common/ktli/t_kunbind.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*  Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*    All Rights Reserved   */

/*
 * University Copyright- Copyright (c) 1982, 1986, 1988
 * The Regents of the University of California
 * All Rights Reserved
 *
 * University Acknowledgment- Portions of this document are derived from
 * software developed by the University of California, Berkeley, and its
 * contributors.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

/*
 * Kernel TLI-like function to unbind a transport endpoint
 * to an address.
 *
 * Returns 0 on success and ret is set if non-NULL,
 * else positive error code.
 */

#include <sys/param.h>
#include <sys/types.h>
#include <sys/proc.h>
#include <sys/file.h>
#include <sys/user.h>
#include <sys/errno.h>
#include <sys/stream.h>
#include <sys/strsubr.h>
#include <sys/ioctl.h>
#include <sys/stropts.h>
#include <sys/vnode.h>
#include <sys/tihdr.h>
#include <sys/timod.h>
#include <sys/tiuser.h>
#include <sys/t_kuser.h>
#include <sys/kmem.h>
#include <sys/sysmacros.h>


int
t_kunbind(TIUSER *tiptr)
{
    struct T_unbind_req *unbind_req;
    struct T_ok_ack     *ok_ack;
    int         unbindsz;
    vnode_t         *vp;
    file_t          *fp;
    char            *buf;
    struct strioctl     strioc;
    int         retval;
    int         error;

    error = 0;
    retval = 0;
    fp = tiptr->fp;
    vp = fp->f_vnode;

    /*
     * send the ioctl request and wait
     * for a reply.
     */
    unbindsz = MAX(TUNBINDREQSZ, TOKACKSZ);
    buf = kmem_alloc(unbindsz, KM_SLEEP);
    /* LINTED pointer alignment */
    unbind_req = (struct T_unbind_req *)buf;
    unbind_req->PRIM_type = T_UNBIND_REQ;

    strioc.ic_cmd = TI_UNBIND;
    strioc.ic_timout = 0;
    strioc.ic_dp = buf;
    strioc.ic_len = (int)TUNBINDREQSZ;

    error = strdoioctl(vp->v_stream, &strioc, FNATIVE, K_TO_K, CRED(),
        &retval);
    if (error)
        goto badbind;

    if (retval) {
        if ((retval & 0xff) == TSYSERR)
            error = (retval >> 8) & 0xff;
        else
            error = t_tlitosyserr(retval & 0xff);
        goto badbind;
    }

    /* LINTED pointer alignment */
    ok_ack = (struct T_ok_ack *)strioc.ic_dp;
    if (strioc.ic_len < TOKACKSZ ||
        ok_ack->PRIM_type != T_OK_ACK ||
        ok_ack->CORRECT_prim != T_UNBIND_REQ)
        error = EIO;

badbind:
    kmem_free(buf, unbindsz);
    return (error);
}