1 /* $NetBSD: flush.c,v 1.16 2008/08/12 19:44:39 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 1.16 2008/08/12 19:44:39 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, puffs_cookie_t cookie, 51 const char *name) 52 { 53 54 return EOPNOTSUPP; 55 } 56 #endif 57 58 static int 59 doflush(struct puffs_usermount *pu, puffs_cookie_t cookie, int op, 60 off_t start, off_t end) 61 { 62 struct puffs_framebuf *pb; 63 struct puffs_flush *pf; 64 size_t winlen; 65 int rv; 66 67 pb = puffs_framebuf_make(); 68 if (pb == NULL) 69 return ENOMEM; 70 71 winlen = sizeof(struct puffs_flush); 72 if ((rv = puffs_framebuf_getwindow(pb, 0, (void *)&pf, &winlen)) == -1) 73 goto out; 74 assert(winlen == sizeof(struct puffs_flush)); 75 76 pf->pf_req.preq_buflen = sizeof(struct puffs_flush); 77 pf->pf_req.preq_opclass = PUFFSOP_FLUSH; 78 pf->pf_req.preq_id = puffs__nextreq(pu); 79 80 pf->pf_op = op; 81 pf->pf_cookie = cookie; 82 pf->pf_start = start; 83 pf->pf_end = end; 84 85 rv = puffs_framev_enqueue_cc(puffs_cc_getcc(pu), 86 puffs_getselectable(pu), pb, 0); 87 88 out: 89 puffs_framebuf_destroy(pb); 90 return rv; 91 } 92 93 int 94 puffs_inval_namecache_dir(struct puffs_usermount *pu, puffs_cookie_t cookie) 95 { 96 97 return doflush(pu, cookie, PUFFS_INVAL_NAMECACHE_DIR, 0, 0); 98 } 99 100 int 101 puffs_inval_namecache_all(struct puffs_usermount *pu) 102 { 103 104 return doflush(pu, NULL, PUFFS_INVAL_NAMECACHE_ALL, 0, 0); 105 } 106 107 int 108 puffs_inval_pagecache_node(struct puffs_usermount *pu, puffs_cookie_t cookie) 109 { 110 111 return doflush(pu, cookie, PUFFS_INVAL_PAGECACHE_NODE_RANGE, 0, 0); 112 } 113 114 int 115 puffs_inval_pagecache_node_range(struct puffs_usermount *pu, 116 puffs_cookie_t cookie, off_t start, off_t end) 117 { 118 119 return doflush(pu, cookie, PUFFS_INVAL_PAGECACHE_NODE_RANGE, start,end); 120 } 121 122 int 123 puffs_flush_pagecache_node(struct puffs_usermount *pu, puffs_cookie_t cookie) 124 { 125 126 return doflush(pu, cookie, PUFFS_FLUSH_PAGECACHE_NODE_RANGE, 0, 0); 127 } 128 129 int 130 puffs_flush_pagecache_node_range(struct puffs_usermount *pu, 131 puffs_cookie_t cookie, off_t start, off_t end) 132 { 133 134 return doflush(pu, cookie, PUFFS_FLUSH_PAGECACHE_NODE_RANGE, start,end); 135 } 136