ffs_bswap.c revision 1.14
1 /* $NetBSD: ffs_bswap.c,v 1.14 2001/10/29 11:26:35 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1998 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 the University of 17 * California, Berkeley and its contributors. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 */ 34 35 #include <sys/param.h> 36 #if defined(_KERNEL) 37 #include <sys/systm.h> 38 #endif 39 40 #include <ufs/ufs/dinode.h> 41 #include <ufs/ufs/ufs_bswap.h> 42 #include <ufs/ffs/fs.h> 43 #include <ufs/ffs/ffs_extern.h> 44 45 #if !defined(_KERNEL) 46 #include <stddef.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #define panic(x) printf("%s\n", (x)), abort() 51 #endif 52 53 void 54 ffs_sb_swap(struct fs *o, struct fs *n) 55 { 56 int i, needswap, len; 57 u_int32_t *o32, *n32; 58 u_int16_t *o16, *n16; 59 u_int32_t postbloff, postblfmt; 60 61 if (o->fs_magic == FS_MAGIC) { 62 needswap = 0; 63 } else if (o->fs_magic == bswap32(FS_MAGIC)) { 64 needswap = 1; 65 } else { 66 panic("ffs_sb_swap: can't determine magic"); 67 } 68 postbloff = ufs_rw32(o->fs_postbloff, needswap); 69 postblfmt = ufs_rw32(o->fs_postblformat, needswap); 70 /* compute these before swapping, in case o == n */ 71 o16 = (postblfmt == FS_42POSTBLFMT) ? o->fs_opostbl[0] : 72 (int16_t *)((u_int8_t *)o + postbloff); 73 n16 = (postblfmt == FS_42POSTBLFMT) ? n->fs_opostbl[0] : 74 (int16_t *)((u_int8_t *)n + postbloff); 75 len = postblfmt == FS_42POSTBLFMT ? 76 sizeof(o->fs_opostbl) / sizeof(o->fs_opostbl[0][0]) : 77 ufs_rw32(o->fs_cpc, needswap) * ufs_rw32(o->fs_nrpos, needswap); 78 79 /* 80 * In order to avoid a lot of lines, as the first N fields (52) 81 * of the superblock up to fs_fmod are u_int32_t, we just loop 82 * here to convert them. 83 */ 84 o32 = (u_int32_t *)o; 85 n32 = (u_int32_t *)n; 86 for (i = 0; i < offsetof(struct fs, fs_fmod) / sizeof(u_int32_t); i++) 87 n32[i] = bswap32(o32[i]); 88 89 /* fs_cgrotor is now unused */ 90 n->fs_cpc = bswap32(o->fs_cpc); 91 /* fs_opostbl - may be done below */ 92 /* fs_snapinum[20] - ignore for now */ 93 n->fs_avgfilesize = bswap32(o->fs_avgfilesize); 94 n->fs_avgfpdir = bswap32(o->fs_avgfpdir); 95 /* fs_sparecon[28] - ignore for now */ 96 n->fs_contigsumsize = bswap32(o->fs_contigsumsize); 97 n->fs_maxsymlinklen = bswap32(o->fs_maxsymlinklen); 98 n->fs_inodefmt = bswap32(o->fs_inodefmt); 99 n->fs_maxfilesize = bswap64(o->fs_maxfilesize); 100 n->fs_qbmask = bswap64(o->fs_qbmask); 101 n->fs_qfmask = bswap64(o->fs_qfmask); 102 n->fs_state = bswap32(o->fs_state); 103 n->fs_postblformat = bswap32(o->fs_postblformat); 104 n->fs_nrpos = bswap32(o->fs_nrpos); 105 n->fs_postbloff = bswap32(o->fs_postbloff); 106 n->fs_rotbloff = bswap32(o->fs_rotbloff); 107 n->fs_magic = bswap32(o->fs_magic); 108 /* byteswap the postbl */ 109 for (i = 0; i < len; i++) 110 n16[i] = bswap16(o16[i]); 111 } 112 113 void 114 ffs_dinode_swap(struct dinode *o, struct dinode *n) 115 { 116 117 n->di_mode = bswap16(o->di_mode); 118 n->di_nlink = bswap16(o->di_nlink); 119 n->di_u.oldids[0] = bswap16(o->di_u.oldids[0]); 120 n->di_u.oldids[1] = bswap16(o->di_u.oldids[1]); 121 n->di_size = bswap64(o->di_size); 122 n->di_atime = bswap32(o->di_atime); 123 n->di_atimensec = bswap32(o->di_atimensec); 124 n->di_mtime = bswap32(o->di_mtime); 125 n->di_mtimensec = bswap32(o->di_mtimensec); 126 n->di_ctime = bswap32(o->di_ctime); 127 n->di_ctimensec = bswap32(o->di_ctimensec); 128 memcpy(n->di_db, o->di_db, (NDADDR + NIADDR) * sizeof(u_int32_t)); 129 n->di_flags = bswap32(o->di_flags); 130 n->di_blocks = bswap32(o->di_blocks); 131 n->di_gen = bswap32(o->di_gen); 132 n->di_uid = bswap32(o->di_uid); 133 n->di_gid = bswap32(o->di_gid); 134 } 135 136 void 137 ffs_csum_swap(struct csum *o, struct csum *n, int size) 138 { 139 int i; 140 u_int32_t *oint, *nint; 141 142 oint = (u_int32_t*)o; 143 nint = (u_int32_t*)n; 144 145 for (i = 0; i < size / sizeof(u_int32_t); i++) 146 nint[i] = bswap32(oint[i]); 147 } 148
Indexes created Sun Oct 12 09:09:55 GMT 2025