1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate
23*0Sstevel@tonic-gate /*
24*0Sstevel@tonic-gate * Copyright (c) 1992, 1993, 1994, 2000 by Sun Microsystems, Inc.
25*0Sstevel@tonic-gate * All rights reserved.
26*0Sstevel@tonic-gate */
27*0Sstevel@tonic-gate
28*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
29*0Sstevel@tonic-gate
30*0Sstevel@tonic-gate /*
31*0Sstevel@tonic-gate * Caching stat function
32*0Sstevel@tonic-gate */
33*0Sstevel@tonic-gate
34*0Sstevel@tonic-gate #include <meta.h>
35*0Sstevel@tonic-gate
36*0Sstevel@tonic-gate #define MD_NUM_STAT_HEAD 16
37*0Sstevel@tonic-gate
38*0Sstevel@tonic-gate struct statcache {
39*0Sstevel@tonic-gate struct statcache *sc_next;
40*0Sstevel@tonic-gate struct stat sc_stat;
41*0Sstevel@tonic-gate char *sc_filename;
42*0Sstevel@tonic-gate };
43*0Sstevel@tonic-gate
44*0Sstevel@tonic-gate static struct statcache *statcache_head[MD_NUM_STAT_HEAD] =
45*0Sstevel@tonic-gate {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
46*0Sstevel@tonic-gate
47*0Sstevel@tonic-gate int
meta_stat(const char * filename,struct stat * sbp)48*0Sstevel@tonic-gate meta_stat(const char *filename, struct stat *sbp)
49*0Sstevel@tonic-gate {
50*0Sstevel@tonic-gate struct statcache *scp;
51*0Sstevel@tonic-gate int hash;
52*0Sstevel@tonic-gate char *cp;
53*0Sstevel@tonic-gate
54*0Sstevel@tonic-gate hash = 0;
55*0Sstevel@tonic-gate for (cp = (char *)filename; *cp != 0; cp++)
56*0Sstevel@tonic-gate hash += *cp;
57*0Sstevel@tonic-gate
58*0Sstevel@tonic-gate hash &= 0xf;
59*0Sstevel@tonic-gate
60*0Sstevel@tonic-gate for (scp = statcache_head[hash]; scp != NULL; scp = scp->sc_next)
61*0Sstevel@tonic-gate if (strcmp(filename, scp->sc_filename) == 0)
62*0Sstevel@tonic-gate break;
63*0Sstevel@tonic-gate if (scp) {
64*0Sstevel@tonic-gate (void) memcpy((caddr_t)sbp, (caddr_t)&scp->sc_stat,
65*0Sstevel@tonic-gate sizeof (*sbp));
66*0Sstevel@tonic-gate return (0);
67*0Sstevel@tonic-gate }
68*0Sstevel@tonic-gate if (stat(filename, sbp) != 0)
69*0Sstevel@tonic-gate return (-1);
70*0Sstevel@tonic-gate
71*0Sstevel@tonic-gate if (!S_ISBLK(sbp->st_mode) && !S_ISCHR(sbp->st_mode))
72*0Sstevel@tonic-gate return (-1);
73*0Sstevel@tonic-gate
74*0Sstevel@tonic-gate scp = (struct statcache *)malloc(sizeof (*scp));
75*0Sstevel@tonic-gate if (scp != NULL) {
76*0Sstevel@tonic-gate (void) memcpy((caddr_t)&scp->sc_stat, (caddr_t)sbp,
77*0Sstevel@tonic-gate sizeof (*sbp));
78*0Sstevel@tonic-gate scp->sc_filename = strdup(filename);
79*0Sstevel@tonic-gate if (scp->sc_filename == NULL) {
80*0Sstevel@tonic-gate free((char *)scp);
81*0Sstevel@tonic-gate return (0);
82*0Sstevel@tonic-gate }
83*0Sstevel@tonic-gate scp->sc_next = statcache_head[hash];
84*0Sstevel@tonic-gate statcache_head[hash] = scp;
85*0Sstevel@tonic-gate }
86*0Sstevel@tonic-gate return (0);
87*0Sstevel@tonic-gate }
88*0Sstevel@tonic-gate
89*0Sstevel@tonic-gate void
metaflushstatcache(void)90*0Sstevel@tonic-gate metaflushstatcache(void)
91*0Sstevel@tonic-gate {
92*0Sstevel@tonic-gate struct statcache *p, *n;
93*0Sstevel@tonic-gate int i;
94*0Sstevel@tonic-gate
95*0Sstevel@tonic-gate for (i = 0; i < MD_NUM_STAT_HEAD; i++) {
96*0Sstevel@tonic-gate for (p = statcache_head[i], n = NULL; p != NULL; p = n) {
97*0Sstevel@tonic-gate n = p->sc_next;
98*0Sstevel@tonic-gate Free(p->sc_filename);
99*0Sstevel@tonic-gate Free(p);
100*0Sstevel@tonic-gate }
101*0Sstevel@tonic-gate statcache_head[i] = NULL;
102*0Sstevel@tonic-gate }
103*0Sstevel@tonic-gate }
104