1 /*- 2 * Copyright (c) 1995 The University of Utah and 3 * the Computer Systems Laboratory at the University of Utah (CSL). 4 * All rights reserved. 5 * 6 * Permission to use, copy, modify and distribute this software is hereby 7 * granted provided that (1) source code retains these copyright, permission, 8 * and disclaimer notices, and (2) redistributions including binaries 9 * reproduce the notices in supporting documentation, and (3) all advertising 10 * materials mentioning features or use of this software display the following 11 * acknowledgement: ``This product includes software developed by the 12 * Computer Systems Laboratory at the University of Utah.'' 13 * 14 * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS 15 * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF 16 * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 17 * 18 * CSL requests users of this software to return to csl-dist@cs.utah.edu any 19 * improvements that they make and grant CSL redistribution rights. 20 * 21 * Utah $Hdr$ 22 * $FreeBSD$ 23 */ 24 25 /* 26 * routines to convert on disk ext2 inodes into inodes and back 27 */ 28 #include <sys/param.h> 29 #include <sys/systm.h> 30 #include <sys/endian.h> 31 #include <sys/lock.h> 32 #include <sys/stat.h> 33 #include <sys/vnode.h> 34 35 #include <fs/ext2fs/inode.h> 36 #include <fs/ext2fs/ext2fs.h> 37 #include <fs/ext2fs/ext2_dinode.h> 38 #include <fs/ext2fs/ext2_extern.h> 39 40 #define XTIME_TO_NSEC(x) ((x & EXT3_NSEC_MASK) >> 2) 41 #define NSEC_TO_XTIME(t) (le32toh(t << 2) & EXT3_NSEC_MASK) 42 43 void 44 ext2_print_inode( in ) 45 struct inode *in; 46 { 47 int i; 48 49 printf( "Inode: %5ju", (uintmax_t)in->i_number); 50 printf( /* "Inode: %5d" */ 51 " Type: %10s Mode: 0x%o Flags: 0x%x Version: %d\n", 52 "n/a", in->i_mode, in->i_flags, in->i_gen); 53 printf( "User: %5lu Group: %5lu Size: %lu\n", 54 (unsigned long)in->i_uid, (unsigned long)in->i_gid, 55 (unsigned long)in->i_size); 56 printf( "Links: %3d Blockcount: %d\n", 57 in->i_nlink, in->i_blocks); 58 printf( "ctime: 0x%x", in->i_ctime); 59 printf( "atime: 0x%x", in->i_atime); 60 printf( "mtime: 0x%x", in->i_mtime); 61 printf( "BLOCKS: "); 62 for(i=0; i < (in->i_blocks <= 24 ? ((in->i_blocks+1)/2): 12); i++) 63 printf("%d ", in->i_db[i]); 64 printf("\n"); 65 } 66 67 /* 68 * raw ext2 inode to inode 69 */ 70 void 71 ext2_ei2i(ei, ip) 72 struct ext2fs_dinode *ei; 73 struct inode *ip; 74 { 75 int i; 76 77 ip->i_nlink = ei->e2di_nlink; 78 /* Godmar thinks - if the link count is zero, then the inode is 79 unused - according to ext2 standards. Ufs marks this fact 80 by setting i_mode to zero - why ? 81 I can see that this might lead to problems in an undelete. 82 */ 83 ip->i_mode = ei->e2di_nlink ? ei->e2di_mode : 0; 84 ip->i_size = ei->e2di_size; 85 if (S_ISREG(ip->i_mode)) 86 ip->i_size |= ((u_int64_t)ei->e2di_size_high) << 32; 87 ip->i_atime = ei->e2di_atime; 88 ip->i_mtime = ei->e2di_mtime; 89 ip->i_ctime = ei->e2di_ctime; 90 if (E2DI_HAS_XTIME(ip)) { 91 ip->i_atimensec = XTIME_TO_NSEC(ei->e2di_atime_extra); 92 ip->i_mtimensec = XTIME_TO_NSEC(ei->e2di_mtime_extra); 93 ip->i_ctimensec = XTIME_TO_NSEC(ei->e2di_ctime_extra); 94 ip->i_birthtime = ei->e2di_crtime; 95 ip->i_birthnsec = XTIME_TO_NSEC(ei->e2di_crtime_extra); 96 } 97 ip->i_flags = 0; 98 ip->i_flags |= (ei->e2di_flags & EXT2_APPEND) ? SF_APPEND : 0; 99 ip->i_flags |= (ei->e2di_flags & EXT2_IMMUTABLE) ? SF_IMMUTABLE : 0; 100 ip->i_flags |= (ei->e2di_flags & EXT2_NODUMP) ? UF_NODUMP : 0; 101 ip->i_blocks = ei->e2di_nblock; 102 ip->i_gen = ei->e2di_gen; 103 ip->i_uid = ei->e2di_uid; 104 ip->i_gid = ei->e2di_gid; 105 /* XXX use memcpy */ 106 for(i = 0; i < NDADDR; i++) 107 ip->i_db[i] = ei->e2di_blocks[i]; 108 for(i = 0; i < NIADDR; i++) 109 ip->i_ib[i] = ei->e2di_blocks[EXT2_NDIR_BLOCKS + i]; 110 } 111 112 /* 113 * inode to raw ext2 inode 114 */ 115 void 116 ext2_i2ei(ip, ei) 117 struct inode *ip; 118 struct ext2fs_dinode *ei; 119 { 120 int i; 121 122 ei->e2di_mode = ip->i_mode; 123 ei->e2di_nlink = ip->i_nlink; 124 /* 125 Godmar thinks: if dtime is nonzero, ext2 says this inode 126 has been deleted, this would correspond to a zero link count 127 */ 128 ei->e2di_dtime = ei->e2di_nlink ? 0 : ip->i_mtime; 129 ei->e2di_size = ip->i_size; 130 if (S_ISREG(ip->i_mode)) 131 ei->e2di_size_high = ip->i_size >> 32; 132 ei->e2di_atime = ip->i_atime; 133 ei->e2di_mtime = ip->i_mtime; 134 ei->e2di_ctime = ip->i_ctime; 135 if (E2DI_HAS_XTIME(ip)) { 136 ei->e2di_ctime_extra = NSEC_TO_XTIME(ip->i_ctimensec); 137 ei->e2di_mtime_extra = NSEC_TO_XTIME(ip->i_mtimensec); 138 ei->e2di_atime_extra = NSEC_TO_XTIME(ip->i_atimensec); 139 ei->e2di_crtime = ip->i_birthtime; 140 ei->e2di_crtime_extra = NSEC_TO_XTIME(ip->i_birthnsec); 141 } 142 ei->e2di_flags = ip->i_flags; 143 ei->e2di_flags = 0; 144 ei->e2di_flags |= (ip->i_flags & SF_APPEND) ? EXT2_APPEND: 0; 145 ei->e2di_flags |= (ip->i_flags & SF_IMMUTABLE) ? EXT2_IMMUTABLE: 0; 146 ei->e2di_flags |= (ip->i_flags & UF_NODUMP) ? EXT2_NODUMP: 0; 147 ei->e2di_nblock = ip->i_blocks; 148 ei->e2di_gen = ip->i_gen; 149 ei->e2di_uid = ip->i_uid; 150 ei->e2di_gid = ip->i_gid; 151 /* XXX use memcpy */ 152 for(i = 0; i < NDADDR; i++) 153 ei->e2di_blocks[i] = ip->i_db[i]; 154 for(i = 0; i < NIADDR; i++) 155 ei->e2di_blocks[EXT2_NDIR_BLOCKS + i] = ip->i_ib[i]; 156 } 157