ext2_inode_cnv.c revision 320841
150472Speter/*- 21823Sphk * Copyright (c) 1995 The University of Utah and 345763Sobrien * the Computer Systems Laboratory at the University of Utah (CSL). 445763Sobrien * All rights reserved. 518390Speter * 695294Sobrien * Permission to use, copy, modify and distribute this software is hereby 795294Sobrien * granted provided that (1) source code retains these copyright, permission, 895294Sobrien * and disclaimer notices, and (2) redistributions including binaries 9207995Sobrien * reproduce the notices in supporting documentation, and (3) all advertising 1096340Sobrien * materials mentioning features or use of this software display the following 11169718Skan * acknowledgement: ``This product includes software developed by the 122375Sbde * Computer Systems Laboratory at the University of Utah.'' 1396340Sobrien * 1445943Sobrien * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS 1518390Speter * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF 1696340Sobrien * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 17167471Skan * 1845299Sobrien * CSL requests users of this software to return to csl-dist@cs.utah.edu any 19207995Sobrien * improvements that they make and grant CSL redistribution rights. 2073306Sobrien * 2155220Sobrien * Utah $Hdr$ 2296340Sobrien * $FreeBSD: stable/10/sys/fs/ext2fs/ext2_inode_cnv.c 320841 2017-07-09 15:14:22Z pfg $ 23189834Sdas */ 2468572Sobrien 2555220Sobrien/* 26259563Spfg * routines to convert on disk ext2 inodes into inodes and back 2745943Sobrien */ 2845943Sobrien#include <sys/param.h> 29245539Sandrew#include <sys/systm.h> 30245539Sandrew#include <sys/endian.h> 31245539Sandrew#include <sys/lock.h> 32245539Sandrew#include <sys/stat.h> 33239272Sgonzo#include <sys/vnode.h> 34215082Simp 35215082Simp#include <fs/ext2fs/fs.h> 36239272Sgonzo#include <fs/ext2fs/inode.h> 37239272Sgonzo#include <fs/ext2fs/ext2fs.h> 38239272Sgonzo#include <fs/ext2fs/ext2_dinode.h> 39215082Simp#include <fs/ext2fs/ext2_extern.h> 40215082Simp 41217123Simp#define XTIME_TO_NSEC(x) ((x & EXT3_NSEC_MASK) >> 2) 42204771Simp#define NSEC_TO_XTIME(t) (le32toh(t << 2) & EXT3_NSEC_MASK) 43204771Simp 44204771Simp#ifdef EXT2FS_DEBUG 45217123Simpvoid 46217123Simpext2_print_inode(struct inode *in) 47217123Simp{ 48208737Sjmallett int i; 49217123Simp struct ext4_extent_header *ehp; 50217123Simp struct ext4_extent *ep; 51208737Sjmallett 52208737Sjmallett printf("Inode: %5ju", (uintmax_t)in->i_number); 53208737Sjmallett printf( /* "Inode: %5d" */ 54208758Sjmallett " Type: %10s Mode: 0x%o Flags: 0x%x Version: %d\n", 55208758Sjmallett "n/a", in->i_mode, in->i_flags, in->i_gen); 56208758Sjmallett printf("User: %5u Group: %5u Size: %ju\n", 57208758Sjmallett in->i_uid, in->i_gid, (uintmax_t)in->i_size); 58208758Sjmallett printf("Links: %3d Blockcount: %ju\n", 59208758Sjmallett in->i_nlink, (uintmax_t)in->i_blocks); 60208758Sjmallett printf("ctime: 0x%x", in->i_ctime); 61208758Sjmallett printf("atime: 0x%x", in->i_atime); 62208737Sjmallett printf("mtime: 0x%x", in->i_mtime); 63208737Sjmallett if (E2DI_HAS_XTIME(in)) 64208737Sjmallett printf("crtime %#x ", in->i_birthtime); 65208737Sjmallett printf("BLOCKS:"); 66208737Sjmallett for (i = 0; i < (in->i_blocks <= 24 ? (in->i_blocks + 1) / 2 : 12); i++) 67208737Sjmallett printf(" %d", in->i_db[i]); 68208737Sjmallett printf("\n"); 69208737Sjmallett printf("Extents:\n"); 7081749Sobrien ehp = (struct ext4_extent_header *)in->i_db; 7181749Sobrien printf("Header (magic 0x%x entries %d max %d depth %d gen %d)\n", 7281749Sobrien ehp->eh_magic, ehp->eh_ecount, ehp->eh_max, ehp->eh_depth, 7381749Sobrien ehp->eh_gen); 7418390Speter ep = (struct ext4_extent *)(char *)(ehp + 1); 7518390Speter printf("Index (blk %d len %d start_lo %d start_hi %d)\n", ep->e_blk, 7645301Sobrien ep->e_len, ep->e_start_lo, ep->e_start_hi); 7718390Speter printf("\n"); 7854987Sobrien} 7954987Sobrien#endif /* EXT2FS_DEBUG */ 8052170Sobrien 8118390Speter/* 82169718Skan * raw ext2 inode to inode 83169718Skan */ 84169718Skanvoid 85169718Skanext2_ei2i(struct ext2fs_dinode *ei, struct inode *ip) 8616663Sjkh{ 87169718Skan int i; 882375Sbde 89169718Skan ip->i_nlink = ei->e2di_nlink; 902375Sbde /* 912375Sbde * Godmar thinks - if the link count is zero, then the inode is 92169718Skan * unused - according to ext2 standards. Ufs marks this fact by 93169718Skan * setting i_mode to zero - why ? I can see that this might lead to 94169718Skan * problems in an undelete. 