fs/ctfs/ctfs_tmpl.c

	ctfs_tmpl.c revision 25e8c5aa2b496d9026e958ac731a610167574f59
/*
 * 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 2007 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>/template vnode.
 */

/*
 * ctfs_create_tmplnode
 *
 * Creates a new template and tdirnode, and returns the tdirnode.
 */
vnode_t *
ctfs_create_tmplnode(vnode_t *pvp)
{
    vnode_t *vp;
    ctfs_tmplnode_t *tmplnode;

    ASSERT(gfs_file_index(pvp) < ct_ntypes);

    vp = gfs_file_create(sizeof (ctfs_tmplnode_t), pvp, ctfs_ops_tmpl);
    tmplnode = vp->v_data;
    tmplnode->ctfs_tmn_tmpl =
        ct_types[gfs_file_index(pvp)]->ct_type_default();

    return (vp);
}

/*
 * ctfs_tmpl_open - VOP_OPEN entry point
 *
 * Just ensures the right mode bits are set.
 */
/* ARGSUSED */
static int
ctfs_tmpl_open(vnode_t **vpp, int flag, cred_t *cr)
{
    if (flag != (FREAD | FWRITE | FOFFMAX))
        return (EINVAL);

    return (0);
}

/*
 * ctfs_tmpl_getattr - VOP_GETATTR entry point
 */
/* ARGSUSED */
static int
ctfs_tmpl_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr)
{
    vap->va_type = VREG;
    vap->va_mode = 0666;
    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);
}

/*
 * ctfs_tmpl_ioctl - VOP_IOCTL entry point
 *
 * All the ct_tmpl_*(3contract) interfaces point here.
 */
/* ARGSUSED */
static int
ctfs_tmpl_ioctl(vnode_t *vp, int cmd, intptr_t arg, int flag, cred_t *cr,
    int *rvalp)
{
    ctfs_tmplnode_t *tmplnode = vp->v_data;
    ct_param_t param;
    ctid_t ctid;
    int error;

    switch (cmd) {
    case CT_TACTIVATE:
        ASSERT(tmplnode->ctfs_tmn_tmpl != NULL);
        ctmpl_activate(tmplnode->ctfs_tmn_tmpl);
        break;
    case CT_TCLEAR:
        ASSERT(tmplnode->ctfs_tmn_tmpl != NULL);
        ctmpl_clear(tmplnode->ctfs_tmn_tmpl);
        break;
    case CT_TCREATE:
        ASSERT(tmplnode->ctfs_tmn_tmpl != NULL);
        error = ctmpl_create(tmplnode->ctfs_tmn_tmpl, &ctid);
        if (error)
            return (error);
        *rvalp = ctid;
        break;
    case CT_TSET:
        if (copyin((void *)arg, &param, sizeof (ct_param_t)))
            return (EFAULT);
        return (ctmpl_set(tmplnode->ctfs_tmn_tmpl, &param, cr));
    case CT_TGET:
        if (copyin((void *)arg, &param, sizeof (ct_param_t)))
            return (EFAULT);
        error = ctmpl_get(tmplnode->ctfs_tmn_tmpl, &param);
        if (error)
            return (error);
        if (copyout(&param, (void *)arg, sizeof (ct_param_t)))
            return (EFAULT);
        break;
    default:
        return (EINVAL);
    }

    return (0);
}

/*
 * ctfs_tmpl_inactive - VOP_INACTIVE entry point
 */
/* ARGSUSED */
static void
ctfs_tmpl_inactive(vnode_t *vp, cred_t *cr)
{
    ctfs_tmplnode_t *tmplnode;

    if ((tmplnode = gfs_file_inactive(vp)) != NULL) {
        ctmpl_free(tmplnode->ctfs_tmn_tmpl);
        kmem_free(tmplnode, sizeof (ctfs_tmplnode_t));
    }
}

const fs_operation_def_t ctfs_tops_tmpl[] = {
    { VOPNAME_OPEN,     { .vop_open = ctfs_tmpl_open } },
    { VOPNAME_CLOSE,    { .vop_close = ctfs_close } },
    { VOPNAME_IOCTL,    { .vop_ioctl = ctfs_tmpl_ioctl } },
    { VOPNAME_GETATTR,  { .vop_getattr = ctfs_tmpl_getattr } },
    { VOPNAME_ACCESS,   { .vop_access = ctfs_access_readwrite } },
    { VOPNAME_READDIR,  { .error = fs_notdir } },
    { VOPNAME_LOOKUP,   { .error = fs_notdir } },
    { VOPNAME_INACTIVE, { .vop_inactive = ctfs_tmpl_inactive } },
    { NULL, NULL }
};