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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 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* This file contains interface definitions and wrappers for file
* system snapshot support. File systems may depend on this module
* for symbol resolution while the implementation may remain unloaded
* until needed.
*/
#include <sys/types.h>
#include <sys/debug.h>
#include <sys/t_lock.h>
#include <sys/param.h>
#include <sys/mman.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/kmem.h>
#include <sys/cmn_err.h>
#include <sys/vnode.h>
#include <sys/debug.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/conf.h>
#include <sys/modctl.h>
#include <sys/fssnap_if.h>
struct fssnap_operations snapops = {
NULL, /* fssnap_create */
NULL, /* fssnap_set_candidate */
NULL, /* fssnap_is_candidate */
NULL, /* fssnap_create_done */
NULL, /* fssnap_delete */
NULL /* fssnap_strategy */
};
void *
fssnap_create(chunknumber_t nchunks, uint_t chunksz, u_offset_t maxsize,
struct vnode *fsvp, int backfilecount, struct vnode **bfvpp, char *backpath,
u_offset_t max_backfile_size)
{
void *snapid = NULL;
if (snapops.fssnap_create)
snapid = (snapops.fssnap_create)(nchunks, chunksz, maxsize,
fsvp, backfilecount, bfvpp, backpath, max_backfile_size);
return (snapid);
}
void
fssnap_set_candidate(void *snapshot_id, chunknumber_t chunknumber)
{
if (snapops.fssnap_set_candidate)
(snapops.fssnap_set_candidate)(snapshot_id, chunknumber);
}
int
fssnap_is_candidate(void *snapshot_id, u_offset_t off)
{
int rc = 0;
if (snapops.fssnap_is_candidate)
rc = (snapops.fssnap_is_candidate)(snapshot_id, off);
return (rc);
}
int
fssnap_create_done(void *snapshot_id)
{
int snapslot = -1;
if (snapops.fssnap_create_done)
snapslot = (snapops.fssnap_create_done)(snapshot_id);
return (snapslot);
}
int
fssnap_delete(void *snapshot_id)
{
int snapslot = -1;
if (snapops.fssnap_delete)
snapslot = (snapops.fssnap_delete)(snapshot_id);
return (snapslot);
}
void
fssnap_strategy(void *snapshot_id, struct buf *bp)
{
if (snapops.fssnap_strategy)
(snapops.fssnap_strategy)(snapshot_id, bp);
}
#include <sys/modctl.h>
extern struct mod_ops mod_miscops;
static struct modlmisc modlmisc = {
&mod_miscops, "File System Snapshot Interface",
};
static struct modlinkage modlinkage = {
MODREV_1, (void *)&modlmisc, NULL
};
int
_init(void)
{
return (mod_install(&modlinkage));
}
/*
* Unloading is MT-safe because our client drivers use
* the _depends_on[] mechanism - we won't go while they're
* still around.
*/
int
_fini(void)
{
return (mod_remove(&modlinkage));
}
int
_info(struct modinfo *modinfop)
{
return (mod_info(&modlinkage, modinfop));
}
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