1 /* $NetBSD: flush.c,v 1.13 2007/11/12 16:39:35 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 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 #if !defined(lint) 30 __RCSID("$NetBSD: flush.c,v 1.13 2007/11/12 16:39:35 pooka Exp $"); 31 #endif /* !lint */ 32 33 /* 34 * Flushing / invalidation routines 35 */ 36 37 #include <sys/types.h> 38 39 #include <assert.h> 40 #include <err.h> 41 #include <errno.h> 42 #include <puffs.h> 43 #include <stdio.h> 44 #include <unistd.h> 45 46 #include "puffs_priv.h" 47 48 #if 0 49 int 50 puffs_inval_namecache_node(struct puffs_usermount *pu, void *cookie, 51 const char *name) 52 { 53 54 return EOPNOTSUPP; 55 } 56 #endif 57 58 static int 59 doflush(struct puffs_usermount *pu, void *cookie, int op, 60 off_t start, off_t end) 61 { 62 struct puffs_flush pf; 63 ssize_t n; 64 65 pf.pf_req.preq_pth.pth_framelen = sizeof(struct puffs_flush); 66 pf.pf_req.preq_opclass = PUFFSOP_FLUSH; 67 68 pf.pf_op = op; 69 pf.pf_cookie = cookie; 70 pf.pf_start = start; 71 pf.pf_end = end; 72 73 n = write(pu->pu_fd, &pf, sizeof(struct puffs_flush)); 74 75 /* XXX */ 76 assert(n == sizeof(struct puffs_flush)); 77 return 0; 78 } 79 80 int 81 puffs_inval_namecache_dir(struct puffs_usermount *pu, void *cookie) 82 { 83 84 return doflush(pu, cookie, PUFFS_INVAL_NAMECACHE_DIR, 0, 0); 85 } 86 87 int 88 puffs_inval_namecache_all(struct puffs_usermount *pu) 89 { 90 91 return doflush(pu, NULL, PUFFS_INVAL_NAMECACHE_ALL, 0, 0); 92 } 93 94 int 95 puffs_inval_pagecache_node(struct puffs_usermount *pu, void *cookie) 96 { 97 98 return doflush(pu, cookie, PUFFS_INVAL_PAGECACHE_NODE_RANGE, 0, 0); 99 } 100 101 int 102 puffs_inval_pagecache_node_range(struct puffs_usermount *pu, void *cookie, 103 off_t start, off_t end) 104 { 105 106 return doflush(pu, cookie, PUFFS_INVAL_PAGECACHE_NODE_RANGE, start,end); 107 } 108 109 int 110 puffs_flush_pagecache_node(struct puffs_usermount *pu, void *cookie) 111 { 112 113 return doflush(pu, cookie, PUFFS_FLUSH_PAGECACHE_NODE_RANGE, 0, 0); 114 } 115 116 int 117 puffs_flush_pagecache_node_range(struct puffs_usermount *pu, void *cookie, 118 off_t start, off_t end) 119 { 120 121 return doflush(pu, cookie, PUFFS_FLUSH_PAGECACHE_NODE_RANGE, start,end); 122 } 123