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/fs.h> 36 #include <fs/ext2fs/inode.h> 37 #include <fs/ext2fs/ext2fs.h> 38 #include <fs/ext2fs/ext2_dinode.h> 39 #include <fs/ext2fs/ext2_extern.h> 40 41 #define XTIME_TO_NSEC(x) ((x & EXT3_NSEC_MASK) >> 2) 42 #define NSEC_TO_XTIME(t) (le32toh(t << 2) & EXT3_NSEC_MASK) 43 44 #ifdef EXT2FS_DEBUG 45 void 46 ext2_print_inode(struct inode *in) 47 { 48 int i; 49 struct ext4_extent_header *ehp; 50 struct ext4_extent *ep; 51 52 printf("Inode: %5ju", (uintmax_t)in->i_number); 53 printf( /* "Inode: %5d" */ 54 " Type: %10s Mode: 0x%o Flags: 0x%x Version: %d acl: 0x%lx\n", 55 "n/a", in->i_mode, in->i_flags, in->i_gen, in->i_facl); 56 printf("User: %5u Group: %5u Size: %ju\n", 57 in->i_uid, in->i_gid, (uintmax_t)in->i_size); 58 printf("Links: %3d Blockcount: %ju\n", 59 in->i_nlink, (uintmax_t)in->i_blocks); 60 printf("ctime: 0x%x", in->i_ctime); 61 printf("atime: 0x%x", in->i_atime); 62 printf("mtime: 0x%x", in->i_mtime); 63 if (E2DI_HAS_XTIME(in)) 64 printf("crtime %#x ", in->i_birthtime); 65 if (in->i_flag & IN_E4EXTENTS) { 66 printf("Extents:\n"); 67 ehp = (struct ext4_extent_header *)in->i_db; 68 printf("Header (magic 0x%x entries %d max %d depth %d gen %d)\n", 69 ehp->eh_magic, ehp->eh_ecount, ehp->eh_max, ehp->eh_depth, 70 ehp->eh_gen); 71 ep = (struct ext4_extent *)(char *)(ehp + 1); 72 printf("Index (blk %d len %d start_lo %d start_hi %d)\n", ep->e_blk, 73 ep->e_len, ep->e_start_lo, ep->e_start_hi); 74 printf("\n"); 75 } else { 76 printf("BLOCKS:"); 77 for (i = 0; i < (in->i_blocks <= 24 ? (in->i_blocks + 1) / 2 : 12); i++) 78 printf(" %d", in->i_db[i]); 79 printf("\n"); 80 } 81 } 82 #endif /* EXT2FS_DEBUG */ 83 84 /* 85 * raw ext2 inode to inode 86 */ 87 void 88 ext2_ei2i(struct ext2fs_dinode *ei, struct inode *ip) 89 { 90 ip->i_nlink = ei->e2di_nlink; 91 /* 92 * Godmar thinks - if the link count is zero, then the inode is 93 * unused - according to ext2 standards. Ufs marks this fact by 94 * setting i_mode to zero - why ? I can see that this might lead to 95 * problems in an undelete. 96 */ 97 ip->i_mode = ei->e2di_nlink ? ei->e2di_mode : 0; 98 ip->i_size = ei->e2di_size; 99 if (S_ISREG(ip->i_mode)) 100 ip->i_size |= ((u_int64_t)ei->e2di_size_high) << 32; 101 ip->i_atime = ei->e2di_atime; 102 ip->i_mtime = ei->e2di_mtime; 103 ip->i_ctime = ei->e2di_ctime; 104 if (E2DI_HAS_XTIME(ip)) { 105 ip->i_atimensec = XTIME_TO_NSEC(ei->e2di_atime_extra); 106 ip->i_mtimensec = XTIME_TO_NSEC(ei->e2di_mtime_extra); 107 ip->i_ctimensec = XTIME_TO_NSEC(ei->e2di_ctime_extra); 108 ip->i_birthtime = ei->e2di_crtime; 109 ip->i_birthnsec = XTIME_TO_NSEC(ei->e2di_crtime_extra); 110 } 111 ip->i_flags = 0; 112 ip->i_flags |= (ei->e2di_flags & EXT2_APPEND) ? SF_APPEND : 0; 113 ip->i_flags |= (ei->e2di_flags & EXT2_IMMUTABLE) ? SF_IMMUTABLE : 0; 114 ip->i_flags |= (ei->e2di_flags & EXT2_NODUMP) ? UF_NODUMP : 0; 115 ip->i_flag |= (ei->e2di_flags & EXT3_INDEX) ? IN_E3INDEX : 0; 116 ip->i_flag |= (ei->e2di_flags & EXT4_EXTENTS) ? IN_E4EXTENTS : 0; 117 ip->i_blocks = ei->e2di_nblock; 118 ip->i_facl = ei->e2di_facl; 119 if (E2DI_HAS_HUGE_FILE(ip)) { 120 ip->i_blocks |= (uint64_t)ei->e2di_nblock_high << 32; 121 ip->i_facl |= (uint64_t)ei->e2di_facl_high << 32; 122 if (ei->e2di_flags & EXT4_HUGE_FILE) 123 ip->i_blocks = fsbtodb(ip->i_e2fs, ip->i_blocks); 124 } 125 ip->i_gen = ei->e2di_gen; 126 ip->i_uid = ei->e2di_uid; 127 ip->i_gid = ei->e2di_gid; 128 ip->i_uid |= (uint32_t)ei->e2di_uid_high << 16; 129 ip->i_gid |= (uint32_t)ei->e2di_gid_high << 16; 130 131 memcpy(ip->i_data, ei->e2di_blocks, sizeof(ei->e2di_blocks)); 132 } 133 134 /* 135 * inode to raw ext2 inode 136 */ 137 int 138 ext2_i2ei(struct inode *ip, struct ext2fs_dinode *ei) 139 { 140 struct m_ext2fs *fs; 141 142 fs = ip->i_e2fs; 143 ei->e2di_mode = ip->i_mode; 144 ei->e2di_nlink = ip->i_nlink; 145 /* 146 * Godmar thinks: if dtime is nonzero, ext2 says this inode has been 147 * deleted, this would correspond to a zero link count 148 */ 149 ei->e2di_dtime = ei->e2di_nlink ? 0 : ip->i_mtime; 150 ei->e2di_size = ip->i_size; 151 if (S_ISREG(ip->i_mode)) 152 ei->e2di_size_high = ip->i_size >> 32; 153 ei->e2di_atime = ip->i_atime; 154 ei->e2di_mtime = ip->i_mtime; 155 ei->e2di_ctime = ip->i_ctime; 156 if (E2DI_HAS_XTIME(ip)) { 157 ei->e2di_ctime_extra = NSEC_TO_XTIME(ip->i_ctimensec); 158 ei->e2di_mtime_extra = NSEC_TO_XTIME(ip->i_mtimensec); 159 ei->e2di_atime_extra = NSEC_TO_XTIME(ip->i_atimensec); 160 ei->e2di_crtime = ip->i_birthtime; 161 ei->e2di_crtime_extra = NSEC_TO_XTIME(ip->i_birthnsec); 162 } 163 ei->e2di_flags = 0; 164 ei->e2di_flags |= (ip->i_flags & SF_APPEND) ? EXT2_APPEND : 0; 165 ei->e2di_flags |= (ip->i_flags & SF_IMMUTABLE) ? EXT2_IMMUTABLE : 0; 166 ei->e2di_flags |= (ip->i_flags & UF_NODUMP) ? EXT2_NODUMP : 0; 167 ei->e2di_flags |= (ip->i_flag & IN_E3INDEX) ? EXT3_INDEX : 0; 168 ei->e2di_flags |= (ip->i_flag & IN_E4EXTENTS) ? EXT4_EXTENTS : 0; 169 if (ip->i_blocks > ~0U && 170 !EXT2_HAS_RO_COMPAT_FEATURE(fs, EXT2F_ROCOMPAT_HUGE_FILE)) { 171 ext2_fserr(fs, ip->i_uid, "i_blocks value is out of range"); 172 return (EIO); 173 } 174 if (ip->i_blocks <= 0xffffffffffffULL) { 175 ei->e2di_nblock = ip->i_blocks & 0xffffffff; 176 ei->e2di_nblock_high = ip->i_blocks >> 32 & 0xffff; 177 } else { 178 ei->e2di_flags |= EXT4_HUGE_FILE; 179 ei->e2di_nblock = dbtofsb(fs, ip->i_blocks); 180 ei->e2di_nblock_high = dbtofsb(fs, ip->i_blocks) >> 32 & 0xffff; 181 } 182 ei->e2di_facl = ip->i_facl & 0xffffffff; 183 ei->e2di_facl_high = ip->i_facl >> 32 & 0xffff; 184 ei->e2di_gen = ip->i_gen; 185 ei->e2di_uid = ip->i_uid & 0xffff; 186 ei->e2di_uid_high = ip->i_uid >> 16 & 0xffff; 187 ei->e2di_gid = ip->i_gid & 0xffff; 188 ei->e2di_gid_high = ip->i_gid >> 16 & 0xffff; 189 190 memcpy(ei->e2di_blocks, ip->i_data, sizeof(ei->e2di_blocks)); 191 192 return (0); 193 } 194