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 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #include <stdio.h> 30*0Sstevel@tonic-gate #include <unistd.h> 31*0Sstevel@tonic-gate #include <stdlib.h> 32*0Sstevel@tonic-gate #include <sys/types.h> 33*0Sstevel@tonic-gate #include <alloca.h> 34*0Sstevel@tonic-gate #include <sys/stat.h> 35*0Sstevel@tonic-gate #include <malloc.h> 36*0Sstevel@tonic-gate #include <fcntl.h> 37*0Sstevel@tonic-gate #include <syslog.h> 38*0Sstevel@tonic-gate #include <mdesc.h> 39*0Sstevel@tonic-gate #include <string.h> 40*0Sstevel@tonic-gate #include <errno.h> 41*0Sstevel@tonic-gate 42*0Sstevel@tonic-gate #define MDESC_PATH "/devices/pseudo/mdesc@0:mdesc" 43*0Sstevel@tonic-gate #define SIZE 8192 44*0Sstevel@tonic-gate 45*0Sstevel@tonic-gate md_t * 46*0Sstevel@tonic-gate mdesc_devinit(void) 47*0Sstevel@tonic-gate { 48*0Sstevel@tonic-gate int fh; 49*0Sstevel@tonic-gate uint8_t *bufp = NULL; 50*0Sstevel@tonic-gate int res; 51*0Sstevel@tonic-gate int size; 52*0Sstevel@tonic-gate int offset; 53*0Sstevel@tonic-gate md_t *mdp; 54*0Sstevel@tonic-gate 55*0Sstevel@tonic-gate fh = open(MDESC_PATH, O_RDONLY, 0); 56*0Sstevel@tonic-gate if (fh < 0) { 57*0Sstevel@tonic-gate return (NULL); 58*0Sstevel@tonic-gate } 59*0Sstevel@tonic-gate 60*0Sstevel@tonic-gate size = SIZE; /* initial size */ 61*0Sstevel@tonic-gate offset = 0; 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate bufp = malloc(size); 64*0Sstevel@tonic-gate if (NULL == bufp) { 65*0Sstevel@tonic-gate return (NULL); 66*0Sstevel@tonic-gate } 67*0Sstevel@tonic-gate 68*0Sstevel@tonic-gate /* OK read until we get a EOF */ 69*0Sstevel@tonic-gate 70*0Sstevel@tonic-gate do { 71*0Sstevel@tonic-gate int len; 72*0Sstevel@tonic-gate 73*0Sstevel@tonic-gate len = size - offset; 74*0Sstevel@tonic-gate 75*0Sstevel@tonic-gate while (len < SIZE) { 76*0Sstevel@tonic-gate size += SIZE; 77*0Sstevel@tonic-gate bufp = realloc(bufp, size); 78*0Sstevel@tonic-gate if (NULL == bufp) 79*0Sstevel@tonic-gate return (NULL); 80*0Sstevel@tonic-gate len = size - offset; 81*0Sstevel@tonic-gate } 82*0Sstevel@tonic-gate 83*0Sstevel@tonic-gate do { 84*0Sstevel@tonic-gate res = read(fh, bufp+offset, len); 85*0Sstevel@tonic-gate } while ((res < 0) && (errno == EAGAIN)); 86*0Sstevel@tonic-gate 87*0Sstevel@tonic-gate if (res < 0) { 88*0Sstevel@tonic-gate free(bufp); 89*0Sstevel@tonic-gate return (NULL); 90*0Sstevel@tonic-gate } 91*0Sstevel@tonic-gate 92*0Sstevel@tonic-gate offset += res; 93*0Sstevel@tonic-gate } while (res > 0); 94*0Sstevel@tonic-gate 95*0Sstevel@tonic-gate (void) close(fh); 96*0Sstevel@tonic-gate 97*0Sstevel@tonic-gate bufp = realloc(bufp, offset); 98*0Sstevel@tonic-gate if (NULL == bufp) 99*0Sstevel@tonic-gate return (NULL); 100*0Sstevel@tonic-gate 101*0Sstevel@tonic-gate mdp = md_init_intern((uint64_t *)bufp, malloc, free); 102*0Sstevel@tonic-gate if (NULL == mdp) { 103*0Sstevel@tonic-gate free(bufp); 104*0Sstevel@tonic-gate return (NULL); 105*0Sstevel@tonic-gate } 106*0Sstevel@tonic-gate 107*0Sstevel@tonic-gate return (mdp); 108*0Sstevel@tonic-gate } 109