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
doflush(struct puffs_usermount * pu,puffs_cookie_t cookie,int op,off_t start,off_t end)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
puffs_inval_namecache_dir(struct puffs_usermount * pu,puffs_cookie_t cookie)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
puffs_inval_namecache_all(struct puffs_usermount * pu)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
puffs_inval_pagecache_node(struct puffs_usermount * pu,puffs_cookie_t cookie)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
puffs_inval_pagecache_node_range(struct puffs_usermount * pu,puffs_cookie_t cookie,off_t start,off_t end)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
puffs_flush_pagecache_node(struct puffs_usermount * pu,puffs_cookie_t cookie)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
puffs_flush_pagecache_node_range(struct puffs_usermount * pu,puffs_cookie_t cookie,off_t start,off_t end)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