ext2fs_bswap.c revision 1.10
1 /* $NetBSD: ext2fs_bswap.c,v 1.10 2005/10/30 23:34:04 simonb Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Manuel Bouyer. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Manuel Bouyer. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: ext2fs_bswap.c,v 1.10 2005/10/30 23:34:04 simonb Exp $"); 35 36 #include <sys/types.h> 37 #include <ufs/ext2fs/ext2fs.h> 38 #include <ufs/ext2fs/ext2fs_dinode.h> 39 40 #if defined(_KERNEL) 41 #include <sys/systm.h> 42 #else 43 #include <string.h> 44 #endif 45 46 /* These functions are only needed if native byte order is not big endian */ 47 #if BYTE_ORDER == BIG_ENDIAN 48 void 49 e2fs_sb_bswap(struct ext2fs *old, struct ext2fs *new) 50 { 51 /* preserve unused fields */ 52 memcpy(new, old, sizeof(struct ext2fs)); 53 new->e2fs_icount = bswap32(old->e2fs_icount); 54 new->e2fs_bcount = bswap32(old->e2fs_bcount); 55 new->e2fs_rbcount = bswap32(old->e2fs_rbcount); 56 new->e2fs_fbcount = bswap32(old->e2fs_fbcount); 57 new->e2fs_ficount = bswap32(old->e2fs_ficount); 58 new->e2fs_first_dblock = bswap32(old->e2fs_first_dblock); 59 new->e2fs_log_bsize = bswap32(old->e2fs_log_bsize); 60 new->e2fs_fsize = bswap32(old->e2fs_fsize); 61 new->e2fs_bpg = bswap32(old->e2fs_bpg); 62 new->e2fs_fpg = bswap32(old->e2fs_fpg); 63 new->e2fs_ipg = bswap32(old->e2fs_ipg); 64 new->e2fs_mtime = bswap32(old->e2fs_mtime); 65 new->e2fs_wtime = bswap32(old->e2fs_wtime); 66 new->e2fs_mnt_count = bswap16(old->e2fs_mnt_count); 67 new->e2fs_max_mnt_count = bswap16(old->e2fs_max_mnt_count); 68 new->e2fs_magic = bswap16(old->e2fs_magic); 69 new->e2fs_state = bswap16(old->e2fs_state); 70 new->e2fs_beh = bswap16(old->e2fs_beh); 71 new->e2fs_minrev = bswap16(old->e2fs_minrev); 72 new->e2fs_lastfsck = bswap32(old->e2fs_lastfsck); 73 new->e2fs_fsckintv = bswap32(old->e2fs_fsckintv); 74 new->e2fs_creator = bswap32(old->e2fs_creator); 75 new->e2fs_rev = bswap32(old->e2fs_rev); 76 new->e2fs_ruid = bswap16(old->e2fs_ruid); 77 new->e2fs_rgid = bswap16(old->e2fs_rgid); 78 new->e2fs_first_ino = bswap32(old->e2fs_first_ino); 79 new->e2fs_inode_size = bswap16(old->e2fs_inode_size); 80 new->e2fs_block_group_nr = bswap16(old->e2fs_block_group_nr); 81 new->e2fs_features_compat = bswap32(old->e2fs_features_compat); 82 new->e2fs_features_incompat = bswap32(old->e2fs_features_incompat); 83 new->e2fs_features_rocompat = bswap32(old->e2fs_features_rocompat); 84 new->e2fs_algo = bswap32(old->e2fs_algo); 85 } 86 87 void e2fs_cg_bswap(struct ext2_gd *old, struct ext2_gd *new, int size) 88 { 89 int i; 90 for (i=0; i < (size / sizeof(struct ext2_gd)); i++) { 91 new[i].ext2bgd_b_bitmap = bswap32(old[i].ext2bgd_b_bitmap); 92 new[i].ext2bgd_i_bitmap = bswap32(old[i].ext2bgd_i_bitmap); 93 new[i].ext2bgd_i_tables = bswap32(old[i].ext2bgd_i_tables); 94 new[i].ext2bgd_nbfree = bswap16(old[i].ext2bgd_nbfree); 95 new[i].ext2bgd_nifree = bswap16(old[i].ext2bgd_nifree); 96 new[i].ext2bgd_ndirs = bswap16(old[i].ext2bgd_ndirs); 97 } 98 } 99 100 void e2fs_i_bswap(struct ext2fs_dinode *old, struct ext2fs_dinode *new) 101 { 102 new->e2di_mode = bswap16(old->e2di_mode); 103 new->e2di_uid = bswap16(old->e2di_uid); 104 new->e2di_gid = bswap16(old->e2di_gid); 105 new->e2di_nlink = bswap16(old->e2di_nlink); 106 new->e2di_size = bswap32(old->e2di_size); 107 new->e2di_atime = bswap32(old->e2di_atime); 108 new->e2di_ctime = bswap32(old->e2di_ctime); 109 new->e2di_mtime = bswap32(old->e2di_mtime); 110 new->e2di_dtime = bswap32(old->e2di_dtime); 111 new->e2di_nblock = bswap32(old->e2di_nblock); 112 new->e2di_flags = bswap32(old->e2di_flags); 113 new->e2di_gen = bswap32(old->e2di_gen); 114 new->e2di_facl = bswap32(old->e2di_facl); 115 new->e2di_dacl = bswap32(old->e2di_dacl); 116 new->e2di_faddr = bswap32(old->e2di_faddr); 117 memcpy(&new->e2di_blocks[0], &old->e2di_blocks[0], 118 (NDADDR+NIADDR) * sizeof(int)); 119 } 120 #endif 121
Indexes created Tue Sep 30 11:09:46 GMT 2025