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/*
* 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 initialize a transport
* endpoint using the protocol specified.
*
* Returns:
* 0 on success and "tiptr" is set to a valid transport pointer,
* else a 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/vnode.h>
#include <sys/errno.h>
#include <sys/stream.h>
#include <sys/ioctl.h>
#include <sys/stropts.h>
#include <sys/strsubr.h>
#include <sys/tihdr.h>
#include <sys/timod.h>
#include <sys/tiuser.h>
#include <sys/t_kuser.h>
#include <sys/kmem.h>
#include <sys/cmn_err.h>
static t_scalar_t _t_setsize(t_scalar_t);
int
t_kopen(file_t *fp, dev_t rdev, int flags, TIUSER **tiptr, cred_t *cr)
{
int madefp = 0;
struct T_info_ack inforeq;
int retval;
vnode_t *vp;
struct strioctl strioc;
int error;
TIUSER *ntiptr;
int rtries = 0;
/*
* Special case for install: miniroot needs to be able to access files
* via NFS as though it were always in the global zone.
*/
if (nfs_global_client_only != 0)
cr = kcred;
KTLILOG(2, "t_kopen: fp %x, ", fp);
KTLILOG(2, "rdev %x, ", rdev);
KTLILOG(2, "flags %x\n", flags);
*tiptr = NULL;
error = 0;
retval = 0;
if (fp == NULL) {
if (rdev == 0 || rdev == NODEV) {
KTLILOG(1, "t_kopen: null device\n", 0);
return (EINVAL);
}
/*
* allocate a file pointer, but
* no file descripter.
*/
if ((error = falloc(NULL, flags, &fp, NULL)) != 0) {
KTLILOG(1, "t_kopen: falloc: %d\n", error);
return (error);
}
/* Install proper cred in file */
if (cr != fp->f_cred) {
crhold(cr);
crfree(fp->f_cred);
fp->f_cred = cr;
}
vp = makespecvp(rdev, VCHR);
/*
* this will call the streams open for us.
* Want to retry if error is EAGAIN, the streams open routine
* might fail due to temporarely out of memory.
*/
do {
if ((error = VOP_OPEN(&vp, flags, cr)) == EAGAIN) {
(void) delay(hz);
}
} while (error == EAGAIN && ++rtries < 5);
if (error) {
KTLILOG(1, "t_kopen: VOP_OPEN: %d\n", error);
unfalloc(fp);
VN_RELE(vp);
return (error);
}
/*
* fp is completely initialized so drop the write lock.
* I actually don't need any locking on fp in here since
* there is no fd pointing at it. However, since I could
* call closef if there is an error and closef requires
* the fp read locked, I will acquire the read lock here
* and make sure I release it before I leave this routine.
*/
fp->f_vnode = vp;
mutex_exit(&fp->f_tlock);
madefp = 1;
} else {
vp = fp->f_vnode;
}
if (vp->v_stream == NULL) {
if (madefp)
(void) closef(fp);
KTLILOG(1, "t_kopen: not a streams device\n", 0);
return (ENOSTR);
}
/*
* allocate a new transport structure
*/
ntiptr = kmem_alloc(TIUSERSZ, KM_SLEEP);
ntiptr->fp = fp;
ntiptr->flags = madefp ? MADE_FP : 0;
KTLILOG(2, "t_kopen: vp %x, ", vp);
KTLILOG(2, "stp %x\n", vp->v_stream);
/*
* see if TIMOD is already pushed
*/
error = strioctl(vp, I_FIND, (intptr_t)"timod", 0, K_TO_K, cr, &retval);
if (error) {
kmem_free(ntiptr, TIUSERSZ);
if (madefp)
(void) closef(fp);
KTLILOG(1, "t_kopen: strioctl(I_FIND, timod): %d\n", error);
return (error);
}
if (retval == 0) {
tryagain:
error = strioctl(vp, I_PUSH, (intptr_t)"timod", 0, K_TO_K, cr,
&retval);
if (error) {
switch (error) {
case ENOSPC:
case EAGAIN:
case ENOSR:
/*
* This probably means the master file
* should be tuned.
*/
cmn_err(CE_WARN,
"t_kopen: I_PUSH of timod failed, error %d\n",
error);
(void) delay(hz);
error = 0;
goto tryagain;
default:
kmem_free(ntiptr, TIUSERSZ);
if (madefp)
(void) closef(fp);
KTLILOG(1, "t_kopen: I_PUSH (timod): %d",
error);
return (error);
}
}
}
inforeq.PRIM_type = T_INFO_REQ;
strioc.ic_cmd = TI_GETINFO;
strioc.ic_timout = 0;
strioc.ic_dp = (char *)&inforeq;
strioc.ic_len = (int)sizeof (struct T_info_req);
error = strdoioctl(vp->v_stream, &strioc, FNATIVE, K_TO_K, cr, &retval);
if (error) {
kmem_free(ntiptr, TIUSERSZ);
if (madefp)
(void) closef(fp);
KTLILOG(1, "t_kopen: strdoioctl(T_INFO_REQ): %d\n", error);
return (error);
}
if (retval) {
if ((retval & 0xff) == TSYSERR)
error = (retval >> 8) & 0xff;
else
error = t_tlitosyserr(retval & 0xff);
kmem_free(ntiptr, TIUSERSZ);
if (madefp)
(void) closef(fp);
KTLILOG(1, "t_kopen: strdoioctl(T_INFO_REQ): retval: 0x%x\n",
retval);
return (error);
}
if (strioc.ic_len != sizeof (struct T_info_ack)) {
kmem_free(ntiptr, TIUSERSZ);
if (madefp)
(void) closef(fp);
KTLILOG(1,
"t_kopen: strioc.ic_len != sizeof (struct T_info_ack): %d\n",
strioc.ic_len);
return (EPROTO);
}
ntiptr->tp_info.addr = _t_setsize(inforeq.ADDR_size);
ntiptr->tp_info.options = _t_setsize(inforeq.OPT_size);
ntiptr->tp_info.tsdu = _t_setsize(inforeq.TSDU_size);
ntiptr->tp_info.etsdu = _t_setsize(inforeq.ETSDU_size);
ntiptr->tp_info.connect = _t_setsize(inforeq.CDATA_size);
ntiptr->tp_info.discon = _t_setsize(inforeq.DDATA_size);
ntiptr->tp_info.servtype = inforeq.SERV_type;
*tiptr = ntiptr;
return (0);
}
#define DEFSIZE 128
static t_scalar_t
_t_setsize(t_scalar_t infosize)
{
switch (infosize) {
case -1:
return (DEFSIZE);
case -2:
return (0);
default:
return (infosize);
}
}
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