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 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 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