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