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 1992-1994, 2000-2002 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 30*0Sstevel@tonic-gate /* 31*0Sstevel@tonic-gate * miscellaneous utilities 32*0Sstevel@tonic-gate */ 33*0Sstevel@tonic-gate 34*0Sstevel@tonic-gate #include <meta.h> 35*0Sstevel@tonic-gate 36*0Sstevel@tonic-gate static int meta_fd = -1; 37*0Sstevel@tonic-gate static major_t meta_major; 38*0Sstevel@tonic-gate 39*0Sstevel@tonic-gate /* 40*0Sstevel@tonic-gate * open administrative device 41*0Sstevel@tonic-gate */ 42*0Sstevel@tonic-gate int 43*0Sstevel@tonic-gate open_admin( 44*0Sstevel@tonic-gate md_error_t *ep 45*0Sstevel@tonic-gate ) 46*0Sstevel@tonic-gate { 47*0Sstevel@tonic-gate struct stat buf; 48*0Sstevel@tonic-gate 49*0Sstevel@tonic-gate /* if not already open */ 50*0Sstevel@tonic-gate if (meta_fd < 0) { 51*0Sstevel@tonic-gate ulong_t dversion = 0; 52*0Sstevel@tonic-gate 53*0Sstevel@tonic-gate /* try read/write fall back to readonly */ 54*0Sstevel@tonic-gate if ((meta_fd = open(ADMSPECIAL, O_RDWR, 0)) < 0) { 55*0Sstevel@tonic-gate if (errno != EACCES) 56*0Sstevel@tonic-gate return (mdsyserror(ep, errno, ADMSPECIAL)); 57*0Sstevel@tonic-gate if ((meta_fd = open(ADMSPECIAL, O_RDONLY, 0)) < 0) 58*0Sstevel@tonic-gate return (mdsyserror(ep, errno, ADMSPECIAL)); 59*0Sstevel@tonic-gate } 60*0Sstevel@tonic-gate 61*0Sstevel@tonic-gate /* get major */ 62*0Sstevel@tonic-gate if (fstat(meta_fd, &buf) != 0) 63*0Sstevel@tonic-gate return (mdsyserror(ep, errno, ADMSPECIAL)); 64*0Sstevel@tonic-gate meta_major = major(buf.st_rdev); 65*0Sstevel@tonic-gate 66*0Sstevel@tonic-gate /* check driver version */ 67*0Sstevel@tonic-gate if (metaioctl(MD_IOCGVERSION, &dversion, ep, NULL) != 0) 68*0Sstevel@tonic-gate return (-1); 69*0Sstevel@tonic-gate if (dversion != MD_DVERSION) 70*0Sstevel@tonic-gate return (mderror(ep, MDE_DVERSION, NULL)); 71*0Sstevel@tonic-gate } 72*0Sstevel@tonic-gate 73*0Sstevel@tonic-gate /* return fd */ 74*0Sstevel@tonic-gate return (meta_fd); 75*0Sstevel@tonic-gate } 76*0Sstevel@tonic-gate 77*0Sstevel@tonic-gate int 78*0Sstevel@tonic-gate close_admin( 79*0Sstevel@tonic-gate md_error_t *ep 80*0Sstevel@tonic-gate ) 81*0Sstevel@tonic-gate { 82*0Sstevel@tonic-gate if (meta_fd >= 0) { 83*0Sstevel@tonic-gate if (close(meta_fd) == -1) 84*0Sstevel@tonic-gate return (mdsyserror(ep, errno, ADMSPECIAL)); 85*0Sstevel@tonic-gate meta_fd = -1; 86*0Sstevel@tonic-gate } 87*0Sstevel@tonic-gate 88*0Sstevel@tonic-gate return (0); 89*0Sstevel@tonic-gate } 90*0Sstevel@tonic-gate 91*0Sstevel@tonic-gate /* 92*0Sstevel@tonic-gate * Returns True if the md_dev64_t passed in is a metadevice. 93*0Sstevel@tonic-gate * Else it returns False. 94*0Sstevel@tonic-gate */ 95*0Sstevel@tonic-gate int 96*0Sstevel@tonic-gate meta_dev_ismeta( 97*0Sstevel@tonic-gate md_dev64_t dev 98*0Sstevel@tonic-gate ) 99*0Sstevel@tonic-gate { 100*0Sstevel@tonic-gate int fd; 101*0Sstevel@tonic-gate md_error_t status = mdnullerror; 102*0Sstevel@tonic-gate 103*0Sstevel@tonic-gate fd = open_admin(&status); 104*0Sstevel@tonic-gate assert(fd >= 0); 105*0Sstevel@tonic-gate return (meta_getmajor(dev) == meta_major); 106*0Sstevel@tonic-gate } 107*0Sstevel@tonic-gate 108*0Sstevel@tonic-gate 109*0Sstevel@tonic-gate int 110*0Sstevel@tonic-gate meta_get_nunits(md_error_t *ep) 111*0Sstevel@tonic-gate { 112*0Sstevel@tonic-gate 113*0Sstevel@tonic-gate static set_t max_nunits = 0; 114*0Sstevel@tonic-gate 115*0Sstevel@tonic-gate if (max_nunits == 0) 116*0Sstevel@tonic-gate if (metaioctl(MD_IOCGETNUNITS, &max_nunits, ep, NULL) != 0) 117*0Sstevel@tonic-gate return (-1); 118*0Sstevel@tonic-gate 119*0Sstevel@tonic-gate return (max_nunits); 120*0Sstevel@tonic-gate } 121*0Sstevel@tonic-gate 122*0Sstevel@tonic-gate md_dev64_t 123*0Sstevel@tonic-gate metamakedev(minor_t mnum) 124*0Sstevel@tonic-gate { 125*0Sstevel@tonic-gate int fd; 126*0Sstevel@tonic-gate md_error_t status = mdnullerror; 127*0Sstevel@tonic-gate 128*0Sstevel@tonic-gate fd = open_admin(&status); 129*0Sstevel@tonic-gate 130*0Sstevel@tonic-gate assert(fd >= 0); 131*0Sstevel@tonic-gate 132*0Sstevel@tonic-gate return (((md_dev64_t)meta_major << NBITSMINOR64) | mnum); 133*0Sstevel@tonic-gate } 134