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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.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/cred.h>
#include <sys/vfs.h>
#include <sys/vfs_opreg.h>
#include <sys/gfs.h>
#include <sys/vnode.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/sysmacros.h>
#include <fs/fs_subr.h>
#include <sys/contract.h>
#include <sys/contract_impl.h>
#include <sys/ctfs.h>
#include <sys/ctfs_impl.h>
#include <sys/file.h>
/*
* CTFS routines for the /system/contract/<type>/latest vnode.
*/
/*
* ctfs_create_latenode
*/
vnode_t *
ctfs_create_latenode(vnode_t *pvp)
{
return (gfs_file_create(sizeof (ctfs_latenode_t), pvp,
ctfs_ops_latest));
}
/*
* ctfs_latest_nested_open
*
* The latest node is just a doorway to the status file; this function
* is used by ctfs_latest_access, ctfs_latest_open, and
* ctfs_latest_getattr to obtain that file.
*/
static vnode_t *
ctfs_latest_nested_open(vnode_t *vp, cred_t *cr)
{
contract_t *ct = ttolwp(curthread)->lwp_ct_latest[
gfs_file_index(gfs_file_parent(vp))];
if (ct) {
vnode_t *cvp, *svp;
cvp = ctfs_create_cdirnode(gfs_file_parent(vp), ct);
gfs_file_set_index(cvp, -1);
VERIFY(gfs_dir_lookup(cvp, "status", &svp,
cr, 0, NULL, NULL) == 0);
VN_RELE(cvp);
return (svp);
}
return (NULL);
}
/*
* ctfs_latest_access - VOP_ACCESS entry point
*
* Fails if there isn't a latest contract.
*/
/* ARGSUSED */
static int
ctfs_latest_access(
vnode_t *vp,
int mode,
int flags,
cred_t *cr,
caller_context_t *ct)
{
vnode_t *nvp;
if (mode & (VEXEC | VWRITE))
return (EACCES);
if (nvp = ctfs_latest_nested_open(vp, cr)) {
VN_RELE(nvp);
return (0);
}
return (ESRCH);
}
/*
* ctfs_latest_open - VOP_OPEN entry point
*
* After checking the mode bits, opens and returns the status file for
* the LWP's latest contract.
*/
static int
ctfs_latest_open(vnode_t **vpp, int flag, cred_t *cr, caller_context_t *ct)
{
vnode_t *nvp;
if (flag != (FREAD | FOFFMAX))
return (EINVAL);
if (nvp = ctfs_latest_nested_open(*vpp, cr)) {
VN_RELE(*vpp);
*vpp = nvp;
return (VOP_OPEN(vpp, flag, cr, ct));
}
return (ESRCH);
}
/*
* ctfs_latest_getattr - the VOP_GETATTR entry point
*
* Fetches and calls VOP_GETATTR on the status file for the LWP's
* latest contract. Otherwise it fakes up something bland.
*/
static int
ctfs_latest_getattr(
vnode_t *vp,
vattr_t *vap,
int flags,
cred_t *cr,
caller_context_t *ct)
{
vnode_t *nvp;
if (nvp = ctfs_latest_nested_open(vp, cr)) {
int res = VOP_GETATTR(nvp, vap, flags, cr, ct);
VN_RELE(nvp);
return (res);
}
vap->va_type = VREG;
vap->va_mode = 0444;
vap->va_nlink = 1;
vap->va_size = 0;
vap->va_ctime.tv_sec = vp->v_vfsp->vfs_mtime;
vap->va_ctime.tv_nsec = 0;
vap->va_atime = vap->va_mtime = vap->va_ctime;
ctfs_common_getattr(vp, vap);
return (0);
}
const fs_operation_def_t ctfs_tops_latest[] = {
{ VOPNAME_OPEN, { .vop_open = ctfs_latest_open } },
{ VOPNAME_CLOSE, { .error = fs_inval } },
{ VOPNAME_IOCTL, { .error = fs_inval } },
{ VOPNAME_GETATTR, { .vop_getattr = ctfs_latest_getattr } },
{ VOPNAME_ACCESS, { .vop_access = ctfs_latest_access } },
{ VOPNAME_READDIR, { .error = fs_notdir } },
{ VOPNAME_LOOKUP, { .error = fs_notdir } },
{ VOPNAME_INACTIVE, { .vop_inactive = gfs_vop_inactive } },
{ NULL, NULL }
};
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