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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 (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright 2015, Joyent Inc.
* Copyright 2017 Nexenta Systems, Inc. All rights reserved.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* The kTLI "shim" over in ./fake_ktli.c uses getf(), releasef() to
* represent an open socket FD in "fake" vnode_t and file_t objects.
* This implements minimal getf()/releasef() shims for that purpose.
*/
#include <sys/types.h>
#include <sys/sysmacros.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/cred.h>
#include <sys/user.h>
#include <sys/vfs.h>
#include <sys/vnode.h>
#include <sys/file.h>
#include <sys/debug.h>
#include <sys/kmem.h>
#define FAKEFDS 256
kmutex_t ftlock;
file_t *ftab[FAKEFDS];
file_t *
getf(int fd)
{
file_t *fp;
vnode_t *vp;
if (fd >= FAKEFDS)
return (NULL);
mutex_enter(&ftlock);
if ((fp = ftab[fd]) != NULL) {
fp->f_count++;
mutex_exit(&ftlock);
return (fp);
}
fp = kmem_zalloc(sizeof (*fp), KM_SLEEP);
vp = kmem_zalloc(sizeof (*vp), KM_SLEEP);
vp->v_fd = fd;
fp->f_vnode = vp;
fp->f_count = 1;
ftab[fd] = fp;
mutex_exit(&ftlock);
return (fp);
}
void
releasef(int fd)
{
file_t *fp;
vnode_t *vp;
mutex_enter(&ftlock);
if ((fp = ftab[fd]) == NULL) {
mutex_exit(&ftlock);
return;
}
fp->f_count--;
if (fp->f_count > 0) {
mutex_exit(&ftlock);
return;
}
ftab[fd] = NULL;
mutex_exit(&ftlock);
vp = fp->f_vnode;
kmem_free(vp, sizeof (*vp));
kmem_free(fp, sizeof (*fp));
}
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