/* $NetBSD: flush.c,v 1.16 2008/08/12 19:44:39 pooka Exp $ */
/*
* Copyright (c) 2007 Antti Kantee. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if !defined(lint)
__RCSID("$NetBSD: flush.c,v 1.16 2008/08/12 19:44:39 pooka Exp $");
#endif /* !lint */
/*
* Flushing / invalidation routines
*/
#include <sys/types.h>
#include <assert.h>
#include <err.h>
#include <errno.h>
#include <puffs.h>
#include <stdio.h>
#include <unistd.h>
#include "puffs_priv.h"
#if 0
int
puffs_inval_namecache_node(struct puffs_usermount *pu, puffs_cookie_t cookie,
const char *name)
{
return EOPNOTSUPP;
}
#endif
static int
doflush(struct puffs_usermount *pu, puffs_cookie_t cookie, int op,
off_t start, off_t end)
{
struct puffs_framebuf *pb;
struct puffs_flush *pf;
size_t winlen;
int rv;
pb = puffs_framebuf_make();
if (pb == NULL)
return ENOMEM;
winlen = sizeof(struct puffs_flush);
if ((rv = puffs_framebuf_getwindow(pb, 0, (void *)&pf, &winlen)) == -1)
goto out;
assert(winlen == sizeof(struct puffs_flush));
pf->pf_req.preq_buflen = sizeof(struct puffs_flush);
pf->pf_req.preq_opclass = PUFFSOP_FLUSH;
pf->pf_req.preq_id = puffs__nextreq(pu);
pf->pf_op = op;
pf->pf_cookie = cookie;
pf->pf_start = start;
pf->pf_end = end;
rv = puffs_framev_enqueue_cc(puffs_cc_getcc(pu),
puffs_getselectable(pu), pb, 0);
out:
puffs_framebuf_destroy(pb);
return rv;
}
int
puffs_inval_namecache_dir(struct puffs_usermount *pu, puffs_cookie_t cookie)
{
return doflush(pu, cookie, PUFFS_INVAL_NAMECACHE_DIR, 0, 0);
}
int
puffs_inval_namecache_all(struct puffs_usermount *pu)
{
return doflush(pu, NULL, PUFFS_INVAL_NAMECACHE_ALL, 0, 0);
}
int
puffs_inval_pagecache_node(struct puffs_usermount *pu, puffs_cookie_t cookie)
{
return doflush(pu, cookie, PUFFS_INVAL_PAGECACHE_NODE_RANGE, 0, 0);
}
int
puffs_inval_pagecache_node_range(struct puffs_usermount *pu,
puffs_cookie_t cookie, off_t start, off_t end)
{
return doflush(pu, cookie, PUFFS_INVAL_PAGECACHE_NODE_RANGE, start,end);
}
int
puffs_flush_pagecache_node(struct puffs_usermount *pu, puffs_cookie_t cookie)
{
return doflush(pu, cookie, PUFFS_FLUSH_PAGECACHE_NODE_RANGE, 0, 0);
}
int
puffs_flush_pagecache_node_range(struct puffs_usermount *pu,
puffs_cookie_t cookie, off_t start, off_t end)
{
return doflush(pu, cookie, PUFFS_FLUSH_PAGECACHE_NODE_RANGE, start,end);
}