95169718Skan */ 96169718Skan ip->i_mode = ei->e2di_nlink ? ei->e2di_mode : 0; 97169718Skan ip->i_size = ei->e2di_size; 98169718Skan if (S_ISREG(ip->i_mode)) 99169718Skan ip->i_size |= ((u_int64_t)ei->e2di_size_high) << 32; 100169718Skan ip->i_atime = ei->e2di_atime; 101169718Skan ip->i_mtime = ei->e2di_mtime; 102169718Skan ip->i_ctime = ei->e2di_ctime; 103169718Skan if (E2DI_HAS_XTIME(ip)) { 104169718Skan ip->i_atimensec = XTIME_TO_NSEC(ei->e2di_atime_extra); 105169718Skan ip->i_mtimensec = XTIME_TO_NSEC(ei->e2di_mtime_extra); 106169718Skan ip->i_ctimensec = XTIME_TO_NSEC(ei->e2di_ctime_extra); 107169718Skan ip->i_birthtime = ei->e2di_crtime; 108169718Skan ip->i_birthnsec = XTIME_TO_NSEC(ei->e2di_crtime_extra); 109169718Skan } 11095294Sobrien ip->i_flags = 0; 111 ip->i_flags |= (ei->e2di_flags & EXT2_APPEND) ? SF_APPEND : 0; 112 ip->i_flags |= (ei->e2di_flags & EXT2_IMMUTABLE) ? SF_IMMUTABLE : 0; 113 ip->i_flags |= (ei->e2di_flags & EXT2_NODUMP) ? UF_NODUMP : 0; 114 ip->i_flag |= (ei->e2di_flags & EXT3_INDEX) ? IN_E3INDEX : 0; 115 ip->i_flag |= (ei->e2di_flags & EXT4_EXTENTS) ? IN_E4EXTENTS : 0; 116 ip->i_blocks = ei->e2di_nblock; 117 if (E2DI_HAS_HUGE_FILE(ip)) { 118 ip->i_blocks |= (uint64_t)ei->e2di_nblock_high << 32; 119 if (ei->e2di_flags & EXT4_HUGE_FILE) 120 ip->i_blocks = fsbtodb(ip->i_e2fs, ip->i_blocks); 121 } 122 ip->i_gen = ei->e2di_gen; 123 ip->i_uid = ei->e2di_uid; 124 ip->i_gid = ei->e2di_gid; 125 ip->i_uid |= (uint32_t)ei->e2di_uid_high << 16; 126 ip->i_gid |= (uint32_t)ei->e2di_gid_high << 16; 127 /* XXX use memcpy */ 128 for (i = 0; i < NDADDR; i++) 129 ip->i_db[i] = ei->e2di_blocks[i]; 130 for (i = 0; i < NIADDR; i++) 131 ip->i_ib[i] = ei->e2di_blocks[EXT2_NDIR_BLOCKS + i]; 132} 133 134/* 135 * inode to raw ext2 inode 136 */ 137void 138ext2_i2ei(struct inode *ip, struct ext2fs_dinode *ei) 139{ 140 int i; 141 142 ei->e2di_mode = ip->i_mode; 143 ei->e2di_nlink = ip->i_nlink; 144 /* 145 * Godmar thinks: if dtime is nonzero, ext2 says this inode has been 146 * deleted, this would correspond to a zero link count 147 */ 148 ei->e2di_dtime = ei->e2di_nlink ? 0 : ip->i_mtime; 149 ei->e2di_size = ip->i_size; 150 if (S_ISREG(ip->i_mode)) 151 ei->e2di_size_high = ip->i_size >> 32; 152 ei->e2di_atime = ip->i_atime; 153 ei->e2di_mtime = ip->i_mtime; 154 ei->e2di_ctime = ip->i_ctime; 155 if (E2DI_HAS_XTIME(ip)) { 156 ei->e2di_ctime_extra = NSEC_TO_XTIME(ip->i_ctimensec); 157 ei->e2di_mtime_extra = NSEC_TO_XTIME(ip->i_mtimensec); 158 ei->e2di_atime_extra = NSEC_TO_XTIME(ip->i_atimensec); 159 ei->e2di_crtime = ip->i_birthtime; 160 ei->e2di_crtime_extra = NSEC_TO_XTIME(ip->i_birthnsec); 161 } 162 ei->e2di_flags = 0; 163 ei->e2di_flags |= (ip->i_flags & SF_APPEND) ? EXT2_APPEND : 0; 164 ei->e2di_flags |= (ip->i_flags & SF_IMMUTABLE) ? EXT2_IMMUTABLE : 0; 165 ei->e2di_flags |= (ip->i_flags & UF_NODUMP) ? EXT2_NODUMP : 0; 166 ei->e2di_flags |= (ip->i_flag & IN_E3INDEX) ? EXT3_INDEX : 0; 167 ei->e2di_flags |= (ip->i_flag & IN_E4EXTENTS) ? EXT4_EXTENTS : 0; 168 ei->e2di_nblock = ip->i_blocks & 0xffffffff; 169 ei->e2di_nblock_high = ip->i_blocks >> 32 & 0xffff; 170 ei->e2di_gen = ip->i_gen; 171 ei->e2di_uid = ip->i_uid & 0xffff; 172 ei->e2di_uid_high = ip->i_uid >> 16 & 0xffff; 173 ei->e2di_gid = ip->i_gid & 0xffff; 174 ei->e2di_gid_high = ip->i_gid >> 16 & 0xffff; 175 /* XXX use memcpy */ 176 for (i = 0; i < NDADDR; i++) 177 ei->e2di_blocks[i] = ip->i_db[i]; 178 for (i = 0; i < NIADDR; i++) 179 ei->e2di_blocks[EXT2_NDIR_BLOCKS + i] = ip->i_ib[i]; 180} 181