1*5c51f124SMoriah Waterland /* 2*5c51f124SMoriah Waterland * CDDL HEADER START 3*5c51f124SMoriah Waterland * 4*5c51f124SMoriah Waterland * The contents of this file are subject to the terms of the 5*5c51f124SMoriah Waterland * Common Development and Distribution License (the "License"). 6*5c51f124SMoriah Waterland * You may not use this file except in compliance with the License. 7*5c51f124SMoriah Waterland * 8*5c51f124SMoriah Waterland * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9*5c51f124SMoriah Waterland * or http://www.opensolaris.org/os/licensing. 10*5c51f124SMoriah Waterland * See the License for the specific language governing permissions 11*5c51f124SMoriah Waterland * and limitations under the License. 12*5c51f124SMoriah Waterland * 13*5c51f124SMoriah Waterland * When distributing Covered Code, include this CDDL HEADER in each 14*5c51f124SMoriah Waterland * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15*5c51f124SMoriah Waterland * If applicable, add the following below this CDDL HEADER, with the 16*5c51f124SMoriah Waterland * fields enclosed by brackets "[]" replaced with your own identifying 17*5c51f124SMoriah Waterland * information: Portions Copyright [yyyy] [name of copyright owner] 18*5c51f124SMoriah Waterland * 19*5c51f124SMoriah Waterland * CDDL HEADER END 20*5c51f124SMoriah Waterland */ 21*5c51f124SMoriah Waterland 22*5c51f124SMoriah Waterland /* 23*5c51f124SMoriah Waterland * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24*5c51f124SMoriah Waterland * Use is subject to license terms. 25*5c51f124SMoriah Waterland */ 26*5c51f124SMoriah Waterland 27*5c51f124SMoriah Waterland /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28*5c51f124SMoriah Waterland /* All Rights Reserved */ 29*5c51f124SMoriah Waterland 30*5c51f124SMoriah Waterland 31*5c51f124SMoriah Waterland #include <sys/types.h> 32*5c51f124SMoriah Waterland #include <sys/param.h> 33*5c51f124SMoriah Waterland #include <sys/sysmacros.h> 34*5c51f124SMoriah Waterland 35*5c51f124SMoriah Waterland /* 36*5c51f124SMoriah Waterland * This should not be a constant, but for ufs it is 12, not 10 like for s5. 37*5c51f124SMoriah Waterland */ 38*5c51f124SMoriah Waterland #define DIRECT 12 /* Number of logical blocks before indirection */ 39*5c51f124SMoriah Waterland 40*5c51f124SMoriah Waterland fsblkcnt_t 41*5c51f124SMoriah Waterland nblk(fsblkcnt_t size, ulong_t bsize, ulong_t frsize) 42*5c51f124SMoriah Waterland { 43*5c51f124SMoriah Waterland fsblkcnt_t tot, count, count1, d_indirect, t_indirect, ind; 44*5c51f124SMoriah Waterland fsblkcnt_t frags = 0; 45*5c51f124SMoriah Waterland 46*5c51f124SMoriah Waterland if (size == 0 || bsize == 0) 47*5c51f124SMoriah Waterland return (1); 48*5c51f124SMoriah Waterland 49*5c51f124SMoriah Waterland /* 50*5c51f124SMoriah Waterland * Need to keep track of indirect blocks. 51*5c51f124SMoriah Waterland */ 52*5c51f124SMoriah Waterland 53*5c51f124SMoriah Waterland ind = howmany(bsize, sizeof (daddr_t)); 54*5c51f124SMoriah Waterland d_indirect = ind + DIRECT; /* double indirection */ 55*5c51f124SMoriah Waterland t_indirect = ind * (ind + 1) + DIRECT; /* triple indirection */ 56*5c51f124SMoriah Waterland 57*5c51f124SMoriah Waterland tot = howmany(size, bsize); 58*5c51f124SMoriah Waterland 59*5c51f124SMoriah Waterland if (tot > t_indirect) { 60*5c51f124SMoriah Waterland count1 = (tot - ind * ind - (DIRECT + 1)) / ind; 61*5c51f124SMoriah Waterland count = count1 + count1 / ind + ind + 3; 62*5c51f124SMoriah Waterland } else if (tot > d_indirect) { 63*5c51f124SMoriah Waterland count = (tot - (DIRECT + 1)) / ind + 2; 64*5c51f124SMoriah Waterland } else if (tot > DIRECT) { 65*5c51f124SMoriah Waterland count = 1; 66*5c51f124SMoriah Waterland } else { 67*5c51f124SMoriah Waterland count = 0; 68*5c51f124SMoriah Waterland frags = (frsize > 0) ? 69*5c51f124SMoriah Waterland roundup(size, frsize) : 70*5c51f124SMoriah Waterland roundup(size, bsize); 71*5c51f124SMoriah Waterland } 72*5c51f124SMoriah Waterland 73*5c51f124SMoriah Waterland /* Accounting for the indirect blocks, the total becomes */ 74*5c51f124SMoriah Waterland tot += count; 75*5c51f124SMoriah Waterland 76*5c51f124SMoriah Waterland /* 77*5c51f124SMoriah Waterland * calculate number of 512 byte blocks, for frag or full block cases. 78*5c51f124SMoriah Waterland */ 79*5c51f124SMoriah Waterland if (!frags) 80*5c51f124SMoriah Waterland tot *= howmany(bsize, DEV_BSIZE); 81*5c51f124SMoriah Waterland else 82*5c51f124SMoriah Waterland tot = howmany(frags, DEV_BSIZE); 83*5c51f124SMoriah Waterland return (tot); 84*5c51f124SMoriah Waterland } 85