door call returned EINTR\n", me);
/* FALLTHROUGH */
case EAGAIN:
/*
* Server process may be forking, try again.
*/
door_ki_rele(dh);
delay(hz);
goto retry;
case EBADF:
case EINVAL:
drctl_dh = NULL;
DR_DBG_CTL(
"%s: door call failed with %d\n", me, up_err);
rv = EIO;
break;
default:
DR_DBG_CTL("%s: unexpected return "
"code %d from door_ki_upcall\n", me, up_err);
rv = EIO;
break;
}
}
done:
door_ki_rele(dh);
return (rv);
}
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