Annotation of sys/ufs/ext2fs/ext2fs_bswap.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: ext2fs_bswap.c,v 1.4 2007/06/17 20:15:25 jasper Exp $ */
! 2: /* $NetBSD: ext2fs_bswap.c,v 1.6 2000/07/24 00:23:10 mycroft Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1997 Manuel Bouyer.
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: * 3. All advertising materials mentioning features or use of this software
! 16: * must display the following acknowledgement:
! 17: * This product includes software developed by the University of
! 18: * California, Berkeley and its contributors.
! 19: * 4. Neither the name of the University nor the names of its contributors
! 20: * may be used to endorse or promote products derived from this software
! 21: * without specific prior written permission.
! 22: *
! 23: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 24: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 25: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 26: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 27: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 28: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 29: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 30: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 31: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 32: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 33: *
! 34: */
! 35:
! 36: #include <sys/types.h>
! 37: #if defined(_KERNEL)
! 38: #include <sys/systm.h>
! 39: #endif
! 40: #include <ufs/ext2fs/ext2fs.h>
! 41: #include <ufs/ext2fs/ext2fs_dinode.h>
! 42:
! 43: #if !defined(_KERNEL)
! 44: #include <string.h>
! 45: #endif
! 46:
! 47: /* These functions are only needed if native byte order is not big endian */
! 48: #if BYTE_ORDER == BIG_ENDIAN
! 49: void
! 50: e2fs_sb_bswap(struct ext2fs *old, struct ext2fs *new)
! 51: {
! 52: /* preserve unused fields */
! 53: memcpy(new, old, sizeof(struct ext2fs));
! 54: new->e2fs_icount = swap32(old->e2fs_icount);
! 55: new->e2fs_bcount = swap32(old->e2fs_bcount);
! 56: new->e2fs_rbcount = swap32(old->e2fs_rbcount);
! 57: new->e2fs_fbcount = swap32(old->e2fs_fbcount);
! 58: new->e2fs_ficount = swap32(old->e2fs_ficount);
! 59: new->e2fs_first_dblock = swap32(old->e2fs_first_dblock);
! 60: new->e2fs_log_bsize = swap32(old->e2fs_log_bsize);
! 61: new->e2fs_fsize = swap32(old->e2fs_fsize);
! 62: new->e2fs_bpg = swap32(old->e2fs_bpg);
! 63: new->e2fs_fpg = swap32(old->e2fs_fpg);
! 64: new->e2fs_ipg = swap32(old->e2fs_ipg);
! 65: new->e2fs_mtime = swap32(old->e2fs_mtime);
! 66: new->e2fs_wtime = swap32(old->e2fs_wtime);
! 67: new->e2fs_mnt_count = swap16(old->e2fs_mnt_count);
! 68: new->e2fs_max_mnt_count = swap16(old->e2fs_max_mnt_count);
! 69: new->e2fs_magic = swap16(old->e2fs_magic);
! 70: new->e2fs_state = swap16(old->e2fs_state);
! 71: new->e2fs_beh = swap16(old->e2fs_beh);
! 72: new->e2fs_minrev = swap16(old->e2fs_minrev);
! 73: new->e2fs_lastfsck = swap32(old->e2fs_lastfsck);
! 74: new->e2fs_fsckintv = swap32(old->e2fs_fsckintv);
! 75: new->e2fs_creator = swap32(old->e2fs_creator);
! 76: new->e2fs_rev = swap32(old->e2fs_rev);
! 77: new->e2fs_ruid = swap16(old->e2fs_ruid);
! 78: new->e2fs_rgid = swap16(old->e2fs_rgid);
! 79: new->e2fs_first_ino = swap32(old->e2fs_first_ino);
! 80: new->e2fs_inode_size = swap16(old->e2fs_inode_size);
! 81: new->e2fs_block_group_nr = swap16(old->e2fs_block_group_nr);
! 82: new->e2fs_features_compat = swap32(old->e2fs_features_compat);
! 83: new->e2fs_features_incompat = swap32(old->e2fs_features_incompat);
! 84: new->e2fs_features_rocompat = swap32(old->e2fs_features_rocompat);
! 85: new->e2fs_algo = swap32(old->e2fs_algo);
! 86: }
! 87:
! 88: void
! 89: e2fs_cg_bswap(struct ext2_gd *old, struct ext2_gd *new, int size)
! 90: {
! 91: int i;
! 92: for (i=0; i < (size / sizeof(struct ext2_gd)); i++) {
! 93: new[i].ext2bgd_b_bitmap = swap32(old[i].ext2bgd_b_bitmap);
! 94: new[i].ext2bgd_i_bitmap = swap32(old[i].ext2bgd_i_bitmap);
! 95: new[i].ext2bgd_i_tables = swap32(old[i].ext2bgd_i_tables);
! 96: new[i].ext2bgd_nbfree = swap16(old[i].ext2bgd_nbfree);
! 97: new[i].ext2bgd_nifree = swap16(old[i].ext2bgd_nifree);
! 98: new[i].ext2bgd_ndirs = swap16(old[i].ext2bgd_ndirs);
! 99: }
! 100: }
! 101:
! 102: void
! 103: e2fs_i_bswap(struct ext2fs_dinode *old, struct ext2fs_dinode *new)
! 104: {
! 105: new->e2di_mode = swap16(old->e2di_mode);
! 106: new->e2di_uid_low = swap16(old->e2di_uid_low);
! 107: new->e2di_gid_low = swap16(old->e2di_gid_low);
! 108: new->e2di_uid_high = swap16(old->e2di_uid_high);
! 109: new->e2di_gid_high = swap16(old->e2di_gid_high);
! 110: new->e2di_nlink = swap16(old->e2di_nlink);
! 111: new->e2di_size = swap32(old->e2di_size);
! 112: new->e2di_atime = swap32(old->e2di_atime);
! 113: new->e2di_ctime = swap32(old->e2di_ctime);
! 114: new->e2di_mtime = swap32(old->e2di_mtime);
! 115: new->e2di_dtime = swap32(old->e2di_dtime);
! 116: new->e2di_nblock = swap32(old->e2di_nblock);
! 117: new->e2di_flags = swap32(old->e2di_flags);
! 118: new->e2di_gen = swap32(old->e2di_gen);
! 119: new->e2di_facl = swap32(old->e2di_facl);
! 120: new->e2di_dacl = swap32(old->e2di_dacl);
! 121: new->e2di_faddr = swap32(old->e2di_faddr);
! 122: memcpy(&new->e2di_blocks[0], &old->e2di_blocks[0],
! 123: (NDADDR+NIADDR) * sizeof(int));
! 124: }
! 125: #endif
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