1*8ede7795Sdenny /* 2*8ede7795Sdenny * This file is substantially derived from src/sys/ufs/ext2fs/ext2fs_vfsops.c:e2fs_statfs(). 3*8ede7795Sdenny * That file's copyright is applied here. 4*8ede7795Sdenny */ 5*8ede7795Sdenny 6*8ede7795Sdenny /* Modified for EXT2FS on NetBSD by Manuel Bouyer, April 1997 */ 7*8ede7795Sdenny 8*8ede7795Sdenny /* 9*8ede7795Sdenny * Copyright (c) 1989, 1991, 1993, 1994 10*8ede7795Sdenny * The Regents of the University of California. All rights reserved. 11*8ede7795Sdenny * 12*8ede7795Sdenny * Redistribution and use in source and binary forms, with or without 13*8ede7795Sdenny * modification, are permitted provided that the following conditions 14*8ede7795Sdenny * are met: 15*8ede7795Sdenny * 1. Redistributions of source code must retain the above copyright 16*8ede7795Sdenny * notice, this list of conditions and the following disclaimer. 17*8ede7795Sdenny * 2. Redistributions in binary form must reproduce the above copyright 18*8ede7795Sdenny * notice, this list of conditions and the following disclaimer in the 19*8ede7795Sdenny * documentation and/or other materials provided with the distribution. 20*8ede7795Sdenny * 3. All advertising materials mentioning features or use of this software 21*8ede7795Sdenny * must display the following acknowledgement: 22*8ede7795Sdenny * This product includes software developed by the University of 23*8ede7795Sdenny * California, Berkeley and its contributors. 24*8ede7795Sdenny * 4. Neither the name of the University nor the names of its contributors 25*8ede7795Sdenny * may be used to endorse or promote products derived from this software 26*8ede7795Sdenny * without specific prior written permission. 27*8ede7795Sdenny * 28*8ede7795Sdenny * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29*8ede7795Sdenny * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30*8ede7795Sdenny * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31*8ede7795Sdenny * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32*8ede7795Sdenny * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33*8ede7795Sdenny * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34*8ede7795Sdenny * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35*8ede7795Sdenny * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36*8ede7795Sdenny * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37*8ede7795Sdenny * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38*8ede7795Sdenny * SUCH DAMAGE. 39*8ede7795Sdenny * 40*8ede7795Sdenny * @(#)ffs_vfsops.c 8.14 (Berkeley) 11/28/94 41*8ede7795Sdenny */ 42*8ede7795Sdenny 43*8ede7795Sdenny #include <unistd.h> 44*8ede7795Sdenny #include <fcntl.h> 45*8ede7795Sdenny #include <sys/param.h> 46*8ede7795Sdenny #include <sys/mount.h> 47*8ede7795Sdenny #include <fstab.h> 48*8ede7795Sdenny #include <ufs/ext2fs/ext2fs.h> 49*8ede7795Sdenny #include <ufs/ext2fs/ext2fs_dinode.h> 50*8ede7795Sdenny 51*8ede7795Sdenny int e2fs_df __P((int, char *, struct statfs *)); 52*8ede7795Sdenny 53*8ede7795Sdenny extern int bread __P((int, off_t, void *, int)); 54*8ede7795Sdenny extern char *getmntpt __P((char *)); 55*8ede7795Sdenny 56*8ede7795Sdenny union { 57*8ede7795Sdenny struct ext2fs ie_fs; 58*8ede7795Sdenny char dummy[SBSIZE]; 59*8ede7795Sdenny } sb; 60*8ede7795Sdenny #define sblock sb.ie_fs 61*8ede7795Sdenny 62*8ede7795Sdenny int 63*8ede7795Sdenny e2fs_df(rfd, file, sfsp) 64*8ede7795Sdenny int rfd; 65*8ede7795Sdenny char *file; 66*8ede7795Sdenny struct statfs *sfsp; 67*8ede7795Sdenny { 68*8ede7795Sdenny char *mntpt; 69*8ede7795Sdenny u_int32_t overhead, overhead_per_group; 70*8ede7795Sdenny int32_t ncg, ngdb, ipb, itpg; 71*8ede7795Sdenny 72*8ede7795Sdenny if (bread(rfd, (off_t)SBOFF, &sblock, SBSIZE) == 0) { 73*8ede7795Sdenny return (-1); 74*8ede7795Sdenny } 75*8ede7795Sdenny if ((sblock.e2fs_magic != E2FS_MAGIC) || 76*8ede7795Sdenny (sblock.e2fs_rev != E2FS_REV)) { 77*8ede7795Sdenny return (-1); 78*8ede7795Sdenny } 79*8ede7795Sdenny sfsp->f_type = 0; /* Unused field, set to 0 */ 80*8ede7795Sdenny sfsp->f_flags = 0; /* The fs is not mapped, so no flags */ 81*8ede7795Sdenny sfsp->f_bsize = 1024 << sblock.e2fs_log_bsize; 82*8ede7795Sdenny sfsp->f_iosize = 1024 << sblock.e2fs_log_bsize; 83*8ede7795Sdenny 84*8ede7795Sdenny ipb = sfsp->f_bsize / sizeof(struct ext2fs_dinode); 85*8ede7795Sdenny itpg = sblock.e2fs_ipg/ipb; 86*8ede7795Sdenny 87*8ede7795Sdenny ncg = howmany(sblock.e2fs_bcount - sblock.e2fs_first_dblock, 88*8ede7795Sdenny sblock.e2fs_bpg); 89*8ede7795Sdenny ngdb = howmany(ncg, sfsp->f_bsize / sizeof(struct ext2_gd)); 90*8ede7795Sdenny overhead_per_group = 1 /* super block */ + 91*8ede7795Sdenny ngdb + 92*8ede7795Sdenny 1 /* block bitmap */ + 93*8ede7795Sdenny 1 /* inode bitmap */ + 94*8ede7795Sdenny itpg; 95*8ede7795Sdenny overhead = sblock.e2fs_first_dblock + ncg * overhead_per_group; 96*8ede7795Sdenny 97*8ede7795Sdenny sfsp->f_blocks = sblock.e2fs_bcount - overhead; 98*8ede7795Sdenny sfsp->f_bfree = sblock.e2fs_fbcount; 99*8ede7795Sdenny sfsp->f_bavail = sfsp->f_bfree - sblock.e2fs_rbcount; 100*8ede7795Sdenny sfsp->f_files = sblock.e2fs_icount; 101*8ede7795Sdenny sfsp->f_ffree = sblock.e2fs_ficount; 102*8ede7795Sdenny sfsp->f_fsid.val[0] = 0; 103*8ede7795Sdenny sfsp->f_fsid.val[1] = 0; 104*8ede7795Sdenny if ((mntpt = getmntpt(file)) == 0) 105*8ede7795Sdenny mntpt = ""; 106*8ede7795Sdenny memmove(&sfsp->f_mntonname[0], mntpt, MNAMELEN); 107*8ede7795Sdenny memmove(&sfsp->f_mntfromname[0], file, MNAMELEN); 108*8ede7795Sdenny strncpy(sfsp->f_fstypename, MOUNT_EXT2FS, MFSNAMELEN-1); 109*8ede7795Sdenny sfsp->f_fstypename[MFSNAMELEN-1] = '\0'; 110*8ede7795Sdenny return (0); 111*8ede7795Sdenny } 112