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flush.c revision 1.7 
      1 /*	$NetBSD: flush.c,v 1.7 2007/04/06 17:49:11 pooka Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2007  Antti Kantee.  All Rights Reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. The name of the company nor the name of the author may be used to
     15  *    endorse or promote products derived from this software without specific
     16  *    prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     19  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     21  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     24  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     28  * SUCH DAMAGE.
     29  */
     30 
     31 #include <sys/cdefs.h>
     32 #if !defined(lint)
     33 __RCSID("$NetBSD: flush.c,v 1.7 2007/04/06 17:49:11 pooka Exp $");
     34 #endif /* !lint */
     35 
     36 /*
     37  * Flushing / invalidation routines
     38  */
     39 
     40 #include <sys/types.h>
     41 
     42 #include <err.h>
     43 #include <errno.h>
     44 #include <puffs.h>
     45 #include <stdio.h>
     46 
     47 #if 0
     48 int
     49 puffs_inval_namecache_node(struct puffs_usermount *pu, void *cookie,
     50 	const char *name)
     51 {
     52 
     53 	return EOPNOTSUPP;
     54 }
     55 #endif
     56 
     57 int
     58 puffs_inval_namecache_dir(struct puffs_usermount *pu, void *cookie)
     59 {
     60 	struct puffs_flush pf;
     61 
     62 	pf.pf_op = PUFFS_INVAL_NAMECACHE_DIR;
     63 	pf.pf_cookie = cookie;
     64 
     65 	return ioctl(pu->pu_fd, PUFFSFLUSHOP, &pf);
     66 }
     67 
     68 int
     69 puffs_inval_namecache_all(struct puffs_usermount *pu)
     70 {
     71 	struct puffs_flush pf;
     72 
     73 	pf.pf_op = PUFFS_INVAL_NAMECACHE_ALL;
     74 	pf.pf_cookie = NULL;
     75 
     76 	return ioctl(pu->pu_fd, PUFFSFLUSHOP, &pf);
     77 }
     78 
     79 int
     80 puffs_inval_pagecache_node(struct puffs_usermount *pu, void *cookie)
     81 {
     82 	struct puffs_flush pf;
     83 
     84 	pf.pf_op = PUFFS_INVAL_PAGECACHE_NODE_RANGE;
     85 	pf.pf_cookie = cookie;
     86 	pf.pf_start = 0;
     87 	pf.pf_end = 0;
     88 
     89 	return ioctl(pu->pu_fd, PUFFSFLUSHOP, &pf);
     90 }
     91 
     92 int
     93 puffs_inval_pagecache_node_range(struct puffs_usermount *pu, void *cookie,
     94 	off_t start, off_t end)
     95 {
     96 	struct puffs_flush pf;
     97 
     98 	pf.pf_op = PUFFS_INVAL_PAGECACHE_NODE_RANGE;
     99 	pf.pf_cookie = cookie;
    100 	pf.pf_start = start;
    101 	pf.pf_end = end;
    102 
    103 	return ioctl(pu->pu_fd, PUFFSFLUSHOP, &pf);
    104 }
    105 
    106 int
    107 puffs_flush_pagecache_node(struct puffs_usermount *pu, void *cookie)
    108 {
    109 	struct puffs_flush pf;
    110 
    111 	pf.pf_op = PUFFS_FLUSH_PAGECACHE_NODE_RANGE;
    112 	pf.pf_cookie = cookie;
    113 	pf.pf_start = 0;
    114 	pf.pf_end = 0;
    115 
    116 	return ioctl(pu->pu_fd, PUFFSFLUSHOP, &pf);
    117 }
    118 
    119 int
    120 puffs_flush_pagecache_node_range(struct puffs_usermount *pu, void *cookie,
    121 	off_t start, off_t end)
    122 {
    123 	struct puffs_flush pf;
    124 
    125 	pf.pf_op = PUFFS_FLUSH_PAGECACHE_NODE_RANGE;
    126 	pf.pf_cookie = cookie;
    127 	pf.pf_start = start;
    128 	pf.pf_end = end;
    129 
    130 	return ioctl(pu->pu_fd, PUFFSFLUSHOP, &pf);
    131 }
    132