18ede7795Sdenny /* 28ede7795Sdenny * This file is substantially derived from src/sys/ufs/ext2fs/ext2fs_vfsops.c:e2fs_statfs(). 38ede7795Sdenny * That file's copyright is applied here. 48ede7795Sdenny */ 58ede7795Sdenny 68ede7795Sdenny /* Modified for EXT2FS on NetBSD by Manuel Bouyer, April 1997 */ 78ede7795Sdenny 88ede7795Sdenny /* 98ede7795Sdenny * Copyright (c) 1989, 1991, 1993, 1994 108ede7795Sdenny * The Regents of the University of California. All rights reserved. 118ede7795Sdenny * 128ede7795Sdenny * Redistribution and use in source and binary forms, with or without 138ede7795Sdenny * modification, are permitted provided that the following conditions 148ede7795Sdenny * are met: 158ede7795Sdenny * 1. Redistributions of source code must retain the above copyright 168ede7795Sdenny * notice, this list of conditions and the following disclaimer. 178ede7795Sdenny * 2. Redistributions in binary form must reproduce the above copyright 188ede7795Sdenny * notice, this list of conditions and the following disclaimer in the 198ede7795Sdenny * documentation and/or other materials provided with the distribution. 208ede7795Sdenny * 3. All advertising materials mentioning features or use of this software 218ede7795Sdenny * must display the following acknowledgement: 228ede7795Sdenny * This product includes software developed by the University of 238ede7795Sdenny * California, Berkeley and its contributors. 248ede7795Sdenny * 4. Neither the name of the University nor the names of its contributors 258ede7795Sdenny * may be used to endorse or promote products derived from this software 268ede7795Sdenny * without specific prior written permission. 278ede7795Sdenny * 288ede7795Sdenny * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 298ede7795Sdenny * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 308ede7795Sdenny * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 318ede7795Sdenny * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 328ede7795Sdenny * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 338ede7795Sdenny * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 348ede7795Sdenny * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 358ede7795Sdenny * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 368ede7795Sdenny * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 378ede7795Sdenny * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 388ede7795Sdenny * SUCH DAMAGE. 398ede7795Sdenny * 408ede7795Sdenny * @(#)ffs_vfsops.c 8.14 (Berkeley) 11/28/94 418ede7795Sdenny */ 428ede7795Sdenny 438ede7795Sdenny #include <sys/param.h> 448ede7795Sdenny #include <sys/mount.h> 458ede7795Sdenny #include <ufs/ext2fs/ext2fs.h> 468ede7795Sdenny #include <ufs/ext2fs/ext2fs_dinode.h> 47fe6baaf7Sderaadt #include <unistd.h> 48fe6baaf7Sderaadt #include <stdlib.h> 49fe6baaf7Sderaadt #include <string.h> 50fe6baaf7Sderaadt #include <fcntl.h> 51fe6baaf7Sderaadt #include <fstab.h> 528ede7795Sdenny 538ede7795Sdenny int e2fs_df __P((int, char *, struct statfs *)); 548ede7795Sdenny 558ede7795Sdenny extern int bread __P((int, off_t, void *, int)); 568ede7795Sdenny extern char *getmntpt __P((char *)); 578ede7795Sdenny 588ede7795Sdenny union { 598ede7795Sdenny struct ext2fs ie_fs; 608ede7795Sdenny char dummy[SBSIZE]; 618ede7795Sdenny } sb; 628ede7795Sdenny #define sblock sb.ie_fs 638ede7795Sdenny 648ede7795Sdenny int 658ede7795Sdenny e2fs_df(rfd, file, sfsp) 668ede7795Sdenny int rfd; 678ede7795Sdenny char *file; 688ede7795Sdenny struct statfs *sfsp; 698ede7795Sdenny { 708ede7795Sdenny char *mntpt; 718ede7795Sdenny u_int32_t overhead, overhead_per_group; 728ede7795Sdenny int32_t ncg, ngdb, ipb, itpg; 738ede7795Sdenny 748ede7795Sdenny if (bread(rfd, (off_t)SBOFF, &sblock, SBSIZE) == 0) { 758ede7795Sdenny return (-1); 768ede7795Sdenny } 778ede7795Sdenny if ((sblock.e2fs_magic != E2FS_MAGIC) || 78*65348f21Sjasoni (sblock.e2fs_rev != E2FS_REV0 && sblock.e2fs_rev != E2FS_REV1)) { 798ede7795Sdenny return (-1); 808ede7795Sdenny } 818ede7795Sdenny sfsp->f_flags = 0; /* The fs is not mapped, so no flags */ 828ede7795Sdenny sfsp->f_bsize = 1024 << sblock.e2fs_log_bsize; 838ede7795Sdenny sfsp->f_iosize = 1024 << sblock.e2fs_log_bsize; 848ede7795Sdenny 858ede7795Sdenny ipb = sfsp->f_bsize / sizeof(struct ext2fs_dinode); 868ede7795Sdenny itpg = sblock.e2fs_ipg/ipb; 878ede7795Sdenny 888ede7795Sdenny ncg = howmany(sblock.e2fs_bcount - sblock.e2fs_first_dblock, 898ede7795Sdenny sblock.e2fs_bpg); 908ede7795Sdenny ngdb = howmany(ncg, sfsp->f_bsize / sizeof(struct ext2_gd)); 918ede7795Sdenny overhead_per_group = 1 /* super block */ + 928ede7795Sdenny ngdb + 938ede7795Sdenny 1 /* block bitmap */ + 948ede7795Sdenny 1 /* inode bitmap */ + 958ede7795Sdenny itpg; 968ede7795Sdenny overhead = sblock.e2fs_first_dblock + ncg * overhead_per_group; 978ede7795Sdenny 988ede7795Sdenny sfsp->f_blocks = sblock.e2fs_bcount - overhead; 998ede7795Sdenny sfsp->f_bfree = sblock.e2fs_fbcount; 1008ede7795Sdenny sfsp->f_bavail = sfsp->f_bfree - sblock.e2fs_rbcount; 1018ede7795Sdenny sfsp->f_files = sblock.e2fs_icount; 1028ede7795Sdenny sfsp->f_ffree = sblock.e2fs_ficount; 1038ede7795Sdenny sfsp->f_fsid.val[0] = 0; 1048ede7795Sdenny sfsp->f_fsid.val[1] = 0; 1058ede7795Sdenny if ((mntpt = getmntpt(file)) == 0) 1068ede7795Sdenny mntpt = ""; 1078ede7795Sdenny memmove(&sfsp->f_mntonname[0], mntpt, MNAMELEN); 1088ede7795Sdenny memmove(&sfsp->f_mntfromname[0], file, MNAMELEN); 1098ede7795Sdenny strncpy(sfsp->f_fstypename, MOUNT_EXT2FS, MFSNAMELEN-1); 1108ede7795Sdenny sfsp->f_fstypename[MFSNAMELEN-1] = '\0'; 1118ede7795Sdenny return (0); 1128ede7795Sdenny } 113